xref: /openbmc/linux/drivers/scsi/ibmvscsi/ibmvfc.h (revision 8540f661)
1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  * ibmvfc.h -- driver for IBM Power Virtual Fibre Channel Adapter
4  *
5  * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation
6  *
7  * Copyright (C) IBM Corporation, 2008
8  */
9 
10 #ifndef _IBMVFC_H
11 #define _IBMVFC_H
12 
13 #include <linux/list.h>
14 #include <linux/types.h>
15 #include <scsi/viosrp.h>
16 
17 #define IBMVFC_NAME	"ibmvfc"
18 #define IBMVFC_DRIVER_VERSION		"1.0.11"
19 #define IBMVFC_DRIVER_DATE		"(April 12, 2013)"
20 
21 #define IBMVFC_DEFAULT_TIMEOUT	60
22 #define IBMVFC_ADISC_CANCEL_TIMEOUT	45
23 #define IBMVFC_ADISC_TIMEOUT		15
24 #define IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT	\
25 		(IBMVFC_ADISC_TIMEOUT + IBMVFC_ADISC_CANCEL_TIMEOUT)
26 #define IBMVFC_INIT_TIMEOUT		120
27 #define IBMVFC_ABORT_TIMEOUT		8
28 #define IBMVFC_ABORT_WAIT_TIMEOUT	40
29 #define IBMVFC_MAX_REQUESTS_DEFAULT	100
30 
31 #define IBMVFC_DEBUG			0
32 #define IBMVFC_MAX_TARGETS		1024
33 #define IBMVFC_MAX_LUN			0xffffffff
34 #define IBMVFC_MAX_SECTORS		0xffffu
35 #define IBMVFC_MAX_DISC_THREADS	4
36 #define IBMVFC_TGT_MEMPOOL_SZ		64
37 #define IBMVFC_MAX_CMDS_PER_LUN	64
38 #define IBMVFC_MAX_HOST_INIT_RETRIES	6
39 #define IBMVFC_MAX_TGT_INIT_RETRIES		3
40 #define IBMVFC_DEV_LOSS_TMO		(5 * 60)
41 #define IBMVFC_DEFAULT_LOG_LEVEL	2
42 #define IBMVFC_MAX_CDB_LEN		16
43 #define IBMVFC_CLS3_ERROR		0
44 #define IBMVFC_MQ			1
45 #define IBMVFC_SCSI_CHANNELS		8
46 #define IBMVFC_MAX_SCSI_QUEUES		16
47 #define IBMVFC_SCSI_HW_QUEUES		8
48 #define IBMVFC_MIG_NO_SUB_TO_CRQ	0
49 #define IBMVFC_MIG_NO_N_TO_M		0
50 
51 /*
52  * Ensure we have resources for ERP and initialization:
53  * 1 for ERP
54  * 1 for initialization
55  * 1 for NPIV Logout
56  * 2 for BSG passthru
57  * 2 for each discovery thread
58  */
59 #define IBMVFC_NUM_INTERNAL_REQ	(1 + 1 + 1 + 2 + (disc_threads * 2))
60 
61 #define IBMVFC_MAD_SUCCESS		0x00
62 #define IBMVFC_MAD_NOT_SUPPORTED	0xF1
63 #define IBMVFC_MAD_VERSION_NOT_SUPP	0xF2
64 #define IBMVFC_MAD_FAILED		0xF7
65 #define IBMVFC_MAD_DRIVER_FAILED	0xEE
66 #define IBMVFC_MAD_CRQ_ERROR		0xEF
67 
68 enum ibmvfc_crq_valid {
69 	IBMVFC_CRQ_CMD_RSP		= 0x80,
70 	IBMVFC_CRQ_INIT_RSP		= 0xC0,
71 	IBMVFC_CRQ_XPORT_EVENT		= 0xFF,
72 };
73 
74 enum ibmvfc_crq_init_msg {
75 	IBMVFC_CRQ_INIT			= 0x01,
76 	IBMVFC_CRQ_INIT_COMPLETE	= 0x02,
77 };
78 
79 enum ibmvfc_crq_xport_evts {
80 	IBMVFC_PARTNER_FAILED		= 0x01,
81 	IBMVFC_PARTNER_DEREGISTER	= 0x02,
82 	IBMVFC_PARTITION_MIGRATED	= 0x06,
83 };
84 
85 enum ibmvfc_cmd_status_flags {
86 	IBMVFC_FABRIC_MAPPED		= 0x0001,
87 	IBMVFC_VIOS_FAILURE		= 0x0002,
88 	IBMVFC_FC_FAILURE			= 0x0004,
89 	IBMVFC_FC_SCSI_ERROR		= 0x0008,
90 	IBMVFC_HW_EVENT_LOGGED		= 0x0010,
91 	IBMVFC_VIOS_LOGGED		= 0x0020,
92 };
93 
94 enum ibmvfc_fabric_mapped_errors {
95 	IBMVFC_UNABLE_TO_ESTABLISH	= 0x0001,
96 	IBMVFC_XPORT_FAULT		= 0x0002,
97 	IBMVFC_CMD_TIMEOUT		= 0x0003,
98 	IBMVFC_ENETDOWN			= 0x0004,
99 	IBMVFC_HW_FAILURE			= 0x0005,
100 	IBMVFC_LINK_DOWN_ERR		= 0x0006,
101 	IBMVFC_LINK_DEAD_ERR		= 0x0007,
102 	IBMVFC_UNABLE_TO_REGISTER	= 0x0008,
103 	IBMVFC_XPORT_BUSY			= 0x000A,
104 	IBMVFC_XPORT_DEAD			= 0x000B,
105 	IBMVFC_CONFIG_ERROR		= 0x000C,
106 	IBMVFC_NAME_SERVER_FAIL		= 0x000D,
107 	IBMVFC_LINK_HALTED		= 0x000E,
108 	IBMVFC_XPORT_GENERAL		= 0x8000,
109 };
110 
111 enum ibmvfc_vios_errors {
112 	IBMVFC_CRQ_FAILURE			= 0x0001,
113 	IBMVFC_SW_FAILURE				= 0x0002,
114 	IBMVFC_INVALID_PARAMETER		= 0x0003,
115 	IBMVFC_MISSING_PARAMETER		= 0x0004,
116 	IBMVFC_HOST_IO_BUS			= 0x0005,
117 	IBMVFC_TRANS_CANCELLED			= 0x0006,
118 	IBMVFC_TRANS_CANCELLED_IMPLICIT	= 0x0007,
119 	IBMVFC_INSUFFICIENT_RESOURCE		= 0x0008,
120 	IBMVFC_PLOGI_REQUIRED			= 0x0010,
121 	IBMVFC_COMMAND_FAILED			= 0x8000,
122 };
123 
124 enum ibmvfc_mad_types {
125 	IBMVFC_NPIV_LOGIN		= 0x0001,
126 	IBMVFC_DISC_TARGETS	= 0x0002,
127 	IBMVFC_PORT_LOGIN		= 0x0004,
128 	IBMVFC_PROCESS_LOGIN	= 0x0008,
129 	IBMVFC_QUERY_TARGET	= 0x0010,
130 	IBMVFC_MOVE_LOGIN		= 0x0020,
131 	IBMVFC_IMPLICIT_LOGOUT	= 0x0040,
132 	IBMVFC_PASSTHRU		= 0x0200,
133 	IBMVFC_TMF_MAD		= 0x0100,
134 	IBMVFC_NPIV_LOGOUT	= 0x0800,
135 	IBMVFC_CHANNEL_ENQUIRY	= 0x1000,
136 	IBMVFC_CHANNEL_SETUP	= 0x2000,
137 	IBMVFC_CONNECTION_INFO	= 0x4000,
138 };
139 
140 struct ibmvfc_mad_common {
141 	__be32 version;
142 	__be32 reserved;
143 	__be32 opcode;
144 	__be16 status;
145 	__be16 length;
146 	__be64 tag;
147 } __packed __aligned(8);
148 
149 struct ibmvfc_npiv_login_mad {
150 	struct ibmvfc_mad_common common;
151 	struct srp_direct_buf buffer;
152 } __packed __aligned(8);
153 
154 struct ibmvfc_npiv_logout_mad {
155 	struct ibmvfc_mad_common common;
156 } __packed __aligned(8);
157 
158 #define IBMVFC_MAX_NAME 256
159 
160 struct ibmvfc_npiv_login {
161 	__be32 ostype;
162 #define IBMVFC_OS_LINUX	0x02
163 	__be32 pad;
164 	__be64 max_dma_len;
165 	__be32 max_payload;
166 	__be32 max_response;
167 	__be32 partition_num;
168 	__be32 vfc_frame_version;
169 	__be16 fcp_version;
170 	__be16 flags;
171 #define IBMVFC_CLIENT_MIGRATED	0x01
172 #define IBMVFC_FLUSH_ON_HALT		0x02
173 	__be32 max_cmds;
174 	__be64 capabilities;
175 #define IBMVFC_CAN_MIGRATE		0x01
176 #define IBMVFC_CAN_USE_CHANNELS		0x02
177 #define IBMVFC_CAN_HANDLE_FPIN		0x04
178 #define IBMVFC_CAN_USE_MAD_VERSION	0x08
179 #define IBMVFC_CAN_SEND_VF_WWPN		0x10
180 	__be64 node_name;
181 	struct srp_direct_buf async;
182 	u8 partition_name[IBMVFC_MAX_NAME];
183 	u8 device_name[IBMVFC_MAX_NAME];
184 	u8 drc_name[IBMVFC_MAX_NAME];
185 	__be64 reserved2[2];
186 } __packed __aligned(8);
187 
188 struct ibmvfc_common_svc_parms {
189 	__be16 fcph_version;
190 	__be16 b2b_credit;
191 	__be16 features;
192 	__be16 bb_rcv_sz; /* upper nibble is BB_SC_N */
193 	__be32 ratov;
194 	__be32 edtov;
195 } __packed __aligned(4);
196 
197 struct ibmvfc_service_parms {
198 	struct ibmvfc_common_svc_parms common;
199 	u8 port_name[8];
200 	u8 node_name[8];
201 	__be32 class1_parms[4];
202 	__be32 class2_parms[4];
203 	__be32 class3_parms[4];
204 	__be32 obsolete[4];
205 	__be32 vendor_version[4];
206 	__be32 services_avail[2];
207 	__be32 ext_len;
208 	__be32 reserved[30];
209 	__be32 clk_sync_qos[2];
210 	__be32 reserved2;
211 } __packed __aligned(4);
212 
213 struct ibmvfc_npiv_login_resp {
214 	__be32 version;
215 	__be16 status;
216 	__be16 error;
217 	__be32 flags;
218 #define IBMVFC_NATIVE_FC		0x01
219 	__be32 reserved;
220 	__be64 capabilities;
221 #define IBMVFC_CAN_FLUSH_ON_HALT	0x08
222 #define IBMVFC_CAN_SUPPRESS_ABTS	0x10
223 #define IBMVFC_MAD_VERSION_CAP		0x20
224 #define IBMVFC_HANDLE_VF_WWPN		0x40
225 #define IBMVFC_CAN_SUPPORT_CHANNELS	0x80
226 	__be32 max_cmds;
227 	__be32 scsi_id_sz;
228 	__be64 max_dma_len;
229 	__be64 scsi_id;
230 	__be64 port_name;
231 	__be64 node_name;
232 	__be64 link_speed;
233 	u8 partition_name[IBMVFC_MAX_NAME];
234 	u8 device_name[IBMVFC_MAX_NAME];
235 	u8 port_loc_code[IBMVFC_MAX_NAME];
236 	u8 drc_name[IBMVFC_MAX_NAME];
237 	struct ibmvfc_service_parms service_parms;
238 	__be64 reserved2;
239 } __packed __aligned(8);
240 
241 union ibmvfc_npiv_login_data {
242 	struct ibmvfc_npiv_login login;
243 	struct ibmvfc_npiv_login_resp resp;
244 } __packed __aligned(8);
245 
246 struct ibmvfc_discover_targets_entry {
247 	__be32 scsi_id;
248 	__be32 pad;
249 	__be64 wwpn;
250 #define IBMVFC_DISC_TGT_SCSI_ID_MASK	0x00ffffff
251 } __packed __aligned(8);
252 
253 struct ibmvfc_discover_targets {
254 	struct ibmvfc_mad_common common;
255 	struct srp_direct_buf buffer;
256 	__be32 flags;
257 #define IBMVFC_DISC_TGT_PORT_ID_WWPN_LIST	0x02
258 	__be16 status;
259 	__be16 error;
260 	__be32 bufflen;
261 	__be32 num_avail;
262 	__be32 num_written;
263 	__be64 reserved[2];
264 } __packed __aligned(8);
265 
266 enum ibmvfc_fc_reason {
267 	IBMVFC_INVALID_ELS_CMD_CODE	= 0x01,
268 	IBMVFC_INVALID_VERSION		= 0x02,
269 	IBMVFC_LOGICAL_ERROR		= 0x03,
270 	IBMVFC_INVALID_CT_IU_SIZE	= 0x04,
271 	IBMVFC_LOGICAL_BUSY		= 0x05,
272 	IBMVFC_PROTOCOL_ERROR		= 0x07,
273 	IBMVFC_UNABLE_TO_PERFORM_REQ	= 0x09,
274 	IBMVFC_CMD_NOT_SUPPORTED	= 0x0B,
275 	IBMVFC_SERVER_NOT_AVAIL		= 0x0D,
276 	IBMVFC_CMD_IN_PROGRESS		= 0x0E,
277 	IBMVFC_VENDOR_SPECIFIC		= 0xFF,
278 };
279 
280 enum ibmvfc_fc_type {
281 	IBMVFC_FABRIC_REJECT	= 0x01,
282 	IBMVFC_PORT_REJECT	= 0x02,
283 	IBMVFC_LS_REJECT		= 0x03,
284 	IBMVFC_FABRIC_BUSY	= 0x04,
285 	IBMVFC_PORT_BUSY		= 0x05,
286 	IBMVFC_BASIC_REJECT	= 0x06,
287 };
288 
289 enum ibmvfc_gs_explain {
290 	IBMVFC_PORT_NAME_NOT_REG	= 0x02,
291 };
292 
293 struct ibmvfc_port_login {
294 	struct ibmvfc_mad_common common;
295 	__be64 scsi_id;
296 	__be16 reserved;
297 	__be16 fc_service_class;
298 	__be32 blksz;
299 	__be32 hdr_per_blk;
300 	__be16 status;
301 	__be16 error;		/* also fc_reason */
302 	__be16 fc_explain;
303 	__be16 fc_type;
304 	__be32 reserved2;
305 	struct ibmvfc_service_parms service_parms;
306 	struct ibmvfc_service_parms service_parms_change;
307 	__be64 target_wwpn;
308 	__be64 reserved3[2];
309 } __packed __aligned(8);
310 
311 struct ibmvfc_move_login {
312 	struct ibmvfc_mad_common common;
313 	__be64 old_scsi_id;
314 	__be64 new_scsi_id;
315 	__be64 wwpn;
316 	__be64 node_name;
317 	__be32 flags;
318 #define IBMVFC_MOVE_LOGIN_IMPLICIT_OLD_FAILED	0x01
319 #define IBMVFC_MOVE_LOGIN_IMPLICIT_NEW_FAILED	0x02
320 #define IBMVFC_MOVE_LOGIN_PORT_LOGIN_FAILED	0x04
321 	__be32 reserved;
322 	struct ibmvfc_service_parms service_parms;
323 	struct ibmvfc_service_parms service_parms_change;
324 	__be32 reserved2;
325 	__be16 service_class;
326 	__be16 vios_flags;
327 #define IBMVFC_MOVE_LOGIN_VF_NOT_SENT_ADAPTER	0x01
328 	__be64 reserved3;
329 } __packed __aligned(8);
330 
331 struct ibmvfc_prli_svc_parms {
332 	u8 type;
333 #define IBMVFC_SCSI_FCP_TYPE		0x08
334 	u8 type_ext;
335 	__be16 flags;
336 #define IBMVFC_PRLI_ORIG_PA_VALID			0x8000
337 #define IBMVFC_PRLI_RESP_PA_VALID			0x4000
338 #define IBMVFC_PRLI_EST_IMG_PAIR			0x2000
339 	__be32 orig_pa;
340 	__be32 resp_pa;
341 	__be32 service_parms;
342 #define IBMVFC_PRLI_TASK_RETRY			0x00000200
343 #define IBMVFC_PRLI_RETRY				0x00000100
344 #define IBMVFC_PRLI_DATA_OVERLAY			0x00000040
345 #define IBMVFC_PRLI_INITIATOR_FUNC			0x00000020
346 #define IBMVFC_PRLI_TARGET_FUNC			0x00000010
347 #define IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED	0x00000002
348 #define IBMVFC_PRLI_WR_FCP_XFER_RDY_DISABLED	0x00000001
349 } __packed __aligned(4);
350 
351 struct ibmvfc_process_login {
352 	struct ibmvfc_mad_common common;
353 	__be64 scsi_id;
354 	struct ibmvfc_prli_svc_parms parms;
355 	u8 reserved[48];
356 	__be16 status;
357 	__be16 error;			/* also fc_reason */
358 	__be32 reserved2;
359 	__be64 target_wwpn;
360 	__be64 reserved3[2];
361 } __packed __aligned(8);
362 
363 struct ibmvfc_query_tgt {
364 	struct ibmvfc_mad_common common;
365 	__be64 wwpn;
366 	__be64 scsi_id;
367 	__be16 status;
368 	__be16 error;
369 	__be16 fc_explain;
370 	__be16 fc_type;
371 	__be64 reserved[2];
372 } __packed __aligned(8);
373 
374 struct ibmvfc_implicit_logout {
375 	struct ibmvfc_mad_common common;
376 	__be64 old_scsi_id;
377 	__be64 reserved[2];
378 } __packed __aligned(8);
379 
380 struct ibmvfc_tmf {
381 	struct ibmvfc_mad_common common;
382 	__be64 scsi_id;
383 	struct scsi_lun lun;
384 	__be32 flags;
385 #define IBMVFC_TMF_ABORT_TASK		0x02
386 #define IBMVFC_TMF_ABORT_TASK_SET	0x04
387 #define IBMVFC_TMF_LUN_RESET		0x10
388 #define IBMVFC_TMF_TGT_RESET		0x20
389 #define IBMVFC_TMF_LUA_VALID		0x40
390 #define IBMVFC_TMF_SUPPRESS_ABTS	0x80
391 	__be32 cancel_key;
392 	__be32 my_cancel_key;
393 	__be32 pad;
394 	__be64 target_wwpn;
395 	__be64 task_tag;
396 	__be64 reserved[2];
397 } __packed __aligned(8);
398 
399 enum ibmvfc_fcp_rsp_info_codes {
400 	RSP_NO_FAILURE		= 0x00,
401 	RSP_TMF_REJECTED		= 0x04,
402 	RSP_TMF_FAILED		= 0x05,
403 	RSP_TMF_INVALID_LUN	= 0x09,
404 };
405 
406 struct ibmvfc_fcp_rsp_info {
407 	u8 reserved[3];
408 	u8 rsp_code;
409 	u8 reserved2[4];
410 } __packed __aligned(2);
411 
412 enum ibmvfc_fcp_rsp_flags {
413 	FCP_BIDI_RSP			= 0x80,
414 	FCP_BIDI_READ_RESID_UNDER	= 0x40,
415 	FCP_BIDI_READ_RESID_OVER	= 0x20,
416 	FCP_CONF_REQ			= 0x10,
417 	FCP_RESID_UNDER			= 0x08,
418 	FCP_RESID_OVER			= 0x04,
419 	FCP_SNS_LEN_VALID			= 0x02,
420 	FCP_RSP_LEN_VALID			= 0x01,
421 };
422 
423 union ibmvfc_fcp_rsp_data {
424 	struct ibmvfc_fcp_rsp_info info;
425 	u8 sense[SCSI_SENSE_BUFFERSIZE + sizeof(struct ibmvfc_fcp_rsp_info)];
426 } __packed __aligned(8);
427 
428 struct ibmvfc_fcp_rsp {
429 	__be64 reserved;
430 	__be16 retry_delay_timer;
431 	u8 flags;
432 	u8 scsi_status;
433 	__be32 fcp_resid;
434 	__be32 fcp_sense_len;
435 	__be32 fcp_rsp_len;
436 	union ibmvfc_fcp_rsp_data data;
437 } __packed __aligned(8);
438 
439 enum ibmvfc_cmd_flags {
440 	IBMVFC_SCATTERLIST	= 0x0001,
441 	IBMVFC_NO_MEM_DESC	= 0x0002,
442 	IBMVFC_READ			= 0x0004,
443 	IBMVFC_WRITE		= 0x0008,
444 	IBMVFC_TMF			= 0x0080,
445 	IBMVFC_CLASS_3_ERR	= 0x0100,
446 };
447 
448 enum ibmvfc_fc_task_attr {
449 	IBMVFC_SIMPLE_TASK	= 0x00,
450 	IBMVFC_HEAD_OF_QUEUE	= 0x01,
451 	IBMVFC_ORDERED_TASK	= 0x02,
452 	IBMVFC_ACA_TASK		= 0x04,
453 };
454 
455 enum ibmvfc_fc_tmf_flags {
456 	IBMVFC_ABORT_TASK_SET	= 0x02,
457 	IBMVFC_LUN_RESET		= 0x10,
458 	IBMVFC_TARGET_RESET	= 0x20,
459 };
460 
461 struct ibmvfc_fcp_cmd_iu {
462 	struct scsi_lun lun;
463 	u8 crn;
464 	u8 pri_task_attr;
465 	u8 tmf_flags;
466 	u8 add_cdb_len;
467 #define IBMVFC_RDDATA		0x02
468 #define IBMVFC_WRDATA		0x01
469 	u8 cdb[IBMVFC_MAX_CDB_LEN];
470 	__be32 xfer_len;
471 } __packed __aligned(4);
472 
473 struct ibmvfc_cmd {
474 	__be64 task_tag;
475 	__be32 frame_type;
476 	__be32 payload_len;
477 	__be32 resp_len;
478 	__be32 adapter_resid;
479 	__be16 status;
480 	__be16 error;
481 	__be16 flags;
482 	__be16 response_flags;
483 #define IBMVFC_ADAPTER_RESID_VALID	0x01
484 	__be32 cancel_key;
485 	__be32 exchange_id;
486 	struct srp_direct_buf ext_func;
487 	struct srp_direct_buf ioba;
488 	struct srp_direct_buf resp;
489 	__be64 correlation;
490 	__be64 tgt_scsi_id;
491 	__be64 tag;
492 	__be64 target_wwpn;
493 	__be64 reserved3;
494 	union {
495 		struct {
496 			struct ibmvfc_fcp_cmd_iu iu;
497 			struct ibmvfc_fcp_rsp rsp;
498 		} v1;
499 		struct {
500 			__be64 reserved4;
501 			struct ibmvfc_fcp_cmd_iu iu;
502 			struct ibmvfc_fcp_rsp rsp;
503 		} v2;
504 	};
505 } __packed __aligned(8);
506 
507 struct ibmvfc_passthru_fc_iu {
508 	__be32 payload[7];
509 #define IBMVFC_ADISC	0x52000000
510 	__be32 response[7];
511 };
512 
513 struct ibmvfc_passthru_iu {
514 	__be64 task_tag;
515 	__be32 cmd_len;
516 	__be32 rsp_len;
517 	__be16 status;
518 	__be16 error;
519 	__be32 flags;
520 #define IBMVFC_FC_ELS		0x01
521 #define IBMVFC_FC_CT_IU		0x02
522 	__be32 cancel_key;
523 #define IBMVFC_PASSTHRU_CANCEL_KEY	0x80000000
524 #define IBMVFC_INTERNAL_CANCEL_KEY	0x80000001
525 	__be32 reserved;
526 	struct srp_direct_buf cmd;
527 	struct srp_direct_buf rsp;
528 	__be64 correlation;
529 	__be64 scsi_id;
530 	__be64 tag;
531 	__be64 target_wwpn;
532 	__be64 reserved2[2];
533 } __packed __aligned(8);
534 
535 struct ibmvfc_passthru_mad {
536 	struct ibmvfc_mad_common common;
537 	struct srp_direct_buf cmd_ioba;
538 	struct ibmvfc_passthru_iu iu;
539 	struct ibmvfc_passthru_fc_iu fc_iu;
540 } __packed __aligned(8);
541 
542 struct ibmvfc_channel_enquiry {
543 	struct ibmvfc_mad_common common;
544 	__be32 flags;
545 #define IBMVFC_NO_CHANNELS_TO_CRQ_SUPPORT	0x01
546 #define IBMVFC_SUPPORT_VARIABLE_SUBQ_MSG	0x02
547 #define IBMVFC_NO_N_TO_M_CHANNELS_SUPPORT	0x04
548 	__be32 num_scsi_subq_channels;
549 	__be32 num_nvmeof_subq_channels;
550 	__be32 num_scsi_vas_channels;
551 	__be32 num_nvmeof_vas_channels;
552 } __packed __aligned(8);
553 
554 struct ibmvfc_channel_setup_mad {
555 	struct ibmvfc_mad_common common;
556 	struct srp_direct_buf buffer;
557 } __packed __aligned(8);
558 
559 #define IBMVFC_MAX_CHANNELS	502
560 
561 struct ibmvfc_channel_setup {
562 	__be32 flags;
563 #define IBMVFC_CANCEL_CHANNELS		0x01
564 #define IBMVFC_USE_BUFFER		0x02
565 #define IBMVFC_CHANNELS_CANCELED	0x04
566 	__be32 reserved;
567 	__be32 num_scsi_subq_channels;
568 	__be32 num_nvmeof_subq_channels;
569 	__be32 num_scsi_vas_channels;
570 	__be32 num_nvmeof_vas_channels;
571 	struct srp_direct_buf buffer;
572 	__be64 reserved2[5];
573 	__be64 channel_handles[IBMVFC_MAX_CHANNELS];
574 } __packed __aligned(8);
575 
576 struct ibmvfc_connection_info {
577 	struct ibmvfc_mad_common common;
578 	__be64 information_bits;
579 #define IBMVFC_NO_FC_IO_CHANNEL		0x01
580 #define IBMVFC_NO_PHYP_VAS		0x02
581 #define IBMVFC_NO_PHYP_SUBQ		0x04
582 #define IBMVFC_PHYP_DEPRECATED_SUBQ	0x08
583 #define IBMVFC_PHYP_PRESERVED_SUBQ	0x10
584 #define IBMVFC_PHYP_FULL_SUBQ		0x20
585 	__be64 reserved[16];
586 } __packed __aligned(8);
587 
588 struct ibmvfc_trace_start_entry {
589 	u32 xfer_len;
590 } __packed;
591 
592 struct ibmvfc_trace_end_entry {
593 	u16 status;
594 	u16 error;
595 	u8 fcp_rsp_flags;
596 	u8 rsp_code;
597 	u8 scsi_status;
598 	u8 reserved;
599 } __packed;
600 
601 struct ibmvfc_trace_entry {
602 	struct ibmvfc_event *evt;
603 	u32 time;
604 	u32 scsi_id;
605 	u32 lun;
606 	u8 fmt;
607 	u8 op_code;
608 	u8 tmf_flags;
609 	u8 type;
610 #define IBMVFC_TRC_START	0x00
611 #define IBMVFC_TRC_END		0xff
612 	union {
613 		struct ibmvfc_trace_start_entry start;
614 		struct ibmvfc_trace_end_entry end;
615 	} u;
616 } __packed __aligned(8);
617 
618 enum ibmvfc_crq_formats {
619 	IBMVFC_CMD_FORMAT		= 0x01,
620 	IBMVFC_ASYNC_EVENT	= 0x02,
621 	IBMVFC_MAD_FORMAT		= 0x04,
622 };
623 
624 enum ibmvfc_async_event {
625 	IBMVFC_AE_ELS_PLOGI		= 0x0001,
626 	IBMVFC_AE_ELS_LOGO		= 0x0002,
627 	IBMVFC_AE_ELS_PRLO		= 0x0004,
628 	IBMVFC_AE_SCN_NPORT		= 0x0008,
629 	IBMVFC_AE_SCN_GROUP		= 0x0010,
630 	IBMVFC_AE_SCN_DOMAIN		= 0x0020,
631 	IBMVFC_AE_SCN_FABRIC		= 0x0040,
632 	IBMVFC_AE_LINK_UP			= 0x0080,
633 	IBMVFC_AE_LINK_DOWN		= 0x0100,
634 	IBMVFC_AE_LINK_DEAD		= 0x0200,
635 	IBMVFC_AE_HALT			= 0x0400,
636 	IBMVFC_AE_RESUME			= 0x0800,
637 	IBMVFC_AE_ADAPTER_FAILED	= 0x1000,
638 	IBMVFC_AE_FPIN			= 0x2000,
639 };
640 
641 struct ibmvfc_async_desc {
642 	const char *desc;
643 	enum ibmvfc_async_event ae;
644 	int log_level;
645 };
646 
647 struct ibmvfc_crq {
648 	volatile u8 valid;
649 	volatile u8 format;
650 	u8 reserved[6];
651 	volatile __be64 ioba;
652 } __packed __aligned(8);
653 
654 struct ibmvfc_sub_crq {
655 	struct ibmvfc_crq crq;
656 	__be64 reserved[2];
657 } __packed __aligned(8);
658 
659 enum ibmvfc_ae_link_state {
660 	IBMVFC_AE_LS_LINK_UP		= 0x01,
661 	IBMVFC_AE_LS_LINK_BOUNCED	= 0x02,
662 	IBMVFC_AE_LS_LINK_DOWN		= 0x04,
663 	IBMVFC_AE_LS_LINK_DEAD		= 0x08,
664 };
665 
666 enum ibmvfc_ae_fpin_status {
667 	IBMVFC_AE_FPIN_LINK_CONGESTED	= 0x1,
668 	IBMVFC_AE_FPIN_PORT_CONGESTED	= 0x2,
669 	IBMVFC_AE_FPIN_PORT_CLEARED	= 0x3,
670 	IBMVFC_AE_FPIN_PORT_DEGRADED	= 0x4,
671 };
672 
673 struct ibmvfc_async_crq {
674 	volatile u8 valid;
675 	u8 link_state;
676 	u8 fpin_status;
677 	u8 pad;
678 	__be32 pad2;
679 	volatile __be64 event;
680 	volatile __be64 scsi_id;
681 	volatile __be64 wwpn;
682 	volatile __be64 node_name;
683 	__be64 reserved;
684 } __packed __aligned(8);
685 
686 union ibmvfc_iu {
687 	struct ibmvfc_mad_common mad_common;
688 	struct ibmvfc_npiv_login_mad npiv_login;
689 	struct ibmvfc_npiv_logout_mad npiv_logout;
690 	struct ibmvfc_discover_targets discover_targets;
691 	struct ibmvfc_port_login plogi;
692 	struct ibmvfc_process_login prli;
693 	struct ibmvfc_move_login move_login;
694 	struct ibmvfc_query_tgt query_tgt;
695 	struct ibmvfc_implicit_logout implicit_logout;
696 	struct ibmvfc_tmf tmf;
697 	struct ibmvfc_cmd cmd;
698 	struct ibmvfc_passthru_mad passthru;
699 	struct ibmvfc_channel_enquiry channel_enquiry;
700 	struct ibmvfc_channel_setup_mad channel_setup;
701 	struct ibmvfc_connection_info connection_info;
702 } __packed __aligned(8);
703 
704 enum ibmvfc_target_action {
705 	IBMVFC_TGT_ACTION_NONE = 0,
706 	IBMVFC_TGT_ACTION_INIT,
707 	IBMVFC_TGT_ACTION_INIT_WAIT,
708 	IBMVFC_TGT_ACTION_LOGOUT_RPORT,
709 	IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT,
710 	IBMVFC_TGT_ACTION_DEL_RPORT,
711 	IBMVFC_TGT_ACTION_DELETED_RPORT,
712 	IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT,
713 	IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT,
714 };
715 
716 struct ibmvfc_target {
717 	struct list_head queue;
718 	struct ibmvfc_host *vhost;
719 	u64 scsi_id;
720 	u64 wwpn;
721 	u64 new_scsi_id;
722 	struct fc_rport *rport;
723 	int target_id;
724 	enum ibmvfc_target_action action;
725 	int need_login;
726 	int add_rport;
727 	int init_retries;
728 	int logo_rcvd;
729 	int move_login;
730 	u32 cancel_key;
731 	struct ibmvfc_service_parms service_parms;
732 	struct ibmvfc_service_parms service_parms_change;
733 	struct fc_rport_identifiers ids;
734 	void (*job_step) (struct ibmvfc_target *);
735 	struct timer_list timer;
736 	struct kref kref;
737 };
738 
739 /* a unit of work for the hosting partition */
740 struct ibmvfc_event {
741 	struct list_head queue_list;
742 	struct list_head cancel;
743 	struct ibmvfc_host *vhost;
744 	struct ibmvfc_queue *queue;
745 	struct ibmvfc_target *tgt;
746 	struct scsi_cmnd *cmnd;
747 	atomic_t free;
748 	atomic_t active;
749 	union ibmvfc_iu *xfer_iu;
750 	void (*done)(struct ibmvfc_event *evt);
751 	void (*_done)(struct ibmvfc_event *evt);
752 	struct ibmvfc_crq crq;
753 	union ibmvfc_iu iu;
754 	union ibmvfc_iu *sync_iu;
755 	struct srp_direct_buf *ext_list;
756 	dma_addr_t ext_list_token;
757 	struct completion comp;
758 	struct completion *eh_comp;
759 	struct timer_list timer;
760 	u16 hwq;
761 };
762 
763 /* a pool of event structs for use */
764 struct ibmvfc_event_pool {
765 	struct ibmvfc_event *events;
766 	u32 size;
767 	union ibmvfc_iu *iu_storage;
768 	dma_addr_t iu_token;
769 };
770 
771 enum ibmvfc_msg_fmt {
772 	IBMVFC_CRQ_FMT = 0,
773 	IBMVFC_ASYNC_FMT,
774 	IBMVFC_SUB_CRQ_FMT,
775 };
776 
777 union ibmvfc_msgs {
778 	void *handle;
779 	struct ibmvfc_crq *crq;
780 	struct ibmvfc_async_crq *async;
781 	struct ibmvfc_sub_crq *scrq;
782 };
783 
784 struct ibmvfc_queue {
785 	union ibmvfc_msgs msgs;
786 	dma_addr_t msg_token;
787 	enum ibmvfc_msg_fmt fmt;
788 	int size, cur;
789 	spinlock_t _lock;
790 	spinlock_t *q_lock;
791 
792 	struct ibmvfc_host *vhost;
793 	struct ibmvfc_event_pool evt_pool;
794 	struct list_head sent;
795 	struct list_head free;
796 	spinlock_t l_lock;
797 
798 	union ibmvfc_iu cancel_rsp;
799 
800 	/* Sub-CRQ fields */
801 	unsigned long cookie;
802 	unsigned long vios_cookie;
803 	unsigned long hw_irq;
804 	unsigned long irq;
805 	unsigned long hwq_id;
806 	char name[32];
807 };
808 
809 struct ibmvfc_scsi_channels {
810 	struct ibmvfc_queue *scrqs;
811 	unsigned int active_queues;
812 };
813 
814 enum ibmvfc_host_action {
815 	IBMVFC_HOST_ACTION_NONE = 0,
816 	IBMVFC_HOST_ACTION_RESET,
817 	IBMVFC_HOST_ACTION_REENABLE,
818 	IBMVFC_HOST_ACTION_LOGO,
819 	IBMVFC_HOST_ACTION_LOGO_WAIT,
820 	IBMVFC_HOST_ACTION_INIT,
821 	IBMVFC_HOST_ACTION_INIT_WAIT,
822 	IBMVFC_HOST_ACTION_QUERY,
823 	IBMVFC_HOST_ACTION_QUERY_TGTS,
824 	IBMVFC_HOST_ACTION_TGT_DEL,
825 	IBMVFC_HOST_ACTION_ALLOC_TGTS,
826 	IBMVFC_HOST_ACTION_TGT_INIT,
827 	IBMVFC_HOST_ACTION_TGT_DEL_FAILED,
828 };
829 
830 enum ibmvfc_host_state {
831 	IBMVFC_NO_CRQ = 0,
832 	IBMVFC_INITIALIZING,
833 	IBMVFC_ACTIVE,
834 	IBMVFC_HALTED,
835 	IBMVFC_LINK_DOWN,
836 	IBMVFC_LINK_DEAD,
837 	IBMVFC_HOST_OFFLINE,
838 };
839 
840 struct ibmvfc_host {
841 	char name[8];
842 	struct list_head queue;
843 	struct Scsi_Host *host;
844 	enum ibmvfc_host_state state;
845 	enum ibmvfc_host_action action;
846 #define IBMVFC_NUM_TRACE_INDEX_BITS		8
847 #define IBMVFC_NUM_TRACE_ENTRIES		(1 << IBMVFC_NUM_TRACE_INDEX_BITS)
848 #define IBMVFC_TRACE_INDEX_MASK			(IBMVFC_NUM_TRACE_ENTRIES - 1)
849 #define IBMVFC_TRACE_SIZE	(sizeof(struct ibmvfc_trace_entry) * IBMVFC_NUM_TRACE_ENTRIES)
850 	struct ibmvfc_trace_entry *trace;
851 	atomic_t trace_index;
852 	int num_targets;
853 	struct list_head targets;
854 	struct list_head purge;
855 	struct device *dev;
856 	struct dma_pool *sg_pool;
857 	mempool_t *tgt_pool;
858 	struct ibmvfc_queue crq;
859 	struct ibmvfc_queue async_crq;
860 	struct ibmvfc_scsi_channels scsi_scrqs;
861 	struct ibmvfc_npiv_login login_info;
862 	union ibmvfc_npiv_login_data *login_buf;
863 	dma_addr_t login_buf_dma;
864 	struct ibmvfc_channel_setup *channel_setup_buf;
865 	dma_addr_t channel_setup_dma;
866 	int disc_buf_sz;
867 	int log_level;
868 	struct ibmvfc_discover_targets_entry *disc_buf;
869 	struct mutex passthru_mutex;
870 	int max_vios_scsi_channels;
871 	int task_set;
872 	int init_retries;
873 	int discovery_threads;
874 	int abort_threads;
875 	int client_migrated;
876 	int reinit;
877 	int delay_init;
878 	int scan_complete;
879 	int scan_timeout;
880 	int logged_in;
881 	int mq_enabled;
882 	int using_channels;
883 	int do_enquiry;
884 	int client_scsi_channels;
885 	int aborting_passthru;
886 	int events_to_log;
887 #define IBMVFC_AE_LINKUP	0x0001
888 #define IBMVFC_AE_LINKDOWN	0x0002
889 #define IBMVFC_AE_RSCN		0x0004
890 	dma_addr_t disc_buf_dma;
891 	unsigned int partition_number;
892 	char partition_name[97];
893 	void (*job_step) (struct ibmvfc_host *);
894 	struct task_struct *work_thread;
895 	struct tasklet_struct tasklet;
896 	struct work_struct rport_add_work_q;
897 	wait_queue_head_t init_wait_q;
898 	wait_queue_head_t work_wait_q;
899 };
900 
901 #define DBG_CMD(CMD) do { if (ibmvfc_debug) CMD; } while (0)
902 
903 #define tgt_dbg(t, fmt, ...)			\
904 	DBG_CMD(dev_info((t)->vhost->dev, "%llX: " fmt, (t)->scsi_id, ##__VA_ARGS__))
905 
906 #define tgt_info(t, fmt, ...)		\
907 	dev_info((t)->vhost->dev, "%llX: " fmt, (t)->scsi_id, ##__VA_ARGS__)
908 
909 #define tgt_err(t, fmt, ...)		\
910 	dev_err((t)->vhost->dev, "%llX: " fmt, (t)->scsi_id, ##__VA_ARGS__)
911 
912 #define tgt_log(t, level, fmt, ...) \
913 	do { \
914 		if ((t)->vhost->log_level >= level) \
915 			tgt_err(t, fmt, ##__VA_ARGS__); \
916 	} while (0)
917 
918 #define ibmvfc_dbg(vhost, ...) \
919 	DBG_CMD(dev_info((vhost)->dev, ##__VA_ARGS__))
920 
921 #define ibmvfc_log(vhost, level, ...) \
922 	do { \
923 		if ((vhost)->log_level >= level) \
924 			dev_err((vhost)->dev, ##__VA_ARGS__); \
925 	} while (0)
926 
927 #define ENTER DBG_CMD(printk(KERN_INFO IBMVFC_NAME": Entering %s\n", __func__))
928 #define LEAVE DBG_CMD(printk(KERN_INFO IBMVFC_NAME": Leaving %s\n", __func__))
929 
930 #ifdef CONFIG_SCSI_IBMVFC_TRACE
931 #define ibmvfc_create_trace_file(kobj, attr) sysfs_create_bin_file(kobj, attr)
932 #define ibmvfc_remove_trace_file(kobj, attr) sysfs_remove_bin_file(kobj, attr)
933 #else
934 #define ibmvfc_create_trace_file(kobj, attr) 0
935 #define ibmvfc_remove_trace_file(kobj, attr) do { } while (0)
936 #endif
937 
938 #endif
939