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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 | ||
47 | /* max. connections per adapter */ | |
48 | #define CXGBI_MAX_CONN 16384 | |
49 | ||
50 | /* always allocate rooms for AHS */ | |
51 | #define SKB_TX_ISCSI_PDU_HEADER_MAX \ | |
52 | (sizeof(struct iscsi_hdr) + ISCSI_MAX_AHS_SIZE) | |
53 | ||
54 | #define ISCSI_PDU_NONPAYLOAD_LEN 312 /* bhs(48) + ahs(256) + digest(8)*/ | |
55 | ||
56 | /* | |
57 | * align pdu size to multiple of 512 for better performance | |
58 | */ | |
59 | #define cxgbi_align_pdu_size(n) do { n = (n) & (~511); } while (0) | |
60 | ||
61 | #define ULP2_MODE_ISCSI 2 | |
62 | ||
63 | #define ULP2_MAX_PKT_SIZE 16224 | |
64 | #define ULP2_MAX_PDU_PAYLOAD \ | |
65 | (ULP2_MAX_PKT_SIZE - ISCSI_PDU_NONPAYLOAD_LEN) | |
66 | ||
67 | /* | |
68 | * For iscsi connections HW may inserts digest bytes into the pdu. Those digest | |
69 | * bytes are not sent by the host but are part of the TCP payload and therefore | |
70 | * consume TCP sequence space. | |
71 | */ | |
72 | static const unsigned int ulp2_extra_len[] = { 0, 4, 4, 8 }; | |
73 | static inline unsigned int cxgbi_ulp_extra_len(int submode) | |
74 | { | |
75 | return ulp2_extra_len[submode & 3]; | |
76 | } | |
77 | ||
78 | /* | |
79 | * struct pagepod_hdr, pagepod - pagepod format | |
80 | */ | |
81 | ||
82 | #define CPL_RX_DDP_STATUS_DDP_SHIFT 16 /* ddp'able */ | |
83 | #define CPL_RX_DDP_STATUS_PAD_SHIFT 19 /* pad error */ | |
84 | #define CPL_RX_DDP_STATUS_HCRC_SHIFT 20 /* hcrc error */ | |
85 | #define CPL_RX_DDP_STATUS_DCRC_SHIFT 21 /* dcrc error */ | |
86 | ||
87 | struct cxgbi_pagepod_hdr { | |
88 | u32 vld_tid; | |
89 | u32 pgsz_tag_clr; | |
90 | u32 max_offset; | |
91 | u32 page_offset; | |
92 | u64 rsvd; | |
93 | }; | |
94 | ||
95 | #define PPOD_PAGES_MAX 4 | |
96 | struct cxgbi_pagepod { | |
97 | struct cxgbi_pagepod_hdr hdr; | |
98 | u64 addr[PPOD_PAGES_MAX + 1]; | |
99 | }; | |
100 | ||
101 | struct cxgbi_tag_format { | |
102 | unsigned char sw_bits; | |
103 | unsigned char rsvd_bits; | |
104 | unsigned char rsvd_shift; | |
105 | unsigned char filler[1]; | |
106 | u32 rsvd_mask; | |
107 | }; | |
108 | ||
109 | struct cxgbi_gather_list { | |
110 | unsigned int tag; | |
111 | unsigned int length; | |
112 | unsigned int offset; | |
113 | unsigned int nelem; | |
114 | struct page **pages; | |
115 | dma_addr_t phys_addr[0]; | |
116 | }; | |
117 | ||
118 | struct cxgbi_ddp_info { | |
119 | struct kref refcnt; | |
120 | struct cxgbi_device *cdev; | |
121 | struct pci_dev *pdev; | |
122 | unsigned int max_txsz; | |
123 | unsigned int max_rxsz; | |
124 | unsigned int llimit; | |
125 | unsigned int ulimit; | |
126 | unsigned int nppods; | |
127 | unsigned int idx_last; | |
128 | unsigned char idx_bits; | |
129 | unsigned char filler[3]; | |
130 | unsigned int idx_mask; | |
131 | unsigned int rsvd_tag_mask; | |
132 | spinlock_t map_lock; | |
133 | struct cxgbi_gather_list **gl_map; | |
9ba682f0 | 134 | }; |
135 | ||
136 | #define DDP_PGIDX_MAX 4 | |
137 | #define DDP_THRESHOLD 2048 | |
138 | ||
139 | #define PPOD_PAGES_SHIFT 2 /* 4 pages per pod */ | |
140 | ||
141 | #define PPOD_SIZE sizeof(struct cxgbi_pagepod) /* 64 */ | |
142 | #define PPOD_SIZE_SHIFT 6 | |
143 | ||
144 | #define ULPMEM_DSGL_MAX_NPPODS 16 /* 1024/PPOD_SIZE */ | |
145 | #define ULPMEM_IDATA_MAX_NPPODS 4 /* 256/PPOD_SIZE */ | |
146 | #define PCIE_MEMWIN_MAX_NPPODS 16 /* 1024/PPOD_SIZE */ | |
147 | ||
148 | #define PPOD_COLOR_SHIFT 0 | |
149 | #define PPOD_COLOR(x) ((x) << PPOD_COLOR_SHIFT) | |
150 | ||
151 | #define PPOD_IDX_SHIFT 6 | |
152 | #define PPOD_IDX_MAX_SIZE 24 | |
153 | ||
154 | #define PPOD_TID_SHIFT 0 | |
155 | #define PPOD_TID(x) ((x) << PPOD_TID_SHIFT) | |
156 | ||
157 | #define PPOD_TAG_SHIFT 6 | |
158 | #define PPOD_TAG(x) ((x) << PPOD_TAG_SHIFT) | |
159 | ||
160 | #define PPOD_VALID_SHIFT 24 | |
161 | #define PPOD_VALID(x) ((x) << PPOD_VALID_SHIFT) | |
162 | #define PPOD_VALID_FLAG PPOD_VALID(1U) | |
163 | ||
9ba682f0 | 164 | /* |
165 | * sge_opaque_hdr - | |
166 | * Opaque version of structure the SGE stores at skb->head of TX_DATA packets | |
167 | * and for which we must reserve space. | |
168 | */ | |
169 | struct sge_opaque_hdr { | |
170 | void *dev; | |
171 | dma_addr_t addr[MAX_SKB_FRAGS + 1]; | |
172 | }; | |
173 | ||
174 | struct cxgbi_sock { | |
175 | struct cxgbi_device *cdev; | |
176 | ||
177 | int tid; | |
178 | int atid; | |
179 | unsigned long flags; | |
180 | unsigned int mtu; | |
181 | unsigned short rss_qid; | |
182 | unsigned short txq_idx; | |
183 | unsigned short advmss; | |
184 | unsigned int tx_chan; | |
185 | unsigned int rx_chan; | |
186 | unsigned int mss_idx; | |
187 | unsigned int smac_idx; | |
188 | unsigned char port_id; | |
189 | int wr_max_cred; | |
190 | int wr_cred; | |
191 | int wr_una_cred; | |
192 | unsigned char hcrc_len; | |
193 | unsigned char dcrc_len; | |
194 | ||
195 | void *l2t; | |
196 | struct sk_buff *wr_pending_head; | |
197 | struct sk_buff *wr_pending_tail; | |
198 | struct sk_buff *cpl_close; | |
199 | struct sk_buff *cpl_abort_req; | |
200 | struct sk_buff *cpl_abort_rpl; | |
201 | struct sk_buff *skb_ulp_lhdr; | |
202 | spinlock_t lock; | |
203 | struct kref refcnt; | |
204 | unsigned int state; | |
205 | struct sockaddr_in saddr; | |
206 | struct sockaddr_in daddr; | |
207 | struct dst_entry *dst; | |
208 | struct sk_buff_head receive_queue; | |
209 | struct sk_buff_head write_queue; | |
210 | struct timer_list retry_timer; | |
211 | int err; | |
212 | rwlock_t callback_lock; | |
213 | void *user_data; | |
214 | ||
215 | u32 rcv_nxt; | |
216 | u32 copied_seq; | |
217 | u32 rcv_wup; | |
218 | u32 snd_nxt; | |
219 | u32 snd_una; | |
220 | u32 write_seq; | |
221 | }; | |
222 | ||
223 | /* | |
224 | * connection states | |
225 | */ | |
226 | enum cxgbi_sock_states{ | |
227 | CTP_CLOSED, | |
228 | CTP_CONNECTING, | |
229 | CTP_ACTIVE_OPEN, | |
230 | CTP_ESTABLISHED, | |
231 | CTP_ACTIVE_CLOSE, | |
232 | CTP_PASSIVE_CLOSE, | |
233 | CTP_CLOSE_WAIT_1, | |
234 | CTP_CLOSE_WAIT_2, | |
235 | CTP_ABORTING, | |
236 | }; | |
237 | ||
238 | /* | |
239 | * Connection flags -- many to track some close related events. | |
240 | */ | |
241 | enum cxgbi_sock_flags { | |
242 | CTPF_ABORT_RPL_RCVD, /*received one ABORT_RPL_RSS message */ | |
243 | CTPF_ABORT_REQ_RCVD, /*received one ABORT_REQ_RSS message */ | |
244 | CTPF_ABORT_RPL_PENDING, /* expecting an abort reply */ | |
245 | CTPF_TX_DATA_SENT, /* already sent a TX_DATA WR */ | |
246 | CTPF_ACTIVE_CLOSE_NEEDED,/* need to be closed */ | |
247 | CTPF_HAS_ATID, /* reserved atid */ | |
248 | CTPF_HAS_TID, /* reserved hw tid */ | |
249 | CTPF_OFFLOAD_DOWN, /* offload function off */ | |
250 | }; | |
251 | ||
252 | struct cxgbi_skb_rx_cb { | |
253 | __u32 ddigest; | |
254 | __u32 pdulen; | |
255 | }; | |
256 | ||
257 | struct cxgbi_skb_tx_cb { | |
258 | void *l2t; | |
259 | struct sk_buff *wr_next; | |
260 | }; | |
261 | ||
262 | enum cxgbi_skcb_flags { | |
263 | SKCBF_TX_NEED_HDR, /* packet needs a header */ | |
264 | SKCBF_RX_COALESCED, /* received whole pdu */ | |
25985edc LDM |
265 | SKCBF_RX_HDR, /* received pdu header */ |
266 | SKCBF_RX_DATA, /* received pdu payload */ | |
267 | SKCBF_RX_STATUS, /* received ddp status */ | |
9ba682f0 | 268 | SKCBF_RX_DATA_DDPD, /* pdu payload ddp'd */ |
269 | SKCBF_RX_HCRC_ERR, /* header digest error */ | |
270 | SKCBF_RX_DCRC_ERR, /* data digest error */ | |
271 | SKCBF_RX_PAD_ERR, /* padding byte error */ | |
272 | }; | |
273 | ||
274 | struct cxgbi_skb_cb { | |
275 | unsigned char ulp_mode; | |
276 | unsigned long flags; | |
277 | unsigned int seq; | |
278 | union { | |
279 | struct cxgbi_skb_rx_cb rx; | |
280 | struct cxgbi_skb_tx_cb tx; | |
281 | }; | |
282 | }; | |
283 | ||
284 | #define CXGBI_SKB_CB(skb) ((struct cxgbi_skb_cb *)&((skb)->cb[0])) | |
285 | #define cxgbi_skcb_flags(skb) (CXGBI_SKB_CB(skb)->flags) | |
286 | #define cxgbi_skcb_ulp_mode(skb) (CXGBI_SKB_CB(skb)->ulp_mode) | |
287 | #define cxgbi_skcb_tcp_seq(skb) (CXGBI_SKB_CB(skb)->seq) | |
288 | #define cxgbi_skcb_rx_ddigest(skb) (CXGBI_SKB_CB(skb)->rx.ddigest) | |
289 | #define cxgbi_skcb_rx_pdulen(skb) (CXGBI_SKB_CB(skb)->rx.pdulen) | |
290 | #define cxgbi_skcb_tx_wr_next(skb) (CXGBI_SKB_CB(skb)->tx.wr_next) | |
291 | ||
292 | static inline void cxgbi_skcb_set_flag(struct sk_buff *skb, | |
293 | enum cxgbi_skcb_flags flag) | |
294 | { | |
295 | __set_bit(flag, &(cxgbi_skcb_flags(skb))); | |
296 | } | |
297 | ||
298 | static inline void cxgbi_skcb_clear_flag(struct sk_buff *skb, | |
299 | enum cxgbi_skcb_flags flag) | |
300 | { | |
301 | __clear_bit(flag, &(cxgbi_skcb_flags(skb))); | |
302 | } | |
303 | ||
304 | static inline int cxgbi_skcb_test_flag(struct sk_buff *skb, | |
305 | enum cxgbi_skcb_flags flag) | |
306 | { | |
307 | return test_bit(flag, &(cxgbi_skcb_flags(skb))); | |
308 | } | |
309 | ||
310 | static inline void cxgbi_sock_set_flag(struct cxgbi_sock *csk, | |
311 | enum cxgbi_sock_flags flag) | |
312 | { | |
313 | __set_bit(flag, &csk->flags); | |
314 | log_debug(1 << CXGBI_DBG_SOCK, | |
315 | "csk 0x%p,%u,0x%lx, bit %d.\n", | |
316 | csk, csk->state, csk->flags, flag); | |
317 | } | |
318 | ||
319 | static inline void cxgbi_sock_clear_flag(struct cxgbi_sock *csk, | |
320 | enum cxgbi_sock_flags flag) | |
321 | { | |
322 | __clear_bit(flag, &csk->flags); | |
323 | log_debug(1 << CXGBI_DBG_SOCK, | |
324 | "csk 0x%p,%u,0x%lx, bit %d.\n", | |
325 | csk, csk->state, csk->flags, flag); | |
326 | } | |
327 | ||
328 | static inline int cxgbi_sock_flag(struct cxgbi_sock *csk, | |
329 | enum cxgbi_sock_flags flag) | |
330 | { | |
331 | if (csk == NULL) | |
332 | return 0; | |
333 | return test_bit(flag, &csk->flags); | |
334 | } | |
335 | ||
336 | static inline void cxgbi_sock_set_state(struct cxgbi_sock *csk, int state) | |
337 | { | |
338 | log_debug(1 << CXGBI_DBG_SOCK, | |
339 | "csk 0x%p,%u,0x%lx, state -> %u.\n", | |
340 | csk, csk->state, csk->flags, state); | |
341 | csk->state = state; | |
342 | } | |
343 | ||
344 | static inline void cxgbi_sock_free(struct kref *kref) | |
345 | { | |
346 | struct cxgbi_sock *csk = container_of(kref, | |
347 | struct cxgbi_sock, | |
348 | refcnt); | |
349 | if (csk) { | |
350 | log_debug(1 << CXGBI_DBG_SOCK, | |
351 | "free csk 0x%p, state %u, flags 0x%lx\n", | |
352 | csk, csk->state, csk->flags); | |
353 | kfree(csk); | |
354 | } | |
355 | } | |
356 | ||
357 | static inline void __cxgbi_sock_put(const char *fn, struct cxgbi_sock *csk) | |
358 | { | |
359 | log_debug(1 << CXGBI_DBG_SOCK, | |
360 | "%s, put csk 0x%p, ref %u-1.\n", | |
361 | fn, csk, atomic_read(&csk->refcnt.refcount)); | |
362 | kref_put(&csk->refcnt, cxgbi_sock_free); | |
363 | } | |
364 | #define cxgbi_sock_put(csk) __cxgbi_sock_put(__func__, csk) | |
365 | ||
366 | static inline void __cxgbi_sock_get(const char *fn, struct cxgbi_sock *csk) | |
367 | { | |
368 | log_debug(1 << CXGBI_DBG_SOCK, | |
369 | "%s, get csk 0x%p, ref %u+1.\n", | |
370 | fn, csk, atomic_read(&csk->refcnt.refcount)); | |
371 | kref_get(&csk->refcnt); | |
372 | } | |
373 | #define cxgbi_sock_get(csk) __cxgbi_sock_get(__func__, csk) | |
374 | ||
375 | static inline int cxgbi_sock_is_closing(struct cxgbi_sock *csk) | |
376 | { | |
377 | return csk->state >= CTP_ACTIVE_CLOSE; | |
378 | } | |
379 | ||
380 | static inline int cxgbi_sock_is_established(struct cxgbi_sock *csk) | |
381 | { | |
382 | return csk->state == CTP_ESTABLISHED; | |
383 | } | |
384 | ||
385 | static inline void cxgbi_sock_purge_write_queue(struct cxgbi_sock *csk) | |
386 | { | |
387 | struct sk_buff *skb; | |
388 | ||
389 | while ((skb = __skb_dequeue(&csk->write_queue))) | |
390 | __kfree_skb(skb); | |
391 | } | |
392 | ||
393 | static inline unsigned int cxgbi_sock_compute_wscale(unsigned int win) | |
394 | { | |
395 | unsigned int wscale = 0; | |
396 | ||
397 | while (wscale < 14 && (65535 << wscale) < win) | |
398 | wscale++; | |
399 | return wscale; | |
400 | } | |
401 | ||
24d3f95a | 402 | static inline struct sk_buff *alloc_wr(int wrlen, int dlen, gfp_t gfp) |
9ba682f0 | 403 | { |
9ba682f0 | 404 | struct sk_buff *skb = alloc_skb(wrlen + dlen, gfp); |
405 | ||
406 | if (skb) { | |
407 | __skb_put(skb, wrlen); | |
408 | memset(skb->head, 0, wrlen + dlen); | |
409 | } else | |
24d3f95a | 410 | pr_info("alloc cpl wr skb %u+%u, OOM.\n", wrlen, dlen); |
9ba682f0 | 411 | return skb; |
412 | } | |
413 | ||
414 | ||
415 | /* | |
416 | * The number of WRs needed for an skb depends on the number of fragments | |
417 | * in the skb and whether it has any payload in its main body. This maps the | |
418 | * length of the gather list represented by an skb into the # of necessary WRs. | |
419 | * The extra two fragments are for iscsi bhs and payload padding. | |
420 | */ | |
421 | #define SKB_WR_LIST_SIZE (MAX_SKB_FRAGS + 2) | |
422 | ||
423 | static inline void cxgbi_sock_reset_wr_list(struct cxgbi_sock *csk) | |
424 | { | |
425 | csk->wr_pending_head = csk->wr_pending_tail = NULL; | |
426 | } | |
427 | ||
428 | static inline void cxgbi_sock_enqueue_wr(struct cxgbi_sock *csk, | |
429 | struct sk_buff *skb) | |
430 | { | |
431 | cxgbi_skcb_tx_wr_next(skb) = NULL; | |
432 | /* | |
433 | * We want to take an extra reference since both us and the driver | |
434 | * need to free the packet before it's really freed. We know there's | |
435 | * just one user currently so we use atomic_set rather than skb_get | |
436 | * to avoid the atomic op. | |
437 | */ | |
438 | atomic_set(&skb->users, 2); | |
439 | ||
440 | if (!csk->wr_pending_head) | |
441 | csk->wr_pending_head = skb; | |
442 | else | |
443 | cxgbi_skcb_tx_wr_next(csk->wr_pending_tail) = skb; | |
444 | csk->wr_pending_tail = skb; | |
445 | } | |
446 | ||
447 | static inline int cxgbi_sock_count_pending_wrs(const struct cxgbi_sock *csk) | |
448 | { | |
449 | int n = 0; | |
450 | const struct sk_buff *skb = csk->wr_pending_head; | |
451 | ||
452 | while (skb) { | |
453 | n += skb->csum; | |
454 | skb = cxgbi_skcb_tx_wr_next(skb); | |
455 | } | |
456 | return n; | |
457 | } | |
458 | ||
459 | static inline struct sk_buff *cxgbi_sock_peek_wr(const struct cxgbi_sock *csk) | |
460 | { | |
461 | return csk->wr_pending_head; | |
462 | } | |
463 | ||
464 | static inline struct sk_buff *cxgbi_sock_dequeue_wr(struct cxgbi_sock *csk) | |
465 | { | |
466 | struct sk_buff *skb = csk->wr_pending_head; | |
467 | ||
468 | if (likely(skb)) { | |
469 | csk->wr_pending_head = cxgbi_skcb_tx_wr_next(skb); | |
470 | cxgbi_skcb_tx_wr_next(skb) = NULL; | |
471 | } | |
472 | return skb; | |
473 | } | |
474 | ||
475 | void cxgbi_sock_check_wr_invariants(const struct cxgbi_sock *); | |
476 | void cxgbi_sock_purge_wr_queue(struct cxgbi_sock *); | |
477 | void cxgbi_sock_skb_entail(struct cxgbi_sock *, struct sk_buff *); | |
478 | void cxgbi_sock_fail_act_open(struct cxgbi_sock *, int); | |
479 | void cxgbi_sock_act_open_req_arp_failure(void *, struct sk_buff *); | |
480 | void cxgbi_sock_closed(struct cxgbi_sock *); | |
481 | void cxgbi_sock_established(struct cxgbi_sock *, unsigned int, unsigned int); | |
482 | void cxgbi_sock_rcv_abort_rpl(struct cxgbi_sock *); | |
483 | void cxgbi_sock_rcv_peer_close(struct cxgbi_sock *); | |
484 | void cxgbi_sock_rcv_close_conn_rpl(struct cxgbi_sock *, u32); | |
485 | void cxgbi_sock_rcv_wr_ack(struct cxgbi_sock *, unsigned int, unsigned int, | |
486 | int); | |
487 | unsigned int cxgbi_sock_select_mss(struct cxgbi_sock *, unsigned int); | |
488 | void cxgbi_sock_free_cpl_skbs(struct cxgbi_sock *); | |
489 | ||
490 | struct cxgbi_hba { | |
491 | struct net_device *ndev; | |
0b3d8947 | 492 | struct net_device *vdev; /* vlan dev */ |
9ba682f0 | 493 | struct Scsi_Host *shost; |
494 | struct cxgbi_device *cdev; | |
495 | __be32 ipv4addr; | |
496 | unsigned char port_id; | |
497 | }; | |
498 | ||
499 | struct cxgbi_ports_map { | |
500 | unsigned int max_connect; | |
501 | unsigned int used; | |
502 | unsigned short sport_base; | |
503 | spinlock_t lock; | |
504 | unsigned int next; | |
505 | struct cxgbi_sock **port_csk; | |
506 | }; | |
507 | ||
508 | #define CXGBI_FLAG_DEV_T3 0x1 | |
509 | #define CXGBI_FLAG_DEV_T4 0x2 | |
510 | #define CXGBI_FLAG_ADAPTER_RESET 0x4 | |
511 | #define CXGBI_FLAG_IPV4_SET 0x10 | |
512 | struct cxgbi_device { | |
513 | struct list_head list_head; | |
514 | unsigned int flags; | |
515 | struct net_device **ports; | |
516 | void *lldev; | |
517 | struct cxgbi_hba **hbas; | |
518 | const unsigned short *mtus; | |
519 | unsigned char nmtus; | |
520 | unsigned char nports; | |
521 | struct pci_dev *pdev; | |
522 | struct dentry *debugfs_root; | |
523 | struct iscsi_transport *itp; | |
524 | ||
525 | unsigned int pfvf; | |
526 | unsigned int snd_win; | |
527 | unsigned int rcv_win; | |
528 | unsigned int rx_credit_thres; | |
529 | unsigned int skb_tx_rsvd; | |
530 | unsigned int skb_rx_extra; /* for msg coalesced mode */ | |
531 | unsigned int tx_max_size; | |
532 | unsigned int rx_max_size; | |
533 | struct cxgbi_ports_map pmap; | |
534 | struct cxgbi_tag_format tag_format; | |
535 | struct cxgbi_ddp_info *ddp; | |
536 | ||
537 | void (*dev_ddp_cleanup)(struct cxgbi_device *); | |
9ba682f0 | 538 | int (*csk_ddp_set)(struct cxgbi_sock *, struct cxgbi_pagepod_hdr *, |
539 | unsigned int, unsigned int, | |
540 | struct cxgbi_gather_list *); | |
541 | void (*csk_ddp_clear)(struct cxgbi_hba *, | |
542 | unsigned int, unsigned int, unsigned int); | |
543 | int (*csk_ddp_setup_digest)(struct cxgbi_sock *, | |
544 | unsigned int, int, int, int); | |
545 | int (*csk_ddp_setup_pgidx)(struct cxgbi_sock *, | |
546 | unsigned int, int, bool); | |
547 | ||
548 | void (*csk_release_offload_resources)(struct cxgbi_sock *); | |
549 | int (*csk_rx_pdu_ready)(struct cxgbi_sock *, struct sk_buff *); | |
550 | u32 (*csk_send_rx_credits)(struct cxgbi_sock *, u32); | |
551 | int (*csk_push_tx_frames)(struct cxgbi_sock *, int); | |
552 | void (*csk_send_abort_req)(struct cxgbi_sock *); | |
553 | void (*csk_send_close_req)(struct cxgbi_sock *); | |
554 | int (*csk_alloc_cpls)(struct cxgbi_sock *); | |
555 | int (*csk_init_act_open)(struct cxgbi_sock *); | |
556 | ||
557 | void *dd_data; | |
558 | }; | |
559 | #define cxgbi_cdev_priv(cdev) ((cdev)->dd_data) | |
560 | ||
561 | struct cxgbi_conn { | |
562 | struct cxgbi_endpoint *cep; | |
563 | struct iscsi_conn *iconn; | |
564 | struct cxgbi_hba *chba; | |
565 | u32 task_idx_bits; | |
566 | }; | |
567 | ||
568 | struct cxgbi_endpoint { | |
569 | struct cxgbi_conn *cconn; | |
570 | struct cxgbi_hba *chba; | |
571 | struct cxgbi_sock *csk; | |
572 | }; | |
573 | ||
574 | #define MAX_PDU_FRAGS ((ULP2_MAX_PDU_PAYLOAD + 512 - 1) / 512) | |
575 | struct cxgbi_task_data { | |
576 | unsigned short nr_frags; | |
6a39a16a | 577 | struct page_frag frags[MAX_PDU_FRAGS]; |
9ba682f0 | 578 | struct sk_buff *skb; |
579 | unsigned int offset; | |
580 | unsigned int count; | |
581 | unsigned int sgoffset; | |
582 | }; | |
e3d2ad8c | 583 | #define iscsi_task_cxgbi_data(task) \ |
584 | ((task)->dd_data + sizeof(struct iscsi_tcp_task)) | |
9ba682f0 | 585 | |
586 | static inline int cxgbi_is_ddp_tag(struct cxgbi_tag_format *tformat, u32 tag) | |
587 | { | |
588 | return !(tag & (1 << (tformat->rsvd_bits + tformat->rsvd_shift - 1))); | |
589 | } | |
590 | ||
591 | static inline int cxgbi_sw_tag_usable(struct cxgbi_tag_format *tformat, | |
592 | u32 sw_tag) | |
593 | { | |
594 | sw_tag >>= (32 - tformat->rsvd_bits); | |
595 | return !sw_tag; | |
596 | } | |
597 | ||
598 | static inline u32 cxgbi_set_non_ddp_tag(struct cxgbi_tag_format *tformat, | |
599 | u32 sw_tag) | |
600 | { | |
601 | unsigned char shift = tformat->rsvd_bits + tformat->rsvd_shift - 1; | |
602 | u32 mask = (1 << shift) - 1; | |
603 | ||
604 | if (sw_tag && (sw_tag & ~mask)) { | |
605 | u32 v1 = sw_tag & ((1 << shift) - 1); | |
606 | u32 v2 = (sw_tag >> (shift - 1)) << shift; | |
607 | ||
608 | return v2 | v1 | 1 << shift; | |
609 | } | |
610 | ||
611 | return sw_tag | 1 << shift; | |
612 | } | |
613 | ||
614 | static inline u32 cxgbi_ddp_tag_base(struct cxgbi_tag_format *tformat, | |
615 | u32 sw_tag) | |
616 | { | |
617 | u32 mask = (1 << tformat->rsvd_shift) - 1; | |
618 | ||
619 | if (sw_tag && (sw_tag & ~mask)) { | |
620 | u32 v1 = sw_tag & mask; | |
621 | u32 v2 = sw_tag >> tformat->rsvd_shift; | |
622 | ||
623 | v2 <<= tformat->rsvd_bits + tformat->rsvd_shift; | |
624 | ||
625 | return v2 | v1; | |
626 | } | |
627 | ||
628 | return sw_tag; | |
629 | } | |
630 | ||
631 | static inline u32 cxgbi_tag_rsvd_bits(struct cxgbi_tag_format *tformat, | |
632 | u32 tag) | |
633 | { | |
634 | if (cxgbi_is_ddp_tag(tformat, tag)) | |
635 | return (tag >> tformat->rsvd_shift) & tformat->rsvd_mask; | |
636 | ||
637 | return 0; | |
638 | } | |
639 | ||
640 | static inline u32 cxgbi_tag_nonrsvd_bits(struct cxgbi_tag_format *tformat, | |
641 | u32 tag) | |
642 | { | |
643 | unsigned char shift = tformat->rsvd_bits + tformat->rsvd_shift - 1; | |
644 | u32 v1, v2; | |
645 | ||
646 | if (cxgbi_is_ddp_tag(tformat, tag)) { | |
647 | v1 = tag & ((1 << tformat->rsvd_shift) - 1); | |
648 | v2 = (tag >> (shift + 1)) << tformat->rsvd_shift; | |
649 | } else { | |
650 | u32 mask = (1 << shift) - 1; | |
651 | tag &= ~(1 << shift); | |
652 | v1 = tag & mask; | |
653 | v2 = (tag >> 1) & ~mask; | |
654 | } | |
655 | return v1 | v2; | |
656 | } | |
657 | ||
658 | static inline void *cxgbi_alloc_big_mem(unsigned int size, | |
659 | gfp_t gfp) | |
660 | { | |
661 | void *p = kmalloc(size, gfp); | |
662 | if (!p) | |
663 | p = vmalloc(size); | |
664 | if (p) | |
665 | memset(p, 0, size); | |
666 | return p; | |
667 | } | |
668 | ||
669 | static inline void cxgbi_free_big_mem(void *addr) | |
670 | { | |
671 | if (is_vmalloc_addr(addr)) | |
672 | vfree(addr); | |
673 | else | |
674 | kfree(addr); | |
675 | } | |
676 | ||
677 | static inline void cxgbi_set_iscsi_ipv4(struct cxgbi_hba *chba, __be32 ipaddr) | |
678 | { | |
679 | if (chba->cdev->flags & CXGBI_FLAG_IPV4_SET) | |
680 | chba->ipv4addr = ipaddr; | |
681 | else | |
682 | pr_info("set iscsi ipv4 NOT supported, using %s ipv4.\n", | |
683 | chba->ndev->name); | |
684 | } | |
685 | ||
686 | static inline __be32 cxgbi_get_iscsi_ipv4(struct cxgbi_hba *chba) | |
687 | { | |
688 | return chba->ipv4addr; | |
689 | } | |
690 | ||
691 | struct cxgbi_device *cxgbi_device_register(unsigned int, unsigned int); | |
692 | void cxgbi_device_unregister(struct cxgbi_device *); | |
693 | void cxgbi_device_unregister_all(unsigned int flag); | |
694 | struct cxgbi_device *cxgbi_device_find_by_lldev(void *); | |
695 | int cxgbi_hbas_add(struct cxgbi_device *, unsigned int, unsigned int, | |
696 | struct scsi_host_template *, | |
697 | struct scsi_transport_template *); | |
698 | void cxgbi_hbas_remove(struct cxgbi_device *); | |
699 | ||
700 | int cxgbi_device_portmap_create(struct cxgbi_device *cdev, unsigned int base, | |
701 | unsigned int max_conn); | |
702 | void cxgbi_device_portmap_cleanup(struct cxgbi_device *cdev); | |
703 | ||
704 | void cxgbi_conn_tx_open(struct cxgbi_sock *); | |
705 | void cxgbi_conn_pdu_ready(struct cxgbi_sock *); | |
706 | int cxgbi_conn_alloc_pdu(struct iscsi_task *, u8); | |
707 | int cxgbi_conn_init_pdu(struct iscsi_task *, unsigned int , unsigned int); | |
708 | int cxgbi_conn_xmit_pdu(struct iscsi_task *); | |
709 | ||
710 | void cxgbi_cleanup_task(struct iscsi_task *task); | |
711 | ||
587a1f16 | 712 | umode_t cxgbi_attr_is_visible(int param_type, int param); |
9ba682f0 | 713 | void cxgbi_get_conn_stats(struct iscsi_cls_conn *, struct iscsi_stats *); |
714 | int cxgbi_set_conn_param(struct iscsi_cls_conn *, | |
715 | enum iscsi_param, char *, int); | |
c71b9b66 | 716 | int cxgbi_get_ep_param(struct iscsi_endpoint *ep, enum iscsi_param, char *); |
9ba682f0 | 717 | struct iscsi_cls_conn *cxgbi_create_conn(struct iscsi_cls_session *, u32); |
718 | int cxgbi_bind_conn(struct iscsi_cls_session *, | |
719 | struct iscsi_cls_conn *, u64, int); | |
720 | void cxgbi_destroy_session(struct iscsi_cls_session *); | |
721 | struct iscsi_cls_session *cxgbi_create_session(struct iscsi_endpoint *, | |
722 | u16, u16, u32); | |
723 | int cxgbi_set_host_param(struct Scsi_Host *, | |
724 | enum iscsi_host_param, char *, int); | |
725 | int cxgbi_get_host_param(struct Scsi_Host *, enum iscsi_host_param, char *); | |
726 | struct iscsi_endpoint *cxgbi_ep_connect(struct Scsi_Host *, | |
727 | struct sockaddr *, int); | |
728 | int cxgbi_ep_poll(struct iscsi_endpoint *, int); | |
729 | void cxgbi_ep_disconnect(struct iscsi_endpoint *); | |
730 | ||
731 | int cxgbi_iscsi_init(struct iscsi_transport *, | |
732 | struct scsi_transport_template **); | |
733 | void cxgbi_iscsi_cleanup(struct iscsi_transport *, | |
734 | struct scsi_transport_template **); | |
735 | void cxgbi_parse_pdu_itt(struct iscsi_conn *, itt_t, int *, int *); | |
736 | int cxgbi_ddp_init(struct cxgbi_device *, unsigned int, unsigned int, | |
737 | unsigned int, unsigned int); | |
738 | int cxgbi_ddp_cleanup(struct cxgbi_device *); | |
739 | void cxgbi_ddp_page_size_factor(int *); | |
740 | void cxgbi_ddp_ppod_clear(struct cxgbi_pagepod *); | |
741 | void cxgbi_ddp_ppod_set(struct cxgbi_pagepod *, struct cxgbi_pagepod_hdr *, | |
742 | struct cxgbi_gather_list *, unsigned int); | |
743 | #endif /*__LIBCXGBI_H__*/ |