mm: Remove slab destructors from kmem_cache_create().
[linux-2.6.git] / drivers / infiniband / hw / ehca / ehca_main.c
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
43 #ifdef CONFIG_PPC_64K_PAGES
44 #include <linux/slab.h>
45 #endif
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
52 MODULE_LICENSE("Dual BSD/GPL");
53 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
54 MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver");
55 MODULE_VERSION("SVNEHCA_0023");
56
57 int ehca_open_aqp1     = 0;
58 int ehca_debug_level   = 0;
59 int ehca_hw_level      = 0;
60 int ehca_nr_ports      = 2;
61 int ehca_use_hp_mr     = 0;
62 int ehca_port_act_time = 30;
63 int ehca_poll_all_eqs  = 1;
64 int ehca_static_rate   = -1;
65 int ehca_scaling_code  = 0;
66
67 module_param_named(open_aqp1,     ehca_open_aqp1,     int, 0);
68 module_param_named(debug_level,   ehca_debug_level,   int, 0);
69 module_param_named(hw_level,      ehca_hw_level,      int, 0);
70 module_param_named(nr_ports,      ehca_nr_ports,      int, 0);
71 module_param_named(use_hp_mr,     ehca_use_hp_mr,     int, 0);
72 module_param_named(port_act_time, ehca_port_act_time, int, 0);
73 module_param_named(poll_all_eqs,  ehca_poll_all_eqs,  int, 0);
74 module_param_named(static_rate,   ehca_static_rate,   int, 0);
75 module_param_named(scaling_code,   ehca_scaling_code,   int, 0);
76
77 MODULE_PARM_DESC(open_aqp1,
78                  "AQP1 on startup (0: no (default), 1: yes)");
79 MODULE_PARM_DESC(debug_level,
80                  "debug level"
81                  " (0: no debug traces (default), 1: with debug traces)");
82 MODULE_PARM_DESC(hw_level,
83                  "hardware level"
84                  " (0: autosensing (default), 1: v. 0.20, 2: v. 0.21)");
85 MODULE_PARM_DESC(nr_ports,
86                  "number of connected ports (default: 2)");
87 MODULE_PARM_DESC(use_hp_mr,
88                  "high performance MRs (0: no (default), 1: yes)");
89 MODULE_PARM_DESC(port_act_time,
90                  "time to wait for port activation (default: 30 sec)");
91 MODULE_PARM_DESC(poll_all_eqs,
92                  "polls all event queues periodically"
93                  " (0: no, 1: yes (default))");
94 MODULE_PARM_DESC(static_rate,
95                  "set permanent static rate (default: disabled)");
96 MODULE_PARM_DESC(scaling_code,
97                  "set scaling code (0: disabled/default, 1: enabled)");
98
99 DEFINE_RWLOCK(ehca_qp_idr_lock);
100 DEFINE_RWLOCK(ehca_cq_idr_lock);
101 DEFINE_IDR(ehca_qp_idr);
102 DEFINE_IDR(ehca_cq_idr);
103
104 static LIST_HEAD(shca_list); /* list of all registered ehcas */
105 static DEFINE_SPINLOCK(shca_list_lock);
106
107 static struct timer_list poll_eqs_timer;
108
109 #ifdef CONFIG_PPC_64K_PAGES
110 static struct kmem_cache *ctblk_cache;
111
112 void *ehca_alloc_fw_ctrlblock(gfp_t flags)
113 {
114         void *ret = kmem_cache_zalloc(ctblk_cache, flags);
115         if (!ret)
116                 ehca_gen_err("Out of memory for ctblk");
117         return ret;
118 }
119
120 void ehca_free_fw_ctrlblock(void *ptr)
121 {
122         if (ptr)
123                 kmem_cache_free(ctblk_cache, ptr);
124
125 }
126 #endif
127
128 static int ehca_create_slab_caches(void)
129 {
130         int ret;
131
132         ret = ehca_init_pd_cache();
133         if (ret) {
134                 ehca_gen_err("Cannot create PD SLAB cache.");
135                 return ret;
136         }
137
138         ret = ehca_init_cq_cache();
139         if (ret) {
140                 ehca_gen_err("Cannot create CQ SLAB cache.");
141                 goto create_slab_caches2;
142         }
143
144         ret = ehca_init_qp_cache();
145         if (ret) {
146                 ehca_gen_err("Cannot create QP SLAB cache.");
147                 goto create_slab_caches3;
148         }
149
150         ret = ehca_init_av_cache();
151         if (ret) {
152                 ehca_gen_err("Cannot create AV SLAB cache.");
153                 goto create_slab_caches4;
154         }
155
156         ret = ehca_init_mrmw_cache();
157         if (ret) {
158                 ehca_gen_err("Cannot create MR&MW SLAB cache.");
159                 goto create_slab_caches5;
160         }
161
162 #ifdef CONFIG_PPC_64K_PAGES
163         ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
164                                         EHCA_PAGESIZE, H_CB_ALIGNMENT,
165                                         SLAB_HWCACHE_ALIGN,
166                                         NULL);
167         if (!ctblk_cache) {
168                 ehca_gen_err("Cannot create ctblk SLAB cache.");
169                 ehca_cleanup_mrmw_cache();
170                 goto create_slab_caches5;
171         }
172 #endif
173         return 0;
174
175 create_slab_caches5:
176         ehca_cleanup_av_cache();
177
178 create_slab_caches4:
179         ehca_cleanup_qp_cache();
180
181 create_slab_caches3:
182         ehca_cleanup_cq_cache();
183
184 create_slab_caches2:
185         ehca_cleanup_pd_cache();
186
187         return ret;
188 }
189
190 static void ehca_destroy_slab_caches(void)
191 {
192         ehca_cleanup_mrmw_cache();
193         ehca_cleanup_av_cache();
194         ehca_cleanup_qp_cache();
195         ehca_cleanup_cq_cache();
196         ehca_cleanup_pd_cache();
197 #ifdef CONFIG_PPC_64K_PAGES
198         if (ctblk_cache)
199                 kmem_cache_destroy(ctblk_cache);
200 #endif
201 }
202
203 #define EHCA_HCAAVER  EHCA_BMASK_IBM(32, 39)
204 #define EHCA_REVID    EHCA_BMASK_IBM(40, 63)
205
206 static struct cap_descr {
207         u64 mask;
208         char *descr;
209 } hca_cap_descr[] = {
210         { HCA_CAP_AH_PORT_NR_CHECK, "HCA_CAP_AH_PORT_NR_CHECK" },
211         { HCA_CAP_ATOMIC, "HCA_CAP_ATOMIC" },
212         { HCA_CAP_AUTO_PATH_MIG, "HCA_CAP_AUTO_PATH_MIG" },
213         { HCA_CAP_BAD_P_KEY_CTR, "HCA_CAP_BAD_P_KEY_CTR" },
214         { HCA_CAP_SQD_RTS_PORT_CHANGE, "HCA_CAP_SQD_RTS_PORT_CHANGE" },
215         { HCA_CAP_CUR_QP_STATE_MOD, "HCA_CAP_CUR_QP_STATE_MOD" },
216         { HCA_CAP_INIT_TYPE, "HCA_CAP_INIT_TYPE" },
217         { HCA_CAP_PORT_ACTIVE_EVENT, "HCA_CAP_PORT_ACTIVE_EVENT" },
218         { HCA_CAP_Q_KEY_VIOL_CTR, "HCA_CAP_Q_KEY_VIOL_CTR" },
219         { HCA_CAP_WQE_RESIZE, "HCA_CAP_WQE_RESIZE" },
220         { HCA_CAP_RAW_PACKET_MCAST, "HCA_CAP_RAW_PACKET_MCAST" },
221         { HCA_CAP_SHUTDOWN_PORT, "HCA_CAP_SHUTDOWN_PORT" },
222         { HCA_CAP_RC_LL_QP, "HCA_CAP_RC_LL_QP" },
223         { HCA_CAP_SRQ, "HCA_CAP_SRQ" },
224         { HCA_CAP_UD_LL_QP, "HCA_CAP_UD_LL_QP" },
225         { HCA_CAP_RESIZE_MR, "HCA_CAP_RESIZE_MR" },
226         { HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" },
227 };
228
229 int ehca_sense_attributes(struct ehca_shca *shca)
230 {
231         int i, ret = 0;
232         u64 h_ret;
233         struct hipz_query_hca *rblock;
234         struct hipz_query_port *port;
235
236         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
237         if (!rblock) {
238                 ehca_gen_err("Cannot allocate rblock memory.");
239                 return -ENOMEM;
240         }
241
242         h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
243         if (h_ret != H_SUCCESS) {
244                 ehca_gen_err("Cannot query device properties. h_ret=%lx",
245                              h_ret);
246                 ret = -EPERM;
247                 goto sense_attributes1;
248         }
249
250         if (ehca_nr_ports == 1)
251                 shca->num_ports = 1;
252         else
253                 shca->num_ports = (u8)rblock->num_ports;
254
255         ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
256
257         if (ehca_hw_level == 0) {
258                 u32 hcaaver;
259                 u32 revid;
260
261                 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
262                 revid   = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
263
264                 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
265
266                 if (hcaaver == 1) {
267                         if (revid <= 3)
268                                 shca->hw_level = 0x10 | (revid + 1);
269                         else
270                                 shca->hw_level = 0x14;
271                 } else if (hcaaver == 2) {
272                         if (revid == 0)
273                                 shca->hw_level = 0x21;
274                         else if (revid == 0x10)
275                                 shca->hw_level = 0x22;
276                         else if (revid == 0x20 || revid == 0x21)
277                                 shca->hw_level = 0x23;
278                 }
279
280                 if (!shca->hw_level) {
281                         ehca_gen_warn("unknown hardware version"
282                                       " - assuming default level");
283                         shca->hw_level = 0x22;
284                 }
285         } else
286                 shca->hw_level = ehca_hw_level;
287         ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
288
289         shca->sport[0].rate = IB_RATE_30_GBPS;
290         shca->sport[1].rate = IB_RATE_30_GBPS;
291
292         shca->hca_cap = rblock->hca_cap_indicators;
293         ehca_gen_dbg(" ... HCA capabilities:");
294         for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
295                 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
296                         ehca_gen_dbg("   %s", hca_cap_descr[i].descr);
297
298         port = (struct hipz_query_port *)rblock;
299         h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
300         if (h_ret != H_SUCCESS) {
301                 ehca_gen_err("Cannot query port properties. h_ret=%lx",
302                              h_ret);
303                 ret = -EPERM;
304                 goto sense_attributes1;
305         }
306
307         shca->max_mtu = port->max_mtu;
308
309 sense_attributes1:
310         ehca_free_fw_ctrlblock(rblock);
311         return ret;
312 }
313
314 static int init_node_guid(struct ehca_shca *shca)
315 {
316         int ret = 0;
317         struct hipz_query_hca *rblock;
318
319         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
320         if (!rblock) {
321                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
322                 return -ENOMEM;
323         }
324
325         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
326                 ehca_err(&shca->ib_device, "Can't query device properties");
327                 ret = -EINVAL;
328                 goto init_node_guid1;
329         }
330
331         memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
332
333 init_node_guid1:
334         ehca_free_fw_ctrlblock(rblock);
335         return ret;
336 }
337
338 int ehca_init_device(struct ehca_shca *shca)
339 {
340         int ret;
341
342         ret = init_node_guid(shca);
343         if (ret)
344                 return ret;
345
346         strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
347         shca->ib_device.owner               = THIS_MODULE;
348
349         shca->ib_device.uverbs_abi_ver      = 7;
350         shca->ib_device.uverbs_cmd_mask     =
351                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
352                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
353                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
354                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
355                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
356                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
357                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
358                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
359                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
360                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
361                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
362                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
363                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
364                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
365                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
366                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
367
368         shca->ib_device.node_type           = RDMA_NODE_IB_CA;
369         shca->ib_device.phys_port_cnt       = shca->num_ports;
370         shca->ib_device.num_comp_vectors    = 1;
371         shca->ib_device.dma_device          = &shca->ibmebus_dev->ofdev.dev;
372         shca->ib_device.query_device        = ehca_query_device;
373         shca->ib_device.query_port          = ehca_query_port;
374         shca->ib_device.query_gid           = ehca_query_gid;
375         shca->ib_device.query_pkey          = ehca_query_pkey;
376         /* shca->in_device.modify_device    = ehca_modify_device    */
377         shca->ib_device.modify_port         = ehca_modify_port;
378         shca->ib_device.alloc_ucontext      = ehca_alloc_ucontext;
379         shca->ib_device.dealloc_ucontext    = ehca_dealloc_ucontext;
380         shca->ib_device.alloc_pd            = ehca_alloc_pd;
381         shca->ib_device.dealloc_pd          = ehca_dealloc_pd;
382         shca->ib_device.create_ah           = ehca_create_ah;
383         /* shca->ib_device.modify_ah        = ehca_modify_ah;       */
384         shca->ib_device.query_ah            = ehca_query_ah;
385         shca->ib_device.destroy_ah          = ehca_destroy_ah;
386         shca->ib_device.create_qp           = ehca_create_qp;
387         shca->ib_device.modify_qp           = ehca_modify_qp;
388         shca->ib_device.query_qp            = ehca_query_qp;
389         shca->ib_device.destroy_qp          = ehca_destroy_qp;
390         shca->ib_device.post_send           = ehca_post_send;
391         shca->ib_device.post_recv           = ehca_post_recv;
392         shca->ib_device.create_cq           = ehca_create_cq;
393         shca->ib_device.destroy_cq          = ehca_destroy_cq;
394         shca->ib_device.resize_cq           = ehca_resize_cq;
395         shca->ib_device.poll_cq             = ehca_poll_cq;
396         /* shca->ib_device.peek_cq          = ehca_peek_cq;         */
397         shca->ib_device.req_notify_cq       = ehca_req_notify_cq;
398         /* shca->ib_device.req_ncomp_notif  = ehca_req_ncomp_notif; */
399         shca->ib_device.get_dma_mr          = ehca_get_dma_mr;
400         shca->ib_device.reg_phys_mr         = ehca_reg_phys_mr;
401         shca->ib_device.reg_user_mr         = ehca_reg_user_mr;
402         shca->ib_device.query_mr            = ehca_query_mr;
403         shca->ib_device.dereg_mr            = ehca_dereg_mr;
404         shca->ib_device.rereg_phys_mr       = ehca_rereg_phys_mr;
405         shca->ib_device.alloc_mw            = ehca_alloc_mw;
406         shca->ib_device.bind_mw             = ehca_bind_mw;
407         shca->ib_device.dealloc_mw          = ehca_dealloc_mw;
408         shca->ib_device.alloc_fmr           = ehca_alloc_fmr;
409         shca->ib_device.map_phys_fmr        = ehca_map_phys_fmr;
410         shca->ib_device.unmap_fmr           = ehca_unmap_fmr;
411         shca->ib_device.dealloc_fmr         = ehca_dealloc_fmr;
412         shca->ib_device.attach_mcast        = ehca_attach_mcast;
413         shca->ib_device.detach_mcast        = ehca_detach_mcast;
414         /* shca->ib_device.process_mad      = ehca_process_mad;     */
415         shca->ib_device.mmap                = ehca_mmap;
416
417         if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
418                 shca->ib_device.uverbs_cmd_mask |=
419                         (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
420                         (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
421                         (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
422                         (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
423
424                 shca->ib_device.create_srq          = ehca_create_srq;
425                 shca->ib_device.modify_srq          = ehca_modify_srq;
426                 shca->ib_device.query_srq           = ehca_query_srq;
427                 shca->ib_device.destroy_srq         = ehca_destroy_srq;
428                 shca->ib_device.post_srq_recv       = ehca_post_srq_recv;
429         }
430
431         return ret;
432 }
433
434 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
435 {
436         struct ehca_sport *sport = &shca->sport[port - 1];
437         struct ib_cq *ibcq;
438         struct ib_qp *ibqp;
439         struct ib_qp_init_attr qp_init_attr;
440         int ret;
441
442         if (sport->ibcq_aqp1) {
443                 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
444                 return -EPERM;
445         }
446
447         ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void *)(-1), 10, 0);
448         if (IS_ERR(ibcq)) {
449                 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
450                 return PTR_ERR(ibcq);
451         }
452         sport->ibcq_aqp1 = ibcq;
453
454         if (sport->ibqp_aqp1) {
455                 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
456                 ret = -EPERM;
457                 goto create_aqp1;
458         }
459
460         memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
461         qp_init_attr.send_cq          = ibcq;
462         qp_init_attr.recv_cq          = ibcq;
463         qp_init_attr.sq_sig_type      = IB_SIGNAL_ALL_WR;
464         qp_init_attr.cap.max_send_wr  = 100;
465         qp_init_attr.cap.max_recv_wr  = 100;
466         qp_init_attr.cap.max_send_sge = 2;
467         qp_init_attr.cap.max_recv_sge = 1;
468         qp_init_attr.qp_type          = IB_QPT_GSI;
469         qp_init_attr.port_num         = port;
470         qp_init_attr.qp_context       = NULL;
471         qp_init_attr.event_handler    = NULL;
472         qp_init_attr.srq              = NULL;
473
474         ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
475         if (IS_ERR(ibqp)) {
476                 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
477                 ret = PTR_ERR(ibqp);
478                 goto create_aqp1;
479         }
480         sport->ibqp_aqp1 = ibqp;
481
482         return 0;
483
484 create_aqp1:
485         ib_destroy_cq(sport->ibcq_aqp1);
486         return ret;
487 }
488
489 static int ehca_destroy_aqp1(struct ehca_sport *sport)
490 {
491         int ret;
492
493         ret = ib_destroy_qp(sport->ibqp_aqp1);
494         if (ret) {
495                 ehca_gen_err("Cannot destroy AQP1 QP. ret=%x", ret);
496                 return ret;
497         }
498
499         ret = ib_destroy_cq(sport->ibcq_aqp1);
500         if (ret)
501                 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%x", ret);
502
503         return ret;
504 }
505
506 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
507 {
508         return snprintf(buf, PAGE_SIZE, "%d\n",
509                         ehca_debug_level);
510 }
511
512 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
513                                       const char *buf, size_t count)
514 {
515         int value = (*buf) - '0';
516         if (value >= 0 && value <= 9)
517                 ehca_debug_level = value;
518         return 1;
519 }
520
521 DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
522             ehca_show_debug_level, ehca_store_debug_level);
523
524 static struct attribute *ehca_drv_attrs[] = {
525         &driver_attr_debug_level.attr,
526         NULL
527 };
528
529 static struct attribute_group ehca_drv_attr_grp = {
530         .attrs = ehca_drv_attrs
531 };
532
533 #define EHCA_RESOURCE_ATTR(name)                                           \
534 static ssize_t  ehca_show_##name(struct device *dev,                       \
535                                  struct device_attribute *attr,            \
536                                  char *buf)                                \
537 {                                                                          \
538         struct ehca_shca *shca;                                            \
539         struct hipz_query_hca *rblock;                                     \
540         int data;                                                          \
541                                                                            \
542         shca = dev->driver_data;                                           \
543                                                                            \
544         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);                      \
545         if (!rblock) {                                                     \
546                 dev_err(dev, "Can't allocate rblock memory.");             \
547                 return 0;                                                  \
548         }                                                                  \
549                                                                            \
550         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
551                 dev_err(dev, "Can't query device properties");             \
552                 ehca_free_fw_ctrlblock(rblock);                            \
553                 return 0;                                                  \
554         }                                                                  \
555                                                                            \
556         data = rblock->name;                                               \
557         ehca_free_fw_ctrlblock(rblock);                                    \
558                                                                            \
559         if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1))     \
560                 return snprintf(buf, 256, "1\n");                          \
561         else                                                               \
562                 return snprintf(buf, 256, "%d\n", data);                   \
563                                                                            \
564 }                                                                          \
565 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
566
567 EHCA_RESOURCE_ATTR(num_ports);
568 EHCA_RESOURCE_ATTR(hw_ver);
569 EHCA_RESOURCE_ATTR(max_eq);
570 EHCA_RESOURCE_ATTR(cur_eq);
571 EHCA_RESOURCE_ATTR(max_cq);
572 EHCA_RESOURCE_ATTR(cur_cq);
573 EHCA_RESOURCE_ATTR(max_qp);
574 EHCA_RESOURCE_ATTR(cur_qp);
575 EHCA_RESOURCE_ATTR(max_mr);
576 EHCA_RESOURCE_ATTR(cur_mr);
577 EHCA_RESOURCE_ATTR(max_mw);
578 EHCA_RESOURCE_ATTR(cur_mw);
579 EHCA_RESOURCE_ATTR(max_pd);
580 EHCA_RESOURCE_ATTR(max_ah);
581
582 static ssize_t ehca_show_adapter_handle(struct device *dev,
583                                         struct device_attribute *attr,
584                                         char *buf)
585 {
586         struct ehca_shca *shca = dev->driver_data;
587
588         return sprintf(buf, "%lx\n", shca->ipz_hca_handle.handle);
589
590 }
591 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
592
593 static struct attribute *ehca_dev_attrs[] = {
594         &dev_attr_adapter_handle.attr,
595         &dev_attr_num_ports.attr,
596         &dev_attr_hw_ver.attr,
597         &dev_attr_max_eq.attr,
598         &dev_attr_cur_eq.attr,
599         &dev_attr_max_cq.attr,
600         &dev_attr_cur_cq.attr,
601         &dev_attr_max_qp.attr,
602         &dev_attr_cur_qp.attr,
603         &dev_attr_max_mr.attr,
604         &dev_attr_cur_mr.attr,
605         &dev_attr_max_mw.attr,
606         &dev_attr_cur_mw.attr,
607         &dev_attr_max_pd.attr,
608         &dev_attr_max_ah.attr,
609         NULL
610 };
611
612 static struct attribute_group ehca_dev_attr_grp = {
613         .attrs = ehca_dev_attrs
614 };
615
616 static int __devinit ehca_probe(struct ibmebus_dev *dev,
617                                 const struct of_device_id *id)
618 {
619         struct ehca_shca *shca;
620         const u64 *handle;
621         struct ib_pd *ibpd;
622         int ret;
623
624         handle = of_get_property(dev->ofdev.node, "ibm,hca-handle", NULL);
625         if (!handle) {
626                 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
627                              dev->ofdev.node->full_name);
628                 return -ENODEV;
629         }
630
631         if (!(*handle)) {
632                 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
633                              dev->ofdev.node->full_name);
634                 return -ENODEV;
635         }
636
637         shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
638         if (!shca) {
639                 ehca_gen_err("Cannot allocate shca memory.");
640                 return -ENOMEM;
641         }
642         mutex_init(&shca->modify_mutex);
643
644         shca->ibmebus_dev = dev;
645         shca->ipz_hca_handle.handle = *handle;
646         dev->ofdev.dev.driver_data = shca;
647
648         ret = ehca_sense_attributes(shca);
649         if (ret < 0) {
650                 ehca_gen_err("Cannot sense eHCA attributes.");
651                 goto probe1;
652         }
653
654         ret = ehca_init_device(shca);
655         if (ret) {
656                 ehca_gen_err("Cannot init ehca  device struct");
657                 goto probe1;
658         }
659
660         /* create event queues */
661         ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, 2048);
662         if (ret) {
663                 ehca_err(&shca->ib_device, "Cannot create EQ.");
664                 goto probe1;
665         }
666
667         ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
668         if (ret) {
669                 ehca_err(&shca->ib_device, "Cannot create NEQ.");
670                 goto probe3;
671         }
672
673         /* create internal protection domain */
674         ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL);
675         if (IS_ERR(ibpd)) {
676                 ehca_err(&shca->ib_device, "Cannot create internal PD.");
677                 ret = PTR_ERR(ibpd);
678                 goto probe4;
679         }
680
681         shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
682         shca->pd->ib_pd.device = &shca->ib_device;
683
684         /* create internal max MR */
685         ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
686
687         if (ret) {
688                 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%x",
689                          ret);
690                 goto probe5;
691         }
692
693         ret = ib_register_device(&shca->ib_device);
694         if (ret) {
695                 ehca_err(&shca->ib_device,
696                          "ib_register_device() failed ret=%x", ret);
697                 goto probe6;
698         }
699
700         /* create AQP1 for port 1 */
701         if (ehca_open_aqp1 == 1) {
702                 shca->sport[0].port_state = IB_PORT_DOWN;
703                 ret = ehca_create_aqp1(shca, 1);
704                 if (ret) {
705                         ehca_err(&shca->ib_device,
706                                  "Cannot create AQP1 for port 1.");
707                         goto probe7;
708                 }
709         }
710
711         /* create AQP1 for port 2 */
712         if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
713                 shca->sport[1].port_state = IB_PORT_DOWN;
714                 ret = ehca_create_aqp1(shca, 2);
715                 if (ret) {
716                         ehca_err(&shca->ib_device,
717                                  "Cannot create AQP1 for port 2.");
718                         goto probe8;
719                 }
720         }
721
722         ret = sysfs_create_group(&dev->ofdev.dev.kobj, &ehca_dev_attr_grp);
723         if (ret) /* only complain; we can live without attributes */
724                 ehca_err(&shca->ib_device,
725                          "Cannot create device attributes  ret=%d", ret);
726
727         spin_lock(&shca_list_lock);
728         list_add(&shca->shca_list, &shca_list);
729         spin_unlock(&shca_list_lock);
730
731         return 0;
732
733 probe8:
734         ret = ehca_destroy_aqp1(&shca->sport[0]);
735         if (ret)
736                 ehca_err(&shca->ib_device,
737                          "Cannot destroy AQP1 for port 1. ret=%x", ret);
738
739 probe7:
740         ib_unregister_device(&shca->ib_device);
741
742 probe6:
743         ret = ehca_dereg_internal_maxmr(shca);
744         if (ret)
745                 ehca_err(&shca->ib_device,
746                          "Cannot destroy internal MR. ret=%x", ret);
747
748 probe5:
749         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
750         if (ret)
751                 ehca_err(&shca->ib_device,
752                          "Cannot destroy internal PD. ret=%x", ret);
753
754 probe4:
755         ret = ehca_destroy_eq(shca, &shca->neq);
756         if (ret)
757                 ehca_err(&shca->ib_device,
758                          "Cannot destroy NEQ. ret=%x", ret);
759
760 probe3:
761         ret = ehca_destroy_eq(shca, &shca->eq);
762         if (ret)
763                 ehca_err(&shca->ib_device,
764                          "Cannot destroy EQ. ret=%x", ret);
765
766 probe1:
767         ib_dealloc_device(&shca->ib_device);
768
769         return -EINVAL;
770 }
771
772 static int __devexit ehca_remove(struct ibmebus_dev *dev)
773 {
774         struct ehca_shca *shca = dev->ofdev.dev.driver_data;
775         int ret;
776
777         sysfs_remove_group(&dev->ofdev.dev.kobj, &ehca_dev_attr_grp);
778
779         if (ehca_open_aqp1 == 1) {
780                 int i;
781                 for (i = 0; i < shca->num_ports; i++) {
782                         ret = ehca_destroy_aqp1(&shca->sport[i]);
783                         if (ret)
784                                 ehca_err(&shca->ib_device,
785                                          "Cannot destroy AQP1 for port %x "
786                                          "ret=%x", ret, i);
787                 }
788         }
789
790         ib_unregister_device(&shca->ib_device);
791
792         ret = ehca_dereg_internal_maxmr(shca);
793         if (ret)
794                 ehca_err(&shca->ib_device,
795                          "Cannot destroy internal MR. ret=%x", ret);
796
797         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
798         if (ret)
799                 ehca_err(&shca->ib_device,
800                          "Cannot destroy internal PD. ret=%x", ret);
801
802         ret = ehca_destroy_eq(shca, &shca->eq);
803         if (ret)
804                 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%x", ret);
805
806         ret = ehca_destroy_eq(shca, &shca->neq);
807         if (ret)
808                 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%x", ret);
809
810         ib_dealloc_device(&shca->ib_device);
811
812         spin_lock(&shca_list_lock);
813         list_del(&shca->shca_list);
814         spin_unlock(&shca_list_lock);
815
816         return ret;
817 }
818
819 static struct of_device_id ehca_device_table[] =
820 {
821         {
822                 .name       = "lhca",
823                 .compatible = "IBM,lhca",
824         },
825         {},
826 };
827
828 static struct ibmebus_driver ehca_driver = {
829         .name     = "ehca",
830         .id_table = ehca_device_table,
831         .probe    = ehca_probe,
832         .remove   = ehca_remove,
833 };
834
835 void ehca_poll_eqs(unsigned long data)
836 {
837         struct ehca_shca *shca;
838
839         spin_lock(&shca_list_lock);
840         list_for_each_entry(shca, &shca_list, shca_list) {
841                 if (shca->eq.is_initialized) {
842                         /* call deadman proc only if eq ptr does not change */
843                         struct ehca_eq *eq = &shca->eq;
844                         int max = 3;
845                         volatile u64 q_ofs, q_ofs2;
846                         u64 flags;
847                         spin_lock_irqsave(&eq->spinlock, flags);
848                         q_ofs = eq->ipz_queue.current_q_offset;
849                         spin_unlock_irqrestore(&eq->spinlock, flags);
850                         do {
851                                 spin_lock_irqsave(&eq->spinlock, flags);
852                                 q_ofs2 = eq->ipz_queue.current_q_offset;
853                                 spin_unlock_irqrestore(&eq->spinlock, flags);
854                                 max--;
855                         } while (q_ofs == q_ofs2 && max > 0);
856                         if (q_ofs == q_ofs2)
857                                 ehca_process_eq(shca, 0);
858                 }
859         }
860         mod_timer(&poll_eqs_timer, jiffies + HZ);
861         spin_unlock(&shca_list_lock);
862 }
863
864 int __init ehca_module_init(void)
865 {
866         int ret;
867
868         printk(KERN_INFO "eHCA Infiniband Device Driver "
869                "(Rel.: SVNEHCA_0023)\n");
870
871         ret = ehca_create_comp_pool();
872         if (ret) {
873                 ehca_gen_err("Cannot create comp pool.");
874                 return ret;
875         }
876
877         ret = ehca_create_slab_caches();
878         if (ret) {
879                 ehca_gen_err("Cannot create SLAB caches");
880                 ret = -ENOMEM;
881                 goto module_init1;
882         }
883
884         ret = ibmebus_register_driver(&ehca_driver);
885         if (ret) {
886                 ehca_gen_err("Cannot register eHCA device driver");
887                 ret = -EINVAL;
888                 goto module_init2;
889         }
890
891         ret = sysfs_create_group(&ehca_driver.driver.kobj, &ehca_drv_attr_grp);
892         if (ret) /* only complain; we can live without attributes */
893                 ehca_gen_err("Cannot create driver attributes  ret=%d", ret);
894
895         if (ehca_poll_all_eqs != 1) {
896                 ehca_gen_err("WARNING!!!");
897                 ehca_gen_err("It is possible to lose interrupts.");
898         } else {
899                 init_timer(&poll_eqs_timer);
900                 poll_eqs_timer.function = ehca_poll_eqs;
901                 poll_eqs_timer.expires = jiffies + HZ;
902                 add_timer(&poll_eqs_timer);
903         }
904
905         return 0;
906
907 module_init2:
908         ehca_destroy_slab_caches();
909
910 module_init1:
911         ehca_destroy_comp_pool();
912         return ret;
913 };
914
915 void __exit ehca_module_exit(void)
916 {
917         if (ehca_poll_all_eqs == 1)
918                 del_timer_sync(&poll_eqs_timer);
919
920         sysfs_remove_group(&ehca_driver.driver.kobj, &ehca_drv_attr_grp);
921         ibmebus_unregister_driver(&ehca_driver);
922
923         ehca_destroy_slab_caches();
924
925         ehca_destroy_comp_pool();
926
927         idr_destroy(&ehca_cq_idr);
928         idr_destroy(&ehca_qp_idr);
929 };
930
931 module_init(ehca_module_init);
932 module_exit(ehca_module_exit);