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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
33enum 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...) \
52do { \
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
60#define CXGBI_MAX_CONN 16384
61
62
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
67
68
69
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
80
81
82
83
84static const unsigned int ulp2_extra_len[] = { 0, 4, 4, 8 };
85static inline unsigned int cxgbi_ulp_extra_len(int submode)
86{
87 return ulp2_extra_len[submode & 3];
88}
89
90#define CPL_RX_DDP_STATUS_DDP_SHIFT 16
91#define CPL_RX_DDP_STATUS_PAD_SHIFT 19
92#define CPL_RX_DDP_STATUS_HCRC_SHIFT 20
93#define CPL_RX_DDP_STATUS_DCRC_SHIFT 21
94
95
96
97
98
99
100struct sge_opaque_hdr {
101 void *dev;
102 dma_addr_t addr[MAX_SKB_FRAGS + 1];
103};
104
105struct cxgbi_sock {
106 struct cxgbi_device *cdev;
107
108 int tid;
109 int atid;
110 unsigned long flags;
111 unsigned int mtu;
112 unsigned short rss_qid;
113 unsigned short txq_idx;
114 unsigned short advmss;
115 unsigned int tx_chan;
116 unsigned int rx_chan;
117 unsigned int mss_idx;
118 unsigned int smac_idx;
119 unsigned char port_id;
120 int wr_max_cred;
121 int wr_cred;
122 int wr_una_cred;
123 unsigned char hcrc_len;
124 unsigned char dcrc_len;
125
126 void *l2t;
127 struct sk_buff *wr_pending_head;
128 struct sk_buff *wr_pending_tail;
129 struct sk_buff *cpl_close;
130 struct sk_buff *cpl_abort_req;
131 struct sk_buff *cpl_abort_rpl;
132 struct sk_buff *skb_ulp_lhdr;
133 spinlock_t lock;
134 struct kref refcnt;
135 unsigned int state;
136 unsigned int csk_family;
137 union {
138 struct sockaddr_in saddr;
139 struct sockaddr_in6 saddr6;
140 };
141 union {
142 struct sockaddr_in daddr;
143 struct sockaddr_in6 daddr6;
144 };
145 struct dst_entry *dst;
146 struct sk_buff_head receive_queue;
147 struct sk_buff_head write_queue;
148 struct timer_list retry_timer;
149 int err;
150 rwlock_t callback_lock;
151 void *user_data;
152
153 u32 rcv_nxt;
154 u32 copied_seq;
155 u32 rcv_wup;
156 u32 snd_nxt;
157 u32 snd_una;
158 u32 write_seq;
159 u32 snd_win;
160 u32 rcv_win;
161};
162
163
164
165
166enum cxgbi_sock_states{
167 CTP_CLOSED,
168 CTP_CONNECTING,
169 CTP_ACTIVE_OPEN,
170 CTP_ESTABLISHED,
171 CTP_ACTIVE_CLOSE,
172 CTP_PASSIVE_CLOSE,
173 CTP_CLOSE_WAIT_1,
174 CTP_CLOSE_WAIT_2,
175 CTP_ABORTING,
176};
177
178
179
180
181enum cxgbi_sock_flags {
182 CTPF_ABORT_RPL_RCVD,
183 CTPF_ABORT_REQ_RCVD,
184 CTPF_ABORT_RPL_PENDING,
185 CTPF_TX_DATA_SENT,
186 CTPF_ACTIVE_CLOSE_NEEDED,
187 CTPF_HAS_ATID,
188 CTPF_HAS_TID,
189 CTPF_OFFLOAD_DOWN,
190 CTPF_LOGOUT_RSP_RCVD,
191};
192
193struct cxgbi_skb_rx_cb {
194 __u32 ddigest;
195 __u32 pdulen;
196};
197
198struct cxgbi_skb_tx_cb {
199 void *handle;
200 void *arp_err_handler;
201 struct sk_buff *wr_next;
202};
203
204enum cxgbi_skcb_flags {
205 SKCBF_TX_NEED_HDR,
206 SKCBF_TX_MEM_WRITE,
207 SKCBF_TX_FLAG_COMPL,
208 SKCBF_TX_DONE,
209 SKCBF_RX_COALESCED,
210 SKCBF_RX_HDR,
211 SKCBF_RX_DATA,
212 SKCBF_RX_STATUS,
213 SKCBF_RX_ISCSI_COMPL,
214 SKCBF_RX_DATA_DDPD,
215 SKCBF_RX_HCRC_ERR,
216 SKCBF_RX_DCRC_ERR,
217 SKCBF_RX_PAD_ERR,
218};
219
220struct cxgbi_skb_cb {
221 union {
222 struct cxgbi_skb_rx_cb rx;
223 struct cxgbi_skb_tx_cb tx;
224 };
225 unsigned char ulp_mode;
226 unsigned long flags;
227 unsigned int seq;
228};
229
230#define CXGBI_SKB_CB(skb) ((struct cxgbi_skb_cb *)&((skb)->cb[0]))
231#define cxgbi_skcb_flags(skb) (CXGBI_SKB_CB(skb)->flags)
232#define cxgbi_skcb_ulp_mode(skb) (CXGBI_SKB_CB(skb)->ulp_mode)
233#define cxgbi_skcb_tcp_seq(skb) (CXGBI_SKB_CB(skb)->seq)
234#define cxgbi_skcb_rx_ddigest(skb) (CXGBI_SKB_CB(skb)->rx.ddigest)
235#define cxgbi_skcb_rx_pdulen(skb) (CXGBI_SKB_CB(skb)->rx.pdulen)
236#define cxgbi_skcb_tx_wr_next(skb) (CXGBI_SKB_CB(skb)->tx.wr_next)
237
238static inline void cxgbi_skcb_set_flag(struct sk_buff *skb,
239 enum cxgbi_skcb_flags flag)
240{
241 __set_bit(flag, &(cxgbi_skcb_flags(skb)));
242}
243
244static inline void cxgbi_skcb_clear_flag(struct sk_buff *skb,
245 enum cxgbi_skcb_flags flag)
246{
247 __clear_bit(flag, &(cxgbi_skcb_flags(skb)));
248}
249
250static inline int cxgbi_skcb_test_flag(const struct sk_buff *skb,
251 enum cxgbi_skcb_flags flag)
252{
253 return test_bit(flag, &(cxgbi_skcb_flags(skb)));
254}
255
256static inline void cxgbi_sock_set_flag(struct cxgbi_sock *csk,
257 enum cxgbi_sock_flags flag)
258{
259 __set_bit(flag, &csk->flags);
260 log_debug(1 << CXGBI_DBG_SOCK,
261 "csk 0x%p,%u,0x%lx, bit %d.\n",
262 csk, csk->state, csk->flags, flag);
263}
264
265static inline void cxgbi_sock_clear_flag(struct cxgbi_sock *csk,
266 enum cxgbi_sock_flags flag)
267{
268 __clear_bit(flag, &csk->flags);
269 log_debug(1 << CXGBI_DBG_SOCK,
270 "csk 0x%p,%u,0x%lx, bit %d.\n",
271 csk, csk->state, csk->flags, flag);
272}
273
274static inline int cxgbi_sock_flag(struct cxgbi_sock *csk,
275 enum cxgbi_sock_flags flag)
276{
277 if (csk == NULL)
278 return 0;
279 return test_bit(flag, &csk->flags);
280}
281
282static inline void cxgbi_sock_set_state(struct cxgbi_sock *csk, int state)
283{
284 log_debug(1 << CXGBI_DBG_SOCK,
285 "csk 0x%p,%u,0x%lx, state -> %u.\n",
286 csk, csk->state, csk->flags, state);
287 csk->state = state;
288}
289
290static inline void cxgbi_sock_free(struct kref *kref)
291{
292 struct cxgbi_sock *csk = container_of(kref,
293 struct cxgbi_sock,
294 refcnt);
295 if (csk) {
296 log_debug(1 << CXGBI_DBG_SOCK,
297 "free csk 0x%p, state %u, flags 0x%lx\n",
298 csk, csk->state, csk->flags);
299 kfree(csk);
300 }
301}
302
303static inline void __cxgbi_sock_put(const char *fn, struct cxgbi_sock *csk)
304{
305 log_debug(1 << CXGBI_DBG_SOCK,
306 "%s, put csk 0x%p, ref %u-1.\n",
307 fn, csk, kref_read(&csk->refcnt));
308 kref_put(&csk->refcnt, cxgbi_sock_free);
309}
310#define cxgbi_sock_put(csk) __cxgbi_sock_put(__func__, csk)
311
312static inline void __cxgbi_sock_get(const char *fn, struct cxgbi_sock *csk)
313{
314 log_debug(1 << CXGBI_DBG_SOCK,
315 "%s, get csk 0x%p, ref %u+1.\n",
316 fn, csk, kref_read(&csk->refcnt));
317 kref_get(&csk->refcnt);
318}
319#define cxgbi_sock_get(csk) __cxgbi_sock_get(__func__, csk)
320
321static inline int cxgbi_sock_is_closing(struct cxgbi_sock *csk)
322{
323 return csk->state >= CTP_ACTIVE_CLOSE;
324}
325
326static inline int cxgbi_sock_is_established(struct cxgbi_sock *csk)
327{
328 return csk->state == CTP_ESTABLISHED;
329}
330
331static inline void cxgbi_sock_purge_write_queue(struct cxgbi_sock *csk)
332{
333 struct sk_buff *skb;
334
335 while ((skb = __skb_dequeue(&csk->write_queue)))
336 __kfree_skb(skb);
337}
338
339static inline unsigned int cxgbi_sock_compute_wscale(unsigned int win)
340{
341 unsigned int wscale = 0;
342
343 while (wscale < 14 && (65535 << wscale) < win)
344 wscale++;
345 return wscale;
346}
347
348static inline struct sk_buff *alloc_wr(int wrlen, int dlen, gfp_t gfp)
349{
350 struct sk_buff *skb = alloc_skb(wrlen + dlen, gfp);
351
352 if (skb) {
353 __skb_put(skb, wrlen);
354 memset(skb->head, 0, wrlen + dlen);
355 } else
356 pr_info("alloc cpl wr skb %u+%u, OOM.\n", wrlen, dlen);
357 return skb;
358}
359
360
361
362
363
364
365
366
367#define SKB_WR_LIST_SIZE (MAX_SKB_FRAGS + 2)
368
369static inline void cxgbi_sock_reset_wr_list(struct cxgbi_sock *csk)
370{
371 csk->wr_pending_head = csk->wr_pending_tail = NULL;
372}
373
374static inline void cxgbi_sock_enqueue_wr(struct cxgbi_sock *csk,
375 struct sk_buff *skb)
376{
377 cxgbi_skcb_tx_wr_next(skb) = NULL;
378
379
380
381
382 skb_get(skb);
383
384 if (!csk->wr_pending_head)
385 csk->wr_pending_head = skb;
386 else
387 cxgbi_skcb_tx_wr_next(csk->wr_pending_tail) = skb;
388 csk->wr_pending_tail = skb;
389}
390
391static inline int cxgbi_sock_count_pending_wrs(const struct cxgbi_sock *csk)
392{
393 int n = 0;
394 const struct sk_buff *skb = csk->wr_pending_head;
395
396 while (skb) {
397 n += skb->csum;
398 skb = cxgbi_skcb_tx_wr_next(skb);
399 }
400 return n;
401}
402
403static inline struct sk_buff *cxgbi_sock_peek_wr(const struct cxgbi_sock *csk)
404{
405 return csk->wr_pending_head;
406}
407
408static inline struct sk_buff *cxgbi_sock_dequeue_wr(struct cxgbi_sock *csk)
409{
410 struct sk_buff *skb = csk->wr_pending_head;
411
412 if (likely(skb)) {
413 csk->wr_pending_head = cxgbi_skcb_tx_wr_next(skb);
414 cxgbi_skcb_tx_wr_next(skb) = NULL;
415 }
416 return skb;
417}
418
419void cxgbi_sock_check_wr_invariants(const struct cxgbi_sock *);
420void cxgbi_sock_purge_wr_queue(struct cxgbi_sock *);
421void cxgbi_sock_skb_entail(struct cxgbi_sock *, struct sk_buff *);
422void cxgbi_sock_fail_act_open(struct cxgbi_sock *, int);
423void cxgbi_sock_act_open_req_arp_failure(void *, struct sk_buff *);
424void cxgbi_sock_closed(struct cxgbi_sock *);
425void cxgbi_sock_established(struct cxgbi_sock *, unsigned int, unsigned int);
426void cxgbi_sock_rcv_abort_rpl(struct cxgbi_sock *);
427void cxgbi_sock_rcv_peer_close(struct cxgbi_sock *);
428void cxgbi_sock_rcv_close_conn_rpl(struct cxgbi_sock *, u32);
429void cxgbi_sock_rcv_wr_ack(struct cxgbi_sock *, unsigned int, unsigned int,
430 int);
431unsigned int cxgbi_sock_select_mss(struct cxgbi_sock *, unsigned int);
432void cxgbi_sock_free_cpl_skbs(struct cxgbi_sock *);
433
434struct cxgbi_hba {
435 struct net_device *ndev;
436 struct net_device *vdev;
437 struct Scsi_Host *shost;
438 struct cxgbi_device *cdev;
439 __be32 ipv4addr;
440 unsigned char port_id;
441};
442
443struct cxgbi_ports_map {
444 unsigned int max_connect;
445 unsigned int used;
446 unsigned short sport_base;
447 spinlock_t lock;
448 unsigned int next;
449 struct cxgbi_sock **port_csk;
450};
451
452#define CXGBI_FLAG_DEV_T3 0x1
453#define CXGBI_FLAG_DEV_T4 0x2
454#define CXGBI_FLAG_ADAPTER_RESET 0x4
455#define CXGBI_FLAG_IPV4_SET 0x10
456#define CXGBI_FLAG_USE_PPOD_OFLDQ 0x40
457#define CXGBI_FLAG_DDP_OFF 0x100
458
459struct cxgbi_device {
460 struct list_head list_head;
461 struct list_head rcu_node;
462 unsigned int flags;
463 struct net_device **ports;
464 void *lldev;
465 struct cxgbi_hba **hbas;
466 const unsigned short *mtus;
467 unsigned char nmtus;
468 unsigned char nports;
469 struct pci_dev *pdev;
470 struct dentry *debugfs_root;
471 struct iscsi_transport *itp;
472 struct module *owner;
473
474 unsigned int pfvf;
475 unsigned int rx_credit_thres;
476 unsigned int skb_tx_rsvd;
477 unsigned int skb_rx_extra;
478 unsigned int tx_max_size;
479 unsigned int rx_max_size;
480 unsigned int rxq_idx_cntr;
481 struct cxgbi_ports_map pmap;
482
483 void (*dev_ddp_cleanup)(struct cxgbi_device *);
484 struct cxgbi_ppm* (*cdev2ppm)(struct cxgbi_device *);
485 int (*csk_ddp_set_map)(struct cxgbi_ppm *, struct cxgbi_sock *,
486 struct cxgbi_task_tag_info *);
487 void (*csk_ddp_clear_map)(struct cxgbi_device *cdev,
488 struct cxgbi_ppm *,
489 struct cxgbi_task_tag_info *);
490 int (*csk_ddp_setup_digest)(struct cxgbi_sock *,
491 unsigned int, int, int, int);
492 int (*csk_ddp_setup_pgidx)(struct cxgbi_sock *,
493 unsigned int, int, bool);
494
495 void (*csk_release_offload_resources)(struct cxgbi_sock *);
496 int (*csk_rx_pdu_ready)(struct cxgbi_sock *, struct sk_buff *);
497 u32 (*csk_send_rx_credits)(struct cxgbi_sock *, u32);
498 int (*csk_push_tx_frames)(struct cxgbi_sock *, int);
499 void (*csk_send_abort_req)(struct cxgbi_sock *);
500 void (*csk_send_close_req)(struct cxgbi_sock *);
501 int (*csk_alloc_cpls)(struct cxgbi_sock *);
502 int (*csk_init_act_open)(struct cxgbi_sock *);
503
504 void *dd_data;
505};
506#define cxgbi_cdev_priv(cdev) ((cdev)->dd_data)
507
508struct cxgbi_conn {
509 struct cxgbi_endpoint *cep;
510 struct iscsi_conn *iconn;
511 struct cxgbi_hba *chba;
512 u32 task_idx_bits;
513 unsigned int ddp_full;
514 unsigned int ddp_tag_full;
515};
516
517struct cxgbi_endpoint {
518 struct cxgbi_conn *cconn;
519 struct cxgbi_hba *chba;
520 struct cxgbi_sock *csk;
521};
522
523#define MAX_PDU_FRAGS ((ULP2_MAX_PDU_PAYLOAD + 512 - 1) / 512)
524struct cxgbi_task_data {
525 unsigned short nr_frags;
526 struct page_frag frags[MAX_PDU_FRAGS];
527 struct sk_buff *skb;
528 unsigned int dlen;
529 unsigned int offset;
530 unsigned int count;
531 unsigned int sgoffset;
532 struct cxgbi_task_tag_info ttinfo;
533};
534#define iscsi_task_cxgbi_data(task) \
535 ((task)->dd_data + sizeof(struct iscsi_tcp_task))
536
537static inline void *cxgbi_alloc_big_mem(unsigned int size,
538 gfp_t gfp)
539{
540 void *p = kzalloc(size, gfp | __GFP_NOWARN);
541
542 if (!p)
543 p = vzalloc(size);
544
545 return p;
546}
547
548static inline void cxgbi_free_big_mem(void *addr)
549{
550 kvfree(addr);
551}
552
553static inline void cxgbi_set_iscsi_ipv4(struct cxgbi_hba *chba, __be32 ipaddr)
554{
555 if (chba->cdev->flags & CXGBI_FLAG_IPV4_SET)
556 chba->ipv4addr = ipaddr;
557 else
558 pr_info("set iscsi ipv4 NOT supported, using %s ipv4.\n",
559 chba->ndev->name);
560}
561
562struct cxgbi_device *cxgbi_device_register(unsigned int, unsigned int);
563void cxgbi_device_unregister(struct cxgbi_device *);
564void cxgbi_device_unregister_all(unsigned int flag);
565struct cxgbi_device *cxgbi_device_find_by_lldev(void *);
566struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *, int *);
567struct cxgbi_device *cxgbi_device_find_by_netdev_rcu(struct net_device *,
568 int *);
569int cxgbi_hbas_add(struct cxgbi_device *, u64, unsigned int,
570 struct scsi_host_template *,
571 struct scsi_transport_template *);
572void cxgbi_hbas_remove(struct cxgbi_device *);
573
574int cxgbi_device_portmap_create(struct cxgbi_device *cdev, unsigned int base,
575 unsigned int max_conn);
576void cxgbi_device_portmap_cleanup(struct cxgbi_device *cdev);
577
578void cxgbi_conn_tx_open(struct cxgbi_sock *);
579void cxgbi_conn_pdu_ready(struct cxgbi_sock *);
580int cxgbi_conn_alloc_pdu(struct iscsi_task *, u8);
581int cxgbi_conn_init_pdu(struct iscsi_task *, unsigned int , unsigned int);
582int cxgbi_conn_xmit_pdu(struct iscsi_task *);
583
584void cxgbi_cleanup_task(struct iscsi_task *task);
585
586umode_t cxgbi_attr_is_visible(int param_type, int param);
587void cxgbi_get_conn_stats(struct iscsi_cls_conn *, struct iscsi_stats *);
588int cxgbi_set_conn_param(struct iscsi_cls_conn *,
589 enum iscsi_param, char *, int);
590int cxgbi_get_ep_param(struct iscsi_endpoint *ep, enum iscsi_param, char *);
591struct iscsi_cls_conn *cxgbi_create_conn(struct iscsi_cls_session *, u32);
592int cxgbi_bind_conn(struct iscsi_cls_session *,
593 struct iscsi_cls_conn *, u64, int);
594void cxgbi_destroy_session(struct iscsi_cls_session *);
595struct iscsi_cls_session *cxgbi_create_session(struct iscsi_endpoint *,
596 u16, u16, u32);
597int cxgbi_set_host_param(struct Scsi_Host *,
598 enum iscsi_host_param, char *, int);
599int cxgbi_get_host_param(struct Scsi_Host *, enum iscsi_host_param, char *);
600struct iscsi_endpoint *cxgbi_ep_connect(struct Scsi_Host *,
601 struct sockaddr *, int);
602int cxgbi_ep_poll(struct iscsi_endpoint *, int);
603void cxgbi_ep_disconnect(struct iscsi_endpoint *);
604
605int cxgbi_iscsi_init(struct iscsi_transport *,
606 struct scsi_transport_template **);
607void cxgbi_iscsi_cleanup(struct iscsi_transport *,
608 struct scsi_transport_template **);
609void cxgbi_parse_pdu_itt(struct iscsi_conn *, itt_t, int *, int *);
610int cxgbi_ddp_init(struct cxgbi_device *, unsigned int, unsigned int,
611 unsigned int, unsigned int);
612int cxgbi_ddp_cleanup(struct cxgbi_device *);
613void cxgbi_ddp_page_size_factor(int *);
614void cxgbi_ddp_set_one_ppod(struct cxgbi_pagepod *,
615 struct cxgbi_task_tag_info *,
616 struct scatterlist **sg_pp, unsigned int *sg_off);
617void cxgbi_ddp_ppm_setup(void **ppm_pp, struct cxgbi_device *,
618 struct cxgbi_tag_format *, unsigned int ppmax,
619 unsigned int llimit, unsigned int start,
620 unsigned int rsvd_factor);
621#endif
622