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/* XXX: Constant buffers disabled
*/
/**
* Create the constant buffer surface. Vertex/fragment shader constants will be
* read from this buffer with Data Port Read instructions/messages.
*/
struct brw_winsys_buffer *
brw_create_constant_surface( struct brw_context *brw,
struct brw_surface_key *key )
{
const GLint w = key->width - 1;
struct brw_winsys_buffer *bo;
memset(&surf, 0, sizeof(surf));
surf.ss0.mipmap_layout_mode = BRW_SURFACE_MIPMAPLAYOUT_BELOW;
surf.ss0.surface_type = BRW_SURFACE_BUFFER;
surf.ss0.surface_format = BRW_SURFACEFORMAT_R32G32B32A32_FLOAT;
assert(key->bo);
surf.ss1.base_addr = key->bo->offset; /* reloc */
surf.ss2.width = w & 0x7f; /* bits 6:0 of size or width */
surf.ss2.height = (w >> 7) & 0x1fff; /* bits 19:7 of size or width */
surf.ss3.depth = (w >> 20) & 0x7f; /* bits 26:20 of size or width */
surf.ss3.pitch = (key->pitch * key->cpp) - 1; /* ignored?? */
brw_set_surface_tiling(&surf, key->tiling); /* tiling now allowed */
bo = brw_upload_cache(&brw->surface_cache, BRW_SS_SURFACE,
key, sizeof(*key),
&key->bo, key->bo ? 1 : 0,
&surf, sizeof(surf),
NULL, NULL);
if (key->bo) {
/* Emit relocation to surface contents */
brw->sws->bo_emit_reloc(bo,
I915_GEM_DOMAIN_SAMPLER, 0,
0,
offsetof(struct brw_surface_state, ss1),
key->bo);
}
return bo;
}
/**
* Update the surface state for a WM constant buffer.
* The constant buffer will be (re)allocated here if needed.
*/
static void
brw_update_wm_constant_surface( struct brw_context *brw,
GLuint surf)
{
struct brw_surface_key key;
struct brw_fragment_shader *fp = brw->curr.fragment_shader;
struct pipe_buffer *cbuf = brw->curr.fragment_constants;
int pitch = cbuf->size / (4 * sizeof(float));
/* If we're in this state update atom, we need to update WM constants, so
* free the old buffer and create a new one for the new contents.
*/
brw->sws->bo_unreference(fp->const_buffer);
fp->const_buffer = brw_wm_update_constant_buffer(brw);
/* If there's no constant buffer, then no surface BO is needed to point at
* it.
*/
if (cbuf == NULL) {
drm_intel_bo_unreference(brw->wm.surf_bo[surf]);
brw->wm.surf_bo[surf] = NULL;
return;
}
memset(&key, 0, sizeof(key));
key.ss0.mipmap_layout_mode = BRW_SURFACE_MIPMAPLAYOUT_BELOW;
key.ss0.surface_type = BRW_SURFACE_BUFFER;
key.ss0.surface_format = BRW_SURFACEFORMAT_R32G32B32A32_FLOAT;
key.bo = brw_buffer(cbuf)->bo;
key.ss2.width = (pitch-1) & 0x7f; /* bits 6:0 of size or width */
key.ss2.height = ((pitch-1) >> 7) & 0x1fff; /* bits 19:7 of size or width */
key.ss3.depth = ((pitch-1) >> 20) & 0x7f; /* bits 26:20 of size or width */
key.ss3.pitch = (pitch * 4 * sizeof(float)) - 1; /* ignored?? */
brw_set_surface_tiling(&surf, key->tiling); /* tiling now allowed */
/*
printf("%s:\n", __FUNCTION__);
printf(" width %d height %d depth %d cpp %d pitch %d\n",
key.width, key.height, key.depth, key.cpp, key.pitch);
*/
brw->sws->bo_unreference(brw->wm.surf_bo[surf]);
brw->wm.surf_bo[surf] = brw_search_cache(&brw->surface_cache,
BRW_SS_SURFACE,
&key, sizeof(key),
&key.bo, 1,
NULL);
if (brw->wm.surf_bo[surf] == NULL) {
brw->wm.surf_bo[surf] = brw_create_constant_surface(brw, &key);
}
brw->state.dirty.brw |= BRW_NEW_WM_SURFACES;
}
/**
* Updates surface / buffer for fragment shader constant buffer, if
* one is required.
*
* This consumes the state updates for the constant buffer, and produces
* BRW_NEW_WM_SURFACES to get picked up by brw_prepare_wm_surfaces for
* inclusion in the binding table.
*/
static void prepare_wm_constant_surface(struct brw_context *brw )
{
struct brw_fragment_program *fp =
(struct brw_fragment_program *) brw->fragment_program;
GLuint surf = SURF_INDEX_FRAG_CONST_BUFFER;
drm_intel_bo_unreference(fp->const_buffer);
fp->const_buffer = brw_wm_update_constant_buffer(brw);
/* If there's no constant buffer, then no surface BO is needed to point at
* it.
*/
if (fp->const_buffer == 0) {
if (brw->wm.surf_bo[surf] != NULL) {
drm_intel_bo_unreference(brw->wm.surf_bo[surf]);
brw->wm.surf_bo[surf] = NULL;
brw->state.dirty.brw |= BRW_NEW_WM_SURFACES;
}
return;
}
brw_update_wm_constant_surface(ctx, surf);
}
const struct brw_tracked_state brw_wm_constant_surface = {
.dirty = {
.mesa = (_NEW_PROGRAM_CONSTANTS),
.brw = (BRW_NEW_FRAGMENT_PROGRAM),
.cache = 0
},
.prepare = prepare_wm_constant_surface,
};
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