Commit d12fb13f authored by shaoyunl's avatar shaoyunl Committed by Oded Gabbay

drm/amdkfd: Fix SDMA ring buffer size calculation

ffs function return the position of the first bit set on 1 based.
(bit zero returns 1).
Signed-off-by: default avatarshaoyun liu <shaoyun.liu@amd.com>
Signed-off-by: default avatarFelix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: default avatarOded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: default avatarOded Gabbay <oded.gabbay@gmail.com>
parent cf21654b
...@@ -202,8 +202,8 @@ static int update_mqd_sdma(struct mqd_manager *mm, void *mqd, ...@@ -202,8 +202,8 @@ static int update_mqd_sdma(struct mqd_manager *mm, void *mqd,
struct cik_sdma_rlc_registers *m; struct cik_sdma_rlc_registers *m;
m = get_sdma_mqd(mqd); m = get_sdma_mqd(mqd);
m->sdma_rlc_rb_cntl = ffs(q->queue_size / sizeof(unsigned int)) << m->sdma_rlc_rb_cntl = (ffs(q->queue_size / sizeof(unsigned int)) - 1)
SDMA0_RLC0_RB_CNTL__RB_SIZE__SHIFT | << SDMA0_RLC0_RB_CNTL__RB_SIZE__SHIFT |
q->vmid << SDMA0_RLC0_RB_CNTL__RB_VMID__SHIFT | q->vmid << SDMA0_RLC0_RB_CNTL__RB_VMID__SHIFT |
1 << SDMA0_RLC0_RB_CNTL__RPTR_WRITEBACK_ENABLE__SHIFT | 1 << SDMA0_RLC0_RB_CNTL__RPTR_WRITEBACK_ENABLE__SHIFT |
6 << SDMA0_RLC0_RB_CNTL__RPTR_WRITEBACK_TIMER__SHIFT; 6 << SDMA0_RLC0_RB_CNTL__RPTR_WRITEBACK_TIMER__SHIFT;
......
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