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6522108f | 1 | /* |
e7eacd36 | 2 | * Copyright (c) 2006, 2007, 2008 QLogic Corporation. All rights reserved. |
6522108f BS |
3 | * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved. |
4 | * | |
5 | * This software is available to you under a choice of one of two | |
6 | * licenses. You may choose to be licensed under the terms of the GNU | |
7 | * General Public License (GPL) Version 2, available from the file | |
8 | * COPYING in the main directory of this source tree, or the | |
9 | * OpenIB.org BSD license below: | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or | |
12 | * without modification, are permitted provided that the following | |
13 | * conditions are met: | |
14 | * | |
15 | * - Redistributions of source code must retain the above | |
16 | * copyright notice, this list of conditions and the following | |
17 | * disclaimer. | |
18 | * | |
19 | * - Redistributions in binary form must reproduce the above | |
20 | * copyright notice, this list of conditions and the following | |
21 | * disclaimer in the documentation and/or other materials | |
22 | * provided with the distribution. | |
23 | * | |
24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
25 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
26 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
27 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
28 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
29 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
30 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
31 | * SOFTWARE. | |
32 | */ | |
33 | ||
34 | #include <rdma/ib_mad.h> | |
35 | #include <rdma/ib_user_verbs.h> | |
34b2aafe | 36 | #include <linux/io.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
6522108f | 38 | #include <linux/utsname.h> |
82524746 | 39 | #include <linux/rculist.h> |
6522108f BS |
40 | |
41 | #include "ipath_kernel.h" | |
42 | #include "ipath_verbs.h" | |
27b678dd | 43 | #include "ipath_common.h" |
6522108f | 44 | |
ac2ae4c9 | 45 | static unsigned int ib_ipath_qp_table_size = 251; |
6522108f BS |
46 | module_param_named(qp_table_size, ib_ipath_qp_table_size, uint, S_IRUGO); |
47 | MODULE_PARM_DESC(qp_table_size, "QP table size"); | |
48 | ||
49 | unsigned int ib_ipath_lkey_table_size = 12; | |
50 | module_param_named(lkey_table_size, ib_ipath_lkey_table_size, uint, | |
51 | S_IRUGO); | |
52 | MODULE_PARM_DESC(lkey_table_size, | |
53 | "LKEY table size in bits (2^n, 1 <= n <= 23)"); | |
54 | ||
fe62546a BS |
55 | static unsigned int ib_ipath_max_pds = 0xFFFF; |
56 | module_param_named(max_pds, ib_ipath_max_pds, uint, S_IWUSR | S_IRUGO); | |
57 | MODULE_PARM_DESC(max_pds, | |
58 | "Maximum number of protection domains to support"); | |
59 | ||
60 | static unsigned int ib_ipath_max_ahs = 0xFFFF; | |
61 | module_param_named(max_ahs, ib_ipath_max_ahs, uint, S_IWUSR | S_IRUGO); | |
62 | MODULE_PARM_DESC(max_ahs, "Maximum number of address handles to support"); | |
63 | ||
64 | unsigned int ib_ipath_max_cqes = 0x2FFFF; | |
65 | module_param_named(max_cqes, ib_ipath_max_cqes, uint, S_IWUSR | S_IRUGO); | |
66 | MODULE_PARM_DESC(max_cqes, | |
67 | "Maximum number of completion queue entries to support"); | |
68 | ||
69 | unsigned int ib_ipath_max_cqs = 0x1FFFF; | |
70 | module_param_named(max_cqs, ib_ipath_max_cqs, uint, S_IWUSR | S_IRUGO); | |
71 | MODULE_PARM_DESC(max_cqs, "Maximum number of completion queues to support"); | |
72 | ||
73 | unsigned int ib_ipath_max_qp_wrs = 0x3FFF; | |
74 | module_param_named(max_qp_wrs, ib_ipath_max_qp_wrs, uint, | |
75 | S_IWUSR | S_IRUGO); | |
76 | MODULE_PARM_DESC(max_qp_wrs, "Maximum number of QP WRs to support"); | |
77 | ||
0b81e4f7 BS |
78 | unsigned int ib_ipath_max_qps = 16384; |
79 | module_param_named(max_qps, ib_ipath_max_qps, uint, S_IWUSR | S_IRUGO); | |
80 | MODULE_PARM_DESC(max_qps, "Maximum number of QPs to support"); | |
81 | ||
fe62546a BS |
82 | unsigned int ib_ipath_max_sges = 0x60; |
83 | module_param_named(max_sges, ib_ipath_max_sges, uint, S_IWUSR | S_IRUGO); | |
84 | MODULE_PARM_DESC(max_sges, "Maximum number of SGEs to support"); | |
85 | ||
86 | unsigned int ib_ipath_max_mcast_grps = 16384; | |
87 | module_param_named(max_mcast_grps, ib_ipath_max_mcast_grps, uint, | |
88 | S_IWUSR | S_IRUGO); | |
89 | MODULE_PARM_DESC(max_mcast_grps, | |
90 | "Maximum number of multicast groups to support"); | |
91 | ||
92 | unsigned int ib_ipath_max_mcast_qp_attached = 16; | |
93 | module_param_named(max_mcast_qp_attached, ib_ipath_max_mcast_qp_attached, | |
94 | uint, S_IWUSR | S_IRUGO); | |
95 | MODULE_PARM_DESC(max_mcast_qp_attached, | |
96 | "Maximum number of attached QPs to support"); | |
97 | ||
98 | unsigned int ib_ipath_max_srqs = 1024; | |
99 | module_param_named(max_srqs, ib_ipath_max_srqs, uint, S_IWUSR | S_IRUGO); | |
100 | MODULE_PARM_DESC(max_srqs, "Maximum number of SRQs to support"); | |
101 | ||
102 | unsigned int ib_ipath_max_srq_sges = 128; | |
103 | module_param_named(max_srq_sges, ib_ipath_max_srq_sges, | |
104 | uint, S_IWUSR | S_IRUGO); | |
105 | MODULE_PARM_DESC(max_srq_sges, "Maximum number of SRQ SGEs to support"); | |
106 | ||
107 | unsigned int ib_ipath_max_srq_wrs = 0x1FFFF; | |
108 | module_param_named(max_srq_wrs, ib_ipath_max_srq_wrs, | |
109 | uint, S_IWUSR | S_IRUGO); | |
110 | MODULE_PARM_DESC(max_srq_wrs, "Maximum number of SRQ WRs support"); | |
111 | ||
d821f02a BS |
112 | static unsigned int ib_ipath_disable_sma; |
113 | module_param_named(disable_sma, ib_ipath_disable_sma, uint, S_IWUSR | S_IRUGO); | |
9862874d | 114 | MODULE_PARM_DESC(disable_sma, "Disable the SMA"); |
d821f02a | 115 | |
e509be89 RC |
116 | /* |
117 | * Note that it is OK to post send work requests in the SQE and ERR | |
118 | * states; ipath_do_send() will process them and generate error | |
119 | * completions as per IB 1.2 C10-96. | |
120 | */ | |
6522108f BS |
121 | const int ib_ipath_state_ops[IB_QPS_ERR + 1] = { |
122 | [IB_QPS_RESET] = 0, | |
123 | [IB_QPS_INIT] = IPATH_POST_RECV_OK, | |
124 | [IB_QPS_RTR] = IPATH_POST_RECV_OK | IPATH_PROCESS_RECV_OK, | |
125 | [IB_QPS_RTS] = IPATH_POST_RECV_OK | IPATH_PROCESS_RECV_OK | | |
e509be89 RC |
126 | IPATH_POST_SEND_OK | IPATH_PROCESS_SEND_OK | |
127 | IPATH_PROCESS_NEXT_SEND_OK, | |
6522108f | 128 | [IB_QPS_SQD] = IPATH_POST_RECV_OK | IPATH_PROCESS_RECV_OK | |
e509be89 RC |
129 | IPATH_POST_SEND_OK | IPATH_PROCESS_SEND_OK, |
130 | [IB_QPS_SQE] = IPATH_POST_RECV_OK | IPATH_PROCESS_RECV_OK | | |
131 | IPATH_POST_SEND_OK | IPATH_FLUSH_SEND, | |
132 | [IB_QPS_ERR] = IPATH_POST_RECV_OK | IPATH_FLUSH_RECV | | |
133 | IPATH_POST_SEND_OK | IPATH_FLUSH_SEND, | |
6522108f BS |
134 | }; |
135 | ||
34b2aafe BS |
136 | struct ipath_ucontext { |
137 | struct ib_ucontext ibucontext; | |
138 | }; | |
139 | ||
140 | static inline struct ipath_ucontext *to_iucontext(struct ib_ucontext | |
141 | *ibucontext) | |
142 | { | |
143 | return container_of(ibucontext, struct ipath_ucontext, ibucontext); | |
144 | } | |
145 | ||
6522108f BS |
146 | /* |
147 | * Translate ib_wr_opcode into ib_wc_opcode. | |
148 | */ | |
149 | const enum ib_wc_opcode ib_ipath_wc_opcode[] = { | |
150 | [IB_WR_RDMA_WRITE] = IB_WC_RDMA_WRITE, | |
151 | [IB_WR_RDMA_WRITE_WITH_IMM] = IB_WC_RDMA_WRITE, | |
152 | [IB_WR_SEND] = IB_WC_SEND, | |
153 | [IB_WR_SEND_WITH_IMM] = IB_WC_SEND, | |
154 | [IB_WR_RDMA_READ] = IB_WC_RDMA_READ, | |
155 | [IB_WR_ATOMIC_CMP_AND_SWP] = IB_WC_COMP_SWAP, | |
156 | [IB_WR_ATOMIC_FETCH_AND_ADD] = IB_WC_FETCH_ADD | |
157 | }; | |
158 | ||
159 | /* | |
160 | * System image GUID. | |
161 | */ | |
ac2ae4c9 | 162 | static __be64 sys_image_guid; |
6522108f BS |
163 | |
164 | /** | |
165 | * ipath_copy_sge - copy data to SGE memory | |
166 | * @ss: the SGE state | |
167 | * @data: the data to copy | |
168 | * @length: the length of the data | |
169 | */ | |
170 | void ipath_copy_sge(struct ipath_sge_state *ss, void *data, u32 length) | |
171 | { | |
172 | struct ipath_sge *sge = &ss->sge; | |
173 | ||
174 | while (length) { | |
175 | u32 len = sge->length; | |
176 | ||
6522108f BS |
177 | if (len > length) |
178 | len = length; | |
30d149ab RC |
179 | if (len > sge->sge_length) |
180 | len = sge->sge_length; | |
181 | BUG_ON(len == 0); | |
6522108f BS |
182 | memcpy(sge->vaddr, data, len); |
183 | sge->vaddr += len; | |
184 | sge->length -= len; | |
185 | sge->sge_length -= len; | |
186 | if (sge->sge_length == 0) { | |
187 | if (--ss->num_sge) | |
188 | *sge = *ss->sg_list++; | |
189 | } else if (sge->length == 0 && sge->mr != NULL) { | |
190 | if (++sge->n >= IPATH_SEGSZ) { | |
191 | if (++sge->m >= sge->mr->mapsz) | |
192 | break; | |
193 | sge->n = 0; | |
194 | } | |
195 | sge->vaddr = | |
196 | sge->mr->map[sge->m]->segs[sge->n].vaddr; | |
197 | sge->length = | |
198 | sge->mr->map[sge->m]->segs[sge->n].length; | |
199 | } | |
200 | data += len; | |
201 | length -= len; | |
202 | } | |
203 | } | |
204 | ||
205 | /** | |
206 | * ipath_skip_sge - skip over SGE memory - XXX almost dup of prev func | |
207 | * @ss: the SGE state | |
208 | * @length: the number of bytes to skip | |
209 | */ | |
210 | void ipath_skip_sge(struct ipath_sge_state *ss, u32 length) | |
211 | { | |
212 | struct ipath_sge *sge = &ss->sge; | |
213 | ||
6522108f BS |
214 | while (length) { |
215 | u32 len = sge->length; | |
216 | ||
6522108f BS |
217 | if (len > length) |
218 | len = length; | |
30d149ab RC |
219 | if (len > sge->sge_length) |
220 | len = sge->sge_length; | |
221 | BUG_ON(len == 0); | |
6522108f BS |
222 | sge->vaddr += len; |
223 | sge->length -= len; | |
224 | sge->sge_length -= len; | |
225 | if (sge->sge_length == 0) { | |
226 | if (--ss->num_sge) | |
227 | *sge = *ss->sg_list++; | |
228 | } else if (sge->length == 0 && sge->mr != NULL) { | |
229 | if (++sge->n >= IPATH_SEGSZ) { | |
230 | if (++sge->m >= sge->mr->mapsz) | |
231 | break; | |
232 | sge->n = 0; | |
233 | } | |
234 | sge->vaddr = | |
235 | sge->mr->map[sge->m]->segs[sge->n].vaddr; | |
236 | sge->length = | |
237 | sge->mr->map[sge->m]->segs[sge->n].length; | |
238 | } | |
239 | length -= len; | |
240 | } | |
241 | } | |
242 | ||
124b4dcb DO |
243 | /* |
244 | * Count the number of DMA descriptors needed to send length bytes of data. | |
245 | * Don't modify the ipath_sge_state to get the count. | |
246 | * Return zero if any of the segments is not aligned. | |
247 | */ | |
248 | static u32 ipath_count_sge(struct ipath_sge_state *ss, u32 length) | |
249 | { | |
250 | struct ipath_sge *sg_list = ss->sg_list; | |
251 | struct ipath_sge sge = ss->sge; | |
252 | u8 num_sge = ss->num_sge; | |
253 | u32 ndesc = 1; /* count the header */ | |
254 | ||
255 | while (length) { | |
256 | u32 len = sge.length; | |
257 | ||
258 | if (len > length) | |
259 | len = length; | |
260 | if (len > sge.sge_length) | |
261 | len = sge.sge_length; | |
262 | BUG_ON(len == 0); | |
263 | if (((long) sge.vaddr & (sizeof(u32) - 1)) || | |
264 | (len != length && (len & (sizeof(u32) - 1)))) { | |
265 | ndesc = 0; | |
266 | break; | |
267 | } | |
268 | ndesc++; | |
269 | sge.vaddr += len; | |
270 | sge.length -= len; | |
271 | sge.sge_length -= len; | |
272 | if (sge.sge_length == 0) { | |
273 | if (--num_sge) | |
274 | sge = *sg_list++; | |
275 | } else if (sge.length == 0 && sge.mr != NULL) { | |
276 | if (++sge.n >= IPATH_SEGSZ) { | |
277 | if (++sge.m >= sge.mr->mapsz) | |
278 | break; | |
279 | sge.n = 0; | |
280 | } | |
281 | sge.vaddr = | |
282 | sge.mr->map[sge.m]->segs[sge.n].vaddr; | |
283 | sge.length = | |
284 | sge.mr->map[sge.m]->segs[sge.n].length; | |
285 | } | |
286 | length -= len; | |
287 | } | |
288 | return ndesc; | |
289 | } | |
290 | ||
291 | /* | |
292 | * Copy from the SGEs to the data buffer. | |
293 | */ | |
294 | static void ipath_copy_from_sge(void *data, struct ipath_sge_state *ss, | |
295 | u32 length) | |
296 | { | |
297 | struct ipath_sge *sge = &ss->sge; | |
298 | ||
299 | while (length) { | |
300 | u32 len = sge->length; | |
301 | ||
302 | if (len > length) | |
303 | len = length; | |
304 | if (len > sge->sge_length) | |
305 | len = sge->sge_length; | |
306 | BUG_ON(len == 0); | |
307 | memcpy(data, sge->vaddr, len); | |
308 | sge->vaddr += len; | |
309 | sge->length -= len; | |
310 | sge->sge_length -= len; | |
311 | if (sge->sge_length == 0) { | |
312 | if (--ss->num_sge) | |
313 | *sge = *ss->sg_list++; | |
314 | } else if (sge->length == 0 && sge->mr != NULL) { | |
315 | if (++sge->n >= IPATH_SEGSZ) { | |
316 | if (++sge->m >= sge->mr->mapsz) | |
317 | break; | |
318 | sge->n = 0; | |
319 | } | |
320 | sge->vaddr = | |
321 | sge->mr->map[sge->m]->segs[sge->n].vaddr; | |
322 | sge->length = | |
323 | sge->mr->map[sge->m]->segs[sge->n].length; | |
324 | } | |
325 | data += len; | |
326 | length -= len; | |
327 | } | |
328 | } | |
329 | ||
4ee97180 RC |
330 | /** |
331 | * ipath_post_one_send - post one RC, UC, or UD send work request | |
332 | * @qp: the QP to post on | |
333 | * @wr: the work request to send | |
334 | */ | |
335 | static int ipath_post_one_send(struct ipath_qp *qp, struct ib_send_wr *wr) | |
336 | { | |
337 | struct ipath_swqe *wqe; | |
338 | u32 next; | |
339 | int i; | |
340 | int j; | |
341 | int acc; | |
342 | int ret; | |
343 | unsigned long flags; | |
e441d634 | 344 | struct ipath_devdata *dd = to_idev(qp->ibqp.device)->dd; |
4ee97180 RC |
345 | |
346 | spin_lock_irqsave(&qp->s_lock, flags); | |
347 | ||
e441d634 YC |
348 | if (qp->ibqp.qp_type != IB_QPT_SMI && |
349 | !(dd->ipath_flags & IPATH_LINKACTIVE)) { | |
350 | ret = -ENETDOWN; | |
351 | goto bail; | |
352 | } | |
353 | ||
4ee97180 | 354 | /* Check that state is OK to post send. */ |
e509be89 RC |
355 | if (unlikely(!(ib_ipath_state_ops[qp->state] & IPATH_POST_SEND_OK))) |
356 | goto bail_inval; | |
4ee97180 RC |
357 | |
358 | /* IB spec says that num_sge == 0 is OK. */ | |
359 | if (wr->num_sge > qp->s_max_sge) | |
360 | goto bail_inval; | |
361 | ||
362 | /* | |
363 | * Don't allow RDMA reads or atomic operations on UC or | |
364 | * undefined operations. | |
365 | * Make sure buffer is large enough to hold the result for atomics. | |
366 | */ | |
367 | if (qp->ibqp.qp_type == IB_QPT_UC) { | |
368 | if ((unsigned) wr->opcode >= IB_WR_RDMA_READ) | |
369 | goto bail_inval; | |
370 | } else if (qp->ibqp.qp_type == IB_QPT_UD) { | |
371 | /* Check UD opcode */ | |
372 | if (wr->opcode != IB_WR_SEND && | |
373 | wr->opcode != IB_WR_SEND_WITH_IMM) | |
374 | goto bail_inval; | |
375 | /* Check UD destination address PD */ | |
376 | if (qp->ibqp.pd != wr->wr.ud.ah->pd) | |
377 | goto bail_inval; | |
378 | } else if ((unsigned) wr->opcode > IB_WR_ATOMIC_FETCH_AND_ADD) | |
379 | goto bail_inval; | |
380 | else if (wr->opcode >= IB_WR_ATOMIC_CMP_AND_SWP && | |
381 | (wr->num_sge == 0 || | |
382 | wr->sg_list[0].length < sizeof(u64) || | |
383 | wr->sg_list[0].addr & (sizeof(u64) - 1))) | |
384 | goto bail_inval; | |
385 | else if (wr->opcode >= IB_WR_RDMA_READ && !qp->s_max_rd_atomic) | |
386 | goto bail_inval; | |
387 | ||
388 | next = qp->s_head + 1; | |
389 | if (next >= qp->s_size) | |
390 | next = 0; | |
4187b915 RC |
391 | if (next == qp->s_last) { |
392 | ret = -ENOMEM; | |
393 | goto bail; | |
394 | } | |
4ee97180 RC |
395 | |
396 | wqe = get_swqe_ptr(qp, qp->s_head); | |
397 | wqe->wr = *wr; | |
4ee97180 RC |
398 | wqe->length = 0; |
399 | if (wr->num_sge) { | |
400 | acc = wr->opcode >= IB_WR_RDMA_READ ? | |
401 | IB_ACCESS_LOCAL_WRITE : 0; | |
402 | for (i = 0, j = 0; i < wr->num_sge; i++) { | |
403 | u32 length = wr->sg_list[i].length; | |
404 | int ok; | |
405 | ||
406 | if (length == 0) | |
407 | continue; | |
408 | ok = ipath_lkey_ok(qp, &wqe->sg_list[j], | |
409 | &wr->sg_list[i], acc); | |
410 | if (!ok) | |
411 | goto bail_inval; | |
412 | wqe->length += length; | |
413 | j++; | |
414 | } | |
415 | wqe->wr.num_sge = j; | |
416 | } | |
417 | if (qp->ibqp.qp_type == IB_QPT_UC || | |
418 | qp->ibqp.qp_type == IB_QPT_RC) { | |
419 | if (wqe->length > 0x80000000U) | |
420 | goto bail_inval; | |
421 | } else if (wqe->length > to_idev(qp->ibqp.device)->dd->ipath_ibmtu) | |
422 | goto bail_inval; | |
6e87d150 | 423 | wqe->ssn = qp->s_ssn++; |
4ee97180 RC |
424 | qp->s_head = next; |
425 | ||
426 | ret = 0; | |
427 | goto bail; | |
428 | ||
429 | bail_inval: | |
430 | ret = -EINVAL; | |
431 | bail: | |
432 | spin_unlock_irqrestore(&qp->s_lock, flags); | |
433 | return ret; | |
434 | } | |
435 | ||
6522108f BS |
436 | /** |
437 | * ipath_post_send - post a send on a QP | |
438 | * @ibqp: the QP to post the send on | |
439 | * @wr: the list of work requests to post | |
440 | * @bad_wr: the first bad WR is put here | |
441 | * | |
442 | * This may be called from interrupt context. | |
443 | */ | |
444 | static int ipath_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr, | |
445 | struct ib_send_wr **bad_wr) | |
446 | { | |
447 | struct ipath_qp *qp = to_iqp(ibqp); | |
448 | int err = 0; | |
449 | ||
6522108f | 450 | for (; wr; wr = wr->next) { |
4ee97180 | 451 | err = ipath_post_one_send(qp, wr); |
6522108f BS |
452 | if (err) { |
453 | *bad_wr = wr; | |
4ee97180 | 454 | goto bail; |
6522108f BS |
455 | } |
456 | } | |
457 | ||
4ee97180 RC |
458 | /* Try to do the send work in the caller's context. */ |
459 | ipath_do_send((unsigned long) qp); | |
460 | ||
6522108f BS |
461 | bail: |
462 | return err; | |
463 | } | |
464 | ||
465 | /** | |
466 | * ipath_post_receive - post a receive on a QP | |
467 | * @ibqp: the QP to post the receive on | |
468 | * @wr: the WR to post | |
469 | * @bad_wr: the first bad WR is put here | |
470 | * | |
471 | * This may be called from interrupt context. | |
472 | */ | |
473 | static int ipath_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr, | |
474 | struct ib_recv_wr **bad_wr) | |
475 | { | |
476 | struct ipath_qp *qp = to_iqp(ibqp); | |
373d9915 | 477 | struct ipath_rwq *wq = qp->r_rq.wq; |
6522108f BS |
478 | unsigned long flags; |
479 | int ret; | |
480 | ||
481 | /* Check that state is OK to post receive. */ | |
373d9915 | 482 | if (!(ib_ipath_state_ops[qp->state] & IPATH_POST_RECV_OK) || !wq) { |
6522108f BS |
483 | *bad_wr = wr; |
484 | ret = -EINVAL; | |
485 | goto bail; | |
486 | } | |
487 | ||
488 | for (; wr; wr = wr->next) { | |
489 | struct ipath_rwqe *wqe; | |
490 | u32 next; | |
373d9915 | 491 | int i; |
6522108f | 492 | |
373d9915 | 493 | if ((unsigned) wr->num_sge > qp->r_rq.max_sge) { |
6522108f | 494 | *bad_wr = wr; |
4187b915 | 495 | ret = -EINVAL; |
6522108f BS |
496 | goto bail; |
497 | } | |
498 | ||
499 | spin_lock_irqsave(&qp->r_rq.lock, flags); | |
373d9915 | 500 | next = wq->head + 1; |
6522108f BS |
501 | if (next >= qp->r_rq.size) |
502 | next = 0; | |
373d9915 | 503 | if (next == wq->tail) { |
6522108f BS |
504 | spin_unlock_irqrestore(&qp->r_rq.lock, flags); |
505 | *bad_wr = wr; | |
506 | ret = -ENOMEM; | |
507 | goto bail; | |
508 | } | |
509 | ||
373d9915 | 510 | wqe = get_rwqe_ptr(&qp->r_rq, wq->head); |
6522108f | 511 | wqe->wr_id = wr->wr_id; |
373d9915 RC |
512 | wqe->num_sge = wr->num_sge; |
513 | for (i = 0; i < wr->num_sge; i++) | |
514 | wqe->sg_list[i] = wr->sg_list[i]; | |
4fc570bc RC |
515 | /* Make sure queue entry is written before the head index. */ |
516 | smp_wmb(); | |
373d9915 | 517 | wq->head = next; |
6522108f BS |
518 | spin_unlock_irqrestore(&qp->r_rq.lock, flags); |
519 | } | |
520 | ret = 0; | |
521 | ||
522 | bail: | |
523 | return ret; | |
524 | } | |
525 | ||
526 | /** | |
527 | * ipath_qp_rcv - processing an incoming packet on a QP | |
528 | * @dev: the device the packet came on | |
529 | * @hdr: the packet header | |
530 | * @has_grh: true if the packet has a GRH | |
531 | * @data: the packet data | |
532 | * @tlen: the packet length | |
533 | * @qp: the QP the packet came on | |
534 | * | |
535 | * This is called from ipath_ib_rcv() to process an incoming packet | |
536 | * for the given QP. | |
537 | * Called at interrupt level. | |
538 | */ | |
539 | static void ipath_qp_rcv(struct ipath_ibdev *dev, | |
540 | struct ipath_ib_header *hdr, int has_grh, | |
541 | void *data, u32 tlen, struct ipath_qp *qp) | |
542 | { | |
543 | /* Check for valid receive state. */ | |
544 | if (!(ib_ipath_state_ops[qp->state] & IPATH_PROCESS_RECV_OK)) { | |
545 | dev->n_pkt_drops++; | |
546 | return; | |
547 | } | |
548 | ||
549 | switch (qp->ibqp.qp_type) { | |
550 | case IB_QPT_SMI: | |
551 | case IB_QPT_GSI: | |
d821f02a BS |
552 | if (ib_ipath_disable_sma) |
553 | break; | |
554 | /* FALLTHROUGH */ | |
6522108f BS |
555 | case IB_QPT_UD: |
556 | ipath_ud_rcv(dev, hdr, has_grh, data, tlen, qp); | |
557 | break; | |
558 | ||
559 | case IB_QPT_RC: | |
560 | ipath_rc_rcv(dev, hdr, has_grh, data, tlen, qp); | |
561 | break; | |
562 | ||
563 | case IB_QPT_UC: | |
564 | ipath_uc_rcv(dev, hdr, has_grh, data, tlen, qp); | |
565 | break; | |
566 | ||
567 | default: | |
568 | break; | |
569 | } | |
570 | } | |
571 | ||
572 | /** | |
b1c1b6a3 | 573 | * ipath_ib_rcv - process an incoming packet |
6522108f BS |
574 | * @arg: the device pointer |
575 | * @rhdr: the header of the packet | |
576 | * @data: the packet data | |
577 | * @tlen: the packet length | |
578 | * | |
579 | * This is called from ipath_kreceive() to process an incoming packet at | |
580 | * interrupt level. Tlen is the length of the header + data + CRC in bytes. | |
581 | */ | |
b1c1b6a3 BS |
582 | void ipath_ib_rcv(struct ipath_ibdev *dev, void *rhdr, void *data, |
583 | u32 tlen) | |
6522108f | 584 | { |
6522108f BS |
585 | struct ipath_ib_header *hdr = rhdr; |
586 | struct ipath_other_headers *ohdr; | |
587 | struct ipath_qp *qp; | |
588 | u32 qp_num; | |
589 | int lnh; | |
590 | u8 opcode; | |
591 | u16 lid; | |
592 | ||
593 | if (unlikely(dev == NULL)) | |
594 | goto bail; | |
595 | ||
596 | if (unlikely(tlen < 24)) { /* LRH+BTH+CRC */ | |
597 | dev->rcv_errors++; | |
598 | goto bail; | |
599 | } | |
600 | ||
601 | /* Check for a valid destination LID (see ch. 7.11.1). */ | |
602 | lid = be16_to_cpu(hdr->lrh[1]); | |
27b678dd | 603 | if (lid < IPATH_MULTICAST_LID_BASE) { |
542869a1 | 604 | lid &= ~((1 << dev->dd->ipath_lmc) - 1); |
34b2aafe | 605 | if (unlikely(lid != dev->dd->ipath_lid)) { |
6522108f BS |
606 | dev->rcv_errors++; |
607 | goto bail; | |
608 | } | |
609 | } | |
610 | ||
611 | /* Check for GRH */ | |
612 | lnh = be16_to_cpu(hdr->lrh[0]) & 3; | |
27b678dd | 613 | if (lnh == IPATH_LRH_BTH) |
6522108f | 614 | ohdr = &hdr->u.oth; |
27b678dd | 615 | else if (lnh == IPATH_LRH_GRH) |
6522108f BS |
616 | ohdr = &hdr->u.l.oth; |
617 | else { | |
618 | dev->rcv_errors++; | |
619 | goto bail; | |
620 | } | |
621 | ||
622 | opcode = be32_to_cpu(ohdr->bth[0]) >> 24; | |
623 | dev->opstats[opcode].n_bytes += tlen; | |
624 | dev->opstats[opcode].n_packets++; | |
625 | ||
626 | /* Get the destination QP number. */ | |
27b678dd BS |
627 | qp_num = be32_to_cpu(ohdr->bth[1]) & IPATH_QPN_MASK; |
628 | if (qp_num == IPATH_MULTICAST_QPN) { | |
6522108f BS |
629 | struct ipath_mcast *mcast; |
630 | struct ipath_mcast_qp *p; | |
631 | ||
5a7d4eea BS |
632 | if (lnh != IPATH_LRH_GRH) { |
633 | dev->n_pkt_drops++; | |
634 | goto bail; | |
635 | } | |
6522108f BS |
636 | mcast = ipath_mcast_find(&hdr->u.l.grh.dgid); |
637 | if (mcast == NULL) { | |
638 | dev->n_pkt_drops++; | |
639 | goto bail; | |
640 | } | |
641 | dev->n_multicast_rcv++; | |
642 | list_for_each_entry_rcu(p, &mcast->qp_list, list) | |
5a7d4eea | 643 | ipath_qp_rcv(dev, hdr, 1, data, tlen, p->qp); |
6522108f BS |
644 | /* |
645 | * Notify ipath_multicast_detach() if it is waiting for us | |
646 | * to finish. | |
647 | */ | |
648 | if (atomic_dec_return(&mcast->refcount) <= 1) | |
649 | wake_up(&mcast->wait); | |
650 | } else { | |
651 | qp = ipath_lookup_qpn(&dev->qp_table, qp_num); | |
652 | if (qp) { | |
653 | dev->n_unicast_rcv++; | |
27b678dd | 654 | ipath_qp_rcv(dev, hdr, lnh == IPATH_LRH_GRH, data, |
6522108f BS |
655 | tlen, qp); |
656 | /* | |
657 | * Notify ipath_destroy_qp() if it is waiting | |
658 | * for us to finish. | |
659 | */ | |
660 | if (atomic_dec_and_test(&qp->refcount)) | |
661 | wake_up(&qp->wait); | |
662 | } else | |
663 | dev->n_pkt_drops++; | |
664 | } | |
665 | ||
666 | bail:; | |
667 | } | |
668 | ||
669 | /** | |
670 | * ipath_ib_timer - verbs timer | |
671 | * @arg: the device pointer | |
672 | * | |
673 | * This is called from ipath_do_rcv_timer() at interrupt level to check for | |
674 | * QPs which need retransmits and to collect performance numbers. | |
675 | */ | |
da9aec7b | 676 | static void ipath_ib_timer(struct ipath_ibdev *dev) |
6522108f | 677 | { |
6522108f | 678 | struct ipath_qp *resend = NULL; |
e509be89 | 679 | struct ipath_qp *rnr = NULL; |
6522108f BS |
680 | struct list_head *last; |
681 | struct ipath_qp *qp; | |
682 | unsigned long flags; | |
683 | ||
684 | if (dev == NULL) | |
685 | return; | |
686 | ||
687 | spin_lock_irqsave(&dev->pending_lock, flags); | |
688 | /* Start filling the next pending queue. */ | |
689 | if (++dev->pending_index >= ARRAY_SIZE(dev->pending)) | |
690 | dev->pending_index = 0; | |
691 | /* Save any requests still in the new queue, they have timed out. */ | |
692 | last = &dev->pending[dev->pending_index]; | |
693 | while (!list_empty(last)) { | |
694 | qp = list_entry(last->next, struct ipath_qp, timerwait); | |
94b8d9f9 | 695 | list_del_init(&qp->timerwait); |
9b2017f1 BS |
696 | qp->timer_next = resend; |
697 | resend = qp; | |
698 | atomic_inc(&qp->refcount); | |
6522108f BS |
699 | } |
700 | last = &dev->rnrwait; | |
701 | if (!list_empty(last)) { | |
702 | qp = list_entry(last->next, struct ipath_qp, timerwait); | |
703 | if (--qp->s_rnr_timeout == 0) { | |
704 | do { | |
94b8d9f9 | 705 | list_del_init(&qp->timerwait); |
e509be89 RC |
706 | qp->timer_next = rnr; |
707 | rnr = qp; | |
708 | atomic_inc(&qp->refcount); | |
6522108f BS |
709 | if (list_empty(last)) |
710 | break; | |
711 | qp = list_entry(last->next, struct ipath_qp, | |
712 | timerwait); | |
713 | } while (qp->s_rnr_timeout == 0); | |
714 | } | |
715 | } | |
716 | /* | |
717 | * We should only be in the started state if pma_sample_start != 0 | |
718 | */ | |
719 | if (dev->pma_sample_status == IB_PMA_SAMPLE_STATUS_STARTED && | |
720 | --dev->pma_sample_start == 0) { | |
721 | dev->pma_sample_status = IB_PMA_SAMPLE_STATUS_RUNNING; | |
34b2aafe BS |
722 | ipath_snapshot_counters(dev->dd, &dev->ipath_sword, |
723 | &dev->ipath_rword, | |
724 | &dev->ipath_spkts, | |
725 | &dev->ipath_rpkts, | |
726 | &dev->ipath_xmit_wait); | |
6522108f BS |
727 | } |
728 | if (dev->pma_sample_status == IB_PMA_SAMPLE_STATUS_RUNNING) { | |
729 | if (dev->pma_sample_interval == 0) { | |
730 | u64 ta, tb, tc, td, te; | |
731 | ||
732 | dev->pma_sample_status = IB_PMA_SAMPLE_STATUS_DONE; | |
34b2aafe BS |
733 | ipath_snapshot_counters(dev->dd, &ta, &tb, |
734 | &tc, &td, &te); | |
6522108f BS |
735 | |
736 | dev->ipath_sword = ta - dev->ipath_sword; | |
737 | dev->ipath_rword = tb - dev->ipath_rword; | |
738 | dev->ipath_spkts = tc - dev->ipath_spkts; | |
739 | dev->ipath_rpkts = td - dev->ipath_rpkts; | |
740 | dev->ipath_xmit_wait = te - dev->ipath_xmit_wait; | |
741 | } | |
742 | else | |
743 | dev->pma_sample_interval--; | |
744 | } | |
745 | spin_unlock_irqrestore(&dev->pending_lock, flags); | |
746 | ||
747 | /* XXX What if timer fires again while this is running? */ | |
e509be89 RC |
748 | while (resend != NULL) { |
749 | qp = resend; | |
750 | resend = qp->timer_next; | |
751 | ||
6522108f | 752 | spin_lock_irqsave(&qp->s_lock, flags); |
e509be89 RC |
753 | if (qp->s_last != qp->s_tail && |
754 | ib_ipath_state_ops[qp->state] & IPATH_PROCESS_SEND_OK) { | |
6522108f | 755 | dev->n_timeouts++; |
53dc1ca1 | 756 | ipath_restart_rc(qp, qp->s_last_psn + 1); |
6522108f BS |
757 | } |
758 | spin_unlock_irqrestore(&qp->s_lock, flags); | |
759 | ||
e509be89 RC |
760 | /* Notify ipath_destroy_qp() if it is waiting. */ |
761 | if (atomic_dec_and_test(&qp->refcount)) | |
762 | wake_up(&qp->wait); | |
763 | } | |
764 | while (rnr != NULL) { | |
765 | qp = rnr; | |
766 | rnr = qp->timer_next; | |
767 | ||
768 | spin_lock_irqsave(&qp->s_lock, flags); | |
769 | if (ib_ipath_state_ops[qp->state] & IPATH_PROCESS_SEND_OK) | |
770 | ipath_schedule_send(qp); | |
771 | spin_unlock_irqrestore(&qp->s_lock, flags); | |
772 | ||
6522108f BS |
773 | /* Notify ipath_destroy_qp() if it is waiting. */ |
774 | if (atomic_dec_and_test(&qp->refcount)) | |
775 | wake_up(&qp->wait); | |
776 | } | |
6522108f BS |
777 | } |
778 | ||
34b2aafe BS |
779 | static void update_sge(struct ipath_sge_state *ss, u32 length) |
780 | { | |
781 | struct ipath_sge *sge = &ss->sge; | |
782 | ||
783 | sge->vaddr += length; | |
784 | sge->length -= length; | |
785 | sge->sge_length -= length; | |
786 | if (sge->sge_length == 0) { | |
787 | if (--ss->num_sge) | |
788 | *sge = *ss->sg_list++; | |
789 | } else if (sge->length == 0 && sge->mr != NULL) { | |
790 | if (++sge->n >= IPATH_SEGSZ) { | |
791 | if (++sge->m >= sge->mr->mapsz) | |
792 | return; | |
793 | sge->n = 0; | |
794 | } | |
795 | sge->vaddr = sge->mr->map[sge->m]->segs[sge->n].vaddr; | |
796 | sge->length = sge->mr->map[sge->m]->segs[sge->n].length; | |
797 | } | |
798 | } | |
799 | ||
800 | #ifdef __LITTLE_ENDIAN | |
801 | static inline u32 get_upper_bits(u32 data, u32 shift) | |
802 | { | |
803 | return data >> shift; | |
804 | } | |
805 | ||
806 | static inline u32 set_upper_bits(u32 data, u32 shift) | |
807 | { | |
808 | return data << shift; | |
809 | } | |
810 | ||
811 | static inline u32 clear_upper_bytes(u32 data, u32 n, u32 off) | |
812 | { | |
813 | data <<= ((sizeof(u32) - n) * BITS_PER_BYTE); | |
814 | data >>= ((sizeof(u32) - n - off) * BITS_PER_BYTE); | |
815 | return data; | |
816 | } | |
817 | #else | |
818 | static inline u32 get_upper_bits(u32 data, u32 shift) | |
819 | { | |
820 | return data << shift; | |
821 | } | |
822 | ||
823 | static inline u32 set_upper_bits(u32 data, u32 shift) | |
824 | { | |
825 | return data >> shift; | |
826 | } | |
827 | ||
828 | static inline u32 clear_upper_bytes(u32 data, u32 n, u32 off) | |
829 | { | |
830 | data >>= ((sizeof(u32) - n) * BITS_PER_BYTE); | |
831 | data <<= ((sizeof(u32) - n - off) * BITS_PER_BYTE); | |
832 | return data; | |
833 | } | |
834 | #endif | |
835 | ||
836 | static void copy_io(u32 __iomem *piobuf, struct ipath_sge_state *ss, | |
210d6ca3 | 837 | u32 length, unsigned flush_wc) |
34b2aafe BS |
838 | { |
839 | u32 extra = 0; | |
840 | u32 data = 0; | |
841 | u32 last; | |
842 | ||
843 | while (1) { | |
844 | u32 len = ss->sge.length; | |
845 | u32 off; | |
846 | ||
34b2aafe BS |
847 | if (len > length) |
848 | len = length; | |
849 | if (len > ss->sge.sge_length) | |
850 | len = ss->sge.sge_length; | |
4ee97180 | 851 | BUG_ON(len == 0); |
34b2aafe BS |
852 | /* If the source address is not aligned, try to align it. */ |
853 | off = (unsigned long)ss->sge.vaddr & (sizeof(u32) - 1); | |
854 | if (off) { | |
855 | u32 *addr = (u32 *)((unsigned long)ss->sge.vaddr & | |
856 | ~(sizeof(u32) - 1)); | |
857 | u32 v = get_upper_bits(*addr, off * BITS_PER_BYTE); | |
858 | u32 y; | |
859 | ||
860 | y = sizeof(u32) - off; | |
861 | if (len > y) | |
862 | len = y; | |
863 | if (len + extra >= sizeof(u32)) { | |
864 | data |= set_upper_bits(v, extra * | |
865 | BITS_PER_BYTE); | |
866 | len = sizeof(u32) - extra; | |
867 | if (len == length) { | |
868 | last = data; | |
869 | break; | |
870 | } | |
871 | __raw_writel(data, piobuf); | |
872 | piobuf++; | |
873 | extra = 0; | |
874 | data = 0; | |
875 | } else { | |
876 | /* Clear unused upper bytes */ | |
877 | data |= clear_upper_bytes(v, len, extra); | |
878 | if (len == length) { | |
879 | last = data; | |
880 | break; | |
881 | } | |
882 | extra += len; | |
883 | } | |
884 | } else if (extra) { | |
885 | /* Source address is aligned. */ | |
886 | u32 *addr = (u32 *) ss->sge.vaddr; | |
887 | int shift = extra * BITS_PER_BYTE; | |
888 | int ushift = 32 - shift; | |
889 | u32 l = len; | |
890 | ||
891 | while (l >= sizeof(u32)) { | |
892 | u32 v = *addr; | |
893 | ||
894 | data |= set_upper_bits(v, shift); | |
895 | __raw_writel(data, piobuf); | |
896 | data = get_upper_bits(v, ushift); | |
897 | piobuf++; | |
898 | addr++; | |
899 | l -= sizeof(u32); | |
900 | } | |
901 | /* | |
902 | * We still have 'extra' number of bytes leftover. | |
903 | */ | |
904 | if (l) { | |
905 | u32 v = *addr; | |
906 | ||
907 | if (l + extra >= sizeof(u32)) { | |
908 | data |= set_upper_bits(v, shift); | |
909 | len -= l + extra - sizeof(u32); | |
910 | if (len == length) { | |
911 | last = data; | |
912 | break; | |
913 | } | |
914 | __raw_writel(data, piobuf); | |
915 | piobuf++; | |
916 | extra = 0; | |
917 | data = 0; | |
918 | } else { | |
919 | /* Clear unused upper bytes */ | |
920 | data |= clear_upper_bytes(v, l, | |
921 | extra); | |
922 | if (len == length) { | |
923 | last = data; | |
924 | break; | |
925 | } | |
926 | extra += l; | |
927 | } | |
928 | } else if (len == length) { | |
929 | last = data; | |
930 | break; | |
931 | } | |
932 | } else if (len == length) { | |
933 | u32 w; | |
934 | ||
935 | /* | |
936 | * Need to round up for the last dword in the | |
937 | * packet. | |
938 | */ | |
939 | w = (len + 3) >> 2; | |
940 | __iowrite32_copy(piobuf, ss->sge.vaddr, w - 1); | |
941 | piobuf += w - 1; | |
942 | last = ((u32 *) ss->sge.vaddr)[w - 1]; | |
943 | break; | |
944 | } else { | |
945 | u32 w = len >> 2; | |
946 | ||
947 | __iowrite32_copy(piobuf, ss->sge.vaddr, w); | |
948 | piobuf += w; | |
949 | ||
950 | extra = len & (sizeof(u32) - 1); | |
951 | if (extra) { | |
952 | u32 v = ((u32 *) ss->sge.vaddr)[w]; | |
953 | ||
954 | /* Clear unused upper bytes */ | |
955 | data = clear_upper_bytes(v, extra, 0); | |
956 | } | |
957 | } | |
958 | update_sge(ss, len); | |
959 | length -= len; | |
960 | } | |
961 | /* Update address before sending packet. */ | |
962 | update_sge(ss, length); | |
210d6ca3 RC |
963 | if (flush_wc) { |
964 | /* must flush early everything before trigger word */ | |
965 | ipath_flush_wc(); | |
966 | __raw_writel(last, piobuf); | |
967 | /* be sure trigger word is written */ | |
968 | ipath_flush_wc(); | |
969 | } else | |
970 | __raw_writel(last, piobuf); | |
34b2aafe BS |
971 | } |
972 | ||
124b4dcb DO |
973 | /* |
974 | * Convert IB rate to delay multiplier. | |
975 | */ | |
976 | unsigned ipath_ib_rate_to_mult(enum ib_rate rate) | |
977 | { | |
978 | switch (rate) { | |
979 | case IB_RATE_2_5_GBPS: return 8; | |
980 | case IB_RATE_5_GBPS: return 4; | |
981 | case IB_RATE_10_GBPS: return 2; | |
982 | case IB_RATE_20_GBPS: return 1; | |
983 | default: return 0; | |
984 | } | |
985 | } | |
986 | ||
987 | /* | |
988 | * Convert delay multiplier to IB rate | |
989 | */ | |
990 | static enum ib_rate ipath_mult_to_ib_rate(unsigned mult) | |
991 | { | |
992 | switch (mult) { | |
993 | case 8: return IB_RATE_2_5_GBPS; | |
994 | case 4: return IB_RATE_5_GBPS; | |
995 | case 2: return IB_RATE_10_GBPS; | |
996 | case 1: return IB_RATE_20_GBPS; | |
997 | default: return IB_RATE_PORT_CURRENT; | |
998 | } | |
999 | } | |
1000 | ||
1001 | static inline struct ipath_verbs_txreq *get_txreq(struct ipath_ibdev *dev) | |
1002 | { | |
1003 | struct ipath_verbs_txreq *tx = NULL; | |
1004 | unsigned long flags; | |
1005 | ||
1006 | spin_lock_irqsave(&dev->pending_lock, flags); | |
1007 | if (!list_empty(&dev->txreq_free)) { | |
1008 | struct list_head *l = dev->txreq_free.next; | |
1009 | ||
1010 | list_del(l); | |
1011 | tx = list_entry(l, struct ipath_verbs_txreq, txreq.list); | |
1012 | } | |
1013 | spin_unlock_irqrestore(&dev->pending_lock, flags); | |
1014 | return tx; | |
1015 | } | |
1016 | ||
1017 | static inline void put_txreq(struct ipath_ibdev *dev, | |
1018 | struct ipath_verbs_txreq *tx) | |
1019 | { | |
1020 | unsigned long flags; | |
1021 | ||
1022 | spin_lock_irqsave(&dev->pending_lock, flags); | |
1023 | list_add(&tx->txreq.list, &dev->txreq_free); | |
1024 | spin_unlock_irqrestore(&dev->pending_lock, flags); | |
1025 | } | |
1026 | ||
1027 | static void sdma_complete(void *cookie, int status) | |
1028 | { | |
1029 | struct ipath_verbs_txreq *tx = cookie; | |
1030 | struct ipath_qp *qp = tx->qp; | |
1031 | struct ipath_ibdev *dev = to_idev(qp->ibqp.device); | |
52fd8ca6 | 1032 | unsigned long flags; |
e509be89 RC |
1033 | enum ib_wc_status ibs = status == IPATH_SDMA_TXREQ_S_OK ? |
1034 | IB_WC_SUCCESS : IB_WC_WR_FLUSH_ERR; | |
124b4dcb | 1035 | |
e509be89 RC |
1036 | if (atomic_dec_and_test(&qp->s_dma_busy)) { |
1037 | spin_lock_irqsave(&qp->s_lock, flags); | |
1038 | if (tx->wqe) | |
1039 | ipath_send_complete(qp, tx->wqe, ibs); | |
1040 | if ((ib_ipath_state_ops[qp->state] & IPATH_FLUSH_SEND && | |
1041 | qp->s_last != qp->s_head) || | |
1042 | (qp->s_flags & IPATH_S_WAIT_DMA)) | |
1043 | ipath_schedule_send(qp); | |
1044 | spin_unlock_irqrestore(&qp->s_lock, flags); | |
1045 | wake_up(&qp->wait_dma); | |
1046 | } else if (tx->wqe) { | |
1047 | spin_lock_irqsave(&qp->s_lock, flags); | |
124b4dcb | 1048 | ipath_send_complete(qp, tx->wqe, ibs); |
e509be89 | 1049 | spin_unlock_irqrestore(&qp->s_lock, flags); |
124b4dcb DO |
1050 | } |
1051 | ||
1052 | if (tx->txreq.flags & IPATH_SDMA_TXREQ_F_FREEBUF) | |
1053 | kfree(tx->txreq.map_addr); | |
1054 | put_txreq(dev, tx); | |
1055 | ||
1056 | if (atomic_dec_and_test(&qp->refcount)) | |
1057 | wake_up(&qp->wait); | |
1058 | } | |
1059 | ||
e509be89 RC |
1060 | static void decrement_dma_busy(struct ipath_qp *qp) |
1061 | { | |
52fd8ca6 | 1062 | unsigned long flags; |
e509be89 RC |
1063 | |
1064 | if (atomic_dec_and_test(&qp->s_dma_busy)) { | |
1065 | spin_lock_irqsave(&qp->s_lock, flags); | |
1066 | if ((ib_ipath_state_ops[qp->state] & IPATH_FLUSH_SEND && | |
1067 | qp->s_last != qp->s_head) || | |
1068 | (qp->s_flags & IPATH_S_WAIT_DMA)) | |
1069 | ipath_schedule_send(qp); | |
1070 | spin_unlock_irqrestore(&qp->s_lock, flags); | |
1071 | wake_up(&qp->wait_dma); | |
1072 | } | |
1073 | } | |
1074 | ||
124b4dcb DO |
1075 | /* |
1076 | * Compute the number of clock cycles of delay before sending the next packet. | |
1077 | * The multipliers reflect the number of clocks for the fastest rate so | |
1078 | * one tick at 4xDDR is 8 ticks at 1xSDR. | |
1079 | * If the destination port will take longer to receive a packet than | |
1080 | * the outgoing link can send it, we need to delay sending the next packet | |
1081 | * by the difference in time it takes the receiver to receive and the sender | |
1082 | * to send this packet. | |
1083 | * Note that this delay is always correct for UC and RC but not always | |
1084 | * optimal for UD. For UD, the destination HCA can be different for each | |
1085 | * packet, in which case, we could send packets to a different destination | |
1086 | * while "waiting" for the delay. The overhead for doing this without | |
1087 | * HW support is more than just paying the cost of delaying some packets | |
1088 | * unnecessarily. | |
1089 | */ | |
1090 | static inline unsigned ipath_pkt_delay(u32 plen, u8 snd_mult, u8 rcv_mult) | |
1091 | { | |
1092 | return (rcv_mult > snd_mult) ? | |
1093 | (plen * (rcv_mult - snd_mult) + 1) >> 1 : 0; | |
1094 | } | |
1095 | ||
1096 | static int ipath_verbs_send_dma(struct ipath_qp *qp, | |
1097 | struct ipath_ib_header *hdr, u32 hdrwords, | |
1098 | struct ipath_sge_state *ss, u32 len, | |
1099 | u32 plen, u32 dwords) | |
1100 | { | |
1101 | struct ipath_ibdev *dev = to_idev(qp->ibqp.device); | |
1102 | struct ipath_devdata *dd = dev->dd; | |
1103 | struct ipath_verbs_txreq *tx; | |
1104 | u32 *piobuf; | |
1105 | u32 control; | |
1106 | u32 ndesc; | |
1107 | int ret; | |
1108 | ||
1109 | tx = qp->s_tx; | |
1110 | if (tx) { | |
1111 | qp->s_tx = NULL; | |
1112 | /* resend previously constructed packet */ | |
e509be89 | 1113 | atomic_inc(&qp->s_dma_busy); |
124b4dcb | 1114 | ret = ipath_sdma_verbs_send(dd, tx->ss, tx->len, tx); |
e509be89 | 1115 | if (ret) { |
124b4dcb | 1116 | qp->s_tx = tx; |
e509be89 RC |
1117 | decrement_dma_busy(qp); |
1118 | } | |
124b4dcb DO |
1119 | goto bail; |
1120 | } | |
1121 | ||
1122 | tx = get_txreq(dev); | |
1123 | if (!tx) { | |
1124 | ret = -EBUSY; | |
1125 | goto bail; | |
1126 | } | |
1127 | ||
1128 | /* | |
1129 | * Get the saved delay count we computed for the previous packet | |
1130 | * and save the delay count for this packet to be used next time | |
1131 | * we get here. | |
1132 | */ | |
1133 | control = qp->s_pkt_delay; | |
1134 | qp->s_pkt_delay = ipath_pkt_delay(plen, dd->delay_mult, qp->s_dmult); | |
1135 | ||
1136 | tx->qp = qp; | |
1137 | atomic_inc(&qp->refcount); | |
1138 | tx->wqe = qp->s_wqe; | |
1139 | tx->txreq.callback = sdma_complete; | |
1140 | tx->txreq.callback_cookie = tx; | |
1141 | tx->txreq.flags = IPATH_SDMA_TXREQ_F_HEADTOHOST | | |
1142 | IPATH_SDMA_TXREQ_F_INTREQ | IPATH_SDMA_TXREQ_F_FREEDESC; | |
1143 | if (plen + 1 >= IPATH_SMALLBUF_DWORDS) | |
1144 | tx->txreq.flags |= IPATH_SDMA_TXREQ_F_USELARGEBUF; | |
1145 | ||
1146 | /* VL15 packets bypass credit check */ | |
1147 | if ((be16_to_cpu(hdr->lrh[0]) >> 12) == 15) { | |
1148 | control |= 1ULL << 31; | |
1149 | tx->txreq.flags |= IPATH_SDMA_TXREQ_F_VL15; | |
1150 | } | |
1151 | ||
1152 | if (len) { | |
1153 | /* | |
1154 | * Don't try to DMA if it takes more descriptors than | |
1155 | * the queue holds. | |
1156 | */ | |
1157 | ndesc = ipath_count_sge(ss, len); | |
1158 | if (ndesc >= dd->ipath_sdma_descq_cnt) | |
1159 | ndesc = 0; | |
1160 | } else | |
1161 | ndesc = 1; | |
1162 | if (ndesc) { | |
1163 | tx->hdr.pbc[0] = cpu_to_le32(plen); | |
1164 | tx->hdr.pbc[1] = cpu_to_le32(control); | |
1165 | memcpy(&tx->hdr.hdr, hdr, hdrwords << 2); | |
1166 | tx->txreq.sg_count = ndesc; | |
1167 | tx->map_len = (hdrwords + 2) << 2; | |
1168 | tx->txreq.map_addr = &tx->hdr; | |
e509be89 | 1169 | atomic_inc(&qp->s_dma_busy); |
124b4dcb DO |
1170 | ret = ipath_sdma_verbs_send(dd, ss, dwords, tx); |
1171 | if (ret) { | |
1172 | /* save ss and length in dwords */ | |
1173 | tx->ss = ss; | |
1174 | tx->len = dwords; | |
1175 | qp->s_tx = tx; | |
e509be89 | 1176 | decrement_dma_busy(qp); |
124b4dcb DO |
1177 | } |
1178 | goto bail; | |
1179 | } | |
1180 | ||
1181 | /* Allocate a buffer and copy the header and payload to it. */ | |
1182 | tx->map_len = (plen + 1) << 2; | |
1183 | piobuf = kmalloc(tx->map_len, GFP_ATOMIC); | |
1184 | if (unlikely(piobuf == NULL)) { | |
1185 | ret = -EBUSY; | |
1186 | goto err_tx; | |
1187 | } | |
1188 | tx->txreq.map_addr = piobuf; | |
1189 | tx->txreq.flags |= IPATH_SDMA_TXREQ_F_FREEBUF; | |
1190 | tx->txreq.sg_count = 1; | |
1191 | ||
1192 | *piobuf++ = (__force u32) cpu_to_le32(plen); | |
1193 | *piobuf++ = (__force u32) cpu_to_le32(control); | |
1194 | memcpy(piobuf, hdr, hdrwords << 2); | |
1195 | ipath_copy_from_sge(piobuf + hdrwords, ss, len); | |
1196 | ||
e509be89 | 1197 | atomic_inc(&qp->s_dma_busy); |
124b4dcb DO |
1198 | ret = ipath_sdma_verbs_send(dd, NULL, 0, tx); |
1199 | /* | |
1200 | * If we couldn't queue the DMA request, save the info | |
1201 | * and try again later rather than destroying the | |
1202 | * buffer and undoing the side effects of the copy. | |
1203 | */ | |
1204 | if (ret) { | |
1205 | tx->ss = NULL; | |
1206 | tx->len = 0; | |
1207 | qp->s_tx = tx; | |
e509be89 | 1208 | decrement_dma_busy(qp); |
124b4dcb DO |
1209 | } |
1210 | dev->n_unaligned++; | |
1211 | goto bail; | |
1212 | ||
1213 | err_tx: | |
1214 | if (atomic_dec_and_test(&qp->refcount)) | |
1215 | wake_up(&qp->wait); | |
1216 | put_txreq(dev, tx); | |
1217 | bail: | |
1218 | return ret; | |
1219 | } | |
1220 | ||
1221 | static int ipath_verbs_send_pio(struct ipath_qp *qp, | |
1222 | struct ipath_ib_header *ibhdr, u32 hdrwords, | |
4ee97180 RC |
1223 | struct ipath_sge_state *ss, u32 len, |
1224 | u32 plen, u32 dwords) | |
34b2aafe | 1225 | { |
4ee97180 | 1226 | struct ipath_devdata *dd = to_idev(qp->ibqp.device)->dd; |
124b4dcb | 1227 | u32 *hdr = (u32 *) ibhdr; |
34b2aafe | 1228 | u32 __iomem *piobuf; |
210d6ca3 | 1229 | unsigned flush_wc; |
124b4dcb | 1230 | u32 control; |
34b2aafe | 1231 | int ret; |
52fd8ca6 | 1232 | unsigned long flags; |
34b2aafe | 1233 | |
c4b4d16e | 1234 | piobuf = ipath_getpiobuf(dd, plen, NULL); |
34b2aafe BS |
1235 | if (unlikely(piobuf == NULL)) { |
1236 | ret = -EBUSY; | |
1237 | goto bail; | |
1238 | } | |
1239 | ||
1240 | /* | |
124b4dcb DO |
1241 | * Get the saved delay count we computed for the previous packet |
1242 | * and save the delay count for this packet to be used next time | |
1243 | * we get here. | |
1244 | */ | |
1245 | control = qp->s_pkt_delay; | |
1246 | qp->s_pkt_delay = ipath_pkt_delay(plen, dd->delay_mult, qp->s_dmult); | |
1247 | ||
1248 | /* VL15 packets bypass credit check */ | |
1249 | if ((be16_to_cpu(ibhdr->lrh[0]) >> 12) == 15) | |
1250 | control |= 1ULL << 31; | |
1251 | ||
1252 | /* | |
1253 | * Write the length to the control qword plus any needed flags. | |
34b2aafe BS |
1254 | * We have to flush after the PBC for correctness on some cpus |
1255 | * or WC buffer can be written out of order. | |
1256 | */ | |
124b4dcb | 1257 | writeq(((u64) control << 32) | plen, piobuf); |
34b2aafe | 1258 | piobuf += 2; |
210d6ca3 RC |
1259 | |
1260 | flush_wc = dd->ipath_flags & IPATH_PIO_FLUSH_WC; | |
34b2aafe BS |
1261 | if (len == 0) { |
1262 | /* | |
1263 | * If there is just the header portion, must flush before | |
1264 | * writing last word of header for correctness, and after | |
1265 | * the last header word (trigger word). | |
1266 | */ | |
210d6ca3 RC |
1267 | if (flush_wc) { |
1268 | ipath_flush_wc(); | |
1269 | __iowrite32_copy(piobuf, hdr, hdrwords - 1); | |
1270 | ipath_flush_wc(); | |
1271 | __raw_writel(hdr[hdrwords - 1], piobuf + hdrwords - 1); | |
1272 | ipath_flush_wc(); | |
1273 | } else | |
1274 | __iowrite32_copy(piobuf, hdr, hdrwords); | |
1275 | goto done; | |
34b2aafe BS |
1276 | } |
1277 | ||
210d6ca3 RC |
1278 | if (flush_wc) |
1279 | ipath_flush_wc(); | |
34b2aafe BS |
1280 | __iowrite32_copy(piobuf, hdr, hdrwords); |
1281 | piobuf += hdrwords; | |
1282 | ||
1283 | /* The common case is aligned and contained in one segment. */ | |
1284 | if (likely(ss->num_sge == 1 && len <= ss->sge.length && | |
1285 | !((unsigned long)ss->sge.vaddr & (sizeof(u32) - 1)))) { | |
34b2aafe BS |
1286 | u32 *addr = (u32 *) ss->sge.vaddr; |
1287 | ||
1288 | /* Update address before sending packet. */ | |
1289 | update_sge(ss, len); | |
210d6ca3 RC |
1290 | if (flush_wc) { |
1291 | __iowrite32_copy(piobuf, addr, dwords - 1); | |
1292 | /* must flush early everything before trigger word */ | |
1293 | ipath_flush_wc(); | |
1294 | __raw_writel(addr[dwords - 1], piobuf + dwords - 1); | |
1295 | /* be sure trigger word is written */ | |
1296 | ipath_flush_wc(); | |
1297 | } else | |
1298 | __iowrite32_copy(piobuf, addr, dwords); | |
1299 | goto done; | |
34b2aafe | 1300 | } |
210d6ca3 RC |
1301 | copy_io(piobuf, ss, len, flush_wc); |
1302 | done: | |
e509be89 RC |
1303 | if (qp->s_wqe) { |
1304 | spin_lock_irqsave(&qp->s_lock, flags); | |
4ee97180 | 1305 | ipath_send_complete(qp, qp->s_wqe, IB_WC_SUCCESS); |
e509be89 RC |
1306 | spin_unlock_irqrestore(&qp->s_lock, flags); |
1307 | } | |
34b2aafe | 1308 | ret = 0; |
34b2aafe BS |
1309 | bail: |
1310 | return ret; | |
1311 | } | |
1312 | ||
4ee97180 RC |
1313 | /** |
1314 | * ipath_verbs_send - send a packet | |
1315 | * @qp: the QP to send on | |
1316 | * @hdr: the packet header | |
9e2ef36b | 1317 | * @hdrwords: the number of 32-bit words in the header |
4ee97180 RC |
1318 | * @ss: the SGE to send |
1319 | * @len: the length of the packet in bytes | |
1320 | */ | |
1321 | int ipath_verbs_send(struct ipath_qp *qp, struct ipath_ib_header *hdr, | |
1322 | u32 hdrwords, struct ipath_sge_state *ss, u32 len) | |
1323 | { | |
49739b3e | 1324 | struct ipath_devdata *dd = to_idev(qp->ibqp.device)->dd; |
4ee97180 RC |
1325 | u32 plen; |
1326 | int ret; | |
1327 | u32 dwords = (len + 3) >> 2; | |
1328 | ||
9e2ef36b DO |
1329 | /* |
1330 | * Calculate the send buffer trigger address. | |
1331 | * The +1 counts for the pbc control dword following the pbc length. | |
1332 | */ | |
4ee97180 RC |
1333 | plen = hdrwords + dwords + 1; |
1334 | ||
124b4dcb DO |
1335 | /* |
1336 | * VL15 packets (IB_QPT_SMI) will always use PIO, so we | |
1337 | * can defer SDMA restart until link goes ACTIVE without | |
1338 | * worrying about just how we got there. | |
1339 | */ | |
e509be89 RC |
1340 | if (qp->ibqp.qp_type == IB_QPT_SMI || |
1341 | !(dd->ipath_flags & IPATH_HAS_SEND_DMA)) | |
124b4dcb DO |
1342 | ret = ipath_verbs_send_pio(qp, hdr, hdrwords, ss, len, |
1343 | plen, dwords); | |
124b4dcb | 1344 | else |
e509be89 | 1345 | ret = ipath_verbs_send_dma(qp, hdr, hdrwords, ss, len, |
124b4dcb | 1346 | plen, dwords); |
4ee97180 RC |
1347 | |
1348 | return ret; | |
1349 | } | |
1350 | ||
34b2aafe BS |
1351 | int ipath_snapshot_counters(struct ipath_devdata *dd, u64 *swords, |
1352 | u64 *rwords, u64 *spkts, u64 *rpkts, | |
1353 | u64 *xmit_wait) | |
1354 | { | |
1355 | int ret; | |
1356 | ||
1357 | if (!(dd->ipath_flags & IPATH_INITTED)) { | |
1358 | /* no hardware, freeze, etc. */ | |
34b2aafe BS |
1359 | ret = -EINVAL; |
1360 | goto bail; | |
1361 | } | |
1362 | *swords = ipath_snap_cntr(dd, dd->ipath_cregs->cr_wordsendcnt); | |
1363 | *rwords = ipath_snap_cntr(dd, dd->ipath_cregs->cr_wordrcvcnt); | |
1364 | *spkts = ipath_snap_cntr(dd, dd->ipath_cregs->cr_pktsendcnt); | |
1365 | *rpkts = ipath_snap_cntr(dd, dd->ipath_cregs->cr_pktrcvcnt); | |
1366 | *xmit_wait = ipath_snap_cntr(dd, dd->ipath_cregs->cr_sendstallcnt); | |
1367 | ||
1368 | ret = 0; | |
1369 | ||
1370 | bail: | |
1371 | return ret; | |
1372 | } | |
1373 | ||
1374 | /** | |
1375 | * ipath_get_counters - get various chip counters | |
1376 | * @dd: the infinipath device | |
1377 | * @cntrs: counters are placed here | |
1378 | * | |
1379 | * Return the counters needed by recv_pma_get_portcounters(). | |
1380 | */ | |
1381 | int ipath_get_counters(struct ipath_devdata *dd, | |
1382 | struct ipath_verbs_counters *cntrs) | |
1383 | { | |
4ee97180 | 1384 | struct ipath_cregs const *crp = dd->ipath_cregs; |
34b2aafe BS |
1385 | int ret; |
1386 | ||
1387 | if (!(dd->ipath_flags & IPATH_INITTED)) { | |
1388 | /* no hardware, freeze, etc. */ | |
34b2aafe BS |
1389 | ret = -EINVAL; |
1390 | goto bail; | |
1391 | } | |
1392 | cntrs->symbol_error_counter = | |
4ee97180 | 1393 | ipath_snap_cntr(dd, crp->cr_ibsymbolerrcnt); |
34b2aafe | 1394 | cntrs->link_error_recovery_counter = |
4ee97180 | 1395 | ipath_snap_cntr(dd, crp->cr_iblinkerrrecovcnt); |
34b2aafe BS |
1396 | /* |
1397 | * The link downed counter counts when the other side downs the | |
1398 | * connection. We add in the number of times we downed the link | |
1399 | * due to local link integrity errors to compensate. | |
1400 | */ | |
1401 | cntrs->link_downed_counter = | |
4ee97180 | 1402 | ipath_snap_cntr(dd, crp->cr_iblinkdowncnt); |
34b2aafe | 1403 | cntrs->port_rcv_errors = |
4ee97180 RC |
1404 | ipath_snap_cntr(dd, crp->cr_rxdroppktcnt) + |
1405 | ipath_snap_cntr(dd, crp->cr_rcvovflcnt) + | |
1406 | ipath_snap_cntr(dd, crp->cr_portovflcnt) + | |
1407 | ipath_snap_cntr(dd, crp->cr_err_rlencnt) + | |
1408 | ipath_snap_cntr(dd, crp->cr_invalidrlencnt) + | |
1409 | ipath_snap_cntr(dd, crp->cr_errlinkcnt) + | |
1410 | ipath_snap_cntr(dd, crp->cr_erricrccnt) + | |
1411 | ipath_snap_cntr(dd, crp->cr_errvcrccnt) + | |
1412 | ipath_snap_cntr(dd, crp->cr_errlpcrccnt) + | |
1413 | ipath_snap_cntr(dd, crp->cr_badformatcnt) + | |
2c9446a1 | 1414 | dd->ipath_rxfc_unsupvl_errs; |
124b4dcb DO |
1415 | if (crp->cr_rxotherlocalphyerrcnt) |
1416 | cntrs->port_rcv_errors += | |
1417 | ipath_snap_cntr(dd, crp->cr_rxotherlocalphyerrcnt); | |
1418 | if (crp->cr_rxvlerrcnt) | |
1419 | cntrs->port_rcv_errors += | |
1420 | ipath_snap_cntr(dd, crp->cr_rxvlerrcnt); | |
34b2aafe | 1421 | cntrs->port_rcv_remphys_errors = |
4ee97180 RC |
1422 | ipath_snap_cntr(dd, crp->cr_rcvebpcnt); |
1423 | cntrs->port_xmit_discards = ipath_snap_cntr(dd, crp->cr_unsupvlcnt); | |
1424 | cntrs->port_xmit_data = ipath_snap_cntr(dd, crp->cr_wordsendcnt); | |
1425 | cntrs->port_rcv_data = ipath_snap_cntr(dd, crp->cr_wordrcvcnt); | |
1426 | cntrs->port_xmit_packets = ipath_snap_cntr(dd, crp->cr_pktsendcnt); | |
1427 | cntrs->port_rcv_packets = ipath_snap_cntr(dd, crp->cr_pktrcvcnt); | |
2c9446a1 | 1428 | cntrs->local_link_integrity_errors = |
124b4dcb DO |
1429 | crp->cr_locallinkintegrityerrcnt ? |
1430 | ipath_snap_cntr(dd, crp->cr_locallinkintegrityerrcnt) : | |
1431 | ((dd->ipath_flags & IPATH_GPIO_ERRINTRS) ? | |
1432 | dd->ipath_lli_errs : dd->ipath_lli_errors); | |
1433 | cntrs->excessive_buffer_overrun_errors = | |
1434 | crp->cr_excessbufferovflcnt ? | |
1435 | ipath_snap_cntr(dd, crp->cr_excessbufferovflcnt) : | |
1436 | dd->ipath_overrun_thresh_errs; | |
1437 | cntrs->vl15_dropped = crp->cr_vl15droppedpktcnt ? | |
1438 | ipath_snap_cntr(dd, crp->cr_vl15droppedpktcnt) : 0; | |
34b2aafe BS |
1439 | |
1440 | ret = 0; | |
1441 | ||
1442 | bail: | |
1443 | return ret; | |
1444 | } | |
1445 | ||
6522108f BS |
1446 | /** |
1447 | * ipath_ib_piobufavail - callback when a PIO buffer is available | |
1448 | * @arg: the device pointer | |
1449 | * | |
1450 | * This is called from ipath_intr() at interrupt level when a PIO buffer is | |
1451 | * available after ipath_verbs_send() returned an error that no buffers were | |
9b2017f1 | 1452 | * available. Return 1 if we consumed all the PIO buffers and we still have |
e509be89 | 1453 | * QPs waiting for buffers (for now, just restart the send tasklet and |
9b2017f1 | 1454 | * return zero). |
6522108f | 1455 | */ |
b1c1b6a3 | 1456 | int ipath_ib_piobufavail(struct ipath_ibdev *dev) |
6522108f | 1457 | { |
e509be89 RC |
1458 | struct list_head *list; |
1459 | struct ipath_qp *qplist; | |
6522108f BS |
1460 | struct ipath_qp *qp; |
1461 | unsigned long flags; | |
1462 | ||
1463 | if (dev == NULL) | |
1464 | goto bail; | |
1465 | ||
e509be89 RC |
1466 | list = &dev->piowait; |
1467 | qplist = NULL; | |
1468 | ||
6522108f | 1469 | spin_lock_irqsave(&dev->pending_lock, flags); |
e509be89 RC |
1470 | while (!list_empty(list)) { |
1471 | qp = list_entry(list->next, struct ipath_qp, piowait); | |
94b8d9f9 | 1472 | list_del_init(&qp->piowait); |
e509be89 RC |
1473 | qp->pio_next = qplist; |
1474 | qplist = qp; | |
1475 | atomic_inc(&qp->refcount); | |
6522108f BS |
1476 | } |
1477 | spin_unlock_irqrestore(&dev->pending_lock, flags); | |
1478 | ||
e509be89 RC |
1479 | while (qplist != NULL) { |
1480 | qp = qplist; | |
1481 | qplist = qp->pio_next; | |
1482 | ||
1483 | spin_lock_irqsave(&qp->s_lock, flags); | |
1484 | if (ib_ipath_state_ops[qp->state] & IPATH_PROCESS_SEND_OK) | |
1485 | ipath_schedule_send(qp); | |
1486 | spin_unlock_irqrestore(&qp->s_lock, flags); | |
1487 | ||
1488 | /* Notify ipath_destroy_qp() if it is waiting. */ | |
1489 | if (atomic_dec_and_test(&qp->refcount)) | |
1490 | wake_up(&qp->wait); | |
1491 | } | |
1492 | ||
6522108f | 1493 | bail: |
9b2017f1 | 1494 | return 0; |
6522108f BS |
1495 | } |
1496 | ||
1497 | static int ipath_query_device(struct ib_device *ibdev, | |
1498 | struct ib_device_attr *props) | |
1499 | { | |
1500 | struct ipath_ibdev *dev = to_idev(ibdev); | |
6522108f BS |
1501 | |
1502 | memset(props, 0, sizeof(*props)); | |
1503 | ||
1504 | props->device_cap_flags = IB_DEVICE_BAD_PKEY_CNTR | | |
1505 | IB_DEVICE_BAD_QKEY_CNTR | IB_DEVICE_SHUTDOWN_PORT | | |
03031f71 RC |
1506 | IB_DEVICE_SYS_IMAGE_GUID | IB_DEVICE_RC_RNR_NAK_GEN | |
1507 | IB_DEVICE_PORT_ACTIVE_EVENT | IB_DEVICE_SRQ_RESIZE; | |
c9f79bdc | 1508 | props->page_size_cap = PAGE_SIZE; |
df866619 RC |
1509 | props->vendor_id = |
1510 | IPATH_SRC_OUI_1 << 16 | IPATH_SRC_OUI_2 << 8 | IPATH_SRC_OUI_3; | |
34b2aafe BS |
1511 | props->vendor_part_id = dev->dd->ipath_deviceid; |
1512 | props->hw_ver = dev->dd->ipath_pcirev; | |
6522108f BS |
1513 | |
1514 | props->sys_image_guid = dev->sys_image_guid; | |
1515 | ||
1516 | props->max_mr_size = ~0ull; | |
0b81e4f7 | 1517 | props->max_qp = ib_ipath_max_qps; |
fe62546a BS |
1518 | props->max_qp_wr = ib_ipath_max_qp_wrs; |
1519 | props->max_sge = ib_ipath_max_sges; | |
1520 | props->max_cq = ib_ipath_max_cqs; | |
1521 | props->max_ah = ib_ipath_max_ahs; | |
1522 | props->max_cqe = ib_ipath_max_cqes; | |
1523 | props->max_mr = dev->lk_table.max; | |
fdc7215f RW |
1524 | props->max_fmr = dev->lk_table.max; |
1525 | props->max_map_per_fmr = 32767; | |
fe62546a | 1526 | props->max_pd = ib_ipath_max_pds; |
3859e39d RC |
1527 | props->max_qp_rd_atom = IPATH_MAX_RDMA_ATOMIC; |
1528 | props->max_qp_init_rd_atom = 255; | |
6522108f | 1529 | /* props->max_res_rd_atom */ |
fe62546a BS |
1530 | props->max_srq = ib_ipath_max_srqs; |
1531 | props->max_srq_wr = ib_ipath_max_srq_wrs; | |
1532 | props->max_srq_sge = ib_ipath_max_srq_sges; | |
6522108f | 1533 | /* props->local_ca_ack_delay */ |
3859e39d | 1534 | props->atomic_cap = IB_ATOMIC_GLOB; |
34b2aafe | 1535 | props->max_pkeys = ipath_get_npkeys(dev->dd); |
fe62546a BS |
1536 | props->max_mcast_grp = ib_ipath_max_mcast_grps; |
1537 | props->max_mcast_qp_attach = ib_ipath_max_mcast_qp_attached; | |
6522108f BS |
1538 | props->max_total_mcast_qp_attach = props->max_mcast_qp_attach * |
1539 | props->max_mcast_grp; | |
1540 | ||
1541 | return 0; | |
1542 | } | |
1543 | ||
3d68ea32 RC |
1544 | const u8 ipath_cvt_physportstate[32] = { |
1545 | [INFINIPATH_IBCS_LT_STATE_DISABLED] = IB_PHYSPORTSTATE_DISABLED, | |
1546 | [INFINIPATH_IBCS_LT_STATE_LINKUP] = IB_PHYSPORTSTATE_LINKUP, | |
1547 | [INFINIPATH_IBCS_LT_STATE_POLLACTIVE] = IB_PHYSPORTSTATE_POLL, | |
1548 | [INFINIPATH_IBCS_LT_STATE_POLLQUIET] = IB_PHYSPORTSTATE_POLL, | |
1549 | [INFINIPATH_IBCS_LT_STATE_SLEEPDELAY] = IB_PHYSPORTSTATE_SLEEP, | |
1550 | [INFINIPATH_IBCS_LT_STATE_SLEEPQUIET] = IB_PHYSPORTSTATE_SLEEP, | |
1551 | [INFINIPATH_IBCS_LT_STATE_CFGDEBOUNCE] = | |
1552 | IB_PHYSPORTSTATE_CFG_TRAIN, | |
1553 | [INFINIPATH_IBCS_LT_STATE_CFGRCVFCFG] = | |
1554 | IB_PHYSPORTSTATE_CFG_TRAIN, | |
1555 | [INFINIPATH_IBCS_LT_STATE_CFGWAITRMT] = | |
1556 | IB_PHYSPORTSTATE_CFG_TRAIN, | |
1557 | [INFINIPATH_IBCS_LT_STATE_CFGIDLE] = IB_PHYSPORTSTATE_CFG_TRAIN, | |
1558 | [INFINIPATH_IBCS_LT_STATE_RECOVERRETRAIN] = | |
1559 | IB_PHYSPORTSTATE_LINK_ERR_RECOVER, | |
1560 | [INFINIPATH_IBCS_LT_STATE_RECOVERWAITRMT] = | |
1561 | IB_PHYSPORTSTATE_LINK_ERR_RECOVER, | |
1562 | [INFINIPATH_IBCS_LT_STATE_RECOVERIDLE] = | |
1563 | IB_PHYSPORTSTATE_LINK_ERR_RECOVER, | |
1564 | [0x10] = IB_PHYSPORTSTATE_CFG_TRAIN, | |
1565 | [0x11] = IB_PHYSPORTSTATE_CFG_TRAIN, | |
1566 | [0x12] = IB_PHYSPORTSTATE_CFG_TRAIN, | |
1567 | [0x13] = IB_PHYSPORTSTATE_CFG_TRAIN, | |
1568 | [0x14] = IB_PHYSPORTSTATE_CFG_TRAIN, | |
1569 | [0x15] = IB_PHYSPORTSTATE_CFG_TRAIN, | |
1570 | [0x16] = IB_PHYSPORTSTATE_CFG_TRAIN, | |
1571 | [0x17] = IB_PHYSPORTSTATE_CFG_TRAIN | |
6522108f BS |
1572 | }; |
1573 | ||
34b2aafe BS |
1574 | u32 ipath_get_cr_errpkey(struct ipath_devdata *dd) |
1575 | { | |
1576 | return ipath_read_creg32(dd, dd->ipath_cregs->cr_errpkey); | |
1577 | } | |
1578 | ||
6522108f BS |
1579 | static int ipath_query_port(struct ib_device *ibdev, |
1580 | u8 port, struct ib_port_attr *props) | |
1581 | { | |
1582 | struct ipath_ibdev *dev = to_idev(ibdev); | |
4ee97180 | 1583 | struct ipath_devdata *dd = dev->dd; |
6522108f | 1584 | enum ib_mtu mtu; |
4ee97180 | 1585 | u16 lid = dd->ipath_lid; |
6522108f BS |
1586 | u64 ibcstat; |
1587 | ||
1588 | memset(props, 0, sizeof(*props)); | |
9c3da099 | 1589 | props->lid = lid ? lid : be16_to_cpu(IB_LID_PERMISSIVE); |
542869a1 | 1590 | props->lmc = dd->ipath_lmc; |
6522108f BS |
1591 | props->sm_lid = dev->sm_lid; |
1592 | props->sm_sl = dev->sm_sl; | |
4ee97180 | 1593 | ibcstat = dd->ipath_lastibcstat; |
a51a2513 RC |
1594 | /* map LinkState to IB portinfo values. */ |
1595 | props->state = ipath_ib_linkstate(dd, ibcstat) + 1; | |
1596 | ||
6522108f | 1597 | /* See phys_state_show() */ |
3d68ea32 RC |
1598 | props->phys_state = /* MEA: assumes shift == 0 */ |
1599 | ipath_cvt_physportstate[dd->ipath_lastibcstat & | |
1600 | dd->ibcs_lts_mask]; | |
6522108f BS |
1601 | props->port_cap_flags = dev->port_cap_flags; |
1602 | props->gid_tbl_len = 1; | |
c100f622 | 1603 | props->max_msg_sz = 0x80000000; |
4ee97180 RC |
1604 | props->pkey_tbl_len = ipath_get_npkeys(dd); |
1605 | props->bad_pkey_cntr = ipath_get_cr_errpkey(dd) - | |
443a64ab | 1606 | dev->z_pkey_violations; |
6522108f | 1607 | props->qkey_viol_cntr = dev->qkey_violations; |
a51a2513 | 1608 | props->active_width = dd->ipath_link_width_active; |
6522108f | 1609 | /* See rate_show() */ |
a51a2513 | 1610 | props->active_speed = dd->ipath_link_speed_active; |
6522108f BS |
1611 | props->max_vl_num = 1; /* VLCap = VL0 */ |
1612 | props->init_type_reply = 0; | |
1613 | ||
826d8010 | 1614 | props->max_mtu = ipath_mtu4096 ? IB_MTU_4096 : IB_MTU_2048; |
4ee97180 | 1615 | switch (dd->ipath_ibmtu) { |
6522108f BS |
1616 | case 4096: |
1617 | mtu = IB_MTU_4096; | |
1618 | break; | |
1619 | case 2048: | |
1620 | mtu = IB_MTU_2048; | |
1621 | break; | |
1622 | case 1024: | |
1623 | mtu = IB_MTU_1024; | |
1624 | break; | |
1625 | case 512: | |
1626 | mtu = IB_MTU_512; | |
1627 | break; | |
1628 | case 256: | |
1629 | mtu = IB_MTU_256; | |
1630 | break; | |
1631 | default: | |
1632 | mtu = IB_MTU_2048; | |
1633 | } | |
1634 | props->active_mtu = mtu; | |
1635 | props->subnet_timeout = dev->subnet_timeout; | |
1636 | ||
1637 | return 0; | |
1638 | } | |
1639 | ||
1640 | static int ipath_modify_device(struct ib_device *device, | |
1641 | int device_modify_mask, | |
1642 | struct ib_device_modify *device_modify) | |
1643 | { | |
1644 | int ret; | |
1645 | ||
1646 | if (device_modify_mask & ~(IB_DEVICE_MODIFY_SYS_IMAGE_GUID | | |
1647 | IB_DEVICE_MODIFY_NODE_DESC)) { | |
1648 | ret = -EOPNOTSUPP; | |
1649 | goto bail; | |
1650 | } | |
1651 | ||
1652 | if (device_modify_mask & IB_DEVICE_MODIFY_NODE_DESC) | |
1653 | memcpy(device->node_desc, device_modify->node_desc, 64); | |
1654 | ||
1655 | if (device_modify_mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID) | |
1656 | to_idev(device)->sys_image_guid = | |
1657 | cpu_to_be64(device_modify->sys_image_guid); | |
1658 | ||
1659 | ret = 0; | |
1660 | ||
1661 | bail: | |
1662 | return ret; | |
1663 | } | |
1664 | ||
1665 | static int ipath_modify_port(struct ib_device *ibdev, | |
1666 | u8 port, int port_modify_mask, | |
1667 | struct ib_port_modify *props) | |
1668 | { | |
1669 | struct ipath_ibdev *dev = to_idev(ibdev); | |
1670 | ||
1671 | dev->port_cap_flags |= props->set_port_cap_mask; | |
1672 | dev->port_cap_flags &= ~props->clr_port_cap_mask; | |
1673 | if (port_modify_mask & IB_PORT_SHUTDOWN) | |
34b2aafe | 1674 | ipath_set_linkstate(dev->dd, IPATH_IB_LINKDOWN); |
6522108f BS |
1675 | if (port_modify_mask & IB_PORT_RESET_QKEY_CNTR) |
1676 | dev->qkey_violations = 0; | |
1677 | return 0; | |
1678 | } | |
1679 | ||
1680 | static int ipath_query_gid(struct ib_device *ibdev, u8 port, | |
1681 | int index, union ib_gid *gid) | |
1682 | { | |
1683 | struct ipath_ibdev *dev = to_idev(ibdev); | |
1684 | int ret; | |
1685 | ||
1686 | if (index >= 1) { | |
1687 | ret = -EINVAL; | |
1688 | goto bail; | |
1689 | } | |
1690 | gid->global.subnet_prefix = dev->gid_prefix; | |
34b2aafe | 1691 | gid->global.interface_id = dev->dd->ipath_guid; |
6522108f BS |
1692 | |
1693 | ret = 0; | |
1694 | ||
1695 | bail: | |
1696 | return ret; | |
1697 | } | |
1698 | ||
1699 | static struct ib_pd *ipath_alloc_pd(struct ib_device *ibdev, | |
1700 | struct ib_ucontext *context, | |
1701 | struct ib_udata *udata) | |
1702 | { | |
fe62546a | 1703 | struct ipath_ibdev *dev = to_idev(ibdev); |
6522108f BS |
1704 | struct ipath_pd *pd; |
1705 | struct ib_pd *ret; | |
1706 | ||
fe62546a BS |
1707 | /* |
1708 | * This is actually totally arbitrary. Some correctness tests | |
1709 | * assume there's a maximum number of PDs that can be allocated. | |
1710 | * We don't actually have this limit, but we fail the test if | |
1711 | * we allow allocations of more than we report for this value. | |
1712 | */ | |
1713 | ||
c27fef26 BS |
1714 | pd = kmalloc(sizeof *pd, GFP_KERNEL); |
1715 | if (!pd) { | |
fe62546a BS |
1716 | ret = ERR_PTR(-ENOMEM); |
1717 | goto bail; | |
1718 | } | |
1719 | ||
c27fef26 BS |
1720 | spin_lock(&dev->n_pds_lock); |
1721 | if (dev->n_pds_allocated == ib_ipath_max_pds) { | |
1722 | spin_unlock(&dev->n_pds_lock); | |
1723 | kfree(pd); | |
6522108f BS |
1724 | ret = ERR_PTR(-ENOMEM); |
1725 | goto bail; | |
1726 | } | |
1727 | ||
fe62546a | 1728 | dev->n_pds_allocated++; |
c27fef26 | 1729 | spin_unlock(&dev->n_pds_lock); |
fe62546a | 1730 | |
6522108f BS |
1731 | /* ib_alloc_pd() will initialize pd->ibpd. */ |
1732 | pd->user = udata != NULL; | |
1733 | ||
1734 | ret = &pd->ibpd; | |
1735 | ||
1736 | bail: | |
1737 | return ret; | |
1738 | } | |
1739 | ||
1740 | static int ipath_dealloc_pd(struct ib_pd *ibpd) | |
1741 | { | |
1742 | struct ipath_pd *pd = to_ipd(ibpd); | |
fe62546a BS |
1743 | struct ipath_ibdev *dev = to_idev(ibpd->device); |
1744 | ||
c27fef26 | 1745 | spin_lock(&dev->n_pds_lock); |
fe62546a | 1746 | dev->n_pds_allocated--; |
c27fef26 | 1747 | spin_unlock(&dev->n_pds_lock); |
6522108f BS |
1748 | |
1749 | kfree(pd); | |
1750 | ||
1751 | return 0; | |
1752 | } | |
1753 | ||
1754 | /** | |
1755 | * ipath_create_ah - create an address handle | |
1756 | * @pd: the protection domain | |
1757 | * @ah_attr: the attributes of the AH | |
1758 | * | |
1759 | * This may be called from interrupt context. | |
1760 | */ | |
1761 | static struct ib_ah *ipath_create_ah(struct ib_pd *pd, | |
1762 | struct ib_ah_attr *ah_attr) | |
1763 | { | |
1764 | struct ipath_ah *ah; | |
1765 | struct ib_ah *ret; | |
fe62546a | 1766 | struct ipath_ibdev *dev = to_idev(pd->device); |
3d27b004 | 1767 | unsigned long flags; |
fe62546a | 1768 | |
6522108f | 1769 | /* A multicast address requires a GRH (see ch. 8.4.1). */ |
27b678dd BS |
1770 | if (ah_attr->dlid >= IPATH_MULTICAST_LID_BASE && |
1771 | ah_attr->dlid != IPATH_PERMISSIVE_LID && | |
6522108f BS |
1772 | !(ah_attr->ah_flags & IB_AH_GRH)) { |
1773 | ret = ERR_PTR(-EINVAL); | |
1774 | goto bail; | |
1775 | } | |
1776 | ||
4a45b7d4 BS |
1777 | if (ah_attr->dlid == 0) { |
1778 | ret = ERR_PTR(-EINVAL); | |
1779 | goto bail; | |
1780 | } | |
1781 | ||
fe62546a | 1782 | if (ah_attr->port_num < 1 || |
4a45b7d4 BS |
1783 | ah_attr->port_num > pd->device->phys_port_cnt) { |
1784 | ret = ERR_PTR(-EINVAL); | |
1785 | goto bail; | |
1786 | } | |
1787 | ||
6522108f BS |
1788 | ah = kmalloc(sizeof *ah, GFP_ATOMIC); |
1789 | if (!ah) { | |
1790 | ret = ERR_PTR(-ENOMEM); | |
1791 | goto bail; | |
1792 | } | |
1793 | ||
3d27b004 | 1794 | spin_lock_irqsave(&dev->n_ahs_lock, flags); |
c27fef26 | 1795 | if (dev->n_ahs_allocated == ib_ipath_max_ahs) { |
3d27b004 | 1796 | spin_unlock_irqrestore(&dev->n_ahs_lock, flags); |
c27fef26 BS |
1797 | kfree(ah); |
1798 | ret = ERR_PTR(-ENOMEM); | |
1799 | goto bail; | |
1800 | } | |
1801 | ||
fe62546a | 1802 | dev->n_ahs_allocated++; |
3d27b004 | 1803 | spin_unlock_irqrestore(&dev->n_ahs_lock, flags); |
fe62546a | 1804 | |
6522108f BS |
1805 | /* ib_create_ah() will initialize ah->ibah. */ |
1806 | ah->attr = *ah_attr; | |
124b4dcb | 1807 | ah->attr.static_rate = ipath_ib_rate_to_mult(ah_attr->static_rate); |
6522108f BS |
1808 | |
1809 | ret = &ah->ibah; | |
1810 | ||
1811 | bail: | |
1812 | return ret; | |
1813 | } | |
1814 | ||
1815 | /** | |
1816 | * ipath_destroy_ah - destroy an address handle | |
1817 | * @ibah: the AH to destroy | |
1818 | * | |
1819 | * This may be called from interrupt context. | |
1820 | */ | |
1821 | static int ipath_destroy_ah(struct ib_ah *ibah) | |
1822 | { | |
fe62546a | 1823 | struct ipath_ibdev *dev = to_idev(ibah->device); |
6522108f | 1824 | struct ipath_ah *ah = to_iah(ibah); |
3d27b004 | 1825 | unsigned long flags; |
6522108f | 1826 | |
3d27b004 | 1827 | spin_lock_irqsave(&dev->n_ahs_lock, flags); |
fe62546a | 1828 | dev->n_ahs_allocated--; |
3d27b004 | 1829 | spin_unlock_irqrestore(&dev->n_ahs_lock, flags); |
fe62546a | 1830 | |
6522108f BS |
1831 | kfree(ah); |
1832 | ||
1833 | return 0; | |
1834 | } | |
1835 | ||
1836 | static int ipath_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr) | |
1837 | { | |
1838 | struct ipath_ah *ah = to_iah(ibah); | |
1839 | ||
1840 | *ah_attr = ah->attr; | |
124b4dcb | 1841 | ah_attr->static_rate = ipath_mult_to_ib_rate(ah->attr.static_rate); |
6522108f BS |
1842 | |
1843 | return 0; | |
1844 | } | |
1845 | ||
34b2aafe BS |
1846 | /** |
1847 | * ipath_get_npkeys - return the size of the PKEY table for port 0 | |
1848 | * @dd: the infinipath device | |
1849 | */ | |
1850 | unsigned ipath_get_npkeys(struct ipath_devdata *dd) | |
1851 | { | |
1852 | return ARRAY_SIZE(dd->ipath_pd[0]->port_pkeys); | |
1853 | } | |
1854 | ||
1855 | /** | |
3d089098 | 1856 | * ipath_get_pkey - return the indexed PKEY from the port PKEY table |
34b2aafe BS |
1857 | * @dd: the infinipath device |
1858 | * @index: the PKEY index | |
1859 | */ | |
1860 | unsigned ipath_get_pkey(struct ipath_devdata *dd, unsigned index) | |
1861 | { | |
1862 | unsigned ret; | |
1863 | ||
3d089098 | 1864 | /* always a kernel port, no locking needed */ |
34b2aafe BS |
1865 | if (index >= ARRAY_SIZE(dd->ipath_pd[0]->port_pkeys)) |
1866 | ret = 0; | |
1867 | else | |
1868 | ret = dd->ipath_pd[0]->port_pkeys[index]; | |
1869 | ||
1870 | return ret; | |
1871 | } | |
1872 | ||
6522108f BS |
1873 | static int ipath_query_pkey(struct ib_device *ibdev, u8 port, u16 index, |
1874 | u16 *pkey) | |
1875 | { | |
1876 | struct ipath_ibdev *dev = to_idev(ibdev); | |
1877 | int ret; | |
1878 | ||
34b2aafe | 1879 | if (index >= ipath_get_npkeys(dev->dd)) { |
6522108f BS |
1880 | ret = -EINVAL; |
1881 | goto bail; | |
1882 | } | |
1883 | ||
34b2aafe | 1884 | *pkey = ipath_get_pkey(dev->dd, index); |
6522108f BS |
1885 | ret = 0; |
1886 | ||
1887 | bail: | |
1888 | return ret; | |
1889 | } | |
1890 | ||
6522108f BS |
1891 | /** |
1892 | * ipath_alloc_ucontext - allocate a ucontest | |
1893 | * @ibdev: the infiniband device | |
1894 | * @udata: not used by the InfiniPath driver | |
1895 | */ | |
1896 | ||
1897 | static struct ib_ucontext *ipath_alloc_ucontext(struct ib_device *ibdev, | |
1898 | struct ib_udata *udata) | |
1899 | { | |
1900 | struct ipath_ucontext *context; | |
1901 | struct ib_ucontext *ret; | |
1902 | ||
1903 | context = kmalloc(sizeof *context, GFP_KERNEL); | |
1904 | if (!context) { | |
1905 | ret = ERR_PTR(-ENOMEM); | |
1906 | goto bail; | |
1907 | } | |
1908 | ||
1909 | ret = &context->ibucontext; | |
1910 | ||
1911 | bail: | |
1912 | return ret; | |
1913 | } | |
1914 | ||
1915 | static int ipath_dealloc_ucontext(struct ib_ucontext *context) | |
1916 | { | |
1917 | kfree(to_iucontext(context)); | |
1918 | return 0; | |
1919 | } | |
1920 | ||
1921 | static int ipath_verbs_register_sysfs(struct ib_device *dev); | |
1922 | ||
34b2aafe BS |
1923 | static void __verbs_timer(unsigned long arg) |
1924 | { | |
1925 | struct ipath_devdata *dd = (struct ipath_devdata *) arg; | |
1926 | ||
34b2aafe BS |
1927 | /* Handle verbs layer timeouts. */ |
1928 | ipath_ib_timer(dd->verbs_dev); | |
1929 | ||
1930 | mod_timer(&dd->verbs_timer, jiffies + 1); | |
1931 | } | |
1932 | ||
1933 | static int enable_timer(struct ipath_devdata *dd) | |
1934 | { | |
1935 | /* | |
1936 | * Early chips had a design flaw where the chip and kernel idea | |
1937 | * of the tail register don't always agree, and therefore we won't | |
1938 | * get an interrupt on the next packet received. | |
1939 | * If the board supports per packet receive interrupts, use it. | |
1940 | * Otherwise, the timer function periodically checks for packets | |
1941 | * to cover this case. | |
1942 | * Either way, the timer is needed for verbs layer related | |
1943 | * processing. | |
1944 | */ | |
1945 | if (dd->ipath_flags & IPATH_GPIO_INTR) { | |
1946 | ipath_write_kreg(dd, dd->ipath_kregs->kr_debugportselect, | |
1947 | 0x2074076542310ULL); | |
1948 | /* Enable GPIO bit 2 interrupt */ | |
8f140b40 AJ |
1949 | dd->ipath_gpio_mask |= (u64) (1 << IPATH_GPIO_PORT0_BIT); |
1950 | ipath_write_kreg(dd, dd->ipath_kregs->kr_gpio_mask, | |
1951 | dd->ipath_gpio_mask); | |
34b2aafe BS |
1952 | } |
1953 | ||
1954 | init_timer(&dd->verbs_timer); | |
1955 | dd->verbs_timer.function = __verbs_timer; | |
1956 | dd->verbs_timer.data = (unsigned long)dd; | |
1957 | dd->verbs_timer.expires = jiffies + 1; | |
1958 | add_timer(&dd->verbs_timer); | |
1959 | ||
1960 | return 0; | |
1961 | } | |
1962 | ||
1963 | static int disable_timer(struct ipath_devdata *dd) | |
1964 | { | |
1965 | /* Disable GPIO bit 2 interrupt */ | |
2c9446a1 | 1966 | if (dd->ipath_flags & IPATH_GPIO_INTR) { |
2c9446a1 | 1967 | /* Disable GPIO bit 2 interrupt */ |
8f140b40 AJ |
1968 | dd->ipath_gpio_mask &= ~((u64) (1 << IPATH_GPIO_PORT0_BIT)); |
1969 | ipath_write_kreg(dd, dd->ipath_kregs->kr_gpio_mask, | |
1970 | dd->ipath_gpio_mask); | |
2c9446a1 BS |
1971 | /* |
1972 | * We might want to undo changes to debugportselect, | |
1973 | * but how? | |
1974 | */ | |
1975 | } | |
34b2aafe BS |
1976 | |
1977 | del_timer_sync(&dd->verbs_timer); | |
1978 | ||
1979 | return 0; | |
1980 | } | |
1981 | ||
6522108f BS |
1982 | /** |
1983 | * ipath_register_ib_device - register our device with the infiniband core | |
6522108f BS |
1984 | * @dd: the device data structure |
1985 | * Return the allocated ipath_ibdev pointer or NULL on error. | |
1986 | */ | |
b1c1b6a3 | 1987 | int ipath_register_ib_device(struct ipath_devdata *dd) |
6522108f | 1988 | { |
34b2aafe | 1989 | struct ipath_verbs_counters cntrs; |
6522108f BS |
1990 | struct ipath_ibdev *idev; |
1991 | struct ib_device *dev; | |
124b4dcb DO |
1992 | struct ipath_verbs_txreq *tx; |
1993 | unsigned i; | |
6522108f BS |
1994 | int ret; |
1995 | ||
1996 | idev = (struct ipath_ibdev *)ib_alloc_device(sizeof *idev); | |
b1c1b6a3 BS |
1997 | if (idev == NULL) { |
1998 | ret = -ENOMEM; | |
6522108f | 1999 | goto bail; |
b1c1b6a3 | 2000 | } |
6522108f BS |
2001 | |
2002 | dev = &idev->ibdev; | |
2003 | ||
124b4dcb DO |
2004 | if (dd->ipath_sdma_descq_cnt) { |
2005 | tx = kmalloc(dd->ipath_sdma_descq_cnt * sizeof *tx, | |
2006 | GFP_KERNEL); | |
2007 | if (tx == NULL) { | |
2008 | ret = -ENOMEM; | |
2009 | goto err_tx; | |
2010 | } | |
2011 | } else | |
2012 | tx = NULL; | |
2013 | idev->txreq_bufs = tx; | |
2014 | ||
6522108f | 2015 | /* Only need to initialize non-zero fields. */ |
c27fef26 BS |
2016 | spin_lock_init(&idev->n_pds_lock); |
2017 | spin_lock_init(&idev->n_ahs_lock); | |
2018 | spin_lock_init(&idev->n_cqs_lock); | |
0b81e4f7 | 2019 | spin_lock_init(&idev->n_qps_lock); |
c27fef26 BS |
2020 | spin_lock_init(&idev->n_srqs_lock); |
2021 | spin_lock_init(&idev->n_mcast_grps_lock); | |
2022 | ||
6522108f BS |
2023 | spin_lock_init(&idev->qp_table.lock); |
2024 | spin_lock_init(&idev->lk_table.lock); | |
2025 | idev->sm_lid = __constant_be16_to_cpu(IB_LID_PERMISSIVE); | |
2026 | /* Set the prefix to the default value (see ch. 4.1.1) */ | |
2027 | idev->gid_prefix = __constant_cpu_to_be64(0xfe80000000000000ULL); | |
2028 | ||
2029 | ret = ipath_init_qp_table(idev, ib_ipath_qp_table_size); | |
2030 | if (ret) | |
2031 | goto err_qp; | |
2032 | ||
2033 | /* | |
2034 | * The top ib_ipath_lkey_table_size bits are used to index the | |
2035 | * table. The lower 8 bits can be owned by the user (copied from | |
2036 | * the LKEY). The remaining bits act as a generation number or tag. | |
2037 | */ | |
2038 | idev->lk_table.max = 1 << ib_ipath_lkey_table_size; | |
2039 | idev->lk_table.table = kzalloc(idev->lk_table.max * | |
2040 | sizeof(*idev->lk_table.table), | |
2041 | GFP_KERNEL); | |
2042 | if (idev->lk_table.table == NULL) { | |
2043 | ret = -ENOMEM; | |
2044 | goto err_lk; | |
2045 | } | |
6b66b2da | 2046 | INIT_LIST_HEAD(&idev->pending_mmaps); |
6522108f | 2047 | spin_lock_init(&idev->pending_lock); |
6b66b2da RW |
2048 | idev->mmap_offset = PAGE_SIZE; |
2049 | spin_lock_init(&idev->mmap_offset_lock); | |
6522108f BS |
2050 | INIT_LIST_HEAD(&idev->pending[0]); |
2051 | INIT_LIST_HEAD(&idev->pending[1]); | |
2052 | INIT_LIST_HEAD(&idev->pending[2]); | |
2053 | INIT_LIST_HEAD(&idev->piowait); | |
2054 | INIT_LIST_HEAD(&idev->rnrwait); | |
124b4dcb | 2055 | INIT_LIST_HEAD(&idev->txreq_free); |
6522108f BS |
2056 | idev->pending_index = 0; |
2057 | idev->port_cap_flags = | |
2058 | IB_PORT_SYS_IMAGE_GUID_SUP | IB_PORT_CLIENT_REG_SUP; | |
a51a2513 RC |
2059 | if (dd->ipath_flags & IPATH_HAS_LINK_LATENCY) |
2060 | idev->port_cap_flags |= IB_PORT_LINK_LATENCY_SUP; | |
6522108f BS |
2061 | idev->pma_counter_select[0] = IB_PMA_PORT_XMIT_DATA; |
2062 | idev->pma_counter_select[1] = IB_PMA_PORT_RCV_DATA; | |
2063 | idev->pma_counter_select[2] = IB_PMA_PORT_XMIT_PKTS; | |
2064 | idev->pma_counter_select[3] = IB_PMA_PORT_RCV_PKTS; | |
53533e16 | 2065 | idev->pma_counter_select[4] = IB_PMA_PORT_XMIT_WAIT; |
6522108f | 2066 | |
fba75200 | 2067 | /* Snapshot current HW counters to "clear" them. */ |
34b2aafe | 2068 | ipath_get_counters(dd, &cntrs); |
fba75200 BS |
2069 | idev->z_symbol_error_counter = cntrs.symbol_error_counter; |
2070 | idev->z_link_error_recovery_counter = | |
2071 | cntrs.link_error_recovery_counter; | |
2072 | idev->z_link_downed_counter = cntrs.link_downed_counter; | |
2073 | idev->z_port_rcv_errors = cntrs.port_rcv_errors; | |
2074 | idev->z_port_rcv_remphys_errors = | |
2075 | cntrs.port_rcv_remphys_errors; | |
2076 | idev->z_port_xmit_discards = cntrs.port_xmit_discards; | |
2077 | idev->z_port_xmit_data = cntrs.port_xmit_data; | |
2078 | idev->z_port_rcv_data = cntrs.port_rcv_data; | |
2079 | idev->z_port_xmit_packets = cntrs.port_xmit_packets; | |
2080 | idev->z_port_rcv_packets = cntrs.port_rcv_packets; | |
2081 | idev->z_local_link_integrity_errors = | |
2082 | cntrs.local_link_integrity_errors; | |
2083 | idev->z_excessive_buffer_overrun_errors = | |
2084 | cntrs.excessive_buffer_overrun_errors; | |
6c719cae | 2085 | idev->z_vl15_dropped = cntrs.vl15_dropped; |
fba75200 | 2086 | |
124b4dcb DO |
2087 | for (i = 0; i < dd->ipath_sdma_descq_cnt; i++, tx++) |
2088 | list_add(&tx->txreq.list, &idev->txreq_free); | |
2089 | ||
6522108f BS |
2090 | /* |
2091 | * The system image GUID is supposed to be the same for all | |
2092 | * IB HCAs in a single system but since there can be other | |
2093 | * device types in the system, we can't be sure this is unique. | |
2094 | */ | |
2095 | if (!sys_image_guid) | |
34b2aafe | 2096 | sys_image_guid = dd->ipath_guid; |
6522108f | 2097 | idev->sys_image_guid = sys_image_guid; |
b1c1b6a3 | 2098 | idev->ib_unit = dd->ipath_unit; |
6522108f BS |
2099 | idev->dd = dd; |
2100 | ||
2101 | strlcpy(dev->name, "ipath%d", IB_DEVICE_NAME_MAX); | |
41c75a19 | 2102 | dev->owner = THIS_MODULE; |
34b2aafe | 2103 | dev->node_guid = dd->ipath_guid; |
6522108f BS |
2104 | dev->uverbs_abi_ver = IPATH_UVERBS_ABI_VERSION; |
2105 | dev->uverbs_cmd_mask = | |
2106 | (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) | | |
2107 | (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) | | |
2108 | (1ull << IB_USER_VERBS_CMD_QUERY_PORT) | | |
2109 | (1ull << IB_USER_VERBS_CMD_ALLOC_PD) | | |
2110 | (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) | | |
2111 | (1ull << IB_USER_VERBS_CMD_CREATE_AH) | | |
2112 | (1ull << IB_USER_VERBS_CMD_DESTROY_AH) | | |
2113 | (1ull << IB_USER_VERBS_CMD_QUERY_AH) | | |
2114 | (1ull << IB_USER_VERBS_CMD_REG_MR) | | |
2115 | (1ull << IB_USER_VERBS_CMD_DEREG_MR) | | |
2116 | (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) | | |
2117 | (1ull << IB_USER_VERBS_CMD_CREATE_CQ) | | |
2118 | (1ull << IB_USER_VERBS_CMD_RESIZE_CQ) | | |
2119 | (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) | | |
2120 | (1ull << IB_USER_VERBS_CMD_POLL_CQ) | | |
2121 | (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) | | |
2122 | (1ull << IB_USER_VERBS_CMD_CREATE_QP) | | |
2123 | (1ull << IB_USER_VERBS_CMD_QUERY_QP) | | |
2124 | (1ull << IB_USER_VERBS_CMD_MODIFY_QP) | | |
2125 | (1ull << IB_USER_VERBS_CMD_DESTROY_QP) | | |
2126 | (1ull << IB_USER_VERBS_CMD_POST_SEND) | | |
2127 | (1ull << IB_USER_VERBS_CMD_POST_RECV) | | |
2128 | (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) | | |
2129 | (1ull << IB_USER_VERBS_CMD_DETACH_MCAST) | | |
2130 | (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) | | |
2131 | (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) | | |
2132 | (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) | | |
2133 | (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ) | | |
2134 | (1ull << IB_USER_VERBS_CMD_POST_SRQ_RECV); | |
07ebafba | 2135 | dev->node_type = RDMA_NODE_IB_CA; |
6522108f | 2136 | dev->phys_port_cnt = 1; |
f4fd0b22 | 2137 | dev->num_comp_vectors = 1; |
34b2aafe | 2138 | dev->dma_device = &dd->pcidev->dev; |
6522108f BS |
2139 | dev->query_device = ipath_query_device; |
2140 | dev->modify_device = ipath_modify_device; | |
2141 | dev->query_port = ipath_query_port; | |
2142 | dev->modify_port = ipath_modify_port; | |
2143 | dev->query_pkey = ipath_query_pkey; | |
2144 | dev->query_gid = ipath_query_gid; | |
2145 | dev->alloc_ucontext = ipath_alloc_ucontext; | |
2146 | dev->dealloc_ucontext = ipath_dealloc_ucontext; | |
2147 | dev->alloc_pd = ipath_alloc_pd; | |
2148 | dev->dealloc_pd = ipath_dealloc_pd; | |
2149 | dev->create_ah = ipath_create_ah; | |
2150 | dev->destroy_ah = ipath_destroy_ah; | |
2151 | dev->query_ah = ipath_query_ah; | |
2152 | dev->create_srq = ipath_create_srq; | |
2153 | dev->modify_srq = ipath_modify_srq; | |
2154 | dev->query_srq = ipath_query_srq; | |
2155 | dev->destroy_srq = ipath_destroy_srq; | |
2156 | dev->create_qp = ipath_create_qp; | |
2157 | dev->modify_qp = ipath_modify_qp; | |
2158 | dev->query_qp = ipath_query_qp; | |
2159 | dev->destroy_qp = ipath_destroy_qp; | |
2160 | dev->post_send = ipath_post_send; | |
2161 | dev->post_recv = ipath_post_receive; | |
2162 | dev->post_srq_recv = ipath_post_srq_receive; | |
2163 | dev->create_cq = ipath_create_cq; | |
2164 | dev->destroy_cq = ipath_destroy_cq; | |
2165 | dev->resize_cq = ipath_resize_cq; | |
2166 | dev->poll_cq = ipath_poll_cq; | |
2167 | dev->req_notify_cq = ipath_req_notify_cq; | |
2168 | dev->get_dma_mr = ipath_get_dma_mr; | |
2169 | dev->reg_phys_mr = ipath_reg_phys_mr; | |
2170 | dev->reg_user_mr = ipath_reg_user_mr; | |
2171 | dev->dereg_mr = ipath_dereg_mr; | |
2172 | dev->alloc_fmr = ipath_alloc_fmr; | |
2173 | dev->map_phys_fmr = ipath_map_phys_fmr; | |
2174 | dev->unmap_fmr = ipath_unmap_fmr; | |
2175 | dev->dealloc_fmr = ipath_dealloc_fmr; | |
2176 | dev->attach_mcast = ipath_multicast_attach; | |
2177 | dev->detach_mcast = ipath_multicast_detach; | |
2178 | dev->process_mad = ipath_process_mad; | |
373d9915 | 2179 | dev->mmap = ipath_mmap; |
f2cbb660 | 2180 | dev->dma_ops = &ipath_dma_mapping_ops; |
6522108f BS |
2181 | |
2182 | snprintf(dev->node_desc, sizeof(dev->node_desc), | |
96b644bd | 2183 | IPATH_IDSTR " %s", init_utsname()->nodename); |
6522108f | 2184 | |
9a6edb60 | 2185 | ret = ib_register_device(dev, NULL); |
6522108f BS |
2186 | if (ret) |
2187 | goto err_reg; | |
2188 | ||
2189 | if (ipath_verbs_register_sysfs(dev)) | |
2190 | goto err_class; | |
2191 | ||
34b2aafe | 2192 | enable_timer(dd); |
6522108f BS |
2193 | |
2194 | goto bail; | |
2195 | ||
2196 | err_class: | |
2197 | ib_unregister_device(dev); | |
2198 | err_reg: | |
2199 | kfree(idev->lk_table.table); | |
2200 | err_lk: | |
2201 | kfree(idev->qp_table.table); | |
2202 | err_qp: | |
124b4dcb DO |
2203 | kfree(idev->txreq_bufs); |
2204 | err_tx: | |
6522108f | 2205 | ib_dealloc_device(dev); |
b55f4f06 | 2206 | ipath_dev_err(dd, "cannot register verbs: %d!\n", -ret); |
6522108f BS |
2207 | idev = NULL; |
2208 | ||
2209 | bail: | |
b1c1b6a3 BS |
2210 | dd->verbs_dev = idev; |
2211 | return ret; | |
6522108f BS |
2212 | } |
2213 | ||
b1c1b6a3 | 2214 | void ipath_unregister_ib_device(struct ipath_ibdev *dev) |
6522108f | 2215 | { |
6522108f | 2216 | struct ib_device *ibdev = &dev->ibdev; |
e509be89 | 2217 | u32 qps_inuse; |
6522108f BS |
2218 | |
2219 | ib_unregister_device(ibdev); | |
2220 | ||
e509be89 RC |
2221 | disable_timer(dev->dd); |
2222 | ||
6522108f BS |
2223 | if (!list_empty(&dev->pending[0]) || |
2224 | !list_empty(&dev->pending[1]) || | |
2225 | !list_empty(&dev->pending[2])) | |
b55f4f06 | 2226 | ipath_dev_err(dev->dd, "pending list not empty!\n"); |
6522108f | 2227 | if (!list_empty(&dev->piowait)) |
b55f4f06 | 2228 | ipath_dev_err(dev->dd, "piowait list not empty!\n"); |
6522108f | 2229 | if (!list_empty(&dev->rnrwait)) |
b55f4f06 | 2230 | ipath_dev_err(dev->dd, "rnrwait list not empty!\n"); |
6522108f | 2231 | if (!ipath_mcast_tree_empty()) |
b55f4f06 | 2232 | ipath_dev_err(dev->dd, "multicast table memory leak!\n"); |
6522108f BS |
2233 | /* |
2234 | * Note that ipath_unregister_ib_device() can be called before all | |
2235 | * the QPs are destroyed! | |
2236 | */ | |
e509be89 RC |
2237 | qps_inuse = ipath_free_all_qps(&dev->qp_table); |
2238 | if (qps_inuse) | |
2239 | ipath_dev_err(dev->dd, "QP memory leak! %u still in use\n", | |
2240 | qps_inuse); | |
6522108f BS |
2241 | kfree(dev->qp_table.table); |
2242 | kfree(dev->lk_table.table); | |
124b4dcb | 2243 | kfree(dev->txreq_bufs); |
6522108f BS |
2244 | ib_dealloc_device(ibdev); |
2245 | } | |
2246 | ||
f4e91eb4 TJ |
2247 | static ssize_t show_rev(struct device *device, struct device_attribute *attr, |
2248 | char *buf) | |
6522108f | 2249 | { |
5494c22b | 2250 | struct ipath_ibdev *dev = |
f4e91eb4 | 2251 | container_of(device, struct ipath_ibdev, ibdev.dev); |
6522108f | 2252 | |
34b2aafe | 2253 | return sprintf(buf, "%x\n", dev->dd->ipath_pcirev); |
6522108f BS |
2254 | } |
2255 | ||
f4e91eb4 TJ |
2256 | static ssize_t show_hca(struct device *device, struct device_attribute *attr, |
2257 | char *buf) | |
6522108f | 2258 | { |
5494c22b | 2259 | struct ipath_ibdev *dev = |
f4e91eb4 | 2260 | container_of(device, struct ipath_ibdev, ibdev.dev); |
5494c22b | 2261 | int ret; |
6522108f | 2262 | |
34b2aafe | 2263 | ret = dev->dd->ipath_f_get_boardname(dev->dd, buf, 128); |
5494c22b RD |
2264 | if (ret < 0) |
2265 | goto bail; | |
2266 | strcat(buf, "\n"); | |
2267 | ret = strlen(buf); | |
6522108f BS |
2268 | |
2269 | bail: | |
2270 | return ret; | |
2271 | } | |
2272 | ||
f4e91eb4 TJ |
2273 | static ssize_t show_stats(struct device *device, struct device_attribute *attr, |
2274 | char *buf) | |
6522108f | 2275 | { |
5494c22b | 2276 | struct ipath_ibdev *dev = |
f4e91eb4 | 2277 | container_of(device, struct ipath_ibdev, ibdev.dev); |
5494c22b RD |
2278 | int i; |
2279 | int len; | |
2280 | ||
2281 | len = sprintf(buf, | |
2282 | "RC resends %d\n" | |
9b2017f1 | 2283 | "RC no QACK %d\n" |
5494c22b RD |
2284 | "RC ACKs %d\n" |
2285 | "RC SEQ NAKs %d\n" | |
2286 | "RC RDMA seq %d\n" | |
2287 | "RC RNR NAKs %d\n" | |
2288 | "RC OTH NAKs %d\n" | |
2289 | "RC timeouts %d\n" | |
2290 | "RC RDMA dup %d\n" | |
2291 | "piobuf wait %d\n" | |
124b4dcb | 2292 | "unaligned %d\n" |
5494c22b RD |
2293 | "PKT drops %d\n" |
2294 | "WQE errs %d\n", | |
2295 | dev->n_rc_resends, dev->n_rc_qacks, dev->n_rc_acks, | |
2296 | dev->n_seq_naks, dev->n_rdma_seq, dev->n_rnr_naks, | |
2297 | dev->n_other_naks, dev->n_timeouts, | |
e509be89 | 2298 | dev->n_rdma_dup_busy, dev->n_piowait, dev->n_unaligned, |
124b4dcb | 2299 | dev->n_pkt_drops, dev->n_wqe_errs); |
5494c22b | 2300 | for (i = 0; i < ARRAY_SIZE(dev->opstats); i++) { |
6522108f BS |
2301 | const struct ipath_opcode_stats *si = &dev->opstats[i]; |
2302 | ||
5494c22b RD |
2303 | if (!si->n_packets && !si->n_bytes) |
2304 | continue; | |
2305 | len += sprintf(buf + len, "%02x %llu/%llu\n", i, | |
6522108f | 2306 | (unsigned long long) si->n_packets, |
5494c22b RD |
2307 | (unsigned long long) si->n_bytes); |
2308 | } | |
2309 | return len; | |
6522108f BS |
2310 | } |
2311 | ||
f4e91eb4 TJ |
2312 | static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL); |
2313 | static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL); | |
2314 | static DEVICE_ATTR(board_id, S_IRUGO, show_hca, NULL); | |
2315 | static DEVICE_ATTR(stats, S_IRUGO, show_stats, NULL); | |
6522108f | 2316 | |
f4e91eb4 TJ |
2317 | static struct device_attribute *ipath_class_attributes[] = { |
2318 | &dev_attr_hw_rev, | |
2319 | &dev_attr_hca_type, | |
2320 | &dev_attr_board_id, | |
2321 | &dev_attr_stats | |
6522108f BS |
2322 | }; |
2323 | ||
2324 | static int ipath_verbs_register_sysfs(struct ib_device *dev) | |
2325 | { | |
5494c22b | 2326 | int i; |
6522108f BS |
2327 | int ret; |
2328 | ||
5494c22b | 2329 | for (i = 0; i < ARRAY_SIZE(ipath_class_attributes); ++i) |
f4e91eb4 TJ |
2330 | if (device_create_file(&dev->dev, |
2331 | ipath_class_attributes[i])) { | |
5494c22b | 2332 | ret = 1; |
6522108f BS |
2333 | goto bail; |
2334 | } | |
2335 | ||
5494c22b | 2336 | ret = 0; |
6522108f BS |
2337 | |
2338 | bail: | |
2339 | return ret; | |
2340 | } |