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IB/iser: Publish T10-PI support to SCSI midlayer 

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>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Sagi Grimberg 2014-03-05 19:43:51 +02:00 committed by Roland Dreier
parent 0a7a08ad6f
commit 6192d4e6bb
1 changed files with 22 additions and 1 deletions
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23
drivers/infiniband/ulp/iser/iscsi_iser.c
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@ -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))