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drm/amdgpu: Add doorbell routing info to kgd2kfd_shared_resources 

This is needed for Vega10 and later ASICs to let KFD know which
doorbells can be used for SDMA and CP queues respectively.

Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
This commit is contained in:
Felix Kuehling 2018-04-10 17:33:02 -04:00 committed by Oded Gabbay
parent d5a114a6c5
commit 642a0e8026
2 changed files with 37 additions and 0 deletions
drivers/gpu/drm/amd
amdgpu
amdgpu_amdkfd.c
include
kgd_kfd_interface.h

22
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c
View File

@ -179,6 +179,28 @@ void amdgpu_amdkfd_device_init(struct amdgpu_device *adev)
&gpu_resources.doorbell_physical_address,
&gpu_resources.doorbell_aperture_size,
&gpu_resources.doorbell_start_offset);
if (adev->asic_type >= CHIP_VEGA10) {
/* On SOC15 the BIF is involved in routing
* doorbells using the low 12 bits of the
* address. Communicate the assignments to
* KFD. KFD uses two doorbell pages per
* process in case of 64-bit doorbells so we
* can use each doorbell assignment twice.
*/
gpu_resources.sdma_doorbell[0][0] =
AMDGPU_DOORBELL64_sDMA_ENGINE0;
gpu_resources.sdma_doorbell[0][1] =
AMDGPU_DOORBELL64_sDMA_ENGINE0 + 0x200;
gpu_resources.sdma_doorbell[1][0] =
AMDGPU_DOORBELL64_sDMA_ENGINE1;
gpu_resources.sdma_doorbell[1][1] =
AMDGPU_DOORBELL64_sDMA_ENGINE1 + 0x200;
/* Doorbells 0x0f0-0ff and 0x2f0-2ff are reserved for
* SDMA, IH and VCN. So don't use them for the CP.
*/
gpu_resources.reserved_doorbell_mask = 0x1f0;
gpu_resources.reserved_doorbell_val = 0x0f0;
}
kgd2kfd->device_init(adev->kfd, &gpu_resources);
}

15
drivers/gpu/drm/amd/include/kgd_kfd_interface.h
View File

@ -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;