From b408a548846f2343716351d55a6c9af9e73ec32c Mon Sep 17 00:00:00 2001 From: Felix Kuehling Date: Tue, 20 Nov 2018 21:44:27 -0500 Subject: 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 Signed-off-by: Felix Kuehling Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'drivers/gpu/drm/amd/amdkfd/kfd_chardev.c') 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); -- cgit