i965g: convert read/write domain pairs into single usage value

Easier to understand what's going on in the driver sources, convert
stereotype usage values back to GEM read/write domain flags in the
winsys.

18 files changed, 104 insertions, 76 deletions

diff --git a/src/gallium/drivers/i965/brw_batchbuffer.c b/src/gallium/drivers/i965/brw_batchbuffer.c
index 72650cdb5d5..fd6b34cb8a8 100644
--- a/src/gallium/drivers/i965/brw_batchbuffer.c
+++ b/src/gallium/drivers/i965/brw_batchbuffer.c
@@ -168,9 +168,9 @@ _brw_batchbuffer_flush(struct brw_batchbuffer *batch,
  */
 enum pipe_error
 brw_batchbuffer_emit_reloc(struct brw_batchbuffer *batch,
-                             struct brw_winsys_buffer *buffer,
-                             uint32_t read_domains, uint32_t write_domain,
-			     uint32_t delta)
+			   struct brw_winsys_buffer *buffer,
+			   uint32_t usage,
+			   uint32_t delta)
 {
    int ret;
 
@@ -182,8 +182,7 @@ brw_batchbuffer_emit_reloc(struct brw_batchbuffer *batch,
    }
 
    ret = batch->sws->bo_emit_reloc(batch->buf,
-				   read_domains,
-				   write_domain,
+				   usage,
 				   delta, 
 				   batch->ptr - batch->map,
 				   buffer);
diff --git a/src/gallium/drivers/i965/brw_batchbuffer.h b/src/gallium/drivers/i965/brw_batchbuffer.h
index d687b79f930..b7186b3757d 100644
--- a/src/gallium/drivers/i965/brw_batchbuffer.h
+++ b/src/gallium/drivers/i965/brw_batchbuffer.h
@@ -77,8 +77,7 @@ int brw_batchbuffer_data(struct brw_batchbuffer *batch,
 
 int brw_batchbuffer_emit_reloc(struct brw_batchbuffer *batch,
 			       struct brw_winsys_buffer *buffer,
-			       uint32_t read_domains,
-			       uint32_t write_domain,
+			       enum brw_buffer_usage usage,
 			       uint32_t offset);
 
 /* Inline functions - might actually be better off with these
@@ -125,10 +124,10 @@ brw_batchbuffer_require_space(struct brw_batchbuffer *batch,
 
 #define OUT_BATCH(d) brw_batchbuffer_emit_dword(brw->batch, d)
 
-#define OUT_RELOC(buf, read_domains, write_domain, delta) do {		\
+#define OUT_RELOC(buf, usage, delta) do {				\
       assert((unsigned) (delta) < buf->size);				\
       brw_batchbuffer_emit_reloc(brw->batch, buf,			\
-				 read_domains, write_domain, delta);	\
+				 usage, delta);				\
    } while (0)
 
 #ifdef DEBUG
diff --git a/src/gallium/drivers/i965/brw_cc.c b/src/gallium/drivers/i965/brw_cc.c
index c6267e1c606..20967f01911 100644
--- a/src/gallium/drivers/i965/brw_cc.c
+++ b/src/gallium/drivers/i965/brw_cc.c
@@ -151,7 +151,7 @@ cc_unit_create_from_key(struct brw_context *brw, struct brw_cc_unit_key *key)
 
    /* Emit CC viewport relocation */
    brw->sws->bo_emit_reloc(bo,
-			   I915_GEM_DOMAIN_INSTRUCTION, 0,
+			   BRW_USAGE_STATE,
 			   0,
 			   offsetof(struct brw_cc_unit_state, cc4),
 			   brw->cc.vp_bo);
diff --git a/src/gallium/drivers/i965/brw_clip_state.c b/src/gallium/drivers/i965/brw_clip_state.c
index 8be53e4bfb4..6f8309fea92 100644
--- a/src/gallium/drivers/i965/brw_clip_state.c
+++ b/src/gallium/drivers/i965/brw_clip_state.c
@@ -150,7 +150,7 @@ clip_unit_create_from_key(struct brw_context *brw,
    /* Emit clip program relocation */
    assert(brw->clip.prog_bo);
    brw->sws->bo_emit_reloc(bo,
-			   I915_GEM_DOMAIN_INSTRUCTION, 0,
+			   BRW_USAGE_STATE,
 			   clip.thread0.grf_reg_count << 1,
 			   offsetof(struct brw_clip_unit_state, thread0),
 			   brw->clip.prog_bo);
diff --git a/src/gallium/drivers/i965/brw_curbe.c b/src/gallium/drivers/i965/brw_curbe.c
index ed5b250f828..3910174bda5 100644
--- a/src/gallium/drivers/i965/brw_curbe.c
+++ b/src/gallium/drivers/i965/brw_curbe.c
@@ -323,7 +323,7 @@ static int emit_curbe_buffer(struct brw_context *brw)
    } else {
       OUT_BATCH((CMD_CONST_BUFFER << 16) | (1 << 8) | (2 - 2));
       OUT_RELOC(brw->curbe.curbe_bo,
-		I915_GEM_DOMAIN_INSTRUCTION, 0,
+		BRW_USAGE_STATE,
 		(sz - 1) + brw->curbe.curbe_offset);
    }
    ADVANCE_BATCH();
diff --git a/src/gallium/drivers/i965/brw_draw_upload.c b/src/gallium/drivers/i965/brw_draw_upload.c
index 040d8ca93ad..f0b7c741c0a 100644
--- a/src/gallium/drivers/i965/brw_draw_upload.c
+++ b/src/gallium/drivers/i965/brw_draw_upload.c
@@ -300,11 +300,11 @@ static int brw_emit_vertex_buffers( struct brw_context *brw )
 		BRW_VB0_ACCESS_VERTEXDATA |
 		(brw->vb.vb[i].stride << BRW_VB0_PITCH_SHIFT));
       OUT_RELOC(brw->vb.vb[i].bo,
-		I915_GEM_DOMAIN_VERTEX, 0,
+		BRW_USAGE_VERTEX,
 		brw->vb.vb[i].offset);
       if (BRW_IS_IGDNG(brw)) {
 	 OUT_RELOC(brw->vb.vb[i].bo,
-		   I915_GEM_DOMAIN_VERTEX, 0,
+		   BRW_USAGE_VERTEX,
 		   brw->vb.vb[i].bo->size - 1);
       } else
 	 OUT_BATCH(brw->vb.vb[i].stride ? brw->vb.vb[i].vertex_count : 0);
@@ -527,10 +527,10 @@ static int brw_emit_index_buffer(struct brw_context *brw)
       BEGIN_BATCH(4, IGNORE_CLIPRECTS);
       OUT_BATCH( ib.header.dword );
       OUT_RELOC(brw->ib.bo,
-		I915_GEM_DOMAIN_VERTEX, 0,
+		BRW_USAGE_VERTEX,
 		brw->ib.offset);
       OUT_RELOC(brw->ib.bo,
-		I915_GEM_DOMAIN_VERTEX, 0,
+		BRW_USAGE_VERTEX,
 		brw->ib.offset + brw->ib.size - 1);
       OUT_BATCH( 0 );
       ADVANCE_BATCH();
diff --git a/src/gallium/drivers/i965/brw_gs_state.c b/src/gallium/drivers/i965/brw_gs_state.c
index 9046969394b..f27f886a651 100644
--- a/src/gallium/drivers/i965/brw_gs_state.c
+++ b/src/gallium/drivers/i965/brw_gs_state.c
@@ -113,7 +113,7 @@ gs_unit_create_from_key(struct brw_context *brw, struct brw_gs_unit_key *key)
    if (key->prog_active) {
       /* Emit GS program relocation */
       brw->sws->bo_emit_reloc(bo,
-			      I915_GEM_DOMAIN_INSTRUCTION, 0,
+			      BRW_USAGE_STATE,
 			      gs.thread0.grf_reg_count << 1,
 			      offsetof(struct brw_gs_unit_state, thread0),
 			      brw->gs.prog_bo);
diff --git a/src/gallium/drivers/i965/brw_misc_state.c b/src/gallium/drivers/i965/brw_misc_state.c
index 06b9a2d2dfa..e786ea11000 100644
--- a/src/gallium/drivers/i965/brw_misc_state.c
+++ b/src/gallium/drivers/i965/brw_misc_state.c
@@ -111,7 +111,7 @@ static int upload_binding_table_pointers(struct brw_context *brw)
    OUT_BATCH(CMD_BINDING_TABLE_PTRS << 16 | (6 - 2));
    if (brw->vs.bind_bo != NULL)
       OUT_RELOC(brw->vs.bind_bo, 
-		I915_GEM_DOMAIN_SAMPLER, 0,
+		BRW_USAGE_SAMPLER,
 		0); /* vs */
    else
       OUT_BATCH(0);
@@ -119,7 +119,7 @@ static int upload_binding_table_pointers(struct brw_context *brw)
    OUT_BATCH(0); /* clip */
    OUT_BATCH(0); /* sf */
    OUT_RELOC(brw->wm.bind_bo,
-	     I915_GEM_DOMAIN_SAMPLER, 0,
+	     BRW_USAGE_SAMPLER,
 	     0); /* wm/ps */
    ADVANCE_BATCH();
    return 0;
@@ -147,25 +147,25 @@ static int upload_pipelined_state_pointers(struct brw_context *brw )
    BEGIN_BATCH(7, IGNORE_CLIPRECTS);
    OUT_BATCH(CMD_PIPELINED_STATE_POINTERS << 16 | (7 - 2));
    OUT_RELOC(brw->vs.state_bo, 
-	     I915_GEM_DOMAIN_INSTRUCTION, 0,
+	     BRW_USAGE_STATE,
 	     0);
    if (brw->gs.prog_active)
       OUT_RELOC(brw->gs.state_bo, 
-		I915_GEM_DOMAIN_INSTRUCTION, 0,
+		BRW_USAGE_STATE,
 		1);
    else
       OUT_BATCH(0);
    OUT_RELOC(brw->clip.state_bo, 
-	     I915_GEM_DOMAIN_INSTRUCTION, 0,
+	     BRW_USAGE_STATE,
 	     1);
    OUT_RELOC(brw->sf.state_bo,
-	     I915_GEM_DOMAIN_INSTRUCTION, 0,
+	     BRW_USAGE_STATE,
 	     0);
    OUT_RELOC(brw->wm.state_bo,
-	     I915_GEM_DOMAIN_INSTRUCTION, 0,
+	     BRW_USAGE_STATE,
 	     0);
    OUT_RELOC(brw->cc.state_bo,
-	     I915_GEM_DOMAIN_INSTRUCTION, 0,
+	     BRW_USAGE_STATE,
 	     0);
    ADVANCE_BATCH();
 
@@ -288,7 +288,7 @@ static int emit_depthbuffer(struct brw_context *brw)
 		((surface->layout != PIPE_SURFACE_LAYOUT_LINEAR) << 27) |
 		(BRW_SURFACE_2D << 29));
       OUT_RELOC(bo,
-		I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER,
+		BRW_USAGE_DEPTH_BUFFER,
 		surface->offset);
       OUT_BATCH((BRW_SURFACE_MIPMAPLAYOUT_BELOW << 1) |
 		((pitch - 1) << 6) |
diff --git a/src/gallium/drivers/i965/brw_pipe_query.c b/src/gallium/drivers/i965/brw_pipe_query.c
index 18a9b71af07..1fe2f4da4f5 100644
--- a/src/gallium/drivers/i965/brw_pipe_query.c
+++ b/src/gallium/drivers/i965/brw_pipe_query.c
@@ -193,7 +193,7 @@ brw_emit_query_begin(struct brw_context *brw)
     * to pick up the results.
     */
    OUT_RELOC(brw->query.bo,
-	     I915_GEM_DOMAIN_INSTRUCTION, I915_GEM_DOMAIN_INSTRUCTION,
+	     BRW_USAGE_QUERY_RESULT,
 	     PIPE_CONTROL_GLOBAL_GTT_WRITE |
 	     ((brw->query.index * 2) * sizeof(uint64_t)));
    OUT_BATCH(0);
@@ -234,7 +234,7 @@ brw_emit_query_end(struct brw_context *brw)
 	     PIPE_CONTROL_DEPTH_STALL |
 	     PIPE_CONTROL_WRITE_DEPTH_COUNT);
    OUT_RELOC(brw->query.bo,
-	     I915_GEM_DOMAIN_INSTRUCTION, I915_GEM_DOMAIN_INSTRUCTION,
+	     BRW_USAGE_QUERY_RESULT,
 	     PIPE_CONTROL_GLOBAL_GTT_WRITE |
 	     ((brw->query.index * 2 + 1) * sizeof(uint64_t)));
    OUT_BATCH(0);
diff --git a/src/gallium/drivers/i965/brw_sf_state.c b/src/gallium/drivers/i965/brw_sf_state.c
index 4ab5709d533..31343ff2459 100644
--- a/src/gallium/drivers/i965/brw_sf_state.c
+++ b/src/gallium/drivers/i965/brw_sf_state.c
@@ -284,14 +284,14 @@ sf_unit_create_from_key(struct brw_context *brw, struct brw_sf_unit_key *key,
     */
    /* Emit SF program relocation */
    brw->sws->bo_emit_reloc(bo,
-			   I915_GEM_DOMAIN_INSTRUCTION, 0,
+			   BRW_USAGE_STATE,
 			   sf.thread0.grf_reg_count << 1,
 			   offsetof(struct brw_sf_unit_state, thread0),
 			   brw->sf.prog_bo);
 
    /* Emit SF viewport relocation */
    brw->sws->bo_emit_reloc(bo,
-			   I915_GEM_DOMAIN_INSTRUCTION, 0,
+			   BRW_USAGE_STATE,
 			   sf.sf5.front_winding | (sf.sf5.viewport_transform << 1),
 			   offsetof(struct brw_sf_unit_state, sf5),
 			   brw->sf.vp_bo);
diff --git a/src/gallium/drivers/i965/brw_vs_state.c b/src/gallium/drivers/i965/brw_vs_state.c
index 6a2395dd967..26d5d005faa 100644
--- a/src/gallium/drivers/i965/brw_vs_state.c
+++ b/src/gallium/drivers/i965/brw_vs_state.c
@@ -149,7 +149,7 @@ vs_unit_create_from_key(struct brw_context *brw, struct brw_vs_unit_key *key)
 
    /* Emit VS program relocation */
    brw->sws->bo_emit_reloc(bo,
-			   I915_GEM_DOMAIN_INSTRUCTION, 0,
+			   BRW_USAGE_STATE,
 			   vs.thread0.grf_reg_count << 1,
 			   offsetof(struct brw_vs_unit_state, thread0),
 			   brw->vs.prog_bo);
diff --git a/src/gallium/drivers/i965/brw_vs_surface_state.c b/src/gallium/drivers/i965/brw_vs_surface_state.c
index 9a9d47a8a3e..32fb9b2a8b9 100644
--- a/src/gallium/drivers/i965/brw_vs_surface_state.c
+++ b/src/gallium/drivers/i965/brw_vs_surface_state.c
@@ -170,7 +170,7 @@ brw_vs_get_binding_table(struct brw_context *brw)
 	     */
 	    drm_intel_bo_emit_reloc(bind_bo, i * 4,
 				    brw->vs.surf_bo[i], 0,
-				    I915_GEM_DOMAIN_INSTRUCTION, 0);
+				    BRW_USAGE_STATE);
 	 }
       }
 
diff --git a/src/gallium/drivers/i965/brw_winsys.h b/src/gallium/drivers/i965/brw_winsys.h
index d19cd5d248c..d0bd97d9946 100644
--- a/src/gallium/drivers/i965/brw_winsys.h
+++ b/src/gallium/drivers/i965/brw_winsys.h
@@ -43,25 +43,22 @@ struct brw_winsys_buffer {
    unsigned size;
 };
 
+/* Describe the usage of a particular buffer in a relocation.  The DRM
+ * winsys will translate these back to GEM read/write domain flags.
+ */
 enum brw_buffer_usage {
-   I915_GEM_DOMAIN_RENDER,
-   I915_GEM_DOMAIN_SAMPLER,
-   I915_GEM_DOMAIN_VERTEX,
-   I915_GEM_DOMAIN_INSTRUCTION,
-
-
-   /* XXX: migrate from domains to explicit usage cases, eg below:
-    */
-
-   /* use on textures */
-   BRW_USAGE_RENDER    = 0x01,
-   BRW_USAGE_SAMPLER   = 0x02,
-   BRW_USAGE_2D_TARGET = 0x04,
-   BRW_USAGE_2D_SOURCE = 0x08,
-   /* use on vertex */
-   BRW_USAGE_VERTEX    = 0x10,
+   BRW_USAGE_STATE,		/* INSTRUCTION, 0 */
+   BRW_USAGE_QUERY_RESULT,	/* INSTRUCTION, INSTRUCTION */
+   BRW_USAGE_RENDER_TARGET,	/* RENDER,      0 */
+   BRW_USAGE_DEPTH_BUFFER,	/* RENDER,      RENDER */
+   BRW_USAGE_SAMPLER,		/* SAMPLER,     0 */
+   BRW_USAGE_VERTEX,		/* VERTEX,      0 */
+   BRW_USAGE_SCRATCH,		/* 0,           0 */
 };
 
+/* Should be possible to validate usages above against buffer creation
+ * types, below:
+ */
 enum brw_buffer_type
 {
    BRW_BUFFER_TYPE_TEXTURE,
@@ -70,10 +67,9 @@ enum brw_buffer_type
    BRW_BUFFER_TYPE_CURBE,
    BRW_BUFFER_TYPE_QUERY,
    BRW_BUFFER_TYPE_SHADER_CONSTANTS,
-   BRW_BUFFER_TYPE_WM_SCRATCH,
+   BRW_BUFFER_TYPE_SHADER_SCRATCH,
    BRW_BUFFER_TYPE_BATCH,
    BRW_BUFFER_TYPE_STATE_CACHE,
-   
    BRW_BUFFER_TYPE_MAX		/* Count of possible values */
 };
 
@@ -98,12 +94,12 @@ struct brw_winsys_screen {
    void (*bo_reference)( struct brw_winsys_buffer *buffer );
    void (*bo_unreference)( struct brw_winsys_buffer *buffer );
 
-   /* XXX: parameter names!!
+   /* delta -- added to b2->offset, and written into buffer
+    * offset -- location above value is written to within buffer
     */
    int (*bo_emit_reloc)( struct brw_winsys_buffer *buffer,
-			 unsigned domain,
-			 unsigned a,
-			 unsigned b,
+			 enum brw_buffer_usage usage,
+			 unsigned delta,
 			 unsigned offset,
 			 struct brw_winsys_buffer *b2);
 
diff --git a/src/gallium/drivers/i965/brw_wm_constant_buffer.c b/src/gallium/drivers/i965/brw_wm_constant_buffer.c
index 7d2533b1048..50ecef29a41 100644
--- a/src/gallium/drivers/i965/brw_wm_constant_buffer.c
+++ b/src/gallium/drivers/i965/brw_wm_constant_buffer.c
@@ -37,7 +37,7 @@ brw_create_constant_surface( struct brw_context *brw,
    if (key->bo) {
       /* Emit relocation to surface contents */
       brw->sws->bo_emit_reloc(bo,
-			      I915_GEM_DOMAIN_SAMPLER, 0,
+			      BRW_USAGE_SAMPLER,
 			      0,
 			      offsetof(struct brw_surface_state, ss1),
 			      key->bo);
diff --git a/src/gallium/drivers/i965/brw_wm_sampler_state.c b/src/gallium/drivers/i965/brw_wm_sampler_state.c
index d43968c85ac..2909dd38765 100644
--- a/src/gallium/drivers/i965/brw_wm_sampler_state.c
+++ b/src/gallium/drivers/i965/brw_wm_sampler_state.c
@@ -182,7 +182,7 @@ static int upload_wm_samplers( struct brw_context *brw )
       /* Emit SDC relocations */
       for (i = 0; i < key.sampler_count; i++) {
 	 brw->sws->bo_emit_reloc(brw->wm.sampler_bo,
-				 I915_GEM_DOMAIN_SAMPLER, 0,
+				 BRW_USAGE_SAMPLER,
 				 0,
 				 i * sizeof(struct brw_sampler_state) +
 				 offsetof(struct brw_sampler_state, ss2),
diff --git a/src/gallium/drivers/i965/brw_wm_state.c b/src/gallium/drivers/i965/brw_wm_state.c
index 5cfa8fe2d19..ccbb647bcd0 100644
--- a/src/gallium/drivers/i965/brw_wm_state.c
+++ b/src/gallium/drivers/i965/brw_wm_state.c
@@ -230,27 +230,27 @@ wm_unit_create_from_key(struct brw_context *brw, struct brw_wm_unit_key *key,
 
    /* Emit WM program relocation */
    brw->sws->bo_emit_reloc(bo,
-		     I915_GEM_DOMAIN_INSTRUCTION, 0,
-		     wm.thread0.grf_reg_count << 1,
-		     offsetof(struct brw_wm_unit_state, thread0),
-		     brw->wm.prog_bo);
+			   BRW_USAGE_STATE,
+			   wm.thread0.grf_reg_count << 1,
+			   offsetof(struct brw_wm_unit_state, thread0),
+			   brw->wm.prog_bo);
 
    /* Emit scratch space relocation */
    if (key->total_scratch != 0) {
       brw->sws->bo_emit_reloc(bo,
-			0, 0,
-			wm.thread2.per_thread_scratch_space,
-			offsetof(struct brw_wm_unit_state, thread2),
-			brw->wm.scratch_bo);
+			      BRW_USAGE_SCRATCH,
+			      wm.thread2.per_thread_scratch_space,
+			      offsetof(struct brw_wm_unit_state, thread2),
+			      brw->wm.scratch_bo);
    }
 
    /* Emit sampler state relocation */
    if (key->sampler_count != 0) {
       brw->sws->bo_emit_reloc(bo,
-			I915_GEM_DOMAIN_INSTRUCTION, 0,
-			wm.wm4.stats_enable | (wm.wm4.sampler_count << 2),
-			offsetof(struct brw_wm_unit_state, wm4),
-			brw->wm.sampler_bo);
+			      BRW_USAGE_STATE,
+			      wm.wm4.stats_enable | (wm.wm4.sampler_count << 2),
+			      offsetof(struct brw_wm_unit_state, wm4),
+			      brw->wm.sampler_bo);
    }
 
    return bo;
@@ -277,7 +277,7 @@ static int upload_wm_unit( struct brw_context *brw )
       }
       if (brw->wm.scratch_bo == NULL) {
 	 brw->wm.scratch_bo = brw->sws->bo_alloc(brw->sws,
-						 BRW_BUFFER_TYPE_WM_SCRATCH,
+						 BRW_BUFFER_TYPE_SHADER_SCRATCH,
 						 total,
 						 4096);
       }
diff --git a/src/gallium/drivers/i965/brw_wm_surface_state.c b/src/gallium/drivers/i965/brw_wm_surface_state.c
index f55a6c4af2e..e5a0ed7d611 100644
--- a/src/gallium/drivers/i965/brw_wm_surface_state.c
+++ b/src/gallium/drivers/i965/brw_wm_surface_state.c
@@ -60,7 +60,7 @@ brw_update_texture_surface( struct brw_context *brw,
       
       /* Emit relocation to surface contents */
       brw->sws->bo_emit_reloc(brw->wm.surf_bo[surf],
-			      I915_GEM_DOMAIN_SAMPLER, 0,
+			      BRW_USAGE_SAMPLER,
 			      0,
 			      offsetof(struct brw_surface_state, ss1),
 			      tex->bo);
@@ -117,7 +117,7 @@ brw_update_renderbuffer_surface(struct brw_context *brw,
       /* XXX: we will only be rendering to this surface:
        */
       brw->sws->bo_emit_reloc(brw->wm.surf_bo[unit],
-			      I915_GEM_DOMAIN_RENDER, 0, 
+			      BRW_USAGE_RENDER_TARGET,
 			      ss.ss1.base_addr - surface->bo->offset[0], /* XXX */
 			      offsetof(struct brw_surface_state, ss1),
 			      surface->bo);
@@ -161,7 +161,7 @@ brw_wm_get_binding_table(struct brw_context *brw)
       /* Emit binding table relocations to surface state */
       for (i = 0; i < brw->wm.nr_surfaces; i++) {
 	 brw->sws->bo_emit_reloc(bind_bo,
-				 I915_GEM_DOMAIN_INSTRUCTION, 0,
+				 BRW_USAGE_STATE,
 				 0,
 				 i * sizeof(GLuint),
 				 brw->wm.surf_bo[i]);
diff --git a/src/gallium/winsys/drm/i965/gem/i965_drm_buffer.c b/src/gallium/winsys/drm/i965/gem/i965_drm_buffer.c
index 5dbfd2e6b0d..61717d2942d 100644
--- a/src/gallium/winsys/drm/i965/gem/i965_drm_buffer.c
+++ b/src/gallium/winsys/drm/i965/gem/i965_drm_buffer.c
@@ -93,17 +93,51 @@ i965_libdrm_bo_unreference( struct brw_winsys_buffer *buffer )
     */
 static int 
 i965_libdrm_bo_emit_reloc( struct brw_winsys_buffer *buffer,
-			   unsigned domain,
-			   unsigned a,
-			   unsigned b,
+			   enum brw_buffer_usage usage,
+			   unsigned delta,
 			   unsigned offset,
 			   struct brw_winsys_buffer *buffer2)
 {
    struct i965_libdrm_buffer *buf = i965_libdrm_buffer(buffer);
    struct i965_libdrm_buffer *buf2 = i965_libdrm_buffer(buffer2);
+   int read, write;
    int ret;
 
-   ret = dri_bo_emit_reloc( buf->bo, domain, a, b, offset, buf2->bo );
+   switch (usage) {
+   case BRW_USAGE_STATE:
+      read = I915_GEM_DOMAIN_INSTRUCTION;
+      write = 0;
+      break;
+   case BRW_USAGE_QUERY_RESULT:
+      read = I915_GEM_DOMAIN_INSTRUCTION;
+      write = I915_GEM_DOMAIN_INSTRUCTION;
+      break;
+   case BRW_USAGE_RENDER_TARGET:
+      read = I915_GEM_DOMAIN_RENDER;
+      write = 0;
+      break;
+   case BRW_USAGE_DEPTH_BUFFER:
+      read = I915_GEM_DOMAIN_RENDER;
+      write = I915_GEM_DOMAIN_RENDER;
+      break;
+   case BRW_USAGE_SAMPLER:
+      read = I915_GEM_DOMAIN_SAMPLER;
+      write = 0;
+      break;
+   case BRW_USAGE_VERTEX:
+      read = I915_GEM_DOMAIN_VERTEX;
+      write = 0;
+      break;
+   case BRW_USAGE_SCRATCH:
+      read = 0;
+      write = 0;
+      break;
+   default:
+      assert(0);
+      return -1;
+   }
+
+   ret = dri_bo_emit_reloc( buf->bo, read, write, delta, offset, buf2->bo );
    if (ret)
       return -1;