diff options
| -rw-r--r-- | drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c | 71 |
1 files changed, 58 insertions, 13 deletions
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c index d1f4a48..c7b53d9 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c @@ -35,17 +35,37 @@ #define VMW_RES_HT_ORDER 12 /** + * enum vmw_resource_relocation_type - Relocation type for resources + * + * @vmw_res_rel_normal: Traditional relocation. The resource id in the + * command stream is replaced with the actual id after validation. + * @vmw_res_rel_nop: NOP relocation. The command is unconditionally replaced + * with a NOP. + * @vmw_res_rel_cond_nop: Conditional NOP relocation. If the resource id + * after validation is -1, the command is replaced with a NOP. Otherwise no + * action. + */ +enum vmw_resource_relocation_type { + vmw_res_rel_normal, + vmw_res_rel_nop, + vmw_res_rel_cond_nop, + vmw_res_rel_max +}; + +/** * struct vmw_resource_relocation - Relocation info for resources * * @head: List head for the software context's relocation list. * @res: Non-ref-counted pointer to the resource. * @offset: Offset of single byte entries into the command buffer where the * id that needs fixup is located. + * @rel_type: Type of relocation. */ struct vmw_resource_relocation { struct list_head head; const struct vmw_resource *res; - unsigned long offset; + u32 offset:29; + enum vmw_resource_relocation_type rel_type:3; }; /** @@ -421,10 +441,13 @@ static int vmw_resource_context_res_add(struct vmw_private *dev_priv, * @res: The resource. * @offset: Offset into the command buffer currently being parsed where the * id that needs fixup is located. Granularity is one byte. + * @rel_type: Relocation type. */ static int vmw_resource_relocation_add(struct list_head *list, const struct vmw_resource *res, - unsigned long offset) + unsigned long offset, + enum vmw_resource_relocation_type + rel_type) { struct vmw_resource_relocation *rel; @@ -436,6 +459,7 @@ static int vmw_resource_relocation_add(struct list_head *list, rel->res = res; rel->offset = offset; + rel->rel_type = rel_type; list_add_tail(&rel->head, list); return 0; @@ -470,12 +494,24 @@ static void vmw_resource_relocations_apply(uint32_t *cb, { struct vmw_resource_relocation *rel; + /* Validate the struct vmw_resource_relocation member size */ + BUILD_BUG_ON(SVGA_CB_MAX_SIZE >= (1 << 29)); + BUILD_BUG_ON(vmw_res_rel_max >= (1 << 3)); + list_for_each_entry(rel, list, head) { u32 *addr = (u32 *)((unsigned long) cb + rel->offset); - if (likely(rel->res != NULL)) + switch (rel->rel_type) { + case vmw_res_rel_normal: *addr = rel->res->id; - else + break; + case vmw_res_rel_nop: *addr = SVGA_3D_CMD_NOP; + break; + default: + if (rel->res->id == -1) + *addr = SVGA_3D_CMD_NOP; + break; + } } } @@ -668,7 +704,8 @@ static int vmw_cmd_res_reloc_add(struct vmw_private *dev_priv, ret = vmw_resource_relocation_add(&sw_context->res_relocations, res, vmw_ptr_diff(sw_context->buf_start, - id_loc)); + id_loc), + vmw_res_rel_normal); if (unlikely(ret != 0)) return ret; @@ -734,7 +771,8 @@ vmw_cmd_res_check(struct vmw_private *dev_priv, return vmw_resource_relocation_add (&sw_context->res_relocations, res, - vmw_ptr_diff(sw_context->buf_start, id_loc)); + vmw_ptr_diff(sw_context->buf_start, id_loc), + vmw_res_rel_normal); } ret = vmw_user_resource_lookup_handle(dev_priv, @@ -2158,7 +2196,8 @@ static int vmw_cmd_shader_define(struct vmw_private *dev_priv, return vmw_resource_relocation_add(&sw_context->res_relocations, NULL, vmw_ptr_diff(sw_context->buf_start, - &cmd->header.id)); + &cmd->header.id), + vmw_res_rel_nop); } /** @@ -2202,7 +2241,8 @@ static int vmw_cmd_shader_destroy(struct vmw_private *dev_priv, return vmw_resource_relocation_add(&sw_context->res_relocations, NULL, vmw_ptr_diff(sw_context->buf_start, - &cmd->header.id)); + &cmd->header.id), + vmw_res_rel_nop); } /** @@ -2859,8 +2899,7 @@ static int vmw_cmd_dx_cid_check(struct vmw_private *dev_priv, * @header: Pointer to the command header in the command stream. * * Check that the view exists, and if it was not created using this - * command batch, make sure it's validated (present in the device) so that - * the remove command will not confuse the device. + * command batch, conditionally make this command a NOP. */ static int vmw_cmd_dx_view_remove(struct vmw_private *dev_priv, struct vmw_sw_context *sw_context, @@ -2888,10 +2927,16 @@ static int vmw_cmd_dx_view_remove(struct vmw_private *dev_priv, return ret; /* - * Add view to the validate list iff it was not created using this - * command batch. + * If the view wasn't created during this command batch, it might + * have been removed due to a context swapout, so add a + * relocation to conditionally make this command a NOP to avoid + * device errors. */ - return vmw_view_res_val_add(sw_context, view); + return vmw_resource_relocation_add(&sw_context->res_relocations, + view, + vmw_ptr_diff(sw_context->buf_start, + &cmd->header.id), + vmw_res_rel_cond_nop); } /** |
