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Revert "[PATCH] paravirt: Add startup infrastructure for paravirtualization"
[pv_ops_mirror.git] / drivers / infiniband / hw / ehca / ehca_main.c
blobfe90e7454560c98884f91e184dcd0e5284db127e
1 /*
2 * IBM eServer eHCA Infiniband device driver for Linux on POWER
3 *
4 * module start stop, hca detection
5 *
6 * Authors: Heiko J Schick <schickhj@de.ibm.com>
7 * Hoang-Nam Nguyen <hnguyen@de.ibm.com>
8 * Joachim Fenkes <fenkes@de.ibm.com>
9 *
10 * Copyright (c) 2005 IBM Corporation
11 *
12 * All rights reserved.
13 *
14 * This source code is distributed under a dual license of GPL v2.0 and OpenIB
15 * BSD.
16 *
17 * OpenIB BSD License
18 *
19 * Redistribution and use in source and binary forms, with or without
20 * modification, are permitted provided that the following conditions are met:
21 *
22 * Redistributions of source code must retain the above copyright notice, this
23 * list of conditions and the following disclaimer.
24 *
25 * Redistributions in binary form must reproduce the above copyright notice,
26 * this list of conditions and the following disclaimer in the documentation
27 * and/or other materials
28 * provided with the distribution.
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
31 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
34 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
35 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
36 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
37 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
38 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
39 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
40 * POSSIBILITY OF SUCH DAMAGE.
41 */
42
43 #ifdef CONFIG_PPC_64K_PAGES
44 #include <linux/slab.h>
45 #endif
46 #include "ehca_classes.h"
47 #include "ehca_iverbs.h"
48 #include "ehca_mrmw.h"
49 #include "ehca_tools.h"
50 #include "hcp_if.h"
51
52 MODULE_LICENSE("Dual BSD/GPL");
53 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
54 MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver");
55 MODULE_VERSION("SVNEHCA_0022");
56
57 int ehca_open_aqp1 = 0;
58 int ehca_debug_level = 0;
59 int ehca_hw_level = 0;
60 int ehca_nr_ports = 2;
61 int ehca_use_hp_mr = 0;
62 int ehca_port_act_time = 30;
63 int ehca_poll_all_eqs = 1;
64 int ehca_static_rate = -1;
65 int ehca_scaling_code = 1;
66
67 module_param_named(open_aqp1, ehca_open_aqp1, int, 0);
68 module_param_named(debug_level, ehca_debug_level, int, 0);
69 module_param_named(hw_level, ehca_hw_level, int, 0);
70 module_param_named(nr_ports, ehca_nr_ports, int, 0);
71 module_param_named(use_hp_mr, ehca_use_hp_mr, int, 0);
72 module_param_named(port_act_time, ehca_port_act_time, int, 0);
73 module_param_named(poll_all_eqs, ehca_poll_all_eqs, int, 0);
74 module_param_named(static_rate, ehca_static_rate, int, 0);
75 module_param_named(scaling_code, ehca_scaling_code, int, 0);
76
77 MODULE_PARM_DESC(open_aqp1,
78 "AQP1 on startup (0: no (default), 1: yes)");
79 MODULE_PARM_DESC(debug_level,
80 "debug level"
81 " (0: no debug traces (default), 1: with debug traces)");
82 MODULE_PARM_DESC(hw_level,
83 "hardware level"
84 " (0: autosensing (default), 1: v. 0.20, 2: v. 0.21)");
85 MODULE_PARM_DESC(nr_ports,
86 "number of connected ports (default: 2)");
87 MODULE_PARM_DESC(use_hp_mr,
88 "high performance MRs (0: no (default), 1: yes)");
89 MODULE_PARM_DESC(port_act_time,
90 "time to wait for port activation (default: 30 sec)");
91 MODULE_PARM_DESC(poll_all_eqs,
92 "polls all event queues periodically"
93 " (0: no, 1: yes (default))");
94 MODULE_PARM_DESC(static_rate,
95 "set permanent static rate (default: disabled)");
96 MODULE_PARM_DESC(scaling_code,
97 "set scaling code (0: disabled, 1: enabled/default)");
98
99 spinlock_t ehca_qp_idr_lock;
100 spinlock_t ehca_cq_idr_lock;
101 DEFINE_IDR(ehca_qp_idr);
102 DEFINE_IDR(ehca_cq_idr);
103
104
105 static struct list_head shca_list; /* list of all registered ehcas */
106 static spinlock_t shca_list_lock;
107
108 static struct timer_list poll_eqs_timer;
109
110 #ifdef CONFIG_PPC_64K_PAGES
111 static struct kmem_cache *ctblk_cache = NULL;
112
113 void *ehca_alloc_fw_ctrlblock(gfp_t flags)
114 {
115 void *ret = kmem_cache_zalloc(ctblk_cache, flags);
116 if (!ret)
117 ehca_gen_err("Out of memory for ctblk");
118 return ret;
119 }
120
121 void ehca_free_fw_ctrlblock(void *ptr)
122 {
123 if (ptr)
124 kmem_cache_free(ctblk_cache, ptr);
125
126 }
127 #endif
128
129 static int ehca_create_slab_caches(void)
130 {
131 int ret;
132
133 ret = ehca_init_pd_cache();
134 if (ret) {
135 ehca_gen_err("Cannot create PD SLAB cache.");
136 return ret;
137 }
138
139 ret = ehca_init_cq_cache();
140 if (ret) {
141 ehca_gen_err("Cannot create CQ SLAB cache.");
142 goto create_slab_caches2;
143 }
144
145 ret = ehca_init_qp_cache();
146 if (ret) {
147 ehca_gen_err("Cannot create QP SLAB cache.");
148 goto create_slab_caches3;
149 }
150
151 ret = ehca_init_av_cache();
152 if (ret) {
153 ehca_gen_err("Cannot create AV SLAB cache.");
154 goto create_slab_caches4;
155 }
156
157 ret = ehca_init_mrmw_cache();
158 if (ret) {
159 ehca_gen_err("Cannot create MR&MW SLAB cache.");
160 goto create_slab_caches5;
161 }
162
163 #ifdef CONFIG_PPC_64K_PAGES
164 ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
165 EHCA_PAGESIZE, H_CB_ALIGNMENT,
166 SLAB_HWCACHE_ALIGN,
167 NULL, NULL);
168 if (!ctblk_cache) {
169 ehca_gen_err("Cannot create ctblk SLAB cache.");
170 ehca_cleanup_mrmw_cache();
171 goto create_slab_caches5;
172 }
173 #endif
174 return 0;
175
176 create_slab_caches5:
177 ehca_cleanup_av_cache();
178
179 create_slab_caches4:
180 ehca_cleanup_qp_cache();
181
182 create_slab_caches3:
183 ehca_cleanup_cq_cache();
184
185 create_slab_caches2:
186 ehca_cleanup_pd_cache();
187
188 return ret;
189 }
190
191 static void ehca_destroy_slab_caches(void)
192 {
193 ehca_cleanup_mrmw_cache();
194 ehca_cleanup_av_cache();
195 ehca_cleanup_qp_cache();
196 ehca_cleanup_cq_cache();
197 ehca_cleanup_pd_cache();
198 #ifdef CONFIG_PPC_64K_PAGES
199 if (ctblk_cache)
200 kmem_cache_destroy(ctblk_cache);
201 #endif
202 }
203
204 #define EHCA_HCAAVER EHCA_BMASK_IBM(32,39)
205 #define EHCA_REVID EHCA_BMASK_IBM(40,63)
206
207 int ehca_sense_attributes(struct ehca_shca *shca)
208 {
209 int ret = 0;
210 u64 h_ret;
211 struct hipz_query_hca *rblock;
212
213 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
214 if (!rblock) {
215 ehca_gen_err("Cannot allocate rblock memory.");
216 return -ENOMEM;
217 }
218
219 h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
220 if (h_ret != H_SUCCESS) {
221 ehca_gen_err("Cannot query device properties. h_ret=%lx",
222 h_ret);
223 ret = -EPERM;
224 goto num_ports1;
225 }
226
227 if (ehca_nr_ports == 1)
228 shca->num_ports = 1;
229 else
230 shca->num_ports = (u8)rblock->num_ports;
231
232 ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
233
234 if (ehca_hw_level == 0) {
235 u32 hcaaver;
236 u32 revid;
237
238 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
239 revid = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
240
241 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
242
243 if ((hcaaver == 1) && (revid == 0))
244 shca->hw_level = 0;
245 else if ((hcaaver == 1) && (revid == 1))
246 shca->hw_level = 1;
247 else if ((hcaaver == 1) && (revid == 2))
248 shca->hw_level = 2;
249 }
250 ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
251
252 shca->sport[0].rate = IB_RATE_30_GBPS;
253 shca->sport[1].rate = IB_RATE_30_GBPS;
254
255 num_ports1:
256 ehca_free_fw_ctrlblock(rblock);
257 return ret;
258 }
259
260 static int init_node_guid(struct ehca_shca *shca)
261 {
262 int ret = 0;
263 struct hipz_query_hca *rblock;
264
265 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
266 if (!rblock) {
267 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
268 return -ENOMEM;
269 }
270
271 if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
272 ehca_err(&shca->ib_device, "Can't query device properties");
273 ret = -EINVAL;
274 goto init_node_guid1;
275 }
276
277 memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
278
279 init_node_guid1:
280 ehca_free_fw_ctrlblock(rblock);
281 return ret;
282 }
283
284 int ehca_init_device(struct ehca_shca *shca)
285 {
286 int ret;
287
288 ret = init_node_guid(shca);
289 if (ret)
290 return ret;
291
292 strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
293 shca->ib_device.owner = THIS_MODULE;
294
295 shca->ib_device.uverbs_abi_ver = 6;
296 shca->ib_device.uverbs_cmd_mask =
297 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
298 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
299 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
300 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
301 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
302 (1ull << IB_USER_VERBS_CMD_REG_MR) |
303 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
304 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
305 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
306 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
307 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
308 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
309 (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
310 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
311 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) |
312 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
313
314 shca->ib_device.node_type = RDMA_NODE_IB_CA;
315 shca->ib_device.phys_port_cnt = shca->num_ports;
316 shca->ib_device.num_comp_vectors = 1;
317 shca->ib_device.dma_device = &shca->ibmebus_dev->ofdev.dev;
318 shca->ib_device.query_device = ehca_query_device;
319 shca->ib_device.query_port = ehca_query_port;
320 shca->ib_device.query_gid = ehca_query_gid;
321 shca->ib_device.query_pkey = ehca_query_pkey;
322 /* shca->in_device.modify_device = ehca_modify_device */
323 shca->ib_device.modify_port = ehca_modify_port;
324 shca->ib_device.alloc_ucontext = ehca_alloc_ucontext;
325 shca->ib_device.dealloc_ucontext = ehca_dealloc_ucontext;
326 shca->ib_device.alloc_pd = ehca_alloc_pd;
327 shca->ib_device.dealloc_pd = ehca_dealloc_pd;
328 shca->ib_device.create_ah = ehca_create_ah;
329 /* shca->ib_device.modify_ah = ehca_modify_ah; */
330 shca->ib_device.query_ah = ehca_query_ah;
331 shca->ib_device.destroy_ah = ehca_destroy_ah;
332 shca->ib_device.create_qp = ehca_create_qp;
333 shca->ib_device.modify_qp = ehca_modify_qp;
334 shca->ib_device.query_qp = ehca_query_qp;
335 shca->ib_device.destroy_qp = ehca_destroy_qp;
336 shca->ib_device.post_send = ehca_post_send;
337 shca->ib_device.post_recv = ehca_post_recv;
338 shca->ib_device.create_cq = ehca_create_cq;
339 shca->ib_device.destroy_cq = ehca_destroy_cq;
340 shca->ib_device.resize_cq = ehca_resize_cq;
341 shca->ib_device.poll_cq = ehca_poll_cq;
342 /* shca->ib_device.peek_cq = ehca_peek_cq; */
343 shca->ib_device.req_notify_cq = ehca_req_notify_cq;
344 /* shca->ib_device.req_ncomp_notif = ehca_req_ncomp_notif; */
345 shca->ib_device.get_dma_mr = ehca_get_dma_mr;
346 shca->ib_device.reg_phys_mr = ehca_reg_phys_mr;
347 shca->ib_device.reg_user_mr = ehca_reg_user_mr;
348 shca->ib_device.query_mr = ehca_query_mr;
349 shca->ib_device.dereg_mr = ehca_dereg_mr;
350 shca->ib_device.rereg_phys_mr = ehca_rereg_phys_mr;
351 shca->ib_device.alloc_mw = ehca_alloc_mw;
352 shca->ib_device.bind_mw = ehca_bind_mw;
353 shca->ib_device.dealloc_mw = ehca_dealloc_mw;
354 shca->ib_device.alloc_fmr = ehca_alloc_fmr;
355 shca->ib_device.map_phys_fmr = ehca_map_phys_fmr;
356 shca->ib_device.unmap_fmr = ehca_unmap_fmr;
357 shca->ib_device.dealloc_fmr = ehca_dealloc_fmr;
358 shca->ib_device.attach_mcast = ehca_attach_mcast;
359 shca->ib_device.detach_mcast = ehca_detach_mcast;
360 /* shca->ib_device.process_mad = ehca_process_mad; */
361 shca->ib_device.mmap = ehca_mmap;
362
363 return ret;
364 }
365
366 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
367 {
368 struct ehca_sport *sport = &shca->sport[port - 1];
369 struct ib_cq *ibcq;
370 struct ib_qp *ibqp;
371 struct ib_qp_init_attr qp_init_attr;
372 int ret;
373
374 if (sport->ibcq_aqp1) {
375 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
376 return -EPERM;
377 }
378
379 ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void*)(-1), 10, 0);
380 if (IS_ERR(ibcq)) {
381 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
382 return PTR_ERR(ibcq);
383 }
384 sport->ibcq_aqp1 = ibcq;
385
386 if (sport->ibqp_aqp1) {
387 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
388 ret = -EPERM;
389 goto create_aqp1;
390 }
391
392 memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
393 qp_init_attr.send_cq = ibcq;
394 qp_init_attr.recv_cq = ibcq;
395 qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
396 qp_init_attr.cap.max_send_wr = 100;
397 qp_init_attr.cap.max_recv_wr = 100;
398 qp_init_attr.cap.max_send_sge = 2;
399 qp_init_attr.cap.max_recv_sge = 1;
400 qp_init_attr.qp_type = IB_QPT_GSI;
401 qp_init_attr.port_num = port;
402 qp_init_attr.qp_context = NULL;
403 qp_init_attr.event_handler = NULL;
404 qp_init_attr.srq = NULL;
405
406 ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
407 if (IS_ERR(ibqp)) {
408 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
409 ret = PTR_ERR(ibqp);
410 goto create_aqp1;
411 }
412 sport->ibqp_aqp1 = ibqp;
413
414 return 0;
415
416 create_aqp1:
417 ib_destroy_cq(sport->ibcq_aqp1);
418 return ret;
419 }
420
421 static int ehca_destroy_aqp1(struct ehca_sport *sport)
422 {
423 int ret;
424
425 ret = ib_destroy_qp(sport->ibqp_aqp1);
426 if (ret) {
427 ehca_gen_err("Cannot destroy AQP1 QP. ret=%x", ret);
428 return ret;
429 }
430
431 ret = ib_destroy_cq(sport->ibcq_aqp1);
432 if (ret)
433 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%x", ret);
434
435 return ret;
436 }
437
438 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
439 {
440 return snprintf(buf, PAGE_SIZE, "%d\n",
441 ehca_debug_level);
442 }
443
444 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
445 const char *buf, size_t count)
446 {
447 int value = (*buf) - '0';
448 if (value >= 0 && value <= 9)
449 ehca_debug_level = value;
450 return 1;
451 }
452
453 DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
454 ehca_show_debug_level, ehca_store_debug_level);
455
456 void ehca_create_driver_sysfs(struct ibmebus_driver *drv)
457 {
458 driver_create_file(&drv->driver, &driver_attr_debug_level);
459 }
460
461 void ehca_remove_driver_sysfs(struct ibmebus_driver *drv)
462 {
463 driver_remove_file(&drv->driver, &driver_attr_debug_level);
464 }
465
466 #define EHCA_RESOURCE_ATTR(name) \
467 static ssize_t ehca_show_##name(struct device *dev, \
468 struct device_attribute *attr, \
469 char *buf) \
470 { \
471 struct ehca_shca *shca; \
472 struct hipz_query_hca *rblock; \
473 int data; \
474 \
475 shca = dev->driver_data; \
476 \
477 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL); \
478 if (!rblock) { \
479 dev_err(dev, "Can't allocate rblock memory."); \
480 return 0; \
481 } \
482 \
483 if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
484 dev_err(dev, "Can't query device properties"); \
485 ehca_free_fw_ctrlblock(rblock); \
486 return 0; \
487 } \
488 \
489 data = rblock->name; \
490 ehca_free_fw_ctrlblock(rblock); \
491 \
492 if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1)) \
493 return snprintf(buf, 256, "1\n"); \
494 else \
495 return snprintf(buf, 256, "%d\n", data); \
496 \
497 } \
498 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
499
500 EHCA_RESOURCE_ATTR(num_ports);
501 EHCA_RESOURCE_ATTR(hw_ver);
502 EHCA_RESOURCE_ATTR(max_eq);
503 EHCA_RESOURCE_ATTR(cur_eq);
504 EHCA_RESOURCE_ATTR(max_cq);
505 EHCA_RESOURCE_ATTR(cur_cq);
506 EHCA_RESOURCE_ATTR(max_qp);
507 EHCA_RESOURCE_ATTR(cur_qp);
508 EHCA_RESOURCE_ATTR(max_mr);
509 EHCA_RESOURCE_ATTR(cur_mr);
510 EHCA_RESOURCE_ATTR(max_mw);
511 EHCA_RESOURCE_ATTR(cur_mw);
512 EHCA_RESOURCE_ATTR(max_pd);
513 EHCA_RESOURCE_ATTR(max_ah);
514
515 static ssize_t ehca_show_adapter_handle(struct device *dev,
516 struct device_attribute *attr,
517 char *buf)
518 {
519 struct ehca_shca *shca = dev->driver_data;
520
521 return sprintf(buf, "%lx\n", shca->ipz_hca_handle.handle);
522
523 }
524 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
525
526
527 void ehca_create_device_sysfs(struct ibmebus_dev *dev)
528 {
529 device_create_file(&dev->ofdev.dev, &dev_attr_adapter_handle);
530 device_create_file(&dev->ofdev.dev, &dev_attr_num_ports);
531 device_create_file(&dev->ofdev.dev, &dev_attr_hw_ver);
532 device_create_file(&dev->ofdev.dev, &dev_attr_max_eq);
533 device_create_file(&dev->ofdev.dev, &dev_attr_cur_eq);
534 device_create_file(&dev->ofdev.dev, &dev_attr_max_cq);
535 device_create_file(&dev->ofdev.dev, &dev_attr_cur_cq);
536 device_create_file(&dev->ofdev.dev, &dev_attr_max_qp);
537 device_create_file(&dev->ofdev.dev, &dev_attr_cur_qp);
538 device_create_file(&dev->ofdev.dev, &dev_attr_max_mr);
539 device_create_file(&dev->ofdev.dev, &dev_attr_cur_mr);
540 device_create_file(&dev->ofdev.dev, &dev_attr_max_mw);
541 device_create_file(&dev->ofdev.dev, &dev_attr_cur_mw);
542 device_create_file(&dev->ofdev.dev, &dev_attr_max_pd);
543 device_create_file(&dev->ofdev.dev, &dev_attr_max_ah);
544 }
545
546 void ehca_remove_device_sysfs(struct ibmebus_dev *dev)
547 {
548 device_remove_file(&dev->ofdev.dev, &dev_attr_adapter_handle);
549 device_remove_file(&dev->ofdev.dev, &dev_attr_num_ports);
550 device_remove_file(&dev->ofdev.dev, &dev_attr_hw_ver);
551 device_remove_file(&dev->ofdev.dev, &dev_attr_max_eq);
552 device_remove_file(&dev->ofdev.dev, &dev_attr_cur_eq);
553 device_remove_file(&dev->ofdev.dev, &dev_attr_max_cq);
554 device_remove_file(&dev->ofdev.dev, &dev_attr_cur_cq);
555 device_remove_file(&dev->ofdev.dev, &dev_attr_max_qp);
556 device_remove_file(&dev->ofdev.dev, &dev_attr_cur_qp);
557 device_remove_file(&dev->ofdev.dev, &dev_attr_max_mr);
558 device_remove_file(&dev->ofdev.dev, &dev_attr_cur_mr);
559 device_remove_file(&dev->ofdev.dev, &dev_attr_max_mw);
560 device_remove_file(&dev->ofdev.dev, &dev_attr_cur_mw);
561 device_remove_file(&dev->ofdev.dev, &dev_attr_max_pd);
562 device_remove_file(&dev->ofdev.dev, &dev_attr_max_ah);
563 }
564
565 static int __devinit ehca_probe(struct ibmebus_dev *dev,
566 const struct of_device_id *id)
567 {
568 struct ehca_shca *shca;
569 const u64 *handle;
570 struct ib_pd *ibpd;
571 int ret;
572
573 handle = of_get_property(dev->ofdev.node, "ibm,hca-handle", NULL);
574 if (!handle) {
575 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
576 dev->ofdev.node->full_name);
577 return -ENODEV;
578 }
579
580 if (!(*handle)) {
581 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
582 dev->ofdev.node->full_name);
583 return -ENODEV;
584 }
585
586 shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
587 if (!shca) {
588 ehca_gen_err("Cannot allocate shca memory.");
589 return -ENOMEM;
590 }
591 mutex_init(&shca->modify_mutex);
592
593 shca->ibmebus_dev = dev;
594 shca->ipz_hca_handle.handle = *handle;
595 dev->ofdev.dev.driver_data = shca;
596
597 ret = ehca_sense_attributes(shca);
598 if (ret < 0) {
599 ehca_gen_err("Cannot sense eHCA attributes.");
600 goto probe1;
601 }
602
603 ret = ehca_init_device(shca);
604 if (ret) {
605 ehca_gen_err("Cannot init ehca device struct");
606 goto probe1;
607 }
608
609 /* create event queues */
610 ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, 2048);
611 if (ret) {
612 ehca_err(&shca->ib_device, "Cannot create EQ.");
613 goto probe1;
614 }
615
616 ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
617 if (ret) {
618 ehca_err(&shca->ib_device, "Cannot create NEQ.");
619 goto probe3;
620 }
621
622 /* create internal protection domain */
623 ibpd = ehca_alloc_pd(&shca->ib_device, (void*)(-1), NULL);
624 if (IS_ERR(ibpd)) {
625 ehca_err(&shca->ib_device, "Cannot create internal PD.");
626 ret = PTR_ERR(ibpd);
627 goto probe4;
628 }
629
630 shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
631 shca->pd->ib_pd.device = &shca->ib_device;
632
633 /* create internal max MR */
634 ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
635
636 if (ret) {
637 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%x",
638 ret);
639 goto probe5;
640 }
641
642 ret = ib_register_device(&shca->ib_device);
643 if (ret) {
644 ehca_err(&shca->ib_device,
645 "ib_register_device() failed ret=%x", ret);
646 goto probe6;
647 }
648
649 /* create AQP1 for port 1 */
650 if (ehca_open_aqp1 == 1) {
651 shca->sport[0].port_state = IB_PORT_DOWN;
652 ret = ehca_create_aqp1(shca, 1);
653 if (ret) {
654 ehca_err(&shca->ib_device,
655 "Cannot create AQP1 for port 1.");
656 goto probe7;
657 }
658 }
659
660 /* create AQP1 for port 2 */
661 if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
662 shca->sport[1].port_state = IB_PORT_DOWN;
663 ret = ehca_create_aqp1(shca, 2);
664 if (ret) {
665 ehca_err(&shca->ib_device,
666 "Cannot create AQP1 for port 2.");
667 goto probe8;
668 }
669 }
670
671 ehca_create_device_sysfs(dev);
672
673 spin_lock(&shca_list_lock);
674 list_add(&shca->shca_list, &shca_list);
675 spin_unlock(&shca_list_lock);
676
677 return 0;
678
679 probe8:
680 ret = ehca_destroy_aqp1(&shca->sport[0]);
681 if (ret)
682 ehca_err(&shca->ib_device,
683 "Cannot destroy AQP1 for port 1. ret=%x", ret);
684
685 probe7:
686 ib_unregister_device(&shca->ib_device);
687
688 probe6:
689 ret = ehca_dereg_internal_maxmr(shca);
690 if (ret)
691 ehca_err(&shca->ib_device,
692 "Cannot destroy internal MR. ret=%x", ret);
693
694 probe5:
695 ret = ehca_dealloc_pd(&shca->pd->ib_pd);
696 if (ret)
697 ehca_err(&shca->ib_device,
698 "Cannot destroy internal PD. ret=%x", ret);
699
700 probe4:
701 ret = ehca_destroy_eq(shca, &shca->neq);
702 if (ret)
703 ehca_err(&shca->ib_device,
704 "Cannot destroy NEQ. ret=%x", ret);
705
706 probe3:
707 ret = ehca_destroy_eq(shca, &shca->eq);
708 if (ret)
709 ehca_err(&shca->ib_device,
710 "Cannot destroy EQ. ret=%x", ret);
711
712 probe1:
713 ib_dealloc_device(&shca->ib_device);
714
715 return -EINVAL;
716 }
717
718 static int __devexit ehca_remove(struct ibmebus_dev *dev)
719 {
720 struct ehca_shca *shca = dev->ofdev.dev.driver_data;
721 int ret;
722
723 ehca_remove_device_sysfs(dev);
724
725 if (ehca_open_aqp1 == 1) {
726 int i;
727 for (i = 0; i < shca->num_ports; i++) {
728 ret = ehca_destroy_aqp1(&shca->sport[i]);
729 if (ret)
730 ehca_err(&shca->ib_device,
731 "Cannot destroy AQP1 for port %x "
732 "ret=%x", ret, i);
733 }
734 }
735
736 ib_unregister_device(&shca->ib_device);
737
738 ret = ehca_dereg_internal_maxmr(shca);
739 if (ret)
740 ehca_err(&shca->ib_device,
741 "Cannot destroy internal MR. ret=%x", ret);
742
743 ret = ehca_dealloc_pd(&shca->pd->ib_pd);
744 if (ret)
745 ehca_err(&shca->ib_device,
746 "Cannot destroy internal PD. ret=%x", ret);
747
748 ret = ehca_destroy_eq(shca, &shca->eq);
749 if (ret)
750 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%x", ret);
751
752 ret = ehca_destroy_eq(shca, &shca->neq);
753 if (ret)
754 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%x", ret);
755
756 ib_dealloc_device(&shca->ib_device);
757
758 spin_lock(&shca_list_lock);
759 list_del(&shca->shca_list);
760 spin_unlock(&shca_list_lock);
761
762 return ret;
763 }
764
765 static struct of_device_id ehca_device_table[] =
766 {
767 {
768 .name = "lhca",
769 .compatible = "IBM,lhca",
770 },
771 {},
772 };
773
774 static struct ibmebus_driver ehca_driver = {
775 .name = "ehca",
776 .id_table = ehca_device_table,
777 .probe = ehca_probe,
778 .remove = ehca_remove,
779 };
780
781 void ehca_poll_eqs(unsigned long data)
782 {
783 struct ehca_shca *shca;
784
785 spin_lock(&shca_list_lock);
786 list_for_each_entry(shca, &shca_list, shca_list) {
787 if (shca->eq.is_initialized) {
788 /* call deadman proc only if eq ptr does not change */
789 struct ehca_eq *eq = &shca->eq;
790 int max = 3;
791 volatile u64 q_ofs, q_ofs2;
792 u64 flags;
793 spin_lock_irqsave(&eq->spinlock, flags);
794 q_ofs = eq->ipz_queue.current_q_offset;
795 spin_unlock_irqrestore(&eq->spinlock, flags);
796 do {
797 spin_lock_irqsave(&eq->spinlock, flags);
798 q_ofs2 = eq->ipz_queue.current_q_offset;
799 spin_unlock_irqrestore(&eq->spinlock, flags);
800 max--;
801 } while (q_ofs == q_ofs2 && max > 0);
802 if (q_ofs == q_ofs2)
803 ehca_process_eq(shca, 0);
804 }
805 }
806 mod_timer(&poll_eqs_timer, jiffies + HZ);
807 spin_unlock(&shca_list_lock);
808 }
809
810 int __init ehca_module_init(void)
811 {
812 int ret;
813
814 printk(KERN_INFO "eHCA Infiniband Device Driver "
815 "(Rel.: SVNEHCA_0022)\n");
816 idr_init(&ehca_qp_idr);
817 idr_init(&ehca_cq_idr);
818 spin_lock_init(&ehca_qp_idr_lock);
819 spin_lock_init(&ehca_cq_idr_lock);
820
821 INIT_LIST_HEAD(&shca_list);
822 spin_lock_init(&shca_list_lock);
823
824 if ((ret = ehca_create_comp_pool())) {
825 ehca_gen_err("Cannot create comp pool.");
826 return ret;
827 }
828
829 if ((ret = ehca_create_slab_caches())) {
830 ehca_gen_err("Cannot create SLAB caches");
831 ret = -ENOMEM;
832 goto module_init1;
833 }
834
835 if ((ret = ibmebus_register_driver(&ehca_driver))) {
836 ehca_gen_err("Cannot register eHCA device driver");
837 ret = -EINVAL;
838 goto module_init2;
839 }
840
841 ehca_create_driver_sysfs(&ehca_driver);
842
843 if (ehca_poll_all_eqs != 1) {
844 ehca_gen_err("WARNING!!!");
845 ehca_gen_err("It is possible to lose interrupts.");
846 } else {
847 init_timer(&poll_eqs_timer);
848 poll_eqs_timer.function = ehca_poll_eqs;
849 poll_eqs_timer.expires = jiffies + HZ;
850 add_timer(&poll_eqs_timer);
851 }
852
853 return 0;
854
855 module_init2:
856 ehca_destroy_slab_caches();
857
858 module_init1:
859 ehca_destroy_comp_pool();
860 return ret;
861 };
862
863 void __exit ehca_module_exit(void)
864 {
865 if (ehca_poll_all_eqs == 1)
866 del_timer_sync(&poll_eqs_timer);
867
868 ehca_remove_driver_sysfs(&ehca_driver);
869 ibmebus_unregister_driver(&ehca_driver);
870
871 ehca_destroy_slab_caches();
872
873 ehca_destroy_comp_pool();
874
875 idr_destroy(&ehca_cq_idr);
876 idr_destroy(&ehca_qp_idr);
877 };
878
879 module_init(ehca_module_init);
880 module_exit(ehca_module_exit);
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