scsi: qedi: Add QLogic FastLinQ offload iSCSI driver framework.

The QLogic FastLinQ Driver for iSCSI (qedi) is the iSCSI specific module
for 41000 Series Converged Network Adapters by QLogic.

This patch consists of following changes:

  - MAINTAINERS Makefile and Kconfig changes for qedi,
  - PCI driver registration,
  - iSCSI host level initialization,
  - Debugfs and log level infrastructure.

The following indiviual changes are merged into this commit:

  qedi: Add LL2 iSCSI interface for offload iSCSI.
  qedi: Add support for iSCSI session management.
  qedi: Add support for data path.

Signed-off-by: Nilesh Javali <nilesh.javali@cavium.com>
Signed-off-by: Adheer Chandravanshi <adheer.chandravanshi@qlogic.com>
Signed-off-by: Chad Dupuis <chad.dupuis@cavium.com>
Signed-off-by: Saurav Kashyap <saurav.kashyap@cavium.com>
Signed-off-by: Arun Easi <arun.easi@cavium.com>
Signed-off-by: Manish Rangankar <manish.rangankar@cavium.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

1 files changed, 73 insertions, 0 deletions

diff --git a/drivers/scsi/qedi/qedi_gbl.h b/drivers/scsi/qedi/qedi_gbl.h
new file mode 100644
index 000000000000..8e488de88ece
--- /dev/null
+++ b/drivers/scsi/qedi/qedi_gbl.h
@@ -0,0 +1,73 @@
+/*
+ * QLogic iSCSI Offload Driver
+ * Copyright (c) 2016 Cavium Inc.
+ *
+ * This software is available under the terms of the GNU General Public License
+ * (GPL) Version 2, available from the file COPYING in the main directory of
+ * this source tree.
+ */
+
+#ifndef _QEDI_GBL_H_
+#define _QEDI_GBL_H_
+
+#include "qedi_iscsi.h"
+
+extern uint qedi_io_tracing;
+extern int do_not_recover;
+extern struct scsi_host_template qedi_host_template;
+extern struct iscsi_transport qedi_iscsi_transport;
+extern const struct qed_iscsi_ops *qedi_ops;
+extern struct qedi_debugfs_ops qedi_debugfs_ops;
+extern const struct file_operations qedi_dbg_fops;
+extern struct device_attribute *qedi_shost_attrs[];
+
+int qedi_alloc_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep);
+void qedi_free_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep);
+
+int qedi_send_iscsi_login(struct qedi_conn *qedi_conn,
+			  struct iscsi_task *task);
+int qedi_send_iscsi_logout(struct qedi_conn *qedi_conn,
+			   struct iscsi_task *task);
+int qedi_iscsi_abort_work(struct qedi_conn *qedi_conn,
+			  struct iscsi_task *mtask);
+int qedi_send_iscsi_text(struct qedi_conn *qedi_conn,
+			 struct iscsi_task *task);
+int qedi_send_iscsi_nopout(struct qedi_conn *qedi_conn,
+			   struct iscsi_task *task,
+			   char *datap, int data_len, int unsol);
+int qedi_iscsi_send_ioreq(struct iscsi_task *task);
+int qedi_get_task_idx(struct qedi_ctx *qedi);
+void qedi_clear_task_idx(struct qedi_ctx *qedi, int idx);
+int qedi_iscsi_cleanup_task(struct iscsi_task *task,
+			    bool mark_cmd_node_deleted);
+void qedi_iscsi_unmap_sg_list(struct qedi_cmd *cmd);
+void qedi_update_itt_map(struct qedi_ctx *qedi, u32 tid, u32 proto_itt,
+			 struct qedi_cmd *qedi_cmd);
+void qedi_get_proto_itt(struct qedi_ctx *qedi, u32 tid, u32 *proto_itt);
+void qedi_get_task_tid(struct qedi_ctx *qedi, u32 itt, int16_t *tid);
+void qedi_process_iscsi_error(struct qedi_endpoint *ep,
+			      struct async_data *data);
+void qedi_start_conn_recovery(struct qedi_ctx *qedi,
+			      struct qedi_conn *qedi_conn);
+struct qedi_conn *qedi_get_conn_from_id(struct qedi_ctx *qedi, u32 iscsi_cid);
+void qedi_process_tcp_error(struct qedi_endpoint *ep, struct async_data *data);
+void qedi_mark_device_missing(struct iscsi_cls_session *cls_session);
+void qedi_mark_device_available(struct iscsi_cls_session *cls_session);
+void qedi_reset_host_mtu(struct qedi_ctx *qedi, u16 mtu);
+int qedi_recover_all_conns(struct qedi_ctx *qedi);
+void qedi_fp_process_cqes(struct qedi_work *work);
+int qedi_cleanup_all_io(struct qedi_ctx *qedi,
+			struct qedi_conn *qedi_conn,
+			struct iscsi_task *task, bool in_recovery);
+void qedi_trace_io(struct qedi_ctx *qedi, struct iscsi_task *task,
+		   u16 tid, int8_t direction);
+int qedi_alloc_id(struct qedi_portid_tbl *id_tbl, u16 id);
+u16 qedi_alloc_new_id(struct qedi_portid_tbl *id_tbl);
+void qedi_free_id(struct qedi_portid_tbl *id_tbl, u16 id);
+int qedi_create_sysfs_ctx_attr(struct qedi_ctx *qedi);
+void qedi_remove_sysfs_ctx_attr(struct qedi_ctx *qedi);
+void qedi_clearsq(struct qedi_ctx *qedi,
+		  struct qedi_conn *qedi_conn,
+		  struct iscsi_task *task);
+
+#endif