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authorFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>2007-07-09 12:52:08 +0900
committerJames Bottomley <jejb@mulgrave.localdomain>2007-07-18 11:18:20 -0500
commitba1fc175cc6c0af7e78241e50160344f0f198282 (patch)
tree019c21e5c4658c50b08e28d2077b37242a1d22db /drivers/scsi/libsas/sas_expander.c
parent7aa68e80bd481faae1234bc2a7e4bcc9348f98b4 (diff)
[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>
Diffstat (limited to 'drivers/scsi/libsas/sas_expander.c')
-rw-r--r--drivers/scsi/libsas/sas_expander.c48
1 files changed, 48 insertions, 0 deletions
diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c
index 969fd3eb494..a81195354b9 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;
+}