Am 15.08.19 um 09:27 schrieb Christoph Hellwig:
> radeon uses a need_dma32 flag to indicate to the drm core that some
> allocations need to be done using GFP_DMA32, but it only checks the
> device addressing capabilities to make that decision. Unfortunately
> PCIe root ports that have limited addressing exist as well. Use the
> dma_addressing_limited instead to also take those into account.
>
> Reported-by: Atish Patra <atish.pa...@wdc.com>
> Signed-off-by: Christoph Hellwig <h...@lst.de>
Looks sane to me. Reviewed-by: Christian König <christian.koe...@amd.com>.
Should we merge this through our normal amdgpu/radeon branches or do you
want to send this upstream somehow else?
Thanks,
Christian.
> ---
> drivers/gpu/drm/radeon/radeon.h | 1 -
> drivers/gpu/drm/radeon/radeon_device.c | 12 +++++-------
> drivers/gpu/drm/radeon/radeon_ttm.c | 2 +-
> 3 files changed, 6 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
> index 32808e50be12..1a0b22526a75 100644
> --- a/drivers/gpu/drm/radeon/radeon.h
> +++ b/drivers/gpu/drm/radeon/radeon.h
> @@ -2387,7 +2387,6 @@ struct radeon_device {
> struct radeon_wb wb;
> struct radeon_dummy_page dummy_page;
> bool shutdown;
> - bool need_dma32;
> bool need_swiotlb;
> bool accel_working;
> bool fastfb_working; /* IGP feature*/
> diff --git a/drivers/gpu/drm/radeon/radeon_device.c
> b/drivers/gpu/drm/radeon/radeon_device.c
> index dceb554e5674..b8cc05826667 100644
> --- a/drivers/gpu/drm/radeon/radeon_device.c
> +++ b/drivers/gpu/drm/radeon/radeon_device.c
> @@ -1365,27 +1365,25 @@ int radeon_device_init(struct radeon_device *rdev,
> else
> rdev->mc.mc_mask = 0xffffffffULL; /* 32 bit MC */
>
> - /* set DMA mask + need_dma32 flags.
> + /* set DMA mask.
> * PCIE - can handle 40-bits.
> * IGP - can handle 40-bits
> * AGP - generally dma32 is safest
> * PCI - dma32 for legacy pci gart, 40 bits on newer asics
> */
> - rdev->need_dma32 = false;
> + dma_bits = 40;
> if (rdev->flags & RADEON_IS_AGP)
> - rdev->need_dma32 = true;
> + dma_bits = 32;
> if ((rdev->flags & RADEON_IS_PCI) &&
> (rdev->family <= CHIP_RS740))
> - rdev->need_dma32 = true;
> + dma_bits = 32;
> #ifdef CONFIG_PPC64
> if (rdev->family == CHIP_CEDAR)
> - rdev->need_dma32 = true;
> + dma_bits = 32;
> #endif
>
> - dma_bits = rdev->need_dma32 ? 32 : 40;
> r = pci_set_dma_mask(rdev->pdev, DMA_BIT_MASK(dma_bits));
> if (r) {
> - rdev->need_dma32 = true;
> dma_bits = 32;
> pr_warn("radeon: No suitable DMA available\n");
> }
> diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c
> b/drivers/gpu/drm/radeon/radeon_ttm.c
> index fb3696bc616d..116a27b25dc4 100644
> --- a/drivers/gpu/drm/radeon/radeon_ttm.c
> +++ b/drivers/gpu/drm/radeon/radeon_ttm.c
> @@ -794,7 +794,7 @@ int radeon_ttm_init(struct radeon_device *rdev)
> r = ttm_bo_device_init(&rdev->mman.bdev,
> &radeon_bo_driver,
> rdev->ddev->anon_inode->i_mapping,
> - rdev->need_dma32);
> + dma_addressing_limited(&rdev->pdev->dev));
> if (r) {
> DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
> return r;
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