linux-stable/kernel/dma
Jianxiong Gao f8e71c667e swiotlb: respect min_align_mask
commit: 1f221a0d0d

swiotlb: respect min_align_mask

Respect the min_align_mask in struct device_dma_parameters in swiotlb.

There are two parts to it:
 1) for the lower bits of the alignment inside the io tlb slot, just
    extent the size of the allocation and leave the start of the slot
     empty
 2) for the high bits ensure we find a slot that matches the high bits
    of the alignment to avoid wasting too much memory

Based on an earlier patch from Jianxiong Gao <jxgao@google.com>.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Jianxiong Gao <jxgao@google.com>
Tested-by: Jianxiong Gao <jxgao@google.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Jianxiong Gao <jxgao@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-07 11:04:32 +02:00
..
coherent.c dma-mapping: split <linux/dma-mapping.h> 2020-10-06 07:07:03 +02:00
contiguous.c dma-mapping updates for 5.10 2020-10-15 14:43:29 -07:00
debug.c dma-mapping: move dma-debug.h to kernel/dma/ 2020-10-06 07:07:05 +02:00
debug.h dma-mapping: move dma-debug.h to kernel/dma/ 2020-10-06 07:07:05 +02:00
direct.c kernel/: fix repeated words in comments 2020-10-16 11:11:19 -07:00
direct.h dma-mapping: move large parts of <linux/dma-direct.h> to kernel/dma 2020-10-06 07:07:06 +02:00
dummy.c dma-mapping: split <linux/dma-mapping.h> 2020-10-06 07:07:03 +02:00
Kconfig dma-mapping: merge <linux/dma-contiguous.h> into <linux/dma-map-ops.h> 2020-10-06 07:07:04 +02:00
Makefile dma-mapping: move dma_common_{mmap,get_sgtable} out of mapping.c 2020-09-11 09:14:56 +02:00
mapping.c dma-mapping: move large parts of <linux/dma-direct.h> to kernel/dma 2020-10-06 07:07:06 +02:00
ops_helpers.c dma-mapping: merge <linux/dma-noncoherent.h> into <linux/dma-map-ops.h> 2020-10-06 07:07:06 +02:00
pool.c dma-mapping: merge <linux/dma-noncoherent.h> into <linux/dma-map-ops.h> 2020-10-06 07:07:06 +02:00
remap.c dma-mapping: move more functions to dma-map-ops.h 2020-10-20 10:41:07 +02:00
swiotlb.c swiotlb: respect min_align_mask 2021-05-07 11:04:32 +02:00
virt.c dma-mapping: split <linux/dma-mapping.h> 2020-10-06 07:07:03 +02:00