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 bool ehca_open_aqp1 = 0;
63 static int ehca_hw_level = 0;
64 static bool ehca_poll_all_eqs = 1;
66 int ehca_debug_level = 0;
67 int ehca_nr_ports = -1;
68 bool ehca_use_hp_mr = 0;
69 int ehca_port_act_time = 30;
70 int ehca_static_rate = -1;
71 bool ehca_scaling_code = 0;
72 int ehca_lock_hcalls = -1;
76 module_param_named(open_aqp1, ehca_open_aqp1, bool, S_IRUGO);
77 module_param_named(debug_level, ehca_debug_level, int, S_IRUGO);
78 module_param_named(hw_level, ehca_hw_level, int, S_IRUGO);
79 module_param_named(nr_ports, ehca_nr_ports, int, S_IRUGO);
80 module_param_named(use_hp_mr, ehca_use_hp_mr, bool, S_IRUGO);
81 module_param_named(port_act_time, ehca_port_act_time, int, S_IRUGO);
82 module_param_named(poll_all_eqs, ehca_poll_all_eqs, bool, S_IRUGO);
83 module_param_named(static_rate, ehca_static_rate, int, S_IRUGO);
84 module_param_named(scaling_code, ehca_scaling_code, bool, S_IRUGO);
85 module_param_named(lock_hcalls, ehca_lock_hcalls, bint, S_IRUGO);
86 module_param_named(number_of_cqs, ehca_max_cq, int, S_IRUGO);
87 module_param_named(number_of_qps, ehca_max_qp, int, S_IRUGO);
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();
215 goto create_slab_caches6;
221 ehca_cleanup_mrmw_cache();
224 ehca_cleanup_av_cache();
227 ehca_cleanup_qp_cache();
230 ehca_cleanup_cq_cache();
233 ehca_cleanup_pd_cache();
238 static void ehca_destroy_slab_caches(void)
240 ehca_cleanup_small_qp_cache();
241 ehca_cleanup_mrmw_cache();
242 ehca_cleanup_av_cache();
243 ehca_cleanup_qp_cache();
244 ehca_cleanup_cq_cache();
245 ehca_cleanup_pd_cache();
246 #ifdef CONFIG_PPC_64K_PAGES
248 kmem_cache_destroy(ctblk_cache);
252 #define EHCA_HCAAVER EHCA_BMASK_IBM(32, 39)
253 #define EHCA_REVID EHCA_BMASK_IBM(40, 63)
255 static struct cap_descr {
258 } hca_cap_descr[] = {
259 { HCA_CAP_AH_PORT_NR_CHECK, "HCA_CAP_AH_PORT_NR_CHECK" },
260 { HCA_CAP_ATOMIC, "HCA_CAP_ATOMIC" },
261 { HCA_CAP_AUTO_PATH_MIG, "HCA_CAP_AUTO_PATH_MIG" },
262 { HCA_CAP_BAD_P_KEY_CTR, "HCA_CAP_BAD_P_KEY_CTR" },
263 { HCA_CAP_SQD_RTS_PORT_CHANGE, "HCA_CAP_SQD_RTS_PORT_CHANGE" },
264 { HCA_CAP_CUR_QP_STATE_MOD, "HCA_CAP_CUR_QP_STATE_MOD" },
265 { HCA_CAP_INIT_TYPE, "HCA_CAP_INIT_TYPE" },
266 { HCA_CAP_PORT_ACTIVE_EVENT, "HCA_CAP_PORT_ACTIVE_EVENT" },
267 { HCA_CAP_Q_KEY_VIOL_CTR, "HCA_CAP_Q_KEY_VIOL_CTR" },
268 { HCA_CAP_WQE_RESIZE, "HCA_CAP_WQE_RESIZE" },
269 { HCA_CAP_RAW_PACKET_MCAST, "HCA_CAP_RAW_PACKET_MCAST" },
270 { HCA_CAP_SHUTDOWN_PORT, "HCA_CAP_SHUTDOWN_PORT" },
271 { HCA_CAP_RC_LL_QP, "HCA_CAP_RC_LL_QP" },
272 { HCA_CAP_SRQ, "HCA_CAP_SRQ" },
273 { HCA_CAP_UD_LL_QP, "HCA_CAP_UD_LL_QP" },
274 { HCA_CAP_RESIZE_MR, "HCA_CAP_RESIZE_MR" },
275 { HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" },
276 { HCA_CAP_H_ALLOC_RES_SYNC, "HCA_CAP_H_ALLOC_RES_SYNC" },
279 static int ehca_sense_attributes(struct ehca_shca *shca)
283 struct hipz_query_hca *rblock;
284 struct hipz_query_port *port;
285 const char *loc_code;
287 static const u32 pgsize_map[] = {
288 HCA_CAP_MR_PGSIZE_4K, 0x1000,
289 HCA_CAP_MR_PGSIZE_64K, 0x10000,
290 HCA_CAP_MR_PGSIZE_1M, 0x100000,
291 HCA_CAP_MR_PGSIZE_16M, 0x1000000,
294 ehca_gen_dbg("Probing adapter %s...",
295 shca->ofdev->dev.of_node->full_name);
296 loc_code = of_get_property(shca->ofdev->dev.of_node, "ibm,loc-code",
299 ehca_gen_dbg(" ... location lode=%s", loc_code);
301 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
303 ehca_gen_err("Cannot allocate rblock memory.");
307 h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
308 if (h_ret != H_SUCCESS) {
309 ehca_gen_err("Cannot query device properties. h_ret=%lli",
312 goto sense_attributes1;
315 if (ehca_nr_ports == 1)
318 shca->num_ports = (u8)rblock->num_ports;
320 ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
322 if (ehca_hw_level == 0) {
326 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
327 revid = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
329 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
333 shca->hw_level = 0x10 | (revid + 1);
335 shca->hw_level = 0x14;
336 } else if (hcaaver == 2) {
338 shca->hw_level = 0x21;
339 else if (revid == 0x10)
340 shca->hw_level = 0x22;
341 else if (revid == 0x20 || revid == 0x21)
342 shca->hw_level = 0x23;
345 if (!shca->hw_level) {
346 ehca_gen_warn("unknown hardware version"
347 " - assuming default level");
348 shca->hw_level = 0x22;
351 shca->hw_level = ehca_hw_level;
352 ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
354 shca->hca_cap = rblock->hca_cap_indicators;
355 ehca_gen_dbg(" ... HCA capabilities:");
356 for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
357 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
358 ehca_gen_dbg(" %s", hca_cap_descr[i].descr);
360 /* Autodetect hCall locking -- the "H_ALLOC_RESOURCE synced" flag is
361 * a firmware property, so it's valid across all adapters
363 if (ehca_lock_hcalls == -1)
364 ehca_lock_hcalls = !EHCA_BMASK_GET(HCA_CAP_H_ALLOC_RES_SYNC,
367 /* translate supported MR page sizes; always support 4K */
368 shca->hca_cap_mr_pgsize = EHCA_PAGESIZE;
369 for (i = 0; i < ARRAY_SIZE(pgsize_map); i += 2)
370 if (rblock->memory_page_size_supported & pgsize_map[i])
371 shca->hca_cap_mr_pgsize |= pgsize_map[i + 1];
373 /* Set maximum number of CQs and QPs to calculate EQ size */
374 if (shca->max_num_qps == -1)
375 shca->max_num_qps = min_t(int, rblock->max_qp,
376 EHCA_MAX_NUM_QUEUES);
377 else if (shca->max_num_qps < 1 || shca->max_num_qps > rblock->max_qp) {
378 ehca_gen_warn("The requested number of QPs is out of range "
379 "(1 - %i) specified by HW. Value is set to %i",
380 rblock->max_qp, rblock->max_qp);
381 shca->max_num_qps = rblock->max_qp;
384 if (shca->max_num_cqs == -1)
385 shca->max_num_cqs = min_t(int, rblock->max_cq,
386 EHCA_MAX_NUM_QUEUES);
387 else if (shca->max_num_cqs < 1 || shca->max_num_cqs > rblock->max_cq) {
388 ehca_gen_warn("The requested number of CQs is out of range "
389 "(1 - %i) specified by HW. Value is set to %i",
390 rblock->max_cq, rblock->max_cq);
393 /* query max MTU from first port -- it's the same for all ports */
394 port = (struct hipz_query_port *)rblock;
395 h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
396 if (h_ret != H_SUCCESS) {
397 ehca_gen_err("Cannot query port properties. h_ret=%lli",
400 goto sense_attributes1;
403 shca->max_mtu = port->max_mtu;
406 ehca_free_fw_ctrlblock(rblock);
410 static int init_node_guid(struct ehca_shca *shca)
413 struct hipz_query_hca *rblock;
415 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
417 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
421 if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
422 ehca_err(&shca->ib_device, "Can't query device properties");
424 goto init_node_guid1;
427 memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
430 ehca_free_fw_ctrlblock(rblock);
434 static int ehca_port_immutable(struct ib_device *ibdev, u8 port_num,
435 struct ib_port_immutable *immutable)
437 struct ib_port_attr attr;
440 err = ehca_query_port(ibdev, port_num, &attr);
444 immutable->pkey_tbl_len = attr.pkey_tbl_len;
445 immutable->gid_tbl_len = attr.gid_tbl_len;
446 immutable->core_cap_flags = RDMA_CORE_PORT_IBA_IB;
451 static int ehca_init_device(struct ehca_shca *shca)
455 ret = init_node_guid(shca);
459 strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
460 shca->ib_device.owner = THIS_MODULE;
462 shca->ib_device.uverbs_abi_ver = 8;
463 shca->ib_device.uverbs_cmd_mask =
464 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
465 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
466 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
467 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
468 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
469 (1ull << IB_USER_VERBS_CMD_REG_MR) |
470 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
471 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
472 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
473 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
474 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
475 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
476 (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
477 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
478 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) |
479 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
481 shca->ib_device.node_type = RDMA_NODE_IB_CA;
482 shca->ib_device.phys_port_cnt = shca->num_ports;
483 shca->ib_device.num_comp_vectors = 1;
484 shca->ib_device.dma_device = &shca->ofdev->dev;
485 shca->ib_device.query_device = ehca_query_device;
486 shca->ib_device.query_port = ehca_query_port;
487 shca->ib_device.query_gid = ehca_query_gid;
488 shca->ib_device.query_pkey = ehca_query_pkey;
489 /* shca->in_device.modify_device = ehca_modify_device */
490 shca->ib_device.modify_port = ehca_modify_port;
491 shca->ib_device.alloc_ucontext = ehca_alloc_ucontext;
492 shca->ib_device.dealloc_ucontext = ehca_dealloc_ucontext;
493 shca->ib_device.alloc_pd = ehca_alloc_pd;
494 shca->ib_device.dealloc_pd = ehca_dealloc_pd;
495 shca->ib_device.create_ah = ehca_create_ah;
496 /* shca->ib_device.modify_ah = ehca_modify_ah; */
497 shca->ib_device.query_ah = ehca_query_ah;
498 shca->ib_device.destroy_ah = ehca_destroy_ah;
499 shca->ib_device.create_qp = ehca_create_qp;
500 shca->ib_device.modify_qp = ehca_modify_qp;
501 shca->ib_device.query_qp = ehca_query_qp;
502 shca->ib_device.destroy_qp = ehca_destroy_qp;
503 shca->ib_device.post_send = ehca_post_send;
504 shca->ib_device.post_recv = ehca_post_recv;
505 shca->ib_device.create_cq = ehca_create_cq;
506 shca->ib_device.destroy_cq = ehca_destroy_cq;
507 shca->ib_device.resize_cq = ehca_resize_cq;
508 shca->ib_device.poll_cq = ehca_poll_cq;
509 /* shca->ib_device.peek_cq = ehca_peek_cq; */
510 shca->ib_device.req_notify_cq = ehca_req_notify_cq;
511 /* shca->ib_device.req_ncomp_notif = ehca_req_ncomp_notif; */
512 shca->ib_device.get_dma_mr = ehca_get_dma_mr;
513 shca->ib_device.reg_phys_mr = ehca_reg_phys_mr;
514 shca->ib_device.reg_user_mr = ehca_reg_user_mr;
515 shca->ib_device.query_mr = ehca_query_mr;
516 shca->ib_device.dereg_mr = ehca_dereg_mr;
517 shca->ib_device.rereg_phys_mr = ehca_rereg_phys_mr;
518 shca->ib_device.alloc_mw = ehca_alloc_mw;
519 shca->ib_device.bind_mw = ehca_bind_mw;
520 shca->ib_device.dealloc_mw = ehca_dealloc_mw;
521 shca->ib_device.alloc_fmr = ehca_alloc_fmr;
522 shca->ib_device.map_phys_fmr = ehca_map_phys_fmr;
523 shca->ib_device.unmap_fmr = ehca_unmap_fmr;
524 shca->ib_device.dealloc_fmr = ehca_dealloc_fmr;
525 shca->ib_device.attach_mcast = ehca_attach_mcast;
526 shca->ib_device.detach_mcast = ehca_detach_mcast;
527 shca->ib_device.process_mad = ehca_process_mad;
528 shca->ib_device.mmap = ehca_mmap;
529 shca->ib_device.dma_ops = &ehca_dma_mapping_ops;
530 shca->ib_device.get_port_immutable = ehca_port_immutable;
532 if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
533 shca->ib_device.uverbs_cmd_mask |=
534 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
535 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
536 (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
537 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
539 shca->ib_device.create_srq = ehca_create_srq;
540 shca->ib_device.modify_srq = ehca_modify_srq;
541 shca->ib_device.query_srq = ehca_query_srq;
542 shca->ib_device.destroy_srq = ehca_destroy_srq;
543 shca->ib_device.post_srq_recv = ehca_post_srq_recv;
549 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
551 struct ehca_sport *sport = &shca->sport[port - 1];
554 struct ib_qp_init_attr qp_init_attr;
557 if (sport->ibcq_aqp1) {
558 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
562 ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void *)(-1), 10, 0);
564 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
565 return PTR_ERR(ibcq);
567 sport->ibcq_aqp1 = ibcq;
569 if (sport->ibqp_sqp[IB_QPT_GSI]) {
570 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
575 memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
576 qp_init_attr.send_cq = ibcq;
577 qp_init_attr.recv_cq = ibcq;
578 qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
579 qp_init_attr.cap.max_send_wr = 100;
580 qp_init_attr.cap.max_recv_wr = 100;
581 qp_init_attr.cap.max_send_sge = 2;
582 qp_init_attr.cap.max_recv_sge = 1;
583 qp_init_attr.qp_type = IB_QPT_GSI;
584 qp_init_attr.port_num = port;
585 qp_init_attr.qp_context = NULL;
586 qp_init_attr.event_handler = NULL;
587 qp_init_attr.srq = NULL;
589 ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
591 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
595 sport->ibqp_sqp[IB_QPT_GSI] = ibqp;
600 ib_destroy_cq(sport->ibcq_aqp1);
604 static int ehca_destroy_aqp1(struct ehca_sport *sport)
608 ret = ib_destroy_qp(sport->ibqp_sqp[IB_QPT_GSI]);
610 ehca_gen_err("Cannot destroy AQP1 QP. ret=%i", ret);
614 ret = ib_destroy_cq(sport->ibcq_aqp1);
616 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%i", ret);
621 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
623 return snprintf(buf, PAGE_SIZE, "%d\n", ehca_debug_level);
626 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
627 const char *buf, size_t count)
629 int value = (*buf) - '0';
630 if (value >= 0 && value <= 9)
631 ehca_debug_level = value;
635 static DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
636 ehca_show_debug_level, ehca_store_debug_level);
638 static struct attribute *ehca_drv_attrs[] = {
639 &driver_attr_debug_level.attr,
643 static struct attribute_group ehca_drv_attr_grp = {
644 .attrs = ehca_drv_attrs
647 static const struct attribute_group *ehca_drv_attr_groups[] = {
652 #define EHCA_RESOURCE_ATTR(name) \
653 static ssize_t ehca_show_##name(struct device *dev, \
654 struct device_attribute *attr, \
657 struct ehca_shca *shca; \
658 struct hipz_query_hca *rblock; \
661 shca = dev_get_drvdata(dev); \
663 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL); \
665 dev_err(dev, "Can't allocate rblock memory.\n"); \
669 if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
670 dev_err(dev, "Can't query device properties\n"); \
671 ehca_free_fw_ctrlblock(rblock); \
675 data = rblock->name; \
676 ehca_free_fw_ctrlblock(rblock); \
678 if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1)) \
679 return snprintf(buf, 256, "1\n"); \
681 return snprintf(buf, 256, "%d\n", data); \
684 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
686 EHCA_RESOURCE_ATTR(num_ports);
687 EHCA_RESOURCE_ATTR(hw_ver);
688 EHCA_RESOURCE_ATTR(max_eq);
689 EHCA_RESOURCE_ATTR(cur_eq);
690 EHCA_RESOURCE_ATTR(max_cq);
691 EHCA_RESOURCE_ATTR(cur_cq);
692 EHCA_RESOURCE_ATTR(max_qp);
693 EHCA_RESOURCE_ATTR(cur_qp);
694 EHCA_RESOURCE_ATTR(max_mr);
695 EHCA_RESOURCE_ATTR(cur_mr);
696 EHCA_RESOURCE_ATTR(max_mw);
697 EHCA_RESOURCE_ATTR(cur_mw);
698 EHCA_RESOURCE_ATTR(max_pd);
699 EHCA_RESOURCE_ATTR(max_ah);
701 static ssize_t ehca_show_adapter_handle(struct device *dev,
702 struct device_attribute *attr,
705 struct ehca_shca *shca = dev_get_drvdata(dev);
707 return sprintf(buf, "%llx\n", shca->ipz_hca_handle.handle);
710 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
712 static struct attribute *ehca_dev_attrs[] = {
713 &dev_attr_adapter_handle.attr,
714 &dev_attr_num_ports.attr,
715 &dev_attr_hw_ver.attr,
716 &dev_attr_max_eq.attr,
717 &dev_attr_cur_eq.attr,
718 &dev_attr_max_cq.attr,
719 &dev_attr_cur_cq.attr,
720 &dev_attr_max_qp.attr,
721 &dev_attr_cur_qp.attr,
722 &dev_attr_max_mr.attr,
723 &dev_attr_cur_mr.attr,
724 &dev_attr_max_mw.attr,
725 &dev_attr_cur_mw.attr,
726 &dev_attr_max_pd.attr,
727 &dev_attr_max_ah.attr,
731 static struct attribute_group ehca_dev_attr_grp = {
732 .attrs = ehca_dev_attrs
735 static int ehca_probe(struct platform_device *dev)
737 struct ehca_shca *shca;
743 handle = of_get_property(dev->dev.of_node, "ibm,hca-handle", NULL);
745 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
746 dev->dev.of_node->full_name);
751 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
752 dev->dev.of_node->full_name);
756 shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
758 ehca_gen_err("Cannot allocate shca memory.");
762 mutex_init(&shca->modify_mutex);
763 atomic_set(&shca->num_cqs, 0);
764 atomic_set(&shca->num_qps, 0);
765 shca->max_num_qps = ehca_max_qp;
766 shca->max_num_cqs = ehca_max_cq;
768 for (i = 0; i < ARRAY_SIZE(shca->sport); i++)
769 spin_lock_init(&shca->sport[i].mod_sqp_lock);
772 shca->ipz_hca_handle.handle = *handle;
773 dev_set_drvdata(&dev->dev, shca);
775 ret = ehca_sense_attributes(shca);
777 ehca_gen_err("Cannot sense eHCA attributes.");
781 ret = ehca_init_device(shca);
783 ehca_gen_err("Cannot init ehca device struct");
787 eq_size = 2 * shca->max_num_cqs + 4 * shca->max_num_qps;
788 /* create event queues */
789 ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, eq_size);
791 ehca_err(&shca->ib_device, "Cannot create EQ.");
795 ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
797 ehca_err(&shca->ib_device, "Cannot create NEQ.");
801 /* create internal protection domain */
802 ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL);
804 ehca_err(&shca->ib_device, "Cannot create internal PD.");
809 shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
810 shca->pd->ib_pd.device = &shca->ib_device;
812 /* create internal max MR */
813 ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
816 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%i",
821 ret = ib_register_device(&shca->ib_device, NULL);
823 ehca_err(&shca->ib_device,
824 "ib_register_device() failed ret=%i", ret);
828 /* create AQP1 for port 1 */
829 if (ehca_open_aqp1 == 1) {
830 shca->sport[0].port_state = IB_PORT_DOWN;
831 ret = ehca_create_aqp1(shca, 1);
833 ehca_err(&shca->ib_device,
834 "Cannot create AQP1 for port 1.");
839 /* create AQP1 for port 2 */
840 if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
841 shca->sport[1].port_state = IB_PORT_DOWN;
842 ret = ehca_create_aqp1(shca, 2);
844 ehca_err(&shca->ib_device,
845 "Cannot create AQP1 for port 2.");
850 ret = sysfs_create_group(&dev->dev.kobj, &ehca_dev_attr_grp);
851 if (ret) /* only complain; we can live without attributes */
852 ehca_err(&shca->ib_device,
853 "Cannot create device attributes ret=%d", ret);
855 spin_lock_irqsave(&shca_list_lock, flags);
856 list_add(&shca->shca_list, &shca_list);
857 spin_unlock_irqrestore(&shca_list_lock, flags);
862 ret = ehca_destroy_aqp1(&shca->sport[0]);
864 ehca_err(&shca->ib_device,
865 "Cannot destroy AQP1 for port 1. ret=%i", ret);
868 ib_unregister_device(&shca->ib_device);
871 ret = ehca_dereg_internal_maxmr(shca);
873 ehca_err(&shca->ib_device,
874 "Cannot destroy internal MR. ret=%x", ret);
877 ret = ehca_dealloc_pd(&shca->pd->ib_pd);
879 ehca_err(&shca->ib_device,
880 "Cannot destroy internal PD. ret=%x", ret);
883 ret = ehca_destroy_eq(shca, &shca->neq);
885 ehca_err(&shca->ib_device,
886 "Cannot destroy NEQ. ret=%x", ret);
889 ret = ehca_destroy_eq(shca, &shca->eq);
891 ehca_err(&shca->ib_device,
892 "Cannot destroy EQ. ret=%x", ret);
895 ib_dealloc_device(&shca->ib_device);
900 static int ehca_remove(struct platform_device *dev)
902 struct ehca_shca *shca = dev_get_drvdata(&dev->dev);
906 sysfs_remove_group(&dev->dev.kobj, &ehca_dev_attr_grp);
908 if (ehca_open_aqp1 == 1) {
910 for (i = 0; i < shca->num_ports; i++) {
911 ret = ehca_destroy_aqp1(&shca->sport[i]);
913 ehca_err(&shca->ib_device,
914 "Cannot destroy AQP1 for port %x "
919 ib_unregister_device(&shca->ib_device);
921 ret = ehca_dereg_internal_maxmr(shca);
923 ehca_err(&shca->ib_device,
924 "Cannot destroy internal MR. ret=%i", ret);
926 ret = ehca_dealloc_pd(&shca->pd->ib_pd);
928 ehca_err(&shca->ib_device,
929 "Cannot destroy internal PD. ret=%i", ret);
931 ret = ehca_destroy_eq(shca, &shca->eq);
933 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%i", ret);
935 ret = ehca_destroy_eq(shca, &shca->neq);
937 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%i", ret);
939 ib_dealloc_device(&shca->ib_device);
941 spin_lock_irqsave(&shca_list_lock, flags);
942 list_del(&shca->shca_list);
943 spin_unlock_irqrestore(&shca_list_lock, flags);
948 static struct of_device_id ehca_device_table[] =
952 .compatible = "IBM,lhca",
956 MODULE_DEVICE_TABLE(of, ehca_device_table);
958 static struct platform_driver ehca_driver = {
960 .remove = ehca_remove,
963 .owner = THIS_MODULE,
964 .groups = ehca_drv_attr_groups,
965 .of_match_table = ehca_device_table,
969 void ehca_poll_eqs(unsigned long data)
971 struct ehca_shca *shca;
973 spin_lock(&shca_list_lock);
974 list_for_each_entry(shca, &shca_list, shca_list) {
975 if (shca->eq.is_initialized) {
976 /* call deadman proc only if eq ptr does not change */
977 struct ehca_eq *eq = &shca->eq;
979 volatile u64 q_ofs, q_ofs2;
981 spin_lock_irqsave(&eq->spinlock, flags);
982 q_ofs = eq->ipz_queue.current_q_offset;
983 spin_unlock_irqrestore(&eq->spinlock, flags);
985 spin_lock_irqsave(&eq->spinlock, flags);
986 q_ofs2 = eq->ipz_queue.current_q_offset;
987 spin_unlock_irqrestore(&eq->spinlock, flags);
989 } while (q_ofs == q_ofs2 && max > 0);
991 ehca_process_eq(shca, 0);
994 mod_timer(&poll_eqs_timer, round_jiffies(jiffies + HZ));
995 spin_unlock(&shca_list_lock);
998 static int ehca_mem_notifier(struct notifier_block *nb,
999 unsigned long action, void *data)
1001 static unsigned long ehca_dmem_warn_time;
1002 unsigned long flags;
1005 case MEM_CANCEL_OFFLINE:
1006 case MEM_CANCEL_ONLINE:
1010 case MEM_GOING_ONLINE:
1011 case MEM_GOING_OFFLINE:
1012 /* only ok if no hca is attached to the lpar */
1013 spin_lock_irqsave(&shca_list_lock, flags);
1014 if (list_empty(&shca_list)) {
1015 spin_unlock_irqrestore(&shca_list_lock, flags);
1018 spin_unlock_irqrestore(&shca_list_lock, flags);
1019 if (printk_timed_ratelimit(&ehca_dmem_warn_time,
1021 ehca_gen_err("DMEM operations are not allowed"
1022 "in conjunction with eHCA");
1029 static struct notifier_block ehca_mem_nb = {
1030 .notifier_call = ehca_mem_notifier,
1033 static int __init ehca_module_init(void)
1037 printk(KERN_INFO "eHCA Infiniband Device Driver "
1038 "(Version " HCAD_VERSION ")\n");
1040 ret = ehca_create_comp_pool();
1042 ehca_gen_err("Cannot create comp pool.");
1046 ret = ehca_create_slab_caches();
1048 ehca_gen_err("Cannot create SLAB caches");
1053 ret = ehca_create_busmap();
1055 ehca_gen_err("Cannot create busmap.");
1059 ret = ibmebus_register_driver(&ehca_driver);
1061 ehca_gen_err("Cannot register eHCA device driver");
1066 ret = register_memory_notifier(&ehca_mem_nb);
1068 ehca_gen_err("Failed registering memory add/remove notifier");
1072 if (ehca_poll_all_eqs != 1) {
1073 ehca_gen_err("WARNING!!!");
1074 ehca_gen_err("It is possible to lose interrupts.");
1076 init_timer(&poll_eqs_timer);
1077 poll_eqs_timer.function = ehca_poll_eqs;
1078 poll_eqs_timer.expires = jiffies + HZ;
1079 add_timer(&poll_eqs_timer);
1085 ibmebus_unregister_driver(&ehca_driver);
1088 ehca_destroy_busmap();
1091 ehca_destroy_slab_caches();
1094 ehca_destroy_comp_pool();
1098 static void __exit ehca_module_exit(void)
1100 if (ehca_poll_all_eqs == 1)
1101 del_timer_sync(&poll_eqs_timer);
1103 ibmebus_unregister_driver(&ehca_driver);
1105 unregister_memory_notifier(&ehca_mem_nb);
1107 ehca_destroy_busmap();
1109 ehca_destroy_slab_caches();
1111 ehca_destroy_comp_pool();
1113 idr_destroy(&ehca_cq_idr);
1114 idr_destroy(&ehca_qp_idr);
1117 module_init(ehca_module_init);
1118 module_exit(ehca_module_exit);