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Merge branch 'sfi' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux into...
[deliverable/linux.git] / drivers / scsi / cxgbi / libcxgbi.h
CommitLineData
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
30enum 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...) \
49do { \
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 */
81static const unsigned int ulp2_extra_len[] = { 0, 4, 4, 8 };
82static 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
96struct 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
105struct cxgbi_pagepod {
106 struct cxgbi_pagepod_hdr hdr;
107 u64 addr[PPOD_PAGES_MAX + 1];
108};
109
110struct 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
118struct 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
127struct 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 */
178struct sge_opaque_hdr {
179 void *dev;
180 dma_addr_t addr[MAX_SKB_FRAGS + 1];
181};
182
183struct 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;
237};
238
239/*
240 * connection states
241 */
242enum cxgbi_sock_states{
243 CTP_CLOSED,
244 CTP_CONNECTING,
245 CTP_ACTIVE_OPEN,
246 CTP_ESTABLISHED,
247 CTP_ACTIVE_CLOSE,
248 CTP_PASSIVE_CLOSE,
249 CTP_CLOSE_WAIT_1,
250 CTP_CLOSE_WAIT_2,
251 CTP_ABORTING,
252};
253
254/*
255 * Connection flags -- many to track some close related events.
256 */
257enum cxgbi_sock_flags {
258 CTPF_ABORT_RPL_RCVD, /*received one ABORT_RPL_RSS message */
259 CTPF_ABORT_REQ_RCVD, /*received one ABORT_REQ_RSS message */
260 CTPF_ABORT_RPL_PENDING, /* expecting an abort reply */
261 CTPF_TX_DATA_SENT, /* already sent a TX_DATA WR */
262 CTPF_ACTIVE_CLOSE_NEEDED,/* need to be closed */
263 CTPF_HAS_ATID, /* reserved atid */
264 CTPF_HAS_TID, /* reserved hw tid */
265 CTPF_OFFLOAD_DOWN, /* offload function off */
266};
267
268struct cxgbi_skb_rx_cb {
269 __u32 ddigest;
270 __u32 pdulen;
271};
272
273struct cxgbi_skb_tx_cb {
274 void *l2t;
275 struct sk_buff *wr_next;
276};
277
278enum cxgbi_skcb_flags {
279 SKCBF_TX_NEED_HDR, /* packet needs a header */
280 SKCBF_RX_COALESCED, /* received whole pdu */
25985edc
LDM		 281 SKCBF_RX_HDR, /* received pdu header */
282 SKCBF_RX_DATA, /* received pdu payload */
283 SKCBF_RX_STATUS, /* received ddp status */
9ba682f0 284 SKCBF_RX_DATA_DDPD, /* pdu payload ddp'd */
285 SKCBF_RX_HCRC_ERR, /* header digest error */
286 SKCBF_RX_DCRC_ERR, /* data digest error */
287 SKCBF_RX_PAD_ERR, /* padding byte error */
288};
289
290struct cxgbi_skb_cb {
291 unsigned char ulp_mode;
292 unsigned long flags;
293 unsigned int seq;
294 union {
295 struct cxgbi_skb_rx_cb rx;
296 struct cxgbi_skb_tx_cb tx;
297 };
298};
299
300#define CXGBI_SKB_CB(skb) ((struct cxgbi_skb_cb *)&((skb)->cb[0]))
301#define cxgbi_skcb_flags(skb) (CXGBI_SKB_CB(skb)->flags)
302#define cxgbi_skcb_ulp_mode(skb) (CXGBI_SKB_CB(skb)->ulp_mode)
303#define cxgbi_skcb_tcp_seq(skb) (CXGBI_SKB_CB(skb)->seq)
304#define cxgbi_skcb_rx_ddigest(skb) (CXGBI_SKB_CB(skb)->rx.ddigest)
305#define cxgbi_skcb_rx_pdulen(skb) (CXGBI_SKB_CB(skb)->rx.pdulen)
306#define cxgbi_skcb_tx_wr_next(skb) (CXGBI_SKB_CB(skb)->tx.wr_next)
307
308static inline void cxgbi_skcb_set_flag(struct sk_buff *skb,
309 enum cxgbi_skcb_flags flag)
310{
311 __set_bit(flag, &(cxgbi_skcb_flags(skb)));
312}
313
314static inline void cxgbi_skcb_clear_flag(struct sk_buff *skb,
315 enum cxgbi_skcb_flags flag)
316{
317 __clear_bit(flag, &(cxgbi_skcb_flags(skb)));
318}
319
84944d8c
KX		 320static inline int cxgbi_skcb_test_flag(const struct sk_buff *skb,
321 enum cxgbi_skcb_flags flag)
9ba682f0 322{
323 return test_bit(flag, &(cxgbi_skcb_flags(skb)));
324}
325
326static inline void cxgbi_sock_set_flag(struct cxgbi_sock *csk,
327 enum cxgbi_sock_flags flag)
328{
329 __set_bit(flag, &csk->flags);
330 log_debug(1 << CXGBI_DBG_SOCK,
331 "csk 0x%p,%u,0x%lx, bit %d.\n",
332 csk, csk->state, csk->flags, flag);
333}
334
335static inline void cxgbi_sock_clear_flag(struct cxgbi_sock *csk,
336 enum cxgbi_sock_flags flag)
337{
338 __clear_bit(flag, &csk->flags);
339 log_debug(1 << CXGBI_DBG_SOCK,
340 "csk 0x%p,%u,0x%lx, bit %d.\n",
341 csk, csk->state, csk->flags, flag);
342}
343
344static inline int cxgbi_sock_flag(struct cxgbi_sock *csk,
345 enum cxgbi_sock_flags flag)
346{
347 if (csk == NULL)
348 return 0;
349 return test_bit(flag, &csk->flags);
350}
351
352static inline void cxgbi_sock_set_state(struct cxgbi_sock *csk, int state)
353{
354 log_debug(1 << CXGBI_DBG_SOCK,
355 "csk 0x%p,%u,0x%lx, state -> %u.\n",
356 csk, csk->state, csk->flags, state);
357 csk->state = state;
358}
359
360static inline void cxgbi_sock_free(struct kref *kref)
361{
362 struct cxgbi_sock *csk = container_of(kref,
363 struct cxgbi_sock,
364 refcnt);
365 if (csk) {
366 log_debug(1 << CXGBI_DBG_SOCK,
367 "free csk 0x%p, state %u, flags 0x%lx\n",
368 csk, csk->state, csk->flags);
369 kfree(csk);
370 }
371}
372
373static inline void __cxgbi_sock_put(const char *fn, struct cxgbi_sock *csk)
374{
375 log_debug(1 << CXGBI_DBG_SOCK,
376 "%s, put csk 0x%p, ref %u-1.\n",
377 fn, csk, atomic_read(&csk->refcnt.refcount));
378 kref_put(&csk->refcnt, cxgbi_sock_free);
379}
380#define cxgbi_sock_put(csk) __cxgbi_sock_put(__func__, csk)
381
382static inline void __cxgbi_sock_get(const char *fn, struct cxgbi_sock *csk)
383{
384 log_debug(1 << CXGBI_DBG_SOCK,
385 "%s, get csk 0x%p, ref %u+1.\n",
386 fn, csk, atomic_read(&csk->refcnt.refcount));
387 kref_get(&csk->refcnt);
388}
389#define cxgbi_sock_get(csk) __cxgbi_sock_get(__func__, csk)
390
391static inline int cxgbi_sock_is_closing(struct cxgbi_sock *csk)
392{
393 return csk->state >= CTP_ACTIVE_CLOSE;
394}
395
396static inline int cxgbi_sock_is_established(struct cxgbi_sock *csk)
397{
398 return csk->state == CTP_ESTABLISHED;
399}
400
401static inline void cxgbi_sock_purge_write_queue(struct cxgbi_sock *csk)
402{
403 struct sk_buff *skb;
404
405 while ((skb = __skb_dequeue(&csk->write_queue)))
406 __kfree_skb(skb);
407}
408
409static inline unsigned int cxgbi_sock_compute_wscale(unsigned int win)
410{
411 unsigned int wscale = 0;
412
413 while (wscale < 14 && (65535 << wscale) < win)
414 wscale++;
415 return wscale;
416}
417
24d3f95a 418static inline struct sk_buff *alloc_wr(int wrlen, int dlen, gfp_t gfp)
9ba682f0 419{
9ba682f0 420 struct sk_buff *skb = alloc_skb(wrlen + dlen, gfp);
421
422 if (skb) {
423 __skb_put(skb, wrlen);
424 memset(skb->head, 0, wrlen + dlen);
425 } else
24d3f95a 426 pr_info("alloc cpl wr skb %u+%u, OOM.\n", wrlen, dlen);
9ba682f0 427 return skb;
428}
429
430
431/*
432 * The number of WRs needed for an skb depends on the number of fragments
433 * in the skb and whether it has any payload in its main body. This maps the
434 * length of the gather list represented by an skb into the # of necessary WRs.
435 * The extra two fragments are for iscsi bhs and payload padding.
436 */
437#define SKB_WR_LIST_SIZE (MAX_SKB_FRAGS + 2)
438
439static inline void cxgbi_sock_reset_wr_list(struct cxgbi_sock *csk)
440{
441 csk->wr_pending_head = csk->wr_pending_tail = NULL;
442}
443
444static inline void cxgbi_sock_enqueue_wr(struct cxgbi_sock *csk,
445 struct sk_buff *skb)
446{
447 cxgbi_skcb_tx_wr_next(skb) = NULL;
448 /*
449 * We want to take an extra reference since both us and the driver
450 * need to free the packet before it's really freed. We know there's
451 * just one user currently so we use atomic_set rather than skb_get
452 * to avoid the atomic op.
453 */
454 atomic_set(&skb->users, 2);
455
456 if (!csk->wr_pending_head)
457 csk->wr_pending_head = skb;
458 else
459 cxgbi_skcb_tx_wr_next(csk->wr_pending_tail) = skb;
460 csk->wr_pending_tail = skb;
461}
462
463static inline int cxgbi_sock_count_pending_wrs(const struct cxgbi_sock *csk)
464{
465 int n = 0;
466 const struct sk_buff *skb = csk->wr_pending_head;
467
468 while (skb) {
469 n += skb->csum;
470 skb = cxgbi_skcb_tx_wr_next(skb);
471 }
472 return n;
473}
474
475static inline struct sk_buff *cxgbi_sock_peek_wr(const struct cxgbi_sock *csk)
476{
477 return csk->wr_pending_head;
478}
479
480static inline struct sk_buff *cxgbi_sock_dequeue_wr(struct cxgbi_sock *csk)
481{
482 struct sk_buff *skb = csk->wr_pending_head;
483
484 if (likely(skb)) {
485 csk->wr_pending_head = cxgbi_skcb_tx_wr_next(skb);
486 cxgbi_skcb_tx_wr_next(skb) = NULL;
487 }
488 return skb;
489}
490
491void cxgbi_sock_check_wr_invariants(const struct cxgbi_sock *);
492void cxgbi_sock_purge_wr_queue(struct cxgbi_sock *);
493void cxgbi_sock_skb_entail(struct cxgbi_sock *, struct sk_buff *);
494void cxgbi_sock_fail_act_open(struct cxgbi_sock *, int);
495void cxgbi_sock_act_open_req_arp_failure(void *, struct sk_buff *);
496void cxgbi_sock_closed(struct cxgbi_sock *);
497void cxgbi_sock_established(struct cxgbi_sock *, unsigned int, unsigned int);
498void cxgbi_sock_rcv_abort_rpl(struct cxgbi_sock *);
499void cxgbi_sock_rcv_peer_close(struct cxgbi_sock *);
500void cxgbi_sock_rcv_close_conn_rpl(struct cxgbi_sock *, u32);
501void cxgbi_sock_rcv_wr_ack(struct cxgbi_sock *, unsigned int, unsigned int,
502 int);
503unsigned int cxgbi_sock_select_mss(struct cxgbi_sock *, unsigned int);
504void cxgbi_sock_free_cpl_skbs(struct cxgbi_sock *);
505
506struct cxgbi_hba {
507 struct net_device *ndev;
0b3d8947 508 struct net_device *vdev; /* vlan dev */
9ba682f0 509 struct Scsi_Host *shost;
510 struct cxgbi_device *cdev;
511 __be32 ipv4addr;
512 unsigned char port_id;
513};
514
515struct cxgbi_ports_map {
516 unsigned int max_connect;
517 unsigned int used;
518 unsigned short sport_base;
519 spinlock_t lock;
520 unsigned int next;
521 struct cxgbi_sock **port_csk;
522};
523
524#define CXGBI_FLAG_DEV_T3 0x1
525#define CXGBI_FLAG_DEV_T4 0x2
526#define CXGBI_FLAG_ADAPTER_RESET 0x4
527#define CXGBI_FLAG_IPV4_SET 0x10
528struct cxgbi_device {
529 struct list_head list_head;
078efae0 530 struct list_head rcu_node;
9ba682f0 531 unsigned int flags;
532 struct net_device **ports;
533 void *lldev;
534 struct cxgbi_hba **hbas;
535 const unsigned short *mtus;
536 unsigned char nmtus;
537 unsigned char nports;
538 struct pci_dev *pdev;
539 struct dentry *debugfs_root;
540 struct iscsi_transport *itp;
541
542 unsigned int pfvf;
543 unsigned int snd_win;
544 unsigned int rcv_win;
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
578struct cxgbi_conn {
579 struct cxgbi_endpoint *cep;
580 struct iscsi_conn *iconn;
581 struct cxgbi_hba *chba;
582 u32 task_idx_bits;
583};
584
585struct 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)
592struct 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
603static 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
608static 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
615static 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
631static 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
648static 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
657static 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
675static 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
686static 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
694static 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 703struct cxgbi_device *cxgbi_device_register(unsigned int, unsigned int);
704void cxgbi_device_unregister(struct cxgbi_device *);
705void cxgbi_device_unregister_all(unsigned int flag);
706struct cxgbi_device *cxgbi_device_find_by_lldev(void *);
fc8d0590 707struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *, int *);
078efae0
AB		 708struct cxgbi_device *cxgbi_device_find_by_netdev_rcu(struct net_device *,
709 int *);
1abf635d 710int cxgbi_hbas_add(struct cxgbi_device *, u64, unsigned int,
9ba682f0 711 struct scsi_host_template *,
712 struct scsi_transport_template *);
713void cxgbi_hbas_remove(struct cxgbi_device *);
714
715int cxgbi_device_portmap_create(struct cxgbi_device *cdev, unsigned int base,
716 unsigned int max_conn);
717void cxgbi_device_portmap_cleanup(struct cxgbi_device *cdev);
718
719void cxgbi_conn_tx_open(struct cxgbi_sock *);
720void cxgbi_conn_pdu_ready(struct cxgbi_sock *);
721int cxgbi_conn_alloc_pdu(struct iscsi_task *, u8);
722int cxgbi_conn_init_pdu(struct iscsi_task *, unsigned int , unsigned int);
723int cxgbi_conn_xmit_pdu(struct iscsi_task *);
724
725void cxgbi_cleanup_task(struct iscsi_task *task);
726
587a1f16 727umode_t cxgbi_attr_is_visible(int param_type, int param);
9ba682f0 728void cxgbi_get_conn_stats(struct iscsi_cls_conn *, struct iscsi_stats *);
729int cxgbi_set_conn_param(struct iscsi_cls_conn *,
730 enum iscsi_param, char *, int);
c71b9b66 731int cxgbi_get_ep_param(struct iscsi_endpoint *ep, enum iscsi_param, char *);
9ba682f0 732struct iscsi_cls_conn *cxgbi_create_conn(struct iscsi_cls_session *, u32);
733int cxgbi_bind_conn(struct iscsi_cls_session *,
734 struct iscsi_cls_conn *, u64, int);
735void cxgbi_destroy_session(struct iscsi_cls_session *);
736struct iscsi_cls_session *cxgbi_create_session(struct iscsi_endpoint *,
737 u16, u16, u32);
738int cxgbi_set_host_param(struct Scsi_Host *,
739 enum iscsi_host_param, char *, int);
740int cxgbi_get_host_param(struct Scsi_Host *, enum iscsi_host_param, char *);
741struct iscsi_endpoint *cxgbi_ep_connect(struct Scsi_Host *,
742 struct sockaddr *, int);
743int cxgbi_ep_poll(struct iscsi_endpoint *, int);
744void cxgbi_ep_disconnect(struct iscsi_endpoint *);
745
746int cxgbi_iscsi_init(struct iscsi_transport *,
747 struct scsi_transport_template **);
748void cxgbi_iscsi_cleanup(struct iscsi_transport *,
749 struct scsi_transport_template **);
750void cxgbi_parse_pdu_itt(struct iscsi_conn *, itt_t, int *, int *);
751int cxgbi_ddp_init(struct cxgbi_device *, unsigned int, unsigned int,
752 unsigned int, unsigned int);
753int cxgbi_ddp_cleanup(struct cxgbi_device *);
754void cxgbi_ddp_page_size_factor(int *);
755void cxgbi_ddp_ppod_clear(struct cxgbi_pagepod *);
756void cxgbi_ddp_ppod_set(struct cxgbi_pagepod *, struct cxgbi_pagepod_hdr *,
757 struct cxgbi_gather_list *, unsigned int);
758#endif /*__LIBCXGBI_H__*/
Linux kernel - Deliverables
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