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Diffstat (limited to 'src/gallium/drivers/i965/brw_clip_state.c')
-rw-r--r--src/gallium/drivers/i965/brw_clip_state.c209
1 files changed, 209 insertions, 0 deletions
diff --git a/src/gallium/drivers/i965/brw_clip_state.c b/src/gallium/drivers/i965/brw_clip_state.c
new file mode 100644
index 0000000000..5c3ccfd8d0
--- /dev/null
+++ b/src/gallium/drivers/i965/brw_clip_state.c
@@ -0,0 +1,209 @@
+/*
+ Copyright (C) Intel Corp. 2006. All Rights Reserved.
+ Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
+ develop this 3D driver.
+
+ 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, sublicense, 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 NONINFRINGEMENT.
+ IN NO EVENT SHALL THE COPYRIGHT OWNER(S) 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.
+
+ **********************************************************************/
+ /*
+ * Authors:
+ * Keith Whitwell <keith@tungstengraphics.com>
+ */
+
+#include "util/u_math.h"
+
+#include "brw_context.h"
+#include "brw_clip.h"
+#include "brw_state.h"
+#include "brw_defines.h"
+#include "brw_debug.h"
+
+struct brw_clip_unit_key {
+ unsigned int total_grf;
+ unsigned int urb_entry_read_length;
+ unsigned int curb_entry_read_length;
+ unsigned int clip_mode;
+
+ unsigned int curbe_offset;
+
+ unsigned int nr_urb_entries, urb_size;
+
+ GLboolean depth_clamp;
+};
+
+static void
+clip_unit_populate_key(struct brw_context *brw, struct brw_clip_unit_key *key)
+{
+ memset(key, 0, sizeof(*key));
+
+ /* CACHE_NEW_CLIP_PROG */
+ key->total_grf = brw->clip.prog_data->total_grf;
+ key->urb_entry_read_length = brw->clip.prog_data->urb_read_length;
+ key->curb_entry_read_length = brw->clip.prog_data->curb_read_length;
+ key->clip_mode = brw->clip.prog_data->clip_mode;
+
+ /* BRW_NEW_CURBE_OFFSETS */
+ key->curbe_offset = brw->curbe.clip_start;
+
+ /* BRW_NEW_URB_FENCE */
+ key->nr_urb_entries = brw->urb.nr_clip_entries;
+ key->urb_size = brw->urb.vsize;
+
+ /* */
+ key->depth_clamp = 0; /* XXX: add this to gallium: ctx->Transform.DepthClamp; */
+}
+
+static enum pipe_error
+clip_unit_create_from_key(struct brw_context *brw,
+ struct brw_clip_unit_key *key,
+ struct brw_winsys_reloc *reloc,
+ struct brw_winsys_buffer **bo_out)
+{
+ struct brw_clip_unit_state clip;
+ enum pipe_error ret;
+
+ memset(&clip, 0, sizeof(clip));
+
+ clip.thread0.grf_reg_count = align(key->total_grf, 16) / 16 - 1;
+ /* reloc */
+ clip.thread0.kernel_start_pointer = 0;
+
+ clip.thread1.floating_point_mode = BRW_FLOATING_POINT_NON_IEEE_754;
+ clip.thread1.single_program_flow = 1;
+
+ clip.thread3.urb_entry_read_length = key->urb_entry_read_length;
+ clip.thread3.const_urb_entry_read_length = key->curb_entry_read_length;
+ clip.thread3.const_urb_entry_read_offset = key->curbe_offset * 2;
+ clip.thread3.dispatch_grf_start_reg = 1;
+ clip.thread3.urb_entry_read_offset = 0;
+
+ clip.thread4.nr_urb_entries = key->nr_urb_entries;
+ clip.thread4.urb_entry_allocation_size = key->urb_size - 1;
+ /* If we have enough clip URB entries to run two threads, do so.
+ */
+ if (key->nr_urb_entries >= 10) {
+ /* Half of the URB entries go to each thread, and it has to be an
+ * even number.
+ */
+ assert(key->nr_urb_entries % 2 == 0);
+
+ /* Although up to 16 concurrent Clip threads are allowed on IGDNG,
+ * only 2 threads can output VUEs at a time.
+ */
+ if (BRW_IS_IGDNG(brw))
+ clip.thread4.max_threads = 16 - 1;
+ else
+ clip.thread4.max_threads = 2 - 1;
+ } else {
+ assert(key->nr_urb_entries >= 5);
+ clip.thread4.max_threads = 1 - 1;
+ }
+
+ if (BRW_DEBUG & DEBUG_SINGLE_THREAD)
+ clip.thread4.max_threads = 0;
+
+ if (BRW_DEBUG & DEBUG_STATS)
+ clip.thread4.stats_enable = 1;
+
+ clip.clip5.userclip_enable_flags = 0x7f;
+ clip.clip5.userclip_must_clip = 1;
+ clip.clip5.guard_band_enable = 0;
+ if (!key->depth_clamp)
+ clip.clip5.viewport_z_clip_enable = 1;
+ clip.clip5.viewport_xy_clip_enable = 1;
+ clip.clip5.vertex_position_space = BRW_CLIP_NDCSPACE;
+ clip.clip5.api_mode = BRW_CLIP_API_OGL;
+ clip.clip5.clip_mode = key->clip_mode;
+
+ if (BRW_IS_G4X(brw))
+ clip.clip5.negative_w_clip_test = 1;
+
+ clip.clip6.clipper_viewport_state_ptr = 0;
+ clip.viewport_xmin = -1;
+ clip.viewport_xmax = 1;
+ clip.viewport_ymin = -1;
+ clip.viewport_ymax = 1;
+
+ ret = brw_upload_cache(&brw->cache, BRW_CLIP_UNIT,
+ key, sizeof(*key),
+ reloc, 1,
+ &clip, sizeof(clip),
+ NULL, NULL,
+ bo_out);
+ if (ret)
+ return ret;
+
+ return PIPE_OK;
+}
+
+static int upload_clip_unit( struct brw_context *brw )
+{
+ struct brw_clip_unit_key key;
+ struct brw_winsys_reloc reloc[1];
+ unsigned grf_reg_count;
+ enum pipe_error ret;
+
+ clip_unit_populate_key(brw, &key);
+
+ grf_reg_count = align(key.total_grf, 16) / 16 - 1;
+
+ /* clip program relocation
+ *
+ * XXX: these reloc structs are long lived and only need to be
+ * updated when the bound BO changes. Hopefully the stuff mixed in
+ * in the delta's is non-orthogonal.
+ */
+ assert(brw->clip.prog_bo);
+ make_reloc(&reloc[0],
+ BRW_USAGE_STATE,
+ grf_reg_count << 1,
+ offsetof(struct brw_clip_unit_state, thread0),
+ brw->clip.prog_bo);
+
+
+ if (brw_search_cache(&brw->cache, BRW_CLIP_UNIT,
+ &key, sizeof(key),
+ reloc, 1,
+ NULL,
+ &brw->clip.state_bo))
+ return PIPE_OK;
+
+ /* Create new:
+ */
+ ret = clip_unit_create_from_key(brw, &key,
+ reloc,
+ &brw->clip.state_bo);
+ if (ret)
+ return ret;
+
+ return PIPE_OK;
+}
+
+const struct brw_tracked_state brw_clip_unit = {
+ .dirty = {
+ .mesa = 0,
+ .brw = (BRW_NEW_CURBE_OFFSETS |
+ BRW_NEW_URB_FENCE),
+ .cache = CACHE_NEW_CLIP_PROG
+ },
+ .prepare = upload_clip_unit,
+};
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