To make a amdgpu vm to a compute vm, the old pasid will be freed and
replaced with a pasid managed by kfd. Kfd can't reuse original pasid
allocated by amdgpu because kfd uses different pasid policy with amdgpu.
For example, all graphic devices share one same pasid in a process.
Signed-off-by: Oak Zeng <oak.z...@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h | 6 ++---
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 10 +++----
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 33 +++++++++++++++++++++---
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h | 2 +-
drivers/gpu/drm/amd/amdkfd/kfd_process.c | 4 +--
drivers/gpu/drm/amd/include/kgd_kfd_interface.h | 5 ++--
6 files changed, 43 insertions(+), 17 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
index a8418a3..e1f6454 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
@@ -155,11 +155,11 @@ uint64_t amdgpu_amdkfd_get_vram_usage(struct kgd_dev
*kgd);
})
/* GPUVM API */
-int amdgpu_amdkfd_gpuvm_create_process_vm(struct kgd_dev *kgd, void **vm,
- void **process_info,
+int amdgpu_amdkfd_gpuvm_create_process_vm(struct kgd_dev *kgd, unsigned int
pasid,
+ void **vm, void **process_info,
struct dma_fence **ef);
int amdgpu_amdkfd_gpuvm_acquire_process_vm(struct kgd_dev *kgd,
- struct file *filp,
+ struct file *filp, unsigned int pasid,
void **vm, void **process_info,
struct dma_fence **ef);
void amdgpu_amdkfd_gpuvm_destroy_cb(struct amdgpu_device *adev,
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
index 7eadc58..0980a1f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
@@ -1003,8 +1003,8 @@ static int init_kfd_vm(struct amdgpu_vm *vm, void
**process_info,
return ret;
}
-int amdgpu_amdkfd_gpuvm_create_process_vm(struct kgd_dev *kgd, void **vm,
- void **process_info,
+int amdgpu_amdkfd_gpuvm_create_process_vm(struct kgd_dev *kgd, unsigned int
pasid,
+ void **vm, void **process_info,
struct dma_fence **ef)
{
struct amdgpu_device *adev = get_amdgpu_device(kgd);
@@ -1016,7 +1016,7 @@ int amdgpu_amdkfd_gpuvm_create_process_vm(struct kgd_dev
*kgd, void **vm,
return -ENOMEM;
/* Initialize AMDGPU part of the VM */
- ret = amdgpu_vm_init(adev, new_vm, AMDGPU_VM_CONTEXT_COMPUTE, 0);
+ ret = amdgpu_vm_init(adev, new_vm, AMDGPU_VM_CONTEXT_COMPUTE, pasid);
if (ret) {
pr_err("Failed init vm ret %d\n", ret);
goto amdgpu_vm_init_fail;
@@ -1039,7 +1039,7 @@ int amdgpu_amdkfd_gpuvm_create_process_vm(struct kgd_dev
*kgd, void **vm,
}
int amdgpu_amdkfd_gpuvm_acquire_process_vm(struct kgd_dev *kgd,
- struct file *filp,
+ struct file *filp, unsigned int
pasid,
void **vm, void **process_info,
struct dma_fence **ef)
{
@@ -1054,7 +1054,7 @@ int amdgpu_amdkfd_gpuvm_acquire_process_vm(struct kgd_dev
*kgd,
return -EINVAL;
/* Convert VM into a compute VM */
- ret = amdgpu_vm_make_compute(adev, avm);
+ ret = amdgpu_vm_make_compute(adev, avm, pasid);
if (ret)
return ret;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 662aec5..d8a99f4 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -2690,7 +2690,7 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct
amdgpu_vm *vm,
* Returns:
* 0 for success, -errno for errors.
*/
-int amdgpu_vm_make_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm)
+int amdgpu_vm_make_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm,
unsigned int pasid)
{
bool pte_support_ats = (adev->asic_type == CHIP_RAVEN);
int r;
@@ -2702,7 +2702,20 @@ int amdgpu_vm_make_compute(struct amdgpu_device *adev,
struct amdgpu_vm *vm)
/* Sanity checks */
if (!RB_EMPTY_ROOT(&vm->va.rb_root) || vm->root.entries) {
r = -EINVAL;
- goto error;
+ goto unreserve_bo;
+ }
+
+ if (pasid) {
+ unsigned long flags;
+
+ spin_lock_irqsave(&adev->vm_manager.pasid_lock, flags);
+ r = idr_alloc(&adev->vm_manager.pasid_idr, vm, pasid, pasid + 1,
+ GFP_ATOMIC);
+ spin_unlock_irqrestore(&adev->vm_manager.pasid_lock, flags);
+
+ if (r == -ENOSPC)
+ goto unreserve_bo;
+ r = 0;
}
/* Check if PD needs to be reinitialized and do it before
@@ -2713,7 +2726,7 @@ int amdgpu_vm_make_compute(struct amdgpu_device *adev,
struct amdgpu_vm *vm)
adev->vm_manager.root_level,
pte_support_ats);
if (r)
- goto error;
+ goto free_idr;
}
/* Update VM state */
@@ -2732,10 +2745,22 @@ int amdgpu_vm_make_compute(struct amdgpu_device *adev,
struct amdgpu_vm *vm)
idr_remove(&adev->vm_manager.pasid_idr, vm->pasid);
spin_unlock_irqrestore(&adev->vm_manager.pasid_lock, flags);
+ /* Free the original amdgpu allocated pasid
+ * Will be replaced with kfd allocated pasid
+ */
+ amdgpu_pasid_free(vm->pasid);
vm->pasid = 0;
}
-error:
+ if (pasid)
+ vm->pasid = pasid;
+
+ goto unreserve_bo;
+
+free_idr:
+ if (pasid)
+ idr_remove(&adev->vm_manager.pasid_idr, pasid);
+unreserve_bo:
amdgpu_bo_unreserve(vm->root.base.bo);
return r;
}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
index 1162c2b..c68945d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
@@ -294,7 +294,7 @@ void amdgpu_vm_manager_init(struct amdgpu_device *adev);
void amdgpu_vm_manager_fini(struct amdgpu_device *adev);
int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm,
int vm_context, unsigned int pasid);
-int amdgpu_vm_make_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm);
+int amdgpu_vm_make_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm,
unsigned int pasid);
void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm);
bool amdgpu_vm_pasid_fault_credit(struct amdgpu_device *adev,
unsigned int pasid);
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c
b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
index 1d80b4f..5f559c5 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
@@ -685,11 +685,11 @@ int kfd_process_device_init_vm(struct kfd_process_device
*pdd,
if (drm_file)
ret = dev->kfd2kgd->acquire_process_vm(
- dev->kgd, drm_file,
+ dev->kgd, drm_file, p->pasid,
&pdd->vm, &p->kgd_process_info, &p->ef);
else
ret = dev->kfd2kgd->create_process_vm(
- dev->kgd, &pdd->vm, &p->kgd_process_info, &p->ef);
+ dev->kgd, p->pasid, &pdd->vm, &p->kgd_process_info,
&p->ef);
if (ret) {
pr_err("Failed to create process VM object\n");
return ret;
diff --git a/drivers/gpu/drm/amd/include/kgd_kfd_interface.h
b/drivers/gpu/drm/amd/include/kgd_kfd_interface.h
index 5733fbe..1632869 100644
--- a/drivers/gpu/drm/amd/include/kgd_kfd_interface.h
+++ b/drivers/gpu/drm/amd/include/kgd_kfd_interface.h
@@ -346,10 +346,11 @@ struct kfd2kgd_calls {
struct kfd_cu_info *cu_info);
uint64_t (*get_vram_usage)(struct kgd_dev *kgd);
- int (*create_process_vm)(struct kgd_dev *kgd, void **vm,
+ int (*create_process_vm)(struct kgd_dev *kgd, unsigned int pasid, void
**vm,
void **process_info, struct dma_fence **ef);
int (*acquire_process_vm)(struct kgd_dev *kgd, struct file *filp,
- void **vm, void **process_info, struct dma_fence **ef);
+ unsigned int pasid, void **vm, void **process_info,
+ struct dma_fence **ef);
void (*destroy_process_vm)(struct kgd_dev *kgd, void *vm);
uint32_t (*get_process_page_dir)(void *vm);
void (*set_vm_context_page_table_base)(struct kgd_dev *kgd,
--
2.7.4
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