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| author | Niranjana Vishwanathapura <niranjana.vishwanathapura@intel.com> | 2023-05-16 06:26:53 +0300 |
|---|---|---|
| committer | Rodrigo Vivi <rodrigo.vivi@intel.com> | 2023-12-20 02:34:01 +0300 |
| commit | 1b1d3710380d5f0517dcaabe1b96b6401f68ec37 (patch) | |
| tree | 3c58bafc2a821c4f033e78dfa64be24565965bc4 /drivers/gpu/drm/xe/xe_mmio.c | |
| parent | 6ed6ba32dba14ef851ecb7190597d6bac77618e2 (diff) | |
| download | linux-1b1d3710380d5f0517dcaabe1b96b6401f68ec37.tar.xz | |
drm/xe: Apply upper limit to sg element size
The iommu_dma_map_sg() function ensures iova allocation doesn't
cross dma segment boundary. It does so by padding some sg elements.
This can cause overflow, ending up with sg->length being set to 0.
Avoid this by halving the maximum segment size (rounded down to
PAGE_SIZE).
Specify maximum segment size for sg elements by using
sg_alloc_table_from_pages_segment() to allocate sg_table.
v2: Use correct max segment size in dma_set_max_seg_size() call
Signed-off-by: Niranjana Vishwanathapura <niranjana.vishwanathapura@intel.com>
Reviewed-by: Bruce Chang <yu.bruce.chang@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Diffstat (limited to 'drivers/gpu/drm/xe/xe_mmio.c')
| -rw-r--r-- | drivers/gpu/drm/xe/xe_mmio.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/drivers/gpu/drm/xe/xe_mmio.c b/drivers/gpu/drm/xe/xe_mmio.c index c7fbb1cc1f64..4c270a07136e 100644 --- a/drivers/gpu/drm/xe/xe_mmio.c +++ b/drivers/gpu/drm/xe/xe_mmio.c @@ -11,6 +11,7 @@ #include "regs/xe_engine_regs.h" #include "regs/xe_gt_regs.h" #include "regs/xe_regs.h" +#include "xe_bo.h" #include "xe_device.h" #include "xe_gt.h" #include "xe_gt_mcr.h" @@ -26,11 +27,7 @@ static int xe_set_dma_info(struct xe_device *xe) unsigned int mask_size = xe->info.dma_mask_size; int err; - /* - * We don't have a max segment size, so set it to the max so sg's - * debugging layer doesn't complain - */ - dma_set_max_seg_size(xe->drm.dev, UINT_MAX); + dma_set_max_seg_size(xe->drm.dev, xe_sg_segment_size(xe->drm.dev)); err = dma_set_mask(xe->drm.dev, DMA_BIT_MASK(mask_size)); if (err) |