projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge branch 'timers/clockevents' of git://git.linaro.org/people/dlezcano/clockevents...
[linux-2.6-block.git] / drivers / infiniband / hw / ehca / ehca_main.c
CommitLineData
fab97220
HS		 1/*
2 * IBM eServer eHCA Infiniband device driver for Linux on POWER
3 *
4 * module start stop, hca detection
5 *
6 * Authors: Heiko J Schick <schickhj@de.ibm.com>
7 * Hoang-Nam Nguyen <hnguyen@de.ibm.com>
8 * Joachim Fenkes <fenkes@de.ibm.com>
9 *
10 * Copyright (c) 2005 IBM Corporation
11 *
12 * All rights reserved.
13 *
14 * This source code is distributed under a dual license of GPL v2.0 and OpenIB
15 * BSD.
16 *
17 * OpenIB BSD License
18 *
19 * Redistribution and use in source and binary forms, with or without
20 * modification, are permitted provided that the following conditions are met:
21 *
22 * Redistributions of source code must retain the above copyright notice, this
23 * list of conditions and the following disclaimer.
24 *
25 * Redistributions in binary form must reproduce the above copyright notice,
26 * this list of conditions and the following disclaimer in the documentation
27 * and/or other materials
28 * provided with the distribution.
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
31 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
34 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
35 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
36 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
37 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
38 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
39 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
40 * POSSIBILITY OF SUCH DAMAGE.
41 */
42
7e28db5d
HNN		 43#ifdef CONFIG_PPC_64K_PAGES
44#include <linux/slab.h>
45#endif
4faf7757 46
263c24a2
SR		 47#include <linux/notifier.h>
48#include <linux/memory.h>
fab97220
HS		 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
50d40b8e 55#define HCAD_VERSION "0029"
39089e77 56
fab97220
HS		 57MODULE_LICENSE("Dual BSD/GPL");
58MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
59MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver");
39089e77 60MODULE_VERSION(HCAD_VERSION);
fab97220 61
90ab5ee9 62static bool ehca_open_aqp1 = 0;
e8e91f6b 63static int ehca_hw_level = 0;
90ab5ee9 64static bool ehca_poll_all_eqs = 1;
e8e91f6b 65
fab97220 66int ehca_debug_level = 0;
50d40b8e 67int ehca_nr_ports = -1;
90ab5ee9 68bool ehca_use_hp_mr = 0;
fab97220 69int ehca_port_act_time = 30;
fab97220 70int ehca_static_rate = -1;
90ab5ee9 71bool ehca_scaling_code = 0;
4faf7757 72int ehca_lock_hcalls = -1;
d227fa72
SR		 73int ehca_max_cq = -1;
74int ehca_max_qp = -1;
fab97220 75
0455e36d
JF		 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);
69116f27 85module_param_named(lock_hcalls, ehca_lock_hcalls, bint, S_IRUGO);
d227fa72
SR		 86module_param_named(number_of_cqs, ehca_max_cq, int, S_IRUGO);
87module_param_named(number_of_qps, ehca_max_qp, int, S_IRUGO);
fab97220
HS		 88
89MODULE_PARM_DESC(open_aqp1,
0455e36d 90 "Open AQP1 on startup (default: no)");
fab97220 91MODULE_PARM_DESC(debug_level,
4da27d6d
JF		 92 "Amount of debug output (0: none (default), 1: traces, "
93 "2: some dumps, 3: lots)");
fab97220 94MODULE_PARM_DESC(hw_level,
0455e36d
JF		 95 "Hardware level (0: autosensing (default), "
96 "0x10..0x14: eHCA, 0x20..0x23: eHCA2)");
fab97220 97MODULE_PARM_DESC(nr_ports,
50d40b8e
AS		 98 "number of connected ports (-1: autodetect (default), "
99 "1: port one only, 2: two ports)");
fab97220 100MODULE_PARM_DESC(use_hp_mr,
0455e36d 101 "Use high performance MRs (default: no)");
fab97220 102MODULE_PARM_DESC(port_act_time,
0455e36d 103 "Time to wait for port activation (default: 30 sec)");
fab97220 104MODULE_PARM_DESC(poll_all_eqs,
0455e36d 105 "Poll all event queues periodically (default: yes)");
fab97220 106MODULE_PARM_DESC(static_rate,
0455e36d 107 "Set permanent static rate (default: no static rate)");
4fd30060 108MODULE_PARM_DESC(scaling_code,
0455e36d 109 "Enable scaling code (default: no)");
4faf7757 110MODULE_PARM_DESC(lock_hcalls,
0455e36d 111 "Serialize all hCalls made by the driver "
4faf7757 112 "(default: autodetect)");
d227fa72
SR		 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)");
fab97220 119
26ed687f
JF		 120DEFINE_RWLOCK(ehca_qp_idr_lock);
121DEFINE_RWLOCK(ehca_cq_idr_lock);
fab97220
HS		 122DEFINE_IDR(ehca_qp_idr);
123DEFINE_IDR(ehca_cq_idr);
124
9844b71b 125static LIST_HEAD(shca_list); /* list of all registered ehcas */
94202694 126DEFINE_SPINLOCK(shca_list_lock);
fab97220
HS		 127
128static struct timer_list poll_eqs_timer;
129
7e28db5d 130#ifdef CONFIG_PPC_64K_PAGES
2b94397a 131static struct kmem_cache *ctblk_cache;
7e28db5d 132
f2d91361 133void *ehca_alloc_fw_ctrlblock(gfp_t flags)
7e28db5d 134{
f2d91361 135 void *ret = kmem_cache_zalloc(ctblk_cache, flags);
7e28db5d
HNN		 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
51d2bfbd
HNN		 149int ehca2ib_return_code(u64 ehca_rc)
150{
151 switch (ehca_rc) {
152 case H_SUCCESS:
153 return 0;
154 case H_RESOURCE: /* Resource in use */
155 case H_BUSY:
156 return -EBUSY;
157 case H_NOT_ENOUGH_RESOURCES: /* insufficient resources */
158 case H_CONSTRAINED: /* resource constraint */
159 case H_NO_MEM:
160 return -ENOMEM;
161 default:
162 return -EINVAL;
163 }
164}
165
fab97220
HS		 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
e2f81daf
SR		 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
7e28db5d
HNN		 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,
20c2df83 210 NULL);
7e28db5d
HNN		 211 if (!ctblk_cache) {
212 ehca_gen_err("Cannot create ctblk SLAB cache.");
e2f81daf
SR		 213 ehca_cleanup_small_qp_cache();
214 goto create_slab_caches6;
7e28db5d
HNN		 215 }
216#endif
fab97220
HS		 217 return 0;
218
e2f81daf
SR		 219create_slab_caches6:
220 ehca_cleanup_mrmw_cache();
221
fab97220
HS		 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{
e2f81daf 239 ehca_cleanup_small_qp_cache();
fab97220
HS		 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();
7e28db5d
HNN		 245#ifdef CONFIG_PPC_64K_PAGES
246 if (ctblk_cache)
247 kmem_cache_destroy(ctblk_cache);
248#endif
fab97220
HS		 249}
250
2b94397a
HNN		 251#define EHCA_HCAAVER EHCA_BMASK_IBM(32, 39)
252#define EHCA_REVID EHCA_BMASK_IBM(40, 63)
fab97220 253
91f13aa3
JF		 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" },
4faf7757 275 { HCA_CAP_H_ALLOC_RES_SYNC, "HCA_CAP_H_ALLOC_RES_SYNC" },
91f13aa3
JF		 276};
277
abc39d36 278static int ehca_sense_attributes(struct ehca_shca *shca)
fab97220 279{
91f13aa3 280 int i, ret = 0;
fab97220
HS		 281 u64 h_ret;
282 struct hipz_query_hca *rblock;
91f13aa3 283 struct hipz_query_port *port;
4da27d6d 284 const char *loc_code;
fab97220 285
abc39d36
JF		 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
4da27d6d 293 ehca_gen_dbg("Probing adapter %s...",
61c7a080
GL		 294 shca->ofdev->dev.of_node->full_name);
295 loc_code = of_get_property(shca->ofdev->dev.of_node, "ibm,loc-code",
296 NULL);
4da27d6d
JF		 297 if (loc_code)
298 ehca_gen_dbg(" ... location lode=%s", loc_code);
299
f2d91361 300 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
fab97220
HS		 301 if (!rblock) {
302 ehca_gen_err("Cannot allocate rblock memory.");
303 return -ENOMEM;
304 }
305
306 h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
307 if (h_ret != H_SUCCESS) {
3750f605 308 ehca_gen_err("Cannot query device properties. h_ret=%lli",
fab97220
HS		 309 h_ret);
310 ret = -EPERM;
91f13aa3 311 goto sense_attributes1;
fab97220
HS		 312 }
313
314 if (ehca_nr_ports == 1)
315 shca->num_ports = 1;
316 else
317 shca->num_ports = (u8)rblock->num_ports;
318
319 ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
320
321 if (ehca_hw_level == 0) {
322 u32 hcaaver;
323 u32 revid;
324
325 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
326 revid = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
327
328 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
329
fbb9318b
JF		 330 if (hcaaver == 1) {
331 if (revid <= 3)
332 shca->hw_level = 0x10 | (revid + 1);
333 else
334 shca->hw_level = 0x14;
335 } else if (hcaaver == 2) {
336 if (revid == 0)
337 shca->hw_level = 0x21;
338 else if (revid == 0x10)
339 shca->hw_level = 0x22;
340 else if (revid == 0x20 || revid == 0x21)
341 shca->hw_level = 0x23;
342 }
343
344 if (!shca->hw_level) {
91f13aa3
JF		 345 ehca_gen_warn("unknown hardware version"
346 " - assuming default level");
347 shca->hw_level = 0x22;
348 }
fbb9318b
JF		 349 } else
350 shca->hw_level = ehca_hw_level;
fab97220
HS		 351 ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
352
91f13aa3
JF		 353 shca->hca_cap = rblock->hca_cap_indicators;
354 ehca_gen_dbg(" ... HCA capabilities:");
355 for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
356 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
357 ehca_gen_dbg(" %s", hca_cap_descr[i].descr);
358
4faf7757
JF		 359 /* Autodetect hCall locking -- the "H_ALLOC_RESOURCE synced" flag is
360 * a firmware property, so it's valid across all adapters
361 */
362 if (ehca_lock_hcalls == -1)
91fb0dd9
AS		 363 ehca_lock_hcalls = !EHCA_BMASK_GET(HCA_CAP_H_ALLOC_RES_SYNC,
364 shca->hca_cap);
4faf7757 365
abc39d36
JF		 366 /* translate supported MR page sizes; always support 4K */
367 shca->hca_cap_mr_pgsize = EHCA_PAGESIZE;
a7607c9b
JF		 368 for (i = 0; i < ARRAY_SIZE(pgsize_map); i += 2)
369 if (rblock->memory_page_size_supported & pgsize_map[i])
370 shca->hca_cap_mr_pgsize |= pgsize_map[i + 1];
5bb7d929 371
d227fa72 372 /* Set maximum number of CQs and QPs to calculate EQ size */
19f42821
SR		 373 if (shca->max_num_qps == -1)
374 shca->max_num_qps = min_t(int, rblock->max_qp,
375 EHCA_MAX_NUM_QUEUES);
376 else if (shca->max_num_qps < 1 || shca->max_num_qps > rblock->max_qp) {
377 ehca_gen_warn("The requested number of QPs is out of range "
378 "(1 - %i) specified by HW. Value is set to %i",
379 rblock->max_qp, rblock->max_qp);
380 shca->max_num_qps = rblock->max_qp;
d227fa72
SR		 381 }
382
19f42821
SR		 383 if (shca->max_num_cqs == -1)
384 shca->max_num_cqs = min_t(int, rblock->max_cq,
385 EHCA_MAX_NUM_QUEUES);
386 else if (shca->max_num_cqs < 1 || shca->max_num_cqs > rblock->max_cq) {
387 ehca_gen_warn("The requested number of CQs is out of range "
388 "(1 - %i) specified by HW. Value is set to %i",
389 rblock->max_cq, rblock->max_cq);
d227fa72
SR		 390 }
391
abc39d36 392 /* query max MTU from first port -- it's the same for all ports */
2b94397a 393 port = (struct hipz_query_port *)rblock;
91f13aa3
JF		 394 h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
395 if (h_ret != H_SUCCESS) {
3750f605 396 ehca_gen_err("Cannot query port properties. h_ret=%lli",
91f13aa3
JF		 397 h_ret);
398 ret = -EPERM;
399 goto sense_attributes1;
400 }
401
402 shca->max_mtu = port->max_mtu;
403
404sense_attributes1:
7e28db5d 405 ehca_free_fw_ctrlblock(rblock);
fab97220
HS		 406 return ret;
407}
408
409static int init_node_guid(struct ehca_shca *shca)
410{
411 int ret = 0;
412 struct hipz_query_hca *rblock;
413
f2d91361 414 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
fab97220
HS		 415 if (!rblock) {
416 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
417 return -ENOMEM;
418 }
419
420 if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
421 ehca_err(&shca->ib_device, "Can't query device properties");
422 ret = -EINVAL;
423 goto init_node_guid1;
424 }
425
426 memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
427
428init_node_guid1:
7e28db5d 429 ehca_free_fw_ctrlblock(rblock);
fab97220
HS		 430 return ret;
431}
432
e8e91f6b 433static int ehca_init_device(struct ehca_shca *shca)
fab97220
HS		 434{
435 int ret;
436
437 ret = init_node_guid(shca);
438 if (ret)
439 return ret;
440
441 strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
442 shca->ib_device.owner = THIS_MODULE;
443
5281a4b8 444 shca->ib_device.uverbs_abi_ver = 8;
fab97220
HS		 445 shca->ib_device.uverbs_cmd_mask =
446 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
447 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
448 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
449 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
450 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
451 (1ull << IB_USER_VERBS_CMD_REG_MR) |
452 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
453 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
454 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
455 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
456 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
457 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
458 (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
459 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
460 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) |
461 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
462
07ebafba 463 shca->ib_device.node_type = RDMA_NODE_IB_CA;
fab97220 464 shca->ib_device.phys_port_cnt = shca->num_ports;
f4fd0b22 465 shca->ib_device.num_comp_vectors = 1;
6b08f3ae 466 shca->ib_device.dma_device = &shca->ofdev->dev;
fab97220
HS		 467 shca->ib_device.query_device = ehca_query_device;
468 shca->ib_device.query_port = ehca_query_port;
469 shca->ib_device.query_gid = ehca_query_gid;
470 shca->ib_device.query_pkey = ehca_query_pkey;
471 /* shca->in_device.modify_device = ehca_modify_device */
472 shca->ib_device.modify_port = ehca_modify_port;
473 shca->ib_device.alloc_ucontext = ehca_alloc_ucontext;
474 shca->ib_device.dealloc_ucontext = ehca_dealloc_ucontext;
475 shca->ib_device.alloc_pd = ehca_alloc_pd;
476 shca->ib_device.dealloc_pd = ehca_dealloc_pd;
477 shca->ib_device.create_ah = ehca_create_ah;
478 /* shca->ib_device.modify_ah = ehca_modify_ah; */
479 shca->ib_device.query_ah = ehca_query_ah;
480 shca->ib_device.destroy_ah = ehca_destroy_ah;
481 shca->ib_device.create_qp = ehca_create_qp;
482 shca->ib_device.modify_qp = ehca_modify_qp;
483 shca->ib_device.query_qp = ehca_query_qp;
484 shca->ib_device.destroy_qp = ehca_destroy_qp;
485 shca->ib_device.post_send = ehca_post_send;
486 shca->ib_device.post_recv = ehca_post_recv;
487 shca->ib_device.create_cq = ehca_create_cq;
488 shca->ib_device.destroy_cq = ehca_destroy_cq;
489 shca->ib_device.resize_cq = ehca_resize_cq;
490 shca->ib_device.poll_cq = ehca_poll_cq;
491 /* shca->ib_device.peek_cq = ehca_peek_cq; */
492 shca->ib_device.req_notify_cq = ehca_req_notify_cq;
493 /* shca->ib_device.req_ncomp_notif = ehca_req_ncomp_notif; */
494 shca->ib_device.get_dma_mr = ehca_get_dma_mr;
495 shca->ib_device.reg_phys_mr = ehca_reg_phys_mr;
496 shca->ib_device.reg_user_mr = ehca_reg_user_mr;
497 shca->ib_device.query_mr = ehca_query_mr;
498 shca->ib_device.dereg_mr = ehca_dereg_mr;
499 shca->ib_device.rereg_phys_mr = ehca_rereg_phys_mr;
500 shca->ib_device.alloc_mw = ehca_alloc_mw;
501 shca->ib_device.bind_mw = ehca_bind_mw;
502 shca->ib_device.dealloc_mw = ehca_dealloc_mw;
503 shca->ib_device.alloc_fmr = ehca_alloc_fmr;
504 shca->ib_device.map_phys_fmr = ehca_map_phys_fmr;
505 shca->ib_device.unmap_fmr = ehca_unmap_fmr;
506 shca->ib_device.dealloc_fmr = ehca_dealloc_fmr;
507 shca->ib_device.attach_mcast = ehca_attach_mcast;
508 shca->ib_device.detach_mcast = ehca_detach_mcast;
2b5e6b12 509 shca->ib_device.process_mad = ehca_process_mad;
fab97220 510 shca->ib_device.mmap = ehca_mmap;
0cf89dcd 511 shca->ib_device.dma_ops = &ehca_dma_mapping_ops;
fab97220 512
a6a12947
JF		 513 if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
514 shca->ib_device.uverbs_cmd_mask |=
515 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
516 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
517 (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
518 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
519
520 shca->ib_device.create_srq = ehca_create_srq;
521 shca->ib_device.modify_srq = ehca_modify_srq;
522 shca->ib_device.query_srq = ehca_query_srq;
523 shca->ib_device.destroy_srq = ehca_destroy_srq;
524 shca->ib_device.post_srq_recv = ehca_post_srq_recv;
525 }
526
fab97220
HS		 527 return ret;
528}
529
530static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
531{
532 struct ehca_sport *sport = &shca->sport[port - 1];
533 struct ib_cq *ibcq;
534 struct ib_qp *ibqp;
535 struct ib_qp_init_attr qp_init_attr;
536 int ret;
537
538 if (sport->ibcq_aqp1) {
539 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
540 return -EPERM;
541 }
542
2b94397a 543 ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void *)(-1), 10, 0);
fab97220
HS		 544 if (IS_ERR(ibcq)) {
545 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
546 return PTR_ERR(ibcq);
547 }
548 sport->ibcq_aqp1 = ibcq;
549
b8b50e35 550 if (sport->ibqp_sqp[IB_QPT_GSI]) {
fab97220
HS		 551 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
552 ret = -EPERM;
553 goto create_aqp1;
554 }
555
556 memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
557 qp_init_attr.send_cq = ibcq;
558 qp_init_attr.recv_cq = ibcq;
559 qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
560 qp_init_attr.cap.max_send_wr = 100;
561 qp_init_attr.cap.max_recv_wr = 100;
562 qp_init_attr.cap.max_send_sge = 2;
563 qp_init_attr.cap.max_recv_sge = 1;
564 qp_init_attr.qp_type = IB_QPT_GSI;
565 qp_init_attr.port_num = port;
566 qp_init_attr.qp_context = NULL;
567 qp_init_attr.event_handler = NULL;
568 qp_init_attr.srq = NULL;
569
570 ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
571 if (IS_ERR(ibqp)) {
572 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
573 ret = PTR_ERR(ibqp);
574 goto create_aqp1;
575 }
b8b50e35 576 sport->ibqp_sqp[IB_QPT_GSI] = ibqp;
fab97220
HS		 577
578 return 0;
579
580create_aqp1:
581 ib_destroy_cq(sport->ibcq_aqp1);
582 return ret;
583}
584
585static int ehca_destroy_aqp1(struct ehca_sport *sport)
586{
587 int ret;
588
b8b50e35 589 ret = ib_destroy_qp(sport->ibqp_sqp[IB_QPT_GSI]);
fab97220 590 if (ret) {
e3722192 591 ehca_gen_err("Cannot destroy AQP1 QP. ret=%i", ret);
fab97220
HS		 592 return ret;
593 }
594
595 ret = ib_destroy_cq(sport->ibcq_aqp1);
596 if (ret)
e3722192 597 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%i", ret);
fab97220
HS		 598
599 return ret;
600}
601
602static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
603{
4da27d6d 604 return snprintf(buf, PAGE_SIZE, "%d\n", ehca_debug_level);
fab97220
HS		 605}
606
607static ssize_t ehca_store_debug_level(struct device_driver *ddp,
608 const char *buf, size_t count)
609{
610 int value = (*buf) - '0';
611 if (value >= 0 && value <= 9)
612 ehca_debug_level = value;
613 return 1;
614}
615
e8e91f6b
RD		 616static DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
617 ehca_show_debug_level, ehca_store_debug_level);
fab97220 618
bba9b601
JF		 619static struct attribute *ehca_drv_attrs[] = {
620 &driver_attr_debug_level.attr,
621 NULL
622};
fab97220 623
bba9b601
JF		 624static struct attribute_group ehca_drv_attr_grp = {
625 .attrs = ehca_drv_attrs
626};
fab97220 627
a4dbd674 628static const struct attribute_group *ehca_drv_attr_groups[] = {
23b9c1ab
GKH		 629 &ehca_drv_attr_grp,
630 NULL,
631};
632
fab97220
HS		 633#define EHCA_RESOURCE_ATTR(name) \
634static ssize_t ehca_show_##name(struct device *dev, \
635 struct device_attribute *attr, \
636 char *buf) \
637{ \
638 struct ehca_shca *shca; \
639 struct hipz_query_hca *rblock; \
640 int data; \
641 \
f899c2dd 642 shca = dev_get_drvdata(dev); \
fab97220 643 \
f2d91361 644 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL); \
fab97220 645 if (!rblock) { \
898eb71c 646 dev_err(dev, "Can't allocate rblock memory.\n"); \
fab97220
HS		 647 return 0; \
648 } \
649 \
650 if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
898eb71c 651 dev_err(dev, "Can't query device properties\n"); \
7e28db5d 652 ehca_free_fw_ctrlblock(rblock); \
fab97220
HS		 653 return 0; \
654 } \
655 \
656 data = rblock->name; \
7e28db5d 657 ehca_free_fw_ctrlblock(rblock); \
fab97220
HS		 658 \
659 if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1)) \
660 return snprintf(buf, 256, "1\n"); \
661 else \
662 return snprintf(buf, 256, "%d\n", data); \
663 \
664} \
665static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
666
667EHCA_RESOURCE_ATTR(num_ports);
668EHCA_RESOURCE_ATTR(hw_ver);
669EHCA_RESOURCE_ATTR(max_eq);
670EHCA_RESOURCE_ATTR(cur_eq);
671EHCA_RESOURCE_ATTR(max_cq);
672EHCA_RESOURCE_ATTR(cur_cq);
673EHCA_RESOURCE_ATTR(max_qp);
674EHCA_RESOURCE_ATTR(cur_qp);
675EHCA_RESOURCE_ATTR(max_mr);
676EHCA_RESOURCE_ATTR(cur_mr);
677EHCA_RESOURCE_ATTR(max_mw);
678EHCA_RESOURCE_ATTR(cur_mw);
679EHCA_RESOURCE_ATTR(max_pd);
680EHCA_RESOURCE_ATTR(max_ah);
681
682static ssize_t ehca_show_adapter_handle(struct device *dev,
683 struct device_attribute *attr,
684 char *buf)
685{
f899c2dd 686 struct ehca_shca *shca = dev_get_drvdata(dev);
fab97220 687
3750f605 688 return sprintf(buf, "%llx\n", shca->ipz_hca_handle.handle);
fab97220
HS		 689
690}
691static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
692
bba9b601
JF		 693static struct attribute *ehca_dev_attrs[] = {
694 &dev_attr_adapter_handle.attr,
695 &dev_attr_num_ports.attr,
696 &dev_attr_hw_ver.attr,
697 &dev_attr_max_eq.attr,
698 &dev_attr_cur_eq.attr,
699 &dev_attr_max_cq.attr,
700 &dev_attr_cur_cq.attr,
701 &dev_attr_max_qp.attr,
702 &dev_attr_cur_qp.attr,
703 &dev_attr_max_mr.attr,
704 &dev_attr_cur_mr.attr,
705 &dev_attr_max_mw.attr,
706 &dev_attr_cur_mw.attr,
707 &dev_attr_max_pd.attr,
708 &dev_attr_max_ah.attr,
709 NULL
710};
fab97220 711
bba9b601
JF		 712static struct attribute_group ehca_dev_attr_grp = {
713 .attrs = ehca_dev_attrs
714};
fab97220 715
c45640e4 716static int ehca_probe(struct platform_device *dev)
fab97220
HS		 717{
718 struct ehca_shca *shca;
a7edd0e6 719 const u64 *handle;
fab97220 720 struct ib_pd *ibpd;
d227fa72 721 int ret, i, eq_size;
75c21ae9 722 unsigned long flags;
fab97220 723
61c7a080 724 handle = of_get_property(dev->dev.of_node, "ibm,hca-handle", NULL);
fab97220
HS		 725 if (!handle) {
726 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
61c7a080 727 dev->dev.of_node->full_name);
fab97220
HS		 728 return -ENODEV;
729 }
730
731 if (!(*handle)) {
732 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
61c7a080 733 dev->dev.of_node->full_name);
fab97220
HS		 734 return -ENODEV;
735 }
736
737 shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
738 if (!shca) {
739 ehca_gen_err("Cannot allocate shca memory.");
740 return -ENOMEM;
741 }
19f42821 742
c4ed790d 743 mutex_init(&shca->modify_mutex);
d227fa72
SR		 744 atomic_set(&shca->num_cqs, 0);
745 atomic_set(&shca->num_qps, 0);
19f42821
SR		 746 shca->max_num_qps = ehca_max_qp;
747 shca->max_num_cqs = ehca_max_cq;
748
bbdd267e
HNN		 749 for (i = 0; i < ARRAY_SIZE(shca->sport); i++)
750 spin_lock_init(&shca->sport[i].mod_sqp_lock);
fab97220 751
6b08f3ae 752 shca->ofdev = dev;
fab97220 753 shca->ipz_hca_handle.handle = *handle;
f899c2dd 754 dev_set_drvdata(&dev->dev, shca);
fab97220
HS		 755
756 ret = ehca_sense_attributes(shca);
757 if (ret < 0) {
758 ehca_gen_err("Cannot sense eHCA attributes.");
759 goto probe1;
760 }
761
0f248d9c 762 ret = ehca_init_device(shca);
fab97220 763 if (ret) {
0f248d9c 764 ehca_gen_err("Cannot init ehca device struct");
fab97220
HS		 765 goto probe1;
766 }
767
19f42821 768 eq_size = 2 * shca->max_num_cqs + 4 * shca->max_num_qps;
fab97220 769 /* create event queues */
d227fa72 770 ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, eq_size);
fab97220
HS		 771 if (ret) {
772 ehca_err(&shca->ib_device, "Cannot create EQ.");
0f248d9c 773 goto probe1;
fab97220
HS		 774 }
775
776 ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
777 if (ret) {
778 ehca_err(&shca->ib_device, "Cannot create NEQ.");
779 goto probe3;
780 }
781
782 /* create internal protection domain */
2b94397a 783 ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL);
fab97220
HS		 784 if (IS_ERR(ibpd)) {
785 ehca_err(&shca->ib_device, "Cannot create internal PD.");
786 ret = PTR_ERR(ibpd);
787 goto probe4;
788 }
789
790 shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
791 shca->pd->ib_pd.device = &shca->ib_device;
792
793 /* create internal max MR */
794 ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
795
796 if (ret) {
e3722192 797 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%i",
fab97220
HS		 798 ret);
799 goto probe5;
800 }
801
9a6edb60 802 ret = ib_register_device(&shca->ib_device, NULL);
0f248d9c
HNN		 803 if (ret) {
804 ehca_err(&shca->ib_device,
e3722192 805 "ib_register_device() failed ret=%i", ret);
0f248d9c
HNN		 806 goto probe6;
807 }
808
fab97220
HS		 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);
813 if (ret) {
814 ehca_err(&shca->ib_device,
815 "Cannot create AQP1 for port 1.");
0f248d9c 816 goto probe7;
fab97220
HS		 817 }
818 }
819
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);
824 if (ret) {
825 ehca_err(&shca->ib_device,
826 "Cannot create AQP1 for port 2.");
0f248d9c 827 goto probe8;
fab97220
HS		 828 }
829 }
830
6b08f3ae 831 ret = sysfs_create_group(&dev->dev.kobj, &ehca_dev_attr_grp);
bba9b601
JF		 832 if (ret) /* only complain; we can live without attributes */
833 ehca_err(&shca->ib_device,
834 "Cannot create device attributes ret=%d", ret);
fab97220 835
75c21ae9 836 spin_lock_irqsave(&shca_list_lock, flags);
fab97220 837 list_add(&shca->shca_list, &shca_list);
75c21ae9 838 spin_unlock_irqrestore(&shca_list_lock, flags);
fab97220
HS		 839
840 return 0;
841
0f248d9c 842probe8:
fab97220
HS		 843 ret = ehca_destroy_aqp1(&shca->sport[0]);
844 if (ret)
845 ehca_err(&shca->ib_device,
e3722192 846 "Cannot destroy AQP1 for port 1. ret=%i", ret);
fab97220 847
0f248d9c
HNN		 848probe7:
849 ib_unregister_device(&shca->ib_device);
850
fab97220
HS		 851probe6:
852 ret = ehca_dereg_internal_maxmr(shca);
853 if (ret)
854 ehca_err(&shca->ib_device,
855 "Cannot destroy internal MR. ret=%x", ret);
856
857probe5:
858 ret = ehca_dealloc_pd(&shca->pd->ib_pd);
859 if (ret)
860 ehca_err(&shca->ib_device,
861 "Cannot destroy internal PD. ret=%x", ret);
862
863probe4:
864 ret = ehca_destroy_eq(shca, &shca->neq);
865 if (ret)
866 ehca_err(&shca->ib_device,
867 "Cannot destroy NEQ. ret=%x", ret);
868
869probe3:
870 ret = ehca_destroy_eq(shca, &shca->eq);
871 if (ret)
872 ehca_err(&shca->ib_device,
873 "Cannot destroy EQ. ret=%x", ret);
874
fab97220
HS		 875probe1:
876 ib_dealloc_device(&shca->ib_device);
877
878 return -EINVAL;
879}
880
1e6d9abe 881static int ehca_remove(struct platform_device *dev)
fab97220 882{
f899c2dd 883 struct ehca_shca *shca = dev_get_drvdata(&dev->dev);
75c21ae9 884 unsigned long flags;
fab97220
HS		 885 int ret;
886
6b08f3ae 887 sysfs_remove_group(&dev->dev.kobj, &ehca_dev_attr_grp);
fab97220
HS		 888
889 if (ehca_open_aqp1 == 1) {
890 int i;
891 for (i = 0; i < shca->num_ports; i++) {
892 ret = ehca_destroy_aqp1(&shca->sport[i]);
893 if (ret)
894 ehca_err(&shca->ib_device,
895 "Cannot destroy AQP1 for port %x "
e3722192 896 "ret=%i", ret, i);
fab97220
HS		 897 }
898 }
899
900 ib_unregister_device(&shca->ib_device);
901
902 ret = ehca_dereg_internal_maxmr(shca);
903 if (ret)
904 ehca_err(&shca->ib_device,
e3722192 905 "Cannot destroy internal MR. ret=%i", ret);
fab97220
HS		 906
907 ret = ehca_dealloc_pd(&shca->pd->ib_pd);
908 if (ret)
909 ehca_err(&shca->ib_device,
e3722192 910 "Cannot destroy internal PD. ret=%i", ret);
fab97220
HS		 911
912 ret = ehca_destroy_eq(shca, &shca->eq);
913 if (ret)
e3722192 914 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%i", ret);
fab97220
HS		 915
916 ret = ehca_destroy_eq(shca, &shca->neq);
917 if (ret)
e3722192 918 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%i", ret);
fab97220
HS		 919
920 ib_dealloc_device(&shca->ib_device);
921
75c21ae9 922 spin_lock_irqsave(&shca_list_lock, flags);
fab97220 923 list_del(&shca->shca_list);
75c21ae9 924 spin_unlock_irqrestore(&shca_list_lock, flags);
fab97220
HS		 925
926 return ret;
927}
928
929static struct of_device_id ehca_device_table[] =
930{
931 {
932 .name = "lhca",
933 .compatible = "IBM,lhca",
934 },
935 {},
936};
038919f2 937MODULE_DEVICE_TABLE(of, ehca_device_table);
fab97220 938
c45640e4 939static struct platform_driver ehca_driver = {
6b08f3ae
JF		 940 .probe = ehca_probe,
941 .remove = ehca_remove,
4018294b
GL		 942 .driver = {
943 .name = "ehca",
944 .owner = THIS_MODULE,
23b9c1ab 945 .groups = ehca_drv_attr_groups,
4018294b 946 .of_match_table = ehca_device_table,
23b9c1ab 947 },
fab97220
HS		 948};
949
950void ehca_poll_eqs(unsigned long data)
951{
952 struct ehca_shca *shca;
953
954 spin_lock(&shca_list_lock);
955 list_for_each_entry(shca, &shca_list, shca_list) {
78d8d5f9
HNN		 956 if (shca->eq.is_initialized) {
957 /* call deadman proc only if eq ptr does not change */
958 struct ehca_eq *eq = &shca->eq;
959 int max = 3;
960 volatile u64 q_ofs, q_ofs2;
7ddccb23 961 unsigned long flags;
78d8d5f9
HNN		 962 spin_lock_irqsave(&eq->spinlock, flags);
963 q_ofs = eq->ipz_queue.current_q_offset;
964 spin_unlock_irqrestore(&eq->spinlock, flags);
965 do {
966 spin_lock_irqsave(&eq->spinlock, flags);
967 q_ofs2 = eq->ipz_queue.current_q_offset;
968 spin_unlock_irqrestore(&eq->spinlock, flags);
969 max--;
970 } while (q_ofs == q_ofs2 && max > 0);
971 if (q_ofs == q_ofs2)
972 ehca_process_eq(shca, 0);
973 }
fab97220 974 }
1a7d2dce 975 mod_timer(&poll_eqs_timer, round_jiffies(jiffies + HZ));
fab97220
HS		 976 spin_unlock(&shca_list_lock);
977}
978
263c24a2
SR		 979static int ehca_mem_notifier(struct notifier_block *nb,
980 unsigned long action, void *data)
981{
982 static unsigned long ehca_dmem_warn_time;
75c21ae9 983 unsigned long flags;
263c24a2
SR		 984
985 switch (action) {
986 case MEM_CANCEL_OFFLINE:
987 case MEM_CANCEL_ONLINE:
988 case MEM_ONLINE:
989 case MEM_OFFLINE:
990 return NOTIFY_OK;
991 case MEM_GOING_ONLINE:
992 case MEM_GOING_OFFLINE:
993 /* only ok if no hca is attached to the lpar */
75c21ae9 994 spin_lock_irqsave(&shca_list_lock, flags);
263c24a2 995 if (list_empty(&shca_list)) {
75c21ae9 996 spin_unlock_irqrestore(&shca_list_lock, flags);
263c24a2
SR		 997 return NOTIFY_OK;
998 } else {
75c21ae9 999 spin_unlock_irqrestore(&shca_list_lock, flags);
263c24a2
SR		 1000 if (printk_timed_ratelimit(&ehca_dmem_warn_time,
1001 30 * 1000))
1002 ehca_gen_err("DMEM operations are not allowed"
6b1f9d64 1003 "in conjunction with eHCA");
263c24a2
SR		 1004 return NOTIFY_BAD;
1005 }
1006 }
1007 return NOTIFY_OK;
1008}
1009
1010static struct notifier_block ehca_mem_nb = {
1011 .notifier_call = ehca_mem_notifier,
1012};
1013
e8e91f6b 1014static int __init ehca_module_init(void)
fab97220
HS		 1015{
1016 int ret;
1017
1018 printk(KERN_INFO "eHCA Infiniband Device Driver "
39089e77 1019 "(Version " HCAD_VERSION ")\n");
fab97220 1020
2b94397a
HNN		 1021 ret = ehca_create_comp_pool();
1022 if (ret) {
fab97220
HS		 1023 ehca_gen_err("Cannot create comp pool.");
1024 return ret;
1025 }
1026
2b94397a
HNN		 1027 ret = ehca_create_slab_caches();
1028 if (ret) {
fab97220
HS		 1029 ehca_gen_err("Cannot create SLAB caches");
1030 ret = -ENOMEM;
1031 goto module_init1;
1032 }
1033
0cf89dcd
HH		 1034 ret = ehca_create_busmap();
1035 if (ret) {
1036 ehca_gen_err("Cannot create busmap.");
1037 goto module_init2;
1038 }
1039
2b94397a
HNN		 1040 ret = ibmebus_register_driver(&ehca_driver);
1041 if (ret) {
fab97220
HS		 1042 ehca_gen_err("Cannot register eHCA device driver");
1043 ret = -EINVAL;
0cf89dcd 1044 goto module_init3;
fab97220
HS		 1045 }
1046
263c24a2
SR		 1047 ret = register_memory_notifier(&ehca_mem_nb);
1048 if (ret) {
1049 ehca_gen_err("Failed registering memory add/remove notifier");
0cf89dcd 1050 goto module_init4;
263c24a2
SR		 1051 }
1052
fab97220
HS		 1053 if (ehca_poll_all_eqs != 1) {
1054 ehca_gen_err("WARNING!!!");
1055 ehca_gen_err("It is possible to lose interrupts.");
1056 } else {
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);
1061 }
1062
1063 return 0;
1064
0cf89dcd 1065module_init4:
263c24a2
SR		 1066 ibmebus_unregister_driver(&ehca_driver);
1067
0cf89dcd
HH		 1068module_init3:
1069 ehca_destroy_busmap();
1070
fab97220
HS		 1071module_init2:
1072 ehca_destroy_slab_caches();
1073
1074module_init1:
1075 ehca_destroy_comp_pool();
1076 return ret;
1077};
1078
e8e91f6b 1079static void __exit ehca_module_exit(void)
fab97220
HS		 1080{
1081 if (ehca_poll_all_eqs == 1)
1082 del_timer_sync(&poll_eqs_timer);
1083
fab97220
HS		 1084 ibmebus_unregister_driver(&ehca_driver);
1085
263c24a2
SR		 1086 unregister_memory_notifier(&ehca_mem_nb);
1087
0cf89dcd
HH		 1088 ehca_destroy_busmap();
1089
fab97220
HS		 1090 ehca_destroy_slab_caches();
1091
1092 ehca_destroy_comp_pool();
1093
1094 idr_destroy(&ehca_cq_idr);
1095 idr_destroy(&ehca_qp_idr);
1096};
1097
1098module_init(ehca_module_init);
1099module_exit(ehca_module_exit);
Linux 6.x block layer and io_uring tree(s)