It is easy to cause performance drop issue when using lock in low level
functions.
Signed-off-by: Dennis Li <Dennis.Li@xxxxxxx>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 0b1e0127056f..24ff5992cb02 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -374,13 +374,10 @@ uint32_t amdgpu_device_rreg(struct amdgpu_device *adev,
if ((reg * 4) < adev->rmmio_size) {
if (!(acc_flags & AMDGPU_REGS_NO_KIQ) &&
- amdgpu_sriov_runtime(adev) &&
- down_read_trylock(&adev->reset_sem)) {
+ amdgpu_sriov_runtime(adev))
ret = amdgpu_kiq_rreg(adev, reg);
- up_read(&adev->reset_sem);
- } else {
+ else
ret = readl(((void __iomem *)adev->rmmio) + (reg * 4));
- }
} else {
ret = adev->pcie_rreg(adev, reg * 4);
}
@@ -459,13 +456,10 @@ void amdgpu_device_wreg(struct amdgpu_device *adev,
if ((reg * 4) < adev->rmmio_size) {
if (!(acc_flags & AMDGPU_REGS_NO_KIQ) &&
- amdgpu_sriov_runtime(adev) &&
- down_read_trylock(&adev->reset_sem)) {
+ amdgpu_sriov_runtime(adev))
amdgpu_kiq_wreg(adev, reg, v);
- up_read(&adev->reset_sem);
- } else {
+ else
writel(v, ((void __iomem *)adev->rmmio) + (reg * 4));
- }
} else {
adev->pcie_wreg(adev, reg * 4, v);
}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c
index a05dbbbd9803..9f6eaca107ab 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c
@@ -155,11 +155,7 @@ static int __update_table_header(struct amdgpu_ras_eeprom_control *control,
msg.addr = control->i2c_address;
- /* i2c may be unstable in gpu reset */
- down_read(&adev->reset_sem);
ret = i2c_transfer(&adev->pm.smu_i2c, &msg, 1);
- up_read(&adev->reset_sem);
-
if (ret < 1)
DRM_ERROR("Failed to write EEPROM table header, ret:%d", ret);
@@ -546,11 +542,7 @@ int amdgpu_ras_eeprom_process_recods(struct amdgpu_ras_eeprom_control *control,
control->next_addr += EEPROM_TABLE_RECORD_SIZE;
}
- /* i2c may be unstable in gpu reset */
- down_read(&adev->reset_sem);
ret = i2c_transfer(&adev->pm.smu_i2c, msgs, num);
- up_read(&adev->reset_sem);
-
if (ret < 1) {
DRM_ERROR("Failed to process EEPROM table records, ret:%d", ret);
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c
index 33e54eed2eec..690f368ce378 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c
@@ -317,8 +317,7 @@ static void gmc_v10_0_flush_gpu_tlb(struct amdgpu_device *adev, uint32_t vmid,
* Directly use kiq to do the vm invalidation instead
*/
if (adev->gfx.kiq.ring.sched.ready &&
- (amdgpu_sriov_runtime(adev) || !amdgpu_sriov_vf(adev)) &&
- down_read_trylock(&adev->reset_sem)) {
+ (amdgpu_sriov_runtime(adev) || !amdgpu_sriov_vf(adev))) {
struct amdgpu_vmhub *hub = &adev->vmhub[vmhub];
const unsigned eng = 17;
u32 inv_req = hub->vmhub_funcs->get_invalidate_req(vmid, flush_type);
@@ -328,7 +327,6 @@ static void gmc_v10_0_flush_gpu_tlb(struct amdgpu_device *adev, uint32_t vmid,
amdgpu_virt_kiq_reg_write_reg_wait(adev, req, ack, inv_req,
1 << vmid);
- up_read(&adev->reset_sem);
return;
}
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
index 1567dd227f51..ec3c05360776 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -757,14 +757,12 @@ static void gmc_v9_0_flush_gpu_tlb(struct amdgpu_device *adev, uint32_t vmid,
* as GFXOFF under bare metal
*/
if (adev->gfx.kiq.ring.sched.ready &&
- (amdgpu_sriov_runtime(adev) || !amdgpu_sriov_vf(adev)) &&
- down_read_trylock(&adev->reset_sem)) {
+ (amdgpu_sriov_runtime(adev) || !amdgpu_sriov_vf(adev))) {
uint32_t req = hub->vm_inv_eng0_req + hub->eng_distance * eng;
uint32_t ack = hub->vm_inv_eng0_ack + hub->eng_distance * eng;
amdgpu_virt_kiq_reg_write_reg_wait(adev, req, ack, inv_req,
1 << vmid);
- up_read(&adev->reset_sem);
return;
}
@@ -859,7 +857,7 @@ static int gmc_v9_0_flush_gpu_tlb_pasid(struct amdgpu_device *adev,
if (amdgpu_in_reset(adev))
return -EIO;
- if (ring->sched.ready && down_read_trylock(&adev->reset_sem)) {
+ if (ring->sched.ready) {
/* Vega20+XGMI caches PTEs in TC and TLB. Add a
* heavy-weight TLB flush (type 2), which flushes
* both. Due to a race condition with concurrent
@@ -886,7 +884,6 @@ static int gmc_v9_0_flush_gpu_tlb_pasid(struct amdgpu_device *adev,
if (r) {
amdgpu_ring_undo(ring);
spin_unlock(&adev->gfx.kiq.ring_lock);
- up_read(&adev->reset_sem);
return -ETIME;
}
@@ -895,10 +892,8 @@ static int gmc_v9_0_flush_gpu_tlb_pasid(struct amdgpu_device *adev,
r = amdgpu_fence_wait_polling(ring, seq, adev->usec_timeout);
if (r < 1) {
dev_err(adev->dev, "wait for kiq fence error: %ld.\n", r);
- up_read(&adev->reset_sem);
return -ETIME;
}
- up_read(&adev->reset_sem);
return 0;
}
--
2.17.1
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