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drm/amdkfd: Fix bugs regarding CP queue doorbell mask on SOC15

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Reserved doorbells for SDMA IH and VCN were not properly masked out
when allocating doorbells for CP user queues. This patch fixed that.

Signed-off-by: Yong Zhao <Yong.Zhao@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Yong Zhao
2019-02-13 13:15:05 -05:00
committed by Alex Deucher
parent 828845b7c8
commit 1f86805adc
4 changed files with 38 additions and 18 deletions
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11
drivers/gpu/drm/amd/amdkfd/kfd_priv.h
View File

@@ -103,6 +103,17 @@
#define KFD_KERNEL_QUEUE_SIZE 2048
/*
* 512 = 0x200
* The doorbell index distance between SDMA RLC (2*i) and (2*i+1) in the
* same SDMA engine on SOC15, which has 8-byte doorbells for SDMA.
* 512 8-byte doorbell distance (i.e. one page away) ensures that SDMA RLC
* (2*i+1) doorbells (in terms of the lower 12 bit address) lie exactly in
* the OFFSET and SIZE set in registers like BIF_SDMA0_DOORBELL_RANGE.
*/
#define KFD_QUEUE_DOORBELL_MIRROR_OFFSET 512
/*
* Kernel module parameter to specify maximum number of supported queues per
* device

14
drivers/gpu/drm/amd/amdkfd/kfd_process.c
View File

@@ -607,13 +607,17 @@ static int init_doorbell_bitmap(struct qcm_process_device *qpd,
if (!qpd->doorbell_bitmap)
return -ENOMEM;
/* Mask out any reserved doorbells */
for (i = 0; i < KFD_MAX_NUM_OF_QUEUES_PER_PROCESS; i++)
if ((dev->shared_resources.reserved_doorbell_mask & i) ==
dev->shared_resources.reserved_doorbell_val) {
/* Mask out doorbells reserved for SDMA, IH, and VCN on SOC15. */
for (i = 0; i < KFD_MAX_NUM_OF_QUEUES_PER_PROCESS / 2; i++) {
if (i >= dev->shared_resources.non_cp_doorbells_start
&& i <= dev->shared_resources.non_cp_doorbells_end) {
set_bit(i, qpd->doorbell_bitmap);
pr_debug("reserved doorbell 0x%03x\n", i);
set_bit(i + KFD_QUEUE_DOORBELL_MIRROR_OFFSET,
qpd->doorbell_bitmap);
pr_debug("reserved doorbell 0x%03x and 0x%03x\n", i,
i + KFD_QUEUE_DOORBELL_MIRROR_OFFSET);
}
}
return 0;
}