+
+/**
+ * vmw_context_scrub_shader - scrub a shader binding from a context.
+ *
+ * @bi: single binding information.
+ */
+static int vmw_context_scrub_shader(struct vmw_ctx_bindinfo *bi)
+{
+ struct vmw_private *dev_priv = bi->ctx->dev_priv;
+ struct {
+ SVGA3dCmdHeader header;
+ SVGA3dCmdSetShader body;
+ } *cmd;
+
+ cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
+ if (unlikely(cmd == NULL)) {
+ DRM_ERROR("Failed reserving FIFO space for shader "
+ "unbinding.\n");
+ return -ENOMEM;
+ }
+
+ cmd->header.id = SVGA_3D_CMD_SET_SHADER;
+ cmd->header.size = sizeof(cmd->body);
+ cmd->body.cid = bi->ctx->id;
+ cmd->body.type = bi->i1.shader_type;
+ cmd->body.shid = SVGA3D_INVALID_ID;
+ vmw_fifo_commit(dev_priv, sizeof(*cmd));
+
+ return 0;
+}
+
+/**
+ * vmw_context_scrub_render_target - scrub a render target binding
+ * from a context.
+ *
+ * @bi: single binding information.
+ */
+static int vmw_context_scrub_render_target(struct vmw_ctx_bindinfo *bi)
+{
+ struct vmw_private *dev_priv = bi->ctx->dev_priv;
+ struct {
+ SVGA3dCmdHeader header;
+ SVGA3dCmdSetRenderTarget body;
+ } *cmd;
+
+ cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
+ if (unlikely(cmd == NULL)) {
+ DRM_ERROR("Failed reserving FIFO space for render target "
+ "unbinding.\n");
+ return -ENOMEM;
+ }
+
+ cmd->header.id = SVGA_3D_CMD_SETRENDERTARGET;
+ cmd->header.size = sizeof(cmd->body);
+ cmd->body.cid = bi->ctx->id;
+ cmd->body.type = bi->i1.rt_type;
+ cmd->body.target.sid = SVGA3D_INVALID_ID;
+ cmd->body.target.face = 0;
+ cmd->body.target.mipmap = 0;
+ vmw_fifo_commit(dev_priv, sizeof(*cmd));
+
+ return 0;
+}
+
+/**
+ * vmw_context_scrub_texture - scrub a texture binding from a context.
+ *
+ * @bi: single binding information.
+ *
+ * TODO: Possibly complement this function with a function that takes
+ * a list of texture bindings and combines them to a single command.
+ */
+static int vmw_context_scrub_texture(struct vmw_ctx_bindinfo *bi)
+{
+ struct vmw_private *dev_priv = bi->ctx->dev_priv;
+ struct {
+ SVGA3dCmdHeader header;
+ struct {
+ SVGA3dCmdSetTextureState c;
+ SVGA3dTextureState s1;
+ } body;
+ } *cmd;
+
+ cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
+ if (unlikely(cmd == NULL)) {
+ DRM_ERROR("Failed reserving FIFO space for texture "
+ "unbinding.\n");
+ return -ENOMEM;
+ }
+
+
+ cmd->header.id = SVGA_3D_CMD_SETTEXTURESTATE;
+ cmd->header.size = sizeof(cmd->body);
+ cmd->body.c.cid = bi->ctx->id;
+ cmd->body.s1.stage = bi->i1.texture_stage;
+ cmd->body.s1.name = SVGA3D_TS_BIND_TEXTURE;
+ cmd->body.s1.value = (uint32) SVGA3D_INVALID_ID;
+ vmw_fifo_commit(dev_priv, sizeof(*cmd));
+
+ return 0;
+}
+
+/**
+ * vmw_context_binding_drop: Stop tracking a context binding
+ *
+ * @cb: Pointer to binding tracker storage.
+ *
+ * Stops tracking a context binding, and re-initializes its storage.
+ * Typically used when the context binding is replaced with a binding to
+ * another (or the same, for that matter) resource.
+ */
+static void vmw_context_binding_drop(struct vmw_ctx_binding *cb)
+{
+ list_del(&cb->ctx_list);
+ cb->bi.ctx = NULL;
+}
+
+/**
+ * vmw_context_binding_add: Start tracking a context binding
+ *
+ * @cbs: Pointer to the context binding state tracker.
+ * @bi: Information about the binding to track.
+ *
+ * Performs basic checks on the binding to make sure arguments are within
+ * bounds and then starts tracking the binding in the context binding
+ * state structure @cbs.
+ */
+int vmw_context_binding_add(struct vmw_ctx_binding_state *cbs,
+ const struct vmw_ctx_bindinfo *bi)
+{
+ struct vmw_ctx_binding *loc;
+
+ switch (bi->bt) {
+ case vmw_ctx_binding_rt:
+ if (unlikely((unsigned)bi->i1.rt_type >= SVGA3D_RT_MAX)) {
+ DRM_ERROR("Illegal render target type %u.\n",
+ (unsigned) bi->i1.rt_type);
+ return -EINVAL;
+ }
+ loc = &cbs->render_targets[bi->i1.rt_type];
+ break;
+ case vmw_ctx_binding_tex:
+ if (unlikely((unsigned)bi->i1.texture_stage >=
+ SVGA3D_NUM_TEXTURE_UNITS)) {
+ DRM_ERROR("Illegal texture/sampler unit %u.\n",
+ (unsigned) bi->i1.texture_stage);
+ return -EINVAL;
+ }
+ loc = &cbs->texture_units[bi->i1.texture_stage];
+ break;
+ case vmw_ctx_binding_shader:
+ if (unlikely((unsigned)bi->i1.shader_type >=
+ SVGA3D_SHADERTYPE_MAX)) {
+ DRM_ERROR("Illegal shader type %u.\n",
+ (unsigned) bi->i1.shader_type);
+ return -EINVAL;
+ }
+ loc = &cbs->shaders[bi->i1.shader_type];
+ break;
+ default:
+ BUG();
+ }
+
+ if (loc->bi.ctx != NULL)
+ vmw_context_binding_drop(loc);
+
+ loc->bi = *bi;
+ list_add_tail(&loc->ctx_list, &cbs->list);
+
+ return 0;
+}
+
+/**
+ * vmw_context_binding_kill - Kill a binding on the device
+ * and stop tracking it.
+ *
+ * @cb: Pointer to binding tracker storage.
+ *
+ * Emits FIFO commands to scrub a binding represented by @cb.
+ * Then stops tracking the binding and re-initializes its storage.
+ */
+void vmw_context_binding_kill(struct vmw_ctx_binding *cb)
+{
+ (void) vmw_scrub_funcs[cb->bi.bt](&cb->bi);
+ vmw_context_binding_drop(cb);
+}
+
+/**
+ * vmw_context_binding_state_kill - Kill all bindings associated with a
+ * struct vmw_ctx_binding state structure, and re-initialize the structure.
+ *
+ * @cbs: Pointer to the context binding state tracker.
+ *
+ * Emits commands to scrub all bindings associated with the
+ * context binding state tracker. Then re-initializes the whole structure.
+ */
+void vmw_context_binding_state_kill(struct vmw_ctx_binding_state *cbs)
+{
+ struct vmw_ctx_binding *entry, *next;
+
+ list_for_each_entry_safe(entry, next, &cbs->list, ctx_list) {
+ vmw_context_binding_kill(entry);
+ }
+}