* Sandybridge GT1 has 32kB of URB space, while GT2 has 64kB.
* (See the Sandybridge PRM, Volume 2, Part 1, Section 1.4.7: 3DSTATE_URB.)
*/
-static void
-gen6_upload_urb( struct brw_context *brw )
+void
+gen6_upload_urb(struct brw_context *brw, unsigned vs_size,
+ bool gs_present, unsigned gs_size)
{
- struct intel_context *intel = &brw->intel;
int nr_vs_entries, nr_gs_entries;
int total_urb_size = brw->urb.size * 1024; /* in bytes */
-
- /* CACHE_NEW_VS_PROG */
- unsigned vs_size = MAX2(brw->vs.prog_data->urb_entry_size, 1);
-
- /* We use the same VUE layout for VS outputs and GS outputs (as it's what
- * the SF and Clipper expect), so we can simply make the GS URB entry size
- * the same as for the VS. This may technically be too large in cases
- * where we have few vertex attributes and a lot of varyings, since the VS
- * size is determined by the larger of the two. For now, it's safe.
- */
- unsigned gs_size = vs_size;
+ const struct gen_device_info *devinfo = &brw->screen->devinfo;
/* Calculate how many entries fit in each stage's section of the URB */
- if (brw->gs.prog_active) {
+ if (gs_present) {
nr_vs_entries = (total_urb_size/2) / (vs_size * 128);
nr_gs_entries = (total_urb_size/2) / (gs_size * 128);
} else {
}
/* Then clamp to the maximum allowed by the hardware */
- if (nr_vs_entries > brw->urb.max_vs_entries)
- nr_vs_entries = brw->urb.max_vs_entries;
+ if (nr_vs_entries > devinfo->urb.max_entries[MESA_SHADER_VERTEX])
+ nr_vs_entries = devinfo->urb.max_entries[MESA_SHADER_VERTEX];
- if (nr_gs_entries > brw->urb.max_gs_entries)
- nr_gs_entries = brw->urb.max_gs_entries;
+ if (nr_gs_entries > devinfo->urb.max_entries[MESA_SHADER_GEOMETRY])
+ nr_gs_entries = devinfo->urb.max_entries[MESA_SHADER_GEOMETRY];
/* Finally, both must be a multiple of 4 (see 3DSTATE_URB in the PRM). */
brw->urb.nr_vs_entries = ROUND_DOWN_TO(nr_vs_entries, 4);
brw->urb.nr_gs_entries = ROUND_DOWN_TO(nr_gs_entries, 4);
- assert(brw->urb.nr_vs_entries >= 24);
+ assert(brw->urb.nr_vs_entries >=
+ devinfo->urb.min_entries[MESA_SHADER_VERTEX]);
assert(brw->urb.nr_vs_entries % 4 == 0);
assert(brw->urb.nr_gs_entries % 4 == 0);
- assert(vs_size < 5);
- assert(gs_size < 5);
+ assert(vs_size <= 5);
+ assert(gs_size <= 5);
BEGIN_BATCH(3);
OUT_BATCH(_3DSTATE_URB << 16 | (3 - 2));
* doesn't exist on Gen6). So for now we just do a full pipeline flush as
* a workaround.
*/
- if (brw->urb.gen6_gs_previously_active && !brw->gs.prog_active)
- intel_batchbuffer_emit_mi_flush(intel);
- brw->urb.gen6_gs_previously_active = brw->gs.prog_active;
+ if (brw->urb.gs_present && !gs_present)
+ brw_emit_mi_flush(brw);
+ brw->urb.gs_present = gs_present;
+}
+
+static void
+upload_urb(struct brw_context *brw)
+{
+ /* BRW_NEW_VS_PROG_DATA */
+ const struct brw_vue_prog_data *vs_vue_prog_data =
+ brw_vue_prog_data(brw->vs.base.prog_data);
+ const unsigned vs_size = MAX2(vs_vue_prog_data->urb_entry_size, 1);
+
+ /* BRW_NEW_GEOMETRY_PROGRAM, BRW_NEW_GS_PROG_DATA */
+ const bool gs_present =
+ brw->ff_gs.prog_active || brw->programs[MESA_SHADER_GEOMETRY];
+
+ /* Whe using GS to do transform feedback only we use the same VUE layout for
+ * VS outputs and GS outputs (as it's what the SF and Clipper expect), so we
+ * can simply make the GS URB entry size the same as for the VS. This may
+ * technically be too large in cases where we have few vertex attributes and
+ * a lot of varyings, since the VS size is determined by the larger of the
+ * two. For now, it's safe.
+ *
+ * For user-provided GS the assumption above does not hold since the GS
+ * outputs can be different from the VS outputs.
+ */
+ unsigned gs_size = vs_size;
+ if (brw->programs[MESA_SHADER_GEOMETRY]) {
+ const struct brw_vue_prog_data *gs_vue_prog_data =
+ brw_vue_prog_data(brw->gs.base.prog_data);
+ gs_size = gs_vue_prog_data->urb_entry_size;
+ assert(gs_size >= 1);
+ }
+
+ gen6_upload_urb(brw, vs_size, gs_present, gs_size);
}
const struct brw_tracked_state gen6_urb = {
.dirty = {
.mesa = 0,
- .brw = BRW_NEW_CONTEXT,
- .cache = (CACHE_NEW_VS_PROG | CACHE_NEW_GS_PROG),
+ .brw = BRW_NEW_BLORP |
+ BRW_NEW_CONTEXT |
+ BRW_NEW_FF_GS_PROG_DATA |
+ BRW_NEW_GEOMETRY_PROGRAM |
+ BRW_NEW_GS_PROG_DATA |
+ BRW_NEW_VS_PROG_DATA,
},
- .emit = gen6_upload_urb,
+ .emit = upload_urb,
};