efct_lio.h

  1/* SPDX-License-Identifier: GPL-2.0 */
  2/*
  3 * Copyright (C) 2021 Broadcom. All Rights Reserved. The term
  4 * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
  5 */
  6
  7#ifndef __EFCT_LIO_H__
  8#define __EFCT_LIO_H__
  9
 10#include "efct_scsi.h"
 11#include <target/target_core_base.h>
 12
 13#define efct_lio_io_printf(io, fmt, ...)			\
 14	efc_log_debug(io->efct,					\
 15		"[%s] [%04x][i:%04x t:%04x h:%04x]" fmt,\
 16		io->node->display_name, io->instance_index,	\
 17		io->init_task_tag, io->tgt_task_tag, io->hw_tag,\
 18		##__VA_ARGS__)
 19
 20#define efct_lio_tmfio_printf(io, fmt, ...)			\
 21	efc_log_debug(io->efct,					\
 22		"[%s] [%04x][i:%04x t:%04x h:%04x][f:%02x]" fmt,\
 23		io->node->display_name, io->instance_index,	\
 24		io->init_task_tag, io->tgt_task_tag, io->hw_tag,\
 25		io->tgt_io.tmf,  ##__VA_ARGS__)
 26
 27#define efct_set_lio_io_state(io, value) (io->tgt_io.state |= value)
 28
 29struct efct_lio_wq_data {
 30	struct efct		*efct;
 31	void			*ptr;
 32	struct work_struct	work;
 33};
 34
 35/* Target private efct structure */
 36struct efct_scsi_tgt {
 37	u32			max_sge;
 38	u32			max_sgl;
 39
 40	/*
 41	 * Variables used to send task set full. We are using a high watermark
 42	 * method to send task set full. We will reserve a fixed number of IOs
 43	 * per initiator plus a fudge factor. Once we reach this number,
 44	 * then the target will start sending task set full/busy responses.
 45	 */
 46	atomic_t		initiator_count;
 47	atomic_t		ios_in_use;
 48	atomic_t		io_high_watermark;
 49
 50	atomic_t		watermark_hit;
 51	int			watermark_min;
 52	int			watermark_max;
 53
 54	struct efct_lio_nport	*lio_nport;
 55	struct efct_lio_tpg	*tpg;
 56
 57	struct list_head	vport_list;
 58	/* Protects vport list*/
 59	spinlock_t		efct_lio_lock;
 60
 61	u64			wwnn;
 62};
 63
 64struct efct_scsi_tgt_nport {
 65	struct efct_lio_nport	*lio_nport;
 66};
 67
 68struct efct_node {
 69	struct list_head	list_entry;
 70	struct kref		ref;
 71	void			(*release)(struct kref *arg);
 72	struct efct		*efct;
 73	struct efc_node		*node;
 74	struct se_session	*session;
 75	spinlock_t		active_ios_lock;
 76	struct list_head	active_ios;
 77	char			display_name[EFC_NAME_LENGTH];
 78	u32			port_fc_id;
 79	u32			node_fc_id;
 80	u32			vpi;
 81	u32			rpi;
 82	u32			abort_cnt;
 83};
 84
 85#define EFCT_LIO_STATE_SCSI_RECV_CMD		(1 << 0)
 86#define EFCT_LIO_STATE_TGT_SUBMIT_CMD		(1 << 1)
 87#define EFCT_LIO_STATE_TFO_QUEUE_DATA_IN	(1 << 2)
 88#define EFCT_LIO_STATE_TFO_WRITE_PENDING	(1 << 3)
 89#define EFCT_LIO_STATE_TGT_EXECUTE_CMD		(1 << 4)
 90#define EFCT_LIO_STATE_SCSI_SEND_RD_DATA	(1 << 5)
 91#define EFCT_LIO_STATE_TFO_CHK_STOP_FREE	(1 << 6)
 92#define EFCT_LIO_STATE_SCSI_DATA_DONE		(1 << 7)
 93#define EFCT_LIO_STATE_TFO_QUEUE_STATUS		(1 << 8)
 94#define EFCT_LIO_STATE_SCSI_SEND_RSP		(1 << 9)
 95#define EFCT_LIO_STATE_SCSI_RSP_DONE		(1 << 10)
 96#define EFCT_LIO_STATE_TGT_GENERIC_FREE		(1 << 11)
 97#define EFCT_LIO_STATE_SCSI_RECV_TMF		(1 << 12)
 98#define EFCT_LIO_STATE_TGT_SUBMIT_TMR		(1 << 13)
 99#define EFCT_LIO_STATE_TFO_WRITE_PEND_STATUS	(1 << 14)
100#define EFCT_LIO_STATE_TGT_GENERIC_REQ_FAILURE  (1 << 15)
101
102#define EFCT_LIO_STATE_TFO_ABORTED_TASK		(1 << 29)
103#define EFCT_LIO_STATE_TFO_RELEASE_CMD		(1 << 30)
104#define EFCT_LIO_STATE_SCSI_CMPL_CMD		(1u << 31)
105
106struct efct_scsi_tgt_io {
107	struct se_cmd		cmd;
108	unsigned char		sense_buffer[TRANSPORT_SENSE_BUFFER];
109	enum dma_data_direction	ddir;
110	int			task_attr;
111	u64			lun;
112
113	u32			state;
114	u8			tmf;
115	struct efct_io		*io_to_abort;
116	u32			seg_map_cnt;
117	u32			seg_cnt;
118	u32			cur_seg;
119	enum efct_scsi_io_status err;
120	bool			aborting;
121	bool			rsp_sent;
122	u32			transferred_len;
123};
124
125/* Handler return codes */
126enum {
127	SCSI_HANDLER_DATAPHASE_STARTED = 1,
128	SCSI_HANDLER_RESP_STARTED,
129	SCSI_HANDLER_VALIDATED_DATAPHASE_STARTED,
130	SCSI_CMD_NOT_SUPPORTED,
131};
132
133#define WWN_NAME_LEN		32
134struct efct_lio_vport {
135	u64			wwpn;
136	u64			npiv_wwpn;
137	u64			npiv_wwnn;
138	unsigned char		wwpn_str[WWN_NAME_LEN];
139	struct se_wwn		vport_wwn;
140	struct efct_lio_tpg	*tpg;
141	struct efct		*efct;
142	struct Scsi_Host	*shost;
143	struct fc_vport		*fc_vport;
144	atomic_t		enable;
145};
146
147struct efct_lio_nport {
148	u64			wwpn;
149	unsigned char		wwpn_str[WWN_NAME_LEN];
150	struct se_wwn		nport_wwn;
151	struct efct_lio_tpg	*tpg;
152	struct efct		*efct;
153	atomic_t		enable;
154};
155
156struct efct_lio_tpg_attrib {
157	u32			generate_node_acls;
158	u32			cache_dynamic_acls;
159	u32			demo_mode_write_protect;
160	u32			prod_mode_write_protect;
161	u32			demo_mode_login_only;
162	bool			session_deletion_wait;
163};
164
165struct efct_lio_tpg {
166	struct se_portal_group	tpg;
167	struct efct_lio_nport	*nport;
168	struct efct_lio_vport	*vport;
169	struct efct_lio_tpg_attrib tpg_attrib;
170	unsigned short		tpgt;
171	bool			enabled;
172};
173
174struct efct_lio_nacl {
175	u64			nport_wwnn;
176	char			nport_name[WWN_NAME_LEN];
177	struct se_session	*session;
178	struct se_node_acl	se_node_acl;
179};
180
181struct efct_lio_vport_list_t {
182	struct list_head	list_entry;
183	struct efct_lio_vport	*lio_vport;
184};
185
186int efct_scsi_tgt_driver_init(void);
187int efct_scsi_tgt_driver_exit(void);
188
189#endif /*__EFCT_LIO_H__ */