aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/infiniband/ulp/iser/iscsi_iser.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/infiniband/ulp/iser/iscsi_iser.c')
-rw-r--r--drivers/infiniband/ulp/iser/iscsi_iser.c93
1 files changed, 64 insertions, 29 deletions
diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.c b/drivers/infiniband/ulp/iser/iscsi_iser.c
index dd03cfe596d6..25f195ef44b0 100644
--- a/drivers/infiniband/ulp/iser/iscsi_iser.c
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.c
@@ -5,7 +5,7 @@
* Copyright (C) 2004 Alex Aizman
* Copyright (C) 2005 Mike Christie
* Copyright (c) 2005, 2006 Voltaire, Inc. All rights reserved.
- * Copyright (c) 2013 Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2013-2014 Mellanox Technologies. All rights reserved.
* maintained by openib-general@openib.org
*
* This software is available to you under a choice of one of two
@@ -82,6 +82,8 @@ static unsigned int iscsi_max_lun = 512;
module_param_named(max_lun, iscsi_max_lun, uint, S_IRUGO);
int iser_debug_level = 0;
+bool iser_pi_enable = false;
+int iser_pi_guard = 0;
MODULE_DESCRIPTION("iSER (iSCSI Extensions for RDMA) Datamover");
MODULE_LICENSE("Dual BSD/GPL");
@@ -91,6 +93,12 @@ MODULE_VERSION(DRV_VER);
module_param_named(debug_level, iser_debug_level, int, 0644);
MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0 (default:disabled)");
+module_param_named(pi_enable, iser_pi_enable, bool, 0644);
+MODULE_PARM_DESC(pi_enable, "Enable T10-PI offload support (default:disabled)");
+
+module_param_named(pi_guard, iser_pi_guard, int, 0644);
+MODULE_PARM_DESC(pi_guard, "T10-PI guard_type, 0:CRC|1:IP_CSUM (default:CRC)");
+
struct iser_global ig;
void
@@ -138,8 +146,8 @@ static int iscsi_iser_pdu_alloc(struct iscsi_task *task, uint8_t opcode)
int iser_initialize_task_headers(struct iscsi_task *task,
struct iser_tx_desc *tx_desc)
{
- struct iscsi_iser_conn *iser_conn = task->conn->dd_data;
- struct iser_device *device = iser_conn->ib_conn->device;
+ struct iser_conn *ib_conn = task->conn->dd_data;
+ struct iser_device *device = ib_conn->device;
struct iscsi_iser_task *iser_task = task->dd_data;
u64 dma_addr;
@@ -153,7 +161,7 @@ int iser_initialize_task_headers(struct iscsi_task *task,
tx_desc->tx_sg[0].length = ISER_HEADERS_LEN;
tx_desc->tx_sg[0].lkey = device->mr->lkey;
- iser_task->iser_conn = iser_conn;
+ iser_task->ib_conn = ib_conn;
return 0;
}
/**
@@ -176,6 +184,8 @@ iscsi_iser_task_init(struct iscsi_task *task)
iser_task->command_sent = 0;
iser_task_rdma_init(iser_task);
+ iser_task->sc = task->sc;
+
return 0;
}
@@ -278,10 +288,9 @@ iscsi_iser_task_xmit(struct iscsi_task *task)
static void iscsi_iser_cleanup_task(struct iscsi_task *task)
{
struct iscsi_iser_task *iser_task = task->dd_data;
- struct iser_tx_desc *tx_desc = &iser_task->desc;
-
- struct iscsi_iser_conn *iser_conn = task->conn->dd_data;
- struct iser_device *device = iser_conn->ib_conn->device;
+ struct iser_tx_desc *tx_desc = &iser_task->desc;
+ struct iser_conn *ib_conn = task->conn->dd_data;
+ struct iser_device *device = ib_conn->device;
ib_dma_unmap_single(device->ib_device,
tx_desc->dma_addr, ISER_HEADERS_LEN, DMA_TO_DEVICE);
@@ -296,14 +305,25 @@ static void iscsi_iser_cleanup_task(struct iscsi_task *task)
}
}
+static u8 iscsi_iser_check_protection(struct iscsi_task *task, sector_t *sector)
+{
+ struct iscsi_iser_task *iser_task = task->dd_data;
+
+ if (iser_task->dir[ISER_DIR_IN])
+ return iser_check_task_pi_status(iser_task, ISER_DIR_IN,
+ sector);
+ else
+ return iser_check_task_pi_status(iser_task, ISER_DIR_OUT,
+ sector);
+}
+
static struct iscsi_cls_conn *
iscsi_iser_conn_create(struct iscsi_cls_session *cls_session, uint32_t conn_idx)
{
struct iscsi_conn *conn;
struct iscsi_cls_conn *cls_conn;
- struct iscsi_iser_conn *iser_conn;
- cls_conn = iscsi_conn_setup(cls_session, sizeof(*iser_conn), conn_idx);
+ cls_conn = iscsi_conn_setup(cls_session, 0, conn_idx);
if (!cls_conn)
return NULL;
conn = cls_conn->dd_data;
@@ -314,10 +334,6 @@ iscsi_iser_conn_create(struct iscsi_cls_session *cls_session, uint32_t conn_idx)
*/
conn->max_recv_dlength = ISER_RECV_DATA_SEG_LEN;
- iser_conn = conn->dd_data;
- conn->dd_data = iser_conn;
- iser_conn->iscsi_conn = conn;
-
return cls_conn;
}
@@ -325,8 +341,7 @@ static void
iscsi_iser_conn_destroy(struct iscsi_cls_conn *cls_conn)
{
struct iscsi_conn *conn = cls_conn->dd_data;
- struct iscsi_iser_conn *iser_conn = conn->dd_data;
- struct iser_conn *ib_conn = iser_conn->ib_conn;
+ struct iser_conn *ib_conn = conn->dd_data;
iscsi_conn_teardown(cls_conn);
/*
@@ -335,7 +350,7 @@ iscsi_iser_conn_destroy(struct iscsi_cls_conn *cls_conn)
* we free it here.
*/
if (ib_conn) {
- ib_conn->iser_conn = NULL;
+ ib_conn->iscsi_conn = NULL;
iser_conn_put(ib_conn, 1); /* deref iscsi/ib conn unbinding */
}
}
@@ -346,7 +361,6 @@ iscsi_iser_conn_bind(struct iscsi_cls_session *cls_session,
int is_leading)
{
struct iscsi_conn *conn = cls_conn->dd_data;
- struct iscsi_iser_conn *iser_conn;
struct iscsi_session *session;
struct iser_conn *ib_conn;
struct iscsi_endpoint *ep;
@@ -373,11 +387,11 @@ iscsi_iser_conn_bind(struct iscsi_cls_session *cls_session,
/* binds the iSER connection retrieved from the previously
* connected ep_handle to the iSCSI layer connection. exchanges
* connection pointers */
- iser_info("binding iscsi/iser conn %p %p to ib_conn %p\n",
- conn, conn->dd_data, ib_conn);
- iser_conn = conn->dd_data;
- ib_conn->iser_conn = iser_conn;
- iser_conn->ib_conn = ib_conn;
+ iser_info("binding iscsi conn %p to ib_conn %p\n", conn, ib_conn);
+
+ conn->dd_data = ib_conn;
+ ib_conn->iscsi_conn = conn;
+
iser_conn_get(ib_conn); /* ref iscsi/ib conn binding */
return 0;
}
@@ -386,8 +400,7 @@ static void
iscsi_iser_conn_stop(struct iscsi_cls_conn *cls_conn, int flag)
{
struct iscsi_conn *conn = cls_conn->dd_data;
- struct iscsi_iser_conn *iser_conn = conn->dd_data;
- struct iser_conn *ib_conn = iser_conn->ib_conn;
+ struct iser_conn *ib_conn = conn->dd_data;
/*
* Userspace may have goofed up and not bound the connection or
@@ -401,7 +414,7 @@ iscsi_iser_conn_stop(struct iscsi_cls_conn *cls_conn, int flag)
*/
iser_conn_put(ib_conn, 1); /* deref iscsi/ib conn unbinding */
}
- iser_conn->ib_conn = NULL;
+ conn->dd_data = NULL;
}
static void iscsi_iser_session_destroy(struct iscsi_cls_session *cls_session)
@@ -413,6 +426,17 @@ 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,
@@ -437,8 +461,18 @@ 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))
@@ -618,7 +652,7 @@ iscsi_iser_ep_disconnect(struct iscsi_endpoint *ep)
struct iser_conn *ib_conn;
ib_conn = ep->dd_data;
- if (ib_conn->iser_conn)
+ if (ib_conn->iscsi_conn)
/*
* Must suspend xmit path if the ep is bound to the
* iscsi_conn, so we know we are not accessing the ib_conn
@@ -626,7 +660,7 @@ iscsi_iser_ep_disconnect(struct iscsi_endpoint *ep)
*
* This may not be bound if the ep poll failed.
*/
- iscsi_suspend_tx(ib_conn->iser_conn->iscsi_conn);
+ iscsi_suspend_tx(ib_conn->iscsi_conn);
iser_info("ib conn %p state %d\n", ib_conn, ib_conn->state);
@@ -732,6 +766,7 @@ static struct iscsi_transport iscsi_iser_transport = {
.xmit_task = iscsi_iser_task_xmit,
.cleanup_task = iscsi_iser_cleanup_task,
.alloc_pdu = iscsi_iser_pdu_alloc,
+ .check_protection = iscsi_iser_check_protection,
/* recovery */
.session_recovery_timedout = iscsi_session_recovery_timedout,
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.