1 /*
2 * Copyright(c) 2015 - 2017 Intel Corporation.
3 *
4 * This file is provided under a dual BSD/GPLv2 license. When using or
5 * redistributing this file, you may do so under either license.
6 *
7 * GPL LICENSE SUMMARY
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of version 2 of the GNU General Public License as
11 * published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * BSD LICENSE
19 *
20 * Redistribution and use in source and binary forms, with or without
21 * modification, are permitted provided that the following conditions
22 * are met:
23 *
24 * - Redistributions of source code must retain the above copyright
25 * notice, this list of conditions and the following disclaimer.
26 * - Redistributions in binary form must reproduce the above copyright
27 * notice, this list of conditions and the following disclaimer in
28 * the documentation and/or other materials provided with the
29 * distribution.
30 * - Neither the name of Intel Corporation nor the names of its
31 * contributors may be used to endorse or promote products derived
32 * from this software without specific prior written permission.
33 *
34 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
35 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
36 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
37 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
38 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
39 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
40 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
41 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
42 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
43 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
44 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
45 *
46 */
47
48 #ifndef HFI1_VERBS_H
49 #define HFI1_VERBS_H
50
51 #include <linux/types.h>
52 #include <linux/seqlock.h>
53 #include <linux/kernel.h>
54 #include <linux/interrupt.h>
55 #include <linux/kref.h>
56 #include <linux/workqueue.h>
57 #include <linux/kthread.h>
58 #include <linux/completion.h>
59 #include <linux/slab.h>
60 #include <rdma/ib_pack.h>
61 #include <rdma/ib_user_verbs.h>
62 #include <rdma/ib_mad.h>
63 #include <rdma/ib_hdrs.h>
64 #include <rdma/rdma_vt.h>
65 #include <rdma/rdmavt_qp.h>
66 #include <rdma/rdmavt_cq.h>
67
68 struct hfi1_ctxtdata;
69 struct hfi1_pportdata;
70 struct hfi1_devdata;
71 struct hfi1_packet;
72
73 #include "iowait.h"
74
75 #define HFI1_MAX_RDMA_ATOMIC 16
76
77 /*
78 * Increment this value if any changes that break userspace ABI
79 * compatibility are made.
80 */
81 #define HFI1_UVERBS_ABI_VERSION 2
82
83 /* IB Performance Manager status values */
84 #define IB_PMA_SAMPLE_STATUS_DONE 0x00
85 #define IB_PMA_SAMPLE_STATUS_STARTED 0x01
86 #define IB_PMA_SAMPLE_STATUS_RUNNING 0x02
87
88 /* Mandatory IB performance counter select values. */
89 #define IB_PMA_PORT_XMIT_DATA cpu_to_be16(0x0001)
90 #define IB_PMA_PORT_RCV_DATA cpu_to_be16(0x0002)
91 #define IB_PMA_PORT_XMIT_PKTS cpu_to_be16(0x0003)
92 #define IB_PMA_PORT_RCV_PKTS cpu_to_be16(0x0004)
93 #define IB_PMA_PORT_XMIT_WAIT cpu_to_be16(0x0005)
94
95 #define HFI1_VENDOR_IPG cpu_to_be16(0xFFA0)
96
97 #define IB_DEFAULT_GID_PREFIX cpu_to_be64(0xfe80000000000000ULL)
98 #define OPA_BTH_MIG_REQ BIT(31)
99
100 #define RC_OP(x) IB_OPCODE_RC_##x
101 #define UC_OP(x) IB_OPCODE_UC_##x
102
103 /* flags passed by hfi1_ib_rcv() */
104 enum {
105 HFI1_HAS_GRH = (1 << 0),
106 };
107
108 struct hfi1_16b_header {
109 u32 lrh[4];
110 union {
111 struct {
112 struct ib_grh grh;
113 struct ib_other_headers oth;
114 } l;
115 struct ib_other_headers oth;
116 } u;
117 } __packed;
118
119 struct hfi1_opa_header {
120 union {
121 struct ib_header ibh; /* 9B header */
122 struct hfi1_16b_header opah; /* 16B header */
123 };
124 u8 hdr_type; /* 9B or 16B */
125 } __packed;
126
127 struct hfi1_ahg_info {
128 u32 ahgdesc[2];
129 u16 tx_flags;
130 u8 ahgcount;
131 u8 ahgidx;
132 };
133
134 struct hfi1_sdma_header {
135 __le64 pbc;
136 struct hfi1_opa_header hdr;
137 } __packed;
138
139 /*
140 * hfi1 specific data structures that will be hidden from rvt after the queue
141 * pair is made common
142 */
143 struct hfi1_qp_priv {
144 struct hfi1_ahg_info *s_ahg; /* ahg info for next header */
145 struct sdma_engine *s_sde; /* current sde */
146 struct send_context *s_sendcontext; /* current sendcontext */
147 u8 s_sc; /* SC[0..4] for next packet */
148 struct iowait s_iowait;
149 struct rvt_qp *owner;
150 u8 hdr_type; /* 9B or 16B */
151 };
152
153 /*
154 * This structure is used to hold commonly lookedup and computed values during
155 * the send engine progress.
156 */
157 struct hfi1_pkt_state {
158 struct hfi1_ibdev *dev;
159 struct hfi1_ibport *ibp;
160 struct hfi1_pportdata *ppd;
161 struct verbs_txreq *s_txreq;
162 unsigned long flags;
163 unsigned long timeout;
164 unsigned long timeout_int;
165 int cpu;
166 u8 opcode;
167 bool in_thread;
168 bool pkts_sent;
169 };
170
171 #define HFI1_PSN_CREDIT 16
172
173 struct hfi1_opcode_stats {
174 u64 n_packets; /* number of packets */
175 u64 n_bytes; /* total number of bytes */
176 };
177
178 struct hfi1_opcode_stats_perctx {
179 struct hfi1_opcode_stats stats[256];
180 };
181
inc_opstats(u32 tlen,struct hfi1_opcode_stats * stats)182 static inline void inc_opstats(
183 u32 tlen,
184 struct hfi1_opcode_stats *stats)
185 {
186 #ifdef CONFIG_DEBUG_FS
187 stats->n_bytes += tlen;
188 stats->n_packets++;
189 #endif
190 }
191
192 struct hfi1_ibport {
193 struct rvt_qp __rcu *qp[2];
194 struct rvt_ibport rvp;
195
196 /* the first 16 entries are sl_to_vl for !OPA */
197 u8 sl_to_sc[32];
198 u8 sc_to_sl[32];
199 };
200
201 struct hfi1_ibdev {
202 struct rvt_dev_info rdi; /* Must be first */
203
204 /* QP numbers are shared by all IB ports */
205 /* protect txwait list */
206 seqlock_t txwait_lock ____cacheline_aligned_in_smp;
207 struct list_head txwait; /* list for wait verbs_txreq */
208 struct list_head memwait; /* list for wait kernel memory */
209 struct kmem_cache *verbs_txreq_cache;
210 u64 n_txwait;
211 u64 n_kmem_wait;
212
213 /* protect iowait lists */
214 seqlock_t iowait_lock ____cacheline_aligned_in_smp;
215 u64 n_piowait;
216 u64 n_piodrain;
217 struct timer_list mem_timer;
218
219 #ifdef CONFIG_DEBUG_FS
220 /* per HFI debugfs */
221 struct dentry *hfi1_ibdev_dbg;
222 /* per HFI symlinks to above */
223 struct dentry *hfi1_ibdev_link;
224 #ifdef CONFIG_FAULT_INJECTION
225 struct fault_opcode *fault_opcode;
226 struct fault_packet *fault_packet;
227 bool fault_suppress_err;
228 #endif
229 #endif
230 };
231
to_idev(struct ib_device * ibdev)232 static inline struct hfi1_ibdev *to_idev(struct ib_device *ibdev)
233 {
234 struct rvt_dev_info *rdi;
235
236 rdi = container_of(ibdev, struct rvt_dev_info, ibdev);
237 return container_of(rdi, struct hfi1_ibdev, rdi);
238 }
239
iowait_to_qp(struct iowait * s_iowait)240 static inline struct rvt_qp *iowait_to_qp(struct iowait *s_iowait)
241 {
242 struct hfi1_qp_priv *priv;
243
244 priv = container_of(s_iowait, struct hfi1_qp_priv, s_iowait);
245 return priv->owner;
246 }
247
248 /*
249 * Send if not busy or waiting for I/O and either
250 * a RC response is pending or we can process send work requests.
251 */
hfi1_send_ok(struct rvt_qp * qp)252 static inline int hfi1_send_ok(struct rvt_qp *qp)
253 {
254 return !(qp->s_flags & (RVT_S_BUSY | RVT_S_ANY_WAIT_IO)) &&
255 (qp->s_hdrwords || (qp->s_flags & RVT_S_RESP_PENDING) ||
256 !(qp->s_flags & RVT_S_ANY_WAIT_SEND));
257 }
258
259 /*
260 * This must be called with s_lock held.
261 */
262 void hfi1_bad_pkey(struct hfi1_ibport *ibp, u32 key, u32 sl,
263 u32 qp1, u32 qp2, u32 lid1, u32 lid2);
264 void hfi1_cap_mask_chg(struct rvt_dev_info *rdi, u8 port_num);
265 void hfi1_sys_guid_chg(struct hfi1_ibport *ibp);
266 void hfi1_node_desc_chg(struct hfi1_ibport *ibp);
267 int hfi1_process_mad(struct ib_device *ibdev, int mad_flags, u8 port,
268 const struct ib_wc *in_wc, const struct ib_grh *in_grh,
269 const struct ib_mad_hdr *in_mad, size_t in_mad_size,
270 struct ib_mad_hdr *out_mad, size_t *out_mad_size,
271 u16 *out_mad_pkey_index);
272
273 /*
274 * The PSN_MASK and PSN_SHIFT allow for
275 * 1) comparing two PSNs
276 * 2) returning the PSN with any upper bits masked
277 * 3) returning the difference between to PSNs
278 *
279 * The number of significant bits in the PSN must
280 * necessarily be at least one bit less than
281 * the container holding the PSN.
282 */
283 #define PSN_MASK 0x7FFFFFFF
284 #define PSN_SHIFT 1
285 #define PSN_MODIFY_MASK 0xFFFFFF
286
287 /*
288 * Compare two PSNs
289 * Returns an integer <, ==, or > than zero.
290 */
cmp_psn(u32 a,u32 b)291 static inline int cmp_psn(u32 a, u32 b)
292 {
293 return (((int)a) - ((int)b)) << PSN_SHIFT;
294 }
295
296 /*
297 * Return masked PSN
298 */
mask_psn(u32 a)299 static inline u32 mask_psn(u32 a)
300 {
301 return a & PSN_MASK;
302 }
303
304 /*
305 * Return delta between two PSNs
306 */
delta_psn(u32 a,u32 b)307 static inline u32 delta_psn(u32 a, u32 b)
308 {
309 return (((int)a - (int)b) << PSN_SHIFT) >> PSN_SHIFT;
310 }
311
312 struct verbs_txreq;
313 void hfi1_put_txreq(struct verbs_txreq *tx);
314
315 int hfi1_verbs_send(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
316
317 void hfi1_copy_sge(struct rvt_sge_state *ss, void *data, u32 length,
318 bool release, bool copy_last);
319
320 void hfi1_cnp_rcv(struct hfi1_packet *packet);
321
322 void hfi1_uc_rcv(struct hfi1_packet *packet);
323
324 void hfi1_rc_rcv(struct hfi1_packet *packet);
325
326 void hfi1_rc_hdrerr(
327 struct hfi1_ctxtdata *rcd,
328 struct hfi1_packet *packet,
329 struct rvt_qp *qp);
330
331 u8 ah_to_sc(struct ib_device *ibdev, struct rdma_ah_attr *ah_attr);
332
333 void hfi1_rc_send_complete(struct rvt_qp *qp, struct hfi1_opa_header *opah);
334
335 void hfi1_ud_rcv(struct hfi1_packet *packet);
336
337 int hfi1_lookup_pkey_idx(struct hfi1_ibport *ibp, u16 pkey);
338
339 int hfi1_rvt_get_rwqe(struct rvt_qp *qp, int wr_id_only);
340
341 void hfi1_migrate_qp(struct rvt_qp *qp);
342
343 int hfi1_check_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr,
344 int attr_mask, struct ib_udata *udata);
345
346 void hfi1_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr,
347 int attr_mask, struct ib_udata *udata);
348 void hfi1_restart_rc(struct rvt_qp *qp, u32 psn, int wait);
349 int hfi1_check_send_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe);
350
351 extern const u32 rc_only_opcode;
352 extern const u32 uc_only_opcode;
353
354 int hfi1_ruc_check_hdr(struct hfi1_ibport *ibp, struct hfi1_packet *packet);
355
356 u32 hfi1_make_grh(struct hfi1_ibport *ibp, struct ib_grh *hdr,
357 const struct ib_global_route *grh, u32 hwords, u32 nwords);
358
359 void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr,
360 u32 bth0, u32 bth2, int middle,
361 struct hfi1_pkt_state *ps);
362
363 void _hfi1_do_send(struct work_struct *work);
364
365 void hfi1_do_send_from_rvt(struct rvt_qp *qp);
366
367 void hfi1_do_send(struct rvt_qp *qp, bool in_thread);
368
369 void hfi1_send_complete(struct rvt_qp *qp, struct rvt_swqe *wqe,
370 enum ib_wc_status status);
371
372 void hfi1_send_rc_ack(struct hfi1_ctxtdata *rcd, struct rvt_qp *qp,
373 bool is_fecn);
374
375 int hfi1_make_rc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
376
377 int hfi1_make_uc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
378
379 int hfi1_make_ud_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
380
381 int hfi1_register_ib_device(struct hfi1_devdata *);
382
383 void hfi1_unregister_ib_device(struct hfi1_devdata *);
384
385 void hfi1_ib_rcv(struct hfi1_packet *packet);
386
387 void hfi1_16B_rcv(struct hfi1_packet *packet);
388
389 unsigned hfi1_get_npkeys(struct hfi1_devdata *);
390
391 int hfi1_verbs_send_dma(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
392 u64 pbc);
393
394 int hfi1_verbs_send_pio(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
395 u64 pbc);
396
397 int hfi1_wss_init(void);
398 void hfi1_wss_exit(void);
399
400 /* platform specific: return the lowest level cache (llc) size, in KiB */
wss_llc_size(void)401 static inline int wss_llc_size(void)
402 {
403 /* assume that the boot CPU value is universal for all CPUs */
404 return boot_cpu_data.x86_cache_size;
405 }
406
407 /* platform specific: cacheless copy */
cacheless_memcpy(void * dst,void * src,size_t n)408 static inline void cacheless_memcpy(void *dst, void *src, size_t n)
409 {
410 /*
411 * Use the only available X64 cacheless copy. Add a __user cast
412 * to quiet sparse. The src agument is already in the kernel so
413 * there are no security issues. The extra fault recovery machinery
414 * is not invoked.
415 */
416 __copy_user_nocache(dst, (void __user *)src, n, 0);
417 }
418
419 extern const enum ib_wc_opcode ib_hfi1_wc_opcode[];
420
421 extern const u8 hdr_len_by_opcode[];
422
423 extern const int ib_rvt_state_ops[];
424
425 extern __be64 ib_hfi1_sys_image_guid; /* in network order */
426
427 extern unsigned int hfi1_max_cqes;
428
429 extern unsigned int hfi1_max_cqs;
430
431 extern unsigned int hfi1_max_qp_wrs;
432
433 extern unsigned int hfi1_max_qps;
434
435 extern unsigned int hfi1_max_sges;
436
437 extern unsigned int hfi1_max_mcast_grps;
438
439 extern unsigned int hfi1_max_mcast_qp_attached;
440
441 extern unsigned int hfi1_max_srqs;
442
443 extern unsigned int hfi1_max_srq_sges;
444
445 extern unsigned int hfi1_max_srq_wrs;
446
447 extern unsigned short piothreshold;
448
449 extern const u32 ib_hfi1_rnr_table[];
450
451 #endif /* HFI1_VERBS_H */
452