From a9d4ef643430d638de1910377f50e0d492d85a43 Mon Sep 17 00:00:00 2001 From: Oded Gabbay <ogabbay@kernel.org> Date: Mon, 11 Jan 2021 13:49:38 +0200 Subject: [PATCH] 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 <ogabbay@kernel.org> --- drivers/misc/habanalabs/gaudi/gaudi.c | 3 ++- drivers/misc/habanalabs/goya/goya.c | 3 ++- 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/misc/habanalabs/gaudi/gaudi.c b/drivers/misc/habanalabs/gaudi/gaudi.c index 8c09e4466af8..b328ddaa64ee 100644 --- a/drivers/misc/habanalabs/gaudi/gaudi.c +++ b/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); diff --git a/drivers/misc/habanalabs/goya/goya.c b/drivers/misc/habanalabs/goya/goya.c index b8b4aa636b7c..63679a747d2c 100644 --- a/drivers/misc/habanalabs/goya/goya.c +++ b/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); -- 2.30.9