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author | Jim Quinlan <james.quinlan@broadcom.com> | 2020-09-17 18:43:40 +0200 |
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committer | Christoph Hellwig <hch@lst.de> | 2020-09-17 18:43:56 +0200 |
commit | e0d072782c734d27f5af062c62266f2598f68542 (patch) | |
tree | f259e9eaab55ae8ffedaea07a19e8f147dcceb9a /crypto/pcrypt.c | |
parent | usb: don't inherity DMA properties for USB devices (diff) | |
download | linux-e0d072782c734d27f5af062c62266f2598f68542.tar.xz linux-e0d072782c734d27f5af062c62266f2598f68542.zip |
dma-mapping: introduce DMA range map, supplanting dma_pfn_offset
The new field 'dma_range_map' in struct device is used to facilitate the
use of single or multiple offsets between mapping regions of cpu addrs and
dma addrs. It subsumes the role of "dev->dma_pfn_offset" which was only
capable of holding a single uniform offset and had no region bounds
checking.
The function of_dma_get_range() has been modified so that it takes a single
argument -- the device node -- and returns a map, NULL, or an error code.
The map is an array that holds the information regarding the DMA regions.
Each range entry contains the address offset, the cpu_start address, the
dma_start address, and the size of the region.
of_dma_configure() is the typical manner to set range offsets but there are
a number of ad hoc assignments to "dev->dma_pfn_offset" in the kernel
driver code. These cases now invoke the function
dma_direct_set_offset(dev, cpu_addr, dma_addr, size).
Signed-off-by: Jim Quinlan <james.quinlan@broadcom.com>
[hch: various interface cleanups]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Tested-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Tested-by: Nathan Chancellor <natechancellor@gmail.com>
Diffstat (limited to 'crypto/pcrypt.c')
0 files changed, 0 insertions, 0 deletions