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Commit ba1fc175 authored by FUJITA Tomonori's avatar FUJITA Tomonori Committed by James Bottomley
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[SCSI] libsas: add SAS management protocol handler 



This patch adds support for SAS Management Protocol (SMP) passthrough
support via bsg. aic94xx can use this.

Signed-off-by: default avatarFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@SteelEye.com>
parent 7aa68e80

drivers/scsi/libsas/sas_expander.c

+48 −0
Original line number Diff line number Diff line
@@ -23,6 +23,7 @@ 
 */



#include <linux/scatterlist.h>

#include <linux/blkdev.h>



#include "sas_internal.h"
@@ -1972,3 +1973,50 @@ static ssize_t smp_portal_read(struct kobject *kobj, 
	return res;

}

#endif



int sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,

		    struct request *req)

{

	struct domain_device *dev;

	int ret, type = rphy->identify.device_type;

	struct request *rsp = req->next_rq;



	if (!rsp) {

		printk("%s: space for a smp response is missing\n",

		       __FUNCTION__);

		return -EINVAL;

	}



	/* seems aic94xx doesn't support */

	if (!rphy) {

		printk("%s: can we send a smp request to a host?\n",

		       __FUNCTION__);

		return -EINVAL;

	}



	if (type != SAS_EDGE_EXPANDER_DEVICE &&

	    type != SAS_FANOUT_EXPANDER_DEVICE) {

		printk("%s: can we send a smp request to a device?\n",

		       __FUNCTION__);

		return -EINVAL;

	}



	dev = sas_find_dev_by_rphy(rphy);

	if (!dev) {

		printk("%s: fail to find a domain_device?\n", __FUNCTION__);

		return -EINVAL;

	}



	/* do we need to support multiple segments? */

	if (req->bio->bi_vcnt > 1 || rsp->bio->bi_vcnt > 1) {

		printk("%s: multiple segments req %u %u, rsp %u %u\n",

		       __FUNCTION__, req->bio->bi_vcnt, req->data_len,

		       rsp->bio->bi_vcnt, rsp->data_len);

		return -EINVAL;

	}



	ret = smp_execute_task(dev, bio_data(req->bio), req->data_len,

			       bio_data(rsp->bio), rsp->data_len);



	return ret;

}

drivers/scsi/libsas/sas_init.c

+1 −0
Original line number Diff line number Diff line
@@ -259,6 +259,7 @@ static struct sas_function_template sft = { 
	.phy_reset = sas_phy_reset,

	.set_phy_speed = sas_set_phy_speed,

	.get_linkerrors = sas_get_linkerrors,

	.smp_handler = sas_smp_handler,

};



struct scsi_transport_template *

include/scsi/libsas.h

+2 −0
Original line number Diff line number Diff line
@@ -674,4 +674,6 @@ extern void sas_target_destroy(struct scsi_target *); 
extern int sas_slave_alloc(struct scsi_device *);

extern int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg);



extern int sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,

			   struct request *req);

#endif /* _SASLIB_H_ */