?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Committer: Michael Beasley <mike@snafu.setup>
[mikesnafu-overlay.git] / drivers / infiniband / hw / ehca / ehca_main.c
bloba86ebcc79a95a7db5343cdcd4f37fb6a9a1e8d07
1 /*
2 * IBM eServer eHCA Infiniband device driver for Linux on POWER
3 *
4 * module start stop, hca detection
5 *
6 * Authors: Heiko J Schick <schickhj@de.ibm.com>
7 * Hoang-Nam Nguyen <hnguyen@de.ibm.com>
8 * Joachim Fenkes <fenkes@de.ibm.com>
9 *
10 * Copyright (c) 2005 IBM Corporation
11 *
12 * All rights reserved.
13 *
14 * This source code is distributed under a dual license of GPL v2.0 and OpenIB
15 * BSD.
16 *
17 * OpenIB BSD License
18 *
19 * Redistribution and use in source and binary forms, with or without
20 * modification, are permitted provided that the following conditions are met:
21 *
22 * Redistributions of source code must retain the above copyright notice, this
23 * list of conditions and the following disclaimer.
24 *
25 * Redistributions in binary form must reproduce the above copyright notice,
26 * this list of conditions and the following disclaimer in the documentation
27 * and/or other materials
28 * provided with the distribution.
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
31 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
34 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
35 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
36 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
37 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
38 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
39 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
40 * POSSIBILITY OF SUCH DAMAGE.
41 */
42
43 #ifdef CONFIG_PPC_64K_PAGES
44 #include <linux/slab.h>
45 #endif
46
47 #include "ehca_classes.h"
48 #include "ehca_iverbs.h"
49 #include "ehca_mrmw.h"
50 #include "ehca_tools.h"
51 #include "hcp_if.h"
52
53 #define HCAD_VERSION "0025"
54
55 MODULE_LICENSE("Dual BSD/GPL");
56 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
57 MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver");
58 MODULE_VERSION(HCAD_VERSION);
59
60 int ehca_open_aqp1 = 0;
61 int ehca_debug_level = 0;
62 int ehca_hw_level = 0;
63 int ehca_nr_ports = 2;
64 int ehca_use_hp_mr = 0;
65 int ehca_port_act_time = 30;
66 int ehca_poll_all_eqs = 1;
67 int ehca_static_rate = -1;
68 int ehca_scaling_code = 0;
69 int ehca_mr_largepage = 1;
70 int ehca_lock_hcalls = -1;
71
72 module_param_named(open_aqp1, ehca_open_aqp1, int, S_IRUGO);
73 module_param_named(debug_level, ehca_debug_level, int, S_IRUGO);
74 module_param_named(hw_level, ehca_hw_level, int, S_IRUGO);
75 module_param_named(nr_ports, ehca_nr_ports, int, S_IRUGO);
76 module_param_named(use_hp_mr, ehca_use_hp_mr, int, S_IRUGO);
77 module_param_named(port_act_time, ehca_port_act_time, int, S_IRUGO);
78 module_param_named(poll_all_eqs, ehca_poll_all_eqs, int, S_IRUGO);
79 module_param_named(static_rate, ehca_static_rate, int, S_IRUGO);
80 module_param_named(scaling_code, ehca_scaling_code, int, S_IRUGO);
81 module_param_named(mr_largepage, ehca_mr_largepage, int, S_IRUGO);
82 module_param_named(lock_hcalls, ehca_lock_hcalls, bool, S_IRUGO);
83
84 MODULE_PARM_DESC(open_aqp1,
85 "AQP1 on startup (0: no (default), 1: yes)");
86 MODULE_PARM_DESC(debug_level,
87 "debug level"
88 " (0: no debug traces (default), 1: with debug traces)");
89 MODULE_PARM_DESC(hw_level,
90 "hardware level"
91 " (0: autosensing (default), 1: v. 0.20, 2: v. 0.21)");
92 MODULE_PARM_DESC(nr_ports,
93 "number of connected ports (-1: autodetect, 1: port one only, "
94 "2: two ports (default)");
95 MODULE_PARM_DESC(use_hp_mr,
96 "high performance MRs (0: no (default), 1: yes)");
97 MODULE_PARM_DESC(port_act_time,
98 "time to wait for port activation (default: 30 sec)");
99 MODULE_PARM_DESC(poll_all_eqs,
100 "polls all event queues periodically"
101 " (0: no, 1: yes (default))");
102 MODULE_PARM_DESC(static_rate,
103 "set permanent static rate (default: disabled)");
104 MODULE_PARM_DESC(scaling_code,
105 "set scaling code (0: disabled/default, 1: enabled)");
106 MODULE_PARM_DESC(mr_largepage,
107 "use large page for MR (0: use PAGE_SIZE (default), "
108 "1: use large page depending on MR size");
109 MODULE_PARM_DESC(lock_hcalls,
110 "serialize all hCalls made by the driver "
111 "(default: autodetect)");
112
113 DEFINE_RWLOCK(ehca_qp_idr_lock);
114 DEFINE_RWLOCK(ehca_cq_idr_lock);
115 DEFINE_IDR(ehca_qp_idr);
116 DEFINE_IDR(ehca_cq_idr);
117
118 static LIST_HEAD(shca_list); /* list of all registered ehcas */
119 static DEFINE_SPINLOCK(shca_list_lock);
120
121 static struct timer_list poll_eqs_timer;
122
123 #ifdef CONFIG_PPC_64K_PAGES
124 static struct kmem_cache *ctblk_cache;
125
126 void *ehca_alloc_fw_ctrlblock(gfp_t flags)
127 {
128 void *ret = kmem_cache_zalloc(ctblk_cache, flags);
129 if (!ret)
130 ehca_gen_err("Out of memory for ctblk");
131 return ret;
132 }
133
134 void ehca_free_fw_ctrlblock(void *ptr)
135 {
136 if (ptr)
137 kmem_cache_free(ctblk_cache, ptr);
138
139 }
140 #endif
141
142 int ehca2ib_return_code(u64 ehca_rc)
143 {
144 switch (ehca_rc) {
145 case H_SUCCESS:
146 return 0;
147 case H_RESOURCE: /* Resource in use */
148 case H_BUSY:
149 return -EBUSY;
150 case H_NOT_ENOUGH_RESOURCES: /* insufficient resources */
151 case H_CONSTRAINED: /* resource constraint */
152 case H_NO_MEM:
153 return -ENOMEM;
154 default:
155 return -EINVAL;
156 }
157 }
158
159 static int ehca_create_slab_caches(void)
160 {
161 int ret;
162
163 ret = ehca_init_pd_cache();
164 if (ret) {
165 ehca_gen_err("Cannot create PD SLAB cache.");
166 return ret;
167 }
168
169 ret = ehca_init_cq_cache();
170 if (ret) {
171 ehca_gen_err("Cannot create CQ SLAB cache.");
172 goto create_slab_caches2;
173 }
174
175 ret = ehca_init_qp_cache();
176 if (ret) {
177 ehca_gen_err("Cannot create QP SLAB cache.");
178 goto create_slab_caches3;
179 }
180
181 ret = ehca_init_av_cache();
182 if (ret) {
183 ehca_gen_err("Cannot create AV SLAB cache.");
184 goto create_slab_caches4;
185 }
186
187 ret = ehca_init_mrmw_cache();
188 if (ret) {
189 ehca_gen_err("Cannot create MR&MW SLAB cache.");
190 goto create_slab_caches5;
191 }
192
193 ret = ehca_init_small_qp_cache();
194 if (ret) {
195 ehca_gen_err("Cannot create small queue SLAB cache.");
196 goto create_slab_caches6;
197 }
198
199 #ifdef CONFIG_PPC_64K_PAGES
200 ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
201 EHCA_PAGESIZE, H_CB_ALIGNMENT,
202 SLAB_HWCACHE_ALIGN,
203 NULL);
204 if (!ctblk_cache) {
205 ehca_gen_err("Cannot create ctblk SLAB cache.");
206 ehca_cleanup_small_qp_cache();
207 goto create_slab_caches6;
208 }
209 #endif
210 return 0;
211
212 create_slab_caches6:
213 ehca_cleanup_mrmw_cache();
214
215 create_slab_caches5:
216 ehca_cleanup_av_cache();
217
218 create_slab_caches4:
219 ehca_cleanup_qp_cache();
220
221 create_slab_caches3:
222 ehca_cleanup_cq_cache();
223
224 create_slab_caches2:
225 ehca_cleanup_pd_cache();
226
227 return ret;
228 }
229
230 static void ehca_destroy_slab_caches(void)
231 {
232 ehca_cleanup_small_qp_cache();
233 ehca_cleanup_mrmw_cache();
234 ehca_cleanup_av_cache();
235 ehca_cleanup_qp_cache();
236 ehca_cleanup_cq_cache();
237 ehca_cleanup_pd_cache();
238 #ifdef CONFIG_PPC_64K_PAGES
239 if (ctblk_cache)
240 kmem_cache_destroy(ctblk_cache);
241 #endif
242 }
243
244 #define EHCA_HCAAVER EHCA_BMASK_IBM(32, 39)
245 #define EHCA_REVID EHCA_BMASK_IBM(40, 63)
246
247 static struct cap_descr {
248 u64 mask;
249 char *descr;
250 } hca_cap_descr[] = {
251 { HCA_CAP_AH_PORT_NR_CHECK, "HCA_CAP_AH_PORT_NR_CHECK" },
252 { HCA_CAP_ATOMIC, "HCA_CAP_ATOMIC" },
253 { HCA_CAP_AUTO_PATH_MIG, "HCA_CAP_AUTO_PATH_MIG" },
254 { HCA_CAP_BAD_P_KEY_CTR, "HCA_CAP_BAD_P_KEY_CTR" },
255 { HCA_CAP_SQD_RTS_PORT_CHANGE, "HCA_CAP_SQD_RTS_PORT_CHANGE" },
256 { HCA_CAP_CUR_QP_STATE_MOD, "HCA_CAP_CUR_QP_STATE_MOD" },
257 { HCA_CAP_INIT_TYPE, "HCA_CAP_INIT_TYPE" },
258 { HCA_CAP_PORT_ACTIVE_EVENT, "HCA_CAP_PORT_ACTIVE_EVENT" },
259 { HCA_CAP_Q_KEY_VIOL_CTR, "HCA_CAP_Q_KEY_VIOL_CTR" },
260 { HCA_CAP_WQE_RESIZE, "HCA_CAP_WQE_RESIZE" },
261 { HCA_CAP_RAW_PACKET_MCAST, "HCA_CAP_RAW_PACKET_MCAST" },
262 { HCA_CAP_SHUTDOWN_PORT, "HCA_CAP_SHUTDOWN_PORT" },
263 { HCA_CAP_RC_LL_QP, "HCA_CAP_RC_LL_QP" },
264 { HCA_CAP_SRQ, "HCA_CAP_SRQ" },
265 { HCA_CAP_UD_LL_QP, "HCA_CAP_UD_LL_QP" },
266 { HCA_CAP_RESIZE_MR, "HCA_CAP_RESIZE_MR" },
267 { HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" },
268 { HCA_CAP_H_ALLOC_RES_SYNC, "HCA_CAP_H_ALLOC_RES_SYNC" },
269 };
270
271 static int ehca_sense_attributes(struct ehca_shca *shca)
272 {
273 int i, ret = 0;
274 u64 h_ret;
275 struct hipz_query_hca *rblock;
276 struct hipz_query_port *port;
277
278 static const u32 pgsize_map[] = {
279 HCA_CAP_MR_PGSIZE_4K, 0x1000,
280 HCA_CAP_MR_PGSIZE_64K, 0x10000,
281 HCA_CAP_MR_PGSIZE_1M, 0x100000,
282 HCA_CAP_MR_PGSIZE_16M, 0x1000000,
283 };
284
285 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
286 if (!rblock) {
287 ehca_gen_err("Cannot allocate rblock memory.");
288 return -ENOMEM;
289 }
290
291 h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
292 if (h_ret != H_SUCCESS) {
293 ehca_gen_err("Cannot query device properties. h_ret=%li",
294 h_ret);
295 ret = -EPERM;
296 goto sense_attributes1;
297 }
298
299 if (ehca_nr_ports == 1)
300 shca->num_ports = 1;
301 else
302 shca->num_ports = (u8)rblock->num_ports;
303
304 ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
305
306 if (ehca_hw_level == 0) {
307 u32 hcaaver;
308 u32 revid;
309
310 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
311 revid = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
312
313 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
314
315 if (hcaaver == 1) {
316 if (revid <= 3)
317 shca->hw_level = 0x10 | (revid + 1);
318 else
319 shca->hw_level = 0x14;
320 } else if (hcaaver == 2) {
321 if (revid == 0)
322 shca->hw_level = 0x21;
323 else if (revid == 0x10)
324 shca->hw_level = 0x22;
325 else if (revid == 0x20 || revid == 0x21)
326 shca->hw_level = 0x23;
327 }
328
329 if (!shca->hw_level) {
330 ehca_gen_warn("unknown hardware version"
331 " - assuming default level");
332 shca->hw_level = 0x22;
333 }
334 } else
335 shca->hw_level = ehca_hw_level;
336 ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
337
338 shca->hca_cap = rblock->hca_cap_indicators;
339 ehca_gen_dbg(" ... HCA capabilities:");
340 for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
341 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
342 ehca_gen_dbg(" %s", hca_cap_descr[i].descr);
343
344 /* Autodetect hCall locking -- the "H_ALLOC_RESOURCE synced" flag is
345 * a firmware property, so it's valid across all adapters
346 */
347 if (ehca_lock_hcalls == -1)
348 ehca_lock_hcalls = !(shca->hca_cap & HCA_CAP_H_ALLOC_RES_SYNC);
349
350 /* translate supported MR page sizes; always support 4K */
351 shca->hca_cap_mr_pgsize = EHCA_PAGESIZE;
352 if (ehca_mr_largepage) { /* support extra sizes only if enabled */
353 for (i = 0; i < ARRAY_SIZE(pgsize_map); i += 2)
354 if (rblock->memory_page_size_supported & pgsize_map[i])
355 shca->hca_cap_mr_pgsize |= pgsize_map[i + 1];
356 }
357
358 /* query max MTU from first port -- it's the same for all ports */
359 port = (struct hipz_query_port *)rblock;
360 h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
361 if (h_ret != H_SUCCESS) {
362 ehca_gen_err("Cannot query port properties. h_ret=%li",
363 h_ret);
364 ret = -EPERM;
365 goto sense_attributes1;
366 }
367
368 shca->max_mtu = port->max_mtu;
369
370 sense_attributes1:
371 ehca_free_fw_ctrlblock(rblock);
372 return ret;
373 }
374
375 static int init_node_guid(struct ehca_shca *shca)
376 {
377 int ret = 0;
378 struct hipz_query_hca *rblock;
379
380 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
381 if (!rblock) {
382 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
383 return -ENOMEM;
384 }
385
386 if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
387 ehca_err(&shca->ib_device, "Can't query device properties");
388 ret = -EINVAL;
389 goto init_node_guid1;
390 }
391
392 memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
393
394 init_node_guid1:
395 ehca_free_fw_ctrlblock(rblock);
396 return ret;
397 }
398
399 int ehca_init_device(struct ehca_shca *shca)
400 {
401 int ret;
402
403 ret = init_node_guid(shca);
404 if (ret)
405 return ret;
406
407 strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
408 shca->ib_device.owner = THIS_MODULE;
409
410 shca->ib_device.uverbs_abi_ver = 8;
411 shca->ib_device.uverbs_cmd_mask =
412 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
413 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
414 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
415 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
416 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
417 (1ull << IB_USER_VERBS_CMD_REG_MR) |
418 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
419 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
420 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
421 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
422 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
423 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
424 (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
425 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
426 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) |
427 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
428
429 shca->ib_device.node_type = RDMA_NODE_IB_CA;
430 shca->ib_device.phys_port_cnt = shca->num_ports;
431 shca->ib_device.num_comp_vectors = 1;
432 shca->ib_device.dma_device = &shca->ofdev->dev;
433 shca->ib_device.query_device = ehca_query_device;
434 shca->ib_device.query_port = ehca_query_port;
435 shca->ib_device.query_gid = ehca_query_gid;
436 shca->ib_device.query_pkey = ehca_query_pkey;
437 /* shca->in_device.modify_device = ehca_modify_device */
438 shca->ib_device.modify_port = ehca_modify_port;
439 shca->ib_device.alloc_ucontext = ehca_alloc_ucontext;
440 shca->ib_device.dealloc_ucontext = ehca_dealloc_ucontext;
441 shca->ib_device.alloc_pd = ehca_alloc_pd;
442 shca->ib_device.dealloc_pd = ehca_dealloc_pd;
443 shca->ib_device.create_ah = ehca_create_ah;
444 /* shca->ib_device.modify_ah = ehca_modify_ah; */
445 shca->ib_device.query_ah = ehca_query_ah;
446 shca->ib_device.destroy_ah = ehca_destroy_ah;
447 shca->ib_device.create_qp = ehca_create_qp;
448 shca->ib_device.modify_qp = ehca_modify_qp;
449 shca->ib_device.query_qp = ehca_query_qp;
450 shca->ib_device.destroy_qp = ehca_destroy_qp;
451 shca->ib_device.post_send = ehca_post_send;
452 shca->ib_device.post_recv = ehca_post_recv;
453 shca->ib_device.create_cq = ehca_create_cq;
454 shca->ib_device.destroy_cq = ehca_destroy_cq;
455 shca->ib_device.resize_cq = ehca_resize_cq;
456 shca->ib_device.poll_cq = ehca_poll_cq;
457 /* shca->ib_device.peek_cq = ehca_peek_cq; */
458 shca->ib_device.req_notify_cq = ehca_req_notify_cq;
459 /* shca->ib_device.req_ncomp_notif = ehca_req_ncomp_notif; */
460 shca->ib_device.get_dma_mr = ehca_get_dma_mr;
461 shca->ib_device.reg_phys_mr = ehca_reg_phys_mr;
462 shca->ib_device.reg_user_mr = ehca_reg_user_mr;
463 shca->ib_device.query_mr = ehca_query_mr;
464 shca->ib_device.dereg_mr = ehca_dereg_mr;
465 shca->ib_device.rereg_phys_mr = ehca_rereg_phys_mr;
466 shca->ib_device.alloc_mw = ehca_alloc_mw;
467 shca->ib_device.bind_mw = ehca_bind_mw;
468 shca->ib_device.dealloc_mw = ehca_dealloc_mw;
469 shca->ib_device.alloc_fmr = ehca_alloc_fmr;
470 shca->ib_device.map_phys_fmr = ehca_map_phys_fmr;
471 shca->ib_device.unmap_fmr = ehca_unmap_fmr;
472 shca->ib_device.dealloc_fmr = ehca_dealloc_fmr;
473 shca->ib_device.attach_mcast = ehca_attach_mcast;
474 shca->ib_device.detach_mcast = ehca_detach_mcast;
475 shca->ib_device.process_mad = ehca_process_mad;
476 shca->ib_device.mmap = ehca_mmap;
477
478 if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
479 shca->ib_device.uverbs_cmd_mask |=
480 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
481 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
482 (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
483 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
484
485 shca->ib_device.create_srq = ehca_create_srq;
486 shca->ib_device.modify_srq = ehca_modify_srq;
487 shca->ib_device.query_srq = ehca_query_srq;
488 shca->ib_device.destroy_srq = ehca_destroy_srq;
489 shca->ib_device.post_srq_recv = ehca_post_srq_recv;
490 }
491
492 return ret;
493 }
494
495 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
496 {
497 struct ehca_sport *sport = &shca->sport[port - 1];
498 struct ib_cq *ibcq;
499 struct ib_qp *ibqp;
500 struct ib_qp_init_attr qp_init_attr;
501 int ret;
502
503 if (sport->ibcq_aqp1) {
504 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
505 return -EPERM;
506 }
507
508 ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void *)(-1), 10, 0);
509 if (IS_ERR(ibcq)) {
510 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
511 return PTR_ERR(ibcq);
512 }
513 sport->ibcq_aqp1 = ibcq;
514
515 if (sport->ibqp_sqp[IB_QPT_GSI]) {
516 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
517 ret = -EPERM;
518 goto create_aqp1;
519 }
520
521 memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
522 qp_init_attr.send_cq = ibcq;
523 qp_init_attr.recv_cq = ibcq;
524 qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
525 qp_init_attr.cap.max_send_wr = 100;
526 qp_init_attr.cap.max_recv_wr = 100;
527 qp_init_attr.cap.max_send_sge = 2;
528 qp_init_attr.cap.max_recv_sge = 1;
529 qp_init_attr.qp_type = IB_QPT_GSI;
530 qp_init_attr.port_num = port;
531 qp_init_attr.qp_context = NULL;
532 qp_init_attr.event_handler = NULL;
533 qp_init_attr.srq = NULL;
534
535 ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
536 if (IS_ERR(ibqp)) {
537 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
538 ret = PTR_ERR(ibqp);
539 goto create_aqp1;
540 }
541 sport->ibqp_sqp[IB_QPT_GSI] = ibqp;
542
543 return 0;
544
545 create_aqp1:
546 ib_destroy_cq(sport->ibcq_aqp1);
547 return ret;
548 }
549
550 static int ehca_destroy_aqp1(struct ehca_sport *sport)
551 {
552 int ret;
553
554 ret = ib_destroy_qp(sport->ibqp_sqp[IB_QPT_GSI]);
555 if (ret) {
556 ehca_gen_err("Cannot destroy AQP1 QP. ret=%i", ret);
557 return ret;
558 }
559
560 ret = ib_destroy_cq(sport->ibcq_aqp1);
561 if (ret)
562 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%i", ret);
563
564 return ret;
565 }
566
567 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
568 {
569 return snprintf(buf, PAGE_SIZE, "%d\n",
570 ehca_debug_level);
571 }
572
573 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
574 const char *buf, size_t count)
575 {
576 int value = (*buf) - '0';
577 if (value >= 0 && value <= 9)
578 ehca_debug_level = value;
579 return 1;
580 }
581
582 DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
583 ehca_show_debug_level, ehca_store_debug_level);
584
585 static struct attribute *ehca_drv_attrs[] = {
586 &driver_attr_debug_level.attr,
587 NULL
588 };
589
590 static struct attribute_group ehca_drv_attr_grp = {
591 .attrs = ehca_drv_attrs
592 };
593
594 static struct attribute_group *ehca_drv_attr_groups[] = {
595 &ehca_drv_attr_grp,
596 NULL,
597 };
598
599 #define EHCA_RESOURCE_ATTR(name) \
600 static ssize_t ehca_show_##name(struct device *dev, \
601 struct device_attribute *attr, \
602 char *buf) \
603 { \
604 struct ehca_shca *shca; \
605 struct hipz_query_hca *rblock; \
606 int data; \
607 \
608 shca = dev->driver_data; \
609 \
610 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL); \
611 if (!rblock) { \
612 dev_err(dev, "Can't allocate rblock memory.\n"); \
613 return 0; \
614 } \
615 \
616 if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
617 dev_err(dev, "Can't query device properties\n"); \
618 ehca_free_fw_ctrlblock(rblock); \
619 return 0; \
620 } \
621 \
622 data = rblock->name; \
623 ehca_free_fw_ctrlblock(rblock); \
624 \
625 if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1)) \
626 return snprintf(buf, 256, "1\n"); \
627 else \
628 return snprintf(buf, 256, "%d\n", data); \
629 \
630 } \
631 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
632
633 EHCA_RESOURCE_ATTR(num_ports);
634 EHCA_RESOURCE_ATTR(hw_ver);
635 EHCA_RESOURCE_ATTR(max_eq);
636 EHCA_RESOURCE_ATTR(cur_eq);
637 EHCA_RESOURCE_ATTR(max_cq);
638 EHCA_RESOURCE_ATTR(cur_cq);
639 EHCA_RESOURCE_ATTR(max_qp);
640 EHCA_RESOURCE_ATTR(cur_qp);
641 EHCA_RESOURCE_ATTR(max_mr);
642 EHCA_RESOURCE_ATTR(cur_mr);
643 EHCA_RESOURCE_ATTR(max_mw);
644 EHCA_RESOURCE_ATTR(cur_mw);
645 EHCA_RESOURCE_ATTR(max_pd);
646 EHCA_RESOURCE_ATTR(max_ah);
647
648 static ssize_t ehca_show_adapter_handle(struct device *dev,
649 struct device_attribute *attr,
650 char *buf)
651 {
652 struct ehca_shca *shca = dev->driver_data;
653
654 return sprintf(buf, "%lx\n", shca->ipz_hca_handle.handle);
655
656 }
657 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
658
659 static ssize_t ehca_show_mr_largepage(struct device *dev,
660 struct device_attribute *attr,
661 char *buf)
662 {
663 return sprintf(buf, "%d\n", ehca_mr_largepage);
664 }
665 static DEVICE_ATTR(mr_largepage, S_IRUGO, ehca_show_mr_largepage, NULL);
666
667 static struct attribute *ehca_dev_attrs[] = {
668 &dev_attr_adapter_handle.attr,
669 &dev_attr_num_ports.attr,
670 &dev_attr_hw_ver.attr,
671 &dev_attr_max_eq.attr,
672 &dev_attr_cur_eq.attr,
673 &dev_attr_max_cq.attr,
674 &dev_attr_cur_cq.attr,
675 &dev_attr_max_qp.attr,
676 &dev_attr_cur_qp.attr,
677 &dev_attr_max_mr.attr,
678 &dev_attr_cur_mr.attr,
679 &dev_attr_max_mw.attr,
680 &dev_attr_cur_mw.attr,
681 &dev_attr_max_pd.attr,
682 &dev_attr_max_ah.attr,
683 &dev_attr_mr_largepage.attr,
684 NULL
685 };
686
687 static struct attribute_group ehca_dev_attr_grp = {
688 .attrs = ehca_dev_attrs
689 };
690
691 static int __devinit ehca_probe(struct of_device *dev,
692 const struct of_device_id *id)
693 {
694 struct ehca_shca *shca;
695 const u64 *handle;
696 struct ib_pd *ibpd;
697 int ret, i;
698
699 handle = of_get_property(dev->node, "ibm,hca-handle", NULL);
700 if (!handle) {
701 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
702 dev->node->full_name);
703 return -ENODEV;
704 }
705
706 if (!(*handle)) {
707 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
708 dev->node->full_name);
709 return -ENODEV;
710 }
711
712 shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
713 if (!shca) {
714 ehca_gen_err("Cannot allocate shca memory.");
715 return -ENOMEM;
716 }
717 mutex_init(&shca->modify_mutex);
718 for (i = 0; i < ARRAY_SIZE(shca->sport); i++)
719 spin_lock_init(&shca->sport[i].mod_sqp_lock);
720
721 shca->ofdev = dev;
722 shca->ipz_hca_handle.handle = *handle;
723 dev->dev.driver_data = shca;
724
725 ret = ehca_sense_attributes(shca);
726 if (ret < 0) {
727 ehca_gen_err("Cannot sense eHCA attributes.");
728 goto probe1;
729 }
730
731 ret = ehca_init_device(shca);
732 if (ret) {
733 ehca_gen_err("Cannot init ehca device struct");
734 goto probe1;
735 }
736
737 /* create event queues */
738 ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, 2048);
739 if (ret) {
740 ehca_err(&shca->ib_device, "Cannot create EQ.");
741 goto probe1;
742 }
743
744 ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
745 if (ret) {
746 ehca_err(&shca->ib_device, "Cannot create NEQ.");
747 goto probe3;
748 }
749
750 /* create internal protection domain */
751 ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL);
752 if (IS_ERR(ibpd)) {
753 ehca_err(&shca->ib_device, "Cannot create internal PD.");
754 ret = PTR_ERR(ibpd);
755 goto probe4;
756 }
757
758 shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
759 shca->pd->ib_pd.device = &shca->ib_device;
760
761 /* create internal max MR */
762 ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
763
764 if (ret) {
765 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%i",
766 ret);
767 goto probe5;
768 }
769
770 ret = ib_register_device(&shca->ib_device);
771 if (ret) {
772 ehca_err(&shca->ib_device,
773 "ib_register_device() failed ret=%i", ret);
774 goto probe6;
775 }
776
777 /* create AQP1 for port 1 */
778 if (ehca_open_aqp1 == 1) {
779 shca->sport[0].port_state = IB_PORT_DOWN;
780 ret = ehca_create_aqp1(shca, 1);
781 if (ret) {
782 ehca_err(&shca->ib_device,
783 "Cannot create AQP1 for port 1.");
784 goto probe7;
785 }
786 }
787
788 /* create AQP1 for port 2 */
789 if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
790 shca->sport[1].port_state = IB_PORT_DOWN;
791 ret = ehca_create_aqp1(shca, 2);
792 if (ret) {
793 ehca_err(&shca->ib_device,
794 "Cannot create AQP1 for port 2.");
795 goto probe8;
796 }
797 }
798
799 ret = sysfs_create_group(&dev->dev.kobj, &ehca_dev_attr_grp);
800 if (ret) /* only complain; we can live without attributes */
801 ehca_err(&shca->ib_device,
802 "Cannot create device attributes ret=%d", ret);
803
804 spin_lock(&shca_list_lock);
805 list_add(&shca->shca_list, &shca_list);
806 spin_unlock(&shca_list_lock);
807
808 return 0;
809
810 probe8:
811 ret = ehca_destroy_aqp1(&shca->sport[0]);
812 if (ret)
813 ehca_err(&shca->ib_device,
814 "Cannot destroy AQP1 for port 1. ret=%i", ret);
815
816 probe7:
817 ib_unregister_device(&shca->ib_device);
818
819 probe6:
820 ret = ehca_dereg_internal_maxmr(shca);
821 if (ret)
822 ehca_err(&shca->ib_device,
823 "Cannot destroy internal MR. ret=%x", ret);
824
825 probe5:
826 ret = ehca_dealloc_pd(&shca->pd->ib_pd);
827 if (ret)
828 ehca_err(&shca->ib_device,
829 "Cannot destroy internal PD. ret=%x", ret);
830
831 probe4:
832 ret = ehca_destroy_eq(shca, &shca->neq);
833 if (ret)
834 ehca_err(&shca->ib_device,
835 "Cannot destroy NEQ. ret=%x", ret);
836
837 probe3:
838 ret = ehca_destroy_eq(shca, &shca->eq);
839 if (ret)
840 ehca_err(&shca->ib_device,
841 "Cannot destroy EQ. ret=%x", ret);
842
843 probe1:
844 ib_dealloc_device(&shca->ib_device);
845
846 return -EINVAL;
847 }
848
849 static int __devexit ehca_remove(struct of_device *dev)
850 {
851 struct ehca_shca *shca = dev->dev.driver_data;
852 int ret;
853
854 sysfs_remove_group(&dev->dev.kobj, &ehca_dev_attr_grp);
855
856 if (ehca_open_aqp1 == 1) {
857 int i;
858 for (i = 0; i < shca->num_ports; i++) {
859 ret = ehca_destroy_aqp1(&shca->sport[i]);
860 if (ret)
861 ehca_err(&shca->ib_device,
862 "Cannot destroy AQP1 for port %x "
863 "ret=%i", ret, i);
864 }
865 }
866
867 ib_unregister_device(&shca->ib_device);
868
869 ret = ehca_dereg_internal_maxmr(shca);
870 if (ret)
871 ehca_err(&shca->ib_device,
872 "Cannot destroy internal MR. ret=%i", ret);
873
874 ret = ehca_dealloc_pd(&shca->pd->ib_pd);
875 if (ret)
876 ehca_err(&shca->ib_device,
877 "Cannot destroy internal PD. ret=%i", ret);
878
879 ret = ehca_destroy_eq(shca, &shca->eq);
880 if (ret)
881 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%i", ret);
882
883 ret = ehca_destroy_eq(shca, &shca->neq);
884 if (ret)
885 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%i", ret);
886
887 ib_dealloc_device(&shca->ib_device);
888
889 spin_lock(&shca_list_lock);
890 list_del(&shca->shca_list);
891 spin_unlock(&shca_list_lock);
892
893 return ret;
894 }
895
896 static struct of_device_id ehca_device_table[] =
897 {
898 {
899 .name = "lhca",
900 .compatible = "IBM,lhca",
901 },
902 {},
903 };
904
905 static struct of_platform_driver ehca_driver = {
906 .name = "ehca",
907 .match_table = ehca_device_table,
908 .probe = ehca_probe,
909 .remove = ehca_remove,
910 .driver = {
911 .groups = ehca_drv_attr_groups,
912 },
913 };
914
915 void ehca_poll_eqs(unsigned long data)
916 {
917 struct ehca_shca *shca;
918
919 spin_lock(&shca_list_lock);
920 list_for_each_entry(shca, &shca_list, shca_list) {
921 if (shca->eq.is_initialized) {
922 /* call deadman proc only if eq ptr does not change */
923 struct ehca_eq *eq = &shca->eq;
924 int max = 3;
925 volatile u64 q_ofs, q_ofs2;
926 u64 flags;
927 spin_lock_irqsave(&eq->spinlock, flags);
928 q_ofs = eq->ipz_queue.current_q_offset;
929 spin_unlock_irqrestore(&eq->spinlock, flags);
930 do {
931 spin_lock_irqsave(&eq->spinlock, flags);
932 q_ofs2 = eq->ipz_queue.current_q_offset;
933 spin_unlock_irqrestore(&eq->spinlock, flags);
934 max--;
935 } while (q_ofs == q_ofs2 && max > 0);
936 if (q_ofs == q_ofs2)
937 ehca_process_eq(shca, 0);
938 }
939 }
940 mod_timer(&poll_eqs_timer, round_jiffies(jiffies + HZ));
941 spin_unlock(&shca_list_lock);
942 }
943
944 int __init ehca_module_init(void)
945 {
946 int ret;
947
948 printk(KERN_INFO "eHCA Infiniband Device Driver "
949 "(Version " HCAD_VERSION ")\n");
950
951 ret = ehca_create_comp_pool();
952 if (ret) {
953 ehca_gen_err("Cannot create comp pool.");
954 return ret;
955 }
956
957 ret = ehca_create_slab_caches();
958 if (ret) {
959 ehca_gen_err("Cannot create SLAB caches");
960 ret = -ENOMEM;
961 goto module_init1;
962 }
963
964 ret = ibmebus_register_driver(&ehca_driver);
965 if (ret) {
966 ehca_gen_err("Cannot register eHCA device driver");
967 ret = -EINVAL;
968 goto module_init2;
969 }
970
971 if (ehca_poll_all_eqs != 1) {
972 ehca_gen_err("WARNING!!!");
973 ehca_gen_err("It is possible to lose interrupts.");
974 } else {
975 init_timer(&poll_eqs_timer);
976 poll_eqs_timer.function = ehca_poll_eqs;
977 poll_eqs_timer.expires = jiffies + HZ;
978 add_timer(&poll_eqs_timer);
979 }
980
981 return 0;
982
983 module_init2:
984 ehca_destroy_slab_caches();
985
986 module_init1:
987 ehca_destroy_comp_pool();
988 return ret;
989 };
990
991 void __exit ehca_module_exit(void)
992 {
993 if (ehca_poll_all_eqs == 1)
994 del_timer_sync(&poll_eqs_timer);
995
996 ibmebus_unregister_driver(&ehca_driver);
997
998 ehca_destroy_slab_caches();
999
1000 ehca_destroy_comp_pool();
1001
1002 idr_destroy(&ehca_cq_idr);
1003 idr_destroy(&ehca_qp_idr);
1004 };
1005
1006 module_init(ehca_module_init);
1007 module_exit(ehca_module_exit);
mah project overlay