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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/drivers/gpu/drm/vmwgfx/vmwgfx_cmdbuf.c
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@@ -25,6 +25,9 @@
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  *
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  **************************************************************************/
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+#include <linux/dmapool.h>
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+#include <linux/pci.h>
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+
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 #include <drm/ttm/ttm_bo_api.h>
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 #include "vmwgfx_drv.h"
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@@ -393,6 +396,7 @@
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 			__vmw_cmdbuf_header_free(entry);
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 			break;
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 		case SVGA_CB_STATUS_COMMAND_ERROR:
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+			WARN_ONCE(true, "Command buffer error.\n");
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 			entry->cb_header->status = SVGA_CB_STATUS_NONE;
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 			list_add_tail(&entry->list, &man->error);
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 			schedule_work(&man->work);
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@@ -533,19 +537,20 @@
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 		global_block = true;
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 		if (!vmw_cmd_describe(header, &error_cmd_size, &cmd_name)) {
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-			DRM_ERROR("Unknown command causing device error.\n");
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-			DRM_ERROR("Command buffer offset is %lu\n",
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-				  (unsigned long) cb_hdr->errorOffset);
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+			VMW_DEBUG_USER("Unknown command causing device error.\n");
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+			VMW_DEBUG_USER("Command buffer offset is %lu\n",
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+				       (unsigned long) cb_hdr->errorOffset);
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 			__vmw_cmdbuf_header_free(entry);
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 			send_fence = true;
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 			continue;
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 		}
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-		DRM_ERROR("Command \"%s\" causing device error.\n", cmd_name);
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-		DRM_ERROR("Command buffer offset is %lu\n",
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-			  (unsigned long) cb_hdr->errorOffset);
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-		DRM_ERROR("Command size is %lu\n",
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-			  (unsigned long) error_cmd_size);
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+		VMW_DEBUG_USER("Command \"%s\" causing device error.\n",
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+			       cmd_name);
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+		VMW_DEBUG_USER("Command buffer offset is %lu\n",
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+			       (unsigned long) cb_hdr->errorOffset);
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+		VMW_DEBUG_USER("Command size is %lu\n",
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+			       (unsigned long) error_cmd_size);
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 		new_start_offset = cb_hdr->errorOffset + error_cmd_size;
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@@ -656,7 +661,7 @@
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 {
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 	struct vmw_cmdbuf_header *cur = man->cur;
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-	WARN_ON(!mutex_is_locked(&man->cur_mutex));
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+	lockdep_assert_held_once(&man->cur_mutex);
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 	if (!cur)
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 		return;
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@@ -761,7 +766,7 @@
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 	if (info->done)
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 		return true;
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- 
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+
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 	memset(info->node, 0, sizeof(*info->node));
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 	spin_lock(&man->lock);
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 	ret = drm_mm_insert_node(&man->mm, info->node, info->page_size);
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@@ -1041,7 +1046,7 @@
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 {
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 	struct vmw_cmdbuf_header *cur = man->cur;
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-	WARN_ON(!mutex_is_locked(&man->cur_mutex));
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+	lockdep_assert_held_once(&man->cur_mutex);
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 	WARN_ON(size > cur->reserved);
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 	man->cur_pos += size;
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@@ -1236,7 +1241,8 @@
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 		 * actually call into the already enabled manager, when
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 		 * binding the MOB.
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 		 */
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-		if (!(dev_priv->capabilities & SVGA_CAP_DX))
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+		if (!(dev_priv->capabilities & SVGA_CAP_DX) ||
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+		    !dev_priv->has_mob)
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 			return -ENOMEM;
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 		ret = ttm_bo_create(&dev_priv->bdev, size, ttm_bo_type_device,
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@@ -1272,8 +1278,10 @@
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 	return 0;
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 out_no_map:
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-	if (man->using_mob)
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-		ttm_bo_unref(&man->cmd_space);
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+	if (man->using_mob) {
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+		ttm_bo_put(man->cmd_space);
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+		man->cmd_space = NULL;
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+	}
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 	return ret;
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 }
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@@ -1376,7 +1384,8 @@
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 	(void) vmw_cmdbuf_idle(man, false, 10*HZ);
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 	if (man->using_mob) {
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 		(void) ttm_bo_kunmap(&man->map_obj);
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-		ttm_bo_unref(&man->cmd_space);
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+		ttm_bo_put(man->cmd_space);
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+		man->cmd_space = NULL;
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 	} else {
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 		dma_free_coherent(&man->dev_priv->dev->pdev->dev,
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 				  man->size, man->map, man->handle);