diff options
45 files changed, 3977 insertions, 1443 deletions
diff --git a/Documentation/devicetree/bindings/mmc/mtk-sd.txt b/Documentation/devicetree/bindings/mmc/mtk-sd.txt index 72d2a734ab85..9b8017670870 100644 --- a/Documentation/devicetree/bindings/mmc/mtk-sd.txt +++ b/Documentation/devicetree/bindings/mmc/mtk-sd.txt @@ -12,6 +12,8 @@ Required properties: "mediatek,mt8173-mmc": for mmc host ip compatible with mt8173 "mediatek,mt2701-mmc": for mmc host ip compatible with mt2701 "mediatek,mt2712-mmc": for mmc host ip compatible with mt2712 + "mediatek,mt7623-mmc", "mediatek,mt2701-mmc": for MT7623 SoC + - reg: physical base address of the controller and length - interrupts: Should contain MSDC interrupt number - clocks: Should contain phandle for the clock feeding the MMC controller diff --git a/Documentation/devicetree/bindings/mmc/tmio_mmc.txt b/Documentation/devicetree/bindings/mmc/tmio_mmc.txt index 3c6762430fd9..d8685cb83325 100644 --- a/Documentation/devicetree/bindings/mmc/tmio_mmc.txt +++ b/Documentation/devicetree/bindings/mmc/tmio_mmc.txt @@ -26,6 +26,7 @@ Required properties: "renesas,sdhi-r8a7794" - SDHI IP on R8A7794 SoC "renesas,sdhi-r8a7795" - SDHI IP on R8A7795 SoC "renesas,sdhi-r8a7796" - SDHI IP on R8A7796 SoC + "renesas,sdhi-r8a77995" - SDHI IP on R8A77995 SoC "renesas,sdhi-shmobile" - a generic sh-mobile SDHI controller "renesas,rcar-gen1-sdhi" - a generic R-Car Gen1 SDHI controller "renesas,rcar-gen2-sdhi" - a generic R-Car Gen2 or RZ/G1 diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c index ccfa98af1dd3..20135a5de748 100644 --- a/drivers/mmc/core/block.c +++ b/drivers/mmc/core/block.c @@ -63,7 +63,13 @@ MODULE_ALIAS("mmc:block"); #endif #define MODULE_PARAM_PREFIX "mmcblk." -#define MMC_BLK_TIMEOUT_MS (10 * 60 * 1000) /* 10 minute timeout */ +/* + * Set a 10 second timeout for polling write request busy state. Note, mmc core + * is setting a 3 second timeout for SD cards, and SDHCI has long had a 10 + * second software timer to timeout the whole request, so 10 seconds should be + * ample. + */ +#define MMC_BLK_TIMEOUT_MS (10 * 1000) #define MMC_SANITIZE_REQ_TIMEOUT 240000 #define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16) @@ -112,6 +118,7 @@ struct mmc_blk_data { #define MMC_BLK_WRITE BIT(1) #define MMC_BLK_DISCARD BIT(2) #define MMC_BLK_SECDISCARD BIT(3) +#define MMC_BLK_CQE_RECOVERY BIT(4) /* * Only set in main mmc_blk_data associated @@ -189,7 +196,7 @@ static void mmc_blk_put(struct mmc_blk_data *md) md->usage--; if (md->usage == 0) { int devidx = mmc_get_devidx(md->disk); - blk_cleanup_queue(md->queue.queue); + blk_put_queue(md->queue.queue); ida_simple_remove(&mmc_blk_ida, devidx); put_disk(md->disk); kfree(md); @@ -921,14 +928,54 @@ static int mmc_sd_num_wr_blocks(struct mmc_card *card, u32 *written_blocks) return 0; } +static unsigned int mmc_blk_clock_khz(struct mmc_host *host) +{ + if (host->actual_clock) + return host->actual_clock / 1000; + + /* Clock may be subject to a divisor, fudge it by a factor of 2. */ + if (host->ios.clock) + return host->ios.clock / 2000; + + /* How can there be no clock */ + WARN_ON_ONCE(1); + return 100; /* 100 kHz is minimum possible value */ +} + +static unsigned int mmc_blk_data_timeout_ms(struct mmc_host *host, + struct mmc_data *data) +{ + unsigned int ms = DIV_ROUND_UP(data->timeout_ns, 1000000); + unsigned int khz; + + if (data->timeout_clks) { + khz = mmc_blk_clock_khz(host); + ms += DIV_ROUND_UP(data->timeout_clks, khz); + } + + return ms; +} + +static inline bool mmc_blk_in_tran_state(u32 status) +{ + /* + * Some cards mishandle the status bits, so make sure to check both the + * busy indication and the card state. + */ + return status & R1_READY_FOR_DATA && + (R1_CURRENT_STATE(status) == R1_STATE_TRAN); +} + static int card_busy_detect(struct mmc_card *card, unsigned int timeout_ms, - bool hw_busy_detect, struct request *req, bool *gen_err) + struct request *req, u32 *resp_errs) { unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms); int err = 0; u32 status; do { + bool done = time_after(jiffies, timeout); + err = __mmc_send_status(card, &status, 5); if (err) { pr_err("%s: error %d requesting status\n", @@ -936,25 +983,18 @@ static int card_busy_detect(struct mmc_card *card, unsigned int timeout_ms, return err; } - if (status & R1_ERROR) { - pr_err("%s: %s: error sending status cmd, status %#x\n", - req->rq_disk->disk_name, __func__, status); - *gen_err = true; - } - - /* We may rely on the host hw to handle busy detection.*/ - if ((card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) && - hw_busy_detect) - break; + /* Accumulate any response error bits seen */ + if (resp_errs) + *resp_errs |= status; /* * Timeout if the device never becomes ready for data and never * leaves the program state. */ - if (time_after(jiffies, timeout)) { - pr_err("%s: Card stuck in programming state! %s %s\n", + if (done) { + pr_err("%s: Card stuck in wrong state! %s %s status: %#x\n", mmc_hostname(card->host), - req->rq_disk->disk_name, __func__); + req->rq_disk->disk_name, __func__, status); return -ETIMEDOUT; } @@ -963,229 +1003,11 @@ static int card_busy_detect(struct mmc_card *card, unsigned int timeout_ms, * so make sure to check both the busy * indication and the card state. */ - } while (!(status & R1_READY_FOR_DATA) || - (R1_CURRENT_STATE(status) == R1_STATE_PRG)); + } while (!mmc_blk_in_tran_state(status)); return err; } -static int send_stop(struct mmc_card *card, unsigned int timeout_ms, - struct request *req, bool *gen_err, u32 *stop_status) -{ - struct mmc_host *host = card->host; - struct mmc_command cmd = {}; - int err; - bool use_r1b_resp = rq_data_dir(req) == WRITE; - - /* - * Normally we use R1B responses for WRITE, but in cases where the host - * has specified a max_busy_timeout we need to validate it. A failure - * means we need to prevent the host from doing hw busy detection, which - * is done by converting to a R1 response instead. - */ - if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout)) - use_r1b_resp = false; - - cmd.opcode = MMC_STOP_TRANSMISSION; - if (use_r1b_resp) { - cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; - cmd.busy_timeout = timeout_ms; - } else { - cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; - } - - err = mmc_wait_for_cmd(host, &cmd, 5); - if (err) - return err; - - *stop_status = cmd.resp[0]; - - /* No need to check card status in case of READ. */ - if (rq_data_dir(req) == READ) - return 0; - - if (!mmc_host_is_spi(host) && - (*stop_status & R1_ERROR)) { - pr_err("%s: %s: general error sending stop command, resp %#x\n", - req->rq_disk->disk_name, __func__, *stop_status); - *gen_err = true; - } - - return card_busy_detect(card, timeout_ms, use_r1b_resp, req, gen_err); -} - -#define ERR_NOMEDIUM 3 -#define ERR_RETRY 2 -#define ERR_ABORT 1 -#define ERR_CONTINUE 0 - -static int mmc_blk_cmd_error(struct request *req, const char *name, int error, - bool status_valid, u32 status) -{ - switch (error) { - case -EILSEQ: - /* response crc error, retry the r/w cmd */ - pr_err("%s: %s sending %s command, card status %#x\n", - req->rq_disk->disk_name, "response CRC error", - name, status); - return ERR_RETRY; - - case -ETIMEDOUT: - pr_err("%s: %s sending %s command, card status %#x\n", - req->rq_disk->disk_name, "timed out", name, status); - - /* If the status cmd initially failed, retry the r/w cmd */ - if (!status_valid) { - pr_err("%s: status not valid, retrying timeout\n", - req->rq_disk->disk_name); - return ERR_RETRY; - } - - /* - * If it was a r/w cmd crc error, or illegal command - * (eg, issued in wrong state) then retry - we should - * have corrected the state problem above. - */ - if (status & (R1_COM_CRC_ERROR | R1_ILLEGAL_COMMAND)) { - pr_err("%s: command error, retrying timeout\n", - req->rq_disk->disk_name); - return ERR_RETRY; - } - - /* Otherwise abort the command */ - return ERR_ABORT; - - default: - /* We don't understand the error code the driver gave us */ - pr_err("%s: unknown error %d sending read/write command, card status %#x\n", - req->rq_disk->disk_name, error, status); - return ERR_ABORT; - } -} - -/* - * Initial r/w and stop cmd error recovery. - * We don't know whether the card received the r/w cmd or not, so try to - * restore things back to a sane state. Essentially, we do this as follows: - * - Obtain card status. If the first attempt to obtain card status fails, - * the status word will reflect the failed status cmd, not the failed - * r/w cmd. If we fail to obtain card status, it suggests we can no - * longer communicate with the card. - * - Check the card state. If the card received the cmd but there was a - * transient problem with the response, it might still be in a data transfer - * mode. Try to send it a stop command. If this fails, we can't recover. - * - If the r/w cmd failed due to a response CRC error, it was probably - * transient, so retry the cmd. - * - If the r/w cmd timed out, but we didn't get the r/w cmd status, retry. - * - If the r/w cmd timed out, and the r/w cmd failed due to CRC error or - * illegal cmd, retry. - * Otherwise we don't understand what happened, so abort. - */ -static int mmc_blk_cmd_recovery(struct mmc_card *card, struct request *req, - struct mmc_blk_request *brq, bool *ecc_err, bool *gen_err) -{ - bool prev_cmd_status_valid = true; - u32 status, stop_status = 0; - int err, retry; - - if (mmc_card_removed(card)) - return ERR_NOMEDIUM; - - /* - * Try to get card status which indicates both the card state - * and why there was no response. If the first attempt fails, - * we can't be sure the returned status is for the r/w command. - */ - for (retry = 2; retry >= 0; retry--) { - err = __mmc_send_status(card, &status, 0); - if (!err) - break; - - /* Re-tune if needed */ - mmc_retune_recheck(card->host); - - prev_cmd_status_valid = false; - pr_err("%s: error %d sending status command, %sing\n", - req->rq_disk->disk_name, err, retry ? "retry" : "abort"); - } - - /* We couldn't get a response from the card. Give up. */ - if (err) { - /* Check if the card is removed */ - if (mmc_detect_card_removed(card->host)) - return ERR_NOMEDIUM; - return ERR_ABORT; - } - - /* Flag ECC errors */ - if ((status & R1_CARD_ECC_FAILED) || - (brq->stop.resp[0] & R1_CARD_ECC_FAILED) || - (brq->cmd.resp[0] & R1_CARD_ECC_FAILED)) - *ecc_err = true; - - /* Flag General errors */ - if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) - if ((status & R1_ERROR) || - (brq->stop.resp[0] & R1_ERROR)) { - pr_err("%s: %s: general error sending stop or status command, stop cmd response %#x, card status %#x\n", - req->rq_disk->disk_name, __func__, - brq->stop.resp[0], status); - *gen_err = true; - } - - /* - * Check the current card state. If it is in some data transfer - * mode, tell it to stop (and hopefully transition back to TRAN.) - */ - if (R1_CURRENT_STATE(status) == R1_STATE_DATA || - R1_CURRENT_STATE(status) == R1_STATE_RCV) { - err = send_stop(card, - DIV_ROUND_UP(brq->data.timeout_ns, 1000000), - req, gen_err, &stop_status); - if (err) { - pr_err("%s: error %d sending stop command\n", - req->rq_disk->disk_name, err); - /* - * If the stop cmd also timed out, the card is probably - * not present, so abort. Other errors are bad news too. - */ - return ERR_ABORT; - } - - if (stop_status & R1_CARD_ECC_FAILED) - *ecc_err = true; - } - - /* Check for set block count errors */ - if (brq->sbc.error) - return mmc_blk_cmd_error(req, "SET_BLOCK_COUNT", brq->sbc.error, - prev_cmd_status_valid, status); - - /* Check for r/w command errors */ - if (brq->cmd.error) - return mmc_blk_cmd_error(req, "r/w cmd", brq->cmd.error, - prev_cmd_status_valid, status); - - /* Data errors */ - if (!brq->stop.error) - return ERR_CONTINUE; - - /* Now for stop errors. These aren't fatal to the transfer. */ - pr_info("%s: error %d sending stop command, original cmd response %#x, card status %#x\n", - req->rq_disk->disk_name, brq->stop.error, - brq->cmd.resp[0], status); - - /* - * Subsitute in our own stop status as this will give the error - * state which happened during the execution of the r/w command. - */ - if (stop_status) { - brq->stop.resp[0] = stop_status; - brq->stop.error = 0; - } - return ERR_CONTINUE; -} - static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host, int type) { @@ -1281,7 +1103,7 @@ static void mmc_blk_issue_drv_op(struct mmc_queue *mq, struct request *req) break; } mq_rq->drv_op_result = ret; - blk_end_request_all(req, ret ? BLK_STS_IOERR : BLK_STS_OK); + blk_mq_end_request(req, ret ? BLK_STS_IOERR : BLK_STS_OK); } static void mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req) @@ -1324,7 +1146,7 @@ static void mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req) else mmc_blk_reset_success(md, type); fail: - blk_end_request(req, status, blk_rq_bytes(req)); + blk_mq_end_request(req, status); } static void mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq, @@ -1394,7 +1216,7 @@ out_retry: if (!err) mmc_blk_reset_success(md, type); out: - blk_end_request(req, status, blk_rq_bytes(req)); + blk_mq_end_request(req, status); } static void mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req) @@ -1404,7 +1226,7 @@ static void mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req) int ret = 0; ret = mmc_flush_cache(card); - blk_end_request_all(req, ret ? BLK_STS_IOERR : BLK_STS_OK); + blk_mq_end_request(req, ret ? BLK_STS_IOERR : BLK_STS_OK); } /* @@ -1430,15 +1252,18 @@ static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq, } } -#define CMD_ERRORS \ - (R1_OUT_OF_RANGE | /* Command argument out of range */ \ - R1_ADDRESS_ERROR | /* Misaligned address */ \ +#define CMD_ERRORS_EXCL_OOR \ + (R1_ADDRESS_ERROR | /* Misaligned address */ \ R1_BLOCK_LEN_ERROR | /* Transferred block length incorrect */\ R1_WP_VIOLATION | /* Tried to write to protected block */ \ R1_CARD_ECC_FAILED | /* Card ECC failed */ \ R1_CC_ERROR | /* Card controller error */ \ R1_ERROR) /* General/unknown error */ +#define CMD_ERRORS \ + (CMD_ERRORS_EXCL_OOR | \ + R1_OUT_OF_RANGE) /* Command argument out of range */ \ + static void mmc_blk_eval_resp_error(struct mmc_blk_request *brq) { u32 val; @@ -1481,116 +1306,6 @@ static void mmc_blk_eval_resp_error(struct mmc_blk_request *brq) } } -static enum mmc_blk_status mmc_blk_err_check(struct mmc_card *card, - struct mmc_async_req *areq) -{ - struct mmc_queue_req *mq_mrq = container_of(areq, struct mmc_queue_req, - areq); - struct mmc_blk_request *brq = &mq_mrq->brq; - struct request *req = mmc_queue_req_to_req(mq_mrq); - int need_retune = card->host->need_retune; - bool ecc_err = false; - bool gen_err = false; - - /* - * sbc.error indicates a problem with the set block count - * command. No data will have been transferred. - * - * cmd.error indicates a problem with the r/w command. No - * data will have been transferred. - * - * stop.error indicates a problem with the stop command. Data - * may have been transferred, or may still be transferring. - */ - - mmc_blk_eval_resp_error(brq); - - if (brq->sbc.error || brq->cmd.error || - brq->stop.error || brq->data.error) { - switch (mmc_blk_cmd_recovery(card, req, brq, &ecc_err, &gen_err)) { - case ERR_RETRY: - return MMC_BLK_RETRY; - case ERR_ABORT: - return MMC_BLK_ABORT; - case ERR_NOMEDIUM: - return MMC_BLK_NOMEDIUM; - case ERR_CONTINUE: - break; - } - } - - /* - * Check for errors relating to the execution of the - * initial command - such as address errors. No data - * has been transferred. - */ - if (brq->cmd.resp[0] & CMD_ERRORS) { - pr_err("%s: r/w command failed, status = %#x\n", - req->rq_disk->disk_name, brq->cmd.resp[0]); - return MMC_BLK_ABORT; - } - - /* - * Everything else is either success, or a data error of some - * kind. If it was a write, we may have transitioned to - * program mode, which we have to wait for it to complete. - */ - if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) { - int err; - - /* Check stop command response */ - if (brq->stop.resp[0] & R1_ERROR) { - pr_err("%s: %s: general error sending stop command, stop cmd response %#x\n", - req->rq_disk->disk_name, __func__, - brq->stop.resp[0]); - gen_err = true; - } - - err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, false, req, - &gen_err); - if (err) - return MMC_BLK_CMD_ERR; - } - - /* if general error occurs, retry the write operation. */ - if (gen_err) { - pr_warn("%s: retrying write for general error\n", - req->rq_disk->disk_name); - return MMC_BLK_RETRY; - } - - /* Some errors (ECC) are flagged on the next commmand, so check stop, too */ - if (brq->data.error || brq->stop.error) { - if (need_retune && !brq->retune_retry_done) { - pr_debug("%s: retrying because a re-tune was needed\n", - req->rq_disk->disk_name); - brq->retune_retry_done = 1; - return MMC_BLK_RETRY; - } - pr_err("%s: error %d transferring data, sector %u, nr %u, cmd response %#x, card status %#x\n", - req->rq_disk->disk_name, brq->data.error ?: brq->stop.error, - (unsigned)blk_rq_pos(req), - (unsigned)blk_rq_sectors(req), - brq->cmd.resp[0], brq->stop.resp[0]); - - if (rq_data_dir(req) == READ) { - if (ecc_err) - return MMC_BLK_ECC_ERR; - return MMC_BLK_DATA_ERR; - } else { - return MMC_BLK_CMD_ERR; - } - } - - if (!brq->data.bytes_xfered) - return MMC_BLK_RETRY; - - if (blk_rq_bytes(req) != brq->data.bytes_xfered) - return MMC_BLK_PARTIAL; - - return MMC_BLK_SUCCESS; -} - static void mmc_blk_data_prep(struct mmc_queue *mq, struct mmc_queue_req *mqrq, int disable_multi, bool *do_rel_wr_p, bool *do_data_tag_p) @@ -1706,8 +1421,6 @@ static void mmc_blk_data_prep(struct mmc_queue *mq, struct mmc_queue_req *mqrq, brq->data.sg_len = i; } - mqrq->areq.mrq = &brq->mrq; - if (do_rel_wr_p) *do_rel_wr_p = do_rel_wr; @@ -1715,6 +1428,138 @@ static void mmc_blk_data_prep(struct mmc_queue *mq, struct mmc_queue_req *mqrq, *do_data_tag_p = do_data_tag; } +#define MMC_CQE_RETRIES 2 + +static void mmc_blk_cqe_complete_rq(struct mmc_queue *mq, struct request *req) +{ + struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); + struct mmc_request *mrq = &mqrq->brq.mrq; + struct request_queue *q = req->q; + struct mmc_host *host = mq->card->host; + unsigned long flags; + bool put_card; + int err; + + mmc_cqe_post_req(host, mrq); + + if (mrq->cmd && mrq->cmd->error) + err = mrq->cmd->error; + else if (mrq->data && mrq->data->error) + err = mrq->data->error; + else + err = 0; + + if (err) { + if (mqrq->retries++ < MMC_CQE_RETRIES) + blk_mq_requeue_request(req, true); + else + blk_mq_end_request(req, BLK_STS_IOERR); + } else if (mrq->data) { + if (blk_update_request(req, BLK_STS_OK, mrq->data->bytes_xfered)) + blk_mq_requeue_request(req, true); + else + __blk_mq_end_request(req, BLK_STS_OK); + } else { + blk_mq_end_request(req, BLK_STS_OK); + } + + spin_lock_irqsave(q->queue_lock, flags); + + mq->in_flight[mmc_issue_type(mq, req)] -= 1; + + put_card = (mmc_tot_in_flight(mq) == 0); + + mmc_cqe_check_busy(mq); + + spin_unlock_irqrestore(q->queue_lock, flags); + + if (!mq->cqe_busy) + blk_mq_run_hw_queues(q, true); + + if (put_card) + mmc_put_card(mq->card, &mq->ctx); +} + +void mmc_blk_cqe_recovery(struct mmc_queue *mq) +{ + struct mmc_card *card = mq->card; + struct mmc_host *host = card->host; + int err; + + pr_debug("%s: CQE recovery start\n", mmc_hostname(host)); + + err = mmc_cqe_recovery(host); + if (err) + mmc_blk_reset(mq->blkdata, host, MMC_BLK_CQE_RECOVERY); + else + mmc_blk_reset_success(mq->blkdata, MMC_BLK_CQE_RECOVERY); + + pr_debug("%s: CQE recovery done\n", mmc_hostname(host)); +} + +static void mmc_blk_cqe_req_done(struct mmc_request *mrq) +{ + struct mmc_queue_req *mqrq = container_of(mrq, struct mmc_queue_req, + brq.mrq); + struct request *req = mmc_queue_req_to_req(mqrq); + struct request_queue *q = req->q; + struct mmc_queue *mq = q->queuedata; + + /* + * Block layer timeouts race with completions which means the normal + * completion path cannot be used during recovery. + */ + if (mq->in_recovery) + mmc_blk_cqe_complete_rq(mq, req); + else + blk_mq_complete_request(req); +} + +static int mmc_blk_cqe_start_req(struct mmc_host *host, struct mmc_request *mrq) +{ + mrq->done = mmc_blk_cqe_req_done; + mrq->recovery_notifier = mmc_cqe_recovery_notifier; + + return mmc_cqe_start_req(host, mrq); +} + +static struct mmc_request *mmc_blk_cqe_prep_dcmd(struct mmc_queue_req *mqrq, + struct request *req) +{ + struct mmc_blk_request *brq = &mqrq->brq; + + memset(brq, 0, sizeof(*brq)); + + brq->mrq.cmd = &brq->cmd; + brq->mrq.tag = req->tag; + + return &brq->mrq; +} + +static int mmc_blk_cqe_issue_flush(struct mmc_queue *mq, struct request *req) +{ + struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); + struct mmc_request *mrq = mmc_blk_cqe_prep_dcmd(mqrq, req); + + mrq->cmd->opcode = MMC_SWITCH; + mrq->cmd->arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) | + (EXT_CSD_FLUSH_CACHE << 16) | + (1 << 8) | + EXT_CSD_CMD_SET_NORMAL; + mrq->cmd->flags = MMC_CMD_AC | MMC_RSP_R1B; + + return mmc_blk_cqe_start_req(mq->card->host, mrq); +} + +static int mmc_blk_cqe_issue_rw_rq(struct mmc_queue *mq, struct request *req) +{ + struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); + + mmc_blk_data_prep(mq, mqrq, 0, NULL, NULL); + + return mmc_blk_cqe_start_req(mq->card->host, &mqrq->brq.mrq); +} + static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq, struct mmc_card *card, int disable_multi, @@ -1779,318 +1624,637 @@ static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq, brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC; brq->mrq.sbc = &brq->sbc; } +} + +#define MMC_MAX_RETRIES 5 +#define MMC_DATA_RETRIES 2 +#define MMC_NO_RETRIES (MMC_MAX_RETRIES + 1) - mqrq->areq.err_check = mmc_blk_err_check; +static int mmc_blk_send_stop(struct mmc_card *card, unsigned int timeout) +{ + struct mmc_command cmd = { + .opcode = MMC_STOP_TRANSMISSION, + .flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC, + /* Some hosts wait for busy anyway, so provide a busy timeout */ + .busy_timeout = timeout, + }; + + return mmc_wait_for_cmd(card->host, &cmd, 5); } -static bool mmc_blk_rw_cmd_err(struct mmc_blk_data *md, struct mmc_card *card, - struct mmc_blk_request *brq, struct request *req, - bool old_req_pending) +static int mmc_blk_fix_state(struct mmc_card *card, struct request *req) { - bool req_pending; + struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); + struct mmc_blk_request *brq = &mqrq->brq; + unsigned int timeout = mmc_blk_data_timeout_ms(card->host, &brq->data); + int err; - /* - * If this is an SD card and we're writing, we can first - * mark the known good sectors as ok. - * - * If the card is not SD, we can still ok written sectors - * as reported by the controller (which might be less than - * the real number of written sectors, but never more). - */ - if (mmc_card_sd(card)) { - u32 blocks; + mmc_retune_hold_now(card->host); + + mmc_blk_send_stop(card, timeout); + + err = card_busy_detect(card, timeout, req, NULL); + + mmc_retune_release(card->host); + + return err; +} + +#define MMC_READ_SINGLE_RETRIES 2 + +/* Single sector read during recovery */ +static void mmc_blk_read_single(struct mmc_queue *mq, struct request *req) +{ + struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); + struct mmc_request *mrq = &mqrq->brq.mrq; + struct mmc_card *card = mq->card; + struct mmc_host *host = card->host; + blk_status_t error = BLK_STS_OK; + int retries = 0; + + do { + u32 status; int err; - err = mmc_sd_num_wr_blocks(card, &blocks); + mmc_blk_rw_rq_prep(mqrq, card, 1, mq); + + mmc_wait_for_req(host, mrq); + + err = mmc_send_status(card, &status); if (err) - req_pending = old_req_pending; + goto error_exit; + + if (!mmc_host_is_spi(host) && + !mmc_blk_in_tran_state(status)) { + err = mmc_blk_fix_state(card, req); + if (err) + goto error_exit; + } + + if (mrq->cmd->error && retries++ < MMC_READ_SINGLE_RETRIES) + continue; + + retries = 0; + + if (mrq->cmd->error || + mrq->data->error || + (!mmc_host_is_spi(host) && + (mrq->cmd->resp[0] & CMD_ERRORS || status & CMD_ERRORS))) + error = BLK_STS_IOERR; else - req_pending = blk_end_request(req, BLK_STS_OK, blocks << 9); - } else { - req_pending = blk_end_request(req, BLK_STS_OK, brq->data.bytes_xfered); - } - return req_pending; + error = BLK_STS_OK; + + } while (blk_update_request(req, error, 512)); + + return; + +error_exit: + mrq->data->bytes_xfered = 0; + blk_update_request(req, BLK_STS_IOERR, 512); + /* Let it try the remaining request again */ + if (mqrq->retries > MMC_MAX_RETRIES - 1) + mqrq->retries = MMC_MAX_RETRIES - 1; } -static void mmc_blk_rw_cmd_abort(struct mmc_queue *mq, struct mmc_card *card, - struct request *req, - struct mmc_queue_req *mqrq) +static inline bool mmc_blk_oor_valid(struct mmc_blk_request *brq) { - if (mmc_card_removed(card)) - req->rq_flags |= RQF_QUIET; - while (blk_end_request(req, BLK_STS_IOERR, blk_rq_cur_bytes(req))); - mq->qcnt--; + return !!brq->mrq.sbc; } -/** - * mmc_blk_rw_try_restart() - tries to restart the current async request - * @mq: the queue with the card and host to restart - * @req: a new request that want to be started after the current one +static inline u32 mmc_blk_stop_err_bits(struct mmc_blk_request *brq) +{ + return mmc_blk_oor_valid(brq) ? CMD_ERRORS : CMD_ERRORS_EXCL_OOR; +} + +/* + * Check for errors the host controller driver might not have seen such as + * response mode errors or invalid card state. + */ +static bool mmc_blk_status_error(struct request *req, u32 status) +{ + struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); + struct mmc_blk_request *brq = &mqrq->brq; + struct mmc_queue *mq = req->q->queuedata; + u32 stop_err_bits; + + if (mmc_host_is_spi(mq->card->host)) + return false; + + stop_err_bits = mmc_blk_stop_err_bits(brq); + + return brq->cmd.resp[0] & CMD_ERRORS || + brq->stop.resp[0] & stop_err_bits || + status & stop_err_bits || + (rq_data_dir(req) == WRITE && !mmc_blk_in_tran_state(status)); +} + +static inline bool mmc_blk_cmd_started(struct mmc_blk_request *brq) +{ + return !brq->sbc.error && !brq->cmd.error && + !(brq->cmd.resp[0] & CMD_ERRORS); +} + +/* + * Requests are completed by mmc_blk_mq_complete_rq() which sets simple + * policy: + * 1. A request that has transferred at least some data is considered + * successful and will be requeued if there is remaining data to + * transfer. + * 2. Otherwise the number of retries is incremented and the request + * will be requeued if there are remaining retries. + * 3. Otherwise the request will be errored out. + * That means mmc_blk_mq_complete_rq() is controlled by bytes_xfered and + * mqrq->retries. So there are only 4 possible actions here: + * 1. do not accept the bytes_xfered value i.e. set it to zero + * 2. change mqrq->retries to determine the number of retries + * 3. try to reset the card + * 4. read one sector at a time */ -static void mmc_blk_rw_try_restart(struct mmc_queue *mq, struct request *req, - struct mmc_queue_req *mqrq) +static void mmc_blk_mq_rw_recovery(struct mmc_queue *mq, struct request *req) { - if (!req) + int type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE; + struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); + struct mmc_blk_request *brq = &mqrq->brq; + struct mmc_blk_data *md = mq->blkdata; + struct mmc_card *card = mq->card; + u32 status; + u32 blocks; + int err; + + /* + * Some errors the host driver might not have seen. Set the number of + * bytes transferred to zero in that case. + */ + err = __mmc_send_status(card, &status, 0); + if (err || mmc_blk_status_error(req, status)) + brq->data.bytes_xfered = 0; + + mmc_retune_release(card->host); + + /* + * Try again to get the status. This also provides an opportunity for + * re-tuning. + */ + if (err) + err = __mmc_send_status(card, &status, 0); + + /* + * Nothing more to do after the number of bytes transferred has been + * updated and there is no card. + */ + if (err && mmc_detect_card_removed(card->host)) return; + /* Try to get back to "tran" state */ + if (!mmc_host_is_spi(mq->card->host) && + (err || !mmc_blk_in_tran_state(status))) + err = mmc_blk_fix_state(mq->card, req); + /* - * If the card was removed, just cancel everything and return. + * Special case for SD cards where the card might record the number of + * blocks written. */ - if (mmc_card_removed(mq->card)) { - req->rq_flags |= RQF_QUIET; - blk_end_request_all(req, BLK_STS_IOERR); - mq->qcnt--; /* FIXME: just set to 0? */ + if (!err && mmc_blk_cmd_started(brq) && mmc_card_sd(card) && + rq_data_dir(req) == WRITE) { + if (mmc_sd_num_wr_blocks(card, &blocks)) + brq->data.bytes_xfered = 0; + else + brq->data.bytes_xfered = blocks << 9; + } + + /* Reset if the card is in a bad state */ + if (!mmc_host_is_spi(mq->card->host) && + err && mmc_blk_reset(md, card->host, type)) { + pr_err("%s: recovery failed!\n", req->rq_disk->disk_name); + mqrq->retries = MMC_NO_RETRIES; + return; + } + + /* + * If anything was done, just return and if there is anything remaining + * on the request it will get requeued. + */ + if (brq->data.bytes_xfered) + return; + + /* Reset before last retry */ + if (mqrq->retries + 1 == MMC_MAX_RETRIES) + mmc_blk_reset(md, card->host, type); + + /* Command errors fail fast, so use all MMC_MAX_RETRIES */ + if (brq->sbc.error || brq->cmd.error) + return; + + /* Reduce the remaining retries for data errors */ + if (mqrq->retries < MMC_MAX_RETRIES - MMC_DATA_RETRIES) { + mqrq->retries = MMC_MAX_RETRIES - MMC_DATA_RETRIES; + return; + } + + /* FIXME: Missing single sector read for large sector size */ + if (!mmc_large_sector(card) && rq_data_dir(req) == READ && + brq->data.blocks > 1) { + /* Read one sector at a time */ + mmc_blk_read_single(mq, req); return; } - /* Else proceed and try to restart the current async request */ - mmc_blk_rw_rq_prep(mqrq, mq->card, 0, mq); - mmc_start_areq(mq->card->host, &mqrq->areq, NULL); } -static void mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *new_req) +static inline bool mmc_blk_rq_error(struct mmc_blk_request *brq) { - struct mmc_blk_data *md = mq->blkdata; - struct mmc_card *card = md->queue.card; - struct mmc_blk_request *brq; - int disable_multi = 0, retry = 0, type, retune_retry_done = 0; - enum mmc_blk_status status; - struct mmc_queue_req *mqrq_cur = NULL; - struct mmc_queue_req *mq_rq; - struct request *old_req; - struct mmc_async_req *new_areq; - struct mmc_async_req *old_areq; - bool req_pending = true; + mmc_blk_eval_resp_error(brq); + + return brq->sbc.error || brq->cmd.error || brq->stop.error || + brq->data.error || brq->cmd.resp[0] & CMD_ERRORS; +} + +static int mmc_blk_card_busy(struct mmc_card *card, struct request *req) +{ + struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); + u32 status = 0; + int err; + + if (mmc_host_is_spi(card->host) || rq_data_dir(req) == READ) + return 0; + + err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, req, &status); + + /* + * Do not assume data transferred correctly if there are any error bits + * set. + */ + if (status & mmc_blk_stop_err_bits(&mqrq->brq)) { + mqrq->brq.data.bytes_xfered = 0; + err = err ? err : -EIO; + } + + /* Copy the exception bit so it will be seen later on */ + if (mmc_card_mmc(card) && status & R1_EXCEPTION_EVENT) + mqrq->brq.cmd.resp[0] |= R1_EXCEPTION_EVENT; + + return err; +} - if (new_req) { - mqrq_cur = req_to_mmc_queue_req(new_req); - mq->qcnt++; +static inline void mmc_blk_rw_reset_success(struct mmc_queue *mq, + struct request *req) +{ + int type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE; + + mmc_blk_reset_success(mq->blkdata, type); +} + +static void mmc_blk_mq_complete_rq(struct mmc_queue *mq, struct request *req) +{ + struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); + unsigned int nr_bytes = mqrq->brq.data.bytes_xfered; + + if (nr_bytes) { + if (blk_update_request(req, BLK_STS_OK, nr_bytes)) + blk_mq_requeue_request(req, true); + else + __blk_mq_end_request(req, BLK_STS_OK); + } else if (!blk_rq_bytes(req)) { + __blk_mq_end_request(req, BLK_STS_IOERR); + } else if (mqrq->retries++ < MMC_MAX_RETRIES) { + blk_mq_requeue_request(req, true); + } else { + if (mmc_card_removed(mq->card)) + req->rq_flags |= RQF_QUIET; + blk_mq_end_request(req, BLK_STS_IOERR); + } +} + +static bool mmc_blk_urgent_bkops_needed(struct mmc_queue *mq, + struct mmc_queue_req *mqrq) +{ + return mmc_card_mmc(mq->card) && !mmc_host_is_spi(mq->card->host) && + (mqrq->brq.cmd.resp[0] & R1_EXCEPTION_EVENT || + mqrq->brq.stop.resp[0] & R1_EXCEPTION_EVENT); +} + +static void mmc_blk_urgent_bkops(struct mmc_queue *mq, + struct mmc_queue_req *mqrq) +{ + if (mmc_blk_urgent_bkops_needed(mq, mqrq)) + mmc_start_bkops(mq->card, true); +} + +void mmc_blk_mq_complete(struct request *req) +{ + struct mmc_queue *mq = req->q->queuedata; + + if (mq->use_cqe) + mmc_blk_cqe_complete_rq(mq, req); + else + mmc_blk_mq_complete_rq(mq, req); +} + +static void mmc_blk_mq_poll_completion(struct mmc_queue *mq, + struct request *req) +{ + struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); + struct mmc_host *host = mq->card->host; + + if (mmc_blk_rq_error(&mqrq->brq) || + mmc_blk_card_busy(mq->card, req)) { + mmc_blk_mq_rw_recovery(mq, req); + } else { + mmc_blk_rw_reset_success(mq, req); + mmc_retune_release(host); + } + + mmc_blk_urgent_bkops(mq, mqrq); +} + +static void mmc_blk_mq_dec_in_flight(struct mmc_queue *mq, struct request *req) +{ + struct request_queue *q = req->q; + unsigned long flags; + bool put_card; + + spin_lock_irqsave(q->queue_lock, flags); + + mq->in_flight[mmc_issue_type(mq, req)] -= 1; + + put_card = (mmc_tot_in_flight(mq) == 0); + + spin_unlock_irqrestore(q->queue_lock, flags); + + if (put_card) + mmc_put_card(mq->card, &mq->ctx); +} + +static void mmc_blk_mq_post_req(struct mmc_queue *mq, struct request *req) +{ + struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); + struct mmc_request *mrq = &mqrq->brq.mrq; + struct mmc_host *host = mq->card->host; + + mmc_post_req(host, mrq, 0); + + /* + * Block layer timeouts race with completions which means the normal + * completion path cannot be used during recovery. + */ + if (mq->in_recovery) + mmc_blk_mq_complete_rq(mq, req); + else + blk_mq_complete_request(req); + + mmc_blk_mq_dec_in_flight(mq, req); +} + +void mmc_blk_mq_recovery(struct mmc_queue *mq) +{ + struct request *req = mq->recovery_req; + struct mmc_host *host = mq->card->host; + struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); + + mq->recovery_req = NULL; + mq->rw_wait = false; + + if (mmc_blk_rq_error(&mqrq->brq)) { + mmc_retune_hold_now(host); + mmc_blk_mq_rw_recovery(mq, req); } - if (!mq->qcnt) + mmc_blk_urgent_bkops(mq, mqrq); + + mmc_blk_mq_post_req(mq, req); +} + +static void mmc_blk_mq_complete_prev_req(struct mmc_queue *mq, + struct request **prev_req) +{ + if (mmc_host_done_complete(mq->card->host)) return; - do { - if (new_req) { - /* - * When 4KB native sector is enabled, only 8 blocks - * multiple read or write is allowed - */ - if (mmc_large_sector(card) && - !IS_ALIGNED(blk_rq_sectors(new_req), 8)) { - pr_err("%s: Transfer size is not 4KB sector size aligned\n", - new_req->rq_disk->disk_name); - mmc_blk_rw_cmd_abort(mq, card, new_req, mqrq_cur); - return; - } + mutex_lock(&mq->complete_lock); - mmc_blk_rw_rq_prep(mqrq_cur, card, 0, mq); - new_areq = &mqrq_cur->areq; - } else - new_areq = NULL; + if (!mq->complete_req) + goto out_unlock; - old_areq = mmc_start_areq(card->host, new_areq, &status); - if (!old_areq) { - /* - * We have just put the first request into the pipeline - * and there is nothing more to do until it is - * complete. - */ - return; - } + mmc_blk_mq_poll_completion(mq, mq->complete_req); + + if (prev_req) + *prev_req = mq->complete_req; + else + mmc_blk_mq_post_req(mq, mq->complete_req); + + mq->complete_req = NULL; + +out_unlock: + mutex_unlock(&mq->complete_lock); +} + +void mmc_blk_mq_complete_work(struct work_struct *work) +{ + struct mmc_queue *mq = container_of(work, struct mmc_queue, + complete_work); + + mmc_blk_mq_complete_prev_req(mq, NULL); +} + +static void mmc_blk_mq_req_done(struct mmc_request *mrq) +{ + struct mmc_queue_req *mqrq = container_of(mrq, struct mmc_queue_req, + brq.mrq); + struct request *req = mmc_queue_req_to_req(mqrq); + struct request_queue *q = req->q; + struct mmc_queue *mq = q->queuedata; + struct mmc_host *host = mq->card->host; + unsigned long flags; + + if (!mmc_host_done_complete(host)) { + bool waiting; /* - * An asynchronous request has been completed and we proceed - * to handle the result of it. + * We cannot complete the request in this context, so record + * that there is a request to complete, and that a following + * request does not need to wait (although it does need to + * complete complete_req first). */ - mq_rq = container_of(old_areq, struct mmc_queue_req, areq); - brq = &mq_rq->brq; - old_req = mmc_queue_req_to_req(mq_rq); - type = rq_data_dir(old_req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE; - - switch (status) { - case MMC_BLK_SUCCESS: - case MMC_BLK_PARTIAL: - /* - * A block was successfully transferred. - */ - mmc_blk_reset_success(md, type); + spin_lock_irqsave(q->queue_lock, flags); + mq->complete_req = req; + mq->rw_wait = false; + waiting = mq->waiting; + spin_unlock_irqrestore(q->queue_lock, flags); - req_pending = blk_end_request(old_req, BLK_STS_OK, - brq->data.bytes_xfered); - /* - * If the blk_end_request function returns non-zero even - * though all data has been transferred and no errors - * were returned by the host controller, it's a bug. - */ - if (status == MMC_BLK_SUCCESS && req_pending) { - pr_err("%s BUG rq_tot %d d_xfer %d\n", - __func__, blk_rq_bytes(old_req), - brq->data.bytes_xfered); - mmc_blk_rw_cmd_abort(mq, card, old_req, mq_rq); - return; - } - break; - case MMC_BLK_CMD_ERR: - req_pending = mmc_blk_rw_cmd_err(md, card, brq, old_req, req_pending); - if (mmc_blk_reset(md, card->host, type)) { - if (req_pending) - mmc_blk_rw_cmd_abort(mq, card, old_req, mq_rq); - else - mq->qcnt--; - mmc_blk_rw_try_restart(mq, new_req, mqrq_cur); - return; - } - if (!req_pending) { - mq->qcnt--; - mmc_blk_rw_try_restart(mq, new_req, mqrq_cur); - return; - } - break; - case MMC_BLK_RETRY: - retune_retry_done = brq->retune_retry_done; - if (retry++ < 5) - break; - /* Fall through */ - case MMC_BLK_ABORT: - if (!mmc_blk_reset(md, card->host, type)) - break; - mmc_blk_rw_cmd_abort(mq, card, old_req, mq_rq); - mmc_blk_rw_try_restart(mq, new_req, mqrq_cur); - return; - case MMC_BLK_DATA_ERR: { - int err; - - err = mmc_blk_reset(md, card->host, type); - if (!err) - break; - if (err == -ENODEV) { - mmc_blk_rw_cmd_abort(mq, card, old_req, mq_rq); - mmc_blk_rw_try_restart(mq, new_req, mqrq_cur); - return; - } - /* Fall through */ - } - case MMC_BLK_ECC_ERR: - if (brq->data.blocks > 1) { - /* Redo read one sector at a time */ - pr_warn("%s: retrying using single block read\n", - old_req->rq_disk->disk_name); - disable_multi = 1; - break; - } - /* - * After an error, we redo I/O one sector at a - * time, so we only reach here after trying to - * read a single sector. - */ - req_pending = blk_end_request(old_req, BLK_STS_IOERR, - brq->data.blksz); - if (!req_pending) { - mq->qcnt--; - mmc_blk_rw_try_restart(mq, new_req, mqrq_cur); - return; - } - break; - case MMC_BLK_NOMEDIUM: - mmc_blk_rw_cmd_abort(mq, card, old_req, mq_rq); - mmc_blk_rw_try_restart(mq, new_req, mqrq_cur); - return; - default: - pr_err("%s: Unhandled return value (%d)", - old_req->rq_disk->disk_name, status); - mmc_blk_rw_cmd_abort(mq, card, old_req, mq_rq); - mmc_blk_rw_try_restart(mq, new_req, mqrq_cur); - return; - } + /* + * If 'waiting' then the waiting task will complete this + * request, otherwise queue a work to do it. Note that + * complete_work may still race with the dispatch of a following + * request. + */ + if (waiting) + wake_up(&mq->wait); + else + kblockd_schedule_work(&mq->complete_work); - if (req_pending) { - /* - * In case of a incomplete request - * prepare it again and resend. - */ - mmc_blk_rw_rq_prep(mq_rq, card, - disable_multi, mq); - mmc_start_areq(card->host, - &mq_rq->areq, NULL); - mq_rq->brq.retune_retry_done = retune_retry_done; - } - } while (req_pending); + return; + } + + /* Take the recovery path for errors or urgent background operations */ + if (mmc_blk_rq_error(&mqrq->brq) || + mmc_blk_urgent_bkops_needed(mq, mqrq)) { + spin_lock_irqsave(q->queue_lock, flags); + mq->recovery_needed = true; + mq->recovery_req = req; + spin_unlock_irqrestore(q->queue_lock, flags); + wake_up(&mq->wait); + schedule_work(&mq->recovery_work); + return; + } + + mmc_blk_rw_reset_success(mq, req); - mq->qcnt--; + mq->rw_wait = false; + wake_up(&mq->wait); + + mmc_blk_mq_post_req(mq, req); } -void mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) +static bool mmc_blk_rw_wait_cond(struct mmc_queue *mq, int *err) +{ + struct request_queue *q = mq->queue; + unsigned long flags; + bool done; + + /* + * Wait while there is another request in progress, but not if recovery + * is needed. Also indicate whether there is a request waiting to start. + */ + spin_lock_irqsave(q->queue_lock, flags); + if (mq->recovery_needed) { + *err = -EBUSY; + done = true; + } else { + done = !mq->rw_wait; + } + mq->waiting = !done; + spin_unlock_irqrestore(q->queue_lock, flags); + + return done; +} + +static int mmc_blk_rw_wait(struct mmc_queue *mq, struct request **prev_req) +{ + int err = 0; + + wait_event(mq->wait, mmc_blk_rw_wait_cond(mq, &err)); + + /* Always complete the previous request if there is one */ + mmc_blk_mq_complete_prev_req(mq, prev_req); + + return err; +} + +static int mmc_blk_mq_issue_rw_rq(struct mmc_queue *mq, + struct request *req) +{ + struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); + struct mmc_host *host = mq->card->host; + struct request *prev_req = NULL; + int err = 0; + + mmc_blk_rw_rq_prep(mqrq, mq->card, 0, mq); + + mqrq->brq.mrq.done = mmc_blk_mq_req_done; + + mmc_pre_req(host, &mqrq->brq.mrq); + + err = mmc_blk_rw_wait(mq, &prev_req); + if (err) + goto out_post_req; + + mq->rw_wait = true; + + err = mmc_start_request(host, &mqrq->brq.mrq); + + if (prev_req) + mmc_blk_mq_post_req(mq, prev_req); + + if (err) + mq->rw_wait = false; + + /* Release re-tuning here where there is no synchronization required */ + if (err || mmc_host_done_complete(host)) + mmc_retune_release(host); + +out_post_req: + if (err) + mmc_post_req(host, &mqrq->brq.mrq, err); + + return err; +} + +static int mmc_blk_wait_for_idle(struct mmc_queue *mq, struct mmc_host *host) +{ + if (mq->use_cqe) + return host->cqe_ops->cqe_wait_for_idle(host); + + return mmc_blk_rw_wait(mq, NULL); +} + +enum mmc_issued mmc_blk_mq_issue_rq(struct mmc_queue *mq, struct request *req) { - int ret; struct mmc_blk_data *md = mq->blkdata; struct mmc_card *card = md->queue.card; - - if (req && !mq->qcnt) - /* claim host only for the first request */ - mmc_get_card(card, NULL); + struct mmc_host *host = card->host; + int ret; ret = mmc_blk_part_switch(card, md->part_type); - if (ret) { - if (req) { - blk_end_request_all(req, BLK_STS_IOERR); - } - goto out; - } + if (ret) + return MMC_REQ_FAILED_TO_START; - if (req) { + switch (mmc_issue_type(mq, req)) { + case MMC_ISSUE_SYNC: + ret = mmc_blk_wait_for_idle(mq, host); + if (ret) + return MMC_REQ_BUSY; switch (req_op(req)) { case REQ_OP_DRV_IN: case REQ_OP_DRV_OUT: - /* - * Complete ongoing async transfer before issuing - * ioctl()s - */ - if (mq->qcnt) - mmc_blk_issue_rw_rq(mq, NULL); mmc_blk_issue_drv_op(mq, req); break; case REQ_OP_DISCARD: - /* - * Complete ongoing async transfer before issuing - * discard. - */ - if (mq->qcnt) - mmc_blk_issue_rw_rq(mq, NULL); mmc_blk_issue_discard_rq(mq, req); break; case REQ_OP_SECURE_ERASE: - /* - * Complete ongoing async transfer before issuing - * secure erase. - */ - if (mq->qcnt) - mmc_blk_issue_rw_rq(mq, NULL); mmc_blk_issue_secdiscard_rq(mq, req); break; case REQ_OP_FLUSH: - /* - * Complete ongoing async transfer before issuing - * flush. - */ - if (mq->qcnt) - mmc_blk_issue_rw_rq(mq, NULL); mmc_blk_issue_flush(mq, req); break; default: - /* Normal request, just issue it */ - mmc_blk_issue_rw_rq(mq, req); - card->host->context_info.is_waiting_last_req = false; + WARN_ON_ONCE(1); + return MMC_REQ_FAILED_TO_START; + } + return MMC_REQ_FINISHED; + case MMC_ISSUE_DCMD: + case MMC_ISSUE_ASYNC: + switch (req_op(req)) { + case REQ_OP_FLUSH: + ret = mmc_blk_cqe_issue_flush(mq, req); break; + case REQ_OP_READ: + case REQ_OP_WRITE: + if (mq->use_cqe) + ret = mmc_blk_cqe_issue_rw_rq(mq, req); + else + ret = mmc_blk_mq_issue_rw_rq(mq, req); + break; + default: + WARN_ON_ONCE(1); + ret = -EINVAL; } - } else { - /* No request, flushing the pipeline with NULL */ - mmc_blk_issue_rw_rq(mq, NULL); - card->host->context_info.is_waiting_last_req = false; + if (!ret) + return MMC_REQ_STARTED; + return ret == -EBUSY ? MMC_REQ_BUSY : MMC_REQ_FAILED_TO_START; + default: + WARN_ON_ONCE(1); + return MMC_REQ_FAILED_TO_START; } - -out: - if (!mq->qcnt) - mmc_put_card(card, NULL); } static inline int mmc_blk_readonly(struct mmc_card *card) @@ -2156,6 +2320,18 @@ static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card, md->queue.blkdata = md; + /* + * Keep an extra reference to the queue so that we can shutdown the + * queue (i.e. call blk_cleanup_queue()) while there are still + * references to the 'md'. The corresponding blk_put_queue() is in + * mmc_blk_put(). + */ + if (!blk_get_queue(md->queue.queue)) { + mmc_cleanup_queue(&md->queue); + ret = -ENODEV; + goto err_putdisk; + } + md->disk->major = MMC_BLOCK_MAJOR; md->disk->first_minor = devidx * perdev_minors; md->disk->fops = &mmc_bdops; @@ -2471,10 +2647,6 @@ static void mmc_blk_remove_req(struct mmc_blk_data *md) * from being accepted. */ card = md->queue.card; - spin_lock_irq(md->queue.queue->queue_lock); - queue_flag_set(QUEUE_FLAG_BYPASS, md->queue.queue); - spin_unlock_irq(md->queue.queue->queue_lock); - blk_set_queue_dying(md->queue.queue); mmc_cleanup_queue(&md->queue); if (md->disk->flags & GENHD_FL_UP) { device_remove_file(disk_to_dev(md->disk), &md->force_ro); @@ -2623,6 +2795,7 @@ static int mmc_ext_csd_open(struct inode *inode, struct file *filp) if (n != EXT_CSD_STR_LEN) { err = -EINVAL; + kfree(ext_csd); goto out_free; } diff --git a/drivers/mmc/core/block.h b/drivers/mmc/core/block.h index 5946636101ef..31153f656f41 100644 --- a/drivers/mmc/core/block.h +++ b/drivers/mmc/core/block.h @@ -5,6 +5,16 @@ struct mmc_queue; struct request; -void mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req); +void mmc_blk_cqe_recovery(struct mmc_queue *mq); + +enum mmc_issued; + +enum mmc_issued mmc_blk_mq_issue_rq(struct mmc_queue *mq, struct request *req); +void mmc_blk_mq_complete(struct request *req); +void mmc_blk_mq_recovery(struct mmc_queue *mq); + +struct work_struct; + +void mmc_blk_mq_complete_work(struct work_struct *work); #endif diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c index 7586ff2ad1f1..fc92c6c1c9a4 100644 --- a/drivers/mmc/core/bus.c +++ b/drivers/mmc/core/bus.c @@ -351,8 +351,6 @@ int mmc_add_card(struct mmc_card *card) #ifdef CONFIG_DEBUG_FS mmc_add_card_debugfs(card); #endif - mmc_init_context_info(card->host); - card->dev.of_node = mmc_of_find_child_device(card->host, 0); device_enable_async_suspend(&card->dev); diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index 1f0f44f4dd5f..c0ba6d8823b7 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -341,6 +341,8 @@ int mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) { int err; + init_completion(&mrq->cmd_completion); + mmc_retune_hold(host); if (mmc_card_removed(host->card)) @@ -361,20 +363,6 @@ int mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) } EXPORT_SYMBOL(mmc_start_request); -/* - * mmc_wait_data_done() - done callback for data request - * @mrq: done data request - * - * Wakes up mmc context, passed as a callback to host controller driver - */ -static void mmc_wait_data_done(struct mmc_request *mrq) -{ - struct mmc_context_info *context_info = &mrq->host->context_info; - - context_info->is_done_rcv = true; - wake_up_interruptible(&context_info->wait); -} - static void mmc_wait_done(struct mmc_request *mrq) { complete(&mrq->completion); @@ -392,37 +380,6 @@ static inline void mmc_wait_ongoing_tfr_cmd(struct mmc_host *host) wait_for_completion(&ongoing_mrq->cmd_completion); } -/* - *__mmc_start_data_req() - starts data request - * @host: MMC host to start the request - * @mrq: data request to start - * - * Sets the done callback to be called when request is completed by the card. - * Starts data mmc request execution - * If an ongoing transfer is already in progress, wait for the command line - * to become available before sending another command. - */ -static int __mmc_start_data_req(struct mmc_host *host, struct mmc_request *mrq) -{ - int err; - - mmc_wait_ongoing_tfr_cmd(host); - - mrq->done = mmc_wait_data_done; - mrq->host = host; - - init_completion(&mrq->cmd_completion); - - err = mmc_start_request(host, mrq); - if (err) { - mrq->cmd->error = err; - mmc_complete_cmd(mrq); - mmc_wait_data_done(mrq); - } - - return err; -} - static int __mmc_start_req(struct mmc_host *host, struct mmc_request *mrq) { int err; @@ -432,8 +389,6 @@ static int __mmc_start_req(struct mmc_host *host, struct mmc_request *mrq) init_completion(&mrq->completion); mrq->done = mmc_wait_done; - init_completion(&mrq->cmd_completion); - err = mmc_start_request(host, mrq); if (err) { mrq->cmd->error = err; @@ -650,164 +605,11 @@ EXPORT_SYMBOL(mmc_cqe_recovery); */ bool mmc_is_req_done(struct mmc_host *host, struct mmc_request *mrq) { - if (host->areq) - return host->context_info.is_done_rcv; - else - return completion_done(&mrq->completion); + return completion_done(&mrq->completion); } EXPORT_SYMBOL(mmc_is_req_done); /** - * mmc_pre_req - Prepare for a new request - * @host: MMC host to prepare command - * @mrq: MMC request to prepare for - * - * mmc_pre_req() is called in prior to mmc_start_req() to let - * host prepare for the new request. Preparation of a request may be - * performed while another request is running on the host. - */ -static void mmc_pre_req(struct mmc_host *host, struct mmc_request *mrq) -{ - if (host->ops->pre_req) - host->ops->pre_req(host, mrq); -} - -/** - * mmc_post_req - Post process a completed request - * @host: MMC host to post process command - * @mrq: MMC request to post process for - * @err: Error, if non zero, clean up any resources made in pre_req - * - * Let the host post process a completed request. Post processing of - * a request may be performed while another reuqest is running. - */ -static void mmc_post_req(struct mmc_host *host, struct mmc_request *mrq, - int err) -{ - if (host->ops->post_req) - host->ops->post_req(host, mrq, err); -} - -/** - * mmc_finalize_areq() - finalize an asynchronous request - * @host: MMC host to finalize any ongoing request on - * - * Returns the status of the ongoing asynchronous request, but - * MMC_BLK_SUCCESS if no request was going on. - */ -static enum mmc_blk_status mmc_finalize_areq(struct mmc_host *host) -{ - struct mmc_context_info *context_info = &host->context_info; - enum mmc_blk_status status; - - if (!host->areq) - return MMC_BLK_SUCCESS; - - while (1) { - wait_event_interruptible(context_info->wait, - (context_info->is_done_rcv || - context_info->is_new_req)); - - if (context_info->is_done_rcv) { - struct mmc_command *cmd; - - context_info->is_done_rcv = false; - cmd = host->areq->mrq->cmd; - - if (!cmd->error || !cmd->retries || - mmc_card_removed(host->card)) { - status = host->areq->err_check(host->card, - host->areq); - break; /* return status */ - } else { - mmc_retune_recheck(host); - pr_info("%s: req failed (CMD%u): %d, retrying...\n", - mmc_hostname(host), - cmd->opcode, cmd->error); - cmd->retries--; - cmd->error = 0; - __mmc_start_request(host, host->areq->mrq); - continue; /* wait for done/new event again */ - } - } - - return MMC_BLK_NEW_REQUEST; - } - - mmc_retune_release(host); - - /* - * Check BKOPS urgency for each R1 response - */ - if (host->card && mmc_card_mmc(host->card) && - ((mmc_resp_type(host->areq->mrq->cmd) == MMC_RSP_R1) || - (mmc_resp_type(host->areq->mrq->cmd) == MMC_RSP_R1B)) && - (host->areq->mrq->cmd->resp[0] & R1_EXCEPTION_EVENT)) { - mmc_start_bkops(host->card, true); - } - - return status; -} - -/** - * mmc_start_areq - start an asynchronous request - * @host: MMC host to start command - * @areq: asynchronous request to start - * @ret_stat: out parameter for status - * - * Start a new MMC custom command request for a host. - * If there is on ongoing async request wait for completion - * of that request and start the new one and return. - * Does not wait for the new request to complete. - * - * Returns the completed request, NULL in case of none completed. - * Wait for the an ongoing request (previoulsy started) to complete and - * return the completed request. If there is no ongoing request, NULL - * is returned without waiting. NULL is not an error condition. - */ -struct mmc_async_req *mmc_start_areq(struct mmc_host *host, - struct mmc_async_req *areq, - enum mmc_blk_status *ret_stat) -{ - enum mmc_blk_status status; - int start_err = 0; - struct mmc_async_req *previous = host->areq; - - /* Prepare a new request */ - if (areq) - mmc_pre_req(host, areq->mrq); - - /* Finalize previous request */ - status = mmc_finalize_areq(host); - if (ret_stat) - *ret_stat = status; - - /* The previous request is still going on... */ - if (status == MMC_BLK_NEW_REQUEST) - return NULL; - - /* Fine so far, start the new request! */ - if (status == MMC_BLK_SUCCESS && areq) - start_err = __mmc_start_data_req(host, areq->mrq); - - /* Postprocess the old request at this point */ - if (host->areq) - mmc_post_req(host, host->areq->mrq, 0); - - /* Cancel a prepared request if it was not started. */ - if ((status != MMC_BLK_SUCCESS || start_err) && areq) - mmc_post_req(host, areq->mrq, -EINVAL); - - if (status != MMC_BLK_SUCCESS) - host->areq = NULL; - else - host->areq = areq; - - return previous; -} -EXPORT_SYMBOL(mmc_start_areq); - -/** * mmc_wait_for_req - start a request and wait for completion * @host: MMC host to start command * @mrq: MMC request to start @@ -2959,6 +2761,14 @@ static int mmc_pm_notify(struct notifier_block *notify_block, if (!err) break; + if (!mmc_card_is_removable(host)) { + dev_warn(mmc_dev(host), + "pre_suspend failed for non-removable host: " + "%d\n", err); + /* Avoid removing non-removable hosts */ + break; + } + /* Calling bus_ops->remove() with a claimed host can deadlock */ host->bus_ops->remove(host); mmc_claim_host(host); @@ -2994,22 +2804,6 @@ void mmc_unregister_pm_notifier(struct mmc_host *host) } #endif -/** - * mmc_init_context_info() - init synchronization context - * @host: mmc host - * - * Init struct context_info needed to implement asynchronous - * request mechanism, used by mmc core, host driver and mmc requests - * supplier. - */ -void mmc_init_context_info(struct mmc_host *host) -{ - host->context_info.is_new_req = false; - host->context_info.is_done_rcv = false; - host->context_info.is_waiting_last_req = false; - init_waitqueue_head(&host->context_info.wait); -} - static int __init mmc_init(void) { int ret; diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h index 71e6c6d7ceb7..d6303d69071b 100644 --- a/drivers/mmc/core/core.h +++ b/drivers/mmc/core/core.h @@ -62,12 +62,10 @@ void mmc_set_initial_state(struct mmc_host *host); static inline void mmc_delay(unsigned int ms) { - if (ms < 1000 / HZ) { - cond_resched(); - mdelay(ms); - } else { + if (ms <= 20) + usleep_range(ms * 1000, ms * 1250); + else msleep(ms); - } } void mmc_rescan(struct work_struct *work); @@ -91,8 +89,6 @@ void mmc_remove_host_debugfs(struct mmc_host *host); void mmc_add_card_debugfs(struct mmc_card *card); void mmc_remove_card_debugfs(struct mmc_card *card); -void mmc_init_context_info(struct mmc_host *host); - int mmc_execute_tuning(struct mmc_card *card); int mmc_hs200_to_hs400(struct mmc_card *card); int mmc_hs400_to_hs200(struct mmc_card *card); @@ -110,12 +106,6 @@ bool mmc_is_req_done(struct mmc_host *host, struct mmc_request *mrq); int mmc_start_request(struct mmc_host *host, struct mmc_request *mrq); -struct mmc_async_req; - -struct mmc_async_req *mmc_start_areq(struct mmc_host *host, - struct mmc_async_req *areq, - enum mmc_blk_status *ret_stat); - int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr, unsigned int arg); int mmc_can_erase(struct mmc_card *card); @@ -152,4 +142,35 @@ int mmc_cqe_start_req(struct mmc_host *host, struct mmc_request *mrq); void mmc_cqe_post_req(struct mmc_host *host, struct mmc_request *mrq); int mmc_cqe_recovery(struct mmc_host *host); +/** + * mmc_pre_req - Prepare for a new request + * @host: MMC host to prepare command + * @mrq: MMC request to prepare for + * + * mmc_pre_req() is called in prior to mmc_start_req() to let + * host prepare for the new request. Preparation of a request may be + * performed while another request is running on the host. + */ +static inline void mmc_pre_req(struct mmc_host *host, struct mmc_request *mrq) +{ + if (host->ops->pre_req) + host->ops->pre_req(host, mrq); +} + +/** + * mmc_post_req - Post process a completed request + * @host: MMC host to post process command + * @mrq: MMC request to post process for + * @err: Error, if non zero, clean up any resources made in pre_req + * + * Let the host post process a completed request. Post processing of + * a request may be performed while another request is running. + */ +static inline void mmc_post_req(struct mmc_host *host, struct mmc_request *mrq, + int err) +{ + if (host->ops->post_req) + host->ops->post_req(host, mrq, err); +} + #endif diff --git a/drivers/mmc/core/host.h b/drivers/mmc/core/host.h index fb689a1065ed..06ec19b5bf9f 100644 --- a/drivers/mmc/core/host.h +++ b/drivers/mmc/core/host.h @@ -41,6 +41,11 @@ static inline int mmc_host_cmd23(struct mmc_host *host) return host->caps & MMC_CAP_CMD23; } +static inline bool mmc_host_done_complete(struct mmc_host *host) +{ + return host->caps & MMC_CAP_DONE_COMPLETE; +} + static inline int mmc_boot_partition_access(struct mmc_host *host) { return !(host->caps2 & MMC_CAP2_BOOTPART_NOACC); @@ -74,6 +79,5 @@ static inline bool mmc_card_hs400es(struct mmc_card *card) return card->host->ios.enhanced_strobe; } - #endif diff --git a/drivers/mmc/core/mmc_test.c b/drivers/mmc/core/mmc_test.c index 478869805b96..ef18daeaa4cc 100644 --- a/drivers/mmc/core/mmc_test.c +++ b/drivers/mmc/core/mmc_test.c @@ -101,7 +101,7 @@ struct mmc_test_transfer_result { struct list_head link; unsigned int count; unsigned int sectors; - struct timespec ts; + struct timespec64 ts; unsigned int rate; unsigned int iops; }; @@ -171,11 +171,6 @@ struct mmc_test_multiple_rw { enum mmc_test_prep_media prepare; }; -struct mmc_test_async_req { - struct mmc_async_req areq; - struct mmc_test_card *test; -}; - /*******************************************************************/ /* General helper functions */ /*******************************************************************/ @@ -515,14 +510,11 @@ static int mmc_test_map_sg_max_scatter(struct mmc_test_mem *mem, /* * Calculate transfer rate in bytes per second. */ -static unsigned int mmc_test_rate(uint64_t bytes, struct timespec *ts) +static unsigned int mmc_test_rate(uint64_t bytes, struct timespec64 *ts) { uint64_t ns; - ns = ts->tv_sec; - ns *= 1000000000; - ns += ts->tv_nsec; - + ns = timespec64_to_ns(ts); bytes *= 1000000000; while (ns > UINT_MAX) { @@ -542,7 +534,7 @@ static unsigned int mmc_test_rate(uint64_t bytes, struct timespec *ts) * Save transfer results for future usage */ static void mmc_test_save_transfer_result(struct mmc_test_card *test, - unsigned int count, unsigned int sectors, struct timespec ts, + unsigned int count, unsigned int sectors, struct timespec64 ts, unsigned int rate, unsigned int iops) { struct mmc_test_transfer_result *tr; @@ -567,21 +559,21 @@ static void mmc_test_save_transfer_result(struct mmc_test_card *test, * Print the transfer rate. */ static void mmc_test_print_rate(struct mmc_test_card *test, uint64_t bytes, - struct timespec *ts1, struct timespec *ts2) + struct timespec64 *ts1, struct timespec64 *ts2) { unsigned int rate, iops, sectors = bytes >> 9; - struct timespec ts; + struct timespec64 ts; - ts = timespec_sub(*ts2, *ts1); + ts = timespec64_sub(*ts2, *ts1); rate = mmc_test_rate(bytes, &ts); iops = mmc_test_rate(100, &ts); /* I/O ops per sec x 100 */ - pr_info("%s: Transfer of %u sectors (%u%s KiB) took %lu.%09lu " + pr_info("%s: Transfer of %u sectors (%u%s KiB) took %llu.%09u " "seconds (%u kB/s, %u KiB/s, %u.%02u IOPS)\n", mmc_hostname(test->card->host), sectors, sectors >> 1, - (sectors & 1 ? ".5" : ""), (unsigned long)ts.tv_sec, - (unsigned long)ts.tv_nsec, rate / 1000, rate / 1024, + (sectors & 1 ? ".5" : ""), (u64)ts.tv_sec, + (u32)ts.tv_nsec, rate / 1000, rate / 1024, iops / 100, iops % 100); mmc_test_save_transfer_result(test, 1, sectors, ts, rate, iops); @@ -591,24 +583,24 @@ static void mmc_test_print_rate(struct mmc_test_card *test, uint64_t bytes, * Print the average transfer rate. */ static void mmc_test_print_avg_rate(struct mmc_test_card *test, uint64_t bytes, - unsigned int count, struct timespec *ts1, - struct timespec *ts2) + unsigned int count, struct timespec64 *ts1, + struct timespec64 *ts2) { unsigned int rate, iops, sectors = bytes >> 9; uint64_t tot = bytes * count; - struct timespec ts; + struct timespec64 ts; - ts = timespec_sub(*ts2, *ts1); + ts = timespec64_sub(*ts2, *ts1); rate = mmc_test_rate(tot, &ts); iops = mmc_test_rate(count * 100, &ts); /* I/O ops per sec x 100 */ pr_info("%s: Transfer of %u x %u sectors (%u x %u%s KiB) took " - "%lu.%09lu seconds (%u kB/s, %u KiB/s, " + "%llu.%09u seconds (%u kB/s, %u KiB/s, " "%u.%02u IOPS, sg_len %d)\n", mmc_hostname(test->card->host), count, sectors, count, sectors >> 1, (sectors & 1 ? ".5" : ""), - (unsigned long)ts.tv_sec, (unsigned long)ts.tv_nsec, + (u64)ts.tv_sec, (u32)ts.tv_nsec, rate / 1000, rate / 1024, iops / 100, iops % 100, test->area.sg_len); @@ -741,30 +733,6 @@ static int mmc_test_check_result(struct mmc_test_card *test, return ret; } -static enum mmc_blk_status mmc_test_check_result_async(struct mmc_card *card, - struct mmc_async_req *areq) -{ - struct mmc_test_async_req *test_async = - container_of(areq, struct mmc_test_async_req, areq); - int ret; - - mmc_test_wait_busy(test_async->test); - - /* - * FIXME: this would earlier just casts a regular error code, - * either of the kernel type -ERRORCODE or the local test framework - * RESULT_* errorcode, into an enum mmc_blk_status and return as - * result check. Instead, convert it to some reasonable type by just - * returning either MMC_BLK_SUCCESS or MMC_BLK_CMD_ERR. - * If possible, a reasonable error code should be returned. - */ - ret = mmc_test_check_result(test_async->test, areq->mrq); - if (ret) - return MMC_BLK_CMD_ERR; - - return MMC_BLK_SUCCESS; -} - /* * Checks that a "short transfer" behaved as expected */ @@ -831,6 +799,45 @@ static struct mmc_test_req *mmc_test_req_alloc(void) return rq; } +static void mmc_test_wait_done(struct mmc_request *mrq) +{ + complete(&mrq->completion); +} + +static int mmc_test_start_areq(struct mmc_test_card *test, + struct mmc_request *mrq, + struct mmc_request *prev_mrq) +{ + struct mmc_host *host = test->card->host; + int err = 0; + + if (mrq) { + init_completion(&mrq->completion); + mrq->done = mmc_test_wait_done; + mmc_pre_req(host, mrq); + } + + if (prev_mrq) { + wait_for_completion(&prev_mrq->completion); + err = mmc_test_wait_busy(test); + if (!err) + err = mmc_test_check_result(test, prev_mrq); + } + + if (!err && mrq) { + err = mmc_start_request(host, mrq); + if (err) + mmc_retune_release(host); + } + + if (prev_mrq) + mmc_post_req(host, prev_mrq, 0); + + if (err && mrq) + mmc_post_req(host, mrq, err); + + return err; +} static int mmc_test_nonblock_transfer(struct mmc_test_card *test, struct scatterlist *sg, unsigned sg_len, @@ -838,17 +845,10 @@ static int mmc_test_nonblock_transfer(struct mmc_test_card *test, unsigned blksz, int write, int count) { struct mmc_test_req *rq1, *rq2; - struct mmc_test_async_req test_areq[2]; - struct mmc_async_req *done_areq; - struct mmc_async_req *cur_areq = &test_areq[0].areq; - struct mmc_async_req *other_areq = &test_areq[1].areq; - enum mmc_blk_status status; + struct mmc_request *mrq, *prev_mrq; int i; int ret = RESULT_OK; - test_areq[0].test = test; - test_areq[1].test = test; - rq1 = mmc_test_req_alloc(); rq2 = mmc_test_req_alloc(); if (!rq1 || !rq2) { @@ -856,33 +856,25 @@ static int mmc_test_nonblock_transfer(struct mmc_test_card *test, goto err; } - cur_areq->mrq = &rq1->mrq; - cur_areq->err_check = mmc_test_check_result_async; - other_areq->mrq = &rq2->mrq; - other_areq->err_check = mmc_test_check_result_async; + mrq = &rq1->mrq; + prev_mrq = NULL; for (i = 0; i < count; i++) { - mmc_test_prepare_mrq(test, cur_areq->mrq, sg, sg_len, dev_addr, - blocks, blksz, write); - done_areq = mmc_start_areq(test->card->host, cur_areq, &status); - - if (status != MMC_BLK_SUCCESS || (!done_areq && i > 0)) { - ret = RESULT_FAIL; + mmc_test_req_reset(container_of(mrq, struct mmc_test_req, mrq)); + mmc_test_prepare_mrq(test, mrq, sg, sg_len, dev_addr, blocks, + blksz, write); + ret = mmc_test_start_areq(test, mrq, prev_mrq); + if (ret) goto err; - } - if (done_areq) - mmc_test_req_reset(container_of(done_areq->mrq, - struct mmc_test_req, mrq)); + if (!prev_mrq) + prev_mrq = &rq2->mrq; - swap(cur_areq, other_areq); + swap(mrq, prev_mrq); dev_addr += blocks; } - done_areq = mmc_start_areq(test->card->host, NULL, &status); - if (status != MMC_BLK_SUCCESS) - ret = RESULT_FAIL; - + ret = mmc_test_start_areq(test, NULL, prev_mrq); err: kfree(rq1); kfree(rq2); @@ -1449,7 +1441,7 @@ static int mmc_test_area_io_seq(struct mmc_test_card *test, unsigned long sz, int max_scatter, int timed, int count, bool nonblock, int min_sg_len) { - struct timespec ts1, ts2; + struct timespec64 ts1, ts2; int ret = 0; int i; struct mmc_test_area *t = &test->area; @@ -1475,7 +1467,7 @@ static int mmc_test_area_io_seq(struct mmc_test_card *test, unsigned long sz, return ret; if (timed) - getnstimeofday(&ts1); + ktime_get_ts64(&ts1); if (nonblock) ret = mmc_test_nonblock_transfer(test, t->sg, t->sg_len, dev_addr, t->blocks, 512, write, count); @@ -1489,7 +1481,7 @@ static int mmc_test_area_io_seq(struct mmc_test_card *test, unsigned long sz, return ret; if (timed) - getnstimeofday(&ts2); + ktime_get_ts64(&ts2); if (timed) mmc_test_print_avg_rate(test, sz, count, &ts1, &ts2); @@ -1747,7 +1739,7 @@ static int mmc_test_profile_trim_perf(struct mmc_test_card *test) struct mmc_test_area *t = &test->area; unsigned long sz; unsigned int dev_addr; - struct timespec ts1, ts2; + struct timespec64 ts1, ts2; int ret; if (!mmc_can_trim(test->card)) @@ -1758,19 +1750,19 @@ static int mmc_test_profile_trim_perf(struct mmc_test_card *test) for (sz = 512; sz < t->max_sz; sz <<= 1) { dev_addr = t->dev_addr + (sz >> 9); - getnstimeofday(&ts1); + ktime_get_ts64(&ts1); ret = mmc_erase(test->card, dev_addr, sz >> 9, MMC_TRIM_ARG); if (ret) return ret; - getnstimeofday(&ts2); + ktime_get_ts64(&ts2); mmc_test_print_rate(test, sz, &ts1, &ts2); } dev_addr = t->dev_addr; - getnstimeofday(&ts1); + ktime_get_ts64(&ts1); ret = mmc_erase(test->card, dev_addr, sz >> 9, MMC_TRIM_ARG); if (ret) return ret; - getnstimeofday(&ts2); + ktime_get_ts64(&ts2); mmc_test_print_rate(test, sz, &ts1, &ts2); return 0; } @@ -1779,19 +1771,19 @@ static int mmc_test_seq_read_perf(struct mmc_test_card *test, unsigned long sz) { struct mmc_test_area *t = &test->area; unsigned int dev_addr, i, cnt; - struct timespec ts1, ts2; + struct timespec64 ts1, ts2; int ret; cnt = t->max_sz / sz; dev_addr = t->dev_addr; - getnstimeofday(&ts1); + ktime_get_ts64(&ts1); for (i = 0; i < cnt; i++) { ret = mmc_test_area_io(test, sz, dev_addr, 0, 0, 0); if (ret) return ret; dev_addr += (sz >> 9); } - getnstimeofday(&ts2); + ktime_get_ts64(&ts2); mmc_test_print_avg_rate(test, sz, cnt, &ts1, &ts2); return 0; } @@ -1818,7 +1810,7 @@ static int mmc_test_seq_write_perf(struct mmc_test_card *test, unsigned long sz) { struct mmc_test_area *t = &test->area; unsigned int dev_addr, i, cnt; - struct timespec ts1, ts2; + struct timespec64 ts1, ts2; int ret; ret = mmc_test_area_erase(test); @@ -1826,14 +1818,14 @@ static int mmc_test_seq_write_perf(struct mmc_test_card *test, unsigned long sz) return ret; cnt = t->max_sz / sz; dev_addr = t->dev_addr; - getnstimeofday(&ts1); + ktime_get_ts64(&ts1); for (i = 0; i < cnt; i++) { ret = mmc_test_area_io(test, sz, dev_addr, 1, 0, 0); if (ret) return ret; dev_addr += (sz >> 9); } - getnstimeofday(&ts2); + ktime_get_ts64(&ts2); mmc_test_print_avg_rate(test, sz, cnt, &ts1, &ts2); return 0; } @@ -1864,7 +1856,7 @@ static int mmc_test_profile_seq_trim_perf(struct mmc_test_card *test) struct mmc_test_area *t = &test->area; unsigned long sz; unsigned int dev_addr, i, cnt; - struct timespec ts1, ts2; + struct timespec64 ts1, ts2; int ret; if (!mmc_can_trim(test->card)) @@ -1882,7 +1874,7 @@ static int mmc_test_profile_seq_trim_perf(struct mmc_test_card *test) return ret; cnt = t->max_sz / sz; dev_addr = t->dev_addr; - getnstimeofday(&ts1); + ktime_get_ts64(&ts1); for (i = 0; i < cnt; i++) { ret = mmc_erase(test->card, dev_addr, sz >> 9, MMC_TRIM_ARG); @@ -1890,7 +1882,7 @@ static int mmc_test_profile_seq_trim_perf(struct mmc_test_card *test) return ret; dev_addr += (sz >> 9); } - getnstimeofday(&ts2); + ktime_get_ts64(&ts2); mmc_test_print_avg_rate(test, sz, cnt, &ts1, &ts2); } return 0; @@ -1912,7 +1904,7 @@ static int mmc_test_rnd_perf(struct mmc_test_card *test, int write, int print, { unsigned int dev_addr, cnt, rnd_addr, range1, range2, last_ea = 0, ea; unsigned int ssz; - struct timespec ts1, ts2, ts; + struct timespec64 ts1, ts2, ts; int ret; ssz = sz >> 9; @@ -1921,10 +1913,10 @@ static int mmc_test_rnd_perf(struct mmc_test_card *test, int write, int print, range1 = rnd_addr / test->card->pref_erase; range2 = range1 / ssz; - getnstimeofday(&ts1); + ktime_get_ts64(&ts1); for (cnt = 0; cnt < UINT_MAX; cnt++) { - getnstimeofday(&ts2); - ts = timespec_sub(ts2, ts1); + ktime_get_ts64(&ts2); + ts = timespec64_sub(ts2, ts1); if (ts.tv_sec >= 10) break; ea = mmc_test_rnd_num(range1); @@ -1998,7 +1990,7 @@ static int mmc_test_seq_perf(struct mmc_test_card *test, int write, { struct mmc_test_area *t = &test->area; unsigned int dev_addr, i, cnt, sz, ssz; - struct timespec ts1, ts2; + struct timespec64 ts1, ts2; int ret; sz = t->max_tfr; @@ -2025,7 +2017,7 @@ static int mmc_test_seq_perf(struct mmc_test_card *test, int write, cnt = tot_sz / sz; dev_addr &= 0xffff0000; /* Round to 64MiB boundary */ - getnstimeofday(&ts1); + ktime_get_ts64(&ts1); for (i = 0; i < cnt; i++) { ret = mmc_test_area_io(test, sz, dev_addr, write, max_scatter, 0); @@ -2033,7 +2025,7 @@ static int mmc_test_seq_perf(struct mmc_test_card *test, int write, return ret; dev_addr += ssz; } - getnstimeofday(&ts2); + ktime_get_ts64(&ts2); mmc_test_print_avg_rate(test, sz, cnt, &ts1, &ts2); @@ -2328,10 +2320,17 @@ static int mmc_test_reset(struct mmc_test_card *test) int err; err = mmc_hw_reset(host); - if (!err) + if (!err) { + /* + * Reset will re-enable the card's command queue, but tests + * expect it to be disabled. + */ + if (card->ext_csd.cmdq_en) + mmc_cmdq_disable(card); return RESULT_OK; - else if (err == -EOPNOTSUPP) + } else if (err == -EOPNOTSUPP) { return RESULT_UNSUP_HOST; + } return RESULT_FAIL; } @@ -2356,11 +2355,9 @@ static int mmc_test_ongoing_transfer(struct mmc_test_card *test, struct mmc_test_req *rq = mmc_test_req_alloc(); struct mmc_host *host = test->card->host; struct mmc_test_area *t = &test->area; - struct mmc_test_async_req test_areq = { .test = test }; struct mmc_request *mrq; unsigned long timeout; bool expired = false; - enum mmc_blk_status blkstat = MMC_BLK_SUCCESS; int ret = 0, cmd_ret; u32 status = 0; int count = 0; @@ -2373,9 +2370,6 @@ static int mmc_test_ongoing_transfer(struct mmc_test_card *test, mrq->sbc = &rq->sbc; mrq->cap_cmd_during_tfr = true; - test_areq.areq.mrq = mrq; - test_areq.areq.err_check = mmc_test_check_result_async; - mmc_test_prepare_mrq(test, mrq, t->sg, t->sg_len, dev_addr, t->blocks, 512, write); @@ -2388,11 +2382,9 @@ static int mmc_test_ongoing_transfer(struct mmc_test_card *test, /* Start ongoing data request */ if (use_areq) { - mmc_start_areq(host, &test_areq.areq, &blkstat); - if (blkstat != MMC_BLK_SUCCESS) { - ret = RESULT_FAIL; + ret = mmc_test_start_areq(test, mrq, NULL); + if (ret) goto out_free; - } } else { mmc_wait_for_req(host, mrq); } @@ -2426,9 +2418,7 @@ static int mmc_test_ongoing_transfer(struct mmc_test_card *test, /* Wait for data request to complete */ if (use_areq) { - mmc_start_areq(host, NULL, &blkstat); - if (blkstat != MMC_BLK_SUCCESS) - ret = RESULT_FAIL; + ret = mmc_test_start_areq(test, NULL, mrq); } else { mmc_wait_for_req_done(test->card->host, mrq); } @@ -3066,10 +3056,9 @@ static int mtf_test_show(struct seq_file *sf, void *data) seq_printf(sf, "Test %d: %d\n", gr->testcase + 1, gr->result); list_for_each_entry(tr, &gr->tr_lst, link) { - seq_printf(sf, "%u %d %lu.%09lu %u %u.%02u\n", + seq_printf(sf, "%u %d %llu.%09u %u %u.%02u\n", tr->count, tr->sectors, - (unsigned long)tr->ts.tv_sec, - (unsigned long)tr->ts.tv_nsec, + (u64)tr->ts.tv_sec, (u32)tr->ts.tv_nsec, tr->rate, tr->iops / 100, tr->iops % 100); } } diff --git a/drivers/mmc/core/queue.c b/drivers/mmc/core/queue.c index 4f33d277b125..421fab7250ac 100644 --- a/drivers/mmc/core/queue.c +++ b/drivers/mmc/core/queue.c @@ -22,100 +22,147 @@ #include "block.h" #include "core.h" #include "card.h" +#include "host.h" -/* - * Prepare a MMC request. This just filters out odd stuff. - */ -static int mmc_prep_request(struct request_queue *q, struct request *req) +static inline bool mmc_cqe_dcmd_busy(struct mmc_queue *mq) { - struct mmc_queue *mq = q->queuedata; + /* Allow only 1 DCMD at a time */ + return mq->in_flight[MMC_ISSUE_DCMD]; +} - if (mq && mmc_card_removed(mq->card)) - return BLKPREP_KILL; +void mmc_cqe_check_busy(struct mmc_queue *mq) +{ + if ((mq->cqe_busy & MMC_CQE_DCMD_BUSY) && !mmc_cqe_dcmd_busy(mq)) + mq->cqe_busy &= ~MMC_CQE_DCMD_BUSY; - req->rq_flags |= RQF_DONTPREP; + mq->cqe_busy &= ~MMC_CQE_QUEUE_FULL; +} - return BLKPREP_OK; +static inline bool mmc_cqe_can_dcmd(struct mmc_host *host) +{ + return host->caps2 & MMC_CAP2_CQE_DCMD; } -static int mmc_queue_thread(void *d) +static enum mmc_issue_type mmc_cqe_issue_type(struct mmc_host *host, + struct request *req) { - struct mmc_queue *mq = d; - struct request_queue *q = mq->queue; - struct mmc_context_info *cntx = &mq->card->host->context_info; + switch (req_op(req)) { + case REQ_OP_DRV_IN: + case REQ_OP_DRV_OUT: + case REQ_OP_DISCARD: + case REQ_OP_SECURE_ERASE: + return MMC_ISSUE_SYNC; + case REQ_OP_FLUSH: + return mmc_cqe_can_dcmd(host) ? MMC_ISSUE_DCMD : MMC_ISSUE_SYNC; + default: + return MMC_ISSUE_ASYNC; + } +} - current->flags |= PF_MEMALLOC; +enum mmc_issue_type mmc_issue_type(struct mmc_queue *mq, struct request *req) +{ + struct mmc_host *host = mq->card->host; - down(&mq->thread_sem); - do { - struct request *req; + if (mq->use_cqe) + return mmc_cqe_issue_type(host, req); - spin_lock_irq(q->queue_lock); - set_current_state(TASK_INTERRUPTIBLE); - req = blk_fetch_request(q); - mq->asleep = false; - cntx->is_waiting_last_req = false; - cntx->is_new_req = false; - if (!req) { - /* - * Dispatch queue is empty so set flags for - * mmc_request_fn() to wake us up. - */ - if (mq->qcnt) - cntx->is_waiting_last_req = true; - else - mq->asleep = true; - } - spin_unlock_irq(q->queue_lock); + if (req_op(req) == REQ_OP_READ || req_op(req) == REQ_OP_WRITE) + return MMC_ISSUE_ASYNC; - if (req || mq->qcnt) { - set_current_state(TASK_RUNNING); - mmc_blk_issue_rq(mq, req); - cond_resched(); - } else { - if (kthread_should_stop()) { - set_current_state(TASK_RUNNING); - break; - } - up(&mq->thread_sem); - schedule(); - down(&mq->thread_sem); - } - } while (1); - up(&mq->thread_sem); + return MMC_ISSUE_SYNC; +} - return 0; +static void __mmc_cqe_recovery_notifier(struct mmc_queue *mq) +{ + if (!mq->recovery_needed) { + mq->recovery_needed = true; + schedule_work(&mq->recovery_work); + } } -/* - * Generic MMC request handler. This is called for any queue on a - * particular host. When the host is not busy, we look for a request - * on any queue on this host, and attempt to issue it. This may - * not be the queue we were asked to process. - */ -static void mmc_request_fn(struct request_queue *q) +void mmc_cqe_recovery_notifier(struct mmc_request *mrq) { + struct mmc_queue_req *mqrq = container_of(mrq, struct mmc_queue_req, + brq.mrq); + struct request *req = mmc_queue_req_to_req(mqrq); + struct request_queue *q = req->q; struct mmc_queue *mq = q->queuedata; - struct request *req; - struct mmc_context_info *cntx; + unsigned long flags; + + spin_lock_irqsave(q->queue_lock, flags); + __mmc_cqe_recovery_notifier(mq); + spin_unlock_irqrestore(q->queue_lock, flags); +} - if (!mq) { - while ((req = blk_fetch_request(q)) != NULL) { - req->rq_flags |= RQF_QUIET; - __blk_end_request_all(req, BLK_STS_IOERR); +static enum blk_eh_timer_return mmc_cqe_timed_out(struct request *req) +{ + struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); + struct mmc_request *mrq = &mqrq->brq.mrq; + struct mmc_queue *mq = req->q->queuedata; + struct mmc_host *host = mq->card->host; + enum mmc_issue_type issue_type = mmc_issue_type(mq, req); + bool recovery_needed = false; + + switch (issue_type) { + case MMC_ISSUE_ASYNC: + case MMC_ISSUE_DCMD: + if (host->cqe_ops->cqe_timeout(host, mrq, &recovery_needed)) { + if (recovery_needed) + __mmc_cqe_recovery_notifier(mq); + return BLK_EH_RESET_TIMER; } - return; + /* No timeout */ + return BLK_EH_HANDLED; + default: + /* Timeout is handled by mmc core */ + return BLK_EH_RESET_TIMER; } +} + +static enum blk_eh_timer_return mmc_mq_timed_out(struct request *req, + bool reserved) +{ + struct request_queue *q = req->q; + struct mmc_queue *mq = q->queuedata; + unsigned long flags; + int ret; - cntx = &mq->card->host->context_info; + spin_lock_irqsave(q->queue_lock, flags); - if (cntx->is_waiting_last_req) { - cntx->is_new_req = true; - wake_up_interruptible(&cntx->wait); - } + if (mq->recovery_needed || !mq->use_cqe) + ret = BLK_EH_RESET_TIMER; + else + ret = mmc_cqe_timed_out(req); - if (mq->asleep) - wake_up_process(mq->thread); + spin_unlock_irqrestore(q->queue_lock, flags); + + return ret; +} + +static void mmc_mq_recovery_handler(struct work_struct *work) +{ + struct mmc_queue *mq = container_of(work, struct mmc_queue, + recovery_work); + struct request_queue *q = mq->queue; + + mmc_get_card(mq->card, &mq->ctx); + + mq->in_recovery = true; + + if (mq->use_cqe) + mmc_blk_cqe_recovery(mq); + else + mmc_blk_mq_recovery(mq); + + mq->in_recovery = false; + + spin_lock_irq(q->queue_lock); + mq->recovery_needed = false; + spin_unlock_irq(q->queue_lock); + + mmc_put_card(mq->card, &mq->ctx); + + blk_mq_run_hw_queues(q, true); } static struct scatterlist *mmc_alloc_sg(int sg_len, gfp_t gfp) @@ -154,11 +201,10 @@ static void mmc_queue_setup_discard(struct request_queue *q, * @req: the request * @gfp: memory allocation policy */ -static int mmc_init_request(struct request_queue *q, struct request *req, - gfp_t gfp) +static int __mmc_init_request(struct mmc_queue *mq, struct request *req, + gfp_t gfp) { struct mmc_queue_req *mq_rq = req_to_mmc_queue_req(req); - struct mmc_queue *mq = q->queuedata; struct mmc_card *card = mq->card; struct mmc_host *host = card->host; @@ -177,6 +223,131 @@ static void mmc_exit_request(struct request_queue *q, struct request *req) mq_rq->sg = NULL; } +static int mmc_mq_init_request(struct blk_mq_tag_set *set, struct request *req, + unsigned int hctx_idx, unsigned int numa_node) +{ + return __mmc_init_request(set->driver_data, req, GFP_KERNEL); +} + +static void mmc_mq_exit_request(struct blk_mq_tag_set *set, struct request *req, + unsigned int hctx_idx) +{ + struct mmc_queue *mq = set->driver_data; + + mmc_exit_request(mq->queue, req); +} + +/* + * We use BLK_MQ_F_BLOCKING and have only 1 hardware queue, which means requests + * will not be dispatched in parallel. + */ +static blk_status_t mmc_mq_queue_rq(struct blk_mq_hw_ctx *hctx, + const struct blk_mq_queue_data *bd) +{ + struct request *req = bd->rq; + struct request_queue *q = req->q; + struct mmc_queue *mq = q->queuedata; + struct mmc_card *card = mq->card; + struct mmc_host *host = card->host; + enum mmc_issue_type issue_type; + enum mmc_issued issued; + bool get_card, cqe_retune_ok; + int ret; + + if (mmc_card_removed(mq->card)) { + req->rq_flags |= RQF_QUIET; + return BLK_STS_IOERR; + } + + issue_type = mmc_issue_type(mq, req); + + spin_lock_irq(q->queue_lock); + + if (mq->recovery_needed) { + spin_unlock_irq(q->queue_lock); + return BLK_STS_RESOURCE; + } + + switch (issue_type) { + case MMC_ISSUE_DCMD: + if (mmc_cqe_dcmd_busy(mq)) { + mq->cqe_busy |= MMC_CQE_DCMD_BUSY; + spin_unlock_irq(q->queue_lock); + return BLK_STS_RESOURCE; + } + break; + case MMC_ISSUE_ASYNC: + break; + default: + /* + * Timeouts are handled by mmc core, and we don't have a host + * API to abort requests, so we can't handle the timeout anyway. + * However, when the timeout happens, blk_mq_complete_request() + * no longer works (to stop the request disappearing under us). + * To avoid racing with that, set a large timeout. + */ + req->timeout = 600 * HZ; + break; + } + + mq->in_flight[issue_type] += 1; + get_card = (mmc_tot_in_flight(mq) == 1); + cqe_retune_ok = (mmc_cqe_qcnt(mq) == 1); + + spin_unlock_irq(q->queue_lock); + + if (!(req->rq_flags & RQF_DONTPREP)) { + req_to_mmc_queue_req(req)->retries = 0; + req->rq_flags |= RQF_DONTPREP; + } + + if (get_card) + mmc_get_card(card, &mq->ctx); + + if (mq->use_cqe) { + host->retune_now = host->need_retune && cqe_retune_ok && + !host->hold_retune; + } + + blk_mq_start_request(req); + + issued = mmc_blk_mq_issue_rq(mq, req); + + switch (issued) { + case MMC_REQ_BUSY: + ret = BLK_STS_RESOURCE; + break; + case MMC_REQ_FAILED_TO_START: + ret = BLK_STS_IOERR; + break; + default: + ret = BLK_STS_OK; + break; + } + + if (issued != MMC_REQ_STARTED) { + bool put_card = false; + + spin_lock_irq(q->queue_lock); + mq->in_flight[issue_type] -= 1; + if (mmc_tot_in_flight(mq) == 0) + put_card = true; + spin_unlock_irq(q->queue_lock); + if (put_card) + mmc_put_card(card, &mq->ctx); + } + + return ret; +} + +static const struct blk_mq_ops mmc_mq_ops = { + .queue_rq = mmc_mq_queue_rq, + .init_request = mmc_mq_init_request, + .exit_request = mmc_mq_exit_request, + .complete = mmc_blk_mq_complete, + .timeout = mmc_mq_timed_out, +}; + static void mmc_setup_queue(struct mmc_queue *mq, struct mmc_card *card) { struct mmc_host *host = card->host; @@ -196,124 +367,139 @@ static void mmc_setup_queue(struct mmc_queue *mq, struct mmc_card *card) blk_queue_max_segments(mq->queue, host->max_segs); blk_queue_max_segment_size(mq->queue, host->max_seg_size); - /* Initialize thread_sem even if it is not used */ - sema_init(&mq->thread_sem, 1); + INIT_WORK(&mq->recovery_work, mmc_mq_recovery_handler); + INIT_WORK(&mq->complete_work, mmc_blk_mq_complete_work); + + mutex_init(&mq->complete_lock); + + init_waitqueue_head(&mq->wait); } -/** - * mmc_init_queue - initialise a queue structure. - * @mq: mmc queue - * @card: mmc card to attach this queue - * @lock: queue lock - * @subname: partition subname - * - * Initialise a MMC card request queue. - */ -int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, - spinlock_t *lock, const char *subname) +static int mmc_mq_init_queue(struct mmc_queue *mq, int q_depth, + const struct blk_mq_ops *mq_ops, spinlock_t *lock) { - struct mmc_host *host = card->host; - int ret = -ENOMEM; - - mq->card = card; - mq->queue = blk_alloc_queue(GFP_KERNEL); - if (!mq->queue) - return -ENOMEM; - mq->queue->queue_lock = lock; - mq->queue->request_fn = mmc_request_fn; - mq->queue->init_rq_fn = mmc_init_request; - mq->queue->exit_rq_fn = mmc_exit_request; - mq->queue->cmd_size = sizeof(struct mmc_queue_req); - mq->queue->queuedata = mq; - mq->qcnt = 0; - ret = blk_init_allocated_queue(mq->queue); - if (ret) { - blk_cleanup_queue(mq->queue); + int ret; + + memset(&mq->tag_set, 0, sizeof(mq->tag_set)); + mq->tag_set.ops = mq_ops; + mq->tag_set.queue_depth = q_depth; + mq->tag_set.numa_node = NUMA_NO_NODE; + mq->tag_set.flags = BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_SG_MERGE | + BLK_MQ_F_BLOCKING; + mq->tag_set.nr_hw_queues = 1; + mq->tag_set.cmd_size = sizeof(struct mmc_queue_req); + mq->tag_set.driver_data = mq; + + ret = blk_mq_alloc_tag_set(&mq->tag_set); + if (ret) return ret; - } - - blk_queue_prep_rq(mq->queue, mmc_prep_request); - - mmc_setup_queue(mq, card); - mq->thread = kthread_run(mmc_queue_thread, mq, "mmcqd/%d%s", - host->index, subname ? subname : ""); - - if (IS_ERR(mq->thread)) { - ret = PTR_ERR(mq->thread); - goto cleanup_queue; + mq->queue = blk_mq_init_queue(&mq->tag_set); + if (IS_ERR(mq->queue)) { + ret = PTR_ERR(mq->queue); + goto free_tag_set; } + mq->queue->queue_lock = lock; + mq->queue->queuedata = mq; + return 0; -cleanup_queue: - blk_cleanup_queue(mq->queue); +free_tag_set: + blk_mq_free_tag_set(&mq->tag_set); + return ret; } -void mmc_cleanup_queue(struct mmc_queue *mq) -{ - struct request_queue *q = mq->queue; - unsigned long flags; +/* Set queue depth to get a reasonable value for q->nr_requests */ +#define MMC_QUEUE_DEPTH 64 - /* Make sure the queue isn't suspended, as that will deadlock */ - mmc_queue_resume(mq); +static int mmc_mq_init(struct mmc_queue *mq, struct mmc_card *card, + spinlock_t *lock) +{ + struct mmc_host *host = card->host; + int q_depth; + int ret; + + /* + * The queue depth for CQE must match the hardware because the request + * tag is used to index the hardware queue. + */ + if (mq->use_cqe) + q_depth = min_t(int, card->ext_csd.cmdq_depth, host->cqe_qdepth); + else + q_depth = MMC_QUEUE_DEPTH; + + ret = mmc_mq_init_queue(mq, q_depth, &mmc_mq_ops, lock); + if (ret) + return ret; - /* Then terminate our worker thread */ - kthread_stop(mq->thread); + blk_queue_rq_timeout(mq->queue, 60 * HZ); - /* Empty the queue */ - spin_lock_irqsave(q->queue_lock, flags); - q->queuedata = NULL; - blk_start_queue(q); - spin_unlock_irqrestore(q->queue_lock, flags); + mmc_setup_queue(mq, card); - mq->card = NULL; + return 0; } -EXPORT_SYMBOL(mmc_cleanup_queue); /** - * mmc_queue_suspend - suspend a MMC request queue - * @mq: MMC queue to suspend + * mmc_init_queue - initialise a queue structure. + * @mq: mmc queue + * @card: mmc card to attach this queue + * @lock: queue lock + * @subname: partition subname * - * Stop the block request queue, and wait for our thread to - * complete any outstanding requests. This ensures that we - * won't suspend while a request is being processed. + * Initialise a MMC card request queue. */ -void mmc_queue_suspend(struct mmc_queue *mq) +int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, + spinlock_t *lock, const char *subname) { - struct request_queue *q = mq->queue; - unsigned long flags; + struct mmc_host *host = card->host; - if (!mq->suspended) { - mq->suspended |= true; + mq->card = card; - spin_lock_irqsave(q->queue_lock, flags); - blk_stop_queue(q); - spin_unlock_irqrestore(q->queue_lock, flags); + mq->use_cqe = host->cqe_enabled; - down(&mq->thread_sem); - } + return mmc_mq_init(mq, card, lock); +} + +void mmc_queue_suspend(struct mmc_queue *mq) +{ + blk_mq_quiesce_queue(mq->queue); + + /* + * The host remains claimed while there are outstanding requests, so + * simply claiming and releasing here ensures there are none. + */ + mmc_claim_host(mq->card->host); + mmc_release_host(mq->card->host); } -/** - * mmc_queue_resume - resume a previously suspended MMC request queue - * @mq: MMC queue to resume - */ void mmc_queue_resume(struct mmc_queue *mq) { + blk_mq_unquiesce_queue(mq->queue); +} + +void mmc_cleanup_queue(struct mmc_queue *mq) +{ struct request_queue *q = mq->queue; - unsigned long flags; - if (mq->suspended) { - mq->suspended = false; + /* + * The legacy code handled the possibility of being suspended, + * so do that here too. + */ + if (blk_queue_quiesced(q)) + blk_mq_unquiesce_queue(q); - up(&mq->thread_sem); + blk_cleanup_queue(q); - spin_lock_irqsave(q->queue_lock, flags); - blk_start_queue(q); - spin_unlock_irqrestore(q->queue_lock, flags); - } + /* + * A request can be completed before the next request, potentially + * leaving a complete_work with nothing to do. Such a work item might + * still be queued at this point. Flush it. + */ + flush_work(&mq->complete_work); + + mq->card = NULL; } /* diff --git a/drivers/mmc/core/queue.h b/drivers/mmc/core/queue.h index 547b457c4251..17e59d50b496 100644 --- a/drivers/mmc/core/queue.h +++ b/drivers/mmc/core/queue.h @@ -8,6 +8,20 @@ #include <linux/mmc/core.h> #include <linux/mmc/host.h> +enum mmc_issued { + MMC_REQ_STARTED, + MMC_REQ_BUSY, + MMC_REQ_FAILED_TO_START, + MMC_REQ_FINISHED, +}; + +enum mmc_issue_type { + MMC_ISSUE_SYNC, + MMC_ISSUE_DCMD, + MMC_ISSUE_ASYNC, + MMC_ISSUE_MAX, +}; + static inline struct mmc_queue_req *req_to_mmc_queue_req(struct request *rq) { return blk_mq_rq_to_pdu(rq); @@ -20,7 +34,6 @@ static inline struct request *mmc_queue_req_to_req(struct mmc_queue_req *mqr) return blk_mq_rq_from_pdu(mqr); } -struct task_struct; struct mmc_blk_data; struct mmc_blk_ioc_data; @@ -30,7 +43,6 @@ struct mmc_blk_request { struct mmc_command cmd; struct mmc_command stop; struct mmc_data data; - int retune_retry_done; }; /** @@ -52,28 +64,34 @@ enum mmc_drv_op { struct mmc_queue_req { struct mmc_blk_request brq; struct scatterlist *sg; - struct mmc_async_req areq; enum mmc_drv_op drv_op; int drv_op_result; void *drv_op_data; unsigned int ioc_count; + int retries; }; struct mmc_queue { struct mmc_card *card; - struct task_struct *thread; - struct semaphore thread_sem; - bool suspended; - bool asleep; + struct mmc_ctx ctx; + struct blk_mq_tag_set tag_set; struct mmc_blk_data *blkdata; struct request_queue *queue; - /* - * FIXME: this counter is not a very reliable way of keeping - * track of how many requests that are ongoing. Switch to just - * letting the block core keep track of requests and per-request - * associated mmc_queue_req data. - */ - int qcnt; + int in_flight[MMC_ISSUE_MAX]; + unsigned int cqe_busy; +#define MMC_CQE_DCMD_BUSY BIT(0) +#define MMC_CQE_QUEUE_FULL BIT(1) + bool use_cqe; + bool recovery_needed; + bool in_recovery; + bool rw_wait; + bool waiting; + struct work_struct recovery_work; + wait_queue_head_t wait; + struct request *recovery_req; + struct request *complete_req; + struct mutex complete_lock; + struct work_struct complete_work; }; extern int mmc_init_queue(struct mmc_queue *, struct mmc_card *, spinlock_t *, @@ -84,4 +102,22 @@ extern void mmc_queue_resume(struct mmc_queue *); extern unsigned int mmc_queue_map_sg(struct mmc_queue *, struct mmc_queue_req *); +void mmc_cqe_check_busy(struct mmc_queue *mq); +void mmc_cqe_recovery_notifier(struct mmc_request *mrq); + +enum mmc_issue_type mmc_issue_type(struct mmc_queue *mq, struct request *req); + +static inline int mmc_tot_in_flight(struct mmc_queue *mq) +{ + return mq->in_flight[MMC_ISSUE_SYNC] + + mq->in_flight[MMC_ISSUE_DCMD] + + mq->in_flight[MMC_ISSUE_ASYNC]; +} + +static inline int mmc_cqe_qcnt(struct mmc_queue *mq) +{ + return mq->in_flight[MMC_ISSUE_DCMD] + + mq->in_flight[MMC_ISSUE_ASYNC]; +} + #endif diff --git a/drivers/mmc/core/slot-gpio.c b/drivers/mmc/core/slot-gpio.c index 863f1dbbfc1b..3698b0576009 100644 --- a/drivers/mmc/core/slot-gpio.c +++ b/drivers/mmc/core/slot-gpio.c @@ -121,20 +121,18 @@ EXPORT_SYMBOL(mmc_gpio_request_ro); void mmc_gpiod_request_cd_irq(struct mmc_host *host) { struct mmc_gpio *ctx = host->slot.handler_priv; - int ret, irq; + int irq = -EINVAL; + int ret; if (host->slot.cd_irq >= 0 || !ctx || !ctx->cd_gpio) return; - irq = gpiod_to_irq(ctx->cd_gpio); - /* - * Even if gpiod_to_irq() returns a valid IRQ number, the platform might - * still prefer to poll, e.g., because that IRQ number is already used - * by another unit and cannot be shared. + * Do not use IRQ if the platform prefers to poll, e.g., because that + * IRQ number is already used by another unit and cannot be shared. */ - if (irq >= 0 && host->caps & MMC_CAP_NEEDS_POLL) - irq = -EINVAL; + if (!(host->caps & MMC_CAP_NEEDS_POLL)) + irq = gpiod_to_irq(ctx->cd_gpio); if (irq >= 0) { if (!ctx->cd_gpio_isr) @@ -307,3 +305,11 @@ int mmc_gpiod_request_ro(struct mmc_host *host, const char *con_id, return 0; } EXPORT_SYMBOL(mmc_gpiod_request_ro); + +bool mmc_can_gpio_ro(struct mmc_host *host) +{ + struct mmc_gpio *ctx = host->slot.handler_priv; + + return ctx->ro_gpio ? true : false; +} +EXPORT_SYMBOL(mmc_can_gpio_ro); diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig index cec8152b5ede..67bd3344dd03 100644 --- a/drivers/mmc/host/Kconfig +++ b/drivers/mmc/host/Kconfig @@ -81,6 +81,7 @@ config MMC_SDHCI_BIG_ENDIAN_32BIT_BYTE_SWAPPER config MMC_SDHCI_PCI tristate "SDHCI support on PCI bus" depends on MMC_SDHCI && PCI + select MMC_CQHCI help This selects the PCI Secure Digital Host Controller Interface. Most controllers found today are PCI devices. @@ -132,6 +133,7 @@ config MMC_SDHCI_OF_ARASAN depends on MMC_SDHCI_PLTFM depends on OF depends on COMMON_CLK + select MMC_CQHCI help This selects the Arasan Secure Digital Host Controller Interface (SDHCI). This hardware is found e.g. in Xilinx' Zynq SoC. @@ -320,7 +322,7 @@ config MMC_SDHCI_BCM_KONA config MMC_SDHCI_F_SDH30 tristate "SDHCI support for Fujitsu Semiconductor F_SDH30" depends on MMC_SDHCI_PLTFM - depends on OF + depends on OF || ACPI help This selects the Secure Digital Host Controller Interface (SDHCI) Needed by some Fujitsu SoC for MMC / SD / SDIO support. @@ -595,11 +597,8 @@ config MMC_TMIO config MMC_SDHI tristate "Renesas SDHI SD/SDIO controller support" - depends on SUPERH || ARM || ARM64 depends on SUPERH || ARCH_RENESAS || COMPILE_TEST select MMC_TMIO_CORE - select MMC_SDHI_SYS_DMAC if (SUPERH || ARM) - select MMC_SDHI_INTERNAL_DMAC if ARM64 help This provides support for the SDHI SD/SDIO controller found in Renesas SuperH, ARM and ARM64 based SoCs @@ -607,6 +606,7 @@ config MMC_SDHI config MMC_SDHI_SYS_DMAC tristate "DMA for SDHI SD/SDIO controllers using SYS-DMAC" depends on MMC_SDHI + default MMC_SDHI if (SUPERH || ARM) help This provides DMA support for SDHI SD/SDIO controllers using SYS-DMAC via DMA Engine. This supports the controllers @@ -616,6 +616,7 @@ config MMC_SDHI_INTERNAL_DMAC tristate "DMA for SDHI SD/SDIO controllers using on-chip bus mastering" depends on ARM64 || COMPILE_TEST depends on MMC_SDHI + default MMC_SDHI if ARM64 help This provides DMA support for SDHI SD/SDIO controllers using on-chip bus mastering. This supports the controllers @@ -857,6 +858,19 @@ config MMC_SUNXI This selects support for the SD/MMC Host Controller on Allwinner sunxi SoCs. +config MMC_CQHCI + tristate "Command Queue Host Controller Interface support" + depends on HAS_DMA + help + This selects the Command Queue Host Controller Interface (CQHCI) + support present in host controllers of Qualcomm Technologies, Inc + amongst others. + This controller supports eMMC devices with command queue support. + + If you have a controller with this interface, say Y or M here. + + If unsure, say N. + config MMC_TOSHIBA_PCI tristate "Toshiba Type A SD/MMC Card Interface Driver" depends on PCI diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile index a43cf0d5a5d3..84cd1388abc3 100644 --- a/drivers/mmc/host/Makefile +++ b/drivers/mmc/host/Makefile @@ -11,7 +11,7 @@ obj-$(CONFIG_MMC_MXC) += mxcmmc.o obj-$(CONFIG_MMC_MXS) += mxs-mmc.o obj-$(CONFIG_MMC_SDHCI) += sdhci.o obj-$(CONFIG_MMC_SDHCI_PCI) += sdhci-pci.o -sdhci-pci-y += sdhci-pci-core.o sdhci-pci-o2micro.o +sdhci-pci-y += sdhci-pci-core.o sdhci-pci-o2micro.o sdhci-pci-arasan.o obj-$(subst m,y,$(CONFIG_MMC_SDHCI_PCI)) += sdhci-pci-data.o obj-$(CONFIG_MMC_SDHCI_ACPI) += sdhci-acpi.o obj-$(CONFIG_MMC_SDHCI_PXAV3) += sdhci-pxav3.o @@ -39,12 +39,8 @@ obj-$(CONFIG_MMC_SDRICOH_CS) += sdricoh_cs.o obj-$(CONFIG_MMC_TMIO) += tmio_mmc.o obj-$(CONFIG_MMC_TMIO_CORE) += tmio_mmc_core.o obj-$(CONFIG_MMC_SDHI) += renesas_sdhi_core.o -ifeq ($(subst m,y,$(CONFIG_MMC_SDHI_SYS_DMAC)),y) -obj-$(CONFIG_MMC_SDHI) += renesas_sdhi_sys_dmac.o -endif -ifeq ($(subst m,y,$(CONFIG_MMC_SDHI_INTERNAL_DMAC)),y) -obj-$(CONFIG_MMC_SDHI) += renesas_sdhi_internal_dmac.o -endif +obj-$(CONFIG_MMC_SDHI_SYS_DMAC) += renesas_sdhi_sys_dmac.o +obj-$(CONFIG_MMC_SDHI_INTERNAL_DMAC) += renesas_sdhi_internal_dmac.o obj-$(CONFIG_MMC_CB710) += cb710-mmc.o obj-$(CONFIG_MMC_VIA_SDMMC) += via-sdmmc.o obj-$(CONFIG_SDH_BFIN) += bfin_sdh.o @@ -92,6 +88,7 @@ obj-$(CONFIG_MMC_SDHCI_ST) += sdhci-st.o obj-$(CONFIG_MMC_SDHCI_MICROCHIP_PIC32) += sdhci-pic32.o obj-$(CONFIG_MMC_SDHCI_BRCMSTB) += sdhci-brcmstb.o obj-$(CONFIG_MMC_SDHCI_OMAP) += sdhci-omap.o +obj-$(CONFIG_MMC_CQHCI) += cqhci.o ifeq ($(CONFIG_CB710_DEBUG),y) CFLAGS-cb710-mmc += -DDEBUG diff --git a/drivers/mmc/host/android-goldfish.c b/drivers/mmc/host/android-goldfish.c index 63fe5091ca59..63d27589cd89 100644 --- a/drivers/mmc/host/android-goldfish.c +++ b/drivers/mmc/host/android-goldfish.c @@ -42,13 +42,11 @@ #include <linux/spinlock.h> #include <linux/timer.h> #include <linux/clk.h> -#include <linux/scatterlist.h> #include <asm/io.h> #include <asm/irq.h> #include <asm/types.h> -#include <asm/io.h> #include <linux/uaccess.h> #define DRIVER_NAME "goldfish_mmc" diff --git a/drivers/mmc/host/cqhci.c b/drivers/mmc/host/cqhci.c new file mode 100644 index 000000000000..159270e947cf --- /dev/null +++ b/drivers/mmc/host/cqhci.c @@ -0,0 +1,1150 @@ +/* Copyright (c) 2015, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/delay.h> +#include <linux/highmem.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/dma-mapping.h> +#include <linux/slab.h> +#include <linux/scatterlist.h> +#include <linux/platform_device.h> +#include <linux/ktime.h> + +#include <linux/mmc/mmc.h> +#include <linux/mmc/host.h> +#include <linux/mmc/card.h> + +#include "cqhci.h" + +#define DCMD_SLOT 31 +#define NUM_SLOTS 32 + +struct cqhci_slot { + struct mmc_request *mrq; + unsigned int flags; +#define CQHCI_EXTERNAL_TIMEOUT BIT(0) +#define CQHCI_COMPLETED BIT(1) +#define CQHCI_HOST_CRC BIT(2) +#define CQHCI_HOST_TIMEOUT BIT(3) +#define CQHCI_HOST_OTHER BIT(4) +}; + +static inline u8 *get_desc(struct cqhci_host *cq_host, u8 tag) +{ + return cq_host->desc_base + (tag * cq_host->slot_sz); +} + +static inline u8 *get_link_desc(struct cqhci_host *cq_host, u8 tag) +{ + u8 *desc = get_desc(cq_host, tag); + + return desc + cq_host->task_desc_len; +} + +static inline dma_addr_t get_trans_desc_dma(struct cqhci_host *cq_host, u8 tag) +{ + return cq_host->trans_desc_dma_base + + (cq_host->mmc->max_segs * tag * + cq_host->trans_desc_len); +} + +static inline u8 *get_trans_desc(struct cqhci_host *cq_host, u8 tag) +{ + return cq_host->trans_desc_base + + (cq_host->trans_desc_len * cq_host->mmc->max_segs * tag); +} + +static void setup_trans_desc(struct cqhci_host *cq_host, u8 tag) +{ + u8 *link_temp; + dma_addr_t trans_temp; + + link_temp = get_link_desc(cq_host, tag); + trans_temp = get_trans_desc_dma(cq_host, tag); + + memset(link_temp, 0, cq_host->link_desc_len); + if (cq_host->link_desc_len > 8) + *(link_temp + 8) = 0; + + if (tag == DCMD_SLOT && (cq_host->mmc->caps2 & MMC_CAP2_CQE_DCMD)) { + *link_temp = CQHCI_VALID(0) | CQHCI_ACT(0) | CQHCI_END(1); + return; + } + + *link_temp = CQHCI_VALID(1) | CQHCI_ACT(0x6) | CQHCI_END(0); + + if (cq_host->dma64) { + __le64 *data_addr = (__le64 __force *)(link_temp + 4); + + data_addr[0] = cpu_to_le64(trans_temp); + } else { + __le32 *data_addr = (__le32 __force *)(link_temp + 4); + + data_addr[0] = cpu_to_le32(trans_temp); + } +} + +static void cqhci_set_irqs(struct cqhci_host *cq_host, u32 set) +{ + cqhci_writel(cq_host, set, CQHCI_ISTE); + cqhci_writel(cq_host, set, CQHCI_ISGE); +} + +#define DRV_NAME "cqhci" + +#define CQHCI_DUMP(f, x...) \ + pr_err("%s: " DRV_NAME ": " f, mmc_hostname(mmc), ## x) + +static void cqhci_dumpregs(struct cqhci_host *cq_host) +{ + struct mmc_host *mmc = cq_host->mmc; + + CQHCI_DUMP("============ CQHCI REGISTER DUMP ===========\n"); + + CQHCI_DUMP("Caps: 0x%08x | Version: 0x%08x\n", + cqhci_readl(cq_host, CQHCI_CAP), + cqhci_readl(cq_host, CQHCI_VER)); + CQHCI_DUMP("Config: 0x%08x | Control: 0x%08x\n", + cqhci_readl(cq_host, CQHCI_CFG), + cqhci_readl(cq_host, CQHCI_CTL)); + CQHCI_DUMP("Int stat: 0x%08x | Int enab: 0x%08x\n", + cqhci_readl(cq_host, CQHCI_IS), + cqhci_readl(cq_host, CQHCI_ISTE)); + CQHCI_DUMP("Int sig: 0x%08x | Int Coal: 0x%08x\n", + cqhci_readl(cq_host, CQHCI_ISGE), + cqhci_readl(cq_host, CQHCI_IC)); + CQHCI_DUMP("TDL base: 0x%08x | TDL up32: 0x%08x\n", + cqhci_readl(cq_host, CQHCI_TDLBA), + cqhci_readl(cq_host, CQHCI_TDLBAU)); + CQHCI_DUMP("Doorbell: 0x%08x | TCN: 0x%08x\n", + cqhci_readl(cq_host, CQHCI_TDBR), + cqhci_readl(cq_host, CQHCI_TCN)); + CQHCI_DUMP("Dev queue: 0x%08x | Dev Pend: 0x%08x\n", + cqhci_readl(cq_host, CQHCI_DQS), + cqhci_readl(cq_host, CQHCI_DPT)); + CQHCI_DUMP("Task clr: 0x%08x | SSC1: 0x%08x\n", + cqhci_readl(cq_host, CQHCI_TCLR), + cqhci_readl(cq_host, CQHCI_SSC1)); + CQHCI_DUMP("SSC2: 0x%08x | DCMD rsp: 0x%08x\n", + cqhci_readl(cq_host, CQHCI_SSC2), + cqhci_readl(cq_host, CQHCI_CRDCT)); + CQHCI_DUMP("RED mask: 0x%08x | TERRI: 0x%08x\n", + cqhci_readl(cq_host, CQHCI_RMEM), + cqhci_readl(cq_host, CQHCI_TERRI)); + CQHCI_DUMP("Resp idx: 0x%08x | Resp arg: 0x%08x\n", + cqhci_readl(cq_host, CQHCI_CRI), + cqhci_readl(cq_host, CQHCI_CRA)); + + if (cq_host->ops->dumpregs) + cq_host->ops->dumpregs(mmc); + else + CQHCI_DUMP(": ===========================================\n"); +} + +/** + * The allocated descriptor table for task, link & transfer descritors + * looks like: + * |----------| + * |task desc | |->|----------| + * |----------| | |trans desc| + * |link desc-|->| |----------| + * |----------| . + * . . + * no. of slots max-segs + * . |----------| + * |----------| + * The idea here is to create the [task+trans] table and mark & point the + * link desc to the transfer desc table on a per slot basis. + */ +static int cqhci_host_alloc_tdl(struct cqhci_host *cq_host) +{ + int i = 0; + + /* task descriptor can be 64/128 bit irrespective of arch */ + if (cq_host->caps & CQHCI_TASK_DESC_SZ_128) { + cqhci_writel(cq_host, cqhci_readl(cq_host, CQHCI_CFG) | + CQHCI_TASK_DESC_SZ, CQHCI_CFG); + cq_host->task_desc_len = 16; + } else { + cq_host->task_desc_len = 8; + } + + /* + * 96 bits length of transfer desc instead of 128 bits which means + * ADMA would expect next valid descriptor at the 96th bit + * or 128th bit + */ + if (cq_host->dma64) { + if (cq_host->quirks & CQHCI_QUIRK_SHORT_TXFR_DESC_SZ) + cq_host->trans_desc_len = 12; + else + cq_host->trans_desc_len = 16; + cq_host->link_desc_len = 16; + } else { + cq_host->trans_desc_len = 8; + cq_host->link_desc_len = 8; + } + + /* total size of a slot: 1 task & 1 transfer (link) */ + cq_host->slot_sz = cq_host->task_desc_len + cq_host->link_desc_len; + + cq_host->desc_size = cq_host->slot_sz * cq_host->num_slots; + + cq_host->data_size = cq_host->trans_desc_len * cq_host->mmc->max_segs * + (cq_host->num_slots - 1); + + pr_debug("%s: cqhci: desc_size: %zu data_sz: %zu slot-sz: %d\n", + mmc_hostname(cq_host->mmc), cq_host->desc_size, cq_host->data_size, + cq_host->slot_sz); + + /* + * allocate a dma-mapped chunk of memory for the descriptors + * allocate a dma-mapped chunk of memory for link descriptors + * setup each link-desc memory offset per slot-number to + * the descriptor table. + */ + cq_host->desc_base = dmam_alloc_coherent(mmc_dev(cq_host->mmc), + cq_host->desc_size, + &cq_host->desc_dma_base, + GFP_KERNEL); + cq_host->trans_desc_base = dmam_alloc_coherent(mmc_dev(cq_host->mmc), + cq_host->data_size, + &cq_host->trans_desc_dma_base, + GFP_KERNEL); + if (!cq_host->desc_base || !cq_host->trans_desc_base) + return -ENOMEM; + + pr_debug("%s: cqhci: desc-base: 0x%p trans-base: 0x%p\n desc_dma 0x%llx trans_dma: 0x%llx\n", + mmc_hostname(cq_host->mmc), cq_host->desc_base, cq_host->trans_desc_base, + (unsigned long long)cq_host->desc_dma_base, + (unsigned long long)cq_host->trans_desc_dma_base); + + for (; i < (cq_host->num_slots); i++) + setup_trans_desc(cq_host, i); + + return 0; +} + +static void __cqhci_enable(struct cqhci_host *cq_host) +{ + struct mmc_host *mmc = cq_host->mmc; + u32 cqcfg; + + cqcfg = cqhci_readl(cq_host, CQHCI_CFG); + + /* Configuration must not be changed while enabled */ + if (cqcfg & CQHCI_ENABLE) { + cqcfg &= ~CQHCI_ENABLE; + cqhci_writel(cq_host, cqcfg, CQHCI_CFG); + } + + cqcfg &= ~(CQHCI_DCMD | CQHCI_TASK_DESC_SZ); + + if (mmc->caps2 & MMC_CAP2_CQE_DCMD) + cqcfg |= CQHCI_DCMD; + + if (cq_host->caps & CQHCI_TASK_DESC_SZ_128) + cqcfg |= CQHCI_TASK_DESC_SZ; + + cqhci_writel(cq_host, cqcfg, CQHCI_CFG); + + cqhci_writel(cq_host, lower_32_bits(cq_host->desc_dma_base), + CQHCI_TDLBA); + cqhci_writel(cq_host, upper_32_bits(cq_host->desc_dma_base), + CQHCI_TDLBAU); + + cqhci_writel(cq_host, cq_host->rca, CQHCI_SSC2); + + cqhci_set_irqs(cq_host, 0); + + cqcfg |= CQHCI_ENABLE; + + cqhci_writel(cq_host, cqcfg, CQHCI_CFG); + + mmc->cqe_on = true; + + if (cq_host->ops->enable) + cq_host->ops->enable(mmc); + + /* Ensure all writes are done before interrupts are enabled */ + wmb(); + + cqhci_set_irqs(cq_host, CQHCI_IS_MASK); + + cq_host->activated = true; +} + +static void __cqhci_disable(struct cqhci_host *cq_host) +{ + u32 cqcfg; + + cqcfg = cqhci_readl(cq_host, CQHCI_CFG); + cqcfg &= ~CQHCI_ENABLE; + cqhci_writel(cq_host, cqcfg, CQHCI_CFG); + + cq_host->mmc->cqe_on = false; + + cq_host->activated = false; +} + +int cqhci_suspend(struct mmc_host *mmc) +{ + struct cqhci_host *cq_host = mmc->cqe_private; + + if (cq_host->enabled) + __cqhci_disable(cq_host); + + return 0; +} +EXPORT_SYMBOL(cqhci_suspend); + +int cqhci_resume(struct mmc_host *mmc) +{ + /* Re-enable is done upon first request */ + return 0; +} +EXPORT_SYMBOL(cqhci_resume); + +static int cqhci_enable(struct mmc_host *mmc, struct mmc_card *card) +{ + struct cqhci_host *cq_host = mmc->cqe_private; + int err; + + if (cq_host->enabled) + return 0; + + cq_host->rca = card->rca; + + err = cqhci_host_alloc_tdl(cq_host); + if (err) + return err; + + __cqhci_enable(cq_host); + + cq_host->enabled = true; + +#ifdef DEBUG + cqhci_dumpregs(cq_host); +#endif + return 0; +} + +/* CQHCI is idle and should halt immediately, so set a small timeout */ +#define CQHCI_OFF_TIMEOUT 100 + +static void cqhci_off(struct mmc_host *mmc) +{ + struct cqhci_host *cq_host = mmc->cqe_private; + ktime_t timeout; + bool timed_out; + u32 reg; + + if (!cq_host->enabled || !mmc->cqe_on || cq_host->recovery_halt) + return; + + if (cq_host->ops->disable) + cq_host->ops->disable(mmc, false); + + cqhci_writel(cq_host, CQHCI_HALT, CQHCI_CTL); + + timeout = ktime_add_us(ktime_get(), CQHCI_OFF_TIMEOUT); + while (1) { + timed_out = ktime_compare(ktime_get(), timeout) > 0; + reg = cqhci_readl(cq_host, CQHCI_CTL); + if ((reg & CQHCI_HALT) || timed_out) + break; + } + + if (timed_out) + pr_err("%s: cqhci: CQE stuck on\n", mmc_hostname(mmc)); + else + pr_debug("%s: cqhci: CQE off\n", mmc_hostname(mmc)); + + mmc->cqe_on = false; +} + +static void cqhci_disable(struct mmc_host *mmc) +{ + struct cqhci_host *cq_host = mmc->cqe_private; + + if (!cq_host->enabled) + return; + + cqhci_off(mmc); + + __cqhci_disable(cq_host); + + dmam_free_coherent(mmc_dev(mmc), cq_host->data_size, + cq_host->trans_desc_base, + cq_host->trans_desc_dma_base); + + dmam_free_coherent(mmc_dev(mmc), cq_host->desc_size, + cq_host->desc_base, + cq_host->desc_dma_base); + + cq_host->trans_desc_base = NULL; + cq_host->desc_base = NULL; + + cq_host->enabled = false; +} + +static void cqhci_prep_task_desc(struct mmc_request *mrq, + u64 *data, bool intr) +{ + u32 req_flags = mrq->data->flags; + + *data = CQHCI_VALID(1) | + CQHCI_END(1) | + CQHCI_INT(intr) | + CQHCI_ACT(0x5) | + CQHCI_FORCED_PROG(!!(req_flags & MMC_DATA_FORCED_PRG)) | + CQHCI_DATA_TAG(!!(req_flags & MMC_DATA_DAT_TAG)) | + CQHCI_DATA_DIR(!!(req_flags & MMC_DATA_READ)) | + CQHCI_PRIORITY(!!(req_flags & MMC_DATA_PRIO)) | + CQHCI_QBAR(!!(req_flags & MMC_DATA_QBR)) | + CQHCI_REL_WRITE(!!(req_flags & MMC_DATA_REL_WR)) | + CQHCI_BLK_COUNT(mrq->data->blocks) | + CQHCI_BLK_ADDR((u64)mrq->data->blk_addr); + + pr_debug("%s: cqhci: tag %d task descriptor 0x016%llx\n", + mmc_hostname(mrq->host), mrq->tag, (unsigned long long)*data); +} + +static int cqhci_dma_map(struct mmc_host *host, struct mmc_request *mrq) +{ + int sg_count; + struct mmc_data *data = mrq->data; + + if (!data) + return -EINVAL; + + sg_count = dma_map_sg(mmc_dev(host), data->sg, + data->sg_len, + (data->flags & MMC_DATA_WRITE) ? + DMA_TO_DEVICE : DMA_FROM_DEVICE); + if (!sg_count) { + pr_err("%s: sg-len: %d\n", __func__, data->sg_len); + return -ENOMEM; + } + + return sg_count; +} + +static void cqhci_set_tran_desc(u8 *desc, dma_addr_t addr, int len, bool end, + bool dma64) +{ + __le32 *attr = (__le32 __force *)desc; + + *attr = (CQHCI_VALID(1) | + CQHCI_END(end ? 1 : 0) | + CQHCI_INT(0) | + CQHCI_ACT(0x4) | + CQHCI_DAT_LENGTH(len)); + + if (dma64) { + __le64 *dataddr = (__le64 __force *)(desc + 4); + + dataddr[0] = cpu_to_le64(addr); + } else { + __le32 *dataddr = (__le32 __force *)(desc + 4); + + dataddr[0] = cpu_to_le32(addr); + } +} + +static int cqhci_prep_tran_desc(struct mmc_request *mrq, + struct cqhci_host *cq_host, int tag) +{ + struct mmc_data *data = mrq->data; + int i, sg_count, len; + bool end = false; + bool dma64 = cq_host->dma64; + dma_addr_t addr; + u8 *desc; + struct scatterlist *sg; + + sg_count = cqhci_dma_map(mrq->host, mrq); + if (sg_count < 0) { + pr_err("%s: %s: unable to map sg lists, %d\n", + mmc_hostname(mrq->host), __func__, sg_count); + return sg_count; + } + + desc = get_trans_desc(cq_host, tag); + + for_each_sg(data->sg, sg, sg_count, i) { + addr = sg_dma_address(sg); + len = sg_dma_len(sg); + + if ((i+1) == sg_count) + end = true; + cqhci_set_tran_desc(desc, addr, len, end, dma64); + desc += cq_host->trans_desc_len; + } + + return 0; +} + +static void cqhci_prep_dcmd_desc(struct mmc_host *mmc, + struct mmc_request *mrq) +{ + u64 *task_desc = NULL; + u64 data = 0; + u8 resp_type; + u8 *desc; + __le64 *dataddr; + struct cqhci_host *cq_host = mmc->cqe_private; + u8 timing; + + if (!(mrq->cmd->flags & MMC_RSP_PRESENT)) { + resp_type = 0x0; + timing = 0x1; + } else { + if (mrq->cmd->flags & MMC_RSP_R1B) { + resp_type = 0x3; + timing = 0x0; + } else { + resp_type = 0x2; + timing = 0x1; + } + } + + task_desc = (__le64 __force *)get_desc(cq_host, cq_host->dcmd_slot); + memset(task_desc, 0, cq_host->task_desc_len); + data |= (CQHCI_VALID(1) | + CQHCI_END(1) | + CQHCI_INT(1) | + CQHCI_QBAR(1) | + CQHCI_ACT(0x5) | + CQHCI_CMD_INDEX(mrq->cmd->opcode) | + CQHCI_CMD_TIMING(timing) | CQHCI_RESP_TYPE(resp_type)); + *task_desc |= data; + desc = (u8 *)task_desc; + pr_debug("%s: cqhci: dcmd: cmd: %d timing: %d resp: %d\n", + mmc_hostname(mmc), mrq->cmd->opcode, timing, resp_type); + dataddr = (__le64 __force *)(desc + 4); + dataddr[0] = cpu_to_le64((u64)mrq->cmd->arg); + +} + +static void cqhci_post_req(struct mmc_host *host, struct mmc_request *mrq) +{ + struct mmc_data *data = mrq->data; + + if (data) { + dma_unmap_sg(mmc_dev(host), data->sg, data->sg_len, + (data->flags & MMC_DATA_READ) ? + DMA_FROM_DEVICE : DMA_TO_DEVICE); + } +} + +static inline int cqhci_tag(struct mmc_request *mrq) +{ + return mrq->cmd ? DCMD_SLOT : mrq->tag; +} + +static int cqhci_request(struct mmc_host *mmc, struct mmc_request *mrq) +{ + int err = 0; + u64 data = 0; + u64 *task_desc = NULL; + int tag = cqhci_tag(mrq); + struct cqhci_host *cq_host = mmc->cqe_private; + unsigned long flags; + + if (!cq_host->enabled) { + pr_err("%s: cqhci: not enabled\n", mmc_hostname(mmc)); + return -EINVAL; + } + + /* First request after resume has to re-enable */ + if (!cq_host->activated) + __cqhci_enable(cq_host); + + if (!mmc->cqe_on) { + cqhci_writel(cq_host, 0, CQHCI_CTL); + mmc->cqe_on = true; + pr_debug("%s: cqhci: CQE on\n", mmc_hostname(mmc)); + if (cqhci_readl(cq_host, CQHCI_CTL) && CQHCI_HALT) { + pr_err("%s: cqhci: CQE failed to exit halt state\n", + mmc_hostname(mmc)); + } + if (cq_host->ops->enable) + cq_host->ops->enable(mmc); + } + + if (mrq->data) { + task_desc = (__le64 __force *)get_desc(cq_host, tag); + cqhci_prep_task_desc(mrq, &data, 1); + *task_desc = cpu_to_le64(data); + err = cqhci_prep_tran_desc(mrq, cq_host, tag); + if (err) { + pr_err("%s: cqhci: failed to setup tx desc: %d\n", + mmc_hostname(mmc), err); + return err; + } + } else { + cqhci_prep_dcmd_desc(mmc, mrq); + } + + spin_lock_irqsave(&cq_host->lock, flags); + + if (cq_host->recovery_halt) { + err = -EBUSY; + goto out_unlock; + } + + cq_host->slot[tag].mrq = mrq; + cq_host->slot[tag].flags = 0; + + cq_host->qcnt += 1; + + cqhci_writel(cq_host, 1 << tag, CQHCI_TDBR); + if (!(cqhci_readl(cq_host, CQHCI_TDBR) & (1 << tag))) + pr_debug("%s: cqhci: doorbell not set for tag %d\n", + mmc_hostname(mmc), tag); +out_unlock: + spin_unlock_irqrestore(&cq_host->lock, flags); + + if (err) + cqhci_post_req(mmc, mrq); + + return err; +} + +static void cqhci_recovery_needed(struct mmc_host *mmc, struct mmc_request *mrq, + bool notify) +{ + struct cqhci_host *cq_host = mmc->cqe_private; + + if (!cq_host->recovery_halt) { + cq_host->recovery_halt = true; + pr_debug("%s: cqhci: recovery needed\n", mmc_hostname(mmc)); + wake_up(&cq_host->wait_queue); + if (notify && mrq->recovery_notifier) + mrq->recovery_notifier(mrq); + } +} + +static unsigned int cqhci_error_flags(int error1, int error2) +{ + int error = error1 ? error1 : error2; + + switch (error) { + case -EILSEQ: + return CQHCI_HOST_CRC; + case -ETIMEDOUT: + return CQHCI_HOST_TIMEOUT; + default: + return CQHCI_HOST_OTHER; + } +} + +static void cqhci_error_irq(struct mmc_host *mmc, u32 status, int cmd_error, + int data_error) +{ + struct cqhci_host *cq_host = mmc->cqe_private; + struct cqhci_slot *slot; + u32 terri; + int tag; + + spin_lock(&cq_host->lock); + + terri = cqhci_readl(cq_host, CQHCI_TERRI); + + pr_debug("%s: cqhci: error IRQ status: 0x%08x cmd error %d data error %d TERRI: 0x%08x\n", + mmc_hostname(mmc), status, cmd_error, data_error, terri); + + /* Forget about errors when recovery has already been triggered */ + if (cq_host->recovery_halt) + goto out_unlock; + + if (!cq_host->qcnt) { + WARN_ONCE(1, "%s: cqhci: error when idle. IRQ status: 0x%08x cmd error %d data error %d TERRI: 0x%08x\n", + mmc_hostname(mmc), status, cmd_error, data_error, + terri); + goto out_unlock; + } + + if (CQHCI_TERRI_C_VALID(terri)) { + tag = CQHCI_TERRI_C_TASK(terri); + slot = &cq_host->slot[tag]; + if (slot->mrq) { + slot->flags = cqhci_error_flags(cmd_error, data_error); + cqhci_recovery_needed(mmc, slot->mrq, true); + } + } + + if (CQHCI_TERRI_D_VALID(terri)) { + tag = CQHCI_TERRI_D_TASK(terri); + slot = &cq_host->slot[tag]; + if (slot->mrq) { + slot->flags = cqhci_error_flags(data_error, cmd_error); + cqhci_recovery_needed(mmc, slot->mrq, true); + } + } + + if (!cq_host->recovery_halt) { + /* + * The only way to guarantee forward progress is to mark at + * least one task in error, so if none is indicated, pick one. + */ + for (tag = 0; tag < NUM_SLOTS; tag++) { + slot = &cq_host->slot[tag]; + if (!slot->mrq) + continue; + slot->flags = cqhci_error_flags(data_error, cmd_error); + cqhci_recovery_needed(mmc, slot->mrq, true); + break; + } + } + +out_unlock: + spin_unlock(&cq_host->lock); +} + +static void cqhci_finish_mrq(struct mmc_host *mmc, unsigned int tag) +{ + struct cqhci_host *cq_host = mmc->cqe_private; + struct cqhci_slot *slot = &cq_host->slot[tag]; + struct mmc_request *mrq = slot->mrq; + struct mmc_data *data; + + if (!mrq) { + WARN_ONCE(1, "%s: cqhci: spurious TCN for tag %d\n", + mmc_hostname(mmc), tag); + return; + } + + /* No completions allowed during recovery */ + if (cq_host->recovery_halt) { + slot->flags |= CQHCI_COMPLETED; + return; + } + + slot->mrq = NULL; + + cq_host->qcnt -= 1; + + data = mrq->data; + if (data) { + if (data->error) + data->bytes_xfered = 0; + else + data->bytes_xfered = data->blksz * data->blocks; + } + + mmc_cqe_request_done(mmc, mrq); +} + +irqreturn_t cqhci_irq(struct mmc_host *mmc, u32 intmask, int cmd_error, + int data_error) +{ + u32 status; + unsigned long tag = 0, comp_status; + struct cqhci_host *cq_host = mmc->cqe_private; + + status = cqhci_readl(cq_host, CQHCI_IS); + cqhci_writel(cq_host, status, CQHCI_IS); + + pr_debug("%s: cqhci: IRQ status: 0x%08x\n", mmc_hostname(mmc), status); + + if ((status & CQHCI_IS_RED) || cmd_error || data_error) + cqhci_error_irq(mmc, status, cmd_error, data_error); + + if (status & CQHCI_IS_TCC) { + /* read TCN and complete the request */ + comp_status = cqhci_readl(cq_host, CQHCI_TCN); + cqhci_writel(cq_host, comp_status, CQHCI_TCN); + pr_debug("%s: cqhci: TCN: 0x%08lx\n", + mmc_hostname(mmc), comp_status); + + spin_lock(&cq_host->lock); + + for_each_set_bit(tag, &comp_status, cq_host->num_slots) { + /* complete the corresponding mrq */ + pr_debug("%s: cqhci: completing tag %lu\n", + mmc_hostname(mmc), tag); + cqhci_finish_mrq(mmc, tag); + } + + if (cq_host->waiting_for_idle && !cq_host->qcnt) { + cq_host->waiting_for_idle = false; + wake_up(&cq_host->wait_queue); + } + + spin_unlock(&cq_host->lock); + } + + if (status & CQHCI_IS_TCL) + wake_up(&cq_host->wait_queue); + + if (status & CQHCI_IS_HAC) + wake_up(&cq_host->wait_queue); + + return IRQ_HANDLED; +} +EXPORT_SYMBOL(cqhci_irq); + +static bool cqhci_is_idle(struct cqhci_host *cq_host, int *ret) +{ + unsigned long flags; + bool is_idle; + + spin_lock_irqsave(&cq_host->lock, flags); + is_idle = !cq_host->qcnt || cq_host->recovery_halt; + *ret = cq_host->recovery_halt ? -EBUSY : 0; + cq_host->waiting_for_idle = !is_idle; + spin_unlock_irqrestore(&cq_host->lock, flags); + + return is_idle; +} + +static int cqhci_wait_for_idle(struct mmc_host *mmc) +{ + struct cqhci_host *cq_host = mmc->cqe_private; + int ret; + + wait_event(cq_host->wait_queue, cqhci_is_idle(cq_host, &ret)); + + return ret; +} + +static bool cqhci_timeout(struct mmc_host *mmc, struct mmc_request *mrq, + bool *recovery_needed) +{ + struct cqhci_host *cq_host = mmc->cqe_private; + int tag = cqhci_tag(mrq); + struct cqhci_slot *slot = &cq_host->slot[tag]; + unsigned long flags; + bool timed_out; + + spin_lock_irqsave(&cq_host->lock, flags); + timed_out = slot->mrq == mrq; + if (timed_out) { + slot->flags |= CQHCI_EXTERNAL_TIMEOUT; + cqhci_recovery_needed(mmc, mrq, false); + *recovery_needed = cq_host->recovery_halt; + } + spin_unlock_irqrestore(&cq_host->lock, flags); + + if (timed_out) { + pr_err("%s: cqhci: timeout for tag %d\n", + mmc_hostname(mmc), tag); + cqhci_dumpregs(cq_host); + } + + return timed_out; +} + +static bool cqhci_tasks_cleared(struct cqhci_host *cq_host) +{ + return !(cqhci_readl(cq_host, CQHCI_CTL) & CQHCI_CLEAR_ALL_TASKS); +} + +static bool cqhci_clear_all_tasks(struct mmc_host *mmc, unsigned int timeout) +{ + struct cqhci_host *cq_host = mmc->cqe_private; + bool ret; + u32 ctl; + + cqhci_set_irqs(cq_host, CQHCI_IS_TCL); + + ctl = cqhci_readl(cq_host, CQHCI_CTL); + ctl |= CQHCI_CLEAR_ALL_TASKS; + cqhci_writel(cq_host, ctl, CQHCI_CTL); + + wait_event_timeout(cq_host->wait_queue, cqhci_tasks_cleared(cq_host), + msecs_to_jiffies(timeout) + 1); + + cqhci_set_irqs(cq_host, 0); + + ret = cqhci_tasks_cleared(cq_host); + + if (!ret) + pr_debug("%s: cqhci: Failed to clear tasks\n", + mmc_hostname(mmc)); + + return ret; +} + +static bool cqhci_halted(struct cqhci_host *cq_host) +{ + return cqhci_readl(cq_host, CQHCI_CTL) & CQHCI_HALT; +} + +static bool cqhci_halt(struct mmc_host *mmc, unsigned int timeout) +{ + struct cqhci_host *cq_host = mmc->cqe_private; + bool ret; + u32 ctl; + + if (cqhci_halted(cq_host)) + return true; + + cqhci_set_irqs(cq_host, CQHCI_IS_HAC); + + ctl = cqhci_readl(cq_host, CQHCI_CTL); + ctl |= CQHCI_HALT; + cqhci_writel(cq_host, ctl, CQHCI_CTL); + + wait_event_timeout(cq_host->wait_queue, cqhci_halted(cq_host), + msecs_to_jiffies(timeout) + 1); + + cqhci_set_irqs(cq_host, 0); + + ret = cqhci_halted(cq_host); + + if (!ret) + pr_debug("%s: cqhci: Failed to halt\n", mmc_hostname(mmc)); + + return ret; +} + +/* + * After halting we expect to be able to use the command line. We interpret the + * failure to halt to mean the data lines might still be in use (and the upper + * layers will need to send a STOP command), so we set the timeout based on a + * generous command timeout. + */ +#define CQHCI_START_HALT_TIMEOUT 5 + +static void cqhci_recovery_start(struct mmc_host *mmc) +{ + struct cqhci_host *cq_host = mmc->cqe_private; + + pr_debug("%s: cqhci: %s\n", mmc_hostname(mmc), __func__); + + WARN_ON(!cq_host->recovery_halt); + + cqhci_halt(mmc, CQHCI_START_HALT_TIMEOUT); + + if (cq_host->ops->disable) + cq_host->ops->disable(mmc, true); + + mmc->cqe_on = false; +} + +static int cqhci_error_from_flags(unsigned int flags) +{ + if (!flags) + return 0; + + /* CRC errors might indicate re-tuning so prefer to report that */ + if (flags & CQHCI_HOST_CRC) + return -EILSEQ; + + if (flags & (CQHCI_EXTERNAL_TIMEOUT | CQHCI_HOST_TIMEOUT)) + return -ETIMEDOUT; + + return -EIO; +} + +static void cqhci_recover_mrq(struct cqhci_host *cq_host, unsigned int tag) +{ + struct cqhci_slot *slot = &cq_host->slot[tag]; + struct mmc_request *mrq = slot->mrq; + struct mmc_data *data; + + if (!mrq) + return; + + slot->mrq = NULL; + + cq_host->qcnt -= 1; + + data = mrq->data; + if (data) { + data->bytes_xfered = 0; + data->error = cqhci_error_from_flags(slot->flags); + } else { + mrq->cmd->error = cqhci_error_from_flags(slot->flags); + } + + mmc_cqe_request_done(cq_host->mmc, mrq); +} + +static void cqhci_recover_mrqs(struct cqhci_host *cq_host) +{ + int i; + + for (i = 0; i < cq_host->num_slots; i++) + cqhci_recover_mrq(cq_host, i); +} + +/* + * By now the command and data lines should be unused so there is no reason for + * CQHCI to take a long time to halt, but if it doesn't halt there could be + * problems clearing tasks, so be generous. + */ +#define CQHCI_FINISH_HALT_TIMEOUT 20 + +/* CQHCI could be expected to clear it's internal state pretty quickly */ +#define CQHCI_CLEAR_TIMEOUT 20 + +static void cqhci_recovery_finish(struct mmc_host *mmc) +{ + struct cqhci_host *cq_host = mmc->cqe_private; + unsigned long flags; + u32 cqcfg; + bool ok; + + pr_debug("%s: cqhci: %s\n", mmc_hostname(mmc), __func__); + + WARN_ON(!cq_host->recovery_halt); + + ok = cqhci_halt(mmc, CQHCI_FINISH_HALT_TIMEOUT); + + if (!cqhci_clear_all_tasks(mmc, CQHCI_CLEAR_TIMEOUT)) + ok = false; + + /* + * The specification contradicts itself, by saying that tasks cannot be + * cleared if CQHCI does not halt, but if CQHCI does not halt, it should + * be disabled/re-enabled, but not to disable before clearing tasks. + * Have a go anyway. + */ + if (!ok) { + pr_debug("%s: cqhci: disable / re-enable\n", mmc_hostname(mmc)); + cqcfg = cqhci_readl(cq_host, CQHCI_CFG); + cqcfg &= ~CQHCI_ENABLE; + cqhci_writel(cq_host, cqcfg, CQHCI_CFG); + cqcfg |= CQHCI_ENABLE; + cqhci_writel(cq_host, cqcfg, CQHCI_CFG); + /* Be sure that there are no tasks */ + ok = cqhci_halt(mmc, CQHCI_FINISH_HALT_TIMEOUT); + if (!cqhci_clear_all_tasks(mmc, CQHCI_CLEAR_TIMEOUT)) + ok = false; + WARN_ON(!ok); + } + + cqhci_recover_mrqs(cq_host); + + WARN_ON(cq_host->qcnt); + + spin_lock_irqsave(&cq_host->lock, flags); + cq_host->qcnt = 0; + cq_host->recovery_halt = false; + mmc->cqe_on = false; + spin_unlock_irqrestore(&cq_host->lock, flags); + + /* Ensure all writes are done before interrupts are re-enabled */ + wmb(); + + cqhci_writel(cq_host, CQHCI_IS_HAC | CQHCI_IS_TCL, CQHCI_IS); + + cqhci_set_irqs(cq_host, CQHCI_IS_MASK); + + pr_debug("%s: cqhci: recovery done\n", mmc_hostname(mmc)); +} + +static const struct mmc_cqe_ops cqhci_cqe_ops = { + .cqe_enable = cqhci_enable, + .cqe_disable = cqhci_disable, + .cqe_request = cqhci_request, + .cqe_post_req = cqhci_post_req, + .cqe_off = cqhci_off, + .cqe_wait_for_idle = cqhci_wait_for_idle, + .cqe_timeout = cqhci_timeout, + .cqe_recovery_start = cqhci_recovery_start, + .cqe_recovery_finish = cqhci_recovery_finish, +}; + +struct cqhci_host *cqhci_pltfm_init(struct platform_device *pdev) +{ + struct cqhci_host *cq_host; + struct resource *cqhci_memres = NULL; + + /* check and setup CMDQ interface */ + cqhci_memres = platform_get_resource_byname(pdev, IORESOURCE_MEM, + "cqhci_mem"); + if (!cqhci_memres) { + dev_dbg(&pdev->dev, "CMDQ not supported\n"); + return ERR_PTR(-EINVAL); + } + + cq_host = devm_kzalloc(&pdev->dev, sizeof(*cq_host), GFP_KERNEL); + if (!cq_host) + return ERR_PTR(-ENOMEM); + cq_host->mmio = devm_ioremap(&pdev->dev, + cqhci_memres->start, + resource_size(cqhci_memres)); + if (!cq_host->mmio) { + dev_err(&pdev->dev, "failed to remap cqhci regs\n"); + return ERR_PTR(-EBUSY); + } + dev_dbg(&pdev->dev, "CMDQ ioremap: done\n"); + + return cq_host; +} +EXPORT_SYMBOL(cqhci_pltfm_init); + +static unsigned int cqhci_ver_major(struct cqhci_host *cq_host) +{ + return CQHCI_VER_MAJOR(cqhci_readl(cq_host, CQHCI_VER)); +} + +static unsigned int cqhci_ver_minor(struct cqhci_host *cq_host) +{ + u32 ver = cqhci_readl(cq_host, CQHCI_VER); + + return CQHCI_VER_MINOR1(ver) * 10 + CQHCI_VER_MINOR2(ver); +} + +int cqhci_init(struct cqhci_host *cq_host, struct mmc_host *mmc, + bool dma64) +{ + int err; + + cq_host->dma64 = dma64; + cq_host->mmc = mmc; + cq_host->mmc->cqe_private = cq_host; + + cq_host->num_slots = NUM_SLOTS; + cq_host->dcmd_slot = DCMD_SLOT; + + mmc->cqe_ops = &cqhci_cqe_ops; + + mmc->cqe_qdepth = NUM_SLOTS; + if (mmc->caps2 & MMC_CAP2_CQE_DCMD) + mmc->cqe_qdepth -= 1; + + cq_host->slot = devm_kcalloc(mmc_dev(mmc), cq_host->num_slots, + sizeof(*cq_host->slot), GFP_KERNEL); + if (!cq_host->slot) { + err = -ENOMEM; + goto out_err; + } + + spin_lock_init(&cq_host->lock); + + init_completion(&cq_host->halt_comp); + init_waitqueue_head(&cq_host->wait_queue); + + pr_info("%s: CQHCI version %u.%02u\n", + mmc_hostname(mmc), cqhci_ver_major(cq_host), + cqhci_ver_minor(cq_host)); + + return 0; + +out_err: + pr_err("%s: CQHCI version %u.%02u failed to initialize, error %d\n", + mmc_hostname(mmc), cqhci_ver_major(cq_host), + cqhci_ver_minor(cq_host), err); + return err; +} +EXPORT_SYMBOL(cqhci_init); + +MODULE_AUTHOR("Venkat Gopalakrishnan <venkatg@codeaurora.org>"); +MODULE_DESCRIPTION("Command Queue Host Controller Interface driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/mmc/host/cqhci.h b/drivers/mmc/host/cqhci.h new file mode 100644 index 000000000000..9e68286a07b4 --- /dev/null +++ b/drivers/mmc/host/cqhci.h @@ -0,0 +1,240 @@ +/* Copyright (c) 2015, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ +#ifndef LINUX_MMC_CQHCI_H +#define LINUX_MMC_CQHCI_H + +#include <linux/compiler.h> +#include <linux/bitops.h> +#include <linux/spinlock_types.h> +#include <linux/types.h> +#include <linux/completion.h> +#include <linux/wait.h> +#include <linux/irqreturn.h> +#include <asm/io.h> + +/* registers */ +/* version */ +#define CQHCI_VER 0x00 +#define CQHCI_VER_MAJOR(x) (((x) & GENMASK(11, 8)) >> 8) +#define CQHCI_VER_MINOR1(x) (((x) & GENMASK(7, 4)) >> 4) +#define CQHCI_VER_MINOR2(x) ((x) & GENMASK(3, 0)) + +/* capabilities */ +#define CQHCI_CAP 0x04 +/* configuration */ +#define CQHCI_CFG 0x08 +#define CQHCI_DCMD 0x00001000 +#define CQHCI_TASK_DESC_SZ 0x00000100 +#define CQHCI_ENABLE 0x00000001 + +/* control */ +#define CQHCI_CTL 0x0C +#define CQHCI_CLEAR_ALL_TASKS 0x00000100 +#define CQHCI_HALT 0x00000001 + +/* interrupt status */ +#define CQHCI_IS 0x10 +#define CQHCI_IS_HAC BIT(0) +#define CQHCI_IS_TCC BIT(1) +#define CQHCI_IS_RED BIT(2) +#define CQHCI_IS_TCL BIT(3) + +#define CQHCI_IS_MASK (CQHCI_IS_TCC | CQHCI_IS_RED) + +/* interrupt status enable */ +#define CQHCI_ISTE 0x14 + +/* interrupt signal enable */ +#define CQHCI_ISGE 0x18 + +/* interrupt coalescing */ +#define CQHCI_IC 0x1C +#define CQHCI_IC_ENABLE BIT(31) +#define CQHCI_IC_RESET BIT(16) +#define CQHCI_IC_ICCTHWEN BIT(15) +#define CQHCI_IC_ICCTH(x) (((x) & 0x1F) << 8) +#define CQHCI_IC_ICTOVALWEN BIT(7) +#define CQHCI_IC_ICTOVAL(x) ((x) & 0x7F) + +/* task list base address */ +#define CQHCI_TDLBA 0x20 + +/* task list base address upper */ +#define CQHCI_TDLBAU 0x24 + +/* door-bell */ +#define CQHCI_TDBR 0x28 + +/* task completion notification */ +#define CQHCI_TCN 0x2C + +/* device queue status */ +#define CQHCI_DQS 0x30 + +/* device pending tasks */ +#define CQHCI_DPT 0x34 + +/* task clear */ +#define CQHCI_TCLR 0x38 + +/* send status config 1 */ +#define CQHCI_SSC1 0x40 + +/* send status config 2 */ +#define CQHCI_SSC2 0x44 + +/* response for dcmd */ +#define CQHCI_CRDCT 0x48 + +/* response mode error mask */ +#define CQHCI_RMEM 0x50 + +/* task error info */ +#define CQHCI_TERRI 0x54 + +#define CQHCI_TERRI_C_INDEX(x) ((x) & GENMASK(5, 0)) +#define CQHCI_TERRI_C_TASK(x) (((x) & GENMASK(12, 8)) >> 8) +#define CQHCI_TERRI_C_VALID(x) ((x) & BIT(15)) +#define CQHCI_TERRI_D_INDEX(x) (((x) & GENMASK(21, 16)) >> 16) +#define CQHCI_TERRI_D_TASK(x) (((x) & GENMASK(28, 24)) >> 24) +#define CQHCI_TERRI_D_VALID(x) ((x) & BIT(31)) + +/* command response index */ +#define CQHCI_CRI 0x58 + +/* command response argument */ +#define CQHCI_CRA 0x5C + +#define CQHCI_INT_ALL 0xF +#define CQHCI_IC_DEFAULT_ICCTH 31 +#define CQHCI_IC_DEFAULT_ICTOVAL 1 + +/* attribute fields */ +#define CQHCI_VALID(x) (((x) & 1) << 0) +#define CQHCI_END(x) (((x) & 1) << 1) +#define CQHCI_INT(x) (((x) & 1) << 2) +#define CQHCI_ACT(x) (((x) & 0x7) << 3) + +/* data command task descriptor fields */ +#define CQHCI_FORCED_PROG(x) (((x) & 1) << 6) +#define CQHCI_CONTEXT(x) (((x) & 0xF) << 7) +#define CQHCI_DATA_TAG(x) (((x) & 1) << 11) +#define CQHCI_DATA_DIR(x) (((x) & 1) << 12) +#define CQHCI_PRIORITY(x) (((x) & 1) << 13) +#define CQHCI_QBAR(x) (((x) & 1) << 14) +#define CQHCI_REL_WRITE(x) (((x) & 1) << 15) +#define CQHCI_BLK_COUNT(x) (((x) & 0xFFFF) << 16) +#define CQHCI_BLK_ADDR(x) (((x) & 0xFFFFFFFF) << 32) + +/* direct command task descriptor fields */ +#define CQHCI_CMD_INDEX(x) (((x) & 0x3F) << 16) +#define CQHCI_CMD_TIMING(x) (((x) & 1) << 22) +#define CQHCI_RESP_TYPE(x) (((x) & 0x3) << 23) + +/* transfer descriptor fields */ +#define CQHCI_DAT_LENGTH(x) (((x) & 0xFFFF) << 16) +#define CQHCI_DAT_ADDR_LO(x) (((x) & 0xFFFFFFFF) << 32) +#define CQHCI_DAT_ADDR_HI(x) (((x) & 0xFFFFFFFF) << 0) + +struct cqhci_host_ops; +struct mmc_host; +struct cqhci_slot; + +struct cqhci_host { + const struct cqhci_host_ops *ops; + void __iomem *mmio; + struct mmc_host *mmc; + + spinlock_t lock; + + /* relative card address of device */ + unsigned int rca; + + /* 64 bit DMA */ + bool dma64; + int num_slots; + int qcnt; + + u32 dcmd_slot; + u32 caps; +#define CQHCI_TASK_DESC_SZ_128 0x1 + + u32 quirks; +#define CQHCI_QUIRK_SHORT_TXFR_DESC_SZ 0x1 + + bool enabled; + bool halted; + bool init_done; + bool activated; + bool waiting_for_idle; + bool recovery_halt; + + size_t desc_size; + size_t data_size; + + u8 *desc_base; + + /* total descriptor size */ + u8 slot_sz; + + /* 64/128 bit depends on CQHCI_CFG */ + u8 task_desc_len; + + /* 64 bit on 32-bit arch, 128 bit on 64-bit */ + u8 link_desc_len; + + u8 *trans_desc_base; + /* same length as transfer descriptor */ + u8 trans_desc_len; + + dma_addr_t desc_dma_base; + dma_addr_t trans_desc_dma_base; + + struct completion halt_comp; + wait_queue_head_t wait_queue; + struct cqhci_slot *slot; +}; + +struct cqhci_host_ops { + void (*dumpregs)(struct mmc_host *mmc); + void (*write_l)(struct cqhci_host *host, u32 val, int reg); + u32 (*read_l)(struct cqhci_host *host, int reg); + void (*enable)(struct mmc_host *mmc); + void (*disable)(struct mmc_host *mmc, bool recovery); +}; + +static inline void cqhci_writel(struct cqhci_host *host, u32 val, int reg) +{ + if (unlikely(host->ops->write_l)) + host->ops->write_l(host, val, reg); + else + writel_relaxed(val, host->mmio + reg); +} + +static inline u32 cqhci_readl(struct cqhci_host *host, int reg) +{ + if (unlikely(host->ops->read_l)) + return host->ops->read_l(host, reg); + else + return readl_relaxed(host->mmio + reg); +} + +struct platform_device; + +irqreturn_t cqhci_irq(struct mmc_host *mmc, u32 intmask, int cmd_error, + int data_error); +int cqhci_init(struct cqhci_host *cq_host, struct mmc_host *mmc, bool dma64); +struct cqhci_host *cqhci_pltfm_init(struct platform_device *pdev); +int cqhci_suspend(struct mmc_host *mmc); +int cqhci_resume(struct mmc_host *mmc); + +#endif diff --git a/drivers/mmc/host/davinci_mmc.c b/drivers/mmc/host/davinci_mmc.c index 351330dfb954..8e363174f9d6 100644 --- a/drivers/mmc/host/davinci_mmc.c +++ b/drivers/mmc/host/davinci_mmc.c @@ -174,7 +174,7 @@ module_param(poll_loopcount, uint, S_IRUGO); MODULE_PARM_DESC(poll_loopcount, "Maximum polling loop count. Default = 32"); -static unsigned __initdata use_dma = 1; +static unsigned use_dma = 1; module_param(use_dma, uint, 0); MODULE_PARM_DESC(use_dma, "Whether to use DMA or not. Default = 1"); @@ -496,8 +496,7 @@ static int mmc_davinci_start_dma_transfer(struct mmc_davinci_host *host, return ret; } -static void __init_or_module -davinci_release_dma_channels(struct mmc_davinci_host *host) +static void davinci_release_dma_channels(struct mmc_davinci_host *host) { if (!host->use_dma) return; @@ -506,7 +505,7 @@ davinci_release_dma_channels(struct mmc_davinci_host *host) dma_release_channel(host->dma_rx); } -static int __init davinci_acquire_dma_channels(struct mmc_davinci_host *host) +static int davinci_acquire_dma_channels(struct mmc_davinci_host *host) { host->dma_tx = dma_request_chan(mmc_dev(host->mmc), "tx"); if (IS_ERR(host->dma_tx)) { @@ -1201,7 +1200,7 @@ static int mmc_davinci_parse_pdata(struct mmc_host *mmc) return 0; } -static int __init davinci_mmcsd_probe(struct platform_device *pdev) +static int davinci_mmcsd_probe(struct platform_device *pdev) { const struct of_device_id *match; struct mmc_davinci_host *host = NULL; @@ -1254,8 +1253,9 @@ static int __init davinci_mmcsd_probe(struct platform_device *pdev) pdev->id_entry = match->data; ret = mmc_of_parse(mmc); if (ret) { - dev_err(&pdev->dev, - "could not parse of data: %d\n", ret); + if (ret != -EPROBE_DEFER) + dev_err(&pdev->dev, + "could not parse of data: %d\n", ret); goto parse_fail; } } else { @@ -1414,11 +1414,12 @@ static struct platform_driver davinci_mmcsd_driver = { .pm = davinci_mmcsd_pm_ops, .of_match_table = davinci_mmc_dt_ids, }, + .probe = davinci_mmcsd_probe, .remove = __exit_p(davinci_mmcsd_remove), .id_table = davinci_mmc_devtype, }; -module_platform_driver_probe(davinci_mmcsd_driver, davinci_mmcsd_probe); +module_platform_driver(davinci_mmcsd_driver); MODULE_AUTHOR("Texas Instruments India"); MODULE_LICENSE("GPL"); diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c index e0862d3f65b3..32a6a228cd12 100644 --- a/drivers/mmc/host/meson-gx-mmc.c +++ b/drivers/mmc/host/meson-gx-mmc.c @@ -1208,7 +1208,7 @@ static int meson_mmc_probe(struct platform_device *pdev) } irq = platform_get_irq(pdev, 0); - if (!irq) { + if (irq <= 0) { dev_err(&pdev->dev, "failed to get interrupt resource.\n"); ret = -EINVAL; goto free_host; diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c index e8a1bb1ae694..70b0df8b9c78 100644 --- a/drivers/mmc/host/mmci.c +++ b/drivers/mmc/host/mmci.c @@ -82,6 +82,10 @@ static unsigned int fmax = 515633; * @qcom_fifo: enables qcom specific fifo pio read logic. * @qcom_dml: enables qcom specific dma glue for dma transfers. * @reversed_irq_handling: handle data irq before cmd irq. + * @mmcimask1: true if variant have a MMCIMASK1 register. + * @start_err: bitmask identifying the STARTBITERR bit inside MMCISTATUS + * register. + * @opendrain: bitmask identifying the OPENDRAIN bit inside MMCIPOWER register */ struct variant_data { unsigned int clkreg; @@ -111,6 +115,9 @@ struct variant_data { bool qcom_fifo; bool qcom_dml; bool reversed_irq_handling; + bool mmcimask1; + u32 start_err; + u32 opendrain; }; static struct variant_data variant_arm = { @@ -120,6 +127,9 @@ static struct variant_data variant_arm = { .pwrreg_powerup = MCI_PWR_UP, .f_max = 100000000, .reversed_irq_handling = true, + .mmcimask1 = true, + .start_err = MCI_STARTBITERR, + .opendrain = MCI_ROD, }; static struct variant_data variant_arm_extended_fifo = { @@ -128,6 +138,9 @@ static struct variant_data variant_arm_extended_fifo = { .datalength_bits = 16, .pwrreg_powerup = MCI_PWR_UP, .f_max = 100000000, + .mmcimask1 = true, + .start_err = MCI_STARTBITERR, + .opendrain = MCI_ROD, }; static struct variant_data variant_arm_extended_fifo_hwfc = { @@ -137,6 +150,9 @@ static struct variant_data variant_arm_extended_fifo_hwfc = { .datalength_bits = 16, .pwrreg_powerup = MCI_PWR_UP, .f_max = 100000000, + .mmcimask1 = true, + .start_err = MCI_STARTBITERR, + .opendrain = MCI_ROD, }; static struct variant_data variant_u300 = { @@ -152,6 +168,9 @@ static struct variant_data variant_u300 = { .signal_direction = true, .pwrreg_clkgate = true, .pwrreg_nopower = true, + .mmcimask1 = true, + .start_err = MCI_STARTBITERR, + .opendrain = MCI_OD, }; static struct variant_data variant_nomadik = { @@ -168,6 +187,9 @@ static struct variant_data variant_nomadik = { .signal_direction = true, .pwrreg_clkgate = true, .pwrreg_nopower = true, + .mmcimask1 = true, + .start_err = MCI_STARTBITERR, + .opendrain = MCI_OD, }; static struct variant_data variant_ux500 = { @@ -190,6 +212,9 @@ static struct variant_data variant_ux500 = { .busy_detect_flag = MCI_ST_CARDBUSY, .busy_detect_mask = MCI_ST_BUSYENDMASK, .pwrreg_nopower = true, + .mmcimask1 = true, + .start_err = MCI_STARTBITERR, + .opendrain = MCI_OD, }; static struct variant_data variant_ux500v2 = { @@ -214,6 +239,26 @@ static struct variant_data variant_ux500v2 = { .busy_detect_flag = MCI_ST_CARDBUSY, .busy_detect_mask = MCI_ST_BUSYENDMASK, .pwrreg_nopower = true, + .mmcimask1 = true, + .start_err = MCI_STARTBITERR, + .opendrain = MCI_OD, +}; + +static struct variant_data variant_stm32 = { + .fifosize = 32 * 4, + .fifohalfsize = 8 * 4, + .clkreg = MCI_CLK_ENABLE, + .clkreg_enable = MCI_ST_UX500_HWFCEN, + .clkreg_8bit_bus_enable = MCI_ST_8BIT_BUS, + .clkreg_neg_edge_enable = MCI_ST_UX500_NEG_EDGE, + .datalength_bits = 24, + .datactrl_mask_sdio = MCI_DPSM_ST_SDIOEN, + .st_sdio = true, + .st_clkdiv = true, + .pwrreg_powerup = MCI_PWR_ON, + .f_max = 48000000, + .pwrreg_clkgate = true, + .pwrreg_nopower = true, }; static struct variant_data variant_qcom = { @@ -232,6 +277,9 @@ static struct variant_data variant_qcom = { .explicit_mclk_control = true, .qcom_fifo = true, .qcom_dml = true, + .mmcimask1 = true, + .start_err = MCI_STARTBITERR, + .opendrain = MCI_ROD, }; /* Busy detection for the ST Micro variant */ @@ -396,6 +444,7 @@ mmci_request_end(struct mmci_host *host, struct mmc_request *mrq) static void mmci_set_mask1(struct mmci_host *host, unsigned int mask) { void __iomem *base = host->base; + struct variant_data *variant = host->variant; if (host->singleirq) { unsigned int mask0 = readl(base + MMCIMASK0); @@ -406,7 +455,10 @@ static void mmci_set_mask1(struct mmci_host *host, unsigned int mask) writel(mask0, base + MMCIMASK0); } - writel(mask, base + MMCIMASK1); + if (variant->mmcimask1) + writel(mask, base + MMCIMASK1); + + host->mask1_reg = mask; } static void mmci_stop_data(struct mmci_host *host) @@ -921,8 +973,9 @@ mmci_data_irq(struct mmci_host *host, struct mmc_data *data, return; /* First check for errors */ - if (status & (MCI_DATACRCFAIL|MCI_DATATIMEOUT|MCI_STARTBITERR| - MCI_TXUNDERRUN|MCI_RXOVERRUN)) { + if (status & (MCI_DATACRCFAIL | MCI_DATATIMEOUT | + host->variant->start_err | + MCI_TXUNDERRUN | MCI_RXOVERRUN)) { u32 remain, success; /* Terminate the DMA transfer */ @@ -1286,7 +1339,7 @@ static irqreturn_t mmci_irq(int irq, void *dev_id) status = readl(host->base + MMCISTATUS); if (host->singleirq) { - if (status & readl(host->base + MMCIMASK1)) + if (status & host->mask1_reg) mmci_pio_irq(irq, dev_id); status &= ~MCI_IRQ1MASK; @@ -1429,16 +1482,18 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) ~MCI_ST_DATA2DIREN); } - if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN) { - if (host->hw_designer != AMBA_VENDOR_ST) - pwr |= MCI_ROD; - else { - /* - * The ST Micro variant use the ROD bit for something - * else and only has OD (Open Drain). - */ - pwr |= MCI_OD; - } + if (variant->opendrain) { + if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN) + pwr |= variant->opendrain; + } else { + /* + * If the variant cannot configure the pads by its own, then we + * expect the pinctrl to be able to do that for us + */ + if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN) + pinctrl_select_state(host->pinctrl, host->pins_opendrain); + else + pinctrl_select_state(host->pinctrl, host->pins_default); } /* @@ -1583,6 +1638,35 @@ static int mmci_probe(struct amba_device *dev, host = mmc_priv(mmc); host->mmc = mmc; + /* + * Some variant (STM32) doesn't have opendrain bit, nevertheless + * pins can be set accordingly using pinctrl + */ + if (!variant->opendrain) { + host->pinctrl = devm_pinctrl_get(&dev->dev); + if (IS_ERR(host->pinctrl)) { + dev_err(&dev->dev, "failed to get pinctrl"); + ret = PTR_ERR(host->pinctrl); + goto host_free; + } + + host->pins_default = pinctrl_lookup_state(host->pinctrl, + PINCTRL_STATE_DEFAULT); + if (IS_ERR(host->pins_default)) { + dev_err(mmc_dev(mmc), "Can't select default pins\n"); + ret = PTR_ERR(host->pins_default); + goto host_free; + } + + host->pins_opendrain = pinctrl_lookup_state(host->pinctrl, + MMCI_PINCTRL_STATE_OPENDRAIN); + if (IS_ERR(host->pins_opendrain)) { + dev_err(mmc_dev(mmc), "Can't select opendrain pins\n"); + ret = PTR_ERR(host->pins_opendrain); + goto host_free; + } + } + host->hw_designer = amba_manf(dev); host->hw_revision = amba_rev(dev); dev_dbg(mmc_dev(mmc), "designer ID = 0x%02x\n", host->hw_designer); @@ -1729,7 +1813,10 @@ static int mmci_probe(struct amba_device *dev, spin_lock_init(&host->lock); writel(0, host->base + MMCIMASK0); - writel(0, host->base + MMCIMASK1); + + if (variant->mmcimask1) + writel(0, host->base + MMCIMASK1); + writel(0xfff, host->base + MMCICLEAR); /* @@ -1809,6 +1896,7 @@ static int mmci_remove(struct amba_device *dev) if (mmc) { struct mmci_host *host = mmc_priv(mmc); + struct variant_data *variant = host->variant; /* * Undo pm_runtime_put() in probe. We use the _sync @@ -1819,7 +1907,9 @@ static int mmci_remove(struct amba_device *dev) mmc_remove_host(mmc); writel(0, host->base + MMCIMASK0); - writel(0, host->base + MMCIMASK1); + + if (variant->mmcimask1) + writel(0, host->base + MMCIMASK1); writel(0, host->base + MMCICOMMAND); writel(0, host->base + MMCIDATACTRL); @@ -1951,6 +2041,11 @@ static const struct amba_id mmci_ids[] = { .mask = 0xf0ffffff, .data = &variant_ux500v2, }, + { + .id = 0x00880180, + .mask = 0x00ffffff, + .data = &variant_stm32, + }, /* Qualcomm variants */ { .id = 0x00051180, diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h index 4a8bef1aac8f..f91cdf7f6dae 100644 --- a/drivers/mmc/host/mmci.h +++ b/drivers/mmc/host/mmci.h @@ -192,6 +192,8 @@ #define NR_SG 128 +#define MMCI_PINCTRL_STATE_OPENDRAIN "opendrain" + struct clk; struct variant_data; struct dma_chan; @@ -223,9 +225,13 @@ struct mmci_host { u32 clk_reg; u32 datactrl_reg; u32 busy_status; + u32 mask1_reg; bool vqmmc_enabled; struct mmci_platform_data *plat; struct variant_data *variant; + struct pinctrl *pinctrl; + struct pinctrl_state *pins_default; + struct pinctrl_state *pins_opendrain; u8 hw_designer; u8 hw_revision:4; diff --git a/drivers/mmc/host/renesas_sdhi.h b/drivers/mmc/host/renesas_sdhi.h index b9dfea5d8193..f13f798d8506 100644 --- a/drivers/mmc/host/renesas_sdhi.h +++ b/drivers/mmc/host/renesas_sdhi.h @@ -35,6 +35,28 @@ struct renesas_sdhi_of_data { unsigned short max_segs; }; +struct tmio_mmc_dma { + enum dma_slave_buswidth dma_buswidth; + bool (*filter)(struct dma_chan *chan, void *arg); + void (*enable)(struct tmio_mmc_host *host, bool enable); + struct completion dma_dataend; + struct tasklet_struct dma_complete; +}; + +struct renesas_sdhi { + struct clk *clk; + struct clk *clk_cd; + struct tmio_mmc_data mmc_data; + struct tmio_mmc_dma dma_priv; + struct pinctrl *pinctrl; + struct pinctrl_state *pins_default, *pins_uhs; + void __iomem *scc_ctl; + u32 scc_tappos; +}; + +#define host_to_priv(host) \ + container_of((host)->pdata, struct renesas_sdhi, mmc_data) + int renesas_sdhi_probe(struct platform_device *pdev, const struct tmio_mmc_dma_ops *dma_ops); int renesas_sdhi_remove(struct platform_device *pdev); diff --git a/drivers/mmc/host/renesas_sdhi_core.c b/drivers/mmc/host/renesas_sdhi_core.c index 157e1d9e7725..80943fa07db6 100644 --- a/drivers/mmc/host/renesas_sdhi_core.c +++ b/drivers/mmc/host/renesas_sdhi_core.c @@ -47,19 +47,6 @@ #define SDHI_VER_GEN3_SD 0xcc10 #define SDHI_VER_GEN3_SDMMC 0xcd10 -#define host_to_priv(host) \ - container_of((host)->pdata, struct renesas_sdhi, mmc_data) - -struct renesas_sdhi { - struct clk *clk; - struct clk *clk_cd; - struct tmio_mmc_data mmc_data; - struct tmio_mmc_dma dma_priv; - struct pinctrl *pinctrl; - struct pinctrl_state *pins_default, *pins_uhs; - void __iomem *scc_ctl; -}; - static void renesas_sdhi_sdbuf_width(struct tmio_mmc_host *host, int width) { u32 val; @@ -281,7 +268,7 @@ static unsigned int renesas_sdhi_init_tuning(struct tmio_mmc_host *host) ~SH_MOBILE_SDHI_SCC_RVSCNTL_RVSEN & sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL)); - sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_DT2FF, host->scc_tappos); + sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_DT2FF, priv->scc_tappos); /* Read TAPNUM */ return (sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_DTCNTL) >> @@ -498,7 +485,7 @@ int renesas_sdhi_probe(struct platform_device *pdev, if (IS_ERR(priv->clk)) { ret = PTR_ERR(priv->clk); dev_err(&pdev->dev, "cannot get clock: %d\n", ret); - goto eprobe; + return ret; } /* @@ -524,11 +511,9 @@ int renesas_sdhi_probe(struct platform_device *pdev, "state_uhs"); } - host = tmio_mmc_host_alloc(pdev); - if (!host) { - ret = -ENOMEM; - goto eprobe; - } + host = tmio_mmc_host_alloc(pdev, mmc_data); + if (IS_ERR(host)) + return PTR_ERR(host); if (of_data) { mmc_data->flags |= of_data->tmio_flags; @@ -542,18 +527,18 @@ int renesas_sdhi_probe(struct platform_device *pdev, host->bus_shift = of_data->bus_shift; } - host->dma = dma_priv; host->write16_hook = renesas_sdhi_write16_hook; host->clk_enable = renesas_sdhi_clk_enable; host->clk_update = renesas_sdhi_clk_update; host->clk_disable = renesas_sdhi_clk_disable; host->multi_io_quirk = renesas_sdhi_multi_io_quirk; + host->dma_ops = dma_ops; /* SDR speeds are only available on Gen2+ */ if (mmc_data->flags & TMIO_MMC_MIN_RCAR2) { /* card_busy caused issues on r8a73a4 (pre-Gen2) CD-less SDHI */ - host->card_busy = renesas_sdhi_card_busy; - host->start_signal_voltage_switch = + host->ops.card_busy = renesas_sdhi_card_busy; + host->ops.start_signal_voltage_switch = renesas_sdhi_start_signal_voltage_switch; } @@ -587,10 +572,14 @@ int renesas_sdhi_probe(struct platform_device *pdev, /* All SDHI have SDIO status bits which must be 1 */ mmc_data->flags |= TMIO_MMC_SDIO_STATUS_SETBITS; - ret = tmio_mmc_host_probe(host, mmc_data, dma_ops); - if (ret < 0) + ret = renesas_sdhi_clk_enable(host); + if (ret) goto efree; + ret = tmio_mmc_host_probe(host); + if (ret < 0) + goto edisclk; + /* One Gen2 SDHI incarnation does NOT have a CBSY bit */ if (sd_ctrl_read16(host, CTL_VERSION) == SDHI_VER_GEN2_SDR50) mmc_data->flags &= ~TMIO_MMC_HAVE_CBSY; @@ -607,7 +596,7 @@ int renesas_sdhi_probe(struct platform_device *pdev, for (i = 0; i < of_data->taps_num; i++) { if (taps[i].clk_rate == 0 || taps[i].clk_rate == host->mmc->f_max) { - host->scc_tappos = taps->tap; + priv->scc_tappos = taps->tap; hit = true; break; } @@ -651,19 +640,21 @@ int renesas_sdhi_probe(struct platform_device *pdev, eirq: tmio_mmc_host_remove(host); +edisclk: + renesas_sdhi_clk_disable(host); efree: tmio_mmc_host_free(host); -eprobe: + return ret; } EXPORT_SYMBOL_GPL(renesas_sdhi_probe); int renesas_sdhi_remove(struct platform_device *pdev) { - struct mmc_host *mmc = platform_get_drvdata(pdev); - struct tmio_mmc_host *host = mmc_priv(mmc); + struct tmio_mmc_host *host = platform_get_drvdata(pdev); tmio_mmc_host_remove(host); + renesas_sdhi_clk_disable(host); return 0; } diff --git a/drivers/mmc/host/renesas_sdhi_internal_dmac.c b/drivers/mmc/host/renesas_sdhi_internal_dmac.c index 41cbe84c1d18..7c03cfead6f9 100644 --- a/drivers/mmc/host/renesas_sdhi_internal_dmac.c +++ b/drivers/mmc/host/renesas_sdhi_internal_dmac.c @@ -103,6 +103,8 @@ renesas_sdhi_internal_dmac_dm_write(struct tmio_mmc_host *host, static void renesas_sdhi_internal_dmac_enable_dma(struct tmio_mmc_host *host, bool enable) { + struct renesas_sdhi *priv = host_to_priv(host); + if (!host->chan_tx || !host->chan_rx) return; @@ -110,8 +112,8 @@ renesas_sdhi_internal_dmac_enable_dma(struct tmio_mmc_host *host, bool enable) renesas_sdhi_internal_dmac_dm_write(host, DM_CM_INFO1, INFO1_CLEAR); - if (host->dma->enable) - host->dma->enable(host, enable); + if (priv->dma_priv.enable) + priv->dma_priv.enable(host, enable); } static void @@ -130,7 +132,9 @@ renesas_sdhi_internal_dmac_abort_dma(struct tmio_mmc_host *host) { static void renesas_sdhi_internal_dmac_dataend_dma(struct tmio_mmc_host *host) { - tasklet_schedule(&host->dma_complete); + struct renesas_sdhi *priv = host_to_priv(host); + + tasklet_schedule(&priv->dma_priv.dma_complete); } static void @@ -220,10 +224,12 @@ static void renesas_sdhi_internal_dmac_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata) { + struct renesas_sdhi *priv = host_to_priv(host); + /* Each value is set to non-zero to assume "enabling" each DMA */ host->chan_rx = host->chan_tx = (void *)0xdeadbeaf; - tasklet_init(&host->dma_complete, + tasklet_init(&priv->dma_priv.dma_complete, renesas_sdhi_internal_dmac_complete_tasklet_fn, (unsigned long)host); tasklet_init(&host->dma_issue, @@ -255,6 +261,7 @@ static const struct soc_device_attribute gen3_soc_whitelist[] = { { .soc_id = "r8a7795", .revision = "ES1.*" }, { .soc_id = "r8a7795", .revision = "ES2.0" }, { .soc_id = "r8a7796", .revision = "ES1.0" }, + { .soc_id = "r8a77995", .revision = "ES1.0" }, { /* sentinel */ } }; diff --git a/drivers/mmc/host/renesas_sdhi_sys_dmac.c b/drivers/mmc/host/renesas_sdhi_sys_dmac.c index 9ab10436e4b8..82d757c480b2 100644 --- a/drivers/mmc/host/renesas_sdhi_sys_dmac.c +++ b/drivers/mmc/host/renesas_sdhi_sys_dmac.c @@ -117,11 +117,13 @@ MODULE_DEVICE_TABLE(of, renesas_sdhi_sys_dmac_of_match); static void renesas_sdhi_sys_dmac_enable_dma(struct tmio_mmc_host *host, bool enable) { + struct renesas_sdhi *priv = host_to_priv(host); + if (!host->chan_tx || !host->chan_rx) return; - if (host->dma->enable) - host->dma->enable(host, enable); + if (priv->dma_priv.enable) + priv->dma_priv.enable(host, enable); } static void renesas_sdhi_sys_dmac_abort_dma(struct tmio_mmc_host *host) @@ -138,12 +140,15 @@ static void renesas_sdhi_sys_dmac_abort_dma(struct tmio_mmc_host *host) static void renesas_sdhi_sys_dmac_dataend_dma(struct tmio_mmc_host *host) { - complete(&host->dma_dataend); + struct renesas_sdhi *priv = host_to_priv(host); + + complete(&priv->dma_priv.dma_dataend); } static void renesas_sdhi_sys_dmac_dma_callback(void *arg) { struct tmio_mmc_host *host = arg; + struct renesas_sdhi *priv = host_to_priv(host); spin_lock_irq(&host->lock); @@ -161,7 +166,7 @@ static void renesas_sdhi_sys_dmac_dma_callback(void *arg) spin_unlock_irq(&host->lock); - wait_for_completion(&host->dma_dataend); + wait_for_completion(&priv->dma_priv.dma_dataend); spin_lock_irq(&host->lock); tmio_mmc_do_data_irq(host); @@ -171,6 +176,7 @@ out: static void renesas_sdhi_sys_dmac_start_dma_rx(struct tmio_mmc_host *host) { + struct renesas_sdhi *priv = host_to_priv(host); struct scatterlist *sg = host->sg_ptr, *sg_tmp; struct dma_async_tx_descriptor *desc = NULL; struct dma_chan *chan = host->chan_rx; @@ -214,7 +220,7 @@ static void renesas_sdhi_sys_dmac_start_dma_rx(struct tmio_mmc_host *host) DMA_CTRL_ACK); if (desc) { - reinit_completion(&host->dma_dataend); + reinit_completion(&priv->dma_priv.dma_dataend); desc->callback = renesas_sdhi_sys_dmac_dma_callback; desc->callback_param = host; @@ -245,6 +251,7 @@ pio: static void renesas_sdhi_sys_dmac_start_dma_tx(struct tmio_mmc_host *host) { + struct renesas_sdhi *priv = host_to_priv(host); struct scatterlist *sg = host->sg_ptr, *sg_tmp; struct dma_async_tx_descriptor *desc = NULL; struct dma_chan *chan = host->chan_tx; @@ -293,7 +300,7 @@ static void renesas_sdhi_sys_dmac_start_dma_tx(struct tmio_mmc_host *host) DMA_CTRL_ACK); if (desc) { - reinit_completion(&host->dma_dataend); + reinit_completion(&priv->dma_priv.dma_dataend); desc->callback = renesas_sdhi_sys_dmac_dma_callback; desc->callback_param = host; @@ -341,7 +348,7 @@ static void renesas_sdhi_sys_dmac_issue_tasklet_fn(unsigned long priv) spin_lock_irq(&host->lock); - if (host && host->data) { + if (host->data) { if (host->data->flags & MMC_DATA_READ) chan = host->chan_rx; else @@ -359,9 +366,11 @@ static void renesas_sdhi_sys_dmac_issue_tasklet_fn(unsigned long priv) static void renesas_sdhi_sys_dmac_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata) { + struct renesas_sdhi *priv = host_to_priv(host); + /* We can only either use DMA for both Tx and Rx or not use it at all */ - if (!host->dma || (!host->pdev->dev.of_node && - (!pdata->chan_priv_tx || !pdata->chan_priv_rx))) + if (!host->pdev->dev.of_node && + (!pdata->chan_priv_tx || !pdata->chan_priv_rx)) return; if (!host->chan_tx && !host->chan_rx) { @@ -378,7 +387,7 @@ static void renesas_sdhi_sys_dmac_request_dma(struct tmio_mmc_host *host, dma_cap_set(DMA_SLAVE, mask); host->chan_tx = dma_request_slave_channel_compat(mask, - host->dma->filter, pdata->chan_priv_tx, + priv->dma_priv.filter, pdata->chan_priv_tx, &host->pdev->dev, "tx"); dev_dbg(&host->pdev->dev, "%s: TX: got channel %p\n", __func__, host->chan_tx); @@ -389,7 +398,7 @@ static void renesas_sdhi_sys_dmac_request_dma(struct tmio_mmc_host *host, cfg.direction = DMA_MEM_TO_DEV; cfg.dst_addr = res->start + (CTL_SD_DATA_PORT << host->bus_shift); - cfg.dst_addr_width = host->dma->dma_buswidth; + cfg.dst_addr_width = priv->dma_priv.dma_buswidth; if (!cfg.dst_addr_width) cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES; cfg.src_addr = 0; @@ -398,7 +407,7 @@ static void renesas_sdhi_sys_dmac_request_dma(struct tmio_mmc_host *host, goto ecfgtx; host->chan_rx = dma_request_slave_channel_compat(mask, - host->dma->filter, pdata->chan_priv_rx, + priv->dma_priv.filter, pdata->chan_priv_rx, &host->pdev->dev, "rx"); dev_dbg(&host->pdev->dev, "%s: RX: got channel %p\n", __func__, host->chan_rx); @@ -408,7 +417,7 @@ static void renesas_sdhi_sys_dmac_request_dma(struct tmio_mmc_host *host, cfg.direction = DMA_DEV_TO_MEM; cfg.src_addr = cfg.dst_addr + host->pdata->dma_rx_offset; - cfg.src_addr_width = host->dma->dma_buswidth; + cfg.src_addr_width = priv->dma_priv.dma_buswidth; if (!cfg.src_addr_width) cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES; cfg.dst_addr = 0; @@ -420,7 +429,7 @@ static void renesas_sdhi_sys_dmac_request_dma(struct tmio_mmc_host *host, if (!host->bounce_buf) goto ebouncebuf; - init_completion(&host->dma_dataend); + init_completion(&priv->dma_priv.dma_dataend); tasklet_init(&host->dma_issue, renesas_sdhi_sys_dmac_issue_tasklet_fn, (unsigned long)host); diff --git a/drivers/mmc/host/s3cmci.c b/drivers/mmc/host/s3cmci.c index 555c7f133eb8..f77493604312 100644 --- a/drivers/mmc/host/s3cmci.c +++ b/drivers/mmc/host/s3cmci.c @@ -1660,7 +1660,7 @@ static int s3cmci_probe(struct platform_device *pdev) } host->irq = platform_get_irq(pdev, 0); - if (host->irq == 0) { + if (host->irq <= 0) { dev_err(&pdev->dev, "failed to get interrupt resource.\n"); ret = -EINVAL; goto probe_iounmap; diff --git a/drivers/mmc/host/sdhci-acpi.c b/drivers/mmc/host/sdhci-acpi.c index b988997a1e80..4065da58789d 100644 --- a/drivers/mmc/host/sdhci-acpi.c +++ b/drivers/mmc/host/sdhci-acpi.c @@ -76,6 +76,7 @@ struct sdhci_acpi_slot { size_t priv_size; int (*probe_slot)(struct platform_device *, const char *, const char *); int (*remove_slot)(struct platform_device *); + int (*setup_host)(struct platform_device *pdev); }; struct sdhci_acpi_host { @@ -96,14 +97,21 @@ static inline bool sdhci_acpi_flag(struct sdhci_acpi_host *c, unsigned int flag) return c->slot && (c->slot->flags & flag); } +#define INTEL_DSM_HS_CAPS_SDR25 BIT(0) +#define INTEL_DSM_HS_CAPS_DDR50 BIT(1) +#define INTEL_DSM_HS_CAPS_SDR50 BIT(2) +#define INTEL_DSM_HS_CAPS_SDR104 BIT(3) + enum { INTEL_DSM_FNS = 0, INTEL_DSM_V18_SWITCH = 3, INTEL_DSM_V33_SWITCH = 4, + INTEL_DSM_HS_CAPS = 8, }; struct intel_host { u32 dsm_fns; + u32 hs_caps; }; static const guid_t intel_dsm_guid = @@ -152,6 +160,8 @@ static void intel_dsm_init(struct intel_host *intel_host, struct device *dev, { int err; + intel_host->hs_caps = ~0; + err = __intel_dsm(intel_host, dev, INTEL_DSM_FNS, &intel_host->dsm_fns); if (err) { pr_debug("%s: DSM not supported, error %d\n", @@ -161,6 +171,8 @@ static void intel_dsm_init(struct intel_host *intel_host, struct device *dev, pr_debug("%s: DSM function mask %#x\n", mmc_hostname(mmc), intel_host->dsm_fns); + + intel_dsm(intel_host, dev, INTEL_DSM_HS_CAPS, &intel_host->hs_caps); } static int intel_start_signal_voltage_switch(struct mmc_host *mmc, @@ -398,6 +410,26 @@ static int intel_probe_slot(struct platform_device *pdev, const char *hid, return 0; } +static int intel_setup_host(struct platform_device *pdev) +{ + struct sdhci_acpi_host *c = platform_get_drvdata(pdev); + struct intel_host *intel_host = sdhci_acpi_priv(c); + + if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_SDR25)) + c->host->mmc->caps &= ~MMC_CAP_UHS_SDR25; + + if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_SDR50)) + c->host->mmc->caps &= ~MMC_CAP_UHS_SDR50; + + if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_DDR50)) + c->host->mmc->caps &= ~MMC_CAP_UHS_DDR50; + + if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_SDR104)) + c->host->mmc->caps &= ~MMC_CAP_UHS_SDR104; + + return 0; +} + static const struct sdhci_acpi_slot sdhci_acpi_slot_int_emmc = { .chip = &sdhci_acpi_chip_int, .caps = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE | @@ -409,6 +441,7 @@ static const struct sdhci_acpi_slot sdhci_acpi_slot_int_emmc = { SDHCI_QUIRK2_STOP_WITH_TC | SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400, .probe_slot = intel_probe_slot, + .setup_host = intel_setup_host, .priv_size = sizeof(struct intel_host), }; @@ -421,6 +454,7 @@ static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sdio = { .flags = SDHCI_ACPI_RUNTIME_PM, .pm_caps = MMC_PM_KEEP_POWER, .probe_slot = intel_probe_slot, + .setup_host = intel_setup_host, .priv_size = sizeof(struct intel_host), }; @@ -432,6 +466,7 @@ static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sd = { SDHCI_QUIRK2_STOP_WITH_TC, .caps = MMC_CAP_WAIT_WHILE_BUSY | MMC_CAP_AGGRESSIVE_PM, .probe_slot = intel_probe_slot, + .setup_host = intel_setup_host, .priv_size = sizeof(struct intel_host), }; @@ -446,6 +481,83 @@ static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd = { .caps = MMC_CAP_NONREMOVABLE, }; +/* AMD sdhci reset dll register. */ +#define SDHCI_AMD_RESET_DLL_REGISTER 0x908 + +static int amd_select_drive_strength(struct mmc_card *card, + unsigned int max_dtr, int host_drv, + int card_drv, int *drv_type) +{ + return MMC_SET_DRIVER_TYPE_A; +} + +static void sdhci_acpi_amd_hs400_dll(struct sdhci_host *host) +{ + /* AMD Platform requires dll setting */ + sdhci_writel(host, 0x40003210, SDHCI_AMD_RESET_DLL_REGISTER); + usleep_range(10, 20); + sdhci_writel(host, 0x40033210, SDHCI_AMD_RESET_DLL_REGISTER); +} + +/* + * For AMD Platform it is required to disable the tuning + * bit first controller to bring to HS Mode from HS200 + * mode, later enable to tune to HS400 mode. + */ +static void amd_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) +{ + struct sdhci_host *host = mmc_priv(mmc); + unsigned int old_timing = host->timing; + + sdhci_set_ios(mmc, ios); + if (old_timing == MMC_TIMING_MMC_HS200 && + ios->timing == MMC_TIMING_MMC_HS) + sdhci_writew(host, 0x9, SDHCI_HOST_CONTROL2); + if (old_timing != MMC_TIMING_MMC_HS400 && + ios->timing == MMC_TIMING_MMC_HS400) { + sdhci_writew(host, 0x80, SDHCI_HOST_CONTROL2); + sdhci_acpi_amd_hs400_dll(host); + } +} + +static const struct sdhci_ops sdhci_acpi_ops_amd = { + .set_clock = sdhci_set_clock, + .set_bus_width = sdhci_set_bus_width, + .reset = sdhci_reset, + .set_uhs_signaling = sdhci_set_uhs_signaling, +}; + +static const struct sdhci_acpi_chip sdhci_acpi_chip_amd = { + .ops = &sdhci_acpi_ops_amd, +}; + +static int sdhci_acpi_emmc_amd_probe_slot(struct platform_device *pdev, + const char *hid, const char *uid) +{ + struct sdhci_acpi_host *c = platform_get_drvdata(pdev); + struct sdhci_host *host = c->host; + + sdhci_read_caps(host); + if (host->caps1 & SDHCI_SUPPORT_DDR50) + host->mmc->caps = MMC_CAP_1_8V_DDR; + + if ((host->caps1 & SDHCI_SUPPORT_SDR104) && + (host->mmc->caps & MMC_CAP_1_8V_DDR)) + host->mmc->caps2 = MMC_CAP2_HS400_1_8V; + + host->mmc_host_ops.select_drive_strength = amd_select_drive_strength; + host->mmc_host_ops.set_ios = amd_set_ios; + return 0; +} + +static const struct sdhci_acpi_slot sdhci_acpi_slot_amd_emmc = { + .chip = &sdhci_acpi_chip_amd, + .caps = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE, + .quirks = SDHCI_QUIRK_32BIT_DMA_ADDR | SDHCI_QUIRK_32BIT_DMA_SIZE | + SDHCI_QUIRK_32BIT_ADMA_SIZE, + .probe_slot = sdhci_acpi_emmc_amd_probe_slot, +}; + struct sdhci_acpi_uid_slot { const char *hid; const char *uid; @@ -469,6 +581,7 @@ static const struct sdhci_acpi_uid_slot sdhci_acpi_uids[] = { { "PNP0D40" }, { "QCOM8051", NULL, &sdhci_acpi_slot_qcom_sd_3v }, { "QCOM8052", NULL, &sdhci_acpi_slot_qcom_sd }, + { "AMDI0040", NULL, &sdhci_acpi_slot_amd_emmc }, { }, }; @@ -485,6 +598,7 @@ static const struct acpi_device_id sdhci_acpi_ids[] = { { "PNP0D40" }, { "QCOM8051" }, { "QCOM8052" }, + { "AMDI0040" }, { }, }; MODULE_DEVICE_TABLE(acpi, sdhci_acpi_ids); @@ -566,6 +680,10 @@ static int sdhci_acpi_probe(struct platform_device *pdev) host->hw_name = "ACPI"; host->ops = &sdhci_acpi_ops_dflt; host->irq = platform_get_irq(pdev, 0); + if (host->irq <= 0) { + err = -EINVAL; + goto err_free; + } host->ioaddr = devm_ioremap_nocache(dev, iomem->start, resource_size(iomem)); @@ -609,10 +727,20 @@ static int sdhci_acpi_probe(struct platform_device *pdev) } } - err = sdhci_add_host(host); + err = sdhci_setup_host(host); if (err) goto err_free; + if (c->slot && c->slot->setup_host) { + err = c->slot->setup_host(pdev); + if (err) + goto err_cleanup; + } + + err = __sdhci_add_host(host); + if (err) + goto err_cleanup; + if (c->use_runtime_pm) { pm_runtime_set_active(dev); pm_suspend_ignore_children(dev, 1); @@ -625,6 +753,8 @@ static int sdhci_acpi_probe(struct platform_device *pdev) return 0; +err_cleanup: + sdhci_cleanup_host(c->host); err_free: sdhci_free_host(c->host); return err; diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c index 8b941f814472..cd2b5f643a15 100644 --- a/drivers/mmc/host/sdhci-esdhc-imx.c +++ b/drivers/mmc/host/sdhci-esdhc-imx.c @@ -193,6 +193,7 @@ struct pltfm_imx_data { struct clk *clk_ipg; struct clk *clk_ahb; struct clk *clk_per; + unsigned int actual_clock; enum { NO_CMD_PENDING, /* no multiblock command pending */ MULTIBLK_IN_PROCESS, /* exact multiblock cmd in process */ @@ -1403,11 +1404,15 @@ static int sdhci_esdhc_runtime_suspend(struct device *dev) int ret; ret = sdhci_runtime_suspend_host(host); + if (ret) + return ret; if (host->tuning_mode != SDHCI_TUNING_MODE_3) mmc_retune_needed(host->mmc); if (!sdhci_sdio_irq_enabled(host)) { + imx_data->actual_clock = host->mmc->actual_clock; + esdhc_pltfm_set_clock(host, 0); clk_disable_unprepare(imx_data->clk_per); clk_disable_unprepare(imx_data->clk_ipg); } @@ -1423,31 +1428,34 @@ static int sdhci_esdhc_runtime_resume(struct device *dev) struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host); int err; + err = clk_prepare_enable(imx_data->clk_ahb); + if (err) + return err; + if (!sdhci_sdio_irq_enabled(host)) { err = clk_prepare_enable(imx_data->clk_per); if (err) - return err; + goto disable_ahb_clk; err = clk_prepare_enable(imx_data->clk_ipg); if (err) goto disable_per_clk; + esdhc_pltfm_set_clock(host, imx_data->actual_clock); } - err = clk_prepare_enable(imx_data->clk_ahb); - if (err) - goto disable_ipg_clk; + err = sdhci_runtime_resume_host(host); if (err) - goto disable_ahb_clk; + goto disable_ipg_clk; return 0; -disable_ahb_clk: - clk_disable_unprepare(imx_data->clk_ahb); disable_ipg_clk: if (!sdhci_sdio_irq_enabled(host)) clk_disable_unprepare(imx_data->clk_ipg); disable_per_clk: if (!sdhci_sdio_irq_enabled(host)) clk_disable_unprepare(imx_data->clk_per); +disable_ahb_clk: + clk_disable_unprepare(imx_data->clk_ahb); return err; } #endif diff --git a/drivers/mmc/host/sdhci-of-arasan.c b/drivers/mmc/host/sdhci-of-arasan.c index 0720ea717011..c33a5f7393bd 100644 --- a/drivers/mmc/host/sdhci-of-arasan.c +++ b/drivers/mmc/host/sdhci-of-arasan.c @@ -25,11 +25,13 @@ #include <linux/of_device.h> #include <linux/phy/phy.h> #include <linux/regmap.h> -#include "sdhci-pltfm.h" #include <linux/of.h> -#define SDHCI_ARASAN_VENDOR_REGISTER 0x78 +#include "cqhci.h" +#include "sdhci-pltfm.h" +#define SDHCI_ARASAN_VENDOR_REGISTER 0x78 +#define SDHCI_ARASAN_CQE_BASE_ADDR 0x200 #define VENDOR_ENHANCED_STROBE BIT(0) #define PHY_CLK_TOO_SLOW_HZ 400000 @@ -90,6 +92,7 @@ struct sdhci_arasan_data { struct phy *phy; bool is_phy_on; + bool has_cqe; struct clk_hw sdcardclk_hw; struct clk *sdcardclk; @@ -262,6 +265,17 @@ static int sdhci_arasan_voltage_switch(struct mmc_host *mmc, return -EINVAL; } +static void sdhci_arasan_set_power(struct sdhci_host *host, unsigned char mode, + unsigned short vdd) +{ + if (!IS_ERR(host->mmc->supply.vmmc)) { + struct mmc_host *mmc = host->mmc; + + mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd); + } + sdhci_set_power_noreg(host, mode, vdd); +} + static const struct sdhci_ops sdhci_arasan_ops = { .set_clock = sdhci_arasan_set_clock, .get_max_clock = sdhci_pltfm_clk_get_max_clock, @@ -269,6 +283,7 @@ static const struct sdhci_ops sdhci_arasan_ops = { .set_bus_width = sdhci_set_bus_width, .reset = sdhci_arasan_reset, .set_uhs_signaling = sdhci_set_uhs_signaling, + .set_power = sdhci_arasan_set_power, }; static const struct sdhci_pltfm_data sdhci_arasan_pdata = { @@ -278,6 +293,62 @@ static const struct sdhci_pltfm_data sdhci_arasan_pdata = { SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN, }; +static u32 sdhci_arasan_cqhci_irq(struct sdhci_host *host, u32 intmask) +{ + int cmd_error = 0; + int data_error = 0; + + if (!sdhci_cqe_irq(host, intmask, &cmd_error, &data_error)) + return intmask; + + cqhci_irq(host->mmc, intmask, cmd_error, data_error); + + return 0; +} + +static void sdhci_arasan_dumpregs(struct mmc_host *mmc) +{ + sdhci_dumpregs(mmc_priv(mmc)); +} + +static void sdhci_arasan_cqe_enable(struct mmc_host *mmc) +{ + struct sdhci_host *host = mmc_priv(mmc); + u32 reg; + + reg = sdhci_readl(host, SDHCI_PRESENT_STATE); + while (reg & SDHCI_DATA_AVAILABLE) { + sdhci_readl(host, SDHCI_BUFFER); + reg = sdhci_readl(host, SDHCI_PRESENT_STATE); + } + + sdhci_cqe_enable(mmc); +} + +static const struct cqhci_host_ops sdhci_arasan_cqhci_ops = { + .enable = sdhci_arasan_cqe_enable, + .disable = sdhci_cqe_disable, + .dumpregs = sdhci_arasan_dumpregs, +}; + +static const struct sdhci_ops sdhci_arasan_cqe_ops = { + .set_clock = sdhci_arasan_set_clock, + .get_max_clock = sdhci_pltfm_clk_get_max_clock, + .get_timeout_clock = sdhci_pltfm_clk_get_max_clock, + .set_bus_width = sdhci_set_bus_width, + .reset = sdhci_arasan_reset, + .set_uhs_signaling = sdhci_set_uhs_signaling, + .set_power = sdhci_arasan_set_power, + .irq = sdhci_arasan_cqhci_irq, +}; + +static const struct sdhci_pltfm_data sdhci_arasan_cqe_pdata = { + .ops = &sdhci_arasan_cqe_ops, + .quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN, + .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN | + SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN, +}; + #ifdef CONFIG_PM_SLEEP /** * sdhci_arasan_suspend - Suspend method for the driver @@ -297,6 +368,12 @@ static int sdhci_arasan_suspend(struct device *dev) if (host->tuning_mode != SDHCI_TUNING_MODE_3) mmc_retune_needed(host->mmc); + if (sdhci_arasan->has_cqe) { + ret = cqhci_suspend(host->mmc); + if (ret) + return ret; + } + ret = sdhci_suspend_host(host); if (ret) return ret; @@ -353,7 +430,16 @@ static int sdhci_arasan_resume(struct device *dev) sdhci_arasan->is_phy_on = true; } - return sdhci_resume_host(host); + ret = sdhci_resume_host(host); + if (ret) { + dev_err(dev, "Cannot resume host.\n"); + return ret; + } + + if (sdhci_arasan->has_cqe) + return cqhci_resume(host->mmc); + + return 0; } #endif /* ! CONFIG_PM_SLEEP */ @@ -556,6 +642,49 @@ static void sdhci_arasan_unregister_sdclk(struct device *dev) of_clk_del_provider(dev->of_node); } +static int sdhci_arasan_add_host(struct sdhci_arasan_data *sdhci_arasan) +{ + struct sdhci_host *host = sdhci_arasan->host; + struct cqhci_host *cq_host; + bool dma64; + int ret; + + if (!sdhci_arasan->has_cqe) + return sdhci_add_host(host); + + ret = sdhci_setup_host(host); + if (ret) + return ret; + + cq_host = devm_kzalloc(host->mmc->parent, + sizeof(*cq_host), GFP_KERNEL); + if (!cq_host) { + ret = -ENOMEM; + goto cleanup; + } + + cq_host->mmio = host->ioaddr + SDHCI_ARASAN_CQE_BASE_ADDR; + cq_host->ops = &sdhci_arasan_cqhci_ops; + + dma64 = host->flags & SDHCI_USE_64_BIT_DMA; + if (dma64) + cq_host->caps |= CQHCI_TASK_DESC_SZ_128; + + ret = cqhci_init(cq_host, host->mmc, dma64); + if (ret) + goto cleanup; + + ret = __sdhci_add_host(host); + if (ret) + goto cleanup; + + return 0; + +cleanup: + sdhci_cleanup_host(host); + return ret; +} + static int sdhci_arasan_probe(struct platform_device *pdev) { int ret; @@ -566,9 +695,15 @@ static int sdhci_arasan_probe(struct platform_device *pdev) struct sdhci_pltfm_host *pltfm_host; struct sdhci_arasan_data *sdhci_arasan; struct device_node *np = pdev->dev.of_node; + const struct sdhci_pltfm_data *pdata; + + if (of_device_is_compatible(pdev->dev.of_node, "arasan,sdhci-5.1")) + pdata = &sdhci_arasan_cqe_pdata; + else + pdata = &sdhci_arasan_pdata; + + host = sdhci_pltfm_init(pdev, pdata, sizeof(*sdhci_arasan)); - host = sdhci_pltfm_init(pdev, &sdhci_arasan_pdata, - sizeof(*sdhci_arasan)); if (IS_ERR(host)) return PTR_ERR(host); @@ -663,9 +798,11 @@ static int sdhci_arasan_probe(struct platform_device *pdev) sdhci_arasan_hs400_enhanced_strobe; host->mmc_host_ops.start_signal_voltage_switch = sdhci_arasan_voltage_switch; + sdhci_arasan->has_cqe = true; + host->mmc->caps2 |= MMC_CAP2_CQE | MMC_CAP2_CQE_DCMD; } - ret = sdhci_add_host(host); + ret = sdhci_arasan_add_host(sdhci_arasan); if (ret) goto err_add_host; diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c index 1f424374bbbb..4ffa6b173a21 100644 --- a/drivers/mmc/host/sdhci-of-esdhc.c +++ b/drivers/mmc/host/sdhci-of-esdhc.c @@ -589,10 +589,18 @@ static void esdhc_pltfm_set_bus_width(struct sdhci_host *host, int width) static void esdhc_reset(struct sdhci_host *host, u8 mask) { + u32 val; + sdhci_reset(host, mask); sdhci_writel(host, host->ier, SDHCI_INT_ENABLE); sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE); + + if (mask & SDHCI_RESET_ALL) { + val = sdhci_readl(host, ESDHC_TBCTL); + val &= ~ESDHC_TB_EN; + sdhci_writel(host, val, ESDHC_TBCTL); + } } /* The SCFG, Supplemental Configuration Unit, provides SoC specific diff --git a/drivers/mmc/host/sdhci-pci-arasan.c b/drivers/mmc/host/sdhci-pci-arasan.c new file mode 100644 index 000000000000..499f3205ec5c --- /dev/null +++ b/drivers/mmc/host/sdhci-pci-arasan.c @@ -0,0 +1,331 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * sdhci-pci-arasan.c - Driver for Arasan PCI Controller with + * integrated phy. + * + * Copyright (C) 2017 Arasan Chip Systems Inc. + * + * Author: Atul Garg <agarg@arasan.com> + */ + +#include <linux/pci.h> +#include <linux/delay.h> + +#include "sdhci.h" +#include "sdhci-pci.h" + +/* Extra registers for Arasan SD/SDIO/MMC Host Controller with PHY */ +#define PHY_ADDR_REG 0x300 +#define PHY_DAT_REG 0x304 + +#define PHY_WRITE BIT(8) +#define PHY_BUSY BIT(9) +#define DATA_MASK 0xFF + +/* PHY Specific Registers */ +#define DLL_STATUS 0x00 +#define IPAD_CTRL1 0x01 +#define IPAD_CTRL2 0x02 +#define IPAD_STS 0x03 +#define IOREN_CTRL1 0x06 +#define IOREN_CTRL2 0x07 +#define IOPU_CTRL1 0x08 +#define IOPU_CTRL2 0x09 +#define ITAP_DELAY 0x0C +#define OTAP_DELAY 0x0D +#define STRB_SEL 0x0E +#define CLKBUF_SEL 0x0F +#define MODE_CTRL 0x11 +#define DLL_TRIM 0x12 +#define CMD_CTRL 0x20 +#define DATA_CTRL 0x21 +#define STRB_CTRL 0x22 +#define CLK_CTRL 0x23 +#define PHY_CTRL 0x24 + +#define DLL_ENBL BIT(3) +#define RTRIM_EN BIT(1) +#define PDB_ENBL BIT(1) +#define RETB_ENBL BIT(6) +#define ODEN_CMD BIT(1) +#define ODEN_DAT 0xFF +#define REN_STRB BIT(0) +#define REN_CMND BIT(1) +#define REN_DATA 0xFF +#define PU_CMD BIT(1) +#define PU_DAT 0xFF +#define ITAPDLY_EN BIT(0) +#define OTAPDLY_EN BIT(0) +#define OD_REL_CMD BIT(1) +#define OD_REL_DAT 0xFF +#define DLLTRM_ICP 0x8 +#define PDB_CMND BIT(0) +#define PDB_DATA 0xFF +#define PDB_STRB BIT(0) +#define PDB_CLOCK BIT(0) +#define CALDONE_MASK 0x10 +#define DLL_RDY_MASK 0x10 +#define MAX_CLK_BUF 0x7 + +/* Mode Controls */ +#define ENHSTRB_MODE BIT(0) +#define HS400_MODE BIT(1) +#define LEGACY_MODE BIT(2) +#define DDR50_MODE BIT(3) + +/* + * Controller has no specific bits for HS200/HS. + * Used BIT(4), BIT(5) for software programming. + */ +#define HS200_MODE BIT(4) +#define HISPD_MODE BIT(5) + +#define OTAPDLY(x) (((x) << 1) | OTAPDLY_EN) +#define ITAPDLY(x) (((x) << 1) | ITAPDLY_EN) +#define FREQSEL(x) (((x) << 5) | DLL_ENBL) +#define IOPAD(x, y) ((x) | ((y) << 2)) + +/* Arasan private data */ +struct arasan_host { + u32 chg_clk; +}; + +static int arasan_phy_addr_poll(struct sdhci_host *host, u32 offset, u32 mask) +{ + ktime_t timeout = ktime_add_us(ktime_get(), 100); + bool failed; + u8 val = 0; + + while (1) { + failed = ktime_after(ktime_get(), timeout); + val = sdhci_readw(host, PHY_ADDR_REG); + if (!(val & mask)) + return 0; + if (failed) + return -EBUSY; + } +} + +static int arasan_phy_write(struct sdhci_host *host, u8 data, u8 offset) +{ + sdhci_writew(host, data, PHY_DAT_REG); + sdhci_writew(host, (PHY_WRITE | offset), PHY_ADDR_REG); + return arasan_phy_addr_poll(host, PHY_ADDR_REG, PHY_BUSY); +} + +static int arasan_phy_read(struct sdhci_host *host, u8 offset, u8 *data) +{ + int ret; + + sdhci_writew(host, 0, PHY_DAT_REG); + sdhci_writew(host, offset, PHY_ADDR_REG); + ret = arasan_phy_addr_poll(host, PHY_ADDR_REG, PHY_BUSY); + + /* Masking valid data bits */ + *data = sdhci_readw(host, PHY_DAT_REG) & DATA_MASK; + return ret; +} + +static int arasan_phy_sts_poll(struct sdhci_host *host, u32 offset, u32 mask) +{ + int ret; + ktime_t timeout = ktime_add_us(ktime_get(), 100); + bool failed; + u8 val = 0; + + while (1) { + failed = ktime_after(ktime_get(), timeout); + ret = arasan_phy_read(host, offset, &val); + if (ret) + return -EBUSY; + else if (val & mask) + return 0; + if (failed) + return -EBUSY; + } +} + +/* Initialize the Arasan PHY */ +static int arasan_phy_init(struct sdhci_host *host) +{ + int ret; + u8 val; + + /* Program IOPADs and wait for calibration to be done */ + if (arasan_phy_read(host, IPAD_CTRL1, &val) || + arasan_phy_write(host, val | RETB_ENBL | PDB_ENBL, IPAD_CTRL1) || + arasan_phy_read(host, IPAD_CTRL2, &val) || + arasan_phy_write(host, val | RTRIM_EN, IPAD_CTRL2)) + return -EBUSY; + ret = arasan_phy_sts_poll(host, IPAD_STS, CALDONE_MASK); + if (ret) + return -EBUSY; + + /* Program CMD/Data lines */ + if (arasan_phy_read(host, IOREN_CTRL1, &val) || + arasan_phy_write(host, val | REN_CMND | REN_STRB, IOREN_CTRL1) || + arasan_phy_read(host, IOPU_CTRL1, &val) || + arasan_phy_write(host, val | PU_CMD, IOPU_CTRL1) || + arasan_phy_read(host, CMD_CTRL, &val) || + arasan_phy_write(host, val | PDB_CMND, CMD_CTRL) || + arasan_phy_read(host, IOREN_CTRL2, &val) || + arasan_phy_write(host, val | REN_DATA, IOREN_CTRL2) || + arasan_phy_read(host, IOPU_CTRL2, &val) || + arasan_phy_write(host, val | PU_DAT, IOPU_CTRL2) || + arasan_phy_read(host, DATA_CTRL, &val) || + arasan_phy_write(host, val | PDB_DATA, DATA_CTRL) || + arasan_phy_read(host, STRB_CTRL, &val) || + arasan_phy_write(host, val | PDB_STRB, STRB_CTRL) || + arasan_phy_read(host, CLK_CTRL, &val) || + arasan_phy_write(host, val | PDB_CLOCK, CLK_CTRL) || + arasan_phy_read(host, CLKBUF_SEL, &val) || + arasan_phy_write(host, val | MAX_CLK_BUF, CLKBUF_SEL) || + arasan_phy_write(host, LEGACY_MODE, MODE_CTRL)) + return -EBUSY; + return 0; +} + +/* Set Arasan PHY for different modes */ +static int arasan_phy_set(struct sdhci_host *host, u8 mode, u8 otap, + u8 drv_type, u8 itap, u8 trim, u8 clk) +{ + u8 val; + int ret; + + if (mode == HISPD_MODE || mode == HS200_MODE) + ret = arasan_phy_write(host, 0x0, MODE_CTRL); + else + ret = arasan_phy_write(host, mode, MODE_CTRL); + if (ret) + return ret; + if (mode == HS400_MODE || mode == HS200_MODE) { + ret = arasan_phy_read(host, IPAD_CTRL1, &val); + if (ret) + return ret; + ret = arasan_phy_write(host, IOPAD(val, drv_type), IPAD_CTRL1); + if (ret) + return ret; + } + if (mode == LEGACY_MODE) { + ret = arasan_phy_write(host, 0x0, OTAP_DELAY); + if (ret) + return ret; + ret = arasan_phy_write(host, 0x0, ITAP_DELAY); + } else { + ret = arasan_phy_write(host, OTAPDLY(otap), OTAP_DELAY); + if (ret) + return ret; + if (mode != HS200_MODE) + ret = arasan_phy_write(host, ITAPDLY(itap), ITAP_DELAY); + else + ret = arasan_phy_write(host, 0x0, ITAP_DELAY); + } + if (ret) + return ret; + if (mode != LEGACY_MODE) { + ret = arasan_phy_write(host, trim, DLL_TRIM); + if (ret) + return ret; + } + ret = arasan_phy_write(host, 0, DLL_STATUS); + if (ret) + return ret; + if (mode != LEGACY_MODE) { + ret = arasan_phy_write(host, FREQSEL(clk), DLL_STATUS); + if (ret) + return ret; + ret = arasan_phy_sts_poll(host, DLL_STATUS, DLL_RDY_MASK); + if (ret) + return -EBUSY; + } + return 0; +} + +static int arasan_select_phy_clock(struct sdhci_host *host) +{ + struct sdhci_pci_slot *slot = sdhci_priv(host); + struct arasan_host *arasan_host = sdhci_pci_priv(slot); + u8 clk; + + if (arasan_host->chg_clk == host->mmc->ios.clock) + return 0; + + arasan_host->chg_clk = host->mmc->ios.clock; + if (host->mmc->ios.clock == 200000000) + clk = 0x0; + else if (host->mmc->ios.clock == 100000000) + clk = 0x2; + else if (host->mmc->ios.clock == 50000000) + clk = 0x1; + else + clk = 0x0; + + if (host->mmc_host_ops.hs400_enhanced_strobe) { + arasan_phy_set(host, ENHSTRB_MODE, 1, 0x0, 0x0, + DLLTRM_ICP, clk); + } else { + switch (host->mmc->ios.timing) { + case MMC_TIMING_LEGACY: + arasan_phy_set(host, LEGACY_MODE, 0x0, 0x0, 0x0, + 0x0, 0x0); + break; + case MMC_TIMING_MMC_HS: + case MMC_TIMING_SD_HS: + arasan_phy_set(host, HISPD_MODE, 0x3, 0x0, 0x2, + DLLTRM_ICP, clk); + break; + case MMC_TIMING_MMC_HS200: + case MMC_TIMING_UHS_SDR104: + arasan_phy_set(host, HS200_MODE, 0x2, + host->mmc->ios.drv_type, 0x0, + DLLTRM_ICP, clk); + break; + case MMC_TIMING_MMC_DDR52: + case MMC_TIMING_UHS_DDR50: + arasan_phy_set(host, DDR50_MODE, 0x1, 0x0, + 0x0, DLLTRM_ICP, clk); + break; + case MMC_TIMING_MMC_HS400: + arasan_phy_set(host, HS400_MODE, 0x1, + host->mmc->ios.drv_type, 0xa, + DLLTRM_ICP, clk); + break; + default: + break; + } + } + return 0; +} + +static int arasan_pci_probe_slot(struct sdhci_pci_slot *slot) +{ + int err; + + slot->host->mmc->caps |= MMC_CAP_NONREMOVABLE | MMC_CAP_8_BIT_DATA; + err = arasan_phy_init(slot->host); + if (err) + return -ENODEV; + return 0; +} + +static void arasan_sdhci_set_clock(struct sdhci_host *host, unsigned int clock) +{ + sdhci_set_clock(host, clock); + + /* Change phy settings for the new clock */ + arasan_select_phy_clock(host); +} + +static const struct sdhci_ops arasan_sdhci_pci_ops = { + .set_clock = arasan_sdhci_set_clock, + .enable_dma = sdhci_pci_enable_dma, + .set_bus_width = sdhci_set_bus_width, + .reset = sdhci_reset, + .set_uhs_signaling = sdhci_set_uhs_signaling, +}; + +const struct sdhci_pci_fixes sdhci_arasan = { + .probe_slot = arasan_pci_probe_slot, + .ops = &arasan_sdhci_pci_ops, + .priv_size = sizeof(struct arasan_host), +}; diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c index 3e4f04fd5175..6d1a983e6227 100644 --- a/drivers/mmc/host/sdhci-pci-core.c +++ b/drivers/mmc/host/sdhci-pci-core.c @@ -30,17 +30,37 @@ #include <linux/mmc/sdhci-pci-data.h> #include <linux/acpi.h> +#include "cqhci.h" + #include "sdhci.h" #include "sdhci-pci.h" -static int sdhci_pci_enable_dma(struct sdhci_host *host); static void sdhci_pci_hw_reset(struct sdhci_host *host); #ifdef CONFIG_PM_SLEEP -static int __sdhci_pci_suspend_host(struct sdhci_pci_chip *chip) +static int sdhci_pci_init_wakeup(struct sdhci_pci_chip *chip) +{ + mmc_pm_flag_t pm_flags = 0; + int i; + + for (i = 0; i < chip->num_slots; i++) { + struct sdhci_pci_slot *slot = chip->slots[i]; + + if (slot) + pm_flags |= slot->host->mmc->pm_flags; + } + + return device_set_wakeup_enable(&chip->pdev->dev, + (pm_flags & MMC_PM_KEEP_POWER) && + (pm_flags & MMC_PM_WAKE_SDIO_IRQ)); +} + +static int sdhci_pci_suspend_host(struct sdhci_pci_chip *chip) { int i, ret; + sdhci_pci_init_wakeup(chip); + for (i = 0; i < chip->num_slots; i++) { struct sdhci_pci_slot *slot = chip->slots[i]; struct sdhci_host *host; @@ -56,9 +76,6 @@ static int __sdhci_pci_suspend_host(struct sdhci_pci_chip *chip) ret = sdhci_suspend_host(host); if (ret) goto err_pci_suspend; - - if (host->mmc->pm_flags & MMC_PM_WAKE_SDIO_IRQ) - sdhci_enable_irq_wakeups(host); } return 0; @@ -69,52 +86,44 @@ err_pci_suspend: return ret; } -static int sdhci_pci_init_wakeup(struct sdhci_pci_chip *chip) +int sdhci_pci_resume_host(struct sdhci_pci_chip *chip) { - mmc_pm_flag_t pm_flags = 0; - int i; + struct sdhci_pci_slot *slot; + int i, ret; for (i = 0; i < chip->num_slots; i++) { - struct sdhci_pci_slot *slot = chip->slots[i]; + slot = chip->slots[i]; + if (!slot) + continue; - if (slot) - pm_flags |= slot->host->mmc->pm_flags; + ret = sdhci_resume_host(slot->host); + if (ret) + return ret; } - return device_init_wakeup(&chip->pdev->dev, - (pm_flags & MMC_PM_KEEP_POWER) && - (pm_flags & MMC_PM_WAKE_SDIO_IRQ)); + return 0; } -static int sdhci_pci_suspend_host(struct sdhci_pci_chip *chip) +static int sdhci_cqhci_suspend(struct sdhci_pci_chip *chip) { int ret; - ret = __sdhci_pci_suspend_host(chip); + ret = cqhci_suspend(chip->slots[0]->host->mmc); if (ret) return ret; - sdhci_pci_init_wakeup(chip); - - return 0; + return sdhci_pci_suspend_host(chip); } -int sdhci_pci_resume_host(struct sdhci_pci_chip *chip) +static int sdhci_cqhci_resume(struct sdhci_pci_chip *chip) { - struct sdhci_pci_slot *slot; - int i, ret; - - for (i = 0; i < chip->num_slots; i++) { - slot = chip->slots[i]; - if (!slot) - continue; + int ret; - ret = sdhci_resume_host(slot->host); - if (ret) - return ret; - } + ret = sdhci_pci_resume_host(chip); + if (ret) + return ret; - return 0; + return cqhci_resume(chip->slots[0]->host->mmc); } #endif @@ -166,8 +175,48 @@ static int sdhci_pci_runtime_resume_host(struct sdhci_pci_chip *chip) return 0; } + +static int sdhci_cqhci_runtime_suspend(struct sdhci_pci_chip *chip) +{ + int ret; + + ret = cqhci_suspend(chip->slots[0]->host->mmc); + if (ret) + return ret; + + return sdhci_pci_runtime_suspend_host(chip); +} + +static int sdhci_cqhci_runtime_resume(struct sdhci_pci_chip *chip) +{ + int ret; + + ret = sdhci_pci_runtime_resume_host(chip); + if (ret) + return ret; + + return cqhci_resume(chip->slots[0]->host->mmc); +} #endif +static u32 sdhci_cqhci_irq(struct sdhci_host *host, u32 intmask) +{ + int cmd_error = 0; + int data_error = 0; + + if (!sdhci_cqe_irq(host, intmask, &cmd_error, &data_error)) + return intmask; + + cqhci_irq(host->mmc, intmask, cmd_error, data_error); + + return 0; +} + +static void sdhci_pci_dumpregs(struct mmc_host *mmc) +{ + sdhci_dumpregs(mmc_priv(mmc)); +} + /*****************************************************************************\ * * * Hardware specific quirk handling * @@ -583,6 +632,18 @@ static const struct sdhci_ops sdhci_intel_byt_ops = { .voltage_switch = sdhci_intel_voltage_switch, }; +static const struct sdhci_ops sdhci_intel_glk_ops = { + .set_clock = sdhci_set_clock, + .set_power = sdhci_intel_set_power, + .enable_dma = sdhci_pci_enable_dma, + .set_bus_width = sdhci_set_bus_width, + .reset = sdhci_reset, + .set_uhs_signaling = sdhci_set_uhs_signaling, + .hw_reset = sdhci_pci_hw_reset, + .voltage_switch = sdhci_intel_voltage_switch, + .irq = sdhci_cqhci_irq, +}; + static void byt_read_dsm(struct sdhci_pci_slot *slot) { struct intel_host *intel_host = sdhci_pci_priv(slot); @@ -612,12 +673,80 @@ static int glk_emmc_probe_slot(struct sdhci_pci_slot *slot) { int ret = byt_emmc_probe_slot(slot); + slot->host->mmc->caps2 |= MMC_CAP2_CQE; + if (slot->chip->pdev->device != PCI_DEVICE_ID_INTEL_GLK_EMMC) { slot->host->mmc->caps2 |= MMC_CAP2_HS400_ES, slot->host->mmc_host_ops.hs400_enhanced_strobe = intel_hs400_enhanced_strobe; + slot->host->mmc->caps2 |= MMC_CAP2_CQE_DCMD; + } + + return ret; +} + +static void glk_cqe_enable(struct mmc_host *mmc) +{ + struct sdhci_host *host = mmc_priv(mmc); + u32 reg; + + /* + * CQE gets stuck if it sees Buffer Read Enable bit set, which can be + * the case after tuning, so ensure the buffer is drained. + */ + reg = sdhci_readl(host, SDHCI_PRESENT_STATE); + while (reg & SDHCI_DATA_AVAILABLE) { + sdhci_readl(host, SDHCI_BUFFER); + reg = sdhci_readl(host, SDHCI_PRESENT_STATE); } + sdhci_cqe_enable(mmc); +} + +static const struct cqhci_host_ops glk_cqhci_ops = { + .enable = glk_cqe_enable, + .disable = sdhci_cqe_disable, + .dumpregs = sdhci_pci_dumpregs, +}; + +static int glk_emmc_add_host(struct sdhci_pci_slot *slot) +{ + struct device *dev = &slot->chip->pdev->dev; + struct sdhci_host *host = slot->host; + struct cqhci_host *cq_host; + bool dma64; + int ret; + + ret = sdhci_setup_host(host); + if (ret) + return ret; + + cq_host = devm_kzalloc(dev, sizeof(*cq_host), GFP_KERNEL); + if (!cq_host) { + ret = -ENOMEM; + goto cleanup; + } + + cq_host->mmio = host->ioaddr + 0x200; + cq_host->quirks |= CQHCI_QUIRK_SHORT_TXFR_DESC_SZ; + cq_host->ops = &glk_cqhci_ops; + + dma64 = host->flags & SDHCI_USE_64_BIT_DMA; + if (dma64) + cq_host->caps |= CQHCI_TASK_DESC_SZ_128; + + ret = cqhci_init(cq_host, host->mmc, dma64); + if (ret) + goto cleanup; + + ret = __sdhci_add_host(host); + if (ret) + goto cleanup; + + return 0; + +cleanup: + sdhci_cleanup_host(host); return ret; } @@ -699,11 +828,20 @@ static const struct sdhci_pci_fixes sdhci_intel_byt_emmc = { static const struct sdhci_pci_fixes sdhci_intel_glk_emmc = { .allow_runtime_pm = true, .probe_slot = glk_emmc_probe_slot, + .add_host = glk_emmc_add_host, +#ifdef CONFIG_PM_SLEEP + .suspend = sdhci_cqhci_suspend, + .resume = sdhci_cqhci_resume, +#endif +#ifdef CONFIG_PM + .runtime_suspend = sdhci_cqhci_runtime_suspend, + .runtime_resume = sdhci_cqhci_runtime_resume, +#endif .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC, .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN | SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400 | SDHCI_QUIRK2_STOP_WITH_TC, - .ops = &sdhci_intel_byt_ops, + .ops = &sdhci_intel_glk_ops, .priv_size = sizeof(struct intel_host), }; @@ -778,6 +916,8 @@ static int intel_mrfld_mmc_probe_slot(struct sdhci_pci_slot *slot) slot->host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V; break; case INTEL_MRFLD_SDIO: + /* Advertise 2.0v for compatibility with the SDIO card's OCR */ + slot->host->ocr_mask = MMC_VDD_20_21 | MMC_VDD_165_195; slot->host->mmc->caps |= MMC_CAP_NONREMOVABLE | MMC_CAP_POWER_OFF_CARD; break; @@ -955,7 +1095,7 @@ static int jmicron_suspend(struct sdhci_pci_chip *chip) { int i, ret; - ret = __sdhci_pci_suspend_host(chip); + ret = sdhci_pci_suspend_host(chip); if (ret) return ret; @@ -965,8 +1105,6 @@ static int jmicron_suspend(struct sdhci_pci_chip *chip) jmicron_enable_mmc(chip->slots[i]->host, 0); } - sdhci_pci_init_wakeup(chip); - return 0; } @@ -1306,6 +1444,7 @@ static const struct pci_device_id pci_ids[] = { SDHCI_PCI_DEVICE(O2, SDS1, o2), SDHCI_PCI_DEVICE(O2, SEABIRD0, o2), SDHCI_PCI_DEVICE(O2, SEABIRD1, o2), + SDHCI_PCI_DEVICE(ARASAN, PHY_EMMC, arasan), SDHCI_PCI_DEVICE_CLASS(AMD, SYSTEM_SDHCI, PCI_CLASS_MASK, amd), /* Generic SD host controller */ {PCI_DEVICE_CLASS(SYSTEM_SDHCI, PCI_CLASS_MASK)}, @@ -1320,7 +1459,7 @@ MODULE_DEVICE_TABLE(pci, pci_ids); * * \*****************************************************************************/ -static int sdhci_pci_enable_dma(struct sdhci_host *host) +int sdhci_pci_enable_dma(struct sdhci_host *host) { struct sdhci_pci_slot *slot; struct pci_dev *pdev; @@ -1543,10 +1682,13 @@ static struct sdhci_pci_slot *sdhci_pci_probe_slot( } } - host->mmc->pm_caps = MMC_PM_KEEP_POWER | MMC_PM_WAKE_SDIO_IRQ; + host->mmc->pm_caps = MMC_PM_KEEP_POWER; host->mmc->slotno = slotno; host->mmc->caps2 |= MMC_CAP2_NO_PRESCAN_POWERUP; + if (device_can_wakeup(&pdev->dev)) + host->mmc->pm_caps |= MMC_PM_WAKE_SDIO_IRQ; + if (slot->cd_idx >= 0) { ret = mmc_gpiod_request_cd(host->mmc, NULL, slot->cd_idx, slot->cd_override_level, 0, NULL); diff --git a/drivers/mmc/host/sdhci-pci.h b/drivers/mmc/host/sdhci-pci.h index 0056f08a29cc..5cbcdc448f98 100644 --- a/drivers/mmc/host/sdhci-pci.h +++ b/drivers/mmc/host/sdhci-pci.h @@ -55,6 +55,9 @@ #define PCI_SUBDEVICE_ID_NI_7884 0x7884 +#define PCI_VENDOR_ID_ARASAN 0x16e6 +#define PCI_DEVICE_ID_ARASAN_PHY_EMMC 0x0670 + /* * PCI device class and mask */ @@ -170,11 +173,13 @@ static inline void *sdhci_pci_priv(struct sdhci_pci_slot *slot) #ifdef CONFIG_PM_SLEEP int sdhci_pci_resume_host(struct sdhci_pci_chip *chip); #endif - +int sdhci_pci_enable_dma(struct sdhci_host *host); int sdhci_pci_o2_probe_slot(struct sdhci_pci_slot *slot); int sdhci_pci_o2_probe(struct sdhci_pci_chip *chip); #ifdef CONFIG_PM_SLEEP int sdhci_pci_o2_resume(struct sdhci_pci_chip *chip); #endif +extern const struct sdhci_pci_fixes sdhci_arasan; + #endif /* __SDHCI_PCI_H */ diff --git a/drivers/mmc/host/sdhci-spear.c b/drivers/mmc/host/sdhci-spear.c index 8c0f88428556..14511526a3a8 100644 --- a/drivers/mmc/host/sdhci-spear.c +++ b/drivers/mmc/host/sdhci-spear.c @@ -82,6 +82,10 @@ static int sdhci_probe(struct platform_device *pdev) host->hw_name = "sdhci"; host->ops = &sdhci_pltfm_ops; host->irq = platform_get_irq(pdev, 0); + if (host->irq <= 0) { + ret = -EINVAL; + goto err_host; + } host->quirks = SDHCI_QUIRK_BROKEN_ADMA; sdhci = sdhci_priv(host); diff --git a/drivers/mmc/host/sdhci-xenon.c b/drivers/mmc/host/sdhci-xenon.c index 0842bbc2d7ad..4d0791f6ec23 100644 --- a/drivers/mmc/host/sdhci-xenon.c +++ b/drivers/mmc/host/sdhci-xenon.c @@ -230,7 +230,14 @@ static void xenon_set_power(struct sdhci_host *host, unsigned char mode, mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd); } +static void xenon_voltage_switch(struct sdhci_host *host) +{ + /* Wait for 5ms after set 1.8V signal enable bit */ + usleep_range(5000, 5500); +} + static const struct sdhci_ops sdhci_xenon_ops = { + .voltage_switch = xenon_voltage_switch, .set_clock = sdhci_set_clock, .set_power = xenon_set_power, .set_bus_width = sdhci_set_bus_width, diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index e9290a3439d5..070aff9c108f 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -1434,6 +1434,13 @@ void sdhci_set_power_noreg(struct sdhci_host *host, unsigned char mode, if (mode != MMC_POWER_OFF) { switch (1 << vdd) { case MMC_VDD_165_195: + /* + * Without a regulator, SDHCI does not support 2.0v + * so we only get here if the driver deliberately + * added the 2.0v range to ocr_avail. Map it to 1.8v + * for the purpose of turning on the power. + */ + case MMC_VDD_20_21: pwr = SDHCI_POWER_180; break; case MMC_VDD_29_30: @@ -2821,25 +2828,33 @@ static irqreturn_t sdhci_thread_irq(int irq, void *dev_id) * sdhci_disable_irq_wakeups() since it will be set by * sdhci_enable_card_detection() or sdhci_init(). */ -void sdhci_enable_irq_wakeups(struct sdhci_host *host) +static bool sdhci_enable_irq_wakeups(struct sdhci_host *host) { + u8 mask = SDHCI_WAKE_ON_INSERT | SDHCI_WAKE_ON_REMOVE | + SDHCI_WAKE_ON_INT; + u32 irq_val = 0; + u8 wake_val = 0; u8 val; - u8 mask = SDHCI_WAKE_ON_INSERT | SDHCI_WAKE_ON_REMOVE - | SDHCI_WAKE_ON_INT; - u32 irq_val = SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE | - SDHCI_INT_CARD_INT; - val = sdhci_readb(host, SDHCI_WAKE_UP_CONTROL); - val |= mask ; - /* Avoid fake wake up */ - if (host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) { - val &= ~(SDHCI_WAKE_ON_INSERT | SDHCI_WAKE_ON_REMOVE); - irq_val &= ~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE); + if (!(host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION)) { + wake_val |= SDHCI_WAKE_ON_INSERT | SDHCI_WAKE_ON_REMOVE; + irq_val |= SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE; } + + wake_val |= SDHCI_WAKE_ON_INT; + irq_val |= SDHCI_INT_CARD_INT; + + val = sdhci_readb(host, SDHCI_WAKE_UP_CONTROL); + val &= ~mask; + val |= wake_val; sdhci_writeb(host, val, SDHCI_WAKE_UP_CONTROL); + sdhci_writel(host, irq_val, SDHCI_INT_ENABLE); + + host->irq_wake_enabled = !enable_irq_wake(host->irq); + + return host->irq_wake_enabled; } -EXPORT_SYMBOL_GPL(sdhci_enable_irq_wakeups); static void sdhci_disable_irq_wakeups(struct sdhci_host *host) { @@ -2850,6 +2865,10 @@ static void sdhci_disable_irq_wakeups(struct sdhci_host *host) val = sdhci_readb(host, SDHCI_WAKE_UP_CONTROL); val &= ~mask; sdhci_writeb(host, val, SDHCI_WAKE_UP_CONTROL); + + disable_irq_wake(host->irq); + + host->irq_wake_enabled = false; } int sdhci_suspend_host(struct sdhci_host *host) @@ -2858,15 +2877,14 @@ int sdhci_suspend_host(struct sdhci_host *host) mmc_retune_timer_stop(host->mmc); - if (!device_may_wakeup(mmc_dev(host->mmc))) { + if (!device_may_wakeup(mmc_dev(host->mmc)) || + !sdhci_enable_irq_wakeups(host)) { host->ier = 0; sdhci_writel(host, 0, SDHCI_INT_ENABLE); sdhci_writel(host, 0, SDHCI_SIGNAL_ENABLE); free_irq(host->irq, host); - } else { - sdhci_enable_irq_wakeups(host); - enable_irq_wake(host->irq); } + return 0; } @@ -2894,15 +2912,14 @@ int sdhci_resume_host(struct sdhci_host *host) mmiowb(); } - if (!device_may_wakeup(mmc_dev(host->mmc))) { + if (host->irq_wake_enabled) { + sdhci_disable_irq_wakeups(host); + } else { ret = request_threaded_irq(host->irq, sdhci_irq, sdhci_thread_irq, IRQF_SHARED, mmc_hostname(host->mmc), host); if (ret) return ret; - } else { - sdhci_disable_irq_wakeups(host); - disable_irq_wake(host->irq); } sdhci_enable_card_detection(host); diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h index 54bc444c317f..afab26fd70e6 100644 --- a/drivers/mmc/host/sdhci.h +++ b/drivers/mmc/host/sdhci.h @@ -484,6 +484,7 @@ struct sdhci_host { bool bus_on; /* Bus power prevents runtime suspend */ bool preset_enabled; /* Preset is enabled */ bool pending_reset; /* Cmd/data reset is pending */ + bool irq_wake_enabled; /* IRQ wakeup is enabled */ struct mmc_request *mrqs_done[SDHCI_MAX_MRQS]; /* Requests done */ struct mmc_command *cmd; /* Current command */ @@ -718,7 +719,6 @@ void sdhci_enable_sdio_irq(struct mmc_host *mmc, int enable); #ifdef CONFIG_PM int sdhci_suspend_host(struct sdhci_host *host); int sdhci_resume_host(struct sdhci_host *host); -void sdhci_enable_irq_wakeups(struct sdhci_host *host); int sdhci_runtime_suspend_host(struct sdhci_host *host); int sdhci_runtime_resume_host(struct sdhci_host *host); #endif diff --git a/drivers/mmc/host/sdhci_f_sdh30.c b/drivers/mmc/host/sdhci_f_sdh30.c index 04ca0d33a521..485f7591fae4 100644 --- a/drivers/mmc/host/sdhci_f_sdh30.c +++ b/drivers/mmc/host/sdhci_f_sdh30.c @@ -10,9 +10,11 @@ * the Free Software Foundation, version 2 of the License. */ +#include <linux/acpi.h> #include <linux/err.h> #include <linux/delay.h> #include <linux/module.h> +#include <linux/of.h> #include <linux/property.h> #include <linux/clk.h> @@ -146,7 +148,6 @@ static int sdhci_f_sdh30_probe(struct platform_device *pdev) platform_set_drvdata(pdev, host); - sdhci_get_of_property(pdev); host->hw_name = "f_sdh30"; host->ops = &sdhci_f_sdh30_ops; host->irq = irq; @@ -158,25 +159,29 @@ static int sdhci_f_sdh30_probe(struct platform_device *pdev) goto err; } - priv->clk_iface = devm_clk_get(&pdev->dev, "iface"); - if (IS_ERR(priv->clk_iface)) { - ret = PTR_ERR(priv->clk_iface); - goto err; - } + if (dev_of_node(dev)) { + sdhci_get_of_property(pdev); - ret = clk_prepare_enable(priv->clk_iface); - if (ret) - goto err; + priv->clk_iface = devm_clk_get(&pdev->dev, "iface"); + if (IS_ERR(priv->clk_iface)) { + ret = PTR_ERR(priv->clk_iface); + goto err; + } - priv->clk = devm_clk_get(&pdev->dev, "core"); - if (IS_ERR(priv->clk)) { - ret = PTR_ERR(priv->clk); - goto err_clk; - } + ret = clk_prepare_enable(priv->clk_iface); + if (ret) + goto err; - ret = clk_prepare_enable(priv->clk); - if (ret) - goto err_clk; + priv->clk = devm_clk_get(&pdev->dev, "core"); + if (IS_ERR(priv->clk)) { + ret = PTR_ERR(priv->clk); + goto err_clk; + } + + ret = clk_prepare_enable(priv->clk); + if (ret) + goto err_clk; + } /* init vendor specific regs */ ctrl = sdhci_readw(host, F_SDH30_AHB_CONFIG); @@ -226,16 +231,27 @@ static int sdhci_f_sdh30_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_OF static const struct of_device_id f_sdh30_dt_ids[] = { { .compatible = "fujitsu,mb86s70-sdhci-3.0" }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, f_sdh30_dt_ids); +#endif + +#ifdef CONFIG_ACPI +static const struct acpi_device_id f_sdh30_acpi_ids[] = { + { "SCX0002" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(acpi, f_sdh30_acpi_ids); +#endif static struct platform_driver sdhci_f_sdh30_driver = { .driver = { .name = "f_sdh30", - .of_match_table = f_sdh30_dt_ids, + .of_match_table = of_match_ptr(f_sdh30_dt_ids), + .acpi_match_table = ACPI_PTR(f_sdh30_acpi_ids), .pm = &sdhci_pltfm_pmops, }, .probe = sdhci_f_sdh30_probe, diff --git a/drivers/mmc/host/sh_mmcif.c b/drivers/mmc/host/sh_mmcif.c index 53fb18bb7bee..7bb00c68a756 100644 --- a/drivers/mmc/host/sh_mmcif.c +++ b/drivers/mmc/host/sh_mmcif.c @@ -916,7 +916,7 @@ static void sh_mmcif_start_cmd(struct sh_mmcif_host *host, struct mmc_request *mrq) { struct mmc_command *cmd = mrq->cmd; - u32 opc = cmd->opcode; + u32 opc; u32 mask = 0; unsigned long flags; diff --git a/drivers/mmc/host/sunxi-mmc.c b/drivers/mmc/host/sunxi-mmc.c index cc98355dbdb9..bad612d6f879 100644 --- a/drivers/mmc/host/sunxi-mmc.c +++ b/drivers/mmc/host/sunxi-mmc.c @@ -3,7 +3,7 @@ * (C) Copyright 2007-2011 Reuuimlla Technology Co., Ltd. * (C) Copyright 2007-2011 Aaron Maoye <leafy.myeh@reuuimllatech.com> * (C) Copyright 2013-2014 O2S GmbH <www.o2s.ch> - * (C) Copyright 2013-2014 David Lanzend�rfer <david.lanzendoerfer@o2s.ch> + * (C) Copyright 2013-2014 David Lanzendörfer <david.lanzendoerfer@o2s.ch> * (C) Copyright 2013-2014 Hans de Goede <hdegoede@redhat.com> * (C) Copyright 2017 Sootech SA * @@ -1255,6 +1255,11 @@ static int sunxi_mmc_resource_request(struct sunxi_mmc_host *host, goto error_assert_reset; host->irq = platform_get_irq(pdev, 0); + if (host->irq <= 0) { + ret = -EINVAL; + goto error_assert_reset; + } + return devm_request_threaded_irq(&pdev->dev, host->irq, sunxi_mmc_irq, sunxi_mmc_handle_manual_stop, 0, "sunxi-mmc", host); @@ -1393,5 +1398,5 @@ module_platform_driver(sunxi_mmc_driver); MODULE_DESCRIPTION("Allwinner's SD/MMC Card Controller Driver"); MODULE_LICENSE("GPL v2"); -MODULE_AUTHOR("David Lanzend�rfer <david.lanzendoerfer@o2s.ch>"); +MODULE_AUTHOR("David Lanzendörfer <david.lanzendoerfer@o2s.ch>"); MODULE_ALIAS("platform:sunxi-mmc"); diff --git a/drivers/mmc/host/tmio_mmc.c b/drivers/mmc/host/tmio_mmc.c index 64b7e9f18361..43a2ea5cff24 100644 --- a/drivers/mmc/host/tmio_mmc.c +++ b/drivers/mmc/host/tmio_mmc.c @@ -92,14 +92,19 @@ static int tmio_mmc_probe(struct platform_device *pdev) pdata->flags |= TMIO_MMC_HAVE_HIGH_REG; - host = tmio_mmc_host_alloc(pdev); - if (!host) + host = tmio_mmc_host_alloc(pdev, pdata); + if (IS_ERR(host)) { + ret = PTR_ERR(host); goto cell_disable; + } /* SD control register space size is 0x200, 0x400 for bus_shift=1 */ host->bus_shift = resource_size(res) >> 10; - ret = tmio_mmc_host_probe(host, pdata, NULL); + host->mmc->f_max = pdata->hclk; + host->mmc->f_min = pdata->hclk / 512; + + ret = tmio_mmc_host_probe(host); if (ret) goto host_free; @@ -128,15 +133,11 @@ out: static int tmio_mmc_remove(struct platform_device *pdev) { const struct mfd_cell *cell = mfd_get_cell(pdev); - struct mmc_host *mmc = platform_get_drvdata(pdev); + struct tmio_mmc_host *host = platform_get_drvdata(pdev); - if (mmc) { - struct tmio_mmc_host *host = mmc_priv(mmc); - - tmio_mmc_host_remove(host); - if (cell->disable) - cell->disable(pdev); - } + tmio_mmc_host_remove(host); + if (cell->disable) + cell->disable(pdev); return 0; } diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h index 3e6ff8921440..e7d651352dc9 100644 --- a/drivers/mmc/host/tmio_mmc.h +++ b/drivers/mmc/host/tmio_mmc.h @@ -112,12 +112,6 @@ struct tmio_mmc_data; struct tmio_mmc_host; -struct tmio_mmc_dma { - enum dma_slave_buswidth dma_buswidth; - bool (*filter)(struct dma_chan *chan, void *arg); - void (*enable)(struct tmio_mmc_host *host, bool enable); -}; - struct tmio_mmc_dma_ops { void (*start)(struct tmio_mmc_host *host, struct mmc_data *data); void (*enable)(struct tmio_mmc_host *host, bool enable); @@ -134,6 +128,7 @@ struct tmio_mmc_host { struct mmc_request *mrq; struct mmc_data *data; struct mmc_host *mmc; + struct mmc_host_ops ops; /* Callbacks for clock / power control */ void (*set_pwr)(struct platform_device *host, int state); @@ -144,18 +139,15 @@ struct tmio_mmc_host { struct scatterlist *sg_orig; unsigned int sg_len; unsigned int sg_off; - unsigned long bus_shift; + unsigned int bus_shift; struct platform_device *pdev; struct tmio_mmc_data *pdata; - struct tmio_mmc_dma *dma; /* DMA support */ bool force_pio; struct dma_chan *chan_rx; struct dma_chan *chan_tx; - struct completion dma_dataend; - struct tasklet_struct dma_complete; struct tasklet_struct dma_issue; struct scatterlist bounce_sg; u8 *bounce_buf; @@ -174,7 +166,6 @@ struct tmio_mmc_host { struct mutex ios_lock; /* protect set_ios() context */ bool native_hotplug; bool sdio_irq_enabled; - u32 scc_tappos; /* Mandatory callback */ int (*clk_enable)(struct tmio_mmc_host *host); @@ -185,9 +176,6 @@ struct tmio_mmc_host { void (*clk_disable)(struct tmio_mmc_host *host); int (*multi_io_quirk)(struct mmc_card *card, unsigned int direction, int blk_size); - int (*card_busy)(struct mmc_host *mmc); - int (*start_signal_voltage_switch)(struct mmc_host *mmc, - struct mmc_ios *ios); int (*write16_hook)(struct tmio_mmc_host *host, int addr); void (*hw_reset)(struct tmio_mmc_host *host); void (*prepare_tuning)(struct tmio_mmc_host *host, unsigned long tap); @@ -207,11 +195,10 @@ struct tmio_mmc_host { const struct tmio_mmc_dma_ops *dma_ops; }; -struct tmio_mmc_host *tmio_mmc_host_alloc(struct platform_device *pdev); +struct tmio_mmc_host *tmio_mmc_host_alloc(struct platform_device *pdev, + struct tmio_mmc_data *pdata); void tmio_mmc_host_free(struct tmio_mmc_host *host); -int tmio_mmc_host_probe(struct tmio_mmc_host *host, - struct tmio_mmc_data *pdata, - const struct tmio_mmc_dma_ops *dma_ops); +int tmio_mmc_host_probe(struct tmio_mmc_host *host); void tmio_mmc_host_remove(struct tmio_mmc_host *host); void tmio_mmc_do_data_irq(struct tmio_mmc_host *host); @@ -240,26 +227,26 @@ int tmio_mmc_host_runtime_resume(struct device *dev); static inline u16 sd_ctrl_read16(struct tmio_mmc_host *host, int addr) { - return readw(host->ctl + (addr << host->bus_shift)); + return ioread16(host->ctl + (addr << host->bus_shift)); } static inline void sd_ctrl_read16_rep(struct tmio_mmc_host *host, int addr, u16 *buf, int count) { - readsw(host->ctl + (addr << host->bus_shift), buf, count); + ioread16_rep(host->ctl + (addr << host->bus_shift), buf, count); } static inline u32 sd_ctrl_read16_and_16_as_32(struct tmio_mmc_host *host, int addr) { - return readw(host->ctl + (addr << host->bus_shift)) | - readw(host->ctl + ((addr + 2) << host->bus_shift)) << 16; + return ioread16(host->ctl + (addr << host->bus_shift)) | + ioread16(host->ctl + ((addr + 2) << host->bus_shift)) << 16; } static inline void sd_ctrl_read32_rep(struct tmio_mmc_host *host, int addr, u32 *buf, int count) { - readsl(host->ctl + (addr << host->bus_shift), buf, count); + ioread32_rep(host->ctl + (addr << host->bus_shift), buf, count); } static inline void sd_ctrl_write16(struct tmio_mmc_host *host, int addr, @@ -270,26 +257,26 @@ static inline void sd_ctrl_write16(struct tmio_mmc_host *host, int addr, */ if (host->write16_hook && host->write16_hook(host, addr)) return; - writew(val, host->ctl + (addr << host->bus_shift)); + iowrite16(val, host->ctl + (addr << host->bus_shift)); } static inline void sd_ctrl_write16_rep(struct tmio_mmc_host *host, int addr, u16 *buf, int count) { - writesw(host->ctl + (addr << host->bus_shift), buf, count); + iowrite16_rep(host->ctl + (addr << host->bus_shift), buf, count); } static inline void sd_ctrl_write32_as_16_and_16(struct tmio_mmc_host *host, int addr, u32 val) { - writew(val & 0xffff, host->ctl + (addr << host->bus_shift)); - writew(val >> 16, host->ctl + ((addr + 2) << host->bus_shift)); + iowrite16(val & 0xffff, host->ctl + (addr << host->bus_shift)); + iowrite16(val >> 16, host->ctl + ((addr + 2) << host->bus_shift)); } static inline void sd_ctrl_write32_rep(struct tmio_mmc_host *host, int addr, const u32 *buf, int count) { - writesl(host->ctl + (addr << host->bus_shift), buf, count); + iowrite32_rep(host->ctl + (addr << host->bus_shift), buf, count); } #endif diff --git a/drivers/mmc/host/tmio_mmc_core.c b/drivers/mmc/host/tmio_mmc_core.c index 583bf3262df5..33494241245a 100644 --- a/drivers/mmc/host/tmio_mmc_core.c +++ b/drivers/mmc/host/tmio_mmc_core.c @@ -806,7 +806,7 @@ static int tmio_mmc_execute_tuning(struct mmc_host *mmc, u32 opcode) if (ret == 0) set_bit(i, host->taps); - mdelay(1); + usleep_range(1000, 1200); } ret = host->select_tuning(host); @@ -926,20 +926,6 @@ static void tmio_mmc_done_work(struct work_struct *work) tmio_mmc_finish_request(host); } -static int tmio_mmc_clk_enable(struct tmio_mmc_host *host) -{ - if (!host->clk_enable) - return -ENOTSUPP; - - return host->clk_enable(host); -} - -static void tmio_mmc_clk_disable(struct tmio_mmc_host *host) -{ - if (host->clk_disable) - host->clk_disable(host); -} - static void tmio_mmc_power_on(struct tmio_mmc_host *host, unsigned short vdd) { struct mmc_host *mmc = host->mmc; @@ -958,7 +944,7 @@ static void tmio_mmc_power_on(struct tmio_mmc_host *host, unsigned short vdd) * 100us were not enough. Is this the same 140us delay, as in * tmio_mmc_set_ios()? */ - udelay(200); + usleep_range(200, 300); } /* * It seems, VccQ should be switched on after Vcc, this is also what the @@ -966,7 +952,7 @@ static void tmio_mmc_power_on(struct tmio_mmc_host *host, unsigned short vdd) */ if (!IS_ERR(mmc->supply.vqmmc) && !ret) { ret = regulator_enable(mmc->supply.vqmmc); - udelay(200); + usleep_range(200, 300); } if (ret < 0) @@ -1059,7 +1045,7 @@ static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) } /* Let things settle. delay taken from winCE driver */ - udelay(140); + usleep_range(140, 200); if (PTR_ERR(host->mrq) == -EINTR) dev_dbg(&host->pdev->dev, "%s.%d: IOS interrupted: clk %u, mode %u", @@ -1076,15 +1062,9 @@ static int tmio_mmc_get_ro(struct mmc_host *mmc) { struct tmio_mmc_host *host = mmc_priv(mmc); struct tmio_mmc_data *pdata = host->pdata; - int ret = mmc_gpio_get_ro(mmc); - - if (ret >= 0) - return ret; - - ret = !((pdata->flags & TMIO_MMC_WRPROTECT_DISABLE) || - (sd_ctrl_read16_and_16_as_32(host, CTL_STATUS) & TMIO_STAT_WRPROTECT)); - return ret; + return !((pdata->flags & TMIO_MMC_WRPROTECT_DISABLE) || + (sd_ctrl_read16_and_16_as_32(host, CTL_STATUS) & TMIO_STAT_WRPROTECT)); } static int tmio_multi_io_quirk(struct mmc_card *card, @@ -1098,7 +1078,7 @@ static int tmio_multi_io_quirk(struct mmc_card *card, return blk_size; } -static struct mmc_host_ops tmio_mmc_ops = { +static const struct mmc_host_ops tmio_mmc_ops = { .request = tmio_mmc_request, .set_ios = tmio_mmc_set_ios, .get_ro = tmio_mmc_get_ro, @@ -1145,19 +1125,45 @@ static void tmio_mmc_of_parse(struct platform_device *pdev, pdata->flags |= TMIO_MMC_WRPROTECT_DISABLE; } -struct tmio_mmc_host* -tmio_mmc_host_alloc(struct platform_device *pdev) +struct tmio_mmc_host *tmio_mmc_host_alloc(struct platform_device *pdev, + struct tmio_mmc_data *pdata) { struct tmio_mmc_host *host; struct mmc_host *mmc; + struct resource *res; + void __iomem *ctl; + int ret; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + ctl = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(ctl)) + return ERR_CAST(ctl); mmc = mmc_alloc_host(sizeof(struct tmio_mmc_host), &pdev->dev); if (!mmc) - return NULL; + return ERR_PTR(-ENOMEM); host = mmc_priv(mmc); + host->ctl = ctl; host->mmc = mmc; host->pdev = pdev; + host->pdata = pdata; + host->ops = tmio_mmc_ops; + mmc->ops = &host->ops; + + ret = mmc_of_parse(host->mmc); + if (ret) { + host = ERR_PTR(ret); + goto free; + } + + tmio_mmc_of_parse(pdev, pdata); + + platform_set_drvdata(pdev, host); + + return host; +free: + mmc_free_host(mmc); return host; } @@ -1169,32 +1175,24 @@ void tmio_mmc_host_free(struct tmio_mmc_host *host) } EXPORT_SYMBOL_GPL(tmio_mmc_host_free); -int tmio_mmc_host_probe(struct tmio_mmc_host *_host, - struct tmio_mmc_data *pdata, - const struct tmio_mmc_dma_ops *dma_ops) +int tmio_mmc_host_probe(struct tmio_mmc_host *_host) { struct platform_device *pdev = _host->pdev; + struct tmio_mmc_data *pdata = _host->pdata; struct mmc_host *mmc = _host->mmc; - struct resource *res_ctl; int ret; u32 irq_mask = TMIO_MASK_CMD; - tmio_mmc_of_parse(pdev, pdata); + /* + * Check the sanity of mmc->f_min to prevent tmio_mmc_set_clock() from + * looping forever... + */ + if (mmc->f_min == 0) + return -EINVAL; if (!(pdata->flags & TMIO_MMC_HAS_IDLE_WAIT)) _host->write16_hook = NULL; - res_ctl = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res_ctl) - return -EINVAL; - - ret = mmc_of_parse(mmc); - if (ret < 0) - return ret; - - _host->pdata = pdata; - platform_set_drvdata(pdev, mmc); - _host->set_pwr = pdata->set_pwr; _host->set_clk_div = pdata->set_clk_div; @@ -1202,15 +1200,11 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host, if (ret < 0) return ret; - _host->ctl = devm_ioremap(&pdev->dev, - res_ctl->start, resource_size(res_ctl)); - if (!_host->ctl) - return -ENOMEM; - - tmio_mmc_ops.card_busy = _host->card_busy; - tmio_mmc_ops.start_signal_voltage_switch = - _host->start_signal_voltage_switch; - mmc->ops = &tmio_mmc_ops; + if (pdata->flags & TMIO_MMC_USE_GPIO_CD) { + ret = mmc_gpio_request_cd(mmc, pdata->cd_gpio, 0); + if (ret) + return ret; + } mmc->caps |= MMC_CAP_4_BIT_DATA | pdata->capabilities; mmc->caps2 |= pdata->capabilities2; @@ -1233,7 +1227,10 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host, } mmc->max_seg_size = mmc->max_req_size; - _host->native_hotplug = !(pdata->flags & TMIO_MMC_USE_GPIO_CD || + if (mmc_can_gpio_ro(mmc)) + _host->ops.get_ro = mmc_gpio_get_ro; + + _host->native_hotplug = !(mmc_can_gpio_cd(mmc) || mmc->caps & MMC_CAP_NEEDS_POLL || !mmc_card_is_removable(mmc)); @@ -1246,18 +1243,6 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host, if (pdata->flags & TMIO_MMC_MIN_RCAR2) _host->native_hotplug = true; - if (tmio_mmc_clk_enable(_host) < 0) { - mmc->f_max = pdata->hclk; - mmc->f_min = mmc->f_max / 512; - } - - /* - * Check the sanity of mmc->f_min to prevent tmio_mmc_set_clock() from - * looping forever... - */ - if (mmc->f_min == 0) - return -EINVAL; - /* * While using internal tmio hardware logic for card detection, we need * to ensure it stays powered for it to work. @@ -1293,7 +1278,6 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host, INIT_WORK(&_host->done, tmio_mmc_done_work); /* See if we also get DMA */ - _host->dma_ops = dma_ops; tmio_mmc_request_dma(_host, pdata); pm_runtime_set_active(&pdev->dev); @@ -1307,14 +1291,6 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host, dev_pm_qos_expose_latency_limit(&pdev->dev, 100); - if (pdata->flags & TMIO_MMC_USE_GPIO_CD) { - ret = mmc_gpio_request_cd(mmc, pdata->cd_gpio, 0); - if (ret) - goto remove_host; - - mmc_gpiod_request_cd_irq(mmc); - } - return 0; remove_host: @@ -1343,16 +1319,27 @@ void tmio_mmc_host_remove(struct tmio_mmc_host *host) pm_runtime_put_sync(&pdev->dev); pm_runtime_disable(&pdev->dev); - - tmio_mmc_clk_disable(host); } EXPORT_SYMBOL_GPL(tmio_mmc_host_remove); #ifdef CONFIG_PM +static int tmio_mmc_clk_enable(struct tmio_mmc_host *host) +{ + if (!host->clk_enable) + return -ENOTSUPP; + + return host->clk_enable(host); +} + +static void tmio_mmc_clk_disable(struct tmio_mmc_host *host) +{ + if (host->clk_disable) + host->clk_disable(host); +} + int tmio_mmc_host_runtime_suspend(struct device *dev) { - struct mmc_host *mmc = dev_get_drvdata(dev); - struct tmio_mmc_host *host = mmc_priv(mmc); + struct tmio_mmc_host *host = dev_get_drvdata(dev); tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_ALL); @@ -1372,8 +1359,7 @@ static bool tmio_mmc_can_retune(struct tmio_mmc_host *host) int tmio_mmc_host_runtime_resume(struct device *dev) { - struct mmc_host *mmc = dev_get_drvdata(dev); - struct tmio_mmc_host *host = mmc_priv(mmc); + struct tmio_mmc_host *host = dev_get_drvdata(dev); tmio_mmc_reset(host); tmio_mmc_clk_enable(host); diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index e7743eca1021..85146235231e 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -324,6 +324,7 @@ struct mmc_host { #define MMC_CAP_DRIVER_TYPE_A (1 << 23) /* Host supports Driver Type A */ #define MMC_CAP_DRIVER_TYPE_C (1 << 24) /* Host supports Driver Type C */ #define MMC_CAP_DRIVER_TYPE_D (1 << 25) /* Host supports Driver Type D */ +#define MMC_CAP_DONE_COMPLETE (1 << 27) /* RW reqs can be completed within mmc_request_done() */ #define MMC_CAP_CD_WAKE (1 << 28) /* Enable card detect wake */ #define MMC_CAP_CMD_DURING_TFR (1 << 29) /* Commands during data transfer */ #define MMC_CAP_CMD23 (1 << 30) /* CMD23 supported. */ @@ -380,6 +381,7 @@ struct mmc_host { unsigned int doing_retune:1; /* re-tuning in progress */ unsigned int retune_now:1; /* do re-tuning at next req */ unsigned int retune_paused:1; /* re-tuning is temporarily disabled */ + unsigned int use_blk_mq:1; /* use blk-mq */ int rescan_disable; /* disable card detection */ int rescan_entered; /* used with nonremovable devices */ @@ -422,9 +424,6 @@ struct mmc_host { struct dentry *debugfs_root; - struct mmc_async_req *areq; /* active async req */ - struct mmc_context_info context_info; /* async synchronization info */ - /* Ongoing data transfer that allows commands during transfer */ struct mmc_request *ongoing_mrq; diff --git a/include/linux/mmc/slot-gpio.h b/include/linux/mmc/slot-gpio.h index 82f0d289f110..91f1ba0663c8 100644 --- a/include/linux/mmc/slot-gpio.h +++ b/include/linux/mmc/slot-gpio.h @@ -33,5 +33,6 @@ void mmc_gpio_set_cd_isr(struct mmc_host *host, irqreturn_t (*isr)(int irq, void *dev_id)); void mmc_gpiod_request_cd_irq(struct mmc_host *host); bool mmc_can_gpio_cd(struct mmc_host *host); +bool mmc_can_gpio_ro(struct mmc_host *host); #endif |