drivers/gpu/drm/i915/selftests/intel_engine_cs.c

   1 /*
   2  * SPDX-License-Identifier: GPL-2.0
   3  *
   4  * Copyright © 2018 Intel Corporation
   5  */
   6
   7 #include "../i915_selftest.h"
   8
   9 static int intel_mmio_bases_check(void *arg)
  10 {
  11         int i, j;
  12
  13         for (i = 0; i < ARRAY_SIZE(intel_engines); i++) {
  14                 const struct engine_info *info = &intel_engines[i];
  15                 char name[INTEL_ENGINE_CS_MAX_NAME];
  16                 u8 prev = U8_MAX;
  17
  18                 __sprint_engine_name(name, info);
  19
  20                 for (j = 0; j < MAX_MMIO_BASES; j++) {
  21                         u8 gen = info->mmio_bases[j].gen;
  22                         u32 base = info->mmio_bases[j].base;
  23
  24                         if (gen >= prev) {
  25                                 pr_err("%s: %s: mmio base for gen %x "
  26                                         "is before the one for gen %x\n",
  27                                        __func__, name, prev, gen);
  28                                 return -EINVAL;
  29                         }
  30
  31                         if (gen == 0)
  32                                 break;
  33
  34                         if (!base) {
  35                                 pr_err("%s: %s: invalid mmio base (%x) "
  36                                         "for gen %x at entry %u\n",
  37                                        __func__, name, base, gen, j);
  38                                 return -EINVAL;
  39                         }
  40
  41                         prev = gen;
  42                 }
  43
  44                 pr_info("%s: min gen supported for %s = %d\n",
  45                         __func__, name, prev);
  46         }
  47
  48         return 0;
  49 }
  50
  51 int intel_engine_cs_mock_selftests(void)
  52 {
  53         static const struct i915_subtest tests[] = {
  54                 SUBTEST(intel_mmio_bases_check),
  55         };
  56
  57         return i915_subtests(tests, NULL);
  58 }