1 /*
2 * libcxgbi.h: Chelsio common library for T3/T4 iSCSI driver.
3 *
4 * Copyright (c) 2010-2015 Chelsio Communications, Inc.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation.
9 *
10 * Written by: Karen Xie (kxie@chelsio.com)
11 * Written by: Rakesh Ranjan (rranjan@chelsio.com)
12 */
13
14 #ifndef __LIBCXGBI_H__
15 #define __LIBCXGBI_H__
16
17 #include <linux/kernel.h>
18 #include <linux/errno.h>
19 #include <linux/types.h>
20 #include <linux/debugfs.h>
21 #include <linux/list.h>
22 #include <linux/netdevice.h>
23 #include <linux/if_vlan.h>
24 #include <linux/scatterlist.h>
25 #include <linux/skbuff.h>
26 #include <linux/vmalloc.h>
27 #include <linux/version.h>
28 #include <scsi/scsi_device.h>
29 #include <scsi/libiscsi_tcp.h>
30
31 #include <libcxgb_ppm.h>
32
33 enum cxgbi_dbg_flag {
34 CXGBI_DBG_ISCSI,
35 CXGBI_DBG_DDP,
36 CXGBI_DBG_TOE,
37 CXGBI_DBG_SOCK,
38
39 CXGBI_DBG_PDU_TX,
40 CXGBI_DBG_PDU_RX,
41 CXGBI_DBG_DEV,
42 };
43
44 #define log_debug(level, fmt, ...) \
45 do { \
46 if (dbg_level & (level)) \
47 pr_info(fmt, ##__VA_ARGS__); \
48 } while (0)
49
50 #define pr_info_ipaddr(fmt_trail, \
51 addr1, addr2, args_trail...) \
52 do { \
53 if (!((1 << CXGBI_DBG_SOCK) & dbg_level)) \
54 break; \
55 pr_info("%pISpc - %pISpc, " fmt_trail, \
56 addr1, addr2, args_trail); \
57 } while (0)
58
59 /* max. connections per adapter */
60 #define CXGBI_MAX_CONN 16384
61
62 /* always allocate rooms for AHS */
63 #define SKB_TX_ISCSI_PDU_HEADER_MAX \
64 (sizeof(struct iscsi_hdr) + ISCSI_MAX_AHS_SIZE)
65
66 #define ISCSI_PDU_NONPAYLOAD_LEN 312 /* bhs(48) + ahs(256) + digest(8)*/
67
68 /*
69 * align pdu size to multiple of 512 for better performance
70 */
71 #define cxgbi_align_pdu_size(n) do { n = (n) & (~511); } while (0)
72
73 #define ULP2_MODE_ISCSI 2
74
75 #define ULP2_MAX_PKT_SIZE 16224
76 #define ULP2_MAX_PDU_PAYLOAD \
77 (ULP2_MAX_PKT_SIZE - ISCSI_PDU_NONPAYLOAD_LEN)
78
79 #define CXGBI_ULP2_MAX_ISO_PAYLOAD 65535
80
81 #define CXGBI_MAX_ISO_DATA_IN_SKB \
82 min_t(u32, MAX_SKB_FRAGS << PAGE_SHIFT, CXGBI_ULP2_MAX_ISO_PAYLOAD)
83
84 #define cxgbi_is_iso_config(csk) ((csk)->cdev->skb_iso_txhdr)
85 #define cxgbi_is_iso_disabled(csk) ((csk)->disable_iso)
86
87 /*
88 * For iscsi connections HW may inserts digest bytes into the pdu. Those digest
89 * bytes are not sent by the host but are part of the TCP payload and therefore
90 * consume TCP sequence space.
91 */
92 static const unsigned int ulp2_extra_len[] = { 0, 4, 4, 8 };
cxgbi_ulp_extra_len(int submode)93 static inline unsigned int cxgbi_ulp_extra_len(int submode)
94 {
95 return ulp2_extra_len[submode & 3];
96 }
97
98 #define CPL_RX_DDP_STATUS_DDP_SHIFT 16 /* ddp'able */
99 #define CPL_RX_DDP_STATUS_PAD_SHIFT 19 /* pad error */
100 #define CPL_RX_DDP_STATUS_HCRC_SHIFT 20 /* hcrc error */
101 #define CPL_RX_DDP_STATUS_DCRC_SHIFT 21 /* dcrc error */
102
103 /*
104 * sge_opaque_hdr -
105 * Opaque version of structure the SGE stores at skb->head of TX_DATA packets
106 * and for which we must reserve space.
107 */
108 struct sge_opaque_hdr {
109 void *dev;
110 dma_addr_t addr[MAX_SKB_FRAGS + 1];
111 };
112
113 struct cxgbi_sock {
114 struct cxgbi_device *cdev;
115
116 int tid;
117 int atid;
118 unsigned long flags;
119 unsigned int mtu;
120 unsigned short rss_qid;
121 unsigned short txq_idx;
122 unsigned short advmss;
123 unsigned int tx_chan;
124 unsigned int rx_chan;
125 unsigned int mss_idx;
126 unsigned int smac_idx;
127 unsigned char port_id;
128 int wr_max_cred;
129 int wr_cred;
130 int wr_una_cred;
131 #ifdef CONFIG_CHELSIO_T4_DCB
132 u8 dcb_priority;
133 #endif
134 unsigned char hcrc_len;
135 unsigned char dcrc_len;
136
137 void *l2t;
138 struct sk_buff *wr_pending_head;
139 struct sk_buff *wr_pending_tail;
140 struct sk_buff *cpl_close;
141 struct sk_buff *cpl_abort_req;
142 struct sk_buff *cpl_abort_rpl;
143 struct sk_buff *skb_ulp_lhdr;
144 spinlock_t lock;
145 struct kref refcnt;
146 unsigned int state;
147 unsigned int csk_family;
148 union {
149 struct sockaddr_in saddr;
150 struct sockaddr_in6 saddr6;
151 };
152 union {
153 struct sockaddr_in daddr;
154 struct sockaddr_in6 daddr6;
155 };
156 struct dst_entry *dst;
157 struct sk_buff_head receive_queue;
158 struct sk_buff_head write_queue;
159 struct timer_list retry_timer;
160 struct completion cmpl;
161 int err;
162 rwlock_t callback_lock;
163 void *user_data;
164
165 u32 rcv_nxt;
166 u32 copied_seq;
167 u32 rcv_wup;
168 u32 snd_nxt;
169 u32 snd_una;
170 u32 write_seq;
171 u32 snd_win;
172 u32 rcv_win;
173
174 bool disable_iso;
175 u32 no_tx_credits;
176 unsigned long prev_iso_ts;
177 };
178
179 /*
180 * connection states
181 */
182 enum cxgbi_sock_states{
183 CTP_CLOSED,
184 CTP_CONNECTING,
185 CTP_ACTIVE_OPEN,
186 CTP_ESTABLISHED,
187 CTP_ACTIVE_CLOSE,
188 CTP_PASSIVE_CLOSE,
189 CTP_CLOSE_WAIT_1,
190 CTP_CLOSE_WAIT_2,
191 CTP_ABORTING,
192 };
193
194 /*
195 * Connection flags -- many to track some close related events.
196 */
197 enum cxgbi_sock_flags {
198 CTPF_ABORT_RPL_RCVD, /*received one ABORT_RPL_RSS message */
199 CTPF_ABORT_REQ_RCVD, /*received one ABORT_REQ_RSS message */
200 CTPF_ABORT_RPL_PENDING, /* expecting an abort reply */
201 CTPF_TX_DATA_SENT, /* already sent a TX_DATA WR */
202 CTPF_ACTIVE_CLOSE_NEEDED,/* need to be closed */
203 CTPF_HAS_ATID, /* reserved atid */
204 CTPF_HAS_TID, /* reserved hw tid */
205 CTPF_OFFLOAD_DOWN, /* offload function off */
206 CTPF_LOGOUT_RSP_RCVD, /* received logout response */
207 };
208
209 struct cxgbi_skb_rx_cb {
210 __u32 ddigest;
211 __u32 pdulen;
212 };
213
214 struct cxgbi_skb_tx_cb {
215 void *handle;
216 void *arp_err_handler;
217 struct sk_buff *wr_next;
218 u16 iscsi_hdr_len;
219 u8 ulp_mode;
220 };
221
222 enum cxgbi_skcb_flags {
223 SKCBF_TX_NEED_HDR, /* packet needs a header */
224 SKCBF_TX_MEM_WRITE, /* memory write */
225 SKCBF_TX_FLAG_COMPL, /* wr completion flag */
226 SKCBF_RX_COALESCED, /* received whole pdu */
227 SKCBF_RX_HDR, /* received pdu header */
228 SKCBF_RX_DATA, /* received pdu payload */
229 SKCBF_RX_STATUS, /* received ddp status */
230 SKCBF_RX_ISCSI_COMPL, /* received iscsi completion */
231 SKCBF_RX_DATA_DDPD, /* pdu payload ddp'd */
232 SKCBF_RX_HCRC_ERR, /* header digest error */
233 SKCBF_RX_DCRC_ERR, /* data digest error */
234 SKCBF_RX_PAD_ERR, /* padding byte error */
235 SKCBF_TX_ISO, /* iso cpl in tx skb */
236 };
237
238 struct cxgbi_skb_cb {
239 union {
240 struct cxgbi_skb_rx_cb rx;
241 struct cxgbi_skb_tx_cb tx;
242 };
243 unsigned long flags;
244 unsigned int seq;
245 };
246
247 #define CXGBI_SKB_CB(skb) ((struct cxgbi_skb_cb *)&((skb)->cb[0]))
248 #define cxgbi_skcb_flags(skb) (CXGBI_SKB_CB(skb)->flags)
249 #define cxgbi_skcb_tcp_seq(skb) (CXGBI_SKB_CB(skb)->seq)
250 #define cxgbi_skcb_rx_ddigest(skb) (CXGBI_SKB_CB(skb)->rx.ddigest)
251 #define cxgbi_skcb_rx_pdulen(skb) (CXGBI_SKB_CB(skb)->rx.pdulen)
252 #define cxgbi_skcb_tx_wr_next(skb) (CXGBI_SKB_CB(skb)->tx.wr_next)
253 #define cxgbi_skcb_tx_iscsi_hdrlen(skb) (CXGBI_SKB_CB(skb)->tx.iscsi_hdr_len)
254 #define cxgbi_skcb_tx_ulp_mode(skb) (CXGBI_SKB_CB(skb)->tx.ulp_mode)
255
cxgbi_skcb_set_flag(struct sk_buff * skb,enum cxgbi_skcb_flags flag)256 static inline void cxgbi_skcb_set_flag(struct sk_buff *skb,
257 enum cxgbi_skcb_flags flag)
258 {
259 __set_bit(flag, &(cxgbi_skcb_flags(skb)));
260 }
261
cxgbi_skcb_clear_flag(struct sk_buff * skb,enum cxgbi_skcb_flags flag)262 static inline void cxgbi_skcb_clear_flag(struct sk_buff *skb,
263 enum cxgbi_skcb_flags flag)
264 {
265 __clear_bit(flag, &(cxgbi_skcb_flags(skb)));
266 }
267
cxgbi_skcb_test_flag(const struct sk_buff * skb,enum cxgbi_skcb_flags flag)268 static inline int cxgbi_skcb_test_flag(const struct sk_buff *skb,
269 enum cxgbi_skcb_flags flag)
270 {
271 return test_bit(flag, &(cxgbi_skcb_flags(skb)));
272 }
273
cxgbi_sock_set_flag(struct cxgbi_sock * csk,enum cxgbi_sock_flags flag)274 static inline void cxgbi_sock_set_flag(struct cxgbi_sock *csk,
275 enum cxgbi_sock_flags flag)
276 {
277 __set_bit(flag, &csk->flags);
278 log_debug(1 << CXGBI_DBG_SOCK,
279 "csk 0x%p,%u,0x%lx, bit %d.\n",
280 csk, csk->state, csk->flags, flag);
281 }
282
cxgbi_sock_clear_flag(struct cxgbi_sock * csk,enum cxgbi_sock_flags flag)283 static inline void cxgbi_sock_clear_flag(struct cxgbi_sock *csk,
284 enum cxgbi_sock_flags flag)
285 {
286 __clear_bit(flag, &csk->flags);
287 log_debug(1 << CXGBI_DBG_SOCK,
288 "csk 0x%p,%u,0x%lx, bit %d.\n",
289 csk, csk->state, csk->flags, flag);
290 }
291
cxgbi_sock_flag(struct cxgbi_sock * csk,enum cxgbi_sock_flags flag)292 static inline int cxgbi_sock_flag(struct cxgbi_sock *csk,
293 enum cxgbi_sock_flags flag)
294 {
295 if (csk == NULL)
296 return 0;
297 return test_bit(flag, &csk->flags);
298 }
299
cxgbi_sock_set_state(struct cxgbi_sock * csk,int state)300 static inline void cxgbi_sock_set_state(struct cxgbi_sock *csk, int state)
301 {
302 log_debug(1 << CXGBI_DBG_SOCK,
303 "csk 0x%p,%u,0x%lx, state -> %u.\n",
304 csk, csk->state, csk->flags, state);
305 csk->state = state;
306 }
307
cxgbi_sock_free(struct kref * kref)308 static inline void cxgbi_sock_free(struct kref *kref)
309 {
310 struct cxgbi_sock *csk = container_of(kref,
311 struct cxgbi_sock,
312 refcnt);
313 if (csk) {
314 log_debug(1 << CXGBI_DBG_SOCK,
315 "free csk 0x%p, state %u, flags 0x%lx\n",
316 csk, csk->state, csk->flags);
317 kfree(csk);
318 }
319 }
320
__cxgbi_sock_put(const char * fn,struct cxgbi_sock * csk)321 static inline void __cxgbi_sock_put(const char *fn, struct cxgbi_sock *csk)
322 {
323 log_debug(1 << CXGBI_DBG_SOCK,
324 "%s, put csk 0x%p, ref %u-1.\n",
325 fn, csk, kref_read(&csk->refcnt));
326 kref_put(&csk->refcnt, cxgbi_sock_free);
327 }
328 #define cxgbi_sock_put(csk) __cxgbi_sock_put(__func__, csk)
329
__cxgbi_sock_get(const char * fn,struct cxgbi_sock * csk)330 static inline void __cxgbi_sock_get(const char *fn, struct cxgbi_sock *csk)
331 {
332 log_debug(1 << CXGBI_DBG_SOCK,
333 "%s, get csk 0x%p, ref %u+1.\n",
334 fn, csk, kref_read(&csk->refcnt));
335 kref_get(&csk->refcnt);
336 }
337 #define cxgbi_sock_get(csk) __cxgbi_sock_get(__func__, csk)
338
cxgbi_sock_is_closing(struct cxgbi_sock * csk)339 static inline int cxgbi_sock_is_closing(struct cxgbi_sock *csk)
340 {
341 return csk->state >= CTP_ACTIVE_CLOSE;
342 }
343
cxgbi_sock_is_established(struct cxgbi_sock * csk)344 static inline int cxgbi_sock_is_established(struct cxgbi_sock *csk)
345 {
346 return csk->state == CTP_ESTABLISHED;
347 }
348
cxgbi_sock_purge_write_queue(struct cxgbi_sock * csk)349 static inline void cxgbi_sock_purge_write_queue(struct cxgbi_sock *csk)
350 {
351 struct sk_buff *skb;
352
353 while ((skb = __skb_dequeue(&csk->write_queue)))
354 __kfree_skb(skb);
355 }
356
cxgbi_sock_compute_wscale(unsigned int win)357 static inline unsigned int cxgbi_sock_compute_wscale(unsigned int win)
358 {
359 unsigned int wscale = 0;
360
361 while (wscale < 14 && (65535 << wscale) < win)
362 wscale++;
363 return wscale;
364 }
365
alloc_wr(int wrlen,int dlen,gfp_t gfp)366 static inline struct sk_buff *alloc_wr(int wrlen, int dlen, gfp_t gfp)
367 {
368 struct sk_buff *skb = alloc_skb(wrlen + dlen, gfp);
369
370 if (skb) {
371 __skb_put(skb, wrlen);
372 memset(skb->head, 0, wrlen + dlen);
373 } else
374 pr_info("alloc cpl wr skb %u+%u, OOM.\n", wrlen, dlen);
375 return skb;
376 }
377
378
379 /*
380 * The number of WRs needed for an skb depends on the number of fragments
381 * in the skb and whether it has any payload in its main body. This maps the
382 * length of the gather list represented by an skb into the # of necessary WRs.
383 * The extra two fragments are for iscsi bhs and payload padding.
384 */
385 #define SKB_WR_LIST_SIZE (MAX_SKB_FRAGS + 2)
386
cxgbi_sock_reset_wr_list(struct cxgbi_sock * csk)387 static inline void cxgbi_sock_reset_wr_list(struct cxgbi_sock *csk)
388 {
389 csk->wr_pending_head = csk->wr_pending_tail = NULL;
390 }
391
cxgbi_sock_enqueue_wr(struct cxgbi_sock * csk,struct sk_buff * skb)392 static inline void cxgbi_sock_enqueue_wr(struct cxgbi_sock *csk,
393 struct sk_buff *skb)
394 {
395 cxgbi_skcb_tx_wr_next(skb) = NULL;
396 /*
397 * We want to take an extra reference since both us and the driver
398 * need to free the packet before it's really freed.
399 */
400 skb_get(skb);
401
402 if (!csk->wr_pending_head)
403 csk->wr_pending_head = skb;
404 else
405 cxgbi_skcb_tx_wr_next(csk->wr_pending_tail) = skb;
406 csk->wr_pending_tail = skb;
407 }
408
cxgbi_sock_count_pending_wrs(const struct cxgbi_sock * csk)409 static inline int cxgbi_sock_count_pending_wrs(const struct cxgbi_sock *csk)
410 {
411 int n = 0;
412 const struct sk_buff *skb = csk->wr_pending_head;
413
414 while (skb) {
415 n += skb->csum;
416 skb = cxgbi_skcb_tx_wr_next(skb);
417 }
418 return n;
419 }
420
cxgbi_sock_peek_wr(const struct cxgbi_sock * csk)421 static inline struct sk_buff *cxgbi_sock_peek_wr(const struct cxgbi_sock *csk)
422 {
423 return csk->wr_pending_head;
424 }
425
cxgbi_sock_dequeue_wr(struct cxgbi_sock * csk)426 static inline struct sk_buff *cxgbi_sock_dequeue_wr(struct cxgbi_sock *csk)
427 {
428 struct sk_buff *skb = csk->wr_pending_head;
429
430 if (likely(skb)) {
431 csk->wr_pending_head = cxgbi_skcb_tx_wr_next(skb);
432 cxgbi_skcb_tx_wr_next(skb) = NULL;
433 }
434 return skb;
435 }
436
437 void cxgbi_sock_check_wr_invariants(const struct cxgbi_sock *);
438 void cxgbi_sock_purge_wr_queue(struct cxgbi_sock *);
439 void cxgbi_sock_skb_entail(struct cxgbi_sock *, struct sk_buff *);
440 void cxgbi_sock_fail_act_open(struct cxgbi_sock *, int);
441 void cxgbi_sock_act_open_req_arp_failure(void *, struct sk_buff *);
442 void cxgbi_sock_closed(struct cxgbi_sock *);
443 void cxgbi_sock_established(struct cxgbi_sock *, unsigned int, unsigned int);
444 void cxgbi_sock_rcv_abort_rpl(struct cxgbi_sock *);
445 void cxgbi_sock_rcv_peer_close(struct cxgbi_sock *);
446 void cxgbi_sock_rcv_close_conn_rpl(struct cxgbi_sock *, u32);
447 void cxgbi_sock_rcv_wr_ack(struct cxgbi_sock *, unsigned int, unsigned int,
448 int);
449 unsigned int cxgbi_sock_select_mss(struct cxgbi_sock *, unsigned int);
450 void cxgbi_sock_free_cpl_skbs(struct cxgbi_sock *);
451
452 struct cxgbi_hba {
453 struct net_device *ndev;
454 struct net_device *vdev; /* vlan dev */
455 struct Scsi_Host *shost;
456 struct cxgbi_device *cdev;
457 __be32 ipv4addr;
458 unsigned char port_id;
459 };
460
461 struct cxgbi_ports_map {
462 unsigned int max_connect;
463 unsigned int used;
464 unsigned short sport_base;
465 spinlock_t lock;
466 unsigned int next;
467 struct cxgbi_sock **port_csk;
468 };
469
470 #define CXGBI_FLAG_DEV_T3 0x1
471 #define CXGBI_FLAG_DEV_T4 0x2
472 #define CXGBI_FLAG_ADAPTER_RESET 0x4
473 #define CXGBI_FLAG_IPV4_SET 0x10
474 #define CXGBI_FLAG_USE_PPOD_OFLDQ 0x40
475 #define CXGBI_FLAG_DDP_OFF 0x100
476 #define CXGBI_FLAG_DEV_ISO_OFF 0x400
477
478 struct cxgbi_device {
479 struct list_head list_head;
480 struct list_head rcu_node;
481 unsigned int flags;
482 struct net_device **ports;
483 void *lldev;
484 struct cxgbi_hba **hbas;
485 const unsigned short *mtus;
486 unsigned char nmtus;
487 unsigned char nports;
488 struct pci_dev *pdev;
489 struct dentry *debugfs_root;
490 struct iscsi_transport *itp;
491 struct module *owner;
492
493 unsigned int pfvf;
494 unsigned int rx_credit_thres;
495 unsigned int skb_tx_rsvd;
496 u32 skb_iso_txhdr;
497 unsigned int skb_rx_extra; /* for msg coalesced mode */
498 unsigned int tx_max_size;
499 unsigned int rx_max_size;
500 unsigned int rxq_idx_cntr;
501 struct cxgbi_ports_map pmap;
502
503 void (*dev_ddp_cleanup)(struct cxgbi_device *);
504 struct cxgbi_ppm* (*cdev2ppm)(struct cxgbi_device *);
505 int (*csk_ddp_set_map)(struct cxgbi_ppm *, struct cxgbi_sock *,
506 struct cxgbi_task_tag_info *);
507 void (*csk_ddp_clear_map)(struct cxgbi_device *cdev,
508 struct cxgbi_ppm *,
509 struct cxgbi_task_tag_info *);
510 int (*csk_ddp_setup_digest)(struct cxgbi_sock *,
511 unsigned int, int, int);
512 int (*csk_ddp_setup_pgidx)(struct cxgbi_sock *,
513 unsigned int, int);
514
515 void (*csk_release_offload_resources)(struct cxgbi_sock *);
516 int (*csk_rx_pdu_ready)(struct cxgbi_sock *, struct sk_buff *);
517 u32 (*csk_send_rx_credits)(struct cxgbi_sock *, u32);
518 int (*csk_push_tx_frames)(struct cxgbi_sock *, int);
519 void (*csk_send_abort_req)(struct cxgbi_sock *);
520 void (*csk_send_close_req)(struct cxgbi_sock *);
521 int (*csk_alloc_cpls)(struct cxgbi_sock *);
522 int (*csk_init_act_open)(struct cxgbi_sock *);
523
524 void *dd_data;
525 };
526 #define cxgbi_cdev_priv(cdev) ((cdev)->dd_data)
527
528 struct cxgbi_conn {
529 struct cxgbi_endpoint *cep;
530 struct iscsi_conn *iconn;
531 struct cxgbi_hba *chba;
532 u32 task_idx_bits;
533 unsigned int ddp_full;
534 unsigned int ddp_tag_full;
535 };
536
537 struct cxgbi_endpoint {
538 struct cxgbi_conn *cconn;
539 struct cxgbi_hba *chba;
540 struct cxgbi_sock *csk;
541 };
542
543 struct cxgbi_task_data {
544 #define CXGBI_TASK_SGL_CHECKED 0x1
545 #define CXGBI_TASK_SGL_COPY 0x2
546 u8 flags;
547 unsigned short nr_frags;
548 struct page_frag frags[MAX_SKB_FRAGS];
549 struct sk_buff *skb;
550 unsigned int dlen;
551 unsigned int offset;
552 unsigned int count;
553 unsigned int sgoffset;
554 u32 total_count;
555 u32 total_offset;
556 u32 max_xmit_dlength;
557 struct cxgbi_task_tag_info ttinfo;
558 };
559 #define iscsi_task_cxgbi_data(task) \
560 ((task)->dd_data + sizeof(struct iscsi_tcp_task))
561
562 struct cxgbi_iso_info {
563 #define CXGBI_ISO_INFO_FSLICE 0x1
564 #define CXGBI_ISO_INFO_LSLICE 0x2
565 #define CXGBI_ISO_INFO_IMM_ENABLE 0x4
566 u8 flags;
567 u8 op;
568 u8 ahs;
569 u8 num_pdu;
570 u32 mpdu;
571 u32 burst_size;
572 u32 len;
573 u32 segment_offset;
574 u32 datasn_offset;
575 u32 buffer_offset;
576 };
577
cxgbi_set_iscsi_ipv4(struct cxgbi_hba * chba,__be32 ipaddr)578 static inline void cxgbi_set_iscsi_ipv4(struct cxgbi_hba *chba, __be32 ipaddr)
579 {
580 if (chba->cdev->flags & CXGBI_FLAG_IPV4_SET)
581 chba->ipv4addr = ipaddr;
582 else
583 pr_info("set iscsi ipv4 NOT supported, using %s ipv4.\n",
584 chba->ndev->name);
585 }
586
587 struct cxgbi_device *cxgbi_device_register(unsigned int, unsigned int);
588 void cxgbi_device_unregister(struct cxgbi_device *);
589 void cxgbi_device_unregister_all(unsigned int flag);
590 struct cxgbi_device *cxgbi_device_find_by_lldev(void *);
591 struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *, int *);
592 struct cxgbi_device *cxgbi_device_find_by_netdev_rcu(struct net_device *,
593 int *);
594 int cxgbi_hbas_add(struct cxgbi_device *, u64, unsigned int,
595 struct scsi_host_template *,
596 struct scsi_transport_template *);
597 void cxgbi_hbas_remove(struct cxgbi_device *);
598
599 int cxgbi_device_portmap_create(struct cxgbi_device *cdev, unsigned int base,
600 unsigned int max_conn);
601 void cxgbi_device_portmap_cleanup(struct cxgbi_device *cdev);
602
603 void cxgbi_conn_tx_open(struct cxgbi_sock *);
604 void cxgbi_conn_pdu_ready(struct cxgbi_sock *);
605 int cxgbi_conn_alloc_pdu(struct iscsi_task *, u8);
606 int cxgbi_conn_init_pdu(struct iscsi_task *, unsigned int , unsigned int);
607 int cxgbi_conn_xmit_pdu(struct iscsi_task *);
608
609 void cxgbi_cleanup_task(struct iscsi_task *task);
610
611 umode_t cxgbi_attr_is_visible(int param_type, int param);
612 void cxgbi_get_conn_stats(struct iscsi_cls_conn *, struct iscsi_stats *);
613 int cxgbi_set_conn_param(struct iscsi_cls_conn *,
614 enum iscsi_param, char *, int);
615 int cxgbi_get_ep_param(struct iscsi_endpoint *ep, enum iscsi_param, char *);
616 struct iscsi_cls_conn *cxgbi_create_conn(struct iscsi_cls_session *, u32);
617 int cxgbi_bind_conn(struct iscsi_cls_session *,
618 struct iscsi_cls_conn *, u64, int);
619 void cxgbi_destroy_session(struct iscsi_cls_session *);
620 struct iscsi_cls_session *cxgbi_create_session(struct iscsi_endpoint *,
621 u16, u16, u32);
622 int cxgbi_set_host_param(struct Scsi_Host *,
623 enum iscsi_host_param, char *, int);
624 int cxgbi_get_host_param(struct Scsi_Host *, enum iscsi_host_param, char *);
625 struct iscsi_endpoint *cxgbi_ep_connect(struct Scsi_Host *,
626 struct sockaddr *, int);
627 int cxgbi_ep_poll(struct iscsi_endpoint *, int);
628 void cxgbi_ep_disconnect(struct iscsi_endpoint *);
629
630 int cxgbi_iscsi_init(struct iscsi_transport *,
631 struct scsi_transport_template **);
632 void cxgbi_iscsi_cleanup(struct iscsi_transport *,
633 struct scsi_transport_template **);
634 void cxgbi_parse_pdu_itt(struct iscsi_conn *, itt_t, int *, int *);
635 int cxgbi_ddp_init(struct cxgbi_device *, unsigned int, unsigned int,
636 unsigned int, unsigned int);
637 int cxgbi_ddp_cleanup(struct cxgbi_device *);
638 void cxgbi_ddp_page_size_factor(int *);
639 void cxgbi_ddp_set_one_ppod(struct cxgbi_pagepod *,
640 struct cxgbi_task_tag_info *,
641 struct scatterlist **sg_pp, unsigned int *sg_off);
642 int cxgbi_ddp_ppm_setup(void **ppm_pp, struct cxgbi_device *cdev,
643 struct cxgbi_tag_format *tformat,
644 unsigned int iscsi_size, unsigned int llimit,
645 unsigned int start, unsigned int rsvd_factor,
646 unsigned int edram_start, unsigned int edram_size);
647 #endif /*__LIBCXGBI_H__*/
648