drm/amdgpu: Set correct DMA mask for aldebaran

Aldebaran has 48-bit physical address support

Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
index e3b78b4..431742e 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -1553,7 +1553,7 @@ static void gmc_v9_0_save_registers(struct amdgpu_device *adev)
 
 static int gmc_v9_0_sw_init(void *handle)
 {
-       int r, vram_width = 0, vram_type = 0, vram_vendor = 0;
+       int r, vram_width = 0, vram_type = 0, vram_vendor = 0, dma_addr_bits;
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
        adev->gfxhub.funcs->init(adev);
@@ -1669,12 +1669,13 @@ static int gmc_v9_0_sw_init(void *handle)
         */
        adev->gmc.mc_mask = 0xffffffffffffULL; /* 48 bit MC */
 
-       r = dma_set_mask_and_coherent(adev->dev, DMA_BIT_MASK(44));
+       dma_addr_bits = adev->ip_versions[GC_HWIP][0] == IP_VERSION(9, 4, 2) ? 48:44;
+       r = dma_set_mask_and_coherent(adev->dev, DMA_BIT_MASK(dma_addr_bits));
        if (r) {
                printk(KERN_WARNING "amdgpu: No suitable DMA available.\n");
                return r;
        }
-       adev->need_swiotlb = drm_need_swiotlb(44);
+       adev->need_swiotlb = drm_need_swiotlb(dma_addr_bits);
 
        r = gmc_v9_0_mc_init(adev);
        if (r)