From c4a5d5d20c7d916623b675e07b40499e9819ffd8 Mon Sep 17 00:00:00 2001
From: jsg <jsg@openbsd.org>
Date: Fri, 13 Jan 2023 01:40:51 +0000
Subject: [PATCH] drm/amdkfd: Fix double release compute pasid

From Philip Yang
a02c07b619899179384fde06f951530438a3512d in linux-6.1.y/6.1.5
1a799c4c190ea9f0e81028e3eb3037ed0ab17ff5 in mainline linux
---
 sys/dev/pci/drm/amd/amdgpu/amdgpu_amdkfd.h    |  4 +-
 .../pci/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c  | 39 +++++++++++++------
 sys/dev/pci/drm/amd/amdkfd/kfd_process.c      | 12 ++++--
 3 files changed, 40 insertions(+), 15 deletions(-)

diff --git a/sys/dev/pci/drm/amd/amdgpu/amdgpu_amdkfd.h b/sys/dev/pci/drm/amd/amdgpu/amdgpu_amdkfd.h
index e6ab19bfc43..5e0a0710ca1 100644
--- a/sys/dev/pci/drm/amd/amdgpu/amdgpu_amdkfd.h
+++ b/sys/dev/pci/drm/amd/amdgpu/amdgpu_amdkfd.h
@@ -265,8 +265,10 @@ int amdgpu_amdkfd_get_pcie_bandwidth_mbytes(struct amdgpu_device *adev, bool is_
 	(&((struct amdgpu_fpriv *)					\
 		((struct drm_file *)(drm_priv))->driver_priv)->vm)
 
+int amdgpu_amdkfd_gpuvm_set_vm_pasid(struct amdgpu_device *adev,
+				     struct file *filp, u32 pasid);
 int amdgpu_amdkfd_gpuvm_acquire_process_vm(struct amdgpu_device *adev,
-					struct file *filp, u32 pasid,
+					struct file *filp,
 					void **process_info,
 					struct dma_fence **ef);
 void amdgpu_amdkfd_gpuvm_release_process_vm(struct amdgpu_device *adev,
diff --git a/sys/dev/pci/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/sys/dev/pci/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
index 279db18c487..417c08a1c9f 100644
--- a/sys/dev/pci/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
+++ b/sys/dev/pci/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
@@ -1473,10 +1473,9 @@ static void amdgpu_amdkfd_gpuvm_unpin_bo(struct amdgpu_bo *bo)
 	amdgpu_bo_unreserve(bo);
 }
 
-int amdgpu_amdkfd_gpuvm_acquire_process_vm(struct amdgpu_device *adev,
-					   struct file *filp, u32 pasid,
-					   void **process_info,
-					   struct dma_fence **ef)
+int amdgpu_amdkfd_gpuvm_set_vm_pasid(struct amdgpu_device *adev,
+				     struct file *filp, u32 pasid)
+
 {
 	struct amdgpu_fpriv *drv_priv;
 	struct amdgpu_vm *avm;
@@ -1487,10 +1486,6 @@ int amdgpu_amdkfd_gpuvm_acquire_process_vm(struct amdgpu_device *adev,
 		return ret;
 	avm = &drv_priv->vm;
 
-	/* Already a compute VM? */
-	if (avm->process_info)
-		return -EINVAL;
-
 	/* Free the original amdgpu allocated pasid,
 	 * will be replaced with kfd allocated pasid.
 	 */
@@ -1499,14 +1494,36 @@ int amdgpu_amdkfd_gpuvm_acquire_process_vm(struct amdgpu_device *adev,
 		amdgpu_vm_set_pasid(adev, avm, 0);
 	}
 
-	/* Convert VM into a compute VM */
-	ret = amdgpu_vm_make_compute(adev, avm);
+	ret = amdgpu_vm_set_pasid(adev, avm, pasid);
 	if (ret)
 		return ret;
 
-	ret = amdgpu_vm_set_pasid(adev, avm, pasid);
+	return 0;
+}
+
+int amdgpu_amdkfd_gpuvm_acquire_process_vm(struct amdgpu_device *adev,
+					   struct file *filp,
+					   void **process_info,
+					   struct dma_fence **ef)
+{
+	struct amdgpu_fpriv *drv_priv;
+	struct amdgpu_vm *avm;
+	int ret;
+
+	ret = amdgpu_file_to_fpriv(filp, &drv_priv);
 	if (ret)
 		return ret;
+	avm = &drv_priv->vm;
+
+	/* Already a compute VM? */
+	if (avm->process_info)
+		return -EINVAL;
+
+	/* Convert VM into a compute VM */
+	ret = amdgpu_vm_make_compute(adev, avm);
+	if (ret)
+		return ret;
+
 	/* Initialize KFD part of the VM and process info */
 	ret = init_kfd_vm(avm, process_info, ef);
 	if (ret)
diff --git a/sys/dev/pci/drm/amd/amdkfd/kfd_process.c b/sys/dev/pci/drm/amd/amdkfd/kfd_process.c
index 9821fa9268d..dd351105c1b 100644
--- a/sys/dev/pci/drm/amd/amdkfd/kfd_process.c
+++ b/sys/dev/pci/drm/amd/amdkfd/kfd_process.c
@@ -1576,9 +1576,9 @@ int kfd_process_device_init_vm(struct kfd_process_device *pdd,
 	p = pdd->process;
 	dev = pdd->dev;
 
-	ret = amdgpu_amdkfd_gpuvm_acquire_process_vm(
-		dev->adev, drm_file, p->pasid,
-		&p->kgd_process_info, &p->ef);
+	ret = amdgpu_amdkfd_gpuvm_acquire_process_vm(dev->adev, drm_file,
+						     &p->kgd_process_info,
+						     &p->ef);
 	if (ret) {
 		pr_err("Failed to create process VM object\n");
 		return ret;
@@ -1593,10 +1593,16 @@ int kfd_process_device_init_vm(struct kfd_process_device *pdd,
 	if (ret)
 		goto err_init_cwsr;
 
+	ret = amdgpu_amdkfd_gpuvm_set_vm_pasid(dev->adev, drm_file, p->pasid);
+	if (ret)
+		goto err_set_pasid;
+
 	pdd->drm_file = drm_file;
 
 	return 0;
 
+err_set_pasid:
+	kfd_process_device_destroy_cwsr_dgpu(pdd);
 err_init_cwsr:
 	kfd_process_device_destroy_ib_mem(pdd);
 err_reserve_ib_mem:
-- 
2.20.1