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/*
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 struct brw_winsys_buffer *
clip_unit_create_from_key(struct brw_context *brw,
struct brw_clip_unit_key *key)
{
struct brw_clip_unit_state clip;
struct brw_winsys_buffer *bo;
memset(&clip, 0, sizeof(clip));
clip.thread0.grf_reg_count = align(key->total_grf, 16) / 16 - 1;
/* reloc */
clip.thread0.kernel_start_pointer = brw->clip.prog_bo->offset >> 6;
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;
bo = brw_upload_cache(&brw->cache, BRW_CLIP_UNIT,
key, sizeof(*key),
&brw->clip.prog_bo, 1,
&clip, sizeof(clip),
NULL, NULL);
/* Emit clip program relocation */
assert(brw->clip.prog_bo);
brw->sws->bo_emit_reloc(bo,
I915_GEM_DOMAIN_INSTRUCTION,
0,
clip.thread0.grf_reg_count << 1,
offsetof(struct brw_clip_unit_state, thread0),
brw->clip.prog_bo);
return bo;
}
static int upload_clip_unit( struct brw_context *brw )
{
struct brw_clip_unit_key key;
clip_unit_populate_key(brw, &key);
brw->sws->bo_unreference(brw->clip.state_bo);
brw->clip.state_bo = brw_search_cache(&brw->cache, BRW_CLIP_UNIT,
&key, sizeof(key),
&brw->clip.prog_bo, 1,
NULL);
if (brw->clip.state_bo == NULL) {
brw->clip.state_bo = clip_unit_create_from_key(brw, &key);
}
return 0;
}
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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