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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#if !defined(__EFC_NODE_H__)
8#define __EFC_NODE_H__
9#include "scsi/fc/fc_ns.h"
10
11#define EFC_NODEDB_PAUSE_FABRIC_LOGIN (1 << 0)
12#define EFC_NODEDB_PAUSE_NAMESERVER (1 << 1)
13#define EFC_NODEDB_PAUSE_NEW_NODES (1 << 2)
14
15#define MAX_ACC_REJECT_PAYLOAD sizeof(struct fc_els_ls_rjt)
16
17#define scsi_io_printf(io, fmt, ...) \
18 efc_log_debug(io->efc, "[%s] [%04x][i:%04x t:%04x h:%04x]" fmt, \
19 io->node->display_name, io->instance_index, io->init_task_tag, \
20 io->tgt_task_tag, io->hw_tag, ##__VA_ARGS__)
21
22static inline void
23efc_node_evt_set(struct efc_sm_ctx *ctx, enum efc_sm_event evt,
24 const char *handler)
25{
26 struct efc_node *node = ctx->app;
27
28 if (evt == EFC_EVT_ENTER) {
29 strscpy_pad(node->current_state_name, handler,
30 sizeof(node->current_state_name));
31 } else if (evt == EFC_EVT_EXIT) {
32 memcpy(node->prev_state_name, node->current_state_name,
33 sizeof(node->prev_state_name));
34 strscpy_pad(node->current_state_name, "invalid",
35 sizeof(node->current_state_name));
36 }
37 node->prev_evt = node->current_evt;
38 node->current_evt = evt;
39}
40
41/**
42 * hold frames in pending frame list
43 *
44 * Unsolicited receive frames are held on the node pending frame list,
45 * rather than being processed.
46 */
47
48static inline void
49efc_node_hold_frames(struct efc_node *node)
50{
51 node->hold_frames = true;
52}
53
54/**
55 * accept frames
56 *
57 * Unsolicited receive frames processed rather than being held on the node
58 * pending frame list.
59 */
60
61static inline void
62efc_node_accept_frames(struct efc_node *node)
63{
64 node->hold_frames = false;
65}
66
67/*
68 * Node initiator/target enable defines
69 * All combinations of the SLI port (nport) initiator/target enable,
70 * and remote node initiator/target enable are enumerated.
71 * ex: EFC_NODE_ENABLE_T_TO_IT decodes to target mode is enabled on SLI port
72 * and I+T is enabled on remote node.
73 */
74enum efc_node_enable {
75 EFC_NODE_ENABLE_x_TO_x,
76 EFC_NODE_ENABLE_x_TO_T,
77 EFC_NODE_ENABLE_x_TO_I,
78 EFC_NODE_ENABLE_x_TO_IT,
79 EFC_NODE_ENABLE_T_TO_x,
80 EFC_NODE_ENABLE_T_TO_T,
81 EFC_NODE_ENABLE_T_TO_I,
82 EFC_NODE_ENABLE_T_TO_IT,
83 EFC_NODE_ENABLE_I_TO_x,
84 EFC_NODE_ENABLE_I_TO_T,
85 EFC_NODE_ENABLE_I_TO_I,
86 EFC_NODE_ENABLE_I_TO_IT,
87 EFC_NODE_ENABLE_IT_TO_x,
88 EFC_NODE_ENABLE_IT_TO_T,
89 EFC_NODE_ENABLE_IT_TO_I,
90 EFC_NODE_ENABLE_IT_TO_IT,
91};
92
93static inline enum efc_node_enable
94efc_node_get_enable(struct efc_node *node)
95{
96 u32 retval = 0;
97
98 if (node->nport->enable_ini)
99 retval |= (1U << 3);
100 if (node->nport->enable_tgt)
101 retval |= (1U << 2);
102 if (node->init)
103 retval |= (1U << 1);
104 if (node->targ)
105 retval |= (1U << 0);
106 return (enum efc_node_enable)retval;
107}
108
109int
110efc_node_check_els_req(struct efc_sm_ctx *ctx,
111 enum efc_sm_event evt, void *arg,
112 u8 cmd, void (*efc_node_common_func)(const char *,
113 struct efc_sm_ctx *, enum efc_sm_event, void *),
114 const char *funcname);
115int
116efc_node_check_ns_req(struct efc_sm_ctx *ctx,
117 enum efc_sm_event evt, void *arg,
118 u16 cmd, void (*efc_node_common_func)(const char *,
119 struct efc_sm_ctx *, enum efc_sm_event, void *),
120 const char *funcname);
121int
122efc_node_attach(struct efc_node *node);
123struct efc_node *
124efc_node_alloc(struct efc_nport *nport, u32 port_id,
125 bool init, bool targ);
126void
127efc_node_free(struct efc_node *efc);
128void
129efc_node_update_display_name(struct efc_node *node);
130void efc_node_post_event(struct efc_node *node, enum efc_sm_event evt,
131 void *arg);
132
133void
134__efc_node_shutdown(struct efc_sm_ctx *ctx,
135 enum efc_sm_event evt, void *arg);
136void
137__efc_node_wait_node_free(struct efc_sm_ctx *ctx,
138 enum efc_sm_event evt, void *arg);
139void
140__efc_node_wait_els_shutdown(struct efc_sm_ctx *ctx,
141 enum efc_sm_event evt, void *arg);
142void
143__efc_node_wait_ios_shutdown(struct efc_sm_ctx *ctx,
144 enum efc_sm_event evt, void *arg);
145void
146efc_node_save_sparms(struct efc_node *node, void *payload);
147void
148efc_node_transition(struct efc_node *node,
149 void (*state)(struct efc_sm_ctx *, enum efc_sm_event,
150 void *), void *data);
151void
152__efc_node_common(const char *funcname, struct efc_sm_ctx *ctx,
153 enum efc_sm_event evt, void *arg);
154
155void
156efc_node_initiate_cleanup(struct efc_node *node);
157
158void
159efc_node_build_eui_name(char *buf, u32 buf_len, uint64_t eui_name);
160
161void
162efc_node_pause(struct efc_node *node,
163 void (*state)(struct efc_sm_ctx *ctx,
164 enum efc_sm_event evt, void *arg));
165void
166__efc_node_paused(struct efc_sm_ctx *ctx,
167 enum efc_sm_event evt, void *arg);
168int
169efc_node_active_ios_empty(struct efc_node *node);
170void
171efc_node_send_ls_io_cleanup(struct efc_node *node);
172
173int
174efc_els_io_list_empty(struct efc_node *node, struct list_head *list);
175
176void
177efc_process_node_pending(struct efc_node *domain);
178
179u64 efc_node_get_wwnn(struct efc_node *node);
180struct efc_node *
181efc_node_find(struct efc_nport *nport, u32 id);
182void
183efc_node_post_els_resp(struct efc_node *node, u32 evt, void *arg);
184void
185efc_node_recv_els_frame(struct efc_node *node, struct efc_hw_sequence *s);
186void
187efc_node_recv_ct_frame(struct efc_node *node, struct efc_hw_sequence *seq);
188void
189efc_node_recv_fcp_cmd(struct efc_node *node, struct efc_hw_sequence *seq);
190
191#endif /* __EFC_NODE_H__ */