1 /*******************************************************************
2  * This file is part of the Emulex Linux Device Driver for         *
3  * Fibre Channel Host Bus Adapters.                                *
4  * Copyright (C) 2004-2007 Emulex.  All rights reserved.           *
5  * EMULEX and SLI are trademarks of Emulex.                        *
6  * www.emulex.com                                                  *
7  *                                                                 *
8  * This program is free software; you can redistribute it and/or   *
9  * modify it under the terms of version 2 of the GNU General       *
10  * Public License as published by the Free Software Foundation.    *
11  * This program is distributed in the hope that it will be useful. *
12  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
13  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
14  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
15  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
16  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
17  * more details, a copy of which can be found in the file COPYING  *
18  * included with this package.                                     *
19  *******************************************************************/
20 
21 /* forward declaration for LPFC_IOCB_t's use */
22 struct lpfc_hba;
23 struct lpfc_vport;
24 
25 /* Define the context types that SLI handles for abort and sums. */
26 typedef enum _lpfc_ctx_cmd {
27 	LPFC_CTX_LUN,
28 	LPFC_CTX_TGT,
29 	LPFC_CTX_HOST
30 } lpfc_ctx_cmd;
31 
32 struct lpfc_cq_event {
33 	struct list_head list;
34 	union {
35 		struct lpfc_mcqe		mcqe_cmpl;
36 		struct lpfc_acqe_link		acqe_link;
37 		struct lpfc_acqe_fip		acqe_fip;
38 		struct lpfc_acqe_dcbx		acqe_dcbx;
39 		struct lpfc_acqe_grp5		acqe_grp5;
40 		struct lpfc_acqe_fc_la		acqe_fc;
41 		struct lpfc_acqe_sli		acqe_sli;
42 		struct lpfc_rcqe		rcqe_cmpl;
43 		struct sli4_wcqe_xri_aborted	wcqe_axri;
44 		struct lpfc_wcqe_complete	wcqe_cmpl;
45 	} cqe;
46 };
47 
48 /* This structure is used to handle IOCB requests / responses */
49 struct lpfc_iocbq {
50 	/* lpfc_iocbqs are used in double linked lists */
51 	struct list_head list;
52 	struct list_head clist;
53 	struct list_head dlist;
54 	uint16_t iotag;         /* pre-assigned IO tag */
55 	uint16_t sli4_lxritag;  /* logical pre-assigned XRI. */
56 	uint16_t sli4_xritag;   /* pre-assigned XRI, (OXID) tag. */
57 	struct lpfc_cq_event cq_event;
58 
59 	IOCB_t iocb;		/* IOCB cmd */
60 	uint8_t retry;		/* retry counter for IOCB cmd - if needed */
61 	uint16_t iocb_flag;
62 #define LPFC_IO_LIBDFC		1	/* libdfc iocb */
63 #define LPFC_IO_WAKE		2	/* High Priority Queue signal flag */
64 #define LPFC_IO_FCP		4	/* FCP command -- iocbq in scsi_buf */
65 #define LPFC_DRIVER_ABORTED	8	/* driver aborted this request */
66 #define LPFC_IO_FABRIC		0x10	/* Iocb send using fabric scheduler */
67 #define LPFC_DELAY_MEM_FREE	0x20    /* Defer free'ing of FC data */
68 #define LPFC_EXCHANGE_BUSY	0x40    /* SLI4 hba reported XB in response */
69 #define LPFC_USE_FCPWQIDX	0x80    /* Submit to specified FCPWQ index */
70 #define DSS_SECURITY_OP		0x100	/* security IO */
71 #define LPFC_IO_ON_Q		0x200	/* The IO is still on the TXCMPLQ */
72 #define LPFC_IO_DIF		0x400	/* T10 DIF IO */
73 
74 #define LPFC_FIP_ELS_ID_MASK	0xc000	/* ELS_ID range 0-3, non-shifted mask */
75 #define LPFC_FIP_ELS_ID_SHIFT	14
76 
77 	uint8_t rsvd2;
78 	uint32_t drvrTimeout;	/* driver timeout in seconds */
79 	uint32_t fcp_wqidx;	/* index to FCP work queue */
80 	struct lpfc_vport *vport;/* virtual port pointer */
81 	void *context1;		/* caller context information */
82 	void *context2;		/* caller context information */
83 	void *context3;		/* caller context information */
84 	union {
85 		wait_queue_head_t    *wait_queue;
86 		struct lpfc_iocbq    *rsp_iocb;
87 		struct lpfcMboxq     *mbox;
88 		struct lpfc_nodelist *ndlp;
89 		struct lpfc_node_rrq *rrq;
90 	} context_un;
91 
92 	void (*fabric_iocb_cmpl) (struct lpfc_hba *, struct lpfc_iocbq *,
93 			   struct lpfc_iocbq *);
94 	void (*iocb_cmpl) (struct lpfc_hba *, struct lpfc_iocbq *,
95 			   struct lpfc_iocbq *);
96 };
97 
98 #define SLI_IOCB_RET_IOCB      1	/* Return IOCB if cmd ring full */
99 
100 #define IOCB_SUCCESS        0
101 #define IOCB_BUSY           1
102 #define IOCB_ERROR          2
103 #define IOCB_TIMEDOUT       3
104 
105 #define LPFC_MBX_WAKE		1
106 #define LPFC_MBX_IMED_UNREG	2
107 
108 typedef struct lpfcMboxq {
109 	/* MBOXQs are used in single linked lists */
110 	struct list_head list;	/* ptr to next mailbox command */
111 	union {
112 		MAILBOX_t mb;		/* Mailbox cmd */
113 		struct lpfc_mqe mqe;
114 	} u;
115 	struct lpfc_vport *vport;/* virtual port pointer */
116 	void *context1;		/* caller context information */
117 	void *context2;		/* caller context information */
118 
119 	void (*mbox_cmpl) (struct lpfc_hba *, struct lpfcMboxq *);
120 	uint8_t mbox_flag;
121 	uint16_t in_ext_byte_len;
122 	uint16_t out_ext_byte_len;
123 	uint8_t  mbox_offset_word;
124 	struct lpfc_mcqe mcqe;
125 	struct lpfc_mbx_nembed_sge_virt *sge_array;
126 } LPFC_MBOXQ_t;
127 
128 #define MBX_POLL        1	/* poll mailbox till command done, then
129 				   return */
130 #define MBX_NOWAIT      2	/* issue command then return immediately */
131 
132 #define LPFC_MAX_RING_MASK  5	/* max num of rctl/type masks allowed per
133 				   ring */
134 #define LPFC_MAX_RING       4	/* max num of SLI rings used by driver */
135 
136 struct lpfc_sli_ring;
137 
138 struct lpfc_sli_ring_mask {
139 	uint8_t profile;	/* profile associated with ring */
140 	uint8_t rctl;	/* rctl / type pair configured for ring */
141 	uint8_t type;	/* rctl / type pair configured for ring */
142 	uint8_t rsvd;
143 	/* rcv'd unsol event */
144 	void (*lpfc_sli_rcv_unsol_event) (struct lpfc_hba *,
145 					 struct lpfc_sli_ring *,
146 					 struct lpfc_iocbq *);
147 };
148 
149 
150 /* Structure used to hold SLI statistical counters and info */
151 struct lpfc_sli_ring_stat {
152 	uint64_t iocb_event;	 /* IOCB event counters */
153 	uint64_t iocb_cmd;	 /* IOCB cmd issued */
154 	uint64_t iocb_rsp;	 /* IOCB rsp received */
155 	uint64_t iocb_cmd_delay; /* IOCB cmd ring delay */
156 	uint64_t iocb_cmd_full;	 /* IOCB cmd ring full */
157 	uint64_t iocb_cmd_empty; /* IOCB cmd ring is now empty */
158 	uint64_t iocb_rsp_full;	 /* IOCB rsp ring full */
159 };
160 
161 /* Structure used to hold SLI ring information */
162 struct lpfc_sli_ring {
163 	uint16_t flag;		/* ring flags */
164 #define LPFC_DEFERRED_RING_EVENT 0x001	/* Deferred processing a ring event */
165 #define LPFC_CALL_RING_AVAILABLE 0x002	/* indicates cmd was full */
166 #define LPFC_STOP_IOCB_EVENT     0x020	/* Stop processing IOCB cmds event */
167 	uint16_t abtsiotag;	/* tracks next iotag to use for ABTS */
168 
169 	uint32_t local_getidx;   /* last available cmd index (from cmdGetInx) */
170 	uint32_t next_cmdidx;    /* next_cmd index */
171 	uint32_t rspidx;	/* current index in response ring */
172 	uint32_t cmdidx;	/* current index in command ring */
173 	uint8_t rsvd;
174 	uint8_t ringno;		/* ring number */
175 	uint16_t numCiocb;	/* number of command iocb's per ring */
176 	uint16_t numRiocb;	/* number of rsp iocb's per ring */
177 	uint16_t sizeCiocb;	/* Size of command iocb's in this ring */
178 	uint16_t sizeRiocb;	/* Size of response iocb's in this ring */
179 
180 	uint32_t fast_iotag;	/* max fastlookup based iotag           */
181 	uint32_t iotag_ctr;	/* keeps track of the next iotag to use */
182 	uint32_t iotag_max;	/* max iotag value to use               */
183 	struct list_head txq;
184 	uint16_t txq_cnt;	/* current length of queue */
185 	uint16_t txq_max;	/* max length */
186 	struct list_head txcmplq;
187 	uint16_t txcmplq_cnt;	/* current length of queue */
188 	uint16_t txcmplq_max;	/* max length */
189 	uint32_t *cmdringaddr;	/* virtual address for cmd rings */
190 	uint32_t *rspringaddr;	/* virtual address for rsp rings */
191 	uint32_t missbufcnt;	/* keep track of buffers to post */
192 	struct list_head postbufq;
193 	uint16_t postbufq_cnt;	/* current length of queue */
194 	uint16_t postbufq_max;	/* max length */
195 	struct list_head iocb_continueq;
196 	uint16_t iocb_continueq_cnt;	/* current length of queue */
197 	uint16_t iocb_continueq_max;	/* max length */
198 	struct list_head iocb_continue_saveq;
199 
200 	struct lpfc_sli_ring_mask prt[LPFC_MAX_RING_MASK];
201 	uint32_t num_mask;	/* number of mask entries in prt array */
202 	void (*lpfc_sli_rcv_async_status) (struct lpfc_hba *,
203 		struct lpfc_sli_ring *, struct lpfc_iocbq *);
204 
205 	struct lpfc_sli_ring_stat stats;	/* SLI statistical info */
206 
207 	/* cmd ring available */
208 	void (*lpfc_sli_cmd_available) (struct lpfc_hba *,
209 					struct lpfc_sli_ring *);
210 };
211 
212 /* Structure used for configuring rings to a specific profile or rctl / type */
213 struct lpfc_hbq_init {
214 	uint32_t rn;		/* Receive buffer notification */
215 	uint32_t entry_count;	/* max # of entries in HBQ */
216 	uint32_t headerLen;	/* 0 if not profile 4 or 5 */
217 	uint32_t logEntry;	/* Set to 1 if this HBQ used for LogEntry */
218 	uint32_t profile;	/* Selection profile 0=all, 7=logentry */
219 	uint32_t ring_mask;	/* Binds HBQ to a ring e.g. Ring0=b0001,
220 				 * ring2=b0100 */
221 	uint32_t hbq_index;	/* index of this hbq in ring .HBQs[] */
222 
223 	uint32_t seqlenoff;
224 	uint32_t maxlen;
225 	uint32_t seqlenbcnt;
226 	uint32_t cmdcodeoff;
227 	uint32_t cmdmatch[8];
228 	uint32_t mask_count;	/* number of mask entries in prt array */
229 	struct hbq_mask hbqMasks[6];
230 
231 	/* Non-config rings fields to keep track of buffer allocations */
232 	uint32_t buffer_count;	/* number of buffers allocated */
233 	uint32_t init_count;	/* number to allocate when initialized */
234 	uint32_t add_count;	/* number to allocate when starved */
235 } ;
236 
237 /* Structure used to hold SLI statistical counters and info */
238 struct lpfc_sli_stat {
239 	uint64_t mbox_stat_err;  /* Mbox cmds completed status error */
240 	uint64_t mbox_cmd;       /* Mailbox commands issued */
241 	uint64_t sli_intr;       /* Count of Host Attention interrupts */
242 	uint32_t err_attn_event; /* Error Attn event counters */
243 	uint32_t link_event;     /* Link event counters */
244 	uint32_t mbox_event;     /* Mailbox event counters */
245 	uint32_t mbox_busy;	 /* Mailbox cmd busy */
246 };
247 
248 /* Structure to store link status values when port stats are reset */
249 struct lpfc_lnk_stat {
250 	uint32_t link_failure_count;
251 	uint32_t loss_of_sync_count;
252 	uint32_t loss_of_signal_count;
253 	uint32_t prim_seq_protocol_err_count;
254 	uint32_t invalid_tx_word_count;
255 	uint32_t invalid_crc_count;
256 	uint32_t error_frames;
257 	uint32_t link_events;
258 };
259 
260 /* Structure used to hold SLI information */
261 struct lpfc_sli {
262 	uint32_t num_rings;
263 	uint32_t sli_flag;
264 
265 	/* Additional sli_flags */
266 #define LPFC_SLI_MBOX_ACTIVE      0x100	/* HBA mailbox is currently active */
267 #define LPFC_SLI_ACTIVE           0x200	/* SLI in firmware is active */
268 #define LPFC_PROCESS_LA           0x400	/* Able to process link attention */
269 #define LPFC_BLOCK_MGMT_IO        0x800	/* Don't allow mgmt mbx or iocb cmds */
270 #define LPFC_MENLO_MAINT          0x1000 /* need for menl fw download */
271 #define LPFC_SLI_ASYNC_MBX_BLK    0x2000 /* Async mailbox is blocked */
272 
273 	struct lpfc_sli_ring ring[LPFC_MAX_RING];
274 	int fcp_ring;		/* ring used for FCP initiator commands */
275 	int next_ring;
276 
277 	int extra_ring;		/* extra ring used for other protocols */
278 
279 	struct lpfc_sli_stat slistat;	/* SLI statistical info */
280 	struct list_head mboxq;
281 	uint16_t mboxq_cnt;	/* current length of queue */
282 	uint16_t mboxq_max;	/* max length */
283 	LPFC_MBOXQ_t *mbox_active;	/* active mboxq information */
284 	struct list_head mboxq_cmpl;
285 
286 	struct timer_list mbox_tmo;	/* Hold clk to timeout active mbox
287 					   cmd */
288 
289 #define LPFC_IOCBQ_LOOKUP_INCREMENT  1024
290 	struct lpfc_iocbq ** iocbq_lookup; /* array to lookup IOCB by IOTAG */
291 	size_t iocbq_lookup_len;           /* current lengs of the array */
292 	uint16_t  last_iotag;              /* last allocated IOTAG */
293 	unsigned long  stats_start;        /* in seconds */
294 	struct lpfc_lnk_stat lnk_stat_offsets;
295 };
296 
297 /* Timeout for normal outstanding mbox command (Seconds) */
298 #define LPFC_MBOX_TMO				30
299 /* Timeout for non-flash-based outstanding sli_config mbox command (Seconds) */
300 #define LPFC_MBOX_SLI4_CONFIG_TMO		60
301 /* Timeout for flash-based outstanding sli_config mbox command (Seconds) */
302 #define LPFC_MBOX_SLI4_CONFIG_EXTENDED_TMO	300
303 /* Timeout for other flash-based outstanding mbox command (Seconds) */
304 #define LPFC_MBOX_TMO_FLASH_CMD			300
305