mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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Joel Fernandes
ba110db8e1
Move the DRM buddy allocator one level up so that it can be used by GPU drivers (example, nova-core) that have usecases other than DRM (such as VFIO vGPU support). Modify the API, structures and Kconfigs to use "gpu_buddy" terminology. Adapt the drivers and tests to use the new API. The commit cannot be split due to bisectability, however no functional change is intended. Verified by running K-UNIT tests and build tested various configurations. Signed-off-by: Joel Fernandes <joelagnelf@nvidia.com> Reviewed-by: Dave Airlie <airlied@redhat.com> [airlied: I've split this into two so git can find copies easier. I've also just nuked drm_random library, that stuff needs to be done elsewhere and only the buddy tests seem to be using it]. Signed-off-by: Dave Airlie <airlied@redhat.com>
29 lines
796 B
C
29 lines
796 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __GPU_RANDOM_H__
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#define __GPU_RANDOM_H__
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/* This is a temporary home for a couple of utility functions that should
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* be transposed to lib/ at the earliest convenience.
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*/
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#include <linux/prandom.h>
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#define GPU_RND_STATE_INITIALIZER(seed__) ({ \
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struct rnd_state state__; \
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prandom_seed_state(&state__, (seed__)); \
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state__; \
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})
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#define GPU_RND_STATE(name__, seed__) \
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struct rnd_state name__ = GPU_RND_STATE_INITIALIZER(seed__)
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unsigned int *gpu_random_order(unsigned int count,
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struct rnd_state *state);
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void gpu_random_reorder(unsigned int *order,
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unsigned int count,
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struct rnd_state *state);
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u32 gpu_prandom_u32_max_state(u32 ep_ro,
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struct rnd_state *state);
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#endif /* !__GPU_RANDOM_H__ */
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