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-rw-r--r--drivers/scsi/cxgbi/libcxgbi.h745
1 files changed, 745 insertions, 0 deletions
diff --git a/drivers/scsi/cxgbi/libcxgbi.h b/drivers/scsi/cxgbi/libcxgbi.h
new file mode 100644
index 000000000000..c57d59db000c
--- /dev/null
+++ b/drivers/scsi/cxgbi/libcxgbi.h
@@ -0,0 +1,745 @@
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
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 */
72static const unsigned int ulp2_extra_len[] = { 0, 4, 4, 8 };
73static 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
87struct 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
96struct cxgbi_pagepod {
97 struct cxgbi_pagepod_hdr hdr;
98 u64 addr[PPOD_PAGES_MAX + 1];
99};
100
101struct 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
109struct 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
118struct 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/*
166 * sge_opaque_hdr -
167 * Opaque version of structure the SGE stores at skb->head of TX_DATA packets
168 * and for which we must reserve space.
169 */
170struct sge_opaque_hdr {
171 void *dev;
172 dma_addr_t addr[MAX_SKB_FRAGS + 1];
173};
174
175struct cxgbi_sock {
176 struct cxgbi_device *cdev;
177
178 int tid;
179 int atid;
180 unsigned long flags;
181 unsigned int mtu;
182 unsigned short rss_qid;
183 unsigned short txq_idx;
184 unsigned short advmss;
185 unsigned int tx_chan;
186 unsigned int rx_chan;
187 unsigned int mss_idx;
188 unsigned int smac_idx;
189 unsigned char port_id;
190 int wr_max_cred;
191 int wr_cred;
192 int wr_una_cred;
193 unsigned char hcrc_len;
194 unsigned char dcrc_len;
195
196 void *l2t;
197 struct sk_buff *wr_pending_head;
198 struct sk_buff *wr_pending_tail;
199 struct sk_buff *cpl_close;
200 struct sk_buff *cpl_abort_req;
201 struct sk_buff *cpl_abort_rpl;
202 struct sk_buff *skb_ulp_lhdr;
203 spinlock_t lock;
204 struct kref refcnt;
205 unsigned int state;
206 struct sockaddr_in saddr;
207 struct sockaddr_in daddr;
208 struct dst_entry *dst;
209 struct sk_buff_head receive_queue;
210 struct sk_buff_head write_queue;
211 struct timer_list retry_timer;
212 int err;
213 rwlock_t callback_lock;
214 void *user_data;
215
216 u32 rcv_nxt;
217 u32 copied_seq;
218 u32 rcv_wup;
219 u32 snd_nxt;
220 u32 snd_una;
221 u32 write_seq;
222};
223
224/*
225 * connection states
226 */
227enum cxgbi_sock_states{
228 CTP_CLOSED,
229 CTP_CONNECTING,
230 CTP_ACTIVE_OPEN,
231 CTP_ESTABLISHED,
232 CTP_ACTIVE_CLOSE,
233 CTP_PASSIVE_CLOSE,
234 CTP_CLOSE_WAIT_1,
235 CTP_CLOSE_WAIT_2,
236 CTP_ABORTING,
237};
238
239/*
240 * Connection flags -- many to track some close related events.
241 */
242enum cxgbi_sock_flags {
243 CTPF_ABORT_RPL_RCVD, /*received one ABORT_RPL_RSS message */
244 CTPF_ABORT_REQ_RCVD, /*received one ABORT_REQ_RSS message */
245 CTPF_ABORT_RPL_PENDING, /* expecting an abort reply */
246 CTPF_TX_DATA_SENT, /* already sent a TX_DATA WR */
247 CTPF_ACTIVE_CLOSE_NEEDED,/* need to be closed */
248 CTPF_HAS_ATID, /* reserved atid */
249 CTPF_HAS_TID, /* reserved hw tid */
250 CTPF_OFFLOAD_DOWN, /* offload function off */
251};
252
253struct cxgbi_skb_rx_cb {
254 __u32 ddigest;
255 __u32 pdulen;
256};
257
258struct cxgbi_skb_tx_cb {
259 void *l2t;
260 struct sk_buff *wr_next;
261};
262
263enum cxgbi_skcb_flags {
264 SKCBF_TX_NEED_HDR, /* packet needs a header */
265 SKCBF_RX_COALESCED, /* received whole pdu */
266 SKCBF_RX_HDR, /* recieved pdu header */
267 SKCBF_RX_DATA, /* recieved pdu payload */
268 SKCBF_RX_STATUS, /* recieved ddp status */
269 SKCBF_RX_DATA_DDPD, /* pdu payload ddp'd */
270 SKCBF_RX_HCRC_ERR, /* header digest error */
271 SKCBF_RX_DCRC_ERR, /* data digest error */
272 SKCBF_RX_PAD_ERR, /* padding byte error */
273};
274
275struct cxgbi_skb_cb {
276 unsigned char ulp_mode;
277 unsigned long flags;
278 unsigned int seq;
279 union {
280 struct cxgbi_skb_rx_cb rx;
281 struct cxgbi_skb_tx_cb tx;
282 };
283};
284
285#define CXGBI_SKB_CB(skb) ((struct cxgbi_skb_cb *)&((skb)->cb[0]))
286#define cxgbi_skcb_flags(skb) (CXGBI_SKB_CB(skb)->flags)
287#define cxgbi_skcb_ulp_mode(skb) (CXGBI_SKB_CB(skb)->ulp_mode)
288#define cxgbi_skcb_tcp_seq(skb) (CXGBI_SKB_CB(skb)->seq)
289#define cxgbi_skcb_rx_ddigest(skb) (CXGBI_SKB_CB(skb)->rx.ddigest)
290#define cxgbi_skcb_rx_pdulen(skb) (CXGBI_SKB_CB(skb)->rx.pdulen)
291#define cxgbi_skcb_tx_wr_next(skb) (CXGBI_SKB_CB(skb)->tx.wr_next)
292
293static inline void cxgbi_skcb_set_flag(struct sk_buff *skb,
294 enum cxgbi_skcb_flags flag)
295{
296 __set_bit(flag, &(cxgbi_skcb_flags(skb)));
297}
298
299static inline void cxgbi_skcb_clear_flag(struct sk_buff *skb,
300 enum cxgbi_skcb_flags flag)
301{
302 __clear_bit(flag, &(cxgbi_skcb_flags(skb)));
303}
304
305static inline int cxgbi_skcb_test_flag(struct sk_buff *skb,
306 enum cxgbi_skcb_flags flag)
307{
308 return test_bit(flag, &(cxgbi_skcb_flags(skb)));
309}
310
311static inline void cxgbi_sock_set_flag(struct cxgbi_sock *csk,
312 enum cxgbi_sock_flags flag)
313{
314 __set_bit(flag, &csk->flags);
315 log_debug(1 << CXGBI_DBG_SOCK,
316 "csk 0x%p,%u,0x%lx, bit %d.\n",
317 csk, csk->state, csk->flags, flag);
318}
319
320static inline void cxgbi_sock_clear_flag(struct cxgbi_sock *csk,
321 enum cxgbi_sock_flags flag)
322{
323 __clear_bit(flag, &csk->flags);
324 log_debug(1 << CXGBI_DBG_SOCK,
325 "csk 0x%p,%u,0x%lx, bit %d.\n",
326 csk, csk->state, csk->flags, flag);
327}
328
329static inline int cxgbi_sock_flag(struct cxgbi_sock *csk,
330 enum cxgbi_sock_flags flag)
331{
332 if (csk == NULL)
333 return 0;
334 return test_bit(flag, &csk->flags);
335}
336
337static inline void cxgbi_sock_set_state(struct cxgbi_sock *csk, int state)
338{
339 log_debug(1 << CXGBI_DBG_SOCK,
340 "csk 0x%p,%u,0x%lx, state -> %u.\n",
341 csk, csk->state, csk->flags, state);
342 csk->state = state;
343}
344
345static inline void cxgbi_sock_free(struct kref *kref)
346{
347 struct cxgbi_sock *csk = container_of(kref,
348 struct cxgbi_sock,
349 refcnt);
350 if (csk) {
351 log_debug(1 << CXGBI_DBG_SOCK,
352 "free csk 0x%p, state %u, flags 0x%lx\n",
353 csk, csk->state, csk->flags);
354 kfree(csk);
355 }
356}
357
358static inline void __cxgbi_sock_put(const char *fn, struct cxgbi_sock *csk)
359{
360 log_debug(1 << CXGBI_DBG_SOCK,
361 "%s, put csk 0x%p, ref %u-1.\n",
362 fn, csk, atomic_read(&csk->refcnt.refcount));
363 kref_put(&csk->refcnt, cxgbi_sock_free);
364}
365#define cxgbi_sock_put(csk) __cxgbi_sock_put(__func__, csk)
366
367static inline void __cxgbi_sock_get(const char *fn, struct cxgbi_sock *csk)
368{
369 log_debug(1 << CXGBI_DBG_SOCK,
370 "%s, get csk 0x%p, ref %u+1.\n",
371 fn, csk, atomic_read(&csk->refcnt.refcount));
372 kref_get(&csk->refcnt);
373}
374#define cxgbi_sock_get(csk) __cxgbi_sock_get(__func__, csk)
375
376static inline int cxgbi_sock_is_closing(struct cxgbi_sock *csk)
377{
378 return csk->state >= CTP_ACTIVE_CLOSE;
379}
380
381static inline int cxgbi_sock_is_established(struct cxgbi_sock *csk)
382{
383 return csk->state == CTP_ESTABLISHED;
384}
385
386static inline void cxgbi_sock_purge_write_queue(struct cxgbi_sock *csk)
387{
388 struct sk_buff *skb;
389
390 while ((skb = __skb_dequeue(&csk->write_queue)))
391 __kfree_skb(skb);
392}
393
394static inline unsigned int cxgbi_sock_compute_wscale(unsigned int win)
395{
396 unsigned int wscale = 0;
397
398 while (wscale < 14 && (65535 << wscale) < win)
399 wscale++;
400 return wscale;
401}
402
403static inline struct sk_buff *alloc_wr(int wrlen, int dlen, gfp_t gfp)
404{
405 struct sk_buff *skb = alloc_skb(wrlen + dlen, gfp);
406
407 if (skb) {
408 __skb_put(skb, wrlen);
409 memset(skb->head, 0, wrlen + dlen);
410 } else
411 pr_info("alloc cpl wr skb %u+%u, OOM.\n", wrlen, dlen);
412 return skb;
413}
414
415
416/*
417 * The number of WRs needed for an skb depends on the number of fragments
418 * in the skb and whether it has any payload in its main body. This maps the
419 * length of the gather list represented by an skb into the # of necessary WRs.
420 * The extra two fragments are for iscsi bhs and payload padding.
421 */
422#define SKB_WR_LIST_SIZE (MAX_SKB_FRAGS + 2)
423
424static inline void cxgbi_sock_reset_wr_list(struct cxgbi_sock *csk)
425{
426 csk->wr_pending_head = csk->wr_pending_tail = NULL;
427}
428
429static inline void cxgbi_sock_enqueue_wr(struct cxgbi_sock *csk,
430 struct sk_buff *skb)
431{
432 cxgbi_skcb_tx_wr_next(skb) = NULL;
433 /*
434 * We want to take an extra reference since both us and the driver
435 * need to free the packet before it's really freed. We know there's
436 * just one user currently so we use atomic_set rather than skb_get
437 * to avoid the atomic op.
438 */
439 atomic_set(&skb->users, 2);
440
441 if (!csk->wr_pending_head)
442 csk->wr_pending_head = skb;
443 else
444 cxgbi_skcb_tx_wr_next(csk->wr_pending_tail) = skb;
445 csk->wr_pending_tail = skb;
446}
447
448static inline int cxgbi_sock_count_pending_wrs(const struct cxgbi_sock *csk)
449{
450 int n = 0;
451 const struct sk_buff *skb = csk->wr_pending_head;
452
453 while (skb) {
454 n += skb->csum;
455 skb = cxgbi_skcb_tx_wr_next(skb);
456 }
457 return n;
458}
459
460static inline struct sk_buff *cxgbi_sock_peek_wr(const struct cxgbi_sock *csk)
461{
462 return csk->wr_pending_head;
463}
464
465static inline struct sk_buff *cxgbi_sock_dequeue_wr(struct cxgbi_sock *csk)
466{
467 struct sk_buff *skb = csk->wr_pending_head;
468
469 if (likely(skb)) {
470 csk->wr_pending_head = cxgbi_skcb_tx_wr_next(skb);
471 cxgbi_skcb_tx_wr_next(skb) = NULL;
472 }
473 return skb;
474}
475
476void cxgbi_sock_check_wr_invariants(const struct cxgbi_sock *);
477void cxgbi_sock_purge_wr_queue(struct cxgbi_sock *);
478void cxgbi_sock_skb_entail(struct cxgbi_sock *, struct sk_buff *);
479void cxgbi_sock_fail_act_open(struct cxgbi_sock *, int);
480void cxgbi_sock_act_open_req_arp_failure(void *, struct sk_buff *);
481void cxgbi_sock_closed(struct cxgbi_sock *);
482void cxgbi_sock_established(struct cxgbi_sock *, unsigned int, unsigned int);
483void cxgbi_sock_rcv_abort_rpl(struct cxgbi_sock *);
484void cxgbi_sock_rcv_peer_close(struct cxgbi_sock *);
485void cxgbi_sock_rcv_close_conn_rpl(struct cxgbi_sock *, u32);
486void cxgbi_sock_rcv_wr_ack(struct cxgbi_sock *, unsigned int, unsigned int,
487 int);
488unsigned int cxgbi_sock_select_mss(struct cxgbi_sock *, unsigned int);
489void cxgbi_sock_free_cpl_skbs(struct cxgbi_sock *);
490
491struct cxgbi_hba {
492 struct net_device *ndev;
493 struct net_device *vdev; /* vlan dev */
494 struct Scsi_Host *shost;
495 struct cxgbi_device *cdev;
496 __be32 ipv4addr;
497 unsigned char port_id;
498};
499
500struct cxgbi_ports_map {
501 unsigned int max_connect;
502 unsigned int used;
503 unsigned short sport_base;
504 spinlock_t lock;
505 unsigned int next;
506 struct cxgbi_sock **port_csk;
507};
508
509#define CXGBI_FLAG_DEV_T3 0x1
510#define CXGBI_FLAG_DEV_T4 0x2
511#define CXGBI_FLAG_ADAPTER_RESET 0x4
512#define CXGBI_FLAG_IPV4_SET 0x10
513struct cxgbi_device {
514 struct list_head list_head;
515 unsigned int flags;
516 struct net_device **ports;
517 void *lldev;
518 struct cxgbi_hba **hbas;
519 const unsigned short *mtus;
520 unsigned char nmtus;
521 unsigned char nports;
522 struct pci_dev *pdev;
523 struct dentry *debugfs_root;
524 struct iscsi_transport *itp;
525
526 unsigned int pfvf;
527 unsigned int snd_win;
528 unsigned int rcv_win;
529 unsigned int rx_credit_thres;
530 unsigned int skb_tx_rsvd;
531 unsigned int skb_rx_extra; /* for msg coalesced mode */
532 unsigned int tx_max_size;
533 unsigned int rx_max_size;
534 struct cxgbi_ports_map pmap;
535 struct cxgbi_tag_format tag_format;
536 struct cxgbi_ddp_info *ddp;
537
538 void (*dev_ddp_cleanup)(struct cxgbi_device *);
539 void (*csk_ddp_free_gl_skb)(struct cxgbi_ddp_info *, int, int);
540 int (*csk_ddp_alloc_gl_skb)(struct cxgbi_ddp_info *, int, int, gfp_t);
541 int (*csk_ddp_set)(struct cxgbi_sock *, struct cxgbi_pagepod_hdr *,
542 unsigned int, unsigned int,
543 struct cxgbi_gather_list *);
544 void (*csk_ddp_clear)(struct cxgbi_hba *,
545 unsigned int, unsigned int, unsigned int);
546 int (*csk_ddp_setup_digest)(struct cxgbi_sock *,
547 unsigned int, int, int, int);
548 int (*csk_ddp_setup_pgidx)(struct cxgbi_sock *,
549 unsigned int, int, bool);
550
551 void (*csk_release_offload_resources)(struct cxgbi_sock *);
552 int (*csk_rx_pdu_ready)(struct cxgbi_sock *, struct sk_buff *);
553 u32 (*csk_send_rx_credits)(struct cxgbi_sock *, u32);
554 int (*csk_push_tx_frames)(struct cxgbi_sock *, int);
555 void (*csk_send_abort_req)(struct cxgbi_sock *);
556 void (*csk_send_close_req)(struct cxgbi_sock *);
557 int (*csk_alloc_cpls)(struct cxgbi_sock *);
558 int (*csk_init_act_open)(struct cxgbi_sock *);
559
560 void *dd_data;
561};
562#define cxgbi_cdev_priv(cdev) ((cdev)->dd_data)
563
564struct cxgbi_conn {
565 struct cxgbi_endpoint *cep;
566 struct iscsi_conn *iconn;
567 struct cxgbi_hba *chba;
568 u32 task_idx_bits;
569};
570
571struct cxgbi_endpoint {
572 struct cxgbi_conn *cconn;
573 struct cxgbi_hba *chba;
574 struct cxgbi_sock *csk;
575};
576
577#define MAX_PDU_FRAGS ((ULP2_MAX_PDU_PAYLOAD + 512 - 1) / 512)
578struct cxgbi_task_data {
579 unsigned short nr_frags;
580 skb_frag_t frags[MAX_PDU_FRAGS];
581 struct sk_buff *skb;
582 unsigned int offset;
583 unsigned int count;
584 unsigned int sgoffset;
585};
586#define iscsi_task_cxgbi_data(task) \
587 ((task)->dd_data + sizeof(struct iscsi_tcp_task))
588
589static inline int cxgbi_is_ddp_tag(struct cxgbi_tag_format *tformat, u32 tag)
590{
591 return !(tag & (1 << (tformat->rsvd_bits + tformat->rsvd_shift - 1)));
592}
593
594static inline int cxgbi_sw_tag_usable(struct cxgbi_tag_format *tformat,
595 u32 sw_tag)
596{
597 sw_tag >>= (32 - tformat->rsvd_bits);
598 return !sw_tag;
599}
600
601static inline u32 cxgbi_set_non_ddp_tag(struct cxgbi_tag_format *tformat,
602 u32 sw_tag)
603{
604 unsigned char shift = tformat->rsvd_bits + tformat->rsvd_shift - 1;
605 u32 mask = (1 << shift) - 1;
606
607 if (sw_tag && (sw_tag & ~mask)) {
608 u32 v1 = sw_tag & ((1 << shift) - 1);
609 u32 v2 = (sw_tag >> (shift - 1)) << shift;
610
611 return v2 | v1 | 1 << shift;
612 }
613
614 return sw_tag | 1 << shift;
615}
616
617static inline u32 cxgbi_ddp_tag_base(struct cxgbi_tag_format *tformat,
618 u32 sw_tag)
619{
620 u32 mask = (1 << tformat->rsvd_shift) - 1;
621
622 if (sw_tag && (sw_tag & ~mask)) {
623 u32 v1 = sw_tag & mask;
624 u32 v2 = sw_tag >> tformat->rsvd_shift;
625
626 v2 <<= tformat->rsvd_bits + tformat->rsvd_shift;
627
628 return v2 | v1;
629 }
630
631 return sw_tag;
632}
633
634static inline u32 cxgbi_tag_rsvd_bits(struct cxgbi_tag_format *tformat,
635 u32 tag)
636{
637 if (cxgbi_is_ddp_tag(tformat, tag))
638 return (tag >> tformat->rsvd_shift) & tformat->rsvd_mask;
639
640 return 0;
641}
642
643static inline u32 cxgbi_tag_nonrsvd_bits(struct cxgbi_tag_format *tformat,
644 u32 tag)
645{
646 unsigned char shift = tformat->rsvd_bits + tformat->rsvd_shift - 1;
647 u32 v1, v2;
648
649 if (cxgbi_is_ddp_tag(tformat, tag)) {
650 v1 = tag & ((1 << tformat->rsvd_shift) - 1);
651 v2 = (tag >> (shift + 1)) << tformat->rsvd_shift;
652 } else {
653 u32 mask = (1 << shift) - 1;
654 tag &= ~(1 << shift);
655 v1 = tag & mask;
656 v2 = (tag >> 1) & ~mask;
657 }
658 return v1 | v2;
659}
660
661static inline void *cxgbi_alloc_big_mem(unsigned int size,
662 gfp_t gfp)
663{
664 void *p = kmalloc(size, gfp);
665 if (!p)
666 p = vmalloc(size);
667 if (p)
668 memset(p, 0, size);
669 return p;
670}
671
672static inline void cxgbi_free_big_mem(void *addr)
673{
674 if (is_vmalloc_addr(addr))
675 vfree(addr);
676 else
677 kfree(addr);
678}
679
680static inline void cxgbi_set_iscsi_ipv4(struct cxgbi_hba *chba, __be32 ipaddr)
681{
682 if (chba->cdev->flags & CXGBI_FLAG_IPV4_SET)
683 chba->ipv4addr = ipaddr;
684 else
685 pr_info("set iscsi ipv4 NOT supported, using %s ipv4.\n",
686 chba->ndev->name);
687}
688
689static inline __be32 cxgbi_get_iscsi_ipv4(struct cxgbi_hba *chba)
690{
691 return chba->ipv4addr;
692}
693
694struct cxgbi_device *cxgbi_device_register(unsigned int, unsigned int);
695void cxgbi_device_unregister(struct cxgbi_device *);
696void cxgbi_device_unregister_all(unsigned int flag);
697struct cxgbi_device *cxgbi_device_find_by_lldev(void *);
698int cxgbi_hbas_add(struct cxgbi_device *, unsigned int, unsigned int,
699 struct scsi_host_template *,
700 struct scsi_transport_template *);
701void cxgbi_hbas_remove(struct cxgbi_device *);
702
703int cxgbi_device_portmap_create(struct cxgbi_device *cdev, unsigned int base,
704 unsigned int max_conn);
705void cxgbi_device_portmap_cleanup(struct cxgbi_device *cdev);
706
707void cxgbi_conn_tx_open(struct cxgbi_sock *);
708void cxgbi_conn_pdu_ready(struct cxgbi_sock *);
709int cxgbi_conn_alloc_pdu(struct iscsi_task *, u8);
710int cxgbi_conn_init_pdu(struct iscsi_task *, unsigned int , unsigned int);
711int cxgbi_conn_xmit_pdu(struct iscsi_task *);
712
713void cxgbi_cleanup_task(struct iscsi_task *task);
714
715void cxgbi_get_conn_stats(struct iscsi_cls_conn *, struct iscsi_stats *);
716int cxgbi_set_conn_param(struct iscsi_cls_conn *,
717 enum iscsi_param, char *, int);
718int cxgbi_get_conn_param(struct iscsi_cls_conn *, enum iscsi_param, char *);
719struct iscsi_cls_conn *cxgbi_create_conn(struct iscsi_cls_session *, u32);
720int cxgbi_bind_conn(struct iscsi_cls_session *,
721 struct iscsi_cls_conn *, u64, int);
722void cxgbi_destroy_session(struct iscsi_cls_session *);
723struct iscsi_cls_session *cxgbi_create_session(struct iscsi_endpoint *,
724 u16, u16, u32);
725int cxgbi_set_host_param(struct Scsi_Host *,
726 enum iscsi_host_param, char *, int);
727int cxgbi_get_host_param(struct Scsi_Host *, enum iscsi_host_param, char *);
728struct iscsi_endpoint *cxgbi_ep_connect(struct Scsi_Host *,
729 struct sockaddr *, int);
730int cxgbi_ep_poll(struct iscsi_endpoint *, int);
731void cxgbi_ep_disconnect(struct iscsi_endpoint *);
732
733int cxgbi_iscsi_init(struct iscsi_transport *,
734 struct scsi_transport_template **);
735void cxgbi_iscsi_cleanup(struct iscsi_transport *,
736 struct scsi_transport_template **);
737void cxgbi_parse_pdu_itt(struct iscsi_conn *, itt_t, int *, int *);
738int cxgbi_ddp_init(struct cxgbi_device *, unsigned int, unsigned int,
739 unsigned int, unsigned int);
740int cxgbi_ddp_cleanup(struct cxgbi_device *);
741void cxgbi_ddp_page_size_factor(int *);
742void cxgbi_ddp_ppod_clear(struct cxgbi_pagepod *);
743void cxgbi_ddp_ppod_set(struct cxgbi_pagepod *, struct cxgbi_pagepod_hdr *,
744 struct cxgbi_gather_list *, unsigned int);
745#endif /*__LIBCXGBI_H__*/
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-14 07:46:21 -0500