drm/amdkfd: Relax size checking during queue buffer get

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[ Upstream commit 42ea9cf2f1 ]

HW-supported EOP buffer sizes are 4K and 32K. On systems that do not
use 4K pages, the minimum buffer object (BO) allocation size is
PAGE_SIZE (for example, 64K). During queue buffer acquisition, the driver
currently checks the allocated BO size against the supported EOP buffer
size. Since the allocated BO is larger than the expected size, this check
fails, preventing queue creation.

Relax the strict size validation and allow PAGE_SIZE-sized BOs to be used.
Only the required 4K region of the buffer will be used as the EOP buffer
and avoids queue creation failures on non-4K page systems.

Acked-by: Christian König <christian.koenig@amd.com>
Suggested-by: Philip Yang <yangp@amd.com>
Signed-off-by: Donet Tom <donettom@linux.ibm.com>
Signed-off-by: Felix Kuehling <felix.kuehling@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Donet Tom 2026-01-12 19:36:54 +05:30 • committed by Sasha Levin

parent 6eb9fc7d45

commit acfc84cfa7

1 changed files with 3 additions and 3 deletions

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drivers/gpu/drm/amd/amdkfd/kfd_queue.c

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