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drm/i915/selftests: use prandom in selftest

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This is part of a prandom cleanup, which removes
next_pseudo_random32 and replaces it with the standard PRNG.

Signed-off-by: Markus Theil <theil.markus@gmail.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250211063332.16542-2-theil.markus@gmail.com
This commit is contained in:
Markus Theil
2025-02-11 07:33:30 +01:00
committed by Andi Shyti
parent fc2ef5b6e1
commit efa6fbd589
1 changed files with 4 additions and 3 deletions
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7
drivers/gpu/drm/i915/selftests/i915_gem.c
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@@ -45,13 +45,15 @@ static void trash_stolen(struct drm_i915_private *i915)
struct i915_ggtt *ggtt = to_gt(i915)->ggtt;
const u64 slot = ggtt->error_capture.start;
const resource_size_t size = resource_size(&i915->dsm.stolen);
struct rnd_state prng;
unsigned long page;
u32 prng = 0x12345678;
/* XXX: fsck. needs some more thought... */
if (!i915_ggtt_has_aperture(ggtt))
return;
prandom_seed_state(&prng, 0x12345678);
for (page = 0; page < size; page += PAGE_SIZE) {
const dma_addr_t dma = i915->dsm.stolen.start + page;
u32 __iomem *s;
@@ -64,8 +66,7 @@ static void trash_stolen(struct drm_i915_private *i915)
s = io_mapping_map_atomic_wc(&ggtt->iomap, slot);
for (x = 0; x < PAGE_SIZE / sizeof(u32); x++) {
prng = next_pseudo_random32(prng);
iowrite32(prng, &s[x]);
iowrite32(prandom_u32_state(&prng), &s[x]);
}
io_mapping_unmap_atomic(s);
}