diff options
Diffstat (limited to 'drivers/gpu/drm/amd/include/kgd_kfd_interface.h')
| -rw-r--r-- | drivers/gpu/drm/amd/include/kgd_kfd_interface.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/include/kgd_kfd_interface.h b/drivers/gpu/drm/amd/include/kgd_kfd_interface.h index 7cf35068866f..5733fbee07f7 100644 --- a/drivers/gpu/drm/amd/include/kgd_kfd_interface.h +++ b/drivers/gpu/drm/amd/include/kgd_kfd_interface.h @@ -100,6 +100,21 @@ struct kgd2kfd_shared_resources { /* Bit n == 1 means Queue n is available for KFD */ DECLARE_BITMAP(queue_bitmap, KGD_MAX_QUEUES); + /* Doorbell assignments (SOC15 and later chips only). Only + * specific doorbells are routed to each SDMA engine. Others + * are routed to IH and VCN. They are not usable by the CP. + * + * Any doorbell number D that satisfies the following condition + * is reserved: (D & reserved_doorbell_mask) == reserved_doorbell_val + * + * KFD currently uses 1024 (= 0x3ff) doorbells per process. If + * doorbells 0x0f0-0x0f7 and 0x2f-0x2f7 are reserved, that means + * mask would be set to 0x1f8 and val set to 0x0f0. + */ + unsigned int sdma_doorbell[2][2]; + unsigned int reserved_doorbell_mask; + unsigned int reserved_doorbell_val; + /* Base address of doorbell aperture. */ phys_addr_t doorbell_physical_address; |