Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
[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
47 #include <linux/notifier.h>
48 #include <linux/memory.h>
49 #include "ehca_classes.h"
50 #include "ehca_iverbs.h"
51 #include "ehca_mrmw.h"
52 #include "ehca_tools.h"
53 #include "hcp_if.h"
54
55 #define HCAD_VERSION "0029"
56
57 MODULE_LICENSE("Dual BSD/GPL");
58 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
59 MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver");
60 MODULE_VERSION(HCAD_VERSION);
61
62 static int ehca_open_aqp1     = 0;
63 static int ehca_hw_level      = 0;
64 static int ehca_poll_all_eqs  = 1;
65
66 int ehca_debug_level   = 0;
67 int ehca_nr_ports      = -1;
68 int ehca_use_hp_mr     = 0;
69 int ehca_port_act_time = 30;
70 int ehca_static_rate   = -1;
71 int ehca_scaling_code  = 0;
72 int ehca_lock_hcalls   = -1;
73 int ehca_max_cq        = -1;
74 int ehca_max_qp        = -1;
75
76 module_param_named(open_aqp1,     ehca_open_aqp1,     bool, S_IRUGO);
77 module_param_named(debug_level,   ehca_debug_level,   int,  S_IRUGO);
78 module_param_named(hw_level,      ehca_hw_level,      int,  S_IRUGO);
79 module_param_named(nr_ports,      ehca_nr_ports,      int,  S_IRUGO);
80 module_param_named(use_hp_mr,     ehca_use_hp_mr,     bool, S_IRUGO);
81 module_param_named(port_act_time, ehca_port_act_time, int,  S_IRUGO);
82 module_param_named(poll_all_eqs,  ehca_poll_all_eqs,  bool, S_IRUGO);
83 module_param_named(static_rate,   ehca_static_rate,   int,  S_IRUGO);
84 module_param_named(scaling_code,  ehca_scaling_code,  bool, S_IRUGO);
85 module_param_named(lock_hcalls,   ehca_lock_hcalls,   bool, S_IRUGO);
86 module_param_named(number_of_cqs, ehca_max_cq,        int,  S_IRUGO);
87 module_param_named(number_of_qps, ehca_max_qp,        int,  S_IRUGO);
88
89 MODULE_PARM_DESC(open_aqp1,
90                  "Open AQP1 on startup (default: no)");
91 MODULE_PARM_DESC(debug_level,
92                  "Amount of debug output (0: none (default), 1: traces, "
93                  "2: some dumps, 3: lots)");
94 MODULE_PARM_DESC(hw_level,
95                  "Hardware level (0: autosensing (default), "
96                  "0x10..0x14: eHCA, 0x20..0x23: eHCA2)");
97 MODULE_PARM_DESC(nr_ports,
98                  "number of connected ports (-1: autodetect (default), "
99                  "1: port one only, 2: two ports)");
100 MODULE_PARM_DESC(use_hp_mr,
101                  "Use high performance MRs (default: no)");
102 MODULE_PARM_DESC(port_act_time,
103                  "Time to wait for port activation (default: 30 sec)");
104 MODULE_PARM_DESC(poll_all_eqs,
105                  "Poll all event queues periodically (default: yes)");
106 MODULE_PARM_DESC(static_rate,
107                  "Set permanent static rate (default: no static rate)");
108 MODULE_PARM_DESC(scaling_code,
109                  "Enable scaling code (default: no)");
110 MODULE_PARM_DESC(lock_hcalls,
111                  "Serialize all hCalls made by the driver "
112                  "(default: autodetect)");
113 MODULE_PARM_DESC(number_of_cqs,
114                 "Max number of CQs which can be allocated "
115                 "(default: autodetect)");
116 MODULE_PARM_DESC(number_of_qps,
117                 "Max number of QPs which can be allocated "
118                 "(default: autodetect)");
119
120 DEFINE_RWLOCK(ehca_qp_idr_lock);
121 DEFINE_RWLOCK(ehca_cq_idr_lock);
122 DEFINE_IDR(ehca_qp_idr);
123 DEFINE_IDR(ehca_cq_idr);
124
125 static LIST_HEAD(shca_list); /* list of all registered ehcas */
126 DEFINE_SPINLOCK(shca_list_lock);
127
128 static struct timer_list poll_eqs_timer;
129
130 #ifdef CONFIG_PPC_64K_PAGES
131 static struct kmem_cache *ctblk_cache;
132
133 void *ehca_alloc_fw_ctrlblock(gfp_t flags)
134 {
135         void *ret = kmem_cache_zalloc(ctblk_cache, flags);
136         if (!ret)
137                 ehca_gen_err("Out of memory for ctblk");
138         return ret;
139 }
140
141 void ehca_free_fw_ctrlblock(void *ptr)
142 {
143         if (ptr)
144                 kmem_cache_free(ctblk_cache, ptr);
145
146 }
147 #endif
148
149 int ehca2ib_return_code(u64 ehca_rc)
150 {
151         switch (ehca_rc) {
152         case H_SUCCESS:
153                 return 0;
154         case H_RESOURCE:             /* Resource in use */
155         case H_BUSY:
156                 return -EBUSY;
157         case H_NOT_ENOUGH_RESOURCES: /* insufficient resources */
158         case H_CONSTRAINED:          /* resource constraint */
159         case H_NO_MEM:
160                 return -ENOMEM;
161         default:
162                 return -EINVAL;
163         }
164 }
165
166 static int ehca_create_slab_caches(void)
167 {
168         int ret;
169
170         ret = ehca_init_pd_cache();
171         if (ret) {
172                 ehca_gen_err("Cannot create PD SLAB cache.");
173                 return ret;
174         }
175
176         ret = ehca_init_cq_cache();
177         if (ret) {
178                 ehca_gen_err("Cannot create CQ SLAB cache.");
179                 goto create_slab_caches2;
180         }
181
182         ret = ehca_init_qp_cache();
183         if (ret) {
184                 ehca_gen_err("Cannot create QP SLAB cache.");
185                 goto create_slab_caches3;
186         }
187
188         ret = ehca_init_av_cache();
189         if (ret) {
190                 ehca_gen_err("Cannot create AV SLAB cache.");
191                 goto create_slab_caches4;
192         }
193
194         ret = ehca_init_mrmw_cache();
195         if (ret) {
196                 ehca_gen_err("Cannot create MR&MW SLAB cache.");
197                 goto create_slab_caches5;
198         }
199
200         ret = ehca_init_small_qp_cache();
201         if (ret) {
202                 ehca_gen_err("Cannot create small queue SLAB cache.");
203                 goto create_slab_caches6;
204         }
205
206 #ifdef CONFIG_PPC_64K_PAGES
207         ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
208                                         EHCA_PAGESIZE, H_CB_ALIGNMENT,
209                                         SLAB_HWCACHE_ALIGN,
210                                         NULL);
211         if (!ctblk_cache) {
212                 ehca_gen_err("Cannot create ctblk SLAB cache.");
213                 ehca_cleanup_small_qp_cache();
214                 goto create_slab_caches6;
215         }
216 #endif
217         return 0;
218
219 create_slab_caches6:
220         ehca_cleanup_mrmw_cache();
221
222 create_slab_caches5:
223         ehca_cleanup_av_cache();
224
225 create_slab_caches4:
226         ehca_cleanup_qp_cache();
227
228 create_slab_caches3:
229         ehca_cleanup_cq_cache();
230
231 create_slab_caches2:
232         ehca_cleanup_pd_cache();
233
234         return ret;
235 }
236
237 static void ehca_destroy_slab_caches(void)
238 {
239         ehca_cleanup_small_qp_cache();
240         ehca_cleanup_mrmw_cache();
241         ehca_cleanup_av_cache();
242         ehca_cleanup_qp_cache();
243         ehca_cleanup_cq_cache();
244         ehca_cleanup_pd_cache();
245 #ifdef CONFIG_PPC_64K_PAGES
246         if (ctblk_cache)
247                 kmem_cache_destroy(ctblk_cache);
248 #endif
249 }
250
251 #define EHCA_HCAAVER  EHCA_BMASK_IBM(32, 39)
252 #define EHCA_REVID    EHCA_BMASK_IBM(40, 63)
253
254 static struct cap_descr {
255         u64 mask;
256         char *descr;
257 } hca_cap_descr[] = {
258         { HCA_CAP_AH_PORT_NR_CHECK, "HCA_CAP_AH_PORT_NR_CHECK" },
259         { HCA_CAP_ATOMIC, "HCA_CAP_ATOMIC" },
260         { HCA_CAP_AUTO_PATH_MIG, "HCA_CAP_AUTO_PATH_MIG" },
261         { HCA_CAP_BAD_P_KEY_CTR, "HCA_CAP_BAD_P_KEY_CTR" },
262         { HCA_CAP_SQD_RTS_PORT_CHANGE, "HCA_CAP_SQD_RTS_PORT_CHANGE" },
263         { HCA_CAP_CUR_QP_STATE_MOD, "HCA_CAP_CUR_QP_STATE_MOD" },
264         { HCA_CAP_INIT_TYPE, "HCA_CAP_INIT_TYPE" },
265         { HCA_CAP_PORT_ACTIVE_EVENT, "HCA_CAP_PORT_ACTIVE_EVENT" },
266         { HCA_CAP_Q_KEY_VIOL_CTR, "HCA_CAP_Q_KEY_VIOL_CTR" },
267         { HCA_CAP_WQE_RESIZE, "HCA_CAP_WQE_RESIZE" },
268         { HCA_CAP_RAW_PACKET_MCAST, "HCA_CAP_RAW_PACKET_MCAST" },
269         { HCA_CAP_SHUTDOWN_PORT, "HCA_CAP_SHUTDOWN_PORT" },
270         { HCA_CAP_RC_LL_QP, "HCA_CAP_RC_LL_QP" },
271         { HCA_CAP_SRQ, "HCA_CAP_SRQ" },
272         { HCA_CAP_UD_LL_QP, "HCA_CAP_UD_LL_QP" },
273         { HCA_CAP_RESIZE_MR, "HCA_CAP_RESIZE_MR" },
274         { HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" },
275         { HCA_CAP_H_ALLOC_RES_SYNC, "HCA_CAP_H_ALLOC_RES_SYNC" },
276 };
277
278 static int ehca_sense_attributes(struct ehca_shca *shca)
279 {
280         int i, ret = 0;
281         u64 h_ret;
282         struct hipz_query_hca *rblock;
283         struct hipz_query_port *port;
284         const char *loc_code;
285
286         static const u32 pgsize_map[] = {
287                 HCA_CAP_MR_PGSIZE_4K,  0x1000,
288                 HCA_CAP_MR_PGSIZE_64K, 0x10000,
289                 HCA_CAP_MR_PGSIZE_1M,  0x100000,
290                 HCA_CAP_MR_PGSIZE_16M, 0x1000000,
291         };
292
293         ehca_gen_dbg("Probing adapter %s...",
294                      shca->ofdev->node->full_name);
295         loc_code = of_get_property(shca->ofdev->node, "ibm,loc-code", NULL);
296         if (loc_code)
297                 ehca_gen_dbg(" ... location lode=%s", loc_code);
298
299         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
300         if (!rblock) {
301                 ehca_gen_err("Cannot allocate rblock memory.");
302                 return -ENOMEM;
303         }
304
305         h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
306         if (h_ret != H_SUCCESS) {
307                 ehca_gen_err("Cannot query device properties. h_ret=%lli",
308                              h_ret);
309                 ret = -EPERM;
310                 goto sense_attributes1;
311         }
312
313         if (ehca_nr_ports == 1)
314                 shca->num_ports = 1;
315         else
316                 shca->num_ports = (u8)rblock->num_ports;
317
318         ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
319
320         if (ehca_hw_level == 0) {
321                 u32 hcaaver;
322                 u32 revid;
323
324                 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
325                 revid   = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
326
327                 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
328
329                 if (hcaaver == 1) {
330                         if (revid <= 3)
331                                 shca->hw_level = 0x10 | (revid + 1);
332                         else
333                                 shca->hw_level = 0x14;
334                 } else if (hcaaver == 2) {
335                         if (revid == 0)
336                                 shca->hw_level = 0x21;
337                         else if (revid == 0x10)
338                                 shca->hw_level = 0x22;
339                         else if (revid == 0x20 || revid == 0x21)
340                                 shca->hw_level = 0x23;
341                 }
342
343                 if (!shca->hw_level) {
344                         ehca_gen_warn("unknown hardware version"
345                                       " - assuming default level");
346                         shca->hw_level = 0x22;
347                 }
348         } else
349                 shca->hw_level = ehca_hw_level;
350         ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
351
352         shca->hca_cap = rblock->hca_cap_indicators;
353         ehca_gen_dbg(" ... HCA capabilities:");
354         for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
355                 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
356                         ehca_gen_dbg("   %s", hca_cap_descr[i].descr);
357
358         /* Autodetect hCall locking -- the "H_ALLOC_RESOURCE synced" flag is
359          * a firmware property, so it's valid across all adapters
360          */
361         if (ehca_lock_hcalls == -1)
362                 ehca_lock_hcalls = !(shca->hca_cap & HCA_CAP_H_ALLOC_RES_SYNC);
363
364         /* translate supported MR page sizes; always support 4K */
365         shca->hca_cap_mr_pgsize = EHCA_PAGESIZE;
366         for (i = 0; i < ARRAY_SIZE(pgsize_map); i += 2)
367                 if (rblock->memory_page_size_supported & pgsize_map[i])
368                         shca->hca_cap_mr_pgsize |= pgsize_map[i + 1];
369
370         /* Set maximum number of CQs and QPs to calculate EQ size */
371         if (shca->max_num_qps == -1)
372                 shca->max_num_qps = min_t(int, rblock->max_qp,
373                                           EHCA_MAX_NUM_QUEUES);
374         else if (shca->max_num_qps < 1 || shca->max_num_qps > rblock->max_qp) {
375                 ehca_gen_warn("The requested number of QPs is out of range "
376                               "(1 - %i) specified by HW. Value is set to %i",
377                               rblock->max_qp, rblock->max_qp);
378                 shca->max_num_qps = rblock->max_qp;
379         }
380
381         if (shca->max_num_cqs == -1)
382                 shca->max_num_cqs = min_t(int, rblock->max_cq,
383                                           EHCA_MAX_NUM_QUEUES);
384         else if (shca->max_num_cqs < 1 || shca->max_num_cqs > rblock->max_cq) {
385                 ehca_gen_warn("The requested number of CQs is out of range "
386                               "(1 - %i) specified by HW. Value is set to %i",
387                               rblock->max_cq, rblock->max_cq);
388         }
389
390         /* query max MTU from first port -- it's the same for all ports */
391         port = (struct hipz_query_port *)rblock;
392         h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
393         if (h_ret != H_SUCCESS) {
394                 ehca_gen_err("Cannot query port properties. h_ret=%lli",
395                              h_ret);
396                 ret = -EPERM;
397                 goto sense_attributes1;
398         }
399
400         shca->max_mtu = port->max_mtu;
401
402 sense_attributes1:
403         ehca_free_fw_ctrlblock(rblock);
404         return ret;
405 }
406
407 static int init_node_guid(struct ehca_shca *shca)
408 {
409         int ret = 0;
410         struct hipz_query_hca *rblock;
411
412         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
413         if (!rblock) {
414                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
415                 return -ENOMEM;
416         }
417
418         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
419                 ehca_err(&shca->ib_device, "Can't query device properties");
420                 ret = -EINVAL;
421                 goto init_node_guid1;
422         }
423
424         memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
425
426 init_node_guid1:
427         ehca_free_fw_ctrlblock(rblock);
428         return ret;
429 }
430
431 static int ehca_init_device(struct ehca_shca *shca)
432 {
433         int ret;
434
435         ret = init_node_guid(shca);
436         if (ret)
437                 return ret;
438
439         strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
440         shca->ib_device.owner               = THIS_MODULE;
441
442         shca->ib_device.uverbs_abi_ver      = 8;
443         shca->ib_device.uverbs_cmd_mask     =
444                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
445                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
446                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
447                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
448                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
449                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
450                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
451                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
452                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
453                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
454                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
455                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
456                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
457                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
458                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
459                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
460
461         shca->ib_device.node_type           = RDMA_NODE_IB_CA;
462         shca->ib_device.phys_port_cnt       = shca->num_ports;
463         shca->ib_device.num_comp_vectors    = 1;
464         shca->ib_device.dma_device          = &shca->ofdev->dev;
465         shca->ib_device.query_device        = ehca_query_device;
466         shca->ib_device.query_port          = ehca_query_port;
467         shca->ib_device.query_gid           = ehca_query_gid;
468         shca->ib_device.query_pkey          = ehca_query_pkey;
469         /* shca->in_device.modify_device    = ehca_modify_device    */
470         shca->ib_device.modify_port         = ehca_modify_port;
471         shca->ib_device.alloc_ucontext      = ehca_alloc_ucontext;
472         shca->ib_device.dealloc_ucontext    = ehca_dealloc_ucontext;
473         shca->ib_device.alloc_pd            = ehca_alloc_pd;
474         shca->ib_device.dealloc_pd          = ehca_dealloc_pd;
475         shca->ib_device.create_ah           = ehca_create_ah;
476         /* shca->ib_device.modify_ah        = ehca_modify_ah;       */
477         shca->ib_device.query_ah            = ehca_query_ah;
478         shca->ib_device.destroy_ah          = ehca_destroy_ah;
479         shca->ib_device.create_qp           = ehca_create_qp;
480         shca->ib_device.modify_qp           = ehca_modify_qp;
481         shca->ib_device.query_qp            = ehca_query_qp;
482         shca->ib_device.destroy_qp          = ehca_destroy_qp;
483         shca->ib_device.post_send           = ehca_post_send;
484         shca->ib_device.post_recv           = ehca_post_recv;
485         shca->ib_device.create_cq           = ehca_create_cq;
486         shca->ib_device.destroy_cq          = ehca_destroy_cq;
487         shca->ib_device.resize_cq           = ehca_resize_cq;
488         shca->ib_device.poll_cq             = ehca_poll_cq;
489         /* shca->ib_device.peek_cq          = ehca_peek_cq;         */
490         shca->ib_device.req_notify_cq       = ehca_req_notify_cq;
491         /* shca->ib_device.req_ncomp_notif  = ehca_req_ncomp_notif; */
492         shca->ib_device.get_dma_mr          = ehca_get_dma_mr;
493         shca->ib_device.reg_phys_mr         = ehca_reg_phys_mr;
494         shca->ib_device.reg_user_mr         = ehca_reg_user_mr;
495         shca->ib_device.query_mr            = ehca_query_mr;
496         shca->ib_device.dereg_mr            = ehca_dereg_mr;
497         shca->ib_device.rereg_phys_mr       = ehca_rereg_phys_mr;
498         shca->ib_device.alloc_mw            = ehca_alloc_mw;
499         shca->ib_device.bind_mw             = ehca_bind_mw;
500         shca->ib_device.dealloc_mw          = ehca_dealloc_mw;
501         shca->ib_device.alloc_fmr           = ehca_alloc_fmr;
502         shca->ib_device.map_phys_fmr        = ehca_map_phys_fmr;
503         shca->ib_device.unmap_fmr           = ehca_unmap_fmr;
504         shca->ib_device.dealloc_fmr         = ehca_dealloc_fmr;
505         shca->ib_device.attach_mcast        = ehca_attach_mcast;
506         shca->ib_device.detach_mcast        = ehca_detach_mcast;
507         shca->ib_device.process_mad         = ehca_process_mad;
508         shca->ib_device.mmap                = ehca_mmap;
509         shca->ib_device.dma_ops             = &ehca_dma_mapping_ops;
510
511         if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
512                 shca->ib_device.uverbs_cmd_mask |=
513                         (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
514                         (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
515                         (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
516                         (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
517
518                 shca->ib_device.create_srq          = ehca_create_srq;
519                 shca->ib_device.modify_srq          = ehca_modify_srq;
520                 shca->ib_device.query_srq           = ehca_query_srq;
521                 shca->ib_device.destroy_srq         = ehca_destroy_srq;
522                 shca->ib_device.post_srq_recv       = ehca_post_srq_recv;
523         }
524
525         return ret;
526 }
527
528 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
529 {
530         struct ehca_sport *sport = &shca->sport[port - 1];
531         struct ib_cq *ibcq;
532         struct ib_qp *ibqp;
533         struct ib_qp_init_attr qp_init_attr;
534         int ret;
535
536         if (sport->ibcq_aqp1) {
537                 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
538                 return -EPERM;
539         }
540
541         ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void *)(-1), 10, 0);
542         if (IS_ERR(ibcq)) {
543                 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
544                 return PTR_ERR(ibcq);
545         }
546         sport->ibcq_aqp1 = ibcq;
547
548         if (sport->ibqp_sqp[IB_QPT_GSI]) {
549                 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
550                 ret = -EPERM;
551                 goto create_aqp1;
552         }
553
554         memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
555         qp_init_attr.send_cq          = ibcq;
556         qp_init_attr.recv_cq          = ibcq;
557         qp_init_attr.sq_sig_type      = IB_SIGNAL_ALL_WR;
558         qp_init_attr.cap.max_send_wr  = 100;
559         qp_init_attr.cap.max_recv_wr  = 100;
560         qp_init_attr.cap.max_send_sge = 2;
561         qp_init_attr.cap.max_recv_sge = 1;
562         qp_init_attr.qp_type          = IB_QPT_GSI;
563         qp_init_attr.port_num         = port;
564         qp_init_attr.qp_context       = NULL;
565         qp_init_attr.event_handler    = NULL;
566         qp_init_attr.srq              = NULL;
567
568         ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
569         if (IS_ERR(ibqp)) {
570                 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
571                 ret = PTR_ERR(ibqp);
572                 goto create_aqp1;
573         }
574         sport->ibqp_sqp[IB_QPT_GSI] = ibqp;
575
576         return 0;
577
578 create_aqp1:
579         ib_destroy_cq(sport->ibcq_aqp1);
580         return ret;
581 }
582
583 static int ehca_destroy_aqp1(struct ehca_sport *sport)
584 {
585         int ret;
586
587         ret = ib_destroy_qp(sport->ibqp_sqp[IB_QPT_GSI]);
588         if (ret) {
589                 ehca_gen_err("Cannot destroy AQP1 QP. ret=%i", ret);
590                 return ret;
591         }
592
593         ret = ib_destroy_cq(sport->ibcq_aqp1);
594         if (ret)
595                 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%i", ret);
596
597         return ret;
598 }
599
600 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
601 {
602         return snprintf(buf, PAGE_SIZE, "%d\n", ehca_debug_level);
603 }
604
605 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
606                                       const char *buf, size_t count)
607 {
608         int value = (*buf) - '0';
609         if (value >= 0 && value <= 9)
610                 ehca_debug_level = value;
611         return 1;
612 }
613
614 static DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
615                    ehca_show_debug_level, ehca_store_debug_level);
616
617 static struct attribute *ehca_drv_attrs[] = {
618         &driver_attr_debug_level.attr,
619         NULL
620 };
621
622 static struct attribute_group ehca_drv_attr_grp = {
623         .attrs = ehca_drv_attrs
624 };
625
626 static const struct attribute_group *ehca_drv_attr_groups[] = {
627         &ehca_drv_attr_grp,
628         NULL,
629 };
630
631 #define EHCA_RESOURCE_ATTR(name)                                           \
632 static ssize_t  ehca_show_##name(struct device *dev,                       \
633                                  struct device_attribute *attr,            \
634                                  char *buf)                                \
635 {                                                                          \
636         struct ehca_shca *shca;                                            \
637         struct hipz_query_hca *rblock;                                     \
638         int data;                                                          \
639                                                                            \
640         shca = dev_get_drvdata(dev);                                       \
641                                                                            \
642         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);                      \
643         if (!rblock) {                                                     \
644                 dev_err(dev, "Can't allocate rblock memory.\n");           \
645                 return 0;                                                  \
646         }                                                                  \
647                                                                            \
648         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
649                 dev_err(dev, "Can't query device properties\n");           \
650                 ehca_free_fw_ctrlblock(rblock);                            \
651                 return 0;                                                  \
652         }                                                                  \
653                                                                            \
654         data = rblock->name;                                               \
655         ehca_free_fw_ctrlblock(rblock);                                    \
656                                                                            \
657         if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1))     \
658                 return snprintf(buf, 256, "1\n");                          \
659         else                                                               \
660                 return snprintf(buf, 256, "%d\n", data);                   \
661                                                                            \
662 }                                                                          \
663 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
664
665 EHCA_RESOURCE_ATTR(num_ports);
666 EHCA_RESOURCE_ATTR(hw_ver);
667 EHCA_RESOURCE_ATTR(max_eq);
668 EHCA_RESOURCE_ATTR(cur_eq);
669 EHCA_RESOURCE_ATTR(max_cq);
670 EHCA_RESOURCE_ATTR(cur_cq);
671 EHCA_RESOURCE_ATTR(max_qp);
672 EHCA_RESOURCE_ATTR(cur_qp);
673 EHCA_RESOURCE_ATTR(max_mr);
674 EHCA_RESOURCE_ATTR(cur_mr);
675 EHCA_RESOURCE_ATTR(max_mw);
676 EHCA_RESOURCE_ATTR(cur_mw);
677 EHCA_RESOURCE_ATTR(max_pd);
678 EHCA_RESOURCE_ATTR(max_ah);
679
680 static ssize_t ehca_show_adapter_handle(struct device *dev,
681                                         struct device_attribute *attr,
682                                         char *buf)
683 {
684         struct ehca_shca *shca = dev_get_drvdata(dev);
685
686         return sprintf(buf, "%llx\n", shca->ipz_hca_handle.handle);
687
688 }
689 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
690
691 static struct attribute *ehca_dev_attrs[] = {
692         &dev_attr_adapter_handle.attr,
693         &dev_attr_num_ports.attr,
694         &dev_attr_hw_ver.attr,
695         &dev_attr_max_eq.attr,
696         &dev_attr_cur_eq.attr,
697         &dev_attr_max_cq.attr,
698         &dev_attr_cur_cq.attr,
699         &dev_attr_max_qp.attr,
700         &dev_attr_cur_qp.attr,
701         &dev_attr_max_mr.attr,
702         &dev_attr_cur_mr.attr,
703         &dev_attr_max_mw.attr,
704         &dev_attr_cur_mw.attr,
705         &dev_attr_max_pd.attr,
706         &dev_attr_max_ah.attr,
707         NULL
708 };
709
710 static struct attribute_group ehca_dev_attr_grp = {
711         .attrs = ehca_dev_attrs
712 };
713
714 static int __devinit ehca_probe(struct of_device *dev,
715                                 const struct of_device_id *id)
716 {
717         struct ehca_shca *shca;
718         const u64 *handle;
719         struct ib_pd *ibpd;
720         int ret, i, eq_size;
721         unsigned long flags;
722
723         handle = of_get_property(dev->node, "ibm,hca-handle", NULL);
724         if (!handle) {
725                 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
726                              dev->node->full_name);
727                 return -ENODEV;
728         }
729
730         if (!(*handle)) {
731                 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
732                              dev->node->full_name);
733                 return -ENODEV;
734         }
735
736         shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
737         if (!shca) {
738                 ehca_gen_err("Cannot allocate shca memory.");
739                 return -ENOMEM;
740         }
741
742         mutex_init(&shca->modify_mutex);
743         atomic_set(&shca->num_cqs, 0);
744         atomic_set(&shca->num_qps, 0);
745         shca->max_num_qps = ehca_max_qp;
746         shca->max_num_cqs = ehca_max_cq;
747
748         for (i = 0; i < ARRAY_SIZE(shca->sport); i++)
749                 spin_lock_init(&shca->sport[i].mod_sqp_lock);
750
751         shca->ofdev = dev;
752         shca->ipz_hca_handle.handle = *handle;
753         dev_set_drvdata(&dev->dev, shca);
754
755         ret = ehca_sense_attributes(shca);
756         if (ret < 0) {
757                 ehca_gen_err("Cannot sense eHCA attributes.");
758                 goto probe1;
759         }
760
761         ret = ehca_init_device(shca);
762         if (ret) {
763                 ehca_gen_err("Cannot init ehca  device struct");
764                 goto probe1;
765         }
766
767         eq_size = 2 * shca->max_num_cqs + 4 * shca->max_num_qps;
768         /* create event queues */
769         ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, eq_size);
770         if (ret) {
771                 ehca_err(&shca->ib_device, "Cannot create EQ.");
772                 goto probe1;
773         }
774
775         ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
776         if (ret) {
777                 ehca_err(&shca->ib_device, "Cannot create NEQ.");
778                 goto probe3;
779         }
780
781         /* create internal protection domain */
782         ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL);
783         if (IS_ERR(ibpd)) {
784                 ehca_err(&shca->ib_device, "Cannot create internal PD.");
785                 ret = PTR_ERR(ibpd);
786                 goto probe4;
787         }
788
789         shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
790         shca->pd->ib_pd.device = &shca->ib_device;
791
792         /* create internal max MR */
793         ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
794
795         if (ret) {
796                 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%i",
797                          ret);
798                 goto probe5;
799         }
800
801         ret = ib_register_device(&shca->ib_device);
802         if (ret) {
803                 ehca_err(&shca->ib_device,
804                          "ib_register_device() failed ret=%i", ret);
805                 goto probe6;
806         }
807
808         /* create AQP1 for port 1 */
809         if (ehca_open_aqp1 == 1) {
810                 shca->sport[0].port_state = IB_PORT_DOWN;
811                 ret = ehca_create_aqp1(shca, 1);
812                 if (ret) {
813                         ehca_err(&shca->ib_device,
814                                  "Cannot create AQP1 for port 1.");
815                         goto probe7;
816                 }
817         }
818
819         /* create AQP1 for port 2 */
820         if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
821                 shca->sport[1].port_state = IB_PORT_DOWN;
822                 ret = ehca_create_aqp1(shca, 2);
823                 if (ret) {
824                         ehca_err(&shca->ib_device,
825                                  "Cannot create AQP1 for port 2.");
826                         goto probe8;
827                 }
828         }
829
830         ret = sysfs_create_group(&dev->dev.kobj, &ehca_dev_attr_grp);
831         if (ret) /* only complain; we can live without attributes */
832                 ehca_err(&shca->ib_device,
833                          "Cannot create device attributes  ret=%d", ret);
834
835         spin_lock_irqsave(&shca_list_lock, flags);
836         list_add(&shca->shca_list, &shca_list);
837         spin_unlock_irqrestore(&shca_list_lock, flags);
838
839         return 0;
840
841 probe8:
842         ret = ehca_destroy_aqp1(&shca->sport[0]);
843         if (ret)
844                 ehca_err(&shca->ib_device,
845                          "Cannot destroy AQP1 for port 1. ret=%i", ret);
846
847 probe7:
848         ib_unregister_device(&shca->ib_device);
849
850 probe6:
851         ret = ehca_dereg_internal_maxmr(shca);
852         if (ret)
853                 ehca_err(&shca->ib_device,
854                          "Cannot destroy internal MR. ret=%x", ret);
855
856 probe5:
857         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
858         if (ret)
859                 ehca_err(&shca->ib_device,
860                          "Cannot destroy internal PD. ret=%x", ret);
861
862 probe4:
863         ret = ehca_destroy_eq(shca, &shca->neq);
864         if (ret)
865                 ehca_err(&shca->ib_device,
866                          "Cannot destroy NEQ. ret=%x", ret);
867
868 probe3:
869         ret = ehca_destroy_eq(shca, &shca->eq);
870         if (ret)
871                 ehca_err(&shca->ib_device,
872                          "Cannot destroy EQ. ret=%x", ret);
873
874 probe1:
875         ib_dealloc_device(&shca->ib_device);
876
877         return -EINVAL;
878 }
879
880 static int __devexit ehca_remove(struct of_device *dev)
881 {
882         struct ehca_shca *shca = dev_get_drvdata(&dev->dev);
883         unsigned long flags;
884         int ret;
885
886         sysfs_remove_group(&dev->dev.kobj, &ehca_dev_attr_grp);
887
888         if (ehca_open_aqp1 == 1) {
889                 int i;
890                 for (i = 0; i < shca->num_ports; i++) {
891                         ret = ehca_destroy_aqp1(&shca->sport[i]);
892                         if (ret)
893                                 ehca_err(&shca->ib_device,
894                                          "Cannot destroy AQP1 for port %x "
895                                          "ret=%i", ret, i);
896                 }
897         }
898
899         ib_unregister_device(&shca->ib_device);
900
901         ret = ehca_dereg_internal_maxmr(shca);
902         if (ret)
903                 ehca_err(&shca->ib_device,
904                          "Cannot destroy internal MR. ret=%i", ret);
905
906         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
907         if (ret)
908                 ehca_err(&shca->ib_device,
909                          "Cannot destroy internal PD. ret=%i", ret);
910
911         ret = ehca_destroy_eq(shca, &shca->eq);
912         if (ret)
913                 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%i", ret);
914
915         ret = ehca_destroy_eq(shca, &shca->neq);
916         if (ret)
917                 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%i", ret);
918
919         ib_dealloc_device(&shca->ib_device);
920
921         spin_lock_irqsave(&shca_list_lock, flags);
922         list_del(&shca->shca_list);
923         spin_unlock_irqrestore(&shca_list_lock, flags);
924
925         return ret;
926 }
927
928 static struct of_device_id ehca_device_table[] =
929 {
930         {
931                 .name       = "lhca",
932                 .compatible = "IBM,lhca",
933         },
934         {},
935 };
936 MODULE_DEVICE_TABLE(of, ehca_device_table);
937
938 static struct of_platform_driver ehca_driver = {
939         .name        = "ehca",
940         .match_table = ehca_device_table,
941         .probe       = ehca_probe,
942         .remove      = ehca_remove,
943         .driver      = {
944                 .groups = ehca_drv_attr_groups,
945         },
946 };
947
948 void ehca_poll_eqs(unsigned long data)
949 {
950         struct ehca_shca *shca;
951
952         spin_lock(&shca_list_lock);
953         list_for_each_entry(shca, &shca_list, shca_list) {
954                 if (shca->eq.is_initialized) {
955                         /* call deadman proc only if eq ptr does not change */
956                         struct ehca_eq *eq = &shca->eq;
957                         int max = 3;
958                         volatile u64 q_ofs, q_ofs2;
959                         unsigned long flags;
960                         spin_lock_irqsave(&eq->spinlock, flags);
961                         q_ofs = eq->ipz_queue.current_q_offset;
962                         spin_unlock_irqrestore(&eq->spinlock, flags);
963                         do {
964                                 spin_lock_irqsave(&eq->spinlock, flags);
965                                 q_ofs2 = eq->ipz_queue.current_q_offset;
966                                 spin_unlock_irqrestore(&eq->spinlock, flags);
967                                 max--;
968                         } while (q_ofs == q_ofs2 && max > 0);
969                         if (q_ofs == q_ofs2)
970                                 ehca_process_eq(shca, 0);
971                 }
972         }
973         mod_timer(&poll_eqs_timer, round_jiffies(jiffies + HZ));
974         spin_unlock(&shca_list_lock);
975 }
976
977 static int ehca_mem_notifier(struct notifier_block *nb,
978                              unsigned long action, void *data)
979 {
980         static unsigned long ehca_dmem_warn_time;
981         unsigned long flags;
982
983         switch (action) {
984         case MEM_CANCEL_OFFLINE:
985         case MEM_CANCEL_ONLINE:
986         case MEM_ONLINE:
987         case MEM_OFFLINE:
988                 return NOTIFY_OK;
989         case MEM_GOING_ONLINE:
990         case MEM_GOING_OFFLINE:
991                 /* only ok if no hca is attached to the lpar */
992                 spin_lock_irqsave(&shca_list_lock, flags);
993                 if (list_empty(&shca_list)) {
994                         spin_unlock_irqrestore(&shca_list_lock, flags);
995                         return NOTIFY_OK;
996                 } else {
997                         spin_unlock_irqrestore(&shca_list_lock, flags);
998                         if (printk_timed_ratelimit(&ehca_dmem_warn_time,
999                                                    30 * 1000))
1000                                 ehca_gen_err("DMEM operations are not allowed"
1001                                              "in conjunction with eHCA");
1002                         return NOTIFY_BAD;
1003                 }
1004         }
1005         return NOTIFY_OK;
1006 }
1007
1008 static struct notifier_block ehca_mem_nb = {
1009         .notifier_call = ehca_mem_notifier,
1010 };
1011
1012 static int __init ehca_module_init(void)
1013 {
1014         int ret;
1015
1016         printk(KERN_INFO "eHCA Infiniband Device Driver "
1017                "(Version " HCAD_VERSION ")\n");
1018
1019         ret = ehca_create_comp_pool();
1020         if (ret) {
1021                 ehca_gen_err("Cannot create comp pool.");
1022                 return ret;
1023         }
1024
1025         ret = ehca_create_slab_caches();
1026         if (ret) {
1027                 ehca_gen_err("Cannot create SLAB caches");
1028                 ret = -ENOMEM;
1029                 goto module_init1;
1030         }
1031
1032         ret = ehca_create_busmap();
1033         if (ret) {
1034                 ehca_gen_err("Cannot create busmap.");
1035                 goto module_init2;
1036         }
1037
1038         ret = ibmebus_register_driver(&ehca_driver);
1039         if (ret) {
1040                 ehca_gen_err("Cannot register eHCA device driver");
1041                 ret = -EINVAL;
1042                 goto module_init3;
1043         }
1044
1045         ret = register_memory_notifier(&ehca_mem_nb);
1046         if (ret) {
1047                 ehca_gen_err("Failed registering memory add/remove notifier");
1048                 goto module_init4;
1049         }
1050
1051         if (ehca_poll_all_eqs != 1) {
1052                 ehca_gen_err("WARNING!!!");
1053                 ehca_gen_err("It is possible to lose interrupts.");
1054         } else {
1055                 init_timer(&poll_eqs_timer);
1056                 poll_eqs_timer.function = ehca_poll_eqs;
1057                 poll_eqs_timer.expires = jiffies + HZ;
1058                 add_timer(&poll_eqs_timer);
1059         }
1060
1061         return 0;
1062
1063 module_init4:
1064         ibmebus_unregister_driver(&ehca_driver);
1065
1066 module_init3:
1067         ehca_destroy_busmap();
1068
1069 module_init2:
1070         ehca_destroy_slab_caches();
1071
1072 module_init1:
1073         ehca_destroy_comp_pool();
1074         return ret;
1075 };
1076
1077 static void __exit ehca_module_exit(void)
1078 {
1079         if (ehca_poll_all_eqs == 1)
1080                 del_timer_sync(&poll_eqs_timer);
1081
1082         ibmebus_unregister_driver(&ehca_driver);
1083
1084         unregister_memory_notifier(&ehca_mem_nb);
1085
1086         ehca_destroy_busmap();
1087
1088         ehca_destroy_slab_caches();
1089
1090         ehca_destroy_comp_pool();
1091
1092         idr_destroy(&ehca_cq_idr);
1093         idr_destroy(&ehca_qp_idr);
1094 };
1095
1096 module_init(ehca_module_init);
1097 module_exit(ehca_module_exit);