Searched hist:ae76f635d4e1cffa6870cc5472567ca9d6940a22 (Results 1 – 4 of 4) sorted by relevance
| /openbmc/linux/arch/csky/include/asm/ |
| H A D | cache.h | diff ae76f635d4e1cffa6870cc5472567ca9d6940a22 Tue Jul 30 04:16:28 CDT 2019 Guo Ren <ren_guo@c-sky.com> csky: Optimize arch_sync_dma_for_cpu/device with dma_inv_range
DMA_FROM_DEVICE only need to read dma data of memory into CPU cache,
so there is no need to clear cache before. Also clear + inv for
DMA_FROM_DEVICE won't cause problem, because the memory range for dma
won't be touched by software during dma working.
Changes for V2:
- Remove clr cache and ignore the DMA_TO_DEVICE in _for_cpu.
- Change inv to wbinv cache with DMA_FROM_DEVICE in _for_device.
Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Cc: Arnd Bergmann <arnd@arndb.de>
|
| /openbmc/linux/arch/csky/mm/ |
| H A D | cachev1.c | diff ae76f635d4e1cffa6870cc5472567ca9d6940a22 Tue Jul 30 04:16:28 CDT 2019 Guo Ren <ren_guo@c-sky.com> csky: Optimize arch_sync_dma_for_cpu/device with dma_inv_range
DMA_FROM_DEVICE only need to read dma data of memory into CPU cache,
so there is no need to clear cache before. Also clear + inv for
DMA_FROM_DEVICE won't cause problem, because the memory range for dma
won't be touched by software during dma working.
Changes for V2:
- Remove clr cache and ignore the DMA_TO_DEVICE in _for_cpu.
- Change inv to wbinv cache with DMA_FROM_DEVICE in _for_device.
Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Cc: Arnd Bergmann <arnd@arndb.de>
|
| H A D | cachev2.c | diff ae76f635d4e1cffa6870cc5472567ca9d6940a22 Tue Jul 30 04:16:28 CDT 2019 Guo Ren <ren_guo@c-sky.com> csky: Optimize arch_sync_dma_for_cpu/device with dma_inv_range
DMA_FROM_DEVICE only need to read dma data of memory into CPU cache,
so there is no need to clear cache before. Also clear + inv for
DMA_FROM_DEVICE won't cause problem, because the memory range for dma
won't be touched by software during dma working.
Changes for V2:
- Remove clr cache and ignore the DMA_TO_DEVICE in _for_cpu.
- Change inv to wbinv cache with DMA_FROM_DEVICE in _for_device.
Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Cc: Arnd Bergmann <arnd@arndb.de>
|
| H A D | dma-mapping.c | diff ae76f635d4e1cffa6870cc5472567ca9d6940a22 Tue Jul 30 04:16:28 CDT 2019 Guo Ren <ren_guo@c-sky.com> csky: Optimize arch_sync_dma_for_cpu/device with dma_inv_range
DMA_FROM_DEVICE only need to read dma data of memory into CPU cache,
so there is no need to clear cache before. Also clear + inv for
DMA_FROM_DEVICE won't cause problem, because the memory range for dma
won't be touched by software during dma working.
Changes for V2:
- Remove clr cache and ignore the DMA_TO_DEVICE in _for_cpu.
- Change inv to wbinv cache with DMA_FROM_DEVICE in _for_device.
Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Cc: Arnd Bergmann <arnd@arndb.de>
|