Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw
[linux-2.6] / 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
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
53 #define HCAD_VERSION "0025"
54
55 MODULE_LICENSE("Dual BSD/GPL");
56 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
57 MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver");
58 MODULE_VERSION(HCAD_VERSION);
59
60 static int ehca_open_aqp1     = 0;
61 static int ehca_hw_level      = 0;
62 static int ehca_poll_all_eqs  = 1;
63 static int ehca_mr_largepage  = 1;
64
65 int ehca_debug_level   = 0;
66 int ehca_nr_ports      = 2;
67 int ehca_use_hp_mr     = 0;
68 int ehca_port_act_time = 30;
69 int ehca_static_rate   = -1;
70 int ehca_scaling_code  = 0;
71 int ehca_lock_hcalls   = -1;
72
73 module_param_named(open_aqp1,     ehca_open_aqp1,     int, S_IRUGO);
74 module_param_named(debug_level,   ehca_debug_level,   int, S_IRUGO);
75 module_param_named(hw_level,      ehca_hw_level,      int, S_IRUGO);
76 module_param_named(nr_ports,      ehca_nr_ports,      int, S_IRUGO);
77 module_param_named(use_hp_mr,     ehca_use_hp_mr,     int, S_IRUGO);
78 module_param_named(port_act_time, ehca_port_act_time, int, S_IRUGO);
79 module_param_named(poll_all_eqs,  ehca_poll_all_eqs,  int, S_IRUGO);
80 module_param_named(static_rate,   ehca_static_rate,   int, S_IRUGO);
81 module_param_named(scaling_code,  ehca_scaling_code,  int, S_IRUGO);
82 module_param_named(mr_largepage,  ehca_mr_largepage,  int, S_IRUGO);
83 module_param_named(lock_hcalls,   ehca_lock_hcalls,   bool, S_IRUGO);
84
85 MODULE_PARM_DESC(open_aqp1,
86                  "AQP1 on startup (0: no (default), 1: yes)");
87 MODULE_PARM_DESC(debug_level,
88                  "debug level"
89                  " (0: no debug traces (default), 1: with debug traces)");
90 MODULE_PARM_DESC(hw_level,
91                  "hardware level"
92                  " (0: autosensing (default), 1: v. 0.20, 2: v. 0.21)");
93 MODULE_PARM_DESC(nr_ports,
94                  "number of connected ports (-1: autodetect, 1: port one only, "
95                  "2: two ports (default)");
96 MODULE_PARM_DESC(use_hp_mr,
97                  "high performance MRs (0: no (default), 1: yes)");
98 MODULE_PARM_DESC(port_act_time,
99                  "time to wait for port activation (default: 30 sec)");
100 MODULE_PARM_DESC(poll_all_eqs,
101                  "polls all event queues periodically"
102                  " (0: no, 1: yes (default))");
103 MODULE_PARM_DESC(static_rate,
104                  "set permanent static rate (default: disabled)");
105 MODULE_PARM_DESC(scaling_code,
106                  "set scaling code (0: disabled/default, 1: enabled)");
107 MODULE_PARM_DESC(mr_largepage,
108                  "use large page for MR (0: use PAGE_SIZE (default), "
109                  "1: use large page depending on MR size");
110 MODULE_PARM_DESC(lock_hcalls,
111                  "serialize all hCalls made by the driver "
112                  "(default: autodetect)");
113
114 DEFINE_RWLOCK(ehca_qp_idr_lock);
115 DEFINE_RWLOCK(ehca_cq_idr_lock);
116 DEFINE_IDR(ehca_qp_idr);
117 DEFINE_IDR(ehca_cq_idr);
118
119 static LIST_HEAD(shca_list); /* list of all registered ehcas */
120 static DEFINE_SPINLOCK(shca_list_lock);
121
122 static struct timer_list poll_eqs_timer;
123
124 #ifdef CONFIG_PPC_64K_PAGES
125 static struct kmem_cache *ctblk_cache;
126
127 void *ehca_alloc_fw_ctrlblock(gfp_t flags)
128 {
129         void *ret = kmem_cache_zalloc(ctblk_cache, flags);
130         if (!ret)
131                 ehca_gen_err("Out of memory for ctblk");
132         return ret;
133 }
134
135 void ehca_free_fw_ctrlblock(void *ptr)
136 {
137         if (ptr)
138                 kmem_cache_free(ctblk_cache, ptr);
139
140 }
141 #endif
142
143 int ehca2ib_return_code(u64 ehca_rc)
144 {
145         switch (ehca_rc) {
146         case H_SUCCESS:
147                 return 0;
148         case H_RESOURCE:             /* Resource in use */
149         case H_BUSY:
150                 return -EBUSY;
151         case H_NOT_ENOUGH_RESOURCES: /* insufficient resources */
152         case H_CONSTRAINED:          /* resource constraint */
153         case H_NO_MEM:
154                 return -ENOMEM;
155         default:
156                 return -EINVAL;
157         }
158 }
159
160 static int ehca_create_slab_caches(void)
161 {
162         int ret;
163
164         ret = ehca_init_pd_cache();
165         if (ret) {
166                 ehca_gen_err("Cannot create PD SLAB cache.");
167                 return ret;
168         }
169
170         ret = ehca_init_cq_cache();
171         if (ret) {
172                 ehca_gen_err("Cannot create CQ SLAB cache.");
173                 goto create_slab_caches2;
174         }
175
176         ret = ehca_init_qp_cache();
177         if (ret) {
178                 ehca_gen_err("Cannot create QP SLAB cache.");
179                 goto create_slab_caches3;
180         }
181
182         ret = ehca_init_av_cache();
183         if (ret) {
184                 ehca_gen_err("Cannot create AV SLAB cache.");
185                 goto create_slab_caches4;
186         }
187
188         ret = ehca_init_mrmw_cache();
189         if (ret) {
190                 ehca_gen_err("Cannot create MR&MW SLAB cache.");
191                 goto create_slab_caches5;
192         }
193
194         ret = ehca_init_small_qp_cache();
195         if (ret) {
196                 ehca_gen_err("Cannot create small queue SLAB cache.");
197                 goto create_slab_caches6;
198         }
199
200 #ifdef CONFIG_PPC_64K_PAGES
201         ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
202                                         EHCA_PAGESIZE, H_CB_ALIGNMENT,
203                                         SLAB_HWCACHE_ALIGN,
204                                         NULL);
205         if (!ctblk_cache) {
206                 ehca_gen_err("Cannot create ctblk SLAB cache.");
207                 ehca_cleanup_small_qp_cache();
208                 goto create_slab_caches6;
209         }
210 #endif
211         return 0;
212
213 create_slab_caches6:
214         ehca_cleanup_mrmw_cache();
215
216 create_slab_caches5:
217         ehca_cleanup_av_cache();
218
219 create_slab_caches4:
220         ehca_cleanup_qp_cache();
221
222 create_slab_caches3:
223         ehca_cleanup_cq_cache();
224
225 create_slab_caches2:
226         ehca_cleanup_pd_cache();
227
228         return ret;
229 }
230
231 static void ehca_destroy_slab_caches(void)
232 {
233         ehca_cleanup_small_qp_cache();
234         ehca_cleanup_mrmw_cache();
235         ehca_cleanup_av_cache();
236         ehca_cleanup_qp_cache();
237         ehca_cleanup_cq_cache();
238         ehca_cleanup_pd_cache();
239 #ifdef CONFIG_PPC_64K_PAGES
240         if (ctblk_cache)
241                 kmem_cache_destroy(ctblk_cache);
242 #endif
243 }
244
245 #define EHCA_HCAAVER  EHCA_BMASK_IBM(32, 39)
246 #define EHCA_REVID    EHCA_BMASK_IBM(40, 63)
247
248 static struct cap_descr {
249         u64 mask;
250         char *descr;
251 } hca_cap_descr[] = {
252         { HCA_CAP_AH_PORT_NR_CHECK, "HCA_CAP_AH_PORT_NR_CHECK" },
253         { HCA_CAP_ATOMIC, "HCA_CAP_ATOMIC" },
254         { HCA_CAP_AUTO_PATH_MIG, "HCA_CAP_AUTO_PATH_MIG" },
255         { HCA_CAP_BAD_P_KEY_CTR, "HCA_CAP_BAD_P_KEY_CTR" },
256         { HCA_CAP_SQD_RTS_PORT_CHANGE, "HCA_CAP_SQD_RTS_PORT_CHANGE" },
257         { HCA_CAP_CUR_QP_STATE_MOD, "HCA_CAP_CUR_QP_STATE_MOD" },
258         { HCA_CAP_INIT_TYPE, "HCA_CAP_INIT_TYPE" },
259         { HCA_CAP_PORT_ACTIVE_EVENT, "HCA_CAP_PORT_ACTIVE_EVENT" },
260         { HCA_CAP_Q_KEY_VIOL_CTR, "HCA_CAP_Q_KEY_VIOL_CTR" },
261         { HCA_CAP_WQE_RESIZE, "HCA_CAP_WQE_RESIZE" },
262         { HCA_CAP_RAW_PACKET_MCAST, "HCA_CAP_RAW_PACKET_MCAST" },
263         { HCA_CAP_SHUTDOWN_PORT, "HCA_CAP_SHUTDOWN_PORT" },
264         { HCA_CAP_RC_LL_QP, "HCA_CAP_RC_LL_QP" },
265         { HCA_CAP_SRQ, "HCA_CAP_SRQ" },
266         { HCA_CAP_UD_LL_QP, "HCA_CAP_UD_LL_QP" },
267         { HCA_CAP_RESIZE_MR, "HCA_CAP_RESIZE_MR" },
268         { HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" },
269         { HCA_CAP_H_ALLOC_RES_SYNC, "HCA_CAP_H_ALLOC_RES_SYNC" },
270 };
271
272 static int ehca_sense_attributes(struct ehca_shca *shca)
273 {
274         int i, ret = 0;
275         u64 h_ret;
276         struct hipz_query_hca *rblock;
277         struct hipz_query_port *port;
278
279         static const u32 pgsize_map[] = {
280                 HCA_CAP_MR_PGSIZE_4K,  0x1000,
281                 HCA_CAP_MR_PGSIZE_64K, 0x10000,
282                 HCA_CAP_MR_PGSIZE_1M,  0x100000,
283                 HCA_CAP_MR_PGSIZE_16M, 0x1000000,
284         };
285
286         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
287         if (!rblock) {
288                 ehca_gen_err("Cannot allocate rblock memory.");
289                 return -ENOMEM;
290         }
291
292         h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
293         if (h_ret != H_SUCCESS) {
294                 ehca_gen_err("Cannot query device properties. h_ret=%li",
295                              h_ret);
296                 ret = -EPERM;
297                 goto sense_attributes1;
298         }
299
300         if (ehca_nr_ports == 1)
301                 shca->num_ports = 1;
302         else
303                 shca->num_ports = (u8)rblock->num_ports;
304
305         ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
306
307         if (ehca_hw_level == 0) {
308                 u32 hcaaver;
309                 u32 revid;
310
311                 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
312                 revid   = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
313
314                 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
315
316                 if (hcaaver == 1) {
317                         if (revid <= 3)
318                                 shca->hw_level = 0x10 | (revid + 1);
319                         else
320                                 shca->hw_level = 0x14;
321                 } else if (hcaaver == 2) {
322                         if (revid == 0)
323                                 shca->hw_level = 0x21;
324                         else if (revid == 0x10)
325                                 shca->hw_level = 0x22;
326                         else if (revid == 0x20 || revid == 0x21)
327                                 shca->hw_level = 0x23;
328                 }
329
330                 if (!shca->hw_level) {
331                         ehca_gen_warn("unknown hardware version"
332                                       " - assuming default level");
333                         shca->hw_level = 0x22;
334                 }
335         } else
336                 shca->hw_level = ehca_hw_level;
337         ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
338
339         shca->hca_cap = rblock->hca_cap_indicators;
340         ehca_gen_dbg(" ... HCA capabilities:");
341         for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
342                 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
343                         ehca_gen_dbg("   %s", hca_cap_descr[i].descr);
344
345         /* Autodetect hCall locking -- the "H_ALLOC_RESOURCE synced" flag is
346          * a firmware property, so it's valid across all adapters
347          */
348         if (ehca_lock_hcalls == -1)
349                 ehca_lock_hcalls = !(shca->hca_cap & HCA_CAP_H_ALLOC_RES_SYNC);
350
351         /* translate supported MR page sizes; always support 4K */
352         shca->hca_cap_mr_pgsize = EHCA_PAGESIZE;
353         if (ehca_mr_largepage) { /* support extra sizes only if enabled */
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];
357         }
358
359         /* query max MTU from first port -- it's the same for all ports */
360         port = (struct hipz_query_port *)rblock;
361         h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
362         if (h_ret != H_SUCCESS) {
363                 ehca_gen_err("Cannot query port properties. h_ret=%li",
364                              h_ret);
365                 ret = -EPERM;
366                 goto sense_attributes1;
367         }
368
369         shca->max_mtu = port->max_mtu;
370
371 sense_attributes1:
372         ehca_free_fw_ctrlblock(rblock);
373         return ret;
374 }
375
376 static int init_node_guid(struct ehca_shca *shca)
377 {
378         int ret = 0;
379         struct hipz_query_hca *rblock;
380
381         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
382         if (!rblock) {
383                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
384                 return -ENOMEM;
385         }
386
387         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
388                 ehca_err(&shca->ib_device, "Can't query device properties");
389                 ret = -EINVAL;
390                 goto init_node_guid1;
391         }
392
393         memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
394
395 init_node_guid1:
396         ehca_free_fw_ctrlblock(rblock);
397         return ret;
398 }
399
400 static int ehca_init_device(struct ehca_shca *shca)
401 {
402         int ret;
403
404         ret = init_node_guid(shca);
405         if (ret)
406                 return ret;
407
408         strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
409         shca->ib_device.owner               = THIS_MODULE;
410
411         shca->ib_device.uverbs_abi_ver      = 8;
412         shca->ib_device.uverbs_cmd_mask     =
413                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
414                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
415                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
416                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
417                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
418                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
419                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
420                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
421                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
422                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
423                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
424                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
425                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
426                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
427                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
428                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
429
430         shca->ib_device.node_type           = RDMA_NODE_IB_CA;
431         shca->ib_device.phys_port_cnt       = shca->num_ports;
432         shca->ib_device.num_comp_vectors    = 1;
433         shca->ib_device.dma_device          = &shca->ofdev->dev;
434         shca->ib_device.query_device        = ehca_query_device;
435         shca->ib_device.query_port          = ehca_query_port;
436         shca->ib_device.query_gid           = ehca_query_gid;
437         shca->ib_device.query_pkey          = ehca_query_pkey;
438         /* shca->in_device.modify_device    = ehca_modify_device    */
439         shca->ib_device.modify_port         = ehca_modify_port;
440         shca->ib_device.alloc_ucontext      = ehca_alloc_ucontext;
441         shca->ib_device.dealloc_ucontext    = ehca_dealloc_ucontext;
442         shca->ib_device.alloc_pd            = ehca_alloc_pd;
443         shca->ib_device.dealloc_pd          = ehca_dealloc_pd;
444         shca->ib_device.create_ah           = ehca_create_ah;
445         /* shca->ib_device.modify_ah        = ehca_modify_ah;       */
446         shca->ib_device.query_ah            = ehca_query_ah;
447         shca->ib_device.destroy_ah          = ehca_destroy_ah;
448         shca->ib_device.create_qp           = ehca_create_qp;
449         shca->ib_device.modify_qp           = ehca_modify_qp;
450         shca->ib_device.query_qp            = ehca_query_qp;
451         shca->ib_device.destroy_qp          = ehca_destroy_qp;
452         shca->ib_device.post_send           = ehca_post_send;
453         shca->ib_device.post_recv           = ehca_post_recv;
454         shca->ib_device.create_cq           = ehca_create_cq;
455         shca->ib_device.destroy_cq          = ehca_destroy_cq;
456         shca->ib_device.resize_cq           = ehca_resize_cq;
457         shca->ib_device.poll_cq             = ehca_poll_cq;
458         /* shca->ib_device.peek_cq          = ehca_peek_cq;         */
459         shca->ib_device.req_notify_cq       = ehca_req_notify_cq;
460         /* shca->ib_device.req_ncomp_notif  = ehca_req_ncomp_notif; */
461         shca->ib_device.get_dma_mr          = ehca_get_dma_mr;
462         shca->ib_device.reg_phys_mr         = ehca_reg_phys_mr;
463         shca->ib_device.reg_user_mr         = ehca_reg_user_mr;
464         shca->ib_device.query_mr            = ehca_query_mr;
465         shca->ib_device.dereg_mr            = ehca_dereg_mr;
466         shca->ib_device.rereg_phys_mr       = ehca_rereg_phys_mr;
467         shca->ib_device.alloc_mw            = ehca_alloc_mw;
468         shca->ib_device.bind_mw             = ehca_bind_mw;
469         shca->ib_device.dealloc_mw          = ehca_dealloc_mw;
470         shca->ib_device.alloc_fmr           = ehca_alloc_fmr;
471         shca->ib_device.map_phys_fmr        = ehca_map_phys_fmr;
472         shca->ib_device.unmap_fmr           = ehca_unmap_fmr;
473         shca->ib_device.dealloc_fmr         = ehca_dealloc_fmr;
474         shca->ib_device.attach_mcast        = ehca_attach_mcast;
475         shca->ib_device.detach_mcast        = ehca_detach_mcast;
476         shca->ib_device.process_mad         = ehca_process_mad;
477         shca->ib_device.mmap                = ehca_mmap;
478
479         if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
480                 shca->ib_device.uverbs_cmd_mask |=
481                         (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
482                         (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
483                         (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
484                         (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
485
486                 shca->ib_device.create_srq          = ehca_create_srq;
487                 shca->ib_device.modify_srq          = ehca_modify_srq;
488                 shca->ib_device.query_srq           = ehca_query_srq;
489                 shca->ib_device.destroy_srq         = ehca_destroy_srq;
490                 shca->ib_device.post_srq_recv       = ehca_post_srq_recv;
491         }
492
493         return ret;
494 }
495
496 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
497 {
498         struct ehca_sport *sport = &shca->sport[port - 1];
499         struct ib_cq *ibcq;
500         struct ib_qp *ibqp;
501         struct ib_qp_init_attr qp_init_attr;
502         int ret;
503
504         if (sport->ibcq_aqp1) {
505                 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
506                 return -EPERM;
507         }
508
509         ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void *)(-1), 10, 0);
510         if (IS_ERR(ibcq)) {
511                 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
512                 return PTR_ERR(ibcq);
513         }
514         sport->ibcq_aqp1 = ibcq;
515
516         if (sport->ibqp_sqp[IB_QPT_GSI]) {
517                 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
518                 ret = -EPERM;
519                 goto create_aqp1;
520         }
521
522         memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
523         qp_init_attr.send_cq          = ibcq;
524         qp_init_attr.recv_cq          = ibcq;
525         qp_init_attr.sq_sig_type      = IB_SIGNAL_ALL_WR;
526         qp_init_attr.cap.max_send_wr  = 100;
527         qp_init_attr.cap.max_recv_wr  = 100;
528         qp_init_attr.cap.max_send_sge = 2;
529         qp_init_attr.cap.max_recv_sge = 1;
530         qp_init_attr.qp_type          = IB_QPT_GSI;
531         qp_init_attr.port_num         = port;
532         qp_init_attr.qp_context       = NULL;
533         qp_init_attr.event_handler    = NULL;
534         qp_init_attr.srq              = NULL;
535
536         ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
537         if (IS_ERR(ibqp)) {
538                 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
539                 ret = PTR_ERR(ibqp);
540                 goto create_aqp1;
541         }
542         sport->ibqp_sqp[IB_QPT_GSI] = ibqp;
543
544         return 0;
545
546 create_aqp1:
547         ib_destroy_cq(sport->ibcq_aqp1);
548         return ret;
549 }
550
551 static int ehca_destroy_aqp1(struct ehca_sport *sport)
552 {
553         int ret;
554
555         ret = ib_destroy_qp(sport->ibqp_sqp[IB_QPT_GSI]);
556         if (ret) {
557                 ehca_gen_err("Cannot destroy AQP1 QP. ret=%i", ret);
558                 return ret;
559         }
560
561         ret = ib_destroy_cq(sport->ibcq_aqp1);
562         if (ret)
563                 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%i", ret);
564
565         return ret;
566 }
567
568 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
569 {
570         return snprintf(buf, PAGE_SIZE, "%d\n",
571                         ehca_debug_level);
572 }
573
574 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
575                                       const char *buf, size_t count)
576 {
577         int value = (*buf) - '0';
578         if (value >= 0 && value <= 9)
579                 ehca_debug_level = value;
580         return 1;
581 }
582
583 static DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
584                    ehca_show_debug_level, ehca_store_debug_level);
585
586 static struct attribute *ehca_drv_attrs[] = {
587         &driver_attr_debug_level.attr,
588         NULL
589 };
590
591 static struct attribute_group ehca_drv_attr_grp = {
592         .attrs = ehca_drv_attrs
593 };
594
595 static struct attribute_group *ehca_drv_attr_groups[] = {
596         &ehca_drv_attr_grp,
597         NULL,
598 };
599
600 #define EHCA_RESOURCE_ATTR(name)                                           \
601 static ssize_t  ehca_show_##name(struct device *dev,                       \
602                                  struct device_attribute *attr,            \
603                                  char *buf)                                \
604 {                                                                          \
605         struct ehca_shca *shca;                                            \
606         struct hipz_query_hca *rblock;                                     \
607         int data;                                                          \
608                                                                            \
609         shca = dev->driver_data;                                           \
610                                                                            \
611         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);                      \
612         if (!rblock) {                                                     \
613                 dev_err(dev, "Can't allocate rblock memory.\n");           \
614                 return 0;                                                  \
615         }                                                                  \
616                                                                            \
617         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
618                 dev_err(dev, "Can't query device properties\n");           \
619                 ehca_free_fw_ctrlblock(rblock);                            \
620                 return 0;                                                  \
621         }                                                                  \
622                                                                            \
623         data = rblock->name;                                               \
624         ehca_free_fw_ctrlblock(rblock);                                    \
625                                                                            \
626         if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1))     \
627                 return snprintf(buf, 256, "1\n");                          \
628         else                                                               \
629                 return snprintf(buf, 256, "%d\n", data);                   \
630                                                                            \
631 }                                                                          \
632 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
633
634 EHCA_RESOURCE_ATTR(num_ports);
635 EHCA_RESOURCE_ATTR(hw_ver);
636 EHCA_RESOURCE_ATTR(max_eq);
637 EHCA_RESOURCE_ATTR(cur_eq);
638 EHCA_RESOURCE_ATTR(max_cq);
639 EHCA_RESOURCE_ATTR(cur_cq);
640 EHCA_RESOURCE_ATTR(max_qp);
641 EHCA_RESOURCE_ATTR(cur_qp);
642 EHCA_RESOURCE_ATTR(max_mr);
643 EHCA_RESOURCE_ATTR(cur_mr);
644 EHCA_RESOURCE_ATTR(max_mw);
645 EHCA_RESOURCE_ATTR(cur_mw);
646 EHCA_RESOURCE_ATTR(max_pd);
647 EHCA_RESOURCE_ATTR(max_ah);
648
649 static ssize_t ehca_show_adapter_handle(struct device *dev,
650                                         struct device_attribute *attr,
651                                         char *buf)
652 {
653         struct ehca_shca *shca = dev->driver_data;
654
655         return sprintf(buf, "%lx\n", shca->ipz_hca_handle.handle);
656
657 }
658 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
659
660 static ssize_t ehca_show_mr_largepage(struct device *dev,
661                                       struct device_attribute *attr,
662                                       char *buf)
663 {
664         return sprintf(buf, "%d\n", ehca_mr_largepage);
665 }
666 static DEVICE_ATTR(mr_largepage, S_IRUGO, ehca_show_mr_largepage, NULL);
667
668 static struct attribute *ehca_dev_attrs[] = {
669         &dev_attr_adapter_handle.attr,
670         &dev_attr_num_ports.attr,
671         &dev_attr_hw_ver.attr,
672         &dev_attr_max_eq.attr,
673         &dev_attr_cur_eq.attr,
674         &dev_attr_max_cq.attr,
675         &dev_attr_cur_cq.attr,
676         &dev_attr_max_qp.attr,
677         &dev_attr_cur_qp.attr,
678         &dev_attr_max_mr.attr,
679         &dev_attr_cur_mr.attr,
680         &dev_attr_max_mw.attr,
681         &dev_attr_cur_mw.attr,
682         &dev_attr_max_pd.attr,
683         &dev_attr_max_ah.attr,
684         &dev_attr_mr_largepage.attr,
685         NULL
686 };
687
688 static struct attribute_group ehca_dev_attr_grp = {
689         .attrs = ehca_dev_attrs
690 };
691
692 static int __devinit ehca_probe(struct of_device *dev,
693                                 const struct of_device_id *id)
694 {
695         struct ehca_shca *shca;
696         const u64 *handle;
697         struct ib_pd *ibpd;
698         int ret, i;
699
700         handle = of_get_property(dev->node, "ibm,hca-handle", NULL);
701         if (!handle) {
702                 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
703                              dev->node->full_name);
704                 return -ENODEV;
705         }
706
707         if (!(*handle)) {
708                 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
709                              dev->node->full_name);
710                 return -ENODEV;
711         }
712
713         shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
714         if (!shca) {
715                 ehca_gen_err("Cannot allocate shca memory.");
716                 return -ENOMEM;
717         }
718         mutex_init(&shca->modify_mutex);
719         for (i = 0; i < ARRAY_SIZE(shca->sport); i++)
720                 spin_lock_init(&shca->sport[i].mod_sqp_lock);
721
722         shca->ofdev = dev;
723         shca->ipz_hca_handle.handle = *handle;
724         dev->dev.driver_data = shca;
725
726         ret = ehca_sense_attributes(shca);
727         if (ret < 0) {
728                 ehca_gen_err("Cannot sense eHCA attributes.");
729                 goto probe1;
730         }
731
732         ret = ehca_init_device(shca);
733         if (ret) {
734                 ehca_gen_err("Cannot init ehca  device struct");
735                 goto probe1;
736         }
737
738         /* create event queues */
739         ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, 2048);
740         if (ret) {
741                 ehca_err(&shca->ib_device, "Cannot create EQ.");
742                 goto probe1;
743         }
744
745         ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
746         if (ret) {
747                 ehca_err(&shca->ib_device, "Cannot create NEQ.");
748                 goto probe3;
749         }
750
751         /* create internal protection domain */
752         ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL);
753         if (IS_ERR(ibpd)) {
754                 ehca_err(&shca->ib_device, "Cannot create internal PD.");
755                 ret = PTR_ERR(ibpd);
756                 goto probe4;
757         }
758
759         shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
760         shca->pd->ib_pd.device = &shca->ib_device;
761
762         /* create internal max MR */
763         ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
764
765         if (ret) {
766                 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%i",
767                          ret);
768                 goto probe5;
769         }
770
771         ret = ib_register_device(&shca->ib_device);
772         if (ret) {
773                 ehca_err(&shca->ib_device,
774                          "ib_register_device() failed ret=%i", ret);
775                 goto probe6;
776         }
777
778         /* create AQP1 for port 1 */
779         if (ehca_open_aqp1 == 1) {
780                 shca->sport[0].port_state = IB_PORT_DOWN;
781                 ret = ehca_create_aqp1(shca, 1);
782                 if (ret) {
783                         ehca_err(&shca->ib_device,
784                                  "Cannot create AQP1 for port 1.");
785                         goto probe7;
786                 }
787         }
788
789         /* create AQP1 for port 2 */
790         if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
791                 shca->sport[1].port_state = IB_PORT_DOWN;
792                 ret = ehca_create_aqp1(shca, 2);
793                 if (ret) {
794                         ehca_err(&shca->ib_device,
795                                  "Cannot create AQP1 for port 2.");
796                         goto probe8;
797                 }
798         }
799
800         ret = sysfs_create_group(&dev->dev.kobj, &ehca_dev_attr_grp);
801         if (ret) /* only complain; we can live without attributes */
802                 ehca_err(&shca->ib_device,
803                          "Cannot create device attributes  ret=%d", ret);
804
805         spin_lock(&shca_list_lock);
806         list_add(&shca->shca_list, &shca_list);
807         spin_unlock(&shca_list_lock);
808
809         return 0;
810
811 probe8:
812         ret = ehca_destroy_aqp1(&shca->sport[0]);
813         if (ret)
814                 ehca_err(&shca->ib_device,
815                          "Cannot destroy AQP1 for port 1. ret=%i", ret);
816
817 probe7:
818         ib_unregister_device(&shca->ib_device);
819
820 probe6:
821         ret = ehca_dereg_internal_maxmr(shca);
822         if (ret)
823                 ehca_err(&shca->ib_device,
824                          "Cannot destroy internal MR. ret=%x", ret);
825
826 probe5:
827         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
828         if (ret)
829                 ehca_err(&shca->ib_device,
830                          "Cannot destroy internal PD. ret=%x", ret);
831
832 probe4:
833         ret = ehca_destroy_eq(shca, &shca->neq);
834         if (ret)
835                 ehca_err(&shca->ib_device,
836                          "Cannot destroy NEQ. ret=%x", ret);
837
838 probe3:
839         ret = ehca_destroy_eq(shca, &shca->eq);
840         if (ret)
841                 ehca_err(&shca->ib_device,
842                          "Cannot destroy EQ. ret=%x", ret);
843
844 probe1:
845         ib_dealloc_device(&shca->ib_device);
846
847         return -EINVAL;
848 }
849
850 static int __devexit ehca_remove(struct of_device *dev)
851 {
852         struct ehca_shca *shca = dev->dev.driver_data;
853         int ret;
854
855         sysfs_remove_group(&dev->dev.kobj, &ehca_dev_attr_grp);
856
857         if (ehca_open_aqp1 == 1) {
858                 int i;
859                 for (i = 0; i < shca->num_ports; i++) {
860                         ret = ehca_destroy_aqp1(&shca->sport[i]);
861                         if (ret)
862                                 ehca_err(&shca->ib_device,
863                                          "Cannot destroy AQP1 for port %x "
864                                          "ret=%i", ret, i);
865                 }
866         }
867
868         ib_unregister_device(&shca->ib_device);
869
870         ret = ehca_dereg_internal_maxmr(shca);
871         if (ret)
872                 ehca_err(&shca->ib_device,
873                          "Cannot destroy internal MR. ret=%i", ret);
874
875         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
876         if (ret)
877                 ehca_err(&shca->ib_device,
878                          "Cannot destroy internal PD. ret=%i", ret);
879
880         ret = ehca_destroy_eq(shca, &shca->eq);
881         if (ret)
882                 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%i", ret);
883
884         ret = ehca_destroy_eq(shca, &shca->neq);
885         if (ret)
886                 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%i", ret);
887
888         ib_dealloc_device(&shca->ib_device);
889
890         spin_lock(&shca_list_lock);
891         list_del(&shca->shca_list);
892         spin_unlock(&shca_list_lock);
893
894         return ret;
895 }
896
897 static struct of_device_id ehca_device_table[] =
898 {
899         {
900                 .name       = "lhca",
901                 .compatible = "IBM,lhca",
902         },
903         {},
904 };
905
906 static struct of_platform_driver ehca_driver = {
907         .name        = "ehca",
908         .match_table = ehca_device_table,
909         .probe       = ehca_probe,
910         .remove      = ehca_remove,
911         .driver      = {
912                 .groups = ehca_drv_attr_groups,
913         },
914 };
915
916 void ehca_poll_eqs(unsigned long data)
917 {
918         struct ehca_shca *shca;
919
920         spin_lock(&shca_list_lock);
921         list_for_each_entry(shca, &shca_list, shca_list) {
922                 if (shca->eq.is_initialized) {
923                         /* call deadman proc only if eq ptr does not change */
924                         struct ehca_eq *eq = &shca->eq;
925                         int max = 3;
926                         volatile u64 q_ofs, q_ofs2;
927                         u64 flags;
928                         spin_lock_irqsave(&eq->spinlock, flags);
929                         q_ofs = eq->ipz_queue.current_q_offset;
930                         spin_unlock_irqrestore(&eq->spinlock, flags);
931                         do {
932                                 spin_lock_irqsave(&eq->spinlock, flags);
933                                 q_ofs2 = eq->ipz_queue.current_q_offset;
934                                 spin_unlock_irqrestore(&eq->spinlock, flags);
935                                 max--;
936                         } while (q_ofs == q_ofs2 && max > 0);
937                         if (q_ofs == q_ofs2)
938                                 ehca_process_eq(shca, 0);
939                 }
940         }
941         mod_timer(&poll_eqs_timer, round_jiffies(jiffies + HZ));
942         spin_unlock(&shca_list_lock);
943 }
944
945 static int __init ehca_module_init(void)
946 {
947         int ret;
948
949         printk(KERN_INFO "eHCA Infiniband Device Driver "
950                "(Version " HCAD_VERSION ")\n");
951
952         ret = ehca_create_comp_pool();
953         if (ret) {
954                 ehca_gen_err("Cannot create comp pool.");
955                 return ret;
956         }
957
958         ret = ehca_create_slab_caches();
959         if (ret) {
960                 ehca_gen_err("Cannot create SLAB caches");
961                 ret = -ENOMEM;
962                 goto module_init1;
963         }
964
965         ret = ibmebus_register_driver(&ehca_driver);
966         if (ret) {
967                 ehca_gen_err("Cannot register eHCA device driver");
968                 ret = -EINVAL;
969                 goto module_init2;
970         }
971
972         if (ehca_poll_all_eqs != 1) {
973                 ehca_gen_err("WARNING!!!");
974                 ehca_gen_err("It is possible to lose interrupts.");
975         } else {
976                 init_timer(&poll_eqs_timer);
977                 poll_eqs_timer.function = ehca_poll_eqs;
978                 poll_eqs_timer.expires = jiffies + HZ;
979                 add_timer(&poll_eqs_timer);
980         }
981
982         return 0;
983
984 module_init2:
985         ehca_destroy_slab_caches();
986
987 module_init1:
988         ehca_destroy_comp_pool();
989         return ret;
990 };
991
992 static void __exit ehca_module_exit(void)
993 {
994         if (ehca_poll_all_eqs == 1)
995                 del_timer_sync(&poll_eqs_timer);
996
997         ibmebus_unregister_driver(&ehca_driver);
998
999         ehca_destroy_slab_caches();
1000
1001         ehca_destroy_comp_pool();
1002
1003         idr_destroy(&ehca_cq_idr);
1004         idr_destroy(&ehca_qp_idr);
1005 };
1006
1007 module_init(ehca_module_init);
1008 module_exit(ehca_module_exit);