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Commit 45e6cdf4 authored by Darrick J. Wong's avatar Darrick J. Wong Committed by James Bottomley
Browse files

[SCSI] libsas: Provide a transport-level facility to request SAS addrs 



Provide a facility to use the request_firmware() interface to get a SAS
address from userspace.  This can be used by SAS LLDDs that cannot
obtain the address from the host adapter.

Signed-off-by: default avatarDarrick J. Wong <djwong@us.ibm.com>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@HansenPartnership.com>
parent 7e23ea48

drivers/scsi/libsas/sas_scsi_host.c

+41 −0
Original line number Original line Diff line number Diff line
@@ -24,6 +24,8 @@ 
 */

 */





#include <linux/kthread.h>

#include <linux/kthread.h>

#include <linux/firmware.h>

#include <linux/ctype.h>





#include "sas_internal.h"

#include "sas_internal.h"
@@ -1064,6 +1066,45 @@ void sas_target_destroy(struct scsi_target *starget) 
	return;

	return;

}

}





static void sas_parse_addr(u8 *sas_addr, const char *p)

{

	int i;

	for (i = 0; i < SAS_ADDR_SIZE; i++) {

		u8 h, l;

		if (!*p)

			break;

		h = isdigit(*p) ? *p-'0' : toupper(*p)-'A'+10;

		p++;

		l = isdigit(*p) ? *p-'0' : toupper(*p)-'A'+10;

		p++;

		sas_addr[i] = (h<<4) | l;

	}

}



#define SAS_STRING_ADDR_SIZE	16



int sas_request_addr(struct Scsi_Host *shost, u8 *addr)

{

	int res;

	const struct firmware *fw;



	res = request_firmware(&fw, "sas_addr", &shost->shost_gendev);

	if (res)

		return res;



	if (fw->size < SAS_STRING_ADDR_SIZE) {

		res = -ENODEV;

		goto out;

	}



	sas_parse_addr(addr, fw->data);



out:

	release_firmware(fw);

	return res;

}

EXPORT_SYMBOL_GPL(sas_request_addr);



EXPORT_SYMBOL_GPL(sas_queuecommand);

EXPORT_SYMBOL_GPL(sas_queuecommand);

EXPORT_SYMBOL_GPL(sas_target_alloc);

EXPORT_SYMBOL_GPL(sas_target_alloc);

EXPORT_SYMBOL_GPL(sas_slave_configure);

EXPORT_SYMBOL_GPL(sas_slave_configure);

include/scsi/libsas.h

+2 −0
Original line number Original line Diff line number Diff line
@@ -677,4 +677,6 @@ extern void sas_ssp_task_response(struct device *dev, struct sas_task *task, 
				  struct ssp_response_iu *iu);

				  struct ssp_response_iu *iu);

struct sas_phy *sas_find_local_phy(struct domain_device *dev);

struct sas_phy *sas_find_local_phy(struct domain_device *dev);





int sas_request_addr(struct Scsi_Host *shost, u8 *addr);



#endif /* _SASLIB_H_ */
 
#endif /* _SASLIB_H_ */