1 files changed, 129 insertions, 0 deletions
diff --git a/drivers/gpu/arm/midgard/mali_kbase_instr.c b/drivers/gpu/arm/midgard/mali_kbase_instr.c
new file mode 100644
index 000000000000..fda317b90176
--- /dev/null
+++ b/drivers/gpu/arm/midgard/mali_kbase_instr.c
@@ -0,0 +1,129 @@
+/*
+ *
+ * (C) COPYRIGHT 2011-2015 ARM Limited. All rights reserved.
+ *
+ * This program is free software and is provided to you under the terms of the
+ * GNU General Public License version 2 as published by the Free Software
+ * Foundation, and any use by you of this program is subject to the terms
+ * of such GNU licence.
+ *
+ * A copy of the licence is included with the program, and can also be obtained
+ * from Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA  02110-1301, USA.
+ *
+ */
+
+
+
+
+
+/*
+ * Base kernel instrumentation APIs.
+ */
+
+#include <mali_kbase.h>
+#include <mali_midg_regmap.h>
+
+void kbase_instr_hwcnt_suspend(struct kbase_device *kbdev)
+{
+	struct kbase_context *kctx;
+
+	KBASE_DEBUG_ASSERT(kbdev);
+	KBASE_DEBUG_ASSERT(!kbdev->hwcnt.suspended_kctx);
+
+	kctx = kbdev->hwcnt.kctx;
+	kbdev->hwcnt.suspended_kctx = kctx;
+
+	/* Relevant state was saved into hwcnt.suspended_state when enabling the
+	 * counters */
+
+	if (kctx) {
+		KBASE_DEBUG_ASSERT(kctx->jctx.sched_info.ctx.flags &
+						KBASE_CTX_FLAG_PRIVILEGED);
+		kbase_instr_hwcnt_disable(kctx);
+	}
+}
+
+void kbase_instr_hwcnt_resume(struct kbase_device *kbdev)
+{
+	struct kbase_context *kctx;
+
+	KBASE_DEBUG_ASSERT(kbdev);
+
+	kctx = kbdev->hwcnt.suspended_kctx;
+	kbdev->hwcnt.suspended_kctx = NULL;
+
+	if (kctx) {
+		int err;
+
+		err = kbase_instr_hwcnt_enable_internal(kbdev, kctx,
+						&kbdev->hwcnt.suspended_state);
+		WARN(err, "Failed to restore instrumented hardware counters on resume\n");
+	}
+}
+
+int kbase_instr_hwcnt_enable(struct kbase_context *kctx,
+		struct kbase_uk_hwcnt_setup *setup)
+{
+	struct kbase_device *kbdev;
+	int err;
+
+	kbdev = kctx->kbdev;
+
+	/* Mark the context as active so the GPU is kept turned on */
+	/* A suspend won't happen here, because we're in a syscall from a
+	 * userspace thread. */
+	kbase_pm_context_active(kbdev);
+
+	/* Schedule the context in */
+	kbasep_js_schedule_privileged_ctx(kbdev, kctx);
+	err = kbase_instr_hwcnt_enable_internal(kbdev, kctx, setup);
+	if (err) {
+		/* Release the context. This had its own Power Manager Active
+		 * reference */
+		kbasep_js_release_privileged_ctx(kbdev, kctx);
+
+		/* Also release our Power Manager Active reference */
+		kbase_pm_context_idle(kbdev);
+	}
+
+	return err;
+}
+KBASE_EXPORT_SYMBOL(kbase_instr_hwcnt_enable);
+
+int kbase_instr_hwcnt_disable(struct kbase_context *kctx)
+{
+	int err = -EINVAL;
+	struct kbase_device *kbdev = kctx->kbdev;
+
+	err = kbase_instr_hwcnt_disable_internal(kctx);
+	if (err)
+		goto out;
+
+	/* Release the context. This had its own Power Manager Active reference
+	 */
+	kbasep_js_release_privileged_ctx(kbdev, kctx);
+
+	/* Also release our Power Manager Active reference */
+	kbase_pm_context_idle(kbdev);
+
+	dev_dbg(kbdev->dev, "HW counters dumping disabled for context %p",
+									kctx);
+out:
+	return err;
+}
+KBASE_EXPORT_SYMBOL(kbase_instr_hwcnt_disable);
+
+int kbase_instr_hwcnt_dump(struct kbase_context *kctx)
+{
+	int err;
+
+	err = kbase_instr_hwcnt_request_dump(kctx);
+	if (err)
+		return err;
+
+	err = kbase_instr_hwcnt_wait_for_dump(kctx);
+	return err;
+}
+KBASE_EXPORT_SYMBOL(kbase_instr_hwcnt_dump);
+