r300g: use internal BO handle for add_buffer and write_reloc

Small perf improvement in ipers.

radeon_drm_get_cs_handle is exactly what this commit tries to avoid
in every write_reloc.

13 files changed, 77 insertions, 49 deletions

diff --git a/src/gallium/drivers/r300/r300_context.h b/src/gallium/drivers/r300/r300_context.h
index 2b97e4f8e28..93c20a0a6a0 100644
--- a/src/gallium/drivers/r300/r300_context.h
+++ b/src/gallium/drivers/r300/r300_context.h
@@ -282,6 +282,7 @@ struct r300_query {
 
     /* The buffer where query results are stored. */
     struct r300_winsys_buffer *buffer;
+    struct r300_winsys_cs_buffer *cs_buffer;
     /* The size of the buffer. */
     unsigned buffer_size;
     /* The domain of the buffer. */
@@ -313,6 +314,7 @@ struct r300_surface {
 
     /* Winsys buffer backing the texture. */
     struct r300_winsys_buffer *buffer;
+    struct r300_winsys_cs_buffer *cs_buffer;
 
     enum r300_buffer_domain domain;
 
@@ -396,6 +398,7 @@ struct r300_texture {
 
     /* Pipe buffer backing this texture. */
     struct r300_winsys_buffer *buffer;
+    struct r300_winsys_cs_buffer *cs_buffer;
 
     /* Registers carrying texture format data. */
     /* Only format-independent bits should be filled in. */
diff --git a/src/gallium/drivers/r300/r300_cs.h b/src/gallium/drivers/r300/r300_cs.h
index c194d6a1b08..ea29fc565b2 100644
--- a/src/gallium/drivers/r300/r300_cs.h
+++ b/src/gallium/drivers/r300/r300_cs.h
@@ -115,17 +115,17 @@
 
 #define OUT_CS_BUF_RELOC(bo, offset, rd, wd) do { \
     assert(bo); \
-    OUT_CS_RELOC(r300_buffer(bo)->buf, offset, rd, wd); \
+    OUT_CS_RELOC(r300_buffer(bo)->cs_buf, offset, rd, wd); \
 } while (0)
 
 #define OUT_CS_TEX_RELOC(tex, offset, rd, wd) do { \
     assert(tex); \
-    OUT_CS_RELOC(tex->buffer, offset, rd, wd); \
+    OUT_CS_RELOC(tex->cs_buffer, offset, rd, wd); \
 } while (0)
 
 #define OUT_CS_BUF_RELOC_NO_OFFSET(bo, rd, wd) do { \
     assert(bo); \
-    cs_winsys->cs_write_reloc(cs_copy, r300_buffer(bo)->buf, rd, wd); \
+    cs_winsys->cs_write_reloc(cs_copy, r300_buffer(bo)->cs_buf, rd, wd); \
     CS_DEBUG(cs_count -= 2;) \
 } while (0)
 
diff --git a/src/gallium/drivers/r300/r300_emit.c b/src/gallium/drivers/r300/r300_emit.c
index 3e6852b7798..31c7b38adfb 100644
--- a/src/gallium/drivers/r300/r300_emit.c
+++ b/src/gallium/drivers/r300/r300_emit.c
@@ -353,10 +353,10 @@ void r300_emit_aa_state(struct r300_context *r300, unsigned size, void *state)
 
     if (aa->dest) {
         OUT_CS_REG_SEQ(R300_RB3D_AARESOLVE_OFFSET, 1);
-        OUT_CS_RELOC(aa->dest->buffer, aa->dest->offset, 0, aa->dest->domain);
+        OUT_CS_RELOC(aa->dest->cs_buffer, aa->dest->offset, 0, aa->dest->domain);
 
         OUT_CS_REG_SEQ(R300_RB3D_AARESOLVE_PITCH, 1);
-        OUT_CS_RELOC(aa->dest->buffer, aa->dest->pitch, 0, aa->dest->domain);
+        OUT_CS_RELOC(aa->dest->cs_buffer, aa->dest->pitch, 0, aa->dest->domain);
     }
 
     OUT_CS_REG(R300_RB3D_AARESOLVE_CTL, aa->aaresolve_ctl);
@@ -387,10 +387,10 @@ void r300_emit_fb_state(struct r300_context* r300, unsigned size, void* state)
         surf = r300_surface(fb->cbufs[i]);
 
         OUT_CS_REG_SEQ(R300_RB3D_COLOROFFSET0 + (4 * i), 1);
-        OUT_CS_RELOC(surf->buffer, surf->offset, 0, surf->domain);
+        OUT_CS_RELOC(surf->cs_buffer, surf->offset, 0, surf->domain);
 
         OUT_CS_REG_SEQ(R300_RB3D_COLORPITCH0 + (4 * i), 1);
-        OUT_CS_RELOC(surf->buffer, surf->pitch, 0, surf->domain);
+        OUT_CS_RELOC(surf->cs_buffer, surf->pitch, 0, surf->domain);
     }
 
     /* Set up the ZB part of the CBZB clear. */
@@ -400,10 +400,10 @@ void r300_emit_fb_state(struct r300_context* r300, unsigned size, void* state)
         OUT_CS_REG(R300_ZB_FORMAT, surf->cbzb_format);
 
         OUT_CS_REG_SEQ(R300_ZB_DEPTHOFFSET, 1);
-        OUT_CS_RELOC(surf->buffer, surf->cbzb_midpoint_offset, 0, surf->domain);
+        OUT_CS_RELOC(surf->cs_buffer, surf->cbzb_midpoint_offset, 0, surf->domain);
 
         OUT_CS_REG_SEQ(R300_ZB_DEPTHPITCH, 1);
-        OUT_CS_RELOC(surf->buffer, surf->cbzb_pitch, 0, surf->domain);
+        OUT_CS_RELOC(surf->cs_buffer, surf->cbzb_pitch, 0, surf->domain);
 
         DBG(r300, DBG_CBZB,
             "CBZB clearing cbuf %08x %08x\n", surf->cbzb_format,
@@ -416,10 +416,10 @@ void r300_emit_fb_state(struct r300_context* r300, unsigned size, void* state)
         OUT_CS_REG(R300_ZB_FORMAT, surf->format);
 
         OUT_CS_REG_SEQ(R300_ZB_DEPTHOFFSET, 1);
-        OUT_CS_RELOC(surf->buffer, surf->offset, 0, surf->domain);
+        OUT_CS_RELOC(surf->cs_buffer, surf->offset, 0, surf->domain);
 
         OUT_CS_REG_SEQ(R300_ZB_DEPTHPITCH, 1);
-        OUT_CS_RELOC(surf->buffer, surf->pitch, 0, surf->domain);
+        OUT_CS_RELOC(surf->cs_buffer, surf->pitch, 0, surf->domain);
 
         if (can_hyperz) {
             uint32_t surf_pitch;
@@ -559,7 +559,7 @@ static void r300_emit_query_end_frag_pipes(struct r300_context *r300,
                                            struct r300_query *query)
 {
     struct r300_capabilities* caps = &r300->screen->caps;
-    struct r300_winsys_buffer *buf = r300->query_current->buffer;
+    struct r300_winsys_cs_buffer *buf = r300->query_current->cs_buffer;
     CS_LOCALS(r300);
 
     assert(caps->num_frag_pipes);
@@ -615,7 +615,7 @@ static void r300_emit_query_end_frag_pipes(struct r300_context *r300,
 static void rv530_emit_query_end_single_z(struct r300_context *r300,
                                           struct r300_query *query)
 {
-    struct r300_winsys_buffer *buf = r300->query_current->buffer;
+    struct r300_winsys_cs_buffer *buf = r300->query_current->cs_buffer;
     CS_LOCALS(r300);
 
     BEGIN_CS(8);
@@ -629,7 +629,7 @@ static void rv530_emit_query_end_single_z(struct r300_context *r300,
 static void rv530_emit_query_end_double_z(struct r300_context *r300,
                                           struct r300_query *query)
 {
-    struct r300_winsys_buffer *buf = r300->query_current->buffer;
+    struct r300_winsys_cs_buffer *buf = r300->query_current->cs_buffer;
     CS_LOCALS(r300);
 
     BEGIN_CS(14);
@@ -1188,14 +1188,14 @@ boolean r300_emit_buffer_validate(struct r300_context *r300,
     for (i = 0; i < fb->nr_cbufs; i++) {
         tex = r300_texture(fb->cbufs[i]->texture);
         assert(tex && tex->buffer && "cbuf is marked, but NULL!");
-        r300->rws->cs_add_buffer(r300->cs, tex->buffer, 0,
+        r300->rws->cs_add_buffer(r300->cs, tex->cs_buffer, 0,
                                  r300_surface(fb->cbufs[i])->domain);
     }
     /* ...depth buffer... */
     if (fb->zsbuf) {
         tex = r300_texture(fb->zsbuf->texture);
         assert(tex && tex->buffer && "zsbuf is marked, but NULL!");
-        r300->rws->cs_add_buffer(r300->cs, tex->buffer, 0,
+        r300->rws->cs_add_buffer(r300->cs, tex->cs_buffer, 0,
                                  r300_surface(fb->zsbuf)->domain);
     }
     /* ...textures... */
@@ -1205,28 +1205,28 @@ boolean r300_emit_buffer_validate(struct r300_context *r300,
         }
 
         tex = r300_texture(texstate->sampler_views[i]->base.texture);
-        r300->rws->cs_add_buffer(r300->cs, tex->buffer, tex->domain, 0);
+        r300->rws->cs_add_buffer(r300->cs, tex->cs_buffer, tex->domain, 0);
     }
     /* ...occlusion query buffer... */
     if (r300->query_current)
-        r300->rws->cs_add_buffer(r300->cs, r300->query_current->buffer,
+        r300->rws->cs_add_buffer(r300->cs, r300->query_current->cs_buffer,
                                  0, r300->query_current->domain);
     /* ...vertex buffer for SWTCL path... */
     if (r300->vbo)
-        r300->rws->cs_add_buffer(r300->cs, r300_buffer(r300->vbo)->buf,
+        r300->rws->cs_add_buffer(r300->cs, r300_buffer(r300->vbo)->cs_buf,
                                  r300_buffer(r300->vbo)->domain, 0);
     /* ...vertex buffers for HWTCL path... */
     if (do_validate_vertex_buffers) {
         for (i = 0; i < r300->velems->count; i++) {
             pbuf = vbuf[velem[i].vertex_buffer_index].buffer;
 
-            r300->rws->cs_add_buffer(r300->cs, r300_buffer(pbuf)->buf,
+            r300->rws->cs_add_buffer(r300->cs, r300_buffer(pbuf)->cs_buf,
                                      r300_buffer(pbuf)->domain, 0);
         }
     }
     /* ...and index buffer for HWTCL path. */
     if (index_buffer)
-        r300->rws->cs_add_buffer(r300->cs, r300_buffer(index_buffer)->buf,
+        r300->rws->cs_add_buffer(r300->cs, r300_buffer(index_buffer)->cs_buf,
                                  r300_buffer(index_buffer)->domain, 0);
 
     if (!r300->rws->cs_validate(r300->cs)) {
diff --git a/src/gallium/drivers/r300/r300_query.c b/src/gallium/drivers/r300/r300_query.c
index 5f34fcb2744..59cd1e7f794 100644
--- a/src/gallium/drivers/r300/r300_query.c
+++ b/src/gallium/drivers/r300/r300_query.c
@@ -60,6 +60,7 @@ static struct pipe_query *r300_create_query(struct pipe_context *pipe,
     q->buffer = r300->rws->buffer_create(r300->rws, q->buffer_size, 4096,
                                          PIPE_BIND_CUSTOM, PIPE_USAGE_STREAM,
                                          q->domain);
+    q->cs_buffer = r300->rws->buffer_get_cs_handle(r300->rws, q->buffer);
 
     return (struct pipe_query*)q;
 }
diff --git a/src/gallium/drivers/r300/r300_screen_buffer.c b/src/gallium/drivers/r300/r300_screen_buffer.c
index 98d36ad2729..9b1ee9e068a 100644
--- a/src/gallium/drivers/r300/r300_screen_buffer.c
+++ b/src/gallium/drivers/r300/r300_screen_buffer.c
@@ -43,7 +43,7 @@ unsigned r300_buffer_is_referenced(struct pipe_context *context,
     if (r300_buffer_is_user_buffer(buf))
  	return PIPE_UNREFERENCED;
 
-    if (r300->rws->cs_is_buffer_referenced(r300->cs, rbuf->buf, domain))
+    if (r300->rws->cs_is_buffer_referenced(r300->cs, rbuf->cs_buf, domain))
         return PIPE_REFERENCED_FOR_READ | PIPE_REFERENCED_FOR_WRITE;
 
     return PIPE_UNREFERENCED;
@@ -206,6 +206,9 @@ r300_buffer_transfer_map( struct pipe_context *pipe,
                                                    rbuf->b.b.bind,
                                                    rbuf->b.b.usage,
                                                    rbuf->domain);
+                rbuf->cs_buf =
+                    r300screen->rws->buffer_get_cs_handle(r300screen->rws,
+                                                          rbuf->buf);
 		break;
 	    }
 	}
@@ -310,6 +313,8 @@ struct pipe_resource *r300_buffer_create(struct pipe_screen *screen,
                                        rbuf->b.b.width0, alignment,
                                        rbuf->b.b.bind, rbuf->b.b.usage,
                                        rbuf->domain);
+    rbuf->cs_buf =
+        r300screen->rws->buffer_get_cs_handle(r300screen->rws, rbuf->buf);
 
     if (!rbuf->buf) {
         util_slab_free(&r300screen->pool_buffers, rbuf);
diff --git a/src/gallium/drivers/r300/r300_screen_buffer.h b/src/gallium/drivers/r300/r300_screen_buffer.h
index cafa9f96f20..a184ead3a35 100644
--- a/src/gallium/drivers/r300/r300_screen_buffer.h
+++ b/src/gallium/drivers/r300/r300_screen_buffer.h
@@ -51,6 +51,7 @@ struct r300_buffer
     uint32_t magic;
 
     struct r300_winsys_buffer *buf;
+    struct r300_winsys_cs_buffer *cs_buf;
 
     enum r300_buffer_domain domain;
 
@@ -86,11 +87,7 @@ unsigned r300_buffer_is_referenced(struct pipe_context *context,
 
 static INLINE struct r300_buffer *r300_buffer(struct pipe_resource *buffer)
 {
-    if (buffer) {
-	assert(((struct r300_buffer *)buffer)->magic == R300_BUFFER_MAGIC);
-	return (struct r300_buffer *)buffer;
-    }
-    return NULL;
+    return (struct r300_buffer *)buffer;
 }
 
 static INLINE boolean r300_buffer_is_user_buffer(struct pipe_resource *buffer)
diff --git a/src/gallium/drivers/r300/r300_state.c b/src/gallium/drivers/r300/r300_state.c
index 0f563703c06..d4e20635586 100644
--- a/src/gallium/drivers/r300/r300_state.c
+++ b/src/gallium/drivers/r300/r300_state.c
@@ -626,7 +626,7 @@ static void r300_tex_set_tiling_flags(struct r300_context *r300,
         /* Tiling determines how DRM treats the buffer data.
          * We must flush CS when changing it if the buffer is referenced. */
         if (r300->rws->cs_is_buffer_referenced(r300->cs,
-                                               tex->buffer, R300_REF_CS))
+                                               tex->cs_buffer, R300_REF_CS))
             r300->context.flush(&r300->context, 0, NULL);
 
         r300->rws->buffer_set_tiling(r300->rws, tex->buffer,
diff --git a/src/gallium/drivers/r300/r300_texture.c b/src/gallium/drivers/r300/r300_texture.c
index 4b7b3e03564..70fc5d96d83 100644
--- a/src/gallium/drivers/r300/r300_texture.c
+++ b/src/gallium/drivers/r300/r300_texture.c
@@ -675,7 +675,7 @@ static unsigned r300_texture_is_referenced(struct pipe_context *context,
     struct r300_texture *rtex = (struct r300_texture *)texture;
 
     if (r300->rws->cs_is_buffer_referenced(r300->cs,
-                                           rtex->buffer, R300_REF_CS))
+                                           rtex->cs_buffer, R300_REF_CS))
         return PIPE_REFERENCED_FOR_READ | PIPE_REFERENCED_FOR_WRITE;
 
     return PIPE_UNREFERENCED;
@@ -777,6 +777,8 @@ r300_texture_create_object(struct r300_screen *rscreen,
         }
     }
 
+    tex->cs_buffer = rws->buffer_get_cs_handle(rws, tex->buffer);
+
     rws->buffer_set_tiling(rws, tex->buffer,
             tex->desc.microtile, tex->desc.macrotile[0],
             tex->desc.stride_in_bytes[0]);
@@ -876,6 +878,7 @@ struct pipe_surface* r300_create_surface(struct pipe_context * ctx,
         surface->base.u.tex.last_layer = surf_tmpl->u.tex.last_layer;
 
         surface->buffer = tex->buffer;
+        surface->cs_buffer = tex->cs_buffer;
 
         /* Prefer VRAM if there are multiple domains to choose from. */
         surface->domain = tex->domain;
diff --git a/src/gallium/drivers/r300/r300_transfer.c b/src/gallium/drivers/r300/r300_transfer.c
index 755aff8380c..3b95af79bcf 100644
--- a/src/gallium/drivers/r300/r300_transfer.c
+++ b/src/gallium/drivers/r300/r300_transfer.c
@@ -90,13 +90,13 @@ r300_texture_get_transfer(struct pipe_context *ctx,
 
     referenced_cs =
         r300->rws->cs_is_buffer_referenced(r300->cs,
-                                           tex->buffer, R300_REF_CS);
+                                           tex->cs_buffer, R300_REF_CS);
     if (referenced_cs) {
         referenced_hw = TRUE;
     } else {
         referenced_hw =
             r300->rws->cs_is_buffer_referenced(r300->cs,
-                                               tex->buffer, R300_REF_HW);
+                                               tex->cs_buffer, R300_REF_HW);
     }
 
     blittable = ctx->screen->is_format_supported(
diff --git a/src/gallium/drivers/r300/r300_winsys.h b/src/gallium/drivers/r300/r300_winsys.h
index 4597332399a..c45888dbf38 100644
--- a/src/gallium/drivers/r300/r300_winsys.h
+++ b/src/gallium/drivers/r300/r300_winsys.h
@@ -36,7 +36,8 @@
 struct winsys_handle;
 struct r300_winsys_screen;
 
-struct r300_winsys_buffer;
+struct r300_winsys_buffer;      /* for map/unmap etc. */
+struct r300_winsys_cs_buffer;   /* for write_reloc etc. */
 
 struct r300_winsys_cs {
     uint32_t *ptr;      /* Pointer to the beginning of the CS. */
@@ -102,6 +103,10 @@ struct r300_winsys_screen {
                                                 unsigned usage,
                                                 enum r300_buffer_domain domain);
 
+    struct r300_winsys_cs_buffer *(*buffer_get_cs_handle)(
+            struct r300_winsys_screen *ws,
+            struct r300_winsys_buffer *buf);
+
     /**
      * Reference a buffer object (assign with reference counting).
      *
@@ -242,7 +247,7 @@ struct r300_winsys_screen {
      *                  of the R300_DOMAIN_* flags.
      */
     void (*cs_add_buffer)(struct r300_winsys_cs *cs,
-                          struct r300_winsys_buffer *buf,
+                          struct r300_winsys_cs_buffer *buf,
                           enum r300_buffer_domain rd,
                           enum r300_buffer_domain wd);
 
@@ -263,7 +268,7 @@ struct r300_winsys_screen {
      * \param wd        A write domain containing a bitmask of the R300_DOMAIN_* flags.
      */
     void (*cs_write_reloc)(struct r300_winsys_cs *cs,
-                           struct r300_winsys_buffer *buf,
+                           struct r300_winsys_cs_buffer *buf,
                            enum r300_buffer_domain rd,
                            enum r300_buffer_domain wd);
 
@@ -303,7 +308,7 @@ struct r300_winsys_screen {
      * \param domain    A bitmask of the R300_REF_* enums.
      */
     boolean (*cs_is_buffer_referenced)(struct r300_winsys_cs *cs,
-                                       struct r300_winsys_buffer *buf,
+                                       struct r300_winsys_cs_buffer *buf,
                                        enum r300_reference_domain domain);
 };
 
diff --git a/src/gallium/winsys/radeon/drm/radeon_buffer.h b/src/gallium/winsys/radeon/drm/radeon_buffer.h
index a8137d85e83..59edbcadbc9 100644
--- a/src/gallium/winsys/radeon/drm/radeon_buffer.h
+++ b/src/gallium/winsys/radeon/drm/radeon_buffer.h
@@ -63,12 +63,12 @@ struct pb_manager *
 radeon_drm_bufmgr_create(struct radeon_libdrm_winsys *rws);
 
 void radeon_drm_bufmgr_add_buffer(struct r300_winsys_cs *cs,
-                                  struct r300_winsys_buffer *buf,
+                                  struct r300_winsys_cs_buffer *buf,
                                   enum r300_buffer_domain rd,
                                   enum r300_buffer_domain wd);
 
 void radeon_drm_bufmgr_write_reloc(struct r300_winsys_cs *cs,
-                                   struct r300_winsys_buffer *buf,
+                                   struct r300_winsys_cs_buffer *buf,
 				   enum r300_buffer_domain rd,
                                    enum r300_buffer_domain wd);
 
@@ -92,7 +92,7 @@ boolean radeon_drm_bufmgr_get_handle(struct pb_buffer *_buf,
 				     struct winsys_handle *whandle);
 
 boolean radeon_drm_bufmgr_is_buffer_referenced(struct r300_winsys_cs *cs,
-                                               struct r300_winsys_buffer *buf,
+                                               struct r300_winsys_cs_buffer *buf,
                                                enum r300_reference_domain domain);
 
 void radeon_drm_bufmgr_wait(struct r300_winsys_screen *ws,
@@ -106,4 +106,8 @@ void *radeon_drm_buffer_map(struct r300_winsys_screen *ws,
 void radeon_drm_buffer_unmap(struct r300_winsys_screen *ws,
                              struct r300_winsys_buffer *buf);
 
+struct r300_winsys_cs_buffer *radeon_drm_get_cs_handle(
+        struct r300_winsys_screen *rws,
+        struct r300_winsys_buffer *_buf);
+
 #endif
diff --git a/src/gallium/winsys/radeon/drm/radeon_drm_buffer.c b/src/gallium/winsys/radeon/drm/radeon_drm_buffer.c
index 78723948d41..294d4fac7cd 100644
--- a/src/gallium/winsys/radeon/drm/radeon_drm_buffer.c
+++ b/src/gallium/winsys/radeon/drm/radeon_drm_buffer.c
@@ -477,54 +477,63 @@ static uint32_t get_gem_domain(enum r300_buffer_domain domain)
 }
 
 void radeon_drm_bufmgr_add_buffer(struct r300_winsys_cs *rcs,
-                                  struct r300_winsys_buffer *_buf,
+                                  struct r300_winsys_cs_buffer *_buf,
                                   enum r300_buffer_domain rd,
                                   enum r300_buffer_domain wd)
 {
     struct radeon_libdrm_cs *cs = radeon_libdrm_cs(rcs);
-    struct radeon_drm_buffer *buf = get_drm_buffer(radeon_pb_buffer(_buf));
+    struct radeon_bo *bo = (struct radeon_bo*)_buf;
     uint32_t gem_rd = get_gem_domain(rd);
     uint32_t gem_wd = get_gem_domain(wd);
 
-    radeon_cs_space_add_persistent_bo(cs->cs, buf->bo, gem_rd, gem_wd);
+    radeon_cs_space_add_persistent_bo(cs->cs, bo, gem_rd, gem_wd);
 }
 
 void radeon_drm_bufmgr_write_reloc(struct r300_winsys_cs *rcs,
-                                   struct r300_winsys_buffer *_buf,
+                                   struct r300_winsys_cs_buffer *_buf,
 				   enum r300_buffer_domain rd,
                                    enum r300_buffer_domain wd)
 {
     struct radeon_libdrm_cs *cs = radeon_libdrm_cs(rcs);
-    struct radeon_drm_buffer *buf = get_drm_buffer(radeon_pb_buffer(_buf));
+    struct radeon_bo *bo = (struct radeon_bo*)_buf;
     int retval;
     uint32_t gem_rd = get_gem_domain(rd);
     uint32_t gem_wd = get_gem_domain(wd);
 
     cs->cs->cdw = cs->base.cdw;
-    retval = radeon_cs_write_reloc(cs->cs, buf->bo, gem_rd, gem_wd, 0);
+    retval = radeon_cs_write_reloc(cs->cs, bo, gem_rd, gem_wd, 0);
     cs->base.cdw = cs->cs->cdw;
     if (retval) {
         fprintf(stderr, "radeon: Relocation of %p (%d, %d, %d) failed!\n",
-                buf, gem_rd, gem_wd, 0);
+                bo, gem_rd, gem_wd, 0);
     }
 }
 
+struct r300_winsys_cs_buffer *radeon_drm_get_cs_handle(
+        struct r300_winsys_screen *rws,
+        struct r300_winsys_buffer *_buf)
+{
+    /* return pure radeon_bo. */
+    return (struct r300_winsys_cs_buffer*)
+            get_drm_buffer(radeon_pb_buffer(_buf))->bo;
+}
+
 boolean radeon_drm_bufmgr_is_buffer_referenced(struct r300_winsys_cs *rcs,
-                                               struct r300_winsys_buffer *_buf,
+                                               struct r300_winsys_cs_buffer *_buf,
                                                enum r300_reference_domain domain)
 {
     struct radeon_libdrm_cs *cs = radeon_libdrm_cs(rcs);
-    struct radeon_drm_buffer *buf = get_drm_buffer(radeon_pb_buffer(_buf));
+    struct radeon_bo *bo = (struct radeon_bo*)_buf;
     uint32_t tmp;
 
     if (domain & R300_REF_CS) {
-        if (radeon_bo_is_referenced_by_cs(buf->bo, cs->cs)) {
+        if (radeon_bo_is_referenced_by_cs(bo, cs->cs)) {
             return TRUE;
         }
     }
 
     if (domain & R300_REF_HW) {
-        if (radeon_bo_is_busy(buf->bo, &tmp)) {
+        if (radeon_bo_is_busy(bo, &tmp)) {
             return TRUE;
         }
     }
diff --git a/src/gallium/winsys/radeon/drm/radeon_r300.c b/src/gallium/winsys/radeon/drm/radeon_r300.c
index 3b3e2c2f281..412f3adca46 100644
--- a/src/gallium/winsys/radeon/drm/radeon_r300.c
+++ b/src/gallium/winsys/radeon/drm/radeon_r300.c
@@ -286,6 +286,7 @@ boolean radeon_setup_winsys(int fd, struct radeon_libdrm_winsys* ws)
     ws->base.get_value = radeon_get_value;
 
     ws->base.buffer_create = radeon_r300_winsys_buffer_create;
+    ws->base.buffer_get_cs_handle = radeon_drm_get_cs_handle;
     ws->base.buffer_set_tiling = radeon_drm_bufmgr_set_tiling;
     ws->base.buffer_get_tiling = radeon_drm_bufmgr_get_tiling;
     ws->base.buffer_map = radeon_drm_buffer_map;