summaryrefslogtreecommitdiffstats
path: root/drivers/scsi/lpfc/lpfc_sli.h
blob: edb48832c39bdd76ec8fdf329260a0822b129198 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
/*******************************************************************
 * This file is part of the Emulex Linux Device Driver for         *
 * Fibre Channel Host Bus Adapters.                                *
 * Copyright (C) 2004-2014 Emulex.  All rights reserved.           *
 * EMULEX and SLI are trademarks of Emulex.                        *
 * www.emulex.com                                                  *
 *                                                                 *
 * This program is free software; you can redistribute it and/or   *
 * modify it under the terms of version 2 of the GNU General       *
 * Public License as published by the Free Software Foundation.    *
 * This program is distributed in the hope that it will be useful. *
 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
 * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
 * more details, a copy of which can be found in the file COPYING  *
 * included with this package.                                     *
 *******************************************************************/

/* forward declaration for LPFC_IOCB_t's use */
struct lpfc_hba;
struct lpfc_vport;

/* Define the context types that SLI handles for abort and sums. */
typedef enum _lpfc_ctx_cmd {
	LPFC_CTX_LUN,
	LPFC_CTX_TGT,
	LPFC_CTX_HOST
} lpfc_ctx_cmd;

struct lpfc_cq_event {
	struct list_head list;
	union {
		struct lpfc_mcqe		mcqe_cmpl;
		struct lpfc_acqe_link		acqe_link;
		struct lpfc_acqe_fip		acqe_fip;
		struct lpfc_acqe_dcbx		acqe_dcbx;
		struct lpfc_acqe_grp5		acqe_grp5;
		struct lpfc_acqe_fc_la		acqe_fc;
		struct lpfc_acqe_sli		acqe_sli;
		struct lpfc_rcqe		rcqe_cmpl;
		struct sli4_wcqe_xri_aborted	wcqe_axri;
		struct lpfc_wcqe_complete	wcqe_cmpl;
	} cqe;
};

/* This structure is used to handle IOCB requests / responses */
struct lpfc_iocbq {
	/* lpfc_iocbqs are used in double linked lists */
	struct list_head list;
	struct list_head clist;
	struct list_head dlist;
	uint16_t iotag;         /* pre-assigned IO tag */
	uint16_t sli4_lxritag;  /* logical pre-assigned XRI. */
	uint16_t sli4_xritag;   /* pre-assigned XRI, (OXID) tag. */
	struct lpfc_cq_event cq_event;

	IOCB_t iocb;		/* IOCB cmd */
	uint8_t retry;		/* retry counter for IOCB cmd - if needed */
	uint32_t iocb_flag;
#define LPFC_IO_LIBDFC		1	/* libdfc iocb */
#define LPFC_IO_WAKE		2	/* Synchronous I/O completed */
#define LPFC_IO_WAKE_TMO	LPFC_IO_WAKE /* Synchronous I/O timed out */
#define LPFC_IO_FCP		4	/* FCP command -- iocbq in scsi_buf */
#define LPFC_DRIVER_ABORTED	8	/* driver aborted this request */
#define LPFC_IO_FABRIC		0x10	/* Iocb send using fabric scheduler */
#define LPFC_DELAY_MEM_FREE	0x20    /* Defer free'ing of FC data */
#define LPFC_EXCHANGE_BUSY	0x40    /* SLI4 hba reported XB in response */
#define LPFC_USE_FCPWQIDX	0x80    /* Submit to specified FCPWQ index */
#define DSS_SECURITY_OP		0x100	/* security IO */
#define LPFC_IO_ON_TXCMPLQ	0x200	/* The IO is still on the TXCMPLQ */
#define LPFC_IO_DIF_PASS	0x400	/* T10 DIF IO pass-thru prot */
#define LPFC_IO_DIF_STRIP	0x800	/* T10 DIF IO strip prot */
#define LPFC_IO_DIF_INSERT	0x1000	/* T10 DIF IO insert prot */
#define LPFC_IO_CMD_OUTSTANDING	0x2000 /* timeout handler abort window */

#define LPFC_FIP_ELS_ID_MASK	0xc000	/* ELS_ID range 0-3, non-shifted mask */
#define LPFC_FIP_ELS_ID_SHIFT	14

#define LPFC_IO_OAS		0x10000 /* OAS FCP IO */

	uint32_t drvrTimeout;	/* driver timeout in seconds */
	uint32_t fcp_wqidx;	/* index to FCP work queue */
	struct lpfc_vport *vport;/* virtual port pointer */
	void *context1;		/* caller context information */
	void *context2;		/* caller context information */
	void *context3;		/* caller context information */
	union {
		wait_queue_head_t    *wait_queue;
		struct lpfc_iocbq    *rsp_iocb;
		struct lpfcMboxq     *mbox;
		struct lpfc_nodelist *ndlp;
		struct lpfc_node_rrq *rrq;
	} context_un;

	void (*fabric_iocb_cmpl) (struct lpfc_hba *, struct lpfc_iocbq *,
			   struct lpfc_iocbq *);
	void (*wait_iocb_cmpl) (struct lpfc_hba *, struct lpfc_iocbq *,
			   struct lpfc_iocbq *);
	void (*iocb_cmpl) (struct lpfc_hba *, struct lpfc_iocbq *,
			   struct lpfc_iocbq *);
};

#define SLI_IOCB_RET_IOCB      1	/* Return IOCB if cmd ring full */

#define IOCB_SUCCESS        0
#define IOCB_BUSY           1
#define IOCB_ERROR          2
#define IOCB_TIMEDOUT       3

#define LPFC_MBX_WAKE		1
#define LPFC_MBX_IMED_UNREG	2

typedef struct lpfcMboxq {
	/* MBOXQs are used in single linked lists */
	struct list_head list;	/* ptr to next mailbox command */
	union {
		MAILBOX_t mb;		/* Mailbox cmd */
		struct lpfc_mqe mqe;
	} u;
	struct lpfc_vport *vport;/* virtual port pointer */
	void *context1;		/* caller context information */
	void *context2;		/* caller context information */

	void (*mbox_cmpl) (struct lpfc_hba *, struct lpfcMboxq *);
	uint8_t mbox_flag;
	uint16_t in_ext_byte_len;
	uint16_t out_ext_byte_len;
	uint8_t  mbox_offset_word;
	struct lpfc_mcqe mcqe;
	struct lpfc_mbx_nembed_sge_virt *sge_array;
} LPFC_MBOXQ_t;

#define MBX_POLL        1	/* poll mailbox till command done, then
				   return */
#define MBX_NOWAIT      2	/* issue command then return immediately */

#define LPFC_MAX_RING_MASK  5	/* max num of rctl/type masks allowed per
				   ring */
#define LPFC_SLI3_MAX_RING  4	/* Max num of SLI3 rings used by driver.
				   For SLI4, an additional ring for each
				   FCP WQ will be allocated.  */

struct lpfc_sli_ring;

struct lpfc_sli_ring_mask {
	uint8_t profile;	/* profile associated with ring */
	uint8_t rctl;	/* rctl / type pair configured for ring */
	uint8_t type;	/* rctl / type pair configured for ring */
	uint8_t rsvd;
	/* rcv'd unsol event */
	void (*lpfc_sli_rcv_unsol_event) (struct lpfc_hba *,
					 struct lpfc_sli_ring *,
					 struct lpfc_iocbq *);
};


/* Structure used to hold SLI statistical counters and info */
struct lpfc_sli_ring_stat {
	uint64_t iocb_event;	 /* IOCB event counters */
	uint64_t iocb_cmd;	 /* IOCB cmd issued */
	uint64_t iocb_rsp;	 /* IOCB rsp received */
	uint64_t iocb_cmd_delay; /* IOCB cmd ring delay */
	uint64_t iocb_cmd_full;	 /* IOCB cmd ring full */
	uint64_t iocb_cmd_empty; /* IOCB cmd ring is now empty */
	uint64_t iocb_rsp_full;	 /* IOCB rsp ring full */
};

struct lpfc_sli3_ring {
	uint32_t local_getidx;  /* last available cmd index (from cmdGetInx) */
	uint32_t next_cmdidx;   /* next_cmd index */
	uint32_t rspidx;	/* current index in response ring */
	uint32_t cmdidx;	/* current index in command ring */
	uint16_t numCiocb;	/* number of command iocb's per ring */
	uint16_t numRiocb;	/* number of rsp iocb's per ring */
	uint16_t sizeCiocb;	/* Size of command iocb's in this ring */
	uint16_t sizeRiocb;	/* Size of response iocb's in this ring */
	uint32_t *cmdringaddr;	/* virtual address for cmd rings */
	uint32_t *rspringaddr;	/* virtual address for rsp rings */
};

struct lpfc_sli4_ring {
	struct lpfc_queue *wqp;	/* Pointer to associated WQ */
};


/* Structure used to hold SLI ring information */
struct lpfc_sli_ring {
	uint16_t flag;		/* ring flags */
#define LPFC_DEFERRED_RING_EVENT 0x001	/* Deferred processing a ring event */
#define LPFC_CALL_RING_AVAILABLE 0x002	/* indicates cmd was full */
#define LPFC_STOP_IOCB_EVENT     0x020	/* Stop processing IOCB cmds event */
	uint16_t abtsiotag;	/* tracks next iotag to use for ABTS */

	uint8_t rsvd;
	uint8_t ringno;		/* ring number */

	spinlock_t ring_lock;	/* lock for issuing commands */

	uint32_t fast_iotag;	/* max fastlookup based iotag           */
	uint32_t iotag_ctr;	/* keeps track of the next iotag to use */
	uint32_t iotag_max;	/* max iotag value to use               */
	struct list_head txq;
	uint16_t txq_cnt;	/* current length of queue */
	uint16_t txq_max;	/* max length */
	struct list_head txcmplq;
	uint16_t txcmplq_cnt;	/* current length of queue */
	uint16_t txcmplq_max;	/* max length */
	uint32_t missbufcnt;	/* keep track of buffers to post */
	struct list_head postbufq;
	uint16_t postbufq_cnt;	/* current length of queue */
	uint16_t postbufq_max;	/* max length */
	struct list_head iocb_continueq;
	uint16_t iocb_continueq_cnt;	/* current length of queue */
	uint16_t iocb_continueq_max;	/* max length */
	struct list_head iocb_continue_saveq;

	struct lpfc_sli_ring_mask prt[LPFC_MAX_RING_MASK];
	uint32_t num_mask;	/* number of mask entries in prt array */
	void (*lpfc_sli_rcv_async_status) (struct lpfc_hba *,
		struct lpfc_sli_ring *, struct lpfc_iocbq *);

	struct lpfc_sli_ring_stat stats;	/* SLI statistical info */

	/* cmd ring available */
	void (*lpfc_sli_cmd_available) (struct lpfc_hba *,
					struct lpfc_sli_ring *);
	union {
		struct lpfc_sli3_ring sli3;
		struct lpfc_sli4_ring sli4;
	} sli;
};

/* Structure used for configuring rings to a specific profile or rctl / type */
struct lpfc_hbq_init {
	uint32_t rn;		/* Receive buffer notification */
	uint32_t entry_count;	/* max # of entries in HBQ */
	uint32_t headerLen;	/* 0 if not profile 4 or 5 */
	uint32_t logEntry;	/* Set to 1 if this HBQ used for LogEntry */
	uint32_t profile;	/* Selection profile 0=all, 7=logentry */
	uint32_t ring_mask;	/* Binds HBQ to a ring e.g. Ring0=b0001,
				 * ring2=b0100 */
	uint32_t hbq_index;	/* index of this hbq in ring .HBQs[] */

	uint32_t seqlenoff;
	uint32_t maxlen;
	uint32_t seqlenbcnt;
	uint32_t cmdcodeoff;
	uint32_t cmdmatch[8];
	uint32_t mask_count;	/* number of mask entries in prt array */
	struct hbq_mask hbqMasks[6];

	/* Non-config rings fields to keep track of buffer allocations */
	uint32_t buffer_count;	/* number of buffers allocated */
	uint32_t init_count;	/* number to allocate when initialized */
	uint32_t add_count;	/* number to allocate when starved */
} ;

/* Structure used to hold SLI statistical counters and info */
struct lpfc_sli_stat {
	uint64_t mbox_stat_err;  /* Mbox cmds completed status error */
	uint64_t mbox_cmd;       /* Mailbox commands issued */
	uint64_t sli_intr;       /* Count of Host Attention interrupts */
	uint64_t sli_prev_intr;  /* Previous cnt of Host Attention interrupts */
	uint64_t sli_ips;        /* Host Attention interrupts per sec */
	uint32_t err_attn_event; /* Error Attn event counters */
	uint32_t link_event;     /* Link event counters */
	uint32_t mbox_event;     /* Mailbox event counters */
	uint32_t mbox_busy;	 /* Mailbox cmd busy */
};

/* Structure to store link status values when port stats are reset */
struct lpfc_lnk_stat {
	uint32_t link_failure_count;
	uint32_t loss_of_sync_count;
	uint32_t loss_of_signal_count;
	uint32_t prim_seq_protocol_err_count;
	uint32_t invalid_tx_word_count;
	uint32_t invalid_crc_count;
	uint32_t error_frames;
	uint32_t link_events;
};

/* Structure used to hold SLI information */
struct lpfc_sli {
	uint32_t num_rings;
	uint32_t sli_flag;

	/* Additional sli_flags */
#define LPFC_SLI_MBOX_ACTIVE      0x100	/* HBA mailbox is currently active */
#define LPFC_SLI_ACTIVE           0x200	/* SLI in firmware is active */
#define LPFC_PROCESS_LA           0x400	/* Able to process link attention */
#define LPFC_BLOCK_MGMT_IO        0x800	/* Don't allow mgmt mbx or iocb cmds */
#define LPFC_MENLO_MAINT          0x1000 /* need for menl fw download */
#define LPFC_SLI_ASYNC_MBX_BLK    0x2000 /* Async mailbox is blocked */

	struct lpfc_sli_ring *ring;
	int fcp_ring;		/* ring used for FCP initiator commands */
	int next_ring;

	int extra_ring;		/* extra ring used for other protocols */

	struct lpfc_sli_stat slistat;	/* SLI statistical info */
	struct list_head mboxq;
	uint16_t mboxq_cnt;	/* current length of queue */
	uint16_t mboxq_max;	/* max length */
	LPFC_MBOXQ_t *mbox_active;	/* active mboxq information */
	struct list_head mboxq_cmpl;

	struct timer_list mbox_tmo;	/* Hold clk to timeout active mbox
					   cmd */

#define LPFC_IOCBQ_LOOKUP_INCREMENT  1024
	struct lpfc_iocbq ** iocbq_lookup; /* array to lookup IOCB by IOTAG */
	size_t iocbq_lookup_len;           /* current lengs of the array */
	uint16_t  last_iotag;              /* last allocated IOTAG */
	unsigned long  stats_start;        /* in seconds */
	struct lpfc_lnk_stat lnk_stat_offsets;
};

/* Timeout for normal outstanding mbox command (Seconds) */
#define LPFC_MBOX_TMO				30
/* Timeout for non-flash-based outstanding sli_config mbox command (Seconds) */
#define LPFC_MBOX_SLI4_CONFIG_TMO		60
/* Timeout for flash-based outstanding sli_config mbox command (Seconds) */
#define LPFC_MBOX_SLI4_CONFIG_EXTENDED_TMO	300
/* Timeout for other flash-based outstanding mbox command (Seconds) */
#define LPFC_MBOX_TMO_FLASH_CMD			300