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iris: Use a tiny table to map mmap modes to offsets

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This is a little more obvious than the if-ladder.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11888>
This commit is contained in:
Jason Ekstrand 2021-07-14 13:17:03 -05:00 • committed by Marge Bot
parent c49041c9d7
commit 24031700a7
1 changed files with 7 additions and 6 deletions
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13
src/gallium/drivers/iris/iris_bufmgr.c
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@ -1043,12 +1043,13 @@ iris_bo_gem_mmap_offset(struct pipe_debug_callback *dbg, struct iris_bo *bo)
.handle = bo->gem_handle,
};
if (bo->mmap_mode == IRIS_MMAP_WB)
mmap_arg.flags = I915_MMAP_OFFSET_WB;
else if (bo->mmap_mode == IRIS_MMAP_WC)
mmap_arg.flags = I915_MMAP_OFFSET_WC;
else
mmap_arg.flags = I915_MMAP_OFFSET_UC;
static const uint32_t mmap_offset_for_mode[] = {
[IRIS_MMAP_UC] = I915_MMAP_OFFSET_UC,
[IRIS_MMAP_WC] = I915_MMAP_OFFSET_WC,
[IRIS_MMAP_WB] = I915_MMAP_OFFSET_WB,
};
assert(bo->mmap_mode < ARRAY_SIZE(mmap_offset_for_mode));
mmap_arg.flags = mmap_offset_for_mode[bo->mmap_mode];
/* Get the fake offset back */
int ret = intel_ioctl(bufmgr->fd, DRM_IOCTL_I915_GEM_MMAP_OFFSET, &mmap_arg);