[PATCH v1 13/13] IB/iser: Publish T10-PI support to SCSI midlayer

Sagi Grimberg
2014-02-27T11:13:09Z

After allocating a scsi_host we set protection types
and guard type supported.

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Alex Tabachnik <alext@mellanox.com>
---
drivers/infiniband/ulp/iser/iscsi_iser.c | 23 ++++++++++++++++++++++-
1 files changed, 22 insertions(+), 1 deletions(-)

diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.c b/drivers/infiniband/ulp/iser/iscsi_iser.c
index f13d7e9..a0ec2d0 100644
--- a/drivers/infiniband/ulp/iser/iscsi_iser.c
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.c
@@ -435,6 +435,17 @@ static void iscsi_iser_session_destroy(struct iscsi_cls_session *cls_session)
iscsi_host_free(shost);
}

+static inline unsigned int
+iser_dif_prot_caps(int prot_caps)
+{
+ return ((prot_caps & IB_PROT_T10DIF_TYPE_1) ? SHOST_DIF_TYPE1_PROTECTION |
+ SHOST_DIX_TYPE1_PROTECTION : 0) |
+ ((prot_caps & IB_PROT_T10DIF_TYPE_2) ? SHOST_DIF_TYPE2_PROTECTION |
+ SHOST_DIX_TYPE2_PROTECTION : 0) |
+ ((prot_caps & IB_PROT_T10DIF_TYPE_3) ? SHOST_DIF_TYPE3_PROTECTION |
+ SHOST_DIX_TYPE3_PROTECTION : 0);
+}
+
static struct iscsi_cls_session *
iscsi_iser_session_create(struct iscsi_endpoint *ep,
uint16_t cmds_max, uint16_t qdepth,
@@ -459,8 +470,18 @@ iscsi_iser_session_create(struct iscsi_endpoint *ep,
* older userspace tools (before 2.0-870) did not pass us
* the leading conn's ep so this will be NULL;
*/
- if (ep)
+ if (ep) {
ib_conn = ep->dd_data;
+ if (ib_conn->pi_support) {
+ u32 sig_caps = ib_conn->device->dev_attr.sig_prot_cap;
+
+ scsi_host_set_prot(shost, iser_dif_prot_caps(sig_caps));
+ if (iser_pi_guard)
+ scsi_host_set_guard(shost, SHOST_DIX_GUARD_IP);
+ else
+ scsi_host_set_guard(shost, SHOST_DIX_GUARD_CRC);
+ }
+ }

if (iscsi_host_add(shost,
ep ? ib_conn->device->ib_device->dma_device : NULL))
--
1.7.1