src/panfrost/bifrost/bi_quirks.h

   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
  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