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Commit 012f394c authored by Uma Krishnan's avatar Uma Krishnan Committed by Martin K. Petersen
Browse files

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: default avatarUma Krishnan <ukrishn@linux.vnet.ibm.com>
Acked-by: default avatarMatthew R. Ochs <mrochs@linux.vnet.ibm.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 6b938ac9

drivers/scsi/cxlflash/ocxl_hw.c

+24 −0
Original line number Diff line number Diff line
@@ -150,6 +150,28 @@ static struct file *ocxlflash_getfile(struct device *dev, const char *name, 
	goto out;

}



/**

 * 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,