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1// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2/*
3 * Copyright(c) 2015 - 2020 Intel Corporation.
4 */
5
6#include <rdma/ib_mad.h>
7#include <rdma/ib_user_verbs.h>
8#include <linux/io.h>
9#include <linux/module.h>
10#include <linux/utsname.h>
11#include <linux/rculist.h>
12#include <linux/mm.h>
13#include <linux/vmalloc.h>
14#include <rdma/opa_addr.h>
15#include <linux/nospec.h>
16
17#include "hfi.h"
18#include "common.h"
19#include "device.h"
20#include "trace.h"
21#include "qp.h"
22#include "verbs_txreq.h"
23#include "debugfs.h"
24#include "vnic.h"
25#include "fault.h"
26#include "affinity.h"
27#include "ipoib.h"
28
29static unsigned int hfi1_lkey_table_size = 16;
30module_param_named(lkey_table_size, hfi1_lkey_table_size, uint,
31 S_IRUGO);
32MODULE_PARM_DESC(lkey_table_size,
33 "LKEY table size in bits (2^n, 1 <= n <= 23)");
34
35static unsigned int hfi1_max_pds = 0xFFFF;
36module_param_named(max_pds, hfi1_max_pds, uint, S_IRUGO);
37MODULE_PARM_DESC(max_pds,
38 "Maximum number of protection domains to support");
39
40static unsigned int hfi1_max_ahs = 0xFFFF;
41module_param_named(max_ahs, hfi1_max_ahs, uint, S_IRUGO);
42MODULE_PARM_DESC(max_ahs, "Maximum number of address handles to support");
43
44unsigned int hfi1_max_cqes = 0x2FFFFF;
45module_param_named(max_cqes, hfi1_max_cqes, uint, S_IRUGO);
46MODULE_PARM_DESC(max_cqes,
47 "Maximum number of completion queue entries to support");
48
49unsigned int hfi1_max_cqs = 0x1FFFF;
50module_param_named(max_cqs, hfi1_max_cqs, uint, S_IRUGO);
51MODULE_PARM_DESC(max_cqs, "Maximum number of completion queues to support");
52
53unsigned int hfi1_max_qp_wrs = 0x3FFF;
54module_param_named(max_qp_wrs, hfi1_max_qp_wrs, uint, S_IRUGO);
55MODULE_PARM_DESC(max_qp_wrs, "Maximum number of QP WRs to support");
56
57unsigned int hfi1_max_qps = 32768;
58module_param_named(max_qps, hfi1_max_qps, uint, S_IRUGO);
59MODULE_PARM_DESC(max_qps, "Maximum number of QPs to support");
60
61unsigned int hfi1_max_sges = 0x60;
62module_param_named(max_sges, hfi1_max_sges, uint, S_IRUGO);
63MODULE_PARM_DESC(max_sges, "Maximum number of SGEs to support");
64
65unsigned int hfi1_max_mcast_grps = 16384;
66module_param_named(max_mcast_grps, hfi1_max_mcast_grps, uint, S_IRUGO);
67MODULE_PARM_DESC(max_mcast_grps,
68 "Maximum number of multicast groups to support");
69
70unsigned int hfi1_max_mcast_qp_attached = 16;
71module_param_named(max_mcast_qp_attached, hfi1_max_mcast_qp_attached,
72 uint, S_IRUGO);
73MODULE_PARM_DESC(max_mcast_qp_attached,
74 "Maximum number of attached QPs to support");
75
76unsigned int hfi1_max_srqs = 1024;
77module_param_named(max_srqs, hfi1_max_srqs, uint, S_IRUGO);
78MODULE_PARM_DESC(max_srqs, "Maximum number of SRQs to support");
79
80unsigned int hfi1_max_srq_sges = 128;
81module_param_named(max_srq_sges, hfi1_max_srq_sges, uint, S_IRUGO);
82MODULE_PARM_DESC(max_srq_sges, "Maximum number of SRQ SGEs to support");
83
84unsigned int hfi1_max_srq_wrs = 0x1FFFF;
85module_param_named(max_srq_wrs, hfi1_max_srq_wrs, uint, S_IRUGO);
86MODULE_PARM_DESC(max_srq_wrs, "Maximum number of SRQ WRs support");
87
88unsigned short piothreshold = 256;
89module_param(piothreshold, ushort, S_IRUGO);
90MODULE_PARM_DESC(piothreshold, "size used to determine sdma vs. pio");
91
92static unsigned int sge_copy_mode;
93module_param(sge_copy_mode, uint, S_IRUGO);
94MODULE_PARM_DESC(sge_copy_mode,
95 "Verbs copy mode: 0 use memcpy, 1 use cacheless copy, 2 adapt based on WSS");
96
97static void verbs_sdma_complete(
98 struct sdma_txreq *cookie,
99 int status);
100
101static int pio_wait(struct rvt_qp *qp,
102 struct send_context *sc,
103 struct hfi1_pkt_state *ps,
104 u32 flag);
105
106/* Length of buffer to create verbs txreq cache name */
107#define TXREQ_NAME_LEN 24
108
109static uint wss_threshold = 80;
110module_param(wss_threshold, uint, S_IRUGO);
111MODULE_PARM_DESC(wss_threshold, "Percentage (1-100) of LLC to use as a threshold for a cacheless copy");
112static uint wss_clean_period = 256;
113module_param(wss_clean_period, uint, S_IRUGO);
114MODULE_PARM_DESC(wss_clean_period, "Count of verbs copies before an entry in the page copy table is cleaned");
115
116/*
117 * Translate ib_wr_opcode into ib_wc_opcode.
118 */
119const enum ib_wc_opcode ib_hfi1_wc_opcode[] = {
120 [IB_WR_RDMA_WRITE] = IB_WC_RDMA_WRITE,
121 [IB_WR_TID_RDMA_WRITE] = IB_WC_RDMA_WRITE,
122 [IB_WR_RDMA_WRITE_WITH_IMM] = IB_WC_RDMA_WRITE,
123 [IB_WR_SEND] = IB_WC_SEND,
124 [IB_WR_SEND_WITH_IMM] = IB_WC_SEND,
125 [IB_WR_RDMA_READ] = IB_WC_RDMA_READ,
126 [IB_WR_TID_RDMA_READ] = IB_WC_RDMA_READ,
127 [IB_WR_ATOMIC_CMP_AND_SWP] = IB_WC_COMP_SWAP,
128 [IB_WR_ATOMIC_FETCH_AND_ADD] = IB_WC_FETCH_ADD,
129 [IB_WR_SEND_WITH_INV] = IB_WC_SEND,
130 [IB_WR_LOCAL_INV] = IB_WC_LOCAL_INV,
131 [IB_WR_REG_MR] = IB_WC_REG_MR
132};
133
134/*
135 * Length of header by opcode, 0 --> not supported
136 */
137const u8 hdr_len_by_opcode[256] = {
138 /* RC */
139 [IB_OPCODE_RC_SEND_FIRST] = 12 + 8,
140 [IB_OPCODE_RC_SEND_MIDDLE] = 12 + 8,
141 [IB_OPCODE_RC_SEND_LAST] = 12 + 8,
142 [IB_OPCODE_RC_SEND_LAST_WITH_IMMEDIATE] = 12 + 8 + 4,
143 [IB_OPCODE_RC_SEND_ONLY] = 12 + 8,
144 [IB_OPCODE_RC_SEND_ONLY_WITH_IMMEDIATE] = 12 + 8 + 4,
145 [IB_OPCODE_RC_RDMA_WRITE_FIRST] = 12 + 8 + 16,
146 [IB_OPCODE_RC_RDMA_WRITE_MIDDLE] = 12 + 8,
147 [IB_OPCODE_RC_RDMA_WRITE_LAST] = 12 + 8,
148 [IB_OPCODE_RC_RDMA_WRITE_LAST_WITH_IMMEDIATE] = 12 + 8 + 4,
149 [IB_OPCODE_RC_RDMA_WRITE_ONLY] = 12 + 8 + 16,
150 [IB_OPCODE_RC_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = 12 + 8 + 20,
151 [IB_OPCODE_RC_RDMA_READ_REQUEST] = 12 + 8 + 16,
152 [IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST] = 12 + 8 + 4,
153 [IB_OPCODE_RC_RDMA_READ_RESPONSE_MIDDLE] = 12 + 8,
154 [IB_OPCODE_RC_RDMA_READ_RESPONSE_LAST] = 12 + 8 + 4,
155 [IB_OPCODE_RC_RDMA_READ_RESPONSE_ONLY] = 12 + 8 + 4,
156 [IB_OPCODE_RC_ACKNOWLEDGE] = 12 + 8 + 4,
157 [IB_OPCODE_RC_ATOMIC_ACKNOWLEDGE] = 12 + 8 + 4 + 8,
158 [IB_OPCODE_RC_COMPARE_SWAP] = 12 + 8 + 28,
159 [IB_OPCODE_RC_FETCH_ADD] = 12 + 8 + 28,
160 [IB_OPCODE_RC_SEND_LAST_WITH_INVALIDATE] = 12 + 8 + 4,
161 [IB_OPCODE_RC_SEND_ONLY_WITH_INVALIDATE] = 12 + 8 + 4,
162 [IB_OPCODE_TID_RDMA_READ_REQ] = 12 + 8 + 36,
163 [IB_OPCODE_TID_RDMA_READ_RESP] = 12 + 8 + 36,
164 [IB_OPCODE_TID_RDMA_WRITE_REQ] = 12 + 8 + 36,
165 [IB_OPCODE_TID_RDMA_WRITE_RESP] = 12 + 8 + 36,
166 [IB_OPCODE_TID_RDMA_WRITE_DATA] = 12 + 8 + 36,
167 [IB_OPCODE_TID_RDMA_WRITE_DATA_LAST] = 12 + 8 + 36,
168 [IB_OPCODE_TID_RDMA_ACK] = 12 + 8 + 36,
169 [IB_OPCODE_TID_RDMA_RESYNC] = 12 + 8 + 36,
170 /* UC */
171 [IB_OPCODE_UC_SEND_FIRST] = 12 + 8,
172 [IB_OPCODE_UC_SEND_MIDDLE] = 12 + 8,
173 [IB_OPCODE_UC_SEND_LAST] = 12 + 8,
174 [IB_OPCODE_UC_SEND_LAST_WITH_IMMEDIATE] = 12 + 8 + 4,
175 [IB_OPCODE_UC_SEND_ONLY] = 12 + 8,
176 [IB_OPCODE_UC_SEND_ONLY_WITH_IMMEDIATE] = 12 + 8 + 4,
177 [IB_OPCODE_UC_RDMA_WRITE_FIRST] = 12 + 8 + 16,
178 [IB_OPCODE_UC_RDMA_WRITE_MIDDLE] = 12 + 8,
179 [IB_OPCODE_UC_RDMA_WRITE_LAST] = 12 + 8,
180 [IB_OPCODE_UC_RDMA_WRITE_LAST_WITH_IMMEDIATE] = 12 + 8 + 4,
181 [IB_OPCODE_UC_RDMA_WRITE_ONLY] = 12 + 8 + 16,
182 [IB_OPCODE_UC_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = 12 + 8 + 20,
183 /* UD */
184 [IB_OPCODE_UD_SEND_ONLY] = 12 + 8 + 8,
185 [IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE] = 12 + 8 + 12
186};
187
188static const opcode_handler opcode_handler_tbl[256] = {
189 /* RC */
190 [IB_OPCODE_RC_SEND_FIRST] = &hfi1_rc_rcv,
191 [IB_OPCODE_RC_SEND_MIDDLE] = &hfi1_rc_rcv,
192 [IB_OPCODE_RC_SEND_LAST] = &hfi1_rc_rcv,
193 [IB_OPCODE_RC_SEND_LAST_WITH_IMMEDIATE] = &hfi1_rc_rcv,
194 [IB_OPCODE_RC_SEND_ONLY] = &hfi1_rc_rcv,
195 [IB_OPCODE_RC_SEND_ONLY_WITH_IMMEDIATE] = &hfi1_rc_rcv,
196 [IB_OPCODE_RC_RDMA_WRITE_FIRST] = &hfi1_rc_rcv,
197 [IB_OPCODE_RC_RDMA_WRITE_MIDDLE] = &hfi1_rc_rcv,
198 [IB_OPCODE_RC_RDMA_WRITE_LAST] = &hfi1_rc_rcv,
199 [IB_OPCODE_RC_RDMA_WRITE_LAST_WITH_IMMEDIATE] = &hfi1_rc_rcv,
200 [IB_OPCODE_RC_RDMA_WRITE_ONLY] = &hfi1_rc_rcv,
201 [IB_OPCODE_RC_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = &hfi1_rc_rcv,
202 [IB_OPCODE_RC_RDMA_READ_REQUEST] = &hfi1_rc_rcv,
203 [IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST] = &hfi1_rc_rcv,
204 [IB_OPCODE_RC_RDMA_READ_RESPONSE_MIDDLE] = &hfi1_rc_rcv,
205 [IB_OPCODE_RC_RDMA_READ_RESPONSE_LAST] = &hfi1_rc_rcv,
206 [IB_OPCODE_RC_RDMA_READ_RESPONSE_ONLY] = &hfi1_rc_rcv,
207 [IB_OPCODE_RC_ACKNOWLEDGE] = &hfi1_rc_rcv,
208 [IB_OPCODE_RC_ATOMIC_ACKNOWLEDGE] = &hfi1_rc_rcv,
209 [IB_OPCODE_RC_COMPARE_SWAP] = &hfi1_rc_rcv,
210 [IB_OPCODE_RC_FETCH_ADD] = &hfi1_rc_rcv,
211 [IB_OPCODE_RC_SEND_LAST_WITH_INVALIDATE] = &hfi1_rc_rcv,
212 [IB_OPCODE_RC_SEND_ONLY_WITH_INVALIDATE] = &hfi1_rc_rcv,
213
214 /* TID RDMA has separate handlers for different opcodes.*/
215 [IB_OPCODE_TID_RDMA_WRITE_REQ] = &hfi1_rc_rcv_tid_rdma_write_req,
216 [IB_OPCODE_TID_RDMA_WRITE_RESP] = &hfi1_rc_rcv_tid_rdma_write_resp,
217 [IB_OPCODE_TID_RDMA_WRITE_DATA] = &hfi1_rc_rcv_tid_rdma_write_data,
218 [IB_OPCODE_TID_RDMA_WRITE_DATA_LAST] = &hfi1_rc_rcv_tid_rdma_write_data,
219 [IB_OPCODE_TID_RDMA_READ_REQ] = &hfi1_rc_rcv_tid_rdma_read_req,
220 [IB_OPCODE_TID_RDMA_READ_RESP] = &hfi1_rc_rcv_tid_rdma_read_resp,
221 [IB_OPCODE_TID_RDMA_RESYNC] = &hfi1_rc_rcv_tid_rdma_resync,
222 [IB_OPCODE_TID_RDMA_ACK] = &hfi1_rc_rcv_tid_rdma_ack,
223
224 /* UC */
225 [IB_OPCODE_UC_SEND_FIRST] = &hfi1_uc_rcv,
226 [IB_OPCODE_UC_SEND_MIDDLE] = &hfi1_uc_rcv,
227 [IB_OPCODE_UC_SEND_LAST] = &hfi1_uc_rcv,
228 [IB_OPCODE_UC_SEND_LAST_WITH_IMMEDIATE] = &hfi1_uc_rcv,
229 [IB_OPCODE_UC_SEND_ONLY] = &hfi1_uc_rcv,
230 [IB_OPCODE_UC_SEND_ONLY_WITH_IMMEDIATE] = &hfi1_uc_rcv,
231 [IB_OPCODE_UC_RDMA_WRITE_FIRST] = &hfi1_uc_rcv,
232 [IB_OPCODE_UC_RDMA_WRITE_MIDDLE] = &hfi1_uc_rcv,
233 [IB_OPCODE_UC_RDMA_WRITE_LAST] = &hfi1_uc_rcv,
234 [IB_OPCODE_UC_RDMA_WRITE_LAST_WITH_IMMEDIATE] = &hfi1_uc_rcv,
235 [IB_OPCODE_UC_RDMA_WRITE_ONLY] = &hfi1_uc_rcv,
236 [IB_OPCODE_UC_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = &hfi1_uc_rcv,
237 /* UD */
238 [IB_OPCODE_UD_SEND_ONLY] = &hfi1_ud_rcv,
239 [IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE] = &hfi1_ud_rcv,
240 /* CNP */
241 [IB_OPCODE_CNP] = &hfi1_cnp_rcv
242};
243
244#define OPMASK 0x1f
245
246static const u32 pio_opmask[BIT(3)] = {
247 /* RC */
248 [IB_OPCODE_RC >> 5] =
249 BIT(RC_OP(SEND_ONLY) & OPMASK) |
250 BIT(RC_OP(SEND_ONLY_WITH_IMMEDIATE) & OPMASK) |
251 BIT(RC_OP(RDMA_WRITE_ONLY) & OPMASK) |
252 BIT(RC_OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE) & OPMASK) |
253 BIT(RC_OP(RDMA_READ_REQUEST) & OPMASK) |
254 BIT(RC_OP(ACKNOWLEDGE) & OPMASK) |
255 BIT(RC_OP(ATOMIC_ACKNOWLEDGE) & OPMASK) |
256 BIT(RC_OP(COMPARE_SWAP) & OPMASK) |
257 BIT(RC_OP(FETCH_ADD) & OPMASK),
258 /* UC */
259 [IB_OPCODE_UC >> 5] =
260 BIT(UC_OP(SEND_ONLY) & OPMASK) |
261 BIT(UC_OP(SEND_ONLY_WITH_IMMEDIATE) & OPMASK) |
262 BIT(UC_OP(RDMA_WRITE_ONLY) & OPMASK) |
263 BIT(UC_OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE) & OPMASK),
264};
265
266/*
267 * System image GUID.
268 */
269__be64 ib_hfi1_sys_image_guid;
270
271/*
272 * Make sure the QP is ready and able to accept the given opcode.
273 */
274static inline opcode_handler qp_ok(struct hfi1_packet *packet)
275{
276 if (!(ib_rvt_state_ops[packet->qp->state] & RVT_PROCESS_RECV_OK))
277 return NULL;
278 if (((packet->opcode & RVT_OPCODE_QP_MASK) ==
279 packet->qp->allowed_ops) ||
280 (packet->opcode == IB_OPCODE_CNP))
281 return opcode_handler_tbl[packet->opcode];
282
283 return NULL;
284}
285
286static u64 hfi1_fault_tx(struct rvt_qp *qp, u8 opcode, u64 pbc)
287{
288#ifdef CONFIG_FAULT_INJECTION
289 if ((opcode & IB_OPCODE_MSP) == IB_OPCODE_MSP) {
290 /*
291 * In order to drop non-IB traffic we
292 * set PbcInsertHrc to NONE (0x2).
293 * The packet will still be delivered
294 * to the receiving node but a
295 * KHdrHCRCErr (KDETH packet with a bad
296 * HCRC) will be triggered and the
297 * packet will not be delivered to the
298 * correct context.
299 */
300 pbc &= ~PBC_INSERT_HCRC_SMASK;
301 pbc |= (u64)PBC_IHCRC_NONE << PBC_INSERT_HCRC_SHIFT;
302 } else {
303 /*
304 * In order to drop regular verbs
305 * traffic we set the PbcTestEbp
306 * flag. The packet will still be
307 * delivered to the receiving node but
308 * a 'late ebp error' will be
309 * triggered and will be dropped.
310 */
311 pbc |= PBC_TEST_EBP;
312 }
313#endif
314 return pbc;
315}
316
317static opcode_handler tid_qp_ok(int opcode, struct hfi1_packet *packet)
318{
319 if (packet->qp->ibqp.qp_type != IB_QPT_RC ||
320 !(ib_rvt_state_ops[packet->qp->state] & RVT_PROCESS_RECV_OK))
321 return NULL;
322 if ((opcode & RVT_OPCODE_QP_MASK) == IB_OPCODE_TID_RDMA)
323 return opcode_handler_tbl[opcode];
324 return NULL;
325}
326
327void hfi1_kdeth_eager_rcv(struct hfi1_packet *packet)
328{
329 struct hfi1_ctxtdata *rcd = packet->rcd;
330 struct ib_header *hdr = packet->hdr;
331 u32 tlen = packet->tlen;
332 struct hfi1_pportdata *ppd = rcd->ppd;
333 struct hfi1_ibport *ibp = &ppd->ibport_data;
334 struct rvt_dev_info *rdi = &ppd->dd->verbs_dev.rdi;
335 opcode_handler opcode_handler;
336 unsigned long flags;
337 u32 qp_num;
338 int lnh;
339 u8 opcode;
340
341 /* DW == LRH (2) + BTH (3) + KDETH (9) + CRC (1) */
342 if (unlikely(tlen < 15 * sizeof(u32)))
343 goto drop;
344
345 lnh = be16_to_cpu(hdr->lrh[0]) & 3;
346 if (lnh != HFI1_LRH_BTH)
347 goto drop;
348
349 packet->ohdr = &hdr->u.oth;
350 trace_input_ibhdr(rcd->dd, packet, !!(rhf_dc_info(packet->rhf)));
351
352 opcode = (be32_to_cpu(packet->ohdr->bth[0]) >> 24);
353 inc_opstats(tlen, &rcd->opstats->stats[opcode]);
354
355 /* verbs_qp can be picked up from any tid_rdma header struct */
356 qp_num = be32_to_cpu(packet->ohdr->u.tid_rdma.r_req.verbs_qp) &
357 RVT_QPN_MASK;
358
359 rcu_read_lock();
360 packet->qp = rvt_lookup_qpn(rdi, &ibp->rvp, qp_num);
361 if (!packet->qp)
362 goto drop_rcu;
363 spin_lock_irqsave(&packet->qp->r_lock, flags);
364 opcode_handler = tid_qp_ok(opcode, packet);
365 if (likely(opcode_handler))
366 opcode_handler(packet);
367 else
368 goto drop_unlock;
369 spin_unlock_irqrestore(&packet->qp->r_lock, flags);
370 rcu_read_unlock();
371
372 return;
373drop_unlock:
374 spin_unlock_irqrestore(&packet->qp->r_lock, flags);
375drop_rcu:
376 rcu_read_unlock();
377drop:
378 ibp->rvp.n_pkt_drops++;
379}
380
381void hfi1_kdeth_expected_rcv(struct hfi1_packet *packet)
382{
383 struct hfi1_ctxtdata *rcd = packet->rcd;
384 struct ib_header *hdr = packet->hdr;
385 u32 tlen = packet->tlen;
386 struct hfi1_pportdata *ppd = rcd->ppd;
387 struct hfi1_ibport *ibp = &ppd->ibport_data;
388 struct rvt_dev_info *rdi = &ppd->dd->verbs_dev.rdi;
389 opcode_handler opcode_handler;
390 unsigned long flags;
391 u32 qp_num;
392 int lnh;
393 u8 opcode;
394
395 /* DW == LRH (2) + BTH (3) + KDETH (9) + CRC (1) */
396 if (unlikely(tlen < 15 * sizeof(u32)))
397 goto drop;
398
399 lnh = be16_to_cpu(hdr->lrh[0]) & 3;
400 if (lnh != HFI1_LRH_BTH)
401 goto drop;
402
403 packet->ohdr = &hdr->u.oth;
404 trace_input_ibhdr(rcd->dd, packet, !!(rhf_dc_info(packet->rhf)));
405
406 opcode = (be32_to_cpu(packet->ohdr->bth[0]) >> 24);
407 inc_opstats(tlen, &rcd->opstats->stats[opcode]);
408
409 /* verbs_qp can be picked up from any tid_rdma header struct */
410 qp_num = be32_to_cpu(packet->ohdr->u.tid_rdma.r_rsp.verbs_qp) &
411 RVT_QPN_MASK;
412
413 rcu_read_lock();
414 packet->qp = rvt_lookup_qpn(rdi, &ibp->rvp, qp_num);
415 if (!packet->qp)
416 goto drop_rcu;
417 spin_lock_irqsave(&packet->qp->r_lock, flags);
418 opcode_handler = tid_qp_ok(opcode, packet);
419 if (likely(opcode_handler))
420 opcode_handler(packet);
421 else
422 goto drop_unlock;
423 spin_unlock_irqrestore(&packet->qp->r_lock, flags);
424 rcu_read_unlock();
425
426 return;
427drop_unlock:
428 spin_unlock_irqrestore(&packet->qp->r_lock, flags);
429drop_rcu:
430 rcu_read_unlock();
431drop:
432 ibp->rvp.n_pkt_drops++;
433}
434
435static int hfi1_do_pkey_check(struct hfi1_packet *packet)
436{
437 struct hfi1_ctxtdata *rcd = packet->rcd;
438 struct hfi1_pportdata *ppd = rcd->ppd;
439 struct hfi1_16b_header *hdr = packet->hdr;
440 u16 pkey;
441
442 /* Pkey check needed only for bypass packets */
443 if (packet->etype != RHF_RCV_TYPE_BYPASS)
444 return 0;
445
446 /* Perform pkey check */
447 pkey = hfi1_16B_get_pkey(hdr);
448 return ingress_pkey_check(ppd, pkey, packet->sc,
449 packet->qp->s_pkey_index,
450 packet->slid, true);
451}
452
453static inline void hfi1_handle_packet(struct hfi1_packet *packet,
454 bool is_mcast)
455{
456 u32 qp_num;
457 struct hfi1_ctxtdata *rcd = packet->rcd;
458 struct hfi1_pportdata *ppd = rcd->ppd;
459 struct hfi1_ibport *ibp = rcd_to_iport(rcd);
460 struct rvt_dev_info *rdi = &ppd->dd->verbs_dev.rdi;
461 opcode_handler packet_handler;
462 unsigned long flags;
463
464 inc_opstats(packet->tlen, &rcd->opstats->stats[packet->opcode]);
465
466 if (unlikely(is_mcast)) {
467 struct rvt_mcast *mcast;
468 struct rvt_mcast_qp *p;
469
470 if (!packet->grh)
471 goto drop;
472 mcast = rvt_mcast_find(&ibp->rvp,
473 &packet->grh->dgid,
474 opa_get_lid(packet->dlid, 9B));
475 if (!mcast)
476 goto drop;
477 rcu_read_lock();
478 list_for_each_entry_rcu(p, &mcast->qp_list, list) {
479 packet->qp = p->qp;
480 if (hfi1_do_pkey_check(packet))
481 goto unlock_drop;
482 spin_lock_irqsave(&packet->qp->r_lock, flags);
483 packet_handler = qp_ok(packet);
484 if (likely(packet_handler))
485 packet_handler(packet);
486 else
487 ibp->rvp.n_pkt_drops++;
488 spin_unlock_irqrestore(&packet->qp->r_lock, flags);
489 }
490 rcu_read_unlock();
491 /*
492 * Notify rvt_multicast_detach() if it is waiting for us
493 * to finish.
494 */
495 if (atomic_dec_return(&mcast->refcount) <= 1)
496 wake_up(&mcast->wait);
497 } else {
498 /* Get the destination QP number. */
499 if (packet->etype == RHF_RCV_TYPE_BYPASS &&
500 hfi1_16B_get_l4(packet->hdr) == OPA_16B_L4_FM)
501 qp_num = hfi1_16B_get_dest_qpn(packet->mgmt);
502 else
503 qp_num = ib_bth_get_qpn(packet->ohdr);
504
505 rcu_read_lock();
506 packet->qp = rvt_lookup_qpn(rdi, &ibp->rvp, qp_num);
507 if (!packet->qp)
508 goto unlock_drop;
509
510 if (hfi1_do_pkey_check(packet))
511 goto unlock_drop;
512
513 spin_lock_irqsave(&packet->qp->r_lock, flags);
514 packet_handler = qp_ok(packet);
515 if (likely(packet_handler))
516 packet_handler(packet);
517 else
518 ibp->rvp.n_pkt_drops++;
519 spin_unlock_irqrestore(&packet->qp->r_lock, flags);
520 rcu_read_unlock();
521 }
522 return;
523unlock_drop:
524 rcu_read_unlock();
525drop:
526 ibp->rvp.n_pkt_drops++;
527}
528
529/**
530 * hfi1_ib_rcv - process an incoming packet
531 * @packet: data packet information
532 *
533 * This is called to process an incoming packet at interrupt level.
534 */
535void hfi1_ib_rcv(struct hfi1_packet *packet)
536{
537 struct hfi1_ctxtdata *rcd = packet->rcd;
538
539 trace_input_ibhdr(rcd->dd, packet, !!(rhf_dc_info(packet->rhf)));
540 hfi1_handle_packet(packet, hfi1_check_mcast(packet->dlid));
541}
542
543void hfi1_16B_rcv(struct hfi1_packet *packet)
544{
545 struct hfi1_ctxtdata *rcd = packet->rcd;
546
547 trace_input_ibhdr(rcd->dd, packet, false);
548 hfi1_handle_packet(packet, hfi1_check_mcast(packet->dlid));
549}
550
551/*
552 * This is called from a timer to check for QPs
553 * which need kernel memory in order to send a packet.
554 */
555static void mem_timer(struct timer_list *t)
556{
557 struct hfi1_ibdev *dev = from_timer(dev, t, mem_timer);
558 struct list_head *list = &dev->memwait;
559 struct rvt_qp *qp = NULL;
560 struct iowait *wait;
561 unsigned long flags;
562 struct hfi1_qp_priv *priv;
563
564 write_seqlock_irqsave(&dev->iowait_lock, flags);
565 if (!list_empty(list)) {
566 wait = list_first_entry(list, struct iowait, list);
567 qp = iowait_to_qp(wait);
568 priv = qp->priv;
569 list_del_init(&priv->s_iowait.list);
570 priv->s_iowait.lock = NULL;
571 /* refcount held until actual wake up */
572 if (!list_empty(list))
573 mod_timer(&dev->mem_timer, jiffies + 1);
574 }
575 write_sequnlock_irqrestore(&dev->iowait_lock, flags);
576
577 if (qp)
578 hfi1_qp_wakeup(qp, RVT_S_WAIT_KMEM);
579}
580
581/*
582 * This is called with progress side lock held.
583 */
584/* New API */
585static void verbs_sdma_complete(
586 struct sdma_txreq *cookie,
587 int status)
588{
589 struct verbs_txreq *tx =
590 container_of(cookie, struct verbs_txreq, txreq);
591 struct rvt_qp *qp = tx->qp;
592
593 spin_lock(&qp->s_lock);
594 if (tx->wqe) {
595 rvt_send_complete(qp, tx->wqe, IB_WC_SUCCESS);
596 } else if (qp->ibqp.qp_type == IB_QPT_RC) {
597 struct hfi1_opa_header *hdr;
598
599 hdr = &tx->phdr.hdr;
600 if (unlikely(status == SDMA_TXREQ_S_ABORTED))
601 hfi1_rc_verbs_aborted(qp, hdr);
602 hfi1_rc_send_complete(qp, hdr);
603 }
604 spin_unlock(&qp->s_lock);
605
606 hfi1_put_txreq(tx);
607}
608
609void hfi1_wait_kmem(struct rvt_qp *qp)
610{
611 struct hfi1_qp_priv *priv = qp->priv;
612 struct ib_qp *ibqp = &qp->ibqp;
613 struct ib_device *ibdev = ibqp->device;
614 struct hfi1_ibdev *dev = to_idev(ibdev);
615
616 if (list_empty(&priv->s_iowait.list)) {
617 if (list_empty(&dev->memwait))
618 mod_timer(&dev->mem_timer, jiffies + 1);
619 qp->s_flags |= RVT_S_WAIT_KMEM;
620 list_add_tail(&priv->s_iowait.list, &dev->memwait);
621 priv->s_iowait.lock = &dev->iowait_lock;
622 trace_hfi1_qpsleep(qp, RVT_S_WAIT_KMEM);
623 rvt_get_qp(qp);
624 }
625}
626
627static int wait_kmem(struct hfi1_ibdev *dev,
628 struct rvt_qp *qp,
629 struct hfi1_pkt_state *ps)
630{
631 unsigned long flags;
632 int ret = 0;
633
634 spin_lock_irqsave(&qp->s_lock, flags);
635 if (ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK) {
636 write_seqlock(&dev->iowait_lock);
637 list_add_tail(&ps->s_txreq->txreq.list,
638 &ps->wait->tx_head);
639 hfi1_wait_kmem(qp);
640 write_sequnlock(&dev->iowait_lock);
641 hfi1_qp_unbusy(qp, ps->wait);
642 ret = -EBUSY;
643 }
644 spin_unlock_irqrestore(&qp->s_lock, flags);
645
646 return ret;
647}
648
649/*
650 * This routine calls txadds for each sg entry.
651 *
652 * Add failures will revert the sge cursor
653 */
654static noinline int build_verbs_ulp_payload(
655 struct sdma_engine *sde,
656 u32 length,
657 struct verbs_txreq *tx)
658{
659 struct rvt_sge_state *ss = tx->ss;
660 struct rvt_sge *sg_list = ss->sg_list;
661 struct rvt_sge sge = ss->sge;
662 u8 num_sge = ss->num_sge;
663 u32 len;
664 int ret = 0;
665
666 while (length) {
667 len = rvt_get_sge_length(&ss->sge, length);
668 WARN_ON_ONCE(len == 0);
669 ret = sdma_txadd_kvaddr(
670 sde->dd,
671 &tx->txreq,
672 ss->sge.vaddr,
673 len);
674 if (ret)
675 goto bail_txadd;
676 rvt_update_sge(ss, len, false);
677 length -= len;
678 }
679 return ret;
680bail_txadd:
681 /* unwind cursor */
682 ss->sge = sge;
683 ss->num_sge = num_sge;
684 ss->sg_list = sg_list;
685 return ret;
686}
687
688/**
689 * update_tx_opstats - record stats by opcode
690 * @qp: the qp
691 * @ps: transmit packet state
692 * @plen: the plen in dwords
693 *
694 * This is a routine to record the tx opstats after a
695 * packet has been presented to the egress mechanism.
696 */
697static void update_tx_opstats(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
698 u32 plen)
699{
700#ifdef CONFIG_DEBUG_FS
701 struct hfi1_devdata *dd = dd_from_ibdev(qp->ibqp.device);
702 struct hfi1_opcode_stats_perctx *s = get_cpu_ptr(dd->tx_opstats);
703
704 inc_opstats(plen * 4, &s->stats[ps->opcode]);
705 put_cpu_ptr(s);
706#endif
707}
708
709/*
710 * Build the number of DMA descriptors needed to send length bytes of data.
711 *
712 * NOTE: DMA mapping is held in the tx until completed in the ring or
713 * the tx desc is freed without having been submitted to the ring
714 *
715 * This routine ensures all the helper routine calls succeed.
716 */
717/* New API */
718static int build_verbs_tx_desc(
719 struct sdma_engine *sde,
720 u32 length,
721 struct verbs_txreq *tx,
722 struct hfi1_ahg_info *ahg_info,
723 u64 pbc)
724{
725 int ret = 0;
726 struct hfi1_sdma_header *phdr = &tx->phdr;
727 u16 hdrbytes = (tx->hdr_dwords + sizeof(pbc) / 4) << 2;
728 u8 extra_bytes = 0;
729
730 if (tx->phdr.hdr.hdr_type) {
731 /*
732 * hdrbytes accounts for PBC. Need to subtract 8 bytes
733 * before calculating padding.
734 */
735 extra_bytes = hfi1_get_16b_padding(hdrbytes - 8, length) +
736 (SIZE_OF_CRC << 2) + SIZE_OF_LT;
737 }
738 if (!ahg_info->ahgcount) {
739 ret = sdma_txinit_ahg(
740 &tx->txreq,
741 ahg_info->tx_flags,
742 hdrbytes + length +
743 extra_bytes,
744 ahg_info->ahgidx,
745 0,
746 NULL,
747 0,
748 verbs_sdma_complete);
749 if (ret)
750 goto bail_txadd;
751 phdr->pbc = cpu_to_le64(pbc);
752 ret = sdma_txadd_kvaddr(
753 sde->dd,
754 &tx->txreq,
755 phdr,
756 hdrbytes);
757 if (ret)
758 goto bail_txadd;
759 } else {
760 ret = sdma_txinit_ahg(
761 &tx->txreq,
762 ahg_info->tx_flags,
763 length,
764 ahg_info->ahgidx,
765 ahg_info->ahgcount,
766 ahg_info->ahgdesc,
767 hdrbytes,
768 verbs_sdma_complete);
769 if (ret)
770 goto bail_txadd;
771 }
772 /* add the ulp payload - if any. tx->ss can be NULL for acks */
773 if (tx->ss) {
774 ret = build_verbs_ulp_payload(sde, length, tx);
775 if (ret)
776 goto bail_txadd;
777 }
778
779 /* add icrc, lt byte, and padding to flit */
780 if (extra_bytes)
781 ret = sdma_txadd_daddr(sde->dd, &tx->txreq, sde->dd->sdma_pad_phys,
782 extra_bytes);
783
784bail_txadd:
785 return ret;
786}
787
788static u64 update_hcrc(u8 opcode, u64 pbc)
789{
790 if ((opcode & IB_OPCODE_TID_RDMA) == IB_OPCODE_TID_RDMA) {
791 pbc &= ~PBC_INSERT_HCRC_SMASK;
792 pbc |= (u64)PBC_IHCRC_LKDETH << PBC_INSERT_HCRC_SHIFT;
793 }
794 return pbc;
795}
796
797int hfi1_verbs_send_dma(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
798 u64 pbc)
799{
800 struct hfi1_qp_priv *priv = qp->priv;
801 struct hfi1_ahg_info *ahg_info = priv->s_ahg;
802 u32 hdrwords = ps->s_txreq->hdr_dwords;
803 u32 len = ps->s_txreq->s_cur_size;
804 u32 plen;
805 struct hfi1_ibdev *dev = ps->dev;
806 struct hfi1_pportdata *ppd = ps->ppd;
807 struct verbs_txreq *tx;
808 u8 sc5 = priv->s_sc;
809 int ret;
810 u32 dwords;
811
812 if (ps->s_txreq->phdr.hdr.hdr_type) {
813 u8 extra_bytes = hfi1_get_16b_padding((hdrwords << 2), len);
814
815 dwords = (len + extra_bytes + (SIZE_OF_CRC << 2) +
816 SIZE_OF_LT) >> 2;
817 } else {
818 dwords = (len + 3) >> 2;
819 }
820 plen = hdrwords + dwords + sizeof(pbc) / 4;
821
822 tx = ps->s_txreq;
823 if (!sdma_txreq_built(&tx->txreq)) {
824 if (likely(pbc == 0)) {
825 u32 vl = sc_to_vlt(dd_from_ibdev(qp->ibqp.device), sc5);
826
827 /* No vl15 here */
828 /* set PBC_DC_INFO bit (aka SC[4]) in pbc */
829 if (ps->s_txreq->phdr.hdr.hdr_type)
830 pbc |= PBC_PACKET_BYPASS |
831 PBC_INSERT_BYPASS_ICRC;
832 else
833 pbc |= (ib_is_sc5(sc5) << PBC_DC_INFO_SHIFT);
834
835 pbc = create_pbc(ppd,
836 pbc,
837 qp->srate_mbps,
838 vl,
839 plen);
840
841 if (unlikely(hfi1_dbg_should_fault_tx(qp, ps->opcode)))
842 pbc = hfi1_fault_tx(qp, ps->opcode, pbc);
843 else
844 /* Update HCRC based on packet opcode */
845 pbc = update_hcrc(ps->opcode, pbc);
846 }
847 tx->wqe = qp->s_wqe;
848 ret = build_verbs_tx_desc(tx->sde, len, tx, ahg_info, pbc);
849 if (unlikely(ret))
850 goto bail_build;
851 }
852 ret = sdma_send_txreq(tx->sde, ps->wait, &tx->txreq, ps->pkts_sent);
853 if (unlikely(ret < 0)) {
854 if (ret == -ECOMM)
855 goto bail_ecomm;
856 return ret;
857 }
858
859 update_tx_opstats(qp, ps, plen);
860 trace_sdma_output_ibhdr(dd_from_ibdev(qp->ibqp.device),
861 &ps->s_txreq->phdr.hdr, ib_is_sc5(sc5));
862 return ret;
863
864bail_ecomm:
865 /* The current one got "sent" */
866 return 0;
867bail_build:
868 ret = wait_kmem(dev, qp, ps);
869 if (!ret) {
870 /* free txreq - bad state */
871 hfi1_put_txreq(ps->s_txreq);
872 ps->s_txreq = NULL;
873 }
874 return ret;
875}
876
877/*
878 * If we are now in the error state, return zero to flush the
879 * send work request.
880 */
881static int pio_wait(struct rvt_qp *qp,
882 struct send_context *sc,
883 struct hfi1_pkt_state *ps,
884 u32 flag)
885{
886 struct hfi1_qp_priv *priv = qp->priv;
887 struct hfi1_devdata *dd = sc->dd;
888 unsigned long flags;
889 int ret = 0;
890
891 /*
892 * Note that as soon as want_buffer() is called and
893 * possibly before it returns, sc_piobufavail()
894 * could be called. Therefore, put QP on the I/O wait list before
895 * enabling the PIO avail interrupt.
896 */
897 spin_lock_irqsave(&qp->s_lock, flags);
898 if (ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK) {
899 write_seqlock(&sc->waitlock);
900 list_add_tail(&ps->s_txreq->txreq.list,
901 &ps->wait->tx_head);
902 if (list_empty(&priv->s_iowait.list)) {
903 struct hfi1_ibdev *dev = &dd->verbs_dev;
904 int was_empty;
905
906 dev->n_piowait += !!(flag & RVT_S_WAIT_PIO);
907 dev->n_piodrain += !!(flag & HFI1_S_WAIT_PIO_DRAIN);
908 qp->s_flags |= flag;
909 was_empty = list_empty(&sc->piowait);
910 iowait_get_priority(&priv->s_iowait);
911 iowait_queue(ps->pkts_sent, &priv->s_iowait,
912 &sc->piowait);
913 priv->s_iowait.lock = &sc->waitlock;
914 trace_hfi1_qpsleep(qp, RVT_S_WAIT_PIO);
915 rvt_get_qp(qp);
916 /* counting: only call wantpiobuf_intr if first user */
917 if (was_empty)
918 hfi1_sc_wantpiobuf_intr(sc, 1);
919 }
920 write_sequnlock(&sc->waitlock);
921 hfi1_qp_unbusy(qp, ps->wait);
922 ret = -EBUSY;
923 }
924 spin_unlock_irqrestore(&qp->s_lock, flags);
925 return ret;
926}
927
928static void verbs_pio_complete(void *arg, int code)
929{
930 struct rvt_qp *qp = (struct rvt_qp *)arg;
931 struct hfi1_qp_priv *priv = qp->priv;
932
933 if (iowait_pio_dec(&priv->s_iowait))
934 iowait_drain_wakeup(&priv->s_iowait);
935}
936
937int hfi1_verbs_send_pio(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
938 u64 pbc)
939{
940 struct hfi1_qp_priv *priv = qp->priv;
941 u32 hdrwords = ps->s_txreq->hdr_dwords;
942 struct rvt_sge_state *ss = ps->s_txreq->ss;
943 u32 len = ps->s_txreq->s_cur_size;
944 u32 dwords;
945 u32 plen;
946 struct hfi1_pportdata *ppd = ps->ppd;
947 u32 *hdr;
948 u8 sc5;
949 unsigned long flags = 0;
950 struct send_context *sc;
951 struct pio_buf *pbuf;
952 int wc_status = IB_WC_SUCCESS;
953 int ret = 0;
954 pio_release_cb cb = NULL;
955 u8 extra_bytes = 0;
956
957 if (ps->s_txreq->phdr.hdr.hdr_type) {
958 u8 pad_size = hfi1_get_16b_padding((hdrwords << 2), len);
959
960 extra_bytes = pad_size + (SIZE_OF_CRC << 2) + SIZE_OF_LT;
961 dwords = (len + extra_bytes) >> 2;
962 hdr = (u32 *)&ps->s_txreq->phdr.hdr.opah;
963 } else {
964 dwords = (len + 3) >> 2;
965 hdr = (u32 *)&ps->s_txreq->phdr.hdr.ibh;
966 }
967 plen = hdrwords + dwords + sizeof(pbc) / 4;
968
969 /* only RC/UC use complete */
970 switch (qp->ibqp.qp_type) {
971 case IB_QPT_RC:
972 case IB_QPT_UC:
973 cb = verbs_pio_complete;
974 break;
975 default:
976 break;
977 }
978
979 /* vl15 special case taken care of in ud.c */
980 sc5 = priv->s_sc;
981 sc = ps->s_txreq->psc;
982
983 if (likely(pbc == 0)) {
984 u8 vl = sc_to_vlt(dd_from_ibdev(qp->ibqp.device), sc5);
985
986 /* set PBC_DC_INFO bit (aka SC[4]) in pbc */
987 if (ps->s_txreq->phdr.hdr.hdr_type)
988 pbc |= PBC_PACKET_BYPASS | PBC_INSERT_BYPASS_ICRC;
989 else
990 pbc |= (ib_is_sc5(sc5) << PBC_DC_INFO_SHIFT);
991
992 pbc = create_pbc(ppd, pbc, qp->srate_mbps, vl, plen);
993 if (unlikely(hfi1_dbg_should_fault_tx(qp, ps->opcode)))
994 pbc = hfi1_fault_tx(qp, ps->opcode, pbc);
995 else
996 /* Update HCRC based on packet opcode */
997 pbc = update_hcrc(ps->opcode, pbc);
998 }
999 if (cb)
1000 iowait_pio_inc(&priv->s_iowait);
1001 pbuf = sc_buffer_alloc(sc, plen, cb, qp);
1002 if (IS_ERR_OR_NULL(pbuf)) {
1003 if (cb)
1004 verbs_pio_complete(qp, 0);
1005 if (IS_ERR(pbuf)) {
1006 /*
1007 * If we have filled the PIO buffers to capacity and are
1008 * not in an active state this request is not going to
1009 * go out to so just complete it with an error or else a
1010 * ULP or the core may be stuck waiting.
1011 */
1012 hfi1_cdbg(
1013 PIO,
1014 "alloc failed. state not active, completing");
1015 wc_status = IB_WC_GENERAL_ERR;
1016 goto pio_bail;
1017 } else {
1018 /*
1019 * This is a normal occurrence. The PIO buffs are full
1020 * up but we are still happily sending, well we could be
1021 * so lets continue to queue the request.
1022 */
1023 hfi1_cdbg(PIO, "alloc failed. state active, queuing");
1024 ret = pio_wait(qp, sc, ps, RVT_S_WAIT_PIO);
1025 if (!ret)
1026 /* txreq not queued - free */
1027 goto bail;
1028 /* tx consumed in wait */
1029 return ret;
1030 }
1031 }
1032
1033 if (dwords == 0) {
1034 pio_copy(ppd->dd, pbuf, pbc, hdr, hdrwords);
1035 } else {
1036 seg_pio_copy_start(pbuf, pbc,
1037 hdr, hdrwords * 4);
1038 if (ss) {
1039 while (len) {
1040 void *addr = ss->sge.vaddr;
1041 u32 slen = rvt_get_sge_length(&ss->sge, len);
1042
1043 rvt_update_sge(ss, slen, false);
1044 seg_pio_copy_mid(pbuf, addr, slen);
1045 len -= slen;
1046 }
1047 }
1048 /* add icrc, lt byte, and padding to flit */
1049 if (extra_bytes)
1050 seg_pio_copy_mid(pbuf, ppd->dd->sdma_pad_dma,
1051 extra_bytes);
1052
1053 seg_pio_copy_end(pbuf);
1054 }
1055
1056 update_tx_opstats(qp, ps, plen);
1057 trace_pio_output_ibhdr(dd_from_ibdev(qp->ibqp.device),
1058 &ps->s_txreq->phdr.hdr, ib_is_sc5(sc5));
1059
1060pio_bail:
1061 spin_lock_irqsave(&qp->s_lock, flags);
1062 if (qp->s_wqe) {
1063 rvt_send_complete(qp, qp->s_wqe, wc_status);
1064 } else if (qp->ibqp.qp_type == IB_QPT_RC) {
1065 if (unlikely(wc_status == IB_WC_GENERAL_ERR))
1066 hfi1_rc_verbs_aborted(qp, &ps->s_txreq->phdr.hdr);
1067 hfi1_rc_send_complete(qp, &ps->s_txreq->phdr.hdr);
1068 }
1069 spin_unlock_irqrestore(&qp->s_lock, flags);
1070
1071 ret = 0;
1072
1073bail:
1074 hfi1_put_txreq(ps->s_txreq);
1075 return ret;
1076}
1077
1078/*
1079 * egress_pkey_matches_entry - return 1 if the pkey matches ent (ent
1080 * being an entry from the partition key table), return 0
1081 * otherwise. Use the matching criteria for egress partition keys
1082 * specified in the OPAv1 spec., section 9.1l.7.
1083 */
1084static inline int egress_pkey_matches_entry(u16 pkey, u16 ent)
1085{
1086 u16 mkey = pkey & PKEY_LOW_15_MASK;
1087 u16 mentry = ent & PKEY_LOW_15_MASK;
1088
1089 if (mkey == mentry) {
1090 /*
1091 * If pkey[15] is set (full partition member),
1092 * is bit 15 in the corresponding table element
1093 * clear (limited member)?
1094 */
1095 if (pkey & PKEY_MEMBER_MASK)
1096 return !!(ent & PKEY_MEMBER_MASK);
1097 return 1;
1098 }
1099 return 0;
1100}
1101
1102/**
1103 * egress_pkey_check - check P_KEY of a packet
1104 * @ppd: Physical IB port data
1105 * @slid: SLID for packet
1106 * @pkey: PKEY for header
1107 * @sc5: SC for packet
1108 * @s_pkey_index: It will be used for look up optimization for kernel contexts
1109 * only. If it is negative value, then it means user contexts is calling this
1110 * function.
1111 *
1112 * It checks if hdr's pkey is valid.
1113 *
1114 * Return: 0 on success, otherwise, 1
1115 */
1116int egress_pkey_check(struct hfi1_pportdata *ppd, u32 slid, u16 pkey,
1117 u8 sc5, int8_t s_pkey_index)
1118{
1119 struct hfi1_devdata *dd;
1120 int i;
1121 int is_user_ctxt_mechanism = (s_pkey_index < 0);
1122
1123 if (!(ppd->part_enforce & HFI1_PART_ENFORCE_OUT))
1124 return 0;
1125
1126 /* If SC15, pkey[0:14] must be 0x7fff */
1127 if ((sc5 == 0xf) && ((pkey & PKEY_LOW_15_MASK) != PKEY_LOW_15_MASK))
1128 goto bad;
1129
1130 /* Is the pkey = 0x0, or 0x8000? */
1131 if ((pkey & PKEY_LOW_15_MASK) == 0)
1132 goto bad;
1133
1134 /*
1135 * For the kernel contexts only, if a qp is passed into the function,
1136 * the most likely matching pkey has index qp->s_pkey_index
1137 */
1138 if (!is_user_ctxt_mechanism &&
1139 egress_pkey_matches_entry(pkey, ppd->pkeys[s_pkey_index])) {
1140 return 0;
1141 }
1142
1143 for (i = 0; i < MAX_PKEY_VALUES; i++) {
1144 if (egress_pkey_matches_entry(pkey, ppd->pkeys[i]))
1145 return 0;
1146 }
1147bad:
1148 /*
1149 * For the user-context mechanism, the P_KEY check would only happen
1150 * once per SDMA request, not once per packet. Therefore, there's no
1151 * need to increment the counter for the user-context mechanism.
1152 */
1153 if (!is_user_ctxt_mechanism) {
1154 incr_cntr64(&ppd->port_xmit_constraint_errors);
1155 dd = ppd->dd;
1156 if (!(dd->err_info_xmit_constraint.status &
1157 OPA_EI_STATUS_SMASK)) {
1158 dd->err_info_xmit_constraint.status |=
1159 OPA_EI_STATUS_SMASK;
1160 dd->err_info_xmit_constraint.slid = slid;
1161 dd->err_info_xmit_constraint.pkey = pkey;
1162 }
1163 }
1164 return 1;
1165}
1166
1167/*
1168 * get_send_routine - choose an egress routine
1169 *
1170 * Choose an egress routine based on QP type
1171 * and size
1172 */
1173static inline send_routine get_send_routine(struct rvt_qp *qp,
1174 struct hfi1_pkt_state *ps)
1175{
1176 struct hfi1_devdata *dd = dd_from_ibdev(qp->ibqp.device);
1177 struct hfi1_qp_priv *priv = qp->priv;
1178 struct verbs_txreq *tx = ps->s_txreq;
1179
1180 if (unlikely(!(dd->flags & HFI1_HAS_SEND_DMA)))
1181 return dd->process_pio_send;
1182 switch (qp->ibqp.qp_type) {
1183 case IB_QPT_SMI:
1184 return dd->process_pio_send;
1185 case IB_QPT_GSI:
1186 case IB_QPT_UD:
1187 break;
1188 case IB_QPT_UC:
1189 case IB_QPT_RC:
1190 priv->s_running_pkt_size =
1191 (tx->s_cur_size + priv->s_running_pkt_size) / 2;
1192 if (piothreshold &&
1193 priv->s_running_pkt_size <= min(piothreshold, qp->pmtu) &&
1194 (BIT(ps->opcode & OPMASK) & pio_opmask[ps->opcode >> 5]) &&
1195 iowait_sdma_pending(&priv->s_iowait) == 0 &&
1196 !sdma_txreq_built(&tx->txreq))
1197 return dd->process_pio_send;
1198 break;
1199 default:
1200 break;
1201 }
1202 return dd->process_dma_send;
1203}
1204
1205/**
1206 * hfi1_verbs_send - send a packet
1207 * @qp: the QP to send on
1208 * @ps: the state of the packet to send
1209 *
1210 * Return zero if packet is sent or queued OK.
1211 * Return non-zero and clear qp->s_flags RVT_S_BUSY otherwise.
1212 */
1213int hfi1_verbs_send(struct rvt_qp *qp, struct hfi1_pkt_state *ps)
1214{
1215 struct hfi1_devdata *dd = dd_from_ibdev(qp->ibqp.device);
1216 struct hfi1_qp_priv *priv = qp->priv;
1217 struct ib_other_headers *ohdr = NULL;
1218 send_routine sr;
1219 int ret;
1220 u16 pkey;
1221 u32 slid;
1222 u8 l4 = 0;
1223
1224 /* locate the pkey within the headers */
1225 if (ps->s_txreq->phdr.hdr.hdr_type) {
1226 struct hfi1_16b_header *hdr = &ps->s_txreq->phdr.hdr.opah;
1227
1228 l4 = hfi1_16B_get_l4(hdr);
1229 if (l4 == OPA_16B_L4_IB_LOCAL)
1230 ohdr = &hdr->u.oth;
1231 else if (l4 == OPA_16B_L4_IB_GLOBAL)
1232 ohdr = &hdr->u.l.oth;
1233
1234 slid = hfi1_16B_get_slid(hdr);
1235 pkey = hfi1_16B_get_pkey(hdr);
1236 } else {
1237 struct ib_header *hdr = &ps->s_txreq->phdr.hdr.ibh;
1238 u8 lnh = ib_get_lnh(hdr);
1239
1240 if (lnh == HFI1_LRH_GRH)
1241 ohdr = &hdr->u.l.oth;
1242 else
1243 ohdr = &hdr->u.oth;
1244 slid = ib_get_slid(hdr);
1245 pkey = ib_bth_get_pkey(ohdr);
1246 }
1247
1248 if (likely(l4 != OPA_16B_L4_FM))
1249 ps->opcode = ib_bth_get_opcode(ohdr);
1250 else
1251 ps->opcode = IB_OPCODE_UD_SEND_ONLY;
1252
1253 sr = get_send_routine(qp, ps);
1254 ret = egress_pkey_check(dd->pport, slid, pkey,
1255 priv->s_sc, qp->s_pkey_index);
1256 if (unlikely(ret)) {
1257 /*
1258 * The value we are returning here does not get propagated to
1259 * the verbs caller. Thus we need to complete the request with
1260 * error otherwise the caller could be sitting waiting on the
1261 * completion event. Only do this for PIO. SDMA has its own
1262 * mechanism for handling the errors. So for SDMA we can just
1263 * return.
1264 */
1265 if (sr == dd->process_pio_send) {
1266 unsigned long flags;
1267
1268 hfi1_cdbg(PIO, "%s() Failed. Completing with err",
1269 __func__);
1270 spin_lock_irqsave(&qp->s_lock, flags);
1271 rvt_send_complete(qp, qp->s_wqe, IB_WC_GENERAL_ERR);
1272 spin_unlock_irqrestore(&qp->s_lock, flags);
1273 }
1274 return -EINVAL;
1275 }
1276 if (sr == dd->process_dma_send && iowait_pio_pending(&priv->s_iowait))
1277 return pio_wait(qp,
1278 ps->s_txreq->psc,
1279 ps,
1280 HFI1_S_WAIT_PIO_DRAIN);
1281 return sr(qp, ps, 0);
1282}
1283
1284/**
1285 * hfi1_fill_device_attr - Fill in rvt dev info device attributes.
1286 * @dd: the device data structure
1287 */
1288static void hfi1_fill_device_attr(struct hfi1_devdata *dd)
1289{
1290 struct rvt_dev_info *rdi = &dd->verbs_dev.rdi;
1291 u32 ver = dd->dc8051_ver;
1292
1293 memset(&rdi->dparms.props, 0, sizeof(rdi->dparms.props));
1294
1295 rdi->dparms.props.fw_ver = ((u64)(dc8051_ver_maj(ver)) << 32) |
1296 ((u64)(dc8051_ver_min(ver)) << 16) |
1297 (u64)dc8051_ver_patch(ver);
1298
1299 rdi->dparms.props.device_cap_flags = IB_DEVICE_BAD_PKEY_CNTR |
1300 IB_DEVICE_BAD_QKEY_CNTR | IB_DEVICE_SHUTDOWN_PORT |
1301 IB_DEVICE_SYS_IMAGE_GUID | IB_DEVICE_RC_RNR_NAK_GEN |
1302 IB_DEVICE_PORT_ACTIVE_EVENT | IB_DEVICE_SRQ_RESIZE |
1303 IB_DEVICE_MEM_MGT_EXTENSIONS;
1304 rdi->dparms.props.kernel_cap_flags = IBK_RDMA_NETDEV_OPA;
1305 rdi->dparms.props.page_size_cap = PAGE_SIZE;
1306 rdi->dparms.props.vendor_id = dd->oui1 << 16 | dd->oui2 << 8 | dd->oui3;
1307 rdi->dparms.props.vendor_part_id = dd->pcidev->device;
1308 rdi->dparms.props.hw_ver = dd->minrev;
1309 rdi->dparms.props.sys_image_guid = ib_hfi1_sys_image_guid;
1310 rdi->dparms.props.max_mr_size = U64_MAX;
1311 rdi->dparms.props.max_fast_reg_page_list_len = UINT_MAX;
1312 rdi->dparms.props.max_qp = hfi1_max_qps;
1313 rdi->dparms.props.max_qp_wr =
1314 (hfi1_max_qp_wrs >= HFI1_QP_WQE_INVALID ?
1315 HFI1_QP_WQE_INVALID - 1 : hfi1_max_qp_wrs);
1316 rdi->dparms.props.max_send_sge = hfi1_max_sges;
1317 rdi->dparms.props.max_recv_sge = hfi1_max_sges;
1318 rdi->dparms.props.max_sge_rd = hfi1_max_sges;
1319 rdi->dparms.props.max_cq = hfi1_max_cqs;
1320 rdi->dparms.props.max_ah = hfi1_max_ahs;
1321 rdi->dparms.props.max_cqe = hfi1_max_cqes;
1322 rdi->dparms.props.max_pd = hfi1_max_pds;
1323 rdi->dparms.props.max_qp_rd_atom = HFI1_MAX_RDMA_ATOMIC;
1324 rdi->dparms.props.max_qp_init_rd_atom = 255;
1325 rdi->dparms.props.max_srq = hfi1_max_srqs;
1326 rdi->dparms.props.max_srq_wr = hfi1_max_srq_wrs;
1327 rdi->dparms.props.max_srq_sge = hfi1_max_srq_sges;
1328 rdi->dparms.props.atomic_cap = IB_ATOMIC_GLOB;
1329 rdi->dparms.props.max_pkeys = hfi1_get_npkeys(dd);
1330 rdi->dparms.props.max_mcast_grp = hfi1_max_mcast_grps;
1331 rdi->dparms.props.max_mcast_qp_attach = hfi1_max_mcast_qp_attached;
1332 rdi->dparms.props.max_total_mcast_qp_attach =
1333 rdi->dparms.props.max_mcast_qp_attach *
1334 rdi->dparms.props.max_mcast_grp;
1335}
1336
1337static inline u16 opa_speed_to_ib(u16 in)
1338{
1339 u16 out = 0;
1340
1341 if (in & OPA_LINK_SPEED_25G)
1342 out |= IB_SPEED_EDR;
1343 if (in & OPA_LINK_SPEED_12_5G)
1344 out |= IB_SPEED_FDR;
1345
1346 return out;
1347}
1348
1349/*
1350 * Convert a single OPA link width (no multiple flags) to an IB value.
1351 * A zero OPA link width means link down, which means the IB width value
1352 * is a don't care.
1353 */
1354static inline u16 opa_width_to_ib(u16 in)
1355{
1356 switch (in) {
1357 case OPA_LINK_WIDTH_1X:
1358 /* map 2x and 3x to 1x as they don't exist in IB */
1359 case OPA_LINK_WIDTH_2X:
1360 case OPA_LINK_WIDTH_3X:
1361 return IB_WIDTH_1X;
1362 default: /* link down or unknown, return our largest width */
1363 case OPA_LINK_WIDTH_4X:
1364 return IB_WIDTH_4X;
1365 }
1366}
1367
1368static int query_port(struct rvt_dev_info *rdi, u32 port_num,
1369 struct ib_port_attr *props)
1370{
1371 struct hfi1_ibdev *verbs_dev = dev_from_rdi(rdi);
1372 struct hfi1_devdata *dd = dd_from_dev(verbs_dev);
1373 struct hfi1_pportdata *ppd = &dd->pport[port_num - 1];
1374 u32 lid = ppd->lid;
1375
1376 /* props being zeroed by the caller, avoid zeroing it here */
1377 props->lid = lid ? lid : 0;
1378 props->lmc = ppd->lmc;
1379 /* OPA logical states match IB logical states */
1380 props->state = driver_lstate(ppd);
1381 props->phys_state = driver_pstate(ppd);
1382 props->gid_tbl_len = HFI1_GUIDS_PER_PORT;
1383 props->active_width = (u8)opa_width_to_ib(ppd->link_width_active);
1384 /* see rate_show() in ib core/sysfs.c */
1385 props->active_speed = opa_speed_to_ib(ppd->link_speed_active);
1386 props->max_vl_num = ppd->vls_supported;
1387
1388 /* Once we are a "first class" citizen and have added the OPA MTUs to
1389 * the core we can advertise the larger MTU enum to the ULPs, for now
1390 * advertise only 4K.
1391 *
1392 * Those applications which are either OPA aware or pass the MTU enum
1393 * from the Path Records to us will get the new 8k MTU. Those that
1394 * attempt to process the MTU enum may fail in various ways.
1395 */
1396 props->max_mtu = mtu_to_enum((!valid_ib_mtu(hfi1_max_mtu) ?
1397 4096 : hfi1_max_mtu), IB_MTU_4096);
1398 props->active_mtu = !valid_ib_mtu(ppd->ibmtu) ? props->max_mtu :
1399 mtu_to_enum(ppd->ibmtu, IB_MTU_4096);
1400 props->phys_mtu = hfi1_max_mtu;
1401
1402 return 0;
1403}
1404
1405static int modify_device(struct ib_device *device,
1406 int device_modify_mask,
1407 struct ib_device_modify *device_modify)
1408{
1409 struct hfi1_devdata *dd = dd_from_ibdev(device);
1410 unsigned i;
1411 int ret;
1412
1413 if (device_modify_mask & ~(IB_DEVICE_MODIFY_SYS_IMAGE_GUID |
1414 IB_DEVICE_MODIFY_NODE_DESC)) {
1415 ret = -EOPNOTSUPP;
1416 goto bail;
1417 }
1418
1419 if (device_modify_mask & IB_DEVICE_MODIFY_NODE_DESC) {
1420 memcpy(device->node_desc, device_modify->node_desc,
1421 IB_DEVICE_NODE_DESC_MAX);
1422 for (i = 0; i < dd->num_pports; i++) {
1423 struct hfi1_ibport *ibp = &dd->pport[i].ibport_data;
1424
1425 hfi1_node_desc_chg(ibp);
1426 }
1427 }
1428
1429 if (device_modify_mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID) {
1430 ib_hfi1_sys_image_guid =
1431 cpu_to_be64(device_modify->sys_image_guid);
1432 for (i = 0; i < dd->num_pports; i++) {
1433 struct hfi1_ibport *ibp = &dd->pport[i].ibport_data;
1434
1435 hfi1_sys_guid_chg(ibp);
1436 }
1437 }
1438
1439 ret = 0;
1440
1441bail:
1442 return ret;
1443}
1444
1445static int shut_down_port(struct rvt_dev_info *rdi, u32 port_num)
1446{
1447 struct hfi1_ibdev *verbs_dev = dev_from_rdi(rdi);
1448 struct hfi1_devdata *dd = dd_from_dev(verbs_dev);
1449 struct hfi1_pportdata *ppd = &dd->pport[port_num - 1];
1450
1451 set_link_down_reason(ppd, OPA_LINKDOWN_REASON_UNKNOWN, 0,
1452 OPA_LINKDOWN_REASON_UNKNOWN);
1453 return set_link_state(ppd, HLS_DN_DOWNDEF);
1454}
1455
1456static int hfi1_get_guid_be(struct rvt_dev_info *rdi, struct rvt_ibport *rvp,
1457 int guid_index, __be64 *guid)
1458{
1459 struct hfi1_ibport *ibp = container_of(rvp, struct hfi1_ibport, rvp);
1460
1461 if (guid_index >= HFI1_GUIDS_PER_PORT)
1462 return -EINVAL;
1463
1464 *guid = get_sguid(ibp, guid_index);
1465 return 0;
1466}
1467
1468/*
1469 * convert ah port,sl to sc
1470 */
1471u8 ah_to_sc(struct ib_device *ibdev, struct rdma_ah_attr *ah)
1472{
1473 struct hfi1_ibport *ibp = to_iport(ibdev, rdma_ah_get_port_num(ah));
1474
1475 return ibp->sl_to_sc[rdma_ah_get_sl(ah)];
1476}
1477
1478static int hfi1_check_ah(struct ib_device *ibdev, struct rdma_ah_attr *ah_attr)
1479{
1480 struct hfi1_ibport *ibp;
1481 struct hfi1_pportdata *ppd;
1482 struct hfi1_devdata *dd;
1483 u8 sc5;
1484 u8 sl;
1485
1486 if (hfi1_check_mcast(rdma_ah_get_dlid(ah_attr)) &&
1487 !(rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH))
1488 return -EINVAL;
1489
1490 /* test the mapping for validity */
1491 ibp = to_iport(ibdev, rdma_ah_get_port_num(ah_attr));
1492 ppd = ppd_from_ibp(ibp);
1493 dd = dd_from_ppd(ppd);
1494
1495 sl = rdma_ah_get_sl(ah_attr);
1496 if (sl >= ARRAY_SIZE(ibp->sl_to_sc))
1497 return -EINVAL;
1498 sl = array_index_nospec(sl, ARRAY_SIZE(ibp->sl_to_sc));
1499
1500 sc5 = ibp->sl_to_sc[sl];
1501 if (sc_to_vlt(dd, sc5) > num_vls && sc_to_vlt(dd, sc5) != 0xf)
1502 return -EINVAL;
1503 return 0;
1504}
1505
1506static void hfi1_notify_new_ah(struct ib_device *ibdev,
1507 struct rdma_ah_attr *ah_attr,
1508 struct rvt_ah *ah)
1509{
1510 struct hfi1_ibport *ibp;
1511 struct hfi1_pportdata *ppd;
1512 struct hfi1_devdata *dd;
1513 u8 sc5;
1514 struct rdma_ah_attr *attr = &ah->attr;
1515
1516 /*
1517 * Do not trust reading anything from rvt_ah at this point as it is not
1518 * done being setup. We can however modify things which we need to set.
1519 */
1520
1521 ibp = to_iport(ibdev, rdma_ah_get_port_num(ah_attr));
1522 ppd = ppd_from_ibp(ibp);
1523 sc5 = ibp->sl_to_sc[rdma_ah_get_sl(&ah->attr)];
1524 hfi1_update_ah_attr(ibdev, attr);
1525 hfi1_make_opa_lid(attr);
1526 dd = dd_from_ppd(ppd);
1527 ah->vl = sc_to_vlt(dd, sc5);
1528 if (ah->vl < num_vls || ah->vl == 15)
1529 ah->log_pmtu = ilog2(dd->vld[ah->vl].mtu);
1530}
1531
1532/**
1533 * hfi1_get_npkeys - return the size of the PKEY table for context 0
1534 * @dd: the hfi1_ib device
1535 */
1536unsigned hfi1_get_npkeys(struct hfi1_devdata *dd)
1537{
1538 return ARRAY_SIZE(dd->pport[0].pkeys);
1539}
1540
1541static void init_ibport(struct hfi1_pportdata *ppd)
1542{
1543 struct hfi1_ibport *ibp = &ppd->ibport_data;
1544 size_t sz = ARRAY_SIZE(ibp->sl_to_sc);
1545 int i;
1546
1547 for (i = 0; i < sz; i++) {
1548 ibp->sl_to_sc[i] = i;
1549 ibp->sc_to_sl[i] = i;
1550 }
1551
1552 for (i = 0; i < RVT_MAX_TRAP_LISTS ; i++)
1553 INIT_LIST_HEAD(&ibp->rvp.trap_lists[i].list);
1554 timer_setup(&ibp->rvp.trap_timer, hfi1_handle_trap_timer, 0);
1555
1556 spin_lock_init(&ibp->rvp.lock);
1557 /* Set the prefix to the default value (see ch. 4.1.1) */
1558 ibp->rvp.gid_prefix = IB_DEFAULT_GID_PREFIX;
1559 ibp->rvp.sm_lid = 0;
1560 /*
1561 * Below should only set bits defined in OPA PortInfo.CapabilityMask
1562 * and PortInfo.CapabilityMask3
1563 */
1564 ibp->rvp.port_cap_flags = IB_PORT_AUTO_MIGR_SUP |
1565 IB_PORT_CAP_MASK_NOTICE_SUP;
1566 ibp->rvp.port_cap3_flags = OPA_CAP_MASK3_IsSharedSpaceSupported;
1567 ibp->rvp.pma_counter_select[0] = IB_PMA_PORT_XMIT_DATA;
1568 ibp->rvp.pma_counter_select[1] = IB_PMA_PORT_RCV_DATA;
1569 ibp->rvp.pma_counter_select[2] = IB_PMA_PORT_XMIT_PKTS;
1570 ibp->rvp.pma_counter_select[3] = IB_PMA_PORT_RCV_PKTS;
1571 ibp->rvp.pma_counter_select[4] = IB_PMA_PORT_XMIT_WAIT;
1572
1573 RCU_INIT_POINTER(ibp->rvp.qp[0], NULL);
1574 RCU_INIT_POINTER(ibp->rvp.qp[1], NULL);
1575}
1576
1577static void hfi1_get_dev_fw_str(struct ib_device *ibdev, char *str)
1578{
1579 struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
1580 struct hfi1_ibdev *dev = dev_from_rdi(rdi);
1581 u32 ver = dd_from_dev(dev)->dc8051_ver;
1582
1583 snprintf(str, IB_FW_VERSION_NAME_MAX, "%u.%u.%u", dc8051_ver_maj(ver),
1584 dc8051_ver_min(ver), dc8051_ver_patch(ver));
1585}
1586
1587static const char * const driver_cntr_names[] = {
1588 /* must be element 0*/
1589 "DRIVER_KernIntr",
1590 "DRIVER_ErrorIntr",
1591 "DRIVER_Tx_Errs",
1592 "DRIVER_Rcv_Errs",
1593 "DRIVER_HW_Errs",
1594 "DRIVER_NoPIOBufs",
1595 "DRIVER_CtxtsOpen",
1596 "DRIVER_RcvLen_Errs",
1597 "DRIVER_EgrBufFull",
1598 "DRIVER_EgrHdrFull"
1599};
1600
1601static struct rdma_stat_desc *dev_cntr_descs;
1602static struct rdma_stat_desc *port_cntr_descs;
1603int num_driver_cntrs = ARRAY_SIZE(driver_cntr_names);
1604static int num_dev_cntrs;
1605static int num_port_cntrs;
1606
1607/*
1608 * Convert a list of names separated by '\n' into an array of NULL terminated
1609 * strings. Optionally some entries can be reserved in the array to hold extra
1610 * external strings.
1611 */
1612static int init_cntr_names(const char *names_in, const size_t names_len,
1613 int num_extra_names, int *num_cntrs,
1614 struct rdma_stat_desc **cntr_descs)
1615{
1616 struct rdma_stat_desc *names_out;
1617 char *p;
1618 int i, n;
1619
1620 n = 0;
1621 for (i = 0; i < names_len; i++)
1622 if (names_in[i] == '\n')
1623 n++;
1624
1625 names_out = kzalloc((n + num_extra_names) * sizeof(*names_out)
1626 + names_len,
1627 GFP_KERNEL);
1628 if (!names_out) {
1629 *num_cntrs = 0;
1630 *cntr_descs = NULL;
1631 return -ENOMEM;
1632 }
1633
1634 p = (char *)&names_out[n + num_extra_names];
1635 memcpy(p, names_in, names_len);
1636
1637 for (i = 0; i < n; i++) {
1638 names_out[i].name = p;
1639 p = strchr(p, '\n');
1640 *p++ = '\0';
1641 }
1642
1643 *num_cntrs = n;
1644 *cntr_descs = names_out;
1645 return 0;
1646}
1647
1648static struct rdma_hw_stats *hfi1_alloc_hw_device_stats(struct ib_device *ibdev)
1649{
1650 if (!dev_cntr_descs) {
1651 struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
1652 int i, err;
1653
1654 err = init_cntr_names(dd->cntrnames, dd->cntrnameslen,
1655 num_driver_cntrs,
1656 &num_dev_cntrs, &dev_cntr_descs);
1657 if (err)
1658 return NULL;
1659
1660 for (i = 0; i < num_driver_cntrs; i++)
1661 dev_cntr_descs[num_dev_cntrs + i].name =
1662 driver_cntr_names[i];
1663 }
1664 return rdma_alloc_hw_stats_struct(dev_cntr_descs,
1665 num_dev_cntrs + num_driver_cntrs,
1666 RDMA_HW_STATS_DEFAULT_LIFESPAN);
1667}
1668
1669static struct rdma_hw_stats *hfi_alloc_hw_port_stats(struct ib_device *ibdev,
1670 u32 port_num)
1671{
1672 if (!port_cntr_descs) {
1673 struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
1674 int err;
1675
1676 err = init_cntr_names(dd->portcntrnames, dd->portcntrnameslen,
1677 0,
1678 &num_port_cntrs, &port_cntr_descs);
1679 if (err)
1680 return NULL;
1681 }
1682 return rdma_alloc_hw_stats_struct(port_cntr_descs, num_port_cntrs,
1683 RDMA_HW_STATS_DEFAULT_LIFESPAN);
1684}
1685
1686static u64 hfi1_sps_ints(void)
1687{
1688 unsigned long index, flags;
1689 struct hfi1_devdata *dd;
1690 u64 sps_ints = 0;
1691
1692 xa_lock_irqsave(&hfi1_dev_table, flags);
1693 xa_for_each(&hfi1_dev_table, index, dd) {
1694 sps_ints += get_all_cpu_total(dd->int_counter);
1695 }
1696 xa_unlock_irqrestore(&hfi1_dev_table, flags);
1697 return sps_ints;
1698}
1699
1700static int get_hw_stats(struct ib_device *ibdev, struct rdma_hw_stats *stats,
1701 u32 port, int index)
1702{
1703 u64 *values;
1704 int count;
1705
1706 if (!port) {
1707 u64 *stats = (u64 *)&hfi1_stats;
1708 int i;
1709
1710 hfi1_read_cntrs(dd_from_ibdev(ibdev), NULL, &values);
1711 values[num_dev_cntrs] = hfi1_sps_ints();
1712 for (i = 1; i < num_driver_cntrs; i++)
1713 values[num_dev_cntrs + i] = stats[i];
1714 count = num_dev_cntrs + num_driver_cntrs;
1715 } else {
1716 struct hfi1_ibport *ibp = to_iport(ibdev, port);
1717
1718 hfi1_read_portcntrs(ppd_from_ibp(ibp), NULL, &values);
1719 count = num_port_cntrs;
1720 }
1721
1722 memcpy(stats->value, values, count * sizeof(u64));
1723 return count;
1724}
1725
1726static const struct ib_device_ops hfi1_dev_ops = {
1727 .owner = THIS_MODULE,
1728 .driver_id = RDMA_DRIVER_HFI1,
1729
1730 .alloc_hw_device_stats = hfi1_alloc_hw_device_stats,
1731 .alloc_hw_port_stats = hfi_alloc_hw_port_stats,
1732 .alloc_rdma_netdev = hfi1_vnic_alloc_rn,
1733 .device_group = &ib_hfi1_attr_group,
1734 .get_dev_fw_str = hfi1_get_dev_fw_str,
1735 .get_hw_stats = get_hw_stats,
1736 .modify_device = modify_device,
1737 .port_groups = hfi1_attr_port_groups,
1738 /* keep process mad in the driver */
1739 .process_mad = hfi1_process_mad,
1740 .rdma_netdev_get_params = hfi1_ipoib_rn_get_params,
1741};
1742
1743/**
1744 * hfi1_register_ib_device - register our device with the infiniband core
1745 * @dd: the device data structure
1746 * Return 0 if successful, errno if unsuccessful.
1747 */
1748int hfi1_register_ib_device(struct hfi1_devdata *dd)
1749{
1750 struct hfi1_ibdev *dev = &dd->verbs_dev;
1751 struct ib_device *ibdev = &dev->rdi.ibdev;
1752 struct hfi1_pportdata *ppd = dd->pport;
1753 struct hfi1_ibport *ibp = &ppd->ibport_data;
1754 unsigned i;
1755 int ret;
1756
1757 for (i = 0; i < dd->num_pports; i++)
1758 init_ibport(ppd + i);
1759
1760 /* Only need to initialize non-zero fields. */
1761
1762 timer_setup(&dev->mem_timer, mem_timer, 0);
1763
1764 seqlock_init(&dev->iowait_lock);
1765 seqlock_init(&dev->txwait_lock);
1766 INIT_LIST_HEAD(&dev->txwait);
1767 INIT_LIST_HEAD(&dev->memwait);
1768
1769 ret = verbs_txreq_init(dev);
1770 if (ret)
1771 goto err_verbs_txreq;
1772
1773 /* Use first-port GUID as node guid */
1774 ibdev->node_guid = get_sguid(ibp, HFI1_PORT_GUID_INDEX);
1775
1776 /*
1777 * The system image GUID is supposed to be the same for all
1778 * HFIs in a single system but since there can be other
1779 * device types in the system, we can't be sure this is unique.
1780 */
1781 if (!ib_hfi1_sys_image_guid)
1782 ib_hfi1_sys_image_guid = ibdev->node_guid;
1783 ibdev->phys_port_cnt = dd->num_pports;
1784 ibdev->dev.parent = &dd->pcidev->dev;
1785
1786 ib_set_device_ops(ibdev, &hfi1_dev_ops);
1787
1788 strscpy(ibdev->node_desc, init_utsname()->nodename,
1789 sizeof(ibdev->node_desc));
1790
1791 /*
1792 * Fill in rvt info object.
1793 */
1794 dd->verbs_dev.rdi.driver_f.get_pci_dev = get_pci_dev;
1795 dd->verbs_dev.rdi.driver_f.check_ah = hfi1_check_ah;
1796 dd->verbs_dev.rdi.driver_f.notify_new_ah = hfi1_notify_new_ah;
1797 dd->verbs_dev.rdi.driver_f.get_guid_be = hfi1_get_guid_be;
1798 dd->verbs_dev.rdi.driver_f.query_port_state = query_port;
1799 dd->verbs_dev.rdi.driver_f.shut_down_port = shut_down_port;
1800 dd->verbs_dev.rdi.driver_f.cap_mask_chg = hfi1_cap_mask_chg;
1801 /*
1802 * Fill in rvt info device attributes.
1803 */
1804 hfi1_fill_device_attr(dd);
1805
1806 /* queue pair */
1807 dd->verbs_dev.rdi.dparms.qp_table_size = hfi1_qp_table_size;
1808 dd->verbs_dev.rdi.dparms.qpn_start = 0;
1809 dd->verbs_dev.rdi.dparms.qpn_inc = 1;
1810 dd->verbs_dev.rdi.dparms.qos_shift = dd->qos_shift;
1811 dd->verbs_dev.rdi.dparms.qpn_res_start = RVT_KDETH_QP_BASE;
1812 dd->verbs_dev.rdi.dparms.qpn_res_end = RVT_AIP_QP_MAX;
1813 dd->verbs_dev.rdi.dparms.max_rdma_atomic = HFI1_MAX_RDMA_ATOMIC;
1814 dd->verbs_dev.rdi.dparms.psn_mask = PSN_MASK;
1815 dd->verbs_dev.rdi.dparms.psn_shift = PSN_SHIFT;
1816 dd->verbs_dev.rdi.dparms.psn_modify_mask = PSN_MODIFY_MASK;
1817 dd->verbs_dev.rdi.dparms.core_cap_flags = RDMA_CORE_PORT_INTEL_OPA |
1818 RDMA_CORE_CAP_OPA_AH;
1819 dd->verbs_dev.rdi.dparms.max_mad_size = OPA_MGMT_MAD_SIZE;
1820
1821 dd->verbs_dev.rdi.driver_f.qp_priv_alloc = qp_priv_alloc;
1822 dd->verbs_dev.rdi.driver_f.qp_priv_init = hfi1_qp_priv_init;
1823 dd->verbs_dev.rdi.driver_f.qp_priv_free = qp_priv_free;
1824 dd->verbs_dev.rdi.driver_f.free_all_qps = free_all_qps;
1825 dd->verbs_dev.rdi.driver_f.notify_qp_reset = notify_qp_reset;
1826 dd->verbs_dev.rdi.driver_f.do_send = hfi1_do_send_from_rvt;
1827 dd->verbs_dev.rdi.driver_f.schedule_send = hfi1_schedule_send;
1828 dd->verbs_dev.rdi.driver_f.schedule_send_no_lock = _hfi1_schedule_send;
1829 dd->verbs_dev.rdi.driver_f.get_pmtu_from_attr = get_pmtu_from_attr;
1830 dd->verbs_dev.rdi.driver_f.notify_error_qp = notify_error_qp;
1831 dd->verbs_dev.rdi.driver_f.flush_qp_waiters = flush_qp_waiters;
1832 dd->verbs_dev.rdi.driver_f.stop_send_queue = stop_send_queue;
1833 dd->verbs_dev.rdi.driver_f.quiesce_qp = quiesce_qp;
1834 dd->verbs_dev.rdi.driver_f.notify_error_qp = notify_error_qp;
1835 dd->verbs_dev.rdi.driver_f.mtu_from_qp = mtu_from_qp;
1836 dd->verbs_dev.rdi.driver_f.mtu_to_path_mtu = mtu_to_path_mtu;
1837 dd->verbs_dev.rdi.driver_f.check_modify_qp = hfi1_check_modify_qp;
1838 dd->verbs_dev.rdi.driver_f.modify_qp = hfi1_modify_qp;
1839 dd->verbs_dev.rdi.driver_f.notify_restart_rc = hfi1_restart_rc;
1840 dd->verbs_dev.rdi.driver_f.setup_wqe = hfi1_setup_wqe;
1841 dd->verbs_dev.rdi.driver_f.comp_vect_cpu_lookup =
1842 hfi1_comp_vect_mappings_lookup;
1843
1844 /* completeion queue */
1845 dd->verbs_dev.rdi.ibdev.num_comp_vectors = dd->comp_vect_possible_cpus;
1846 dd->verbs_dev.rdi.dparms.node = dd->node;
1847
1848 /* misc settings */
1849 dd->verbs_dev.rdi.flags = 0; /* Let rdmavt handle it all */
1850 dd->verbs_dev.rdi.dparms.lkey_table_size = hfi1_lkey_table_size;
1851 dd->verbs_dev.rdi.dparms.nports = dd->num_pports;
1852 dd->verbs_dev.rdi.dparms.npkeys = hfi1_get_npkeys(dd);
1853 dd->verbs_dev.rdi.dparms.sge_copy_mode = sge_copy_mode;
1854 dd->verbs_dev.rdi.dparms.wss_threshold = wss_threshold;
1855 dd->verbs_dev.rdi.dparms.wss_clean_period = wss_clean_period;
1856 dd->verbs_dev.rdi.dparms.reserved_operations = 1;
1857 dd->verbs_dev.rdi.dparms.extra_rdma_atomic = HFI1_TID_RDMA_WRITE_CNT;
1858
1859 /* post send table */
1860 dd->verbs_dev.rdi.post_parms = hfi1_post_parms;
1861
1862 /* opcode translation table */
1863 dd->verbs_dev.rdi.wc_opcode = ib_hfi1_wc_opcode;
1864
1865 ppd = dd->pport;
1866 for (i = 0; i < dd->num_pports; i++, ppd++)
1867 rvt_init_port(&dd->verbs_dev.rdi,
1868 &ppd->ibport_data.rvp,
1869 i,
1870 ppd->pkeys);
1871
1872 ret = rvt_register_device(&dd->verbs_dev.rdi);
1873 if (ret)
1874 goto err_verbs_txreq;
1875
1876 ret = hfi1_verbs_register_sysfs(dd);
1877 if (ret)
1878 goto err_class;
1879
1880 return ret;
1881
1882err_class:
1883 rvt_unregister_device(&dd->verbs_dev.rdi);
1884err_verbs_txreq:
1885 verbs_txreq_exit(dev);
1886 dd_dev_err(dd, "cannot register verbs: %d!\n", -ret);
1887 return ret;
1888}
1889
1890void hfi1_unregister_ib_device(struct hfi1_devdata *dd)
1891{
1892 struct hfi1_ibdev *dev = &dd->verbs_dev;
1893
1894 hfi1_verbs_unregister_sysfs(dd);
1895
1896 rvt_unregister_device(&dd->verbs_dev.rdi);
1897
1898 if (!list_empty(&dev->txwait))
1899 dd_dev_err(dd, "txwait list not empty!\n");
1900 if (!list_empty(&dev->memwait))
1901 dd_dev_err(dd, "memwait list not empty!\n");
1902
1903 del_timer_sync(&dev->mem_timer);
1904 verbs_txreq_exit(dev);
1905
1906 kfree(dev_cntr_descs);
1907 kfree(port_cntr_descs);
1908 dev_cntr_descs = NULL;
1909 port_cntr_descs = NULL;
1910}
1911
1912void hfi1_cnp_rcv(struct hfi1_packet *packet)
1913{
1914 struct hfi1_ibport *ibp = rcd_to_iport(packet->rcd);
1915 struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
1916 struct ib_header *hdr = packet->hdr;
1917 struct rvt_qp *qp = packet->qp;
1918 u32 lqpn, rqpn = 0;
1919 u16 rlid = 0;
1920 u8 sl, sc5, svc_type;
1921
1922 switch (packet->qp->ibqp.qp_type) {
1923 case IB_QPT_UC:
1924 rlid = rdma_ah_get_dlid(&qp->remote_ah_attr);
1925 rqpn = qp->remote_qpn;
1926 svc_type = IB_CC_SVCTYPE_UC;
1927 break;
1928 case IB_QPT_RC:
1929 rlid = rdma_ah_get_dlid(&qp->remote_ah_attr);
1930 rqpn = qp->remote_qpn;
1931 svc_type = IB_CC_SVCTYPE_RC;
1932 break;
1933 case IB_QPT_SMI:
1934 case IB_QPT_GSI:
1935 case IB_QPT_UD:
1936 svc_type = IB_CC_SVCTYPE_UD;
1937 break;
1938 default:
1939 ibp->rvp.n_pkt_drops++;
1940 return;
1941 }
1942
1943 sc5 = hfi1_9B_get_sc5(hdr, packet->rhf);
1944 sl = ibp->sc_to_sl[sc5];
1945 lqpn = qp->ibqp.qp_num;
1946
1947 process_becn(ppd, sl, rlid, lqpn, rqpn, svc_type);
1948}
1/*
2 * Copyright(c) 2015 - 2020 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#include <rdma/ib_mad.h>
49#include <rdma/ib_user_verbs.h>
50#include <linux/io.h>
51#include <linux/module.h>
52#include <linux/utsname.h>
53#include <linux/rculist.h>
54#include <linux/mm.h>
55#include <linux/vmalloc.h>
56#include <rdma/opa_addr.h>
57#include <linux/nospec.h>
58
59#include "hfi.h"
60#include "common.h"
61#include "device.h"
62#include "trace.h"
63#include "qp.h"
64#include "verbs_txreq.h"
65#include "debugfs.h"
66#include "vnic.h"
67#include "fault.h"
68#include "affinity.h"
69#include "ipoib.h"
70
71static unsigned int hfi1_lkey_table_size = 16;
72module_param_named(lkey_table_size, hfi1_lkey_table_size, uint,
73 S_IRUGO);
74MODULE_PARM_DESC(lkey_table_size,
75 "LKEY table size in bits (2^n, 1 <= n <= 23)");
76
77static unsigned int hfi1_max_pds = 0xFFFF;
78module_param_named(max_pds, hfi1_max_pds, uint, S_IRUGO);
79MODULE_PARM_DESC(max_pds,
80 "Maximum number of protection domains to support");
81
82static unsigned int hfi1_max_ahs = 0xFFFF;
83module_param_named(max_ahs, hfi1_max_ahs, uint, S_IRUGO);
84MODULE_PARM_DESC(max_ahs, "Maximum number of address handles to support");
85
86unsigned int hfi1_max_cqes = 0x2FFFFF;
87module_param_named(max_cqes, hfi1_max_cqes, uint, S_IRUGO);
88MODULE_PARM_DESC(max_cqes,
89 "Maximum number of completion queue entries to support");
90
91unsigned int hfi1_max_cqs = 0x1FFFF;
92module_param_named(max_cqs, hfi1_max_cqs, uint, S_IRUGO);
93MODULE_PARM_DESC(max_cqs, "Maximum number of completion queues to support");
94
95unsigned int hfi1_max_qp_wrs = 0x3FFF;
96module_param_named(max_qp_wrs, hfi1_max_qp_wrs, uint, S_IRUGO);
97MODULE_PARM_DESC(max_qp_wrs, "Maximum number of QP WRs to support");
98
99unsigned int hfi1_max_qps = 32768;
100module_param_named(max_qps, hfi1_max_qps, uint, S_IRUGO);
101MODULE_PARM_DESC(max_qps, "Maximum number of QPs to support");
102
103unsigned int hfi1_max_sges = 0x60;
104module_param_named(max_sges, hfi1_max_sges, uint, S_IRUGO);
105MODULE_PARM_DESC(max_sges, "Maximum number of SGEs to support");
106
107unsigned int hfi1_max_mcast_grps = 16384;
108module_param_named(max_mcast_grps, hfi1_max_mcast_grps, uint, S_IRUGO);
109MODULE_PARM_DESC(max_mcast_grps,
110 "Maximum number of multicast groups to support");
111
112unsigned int hfi1_max_mcast_qp_attached = 16;
113module_param_named(max_mcast_qp_attached, hfi1_max_mcast_qp_attached,
114 uint, S_IRUGO);
115MODULE_PARM_DESC(max_mcast_qp_attached,
116 "Maximum number of attached QPs to support");
117
118unsigned int hfi1_max_srqs = 1024;
119module_param_named(max_srqs, hfi1_max_srqs, uint, S_IRUGO);
120MODULE_PARM_DESC(max_srqs, "Maximum number of SRQs to support");
121
122unsigned int hfi1_max_srq_sges = 128;
123module_param_named(max_srq_sges, hfi1_max_srq_sges, uint, S_IRUGO);
124MODULE_PARM_DESC(max_srq_sges, "Maximum number of SRQ SGEs to support");
125
126unsigned int hfi1_max_srq_wrs = 0x1FFFF;
127module_param_named(max_srq_wrs, hfi1_max_srq_wrs, uint, S_IRUGO);
128MODULE_PARM_DESC(max_srq_wrs, "Maximum number of SRQ WRs support");
129
130unsigned short piothreshold = 256;
131module_param(piothreshold, ushort, S_IRUGO);
132MODULE_PARM_DESC(piothreshold, "size used to determine sdma vs. pio");
133
134static unsigned int sge_copy_mode;
135module_param(sge_copy_mode, uint, S_IRUGO);
136MODULE_PARM_DESC(sge_copy_mode,
137 "Verbs copy mode: 0 use memcpy, 1 use cacheless copy, 2 adapt based on WSS");
138
139static void verbs_sdma_complete(
140 struct sdma_txreq *cookie,
141 int status);
142
143static int pio_wait(struct rvt_qp *qp,
144 struct send_context *sc,
145 struct hfi1_pkt_state *ps,
146 u32 flag);
147
148/* Length of buffer to create verbs txreq cache name */
149#define TXREQ_NAME_LEN 24
150
151static uint wss_threshold = 80;
152module_param(wss_threshold, uint, S_IRUGO);
153MODULE_PARM_DESC(wss_threshold, "Percentage (1-100) of LLC to use as a threshold for a cacheless copy");
154static uint wss_clean_period = 256;
155module_param(wss_clean_period, uint, S_IRUGO);
156MODULE_PARM_DESC(wss_clean_period, "Count of verbs copies before an entry in the page copy table is cleaned");
157
158/*
159 * Translate ib_wr_opcode into ib_wc_opcode.
160 */
161const enum ib_wc_opcode ib_hfi1_wc_opcode[] = {
162 [IB_WR_RDMA_WRITE] = IB_WC_RDMA_WRITE,
163 [IB_WR_TID_RDMA_WRITE] = IB_WC_RDMA_WRITE,
164 [IB_WR_RDMA_WRITE_WITH_IMM] = IB_WC_RDMA_WRITE,
165 [IB_WR_SEND] = IB_WC_SEND,
166 [IB_WR_SEND_WITH_IMM] = IB_WC_SEND,
167 [IB_WR_RDMA_READ] = IB_WC_RDMA_READ,
168 [IB_WR_TID_RDMA_READ] = IB_WC_RDMA_READ,
169 [IB_WR_ATOMIC_CMP_AND_SWP] = IB_WC_COMP_SWAP,
170 [IB_WR_ATOMIC_FETCH_AND_ADD] = IB_WC_FETCH_ADD,
171 [IB_WR_SEND_WITH_INV] = IB_WC_SEND,
172 [IB_WR_LOCAL_INV] = IB_WC_LOCAL_INV,
173 [IB_WR_REG_MR] = IB_WC_REG_MR
174};
175
176/*
177 * Length of header by opcode, 0 --> not supported
178 */
179const u8 hdr_len_by_opcode[256] = {
180 /* RC */
181 [IB_OPCODE_RC_SEND_FIRST] = 12 + 8,
182 [IB_OPCODE_RC_SEND_MIDDLE] = 12 + 8,
183 [IB_OPCODE_RC_SEND_LAST] = 12 + 8,
184 [IB_OPCODE_RC_SEND_LAST_WITH_IMMEDIATE] = 12 + 8 + 4,
185 [IB_OPCODE_RC_SEND_ONLY] = 12 + 8,
186 [IB_OPCODE_RC_SEND_ONLY_WITH_IMMEDIATE] = 12 + 8 + 4,
187 [IB_OPCODE_RC_RDMA_WRITE_FIRST] = 12 + 8 + 16,
188 [IB_OPCODE_RC_RDMA_WRITE_MIDDLE] = 12 + 8,
189 [IB_OPCODE_RC_RDMA_WRITE_LAST] = 12 + 8,
190 [IB_OPCODE_RC_RDMA_WRITE_LAST_WITH_IMMEDIATE] = 12 + 8 + 4,
191 [IB_OPCODE_RC_RDMA_WRITE_ONLY] = 12 + 8 + 16,
192 [IB_OPCODE_RC_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = 12 + 8 + 20,
193 [IB_OPCODE_RC_RDMA_READ_REQUEST] = 12 + 8 + 16,
194 [IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST] = 12 + 8 + 4,
195 [IB_OPCODE_RC_RDMA_READ_RESPONSE_MIDDLE] = 12 + 8,
196 [IB_OPCODE_RC_RDMA_READ_RESPONSE_LAST] = 12 + 8 + 4,
197 [IB_OPCODE_RC_RDMA_READ_RESPONSE_ONLY] = 12 + 8 + 4,
198 [IB_OPCODE_RC_ACKNOWLEDGE] = 12 + 8 + 4,
199 [IB_OPCODE_RC_ATOMIC_ACKNOWLEDGE] = 12 + 8 + 4 + 8,
200 [IB_OPCODE_RC_COMPARE_SWAP] = 12 + 8 + 28,
201 [IB_OPCODE_RC_FETCH_ADD] = 12 + 8 + 28,
202 [IB_OPCODE_RC_SEND_LAST_WITH_INVALIDATE] = 12 + 8 + 4,
203 [IB_OPCODE_RC_SEND_ONLY_WITH_INVALIDATE] = 12 + 8 + 4,
204 [IB_OPCODE_TID_RDMA_READ_REQ] = 12 + 8 + 36,
205 [IB_OPCODE_TID_RDMA_READ_RESP] = 12 + 8 + 36,
206 [IB_OPCODE_TID_RDMA_WRITE_REQ] = 12 + 8 + 36,
207 [IB_OPCODE_TID_RDMA_WRITE_RESP] = 12 + 8 + 36,
208 [IB_OPCODE_TID_RDMA_WRITE_DATA] = 12 + 8 + 36,
209 [IB_OPCODE_TID_RDMA_WRITE_DATA_LAST] = 12 + 8 + 36,
210 [IB_OPCODE_TID_RDMA_ACK] = 12 + 8 + 36,
211 [IB_OPCODE_TID_RDMA_RESYNC] = 12 + 8 + 36,
212 /* UC */
213 [IB_OPCODE_UC_SEND_FIRST] = 12 + 8,
214 [IB_OPCODE_UC_SEND_MIDDLE] = 12 + 8,
215 [IB_OPCODE_UC_SEND_LAST] = 12 + 8,
216 [IB_OPCODE_UC_SEND_LAST_WITH_IMMEDIATE] = 12 + 8 + 4,
217 [IB_OPCODE_UC_SEND_ONLY] = 12 + 8,
218 [IB_OPCODE_UC_SEND_ONLY_WITH_IMMEDIATE] = 12 + 8 + 4,
219 [IB_OPCODE_UC_RDMA_WRITE_FIRST] = 12 + 8 + 16,
220 [IB_OPCODE_UC_RDMA_WRITE_MIDDLE] = 12 + 8,
221 [IB_OPCODE_UC_RDMA_WRITE_LAST] = 12 + 8,
222 [IB_OPCODE_UC_RDMA_WRITE_LAST_WITH_IMMEDIATE] = 12 + 8 + 4,
223 [IB_OPCODE_UC_RDMA_WRITE_ONLY] = 12 + 8 + 16,
224 [IB_OPCODE_UC_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = 12 + 8 + 20,
225 /* UD */
226 [IB_OPCODE_UD_SEND_ONLY] = 12 + 8 + 8,
227 [IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE] = 12 + 8 + 12
228};
229
230static const opcode_handler opcode_handler_tbl[256] = {
231 /* RC */
232 [IB_OPCODE_RC_SEND_FIRST] = &hfi1_rc_rcv,
233 [IB_OPCODE_RC_SEND_MIDDLE] = &hfi1_rc_rcv,
234 [IB_OPCODE_RC_SEND_LAST] = &hfi1_rc_rcv,
235 [IB_OPCODE_RC_SEND_LAST_WITH_IMMEDIATE] = &hfi1_rc_rcv,
236 [IB_OPCODE_RC_SEND_ONLY] = &hfi1_rc_rcv,
237 [IB_OPCODE_RC_SEND_ONLY_WITH_IMMEDIATE] = &hfi1_rc_rcv,
238 [IB_OPCODE_RC_RDMA_WRITE_FIRST] = &hfi1_rc_rcv,
239 [IB_OPCODE_RC_RDMA_WRITE_MIDDLE] = &hfi1_rc_rcv,
240 [IB_OPCODE_RC_RDMA_WRITE_LAST] = &hfi1_rc_rcv,
241 [IB_OPCODE_RC_RDMA_WRITE_LAST_WITH_IMMEDIATE] = &hfi1_rc_rcv,
242 [IB_OPCODE_RC_RDMA_WRITE_ONLY] = &hfi1_rc_rcv,
243 [IB_OPCODE_RC_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = &hfi1_rc_rcv,
244 [IB_OPCODE_RC_RDMA_READ_REQUEST] = &hfi1_rc_rcv,
245 [IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST] = &hfi1_rc_rcv,
246 [IB_OPCODE_RC_RDMA_READ_RESPONSE_MIDDLE] = &hfi1_rc_rcv,
247 [IB_OPCODE_RC_RDMA_READ_RESPONSE_LAST] = &hfi1_rc_rcv,
248 [IB_OPCODE_RC_RDMA_READ_RESPONSE_ONLY] = &hfi1_rc_rcv,
249 [IB_OPCODE_RC_ACKNOWLEDGE] = &hfi1_rc_rcv,
250 [IB_OPCODE_RC_ATOMIC_ACKNOWLEDGE] = &hfi1_rc_rcv,
251 [IB_OPCODE_RC_COMPARE_SWAP] = &hfi1_rc_rcv,
252 [IB_OPCODE_RC_FETCH_ADD] = &hfi1_rc_rcv,
253 [IB_OPCODE_RC_SEND_LAST_WITH_INVALIDATE] = &hfi1_rc_rcv,
254 [IB_OPCODE_RC_SEND_ONLY_WITH_INVALIDATE] = &hfi1_rc_rcv,
255
256 /* TID RDMA has separate handlers for different opcodes.*/
257 [IB_OPCODE_TID_RDMA_WRITE_REQ] = &hfi1_rc_rcv_tid_rdma_write_req,
258 [IB_OPCODE_TID_RDMA_WRITE_RESP] = &hfi1_rc_rcv_tid_rdma_write_resp,
259 [IB_OPCODE_TID_RDMA_WRITE_DATA] = &hfi1_rc_rcv_tid_rdma_write_data,
260 [IB_OPCODE_TID_RDMA_WRITE_DATA_LAST] = &hfi1_rc_rcv_tid_rdma_write_data,
261 [IB_OPCODE_TID_RDMA_READ_REQ] = &hfi1_rc_rcv_tid_rdma_read_req,
262 [IB_OPCODE_TID_RDMA_READ_RESP] = &hfi1_rc_rcv_tid_rdma_read_resp,
263 [IB_OPCODE_TID_RDMA_RESYNC] = &hfi1_rc_rcv_tid_rdma_resync,
264 [IB_OPCODE_TID_RDMA_ACK] = &hfi1_rc_rcv_tid_rdma_ack,
265
266 /* UC */
267 [IB_OPCODE_UC_SEND_FIRST] = &hfi1_uc_rcv,
268 [IB_OPCODE_UC_SEND_MIDDLE] = &hfi1_uc_rcv,
269 [IB_OPCODE_UC_SEND_LAST] = &hfi1_uc_rcv,
270 [IB_OPCODE_UC_SEND_LAST_WITH_IMMEDIATE] = &hfi1_uc_rcv,
271 [IB_OPCODE_UC_SEND_ONLY] = &hfi1_uc_rcv,
272 [IB_OPCODE_UC_SEND_ONLY_WITH_IMMEDIATE] = &hfi1_uc_rcv,
273 [IB_OPCODE_UC_RDMA_WRITE_FIRST] = &hfi1_uc_rcv,
274 [IB_OPCODE_UC_RDMA_WRITE_MIDDLE] = &hfi1_uc_rcv,
275 [IB_OPCODE_UC_RDMA_WRITE_LAST] = &hfi1_uc_rcv,
276 [IB_OPCODE_UC_RDMA_WRITE_LAST_WITH_IMMEDIATE] = &hfi1_uc_rcv,
277 [IB_OPCODE_UC_RDMA_WRITE_ONLY] = &hfi1_uc_rcv,
278 [IB_OPCODE_UC_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = &hfi1_uc_rcv,
279 /* UD */
280 [IB_OPCODE_UD_SEND_ONLY] = &hfi1_ud_rcv,
281 [IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE] = &hfi1_ud_rcv,
282 /* CNP */
283 [IB_OPCODE_CNP] = &hfi1_cnp_rcv
284};
285
286#define OPMASK 0x1f
287
288static const u32 pio_opmask[BIT(3)] = {
289 /* RC */
290 [IB_OPCODE_RC >> 5] =
291 BIT(RC_OP(SEND_ONLY) & OPMASK) |
292 BIT(RC_OP(SEND_ONLY_WITH_IMMEDIATE) & OPMASK) |
293 BIT(RC_OP(RDMA_WRITE_ONLY) & OPMASK) |
294 BIT(RC_OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE) & OPMASK) |
295 BIT(RC_OP(RDMA_READ_REQUEST) & OPMASK) |
296 BIT(RC_OP(ACKNOWLEDGE) & OPMASK) |
297 BIT(RC_OP(ATOMIC_ACKNOWLEDGE) & OPMASK) |
298 BIT(RC_OP(COMPARE_SWAP) & OPMASK) |
299 BIT(RC_OP(FETCH_ADD) & OPMASK),
300 /* UC */
301 [IB_OPCODE_UC >> 5] =
302 BIT(UC_OP(SEND_ONLY) & OPMASK) |
303 BIT(UC_OP(SEND_ONLY_WITH_IMMEDIATE) & OPMASK) |
304 BIT(UC_OP(RDMA_WRITE_ONLY) & OPMASK) |
305 BIT(UC_OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE) & OPMASK),
306};
307
308/*
309 * System image GUID.
310 */
311__be64 ib_hfi1_sys_image_guid;
312
313/*
314 * Make sure the QP is ready and able to accept the given opcode.
315 */
316static inline opcode_handler qp_ok(struct hfi1_packet *packet)
317{
318 if (!(ib_rvt_state_ops[packet->qp->state] & RVT_PROCESS_RECV_OK))
319 return NULL;
320 if (((packet->opcode & RVT_OPCODE_QP_MASK) ==
321 packet->qp->allowed_ops) ||
322 (packet->opcode == IB_OPCODE_CNP))
323 return opcode_handler_tbl[packet->opcode];
324
325 return NULL;
326}
327
328static u64 hfi1_fault_tx(struct rvt_qp *qp, u8 opcode, u64 pbc)
329{
330#ifdef CONFIG_FAULT_INJECTION
331 if ((opcode & IB_OPCODE_MSP) == IB_OPCODE_MSP) {
332 /*
333 * In order to drop non-IB traffic we
334 * set PbcInsertHrc to NONE (0x2).
335 * The packet will still be delivered
336 * to the receiving node but a
337 * KHdrHCRCErr (KDETH packet with a bad
338 * HCRC) will be triggered and the
339 * packet will not be delivered to the
340 * correct context.
341 */
342 pbc &= ~PBC_INSERT_HCRC_SMASK;
343 pbc |= (u64)PBC_IHCRC_NONE << PBC_INSERT_HCRC_SHIFT;
344 } else {
345 /*
346 * In order to drop regular verbs
347 * traffic we set the PbcTestEbp
348 * flag. The packet will still be
349 * delivered to the receiving node but
350 * a 'late ebp error' will be
351 * triggered and will be dropped.
352 */
353 pbc |= PBC_TEST_EBP;
354 }
355#endif
356 return pbc;
357}
358
359static opcode_handler tid_qp_ok(int opcode, struct hfi1_packet *packet)
360{
361 if (packet->qp->ibqp.qp_type != IB_QPT_RC ||
362 !(ib_rvt_state_ops[packet->qp->state] & RVT_PROCESS_RECV_OK))
363 return NULL;
364 if ((opcode & RVT_OPCODE_QP_MASK) == IB_OPCODE_TID_RDMA)
365 return opcode_handler_tbl[opcode];
366 return NULL;
367}
368
369void hfi1_kdeth_eager_rcv(struct hfi1_packet *packet)
370{
371 struct hfi1_ctxtdata *rcd = packet->rcd;
372 struct ib_header *hdr = packet->hdr;
373 u32 tlen = packet->tlen;
374 struct hfi1_pportdata *ppd = rcd->ppd;
375 struct hfi1_ibport *ibp = &ppd->ibport_data;
376 struct rvt_dev_info *rdi = &ppd->dd->verbs_dev.rdi;
377 opcode_handler opcode_handler;
378 unsigned long flags;
379 u32 qp_num;
380 int lnh;
381 u8 opcode;
382
383 /* DW == LRH (2) + BTH (3) + KDETH (9) + CRC (1) */
384 if (unlikely(tlen < 15 * sizeof(u32)))
385 goto drop;
386
387 lnh = be16_to_cpu(hdr->lrh[0]) & 3;
388 if (lnh != HFI1_LRH_BTH)
389 goto drop;
390
391 packet->ohdr = &hdr->u.oth;
392 trace_input_ibhdr(rcd->dd, packet, !!(rhf_dc_info(packet->rhf)));
393
394 opcode = (be32_to_cpu(packet->ohdr->bth[0]) >> 24);
395 inc_opstats(tlen, &rcd->opstats->stats[opcode]);
396
397 /* verbs_qp can be picked up from any tid_rdma header struct */
398 qp_num = be32_to_cpu(packet->ohdr->u.tid_rdma.r_req.verbs_qp) &
399 RVT_QPN_MASK;
400
401 rcu_read_lock();
402 packet->qp = rvt_lookup_qpn(rdi, &ibp->rvp, qp_num);
403 if (!packet->qp)
404 goto drop_rcu;
405 spin_lock_irqsave(&packet->qp->r_lock, flags);
406 opcode_handler = tid_qp_ok(opcode, packet);
407 if (likely(opcode_handler))
408 opcode_handler(packet);
409 else
410 goto drop_unlock;
411 spin_unlock_irqrestore(&packet->qp->r_lock, flags);
412 rcu_read_unlock();
413
414 return;
415drop_unlock:
416 spin_unlock_irqrestore(&packet->qp->r_lock, flags);
417drop_rcu:
418 rcu_read_unlock();
419drop:
420 ibp->rvp.n_pkt_drops++;
421}
422
423void hfi1_kdeth_expected_rcv(struct hfi1_packet *packet)
424{
425 struct hfi1_ctxtdata *rcd = packet->rcd;
426 struct ib_header *hdr = packet->hdr;
427 u32 tlen = packet->tlen;
428 struct hfi1_pportdata *ppd = rcd->ppd;
429 struct hfi1_ibport *ibp = &ppd->ibport_data;
430 struct rvt_dev_info *rdi = &ppd->dd->verbs_dev.rdi;
431 opcode_handler opcode_handler;
432 unsigned long flags;
433 u32 qp_num;
434 int lnh;
435 u8 opcode;
436
437 /* DW == LRH (2) + BTH (3) + KDETH (9) + CRC (1) */
438 if (unlikely(tlen < 15 * sizeof(u32)))
439 goto drop;
440
441 lnh = be16_to_cpu(hdr->lrh[0]) & 3;
442 if (lnh != HFI1_LRH_BTH)
443 goto drop;
444
445 packet->ohdr = &hdr->u.oth;
446 trace_input_ibhdr(rcd->dd, packet, !!(rhf_dc_info(packet->rhf)));
447
448 opcode = (be32_to_cpu(packet->ohdr->bth[0]) >> 24);
449 inc_opstats(tlen, &rcd->opstats->stats[opcode]);
450
451 /* verbs_qp can be picked up from any tid_rdma header struct */
452 qp_num = be32_to_cpu(packet->ohdr->u.tid_rdma.r_rsp.verbs_qp) &
453 RVT_QPN_MASK;
454
455 rcu_read_lock();
456 packet->qp = rvt_lookup_qpn(rdi, &ibp->rvp, qp_num);
457 if (!packet->qp)
458 goto drop_rcu;
459 spin_lock_irqsave(&packet->qp->r_lock, flags);
460 opcode_handler = tid_qp_ok(opcode, packet);
461 if (likely(opcode_handler))
462 opcode_handler(packet);
463 else
464 goto drop_unlock;
465 spin_unlock_irqrestore(&packet->qp->r_lock, flags);
466 rcu_read_unlock();
467
468 return;
469drop_unlock:
470 spin_unlock_irqrestore(&packet->qp->r_lock, flags);
471drop_rcu:
472 rcu_read_unlock();
473drop:
474 ibp->rvp.n_pkt_drops++;
475}
476
477static int hfi1_do_pkey_check(struct hfi1_packet *packet)
478{
479 struct hfi1_ctxtdata *rcd = packet->rcd;
480 struct hfi1_pportdata *ppd = rcd->ppd;
481 struct hfi1_16b_header *hdr = packet->hdr;
482 u16 pkey;
483
484 /* Pkey check needed only for bypass packets */
485 if (packet->etype != RHF_RCV_TYPE_BYPASS)
486 return 0;
487
488 /* Perform pkey check */
489 pkey = hfi1_16B_get_pkey(hdr);
490 return ingress_pkey_check(ppd, pkey, packet->sc,
491 packet->qp->s_pkey_index,
492 packet->slid, true);
493}
494
495static inline void hfi1_handle_packet(struct hfi1_packet *packet,
496 bool is_mcast)
497{
498 u32 qp_num;
499 struct hfi1_ctxtdata *rcd = packet->rcd;
500 struct hfi1_pportdata *ppd = rcd->ppd;
501 struct hfi1_ibport *ibp = rcd_to_iport(rcd);
502 struct rvt_dev_info *rdi = &ppd->dd->verbs_dev.rdi;
503 opcode_handler packet_handler;
504 unsigned long flags;
505
506 inc_opstats(packet->tlen, &rcd->opstats->stats[packet->opcode]);
507
508 if (unlikely(is_mcast)) {
509 struct rvt_mcast *mcast;
510 struct rvt_mcast_qp *p;
511
512 if (!packet->grh)
513 goto drop;
514 mcast = rvt_mcast_find(&ibp->rvp,
515 &packet->grh->dgid,
516 opa_get_lid(packet->dlid, 9B));
517 if (!mcast)
518 goto drop;
519 rcu_read_lock();
520 list_for_each_entry_rcu(p, &mcast->qp_list, list) {
521 packet->qp = p->qp;
522 if (hfi1_do_pkey_check(packet))
523 goto unlock_drop;
524 spin_lock_irqsave(&packet->qp->r_lock, flags);
525 packet_handler = qp_ok(packet);
526 if (likely(packet_handler))
527 packet_handler(packet);
528 else
529 ibp->rvp.n_pkt_drops++;
530 spin_unlock_irqrestore(&packet->qp->r_lock, flags);
531 }
532 rcu_read_unlock();
533 /*
534 * Notify rvt_multicast_detach() if it is waiting for us
535 * to finish.
536 */
537 if (atomic_dec_return(&mcast->refcount) <= 1)
538 wake_up(&mcast->wait);
539 } else {
540 /* Get the destination QP number. */
541 if (packet->etype == RHF_RCV_TYPE_BYPASS &&
542 hfi1_16B_get_l4(packet->hdr) == OPA_16B_L4_FM)
543 qp_num = hfi1_16B_get_dest_qpn(packet->mgmt);
544 else
545 qp_num = ib_bth_get_qpn(packet->ohdr);
546
547 rcu_read_lock();
548 packet->qp = rvt_lookup_qpn(rdi, &ibp->rvp, qp_num);
549 if (!packet->qp)
550 goto unlock_drop;
551
552 if (hfi1_do_pkey_check(packet))
553 goto unlock_drop;
554
555 spin_lock_irqsave(&packet->qp->r_lock, flags);
556 packet_handler = qp_ok(packet);
557 if (likely(packet_handler))
558 packet_handler(packet);
559 else
560 ibp->rvp.n_pkt_drops++;
561 spin_unlock_irqrestore(&packet->qp->r_lock, flags);
562 rcu_read_unlock();
563 }
564 return;
565unlock_drop:
566 rcu_read_unlock();
567drop:
568 ibp->rvp.n_pkt_drops++;
569}
570
571/**
572 * hfi1_ib_rcv - process an incoming packet
573 * @packet: data packet information
574 *
575 * This is called to process an incoming packet at interrupt level.
576 */
577void hfi1_ib_rcv(struct hfi1_packet *packet)
578{
579 struct hfi1_ctxtdata *rcd = packet->rcd;
580
581 trace_input_ibhdr(rcd->dd, packet, !!(rhf_dc_info(packet->rhf)));
582 hfi1_handle_packet(packet, hfi1_check_mcast(packet->dlid));
583}
584
585void hfi1_16B_rcv(struct hfi1_packet *packet)
586{
587 struct hfi1_ctxtdata *rcd = packet->rcd;
588
589 trace_input_ibhdr(rcd->dd, packet, false);
590 hfi1_handle_packet(packet, hfi1_check_mcast(packet->dlid));
591}
592
593/*
594 * This is called from a timer to check for QPs
595 * which need kernel memory in order to send a packet.
596 */
597static void mem_timer(struct timer_list *t)
598{
599 struct hfi1_ibdev *dev = from_timer(dev, t, mem_timer);
600 struct list_head *list = &dev->memwait;
601 struct rvt_qp *qp = NULL;
602 struct iowait *wait;
603 unsigned long flags;
604 struct hfi1_qp_priv *priv;
605
606 write_seqlock_irqsave(&dev->iowait_lock, flags);
607 if (!list_empty(list)) {
608 wait = list_first_entry(list, struct iowait, list);
609 qp = iowait_to_qp(wait);
610 priv = qp->priv;
611 list_del_init(&priv->s_iowait.list);
612 priv->s_iowait.lock = NULL;
613 /* refcount held until actual wake up */
614 if (!list_empty(list))
615 mod_timer(&dev->mem_timer, jiffies + 1);
616 }
617 write_sequnlock_irqrestore(&dev->iowait_lock, flags);
618
619 if (qp)
620 hfi1_qp_wakeup(qp, RVT_S_WAIT_KMEM);
621}
622
623/*
624 * This is called with progress side lock held.
625 */
626/* New API */
627static void verbs_sdma_complete(
628 struct sdma_txreq *cookie,
629 int status)
630{
631 struct verbs_txreq *tx =
632 container_of(cookie, struct verbs_txreq, txreq);
633 struct rvt_qp *qp = tx->qp;
634
635 spin_lock(&qp->s_lock);
636 if (tx->wqe) {
637 rvt_send_complete(qp, tx->wqe, IB_WC_SUCCESS);
638 } else if (qp->ibqp.qp_type == IB_QPT_RC) {
639 struct hfi1_opa_header *hdr;
640
641 hdr = &tx->phdr.hdr;
642 if (unlikely(status == SDMA_TXREQ_S_ABORTED))
643 hfi1_rc_verbs_aborted(qp, hdr);
644 hfi1_rc_send_complete(qp, hdr);
645 }
646 spin_unlock(&qp->s_lock);
647
648 hfi1_put_txreq(tx);
649}
650
651void hfi1_wait_kmem(struct rvt_qp *qp)
652{
653 struct hfi1_qp_priv *priv = qp->priv;
654 struct ib_qp *ibqp = &qp->ibqp;
655 struct ib_device *ibdev = ibqp->device;
656 struct hfi1_ibdev *dev = to_idev(ibdev);
657
658 if (list_empty(&priv->s_iowait.list)) {
659 if (list_empty(&dev->memwait))
660 mod_timer(&dev->mem_timer, jiffies + 1);
661 qp->s_flags |= RVT_S_WAIT_KMEM;
662 list_add_tail(&priv->s_iowait.list, &dev->memwait);
663 priv->s_iowait.lock = &dev->iowait_lock;
664 trace_hfi1_qpsleep(qp, RVT_S_WAIT_KMEM);
665 rvt_get_qp(qp);
666 }
667}
668
669static int wait_kmem(struct hfi1_ibdev *dev,
670 struct rvt_qp *qp,
671 struct hfi1_pkt_state *ps)
672{
673 unsigned long flags;
674 int ret = 0;
675
676 spin_lock_irqsave(&qp->s_lock, flags);
677 if (ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK) {
678 write_seqlock(&dev->iowait_lock);
679 list_add_tail(&ps->s_txreq->txreq.list,
680 &ps->wait->tx_head);
681 hfi1_wait_kmem(qp);
682 write_sequnlock(&dev->iowait_lock);
683 hfi1_qp_unbusy(qp, ps->wait);
684 ret = -EBUSY;
685 }
686 spin_unlock_irqrestore(&qp->s_lock, flags);
687
688 return ret;
689}
690
691/*
692 * This routine calls txadds for each sg entry.
693 *
694 * Add failures will revert the sge cursor
695 */
696static noinline int build_verbs_ulp_payload(
697 struct sdma_engine *sde,
698 u32 length,
699 struct verbs_txreq *tx)
700{
701 struct rvt_sge_state *ss = tx->ss;
702 struct rvt_sge *sg_list = ss->sg_list;
703 struct rvt_sge sge = ss->sge;
704 u8 num_sge = ss->num_sge;
705 u32 len;
706 int ret = 0;
707
708 while (length) {
709 len = rvt_get_sge_length(&ss->sge, length);
710 WARN_ON_ONCE(len == 0);
711 ret = sdma_txadd_kvaddr(
712 sde->dd,
713 &tx->txreq,
714 ss->sge.vaddr,
715 len);
716 if (ret)
717 goto bail_txadd;
718 rvt_update_sge(ss, len, false);
719 length -= len;
720 }
721 return ret;
722bail_txadd:
723 /* unwind cursor */
724 ss->sge = sge;
725 ss->num_sge = num_sge;
726 ss->sg_list = sg_list;
727 return ret;
728}
729
730/**
731 * update_tx_opstats - record stats by opcode
732 * @qp: the qp
733 * @ps: transmit packet state
734 * @plen: the plen in dwords
735 *
736 * This is a routine to record the tx opstats after a
737 * packet has been presented to the egress mechanism.
738 */
739static void update_tx_opstats(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
740 u32 plen)
741{
742#ifdef CONFIG_DEBUG_FS
743 struct hfi1_devdata *dd = dd_from_ibdev(qp->ibqp.device);
744 struct hfi1_opcode_stats_perctx *s = get_cpu_ptr(dd->tx_opstats);
745
746 inc_opstats(plen * 4, &s->stats[ps->opcode]);
747 put_cpu_ptr(s);
748#endif
749}
750
751/*
752 * Build the number of DMA descriptors needed to send length bytes of data.
753 *
754 * NOTE: DMA mapping is held in the tx until completed in the ring or
755 * the tx desc is freed without having been submitted to the ring
756 *
757 * This routine ensures all the helper routine calls succeed.
758 */
759/* New API */
760static int build_verbs_tx_desc(
761 struct sdma_engine *sde,
762 u32 length,
763 struct verbs_txreq *tx,
764 struct hfi1_ahg_info *ahg_info,
765 u64 pbc)
766{
767 int ret = 0;
768 struct hfi1_sdma_header *phdr = &tx->phdr;
769 u16 hdrbytes = (tx->hdr_dwords + sizeof(pbc) / 4) << 2;
770 u8 extra_bytes = 0;
771
772 if (tx->phdr.hdr.hdr_type) {
773 /*
774 * hdrbytes accounts for PBC. Need to subtract 8 bytes
775 * before calculating padding.
776 */
777 extra_bytes = hfi1_get_16b_padding(hdrbytes - 8, length) +
778 (SIZE_OF_CRC << 2) + SIZE_OF_LT;
779 }
780 if (!ahg_info->ahgcount) {
781 ret = sdma_txinit_ahg(
782 &tx->txreq,
783 ahg_info->tx_flags,
784 hdrbytes + length +
785 extra_bytes,
786 ahg_info->ahgidx,
787 0,
788 NULL,
789 0,
790 verbs_sdma_complete);
791 if (ret)
792 goto bail_txadd;
793 phdr->pbc = cpu_to_le64(pbc);
794 ret = sdma_txadd_kvaddr(
795 sde->dd,
796 &tx->txreq,
797 phdr,
798 hdrbytes);
799 if (ret)
800 goto bail_txadd;
801 } else {
802 ret = sdma_txinit_ahg(
803 &tx->txreq,
804 ahg_info->tx_flags,
805 length,
806 ahg_info->ahgidx,
807 ahg_info->ahgcount,
808 ahg_info->ahgdesc,
809 hdrbytes,
810 verbs_sdma_complete);
811 if (ret)
812 goto bail_txadd;
813 }
814 /* add the ulp payload - if any. tx->ss can be NULL for acks */
815 if (tx->ss) {
816 ret = build_verbs_ulp_payload(sde, length, tx);
817 if (ret)
818 goto bail_txadd;
819 }
820
821 /* add icrc, lt byte, and padding to flit */
822 if (extra_bytes)
823 ret = sdma_txadd_daddr(sde->dd, &tx->txreq,
824 sde->dd->sdma_pad_phys, extra_bytes);
825
826bail_txadd:
827 return ret;
828}
829
830static u64 update_hcrc(u8 opcode, u64 pbc)
831{
832 if ((opcode & IB_OPCODE_TID_RDMA) == IB_OPCODE_TID_RDMA) {
833 pbc &= ~PBC_INSERT_HCRC_SMASK;
834 pbc |= (u64)PBC_IHCRC_LKDETH << PBC_INSERT_HCRC_SHIFT;
835 }
836 return pbc;
837}
838
839int hfi1_verbs_send_dma(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
840 u64 pbc)
841{
842 struct hfi1_qp_priv *priv = qp->priv;
843 struct hfi1_ahg_info *ahg_info = priv->s_ahg;
844 u32 hdrwords = ps->s_txreq->hdr_dwords;
845 u32 len = ps->s_txreq->s_cur_size;
846 u32 plen;
847 struct hfi1_ibdev *dev = ps->dev;
848 struct hfi1_pportdata *ppd = ps->ppd;
849 struct verbs_txreq *tx;
850 u8 sc5 = priv->s_sc;
851 int ret;
852 u32 dwords;
853
854 if (ps->s_txreq->phdr.hdr.hdr_type) {
855 u8 extra_bytes = hfi1_get_16b_padding((hdrwords << 2), len);
856
857 dwords = (len + extra_bytes + (SIZE_OF_CRC << 2) +
858 SIZE_OF_LT) >> 2;
859 } else {
860 dwords = (len + 3) >> 2;
861 }
862 plen = hdrwords + dwords + sizeof(pbc) / 4;
863
864 tx = ps->s_txreq;
865 if (!sdma_txreq_built(&tx->txreq)) {
866 if (likely(pbc == 0)) {
867 u32 vl = sc_to_vlt(dd_from_ibdev(qp->ibqp.device), sc5);
868
869 /* No vl15 here */
870 /* set PBC_DC_INFO bit (aka SC[4]) in pbc */
871 if (ps->s_txreq->phdr.hdr.hdr_type)
872 pbc |= PBC_PACKET_BYPASS |
873 PBC_INSERT_BYPASS_ICRC;
874 else
875 pbc |= (ib_is_sc5(sc5) << PBC_DC_INFO_SHIFT);
876
877 pbc = create_pbc(ppd,
878 pbc,
879 qp->srate_mbps,
880 vl,
881 plen);
882
883 if (unlikely(hfi1_dbg_should_fault_tx(qp, ps->opcode)))
884 pbc = hfi1_fault_tx(qp, ps->opcode, pbc);
885 else
886 /* Update HCRC based on packet opcode */
887 pbc = update_hcrc(ps->opcode, pbc);
888 }
889 tx->wqe = qp->s_wqe;
890 ret = build_verbs_tx_desc(tx->sde, len, tx, ahg_info, pbc);
891 if (unlikely(ret))
892 goto bail_build;
893 }
894 ret = sdma_send_txreq(tx->sde, ps->wait, &tx->txreq, ps->pkts_sent);
895 if (unlikely(ret < 0)) {
896 if (ret == -ECOMM)
897 goto bail_ecomm;
898 return ret;
899 }
900
901 update_tx_opstats(qp, ps, plen);
902 trace_sdma_output_ibhdr(dd_from_ibdev(qp->ibqp.device),
903 &ps->s_txreq->phdr.hdr, ib_is_sc5(sc5));
904 return ret;
905
906bail_ecomm:
907 /* The current one got "sent" */
908 return 0;
909bail_build:
910 ret = wait_kmem(dev, qp, ps);
911 if (!ret) {
912 /* free txreq - bad state */
913 hfi1_put_txreq(ps->s_txreq);
914 ps->s_txreq = NULL;
915 }
916 return ret;
917}
918
919/*
920 * If we are now in the error state, return zero to flush the
921 * send work request.
922 */
923static int pio_wait(struct rvt_qp *qp,
924 struct send_context *sc,
925 struct hfi1_pkt_state *ps,
926 u32 flag)
927{
928 struct hfi1_qp_priv *priv = qp->priv;
929 struct hfi1_devdata *dd = sc->dd;
930 unsigned long flags;
931 int ret = 0;
932
933 /*
934 * Note that as soon as want_buffer() is called and
935 * possibly before it returns, sc_piobufavail()
936 * could be called. Therefore, put QP on the I/O wait list before
937 * enabling the PIO avail interrupt.
938 */
939 spin_lock_irqsave(&qp->s_lock, flags);
940 if (ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK) {
941 write_seqlock(&sc->waitlock);
942 list_add_tail(&ps->s_txreq->txreq.list,
943 &ps->wait->tx_head);
944 if (list_empty(&priv->s_iowait.list)) {
945 struct hfi1_ibdev *dev = &dd->verbs_dev;
946 int was_empty;
947
948 dev->n_piowait += !!(flag & RVT_S_WAIT_PIO);
949 dev->n_piodrain += !!(flag & HFI1_S_WAIT_PIO_DRAIN);
950 qp->s_flags |= flag;
951 was_empty = list_empty(&sc->piowait);
952 iowait_get_priority(&priv->s_iowait);
953 iowait_queue(ps->pkts_sent, &priv->s_iowait,
954 &sc->piowait);
955 priv->s_iowait.lock = &sc->waitlock;
956 trace_hfi1_qpsleep(qp, RVT_S_WAIT_PIO);
957 rvt_get_qp(qp);
958 /* counting: only call wantpiobuf_intr if first user */
959 if (was_empty)
960 hfi1_sc_wantpiobuf_intr(sc, 1);
961 }
962 write_sequnlock(&sc->waitlock);
963 hfi1_qp_unbusy(qp, ps->wait);
964 ret = -EBUSY;
965 }
966 spin_unlock_irqrestore(&qp->s_lock, flags);
967 return ret;
968}
969
970static void verbs_pio_complete(void *arg, int code)
971{
972 struct rvt_qp *qp = (struct rvt_qp *)arg;
973 struct hfi1_qp_priv *priv = qp->priv;
974
975 if (iowait_pio_dec(&priv->s_iowait))
976 iowait_drain_wakeup(&priv->s_iowait);
977}
978
979int hfi1_verbs_send_pio(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
980 u64 pbc)
981{
982 struct hfi1_qp_priv *priv = qp->priv;
983 u32 hdrwords = ps->s_txreq->hdr_dwords;
984 struct rvt_sge_state *ss = ps->s_txreq->ss;
985 u32 len = ps->s_txreq->s_cur_size;
986 u32 dwords;
987 u32 plen;
988 struct hfi1_pportdata *ppd = ps->ppd;
989 u32 *hdr;
990 u8 sc5;
991 unsigned long flags = 0;
992 struct send_context *sc;
993 struct pio_buf *pbuf;
994 int wc_status = IB_WC_SUCCESS;
995 int ret = 0;
996 pio_release_cb cb = NULL;
997 u8 extra_bytes = 0;
998
999 if (ps->s_txreq->phdr.hdr.hdr_type) {
1000 u8 pad_size = hfi1_get_16b_padding((hdrwords << 2), len);
1001
1002 extra_bytes = pad_size + (SIZE_OF_CRC << 2) + SIZE_OF_LT;
1003 dwords = (len + extra_bytes) >> 2;
1004 hdr = (u32 *)&ps->s_txreq->phdr.hdr.opah;
1005 } else {
1006 dwords = (len + 3) >> 2;
1007 hdr = (u32 *)&ps->s_txreq->phdr.hdr.ibh;
1008 }
1009 plen = hdrwords + dwords + sizeof(pbc) / 4;
1010
1011 /* only RC/UC use complete */
1012 switch (qp->ibqp.qp_type) {
1013 case IB_QPT_RC:
1014 case IB_QPT_UC:
1015 cb = verbs_pio_complete;
1016 break;
1017 default:
1018 break;
1019 }
1020
1021 /* vl15 special case taken care of in ud.c */
1022 sc5 = priv->s_sc;
1023 sc = ps->s_txreq->psc;
1024
1025 if (likely(pbc == 0)) {
1026 u8 vl = sc_to_vlt(dd_from_ibdev(qp->ibqp.device), sc5);
1027
1028 /* set PBC_DC_INFO bit (aka SC[4]) in pbc */
1029 if (ps->s_txreq->phdr.hdr.hdr_type)
1030 pbc |= PBC_PACKET_BYPASS | PBC_INSERT_BYPASS_ICRC;
1031 else
1032 pbc |= (ib_is_sc5(sc5) << PBC_DC_INFO_SHIFT);
1033
1034 pbc = create_pbc(ppd, pbc, qp->srate_mbps, vl, plen);
1035 if (unlikely(hfi1_dbg_should_fault_tx(qp, ps->opcode)))
1036 pbc = hfi1_fault_tx(qp, ps->opcode, pbc);
1037 else
1038 /* Update HCRC based on packet opcode */
1039 pbc = update_hcrc(ps->opcode, pbc);
1040 }
1041 if (cb)
1042 iowait_pio_inc(&priv->s_iowait);
1043 pbuf = sc_buffer_alloc(sc, plen, cb, qp);
1044 if (IS_ERR_OR_NULL(pbuf)) {
1045 if (cb)
1046 verbs_pio_complete(qp, 0);
1047 if (IS_ERR(pbuf)) {
1048 /*
1049 * If we have filled the PIO buffers to capacity and are
1050 * not in an active state this request is not going to
1051 * go out to so just complete it with an error or else a
1052 * ULP or the core may be stuck waiting.
1053 */
1054 hfi1_cdbg(
1055 PIO,
1056 "alloc failed. state not active, completing");
1057 wc_status = IB_WC_GENERAL_ERR;
1058 goto pio_bail;
1059 } else {
1060 /*
1061 * This is a normal occurrence. The PIO buffs are full
1062 * up but we are still happily sending, well we could be
1063 * so lets continue to queue the request.
1064 */
1065 hfi1_cdbg(PIO, "alloc failed. state active, queuing");
1066 ret = pio_wait(qp, sc, ps, RVT_S_WAIT_PIO);
1067 if (!ret)
1068 /* txreq not queued - free */
1069 goto bail;
1070 /* tx consumed in wait */
1071 return ret;
1072 }
1073 }
1074
1075 if (dwords == 0) {
1076 pio_copy(ppd->dd, pbuf, pbc, hdr, hdrwords);
1077 } else {
1078 seg_pio_copy_start(pbuf, pbc,
1079 hdr, hdrwords * 4);
1080 if (ss) {
1081 while (len) {
1082 void *addr = ss->sge.vaddr;
1083 u32 slen = rvt_get_sge_length(&ss->sge, len);
1084
1085 rvt_update_sge(ss, slen, false);
1086 seg_pio_copy_mid(pbuf, addr, slen);
1087 len -= slen;
1088 }
1089 }
1090 /* add icrc, lt byte, and padding to flit */
1091 if (extra_bytes)
1092 seg_pio_copy_mid(pbuf, ppd->dd->sdma_pad_dma,
1093 extra_bytes);
1094
1095 seg_pio_copy_end(pbuf);
1096 }
1097
1098 update_tx_opstats(qp, ps, plen);
1099 trace_pio_output_ibhdr(dd_from_ibdev(qp->ibqp.device),
1100 &ps->s_txreq->phdr.hdr, ib_is_sc5(sc5));
1101
1102pio_bail:
1103 spin_lock_irqsave(&qp->s_lock, flags);
1104 if (qp->s_wqe) {
1105 rvt_send_complete(qp, qp->s_wqe, wc_status);
1106 } else if (qp->ibqp.qp_type == IB_QPT_RC) {
1107 if (unlikely(wc_status == IB_WC_GENERAL_ERR))
1108 hfi1_rc_verbs_aborted(qp, &ps->s_txreq->phdr.hdr);
1109 hfi1_rc_send_complete(qp, &ps->s_txreq->phdr.hdr);
1110 }
1111 spin_unlock_irqrestore(&qp->s_lock, flags);
1112
1113 ret = 0;
1114
1115bail:
1116 hfi1_put_txreq(ps->s_txreq);
1117 return ret;
1118}
1119
1120/*
1121 * egress_pkey_matches_entry - return 1 if the pkey matches ent (ent
1122 * being an entry from the partition key table), return 0
1123 * otherwise. Use the matching criteria for egress partition keys
1124 * specified in the OPAv1 spec., section 9.1l.7.
1125 */
1126static inline int egress_pkey_matches_entry(u16 pkey, u16 ent)
1127{
1128 u16 mkey = pkey & PKEY_LOW_15_MASK;
1129 u16 mentry = ent & PKEY_LOW_15_MASK;
1130
1131 if (mkey == mentry) {
1132 /*
1133 * If pkey[15] is set (full partition member),
1134 * is bit 15 in the corresponding table element
1135 * clear (limited member)?
1136 */
1137 if (pkey & PKEY_MEMBER_MASK)
1138 return !!(ent & PKEY_MEMBER_MASK);
1139 return 1;
1140 }
1141 return 0;
1142}
1143
1144/**
1145 * egress_pkey_check - check P_KEY of a packet
1146 * @ppd: Physical IB port data
1147 * @slid: SLID for packet
1148 * @pkey: PKEY for header
1149 * @sc5: SC for packet
1150 * @s_pkey_index: It will be used for look up optimization for kernel contexts
1151 * only. If it is negative value, then it means user contexts is calling this
1152 * function.
1153 *
1154 * It checks if hdr's pkey is valid.
1155 *
1156 * Return: 0 on success, otherwise, 1
1157 */
1158int egress_pkey_check(struct hfi1_pportdata *ppd, u32 slid, u16 pkey,
1159 u8 sc5, int8_t s_pkey_index)
1160{
1161 struct hfi1_devdata *dd;
1162 int i;
1163 int is_user_ctxt_mechanism = (s_pkey_index < 0);
1164
1165 if (!(ppd->part_enforce & HFI1_PART_ENFORCE_OUT))
1166 return 0;
1167
1168 /* If SC15, pkey[0:14] must be 0x7fff */
1169 if ((sc5 == 0xf) && ((pkey & PKEY_LOW_15_MASK) != PKEY_LOW_15_MASK))
1170 goto bad;
1171
1172 /* Is the pkey = 0x0, or 0x8000? */
1173 if ((pkey & PKEY_LOW_15_MASK) == 0)
1174 goto bad;
1175
1176 /*
1177 * For the kernel contexts only, if a qp is passed into the function,
1178 * the most likely matching pkey has index qp->s_pkey_index
1179 */
1180 if (!is_user_ctxt_mechanism &&
1181 egress_pkey_matches_entry(pkey, ppd->pkeys[s_pkey_index])) {
1182 return 0;
1183 }
1184
1185 for (i = 0; i < MAX_PKEY_VALUES; i++) {
1186 if (egress_pkey_matches_entry(pkey, ppd->pkeys[i]))
1187 return 0;
1188 }
1189bad:
1190 /*
1191 * For the user-context mechanism, the P_KEY check would only happen
1192 * once per SDMA request, not once per packet. Therefore, there's no
1193 * need to increment the counter for the user-context mechanism.
1194 */
1195 if (!is_user_ctxt_mechanism) {
1196 incr_cntr64(&ppd->port_xmit_constraint_errors);
1197 dd = ppd->dd;
1198 if (!(dd->err_info_xmit_constraint.status &
1199 OPA_EI_STATUS_SMASK)) {
1200 dd->err_info_xmit_constraint.status |=
1201 OPA_EI_STATUS_SMASK;
1202 dd->err_info_xmit_constraint.slid = slid;
1203 dd->err_info_xmit_constraint.pkey = pkey;
1204 }
1205 }
1206 return 1;
1207}
1208
1209/*
1210 * get_send_routine - choose an egress routine
1211 *
1212 * Choose an egress routine based on QP type
1213 * and size
1214 */
1215static inline send_routine get_send_routine(struct rvt_qp *qp,
1216 struct hfi1_pkt_state *ps)
1217{
1218 struct hfi1_devdata *dd = dd_from_ibdev(qp->ibqp.device);
1219 struct hfi1_qp_priv *priv = qp->priv;
1220 struct verbs_txreq *tx = ps->s_txreq;
1221
1222 if (unlikely(!(dd->flags & HFI1_HAS_SEND_DMA)))
1223 return dd->process_pio_send;
1224 switch (qp->ibqp.qp_type) {
1225 case IB_QPT_SMI:
1226 return dd->process_pio_send;
1227 case IB_QPT_GSI:
1228 case IB_QPT_UD:
1229 break;
1230 case IB_QPT_UC:
1231 case IB_QPT_RC:
1232 priv->s_running_pkt_size =
1233 (tx->s_cur_size + priv->s_running_pkt_size) / 2;
1234 if (piothreshold &&
1235 priv->s_running_pkt_size <= min(piothreshold, qp->pmtu) &&
1236 (BIT(ps->opcode & OPMASK) & pio_opmask[ps->opcode >> 5]) &&
1237 iowait_sdma_pending(&priv->s_iowait) == 0 &&
1238 !sdma_txreq_built(&tx->txreq))
1239 return dd->process_pio_send;
1240 break;
1241 default:
1242 break;
1243 }
1244 return dd->process_dma_send;
1245}
1246
1247/**
1248 * hfi1_verbs_send - send a packet
1249 * @qp: the QP to send on
1250 * @ps: the state of the packet to send
1251 *
1252 * Return zero if packet is sent or queued OK.
1253 * Return non-zero and clear qp->s_flags RVT_S_BUSY otherwise.
1254 */
1255int hfi1_verbs_send(struct rvt_qp *qp, struct hfi1_pkt_state *ps)
1256{
1257 struct hfi1_devdata *dd = dd_from_ibdev(qp->ibqp.device);
1258 struct hfi1_qp_priv *priv = qp->priv;
1259 struct ib_other_headers *ohdr = NULL;
1260 send_routine sr;
1261 int ret;
1262 u16 pkey;
1263 u32 slid;
1264 u8 l4 = 0;
1265
1266 /* locate the pkey within the headers */
1267 if (ps->s_txreq->phdr.hdr.hdr_type) {
1268 struct hfi1_16b_header *hdr = &ps->s_txreq->phdr.hdr.opah;
1269
1270 l4 = hfi1_16B_get_l4(hdr);
1271 if (l4 == OPA_16B_L4_IB_LOCAL)
1272 ohdr = &hdr->u.oth;
1273 else if (l4 == OPA_16B_L4_IB_GLOBAL)
1274 ohdr = &hdr->u.l.oth;
1275
1276 slid = hfi1_16B_get_slid(hdr);
1277 pkey = hfi1_16B_get_pkey(hdr);
1278 } else {
1279 struct ib_header *hdr = &ps->s_txreq->phdr.hdr.ibh;
1280 u8 lnh = ib_get_lnh(hdr);
1281
1282 if (lnh == HFI1_LRH_GRH)
1283 ohdr = &hdr->u.l.oth;
1284 else
1285 ohdr = &hdr->u.oth;
1286 slid = ib_get_slid(hdr);
1287 pkey = ib_bth_get_pkey(ohdr);
1288 }
1289
1290 if (likely(l4 != OPA_16B_L4_FM))
1291 ps->opcode = ib_bth_get_opcode(ohdr);
1292 else
1293 ps->opcode = IB_OPCODE_UD_SEND_ONLY;
1294
1295 sr = get_send_routine(qp, ps);
1296 ret = egress_pkey_check(dd->pport, slid, pkey,
1297 priv->s_sc, qp->s_pkey_index);
1298 if (unlikely(ret)) {
1299 /*
1300 * The value we are returning here does not get propagated to
1301 * the verbs caller. Thus we need to complete the request with
1302 * error otherwise the caller could be sitting waiting on the
1303 * completion event. Only do this for PIO. SDMA has its own
1304 * mechanism for handling the errors. So for SDMA we can just
1305 * return.
1306 */
1307 if (sr == dd->process_pio_send) {
1308 unsigned long flags;
1309
1310 hfi1_cdbg(PIO, "%s() Failed. Completing with err",
1311 __func__);
1312 spin_lock_irqsave(&qp->s_lock, flags);
1313 rvt_send_complete(qp, qp->s_wqe, IB_WC_GENERAL_ERR);
1314 spin_unlock_irqrestore(&qp->s_lock, flags);
1315 }
1316 return -EINVAL;
1317 }
1318 if (sr == dd->process_dma_send && iowait_pio_pending(&priv->s_iowait))
1319 return pio_wait(qp,
1320 ps->s_txreq->psc,
1321 ps,
1322 HFI1_S_WAIT_PIO_DRAIN);
1323 return sr(qp, ps, 0);
1324}
1325
1326/**
1327 * hfi1_fill_device_attr - Fill in rvt dev info device attributes.
1328 * @dd: the device data structure
1329 */
1330static void hfi1_fill_device_attr(struct hfi1_devdata *dd)
1331{
1332 struct rvt_dev_info *rdi = &dd->verbs_dev.rdi;
1333 u32 ver = dd->dc8051_ver;
1334
1335 memset(&rdi->dparms.props, 0, sizeof(rdi->dparms.props));
1336
1337 rdi->dparms.props.fw_ver = ((u64)(dc8051_ver_maj(ver)) << 32) |
1338 ((u64)(dc8051_ver_min(ver)) << 16) |
1339 (u64)dc8051_ver_patch(ver);
1340
1341 rdi->dparms.props.device_cap_flags = IB_DEVICE_BAD_PKEY_CNTR |
1342 IB_DEVICE_BAD_QKEY_CNTR | IB_DEVICE_SHUTDOWN_PORT |
1343 IB_DEVICE_SYS_IMAGE_GUID | IB_DEVICE_RC_RNR_NAK_GEN |
1344 IB_DEVICE_PORT_ACTIVE_EVENT | IB_DEVICE_SRQ_RESIZE |
1345 IB_DEVICE_MEM_MGT_EXTENSIONS |
1346 IB_DEVICE_RDMA_NETDEV_OPA;
1347 rdi->dparms.props.page_size_cap = PAGE_SIZE;
1348 rdi->dparms.props.vendor_id = dd->oui1 << 16 | dd->oui2 << 8 | dd->oui3;
1349 rdi->dparms.props.vendor_part_id = dd->pcidev->device;
1350 rdi->dparms.props.hw_ver = dd->minrev;
1351 rdi->dparms.props.sys_image_guid = ib_hfi1_sys_image_guid;
1352 rdi->dparms.props.max_mr_size = U64_MAX;
1353 rdi->dparms.props.max_fast_reg_page_list_len = UINT_MAX;
1354 rdi->dparms.props.max_qp = hfi1_max_qps;
1355 rdi->dparms.props.max_qp_wr =
1356 (hfi1_max_qp_wrs >= HFI1_QP_WQE_INVALID ?
1357 HFI1_QP_WQE_INVALID - 1 : hfi1_max_qp_wrs);
1358 rdi->dparms.props.max_send_sge = hfi1_max_sges;
1359 rdi->dparms.props.max_recv_sge = hfi1_max_sges;
1360 rdi->dparms.props.max_sge_rd = hfi1_max_sges;
1361 rdi->dparms.props.max_cq = hfi1_max_cqs;
1362 rdi->dparms.props.max_ah = hfi1_max_ahs;
1363 rdi->dparms.props.max_cqe = hfi1_max_cqes;
1364 rdi->dparms.props.max_pd = hfi1_max_pds;
1365 rdi->dparms.props.max_qp_rd_atom = HFI1_MAX_RDMA_ATOMIC;
1366 rdi->dparms.props.max_qp_init_rd_atom = 255;
1367 rdi->dparms.props.max_srq = hfi1_max_srqs;
1368 rdi->dparms.props.max_srq_wr = hfi1_max_srq_wrs;
1369 rdi->dparms.props.max_srq_sge = hfi1_max_srq_sges;
1370 rdi->dparms.props.atomic_cap = IB_ATOMIC_GLOB;
1371 rdi->dparms.props.max_pkeys = hfi1_get_npkeys(dd);
1372 rdi->dparms.props.max_mcast_grp = hfi1_max_mcast_grps;
1373 rdi->dparms.props.max_mcast_qp_attach = hfi1_max_mcast_qp_attached;
1374 rdi->dparms.props.max_total_mcast_qp_attach =
1375 rdi->dparms.props.max_mcast_qp_attach *
1376 rdi->dparms.props.max_mcast_grp;
1377}
1378
1379static inline u16 opa_speed_to_ib(u16 in)
1380{
1381 u16 out = 0;
1382
1383 if (in & OPA_LINK_SPEED_25G)
1384 out |= IB_SPEED_EDR;
1385 if (in & OPA_LINK_SPEED_12_5G)
1386 out |= IB_SPEED_FDR;
1387
1388 return out;
1389}
1390
1391/*
1392 * Convert a single OPA link width (no multiple flags) to an IB value.
1393 * A zero OPA link width means link down, which means the IB width value
1394 * is a don't care.
1395 */
1396static inline u16 opa_width_to_ib(u16 in)
1397{
1398 switch (in) {
1399 case OPA_LINK_WIDTH_1X:
1400 /* map 2x and 3x to 1x as they don't exist in IB */
1401 case OPA_LINK_WIDTH_2X:
1402 case OPA_LINK_WIDTH_3X:
1403 return IB_WIDTH_1X;
1404 default: /* link down or unknown, return our largest width */
1405 case OPA_LINK_WIDTH_4X:
1406 return IB_WIDTH_4X;
1407 }
1408}
1409
1410static int query_port(struct rvt_dev_info *rdi, u32 port_num,
1411 struct ib_port_attr *props)
1412{
1413 struct hfi1_ibdev *verbs_dev = dev_from_rdi(rdi);
1414 struct hfi1_devdata *dd = dd_from_dev(verbs_dev);
1415 struct hfi1_pportdata *ppd = &dd->pport[port_num - 1];
1416 u32 lid = ppd->lid;
1417
1418 /* props being zeroed by the caller, avoid zeroing it here */
1419 props->lid = lid ? lid : 0;
1420 props->lmc = ppd->lmc;
1421 /* OPA logical states match IB logical states */
1422 props->state = driver_lstate(ppd);
1423 props->phys_state = driver_pstate(ppd);
1424 props->gid_tbl_len = HFI1_GUIDS_PER_PORT;
1425 props->active_width = (u8)opa_width_to_ib(ppd->link_width_active);
1426 /* see rate_show() in ib core/sysfs.c */
1427 props->active_speed = opa_speed_to_ib(ppd->link_speed_active);
1428 props->max_vl_num = ppd->vls_supported;
1429
1430 /* Once we are a "first class" citizen and have added the OPA MTUs to
1431 * the core we can advertise the larger MTU enum to the ULPs, for now
1432 * advertise only 4K.
1433 *
1434 * Those applications which are either OPA aware or pass the MTU enum
1435 * from the Path Records to us will get the new 8k MTU. Those that
1436 * attempt to process the MTU enum may fail in various ways.
1437 */
1438 props->max_mtu = mtu_to_enum((!valid_ib_mtu(hfi1_max_mtu) ?
1439 4096 : hfi1_max_mtu), IB_MTU_4096);
1440 props->active_mtu = !valid_ib_mtu(ppd->ibmtu) ? props->max_mtu :
1441 mtu_to_enum(ppd->ibmtu, IB_MTU_4096);
1442 props->phys_mtu = HFI1_CAP_IS_KSET(AIP) ? hfi1_max_mtu :
1443 ib_mtu_enum_to_int(props->max_mtu);
1444
1445 return 0;
1446}
1447
1448static int modify_device(struct ib_device *device,
1449 int device_modify_mask,
1450 struct ib_device_modify *device_modify)
1451{
1452 struct hfi1_devdata *dd = dd_from_ibdev(device);
1453 unsigned i;
1454 int ret;
1455
1456 if (device_modify_mask & ~(IB_DEVICE_MODIFY_SYS_IMAGE_GUID |
1457 IB_DEVICE_MODIFY_NODE_DESC)) {
1458 ret = -EOPNOTSUPP;
1459 goto bail;
1460 }
1461
1462 if (device_modify_mask & IB_DEVICE_MODIFY_NODE_DESC) {
1463 memcpy(device->node_desc, device_modify->node_desc,
1464 IB_DEVICE_NODE_DESC_MAX);
1465 for (i = 0; i < dd->num_pports; i++) {
1466 struct hfi1_ibport *ibp = &dd->pport[i].ibport_data;
1467
1468 hfi1_node_desc_chg(ibp);
1469 }
1470 }
1471
1472 if (device_modify_mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID) {
1473 ib_hfi1_sys_image_guid =
1474 cpu_to_be64(device_modify->sys_image_guid);
1475 for (i = 0; i < dd->num_pports; i++) {
1476 struct hfi1_ibport *ibp = &dd->pport[i].ibport_data;
1477
1478 hfi1_sys_guid_chg(ibp);
1479 }
1480 }
1481
1482 ret = 0;
1483
1484bail:
1485 return ret;
1486}
1487
1488static int shut_down_port(struct rvt_dev_info *rdi, u32 port_num)
1489{
1490 struct hfi1_ibdev *verbs_dev = dev_from_rdi(rdi);
1491 struct hfi1_devdata *dd = dd_from_dev(verbs_dev);
1492 struct hfi1_pportdata *ppd = &dd->pport[port_num - 1];
1493 int ret;
1494
1495 set_link_down_reason(ppd, OPA_LINKDOWN_REASON_UNKNOWN, 0,
1496 OPA_LINKDOWN_REASON_UNKNOWN);
1497 ret = set_link_state(ppd, HLS_DN_DOWNDEF);
1498 return ret;
1499}
1500
1501static int hfi1_get_guid_be(struct rvt_dev_info *rdi, struct rvt_ibport *rvp,
1502 int guid_index, __be64 *guid)
1503{
1504 struct hfi1_ibport *ibp = container_of(rvp, struct hfi1_ibport, rvp);
1505
1506 if (guid_index >= HFI1_GUIDS_PER_PORT)
1507 return -EINVAL;
1508
1509 *guid = get_sguid(ibp, guid_index);
1510 return 0;
1511}
1512
1513/*
1514 * convert ah port,sl to sc
1515 */
1516u8 ah_to_sc(struct ib_device *ibdev, struct rdma_ah_attr *ah)
1517{
1518 struct hfi1_ibport *ibp = to_iport(ibdev, rdma_ah_get_port_num(ah));
1519
1520 return ibp->sl_to_sc[rdma_ah_get_sl(ah)];
1521}
1522
1523static int hfi1_check_ah(struct ib_device *ibdev, struct rdma_ah_attr *ah_attr)
1524{
1525 struct hfi1_ibport *ibp;
1526 struct hfi1_pportdata *ppd;
1527 struct hfi1_devdata *dd;
1528 u8 sc5;
1529 u8 sl;
1530
1531 if (hfi1_check_mcast(rdma_ah_get_dlid(ah_attr)) &&
1532 !(rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH))
1533 return -EINVAL;
1534
1535 /* test the mapping for validity */
1536 ibp = to_iport(ibdev, rdma_ah_get_port_num(ah_attr));
1537 ppd = ppd_from_ibp(ibp);
1538 dd = dd_from_ppd(ppd);
1539
1540 sl = rdma_ah_get_sl(ah_attr);
1541 if (sl >= ARRAY_SIZE(ibp->sl_to_sc))
1542 return -EINVAL;
1543 sl = array_index_nospec(sl, ARRAY_SIZE(ibp->sl_to_sc));
1544
1545 sc5 = ibp->sl_to_sc[sl];
1546 if (sc_to_vlt(dd, sc5) > num_vls && sc_to_vlt(dd, sc5) != 0xf)
1547 return -EINVAL;
1548 return 0;
1549}
1550
1551static void hfi1_notify_new_ah(struct ib_device *ibdev,
1552 struct rdma_ah_attr *ah_attr,
1553 struct rvt_ah *ah)
1554{
1555 struct hfi1_ibport *ibp;
1556 struct hfi1_pportdata *ppd;
1557 struct hfi1_devdata *dd;
1558 u8 sc5;
1559 struct rdma_ah_attr *attr = &ah->attr;
1560
1561 /*
1562 * Do not trust reading anything from rvt_ah at this point as it is not
1563 * done being setup. We can however modify things which we need to set.
1564 */
1565
1566 ibp = to_iport(ibdev, rdma_ah_get_port_num(ah_attr));
1567 ppd = ppd_from_ibp(ibp);
1568 sc5 = ibp->sl_to_sc[rdma_ah_get_sl(&ah->attr)];
1569 hfi1_update_ah_attr(ibdev, attr);
1570 hfi1_make_opa_lid(attr);
1571 dd = dd_from_ppd(ppd);
1572 ah->vl = sc_to_vlt(dd, sc5);
1573 if (ah->vl < num_vls || ah->vl == 15)
1574 ah->log_pmtu = ilog2(dd->vld[ah->vl].mtu);
1575}
1576
1577/**
1578 * hfi1_get_npkeys - return the size of the PKEY table for context 0
1579 * @dd: the hfi1_ib device
1580 */
1581unsigned hfi1_get_npkeys(struct hfi1_devdata *dd)
1582{
1583 return ARRAY_SIZE(dd->pport[0].pkeys);
1584}
1585
1586static void init_ibport(struct hfi1_pportdata *ppd)
1587{
1588 struct hfi1_ibport *ibp = &ppd->ibport_data;
1589 size_t sz = ARRAY_SIZE(ibp->sl_to_sc);
1590 int i;
1591
1592 for (i = 0; i < sz; i++) {
1593 ibp->sl_to_sc[i] = i;
1594 ibp->sc_to_sl[i] = i;
1595 }
1596
1597 for (i = 0; i < RVT_MAX_TRAP_LISTS ; i++)
1598 INIT_LIST_HEAD(&ibp->rvp.trap_lists[i].list);
1599 timer_setup(&ibp->rvp.trap_timer, hfi1_handle_trap_timer, 0);
1600
1601 spin_lock_init(&ibp->rvp.lock);
1602 /* Set the prefix to the default value (see ch. 4.1.1) */
1603 ibp->rvp.gid_prefix = IB_DEFAULT_GID_PREFIX;
1604 ibp->rvp.sm_lid = 0;
1605 /*
1606 * Below should only set bits defined in OPA PortInfo.CapabilityMask
1607 * and PortInfo.CapabilityMask3
1608 */
1609 ibp->rvp.port_cap_flags = IB_PORT_AUTO_MIGR_SUP |
1610 IB_PORT_CAP_MASK_NOTICE_SUP;
1611 ibp->rvp.port_cap3_flags = OPA_CAP_MASK3_IsSharedSpaceSupported;
1612 ibp->rvp.pma_counter_select[0] = IB_PMA_PORT_XMIT_DATA;
1613 ibp->rvp.pma_counter_select[1] = IB_PMA_PORT_RCV_DATA;
1614 ibp->rvp.pma_counter_select[2] = IB_PMA_PORT_XMIT_PKTS;
1615 ibp->rvp.pma_counter_select[3] = IB_PMA_PORT_RCV_PKTS;
1616 ibp->rvp.pma_counter_select[4] = IB_PMA_PORT_XMIT_WAIT;
1617
1618 RCU_INIT_POINTER(ibp->rvp.qp[0], NULL);
1619 RCU_INIT_POINTER(ibp->rvp.qp[1], NULL);
1620}
1621
1622static void hfi1_get_dev_fw_str(struct ib_device *ibdev, char *str)
1623{
1624 struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
1625 struct hfi1_ibdev *dev = dev_from_rdi(rdi);
1626 u32 ver = dd_from_dev(dev)->dc8051_ver;
1627
1628 snprintf(str, IB_FW_VERSION_NAME_MAX, "%u.%u.%u", dc8051_ver_maj(ver),
1629 dc8051_ver_min(ver), dc8051_ver_patch(ver));
1630}
1631
1632static const char * const driver_cntr_names[] = {
1633 /* must be element 0*/
1634 "DRIVER_KernIntr",
1635 "DRIVER_ErrorIntr",
1636 "DRIVER_Tx_Errs",
1637 "DRIVER_Rcv_Errs",
1638 "DRIVER_HW_Errs",
1639 "DRIVER_NoPIOBufs",
1640 "DRIVER_CtxtsOpen",
1641 "DRIVER_RcvLen_Errs",
1642 "DRIVER_EgrBufFull",
1643 "DRIVER_EgrHdrFull"
1644};
1645
1646static DEFINE_MUTEX(cntr_names_lock); /* protects the *_cntr_names bufers */
1647static const char **dev_cntr_names;
1648static const char **port_cntr_names;
1649int num_driver_cntrs = ARRAY_SIZE(driver_cntr_names);
1650static int num_dev_cntrs;
1651static int num_port_cntrs;
1652static int cntr_names_initialized;
1653
1654/*
1655 * Convert a list of names separated by '\n' into an array of NULL terminated
1656 * strings. Optionally some entries can be reserved in the array to hold extra
1657 * external strings.
1658 */
1659static int init_cntr_names(const char *names_in,
1660 const size_t names_len,
1661 int num_extra_names,
1662 int *num_cntrs,
1663 const char ***cntr_names)
1664{
1665 char *names_out, *p, **q;
1666 int i, n;
1667
1668 n = 0;
1669 for (i = 0; i < names_len; i++)
1670 if (names_in[i] == '\n')
1671 n++;
1672
1673 names_out = kmalloc((n + num_extra_names) * sizeof(char *) + names_len,
1674 GFP_KERNEL);
1675 if (!names_out) {
1676 *num_cntrs = 0;
1677 *cntr_names = NULL;
1678 return -ENOMEM;
1679 }
1680
1681 p = names_out + (n + num_extra_names) * sizeof(char *);
1682 memcpy(p, names_in, names_len);
1683
1684 q = (char **)names_out;
1685 for (i = 0; i < n; i++) {
1686 q[i] = p;
1687 p = strchr(p, '\n');
1688 *p++ = '\0';
1689 }
1690
1691 *num_cntrs = n;
1692 *cntr_names = (const char **)names_out;
1693 return 0;
1694}
1695
1696static int init_counters(struct ib_device *ibdev)
1697{
1698 struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
1699 int i, err = 0;
1700
1701 mutex_lock(&cntr_names_lock);
1702 if (cntr_names_initialized)
1703 goto out_unlock;
1704
1705 err = init_cntr_names(dd->cntrnames, dd->cntrnameslen, num_driver_cntrs,
1706 &num_dev_cntrs, &dev_cntr_names);
1707 if (err)
1708 goto out_unlock;
1709
1710 for (i = 0; i < num_driver_cntrs; i++)
1711 dev_cntr_names[num_dev_cntrs + i] = driver_cntr_names[i];
1712
1713 err = init_cntr_names(dd->portcntrnames, dd->portcntrnameslen, 0,
1714 &num_port_cntrs, &port_cntr_names);
1715 if (err) {
1716 kfree(dev_cntr_names);
1717 dev_cntr_names = NULL;
1718 goto out_unlock;
1719 }
1720 cntr_names_initialized = 1;
1721
1722out_unlock:
1723 mutex_unlock(&cntr_names_lock);
1724 return err;
1725}
1726
1727static struct rdma_hw_stats *hfi1_alloc_hw_device_stats(struct ib_device *ibdev)
1728{
1729 if (init_counters(ibdev))
1730 return NULL;
1731 return rdma_alloc_hw_stats_struct(dev_cntr_names,
1732 num_dev_cntrs + num_driver_cntrs,
1733 RDMA_HW_STATS_DEFAULT_LIFESPAN);
1734}
1735
1736static struct rdma_hw_stats *hfi_alloc_hw_port_stats(struct ib_device *ibdev,
1737 u32 port_num)
1738{
1739 if (init_counters(ibdev))
1740 return NULL;
1741 return rdma_alloc_hw_stats_struct(port_cntr_names, num_port_cntrs,
1742 RDMA_HW_STATS_DEFAULT_LIFESPAN);
1743}
1744
1745static u64 hfi1_sps_ints(void)
1746{
1747 unsigned long index, flags;
1748 struct hfi1_devdata *dd;
1749 u64 sps_ints = 0;
1750
1751 xa_lock_irqsave(&hfi1_dev_table, flags);
1752 xa_for_each(&hfi1_dev_table, index, dd) {
1753 sps_ints += get_all_cpu_total(dd->int_counter);
1754 }
1755 xa_unlock_irqrestore(&hfi1_dev_table, flags);
1756 return sps_ints;
1757}
1758
1759static int get_hw_stats(struct ib_device *ibdev, struct rdma_hw_stats *stats,
1760 u32 port, int index)
1761{
1762 u64 *values;
1763 int count;
1764
1765 if (!port) {
1766 u64 *stats = (u64 *)&hfi1_stats;
1767 int i;
1768
1769 hfi1_read_cntrs(dd_from_ibdev(ibdev), NULL, &values);
1770 values[num_dev_cntrs] = hfi1_sps_ints();
1771 for (i = 1; i < num_driver_cntrs; i++)
1772 values[num_dev_cntrs + i] = stats[i];
1773 count = num_dev_cntrs + num_driver_cntrs;
1774 } else {
1775 struct hfi1_ibport *ibp = to_iport(ibdev, port);
1776
1777 hfi1_read_portcntrs(ppd_from_ibp(ibp), NULL, &values);
1778 count = num_port_cntrs;
1779 }
1780
1781 memcpy(stats->value, values, count * sizeof(u64));
1782 return count;
1783}
1784
1785static const struct ib_device_ops hfi1_dev_ops = {
1786 .owner = THIS_MODULE,
1787 .driver_id = RDMA_DRIVER_HFI1,
1788
1789 .alloc_hw_device_stats = hfi1_alloc_hw_device_stats,
1790 .alloc_hw_port_stats = hfi_alloc_hw_port_stats,
1791 .alloc_rdma_netdev = hfi1_vnic_alloc_rn,
1792 .device_group = &ib_hfi1_attr_group,
1793 .get_dev_fw_str = hfi1_get_dev_fw_str,
1794 .get_hw_stats = get_hw_stats,
1795 .modify_device = modify_device,
1796 .port_groups = hfi1_attr_port_groups,
1797 /* keep process mad in the driver */
1798 .process_mad = hfi1_process_mad,
1799 .rdma_netdev_get_params = hfi1_ipoib_rn_get_params,
1800};
1801
1802/**
1803 * hfi1_register_ib_device - register our device with the infiniband core
1804 * @dd: the device data structure
1805 * Return 0 if successful, errno if unsuccessful.
1806 */
1807int hfi1_register_ib_device(struct hfi1_devdata *dd)
1808{
1809 struct hfi1_ibdev *dev = &dd->verbs_dev;
1810 struct ib_device *ibdev = &dev->rdi.ibdev;
1811 struct hfi1_pportdata *ppd = dd->pport;
1812 struct hfi1_ibport *ibp = &ppd->ibport_data;
1813 unsigned i;
1814 int ret;
1815
1816 for (i = 0; i < dd->num_pports; i++)
1817 init_ibport(ppd + i);
1818
1819 /* Only need to initialize non-zero fields. */
1820
1821 timer_setup(&dev->mem_timer, mem_timer, 0);
1822
1823 seqlock_init(&dev->iowait_lock);
1824 seqlock_init(&dev->txwait_lock);
1825 INIT_LIST_HEAD(&dev->txwait);
1826 INIT_LIST_HEAD(&dev->memwait);
1827
1828 ret = verbs_txreq_init(dev);
1829 if (ret)
1830 goto err_verbs_txreq;
1831
1832 /* Use first-port GUID as node guid */
1833 ibdev->node_guid = get_sguid(ibp, HFI1_PORT_GUID_INDEX);
1834
1835 /*
1836 * The system image GUID is supposed to be the same for all
1837 * HFIs in a single system but since there can be other
1838 * device types in the system, we can't be sure this is unique.
1839 */
1840 if (!ib_hfi1_sys_image_guid)
1841 ib_hfi1_sys_image_guid = ibdev->node_guid;
1842 ibdev->phys_port_cnt = dd->num_pports;
1843 ibdev->dev.parent = &dd->pcidev->dev;
1844
1845 ib_set_device_ops(ibdev, &hfi1_dev_ops);
1846
1847 strlcpy(ibdev->node_desc, init_utsname()->nodename,
1848 sizeof(ibdev->node_desc));
1849
1850 /*
1851 * Fill in rvt info object.
1852 */
1853 dd->verbs_dev.rdi.driver_f.get_pci_dev = get_pci_dev;
1854 dd->verbs_dev.rdi.driver_f.check_ah = hfi1_check_ah;
1855 dd->verbs_dev.rdi.driver_f.notify_new_ah = hfi1_notify_new_ah;
1856 dd->verbs_dev.rdi.driver_f.get_guid_be = hfi1_get_guid_be;
1857 dd->verbs_dev.rdi.driver_f.query_port_state = query_port;
1858 dd->verbs_dev.rdi.driver_f.shut_down_port = shut_down_port;
1859 dd->verbs_dev.rdi.driver_f.cap_mask_chg = hfi1_cap_mask_chg;
1860 /*
1861 * Fill in rvt info device attributes.
1862 */
1863 hfi1_fill_device_attr(dd);
1864
1865 /* queue pair */
1866 dd->verbs_dev.rdi.dparms.qp_table_size = hfi1_qp_table_size;
1867 dd->verbs_dev.rdi.dparms.qpn_start = 0;
1868 dd->verbs_dev.rdi.dparms.qpn_inc = 1;
1869 dd->verbs_dev.rdi.dparms.qos_shift = dd->qos_shift;
1870 dd->verbs_dev.rdi.dparms.qpn_res_start = RVT_KDETH_QP_BASE;
1871 dd->verbs_dev.rdi.dparms.qpn_res_end = RVT_AIP_QP_MAX;
1872 dd->verbs_dev.rdi.dparms.max_rdma_atomic = HFI1_MAX_RDMA_ATOMIC;
1873 dd->verbs_dev.rdi.dparms.psn_mask = PSN_MASK;
1874 dd->verbs_dev.rdi.dparms.psn_shift = PSN_SHIFT;
1875 dd->verbs_dev.rdi.dparms.psn_modify_mask = PSN_MODIFY_MASK;
1876 dd->verbs_dev.rdi.dparms.core_cap_flags = RDMA_CORE_PORT_INTEL_OPA |
1877 RDMA_CORE_CAP_OPA_AH;
1878 dd->verbs_dev.rdi.dparms.max_mad_size = OPA_MGMT_MAD_SIZE;
1879
1880 dd->verbs_dev.rdi.driver_f.qp_priv_alloc = qp_priv_alloc;
1881 dd->verbs_dev.rdi.driver_f.qp_priv_init = hfi1_qp_priv_init;
1882 dd->verbs_dev.rdi.driver_f.qp_priv_free = qp_priv_free;
1883 dd->verbs_dev.rdi.driver_f.free_all_qps = free_all_qps;
1884 dd->verbs_dev.rdi.driver_f.notify_qp_reset = notify_qp_reset;
1885 dd->verbs_dev.rdi.driver_f.do_send = hfi1_do_send_from_rvt;
1886 dd->verbs_dev.rdi.driver_f.schedule_send = hfi1_schedule_send;
1887 dd->verbs_dev.rdi.driver_f.schedule_send_no_lock = _hfi1_schedule_send;
1888 dd->verbs_dev.rdi.driver_f.get_pmtu_from_attr = get_pmtu_from_attr;
1889 dd->verbs_dev.rdi.driver_f.notify_error_qp = notify_error_qp;
1890 dd->verbs_dev.rdi.driver_f.flush_qp_waiters = flush_qp_waiters;
1891 dd->verbs_dev.rdi.driver_f.stop_send_queue = stop_send_queue;
1892 dd->verbs_dev.rdi.driver_f.quiesce_qp = quiesce_qp;
1893 dd->verbs_dev.rdi.driver_f.notify_error_qp = notify_error_qp;
1894 dd->verbs_dev.rdi.driver_f.mtu_from_qp = mtu_from_qp;
1895 dd->verbs_dev.rdi.driver_f.mtu_to_path_mtu = mtu_to_path_mtu;
1896 dd->verbs_dev.rdi.driver_f.check_modify_qp = hfi1_check_modify_qp;
1897 dd->verbs_dev.rdi.driver_f.modify_qp = hfi1_modify_qp;
1898 dd->verbs_dev.rdi.driver_f.notify_restart_rc = hfi1_restart_rc;
1899 dd->verbs_dev.rdi.driver_f.setup_wqe = hfi1_setup_wqe;
1900 dd->verbs_dev.rdi.driver_f.comp_vect_cpu_lookup =
1901 hfi1_comp_vect_mappings_lookup;
1902
1903 /* completeion queue */
1904 dd->verbs_dev.rdi.ibdev.num_comp_vectors = dd->comp_vect_possible_cpus;
1905 dd->verbs_dev.rdi.dparms.node = dd->node;
1906
1907 /* misc settings */
1908 dd->verbs_dev.rdi.flags = 0; /* Let rdmavt handle it all */
1909 dd->verbs_dev.rdi.dparms.lkey_table_size = hfi1_lkey_table_size;
1910 dd->verbs_dev.rdi.dparms.nports = dd->num_pports;
1911 dd->verbs_dev.rdi.dparms.npkeys = hfi1_get_npkeys(dd);
1912 dd->verbs_dev.rdi.dparms.sge_copy_mode = sge_copy_mode;
1913 dd->verbs_dev.rdi.dparms.wss_threshold = wss_threshold;
1914 dd->verbs_dev.rdi.dparms.wss_clean_period = wss_clean_period;
1915 dd->verbs_dev.rdi.dparms.reserved_operations = 1;
1916 dd->verbs_dev.rdi.dparms.extra_rdma_atomic = HFI1_TID_RDMA_WRITE_CNT;
1917
1918 /* post send table */
1919 dd->verbs_dev.rdi.post_parms = hfi1_post_parms;
1920
1921 /* opcode translation table */
1922 dd->verbs_dev.rdi.wc_opcode = ib_hfi1_wc_opcode;
1923
1924 ppd = dd->pport;
1925 for (i = 0; i < dd->num_pports; i++, ppd++)
1926 rvt_init_port(&dd->verbs_dev.rdi,
1927 &ppd->ibport_data.rvp,
1928 i,
1929 ppd->pkeys);
1930
1931 ret = rvt_register_device(&dd->verbs_dev.rdi);
1932 if (ret)
1933 goto err_verbs_txreq;
1934
1935 ret = hfi1_verbs_register_sysfs(dd);
1936 if (ret)
1937 goto err_class;
1938
1939 return ret;
1940
1941err_class:
1942 rvt_unregister_device(&dd->verbs_dev.rdi);
1943err_verbs_txreq:
1944 verbs_txreq_exit(dev);
1945 dd_dev_err(dd, "cannot register verbs: %d!\n", -ret);
1946 return ret;
1947}
1948
1949void hfi1_unregister_ib_device(struct hfi1_devdata *dd)
1950{
1951 struct hfi1_ibdev *dev = &dd->verbs_dev;
1952
1953 hfi1_verbs_unregister_sysfs(dd);
1954
1955 rvt_unregister_device(&dd->verbs_dev.rdi);
1956
1957 if (!list_empty(&dev->txwait))
1958 dd_dev_err(dd, "txwait list not empty!\n");
1959 if (!list_empty(&dev->memwait))
1960 dd_dev_err(dd, "memwait list not empty!\n");
1961
1962 del_timer_sync(&dev->mem_timer);
1963 verbs_txreq_exit(dev);
1964
1965 mutex_lock(&cntr_names_lock);
1966 kfree(dev_cntr_names);
1967 kfree(port_cntr_names);
1968 dev_cntr_names = NULL;
1969 port_cntr_names = NULL;
1970 cntr_names_initialized = 0;
1971 mutex_unlock(&cntr_names_lock);
1972}
1973
1974void hfi1_cnp_rcv(struct hfi1_packet *packet)
1975{
1976 struct hfi1_ibport *ibp = rcd_to_iport(packet->rcd);
1977 struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
1978 struct ib_header *hdr = packet->hdr;
1979 struct rvt_qp *qp = packet->qp;
1980 u32 lqpn, rqpn = 0;
1981 u16 rlid = 0;
1982 u8 sl, sc5, svc_type;
1983
1984 switch (packet->qp->ibqp.qp_type) {
1985 case IB_QPT_UC:
1986 rlid = rdma_ah_get_dlid(&qp->remote_ah_attr);
1987 rqpn = qp->remote_qpn;
1988 svc_type = IB_CC_SVCTYPE_UC;
1989 break;
1990 case IB_QPT_RC:
1991 rlid = rdma_ah_get_dlid(&qp->remote_ah_attr);
1992 rqpn = qp->remote_qpn;
1993 svc_type = IB_CC_SVCTYPE_RC;
1994 break;
1995 case IB_QPT_SMI:
1996 case IB_QPT_GSI:
1997 case IB_QPT_UD:
1998 svc_type = IB_CC_SVCTYPE_UD;
1999 break;
2000 default:
2001 ibp->rvp.n_pkt_drops++;
2002 return;
2003 }
2004
2005 sc5 = hfi1_9B_get_sc5(hdr, packet->rhf);
2006 sl = ibp->sc_to_sl[sc5];
2007 lqpn = qp->ibqp.qp_num;
2008
2009 process_becn(ppd, sl, rlid, lqpn, rqpn, svc_type);
2010}