[PATCH v3] drm/amdkfd: optimize memory mapping latency
Eric Huang
jinhuieric.huang at amd.com
Tue Jun 1 21:30:06 UTC 2021
1. conditionally flush TLBs after map.
2. add heavy weight TLBs flush after unmap.
Signed-off-by: Eric Huang <jinhuieric.huang at amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h | 2 +-
.../gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 19 +++++++------
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 6 ++---
drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 2 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 10 +++----
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h | 2 +-
drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 27 +++++++++++--------
.../drm/amd/amdkfd/kfd_device_queue_manager.c | 6 ++---
drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 2 +-
drivers/gpu/drm/amd/amdkfd/kfd_process.c | 7 ++---
10 files changed, 46 insertions(+), 37 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
index 2560977760b3..8f2d6711e12f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
@@ -280,7 +280,7 @@ int amdgpu_amdkfd_gpuvm_free_memory_of_gpu(
struct kgd_dev *kgd, struct kgd_mem *mem, void *drm_priv,
uint64_t *size);
int amdgpu_amdkfd_gpuvm_map_memory_to_gpu(
- struct kgd_dev *kgd, struct kgd_mem *mem, void *drm_priv);
+ struct kgd_dev *kgd, struct kgd_mem *mem, void *drm_priv, bool *flush_tlb);
int amdgpu_amdkfd_gpuvm_unmap_memory_from_gpu(
struct kgd_dev *kgd, struct kgd_mem *mem, void *drm_priv);
int amdgpu_amdkfd_gpuvm_sync_memory(
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
index 1fcfa172911a..585b50b6009f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
@@ -1117,7 +1117,8 @@ static void unmap_bo_from_gpuvm(struct kgd_mem *mem,
static int update_gpuvm_pte(struct kgd_mem *mem,
struct kfd_mem_attachment *entry,
- struct amdgpu_sync *sync)
+ struct amdgpu_sync *sync,
+ bool *flush_tlb)
{
struct amdgpu_bo_va *bo_va = entry->bo_va;
struct amdgpu_device *adev = entry->adev;
@@ -1128,7 +1129,7 @@ static int update_gpuvm_pte(struct kgd_mem *mem,
return ret;
/* Update the page tables */
- ret = amdgpu_vm_bo_update(adev, bo_va, false);
+ ret = amdgpu_vm_bo_update(adev, bo_va, false, flush_tlb);
if (ret) {
pr_err("amdgpu_vm_bo_update failed\n");
return ret;
@@ -1140,7 +1141,8 @@ static int update_gpuvm_pte(struct kgd_mem *mem,
static int map_bo_to_gpuvm(struct kgd_mem *mem,
struct kfd_mem_attachment *entry,
struct amdgpu_sync *sync,
- bool no_update_pte)
+ bool no_update_pte,
+ bool *flush_tlb)
{
int ret;
@@ -1157,7 +1159,7 @@ static int map_bo_to_gpuvm(struct kgd_mem *mem,
if (no_update_pte)
return 0;
- ret = update_gpuvm_pte(mem, entry, sync);
+ ret = update_gpuvm_pte(mem, entry, sync, flush_tlb);
if (ret) {
pr_err("update_gpuvm_pte() failed\n");
goto update_gpuvm_pte_failed;
@@ -1687,7 +1689,8 @@ int amdgpu_amdkfd_gpuvm_free_memory_of_gpu(
}
int amdgpu_amdkfd_gpuvm_map_memory_to_gpu(
- struct kgd_dev *kgd, struct kgd_mem *mem, void *drm_priv)
+ struct kgd_dev *kgd, struct kgd_mem *mem,
+ void *drm_priv, bool *flush_tlb)
{
struct amdgpu_device *adev = get_amdgpu_device(kgd);
struct amdgpu_vm *avm = drm_priv_to_vm(drm_priv);
@@ -1775,7 +1778,7 @@ int amdgpu_amdkfd_gpuvm_map_memory_to_gpu(
entry->va, entry->va + bo_size, entry);
ret = map_bo_to_gpuvm(mem, entry, ctx.sync,
- is_invalid_userptr);
+ is_invalid_userptr, flush_tlb);
if (ret) {
pr_err("Failed to map bo to gpuvm\n");
goto out_unreserve;
@@ -2469,7 +2472,7 @@ static int validate_invalid_user_pages(struct amdkfd_process_info *process_info)
continue;
kfd_mem_dmaunmap_attachment(mem, attachment);
- ret = update_gpuvm_pte(mem, attachment, &sync);
+ ret = update_gpuvm_pte(mem, attachment, &sync, NULL);
if (ret) {
pr_err("%s: update PTE failed\n", __func__);
/* make sure this gets validated again */
@@ -2675,7 +2678,7 @@ int amdgpu_amdkfd_gpuvm_restore_process_bos(void *info, struct dma_fence **ef)
continue;
kfd_mem_dmaunmap_attachment(mem, attachment);
- ret = update_gpuvm_pte(mem, attachment, &sync_obj);
+ ret = update_gpuvm_pte(mem, attachment, &sync_obj, NULL);
if (ret) {
pr_debug("Memory eviction: update PTE failed. Try again\n");
goto validate_map_fail;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index e9f9f462a652..e3df132e53a5 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -916,7 +916,7 @@ static int amdgpu_cs_vm_handling(struct amdgpu_cs_parser *p)
if (r)
return r;
- r = amdgpu_vm_bo_update(adev, fpriv->prt_va, false);
+ r = amdgpu_vm_bo_update(adev, fpriv->prt_va, false, NULL);
if (r)
return r;
@@ -927,7 +927,7 @@ static int amdgpu_cs_vm_handling(struct amdgpu_cs_parser *p)
if (amdgpu_mcbp || amdgpu_sriov_vf(adev)) {
bo_va = fpriv->csa_va;
BUG_ON(!bo_va);
- r = amdgpu_vm_bo_update(adev, bo_va, false);
+ r = amdgpu_vm_bo_update(adev, bo_va, false, NULL);
if (r)
return r;
@@ -946,7 +946,7 @@ static int amdgpu_cs_vm_handling(struct amdgpu_cs_parser *p)
if (bo_va == NULL)
continue;
- r = amdgpu_vm_bo_update(adev, bo_va, false);
+ r = amdgpu_vm_bo_update(adev, bo_va, false, NULL);
if (r)
return r;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
index 2120a87a949f..eac2fd0048cc 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
@@ -696,7 +696,7 @@ static void amdgpu_gem_va_update_vm(struct amdgpu_device *adev,
if (operation == AMDGPU_VA_OP_MAP ||
operation == AMDGPU_VA_OP_REPLACE) {
- r = amdgpu_vm_bo_update(adev, bo_va, false);
+ r = amdgpu_vm_bo_update(adev, bo_va, false, NULL);
if (r)
goto error;
}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 2c20bba7dc1a..fed3d44b5ded 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -1729,7 +1729,7 @@ int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev,
r = vm->update_funcs->commit(¶ms, fence);
if (table_freed)
- *table_freed = params.table_freed;
+ *table_freed = *table_freed || params.table_freed;
error_unlock:
amdgpu_vm_eviction_unlock(vm);
@@ -1793,7 +1793,7 @@ void amdgpu_vm_get_memory(struct amdgpu_vm *vm, uint64_t *vram_mem,
* 0 for success, -EINVAL for failure.
*/
int amdgpu_vm_bo_update(struct amdgpu_device *adev, struct amdgpu_bo_va *bo_va,
- bool clear)
+ bool clear, bool *flush_tlb)
{
struct amdgpu_bo *bo = bo_va->base.bo;
struct amdgpu_vm *vm = bo_va->base.vm;
@@ -1887,7 +1887,7 @@ int amdgpu_vm_bo_update(struct amdgpu_device *adev, struct amdgpu_bo_va *bo_va,
resv, mapping->start,
mapping->last, update_flags,
mapping->offset, mem,
- pages_addr, last_update, NULL,
+ pages_addr, last_update, flush_tlb,
vram_base_offset);
if (r)
return r;
@@ -2141,7 +2141,7 @@ int amdgpu_vm_handle_moved(struct amdgpu_device *adev,
list_for_each_entry_safe(bo_va, tmp, &vm->moved, base.vm_status) {
/* Per VM BOs never need to bo cleared in the page tables */
- r = amdgpu_vm_bo_update(adev, bo_va, false);
+ r = amdgpu_vm_bo_update(adev, bo_va, false, NULL);
if (r)
return r;
}
@@ -2160,7 +2160,7 @@ int amdgpu_vm_handle_moved(struct amdgpu_device *adev,
else
clear = true;
- r = amdgpu_vm_bo_update(adev, bo_va, clear);
+ r = amdgpu_vm_bo_update(adev, bo_va, clear, NULL);
if (r)
return r;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
index 67bba8462e7d..24a63e284a69 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
@@ -419,7 +419,7 @@ int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev,
int amdgpu_vm_bo_update(struct amdgpu_device *adev,
struct amdgpu_bo_va *bo_va,
- bool clear);
+ bool clear, bool *flush_tlb);
bool amdgpu_vm_evictable(struct amdgpu_bo *bo);
void amdgpu_vm_bo_invalidate(struct amdgpu_device *adev,
struct amdgpu_bo *bo, bool evicted);
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
index 960913a35ee4..136f77cadc2f 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
@@ -1574,6 +1574,7 @@ static int kfd_ioctl_map_memory_to_gpu(struct file *filep,
long err = 0;
int i;
uint32_t *devices_arr = NULL;
+ bool flush_tlb = false;
trace_kfd_map_memory_to_gpu_start(p);
dev = kfd_device_by_id(GET_GPU_ID(args->handle));
@@ -1637,7 +1638,8 @@ static int kfd_ioctl_map_memory_to_gpu(struct file *filep,
goto map_memory_to_gpu_failed;
err = amdgpu_amdkfd_gpuvm_map_memory_to_gpu(
- peer->kgd, (struct kgd_mem *)mem, peer_pdd->drm_priv);
+ peer->kgd, (struct kgd_mem *)mem,
+ peer_pdd->drm_priv, &flush_tlb);
if (err) {
pr_err("Failed to map to gpu %d/%d\n",
i, args->n_devices);
@@ -1658,16 +1660,18 @@ static int kfd_ioctl_map_memory_to_gpu(struct file *filep,
}
/* Flush TLBs after waiting for the page table updates to complete */
- for (i = 0; i < args->n_devices; i++) {
- peer = kfd_device_by_id(devices_arr[i]);
- if (WARN_ON_ONCE(!peer))
- continue;
- peer_pdd = kfd_get_process_device_data(peer, p);
- if (WARN_ON_ONCE(!peer_pdd))
- continue;
- if (!amdgpu_read_lock(peer->ddev, true)) {
- kfd_flush_tlb(peer_pdd);
- amdgpu_read_unlock(peer->ddev);
+ if (flush_tlb) {
+ for (i = 0; i < args->n_devices; i++) {
+ peer = kfd_device_by_id(devices_arr[i]);
+ if (WARN_ON_ONCE(!peer))
+ continue;
+ peer_pdd = kfd_get_process_device_data(peer, p);
+ if (WARN_ON_ONCE(!peer_pdd))
+ continue;
+ if (!amdgpu_read_lock(peer->ddev, true)) {
+ kfd_flush_tlb(peer_pdd, TLB_FLUSH_LEGACY);
+ amdgpu_read_unlock(peer->ddev);
+ }
}
}
@@ -1766,6 +1770,7 @@ static int kfd_ioctl_unmap_memory_from_gpu(struct file *filep,
amdgpu_read_unlock(peer->ddev);
goto unmap_memory_from_gpu_failed;
}
+ kfd_flush_tlb(peer_pdd, TLB_FLUSH_HEAVYWEIGHT);
amdgpu_read_unlock(peer->ddev);
args->n_success = i+1;
}
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
index 2bd621eee4e0..904b8178c1d7 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
@@ -278,7 +278,7 @@ static int allocate_vmid(struct device_queue_manager *dqm,
qpd->vmid,
qpd->page_table_base);
/* invalidate the VM context after pasid and vmid mapping is set up */
- kfd_flush_tlb(qpd_to_pdd(qpd));
+ kfd_flush_tlb(qpd_to_pdd(qpd), TLB_FLUSH_LEGACY);
if (dqm->dev->kfd2kgd->set_scratch_backing_va)
dqm->dev->kfd2kgd->set_scratch_backing_va(dqm->dev->kgd,
@@ -314,7 +314,7 @@ static void deallocate_vmid(struct device_queue_manager *dqm,
if (flush_texture_cache_nocpsch(q->device, qpd))
pr_err("Failed to flush TC\n");
- kfd_flush_tlb(qpd_to_pdd(qpd));
+ kfd_flush_tlb(qpd_to_pdd(qpd), TLB_FLUSH_LEGACY);
/* Release the vmid mapping */
set_pasid_vmid_mapping(dqm, 0, qpd->vmid);
@@ -885,7 +885,7 @@ static int restore_process_queues_nocpsch(struct device_queue_manager *dqm,
dqm->dev->kgd,
qpd->vmid,
qpd->page_table_base);
- kfd_flush_tlb(pdd);
+ kfd_flush_tlb(pdd, TLB_FLUSH_LEGACY);
}
/* Take a safe reference to the mm_struct, which may otherwise
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
index ecdd5e782b81..edce3ecf207d 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
@@ -1338,7 +1338,7 @@ void kfd_signal_reset_event(struct kfd_dev *dev);
void kfd_signal_poison_consumed_event(struct kfd_dev *dev, u32 pasid);
-void kfd_flush_tlb(struct kfd_process_device *pdd);
+void kfd_flush_tlb(struct kfd_process_device *pdd, enum TLB_FLUSH_TYPE type);
int dbgdev_wave_reset_wavefronts(struct kfd_dev *dev, struct kfd_process *p);
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
index 3995002c582b..9708214116dc 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
@@ -689,7 +689,8 @@ static int kfd_process_alloc_gpuvm(struct kfd_process_device *pdd,
if (err)
goto err_alloc_mem;
- err = amdgpu_amdkfd_gpuvm_map_memory_to_gpu(kdev->kgd, mem, pdd->drm_priv);
+ err = amdgpu_amdkfd_gpuvm_map_memory_to_gpu(kdev->kgd, mem,
+ pdd->drm_priv, NULL);
if (err)
goto err_map_mem;
@@ -2159,7 +2160,7 @@ int kfd_reserved_mem_mmap(struct kfd_dev *dev, struct kfd_process *process,
KFD_CWSR_TBA_TMA_SIZE, vma->vm_page_prot);
}
-void kfd_flush_tlb(struct kfd_process_device *pdd)
+void kfd_flush_tlb(struct kfd_process_device *pdd, enum TLB_FLUSH_TYPE type)
{
struct kfd_dev *dev = pdd->dev;
@@ -2172,7 +2173,7 @@ void kfd_flush_tlb(struct kfd_process_device *pdd)
pdd->qpd.vmid);
} else {
amdgpu_amdkfd_flush_gpu_tlb_pasid(dev->kgd,
- pdd->process->pasid, TLB_FLUSH_LEGACY);
+ pdd->process->pasid, type);
}
}
--
2.25.1
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