drm/xe: Remove useless mem_access during probe

xe_pm_init is the very last thing during the xe_pci_probe(),
hence these protections are useless from the point of view
of ensuring that the device is awake.

Let's remove it so we continue towards the goal of killing
xe_device_mem_access.

v2: Adding more cases
v3: Provide a separate fix for xe_tile_init_noalloc return (Matt)
    Adding a new case where display HDCP init calls which
    are also called at display probe time.

Cc: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240417203952.25503-5-rodrigo.vivi@intel.comSigned-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

drivers/gpu/drm/xe/display/xe_hdcp_gsc.c

@@ -70,7 +70,6 @@ static int intel_hdcp_gsc_initialize_message(struct xe_device *xe,
 	int ret = 0;
 
 	/* allocate object of two page for HDCP command memory and store it */
-	xe_device_mem_access_get(xe);
 	bo = xe_bo_create_pin_map(xe, xe_device_get_root_tile(xe), NULL, PAGE_SIZE * 2,
 				  ttm_bo_type_kernel,
 				  XE_BO_FLAG_SYSTEM |
@@ -90,7 +89,6 @@ static int intel_hdcp_gsc_initialize_message(struct xe_device *xe,
 	hdcp_message->hdcp_cmd_in = cmd_in;
 	hdcp_message->hdcp_cmd_out = cmd_out;
 out:
-	xe_device_mem_access_put(xe);
 	return ret;
 }
 

drivers/gpu/drm/xe/xe_ggtt.c

@@ -203,14 +203,12 @@ static void xe_ggtt_initial_clear(struct xe_ggtt *ggtt)
 	u64 start, end;
 
 	/* Display may have allocated inside ggtt, so be careful with clearing here */
-	xe_device_mem_access_get(tile_to_xe(ggtt->tile));
 	mutex_lock(&ggtt->lock);
 	drm_mm_for_each_hole(hole, &ggtt->mm, start, end)
 		xe_ggtt_clear(ggtt, start, end - start);
 
 	xe_ggtt_invalidate(ggtt);
 	mutex_unlock(&ggtt->lock);
-	xe_device_mem_access_put(tile_to_xe(ggtt->tile));
 }
 
 int xe_ggtt_init(struct xe_ggtt *ggtt)

drivers/gpu/drm/xe/xe_gt.c

@@ -354,7 +354,6 @@ static int gt_fw_domain_init(struct xe_gt *gt)
 {
 	int err, i;
 
-	xe_device_mem_access_get(gt_to_xe(gt));
 	err = xe_force_wake_get(gt_to_fw(gt), XE_FW_GT);
 	if (err)
 		goto err_hw_fence_irq;
@@ -396,7 +395,6 @@ static int gt_fw_domain_init(struct xe_gt *gt)
 
 	err = xe_force_wake_put(gt_to_fw(gt), XE_FW_GT);
 	XE_WARN_ON(err);
-	xe_device_mem_access_put(gt_to_xe(gt));
 
 	return 0;
 
@@ -406,7 +404,6 @@ static int gt_fw_domain_init(struct xe_gt *gt)
 err_hw_fence_irq:
 	for (i = 0; i < XE_ENGINE_CLASS_MAX; ++i)
 		xe_hw_fence_irq_finish(&gt->fence_irq[i]);
-	xe_device_mem_access_put(gt_to_xe(gt));
 
 	return err;
 }
@@ -415,7 +412,6 @@ static int all_fw_domain_init(struct xe_gt *gt)
 {
 	int err, i;
 
-	xe_device_mem_access_get(gt_to_xe(gt));
 	err = xe_force_wake_get(gt_to_fw(gt), XE_FORCEWAKE_ALL);
 	if (err)
 		goto err_hw_fence_irq;
@@ -481,7 +477,6 @@ static int all_fw_domain_init(struct xe_gt *gt)
 
 	err = xe_force_wake_put(gt_to_fw(gt), XE_FORCEWAKE_ALL);
 	XE_WARN_ON(err);
-	xe_device_mem_access_put(gt_to_xe(gt));
 
 	return 0;
 
@@ -490,7 +485,6 @@ static int all_fw_domain_init(struct xe_gt *gt)
 err_hw_fence_irq:
 	for (i = 0; i < XE_ENGINE_CLASS_MAX; ++i)
 		xe_hw_fence_irq_finish(&gt->fence_irq[i]);
-	xe_device_mem_access_put(gt_to_xe(gt));
 
 	return err;
 }
@@ -503,7 +497,6 @@ int xe_gt_init_hwconfig(struct xe_gt *gt)
 {
 	int err;
 
-	xe_device_mem_access_get(gt_to_xe(gt));
 	err = xe_force_wake_get(gt_to_fw(gt), XE_FW_GT);
 	if (err)
 		goto out;
@@ -526,8 +519,6 @@ int xe_gt_init_hwconfig(struct xe_gt *gt)
 out_fw:
 	xe_force_wake_put(gt_to_fw(gt), XE_FW_GT);
 out:
-	xe_device_mem_access_put(gt_to_xe(gt));
-
 	return err;
 }
 

drivers/gpu/drm/xe/xe_tile.c

@@ -160,24 +160,19 @@ int xe_tile_init_noalloc(struct xe_tile *tile)
 {
 	int err;
 
-	xe_device_mem_access_get(tile_to_xe(tile));
-
 	err = tile_ttm_mgr_init(tile);
 	if (err)
-		goto err_mem_access;
+		return err;
 
 	tile->mem.kernel_bb_pool = xe_sa_bo_manager_init(tile, SZ_1M, 16);
-	if (IS_ERR(tile->mem.kernel_bb_pool)) {
-		err = PTR_ERR(tile->mem.kernel_bb_pool);
-		goto err_mem_access;
-	}
+	if (IS_ERR(tile->mem.kernel_bb_pool))
+		return PTR_ERR(tile->mem.kernel_bb_pool);
+
 	xe_wa_apply_tile_workarounds(tile);
 
 	xe_tile_sysfs_init(tile);
 
-err_mem_access:
-	xe_device_mem_access_put(tile_to_xe(tile));
-	return err;
+	return 0;
 }
 
 void xe_tile_migrate_wait(struct xe_tile *tile)

drivers/gpu/drm/xe/xe_uc.c

@@ -32,11 +32,8 @@ uc_to_xe(struct xe_uc *uc)
 /* Should be called once at driver load only */
 int xe_uc_init(struct xe_uc *uc)
 {
-	struct xe_device *xe = uc_to_xe(uc);
 	int ret;
 
-	xe_device_mem_access_get(xe);
-
 	/*
 	 * We call the GuC/HuC/GSC init functions even if GuC submission is off
 	 * to correctly move our tracking of the FW state to "disabled".
@@ -65,16 +62,8 @@ int xe_uc_init(struct xe_uc *uc)
 		goto err;
 
 	ret = xe_guc_db_mgr_init(&uc->guc.dbm, ~0);
-	if (ret)
-		goto err;
-
-	xe_device_mem_access_put(xe);
-
-	return 0;
 
 err:
-	xe_device_mem_access_put(xe);
-
 	return ret;
 }