habanalabs: fix dma_addr passed to dma_mmap_coherent

When doing dma_alloc_coherent in the driver, we add a certain hard-coded
offset to the DMA address before returning to the callee function. This
offset is needed when our device use this DMA address to perform
outbound transactions to the host.

However, if we want to map the DMA'able memory to the user via
dma_mmap_coherent(), we need to pass the original dma address, without
this offset. Otherwise, we will get erronouos mapping.

Signed-off-by: Oded Gabbay <[email protected]>

Author: ogabbay

drivers/misc/habanalabs/gaudi/gaudi.c

@@ -4002,7 +4002,8 @@ static int gaudi_cb_mmap(struct hl_device *hdev, struct vm_area_struct *vma,
 	vma->vm_flags |= VM_IO | VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP |
 			VM_DONTCOPY | VM_NORESERVE;
 
-	rc = dma_mmap_coherent(hdev->dev, vma, cpu_addr, dma_addr, size);
+	rc = dma_mmap_coherent(hdev->dev, vma, cpu_addr,
+				(dma_addr - HOST_PHYS_BASE), size);
 	if (rc)
 		dev_err(hdev->dev, "dma_mmap_coherent error %d", rc);
 

drivers/misc/habanalabs/goya/goya.c

@@ -2719,7 +2719,8 @@ static int goya_cb_mmap(struct hl_device *hdev, struct vm_area_struct *vma,
 	vma->vm_flags |= VM_IO | VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP |
 			VM_DONTCOPY | VM_NORESERVE;
 
-	rc = dma_mmap_coherent(hdev->dev, vma, cpu_addr, dma_addr, size);
+	rc = dma_mmap_coherent(hdev->dev, vma, cpu_addr,
+				(dma_addr - HOST_PHYS_BASE), size);
 	if (rc)
 		dev_err(hdev->dev, "dma_mmap_coherent error %d", rc);