drm/amdgpu/virt: add two functions for MM table

Add two functions to allocate & free MM table memory.

Signed-off-by: Xiangliang Yu <Xiangliang.Yu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 46 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
index ba8b8ae6234f..6bf5cea294f2 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
@@ -225,3 +225,49 @@ int amdgpu_virt_reset_gpu(struct amdgpu_device *adev)
 
         return 0;
 }
+
+/**
+ * amdgpu_virt_alloc_mm_table() - alloc memory for mm table
+ * @amdgpu:     amdgpu device.
+ * MM table is used by UVD and VCE for its initialization
+ * Return: Zero if allocate success.
+ */
+int amdgpu_virt_alloc_mm_table(struct amdgpu_device *adev)
+{
+        int r;
+
+        if (!amdgpu_sriov_vf(adev) || adev->virt.mm_table.gpu_addr)
+                return 0;
+
+        r = amdgpu_bo_create_kernel(adev, PAGE_SIZE, PAGE_SIZE,
+                                    AMDGPU_GEM_DOMAIN_VRAM,
+                                    &adev->virt.mm_table.bo,
+                                    &adev->virt.mm_table.gpu_addr,
+                                    (void *)&adev->virt.mm_table.cpu_addr);
+        if (r) {
+                DRM_ERROR("failed to alloc mm table and error = %d.\n", r);
+                return r;
+        }
+
+        memset((void *)adev->virt.mm_table.cpu_addr, 0, PAGE_SIZE);
+        DRM_INFO("MM table gpu addr = 0x%llx, cpu addr = %p.\n",
+                 adev->virt.mm_table.gpu_addr,
+                 adev->virt.mm_table.cpu_addr);
+        return 0;
+}
+
+/**
+ * amdgpu_virt_free_mm_table() - free mm table memory
+ * @amdgpu:     amdgpu device.
+ * Free MM table memory
+ */
+void amdgpu_virt_free_mm_table(struct amdgpu_device *adev)
+{
+        if (!amdgpu_sriov_vf(adev) || !adev->virt.mm_table.gpu_addr)
+                return;
+
+        amdgpu_bo_free_kernel(&adev->virt.mm_table.bo,
+                              &adev->virt.mm_table.gpu_addr,
+                              (void *)&adev->virt.mm_table.cpu_addr);
+        adev->virt.mm_table.gpu_addr = 0;
+}