Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / drivers / infiniband / sw / rxe / rxe_verbs.h
blob1019f5e7dbddd2199b8c9e420159dfe9a7775683
1 /*
2 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
3 * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
34 #ifndef RXE_VERBS_H
35 #define RXE_VERBS_H
37 #include <linux/interrupt.h>
38 #include <linux/workqueue.h>
39 #include <rdma/rdma_user_rxe.h>
40 #include "rxe_pool.h"
41 #include "rxe_task.h"
42 #include "rxe_hw_counters.h"
44 static inline int pkey_match(u16 key1, u16 key2)
46 return (((key1 & 0x7fff) != 0) &&
47 ((key1 & 0x7fff) == (key2 & 0x7fff)) &&
48 ((key1 & 0x8000) || (key2 & 0x8000))) ? 1 : 0;
51 /* Return >0 if psn_a > psn_b
52 * 0 if psn_a == psn_b
53 * <0 if psn_a < psn_b
55 static inline int psn_compare(u32 psn_a, u32 psn_b)
57 s32 diff;
59 diff = (psn_a - psn_b) << 8;
60 return diff;
63 struct rxe_ucontext {
64 struct rxe_pool_entry pelem;
65 struct ib_ucontext ibuc;
68 struct rxe_pd {
69 struct rxe_pool_entry pelem;
70 struct ib_pd ibpd;
73 struct rxe_ah {
74 struct rxe_pool_entry pelem;
75 struct ib_ah ibah;
76 struct rxe_pd *pd;
77 struct rxe_av av;
80 struct rxe_cqe {
81 union {
82 struct ib_wc ibwc;
83 struct ib_uverbs_wc uibwc;
87 struct rxe_cq {
88 struct rxe_pool_entry pelem;
89 struct ib_cq ibcq;
90 struct rxe_queue *queue;
91 spinlock_t cq_lock;
92 u8 notify;
93 bool is_dying;
94 int is_user;
95 struct tasklet_struct comp_task;
98 enum wqe_state {
99 wqe_state_posted,
100 wqe_state_processing,
101 wqe_state_pending,
102 wqe_state_done,
103 wqe_state_error,
106 struct rxe_sq {
107 int max_wr;
108 int max_sge;
109 int max_inline;
110 spinlock_t sq_lock; /* guard queue */
111 struct rxe_queue *queue;
114 struct rxe_rq {
115 int max_wr;
116 int max_sge;
117 spinlock_t producer_lock; /* guard queue producer */
118 spinlock_t consumer_lock; /* guard queue consumer */
119 struct rxe_queue *queue;
122 struct rxe_srq {
123 struct rxe_pool_entry pelem;
124 struct ib_srq ibsrq;
125 struct rxe_pd *pd;
126 struct rxe_rq rq;
127 u32 srq_num;
129 int limit;
130 int error;
133 enum rxe_qp_state {
134 QP_STATE_RESET,
135 QP_STATE_INIT,
136 QP_STATE_READY,
137 QP_STATE_DRAIN, /* req only */
138 QP_STATE_DRAINED, /* req only */
139 QP_STATE_ERROR
142 extern char *rxe_qp_state_name[];
144 struct rxe_req_info {
145 enum rxe_qp_state state;
146 int wqe_index;
147 u32 psn;
148 int opcode;
149 atomic_t rd_atomic;
150 int wait_fence;
151 int need_rd_atomic;
152 int wait_psn;
153 int need_retry;
154 int noack_pkts;
155 struct rxe_task task;
158 struct rxe_comp_info {
159 u32 psn;
160 int opcode;
161 int timeout;
162 int timeout_retry;
163 u32 retry_cnt;
164 u32 rnr_retry;
165 struct rxe_task task;
168 enum rdatm_res_state {
169 rdatm_res_state_next,
170 rdatm_res_state_new,
171 rdatm_res_state_replay,
174 struct resp_res {
175 int type;
176 u32 first_psn;
177 u32 last_psn;
178 u32 cur_psn;
179 enum rdatm_res_state state;
181 union {
182 struct {
183 struct sk_buff *skb;
184 } atomic;
185 struct {
186 struct rxe_mem *mr;
187 u64 va_org;
188 u32 rkey;
189 u32 length;
190 u64 va;
191 u32 resid;
192 } read;
196 struct rxe_resp_info {
197 enum rxe_qp_state state;
198 u32 msn;
199 u32 psn;
200 int opcode;
201 int drop_msg;
202 int goto_error;
203 int sent_psn_nak;
204 enum ib_wc_status status;
205 u8 aeth_syndrome;
207 /* Receive only */
208 struct rxe_recv_wqe *wqe;
210 /* RDMA read / atomic only */
211 u64 va;
212 struct rxe_mem *mr;
213 u32 resid;
214 u32 rkey;
215 u64 atomic_orig;
217 /* SRQ only */
218 struct {
219 struct rxe_recv_wqe wqe;
220 struct ib_sge sge[RXE_MAX_SGE];
221 } srq_wqe;
223 /* Responder resources. It's a circular list where the oldest
224 * resource is dropped first.
226 struct resp_res *resources;
227 unsigned int res_head;
228 unsigned int res_tail;
229 struct resp_res *res;
230 struct rxe_task task;
233 struct rxe_qp {
234 struct rxe_pool_entry pelem;
235 struct ib_qp ibqp;
236 struct ib_qp_attr attr;
237 unsigned int valid;
238 unsigned int mtu;
239 int is_user;
241 struct rxe_pd *pd;
242 struct rxe_srq *srq;
243 struct rxe_cq *scq;
244 struct rxe_cq *rcq;
246 enum ib_sig_type sq_sig_type;
248 struct rxe_sq sq;
249 struct rxe_rq rq;
251 struct socket *sk;
252 u32 dst_cookie;
254 struct rxe_av pri_av;
255 struct rxe_av alt_av;
257 /* list of mcast groups qp has joined (for cleanup) */
258 struct list_head grp_list;
259 spinlock_t grp_lock; /* guard grp_list */
261 struct sk_buff_head req_pkts;
262 struct sk_buff_head resp_pkts;
263 struct sk_buff_head send_pkts;
265 struct rxe_req_info req;
266 struct rxe_comp_info comp;
267 struct rxe_resp_info resp;
269 atomic_t ssn;
270 atomic_t skb_out;
271 int need_req_skb;
273 /* Timer for retranmitting packet when ACKs have been lost. RC
274 * only. The requester sets it when it is not already
275 * started. The responder resets it whenever an ack is
276 * received.
278 struct timer_list retrans_timer;
279 u64 qp_timeout_jiffies;
281 /* Timer for handling RNR NAKS. */
282 struct timer_list rnr_nak_timer;
284 spinlock_t state_lock; /* guard requester and completer */
286 struct execute_work cleanup_work;
289 enum rxe_mem_state {
290 RXE_MEM_STATE_ZOMBIE,
291 RXE_MEM_STATE_INVALID,
292 RXE_MEM_STATE_FREE,
293 RXE_MEM_STATE_VALID,
296 enum rxe_mem_type {
297 RXE_MEM_TYPE_NONE,
298 RXE_MEM_TYPE_DMA,
299 RXE_MEM_TYPE_MR,
300 RXE_MEM_TYPE_FMR,
301 RXE_MEM_TYPE_MW,
304 #define RXE_BUF_PER_MAP (PAGE_SIZE / sizeof(struct rxe_phys_buf))
306 struct rxe_phys_buf {
307 u64 addr;
308 u64 size;
311 struct rxe_map {
312 struct rxe_phys_buf buf[RXE_BUF_PER_MAP];
315 struct rxe_mem {
316 struct rxe_pool_entry pelem;
317 union {
318 struct ib_mr ibmr;
319 struct ib_mw ibmw;
322 struct rxe_pd *pd;
323 struct ib_umem *umem;
325 u32 lkey;
326 u32 rkey;
328 enum rxe_mem_state state;
329 enum rxe_mem_type type;
330 u64 va;
331 u64 iova;
332 size_t length;
333 u32 offset;
334 int access;
336 int page_shift;
337 int page_mask;
338 int map_shift;
339 int map_mask;
341 u32 num_buf;
342 u32 nbuf;
344 u32 max_buf;
345 u32 num_map;
347 struct rxe_map **map;
350 struct rxe_mc_grp {
351 struct rxe_pool_entry pelem;
352 spinlock_t mcg_lock; /* guard group */
353 struct rxe_dev *rxe;
354 struct list_head qp_list;
355 union ib_gid mgid;
356 int num_qp;
357 u32 qkey;
358 u16 pkey;
361 struct rxe_mc_elem {
362 struct rxe_pool_entry pelem;
363 struct list_head qp_list;
364 struct list_head grp_list;
365 struct rxe_qp *qp;
366 struct rxe_mc_grp *grp;
369 struct rxe_port {
370 struct ib_port_attr attr;
371 u16 *pkey_tbl;
372 __be64 port_guid;
373 __be64 subnet_prefix;
374 spinlock_t port_lock; /* guard port */
375 unsigned int mtu_cap;
376 /* special QPs */
377 u32 qp_smi_index;
378 u32 qp_gsi_index;
381 struct rxe_dev {
382 struct ib_device ib_dev;
383 struct ib_device_attr attr;
384 int max_ucontext;
385 int max_inline_data;
386 struct kref ref_cnt;
387 struct mutex usdev_lock;
389 struct net_device *ndev;
391 int xmit_errors;
393 struct rxe_pool uc_pool;
394 struct rxe_pool pd_pool;
395 struct rxe_pool ah_pool;
396 struct rxe_pool srq_pool;
397 struct rxe_pool qp_pool;
398 struct rxe_pool cq_pool;
399 struct rxe_pool mr_pool;
400 struct rxe_pool mw_pool;
401 struct rxe_pool mc_grp_pool;
402 struct rxe_pool mc_elem_pool;
404 spinlock_t pending_lock; /* guard pending_mmaps */
405 struct list_head pending_mmaps;
407 spinlock_t mmap_offset_lock; /* guard mmap_offset */
408 int mmap_offset;
410 u64 stats_counters[RXE_NUM_OF_COUNTERS];
412 struct rxe_port port;
413 struct list_head list;
414 struct crypto_shash *tfm;
417 static inline void rxe_counter_inc(struct rxe_dev *rxe, enum rxe_counters cnt)
419 rxe->stats_counters[cnt]++;
422 static inline struct rxe_dev *to_rdev(struct ib_device *dev)
424 return dev ? container_of(dev, struct rxe_dev, ib_dev) : NULL;
427 static inline struct rxe_ucontext *to_ruc(struct ib_ucontext *uc)
429 return uc ? container_of(uc, struct rxe_ucontext, ibuc) : NULL;
432 static inline struct rxe_pd *to_rpd(struct ib_pd *pd)
434 return pd ? container_of(pd, struct rxe_pd, ibpd) : NULL;
437 static inline struct rxe_ah *to_rah(struct ib_ah *ah)
439 return ah ? container_of(ah, struct rxe_ah, ibah) : NULL;
442 static inline struct rxe_srq *to_rsrq(struct ib_srq *srq)
444 return srq ? container_of(srq, struct rxe_srq, ibsrq) : NULL;
447 static inline struct rxe_qp *to_rqp(struct ib_qp *qp)
449 return qp ? container_of(qp, struct rxe_qp, ibqp) : NULL;
452 static inline struct rxe_cq *to_rcq(struct ib_cq *cq)
454 return cq ? container_of(cq, struct rxe_cq, ibcq) : NULL;
457 static inline struct rxe_mem *to_rmr(struct ib_mr *mr)
459 return mr ? container_of(mr, struct rxe_mem, ibmr) : NULL;
462 static inline struct rxe_mem *to_rmw(struct ib_mw *mw)
464 return mw ? container_of(mw, struct rxe_mem, ibmw) : NULL;
467 int rxe_register_device(struct rxe_dev *rxe);
468 int rxe_unregister_device(struct rxe_dev *rxe);
470 void rxe_mc_cleanup(struct rxe_pool_entry *arg);
472 #endif /* RXE_VERBS_H */