diff options
| author | Prike Liang <Prike.Liang@amd.com> | 2026-05-26 10:25:26 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2026-06-03 14:55:31 -0400 |
| commit | 5af28a22ce834544bb22efbba30ffb837098b2b8 (patch) | |
| tree | f20eea21f6cf1bf624748fadc118ee28330c0419 /drivers | |
| parent | 2a07f3fa4998e2ef248e1f55cd3776348758aec0 (diff) | |
drm/amdgpu: improve the userq seq BO free bit lookup
Use find_next_zero_bit() to locate the next free seq slot bit
instead of the current walk, for more efficient bitmap scanning.
Signed-off-by: Prike Liang <Prike.Liang@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit ff905a9b6228de9eedd0db71ecb1bdde91fb898d)
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_seq64.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_seq64.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_seq64.c index f4be19223588..21a225b0116a 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_seq64.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_seq64.c @@ -173,16 +173,17 @@ error: int amdgpu_seq64_alloc(struct amdgpu_device *adev, u64 *va, u64 *gpu_addr, u64 **cpu_addr) { - unsigned long bit_pos; + unsigned long bit_pos = 0; - for (;;) { - bit_pos = find_first_zero_bit(adev->seq64.used, adev->seq64.num_sem); + do { + bit_pos = find_next_zero_bit(adev->seq64.used, + adev->seq64.num_sem, bit_pos); if (bit_pos >= adev->seq64.num_sem) return -ENOSPC; - if (!test_and_set_bit(bit_pos, adev->seq64.used)) break; - } + bit_pos++; + } while (1); *va = bit_pos * sizeof(u64) + amdgpu_seq64_get_va_base(adev); |