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| author | Uma Krishnan <ukrishn@linux.vnet.ibm.com> | 2018-03-26 19:32:56 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2018-04-19 02:32:49 +0300 |
| commit | 012f394cb81c61dd1207caecaaeed20caf0a8e36 (patch) | |
| tree | 4e86054818cea7255b85ac6e2de509e81be8eb1c /drivers/scsi/cxlflash/ocxl_hw.c | |
| parent | 6b938ac91017d9375bda42251f559ae135623fbd (diff) | |
| download | linux-012f394cb81c61dd1207caecaaeed20caf0a8e36.tar.xz | |
scsi: cxlflash: Support process specific mappings
Once the context is started, the assigned MMIO space can be mapped and
unmapped. Provide means to map and unmap the context MMIO space.
Signed-off-by: Uma Krishnan <ukrishn@linux.vnet.ibm.com>
Acked-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/cxlflash/ocxl_hw.c')
| -rw-r--r-- | drivers/scsi/cxlflash/ocxl_hw.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/scsi/cxlflash/ocxl_hw.c b/drivers/scsi/cxlflash/ocxl_hw.c index b39a03d149d0..73b0b104439c 100644 --- a/drivers/scsi/cxlflash/ocxl_hw.c +++ b/drivers/scsi/cxlflash/ocxl_hw.c @@ -151,6 +151,28 @@ err1: } /** + * ocxlflash_psa_map() - map the process specific MMIO space + * @ctx_cookie: Adapter context for which the mapping needs to be done. + * + * Return: MMIO pointer of the mapped region + */ +static void __iomem *ocxlflash_psa_map(void *ctx_cookie) +{ + struct ocxlflash_context *ctx = ctx_cookie; + + return ioremap(ctx->psn_phys, ctx->psn_size); +} + +/** + * ocxlflash_psa_unmap() - unmap the process specific MMIO space + * @addr: MMIO pointer to unmap. + */ +static void ocxlflash_psa_unmap(void __iomem *addr) +{ + iounmap(addr); +} + +/** * ocxlflash_process_element() - get process element of the adapter context * @ctx_cookie: Adapter context associated with the process element. * @@ -618,6 +640,8 @@ static void *ocxlflash_fops_get_context(struct file *file) /* Backend ops to ocxlflash services */ const struct cxlflash_backend_ops cxlflash_ocxl_ops = { .module = THIS_MODULE, + .psa_map = ocxlflash_psa_map, + .psa_unmap = ocxlflash_psa_unmap, .process_element = ocxlflash_process_element, .start_context = ocxlflash_start_context, .set_master = ocxlflash_set_master, |