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KVM: s390: arch backend for the kvm kernel module
[linux-2.6/openmoko-kernel/knife-kernel.git] / drivers / infiniband / hw / ehca / ehca_main.c
blob65b3362cdb9b5a82321ce56ebaf71d3ce6b3ca4c
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 "0025"
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 static int ehca_mr_largepage = 1;
64
65 int ehca_debug_level = 0;
66 int ehca_nr_ports = 2;
67 int ehca_use_hp_mr = 0;
68 int ehca_port_act_time = 30;
69 int ehca_static_rate = -1;
70 int ehca_scaling_code = 0;
71 int ehca_lock_hcalls = -1;
72
73 module_param_named(open_aqp1, ehca_open_aqp1, int, S_IRUGO);
74 module_param_named(debug_level, ehca_debug_level, int, S_IRUGO);
75 module_param_named(hw_level, ehca_hw_level, int, S_IRUGO);
76 module_param_named(nr_ports, ehca_nr_ports, int, S_IRUGO);
77 module_param_named(use_hp_mr, ehca_use_hp_mr, int, S_IRUGO);
78 module_param_named(port_act_time, ehca_port_act_time, int, S_IRUGO);
79 module_param_named(poll_all_eqs, ehca_poll_all_eqs, int, S_IRUGO);
80 module_param_named(static_rate, ehca_static_rate, int, S_IRUGO);
81 module_param_named(scaling_code, ehca_scaling_code, int, S_IRUGO);
82 module_param_named(mr_largepage, ehca_mr_largepage, int, S_IRUGO);
83 module_param_named(lock_hcalls, ehca_lock_hcalls, bool, S_IRUGO);
84
85 MODULE_PARM_DESC(open_aqp1,
86 "AQP1 on startup (0: no (default), 1: yes)");
87 MODULE_PARM_DESC(debug_level,
88 "debug level"
89 " (0: no debug traces (default), 1: with debug traces)");
90 MODULE_PARM_DESC(hw_level,
91 "hardware level"
92 " (0: autosensing (default), 1: v. 0.20, 2: v. 0.21)");
93 MODULE_PARM_DESC(nr_ports,
94 "number of connected ports (-1: autodetect, 1: port one only, "
95 "2: two ports (default)");
96 MODULE_PARM_DESC(use_hp_mr,
97 "high performance MRs (0: no (default), 1: yes)");
98 MODULE_PARM_DESC(port_act_time,
99 "time to wait for port activation (default: 30 sec)");
100 MODULE_PARM_DESC(poll_all_eqs,
101 "polls all event queues periodically"
102 " (0: no, 1: yes (default))");
103 MODULE_PARM_DESC(static_rate,
104 "set permanent static rate (default: disabled)");
105 MODULE_PARM_DESC(scaling_code,
106 "set scaling code (0: disabled/default, 1: enabled)");
107 MODULE_PARM_DESC(mr_largepage,
108 "use large page for MR (0: use PAGE_SIZE (default), "
109 "1: use large page depending on MR size");
110 MODULE_PARM_DESC(lock_hcalls,
111 "serialize all hCalls made by the driver "
112 "(default: autodetect)");
113
114 DEFINE_RWLOCK(ehca_qp_idr_lock);
115 DEFINE_RWLOCK(ehca_cq_idr_lock);
116 DEFINE_IDR(ehca_qp_idr);
117 DEFINE_IDR(ehca_cq_idr);
118
119 static LIST_HEAD(shca_list); /* list of all registered ehcas */
120 static DEFINE_SPINLOCK(shca_list_lock);
121
122 static struct timer_list poll_eqs_timer;
123
124 #ifdef CONFIG_PPC_64K_PAGES
125 static struct kmem_cache *ctblk_cache;
126
127 void *ehca_alloc_fw_ctrlblock(gfp_t flags)
128 {
129 void *ret = kmem_cache_zalloc(ctblk_cache, flags);
130 if (!ret)
131 ehca_gen_err("Out of memory for ctblk");
132 return ret;
133 }
134
135 void ehca_free_fw_ctrlblock(void *ptr)
136 {
137 if (ptr)
138 kmem_cache_free(ctblk_cache, ptr);
139
140 }
141 #endif
142
143 int ehca2ib_return_code(u64 ehca_rc)
144 {
145 switch (ehca_rc) {
146 case H_SUCCESS:
147 return 0;
148 case H_RESOURCE: /* Resource in use */
149 case H_BUSY:
150 return -EBUSY;
151 case H_NOT_ENOUGH_RESOURCES: /* insufficient resources */
152 case H_CONSTRAINED: /* resource constraint */
153 case H_NO_MEM:
154 return -ENOMEM;
155 default:
156 return -EINVAL;
157 }
158 }
159
160 static int ehca_create_slab_caches(void)
161 {
162 int ret;
163
164 ret = ehca_init_pd_cache();
165 if (ret) {
166 ehca_gen_err("Cannot create PD SLAB cache.");
167 return ret;
168 }
169
170 ret = ehca_init_cq_cache();
171 if (ret) {
172 ehca_gen_err("Cannot create CQ SLAB cache.");
173 goto create_slab_caches2;
174 }
175
176 ret = ehca_init_qp_cache();
177 if (ret) {
178 ehca_gen_err("Cannot create QP SLAB cache.");
179 goto create_slab_caches3;
180 }
181
182 ret = ehca_init_av_cache();
183 if (ret) {
184 ehca_gen_err("Cannot create AV SLAB cache.");
185 goto create_slab_caches4;
186 }
187
188 ret = ehca_init_mrmw_cache();
189 if (ret) {
190 ehca_gen_err("Cannot create MR&MW SLAB cache.");
191 goto create_slab_caches5;
192 }
193
194 ret = ehca_init_small_qp_cache();
195 if (ret) {
196 ehca_gen_err("Cannot create small queue SLAB cache.");
197 goto create_slab_caches6;
198 }
199
200 #ifdef CONFIG_PPC_64K_PAGES
201 ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
202 EHCA_PAGESIZE, H_CB_ALIGNMENT,
203 SLAB_HWCACHE_ALIGN,
204 NULL);
205 if (!ctblk_cache) {
206 ehca_gen_err("Cannot create ctblk SLAB cache.");
207 ehca_cleanup_small_qp_cache();
208 goto create_slab_caches6;
209 }
210 #endif
211 return 0;
212
213 create_slab_caches6:
214 ehca_cleanup_mrmw_cache();
215
216 create_slab_caches5:
217 ehca_cleanup_av_cache();
218
219 create_slab_caches4:
220 ehca_cleanup_qp_cache();
221
222 create_slab_caches3:
223 ehca_cleanup_cq_cache();
224
225 create_slab_caches2:
226 ehca_cleanup_pd_cache();
227
228 return ret;
229 }
230
231 static void ehca_destroy_slab_caches(void)
232 {
233 ehca_cleanup_small_qp_cache();
234 ehca_cleanup_mrmw_cache();
235 ehca_cleanup_av_cache();
236 ehca_cleanup_qp_cache();
237 ehca_cleanup_cq_cache();
238 ehca_cleanup_pd_cache();
239 #ifdef CONFIG_PPC_64K_PAGES
240 if (ctblk_cache)
241 kmem_cache_destroy(ctblk_cache);
242 #endif
243 }
244
245 #define EHCA_HCAAVER EHCA_BMASK_IBM(32, 39)
246 #define EHCA_REVID EHCA_BMASK_IBM(40, 63)
247
248 static struct cap_descr {
249 u64 mask;
250 char *descr;
251 } hca_cap_descr[] = {
252 { HCA_CAP_AH_PORT_NR_CHECK, "HCA_CAP_AH_PORT_NR_CHECK" },
253 { HCA_CAP_ATOMIC, "HCA_CAP_ATOMIC" },
254 { HCA_CAP_AUTO_PATH_MIG, "HCA_CAP_AUTO_PATH_MIG" },
255 { HCA_CAP_BAD_P_KEY_CTR, "HCA_CAP_BAD_P_KEY_CTR" },
256 { HCA_CAP_SQD_RTS_PORT_CHANGE, "HCA_CAP_SQD_RTS_PORT_CHANGE" },
257 { HCA_CAP_CUR_QP_STATE_MOD, "HCA_CAP_CUR_QP_STATE_MOD" },
258 { HCA_CAP_INIT_TYPE, "HCA_CAP_INIT_TYPE" },
259 { HCA_CAP_PORT_ACTIVE_EVENT, "HCA_CAP_PORT_ACTIVE_EVENT" },
260 { HCA_CAP_Q_KEY_VIOL_CTR, "HCA_CAP_Q_KEY_VIOL_CTR" },
261 { HCA_CAP_WQE_RESIZE, "HCA_CAP_WQE_RESIZE" },
262 { HCA_CAP_RAW_PACKET_MCAST, "HCA_CAP_RAW_PACKET_MCAST" },
263 { HCA_CAP_SHUTDOWN_PORT, "HCA_CAP_SHUTDOWN_PORT" },
264 { HCA_CAP_RC_LL_QP, "HCA_CAP_RC_LL_QP" },
265 { HCA_CAP_SRQ, "HCA_CAP_SRQ" },
266 { HCA_CAP_UD_LL_QP, "HCA_CAP_UD_LL_QP" },
267 { HCA_CAP_RESIZE_MR, "HCA_CAP_RESIZE_MR" },
268 { HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" },
269 { HCA_CAP_H_ALLOC_RES_SYNC, "HCA_CAP_H_ALLOC_RES_SYNC" },
270 };
271
272 static int ehca_sense_attributes(struct ehca_shca *shca)
273 {
274 int i, ret = 0;
275 u64 h_ret;
276 struct hipz_query_hca *rblock;
277 struct hipz_query_port *port;
278
279 static const u32 pgsize_map[] = {
280 HCA_CAP_MR_PGSIZE_4K, 0x1000,
281 HCA_CAP_MR_PGSIZE_64K, 0x10000,
282 HCA_CAP_MR_PGSIZE_1M, 0x100000,
283 HCA_CAP_MR_PGSIZE_16M, 0x1000000,
284 };
285
286 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
287 if (!rblock) {
288 ehca_gen_err("Cannot allocate rblock memory.");
289 return -ENOMEM;
290 }
291
292 h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
293 if (h_ret != H_SUCCESS) {
294 ehca_gen_err("Cannot query device properties. h_ret=%li",
295 h_ret);
296 ret = -EPERM;
297 goto sense_attributes1;
298 }
299
300 if (ehca_nr_ports == 1)
301 shca->num_ports = 1;
302 else
303 shca->num_ports = (u8)rblock->num_ports;
304
305 ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
306
307 if (ehca_hw_level == 0) {
308 u32 hcaaver;
309 u32 revid;
310
311 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
312 revid = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
313
314 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
315
316 if (hcaaver == 1) {
317 if (revid <= 3)
318 shca->hw_level = 0x10 | (revid + 1);
319 else
320 shca->hw_level = 0x14;
321 } else if (hcaaver == 2) {
322 if (revid == 0)
323 shca->hw_level = 0x21;
324 else if (revid == 0x10)
325 shca->hw_level = 0x22;
326 else if (revid == 0x20 || revid == 0x21)
327 shca->hw_level = 0x23;
328 }
329
330 if (!shca->hw_level) {
331 ehca_gen_warn("unknown hardware version"
332 " - assuming default level");
333 shca->hw_level = 0x22;
334 }
335 } else
336 shca->hw_level = ehca_hw_level;
337 ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
338
339 shca->hca_cap = rblock->hca_cap_indicators;
340 ehca_gen_dbg(" ... HCA capabilities:");
341 for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
342 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
343 ehca_gen_dbg(" %s", hca_cap_descr[i].descr);
344
345 /* Autodetect hCall locking -- the "H_ALLOC_RESOURCE synced" flag is
346 * a firmware property, so it's valid across all adapters
347 */
348 if (ehca_lock_hcalls == -1)
349 ehca_lock_hcalls = !(shca->hca_cap & HCA_CAP_H_ALLOC_RES_SYNC);
350
351 /* translate supported MR page sizes; always support 4K */
352 shca->hca_cap_mr_pgsize = EHCA_PAGESIZE;
353 if (ehca_mr_largepage) { /* support extra sizes only if enabled */
354 for (i = 0; i < ARRAY_SIZE(pgsize_map); i += 2)
355 if (rblock->memory_page_size_supported & pgsize_map[i])
356 shca->hca_cap_mr_pgsize |= pgsize_map[i + 1];
357 }
358
359 /* query max MTU from first port -- it's the same for all ports */
360 port = (struct hipz_query_port *)rblock;
361 h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
362 if (h_ret != H_SUCCESS) {
363 ehca_gen_err("Cannot query port properties. h_ret=%li",
364 h_ret);
365 ret = -EPERM;
366 goto sense_attributes1;
367 }
368
369 shca->max_mtu = port->max_mtu;
370
371 sense_attributes1:
372 ehca_free_fw_ctrlblock(rblock);
373 return ret;
374 }
375
376 static int init_node_guid(struct ehca_shca *shca)
377 {
378 int ret = 0;
379 struct hipz_query_hca *rblock;
380
381 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
382 if (!rblock) {
383 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
384 return -ENOMEM;
385 }
386
387 if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
388 ehca_err(&shca->ib_device, "Can't query device properties");
389 ret = -EINVAL;
390 goto init_node_guid1;
391 }
392
393 memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
394
395 init_node_guid1:
396 ehca_free_fw_ctrlblock(rblock);
397 return ret;
398 }
399
400 static int ehca_init_device(struct ehca_shca *shca)
401 {
402 int ret;
403
404 ret = init_node_guid(shca);
405 if (ret)
406 return ret;
407
408 strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
409 shca->ib_device.owner = THIS_MODULE;
410
411 shca->ib_device.uverbs_abi_ver = 8;
412 shca->ib_device.uverbs_cmd_mask =
413 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
414 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
415 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
416 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
417 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
418 (1ull << IB_USER_VERBS_CMD_REG_MR) |
419 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
420 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
421 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
422 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
423 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
424 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
425 (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
426 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
427 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) |
428 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
429
430 shca->ib_device.node_type = RDMA_NODE_IB_CA;
431 shca->ib_device.phys_port_cnt = shca->num_ports;
432 shca->ib_device.num_comp_vectors = 1;
433 shca->ib_device.dma_device = &shca->ofdev->dev;
434 shca->ib_device.query_device = ehca_query_device;
435 shca->ib_device.query_port = ehca_query_port;
436 shca->ib_device.query_gid = ehca_query_gid;
437 shca->ib_device.query_pkey = ehca_query_pkey;
438 /* shca->in_device.modify_device = ehca_modify_device */
439 shca->ib_device.modify_port = ehca_modify_port;
440 shca->ib_device.alloc_ucontext = ehca_alloc_ucontext;
441 shca->ib_device.dealloc_ucontext = ehca_dealloc_ucontext;
442 shca->ib_device.alloc_pd = ehca_alloc_pd;
443 shca->ib_device.dealloc_pd = ehca_dealloc_pd;
444 shca->ib_device.create_ah = ehca_create_ah;
445 /* shca->ib_device.modify_ah = ehca_modify_ah; */
446 shca->ib_device.query_ah = ehca_query_ah;
447 shca->ib_device.destroy_ah = ehca_destroy_ah;
448 shca->ib_device.create_qp = ehca_create_qp;
449 shca->ib_device.modify_qp = ehca_modify_qp;
450 shca->ib_device.query_qp = ehca_query_qp;
451 shca->ib_device.destroy_qp = ehca_destroy_qp;
452 shca->ib_device.post_send = ehca_post_send;
453 shca->ib_device.post_recv = ehca_post_recv;
454 shca->ib_device.create_cq = ehca_create_cq;
455 shca->ib_device.destroy_cq = ehca_destroy_cq;
456 shca->ib_device.resize_cq = ehca_resize_cq;
457 shca->ib_device.poll_cq = ehca_poll_cq;
458 /* shca->ib_device.peek_cq = ehca_peek_cq; */
459 shca->ib_device.req_notify_cq = ehca_req_notify_cq;
460 /* shca->ib_device.req_ncomp_notif = ehca_req_ncomp_notif; */
461 shca->ib_device.get_dma_mr = ehca_get_dma_mr;
462 shca->ib_device.reg_phys_mr = ehca_reg_phys_mr;
463 shca->ib_device.reg_user_mr = ehca_reg_user_mr;
464 shca->ib_device.query_mr = ehca_query_mr;
465 shca->ib_device.dereg_mr = ehca_dereg_mr;
466 shca->ib_device.rereg_phys_mr = ehca_rereg_phys_mr;
467 shca->ib_device.alloc_mw = ehca_alloc_mw;
468 shca->ib_device.bind_mw = ehca_bind_mw;
469 shca->ib_device.dealloc_mw = ehca_dealloc_mw;
470 shca->ib_device.alloc_fmr = ehca_alloc_fmr;
471 shca->ib_device.map_phys_fmr = ehca_map_phys_fmr;
472 shca->ib_device.unmap_fmr = ehca_unmap_fmr;
473 shca->ib_device.dealloc_fmr = ehca_dealloc_fmr;
474 shca->ib_device.attach_mcast = ehca_attach_mcast;
475 shca->ib_device.detach_mcast = ehca_detach_mcast;
476 shca->ib_device.process_mad = ehca_process_mad;
477 shca->ib_device.mmap = ehca_mmap;
478
479 if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
480 shca->ib_device.uverbs_cmd_mask |=
481 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
482 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
483 (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
484 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
485
486 shca->ib_device.create_srq = ehca_create_srq;
487 shca->ib_device.modify_srq = ehca_modify_srq;
488 shca->ib_device.query_srq = ehca_query_srq;
489 shca->ib_device.destroy_srq = ehca_destroy_srq;
490 shca->ib_device.post_srq_recv = ehca_post_srq_recv;
491 }
492
493 return ret;
494 }
495
496 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
497 {
498 struct ehca_sport *sport = &shca->sport[port - 1];
499 struct ib_cq *ibcq;
500 struct ib_qp *ibqp;
501 struct ib_qp_init_attr qp_init_attr;
502 int ret;
503
504 if (sport->ibcq_aqp1) {
505 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
506 return -EPERM;
507 }
508
509 ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void *)(-1), 10, 0);
510 if (IS_ERR(ibcq)) {
511 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
512 return PTR_ERR(ibcq);
513 }
514 sport->ibcq_aqp1 = ibcq;
515
516 if (sport->ibqp_sqp[IB_QPT_GSI]) {
517 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
518 ret = -EPERM;
519 goto create_aqp1;
520 }
521
522 memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
523 qp_init_attr.send_cq = ibcq;
524 qp_init_attr.recv_cq = ibcq;
525 qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
526 qp_init_attr.cap.max_send_wr = 100;
527 qp_init_attr.cap.max_recv_wr = 100;
528 qp_init_attr.cap.max_send_sge = 2;
529 qp_init_attr.cap.max_recv_sge = 1;
530 qp_init_attr.qp_type = IB_QPT_GSI;
531 qp_init_attr.port_num = port;
532 qp_init_attr.qp_context = NULL;
533 qp_init_attr.event_handler = NULL;
534 qp_init_attr.srq = NULL;
535
536 ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
537 if (IS_ERR(ibqp)) {
538 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
539 ret = PTR_ERR(ibqp);
540 goto create_aqp1;
541 }
542 sport->ibqp_sqp[IB_QPT_GSI] = ibqp;
543
544 return 0;
545
546 create_aqp1:
547 ib_destroy_cq(sport->ibcq_aqp1);
548 return ret;
549 }
550
551 static int ehca_destroy_aqp1(struct ehca_sport *sport)
552 {
553 int ret;
554
555 ret = ib_destroy_qp(sport->ibqp_sqp[IB_QPT_GSI]);
556 if (ret) {
557 ehca_gen_err("Cannot destroy AQP1 QP. ret=%i", ret);
558 return ret;
559 }
560
561 ret = ib_destroy_cq(sport->ibcq_aqp1);
562 if (ret)
563 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%i", ret);
564
565 return ret;
566 }
567
568 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
569 {
570 return snprintf(buf, PAGE_SIZE, "%d\n",
571 ehca_debug_level);
572 }
573
574 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
575 const char *buf, size_t count)
576 {
577 int value = (*buf) - '0';
578 if (value >= 0 && value <= 9)
579 ehca_debug_level = value;
580 return 1;
581 }
582
583 static DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
584 ehca_show_debug_level, ehca_store_debug_level);
585
586 static struct attribute *ehca_drv_attrs[] = {
587 &driver_attr_debug_level.attr,
588 NULL
589 };
590
591 static struct attribute_group ehca_drv_attr_grp = {
592 .attrs = ehca_drv_attrs
593 };
594
595 static struct attribute_group *ehca_drv_attr_groups[] = {
596 &ehca_drv_attr_grp,
597 NULL,
598 };
599
600 #define EHCA_RESOURCE_ATTR(name) \
601 static ssize_t ehca_show_##name(struct device *dev, \
602 struct device_attribute *attr, \
603 char *buf) \
604 { \
605 struct ehca_shca *shca; \
606 struct hipz_query_hca *rblock; \
607 int data; \
608 \
609 shca = dev->driver_data; \
610 \
611 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL); \
612 if (!rblock) { \
613 dev_err(dev, "Can't allocate rblock memory.\n"); \
614 return 0; \
615 } \
616 \
617 if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
618 dev_err(dev, "Can't query device properties\n"); \
619 ehca_free_fw_ctrlblock(rblock); \
620 return 0; \
621 } \
622 \
623 data = rblock->name; \
624 ehca_free_fw_ctrlblock(rblock); \
625 \
626 if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1)) \
627 return snprintf(buf, 256, "1\n"); \
628 else \
629 return snprintf(buf, 256, "%d\n", data); \
630 \
631 } \
632 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
633
634 EHCA_RESOURCE_ATTR(num_ports);
635 EHCA_RESOURCE_ATTR(hw_ver);
636 EHCA_RESOURCE_ATTR(max_eq);
637 EHCA_RESOURCE_ATTR(cur_eq);
638 EHCA_RESOURCE_ATTR(max_cq);
639 EHCA_RESOURCE_ATTR(cur_cq);
640 EHCA_RESOURCE_ATTR(max_qp);
641 EHCA_RESOURCE_ATTR(cur_qp);
642 EHCA_RESOURCE_ATTR(max_mr);
643 EHCA_RESOURCE_ATTR(cur_mr);
644 EHCA_RESOURCE_ATTR(max_mw);
645 EHCA_RESOURCE_ATTR(cur_mw);
646 EHCA_RESOURCE_ATTR(max_pd);
647 EHCA_RESOURCE_ATTR(max_ah);
648
649 static ssize_t ehca_show_adapter_handle(struct device *dev,
650 struct device_attribute *attr,
651 char *buf)
652 {
653 struct ehca_shca *shca = dev->driver_data;
654
655 return sprintf(buf, "%lx\n", shca->ipz_hca_handle.handle);
656
657 }
658 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
659
660 static ssize_t ehca_show_mr_largepage(struct device *dev,
661 struct device_attribute *attr,
662 char *buf)
663 {
664 return sprintf(buf, "%d\n", ehca_mr_largepage);
665 }
666 static DEVICE_ATTR(mr_largepage, S_IRUGO, ehca_show_mr_largepage, NULL);
667
668 static struct attribute *ehca_dev_attrs[] = {
669 &dev_attr_adapter_handle.attr,
670 &dev_attr_num_ports.attr,
671 &dev_attr_hw_ver.attr,
672 &dev_attr_max_eq.attr,
673 &dev_attr_cur_eq.attr,
674 &dev_attr_max_cq.attr,
675 &dev_attr_cur_cq.attr,
676 &dev_attr_max_qp.attr,
677 &dev_attr_cur_qp.attr,
678 &dev_attr_max_mr.attr,
679 &dev_attr_cur_mr.attr,
680 &dev_attr_max_mw.attr,
681 &dev_attr_cur_mw.attr,
682 &dev_attr_max_pd.attr,
683 &dev_attr_max_ah.attr,
684 &dev_attr_mr_largepage.attr,
685 NULL
686 };
687
688 static struct attribute_group ehca_dev_attr_grp = {
689 .attrs = ehca_dev_attrs
690 };
691
692 static int __devinit ehca_probe(struct of_device *dev,
693 const struct of_device_id *id)
694 {
695 struct ehca_shca *shca;
696 const u64 *handle;
697 struct ib_pd *ibpd;
698 int ret, i;
699
700 handle = of_get_property(dev->node, "ibm,hca-handle", NULL);
701 if (!handle) {
702 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
703 dev->node->full_name);
704 return -ENODEV;
705 }
706
707 if (!(*handle)) {
708 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
709 dev->node->full_name);
710 return -ENODEV;
711 }
712
713 shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
714 if (!shca) {
715 ehca_gen_err("Cannot allocate shca memory.");
716 return -ENOMEM;
717 }
718 mutex_init(&shca->modify_mutex);
719 for (i = 0; i < ARRAY_SIZE(shca->sport); i++)
720 spin_lock_init(&shca->sport[i].mod_sqp_lock);
721
722 shca->ofdev = dev;
723 shca->ipz_hca_handle.handle = *handle;
724 dev->dev.driver_data = shca;
725
726 ret = ehca_sense_attributes(shca);
727 if (ret < 0) {
728 ehca_gen_err("Cannot sense eHCA attributes.");
729 goto probe1;
730 }
731
732 ret = ehca_init_device(shca);
733 if (ret) {
734 ehca_gen_err("Cannot init ehca device struct");
735 goto probe1;
736 }
737
738 /* create event queues */
739 ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, 2048);
740 if (ret) {
741 ehca_err(&shca->ib_device, "Cannot create EQ.");
742 goto probe1;
743 }
744
745 ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
746 if (ret) {
747 ehca_err(&shca->ib_device, "Cannot create NEQ.");
748 goto probe3;
749 }
750
751 /* create internal protection domain */
752 ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL);
753 if (IS_ERR(ibpd)) {
754 ehca_err(&shca->ib_device, "Cannot create internal PD.");
755 ret = PTR_ERR(ibpd);
756 goto probe4;
757 }
758
759 shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
760 shca->pd->ib_pd.device = &shca->ib_device;
761
762 /* create internal max MR */
763 ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
764
765 if (ret) {
766 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%i",
767 ret);
768 goto probe5;
769 }
770
771 ret = ib_register_device(&shca->ib_device);
772 if (ret) {
773 ehca_err(&shca->ib_device,
774 "ib_register_device() failed ret=%i", ret);
775 goto probe6;
776 }
777
778 /* create AQP1 for port 1 */
779 if (ehca_open_aqp1 == 1) {
780 shca->sport[0].port_state = IB_PORT_DOWN;
781 ret = ehca_create_aqp1(shca, 1);
782 if (ret) {
783 ehca_err(&shca->ib_device,
784 "Cannot create AQP1 for port 1.");
785 goto probe7;
786 }
787 }
788
789 /* create AQP1 for port 2 */
790 if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
791 shca->sport[1].port_state = IB_PORT_DOWN;
792 ret = ehca_create_aqp1(shca, 2);
793 if (ret) {
794 ehca_err(&shca->ib_device,
795 "Cannot create AQP1 for port 2.");
796 goto probe8;
797 }
798 }
799
800 ret = sysfs_create_group(&dev->dev.kobj, &ehca_dev_attr_grp);
801 if (ret) /* only complain; we can live without attributes */
802 ehca_err(&shca->ib_device,
803 "Cannot create device attributes ret=%d", ret);
804
805 spin_lock(&shca_list_lock);
806 list_add(&shca->shca_list, &shca_list);
807 spin_unlock(&shca_list_lock);
808
809 return 0;
810
811 probe8:
812 ret = ehca_destroy_aqp1(&shca->sport[0]);
813 if (ret)
814 ehca_err(&shca->ib_device,
815 "Cannot destroy AQP1 for port 1. ret=%i", ret);
816
817 probe7:
818 ib_unregister_device(&shca->ib_device);
819
820 probe6:
821 ret = ehca_dereg_internal_maxmr(shca);
822 if (ret)
823 ehca_err(&shca->ib_device,
824 "Cannot destroy internal MR. ret=%x", ret);
825
826 probe5:
827 ret = ehca_dealloc_pd(&shca->pd->ib_pd);
828 if (ret)
829 ehca_err(&shca->ib_device,
830 "Cannot destroy internal PD. ret=%x", ret);
831
832 probe4:
833 ret = ehca_destroy_eq(shca, &shca->neq);
834 if (ret)
835 ehca_err(&shca->ib_device,
836 "Cannot destroy NEQ. ret=%x", ret);
837
838 probe3:
839 ret = ehca_destroy_eq(shca, &shca->eq);
840 if (ret)
841 ehca_err(&shca->ib_device,
842 "Cannot destroy EQ. ret=%x", ret);
843
844 probe1:
845 ib_dealloc_device(&shca->ib_device);
846
847 return -EINVAL;
848 }
849
850 static int __devexit ehca_remove(struct of_device *dev)
851 {
852 struct ehca_shca *shca = dev->dev.driver_data;
853 int ret;
854
855 sysfs_remove_group(&dev->dev.kobj, &ehca_dev_attr_grp);
856
857 if (ehca_open_aqp1 == 1) {
858 int i;
859 for (i = 0; i < shca->num_ports; i++) {
860 ret = ehca_destroy_aqp1(&shca->sport[i]);
861 if (ret)
862 ehca_err(&shca->ib_device,
863 "Cannot destroy AQP1 for port %x "
864 "ret=%i", ret, i);
865 }
866 }
867
868 ib_unregister_device(&shca->ib_device);
869
870 ret = ehca_dereg_internal_maxmr(shca);
871 if (ret)
872 ehca_err(&shca->ib_device,
873 "Cannot destroy internal MR. ret=%i", ret);
874
875 ret = ehca_dealloc_pd(&shca->pd->ib_pd);
876 if (ret)
877 ehca_err(&shca->ib_device,
878 "Cannot destroy internal PD. ret=%i", ret);
879
880 ret = ehca_destroy_eq(shca, &shca->eq);
881 if (ret)
882 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%i", ret);
883
884 ret = ehca_destroy_eq(shca, &shca->neq);
885 if (ret)
886 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%i", ret);
887
888 ib_dealloc_device(&shca->ib_device);
889
890 spin_lock(&shca_list_lock);
891 list_del(&shca->shca_list);
892 spin_unlock(&shca_list_lock);
893
894 return ret;
895 }
896
897 static struct of_device_id ehca_device_table[] =
898 {
899 {
900 .name = "lhca",
901 .compatible = "IBM,lhca",
902 },
903 {},
904 };
905
906 static struct of_platform_driver ehca_driver = {
907 .name = "ehca",
908 .match_table = ehca_device_table,
909 .probe = ehca_probe,
910 .remove = ehca_remove,
911 .driver = {
912 .groups = ehca_drv_attr_groups,
913 },
914 };
915
916 void ehca_poll_eqs(unsigned long data)
917 {
918 struct ehca_shca *shca;
919
920 spin_lock(&shca_list_lock);
921 list_for_each_entry(shca, &shca_list, shca_list) {
922 if (shca->eq.is_initialized) {
923 /* call deadman proc only if eq ptr does not change */
924 struct ehca_eq *eq = &shca->eq;
925 int max = 3;
926 volatile u64 q_ofs, q_ofs2;
927 u64 flags;
928 spin_lock_irqsave(&eq->spinlock, flags);
929 q_ofs = eq->ipz_queue.current_q_offset;
930 spin_unlock_irqrestore(&eq->spinlock, flags);
931 do {
932 spin_lock_irqsave(&eq->spinlock, flags);
933 q_ofs2 = eq->ipz_queue.current_q_offset;
934 spin_unlock_irqrestore(&eq->spinlock, flags);
935 max--;
936 } while (q_ofs == q_ofs2 && max > 0);
937 if (q_ofs == q_ofs2)
938 ehca_process_eq(shca, 0);
939 }
940 }
941 mod_timer(&poll_eqs_timer, round_jiffies(jiffies + HZ));
942 spin_unlock(&shca_list_lock);
943 }
944
945 static int __init ehca_module_init(void)
946 {
947 int ret;
948
949 printk(KERN_INFO "eHCA Infiniband Device Driver "
950 "(Version " HCAD_VERSION ")\n");
951
952 ret = ehca_create_comp_pool();
953 if (ret) {
954 ehca_gen_err("Cannot create comp pool.");
955 return ret;
956 }
957
958 ret = ehca_create_slab_caches();
959 if (ret) {
960 ehca_gen_err("Cannot create SLAB caches");
961 ret = -ENOMEM;
962 goto module_init1;
963 }
964
965 ret = ibmebus_register_driver(&ehca_driver);
966 if (ret) {
967 ehca_gen_err("Cannot register eHCA device driver");
968 ret = -EINVAL;
969 goto module_init2;
970 }
971
972 if (ehca_poll_all_eqs != 1) {
973 ehca_gen_err("WARNING!!!");
974 ehca_gen_err("It is possible to lose interrupts.");
975 } else {
976 init_timer(&poll_eqs_timer);
977 poll_eqs_timer.function = ehca_poll_eqs;
978 poll_eqs_timer.expires = jiffies + HZ;
979 add_timer(&poll_eqs_timer);
980 }
981
982 return 0;
983
984 module_init2:
985 ehca_destroy_slab_caches();
986
987 module_init1:
988 ehca_destroy_comp_pool();
989 return ret;
990 };
991
992 static void __exit ehca_module_exit(void)
993 {
994 if (ehca_poll_all_eqs == 1)
995 del_timer_sync(&poll_eqs_timer);
996
997 ibmebus_unregister_driver(&ehca_driver);
998
999 ehca_destroy_slab_caches();
1000
1001 ehca_destroy_comp_pool();
1002
1003 idr_destroy(&ehca_cq_idr);
1004 idr_destroy(&ehca_qp_idr);
1005 };
1006
1007 module_init(ehca_module_init);
1008 module_exit(ehca_module_exit);
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