diff options
| author | Halil Pasic <pasic@linux.ibm.com> | 2024-03-07 13:28:08 +0100 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2024-03-13 09:23:46 +0100 |
| commit | e3e9bda38e6d9f2af50b521741071d6406b40152 (patch) | |
| tree | a08f3d97ded95c352b24cea3c03f8d681482b59d /arch/s390 | |
| parent | d5cc41686990fa522ce573e5c6c7a619f10c3fd1 (diff) | |
| download | linux-e3e9bda38e6d9f2af50b521741071d6406b40152.tar.gz | |
s390/virtio_ccw: use DMA handle from DMA API
Change and use ccw_device_dma_zalloc() so it returns a virtual address like
before, which can be used to access data. However also pass a new dma32_t
pointer type handle, which correlates to the returned virtual address.
This pointer is used to directly pass/set the DMA handle as returned by the
DMA API.
Signed-off-by: Halil Pasic <pasic@linux.ibm.com>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/ccwdev.h | 3 | ||||
| -rw-r--r-- | arch/s390/include/asm/cio.h | 2 |
2 files changed, 4 insertions, 1 deletions
diff --git a/arch/s390/include/asm/ccwdev.h b/arch/s390/include/asm/ccwdev.h index 91d261751d25b..436365ff6c19b 100644 --- a/arch/s390/include/asm/ccwdev.h +++ b/arch/s390/include/asm/ccwdev.h @@ -217,7 +217,8 @@ extern void ccw_device_destroy_console(struct ccw_device *); extern int ccw_device_enable_console(struct ccw_device *); extern void ccw_device_wait_idle(struct ccw_device *); -extern void *ccw_device_dma_zalloc(struct ccw_device *cdev, size_t size); +extern void *ccw_device_dma_zalloc(struct ccw_device *cdev, size_t size, + dma32_t *dma_handle); extern void ccw_device_dma_free(struct ccw_device *cdev, void *cpu_addr, size_t size); diff --git a/arch/s390/include/asm/cio.h b/arch/s390/include/asm/cio.h index 80aeff80b2dc6..b6b619f340a5e 100644 --- a/arch/s390/include/asm/cio.h +++ b/arch/s390/include/asm/cio.h @@ -365,6 +365,8 @@ extern struct device *cio_get_dma_css_dev(void); void *cio_gp_dma_zalloc(struct gen_pool *gp_dma, struct device *dma_dev, size_t size); +void *__cio_gp_dma_zalloc(struct gen_pool *gp_dma, struct device *dma_dev, + size_t size, dma32_t *dma_handle); void cio_gp_dma_free(struct gen_pool *gp_dma, void *cpu_addr, size_t size); void cio_gp_dma_destroy(struct gen_pool *gp_dma, struct device *dma_dev); struct gen_pool *cio_gp_dma_create(struct device *dma_dev, int nr_pages); |