linux-kernel - [PATCH 5.4 34/52] drm/amdkfd: Use drm_priv to pass VM from KFD to amdgpu

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Date:   Tue, 10 May 2022 15:08:03 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Felix Kuehling <Felix.Kuehling@....com>,
        Philip Yang <philip.yang@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Lee Jones <lee.jones@...aro.org>
Subject: [PATCH 5.4 34/52] drm/amdkfd: Use drm_priv to pass VM from KFD to amdgpu

From: Felix Kuehling <Felix.Kuehling@....com>

commit b40a6ab2cf9213923bf8e821ce7fa7f6a0a26990 upstream.

amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu needs the drm_priv to allow mmap
to access the BO through the corresponding file descriptor. The VM can
also be extracted from drm_priv, so drm_priv can replace the vm parameter
in the kfd2kgd interface.

Signed-off-by: Felix Kuehling <Felix.Kuehling@....com>
Reviewed-by: Philip Yang <philip.yang@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
[This is a partial cherry-pick of the upstream commit.]
Signed-off-by: Lee Jones <lee.jones@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c |   10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
@@ -951,11 +951,15 @@ int amdgpu_amdkfd_gpuvm_acquire_process_
 					   struct dma_fence **ef)
 {
 	struct amdgpu_device *adev = get_amdgpu_device(kgd);
-	struct drm_file *drm_priv = filp->private_data;
-	struct amdgpu_fpriv *drv_priv = drm_priv->driver_priv;
-	struct amdgpu_vm *avm = &drv_priv->vm;
+	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;