diff options
| author | Nils Wallménius <nils.wallmenius@gmail.com> | 2017-01-16 21:56:48 +0100 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2017-01-27 11:13:32 -0500 |
| commit | 50261151a13176a99ee6117dbbb2e557fd0b608b (patch) | |
| tree | fb6fe0437e2e5e44fa25edc4dd1f6df169da066d /drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c | |
| parent | cb341a319f7e66f879d69af929c3dadfc1a8f31e (diff) | |
| download | op-kernel-dev-50261151a13176a99ee6117dbbb2e557fd0b608b.zip op-kernel-dev-50261151a13176a99ee6117dbbb2e557fd0b608b.tar.gz | |
drm/amdgpu: simplify allocation of scratch regs
The scratch regs are sequential so there's no need to keep
them in an array, we can just return the index of the first
free register + the base register. Also change the array
of bools for keeping track of the free regs to a bitfield.
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Nils Wallménius <nils.wallmenius@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c | 21 |
1 files changed, 7 insertions, 14 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c index 01a42b6..1994335 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c @@ -42,12 +42,12 @@ int amdgpu_gfx_scratch_get(struct amdgpu_device *adev, uint32_t *reg) { int i; - for (i = 0; i < adev->gfx.scratch.num_reg; i++) { - if (adev->gfx.scratch.free[i]) { - adev->gfx.scratch.free[i] = false; - *reg = adev->gfx.scratch.reg[i]; - return 0; - } + i = ffs(adev->gfx.scratch.free_mask); + if (i != 0 && i <= adev->gfx.scratch.num_reg) { + i--; + adev->gfx.scratch.free_mask &= ~(1u << i); + *reg = adev->gfx.scratch.reg_base + i; + return 0; } return -EINVAL; } @@ -62,14 +62,7 @@ int amdgpu_gfx_scratch_get(struct amdgpu_device *adev, uint32_t *reg) */ void amdgpu_gfx_scratch_free(struct amdgpu_device *adev, uint32_t reg) { - int i; - - for (i = 0; i < adev->gfx.scratch.num_reg; i++) { - if (adev->gfx.scratch.reg[i] == reg) { - adev->gfx.scratch.free[i] = true; - return; - } - } + adev->gfx.scratch.free_mask |= 1u << (reg - adev->gfx.scratch.reg_base); } /** |
