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| author | Felix Kuehling <Felix.Kuehling@amd.com> | 2018-11-20 21:44:27 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2018-12-07 18:14:00 -0500 |
| commit | b408a548846f2343716351d55a6c9af9e73ec32c (patch) | |
| tree | fc67d39a714e6276d23715f0f4fe6ed76ba90ef6 /drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | |
| parent | 1dde0ea95b782425b95455d487cb44991525a1d1 (diff) | |
| download | linux-b408a548846f2343716351d55a6c9af9e73ec32c.tar.bz2 | |
drm/amdkfd: Add support for doorbell BOs
This allows user mode to map doorbell pages into GPUVM address space.
That way GPUs can submit to user mode queues (self-dispatch).
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdkfd/kfd_chardev.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c index ae3ae0fb2602..3623538baf6f 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c @@ -1274,6 +1274,12 @@ static int kfd_ioctl_alloc_memory_of_gpu(struct file *filep, return -EINVAL; } + if (flags & KFD_IOC_ALLOC_MEM_FLAGS_DOORBELL) { + if (args->size != kfd_doorbell_process_slice(dev)) + return -EINVAL; + offset = kfd_get_process_doorbells(dev, p); + } + mutex_lock(&p->mutex); pdd = kfd_bind_process_to_device(dev, p); |