/************************************************************************** * * Copyright © 2009 VMware, Inc., Palo Alto, CA., USA * All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sub license, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice (including the * next paragraph) shall be included in all copies or substantial portions * of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE * USE OR OTHER DEALINGS IN THE SOFTWARE. * **************************************************************************/ #include "vmwgfx_drv.h" #include "vmwgfx_reg.h" #include #include #define VMW_RES_HT_ORDER 12 /** * 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 4 byte entries into the command buffer where the * id that needs fixup is located. */ struct vmw_resource_relocation { struct list_head head; const struct vmw_resource *res; unsigned long offset; }; /** * struct vmw_resource_val_node - Validation info for resources * * @head: List head for the software context's resource list. * @hash: Hash entry for quick resouce to val_node lookup. * @res: Ref-counted pointer to the resource. * @switch_backup: Boolean whether to switch backup buffer on unreserve. * @new_backup: Refcounted pointer to the new backup buffer. * @new_backup_offset: New backup buffer offset if @new_backup is non-NUll. * @first_usage: Set to true the first time the resource is referenced in * the command stream. * @no_buffer_needed: Resources do not need to allocate buffer backup on * reservation. The command stream will provide one. */ struct vmw_resource_val_node { struct list_head head; struct drm_hash_item hash; struct vmw_resource *res; struct vmw_dma_buffer *new_backup; unsigned long new_backup_offset; bool first_usage; bool no_buffer_needed; }; /** * vmw_resource_unreserve - unreserve resources previously reserved for * command submission. * * @list_head: list of resources to unreserve. * @backoff: Whether command submission failed. */ static void vmw_resource_list_unreserve(struct list_head *list, bool backoff) { struct vmw_resource_val_node *val; list_for_each_entry(val, list, head) { struct vmw_resource *res = val->res; struct vmw_dma_buffer *new_backup = backoff ? NULL : val->new_backup; vmw_resource_unreserve(res, new_backup, val->new_backup_offset); vmw_dmabuf_unreference(&val->new_backup); } } /** * vmw_resource_val_add - Add a resource to the software context's * resource list if it's not already on it. * * @sw_context: Pointer to the software context. * @res: Pointer to the resource. * @p_node On successful return points to a valid pointer to a * struct vmw_resource_val_node, if non-NULL on entry. */ static int vmw_resource_val_add(struct vmw_sw_context *sw_context, struct vmw_resource *res, struct vmw_resource_val_node **p_node) { struct vmw_resource_val_node *node; struct drm_hash_item *hash; int ret; if (likely(drm_ht_find_item(&sw_context->res_ht, (unsigned long) res, &hash) == 0)) { node = container_of(hash, struct vmw_resource_val_node, hash); node->first_usage = false; if (unlikely(p_node != NULL)) *p_node = node; return 0; } node = kzalloc(sizeof(*node), GFP_KERNEL); if (unlikely(node == NULL)) { DRM_ERROR("Failed to allocate a resource validation " "entry.\n"); return -ENOMEM; } node->hash.key = (unsigned long) res; ret = drm_ht_insert_item(&sw_context->res_ht, &node->hash); if (unlikely(ret != 0)) { DRM_ERROR("Failed to initialize a resource validation " "entry.\n"); kfree(node); return ret; } list_add_tail(&node->head, &sw_context->resource_list); node->res = vmw_resource_reference(res); node->first_usage = true; if (unlikely(p_node != NULL)) *p_node = node; return 0; } /** * vmw_resource_relocation_add - Add a relocation to the relocation list * * @list: Pointer to head of relocation list. * @res: The resource. * @offset: Offset into the command buffer currently being parsed where the * id that needs fixup is located. Granularity is 4 bytes. */ static int vmw_resource_relocation_add(struct list_head *list, const struct vmw_resource *res, unsigned long offset) { struct vmw_resource_relocation *rel; rel = kmalloc(sizeof(*rel), GFP_KERNEL); if (unlikely(rel == NULL)) { DRM_ERROR("Failed to allocate a resource relocation.\n"); return -ENOMEM; } rel->res = res; rel->offset = offset; list_add_tail(&rel->head, list); return 0; } /** * vmw_resource_relocations_free - Free all relocations on a list * * @list: Pointer to the head of the relocation list. */ static void vmw_resource_relocations_free(struct list_head *list) { struct vmw_resource_relocation *rel, *n; list_for_each_entry_safe(rel, n, list, head) { list_del(&rel->head); kfree(rel); } } /** * vmw_resource_relocations_apply - Apply all relocations on a list * * @cb: Pointer to the start of the command buffer bein patch. This need * not be the same buffer as the one being parsed when the relocation * list was built, but the contents must be the same modulo the * resource ids. * @list: Pointer to the head of the relocation list. */ static void vmw_resource_relocations_apply(uint32_t *cb, struct list_head *list) { struct vmw_resource_relocation *rel; list_for_each_entry(rel, list, head) cb[rel->offset] = rel->res->id; } static int vmw_cmd_invalid(struct vmw_private *dev_priv, struct vmw_sw_context *sw_context, SVGA3dCmdHeader *header) { return capable(CAP_SYS_ADMIN) ? : -EINVAL; } static int vmw_cmd_ok(struct vmw_private *dev_priv, struct vmw_sw_context *sw_context, SVGA3dCmdHeader *header) { return 0; } /** * vmw_bo_to_validate_list - add a bo to a validate list * * @sw_context: The software context used for this command submission batch. * @bo: The buffer object to add. * @p_val_node: If non-NULL Will be updated with the validate node number * on return. * * Returns -EINVAL if the limit of number of buffer objects per command * submission is reached. */ static int vmw_bo_to_validate_list(struct vmw_sw_context *sw_context, struct ttm_buffer_object *bo, uint32_t *p_val_node) { uint32_t val_node; struct vmw_validate_buffer *vval_buf; struct ttm_validate_buffer *val_buf; struct drm_hash_item *hash; int ret; if (likely(drm_ht_find_item(&sw_context->res_ht, (unsigned long) bo, &hash) == 0)) { vval_buf = container_of(hash, struct vmw_validate_buffer, hash); val_buf = &vval_buf->base; val_node = vval_buf - sw_context->val_bufs; } else { val_node = sw_context->cur_val_buf; if (unlikely(val_node >= VMWGFX_MAX_VALIDATIONS)) { DRM_ERROR("Max number of DMA buffers per submission " "exceeded.\n"); return -EINVAL; } vval_buf = &sw_context->val_bufs[val_node]; vval_buf->hash.key = (unsigned long) bo; ret = drm_ht_insert_item(&sw_context->res_ht, &vval_buf->hash); if (unlikely(ret != 0)) { DRM_ERROR("Failed to initialize a buffer validation " "entry.\n"); return ret; } ++sw_context->cur_val_buf; val_buf = &vval_buf->base; val_buf->bo = ttm_bo_reference(bo); val_buf->reserved = false; list_add_tail(&val_buf->head, &sw_context->validate_nodes); } sw_context->fence_flags |= DRM_VMW_FENCE_FLAG_EXEC; if (p_val_node) *p_val_node = val_node; return 0; } /** * vmw_resources_reserve - Reserve all resources on the sw_context's * resource list. * * @sw_context: Pointer to the software context. * * Note that since vmware's command submission currently is protected by * the cmdbuf mutex, no fancy deadlock avoidance is required for resources, * since only a single thread at once will attempt this. */ static int vmw_resources_reserve(struct vmw_sw_context *sw_context) { struct vmw_resource_val_node *val; int ret; list_for_each_entry(val, &sw_context->resource_list, head) { struct vmw_resource *res = val->res; ret = vmw_resource_reserve(res, val->no_buffer_needed); if (unlikely(ret != 0)) return ret; if (res->backup) { struct ttm_buffer_object *bo = &res->backup->base; ret = vmw_bo_to_validate_list (sw_context, bo, NULL); if (unlikely(ret != 0)) return ret; } } return 0; } /** * vmw_resources_validate - Validate all resources on the sw_context's * resource list. * * @sw_context: Pointer to the software context. * * Before this function is called, all resource backup buffers must have * been validated. */ static int vmw_resources_validate(struct vmw_sw_context *sw_context) { struct vmw_resource_val_node *val; int ret; list_for_each_entry(val, &sw_context->resource_list, head) { struct vmw_resource *res = val->res; ret = vmw_resource_validate(res); if (unlikely(ret != 0)) { if (ret != -ERESTARTSYS) DRM_ERROR("Failed to validate resource.\n"); return ret; } } return 0; } /** * vmw_cmd_res_check - Check that a resource is present and if so, put it * on the resource validate list unless it's already there. * * @dev_priv: Pointer to a device private structure. * @sw_context: Pointer to the software context. * @res_type: Resource type. * @converter: User-space visisble type specific information. * @id: Pointer to the location in the command buffer currently being * parsed from where the user-space resource id handle is located. */ static int vmw_cmd_res_check(struct vmw_private *dev_priv, struct vmw_sw_context *sw_context, enum vmw_res_type res_type, const struct vmw_user_resource_conv *converter, uint32_t *id, struct vmw_resource_val_node **p_val) { struct vmw_res_cache_entry *rcache = &sw_context->res_cache[res_type]; struct vmw_resource *res; struct vmw_resource_val_node *node; int ret; if (*id == SVGA3D_INVALID_ID) return 0; /* * Fastpath in case of repeated commands referencing the same * resource */ if (likely(rcache->valid && *id == rcache->handle)) { const struct vmw_resource *res = rcache->res; rcache->node->first_usage = false; if (p_val) *p_val = rcache->node; return vmw_resource_relocation_add (&sw_context->res_relocations, res, id - sw_context->buf_start); } ret = vmw_user_resource_lookup_handle(dev_priv, sw_context->tfile, *id, converter, &res); if (unlikely(ret != 0)) { DRM_ERROR("Could not find or use resource 0x%08x.\n", (unsigned) *id); dump_stack(); return ret; } rcache->valid = true; rcache->res = res; rcache->handle = *id; ret = vmw_resource_relocation_add(&sw_context->res_relocations, res, id - sw_context->buf_start); if (unlikely(ret != 0)) goto out_no_reloc; ret = vmw_resource_val_add(sw_context, res, &node); if (unlikely(ret != 0)) goto out_no_reloc; rcache->node = node; if (p_val) *p_val = node; vmw_resource_unreference(&res); return 0; out_no_reloc: BUG_ON(sw_context->error_resource != NULL); sw_context->error_resource = res; return ret; } /** * vmw_cmd_cid_check - Check a command header for valid context information. * * @dev_priv: Pointer to a device private structure. * @sw_context: Pointer to the software context. * @header: A command header with an embedded user-space context handle. * * Convenience function: Call vmw_cmd_res_check with the user-space context * handle embedded in @header. */ static int vmw_cmd_cid_check(struct vmw_private *dev_priv, struct vmw_sw_context *sw_context, SVGA3dCmdHeader *header) { struct vmw_cid_cmd { SVGA3dCmdHeader header; __le32 cid; } *cmd; cmd = container_of(header, struct vmw_cid_cmd, header); return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_context, user_context_converter, &cmd->cid, NULL); } static int vmw_cmd_set_render_target_check(struct vmw_private *dev_priv, struct vmw_sw_context *sw_context, SVGA3dCmdHeader *header) { struct vmw_sid_cmd { SVGA3dCmdHeader header; SVGA3dCmdSetRenderTarget body; } *cmd; int ret; ret = vmw_cmd_cid_check(dev_priv, sw_context, header); if (unlikely(ret != 0)) return ret; cmd = container_of(header, struct vmw_sid_cmd, header); ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface, user_surface_converter, &cmd->body.target.sid, NULL); return ret; } static int vmw_cmd_surface_copy_check(struct vmw_private *dev_priv, struct vmw_sw_context *sw_context, SVGA3dCmdHeader *header) { struct vmw_sid_cmd { SVGA3dCmdHeader header; SVGA3dCmdSurfaceCopy body; } *cmd; int ret; cmd = container_of(header, struct vmw_sid_cmd, header); ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface, user_surface_converter, &cmd->body.src.sid, NULL); if (unlikely(ret != 0)) return ret; return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface, user_surface_converter, &cmd->body.dest.sid, NULL); } static int vmw_cmd_stretch_blt_check(struct vmw_private *dev_priv, struct vmw_sw_context *sw_context, SVGA3dCmdHeader *header) { struct vmw_sid_cmd { SVGA3dCmdHeader header; SVGA3dCmdSurfaceStretchBlt body; } *cmd; int ret; cmd = container_of(header, struct vmw_sid_cmd, header); ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface, user_surface_converter, &cmd->body.src.sid, NULL); if (unlikely(ret != 0)) return ret; return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface, user_surface_converter, &cmd->body.dest.sid, NULL); } static int vmw_cmd_blt_surf_screen_check(struct vmw_private *dev_priv, struct vmw_sw_context *sw_context, SVGA3dCmdHeader *header) { struct vmw_sid_cmd { SVGA3dCmdHeader header; SVGA3dCmdBlitSurfaceToScreen body; } *cmd; cmd = container_of(header, struct vmw_sid_cmd, header); if (unlikely(!sw_context->kernel)) { DRM_ERROR("Kernel only SVGA3d command: %u.\n", cmd->header.id); return -EPERM; } return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface, user_surface_converter, &cmd->body.srcImage.sid, NULL); } static int vmw_cmd_present_check(struct vmw_private *dev_priv, struct vmw_sw_context *sw_context, SVGA3dCmdHeader *header) { struct vmw_sid_cmd { SVGA3dCmdHeader header; SVGA3dCmdPresent body; } *cmd; cmd = container_of(header, struct vmw_sid_cmd, header); if (unlikely(!sw_context->kernel)) { DRM_ERROR("Kernel only SVGA3d command: %u.\n", cmd->header.id); return -EPERM; } return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface, user_surface_converter, &cmd->body.sid, NULL); } /** * vmw_query_bo_switch_prepare - Prepare to switch pinned buffer for queries. * * @dev_priv: The device private structure. * @new_query_bo: The new buffer holding query results. * @sw_context: The software context used for this command submission. * * This function checks whether @new_query_bo is suitable for holding * query results, and if another buffer currently is pinned for query * results. If so, the function prepares the state of @sw_context for * switching pinned buffers after successful submission of the current * command batch. */ static int vmw_query_bo_switch_prepare(struct vmw_private *dev_priv, struct ttm_buffer_object *new_query_bo, struct vmw_sw_context *sw_context) { struct vmw_res_cache_entry *ctx_entry = &sw_context->res_cache[vmw_res_context]; int ret; BUG_ON(!ctx_entry->valid); sw_context->last_query_ctx = ctx_entry->res; if (unlikely(new_query_bo != sw_context->cur_query_bo)) { if (unlikely(new_query_bo->num_pages > 4)) { DRM_ERROR("Query buffer too large.\n"); return -EINVAL; } if (unlikely(sw_context->cur_query_bo != NULL)) { sw_context->needs_post_query_barrier = true; ret = vmw_bo_to_validate_list(sw_context, sw_context->cur_query_bo, NULL); if (unlikely(ret != 0)) return ret; } sw_context->cur_query_bo = new_query_bo; ret = vmw_bo_to_validate_list(sw_context, dev_priv->dummy_query_bo, NULL); if (unlikely(ret != 0)) return ret; } return 0; } /** * vmw_query_bo_switch_commit - Finalize switching pinned query buffer * * @dev_priv: The device private structure. * @sw_context: The software context used for this command submission batch. * * This function will check if we're switching query buffers, and will then, * issue a dummy occlusion query wait used as a query barrier. When the fence * object following that query wait has signaled, we are sure that all * preceding queries have finished, and the old query buffer can be unpinned. * However, since both the new query buffer and the old one are fenced with * that fence, we can do an asynchronus unpin now, and be sure that the * old query buffer won't be moved until the fence has signaled. * * As mentioned above, both the new - and old query buffers need to be fenced * using a sequence emitted *after* calling this function. */ static void vmw_query_bo_switch_commit(struct vmw_private *dev_priv, struct vmw_sw_context *sw_context) { /* * The validate list should still hold references to all * contexts here. */ if (sw_context->needs_post_query_barrier) { struct vmw_res_cache_entry *ctx_entry = &sw_context->res_cache[vmw_res_context]; struct vmw_resource *ctx; int ret; BUG_ON(!ctx_entry->valid); ctx = ctx_entry->res; ret = vmw_fifo_emit_dummy_query(dev_priv, ctx->id); if (unlikely(ret != 0)) DRM_ERROR("Out of fifo space for dummy query.\n"); } if (dev_priv->pinned_bo != sw_context->cur_query_bo) { if (dev_priv->pinned_bo) { vmw_bo_pin(dev_priv->pinned_bo, false); ttm_bo_unref(&dev_priv->pinned_bo); } if (!sw_context->needs_post_query_barrier) { vmw_bo_pin(sw_context->cur_query_bo, true); /* * We pin also the dummy_query_bo buffer so that we * don't need to validate it when emitting * dummy queries in context destroy paths. */ vmw_bo_pin(dev_priv->dummy_query_bo, true); dev_priv->dummy_query_bo_pinned = true; BUG_ON(sw_context->last_query_ctx == NULL); dev_priv->query_cid = sw_context->last_query_ctx->id; dev_priv->query_cid_valid = true; dev_priv->pinned_bo = ttm_bo_reference(sw_context->cur_query_bo); } } } /** * vmw_translate_guest_pointer - Prepare to translate a user-space buffer * handle to a valid SVGAGuestPtr * * @dev_priv: Pointer to a device private structure. * @sw_context: The software context used for this command batch validation. * @ptr: Pointer to the user-space handle to be translated. * @vmw_bo_p: Points to a location that, on successful return will carry * a reference-counted pointer to the DMA buffer identified by the * user-space handle in @id. * * This function saves information needed to translate a user-space buffer * handle to a valid SVGAGuestPtr. The translation does not take place * immediately, but during a call to vmw_apply_relocations(). * This function builds a relocation list and a list of buffers to validate. * The former needs to be freed using either vmw_apply_relocations() or * vmw_free_relocations(). The latter needs to be freed using * vmw_clear_validations. */ static int vmw_translate_guest_ptr(struct vmw_private *dev_priv, struct vmw_sw_context *sw_context, SVGAGuestPtr *ptr, struct vmw_dma_buffer **vmw_bo_p) { struct vmw_dma_buffer *vmw_bo = NULL; struct ttm_buffer_object *bo; uint32_t handle = ptr->gmrId; struct vmw_relocation *reloc; int ret; ret = vmw_user_dmabuf_lookup(sw_context->tfile, handle, &vmw_bo); if (unlikely(ret != 0)) { DRM_ERROR("Could not find or use GMR region.\n"); return -EINVAL; } bo = &vmw_bo->base; if (unlikely(sw_context->cur_reloc >= VMWGFX_MAX_RELOCATIONS)) { DRM_ERROR("Max number relocations per submission" " exceeded\n"); ret = -EINVAL; goto out_no_reloc; } reloc = &sw_context->relocs[sw_context->cur_reloc++]; reloc->location = ptr; ret = vmw_bo_to_validate_list(sw_context, bo, &reloc->index); if (unlikely(ret != 0)) goto out_no_reloc; *vmw_bo_p = vmw_bo; return 0; out_no_reloc: vmw_dmabuf_unreference(&vmw_bo); vmw_bo_p = NULL; return ret; } /** * vmw_cmd_begin_query - validate a SVGA_3D_CMD_BEGIN_QUERY command. * * @dev_priv: Pointer to a device private struct. * @sw_context: The software context used for this command submission. * @header: Pointer to the command header in the command stream. */ static int vmw_cmd_begin_query(struct vmw_private *dev_priv, struct vmw_sw_context *sw_context, SVGA3dCmdHeader *header) { struct vmw_begin_query_cmd { SVGA3dCmdHeader header; SVGA3dCmdBeginQuery q; } *cmd; cmd = container_of(header, struct vmw_begin_query_cmd, header); return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_context, user_context_converter, &cmd->q.cid, NULL); } /** * vmw_cmd_end_query - validate a SVGA_3D_CMD_END_QUERY command. * * @dev_priv: Pointer to a device private struct. * @sw_context: The software context used for this command submission. * @header: Pointer to the command header in the command stream. */ static int vmw_cmd_end_query(struct vmw_private *dev_priv, struct vmw_sw_context *sw_context, SVGA3dCmdHeader *header) { struct vmw_dma_buffer *vmw_bo; struct vmw_query_cmd { SVGA3dCmdHeader header; SVGA3dCmdEndQuery q; } *cmd; int ret; cmd = container_of(header, struct vmw_query_cmd, header); ret = vmw_cmd_cid_check(dev_priv, sw_context, header); if (unlikely(ret != 0)) return ret; ret = vmw_translate_guest_ptr(dev_priv, sw_context, &cmd->q.guestResult, &vmw_bo); if (unlikely(ret != 0)) return ret; ret = vmw_query_bo_switch_prepare(dev_priv, &vmw_bo->base, sw_context); vmw_dmabuf_unreference(&vmw_bo); return ret; } /* * vmw_cmd_wait_query - validate a SVGA_3D_CMD_WAIT_QUERY command. * * @dev_priv: Pointer to a device private struct. * @sw_context: The software context used for this command submission. * @header: Pointer to the command header in the command stream. */ static int vmw_cmd_wait_query(struct vmw_private *dev_priv, struct vmw_sw_context *sw_context, SVGA3dCmdHeader *header) { struct vmw_dma_buffer *vmw_bo; struct vmw_query_cmd { SVGA3dCmdHeader header; SVGA3dCmdWaitForQuery q; } *cmd; int ret; cmd = container_of(header, struct vmw_query_cmd, header); ret = vmw_cmd_cid_check(dev_priv, sw_context, header); if (unlikely(ret != 0)) return ret; ret = vmw_translate_guest_ptr(dev_priv, sw_context, &cmd->q.guestResult, &vmw_bo); if (unlikely(ret != 0)) return ret; vmw_dmabuf_unreference(&vmw_bo); return 0; } static int vmw_cmd_dma(struct vmw_private *dev_priv, struct vmw_sw_context *sw_context, SVGA3dCmdHeader *header) { struct vmw_dma_buffer *vmw_bo = NULL; struct vmw_surface *srf = NULL; struct vmw_dma_cmd { SVGA3dCmdHeader header; SVGA3dCmdSurfaceDMA dma; } *cmd; int ret; cmd = container_of(header, struct vmw_dma_cmd, header); ret = vmw_translate_guest_ptr(dev_priv, sw_context, &cmd->dma.guest.ptr, &vmw_bo); if (unlikely(ret != 0)) return ret; ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface, user_surface_converter, &cmd->dma.host.sid, NULL); if (unlikely(ret != 0)) { if (unlikely(ret != -ERESTARTSYS)) DRM_ERROR("could not find surface for DMA.\n"); goto out_no_surface; } srf = vmw_res_to_srf(sw_context->res_cache[vmw_res_surface].res); vmw_kms_cursor_snoop(srf, sw_context->tfile, &vmw_bo->base, header); out_no_surface: vmw_dmabuf_unreference(&vmw_bo); return ret; } static int vmw_cmd_draw(struct vmw_private *dev_priv, struct vmw_sw_context *sw_context, SVGA3dCmdHeader *header) { struct vmw_draw_cmd { SVGA3dCmdHeader header; SVGA3dCmdDrawPrimitives body; } *cmd; SVGA3dVertexDecl *decl = (SVGA3dVertexDecl *)( (unsigned long)header + sizeof(*cmd)); SVGA3dPrimitiveRange *range; uint32_t i; uint32_t maxnum; int ret; ret = vmw_cmd_cid_check(dev_priv, sw_context, header); if (unlikely(ret != 0)) return ret; cmd = container_of(header, struct vmw_draw_cmd, header); maxnum = (header->size - sizeof(cmd->body)) / sizeof(*decl); if (unlikely(cmd->body.numVertexDecls > maxnum)) { DRM_ERROR("Illegal number of vertex declarations.\n"); return -EINVAL; } for (i = 0; i < cmd->body.numVertexDecls; ++i, ++decl) { ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface, user_surface_converter, &decl->array.surfaceId, NULL); if (unlikely(ret != 0)) return ret; } maxnum = (header->size - sizeof(cmd->body) - cmd->body.numVertexDecls * sizeof(*decl)) / sizeof(*range); if (unlikely(cmd->body.numRanges > maxnum)) { DRM_ERROR("Illegal number of index ranges.\n"); return -EINVAL; } range = (SVGA3dPrimitiveRange *) decl; for (i = 0; i < cmd->body.numRanges; ++i, ++range) { ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface, user_surface_converter, &range->indexArray.surfaceId, NULL); if (unlikely(ret != 0)) return ret; } return 0; } static int vmw_cmd_tex_state(struct vmw_private *dev_priv, struct vmw_sw_context *sw_context, SVGA3dCmdHeader *header) { struct vmw_tex_state_cmd { SVGA3dCmdHeader header; SVGA3dCmdSetTextureState state; }; SVGA3dTextureState *last_state = (SVGA3dTextureState *) ((unsigned long) header + header->size + sizeof(header)); SVGA3dTextureState *cur_state = (SVGA3dTextureState *) ((unsigned long) header + sizeof(struct vmw_tex_state_cmd)); int ret; ret = vmw_cmd_cid_check(dev_priv, sw_context, header); if (unlikely(ret != 0)) return ret; for (; cur_state < last_state; ++cur_state) { if (likely(cur_state->name != SVGA3D_TS_BIND_TEXTURE)) continue; ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface, user_surface_converter, &cur_state->value, NULL); if (unlikely(ret != 0)) return ret; } return 0; } static int vmw_cmd_check_define_gmrfb(struct vmw_private *dev_priv, struct vmw_sw_context *sw_context, void *buf) { struct vmw_dma_buffer *vmw_bo; int ret; struct { uint32_t header; SVGAFifoCmdDefineGMRFB body; } *cmd = buf; ret = vmw_translate_guest_ptr(dev_priv, sw_context, &cmd->body.ptr, &vmw_bo); if (unlikely(ret != 0)) return ret; vmw_dmabuf_unreference(&vmw_bo); return ret; } /** * vmw_cmd_set_shader - Validate an SVGA_3D_CMD_SET_SHADER * command * * @dev_priv: Pointer to a device private struct. * @sw_context: The software context being used for this batch. * @header: Pointer to the command header in the command stream. */ static int vmw_cmd_set_shader(struct vmw_private *dev_priv, struct vmw_sw_context *sw_context, SVGA3dCmdHeader *header) { struct vmw_set_shader_cmd { SVGA3dCmdHeader header; SVGA3dCmdSetShader body; } *cmd; int ret; cmd = container_of(header, struct vmw_set_shader_cmd, header); ret = vmw_cmd_cid_check(dev_priv, sw_context, header); if (unlikely(ret != 0)) return ret; return 0; } static int vmw_cmd_check_not_3d(struct vmw_private *dev_priv, struct vmw_sw_context *sw_context, void *buf, uint32_t *size) { uint32_t size_remaining = *size; uint32_t cmd_id; cmd_id = le32_to_cpu(((uint32_t *)buf)[0]); switch (cmd_id) { case SVGA_CMD_UPDATE: *size = sizeof(uint32_t) + sizeof(SVGAFifoCmdUpdate); break; case SVGA_CMD_DEFINE_GMRFB: *size = sizeof(uint32_t) + sizeof(SVGAFifoCmdDefineGMRFB); break; case SVGA_CMD_BLIT_GMRFB_TO_SCREEN: *size = sizeof(uint32_t) + sizeof(SVGAFifoCmdBlitGMRFBToScreen); break; case SVGA_CMD_BLIT_SCREEN_TO_GMRFB: *size = sizeof(uint32_t) + sizeof(SVGAFifoCmdBlitGMRFBToScreen); break; default: DRM_ERROR("Unsupported SVGA command: %u.\n", cmd_id); return -EINVAL; } if (*size > size_remaining) { DRM_ERROR("Invalid SVGA command (size mismatch):" " %u.\n", cmd_id); return -EINVAL; } if (unlikely(!sw_context->kernel)) { DRM_ERROR("Kernel only SVGA command: %u.\n", cmd_id); return -EPERM; } if (cmd_id == SVGA_CMD_DEFINE_GMRFB) return vmw_cmd_check_define_gmrfb(dev_priv, sw_context, buf); return 0; } typedef int (*vmw_cmd_func) (struct vmw_private *, struct vmw_sw_context *, SVGA3dCmdHeader *); #define VMW_CMD_DEF(cmd, func) \ [cmd - SVGA_3D_CMD_BASE] = func static vmw_cmd_func vmw_cmd_funcs[SVGA_3D_CMD_MAX] = { VMW_CMD_DEF(SVGA_3D_CMD_SURFACE_DEFINE, &vmw_cmd_invalid), VMW_CMD_DEF(SVGA_3D_CMD_SURFACE_DESTROY, &vmw_cmd_invalid), VMW_CMD_DEF(SVGA_3D_CMD_SURFACE_COPY, &vmw_cmd_surface_copy_check), VMW_CMD_DEF(SVGA_3D_CMD_SURFACE_STRETCHBLT, &vmw_cmd_stretch_blt_check), VMW_CMD_DEF(SVGA_3D_CMD_SURFACE_DMA, &vmw_cmd_dma), VMW_CMD_DEF(SVGA_3D_CMD_CONTEXT_DEFINE, &vmw_cmd_invalid), VMW_CMD_DEF(SVGA_3D_CMD_CONTEXT_DESTROY, &vmw_cmd_invalid), VMW_CMD_DEF(SVGA_3D_CMD_SETTRANSFORM, &vmw_cmd_cid_check), VMW_CMD_DEF(SVGA_3D_CMD_SETZRANGE, &vmw_cmd_cid_check), VMW_CMD_DEF(SVGA_3D_CMD_SETRENDERSTATE, &vmw_cmd_cid_check), VMW_CMD_DEF(SVGA_3D_CMD_SETRENDERTARGET, &vmw_cmd_set_render_target_check), VMW_CMD_DEF(SVGA_3D_CMD_SETTEXTURESTATE, &vmw_cmd_tex_state), VMW_CMD_DEF(SVGA_3D_CMD_SETMATERIAL, &vmw_cmd_cid_check), VMW_CMD_DEF(SVGA_3D_CMD_SETLIGHTDATA, &vmw_cmd_cid_check), VMW_CMD_DEF(SVGA_3D_CMD_SETLIGHTENABLED, &vmw_cmd_cid_check), VMW_CMD_DEF(SVGA_3D_CMD_SETVIEWPORT, &vmw_cmd_cid_check), VMW_CMD_DEF(SVGA_3D_CMD_SETCLIPPLANE, &vmw_cmd_cid_check), VMW_CMD_DEF(SVGA_3D_CMD_CLEAR, &vmw_cmd_cid_check), VMW_CMD_DEF(SVGA_3D_CMD_PRESENT, &vmw_cmd_present_check), VMW_CMD_DEF(SVGA_3D_CMD_SHADER_DEFINE, &vmw_cmd_cid_check), VMW_CMD_DEF(SVGA_3D_CMD_SHADER_DESTROY, &vmw_cmd_cid_check), VMW_CMD_DEF(SVGA_3D_CMD_SET_SHADER, &vmw_cmd_set_shader), VMW_CMD_DEF(SVGA_3D_CMD_SET_SHADER_CONST, &vmw_cmd_cid_check), VMW_CMD_DEF(SVGA_3D_CMD_DRAW_PRIMITIVES, &vmw_cmd_draw), VMW_CMD_DEF(SVGA_3D_CMD_SETSCISSORRECT, &vmw_cmd_cid_check), VMW_CMD_DEF(SVGA_3D_CMD_BEGIN_QUERY, &vmw_cmd_begin_query), VMW_CMD_DEF(SVGA_3D_CMD_END_QUERY, &vmw_cmd_end_query), VMW_CMD_DEF(SVGA_3D_CMD_WAIT_FOR_QUERY, &vmw_cmd_wait_query), VMW_CMD_DEF(SVGA_3D_CMD_PRESENT_READBACK, &vmw_cmd_ok), VMW_CMD_DEF(SVGA_3D_CMD_BLIT_SURFACE_TO_SCREEN, &vmw_cmd_blt_surf_screen_check), VMW_CMD_DEF(SVGA_3D_CMD_SURFACE_DEFINE_V2, &vmw_cmd_invalid), VMW_CMD_DEF(SVGA_3D_CMD_GENERATE_MIPMAPS, &vmw_cmd_invalid), VMW_CMD_DEF(SVGA_3D_CMD_ACTIVATE_SURFACE, &vmw_cmd_invalid), VMW_CMD_DEF(SVGA_3D_CMD_DEACTIVATE_SURFACE, &vmw_cmd_invalid), }; static int vmw_cmd_check(struct vmw_private *dev_priv, struct vmw_sw_context *sw_context, void *buf, uint32_t *size) { uint32_t cmd_id; uint32_t size_remaining = *size; SVGA3dCmdHeader *header = (SVGA3dCmdHeader *) buf; int ret; cmd_id = le32_to_cpu(((uint32_t *)buf)[0]); /* Handle any none 3D commands */ if (unlikely(cmd_id < SVGA_CMD_MAX)) return vmw_cmd_check_not_3d(dev_priv, sw_context, buf, size); cmd_id = le32_to_cpu(header->id); *size = le32_to_cpu(header->size) + sizeof(SVGA3dCmdHeader); cmd_id -= SVGA_3D_CMD_BASE; if (unlikely(*size > size_remaining)) goto out_err; if (unlikely(cmd_id >= SVGA_3D_CMD_MAX - SVGA_3D_CMD_BASE)) goto out_err; ret = vmw_cmd_funcs[cmd_id](dev_priv, sw_context, header); if (unlikely(ret != 0)) goto out_err; return 0; out_err: DRM_ERROR("Illegal / Invalid SVGA3D command: %d\n", cmd_id + SVGA_3D_CMD_BASE); return -EINVAL; } static int vmw_cmd_check_all(struct vmw_private *dev_priv, struct vmw_sw_context *sw_context, void *buf, uint32_t size) { int32_t cur_size = size; int ret; sw_context->buf_start = buf; while (cur_size > 0) { size = cur_size; ret = vmw_cmd_check(dev_priv, sw_context, buf, &size); if (unlikely(ret != 0)) return ret; buf = (void *)((unsigned long) buf + size); cur_size -= size; } if (unlikely(cur_size != 0)) { DRM_ERROR("Command verifier out of sync.\n"); return -EINVAL; } return 0; } static void vmw_free_relocations(struct vmw_sw_context *sw_context) { sw_context->cur_reloc = 0; } static void vmw_apply_relocations(struct vmw_sw_context *sw_context) { uint32_t i; struct vmw_relocation *reloc; struct ttm_validate_buffer *validate; struct ttm_buffer_object *bo; for (i = 0; i < sw_context->cur_reloc; ++i) { reloc = &sw_context->relocs[i]; validate = &sw_context->val_bufs[reloc->index].base; bo = validate->bo; switch (bo->mem.mem_type) { case TTM_PL_VRAM: reloc->location->offset += bo->offset; reloc->location->gmrId = SVGA_GMR_FRAMEBUFFER; break; case VMW_PL_GMR: reloc->location->gmrId = bo->mem.start; break; default: BUG(); } } vmw_free_relocations(sw_context); } /** * vmw_resource_list_unrefererence - Free up a resource list and unreference * all resources referenced by it. * * @list: The resource list. */ static void vmw_resource_list_unreference(struct list_head *list) { struct vmw_resource_val_node *val, *val_next; /* * Drop references to resources held during command submission. */ list_for_each_entry_safe(val, val_next, list, head) { list_del_init(&val->head); vmw_resource_unreference(&val->res); kfree(val); } } static void vmw_clear_validations(struct vmw_sw_context *sw_context) { struct vmw_validate_buffer *entry, *next; struct vmw_resource_val_node *val; /* * Drop references to DMA buffers held during command submission. */ list_for_each_entry_safe(entry, next, &sw_context->validate_nodes, base.head) { list_del(&entry->base.head); ttm_bo_unref(&entry->base.bo); (void) drm_ht_remove_item(&sw_context->res_ht, &entry->hash); sw_context->cur_val_buf--; } BUG_ON(sw_context->cur_val_buf != 0); list_for_each_entry(val, &sw_context->resource_list, head) (void) drm_ht_remove_item(&sw_context->res_ht, &val->hash); } static int vmw_validate_single_buffer(struct vmw_private *dev_priv, struct ttm_buffer_object *bo) { int ret; /* * Don't validate pinned buffers. */ if (bo == dev_priv->pinned_bo || (bo == dev_priv->dummy_query_bo && dev_priv->dummy_query_bo_pinned)) return 0; /** * Put BO in VRAM if there is space, otherwise as a GMR. * If there is no space in VRAM and GMR ids are all used up, * start evicting GMRs to make room. If the DMA buffer can't be * used as a GMR, this will return -ENOMEM. */ ret = ttm_bo_validate(bo, &vmw_vram_gmr_placement, true, false); if (likely(ret == 0 || ret == -ERESTARTSYS)) return ret; /** * If that failed, try VRAM again, this time evicting * previous contents. */ DRM_INFO("Falling through to VRAM.\n"); ret = ttm_bo_validate(bo, &vmw_vram_placement, true, false); return ret; } static int vmw_validate_buffers(struct vmw_private *dev_priv, struct vmw_sw_context *sw_context) { struct vmw_validate_buffer *entry; int ret; list_for_each_entry(entry, &sw_context->validate_nodes, base.head) { ret = vmw_validate_single_buffer(dev_priv, entry->base.bo); if (unlikely(ret != 0)) return ret; } return 0; } static int vmw_resize_cmd_bounce(struct vmw_sw_context *sw_context, uint32_t size) { if (likely(sw_context->cmd_bounce_size >= size)) return 0; if (sw_context->cmd_bounce_size == 0) sw_context->cmd_bounce_size = VMWGFX_CMD_BOUNCE_INIT_SIZE; while (sw_context->cmd_bounce_size < size) { sw_context->cmd_bounce_size = PAGE_ALIGN(sw_context->cmd_bounce_size + (sw_context->cmd_bounce_size >> 1)); } if (sw_context->cmd_bounce != NULL) vfree(sw_context->cmd_bounce); sw_context->cmd_bounce = vmalloc(sw_context->cmd_bounce_size); if (sw_context->cmd_bounce == NULL) { DRM_ERROR("Failed to allocate command bounce buffer.\n"); sw_context->cmd_bounce_size = 0; return -ENOMEM; } return 0; } /** * vmw_execbuf_fence_commands - create and submit a command stream fence * * Creates a fence object and submits a command stream marker. * If this fails for some reason, We sync the fifo and return NULL. * It is then safe to fence buffers with a NULL pointer. * * If @p_handle is not NULL @file_priv must also not be NULL. Creates * a userspace handle if @p_handle is not NULL, otherwise not. */ int vmw_execbuf_fence_commands(struct drm_file *file_priv, struct vmw_private *dev_priv, struct vmw_fence_obj **p_fence, uint32_t *p_handle) { uint32_t sequence; int ret; bool synced = false; /* p_handle implies file_priv. */ BUG_ON(p_handle != NULL && file_priv == NULL); ret = vmw_fifo_send_fence(dev_priv, &sequence); if (unlikely(ret != 0)) { DRM_ERROR("Fence submission error. Syncing.\n"); synced = true; } if (p_handle != NULL) ret = vmw_user_fence_create(file_priv, dev_priv->fman, sequence, DRM_VMW_FENCE_FLAG_EXEC, p_fence, p_handle); else ret = vmw_fence_create(dev_priv->fman, sequence, DRM_VMW_FENCE_FLAG_EXEC, p_fence); if (unlikely(ret != 0 && !synced)) { (void) vmw_fallback_wait(dev_priv, false, false, sequence, false, VMW_FENCE_WAIT_TIMEOUT); *p_fence = NULL; } return 0; } /** * vmw_execbuf_copy_fence_user - copy fence object information to * user-space. * * @dev_priv: Pointer to a vmw_private struct. * @vmw_fp: Pointer to the struct vmw_fpriv representing the calling file. * @ret: Return value from fence object creation. * @user_fence_rep: User space address of a struct drm_vmw_fence_rep to * which the information should be copied. * @fence: Pointer to the fenc object. * @fence_handle: User-space fence handle. * * This function copies fence information to user-space. If copying fails, * The user-space struct drm_vmw_fence_rep::error member is hopefully * left untouched, and if it's preloaded with an -EFAULT by user-space, * the error will hopefully be detected. * Also if copying fails, user-space will be unable to signal the fence * object so we wait for it immediately, and then unreference the * user-space reference. */ void vmw_execbuf_copy_fence_user(struct vmw_private *dev_priv, struct vmw_fpriv *vmw_fp, int ret, struct drm_vmw_fence_rep __user *user_fence_rep, struct vmw_fence_obj *fence, uint32_t fence_handle) { struct drm_vmw_fence_rep fence_rep; if (user_fence_rep == NULL) return; memset(&fence_rep, 0, sizeof(fence_rep)); fence_rep.error = ret; if (ret == 0) { BUG_ON(fence == NULL); fence_rep.handle = fence_handle; fence_rep.seqno = fence->seqno; vmw_update_seqno(dev_priv, &dev_priv->fifo); fence_rep.passed_seqno = dev_priv->last_read_seqno; } /* * copy_to_user errors will be detected by user space not * seeing fence_rep::error filled in. Typically * user-space would have pre-set that member to -EFAULT. */ ret = copy_to_user(user_fence_rep, &fence_rep, sizeof(fence_rep)); /* * User-space lost the fence object. We need to sync * and unreference the handle. */ if (unlikely(ret != 0) && (fence_rep.error == 0)) { ttm_ref_object_base_unref(vmw_fp->tfile, fence_handle, TTM_REF_USAGE); DRM_ERROR("Fence copy error. Syncing.\n"); (void) vmw_fence_obj_wait(fence, fence->signal_mask, false, false, VMW_FENCE_WAIT_TIMEOUT); } } int vmw_execbuf_process(struct drm_file *file_priv, struct vmw_private *dev_priv, void __user *user_commands, void *kernel_commands, uint32_t command_size, uint64_t throttle_us, struct drm_vmw_fence_rep __user *user_fence_rep, struct vmw_fence_obj **out_fence) { struct vmw_sw_context *sw_context = &dev_priv->ctx; struct vmw_fence_obj *fence = NULL; struct vmw_resource *error_resource; struct list_head resource_list; struct ww_acquire_ctx ticket; uint32_t handle; void *cmd; int ret; ret = mutex_lock_interruptible(&dev_priv->cmdbuf_mutex); if (unlikely(ret != 0)) return -ERESTARTSYS; if (kernel_commands == NULL) { sw_context->kernel = false; ret = vmw_resize_cmd_bounce(sw_context, command_size); if (unlikely(ret != 0)) goto out_unlock; ret = copy_from_user(sw_context->cmd_bounce, user_commands, command_size); if (unlikely(ret != 0)) { ret = -EFAULT; DRM_ERROR("Failed copying commands.\n"); goto out_unlock; } kernel_commands = sw_context->cmd_bounce; } else sw_context->kernel = true; sw_context->tfile = vmw_fpriv(file_priv)->tfile; sw_context->cur_reloc = 0; sw_context->cur_val_buf = 0; sw_context->fence_flags = 0; INIT_LIST_HEAD(&sw_context->resource_list); sw_context->cur_query_bo = dev_priv->pinned_bo; sw_context->last_query_ctx = NULL; sw_context->needs_post_query_barrier = false; memset(sw_context->res_cache, 0, sizeof(sw_context->res_cache)); INIT_LIST_HEAD(&sw_context->validate_nodes); INIT_LIST_HEAD(&sw_context->res_relocations); if (!sw_context->res_ht_initialized) { ret = drm_ht_create(&sw_context->res_ht, VMW_RES_HT_ORDER); if (unlikely(ret != 0)) goto out_unlock; sw_context->res_ht_initialized = true; } INIT_LIST_HEAD(&resource_list); ret = vmw_cmd_check_all(dev_priv, sw_context, kernel_commands, command_size); if (unlikely(ret != 0)) goto out_err; ret = vmw_resources_reserve(sw_context); if (unlikely(ret != 0)) goto out_err; ret = ttm_eu_reserve_buffers(&ticket, &sw_context->validate_nodes); if (unlikely(ret != 0)) goto out_err; ret = vmw_validate_buffers(dev_priv, sw_context); if (unlikely(ret != 0)) goto out_err; ret = vmw_resources_validate(sw_context); if (unlikely(ret != 0)) goto out_err; if (throttle_us) { ret = vmw_wait_lag(dev_priv, &dev_priv->fifo.marker_queue, throttle_us); if (unlikely(ret != 0)) goto out_err; } cmd = vmw_fifo_reserve(dev_priv, command_size); if (unlikely(cmd == NULL)) { DRM_ERROR("Failed reserving fifo space for commands.\n"); ret = -ENOMEM; goto out_err; } vmw_apply_relocations(sw_context); memcpy(cmd, kernel_commands, command_size); vmw_resource_relocations_apply(cmd, &sw_context->res_relocations); vmw_resource_relocations_free(&sw_context->res_relocations); vmw_fifo_commit(dev_priv, command_size); vmw_query_bo_switch_commit(dev_priv, sw_context); ret = vmw_execbuf_fence_commands(file_priv, dev_priv, &fence, (user_fence_rep) ? &handle : NULL); /* * This error is harmless, because if fence submission fails, * vmw_fifo_send_fence will sync. The error will be propagated to * user-space in @fence_rep */ if (ret != 0) DRM_ERROR("Fence submission error. Syncing.\n"); vmw_resource_list_unreserve(&sw_context->resource_list, false); ttm_eu_fence_buffer_objects(&ticket, &sw_context->validate_nodes, (void *) fence); if (unlikely(dev_priv->pinned_bo != NULL && !dev_priv->query_cid_valid)) __vmw_execbuf_release_pinned_bo(dev_priv, fence); vmw_clear_validations(sw_context); vmw_execbuf_copy_fence_user(dev_priv, vmw_fpriv(file_priv), ret, user_fence_rep, fence, handle); /* Don't unreference when handing fence out */ if (unlikely(out_fence != NULL)) { *out_fence = fence; fence = NULL; } else if (likely(fence != NULL)) { vmw_fence_obj_unreference(&fence); } list_splice_init(&sw_context->resource_list, &resource_list); mutex_unlock(&dev_priv->cmdbuf_mutex); /* * Unreference resources outside of the cmdbuf_mutex to * avoid deadlocks in resource destruction paths. */ vmw_resource_list_unreference(&resource_list); return 0; out_err: vmw_resource_relocations_free(&sw_context->res_relocations); vmw_free_relocations(sw_context); ttm_eu_backoff_reservation(&ticket, &sw_context->validate_nodes); vmw_resource_list_unreserve(&sw_context->resource_list, true); vmw_clear_validations(sw_context); if (unlikely(dev_priv->pinned_bo != NULL && !dev_priv->query_cid_valid)) __vmw_execbuf_release_pinned_bo(dev_priv, NULL); out_unlock: list_splice_init(&sw_context->resource_list, &resource_list); error_resource = sw_context->error_resource; sw_context->error_resource = NULL; mutex_unlock(&dev_priv->cmdbuf_mutex); /* * Unreference resources outside of the cmdbuf_mutex to * avoid deadlocks in resource destruction paths. */ vmw_resource_list_unreference(&resource_list); if (unlikely(error_resource != NULL)) vmw_resource_unreference(&error_resource); return ret; } /** * vmw_execbuf_unpin_panic - Idle the fifo and unpin the query buffer. * * @dev_priv: The device private structure. * * This function is called to idle the fifo and unpin the query buffer * if the normal way to do this hits an error, which should typically be * extremely rare. */ static void vmw_execbuf_unpin_panic(struct vmw_private *dev_priv) { DRM_ERROR("Can't unpin query buffer. Trying to recover.\n"); (void) vmw_fallback_wait(dev_priv, false, true, 0, false, 10*HZ); vmw_bo_pin(dev_priv->pinned_bo, false); vmw_bo_pin(dev_priv->dummy_query_bo, false); dev_priv->dummy_query_bo_pinned = false; } /** * __vmw_execbuf_release_pinned_bo - Flush queries and unpin the pinned * query bo. * * @dev_priv: The device private structure. * @fence: If non-NULL should point to a struct vmw_fence_obj issued * _after_ a query barrier that flushes all queries touching the current * buffer pointed to by @dev_priv->pinned_bo * * This function should be used to unpin the pinned query bo, or * as a query barrier when we need to make sure that all queries have * finished before the next fifo command. (For example on hardware * context destructions where the hardware may otherwise leak unfinished * queries). * * This function does not return any failure codes, but make attempts * to do safe unpinning in case of errors. * * The function will synchronize on the previous query barrier, and will * thus not finish until that barrier has executed. * * the @dev_priv->cmdbuf_mutex needs to be held by the current thread * before calling this function. */ void __vmw_execbuf_release_pinned_bo(struct vmw_private *dev_priv, struct vmw_fence_obj *fence) { int ret = 0; struct list_head validate_list; struct ttm_validate_buffer pinned_val, query_val; struct vmw_fence_obj *lfence = NULL; struct ww_acquire_ctx ticket; if (dev_priv->pinned_bo == NULL) goto out_unlock; INIT_LIST_HEAD(&validate_list); pinned_val.bo = ttm_bo_reference(dev_priv->pinned_bo); list_add_tail(&pinned_val.head, &validate_list); query_val.bo = ttm_bo_reference(dev_priv->dummy_query_bo); list_add_tail(&query_val.head, &validate_list); do { ret = ttm_eu_reserve_buffers(&ticket, &validate_list); } while (ret == -ERESTARTSYS); if (unlikely(ret != 0)) { vmw_execbuf_unpin_panic(dev_priv); goto out_no_reserve; } if (dev_priv->query_cid_valid) { BUG_ON(fence != NULL); ret = vmw_fifo_emit_dummy_query(dev_priv, dev_priv->query_cid); if (unlikely(ret != 0)) { vmw_execbuf_unpin_panic(dev_priv); goto out_no_emit; } dev_priv->query_cid_valid = false; } vmw_bo_pin(dev_priv->pinned_bo, false); vmw_bo_pin(dev_priv->dummy_query_bo, false); dev_priv->dummy_query_bo_pinned = false; if (fence == NULL) { (void) vmw_execbuf_fence_commands(NULL, dev_priv, &lfence, NULL); fence = lfence; } ttm_eu_fence_buffer_objects(&ticket, &validate_list, (void *) fence); if (lfence != NULL) vmw_fence_obj_unreference(&lfence); ttm_bo_unref(&query_val.bo); ttm_bo_unref(&pinned_val.bo); ttm_bo_unref(&dev_priv->pinned_bo); out_unlock: return; out_no_emit: ttm_eu_backoff_reservation(&ticket, &validate_list); out_no_reserve: ttm_bo_unref(&query_val.bo); ttm_bo_unref(&pinned_val.bo); ttm_bo_unref(&dev_priv->pinned_bo); } /** * vmw_execbuf_release_pinned_bo - Flush queries and unpin the pinned * query bo. * * @dev_priv: The device private structure. * * This function should be used to unpin the pinned query bo, or * as a query barrier when we need to make sure that all queries have * finished before the next fifo command. (For example on hardware * context destructions where the hardware may otherwise leak unfinished * queries). * * This function does not return any failure codes, but make attempts * to do safe unpinning in case of errors. * * The function will synchronize on the previous query barrier, and will * thus not finish until that barrier has executed. */ void vmw_execbuf_release_pinned_bo(struct vmw_private *dev_priv) { mutex_lock(&dev_priv->cmdbuf_mutex); if (dev_priv->query_cid_valid) __vmw_execbuf_release_pinned_bo(dev_priv, NULL); mutex_unlock(&dev_priv->cmdbuf_mutex); } int vmw_execbuf_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct vmw_private *dev_priv = vmw_priv(dev); struct drm_vmw_execbuf_arg *arg = (struct drm_vmw_execbuf_arg *)data; struct vmw_master *vmaster = vmw_master(file_priv->master); int ret; /* * This will allow us to extend the ioctl argument while * maintaining backwards compatibility: * We take different code paths depending on the value of * arg->version. */ if (unlikely(arg->version != DRM_VMW_EXECBUF_VERSION)) { DRM_ERROR("Incorrect execbuf version.\n"); DRM_ERROR("You're running outdated experimental " "vmwgfx user-space drivers."); return -EINVAL; } ret = ttm_read_lock(&vmaster->lock, true); if (unlikely(ret != 0)) return ret; ret = vmw_execbuf_process(file_priv, dev_priv, (void __user *)(unsigned long)arg->commands, NULL, arg->command_size, arg->throttle_us, (void __user *)(unsigned long)arg->fence_rep, NULL); if (unlikely(ret != 0)) goto out_unlock; vmw_kms_cursor_post_execbuf(dev_priv); out_unlock: ttm_read_unlock(&vmaster->lock); return ret; }