a3409fdb307c88d3de45e37c633bd66a3910c797
[linux-3.10.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 #define HCAD_VERSION "0024"
53
54 MODULE_LICENSE("Dual BSD/GPL");
55 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
56 MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver");
57 MODULE_VERSION(HCAD_VERSION);
58
59 int ehca_open_aqp1     = 0;
60 int ehca_debug_level   = 0;
61 int ehca_hw_level      = 0;
62 int ehca_nr_ports      = 2;
63 int ehca_use_hp_mr     = 0;
64 int ehca_port_act_time = 30;
65 int ehca_poll_all_eqs  = 1;
66 int ehca_static_rate   = -1;
67 int ehca_scaling_code  = 0;
68 int ehca_mr_largepage  = 0;
69
70 module_param_named(open_aqp1,     ehca_open_aqp1,     int, S_IRUGO);
71 module_param_named(debug_level,   ehca_debug_level,   int, S_IRUGO);
72 module_param_named(hw_level,      ehca_hw_level,      int, S_IRUGO);
73 module_param_named(nr_ports,      ehca_nr_ports,      int, S_IRUGO);
74 module_param_named(use_hp_mr,     ehca_use_hp_mr,     int, S_IRUGO);
75 module_param_named(port_act_time, ehca_port_act_time, int, S_IRUGO);
76 module_param_named(poll_all_eqs,  ehca_poll_all_eqs,  int, S_IRUGO);
77 module_param_named(static_rate,   ehca_static_rate,   int, S_IRUGO);
78 module_param_named(scaling_code,  ehca_scaling_code,  int, S_IRUGO);
79 module_param_named(mr_largepage,  ehca_mr_largepage,  int, S_IRUGO);
80
81 MODULE_PARM_DESC(open_aqp1,
82                  "AQP1 on startup (0: no (default), 1: yes)");
83 MODULE_PARM_DESC(debug_level,
84                  "debug level"
85                  " (0: no debug traces (default), 1: with debug traces)");
86 MODULE_PARM_DESC(hw_level,
87                  "hardware level"
88                  " (0: autosensing (default), 1: v. 0.20, 2: v. 0.21)");
89 MODULE_PARM_DESC(nr_ports,
90                  "number of connected ports (default: 2)");
91 MODULE_PARM_DESC(use_hp_mr,
92                  "high performance MRs (0: no (default), 1: yes)");
93 MODULE_PARM_DESC(port_act_time,
94                  "time to wait for port activation (default: 30 sec)");
95 MODULE_PARM_DESC(poll_all_eqs,
96                  "polls all event queues periodically"
97                  " (0: no, 1: yes (default))");
98 MODULE_PARM_DESC(static_rate,
99                  "set permanent static rate (default: disabled)");
100 MODULE_PARM_DESC(scaling_code,
101                  "set scaling code (0: disabled/default, 1: enabled)");
102 MODULE_PARM_DESC(mr_largepage,
103                  "use large page for MR (0: use PAGE_SIZE (default), "
104                  "1: use large page depending on MR size");
105
106 DEFINE_RWLOCK(ehca_qp_idr_lock);
107 DEFINE_RWLOCK(ehca_cq_idr_lock);
108 DEFINE_IDR(ehca_qp_idr);
109 DEFINE_IDR(ehca_cq_idr);
110
111 static LIST_HEAD(shca_list); /* list of all registered ehcas */
112 static DEFINE_SPINLOCK(shca_list_lock);
113
114 static struct timer_list poll_eqs_timer;
115
116 #ifdef CONFIG_PPC_64K_PAGES
117 static struct kmem_cache *ctblk_cache;
118
119 void *ehca_alloc_fw_ctrlblock(gfp_t flags)
120 {
121         void *ret = kmem_cache_zalloc(ctblk_cache, flags);
122         if (!ret)
123                 ehca_gen_err("Out of memory for ctblk");
124         return ret;
125 }
126
127 void ehca_free_fw_ctrlblock(void *ptr)
128 {
129         if (ptr)
130                 kmem_cache_free(ctblk_cache, ptr);
131
132 }
133 #endif
134
135 int ehca2ib_return_code(u64 ehca_rc)
136 {
137         switch (ehca_rc) {
138         case H_SUCCESS:
139                 return 0;
140         case H_RESOURCE:             /* Resource in use */
141         case H_BUSY:
142                 return -EBUSY;
143         case H_NOT_ENOUGH_RESOURCES: /* insufficient resources */
144         case H_CONSTRAINED:          /* resource constraint */
145         case H_NO_MEM:
146                 return -ENOMEM;
147         default:
148                 return -EINVAL;
149         }
150 }
151
152 static int ehca_create_slab_caches(void)
153 {
154         int ret;
155
156         ret = ehca_init_pd_cache();
157         if (ret) {
158                 ehca_gen_err("Cannot create PD SLAB cache.");
159                 return ret;
160         }
161
162         ret = ehca_init_cq_cache();
163         if (ret) {
164                 ehca_gen_err("Cannot create CQ SLAB cache.");
165                 goto create_slab_caches2;
166         }
167
168         ret = ehca_init_qp_cache();
169         if (ret) {
170                 ehca_gen_err("Cannot create QP SLAB cache.");
171                 goto create_slab_caches3;
172         }
173
174         ret = ehca_init_av_cache();
175         if (ret) {
176                 ehca_gen_err("Cannot create AV SLAB cache.");
177                 goto create_slab_caches4;
178         }
179
180         ret = ehca_init_mrmw_cache();
181         if (ret) {
182                 ehca_gen_err("Cannot create MR&MW SLAB cache.");
183                 goto create_slab_caches5;
184         }
185
186         ret = ehca_init_small_qp_cache();
187         if (ret) {
188                 ehca_gen_err("Cannot create small queue SLAB cache.");
189                 goto create_slab_caches6;
190         }
191
192 #ifdef CONFIG_PPC_64K_PAGES
193         ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
194                                         EHCA_PAGESIZE, H_CB_ALIGNMENT,
195                                         SLAB_HWCACHE_ALIGN,
196                                         NULL);
197         if (!ctblk_cache) {
198                 ehca_gen_err("Cannot create ctblk SLAB cache.");
199                 ehca_cleanup_small_qp_cache();
200                 goto create_slab_caches6;
201         }
202 #endif
203         return 0;
204
205 create_slab_caches6:
206         ehca_cleanup_mrmw_cache();
207
208 create_slab_caches5:
209         ehca_cleanup_av_cache();
210
211 create_slab_caches4:
212         ehca_cleanup_qp_cache();
213
214 create_slab_caches3:
215         ehca_cleanup_cq_cache();
216
217 create_slab_caches2:
218         ehca_cleanup_pd_cache();
219
220         return ret;
221 }
222
223 static void ehca_destroy_slab_caches(void)
224 {
225         ehca_cleanup_small_qp_cache();
226         ehca_cleanup_mrmw_cache();
227         ehca_cleanup_av_cache();
228         ehca_cleanup_qp_cache();
229         ehca_cleanup_cq_cache();
230         ehca_cleanup_pd_cache();
231 #ifdef CONFIG_PPC_64K_PAGES
232         if (ctblk_cache)
233                 kmem_cache_destroy(ctblk_cache);
234 #endif
235 }
236
237 #define EHCA_HCAAVER  EHCA_BMASK_IBM(32, 39)
238 #define EHCA_REVID    EHCA_BMASK_IBM(40, 63)
239
240 static struct cap_descr {
241         u64 mask;
242         char *descr;
243 } hca_cap_descr[] = {
244         { HCA_CAP_AH_PORT_NR_CHECK, "HCA_CAP_AH_PORT_NR_CHECK" },
245         { HCA_CAP_ATOMIC, "HCA_CAP_ATOMIC" },
246         { HCA_CAP_AUTO_PATH_MIG, "HCA_CAP_AUTO_PATH_MIG" },
247         { HCA_CAP_BAD_P_KEY_CTR, "HCA_CAP_BAD_P_KEY_CTR" },
248         { HCA_CAP_SQD_RTS_PORT_CHANGE, "HCA_CAP_SQD_RTS_PORT_CHANGE" },
249         { HCA_CAP_CUR_QP_STATE_MOD, "HCA_CAP_CUR_QP_STATE_MOD" },
250         { HCA_CAP_INIT_TYPE, "HCA_CAP_INIT_TYPE" },
251         { HCA_CAP_PORT_ACTIVE_EVENT, "HCA_CAP_PORT_ACTIVE_EVENT" },
252         { HCA_CAP_Q_KEY_VIOL_CTR, "HCA_CAP_Q_KEY_VIOL_CTR" },
253         { HCA_CAP_WQE_RESIZE, "HCA_CAP_WQE_RESIZE" },
254         { HCA_CAP_RAW_PACKET_MCAST, "HCA_CAP_RAW_PACKET_MCAST" },
255         { HCA_CAP_SHUTDOWN_PORT, "HCA_CAP_SHUTDOWN_PORT" },
256         { HCA_CAP_RC_LL_QP, "HCA_CAP_RC_LL_QP" },
257         { HCA_CAP_SRQ, "HCA_CAP_SRQ" },
258         { HCA_CAP_UD_LL_QP, "HCA_CAP_UD_LL_QP" },
259         { HCA_CAP_RESIZE_MR, "HCA_CAP_RESIZE_MR" },
260         { HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" },
261 };
262
263 int ehca_sense_attributes(struct ehca_shca *shca)
264 {
265         int i, ret = 0;
266         u64 h_ret;
267         struct hipz_query_hca *rblock;
268         struct hipz_query_port *port;
269
270         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
271         if (!rblock) {
272                 ehca_gen_err("Cannot allocate rblock memory.");
273                 return -ENOMEM;
274         }
275
276         h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
277         if (h_ret != H_SUCCESS) {
278                 ehca_gen_err("Cannot query device properties. h_ret=%li",
279                              h_ret);
280                 ret = -EPERM;
281                 goto sense_attributes1;
282         }
283
284         if (ehca_nr_ports == 1)
285                 shca->num_ports = 1;
286         else
287                 shca->num_ports = (u8)rblock->num_ports;
288
289         ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
290
291         if (ehca_hw_level == 0) {
292                 u32 hcaaver;
293                 u32 revid;
294
295                 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
296                 revid   = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
297
298                 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
299
300                 if (hcaaver == 1) {
301                         if (revid <= 3)
302                                 shca->hw_level = 0x10 | (revid + 1);
303                         else
304                                 shca->hw_level = 0x14;
305                 } else if (hcaaver == 2) {
306                         if (revid == 0)
307                                 shca->hw_level = 0x21;
308                         else if (revid == 0x10)
309                                 shca->hw_level = 0x22;
310                         else if (revid == 0x20 || revid == 0x21)
311                                 shca->hw_level = 0x23;
312                 }
313
314                 if (!shca->hw_level) {
315                         ehca_gen_warn("unknown hardware version"
316                                       " - assuming default level");
317                         shca->hw_level = 0x22;
318                 }
319         } else
320                 shca->hw_level = ehca_hw_level;
321         ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
322
323         shca->sport[0].rate = IB_RATE_30_GBPS;
324         shca->sport[1].rate = IB_RATE_30_GBPS;
325
326         shca->hca_cap = rblock->hca_cap_indicators;
327         ehca_gen_dbg(" ... HCA capabilities:");
328         for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
329                 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
330                         ehca_gen_dbg("   %s", hca_cap_descr[i].descr);
331
332         shca->hca_cap_mr_pgsize = rblock->memory_page_size_supported;
333
334         port = (struct hipz_query_port *)rblock;
335         h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
336         if (h_ret != H_SUCCESS) {
337                 ehca_gen_err("Cannot query port properties. h_ret=%li",
338                              h_ret);
339                 ret = -EPERM;
340                 goto sense_attributes1;
341         }
342
343         shca->max_mtu = port->max_mtu;
344
345 sense_attributes1:
346         ehca_free_fw_ctrlblock(rblock);
347         return ret;
348 }
349
350 static int init_node_guid(struct ehca_shca *shca)
351 {
352         int ret = 0;
353         struct hipz_query_hca *rblock;
354
355         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
356         if (!rblock) {
357                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
358                 return -ENOMEM;
359         }
360
361         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
362                 ehca_err(&shca->ib_device, "Can't query device properties");
363                 ret = -EINVAL;
364                 goto init_node_guid1;
365         }
366
367         memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
368
369 init_node_guid1:
370         ehca_free_fw_ctrlblock(rblock);
371         return ret;
372 }
373
374 int ehca_init_device(struct ehca_shca *shca)
375 {
376         int ret;
377
378         ret = init_node_guid(shca);
379         if (ret)
380                 return ret;
381
382         strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
383         shca->ib_device.owner               = THIS_MODULE;
384
385         shca->ib_device.uverbs_abi_ver      = 8;
386         shca->ib_device.uverbs_cmd_mask     =
387                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
388                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
389                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
390                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
391                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
392                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
393                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
394                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
395                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
396                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
397                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
398                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
399                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
400                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
401                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
402                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
403
404         shca->ib_device.node_type           = RDMA_NODE_IB_CA;
405         shca->ib_device.phys_port_cnt       = shca->num_ports;
406         shca->ib_device.num_comp_vectors    = 1;
407         shca->ib_device.dma_device          = &shca->ofdev->dev;
408         shca->ib_device.query_device        = ehca_query_device;
409         shca->ib_device.query_port          = ehca_query_port;
410         shca->ib_device.query_gid           = ehca_query_gid;
411         shca->ib_device.query_pkey          = ehca_query_pkey;
412         /* shca->in_device.modify_device    = ehca_modify_device    */
413         shca->ib_device.modify_port         = ehca_modify_port;
414         shca->ib_device.alloc_ucontext      = ehca_alloc_ucontext;
415         shca->ib_device.dealloc_ucontext    = ehca_dealloc_ucontext;
416         shca->ib_device.alloc_pd            = ehca_alloc_pd;
417         shca->ib_device.dealloc_pd          = ehca_dealloc_pd;
418         shca->ib_device.create_ah           = ehca_create_ah;
419         /* shca->ib_device.modify_ah        = ehca_modify_ah;       */
420         shca->ib_device.query_ah            = ehca_query_ah;
421         shca->ib_device.destroy_ah          = ehca_destroy_ah;
422         shca->ib_device.create_qp           = ehca_create_qp;
423         shca->ib_device.modify_qp           = ehca_modify_qp;
424         shca->ib_device.query_qp            = ehca_query_qp;
425         shca->ib_device.destroy_qp          = ehca_destroy_qp;
426         shca->ib_device.post_send           = ehca_post_send;
427         shca->ib_device.post_recv           = ehca_post_recv;
428         shca->ib_device.create_cq           = ehca_create_cq;
429         shca->ib_device.destroy_cq          = ehca_destroy_cq;
430         shca->ib_device.resize_cq           = ehca_resize_cq;
431         shca->ib_device.poll_cq             = ehca_poll_cq;
432         /* shca->ib_device.peek_cq          = ehca_peek_cq;         */
433         shca->ib_device.req_notify_cq       = ehca_req_notify_cq;
434         /* shca->ib_device.req_ncomp_notif  = ehca_req_ncomp_notif; */
435         shca->ib_device.get_dma_mr          = ehca_get_dma_mr;
436         shca->ib_device.reg_phys_mr         = ehca_reg_phys_mr;
437         shca->ib_device.reg_user_mr         = ehca_reg_user_mr;
438         shca->ib_device.query_mr            = ehca_query_mr;
439         shca->ib_device.dereg_mr            = ehca_dereg_mr;
440         shca->ib_device.rereg_phys_mr       = ehca_rereg_phys_mr;
441         shca->ib_device.alloc_mw            = ehca_alloc_mw;
442         shca->ib_device.bind_mw             = ehca_bind_mw;
443         shca->ib_device.dealloc_mw          = ehca_dealloc_mw;
444         shca->ib_device.alloc_fmr           = ehca_alloc_fmr;
445         shca->ib_device.map_phys_fmr        = ehca_map_phys_fmr;
446         shca->ib_device.unmap_fmr           = ehca_unmap_fmr;
447         shca->ib_device.dealloc_fmr         = ehca_dealloc_fmr;
448         shca->ib_device.attach_mcast        = ehca_attach_mcast;
449         shca->ib_device.detach_mcast        = ehca_detach_mcast;
450         /* shca->ib_device.process_mad      = ehca_process_mad;     */
451         shca->ib_device.mmap                = ehca_mmap;
452
453         if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
454                 shca->ib_device.uverbs_cmd_mask |=
455                         (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
456                         (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
457                         (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
458                         (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
459
460                 shca->ib_device.create_srq          = ehca_create_srq;
461                 shca->ib_device.modify_srq          = ehca_modify_srq;
462                 shca->ib_device.query_srq           = ehca_query_srq;
463                 shca->ib_device.destroy_srq         = ehca_destroy_srq;
464                 shca->ib_device.post_srq_recv       = ehca_post_srq_recv;
465         }
466
467         return ret;
468 }
469
470 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
471 {
472         struct ehca_sport *sport = &shca->sport[port - 1];
473         struct ib_cq *ibcq;
474         struct ib_qp *ibqp;
475         struct ib_qp_init_attr qp_init_attr;
476         int ret;
477
478         if (sport->ibcq_aqp1) {
479                 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
480                 return -EPERM;
481         }
482
483         ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void *)(-1), 10, 0);
484         if (IS_ERR(ibcq)) {
485                 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
486                 return PTR_ERR(ibcq);
487         }
488         sport->ibcq_aqp1 = ibcq;
489
490         if (sport->ibqp_aqp1) {
491                 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
492                 ret = -EPERM;
493                 goto create_aqp1;
494         }
495
496         memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
497         qp_init_attr.send_cq          = ibcq;
498         qp_init_attr.recv_cq          = ibcq;
499         qp_init_attr.sq_sig_type      = IB_SIGNAL_ALL_WR;
500         qp_init_attr.cap.max_send_wr  = 100;
501         qp_init_attr.cap.max_recv_wr  = 100;
502         qp_init_attr.cap.max_send_sge = 2;
503         qp_init_attr.cap.max_recv_sge = 1;
504         qp_init_attr.qp_type          = IB_QPT_GSI;
505         qp_init_attr.port_num         = port;
506         qp_init_attr.qp_context       = NULL;
507         qp_init_attr.event_handler    = NULL;
508         qp_init_attr.srq              = NULL;
509
510         ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
511         if (IS_ERR(ibqp)) {
512                 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
513                 ret = PTR_ERR(ibqp);
514                 goto create_aqp1;
515         }
516         sport->ibqp_aqp1 = ibqp;
517
518         return 0;
519
520 create_aqp1:
521         ib_destroy_cq(sport->ibcq_aqp1);
522         return ret;
523 }
524
525 static int ehca_destroy_aqp1(struct ehca_sport *sport)
526 {
527         int ret;
528
529         ret = ib_destroy_qp(sport->ibqp_aqp1);
530         if (ret) {
531                 ehca_gen_err("Cannot destroy AQP1 QP. ret=%i", ret);
532                 return ret;
533         }
534
535         ret = ib_destroy_cq(sport->ibcq_aqp1);
536         if (ret)
537                 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%i", ret);
538
539         return ret;
540 }
541
542 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
543 {
544         return snprintf(buf, PAGE_SIZE, "%d\n",
545                         ehca_debug_level);
546 }
547
548 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
549                                       const char *buf, size_t count)
550 {
551         int value = (*buf) - '0';
552         if (value >= 0 && value <= 9)
553                 ehca_debug_level = value;
554         return 1;
555 }
556
557 DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
558             ehca_show_debug_level, ehca_store_debug_level);
559
560 static struct attribute *ehca_drv_attrs[] = {
561         &driver_attr_debug_level.attr,
562         NULL
563 };
564
565 static struct attribute_group ehca_drv_attr_grp = {
566         .attrs = ehca_drv_attrs
567 };
568
569 #define EHCA_RESOURCE_ATTR(name)                                           \
570 static ssize_t  ehca_show_##name(struct device *dev,                       \
571                                  struct device_attribute *attr,            \
572                                  char *buf)                                \
573 {                                                                          \
574         struct ehca_shca *shca;                                            \
575         struct hipz_query_hca *rblock;                                     \
576         int data;                                                          \
577                                                                            \
578         shca = dev->driver_data;                                           \
579                                                                            \
580         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);                      \
581         if (!rblock) {                                                     \
582                 dev_err(dev, "Can't allocate rblock memory.");             \
583                 return 0;                                                  \
584         }                                                                  \
585                                                                            \
586         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
587                 dev_err(dev, "Can't query device properties");             \
588                 ehca_free_fw_ctrlblock(rblock);                            \
589                 return 0;                                                  \
590         }                                                                  \
591                                                                            \
592         data = rblock->name;                                               \
593         ehca_free_fw_ctrlblock(rblock);                                    \
594                                                                            \
595         if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1))     \
596                 return snprintf(buf, 256, "1\n");                          \
597         else                                                               \
598                 return snprintf(buf, 256, "%d\n", data);                   \
599                                                                            \
600 }                                                                          \
601 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
602
603 EHCA_RESOURCE_ATTR(num_ports);
604 EHCA_RESOURCE_ATTR(hw_ver);
605 EHCA_RESOURCE_ATTR(max_eq);
606 EHCA_RESOURCE_ATTR(cur_eq);
607 EHCA_RESOURCE_ATTR(max_cq);
608 EHCA_RESOURCE_ATTR(cur_cq);
609 EHCA_RESOURCE_ATTR(max_qp);
610 EHCA_RESOURCE_ATTR(cur_qp);
611 EHCA_RESOURCE_ATTR(max_mr);
612 EHCA_RESOURCE_ATTR(cur_mr);
613 EHCA_RESOURCE_ATTR(max_mw);
614 EHCA_RESOURCE_ATTR(cur_mw);
615 EHCA_RESOURCE_ATTR(max_pd);
616 EHCA_RESOURCE_ATTR(max_ah);
617
618 static ssize_t ehca_show_adapter_handle(struct device *dev,
619                                         struct device_attribute *attr,
620                                         char *buf)
621 {
622         struct ehca_shca *shca = dev->driver_data;
623
624         return sprintf(buf, "%lx\n", shca->ipz_hca_handle.handle);
625
626 }
627 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
628
629 static ssize_t ehca_show_mr_largepage(struct device *dev,
630                                       struct device_attribute *attr,
631                                       char *buf)
632 {
633         return sprintf(buf, "%d\n", ehca_mr_largepage);
634 }
635 static DEVICE_ATTR(mr_largepage, S_IRUGO, ehca_show_mr_largepage, NULL);
636
637 static struct attribute *ehca_dev_attrs[] = {
638         &dev_attr_adapter_handle.attr,
639         &dev_attr_num_ports.attr,
640         &dev_attr_hw_ver.attr,
641         &dev_attr_max_eq.attr,
642         &dev_attr_cur_eq.attr,
643         &dev_attr_max_cq.attr,
644         &dev_attr_cur_cq.attr,
645         &dev_attr_max_qp.attr,
646         &dev_attr_cur_qp.attr,
647         &dev_attr_max_mr.attr,
648         &dev_attr_cur_mr.attr,
649         &dev_attr_max_mw.attr,
650         &dev_attr_cur_mw.attr,
651         &dev_attr_max_pd.attr,
652         &dev_attr_max_ah.attr,
653         &dev_attr_mr_largepage.attr,
654         NULL
655 };
656
657 static struct attribute_group ehca_dev_attr_grp = {
658         .attrs = ehca_dev_attrs
659 };
660
661 static int __devinit ehca_probe(struct of_device *dev,
662                                 const struct of_device_id *id)
663 {
664         struct ehca_shca *shca;
665         const u64 *handle;
666         struct ib_pd *ibpd;
667         int ret;
668
669         handle = of_get_property(dev->node, "ibm,hca-handle", NULL);
670         if (!handle) {
671                 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
672                              dev->node->full_name);
673                 return -ENODEV;
674         }
675
676         if (!(*handle)) {
677                 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
678                              dev->node->full_name);
679                 return -ENODEV;
680         }
681
682         shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
683         if (!shca) {
684                 ehca_gen_err("Cannot allocate shca memory.");
685                 return -ENOMEM;
686         }
687         mutex_init(&shca->modify_mutex);
688
689         shca->ofdev = dev;
690         shca->ipz_hca_handle.handle = *handle;
691         dev->dev.driver_data = shca;
692
693         ret = ehca_sense_attributes(shca);
694         if (ret < 0) {
695                 ehca_gen_err("Cannot sense eHCA attributes.");
696                 goto probe1;
697         }
698
699         ret = ehca_init_device(shca);
700         if (ret) {
701                 ehca_gen_err("Cannot init ehca  device struct");
702                 goto probe1;
703         }
704
705         /* create event queues */
706         ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, 2048);
707         if (ret) {
708                 ehca_err(&shca->ib_device, "Cannot create EQ.");
709                 goto probe1;
710         }
711
712         ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
713         if (ret) {
714                 ehca_err(&shca->ib_device, "Cannot create NEQ.");
715                 goto probe3;
716         }
717
718         /* create internal protection domain */
719         ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL);
720         if (IS_ERR(ibpd)) {
721                 ehca_err(&shca->ib_device, "Cannot create internal PD.");
722                 ret = PTR_ERR(ibpd);
723                 goto probe4;
724         }
725
726         shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
727         shca->pd->ib_pd.device = &shca->ib_device;
728
729         /* create internal max MR */
730         ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
731
732         if (ret) {
733                 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%i",
734                          ret);
735                 goto probe5;
736         }
737
738         ret = ib_register_device(&shca->ib_device);
739         if (ret) {
740                 ehca_err(&shca->ib_device,
741                          "ib_register_device() failed ret=%i", ret);
742                 goto probe6;
743         }
744
745         /* create AQP1 for port 1 */
746         if (ehca_open_aqp1 == 1) {
747                 shca->sport[0].port_state = IB_PORT_DOWN;
748                 ret = ehca_create_aqp1(shca, 1);
749                 if (ret) {
750                         ehca_err(&shca->ib_device,
751                                  "Cannot create AQP1 for port 1.");
752                         goto probe7;
753                 }
754         }
755
756         /* create AQP1 for port 2 */
757         if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
758                 shca->sport[1].port_state = IB_PORT_DOWN;
759                 ret = ehca_create_aqp1(shca, 2);
760                 if (ret) {
761                         ehca_err(&shca->ib_device,
762                                  "Cannot create AQP1 for port 2.");
763                         goto probe8;
764                 }
765         }
766
767         ret = sysfs_create_group(&dev->dev.kobj, &ehca_dev_attr_grp);
768         if (ret) /* only complain; we can live without attributes */
769                 ehca_err(&shca->ib_device,
770                          "Cannot create device attributes  ret=%d", ret);
771
772         spin_lock(&shca_list_lock);
773         list_add(&shca->shca_list, &shca_list);
774         spin_unlock(&shca_list_lock);
775
776         return 0;
777
778 probe8:
779         ret = ehca_destroy_aqp1(&shca->sport[0]);
780         if (ret)
781                 ehca_err(&shca->ib_device,
782                          "Cannot destroy AQP1 for port 1. ret=%i", ret);
783
784 probe7:
785         ib_unregister_device(&shca->ib_device);
786
787 probe6:
788         ret = ehca_dereg_internal_maxmr(shca);
789         if (ret)
790                 ehca_err(&shca->ib_device,
791                          "Cannot destroy internal MR. ret=%x", ret);
792
793 probe5:
794         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
795         if (ret)
796                 ehca_err(&shca->ib_device,
797                          "Cannot destroy internal PD. ret=%x", ret);
798
799 probe4:
800         ret = ehca_destroy_eq(shca, &shca->neq);
801         if (ret)
802                 ehca_err(&shca->ib_device,
803                          "Cannot destroy NEQ. ret=%x", ret);
804
805 probe3:
806         ret = ehca_destroy_eq(shca, &shca->eq);
807         if (ret)
808                 ehca_err(&shca->ib_device,
809                          "Cannot destroy EQ. ret=%x", ret);
810
811 probe1:
812         ib_dealloc_device(&shca->ib_device);
813
814         return -EINVAL;
815 }
816
817 static int __devexit ehca_remove(struct of_device *dev)
818 {
819         struct ehca_shca *shca = dev->dev.driver_data;
820         int ret;
821
822         sysfs_remove_group(&dev->dev.kobj, &ehca_dev_attr_grp);
823
824         if (ehca_open_aqp1 == 1) {
825                 int i;
826                 for (i = 0; i < shca->num_ports; i++) {
827                         ret = ehca_destroy_aqp1(&shca->sport[i]);
828                         if (ret)
829                                 ehca_err(&shca->ib_device,
830                                          "Cannot destroy AQP1 for port %x "
831                                          "ret=%i", ret, i);
832                 }
833         }
834
835         ib_unregister_device(&shca->ib_device);
836
837         ret = ehca_dereg_internal_maxmr(shca);
838         if (ret)
839                 ehca_err(&shca->ib_device,
840                          "Cannot destroy internal MR. ret=%i", ret);
841
842         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
843         if (ret)
844                 ehca_err(&shca->ib_device,
845                          "Cannot destroy internal PD. ret=%i", ret);
846
847         ret = ehca_destroy_eq(shca, &shca->eq);
848         if (ret)
849                 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%i", ret);
850
851         ret = ehca_destroy_eq(shca, &shca->neq);
852         if (ret)
853                 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%i", ret);
854
855         ib_dealloc_device(&shca->ib_device);
856
857         spin_lock(&shca_list_lock);
858         list_del(&shca->shca_list);
859         spin_unlock(&shca_list_lock);
860
861         return ret;
862 }
863
864 static struct of_device_id ehca_device_table[] =
865 {
866         {
867                 .name       = "lhca",
868                 .compatible = "IBM,lhca",
869         },
870         {},
871 };
872
873 static struct of_platform_driver ehca_driver = {
874         .name        = "ehca",
875         .match_table = ehca_device_table,
876         .probe       = ehca_probe,
877         .remove      = ehca_remove,
878 };
879
880 void ehca_poll_eqs(unsigned long data)
881 {
882         struct ehca_shca *shca;
883
884         spin_lock(&shca_list_lock);
885         list_for_each_entry(shca, &shca_list, shca_list) {
886                 if (shca->eq.is_initialized) {
887                         /* call deadman proc only if eq ptr does not change */
888                         struct ehca_eq *eq = &shca->eq;
889                         int max = 3;
890                         volatile u64 q_ofs, q_ofs2;
891                         u64 flags;
892                         spin_lock_irqsave(&eq->spinlock, flags);
893                         q_ofs = eq->ipz_queue.current_q_offset;
894                         spin_unlock_irqrestore(&eq->spinlock, flags);
895                         do {
896                                 spin_lock_irqsave(&eq->spinlock, flags);
897                                 q_ofs2 = eq->ipz_queue.current_q_offset;
898                                 spin_unlock_irqrestore(&eq->spinlock, flags);
899                                 max--;
900                         } while (q_ofs == q_ofs2 && max > 0);
901                         if (q_ofs == q_ofs2)
902                                 ehca_process_eq(shca, 0);
903                 }
904         }
905         mod_timer(&poll_eqs_timer, jiffies + HZ);
906         spin_unlock(&shca_list_lock);
907 }
908
909 int __init ehca_module_init(void)
910 {
911         int ret;
912
913         printk(KERN_INFO "eHCA Infiniband Device Driver "
914                "(Version " HCAD_VERSION ")\n");
915
916         ret = ehca_create_comp_pool();
917         if (ret) {
918                 ehca_gen_err("Cannot create comp pool.");
919                 return ret;
920         }
921
922         ret = ehca_create_slab_caches();
923         if (ret) {
924                 ehca_gen_err("Cannot create SLAB caches");
925                 ret = -ENOMEM;
926                 goto module_init1;
927         }
928
929         ret = ibmebus_register_driver(&ehca_driver);
930         if (ret) {
931                 ehca_gen_err("Cannot register eHCA device driver");
932                 ret = -EINVAL;
933                 goto module_init2;
934         }
935
936         ret = sysfs_create_group(&ehca_driver.driver.kobj, &ehca_drv_attr_grp);
937         if (ret) /* only complain; we can live without attributes */
938                 ehca_gen_err("Cannot create driver attributes  ret=%d", ret);
939
940         if (ehca_poll_all_eqs != 1) {
941                 ehca_gen_err("WARNING!!!");
942                 ehca_gen_err("It is possible to lose interrupts.");
943         } else {
944                 init_timer(&poll_eqs_timer);
945                 poll_eqs_timer.function = ehca_poll_eqs;
946                 poll_eqs_timer.expires = jiffies + HZ;
947                 add_timer(&poll_eqs_timer);
948         }
949
950         return 0;
951
952 module_init2:
953         ehca_destroy_slab_caches();
954
955 module_init1:
956         ehca_destroy_comp_pool();
957         return ret;
958 };
959
960 void __exit ehca_module_exit(void)
961 {
962         if (ehca_poll_all_eqs == 1)
963                 del_timer_sync(&poll_eqs_timer);
964
965         sysfs_remove_group(&ehca_driver.driver.kobj, &ehca_drv_attr_grp);
966         ibmebus_unregister_driver(&ehca_driver);
967
968         ehca_destroy_slab_caches();
969
970         ehca_destroy_comp_pool();
971
972         idr_destroy(&ehca_cq_idr);
973         idr_destroy(&ehca_qp_idr);
974 };
975
976 module_init(ehca_module_init);
977 module_exit(ehca_module_exit);