2 * IBM eServer eHCA Infiniband device driver for Linux on POWER
4 * module start stop, hca detection
6 * Authors: Heiko J Schick <schickhj@de.ibm.com>
7 * Hoang-Nam Nguyen <hnguyen@de.ibm.com>
8 * Joachim Fenkes <fenkes@de.ibm.com>
10 * Copyright (c) 2005 IBM Corporation
12 * All rights reserved.
14 * This source code is distributed under a dual license of GPL v2.0 and OpenIB
19 * Redistribution and use in source and binary forms, with or without
20 * modification, are permitted provided that the following conditions are met:
22 * Redistributions of source code must retain the above copyright notice, this
23 * list of conditions and the following disclaimer.
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.
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.
43 #ifdef CONFIG_PPC_64K_PAGES
44 #include <linux/slab.h>
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"
55 #define HCAD_VERSION "0029"
57 MODULE_LICENSE("Dual BSD/GPL");
58 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
59 MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver");
60 MODULE_VERSION(HCAD_VERSION);
62 static int ehca_open_aqp1 = 0;
63 static int ehca_hw_level = 0;
64 static int ehca_poll_all_eqs = 1;
66 int ehca_debug_level = 0;
67 int ehca_nr_ports = -1;
68 int ehca_use_hp_mr = 0;
69 int ehca_port_act_time = 30;
70 int ehca_static_rate = -1;
71 int ehca_scaling_code = 0;
72 int ehca_lock_hcalls = -1;
76 module_param_named(open_aqp1, ehca_open_aqp1, bool, S_IRUGO);
77 module_param_named(debug_level, ehca_debug_level, int, S_IRUGO);
78 module_param_named(hw_level, ehca_hw_level, int, S_IRUGO);
79 module_param_named(nr_ports, ehca_nr_ports, int, S_IRUGO);
80 module_param_named(use_hp_mr, ehca_use_hp_mr, bool, S_IRUGO);
81 module_param_named(port_act_time, ehca_port_act_time, int, S_IRUGO);
82 module_param_named(poll_all_eqs, ehca_poll_all_eqs, bool, S_IRUGO);
83 module_param_named(static_rate, ehca_static_rate, int, S_IRUGO);
84 module_param_named(scaling_code, ehca_scaling_code, bool, S_IRUGO);
85 module_param_named(lock_hcalls, ehca_lock_hcalls, bool, S_IRUGO);
86 module_param_named(number_of_cqs, ehca_max_cq, int, S_IRUGO);
87 module_param_named(number_of_qps, ehca_max_qp, int, S_IRUGO);
89 MODULE_PARM_DESC(open_aqp1,
90 "Open AQP1 on startup (default: no)");
91 MODULE_PARM_DESC(debug_level,
92 "Amount of debug output (0: none (default), 1: traces, "
93 "2: some dumps, 3: lots)");
94 MODULE_PARM_DESC(hw_level,
95 "Hardware level (0: autosensing (default), "
96 "0x10..0x14: eHCA, 0x20..0x23: eHCA2)");
97 MODULE_PARM_DESC(nr_ports,
98 "number of connected ports (-1: autodetect (default), "
99 "1: port one only, 2: two ports)");
100 MODULE_PARM_DESC(use_hp_mr,
101 "Use high performance MRs (default: no)");
102 MODULE_PARM_DESC(port_act_time,
103 "Time to wait for port activation (default: 30 sec)");
104 MODULE_PARM_DESC(poll_all_eqs,
105 "Poll all event queues periodically (default: yes)");
106 MODULE_PARM_DESC(static_rate,
107 "Set permanent static rate (default: no static rate)");
108 MODULE_PARM_DESC(scaling_code,
109 "Enable scaling code (default: no)");
110 MODULE_PARM_DESC(lock_hcalls,
111 "Serialize all hCalls made by the driver "
112 "(default: autodetect)");
113 MODULE_PARM_DESC(number_of_cqs,
114 "Max number of CQs which can be allocated "
115 "(default: autodetect)");
116 MODULE_PARM_DESC(number_of_qps,
117 "Max number of QPs which can be allocated "
118 "(default: autodetect)");
120 DEFINE_RWLOCK(ehca_qp_idr_lock);
121 DEFINE_RWLOCK(ehca_cq_idr_lock);
122 DEFINE_IDR(ehca_qp_idr);
123 DEFINE_IDR(ehca_cq_idr);
125 static LIST_HEAD(shca_list); /* list of all registered ehcas */
126 DEFINE_SPINLOCK(shca_list_lock);
128 static struct timer_list poll_eqs_timer;
130 #ifdef CONFIG_PPC_64K_PAGES
131 static struct kmem_cache *ctblk_cache;
133 void *ehca_alloc_fw_ctrlblock(gfp_t flags)
135 void *ret = kmem_cache_zalloc(ctblk_cache, flags);
137 ehca_gen_err("Out of memory for ctblk");
141 void ehca_free_fw_ctrlblock(void *ptr)
144 kmem_cache_free(ctblk_cache, ptr);
149 int ehca2ib_return_code(u64 ehca_rc)
154 case H_RESOURCE: /* Resource in use */
157 case H_NOT_ENOUGH_RESOURCES: /* insufficient resources */
158 case H_CONSTRAINED: /* resource constraint */
166 static int ehca_create_slab_caches(void)
170 ret = ehca_init_pd_cache();
172 ehca_gen_err("Cannot create PD SLAB cache.");
176 ret = ehca_init_cq_cache();
178 ehca_gen_err("Cannot create CQ SLAB cache.");
179 goto create_slab_caches2;
182 ret = ehca_init_qp_cache();
184 ehca_gen_err("Cannot create QP SLAB cache.");
185 goto create_slab_caches3;
188 ret = ehca_init_av_cache();
190 ehca_gen_err("Cannot create AV SLAB cache.");
191 goto create_slab_caches4;
194 ret = ehca_init_mrmw_cache();
196 ehca_gen_err("Cannot create MR&MW SLAB cache.");
197 goto create_slab_caches5;
200 ret = ehca_init_small_qp_cache();
202 ehca_gen_err("Cannot create small queue SLAB cache.");
203 goto create_slab_caches6;
206 #ifdef CONFIG_PPC_64K_PAGES
207 ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
208 EHCA_PAGESIZE, H_CB_ALIGNMENT,
212 ehca_gen_err("Cannot create ctblk SLAB cache.");
213 ehca_cleanup_small_qp_cache();
214 goto create_slab_caches6;
220 ehca_cleanup_mrmw_cache();
223 ehca_cleanup_av_cache();
226 ehca_cleanup_qp_cache();
229 ehca_cleanup_cq_cache();
232 ehca_cleanup_pd_cache();
237 static void ehca_destroy_slab_caches(void)
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
247 kmem_cache_destroy(ctblk_cache);
251 #define EHCA_HCAAVER EHCA_BMASK_IBM(32, 39)
252 #define EHCA_REVID EHCA_BMASK_IBM(40, 63)
254 static struct cap_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" },
278 static int ehca_sense_attributes(struct ehca_shca *shca)
282 struct hipz_query_hca *rblock;
283 struct hipz_query_port *port;
284 const char *loc_code;
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,
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",
298 ehca_gen_dbg(" ... location lode=%s", loc_code);
300 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
302 ehca_gen_err("Cannot allocate rblock memory.");
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",
311 goto sense_attributes1;
314 if (ehca_nr_ports == 1)
317 shca->num_ports = (u8)rblock->num_ports;
319 ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
321 if (ehca_hw_level == 0) {
325 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
326 revid = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
328 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
332 shca->hw_level = 0x10 | (revid + 1);
334 shca->hw_level = 0x14;
335 } else if (hcaaver == 2) {
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;
344 if (!shca->hw_level) {
345 ehca_gen_warn("unknown hardware version"
346 " - assuming default level");
347 shca->hw_level = 0x22;
350 shca->hw_level = ehca_hw_level;
351 ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
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);
359 /* Autodetect hCall locking -- the "H_ALLOC_RESOURCE synced" flag is
360 * a firmware property, so it's valid across all adapters
362 if (ehca_lock_hcalls == -1)
363 ehca_lock_hcalls = !(shca->hca_cap & HCA_CAP_H_ALLOC_RES_SYNC);
365 /* translate supported MR page sizes; always support 4K */
366 shca->hca_cap_mr_pgsize = EHCA_PAGESIZE;
367 for (i = 0; i < ARRAY_SIZE(pgsize_map); i += 2)
368 if (rblock->memory_page_size_supported & pgsize_map[i])
369 shca->hca_cap_mr_pgsize |= pgsize_map[i + 1];
371 /* Set maximum number of CQs and QPs to calculate EQ size */
372 if (shca->max_num_qps == -1)
373 shca->max_num_qps = min_t(int, rblock->max_qp,
374 EHCA_MAX_NUM_QUEUES);
375 else if (shca->max_num_qps < 1 || shca->max_num_qps > rblock->max_qp) {
376 ehca_gen_warn("The requested number of QPs is out of range "
377 "(1 - %i) specified by HW. Value is set to %i",
378 rblock->max_qp, rblock->max_qp);
379 shca->max_num_qps = rblock->max_qp;
382 if (shca->max_num_cqs == -1)
383 shca->max_num_cqs = min_t(int, rblock->max_cq,
384 EHCA_MAX_NUM_QUEUES);
385 else if (shca->max_num_cqs < 1 || shca->max_num_cqs > rblock->max_cq) {
386 ehca_gen_warn("The requested number of CQs is out of range "
387 "(1 - %i) specified by HW. Value is set to %i",
388 rblock->max_cq, rblock->max_cq);
391 /* query max MTU from first port -- it's the same for all ports */
392 port = (struct hipz_query_port *)rblock;
393 h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
394 if (h_ret != H_SUCCESS) {
395 ehca_gen_err("Cannot query port properties. h_ret=%lli",
398 goto sense_attributes1;
401 shca->max_mtu = port->max_mtu;
404 ehca_free_fw_ctrlblock(rblock);
408 static int init_node_guid(struct ehca_shca *shca)
411 struct hipz_query_hca *rblock;
413 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
415 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
419 if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
420 ehca_err(&shca->ib_device, "Can't query device properties");
422 goto init_node_guid1;
425 memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
428 ehca_free_fw_ctrlblock(rblock);
432 static int ehca_init_device(struct ehca_shca *shca)
436 ret = init_node_guid(shca);
440 strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
441 shca->ib_device.owner = THIS_MODULE;
443 shca->ib_device.uverbs_abi_ver = 8;
444 shca->ib_device.uverbs_cmd_mask =
445 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
446 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
447 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
448 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
449 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
450 (1ull << IB_USER_VERBS_CMD_REG_MR) |
451 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
452 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
453 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
454 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
455 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
456 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
457 (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
458 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
459 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) |
460 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
462 shca->ib_device.node_type = RDMA_NODE_IB_CA;
463 shca->ib_device.phys_port_cnt = shca->num_ports;
464 shca->ib_device.num_comp_vectors = 1;
465 shca->ib_device.dma_device = &shca->ofdev->dev;
466 shca->ib_device.query_device = ehca_query_device;
467 shca->ib_device.query_port = ehca_query_port;
468 shca->ib_device.query_gid = ehca_query_gid;
469 shca->ib_device.query_pkey = ehca_query_pkey;
470 /* shca->in_device.modify_device = ehca_modify_device */
471 shca->ib_device.modify_port = ehca_modify_port;
472 shca->ib_device.alloc_ucontext = ehca_alloc_ucontext;
473 shca->ib_device.dealloc_ucontext = ehca_dealloc_ucontext;
474 shca->ib_device.alloc_pd = ehca_alloc_pd;
475 shca->ib_device.dealloc_pd = ehca_dealloc_pd;
476 shca->ib_device.create_ah = ehca_create_ah;
477 /* shca->ib_device.modify_ah = ehca_modify_ah; */
478 shca->ib_device.query_ah = ehca_query_ah;
479 shca->ib_device.destroy_ah = ehca_destroy_ah;
480 shca->ib_device.create_qp = ehca_create_qp;
481 shca->ib_device.modify_qp = ehca_modify_qp;
482 shca->ib_device.query_qp = ehca_query_qp;
483 shca->ib_device.destroy_qp = ehca_destroy_qp;
484 shca->ib_device.post_send = ehca_post_send;
485 shca->ib_device.post_recv = ehca_post_recv;
486 shca->ib_device.create_cq = ehca_create_cq;
487 shca->ib_device.destroy_cq = ehca_destroy_cq;
488 shca->ib_device.resize_cq = ehca_resize_cq;
489 shca->ib_device.poll_cq = ehca_poll_cq;
490 /* shca->ib_device.peek_cq = ehca_peek_cq; */
491 shca->ib_device.req_notify_cq = ehca_req_notify_cq;
492 /* shca->ib_device.req_ncomp_notif = ehca_req_ncomp_notif; */
493 shca->ib_device.get_dma_mr = ehca_get_dma_mr;
494 shca->ib_device.reg_phys_mr = ehca_reg_phys_mr;
495 shca->ib_device.reg_user_mr = ehca_reg_user_mr;
496 shca->ib_device.query_mr = ehca_query_mr;
497 shca->ib_device.dereg_mr = ehca_dereg_mr;
498 shca->ib_device.rereg_phys_mr = ehca_rereg_phys_mr;
499 shca->ib_device.alloc_mw = ehca_alloc_mw;
500 shca->ib_device.bind_mw = ehca_bind_mw;
501 shca->ib_device.dealloc_mw = ehca_dealloc_mw;
502 shca->ib_device.alloc_fmr = ehca_alloc_fmr;
503 shca->ib_device.map_phys_fmr = ehca_map_phys_fmr;
504 shca->ib_device.unmap_fmr = ehca_unmap_fmr;
505 shca->ib_device.dealloc_fmr = ehca_dealloc_fmr;
506 shca->ib_device.attach_mcast = ehca_attach_mcast;
507 shca->ib_device.detach_mcast = ehca_detach_mcast;
508 shca->ib_device.process_mad = ehca_process_mad;
509 shca->ib_device.mmap = ehca_mmap;
510 shca->ib_device.dma_ops = &ehca_dma_mapping_ops;
512 if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
513 shca->ib_device.uverbs_cmd_mask |=
514 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
515 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
516 (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
517 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
519 shca->ib_device.create_srq = ehca_create_srq;
520 shca->ib_device.modify_srq = ehca_modify_srq;
521 shca->ib_device.query_srq = ehca_query_srq;
522 shca->ib_device.destroy_srq = ehca_destroy_srq;
523 shca->ib_device.post_srq_recv = ehca_post_srq_recv;
529 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
531 struct ehca_sport *sport = &shca->sport[port - 1];
534 struct ib_qp_init_attr qp_init_attr;
537 if (sport->ibcq_aqp1) {
538 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
542 ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void *)(-1), 10, 0);
544 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
545 return PTR_ERR(ibcq);
547 sport->ibcq_aqp1 = ibcq;
549 if (sport->ibqp_sqp[IB_QPT_GSI]) {
550 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
555 memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
556 qp_init_attr.send_cq = ibcq;
557 qp_init_attr.recv_cq = ibcq;
558 qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
559 qp_init_attr.cap.max_send_wr = 100;
560 qp_init_attr.cap.max_recv_wr = 100;
561 qp_init_attr.cap.max_send_sge = 2;
562 qp_init_attr.cap.max_recv_sge = 1;
563 qp_init_attr.qp_type = IB_QPT_GSI;
564 qp_init_attr.port_num = port;
565 qp_init_attr.qp_context = NULL;
566 qp_init_attr.event_handler = NULL;
567 qp_init_attr.srq = NULL;
569 ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
571 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
575 sport->ibqp_sqp[IB_QPT_GSI] = ibqp;
580 ib_destroy_cq(sport->ibcq_aqp1);
584 static int ehca_destroy_aqp1(struct ehca_sport *sport)
588 ret = ib_destroy_qp(sport->ibqp_sqp[IB_QPT_GSI]);
590 ehca_gen_err("Cannot destroy AQP1 QP. ret=%i", ret);
594 ret = ib_destroy_cq(sport->ibcq_aqp1);
596 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%i", ret);
601 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
603 return snprintf(buf, PAGE_SIZE, "%d\n", ehca_debug_level);
606 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
607 const char *buf, size_t count)
609 int value = (*buf) - '0';
610 if (value >= 0 && value <= 9)
611 ehca_debug_level = value;
615 static DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
616 ehca_show_debug_level, ehca_store_debug_level);
618 static struct attribute *ehca_drv_attrs[] = {
619 &driver_attr_debug_level.attr,
623 static struct attribute_group ehca_drv_attr_grp = {
624 .attrs = ehca_drv_attrs
627 static const struct attribute_group *ehca_drv_attr_groups[] = {
632 #define EHCA_RESOURCE_ATTR(name) \
633 static ssize_t ehca_show_##name(struct device *dev, \
634 struct device_attribute *attr, \
637 struct ehca_shca *shca; \
638 struct hipz_query_hca *rblock; \
641 shca = dev_get_drvdata(dev); \
643 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL); \
645 dev_err(dev, "Can't allocate rblock memory.\n"); \
649 if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
650 dev_err(dev, "Can't query device properties\n"); \
651 ehca_free_fw_ctrlblock(rblock); \
655 data = rblock->name; \
656 ehca_free_fw_ctrlblock(rblock); \
658 if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1)) \
659 return snprintf(buf, 256, "1\n"); \
661 return snprintf(buf, 256, "%d\n", data); \
664 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
666 EHCA_RESOURCE_ATTR(num_ports);
667 EHCA_RESOURCE_ATTR(hw_ver);
668 EHCA_RESOURCE_ATTR(max_eq);
669 EHCA_RESOURCE_ATTR(cur_eq);
670 EHCA_RESOURCE_ATTR(max_cq);
671 EHCA_RESOURCE_ATTR(cur_cq);
672 EHCA_RESOURCE_ATTR(max_qp);
673 EHCA_RESOURCE_ATTR(cur_qp);
674 EHCA_RESOURCE_ATTR(max_mr);
675 EHCA_RESOURCE_ATTR(cur_mr);
676 EHCA_RESOURCE_ATTR(max_mw);
677 EHCA_RESOURCE_ATTR(cur_mw);
678 EHCA_RESOURCE_ATTR(max_pd);
679 EHCA_RESOURCE_ATTR(max_ah);
681 static ssize_t ehca_show_adapter_handle(struct device *dev,
682 struct device_attribute *attr,
685 struct ehca_shca *shca = dev_get_drvdata(dev);
687 return sprintf(buf, "%llx\n", shca->ipz_hca_handle.handle);
690 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
692 static struct attribute *ehca_dev_attrs[] = {
693 &dev_attr_adapter_handle.attr,
694 &dev_attr_num_ports.attr,
695 &dev_attr_hw_ver.attr,
696 &dev_attr_max_eq.attr,
697 &dev_attr_cur_eq.attr,
698 &dev_attr_max_cq.attr,
699 &dev_attr_cur_cq.attr,
700 &dev_attr_max_qp.attr,
701 &dev_attr_cur_qp.attr,
702 &dev_attr_max_mr.attr,
703 &dev_attr_cur_mr.attr,
704 &dev_attr_max_mw.attr,
705 &dev_attr_cur_mw.attr,
706 &dev_attr_max_pd.attr,
707 &dev_attr_max_ah.attr,
711 static struct attribute_group ehca_dev_attr_grp = {
712 .attrs = ehca_dev_attrs
715 static int __devinit ehca_probe(struct of_device *dev,
716 const struct of_device_id *id)
718 struct ehca_shca *shca;
724 handle = of_get_property(dev->dev.of_node, "ibm,hca-handle", NULL);
726 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
727 dev->dev.of_node->full_name);
732 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
733 dev->dev.of_node->full_name);
737 shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
739 ehca_gen_err("Cannot allocate shca memory.");
743 mutex_init(&shca->modify_mutex);
744 atomic_set(&shca->num_cqs, 0);
745 atomic_set(&shca->num_qps, 0);
746 shca->max_num_qps = ehca_max_qp;
747 shca->max_num_cqs = ehca_max_cq;
749 for (i = 0; i < ARRAY_SIZE(shca->sport); i++)
750 spin_lock_init(&shca->sport[i].mod_sqp_lock);
753 shca->ipz_hca_handle.handle = *handle;
754 dev_set_drvdata(&dev->dev, shca);
756 ret = ehca_sense_attributes(shca);
758 ehca_gen_err("Cannot sense eHCA attributes.");
762 ret = ehca_init_device(shca);
764 ehca_gen_err("Cannot init ehca device struct");
768 eq_size = 2 * shca->max_num_cqs + 4 * shca->max_num_qps;
769 /* create event queues */
770 ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, eq_size);
772 ehca_err(&shca->ib_device, "Cannot create EQ.");
776 ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
778 ehca_err(&shca->ib_device, "Cannot create NEQ.");
782 /* create internal protection domain */
783 ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL);
785 ehca_err(&shca->ib_device, "Cannot create internal PD.");
790 shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
791 shca->pd->ib_pd.device = &shca->ib_device;
793 /* create internal max MR */
794 ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
797 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%i",
802 ret = ib_register_device(&shca->ib_device, NULL);
804 ehca_err(&shca->ib_device,
805 "ib_register_device() failed ret=%i", ret);
809 /* create AQP1 for port 1 */
810 if (ehca_open_aqp1 == 1) {
811 shca->sport[0].port_state = IB_PORT_DOWN;
812 ret = ehca_create_aqp1(shca, 1);
814 ehca_err(&shca->ib_device,
815 "Cannot create AQP1 for port 1.");
820 /* create AQP1 for port 2 */
821 if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
822 shca->sport[1].port_state = IB_PORT_DOWN;
823 ret = ehca_create_aqp1(shca, 2);
825 ehca_err(&shca->ib_device,
826 "Cannot create AQP1 for port 2.");
831 ret = sysfs_create_group(&dev->dev.kobj, &ehca_dev_attr_grp);
832 if (ret) /* only complain; we can live without attributes */
833 ehca_err(&shca->ib_device,
834 "Cannot create device attributes ret=%d", ret);
836 spin_lock_irqsave(&shca_list_lock, flags);
837 list_add(&shca->shca_list, &shca_list);
838 spin_unlock_irqrestore(&shca_list_lock, flags);
843 ret = ehca_destroy_aqp1(&shca->sport[0]);
845 ehca_err(&shca->ib_device,
846 "Cannot destroy AQP1 for port 1. ret=%i", ret);
849 ib_unregister_device(&shca->ib_device);
852 ret = ehca_dereg_internal_maxmr(shca);
854 ehca_err(&shca->ib_device,
855 "Cannot destroy internal MR. ret=%x", ret);
858 ret = ehca_dealloc_pd(&shca->pd->ib_pd);
860 ehca_err(&shca->ib_device,
861 "Cannot destroy internal PD. ret=%x", ret);
864 ret = ehca_destroy_eq(shca, &shca->neq);
866 ehca_err(&shca->ib_device,
867 "Cannot destroy NEQ. ret=%x", ret);
870 ret = ehca_destroy_eq(shca, &shca->eq);
872 ehca_err(&shca->ib_device,
873 "Cannot destroy EQ. ret=%x", ret);
876 ib_dealloc_device(&shca->ib_device);
881 static int __devexit ehca_remove(struct of_device *dev)
883 struct ehca_shca *shca = dev_get_drvdata(&dev->dev);
887 sysfs_remove_group(&dev->dev.kobj, &ehca_dev_attr_grp);
889 if (ehca_open_aqp1 == 1) {
891 for (i = 0; i < shca->num_ports; i++) {
892 ret = ehca_destroy_aqp1(&shca->sport[i]);
894 ehca_err(&shca->ib_device,
895 "Cannot destroy AQP1 for port %x "
900 ib_unregister_device(&shca->ib_device);
902 ret = ehca_dereg_internal_maxmr(shca);
904 ehca_err(&shca->ib_device,
905 "Cannot destroy internal MR. ret=%i", ret);
907 ret = ehca_dealloc_pd(&shca->pd->ib_pd);
909 ehca_err(&shca->ib_device,
910 "Cannot destroy internal PD. ret=%i", ret);
912 ret = ehca_destroy_eq(shca, &shca->eq);
914 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%i", ret);
916 ret = ehca_destroy_eq(shca, &shca->neq);
918 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%i", ret);
920 ib_dealloc_device(&shca->ib_device);
922 spin_lock_irqsave(&shca_list_lock, flags);
923 list_del(&shca->shca_list);
924 spin_unlock_irqrestore(&shca_list_lock, flags);
929 static struct of_device_id ehca_device_table[] =
933 .compatible = "IBM,lhca",
937 MODULE_DEVICE_TABLE(of, ehca_device_table);
939 static struct of_platform_driver ehca_driver = {
941 .remove = ehca_remove,
944 .owner = THIS_MODULE,
945 .groups = ehca_drv_attr_groups,
946 .of_match_table = ehca_device_table,
950 void ehca_poll_eqs(unsigned long data)
952 struct ehca_shca *shca;
954 spin_lock(&shca_list_lock);
955 list_for_each_entry(shca, &shca_list, shca_list) {
956 if (shca->eq.is_initialized) {
957 /* call deadman proc only if eq ptr does not change */
958 struct ehca_eq *eq = &shca->eq;
960 volatile u64 q_ofs, q_ofs2;
962 spin_lock_irqsave(&eq->spinlock, flags);
963 q_ofs = eq->ipz_queue.current_q_offset;
964 spin_unlock_irqrestore(&eq->spinlock, flags);
966 spin_lock_irqsave(&eq->spinlock, flags);
967 q_ofs2 = eq->ipz_queue.current_q_offset;
968 spin_unlock_irqrestore(&eq->spinlock, flags);
970 } while (q_ofs == q_ofs2 && max > 0);
972 ehca_process_eq(shca, 0);
975 mod_timer(&poll_eqs_timer, round_jiffies(jiffies + HZ));
976 spin_unlock(&shca_list_lock);
979 static int ehca_mem_notifier(struct notifier_block *nb,
980 unsigned long action, void *data)
982 static unsigned long ehca_dmem_warn_time;
986 case MEM_CANCEL_OFFLINE:
987 case MEM_CANCEL_ONLINE:
991 case MEM_GOING_ONLINE:
992 case MEM_GOING_OFFLINE:
993 /* only ok if no hca is attached to the lpar */
994 spin_lock_irqsave(&shca_list_lock, flags);
995 if (list_empty(&shca_list)) {
996 spin_unlock_irqrestore(&shca_list_lock, flags);
999 spin_unlock_irqrestore(&shca_list_lock, flags);
1000 if (printk_timed_ratelimit(&ehca_dmem_warn_time,
1002 ehca_gen_err("DMEM operations are not allowed"
1003 "in conjunction with eHCA");
1010 static struct notifier_block ehca_mem_nb = {
1011 .notifier_call = ehca_mem_notifier,
1014 static int __init ehca_module_init(void)
1018 printk(KERN_INFO "eHCA Infiniband Device Driver "
1019 "(Version " HCAD_VERSION ")\n");
1021 ret = ehca_create_comp_pool();
1023 ehca_gen_err("Cannot create comp pool.");
1027 ret = ehca_create_slab_caches();
1029 ehca_gen_err("Cannot create SLAB caches");
1034 ret = ehca_create_busmap();
1036 ehca_gen_err("Cannot create busmap.");
1040 ret = ibmebus_register_driver(&ehca_driver);
1042 ehca_gen_err("Cannot register eHCA device driver");
1047 ret = register_memory_notifier(&ehca_mem_nb);
1049 ehca_gen_err("Failed registering memory add/remove notifier");
1053 if (ehca_poll_all_eqs != 1) {
1054 ehca_gen_err("WARNING!!!");
1055 ehca_gen_err("It is possible to lose interrupts.");
1057 init_timer(&poll_eqs_timer);
1058 poll_eqs_timer.function = ehca_poll_eqs;
1059 poll_eqs_timer.expires = jiffies + HZ;
1060 add_timer(&poll_eqs_timer);
1066 ibmebus_unregister_driver(&ehca_driver);
1069 ehca_destroy_busmap();
1072 ehca_destroy_slab_caches();
1075 ehca_destroy_comp_pool();
1079 static void __exit ehca_module_exit(void)
1081 if (ehca_poll_all_eqs == 1)
1082 del_timer_sync(&poll_eqs_timer);
1084 ibmebus_unregister_driver(&ehca_driver);
1086 unregister_memory_notifier(&ehca_mem_nb);
1088 ehca_destroy_busmap();
1090 ehca_destroy_slab_caches();
1092 ehca_destroy_comp_pool();
1094 idr_destroy(&ehca_cq_idr);
1095 idr_destroy(&ehca_qp_idr);
1098 module_init(ehca_module_init);
1099 module_exit(ehca_module_exit);