scsi: elx: libefc: Extended link Service I/O handling

Add library interface definitions for:

 - Functions to build and send ELS/CT/BLS commands and responses.

Link: https://lore.kernel.org/r/20210601235512.20104-16-jsmart2021@gmail.comReviewed-by: Daniel Wagner <dwagner@suse.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Co-developed-by: Ram Vegesna <ram.vegesna@broadcom.com>
Signed-off-by: Ram Vegesna <ram.vegesna@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/elx/libefc/efc_els.h

+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2021 Broadcom. All Rights Reserved. The term
+ * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
+ */
+
+#ifndef __EFC_ELS_H__
+#define __EFC_ELS_H__
+
+#define EFC_STATUS_INVALID	INT_MAX
+#define EFC_ELS_IO_POOL_SZ	1024
+
+struct efc_els_io_req {
+	struct list_head	list_entry;
+	struct kref		ref;
+	void			(*release)(struct kref *arg);
+	struct efc_node		*node;
+	void			*cb;
+	u32			els_retries_remaining;
+	bool			els_req_free;
+	struct timer_list       delay_timer;
+
+	const char		*display_name;
+
+	struct efc_disc_io	io;
+};
+
+typedef int(*efc_hw_srrs_cb_t)(void *arg, u32 length, int status,
+			       u32 ext_status);
+
+void _efc_els_io_free(struct kref *arg);
+struct efc_els_io_req *
+efc_els_io_alloc(struct efc_node *node, u32 reqlen);
+struct efc_els_io_req *
+efc_els_io_alloc_size(struct efc_node *node, u32 reqlen, u32 rsplen);
+void efc_els_io_free(struct efc_els_io_req *els);
+
+/* ELS command send */
+typedef void (*els_cb_t)(struct efc_node *node,
+			 struct efc_node_cb *cbdata, void *arg);
+int
+efc_send_plogi(struct efc_node *node);
+int
+efc_send_flogi(struct efc_node *node);
+int
+efc_send_fdisc(struct efc_node *node);
+int
+efc_send_prli(struct efc_node *node);
+int
+efc_send_prlo(struct efc_node *node);
+int
+efc_send_logo(struct efc_node *node);
+int
+efc_send_adisc(struct efc_node *node);
+int
+efc_send_pdisc(struct efc_node *node);
+int
+efc_send_scr(struct efc_node *node);
+int
+efc_ns_send_rftid(struct efc_node *node);
+int
+efc_ns_send_rffid(struct efc_node *node);
+int
+efc_ns_send_gidpt(struct efc_node *node);
+void
+efc_els_io_cleanup(struct efc_els_io_req *els, int evt, void *arg);
+
+/* ELS acc send */
+int
+efc_send_ls_acc(struct efc_node *node, u32 ox_id);
+int
+efc_send_ls_rjt(struct efc_node *node, u32 ox_id, u32 reason_cod,
+		u32 reason_code_expl, u32 vendor_unique);
+int
+efc_send_flogi_p2p_acc(struct efc_node *node, u32 ox_id, u32 s_id);
+int
+efc_send_flogi_acc(struct efc_node *node, u32 ox_id, u32 is_fport);
+int
+efc_send_plogi_acc(struct efc_node *node, u32 ox_id);
+int
+efc_send_prli_acc(struct efc_node *node, u32 ox_id);
+int
+efc_send_logo_acc(struct efc_node *node, u32 ox_id);
+int
+efc_send_prlo_acc(struct efc_node *node, u32 ox_id);
+int
+efc_send_adisc_acc(struct efc_node *node, u32 ox_id);
+
+int
+efc_bls_send_acc_hdr(struct efc *efc, struct efc_node *node,
+		     struct fc_frame_header *hdr);
+int
+efc_bls_send_rjt_hdr(struct efc_els_io_req *io, struct fc_frame_header *hdr);
+
+int
+efc_els_io_list_empty(struct efc_node *node, struct list_head *list);
+
+/* CT */
+int
+efc_send_ct_rsp(struct efc *efc, struct efc_node *node, u16 ox_id,
+		struct fc_ct_hdr *ct_hdr, u32 cmd_rsp_code, u32 reason_code,
+		u32 reason_code_explanation);
+
+int
+efc_send_bls_acc(struct efc_node *node, struct fc_frame_header *hdr);
+
+#endif /* __EFC_ELS_H__ */