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fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / drivers / infiniband / hw / ehca / ehca_main.c
blob403467f66fe6975d13d2eba62745d7c03a98241d
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 #include "ehca_classes.h"
47 #include "ehca_iverbs.h"
48 #include "ehca_mrmw.h"
49 #include "ehca_tools.h"
50 #include "hcp_if.h"
51
52 #define HCAD_VERSION "0024"
53
54 MODULE_LICENSE("Dual BSD/GPL");
55 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
56 MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver");
57 MODULE_VERSION(HCAD_VERSION);
58
59 int ehca_open_aqp1 = 0;
60 int ehca_debug_level = 0;
61 int ehca_hw_level = 0;
62 int ehca_nr_ports = 2;
63 int ehca_use_hp_mr = 0;
64 int ehca_port_act_time = 30;
65 int ehca_poll_all_eqs = 1;
66 int ehca_static_rate = -1;
67 int ehca_scaling_code = 0;
68 int ehca_mr_largepage = 0;
69
70 module_param_named(open_aqp1, ehca_open_aqp1, int, S_IRUGO);
71 module_param_named(debug_level, ehca_debug_level, int, S_IRUGO);
72 module_param_named(hw_level, ehca_hw_level, int, S_IRUGO);
73 module_param_named(nr_ports, ehca_nr_ports, int, S_IRUGO);
74 module_param_named(use_hp_mr, ehca_use_hp_mr, int, S_IRUGO);
75 module_param_named(port_act_time, ehca_port_act_time, int, S_IRUGO);
76 module_param_named(poll_all_eqs, ehca_poll_all_eqs, int, S_IRUGO);
77 module_param_named(static_rate, ehca_static_rate, int, S_IRUGO);
78 module_param_named(scaling_code, ehca_scaling_code, int, S_IRUGO);
79 module_param_named(mr_largepage, ehca_mr_largepage, int, S_IRUGO);
80
81 MODULE_PARM_DESC(open_aqp1,
82 "AQP1 on startup (0: no (default), 1: yes)");
83 MODULE_PARM_DESC(debug_level,
84 "debug level"
85 " (0: no debug traces (default), 1: with debug traces)");
86 MODULE_PARM_DESC(hw_level,
87 "hardware level"
88 " (0: autosensing (default), 1: v. 0.20, 2: v. 0.21)");
89 MODULE_PARM_DESC(nr_ports,
90 "number of connected ports (default: 2)");
91 MODULE_PARM_DESC(use_hp_mr,
92 "high performance MRs (0: no (default), 1: yes)");
93 MODULE_PARM_DESC(port_act_time,
94 "time to wait for port activation (default: 30 sec)");
95 MODULE_PARM_DESC(poll_all_eqs,
96 "polls all event queues periodically"
97 " (0: no, 1: yes (default))");
98 MODULE_PARM_DESC(static_rate,
99 "set permanent static rate (default: disabled)");
100 MODULE_PARM_DESC(scaling_code,
101 "set scaling code (0: disabled/default, 1: enabled)");
102 MODULE_PARM_DESC(mr_largepage,
103 "use large page for MR (0: use PAGE_SIZE (default), "
104 "1: use large page depending on MR size");
105
106 DEFINE_RWLOCK(ehca_qp_idr_lock);
107 DEFINE_RWLOCK(ehca_cq_idr_lock);
108 DEFINE_IDR(ehca_qp_idr);
109 DEFINE_IDR(ehca_cq_idr);
110
111 static LIST_HEAD(shca_list); /* list of all registered ehcas */
112 static DEFINE_SPINLOCK(shca_list_lock);
113
114 static struct timer_list poll_eqs_timer;
115
116 #ifdef CONFIG_PPC_64K_PAGES
117 static struct kmem_cache *ctblk_cache;
118
119 void *ehca_alloc_fw_ctrlblock(gfp_t flags)
120 {
121 void *ret = kmem_cache_zalloc(ctblk_cache, flags);
122 if (!ret)
123 ehca_gen_err("Out of memory for ctblk");
124 return ret;
125 }
126
127 void ehca_free_fw_ctrlblock(void *ptr)
128 {
129 if (ptr)
130 kmem_cache_free(ctblk_cache, ptr);
131
132 }
133 #endif
134
135 int ehca2ib_return_code(u64 ehca_rc)
136 {
137 switch (ehca_rc) {
138 case H_SUCCESS:
139 return 0;
140 case H_RESOURCE: /* Resource in use */
141 case H_BUSY:
142 return -EBUSY;
143 case H_NOT_ENOUGH_RESOURCES: /* insufficient resources */
144 case H_CONSTRAINED: /* resource constraint */
145 case H_NO_MEM:
146 return -ENOMEM;
147 default:
148 return -EINVAL;
149 }
150 }
151
152 static int ehca_create_slab_caches(void)
153 {
154 int ret;
155
156 ret = ehca_init_pd_cache();
157 if (ret) {
158 ehca_gen_err("Cannot create PD SLAB cache.");
159 return ret;
160 }
161
162 ret = ehca_init_cq_cache();
163 if (ret) {
164 ehca_gen_err("Cannot create CQ SLAB cache.");
165 goto create_slab_caches2;
166 }
167
168 ret = ehca_init_qp_cache();
169 if (ret) {
170 ehca_gen_err("Cannot create QP SLAB cache.");
171 goto create_slab_caches3;
172 }
173
174 ret = ehca_init_av_cache();
175 if (ret) {
176 ehca_gen_err("Cannot create AV SLAB cache.");
177 goto create_slab_caches4;
178 }
179
180 ret = ehca_init_mrmw_cache();
181 if (ret) {
182 ehca_gen_err("Cannot create MR&MW SLAB cache.");
183 goto create_slab_caches5;
184 }
185
186 ret = ehca_init_small_qp_cache();
187 if (ret) {
188 ehca_gen_err("Cannot create small queue SLAB cache.");
189 goto create_slab_caches6;
190 }
191
192 #ifdef CONFIG_PPC_64K_PAGES
193 ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
194 EHCA_PAGESIZE, H_CB_ALIGNMENT,
195 SLAB_HWCACHE_ALIGN,
196 NULL);
197 if (!ctblk_cache) {
198 ehca_gen_err("Cannot create ctblk SLAB cache.");
199 ehca_cleanup_small_qp_cache();
200 goto create_slab_caches6;
201 }
202 #endif
203 return 0;
204
205 create_slab_caches6:
206 ehca_cleanup_mrmw_cache();
207
208 create_slab_caches5:
209 ehca_cleanup_av_cache();
210
211 create_slab_caches4:
212 ehca_cleanup_qp_cache();
213
214 create_slab_caches3:
215 ehca_cleanup_cq_cache();
216
217 create_slab_caches2:
218 ehca_cleanup_pd_cache();
219
220 return ret;
221 }
222
223 static void ehca_destroy_slab_caches(void)
224 {
225 ehca_cleanup_small_qp_cache();
226 ehca_cleanup_mrmw_cache();
227 ehca_cleanup_av_cache();
228 ehca_cleanup_qp_cache();
229 ehca_cleanup_cq_cache();
230 ehca_cleanup_pd_cache();
231 #ifdef CONFIG_PPC_64K_PAGES
232 if (ctblk_cache)
233 kmem_cache_destroy(ctblk_cache);
234 #endif
235 }
236
237 #define EHCA_HCAAVER EHCA_BMASK_IBM(32, 39)
238 #define EHCA_REVID EHCA_BMASK_IBM(40, 63)
239
240 static struct cap_descr {
241 u64 mask;
242 char *descr;
243 } hca_cap_descr[] = {
244 { HCA_CAP_AH_PORT_NR_CHECK, "HCA_CAP_AH_PORT_NR_CHECK" },
245 { HCA_CAP_ATOMIC, "HCA_CAP_ATOMIC" },
246 { HCA_CAP_AUTO_PATH_MIG, "HCA_CAP_AUTO_PATH_MIG" },
247 { HCA_CAP_BAD_P_KEY_CTR, "HCA_CAP_BAD_P_KEY_CTR" },
248 { HCA_CAP_SQD_RTS_PORT_CHANGE, "HCA_CAP_SQD_RTS_PORT_CHANGE" },
249 { HCA_CAP_CUR_QP_STATE_MOD, "HCA_CAP_CUR_QP_STATE_MOD" },
250 { HCA_CAP_INIT_TYPE, "HCA_CAP_INIT_TYPE" },
251 { HCA_CAP_PORT_ACTIVE_EVENT, "HCA_CAP_PORT_ACTIVE_EVENT" },
252 { HCA_CAP_Q_KEY_VIOL_CTR, "HCA_CAP_Q_KEY_VIOL_CTR" },
253 { HCA_CAP_WQE_RESIZE, "HCA_CAP_WQE_RESIZE" },
254 { HCA_CAP_RAW_PACKET_MCAST, "HCA_CAP_RAW_PACKET_MCAST" },
255 { HCA_CAP_SHUTDOWN_PORT, "HCA_CAP_SHUTDOWN_PORT" },
256 { HCA_CAP_RC_LL_QP, "HCA_CAP_RC_LL_QP" },
257 { HCA_CAP_SRQ, "HCA_CAP_SRQ" },
258 { HCA_CAP_UD_LL_QP, "HCA_CAP_UD_LL_QP" },
259 { HCA_CAP_RESIZE_MR, "HCA_CAP_RESIZE_MR" },
260 { HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" },
261 };
262
263 int ehca_sense_attributes(struct ehca_shca *shca)
264 {
265 int i, ret = 0;
266 u64 h_ret;
267 struct hipz_query_hca *rblock;
268 struct hipz_query_port *port;
269
270 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
271 if (!rblock) {
272 ehca_gen_err("Cannot allocate rblock memory.");
273 return -ENOMEM;
274 }
275
276 h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
277 if (h_ret != H_SUCCESS) {
278 ehca_gen_err("Cannot query device properties. h_ret=%li",
279 h_ret);
280 ret = -EPERM;
281 goto sense_attributes1;
282 }
283
284 if (ehca_nr_ports == 1)
285 shca->num_ports = 1;
286 else
287 shca->num_ports = (u8)rblock->num_ports;
288
289 ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
290
291 if (ehca_hw_level == 0) {
292 u32 hcaaver;
293 u32 revid;
294
295 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
296 revid = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
297
298 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
299
300 if (hcaaver == 1) {
301 if (revid <= 3)
302 shca->hw_level = 0x10 | (revid + 1);
303 else
304 shca->hw_level = 0x14;
305 } else if (hcaaver == 2) {
306 if (revid == 0)
307 shca->hw_level = 0x21;
308 else if (revid == 0x10)
309 shca->hw_level = 0x22;
310 else if (revid == 0x20 || revid == 0x21)
311 shca->hw_level = 0x23;
312 }
313
314 if (!shca->hw_level) {
315 ehca_gen_warn("unknown hardware version"
316 " - assuming default level");
317 shca->hw_level = 0x22;
318 }
319 } else
320 shca->hw_level = ehca_hw_level;
321 ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
322
323 shca->sport[0].rate = IB_RATE_30_GBPS;
324 shca->sport[1].rate = IB_RATE_30_GBPS;
325
326 shca->hca_cap = rblock->hca_cap_indicators;
327 ehca_gen_dbg(" ... HCA capabilities:");
328 for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
329 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
330 ehca_gen_dbg(" %s", hca_cap_descr[i].descr);
331
332 shca->hca_cap_mr_pgsize = rblock->memory_page_size_supported;
333
334 port = (struct hipz_query_port *)rblock;
335 h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
336 if (h_ret != H_SUCCESS) {
337 ehca_gen_err("Cannot query port properties. h_ret=%li",
338 h_ret);
339 ret = -EPERM;
340 goto sense_attributes1;
341 }
342
343 shca->max_mtu = port->max_mtu;
344
345 sense_attributes1:
346 ehca_free_fw_ctrlblock(rblock);
347 return ret;
348 }
349
350 static int init_node_guid(struct ehca_shca *shca)
351 {
352 int ret = 0;
353 struct hipz_query_hca *rblock;
354
355 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
356 if (!rblock) {
357 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
358 return -ENOMEM;
359 }
360
361 if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
362 ehca_err(&shca->ib_device, "Can't query device properties");
363 ret = -EINVAL;
364 goto init_node_guid1;
365 }
366
367 memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
368
369 init_node_guid1:
370 ehca_free_fw_ctrlblock(rblock);
371 return ret;
372 }
373
374 int ehca_init_device(struct ehca_shca *shca)
375 {
376 int ret;
377
378 ret = init_node_guid(shca);
379 if (ret)
380 return ret;
381
382 strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
383 shca->ib_device.owner = THIS_MODULE;
384
385 shca->ib_device.uverbs_abi_ver = 8;
386 shca->ib_device.uverbs_cmd_mask =
387 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
388 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
389 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
390 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
391 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
392 (1ull << IB_USER_VERBS_CMD_REG_MR) |
393 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
394 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
395 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
396 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
397 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
398 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
399 (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
400 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
401 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) |
402 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
403
404 shca->ib_device.node_type = RDMA_NODE_IB_CA;
405 shca->ib_device.phys_port_cnt = shca->num_ports;
406 shca->ib_device.num_comp_vectors = 1;
407 shca->ib_device.dma_device = &shca->ibmebus_dev->ofdev.dev;
408 shca->ib_device.query_device = ehca_query_device;
409 shca->ib_device.query_port = ehca_query_port;
410 shca->ib_device.query_gid = ehca_query_gid;
411 shca->ib_device.query_pkey = ehca_query_pkey;
412 /* shca->in_device.modify_device = ehca_modify_device */
413 shca->ib_device.modify_port = ehca_modify_port;
414 shca->ib_device.alloc_ucontext = ehca_alloc_ucontext;
415 shca->ib_device.dealloc_ucontext = ehca_dealloc_ucontext;
416 shca->ib_device.alloc_pd = ehca_alloc_pd;
417 shca->ib_device.dealloc_pd = ehca_dealloc_pd;
418 shca->ib_device.create_ah = ehca_create_ah;
419 /* shca->ib_device.modify_ah = ehca_modify_ah; */
420 shca->ib_device.query_ah = ehca_query_ah;
421 shca->ib_device.destroy_ah = ehca_destroy_ah;
422 shca->ib_device.create_qp = ehca_create_qp;
423 shca->ib_device.modify_qp = ehca_modify_qp;
424 shca->ib_device.query_qp = ehca_query_qp;
425 shca->ib_device.destroy_qp = ehca_destroy_qp;
426 shca->ib_device.post_send = ehca_post_send;
427 shca->ib_device.post_recv = ehca_post_recv;
428 shca->ib_device.create_cq = ehca_create_cq;
429 shca->ib_device.destroy_cq = ehca_destroy_cq;
430 shca->ib_device.resize_cq = ehca_resize_cq;
431 shca->ib_device.poll_cq = ehca_poll_cq;
432 /* shca->ib_device.peek_cq = ehca_peek_cq; */
433 shca->ib_device.req_notify_cq = ehca_req_notify_cq;
434 /* shca->ib_device.req_ncomp_notif = ehca_req_ncomp_notif; */
435 shca->ib_device.get_dma_mr = ehca_get_dma_mr;
436 shca->ib_device.reg_phys_mr = ehca_reg_phys_mr;
437 shca->ib_device.reg_user_mr = ehca_reg_user_mr;
438 shca->ib_device.query_mr = ehca_query_mr;
439 shca->ib_device.dereg_mr = ehca_dereg_mr;
440 shca->ib_device.rereg_phys_mr = ehca_rereg_phys_mr;
441 shca->ib_device.alloc_mw = ehca_alloc_mw;
442 shca->ib_device.bind_mw = ehca_bind_mw;
443 shca->ib_device.dealloc_mw = ehca_dealloc_mw;
444 shca->ib_device.alloc_fmr = ehca_alloc_fmr;
445 shca->ib_device.map_phys_fmr = ehca_map_phys_fmr;
446 shca->ib_device.unmap_fmr = ehca_unmap_fmr;
447 shca->ib_device.dealloc_fmr = ehca_dealloc_fmr;
448 shca->ib_device.attach_mcast = ehca_attach_mcast;
449 shca->ib_device.detach_mcast = ehca_detach_mcast;
450 /* shca->ib_device.process_mad = ehca_process_mad; */
451 shca->ib_device.mmap = ehca_mmap;
452
453 if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
454 shca->ib_device.uverbs_cmd_mask |=
455 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
456 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
457 (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
458 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
459
460 shca->ib_device.create_srq = ehca_create_srq;
461 shca->ib_device.modify_srq = ehca_modify_srq;
462 shca->ib_device.query_srq = ehca_query_srq;
463 shca->ib_device.destroy_srq = ehca_destroy_srq;
464 shca->ib_device.post_srq_recv = ehca_post_srq_recv;
465 }
466
467 return ret;
468 }
469
470 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
471 {
472 struct ehca_sport *sport = &shca->sport[port - 1];
473 struct ib_cq *ibcq;
474 struct ib_qp *ibqp;
475 struct ib_qp_init_attr qp_init_attr;
476 int ret;
477
478 if (sport->ibcq_aqp1) {
479 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
480 return -EPERM;
481 }
482
483 ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void *)(-1), 10, 0);
484 if (IS_ERR(ibcq)) {
485 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
486 return PTR_ERR(ibcq);
487 }
488 sport->ibcq_aqp1 = ibcq;
489
490 if (sport->ibqp_aqp1) {
491 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
492 ret = -EPERM;
493 goto create_aqp1;
494 }
495
496 memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
497 qp_init_attr.send_cq = ibcq;
498 qp_init_attr.recv_cq = ibcq;
499 qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
500 qp_init_attr.cap.max_send_wr = 100;
501 qp_init_attr.cap.max_recv_wr = 100;
502 qp_init_attr.cap.max_send_sge = 2;
503 qp_init_attr.cap.max_recv_sge = 1;
504 qp_init_attr.qp_type = IB_QPT_GSI;
505 qp_init_attr.port_num = port;
506 qp_init_attr.qp_context = NULL;
507 qp_init_attr.event_handler = NULL;
508 qp_init_attr.srq = NULL;
509
510 ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
511 if (IS_ERR(ibqp)) {
512 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
513 ret = PTR_ERR(ibqp);
514 goto create_aqp1;
515 }
516 sport->ibqp_aqp1 = ibqp;
517
518 return 0;
519
520 create_aqp1:
521 ib_destroy_cq(sport->ibcq_aqp1);
522 return ret;
523 }
524
525 static int ehca_destroy_aqp1(struct ehca_sport *sport)
526 {
527 int ret;
528
529 ret = ib_destroy_qp(sport->ibqp_aqp1);
530 if (ret) {
531 ehca_gen_err("Cannot destroy AQP1 QP. ret=%i", ret);
532 return ret;
533 }
534
535 ret = ib_destroy_cq(sport->ibcq_aqp1);
536 if (ret)
537 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%i", ret);
538
539 return ret;
540 }
541
542 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
543 {
544 return snprintf(buf, PAGE_SIZE, "%d\n",
545 ehca_debug_level);
546 }
547
548 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
549 const char *buf, size_t count)
550 {
551 int value = (*buf) - '0';
552 if (value >= 0 && value <= 9)
553 ehca_debug_level = value;
554 return 1;
555 }
556
557 DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
558 ehca_show_debug_level, ehca_store_debug_level);
559
560 static struct attribute *ehca_drv_attrs[] = {
561 &driver_attr_debug_level.attr,
562 NULL
563 };
564
565 static struct attribute_group ehca_drv_attr_grp = {
566 .attrs = ehca_drv_attrs
567 };
568
569 #define EHCA_RESOURCE_ATTR(name) \
570 static ssize_t ehca_show_##name(struct device *dev, \
571 struct device_attribute *attr, \
572 char *buf) \
573 { \
574 struct ehca_shca *shca; \
575 struct hipz_query_hca *rblock; \
576 int data; \
577 \
578 shca = dev->driver_data; \
579 \
580 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL); \
581 if (!rblock) { \
582 dev_err(dev, "Can't allocate rblock memory."); \
583 return 0; \
584 } \
585 \
586 if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
587 dev_err(dev, "Can't query device properties"); \
588 ehca_free_fw_ctrlblock(rblock); \
589 return 0; \
590 } \
591 \
592 data = rblock->name; \
593 ehca_free_fw_ctrlblock(rblock); \
594 \
595 if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1)) \
596 return snprintf(buf, 256, "1\n"); \
597 else \
598 return snprintf(buf, 256, "%d\n", data); \
599 \
600 } \
601 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
602
603 EHCA_RESOURCE_ATTR(num_ports);
604 EHCA_RESOURCE_ATTR(hw_ver);
605 EHCA_RESOURCE_ATTR(max_eq);
606 EHCA_RESOURCE_ATTR(cur_eq);
607 EHCA_RESOURCE_ATTR(max_cq);
608 EHCA_RESOURCE_ATTR(cur_cq);
609 EHCA_RESOURCE_ATTR(max_qp);
610 EHCA_RESOURCE_ATTR(cur_qp);
611 EHCA_RESOURCE_ATTR(max_mr);
612 EHCA_RESOURCE_ATTR(cur_mr);
613 EHCA_RESOURCE_ATTR(max_mw);
614 EHCA_RESOURCE_ATTR(cur_mw);
615 EHCA_RESOURCE_ATTR(max_pd);
616 EHCA_RESOURCE_ATTR(max_ah);
617
618 static ssize_t ehca_show_adapter_handle(struct device *dev,
619 struct device_attribute *attr,
620 char *buf)
621 {
622 struct ehca_shca *shca = dev->driver_data;
623
624 return sprintf(buf, "%lx\n", shca->ipz_hca_handle.handle);
625
626 }
627 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
628
629 static ssize_t ehca_show_mr_largepage(struct device *dev,
630 struct device_attribute *attr,
631 char *buf)
632 {
633 return sprintf(buf, "%d\n", ehca_mr_largepage);
634 }
635 static DEVICE_ATTR(mr_largepage, S_IRUGO, ehca_show_mr_largepage, NULL);
636
637 static struct attribute *ehca_dev_attrs[] = {
638 &dev_attr_adapter_handle.attr,
639 &dev_attr_num_ports.attr,
640 &dev_attr_hw_ver.attr,
641 &dev_attr_max_eq.attr,
642 &dev_attr_cur_eq.attr,
643 &dev_attr_max_cq.attr,
644 &dev_attr_cur_cq.attr,
645 &dev_attr_max_qp.attr,
646 &dev_attr_cur_qp.attr,
647 &dev_attr_max_mr.attr,
648 &dev_attr_cur_mr.attr,
649 &dev_attr_max_mw.attr,
650 &dev_attr_cur_mw.attr,
651 &dev_attr_max_pd.attr,
652 &dev_attr_max_ah.attr,
653 &dev_attr_mr_largepage.attr,
654 NULL
655 };
656
657 static struct attribute_group ehca_dev_attr_grp = {
658 .attrs = ehca_dev_attrs
659 };
660
661 static int __devinit ehca_probe(struct ibmebus_dev *dev,
662 const struct of_device_id *id)
663 {
664 struct ehca_shca *shca;
665 const u64 *handle;
666 struct ib_pd *ibpd;
667 int ret;
668
669 handle = of_get_property(dev->ofdev.node, "ibm,hca-handle", NULL);
670 if (!handle) {
671 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
672 dev->ofdev.node->full_name);
673 return -ENODEV;
674 }
675
676 if (!(*handle)) {
677 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
678 dev->ofdev.node->full_name);
679 return -ENODEV;
680 }
681
682 shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
683 if (!shca) {
684 ehca_gen_err("Cannot allocate shca memory.");
685 return -ENOMEM;
686 }
687 mutex_init(&shca->modify_mutex);
688
689 shca->ibmebus_dev = dev;
690 shca->ipz_hca_handle.handle = *handle;
691 dev->ofdev.dev.driver_data = shca;
692
693 ret = ehca_sense_attributes(shca);
694 if (ret < 0) {
695 ehca_gen_err("Cannot sense eHCA attributes.");
696 goto probe1;
697 }
698
699 ret = ehca_init_device(shca);
700 if (ret) {
701 ehca_gen_err("Cannot init ehca device struct");
702 goto probe1;
703 }
704
705 /* create event queues */
706 ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, 2048);
707 if (ret) {
708 ehca_err(&shca->ib_device, "Cannot create EQ.");
709 goto probe1;
710 }
711
712 ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
713 if (ret) {
714 ehca_err(&shca->ib_device, "Cannot create NEQ.");
715 goto probe3;
716 }
717
718 /* create internal protection domain */
719 ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL);
720 if (IS_ERR(ibpd)) {
721 ehca_err(&shca->ib_device, "Cannot create internal PD.");
722 ret = PTR_ERR(ibpd);
723 goto probe4;
724 }
725
726 shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
727 shca->pd->ib_pd.device = &shca->ib_device;
728
729 /* create internal max MR */
730 ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
731
732 if (ret) {
733 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%i",
734 ret);
735 goto probe5;
736 }
737
738 ret = ib_register_device(&shca->ib_device);
739 if (ret) {
740 ehca_err(&shca->ib_device,
741 "ib_register_device() failed ret=%i", ret);
742 goto probe6;
743 }
744
745 /* create AQP1 for port 1 */
746 if (ehca_open_aqp1 == 1) {
747 shca->sport[0].port_state = IB_PORT_DOWN;
748 ret = ehca_create_aqp1(shca, 1);
749 if (ret) {
750 ehca_err(&shca->ib_device,
751 "Cannot create AQP1 for port 1.");
752 goto probe7;
753 }
754 }
755
756 /* create AQP1 for port 2 */
757 if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
758 shca->sport[1].port_state = IB_PORT_DOWN;
759 ret = ehca_create_aqp1(shca, 2);
760 if (ret) {
761 ehca_err(&shca->ib_device,
762 "Cannot create AQP1 for port 2.");
763 goto probe8;
764 }
765 }
766
767 ret = sysfs_create_group(&dev->ofdev.dev.kobj, &ehca_dev_attr_grp);
768 if (ret) /* only complain; we can live without attributes */
769 ehca_err(&shca->ib_device,
770 "Cannot create device attributes ret=%d", ret);
771
772 spin_lock(&shca_list_lock);
773 list_add(&shca->shca_list, &shca_list);
774 spin_unlock(&shca_list_lock);
775
776 return 0;
777
778 probe8:
779 ret = ehca_destroy_aqp1(&shca->sport[0]);
780 if (ret)
781 ehca_err(&shca->ib_device,
782 "Cannot destroy AQP1 for port 1. ret=%i", ret);
783
784 probe7:
785 ib_unregister_device(&shca->ib_device);
786
787 probe6:
788 ret = ehca_dereg_internal_maxmr(shca);
789 if (ret)
790 ehca_err(&shca->ib_device,
791 "Cannot destroy internal MR. ret=%x", ret);
792
793 probe5:
794 ret = ehca_dealloc_pd(&shca->pd->ib_pd);
795 if (ret)
796 ehca_err(&shca->ib_device,
797 "Cannot destroy internal PD. ret=%x", ret);
798
799 probe4:
800 ret = ehca_destroy_eq(shca, &shca->neq);
801 if (ret)
802 ehca_err(&shca->ib_device,
803 "Cannot destroy NEQ. ret=%x", ret);
804
805 probe3:
806 ret = ehca_destroy_eq(shca, &shca->eq);
807 if (ret)
808 ehca_err(&shca->ib_device,
809 "Cannot destroy EQ. ret=%x", ret);
810
811 probe1:
812 ib_dealloc_device(&shca->ib_device);
813
814 return -EINVAL;
815 }
816
817 static int __devexit ehca_remove(struct ibmebus_dev *dev)
818 {
819 struct ehca_shca *shca = dev->ofdev.dev.driver_data;
820 int ret;
821
822 sysfs_remove_group(&dev->ofdev.dev.kobj, &ehca_dev_attr_grp);
823
824 if (ehca_open_aqp1 == 1) {
825 int i;
826 for (i = 0; i < shca->num_ports; i++) {
827 ret = ehca_destroy_aqp1(&shca->sport[i]);
828 if (ret)
829 ehca_err(&shca->ib_device,
830 "Cannot destroy AQP1 for port %x "
831 "ret=%i", ret, i);
832 }
833 }
834
835 ib_unregister_device(&shca->ib_device);
836
837 ret = ehca_dereg_internal_maxmr(shca);
838 if (ret)
839 ehca_err(&shca->ib_device,
840 "Cannot destroy internal MR. ret=%i", ret);
841
842 ret = ehca_dealloc_pd(&shca->pd->ib_pd);
843 if (ret)
844 ehca_err(&shca->ib_device,
845 "Cannot destroy internal PD. ret=%i", ret);
846
847 ret = ehca_destroy_eq(shca, &shca->eq);
848 if (ret)
849 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%i", ret);
850
851 ret = ehca_destroy_eq(shca, &shca->neq);
852 if (ret)
853 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%i", ret);
854
855 ib_dealloc_device(&shca->ib_device);
856
857 spin_lock(&shca_list_lock);
858 list_del(&shca->shca_list);
859 spin_unlock(&shca_list_lock);
860
861 return ret;
862 }
863
864 static struct of_device_id ehca_device_table[] =
865 {
866 {
867 .name = "lhca",
868 .compatible = "IBM,lhca",
869 },
870 {},
871 };
872
873 static struct ibmebus_driver ehca_driver = {
874 .name = "ehca",
875 .id_table = ehca_device_table,
876 .probe = ehca_probe,
877 .remove = ehca_remove,
878 };
879
880 void ehca_poll_eqs(unsigned long data)
881 {
882 struct ehca_shca *shca;
883
884 spin_lock(&shca_list_lock);
885 list_for_each_entry(shca, &shca_list, shca_list) {
886 if (shca->eq.is_initialized) {
887 /* call deadman proc only if eq ptr does not change */
888 struct ehca_eq *eq = &shca->eq;
889 int max = 3;
890 volatile u64 q_ofs, q_ofs2;
891 u64 flags;
892 spin_lock_irqsave(&eq->spinlock, flags);
893 q_ofs = eq->ipz_queue.current_q_offset;
894 spin_unlock_irqrestore(&eq->spinlock, flags);
895 do {
896 spin_lock_irqsave(&eq->spinlock, flags);
897 q_ofs2 = eq->ipz_queue.current_q_offset;
898 spin_unlock_irqrestore(&eq->spinlock, flags);
899 max--;
900 } while (q_ofs == q_ofs2 && max > 0);
901 if (q_ofs == q_ofs2)
902 ehca_process_eq(shca, 0);
903 }
904 }
905 mod_timer(&poll_eqs_timer, jiffies + HZ);
906 spin_unlock(&shca_list_lock);
907 }
908
909 int __init ehca_module_init(void)
910 {
911 int ret;
912
913 printk(KERN_INFO "eHCA Infiniband Device Driver "
914 "(Version " HCAD_VERSION ")\n");
915
916 ret = ehca_create_comp_pool();
917 if (ret) {
918 ehca_gen_err("Cannot create comp pool.");
919 return ret;
920 }
921
922 ret = ehca_create_slab_caches();
923 if (ret) {
924 ehca_gen_err("Cannot create SLAB caches");
925 ret = -ENOMEM;
926 goto module_init1;
927 }
928
929 ret = ibmebus_register_driver(&ehca_driver);
930 if (ret) {
931 ehca_gen_err("Cannot register eHCA device driver");
932 ret = -EINVAL;
933 goto module_init2;
934 }
935
936 ret = sysfs_create_group(&ehca_driver.driver.kobj, &ehca_drv_attr_grp);
937 if (ret) /* only complain; we can live without attributes */
938 ehca_gen_err("Cannot create driver attributes ret=%d", ret);
939
940 if (ehca_poll_all_eqs != 1) {
941 ehca_gen_err("WARNING!!!");
942 ehca_gen_err("It is possible to lose interrupts.");
943 } else {
944 init_timer(&poll_eqs_timer);
945 poll_eqs_timer.function = ehca_poll_eqs;
946 poll_eqs_timer.expires = jiffies + HZ;
947 add_timer(&poll_eqs_timer);
948 }
949
950 return 0;
951
952 module_init2:
953 ehca_destroy_slab_caches();
954
955 module_init1:
956 ehca_destroy_comp_pool();
957 return ret;
958 };
959
960 void __exit ehca_module_exit(void)
961 {
962 if (ehca_poll_all_eqs == 1)
963 del_timer_sync(&poll_eqs_timer);
964
965 sysfs_remove_group(&ehca_driver.driver.kobj, &ehca_drv_attr_grp);
966 ibmebus_unregister_driver(&ehca_driver);
967
968 ehca_destroy_slab_caches();
969
970 ehca_destroy_comp_pool();
971
972 idr_destroy(&ehca_cq_idr);
973 idr_destroy(&ehca_qp_idr);
974 };
975
976 module_init(ehca_module_init);
977 module_exit(ehca_module_exit);
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