From ba1fc175cc6c0af7e78241e50160344f0f198282 Mon Sep 17 00:00:00 2001
From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Date: Mon, 9 Jul 2007 12:52:08 +0900
Subject: [PATCH] [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: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
---
drivers/scsi/libsas/sas_expander.c | 48 ++++++++++++++++++++++++++++++
drivers/scsi/libsas/sas_init.c | 1 +
include/scsi/libsas.h | 2 ++
3 files changed, 51 insertions(+)
diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c
index 969fd3eb494a..a81195354b9c 100644
--- a/drivers/scsi/libsas/sas_expander.c
+++ b/drivers/scsi/libsas/sas_expander.c
@@ -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;
+}
diff --git a/drivers/scsi/libsas/sas_init.c b/drivers/scsi/libsas/sas_init.c
index 965698c8b7bf..98360272f40a 100644
--- a/drivers/scsi/libsas/sas_init.c
+++ b/drivers/scsi/libsas/sas_init.c
@@ -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 *
diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h
index 9275a46bf2e3..df36461fe881 100644
--- a/include/scsi/libsas.h
+++ b/include/scsi/libsas.h
@@ -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_ */
--
2.34.1