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