Commit | Line | Data |
---|---|---|
41fa2ada | 1 | /* |
553448f6 | 2 | * zfcp device driver |
1da177e4 | 3 | * |
553448f6 | 4 | * Global definitions for the zfcp device driver. |
41fa2ada | 5 | * |
553448f6 | 6 | * Copyright IBM Corporation 2002, 2008 |
41fa2ada | 7 | */ |
1da177e4 | 8 | |
1da177e4 LT |
9 | #ifndef ZFCP_DEF_H |
10 | #define ZFCP_DEF_H | |
11 | ||
1da177e4 LT |
12 | /*************************** INCLUDES *****************************************/ |
13 | ||
14 | #include <linux/init.h> | |
15 | #include <linux/moduleparam.h> | |
1da177e4 LT |
16 | #include <linux/major.h> |
17 | #include <linux/blkdev.h> | |
18 | #include <linux/delay.h> | |
19 | #include <linux/timer.h> | |
dd52e0ea HC |
20 | #include <linux/slab.h> |
21 | #include <linux/mempool.h> | |
22 | #include <linux/syscalls.h> | |
f1346372 | 23 | #include <linux/scatterlist.h> |
dd52e0ea | 24 | #include <linux/ioctl.h> |
1da177e4 LT |
25 | #include <scsi/scsi.h> |
26 | #include <scsi/scsi_tcq.h> | |
27 | #include <scsi/scsi_cmnd.h> | |
28 | #include <scsi/scsi_device.h> | |
29 | #include <scsi/scsi_host.h> | |
30 | #include <scsi/scsi_transport.h> | |
31 | #include <scsi/scsi_transport_fc.h> | |
1da177e4 LT |
32 | #include <asm/ccwdev.h> |
33 | #include <asm/qdio.h> | |
34 | #include <asm/debug.h> | |
35 | #include <asm/ebcdic.h> | |
2b604c9b | 36 | #include "zfcp_dbf.h" |
dd52e0ea | 37 | #include "zfcp_fsf.h" |
1da177e4 | 38 | |
1da177e4 LT |
39 | |
40 | /********************* GENERAL DEFINES *********************************/ | |
41 | ||
1da177e4 LT |
42 | /** |
43 | * zfcp_sg_to_address - determine kernel address from struct scatterlist | |
44 | * @list: struct scatterlist | |
45 | * Return: kernel address | |
46 | */ | |
47 | static inline void * | |
48 | zfcp_sg_to_address(struct scatterlist *list) | |
49 | { | |
73fc4f0d | 50 | return sg_virt(list); |
1da177e4 LT |
51 | } |
52 | ||
53 | /** | |
54 | * zfcp_address_to_sg - set up struct scatterlist from kernel address | |
55 | * @address: kernel address | |
56 | * @list: struct scatterlist | |
93354329 | 57 | * @size: buffer size |
1da177e4 LT |
58 | */ |
59 | static inline void | |
93354329 | 60 | zfcp_address_to_sg(void *address, struct scatterlist *list, unsigned int size) |
1da177e4 | 61 | { |
93354329 | 62 | sg_set_buf(list, address, size); |
1da177e4 LT |
63 | } |
64 | ||
06506d00 | 65 | #define REQUEST_LIST_SIZE 128 |
1da177e4 | 66 | |
06506d00 | 67 | /********************* SCSI SPECIFIC DEFINES *********************************/ |
f6c0e7a7 | 68 | #define ZFCP_SCSI_ER_TIMEOUT (10*HZ) |
1da177e4 LT |
69 | |
70 | /********************* CIO/QDIO SPECIFIC DEFINES *****************************/ | |
71 | ||
72 | /* Adapter Identification Parameters */ | |
73 | #define ZFCP_CONTROL_UNIT_TYPE 0x1731 | |
74 | #define ZFCP_CONTROL_UNIT_MODEL 0x03 | |
75 | #define ZFCP_DEVICE_TYPE 0x1732 | |
76 | #define ZFCP_DEVICE_MODEL 0x03 | |
77 | #define ZFCP_DEVICE_MODEL_PRIV 0x04 | |
41fa2ada | 78 | |
1da177e4 LT |
79 | /* DMQ bug workaround: don't use last SBALE */ |
80 | #define ZFCP_MAX_SBALES_PER_SBAL (QDIO_MAX_ELEMENTS_PER_BUFFER - 1) | |
81 | ||
82 | /* index of last SBALE (with respect to DMQ bug workaround) */ | |
83 | #define ZFCP_LAST_SBALE_PER_SBAL (ZFCP_MAX_SBALES_PER_SBAL - 1) | |
84 | ||
85 | /* max. number of (data buffer) SBALEs in largest SBAL chain */ | |
86 | #define ZFCP_MAX_SBALES_PER_REQ \ | |
c41f8cbd | 87 | (FSF_MAX_SBALS_PER_REQ * ZFCP_MAX_SBALES_PER_SBAL - 2) |
1da177e4 LT |
88 | /* request ID + QTCB in SBALE 0 + 1 of first SBAL in chain */ |
89 | ||
8d1a0060 SS |
90 | #define ZFCP_MAX_SECTORS (ZFCP_MAX_SBALES_PER_REQ * 8) |
91 | /* max. number of (data buffer) SBALEs in largest SBAL chain | |
92 | multiplied with number of sectors per 4k block */ | |
93 | ||
18edcdbd | 94 | #define ZFCP_TYPE2_RECOVERY_TIME 8 /* seconds */ |
1da177e4 | 95 | |
1da177e4 LT |
96 | /********************* FSF SPECIFIC DEFINES *********************************/ |
97 | ||
1da177e4 LT |
98 | /* ATTENTION: value must not be used by hardware */ |
99 | #define FSF_QTCB_UNSOLICITED_STATUS 0x6305 | |
22753fa5 AH |
100 | |
101 | /* Do 1st retry in 1 second, then double the timeout for each following retry */ | |
18edcdbd | 102 | #define ZFCP_EXCHANGE_CONFIG_DATA_FIRST_SLEEP 1 |
22753fa5 | 103 | #define ZFCP_EXCHANGE_CONFIG_DATA_RETRIES 7 |
1da177e4 LT |
104 | |
105 | /* timeout value for "default timer" for fsf requests */ | |
2abbe866 | 106 | #define ZFCP_FSF_REQUEST_TIMEOUT (60*HZ) |
1da177e4 LT |
107 | |
108 | /*************** FIBRE CHANNEL PROTOCOL SPECIFIC DEFINES ********************/ | |
109 | ||
110 | typedef unsigned long long wwn_t; | |
1da177e4 LT |
111 | typedef unsigned long long fcp_lun_t; |
112 | /* data length field may be at variable position in FCP-2 FCP_CMND IU */ | |
113 | typedef unsigned int fcp_dl_t; | |
114 | ||
1da177e4 LT |
115 | /* timeout for name-server lookup (in seconds) */ |
116 | #define ZFCP_NS_GID_PN_TIMEOUT 10 | |
117 | ||
1da177e4 LT |
118 | /* task attribute values in FCP-2 FCP_CMND IU */ |
119 | #define SIMPLE_Q 0 | |
120 | #define HEAD_OF_Q 1 | |
121 | #define ORDERED_Q 2 | |
122 | #define ACA_Q 4 | |
123 | #define UNTAGGED 5 | |
124 | ||
125 | /* task management flags in FCP-2 FCP_CMND IU */ | |
126 | #define FCP_CLEAR_ACA 0x40 | |
127 | #define FCP_TARGET_RESET 0x20 | |
128 | #define FCP_LOGICAL_UNIT_RESET 0x10 | |
129 | #define FCP_CLEAR_TASK_SET 0x04 | |
130 | #define FCP_ABORT_TASK_SET 0x02 | |
131 | ||
132 | #define FCP_CDB_LENGTH 16 | |
133 | ||
134 | #define ZFCP_DID_MASK 0x00FFFFFF | |
135 | ||
136 | /* FCP(-2) FCP_CMND IU */ | |
137 | struct fcp_cmnd_iu { | |
138 | fcp_lun_t fcp_lun; /* FCP logical unit number */ | |
139 | u8 crn; /* command reference number */ | |
140 | u8 reserved0:5; /* reserved */ | |
141 | u8 task_attribute:3; /* task attribute */ | |
142 | u8 task_management_flags; /* task management flags */ | |
143 | u8 add_fcp_cdb_length:6; /* additional FCP_CDB length */ | |
144 | u8 rddata:1; /* read data */ | |
145 | u8 wddata:1; /* write data */ | |
146 | u8 fcp_cdb[FCP_CDB_LENGTH]; | |
147 | } __attribute__((packed)); | |
148 | ||
149 | /* FCP(-2) FCP_RSP IU */ | |
150 | struct fcp_rsp_iu { | |
151 | u8 reserved0[10]; | |
152 | union { | |
153 | struct { | |
154 | u8 reserved1:3; | |
155 | u8 fcp_conf_req:1; | |
156 | u8 fcp_resid_under:1; | |
157 | u8 fcp_resid_over:1; | |
158 | u8 fcp_sns_len_valid:1; | |
159 | u8 fcp_rsp_len_valid:1; | |
160 | } bits; | |
161 | u8 value; | |
162 | } validity; | |
163 | u8 scsi_status; | |
164 | u32 fcp_resid; | |
165 | u32 fcp_sns_len; | |
166 | u32 fcp_rsp_len; | |
167 | } __attribute__((packed)); | |
168 | ||
169 | ||
170 | #define RSP_CODE_GOOD 0 | |
171 | #define RSP_CODE_LENGTH_MISMATCH 1 | |
172 | #define RSP_CODE_FIELD_INVALID 2 | |
173 | #define RSP_CODE_RO_MISMATCH 3 | |
174 | #define RSP_CODE_TASKMAN_UNSUPP 4 | |
175 | #define RSP_CODE_TASKMAN_FAILED 5 | |
176 | ||
177 | /* see fc-fs */ | |
24073b47 CS |
178 | #define LS_RSCN 0x61 |
179 | #define LS_LOGO 0x05 | |
180 | #define LS_PLOGI 0x03 | |
1da177e4 LT |
181 | |
182 | struct fcp_rscn_head { | |
183 | u8 command; | |
184 | u8 page_length; /* always 0x04 */ | |
185 | u16 payload_len; | |
186 | } __attribute__((packed)); | |
187 | ||
188 | struct fcp_rscn_element { | |
189 | u8 reserved:2; | |
190 | u8 event_qual:4; | |
191 | u8 addr_format:2; | |
192 | u32 nport_did:24; | |
193 | } __attribute__((packed)); | |
194 | ||
195 | #define ZFCP_PORT_ADDRESS 0x0 | |
196 | #define ZFCP_AREA_ADDRESS 0x1 | |
197 | #define ZFCP_DOMAIN_ADDRESS 0x2 | |
198 | #define ZFCP_FABRIC_ADDRESS 0x3 | |
199 | ||
200 | #define ZFCP_PORTS_RANGE_PORT 0xFFFFFF | |
201 | #define ZFCP_PORTS_RANGE_AREA 0xFFFF00 | |
202 | #define ZFCP_PORTS_RANGE_DOMAIN 0xFF0000 | |
203 | #define ZFCP_PORTS_RANGE_FABRIC 0x000000 | |
204 | ||
205 | #define ZFCP_NO_PORTS_PER_AREA 0x100 | |
206 | #define ZFCP_NO_PORTS_PER_DOMAIN 0x10000 | |
207 | #define ZFCP_NO_PORTS_PER_FABRIC 0x1000000 | |
208 | ||
1da177e4 LT |
209 | /* see fc-ph */ |
210 | struct fcp_logo { | |
211 | u32 command; | |
212 | u32 nport_did; | |
213 | wwn_t nport_wwpn; | |
214 | } __attribute__((packed)); | |
215 | ||
216 | /* | |
217 | * FC-FS stuff | |
218 | */ | |
219 | #define R_A_TOV 10 /* seconds */ | |
1da177e4 LT |
220 | |
221 | #define ZFCP_LS_RLS 0x0f | |
222 | #define ZFCP_LS_ADISC 0x52 | |
223 | #define ZFCP_LS_RPS 0x56 | |
224 | #define ZFCP_LS_RSCN 0x61 | |
225 | #define ZFCP_LS_RNID 0x78 | |
226 | ||
227 | struct zfcp_ls_rjt_par { | |
228 | u8 action; | |
229 | u8 reason_code; | |
230 | u8 reason_expl; | |
231 | u8 vendor_unique; | |
232 | } __attribute__ ((packed)); | |
233 | ||
234 | struct zfcp_ls_adisc { | |
235 | u8 code; | |
236 | u8 field[3]; | |
237 | u32 hard_nport_id; | |
238 | u64 wwpn; | |
239 | u64 wwnn; | |
240 | u32 nport_id; | |
241 | } __attribute__ ((packed)); | |
242 | ||
243 | struct zfcp_ls_adisc_acc { | |
244 | u8 code; | |
245 | u8 field[3]; | |
246 | u32 hard_nport_id; | |
247 | u64 wwpn; | |
248 | u64 wwnn; | |
249 | u32 nport_id; | |
250 | } __attribute__ ((packed)); | |
251 | ||
252 | struct zfcp_rc_entry { | |
253 | u8 code; | |
254 | const char *description; | |
255 | }; | |
256 | ||
257 | /* | |
258 | * FC-GS-2 stuff | |
259 | */ | |
260 | #define ZFCP_CT_REVISION 0x01 | |
261 | #define ZFCP_CT_DIRECTORY_SERVICE 0xFC | |
262 | #define ZFCP_CT_NAME_SERVER 0x02 | |
263 | #define ZFCP_CT_SYNCHRONOUS 0x00 | |
cc8c2829 SS |
264 | #define ZFCP_CT_SCSI_FCP 0x08 |
265 | #define ZFCP_CT_UNABLE_TO_PERFORM_CMD 0x09 | |
1da177e4 | 266 | #define ZFCP_CT_GID_PN 0x0121 |
cc8c2829 | 267 | #define ZFCP_CT_GPN_FT 0x0172 |
1da177e4 LT |
268 | #define ZFCP_CT_MAX_SIZE 0x1020 |
269 | #define ZFCP_CT_ACCEPT 0x8002 | |
270 | #define ZFCP_CT_REJECT 0x8001 | |
271 | ||
272 | /* | |
273 | * FC-GS-4 stuff | |
274 | */ | |
275 | #define ZFCP_CT_TIMEOUT (3 * R_A_TOV) | |
276 | ||
1da177e4 LT |
277 | /*************** ADAPTER/PORT/UNIT AND FSF_REQ STATUS FLAGS ******************/ |
278 | ||
41fa2ada SS |
279 | /* |
280 | * Note, the leftmost status byte is common among adapter, port | |
1da177e4 LT |
281 | * and unit |
282 | */ | |
283 | #define ZFCP_COMMON_FLAGS 0xfff00000 | |
1da177e4 LT |
284 | |
285 | /* common status bits */ | |
286 | #define ZFCP_STATUS_COMMON_REMOVE 0x80000000 | |
287 | #define ZFCP_STATUS_COMMON_RUNNING 0x40000000 | |
288 | #define ZFCP_STATUS_COMMON_ERP_FAILED 0x20000000 | |
289 | #define ZFCP_STATUS_COMMON_UNBLOCKED 0x10000000 | |
290 | #define ZFCP_STATUS_COMMON_OPENING 0x08000000 | |
291 | #define ZFCP_STATUS_COMMON_OPEN 0x04000000 | |
292 | #define ZFCP_STATUS_COMMON_CLOSING 0x02000000 | |
293 | #define ZFCP_STATUS_COMMON_ERP_INUSE 0x01000000 | |
294 | #define ZFCP_STATUS_COMMON_ACCESS_DENIED 0x00800000 | |
d736a27b | 295 | #define ZFCP_STATUS_COMMON_ACCESS_BOXED 0x00400000 |
cc8c2829 | 296 | #define ZFCP_STATUS_COMMON_NOESC 0x00200000 |
1da177e4 LT |
297 | |
298 | /* adapter status */ | |
299 | #define ZFCP_STATUS_ADAPTER_QDIOUP 0x00000002 | |
300 | #define ZFCP_STATUS_ADAPTER_REGISTERED 0x00000004 | |
301 | #define ZFCP_STATUS_ADAPTER_XCONFIG_OK 0x00000008 | |
302 | #define ZFCP_STATUS_ADAPTER_HOST_CON_INIT 0x00000010 | |
303 | #define ZFCP_STATUS_ADAPTER_ERP_THREAD_UP 0x00000020 | |
304 | #define ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL 0x00000080 | |
305 | #define ZFCP_STATUS_ADAPTER_ERP_PENDING 0x00000100 | |
306 | #define ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED 0x00000200 | |
aef4a983 | 307 | #define ZFCP_STATUS_ADAPTER_XPORT_OK 0x00000800 |
1da177e4 | 308 | |
1da177e4 LT |
309 | /* FC-PH/FC-GS well-known address identifiers for generic services */ |
310 | #define ZFCP_DID_MANAGEMENT_SERVICE 0xFFFFFA | |
311 | #define ZFCP_DID_TIME_SERVICE 0xFFFFFB | |
312 | #define ZFCP_DID_DIRECTORY_SERVICE 0xFFFFFC | |
313 | #define ZFCP_DID_ALIAS_SERVICE 0xFFFFF8 | |
314 | #define ZFCP_DID_KEY_DISTRIBUTION_SERVICE 0xFFFFF7 | |
315 | ||
316 | /* remote port status */ | |
317 | #define ZFCP_STATUS_PORT_PHYS_OPEN 0x00000001 | |
318 | #define ZFCP_STATUS_PORT_DID_DID 0x00000002 | |
319 | #define ZFCP_STATUS_PORT_PHYS_CLOSING 0x00000004 | |
320 | #define ZFCP_STATUS_PORT_NO_WWPN 0x00000008 | |
321 | #define ZFCP_STATUS_PORT_NO_SCSI_ID 0x00000010 | |
322 | #define ZFCP_STATUS_PORT_INVALID_WWPN 0x00000020 | |
1da177e4 LT |
323 | |
324 | /* for ports with well known addresses */ | |
325 | #define ZFCP_STATUS_PORT_WKA \ | |
326 | (ZFCP_STATUS_PORT_NO_WWPN | \ | |
327 | ZFCP_STATUS_PORT_NO_SCSI_ID) | |
328 | ||
329 | /* logical unit status */ | |
1da177e4 LT |
330 | #define ZFCP_STATUS_UNIT_TEMPORARY 0x00000002 |
331 | #define ZFCP_STATUS_UNIT_SHARED 0x00000004 | |
332 | #define ZFCP_STATUS_UNIT_READONLY 0x00000008 | |
ad58f7db | 333 | #define ZFCP_STATUS_UNIT_REGISTERED 0x00000010 |
5f852be9 | 334 | #define ZFCP_STATUS_UNIT_SCSI_WORK_PENDING 0x00000020 |
1da177e4 LT |
335 | |
336 | /* FSF request status (this does not have a common part) */ | |
337 | #define ZFCP_STATUS_FSFREQ_NOT_INIT 0x00000000 | |
338 | #define ZFCP_STATUS_FSFREQ_POOL 0x00000001 | |
339 | #define ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT 0x00000002 | |
340 | #define ZFCP_STATUS_FSFREQ_COMPLETED 0x00000004 | |
341 | #define ZFCP_STATUS_FSFREQ_ERROR 0x00000008 | |
342 | #define ZFCP_STATUS_FSFREQ_CLEANUP 0x00000010 | |
343 | #define ZFCP_STATUS_FSFREQ_ABORTING 0x00000020 | |
344 | #define ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED 0x00000040 | |
345 | #define ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED 0x00000080 | |
346 | #define ZFCP_STATUS_FSFREQ_ABORTED 0x00000100 | |
347 | #define ZFCP_STATUS_FSFREQ_TMFUNCFAILED 0x00000200 | |
348 | #define ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP 0x00000400 | |
349 | #define ZFCP_STATUS_FSFREQ_RETRY 0x00000800 | |
350 | #define ZFCP_STATUS_FSFREQ_DISMISSED 0x00001000 | |
351 | ||
352 | /*********************** ERROR RECOVERY PROCEDURE DEFINES ********************/ | |
353 | ||
354 | #define ZFCP_MAX_ERPS 3 | |
355 | ||
356 | #define ZFCP_ERP_FSFREQ_TIMEOUT (30 * HZ) | |
357 | #define ZFCP_ERP_MEMWAIT_TIMEOUT HZ | |
358 | ||
359 | #define ZFCP_STATUS_ERP_TIMEDOUT 0x10000000 | |
360 | #define ZFCP_STATUS_ERP_CLOSE_ONLY 0x01000000 | |
361 | #define ZFCP_STATUS_ERP_DISMISSING 0x00100000 | |
362 | #define ZFCP_STATUS_ERP_DISMISSED 0x00200000 | |
363 | #define ZFCP_STATUS_ERP_LOWMEM 0x00400000 | |
364 | ||
365 | #define ZFCP_ERP_STEP_UNINITIALIZED 0x00000000 | |
366 | #define ZFCP_ERP_STEP_FSF_XCONFIG 0x00000001 | |
367 | #define ZFCP_ERP_STEP_PHYS_PORT_CLOSING 0x00000010 | |
368 | #define ZFCP_ERP_STEP_PORT_CLOSING 0x00000100 | |
369 | #define ZFCP_ERP_STEP_NAMESERVER_OPEN 0x00000200 | |
370 | #define ZFCP_ERP_STEP_NAMESERVER_LOOKUP 0x00000400 | |
371 | #define ZFCP_ERP_STEP_PORT_OPENING 0x00000800 | |
372 | #define ZFCP_ERP_STEP_UNIT_CLOSING 0x00001000 | |
373 | #define ZFCP_ERP_STEP_UNIT_OPENING 0x00002000 | |
374 | ||
375 | /* Ordered by escalation level (necessary for proper erp-code operation) */ | |
376 | #define ZFCP_ERP_ACTION_REOPEN_ADAPTER 0x4 | |
377 | #define ZFCP_ERP_ACTION_REOPEN_PORT_FORCED 0x3 | |
378 | #define ZFCP_ERP_ACTION_REOPEN_PORT 0x2 | |
379 | #define ZFCP_ERP_ACTION_REOPEN_UNIT 0x1 | |
380 | ||
381 | #define ZFCP_ERP_ACTION_RUNNING 0x1 | |
382 | #define ZFCP_ERP_ACTION_READY 0x2 | |
383 | ||
384 | #define ZFCP_ERP_SUCCEEDED 0x0 | |
385 | #define ZFCP_ERP_FAILED 0x1 | |
386 | #define ZFCP_ERP_CONTINUES 0x2 | |
387 | #define ZFCP_ERP_EXIT 0x3 | |
388 | #define ZFCP_ERP_DISMISSED 0x4 | |
389 | #define ZFCP_ERP_NOMEM 0x5 | |
390 | ||
1da177e4 LT |
391 | /************************* STRUCTURE DEFINITIONS *****************************/ |
392 | ||
393 | struct zfcp_fsf_req; | |
394 | ||
395 | /* holds various memory pools of an adapter */ | |
396 | struct zfcp_adapter_mempool { | |
397 | mempool_t *fsf_req_erp; | |
398 | mempool_t *fsf_req_scsi; | |
399 | mempool_t *fsf_req_abort; | |
400 | mempool_t *fsf_req_status_read; | |
401 | mempool_t *data_status_read; | |
402 | mempool_t *data_gid_pn; | |
403 | }; | |
404 | ||
1da177e4 LT |
405 | /* |
406 | * header for CT_IU | |
407 | */ | |
408 | struct ct_hdr { | |
409 | u8 revision; // 0x01 | |
410 | u8 in_id[3]; // 0x00 | |
411 | u8 gs_type; // 0xFC Directory Service | |
412 | u8 gs_subtype; // 0x02 Name Server | |
413 | u8 options; // 0x00 single bidirectional exchange | |
414 | u8 reserved0; | |
415 | u16 cmd_rsp_code; // 0x0121 GID_PN, or 0x0100 GA_NXT | |
416 | u16 max_res_size; // <= (4096 - 16) / 4 | |
417 | u8 reserved1; | |
418 | u8 reason_code; | |
419 | u8 reason_code_expl; | |
420 | u8 vendor_unique; | |
421 | } __attribute__ ((packed)); | |
422 | ||
423 | /* nameserver request CT_IU -- for requests where | |
424 | * a port name is required */ | |
425 | struct ct_iu_gid_pn_req { | |
426 | struct ct_hdr header; | |
427 | wwn_t wwpn; | |
428 | } __attribute__ ((packed)); | |
429 | ||
430 | /* FS_ACC IU and data unit for GID_PN nameserver request */ | |
431 | struct ct_iu_gid_pn_resp { | |
432 | struct ct_hdr header; | |
13e1e1f0 | 433 | u32 d_id; |
1da177e4 LT |
434 | } __attribute__ ((packed)); |
435 | ||
436 | typedef void (*zfcp_send_ct_handler_t)(unsigned long); | |
437 | ||
438 | /** | |
439 | * struct zfcp_send_ct - used to pass parameters to function zfcp_fsf_send_ct | |
440 | * @port: port where the request is sent to | |
441 | * @req: scatter-gather list for request | |
442 | * @resp: scatter-gather list for response | |
443 | * @req_count: number of elements in request scatter-gather list | |
444 | * @resp_count: number of elements in response scatter-gather list | |
445 | * @handler: handler function (called for response to the request) | |
446 | * @handler_data: data passed to handler function | |
1da177e4 | 447 | * @timeout: FSF timeout for this request |
1da177e4 LT |
448 | * @completion: completion for synchronization purposes |
449 | * @status: used to pass error status to calling function | |
450 | */ | |
451 | struct zfcp_send_ct { | |
452 | struct zfcp_port *port; | |
453 | struct scatterlist *req; | |
454 | struct scatterlist *resp; | |
455 | unsigned int req_count; | |
456 | unsigned int resp_count; | |
457 | zfcp_send_ct_handler_t handler; | |
458 | unsigned long handler_data; | |
1da177e4 | 459 | int timeout; |
1da177e4 LT |
460 | struct completion *completion; |
461 | int status; | |
462 | }; | |
463 | ||
464 | /* used for name server requests in error recovery */ | |
465 | struct zfcp_gid_pn_data { | |
466 | struct zfcp_send_ct ct; | |
467 | struct scatterlist req; | |
468 | struct scatterlist resp; | |
469 | struct ct_iu_gid_pn_req ct_iu_req; | |
470 | struct ct_iu_gid_pn_resp ct_iu_resp; | |
471 | struct zfcp_port *port; | |
472 | }; | |
473 | ||
474 | typedef void (*zfcp_send_els_handler_t)(unsigned long); | |
475 | ||
476 | /** | |
477 | * struct zfcp_send_els - used to pass parameters to function zfcp_fsf_send_els | |
478 | * @adapter: adapter where request is sent from | |
64b29a13 | 479 | * @port: port where ELS is destinated (port reference count has to be increased) |
1da177e4 LT |
480 | * @d_id: destiniation id of port where request is sent to |
481 | * @req: scatter-gather list for request | |
482 | * @resp: scatter-gather list for response | |
483 | * @req_count: number of elements in request scatter-gather list | |
484 | * @resp_count: number of elements in response scatter-gather list | |
485 | * @handler: handler function (called for response to the request) | |
486 | * @handler_data: data passed to handler function | |
1da177e4 LT |
487 | * @completion: completion for synchronization purposes |
488 | * @ls_code: hex code of ELS command | |
489 | * @status: used to pass error status to calling function | |
490 | */ | |
491 | struct zfcp_send_els { | |
492 | struct zfcp_adapter *adapter; | |
64b29a13 | 493 | struct zfcp_port *port; |
13e1e1f0 | 494 | u32 d_id; |
1da177e4 LT |
495 | struct scatterlist *req; |
496 | struct scatterlist *resp; | |
497 | unsigned int req_count; | |
498 | unsigned int resp_count; | |
499 | zfcp_send_els_handler_t handler; | |
500 | unsigned long handler_data; | |
1da177e4 LT |
501 | struct completion *completion; |
502 | int ls_code; | |
503 | int status; | |
504 | }; | |
505 | ||
1da177e4 | 506 | struct zfcp_qdio_queue { |
00bab910 SS |
507 | struct qdio_buffer *sbal[QDIO_MAX_BUFFERS_PER_Q]; /* SBALs */ |
508 | u8 first; /* index of next free bfr | |
1da177e4 | 509 | in queue (free_count>0) */ |
00bab910 | 510 | atomic_t count; /* number of free buffers |
1da177e4 | 511 | in queue */ |
c41f8cbd | 512 | spinlock_t lock; /* lock for operations on queue */ |
00bab910 | 513 | int pci_batch; /* SBALs since PCI indication |
1da177e4 LT |
514 | was last set */ |
515 | }; | |
516 | ||
517 | struct zfcp_erp_action { | |
518 | struct list_head list; | |
519 | int action; /* requested action code */ | |
520 | struct zfcp_adapter *adapter; /* device which should be recovered */ | |
521 | struct zfcp_port *port; | |
522 | struct zfcp_unit *unit; | |
523 | volatile u32 status; /* recovery status */ | |
524 | u32 step; /* active step of this erp action */ | |
525 | struct zfcp_fsf_req *fsf_req; /* fsf request currently pending | |
526 | for this action */ | |
527 | struct timer_list timer; | |
528 | }; | |
529 | ||
c9615858 CS |
530 | struct fsf_latency_record { |
531 | u32 min; | |
532 | u32 max; | |
533 | u64 sum; | |
534 | }; | |
535 | ||
536 | struct latency_cont { | |
537 | struct fsf_latency_record channel; | |
538 | struct fsf_latency_record fabric; | |
539 | u64 counter; | |
540 | }; | |
541 | ||
542 | struct zfcp_latencies { | |
543 | struct latency_cont read; | |
544 | struct latency_cont write; | |
545 | struct latency_cont cmd; | |
546 | spinlock_t lock; | |
547 | }; | |
1da177e4 LT |
548 | |
549 | struct zfcp_adapter { | |
550 | struct list_head list; /* list of adapters */ | |
551 | atomic_t refcount; /* reference count */ | |
552 | wait_queue_head_t remove_wq; /* can be used to wait for | |
553 | refcount drop to zero */ | |
6f71d9bc | 554 | wwn_t peer_wwnn; /* P2P peer WWNN */ |
555 | wwn_t peer_wwpn; /* P2P peer WWPN */ | |
13e1e1f0 | 556 | u32 peer_d_id; /* P2P peer D_ID */ |
1da177e4 | 557 | struct ccw_device *ccw_device; /* S/390 ccw device */ |
1da177e4 LT |
558 | u32 hydra_version; /* Hydra version */ |
559 | u32 fsf_lic_version; | |
aef4a983 MS |
560 | u32 adapter_features; /* FCP channel features */ |
561 | u32 connection_features; /* host connection features */ | |
1da177e4 | 562 | u32 hardware_version; /* of FCP channel */ |
c9615858 | 563 | u16 timer_ticks; /* time int for a tick */ |
1da177e4 | 564 | struct Scsi_Host *scsi_host; /* Pointer to mid-layer */ |
1da177e4 LT |
565 | struct list_head port_list_head; /* remote port list */ |
566 | struct list_head port_remove_lh; /* head of ports to be | |
567 | removed */ | |
568 | u32 ports; /* number of remote ports */ | |
fea9d6c7 VS |
569 | unsigned long req_no; /* unique FSF req number */ |
570 | struct list_head *req_list; /* list of pending reqs */ | |
571 | spinlock_t req_list_lock; /* request list lock */ | |
00bab910 | 572 | struct zfcp_qdio_queue req_q; /* request queue */ |
1da177e4 LT |
573 | u32 fsf_req_seq_no; /* FSF cmnd seq number */ |
574 | wait_queue_head_t request_wq; /* can be used to wait for | |
575 | more avaliable SBALs */ | |
00bab910 | 576 | struct zfcp_qdio_queue resp_q; /* response queue */ |
1da177e4 LT |
577 | rwlock_t abort_lock; /* Protects against SCSI |
578 | stack abort/command | |
579 | completion races */ | |
d26ab06e SS |
580 | atomic_t stat_miss; /* # missing status reads*/ |
581 | struct work_struct stat_work; | |
1da177e4 LT |
582 | atomic_t status; /* status of this adapter */ |
583 | struct list_head erp_ready_head; /* error recovery for this | |
584 | adapter/devices */ | |
585 | struct list_head erp_running_head; | |
586 | rwlock_t erp_lock; | |
587 | struct semaphore erp_ready_sem; | |
588 | wait_queue_head_t erp_thread_wqh; | |
589 | wait_queue_head_t erp_done_wqh; | |
590 | struct zfcp_erp_action erp_action; /* pending error recovery */ | |
591 | atomic_t erp_counter; | |
592 | u32 erp_total_count; /* total nr of enqueued erp | |
593 | actions */ | |
594 | u32 erp_low_mem_count; /* nr of erp actions waiting | |
595 | for memory */ | |
596 | struct zfcp_port *nameserver_port; /* adapter's nameserver */ | |
d79a83db | 597 | debug_info_t *rec_dbf; |
8a36e453 MS |
598 | debug_info_t *hba_dbf; |
599 | debug_info_t *san_dbf; /* debug feature areas */ | |
600 | debug_info_t *scsi_dbf; | |
d79a83db | 601 | spinlock_t rec_dbf_lock; |
8a36e453 MS |
602 | spinlock_t hba_dbf_lock; |
603 | spinlock_t san_dbf_lock; | |
604 | spinlock_t scsi_dbf_lock; | |
d79a83db | 605 | struct zfcp_rec_dbf_record rec_dbf_buf; |
8a36e453 MS |
606 | struct zfcp_hba_dbf_record hba_dbf_buf; |
607 | struct zfcp_san_dbf_record san_dbf_buf; | |
608 | struct zfcp_scsi_dbf_record scsi_dbf_buf; | |
1da177e4 LT |
609 | struct zfcp_adapter_mempool pool; /* Adapter memory pools */ |
610 | struct qdio_initialize qdio_init_data; /* for qdio_establish */ | |
611 | struct device generic_services; /* directory for WKA ports */ | |
f6cd94b1 AH |
612 | struct fc_host_statistics *fc_stats; |
613 | struct fsf_qtcb_bottom_port *stats_reset_data; | |
614 | unsigned long stats_reset; | |
cc8c2829 | 615 | struct work_struct scan_work; |
1da177e4 LT |
616 | }; |
617 | ||
1da177e4 LT |
618 | struct zfcp_port { |
619 | struct device sysfs_device; /* sysfs device */ | |
3859f6a2 | 620 | struct fc_rport *rport; /* rport of fc transport class */ |
1da177e4 LT |
621 | struct list_head list; /* list of remote ports */ |
622 | atomic_t refcount; /* reference count */ | |
623 | wait_queue_head_t remove_wq; /* can be used to wait for | |
624 | refcount drop to zero */ | |
625 | struct zfcp_adapter *adapter; /* adapter used to access port */ | |
626 | struct list_head unit_list_head; /* head of logical unit list */ | |
627 | struct list_head unit_remove_lh; /* head of luns to be removed | |
628 | list */ | |
629 | u32 units; /* # of logical units in list */ | |
630 | atomic_t status; /* status of this remote port */ | |
1da177e4 LT |
631 | wwn_t wwnn; /* WWNN if known */ |
632 | wwn_t wwpn; /* WWPN */ | |
13e1e1f0 | 633 | u32 d_id; /* D_ID */ |
1da177e4 LT |
634 | u32 handle; /* handle assigned by FSF */ |
635 | struct zfcp_erp_action erp_action; /* pending error recovery */ | |
636 | atomic_t erp_counter; | |
75bfc283 RW |
637 | u32 maxframe_size; |
638 | u32 supported_classes; | |
1da177e4 LT |
639 | }; |
640 | ||
1da177e4 LT |
641 | struct zfcp_unit { |
642 | struct device sysfs_device; /* sysfs device */ | |
643 | struct list_head list; /* list of logical units */ | |
644 | atomic_t refcount; /* reference count */ | |
645 | wait_queue_head_t remove_wq; /* can be used to wait for | |
646 | refcount drop to zero */ | |
647 | struct zfcp_port *port; /* remote port of unit */ | |
648 | atomic_t status; /* status of this logical unit */ | |
06506d00 | 649 | unsigned int scsi_lun; /* own SCSI LUN */ |
1da177e4 LT |
650 | fcp_lun_t fcp_lun; /* own FCP_LUN */ |
651 | u32 handle; /* handle assigned by FSF */ | |
652 | struct scsi_device *device; /* scsi device struct pointer */ | |
653 | struct zfcp_erp_action erp_action; /* pending error recovery */ | |
654 | atomic_t erp_counter; | |
c9615858 | 655 | struct zfcp_latencies latencies; |
1da177e4 LT |
656 | }; |
657 | ||
658 | /* FSF request */ | |
659 | struct zfcp_fsf_req { | |
660 | struct list_head list; /* list of FSF requests */ | |
fea9d6c7 | 661 | unsigned long req_id; /* unique request ID */ |
1da177e4 LT |
662 | struct zfcp_adapter *adapter; /* adapter request belongs to */ |
663 | u8 sbal_number; /* nr of SBALs free for use */ | |
664 | u8 sbal_first; /* first SBAL for this request */ | |
e891bffe | 665 | u8 sbal_last; /* last SBAL for this request */ |
d01d51be | 666 | u8 sbal_limit; /* last possible SBAL for |
1da177e4 | 667 | this reuest */ |
1da177e4 LT |
668 | u8 sbale_curr; /* current SBALE during creation |
669 | of request */ | |
c3baa9a2 | 670 | u8 sbal_response; /* SBAL used in interrupt */ |
1da177e4 LT |
671 | wait_queue_head_t completion_wq; /* can be used by a routine |
672 | to wait for completion */ | |
673 | volatile u32 status; /* status of this request */ | |
674 | u32 fsf_command; /* FSF Command copy */ | |
675 | struct fsf_qtcb *qtcb; /* address of associated QTCB */ | |
676 | u32 seq_no; /* Sequence number of request */ | |
c41f8cbd | 677 | void *data; /* private data of request */ |
41fa2ada | 678 | struct timer_list timer; /* used for erp or scsi er */ |
1da177e4 LT |
679 | struct zfcp_erp_action *erp_action; /* used if this request is |
680 | issued on behalf of erp */ | |
681 | mempool_t *pool; /* used if request was alloacted | |
682 | from emergency pool */ | |
8a36e453 | 683 | unsigned long long issued; /* request sent time (STCK) */ |
059c97d0 | 684 | struct zfcp_unit *unit; |
c41f8cbd | 685 | void (*handler)(struct zfcp_fsf_req *); |
1da177e4 LT |
686 | }; |
687 | ||
1da177e4 LT |
688 | /* driver data */ |
689 | struct zfcp_data { | |
690 | struct scsi_host_template scsi_host_template; | |
dd52e0ea | 691 | struct scsi_transport_template *scsi_transport_template; |
1da177e4 LT |
692 | atomic_t status; /* Module status flags */ |
693 | struct list_head adapter_list_head; /* head of adapter list */ | |
694 | struct list_head adapter_remove_lh; /* head of adapters to be | |
695 | removed */ | |
1da177e4 LT |
696 | u32 adapters; /* # of adapters in list */ |
697 | rwlock_t config_lock; /* serialises changes | |
698 | to adapter/port/unit | |
699 | lists */ | |
700 | struct semaphore config_sema; /* serialises configuration | |
701 | changes */ | |
702 | atomic_t loglevel; /* current loglevel */ | |
703 | char init_busid[BUS_ID_SIZE]; | |
704 | wwn_t init_wwpn; | |
705 | fcp_lun_t init_fcp_lun; | |
e18b890b CL |
706 | struct kmem_cache *fsf_req_qtcb_cache; |
707 | struct kmem_cache *sr_buffer_cache; | |
708 | struct kmem_cache *gid_pn_cache; | |
1da177e4 LT |
709 | }; |
710 | ||
1da177e4 | 711 | /* struct used by memory pools for fsf_requests */ |
dd52e0ea | 712 | struct zfcp_fsf_req_qtcb { |
1da177e4 LT |
713 | struct zfcp_fsf_req fsf_req; |
714 | struct fsf_qtcb qtcb; | |
715 | }; | |
716 | ||
717 | /********************** ZFCP SPECIFIC DEFINES ********************************/ | |
718 | ||
1da177e4 | 719 | #define ZFCP_REQ_AUTO_CLEANUP 0x00000002 |
1da177e4 LT |
720 | #define ZFCP_REQ_NO_QTCB 0x00000008 |
721 | ||
722 | #define ZFCP_SET 0x00000100 | |
723 | #define ZFCP_CLEAR 0x00000200 | |
724 | ||
1da177e4 LT |
725 | #ifndef atomic_test_mask |
726 | #define atomic_test_mask(mask, target) \ | |
727 | ((atomic_read(target) & mask) == mask) | |
728 | #endif | |
729 | ||
1da177e4 LT |
730 | #define zfcp_get_busid_by_adapter(adapter) (adapter->ccw_device->dev.bus_id) |
731 | #define zfcp_get_busid_by_port(port) (zfcp_get_busid_by_adapter(port->adapter)) | |
732 | #define zfcp_get_busid_by_unit(unit) (zfcp_get_busid_by_port(unit->port)) | |
733 | ||
ca2d02c2 HC |
734 | /* |
735 | * Helper functions for request ID management. | |
736 | */ | |
737 | static inline int zfcp_reqlist_hash(unsigned long req_id) | |
738 | { | |
739 | return req_id % REQUEST_LIST_SIZE; | |
740 | } | |
741 | ||
ca2d02c2 HC |
742 | static inline void zfcp_reqlist_remove(struct zfcp_adapter *adapter, |
743 | struct zfcp_fsf_req *fsf_req) | |
744 | { | |
745 | list_del(&fsf_req->list); | |
746 | } | |
747 | ||
748 | static inline struct zfcp_fsf_req * | |
749 | zfcp_reqlist_find(struct zfcp_adapter *adapter, unsigned long req_id) | |
750 | { | |
751 | struct zfcp_fsf_req *request; | |
752 | unsigned int idx; | |
753 | ||
754 | idx = zfcp_reqlist_hash(req_id); | |
755 | list_for_each_entry(request, &adapter->req_list[idx], list) | |
756 | if (request->req_id == req_id) | |
757 | return request; | |
758 | return NULL; | |
759 | } | |
760 | ||
d1ad09db HC |
761 | static inline struct zfcp_fsf_req * |
762 | zfcp_reqlist_find_safe(struct zfcp_adapter *adapter, struct zfcp_fsf_req *req) | |
763 | { | |
764 | struct zfcp_fsf_req *request; | |
765 | unsigned int idx; | |
766 | ||
767 | for (idx = 0; idx < REQUEST_LIST_SIZE; idx++) { | |
768 | list_for_each_entry(request, &adapter->req_list[idx], list) | |
769 | if (request == req) | |
770 | return request; | |
771 | } | |
772 | return NULL; | |
773 | } | |
774 | ||
1da177e4 LT |
775 | /* |
776 | * functions needed for reference/usage counting | |
777 | */ | |
778 | ||
779 | static inline void | |
780 | zfcp_unit_get(struct zfcp_unit *unit) | |
781 | { | |
782 | atomic_inc(&unit->refcount); | |
783 | } | |
784 | ||
785 | static inline void | |
786 | zfcp_unit_put(struct zfcp_unit *unit) | |
787 | { | |
788 | if (atomic_dec_return(&unit->refcount) == 0) | |
789 | wake_up(&unit->remove_wq); | |
790 | } | |
791 | ||
792 | static inline void | |
793 | zfcp_unit_wait(struct zfcp_unit *unit) | |
794 | { | |
795 | wait_event(unit->remove_wq, atomic_read(&unit->refcount) == 0); | |
796 | } | |
797 | ||
798 | static inline void | |
799 | zfcp_port_get(struct zfcp_port *port) | |
800 | { | |
801 | atomic_inc(&port->refcount); | |
802 | } | |
803 | ||
804 | static inline void | |
805 | zfcp_port_put(struct zfcp_port *port) | |
806 | { | |
807 | if (atomic_dec_return(&port->refcount) == 0) | |
808 | wake_up(&port->remove_wq); | |
809 | } | |
810 | ||
811 | static inline void | |
812 | zfcp_port_wait(struct zfcp_port *port) | |
813 | { | |
814 | wait_event(port->remove_wq, atomic_read(&port->refcount) == 0); | |
815 | } | |
816 | ||
817 | static inline void | |
818 | zfcp_adapter_get(struct zfcp_adapter *adapter) | |
819 | { | |
820 | atomic_inc(&adapter->refcount); | |
821 | } | |
822 | ||
823 | static inline void | |
824 | zfcp_adapter_put(struct zfcp_adapter *adapter) | |
825 | { | |
826 | if (atomic_dec_return(&adapter->refcount) == 0) | |
827 | wake_up(&adapter->remove_wq); | |
828 | } | |
829 | ||
830 | static inline void | |
831 | zfcp_adapter_wait(struct zfcp_adapter *adapter) | |
832 | { | |
833 | wait_event(adapter->remove_wq, atomic_read(&adapter->refcount) == 0); | |
834 | } | |
835 | ||
836 | #endif /* ZFCP_DEF_H */ |