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IPoIB: Use separate CQ for UD send completions
[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
fab97220
HS		 47#include "ehca_classes.h"
48#include "ehca_iverbs.h"
49#include "ehca_mrmw.h"
50#include "ehca_tools.h"
51#include "hcp_if.h"
52
14fb05b3 53#define HCAD_VERSION "0026"
39089e77 54
fab97220
HS		 55MODULE_LICENSE("Dual BSD/GPL");
56MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
57MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver");
39089e77 58MODULE_VERSION(HCAD_VERSION);
fab97220 59
e8e91f6b
RD		 60static int ehca_open_aqp1 = 0;
61static int ehca_hw_level = 0;
62static int ehca_poll_all_eqs = 1;
e8e91f6b 63
fab97220 64int ehca_debug_level = 0;
fab97220
HS		 65int ehca_nr_ports = 2;
66int ehca_use_hp_mr = 0;
67int ehca_port_act_time = 30;
fab97220 68int ehca_static_rate = -1;
4e430dcb 69int ehca_scaling_code = 0;
4faf7757 70int ehca_lock_hcalls = -1;
fab97220 71
0455e36d
JF		 72module_param_named(open_aqp1, ehca_open_aqp1, bool, S_IRUGO);
73module_param_named(debug_level, ehca_debug_level, int, S_IRUGO);
74module_param_named(hw_level, ehca_hw_level, int, S_IRUGO);
75module_param_named(nr_ports, ehca_nr_ports, int, S_IRUGO);
76module_param_named(use_hp_mr, ehca_use_hp_mr, bool, S_IRUGO);
77module_param_named(port_act_time, ehca_port_act_time, int, S_IRUGO);
78module_param_named(poll_all_eqs, ehca_poll_all_eqs, bool, S_IRUGO);
79module_param_named(static_rate, ehca_static_rate, int, S_IRUGO);
80module_param_named(scaling_code, ehca_scaling_code, bool, S_IRUGO);
4faf7757 81module_param_named(lock_hcalls, ehca_lock_hcalls, bool, S_IRUGO);
fab97220
HS		 82
83MODULE_PARM_DESC(open_aqp1,
0455e36d 84 "Open AQP1 on startup (default: no)");
fab97220 85MODULE_PARM_DESC(debug_level,
4da27d6d
JF		 86 "Amount of debug output (0: none (default), 1: traces, "
87 "2: some dumps, 3: lots)");
fab97220 88MODULE_PARM_DESC(hw_level,
0455e36d
JF		 89 "Hardware level (0: autosensing (default), "
90 "0x10..0x14: eHCA, 0x20..0x23: eHCA2)");
fab97220 91MODULE_PARM_DESC(nr_ports,
bbdd267e
HNN		 92 "number of connected ports (-1: autodetect, 1: port one only, "
93 "2: two ports (default)");
fab97220 94MODULE_PARM_DESC(use_hp_mr,
0455e36d 95 "Use high performance MRs (default: no)");
fab97220 96MODULE_PARM_DESC(port_act_time,
0455e36d 97 "Time to wait for port activation (default: 30 sec)");
fab97220 98MODULE_PARM_DESC(poll_all_eqs,
0455e36d 99 "Poll all event queues periodically (default: yes)");
fab97220 100MODULE_PARM_DESC(static_rate,
0455e36d 101 "Set permanent static rate (default: no static rate)");
4fd30060 102MODULE_PARM_DESC(scaling_code,
0455e36d 103 "Enable scaling code (default: no)");
4faf7757 104MODULE_PARM_DESC(lock_hcalls,
0455e36d 105 "Serialize all hCalls made by the driver "
4faf7757 106 "(default: autodetect)");
fab97220 107
26ed687f
JF		 108DEFINE_RWLOCK(ehca_qp_idr_lock);
109DEFINE_RWLOCK(ehca_cq_idr_lock);
fab97220
HS		 110DEFINE_IDR(ehca_qp_idr);
111DEFINE_IDR(ehca_cq_idr);
112
9844b71b
JF		 113static LIST_HEAD(shca_list); /* list of all registered ehcas */
114static DEFINE_SPINLOCK(shca_list_lock);
fab97220
HS		 115
116static struct timer_list poll_eqs_timer;
117
7e28db5d 118#ifdef CONFIG_PPC_64K_PAGES
2b94397a 119static struct kmem_cache *ctblk_cache;
7e28db5d 120
f2d91361 121void *ehca_alloc_fw_ctrlblock(gfp_t flags)
7e28db5d 122{
f2d91361 123 void *ret = kmem_cache_zalloc(ctblk_cache, flags);
7e28db5d
HNN		 124 if (!ret)
125 ehca_gen_err("Out of memory for ctblk");
126 return ret;
127}
128
129void ehca_free_fw_ctrlblock(void *ptr)
130{
131 if (ptr)
132 kmem_cache_free(ctblk_cache, ptr);
133
134}
135#endif
136
51d2bfbd
HNN		 137int ehca2ib_return_code(u64 ehca_rc)
138{
139 switch (ehca_rc) {
140 case H_SUCCESS:
141 return 0;
142 case H_RESOURCE: /* Resource in use */
143 case H_BUSY:
144 return -EBUSY;
145 case H_NOT_ENOUGH_RESOURCES: /* insufficient resources */
146 case H_CONSTRAINED: /* resource constraint */
147 case H_NO_MEM:
148 return -ENOMEM;
149 default:
150 return -EINVAL;
151 }
152}
153
fab97220
HS		 154static int ehca_create_slab_caches(void)
155{
156 int ret;
157
158 ret = ehca_init_pd_cache();
159 if (ret) {
160 ehca_gen_err("Cannot create PD SLAB cache.");
161 return ret;
162 }
163
164 ret = ehca_init_cq_cache();
165 if (ret) {
166 ehca_gen_err("Cannot create CQ SLAB cache.");
167 goto create_slab_caches2;
168 }
169
170 ret = ehca_init_qp_cache();
171 if (ret) {
172 ehca_gen_err("Cannot create QP SLAB cache.");
173 goto create_slab_caches3;
174 }
175
176 ret = ehca_init_av_cache();
177 if (ret) {
178 ehca_gen_err("Cannot create AV SLAB cache.");
179 goto create_slab_caches4;
180 }
181
182 ret = ehca_init_mrmw_cache();
183 if (ret) {
184 ehca_gen_err("Cannot create MR&MW SLAB cache.");
185 goto create_slab_caches5;
186 }
187
e2f81daf
SR		 188 ret = ehca_init_small_qp_cache();
189 if (ret) {
190 ehca_gen_err("Cannot create small queue SLAB cache.");
191 goto create_slab_caches6;
192 }
193
7e28db5d
HNN		 194#ifdef CONFIG_PPC_64K_PAGES
195 ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
196 EHCA_PAGESIZE, H_CB_ALIGNMENT,
197 SLAB_HWCACHE_ALIGN,
20c2df83 198 NULL);
7e28db5d
HNN		 199 if (!ctblk_cache) {
200 ehca_gen_err("Cannot create ctblk SLAB cache.");
e2f81daf
SR		 201 ehca_cleanup_small_qp_cache();
202 goto create_slab_caches6;
7e28db5d
HNN		 203 }
204#endif
fab97220
HS		 205 return 0;
206
e2f81daf
SR		 207create_slab_caches6:
208 ehca_cleanup_mrmw_cache();
209
fab97220
HS		 210create_slab_caches5:
211 ehca_cleanup_av_cache();
212
213create_slab_caches4:
214 ehca_cleanup_qp_cache();
215
216create_slab_caches3:
217 ehca_cleanup_cq_cache();
218
219create_slab_caches2:
220 ehca_cleanup_pd_cache();
221
222 return ret;
223}
224
225static void ehca_destroy_slab_caches(void)
226{
e2f81daf 227 ehca_cleanup_small_qp_cache();
fab97220
HS		 228 ehca_cleanup_mrmw_cache();
229 ehca_cleanup_av_cache();
230 ehca_cleanup_qp_cache();
231 ehca_cleanup_cq_cache();
232 ehca_cleanup_pd_cache();
7e28db5d
HNN		 233#ifdef CONFIG_PPC_64K_PAGES
234 if (ctblk_cache)
235 kmem_cache_destroy(ctblk_cache);
236#endif
fab97220
HS		 237}
238
2b94397a
HNN		 239#define EHCA_HCAAVER EHCA_BMASK_IBM(32, 39)
240#define EHCA_REVID EHCA_BMASK_IBM(40, 63)
fab97220 241
91f13aa3
JF		 242static struct cap_descr {
243 u64 mask;
244 char *descr;
245} hca_cap_descr[] = {
246 { HCA_CAP_AH_PORT_NR_CHECK, "HCA_CAP_AH_PORT_NR_CHECK" },
247 { HCA_CAP_ATOMIC, "HCA_CAP_ATOMIC" },
248 { HCA_CAP_AUTO_PATH_MIG, "HCA_CAP_AUTO_PATH_MIG" },
249 { HCA_CAP_BAD_P_KEY_CTR, "HCA_CAP_BAD_P_KEY_CTR" },
250 { HCA_CAP_SQD_RTS_PORT_CHANGE, "HCA_CAP_SQD_RTS_PORT_CHANGE" },
251 { HCA_CAP_CUR_QP_STATE_MOD, "HCA_CAP_CUR_QP_STATE_MOD" },
252 { HCA_CAP_INIT_TYPE, "HCA_CAP_INIT_TYPE" },
253 { HCA_CAP_PORT_ACTIVE_EVENT, "HCA_CAP_PORT_ACTIVE_EVENT" },
254 { HCA_CAP_Q_KEY_VIOL_CTR, "HCA_CAP_Q_KEY_VIOL_CTR" },
255 { HCA_CAP_WQE_RESIZE, "HCA_CAP_WQE_RESIZE" },
256 { HCA_CAP_RAW_PACKET_MCAST, "HCA_CAP_RAW_PACKET_MCAST" },
257 { HCA_CAP_SHUTDOWN_PORT, "HCA_CAP_SHUTDOWN_PORT" },
258 { HCA_CAP_RC_LL_QP, "HCA_CAP_RC_LL_QP" },
259 { HCA_CAP_SRQ, "HCA_CAP_SRQ" },
260 { HCA_CAP_UD_LL_QP, "HCA_CAP_UD_LL_QP" },
261 { HCA_CAP_RESIZE_MR, "HCA_CAP_RESIZE_MR" },
262 { HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" },
4faf7757 263 { HCA_CAP_H_ALLOC_RES_SYNC, "HCA_CAP_H_ALLOC_RES_SYNC" },
91f13aa3
JF		 264};
265
abc39d36 266static int ehca_sense_attributes(struct ehca_shca *shca)
fab97220 267{
91f13aa3 268 int i, ret = 0;
fab97220
HS		 269 u64 h_ret;
270 struct hipz_query_hca *rblock;
91f13aa3 271 struct hipz_query_port *port;
4da27d6d 272 const char *loc_code;
fab97220 273
abc39d36
JF		 274 static const u32 pgsize_map[] = {
275 HCA_CAP_MR_PGSIZE_4K, 0x1000,
276 HCA_CAP_MR_PGSIZE_64K, 0x10000,
277 HCA_CAP_MR_PGSIZE_1M, 0x100000,
278 HCA_CAP_MR_PGSIZE_16M, 0x1000000,
279 };
280
4da27d6d
JF		 281 ehca_gen_dbg("Probing adapter %s...",
282 shca->ofdev->node->full_name);
283 loc_code = of_get_property(shca->ofdev->node, "ibm,loc-code", NULL);
284 if (loc_code)
285 ehca_gen_dbg(" ... location lode=%s", loc_code);
286
f2d91361 287 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
fab97220
HS		 288 if (!rblock) {
289 ehca_gen_err("Cannot allocate rblock memory.");
290 return -ENOMEM;
291 }
292
293 h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
294 if (h_ret != H_SUCCESS) {
e3722192 295 ehca_gen_err("Cannot query device properties. h_ret=%li",
fab97220
HS		 296 h_ret);
297 ret = -EPERM;
91f13aa3 298 goto sense_attributes1;
fab97220
HS		 299 }
300
301 if (ehca_nr_ports == 1)
302 shca->num_ports = 1;
303 else
304 shca->num_ports = (u8)rblock->num_ports;
305
306 ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
307
308 if (ehca_hw_level == 0) {
309 u32 hcaaver;
310 u32 revid;
311
312 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
313 revid = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
314
315 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
316
fbb9318b
JF		 317 if (hcaaver == 1) {
318 if (revid <= 3)
319 shca->hw_level = 0x10 | (revid + 1);
320 else
321 shca->hw_level = 0x14;
322 } else if (hcaaver == 2) {
323 if (revid == 0)
324 shca->hw_level = 0x21;
325 else if (revid == 0x10)
326 shca->hw_level = 0x22;
327 else if (revid == 0x20 || revid == 0x21)
328 shca->hw_level = 0x23;
329 }
330
331 if (!shca->hw_level) {
91f13aa3
JF		 332 ehca_gen_warn("unknown hardware version"
333 " - assuming default level");
334 shca->hw_level = 0x22;
335 }
fbb9318b
JF		 336 } else
337 shca->hw_level = ehca_hw_level;
fab97220
HS		 338 ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
339
91f13aa3
JF		 340 shca->hca_cap = rblock->hca_cap_indicators;
341 ehca_gen_dbg(" ... HCA capabilities:");
342 for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
343 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
344 ehca_gen_dbg(" %s", hca_cap_descr[i].descr);
345
4faf7757
JF		 346 /* Autodetect hCall locking -- the "H_ALLOC_RESOURCE synced" flag is
347 * a firmware property, so it's valid across all adapters
348 */
349 if (ehca_lock_hcalls == -1)
350 ehca_lock_hcalls = !(shca->hca_cap & HCA_CAP_H_ALLOC_RES_SYNC);
351
abc39d36
JF		 352 /* translate supported MR page sizes; always support 4K */
353 shca->hca_cap_mr_pgsize = EHCA_PAGESIZE;
a7607c9b
JF		 354 for (i = 0; i < ARRAY_SIZE(pgsize_map); i += 2)
355 if (rblock->memory_page_size_supported & pgsize_map[i])
356 shca->hca_cap_mr_pgsize |= pgsize_map[i + 1];
5bb7d929 357
abc39d36 358 /* query max MTU from first port -- it's the same for all ports */
2b94397a 359 port = (struct hipz_query_port *)rblock;
91f13aa3
JF		 360 h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
361 if (h_ret != H_SUCCESS) {
e3722192 362 ehca_gen_err("Cannot query port properties. h_ret=%li",
91f13aa3
JF		 363 h_ret);
364 ret = -EPERM;
365 goto sense_attributes1;
366 }
367
368 shca->max_mtu = port->max_mtu;
369
370sense_attributes1:
7e28db5d 371 ehca_free_fw_ctrlblock(rblock);
fab97220
HS		 372 return ret;
373}
374
375static int init_node_guid(struct ehca_shca *shca)
376{
377 int ret = 0;
378 struct hipz_query_hca *rblock;
379
f2d91361 380 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
fab97220
HS		 381 if (!rblock) {
382 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
383 return -ENOMEM;
384 }
385
386 if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
387 ehca_err(&shca->ib_device, "Can't query device properties");
388 ret = -EINVAL;
389 goto init_node_guid1;
390 }
391
392 memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
393
394init_node_guid1:
7e28db5d 395 ehca_free_fw_ctrlblock(rblock);
fab97220
HS		 396 return ret;
397}
398
e8e91f6b 399static int ehca_init_device(struct ehca_shca *shca)
fab97220
HS		 400{
401 int ret;
402
403 ret = init_node_guid(shca);
404 if (ret)
405 return ret;
406
407 strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
408 shca->ib_device.owner = THIS_MODULE;
409
5281a4b8 410 shca->ib_device.uverbs_abi_ver = 8;
fab97220
HS		 411 shca->ib_device.uverbs_cmd_mask =
412 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
413 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
414 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
415 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
416 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
417 (1ull << IB_USER_VERBS_CMD_REG_MR) |
418 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
419 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
420 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
421 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
422 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
423 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
424 (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
425 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
426 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) |
427 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
428
07ebafba 429 shca->ib_device.node_type = RDMA_NODE_IB_CA;
fab97220 430 shca->ib_device.phys_port_cnt = shca->num_ports;
f4fd0b22 431 shca->ib_device.num_comp_vectors = 1;
6b08f3ae 432 shca->ib_device.dma_device = &shca->ofdev->dev;
fab97220
HS		 433 shca->ib_device.query_device = ehca_query_device;
434 shca->ib_device.query_port = ehca_query_port;
435 shca->ib_device.query_gid = ehca_query_gid;
436 shca->ib_device.query_pkey = ehca_query_pkey;
437 /* shca->in_device.modify_device = ehca_modify_device */
438 shca->ib_device.modify_port = ehca_modify_port;
439 shca->ib_device.alloc_ucontext = ehca_alloc_ucontext;
440 shca->ib_device.dealloc_ucontext = ehca_dealloc_ucontext;
441 shca->ib_device.alloc_pd = ehca_alloc_pd;
442 shca->ib_device.dealloc_pd = ehca_dealloc_pd;
443 shca->ib_device.create_ah = ehca_create_ah;
444 /* shca->ib_device.modify_ah = ehca_modify_ah; */
445 shca->ib_device.query_ah = ehca_query_ah;
446 shca->ib_device.destroy_ah = ehca_destroy_ah;
447 shca->ib_device.create_qp = ehca_create_qp;
448 shca->ib_device.modify_qp = ehca_modify_qp;
449 shca->ib_device.query_qp = ehca_query_qp;
450 shca->ib_device.destroy_qp = ehca_destroy_qp;
451 shca->ib_device.post_send = ehca_post_send;
452 shca->ib_device.post_recv = ehca_post_recv;
453 shca->ib_device.create_cq = ehca_create_cq;
454 shca->ib_device.destroy_cq = ehca_destroy_cq;
455 shca->ib_device.resize_cq = ehca_resize_cq;
456 shca->ib_device.poll_cq = ehca_poll_cq;
457 /* shca->ib_device.peek_cq = ehca_peek_cq; */
458 shca->ib_device.req_notify_cq = ehca_req_notify_cq;
459 /* shca->ib_device.req_ncomp_notif = ehca_req_ncomp_notif; */
460 shca->ib_device.get_dma_mr = ehca_get_dma_mr;
461 shca->ib_device.reg_phys_mr = ehca_reg_phys_mr;
462 shca->ib_device.reg_user_mr = ehca_reg_user_mr;
463 shca->ib_device.query_mr = ehca_query_mr;
464 shca->ib_device.dereg_mr = ehca_dereg_mr;
465 shca->ib_device.rereg_phys_mr = ehca_rereg_phys_mr;
466 shca->ib_device.alloc_mw = ehca_alloc_mw;
467 shca->ib_device.bind_mw = ehca_bind_mw;
468 shca->ib_device.dealloc_mw = ehca_dealloc_mw;
469 shca->ib_device.alloc_fmr = ehca_alloc_fmr;
470 shca->ib_device.map_phys_fmr = ehca_map_phys_fmr;
471 shca->ib_device.unmap_fmr = ehca_unmap_fmr;
472 shca->ib_device.dealloc_fmr = ehca_dealloc_fmr;
473 shca->ib_device.attach_mcast = ehca_attach_mcast;
474 shca->ib_device.detach_mcast = ehca_detach_mcast;
2b5e6b12 475 shca->ib_device.process_mad = ehca_process_mad;
fab97220
HS		 476 shca->ib_device.mmap = ehca_mmap;
477
a6a12947
JF		 478 if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
479 shca->ib_device.uverbs_cmd_mask |=
480 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
481 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
482 (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
483 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
484
485 shca->ib_device.create_srq = ehca_create_srq;
486 shca->ib_device.modify_srq = ehca_modify_srq;
487 shca->ib_device.query_srq = ehca_query_srq;
488 shca->ib_device.destroy_srq = ehca_destroy_srq;
489 shca->ib_device.post_srq_recv = ehca_post_srq_recv;
490 }
491
fab97220
HS		 492 return ret;
493}
494
495static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
496{
497 struct ehca_sport *sport = &shca->sport[port - 1];
498 struct ib_cq *ibcq;
499 struct ib_qp *ibqp;
500 struct ib_qp_init_attr qp_init_attr;
501 int ret;
502
503 if (sport->ibcq_aqp1) {
504 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
505 return -EPERM;
506 }
507
2b94397a 508 ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void *)(-1), 10, 0);
fab97220
HS		 509 if (IS_ERR(ibcq)) {
510 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
511 return PTR_ERR(ibcq);
512 }
513 sport->ibcq_aqp1 = ibcq;
514
b8b50e35 515 if (sport->ibqp_sqp[IB_QPT_GSI]) {
fab97220
HS		 516 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
517 ret = -EPERM;
518 goto create_aqp1;
519 }
520
521 memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
522 qp_init_attr.send_cq = ibcq;
523 qp_init_attr.recv_cq = ibcq;
524 qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
525 qp_init_attr.cap.max_send_wr = 100;
526 qp_init_attr.cap.max_recv_wr = 100;
527 qp_init_attr.cap.max_send_sge = 2;
528 qp_init_attr.cap.max_recv_sge = 1;
529 qp_init_attr.qp_type = IB_QPT_GSI;
530 qp_init_attr.port_num = port;
531 qp_init_attr.qp_context = NULL;
532 qp_init_attr.event_handler = NULL;
533 qp_init_attr.srq = NULL;
534
535 ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
536 if (IS_ERR(ibqp)) {
537 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
538 ret = PTR_ERR(ibqp);
539 goto create_aqp1;
540 }
b8b50e35 541 sport->ibqp_sqp[IB_QPT_GSI] = ibqp;
fab97220
HS		 542
543 return 0;
544
545create_aqp1:
546 ib_destroy_cq(sport->ibcq_aqp1);
547 return ret;
548}
549
550static int ehca_destroy_aqp1(struct ehca_sport *sport)
551{
552 int ret;
553
b8b50e35 554 ret = ib_destroy_qp(sport->ibqp_sqp[IB_QPT_GSI]);
fab97220 555 if (ret) {
e3722192 556 ehca_gen_err("Cannot destroy AQP1 QP. ret=%i", ret);
fab97220
HS		 557 return ret;
558 }
559
560 ret = ib_destroy_cq(sport->ibcq_aqp1);
561 if (ret)
e3722192 562 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%i", ret);
fab97220
HS		 563
564 return ret;
565}
566
567static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
568{
4da27d6d 569 return snprintf(buf, PAGE_SIZE, "%d\n", ehca_debug_level);
fab97220
HS		 570}
571
572static ssize_t ehca_store_debug_level(struct device_driver *ddp,
573 const char *buf, size_t count)
574{
575 int value = (*buf) - '0';
576 if (value >= 0 && value <= 9)
577 ehca_debug_level = value;
578 return 1;
579}
580
e8e91f6b
RD		 581static DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
582 ehca_show_debug_level, ehca_store_debug_level);
fab97220 583
bba9b601
JF		 584static struct attribute *ehca_drv_attrs[] = {
585 &driver_attr_debug_level.attr,
586 NULL
587};
fab97220 588
bba9b601
JF		 589static struct attribute_group ehca_drv_attr_grp = {
590 .attrs = ehca_drv_attrs
591};
fab97220 592
23b9c1ab
GKH		 593static struct attribute_group *ehca_drv_attr_groups[] = {
594 &ehca_drv_attr_grp,
595 NULL,
596};
597
fab97220
HS		 598#define EHCA_RESOURCE_ATTR(name) \
599static ssize_t ehca_show_##name(struct device *dev, \
600 struct device_attribute *attr, \
601 char *buf) \
602{ \
603 struct ehca_shca *shca; \
604 struct hipz_query_hca *rblock; \
605 int data; \
606 \
607 shca = dev->driver_data; \
608 \
f2d91361 609 rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL); \
fab97220 610 if (!rblock) { \
898eb71c 611 dev_err(dev, "Can't allocate rblock memory.\n"); \
fab97220
HS		 612 return 0; \
613 } \
614 \
615 if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
898eb71c 616 dev_err(dev, "Can't query device properties\n"); \
7e28db5d 617 ehca_free_fw_ctrlblock(rblock); \
fab97220
HS		 618 return 0; \
619 } \
620 \
621 data = rblock->name; \
7e28db5d 622 ehca_free_fw_ctrlblock(rblock); \
fab97220
HS		 623 \
624 if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1)) \
625 return snprintf(buf, 256, "1\n"); \
626 else \
627 return snprintf(buf, 256, "%d\n", data); \
628 \
629} \
630static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
631
632EHCA_RESOURCE_ATTR(num_ports);
633EHCA_RESOURCE_ATTR(hw_ver);
634EHCA_RESOURCE_ATTR(max_eq);
635EHCA_RESOURCE_ATTR(cur_eq);
636EHCA_RESOURCE_ATTR(max_cq);
637EHCA_RESOURCE_ATTR(cur_cq);
638EHCA_RESOURCE_ATTR(max_qp);
639EHCA_RESOURCE_ATTR(cur_qp);
640EHCA_RESOURCE_ATTR(max_mr);
641EHCA_RESOURCE_ATTR(cur_mr);
642EHCA_RESOURCE_ATTR(max_mw);
643EHCA_RESOURCE_ATTR(cur_mw);
644EHCA_RESOURCE_ATTR(max_pd);
645EHCA_RESOURCE_ATTR(max_ah);
646
647static ssize_t ehca_show_adapter_handle(struct device *dev,
648 struct device_attribute *attr,
649 char *buf)
650{
651 struct ehca_shca *shca = dev->driver_data;
652
653 return sprintf(buf, "%lx\n", shca->ipz_hca_handle.handle);
654
655}
656static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
657
bba9b601
JF		 658static struct attribute *ehca_dev_attrs[] = {
659 &dev_attr_adapter_handle.attr,
660 &dev_attr_num_ports.attr,
661 &dev_attr_hw_ver.attr,
662 &dev_attr_max_eq.attr,
663 &dev_attr_cur_eq.attr,
664 &dev_attr_max_cq.attr,
665 &dev_attr_cur_cq.attr,
666 &dev_attr_max_qp.attr,
667 &dev_attr_cur_qp.attr,
668 &dev_attr_max_mr.attr,
669 &dev_attr_cur_mr.attr,
670 &dev_attr_max_mw.attr,
671 &dev_attr_cur_mw.attr,
672 &dev_attr_max_pd.attr,
673 &dev_attr_max_ah.attr,
674 NULL
675};
fab97220 676
bba9b601
JF		 677static struct attribute_group ehca_dev_attr_grp = {
678 .attrs = ehca_dev_attrs
679};
fab97220 680
6b08f3ae 681static int __devinit ehca_probe(struct of_device *dev,
fab97220
HS		 682 const struct of_device_id *id)
683{
684 struct ehca_shca *shca;
a7edd0e6 685 const u64 *handle;
fab97220 686 struct ib_pd *ibpd;
bbdd267e 687 int ret, i;
fab97220 688
6b08f3ae 689 handle = of_get_property(dev->node, "ibm,hca-handle", NULL);
fab97220
HS		 690 if (!handle) {
691 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
6b08f3ae 692 dev->node->full_name);
fab97220
HS		 693 return -ENODEV;
694 }
695
696 if (!(*handle)) {
697 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
6b08f3ae 698 dev->node->full_name);
fab97220
HS		 699 return -ENODEV;
700 }
701
702 shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
703 if (!shca) {
704 ehca_gen_err("Cannot allocate shca memory.");
705 return -ENOMEM;
706 }
c4ed790d 707 mutex_init(&shca->modify_mutex);
bbdd267e
HNN		 708 for (i = 0; i < ARRAY_SIZE(shca->sport); i++)
709 spin_lock_init(&shca->sport[i].mod_sqp_lock);
fab97220 710
6b08f3ae 711 shca->ofdev = dev;
fab97220 712 shca->ipz_hca_handle.handle = *handle;
6b08f3ae 713 dev->dev.driver_data = shca;
fab97220
HS		 714
715 ret = ehca_sense_attributes(shca);
716 if (ret < 0) {
717 ehca_gen_err("Cannot sense eHCA attributes.");
718 goto probe1;
719 }
720
0f248d9c 721 ret = ehca_init_device(shca);
fab97220 722 if (ret) {
0f248d9c 723 ehca_gen_err("Cannot init ehca device struct");
fab97220
HS		 724 goto probe1;
725 }
726
727 /* create event queues */
728 ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, 2048);
729 if (ret) {
730 ehca_err(&shca->ib_device, "Cannot create EQ.");
0f248d9c 731 goto probe1;
fab97220
HS		 732 }
733
734 ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
735 if (ret) {
736 ehca_err(&shca->ib_device, "Cannot create NEQ.");
737 goto probe3;
738 }
739
740 /* create internal protection domain */
2b94397a 741 ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL);
fab97220
HS		 742 if (IS_ERR(ibpd)) {
743 ehca_err(&shca->ib_device, "Cannot create internal PD.");
744 ret = PTR_ERR(ibpd);
745 goto probe4;
746 }
747
748 shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
749 shca->pd->ib_pd.device = &shca->ib_device;
750
751 /* create internal max MR */
752 ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
753
754 if (ret) {
e3722192 755 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%i",
fab97220
HS		 756 ret);
757 goto probe5;
758 }
759
0f248d9c
HNN		 760 ret = ib_register_device(&shca->ib_device);
761 if (ret) {
762 ehca_err(&shca->ib_device,
e3722192 763 "ib_register_device() failed ret=%i", ret);
0f248d9c
HNN		 764 goto probe6;
765 }
766
fab97220
HS		 767 /* create AQP1 for port 1 */
768 if (ehca_open_aqp1 == 1) {
769 shca->sport[0].port_state = IB_PORT_DOWN;
770 ret = ehca_create_aqp1(shca, 1);
771 if (ret) {
772 ehca_err(&shca->ib_device,
773 "Cannot create AQP1 for port 1.");
0f248d9c 774 goto probe7;
fab97220
HS		 775 }
776 }
777
778 /* create AQP1 for port 2 */
779 if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
780 shca->sport[1].port_state = IB_PORT_DOWN;
781 ret = ehca_create_aqp1(shca, 2);
782 if (ret) {
783 ehca_err(&shca->ib_device,
784 "Cannot create AQP1 for port 2.");
0f248d9c 785 goto probe8;
fab97220
HS		 786 }
787 }
788
6b08f3ae 789 ret = sysfs_create_group(&dev->dev.kobj, &ehca_dev_attr_grp);
bba9b601
JF		 790 if (ret) /* only complain; we can live without attributes */
791 ehca_err(&shca->ib_device,
792 "Cannot create device attributes ret=%d", ret);
fab97220
HS		 793
794 spin_lock(&shca_list_lock);
795 list_add(&shca->shca_list, &shca_list);
796 spin_unlock(&shca_list_lock);
797
798 return 0;
799
0f248d9c 800probe8:
fab97220
HS		 801 ret = ehca_destroy_aqp1(&shca->sport[0]);
802 if (ret)
803 ehca_err(&shca->ib_device,
e3722192 804 "Cannot destroy AQP1 for port 1. ret=%i", ret);
fab97220 805
0f248d9c
HNN		 806probe7:
807 ib_unregister_device(&shca->ib_device);
808
fab97220
HS		 809probe6:
810 ret = ehca_dereg_internal_maxmr(shca);
811 if (ret)
812 ehca_err(&shca->ib_device,
813 "Cannot destroy internal MR. ret=%x", ret);
814
815probe5:
816 ret = ehca_dealloc_pd(&shca->pd->ib_pd);
817 if (ret)
818 ehca_err(&shca->ib_device,
819 "Cannot destroy internal PD. ret=%x", ret);
820
821probe4:
822 ret = ehca_destroy_eq(shca, &shca->neq);
823 if (ret)
824 ehca_err(&shca->ib_device,
825 "Cannot destroy NEQ. ret=%x", ret);
826
827probe3:
828 ret = ehca_destroy_eq(shca, &shca->eq);
829 if (ret)
830 ehca_err(&shca->ib_device,
831 "Cannot destroy EQ. ret=%x", ret);
832
fab97220
HS		 833probe1:
834 ib_dealloc_device(&shca->ib_device);
835
836 return -EINVAL;
837}
838
6b08f3ae 839static int __devexit ehca_remove(struct of_device *dev)
fab97220 840{
6b08f3ae 841 struct ehca_shca *shca = dev->dev.driver_data;
fab97220
HS		 842 int ret;
843
6b08f3ae 844 sysfs_remove_group(&dev->dev.kobj, &ehca_dev_attr_grp);
fab97220
HS		 845
846 if (ehca_open_aqp1 == 1) {
847 int i;
848 for (i = 0; i < shca->num_ports; i++) {
849 ret = ehca_destroy_aqp1(&shca->sport[i]);
850 if (ret)
851 ehca_err(&shca->ib_device,
852 "Cannot destroy AQP1 for port %x "
e3722192 853 "ret=%i", ret, i);
fab97220
HS		 854 }
855 }
856
857 ib_unregister_device(&shca->ib_device);
858
859 ret = ehca_dereg_internal_maxmr(shca);
860 if (ret)
861 ehca_err(&shca->ib_device,
e3722192 862 "Cannot destroy internal MR. ret=%i", ret);
fab97220
HS		 863
864 ret = ehca_dealloc_pd(&shca->pd->ib_pd);
865 if (ret)
866 ehca_err(&shca->ib_device,
e3722192 867 "Cannot destroy internal PD. ret=%i", ret);
fab97220
HS		 868
869 ret = ehca_destroy_eq(shca, &shca->eq);
870 if (ret)
e3722192 871 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%i", ret);
fab97220
HS		 872
873 ret = ehca_destroy_eq(shca, &shca->neq);
874 if (ret)
e3722192 875 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%i", ret);
fab97220
HS		 876
877 ib_dealloc_device(&shca->ib_device);
878
879 spin_lock(&shca_list_lock);
880 list_del(&shca->shca_list);
881 spin_unlock(&shca_list_lock);
882
883 return ret;
884}
885
886static struct of_device_id ehca_device_table[] =
887{
888 {
889 .name = "lhca",
890 .compatible = "IBM,lhca",
891 },
892 {},
893};
894
6b08f3ae
JF		 895static struct of_platform_driver ehca_driver = {
896 .name = "ehca",
897 .match_table = ehca_device_table,
898 .probe = ehca_probe,
899 .remove = ehca_remove,
23b9c1ab
GKH		 900 .driver = {
901 .groups = ehca_drv_attr_groups,
902 },
fab97220
HS		 903};
904
905void ehca_poll_eqs(unsigned long data)
906{
907 struct ehca_shca *shca;
908
909 spin_lock(&shca_list_lock);
910 list_for_each_entry(shca, &shca_list, shca_list) {
78d8d5f9
HNN		 911 if (shca->eq.is_initialized) {
912 /* call deadman proc only if eq ptr does not change */
913 struct ehca_eq *eq = &shca->eq;
914 int max = 3;
915 volatile u64 q_ofs, q_ofs2;
916 u64 flags;
917 spin_lock_irqsave(&eq->spinlock, flags);
918 q_ofs = eq->ipz_queue.current_q_offset;
919 spin_unlock_irqrestore(&eq->spinlock, flags);
920 do {
921 spin_lock_irqsave(&eq->spinlock, flags);
922 q_ofs2 = eq->ipz_queue.current_q_offset;
923 spin_unlock_irqrestore(&eq->spinlock, flags);
924 max--;
925 } while (q_ofs == q_ofs2 && max > 0);
926 if (q_ofs == q_ofs2)
927 ehca_process_eq(shca, 0);
928 }
fab97220 929 }
1a7d2dce 930 mod_timer(&poll_eqs_timer, round_jiffies(jiffies + HZ));
fab97220
HS		 931 spin_unlock(&shca_list_lock);
932}
933
e8e91f6b 934static int __init ehca_module_init(void)
fab97220
HS		 935{
936 int ret;
937
938 printk(KERN_INFO "eHCA Infiniband Device Driver "
39089e77 939 "(Version " HCAD_VERSION ")\n");
fab97220 940
2b94397a
HNN		 941 ret = ehca_create_comp_pool();
942 if (ret) {
fab97220
HS		 943 ehca_gen_err("Cannot create comp pool.");
944 return ret;
945 }
946
2b94397a
HNN		 947 ret = ehca_create_slab_caches();
948 if (ret) {
fab97220
HS		 949 ehca_gen_err("Cannot create SLAB caches");
950 ret = -ENOMEM;
951 goto module_init1;
952 }
953
2b94397a
HNN		 954 ret = ibmebus_register_driver(&ehca_driver);
955 if (ret) {
fab97220
HS		 956 ehca_gen_err("Cannot register eHCA device driver");
957 ret = -EINVAL;
958 goto module_init2;
959 }
960
fab97220
HS		 961 if (ehca_poll_all_eqs != 1) {
962 ehca_gen_err("WARNING!!!");
963 ehca_gen_err("It is possible to lose interrupts.");
964 } else {
965 init_timer(&poll_eqs_timer);
966 poll_eqs_timer.function = ehca_poll_eqs;
967 poll_eqs_timer.expires = jiffies + HZ;
968 add_timer(&poll_eqs_timer);
969 }
970
971 return 0;
972
973module_init2:
974 ehca_destroy_slab_caches();
975
976module_init1:
977 ehca_destroy_comp_pool();
978 return ret;
979};
980
e8e91f6b 981static void __exit ehca_module_exit(void)
fab97220
HS		 982{
983 if (ehca_poll_all_eqs == 1)
984 del_timer_sync(&poll_eqs_timer);
985
fab97220
HS		 986 ibmebus_unregister_driver(&ehca_driver);
987
988 ehca_destroy_slab_caches();
989
990 ehca_destroy_comp_pool();
991
992 idr_destroy(&ehca_cq_idr);
993 idr_destroy(&ehca_qp_idr);
994};
995
996module_init(ehca_module_init);
997module_exit(ehca_module_exit);
Linux 6.x block layer and io_uring tree(s)