Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik...
[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 #include "ehca_classes.h"
47 #include "ehca_iverbs.h"
48 #include "ehca_mrmw.h"
49 #include "ehca_tools.h"
50 #include "hcp_if.h"
51
52 MODULE_LICENSE("Dual BSD/GPL");
53 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
54 MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver");
55 MODULE_VERSION("SVNEHCA_0023");
56
57 int ehca_open_aqp1     = 0;
58 int ehca_debug_level   = 0;
59 int ehca_hw_level      = 0;
60 int ehca_nr_ports      = 2;
61 int ehca_use_hp_mr     = 0;
62 int ehca_port_act_time = 30;
63 int ehca_poll_all_eqs  = 1;
64 int ehca_static_rate   = -1;
65 int ehca_scaling_code  = 0;
66
67 module_param_named(open_aqp1,     ehca_open_aqp1,     int, 0);
68 module_param_named(debug_level,   ehca_debug_level,   int, 0);
69 module_param_named(hw_level,      ehca_hw_level,      int, 0);
70 module_param_named(nr_ports,      ehca_nr_ports,      int, 0);
71 module_param_named(use_hp_mr,     ehca_use_hp_mr,     int, 0);
72 module_param_named(port_act_time, ehca_port_act_time, int, 0);
73 module_param_named(poll_all_eqs,  ehca_poll_all_eqs,  int, 0);
74 module_param_named(static_rate,   ehca_static_rate,   int, 0);
75 module_param_named(scaling_code,   ehca_scaling_code,   int, 0);
76
77 MODULE_PARM_DESC(open_aqp1,
78                  "AQP1 on startup (0: no (default), 1: yes)");
79 MODULE_PARM_DESC(debug_level,
80                  "debug level"
81                  " (0: no debug traces (default), 1: with debug traces)");
82 MODULE_PARM_DESC(hw_level,
83                  "hardware level"
84                  " (0: autosensing (default), 1: v. 0.20, 2: v. 0.21)");
85 MODULE_PARM_DESC(nr_ports,
86                  "number of connected ports (default: 2)");
87 MODULE_PARM_DESC(use_hp_mr,
88                  "high performance MRs (0: no (default), 1: yes)");
89 MODULE_PARM_DESC(port_act_time,
90                  "time to wait for port activation (default: 30 sec)");
91 MODULE_PARM_DESC(poll_all_eqs,
92                  "polls all event queues periodically"
93                  " (0: no, 1: yes (default))");
94 MODULE_PARM_DESC(static_rate,
95                  "set permanent static rate (default: disabled)");
96 MODULE_PARM_DESC(scaling_code,
97                  "set scaling code (0: disabled/default, 1: enabled)");
98
99 DEFINE_RWLOCK(ehca_qp_idr_lock);
100 DEFINE_RWLOCK(ehca_cq_idr_lock);
101 DEFINE_IDR(ehca_qp_idr);
102 DEFINE_IDR(ehca_cq_idr);
103
104 static LIST_HEAD(shca_list); /* list of all registered ehcas */
105 static DEFINE_SPINLOCK(shca_list_lock);
106
107 static struct timer_list poll_eqs_timer;
108
109 #ifdef CONFIG_PPC_64K_PAGES
110 static struct kmem_cache *ctblk_cache = NULL;
111
112 void *ehca_alloc_fw_ctrlblock(gfp_t flags)
113 {
114         void *ret = kmem_cache_zalloc(ctblk_cache, flags);
115         if (!ret)
116                 ehca_gen_err("Out of memory for ctblk");
117         return ret;
118 }
119
120 void ehca_free_fw_ctrlblock(void *ptr)
121 {
122         if (ptr)
123                 kmem_cache_free(ctblk_cache, ptr);
124
125 }
126 #endif
127
128 static int ehca_create_slab_caches(void)
129 {
130         int ret;
131
132         ret = ehca_init_pd_cache();
133         if (ret) {
134                 ehca_gen_err("Cannot create PD SLAB cache.");
135                 return ret;
136         }
137
138         ret = ehca_init_cq_cache();
139         if (ret) {
140                 ehca_gen_err("Cannot create CQ SLAB cache.");
141                 goto create_slab_caches2;
142         }
143
144         ret = ehca_init_qp_cache();
145         if (ret) {
146                 ehca_gen_err("Cannot create QP SLAB cache.");
147                 goto create_slab_caches3;
148         }
149
150         ret = ehca_init_av_cache();
151         if (ret) {
152                 ehca_gen_err("Cannot create AV SLAB cache.");
153                 goto create_slab_caches4;
154         }
155
156         ret = ehca_init_mrmw_cache();
157         if (ret) {
158                 ehca_gen_err("Cannot create MR&MW SLAB cache.");
159                 goto create_slab_caches5;
160         }
161
162 #ifdef CONFIG_PPC_64K_PAGES
163         ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
164                                         EHCA_PAGESIZE, H_CB_ALIGNMENT,
165                                         SLAB_HWCACHE_ALIGN,
166                                         NULL, NULL);
167         if (!ctblk_cache) {
168                 ehca_gen_err("Cannot create ctblk SLAB cache.");
169                 ehca_cleanup_mrmw_cache();
170                 goto create_slab_caches5;
171         }
172 #endif
173         return 0;
174
175 create_slab_caches5:
176         ehca_cleanup_av_cache();
177
178 create_slab_caches4:
179         ehca_cleanup_qp_cache();
180
181 create_slab_caches3:
182         ehca_cleanup_cq_cache();
183
184 create_slab_caches2:
185         ehca_cleanup_pd_cache();
186
187         return ret;
188 }
189
190 static void ehca_destroy_slab_caches(void)
191 {
192         ehca_cleanup_mrmw_cache();
193         ehca_cleanup_av_cache();
194         ehca_cleanup_qp_cache();
195         ehca_cleanup_cq_cache();
196         ehca_cleanup_pd_cache();
197 #ifdef CONFIG_PPC_64K_PAGES
198         if (ctblk_cache)
199                 kmem_cache_destroy(ctblk_cache);
200 #endif
201 }
202
203 #define EHCA_HCAAVER  EHCA_BMASK_IBM(32,39)
204 #define EHCA_REVID    EHCA_BMASK_IBM(40,63)
205
206 static struct cap_descr {
207         u64 mask;
208         char *descr;
209 } hca_cap_descr[] = {
210         { HCA_CAP_AH_PORT_NR_CHECK, "HCA_CAP_AH_PORT_NR_CHECK" },
211         { HCA_CAP_ATOMIC, "HCA_CAP_ATOMIC" },
212         { HCA_CAP_AUTO_PATH_MIG, "HCA_CAP_AUTO_PATH_MIG" },
213         { HCA_CAP_BAD_P_KEY_CTR, "HCA_CAP_BAD_P_KEY_CTR" },
214         { HCA_CAP_SQD_RTS_PORT_CHANGE, "HCA_CAP_SQD_RTS_PORT_CHANGE" },
215         { HCA_CAP_CUR_QP_STATE_MOD, "HCA_CAP_CUR_QP_STATE_MOD" },
216         { HCA_CAP_INIT_TYPE, "HCA_CAP_INIT_TYPE" },
217         { HCA_CAP_PORT_ACTIVE_EVENT, "HCA_CAP_PORT_ACTIVE_EVENT" },
218         { HCA_CAP_Q_KEY_VIOL_CTR, "HCA_CAP_Q_KEY_VIOL_CTR" },
219         { HCA_CAP_WQE_RESIZE, "HCA_CAP_WQE_RESIZE" },
220         { HCA_CAP_RAW_PACKET_MCAST, "HCA_CAP_RAW_PACKET_MCAST" },
221         { HCA_CAP_SHUTDOWN_PORT, "HCA_CAP_SHUTDOWN_PORT" },
222         { HCA_CAP_RC_LL_QP, "HCA_CAP_RC_LL_QP" },
223         { HCA_CAP_SRQ, "HCA_CAP_SRQ" },
224         { HCA_CAP_UD_LL_QP, "HCA_CAP_UD_LL_QP" },
225         { HCA_CAP_RESIZE_MR, "HCA_CAP_RESIZE_MR" },
226         { HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" },
227 };
228
229 int ehca_sense_attributes(struct ehca_shca *shca)
230 {
231         int i, ret = 0;
232         u64 h_ret;
233         struct hipz_query_hca *rblock;
234         struct hipz_query_port *port;
235
236         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
237         if (!rblock) {
238                 ehca_gen_err("Cannot allocate rblock memory.");
239                 return -ENOMEM;
240         }
241
242         h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
243         if (h_ret != H_SUCCESS) {
244                 ehca_gen_err("Cannot query device properties. h_ret=%lx",
245                              h_ret);
246                 ret = -EPERM;
247                 goto sense_attributes1;
248         }
249
250         if (ehca_nr_ports == 1)
251                 shca->num_ports = 1;
252         else
253                 shca->num_ports = (u8)rblock->num_ports;
254
255         ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
256
257         if (ehca_hw_level == 0) {
258                 u32 hcaaver;
259                 u32 revid;
260
261                 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
262                 revid   = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
263
264                 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
265
266                 if ((hcaaver == 1) && (revid == 0))
267                         shca->hw_level = 0x11;
268                 else if ((hcaaver == 1) && (revid == 1))
269                         shca->hw_level = 0x12;
270                 else if ((hcaaver == 1) && (revid == 2))
271                         shca->hw_level = 0x13;
272                 else if ((hcaaver == 2) && (revid == 0))
273                         shca->hw_level = 0x21;
274                 else if ((hcaaver == 2) && (revid == 0x10))
275                         shca->hw_level = 0x22;
276                 else {
277                         ehca_gen_warn("unknown hardware version"
278                                       " - assuming default level");
279                         shca->hw_level = 0x22;
280                 }
281         }
282         ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
283
284         shca->sport[0].rate = IB_RATE_30_GBPS;
285         shca->sport[1].rate = IB_RATE_30_GBPS;
286
287         shca->hca_cap = rblock->hca_cap_indicators;
288         ehca_gen_dbg(" ... HCA capabilities:");
289         for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
290                 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
291                         ehca_gen_dbg("   %s", hca_cap_descr[i].descr);
292
293         port = (struct hipz_query_port *) rblock;
294         h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
295         if (h_ret != H_SUCCESS) {
296                 ehca_gen_err("Cannot query port properties. h_ret=%lx",
297                              h_ret);
298                 ret = -EPERM;
299                 goto sense_attributes1;
300         }
301
302         shca->max_mtu = port->max_mtu;
303
304 sense_attributes1:
305         ehca_free_fw_ctrlblock(rblock);
306         return ret;
307 }
308
309 static int init_node_guid(struct ehca_shca *shca)
310 {
311         int ret = 0;
312         struct hipz_query_hca *rblock;
313
314         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
315         if (!rblock) {
316                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
317                 return -ENOMEM;
318         }
319
320         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
321                 ehca_err(&shca->ib_device, "Can't query device properties");
322                 ret = -EINVAL;
323                 goto init_node_guid1;
324         }
325
326         memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
327
328 init_node_guid1:
329         ehca_free_fw_ctrlblock(rblock);
330         return ret;
331 }
332
333 int ehca_init_device(struct ehca_shca *shca)
334 {
335         int ret;
336
337         ret = init_node_guid(shca);
338         if (ret)
339                 return ret;
340
341         strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
342         shca->ib_device.owner               = THIS_MODULE;
343
344         shca->ib_device.uverbs_abi_ver      = 7;
345         shca->ib_device.uverbs_cmd_mask     =
346                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
347                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
348                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
349                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
350                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
351                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
352                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
353                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
354                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
355                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
356                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
357                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
358                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
359                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
360                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
361                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
362
363         shca->ib_device.node_type           = RDMA_NODE_IB_CA;
364         shca->ib_device.phys_port_cnt       = shca->num_ports;
365         shca->ib_device.num_comp_vectors    = 1;
366         shca->ib_device.dma_device          = &shca->ibmebus_dev->ofdev.dev;
367         shca->ib_device.query_device        = ehca_query_device;
368         shca->ib_device.query_port          = ehca_query_port;
369         shca->ib_device.query_gid           = ehca_query_gid;
370         shca->ib_device.query_pkey          = ehca_query_pkey;
371         /* shca->in_device.modify_device    = ehca_modify_device    */
372         shca->ib_device.modify_port         = ehca_modify_port;
373         shca->ib_device.alloc_ucontext      = ehca_alloc_ucontext;
374         shca->ib_device.dealloc_ucontext    = ehca_dealloc_ucontext;
375         shca->ib_device.alloc_pd            = ehca_alloc_pd;
376         shca->ib_device.dealloc_pd          = ehca_dealloc_pd;
377         shca->ib_device.create_ah           = ehca_create_ah;
378         /* shca->ib_device.modify_ah        = ehca_modify_ah;       */
379         shca->ib_device.query_ah            = ehca_query_ah;
380         shca->ib_device.destroy_ah          = ehca_destroy_ah;
381         shca->ib_device.create_qp           = ehca_create_qp;
382         shca->ib_device.modify_qp           = ehca_modify_qp;
383         shca->ib_device.query_qp            = ehca_query_qp;
384         shca->ib_device.destroy_qp          = ehca_destroy_qp;
385         shca->ib_device.post_send           = ehca_post_send;
386         shca->ib_device.post_recv           = ehca_post_recv;
387         shca->ib_device.create_cq           = ehca_create_cq;
388         shca->ib_device.destroy_cq          = ehca_destroy_cq;
389         shca->ib_device.resize_cq           = ehca_resize_cq;
390         shca->ib_device.poll_cq             = ehca_poll_cq;
391         /* shca->ib_device.peek_cq          = ehca_peek_cq;         */
392         shca->ib_device.req_notify_cq       = ehca_req_notify_cq;
393         /* shca->ib_device.req_ncomp_notif  = ehca_req_ncomp_notif; */
394         shca->ib_device.get_dma_mr          = ehca_get_dma_mr;
395         shca->ib_device.reg_phys_mr         = ehca_reg_phys_mr;
396         shca->ib_device.reg_user_mr         = ehca_reg_user_mr;
397         shca->ib_device.query_mr            = ehca_query_mr;
398         shca->ib_device.dereg_mr            = ehca_dereg_mr;
399         shca->ib_device.rereg_phys_mr       = ehca_rereg_phys_mr;
400         shca->ib_device.alloc_mw            = ehca_alloc_mw;
401         shca->ib_device.bind_mw             = ehca_bind_mw;
402         shca->ib_device.dealloc_mw          = ehca_dealloc_mw;
403         shca->ib_device.alloc_fmr           = ehca_alloc_fmr;
404         shca->ib_device.map_phys_fmr        = ehca_map_phys_fmr;
405         shca->ib_device.unmap_fmr           = ehca_unmap_fmr;
406         shca->ib_device.dealloc_fmr         = ehca_dealloc_fmr;
407         shca->ib_device.attach_mcast        = ehca_attach_mcast;
408         shca->ib_device.detach_mcast        = ehca_detach_mcast;
409         /* shca->ib_device.process_mad      = ehca_process_mad;     */
410         shca->ib_device.mmap                = ehca_mmap;
411
412         if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
413                 shca->ib_device.uverbs_cmd_mask |=
414                         (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
415                         (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
416                         (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
417                         (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
418
419                 shca->ib_device.create_srq          = ehca_create_srq;
420                 shca->ib_device.modify_srq          = ehca_modify_srq;
421                 shca->ib_device.query_srq           = ehca_query_srq;
422                 shca->ib_device.destroy_srq         = ehca_destroy_srq;
423                 shca->ib_device.post_srq_recv       = ehca_post_srq_recv;
424         }
425
426         return ret;
427 }
428
429 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
430 {
431         struct ehca_sport *sport = &shca->sport[port - 1];
432         struct ib_cq *ibcq;
433         struct ib_qp *ibqp;
434         struct ib_qp_init_attr qp_init_attr;
435         int ret;
436
437         if (sport->ibcq_aqp1) {
438                 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
439                 return -EPERM;
440         }
441
442         ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void*)(-1), 10, 0);
443         if (IS_ERR(ibcq)) {
444                 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
445                 return PTR_ERR(ibcq);
446         }
447         sport->ibcq_aqp1 = ibcq;
448
449         if (sport->ibqp_aqp1) {
450                 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
451                 ret = -EPERM;
452                 goto create_aqp1;
453         }
454
455         memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
456         qp_init_attr.send_cq          = ibcq;
457         qp_init_attr.recv_cq          = ibcq;
458         qp_init_attr.sq_sig_type      = IB_SIGNAL_ALL_WR;
459         qp_init_attr.cap.max_send_wr  = 100;
460         qp_init_attr.cap.max_recv_wr  = 100;
461         qp_init_attr.cap.max_send_sge = 2;
462         qp_init_attr.cap.max_recv_sge = 1;
463         qp_init_attr.qp_type          = IB_QPT_GSI;
464         qp_init_attr.port_num         = port;
465         qp_init_attr.qp_context       = NULL;
466         qp_init_attr.event_handler    = NULL;
467         qp_init_attr.srq              = NULL;
468
469         ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
470         if (IS_ERR(ibqp)) {
471                 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
472                 ret = PTR_ERR(ibqp);
473                 goto create_aqp1;
474         }
475         sport->ibqp_aqp1 = ibqp;
476
477         return 0;
478
479 create_aqp1:
480         ib_destroy_cq(sport->ibcq_aqp1);
481         return ret;
482 }
483
484 static int ehca_destroy_aqp1(struct ehca_sport *sport)
485 {
486         int ret;
487
488         ret = ib_destroy_qp(sport->ibqp_aqp1);
489         if (ret) {
490                 ehca_gen_err("Cannot destroy AQP1 QP. ret=%x", ret);
491                 return ret;
492         }
493
494         ret = ib_destroy_cq(sport->ibcq_aqp1);
495         if (ret)
496                 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%x", ret);
497
498         return ret;
499 }
500
501 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
502 {
503         return snprintf(buf, PAGE_SIZE, "%d\n",
504                         ehca_debug_level);
505 }
506
507 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
508                                       const char *buf, size_t count)
509 {
510         int value = (*buf) - '0';
511         if (value >= 0 && value <= 9)
512                 ehca_debug_level = value;
513         return 1;
514 }
515
516 DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
517             ehca_show_debug_level, ehca_store_debug_level);
518
519 static struct attribute *ehca_drv_attrs[] = {
520         &driver_attr_debug_level.attr,
521         NULL
522 };
523
524 static struct attribute_group ehca_drv_attr_grp = {
525         .attrs = ehca_drv_attrs
526 };
527
528 #define EHCA_RESOURCE_ATTR(name)                                           \
529 static ssize_t  ehca_show_##name(struct device *dev,                       \
530                                  struct device_attribute *attr,            \
531                                  char *buf)                                \
532 {                                                                          \
533         struct ehca_shca *shca;                                            \
534         struct hipz_query_hca *rblock;                                     \
535         int data;                                                          \
536                                                                            \
537         shca = dev->driver_data;                                           \
538                                                                            \
539         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);                      \
540         if (!rblock) {                                                     \
541                 dev_err(dev, "Can't allocate rblock memory.");             \
542                 return 0;                                                  \
543         }                                                                  \
544                                                                            \
545         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
546                 dev_err(dev, "Can't query device properties");             \
547                 ehca_free_fw_ctrlblock(rblock);                            \
548                 return 0;                                                  \
549         }                                                                  \
550                                                                            \
551         data = rblock->name;                                               \
552         ehca_free_fw_ctrlblock(rblock);                                    \
553                                                                            \
554         if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1))     \
555                 return snprintf(buf, 256, "1\n");                          \
556         else                                                               \
557                 return snprintf(buf, 256, "%d\n", data);                   \
558                                                                            \
559 }                                                                          \
560 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
561
562 EHCA_RESOURCE_ATTR(num_ports);
563 EHCA_RESOURCE_ATTR(hw_ver);
564 EHCA_RESOURCE_ATTR(max_eq);
565 EHCA_RESOURCE_ATTR(cur_eq);
566 EHCA_RESOURCE_ATTR(max_cq);
567 EHCA_RESOURCE_ATTR(cur_cq);
568 EHCA_RESOURCE_ATTR(max_qp);
569 EHCA_RESOURCE_ATTR(cur_qp);
570 EHCA_RESOURCE_ATTR(max_mr);
571 EHCA_RESOURCE_ATTR(cur_mr);
572 EHCA_RESOURCE_ATTR(max_mw);
573 EHCA_RESOURCE_ATTR(cur_mw);
574 EHCA_RESOURCE_ATTR(max_pd);
575 EHCA_RESOURCE_ATTR(max_ah);
576
577 static ssize_t ehca_show_adapter_handle(struct device *dev,
578                                         struct device_attribute *attr,
579                                         char *buf)
580 {
581         struct ehca_shca *shca = dev->driver_data;
582
583         return sprintf(buf, "%lx\n", shca->ipz_hca_handle.handle);
584
585 }
586 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
587
588 static struct attribute *ehca_dev_attrs[] = {
589         &dev_attr_adapter_handle.attr,
590         &dev_attr_num_ports.attr,
591         &dev_attr_hw_ver.attr,
592         &dev_attr_max_eq.attr,
593         &dev_attr_cur_eq.attr,
594         &dev_attr_max_cq.attr,
595         &dev_attr_cur_cq.attr,
596         &dev_attr_max_qp.attr,
597         &dev_attr_cur_qp.attr,
598         &dev_attr_max_mr.attr,
599         &dev_attr_cur_mr.attr,
600         &dev_attr_max_mw.attr,
601         &dev_attr_cur_mw.attr,
602         &dev_attr_max_pd.attr,
603         &dev_attr_max_ah.attr,
604         NULL
605 };
606
607 static struct attribute_group ehca_dev_attr_grp = {
608         .attrs = ehca_dev_attrs
609 };
610
611 static int __devinit ehca_probe(struct ibmebus_dev *dev,
612                                 const struct of_device_id *id)
613 {
614         struct ehca_shca *shca;
615         const u64 *handle;
616         struct ib_pd *ibpd;
617         int ret;
618
619         handle = of_get_property(dev->ofdev.node, "ibm,hca-handle", NULL);
620         if (!handle) {
621                 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
622                              dev->ofdev.node->full_name);
623                 return -ENODEV;
624         }
625
626         if (!(*handle)) {
627                 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
628                              dev->ofdev.node->full_name);
629                 return -ENODEV;
630         }
631
632         shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
633         if (!shca) {
634                 ehca_gen_err("Cannot allocate shca memory.");
635                 return -ENOMEM;
636         }
637         mutex_init(&shca->modify_mutex);
638
639         shca->ibmebus_dev = dev;
640         shca->ipz_hca_handle.handle = *handle;
641         dev->ofdev.dev.driver_data = shca;
642
643         ret = ehca_sense_attributes(shca);
644         if (ret < 0) {
645                 ehca_gen_err("Cannot sense eHCA attributes.");
646                 goto probe1;
647         }
648
649         ret = ehca_init_device(shca);
650         if (ret) {
651                 ehca_gen_err("Cannot init ehca  device struct");
652                 goto probe1;
653         }
654
655         /* create event queues */
656         ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, 2048);
657         if (ret) {
658                 ehca_err(&shca->ib_device, "Cannot create EQ.");
659                 goto probe1;
660         }
661
662         ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
663         if (ret) {
664                 ehca_err(&shca->ib_device, "Cannot create NEQ.");
665                 goto probe3;
666         }
667
668         /* create internal protection domain */
669         ibpd = ehca_alloc_pd(&shca->ib_device, (void*)(-1), NULL);
670         if (IS_ERR(ibpd)) {
671                 ehca_err(&shca->ib_device, "Cannot create internal PD.");
672                 ret = PTR_ERR(ibpd);
673                 goto probe4;
674         }
675
676         shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
677         shca->pd->ib_pd.device = &shca->ib_device;
678
679         /* create internal max MR */
680         ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
681
682         if (ret) {
683                 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%x",
684                          ret);
685                 goto probe5;
686         }
687
688         ret = ib_register_device(&shca->ib_device);
689         if (ret) {
690                 ehca_err(&shca->ib_device,
691                          "ib_register_device() failed ret=%x", ret);
692                 goto probe6;
693         }
694
695         /* create AQP1 for port 1 */
696         if (ehca_open_aqp1 == 1) {
697                 shca->sport[0].port_state = IB_PORT_DOWN;
698                 ret = ehca_create_aqp1(shca, 1);
699                 if (ret) {
700                         ehca_err(&shca->ib_device,
701                                  "Cannot create AQP1 for port 1.");
702                         goto probe7;
703                 }
704         }
705
706         /* create AQP1 for port 2 */
707         if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
708                 shca->sport[1].port_state = IB_PORT_DOWN;
709                 ret = ehca_create_aqp1(shca, 2);
710                 if (ret) {
711                         ehca_err(&shca->ib_device,
712                                  "Cannot create AQP1 for port 2.");
713                         goto probe8;
714                 }
715         }
716
717         ret = sysfs_create_group(&dev->ofdev.dev.kobj, &ehca_dev_attr_grp);
718         if (ret) /* only complain; we can live without attributes */
719                 ehca_err(&shca->ib_device,
720                          "Cannot create device attributes  ret=%d", ret);
721
722         spin_lock(&shca_list_lock);
723         list_add(&shca->shca_list, &shca_list);
724         spin_unlock(&shca_list_lock);
725
726         return 0;
727
728 probe8:
729         ret = ehca_destroy_aqp1(&shca->sport[0]);
730         if (ret)
731                 ehca_err(&shca->ib_device,
732                          "Cannot destroy AQP1 for port 1. ret=%x", ret);
733
734 probe7:
735         ib_unregister_device(&shca->ib_device);
736
737 probe6:
738         ret = ehca_dereg_internal_maxmr(shca);
739         if (ret)
740                 ehca_err(&shca->ib_device,
741                          "Cannot destroy internal MR. ret=%x", ret);
742
743 probe5:
744         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
745         if (ret)
746                 ehca_err(&shca->ib_device,
747                          "Cannot destroy internal PD. ret=%x", ret);
748
749 probe4:
750         ret = ehca_destroy_eq(shca, &shca->neq);
751         if (ret)
752                 ehca_err(&shca->ib_device,
753                          "Cannot destroy NEQ. ret=%x", ret);
754
755 probe3:
756         ret = ehca_destroy_eq(shca, &shca->eq);
757         if (ret)
758                 ehca_err(&shca->ib_device,
759                          "Cannot destroy EQ. ret=%x", ret);
760
761 probe1:
762         ib_dealloc_device(&shca->ib_device);
763
764         return -EINVAL;
765 }
766
767 static int __devexit ehca_remove(struct ibmebus_dev *dev)
768 {
769         struct ehca_shca *shca = dev->ofdev.dev.driver_data;
770         int ret;
771
772         sysfs_remove_group(&dev->ofdev.dev.kobj, &ehca_dev_attr_grp);
773
774         if (ehca_open_aqp1 == 1) {
775                 int i;
776                 for (i = 0; i < shca->num_ports; i++) {
777                         ret = ehca_destroy_aqp1(&shca->sport[i]);
778                         if (ret)
779                                 ehca_err(&shca->ib_device,
780                                          "Cannot destroy AQP1 for port %x "
781                                          "ret=%x", ret, i);
782                 }
783         }
784
785         ib_unregister_device(&shca->ib_device);
786
787         ret = ehca_dereg_internal_maxmr(shca);
788         if (ret)
789                 ehca_err(&shca->ib_device,
790                          "Cannot destroy internal MR. ret=%x", ret);
791
792         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
793         if (ret)
794                 ehca_err(&shca->ib_device,
795                          "Cannot destroy internal PD. ret=%x", ret);
796
797         ret = ehca_destroy_eq(shca, &shca->eq);
798         if (ret)
799                 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%x", ret);
800
801         ret = ehca_destroy_eq(shca, &shca->neq);
802         if (ret)
803                 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%x", ret);
804
805         ib_dealloc_device(&shca->ib_device);
806
807         spin_lock(&shca_list_lock);
808         list_del(&shca->shca_list);
809         spin_unlock(&shca_list_lock);
810
811         return ret;
812 }
813
814 static struct of_device_id ehca_device_table[] =
815 {
816         {
817                 .name       = "lhca",
818                 .compatible = "IBM,lhca",
819         },
820         {},
821 };
822
823 static struct ibmebus_driver ehca_driver = {
824         .name     = "ehca",
825         .id_table = ehca_device_table,
826         .probe    = ehca_probe,
827         .remove   = ehca_remove,
828 };
829
830 void ehca_poll_eqs(unsigned long data)
831 {
832         struct ehca_shca *shca;
833
834         spin_lock(&shca_list_lock);
835         list_for_each_entry(shca, &shca_list, shca_list) {
836                 if (shca->eq.is_initialized) {
837                         /* call deadman proc only if eq ptr does not change */
838                         struct ehca_eq *eq = &shca->eq;
839                         int max = 3;
840                         volatile u64 q_ofs, q_ofs2;
841                         u64 flags;
842                         spin_lock_irqsave(&eq->spinlock, flags);
843                         q_ofs = eq->ipz_queue.current_q_offset;
844                         spin_unlock_irqrestore(&eq->spinlock, flags);
845                         do {
846                                 spin_lock_irqsave(&eq->spinlock, flags);
847                                 q_ofs2 = eq->ipz_queue.current_q_offset;
848                                 spin_unlock_irqrestore(&eq->spinlock, flags);
849                                 max--;
850                         } while (q_ofs == q_ofs2 && max > 0);
851                         if (q_ofs == q_ofs2)
852                                 ehca_process_eq(shca, 0);
853                 }
854         }
855         mod_timer(&poll_eqs_timer, jiffies + HZ);
856         spin_unlock(&shca_list_lock);
857 }
858
859 int __init ehca_module_init(void)
860 {
861         int ret;
862
863         printk(KERN_INFO "eHCA Infiniband Device Driver "
864                "(Rel.: SVNEHCA_0023)\n");
865
866         if ((ret = ehca_create_comp_pool())) {
867                 ehca_gen_err("Cannot create comp pool.");
868                 return ret;
869         }
870
871         if ((ret = ehca_create_slab_caches())) {
872                 ehca_gen_err("Cannot create SLAB caches");
873                 ret = -ENOMEM;
874                 goto module_init1;
875         }
876
877         if ((ret = ibmebus_register_driver(&ehca_driver))) {
878                 ehca_gen_err("Cannot register eHCA device driver");
879                 ret = -EINVAL;
880                 goto module_init2;
881         }
882
883         ret = sysfs_create_group(&ehca_driver.driver.kobj, &ehca_drv_attr_grp);
884         if (ret) /* only complain; we can live without attributes */
885                 ehca_gen_err("Cannot create driver attributes  ret=%d", ret);
886
887         if (ehca_poll_all_eqs != 1) {
888                 ehca_gen_err("WARNING!!!");
889                 ehca_gen_err("It is possible to lose interrupts.");
890         } else {
891                 init_timer(&poll_eqs_timer);
892                 poll_eqs_timer.function = ehca_poll_eqs;
893                 poll_eqs_timer.expires = jiffies + HZ;
894                 add_timer(&poll_eqs_timer);
895         }
896
897         return 0;
898
899 module_init2:
900         ehca_destroy_slab_caches();
901
902 module_init1:
903         ehca_destroy_comp_pool();
904         return ret;
905 };
906
907 void __exit ehca_module_exit(void)
908 {
909         if (ehca_poll_all_eqs == 1)
910                 del_timer_sync(&poll_eqs_timer);
911
912         sysfs_remove_group(&ehca_driver.driver.kobj, &ehca_drv_attr_grp);
913         ibmebus_unregister_driver(&ehca_driver);
914
915         ehca_destroy_slab_caches();
916
917         ehca_destroy_comp_pool();
918
919         idr_destroy(&ehca_cq_idr);
920         idr_destroy(&ehca_qp_idr);
921 };
922
923 module_init(ehca_module_init);
924 module_exit(ehca_module_exit);