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IB/core cleanup: Add const on args - device->process_mad
[deliverable/linux.git] / drivers / infiniband / hw / ehca / ehca_main.c
1 /*
2 * IBM eServer eHCA Infiniband device driver for Linux on POWER
3 *
4 * module start stop, hca detection
5 *
6 * Authors: Heiko J Schick <schickhj@de.ibm.com>
7 * Hoang-Nam Nguyen <hnguyen@de.ibm.com>
8 * Joachim Fenkes <fenkes@de.ibm.com>
9 *
10 * Copyright (c) 2005 IBM Corporation
11 *
12 * All rights reserved.
13 *
14 * This source code is distributed under a dual license of GPL v2.0 and OpenIB
15 * BSD.
16 *
17 * OpenIB BSD License
18 *
19 * Redistribution and use in source and binary forms, with or without
20 * modification, are permitted provided that the following conditions are met:
21 *
22 * Redistributions of source code must retain the above copyright notice, this
23 * list of conditions and the following disclaimer.
24 *
25 * Redistributions in binary form must reproduce the above copyright notice,
26 * this list of conditions and the following disclaimer in the documentation
27 * and/or other materials
28 * provided with the distribution.
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
31 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
34 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
35 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
36 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
37 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
38 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
39 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
40 * POSSIBILITY OF SUCH DAMAGE.
41 */
42
43 #ifdef CONFIG_PPC_64K_PAGES
44 #include <linux/slab.h>
45 #endif
46
47 #include <linux/notifier.h>
48 #include <linux/memory.h>
49 #include "ehca_classes.h"
50 #include "ehca_iverbs.h"
51 #include "ehca_mrmw.h"
52 #include "ehca_tools.h"
53 #include "hcp_if.h"
54
55 #define HCAD_VERSION "0029"
56
57 MODULE_LICENSE("Dual BSD/GPL");
58 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
59 MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver");
60 MODULE_VERSION(HCAD_VERSION);
61
62 static bool ehca_open_aqp1 = 0;
63 static int ehca_hw_level = 0;
64 static bool ehca_poll_all_eqs = 1;
65
66 int ehca_debug_level = 0;
67 int ehca_nr_ports = -1;
68 bool ehca_use_hp_mr = 0;
69 int ehca_port_act_time = 30;
70 int ehca_static_rate = -1;
71 bool 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, bint, S_IRUGO);
86 module_param_named(number_of_cqs, ehca_max_cq, int, S_IRUGO);
87 module_param_named(number_of_qps, ehca_max_qp, int, S_IRUGO);
88
89 MODULE_PARM_DESC(open_aqp1,
90 "Open AQP1 on startup (default: no)");
91 MODULE_PARM_DESC(debug_level,
92 "Amount of debug output (0: none (default), 1: traces, "
93 "2: some dumps, 3: lots)");
94 MODULE_PARM_DESC(hw_level,
95 "Hardware level (0: autosensing (default), "
96 "0x10..0x14: eHCA, 0x20..0x23: eHCA2)");
97 MODULE_PARM_DESC(nr_ports,
98 "number of connected ports (-1: autodetect (default), "
99 "1: port one only, 2: two ports)");
100 MODULE_PARM_DESC(use_hp_mr,
101 "Use high performance MRs (default: no)");
102 MODULE_PARM_DESC(port_act_time,
103 "Time to wait for port activation (default: 30 sec)");
104 MODULE_PARM_DESC(poll_all_eqs,
105 "Poll all event queues periodically (default: yes)");
106 MODULE_PARM_DESC(static_rate,
107 "Set permanent static rate (default: no static rate)");
108 MODULE_PARM_DESC(scaling_code,
109 "Enable scaling code (default: no)");
110 MODULE_PARM_DESC(lock_hcalls,
111 "Serialize all hCalls made by the driver "
112 "(default: autodetect)");
113 MODULE_PARM_DESC(number_of_cqs,
114 "Max number of CQs which can be allocated "
115 "(default: autodetect)");
116 MODULE_PARM_DESC(number_of_qps,
117 "Max number of QPs which can be allocated "
118 "(default: autodetect)");
119
120 DEFINE_RWLOCK(ehca_qp_idr_lock);
121 DEFINE_RWLOCK(ehca_cq_idr_lock);
122 DEFINE_IDR(ehca_qp_idr);
123 DEFINE_IDR(ehca_cq_idr);
124
125 static LIST_HEAD(shca_list); /* list of all registered ehcas */
126 DEFINE_SPINLOCK(shca_list_lock);
127
128 static struct timer_list poll_eqs_timer;
129
130 #ifdef CONFIG_PPC_64K_PAGES
131 static struct kmem_cache *ctblk_cache;
132
133 void *ehca_alloc_fw_ctrlblock(gfp_t flags)
134 {
135 void *ret = kmem_cache_zalloc(ctblk_cache, flags);
136 if (!ret)
137 ehca_gen_err("Out of memory for ctblk");
138 return ret;
139 }
140
141 void ehca_free_fw_ctrlblock(void *ptr)
142 {
143 if (ptr)
144 kmem_cache_free(ctblk_cache, ptr);
145
146 }
147 #endif
148
149 int ehca2ib_return_code(u64 ehca_rc)
150 {
151 switch (ehca_rc) {
152 case H_SUCCESS:
153 return 0;
154 case H_RESOURCE: /* Resource in use */
155 case H_BUSY:
156 return -EBUSY;
157 case H_NOT_ENOUGH_RESOURCES: /* insufficient resources */
158 case H_CONSTRAINED: /* resource constraint */
159 case H_NO_MEM:
160 return -ENOMEM;
161 default:
162 return -EINVAL;
163 }
164 }
165
166 static int ehca_create_slab_caches(void)
167 {
168 int ret;
169
170 ret = ehca_init_pd_cache();
171 if (ret) {
172 ehca_gen_err("Cannot create PD SLAB cache.");
173 return ret;
174 }
175
176 ret = ehca_init_cq_cache();
177 if (ret) {
178 ehca_gen_err("Cannot create CQ SLAB cache.");
179 goto create_slab_caches2;
180 }
181
182 ret = ehca_init_qp_cache();
183 if (ret) {
184 ehca_gen_err("Cannot create QP SLAB cache.");
185 goto create_slab_caches3;
186 }
187
188 ret = ehca_init_av_cache();
189 if (ret) {
190 ehca_gen_err("Cannot create AV SLAB cache.");
191 goto create_slab_caches4;
192 }
193
194 ret = ehca_init_mrmw_cache();
195 if (ret) {
196 ehca_gen_err("Cannot create MR&MW SLAB cache.");
197 goto create_slab_caches5;
198 }
199
200 ret = ehca_init_small_qp_cache();
201 if (ret) {
202 ehca_gen_err("Cannot create small queue SLAB cache.");
203 goto create_slab_caches6;
204 }
205
206 #ifdef CONFIG_PPC_64K_PAGES
207 ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
208 EHCA_PAGESIZE, H_CB_ALIGNMENT,
209 SLAB_HWCACHE_ALIGN,
210 NULL);
211 if (!ctblk_cache) {
212 ehca_gen_err("Cannot create ctblk SLAB cache.");
213 ehca_cleanup_small_qp_cache();
214 ret = -ENOMEM;
215 goto create_slab_caches6;
216 }
217 #endif
218 return 0;
219
220 create_slab_caches6:
221 ehca_cleanup_mrmw_cache();
222
223 create_slab_caches5:
224 ehca_cleanup_av_cache();
225
226 create_slab_caches4:
227 ehca_cleanup_qp_cache();
228
229 create_slab_caches3:
230 ehca_cleanup_cq_cache();
231
232 create_slab_caches2:
233 ehca_cleanup_pd_cache();
234
235 return ret;
236 }
237
238 static void ehca_destroy_slab_caches(void)
239 {
240 ehca_cleanup_small_qp_cache();
241 ehca_cleanup_mrmw_cache();
242 ehca_cleanup_av_cache();
243 ehca_cleanup_qp_cache();
244 ehca_cleanup_cq_cache();
245 ehca_cleanup_pd_cache();
246 #ifdef CONFIG_PPC_64K_PAGES
247 if (ctblk_cache)
248 kmem_cache_destroy(ctblk_cache);
249 #endif
250 }
251
252 #define EHCA_HCAAVER EHCA_BMASK_IBM(32, 39)
253 #define EHCA_REVID EHCA_BMASK_IBM(40, 63)
254
255 static struct cap_descr {
256 u64 mask;
257 char *descr;
258 } hca_cap_descr[] = {
259 { HCA_CAP_AH_PORT_NR_CHECK, "HCA_CAP_AH_PORT_NR_CHECK" },
260 { HCA_CAP_ATOMIC, "HCA_CAP_ATOMIC" },
261 { HCA_CAP_AUTO_PATH_MIG, "HCA_CAP_AUTO_PATH_MIG" },
262 { HCA_CAP_BAD_P_KEY_CTR, "HCA_CAP_BAD_P_KEY_CTR" },
263 { HCA_CAP_SQD_RTS_PORT_CHANGE, "HCA_CAP_SQD_RTS_PORT_CHANGE" },
264 { HCA_CAP_CUR_QP_STATE_MOD, "HCA_CAP_CUR_QP_STATE_MOD" },
265 { HCA_CAP_INIT_TYPE, "HCA_CAP_INIT_TYPE" },
266 { HCA_CAP_PORT_ACTIVE_EVENT, "HCA_CAP_PORT_ACTIVE_EVENT" },
267 { HCA_CAP_Q_KEY_VIOL_CTR, "HCA_CAP_Q_KEY_VIOL_CTR" },
268 { HCA_CAP_WQE_RESIZE, "HCA_CAP_WQE_RESIZE" },
269 { HCA_CAP_RAW_PACKET_MCAST, "HCA_CAP_RAW_PACKET_MCAST" },
270 { HCA_CAP_SHUTDOWN_PORT, "HCA_CAP_SHUTDOWN_PORT" },
271 { HCA_CAP_RC_LL_QP, "HCA_CAP_RC_LL_QP" },
272 { HCA_CAP_SRQ, "HCA_CAP_SRQ" },
273 { HCA_CAP_UD_LL_QP, "HCA_CAP_UD_LL_QP" },
274 { HCA_CAP_RESIZE_MR, "HCA_CAP_RESIZE_MR" },
275 { HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" },
276 { HCA_CAP_H_ALLOC_RES_SYNC, "HCA_CAP_H_ALLOC_RES_SYNC" },
277 };
278
279 static int ehca_sense_attributes(struct ehca_shca *shca)
280 {
281 int i, ret = 0;
282 u64 h_ret;
283 struct hipz_query_hca *rblock;
284 struct hipz_query_port *port;
285 const char *loc_code;
286
287 static const u32 pgsize_map[] = {
288 HCA_CAP_MR_PGSIZE_4K, 0x1000,
289 HCA_CAP_MR_PGSIZE_64K, 0x10000,
290 HCA_CAP_MR_PGSIZE_1M, 0x100000,
291 HCA_CAP_MR_PGSIZE_16M, 0x1000000,
292 };
293
294 ehca_gen_dbg("Probing adapter %s...",
295 shca->ofdev->dev.of_node->full_name);
296 loc_code = of_get_property(shca->ofdev->dev.of_node, "ibm,loc-code",
297 NULL);
298 if (loc_code)
299 ehca_gen_dbg(" ... location lode=%s", loc_code);
300
301 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
302 if (!rblock) {
303 ehca_gen_err("Cannot allocate rblock memory.");
304 return -ENOMEM;
305 }
306
307 h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
308 if (h_ret != H_SUCCESS) {
309 ehca_gen_err("Cannot query device properties. h_ret=%lli",
310 h_ret);
311 ret = -EPERM;
312 goto sense_attributes1;
313 }
314
315 if (ehca_nr_ports == 1)
316 shca->num_ports = 1;
317 else
318 shca->num_ports = (u8)rblock->num_ports;
319
320 ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
321
322 if (ehca_hw_level == 0) {
323 u32 hcaaver;
324 u32 revid;
325
326 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
327 revid = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
328
329 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
330
331 if (hcaaver == 1) {
332 if (revid <= 3)
333 shca->hw_level = 0x10 | (revid + 1);
334 else
335 shca->hw_level = 0x14;
336 } else if (hcaaver == 2) {
337 if (revid == 0)
338 shca->hw_level = 0x21;
339 else if (revid == 0x10)
340 shca->hw_level = 0x22;
341 else if (revid == 0x20 || revid == 0x21)
342 shca->hw_level = 0x23;
343 }
344
345 if (!shca->hw_level) {
346 ehca_gen_warn("unknown hardware version"
347 " - assuming default level");
348 shca->hw_level = 0x22;
349 }
350 } else
351 shca->hw_level = ehca_hw_level;
352 ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
353
354 shca->hca_cap = rblock->hca_cap_indicators;
355 ehca_gen_dbg(" ... HCA capabilities:");
356 for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
357 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
358 ehca_gen_dbg(" %s", hca_cap_descr[i].descr);
359
360 /* Autodetect hCall locking -- the "H_ALLOC_RESOURCE synced" flag is
361 * a firmware property, so it's valid across all adapters
362 */
363 if (ehca_lock_hcalls == -1)
364 ehca_lock_hcalls = !EHCA_BMASK_GET(HCA_CAP_H_ALLOC_RES_SYNC,
365 shca->hca_cap);
366
367 /* translate supported MR page sizes; always support 4K */
368 shca->hca_cap_mr_pgsize = EHCA_PAGESIZE;
369 for (i = 0; i < ARRAY_SIZE(pgsize_map); i += 2)
370 if (rblock->memory_page_size_supported & pgsize_map[i])
371 shca->hca_cap_mr_pgsize |= pgsize_map[i + 1];
372
373 /* Set maximum number of CQs and QPs to calculate EQ size */
374 if (shca->max_num_qps == -1)
375 shca->max_num_qps = min_t(int, rblock->max_qp,
376 EHCA_MAX_NUM_QUEUES);
377 else if (shca->max_num_qps < 1 || shca->max_num_qps > rblock->max_qp) {
378 ehca_gen_warn("The requested number of QPs is out of range "
379 "(1 - %i) specified by HW. Value is set to %i",
380 rblock->max_qp, rblock->max_qp);
381 shca->max_num_qps = rblock->max_qp;
382 }
383
384 if (shca->max_num_cqs == -1)
385 shca->max_num_cqs = min_t(int, rblock->max_cq,
386 EHCA_MAX_NUM_QUEUES);
387 else if (shca->max_num_cqs < 1 || shca->max_num_cqs > rblock->max_cq) {
388 ehca_gen_warn("The requested number of CQs is out of range "
389 "(1 - %i) specified by HW. Value is set to %i",
390 rblock->max_cq, rblock->max_cq);
391 }
392
393 /* query max MTU from first port -- it's the same for all ports */
394 port = (struct hipz_query_port *)rblock;
395 h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
396 if (h_ret != H_SUCCESS) {
397 ehca_gen_err("Cannot query port properties. h_ret=%lli",
398 h_ret);
399 ret = -EPERM;
400 goto sense_attributes1;
401 }
402
403 shca->max_mtu = port->max_mtu;
404
405 sense_attributes1:
406 ehca_free_fw_ctrlblock(rblock);
407 return ret;
408 }
409
410 static int init_node_guid(struct ehca_shca *shca)
411 {
412 int ret = 0;
413 struct hipz_query_hca *rblock;
414
415 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
416 if (!rblock) {
417 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
418 return -ENOMEM;
419 }
420
421 if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
422 ehca_err(&shca->ib_device, "Can't query device properties");
423 ret = -EINVAL;
424 goto init_node_guid1;
425 }
426
427 memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
428
429 init_node_guid1:
430 ehca_free_fw_ctrlblock(rblock);
431 return ret;
432 }
433
434 static int ehca_port_immutable(struct ib_device *ibdev, u8 port_num,
435 struct ib_port_immutable *immutable)
436 {
437 struct ib_port_attr attr;
438 int err;
439
440 err = ehca_query_port(ibdev, port_num, &attr);
441 if (err)
442 return err;
443
444 immutable->pkey_tbl_len = attr.pkey_tbl_len;
445 immutable->gid_tbl_len = attr.gid_tbl_len;
446 immutable->core_cap_flags = RDMA_CORE_PORT_IBA_IB;
447
448 return 0;
449 }
450
451 static int ehca_init_device(struct ehca_shca *shca)
452 {
453 int ret;
454
455 ret = init_node_guid(shca);
456 if (ret)
457 return ret;
458
459 strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
460 shca->ib_device.owner = THIS_MODULE;
461
462 shca->ib_device.uverbs_abi_ver = 8;
463 shca->ib_device.uverbs_cmd_mask =
464 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
465 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
466 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
467 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
468 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
469 (1ull << IB_USER_VERBS_CMD_REG_MR) |
470 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
471 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
472 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
473 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
474 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
475 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
476 (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
477 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
478 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) |
479 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
480
481 shca->ib_device.node_type = RDMA_NODE_IB_CA;
482 shca->ib_device.phys_port_cnt = shca->num_ports;
483 shca->ib_device.num_comp_vectors = 1;
484 shca->ib_device.dma_device = &shca->ofdev->dev;
485 shca->ib_device.query_device = ehca_query_device;
486 shca->ib_device.query_port = ehca_query_port;
487 shca->ib_device.query_gid = ehca_query_gid;
488 shca->ib_device.query_pkey = ehca_query_pkey;
489 /* shca->in_device.modify_device = ehca_modify_device */
490 shca->ib_device.modify_port = ehca_modify_port;
491 shca->ib_device.alloc_ucontext = ehca_alloc_ucontext;
492 shca->ib_device.dealloc_ucontext = ehca_dealloc_ucontext;
493 shca->ib_device.alloc_pd = ehca_alloc_pd;
494 shca->ib_device.dealloc_pd = ehca_dealloc_pd;
495 shca->ib_device.create_ah = ehca_create_ah;
496 /* shca->ib_device.modify_ah = ehca_modify_ah; */
497 shca->ib_device.query_ah = ehca_query_ah;
498 shca->ib_device.destroy_ah = ehca_destroy_ah;
499 shca->ib_device.create_qp = ehca_create_qp;
500 shca->ib_device.modify_qp = ehca_modify_qp;
501 shca->ib_device.query_qp = ehca_query_qp;
502 shca->ib_device.destroy_qp = ehca_destroy_qp;
503 shca->ib_device.post_send = ehca_post_send;
504 shca->ib_device.post_recv = ehca_post_recv;
505 shca->ib_device.create_cq = ehca_create_cq;
506 shca->ib_device.destroy_cq = ehca_destroy_cq;
507 shca->ib_device.resize_cq = ehca_resize_cq;
508 shca->ib_device.poll_cq = ehca_poll_cq;
509 /* shca->ib_device.peek_cq = ehca_peek_cq; */
510 shca->ib_device.req_notify_cq = ehca_req_notify_cq;
511 /* shca->ib_device.req_ncomp_notif = ehca_req_ncomp_notif; */
512 shca->ib_device.get_dma_mr = ehca_get_dma_mr;
513 shca->ib_device.reg_phys_mr = ehca_reg_phys_mr;
514 shca->ib_device.reg_user_mr = ehca_reg_user_mr;
515 shca->ib_device.query_mr = ehca_query_mr;
516 shca->ib_device.dereg_mr = ehca_dereg_mr;
517 shca->ib_device.rereg_phys_mr = ehca_rereg_phys_mr;
518 shca->ib_device.alloc_mw = ehca_alloc_mw;
519 shca->ib_device.bind_mw = ehca_bind_mw;
520 shca->ib_device.dealloc_mw = ehca_dealloc_mw;
521 shca->ib_device.alloc_fmr = ehca_alloc_fmr;
522 shca->ib_device.map_phys_fmr = ehca_map_phys_fmr;
523 shca->ib_device.unmap_fmr = ehca_unmap_fmr;
524 shca->ib_device.dealloc_fmr = ehca_dealloc_fmr;
525 shca->ib_device.attach_mcast = ehca_attach_mcast;
526 shca->ib_device.detach_mcast = ehca_detach_mcast;
527 shca->ib_device.process_mad = ehca_process_mad;
528 shca->ib_device.mmap = ehca_mmap;
529 shca->ib_device.dma_ops = &ehca_dma_mapping_ops;
530 shca->ib_device.get_port_immutable = ehca_port_immutable;
531
532 if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
533 shca->ib_device.uverbs_cmd_mask |=
534 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
535 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
536 (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
537 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
538
539 shca->ib_device.create_srq = ehca_create_srq;
540 shca->ib_device.modify_srq = ehca_modify_srq;
541 shca->ib_device.query_srq = ehca_query_srq;
542 shca->ib_device.destroy_srq = ehca_destroy_srq;
543 shca->ib_device.post_srq_recv = ehca_post_srq_recv;
544 }
545
546 return ret;
547 }
548
549 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
550 {
551 struct ehca_sport *sport = &shca->sport[port - 1];
552 struct ib_cq *ibcq;
553 struct ib_qp *ibqp;
554 struct ib_qp_init_attr qp_init_attr;
555 int ret;
556
557 if (sport->ibcq_aqp1) {
558 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
559 return -EPERM;
560 }
561
562 ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void *)(-1), 10, 0);
563 if (IS_ERR(ibcq)) {
564 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
565 return PTR_ERR(ibcq);
566 }
567 sport->ibcq_aqp1 = ibcq;
568
569 if (sport->ibqp_sqp[IB_QPT_GSI]) {
570 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
571 ret = -EPERM;
572 goto create_aqp1;
573 }
574
575 memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
576 qp_init_attr.send_cq = ibcq;
577 qp_init_attr.recv_cq = ibcq;
578 qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
579 qp_init_attr.cap.max_send_wr = 100;
580 qp_init_attr.cap.max_recv_wr = 100;
581 qp_init_attr.cap.max_send_sge = 2;
582 qp_init_attr.cap.max_recv_sge = 1;
583 qp_init_attr.qp_type = IB_QPT_GSI;
584 qp_init_attr.port_num = port;
585 qp_init_attr.qp_context = NULL;
586 qp_init_attr.event_handler = NULL;
587 qp_init_attr.srq = NULL;
588
589 ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
590 if (IS_ERR(ibqp)) {
591 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
592 ret = PTR_ERR(ibqp);
593 goto create_aqp1;
594 }
595 sport->ibqp_sqp[IB_QPT_GSI] = ibqp;
596
597 return 0;
598
599 create_aqp1:
600 ib_destroy_cq(sport->ibcq_aqp1);
601 return ret;
602 }
603
604 static int ehca_destroy_aqp1(struct ehca_sport *sport)
605 {
606 int ret;
607
608 ret = ib_destroy_qp(sport->ibqp_sqp[IB_QPT_GSI]);
609 if (ret) {
610 ehca_gen_err("Cannot destroy AQP1 QP. ret=%i", ret);
611 return ret;
612 }
613
614 ret = ib_destroy_cq(sport->ibcq_aqp1);
615 if (ret)
616 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%i", ret);
617
618 return ret;
619 }
620
621 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
622 {
623 return snprintf(buf, PAGE_SIZE, "%d\n", ehca_debug_level);
624 }
625
626 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
627 const char *buf, size_t count)
628 {
629 int value = (*buf) - '0';
630 if (value >= 0 && value <= 9)
631 ehca_debug_level = value;
632 return 1;
633 }
634
635 static DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
636 ehca_show_debug_level, ehca_store_debug_level);
637
638 static struct attribute *ehca_drv_attrs[] = {
639 &driver_attr_debug_level.attr,
640 NULL
641 };
642
643 static struct attribute_group ehca_drv_attr_grp = {
644 .attrs = ehca_drv_attrs
645 };
646
647 static const struct attribute_group *ehca_drv_attr_groups[] = {
648 &ehca_drv_attr_grp,
649 NULL,
650 };
651
652 #define EHCA_RESOURCE_ATTR(name) \
653 static ssize_t ehca_show_##name(struct device *dev, \
654 struct device_attribute *attr, \
655 char *buf) \
656 { \
657 struct ehca_shca *shca; \
658 struct hipz_query_hca *rblock; \
659 int data; \
660 \
661 shca = dev_get_drvdata(dev); \
662 \
663 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL); \
664 if (!rblock) { \
665 dev_err(dev, "Can't allocate rblock memory.\n"); \
666 return 0; \
667 } \
668 \
669 if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
670 dev_err(dev, "Can't query device properties\n"); \
671 ehca_free_fw_ctrlblock(rblock); \
672 return 0; \
673 } \
674 \
675 data = rblock->name; \
676 ehca_free_fw_ctrlblock(rblock); \
677 \
678 if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1)) \
679 return snprintf(buf, 256, "1\n"); \
680 else \
681 return snprintf(buf, 256, "%d\n", data); \
682 \
683 } \
684 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
685
686 EHCA_RESOURCE_ATTR(num_ports);
687 EHCA_RESOURCE_ATTR(hw_ver);
688 EHCA_RESOURCE_ATTR(max_eq);
689 EHCA_RESOURCE_ATTR(cur_eq);
690 EHCA_RESOURCE_ATTR(max_cq);
691 EHCA_RESOURCE_ATTR(cur_cq);
692 EHCA_RESOURCE_ATTR(max_qp);
693 EHCA_RESOURCE_ATTR(cur_qp);
694 EHCA_RESOURCE_ATTR(max_mr);
695 EHCA_RESOURCE_ATTR(cur_mr);
696 EHCA_RESOURCE_ATTR(max_mw);
697 EHCA_RESOURCE_ATTR(cur_mw);
698 EHCA_RESOURCE_ATTR(max_pd);
699 EHCA_RESOURCE_ATTR(max_ah);
700
701 static ssize_t ehca_show_adapter_handle(struct device *dev,
702 struct device_attribute *attr,
703 char *buf)
704 {
705 struct ehca_shca *shca = dev_get_drvdata(dev);
706
707 return sprintf(buf, "%llx\n", shca->ipz_hca_handle.handle);
708
709 }
710 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
711
712 static struct attribute *ehca_dev_attrs[] = {
713 &dev_attr_adapter_handle.attr,
714 &dev_attr_num_ports.attr,
715 &dev_attr_hw_ver.attr,
716 &dev_attr_max_eq.attr,
717 &dev_attr_cur_eq.attr,
718 &dev_attr_max_cq.attr,
719 &dev_attr_cur_cq.attr,
720 &dev_attr_max_qp.attr,
721 &dev_attr_cur_qp.attr,
722 &dev_attr_max_mr.attr,
723 &dev_attr_cur_mr.attr,
724 &dev_attr_max_mw.attr,
725 &dev_attr_cur_mw.attr,
726 &dev_attr_max_pd.attr,
727 &dev_attr_max_ah.attr,
728 NULL
729 };
730
731 static struct attribute_group ehca_dev_attr_grp = {
732 .attrs = ehca_dev_attrs
733 };
734
735 static int ehca_probe(struct platform_device *dev)
736 {
737 struct ehca_shca *shca;
738 const u64 *handle;
739 struct ib_pd *ibpd;
740 int ret, i, eq_size;
741 unsigned long flags;
742
743 handle = of_get_property(dev->dev.of_node, "ibm,hca-handle", NULL);
744 if (!handle) {
745 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
746 dev->dev.of_node->full_name);
747 return -ENODEV;
748 }
749
750 if (!(*handle)) {
751 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
752 dev->dev.of_node->full_name);
753 return -ENODEV;
754 }
755
756 shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
757 if (!shca) {
758 ehca_gen_err("Cannot allocate shca memory.");
759 return -ENOMEM;
760 }
761
762 mutex_init(&shca->modify_mutex);
763 atomic_set(&shca->num_cqs, 0);
764 atomic_set(&shca->num_qps, 0);
765 shca->max_num_qps = ehca_max_qp;
766 shca->max_num_cqs = ehca_max_cq;
767
768 for (i = 0; i < ARRAY_SIZE(shca->sport); i++)
769 spin_lock_init(&shca->sport[i].mod_sqp_lock);
770
771 shca->ofdev = dev;
772 shca->ipz_hca_handle.handle = *handle;
773 dev_set_drvdata(&dev->dev, shca);
774
775 ret = ehca_sense_attributes(shca);
776 if (ret < 0) {
777 ehca_gen_err("Cannot sense eHCA attributes.");
778 goto probe1;
779 }
780
781 ret = ehca_init_device(shca);
782 if (ret) {
783 ehca_gen_err("Cannot init ehca device struct");
784 goto probe1;
785 }
786
787 eq_size = 2 * shca->max_num_cqs + 4 * shca->max_num_qps;
788 /* create event queues */
789 ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, eq_size);
790 if (ret) {
791 ehca_err(&shca->ib_device, "Cannot create EQ.");
792 goto probe1;
793 }
794
795 ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
796 if (ret) {
797 ehca_err(&shca->ib_device, "Cannot create NEQ.");
798 goto probe3;
799 }
800
801 /* create internal protection domain */
802 ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL);
803 if (IS_ERR(ibpd)) {
804 ehca_err(&shca->ib_device, "Cannot create internal PD.");
805 ret = PTR_ERR(ibpd);
806 goto probe4;
807 }
808
809 shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
810 shca->pd->ib_pd.device = &shca->ib_device;
811
812 /* create internal max MR */
813 ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
814
815 if (ret) {
816 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%i",
817 ret);
818 goto probe5;
819 }
820
821 ret = ib_register_device(&shca->ib_device, NULL);
822 if (ret) {
823 ehca_err(&shca->ib_device,
824 "ib_register_device() failed ret=%i", ret);
825 goto probe6;
826 }
827
828 /* create AQP1 for port 1 */
829 if (ehca_open_aqp1 == 1) {
830 shca->sport[0].port_state = IB_PORT_DOWN;
831 ret = ehca_create_aqp1(shca, 1);
832 if (ret) {
833 ehca_err(&shca->ib_device,
834 "Cannot create AQP1 for port 1.");
835 goto probe7;
836 }
837 }
838
839 /* create AQP1 for port 2 */
840 if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
841 shca->sport[1].port_state = IB_PORT_DOWN;
842 ret = ehca_create_aqp1(shca, 2);
843 if (ret) {
844 ehca_err(&shca->ib_device,
845 "Cannot create AQP1 for port 2.");
846 goto probe8;
847 }
848 }
849
850 ret = sysfs_create_group(&dev->dev.kobj, &ehca_dev_attr_grp);
851 if (ret) /* only complain; we can live without attributes */
852 ehca_err(&shca->ib_device,
853 "Cannot create device attributes ret=%d", ret);
854
855 spin_lock_irqsave(&shca_list_lock, flags);
856 list_add(&shca->shca_list, &shca_list);
857 spin_unlock_irqrestore(&shca_list_lock, flags);
858
859 return 0;
860
861 probe8:
862 ret = ehca_destroy_aqp1(&shca->sport[0]);
863 if (ret)
864 ehca_err(&shca->ib_device,
865 "Cannot destroy AQP1 for port 1. ret=%i", ret);
866
867 probe7:
868 ib_unregister_device(&shca->ib_device);
869
870 probe6:
871 ret = ehca_dereg_internal_maxmr(shca);
872 if (ret)
873 ehca_err(&shca->ib_device,
874 "Cannot destroy internal MR. ret=%x", ret);
875
876 probe5:
877 ret = ehca_dealloc_pd(&shca->pd->ib_pd);
878 if (ret)
879 ehca_err(&shca->ib_device,
880 "Cannot destroy internal PD. ret=%x", ret);
881
882 probe4:
883 ret = ehca_destroy_eq(shca, &shca->neq);
884 if (ret)
885 ehca_err(&shca->ib_device,
886 "Cannot destroy NEQ. ret=%x", ret);
887
888 probe3:
889 ret = ehca_destroy_eq(shca, &shca->eq);
890 if (ret)
891 ehca_err(&shca->ib_device,
892 "Cannot destroy EQ. ret=%x", ret);
893
894 probe1:
895 ib_dealloc_device(&shca->ib_device);
896
897 return -EINVAL;
898 }
899
900 static int ehca_remove(struct platform_device *dev)
901 {
902 struct ehca_shca *shca = dev_get_drvdata(&dev->dev);
903 unsigned long flags;
904 int ret;
905
906 sysfs_remove_group(&dev->dev.kobj, &ehca_dev_attr_grp);
907
908 if (ehca_open_aqp1 == 1) {
909 int i;
910 for (i = 0; i < shca->num_ports; i++) {
911 ret = ehca_destroy_aqp1(&shca->sport[i]);
912 if (ret)
913 ehca_err(&shca->ib_device,
914 "Cannot destroy AQP1 for port %x "
915 "ret=%i", ret, i);
916 }
917 }
918
919 ib_unregister_device(&shca->ib_device);
920
921 ret = ehca_dereg_internal_maxmr(shca);
922 if (ret)
923 ehca_err(&shca->ib_device,
924 "Cannot destroy internal MR. ret=%i", ret);
925
926 ret = ehca_dealloc_pd(&shca->pd->ib_pd);
927 if (ret)
928 ehca_err(&shca->ib_device,
929 "Cannot destroy internal PD. ret=%i", ret);
930
931 ret = ehca_destroy_eq(shca, &shca->eq);
932 if (ret)
933 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%i", ret);
934
935 ret = ehca_destroy_eq(shca, &shca->neq);
936 if (ret)
937 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%i", ret);
938
939 ib_dealloc_device(&shca->ib_device);
940
941 spin_lock_irqsave(&shca_list_lock, flags);
942 list_del(&shca->shca_list);
943 spin_unlock_irqrestore(&shca_list_lock, flags);
944
945 return ret;
946 }
947
948 static struct of_device_id ehca_device_table[] =
949 {
950 {
951 .name = "lhca",
952 .compatible = "IBM,lhca",
953 },
954 {},
955 };
956 MODULE_DEVICE_TABLE(of, ehca_device_table);
957
958 static struct platform_driver ehca_driver = {
959 .probe = ehca_probe,
960 .remove = ehca_remove,
961 .driver = {
962 .name = "ehca",
963 .owner = THIS_MODULE,
964 .groups = ehca_drv_attr_groups,
965 .of_match_table = ehca_device_table,
966 },
967 };
968
969 void ehca_poll_eqs(unsigned long data)
970 {
971 struct ehca_shca *shca;
972
973 spin_lock(&shca_list_lock);
974 list_for_each_entry(shca, &shca_list, shca_list) {
975 if (shca->eq.is_initialized) {
976 /* call deadman proc only if eq ptr does not change */
977 struct ehca_eq *eq = &shca->eq;
978 int max = 3;
979 volatile u64 q_ofs, q_ofs2;
980 unsigned long flags;
981 spin_lock_irqsave(&eq->spinlock, flags);
982 q_ofs = eq->ipz_queue.current_q_offset;
983 spin_unlock_irqrestore(&eq->spinlock, flags);
984 do {
985 spin_lock_irqsave(&eq->spinlock, flags);
986 q_ofs2 = eq->ipz_queue.current_q_offset;
987 spin_unlock_irqrestore(&eq->spinlock, flags);
988 max--;
989 } while (q_ofs == q_ofs2 && max > 0);
990 if (q_ofs == q_ofs2)
991 ehca_process_eq(shca, 0);
992 }
993 }
994 mod_timer(&poll_eqs_timer, round_jiffies(jiffies + HZ));
995 spin_unlock(&shca_list_lock);
996 }
997
998 static int ehca_mem_notifier(struct notifier_block *nb,
999 unsigned long action, void *data)
1000 {
1001 static unsigned long ehca_dmem_warn_time;
1002 unsigned long flags;
1003
1004 switch (action) {
1005 case MEM_CANCEL_OFFLINE:
1006 case MEM_CANCEL_ONLINE:
1007 case MEM_ONLINE:
1008 case MEM_OFFLINE:
1009 return NOTIFY_OK;
1010 case MEM_GOING_ONLINE:
1011 case MEM_GOING_OFFLINE:
1012 /* only ok if no hca is attached to the lpar */
1013 spin_lock_irqsave(&shca_list_lock, flags);
1014 if (list_empty(&shca_list)) {
1015 spin_unlock_irqrestore(&shca_list_lock, flags);
1016 return NOTIFY_OK;
1017 } else {
1018 spin_unlock_irqrestore(&shca_list_lock, flags);
1019 if (printk_timed_ratelimit(&ehca_dmem_warn_time,
1020 30 * 1000))
1021 ehca_gen_err("DMEM operations are not allowed"
1022 "in conjunction with eHCA");
1023 return NOTIFY_BAD;
1024 }
1025 }
1026 return NOTIFY_OK;
1027 }
1028
1029 static struct notifier_block ehca_mem_nb = {
1030 .notifier_call = ehca_mem_notifier,
1031 };
1032
1033 static int __init ehca_module_init(void)
1034 {
1035 int ret;
1036
1037 printk(KERN_INFO "eHCA Infiniband Device Driver "
1038 "(Version " HCAD_VERSION ")\n");
1039
1040 ret = ehca_create_comp_pool();
1041 if (ret) {
1042 ehca_gen_err("Cannot create comp pool.");
1043 return ret;
1044 }
1045
1046 ret = ehca_create_slab_caches();
1047 if (ret) {
1048 ehca_gen_err("Cannot create SLAB caches");
1049 ret = -ENOMEM;
1050 goto module_init1;
1051 }
1052
1053 ret = ehca_create_busmap();
1054 if (ret) {
1055 ehca_gen_err("Cannot create busmap.");
1056 goto module_init2;
1057 }
1058
1059 ret = ibmebus_register_driver(&ehca_driver);
1060 if (ret) {
1061 ehca_gen_err("Cannot register eHCA device driver");
1062 ret = -EINVAL;
1063 goto module_init3;
1064 }
1065
1066 ret = register_memory_notifier(&ehca_mem_nb);
1067 if (ret) {
1068 ehca_gen_err("Failed registering memory add/remove notifier");
1069 goto module_init4;
1070 }
1071
1072 if (ehca_poll_all_eqs != 1) {
1073 ehca_gen_err("WARNING!!!");
1074 ehca_gen_err("It is possible to lose interrupts.");
1075 } else {
1076 init_timer(&poll_eqs_timer);
1077 poll_eqs_timer.function = ehca_poll_eqs;
1078 poll_eqs_timer.expires = jiffies + HZ;
1079 add_timer(&poll_eqs_timer);
1080 }
1081
1082 return 0;
1083
1084 module_init4:
1085 ibmebus_unregister_driver(&ehca_driver);
1086
1087 module_init3:
1088 ehca_destroy_busmap();
1089
1090 module_init2:
1091 ehca_destroy_slab_caches();
1092
1093 module_init1:
1094 ehca_destroy_comp_pool();
1095 return ret;
1096 };
1097
1098 static void __exit ehca_module_exit(void)
1099 {
1100 if (ehca_poll_all_eqs == 1)
1101 del_timer_sync(&poll_eqs_timer);
1102
1103 ibmebus_unregister_driver(&ehca_driver);
1104
1105 unregister_memory_notifier(&ehca_mem_nb);
1106
1107 ehca_destroy_busmap();
1108
1109 ehca_destroy_slab_caches();
1110
1111 ehca_destroy_comp_pool();
1112
1113 idr_destroy(&ehca_cq_idr);
1114 idr_destroy(&ehca_qp_idr);
1115 };
1116
1117 module_init(ehca_module_init);
1118 module_exit(ehca_module_exit);
Linux kernel - Deliverables
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