diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c b/drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c index cb3d2ccc5100..cd4e61bf0493 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c @@ -157,6 +157,8 @@ int kfd_doorbell_mmap(struct kfd_dev *dev, struct kfd_process *process, /* Calculate physical address of doorbell */ address = kfd_get_process_doorbells(pdd); + if (!address) + return -ENOMEM; vma->vm_flags |= VM_IO | VM_DONTCOPY | VM_DONTEXPAND | VM_NORESERVE | VM_DONTDUMP | VM_PFNMAP; @@ -275,6 +277,13 @@ uint64_t kfd_get_number_elems(struct kfd_dev *kfd) phys_addr_t kfd_get_process_doorbells(struct kfd_process_device *pdd) { + if (!pdd->doorbell_index) { + int r = kfd_alloc_process_doorbells(pdd->dev, + &pdd->doorbell_index); + if (r) + return 0; + } + return pdd->dev->doorbell_base + pdd->doorbell_index * kfd_doorbell_process_slice(pdd->dev); } @@ -294,6 +303,9 @@ int kfd_alloc_process_doorbells(struct kfd_dev *kfd, unsigned int *doorbell_inde if (r > 0) *doorbell_index = r; + if (r < 0) + pr_err("Failed to allocate process doorbells\n"); + return r; } |