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 // SPDX-License-Identifier: GPL-2.0 OR MIT
 /**************************************************************************
  *
  * Copyright 2015 VMware, Inc., Palo Alto, CA., USA
  *
  * 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.
  *
  **************************************************************************/
 /*
  * This file implements the vmwgfx context binding manager,
  * The sole reason for having to use this code is that vmware guest
  * backed contexts can be swapped out to their backing mobs by the device
  * at any time, also swapped in at any time. At swapin time, the device
  * validates the context bindings to make sure they point to valid resources.
  * It's this outside-of-drawcall validation (that can happen at any time),
  * that makes this code necessary.
  *
  * We therefore need to kill any context bindings pointing to a resource
  * when the resource is swapped out. Furthermore, if the vmwgfx driver has
  * swapped out the context we can't swap it in again to kill bindings because
  * of backing mob reservation lockdep violations, so as part of
  * context swapout, also kill all bindings of a context, so that they are
  * already killed if a resource to which a binding points
  * needs to be swapped out.
  *
  * Note that a resource can be pointed to by bindings from multiple contexts,
  * Therefore we can't easily protect this data by a per context mutex
  * (unless we use deadlock-safe WW mutexes). So we use a global binding_mutex
  * to protect all binding manager data.
  *
  * Finally, any association between a context and a global resource
  * (surface, shader or even DX query) is conceptually a context binding that
  * needs to be tracked by this code.
  */
 
 #include "vmwgfx_drv.h"
 #include "vmwgfx_binding.h"
 #include "device_include/svga3d_reg.h"
 
 #define VMW_BINDING_RT_BIT     0
 #define VMW_BINDING_PS_BIT     1
 #define VMW_BINDING_SO_T_BIT   2
 #define VMW_BINDING_VB_BIT     3
 #define VMW_BINDING_UAV_BIT    4
 #define VMW_BINDING_CS_UAV_BIT 5
 #define VMW_BINDING_NUM_BITS   6
 
 #define VMW_BINDING_PS_SR_BIT  0
 
 /**
  * struct vmw_ctx_binding_state - per context binding state
  *
  * @dev_priv: Pointer to device private structure.
  * @list: linked list of individual active bindings.
  * @render_targets: Render target bindings.
  * @texture_units: Texture units bindings.
  * @ds_view: Depth-stencil view binding.
  * @so_targets: StreamOutput target bindings.
  * @vertex_buffers: Vertex buffer bindings.
  * @index_buffer: Index buffer binding.
  * @per_shader: Per shader-type bindings.
  * @ua_views: UAV bindings.
  * @so_state: StreamOutput bindings.
  * @dirty: Bitmap tracking per binding-type changes that have not yet
  * been emitted to the device.
  * @dirty_vb: Bitmap tracking individual vertex buffer binding changes that
  * have not yet been emitted to the device.
  * @bind_cmd_buffer: Scratch space used to construct binding commands.
  * @bind_cmd_count: Number of binding command data entries in @bind_cmd_buffer
  * @bind_first_slot: Used together with @bind_cmd_buffer to indicate the
  * device binding slot of the first command data entry in @bind_cmd_buffer.
  *
  * Note that this structure also provides storage space for the individual
  * struct vmw_ctx_binding objects, so that no dynamic allocation is needed
  * for individual bindings.
  *
  */
 struct vmw_ctx_binding_state {
     struct vmw_private *dev_priv;
     struct list_head list;
     struct vmw_ctx_bindinfo_view render_targets[SVGA3D_RT_MAX];
     struct vmw_ctx_bindinfo_tex texture_units[SVGA3D_NUM_TEXTURE_UNITS];
     struct vmw_ctx_bindinfo_view ds_view;
     struct vmw_ctx_bindinfo_so_target so_targets[SVGA3D_DX_MAX_SOTARGETS];
     struct vmw_ctx_bindinfo_vb vertex_buffers[SVGA3D_DX_MAX_VERTEXBUFFERS];
     struct vmw_ctx_bindinfo_ib index_buffer;
     struct vmw_dx_shader_bindings per_shader[SVGA3D_NUM_SHADERTYPE];
     struct vmw_ctx_bindinfo_uav ua_views[VMW_MAX_UAV_BIND_TYPE];
     struct vmw_ctx_bindinfo_so so_state;
 
     unsigned long dirty;
     DECLARE_BITMAP(dirty_vb, SVGA3D_DX_MAX_VERTEXBUFFERS);
 
     u32 bind_cmd_buffer[VMW_MAX_VIEW_BINDINGS];
     u32 bind_cmd_count;
     u32 bind_first_slot;
 };
 
 static int vmw_binding_scrub_shader(struct vmw_ctx_bindinfo *bi, bool rebind);
 static int vmw_binding_scrub_render_target(struct vmw_ctx_bindinfo *bi,
                        bool rebind);
 static int vmw_binding_scrub_texture(struct vmw_ctx_bindinfo *bi, bool rebind);
 static int vmw_binding_scrub_cb(struct vmw_ctx_bindinfo *bi, bool rebind);
 static int vmw_binding_scrub_dx_rt(struct vmw_ctx_bindinfo *bi, bool rebind);
 static int vmw_binding_scrub_sr(struct vmw_ctx_bindinfo *bi, bool rebind);
 static int vmw_binding_scrub_so_target(struct vmw_ctx_bindinfo *bi, bool rebind);
 static int vmw_binding_emit_dirty(struct vmw_ctx_binding_state *cbs);
 static int vmw_binding_scrub_dx_shader(struct vmw_ctx_bindinfo *bi,
                        bool rebind);
 static int vmw_binding_scrub_ib(struct vmw_ctx_bindinfo *bi, bool rebind);
 static int vmw_binding_scrub_vb(struct vmw_ctx_bindinfo *bi, bool rebind);
 static int vmw_binding_scrub_uav(struct vmw_ctx_bindinfo *bi, bool rebind);
 static int vmw_binding_scrub_cs_uav(struct vmw_ctx_bindinfo *bi, bool rebind);
 static int vmw_binding_scrub_so(struct vmw_ctx_bindinfo *bi, bool rebind);
 
 static void vmw_binding_build_asserts(void) __attribute__ ((unused));
 
 typedef int (*vmw_scrub_func)(struct vmw_ctx_bindinfo *, bool);
 
 /**
  * struct vmw_binding_info - Per binding type information for the binding
  * manager
  *
  * @size: The size of the struct binding derived from a struct vmw_ctx_bindinfo.
  * @offsets: array[shader_slot] of offsets to the array[slot]
  * of struct bindings for the binding type.
  * @scrub_func: Pointer to the scrub function for this binding type.
  *
  * Holds static information to help optimize the binding manager and avoid
  * an excessive amount of switch statements.
  */
 struct vmw_binding_info {
     size_t size;
     const size_t *offsets;
     vmw_scrub_func scrub_func;
 };
 
 /*
  * A number of static variables that help determine the scrub func and the
  * location of the struct vmw_ctx_bindinfo slots for each binding type.
  */
 static const size_t vmw_binding_shader_offsets[] = {
     offsetof(struct vmw_ctx_binding_state, per_shader[0].shader),
     offsetof(struct vmw_ctx_binding_state, per_shader[1].shader),
     offsetof(struct vmw_ctx_binding_state, per_shader[2].shader),
     offsetof(struct vmw_ctx_binding_state, per_shader[3].shader),
     offsetof(struct vmw_ctx_binding_state, per_shader[4].shader),
     offsetof(struct vmw_ctx_binding_state, per_shader[5].shader),
 };
 static const size_t vmw_binding_rt_offsets[] = {
     offsetof(struct vmw_ctx_binding_state, render_targets),
 };
 static const size_t vmw_binding_tex_offsets[] = {
     offsetof(struct vmw_ctx_binding_state, texture_units),
 };
 static const size_t vmw_binding_cb_offsets[] = {
     offsetof(struct vmw_ctx_binding_state, per_shader[0].const_buffers),
     offsetof(struct vmw_ctx_binding_state, per_shader[1].const_buffers),
     offsetof(struct vmw_ctx_binding_state, per_shader[2].const_buffers),
     offsetof(struct vmw_ctx_binding_state, per_shader[3].const_buffers),
     offsetof(struct vmw_ctx_binding_state, per_shader[4].const_buffers),
     offsetof(struct vmw_ctx_binding_state, per_shader[5].const_buffers),
 };
 static const size_t vmw_binding_dx_ds_offsets[] = {
     offsetof(struct vmw_ctx_binding_state, ds_view),
 };
 static const size_t vmw_binding_sr_offsets[] = {
     offsetof(struct vmw_ctx_binding_state, per_shader[0].shader_res),
     offsetof(struct vmw_ctx_binding_state, per_shader[1].shader_res),
     offsetof(struct vmw_ctx_binding_state, per_shader[2].shader_res),
     offsetof(struct vmw_ctx_binding_state, per_shader[3].shader_res),
     offsetof(struct vmw_ctx_binding_state, per_shader[4].shader_res),
     offsetof(struct vmw_ctx_binding_state, per_shader[5].shader_res),
 };
 static const size_t vmw_binding_so_target_offsets[] = {
     offsetof(struct vmw_ctx_binding_state, so_targets),
 };
 static const size_t vmw_binding_vb_offsets[] = {
     offsetof(struct vmw_ctx_binding_state, vertex_buffers),
 };
 static const size_t vmw_binding_ib_offsets[] = {
     offsetof(struct vmw_ctx_binding_state, index_buffer),
 };
 static const size_t vmw_binding_uav_offsets[] = {
     offsetof(struct vmw_ctx_binding_state, ua_views[0].views),
 };
 static const size_t vmw_binding_cs_uav_offsets[] = {
     offsetof(struct vmw_ctx_binding_state, ua_views[1].views),
 };
 static const size_t vmw_binding_so_offsets[] = {
     offsetof(struct vmw_ctx_binding_state, so_state),
 };
 
 static const struct vmw_binding_info vmw_binding_infos[] = {
     [vmw_ctx_binding_shader] = {
         .size = sizeof(struct vmw_ctx_bindinfo_shader),
         .offsets = vmw_binding_shader_offsets,
         .scrub_func = vmw_binding_scrub_shader},
     [vmw_ctx_binding_rt] = {
         .size = sizeof(struct vmw_ctx_bindinfo_view),
         .offsets = vmw_binding_rt_offsets,
         .scrub_func = vmw_binding_scrub_render_target},
     [vmw_ctx_binding_tex] = {
         .size = sizeof(struct vmw_ctx_bindinfo_tex),
         .offsets = vmw_binding_tex_offsets,
         .scrub_func = vmw_binding_scrub_texture},
     [vmw_ctx_binding_cb] = {
         .size = sizeof(struct vmw_ctx_bindinfo_cb),
         .offsets = vmw_binding_cb_offsets,
         .scrub_func = vmw_binding_scrub_cb},
     [vmw_ctx_binding_dx_shader] = {
         .size = sizeof(struct vmw_ctx_bindinfo_shader),
         .offsets = vmw_binding_shader_offsets,
         .scrub_func = vmw_binding_scrub_dx_shader},
     [vmw_ctx_binding_dx_rt] = {
         .size = sizeof(struct vmw_ctx_bindinfo_view),
         .offsets = vmw_binding_rt_offsets,
         .scrub_func = vmw_binding_scrub_dx_rt},
     [vmw_ctx_binding_sr] = {
         .size = sizeof(struct vmw_ctx_bindinfo_view),
         .offsets = vmw_binding_sr_offsets,
         .scrub_func = vmw_binding_scrub_sr},
     [vmw_ctx_binding_ds] = {
         .size = sizeof(struct vmw_ctx_bindinfo_view),
         .offsets = vmw_binding_dx_ds_offsets,
         .scrub_func = vmw_binding_scrub_dx_rt},
     [vmw_ctx_binding_so_target] = {
         .size = sizeof(struct vmw_ctx_bindinfo_so_target),
         .offsets = vmw_binding_so_target_offsets,
         .scrub_func = vmw_binding_scrub_so_target},
     [vmw_ctx_binding_vb] = {
         .size = sizeof(struct vmw_ctx_bindinfo_vb),
         .offsets = vmw_binding_vb_offsets,
         .scrub_func = vmw_binding_scrub_vb},
     [vmw_ctx_binding_ib] = {
         .size = sizeof(struct vmw_ctx_bindinfo_ib),
         .offsets = vmw_binding_ib_offsets,
         .scrub_func = vmw_binding_scrub_ib},
     [vmw_ctx_binding_uav] = {
         .size = sizeof(struct vmw_ctx_bindinfo_view),
         .offsets = vmw_binding_uav_offsets,
         .scrub_func = vmw_binding_scrub_uav},
     [vmw_ctx_binding_cs_uav] = {
         .size = sizeof(struct vmw_ctx_bindinfo_view),
         .offsets = vmw_binding_cs_uav_offsets,
         .scrub_func = vmw_binding_scrub_cs_uav},
     [vmw_ctx_binding_so] = {
         .size = sizeof(struct vmw_ctx_bindinfo_so),
         .offsets = vmw_binding_so_offsets,
         .scrub_func = vmw_binding_scrub_so},
 };
 
 /**
  * vmw_cbs_context - Return a pointer to the context resource of a
  * context binding state tracker.
  *
  * @cbs: The context binding state tracker.
  *
  * Provided there are any active bindings, this function will return an
  * unreferenced pointer to the context resource that owns the context
  * binding state tracker. If there are no active bindings, this function
  * will return NULL. Note that the caller must somehow ensure that a reference
  * is held on the context resource prior to calling this function.
  */
 static const struct vmw_resource *
 vmw_cbs_context(const struct vmw_ctx_binding_state *cbs)
 {
     if (list_empty(&cbs->list))
         return NULL;
 
     return list_first_entry(&cbs->list, struct vmw_ctx_bindinfo,
                 ctx_list)->ctx;
 }
 
 /**
  * vmw_binding_loc - determine the struct vmw_ctx_bindinfo slot location.
  *
  * @cbs: Pointer to a struct vmw_ctx_binding state which holds the slot.
  * @bt: The binding type.
  * @shader_slot: The shader slot of the binding. If none, then set to 0.
  * @slot: The slot of the binding.
  */
 static struct vmw_ctx_bindinfo *
 vmw_binding_loc(struct vmw_ctx_binding_state *cbs,
         enum vmw_ctx_binding_type bt, u32 shader_slot, u32 slot)
 {
     const struct vmw_binding_info *b = &vmw_binding_infos[bt];
     size_t offset = b->offsets[shader_slot] + b->size*slot;
 
     return (struct vmw_ctx_bindinfo *)((u8 *) cbs + offset);
 }
 
 /**
  * vmw_binding_drop: Stop tracking a context binding
  *
  * @bi: 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_binding_drop(struct vmw_ctx_bindinfo *bi)
 {
     list_del(&bi->ctx_list);
     if (!list_empty(&bi->res_list))
         list_del(&bi->res_list);
     bi->ctx = NULL;
 }
 
 /**
  * vmw_binding_add: Start tracking a context binding
  *
  * @cbs: Pointer to the context binding state tracker.
  * @bi: Information about the binding to track.
  * @shader_slot: The shader slot of the binding.
  * @slot: The slot of the binding.
  *
  * Starts tracking the binding in the context binding
  * state structure @cbs.
  */
 void vmw_binding_add(struct vmw_ctx_binding_state *cbs,
             const struct vmw_ctx_bindinfo *bi,
             u32 shader_slot, u32 slot)
 {
     struct vmw_ctx_bindinfo *loc =
         vmw_binding_loc(cbs, bi->bt, shader_slot, slot);
     const struct vmw_binding_info *b = &vmw_binding_infos[bi->bt];
 
     if (loc->ctx != NULL)
         vmw_binding_drop(loc);
 
     memcpy(loc, bi, b->size);
     loc->scrubbed = false;
     list_add(&loc->ctx_list, &cbs->list);
     INIT_LIST_HEAD(&loc->res_list);
 }
 
 /**
  * vmw_binding_cb_offset_update: Update the offset of a cb binding
  *
  * @cbs: Pointer to the context binding state tracker.
  * @shader_slot: The shader slot of the binding.
  * @slot: The slot of the binding.
  * @offsetInBytes: The new offset of the binding.
  *
  * Updates the offset of an existing cb binding in the context binding
  * state structure @cbs.
  */
 void vmw_binding_cb_offset_update(struct vmw_ctx_binding_state *cbs,
                   u32 shader_slot, u32 slot, u32 offsetInBytes)
 {
     struct vmw_ctx_bindinfo *loc =
         vmw_binding_loc(cbs, vmw_ctx_binding_cb, shader_slot, slot);
     struct vmw_ctx_bindinfo_cb *loc_cb =
         (struct vmw_ctx_bindinfo_cb *)((u8 *) loc);
     loc_cb->offset = offsetInBytes;
 }
 
 /**
  * vmw_binding_add_uav_index - Add UAV index for tracking.
  * @cbs: Pointer to the context binding state tracker.
  * @slot: UAV type to which bind this index.
  * @index: The splice index to track.
  */
 void vmw_binding_add_uav_index(struct vmw_ctx_binding_state *cbs, uint32 slot,
                    uint32 index)
 {
     cbs->ua_views[slot].index = index;
 }
 
 /**
  * vmw_binding_transfer: Transfer a context binding tracking entry.
  *
  * @cbs: Pointer to the persistent context binding state tracker.
  * @from: Staged binding info built during execbuf
  * @bi: Information about the binding to track.
  *
  */
 static void vmw_binding_transfer(struct vmw_ctx_binding_state *cbs,
                  const struct vmw_ctx_binding_state *from,
                  const struct vmw_ctx_bindinfo *bi)
 {
     size_t offset = (unsigned long)bi - (unsigned long)from;
     struct vmw_ctx_bindinfo *loc = (struct vmw_ctx_bindinfo *)
         ((unsigned long) cbs + offset);
 
     if (loc->ctx != NULL) {
         WARN_ON(bi->scrubbed);
 
         vmw_binding_drop(loc);
     }
 
     if (bi->res != NULL) {
         memcpy(loc, bi, vmw_binding_infos[bi->bt].size);
         list_add_tail(&loc->ctx_list, &cbs->list);
         list_add_tail(&loc->res_list, &loc->res->binding_head);
     }
 }
 
 /**
  * vmw_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_binding_state_kill(struct vmw_ctx_binding_state *cbs)
 {
     struct vmw_ctx_bindinfo *entry, *next;
 
     vmw_binding_state_scrub(cbs);
     list_for_each_entry_safe(entry, next, &cbs->list, ctx_list)
         vmw_binding_drop(entry);
 }
 
 /**
  * vmw_binding_state_scrub - Scrub all bindings associated with a
  * struct vmw_ctx_binding state structure.
  *
  * @cbs: Pointer to the context binding state tracker.
  *
  * Emits commands to scrub all bindings associated with the
  * context binding state tracker.
  */
 void vmw_binding_state_scrub(struct vmw_ctx_binding_state *cbs)
 {
     struct vmw_ctx_bindinfo *entry;
 
     list_for_each_entry(entry, &cbs->list, ctx_list) {
         if (!entry->scrubbed) {
             (void) vmw_binding_infos[entry->bt].scrub_func
                 (entry, false);
             entry->scrubbed = true;
         }
     }
 
     (void) vmw_binding_emit_dirty(cbs);
 }
 
 /**
  * vmw_binding_res_list_kill - Kill all bindings on a
  * resource binding list
  *
  * @head: list head of resource binding list
  *
  * Kills all bindings associated with a specific resource. Typically
  * called before the resource is destroyed.
  */
 void vmw_binding_res_list_kill(struct list_head *head)
 {
     struct vmw_ctx_bindinfo *entry, *next;
 
     vmw_binding_res_list_scrub(head);
     list_for_each_entry_safe(entry, next, head, res_list)
         vmw_binding_drop(entry);
 }
 
 /**
  * vmw_binding_res_list_scrub - Scrub all bindings on a
  * resource binding list
  *
  * @head: list head of resource binding list
  *
  * Scrub all bindings associated with a specific resource. Typically
  * called before the resource is evicted.
  */
 void vmw_binding_res_list_scrub(struct list_head *head)
 {
     struct vmw_ctx_bindinfo *entry;
 
     list_for_each_entry(entry, head, res_list) {
         if (!entry->scrubbed) {
             (void) vmw_binding_infos[entry->bt].scrub_func
                 (entry, false);
             entry->scrubbed = true;
         }
     }
 
     list_for_each_entry(entry, head, res_list) {
         struct vmw_ctx_binding_state *cbs =
             vmw_context_binding_state(entry->ctx);
 
         (void) vmw_binding_emit_dirty(cbs);
     }
 }
 
 
 /**
  * vmw_binding_state_commit - Commit staged binding info
  *
  * @to:   Staged binding info area to copy into to.
  * @from: Staged binding info built during execbuf.
  *
  * Transfers binding info from a temporary structure
  * (typically used by execbuf) to the persistent
  * structure in the context. This can be done once commands have been
  * submitted to hardware
  */
 void vmw_binding_state_commit(struct vmw_ctx_binding_state *to,
                   struct vmw_ctx_binding_state *from)
 {
     struct vmw_ctx_bindinfo *entry, *next;
 
     list_for_each_entry_safe(entry, next, &from->list, ctx_list) {
         vmw_binding_transfer(to, from, entry);
         vmw_binding_drop(entry);
     }
 
     /* Also transfer uav splice indices */
     to->ua_views[0].index = from->ua_views[0].index;
     to->ua_views[1].index = from->ua_views[1].index;
 }
 
 /**
  * vmw_binding_rebind_all - Rebind all scrubbed bindings of a context
  *
  * @cbs: Pointer to the context binding state tracker.
  *
  * Walks through the context binding list and rebinds all scrubbed
  * resources.
  */
 int vmw_binding_rebind_all(struct vmw_ctx_binding_state *cbs)
 {
     struct vmw_ctx_bindinfo *entry;
     int ret;
 
     list_for_each_entry(entry, &cbs->list, ctx_list) {
         if (likely(!entry->scrubbed))
             continue;
 
         if ((entry->res == NULL || entry->res->id ==
                 SVGA3D_INVALID_ID))
             continue;
 
         ret = vmw_binding_infos[entry->bt].scrub_func(entry, true);
         if (unlikely(ret != 0))
             return ret;
 
         entry->scrubbed = false;
     }
 
     return vmw_binding_emit_dirty(cbs);
 }
 
 /**
  * vmw_binding_scrub_shader - scrub a shader binding from a context.
  *
  * @bi: single binding information.
  * @rebind: Whether to issue a bind instead of scrub command.
  */
 static int vmw_binding_scrub_shader(struct vmw_ctx_bindinfo *bi, bool rebind)
 {
     struct vmw_ctx_bindinfo_shader *binding =
         container_of(bi, typeof(*binding), bi);
     struct vmw_private *dev_priv = bi->ctx->dev_priv;
     struct {
         SVGA3dCmdHeader header;
         SVGA3dCmdSetShader body;
     } *cmd;
 
     cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
     if (unlikely(cmd == NULL))
         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 = binding->shader_slot + SVGA3D_SHADERTYPE_MIN;
     cmd->body.shid = ((rebind) ? bi->res->id : SVGA3D_INVALID_ID);
     vmw_cmd_commit(dev_priv, sizeof(*cmd));
 
     return 0;
 }
 
 /**
  * vmw_binding_scrub_render_target - scrub a render target binding
  * from a context.
  *
  * @bi: single binding information.
  * @rebind: Whether to issue a bind instead of scrub command.
  */
 static int vmw_binding_scrub_render_target(struct vmw_ctx_bindinfo *bi,
                        bool rebind)
 {
     struct vmw_ctx_bindinfo_view *binding =
         container_of(bi, typeof(*binding), bi);
     struct vmw_private *dev_priv = bi->ctx->dev_priv;
     struct {
         SVGA3dCmdHeader header;
         SVGA3dCmdSetRenderTarget body;
     } *cmd;
 
     cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
     if (unlikely(cmd == NULL))
         return -ENOMEM;
 
     cmd->header.id = SVGA_3D_CMD_SETRENDERTARGET;
     cmd->header.size = sizeof(cmd->body);
     cmd->body.cid = bi->ctx->id;
     cmd->body.type = binding->slot;
     cmd->body.target.sid = ((rebind) ? bi->res->id : SVGA3D_INVALID_ID);
     cmd->body.target.face = 0;
     cmd->body.target.mipmap = 0;
     vmw_cmd_commit(dev_priv, sizeof(*cmd));
 
     return 0;
 }
 
 /**
  * vmw_binding_scrub_texture - scrub a texture binding from a context.
  *
  * @bi: single binding information.
  * @rebind: Whether to issue a bind instead of scrub command.
  *
  * 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_binding_scrub_texture(struct vmw_ctx_bindinfo *bi,
                      bool rebind)
 {
     struct vmw_ctx_bindinfo_tex *binding =
         container_of(bi, typeof(*binding), bi);
     struct vmw_private *dev_priv = bi->ctx->dev_priv;
     struct {
         SVGA3dCmdHeader header;
         struct {
             SVGA3dCmdSetTextureState c;
             SVGA3dTextureState s1;
         } body;
     } *cmd;
 
     cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
     if (unlikely(cmd == NULL))
         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 = binding->texture_stage;
     cmd->body.s1.name = SVGA3D_TS_BIND_TEXTURE;
     cmd->body.s1.value = ((rebind) ? bi->res->id : SVGA3D_INVALID_ID);
     vmw_cmd_commit(dev_priv, sizeof(*cmd));
 
     return 0;
 }
 
 /**
  * vmw_binding_scrub_dx_shader - scrub a dx shader binding from a context.
  *
  * @bi: single binding information.
  * @rebind: Whether to issue a bind instead of scrub command.
  */
 static int vmw_binding_scrub_dx_shader(struct vmw_ctx_bindinfo *bi, bool rebind)
 {
     struct vmw_ctx_bindinfo_shader *binding =
         container_of(bi, typeof(*binding), bi);
     struct vmw_private *dev_priv = bi->ctx->dev_priv;
     struct {
         SVGA3dCmdHeader header;
         SVGA3dCmdDXSetShader body;
     } *cmd;
 
     cmd = VMW_CMD_CTX_RESERVE(dev_priv, sizeof(*cmd), bi->ctx->id);
     if (unlikely(cmd == NULL))
         return -ENOMEM;
 
     cmd->header.id = SVGA_3D_CMD_DX_SET_SHADER;
     cmd->header.size = sizeof(cmd->body);
     cmd->body.type = binding->shader_slot + SVGA3D_SHADERTYPE_MIN;
     cmd->body.shaderId = ((rebind) ? bi->res->id : SVGA3D_INVALID_ID);
     vmw_cmd_commit(dev_priv, sizeof(*cmd));
 
     return 0;
 }
 
 /**
  * vmw_binding_scrub_cb - scrub a constant buffer binding from a context.
  *
  * @bi: single binding information.
  * @rebind: Whether to issue a bind instead of scrub command.
  */
 static int vmw_binding_scrub_cb(struct vmw_ctx_bindinfo *bi, bool rebind)
 {
     struct vmw_ctx_bindinfo_cb *binding =
         container_of(bi, typeof(*binding), bi);
     struct vmw_private *dev_priv = bi->ctx->dev_priv;
     struct {
         SVGA3dCmdHeader header;
         SVGA3dCmdDXSetSingleConstantBuffer body;
     } *cmd;
 
     cmd = VMW_CMD_CTX_RESERVE(dev_priv, sizeof(*cmd), bi->ctx->id);
     if (unlikely(cmd == NULL))
         return -ENOMEM;
 
     cmd->header.id = SVGA_3D_CMD_DX_SET_SINGLE_CONSTANT_BUFFER;
     cmd->header.size = sizeof(cmd->body);
     cmd->body.slot = binding->slot;
     cmd->body.type = binding->shader_slot + SVGA3D_SHADERTYPE_MIN;
     if (rebind) {
         cmd->body.offsetInBytes = binding->offset;
         cmd->body.sizeInBytes = binding->size;
         cmd->body.sid = bi->res->id;
     } else {
         cmd->body.offsetInBytes = 0;
         cmd->body.sizeInBytes = 0;
         cmd->body.sid = SVGA3D_INVALID_ID;
     }
     vmw_cmd_commit(dev_priv, sizeof(*cmd));
 
     return 0;
 }
 
 /**
  * vmw_collect_view_ids - Build view id data for a view binding command
  * without checking which bindings actually need to be emitted
  *
  * @cbs: Pointer to the context's struct vmw_ctx_binding_state
  * @biv: Pointer to where the binding info array is stored in @cbs
  * @max_num: Maximum number of entries in the @bi array.
  *
  * Scans the @bi array for bindings and builds a buffer of view id data.
  * Stops at the first non-existing binding in the @bi array.
  * On output, @cbs->bind_cmd_count contains the number of bindings to be
  * emitted, @cbs->bind_first_slot is set to zero, and @cbs->bind_cmd_buffer
  * contains the command data.
  */
 static void vmw_collect_view_ids(struct vmw_ctx_binding_state *cbs,
                  const struct vmw_ctx_bindinfo_view *biv,
                  u32 max_num)
 {
     unsigned long i;
 
     cbs->bind_cmd_count = 0;
     cbs->bind_first_slot = 0;
 
     for (i = 0; i < max_num; ++i, ++biv) {
         if (!biv->bi.ctx)
             break;
 
         cbs->bind_cmd_buffer[cbs->bind_cmd_count++] =
             ((biv->bi.scrubbed) ?
              SVGA3D_INVALID_ID : biv->bi.res->id);
     }
 }
 
 /**
  * vmw_collect_dirty_view_ids - Build view id data for a view binding command
  *
  * @cbs: Pointer to the context's struct vmw_ctx_binding_state
  * @bi: Pointer to where the binding info array is stored in @cbs
  * @dirty: Bitmap indicating which bindings need to be emitted.
  * @max_num: Maximum number of entries in the @bi array.
  *
  * Scans the @bi array for bindings that need to be emitted and
  * builds a buffer of view id data.
  * On output, @cbs->bind_cmd_count contains the number of bindings to be
  * emitted, @cbs->bind_first_slot indicates the index of the first emitted
  * binding, and @cbs->bind_cmd_buffer contains the command data.
  */
 static void vmw_collect_dirty_view_ids(struct vmw_ctx_binding_state *cbs,
                        const struct vmw_ctx_bindinfo *bi,
                        unsigned long *dirty,
                        u32 max_num)
 {
     const struct vmw_ctx_bindinfo_view *biv =
         container_of(bi, struct vmw_ctx_bindinfo_view, bi);
     unsigned long i, next_bit;
 
     cbs->bind_cmd_count = 0;
     i = find_first_bit(dirty, max_num);
     next_bit = i;
     cbs->bind_first_slot = i;
 
     biv += i;
     for (; i < max_num; ++i, ++biv) {
         cbs->bind_cmd_buffer[cbs->bind_cmd_count++] =
             ((!biv->bi.ctx || biv->bi.scrubbed) ?
              SVGA3D_INVALID_ID : biv->bi.res->id);
 
         if (next_bit == i) {
             next_bit = find_next_bit(dirty, max_num, i + 1);
             if (next_bit >= max_num)
                 break;
         }
     }
 }
 
 /**
  * vmw_emit_set_sr - Issue delayed DX shader resource binding commands
  *
  * @cbs: Pointer to the context's struct vmw_ctx_binding_state
  * @shader_slot: The shader slot of the binding.
  */
 static int vmw_emit_set_sr(struct vmw_ctx_binding_state *cbs,
                int shader_slot)
 {
     const struct vmw_ctx_bindinfo *loc =
         &cbs->per_shader[shader_slot].shader_res[0].bi;
     struct {
         SVGA3dCmdHeader header;
         SVGA3dCmdDXSetShaderResources body;
     } *cmd;
     size_t cmd_size, view_id_size;
     const struct vmw_resource *ctx = vmw_cbs_context(cbs);
 
     vmw_collect_dirty_view_ids(cbs, loc,
                    cbs->per_shader[shader_slot].dirty_sr,
                    SVGA3D_DX_MAX_SRVIEWS);
     if (cbs->bind_cmd_count == 0)
         return 0;
 
     view_id_size = cbs->bind_cmd_count*sizeof(uint32);
     cmd_size = sizeof(*cmd) + view_id_size;
     cmd = VMW_CMD_CTX_RESERVE(ctx->dev_priv, cmd_size, ctx->id);
     if (unlikely(cmd == NULL))
         return -ENOMEM;
 
     cmd->header.id = SVGA_3D_CMD_DX_SET_SHADER_RESOURCES;
     cmd->header.size = sizeof(cmd->body) + view_id_size;
     cmd->body.type = shader_slot + SVGA3D_SHADERTYPE_MIN;
     cmd->body.startView = cbs->bind_first_slot;
 
     memcpy(&cmd[1], cbs->bind_cmd_buffer, view_id_size);
 
     vmw_cmd_commit(ctx->dev_priv, cmd_size);
     bitmap_clear(cbs->per_shader[shader_slot].dirty_sr,
              cbs->bind_first_slot, cbs->bind_cmd_count);
 
     return 0;
 }
 
 /**
  * vmw_emit_set_rt - Issue delayed DX rendertarget binding commands
  *
  * @cbs: Pointer to the context's struct vmw_ctx_binding_state
  */
 static int vmw_emit_set_rt(struct vmw_ctx_binding_state *cbs)
 {
     const struct vmw_ctx_bindinfo_view *loc = &cbs->render_targets[0];
     struct {
         SVGA3dCmdHeader header;
         SVGA3dCmdDXSetRenderTargets body;
     } *cmd;
     size_t cmd_size, view_id_size;
     const struct vmw_resource *ctx = vmw_cbs_context(cbs);
 
     vmw_collect_view_ids(cbs, loc, SVGA3D_DX_MAX_RENDER_TARGETS);
     view_id_size = cbs->bind_cmd_count*sizeof(uint32);
     cmd_size = sizeof(*cmd) + view_id_size;
     cmd = VMW_CMD_CTX_RESERVE(ctx->dev_priv, cmd_size, ctx->id);
     if (unlikely(cmd == NULL))
         return -ENOMEM;
 
     cmd->header.id = SVGA_3D_CMD_DX_SET_RENDERTARGETS;
     cmd->header.size = sizeof(cmd->body) + view_id_size;
 
     if (cbs->ds_view.bi.ctx && !cbs->ds_view.bi.scrubbed)
         cmd->body.depthStencilViewId = cbs->ds_view.bi.res->id;
     else
         cmd->body.depthStencilViewId = SVGA3D_INVALID_ID;
 
     memcpy(&cmd[1], cbs->bind_cmd_buffer, view_id_size);
 
     vmw_cmd_commit(ctx->dev_priv, cmd_size);
 
     return 0;
 
 }
 
 /**
  * vmw_collect_so_targets - Build SVGA3dSoTarget data for a binding command
  * without checking which bindings actually need to be emitted
  *
  * @cbs: Pointer to the context's struct vmw_ctx_binding_state
  * @biso: Pointer to where the binding info array is stored in @cbs
  * @max_num: Maximum number of entries in the @bi array.
  *
  * Scans the @bi array for bindings and builds a buffer of SVGA3dSoTarget data.
  * Stops at the first non-existing binding in the @bi array.
  * On output, @cbs->bind_cmd_count contains the number of bindings to be
  * emitted, @cbs->bind_first_slot is set to zero, and @cbs->bind_cmd_buffer
  * contains the command data.
  */
 static void vmw_collect_so_targets(struct vmw_ctx_binding_state *cbs,
                    const struct vmw_ctx_bindinfo_so_target *biso,
                    u32 max_num)
 {
     unsigned long i;
     SVGA3dSoTarget *so_buffer = (SVGA3dSoTarget *) cbs->bind_cmd_buffer;
 
     cbs->bind_cmd_count = 0;
     cbs->bind_first_slot = 0;
 
     for (i = 0; i < max_num; ++i, ++biso, ++so_buffer,
             ++cbs->bind_cmd_count) {
         if (!biso->bi.ctx)
             break;
 
         if (!biso->bi.scrubbed) {
             so_buffer->sid = biso->bi.res->id;
             so_buffer->offset = biso->offset;
             so_buffer->sizeInBytes = biso->size;
         } else {
             so_buffer->sid = SVGA3D_INVALID_ID;
             so_buffer->offset = 0;
             so_buffer->sizeInBytes = 0;
         }
     }
 }
 
 /**
  * vmw_emit_set_so_target - Issue delayed streamout binding commands
  *
  * @cbs: Pointer to the context's struct vmw_ctx_binding_state
  */
 static int vmw_emit_set_so_target(struct vmw_ctx_binding_state *cbs)
 {
     const struct vmw_ctx_bindinfo_so_target *loc = &cbs->so_targets[0];
     struct {
         SVGA3dCmdHeader header;
         SVGA3dCmdDXSetSOTargets body;
     } *cmd;
     size_t cmd_size, so_target_size;
     const struct vmw_resource *ctx = vmw_cbs_context(cbs);
 
     vmw_collect_so_targets(cbs, loc, SVGA3D_DX_MAX_SOTARGETS);
     if (cbs->bind_cmd_count == 0)
         return 0;
 
     so_target_size = cbs->bind_cmd_count*sizeof(SVGA3dSoTarget);
     cmd_size = sizeof(*cmd) + so_target_size;
     cmd = VMW_CMD_CTX_RESERVE(ctx->dev_priv, cmd_size, ctx->id);
     if (unlikely(cmd == NULL))
         return -ENOMEM;
 
     cmd->header.id = SVGA_3D_CMD_DX_SET_SOTARGETS;
     cmd->header.size = sizeof(cmd->body) + so_target_size;
     memcpy(&cmd[1], cbs->bind_cmd_buffer, so_target_size);
 
     vmw_cmd_commit(ctx->dev_priv, cmd_size);
 
     return 0;
 
 }
 
 /**
  * vmw_binding_emit_dirty_ps - Issue delayed per shader binding commands
  *
  * @cbs: Pointer to the context's struct vmw_ctx_binding_state
  *
  */
 static int vmw_binding_emit_dirty_ps(struct vmw_ctx_binding_state *cbs)
 {
     struct vmw_dx_shader_bindings *sb = &cbs->per_shader[0];
     u32 i;
     int ret;
 
     for (i = 0; i < SVGA3D_NUM_SHADERTYPE_DX10; ++i, ++sb) {
         if (!test_bit(VMW_BINDING_PS_SR_BIT, &sb->dirty))
             continue;
 
         ret = vmw_emit_set_sr(cbs, i);
         if (ret)
             break;
 
         __clear_bit(VMW_BINDING_PS_SR_BIT, &sb->dirty);
     }
 
     return 0;
 }
 
 /**
  * vmw_collect_dirty_vbs - Build SVGA3dVertexBuffer data for a
  * SVGA3dCmdDXSetVertexBuffers command
  *
  * @cbs: Pointer to the context's struct vmw_ctx_binding_state
  * @bi: Pointer to where the binding info array is stored in @cbs
  * @dirty: Bitmap indicating which bindings need to be emitted.
  * @max_num: Maximum number of entries in the @bi array.
  *
  * Scans the @bi array for bindings that need to be emitted and
  * builds a buffer of SVGA3dVertexBuffer data.
  * On output, @cbs->bind_cmd_count contains the number of bindings to be
  * emitted, @cbs->bind_first_slot indicates the index of the first emitted
  * binding, and @cbs->bind_cmd_buffer contains the command data.
  */
 static void vmw_collect_dirty_vbs(struct vmw_ctx_binding_state *cbs,
                   const struct vmw_ctx_bindinfo *bi,
                   unsigned long *dirty,
                   u32 max_num)
 {
     const struct vmw_ctx_bindinfo_vb *biv =
         container_of(bi, struct vmw_ctx_bindinfo_vb, bi);
     unsigned long i, next_bit;
     SVGA3dVertexBuffer *vbs = (SVGA3dVertexBuffer *) &cbs->bind_cmd_buffer;
 
     cbs->bind_cmd_count = 0;
     i = find_first_bit(dirty, max_num);
     next_bit = i;
     cbs->bind_first_slot = i;
 
     biv += i;
     for (; i < max_num; ++i, ++biv, ++vbs) {
         if (!biv->bi.ctx || biv->bi.scrubbed) {
             vbs->sid = SVGA3D_INVALID_ID;
             vbs->stride = 0;
             vbs->offset = 0;
         } else {
             vbs->sid = biv->bi.res->id;
             vbs->stride = biv->stride;
             vbs->offset = biv->offset;
         }
         cbs->bind_cmd_count++;
         if (next_bit == i) {
             next_bit = find_next_bit(dirty, max_num, i + 1);
             if (next_bit >= max_num)
                 break;
         }
     }
 }
 
 /**
  * vmw_emit_set_vb - Issue delayed vertex buffer binding commands
  *
  * @cbs: Pointer to the context's struct vmw_ctx_binding_state
  *
  */
 static int vmw_emit_set_vb(struct vmw_ctx_binding_state *cbs)
 {
     const struct vmw_ctx_bindinfo *loc =
         &cbs->vertex_buffers[0].bi;
     struct {
         SVGA3dCmdHeader header;
         SVGA3dCmdDXSetVertexBuffers body;
     } *cmd;
     size_t cmd_size, set_vb_size;
     const struct vmw_resource *ctx = vmw_cbs_context(cbs);
 
     vmw_collect_dirty_vbs(cbs, loc, cbs->dirty_vb,
                  SVGA3D_DX_MAX_VERTEXBUFFERS);
     if (cbs->bind_cmd_count == 0)
         return 0;
 
     set_vb_size = cbs->bind_cmd_count*sizeof(SVGA3dVertexBuffer);
     cmd_size = sizeof(*cmd) + set_vb_size;
     cmd = VMW_CMD_CTX_RESERVE(ctx->dev_priv, cmd_size, ctx->id);
     if (unlikely(cmd == NULL))
         return -ENOMEM;
 
     cmd->header.id = SVGA_3D_CMD_DX_SET_VERTEX_BUFFERS;
     cmd->header.size = sizeof(cmd->body) + set_vb_size;
     cmd->body.startBuffer = cbs->bind_first_slot;
 
     memcpy(&cmd[1], cbs->bind_cmd_buffer, set_vb_size);
 
     vmw_cmd_commit(ctx->dev_priv, cmd_size);
     bitmap_clear(cbs->dirty_vb,
              cbs->bind_first_slot, cbs->bind_cmd_count);
 
     return 0;
 }
 
 static int vmw_emit_set_uav(struct vmw_ctx_binding_state *cbs)
 {
     const struct vmw_ctx_bindinfo_view *loc = &cbs->ua_views[0].views[0];
     struct {
         SVGA3dCmdHeader header;
         SVGA3dCmdDXSetUAViews body;
     } *cmd;
     size_t cmd_size, view_id_size;
     const struct vmw_resource *ctx = vmw_cbs_context(cbs);
 
     vmw_collect_view_ids(cbs, loc, vmw_max_num_uavs(cbs->dev_priv));
     view_id_size = cbs->bind_cmd_count*sizeof(uint32);
     cmd_size = sizeof(*cmd) + view_id_size;
     cmd = VMW_CMD_CTX_RESERVE(ctx->dev_priv, cmd_size, ctx->id);
     if (!cmd)
         return -ENOMEM;
 
     cmd->header.id = SVGA_3D_CMD_DX_SET_UA_VIEWS;
     cmd->header.size = sizeof(cmd->body) + view_id_size;
 
     /* Splice index is specified user-space   */
     cmd->body.uavSpliceIndex = cbs->ua_views[0].index;
 
     memcpy(&cmd[1], cbs->bind_cmd_buffer, view_id_size);
 
     vmw_cmd_commit(ctx->dev_priv, cmd_size);
 
     return 0;
 }
 
 static int vmw_emit_set_cs_uav(struct vmw_ctx_binding_state *cbs)
 {
     const struct vmw_ctx_bindinfo_view *loc = &cbs->ua_views[1].views[0];
     struct {
         SVGA3dCmdHeader header;
         SVGA3dCmdDXSetCSUAViews body;
     } *cmd;
     size_t cmd_size, view_id_size;
     const struct vmw_resource *ctx = vmw_cbs_context(cbs);
 
     vmw_collect_view_ids(cbs, loc, vmw_max_num_uavs(cbs->dev_priv));
     view_id_size = cbs->bind_cmd_count*sizeof(uint32);
     cmd_size = sizeof(*cmd) + view_id_size;
     cmd = VMW_CMD_CTX_RESERVE(ctx->dev_priv, cmd_size, ctx->id);
     if (!cmd)
         return -ENOMEM;
 
     cmd->header.id = SVGA_3D_CMD_DX_SET_CS_UA_VIEWS;
     cmd->header.size = sizeof(cmd->body) + view_id_size;
 
     /* Start index is specified user-space */
     cmd->body.startIndex = cbs->ua_views[1].index;
 
     memcpy(&cmd[1], cbs->bind_cmd_buffer, view_id_size);
 
     vmw_cmd_commit(ctx->dev_priv, cmd_size);
 
     return 0;
 }
 
 /**
  * vmw_binding_emit_dirty - Issue delayed binding commands
  *
  * @cbs: Pointer to the context's struct vmw_ctx_binding_state
  *
  * This function issues the delayed binding commands that arise from
  * previous scrub / unscrub calls. These binding commands are typically
  * commands that batch a number of bindings and therefore it makes sense
  * to delay them.
  */
 static int vmw_binding_emit_dirty(struct vmw_ctx_binding_state *cbs)
 {
     int ret = 0;
     unsigned long hit = 0;
 
     while ((hit = find_next_bit(&cbs->dirty, VMW_BINDING_NUM_BITS, hit))
           < VMW_BINDING_NUM_BITS) {
 
         switch (hit) {
         case VMW_BINDING_RT_BIT:
             ret = vmw_emit_set_rt(cbs);
             break;
         case VMW_BINDING_PS_BIT:
             ret = vmw_binding_emit_dirty_ps(cbs);
             break;
         case VMW_BINDING_SO_T_BIT:
             ret = vmw_emit_set_so_target(cbs);
             break;
         case VMW_BINDING_VB_BIT:
             ret = vmw_emit_set_vb(cbs);
             break;
         case VMW_BINDING_UAV_BIT:
             ret = vmw_emit_set_uav(cbs);
             break;
         case VMW_BINDING_CS_UAV_BIT:
             ret = vmw_emit_set_cs_uav(cbs);
             break;
         default:
             BUG();
         }
         if (ret)
             return ret;
 
         __clear_bit(hit, &cbs->dirty);
         hit++;
     }
 
     return 0;
 }
 
 /**
  * vmw_binding_scrub_sr - Schedule a dx shaderresource binding
  * scrub from a context
  *
  * @bi: single binding information.
  * @rebind: Whether to issue a bind instead of scrub command.
  */
 static int vmw_binding_scrub_sr(struct vmw_ctx_bindinfo *bi, bool rebind)
 {
     struct vmw_ctx_bindinfo_view *biv =
         container_of(bi, struct vmw_ctx_bindinfo_view, bi);
     struct vmw_ctx_binding_state *cbs =
         vmw_context_binding_state(bi->ctx);
 
     __set_bit(biv->slot, cbs->per_shader[biv->shader_slot].dirty_sr);
     __set_bit(VMW_BINDING_PS_SR_BIT,
           &cbs->per_shader[biv->shader_slot].dirty);
     __set_bit(VMW_BINDING_PS_BIT, &cbs->dirty);
 
     return 0;
 }
 
 /**
  * vmw_binding_scrub_dx_rt - Schedule a dx rendertarget binding
  * scrub from a context
  *
  * @bi: single binding information.
  * @rebind: Whether to issue a bind instead of scrub command.
  */
 static int vmw_binding_scrub_dx_rt(struct vmw_ctx_bindinfo *bi, bool rebind)
 {
     struct vmw_ctx_binding_state *cbs =
         vmw_context_binding_state(bi->ctx);
 
     __set_bit(VMW_BINDING_RT_BIT, &cbs->dirty);
 
     return 0;
 }
 
 /**
  * vmw_binding_scrub_so_target - Schedule a dx streamoutput buffer binding
  * scrub from a context
  *
  * @bi: single binding information.
  * @rebind: Whether to issue a bind instead of scrub command.
  */
 static int vmw_binding_scrub_so_target(struct vmw_ctx_bindinfo *bi, bool rebind)
 {
     struct vmw_ctx_binding_state *cbs =
         vmw_context_binding_state(bi->ctx);
 
     __set_bit(VMW_BINDING_SO_T_BIT, &cbs->dirty);
 
     return 0;
 }
 
 /**
  * vmw_binding_scrub_vb - Schedule a dx vertex buffer binding
  * scrub from a context
  *
  * @bi: single binding information.
  * @rebind: Whether to issue a bind instead of scrub command.
  */
 static int vmw_binding_scrub_vb(struct vmw_ctx_bindinfo *bi, bool rebind)
 {
     struct vmw_ctx_bindinfo_vb *bivb =
         container_of(bi, struct vmw_ctx_bindinfo_vb, bi);
     struct vmw_ctx_binding_state *cbs =
         vmw_context_binding_state(bi->ctx);
 
     __set_bit(bivb->slot, cbs->dirty_vb);
     __set_bit(VMW_BINDING_VB_BIT, &cbs->dirty);
 
     return 0;
 }
 
 /**
  * vmw_binding_scrub_ib - scrub a dx index buffer binding from a context
  *
  * @bi: single binding information.
  * @rebind: Whether to issue a bind instead of scrub command.
  */
 static int vmw_binding_scrub_ib(struct vmw_ctx_bindinfo *bi, bool rebind)
 {
     struct vmw_ctx_bindinfo_ib *binding =
         container_of(bi, typeof(*binding), bi);
     struct vmw_private *dev_priv = bi->ctx->dev_priv;
     struct {
         SVGA3dCmdHeader header;
         SVGA3dCmdDXSetIndexBuffer body;
     } *cmd;
 
     cmd = VMW_CMD_CTX_RESERVE(dev_priv, sizeof(*cmd), bi->ctx->id);
     if (unlikely(cmd == NULL))
         return -ENOMEM;
 
     cmd->header.id = SVGA_3D_CMD_DX_SET_INDEX_BUFFER;
     cmd->header.size = sizeof(cmd->body);
     if (rebind) {
         cmd->body.sid = bi->res->id;
         cmd->body.format = binding->format;
         cmd->body.offset = binding->offset;
     } else {
         cmd->body.sid = SVGA3D_INVALID_ID;
         cmd->body.format = 0;
         cmd->body.offset = 0;
     }
 
     vmw_cmd_commit(dev_priv, sizeof(*cmd));
 
     return 0;
 }
 
 static int vmw_binding_scrub_uav(struct vmw_ctx_bindinfo *bi, bool rebind)
 {
     struct vmw_ctx_binding_state *cbs = vmw_context_binding_state(bi->ctx);
 
     __set_bit(VMW_BINDING_UAV_BIT, &cbs->dirty);
     return 0;
 }
 
 static int vmw_binding_scrub_cs_uav(struct vmw_ctx_bindinfo *bi, bool rebind)
 {
     struct vmw_ctx_binding_state *cbs = vmw_context_binding_state(bi->ctx);
 
     __set_bit(VMW_BINDING_CS_UAV_BIT, &cbs->dirty);
     return 0;
 }
 
 /**
  * vmw_binding_scrub_so - Scrub a streamoutput binding from context.
  * @bi: Single binding information.
  * @rebind: Whether to issue a bind instead of scrub command.
  */
 static int vmw_binding_scrub_so(struct vmw_ctx_bindinfo *bi, bool rebind)
 {
     struct vmw_ctx_bindinfo_so *binding =
         container_of(bi, typeof(*binding), bi);
     struct vmw_private *dev_priv = bi->ctx->dev_priv;
     struct {
         SVGA3dCmdHeader header;
         SVGA3dCmdDXSetStreamOutput body;
     } *cmd;
 
     cmd = VMW_CMD_CTX_RESERVE(dev_priv, sizeof(*cmd), bi->ctx->id);
     if (!cmd)
         return -ENOMEM;
 
     cmd->header.id = SVGA_3D_CMD_DX_SET_STREAMOUTPUT;
     cmd->header.size = sizeof(cmd->body);
     cmd->body.soid = rebind ? bi->res->id : SVGA3D_INVALID_ID;
     vmw_cmd_commit(dev_priv, sizeof(*cmd));
 
     return 0;
 }
 
 /**
  * vmw_binding_state_alloc - Allocate a struct vmw_ctx_binding_state.
  *
  * @dev_priv: Pointer to a device private structure.
  *
  * Returns a pointer to a newly allocated struct or an error pointer on error.
  */
 struct vmw_ctx_binding_state *
 vmw_binding_state_alloc(struct vmw_private *dev_priv)
 {
     struct vmw_ctx_binding_state *cbs;
 
     cbs = vzalloc(sizeof(*cbs));
     if (!cbs) {
         return ERR_PTR(-ENOMEM);
     }
 
     cbs->dev_priv = dev_priv;
     INIT_LIST_HEAD(&cbs->list);
 
     return cbs;
 }
 
 /**
  * vmw_binding_state_free - Free a struct vmw_ctx_binding_state.
  *
  * @cbs: Pointer to the struct vmw_ctx_binding_state to be freed.
  */
 void vmw_binding_state_free(struct vmw_ctx_binding_state *cbs)
 {
     vfree(cbs);
 }
 
 /**
  * vmw_binding_state_list - Get the binding list of a
  * struct vmw_ctx_binding_state
  *
  * @cbs: Pointer to the struct vmw_ctx_binding_state
  *
  * Returns the binding list which can be used to traverse through the bindings
  * and access the resource information of all bindings.
  */
 struct list_head *vmw_binding_state_list(struct vmw_ctx_binding_state *cbs)
 {
     return &cbs->list;
 }
 
 /**
  * vmw_binding_state_reset - clear a struct vmw_ctx_binding_state
  *
  * @cbs: Pointer to the struct vmw_ctx_binding_state to be cleared
  *
  * Drops all bindings registered in @cbs. No device binding actions are
  * performed.
  */
 void vmw_binding_state_reset(struct vmw_ctx_binding_state *cbs)
 {
     struct vmw_ctx_bindinfo *entry, *next;
 
     list_for_each_entry_safe(entry, next, &cbs->list, ctx_list)
         vmw_binding_drop(entry);
 }
 
 /**
  * vmw_binding_dirtying - Return whether a binding type is dirtying its resource
  * @binding_type: The binding type
  *
  * Each time a resource is put on the validation list as the result of a
  * context binding referencing it, we need to determine whether that resource
  * will be dirtied (written to by the GPU) as a result of the corresponding
  * GPU operation. Currently rendertarget-, depth-stencil-, stream-output-target
  * and unordered access view bindings are capable of dirtying its resource.
  *
  * Return: Whether the binding type dirties the resource its binding points to.
  */
 u32 vmw_binding_dirtying(enum vmw_ctx_binding_type binding_type)
 {
     static u32 is_binding_dirtying[vmw_ctx_binding_max] = {
         [vmw_ctx_binding_rt] = VMW_RES_DIRTY_SET,
         [vmw_ctx_binding_dx_rt] = VMW_RES_DIRTY_SET,
         [vmw_ctx_binding_ds] = VMW_RES_DIRTY_SET,
         [vmw_ctx_binding_so_target] = VMW_RES_DIRTY_SET,
         [vmw_ctx_binding_uav] = VMW_RES_DIRTY_SET,
         [vmw_ctx_binding_cs_uav] = VMW_RES_DIRTY_SET,
     };
 
     /* Review this function as new bindings are added. */
     BUILD_BUG_ON(vmw_ctx_binding_max != 14);
     return is_binding_dirtying[binding_type];
 }
 
 /*
  * This function is unused at run-time, and only used to hold various build
  * asserts important for code optimization assumptions.
  */
 static void vmw_binding_build_asserts(void)
 {
     BUILD_BUG_ON(SVGA3D_NUM_SHADERTYPE_DX10 != 3);
     BUILD_BUG_ON(SVGA3D_DX_MAX_RENDER_TARGETS > SVGA3D_RT_MAX);
     BUILD_BUG_ON(sizeof(uint32) != sizeof(u32));
 
     /*
      * struct vmw_ctx_binding_state::bind_cmd_buffer is used for various
      * view id arrays.
      */
     BUILD_BUG_ON(VMW_MAX_VIEW_BINDINGS < SVGA3D_RT_MAX);
     BUILD_BUG_ON(VMW_MAX_VIEW_BINDINGS < SVGA3D_DX_MAX_SRVIEWS);
     BUILD_BUG_ON(VMW_MAX_VIEW_BINDINGS < SVGA3D_DX_MAX_CONSTBUFFERS);
 
     /*
      * struct vmw_ctx_binding_state::bind_cmd_buffer is used for
      * u32 view ids, SVGA3dSoTargets and SVGA3dVertexBuffers
      */
     BUILD_BUG_ON(SVGA3D_DX_MAX_SOTARGETS*sizeof(SVGA3dSoTarget) >
              VMW_MAX_VIEW_BINDINGS*sizeof(u32));
     BUILD_BUG_ON(SVGA3D_DX_MAX_VERTEXBUFFERS*sizeof(SVGA3dVertexBuffer) >
              VMW_MAX_VIEW_BINDINGS*sizeof(u32));
 }

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