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 "0026"
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 = 2;
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, 1: port one only, "
99 "2: two ports (default)");
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 static 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
ehca_alloc_fw_ctrlblock(gfp_t flags)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
ehca_free_fw_ctrlblock(void * ptr)141 void ehca_free_fw_ctrlblock(void *ptr)
142 {
143 if (ptr)
144 kmem_cache_free(ctblk_cache, ptr);
145
146 }
147 #endif
148
ehca2ib_return_code(u64 ehca_rc)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
ehca_create_slab_caches(void)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
ehca_destroy_slab_caches(void)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
ehca_sense_attributes(struct ehca_shca * shca)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->node->full_name);
295 loc_code = of_get_property(shca->ofdev->node, "ibm,loc-code", NULL);
296 if (loc_code)
297 ehca_gen_dbg(" ... location lode=%s", loc_code);
298
299 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
300 if (!rblock) {
301 ehca_gen_err("Cannot allocate rblock memory.");
302 return -ENOMEM;
303 }
304
305 h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
306 if (h_ret != H_SUCCESS) {
307 ehca_gen_err("Cannot query device properties. h_ret=%lli",
308 h_ret);
309 ret = -EPERM;
310 goto sense_attributes1;
311 }
312
313 if (ehca_nr_ports == 1)
314 shca->num_ports = 1;
315 else
316 shca->num_ports = (u8)rblock->num_ports;
317
318 ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
319
320 if (ehca_hw_level == 0) {
321 u32 hcaaver;
322 u32 revid;
323
324 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
325 revid = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
326
327 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
328
329 if (hcaaver == 1) {
330 if (revid <= 3)
331 shca->hw_level = 0x10 | (revid + 1);
332 else
333 shca->hw_level = 0x14;
334 } else if (hcaaver == 2) {
335 if (revid == 0)
336 shca->hw_level = 0x21;
337 else if (revid == 0x10)
338 shca->hw_level = 0x22;
339 else if (revid == 0x20 || revid == 0x21)
340 shca->hw_level = 0x23;
341 }
342
343 if (!shca->hw_level) {
344 ehca_gen_warn("unknown hardware version"
345 " - assuming default level");
346 shca->hw_level = 0x22;
347 }
348 } else
349 shca->hw_level = ehca_hw_level;
350 ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
351
352 shca->hca_cap = rblock->hca_cap_indicators;
353 ehca_gen_dbg(" ... HCA capabilities:");
354 for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
355 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
356 ehca_gen_dbg(" %s", hca_cap_descr[i].descr);
357
358 /* Autodetect hCall locking -- the "H_ALLOC_RESOURCE synced" flag is
359 * a firmware property, so it's valid across all adapters
360 */
361 if (ehca_lock_hcalls == -1)
362 ehca_lock_hcalls = !(shca->hca_cap & HCA_CAP_H_ALLOC_RES_SYNC);
363
364 /* translate supported MR page sizes; always support 4K */
365 shca->hca_cap_mr_pgsize = EHCA_PAGESIZE;
366 for (i = 0; i < ARRAY_SIZE(pgsize_map); i += 2)
367 if (rblock->memory_page_size_supported & pgsize_map[i])
368 shca->hca_cap_mr_pgsize |= pgsize_map[i + 1];
369
370 /* Set maximum number of CQs and QPs to calculate EQ size */
371 if (shca->max_num_qps == -1)
372 shca->max_num_qps = min_t(int, rblock->max_qp,
373 EHCA_MAX_NUM_QUEUES);
374 else if (shca->max_num_qps < 1 || shca->max_num_qps > rblock->max_qp) {
375 ehca_gen_warn("The requested number of QPs is out of range "
376 "(1 - %i) specified by HW. Value is set to %i",
377 rblock->max_qp, rblock->max_qp);
378 shca->max_num_qps = rblock->max_qp;
379 }
380
381 if (shca->max_num_cqs == -1)
382 shca->max_num_cqs = min_t(int, rblock->max_cq,
383 EHCA_MAX_NUM_QUEUES);
384 else if (shca->max_num_cqs < 1 || shca->max_num_cqs > rblock->max_cq) {
385 ehca_gen_warn("The requested number of CQs is out of range "
386 "(1 - %i) specified by HW. Value is set to %i",
387 rblock->max_cq, rblock->max_cq);
388 }
389
390 /* query max MTU from first port -- it's the same for all ports */
391 port = (struct hipz_query_port *)rblock;
392 h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
393 if (h_ret != H_SUCCESS) {
394 ehca_gen_err("Cannot query port properties. h_ret=%lli",
395 h_ret);
396 ret = -EPERM;
397 goto sense_attributes1;
398 }
399
400 shca->max_mtu = port->max_mtu;
401
402 sense_attributes1:
403 ehca_free_fw_ctrlblock(rblock);
404 return ret;
405 }
406
init_node_guid(struct ehca_shca * shca)407 static int init_node_guid(struct ehca_shca *shca)
408 {
409 int ret = 0;
410 struct hipz_query_hca *rblock;
411
412 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
413 if (!rblock) {
414 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
415 return -ENOMEM;
416 }
417
418 if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
419 ehca_err(&shca->ib_device, "Can't query device properties");
420 ret = -EINVAL;
421 goto init_node_guid1;
422 }
423
424 memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
425
426 init_node_guid1:
427 ehca_free_fw_ctrlblock(rblock);
428 return ret;
429 }
430
ehca_init_device(struct ehca_shca * shca)431 static int ehca_init_device(struct ehca_shca *shca)
432 {
433 int ret;
434
435 ret = init_node_guid(shca);
436 if (ret)
437 return ret;
438
439 strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
440 shca->ib_device.owner = THIS_MODULE;
441
442 shca->ib_device.uverbs_abi_ver = 8;
443 shca->ib_device.uverbs_cmd_mask =
444 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
445 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
446 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
447 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
448 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
449 (1ull << IB_USER_VERBS_CMD_REG_MR) |
450 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
451 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
452 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
453 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
454 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
455 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
456 (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
457 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
458 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) |
459 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
460
461 shca->ib_device.node_type = RDMA_NODE_IB_CA;
462 shca->ib_device.phys_port_cnt = shca->num_ports;
463 shca->ib_device.num_comp_vectors = 1;
464 shca->ib_device.dma_device = &shca->ofdev->dev;
465 shca->ib_device.query_device = ehca_query_device;
466 shca->ib_device.query_port = ehca_query_port;
467 shca->ib_device.query_gid = ehca_query_gid;
468 shca->ib_device.query_pkey = ehca_query_pkey;
469 /* shca->in_device.modify_device = ehca_modify_device */
470 shca->ib_device.modify_port = ehca_modify_port;
471 shca->ib_device.alloc_ucontext = ehca_alloc_ucontext;
472 shca->ib_device.dealloc_ucontext = ehca_dealloc_ucontext;
473 shca->ib_device.alloc_pd = ehca_alloc_pd;
474 shca->ib_device.dealloc_pd = ehca_dealloc_pd;
475 shca->ib_device.create_ah = ehca_create_ah;
476 /* shca->ib_device.modify_ah = ehca_modify_ah; */
477 shca->ib_device.query_ah = ehca_query_ah;
478 shca->ib_device.destroy_ah = ehca_destroy_ah;
479 shca->ib_device.create_qp = ehca_create_qp;
480 shca->ib_device.modify_qp = ehca_modify_qp;
481 shca->ib_device.query_qp = ehca_query_qp;
482 shca->ib_device.destroy_qp = ehca_destroy_qp;
483 shca->ib_device.post_send = ehca_post_send;
484 shca->ib_device.post_recv = ehca_post_recv;
485 shca->ib_device.create_cq = ehca_create_cq;
486 shca->ib_device.destroy_cq = ehca_destroy_cq;
487 shca->ib_device.resize_cq = ehca_resize_cq;
488 shca->ib_device.poll_cq = ehca_poll_cq;
489 /* shca->ib_device.peek_cq = ehca_peek_cq; */
490 shca->ib_device.req_notify_cq = ehca_req_notify_cq;
491 /* shca->ib_device.req_ncomp_notif = ehca_req_ncomp_notif; */
492 shca->ib_device.get_dma_mr = ehca_get_dma_mr;
493 shca->ib_device.reg_phys_mr = ehca_reg_phys_mr;
494 shca->ib_device.reg_user_mr = ehca_reg_user_mr;
495 shca->ib_device.query_mr = ehca_query_mr;
496 shca->ib_device.dereg_mr = ehca_dereg_mr;
497 shca->ib_device.rereg_phys_mr = ehca_rereg_phys_mr;
498 shca->ib_device.alloc_mw = ehca_alloc_mw;
499 shca->ib_device.bind_mw = ehca_bind_mw;
500 shca->ib_device.dealloc_mw = ehca_dealloc_mw;
501 shca->ib_device.alloc_fmr = ehca_alloc_fmr;
502 shca->ib_device.map_phys_fmr = ehca_map_phys_fmr;
503 shca->ib_device.unmap_fmr = ehca_unmap_fmr;
504 shca->ib_device.dealloc_fmr = ehca_dealloc_fmr;
505 shca->ib_device.attach_mcast = ehca_attach_mcast;
506 shca->ib_device.detach_mcast = ehca_detach_mcast;
507 shca->ib_device.process_mad = ehca_process_mad;
508 shca->ib_device.mmap = ehca_mmap;
509
510 if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
511 shca->ib_device.uverbs_cmd_mask |=
512 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
513 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
514 (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
515 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
516
517 shca->ib_device.create_srq = ehca_create_srq;
518 shca->ib_device.modify_srq = ehca_modify_srq;
519 shca->ib_device.query_srq = ehca_query_srq;
520 shca->ib_device.destroy_srq = ehca_destroy_srq;
521 shca->ib_device.post_srq_recv = ehca_post_srq_recv;
522 }
523
524 return ret;
525 }
526
ehca_create_aqp1(struct ehca_shca * shca,u32 port)527 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
528 {
529 struct ehca_sport *sport = &shca->sport[port - 1];
530 struct ib_cq *ibcq;
531 struct ib_qp *ibqp;
532 struct ib_qp_init_attr qp_init_attr;
533 int ret;
534
535 if (sport->ibcq_aqp1) {
536 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
537 return -EPERM;
538 }
539
540 ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void *)(-1), 10, 0);
541 if (IS_ERR(ibcq)) {
542 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
543 return PTR_ERR(ibcq);
544 }
545 sport->ibcq_aqp1 = ibcq;
546
547 if (sport->ibqp_sqp[IB_QPT_GSI]) {
548 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
549 ret = -EPERM;
550 goto create_aqp1;
551 }
552
553 memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
554 qp_init_attr.send_cq = ibcq;
555 qp_init_attr.recv_cq = ibcq;
556 qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
557 qp_init_attr.cap.max_send_wr = 100;
558 qp_init_attr.cap.max_recv_wr = 100;
559 qp_init_attr.cap.max_send_sge = 2;
560 qp_init_attr.cap.max_recv_sge = 1;
561 qp_init_attr.qp_type = IB_QPT_GSI;
562 qp_init_attr.port_num = port;
563 qp_init_attr.qp_context = NULL;
564 qp_init_attr.event_handler = NULL;
565 qp_init_attr.srq = NULL;
566
567 ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
568 if (IS_ERR(ibqp)) {
569 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
570 ret = PTR_ERR(ibqp);
571 goto create_aqp1;
572 }
573 sport->ibqp_sqp[IB_QPT_GSI] = ibqp;
574
575 return 0;
576
577 create_aqp1:
578 ib_destroy_cq(sport->ibcq_aqp1);
579 return ret;
580 }
581
ehca_destroy_aqp1(struct ehca_sport * sport)582 static int ehca_destroy_aqp1(struct ehca_sport *sport)
583 {
584 int ret;
585
586 ret = ib_destroy_qp(sport->ibqp_sqp[IB_QPT_GSI]);
587 if (ret) {
588 ehca_gen_err("Cannot destroy AQP1 QP. ret=%i", ret);
589 return ret;
590 }
591
592 ret = ib_destroy_cq(sport->ibcq_aqp1);
593 if (ret)
594 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%i", ret);
595
596 return ret;
597 }
598
ehca_show_debug_level(struct device_driver * ddp,char * buf)599 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
600 {
601 return snprintf(buf, PAGE_SIZE, "%d\n", ehca_debug_level);
602 }
603
ehca_store_debug_level(struct device_driver * ddp,const char * buf,size_t count)604 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
605 const char *buf, size_t count)
606 {
607 int value = (*buf) - '0';
608 if (value >= 0 && value <= 9)
609 ehca_debug_level = value;
610 return 1;
611 }
612
613 static DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
614 ehca_show_debug_level, ehca_store_debug_level);
615
616 static struct attribute *ehca_drv_attrs[] = {
617 &driver_attr_debug_level.attr,
618 NULL
619 };
620
621 static struct attribute_group ehca_drv_attr_grp = {
622 .attrs = ehca_drv_attrs
623 };
624
625 static struct attribute_group *ehca_drv_attr_groups[] = {
626 &ehca_drv_attr_grp,
627 NULL,
628 };
629
630 #define EHCA_RESOURCE_ATTR(name) \
631 static ssize_t ehca_show_##name(struct device *dev, \
632 struct device_attribute *attr, \
633 char *buf) \
634 { \
635 struct ehca_shca *shca; \
636 struct hipz_query_hca *rblock; \
637 int data; \
638 \
639 shca = dev->driver_data; \
640 \
641 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL); \
642 if (!rblock) { \
643 dev_err(dev, "Can't allocate rblock memory.\n"); \
644 return 0; \
645 } \
646 \
647 if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
648 dev_err(dev, "Can't query device properties\n"); \
649 ehca_free_fw_ctrlblock(rblock); \
650 return 0; \
651 } \
652 \
653 data = rblock->name; \
654 ehca_free_fw_ctrlblock(rblock); \
655 \
656 if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1)) \
657 return snprintf(buf, 256, "1\n"); \
658 else \
659 return snprintf(buf, 256, "%d\n", data); \
660 \
661 } \
662 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
663
664 EHCA_RESOURCE_ATTR(num_ports);
665 EHCA_RESOURCE_ATTR(hw_ver);
666 EHCA_RESOURCE_ATTR(max_eq);
667 EHCA_RESOURCE_ATTR(cur_eq);
668 EHCA_RESOURCE_ATTR(max_cq);
669 EHCA_RESOURCE_ATTR(cur_cq);
670 EHCA_RESOURCE_ATTR(max_qp);
671 EHCA_RESOURCE_ATTR(cur_qp);
672 EHCA_RESOURCE_ATTR(max_mr);
673 EHCA_RESOURCE_ATTR(cur_mr);
674 EHCA_RESOURCE_ATTR(max_mw);
675 EHCA_RESOURCE_ATTR(cur_mw);
676 EHCA_RESOURCE_ATTR(max_pd);
677 EHCA_RESOURCE_ATTR(max_ah);
678
ehca_show_adapter_handle(struct device * dev,struct device_attribute * attr,char * buf)679 static ssize_t ehca_show_adapter_handle(struct device *dev,
680 struct device_attribute *attr,
681 char *buf)
682 {
683 struct ehca_shca *shca = dev->driver_data;
684
685 return sprintf(buf, "%llx\n", shca->ipz_hca_handle.handle);
686
687 }
688 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
689
690 static struct attribute *ehca_dev_attrs[] = {
691 &dev_attr_adapter_handle.attr,
692 &dev_attr_num_ports.attr,
693 &dev_attr_hw_ver.attr,
694 &dev_attr_max_eq.attr,
695 &dev_attr_cur_eq.attr,
696 &dev_attr_max_cq.attr,
697 &dev_attr_cur_cq.attr,
698 &dev_attr_max_qp.attr,
699 &dev_attr_cur_qp.attr,
700 &dev_attr_max_mr.attr,
701 &dev_attr_cur_mr.attr,
702 &dev_attr_max_mw.attr,
703 &dev_attr_cur_mw.attr,
704 &dev_attr_max_pd.attr,
705 &dev_attr_max_ah.attr,
706 NULL
707 };
708
709 static struct attribute_group ehca_dev_attr_grp = {
710 .attrs = ehca_dev_attrs
711 };
712
ehca_probe(struct of_device * dev,const struct of_device_id * id)713 static int __devinit ehca_probe(struct of_device *dev,
714 const struct of_device_id *id)
715 {
716 struct ehca_shca *shca;
717 const u64 *handle;
718 struct ib_pd *ibpd;
719 int ret, i, eq_size;
720 unsigned long flags;
721
722 handle = of_get_property(dev->node, "ibm,hca-handle", NULL);
723 if (!handle) {
724 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
725 dev->node->full_name);
726 return -ENODEV;
727 }
728
729 if (!(*handle)) {
730 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
731 dev->node->full_name);
732 return -ENODEV;
733 }
734
735 shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
736 if (!shca) {
737 ehca_gen_err("Cannot allocate shca memory.");
738 return -ENOMEM;
739 }
740
741 mutex_init(&shca->modify_mutex);
742 atomic_set(&shca->num_cqs, 0);
743 atomic_set(&shca->num_qps, 0);
744 shca->max_num_qps = ehca_max_qp;
745 shca->max_num_cqs = ehca_max_cq;
746
747 for (i = 0; i < ARRAY_SIZE(shca->sport); i++)
748 spin_lock_init(&shca->sport[i].mod_sqp_lock);
749
750 shca->ofdev = dev;
751 shca->ipz_hca_handle.handle = *handle;
752 dev->dev.driver_data = shca;
753
754 ret = ehca_sense_attributes(shca);
755 if (ret < 0) {
756 ehca_gen_err("Cannot sense eHCA attributes.");
757 goto probe1;
758 }
759
760 ret = ehca_init_device(shca);
761 if (ret) {
762 ehca_gen_err("Cannot init ehca device struct");
763 goto probe1;
764 }
765
766 eq_size = 2 * shca->max_num_cqs + 4 * shca->max_num_qps;
767 /* create event queues */
768 ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, eq_size);
769 if (ret) {
770 ehca_err(&shca->ib_device, "Cannot create EQ.");
771 goto probe1;
772 }
773
774 ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
775 if (ret) {
776 ehca_err(&shca->ib_device, "Cannot create NEQ.");
777 goto probe3;
778 }
779
780 /* create internal protection domain */
781 ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL);
782 if (IS_ERR(ibpd)) {
783 ehca_err(&shca->ib_device, "Cannot create internal PD.");
784 ret = PTR_ERR(ibpd);
785 goto probe4;
786 }
787
788 shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
789 shca->pd->ib_pd.device = &shca->ib_device;
790
791 /* create internal max MR */
792 ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
793
794 if (ret) {
795 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%i",
796 ret);
797 goto probe5;
798 }
799
800 ret = ib_register_device(&shca->ib_device);
801 if (ret) {
802 ehca_err(&shca->ib_device,
803 "ib_register_device() failed ret=%i", ret);
804 goto probe6;
805 }
806
807 /* create AQP1 for port 1 */
808 if (ehca_open_aqp1 == 1) {
809 shca->sport[0].port_state = IB_PORT_DOWN;
810 ret = ehca_create_aqp1(shca, 1);
811 if (ret) {
812 ehca_err(&shca->ib_device,
813 "Cannot create AQP1 for port 1.");
814 goto probe7;
815 }
816 }
817
818 /* create AQP1 for port 2 */
819 if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
820 shca->sport[1].port_state = IB_PORT_DOWN;
821 ret = ehca_create_aqp1(shca, 2);
822 if (ret) {
823 ehca_err(&shca->ib_device,
824 "Cannot create AQP1 for port 2.");
825 goto probe8;
826 }
827 }
828
829 ret = sysfs_create_group(&dev->dev.kobj, &ehca_dev_attr_grp);
830 if (ret) /* only complain; we can live without attributes */
831 ehca_err(&shca->ib_device,
832 "Cannot create device attributes ret=%d", ret);
833
834 spin_lock_irqsave(&shca_list_lock, flags);
835 list_add(&shca->shca_list, &shca_list);
836 spin_unlock_irqrestore(&shca_list_lock, flags);
837
838 return 0;
839
840 probe8:
841 ret = ehca_destroy_aqp1(&shca->sport[0]);
842 if (ret)
843 ehca_err(&shca->ib_device,
844 "Cannot destroy AQP1 for port 1. ret=%i", ret);
845
846 probe7:
847 ib_unregister_device(&shca->ib_device);
848
849 probe6:
850 ret = ehca_dereg_internal_maxmr(shca);
851 if (ret)
852 ehca_err(&shca->ib_device,
853 "Cannot destroy internal MR. ret=%x", ret);
854
855 probe5:
856 ret = ehca_dealloc_pd(&shca->pd->ib_pd);
857 if (ret)
858 ehca_err(&shca->ib_device,
859 "Cannot destroy internal PD. ret=%x", ret);
860
861 probe4:
862 ret = ehca_destroy_eq(shca, &shca->neq);
863 if (ret)
864 ehca_err(&shca->ib_device,
865 "Cannot destroy NEQ. ret=%x", ret);
866
867 probe3:
868 ret = ehca_destroy_eq(shca, &shca->eq);
869 if (ret)
870 ehca_err(&shca->ib_device,
871 "Cannot destroy EQ. ret=%x", ret);
872
873 probe1:
874 ib_dealloc_device(&shca->ib_device);
875
876 return -EINVAL;
877 }
878
ehca_remove(struct of_device * dev)879 static int __devexit ehca_remove(struct of_device *dev)
880 {
881 struct ehca_shca *shca = dev->dev.driver_data;
882 unsigned long flags;
883 int ret;
884
885 sysfs_remove_group(&dev->dev.kobj, &ehca_dev_attr_grp);
886
887 if (ehca_open_aqp1 == 1) {
888 int i;
889 for (i = 0; i < shca->num_ports; i++) {
890 ret = ehca_destroy_aqp1(&shca->sport[i]);
891 if (ret)
892 ehca_err(&shca->ib_device,
893 "Cannot destroy AQP1 for port %x "
894 "ret=%i", ret, i);
895 }
896 }
897
898 ib_unregister_device(&shca->ib_device);
899
900 ret = ehca_dereg_internal_maxmr(shca);
901 if (ret)
902 ehca_err(&shca->ib_device,
903 "Cannot destroy internal MR. ret=%i", ret);
904
905 ret = ehca_dealloc_pd(&shca->pd->ib_pd);
906 if (ret)
907 ehca_err(&shca->ib_device,
908 "Cannot destroy internal PD. ret=%i", ret);
909
910 ret = ehca_destroy_eq(shca, &shca->eq);
911 if (ret)
912 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%i", ret);
913
914 ret = ehca_destroy_eq(shca, &shca->neq);
915 if (ret)
916 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%i", ret);
917
918 ib_dealloc_device(&shca->ib_device);
919
920 spin_lock_irqsave(&shca_list_lock, flags);
921 list_del(&shca->shca_list);
922 spin_unlock_irqrestore(&shca_list_lock, flags);
923
924 return ret;
925 }
926
927 static struct of_device_id ehca_device_table[] =
928 {
929 {
930 .name = "lhca",
931 .compatible = "IBM,lhca",
932 },
933 {},
934 };
935 MODULE_DEVICE_TABLE(of, ehca_device_table);
936
937 static struct of_platform_driver ehca_driver = {
938 .name = "ehca",
939 .match_table = ehca_device_table,
940 .probe = ehca_probe,
941 .remove = ehca_remove,
942 .driver = {
943 .groups = ehca_drv_attr_groups,
944 },
945 };
946
ehca_poll_eqs(unsigned long data)947 void ehca_poll_eqs(unsigned long data)
948 {
949 struct ehca_shca *shca;
950
951 spin_lock(&shca_list_lock);
952 list_for_each_entry(shca, &shca_list, shca_list) {
953 if (shca->eq.is_initialized) {
954 /* call deadman proc only if eq ptr does not change */
955 struct ehca_eq *eq = &shca->eq;
956 int max = 3;
957 volatile u64 q_ofs, q_ofs2;
958 unsigned long flags;
959 spin_lock_irqsave(&eq->spinlock, flags);
960 q_ofs = eq->ipz_queue.current_q_offset;
961 spin_unlock_irqrestore(&eq->spinlock, flags);
962 do {
963 spin_lock_irqsave(&eq->spinlock, flags);
964 q_ofs2 = eq->ipz_queue.current_q_offset;
965 spin_unlock_irqrestore(&eq->spinlock, flags);
966 max--;
967 } while (q_ofs == q_ofs2 && max > 0);
968 if (q_ofs == q_ofs2)
969 ehca_process_eq(shca, 0);
970 }
971 }
972 mod_timer(&poll_eqs_timer, round_jiffies(jiffies + HZ));
973 spin_unlock(&shca_list_lock);
974 }
975
ehca_mem_notifier(struct notifier_block * nb,unsigned long action,void * data)976 static int ehca_mem_notifier(struct notifier_block *nb,
977 unsigned long action, void *data)
978 {
979 static unsigned long ehca_dmem_warn_time;
980 unsigned long flags;
981
982 switch (action) {
983 case MEM_CANCEL_OFFLINE:
984 case MEM_CANCEL_ONLINE:
985 case MEM_ONLINE:
986 case MEM_OFFLINE:
987 return NOTIFY_OK;
988 case MEM_GOING_ONLINE:
989 case MEM_GOING_OFFLINE:
990 /* only ok if no hca is attached to the lpar */
991 spin_lock_irqsave(&shca_list_lock, flags);
992 if (list_empty(&shca_list)) {
993 spin_unlock_irqrestore(&shca_list_lock, flags);
994 return NOTIFY_OK;
995 } else {
996 spin_unlock_irqrestore(&shca_list_lock, flags);
997 if (printk_timed_ratelimit(&ehca_dmem_warn_time,
998 30 * 1000))
999 ehca_gen_err("DMEM operations are not allowed"
1000 "in conjunction with eHCA");
1001 return NOTIFY_BAD;
1002 }
1003 }
1004 return NOTIFY_OK;
1005 }
1006
1007 static struct notifier_block ehca_mem_nb = {
1008 .notifier_call = ehca_mem_notifier,
1009 };
1010
ehca_module_init(void)1011 static int __init ehca_module_init(void)
1012 {
1013 int ret;
1014
1015 printk(KERN_INFO "eHCA Infiniband Device Driver "
1016 "(Version " HCAD_VERSION ")\n");
1017
1018 ret = ehca_create_comp_pool();
1019 if (ret) {
1020 ehca_gen_err("Cannot create comp pool.");
1021 return ret;
1022 }
1023
1024 ret = ehca_create_slab_caches();
1025 if (ret) {
1026 ehca_gen_err("Cannot create SLAB caches");
1027 ret = -ENOMEM;
1028 goto module_init1;
1029 }
1030
1031 ret = ibmebus_register_driver(&ehca_driver);
1032 if (ret) {
1033 ehca_gen_err("Cannot register eHCA device driver");
1034 ret = -EINVAL;
1035 goto module_init2;
1036 }
1037
1038 ret = register_memory_notifier(&ehca_mem_nb);
1039 if (ret) {
1040 ehca_gen_err("Failed registering memory add/remove notifier");
1041 goto module_init3;
1042 }
1043
1044 if (ehca_poll_all_eqs != 1) {
1045 ehca_gen_err("WARNING!!!");
1046 ehca_gen_err("It is possible to lose interrupts.");
1047 } else {
1048 init_timer(&poll_eqs_timer);
1049 poll_eqs_timer.function = ehca_poll_eqs;
1050 poll_eqs_timer.expires = jiffies + HZ;
1051 add_timer(&poll_eqs_timer);
1052 }
1053
1054 return 0;
1055
1056 module_init3:
1057 ibmebus_unregister_driver(&ehca_driver);
1058
1059 module_init2:
1060 ehca_destroy_slab_caches();
1061
1062 module_init1:
1063 ehca_destroy_comp_pool();
1064 return ret;
1065 };
1066
ehca_module_exit(void)1067 static void __exit ehca_module_exit(void)
1068 {
1069 if (ehca_poll_all_eqs == 1)
1070 del_timer_sync(&poll_eqs_timer);
1071
1072 ibmebus_unregister_driver(&ehca_driver);
1073
1074 unregister_memory_notifier(&ehca_mem_nb);
1075
1076 ehca_destroy_slab_caches();
1077
1078 ehca_destroy_comp_pool();
1079
1080 idr_destroy(&ehca_cq_idr);
1081 idr_destroy(&ehca_qp_idr);
1082 };
1083
1084 module_init(ehca_module_init);
1085 module_exit(ehca_module_exit);
1086