[PATCH 11/11] drm/xe: Kill xe_device_mem_access_{get*,put}

[Rodrigo Vivi <rodrigo.vivi@intel.com>]

Let's simply convert all the current callers towards direct
xe_pm_runtime access and remove this extra layer of indirection.

v2: Convert all the current callers instead of a big refactor
at once.

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
---
 drivers/gpu/drm/xe/display/xe_fb_pin.c |  7 ++---
 drivers/gpu/drm/xe/xe_bo.c             |  8 +++---
 drivers/gpu/drm/xe/xe_device.c         | 36 --------------------------
 drivers/gpu/drm/xe/xe_device.h         |  3 ---
 drivers/gpu/drm/xe/xe_device_types.h   |  3 ---
 drivers/gpu/drm/xe/xe_exec_queue.c     |  6 ++---
 drivers/gpu/drm/xe/xe_ggtt.c           |  9 ++++---
 drivers/gpu/drm/xe/xe_sched_job.c      |  5 ++--
 drivers/gpu/drm/xe/xe_vm.c             |  6 ++---
 9 files changed, 22 insertions(+), 61 deletions(-)

diff --git a/drivers/gpu/drm/xe/display/xe_fb_pin.c b/drivers/gpu/drm/xe/display/xe_fb_pin.c
index 722c84a56607..403ed2d42f6b 100644
--- a/drivers/gpu/drm/xe/display/xe_fb_pin.c
+++ b/drivers/gpu/drm/xe/display/xe_fb_pin.c
@@ -10,6 +10,7 @@
 #include "intel_fb_pin.h"
 #include "xe_ggtt.h"
 #include "xe_gt.h"
+#include "xe_pm.h"
 
 #include <drm/ttm/ttm_bo.h>
 
@@ -190,7 +191,7 @@ static int __xe_pin_fb_vma_ggtt(struct intel_framebuffer *fb,
 	/* TODO: Consider sharing framebuffer mapping?
 	 * embed i915_vma inside intel_framebuffer
 	 */
-	xe_device_mem_access_get(tile_to_xe(ggtt->tile));
+	xe_pm_runtime_get_noresume(tile_to_xe(ggtt->tile));
 	ret = mutex_lock_interruptible(&ggtt->lock);
 	if (ret)
 		goto out;
@@ -242,7 +243,7 @@ static int __xe_pin_fb_vma_ggtt(struct intel_framebuffer *fb,
 out_unlock:
 	mutex_unlock(&ggtt->lock);
 out:
-	xe_device_mem_access_put(tile_to_xe(ggtt->tile));
+	xe_pm_runtime_put(tile_to_xe(ggtt->tile));
 	return ret;
 }
 
@@ -381,4 +382,4 @@ struct i915_address_space *intel_dpt_create(struct intel_framebuffer *fb)
 void intel_dpt_destroy(struct i915_address_space *vm)
 {
 	return;
-}
\ No newline at end of file
+}
diff --git a/drivers/gpu/drm/xe/xe_bo.c b/drivers/gpu/drm/xe/xe_bo.c
index bc0cc5edc533..531c67083e2c 100644
--- a/drivers/gpu/drm/xe/xe_bo.c
+++ b/drivers/gpu/drm/xe/xe_bo.c
@@ -738,7 +738,7 @@ static int xe_bo_move(struct ttm_buffer_object *ttm_bo, bool evict,
 
 	xe_assert(xe, migrate);
 	trace_xe_bo_move(bo, new_mem->mem_type, old_mem_type, move_lacks_source);
-	xe_device_mem_access_get(xe);
+	xe_pm_runtime_get_noresume(xe);
 
 	if (xe_bo_is_pinned(bo) && !xe_bo_is_user(bo)) {
 		/*
@@ -762,7 +762,7 @@ static int xe_bo_move(struct ttm_buffer_object *ttm_bo, bool evict,
 
 				if (XE_WARN_ON(new_mem->start == XE_BO_INVALID_OFFSET)) {
 					ret = -EINVAL;
-					xe_device_mem_access_put(xe);
+					xe_pm_runtime_put(xe);
 					goto out;
 				}
 
@@ -780,7 +780,7 @@ static int xe_bo_move(struct ttm_buffer_object *ttm_bo, bool evict,
 						new_mem, handle_system_ccs);
 		if (IS_ERR(fence)) {
 			ret = PTR_ERR(fence);
-			xe_device_mem_access_put(xe);
+			xe_pm_runtime_put(xe);
 			goto out;
 		}
 		if (!move_lacks_source) {
@@ -805,7 +805,7 @@ static int xe_bo_move(struct ttm_buffer_object *ttm_bo, bool evict,
 		dma_fence_put(fence);
 	}
 
-	xe_device_mem_access_put(xe);
+	xe_pm_runtime_put(xe);
 
 out:
 	return ret;
diff --git a/drivers/gpu/drm/xe/xe_device.c b/drivers/gpu/drm/xe/xe_device.c
index 58815e9bf242..e2e6b6dc8534 100644
--- a/drivers/gpu/drm/xe/xe_device.c
+++ b/drivers/gpu/drm/xe/xe_device.c
@@ -655,42 +655,6 @@ void xe_device_assert_mem_access(struct xe_device *xe)
 	XE_WARN_ON(xe_pm_runtime_suspended(xe));
 }
 
-void xe_device_mem_access_get(struct xe_device *xe)
-{
-	int ref;
-
-	/*
-	 * This looks racy, but should be fine since the pm_callback_task only
-	 * transitions from NULL -> current (and back to NULL again), during the
-	 * runtime_resume() or runtime_suspend() callbacks, for which there can
-	 * only be a single one running for our device. We only need to prevent
-	 * recursively calling the runtime_get or runtime_put from those
-	 * callbacks, as well as preventing triggering any access_ongoing
-	 * asserts.
-	 */
-	if (xe_pm_read_callback_task(xe) == current)
-		return;
-
-	xe_pm_runtime_get_noresume(xe);
-	ref = atomic_inc_return(&xe->mem_access.ref);
-
-	xe_assert(xe, ref != S32_MAX);
-
-}
-
-void xe_device_mem_access_put(struct xe_device *xe)
-{
-	int ref;
-
-	if (xe_pm_read_callback_task(xe) == current)
-		return;
-
-	ref = atomic_dec_return(&xe->mem_access.ref);
-	xe_pm_runtime_put(xe);
-
-	xe_assert(xe, ref >= 0);
-}
-
 void xe_device_snapshot_print(struct xe_device *xe, struct drm_printer *p)
 {
 	struct xe_gt *gt;
diff --git a/drivers/gpu/drm/xe/xe_device.h b/drivers/gpu/drm/xe/xe_device.h
index b45592b0bf19..355bddfc8274 100644
--- a/drivers/gpu/drm/xe/xe_device.h
+++ b/drivers/gpu/drm/xe/xe_device.h
@@ -133,9 +133,6 @@ static inline struct xe_force_wake *gt_to_fw(struct xe_gt *gt)
 	return &gt->mmio.fw;
 }
 
-void xe_device_mem_access_get(struct xe_device *xe);
-void xe_device_mem_access_put(struct xe_device *xe);
-
 void xe_device_assert_mem_access(struct xe_device *xe);
 
 static inline bool xe_device_in_fault_mode(struct xe_device *xe)
diff --git a/drivers/gpu/drm/xe/xe_device_types.h b/drivers/gpu/drm/xe/xe_device_types.h
index 9785eef2e5a4..4bec8b90a37c 100644
--- a/drivers/gpu/drm/xe/xe_device_types.h
+++ b/drivers/gpu/drm/xe/xe_device_types.h
@@ -377,9 +377,6 @@ struct xe_device {
 	 * triggering additional actions when they occur.
 	 */
 	struct {
-		/** @mem_access.ref: ref count of memory accesses */
-		atomic_t ref;
-
 		/**
 		 * @mem_access.vram_userfault: Encapsulate vram_userfault
 		 * related stuff
diff --git a/drivers/gpu/drm/xe/xe_exec_queue.c b/drivers/gpu/drm/xe/xe_exec_queue.c
index f69a9c99329c..42ddf857e9e8 100644
--- a/drivers/gpu/drm/xe/xe_exec_queue.c
+++ b/drivers/gpu/drm/xe/xe_exec_queue.c
@@ -217,7 +217,7 @@ void xe_exec_queue_fini(struct xe_exec_queue *q)
 	for (i = 0; i < q->width; ++i)
 		xe_lrc_finish(q->lrc + i);
 	if (!(q->flags & EXEC_QUEUE_FLAG_PERMANENT) && (q->flags & EXEC_QUEUE_FLAG_VM || !q->vm))
-		xe_device_mem_access_put(gt_to_xe(q->gt));
+		xe_pm_runtime_put(gt_to_xe(q->gt));
 	__xe_exec_queue_free(q);
 }
 
@@ -589,7 +589,7 @@ int xe_exec_queue_create_ioctl(struct drm_device *dev, void *data,
 				return -EINVAL;
 
 			/* The migration vm doesn't hold rpm ref */
-			xe_device_mem_access_get(xe);
+			xe_pm_runtime_get_noresume(xe);
 
 			flags = EXEC_QUEUE_FLAG_VM | (id ? EXEC_QUEUE_FLAG_BIND_ENGINE_CHILD : 0);
 
@@ -598,7 +598,7 @@ int xe_exec_queue_create_ioctl(struct drm_device *dev, void *data,
 						   args->width, hwe, flags,
 						   args->extensions);
 
-			xe_device_mem_access_put(xe); /* now held by engine */
+			xe_pm_runtime_put(xe); /* now held by engine */
 
 			xe_vm_put(migrate_vm);
 			if (IS_ERR(new)) {
diff --git a/drivers/gpu/drm/xe/xe_ggtt.c b/drivers/gpu/drm/xe/xe_ggtt.c
index 0f96b7db6dcc..d73056aa2362 100644
--- a/drivers/gpu/drm/xe/xe_ggtt.c
+++ b/drivers/gpu/drm/xe/xe_ggtt.c
@@ -20,6 +20,7 @@
 #include "xe_gt_printk.h"
 #include "xe_gt_tlb_invalidation.h"
 #include "xe_map.h"
+#include "xe_pm.h"
 #include "xe_sriov.h"
 #include "xe_wopcm.h"
 
@@ -408,14 +409,14 @@ static int __xe_ggtt_insert_bo_at(struct xe_ggtt *ggtt, struct xe_bo *bo,
 	if (err)
 		return err;
 
-	xe_device_mem_access_get(tile_to_xe(ggtt->tile));
+	xe_pm_runtime_get_noresume(tile_to_xe(ggtt->tile));
 	mutex_lock(&ggtt->lock);
 	err = drm_mm_insert_node_in_range(&ggtt->mm, &bo->ggtt_node, bo->size,
 					  alignment, 0, start, end, 0);
 	if (!err)
 		xe_ggtt_map_bo(ggtt, bo);
 	mutex_unlock(&ggtt->lock);
-	xe_device_mem_access_put(tile_to_xe(ggtt->tile));
+	xe_pm_runtime_put(tile_to_xe(ggtt->tile));
 
 	return err;
 }
@@ -433,7 +434,7 @@ int xe_ggtt_insert_bo(struct xe_ggtt *ggtt, struct xe_bo *bo)
 
 void xe_ggtt_remove_node(struct xe_ggtt *ggtt, struct drm_mm_node *node)
 {
-	xe_device_mem_access_get(tile_to_xe(ggtt->tile));
+	xe_pm_runtime_get_noresume(tile_to_xe(ggtt->tile));
 	mutex_lock(&ggtt->lock);
 
 	xe_ggtt_clear(ggtt, node->start, node->size);
@@ -443,7 +444,7 @@ void xe_ggtt_remove_node(struct xe_ggtt *ggtt, struct drm_mm_node *node)
 	xe_ggtt_invalidate(ggtt);
 
 	mutex_unlock(&ggtt->lock);
-	xe_device_mem_access_put(tile_to_xe(ggtt->tile));
+	xe_pm_runtime_put(tile_to_xe(ggtt->tile));
 }
 
 void xe_ggtt_remove_bo(struct xe_ggtt *ggtt, struct xe_bo *bo)
diff --git a/drivers/gpu/drm/xe/xe_sched_job.c b/drivers/gpu/drm/xe/xe_sched_job.c
index 8151ddafb940..8ba35b1698ed 100644
--- a/drivers/gpu/drm/xe/xe_sched_job.c
+++ b/drivers/gpu/drm/xe/xe_sched_job.c
@@ -15,6 +15,7 @@
 #include "xe_hw_fence.h"
 #include "xe_lrc.h"
 #include "xe_macros.h"
+#include "xe_pm.h"
 #include "xe_trace.h"
 #include "xe_vm.h"
 
@@ -157,7 +158,7 @@ struct xe_sched_job *xe_sched_job_create(struct xe_exec_queue *q,
 
 	/* All other jobs require a VM to be open which has a ref */
 	if (unlikely(q->flags & EXEC_QUEUE_FLAG_KERNEL))
-		xe_device_mem_access_get(job_to_xe(job));
+		xe_pm_runtime_get_noresume(job_to_xe(job));
 	xe_device_assert_mem_access(job_to_xe(job));
 
 	trace_xe_sched_job_create(job);
@@ -190,7 +191,7 @@ void xe_sched_job_destroy(struct kref *ref)
 		container_of(ref, struct xe_sched_job, refcount);
 
 	if (unlikely(job->q->flags & EXEC_QUEUE_FLAG_KERNEL))
-		xe_device_mem_access_put(job_to_xe(job));
+		xe_pm_runtime_put(job_to_xe(job));
 	xe_exec_queue_put(job->q);
 	dma_fence_put(job->fence);
 	drm_sched_job_cleanup(&job->drm);
diff --git a/drivers/gpu/drm/xe/xe_vm.c b/drivers/gpu/drm/xe/xe_vm.c
index 643b3701a738..84360f4a1b60 100644
--- a/drivers/gpu/drm/xe/xe_vm.c
+++ b/drivers/gpu/drm/xe/xe_vm.c
@@ -1324,7 +1324,7 @@ struct xe_vm *xe_vm_create(struct xe_device *xe, u32 flags)
 	vm->pt_ops = &xelp_pt_ops;
 
 	if (!(flags & XE_VM_FLAG_MIGRATION))
-		xe_device_mem_access_get(xe);
+		xe_pm_runtime_get_noresume(xe);
 
 	vm_resv_obj = drm_gpuvm_resv_object_alloc(&xe->drm);
 	if (!vm_resv_obj) {
@@ -1435,7 +1435,7 @@ struct xe_vm *xe_vm_create(struct xe_device *xe, u32 flags)
 		xe_range_fence_tree_fini(&vm->rftree[id]);
 	kfree(vm);
 	if (!(flags & XE_VM_FLAG_MIGRATION))
-		xe_device_mem_access_put(xe);
+		xe_pm_runtime_put(xe);
 	return ERR_PTR(err);
 }
 
@@ -1558,7 +1558,7 @@ static void vm_destroy_work_func(struct work_struct *w)
 	mutex_destroy(&vm->snap_mutex);
 
 	if (!(vm->flags & XE_VM_FLAG_MIGRATION)) {
-		xe_device_mem_access_put(xe);
+		xe_pm_runtime_put(xe);
 
 		if (xe->info.has_asid && vm->usm.asid) {
 			mutex_lock(&xe->usm.lock);
-- 
2.44.0