[PATCH 1/7] drm/amdgpu: add amdgpu_bo_vm bo type

[PATCH 1/7] drm/amdgpu: add amdgpu_bo_vm bo type

[Nirmoy Das]

Add new BO subclass that will be used by amdgpu vm code.

Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 32 ++++++++++++++++++++++
 drivers/gpu/drm/amd/amdgpu/amdgpu_object.h | 10 +++++++
 2 files changed, 42 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 3f85ba8222ef..6870cc297ae6 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -694,6 +694,38 @@ int amdgpu_bo_create_user(struct amdgpu_device *adev,
 	*ubo_ptr = to_amdgpu_bo_user(bo_ptr);
 	return r;
 }
+
+/**
+ * amdgpu_bo_create_vm - create an &amdgpu_bo_vm buffer object
+ * @adev: amdgpu device object
+ * @bp: parameters to be used for the buffer object
+ * @vmbo_ptr: pointer to the buffer object pointer
+ *
+ * Create a BO to be for GPUVM.
+ *
+ * Returns:
+ * 0 for success or a negative error code on failure.
+ */
+
+int amdgpu_bo_create_vm(struct amdgpu_device *adev,
+			struct amdgpu_bo_param *bp,
+			struct amdgpu_bo_vm **vmbo_ptr)
+{
+	struct amdgpu_bo *bo_ptr;
+	int r;
+
+	/* bo_ptr_size will be determined by the caller and it depends on
+	 * num of amdgpu_vm_pt entries.
+	 */
+	BUG_ON(bp->bo_ptr_size < sizeof(struct amdgpu_bo_vm));
+	r = amdgpu_bo_create(adev, bp, &bo_ptr);
+	if (r)
+		return r;
+
+	*vmbo_ptr = to_amdgpu_bo_vm(bo_ptr);
+	return r;
+}
+
 /**
  * amdgpu_bo_validate - validate an &amdgpu_bo buffer object
  * @bo: pointer to the buffer object
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
index 11480c5a2716..a7fbf5f7051e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
@@ -44,6 +44,7 @@
 #define AMDGPU_AMDKFD_CREATE_SVM_BO	(1ULL << 62)
 
 #define to_amdgpu_bo_user(abo) container_of((abo), struct amdgpu_bo_user, bo)
+#define to_amdgpu_bo_vm(abo) container_of((abo), struct amdgpu_bo_vm, bo)
 
 struct amdgpu_bo_param {
 	unsigned long			size;
@@ -125,6 +126,12 @@ struct amdgpu_bo_user {
 
 };
 
+struct amdgpu_bo_vm {
+	struct amdgpu_bo		bo;
+	struct amdgpu_bo		*shadow;
+	struct amdgpu_vm_pt             entries[];
+};
+
 static inline struct amdgpu_bo *ttm_to_amdgpu_bo(struct ttm_buffer_object *tbo)
 {
 	return container_of(tbo, struct amdgpu_bo, tbo);
@@ -272,6 +279,9 @@ int amdgpu_bo_create_kernel_at(struct amdgpu_device *adev,
 int amdgpu_bo_create_user(struct amdgpu_device *adev,
 			  struct amdgpu_bo_param *bp,
 			  struct amdgpu_bo_user **ubo_ptr);
+int amdgpu_bo_create_vm(struct amdgpu_device *adev,
+			struct amdgpu_bo_param *bp,
+			struct amdgpu_bo_vm **ubo_ptr);
 void amdgpu_bo_free_kernel(struct amdgpu_bo **bo, u64 *gpu_addr,
 			   void **cpu_addr);
 int amdgpu_bo_create_shadow(struct amdgpu_device *adev,
-- 
2.31.1

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[PATCH 2/7] drm/amdgpu: move shadow bo validation to VM code

[Nirmoy Das]

Do the shadow bo validation in the VM code as
VM code knows/owns shadow BOs.

Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 23 ++++-------------------
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c |  5 +++++
 2 files changed, 9 insertions(+), 19 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index 90136f9dedd6..f6a8f0c5a52f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -396,10 +396,10 @@ void amdgpu_cs_report_moved_bytes(struct amdgpu_device *adev, u64 num_bytes,
 	spin_unlock(&adev->mm_stats.lock);
 }
 
-static int amdgpu_cs_bo_validate(struct amdgpu_cs_parser *p,
-				 struct amdgpu_bo *bo)
+static int amdgpu_cs_bo_validate(void *param, struct amdgpu_bo *bo)
 {
 	struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
+	struct amdgpu_cs_parser *p = param;
 	struct ttm_operation_ctx ctx = {
 		.interruptible = true,
 		.no_wait_gpu = false,
@@ -451,21 +451,6 @@ static int amdgpu_cs_bo_validate(struct amdgpu_cs_parser *p,
 	return r;
 }
 
-static int amdgpu_cs_validate(void *param, struct amdgpu_bo *bo)
-{
-	struct amdgpu_cs_parser *p = param;
-	int r;
-
-	r = amdgpu_cs_bo_validate(p, bo);
-	if (r)
-		return r;
-
-	if (bo->shadow)
-		r = amdgpu_cs_bo_validate(p, bo->shadow);
-
-	return r;
-}
-
 static int amdgpu_cs_list_validate(struct amdgpu_cs_parser *p,
 			    struct list_head *validated)
 {
@@ -493,7 +478,7 @@ static int amdgpu_cs_list_validate(struct amdgpu_cs_parser *p,
 						     lobj->user_pages);
 		}
 
-		r = amdgpu_cs_validate(p, bo);
+		r = amdgpu_cs_bo_validate(p, bo);
 		if (r)
 			return r;
 
@@ -593,7 +578,7 @@ static int amdgpu_cs_parser_bos(struct amdgpu_cs_parser *p,
 	p->bytes_moved_vis = 0;
 
 	r = amdgpu_vm_validate_pt_bos(p->adev, &fpriv->vm,
-				      amdgpu_cs_validate, p);
+				      amdgpu_cs_bo_validate, p);
 	if (r) {
 		DRM_ERROR("amdgpu_vm_validate_pt_bos() failed.\n");
 		goto error_validate;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index da155c276c51..f474f15ba344 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -696,6 +696,11 @@ int amdgpu_vm_validate_pt_bos(struct amdgpu_device *adev, struct amdgpu_vm *vm,
 		r = validate(param, bo);
 		if (r)
 			return r;
+		if (bo->shadow) {
+			r = validate(param, bo);
+			if (r)
+				return r;
+		}
 
 		if (bo->tbo.type != ttm_bo_type_kernel) {
 			amdgpu_vm_bo_moved(bo_base);
-- 
2.31.1

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Re: [PATCH 2/7] drm/amdgpu: move shadow bo validation to VM code

[Christian König]

Am 26.05.21 um 12:10 schrieb Nirmoy Das:
> Do the shadow bo validation in the VM code as
> VM code knows/owns shadow BOs.
>
> Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 23 ++++-------------------
>   drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c |  5 +++++
>   2 files changed, 9 insertions(+), 19 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> index 90136f9dedd6..f6a8f0c5a52f 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> @@ -396,10 +396,10 @@ void amdgpu_cs_report_moved_bytes(struct amdgpu_device *adev, u64 num_bytes,
>   	spin_unlock(&adev->mm_stats.lock);
>   }
>   
> -static int amdgpu_cs_bo_validate(struct amdgpu_cs_parser *p,
> -				 struct amdgpu_bo *bo)
> +static int amdgpu_cs_bo_validate(void *param, struct amdgpu_bo *bo)
>   {
>   	struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
> +	struct amdgpu_cs_parser *p = param;
>   	struct ttm_operation_ctx ctx = {
>   		.interruptible = true,
>   		.no_wait_gpu = false,
> @@ -451,21 +451,6 @@ static int amdgpu_cs_bo_validate(struct amdgpu_cs_parser *p,
>   	return r;
>   }
>   
> -static int amdgpu_cs_validate(void *param, struct amdgpu_bo *bo)
> -{
> -	struct amdgpu_cs_parser *p = param;
> -	int r;
> -
> -	r = amdgpu_cs_bo_validate(p, bo);
> -	if (r)
> -		return r;
> -
> -	if (bo->shadow)
> -		r = amdgpu_cs_bo_validate(p, bo->shadow);
> -
> -	return r;
> -}
> -
>   static int amdgpu_cs_list_validate(struct amdgpu_cs_parser *p,
>   			    struct list_head *validated)
>   {
> @@ -493,7 +478,7 @@ static int amdgpu_cs_list_validate(struct amdgpu_cs_parser *p,
>   						     lobj->user_pages);
>   		}
>   
> -		r = amdgpu_cs_validate(p, bo);
> +		r = amdgpu_cs_bo_validate(p, bo);
>   		if (r)
>   			return r;
>   
> @@ -593,7 +578,7 @@ static int amdgpu_cs_parser_bos(struct amdgpu_cs_parser *p,
>   	p->bytes_moved_vis = 0;
>   
>   	r = amdgpu_vm_validate_pt_bos(p->adev, &fpriv->vm,
> -				      amdgpu_cs_validate, p);
> +				      amdgpu_cs_bo_validate, p);
>   	if (r) {
>   		DRM_ERROR("amdgpu_vm_validate_pt_bos() failed.\n");
>   		goto error_validate;
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> index da155c276c51..f474f15ba344 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> @@ -696,6 +696,11 @@ int amdgpu_vm_validate_pt_bos(struct amdgpu_device *adev, struct amdgpu_vm *vm,
>   		r = validate(param, bo);
>   		if (r)
>   			return r;
> +		if (bo->shadow) {
> +			r = validate(param, bo);

This needs to be "validate(param, bo->shadow)".

Apart from that looks good to me.

Christian.

> +			if (r)
> +				return r;
> +		}
>   
>   		if (bo->tbo.type != ttm_bo_type_kernel) {
>   			amdgpu_vm_bo_moved(bo_base);

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RE: [PATCH 2/7] drm/amdgpu: move shadow bo validation to VM code

[Das, Nirmoy]

[AMD Official Use Only]

Thanks Christian, I found some more issues as well, I will update and resend again.

-----Original Message-----
From: Koenig, Christian <Christian.Koenig@amd.com> 
Sent: Wednesday, May 26, 2021 2:03 PM
To: Das, Nirmoy <Nirmoy.Das@amd.com>; amd-gfx@lists.freedesktop.org
Cc: Deucher, Alexander <Alexander.Deucher@amd.com>
Subject: Re: [PATCH 2/7] drm/amdgpu: move shadow bo validation to VM code

Am 26.05.21 um 12:10 schrieb Nirmoy Das:
> Do the shadow bo validation in the VM code as VM code knows/owns 
> shadow BOs.
>
> Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 23 ++++-------------------
>   drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c |  5 +++++
>   2 files changed, 9 insertions(+), 19 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c 
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> index 90136f9dedd6..f6a8f0c5a52f 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> @@ -396,10 +396,10 @@ void amdgpu_cs_report_moved_bytes(struct amdgpu_device *adev, u64 num_bytes,
>   	spin_unlock(&adev->mm_stats.lock);
>   }
>   
> -static int amdgpu_cs_bo_validate(struct amdgpu_cs_parser *p,
> -				 struct amdgpu_bo *bo)
> +static int amdgpu_cs_bo_validate(void *param, struct amdgpu_bo *bo)
>   {
>   	struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
> +	struct amdgpu_cs_parser *p = param;
>   	struct ttm_operation_ctx ctx = {
>   		.interruptible = true,
>   		.no_wait_gpu = false,
> @@ -451,21 +451,6 @@ static int amdgpu_cs_bo_validate(struct amdgpu_cs_parser *p,
>   	return r;
>   }
>   
> -static int amdgpu_cs_validate(void *param, struct amdgpu_bo *bo) -{
> -	struct amdgpu_cs_parser *p = param;
> -	int r;
> -
> -	r = amdgpu_cs_bo_validate(p, bo);
> -	if (r)
> -		return r;
> -
> -	if (bo->shadow)
> -		r = amdgpu_cs_bo_validate(p, bo->shadow);
> -
> -	return r;
> -}
> -
>   static int amdgpu_cs_list_validate(struct amdgpu_cs_parser *p,
>   			    struct list_head *validated)
>   {
> @@ -493,7 +478,7 @@ static int amdgpu_cs_list_validate(struct amdgpu_cs_parser *p,
>   						     lobj->user_pages);
>   		}
>   
> -		r = amdgpu_cs_validate(p, bo);
> +		r = amdgpu_cs_bo_validate(p, bo);
>   		if (r)
>   			return r;
>   
> @@ -593,7 +578,7 @@ static int amdgpu_cs_parser_bos(struct amdgpu_cs_parser *p,
>   	p->bytes_moved_vis = 0;
>   
>   	r = amdgpu_vm_validate_pt_bos(p->adev, &fpriv->vm,
> -				      amdgpu_cs_validate, p);
> +				      amdgpu_cs_bo_validate, p);
>   	if (r) {
>   		DRM_ERROR("amdgpu_vm_validate_pt_bos() failed.\n");
>   		goto error_validate;
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c 
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> index da155c276c51..f474f15ba344 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> @@ -696,6 +696,11 @@ int amdgpu_vm_validate_pt_bos(struct amdgpu_device *adev, struct amdgpu_vm *vm,
>   		r = validate(param, bo);
>   		if (r)
>   			return r;
> +		if (bo->shadow) {
> +			r = validate(param, bo);

This needs to be "validate(param, bo->shadow)".

Apart from that looks good to me.

Christian.

> +			if (r)
> +				return r;
> +		}
>   
>   		if (bo->tbo.type != ttm_bo_type_kernel) {
>   			amdgpu_vm_bo_moved(bo_base);
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[PATCH 3/7] drm/amdgpu: use amdgpu_bo_vm for vm code

[Nirmoy Das]

Use amdgpu_bo_vm subclass for creating BOs related to PD/PT.

Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 43 ++++++++++++++------------
 1 file changed, 24 insertions(+), 19 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index f474f15ba344..2c97d67d9cfc 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -868,9 +868,10 @@ static int amdgpu_vm_clear_bo(struct amdgpu_device *adev,
 static int amdgpu_vm_pt_create(struct amdgpu_device *adev,
 			       struct amdgpu_vm *vm,
 			       int level, bool immediate,
-			       struct amdgpu_bo **bo)
+			       struct amdgpu_bo_vm **vmbo)
 {
 	struct amdgpu_bo_param bp;
+	struct amdgpu_bo *bo;
 	int r;
 
 	memset(&bp, 0, sizeof(bp));
@@ -881,7 +882,7 @@ static int amdgpu_vm_pt_create(struct amdgpu_device *adev,
 	bp.domain = amdgpu_bo_get_preferred_pin_domain(adev, bp.domain);
 	bp.flags = AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS |
 		AMDGPU_GEM_CREATE_CPU_GTT_USWC;
-	bp.bo_ptr_size = sizeof(struct amdgpu_bo);
+	bp.bo_ptr_size = sizeof(struct amdgpu_bo_vm);
 	if (vm->use_cpu_for_update)
 		bp.flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
 
@@ -890,23 +891,24 @@ static int amdgpu_vm_pt_create(struct amdgpu_device *adev,
 	if (vm->root.base.bo)
 		bp.resv = vm->root.base.bo->tbo.base.resv;
 
-	r = amdgpu_bo_create(adev, &bp, bo);
+	r = amdgpu_bo_create_vm(adev, &bp, vmbo);
 	if (r)
 		return r;
 
+	bo = &(*vmbo)->bo;
 	if (vm->is_compute_context && (adev->flags & AMD_IS_APU))
 		return 0;
 
 	if (!bp.resv)
-		WARN_ON(dma_resv_lock((*bo)->tbo.base.resv,
+		WARN_ON(dma_resv_lock(bo->tbo.base.resv,
 				      NULL));
-	r = amdgpu_bo_create_shadow(adev, bp.size, *bo);
+	r = amdgpu_bo_create_shadow(adev, bp.size, bo);
 
 	if (!bp.resv)
-		dma_resv_unlock((*bo)->tbo.base.resv);
+		dma_resv_unlock(bo->tbo.base.resv);
 
 	if (r) {
-		amdgpu_bo_unref(bo);
+		amdgpu_bo_unref(&bo);
 		return r;
 	}
 
@@ -933,7 +935,8 @@ static int amdgpu_vm_alloc_pts(struct amdgpu_device *adev,
 			       bool immediate)
 {
 	struct amdgpu_vm_pt *entry = cursor->entry;
-	struct amdgpu_bo *pt;
+	struct amdgpu_bo *pt_bo;
+	struct amdgpu_bo_vm *pt;
 	int r;
 
 	if (cursor->level < AMDGPU_VM_PTB && !entry->entries) {
@@ -957,18 +960,19 @@ static int amdgpu_vm_alloc_pts(struct amdgpu_device *adev,
 	/* Keep a reference to the root directory to avoid
 	 * freeing them up in the wrong order.
 	 */
-	pt->parent = amdgpu_bo_ref(cursor->parent->base.bo);
-	amdgpu_vm_bo_base_init(&entry->base, vm, pt);
+	pt_bo = &pt->bo;
+	pt_bo->parent = amdgpu_bo_ref(cursor->parent->base.bo);
+	amdgpu_vm_bo_base_init(&entry->base, vm, pt_bo);
 
-	r = amdgpu_vm_clear_bo(adev, vm, pt, immediate);
+	r = amdgpu_vm_clear_bo(adev, vm, pt_bo, immediate);
 	if (r)
 		goto error_free_pt;
 
 	return 0;
 
 error_free_pt:
-	amdgpu_bo_unref(&pt->shadow);
-	amdgpu_bo_unref(&pt);
+	amdgpu_bo_unref(&pt_bo->shadow);
+	amdgpu_bo_unref(&pt_bo);
 	return r;
 }
 
@@ -2843,7 +2847,8 @@ long amdgpu_vm_wait_idle(struct amdgpu_vm *vm, long timeout)
  */
 int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm, u32 pasid)
 {
-	struct amdgpu_bo *root;
+	struct amdgpu_bo *root_bo;
+	struct amdgpu_bo_vm *root;
 	int r, i;
 
 	vm->va = RB_ROOT_CACHED;
@@ -2897,18 +2902,18 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm, u32 pasid)
 				false, &root);
 	if (r)
 		goto error_free_delayed;
-
-	r = amdgpu_bo_reserve(root, true);
+	root_bo = &root->bo;
+	r = amdgpu_bo_reserve(root_bo, true);
 	if (r)
 		goto error_free_root;
 
-	r = dma_resv_reserve_shared(root->tbo.base.resv, 1);
+	r = dma_resv_reserve_shared(root_bo->tbo.base.resv, 1);
 	if (r)
 		goto error_unreserve;
 
-	amdgpu_vm_bo_base_init(&vm->root.base, vm, root);
+	amdgpu_vm_bo_base_init(&vm->root.base, vm, root_bo);
 
-	r = amdgpu_vm_clear_bo(adev, vm, root, false);
+	r = amdgpu_vm_clear_bo(adev, vm, root_bo, false);
 	if (r)
 		goto error_unreserve;
 
-- 
2.31.1

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Re: [PATCH 3/7] drm/amdgpu: use amdgpu_bo_vm for vm code

[Christian König]

Am 26.05.21 um 12:10 schrieb Nirmoy Das:
> Use amdgpu_bo_vm subclass for creating BOs related to PD/PT.

I think it would be better if you just squash patch #3, #4 and #5 together.

Apart from that looks good to me, but still need to double check patch #7.

Christian.

>
> Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 43 ++++++++++++++------------
>   1 file changed, 24 insertions(+), 19 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> index f474f15ba344..2c97d67d9cfc 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> @@ -868,9 +868,10 @@ static int amdgpu_vm_clear_bo(struct amdgpu_device *adev,
>   static int amdgpu_vm_pt_create(struct amdgpu_device *adev,
>   			       struct amdgpu_vm *vm,
>   			       int level, bool immediate,
> -			       struct amdgpu_bo **bo)
> +			       struct amdgpu_bo_vm **vmbo)
>   {
>   	struct amdgpu_bo_param bp;
> +	struct amdgpu_bo *bo;
>   	int r;
>   
>   	memset(&bp, 0, sizeof(bp));
> @@ -881,7 +882,7 @@ static int amdgpu_vm_pt_create(struct amdgpu_device *adev,
>   	bp.domain = amdgpu_bo_get_preferred_pin_domain(adev, bp.domain);
>   	bp.flags = AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS |
>   		AMDGPU_GEM_CREATE_CPU_GTT_USWC;
> -	bp.bo_ptr_size = sizeof(struct amdgpu_bo);
> +	bp.bo_ptr_size = sizeof(struct amdgpu_bo_vm);
>   	if (vm->use_cpu_for_update)
>   		bp.flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
>   
> @@ -890,23 +891,24 @@ static int amdgpu_vm_pt_create(struct amdgpu_device *adev,
>   	if (vm->root.base.bo)
>   		bp.resv = vm->root.base.bo->tbo.base.resv;
>   
> -	r = amdgpu_bo_create(adev, &bp, bo);
> +	r = amdgpu_bo_create_vm(adev, &bp, vmbo);
>   	if (r)
>   		return r;
>   
> +	bo = &(*vmbo)->bo;
>   	if (vm->is_compute_context && (adev->flags & AMD_IS_APU))
>   		return 0;
>   
>   	if (!bp.resv)
> -		WARN_ON(dma_resv_lock((*bo)->tbo.base.resv,
> +		WARN_ON(dma_resv_lock(bo->tbo.base.resv,
>   				      NULL));
> -	r = amdgpu_bo_create_shadow(adev, bp.size, *bo);
> +	r = amdgpu_bo_create_shadow(adev, bp.size, bo);
>   
>   	if (!bp.resv)
> -		dma_resv_unlock((*bo)->tbo.base.resv);
> +		dma_resv_unlock(bo->tbo.base.resv);
>   
>   	if (r) {
> -		amdgpu_bo_unref(bo);
> +		amdgpu_bo_unref(&bo);
>   		return r;
>   	}
>   
> @@ -933,7 +935,8 @@ static int amdgpu_vm_alloc_pts(struct amdgpu_device *adev,
>   			       bool immediate)
>   {
>   	struct amdgpu_vm_pt *entry = cursor->entry;
> -	struct amdgpu_bo *pt;
> +	struct amdgpu_bo *pt_bo;
> +	struct amdgpu_bo_vm *pt;
>   	int r;
>   
>   	if (cursor->level < AMDGPU_VM_PTB && !entry->entries) {
> @@ -957,18 +960,19 @@ static int amdgpu_vm_alloc_pts(struct amdgpu_device *adev,
>   	/* Keep a reference to the root directory to avoid
>   	 * freeing them up in the wrong order.
>   	 */
> -	pt->parent = amdgpu_bo_ref(cursor->parent->base.bo);
> -	amdgpu_vm_bo_base_init(&entry->base, vm, pt);
> +	pt_bo = &pt->bo;
> +	pt_bo->parent = amdgpu_bo_ref(cursor->parent->base.bo);
> +	amdgpu_vm_bo_base_init(&entry->base, vm, pt_bo);
>   
> -	r = amdgpu_vm_clear_bo(adev, vm, pt, immediate);
> +	r = amdgpu_vm_clear_bo(adev, vm, pt_bo, immediate);
>   	if (r)
>   		goto error_free_pt;
>   
>   	return 0;
>   
>   error_free_pt:
> -	amdgpu_bo_unref(&pt->shadow);
> -	amdgpu_bo_unref(&pt);
> +	amdgpu_bo_unref(&pt_bo->shadow);
> +	amdgpu_bo_unref(&pt_bo);
>   	return r;
>   }
>   
> @@ -2843,7 +2847,8 @@ long amdgpu_vm_wait_idle(struct amdgpu_vm *vm, long timeout)
>    */
>   int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm, u32 pasid)
>   {
> -	struct amdgpu_bo *root;
> +	struct amdgpu_bo *root_bo;
> +	struct amdgpu_bo_vm *root;
>   	int r, i;
>   
>   	vm->va = RB_ROOT_CACHED;
> @@ -2897,18 +2902,18 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm, u32 pasid)
>   				false, &root);
>   	if (r)
>   		goto error_free_delayed;
> -
> -	r = amdgpu_bo_reserve(root, true);
> +	root_bo = &root->bo;
> +	r = amdgpu_bo_reserve(root_bo, true);
>   	if (r)
>   		goto error_free_root;
>   
> -	r = dma_resv_reserve_shared(root->tbo.base.resv, 1);
> +	r = dma_resv_reserve_shared(root_bo->tbo.base.resv, 1);
>   	if (r)
>   		goto error_unreserve;
>   
> -	amdgpu_vm_bo_base_init(&vm->root.base, vm, root);
> +	amdgpu_vm_bo_base_init(&vm->root.base, vm, root_bo);
>   
> -	r = amdgpu_vm_clear_bo(adev, vm, root, false);
> +	r = amdgpu_vm_clear_bo(adev, vm, root_bo, false);
>   	if (r)
>   		goto error_unreserve;
>   

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[PATCH 4/7] drm/amdgpu: create shadow bo directly

[Nirmoy Das]

Shadow BOs are only needed by VM code so create it
directly within the vm code.

Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 22 ++++++++++++++++++++--
 1 file changed, 20 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 2c97d67d9cfc..04cabcc3dc3d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -872,6 +872,8 @@ static int amdgpu_vm_pt_create(struct amdgpu_device *adev,
 {
 	struct amdgpu_bo_param bp;
 	struct amdgpu_bo *bo;
+	struct amdgpu_bo *shadow_bo;
+	struct dma_resv *resv;
 	int r;
 
 	memset(&bp, 0, sizeof(bp));
@@ -902,9 +904,19 @@ static int amdgpu_vm_pt_create(struct amdgpu_device *adev,
 	if (!bp.resv)
 		WARN_ON(dma_resv_lock(bo->tbo.base.resv,
 				      NULL));
-	r = amdgpu_bo_create_shadow(adev, bp.size, bo);
+	resv = bp.resv;
+	memset(&bp, 0, sizeof(bp));
+	bp.size = amdgpu_vm_bo_size(adev, level);
+	bp.domain = AMDGPU_GEM_DOMAIN_GTT;
+	bp.flags = AMDGPU_GEM_CREATE_CPU_GTT_USWC;
+	bp.type = ttm_bo_type_kernel;
+	bp.resv = bo->tbo.base.resv;
+	bp.bo_ptr_size = sizeof(struct amdgpu_bo);
 
-	if (!bp.resv)
+	r = amdgpu_bo_create(adev, &bp, &shadow_bo);
+
+
+	if (!resv)
 		dma_resv_unlock(bo->tbo.base.resv);
 
 	if (r) {
@@ -912,6 +924,12 @@ static int amdgpu_vm_pt_create(struct amdgpu_device *adev,
 		return r;
 	}
 
+	shadow_bo->parent = amdgpu_bo_ref(bo);
+	mutex_lock(&adev->shadow_list_lock);
+	list_add_tail(&shadow_bo->shadow_list, &adev->shadow_list);
+	mutex_unlock(&adev->shadow_list_lock);
+	bo->shadow = shadow_bo;
+
 	return 0;
 }
 
-- 
2.31.1

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[PATCH 5/7] drm/amdgpu: switch to amdgpu_bo_vm for shadow pointer

[Nirmoy Das]

The subclass, amdgpu_bo_vm is intended for PT/PD BOs which are shadowed,
so switch to shadow pointer of amdgpu_bo_vm.

Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c      | 27 ++++++++++++---------
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm_sdma.c | 16 ++++++------
 2 files changed, 24 insertions(+), 19 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 04cabcc3dc3d..ce17ffce9ade 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -658,9 +658,9 @@ void amdgpu_vm_move_to_lru_tail(struct amdgpu_device *adev,
 
 		ttm_bo_move_to_lru_tail(&bo->tbo, &bo->tbo.mem,
 					&vm->lru_bulk_move);
-		if (bo->shadow)
-			ttm_bo_move_to_lru_tail(&bo->shadow->tbo,
-						&bo->shadow->tbo.mem,
+		if (bo->tbo.type == ttm_bo_type_kernel)
+			ttm_bo_move_to_lru_tail(&to_amdgpu_bo_vm(bo)->shadow->tbo,
+						&to_amdgpu_bo_vm(bo)->shadow->tbo.mem,
 						&vm->lru_bulk_move);
 	}
 	spin_unlock(&adev->mman.bdev.lru_lock);
@@ -793,8 +793,9 @@ static int amdgpu_vm_clear_bo(struct amdgpu_device *adev,
 	if (r)
 		return r;
 
-	if (bo->shadow) {
-		r = ttm_bo_validate(&bo->shadow->tbo, &bo->shadow->placement,
+	if (bo->tbo.type == ttm_bo_type_kernel) {
+		r = ttm_bo_validate(&to_amdgpu_bo_vm(bo)->shadow->tbo,
+				    &to_amdgpu_bo_vm(bo)->shadow->placement,
 				    &ctx);
 		if (r)
 			return r;
@@ -928,7 +929,7 @@ static int amdgpu_vm_pt_create(struct amdgpu_device *adev,
 	mutex_lock(&adev->shadow_list_lock);
 	list_add_tail(&shadow_bo->shadow_list, &adev->shadow_list);
 	mutex_unlock(&adev->shadow_list_lock);
-	bo->shadow = shadow_bo;
+	(*vmbo)->shadow = shadow_bo;
 
 	return 0;
 }
@@ -989,7 +990,7 @@ static int amdgpu_vm_alloc_pts(struct amdgpu_device *adev,
 	return 0;
 
 error_free_pt:
-	amdgpu_bo_unref(&pt_bo->shadow);
+	amdgpu_bo_unref(&pt->shadow);
 	amdgpu_bo_unref(&pt_bo);
 	return r;
 }
@@ -1004,7 +1005,8 @@ static void amdgpu_vm_free_table(struct amdgpu_vm_pt *entry)
 	if (entry->base.bo) {
 		entry->base.bo->vm_bo = NULL;
 		list_del(&entry->base.vm_status);
-		amdgpu_bo_unref(&entry->base.bo->shadow);
+		if (entry->base.bo->tbo.type == ttm_bo_type_kernel)
+			amdgpu_bo_unref(&to_amdgpu_bo_vm(entry->base.bo)->shadow);
 		amdgpu_bo_unref(&entry->base.bo);
 	}
 	kvfree(entry->entries);
@@ -2696,7 +2698,8 @@ void amdgpu_vm_bo_invalidate(struct amdgpu_device *adev,
 	struct amdgpu_vm_bo_base *bo_base;
 
 	/* shadow bo doesn't have bo base, its validation needs its parent */
-	if (bo->parent && bo->parent->shadow == bo)
+	if (bo->parent && bo->tbo.type == ttm_bo_type_kernel &&
+	    to_amdgpu_bo_vm(bo->parent)->shadow == bo)
 		bo = bo->parent;
 
 	for (bo_base = bo->vm_bo; bo_base; bo_base = bo_base->next) {
@@ -2958,8 +2961,8 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm, u32 pasid)
 	amdgpu_bo_unreserve(vm->root.base.bo);
 
 error_free_root:
-	amdgpu_bo_unref(&vm->root.base.bo->shadow);
-	amdgpu_bo_unref(&vm->root.base.bo);
+	amdgpu_bo_unref(&root->shadow);
+	amdgpu_bo_unref(&root_bo);
 	vm->root.base.bo = NULL;
 
 error_free_delayed:
@@ -3101,7 +3104,7 @@ int amdgpu_vm_make_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm,
 	}
 
 	/* Free the shadow bo for compute VM */
-	amdgpu_bo_unref(&vm->root.base.bo->shadow);
+	amdgpu_bo_unref(&to_amdgpu_bo_vm(vm->root.base.bo)->shadow);
 
 	if (pasid)
 		vm->pasid = pasid;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_sdma.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_sdma.c
index a83a646759c5..3d9cff0c9dda 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_sdma.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_sdma.c
@@ -41,8 +41,8 @@ static int amdgpu_vm_sdma_map_table(struct amdgpu_bo *table)
 	if (r)
 		return r;
 
-	if (table->shadow)
-		r = amdgpu_ttm_alloc_gart(&table->shadow->tbo);
+	if (table->tbo.type == ttm_bo_type_kernel)
+		r = amdgpu_ttm_alloc_gart(&to_amdgpu_bo_vm(table)->shadow->tbo);
 
 	return r;
 }
@@ -238,8 +238,9 @@ static int amdgpu_vm_sdma_update(struct amdgpu_vm_update_params *p,
 
 		if (!p->pages_addr) {
 			/* set page commands needed */
-			if (bo->shadow)
-				amdgpu_vm_sdma_set_ptes(p, bo->shadow, pe, addr,
+			if (bo->tbo.type == ttm_bo_type_kernel)
+				amdgpu_vm_sdma_set_ptes(p, to_amdgpu_bo_vm(bo)->shadow,
+							pe, addr,
 							count, incr, flags);
 			amdgpu_vm_sdma_set_ptes(p, bo, pe, addr, count,
 						incr, flags);
@@ -248,7 +249,7 @@ static int amdgpu_vm_sdma_update(struct amdgpu_vm_update_params *p,
 
 		/* copy commands needed */
 		ndw -= p->adev->vm_manager.vm_pte_funcs->copy_pte_num_dw *
-			(bo->shadow ? 2 : 1);
+			((bo->tbo.type == ttm_bo_type_kernel) ? 2 : 1);
 
 		/* for padding */
 		ndw -= 7;
@@ -263,8 +264,9 @@ static int amdgpu_vm_sdma_update(struct amdgpu_vm_update_params *p,
 			pte[i] |= flags;
 		}
 
-		if (bo->shadow)
-			amdgpu_vm_sdma_copy_ptes(p, bo->shadow, pe, nptes);
+		if (bo->tbo.type == ttm_bo_type_kernel)
+			amdgpu_vm_sdma_copy_ptes(p, to_amdgpu_bo_vm(bo)->shadow,
+						 pe, nptes);
 		amdgpu_vm_sdma_copy_ptes(p, bo, pe, nptes);
 
 		pe += nptes * 8;
-- 
2.31.1

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[PATCH 6/7] drm/amdgpu: remove unused code

[Nirmoy Das]

Remove unused code related to shadow BO.

Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 29 ----------------------
 drivers/gpu/drm/amd/amdgpu/amdgpu_object.h |  3 ---
 2 files changed, 32 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 6870cc297ae6..7930b7d9a3b1 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -638,35 +638,6 @@ int amdgpu_bo_create(struct amdgpu_device *adev,
 	return r;
 }
 
-int amdgpu_bo_create_shadow(struct amdgpu_device *adev,
-			    unsigned long size,
-			    struct amdgpu_bo *bo)
-{
-	struct amdgpu_bo_param bp;
-	int r;
-
-	if (bo->shadow)
-		return 0;
-
-	memset(&bp, 0, sizeof(bp));
-	bp.size = size;
-	bp.domain = AMDGPU_GEM_DOMAIN_GTT;
-	bp.flags = AMDGPU_GEM_CREATE_CPU_GTT_USWC;
-	bp.type = ttm_bo_type_kernel;
-	bp.resv = bo->tbo.base.resv;
-	bp.bo_ptr_size = sizeof(struct amdgpu_bo);
-
-	r = amdgpu_bo_create(adev, &bp, &bo->shadow);
-	if (!r) {
-		bo->shadow->parent = amdgpu_bo_ref(bo);
-		mutex_lock(&adev->shadow_list_lock);
-		list_add_tail(&bo->shadow->shadow_list, &adev->shadow_list);
-		mutex_unlock(&adev->shadow_list_lock);
-	}
-
-	return r;
-}
-
 /**
  * amdgpu_bo_create_user - create an &amdgpu_bo_user buffer object
  * @adev: amdgpu device object
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
index a7fbf5f7051e..b8555c527613 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
@@ -284,9 +284,6 @@ int amdgpu_bo_create_vm(struct amdgpu_device *adev,
 			struct amdgpu_bo_vm **ubo_ptr);
 void amdgpu_bo_free_kernel(struct amdgpu_bo **bo, u64 *gpu_addr,
 			   void **cpu_addr);
-int amdgpu_bo_create_shadow(struct amdgpu_device *adev,
-			    unsigned long size,
-			    struct amdgpu_bo *bo);
 int amdgpu_bo_kmap(struct amdgpu_bo *bo, void **ptr);
 void *amdgpu_bo_kptr(struct amdgpu_bo *bo);
 void amdgpu_bo_kunmap(struct amdgpu_bo *bo);
-- 
2.31.1

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Re: [PATCH 6/7] drm/amdgpu: remove unused code

[Das, Nirmoy]

[-- Attachment #1.1: Type: text/plain, Size: 2972 bytes --]

[AMD Official Use Only]

I just realized that I didn't remove the shadow pointer from the amdgpu_bo. I will update that in the next version.

Regards,
Nirmoy
________________________________
From: Das, Nirmoy <Nirmoy.Das@amd.com>
Sent: Wednesday, May 26, 2021 12:10 PM
To: amd-gfx@lists.freedesktop.org <amd-gfx@lists.freedesktop.org>
Cc: Koenig, Christian <Christian.Koenig@amd.com>; Deucher, Alexander <Alexander.Deucher@amd.com>; Das, Nirmoy <Nirmoy.Das@amd.com>
Subject: [PATCH 6/7] drm/amdgpu: remove unused code

Remove unused code related to shadow BO.

Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 29 ----------------------
 drivers/gpu/drm/amd/amdgpu/amdgpu_object.h |  3 ---
 2 files changed, 32 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 6870cc297ae6..7930b7d9a3b1 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -638,35 +638,6 @@ int amdgpu_bo_create(struct amdgpu_device *adev,
         return r;
 }

-int amdgpu_bo_create_shadow(struct amdgpu_device *adev,
-                           unsigned long size,
-                           struct amdgpu_bo *bo)
-{
-       struct amdgpu_bo_param bp;
-       int r;
-
-       if (bo->shadow)
-               return 0;
-
-       memset(&bp, 0, sizeof(bp));
-       bp.size = size;
-       bp.domain = AMDGPU_GEM_DOMAIN_GTT;
-       bp.flags = AMDGPU_GEM_CREATE_CPU_GTT_USWC;
-       bp.type = ttm_bo_type_kernel;
-       bp.resv = bo->tbo.base.resv;
-       bp.bo_ptr_size = sizeof(struct amdgpu_bo);
-
-       r = amdgpu_bo_create(adev, &bp, &bo->shadow);
-       if (!r) {
-               bo->shadow->parent = amdgpu_bo_ref(bo);
-               mutex_lock(&adev->shadow_list_lock);
-               list_add_tail(&bo->shadow->shadow_list, &adev->shadow_list);
-               mutex_unlock(&adev->shadow_list_lock);
-       }
-
-       return r;
-}
-
 /**
  * amdgpu_bo_create_user - create an &amdgpu_bo_user buffer object
  * @adev: amdgpu device object
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
index a7fbf5f7051e..b8555c527613 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
@@ -284,9 +284,6 @@ int amdgpu_bo_create_vm(struct amdgpu_device *adev,
                         struct amdgpu_bo_vm **ubo_ptr);
 void amdgpu_bo_free_kernel(struct amdgpu_bo **bo, u64 *gpu_addr,
                            void **cpu_addr);
-int amdgpu_bo_create_shadow(struct amdgpu_device *adev,
-                           unsigned long size,
-                           struct amdgpu_bo *bo);
 int amdgpu_bo_kmap(struct amdgpu_bo *bo, void **ptr);
 void *amdgpu_bo_kptr(struct amdgpu_bo *bo);
 void amdgpu_bo_kunmap(struct amdgpu_bo *bo);
--
2.31.1


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[-- Attachment #2: Type: text/plain, Size: 154 bytes --]

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[PATCH v2 7/7] drm/amdgpu: do not allocate entries separately

[Nirmoy Das]

Allocate PD/PT entries while allocating VM BOs and use that
instead of allocating those entries separately.

v2: create a new var for num entries.

Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 34 +++++++++++++++-----------
 1 file changed, 20 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index ce17ffce9ade..dc56b09e493a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -876,6 +876,7 @@ static int amdgpu_vm_pt_create(struct amdgpu_device *adev,
 	struct amdgpu_bo *shadow_bo;
 	struct dma_resv *resv;
 	int r;
+	unsigned int num_entries;

 	memset(&bp, 0, sizeof(bp));

@@ -885,7 +886,14 @@ static int amdgpu_vm_pt_create(struct amdgpu_device *adev,
 	bp.domain = amdgpu_bo_get_preferred_pin_domain(adev, bp.domain);
 	bp.flags = AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS |
 		AMDGPU_GEM_CREATE_CPU_GTT_USWC;
-	bp.bo_ptr_size = sizeof(struct amdgpu_bo_vm);
+
+	if (level < AMDGPU_VM_PTB)
+		num_entries = amdgpu_vm_num_entries(adev, level);
+	else
+		num_entries = 0;
+
+	bp.bo_ptr_size = struct_size((*vmbo), entries, num_entries);
+
 	if (vm->use_cpu_for_update)
 		bp.flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;

@@ -958,19 +966,14 @@ static int amdgpu_vm_alloc_pts(struct amdgpu_device *adev,
 	struct amdgpu_bo_vm *pt;
 	int r;

-	if (cursor->level < AMDGPU_VM_PTB && !entry->entries) {
-		unsigned num_entries;
-
-		num_entries = amdgpu_vm_num_entries(adev, cursor->level);
-		entry->entries = kvmalloc_array(num_entries,
-						sizeof(*entry->entries),
-						GFP_KERNEL | __GFP_ZERO);
-		if (!entry->entries)
-			return -ENOMEM;
-	}
-
-	if (entry->base.bo)
+	if (entry->base.bo) {
+		if (cursor->level < AMDGPU_VM_PTB)
+			entry->entries =
+				to_amdgpu_bo_vm(entry->base.bo)->entries;
+		else
+			entry->entries = NULL;
 		return 0;
+	}

 	r = amdgpu_vm_pt_create(adev, vm, cursor->level, immediate, &pt);
 	if (r)
@@ -982,6 +985,10 @@ static int amdgpu_vm_alloc_pts(struct amdgpu_device *adev,
 	pt_bo = &pt->bo;
 	pt_bo->parent = amdgpu_bo_ref(cursor->parent->base.bo);
 	amdgpu_vm_bo_base_init(&entry->base, vm, pt_bo);
+	if (cursor->level < AMDGPU_VM_PTB)
+		entry->entries = pt->entries;
+	else
+		entry->entries = NULL;

 	r = amdgpu_vm_clear_bo(adev, vm, pt_bo, immediate);
 	if (r)
@@ -1009,7 +1016,6 @@ static void amdgpu_vm_free_table(struct amdgpu_vm_pt *entry)
 			amdgpu_bo_unref(&to_amdgpu_bo_vm(entry->base.bo)->shadow);
 		amdgpu_bo_unref(&entry->base.bo);
 	}
-	kvfree(entry->entries);
 	entry->entries = NULL;
 }

--
2.31.1

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Re: [PATCH 1/7] drm/amdgpu: add amdgpu_bo_vm bo type

[Christian König]

Am 26.05.21 um 12:10 schrieb Nirmoy Das:
> Add new BO subclass that will be used by amdgpu vm code.
>
> Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>

Reviewed-by: Christian König <christian.koenig@amd.com>

> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 32 ++++++++++++++++++++++
>   drivers/gpu/drm/amd/amdgpu/amdgpu_object.h | 10 +++++++
>   2 files changed, 42 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> index 3f85ba8222ef..6870cc297ae6 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> @@ -694,6 +694,38 @@ int amdgpu_bo_create_user(struct amdgpu_device *adev,
>   	*ubo_ptr = to_amdgpu_bo_user(bo_ptr);
>   	return r;
>   }
> +
> +/**
> + * amdgpu_bo_create_vm - create an &amdgpu_bo_vm buffer object
> + * @adev: amdgpu device object
> + * @bp: parameters to be used for the buffer object
> + * @vmbo_ptr: pointer to the buffer object pointer
> + *
> + * Create a BO to be for GPUVM.
> + *
> + * Returns:
> + * 0 for success or a negative error code on failure.
> + */
> +
> +int amdgpu_bo_create_vm(struct amdgpu_device *adev,
> +			struct amdgpu_bo_param *bp,
> +			struct amdgpu_bo_vm **vmbo_ptr)
> +{
> +	struct amdgpu_bo *bo_ptr;
> +	int r;
> +
> +	/* bo_ptr_size will be determined by the caller and it depends on
> +	 * num of amdgpu_vm_pt entries.
> +	 */
> +	BUG_ON(bp->bo_ptr_size < sizeof(struct amdgpu_bo_vm));
> +	r = amdgpu_bo_create(adev, bp, &bo_ptr);
> +	if (r)
> +		return r;
> +
> +	*vmbo_ptr = to_amdgpu_bo_vm(bo_ptr);
> +	return r;
> +}
> +
>   /**
>    * amdgpu_bo_validate - validate an &amdgpu_bo buffer object
>    * @bo: pointer to the buffer object
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
> index 11480c5a2716..a7fbf5f7051e 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
> @@ -44,6 +44,7 @@
>   #define AMDGPU_AMDKFD_CREATE_SVM_BO	(1ULL << 62)
>   
>   #define to_amdgpu_bo_user(abo) container_of((abo), struct amdgpu_bo_user, bo)
> +#define to_amdgpu_bo_vm(abo) container_of((abo), struct amdgpu_bo_vm, bo)
>   
>   struct amdgpu_bo_param {
>   	unsigned long			size;
> @@ -125,6 +126,12 @@ struct amdgpu_bo_user {
>   
>   };
>   
> +struct amdgpu_bo_vm {
> +	struct amdgpu_bo		bo;
> +	struct amdgpu_bo		*shadow;
> +	struct amdgpu_vm_pt             entries[];
> +};
> +
>   static inline struct amdgpu_bo *ttm_to_amdgpu_bo(struct ttm_buffer_object *tbo)
>   {
>   	return container_of(tbo, struct amdgpu_bo, tbo);
> @@ -272,6 +279,9 @@ int amdgpu_bo_create_kernel_at(struct amdgpu_device *adev,
>   int amdgpu_bo_create_user(struct amdgpu_device *adev,
>   			  struct amdgpu_bo_param *bp,
>   			  struct amdgpu_bo_user **ubo_ptr);
> +int amdgpu_bo_create_vm(struct amdgpu_device *adev,
> +			struct amdgpu_bo_param *bp,
> +			struct amdgpu_bo_vm **ubo_ptr);
>   void amdgpu_bo_free_kernel(struct amdgpu_bo **bo, u64 *gpu_addr,
>   			   void **cpu_addr);
>   int amdgpu_bo_create_shadow(struct amdgpu_device *adev,

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[PATCH 1/7] drm/amdgpu: add amdgpu_bo_vm bo type

[Nirmoy Das]

Add new BO subcalss that will be used by amdgpu vm code.

Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 32 ++++++++++++++++++++++
 drivers/gpu/drm/amd/amdgpu/amdgpu_object.h | 10 +++++++
 2 files changed, 42 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 745fcf3ea450..61b1edcb490a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -692,6 +692,38 @@ int amdgpu_bo_create_user(struct amdgpu_device *adev,
 	*ubo_ptr = to_amdgpu_bo_user(bo_ptr);
 	return r;
 }
+
+/**
+ * amdgpu_bo_create_vm - create an &amdgpu_bo_vm buffer object
+ * @adev: amdgpu device object
+ * @bp: parameters to be used for the buffer object
+ * @vmbo_ptr: pointer to the buffer object pointer
+ *
+ * Create a BO to be for GPUVM.
+ *
+ * Returns:
+ * 0 for success or a negative error code on failure.
+ */
+
+int amdgpu_bo_create_vm(struct amdgpu_device *adev,
+			struct amdgpu_bo_param *bp,
+			struct amdgpu_bo_vm **vmbo_ptr)
+{
+	struct amdgpu_bo *bo_ptr;
+	int r;
+
+	/* bo_ptr_size will be determined by the caller and it depends on
+	 * num of amdgpu_vm_pt entries.
+	 */
+	BUG_ON(bp->bo_ptr_size < sizeof(struct amdgpu_bo_vm));
+	r = amdgpu_bo_create(adev, bp, &bo_ptr);
+	if (r)
+		return r;
+
+	*vmbo_ptr = to_amdgpu_bo_vm(bo_ptr);
+	return r;
+}
+
 /**
  * amdgpu_bo_validate - validate an &amdgpu_bo buffer object
  * @bo: pointer to the buffer object
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
index 11480c5a2716..a7fbf5f7051e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
@@ -44,6 +44,7 @@
 #define AMDGPU_AMDKFD_CREATE_SVM_BO	(1ULL << 62)
 
 #define to_amdgpu_bo_user(abo) container_of((abo), struct amdgpu_bo_user, bo)
+#define to_amdgpu_bo_vm(abo) container_of((abo), struct amdgpu_bo_vm, bo)
 
 struct amdgpu_bo_param {
 	unsigned long			size;
@@ -125,6 +126,12 @@ struct amdgpu_bo_user {
 
 };
 
+struct amdgpu_bo_vm {
+	struct amdgpu_bo		bo;
+	struct amdgpu_bo		*shadow;
+	struct amdgpu_vm_pt             entries[];
+};
+
 static inline struct amdgpu_bo *ttm_to_amdgpu_bo(struct ttm_buffer_object *tbo)
 {
 	return container_of(tbo, struct amdgpu_bo, tbo);
@@ -272,6 +279,9 @@ int amdgpu_bo_create_kernel_at(struct amdgpu_device *adev,
 int amdgpu_bo_create_user(struct amdgpu_device *adev,
 			  struct amdgpu_bo_param *bp,
 			  struct amdgpu_bo_user **ubo_ptr);
+int amdgpu_bo_create_vm(struct amdgpu_device *adev,
+			struct amdgpu_bo_param *bp,
+			struct amdgpu_bo_vm **ubo_ptr);
 void amdgpu_bo_free_kernel(struct amdgpu_bo **bo, u64 *gpu_addr,
 			   void **cpu_addr);
 int amdgpu_bo_create_shadow(struct amdgpu_device *adev,
-- 
2.31.1

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Re: [PATCH 1/7] drm/amdgpu: add amdgpu_bo_vm bo type

[Alex Deucher]

On Fri, May 21, 2021 at 8:46 AM Nirmoy Das <nirmoy.das@amd.com> wrote:
>
> Add new BO subcalss that will be used by amdgpu vm code.

s/subcalss/subclass/

Alex

>
> Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 32 ++++++++++++++++++++++
>  drivers/gpu/drm/amd/amdgpu/amdgpu_object.h | 10 +++++++
>  2 files changed, 42 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> index 745fcf3ea450..61b1edcb490a 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> @@ -692,6 +692,38 @@ int amdgpu_bo_create_user(struct amdgpu_device *adev,
>         *ubo_ptr = to_amdgpu_bo_user(bo_ptr);
>         return r;
>  }
> +
> +/**
> + * amdgpu_bo_create_vm - create an &amdgpu_bo_vm buffer object
> + * @adev: amdgpu device object
> + * @bp: parameters to be used for the buffer object
> + * @vmbo_ptr: pointer to the buffer object pointer
> + *
> + * Create a BO to be for GPUVM.
> + *
> + * Returns:
> + * 0 for success or a negative error code on failure.
> + */
> +
> +int amdgpu_bo_create_vm(struct amdgpu_device *adev,
> +                       struct amdgpu_bo_param *bp,
> +                       struct amdgpu_bo_vm **vmbo_ptr)
> +{
> +       struct amdgpu_bo *bo_ptr;
> +       int r;
> +
> +       /* bo_ptr_size will be determined by the caller and it depends on
> +        * num of amdgpu_vm_pt entries.
> +        */
> +       BUG_ON(bp->bo_ptr_size < sizeof(struct amdgpu_bo_vm));
> +       r = amdgpu_bo_create(adev, bp, &bo_ptr);
> +       if (r)
> +               return r;
> +
> +       *vmbo_ptr = to_amdgpu_bo_vm(bo_ptr);
> +       return r;
> +}
> +
>  /**
>   * amdgpu_bo_validate - validate an &amdgpu_bo buffer object
>   * @bo: pointer to the buffer object
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
> index 11480c5a2716..a7fbf5f7051e 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
> @@ -44,6 +44,7 @@
>  #define AMDGPU_AMDKFD_CREATE_SVM_BO    (1ULL << 62)
>
>  #define to_amdgpu_bo_user(abo) container_of((abo), struct amdgpu_bo_user, bo)
> +#define to_amdgpu_bo_vm(abo) container_of((abo), struct amdgpu_bo_vm, bo)
>
>  struct amdgpu_bo_param {
>         unsigned long                   size;
> @@ -125,6 +126,12 @@ struct amdgpu_bo_user {
>
>  };
>
> +struct amdgpu_bo_vm {
> +       struct amdgpu_bo                bo;
> +       struct amdgpu_bo                *shadow;
> +       struct amdgpu_vm_pt             entries[];
> +};
> +
>  static inline struct amdgpu_bo *ttm_to_amdgpu_bo(struct ttm_buffer_object *tbo)
>  {
>         return container_of(tbo, struct amdgpu_bo, tbo);
> @@ -272,6 +279,9 @@ int amdgpu_bo_create_kernel_at(struct amdgpu_device *adev,
>  int amdgpu_bo_create_user(struct amdgpu_device *adev,
>                           struct amdgpu_bo_param *bp,
>                           struct amdgpu_bo_user **ubo_ptr);
> +int amdgpu_bo_create_vm(struct amdgpu_device *adev,
> +                       struct amdgpu_bo_param *bp,
> +                       struct amdgpu_bo_vm **ubo_ptr);
>  void amdgpu_bo_free_kernel(struct amdgpu_bo **bo, u64 *gpu_addr,
>                            void **cpu_addr);
>  int amdgpu_bo_create_shadow(struct amdgpu_device *adev,
> --
> 2.31.1
>
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> amd-gfx@lists.freedesktop.org
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Re: [PATCH 1/7] drm/amdgpu: add amdgpu_bo_vm bo type

[Nirmoy]

On 5/21/21 4:54 PM, Alex Deucher wrote:
> On Fri, May 21, 2021 at 8:46 AM Nirmoy Das <nirmoy.das@amd.com> wrote:
>> Add new BO subcalss that will be used by amdgpu vm code.
> s/subcalss/subclass/


Thanks, Alex!

>
> Alex
>
>> Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
>> ---
>>   drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 32 ++++++++++++++++++++++
>>   drivers/gpu/drm/amd/amdgpu/amdgpu_object.h | 10 +++++++
>>   2 files changed, 42 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
>> index 745fcf3ea450..61b1edcb490a 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
>> @@ -692,6 +692,38 @@ int amdgpu_bo_create_user(struct amdgpu_device *adev,
>>          *ubo_ptr = to_amdgpu_bo_user(bo_ptr);
>>          return r;
>>   }
>> +
>> +/**
>> + * amdgpu_bo_create_vm - create an &amdgpu_bo_vm buffer object
>> + * @adev: amdgpu device object
>> + * @bp: parameters to be used for the buffer object
>> + * @vmbo_ptr: pointer to the buffer object pointer
>> + *
>> + * Create a BO to be for GPUVM.
>> + *
>> + * Returns:
>> + * 0 for success or a negative error code on failure.
>> + */
>> +
>> +int amdgpu_bo_create_vm(struct amdgpu_device *adev,
>> +                       struct amdgpu_bo_param *bp,
>> +                       struct amdgpu_bo_vm **vmbo_ptr)
>> +{
>> +       struct amdgpu_bo *bo_ptr;
>> +       int r;
>> +
>> +       /* bo_ptr_size will be determined by the caller and it depends on
>> +        * num of amdgpu_vm_pt entries.
>> +        */
>> +       BUG_ON(bp->bo_ptr_size < sizeof(struct amdgpu_bo_vm));
>> +       r = amdgpu_bo_create(adev, bp, &bo_ptr);
>> +       if (r)
>> +               return r;
>> +
>> +       *vmbo_ptr = to_amdgpu_bo_vm(bo_ptr);
>> +       return r;
>> +}
>> +
>>   /**
>>    * amdgpu_bo_validate - validate an &amdgpu_bo buffer object
>>    * @bo: pointer to the buffer object
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
>> index 11480c5a2716..a7fbf5f7051e 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
>> @@ -44,6 +44,7 @@
>>   #define AMDGPU_AMDKFD_CREATE_SVM_BO    (1ULL << 62)
>>
>>   #define to_amdgpu_bo_user(abo) container_of((abo), struct amdgpu_bo_user, bo)
>> +#define to_amdgpu_bo_vm(abo) container_of((abo), struct amdgpu_bo_vm, bo)
>>
>>   struct amdgpu_bo_param {
>>          unsigned long                   size;
>> @@ -125,6 +126,12 @@ struct amdgpu_bo_user {
>>
>>   };
>>
>> +struct amdgpu_bo_vm {
>> +       struct amdgpu_bo                bo;
>> +       struct amdgpu_bo                *shadow;
>> +       struct amdgpu_vm_pt             entries[];
>> +};
>> +
>>   static inline struct amdgpu_bo *ttm_to_amdgpu_bo(struct ttm_buffer_object *tbo)
>>   {
>>          return container_of(tbo, struct amdgpu_bo, tbo);
>> @@ -272,6 +279,9 @@ int amdgpu_bo_create_kernel_at(struct amdgpu_device *adev,
>>   int amdgpu_bo_create_user(struct amdgpu_device *adev,
>>                            struct amdgpu_bo_param *bp,
>>                            struct amdgpu_bo_user **ubo_ptr);
>> +int amdgpu_bo_create_vm(struct amdgpu_device *adev,
>> +                       struct amdgpu_bo_param *bp,
>> +                       struct amdgpu_bo_vm **ubo_ptr);
>>   void amdgpu_bo_free_kernel(struct amdgpu_bo **bo, u64 *gpu_addr,
>>                             void **cpu_addr);
>>   int amdgpu_bo_create_shadow(struct amdgpu_device *adev,
>> --
>> 2.31.1
>>
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