Loading...
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
57MODULE_LICENSE("Dual BSD/GPL");
58MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
59MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver");
60MODULE_VERSION(HCAD_VERSION);
61
62static bool ehca_open_aqp1 = 0;
63static int ehca_hw_level = 0;
64static bool ehca_poll_all_eqs = 1;
65
66int ehca_debug_level = 0;
67int ehca_nr_ports = -1;
68bool ehca_use_hp_mr = 0;
69int ehca_port_act_time = 30;
70int ehca_static_rate = -1;
71bool ehca_scaling_code = 0;
72int ehca_lock_hcalls = -1;
73int ehca_max_cq = -1;
74int ehca_max_qp = -1;
75
76module_param_named(open_aqp1, ehca_open_aqp1, bool, S_IRUGO);
77module_param_named(debug_level, ehca_debug_level, int, S_IRUGO);
78module_param_named(hw_level, ehca_hw_level, int, S_IRUGO);
79module_param_named(nr_ports, ehca_nr_ports, int, S_IRUGO);
80module_param_named(use_hp_mr, ehca_use_hp_mr, bool, S_IRUGO);
81module_param_named(port_act_time, ehca_port_act_time, int, S_IRUGO);
82module_param_named(poll_all_eqs, ehca_poll_all_eqs, bool, S_IRUGO);
83module_param_named(static_rate, ehca_static_rate, int, S_IRUGO);
84module_param_named(scaling_code, ehca_scaling_code, bool, S_IRUGO);
85module_param_named(lock_hcalls, ehca_lock_hcalls, bint, S_IRUGO);
86module_param_named(number_of_cqs, ehca_max_cq, int, S_IRUGO);
87module_param_named(number_of_qps, ehca_max_qp, int, S_IRUGO);
88
89MODULE_PARM_DESC(open_aqp1,
90 "Open AQP1 on startup (default: no)");
91MODULE_PARM_DESC(debug_level,
92 "Amount of debug output (0: none (default), 1: traces, "
93 "2: some dumps, 3: lots)");
94MODULE_PARM_DESC(hw_level,
95 "Hardware level (0: autosensing (default), "
96 "0x10..0x14: eHCA, 0x20..0x23: eHCA2)");
97MODULE_PARM_DESC(nr_ports,
98 "number of connected ports (-1: autodetect (default), "
99 "1: port one only, 2: two ports)");
100MODULE_PARM_DESC(use_hp_mr,
101 "Use high performance MRs (default: no)");
102MODULE_PARM_DESC(port_act_time,
103 "Time to wait for port activation (default: 30 sec)");
104MODULE_PARM_DESC(poll_all_eqs,
105 "Poll all event queues periodically (default: yes)");
106MODULE_PARM_DESC(static_rate,
107 "Set permanent static rate (default: no static rate)");
108MODULE_PARM_DESC(scaling_code,
109 "Enable scaling code (default: no)");
110MODULE_PARM_DESC(lock_hcalls,
111 "Serialize all hCalls made by the driver "
112 "(default: autodetect)");
113MODULE_PARM_DESC(number_of_cqs,
114 "Max number of CQs which can be allocated "
115 "(default: autodetect)");
116MODULE_PARM_DESC(number_of_qps,
117 "Max number of QPs which can be allocated "
118 "(default: autodetect)");
119
120DEFINE_RWLOCK(ehca_qp_idr_lock);
121DEFINE_RWLOCK(ehca_cq_idr_lock);
122DEFINE_IDR(ehca_qp_idr);
123DEFINE_IDR(ehca_cq_idr);
124
125static LIST_HEAD(shca_list); /* list of all registered ehcas */
126DEFINE_SPINLOCK(shca_list_lock);
127
128static struct timer_list poll_eqs_timer;
129
130#ifdef CONFIG_PPC_64K_PAGES
131static struct kmem_cache *ctblk_cache;
132
133void *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
141void ehca_free_fw_ctrlblock(void *ptr)
142{
143 if (ptr)
144 kmem_cache_free(ctblk_cache, ptr);
145
146}
147#endif
148
149int 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
166static int ehca_create_slab_caches(void)
167{
168 int ret;
169
170 ret = ehca_init_pd_cache();
171 if (ret) {
172 ehca_gen_err("Cannot create PD SLAB cache.");
173 return ret;
174 }
175
176 ret = ehca_init_cq_cache();
177 if (ret) {
178 ehca_gen_err("Cannot create CQ SLAB cache.");
179 goto create_slab_caches2;
180 }
181
182 ret = ehca_init_qp_cache();
183 if (ret) {
184 ehca_gen_err("Cannot create QP SLAB cache.");
185 goto create_slab_caches3;
186 }
187
188 ret = ehca_init_av_cache();
189 if (ret) {
190 ehca_gen_err("Cannot create AV SLAB cache.");
191 goto create_slab_caches4;
192 }
193
194 ret = ehca_init_mrmw_cache();
195 if (ret) {
196 ehca_gen_err("Cannot create MR&MW SLAB cache.");
197 goto create_slab_caches5;
198 }
199
200 ret = ehca_init_small_qp_cache();
201 if (ret) {
202 ehca_gen_err("Cannot create small queue SLAB cache.");
203 goto create_slab_caches6;
204 }
205
206#ifdef CONFIG_PPC_64K_PAGES
207 ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
208 EHCA_PAGESIZE, H_CB_ALIGNMENT,
209 SLAB_HWCACHE_ALIGN,
210 NULL);
211 if (!ctblk_cache) {
212 ehca_gen_err("Cannot create ctblk SLAB cache.");
213 ehca_cleanup_small_qp_cache();
214 goto create_slab_caches6;
215 }
216#endif
217 return 0;
218
219create_slab_caches6:
220 ehca_cleanup_mrmw_cache();
221
222create_slab_caches5:
223 ehca_cleanup_av_cache();
224
225create_slab_caches4:
226 ehca_cleanup_qp_cache();
227
228create_slab_caches3:
229 ehca_cleanup_cq_cache();
230
231create_slab_caches2:
232 ehca_cleanup_pd_cache();
233
234 return ret;
235}
236
237static void ehca_destroy_slab_caches(void)
238{
239 ehca_cleanup_small_qp_cache();
240 ehca_cleanup_mrmw_cache();
241 ehca_cleanup_av_cache();
242 ehca_cleanup_qp_cache();
243 ehca_cleanup_cq_cache();
244 ehca_cleanup_pd_cache();
245#ifdef CONFIG_PPC_64K_PAGES
246 if (ctblk_cache)
247 kmem_cache_destroy(ctblk_cache);
248#endif
249}
250
251#define EHCA_HCAAVER EHCA_BMASK_IBM(32, 39)
252#define EHCA_REVID EHCA_BMASK_IBM(40, 63)
253
254static struct cap_descr {
255 u64 mask;
256 char *descr;
257} hca_cap_descr[] = {
258 { HCA_CAP_AH_PORT_NR_CHECK, "HCA_CAP_AH_PORT_NR_CHECK" },
259 { HCA_CAP_ATOMIC, "HCA_CAP_ATOMIC" },
260 { HCA_CAP_AUTO_PATH_MIG, "HCA_CAP_AUTO_PATH_MIG" },
261 { HCA_CAP_BAD_P_KEY_CTR, "HCA_CAP_BAD_P_KEY_CTR" },
262 { HCA_CAP_SQD_RTS_PORT_CHANGE, "HCA_CAP_SQD_RTS_PORT_CHANGE" },
263 { HCA_CAP_CUR_QP_STATE_MOD, "HCA_CAP_CUR_QP_STATE_MOD" },
264 { HCA_CAP_INIT_TYPE, "HCA_CAP_INIT_TYPE" },
265 { HCA_CAP_PORT_ACTIVE_EVENT, "HCA_CAP_PORT_ACTIVE_EVENT" },
266 { HCA_CAP_Q_KEY_VIOL_CTR, "HCA_CAP_Q_KEY_VIOL_CTR" },
267 { HCA_CAP_WQE_RESIZE, "HCA_CAP_WQE_RESIZE" },
268 { HCA_CAP_RAW_PACKET_MCAST, "HCA_CAP_RAW_PACKET_MCAST" },
269 { HCA_CAP_SHUTDOWN_PORT, "HCA_CAP_SHUTDOWN_PORT" },
270 { HCA_CAP_RC_LL_QP, "HCA_CAP_RC_LL_QP" },
271 { HCA_CAP_SRQ, "HCA_CAP_SRQ" },
272 { HCA_CAP_UD_LL_QP, "HCA_CAP_UD_LL_QP" },
273 { HCA_CAP_RESIZE_MR, "HCA_CAP_RESIZE_MR" },
274 { HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" },
275 { HCA_CAP_H_ALLOC_RES_SYNC, "HCA_CAP_H_ALLOC_RES_SYNC" },
276};
277
278static int ehca_sense_attributes(struct ehca_shca *shca)
279{
280 int i, ret = 0;
281 u64 h_ret;
282 struct hipz_query_hca *rblock;
283 struct hipz_query_port *port;
284 const char *loc_code;
285
286 static const u32 pgsize_map[] = {
287 HCA_CAP_MR_PGSIZE_4K, 0x1000,
288 HCA_CAP_MR_PGSIZE_64K, 0x10000,
289 HCA_CAP_MR_PGSIZE_1M, 0x100000,
290 HCA_CAP_MR_PGSIZE_16M, 0x1000000,
291 };
292
293 ehca_gen_dbg("Probing adapter %s...",
294 shca->ofdev->dev.of_node->full_name);
295 loc_code = of_get_property(shca->ofdev->dev.of_node, "ibm,loc-code",
296 NULL);
297 if (loc_code)
298 ehca_gen_dbg(" ... location lode=%s", loc_code);
299
300 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
301 if (!rblock) {
302 ehca_gen_err("Cannot allocate rblock memory.");
303 return -ENOMEM;
304 }
305
306 h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
307 if (h_ret != H_SUCCESS) {
308 ehca_gen_err("Cannot query device properties. h_ret=%lli",
309 h_ret);
310 ret = -EPERM;
311 goto sense_attributes1;
312 }
313
314 if (ehca_nr_ports == 1)
315 shca->num_ports = 1;
316 else
317 shca->num_ports = (u8)rblock->num_ports;
318
319 ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
320
321 if (ehca_hw_level == 0) {
322 u32 hcaaver;
323 u32 revid;
324
325 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
326 revid = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
327
328 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
329
330 if (hcaaver == 1) {
331 if (revid <= 3)
332 shca->hw_level = 0x10 | (revid + 1);
333 else
334 shca->hw_level = 0x14;
335 } else if (hcaaver == 2) {
336 if (revid == 0)
337 shca->hw_level = 0x21;
338 else if (revid == 0x10)
339 shca->hw_level = 0x22;
340 else if (revid == 0x20 || revid == 0x21)
341 shca->hw_level = 0x23;
342 }
343
344 if (!shca->hw_level) {
345 ehca_gen_warn("unknown hardware version"
346 " - assuming default level");
347 shca->hw_level = 0x22;
348 }
349 } else
350 shca->hw_level = ehca_hw_level;
351 ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
352
353 shca->hca_cap = rblock->hca_cap_indicators;
354 ehca_gen_dbg(" ... HCA capabilities:");
355 for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
356 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
357 ehca_gen_dbg(" %s", hca_cap_descr[i].descr);
358
359 /* Autodetect hCall locking -- the "H_ALLOC_RESOURCE synced" flag is
360 * a firmware property, so it's valid across all adapters
361 */
362 if (ehca_lock_hcalls == -1)
363 ehca_lock_hcalls = !EHCA_BMASK_GET(HCA_CAP_H_ALLOC_RES_SYNC,
364 shca->hca_cap);
365
366 /* translate supported MR page sizes; always support 4K */
367 shca->hca_cap_mr_pgsize = EHCA_PAGESIZE;
368 for (i = 0; i < ARRAY_SIZE(pgsize_map); i += 2)
369 if (rblock->memory_page_size_supported & pgsize_map[i])
370 shca->hca_cap_mr_pgsize |= pgsize_map[i + 1];
371
372 /* Set maximum number of CQs and QPs to calculate EQ size */
373 if (shca->max_num_qps == -1)
374 shca->max_num_qps = min_t(int, rblock->max_qp,
375 EHCA_MAX_NUM_QUEUES);
376 else if (shca->max_num_qps < 1 || shca->max_num_qps > rblock->max_qp) {
377 ehca_gen_warn("The requested number of QPs is out of range "
378 "(1 - %i) specified by HW. Value is set to %i",
379 rblock->max_qp, rblock->max_qp);
380 shca->max_num_qps = rblock->max_qp;
381 }
382
383 if (shca->max_num_cqs == -1)
384 shca->max_num_cqs = min_t(int, rblock->max_cq,
385 EHCA_MAX_NUM_QUEUES);
386 else if (shca->max_num_cqs < 1 || shca->max_num_cqs > rblock->max_cq) {
387 ehca_gen_warn("The requested number of CQs is out of range "
388 "(1 - %i) specified by HW. Value is set to %i",
389 rblock->max_cq, rblock->max_cq);
390 }
391
392 /* query max MTU from first port -- it's the same for all ports */
393 port = (struct hipz_query_port *)rblock;
394 h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
395 if (h_ret != H_SUCCESS) {
396 ehca_gen_err("Cannot query port properties. h_ret=%lli",
397 h_ret);
398 ret = -EPERM;
399 goto sense_attributes1;
400 }
401
402 shca->max_mtu = port->max_mtu;
403
404sense_attributes1:
405 ehca_free_fw_ctrlblock(rblock);
406 return ret;
407}
408
409static int init_node_guid(struct ehca_shca *shca)
410{
411 int ret = 0;
412 struct hipz_query_hca *rblock;
413
414 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
415 if (!rblock) {
416 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
417 return -ENOMEM;
418 }
419
420 if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
421 ehca_err(&shca->ib_device, "Can't query device properties");
422 ret = -EINVAL;
423 goto init_node_guid1;
424 }
425
426 memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
427
428init_node_guid1:
429 ehca_free_fw_ctrlblock(rblock);
430 return ret;
431}
432
433static int ehca_init_device(struct ehca_shca *shca)
434{
435 int ret;
436
437 ret = init_node_guid(shca);
438 if (ret)
439 return ret;
440
441 strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
442 shca->ib_device.owner = THIS_MODULE;
443
444 shca->ib_device.uverbs_abi_ver = 8;
445 shca->ib_device.uverbs_cmd_mask =
446 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
447 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
448 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
449 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
450 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
451 (1ull << IB_USER_VERBS_CMD_REG_MR) |
452 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
453 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
454 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
455 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
456 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
457 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
458 (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
459 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
460 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) |
461 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
462
463 shca->ib_device.node_type = RDMA_NODE_IB_CA;
464 shca->ib_device.phys_port_cnt = shca->num_ports;
465 shca->ib_device.num_comp_vectors = 1;
466 shca->ib_device.dma_device = &shca->ofdev->dev;
467 shca->ib_device.query_device = ehca_query_device;
468 shca->ib_device.query_port = ehca_query_port;
469 shca->ib_device.query_gid = ehca_query_gid;
470 shca->ib_device.query_pkey = ehca_query_pkey;
471 /* shca->in_device.modify_device = ehca_modify_device */
472 shca->ib_device.modify_port = ehca_modify_port;
473 shca->ib_device.alloc_ucontext = ehca_alloc_ucontext;
474 shca->ib_device.dealloc_ucontext = ehca_dealloc_ucontext;
475 shca->ib_device.alloc_pd = ehca_alloc_pd;
476 shca->ib_device.dealloc_pd = ehca_dealloc_pd;
477 shca->ib_device.create_ah = ehca_create_ah;
478 /* shca->ib_device.modify_ah = ehca_modify_ah; */
479 shca->ib_device.query_ah = ehca_query_ah;
480 shca->ib_device.destroy_ah = ehca_destroy_ah;
481 shca->ib_device.create_qp = ehca_create_qp;
482 shca->ib_device.modify_qp = ehca_modify_qp;
483 shca->ib_device.query_qp = ehca_query_qp;
484 shca->ib_device.destroy_qp = ehca_destroy_qp;
485 shca->ib_device.post_send = ehca_post_send;
486 shca->ib_device.post_recv = ehca_post_recv;
487 shca->ib_device.create_cq = ehca_create_cq;
488 shca->ib_device.destroy_cq = ehca_destroy_cq;
489 shca->ib_device.resize_cq = ehca_resize_cq;
490 shca->ib_device.poll_cq = ehca_poll_cq;
491 /* shca->ib_device.peek_cq = ehca_peek_cq; */
492 shca->ib_device.req_notify_cq = ehca_req_notify_cq;
493 /* shca->ib_device.req_ncomp_notif = ehca_req_ncomp_notif; */
494 shca->ib_device.get_dma_mr = ehca_get_dma_mr;
495 shca->ib_device.reg_phys_mr = ehca_reg_phys_mr;
496 shca->ib_device.reg_user_mr = ehca_reg_user_mr;
497 shca->ib_device.query_mr = ehca_query_mr;
498 shca->ib_device.dereg_mr = ehca_dereg_mr;
499 shca->ib_device.rereg_phys_mr = ehca_rereg_phys_mr;
500 shca->ib_device.alloc_mw = ehca_alloc_mw;
501 shca->ib_device.bind_mw = ehca_bind_mw;
502 shca->ib_device.dealloc_mw = ehca_dealloc_mw;
503 shca->ib_device.alloc_fmr = ehca_alloc_fmr;
504 shca->ib_device.map_phys_fmr = ehca_map_phys_fmr;
505 shca->ib_device.unmap_fmr = ehca_unmap_fmr;
506 shca->ib_device.dealloc_fmr = ehca_dealloc_fmr;
507 shca->ib_device.attach_mcast = ehca_attach_mcast;
508 shca->ib_device.detach_mcast = ehca_detach_mcast;
509 shca->ib_device.process_mad = ehca_process_mad;
510 shca->ib_device.mmap = ehca_mmap;
511 shca->ib_device.dma_ops = &ehca_dma_mapping_ops;
512
513 if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
514 shca->ib_device.uverbs_cmd_mask |=
515 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
516 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
517 (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
518 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
519
520 shca->ib_device.create_srq = ehca_create_srq;
521 shca->ib_device.modify_srq = ehca_modify_srq;
522 shca->ib_device.query_srq = ehca_query_srq;
523 shca->ib_device.destroy_srq = ehca_destroy_srq;
524 shca->ib_device.post_srq_recv = ehca_post_srq_recv;
525 }
526
527 return ret;
528}
529
530static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
531{
532 struct ehca_sport *sport = &shca->sport[port - 1];
533 struct ib_cq *ibcq;
534 struct ib_qp *ibqp;
535 struct ib_qp_init_attr qp_init_attr;
536 int ret;
537
538 if (sport->ibcq_aqp1) {
539 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
540 return -EPERM;
541 }
542
543 ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void *)(-1), 10, 0);
544 if (IS_ERR(ibcq)) {
545 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
546 return PTR_ERR(ibcq);
547 }
548 sport->ibcq_aqp1 = ibcq;
549
550 if (sport->ibqp_sqp[IB_QPT_GSI]) {
551 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
552 ret = -EPERM;
553 goto create_aqp1;
554 }
555
556 memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
557 qp_init_attr.send_cq = ibcq;
558 qp_init_attr.recv_cq = ibcq;
559 qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
560 qp_init_attr.cap.max_send_wr = 100;
561 qp_init_attr.cap.max_recv_wr = 100;
562 qp_init_attr.cap.max_send_sge = 2;
563 qp_init_attr.cap.max_recv_sge = 1;
564 qp_init_attr.qp_type = IB_QPT_GSI;
565 qp_init_attr.port_num = port;
566 qp_init_attr.qp_context = NULL;
567 qp_init_attr.event_handler = NULL;
568 qp_init_attr.srq = NULL;
569
570 ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
571 if (IS_ERR(ibqp)) {
572 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
573 ret = PTR_ERR(ibqp);
574 goto create_aqp1;
575 }
576 sport->ibqp_sqp[IB_QPT_GSI] = ibqp;
577
578 return 0;
579
580create_aqp1:
581 ib_destroy_cq(sport->ibcq_aqp1);
582 return ret;
583}
584
585static int ehca_destroy_aqp1(struct ehca_sport *sport)
586{
587 int ret;
588
589 ret = ib_destroy_qp(sport->ibqp_sqp[IB_QPT_GSI]);
590 if (ret) {
591 ehca_gen_err("Cannot destroy AQP1 QP. ret=%i", ret);
592 return ret;
593 }
594
595 ret = ib_destroy_cq(sport->ibcq_aqp1);
596 if (ret)
597 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%i", ret);
598
599 return ret;
600}
601
602static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
603{
604 return snprintf(buf, PAGE_SIZE, "%d\n", ehca_debug_level);
605}
606
607static ssize_t ehca_store_debug_level(struct device_driver *ddp,
608 const char *buf, size_t count)
609{
610 int value = (*buf) - '0';
611 if (value >= 0 && value <= 9)
612 ehca_debug_level = value;
613 return 1;
614}
615
616static DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
617 ehca_show_debug_level, ehca_store_debug_level);
618
619static struct attribute *ehca_drv_attrs[] = {
620 &driver_attr_debug_level.attr,
621 NULL
622};
623
624static struct attribute_group ehca_drv_attr_grp = {
625 .attrs = ehca_drv_attrs
626};
627
628static const struct attribute_group *ehca_drv_attr_groups[] = {
629 &ehca_drv_attr_grp,
630 NULL,
631};
632
633#define EHCA_RESOURCE_ATTR(name) \
634static ssize_t ehca_show_##name(struct device *dev, \
635 struct device_attribute *attr, \
636 char *buf) \
637{ \
638 struct ehca_shca *shca; \
639 struct hipz_query_hca *rblock; \
640 int data; \
641 \
642 shca = dev_get_drvdata(dev); \
643 \
644 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL); \
645 if (!rblock) { \
646 dev_err(dev, "Can't allocate rblock memory.\n"); \
647 return 0; \
648 } \
649 \
650 if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
651 dev_err(dev, "Can't query device properties\n"); \
652 ehca_free_fw_ctrlblock(rblock); \
653 return 0; \
654 } \
655 \
656 data = rblock->name; \
657 ehca_free_fw_ctrlblock(rblock); \
658 \
659 if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1)) \
660 return snprintf(buf, 256, "1\n"); \
661 else \
662 return snprintf(buf, 256, "%d\n", data); \
663 \
664} \
665static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
666
667EHCA_RESOURCE_ATTR(num_ports);
668EHCA_RESOURCE_ATTR(hw_ver);
669EHCA_RESOURCE_ATTR(max_eq);
670EHCA_RESOURCE_ATTR(cur_eq);
671EHCA_RESOURCE_ATTR(max_cq);
672EHCA_RESOURCE_ATTR(cur_cq);
673EHCA_RESOURCE_ATTR(max_qp);
674EHCA_RESOURCE_ATTR(cur_qp);
675EHCA_RESOURCE_ATTR(max_mr);
676EHCA_RESOURCE_ATTR(cur_mr);
677EHCA_RESOURCE_ATTR(max_mw);
678EHCA_RESOURCE_ATTR(cur_mw);
679EHCA_RESOURCE_ATTR(max_pd);
680EHCA_RESOURCE_ATTR(max_ah);
681
682static ssize_t ehca_show_adapter_handle(struct device *dev,
683 struct device_attribute *attr,
684 char *buf)
685{
686 struct ehca_shca *shca = dev_get_drvdata(dev);
687
688 return sprintf(buf, "%llx\n", shca->ipz_hca_handle.handle);
689
690}
691static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
692
693static struct attribute *ehca_dev_attrs[] = {
694 &dev_attr_adapter_handle.attr,
695 &dev_attr_num_ports.attr,
696 &dev_attr_hw_ver.attr,
697 &dev_attr_max_eq.attr,
698 &dev_attr_cur_eq.attr,
699 &dev_attr_max_cq.attr,
700 &dev_attr_cur_cq.attr,
701 &dev_attr_max_qp.attr,
702 &dev_attr_cur_qp.attr,
703 &dev_attr_max_mr.attr,
704 &dev_attr_cur_mr.attr,
705 &dev_attr_max_mw.attr,
706 &dev_attr_cur_mw.attr,
707 &dev_attr_max_pd.attr,
708 &dev_attr_max_ah.attr,
709 NULL
710};
711
712static struct attribute_group ehca_dev_attr_grp = {
713 .attrs = ehca_dev_attrs
714};
715
716static int __devinit ehca_probe(struct platform_device *dev,
717 const struct of_device_id *id)
718{
719 struct ehca_shca *shca;
720 const u64 *handle;
721 struct ib_pd *ibpd;
722 int ret, i, eq_size;
723 unsigned long flags;
724
725 handle = of_get_property(dev->dev.of_node, "ibm,hca-handle", NULL);
726 if (!handle) {
727 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
728 dev->dev.of_node->full_name);
729 return -ENODEV;
730 }
731
732 if (!(*handle)) {
733 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
734 dev->dev.of_node->full_name);
735 return -ENODEV;
736 }
737
738 shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
739 if (!shca) {
740 ehca_gen_err("Cannot allocate shca memory.");
741 return -ENOMEM;
742 }
743
744 mutex_init(&shca->modify_mutex);
745 atomic_set(&shca->num_cqs, 0);
746 atomic_set(&shca->num_qps, 0);
747 shca->max_num_qps = ehca_max_qp;
748 shca->max_num_cqs = ehca_max_cq;
749
750 for (i = 0; i < ARRAY_SIZE(shca->sport); i++)
751 spin_lock_init(&shca->sport[i].mod_sqp_lock);
752
753 shca->ofdev = dev;
754 shca->ipz_hca_handle.handle = *handle;
755 dev_set_drvdata(&dev->dev, shca);
756
757 ret = ehca_sense_attributes(shca);
758 if (ret < 0) {
759 ehca_gen_err("Cannot sense eHCA attributes.");
760 goto probe1;
761 }
762
763 ret = ehca_init_device(shca);
764 if (ret) {
765 ehca_gen_err("Cannot init ehca device struct");
766 goto probe1;
767 }
768
769 eq_size = 2 * shca->max_num_cqs + 4 * shca->max_num_qps;
770 /* create event queues */
771 ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, eq_size);
772 if (ret) {
773 ehca_err(&shca->ib_device, "Cannot create EQ.");
774 goto probe1;
775 }
776
777 ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
778 if (ret) {
779 ehca_err(&shca->ib_device, "Cannot create NEQ.");
780 goto probe3;
781 }
782
783 /* create internal protection domain */
784 ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL);
785 if (IS_ERR(ibpd)) {
786 ehca_err(&shca->ib_device, "Cannot create internal PD.");
787 ret = PTR_ERR(ibpd);
788 goto probe4;
789 }
790
791 shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
792 shca->pd->ib_pd.device = &shca->ib_device;
793
794 /* create internal max MR */
795 ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
796
797 if (ret) {
798 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%i",
799 ret);
800 goto probe5;
801 }
802
803 ret = ib_register_device(&shca->ib_device, NULL);
804 if (ret) {
805 ehca_err(&shca->ib_device,
806 "ib_register_device() failed ret=%i", ret);
807 goto probe6;
808 }
809
810 /* create AQP1 for port 1 */
811 if (ehca_open_aqp1 == 1) {
812 shca->sport[0].port_state = IB_PORT_DOWN;
813 ret = ehca_create_aqp1(shca, 1);
814 if (ret) {
815 ehca_err(&shca->ib_device,
816 "Cannot create AQP1 for port 1.");
817 goto probe7;
818 }
819 }
820
821 /* create AQP1 for port 2 */
822 if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
823 shca->sport[1].port_state = IB_PORT_DOWN;
824 ret = ehca_create_aqp1(shca, 2);
825 if (ret) {
826 ehca_err(&shca->ib_device,
827 "Cannot create AQP1 for port 2.");
828 goto probe8;
829 }
830 }
831
832 ret = sysfs_create_group(&dev->dev.kobj, &ehca_dev_attr_grp);
833 if (ret) /* only complain; we can live without attributes */
834 ehca_err(&shca->ib_device,
835 "Cannot create device attributes ret=%d", ret);
836
837 spin_lock_irqsave(&shca_list_lock, flags);
838 list_add(&shca->shca_list, &shca_list);
839 spin_unlock_irqrestore(&shca_list_lock, flags);
840
841 return 0;
842
843probe8:
844 ret = ehca_destroy_aqp1(&shca->sport[0]);
845 if (ret)
846 ehca_err(&shca->ib_device,
847 "Cannot destroy AQP1 for port 1. ret=%i", ret);
848
849probe7:
850 ib_unregister_device(&shca->ib_device);
851
852probe6:
853 ret = ehca_dereg_internal_maxmr(shca);
854 if (ret)
855 ehca_err(&shca->ib_device,
856 "Cannot destroy internal MR. ret=%x", ret);
857
858probe5:
859 ret = ehca_dealloc_pd(&shca->pd->ib_pd);
860 if (ret)
861 ehca_err(&shca->ib_device,
862 "Cannot destroy internal PD. ret=%x", ret);
863
864probe4:
865 ret = ehca_destroy_eq(shca, &shca->neq);
866 if (ret)
867 ehca_err(&shca->ib_device,
868 "Cannot destroy NEQ. ret=%x", ret);
869
870probe3:
871 ret = ehca_destroy_eq(shca, &shca->eq);
872 if (ret)
873 ehca_err(&shca->ib_device,
874 "Cannot destroy EQ. ret=%x", ret);
875
876probe1:
877 ib_dealloc_device(&shca->ib_device);
878
879 return -EINVAL;
880}
881
882static int __devexit ehca_remove(struct platform_device *dev)
883{
884 struct ehca_shca *shca = dev_get_drvdata(&dev->dev);
885 unsigned long flags;
886 int ret;
887
888 sysfs_remove_group(&dev->dev.kobj, &ehca_dev_attr_grp);
889
890 if (ehca_open_aqp1 == 1) {
891 int i;
892 for (i = 0; i < shca->num_ports; i++) {
893 ret = ehca_destroy_aqp1(&shca->sport[i]);
894 if (ret)
895 ehca_err(&shca->ib_device,
896 "Cannot destroy AQP1 for port %x "
897 "ret=%i", ret, i);
898 }
899 }
900
901 ib_unregister_device(&shca->ib_device);
902
903 ret = ehca_dereg_internal_maxmr(shca);
904 if (ret)
905 ehca_err(&shca->ib_device,
906 "Cannot destroy internal MR. ret=%i", ret);
907
908 ret = ehca_dealloc_pd(&shca->pd->ib_pd);
909 if (ret)
910 ehca_err(&shca->ib_device,
911 "Cannot destroy internal PD. ret=%i", ret);
912
913 ret = ehca_destroy_eq(shca, &shca->eq);
914 if (ret)
915 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%i", ret);
916
917 ret = ehca_destroy_eq(shca, &shca->neq);
918 if (ret)
919 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%i", ret);
920
921 ib_dealloc_device(&shca->ib_device);
922
923 spin_lock_irqsave(&shca_list_lock, flags);
924 list_del(&shca->shca_list);
925 spin_unlock_irqrestore(&shca_list_lock, flags);
926
927 return ret;
928}
929
930static struct of_device_id ehca_device_table[] =
931{
932 {
933 .name = "lhca",
934 .compatible = "IBM,lhca",
935 },
936 {},
937};
938MODULE_DEVICE_TABLE(of, ehca_device_table);
939
940static struct of_platform_driver ehca_driver = {
941 .probe = ehca_probe,
942 .remove = ehca_remove,
943 .driver = {
944 .name = "ehca",
945 .owner = THIS_MODULE,
946 .groups = ehca_drv_attr_groups,
947 .of_match_table = ehca_device_table,
948 },
949};
950
951void ehca_poll_eqs(unsigned long data)
952{
953 struct ehca_shca *shca;
954
955 spin_lock(&shca_list_lock);
956 list_for_each_entry(shca, &shca_list, shca_list) {
957 if (shca->eq.is_initialized) {
958 /* call deadman proc only if eq ptr does not change */
959 struct ehca_eq *eq = &shca->eq;
960 int max = 3;
961 volatile u64 q_ofs, q_ofs2;
962 unsigned long flags;
963 spin_lock_irqsave(&eq->spinlock, flags);
964 q_ofs = eq->ipz_queue.current_q_offset;
965 spin_unlock_irqrestore(&eq->spinlock, flags);
966 do {
967 spin_lock_irqsave(&eq->spinlock, flags);
968 q_ofs2 = eq->ipz_queue.current_q_offset;
969 spin_unlock_irqrestore(&eq->spinlock, flags);
970 max--;
971 } while (q_ofs == q_ofs2 && max > 0);
972 if (q_ofs == q_ofs2)
973 ehca_process_eq(shca, 0);
974 }
975 }
976 mod_timer(&poll_eqs_timer, round_jiffies(jiffies + HZ));
977 spin_unlock(&shca_list_lock);
978}
979
980static int ehca_mem_notifier(struct notifier_block *nb,
981 unsigned long action, void *data)
982{
983 static unsigned long ehca_dmem_warn_time;
984 unsigned long flags;
985
986 switch (action) {
987 case MEM_CANCEL_OFFLINE:
988 case MEM_CANCEL_ONLINE:
989 case MEM_ONLINE:
990 case MEM_OFFLINE:
991 return NOTIFY_OK;
992 case MEM_GOING_ONLINE:
993 case MEM_GOING_OFFLINE:
994 /* only ok if no hca is attached to the lpar */
995 spin_lock_irqsave(&shca_list_lock, flags);
996 if (list_empty(&shca_list)) {
997 spin_unlock_irqrestore(&shca_list_lock, flags);
998 return NOTIFY_OK;
999 } else {
1000 spin_unlock_irqrestore(&shca_list_lock, flags);
1001 if (printk_timed_ratelimit(&ehca_dmem_warn_time,
1002 30 * 1000))
1003 ehca_gen_err("DMEM operations are not allowed"
1004 "in conjunction with eHCA");
1005 return NOTIFY_BAD;
1006 }
1007 }
1008 return NOTIFY_OK;
1009}
1010
1011static struct notifier_block ehca_mem_nb = {
1012 .notifier_call = ehca_mem_notifier,
1013};
1014
1015static int __init ehca_module_init(void)
1016{
1017 int ret;
1018
1019 printk(KERN_INFO "eHCA Infiniband Device Driver "
1020 "(Version " HCAD_VERSION ")\n");
1021
1022 ret = ehca_create_comp_pool();
1023 if (ret) {
1024 ehca_gen_err("Cannot create comp pool.");
1025 return ret;
1026 }
1027
1028 ret = ehca_create_slab_caches();
1029 if (ret) {
1030 ehca_gen_err("Cannot create SLAB caches");
1031 ret = -ENOMEM;
1032 goto module_init1;
1033 }
1034
1035 ret = ehca_create_busmap();
1036 if (ret) {
1037 ehca_gen_err("Cannot create busmap.");
1038 goto module_init2;
1039 }
1040
1041 ret = ibmebus_register_driver(&ehca_driver);
1042 if (ret) {
1043 ehca_gen_err("Cannot register eHCA device driver");
1044 ret = -EINVAL;
1045 goto module_init3;
1046 }
1047
1048 ret = register_memory_notifier(&ehca_mem_nb);
1049 if (ret) {
1050 ehca_gen_err("Failed registering memory add/remove notifier");
1051 goto module_init4;
1052 }
1053
1054 if (ehca_poll_all_eqs != 1) {
1055 ehca_gen_err("WARNING!!!");
1056 ehca_gen_err("It is possible to lose interrupts.");
1057 } else {
1058 init_timer(&poll_eqs_timer);
1059 poll_eqs_timer.function = ehca_poll_eqs;
1060 poll_eqs_timer.expires = jiffies + HZ;
1061 add_timer(&poll_eqs_timer);
1062 }
1063
1064 return 0;
1065
1066module_init4:
1067 ibmebus_unregister_driver(&ehca_driver);
1068
1069module_init3:
1070 ehca_destroy_busmap();
1071
1072module_init2:
1073 ehca_destroy_slab_caches();
1074
1075module_init1:
1076 ehca_destroy_comp_pool();
1077 return ret;
1078};
1079
1080static void __exit ehca_module_exit(void)
1081{
1082 if (ehca_poll_all_eqs == 1)
1083 del_timer_sync(&poll_eqs_timer);
1084
1085 ibmebus_unregister_driver(&ehca_driver);
1086
1087 unregister_memory_notifier(&ehca_mem_nb);
1088
1089 ehca_destroy_busmap();
1090
1091 ehca_destroy_slab_caches();
1092
1093 ehca_destroy_comp_pool();
1094
1095 idr_destroy(&ehca_cq_idr);
1096 idr_destroy(&ehca_qp_idr);
1097};
1098
1099module_init(ehca_module_init);
1100module_exit(ehca_module_exit);