drm/vmwgfx: Fix queries if no dma buffer thrashing is occuring.

Intercept query commands and apply relocations to their guest pointers.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
index d69caf92ffe78bfc4060f7daf99c10d60af5e6b7..0897359b3e4e27550dbe2d767e2ca3a50be49c14 100644 (file)
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
@@ -182,25 +182,19 @@ static int vmw_cmd_present_check(struct vmw_private *dev_priv,
        return vmw_cmd_sid_check(dev_priv, sw_context, &cmd->body.sid);
 }
 
-static int vmw_cmd_dma(struct vmw_private *dev_priv,
-                      struct vmw_sw_context *sw_context,
-                      SVGA3dCmdHeader *header)
+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)
 {
-       uint32_t handle;
        struct vmw_dma_buffer *vmw_bo = NULL;
        struct ttm_buffer_object *bo;
-       struct vmw_surface *srf = NULL;
-       struct vmw_dma_cmd {
-               SVGA3dCmdHeader header;
-               SVGA3dCmdSurfaceDMA dma;
-       } *cmd;
+       uint32_t handle = ptr->gmrId;
        struct vmw_relocation *reloc;
-       int ret;
        uint32_t cur_validate_node;
        struct ttm_validate_buffer *val_buf;
+       int ret;
 
-       cmd = container_of(header, struct vmw_dma_cmd, header);
-       handle = cmd->dma.guest.ptr.gmrId;
        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");
@@ -209,14 +203,14 @@ static int vmw_cmd_dma(struct vmw_private *dev_priv,
        bo = &vmw_bo->base;
 
        if (unlikely(sw_context->cur_reloc >= VMWGFX_MAX_RELOCATIONS)) {
-               DRM_ERROR("Max number of DMA commands per submission"
+               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 = &cmd->dma.guest.ptr;
+       reloc->location = ptr;
 
        cur_validate_node = vmw_dmabuf_validate_node(bo, sw_context->cur_val_buf);
        if (unlikely(cur_validate_node >= VMWGFX_MAX_GMRS)) {
@@ -234,7 +228,89 @@ static int vmw_cmd_dma(struct vmw_private *dev_priv,
                list_add_tail(&val_buf->head, &sw_context->validate_nodes);
                ++sw_context->cur_val_buf;
        }
+       *vmw_bo_p = vmw_bo;
+       return 0;
+
+out_no_reloc:
+       vmw_dmabuf_unreference(&vmw_bo);
+       vmw_bo_p = NULL;
+       return ret;
+}
+
+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;
+
+       vmw_dmabuf_unreference(&vmw_bo);
+       return 0;
+}
 
+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 ttm_buffer_object *bo;
+       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;
+
+       bo = &vmw_bo->base;
        ret = vmw_user_surface_lookup_handle(dev_priv, sw_context->tfile,
                                             cmd->dma.host.sid, &srf);
        if (ret) {
@@ -379,8 +455,8 @@ static vmw_cmd_func vmw_cmd_funcs[SVGA_3D_CMD_MAX] = {
        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_cid_check),
-       VMW_CMD_DEF(SVGA_3D_CMD_END_QUERY, &vmw_cmd_cid_check),
-       VMW_CMD_DEF(SVGA_3D_CMD_WAIT_FOR_QUERY, &vmw_cmd_cid_check),
+       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)