brw_clip_state.c revision faeb1bc9f9c5935ecbd32c17d81507d5061a6270 
1/*
2 Copyright (C) Intel Corp.  2006.  All Rights Reserved.
3 Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
4 develop this 3D driver.
5
6 Permission is hereby granted, free of charge, to any person obtaining
7 a copy of this software and associated documentation files (the
8 "Software"), to deal in the Software without restriction, including
9 without limitation the rights to use, copy, modify, merge, publish,
10 distribute, sublicense, and/or sell copies of the Software, and to
11 permit persons to whom the Software is furnished to do so, subject to
12 the following conditions:
13
14 The above copyright notice and this permission notice (including the
15 next paragraph) shall be included in all copies or substantial
16 portions of the Software.
17
18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
21 IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
22 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
24 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25
26 **********************************************************************/
27 /*
28  * Authors:
29  *   Keith Whitwell <keith@tungstengraphics.com>
30  */
31
32#include "brw_context.h"
33#include "brw_state.h"
34#include "brw_defines.h"
35#include "macros.h"
36
37struct brw_clip_unit_key {
38   unsigned int total_grf;
39   unsigned int urb_entry_read_length;
40   unsigned int curb_entry_read_length;
41   unsigned int clip_mode;
42
43   unsigned int curbe_offset;
44
45   unsigned int nr_urb_entries, urb_size;
46};
47
48static void
49clip_unit_populate_key(struct brw_context *brw, struct brw_clip_unit_key *key)
50{
51   memset(key, 0, sizeof(*key));
52
53   /* CACHE_NEW_CLIP_PROG */
54   key->total_grf = brw->clip.prog_data->total_grf;
55   key->urb_entry_read_length = brw->clip.prog_data->urb_read_length;
56   key->curb_entry_read_length = brw->clip.prog_data->curb_read_length;
57   key->clip_mode = brw->clip.prog_data->clip_mode;
58
59   /* BRW_NEW_CURBE_OFFSETS */
60   key->curbe_offset = brw->curbe.clip_start;
61
62   /* BRW_NEW_URB_FENCE */
63   key->nr_urb_entries = brw->urb.nr_clip_entries;
64   key->urb_size = brw->urb.vsize;
65}
66
67static dri_bo *
68clip_unit_create_from_key(struct brw_context *brw,
69			  struct brw_clip_unit_key *key)
70{
71   struct brw_clip_unit_state clip;
72   dri_bo *bo;
73
74   memset(&clip, 0, sizeof(clip));
75
76   clip.thread0.grf_reg_count = ALIGN(key->total_grf, 16) / 16 - 1;
77   /* reloc */
78   clip.thread0.kernel_start_pointer = brw->clip.prog_bo->offset >> 6;
79
80   clip.thread1.floating_point_mode = BRW_FLOATING_POINT_NON_IEEE_754;
81   clip.thread1.single_program_flow = 1;
82
83   clip.thread3.urb_entry_read_length = key->urb_entry_read_length;
84   clip.thread3.const_urb_entry_read_length = key->curb_entry_read_length;
85   clip.thread3.const_urb_entry_read_offset = key->curbe_offset * 2;
86   clip.thread3.dispatch_grf_start_reg = 1;
87   clip.thread3.urb_entry_read_offset = 0;
88
89   clip.thread4.nr_urb_entries = key->nr_urb_entries;
90   clip.thread4.urb_entry_allocation_size = key->urb_size - 1;
91   clip.thread4.max_threads = 1; /* 2 threads */
92
93   if (INTEL_DEBUG & DEBUG_STATS)
94      clip.thread4.stats_enable = 1;
95
96   clip.clip5.userclip_enable_flags = 0x7f;
97   clip.clip5.userclip_must_clip = 1;
98   clip.clip5.guard_band_enable = 0;
99   clip.clip5.viewport_z_clip_enable = 1;
100   clip.clip5.viewport_xy_clip_enable = 1;
101   clip.clip5.vertex_position_space = BRW_CLIP_NDCSPACE;
102   clip.clip5.api_mode = BRW_CLIP_API_OGL;
103   clip.clip5.clip_mode = key->clip_mode;
104   clip.clip6.clipper_viewport_state_ptr = 0;
105   clip.viewport_xmin = -1;
106   clip.viewport_xmax = 1;
107   clip.viewport_ymin = -1;
108   clip.viewport_ymax = 1;
109
110   bo = brw_upload_cache(&brw->cache, BRW_CLIP_UNIT,
111			 key, sizeof(*key),
112			 &brw->clip.prog_bo, 1,
113			 &clip, sizeof(clip),
114			 NULL, NULL);
115
116   /* Emit clip program relocation */
117   assert(brw->clip.prog_bo);
118   dri_emit_reloc(bo,
119		  DRM_BO_FLAG_MEM_TT | DRM_BO_FLAG_READ,
120		  clip.thread0.grf_reg_count << 1,
121		  offsetof(struct brw_clip_unit_state, thread0),
122		  brw->clip.prog_bo);
123
124   return bo;
125}
126
127static void upload_clip_unit( struct brw_context *brw )
128{
129   struct brw_clip_unit_key key;
130
131   clip_unit_populate_key(brw, &key);
132
133   dri_bo_unreference(brw->clip.state_bo);
134   brw->clip.state_bo = brw_search_cache(&brw->cache, BRW_CLIP_UNIT,
135					 &key, sizeof(key),
136					 &brw->clip.prog_bo, 1,
137					 NULL);
138   if (brw->clip.state_bo == NULL) {
139      brw->clip.state_bo = clip_unit_create_from_key(brw, &key);
140   }
141}
142
143const struct brw_tracked_state brw_clip_unit = {
144   .dirty = {
145      .mesa  = 0,
146      .brw   = (BRW_NEW_CURBE_OFFSETS |
147		BRW_NEW_URB_FENCE),
148      .cache = CACHE_NEW_CLIP_PROG
149   },
150   .update = upload_clip_unit,
151};
152