1 /*
2 * Copyright (C) 2019-2020 Collabora, Ltd.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 * SOFTWARE.
22 */
23
24 #ifndef __BI_QUIRKS_H
25 #define __BI_QUIRKS_H
26
27 /* Model-specific quirks requiring compiler workarounds/etc. Quirks
28 * may be errata requiring a workaround, or features. We're trying to be
29 * quirk-positive here; quirky is the best! */
30
31 /* Whether this GPU lacks support for the preload mechanism. New GPUs can have
32 * varyings and textures preloaded into the fragment shader to amortize the I/O
33 * cost; early Bifrost models lacked this feature. */
34
35 #define BIFROST_NO_PRELOAD (1 << 0)
36
37 /* Whether this GPU lacks support for the _FAST family of opcodes for fast
38 * computation of special functions requiring lookup tables. Early GPUs require
39 * rather unweildly lowering mechanisms for thesr things. */
40
41 #define BIFROST_NO_FAST_OP (1 << 1)
42
43 static inline unsigned
bifrost_get_quirks(unsigned product_id)44 bifrost_get_quirks(unsigned product_id)
45 {
46 switch (product_id >> 12) {
47 case 6: /* 1st gen */
48 return BIFROST_NO_PRELOAD |
49 BIFROST_NO_FAST_OP;
50
51 case 7: /* 2nd gen */
52 case 8: /* 3rd gen */
53 return 0;
54
55 default:
56 unreachable("Unknown Bifrost GPU ID");
57 }
58 }
59
60 #endif
61