[PATCH 1/2] drm/amdkfd: correct RB_SIZE in SDMA0_QUEUE0_RB_CNTL

[Yifan Zhang]

In SDMA0_QUEUE0_RB_CNTL, queue size is 2^RB_SIZE, not 2^(RB_SIZE +1).

Signed-off-by: Yifan Zhang <yifan1.zhang at amd.com>
---
 drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v10.c | 2 +-
 drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v11.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v10.c b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v10.c
index d3e2b6a599a4..03699a9ad3d9 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v10.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v10.c
@@ -329,7 +329,7 @@ static void update_mqd_sdma(struct mqd_manager *mm, void *mqd,
 	struct v10_sdma_mqd *m;
 
 	m = get_sdma_mqd(mqd);
-	m->sdmax_rlcx_rb_cntl = (ffs(q->queue_size / sizeof(unsigned int)) - 1)
+	m->sdmax_rlcx_rb_cntl = order_base_2(q->queue_size / 4)
 		<< SDMA0_RLC0_RB_CNTL__RB_SIZE__SHIFT |
 		q->vmid << SDMA0_RLC0_RB_CNTL__RB_VMID__SHIFT |
 		1 << SDMA0_RLC0_RB_CNTL__RPTR_WRITEBACK_ENABLE__SHIFT |
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v11.c b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v11.c
index 26b53b6d673e..451fcb9bb051 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v11.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v11.c
@@ -329,7 +329,7 @@ static void update_mqd_sdma(struct mqd_manager *mm, void *mqd,
 	struct v11_sdma_mqd *m;
 
 	m = get_sdma_mqd(mqd);
-	m->sdmax_rlcx_rb_cntl = (ffs(q->queue_size / sizeof(unsigned int)) - 1)
+	m->sdmax_rlcx_rb_cntl = order_base_2(q->queue_size / 4)
 		<< SDMA0_QUEUE0_RB_CNTL__RB_SIZE__SHIFT |
 		q->vmid << SDMA0_QUEUE0_RB_CNTL__RB_VMID__SHIFT |
 		1 << SDMA0_QUEUE0_RB_CNTL__RPTR_WRITEBACK_ENABLE__SHIFT |
-- 
2.37.3