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_dev *rdev_to_c4iw_dev(struct c4iw_rdev *rdev)
345 {
346 	return container_of(rdev, struct c4iw_dev, rdev);
347 }
348 
349 static inline struct c4iw_cq *get_chp(struct c4iw_dev *rhp, u32 cqid)
350 {
351 	return xa_load(&rhp->cqs, cqid);
352 }
353 
354 static inline struct c4iw_qp *get_qhp(struct c4iw_dev *rhp, u32 qpid)
355 {
356 	return xa_load(&rhp->qps, qpid);
357 }
358 
359 extern uint c4iw_max_read_depth;
360 
361 static inline int cur_max_read_depth(struct c4iw_dev *dev)
362 {
363 	return min(dev->rdev.lldi.max_ordird_qp, c4iw_max_read_depth);
364 }
365 
366 struct c4iw_pd {
367 	struct ib_pd ibpd;
368 	u32 pdid;
369 	struct c4iw_dev *rhp;
370 };
371 
372 static inline struct c4iw_pd *to_c4iw_pd(struct ib_pd *ibpd)
373 {
374 	return container_of(ibpd, struct c4iw_pd, ibpd);
375 }
376 
377 struct tpt_attributes {
378 	u64 len;
379 	u64 va_fbo;
380 	enum fw_ri_mem_perms perms;
381 	u32 stag;
382 	u32 pdid;
383 	u32 qpid;
384 	u32 pbl_addr;
385 	u32 pbl_size;
386 	u32 state:1;
387 	u32 type:2;
388 	u32 rsvd:1;
389 	u32 remote_invaliate_disable:1;
390 	u32 zbva:1;
391 	u32 mw_bind_enable:1;
392 	u32 page_size:5;
393 };
394 
395 struct c4iw_mr {
396 	struct ib_mr ibmr;
397 	struct ib_umem *umem;
398 	struct c4iw_dev *rhp;
399 	struct sk_buff *dereg_skb;
400 	u64 kva;
401 	struct tpt_attributes attr;
402 	u64 *mpl;
403 	dma_addr_t mpl_addr;
404 	u32 max_mpl_len;
405 	u32 mpl_len;
406 	struct c4iw_wr_wait *wr_waitp;
407 };
408 
409 static inline struct c4iw_mr *to_c4iw_mr(struct ib_mr *ibmr)
410 {
411 	return container_of(ibmr, struct c4iw_mr, ibmr);
412 }
413 
414 struct c4iw_mw {
415 	struct ib_mw ibmw;
416 	struct c4iw_dev *rhp;
417 	struct sk_buff *dereg_skb;
418 	u64 kva;
419 	struct tpt_attributes attr;
420 	struct c4iw_wr_wait *wr_waitp;
421 };
422 
423 static inline struct c4iw_mw *to_c4iw_mw(struct ib_mw *ibmw)
424 {
425 	return container_of(ibmw, struct c4iw_mw, ibmw);
426 }
427 
428 struct c4iw_cq {
429 	struct ib_cq ibcq;
430 	struct c4iw_dev *rhp;
431 	struct sk_buff *destroy_skb;
432 	struct t4_cq cq;
433 	spinlock_t lock;
434 	spinlock_t comp_handler_lock;
435 	atomic_t refcnt;
436 	wait_queue_head_t wait;
437 	struct c4iw_wr_wait *wr_waitp;
438 };
439 
440 static inline struct c4iw_cq *to_c4iw_cq(struct ib_cq *ibcq)
441 {
442 	return container_of(ibcq, struct c4iw_cq, ibcq);
443 }
444 
445 struct c4iw_mpa_attributes {
446 	u8 initiator;
447 	u8 recv_marker_enabled;
448 	u8 xmit_marker_enabled;
449 	u8 crc_enabled;
450 	u8 enhanced_rdma_conn;
451 	u8 version;
452 	u8 p2p_type;
453 };
454 
455 struct c4iw_qp_attributes {
456 	u32 scq;
457 	u32 rcq;
458 	u32 sq_num_entries;
459 	u32 rq_num_entries;
460 	u32 sq_max_sges;
461 	u32 sq_max_sges_rdma_write;
462 	u32 rq_max_sges;
463 	u32 state;
464 	u8 enable_rdma_read;
465 	u8 enable_rdma_write;
466 	u8 enable_bind;
467 	u8 enable_mmid0_fastreg;
468 	u32 max_ord;
469 	u32 max_ird;
470 	u32 pd;
471 	u32 next_state;
472 	char terminate_buffer[52];
473 	u32 terminate_msg_len;
474 	u8 is_terminate_local;
475 	struct c4iw_mpa_attributes mpa_attr;
476 	struct c4iw_ep *llp_stream_handle;
477 	u8 layer_etype;
478 	u8 ecode;
479 	u16 sq_db_inc;
480 	u16 rq_db_inc;
481 	u8 send_term;
482 };
483 
484 struct c4iw_qp {
485 	struct ib_qp ibqp;
486 	struct list_head db_fc_entry;
487 	struct c4iw_dev *rhp;
488 	struct c4iw_ep *ep;
489 	struct c4iw_qp_attributes attr;
490 	struct t4_wq wq;
491 	spinlock_t lock;
492 	struct mutex mutex;
493 	wait_queue_head_t wait;
494 	int sq_sig_all;
495 	struct c4iw_srq *srq;
496 	struct c4iw_ucontext *ucontext;
497 	struct c4iw_wr_wait *wr_waitp;
498 	struct completion qp_rel_comp;
499 	refcount_t qp_refcnt;
500 };
501 
502 static inline struct c4iw_qp *to_c4iw_qp(struct ib_qp *ibqp)
503 {
504 	return container_of(ibqp, struct c4iw_qp, ibqp);
505 }
506 
507 struct c4iw_srq {
508 	struct ib_srq ibsrq;
509 	struct list_head db_fc_entry;
510 	struct c4iw_dev *rhp;
511 	struct t4_srq wq;
512 	struct sk_buff *destroy_skb;
513 	u32 srq_limit;
514 	u32 pdid;
515 	int idx;
516 	u32 flags;
517 	spinlock_t lock; /* protects srq */
518 	struct c4iw_wr_wait *wr_waitp;
519 	bool armed;
520 };
521 
522 static inline struct c4iw_srq *to_c4iw_srq(struct ib_srq *ibsrq)
523 {
524 	return container_of(ibsrq, struct c4iw_srq, ibsrq);
525 }
526 
527 struct c4iw_ucontext {
528 	struct ib_ucontext ibucontext;
529 	struct c4iw_dev_ucontext uctx;
530 	u32 key;
531 	spinlock_t mmap_lock;
532 	struct list_head mmaps;
533 	bool is_32b_cqe;
534 };
535 
536 static inline struct c4iw_ucontext *to_c4iw_ucontext(struct ib_ucontext *c)
537 {
538 	return container_of(c, struct c4iw_ucontext, ibucontext);
539 }
540 
541 struct c4iw_mm_entry {
542 	struct list_head entry;
543 	u64 addr;
544 	u32 key;
545 	unsigned len;
546 };
547 
548 static inline struct c4iw_mm_entry *remove_mmap(struct c4iw_ucontext *ucontext,
549 						u32 key, unsigned len)
550 {
551 	struct list_head *pos, *nxt;
552 	struct c4iw_mm_entry *mm;
553 
554 	spin_lock(&ucontext->mmap_lock);
555 	list_for_each_safe(pos, nxt, &ucontext->mmaps) {
556 
557 		mm = list_entry(pos, struct c4iw_mm_entry, entry);
558 		if (mm->key == key && mm->len == len) {
559 			list_del_init(&mm->entry);
560 			spin_unlock(&ucontext->mmap_lock);
561 			pr_debug("key 0x%x addr 0x%llx len %d\n", key,
562 				 (unsigned long long)mm->addr, mm->len);
563 			return mm;
564 		}
565 	}
566 	spin_unlock(&ucontext->mmap_lock);
567 	return NULL;
568 }
569 
570 static inline void insert_mmap(struct c4iw_ucontext *ucontext,
571 			       struct c4iw_mm_entry *mm)
572 {
573 	spin_lock(&ucontext->mmap_lock);
574 	pr_debug("key 0x%x addr 0x%llx len %d\n",
575 		 mm->key, (unsigned long long)mm->addr, mm->len);
576 	list_add_tail(&mm->entry, &ucontext->mmaps);
577 	spin_unlock(&ucontext->mmap_lock);
578 }
579 
580 enum c4iw_qp_attr_mask {
581 	C4IW_QP_ATTR_NEXT_STATE = 1 << 0,
582 	C4IW_QP_ATTR_SQ_DB = 1<<1,
583 	C4IW_QP_ATTR_RQ_DB = 1<<2,
584 	C4IW_QP_ATTR_ENABLE_RDMA_READ = 1 << 7,
585 	C4IW_QP_ATTR_ENABLE_RDMA_WRITE = 1 << 8,
586 	C4IW_QP_ATTR_ENABLE_RDMA_BIND = 1 << 9,
587 	C4IW_QP_ATTR_MAX_ORD = 1 << 11,
588 	C4IW_QP_ATTR_MAX_IRD = 1 << 12,
589 	C4IW_QP_ATTR_LLP_STREAM_HANDLE = 1 << 22,
590 	C4IW_QP_ATTR_STREAM_MSG_BUFFER = 1 << 23,
591 	C4IW_QP_ATTR_MPA_ATTR = 1 << 24,
592 	C4IW_QP_ATTR_QP_CONTEXT_ACTIVATE = 1 << 25,
593 	C4IW_QP_ATTR_VALID_MODIFY = (C4IW_QP_ATTR_ENABLE_RDMA_READ |
594 				     C4IW_QP_ATTR_ENABLE_RDMA_WRITE |
595 				     C4IW_QP_ATTR_MAX_ORD |
596 				     C4IW_QP_ATTR_MAX_IRD |
597 				     C4IW_QP_ATTR_LLP_STREAM_HANDLE |
598 				     C4IW_QP_ATTR_STREAM_MSG_BUFFER |
599 				     C4IW_QP_ATTR_MPA_ATTR |
600 				     C4IW_QP_ATTR_QP_CONTEXT_ACTIVATE)
601 };
602 
603 int c4iw_modify_qp(struct c4iw_dev *rhp,
604 				struct c4iw_qp *qhp,
605 				enum c4iw_qp_attr_mask mask,
606 				struct c4iw_qp_attributes *attrs,
607 				int internal);
608 
609 enum c4iw_qp_state {
610 	C4IW_QP_STATE_IDLE,
611 	C4IW_QP_STATE_RTS,
612 	C4IW_QP_STATE_ERROR,
613 	C4IW_QP_STATE_TERMINATE,
614 	C4IW_QP_STATE_CLOSING,
615 	C4IW_QP_STATE_TOT
616 };
617 
618 static inline int c4iw_convert_state(enum ib_qp_state ib_state)
619 {
620 	switch (ib_state) {
621 	case IB_QPS_RESET:
622 	case IB_QPS_INIT:
623 		return C4IW_QP_STATE_IDLE;
624 	case IB_QPS_RTS:
625 		return C4IW_QP_STATE_RTS;
626 	case IB_QPS_SQD:
627 		return C4IW_QP_STATE_CLOSING;
628 	case IB_QPS_SQE:
629 		return C4IW_QP_STATE_TERMINATE;
630 	case IB_QPS_ERR:
631 		return C4IW_QP_STATE_ERROR;
632 	default:
633 		return -1;
634 	}
635 }
636 
637 static inline int to_ib_qp_state(int c4iw_qp_state)
638 {
639 	switch (c4iw_qp_state) {
640 	case C4IW_QP_STATE_IDLE:
641 		return IB_QPS_INIT;
642 	case C4IW_QP_STATE_RTS:
643 		return IB_QPS_RTS;
644 	case C4IW_QP_STATE_CLOSING:
645 		return IB_QPS_SQD;
646 	case C4IW_QP_STATE_TERMINATE:
647 		return IB_QPS_SQE;
648 	case C4IW_QP_STATE_ERROR:
649 		return IB_QPS_ERR;
650 	}
651 	return IB_QPS_ERR;
652 }
653 
654 static inline u32 c4iw_ib_to_tpt_access(int a)
655 {
656 	return (a & IB_ACCESS_REMOTE_WRITE ? FW_RI_MEM_ACCESS_REM_WRITE : 0) |
657 	       (a & IB_ACCESS_REMOTE_READ ? FW_RI_MEM_ACCESS_REM_READ : 0) |
658 	       (a & IB_ACCESS_LOCAL_WRITE ? FW_RI_MEM_ACCESS_LOCAL_WRITE : 0) |
659 	       FW_RI_MEM_ACCESS_LOCAL_READ;
660 }
661 
662 static inline u32 c4iw_ib_to_tpt_bind_access(int acc)
663 {
664 	return (acc & IB_ACCESS_REMOTE_WRITE ? FW_RI_MEM_ACCESS_REM_WRITE : 0) |
665 	       (acc & IB_ACCESS_REMOTE_READ ? FW_RI_MEM_ACCESS_REM_READ : 0);
666 }
667 
668 enum c4iw_mmid_state {
669 	C4IW_STAG_STATE_VALID,
670 	C4IW_STAG_STATE_INVALID
671 };
672 
673 #define C4IW_NODE_DESC "cxgb4 Chelsio Communications"
674 
675 #define MPA_KEY_REQ "MPA ID Req Frame"
676 #define MPA_KEY_REP "MPA ID Rep Frame"
677 
678 #define MPA_MAX_PRIVATE_DATA	256
679 #define MPA_ENHANCED_RDMA_CONN	0x10
680 #define MPA_REJECT		0x20
681 #define MPA_CRC			0x40
682 #define MPA_MARKERS		0x80
683 #define MPA_FLAGS_MASK		0xE0
684 
685 #define MPA_V2_PEER2PEER_MODEL          0x8000
686 #define MPA_V2_ZERO_LEN_FPDU_RTR        0x4000
687 #define MPA_V2_RDMA_WRITE_RTR           0x8000
688 #define MPA_V2_RDMA_READ_RTR            0x4000
689 #define MPA_V2_IRD_ORD_MASK             0x3FFF
690 
691 #define c4iw_put_ep(ep) {						\
692 	pr_debug("put_ep ep %p refcnt %d\n",		\
693 		 ep, kref_read(&((ep)->kref)));				\
694 	WARN_ON(kref_read(&((ep)->kref)) < 1);				\
695 	kref_put(&((ep)->kref), _c4iw_free_ep);				\
696 }
697 
698 #define c4iw_get_ep(ep) {						\
699 	pr_debug("get_ep ep %p, refcnt %d\n",		\
700 		 ep, kref_read(&((ep)->kref)));				\
701 	kref_get(&((ep)->kref));					\
702 }
703 void _c4iw_free_ep(struct kref *kref);
704 
705 struct mpa_message {
706 	u8 key[16];
707 	u8 flags;
708 	u8 revision;
709 	__be16 private_data_size;
710 	u8 private_data[];
711 };
712 
713 struct mpa_v2_conn_params {
714 	__be16 ird;
715 	__be16 ord;
716 };
717 
718 struct terminate_message {
719 	u8 layer_etype;
720 	u8 ecode;
721 	__be16 hdrct_rsvd;
722 	u8 len_hdrs[];
723 };
724 
725 #define TERM_MAX_LENGTH (sizeof(struct terminate_message) + 2 + 18 + 28)
726 
727 enum c4iw_layers_types {
728 	LAYER_RDMAP		= 0x00,
729 	LAYER_DDP		= 0x10,
730 	LAYER_MPA		= 0x20,
731 	RDMAP_LOCAL_CATA	= 0x00,
732 	RDMAP_REMOTE_PROT	= 0x01,
733 	RDMAP_REMOTE_OP		= 0x02,
734 	DDP_LOCAL_CATA		= 0x00,
735 	DDP_TAGGED_ERR		= 0x01,
736 	DDP_UNTAGGED_ERR	= 0x02,
737 	DDP_LLP			= 0x03
738 };
739 
740 enum c4iw_rdma_ecodes {
741 	RDMAP_INV_STAG		= 0x00,
742 	RDMAP_BASE_BOUNDS	= 0x01,
743 	RDMAP_ACC_VIOL		= 0x02,
744 	RDMAP_STAG_NOT_ASSOC	= 0x03,
745 	RDMAP_TO_WRAP		= 0x04,
746 	RDMAP_INV_VERS		= 0x05,
747 	RDMAP_INV_OPCODE	= 0x06,
748 	RDMAP_STREAM_CATA	= 0x07,
749 	RDMAP_GLOBAL_CATA	= 0x08,
750 	RDMAP_CANT_INV_STAG	= 0x09,
751 	RDMAP_UNSPECIFIED	= 0xff
752 };
753 
754 enum c4iw_ddp_ecodes {
755 	DDPT_INV_STAG		= 0x00,
756 	DDPT_BASE_BOUNDS	= 0x01,
757 	DDPT_STAG_NOT_ASSOC	= 0x02,
758 	DDPT_TO_WRAP		= 0x03,
759 	DDPT_INV_VERS		= 0x04,
760 	DDPU_INV_QN		= 0x01,
761 	DDPU_INV_MSN_NOBUF	= 0x02,
762 	DDPU_INV_MSN_RANGE	= 0x03,
763 	DDPU_INV_MO		= 0x04,
764 	DDPU_MSG_TOOBIG		= 0x05,
765 	DDPU_INV_VERS		= 0x06
766 };
767 
768 enum c4iw_mpa_ecodes {
769 	MPA_CRC_ERR		= 0x02,
770 	MPA_MARKER_ERR          = 0x03,
771 	MPA_LOCAL_CATA          = 0x05,
772 	MPA_INSUFF_IRD          = 0x06,
773 	MPA_NOMATCH_RTR         = 0x07,
774 };
775 
776 enum c4iw_ep_state {
777 	IDLE = 0,
778 	LISTEN,
779 	CONNECTING,
780 	MPA_REQ_WAIT,
781 	MPA_REQ_SENT,
782 	MPA_REQ_RCVD,
783 	MPA_REP_SENT,
784 	FPDU_MODE,
785 	ABORTING,
786 	CLOSING,
787 	MORIBUND,
788 	DEAD,
789 };
790 
791 enum c4iw_ep_flags {
792 	PEER_ABORT_IN_PROGRESS	= 0,
793 	ABORT_REQ_IN_PROGRESS	= 1,
794 	RELEASE_RESOURCES	= 2,
795 	CLOSE_SENT		= 3,
796 	TIMEOUT                 = 4,
797 	QP_REFERENCED           = 5,
798 	STOP_MPA_TIMER		= 7,
799 };
800 
801 enum c4iw_ep_history {
802 	ACT_OPEN_REQ            = 0,
803 	ACT_OFLD_CONN           = 1,
804 	ACT_OPEN_RPL            = 2,
805 	ACT_ESTAB               = 3,
806 	PASS_ACCEPT_REQ         = 4,
807 	PASS_ESTAB              = 5,
808 	ABORT_UPCALL            = 6,
809 	ESTAB_UPCALL            = 7,
810 	CLOSE_UPCALL            = 8,
811 	ULP_ACCEPT              = 9,
812 	ULP_REJECT              = 10,
813 	TIMEDOUT                = 11,
814 	PEER_ABORT              = 12,
815 	PEER_CLOSE              = 13,
816 	CONNREQ_UPCALL          = 14,
817 	ABORT_CONN              = 15,
818 	DISCONN_UPCALL          = 16,
819 	EP_DISC_CLOSE           = 17,
820 	EP_DISC_ABORT           = 18,
821 	CONN_RPL_UPCALL         = 19,
822 	ACT_RETRY_NOMEM         = 20,
823 	ACT_RETRY_INUSE         = 21,
824 	CLOSE_CON_RPL		= 22,
825 	EP_DISC_FAIL		= 24,
826 	QP_REFED		= 25,
827 	QP_DEREFED		= 26,
828 	CM_ID_REFED		= 27,
829 	CM_ID_DEREFED		= 28,
830 };
831 
832 enum conn_pre_alloc_buffers {
833 	CN_ABORT_REQ_BUF,
834 	CN_ABORT_RPL_BUF,
835 	CN_CLOSE_CON_REQ_BUF,
836 	CN_DESTROY_BUF,
837 	CN_FLOWC_BUF,
838 	CN_MAX_CON_BUF
839 };
840 
841 enum {
842 	FLOWC_LEN = offsetof(struct fw_flowc_wr, mnemval[FW_FLOWC_MNEM_MAX])
843 };
844 
845 union cpl_wr_size {
846 	struct cpl_abort_req abrt_req;
847 	struct cpl_abort_rpl abrt_rpl;
848 	struct fw_ri_wr ri_req;
849 	struct cpl_close_con_req close_req;
850 	char flowc_buf[FLOWC_LEN];
851 };
852 
853 struct c4iw_ep_common {
854 	struct iw_cm_id *cm_id;
855 	struct c4iw_qp *qp;
856 	struct c4iw_dev *dev;
857 	struct sk_buff_head ep_skb_list;
858 	enum c4iw_ep_state state;
859 	struct kref kref;
860 	struct mutex mutex;
861 	struct sockaddr_storage local_addr;
862 	struct sockaddr_storage remote_addr;
863 	struct c4iw_wr_wait *wr_waitp;
864 	unsigned long flags;
865 	unsigned long history;
866 };
867 
868 struct c4iw_listen_ep {
869 	struct c4iw_ep_common com;
870 	unsigned int stid;
871 	int backlog;
872 };
873 
874 struct c4iw_ep_stats {
875 	unsigned connect_neg_adv;
876 	unsigned abort_neg_adv;
877 };
878 
879 struct c4iw_ep {
880 	struct c4iw_ep_common com;
881 	struct c4iw_ep *parent_ep;
882 	struct timer_list timer;
883 	struct list_head entry;
884 	unsigned int atid;
885 	u32 hwtid;
886 	u32 snd_seq;
887 	u32 rcv_seq;
888 	struct l2t_entry *l2t;
889 	struct dst_entry *dst;
890 	struct sk_buff *mpa_skb;
891 	struct c4iw_mpa_attributes mpa_attr;
892 	u8 mpa_pkt[sizeof(struct mpa_message) + MPA_MAX_PRIVATE_DATA];
893 	unsigned int mpa_pkt_len;
894 	u32 ird;
895 	u32 ord;
896 	u32 smac_idx;
897 	u32 tx_chan;
898 	u32 mtu;
899 	u16 mss;
900 	u16 emss;
901 	u16 plen;
902 	u16 rss_qid;
903 	u16 txq_idx;
904 	u16 ctrlq_idx;
905 	u8 tos;
906 	u8 retry_with_mpa_v1;
907 	u8 tried_with_mpa_v1;
908 	unsigned int retry_count;
909 	int snd_win;
910 	int rcv_win;
911 	u32 snd_wscale;
912 	struct c4iw_ep_stats stats;
913 	u32 srqe_idx;
914 	u32 rx_pdu_out_cnt;
915 	struct sk_buff *peer_abort_skb;
916 };
917 
918 static inline struct c4iw_ep *to_ep(struct iw_cm_id *cm_id)
919 {
920 	return cm_id->provider_data;
921 }
922 
923 static inline struct c4iw_listen_ep *to_listen_ep(struct iw_cm_id *cm_id)
924 {
925 	return cm_id->provider_data;
926 }
927 
928 static inline int ocqp_supported(const struct cxgb4_lld_info *infop)
929 {
930 #if defined(__i386__) || defined(__x86_64__) || defined(CONFIG_PPC64)
931 	return infop->vr->ocq.size > 0;
932 #else
933 	return 0;
934 #endif
935 }
936 
937 u32 c4iw_id_alloc(struct c4iw_id_table *alloc);
938 void c4iw_id_free(struct c4iw_id_table *alloc, u32 obj);
939 int c4iw_id_table_alloc(struct c4iw_id_table *alloc, u32 start, u32 num,
940 			u32 reserved, u32 flags);
941 void c4iw_id_table_free(struct c4iw_id_table *alloc);
942 
943 typedef int (*c4iw_handler_func)(struct c4iw_dev *dev, struct sk_buff *skb);
944 
945 int c4iw_ep_redirect(void *ctx, struct dst_entry *old, struct dst_entry *new,
946 		     struct l2t_entry *l2t);
947 void c4iw_put_qpid(struct c4iw_rdev *rdev, u32 qpid,
948 		   struct c4iw_dev_ucontext *uctx);
949 u32 c4iw_get_resource(struct c4iw_id_table *id_table);
950 void c4iw_put_resource(struct c4iw_id_table *id_table, u32 entry);
951 int c4iw_init_resource(struct c4iw_rdev *rdev, u32 nr_tpt,
952 		       u32 nr_pdid, u32 nr_srqt);
953 int c4iw_init_ctrl_qp(struct c4iw_rdev *rdev);
954 int c4iw_pblpool_create(struct c4iw_rdev *rdev);
955 int c4iw_rqtpool_create(struct c4iw_rdev *rdev);
956 int c4iw_ocqp_pool_create(struct c4iw_rdev *rdev);
957 void c4iw_pblpool_destroy(struct c4iw_rdev *rdev);
958 void c4iw_rqtpool_destroy(struct c4iw_rdev *rdev);
959 void c4iw_ocqp_pool_destroy(struct c4iw_rdev *rdev);
960 void c4iw_destroy_resource(struct c4iw_resource *rscp);
961 int c4iw_destroy_ctrl_qp(struct c4iw_rdev *rdev);
962 void c4iw_register_device(struct work_struct *work);
963 void c4iw_unregister_device(struct c4iw_dev *dev);
964 int __init c4iw_cm_init(void);
965 void c4iw_cm_term(void);
966 void c4iw_release_dev_ucontext(struct c4iw_rdev *rdev,
967 			       struct c4iw_dev_ucontext *uctx);
968 void c4iw_init_dev_ucontext(struct c4iw_rdev *rdev,
969 			    struct c4iw_dev_ucontext *uctx);
970 int c4iw_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc);
971 int c4iw_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr,
972 		   const struct ib_send_wr **bad_wr);
973 int c4iw_post_receive(struct ib_qp *ibqp, const struct ib_recv_wr *wr,
974 		      const struct ib_recv_wr **bad_wr);
975 int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param);
976 int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog);
977 int c4iw_destroy_listen(struct iw_cm_id *cm_id);
978 int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param);
979 int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len);
980 void c4iw_qp_add_ref(struct ib_qp *qp);
981 void c4iw_qp_rem_ref(struct ib_qp *qp);
982 struct ib_mr *c4iw_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type,
983 			    u32 max_num_sg);
984 int c4iw_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents,
985 		   unsigned int *sg_offset);
986 int c4iw_dealloc_mw(struct ib_mw *mw);
987 void c4iw_dealloc(struct uld_ctx *ctx);
988 struct ib_mw *c4iw_alloc_mw(struct ib_pd *pd, enum ib_mw_type type,
989 			    struct ib_udata *udata);
990 struct ib_mr *c4iw_reg_user_mr(struct ib_pd *pd, u64 start,
991 					   u64 length, u64 virt, int acc,
992 					   struct ib_udata *udata);
993 struct ib_mr *c4iw_get_dma_mr(struct ib_pd *pd, int acc);
994 int c4iw_dereg_mr(struct ib_mr *ib_mr, struct ib_udata *udata);
995 void c4iw_destroy_cq(struct ib_cq *ib_cq, struct ib_udata *udata);
996 int c4iw_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
997 		   struct ib_udata *udata);
998 int c4iw_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags);
999 int c4iw_modify_srq(struct ib_srq *ib_srq, struct ib_srq_attr *attr,
1000 		    enum ib_srq_attr_mask srq_attr_mask,
1001 		    struct ib_udata *udata);
1002 void c4iw_destroy_srq(struct ib_srq *ib_srq, struct ib_udata *udata);
1003 int c4iw_create_srq(struct ib_srq *srq, struct ib_srq_init_attr *attrs,
1004 		    struct ib_udata *udata);
1005 int c4iw_destroy_qp(struct ib_qp *ib_qp, struct ib_udata *udata);
1006 struct ib_qp *c4iw_create_qp(struct ib_pd *pd,
1007 			     struct ib_qp_init_attr *attrs,
1008 			     struct ib_udata *udata);
1009 int c4iw_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
1010 				 int attr_mask, struct ib_udata *udata);
1011 int c4iw_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
1012 		     int attr_mask, struct ib_qp_init_attr *init_attr);
1013 struct ib_qp *c4iw_get_qp(struct ib_device *dev, int qpn);
1014 u32 c4iw_rqtpool_alloc(struct c4iw_rdev *rdev, int size);
1015 void c4iw_rqtpool_free(struct c4iw_rdev *rdev, u32 addr, int size);
1016 u32 c4iw_pblpool_alloc(struct c4iw_rdev *rdev, int size);
1017 void c4iw_pblpool_free(struct c4iw_rdev *rdev, u32 addr, int size);
1018 u32 c4iw_ocqp_pool_alloc(struct c4iw_rdev *rdev, int size);
1019 void c4iw_ocqp_pool_free(struct c4iw_rdev *rdev, u32 addr, int size);
1020 void c4iw_flush_hw_cq(struct c4iw_cq *chp, struct c4iw_qp *flush_qhp);
1021 void c4iw_count_rcqes(struct t4_cq *cq, struct t4_wq *wq, int *count);
1022 int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp);
1023 int c4iw_flush_rq(struct t4_wq *wq, struct t4_cq *cq, int count);
1024 int c4iw_flush_sq(struct c4iw_qp *qhp);
1025 int c4iw_ev_handler(struct c4iw_dev *rnicp, u32 qid);
1026 u16 c4iw_rqes_posted(struct c4iw_qp *qhp);
1027 int c4iw_post_terminate(struct c4iw_qp *qhp, struct t4_cqe *err_cqe);
1028 u32 c4iw_get_cqid(struct c4iw_rdev *rdev, struct c4iw_dev_ucontext *uctx);
1029 void c4iw_put_cqid(struct c4iw_rdev *rdev, u32 qid,
1030 		struct c4iw_dev_ucontext *uctx);
1031 u32 c4iw_get_qpid(struct c4iw_rdev *rdev, struct c4iw_dev_ucontext *uctx);
1032 void c4iw_put_qpid(struct c4iw_rdev *rdev, u32 qid,
1033 		struct c4iw_dev_ucontext *uctx);
1034 void c4iw_ev_dispatch(struct c4iw_dev *dev, struct t4_cqe *err_cqe);
1035 
1036 extern struct cxgb4_client t4c_client;
1037 extern c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS];
1038 void __iomem *c4iw_bar2_addrs(struct c4iw_rdev *rdev, unsigned int qid,
1039 			      enum cxgb4_bar2_qtype qtype,
1040 			      unsigned int *pbar2_qid, u64 *pbar2_pa);
1041 int c4iw_alloc_srq_idx(struct c4iw_rdev *rdev);
1042 void c4iw_free_srq_idx(struct c4iw_rdev *rdev, int idx);
1043 extern void c4iw_log_wr_stats(struct t4_wq *wq, struct t4_cqe *cqe);
1044 extern int c4iw_wr_log;
1045 extern int db_fc_threshold;
1046 extern int db_coalescing_threshold;
1047 extern int use_dsgl;
1048 void c4iw_invalidate_mr(struct c4iw_dev *rhp, u32 rkey);
1049 void c4iw_dispatch_srq_limit_reached_event(struct c4iw_srq *srq);
1050 void c4iw_copy_wr_to_srq(struct t4_srq *srq, union t4_recv_wr *wqe, u8 len16);
1051 void c4iw_flush_srqidx(struct c4iw_qp *qhp, u32 srqidx);
1052 int c4iw_post_srq_recv(struct ib_srq *ibsrq, const struct ib_recv_wr *wr,
1053 		       const struct ib_recv_wr **bad_wr);
1054 struct c4iw_wr_wait *c4iw_alloc_wr_wait(gfp_t gfp);
1055 
1056 int c4iw_fill_res_mr_entry(struct sk_buff *msg, struct ib_mr *ibmr);
1057 int c4iw_fill_res_cq_entry(struct sk_buff *msg, struct ib_cq *ibcq);
1058 int c4iw_fill_res_qp_entry(struct sk_buff *msg, struct ib_qp *ibqp);
1059 int c4iw_fill_res_cm_id_entry(struct sk_buff *msg, struct rdma_cm_id *cm_id);
1060 
1061 #endif
1062