Displaying 6 results from an estimated 6 matches for "dma_get_max_seg_size".
2018 Apr 25
0
[PATCH v2 2/5] dma-mapping: Introduce dma_iommu_detach_device() API
...mapping.h
+++ b/include/linux/dma-mapping.h
@@ -671,6 +671,8 @@ static inline void arch_setup_dma_ops(struct device *dev, u64 dma_base,
static inline void arch_teardown_dma_ops(struct device *dev) { }
#endif
+extern void dma_iommu_detach_device(struct device *dev);
+
static inline unsigned int dma_get_max_seg_size(struct device *dev)
{
if (dev->dma_parms && dev->dma_parms->max_segment_size)
--
2.17.0
2019 Dec 21
0
[PATCH 8/8] DO NOT MERGE: iommu: disable list appending in dma-iommu
...0644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -853,8 +853,7 @@ static int __finalise_sg(struct device *dev, struct scatterlist *sg, int nents,
{
struct scatterlist *s, *cur = sg;
unsigned long seg_mask = dma_get_seg_boundary(dev);
- unsigned int cur_len = 0, max_len = dma_get_max_seg_size(dev);
- int i, count = 0;
+ int i;
for_each_sg(sg, s, nents, i) {
/* Restore this segment's original unaligned fields first */
@@ -862,39 +861,16 @@ static int __finalise_sg(struct device *dev, struct scatterlist *sg, int nents,
unsigned int s_length = sg_dma_len(s);
unsigned int s...
2018 Apr 25
5
[PATCH 1/4] drm/nouveau: tegra: Detach from ARM DMA/IOMMU mapping
From: Thierry Reding <treding at nvidia.com>
Depending on the kernel configuration, early ARM architecture setup code
may have attached the GPU to a DMA/IOMMU mapping that transparently uses
the IOMMU to back the DMA API. Tegra requires special handling for IOMMU
backed buffers (a special bit in the GPU's MMU page tables indicates the
memory path to take: via the SMMU or directly to the
2018 Apr 25
11
[PATCH v2 1/5] drm/nouveau: tegra: Detach from ARM DMA/IOMMU mapping
From: Thierry Reding <treding at nvidia.com>
Depending on the kernel configuration, early ARM architecture setup code
may have attached the GPU to a DMA/IOMMU mapping that transparently uses
the IOMMU to back the DMA API. Tegra requires special handling for IOMMU
backed buffers (a special bit in the GPU's MMU page tables indicates the
memory path to take: via the SMMU or directly to the
2019 Dec 21
13
[PATCH 0/8] Convert the intel iommu driver to the dma-iommu api
This patchset converts the intel iommu driver to the dma-iommu api.
While converting the driver I exposed a bug in the intel i915 driver which causes a huge amount of artifacts on the screen of my laptop. You can see a picture of it here:
https://github.com/pippy360/kernelPatches/blob/master/IMG_20191219_225922.jpg
This issue is most likely in the i915 driver and is most likely caused by the
2019 Dec 21
13
[PATCH 0/8] Convert the intel iommu driver to the dma-iommu api
This patchset converts the intel iommu driver to the dma-iommu api.
While converting the driver I exposed a bug in the intel i915 driver which causes a huge amount of artifacts on the screen of my laptop. You can see a picture of it here:
https://github.com/pippy360/kernelPatches/blob/master/IMG_20191219_225922.jpg
This issue is most likely in the i915 driver and is most likely caused by the