1 files changed, 430 insertions, 0 deletions
diff --git a/drivers/gpu/arm/t6xx/kbase/src/common/mali_kbase_softjobs.c b/drivers/gpu/arm/t6xx/kbase/src/common/mali_kbase_softjobs.c
new file mode 100755
index 00000000000..981a90b4d4a
--- /dev/null
+++ b/drivers/gpu/arm/t6xx/kbase/src/common/mali_kbase_softjobs.c
@@ -0,0 +1,430 @@
+/*
+ *
+ * (C) COPYRIGHT 2011-2013 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.
+ *
+ */
+
+
+
+#include <kbase/src/common/mali_kbase.h>
+
+#ifdef CONFIG_SYNC
+#include <linux/sync.h>
+#include <linux/syscalls.h>
+#include "../linux/mali_kbase_sync.h"
+#endif
+
+
+/* Mask to check cache alignment of data structures */
+#define KBASE_CACHE_ALIGNMENT_MASK		((1<<CONFIG_ARM_L1_CACHE_SHIFT)-1)
+
+/**
+ * @file mali_kbase_softjobs.c
+ *
+ * This file implements the logic behind software only jobs that are
+ * executed within the driver rather than being handed over to the GPU.
+ */
+
+static int kbase_dump_cpu_gpu_time(kbase_jd_atom *katom)
+{
+	kbase_va_region *reg;
+	phys_addr_t addr;
+	u64 pfn;
+	u32 offset;
+	char *page;
+	struct timespec ts;
+	base_dump_cpu_gpu_counters data;
+	u64 system_time;
+	u64 cycle_counter;
+	mali_addr64 jc = katom->jc;
+	kbase_context *kctx = katom->kctx;
+	int pm_active_err;
+
+	u32 hi1, hi2;
+
+	memset(&data, 0, sizeof(data));
+
+	/* Take the PM active reference as late as possible - otherwise, it could
+	 * delay suspend until we process the atom (which may be at the end of a
+	 * long chain of dependencies */
+	pm_active_err = kbase_pm_context_active_handle_suspend(kctx->kbdev, KBASE_PM_SUSPEND_HANDLER_DONT_REACTIVATE);
+	if (pm_active_err) {
+		kbasep_js_device_data *js_devdata = &kctx->kbdev->js_data;
+
+		/* We're suspended - queue this on the list of suspended jobs
+		 * Use dep_item[1], because dep_item[0] is in use for 'waiting_soft_jobs' */
+		mutex_lock(&js_devdata->runpool_mutex);
+		list_add_tail(&katom->dep_item[1], &js_devdata->suspended_soft_jobs_list);
+		mutex_unlock(&js_devdata->runpool_mutex);
+
+		return pm_active_err;
+	}
+
+	kbase_pm_request_gpu_cycle_counter(kctx->kbdev);
+
+	/* Read hi, lo, hi to ensure that overflow from lo to hi is handled correctly */
+	do {
+		hi1 = kbase_reg_read(kctx->kbdev, GPU_CONTROL_REG(CYCLE_COUNT_HI), NULL);
+		cycle_counter = kbase_reg_read(kctx->kbdev, GPU_CONTROL_REG(CYCLE_COUNT_LO), NULL);
+		hi2 = kbase_reg_read(kctx->kbdev, GPU_CONTROL_REG(CYCLE_COUNT_HI), NULL);
+		cycle_counter |= (((u64) hi1) << 32);
+	} while (hi1 != hi2);
+
+	/* Read hi, lo, hi to ensure that overflow from lo to hi is handled correctly */
+	do {
+		hi1 = kbase_reg_read(kctx->kbdev, GPU_CONTROL_REG(TIMESTAMP_HI), NULL);
+		system_time = kbase_reg_read(kctx->kbdev, GPU_CONTROL_REG(TIMESTAMP_LO), NULL);
+		hi2 = kbase_reg_read(kctx->kbdev, GPU_CONTROL_REG(TIMESTAMP_HI), NULL);
+		system_time |= (((u64) hi1) << 32);
+	} while (hi1 != hi2);
+
+	/* Record the CPU's idea of current time */
+	getnstimeofday(&ts);
+
+	kbase_pm_release_gpu_cycle_counter(kctx->kbdev);
+
+	kbase_pm_context_idle(kctx->kbdev);
+
+	data.sec = ts.tv_sec;
+	data.usec = ts.tv_nsec / 1000;
+	data.system_time = system_time;
+	data.cycle_counter = cycle_counter;
+
+	pfn = jc >> 12;
+	offset = jc & 0xFFF;
+
+	/* Assume this atom will be cancelled until we know otherwise */
+	katom->event_code = BASE_JD_EVENT_JOB_CANCELLED;
+	if (offset > 0x1000 - sizeof(data)) {
+		/* Wouldn't fit in the page */
+		return 0;
+	}
+
+	reg = kbase_region_tracker_find_region_enclosing_address(kctx, jc);
+	if (!reg)
+		return 0;
+
+	if (!(reg->flags & KBASE_REG_GPU_WR)) {
+		/* Region is not writable by GPU so we won't write to it either */
+		return 0;
+	}
+
+	if (!reg->phy_pages)
+		return 0;
+
+	addr = reg->phy_pages[pfn - reg->start_pfn];
+	if (!addr)
+		return 0;
+
+	page = kmap(pfn_to_page(PFN_DOWN(addr)));
+	if (!page)
+		return 0;
+
+	memcpy(page + offset, &data, sizeof(data));
+	kbase_sync_to_cpu(addr + offset, page + offset, sizeof(data));
+	kunmap(pfn_to_page(PFN_DOWN(addr)));
+
+	/* Atom was fine - mark it as done */
+	katom->event_code = BASE_JD_EVENT_DONE;
+
+	return 0;
+}
+
+#ifdef CONFIG_SYNC
+
+/* Complete an atom that has returned '1' from kbase_process_soft_job (i.e. has waited)
+ *
+ * @param katom     The atom to complete
+ */
+static void complete_soft_job(kbase_jd_atom *katom)
+{
+	kbase_context *kctx = katom->kctx;
+
+	mutex_lock(&kctx->jctx.lock);
+	list_del(&katom->dep_item[0]);
+	kbase_finish_soft_job(katom);
+	if (jd_done_nolock(katom))
+		kbasep_js_try_schedule_head_ctx(kctx->kbdev);
+	mutex_unlock(&kctx->jctx.lock);
+}
+
+static base_jd_event_code kbase_fence_trigger(kbase_jd_atom *katom, int result)
+{
+	struct sync_pt *pt;
+	struct sync_timeline *timeline;
+
+	if (!list_is_singular(&katom->fence->pt_list_head)) {
+		/* Not exactly one item in the list - so it didn't (directly) come from us */
+		return BASE_JD_EVENT_JOB_CANCELLED;
+	}
+
+	pt = list_first_entry(&katom->fence->pt_list_head, struct sync_pt, pt_list);
+	timeline = pt->parent;
+
+	if (!kbase_sync_timeline_is_ours(timeline)) {
+		/* Fence has a sync_pt which isn't ours! */
+		return BASE_JD_EVENT_JOB_CANCELLED;
+	}
+
+	kbase_sync_signal_pt(pt, result);
+
+	sync_timeline_signal(timeline);
+
+	return (result < 0) ? BASE_JD_EVENT_JOB_CANCELLED : BASE_JD_EVENT_DONE;
+}
+
+static void kbase_fence_wait_worker(struct work_struct *data)
+{
+	kbase_jd_atom *katom;
+	kbase_context *kctx;
+
+	katom = container_of(data, kbase_jd_atom, work);
+	kctx = katom->kctx;
+
+	complete_soft_job(katom);
+}
+
+static void kbase_fence_wait_callback(struct sync_fence *fence, struct sync_fence_waiter *waiter)
+{
+	kbase_jd_atom *katom = container_of(waiter, kbase_jd_atom, sync_waiter);
+	kbase_context *kctx;
+
+	KBASE_DEBUG_ASSERT(NULL != katom);
+
+	kctx = katom->kctx;
+
+	KBASE_DEBUG_ASSERT(NULL != kctx);
+
+	/* Propagate the fence status to the atom.
+	 * If negative then cancel this atom and its dependencies.
+	 */
+	if (fence->status < 0)
+	{
+		katom->event_code = BASE_JD_EVENT_JOB_CANCELLED;
+	}
+
+	/* To prevent a potential deadlock we schedule the work onto the job_done_wq workqueue
+	 *
+	 * The issue is that we may signal the timeline while holding kctx->jctx.lock and
+	 * the callbacks are run synchronously from sync_timeline_signal. So we simply defer the work.
+	 */
+
+	KBASE_DEBUG_ASSERT(0 == object_is_on_stack(&katom->work));
+	INIT_WORK(&katom->work, kbase_fence_wait_worker);
+	queue_work(kctx->jctx.job_done_wq, &katom->work);
+}
+
+static int kbase_fence_wait(kbase_jd_atom *katom)
+{
+	int ret;
+
+	KBASE_DEBUG_ASSERT(NULL != katom);
+	KBASE_DEBUG_ASSERT(NULL != katom->kctx);
+
+	sync_fence_waiter_init(&katom->sync_waiter, kbase_fence_wait_callback);
+
+	ret = sync_fence_wait_async(katom->fence, &katom->sync_waiter);
+
+	if (ret == 1) {
+		/* Already signalled */
+		return 0;
+	} else if (ret < 0) {
+		goto cancel_atom;
+	}
+	return 1;
+
+ cancel_atom:
+	katom->event_code = BASE_JD_EVENT_JOB_CANCELLED;
+	/* We should cause the dependant jobs in the bag to be failed,
+	 * to do this we schedule the work queue to complete this job */
+	KBASE_DEBUG_ASSERT(0 == object_is_on_stack(&katom->work));
+	INIT_WORK(&katom->work, kbase_fence_wait_worker);
+	queue_work(katom->kctx->jctx.job_done_wq, &katom->work);
+	return 1;
+}
+
+static void kbase_fence_cancel_wait(kbase_jd_atom *katom)
+{
+	if (sync_fence_cancel_async(katom->fence, &katom->sync_waiter) != 0)
+	{
+		/* The wait wasn't cancelled - leave the cleanup for kbase_fence_wait_callback */
+		return;
+	}
+
+	/* Wait was cancelled - zap the atoms */
+	katom->event_code = BASE_JD_EVENT_JOB_CANCELLED;
+
+	kbase_finish_soft_job(katom);
+
+	if (jd_done_nolock(katom))
+		kbasep_js_try_schedule_head_ctx(katom->kctx->kbdev);
+}
+#endif /* CONFIG_SYNC */
+
+int kbase_process_soft_job(kbase_jd_atom *katom)
+{
+	switch (katom->core_req) {
+	case BASE_JD_REQ_SOFT_DUMP_CPU_GPU_TIME:
+		return kbase_dump_cpu_gpu_time(katom);
+#ifdef CONFIG_SYNC
+	case BASE_JD_REQ_SOFT_FENCE_TRIGGER:
+		KBASE_DEBUG_ASSERT(katom->fence != NULL);
+		katom->event_code = kbase_fence_trigger(katom, katom->event_code == BASE_JD_EVENT_DONE ? 0 : -EFAULT);
+		/* Release the reference as we don't need it any more */
+		sync_fence_put(katom->fence);
+		katom->fence = NULL;
+		break;
+	case BASE_JD_REQ_SOFT_FENCE_WAIT:
+		return kbase_fence_wait(katom);
+#endif				/* CONFIG_SYNC */
+	}
+
+	/* Atom is complete */
+	return 0;
+}
+
+void kbase_cancel_soft_job(kbase_jd_atom *katom)
+{
+	switch (katom->core_req) {
+#ifdef CONFIG_SYNC
+	case BASE_JD_REQ_SOFT_FENCE_WAIT:
+		kbase_fence_cancel_wait(katom);
+		break;
+#endif
+	default:
+		/* This soft-job doesn't support cancellation! */
+		KBASE_DEBUG_ASSERT(0);
+	}
+}
+
+mali_error kbase_prepare_soft_job(kbase_jd_atom *katom)
+{
+	switch (katom->core_req) {
+	case BASE_JD_REQ_SOFT_DUMP_CPU_GPU_TIME:
+		{
+			if(0 != (katom->jc & KBASE_CACHE_ALIGNMENT_MASK))
+				return MALI_ERROR_FUNCTION_FAILED;
+		}
+		break;
+#ifdef CONFIG_SYNC
+	case BASE_JD_REQ_SOFT_FENCE_TRIGGER:
+		{
+			base_fence fence;
+			int fd;
+			if (0 != copy_from_user(&fence, (__user void *)(uintptr_t) katom->jc, sizeof(fence)))
+				return MALI_ERROR_FUNCTION_FAILED;
+
+			fd = kbase_stream_create_fence(fence.basep.stream_fd);
+			if (fd < 0)
+				return MALI_ERROR_FUNCTION_FAILED;
+
+			katom->fence = sync_fence_fdget(fd);
+
+			if (katom->fence == NULL) {
+				/* The only way the fence can be NULL is if userspace closed it for us.
+				 * So we don't need to clear it up */
+				return MALI_ERROR_FUNCTION_FAILED;
+			}
+			fence.basep.fd = fd;
+			if (0 != copy_to_user((__user void *)(uintptr_t) katom->jc, &fence, sizeof(fence))) {
+				katom->fence = NULL;
+				sys_close(fd);
+				return MALI_ERROR_FUNCTION_FAILED;
+			}
+		}
+		break;
+	case BASE_JD_REQ_SOFT_FENCE_WAIT:
+		{
+			base_fence fence;
+			if (0 != copy_from_user(&fence, (__user void *)(uintptr_t) katom->jc, sizeof(fence)))
+				return MALI_ERROR_FUNCTION_FAILED;
+
+			/* Get a reference to the fence object */
+			katom->fence = sync_fence_fdget(fence.basep.fd);
+			if (katom->fence == NULL)
+				return MALI_ERROR_FUNCTION_FAILED;
+		}
+		break;
+#endif				/* CONFIG_SYNC */
+	default:
+		/* Unsupported soft-job */
+		return MALI_ERROR_FUNCTION_FAILED;
+	}
+	return MALI_ERROR_NONE;
+}
+
+void kbase_finish_soft_job(kbase_jd_atom *katom)
+{
+	switch (katom->core_req) {
+	case BASE_JD_REQ_SOFT_DUMP_CPU_GPU_TIME:
+		/* Nothing to do */
+		break;
+#ifdef CONFIG_SYNC
+	case BASE_JD_REQ_SOFT_FENCE_TRIGGER:
+		if (katom->fence) {
+			/* The fence has not yet been signalled, so we do it now */
+			kbase_fence_trigger(katom, katom->event_code == BASE_JD_EVENT_DONE ? 0 : -EFAULT);
+			sync_fence_put(katom->fence);
+			katom->fence = NULL;
+		}
+		break;
+	case BASE_JD_REQ_SOFT_FENCE_WAIT:
+		/* Release the reference to the fence object */
+		sync_fence_put(katom->fence);
+		katom->fence = NULL;
+		break;
+#endif				/* CONFIG_SYNC */
+	}
+}
+
+void kbase_resume_suspended_soft_jobs(kbase_device *kbdev)
+{
+	LIST_HEAD(local_suspended_soft_jobs);
+	kbase_jd_atom *tmp_iter;
+	kbase_jd_atom *katom_iter;
+	kbasep_js_device_data *js_devdata;
+	mali_bool resched = MALI_FALSE;
+	KBASE_DEBUG_ASSERT(kbdev);
+
+	js_devdata = &kbdev->js_data;
+
+	/* Move out the entire list */
+	mutex_lock(&js_devdata->runpool_mutex);
+	list_splice_init(&js_devdata->suspended_soft_jobs_list, &local_suspended_soft_jobs);
+	mutex_unlock(&js_devdata->runpool_mutex);
+
+	/* Each atom must be detached from the list and ran separately - it could
+	 * be re-added to the old list, but this is unlikely */
+	list_for_each_entry_safe(katom_iter, tmp_iter, &local_suspended_soft_jobs, dep_item[1])
+	{
+		kbase_context *kctx = katom_iter->kctx;
+		mutex_lock(&kctx->jctx.lock);
+
+		/* Remove from the global list */
+		list_del(&katom_iter->dep_item[1]);
+		/* Remove from the context's list of waiting soft jobs */
+		list_del(&katom_iter->dep_item[0]);
+
+		if (kbase_process_soft_job(katom_iter) == 0) {
+			kbase_finish_soft_job(katom_iter);
+			resched |= jd_done_nolock(katom_iter);
+		} else {
+			/* The job has not completed */
+			list_add_tail(&katom_iter->dep_item[0], &kctx->waiting_soft_jobs);
+		}
+
+		mutex_unlock(&kctx->jctx.lock);
+	}
+
+	if (resched)
+		kbasep_js_try_schedule_head_ctx(kbdev);
+}