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9ba682f0 | 1 | /* |
2 | * libcxgbi.h: Chelsio common library for T3/T4 iSCSI driver. | |
3 | * | |
4 | * Copyright (c) 2010 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 <scsi/scsi_device.h> | |
28 | #include <scsi/libiscsi_tcp.h> | |
29 | ||
30 | enum cxgbi_dbg_flag { | |
31 | CXGBI_DBG_ISCSI, | |
32 | CXGBI_DBG_DDP, | |
33 | CXGBI_DBG_TOE, | |
34 | CXGBI_DBG_SOCK, | |
35 | ||
36 | CXGBI_DBG_PDU_TX, | |
37 | CXGBI_DBG_PDU_RX, | |
38 | CXGBI_DBG_DEV, | |
39 | }; | |
40 | ||
41 | #define log_debug(level, fmt, ...) \ | |
42 | do { \ | |
43 | if (dbg_level & (level)) \ | |
44 | pr_info(fmt, ##__VA_ARGS__); \ | |
45 | } while (0) | |
46 | ||
fc8d0590 AB |
47 | #define pr_info_ipaddr(fmt_trail, \ |
48 | addr1, addr2, args_trail...) \ | |
49 | do { \ | |
50 | if (!((1 << CXGBI_DBG_SOCK) & dbg_level)) \ | |
51 | break; \ | |
52 | pr_info("%pISpc - %pISpc, " fmt_trail, \ | |
53 | addr1, addr2, args_trail); \ | |
54 | } while (0) | |
55 | ||
9ba682f0 | 56 | /* max. connections per adapter */ |
57 | #define CXGBI_MAX_CONN 16384 | |
58 | ||
59 | /* always allocate rooms for AHS */ | |
60 | #define SKB_TX_ISCSI_PDU_HEADER_MAX \ | |
61 | (sizeof(struct iscsi_hdr) + ISCSI_MAX_AHS_SIZE) | |
62 | ||
63 | #define ISCSI_PDU_NONPAYLOAD_LEN 312 /* bhs(48) + ahs(256) + digest(8)*/ | |
64 | ||
65 | /* | |
66 | * align pdu size to multiple of 512 for better performance | |
67 | */ | |
68 | #define cxgbi_align_pdu_size(n) do { n = (n) & (~511); } while (0) | |
69 | ||
70 | #define ULP2_MODE_ISCSI 2 | |
71 | ||
72 | #define ULP2_MAX_PKT_SIZE 16224 | |
73 | #define ULP2_MAX_PDU_PAYLOAD \ | |
74 | (ULP2_MAX_PKT_SIZE - ISCSI_PDU_NONPAYLOAD_LEN) | |
75 | ||
76 | /* | |
77 | * For iscsi connections HW may inserts digest bytes into the pdu. Those digest | |
78 | * bytes are not sent by the host but are part of the TCP payload and therefore | |
79 | * consume TCP sequence space. | |
80 | */ | |
81 | static const unsigned int ulp2_extra_len[] = { 0, 4, 4, 8 }; | |
82 | static inline unsigned int cxgbi_ulp_extra_len(int submode) | |
83 | { | |
84 | return ulp2_extra_len[submode & 3]; | |
85 | } | |
86 | ||
87 | /* | |
88 | * struct pagepod_hdr, pagepod - pagepod format | |
89 | */ | |
90 | ||
91 | #define CPL_RX_DDP_STATUS_DDP_SHIFT 16 /* ddp'able */ | |
92 | #define CPL_RX_DDP_STATUS_PAD_SHIFT 19 /* pad error */ | |
93 | #define CPL_RX_DDP_STATUS_HCRC_SHIFT 20 /* hcrc error */ | |
94 | #define CPL_RX_DDP_STATUS_DCRC_SHIFT 21 /* dcrc error */ | |
95 | ||
96 | struct cxgbi_pagepod_hdr { | |
97 | u32 vld_tid; | |
98 | u32 pgsz_tag_clr; | |
99 | u32 max_offset; | |
100 | u32 page_offset; | |
101 | u64 rsvd; | |
102 | }; | |
103 | ||
104 | #define PPOD_PAGES_MAX 4 | |
105 | struct cxgbi_pagepod { | |
106 | struct cxgbi_pagepod_hdr hdr; | |
107 | u64 addr[PPOD_PAGES_MAX + 1]; | |
108 | }; | |
109 | ||
110 | struct cxgbi_tag_format { | |
111 | unsigned char sw_bits; | |
112 | unsigned char rsvd_bits; | |
113 | unsigned char rsvd_shift; | |
114 | unsigned char filler[1]; | |
115 | u32 rsvd_mask; | |
116 | }; | |
117 | ||
118 | struct cxgbi_gather_list { | |
119 | unsigned int tag; | |
120 | unsigned int length; | |
121 | unsigned int offset; | |
122 | unsigned int nelem; | |
123 | struct page **pages; | |
124 | dma_addr_t phys_addr[0]; | |
125 | }; | |
126 | ||
127 | struct cxgbi_ddp_info { | |
128 | struct kref refcnt; | |
129 | struct cxgbi_device *cdev; | |
130 | struct pci_dev *pdev; | |
131 | unsigned int max_txsz; | |
132 | unsigned int max_rxsz; | |
133 | unsigned int llimit; | |
134 | unsigned int ulimit; | |
135 | unsigned int nppods; | |
136 | unsigned int idx_last; | |
137 | unsigned char idx_bits; | |
138 | unsigned char filler[3]; | |
139 | unsigned int idx_mask; | |
140 | unsigned int rsvd_tag_mask; | |
141 | spinlock_t map_lock; | |
142 | struct cxgbi_gather_list **gl_map; | |
9ba682f0 | 143 | }; |
144 | ||
145 | #define DDP_PGIDX_MAX 4 | |
146 | #define DDP_THRESHOLD 2048 | |
147 | ||
148 | #define PPOD_PAGES_SHIFT 2 /* 4 pages per pod */ | |
149 | ||
150 | #define PPOD_SIZE sizeof(struct cxgbi_pagepod) /* 64 */ | |
151 | #define PPOD_SIZE_SHIFT 6 | |
152 | ||
153 | #define ULPMEM_DSGL_MAX_NPPODS 16 /* 1024/PPOD_SIZE */ | |
154 | #define ULPMEM_IDATA_MAX_NPPODS 4 /* 256/PPOD_SIZE */ | |
155 | #define PCIE_MEMWIN_MAX_NPPODS 16 /* 1024/PPOD_SIZE */ | |
156 | ||
157 | #define PPOD_COLOR_SHIFT 0 | |
158 | #define PPOD_COLOR(x) ((x) << PPOD_COLOR_SHIFT) | |
159 | ||
160 | #define PPOD_IDX_SHIFT 6 | |
161 | #define PPOD_IDX_MAX_SIZE 24 | |
162 | ||
163 | #define PPOD_TID_SHIFT 0 | |
164 | #define PPOD_TID(x) ((x) << PPOD_TID_SHIFT) | |
165 | ||
166 | #define PPOD_TAG_SHIFT 6 | |
167 | #define PPOD_TAG(x) ((x) << PPOD_TAG_SHIFT) | |
168 | ||
169 | #define PPOD_VALID_SHIFT 24 | |
170 | #define PPOD_VALID(x) ((x) << PPOD_VALID_SHIFT) | |
171 | #define PPOD_VALID_FLAG PPOD_VALID(1U) | |
172 | ||
9ba682f0 | 173 | /* |
174 | * sge_opaque_hdr - | |
175 | * Opaque version of structure the SGE stores at skb->head of TX_DATA packets | |
176 | * and for which we must reserve space. | |
177 | */ | |
178 | struct sge_opaque_hdr { | |
179 | void *dev; | |
180 | dma_addr_t addr[MAX_SKB_FRAGS + 1]; | |
181 | }; | |
182 | ||
183 | struct cxgbi_sock { | |
184 | struct cxgbi_device *cdev; | |
185 | ||
186 | int tid; | |
187 | int atid; | |
188 | unsigned long flags; | |
189 | unsigned int mtu; | |
190 | unsigned short rss_qid; | |
191 | unsigned short txq_idx; | |
192 | unsigned short advmss; | |
193 | unsigned int tx_chan; | |
194 | unsigned int rx_chan; | |
195 | unsigned int mss_idx; | |
196 | unsigned int smac_idx; | |
197 | unsigned char port_id; | |
198 | int wr_max_cred; | |
199 | int wr_cred; | |
200 | int wr_una_cred; | |
201 | unsigned char hcrc_len; | |
202 | unsigned char dcrc_len; | |
203 | ||
204 | void *l2t; | |
205 | struct sk_buff *wr_pending_head; | |
206 | struct sk_buff *wr_pending_tail; | |
207 | struct sk_buff *cpl_close; | |
208 | struct sk_buff *cpl_abort_req; | |
209 | struct sk_buff *cpl_abort_rpl; | |
210 | struct sk_buff *skb_ulp_lhdr; | |
211 | spinlock_t lock; | |
212 | struct kref refcnt; | |
213 | unsigned int state; | |
fc8d0590 AB |
214 | unsigned int csk_family; |
215 | union { | |
216 | struct sockaddr_in saddr; | |
217 | struct sockaddr_in6 saddr6; | |
218 | }; | |
219 | union { | |
220 | struct sockaddr_in daddr; | |
221 | struct sockaddr_in6 daddr6; | |
222 | }; | |
9ba682f0 | 223 | struct dst_entry *dst; |
224 | struct sk_buff_head receive_queue; | |
225 | struct sk_buff_head write_queue; | |
226 | struct timer_list retry_timer; | |
227 | int err; | |
228 | rwlock_t callback_lock; | |
229 | void *user_data; | |
230 | ||
231 | u32 rcv_nxt; | |
232 | u32 copied_seq; | |
233 | u32 rcv_wup; | |
234 | u32 snd_nxt; | |
235 | u32 snd_una; | |
236 | u32 write_seq; | |
81daf10c KX |
237 | u32 snd_win; |
238 | u32 rcv_win; | |
9ba682f0 | 239 | }; |
240 | ||
241 | /* | |
242 | * connection states | |
243 | */ | |
244 | enum cxgbi_sock_states{ | |
245 | CTP_CLOSED, | |
246 | CTP_CONNECTING, | |
247 | CTP_ACTIVE_OPEN, | |
248 | CTP_ESTABLISHED, | |
249 | CTP_ACTIVE_CLOSE, | |
250 | CTP_PASSIVE_CLOSE, | |
251 | CTP_CLOSE_WAIT_1, | |
252 | CTP_CLOSE_WAIT_2, | |
253 | CTP_ABORTING, | |
254 | }; | |
255 | ||
256 | /* | |
257 | * Connection flags -- many to track some close related events. | |
258 | */ | |
259 | enum cxgbi_sock_flags { | |
260 | CTPF_ABORT_RPL_RCVD, /*received one ABORT_RPL_RSS message */ | |
261 | CTPF_ABORT_REQ_RCVD, /*received one ABORT_REQ_RSS message */ | |
262 | CTPF_ABORT_RPL_PENDING, /* expecting an abort reply */ | |
263 | CTPF_TX_DATA_SENT, /* already sent a TX_DATA WR */ | |
264 | CTPF_ACTIVE_CLOSE_NEEDED,/* need to be closed */ | |
265 | CTPF_HAS_ATID, /* reserved atid */ | |
266 | CTPF_HAS_TID, /* reserved hw tid */ | |
267 | CTPF_OFFLOAD_DOWN, /* offload function off */ | |
268 | }; | |
269 | ||
270 | struct cxgbi_skb_rx_cb { | |
271 | __u32 ddigest; | |
272 | __u32 pdulen; | |
273 | }; | |
274 | ||
275 | struct cxgbi_skb_tx_cb { | |
276 | void *l2t; | |
277 | struct sk_buff *wr_next; | |
278 | }; | |
279 | ||
280 | enum cxgbi_skcb_flags { | |
281 | SKCBF_TX_NEED_HDR, /* packet needs a header */ | |
282 | SKCBF_RX_COALESCED, /* received whole pdu */ | |
25985edc LDM |
283 | SKCBF_RX_HDR, /* received pdu header */ |
284 | SKCBF_RX_DATA, /* received pdu payload */ | |
285 | SKCBF_RX_STATUS, /* received ddp status */ | |
9ba682f0 | 286 | SKCBF_RX_DATA_DDPD, /* pdu payload ddp'd */ |
287 | SKCBF_RX_HCRC_ERR, /* header digest error */ | |
288 | SKCBF_RX_DCRC_ERR, /* data digest error */ | |
289 | SKCBF_RX_PAD_ERR, /* padding byte error */ | |
290 | }; | |
291 | ||
292 | struct cxgbi_skb_cb { | |
293 | unsigned char ulp_mode; | |
294 | unsigned long flags; | |
295 | unsigned int seq; | |
296 | union { | |
297 | struct cxgbi_skb_rx_cb rx; | |
298 | struct cxgbi_skb_tx_cb tx; | |
299 | }; | |
300 | }; | |
301 | ||
302 | #define CXGBI_SKB_CB(skb) ((struct cxgbi_skb_cb *)&((skb)->cb[0])) | |
303 | #define cxgbi_skcb_flags(skb) (CXGBI_SKB_CB(skb)->flags) | |
304 | #define cxgbi_skcb_ulp_mode(skb) (CXGBI_SKB_CB(skb)->ulp_mode) | |
305 | #define cxgbi_skcb_tcp_seq(skb) (CXGBI_SKB_CB(skb)->seq) | |
306 | #define cxgbi_skcb_rx_ddigest(skb) (CXGBI_SKB_CB(skb)->rx.ddigest) | |
307 | #define cxgbi_skcb_rx_pdulen(skb) (CXGBI_SKB_CB(skb)->rx.pdulen) | |
308 | #define cxgbi_skcb_tx_wr_next(skb) (CXGBI_SKB_CB(skb)->tx.wr_next) | |
309 | ||
310 | static inline void cxgbi_skcb_set_flag(struct sk_buff *skb, | |
311 | enum cxgbi_skcb_flags flag) | |
312 | { | |
313 | __set_bit(flag, &(cxgbi_skcb_flags(skb))); | |
314 | } | |
315 | ||
316 | static inline void cxgbi_skcb_clear_flag(struct sk_buff *skb, | |
317 | enum cxgbi_skcb_flags flag) | |
318 | { | |
319 | __clear_bit(flag, &(cxgbi_skcb_flags(skb))); | |
320 | } | |
321 | ||
84944d8c KX |
322 | static inline int cxgbi_skcb_test_flag(const struct sk_buff *skb, |
323 | enum cxgbi_skcb_flags flag) | |
9ba682f0 | 324 | { |
325 | return test_bit(flag, &(cxgbi_skcb_flags(skb))); | |
326 | } | |
327 | ||
328 | static inline void cxgbi_sock_set_flag(struct cxgbi_sock *csk, | |
329 | enum cxgbi_sock_flags flag) | |
330 | { | |
331 | __set_bit(flag, &csk->flags); | |
332 | log_debug(1 << CXGBI_DBG_SOCK, | |
333 | "csk 0x%p,%u,0x%lx, bit %d.\n", | |
334 | csk, csk->state, csk->flags, flag); | |
335 | } | |
336 | ||
337 | static inline void cxgbi_sock_clear_flag(struct cxgbi_sock *csk, | |
338 | enum cxgbi_sock_flags flag) | |
339 | { | |
340 | __clear_bit(flag, &csk->flags); | |
341 | log_debug(1 << CXGBI_DBG_SOCK, | |
342 | "csk 0x%p,%u,0x%lx, bit %d.\n", | |
343 | csk, csk->state, csk->flags, flag); | |
344 | } | |
345 | ||
346 | static inline int cxgbi_sock_flag(struct cxgbi_sock *csk, | |
347 | enum cxgbi_sock_flags flag) | |
348 | { | |
349 | if (csk == NULL) | |
350 | return 0; | |
351 | return test_bit(flag, &csk->flags); | |
352 | } | |
353 | ||
354 | static inline void cxgbi_sock_set_state(struct cxgbi_sock *csk, int state) | |
355 | { | |
356 | log_debug(1 << CXGBI_DBG_SOCK, | |
357 | "csk 0x%p,%u,0x%lx, state -> %u.\n", | |
358 | csk, csk->state, csk->flags, state); | |
359 | csk->state = state; | |
360 | } | |
361 | ||
362 | static inline void cxgbi_sock_free(struct kref *kref) | |
363 | { | |
364 | struct cxgbi_sock *csk = container_of(kref, | |
365 | struct cxgbi_sock, | |
366 | refcnt); | |
367 | if (csk) { | |
368 | log_debug(1 << CXGBI_DBG_SOCK, | |
369 | "free csk 0x%p, state %u, flags 0x%lx\n", | |
370 | csk, csk->state, csk->flags); | |
371 | kfree(csk); | |
372 | } | |
373 | } | |
374 | ||
375 | static inline void __cxgbi_sock_put(const char *fn, struct cxgbi_sock *csk) | |
376 | { | |
377 | log_debug(1 << CXGBI_DBG_SOCK, | |
378 | "%s, put csk 0x%p, ref %u-1.\n", | |
379 | fn, csk, atomic_read(&csk->refcnt.refcount)); | |
380 | kref_put(&csk->refcnt, cxgbi_sock_free); | |
381 | } | |
382 | #define cxgbi_sock_put(csk) __cxgbi_sock_put(__func__, csk) | |
383 | ||
384 | static inline void __cxgbi_sock_get(const char *fn, struct cxgbi_sock *csk) | |
385 | { | |
386 | log_debug(1 << CXGBI_DBG_SOCK, | |
387 | "%s, get csk 0x%p, ref %u+1.\n", | |
388 | fn, csk, atomic_read(&csk->refcnt.refcount)); | |
389 | kref_get(&csk->refcnt); | |
390 | } | |
391 | #define cxgbi_sock_get(csk) __cxgbi_sock_get(__func__, csk) | |
392 | ||
393 | static inline int cxgbi_sock_is_closing(struct cxgbi_sock *csk) | |
394 | { | |
395 | return csk->state >= CTP_ACTIVE_CLOSE; | |
396 | } | |
397 | ||
398 | static inline int cxgbi_sock_is_established(struct cxgbi_sock *csk) | |
399 | { | |
400 | return csk->state == CTP_ESTABLISHED; | |
401 | } | |
402 | ||
403 | static inline void cxgbi_sock_purge_write_queue(struct cxgbi_sock *csk) | |
404 | { | |
405 | struct sk_buff *skb; | |
406 | ||
407 | while ((skb = __skb_dequeue(&csk->write_queue))) | |
408 | __kfree_skb(skb); | |
409 | } | |
410 | ||
411 | static inline unsigned int cxgbi_sock_compute_wscale(unsigned int win) | |
412 | { | |
413 | unsigned int wscale = 0; | |
414 | ||
415 | while (wscale < 14 && (65535 << wscale) < win) | |
416 | wscale++; | |
417 | return wscale; | |
418 | } | |
419 | ||
24d3f95a | 420 | static inline struct sk_buff *alloc_wr(int wrlen, int dlen, gfp_t gfp) |
9ba682f0 | 421 | { |
9ba682f0 | 422 | struct sk_buff *skb = alloc_skb(wrlen + dlen, gfp); |
423 | ||
424 | if (skb) { | |
425 | __skb_put(skb, wrlen); | |
426 | memset(skb->head, 0, wrlen + dlen); | |
427 | } else | |
24d3f95a | 428 | pr_info("alloc cpl wr skb %u+%u, OOM.\n", wrlen, dlen); |
9ba682f0 | 429 | return skb; |
430 | } | |
431 | ||
432 | ||
433 | /* | |
434 | * The number of WRs needed for an skb depends on the number of fragments | |
435 | * in the skb and whether it has any payload in its main body. This maps the | |
436 | * length of the gather list represented by an skb into the # of necessary WRs. | |
437 | * The extra two fragments are for iscsi bhs and payload padding. | |
438 | */ | |
439 | #define SKB_WR_LIST_SIZE (MAX_SKB_FRAGS + 2) | |
440 | ||
441 | static inline void cxgbi_sock_reset_wr_list(struct cxgbi_sock *csk) | |
442 | { | |
443 | csk->wr_pending_head = csk->wr_pending_tail = NULL; | |
444 | } | |
445 | ||
446 | static inline void cxgbi_sock_enqueue_wr(struct cxgbi_sock *csk, | |
447 | struct sk_buff *skb) | |
448 | { | |
449 | cxgbi_skcb_tx_wr_next(skb) = NULL; | |
450 | /* | |
451 | * We want to take an extra reference since both us and the driver | |
452 | * need to free the packet before it's really freed. We know there's | |
453 | * just one user currently so we use atomic_set rather than skb_get | |
454 | * to avoid the atomic op. | |
455 | */ | |
456 | atomic_set(&skb->users, 2); | |
457 | ||
458 | if (!csk->wr_pending_head) | |
459 | csk->wr_pending_head = skb; | |
460 | else | |
461 | cxgbi_skcb_tx_wr_next(csk->wr_pending_tail) = skb; | |
462 | csk->wr_pending_tail = skb; | |
463 | } | |
464 | ||
465 | static inline int cxgbi_sock_count_pending_wrs(const struct cxgbi_sock *csk) | |
466 | { | |
467 | int n = 0; | |
468 | const struct sk_buff *skb = csk->wr_pending_head; | |
469 | ||
470 | while (skb) { | |
471 | n += skb->csum; | |
472 | skb = cxgbi_skcb_tx_wr_next(skb); | |
473 | } | |
474 | return n; | |
475 | } | |
476 | ||
477 | static inline struct sk_buff *cxgbi_sock_peek_wr(const struct cxgbi_sock *csk) | |
478 | { | |
479 | return csk->wr_pending_head; | |
480 | } | |
481 | ||
482 | static inline struct sk_buff *cxgbi_sock_dequeue_wr(struct cxgbi_sock *csk) | |
483 | { | |
484 | struct sk_buff *skb = csk->wr_pending_head; | |
485 | ||
486 | if (likely(skb)) { | |
487 | csk->wr_pending_head = cxgbi_skcb_tx_wr_next(skb); | |
488 | cxgbi_skcb_tx_wr_next(skb) = NULL; | |
489 | } | |
490 | return skb; | |
491 | } | |
492 | ||
493 | void cxgbi_sock_check_wr_invariants(const struct cxgbi_sock *); | |
494 | void cxgbi_sock_purge_wr_queue(struct cxgbi_sock *); | |
495 | void cxgbi_sock_skb_entail(struct cxgbi_sock *, struct sk_buff *); | |
496 | void cxgbi_sock_fail_act_open(struct cxgbi_sock *, int); | |
497 | void cxgbi_sock_act_open_req_arp_failure(void *, struct sk_buff *); | |
498 | void cxgbi_sock_closed(struct cxgbi_sock *); | |
499 | void cxgbi_sock_established(struct cxgbi_sock *, unsigned int, unsigned int); | |
500 | void cxgbi_sock_rcv_abort_rpl(struct cxgbi_sock *); | |
501 | void cxgbi_sock_rcv_peer_close(struct cxgbi_sock *); | |
502 | void cxgbi_sock_rcv_close_conn_rpl(struct cxgbi_sock *, u32); | |
503 | void cxgbi_sock_rcv_wr_ack(struct cxgbi_sock *, unsigned int, unsigned int, | |
504 | int); | |
505 | unsigned int cxgbi_sock_select_mss(struct cxgbi_sock *, unsigned int); | |
506 | void cxgbi_sock_free_cpl_skbs(struct cxgbi_sock *); | |
507 | ||
508 | struct cxgbi_hba { | |
509 | struct net_device *ndev; | |
0b3d8947 | 510 | struct net_device *vdev; /* vlan dev */ |
9ba682f0 | 511 | struct Scsi_Host *shost; |
512 | struct cxgbi_device *cdev; | |
513 | __be32 ipv4addr; | |
514 | unsigned char port_id; | |
515 | }; | |
516 | ||
517 | struct cxgbi_ports_map { | |
518 | unsigned int max_connect; | |
519 | unsigned int used; | |
520 | unsigned short sport_base; | |
521 | spinlock_t lock; | |
522 | unsigned int next; | |
523 | struct cxgbi_sock **port_csk; | |
524 | }; | |
525 | ||
526 | #define CXGBI_FLAG_DEV_T3 0x1 | |
527 | #define CXGBI_FLAG_DEV_T4 0x2 | |
528 | #define CXGBI_FLAG_ADAPTER_RESET 0x4 | |
529 | #define CXGBI_FLAG_IPV4_SET 0x10 | |
530 | struct cxgbi_device { | |
531 | struct list_head list_head; | |
078efae0 | 532 | struct list_head rcu_node; |
9ba682f0 | 533 | unsigned int flags; |
534 | struct net_device **ports; | |
535 | void *lldev; | |
536 | struct cxgbi_hba **hbas; | |
537 | const unsigned short *mtus; | |
538 | unsigned char nmtus; | |
539 | unsigned char nports; | |
540 | struct pci_dev *pdev; | |
541 | struct dentry *debugfs_root; | |
542 | struct iscsi_transport *itp; | |
543 | ||
544 | unsigned int pfvf; | |
9ba682f0 | 545 | unsigned int rx_credit_thres; |
546 | unsigned int skb_tx_rsvd; | |
547 | unsigned int skb_rx_extra; /* for msg coalesced mode */ | |
548 | unsigned int tx_max_size; | |
549 | unsigned int rx_max_size; | |
550 | struct cxgbi_ports_map pmap; | |
551 | struct cxgbi_tag_format tag_format; | |
552 | struct cxgbi_ddp_info *ddp; | |
553 | ||
554 | void (*dev_ddp_cleanup)(struct cxgbi_device *); | |
9ba682f0 | 555 | int (*csk_ddp_set)(struct cxgbi_sock *, struct cxgbi_pagepod_hdr *, |
556 | unsigned int, unsigned int, | |
557 | struct cxgbi_gather_list *); | |
558 | void (*csk_ddp_clear)(struct cxgbi_hba *, | |
559 | unsigned int, unsigned int, unsigned int); | |
560 | int (*csk_ddp_setup_digest)(struct cxgbi_sock *, | |
561 | unsigned int, int, int, int); | |
562 | int (*csk_ddp_setup_pgidx)(struct cxgbi_sock *, | |
563 | unsigned int, int, bool); | |
564 | ||
565 | void (*csk_release_offload_resources)(struct cxgbi_sock *); | |
566 | int (*csk_rx_pdu_ready)(struct cxgbi_sock *, struct sk_buff *); | |
567 | u32 (*csk_send_rx_credits)(struct cxgbi_sock *, u32); | |
568 | int (*csk_push_tx_frames)(struct cxgbi_sock *, int); | |
569 | void (*csk_send_abort_req)(struct cxgbi_sock *); | |
570 | void (*csk_send_close_req)(struct cxgbi_sock *); | |
571 | int (*csk_alloc_cpls)(struct cxgbi_sock *); | |
572 | int (*csk_init_act_open)(struct cxgbi_sock *); | |
573 | ||
574 | void *dd_data; | |
575 | }; | |
576 | #define cxgbi_cdev_priv(cdev) ((cdev)->dd_data) | |
577 | ||
578 | struct cxgbi_conn { | |
579 | struct cxgbi_endpoint *cep; | |
580 | struct iscsi_conn *iconn; | |
581 | struct cxgbi_hba *chba; | |
582 | u32 task_idx_bits; | |
583 | }; | |
584 | ||
585 | struct cxgbi_endpoint { | |
586 | struct cxgbi_conn *cconn; | |
587 | struct cxgbi_hba *chba; | |
588 | struct cxgbi_sock *csk; | |
589 | }; | |
590 | ||
591 | #define MAX_PDU_FRAGS ((ULP2_MAX_PDU_PAYLOAD + 512 - 1) / 512) | |
592 | struct cxgbi_task_data { | |
593 | unsigned short nr_frags; | |
6a39a16a | 594 | struct page_frag frags[MAX_PDU_FRAGS]; |
9ba682f0 | 595 | struct sk_buff *skb; |
596 | unsigned int offset; | |
597 | unsigned int count; | |
598 | unsigned int sgoffset; | |
599 | }; | |
e3d2ad8c | 600 | #define iscsi_task_cxgbi_data(task) \ |
601 | ((task)->dd_data + sizeof(struct iscsi_tcp_task)) | |
9ba682f0 | 602 | |
603 | static inline int cxgbi_is_ddp_tag(struct cxgbi_tag_format *tformat, u32 tag) | |
604 | { | |
605 | return !(tag & (1 << (tformat->rsvd_bits + tformat->rsvd_shift - 1))); | |
606 | } | |
607 | ||
608 | static inline int cxgbi_sw_tag_usable(struct cxgbi_tag_format *tformat, | |
609 | u32 sw_tag) | |
610 | { | |
611 | sw_tag >>= (32 - tformat->rsvd_bits); | |
612 | return !sw_tag; | |
613 | } | |
614 | ||
615 | static inline u32 cxgbi_set_non_ddp_tag(struct cxgbi_tag_format *tformat, | |
616 | u32 sw_tag) | |
617 | { | |
618 | unsigned char shift = tformat->rsvd_bits + tformat->rsvd_shift - 1; | |
619 | u32 mask = (1 << shift) - 1; | |
620 | ||
621 | if (sw_tag && (sw_tag & ~mask)) { | |
622 | u32 v1 = sw_tag & ((1 << shift) - 1); | |
623 | u32 v2 = (sw_tag >> (shift - 1)) << shift; | |
624 | ||
625 | return v2 | v1 | 1 << shift; | |
626 | } | |
627 | ||
628 | return sw_tag | 1 << shift; | |
629 | } | |
630 | ||
631 | static inline u32 cxgbi_ddp_tag_base(struct cxgbi_tag_format *tformat, | |
632 | u32 sw_tag) | |
633 | { | |
634 | u32 mask = (1 << tformat->rsvd_shift) - 1; | |
635 | ||
636 | if (sw_tag && (sw_tag & ~mask)) { | |
637 | u32 v1 = sw_tag & mask; | |
638 | u32 v2 = sw_tag >> tformat->rsvd_shift; | |
639 | ||
640 | v2 <<= tformat->rsvd_bits + tformat->rsvd_shift; | |
641 | ||
642 | return v2 | v1; | |
643 | } | |
644 | ||
645 | return sw_tag; | |
646 | } | |
647 | ||
648 | static inline u32 cxgbi_tag_rsvd_bits(struct cxgbi_tag_format *tformat, | |
649 | u32 tag) | |
650 | { | |
651 | if (cxgbi_is_ddp_tag(tformat, tag)) | |
652 | return (tag >> tformat->rsvd_shift) & tformat->rsvd_mask; | |
653 | ||
654 | return 0; | |
655 | } | |
656 | ||
657 | static inline u32 cxgbi_tag_nonrsvd_bits(struct cxgbi_tag_format *tformat, | |
658 | u32 tag) | |
659 | { | |
660 | unsigned char shift = tformat->rsvd_bits + tformat->rsvd_shift - 1; | |
661 | u32 v1, v2; | |
662 | ||
663 | if (cxgbi_is_ddp_tag(tformat, tag)) { | |
664 | v1 = tag & ((1 << tformat->rsvd_shift) - 1); | |
665 | v2 = (tag >> (shift + 1)) << tformat->rsvd_shift; | |
666 | } else { | |
667 | u32 mask = (1 << shift) - 1; | |
668 | tag &= ~(1 << shift); | |
669 | v1 = tag & mask; | |
670 | v2 = (tag >> 1) & ~mask; | |
671 | } | |
672 | return v1 | v2; | |
673 | } | |
674 | ||
675 | static inline void *cxgbi_alloc_big_mem(unsigned int size, | |
676 | gfp_t gfp) | |
677 | { | |
8be04b93 JP |
678 | void *p = kzalloc(size, gfp | __GFP_NOWARN); |
679 | ||
9ba682f0 | 680 | if (!p) |
8be04b93 JP |
681 | p = vzalloc(size); |
682 | ||
9ba682f0 | 683 | return p; |
684 | } | |
685 | ||
686 | static inline void cxgbi_free_big_mem(void *addr) | |
687 | { | |
688 | if (is_vmalloc_addr(addr)) | |
689 | vfree(addr); | |
690 | else | |
691 | kfree(addr); | |
692 | } | |
693 | ||
694 | static inline void cxgbi_set_iscsi_ipv4(struct cxgbi_hba *chba, __be32 ipaddr) | |
695 | { | |
696 | if (chba->cdev->flags & CXGBI_FLAG_IPV4_SET) | |
697 | chba->ipv4addr = ipaddr; | |
698 | else | |
699 | pr_info("set iscsi ipv4 NOT supported, using %s ipv4.\n", | |
700 | chba->ndev->name); | |
701 | } | |
702 | ||
9ba682f0 | 703 | struct cxgbi_device *cxgbi_device_register(unsigned int, unsigned int); |
704 | void cxgbi_device_unregister(struct cxgbi_device *); | |
705 | void cxgbi_device_unregister_all(unsigned int flag); | |
706 | struct cxgbi_device *cxgbi_device_find_by_lldev(void *); | |
fc8d0590 | 707 | struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *, int *); |
078efae0 AB |
708 | struct cxgbi_device *cxgbi_device_find_by_netdev_rcu(struct net_device *, |
709 | int *); | |
1abf635d | 710 | int cxgbi_hbas_add(struct cxgbi_device *, u64, unsigned int, |
9ba682f0 | 711 | struct scsi_host_template *, |
712 | struct scsi_transport_template *); | |
713 | void cxgbi_hbas_remove(struct cxgbi_device *); | |
714 | ||
715 | int cxgbi_device_portmap_create(struct cxgbi_device *cdev, unsigned int base, | |
716 | unsigned int max_conn); | |
717 | void cxgbi_device_portmap_cleanup(struct cxgbi_device *cdev); | |
718 | ||
719 | void cxgbi_conn_tx_open(struct cxgbi_sock *); | |
720 | void cxgbi_conn_pdu_ready(struct cxgbi_sock *); | |
721 | int cxgbi_conn_alloc_pdu(struct iscsi_task *, u8); | |
722 | int cxgbi_conn_init_pdu(struct iscsi_task *, unsigned int , unsigned int); | |
723 | int cxgbi_conn_xmit_pdu(struct iscsi_task *); | |
724 | ||
725 | void cxgbi_cleanup_task(struct iscsi_task *task); | |
726 | ||
587a1f16 | 727 | umode_t cxgbi_attr_is_visible(int param_type, int param); |
9ba682f0 | 728 | void cxgbi_get_conn_stats(struct iscsi_cls_conn *, struct iscsi_stats *); |
729 | int cxgbi_set_conn_param(struct iscsi_cls_conn *, | |
730 | enum iscsi_param, char *, int); | |
c71b9b66 | 731 | int cxgbi_get_ep_param(struct iscsi_endpoint *ep, enum iscsi_param, char *); |
9ba682f0 | 732 | struct iscsi_cls_conn *cxgbi_create_conn(struct iscsi_cls_session *, u32); |
733 | int cxgbi_bind_conn(struct iscsi_cls_session *, | |
734 | struct iscsi_cls_conn *, u64, int); | |
735 | void cxgbi_destroy_session(struct iscsi_cls_session *); | |
736 | struct iscsi_cls_session *cxgbi_create_session(struct iscsi_endpoint *, | |
737 | u16, u16, u32); | |
738 | int cxgbi_set_host_param(struct Scsi_Host *, | |
739 | enum iscsi_host_param, char *, int); | |
740 | int cxgbi_get_host_param(struct Scsi_Host *, enum iscsi_host_param, char *); | |
741 | struct iscsi_endpoint *cxgbi_ep_connect(struct Scsi_Host *, | |
742 | struct sockaddr *, int); | |
743 | int cxgbi_ep_poll(struct iscsi_endpoint *, int); | |
744 | void cxgbi_ep_disconnect(struct iscsi_endpoint *); | |
745 | ||
746 | int cxgbi_iscsi_init(struct iscsi_transport *, | |
747 | struct scsi_transport_template **); | |
748 | void cxgbi_iscsi_cleanup(struct iscsi_transport *, | |
749 | struct scsi_transport_template **); | |
750 | void cxgbi_parse_pdu_itt(struct iscsi_conn *, itt_t, int *, int *); | |
751 | int cxgbi_ddp_init(struct cxgbi_device *, unsigned int, unsigned int, | |
752 | unsigned int, unsigned int); | |
753 | int cxgbi_ddp_cleanup(struct cxgbi_device *); | |
754 | void cxgbi_ddp_page_size_factor(int *); | |
755 | void cxgbi_ddp_ppod_clear(struct cxgbi_pagepod *); | |
756 | void cxgbi_ddp_ppod_set(struct cxgbi_pagepod *, struct cxgbi_pagepod_hdr *, | |
757 | struct cxgbi_gather_list *, unsigned int); | |
758 | #endif /*__LIBCXGBI_H__*/ |