1 /*
2  * Copyright (c) 2009-2010 Chelsio, Inc. All rights reserved.
3  *
4  * This software is available to you under a choice of one of two
5  * licenses.  You may choose to be licensed under the terms of the GNU
6  * General Public License (GPL) Version 2, available from the file
7  * COPYING in the main directory of this source tree, or the
8  * OpenIB.org BSD license below:
9  *
10  *     Redistribution and use in source and binary forms, with or
11  *     without modification, are permitted provided that the following
12  *     conditions are met:
13  *
14  *      - Redistributions of source code must retain the above
15  *	  copyright notice, this list of conditions and the following
16  *	  disclaimer.
17  *      - Redistributions in binary form must reproduce the above
18  *	  copyright notice, this list of conditions and the following
19  *	  disclaimer in the documentation and/or other materials
20  *	  provided with the distribution.
21  *
22  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
23  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
24  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
25  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
26  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
27  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
28  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
29  * SOFTWARE.
30  */
31 #ifndef __IW_CXGB4_H__
32 #define __IW_CXGB4_H__
33 
34 #include <linux/mutex.h>
35 #include <linux/list.h>
36 #include <linux/spinlock.h>
37 #include <linux/xarray.h>
38 #include <linux/completion.h>
39 #include <linux/netdevice.h>
40 #include <linux/sched/mm.h>
41 #include <linux/pci.h>
42 #include <linux/dma-mapping.h>
43 #include <linux/inet.h>
44 #include <linux/wait.h>
45 #include <linux/kref.h>
46 #include <linux/timer.h>
47 #include <linux/io.h>
48 #include <linux/workqueue.h>
49 
50 #include <asm/byteorder.h>
51 
52 #include <net/net_namespace.h>
53 
54 #include <rdma/ib_verbs.h>
55 #include <rdma/iw_cm.h>
56 #include <rdma/rdma_netlink.h>
57 #include <rdma/iw_portmap.h>
58 #include <rdma/restrack.h>
59 
60 #include "cxgb4.h"
61 #include "cxgb4_uld.h"
62 #include "l2t.h"
63 #include <rdma/cxgb4-abi.h>
64 
65 #define DRV_NAME "iw_cxgb4"
66 #define MOD DRV_NAME ":"
67 
68 #ifdef pr_fmt
69 #undef pr_fmt
70 #endif
71 
72 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
73 
74 #include "t4.h"
75 
76 #define PBL_OFF(rdev_p, a) ((a) - (rdev_p)->lldi.vr->pbl.start)
77 #define RQT_OFF(rdev_p, a) ((a) - (rdev_p)->lldi.vr->rq.start)
78 
79 static inline void *cplhdr(struct sk_buff *skb)
80 {
81 	return skb->data;
82 }
83 
84 #define C4IW_ID_TABLE_F_RANDOM 1       /* Pseudo-randomize the id's returned */
85 #define C4IW_ID_TABLE_F_EMPTY  2       /* Table is initially empty */
86 
87 struct c4iw_id_table {
88 	u32 flags;
89 	u32 start;              /* logical minimal id */
90 	u32 last;               /* hint for find */
91 	u32 max;
92 	spinlock_t lock;
93 	unsigned long *table;
94 };
95 
96 struct c4iw_resource {
97 	struct c4iw_id_table tpt_table;
98 	struct c4iw_id_table qid_table;
99 	struct c4iw_id_table pdid_table;
100 	struct c4iw_id_table srq_table;
101 };
102 
103 struct c4iw_qid_list {
104 	struct list_head entry;
105 	u32 qid;
106 };
107 
108 struct c4iw_dev_ucontext {
109 	struct list_head qpids;
110 	struct list_head cqids;
111 	struct mutex lock;
112 	struct kref kref;
113 };
114 
115 enum c4iw_rdev_flags {
116 	T4_FATAL_ERROR = (1<<0),
117 	T4_STATUS_PAGE_DISABLED = (1<<1),
118 };
119 
120 struct c4iw_stat {
121 	u64 total;
122 	u64 cur;
123 	u64 max;
124 	u64 fail;
125 };
126 
127 struct c4iw_stats {
128 	struct mutex lock;
129 	struct c4iw_stat qid;
130 	struct c4iw_stat pd;
131 	struct c4iw_stat stag;
132 	struct c4iw_stat pbl;
133 	struct c4iw_stat rqt;
134 	struct c4iw_stat srqt;
135 	struct c4iw_stat srq;
136 	struct c4iw_stat ocqp;
137 	u64  db_full;
138 	u64  db_empty;
139 	u64  db_drop;
140 	u64  db_state_transitions;
141 	u64  db_fc_interruptions;
142 	u64  tcam_full;
143 	u64  act_ofld_conn_fails;
144 	u64  pas_ofld_conn_fails;
145 	u64  neg_adv;
146 };
147 
148 struct c4iw_hw_queue {
149 	int t4_eq_status_entries;
150 	int t4_max_eq_size;
151 	int t4_max_iq_size;
152 	int t4_max_rq_size;
153 	int t4_max_sq_size;
154 	int t4_max_qp_depth;
155 	int t4_max_cq_depth;
156 	int t4_stat_len;
157 };
158 
159 struct wr_log_entry {
160 	ktime_t post_host_time;
161 	ktime_t poll_host_time;
162 	u64 post_sge_ts;
163 	u64 cqe_sge_ts;
164 	u64 poll_sge_ts;
165 	u16 qid;
166 	u16 wr_id;
167 	u8 opcode;
168 	u8 valid;
169 };
170 
171 struct c4iw_rdev {
172 	struct c4iw_resource resource;
173 	u32 qpmask;
174 	u32 cqmask;
175 	struct c4iw_dev_ucontext uctx;
176 	struct gen_pool *pbl_pool;
177 	struct gen_pool *rqt_pool;
178 	struct gen_pool *ocqp_pool;
179 	u32 flags;
180 	struct cxgb4_lld_info lldi;
181 	unsigned long bar2_pa;
182 	void __iomem *bar2_kva;
183 	unsigned long oc_mw_pa;
184 	void __iomem *oc_mw_kva;
185 	struct c4iw_stats stats;
186 	struct c4iw_hw_queue hw_queue;
187 	struct t4_dev_status_page *status_page;
188 	atomic_t wr_log_idx;
189 	struct wr_log_entry *wr_log;
190 	int wr_log_size;
191 	struct workqueue_struct *free_workq;
192 	struct completion rqt_compl;
193 	struct completion pbl_compl;
194 	struct kref rqt_kref;
195 	struct kref pbl_kref;
196 };
197 
198 static inline int c4iw_fatal_error(struct c4iw_rdev *rdev)
199 {
200 	return rdev->flags & T4_FATAL_ERROR;
201 }
202 
203 static inline int c4iw_num_stags(struct c4iw_rdev *rdev)
204 {
205 	return (int)(rdev->lldi.vr->stag.size >> 5);
206 }
207 
208 #define C4IW_WR_TO (60*HZ)
209 
210 struct c4iw_wr_wait {
211 	struct completion completion;
212 	int ret;
213 	struct kref kref;
214 };
215 
216 void _c4iw_free_wr_wait(struct kref *kref);
217 
218 static inline void c4iw_put_wr_wait(struct c4iw_wr_wait *wr_waitp)
219 {
220 	pr_debug("wr_wait %p ref before put %u\n", wr_waitp,
221 		 kref_read(&wr_waitp->kref));
222 	WARN_ON(kref_read(&wr_waitp->kref) == 0);
223 	kref_put(&wr_waitp->kref, _c4iw_free_wr_wait);
224 }
225 
226 static inline void c4iw_get_wr_wait(struct c4iw_wr_wait *wr_waitp)
227 {
228 	pr_debug("wr_wait %p ref before get %u\n", wr_waitp,
229 		 kref_read(&wr_waitp->kref));
230 	WARN_ON(kref_read(&wr_waitp->kref) == 0);
231 	kref_get(&wr_waitp->kref);
232 }
233 
234 static inline void c4iw_init_wr_wait(struct c4iw_wr_wait *wr_waitp)
235 {
236 	wr_waitp->ret = 0;
237 	init_completion(&wr_waitp->completion);
238 }
239 
240 static inline void _c4iw_wake_up(struct c4iw_wr_wait *wr_waitp, int ret,
241 				 bool deref)
242 {
243 	wr_waitp->ret = ret;
244 	complete(&wr_waitp->completion);
245 	if (deref)
246 		c4iw_put_wr_wait(wr_waitp);
247 }
248 
249 static inline void c4iw_wake_up_noref(struct c4iw_wr_wait *wr_waitp, int ret)
250 {
251 	_c4iw_wake_up(wr_waitp, ret, false);
252 }
253 
254 static inline void c4iw_wake_up_deref(struct c4iw_wr_wait *wr_waitp, int ret)
255 {
256 	_c4iw_wake_up(wr_waitp, ret, true);
257 }
258 
259 static inline int c4iw_wait_for_reply(struct c4iw_rdev *rdev,
260 				 struct c4iw_wr_wait *wr_waitp,
261 				 u32 hwtid, u32 qpid,
262 				 const char *func)
263 {
264 	int ret;
265 
266 	if (c4iw_fatal_error(rdev)) {
267 		wr_waitp->ret = -EIO;
268 		goto out;
269 	}
270 
271 	ret = wait_for_completion_timeout(&wr_waitp->completion, C4IW_WR_TO);
272 	if (!ret) {
273 		pr_err("%s - Device %s not responding (disabling device) - tid %u qpid %u\n",
274 		       func, pci_name(rdev->lldi.pdev), hwtid, qpid);
275 		rdev->flags |= T4_FATAL_ERROR;
276 		wr_waitp->ret = -EIO;
277 		goto out;
278 	}
279 	if (wr_waitp->ret)
280 		pr_debug("%s: FW reply %d tid %u qpid %u\n",
281 			 pci_name(rdev->lldi.pdev), wr_waitp->ret, hwtid, qpid);
282 out:
283 	return wr_waitp->ret;
284 }
285 
286 int c4iw_ofld_send(struct c4iw_rdev *rdev, struct sk_buff *skb);
287 
288 static inline int c4iw_ref_send_wait(struct c4iw_rdev *rdev,
289 				     struct sk_buff *skb,
290 				     struct c4iw_wr_wait *wr_waitp,
291 				     u32 hwtid, u32 qpid,
292 				     const char *func)
293 {
294 	int ret;
295 
296 	pr_debug("%s wr_wait %p hwtid %u qpid %u\n", func, wr_waitp, hwtid,
297 		 qpid);
298 	c4iw_get_wr_wait(wr_waitp);
299 	ret = c4iw_ofld_send(rdev, skb);
300 	if (ret) {
301 		c4iw_put_wr_wait(wr_waitp);
302 		return ret;
303 	}
304 	return c4iw_wait_for_reply(rdev, wr_waitp, hwtid, qpid, func);
305 }
306 
307 enum db_state {
308 	NORMAL = 0,
309 	FLOW_CONTROL = 1,
310 	RECOVERY = 2,
311 	STOPPED = 3
312 };
313 
314 struct c4iw_dev {
315 	struct ib_device ibdev;
316 	struct c4iw_rdev rdev;
317 	u32 device_cap_flags;
318 	struct xarray cqs;
319 	struct xarray qps;
320 	struct xarray mrs;
321 	struct mutex db_mutex;
322 	struct dentry *debugfs_root;
323 	enum db_state db_state;
324 	struct xarray hwtids;
325 	struct xarray atids;
326 	struct xarray stids;
327 	struct list_head db_fc_list;
328 	u32 avail_ird;
329 	wait_queue_head_t wait;
330 };
331 
332 struct uld_ctx {
333 	struct list_head entry;
334 	struct cxgb4_lld_info lldi;
335 	struct c4iw_dev *dev;
336 	struct work_struct reg_work;
337 };
338 
339 static inline struct c4iw_dev *to_c4iw_dev(struct ib_device *ibdev)
340 {
341 	return container_of(ibdev, struct c4iw_dev, ibdev);
342 }
343 
344 static inline struct c4iw_cq *get_chp(struct c4iw_dev *rhp, u32 cqid)
345 {
346 	return xa_load(&rhp->cqs, cqid);
347 }
348 
349 static inline struct c4iw_qp *get_qhp(struct c4iw_dev *rhp, u32 qpid)
350 {
351 	return xa_load(&rhp->qps, qpid);
352 }
353 
354 extern uint c4iw_max_read_depth;
355 
356 static inline int cur_max_read_depth(struct c4iw_dev *dev)
357 {
358 	return min(dev->rdev.lldi.max_ordird_qp, c4iw_max_read_depth);
359 }
360 
361 struct c4iw_pd {
362 	struct ib_pd ibpd;
363 	u32 pdid;
364 	struct c4iw_dev *rhp;
365 };
366 
367 static inline struct c4iw_pd *to_c4iw_pd(struct ib_pd *ibpd)
368 {
369 	return container_of(ibpd, struct c4iw_pd, ibpd);
370 }
371 
372 struct tpt_attributes {
373 	u64 len;
374 	u64 va_fbo;
375 	enum fw_ri_mem_perms perms;
376 	u32 stag;
377 	u32 pdid;
378 	u32 qpid;
379 	u32 pbl_addr;
380 	u32 pbl_size;
381 	u32 state:1;
382 	u32 type:2;
383 	u32 rsvd:1;
384 	u32 remote_invaliate_disable:1;
385 	u32 zbva:1;
386 	u32 mw_bind_enable:1;
387 	u32 page_size:5;
388 };
389 
390 struct c4iw_mr {
391 	struct ib_mr ibmr;
392 	struct ib_umem *umem;
393 	struct c4iw_dev *rhp;
394 	struct sk_buff *dereg_skb;
395 	u64 kva;
396 	struct tpt_attributes attr;
397 	u64 *mpl;
398 	dma_addr_t mpl_addr;
399 	u32 max_mpl_len;
400 	u32 mpl_len;
401 	struct c4iw_wr_wait *wr_waitp;
402 };
403 
404 static inline struct c4iw_mr *to_c4iw_mr(struct ib_mr *ibmr)
405 {
406 	return container_of(ibmr, struct c4iw_mr, ibmr);
407 }
408 
409 struct c4iw_mw {
410 	struct ib_mw ibmw;
411 	struct c4iw_dev *rhp;
412 	struct sk_buff *dereg_skb;
413 	u64 kva;
414 	struct tpt_attributes attr;
415 	struct c4iw_wr_wait *wr_waitp;
416 };
417 
418 static inline struct c4iw_mw *to_c4iw_mw(struct ib_mw *ibmw)
419 {
420 	return container_of(ibmw, struct c4iw_mw, ibmw);
421 }
422 
423 struct c4iw_cq {
424 	struct ib_cq ibcq;
425 	struct c4iw_dev *rhp;
426 	struct sk_buff *destroy_skb;
427 	struct t4_cq cq;
428 	spinlock_t lock;
429 	spinlock_t comp_handler_lock;
430 	refcount_t refcnt;
431 	struct completion cq_rel_comp;
432 	struct c4iw_wr_wait *wr_waitp;
433 };
434 
435 static inline struct c4iw_cq *to_c4iw_cq(struct ib_cq *ibcq)
436 {
437 	return container_of(ibcq, struct c4iw_cq, ibcq);
438 }
439 
440 struct c4iw_mpa_attributes {
441 	u8 initiator;
442 	u8 recv_marker_enabled;
443 	u8 xmit_marker_enabled;
444 	u8 crc_enabled;
445 	u8 enhanced_rdma_conn;
446 	u8 version;
447 	u8 p2p_type;
448 };
449 
450 struct c4iw_qp_attributes {
451 	u32 scq;
452 	u32 rcq;
453 	u32 sq_num_entries;
454 	u32 rq_num_entries;
455 	u32 sq_max_sges;
456 	u32 sq_max_sges_rdma_write;
457 	u32 rq_max_sges;
458 	u32 state;
459 	u8 enable_rdma_read;
460 	u8 enable_rdma_write;
461 	u8 enable_bind;
462 	u8 enable_mmid0_fastreg;
463 	u32 max_ord;
464 	u32 max_ird;
465 	u32 pd;
466 	u32 next_state;
467 	char terminate_buffer[52];
468 	u32 terminate_msg_len;
469 	u8 is_terminate_local;
470 	struct c4iw_mpa_attributes mpa_attr;
471 	struct c4iw_ep *llp_stream_handle;
472 	u8 layer_etype;
473 	u8 ecode;
474 	u16 sq_db_inc;
475 	u16 rq_db_inc;
476 	u8 send_term;
477 };
478 
479 struct c4iw_qp {
480 	struct ib_qp ibqp;
481 	struct list_head db_fc_entry;
482 	struct c4iw_dev *rhp;
483 	struct c4iw_ep *ep;
484 	struct c4iw_qp_attributes attr;
485 	struct t4_wq wq;
486 	spinlock_t lock;
487 	struct mutex mutex;
488 	wait_queue_head_t wait;
489 	int sq_sig_all;
490 	struct c4iw_srq *srq;
491 	struct c4iw_ucontext *ucontext;
492 	struct c4iw_wr_wait *wr_waitp;
493 	struct completion qp_rel_comp;
494 	refcount_t qp_refcnt;
495 };
496 
497 static inline struct c4iw_qp *to_c4iw_qp(struct ib_qp *ibqp)
498 {
499 	return container_of(ibqp, struct c4iw_qp, ibqp);
500 }
501 
502 struct c4iw_srq {
503 	struct ib_srq ibsrq;
504 	struct list_head db_fc_entry;
505 	struct c4iw_dev *rhp;
506 	struct t4_srq wq;
507 	struct sk_buff *destroy_skb;
508 	u32 srq_limit;
509 	u32 pdid;
510 	int idx;
511 	u32 flags;
512 	spinlock_t lock; /* protects srq */
513 	struct c4iw_wr_wait *wr_waitp;
514 	bool armed;
515 };
516 
517 static inline struct c4iw_srq *to_c4iw_srq(struct ib_srq *ibsrq)
518 {
519 	return container_of(ibsrq, struct c4iw_srq, ibsrq);
520 }
521 
522 struct c4iw_ucontext {
523 	struct ib_ucontext ibucontext;
524 	struct c4iw_dev_ucontext uctx;
525 	u32 key;
526 	spinlock_t mmap_lock;
527 	struct list_head mmaps;
528 	bool is_32b_cqe;
529 };
530 
531 static inline struct c4iw_ucontext *to_c4iw_ucontext(struct ib_ucontext *c)
532 {
533 	return container_of(c, struct c4iw_ucontext, ibucontext);
534 }
535 
536 struct c4iw_mm_entry {
537 	struct list_head entry;
538 	u64 addr;
539 	u32 key;
540 	unsigned len;
541 };
542 
543 static inline struct c4iw_mm_entry *remove_mmap(struct c4iw_ucontext *ucontext,
544 						u32 key, unsigned len)
545 {
546 	struct list_head *pos, *nxt;
547 	struct c4iw_mm_entry *mm;
548 
549 	spin_lock(&ucontext->mmap_lock);
550 	list_for_each_safe(pos, nxt, &ucontext->mmaps) {
551 
552 		mm = list_entry(pos, struct c4iw_mm_entry, entry);
553 		if (mm->key == key && mm->len == len) {
554 			list_del_init(&mm->entry);
555 			spin_unlock(&ucontext->mmap_lock);
556 			pr_debug("key 0x%x addr 0x%llx len %d\n", key,
557 				 (unsigned long long)mm->addr, mm->len);
558 			return mm;
559 		}
560 	}
561 	spin_unlock(&ucontext->mmap_lock);
562 	return NULL;
563 }
564 
565 static inline void insert_mmap(struct c4iw_ucontext *ucontext,
566 			       struct c4iw_mm_entry *mm)
567 {
568 	spin_lock(&ucontext->mmap_lock);
569 	pr_debug("key 0x%x addr 0x%llx len %d\n",
570 		 mm->key, (unsigned long long)mm->addr, mm->len);
571 	list_add_tail(&mm->entry, &ucontext->mmaps);
572 	spin_unlock(&ucontext->mmap_lock);
573 }
574 
575 enum c4iw_qp_attr_mask {
576 	C4IW_QP_ATTR_NEXT_STATE = 1 << 0,
577 	C4IW_QP_ATTR_SQ_DB = 1<<1,
578 	C4IW_QP_ATTR_RQ_DB = 1<<2,
579 	C4IW_QP_ATTR_ENABLE_RDMA_READ = 1 << 7,
580 	C4IW_QP_ATTR_ENABLE_RDMA_WRITE = 1 << 8,
581 	C4IW_QP_ATTR_ENABLE_RDMA_BIND = 1 << 9,
582 	C4IW_QP_ATTR_MAX_ORD = 1 << 11,
583 	C4IW_QP_ATTR_MAX_IRD = 1 << 12,
584 	C4IW_QP_ATTR_LLP_STREAM_HANDLE = 1 << 22,
585 	C4IW_QP_ATTR_STREAM_MSG_BUFFER = 1 << 23,
586 	C4IW_QP_ATTR_MPA_ATTR = 1 << 24,
587 	C4IW_QP_ATTR_QP_CONTEXT_ACTIVATE = 1 << 25,
588 	C4IW_QP_ATTR_VALID_MODIFY = (C4IW_QP_ATTR_ENABLE_RDMA_READ |
589 				     C4IW_QP_ATTR_ENABLE_RDMA_WRITE |
590 				     C4IW_QP_ATTR_MAX_ORD |
591 				     C4IW_QP_ATTR_MAX_IRD |
592 				     C4IW_QP_ATTR_LLP_STREAM_HANDLE |
593 				     C4IW_QP_ATTR_STREAM_MSG_BUFFER |
594 				     C4IW_QP_ATTR_MPA_ATTR |
595 				     C4IW_QP_ATTR_QP_CONTEXT_ACTIVATE)
596 };
597 
598 int c4iw_modify_qp(struct c4iw_dev *rhp,
599 				struct c4iw_qp *qhp,
600 				enum c4iw_qp_attr_mask mask,
601 				struct c4iw_qp_attributes *attrs,
602 				int internal);
603 
604 enum c4iw_qp_state {
605 	C4IW_QP_STATE_IDLE,
606 	C4IW_QP_STATE_RTS,
607 	C4IW_QP_STATE_ERROR,
608 	C4IW_QP_STATE_TERMINATE,
609 	C4IW_QP_STATE_CLOSING,
610 	C4IW_QP_STATE_TOT
611 };
612 
613 static inline int c4iw_convert_state(enum ib_qp_state ib_state)
614 {
615 	switch (ib_state) {
616 	case IB_QPS_RESET:
617 	case IB_QPS_INIT:
618 		return C4IW_QP_STATE_IDLE;
619 	case IB_QPS_RTS:
620 		return C4IW_QP_STATE_RTS;
621 	case IB_QPS_SQD:
622 		return C4IW_QP_STATE_CLOSING;
623 	case IB_QPS_SQE:
624 		return C4IW_QP_STATE_TERMINATE;
625 	case IB_QPS_ERR:
626 		return C4IW_QP_STATE_ERROR;
627 	default:
628 		return -1;
629 	}
630 }
631 
632 static inline int to_ib_qp_state(int c4iw_qp_state)
633 {
634 	switch (c4iw_qp_state) {
635 	case C4IW_QP_STATE_IDLE:
636 		return IB_QPS_INIT;
637 	case C4IW_QP_STATE_RTS:
638 		return IB_QPS_RTS;
639 	case C4IW_QP_STATE_CLOSING:
640 		return IB_QPS_SQD;
641 	case C4IW_QP_STATE_TERMINATE:
642 		return IB_QPS_SQE;
643 	case C4IW_QP_STATE_ERROR:
644 		return IB_QPS_ERR;
645 	}
646 	return IB_QPS_ERR;
647 }
648 
649 static inline u32 c4iw_ib_to_tpt_access(int a)
650 {
651 	return (a & IB_ACCESS_REMOTE_WRITE ? FW_RI_MEM_ACCESS_REM_WRITE : 0) |
652 	       (a & IB_ACCESS_REMOTE_READ ? FW_RI_MEM_ACCESS_REM_READ : 0) |
653 	       (a & IB_ACCESS_LOCAL_WRITE ? FW_RI_MEM_ACCESS_LOCAL_WRITE : 0) |
654 	       FW_RI_MEM_ACCESS_LOCAL_READ;
655 }
656 
657 enum c4iw_mmid_state {
658 	C4IW_STAG_STATE_VALID,
659 	C4IW_STAG_STATE_INVALID
660 };
661 
662 #define C4IW_NODE_DESC "cxgb4 Chelsio Communications"
663 
664 #define MPA_KEY_REQ "MPA ID Req Frame"
665 #define MPA_KEY_REP "MPA ID Rep Frame"
666 
667 #define MPA_MAX_PRIVATE_DATA	256
668 #define MPA_ENHANCED_RDMA_CONN	0x10
669 #define MPA_REJECT		0x20
670 #define MPA_CRC			0x40
671 #define MPA_MARKERS		0x80
672 #define MPA_FLAGS_MASK		0xE0
673 
674 #define MPA_V2_PEER2PEER_MODEL          0x8000
675 #define MPA_V2_ZERO_LEN_FPDU_RTR        0x4000
676 #define MPA_V2_RDMA_WRITE_RTR           0x8000
677 #define MPA_V2_RDMA_READ_RTR            0x4000
678 #define MPA_V2_IRD_ORD_MASK             0x3FFF
679 
680 #define c4iw_put_ep(ep) {						\
681 	pr_debug("put_ep ep %p refcnt %d\n",		\
682 		 ep, kref_read(&((ep)->kref)));				\
683 	WARN_ON(kref_read(&((ep)->kref)) < 1);				\
684 	kref_put(&((ep)->kref), _c4iw_free_ep);				\
685 }
686 
687 #define c4iw_get_ep(ep) {						\
688 	pr_debug("get_ep ep %p, refcnt %d\n",		\
689 		 ep, kref_read(&((ep)->kref)));				\
690 	kref_get(&((ep)->kref));					\
691 }
692 void _c4iw_free_ep(struct kref *kref);
693 
694 struct mpa_message {
695 	u8 key[16];
696 	u8 flags;
697 	u8 revision;
698 	__be16 private_data_size;
699 	u8 private_data[];
700 };
701 
702 struct mpa_v2_conn_params {
703 	__be16 ird;
704 	__be16 ord;
705 };
706 
707 struct terminate_message {
708 	u8 layer_etype;
709 	u8 ecode;
710 	__be16 hdrct_rsvd;
711 	u8 len_hdrs[];
712 };
713 
714 #define TERM_MAX_LENGTH (sizeof(struct terminate_message) + 2 + 18 + 28)
715 
716 enum c4iw_layers_types {
717 	LAYER_RDMAP		= 0x00,
718 	LAYER_DDP		= 0x10,
719 	LAYER_MPA		= 0x20,
720 	RDMAP_LOCAL_CATA	= 0x00,
721 	RDMAP_REMOTE_PROT	= 0x01,
722 	RDMAP_REMOTE_OP		= 0x02,
723 	DDP_LOCAL_CATA		= 0x00,
724 	DDP_TAGGED_ERR		= 0x01,
725 	DDP_UNTAGGED_ERR	= 0x02,
726 	DDP_LLP			= 0x03
727 };
728 
729 enum c4iw_rdma_ecodes {
730 	RDMAP_INV_STAG		= 0x00,
731 	RDMAP_BASE_BOUNDS	= 0x01,
732 	RDMAP_ACC_VIOL		= 0x02,
733 	RDMAP_STAG_NOT_ASSOC	= 0x03,
734 	RDMAP_TO_WRAP		= 0x04,
735 	RDMAP_INV_VERS		= 0x05,
736 	RDMAP_INV_OPCODE	= 0x06,
737 	RDMAP_STREAM_CATA	= 0x07,
738 	RDMAP_GLOBAL_CATA	= 0x08,
739 	RDMAP_CANT_INV_STAG	= 0x09,
740 	RDMAP_UNSPECIFIED	= 0xff
741 };
742 
743 enum c4iw_ddp_ecodes {
744 	DDPT_INV_STAG		= 0x00,
745 	DDPT_BASE_BOUNDS	= 0x01,
746 	DDPT_STAG_NOT_ASSOC	= 0x02,
747 	DDPT_TO_WRAP		= 0x03,
748 	DDPT_INV_VERS		= 0x04,
749 	DDPU_INV_QN		= 0x01,
750 	DDPU_INV_MSN_NOBUF	= 0x02,
751 	DDPU_INV_MSN_RANGE	= 0x03,
752 	DDPU_INV_MO		= 0x04,
753 	DDPU_MSG_TOOBIG		= 0x05,
754 	DDPU_INV_VERS		= 0x06
755 };
756 
757 enum c4iw_mpa_ecodes {
758 	MPA_CRC_ERR		= 0x02,
759 	MPA_MARKER_ERR          = 0x03,
760 	MPA_LOCAL_CATA          = 0x05,
761 	MPA_INSUFF_IRD          = 0x06,
762 	MPA_NOMATCH_RTR         = 0x07,
763 };
764 
765 enum c4iw_ep_state {
766 	IDLE = 0,
767 	LISTEN,
768 	CONNECTING,
769 	MPA_REQ_WAIT,
770 	MPA_REQ_SENT,
771 	MPA_REQ_RCVD,
772 	MPA_REP_SENT,
773 	FPDU_MODE,
774 	ABORTING,
775 	CLOSING,
776 	MORIBUND,
777 	DEAD,
778 };
779 
780 enum c4iw_ep_flags {
781 	PEER_ABORT_IN_PROGRESS	= 0,
782 	ABORT_REQ_IN_PROGRESS	= 1,
783 	RELEASE_RESOURCES	= 2,
784 	CLOSE_SENT		= 3,
785 	TIMEOUT                 = 4,
786 	QP_REFERENCED           = 5,
787 	STOP_MPA_TIMER		= 7,
788 };
789 
790 enum c4iw_ep_history {
791 	ACT_OPEN_REQ            = 0,
792 	ACT_OFLD_CONN           = 1,
793 	ACT_OPEN_RPL            = 2,
794 	ACT_ESTAB               = 3,
795 	PASS_ACCEPT_REQ         = 4,
796 	PASS_ESTAB              = 5,
797 	ABORT_UPCALL            = 6,
798 	ESTAB_UPCALL            = 7,
799 	CLOSE_UPCALL            = 8,
800 	ULP_ACCEPT              = 9,
801 	ULP_REJECT              = 10,
802 	TIMEDOUT                = 11,
803 	PEER_ABORT              = 12,
804 	PEER_CLOSE              = 13,
805 	CONNREQ_UPCALL          = 14,
806 	ABORT_CONN              = 15,
807 	DISCONN_UPCALL          = 16,
808 	EP_DISC_CLOSE           = 17,
809 	EP_DISC_ABORT           = 18,
810 	CONN_RPL_UPCALL         = 19,
811 	ACT_RETRY_NOMEM         = 20,
812 	ACT_RETRY_INUSE         = 21,
813 	CLOSE_CON_RPL		= 22,
814 	EP_DISC_FAIL		= 24,
815 	QP_REFED		= 25,
816 	QP_DEREFED		= 26,
817 	CM_ID_REFED		= 27,
818 	CM_ID_DEREFED		= 28,
819 };
820 
821 enum conn_pre_alloc_buffers {
822 	CN_ABORT_REQ_BUF,
823 	CN_ABORT_RPL_BUF,
824 	CN_CLOSE_CON_REQ_BUF,
825 	CN_DESTROY_BUF,
826 	CN_FLOWC_BUF,
827 	CN_MAX_CON_BUF
828 };
829 
830 enum {
831 	FLOWC_LEN = offsetof(struct fw_flowc_wr, mnemval[FW_FLOWC_MNEM_MAX])
832 };
833 
834 union cpl_wr_size {
835 	struct cpl_abort_req abrt_req;
836 	struct cpl_abort_rpl abrt_rpl;
837 	struct fw_ri_wr ri_req;
838 	struct cpl_close_con_req close_req;
839 	char flowc_buf[FLOWC_LEN];
840 };
841 
842 struct c4iw_ep_common {
843 	struct iw_cm_id *cm_id;
844 	struct c4iw_qp *qp;
845 	struct c4iw_dev *dev;
846 	struct sk_buff_head ep_skb_list;
847 	enum c4iw_ep_state state;
848 	struct kref kref;
849 	struct mutex mutex;
850 	struct sockaddr_storage local_addr;
851 	struct sockaddr_storage remote_addr;
852 	struct c4iw_wr_wait *wr_waitp;
853 	unsigned long flags;
854 	unsigned long history;
855 };
856 
857 struct c4iw_listen_ep {
858 	struct c4iw_ep_common com;
859 	unsigned int stid;
860 	int backlog;
861 };
862 
863 struct c4iw_ep_stats {
864 	unsigned connect_neg_adv;
865 	unsigned abort_neg_adv;
866 };
867 
868 struct c4iw_ep {
869 	struct c4iw_ep_common com;
870 	struct c4iw_ep *parent_ep;
871 	struct timer_list timer;
872 	struct list_head entry;
873 	unsigned int atid;
874 	u32 hwtid;
875 	u32 snd_seq;
876 	u32 rcv_seq;
877 	struct l2t_entry *l2t;
878 	struct dst_entry *dst;
879 	struct sk_buff *mpa_skb;
880 	struct c4iw_mpa_attributes mpa_attr;
881 	u8 mpa_pkt[sizeof(struct mpa_message) + MPA_MAX_PRIVATE_DATA];
882 	unsigned int mpa_pkt_len;
883 	u32 ird;
884 	u32 ord;
885 	u32 smac_idx;
886 	u32 tx_chan;
887 	u32 mtu;
888 	u16 mss;
889 	u16 emss;
890 	u16 plen;
891 	u16 rss_qid;
892 	u16 txq_idx;
893 	u16 ctrlq_idx;
894 	u8 tos;
895 	u8 retry_with_mpa_v1;
896 	u8 tried_with_mpa_v1;
897 	unsigned int retry_count;
898 	int snd_win;
899 	int rcv_win;
900 	u32 snd_wscale;
901 	struct c4iw_ep_stats stats;
902 	u32 srqe_idx;
903 	u32 rx_pdu_out_cnt;
904 	struct sk_buff *peer_abort_skb;
905 };
906 
907 static inline struct c4iw_ep *to_ep(struct iw_cm_id *cm_id)
908 {
909 	return cm_id->provider_data;
910 }
911 
912 static inline struct c4iw_listen_ep *to_listen_ep(struct iw_cm_id *cm_id)
913 {
914 	return cm_id->provider_data;
915 }
916 
917 static inline int ocqp_supported(const struct cxgb4_lld_info *infop)
918 {
919 #if defined(__i386__) || defined(__x86_64__) || defined(CONFIG_PPC64)
920 	return infop->vr->ocq.size > 0;
921 #else
922 	return 0;
923 #endif
924 }
925 
926 u32 c4iw_id_alloc(struct c4iw_id_table *alloc);
927 void c4iw_id_free(struct c4iw_id_table *alloc, u32 obj);
928 int c4iw_id_table_alloc(struct c4iw_id_table *alloc, u32 start, u32 num,
929 			u32 reserved, u32 flags);
930 void c4iw_id_table_free(struct c4iw_id_table *alloc);
931 
932 typedef int (*c4iw_handler_func)(struct c4iw_dev *dev, struct sk_buff *skb);
933 
934 int c4iw_ep_redirect(void *ctx, struct dst_entry *old, struct dst_entry *new,
935 		     struct l2t_entry *l2t);
936 void c4iw_put_qpid(struct c4iw_rdev *rdev, u32 qpid,
937 		   struct c4iw_dev_ucontext *uctx);
938 u32 c4iw_get_resource(struct c4iw_id_table *id_table);
939 void c4iw_put_resource(struct c4iw_id_table *id_table, u32 entry);
940 int c4iw_init_resource(struct c4iw_rdev *rdev, u32 nr_tpt,
941 		       u32 nr_pdid, u32 nr_srqt);
942 int c4iw_init_ctrl_qp(struct c4iw_rdev *rdev);
943 int c4iw_pblpool_create(struct c4iw_rdev *rdev);
944 int c4iw_rqtpool_create(struct c4iw_rdev *rdev);
945 int c4iw_ocqp_pool_create(struct c4iw_rdev *rdev);
946 void c4iw_pblpool_destroy(struct c4iw_rdev *rdev);
947 void c4iw_rqtpool_destroy(struct c4iw_rdev *rdev);
948 void c4iw_ocqp_pool_destroy(struct c4iw_rdev *rdev);
949 void c4iw_destroy_resource(struct c4iw_resource *rscp);
950 int c4iw_destroy_ctrl_qp(struct c4iw_rdev *rdev);
951 void c4iw_register_device(struct work_struct *work);
952 void c4iw_unregister_device(struct c4iw_dev *dev);
953 int __init c4iw_cm_init(void);
954 void c4iw_cm_term(void);
955 void c4iw_release_dev_ucontext(struct c4iw_rdev *rdev,
956 			       struct c4iw_dev_ucontext *uctx);
957 void c4iw_init_dev_ucontext(struct c4iw_rdev *rdev,
958 			    struct c4iw_dev_ucontext *uctx);
959 int c4iw_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc);
960 int c4iw_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr,
961 		   const struct ib_send_wr **bad_wr);
962 int c4iw_post_receive(struct ib_qp *ibqp, const struct ib_recv_wr *wr,
963 		      const struct ib_recv_wr **bad_wr);
964 int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param);
965 int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog);
966 int c4iw_destroy_listen(struct iw_cm_id *cm_id);
967 int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param);
968 int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len);
969 void c4iw_qp_add_ref(struct ib_qp *qp);
970 void c4iw_qp_rem_ref(struct ib_qp *qp);
971 struct ib_mr *c4iw_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type,
972 			    u32 max_num_sg);
973 int c4iw_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents,
974 		   unsigned int *sg_offset);
975 void c4iw_dealloc(struct uld_ctx *ctx);
976 struct ib_mr *c4iw_reg_user_mr(struct ib_pd *pd, u64 start,
977 					   u64 length, u64 virt, int acc,
978 					   struct ib_udata *udata);
979 struct ib_mr *c4iw_get_dma_mr(struct ib_pd *pd, int acc);
980 int c4iw_dereg_mr(struct ib_mr *ib_mr, struct ib_udata *udata);
981 int c4iw_destroy_cq(struct ib_cq *ib_cq, struct ib_udata *udata);
982 void c4iw_cq_rem_ref(struct c4iw_cq *chp);
983 int c4iw_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
984 		   struct ib_udata *udata);
985 int c4iw_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags);
986 int c4iw_modify_srq(struct ib_srq *ib_srq, struct ib_srq_attr *attr,
987 		    enum ib_srq_attr_mask srq_attr_mask,
988 		    struct ib_udata *udata);
989 int c4iw_destroy_srq(struct ib_srq *ib_srq, struct ib_udata *udata);
990 int c4iw_create_srq(struct ib_srq *srq, struct ib_srq_init_attr *attrs,
991 		    struct ib_udata *udata);
992 int c4iw_destroy_qp(struct ib_qp *ib_qp, struct ib_udata *udata);
993 int c4iw_create_qp(struct ib_qp *qp, struct ib_qp_init_attr *attrs,
994 		   struct ib_udata *udata);
995 int c4iw_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
996 				 int attr_mask, struct ib_udata *udata);
997 int c4iw_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
998 		     int attr_mask, struct ib_qp_init_attr *init_attr);
999 struct ib_qp *c4iw_get_qp(struct ib_device *dev, int qpn);
1000 u32 c4iw_rqtpool_alloc(struct c4iw_rdev *rdev, int size);
1001 void c4iw_rqtpool_free(struct c4iw_rdev *rdev, u32 addr, int size);
1002 u32 c4iw_pblpool_alloc(struct c4iw_rdev *rdev, int size);
1003 void c4iw_pblpool_free(struct c4iw_rdev *rdev, u32 addr, int size);
1004 u32 c4iw_ocqp_pool_alloc(struct c4iw_rdev *rdev, int size);
1005 void c4iw_ocqp_pool_free(struct c4iw_rdev *rdev, u32 addr, int size);
1006 void c4iw_flush_hw_cq(struct c4iw_cq *chp, struct c4iw_qp *flush_qhp);
1007 void c4iw_count_rcqes(struct t4_cq *cq, struct t4_wq *wq, int *count);
1008 int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp);
1009 int c4iw_flush_rq(struct t4_wq *wq, struct t4_cq *cq, int count);
1010 int c4iw_flush_sq(struct c4iw_qp *qhp);
1011 int c4iw_ev_handler(struct c4iw_dev *rnicp, u32 qid);
1012 u16 c4iw_rqes_posted(struct c4iw_qp *qhp);
1013 int c4iw_post_terminate(struct c4iw_qp *qhp, struct t4_cqe *err_cqe);
1014 u32 c4iw_get_cqid(struct c4iw_rdev *rdev, struct c4iw_dev_ucontext *uctx);
1015 void c4iw_put_cqid(struct c4iw_rdev *rdev, u32 qid,
1016 		struct c4iw_dev_ucontext *uctx);
1017 u32 c4iw_get_qpid(struct c4iw_rdev *rdev, struct c4iw_dev_ucontext *uctx);
1018 void c4iw_put_qpid(struct c4iw_rdev *rdev, u32 qid,
1019 		struct c4iw_dev_ucontext *uctx);
1020 void c4iw_ev_dispatch(struct c4iw_dev *dev, struct t4_cqe *err_cqe);
1021 
1022 extern struct cxgb4_client t4c_client;
1023 extern c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS];
1024 void __iomem *c4iw_bar2_addrs(struct c4iw_rdev *rdev, unsigned int qid,
1025 			      enum cxgb4_bar2_qtype qtype,
1026 			      unsigned int *pbar2_qid, u64 *pbar2_pa);
1027 int c4iw_alloc_srq_idx(struct c4iw_rdev *rdev);
1028 void c4iw_free_srq_idx(struct c4iw_rdev *rdev, int idx);
1029 extern void c4iw_log_wr_stats(struct t4_wq *wq, struct t4_cqe *cqe);
1030 extern int c4iw_wr_log;
1031 extern int db_fc_threshold;
1032 extern int db_coalescing_threshold;
1033 extern int use_dsgl;
1034 void c4iw_invalidate_mr(struct c4iw_dev *rhp, u32 rkey);
1035 void c4iw_dispatch_srq_limit_reached_event(struct c4iw_srq *srq);
1036 void c4iw_copy_wr_to_srq(struct t4_srq *srq, union t4_recv_wr *wqe, u8 len16);
1037 void c4iw_flush_srqidx(struct c4iw_qp *qhp, u32 srqidx);
1038 int c4iw_post_srq_recv(struct ib_srq *ibsrq, const struct ib_recv_wr *wr,
1039 		       const struct ib_recv_wr **bad_wr);
1040 struct c4iw_wr_wait *c4iw_alloc_wr_wait(gfp_t gfp);
1041 
1042 int c4iw_fill_res_mr_entry(struct sk_buff *msg, struct ib_mr *ibmr);
1043 int c4iw_fill_res_cq_entry(struct sk_buff *msg, struct ib_cq *ibcq);
1044 int c4iw_fill_res_qp_entry(struct sk_buff *msg, struct ib_qp *ibqp);
1045 int c4iw_fill_res_cm_id_entry(struct sk_buff *msg, struct rdma_cm_id *cm_id);
1046 
1047 #endif
1048