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IB/ehca: Support more than 4k QPs for userspace and kernelspace
[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
fab97220
HS		 46#include "ehca_classes.h"
47#include "ehca_iverbs.h"
48#include "ehca_mrmw.h"
49#include "ehca_tools.h"
50#include "hcp_if.h"
51
52MODULE_LICENSE("Dual BSD/GPL");
53MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
54MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver");
4e430dcb 55MODULE_VERSION("SVNEHCA_0023");
fab97220
HS		 56
57int ehca_open_aqp1 = 0;
58int ehca_debug_level = 0;
59int ehca_hw_level = 0;
60int ehca_nr_ports = 2;
61int ehca_use_hp_mr = 0;
62int ehca_port_act_time = 30;
63int ehca_poll_all_eqs = 1;
64int ehca_static_rate = -1;
4e430dcb 65int ehca_scaling_code = 0;
5bb7d929 66int ehca_mr_largepage = 0;
fab97220 67
339e2640
AB		 68module_param_named(open_aqp1, ehca_open_aqp1, int, S_IRUGO);
69module_param_named(debug_level, ehca_debug_level, int, S_IRUGO);
70module_param_named(hw_level, ehca_hw_level, int, S_IRUGO);
71module_param_named(nr_ports, ehca_nr_ports, int, S_IRUGO);
72module_param_named(use_hp_mr, ehca_use_hp_mr, int, S_IRUGO);
73module_param_named(port_act_time, ehca_port_act_time, int, S_IRUGO);
74module_param_named(poll_all_eqs, ehca_poll_all_eqs, int, S_IRUGO);
75module_param_named(static_rate, ehca_static_rate, int, S_IRUGO);
76module_param_named(scaling_code, ehca_scaling_code, int, S_IRUGO);
77module_param_named(mr_largepage, ehca_mr_largepage, int, S_IRUGO);
fab97220
HS		 78
79MODULE_PARM_DESC(open_aqp1,
80 "AQP1 on startup (0: no (default), 1: yes)");
81MODULE_PARM_DESC(debug_level,
82 "debug level"
83 " (0: no debug traces (default), 1: with debug traces)");
84MODULE_PARM_DESC(hw_level,
85 "hardware level"
86 " (0: autosensing (default), 1: v. 0.20, 2: v. 0.21)");
87MODULE_PARM_DESC(nr_ports,
88 "number of connected ports (default: 2)");
89MODULE_PARM_DESC(use_hp_mr,
90 "high performance MRs (0: no (default), 1: yes)");
91MODULE_PARM_DESC(port_act_time,
92 "time to wait for port activation (default: 30 sec)");
93MODULE_PARM_DESC(poll_all_eqs,
94 "polls all event queues periodically"
95 " (0: no, 1: yes (default))");
96MODULE_PARM_DESC(static_rate,
97 "set permanent static rate (default: disabled)");
4fd30060 98MODULE_PARM_DESC(scaling_code,
b8a3ba55 99 "set scaling code (0: disabled/default, 1: enabled)");
5bb7d929
HNN		 100MODULE_PARM_DESC(mr_largepage,
101 "use large page for MR (0: use PAGE_SIZE (default), "
102 "1: use large page depending on MR size");
fab97220 103
26ed687f
JF		 104DEFINE_RWLOCK(ehca_qp_idr_lock);
105DEFINE_RWLOCK(ehca_cq_idr_lock);
fab97220
HS		 106DEFINE_IDR(ehca_qp_idr);
107DEFINE_IDR(ehca_cq_idr);
108
9844b71b
JF		 109static LIST_HEAD(shca_list); /* list of all registered ehcas */
110static DEFINE_SPINLOCK(shca_list_lock);
fab97220
HS		 111
112static struct timer_list poll_eqs_timer;
113
7e28db5d 114#ifdef CONFIG_PPC_64K_PAGES
2b94397a 115static struct kmem_cache *ctblk_cache;
7e28db5d 116
f2d91361 117void *ehca_alloc_fw_ctrlblock(gfp_t flags)
7e28db5d 118{
f2d91361 119 void *ret = kmem_cache_zalloc(ctblk_cache, flags);
7e28db5d
HNN		 120 if (!ret)
121 ehca_gen_err("Out of memory for ctblk");
122 return ret;
123}
124
125void ehca_free_fw_ctrlblock(void *ptr)
126{
127 if (ptr)
128 kmem_cache_free(ctblk_cache, ptr);
129
130}
131#endif
132
51d2bfbd
HNN		 133int ehca2ib_return_code(u64 ehca_rc)
134{
135 switch (ehca_rc) {
136 case H_SUCCESS:
137 return 0;
138 case H_RESOURCE: /* Resource in use */
139 case H_BUSY:
140 return -EBUSY;
141 case H_NOT_ENOUGH_RESOURCES: /* insufficient resources */
142 case H_CONSTRAINED: /* resource constraint */
143 case H_NO_MEM:
144 return -ENOMEM;
145 default:
146 return -EINVAL;
147 }
148}
149
fab97220
HS		 150static int ehca_create_slab_caches(void)
151{
152 int ret;
153
154 ret = ehca_init_pd_cache();
155 if (ret) {
156 ehca_gen_err("Cannot create PD SLAB cache.");
157 return ret;
158 }
159
160 ret = ehca_init_cq_cache();
161 if (ret) {
162 ehca_gen_err("Cannot create CQ SLAB cache.");
163 goto create_slab_caches2;
164 }
165
166 ret = ehca_init_qp_cache();
167 if (ret) {
168 ehca_gen_err("Cannot create QP SLAB cache.");
169 goto create_slab_caches3;
170 }
171
172 ret = ehca_init_av_cache();
173 if (ret) {
174 ehca_gen_err("Cannot create AV SLAB cache.");
175 goto create_slab_caches4;
176 }
177
178 ret = ehca_init_mrmw_cache();
179 if (ret) {
180 ehca_gen_err("Cannot create MR&MW SLAB cache.");
181 goto create_slab_caches5;
182 }
183
e2f81daf
SR		 184 ret = ehca_init_small_qp_cache();
185 if (ret) {
186 ehca_gen_err("Cannot create small queue SLAB cache.");
187 goto create_slab_caches6;
188 }
189
7e28db5d
HNN		 190#ifdef CONFIG_PPC_64K_PAGES
191 ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
192 EHCA_PAGESIZE, H_CB_ALIGNMENT,
193 SLAB_HWCACHE_ALIGN,
20c2df83 194 NULL);
7e28db5d
HNN		 195 if (!ctblk_cache) {
196 ehca_gen_err("Cannot create ctblk SLAB cache.");
e2f81daf
SR		 197 ehca_cleanup_small_qp_cache();
198 goto create_slab_caches6;
7e28db5d
HNN		 199 }
200#endif
fab97220
HS		 201 return 0;
202
e2f81daf
SR		 203create_slab_caches6:
204 ehca_cleanup_mrmw_cache();
205
fab97220
HS		 206create_slab_caches5:
207 ehca_cleanup_av_cache();
208
209create_slab_caches4:
210 ehca_cleanup_qp_cache();
211
212create_slab_caches3:
213 ehca_cleanup_cq_cache();
214
215create_slab_caches2:
216 ehca_cleanup_pd_cache();
217
218 return ret;
219}
220
221static void ehca_destroy_slab_caches(void)
222{
e2f81daf 223 ehca_cleanup_small_qp_cache();
fab97220
HS		 224 ehca_cleanup_mrmw_cache();
225 ehca_cleanup_av_cache();
226 ehca_cleanup_qp_cache();
227 ehca_cleanup_cq_cache();
228 ehca_cleanup_pd_cache();
7e28db5d
HNN		 229#ifdef CONFIG_PPC_64K_PAGES
230 if (ctblk_cache)
231 kmem_cache_destroy(ctblk_cache);
232#endif
fab97220
HS		 233}
234
2b94397a
HNN		 235#define EHCA_HCAAVER EHCA_BMASK_IBM(32, 39)
236#define EHCA_REVID EHCA_BMASK_IBM(40, 63)
fab97220 237
91f13aa3
JF		 238static struct cap_descr {
239 u64 mask;
240 char *descr;
241} hca_cap_descr[] = {
242 { HCA_CAP_AH_PORT_NR_CHECK, "HCA_CAP_AH_PORT_NR_CHECK" },
243 { HCA_CAP_ATOMIC, "HCA_CAP_ATOMIC" },
244 { HCA_CAP_AUTO_PATH_MIG, "HCA_CAP_AUTO_PATH_MIG" },
245 { HCA_CAP_BAD_P_KEY_CTR, "HCA_CAP_BAD_P_KEY_CTR" },
246 { HCA_CAP_SQD_RTS_PORT_CHANGE, "HCA_CAP_SQD_RTS_PORT_CHANGE" },
247 { HCA_CAP_CUR_QP_STATE_MOD, "HCA_CAP_CUR_QP_STATE_MOD" },
248 { HCA_CAP_INIT_TYPE, "HCA_CAP_INIT_TYPE" },
249 { HCA_CAP_PORT_ACTIVE_EVENT, "HCA_CAP_PORT_ACTIVE_EVENT" },
250 { HCA_CAP_Q_KEY_VIOL_CTR, "HCA_CAP_Q_KEY_VIOL_CTR" },
251 { HCA_CAP_WQE_RESIZE, "HCA_CAP_WQE_RESIZE" },
252 { HCA_CAP_RAW_PACKET_MCAST, "HCA_CAP_RAW_PACKET_MCAST" },
253 { HCA_CAP_SHUTDOWN_PORT, "HCA_CAP_SHUTDOWN_PORT" },
254 { HCA_CAP_RC_LL_QP, "HCA_CAP_RC_LL_QP" },
255 { HCA_CAP_SRQ, "HCA_CAP_SRQ" },
256 { HCA_CAP_UD_LL_QP, "HCA_CAP_UD_LL_QP" },
257 { HCA_CAP_RESIZE_MR, "HCA_CAP_RESIZE_MR" },
258 { HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" },
259};
260
fab97220
HS		 261int ehca_sense_attributes(struct ehca_shca *shca)
262{
91f13aa3 263 int i, ret = 0;
fab97220
HS		 264 u64 h_ret;
265 struct hipz_query_hca *rblock;
91f13aa3 266 struct hipz_query_port *port;
fab97220 267
f2d91361 268 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
fab97220
HS		 269 if (!rblock) {
270 ehca_gen_err("Cannot allocate rblock memory.");
271 return -ENOMEM;
272 }
273
274 h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
275 if (h_ret != H_SUCCESS) {
276 ehca_gen_err("Cannot query device properties. h_ret=%lx",
277 h_ret);
278 ret = -EPERM;
91f13aa3 279 goto sense_attributes1;
fab97220
HS		 280 }
281
282 if (ehca_nr_ports == 1)
283 shca->num_ports = 1;
284 else
285 shca->num_ports = (u8)rblock->num_ports;
286
287 ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
288
289 if (ehca_hw_level == 0) {
290 u32 hcaaver;
291 u32 revid;
292
293 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
294 revid = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
295
296 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
297
fbb9318b
JF		 298 if (hcaaver == 1) {
299 if (revid <= 3)
300 shca->hw_level = 0x10 | (revid + 1);
301 else
302 shca->hw_level = 0x14;
303 } else if (hcaaver == 2) {
304 if (revid == 0)
305 shca->hw_level = 0x21;
306 else if (revid == 0x10)
307 shca->hw_level = 0x22;
308 else if (revid == 0x20 || revid == 0x21)
309 shca->hw_level = 0x23;
310 }
311
312 if (!shca->hw_level) {
91f13aa3
JF		 313 ehca_gen_warn("unknown hardware version"
314 " - assuming default level");
315 shca->hw_level = 0x22;
316 }
fbb9318b
JF		 317 } else
318 shca->hw_level = ehca_hw_level;
fab97220
HS		 319 ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
320
321 shca->sport[0].rate = IB_RATE_30_GBPS;
322 shca->sport[1].rate = IB_RATE_30_GBPS;
323
91f13aa3
JF		 324 shca->hca_cap = rblock->hca_cap_indicators;
325 ehca_gen_dbg(" ... HCA capabilities:");
326 for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
327 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
328 ehca_gen_dbg(" %s", hca_cap_descr[i].descr);
329
5bb7d929
HNN		 330 shca->hca_cap_mr_pgsize = rblock->memory_page_size_supported;
331
2b94397a 332 port = (struct hipz_query_port *)rblock;
91f13aa3
JF		 333 h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
334 if (h_ret != H_SUCCESS) {
335 ehca_gen_err("Cannot query port properties. h_ret=%lx",
336 h_ret);
337 ret = -EPERM;
338 goto sense_attributes1;
339 }
340
341 shca->max_mtu = port->max_mtu;
342
343sense_attributes1:
7e28db5d 344 ehca_free_fw_ctrlblock(rblock);
fab97220
HS		 345 return ret;
346}
347
348static int init_node_guid(struct ehca_shca *shca)
349{
350 int ret = 0;
351 struct hipz_query_hca *rblock;
352
f2d91361 353 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
fab97220
HS		 354 if (!rblock) {
355 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
356 return -ENOMEM;
357 }
358
359 if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
360 ehca_err(&shca->ib_device, "Can't query device properties");
361 ret = -EINVAL;
362 goto init_node_guid1;
363 }
364
365 memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
366
367init_node_guid1:
7e28db5d 368 ehca_free_fw_ctrlblock(rblock);
fab97220
HS		 369 return ret;
370}
371
0f248d9c 372int ehca_init_device(struct ehca_shca *shca)
fab97220
HS		 373{
374 int ret;
375
376 ret = init_node_guid(shca);
377 if (ret)
378 return ret;
379
380 strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
381 shca->ib_device.owner = THIS_MODULE;
382
5281a4b8 383 shca->ib_device.uverbs_abi_ver = 8;
fab97220
HS		 384 shca->ib_device.uverbs_cmd_mask =
385 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
386 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
387 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
388 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
389 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
390 (1ull << IB_USER_VERBS_CMD_REG_MR) |
391 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
392 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
393 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
394 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
395 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
396 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
397 (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
398 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
399 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) |
400 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
401
07ebafba 402 shca->ib_device.node_type = RDMA_NODE_IB_CA;
fab97220 403 shca->ib_device.phys_port_cnt = shca->num_ports;
f4fd0b22 404 shca->ib_device.num_comp_vectors = 1;
fab97220
HS		 405 shca->ib_device.dma_device = &shca->ibmebus_dev->ofdev.dev;
406 shca->ib_device.query_device = ehca_query_device;
407 shca->ib_device.query_port = ehca_query_port;
408 shca->ib_device.query_gid = ehca_query_gid;
409 shca->ib_device.query_pkey = ehca_query_pkey;
410 /* shca->in_device.modify_device = ehca_modify_device */
411 shca->ib_device.modify_port = ehca_modify_port;
412 shca->ib_device.alloc_ucontext = ehca_alloc_ucontext;
413 shca->ib_device.dealloc_ucontext = ehca_dealloc_ucontext;
414 shca->ib_device.alloc_pd = ehca_alloc_pd;
415 shca->ib_device.dealloc_pd = ehca_dealloc_pd;
416 shca->ib_device.create_ah = ehca_create_ah;
417 /* shca->ib_device.modify_ah = ehca_modify_ah; */
418 shca->ib_device.query_ah = ehca_query_ah;
419 shca->ib_device.destroy_ah = ehca_destroy_ah;
420 shca->ib_device.create_qp = ehca_create_qp;
421 shca->ib_device.modify_qp = ehca_modify_qp;
422 shca->ib_device.query_qp = ehca_query_qp;
423 shca->ib_device.destroy_qp = ehca_destroy_qp;
424 shca->ib_device.post_send = ehca_post_send;
425 shca->ib_device.post_recv = ehca_post_recv;
426 shca->ib_device.create_cq = ehca_create_cq;
427 shca->ib_device.destroy_cq = ehca_destroy_cq;
428 shca->ib_device.resize_cq = ehca_resize_cq;
429 shca->ib_device.poll_cq = ehca_poll_cq;
430 /* shca->ib_device.peek_cq = ehca_peek_cq; */
431 shca->ib_device.req_notify_cq = ehca_req_notify_cq;
432 /* shca->ib_device.req_ncomp_notif = ehca_req_ncomp_notif; */
433 shca->ib_device.get_dma_mr = ehca_get_dma_mr;
434 shca->ib_device.reg_phys_mr = ehca_reg_phys_mr;
435 shca->ib_device.reg_user_mr = ehca_reg_user_mr;
436 shca->ib_device.query_mr = ehca_query_mr;
437 shca->ib_device.dereg_mr = ehca_dereg_mr;
438 shca->ib_device.rereg_phys_mr = ehca_rereg_phys_mr;
439 shca->ib_device.alloc_mw = ehca_alloc_mw;
440 shca->ib_device.bind_mw = ehca_bind_mw;
441 shca->ib_device.dealloc_mw = ehca_dealloc_mw;
442 shca->ib_device.alloc_fmr = ehca_alloc_fmr;
443 shca->ib_device.map_phys_fmr = ehca_map_phys_fmr;
444 shca->ib_device.unmap_fmr = ehca_unmap_fmr;
445 shca->ib_device.dealloc_fmr = ehca_dealloc_fmr;
446 shca->ib_device.attach_mcast = ehca_attach_mcast;
447 shca->ib_device.detach_mcast = ehca_detach_mcast;
448 /* shca->ib_device.process_mad = ehca_process_mad; */
449 shca->ib_device.mmap = ehca_mmap;
450
a6a12947
JF		 451 if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
452 shca->ib_device.uverbs_cmd_mask |=
453 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
454 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
455 (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
456 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
457
458 shca->ib_device.create_srq = ehca_create_srq;
459 shca->ib_device.modify_srq = ehca_modify_srq;
460 shca->ib_device.query_srq = ehca_query_srq;
461 shca->ib_device.destroy_srq = ehca_destroy_srq;
462 shca->ib_device.post_srq_recv = ehca_post_srq_recv;
463 }
464
fab97220
HS		 465 return ret;
466}
467
468static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
469{
470 struct ehca_sport *sport = &shca->sport[port - 1];
471 struct ib_cq *ibcq;
472 struct ib_qp *ibqp;
473 struct ib_qp_init_attr qp_init_attr;
474 int ret;
475
476 if (sport->ibcq_aqp1) {
477 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
478 return -EPERM;
479 }
480
2b94397a 481 ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void *)(-1), 10, 0);
fab97220
HS		 482 if (IS_ERR(ibcq)) {
483 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
484 return PTR_ERR(ibcq);
485 }
486 sport->ibcq_aqp1 = ibcq;
487
488 if (sport->ibqp_aqp1) {
489 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
490 ret = -EPERM;
491 goto create_aqp1;
492 }
493
494 memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
495 qp_init_attr.send_cq = ibcq;
496 qp_init_attr.recv_cq = ibcq;
497 qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
498 qp_init_attr.cap.max_send_wr = 100;
499 qp_init_attr.cap.max_recv_wr = 100;
500 qp_init_attr.cap.max_send_sge = 2;
501 qp_init_attr.cap.max_recv_sge = 1;
502 qp_init_attr.qp_type = IB_QPT_GSI;
503 qp_init_attr.port_num = port;
504 qp_init_attr.qp_context = NULL;
505 qp_init_attr.event_handler = NULL;
506 qp_init_attr.srq = NULL;
507
508 ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
509 if (IS_ERR(ibqp)) {
510 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
511 ret = PTR_ERR(ibqp);
512 goto create_aqp1;
513 }
514 sport->ibqp_aqp1 = ibqp;
515
516 return 0;
517
518create_aqp1:
519 ib_destroy_cq(sport->ibcq_aqp1);
520 return ret;
521}
522
523static int ehca_destroy_aqp1(struct ehca_sport *sport)
524{
525 int ret;
526
527 ret = ib_destroy_qp(sport->ibqp_aqp1);
528 if (ret) {
529 ehca_gen_err("Cannot destroy AQP1 QP. ret=%x", ret);
530 return ret;
531 }
532
533 ret = ib_destroy_cq(sport->ibcq_aqp1);
534 if (ret)
535 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%x", ret);
536
537 return ret;
538}
539
540static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
541{
78d8d5f9
HNN		 542 return snprintf(buf, PAGE_SIZE, "%d\n",
543 ehca_debug_level);
fab97220
HS		 544}
545
546static ssize_t ehca_store_debug_level(struct device_driver *ddp,
547 const char *buf, size_t count)
548{
549 int value = (*buf) - '0';
550 if (value >= 0 && value <= 9)
551 ehca_debug_level = value;
552 return 1;
553}
554
555DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
556 ehca_show_debug_level, ehca_store_debug_level);
557
bba9b601
JF		 558static struct attribute *ehca_drv_attrs[] = {
559 &driver_attr_debug_level.attr,
560 NULL
561};
fab97220 562
bba9b601
JF		 563static struct attribute_group ehca_drv_attr_grp = {
564 .attrs = ehca_drv_attrs
565};
fab97220
HS		 566
567#define EHCA_RESOURCE_ATTR(name) \
568static ssize_t ehca_show_##name(struct device *dev, \
569 struct device_attribute *attr, \
570 char *buf) \
571{ \
572 struct ehca_shca *shca; \
573 struct hipz_query_hca *rblock; \
574 int data; \
575 \
576 shca = dev->driver_data; \
577 \
f2d91361 578 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL); \
fab97220
HS		 579 if (!rblock) { \
580 dev_err(dev, "Can't allocate rblock memory."); \
581 return 0; \
582 } \
583 \
584 if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
585 dev_err(dev, "Can't query device properties"); \
7e28db5d 586 ehca_free_fw_ctrlblock(rblock); \
fab97220
HS		 587 return 0; \
588 } \
589 \
590 data = rblock->name; \
7e28db5d 591 ehca_free_fw_ctrlblock(rblock); \
fab97220
HS		 592 \
593 if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1)) \
594 return snprintf(buf, 256, "1\n"); \
595 else \
596 return snprintf(buf, 256, "%d\n", data); \
597 \
598} \
599static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
600
601EHCA_RESOURCE_ATTR(num_ports);
602EHCA_RESOURCE_ATTR(hw_ver);
603EHCA_RESOURCE_ATTR(max_eq);
604EHCA_RESOURCE_ATTR(cur_eq);
605EHCA_RESOURCE_ATTR(max_cq);
606EHCA_RESOURCE_ATTR(cur_cq);
607EHCA_RESOURCE_ATTR(max_qp);
608EHCA_RESOURCE_ATTR(cur_qp);
609EHCA_RESOURCE_ATTR(max_mr);
610EHCA_RESOURCE_ATTR(cur_mr);
611EHCA_RESOURCE_ATTR(max_mw);
612EHCA_RESOURCE_ATTR(cur_mw);
613EHCA_RESOURCE_ATTR(max_pd);
614EHCA_RESOURCE_ATTR(max_ah);
615
616static ssize_t ehca_show_adapter_handle(struct device *dev,
617 struct device_attribute *attr,
618 char *buf)
619{
620 struct ehca_shca *shca = dev->driver_data;
621
622 return sprintf(buf, "%lx\n", shca->ipz_hca_handle.handle);
623
624}
625static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
626
5bb7d929
HNN		 627static ssize_t ehca_show_mr_largepage(struct device *dev,
628 struct device_attribute *attr,
629 char *buf)
630{
631 return sprintf(buf, "%d\n", ehca_mr_largepage);
632}
633static DEVICE_ATTR(mr_largepage, S_IRUGO, ehca_show_mr_largepage, NULL);
634
bba9b601
JF		 635static struct attribute *ehca_dev_attrs[] = {
636 &dev_attr_adapter_handle.attr,
637 &dev_attr_num_ports.attr,
638 &dev_attr_hw_ver.attr,
639 &dev_attr_max_eq.attr,
640 &dev_attr_cur_eq.attr,
641 &dev_attr_max_cq.attr,
642 &dev_attr_cur_cq.attr,
643 &dev_attr_max_qp.attr,
644 &dev_attr_cur_qp.attr,
645 &dev_attr_max_mr.attr,
646 &dev_attr_cur_mr.attr,
647 &dev_attr_max_mw.attr,
648 &dev_attr_cur_mw.attr,
649 &dev_attr_max_pd.attr,
650 &dev_attr_max_ah.attr,
5bb7d929 651 &dev_attr_mr_largepage.attr,
bba9b601
JF		 652 NULL
653};
fab97220 654
bba9b601
JF		 655static struct attribute_group ehca_dev_attr_grp = {
656 .attrs = ehca_dev_attrs
657};
fab97220
HS		 658
659static int __devinit ehca_probe(struct ibmebus_dev *dev,
660 const struct of_device_id *id)
661{
662 struct ehca_shca *shca;
a7edd0e6 663 const u64 *handle;
fab97220
HS		 664 struct ib_pd *ibpd;
665 int ret;
666
40cd3a45 667 handle = of_get_property(dev->ofdev.node, "ibm,hca-handle", NULL);
fab97220
HS		 668 if (!handle) {
669 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
670 dev->ofdev.node->full_name);
671 return -ENODEV;
672 }
673
674 if (!(*handle)) {
675 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
676 dev->ofdev.node->full_name);
677 return -ENODEV;
678 }
679
680 shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
681 if (!shca) {
682 ehca_gen_err("Cannot allocate shca memory.");
683 return -ENOMEM;
684 }
c4ed790d 685 mutex_init(&shca->modify_mutex);
fab97220
HS		 686
687 shca->ibmebus_dev = dev;
688 shca->ipz_hca_handle.handle = *handle;
689 dev->ofdev.dev.driver_data = shca;
690
691 ret = ehca_sense_attributes(shca);
692 if (ret < 0) {
693 ehca_gen_err("Cannot sense eHCA attributes.");
694 goto probe1;
695 }
696
0f248d9c 697 ret = ehca_init_device(shca);
fab97220 698 if (ret) {
0f248d9c 699 ehca_gen_err("Cannot init ehca device struct");
fab97220
HS		 700 goto probe1;
701 }
702
703 /* create event queues */
704 ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, 2048);
705 if (ret) {
706 ehca_err(&shca->ib_device, "Cannot create EQ.");
0f248d9c 707 goto probe1;
fab97220
HS		 708 }
709
710 ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
711 if (ret) {
712 ehca_err(&shca->ib_device, "Cannot create NEQ.");
713 goto probe3;
714 }
715
716 /* create internal protection domain */
2b94397a 717 ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL);
fab97220
HS		 718 if (IS_ERR(ibpd)) {
719 ehca_err(&shca->ib_device, "Cannot create internal PD.");
720 ret = PTR_ERR(ibpd);
721 goto probe4;
722 }
723
724 shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
725 shca->pd->ib_pd.device = &shca->ib_device;
726
727 /* create internal max MR */
728 ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
729
730 if (ret) {
731 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%x",
732 ret);
733 goto probe5;
734 }
735
0f248d9c
HNN		 736 ret = ib_register_device(&shca->ib_device);
737 if (ret) {
738 ehca_err(&shca->ib_device,
739 "ib_register_device() failed ret=%x", ret);
740 goto probe6;
741 }
742
fab97220
HS		 743 /* create AQP1 for port 1 */
744 if (ehca_open_aqp1 == 1) {
745 shca->sport[0].port_state = IB_PORT_DOWN;
746 ret = ehca_create_aqp1(shca, 1);
747 if (ret) {
748 ehca_err(&shca->ib_device,
749 "Cannot create AQP1 for port 1.");
0f248d9c 750 goto probe7;
fab97220
HS		 751 }
752 }
753
754 /* create AQP1 for port 2 */
755 if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
756 shca->sport[1].port_state = IB_PORT_DOWN;
757 ret = ehca_create_aqp1(shca, 2);
758 if (ret) {
759 ehca_err(&shca->ib_device,
760 "Cannot create AQP1 for port 2.");
0f248d9c 761 goto probe8;
fab97220
HS		 762 }
763 }
764
bba9b601
JF		 765 ret = sysfs_create_group(&dev->ofdev.dev.kobj, &ehca_dev_attr_grp);
766 if (ret) /* only complain; we can live without attributes */
767 ehca_err(&shca->ib_device,
768 "Cannot create device attributes ret=%d", ret);
fab97220
HS		 769
770 spin_lock(&shca_list_lock);
771 list_add(&shca->shca_list, &shca_list);
772 spin_unlock(&shca_list_lock);
773
774 return 0;
775
0f248d9c 776probe8:
fab97220
HS		 777 ret = ehca_destroy_aqp1(&shca->sport[0]);
778 if (ret)
779 ehca_err(&shca->ib_device,
780 "Cannot destroy AQP1 for port 1. ret=%x", ret);
781
0f248d9c
HNN		 782probe7:
783 ib_unregister_device(&shca->ib_device);
784
fab97220
HS		 785probe6:
786 ret = ehca_dereg_internal_maxmr(shca);
787 if (ret)
788 ehca_err(&shca->ib_device,
789 "Cannot destroy internal MR. ret=%x", ret);
790
791probe5:
792 ret = ehca_dealloc_pd(&shca->pd->ib_pd);
793 if (ret)
794 ehca_err(&shca->ib_device,
795 "Cannot destroy internal PD. ret=%x", ret);
796
797probe4:
798 ret = ehca_destroy_eq(shca, &shca->neq);
799 if (ret)
800 ehca_err(&shca->ib_device,
801 "Cannot destroy NEQ. ret=%x", ret);
802
803probe3:
804 ret = ehca_destroy_eq(shca, &shca->eq);
805 if (ret)
806 ehca_err(&shca->ib_device,
807 "Cannot destroy EQ. ret=%x", ret);
808
fab97220
HS		 809probe1:
810 ib_dealloc_device(&shca->ib_device);
811
812 return -EINVAL;
813}
814
815static int __devexit ehca_remove(struct ibmebus_dev *dev)
816{
817 struct ehca_shca *shca = dev->ofdev.dev.driver_data;
818 int ret;
819
bba9b601 820 sysfs_remove_group(&dev->ofdev.dev.kobj, &ehca_dev_attr_grp);
fab97220
HS		 821
822 if (ehca_open_aqp1 == 1) {
823 int i;
824 for (i = 0; i < shca->num_ports; i++) {
825 ret = ehca_destroy_aqp1(&shca->sport[i]);
826 if (ret)
827 ehca_err(&shca->ib_device,
828 "Cannot destroy AQP1 for port %x "
829 "ret=%x", ret, i);
830 }
831 }
832
833 ib_unregister_device(&shca->ib_device);
834
835 ret = ehca_dereg_internal_maxmr(shca);
836 if (ret)
837 ehca_err(&shca->ib_device,
838 "Cannot destroy internal MR. ret=%x", ret);
839
840 ret = ehca_dealloc_pd(&shca->pd->ib_pd);
841 if (ret)
842 ehca_err(&shca->ib_device,
843 "Cannot destroy internal PD. ret=%x", ret);
844
845 ret = ehca_destroy_eq(shca, &shca->eq);
846 if (ret)
847 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%x", ret);
848
849 ret = ehca_destroy_eq(shca, &shca->neq);
850 if (ret)
851 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%x", ret);
852
853 ib_dealloc_device(&shca->ib_device);
854
855 spin_lock(&shca_list_lock);
856 list_del(&shca->shca_list);
857 spin_unlock(&shca_list_lock);
858
859 return ret;
860}
861
862static struct of_device_id ehca_device_table[] =
863{
864 {
865 .name = "lhca",
866 .compatible = "IBM,lhca",
867 },
868 {},
869};
870
871static struct ibmebus_driver ehca_driver = {
872 .name = "ehca",
873 .id_table = ehca_device_table,
874 .probe = ehca_probe,
875 .remove = ehca_remove,
876};
877
878void ehca_poll_eqs(unsigned long data)
879{
880 struct ehca_shca *shca;
881
882 spin_lock(&shca_list_lock);
883 list_for_each_entry(shca, &shca_list, shca_list) {
78d8d5f9
HNN		 884 if (shca->eq.is_initialized) {
885 /* call deadman proc only if eq ptr does not change */
886 struct ehca_eq *eq = &shca->eq;
887 int max = 3;
888 volatile u64 q_ofs, q_ofs2;
889 u64 flags;
890 spin_lock_irqsave(&eq->spinlock, flags);
891 q_ofs = eq->ipz_queue.current_q_offset;
892 spin_unlock_irqrestore(&eq->spinlock, flags);
893 do {
894 spin_lock_irqsave(&eq->spinlock, flags);
895 q_ofs2 = eq->ipz_queue.current_q_offset;
896 spin_unlock_irqrestore(&eq->spinlock, flags);
897 max--;
898 } while (q_ofs == q_ofs2 && max > 0);
899 if (q_ofs == q_ofs2)
900 ehca_process_eq(shca, 0);
901 }
fab97220
HS		 902 }
903 mod_timer(&poll_eqs_timer, jiffies + HZ);
904 spin_unlock(&shca_list_lock);
905}
906
907int __init ehca_module_init(void)
908{
909 int ret;
910
911 printk(KERN_INFO "eHCA Infiniband Device Driver "
4e430dcb 912 "(Rel.: SVNEHCA_0023)\n");
fab97220 913
2b94397a
HNN		 914 ret = ehca_create_comp_pool();
915 if (ret) {
fab97220
HS		 916 ehca_gen_err("Cannot create comp pool.");
917 return ret;
918 }
919
2b94397a
HNN		 920 ret = ehca_create_slab_caches();
921 if (ret) {
fab97220
HS		 922 ehca_gen_err("Cannot create SLAB caches");
923 ret = -ENOMEM;
924 goto module_init1;
925 }
926
2b94397a
HNN		 927 ret = ibmebus_register_driver(&ehca_driver);
928 if (ret) {
fab97220
HS		 929 ehca_gen_err("Cannot register eHCA device driver");
930 ret = -EINVAL;
931 goto module_init2;
932 }
933
bba9b601
JF		 934 ret = sysfs_create_group(&ehca_driver.driver.kobj, &ehca_drv_attr_grp);
935 if (ret) /* only complain; we can live without attributes */
936 ehca_gen_err("Cannot create driver attributes ret=%d", ret);
fab97220
HS		 937
938 if (ehca_poll_all_eqs != 1) {
939 ehca_gen_err("WARNING!!!");
940 ehca_gen_err("It is possible to lose interrupts.");
941 } else {
942 init_timer(&poll_eqs_timer);
943 poll_eqs_timer.function = ehca_poll_eqs;
944 poll_eqs_timer.expires = jiffies + HZ;
945 add_timer(&poll_eqs_timer);
946 }
947
948 return 0;
949
950module_init2:
951 ehca_destroy_slab_caches();
952
953module_init1:
954 ehca_destroy_comp_pool();
955 return ret;
956};
957
958void __exit ehca_module_exit(void)
959{
960 if (ehca_poll_all_eqs == 1)
961 del_timer_sync(&poll_eqs_timer);
962
bba9b601 963 sysfs_remove_group(&ehca_driver.driver.kobj, &ehca_drv_attr_grp);
fab97220
HS		 964 ibmebus_unregister_driver(&ehca_driver);
965
966 ehca_destroy_slab_caches();
967
968 ehca_destroy_comp_pool();
969
970 idr_destroy(&ehca_cq_idr);
971 idr_destroy(&ehca_qp_idr);
972};
973
974module_init(ehca_module_init);
975module_exit(ehca_module_exit);
Linux 6.x block layer and io_uring tree(s)