@@ -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
@@ -317,6 +317,7 @@ struct iser_conn {
unsigned int rx_desc_head;
struct iser_rx_desc *rx_descs;
struct ib_recv_wr rx_wr[ISER_MIN_POSTED_RX];
+ bool pi_support;
/* Connection memory registration pool */
union {
@@ -371,6 +372,8 @@ struct iser_global {
extern struct iser_global ig;
extern int iser_debug_level;
+extern bool iser_pi_enable;
+extern int iser_pi_guard;
/* allocate connection resources needed for rdma functionality */
int iser_conn_set_full_featured_mode(struct iscsi_conn *conn);
@@ -607,6 +607,19 @@ static int iser_addr_handler(struct rdma_cm_id *cma_id)
ib_conn = (struct iser_conn *)cma_id->context;
ib_conn->device = device;
+ /* connection T10-PI support */
+ if (iser_pi_enable) {
+ if (!(device->dev_attr.device_cap_flags &
+ IB_DEVICE_SIGNATURE_HANDOVER)) {
+ iser_warn("T10-PI requested but not supported on %s, "
+ "continue without T10-PI\n",
+ ib_conn->device->ib_device->name);
+ ib_conn->pi_support = false;
+ } else {
+ ib_conn->pi_support = true;
+ }
+ }
+
ret = rdma_resolve_route(cma_id, 1000);
if (ret) {
iser_err("resolve route failed: %d\n", ret);