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[SCSI] libsas: add SAS management protocol handler

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

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
FUJITA Tomonori
2007-07-09 12:52:08 +09:00
committed by James Bottomley
parent 7aa68e80bd
commit ba1fc175cc
3 changed files with 51 additions and 0 deletions
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48
drivers/scsi/libsas/sas_expander.c
View File

@ -23,6 +23,7 @@
*/
#include <linux/scatterlist.h>
#include <linux/blkdev.h>
#include "sas_internal.h"
@ -1972,3 +1973,50 @@ out:
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;
}