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ehca_main.c
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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 <[email protected]>
7  * Hoang-Nam Nguyen <[email protected]>
8  * Joachim Fenkes <[email protected]>
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 <[email protected]>");
59 MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver");
60 MODULE_VERSION(HCAD_VERSION);
61 
62 static bool ehca_open_aqp1 = 0;
63 static int ehca_hw_level = 0;
64 static bool ehca_poll_all_eqs = 1;
65 
66 int ehca_debug_level = 0;
67 int ehca_nr_ports = -1;
68 bool ehca_use_hp_mr = 0;
69 int ehca_port_act_time = 30;
70 int ehca_static_rate = -1;
71 bool 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, bint, 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->dev.of_node->full_name);
295  loc_code = of_get_property(shca->ofdev->dev.of_node, "ibm,loc-code",
296  NULL);
297  if (loc_code)
298  ehca_gen_dbg(" ... location lode=%s", loc_code);
299 
300  rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
301  if (!rblock) {
302  ehca_gen_err("Cannot allocate rblock memory.");
303  return -ENOMEM;
304  }
305 
306  h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
307  if (h_ret != H_SUCCESS) {
308  ehca_gen_err("Cannot query device properties. h_ret=%lli",
309  h_ret);
310  ret = -EPERM;
311  goto sense_attributes1;
312  }
313 
314  if (ehca_nr_ports == 1)
315  shca->num_ports = 1;
316  else
317  shca->num_ports = (u8)rblock->num_ports;
318 
319  ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
320 
321  if (ehca_hw_level == 0) {
322  u32 hcaaver;
323  u32 revid;
324 
325  hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
326  revid = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
327 
328  ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
329 
330  if (hcaaver == 1) {
331  if (revid <= 3)
332  shca->hw_level = 0x10 | (revid + 1);
333  else
334  shca->hw_level = 0x14;
335  } else if (hcaaver == 2) {
336  if (revid == 0)
337  shca->hw_level = 0x21;
338  else if (revid == 0x10)
339  shca->hw_level = 0x22;
340  else if (revid == 0x20 || revid == 0x21)
341  shca->hw_level = 0x23;
342  }
343 
344  if (!shca->hw_level) {
345  ehca_gen_warn("unknown hardware version"
346  " - assuming default level");
347  shca->hw_level = 0x22;
348  }
349  } else
350  shca->hw_level = ehca_hw_level;
351  ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
352 
353  shca->hca_cap = rblock->hca_cap_indicators;
354  ehca_gen_dbg(" ... HCA capabilities:");
355  for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
356  if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
357  ehca_gen_dbg(" %s", hca_cap_descr[i].descr);
358 
359  /* Autodetect hCall locking -- the "H_ALLOC_RESOURCE synced" flag is
360  * a firmware property, so it's valid across all adapters
361  */
362  if (ehca_lock_hcalls == -1)
363  ehca_lock_hcalls = !EHCA_BMASK_GET(HCA_CAP_H_ALLOC_RES_SYNC,
364  shca->hca_cap);
365 
366  /* translate supported MR page sizes; always support 4K */
367  shca->hca_cap_mr_pgsize = EHCA_PAGESIZE;
368  for (i = 0; i < ARRAY_SIZE(pgsize_map); i += 2)
369  if (rblock->memory_page_size_supported & pgsize_map[i])
370  shca->hca_cap_mr_pgsize |= pgsize_map[i + 1];
371 
372  /* Set maximum number of CQs and QPs to calculate EQ size */
373  if (shca->max_num_qps == -1)
374  shca->max_num_qps = min_t(int, rblock->max_qp,
375  EHCA_MAX_NUM_QUEUES);
376  else if (shca->max_num_qps < 1 || shca->max_num_qps > rblock->max_qp) {
377  ehca_gen_warn("The requested number of QPs is out of range "
378  "(1 - %i) specified by HW. Value is set to %i",
379  rblock->max_qp, rblock->max_qp);
380  shca->max_num_qps = rblock->max_qp;
381  }
382 
383  if (shca->max_num_cqs == -1)
384  shca->max_num_cqs = min_t(int, rblock->max_cq,
385  EHCA_MAX_NUM_QUEUES);
386  else if (shca->max_num_cqs < 1 || shca->max_num_cqs > rblock->max_cq) {
387  ehca_gen_warn("The requested number of CQs is out of range "
388  "(1 - %i) specified by HW. Value is set to %i",
389  rblock->max_cq, rblock->max_cq);
390  }
391 
392  /* query max MTU from first port -- it's the same for all ports */
393  port = (struct hipz_query_port *)rblock;
394  h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
395  if (h_ret != H_SUCCESS) {
396  ehca_gen_err("Cannot query port properties. h_ret=%lli",
397  h_ret);
398  ret = -EPERM;
399  goto sense_attributes1;
400  }
401 
402  shca->max_mtu = port->max_mtu;
403 
404 sense_attributes1:
405  ehca_free_fw_ctrlblock(rblock);
406  return ret;
407 }
408 
409 static int init_node_guid(struct ehca_shca *shca)
410 {
411  int ret = 0;
412  struct hipz_query_hca *rblock;
413 
414  rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
415  if (!rblock) {
416  ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
417  return -ENOMEM;
418  }
419 
420  if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
421  ehca_err(&shca->ib_device, "Can't query device properties");
422  ret = -EINVAL;
423  goto init_node_guid1;
424  }
425 
426  memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
427 
428 init_node_guid1:
429  ehca_free_fw_ctrlblock(rblock);
430  return ret;
431 }
432 
433 static int ehca_init_device(struct ehca_shca *shca)
434 {
435  int ret;
436 
437  ret = init_node_guid(shca);
438  if (ret)
439  return ret;
440 
441  strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
442  shca->ib_device.owner = THIS_MODULE;
443 
444  shca->ib_device.uverbs_abi_ver = 8;
445  shca->ib_device.uverbs_cmd_mask =
446  (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
447  (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
448  (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
449  (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
450  (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
451  (1ull << IB_USER_VERBS_CMD_REG_MR) |
452  (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
453  (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
454  (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
455  (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
456  (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
457  (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
458  (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
459  (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
460  (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) |
461  (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
462 
463  shca->ib_device.node_type = RDMA_NODE_IB_CA;
464  shca->ib_device.phys_port_cnt = shca->num_ports;
465  shca->ib_device.num_comp_vectors = 1;
466  shca->ib_device.dma_device = &shca->ofdev->dev;
467  shca->ib_device.query_device = ehca_query_device;
468  shca->ib_device.query_port = ehca_query_port;
469  shca->ib_device.query_gid = ehca_query_gid;
470  shca->ib_device.query_pkey = ehca_query_pkey;
471  /* shca->in_device.modify_device = ehca_modify_device */
472  shca->ib_device.modify_port = ehca_modify_port;
473  shca->ib_device.alloc_ucontext = ehca_alloc_ucontext;
474  shca->ib_device.dealloc_ucontext = ehca_dealloc_ucontext;
475  shca->ib_device.alloc_pd = ehca_alloc_pd;
476  shca->ib_device.dealloc_pd = ehca_dealloc_pd;
477  shca->ib_device.create_ah = ehca_create_ah;
478  /* shca->ib_device.modify_ah = ehca_modify_ah; */
479  shca->ib_device.query_ah = ehca_query_ah;
480  shca->ib_device.destroy_ah = ehca_destroy_ah;
481  shca->ib_device.create_qp = ehca_create_qp;
482  shca->ib_device.modify_qp = ehca_modify_qp;
483  shca->ib_device.query_qp = ehca_query_qp;
484  shca->ib_device.destroy_qp = ehca_destroy_qp;
485  shca->ib_device.post_send = ehca_post_send;
486  shca->ib_device.post_recv = ehca_post_recv;
487  shca->ib_device.create_cq = ehca_create_cq;
488  shca->ib_device.destroy_cq = ehca_destroy_cq;
489  shca->ib_device.resize_cq = ehca_resize_cq;
490  shca->ib_device.poll_cq = ehca_poll_cq;
491  /* shca->ib_device.peek_cq = ehca_peek_cq; */
492  shca->ib_device.req_notify_cq = ehca_req_notify_cq;
493  /* shca->ib_device.req_ncomp_notif = ehca_req_ncomp_notif; */
494  shca->ib_device.get_dma_mr = ehca_get_dma_mr;
495  shca->ib_device.reg_phys_mr = ehca_reg_phys_mr;
496  shca->ib_device.reg_user_mr = ehca_reg_user_mr;
497  shca->ib_device.query_mr = ehca_query_mr;
498  shca->ib_device.dereg_mr = ehca_dereg_mr;
499  shca->ib_device.rereg_phys_mr = ehca_rereg_phys_mr;
500  shca->ib_device.alloc_mw = ehca_alloc_mw;
501  shca->ib_device.bind_mw = ehca_bind_mw;
502  shca->ib_device.dealloc_mw = ehca_dealloc_mw;
503  shca->ib_device.alloc_fmr = ehca_alloc_fmr;
504  shca->ib_device.map_phys_fmr = ehca_map_phys_fmr;
505  shca->ib_device.unmap_fmr = ehca_unmap_fmr;
506  shca->ib_device.dealloc_fmr = ehca_dealloc_fmr;
507  shca->ib_device.attach_mcast = ehca_attach_mcast;
508  shca->ib_device.detach_mcast = ehca_detach_mcast;
509  shca->ib_device.process_mad = ehca_process_mad;
510  shca->ib_device.mmap = ehca_mmap;
511  shca->ib_device.dma_ops = &ehca_dma_mapping_ops;
512 
513  if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
514  shca->ib_device.uverbs_cmd_mask |=
515  (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
516  (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
517  (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
518  (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
519 
520  shca->ib_device.create_srq = ehca_create_srq;
521  shca->ib_device.modify_srq = ehca_modify_srq;
522  shca->ib_device.query_srq = ehca_query_srq;
523  shca->ib_device.destroy_srq = ehca_destroy_srq;
524  shca->ib_device.post_srq_recv = ehca_post_srq_recv;
525  }
526 
527  return ret;
528 }
529 
530 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
531 {
532  struct ehca_sport *sport = &shca->sport[port - 1];
533  struct ib_cq *ibcq;
534  struct ib_qp *ibqp;
535  struct ib_qp_init_attr qp_init_attr;
536  int ret;
537 
538  if (sport->ibcq_aqp1) {
539  ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
540  return -EPERM;
541  }
542 
543  ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void *)(-1), 10, 0);
544  if (IS_ERR(ibcq)) {
545  ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
546  return PTR_ERR(ibcq);
547  }
548  sport->ibcq_aqp1 = ibcq;
549 
550  if (sport->ibqp_sqp[IB_QPT_GSI]) {
551  ehca_err(&shca->ib_device, "AQP1 QP is already created.");
552  ret = -EPERM;
553  goto create_aqp1;
554  }
555 
556  memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
557  qp_init_attr.send_cq = ibcq;
558  qp_init_attr.recv_cq = ibcq;
559  qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
560  qp_init_attr.cap.max_send_wr = 100;
561  qp_init_attr.cap.max_recv_wr = 100;
562  qp_init_attr.cap.max_send_sge = 2;
563  qp_init_attr.cap.max_recv_sge = 1;
564  qp_init_attr.qp_type = IB_QPT_GSI;
565  qp_init_attr.port_num = port;
566  qp_init_attr.qp_context = NULL;
567  qp_init_attr.event_handler = NULL;
568  qp_init_attr.srq = NULL;
569 
570  ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
571  if (IS_ERR(ibqp)) {
572  ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
573  ret = PTR_ERR(ibqp);
574  goto create_aqp1;
575  }
576  sport->ibqp_sqp[IB_QPT_GSI] = ibqp;
577 
578  return 0;
579 
580 create_aqp1:
581  ib_destroy_cq(sport->ibcq_aqp1);
582  return ret;
583 }
584 
585 static int ehca_destroy_aqp1(struct ehca_sport *sport)
586 {
587  int ret;
588 
589  ret = ib_destroy_qp(sport->ibqp_sqp[IB_QPT_GSI]);
590  if (ret) {
591  ehca_gen_err("Cannot destroy AQP1 QP. ret=%i", ret);
592  return ret;
593  }
594 
595  ret = ib_destroy_cq(sport->ibcq_aqp1);
596  if (ret)
597  ehca_gen_err("Cannot destroy AQP1 CQ. ret=%i", ret);
598 
599  return ret;
600 }
601 
602 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
603 {
604  return snprintf(buf, PAGE_SIZE, "%d\n", ehca_debug_level);
605 }
606 
607 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
608  const char *buf, size_t count)
609 {
610  int value = (*buf) - '0';
611  if (value >= 0 && value <= 9)
612  ehca_debug_level = value;
613  return 1;
614 }
615 
616 static DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
617  ehca_show_debug_level, ehca_store_debug_level);
618 
619 static struct attribute *ehca_drv_attrs[] = {
620  &driver_attr_debug_level.attr,
621  NULL
622 };
623 
624 static struct attribute_group ehca_drv_attr_grp = {
625  .attrs = ehca_drv_attrs
626 };
627 
628 static const struct attribute_group *ehca_drv_attr_groups[] = {
629  &ehca_drv_attr_grp,
630  NULL,
631 };
632 
633 #define EHCA_RESOURCE_ATTR(name) \
634 static ssize_t ehca_show_##name(struct device *dev, \
635  struct device_attribute *attr, \
636  char *buf) \
637 { \
638  struct ehca_shca *shca; \
639  struct hipz_query_hca *rblock; \
640  int data; \
641  \
642  shca = dev_get_drvdata(dev); \
643  \
644  rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL); \
645  if (!rblock) { \
646  dev_err(dev, "Can't allocate rblock memory.\n"); \
647  return 0; \
648  } \
649  \
650  if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
651  dev_err(dev, "Can't query device properties\n"); \
652  ehca_free_fw_ctrlblock(rblock); \
653  return 0; \
654  } \
655  \
656  data = rblock->name; \
657  ehca_free_fw_ctrlblock(rblock); \
658  \
659  if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1)) \
660  return snprintf(buf, 256, "1\n"); \
661  else \
662  return snprintf(buf, 256, "%d\n", data); \
663  \
664 } \
665 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
666 
667 EHCA_RESOURCE_ATTR(num_ports);
668 EHCA_RESOURCE_ATTR(hw_ver);
669 EHCA_RESOURCE_ATTR(max_eq);
670 EHCA_RESOURCE_ATTR(cur_eq);
671 EHCA_RESOURCE_ATTR(max_cq);
672 EHCA_RESOURCE_ATTR(cur_cq);
673 EHCA_RESOURCE_ATTR(max_qp);
674 EHCA_RESOURCE_ATTR(cur_qp);
675 EHCA_RESOURCE_ATTR(max_mr);
676 EHCA_RESOURCE_ATTR(cur_mr);
677 EHCA_RESOURCE_ATTR(max_mw);
678 EHCA_RESOURCE_ATTR(cur_mw);
679 EHCA_RESOURCE_ATTR(max_pd);
680 EHCA_RESOURCE_ATTR(max_ah);
681 
682 static ssize_t ehca_show_adapter_handle(struct device *dev,
683  struct device_attribute *attr,
684  char *buf)
685 {
686  struct ehca_shca *shca = dev_get_drvdata(dev);
687 
688  return sprintf(buf, "%llx\n", shca->ipz_hca_handle.handle);
689 
690 }
691 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
692 
693 static struct attribute *ehca_dev_attrs[] = {
694  &dev_attr_adapter_handle.attr,
695  &dev_attr_num_ports.attr,
696  &dev_attr_hw_ver.attr,
697  &dev_attr_max_eq.attr,
698  &dev_attr_cur_eq.attr,
699  &dev_attr_max_cq.attr,
700  &dev_attr_cur_cq.attr,
701  &dev_attr_max_qp.attr,
702  &dev_attr_cur_qp.attr,
703  &dev_attr_max_mr.attr,
704  &dev_attr_cur_mr.attr,
705  &dev_attr_max_mw.attr,
706  &dev_attr_cur_mw.attr,
707  &dev_attr_max_pd.attr,
708  &dev_attr_max_ah.attr,
709  NULL
710 };
711 
712 static struct attribute_group ehca_dev_attr_grp = {
713  .attrs = ehca_dev_attrs
714 };
715 
716 static int __devinit ehca_probe(struct platform_device *dev,
717  const struct of_device_id *id)
718 {
719  struct ehca_shca *shca;
720  const u64 *handle;
721  struct ib_pd *ibpd;
722  int ret, i, eq_size;
723  unsigned long flags;
724 
725  handle = of_get_property(dev->dev.of_node, "ibm,hca-handle", NULL);
726  if (!handle) {
727  ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
728  dev->dev.of_node->full_name);
729  return -ENODEV;
730  }
731 
732  if (!(*handle)) {
733  ehca_gen_err("Wrong eHCA handle for adapter: %s.",
734  dev->dev.of_node->full_name);
735  return -ENODEV;
736  }
737 
738  shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
739  if (!shca) {
740  ehca_gen_err("Cannot allocate shca memory.");
741  return -ENOMEM;
742  }
743 
744  mutex_init(&shca->modify_mutex);
745  atomic_set(&shca->num_cqs, 0);
746  atomic_set(&shca->num_qps, 0);
747  shca->max_num_qps = ehca_max_qp;
748  shca->max_num_cqs = ehca_max_cq;
749 
750  for (i = 0; i < ARRAY_SIZE(shca->sport); i++)
751  spin_lock_init(&shca->sport[i].mod_sqp_lock);
752 
753  shca->ofdev = dev;
754  shca->ipz_hca_handle.handle = *handle;
755  dev_set_drvdata(&dev->dev, shca);
756 
757  ret = ehca_sense_attributes(shca);
758  if (ret < 0) {
759  ehca_gen_err("Cannot sense eHCA attributes.");
760  goto probe1;
761  }
762 
763  ret = ehca_init_device(shca);
764  if (ret) {
765  ehca_gen_err("Cannot init ehca device struct");
766  goto probe1;
767  }
768 
769  eq_size = 2 * shca->max_num_cqs + 4 * shca->max_num_qps;
770  /* create event queues */
771  ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, eq_size);
772  if (ret) {
773  ehca_err(&shca->ib_device, "Cannot create EQ.");
774  goto probe1;
775  }
776 
777  ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
778  if (ret) {
779  ehca_err(&shca->ib_device, "Cannot create NEQ.");
780  goto probe3;
781  }
782 
783  /* create internal protection domain */
784  ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL);
785  if (IS_ERR(ibpd)) {
786  ehca_err(&shca->ib_device, "Cannot create internal PD.");
787  ret = PTR_ERR(ibpd);
788  goto probe4;
789  }
790 
791  shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
792  shca->pd->ib_pd.device = &shca->ib_device;
793 
794  /* create internal max MR */
795  ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
796 
797  if (ret) {
798  ehca_err(&shca->ib_device, "Cannot create internal MR ret=%i",
799  ret);
800  goto probe5;
801  }
802 
803  ret = ib_register_device(&shca->ib_device, NULL);
804  if (ret) {
805  ehca_err(&shca->ib_device,
806  "ib_register_device() failed ret=%i", ret);
807  goto probe6;
808  }
809 
810  /* create AQP1 for port 1 */
811  if (ehca_open_aqp1 == 1) {
812  shca->sport[0].port_state = IB_PORT_DOWN;
813  ret = ehca_create_aqp1(shca, 1);
814  if (ret) {
815  ehca_err(&shca->ib_device,
816  "Cannot create AQP1 for port 1.");
817  goto probe7;
818  }
819  }
820 
821  /* create AQP1 for port 2 */
822  if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
823  shca->sport[1].port_state = IB_PORT_DOWN;
824  ret = ehca_create_aqp1(shca, 2);
825  if (ret) {
826  ehca_err(&shca->ib_device,
827  "Cannot create AQP1 for port 2.");
828  goto probe8;
829  }
830  }
831 
832  ret = sysfs_create_group(&dev->dev.kobj, &ehca_dev_attr_grp);
833  if (ret) /* only complain; we can live without attributes */
834  ehca_err(&shca->ib_device,
835  "Cannot create device attributes ret=%d", ret);
836 
837  spin_lock_irqsave(&shca_list_lock, flags);
838  list_add(&shca->shca_list, &shca_list);
839  spin_unlock_irqrestore(&shca_list_lock, flags);
840 
841  return 0;
842 
843 probe8:
844  ret = ehca_destroy_aqp1(&shca->sport[0]);
845  if (ret)
846  ehca_err(&shca->ib_device,
847  "Cannot destroy AQP1 for port 1. ret=%i", ret);
848 
849 probe7:
850  ib_unregister_device(&shca->ib_device);
851 
852 probe6:
853  ret = ehca_dereg_internal_maxmr(shca);
854  if (ret)
855  ehca_err(&shca->ib_device,
856  "Cannot destroy internal MR. ret=%x", ret);
857 
858 probe5:
859  ret = ehca_dealloc_pd(&shca->pd->ib_pd);
860  if (ret)
861  ehca_err(&shca->ib_device,
862  "Cannot destroy internal PD. ret=%x", ret);
863 
864 probe4:
865  ret = ehca_destroy_eq(shca, &shca->neq);
866  if (ret)
867  ehca_err(&shca->ib_device,
868  "Cannot destroy NEQ. ret=%x", ret);
869 
870 probe3:
871  ret = ehca_destroy_eq(shca, &shca->eq);
872  if (ret)
873  ehca_err(&shca->ib_device,
874  "Cannot destroy EQ. ret=%x", ret);
875 
876 probe1:
877  ib_dealloc_device(&shca->ib_device);
878 
879  return -EINVAL;
880 }
881 
882 static int __devexit ehca_remove(struct platform_device *dev)
883 {
884  struct ehca_shca *shca = dev_get_drvdata(&dev->dev);
885  unsigned long flags;
886  int ret;
887 
888  sysfs_remove_group(&dev->dev.kobj, &ehca_dev_attr_grp);
889 
890  if (ehca_open_aqp1 == 1) {
891  int i;
892  for (i = 0; i < shca->num_ports; i++) {
893  ret = ehca_destroy_aqp1(&shca->sport[i]);
894  if (ret)
895  ehca_err(&shca->ib_device,
896  "Cannot destroy AQP1 for port %x "
897  "ret=%i", ret, i);
898  }
899  }
900 
901  ib_unregister_device(&shca->ib_device);
902 
903  ret = ehca_dereg_internal_maxmr(shca);
904  if (ret)
905  ehca_err(&shca->ib_device,
906  "Cannot destroy internal MR. ret=%i", ret);
907 
908  ret = ehca_dealloc_pd(&shca->pd->ib_pd);
909  if (ret)
910  ehca_err(&shca->ib_device,
911  "Cannot destroy internal PD. ret=%i", ret);
912 
913  ret = ehca_destroy_eq(shca, &shca->eq);
914  if (ret)
915  ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%i", ret);
916 
917  ret = ehca_destroy_eq(shca, &shca->neq);
918  if (ret)
919  ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%i", ret);
920 
921  ib_dealloc_device(&shca->ib_device);
922 
923  spin_lock_irqsave(&shca_list_lock, flags);
924  list_del(&shca->shca_list);
925  spin_unlock_irqrestore(&shca_list_lock, flags);
926 
927  return ret;
928 }
929 
930 static struct of_device_id ehca_device_table[] =
931 {
932  {
933  .name = "lhca",
934  .compatible = "IBM,lhca",
935  },
936  {},
937 };
938 MODULE_DEVICE_TABLE(of, ehca_device_table);
939 
940 static struct of_platform_driver ehca_driver = {
941  .probe = ehca_probe,
942  .remove = ehca_remove,
943  .driver = {
944  .name = "ehca",
945  .owner = THIS_MODULE,
946  .groups = ehca_drv_attr_groups,
947  .of_match_table = ehca_device_table,
948  },
949 };
950 
951 void ehca_poll_eqs(unsigned long data)
952 {
953  struct ehca_shca *shca;
954 
955  spin_lock(&shca_list_lock);
956  list_for_each_entry(shca, &shca_list, shca_list) {
957  if (shca->eq.is_initialized) {
958  /* call deadman proc only if eq ptr does not change */
959  struct ehca_eq *eq = &shca->eq;
960  int max = 3;
961  volatile u64 q_ofs, q_ofs2;
962  unsigned long flags;
963  spin_lock_irqsave(&eq->spinlock, flags);
964  q_ofs = eq->ipz_queue.current_q_offset;
965  spin_unlock_irqrestore(&eq->spinlock, flags);
966  do {
967  spin_lock_irqsave(&eq->spinlock, flags);
968  q_ofs2 = eq->ipz_queue.current_q_offset;
969  spin_unlock_irqrestore(&eq->spinlock, flags);
970  max--;
971  } while (q_ofs == q_ofs2 && max > 0);
972  if (q_ofs == q_ofs2)
973  ehca_process_eq(shca, 0);
974  }
975  }
976  mod_timer(&poll_eqs_timer, round_jiffies(jiffies + HZ));
977  spin_unlock(&shca_list_lock);
978 }
979 
980 static int ehca_mem_notifier(struct notifier_block *nb,
981  unsigned long action, void *data)
982 {
983  static unsigned long ehca_dmem_warn_time;
984  unsigned long flags;
985 
986  switch (action) {
987  case MEM_CANCEL_OFFLINE:
988  case MEM_CANCEL_ONLINE:
989  case MEM_ONLINE:
990  case MEM_OFFLINE:
991  return NOTIFY_OK;
992  case MEM_GOING_ONLINE:
993  case MEM_GOING_OFFLINE:
994  /* only ok if no hca is attached to the lpar */
995  spin_lock_irqsave(&shca_list_lock, flags);
996  if (list_empty(&shca_list)) {
997  spin_unlock_irqrestore(&shca_list_lock, flags);
998  return NOTIFY_OK;
999  } else {
1000  spin_unlock_irqrestore(&shca_list_lock, flags);
1001  if (printk_timed_ratelimit(&ehca_dmem_warn_time,
1002  30 * 1000))
1003  ehca_gen_err("DMEM operations are not allowed"
1004  "in conjunction with eHCA");
1005  return NOTIFY_BAD;
1006  }
1007  }
1008  return NOTIFY_OK;
1009 }
1010 
1011 static struct notifier_block ehca_mem_nb = {
1012  .notifier_call = ehca_mem_notifier,
1013 };
1014 
1015 static int __init ehca_module_init(void)
1016 {
1017  int ret;
1018 
1019  printk(KERN_INFO "eHCA Infiniband Device Driver "
1020  "(Version " HCAD_VERSION ")\n");
1021 
1022  ret = ehca_create_comp_pool();
1023  if (ret) {
1024  ehca_gen_err("Cannot create comp pool.");
1025  return ret;
1026  }
1027 
1028  ret = ehca_create_slab_caches();
1029  if (ret) {
1030  ehca_gen_err("Cannot create SLAB caches");
1031  ret = -ENOMEM;
1032  goto module_init1;
1033  }
1034 
1035  ret = ehca_create_busmap();
1036  if (ret) {
1037  ehca_gen_err("Cannot create busmap.");
1038  goto module_init2;
1039  }
1040 
1041  ret = ibmebus_register_driver(&ehca_driver);
1042  if (ret) {
1043  ehca_gen_err("Cannot register eHCA device driver");
1044  ret = -EINVAL;
1045  goto module_init3;
1046  }
1047 
1048  ret = register_memory_notifier(&ehca_mem_nb);
1049  if (ret) {
1050  ehca_gen_err("Failed registering memory add/remove notifier");
1051  goto module_init4;
1052  }
1053 
1054  if (ehca_poll_all_eqs != 1) {
1055  ehca_gen_err("WARNING!!!");
1056  ehca_gen_err("It is possible to lose interrupts.");
1057  } else {
1058  init_timer(&poll_eqs_timer);
1059  poll_eqs_timer.function = ehca_poll_eqs;
1060  poll_eqs_timer.expires = jiffies + HZ;
1061  add_timer(&poll_eqs_timer);
1062  }
1063 
1064  return 0;
1065 
1066 module_init4:
1067  ibmebus_unregister_driver(&ehca_driver);
1068 
1069 module_init3:
1070  ehca_destroy_busmap();
1071 
1072 module_init2:
1073  ehca_destroy_slab_caches();
1074 
1075 module_init1:
1076  ehca_destroy_comp_pool();
1077  return ret;
1078 };
1079 
1080 static void __exit ehca_module_exit(void)
1081 {
1082  if (ehca_poll_all_eqs == 1)
1083  del_timer_sync(&poll_eqs_timer);
1084 
1085  ibmebus_unregister_driver(&ehca_driver);
1086 
1087  unregister_memory_notifier(&ehca_mem_nb);
1088 
1089  ehca_destroy_busmap();
1090 
1091  ehca_destroy_slab_caches();
1092 
1093  ehca_destroy_comp_pool();
1094 
1095  idr_destroy(&ehca_cq_idr);
1096  idr_destroy(&ehca_qp_idr);
1097 };
1098 
1099 module_init(ehca_module_init);
1100 module_exit(ehca_module_exit);
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