brw_clip_state.c revision 3628185f566e178a12b493fb89abf52b4b281f99 
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
105   if (BRW_IS_GM45(brw) || BRW_IS_G4X(brw))
106      clip.clip5.negative_w_clip_test = 1;
107
108   clip.clip6.clipper_viewport_state_ptr = 0;
109   clip.viewport_xmin = -1;
110   clip.viewport_xmax = 1;
111   clip.viewport_ymin = -1;
112   clip.viewport_ymax = 1;
113
114   bo = brw_upload_cache(&brw->cache, BRW_CLIP_UNIT,
115			 key, sizeof(*key),
116			 &brw->clip.prog_bo, 1,
117			 &clip, sizeof(clip),
118			 NULL, NULL);
119
120   /* Emit clip program relocation */
121   assert(brw->clip.prog_bo);
122   dri_bo_emit_reloc(bo,
123		     I915_GEM_DOMAIN_INSTRUCTION,
124		     0,
125		     clip.thread0.grf_reg_count << 1,
126		     offsetof(struct brw_clip_unit_state, thread0),
127		     brw->clip.prog_bo);
128
129   return bo;
130}
131
132static void upload_clip_unit( struct brw_context *brw )
133{
134   struct brw_clip_unit_key key;
135
136   clip_unit_populate_key(brw, &key);
137
138   dri_bo_unreference(brw->clip.state_bo);
139   brw->clip.state_bo = brw_search_cache(&brw->cache, BRW_CLIP_UNIT,
140					 &key, sizeof(key),
141					 &brw->clip.prog_bo, 1,
142					 NULL);
143   if (brw->clip.state_bo == NULL) {
144      brw->clip.state_bo = clip_unit_create_from_key(brw, &key);
145   }
146}
147
148const struct brw_tracked_state brw_clip_unit = {
149   .dirty = {
150      .mesa  = 0,
151      .brw   = (BRW_NEW_CURBE_OFFSETS |
152		BRW_NEW_URB_FENCE),
153      .cache = CACHE_NEW_CLIP_PROG
154   },
155   .prepare = upload_clip_unit,
156};
157