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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 <rdma/ib_mad.h>
50#include "ehca_classes.h"
51#include "ehca_iverbs.h"
52#include "ehca_mrmw.h"
53#include "ehca_tools.h"
54#include "hcp_if.h"
55
56#define HCAD_VERSION "0029"
57
58MODULE_LICENSE("Dual BSD/GPL");
59MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
60MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver");
61MODULE_VERSION(HCAD_VERSION);
62
63static bool ehca_open_aqp1 = 0;
64static int ehca_hw_level = 0;
65static bool ehca_poll_all_eqs = 1;
66
67int ehca_debug_level = 0;
68int ehca_nr_ports = -1;
69bool ehca_use_hp_mr = 0;
70int ehca_port_act_time = 30;
71int ehca_static_rate = -1;
72bool ehca_scaling_code = 0;
73int ehca_lock_hcalls = -1;
74int ehca_max_cq = -1;
75int ehca_max_qp = -1;
76
77module_param_named(open_aqp1, ehca_open_aqp1, bool, S_IRUGO);
78module_param_named(debug_level, ehca_debug_level, int, S_IRUGO);
79module_param_named(hw_level, ehca_hw_level, int, S_IRUGO);
80module_param_named(nr_ports, ehca_nr_ports, int, S_IRUGO);
81module_param_named(use_hp_mr, ehca_use_hp_mr, bool, S_IRUGO);
82module_param_named(port_act_time, ehca_port_act_time, int, S_IRUGO);
83module_param_named(poll_all_eqs, ehca_poll_all_eqs, bool, S_IRUGO);
84module_param_named(static_rate, ehca_static_rate, int, S_IRUGO);
85module_param_named(scaling_code, ehca_scaling_code, bool, S_IRUGO);
86module_param_named(lock_hcalls, ehca_lock_hcalls, bint, S_IRUGO);
87module_param_named(number_of_cqs, ehca_max_cq, int, S_IRUGO);
88module_param_named(number_of_qps, ehca_max_qp, int, S_IRUGO);
89
90MODULE_PARM_DESC(open_aqp1,
91 "Open AQP1 on startup (default: no)");
92MODULE_PARM_DESC(debug_level,
93 "Amount of debug output (0: none (default), 1: traces, "
94 "2: some dumps, 3: lots)");
95MODULE_PARM_DESC(hw_level,
96 "Hardware level (0: autosensing (default), "
97 "0x10..0x14: eHCA, 0x20..0x23: eHCA2)");
98MODULE_PARM_DESC(nr_ports,
99 "number of connected ports (-1: autodetect (default), "
100 "1: port one only, 2: two ports)");
101MODULE_PARM_DESC(use_hp_mr,
102 "Use high performance MRs (default: no)");
103MODULE_PARM_DESC(port_act_time,
104 "Time to wait for port activation (default: 30 sec)");
105MODULE_PARM_DESC(poll_all_eqs,
106 "Poll all event queues periodically (default: yes)");
107MODULE_PARM_DESC(static_rate,
108 "Set permanent static rate (default: no static rate)");
109MODULE_PARM_DESC(scaling_code,
110 "Enable scaling code (default: no)");
111MODULE_PARM_DESC(lock_hcalls,
112 "Serialize all hCalls made by the driver "
113 "(default: autodetect)");
114MODULE_PARM_DESC(number_of_cqs,
115 "Max number of CQs which can be allocated "
116 "(default: autodetect)");
117MODULE_PARM_DESC(number_of_qps,
118 "Max number of QPs which can be allocated "
119 "(default: autodetect)");
120
121DEFINE_RWLOCK(ehca_qp_idr_lock);
122DEFINE_RWLOCK(ehca_cq_idr_lock);
123DEFINE_IDR(ehca_qp_idr);
124DEFINE_IDR(ehca_cq_idr);
125
126static LIST_HEAD(shca_list);
127DEFINE_SPINLOCK(shca_list_lock);
128
129static struct timer_list poll_eqs_timer;
130
131#ifdef CONFIG_PPC_64K_PAGES
132static struct kmem_cache *ctblk_cache;
133
134void *ehca_alloc_fw_ctrlblock(gfp_t flags)
135{
136 void *ret = kmem_cache_zalloc(ctblk_cache, flags);
137 if (!ret)
138 ehca_gen_err("Out of memory for ctblk");
139 return ret;
140}
141
142void ehca_free_fw_ctrlblock(void *ptr)
143{
144 if (ptr)
145 kmem_cache_free(ctblk_cache, ptr);
146
147}
148#endif
149
150int ehca2ib_return_code(u64 ehca_rc)
151{
152 switch (ehca_rc) {
153 case H_SUCCESS:
154 return 0;
155 case H_RESOURCE:
156 case H_BUSY:
157 return -EBUSY;
158 case H_NOT_ENOUGH_RESOURCES:
159 case H_CONSTRAINED:
160 case H_NO_MEM:
161 return -ENOMEM;
162 default:
163 return -EINVAL;
164 }
165}
166
167static int ehca_create_slab_caches(void)
168{
169 int ret;
170
171 ret = ehca_init_pd_cache();
172 if (ret) {
173 ehca_gen_err("Cannot create PD SLAB cache.");
174 return ret;
175 }
176
177 ret = ehca_init_cq_cache();
178 if (ret) {
179 ehca_gen_err("Cannot create CQ SLAB cache.");
180 goto create_slab_caches2;
181 }
182
183 ret = ehca_init_qp_cache();
184 if (ret) {
185 ehca_gen_err("Cannot create QP SLAB cache.");
186 goto create_slab_caches3;
187 }
188
189 ret = ehca_init_av_cache();
190 if (ret) {
191 ehca_gen_err("Cannot create AV SLAB cache.");
192 goto create_slab_caches4;
193 }
194
195 ret = ehca_init_mrmw_cache();
196 if (ret) {
197 ehca_gen_err("Cannot create MR&MW SLAB cache.");
198 goto create_slab_caches5;
199 }
200
201 ret = ehca_init_small_qp_cache();
202 if (ret) {
203 ehca_gen_err("Cannot create small queue SLAB cache.");
204 goto create_slab_caches6;
205 }
206
207#ifdef CONFIG_PPC_64K_PAGES
208 ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
209 EHCA_PAGESIZE, H_CB_ALIGNMENT,
210 SLAB_HWCACHE_ALIGN,
211 NULL);
212 if (!ctblk_cache) {
213 ehca_gen_err("Cannot create ctblk SLAB cache.");
214 ehca_cleanup_small_qp_cache();
215 ret = -ENOMEM;
216 goto create_slab_caches6;
217 }
218#endif
219 return 0;
220
221create_slab_caches6:
222 ehca_cleanup_mrmw_cache();
223
224create_slab_caches5:
225 ehca_cleanup_av_cache();
226
227create_slab_caches4:
228 ehca_cleanup_qp_cache();
229
230create_slab_caches3:
231 ehca_cleanup_cq_cache();
232
233create_slab_caches2:
234 ehca_cleanup_pd_cache();
235
236 return ret;
237}
238
239static void ehca_destroy_slab_caches(void)
240{
241 ehca_cleanup_small_qp_cache();
242 ehca_cleanup_mrmw_cache();
243 ehca_cleanup_av_cache();
244 ehca_cleanup_qp_cache();
245 ehca_cleanup_cq_cache();
246 ehca_cleanup_pd_cache();
247#ifdef CONFIG_PPC_64K_PAGES
248 if (ctblk_cache)
249 kmem_cache_destroy(ctblk_cache);
250#endif
251}
252
253#define EHCA_HCAAVER EHCA_BMASK_IBM(32, 39)
254#define EHCA_REVID EHCA_BMASK_IBM(40, 63)
255
256static struct cap_descr {
257 u64 mask;
258 char *descr;
259} hca_cap_descr[] = {
260 { HCA_CAP_AH_PORT_NR_CHECK, "HCA_CAP_AH_PORT_NR_CHECK" },
261 { HCA_CAP_ATOMIC, "HCA_CAP_ATOMIC" },
262 { HCA_CAP_AUTO_PATH_MIG, "HCA_CAP_AUTO_PATH_MIG" },
263 { HCA_CAP_BAD_P_KEY_CTR, "HCA_CAP_BAD_P_KEY_CTR" },
264 { HCA_CAP_SQD_RTS_PORT_CHANGE, "HCA_CAP_SQD_RTS_PORT_CHANGE" },
265 { HCA_CAP_CUR_QP_STATE_MOD, "HCA_CAP_CUR_QP_STATE_MOD" },
266 { HCA_CAP_INIT_TYPE, "HCA_CAP_INIT_TYPE" },
267 { HCA_CAP_PORT_ACTIVE_EVENT, "HCA_CAP_PORT_ACTIVE_EVENT" },
268 { HCA_CAP_Q_KEY_VIOL_CTR, "HCA_CAP_Q_KEY_VIOL_CTR" },
269 { HCA_CAP_WQE_RESIZE, "HCA_CAP_WQE_RESIZE" },
270 { HCA_CAP_RAW_PACKET_MCAST, "HCA_CAP_RAW_PACKET_MCAST" },
271 { HCA_CAP_SHUTDOWN_PORT, "HCA_CAP_SHUTDOWN_PORT" },
272 { HCA_CAP_RC_LL_QP, "HCA_CAP_RC_LL_QP" },
273 { HCA_CAP_SRQ, "HCA_CAP_SRQ" },
274 { HCA_CAP_UD_LL_QP, "HCA_CAP_UD_LL_QP" },
275 { HCA_CAP_RESIZE_MR, "HCA_CAP_RESIZE_MR" },
276 { HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" },
277 { HCA_CAP_H_ALLOC_RES_SYNC, "HCA_CAP_H_ALLOC_RES_SYNC" },
278};
279
280static int ehca_sense_attributes(struct ehca_shca *shca)
281{
282 int i, ret = 0;
283 u64 h_ret;
284 struct hipz_query_hca *rblock;
285 struct hipz_query_port *port;
286 const char *loc_code;
287
288 static const u32 pgsize_map[] = {
289 HCA_CAP_MR_PGSIZE_4K, 0x1000,
290 HCA_CAP_MR_PGSIZE_64K, 0x10000,
291 HCA_CAP_MR_PGSIZE_1M, 0x100000,
292 HCA_CAP_MR_PGSIZE_16M, 0x1000000,
293 };
294
295 ehca_gen_dbg("Probing adapter %s...",
296 shca->ofdev->dev.of_node->full_name);
297 loc_code = of_get_property(shca->ofdev->dev.of_node, "ibm,loc-code",
298 NULL);
299 if (loc_code)
300 ehca_gen_dbg(" ... location lode=%s", loc_code);
301
302 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
303 if (!rblock) {
304 ehca_gen_err("Cannot allocate rblock memory.");
305 return -ENOMEM;
306 }
307
308 h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
309 if (h_ret != H_SUCCESS) {
310 ehca_gen_err("Cannot query device properties. h_ret=%lli",
311 h_ret);
312 ret = -EPERM;
313 goto sense_attributes1;
314 }
315
316 if (ehca_nr_ports == 1)
317 shca->num_ports = 1;
318 else
319 shca->num_ports = (u8)rblock->num_ports;
320
321 ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
322
323 if (ehca_hw_level == 0) {
324 u32 hcaaver;
325 u32 revid;
326
327 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
328 revid = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
329
330 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
331
332 if (hcaaver == 1) {
333 if (revid <= 3)
334 shca->hw_level = 0x10 | (revid + 1);
335 else
336 shca->hw_level = 0x14;
337 } else if (hcaaver == 2) {
338 if (revid == 0)
339 shca->hw_level = 0x21;
340 else if (revid == 0x10)
341 shca->hw_level = 0x22;
342 else if (revid == 0x20 || revid == 0x21)
343 shca->hw_level = 0x23;
344 }
345
346 if (!shca->hw_level) {
347 ehca_gen_warn("unknown hardware version"
348 " - assuming default level");
349 shca->hw_level = 0x22;
350 }
351 } else
352 shca->hw_level = ehca_hw_level;
353 ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
354
355 shca->hca_cap = rblock->hca_cap_indicators;
356 ehca_gen_dbg(" ... HCA capabilities:");
357 for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
358 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
359 ehca_gen_dbg(" %s", hca_cap_descr[i].descr);
360
361
362
363
364 if (ehca_lock_hcalls == -1)
365 ehca_lock_hcalls = !EHCA_BMASK_GET(HCA_CAP_H_ALLOC_RES_SYNC,
366 shca->hca_cap);
367
368
369 shca->hca_cap_mr_pgsize = EHCA_PAGESIZE;
370 for (i = 0; i < ARRAY_SIZE(pgsize_map); i += 2)
371 if (rblock->memory_page_size_supported & pgsize_map[i])
372 shca->hca_cap_mr_pgsize |= pgsize_map[i + 1];
373
374
375 if (shca->max_num_qps == -1)
376 shca->max_num_qps = min_t(int, rblock->max_qp,
377 EHCA_MAX_NUM_QUEUES);
378 else if (shca->max_num_qps < 1 || shca->max_num_qps > rblock->max_qp) {
379 ehca_gen_warn("The requested number of QPs is out of range "
380 "(1 - %i) specified by HW. Value is set to %i",
381 rblock->max_qp, rblock->max_qp);
382 shca->max_num_qps = rblock->max_qp;
383 }
384
385 if (shca->max_num_cqs == -1)
386 shca->max_num_cqs = min_t(int, rblock->max_cq,
387 EHCA_MAX_NUM_QUEUES);
388 else if (shca->max_num_cqs < 1 || shca->max_num_cqs > rblock->max_cq) {
389 ehca_gen_warn("The requested number of CQs is out of range "
390 "(1 - %i) specified by HW. Value is set to %i",
391 rblock->max_cq, rblock->max_cq);
392 }
393
394
395 port = (struct hipz_query_port *)rblock;
396 h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
397 if (h_ret != H_SUCCESS) {
398 ehca_gen_err("Cannot query port properties. h_ret=%lli",
399 h_ret);
400 ret = -EPERM;
401 goto sense_attributes1;
402 }
403
404 shca->max_mtu = port->max_mtu;
405
406sense_attributes1:
407 ehca_free_fw_ctrlblock(rblock);
408 return ret;
409}
410
411static int init_node_guid(struct ehca_shca *shca)
412{
413 int ret = 0;
414 struct hipz_query_hca *rblock;
415
416 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
417 if (!rblock) {
418 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
419 return -ENOMEM;
420 }
421
422 if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
423 ehca_err(&shca->ib_device, "Can't query device properties");
424 ret = -EINVAL;
425 goto init_node_guid1;
426 }
427
428 memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
429
430init_node_guid1:
431 ehca_free_fw_ctrlblock(rblock);
432 return ret;
433}
434
435static int ehca_port_immutable(struct ib_device *ibdev, u8 port_num,
436 struct ib_port_immutable *immutable)
437{
438 struct ib_port_attr attr;
439 int err;
440
441 err = ehca_query_port(ibdev, port_num, &attr);
442 if (err)
443 return err;
444
445 immutable->pkey_tbl_len = attr.pkey_tbl_len;
446 immutable->gid_tbl_len = attr.gid_tbl_len;
447 immutable->core_cap_flags = RDMA_CORE_PORT_IBA_IB;
448 immutable->max_mad_size = IB_MGMT_MAD_SIZE;
449
450 return 0;
451}
452
453static int ehca_init_device(struct ehca_shca *shca)
454{
455 int ret;
456
457 ret = init_node_guid(shca);
458 if (ret)
459 return ret;
460
461 strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
462 shca->ib_device.owner = THIS_MODULE;
463
464 shca->ib_device.uverbs_abi_ver = 8;
465 shca->ib_device.uverbs_cmd_mask =
466 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
467 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
468 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
469 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
470 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
471 (1ull << IB_USER_VERBS_CMD_REG_MR) |
472 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
473 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
474 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
475 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
476 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
477 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
478 (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
479 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
480 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) |
481 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
482
483 shca->ib_device.node_type = RDMA_NODE_IB_CA;
484 shca->ib_device.phys_port_cnt = shca->num_ports;
485 shca->ib_device.num_comp_vectors = 1;
486 shca->ib_device.dma_device = &shca->ofdev->dev;
487 shca->ib_device.query_device = ehca_query_device;
488 shca->ib_device.query_port = ehca_query_port;
489 shca->ib_device.query_gid = ehca_query_gid;
490 shca->ib_device.query_pkey = ehca_query_pkey;
491
492 shca->ib_device.modify_port = ehca_modify_port;
493 shca->ib_device.alloc_ucontext = ehca_alloc_ucontext;
494 shca->ib_device.dealloc_ucontext = ehca_dealloc_ucontext;
495 shca->ib_device.alloc_pd = ehca_alloc_pd;
496 shca->ib_device.dealloc_pd = ehca_dealloc_pd;
497 shca->ib_device.create_ah = ehca_create_ah;
498
499 shca->ib_device.query_ah = ehca_query_ah;
500 shca->ib_device.destroy_ah = ehca_destroy_ah;
501 shca->ib_device.create_qp = ehca_create_qp;
502 shca->ib_device.modify_qp = ehca_modify_qp;
503 shca->ib_device.query_qp = ehca_query_qp;
504 shca->ib_device.destroy_qp = ehca_destroy_qp;
505 shca->ib_device.post_send = ehca_post_send;
506 shca->ib_device.post_recv = ehca_post_recv;
507 shca->ib_device.create_cq = ehca_create_cq;
508 shca->ib_device.destroy_cq = ehca_destroy_cq;
509 shca->ib_device.resize_cq = ehca_resize_cq;
510 shca->ib_device.poll_cq = ehca_poll_cq;
511
512 shca->ib_device.req_notify_cq = ehca_req_notify_cq;
513
514 shca->ib_device.get_dma_mr = ehca_get_dma_mr;
515 shca->ib_device.reg_phys_mr = ehca_reg_phys_mr;
516 shca->ib_device.reg_user_mr = ehca_reg_user_mr;
517 shca->ib_device.query_mr = ehca_query_mr;
518 shca->ib_device.dereg_mr = ehca_dereg_mr;
519 shca->ib_device.rereg_phys_mr = ehca_rereg_phys_mr;
520 shca->ib_device.alloc_mw = ehca_alloc_mw;
521 shca->ib_device.bind_mw = ehca_bind_mw;
522 shca->ib_device.dealloc_mw = ehca_dealloc_mw;
523 shca->ib_device.alloc_fmr = ehca_alloc_fmr;
524 shca->ib_device.map_phys_fmr = ehca_map_phys_fmr;
525 shca->ib_device.unmap_fmr = ehca_unmap_fmr;
526 shca->ib_device.dealloc_fmr = ehca_dealloc_fmr;
527 shca->ib_device.attach_mcast = ehca_attach_mcast;
528 shca->ib_device.detach_mcast = ehca_detach_mcast;
529 shca->ib_device.process_mad = ehca_process_mad;
530 shca->ib_device.mmap = ehca_mmap;
531 shca->ib_device.dma_ops = &ehca_dma_mapping_ops;
532 shca->ib_device.get_port_immutable = ehca_port_immutable;
533
534 if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
535 shca->ib_device.uverbs_cmd_mask |=
536 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
537 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
538 (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
539 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
540
541 shca->ib_device.create_srq = ehca_create_srq;
542 shca->ib_device.modify_srq = ehca_modify_srq;
543 shca->ib_device.query_srq = ehca_query_srq;
544 shca->ib_device.destroy_srq = ehca_destroy_srq;
545 shca->ib_device.post_srq_recv = ehca_post_srq_recv;
546 }
547
548 return ret;
549}
550
551static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
552{
553 struct ehca_sport *sport = &shca->sport[port - 1];
554 struct ib_cq *ibcq;
555 struct ib_qp *ibqp;
556 struct ib_qp_init_attr qp_init_attr;
557 struct ib_cq_init_attr cq_attr = {};
558 int ret;
559
560 if (sport->ibcq_aqp1) {
561 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
562 return -EPERM;
563 }
564
565 cq_attr.cqe = 10;
566 ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void *)(-1),
567 &cq_attr);
568 if (IS_ERR(ibcq)) {
569 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
570 return PTR_ERR(ibcq);
571 }
572 sport->ibcq_aqp1 = ibcq;
573
574 if (sport->ibqp_sqp[IB_QPT_GSI]) {
575 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
576 ret = -EPERM;
577 goto create_aqp1;
578 }
579
580 memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
581 qp_init_attr.send_cq = ibcq;
582 qp_init_attr.recv_cq = ibcq;
583 qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
584 qp_init_attr.cap.max_send_wr = 100;
585 qp_init_attr.cap.max_recv_wr = 100;
586 qp_init_attr.cap.max_send_sge = 2;
587 qp_init_attr.cap.max_recv_sge = 1;
588 qp_init_attr.qp_type = IB_QPT_GSI;
589 qp_init_attr.port_num = port;
590 qp_init_attr.qp_context = NULL;
591 qp_init_attr.event_handler = NULL;
592 qp_init_attr.srq = NULL;
593
594 ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
595 if (IS_ERR(ibqp)) {
596 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
597 ret = PTR_ERR(ibqp);
598 goto create_aqp1;
599 }
600 sport->ibqp_sqp[IB_QPT_GSI] = ibqp;
601
602 return 0;
603
604create_aqp1:
605 ib_destroy_cq(sport->ibcq_aqp1);
606 return ret;
607}
608
609static int ehca_destroy_aqp1(struct ehca_sport *sport)
610{
611 int ret;
612
613 ret = ib_destroy_qp(sport->ibqp_sqp[IB_QPT_GSI]);
614 if (ret) {
615 ehca_gen_err("Cannot destroy AQP1 QP. ret=%i", ret);
616 return ret;
617 }
618
619 ret = ib_destroy_cq(sport->ibcq_aqp1);
620 if (ret)
621 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%i", ret);
622
623 return ret;
624}
625
626static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
627{
628 return snprintf(buf, PAGE_SIZE, "%d\n", ehca_debug_level);
629}
630
631static ssize_t ehca_store_debug_level(struct device_driver *ddp,
632 const char *buf, size_t count)
633{
634 int value = (*buf) - '0';
635 if (value >= 0 && value <= 9)
636 ehca_debug_level = value;
637 return 1;
638}
639
640static DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
641 ehca_show_debug_level, ehca_store_debug_level);
642
643static struct attribute *ehca_drv_attrs[] = {
644 &driver_attr_debug_level.attr,
645 NULL
646};
647
648static struct attribute_group ehca_drv_attr_grp = {
649 .attrs = ehca_drv_attrs
650};
651
652static const struct attribute_group *ehca_drv_attr_groups[] = {
653 &ehca_drv_attr_grp,
654 NULL,
655};
656
657#define EHCA_RESOURCE_ATTR(name) \
658static ssize_t ehca_show_##name(struct device *dev, \
659 struct device_attribute *attr, \
660 char *buf) \
661{ \
662 struct ehca_shca *shca; \
663 struct hipz_query_hca *rblock; \
664 int data; \
665 \
666 shca = dev_get_drvdata(dev); \
667 \
668 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL); \
669 if (!rblock) { \
670 dev_err(dev, "Can't allocate rblock memory.\n"); \
671 return 0; \
672 } \
673 \
674 if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
675 dev_err(dev, "Can't query device properties\n"); \
676 ehca_free_fw_ctrlblock(rblock); \
677 return 0; \
678 } \
679 \
680 data = rblock->name; \
681 ehca_free_fw_ctrlblock(rblock); \
682 \
683 if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1)) \
684 return snprintf(buf, 256, "1\n"); \
685 else \
686 return snprintf(buf, 256, "%d\n", data); \
687 \
688} \
689static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
690
691EHCA_RESOURCE_ATTR(num_ports);
692EHCA_RESOURCE_ATTR(hw_ver);
693EHCA_RESOURCE_ATTR(max_eq);
694EHCA_RESOURCE_ATTR(cur_eq);
695EHCA_RESOURCE_ATTR(max_cq);
696EHCA_RESOURCE_ATTR(cur_cq);
697EHCA_RESOURCE_ATTR(max_qp);
698EHCA_RESOURCE_ATTR(cur_qp);
699EHCA_RESOURCE_ATTR(max_mr);
700EHCA_RESOURCE_ATTR(cur_mr);
701EHCA_RESOURCE_ATTR(max_mw);
702EHCA_RESOURCE_ATTR(cur_mw);
703EHCA_RESOURCE_ATTR(max_pd);
704EHCA_RESOURCE_ATTR(max_ah);
705
706static ssize_t ehca_show_adapter_handle(struct device *dev,
707 struct device_attribute *attr,
708 char *buf)
709{
710 struct ehca_shca *shca = dev_get_drvdata(dev);
711
712 return sprintf(buf, "%llx\n", shca->ipz_hca_handle.handle);
713
714}
715static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
716
717static struct attribute *ehca_dev_attrs[] = {
718 &dev_attr_adapter_handle.attr,
719 &dev_attr_num_ports.attr,
720 &dev_attr_hw_ver.attr,
721 &dev_attr_max_eq.attr,
722 &dev_attr_cur_eq.attr,
723 &dev_attr_max_cq.attr,
724 &dev_attr_cur_cq.attr,
725 &dev_attr_max_qp.attr,
726 &dev_attr_cur_qp.attr,
727 &dev_attr_max_mr.attr,
728 &dev_attr_cur_mr.attr,
729 &dev_attr_max_mw.attr,
730 &dev_attr_cur_mw.attr,
731 &dev_attr_max_pd.attr,
732 &dev_attr_max_ah.attr,
733 NULL
734};
735
736static struct attribute_group ehca_dev_attr_grp = {
737 .attrs = ehca_dev_attrs
738};
739
740static int ehca_probe(struct platform_device *dev)
741{
742 struct ehca_shca *shca;
743 const u64 *handle;
744 struct ib_pd *ibpd;
745 int ret, i, eq_size;
746 unsigned long flags;
747
748 handle = of_get_property(dev->dev.of_node, "ibm,hca-handle", NULL);
749 if (!handle) {
750 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
751 dev->dev.of_node->full_name);
752 return -ENODEV;
753 }
754
755 if (!(*handle)) {
756 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
757 dev->dev.of_node->full_name);
758 return -ENODEV;
759 }
760
761 shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
762 if (!shca) {
763 ehca_gen_err("Cannot allocate shca memory.");
764 return -ENOMEM;
765 }
766
767 mutex_init(&shca->modify_mutex);
768 atomic_set(&shca->num_cqs, 0);
769 atomic_set(&shca->num_qps, 0);
770 shca->max_num_qps = ehca_max_qp;
771 shca->max_num_cqs = ehca_max_cq;
772
773 for (i = 0; i < ARRAY_SIZE(shca->sport); i++)
774 spin_lock_init(&shca->sport[i].mod_sqp_lock);
775
776 shca->ofdev = dev;
777 shca->ipz_hca_handle.handle = *handle;
778 dev_set_drvdata(&dev->dev, shca);
779
780 ret = ehca_sense_attributes(shca);
781 if (ret < 0) {
782 ehca_gen_err("Cannot sense eHCA attributes.");
783 goto probe1;
784 }
785
786 ret = ehca_init_device(shca);
787 if (ret) {
788 ehca_gen_err("Cannot init ehca device struct");
789 goto probe1;
790 }
791
792 eq_size = 2 * shca->max_num_cqs + 4 * shca->max_num_qps;
793
794 ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, eq_size);
795 if (ret) {
796 ehca_err(&shca->ib_device, "Cannot create EQ.");
797 goto probe1;
798 }
799
800 ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
801 if (ret) {
802 ehca_err(&shca->ib_device, "Cannot create NEQ.");
803 goto probe3;
804 }
805
806
807 ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL);
808 if (IS_ERR(ibpd)) {
809 ehca_err(&shca->ib_device, "Cannot create internal PD.");
810 ret = PTR_ERR(ibpd);
811 goto probe4;
812 }
813
814 shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
815 shca->pd->ib_pd.device = &shca->ib_device;
816
817
818 ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
819
820 if (ret) {
821 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%i",
822 ret);
823 goto probe5;
824 }
825
826 ret = ib_register_device(&shca->ib_device, NULL);
827 if (ret) {
828 ehca_err(&shca->ib_device,
829 "ib_register_device() failed ret=%i", ret);
830 goto probe6;
831 }
832
833
834 if (ehca_open_aqp1 == 1) {
835 shca->sport[0].port_state = IB_PORT_DOWN;
836 ret = ehca_create_aqp1(shca, 1);
837 if (ret) {
838 ehca_err(&shca->ib_device,
839 "Cannot create AQP1 for port 1.");
840 goto probe7;
841 }
842 }
843
844
845 if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
846 shca->sport[1].port_state = IB_PORT_DOWN;
847 ret = ehca_create_aqp1(shca, 2);
848 if (ret) {
849 ehca_err(&shca->ib_device,
850 "Cannot create AQP1 for port 2.");
851 goto probe8;
852 }
853 }
854
855 ret = sysfs_create_group(&dev->dev.kobj, &ehca_dev_attr_grp);
856 if (ret)
857 ehca_err(&shca->ib_device,
858 "Cannot create device attributes ret=%d", ret);
859
860 spin_lock_irqsave(&shca_list_lock, flags);
861 list_add(&shca->shca_list, &shca_list);
862 spin_unlock_irqrestore(&shca_list_lock, flags);
863
864 return 0;
865
866probe8:
867 ret = ehca_destroy_aqp1(&shca->sport[0]);
868 if (ret)
869 ehca_err(&shca->ib_device,
870 "Cannot destroy AQP1 for port 1. ret=%i", ret);
871
872probe7:
873 ib_unregister_device(&shca->ib_device);
874
875probe6:
876 ret = ehca_dereg_internal_maxmr(shca);
877 if (ret)
878 ehca_err(&shca->ib_device,
879 "Cannot destroy internal MR. ret=%x", ret);
880
881probe5:
882 ret = ehca_dealloc_pd(&shca->pd->ib_pd);
883 if (ret)
884 ehca_err(&shca->ib_device,
885 "Cannot destroy internal PD. ret=%x", ret);
886
887probe4:
888 ret = ehca_destroy_eq(shca, &shca->neq);
889 if (ret)
890 ehca_err(&shca->ib_device,
891 "Cannot destroy NEQ. ret=%x", ret);
892
893probe3:
894 ret = ehca_destroy_eq(shca, &shca->eq);
895 if (ret)
896 ehca_err(&shca->ib_device,
897 "Cannot destroy EQ. ret=%x", ret);
898
899probe1:
900 ib_dealloc_device(&shca->ib_device);
901
902 return -EINVAL;
903}
904
905static int ehca_remove(struct platform_device *dev)
906{
907 struct ehca_shca *shca = dev_get_drvdata(&dev->dev);
908 unsigned long flags;
909 int ret;
910
911 sysfs_remove_group(&dev->dev.kobj, &ehca_dev_attr_grp);
912
913 if (ehca_open_aqp1 == 1) {
914 int i;
915 for (i = 0; i < shca->num_ports; i++) {
916 ret = ehca_destroy_aqp1(&shca->sport[i]);
917 if (ret)
918 ehca_err(&shca->ib_device,
919 "Cannot destroy AQP1 for port %x "
920 "ret=%i", ret, i);
921 }
922 }
923
924 ib_unregister_device(&shca->ib_device);
925
926 ret = ehca_dereg_internal_maxmr(shca);
927 if (ret)
928 ehca_err(&shca->ib_device,
929 "Cannot destroy internal MR. ret=%i", ret);
930
931 ret = ehca_dealloc_pd(&shca->pd->ib_pd);
932 if (ret)
933 ehca_err(&shca->ib_device,
934 "Cannot destroy internal PD. ret=%i", ret);
935
936 ret = ehca_destroy_eq(shca, &shca->eq);
937 if (ret)
938 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%i", ret);
939
940 ret = ehca_destroy_eq(shca, &shca->neq);
941 if (ret)
942 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%i", ret);
943
944 ib_dealloc_device(&shca->ib_device);
945
946 spin_lock_irqsave(&shca_list_lock, flags);
947 list_del(&shca->shca_list);
948 spin_unlock_irqrestore(&shca_list_lock, flags);
949
950 return ret;
951}
952
953static struct of_device_id ehca_device_table[] =
954{
955 {
956 .name = "lhca",
957 .compatible = "IBM,lhca",
958 },
959 {},
960};
961MODULE_DEVICE_TABLE(of, ehca_device_table);
962
963static struct platform_driver ehca_driver = {
964 .probe = ehca_probe,
965 .remove = ehca_remove,
966 .driver = {
967 .name = "ehca",
968 .owner = THIS_MODULE,
969 .groups = ehca_drv_attr_groups,
970 .of_match_table = ehca_device_table,
971 },
972};
973
974void ehca_poll_eqs(unsigned long data)
975{
976 struct ehca_shca *shca;
977
978 spin_lock(&shca_list_lock);
979 list_for_each_entry(shca, &shca_list, shca_list) {
980 if (shca->eq.is_initialized) {
981
982 struct ehca_eq *eq = &shca->eq;
983 int max = 3;
984 volatile u64 q_ofs, q_ofs2;
985 unsigned long flags;
986 spin_lock_irqsave(&eq->spinlock, flags);
987 q_ofs = eq->ipz_queue.current_q_offset;
988 spin_unlock_irqrestore(&eq->spinlock, flags);
989 do {
990 spin_lock_irqsave(&eq->spinlock, flags);
991 q_ofs2 = eq->ipz_queue.current_q_offset;
992 spin_unlock_irqrestore(&eq->spinlock, flags);
993 max--;
994 } while (q_ofs == q_ofs2 && max > 0);
995 if (q_ofs == q_ofs2)
996 ehca_process_eq(shca, 0);
997 }
998 }
999 mod_timer(&poll_eqs_timer, round_jiffies(jiffies + HZ));
1000 spin_unlock(&shca_list_lock);
1001}
1002
1003static int ehca_mem_notifier(struct notifier_block *nb,
1004 unsigned long action, void *data)
1005{
1006 static unsigned long ehca_dmem_warn_time;
1007 unsigned long flags;
1008
1009 switch (action) {
1010 case MEM_CANCEL_OFFLINE:
1011 case MEM_CANCEL_ONLINE:
1012 case MEM_ONLINE:
1013 case MEM_OFFLINE:
1014 return NOTIFY_OK;
1015 case MEM_GOING_ONLINE:
1016 case MEM_GOING_OFFLINE:
1017
1018 spin_lock_irqsave(&shca_list_lock, flags);
1019 if (list_empty(&shca_list)) {
1020 spin_unlock_irqrestore(&shca_list_lock, flags);
1021 return NOTIFY_OK;
1022 } else {
1023 spin_unlock_irqrestore(&shca_list_lock, flags);
1024 if (printk_timed_ratelimit(&ehca_dmem_warn_time,
1025 30 * 1000))
1026 ehca_gen_err("DMEM operations are not allowed"
1027 "in conjunction with eHCA");
1028 return NOTIFY_BAD;
1029 }
1030 }
1031 return NOTIFY_OK;
1032}
1033
1034static struct notifier_block ehca_mem_nb = {
1035 .notifier_call = ehca_mem_notifier,
1036};
1037
1038static int __init ehca_module_init(void)
1039{
1040 int ret;
1041
1042 printk(KERN_INFO "eHCA Infiniband Device Driver "
1043 "(Version " HCAD_VERSION ")\n");
1044
1045 ret = ehca_create_comp_pool();
1046 if (ret) {
1047 ehca_gen_err("Cannot create comp pool.");
1048 return ret;
1049 }
1050
1051 ret = ehca_create_slab_caches();
1052 if (ret) {
1053 ehca_gen_err("Cannot create SLAB caches");
1054 ret = -ENOMEM;
1055 goto module_init1;
1056 }
1057
1058 ret = ehca_create_busmap();
1059 if (ret) {
1060 ehca_gen_err("Cannot create busmap.");
1061 goto module_init2;
1062 }
1063
1064 ret = ibmebus_register_driver(&ehca_driver);
1065 if (ret) {
1066 ehca_gen_err("Cannot register eHCA device driver");
1067 ret = -EINVAL;
1068 goto module_init3;
1069 }
1070
1071 ret = register_memory_notifier(&ehca_mem_nb);
1072 if (ret) {
1073 ehca_gen_err("Failed registering memory add/remove notifier");
1074 goto module_init4;
1075 }
1076
1077 if (ehca_poll_all_eqs != 1) {
1078 ehca_gen_err("WARNING!!!");
1079 ehca_gen_err("It is possible to lose interrupts.");
1080 } else {
1081 init_timer(&poll_eqs_timer);
1082 poll_eqs_timer.function = ehca_poll_eqs;
1083 poll_eqs_timer.expires = jiffies + HZ;
1084 add_timer(&poll_eqs_timer);
1085 }
1086
1087 return 0;
1088
1089module_init4:
1090 ibmebus_unregister_driver(&ehca_driver);
1091
1092module_init3:
1093 ehca_destroy_busmap();
1094
1095module_init2:
1096 ehca_destroy_slab_caches();
1097
1098module_init1:
1099 ehca_destroy_comp_pool();
1100 return ret;
1101};
1102
1103static void __exit ehca_module_exit(void)
1104{
1105 if (ehca_poll_all_eqs == 1)
1106 del_timer_sync(&poll_eqs_timer);
1107
1108 ibmebus_unregister_driver(&ehca_driver);
1109
1110 unregister_memory_notifier(&ehca_mem_nb);
1111
1112 ehca_destroy_busmap();
1113
1114 ehca_destroy_slab_caches();
1115
1116 ehca_destroy_comp_pool();
1117
1118 idr_destroy(&ehca_cq_idr);
1119 idr_destroy(&ehca_qp_idr);
1120};
1121
1122module_init(ehca_module_init);
1123module_exit(ehca_module_exit);
1124
