1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
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 int ehca_open_aqp1 = 0;
63static int ehca_hw_level = 0;
64static int ehca_poll_all_eqs = 1;
65
66int ehca_debug_level = 0;
67int ehca_nr_ports = -1;
68int ehca_use_hp_mr = 0;
69int ehca_port_act_time = 30;
70int ehca_static_rate = -1;
71int 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, bool, 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);
126static DEFINE_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:
155 case H_BUSY:
156 return -EBUSY;
157 case H_NOT_ENOUGH_RESOURCES:
158 case H_CONSTRAINED:
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->node->full_name);
295 loc_code = of_get_property(shca->ofdev->node, "ibm,loc-code", NULL);
296 if (loc_code)
297 ehca_gen_dbg(" ... location lode=%s", loc_code);
298
299 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
300 if (!rblock) {
301 ehca_gen_err("Cannot allocate rblock memory.");
302 return -ENOMEM;
303 }
304
305 h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
306 if (h_ret != H_SUCCESS) {
307 ehca_gen_err("Cannot query device properties. h_ret=%lli",
308 h_ret);
309 ret = -EPERM;
310 goto sense_attributes1;
311 }
312
313 if (ehca_nr_ports == 1)
314 shca->num_ports = 1;
315 else
316 shca->num_ports = (u8)rblock->num_ports;
317
318 ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
319
320 if (ehca_hw_level == 0) {
321 u32 hcaaver;
322 u32 revid;
323
324 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
325 revid = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
326
327 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
328
329 if (hcaaver == 1) {
330 if (revid <= 3)
331 shca->hw_level = 0x10 | (revid + 1);
332 else
333 shca->hw_level = 0x14;
334 } else if (hcaaver == 2) {
335 if (revid == 0)
336 shca->hw_level = 0x21;
337 else if (revid == 0x10)
338 shca->hw_level = 0x22;
339 else if (revid == 0x20 || revid == 0x21)
340 shca->hw_level = 0x23;
341 }
342
343 if (!shca->hw_level) {
344 ehca_gen_warn("unknown hardware version"
345 " - assuming default level");
346 shca->hw_level = 0x22;
347 }
348 } else
349 shca->hw_level = ehca_hw_level;
350 ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
351
352 shca->hca_cap = rblock->hca_cap_indicators;
353 ehca_gen_dbg(" ... HCA capabilities:");
354 for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
355 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
356 ehca_gen_dbg(" %s", hca_cap_descr[i].descr);
357
358
359
360
361 if (ehca_lock_hcalls == -1)
362 ehca_lock_hcalls = !(shca->hca_cap & HCA_CAP_H_ALLOC_RES_SYNC);
363
364
365 shca->hca_cap_mr_pgsize = EHCA_PAGESIZE;
366 for (i = 0; i < ARRAY_SIZE(pgsize_map); i += 2)
367 if (rblock->memory_page_size_supported & pgsize_map[i])
368 shca->hca_cap_mr_pgsize |= pgsize_map[i + 1];
369
370
371 if (shca->max_num_qps == -1)
372 shca->max_num_qps = min_t(int, rblock->max_qp,
373 EHCA_MAX_NUM_QUEUES);
374 else if (shca->max_num_qps < 1 || shca->max_num_qps > rblock->max_qp) {
375 ehca_gen_warn("The requested number of QPs is out of range "
376 "(1 - %i) specified by HW. Value is set to %i",
377 rblock->max_qp, rblock->max_qp);
378 shca->max_num_qps = rblock->max_qp;
379 }
380
381 if (shca->max_num_cqs == -1)
382 shca->max_num_cqs = min_t(int, rblock->max_cq,
383 EHCA_MAX_NUM_QUEUES);
384 else if (shca->max_num_cqs < 1 || shca->max_num_cqs > rblock->max_cq) {
385 ehca_gen_warn("The requested number of CQs is out of range "
386 "(1 - %i) specified by HW. Value is set to %i",
387 rblock->max_cq, rblock->max_cq);
388 }
389
390
391 port = (struct hipz_query_port *)rblock;
392 h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
393 if (h_ret != H_SUCCESS) {
394 ehca_gen_err("Cannot query port properties. h_ret=%lli",
395 h_ret);
396 ret = -EPERM;
397 goto sense_attributes1;
398 }
399
400 shca->max_mtu = port->max_mtu;
401
402sense_attributes1:
403 ehca_free_fw_ctrlblock(rblock);
404 return ret;
405}
406
407static int init_node_guid(struct ehca_shca *shca)
408{
409 int ret = 0;
410 struct hipz_query_hca *rblock;
411
412 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
413 if (!rblock) {
414 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
415 return -ENOMEM;
416 }
417
418 if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
419 ehca_err(&shca->ib_device, "Can't query device properties");
420 ret = -EINVAL;
421 goto init_node_guid1;
422 }
423
424 memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
425
426init_node_guid1:
427 ehca_free_fw_ctrlblock(rblock);
428 return ret;
429}
430
431static int ehca_init_device(struct ehca_shca *shca)
432{
433 int ret;
434
435 ret = init_node_guid(shca);
436 if (ret)
437 return ret;
438
439 strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
440 shca->ib_device.owner = THIS_MODULE;
441
442 shca->ib_device.uverbs_abi_ver = 8;
443 shca->ib_device.uverbs_cmd_mask =
444 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
445 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
446 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
447 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
448 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
449 (1ull << IB_USER_VERBS_CMD_REG_MR) |
450 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
451 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
452 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
453 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
454 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
455 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
456 (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
457 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
458 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) |
459 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
460
461 shca->ib_device.node_type = RDMA_NODE_IB_CA;
462 shca->ib_device.phys_port_cnt = shca->num_ports;
463 shca->ib_device.num_comp_vectors = 1;
464 shca->ib_device.dma_device = &shca->ofdev->dev;
465 shca->ib_device.query_device = ehca_query_device;
466 shca->ib_device.query_port = ehca_query_port;
467 shca->ib_device.query_gid = ehca_query_gid;
468 shca->ib_device.query_pkey = ehca_query_pkey;
469
470 shca->ib_device.modify_port = ehca_modify_port;
471 shca->ib_device.alloc_ucontext = ehca_alloc_ucontext;
472 shca->ib_device.dealloc_ucontext = ehca_dealloc_ucontext;
473 shca->ib_device.alloc_pd = ehca_alloc_pd;
474 shca->ib_device.dealloc_pd = ehca_dealloc_pd;
475 shca->ib_device.create_ah = ehca_create_ah;
476
477 shca->ib_device.query_ah = ehca_query_ah;
478 shca->ib_device.destroy_ah = ehca_destroy_ah;
479 shca->ib_device.create_qp = ehca_create_qp;
480 shca->ib_device.modify_qp = ehca_modify_qp;
481 shca->ib_device.query_qp = ehca_query_qp;
482 shca->ib_device.destroy_qp = ehca_destroy_qp;
483 shca->ib_device.post_send = ehca_post_send;
484 shca->ib_device.post_recv = ehca_post_recv;
485 shca->ib_device.create_cq = ehca_create_cq;
486 shca->ib_device.destroy_cq = ehca_destroy_cq;
487 shca->ib_device.resize_cq = ehca_resize_cq;
488 shca->ib_device.poll_cq = ehca_poll_cq;
489
490 shca->ib_device.req_notify_cq = ehca_req_notify_cq;
491
492 shca->ib_device.get_dma_mr = ehca_get_dma_mr;
493 shca->ib_device.reg_phys_mr = ehca_reg_phys_mr;
494 shca->ib_device.reg_user_mr = ehca_reg_user_mr;
495 shca->ib_device.query_mr = ehca_query_mr;
496 shca->ib_device.dereg_mr = ehca_dereg_mr;
497 shca->ib_device.rereg_phys_mr = ehca_rereg_phys_mr;
498 shca->ib_device.alloc_mw = ehca_alloc_mw;
499 shca->ib_device.bind_mw = ehca_bind_mw;
500 shca->ib_device.dealloc_mw = ehca_dealloc_mw;
501 shca->ib_device.alloc_fmr = ehca_alloc_fmr;
502 shca->ib_device.map_phys_fmr = ehca_map_phys_fmr;
503 shca->ib_device.unmap_fmr = ehca_unmap_fmr;
504 shca->ib_device.dealloc_fmr = ehca_dealloc_fmr;
505 shca->ib_device.attach_mcast = ehca_attach_mcast;
506 shca->ib_device.detach_mcast = ehca_detach_mcast;
507 shca->ib_device.process_mad = ehca_process_mad;
508 shca->ib_device.mmap = ehca_mmap;
509 shca->ib_device.dma_ops = &ehca_dma_mapping_ops;
510
511 if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
512 shca->ib_device.uverbs_cmd_mask |=
513 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
514 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
515 (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
516 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
517
518 shca->ib_device.create_srq = ehca_create_srq;
519 shca->ib_device.modify_srq = ehca_modify_srq;
520 shca->ib_device.query_srq = ehca_query_srq;
521 shca->ib_device.destroy_srq = ehca_destroy_srq;
522 shca->ib_device.post_srq_recv = ehca_post_srq_recv;
523 }
524
525 return ret;
526}
527
528static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
529{
530 struct ehca_sport *sport = &shca->sport[port - 1];
531 struct ib_cq *ibcq;
532 struct ib_qp *ibqp;
533 struct ib_qp_init_attr qp_init_attr;
534 int ret;
535
536 if (sport->ibcq_aqp1) {
537 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
538 return -EPERM;
539 }
540
541 ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void *)(-1), 10, 0);
542 if (IS_ERR(ibcq)) {
543 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
544 return PTR_ERR(ibcq);
545 }
546 sport->ibcq_aqp1 = ibcq;
547
548 if (sport->ibqp_sqp[IB_QPT_GSI]) {
549 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
550 ret = -EPERM;
551 goto create_aqp1;
552 }
553
554 memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
555 qp_init_attr.send_cq = ibcq;
556 qp_init_attr.recv_cq = ibcq;
557 qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
558 qp_init_attr.cap.max_send_wr = 100;
559 qp_init_attr.cap.max_recv_wr = 100;
560 qp_init_attr.cap.max_send_sge = 2;
561 qp_init_attr.cap.max_recv_sge = 1;
562 qp_init_attr.qp_type = IB_QPT_GSI;
563 qp_init_attr.port_num = port;
564 qp_init_attr.qp_context = NULL;
565 qp_init_attr.event_handler = NULL;
566 qp_init_attr.srq = NULL;
567
568 ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
569 if (IS_ERR(ibqp)) {
570 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
571 ret = PTR_ERR(ibqp);
572 goto create_aqp1;
573 }
574 sport->ibqp_sqp[IB_QPT_GSI] = ibqp;
575
576 return 0;
577
578create_aqp1:
579 ib_destroy_cq(sport->ibcq_aqp1);
580 return ret;
581}
582
583static int ehca_destroy_aqp1(struct ehca_sport *sport)
584{
585 int ret;
586
587 ret = ib_destroy_qp(sport->ibqp_sqp[IB_QPT_GSI]);
588 if (ret) {
589 ehca_gen_err("Cannot destroy AQP1 QP. ret=%i", ret);
590 return ret;
591 }
592
593 ret = ib_destroy_cq(sport->ibcq_aqp1);
594 if (ret)
595 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%i", ret);
596
597 return ret;
598}
599
600static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
601{
602 return snprintf(buf, PAGE_SIZE, "%d\n", ehca_debug_level);
603}
604
605static ssize_t ehca_store_debug_level(struct device_driver *ddp,
606 const char *buf, size_t count)
607{
608 int value = (*buf) - '0';
609 if (value >= 0 && value <= 9)
610 ehca_debug_level = value;
611 return 1;
612}
613
614static DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
615 ehca_show_debug_level, ehca_store_debug_level);
616
617static struct attribute *ehca_drv_attrs[] = {
618 &driver_attr_debug_level.attr,
619 NULL
620};
621
622static struct attribute_group ehca_drv_attr_grp = {
623 .attrs = ehca_drv_attrs
624};
625
626static const struct attribute_group *ehca_drv_attr_groups[] = {
627 &ehca_drv_attr_grp,
628 NULL,
629};
630
631#define EHCA_RESOURCE_ATTR(name) \
632static ssize_t ehca_show_##name(struct device *dev, \
633 struct device_attribute *attr, \
634 char *buf) \
635{ \
636 struct ehca_shca *shca; \
637 struct hipz_query_hca *rblock; \
638 int data; \
639 \
640 shca = dev_get_drvdata(dev); \
641 \
642 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL); \
643 if (!rblock) { \
644 dev_err(dev, "Can't allocate rblock memory.\n"); \
645 return 0; \
646 } \
647 \
648 if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
649 dev_err(dev, "Can't query device properties\n"); \
650 ehca_free_fw_ctrlblock(rblock); \
651 return 0; \
652 } \
653 \
654 data = rblock->name; \
655 ehca_free_fw_ctrlblock(rblock); \
656 \
657 if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1)) \
658 return snprintf(buf, 256, "1\n"); \
659 else \
660 return snprintf(buf, 256, "%d\n", data); \
661 \
662} \
663static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
664
665EHCA_RESOURCE_ATTR(num_ports);
666EHCA_RESOURCE_ATTR(hw_ver);
667EHCA_RESOURCE_ATTR(max_eq);
668EHCA_RESOURCE_ATTR(cur_eq);
669EHCA_RESOURCE_ATTR(max_cq);
670EHCA_RESOURCE_ATTR(cur_cq);
671EHCA_RESOURCE_ATTR(max_qp);
672EHCA_RESOURCE_ATTR(cur_qp);
673EHCA_RESOURCE_ATTR(max_mr);
674EHCA_RESOURCE_ATTR(cur_mr);
675EHCA_RESOURCE_ATTR(max_mw);
676EHCA_RESOURCE_ATTR(cur_mw);
677EHCA_RESOURCE_ATTR(max_pd);
678EHCA_RESOURCE_ATTR(max_ah);
679
680static ssize_t ehca_show_adapter_handle(struct device *dev,
681 struct device_attribute *attr,
682 char *buf)
683{
684 struct ehca_shca *shca = dev_get_drvdata(dev);
685
686 return sprintf(buf, "%llx\n", shca->ipz_hca_handle.handle);
687
688}
689static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
690
691static struct attribute *ehca_dev_attrs[] = {
692 &dev_attr_adapter_handle.attr,
693 &dev_attr_num_ports.attr,
694 &dev_attr_hw_ver.attr,
695 &dev_attr_max_eq.attr,
696 &dev_attr_cur_eq.attr,
697 &dev_attr_max_cq.attr,
698 &dev_attr_cur_cq.attr,
699 &dev_attr_max_qp.attr,
700 &dev_attr_cur_qp.attr,
701 &dev_attr_max_mr.attr,
702 &dev_attr_cur_mr.attr,
703 &dev_attr_max_mw.attr,
704 &dev_attr_cur_mw.attr,
705 &dev_attr_max_pd.attr,
706 &dev_attr_max_ah.attr,
707 NULL
708};
709
710static struct attribute_group ehca_dev_attr_grp = {
711 .attrs = ehca_dev_attrs
712};
713
714static int __devinit ehca_probe(struct of_device *dev,
715 const struct of_device_id *id)
716{
717 struct ehca_shca *shca;
718 const u64 *handle;
719 struct ib_pd *ibpd;
720 int ret, i, eq_size;
721 unsigned long flags;
722
723 handle = of_get_property(dev->node, "ibm,hca-handle", NULL);
724 if (!handle) {
725 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
726 dev->node->full_name);
727 return -ENODEV;
728 }
729
730 if (!(*handle)) {
731 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
732 dev->node->full_name);
733 return -ENODEV;
734 }
735
736 shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
737 if (!shca) {
738 ehca_gen_err("Cannot allocate shca memory.");
739 return -ENOMEM;
740 }
741
742 mutex_init(&shca->modify_mutex);
743 atomic_set(&shca->num_cqs, 0);
744 atomic_set(&shca->num_qps, 0);
745 shca->max_num_qps = ehca_max_qp;
746 shca->max_num_cqs = ehca_max_cq;
747
748 for (i = 0; i < ARRAY_SIZE(shca->sport); i++)
749 spin_lock_init(&shca->sport[i].mod_sqp_lock);
750
751 shca->ofdev = dev;
752 shca->ipz_hca_handle.handle = *handle;
753 dev_set_drvdata(&dev->dev, shca);
754
755 ret = ehca_sense_attributes(shca);
756 if (ret < 0) {
757 ehca_gen_err("Cannot sense eHCA attributes.");
758 goto probe1;
759 }
760
761 ret = ehca_init_device(shca);
762 if (ret) {
763 ehca_gen_err("Cannot init ehca device struct");
764 goto probe1;
765 }
766
767 eq_size = 2 * shca->max_num_cqs + 4 * shca->max_num_qps;
768
769 ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, eq_size);
770 if (ret) {
771 ehca_err(&shca->ib_device, "Cannot create EQ.");
772 goto probe1;
773 }
774
775 ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
776 if (ret) {
777 ehca_err(&shca->ib_device, "Cannot create NEQ.");
778 goto probe3;
779 }
780
781
782 ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL);
783 if (IS_ERR(ibpd)) {
784 ehca_err(&shca->ib_device, "Cannot create internal PD.");
785 ret = PTR_ERR(ibpd);
786 goto probe4;
787 }
788
789 shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
790 shca->pd->ib_pd.device = &shca->ib_device;
791
792
793 ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
794
795 if (ret) {
796 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%i",
797 ret);
798 goto probe5;
799 }
800
801 ret = ib_register_device(&shca->ib_device);
802 if (ret) {
803 ehca_err(&shca->ib_device,
804 "ib_register_device() failed ret=%i", ret);
805 goto probe6;
806 }
807
808
809 if (ehca_open_aqp1 == 1) {
810 shca->sport[0].port_state = IB_PORT_DOWN;
811 ret = ehca_create_aqp1(shca, 1);
812 if (ret) {
813 ehca_err(&shca->ib_device,
814 "Cannot create AQP1 for port 1.");
815 goto probe7;
816 }
817 }
818
819
820 if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
821 shca->sport[1].port_state = IB_PORT_DOWN;
822 ret = ehca_create_aqp1(shca, 2);
823 if (ret) {
824 ehca_err(&shca->ib_device,
825 "Cannot create AQP1 for port 2.");
826 goto probe8;
827 }
828 }
829
830 ret = sysfs_create_group(&dev->dev.kobj, &ehca_dev_attr_grp);
831 if (ret)
832 ehca_err(&shca->ib_device,
833 "Cannot create device attributes ret=%d", ret);
834
835 spin_lock_irqsave(&shca_list_lock, flags);
836 list_add(&shca->shca_list, &shca_list);
837 spin_unlock_irqrestore(&shca_list_lock, flags);
838
839 return 0;
840
841probe8:
842 ret = ehca_destroy_aqp1(&shca->sport[0]);
843 if (ret)
844 ehca_err(&shca->ib_device,
845 "Cannot destroy AQP1 for port 1. ret=%i", ret);
846
847probe7:
848 ib_unregister_device(&shca->ib_device);
849
850probe6:
851 ret = ehca_dereg_internal_maxmr(shca);
852 if (ret)
853 ehca_err(&shca->ib_device,
854 "Cannot destroy internal MR. ret=%x", ret);
855
856probe5:
857 ret = ehca_dealloc_pd(&shca->pd->ib_pd);
858 if (ret)
859 ehca_err(&shca->ib_device,
860 "Cannot destroy internal PD. ret=%x", ret);
861
862probe4:
863 ret = ehca_destroy_eq(shca, &shca->neq);
864 if (ret)
865 ehca_err(&shca->ib_device,
866 "Cannot destroy NEQ. ret=%x", ret);
867
868probe3:
869 ret = ehca_destroy_eq(shca, &shca->eq);
870 if (ret)
871 ehca_err(&shca->ib_device,
872 "Cannot destroy EQ. ret=%x", ret);
873
874probe1:
875 ib_dealloc_device(&shca->ib_device);
876
877 return -EINVAL;
878}
879
880static int __devexit ehca_remove(struct of_device *dev)
881{
882 struct ehca_shca *shca = dev_get_drvdata(&dev->dev);
883 unsigned long flags;
884 int ret;
885
886 sysfs_remove_group(&dev->dev.kobj, &ehca_dev_attr_grp);
887
888 if (ehca_open_aqp1 == 1) {
889 int i;
890 for (i = 0; i < shca->num_ports; i++) {
891 ret = ehca_destroy_aqp1(&shca->sport[i]);
892 if (ret)
893 ehca_err(&shca->ib_device,
894 "Cannot destroy AQP1 for port %x "
895 "ret=%i", ret, i);
896 }
897 }
898
899 ib_unregister_device(&shca->ib_device);
900
901 ret = ehca_dereg_internal_maxmr(shca);
902 if (ret)
903 ehca_err(&shca->ib_device,
904 "Cannot destroy internal MR. ret=%i", ret);
905
906 ret = ehca_dealloc_pd(&shca->pd->ib_pd);
907 if (ret)
908 ehca_err(&shca->ib_device,
909 "Cannot destroy internal PD. ret=%i", ret);
910
911 ret = ehca_destroy_eq(shca, &shca->eq);
912 if (ret)
913 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%i", ret);
914
915 ret = ehca_destroy_eq(shca, &shca->neq);
916 if (ret)
917 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%i", ret);
918
919 ib_dealloc_device(&shca->ib_device);
920
921 spin_lock_irqsave(&shca_list_lock, flags);
922 list_del(&shca->shca_list);
923 spin_unlock_irqrestore(&shca_list_lock, flags);
924
925 return ret;
926}
927
928static struct of_device_id ehca_device_table[] =
929{
930 {
931 .name = "lhca",
932 .compatible = "IBM,lhca",
933 },
934 {},
935};
936MODULE_DEVICE_TABLE(of, ehca_device_table);
937
938static struct of_platform_driver ehca_driver = {
939 .name = "ehca",
940 .match_table = ehca_device_table,
941 .probe = ehca_probe,
942 .remove = ehca_remove,
943 .driver = {
944 .groups = ehca_drv_attr_groups,
945 },
946};
947
948void ehca_poll_eqs(unsigned long data)
949{
950 struct ehca_shca *shca;
951
952 spin_lock(&shca_list_lock);
953 list_for_each_entry(shca, &shca_list, shca_list) {
954 if (shca->eq.is_initialized) {
955
956 struct ehca_eq *eq = &shca->eq;
957 int max = 3;
958 volatile u64 q_ofs, q_ofs2;
959 unsigned long flags;
960 spin_lock_irqsave(&eq->spinlock, flags);
961 q_ofs = eq->ipz_queue.current_q_offset;
962 spin_unlock_irqrestore(&eq->spinlock, flags);
963 do {
964 spin_lock_irqsave(&eq->spinlock, flags);
965 q_ofs2 = eq->ipz_queue.current_q_offset;
966 spin_unlock_irqrestore(&eq->spinlock, flags);
967 max--;
968 } while (q_ofs == q_ofs2 && max > 0);
969 if (q_ofs == q_ofs2)
970 ehca_process_eq(shca, 0);
971 }
972 }
973 mod_timer(&poll_eqs_timer, round_jiffies(jiffies + HZ));
974 spin_unlock(&shca_list_lock);
975}
976
977static int ehca_mem_notifier(struct notifier_block *nb,
978 unsigned long action, void *data)
979{
980 static unsigned long ehca_dmem_warn_time;
981 unsigned long flags;
982
983 switch (action) {
984 case MEM_CANCEL_OFFLINE:
985 case MEM_CANCEL_ONLINE:
986 case MEM_ONLINE:
987 case MEM_OFFLINE:
988 return NOTIFY_OK;
989 case MEM_GOING_ONLINE:
990 case MEM_GOING_OFFLINE:
991
992 spin_lock_irqsave(&shca_list_lock, flags);
993 if (list_empty(&shca_list)) {
994 spin_unlock_irqrestore(&shca_list_lock, flags);
995 return NOTIFY_OK;
996 } else {
997 spin_unlock_irqrestore(&shca_list_lock, flags);
998 if (printk_timed_ratelimit(&ehca_dmem_warn_time,
999 30 * 1000))
1000 ehca_gen_err("DMEM operations are not allowed"
1001 "in conjunction with eHCA");
1002 return NOTIFY_BAD;
1003 }
1004 }
1005 return NOTIFY_OK;
1006}
1007
1008static struct notifier_block ehca_mem_nb = {
1009 .notifier_call = ehca_mem_notifier,
1010};
1011
1012static int __init ehca_module_init(void)
1013{
1014 int ret;
1015
1016 printk(KERN_INFO "eHCA Infiniband Device Driver "
1017 "(Version " HCAD_VERSION ")\n");
1018
1019 ret = ehca_create_comp_pool();
1020 if (ret) {
1021 ehca_gen_err("Cannot create comp pool.");
1022 return ret;
1023 }
1024
1025 ret = ehca_create_slab_caches();
1026 if (ret) {
1027 ehca_gen_err("Cannot create SLAB caches");
1028 ret = -ENOMEM;
1029 goto module_init1;
1030 }
1031
1032 ret = ehca_create_busmap();
1033 if (ret) {
1034 ehca_gen_err("Cannot create busmap.");
1035 goto module_init2;
1036 }
1037
1038 ret = ibmebus_register_driver(&ehca_driver);
1039 if (ret) {
1040 ehca_gen_err("Cannot register eHCA device driver");
1041 ret = -EINVAL;
1042 goto module_init3;
1043 }
1044
1045 ret = register_memory_notifier(&ehca_mem_nb);
1046 if (ret) {
1047 ehca_gen_err("Failed registering memory add/remove notifier");
1048 goto module_init4;
1049 }
1050
1051 if (ehca_poll_all_eqs != 1) {
1052 ehca_gen_err("WARNING!!!");
1053 ehca_gen_err("It is possible to lose interrupts.");
1054 } else {
1055 init_timer(&poll_eqs_timer);
1056 poll_eqs_timer.function = ehca_poll_eqs;
1057 poll_eqs_timer.expires = jiffies + HZ;
1058 add_timer(&poll_eqs_timer);
1059 }
1060
1061 return 0;
1062
1063module_init4:
1064 ibmebus_unregister_driver(&ehca_driver);
1065
1066module_init3:
1067 ehca_destroy_busmap();
1068
1069module_init2:
1070 ehca_destroy_slab_caches();
1071
1072module_init1:
1073 ehca_destroy_comp_pool();
1074 return ret;
1075};
1076
1077static void __exit ehca_module_exit(void)
1078{
1079 if (ehca_poll_all_eqs == 1)
1080 del_timer_sync(&poll_eqs_timer);
1081
1082 ibmebus_unregister_driver(&ehca_driver);
1083
1084 unregister_memory_notifier(&ehca_mem_nb);
1085
1086 ehca_destroy_busmap();
1087
1088 ehca_destroy_slab_caches();
1089
1090 ehca_destroy_comp_pool();
1091
1092 idr_destroy(&ehca_cq_idr);
1093 idr_destroy(&ehca_qp_idr);
1094};
1095
1096module_init(ehca_module_init);
1097module_exit(ehca_module_exit);
1098
