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Merge branch 'linus' into core/softlockup
[mirror_ubuntu-hirsute-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 "ehca_classes.h"
48 #include "ehca_iverbs.h"
49 #include "ehca_mrmw.h"
50 #include "ehca_tools.h"
51 #include "hcp_if.h"
52
53 #define HCAD_VERSION "0026"
54
55 MODULE_LICENSE("Dual BSD/GPL");
56 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
57 MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver");
58 MODULE_VERSION(HCAD_VERSION);
59
60 static int ehca_open_aqp1 = 0;
61 static int ehca_hw_level = 0;
62 static int ehca_poll_all_eqs = 1;
63
64 int ehca_debug_level = 0;
65 int ehca_nr_ports = 2;
66 int ehca_use_hp_mr = 0;
67 int ehca_port_act_time = 30;
68 int ehca_static_rate = -1;
69 int ehca_scaling_code = 0;
70 int ehca_lock_hcalls = -1;
71 int ehca_max_cq = -1;
72 int ehca_max_qp = -1;
73
74 module_param_named(open_aqp1, ehca_open_aqp1, bool, S_IRUGO);
75 module_param_named(debug_level, ehca_debug_level, int, S_IRUGO);
76 module_param_named(hw_level, ehca_hw_level, int, S_IRUGO);
77 module_param_named(nr_ports, ehca_nr_ports, int, S_IRUGO);
78 module_param_named(use_hp_mr, ehca_use_hp_mr, bool, S_IRUGO);
79 module_param_named(port_act_time, ehca_port_act_time, int, S_IRUGO);
80 module_param_named(poll_all_eqs, ehca_poll_all_eqs, bool, S_IRUGO);
81 module_param_named(static_rate, ehca_static_rate, int, S_IRUGO);
82 module_param_named(scaling_code, ehca_scaling_code, bool, S_IRUGO);
83 module_param_named(lock_hcalls, ehca_lock_hcalls, bool, S_IRUGO);
84 module_param_named(number_of_cqs, ehca_max_cq, int, S_IRUGO);
85 module_param_named(number_of_qps, ehca_max_qp, int, S_IRUGO);
86
87 MODULE_PARM_DESC(open_aqp1,
88 "Open AQP1 on startup (default: no)");
89 MODULE_PARM_DESC(debug_level,
90 "Amount of debug output (0: none (default), 1: traces, "
91 "2: some dumps, 3: lots)");
92 MODULE_PARM_DESC(hw_level,
93 "Hardware level (0: autosensing (default), "
94 "0x10..0x14: eHCA, 0x20..0x23: eHCA2)");
95 MODULE_PARM_DESC(nr_ports,
96 "number of connected ports (-1: autodetect, 1: port one only, "
97 "2: two ports (default)");
98 MODULE_PARM_DESC(use_hp_mr,
99 "Use high performance MRs (default: no)");
100 MODULE_PARM_DESC(port_act_time,
101 "Time to wait for port activation (default: 30 sec)");
102 MODULE_PARM_DESC(poll_all_eqs,
103 "Poll all event queues periodically (default: yes)");
104 MODULE_PARM_DESC(static_rate,
105 "Set permanent static rate (default: no static rate)");
106 MODULE_PARM_DESC(scaling_code,
107 "Enable scaling code (default: no)");
108 MODULE_PARM_DESC(lock_hcalls,
109 "Serialize all hCalls made by the driver "
110 "(default: autodetect)");
111 MODULE_PARM_DESC(number_of_cqs,
112 "Max number of CQs which can be allocated "
113 "(default: autodetect)");
114 MODULE_PARM_DESC(number_of_qps,
115 "Max number of QPs which can be allocated "
116 "(default: autodetect)");
117
118 DEFINE_RWLOCK(ehca_qp_idr_lock);
119 DEFINE_RWLOCK(ehca_cq_idr_lock);
120 DEFINE_IDR(ehca_qp_idr);
121 DEFINE_IDR(ehca_cq_idr);
122
123 static LIST_HEAD(shca_list); /* list of all registered ehcas */
124 static DEFINE_SPINLOCK(shca_list_lock);
125
126 static struct timer_list poll_eqs_timer;
127
128 #ifdef CONFIG_PPC_64K_PAGES
129 static struct kmem_cache *ctblk_cache;
130
131 void *ehca_alloc_fw_ctrlblock(gfp_t flags)
132 {
133 void *ret = kmem_cache_zalloc(ctblk_cache, flags);
134 if (!ret)
135 ehca_gen_err("Out of memory for ctblk");
136 return ret;
137 }
138
139 void ehca_free_fw_ctrlblock(void *ptr)
140 {
141 if (ptr)
142 kmem_cache_free(ctblk_cache, ptr);
143
144 }
145 #endif
146
147 int ehca2ib_return_code(u64 ehca_rc)
148 {
149 switch (ehca_rc) {
150 case H_SUCCESS:
151 return 0;
152 case H_RESOURCE: /* Resource in use */
153 case H_BUSY:
154 return -EBUSY;
155 case H_NOT_ENOUGH_RESOURCES: /* insufficient resources */
156 case H_CONSTRAINED: /* resource constraint */
157 case H_NO_MEM:
158 return -ENOMEM;
159 default:
160 return -EINVAL;
161 }
162 }
163
164 static int ehca_create_slab_caches(void)
165 {
166 int ret;
167
168 ret = ehca_init_pd_cache();
169 if (ret) {
170 ehca_gen_err("Cannot create PD SLAB cache.");
171 return ret;
172 }
173
174 ret = ehca_init_cq_cache();
175 if (ret) {
176 ehca_gen_err("Cannot create CQ SLAB cache.");
177 goto create_slab_caches2;
178 }
179
180 ret = ehca_init_qp_cache();
181 if (ret) {
182 ehca_gen_err("Cannot create QP SLAB cache.");
183 goto create_slab_caches3;
184 }
185
186 ret = ehca_init_av_cache();
187 if (ret) {
188 ehca_gen_err("Cannot create AV SLAB cache.");
189 goto create_slab_caches4;
190 }
191
192 ret = ehca_init_mrmw_cache();
193 if (ret) {
194 ehca_gen_err("Cannot create MR&MW SLAB cache.");
195 goto create_slab_caches5;
196 }
197
198 ret = ehca_init_small_qp_cache();
199 if (ret) {
200 ehca_gen_err("Cannot create small queue SLAB cache.");
201 goto create_slab_caches6;
202 }
203
204 #ifdef CONFIG_PPC_64K_PAGES
205 ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
206 EHCA_PAGESIZE, H_CB_ALIGNMENT,
207 SLAB_HWCACHE_ALIGN,
208 NULL);
209 if (!ctblk_cache) {
210 ehca_gen_err("Cannot create ctblk SLAB cache.");
211 ehca_cleanup_small_qp_cache();
212 goto create_slab_caches6;
213 }
214 #endif
215 return 0;
216
217 create_slab_caches6:
218 ehca_cleanup_mrmw_cache();
219
220 create_slab_caches5:
221 ehca_cleanup_av_cache();
222
223 create_slab_caches4:
224 ehca_cleanup_qp_cache();
225
226 create_slab_caches3:
227 ehca_cleanup_cq_cache();
228
229 create_slab_caches2:
230 ehca_cleanup_pd_cache();
231
232 return ret;
233 }
234
235 static void ehca_destroy_slab_caches(void)
236 {
237 ehca_cleanup_small_qp_cache();
238 ehca_cleanup_mrmw_cache();
239 ehca_cleanup_av_cache();
240 ehca_cleanup_qp_cache();
241 ehca_cleanup_cq_cache();
242 ehca_cleanup_pd_cache();
243 #ifdef CONFIG_PPC_64K_PAGES
244 if (ctblk_cache)
245 kmem_cache_destroy(ctblk_cache);
246 #endif
247 }
248
249 #define EHCA_HCAAVER EHCA_BMASK_IBM(32, 39)
250 #define EHCA_REVID EHCA_BMASK_IBM(40, 63)
251
252 static struct cap_descr {
253 u64 mask;
254 char *descr;
255 } hca_cap_descr[] = {
256 { HCA_CAP_AH_PORT_NR_CHECK, "HCA_CAP_AH_PORT_NR_CHECK" },
257 { HCA_CAP_ATOMIC, "HCA_CAP_ATOMIC" },
258 { HCA_CAP_AUTO_PATH_MIG, "HCA_CAP_AUTO_PATH_MIG" },
259 { HCA_CAP_BAD_P_KEY_CTR, "HCA_CAP_BAD_P_KEY_CTR" },
260 { HCA_CAP_SQD_RTS_PORT_CHANGE, "HCA_CAP_SQD_RTS_PORT_CHANGE" },
261 { HCA_CAP_CUR_QP_STATE_MOD, "HCA_CAP_CUR_QP_STATE_MOD" },
262 { HCA_CAP_INIT_TYPE, "HCA_CAP_INIT_TYPE" },
263 { HCA_CAP_PORT_ACTIVE_EVENT, "HCA_CAP_PORT_ACTIVE_EVENT" },
264 { HCA_CAP_Q_KEY_VIOL_CTR, "HCA_CAP_Q_KEY_VIOL_CTR" },
265 { HCA_CAP_WQE_RESIZE, "HCA_CAP_WQE_RESIZE" },
266 { HCA_CAP_RAW_PACKET_MCAST, "HCA_CAP_RAW_PACKET_MCAST" },
267 { HCA_CAP_SHUTDOWN_PORT, "HCA_CAP_SHUTDOWN_PORT" },
268 { HCA_CAP_RC_LL_QP, "HCA_CAP_RC_LL_QP" },
269 { HCA_CAP_SRQ, "HCA_CAP_SRQ" },
270 { HCA_CAP_UD_LL_QP, "HCA_CAP_UD_LL_QP" },
271 { HCA_CAP_RESIZE_MR, "HCA_CAP_RESIZE_MR" },
272 { HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" },
273 { HCA_CAP_H_ALLOC_RES_SYNC, "HCA_CAP_H_ALLOC_RES_SYNC" },
274 };
275
276 static int ehca_sense_attributes(struct ehca_shca *shca)
277 {
278 int i, ret = 0;
279 u64 h_ret;
280 struct hipz_query_hca *rblock;
281 struct hipz_query_port *port;
282 const char *loc_code;
283
284 static const u32 pgsize_map[] = {
285 HCA_CAP_MR_PGSIZE_4K, 0x1000,
286 HCA_CAP_MR_PGSIZE_64K, 0x10000,
287 HCA_CAP_MR_PGSIZE_1M, 0x100000,
288 HCA_CAP_MR_PGSIZE_16M, 0x1000000,
289 };
290
291 ehca_gen_dbg("Probing adapter %s...",
292 shca->ofdev->node->full_name);
293 loc_code = of_get_property(shca->ofdev->node, "ibm,loc-code", NULL);
294 if (loc_code)
295 ehca_gen_dbg(" ... location lode=%s", loc_code);
296
297 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
298 if (!rblock) {
299 ehca_gen_err("Cannot allocate rblock memory.");
300 return -ENOMEM;
301 }
302
303 h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
304 if (h_ret != H_SUCCESS) {
305 ehca_gen_err("Cannot query device properties. h_ret=%li",
306 h_ret);
307 ret = -EPERM;
308 goto sense_attributes1;
309 }
310
311 if (ehca_nr_ports == 1)
312 shca->num_ports = 1;
313 else
314 shca->num_ports = (u8)rblock->num_ports;
315
316 ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
317
318 if (ehca_hw_level == 0) {
319 u32 hcaaver;
320 u32 revid;
321
322 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
323 revid = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
324
325 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
326
327 if (hcaaver == 1) {
328 if (revid <= 3)
329 shca->hw_level = 0x10 | (revid + 1);
330 else
331 shca->hw_level = 0x14;
332 } else if (hcaaver == 2) {
333 if (revid == 0)
334 shca->hw_level = 0x21;
335 else if (revid == 0x10)
336 shca->hw_level = 0x22;
337 else if (revid == 0x20 || revid == 0x21)
338 shca->hw_level = 0x23;
339 }
340
341 if (!shca->hw_level) {
342 ehca_gen_warn("unknown hardware version"
343 " - assuming default level");
344 shca->hw_level = 0x22;
345 }
346 } else
347 shca->hw_level = ehca_hw_level;
348 ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
349
350 shca->hca_cap = rblock->hca_cap_indicators;
351 ehca_gen_dbg(" ... HCA capabilities:");
352 for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
353 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
354 ehca_gen_dbg(" %s", hca_cap_descr[i].descr);
355
356 /* Autodetect hCall locking -- the "H_ALLOC_RESOURCE synced" flag is
357 * a firmware property, so it's valid across all adapters
358 */
359 if (ehca_lock_hcalls == -1)
360 ehca_lock_hcalls = !(shca->hca_cap & HCA_CAP_H_ALLOC_RES_SYNC);
361
362 /* translate supported MR page sizes; always support 4K */
363 shca->hca_cap_mr_pgsize = EHCA_PAGESIZE;
364 for (i = 0; i < ARRAY_SIZE(pgsize_map); i += 2)
365 if (rblock->memory_page_size_supported & pgsize_map[i])
366 shca->hca_cap_mr_pgsize |= pgsize_map[i + 1];
367
368 /* Set maximum number of CQs and QPs to calculate EQ size */
369 if (ehca_max_qp == -1)
370 ehca_max_qp = min_t(int, rblock->max_qp, EHCA_MAX_NUM_QUEUES);
371 else if (ehca_max_qp < 1 || ehca_max_qp > rblock->max_qp) {
372 ehca_gen_err("Requested number of QPs is out of range (1 - %i) "
373 "specified by HW", rblock->max_qp);
374 ret = -EINVAL;
375 goto sense_attributes1;
376 }
377
378 if (ehca_max_cq == -1)
379 ehca_max_cq = min_t(int, rblock->max_cq, EHCA_MAX_NUM_QUEUES);
380 else if (ehca_max_cq < 1 || ehca_max_cq > rblock->max_cq) {
381 ehca_gen_err("Requested number of CQs is out of range (1 - %i) "
382 "specified by HW", rblock->max_cq);
383 ret = -EINVAL;
384 goto sense_attributes1;
385 }
386
387 /* query max MTU from first port -- it's the same for all ports */
388 port = (struct hipz_query_port *)rblock;
389 h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
390 if (h_ret != H_SUCCESS) {
391 ehca_gen_err("Cannot query port properties. h_ret=%li",
392 h_ret);
393 ret = -EPERM;
394 goto sense_attributes1;
395 }
396
397 shca->max_mtu = port->max_mtu;
398
399 sense_attributes1:
400 ehca_free_fw_ctrlblock(rblock);
401 return ret;
402 }
403
404 static int init_node_guid(struct ehca_shca *shca)
405 {
406 int ret = 0;
407 struct hipz_query_hca *rblock;
408
409 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
410 if (!rblock) {
411 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
412 return -ENOMEM;
413 }
414
415 if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
416 ehca_err(&shca->ib_device, "Can't query device properties");
417 ret = -EINVAL;
418 goto init_node_guid1;
419 }
420
421 memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
422
423 init_node_guid1:
424 ehca_free_fw_ctrlblock(rblock);
425 return ret;
426 }
427
428 static int ehca_init_device(struct ehca_shca *shca)
429 {
430 int ret;
431
432 ret = init_node_guid(shca);
433 if (ret)
434 return ret;
435
436 strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
437 shca->ib_device.owner = THIS_MODULE;
438
439 shca->ib_device.uverbs_abi_ver = 8;
440 shca->ib_device.uverbs_cmd_mask =
441 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
442 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
443 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
444 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
445 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
446 (1ull << IB_USER_VERBS_CMD_REG_MR) |
447 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
448 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
449 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
450 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
451 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
452 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
453 (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
454 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
455 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) |
456 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
457
458 shca->ib_device.node_type = RDMA_NODE_IB_CA;
459 shca->ib_device.phys_port_cnt = shca->num_ports;
460 shca->ib_device.num_comp_vectors = 1;
461 shca->ib_device.dma_device = &shca->ofdev->dev;
462 shca->ib_device.query_device = ehca_query_device;
463 shca->ib_device.query_port = ehca_query_port;
464 shca->ib_device.query_gid = ehca_query_gid;
465 shca->ib_device.query_pkey = ehca_query_pkey;
466 /* shca->in_device.modify_device = ehca_modify_device */
467 shca->ib_device.modify_port = ehca_modify_port;
468 shca->ib_device.alloc_ucontext = ehca_alloc_ucontext;
469 shca->ib_device.dealloc_ucontext = ehca_dealloc_ucontext;
470 shca->ib_device.alloc_pd = ehca_alloc_pd;
471 shca->ib_device.dealloc_pd = ehca_dealloc_pd;
472 shca->ib_device.create_ah = ehca_create_ah;
473 /* shca->ib_device.modify_ah = ehca_modify_ah; */
474 shca->ib_device.query_ah = ehca_query_ah;
475 shca->ib_device.destroy_ah = ehca_destroy_ah;
476 shca->ib_device.create_qp = ehca_create_qp;
477 shca->ib_device.modify_qp = ehca_modify_qp;
478 shca->ib_device.query_qp = ehca_query_qp;
479 shca->ib_device.destroy_qp = ehca_destroy_qp;
480 shca->ib_device.post_send = ehca_post_send;
481 shca->ib_device.post_recv = ehca_post_recv;
482 shca->ib_device.create_cq = ehca_create_cq;
483 shca->ib_device.destroy_cq = ehca_destroy_cq;
484 shca->ib_device.resize_cq = ehca_resize_cq;
485 shca->ib_device.poll_cq = ehca_poll_cq;
486 /* shca->ib_device.peek_cq = ehca_peek_cq; */
487 shca->ib_device.req_notify_cq = ehca_req_notify_cq;
488 /* shca->ib_device.req_ncomp_notif = ehca_req_ncomp_notif; */
489 shca->ib_device.get_dma_mr = ehca_get_dma_mr;
490 shca->ib_device.reg_phys_mr = ehca_reg_phys_mr;
491 shca->ib_device.reg_user_mr = ehca_reg_user_mr;
492 shca->ib_device.query_mr = ehca_query_mr;
493 shca->ib_device.dereg_mr = ehca_dereg_mr;
494 shca->ib_device.rereg_phys_mr = ehca_rereg_phys_mr;
495 shca->ib_device.alloc_mw = ehca_alloc_mw;
496 shca->ib_device.bind_mw = ehca_bind_mw;
497 shca->ib_device.dealloc_mw = ehca_dealloc_mw;
498 shca->ib_device.alloc_fmr = ehca_alloc_fmr;
499 shca->ib_device.map_phys_fmr = ehca_map_phys_fmr;
500 shca->ib_device.unmap_fmr = ehca_unmap_fmr;
501 shca->ib_device.dealloc_fmr = ehca_dealloc_fmr;
502 shca->ib_device.attach_mcast = ehca_attach_mcast;
503 shca->ib_device.detach_mcast = ehca_detach_mcast;
504 shca->ib_device.process_mad = ehca_process_mad;
505 shca->ib_device.mmap = ehca_mmap;
506
507 if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
508 shca->ib_device.uverbs_cmd_mask |=
509 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
510 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
511 (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
512 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
513
514 shca->ib_device.create_srq = ehca_create_srq;
515 shca->ib_device.modify_srq = ehca_modify_srq;
516 shca->ib_device.query_srq = ehca_query_srq;
517 shca->ib_device.destroy_srq = ehca_destroy_srq;
518 shca->ib_device.post_srq_recv = ehca_post_srq_recv;
519 }
520
521 return ret;
522 }
523
524 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
525 {
526 struct ehca_sport *sport = &shca->sport[port - 1];
527 struct ib_cq *ibcq;
528 struct ib_qp *ibqp;
529 struct ib_qp_init_attr qp_init_attr;
530 int ret;
531
532 if (sport->ibcq_aqp1) {
533 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
534 return -EPERM;
535 }
536
537 ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void *)(-1), 10, 0);
538 if (IS_ERR(ibcq)) {
539 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
540 return PTR_ERR(ibcq);
541 }
542 sport->ibcq_aqp1 = ibcq;
543
544 if (sport->ibqp_sqp[IB_QPT_GSI]) {
545 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
546 ret = -EPERM;
547 goto create_aqp1;
548 }
549
550 memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
551 qp_init_attr.send_cq = ibcq;
552 qp_init_attr.recv_cq = ibcq;
553 qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
554 qp_init_attr.cap.max_send_wr = 100;
555 qp_init_attr.cap.max_recv_wr = 100;
556 qp_init_attr.cap.max_send_sge = 2;
557 qp_init_attr.cap.max_recv_sge = 1;
558 qp_init_attr.qp_type = IB_QPT_GSI;
559 qp_init_attr.port_num = port;
560 qp_init_attr.qp_context = NULL;
561 qp_init_attr.event_handler = NULL;
562 qp_init_attr.srq = NULL;
563
564 ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
565 if (IS_ERR(ibqp)) {
566 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
567 ret = PTR_ERR(ibqp);
568 goto create_aqp1;
569 }
570 sport->ibqp_sqp[IB_QPT_GSI] = ibqp;
571
572 return 0;
573
574 create_aqp1:
575 ib_destroy_cq(sport->ibcq_aqp1);
576 return ret;
577 }
578
579 static int ehca_destroy_aqp1(struct ehca_sport *sport)
580 {
581 int ret;
582
583 ret = ib_destroy_qp(sport->ibqp_sqp[IB_QPT_GSI]);
584 if (ret) {
585 ehca_gen_err("Cannot destroy AQP1 QP. ret=%i", ret);
586 return ret;
587 }
588
589 ret = ib_destroy_cq(sport->ibcq_aqp1);
590 if (ret)
591 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%i", ret);
592
593 return ret;
594 }
595
596 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
597 {
598 return snprintf(buf, PAGE_SIZE, "%d\n", ehca_debug_level);
599 }
600
601 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
602 const char *buf, size_t count)
603 {
604 int value = (*buf) - '0';
605 if (value >= 0 && value <= 9)
606 ehca_debug_level = value;
607 return 1;
608 }
609
610 static DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
611 ehca_show_debug_level, ehca_store_debug_level);
612
613 static struct attribute *ehca_drv_attrs[] = {
614 &driver_attr_debug_level.attr,
615 NULL
616 };
617
618 static struct attribute_group ehca_drv_attr_grp = {
619 .attrs = ehca_drv_attrs
620 };
621
622 static struct attribute_group *ehca_drv_attr_groups[] = {
623 &ehca_drv_attr_grp,
624 NULL,
625 };
626
627 #define EHCA_RESOURCE_ATTR(name) \
628 static ssize_t ehca_show_##name(struct device *dev, \
629 struct device_attribute *attr, \
630 char *buf) \
631 { \
632 struct ehca_shca *shca; \
633 struct hipz_query_hca *rblock; \
634 int data; \
635 \
636 shca = dev->driver_data; \
637 \
638 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL); \
639 if (!rblock) { \
640 dev_err(dev, "Can't allocate rblock memory.\n"); \
641 return 0; \
642 } \
643 \
644 if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
645 dev_err(dev, "Can't query device properties\n"); \
646 ehca_free_fw_ctrlblock(rblock); \
647 return 0; \
648 } \
649 \
650 data = rblock->name; \
651 ehca_free_fw_ctrlblock(rblock); \
652 \
653 if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1)) \
654 return snprintf(buf, 256, "1\n"); \
655 else \
656 return snprintf(buf, 256, "%d\n", data); \
657 \
658 } \
659 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
660
661 EHCA_RESOURCE_ATTR(num_ports);
662 EHCA_RESOURCE_ATTR(hw_ver);
663 EHCA_RESOURCE_ATTR(max_eq);
664 EHCA_RESOURCE_ATTR(cur_eq);
665 EHCA_RESOURCE_ATTR(max_cq);
666 EHCA_RESOURCE_ATTR(cur_cq);
667 EHCA_RESOURCE_ATTR(max_qp);
668 EHCA_RESOURCE_ATTR(cur_qp);
669 EHCA_RESOURCE_ATTR(max_mr);
670 EHCA_RESOURCE_ATTR(cur_mr);
671 EHCA_RESOURCE_ATTR(max_mw);
672 EHCA_RESOURCE_ATTR(cur_mw);
673 EHCA_RESOURCE_ATTR(max_pd);
674 EHCA_RESOURCE_ATTR(max_ah);
675
676 static ssize_t ehca_show_adapter_handle(struct device *dev,
677 struct device_attribute *attr,
678 char *buf)
679 {
680 struct ehca_shca *shca = dev->driver_data;
681
682 return sprintf(buf, "%lx\n", shca->ipz_hca_handle.handle);
683
684 }
685 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
686
687 static struct attribute *ehca_dev_attrs[] = {
688 &dev_attr_adapter_handle.attr,
689 &dev_attr_num_ports.attr,
690 &dev_attr_hw_ver.attr,
691 &dev_attr_max_eq.attr,
692 &dev_attr_cur_eq.attr,
693 &dev_attr_max_cq.attr,
694 &dev_attr_cur_cq.attr,
695 &dev_attr_max_qp.attr,
696 &dev_attr_cur_qp.attr,
697 &dev_attr_max_mr.attr,
698 &dev_attr_cur_mr.attr,
699 &dev_attr_max_mw.attr,
700 &dev_attr_cur_mw.attr,
701 &dev_attr_max_pd.attr,
702 &dev_attr_max_ah.attr,
703 NULL
704 };
705
706 static struct attribute_group ehca_dev_attr_grp = {
707 .attrs = ehca_dev_attrs
708 };
709
710 static int __devinit ehca_probe(struct of_device *dev,
711 const struct of_device_id *id)
712 {
713 struct ehca_shca *shca;
714 const u64 *handle;
715 struct ib_pd *ibpd;
716 int ret, i, eq_size;
717
718 handle = of_get_property(dev->node, "ibm,hca-handle", NULL);
719 if (!handle) {
720 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
721 dev->node->full_name);
722 return -ENODEV;
723 }
724
725 if (!(*handle)) {
726 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
727 dev->node->full_name);
728 return -ENODEV;
729 }
730
731 shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
732 if (!shca) {
733 ehca_gen_err("Cannot allocate shca memory.");
734 return -ENOMEM;
735 }
736 mutex_init(&shca->modify_mutex);
737 atomic_set(&shca->num_cqs, 0);
738 atomic_set(&shca->num_qps, 0);
739 for (i = 0; i < ARRAY_SIZE(shca->sport); i++)
740 spin_lock_init(&shca->sport[i].mod_sqp_lock);
741
742 shca->ofdev = dev;
743 shca->ipz_hca_handle.handle = *handle;
744 dev->dev.driver_data = shca;
745
746 ret = ehca_sense_attributes(shca);
747 if (ret < 0) {
748 ehca_gen_err("Cannot sense eHCA attributes.");
749 goto probe1;
750 }
751
752 ret = ehca_init_device(shca);
753 if (ret) {
754 ehca_gen_err("Cannot init ehca device struct");
755 goto probe1;
756 }
757
758 eq_size = 2 * ehca_max_cq + 4 * ehca_max_qp;
759 /* create event queues */
760 ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, eq_size);
761 if (ret) {
762 ehca_err(&shca->ib_device, "Cannot create EQ.");
763 goto probe1;
764 }
765
766 ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
767 if (ret) {
768 ehca_err(&shca->ib_device, "Cannot create NEQ.");
769 goto probe3;
770 }
771
772 /* create internal protection domain */
773 ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL);
774 if (IS_ERR(ibpd)) {
775 ehca_err(&shca->ib_device, "Cannot create internal PD.");
776 ret = PTR_ERR(ibpd);
777 goto probe4;
778 }
779
780 shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
781 shca->pd->ib_pd.device = &shca->ib_device;
782
783 /* create internal max MR */
784 ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
785
786 if (ret) {
787 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%i",
788 ret);
789 goto probe5;
790 }
791
792 ret = ib_register_device(&shca->ib_device);
793 if (ret) {
794 ehca_err(&shca->ib_device,
795 "ib_register_device() failed ret=%i", ret);
796 goto probe6;
797 }
798
799 /* create AQP1 for port 1 */
800 if (ehca_open_aqp1 == 1) {
801 shca->sport[0].port_state = IB_PORT_DOWN;
802 ret = ehca_create_aqp1(shca, 1);
803 if (ret) {
804 ehca_err(&shca->ib_device,
805 "Cannot create AQP1 for port 1.");
806 goto probe7;
807 }
808 }
809
810 /* create AQP1 for port 2 */
811 if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
812 shca->sport[1].port_state = IB_PORT_DOWN;
813 ret = ehca_create_aqp1(shca, 2);
814 if (ret) {
815 ehca_err(&shca->ib_device,
816 "Cannot create AQP1 for port 2.");
817 goto probe8;
818 }
819 }
820
821 ret = sysfs_create_group(&dev->dev.kobj, &ehca_dev_attr_grp);
822 if (ret) /* only complain; we can live without attributes */
823 ehca_err(&shca->ib_device,
824 "Cannot create device attributes ret=%d", ret);
825
826 spin_lock(&shca_list_lock);
827 list_add(&shca->shca_list, &shca_list);
828 spin_unlock(&shca_list_lock);
829
830 return 0;
831
832 probe8:
833 ret = ehca_destroy_aqp1(&shca->sport[0]);
834 if (ret)
835 ehca_err(&shca->ib_device,
836 "Cannot destroy AQP1 for port 1. ret=%i", ret);
837
838 probe7:
839 ib_unregister_device(&shca->ib_device);
840
841 probe6:
842 ret = ehca_dereg_internal_maxmr(shca);
843 if (ret)
844 ehca_err(&shca->ib_device,
845 "Cannot destroy internal MR. ret=%x", ret);
846
847 probe5:
848 ret = ehca_dealloc_pd(&shca->pd->ib_pd);
849 if (ret)
850 ehca_err(&shca->ib_device,
851 "Cannot destroy internal PD. ret=%x", ret);
852
853 probe4:
854 ret = ehca_destroy_eq(shca, &shca->neq);
855 if (ret)
856 ehca_err(&shca->ib_device,
857 "Cannot destroy NEQ. ret=%x", ret);
858
859 probe3:
860 ret = ehca_destroy_eq(shca, &shca->eq);
861 if (ret)
862 ehca_err(&shca->ib_device,
863 "Cannot destroy EQ. ret=%x", ret);
864
865 probe1:
866 ib_dealloc_device(&shca->ib_device);
867
868 return -EINVAL;
869 }
870
871 static int __devexit ehca_remove(struct of_device *dev)
872 {
873 struct ehca_shca *shca = dev->dev.driver_data;
874 int ret;
875
876 sysfs_remove_group(&dev->dev.kobj, &ehca_dev_attr_grp);
877
878 if (ehca_open_aqp1 == 1) {
879 int i;
880 for (i = 0; i < shca->num_ports; i++) {
881 ret = ehca_destroy_aqp1(&shca->sport[i]);
882 if (ret)
883 ehca_err(&shca->ib_device,
884 "Cannot destroy AQP1 for port %x "
885 "ret=%i", ret, i);
886 }
887 }
888
889 ib_unregister_device(&shca->ib_device);
890
891 ret = ehca_dereg_internal_maxmr(shca);
892 if (ret)
893 ehca_err(&shca->ib_device,
894 "Cannot destroy internal MR. ret=%i", ret);
895
896 ret = ehca_dealloc_pd(&shca->pd->ib_pd);
897 if (ret)
898 ehca_err(&shca->ib_device,
899 "Cannot destroy internal PD. ret=%i", ret);
900
901 ret = ehca_destroy_eq(shca, &shca->eq);
902 if (ret)
903 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%i", ret);
904
905 ret = ehca_destroy_eq(shca, &shca->neq);
906 if (ret)
907 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%i", ret);
908
909 ib_dealloc_device(&shca->ib_device);
910
911 spin_lock(&shca_list_lock);
912 list_del(&shca->shca_list);
913 spin_unlock(&shca_list_lock);
914
915 return ret;
916 }
917
918 static struct of_device_id ehca_device_table[] =
919 {
920 {
921 .name = "lhca",
922 .compatible = "IBM,lhca",
923 },
924 {},
925 };
926 MODULE_DEVICE_TABLE(of, ehca_device_table);
927
928 static struct of_platform_driver ehca_driver = {
929 .name = "ehca",
930 .match_table = ehca_device_table,
931 .probe = ehca_probe,
932 .remove = ehca_remove,
933 .driver = {
934 .groups = ehca_drv_attr_groups,
935 },
936 };
937
938 void ehca_poll_eqs(unsigned long data)
939 {
940 struct ehca_shca *shca;
941
942 spin_lock(&shca_list_lock);
943 list_for_each_entry(shca, &shca_list, shca_list) {
944 if (shca->eq.is_initialized) {
945 /* call deadman proc only if eq ptr does not change */
946 struct ehca_eq *eq = &shca->eq;
947 int max = 3;
948 volatile u64 q_ofs, q_ofs2;
949 u64 flags;
950 spin_lock_irqsave(&eq->spinlock, flags);
951 q_ofs = eq->ipz_queue.current_q_offset;
952 spin_unlock_irqrestore(&eq->spinlock, flags);
953 do {
954 spin_lock_irqsave(&eq->spinlock, flags);
955 q_ofs2 = eq->ipz_queue.current_q_offset;
956 spin_unlock_irqrestore(&eq->spinlock, flags);
957 max--;
958 } while (q_ofs == q_ofs2 && max > 0);
959 if (q_ofs == q_ofs2)
960 ehca_process_eq(shca, 0);
961 }
962 }
963 mod_timer(&poll_eqs_timer, round_jiffies(jiffies + HZ));
964 spin_unlock(&shca_list_lock);
965 }
966
967 static int __init ehca_module_init(void)
968 {
969 int ret;
970
971 printk(KERN_INFO "eHCA Infiniband Device Driver "
972 "(Version " HCAD_VERSION ")\n");
973
974 ret = ehca_create_comp_pool();
975 if (ret) {
976 ehca_gen_err("Cannot create comp pool.");
977 return ret;
978 }
979
980 ret = ehca_create_slab_caches();
981 if (ret) {
982 ehca_gen_err("Cannot create SLAB caches");
983 ret = -ENOMEM;
984 goto module_init1;
985 }
986
987 ret = ibmebus_register_driver(&ehca_driver);
988 if (ret) {
989 ehca_gen_err("Cannot register eHCA device driver");
990 ret = -EINVAL;
991 goto module_init2;
992 }
993
994 if (ehca_poll_all_eqs != 1) {
995 ehca_gen_err("WARNING!!!");
996 ehca_gen_err("It is possible to lose interrupts.");
997 } else {
998 init_timer(&poll_eqs_timer);
999 poll_eqs_timer.function = ehca_poll_eqs;
1000 poll_eqs_timer.expires = jiffies + HZ;
1001 add_timer(&poll_eqs_timer);
1002 }
1003
1004 return 0;
1005
1006 module_init2:
1007 ehca_destroy_slab_caches();
1008
1009 module_init1:
1010 ehca_destroy_comp_pool();
1011 return ret;
1012 };
1013
1014 static void __exit ehca_module_exit(void)
1015 {
1016 if (ehca_poll_all_eqs == 1)
1017 del_timer_sync(&poll_eqs_timer);
1018
1019 ibmebus_unregister_driver(&ehca_driver);
1020
1021 ehca_destroy_slab_caches();
1022
1023 ehca_destroy_comp_pool();
1024
1025 idr_destroy(&ehca_cq_idr);
1026 idr_destroy(&ehca_qp_idr);
1027 };
1028
1029 module_init(ehca_module_init);
1030 module_exit(ehca_module_exit);
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