diff options
| author | Kevin Wang <kevin1.wang@amd.com> | 2020-01-19 17:20:43 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2020-07-01 01:59:23 -0400 |
| commit | 5d5bd5e32e6e12ab8d844b4b1a1235eb7f00c668 (patch) | |
| tree | 3e0aeb5846435539815c364b48a98a991136e35a /drivers/gpu/drm/amd/amdgpu | |
| parent | 2217b2499e6ba341f93cad99662ebdc62d3d400d (diff) | |
drm/amdgpu: restrict the hw sched jobs number to power of two
the module parameter sched_hw_submission is probably from user mode,
and the kernel need to check whether it is legal.
1. align hw sched jobs to power of 2 and set minimum number is 2.
2. use kernel api is_power_of_2() to simplify driver code.
Signed-off-by: Kevin Wang <kevin1.wang@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 10 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c | 3 |
2 files changed, 11 insertions, 2 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index b8f9c7d78a9c..2858c09fd8c0 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -1166,6 +1166,16 @@ static int amdgpu_device_check_arguments(struct amdgpu_device *adev) amdgpu_vm_fragment_size = -1; } + if (amdgpu_sched_hw_submission < 2) { + dev_warn(adev->dev, "sched hw submission jobs (%d) must be at least 2\n", + amdgpu_sched_hw_submission); + amdgpu_sched_hw_submission = 2; + } else if (!is_power_of_2(amdgpu_sched_hw_submission)) { + dev_warn(adev->dev, "sched hw submission jobs (%d) must be a power of 2\n", + amdgpu_sched_hw_submission); + amdgpu_sched_hw_submission = roundup_pow_of_two(amdgpu_sched_hw_submission); + } + amdgpu_device_check_smu_prv_buffer_size(adev); amdgpu_device_check_vm_size(adev); diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c index 60b323d7caf2..8d84975885cd 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c @@ -450,8 +450,7 @@ int amdgpu_fence_driver_init_ring(struct amdgpu_ring *ring, if (!adev) return -EINVAL; - /* Check that num_hw_submission is a power of two */ - if ((num_hw_submission & (num_hw_submission - 1)) != 0) + if (!is_power_of_2(num_hw_submission)) return -EINVAL; ring->fence_drv.cpu_addr = NULL; |