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[mirror_ubuntu-zesty-kernel.git] / drivers / infiniband / hw / ehca / ehca_main.c
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 <linux/notifier.h>
48 #include <linux/memory.h>
49 #include "ehca_classes.h"
50 #include "ehca_iverbs.h"
51 #include "ehca_mrmw.h"
52 #include "ehca_tools.h"
53 #include "hcp_if.h"
54
55 #define HCAD_VERSION "0029"
56
57 MODULE_LICENSE("Dual BSD/GPL");
58 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
59 MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver");
60 MODULE_VERSION(HCAD_VERSION);
61
62 static int ehca_open_aqp1 = 0;
63 static int ehca_hw_level = 0;
64 static int ehca_poll_all_eqs = 1;
65
66 int ehca_debug_level = 0;
67 int ehca_nr_ports = -1;
68 int ehca_use_hp_mr = 0;
69 int ehca_port_act_time = 30;
70 int ehca_static_rate = -1;
71 int ehca_scaling_code = 0;
72 int ehca_lock_hcalls = -1;
73 int ehca_max_cq = -1;
74 int ehca_max_qp = -1;
75
76 module_param_named(open_aqp1, ehca_open_aqp1, bool, S_IRUGO);
77 module_param_named(debug_level, ehca_debug_level, int, S_IRUGO);
78 module_param_named(hw_level, ehca_hw_level, int, S_IRUGO);
79 module_param_named(nr_ports, ehca_nr_ports, int, S_IRUGO);
80 module_param_named(use_hp_mr, ehca_use_hp_mr, bool, S_IRUGO);
81 module_param_named(port_act_time, ehca_port_act_time, int, S_IRUGO);
82 module_param_named(poll_all_eqs, ehca_poll_all_eqs, bool, S_IRUGO);
83 module_param_named(static_rate, ehca_static_rate, int, S_IRUGO);
84 module_param_named(scaling_code, ehca_scaling_code, bool, S_IRUGO);
85 module_param_named(lock_hcalls, ehca_lock_hcalls, bool, S_IRUGO);
86 module_param_named(number_of_cqs, ehca_max_cq, int, S_IRUGO);
87 module_param_named(number_of_qps, ehca_max_qp, int, S_IRUGO);
88
89 MODULE_PARM_DESC(open_aqp1,
90 "Open AQP1 on startup (default: no)");
91 MODULE_PARM_DESC(debug_level,
92 "Amount of debug output (0: none (default), 1: traces, "
93 "2: some dumps, 3: lots)");
94 MODULE_PARM_DESC(hw_level,
95 "Hardware level (0: autosensing (default), "
96 "0x10..0x14: eHCA, 0x20..0x23: eHCA2)");
97 MODULE_PARM_DESC(nr_ports,
98 "number of connected ports (-1: autodetect (default), "
99 "1: port one only, 2: two ports)");
100 MODULE_PARM_DESC(use_hp_mr,
101 "Use high performance MRs (default: no)");
102 MODULE_PARM_DESC(port_act_time,
103 "Time to wait for port activation (default: 30 sec)");
104 MODULE_PARM_DESC(poll_all_eqs,
105 "Poll all event queues periodically (default: yes)");
106 MODULE_PARM_DESC(static_rate,
107 "Set permanent static rate (default: no static rate)");
108 MODULE_PARM_DESC(scaling_code,
109 "Enable scaling code (default: no)");
110 MODULE_PARM_DESC(lock_hcalls,
111 "Serialize all hCalls made by the driver "
112 "(default: autodetect)");
113 MODULE_PARM_DESC(number_of_cqs,
114 "Max number of CQs which can be allocated "
115 "(default: autodetect)");
116 MODULE_PARM_DESC(number_of_qps,
117 "Max number of QPs which can be allocated "
118 "(default: autodetect)");
119
120 DEFINE_RWLOCK(ehca_qp_idr_lock);
121 DEFINE_RWLOCK(ehca_cq_idr_lock);
122 DEFINE_IDR(ehca_qp_idr);
123 DEFINE_IDR(ehca_cq_idr);
124
125 static LIST_HEAD(shca_list); /* list of all registered ehcas */
126 DEFINE_SPINLOCK(shca_list_lock);
127
128 static struct timer_list poll_eqs_timer;
129
130 #ifdef CONFIG_PPC_64K_PAGES
131 static struct kmem_cache *ctblk_cache;
132
133 void *ehca_alloc_fw_ctrlblock(gfp_t flags)
134 {
135 void *ret = kmem_cache_zalloc(ctblk_cache, flags);
136 if (!ret)
137 ehca_gen_err("Out of memory for ctblk");
138 return ret;
139 }
140
141 void ehca_free_fw_ctrlblock(void *ptr)
142 {
143 if (ptr)
144 kmem_cache_free(ctblk_cache, ptr);
145
146 }
147 #endif
148
149 int ehca2ib_return_code(u64 ehca_rc)
150 {
151 switch (ehca_rc) {
152 case H_SUCCESS:
153 return 0;
154 case H_RESOURCE: /* Resource in use */
155 case H_BUSY:
156 return -EBUSY;
157 case H_NOT_ENOUGH_RESOURCES: /* insufficient resources */
158 case H_CONSTRAINED: /* resource constraint */
159 case H_NO_MEM:
160 return -ENOMEM;
161 default:
162 return -EINVAL;
163 }
164 }
165
166 static int ehca_create_slab_caches(void)
167 {
168 int ret;
169
170 ret = ehca_init_pd_cache();
171 if (ret) {
172 ehca_gen_err("Cannot create PD SLAB cache.");
173 return ret;
174 }
175
176 ret = ehca_init_cq_cache();
177 if (ret) {
178 ehca_gen_err("Cannot create CQ SLAB cache.");
179 goto create_slab_caches2;
180 }
181
182 ret = ehca_init_qp_cache();
183 if (ret) {
184 ehca_gen_err("Cannot create QP SLAB cache.");
185 goto create_slab_caches3;
186 }
187
188 ret = ehca_init_av_cache();
189 if (ret) {
190 ehca_gen_err("Cannot create AV SLAB cache.");
191 goto create_slab_caches4;
192 }
193
194 ret = ehca_init_mrmw_cache();
195 if (ret) {
196 ehca_gen_err("Cannot create MR&MW SLAB cache.");
197 goto create_slab_caches5;
198 }
199
200 ret = ehca_init_small_qp_cache();
201 if (ret) {
202 ehca_gen_err("Cannot create small queue SLAB cache.");
203 goto create_slab_caches6;
204 }
205
206 #ifdef CONFIG_PPC_64K_PAGES
207 ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
208 EHCA_PAGESIZE, H_CB_ALIGNMENT,
209 SLAB_HWCACHE_ALIGN,
210 NULL);
211 if (!ctblk_cache) {
212 ehca_gen_err("Cannot create ctblk SLAB cache.");
213 ehca_cleanup_small_qp_cache();
214 goto create_slab_caches6;
215 }
216 #endif
217 return 0;
218
219 create_slab_caches6:
220 ehca_cleanup_mrmw_cache();
221
222 create_slab_caches5:
223 ehca_cleanup_av_cache();
224
225 create_slab_caches4:
226 ehca_cleanup_qp_cache();
227
228 create_slab_caches3:
229 ehca_cleanup_cq_cache();
230
231 create_slab_caches2:
232 ehca_cleanup_pd_cache();
233
234 return ret;
235 }
236
237 static void ehca_destroy_slab_caches(void)
238 {
239 ehca_cleanup_small_qp_cache();
240 ehca_cleanup_mrmw_cache();
241 ehca_cleanup_av_cache();
242 ehca_cleanup_qp_cache();
243 ehca_cleanup_cq_cache();
244 ehca_cleanup_pd_cache();
245 #ifdef CONFIG_PPC_64K_PAGES
246 if (ctblk_cache)
247 kmem_cache_destroy(ctblk_cache);
248 #endif
249 }
250
251 #define EHCA_HCAAVER EHCA_BMASK_IBM(32, 39)
252 #define EHCA_REVID EHCA_BMASK_IBM(40, 63)
253
254 static struct cap_descr {
255 u64 mask;
256 char *descr;
257 } hca_cap_descr[] = {
258 { HCA_CAP_AH_PORT_NR_CHECK, "HCA_CAP_AH_PORT_NR_CHECK" },
259 { HCA_CAP_ATOMIC, "HCA_CAP_ATOMIC" },
260 { HCA_CAP_AUTO_PATH_MIG, "HCA_CAP_AUTO_PATH_MIG" },
261 { HCA_CAP_BAD_P_KEY_CTR, "HCA_CAP_BAD_P_KEY_CTR" },
262 { HCA_CAP_SQD_RTS_PORT_CHANGE, "HCA_CAP_SQD_RTS_PORT_CHANGE" },
263 { HCA_CAP_CUR_QP_STATE_MOD, "HCA_CAP_CUR_QP_STATE_MOD" },
264 { HCA_CAP_INIT_TYPE, "HCA_CAP_INIT_TYPE" },
265 { HCA_CAP_PORT_ACTIVE_EVENT, "HCA_CAP_PORT_ACTIVE_EVENT" },
266 { HCA_CAP_Q_KEY_VIOL_CTR, "HCA_CAP_Q_KEY_VIOL_CTR" },
267 { HCA_CAP_WQE_RESIZE, "HCA_CAP_WQE_RESIZE" },
268 { HCA_CAP_RAW_PACKET_MCAST, "HCA_CAP_RAW_PACKET_MCAST" },
269 { HCA_CAP_SHUTDOWN_PORT, "HCA_CAP_SHUTDOWN_PORT" },
270 { HCA_CAP_RC_LL_QP, "HCA_CAP_RC_LL_QP" },
271 { HCA_CAP_SRQ, "HCA_CAP_SRQ" },
272 { HCA_CAP_UD_LL_QP, "HCA_CAP_UD_LL_QP" },
273 { HCA_CAP_RESIZE_MR, "HCA_CAP_RESIZE_MR" },
274 { HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" },
275 { HCA_CAP_H_ALLOC_RES_SYNC, "HCA_CAP_H_ALLOC_RES_SYNC" },
276 };
277
278 static int ehca_sense_attributes(struct ehca_shca *shca)
279 {
280 int i, ret = 0;
281 u64 h_ret;
282 struct hipz_query_hca *rblock;
283 struct hipz_query_port *port;
284 const char *loc_code;
285
286 static const u32 pgsize_map[] = {
287 HCA_CAP_MR_PGSIZE_4K, 0x1000,
288 HCA_CAP_MR_PGSIZE_64K, 0x10000,
289 HCA_CAP_MR_PGSIZE_1M, 0x100000,
290 HCA_CAP_MR_PGSIZE_16M, 0x1000000,
291 };
292
293 ehca_gen_dbg("Probing adapter %s...",
294 shca->ofdev->dev.of_node->full_name);
295 loc_code = of_get_property(shca->ofdev->dev.of_node, "ibm,loc-code",
296 NULL);
297 if (loc_code)
298 ehca_gen_dbg(" ... location lode=%s", loc_code);
299
300 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
301 if (!rblock) {
302 ehca_gen_err("Cannot allocate rblock memory.");
303 return -ENOMEM;
304 }
305
306 h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
307 if (h_ret != H_SUCCESS) {
308 ehca_gen_err("Cannot query device properties. h_ret=%lli",
309 h_ret);
310 ret = -EPERM;
311 goto sense_attributes1;
312 }
313
314 if (ehca_nr_ports == 1)
315 shca->num_ports = 1;
316 else
317 shca->num_ports = (u8)rblock->num_ports;
318
319 ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
320
321 if (ehca_hw_level == 0) {
322 u32 hcaaver;
323 u32 revid;
324
325 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
326 revid = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
327
328 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
329
330 if (hcaaver == 1) {
331 if (revid <= 3)
332 shca->hw_level = 0x10 | (revid + 1);
333 else
334 shca->hw_level = 0x14;
335 } else if (hcaaver == 2) {
336 if (revid == 0)
337 shca->hw_level = 0x21;
338 else if (revid == 0x10)
339 shca->hw_level = 0x22;
340 else if (revid == 0x20 || revid == 0x21)
341 shca->hw_level = 0x23;
342 }
343
344 if (!shca->hw_level) {
345 ehca_gen_warn("unknown hardware version"
346 " - assuming default level");
347 shca->hw_level = 0x22;
348 }
349 } else
350 shca->hw_level = ehca_hw_level;
351 ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
352
353 shca->hca_cap = rblock->hca_cap_indicators;
354 ehca_gen_dbg(" ... HCA capabilities:");
355 for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
356 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
357 ehca_gen_dbg(" %s", hca_cap_descr[i].descr);
358
359 /* Autodetect hCall locking -- the "H_ALLOC_RESOURCE synced" flag is
360 * a firmware property, so it's valid across all adapters
361 */
362 if (ehca_lock_hcalls == -1)
363 ehca_lock_hcalls = !(shca->hca_cap & HCA_CAP_H_ALLOC_RES_SYNC);
364
365 /* translate supported MR page sizes; always support 4K */
366 shca->hca_cap_mr_pgsize = EHCA_PAGESIZE;
367 for (i = 0; i < ARRAY_SIZE(pgsize_map); i += 2)
368 if (rblock->memory_page_size_supported & pgsize_map[i])
369 shca->hca_cap_mr_pgsize |= pgsize_map[i + 1];
370
371 /* Set maximum number of CQs and QPs to calculate EQ size */
372 if (shca->max_num_qps == -1)
373 shca->max_num_qps = min_t(int, rblock->max_qp,
374 EHCA_MAX_NUM_QUEUES);
375 else if (shca->max_num_qps < 1 || shca->max_num_qps > rblock->max_qp) {
376 ehca_gen_warn("The requested number of QPs is out of range "
377 "(1 - %i) specified by HW. Value is set to %i",
378 rblock->max_qp, rblock->max_qp);
379 shca->max_num_qps = rblock->max_qp;
380 }
381
382 if (shca->max_num_cqs == -1)
383 shca->max_num_cqs = min_t(int, rblock->max_cq,
384 EHCA_MAX_NUM_QUEUES);
385 else if (shca->max_num_cqs < 1 || shca->max_num_cqs > rblock->max_cq) {
386 ehca_gen_warn("The requested number of CQs is out of range "
387 "(1 - %i) specified by HW. Value is set to %i",
388 rblock->max_cq, rblock->max_cq);
389 }
390
391 /* query max MTU from first port -- it's the same for all ports */
392 port = (struct hipz_query_port *)rblock;
393 h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
394 if (h_ret != H_SUCCESS) {
395 ehca_gen_err("Cannot query port properties. h_ret=%lli",
396 h_ret);
397 ret = -EPERM;
398 goto sense_attributes1;
399 }
400
401 shca->max_mtu = port->max_mtu;
402
403 sense_attributes1:
404 ehca_free_fw_ctrlblock(rblock);
405 return ret;
406 }
407
408 static int init_node_guid(struct ehca_shca *shca)
409 {
410 int ret = 0;
411 struct hipz_query_hca *rblock;
412
413 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
414 if (!rblock) {
415 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
416 return -ENOMEM;
417 }
418
419 if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
420 ehca_err(&shca->ib_device, "Can't query device properties");
421 ret = -EINVAL;
422 goto init_node_guid1;
423 }
424
425 memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
426
427 init_node_guid1:
428 ehca_free_fw_ctrlblock(rblock);
429 return ret;
430 }
431
432 static int ehca_init_device(struct ehca_shca *shca)
433 {
434 int ret;
435
436 ret = init_node_guid(shca);
437 if (ret)
438 return ret;
439
440 strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
441 shca->ib_device.owner = THIS_MODULE;
442
443 shca->ib_device.uverbs_abi_ver = 8;
444 shca->ib_device.uverbs_cmd_mask =
445 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
446 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
447 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
448 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
449 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
450 (1ull << IB_USER_VERBS_CMD_REG_MR) |
451 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
452 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
453 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
454 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
455 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
456 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
457 (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
458 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
459 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) |
460 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
461
462 shca->ib_device.node_type = RDMA_NODE_IB_CA;
463 shca->ib_device.phys_port_cnt = shca->num_ports;
464 shca->ib_device.num_comp_vectors = 1;
465 shca->ib_device.dma_device = &shca->ofdev->dev;
466 shca->ib_device.query_device = ehca_query_device;
467 shca->ib_device.query_port = ehca_query_port;
468 shca->ib_device.query_gid = ehca_query_gid;
469 shca->ib_device.query_pkey = ehca_query_pkey;
470 /* shca->in_device.modify_device = ehca_modify_device */
471 shca->ib_device.modify_port = ehca_modify_port;
472 shca->ib_device.alloc_ucontext = ehca_alloc_ucontext;
473 shca->ib_device.dealloc_ucontext = ehca_dealloc_ucontext;
474 shca->ib_device.alloc_pd = ehca_alloc_pd;
475 shca->ib_device.dealloc_pd = ehca_dealloc_pd;
476 shca->ib_device.create_ah = ehca_create_ah;
477 /* shca->ib_device.modify_ah = ehca_modify_ah; */
478 shca->ib_device.query_ah = ehca_query_ah;
479 shca->ib_device.destroy_ah = ehca_destroy_ah;
480 shca->ib_device.create_qp = ehca_create_qp;
481 shca->ib_device.modify_qp = ehca_modify_qp;
482 shca->ib_device.query_qp = ehca_query_qp;
483 shca->ib_device.destroy_qp = ehca_destroy_qp;
484 shca->ib_device.post_send = ehca_post_send;
485 shca->ib_device.post_recv = ehca_post_recv;
486 shca->ib_device.create_cq = ehca_create_cq;
487 shca->ib_device.destroy_cq = ehca_destroy_cq;
488 shca->ib_device.resize_cq = ehca_resize_cq;
489 shca->ib_device.poll_cq = ehca_poll_cq;
490 /* shca->ib_device.peek_cq = ehca_peek_cq; */
491 shca->ib_device.req_notify_cq = ehca_req_notify_cq;
492 /* shca->ib_device.req_ncomp_notif = ehca_req_ncomp_notif; */
493 shca->ib_device.get_dma_mr = ehca_get_dma_mr;
494 shca->ib_device.reg_phys_mr = ehca_reg_phys_mr;
495 shca->ib_device.reg_user_mr = ehca_reg_user_mr;
496 shca->ib_device.query_mr = ehca_query_mr;
497 shca->ib_device.dereg_mr = ehca_dereg_mr;
498 shca->ib_device.rereg_phys_mr = ehca_rereg_phys_mr;
499 shca->ib_device.alloc_mw = ehca_alloc_mw;
500 shca->ib_device.bind_mw = ehca_bind_mw;
501 shca->ib_device.dealloc_mw = ehca_dealloc_mw;
502 shca->ib_device.alloc_fmr = ehca_alloc_fmr;
503 shca->ib_device.map_phys_fmr = ehca_map_phys_fmr;
504 shca->ib_device.unmap_fmr = ehca_unmap_fmr;
505 shca->ib_device.dealloc_fmr = ehca_dealloc_fmr;
506 shca->ib_device.attach_mcast = ehca_attach_mcast;
507 shca->ib_device.detach_mcast = ehca_detach_mcast;
508 shca->ib_device.process_mad = ehca_process_mad;
509 shca->ib_device.mmap = ehca_mmap;
510 shca->ib_device.dma_ops = &ehca_dma_mapping_ops;
511
512 if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
513 shca->ib_device.uverbs_cmd_mask |=
514 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
515 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
516 (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
517 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
518
519 shca->ib_device.create_srq = ehca_create_srq;
520 shca->ib_device.modify_srq = ehca_modify_srq;
521 shca->ib_device.query_srq = ehca_query_srq;
522 shca->ib_device.destroy_srq = ehca_destroy_srq;
523 shca->ib_device.post_srq_recv = ehca_post_srq_recv;
524 }
525
526 return ret;
527 }
528
529 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
530 {
531 struct ehca_sport *sport = &shca->sport[port - 1];
532 struct ib_cq *ibcq;
533 struct ib_qp *ibqp;
534 struct ib_qp_init_attr qp_init_attr;
535 int ret;
536
537 if (sport->ibcq_aqp1) {
538 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
539 return -EPERM;
540 }
541
542 ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void *)(-1), 10, 0);
543 if (IS_ERR(ibcq)) {
544 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
545 return PTR_ERR(ibcq);
546 }
547 sport->ibcq_aqp1 = ibcq;
548
549 if (sport->ibqp_sqp[IB_QPT_GSI]) {
550 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
551 ret = -EPERM;
552 goto create_aqp1;
553 }
554
555 memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
556 qp_init_attr.send_cq = ibcq;
557 qp_init_attr.recv_cq = ibcq;
558 qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
559 qp_init_attr.cap.max_send_wr = 100;
560 qp_init_attr.cap.max_recv_wr = 100;
561 qp_init_attr.cap.max_send_sge = 2;
562 qp_init_attr.cap.max_recv_sge = 1;
563 qp_init_attr.qp_type = IB_QPT_GSI;
564 qp_init_attr.port_num = port;
565 qp_init_attr.qp_context = NULL;
566 qp_init_attr.event_handler = NULL;
567 qp_init_attr.srq = NULL;
568
569 ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
570 if (IS_ERR(ibqp)) {
571 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
572 ret = PTR_ERR(ibqp);
573 goto create_aqp1;
574 }
575 sport->ibqp_sqp[IB_QPT_GSI] = ibqp;
576
577 return 0;
578
579 create_aqp1:
580 ib_destroy_cq(sport->ibcq_aqp1);
581 return ret;
582 }
583
584 static int ehca_destroy_aqp1(struct ehca_sport *sport)
585 {
586 int ret;
587
588 ret = ib_destroy_qp(sport->ibqp_sqp[IB_QPT_GSI]);
589 if (ret) {
590 ehca_gen_err("Cannot destroy AQP1 QP. ret=%i", ret);
591 return ret;
592 }
593
594 ret = ib_destroy_cq(sport->ibcq_aqp1);
595 if (ret)
596 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%i", ret);
597
598 return ret;
599 }
600
601 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
602 {
603 return snprintf(buf, PAGE_SIZE, "%d\n", ehca_debug_level);
604 }
605
606 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
607 const char *buf, size_t count)
608 {
609 int value = (*buf) - '0';
610 if (value >= 0 && value <= 9)
611 ehca_debug_level = value;
612 return 1;
613 }
614
615 static DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
616 ehca_show_debug_level, ehca_store_debug_level);
617
618 static struct attribute *ehca_drv_attrs[] = {
619 &driver_attr_debug_level.attr,
620 NULL
621 };
622
623 static struct attribute_group ehca_drv_attr_grp = {
624 .attrs = ehca_drv_attrs
625 };
626
627 static const struct attribute_group *ehca_drv_attr_groups[] = {
628 &ehca_drv_attr_grp,
629 NULL,
630 };
631
632 #define EHCA_RESOURCE_ATTR(name) \
633 static ssize_t ehca_show_##name(struct device *dev, \
634 struct device_attribute *attr, \
635 char *buf) \
636 { \
637 struct ehca_shca *shca; \
638 struct hipz_query_hca *rblock; \
639 int data; \
640 \
641 shca = dev_get_drvdata(dev); \
642 \
643 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL); \
644 if (!rblock) { \
645 dev_err(dev, "Can't allocate rblock memory.\n"); \
646 return 0; \
647 } \
648 \
649 if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
650 dev_err(dev, "Can't query device properties\n"); \
651 ehca_free_fw_ctrlblock(rblock); \
652 return 0; \
653 } \
654 \
655 data = rblock->name; \
656 ehca_free_fw_ctrlblock(rblock); \
657 \
658 if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1)) \
659 return snprintf(buf, 256, "1\n"); \
660 else \
661 return snprintf(buf, 256, "%d\n", data); \
662 \
663 } \
664 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
665
666 EHCA_RESOURCE_ATTR(num_ports);
667 EHCA_RESOURCE_ATTR(hw_ver);
668 EHCA_RESOURCE_ATTR(max_eq);
669 EHCA_RESOURCE_ATTR(cur_eq);
670 EHCA_RESOURCE_ATTR(max_cq);
671 EHCA_RESOURCE_ATTR(cur_cq);
672 EHCA_RESOURCE_ATTR(max_qp);
673 EHCA_RESOURCE_ATTR(cur_qp);
674 EHCA_RESOURCE_ATTR(max_mr);
675 EHCA_RESOURCE_ATTR(cur_mr);
676 EHCA_RESOURCE_ATTR(max_mw);
677 EHCA_RESOURCE_ATTR(cur_mw);
678 EHCA_RESOURCE_ATTR(max_pd);
679 EHCA_RESOURCE_ATTR(max_ah);
680
681 static ssize_t ehca_show_adapter_handle(struct device *dev,
682 struct device_attribute *attr,
683 char *buf)
684 {
685 struct ehca_shca *shca = dev_get_drvdata(dev);
686
687 return sprintf(buf, "%llx\n", shca->ipz_hca_handle.handle);
688
689 }
690 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
691
692 static struct attribute *ehca_dev_attrs[] = {
693 &dev_attr_adapter_handle.attr,
694 &dev_attr_num_ports.attr,
695 &dev_attr_hw_ver.attr,
696 &dev_attr_max_eq.attr,
697 &dev_attr_cur_eq.attr,
698 &dev_attr_max_cq.attr,
699 &dev_attr_cur_cq.attr,
700 &dev_attr_max_qp.attr,
701 &dev_attr_cur_qp.attr,
702 &dev_attr_max_mr.attr,
703 &dev_attr_cur_mr.attr,
704 &dev_attr_max_mw.attr,
705 &dev_attr_cur_mw.attr,
706 &dev_attr_max_pd.attr,
707 &dev_attr_max_ah.attr,
708 NULL
709 };
710
711 static struct attribute_group ehca_dev_attr_grp = {
712 .attrs = ehca_dev_attrs
713 };
714
715 static int __devinit ehca_probe(struct of_device *dev,
716 const struct of_device_id *id)
717 {
718 struct ehca_shca *shca;
719 const u64 *handle;
720 struct ib_pd *ibpd;
721 int ret, i, eq_size;
722 unsigned long flags;
723
724 handle = of_get_property(dev->dev.of_node, "ibm,hca-handle", NULL);
725 if (!handle) {
726 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
727 dev->dev.of_node->full_name);
728 return -ENODEV;
729 }
730
731 if (!(*handle)) {
732 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
733 dev->dev.of_node->full_name);
734 return -ENODEV;
735 }
736
737 shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
738 if (!shca) {
739 ehca_gen_err("Cannot allocate shca memory.");
740 return -ENOMEM;
741 }
742
743 mutex_init(&shca->modify_mutex);
744 atomic_set(&shca->num_cqs, 0);
745 atomic_set(&shca->num_qps, 0);
746 shca->max_num_qps = ehca_max_qp;
747 shca->max_num_cqs = ehca_max_cq;
748
749 for (i = 0; i < ARRAY_SIZE(shca->sport); i++)
750 spin_lock_init(&shca->sport[i].mod_sqp_lock);
751
752 shca->ofdev = dev;
753 shca->ipz_hca_handle.handle = *handle;
754 dev_set_drvdata(&dev->dev, shca);
755
756 ret = ehca_sense_attributes(shca);
757 if (ret < 0) {
758 ehca_gen_err("Cannot sense eHCA attributes.");
759 goto probe1;
760 }
761
762 ret = ehca_init_device(shca);
763 if (ret) {
764 ehca_gen_err("Cannot init ehca device struct");
765 goto probe1;
766 }
767
768 eq_size = 2 * shca->max_num_cqs + 4 * shca->max_num_qps;
769 /* create event queues */
770 ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, eq_size);
771 if (ret) {
772 ehca_err(&shca->ib_device, "Cannot create EQ.");
773 goto probe1;
774 }
775
776 ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
777 if (ret) {
778 ehca_err(&shca->ib_device, "Cannot create NEQ.");
779 goto probe3;
780 }
781
782 /* create internal protection domain */
783 ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL);
784 if (IS_ERR(ibpd)) {
785 ehca_err(&shca->ib_device, "Cannot create internal PD.");
786 ret = PTR_ERR(ibpd);
787 goto probe4;
788 }
789
790 shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
791 shca->pd->ib_pd.device = &shca->ib_device;
792
793 /* create internal max MR */
794 ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
795
796 if (ret) {
797 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%i",
798 ret);
799 goto probe5;
800 }
801
802 ret = ib_register_device(&shca->ib_device);
803 if (ret) {
804 ehca_err(&shca->ib_device,
805 "ib_register_device() failed ret=%i", ret);
806 goto probe6;
807 }
808
809 /* create AQP1 for port 1 */
810 if (ehca_open_aqp1 == 1) {
811 shca->sport[0].port_state = IB_PORT_DOWN;
812 ret = ehca_create_aqp1(shca, 1);
813 if (ret) {
814 ehca_err(&shca->ib_device,
815 "Cannot create AQP1 for port 1.");
816 goto probe7;
817 }
818 }
819
820 /* create AQP1 for port 2 */
821 if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
822 shca->sport[1].port_state = IB_PORT_DOWN;
823 ret = ehca_create_aqp1(shca, 2);
824 if (ret) {
825 ehca_err(&shca->ib_device,
826 "Cannot create AQP1 for port 2.");
827 goto probe8;
828 }
829 }
830
831 ret = sysfs_create_group(&dev->dev.kobj, &ehca_dev_attr_grp);
832 if (ret) /* only complain; we can live without attributes */
833 ehca_err(&shca->ib_device,
834 "Cannot create device attributes ret=%d", ret);
835
836 spin_lock_irqsave(&shca_list_lock, flags);
837 list_add(&shca->shca_list, &shca_list);
838 spin_unlock_irqrestore(&shca_list_lock, flags);
839
840 return 0;
841
842 probe8:
843 ret = ehca_destroy_aqp1(&shca->sport[0]);
844 if (ret)
845 ehca_err(&shca->ib_device,
846 "Cannot destroy AQP1 for port 1. ret=%i", ret);
847
848 probe7:
849 ib_unregister_device(&shca->ib_device);
850
851 probe6:
852 ret = ehca_dereg_internal_maxmr(shca);
853 if (ret)
854 ehca_err(&shca->ib_device,
855 "Cannot destroy internal MR. ret=%x", ret);
856
857 probe5:
858 ret = ehca_dealloc_pd(&shca->pd->ib_pd);
859 if (ret)
860 ehca_err(&shca->ib_device,
861 "Cannot destroy internal PD. ret=%x", ret);
862
863 probe4:
864 ret = ehca_destroy_eq(shca, &shca->neq);
865 if (ret)
866 ehca_err(&shca->ib_device,
867 "Cannot destroy NEQ. ret=%x", ret);
868
869 probe3:
870 ret = ehca_destroy_eq(shca, &shca->eq);
871 if (ret)
872 ehca_err(&shca->ib_device,
873 "Cannot destroy EQ. ret=%x", ret);
874
875 probe1:
876 ib_dealloc_device(&shca->ib_device);
877
878 return -EINVAL;
879 }
880
881 static int __devexit ehca_remove(struct of_device *dev)
882 {
883 struct ehca_shca *shca = dev_get_drvdata(&dev->dev);
884 unsigned long flags;
885 int ret;
886
887 sysfs_remove_group(&dev->dev.kobj, &ehca_dev_attr_grp);
888
889 if (ehca_open_aqp1 == 1) {
890 int i;
891 for (i = 0; i < shca->num_ports; i++) {
892 ret = ehca_destroy_aqp1(&shca->sport[i]);
893 if (ret)
894 ehca_err(&shca->ib_device,
895 "Cannot destroy AQP1 for port %x "
896 "ret=%i", ret, i);
897 }
898 }
899
900 ib_unregister_device(&shca->ib_device);
901
902 ret = ehca_dereg_internal_maxmr(shca);
903 if (ret)
904 ehca_err(&shca->ib_device,
905 "Cannot destroy internal MR. ret=%i", ret);
906
907 ret = ehca_dealloc_pd(&shca->pd->ib_pd);
908 if (ret)
909 ehca_err(&shca->ib_device,
910 "Cannot destroy internal PD. ret=%i", ret);
911
912 ret = ehca_destroy_eq(shca, &shca->eq);
913 if (ret)
914 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%i", ret);
915
916 ret = ehca_destroy_eq(shca, &shca->neq);
917 if (ret)
918 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%i", ret);
919
920 ib_dealloc_device(&shca->ib_device);
921
922 spin_lock_irqsave(&shca_list_lock, flags);
923 list_del(&shca->shca_list);
924 spin_unlock_irqrestore(&shca_list_lock, flags);
925
926 return ret;
927 }
928
929 static struct of_device_id ehca_device_table[] =
930 {
931 {
932 .name = "lhca",
933 .compatible = "IBM,lhca",
934 },
935 {},
936 };
937 MODULE_DEVICE_TABLE(of, ehca_device_table);
938
939 static struct of_platform_driver ehca_driver = {
940 .name = "ehca",
941 .match_table = ehca_device_table,
942 .probe = ehca_probe,
943 .remove = ehca_remove,
944 .driver = {
945 .groups = ehca_drv_attr_groups,
946 },
947 };
948
949 void ehca_poll_eqs(unsigned long data)
950 {
951 struct ehca_shca *shca;
952
953 spin_lock(&shca_list_lock);
954 list_for_each_entry(shca, &shca_list, shca_list) {
955 if (shca->eq.is_initialized) {
956 /* call deadman proc only if eq ptr does not change */
957 struct ehca_eq *eq = &shca->eq;
958 int max = 3;
959 volatile u64 q_ofs, q_ofs2;
960 unsigned long flags;
961 spin_lock_irqsave(&eq->spinlock, flags);
962 q_ofs = eq->ipz_queue.current_q_offset;
963 spin_unlock_irqrestore(&eq->spinlock, flags);
964 do {
965 spin_lock_irqsave(&eq->spinlock, flags);
966 q_ofs2 = eq->ipz_queue.current_q_offset;
967 spin_unlock_irqrestore(&eq->spinlock, flags);
968 max--;
969 } while (q_ofs == q_ofs2 && max > 0);
970 if (q_ofs == q_ofs2)
971 ehca_process_eq(shca, 0);
972 }
973 }
974 mod_timer(&poll_eqs_timer, round_jiffies(jiffies + HZ));
975 spin_unlock(&shca_list_lock);
976 }
977
978 static int ehca_mem_notifier(struct notifier_block *nb,
979 unsigned long action, void *data)
980 {
981 static unsigned long ehca_dmem_warn_time;
982 unsigned long flags;
983
984 switch (action) {
985 case MEM_CANCEL_OFFLINE:
986 case MEM_CANCEL_ONLINE:
987 case MEM_ONLINE:
988 case MEM_OFFLINE:
989 return NOTIFY_OK;
990 case MEM_GOING_ONLINE:
991 case MEM_GOING_OFFLINE:
992 /* only ok if no hca is attached to the lpar */
993 spin_lock_irqsave(&shca_list_lock, flags);
994 if (list_empty(&shca_list)) {
995 spin_unlock_irqrestore(&shca_list_lock, flags);
996 return NOTIFY_OK;
997 } else {
998 spin_unlock_irqrestore(&shca_list_lock, flags);
999 if (printk_timed_ratelimit(&ehca_dmem_warn_time,
1000 30 * 1000))
1001 ehca_gen_err("DMEM operations are not allowed"
1002 "in conjunction with eHCA");
1003 return NOTIFY_BAD;
1004 }
1005 }
1006 return NOTIFY_OK;
1007 }
1008
1009 static struct notifier_block ehca_mem_nb = {
1010 .notifier_call = ehca_mem_notifier,
1011 };
1012
1013 static int __init ehca_module_init(void)
1014 {
1015 int ret;
1016
1017 printk(KERN_INFO "eHCA Infiniband Device Driver "
1018 "(Version " HCAD_VERSION ")\n");
1019
1020 ret = ehca_create_comp_pool();
1021 if (ret) {
1022 ehca_gen_err("Cannot create comp pool.");
1023 return ret;
1024 }
1025
1026 ret = ehca_create_slab_caches();
1027 if (ret) {
1028 ehca_gen_err("Cannot create SLAB caches");
1029 ret = -ENOMEM;
1030 goto module_init1;
1031 }
1032
1033 ret = ehca_create_busmap();
1034 if (ret) {
1035 ehca_gen_err("Cannot create busmap.");
1036 goto module_init2;
1037 }
1038
1039 ret = ibmebus_register_driver(&ehca_driver);
1040 if (ret) {
1041 ehca_gen_err("Cannot register eHCA device driver");
1042 ret = -EINVAL;
1043 goto module_init3;
1044 }
1045
1046 ret = register_memory_notifier(&ehca_mem_nb);
1047 if (ret) {
1048 ehca_gen_err("Failed registering memory add/remove notifier");
1049 goto module_init4;
1050 }
1051
1052 if (ehca_poll_all_eqs != 1) {
1053 ehca_gen_err("WARNING!!!");
1054 ehca_gen_err("It is possible to lose interrupts.");
1055 } else {
1056 init_timer(&poll_eqs_timer);
1057 poll_eqs_timer.function = ehca_poll_eqs;
1058 poll_eqs_timer.expires = jiffies + HZ;
1059 add_timer(&poll_eqs_timer);
1060 }
1061
1062 return 0;
1063
1064 module_init4:
1065 ibmebus_unregister_driver(&ehca_driver);
1066
1067 module_init3:
1068 ehca_destroy_busmap();
1069
1070 module_init2:
1071 ehca_destroy_slab_caches();
1072
1073 module_init1:
1074 ehca_destroy_comp_pool();
1075 return ret;
1076 };
1077
1078 static void __exit ehca_module_exit(void)
1079 {
1080 if (ehca_poll_all_eqs == 1)
1081 del_timer_sync(&poll_eqs_timer);
1082
1083 ibmebus_unregister_driver(&ehca_driver);
1084
1085 unregister_memory_notifier(&ehca_mem_nb);
1086
1087 ehca_destroy_busmap();
1088
1089 ehca_destroy_slab_caches();
1090
1091 ehca_destroy_comp_pool();
1092
1093 idr_destroy(&ehca_cq_idr);
1094 idr_destroy(&ehca_qp_idr);
1095 };
1096
1097 module_init(ehca_module_init);
1098 module_exit(ehca_module_exit);
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