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From 0e67cbf8dba1e647d10d1c89bdba217f22c818ea Mon Sep 17 00:00:00 2001
From: Felix Kuehling <Felix.Kuehling@amd.com>
Date: Mon, 6 Nov 2017 14:52:28 -0500
Subject: [PATCH 3396/4131] drm/amdkfd: Use order_base_2 to get log2 of buffes
sizes
Replace (ffs(size) - 1) with order_base_2(size) as a more straight
forward way to get log2 of buffer sizes.
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
---
drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_cik.c | 6 +++---
drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_vi.c | 6 +++---
2 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_cik.c b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_cik.c
index efed6ef..7aa57ab 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_cik.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_cik.c
@@ -183,7 +183,7 @@ static int update_mqd(struct mqd_manager *mm, void *mqd,
* Calculating queue size which is log base 2 of actual queue size -1
* dwords and another -1 for ffs
*/
- m->cp_hqd_pq_control |= ffs(q->queue_size / 4) - 1 - 1;
+ m->cp_hqd_pq_control |= order_base_2(q->queue_size / 4) - 1;
m->cp_hqd_pq_base_lo = lower_32_bits((uint64_t)q->queue_address >> 8);
m->cp_hqd_pq_base_hi = upper_32_bits((uint64_t)q->queue_address >> 8);
m->cp_hqd_pq_rptr_report_addr_lo = lower_32_bits((uint64_t)q->read_ptr);
@@ -208,7 +208,7 @@ static int update_mqd_sdma(struct mqd_manager *mm, void *mqd,
struct cik_sdma_rlc_registers *m;
m = get_sdma_mqd(mqd);
- m->sdma_rlc_rb_cntl = (ffs(q->queue_size / 4) - 1)
+ m->sdma_rlc_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 |
@@ -349,7 +349,7 @@ static int update_mqd_hiq(struct mqd_manager *mm, void *mqd,
* Calculating queue size which is log base 2 of actual queue
* size -1 dwords
*/
- m->cp_hqd_pq_control |= ffs(q->queue_size / 4) - 1 - 1;
+ m->cp_hqd_pq_control |= order_base_2(q->queue_size / 4) - 1;
m->cp_hqd_pq_base_lo = lower_32_bits((uint64_t)q->queue_address >> 8);
m->cp_hqd_pq_base_hi = upper_32_bits((uint64_t)q->queue_address >> 8);
m->cp_hqd_pq_rptr_report_addr_lo = lower_32_bits((uint64_t)q->read_ptr);
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_vi.c b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_vi.c
index 85e1b67..2ba7cea 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_vi.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_vi.c
@@ -121,7 +121,7 @@ static int __update_mqd(struct mqd_manager *mm, void *mqd,
m->cp_hqd_pq_control = 5 << CP_HQD_PQ_CONTROL__RPTR_BLOCK_SIZE__SHIFT |
atc_bit << CP_HQD_PQ_CONTROL__PQ_ATC__SHIFT |
mtype << CP_HQD_PQ_CONTROL__MTYPE__SHIFT;
- m->cp_hqd_pq_control |= ffs(q->queue_size / 4) - 1 - 1;
+ m->cp_hqd_pq_control |= order_base_2(q->queue_size / 4) - 1;
pr_debug("cp_hqd_pq_control 0x%x\n", m->cp_hqd_pq_control);
m->cp_hqd_pq_base_lo = lower_32_bits((uint64_t)q->queue_address >> 8);
@@ -151,7 +151,7 @@ static int __update_mqd(struct mqd_manager *mm, void *mqd,
* is safe, giving a maximum field value of 0xA.
*/
m->cp_hqd_eop_control |= min(0xA,
- ffs(q->eop_ring_buffer_size / 4) - 1 - 1);
+ order_base_2(q->eop_ring_buffer_size / 4) - 1);
m->cp_hqd_eop_base_addr_lo =
lower_32_bits(q->eop_ring_buffer_address >> 8);
m->cp_hqd_eop_base_addr_hi =
@@ -287,7 +287,7 @@ static int update_mqd_sdma(struct mqd_manager *mm, void *mqd,
struct vi_sdma_mqd *m;
m = get_sdma_mqd(mqd);
- m->sdmax_rlcx_rb_cntl = (ffs(q->queue_size / 4) - 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 |
--
2.7.4
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