drm/xe/uc: Use managed bo for HuC and GSC objects

Drmm actions are not the right ones to clean up BOs and we should use
devm instead. However, we can also instead just allocate the objects
using the managed_bo function, which will internally register the
correct cleanup call and therefore allows us to simplify the code.

While at it, switch to drmm_kzalloc for the GSC proxy allocation to
further simplify the cleanup.

Cc: John Harrison <John.C.Harrison@Intel.com>
Cc: Alan Previn <alan.previn.teres.alexis@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240815230541.3828206-1-lucas.demarchi@intel.comSigned-off-by: Lucas De Marchi <lucas.demarchi@intel.com>

drivers/gpu/drm/xe/xe_gsc.c

@@ -450,11 +450,6 @@ static void free_resources(struct drm_device *drm, void *arg)
 		xe_exec_queue_put(gsc->q);
 		gsc->q = NULL;
 	}
-
-	if (gsc->private) {
-		xe_bo_unpin_map_no_vm(gsc->private);
-		gsc->private = NULL;
-	}
 }
 
 int xe_gsc_init_post_hwconfig(struct xe_gsc *gsc)
@@ -474,10 +469,9 @@ int xe_gsc_init_post_hwconfig(struct xe_gsc *gsc)
 	if (!hwe)
 		return -ENODEV;
 
-	bo = xe_bo_create_pin_map(xe, tile, NULL, SZ_4M,
-				  ttm_bo_type_kernel,
-				  XE_BO_FLAG_STOLEN |
-				  XE_BO_FLAG_GGTT);
+	bo = xe_managed_bo_create_pin_map(xe, tile, SZ_4M,
+					  XE_BO_FLAG_STOLEN |
+					  XE_BO_FLAG_GGTT);
 	if (IS_ERR(bo))
 		return PTR_ERR(bo);
 

drivers/gpu/drm/xe/xe_gsc_proxy.c

@@ -371,27 +371,6 @@ static const struct component_ops xe_gsc_proxy_component_ops = {
 	.unbind = xe_gsc_proxy_component_unbind,
 };
 
-static void proxy_channel_free(struct drm_device *drm, void *arg)
-{
-	struct xe_gsc *gsc = arg;
-
-	if (!gsc->proxy.bo)
-		return;
-
-	if (gsc->proxy.to_csme) {
-		kfree(gsc->proxy.to_csme);
-		gsc->proxy.to_csme = NULL;
-		gsc->proxy.from_csme = NULL;
-	}
-
-	if (gsc->proxy.bo) {
-		iosys_map_clear(&gsc->proxy.to_gsc);
-		iosys_map_clear(&gsc->proxy.from_gsc);
-		xe_bo_unpin_map_no_vm(gsc->proxy.bo);
-		gsc->proxy.bo = NULL;
-	}
-}
-
 static int proxy_channel_alloc(struct xe_gsc *gsc)
 {
 	struct xe_gt *gt = gsc_to_gt(gsc);
@@ -400,18 +379,15 @@ static int proxy_channel_alloc(struct xe_gsc *gsc)
 	struct xe_bo *bo;
 	void *csme;
 
-	csme = kzalloc(GSC_PROXY_CHANNEL_SIZE, GFP_KERNEL);
+	csme = drmm_kzalloc(&xe->drm, GSC_PROXY_CHANNEL_SIZE, GFP_KERNEL);
 	if (!csme)
 		return -ENOMEM;
 
-	bo = xe_bo_create_pin_map(xe, tile, NULL, GSC_PROXY_CHANNEL_SIZE,
-				  ttm_bo_type_kernel,
-				  XE_BO_FLAG_SYSTEM |
-				  XE_BO_FLAG_GGTT);
-	if (IS_ERR(bo)) {
-		kfree(csme);
+	bo = xe_managed_bo_create_pin_map(xe, tile, GSC_PROXY_CHANNEL_SIZE,
+					  XE_BO_FLAG_SYSTEM |
+					  XE_BO_FLAG_GGTT);
+	if (IS_ERR(bo))
 		return PTR_ERR(bo);
-	}
 
 	gsc->proxy.bo = bo;
 	gsc->proxy.to_gsc = IOSYS_MAP_INIT_OFFSET(&bo->vmap, 0);
@@ -419,7 +395,7 @@ static int proxy_channel_alloc(struct xe_gsc *gsc)
 	gsc->proxy.to_csme = csme;
 	gsc->proxy.from_csme = csme + GSC_PROXY_BUFFER_SIZE;
 
-	return drmm_add_action_or_reset(&xe->drm, proxy_channel_free, gsc);
+	return 0;
 }
 
 /**

drivers/gpu/drm/xe/xe_huc.c

@@ -43,14 +43,6 @@ huc_to_guc(struct xe_huc *huc)
 	return &container_of(huc, struct xe_uc, huc)->guc;
 }
 
-static void free_gsc_pkt(struct drm_device *drm, void *arg)
-{
-	struct xe_huc *huc = arg;
-
-	xe_bo_unpin_map_no_vm(huc->gsc_pkt);
-	huc->gsc_pkt = NULL;
-}
-
 #define PXP43_HUC_AUTH_INOUT_SIZE SZ_4K
 static int huc_alloc_gsc_pkt(struct xe_huc *huc)
 {
@@ -59,17 +51,16 @@ static int huc_alloc_gsc_pkt(struct xe_huc *huc)
 	struct xe_bo *bo;
 
 	/* we use a single object for both input and output */
-	bo = xe_bo_create_pin_map(xe, gt_to_tile(gt), NULL,
-				  PXP43_HUC_AUTH_INOUT_SIZE * 2,
-				  ttm_bo_type_kernel,
-				  XE_BO_FLAG_SYSTEM |
-				  XE_BO_FLAG_GGTT);
+	bo = xe_managed_bo_create_pin_map(xe, gt_to_tile(gt),
+					  PXP43_HUC_AUTH_INOUT_SIZE * 2,
+					  XE_BO_FLAG_SYSTEM |
+					  XE_BO_FLAG_GGTT);
 	if (IS_ERR(bo))
 		return PTR_ERR(bo);
 
 	huc->gsc_pkt = bo;
 
-	return drmm_add_action_or_reset(&xe->drm, free_gsc_pkt, huc);
+	return 0;
 }
 
 int xe_huc_init(struct xe_huc *huc)