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Staging: zram: fix up some sysfs attribute permissions
[zen-stable.git] / drivers / infiniband / hw / mlx4 / main.c
blobbf3e20cd029859f2beb23e962fa2640e30faf44c
1 /*
2 * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 */
33
34 #include <linux/module.h>
35 #include <linux/init.h>
36 #include <linux/slab.h>
37 #include <linux/errno.h>
38 #include <linux/netdevice.h>
39 #include <linux/inetdevice.h>
40 #include <linux/rtnetlink.h>
41 #include <linux/if_vlan.h>
42
43 #include <rdma/ib_smi.h>
44 #include <rdma/ib_user_verbs.h>
45 #include <rdma/ib_addr.h>
46
47 #include <linux/mlx4/driver.h>
48 #include <linux/mlx4/cmd.h>
49
50 #include "mlx4_ib.h"
51 #include "user.h"
52
53 #define DRV_NAME "mlx4_ib"
54 #define DRV_VERSION "1.0"
55 #define DRV_RELDATE "April 4, 2008"
56
57 MODULE_AUTHOR("Roland Dreier");
58 MODULE_DESCRIPTION("Mellanox ConnectX HCA InfiniBand driver");
59 MODULE_LICENSE("Dual BSD/GPL");
60 MODULE_VERSION(DRV_VERSION);
61
62 static const char mlx4_ib_version[] =
63 DRV_NAME ": Mellanox ConnectX InfiniBand driver v"
64 DRV_VERSION " (" DRV_RELDATE ")\n";
65
66 struct update_gid_work {
67 struct work_struct work;
68 union ib_gid gids[128];
69 struct mlx4_ib_dev *dev;
70 int port;
71 };
72
73 static struct workqueue_struct *wq;
74
75 static void init_query_mad(struct ib_smp *mad)
76 {
77 mad->base_version = 1;
78 mad->mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED;
79 mad->class_version = 1;
80 mad->method = IB_MGMT_METHOD_GET;
81 }
82
83 static union ib_gid zgid;
84
85 static int mlx4_ib_query_device(struct ib_device *ibdev,
86 struct ib_device_attr *props)
87 {
88 struct mlx4_ib_dev *dev = to_mdev(ibdev);
89 struct ib_smp *in_mad = NULL;
90 struct ib_smp *out_mad = NULL;
91 int err = -ENOMEM;
92
93 in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL);
94 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
95 if (!in_mad || !out_mad)
96 goto out;
97
98 init_query_mad(in_mad);
99 in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
100
101 err = mlx4_MAD_IFC(to_mdev(ibdev), 1, 1, 1, NULL, NULL, in_mad, out_mad);
102 if (err)
103 goto out;
104
105 memset(props, 0, sizeof *props);
106
107 props->fw_ver = dev->dev->caps.fw_ver;
108 props->device_cap_flags = IB_DEVICE_CHANGE_PHY_PORT |
109 IB_DEVICE_PORT_ACTIVE_EVENT |
110 IB_DEVICE_SYS_IMAGE_GUID |
111 IB_DEVICE_RC_RNR_NAK_GEN |
112 IB_DEVICE_BLOCK_MULTICAST_LOOPBACK;
113 if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_BAD_PKEY_CNTR)
114 props->device_cap_flags |= IB_DEVICE_BAD_PKEY_CNTR;
115 if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_BAD_QKEY_CNTR)
116 props->device_cap_flags |= IB_DEVICE_BAD_QKEY_CNTR;
117 if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_APM)
118 props->device_cap_flags |= IB_DEVICE_AUTO_PATH_MIG;
119 if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_UD_AV_PORT)
120 props->device_cap_flags |= IB_DEVICE_UD_AV_PORT_ENFORCE;
121 if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_IPOIB_CSUM)
122 props->device_cap_flags |= IB_DEVICE_UD_IP_CSUM;
123 if (dev->dev->caps.max_gso_sz && dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_BLH)
124 props->device_cap_flags |= IB_DEVICE_UD_TSO;
125 if (dev->dev->caps.bmme_flags & MLX4_BMME_FLAG_RESERVED_LKEY)
126 props->device_cap_flags |= IB_DEVICE_LOCAL_DMA_LKEY;
127 if ((dev->dev->caps.bmme_flags & MLX4_BMME_FLAG_LOCAL_INV) &&
128 (dev->dev->caps.bmme_flags & MLX4_BMME_FLAG_REMOTE_INV) &&
129 (dev->dev->caps.bmme_flags & MLX4_BMME_FLAG_FAST_REG_WR))
130 props->device_cap_flags |= IB_DEVICE_MEM_MGT_EXTENSIONS;
131
132 props->vendor_id = be32_to_cpup((__be32 *) (out_mad->data + 36)) &
133 0xffffff;
134 props->vendor_part_id = be16_to_cpup((__be16 *) (out_mad->data + 30));
135 props->hw_ver = be32_to_cpup((__be32 *) (out_mad->data + 32));
136 memcpy(&props->sys_image_guid, out_mad->data + 4, 8);
137
138 props->max_mr_size = ~0ull;
139 props->page_size_cap = dev->dev->caps.page_size_cap;
140 props->max_qp = dev->dev->caps.num_qps - dev->dev->caps.reserved_qps;
141 props->max_qp_wr = dev->dev->caps.max_wqes;
142 props->max_sge = min(dev->dev->caps.max_sq_sg,
143 dev->dev->caps.max_rq_sg);
144 props->max_cq = dev->dev->caps.num_cqs - dev->dev->caps.reserved_cqs;
145 props->max_cqe = dev->dev->caps.max_cqes;
146 props->max_mr = dev->dev->caps.num_mpts - dev->dev->caps.reserved_mrws;
147 props->max_pd = dev->dev->caps.num_pds - dev->dev->caps.reserved_pds;
148 props->max_qp_rd_atom = dev->dev->caps.max_qp_dest_rdma;
149 props->max_qp_init_rd_atom = dev->dev->caps.max_qp_init_rdma;
150 props->max_res_rd_atom = props->max_qp_rd_atom * props->max_qp;
151 props->max_srq = dev->dev->caps.num_srqs - dev->dev->caps.reserved_srqs;
152 props->max_srq_wr = dev->dev->caps.max_srq_wqes - 1;
153 props->max_srq_sge = dev->dev->caps.max_srq_sge;
154 props->max_fast_reg_page_list_len = MLX4_MAX_FAST_REG_PAGES;
155 props->local_ca_ack_delay = dev->dev->caps.local_ca_ack_delay;
156 props->atomic_cap = dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_ATOMIC ?
157 IB_ATOMIC_HCA : IB_ATOMIC_NONE;
158 props->masked_atomic_cap = IB_ATOMIC_HCA;
159 props->max_pkeys = dev->dev->caps.pkey_table_len[1];
160 props->max_mcast_grp = dev->dev->caps.num_mgms + dev->dev->caps.num_amgms;
161 props->max_mcast_qp_attach = dev->dev->caps.num_qp_per_mgm;
162 props->max_total_mcast_qp_attach = props->max_mcast_qp_attach *
163 props->max_mcast_grp;
164 props->max_map_per_fmr = (1 << (32 - ilog2(dev->dev->caps.num_mpts))) - 1;
165
166 out:
167 kfree(in_mad);
168 kfree(out_mad);
169
170 return err;
171 }
172
173 static enum rdma_link_layer
174 mlx4_ib_port_link_layer(struct ib_device *device, u8 port_num)
175 {
176 struct mlx4_dev *dev = to_mdev(device)->dev;
177
178 return dev->caps.port_mask & (1 << (port_num - 1)) ?
179 IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET;
180 }
181
182 static int ib_link_query_port(struct ib_device *ibdev, u8 port,
183 struct ib_port_attr *props,
184 struct ib_smp *out_mad)
185 {
186 props->lid = be16_to_cpup((__be16 *) (out_mad->data + 16));
187 props->lmc = out_mad->data[34] & 0x7;
188 props->sm_lid = be16_to_cpup((__be16 *) (out_mad->data + 18));
189 props->sm_sl = out_mad->data[36] & 0xf;
190 props->state = out_mad->data[32] & 0xf;
191 props->phys_state = out_mad->data[33] >> 4;
192 props->port_cap_flags = be32_to_cpup((__be32 *) (out_mad->data + 20));
193 props->gid_tbl_len = to_mdev(ibdev)->dev->caps.gid_table_len[port];
194 props->max_msg_sz = to_mdev(ibdev)->dev->caps.max_msg_sz;
195 props->pkey_tbl_len = to_mdev(ibdev)->dev->caps.pkey_table_len[port];
196 props->bad_pkey_cntr = be16_to_cpup((__be16 *) (out_mad->data + 46));
197 props->qkey_viol_cntr = be16_to_cpup((__be16 *) (out_mad->data + 48));
198 props->active_width = out_mad->data[31] & 0xf;
199 props->active_speed = out_mad->data[35] >> 4;
200 props->max_mtu = out_mad->data[41] & 0xf;
201 props->active_mtu = out_mad->data[36] >> 4;
202 props->subnet_timeout = out_mad->data[51] & 0x1f;
203 props->max_vl_num = out_mad->data[37] >> 4;
204 props->init_type_reply = out_mad->data[41] >> 4;
205
206 return 0;
207 }
208
209 static u8 state_to_phys_state(enum ib_port_state state)
210 {
211 return state == IB_PORT_ACTIVE ? 5 : 3;
212 }
213
214 static int eth_link_query_port(struct ib_device *ibdev, u8 port,
215 struct ib_port_attr *props,
216 struct ib_smp *out_mad)
217 {
218 struct mlx4_ib_iboe *iboe = &to_mdev(ibdev)->iboe;
219 struct net_device *ndev;
220 enum ib_mtu tmp;
221
222 props->active_width = IB_WIDTH_4X;
223 props->active_speed = 4;
224 props->port_cap_flags = IB_PORT_CM_SUP;
225 props->gid_tbl_len = to_mdev(ibdev)->dev->caps.gid_table_len[port];
226 props->max_msg_sz = to_mdev(ibdev)->dev->caps.max_msg_sz;
227 props->pkey_tbl_len = 1;
228 props->bad_pkey_cntr = be16_to_cpup((__be16 *) (out_mad->data + 46));
229 props->qkey_viol_cntr = be16_to_cpup((__be16 *) (out_mad->data + 48));
230 props->max_mtu = IB_MTU_2048;
231 props->subnet_timeout = 0;
232 props->max_vl_num = out_mad->data[37] >> 4;
233 props->init_type_reply = 0;
234 props->state = IB_PORT_DOWN;
235 props->phys_state = state_to_phys_state(props->state);
236 props->active_mtu = IB_MTU_256;
237 spin_lock(&iboe->lock);
238 ndev = iboe->netdevs[port - 1];
239 if (!ndev)
240 goto out;
241
242 tmp = iboe_get_mtu(ndev->mtu);
243 props->active_mtu = tmp ? min(props->max_mtu, tmp) : IB_MTU_256;
244
245 props->state = netif_running(ndev) && netif_oper_up(ndev) ?
246 IB_PORT_ACTIVE : IB_PORT_DOWN;
247 props->phys_state = state_to_phys_state(props->state);
248
249 out:
250 spin_unlock(&iboe->lock);
251 return 0;
252 }
253
254 static int mlx4_ib_query_port(struct ib_device *ibdev, u8 port,
255 struct ib_port_attr *props)
256 {
257 struct ib_smp *in_mad = NULL;
258 struct ib_smp *out_mad = NULL;
259 int err = -ENOMEM;
260
261 in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL);
262 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
263 if (!in_mad || !out_mad)
264 goto out;
265
266 memset(props, 0, sizeof *props);
267
268 init_query_mad(in_mad);
269 in_mad->attr_id = IB_SMP_ATTR_PORT_INFO;
270 in_mad->attr_mod = cpu_to_be32(port);
271
272 err = mlx4_MAD_IFC(to_mdev(ibdev), 1, 1, port, NULL, NULL, in_mad, out_mad);
273 if (err)
274 goto out;
275
276 err = mlx4_ib_port_link_layer(ibdev, port) == IB_LINK_LAYER_INFINIBAND ?
277 ib_link_query_port(ibdev, port, props, out_mad) :
278 eth_link_query_port(ibdev, port, props, out_mad);
279
280 out:
281 kfree(in_mad);
282 kfree(out_mad);
283
284 return err;
285 }
286
287 static int __mlx4_ib_query_gid(struct ib_device *ibdev, u8 port, int index,
288 union ib_gid *gid)
289 {
290 struct ib_smp *in_mad = NULL;
291 struct ib_smp *out_mad = NULL;
292 int err = -ENOMEM;
293
294 in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL);
295 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
296 if (!in_mad || !out_mad)
297 goto out;
298
299 init_query_mad(in_mad);
300 in_mad->attr_id = IB_SMP_ATTR_PORT_INFO;
301 in_mad->attr_mod = cpu_to_be32(port);
302
303 err = mlx4_MAD_IFC(to_mdev(ibdev), 1, 1, port, NULL, NULL, in_mad, out_mad);
304 if (err)
305 goto out;
306
307 memcpy(gid->raw, out_mad->data + 8, 8);
308
309 init_query_mad(in_mad);
310 in_mad->attr_id = IB_SMP_ATTR_GUID_INFO;
311 in_mad->attr_mod = cpu_to_be32(index / 8);
312
313 err = mlx4_MAD_IFC(to_mdev(ibdev), 1, 1, port, NULL, NULL, in_mad, out_mad);
314 if (err)
315 goto out;
316
317 memcpy(gid->raw + 8, out_mad->data + (index % 8) * 8, 8);
318
319 out:
320 kfree(in_mad);
321 kfree(out_mad);
322 return err;
323 }
324
325 static int iboe_query_gid(struct ib_device *ibdev, u8 port, int index,
326 union ib_gid *gid)
327 {
328 struct mlx4_ib_dev *dev = to_mdev(ibdev);
329
330 *gid = dev->iboe.gid_table[port - 1][index];
331
332 return 0;
333 }
334
335 static int mlx4_ib_query_gid(struct ib_device *ibdev, u8 port, int index,
336 union ib_gid *gid)
337 {
338 if (rdma_port_get_link_layer(ibdev, port) == IB_LINK_LAYER_INFINIBAND)
339 return __mlx4_ib_query_gid(ibdev, port, index, gid);
340 else
341 return iboe_query_gid(ibdev, port, index, gid);
342 }
343
344 static int mlx4_ib_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
345 u16 *pkey)
346 {
347 struct ib_smp *in_mad = NULL;
348 struct ib_smp *out_mad = NULL;
349 int err = -ENOMEM;
350
351 in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL);
352 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
353 if (!in_mad || !out_mad)
354 goto out;
355
356 init_query_mad(in_mad);
357 in_mad->attr_id = IB_SMP_ATTR_PKEY_TABLE;
358 in_mad->attr_mod = cpu_to_be32(index / 32);
359
360 err = mlx4_MAD_IFC(to_mdev(ibdev), 1, 1, port, NULL, NULL, in_mad, out_mad);
361 if (err)
362 goto out;
363
364 *pkey = be16_to_cpu(((__be16 *) out_mad->data)[index % 32]);
365
366 out:
367 kfree(in_mad);
368 kfree(out_mad);
369 return err;
370 }
371
372 static int mlx4_ib_modify_device(struct ib_device *ibdev, int mask,
373 struct ib_device_modify *props)
374 {
375 struct mlx4_cmd_mailbox *mailbox;
376
377 if (mask & ~IB_DEVICE_MODIFY_NODE_DESC)
378 return -EOPNOTSUPP;
379
380 if (!(mask & IB_DEVICE_MODIFY_NODE_DESC))
381 return 0;
382
383 spin_lock(&to_mdev(ibdev)->sm_lock);
384 memcpy(ibdev->node_desc, props->node_desc, 64);
385 spin_unlock(&to_mdev(ibdev)->sm_lock);
386
387 /*
388 * If possible, pass node desc to FW, so it can generate
389 * a 144 trap. If cmd fails, just ignore.
390 */
391 mailbox = mlx4_alloc_cmd_mailbox(to_mdev(ibdev)->dev);
392 if (IS_ERR(mailbox))
393 return 0;
394
395 memset(mailbox->buf, 0, 256);
396 memcpy(mailbox->buf, props->node_desc, 64);
397 mlx4_cmd(to_mdev(ibdev)->dev, mailbox->dma, 1, 0,
398 MLX4_CMD_SET_NODE, MLX4_CMD_TIME_CLASS_A);
399
400 mlx4_free_cmd_mailbox(to_mdev(ibdev)->dev, mailbox);
401
402 return 0;
403 }
404
405 static int mlx4_SET_PORT(struct mlx4_ib_dev *dev, u8 port, int reset_qkey_viols,
406 u32 cap_mask)
407 {
408 struct mlx4_cmd_mailbox *mailbox;
409 int err;
410 u8 is_eth = dev->dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH;
411
412 mailbox = mlx4_alloc_cmd_mailbox(dev->dev);
413 if (IS_ERR(mailbox))
414 return PTR_ERR(mailbox);
415
416 memset(mailbox->buf, 0, 256);
417
418 if (dev->dev->flags & MLX4_FLAG_OLD_PORT_CMDS) {
419 *(u8 *) mailbox->buf = !!reset_qkey_viols << 6;
420 ((__be32 *) mailbox->buf)[2] = cpu_to_be32(cap_mask);
421 } else {
422 ((u8 *) mailbox->buf)[3] = !!reset_qkey_viols;
423 ((__be32 *) mailbox->buf)[1] = cpu_to_be32(cap_mask);
424 }
425
426 err = mlx4_cmd(dev->dev, mailbox->dma, port, is_eth, MLX4_CMD_SET_PORT,
427 MLX4_CMD_TIME_CLASS_B);
428
429 mlx4_free_cmd_mailbox(dev->dev, mailbox);
430 return err;
431 }
432
433 static int mlx4_ib_modify_port(struct ib_device *ibdev, u8 port, int mask,
434 struct ib_port_modify *props)
435 {
436 struct ib_port_attr attr;
437 u32 cap_mask;
438 int err;
439
440 mutex_lock(&to_mdev(ibdev)->cap_mask_mutex);
441
442 err = mlx4_ib_query_port(ibdev, port, &attr);
443 if (err)
444 goto out;
445
446 cap_mask = (attr.port_cap_flags | props->set_port_cap_mask) &
447 ~props->clr_port_cap_mask;
448
449 err = mlx4_SET_PORT(to_mdev(ibdev), port,
450 !!(mask & IB_PORT_RESET_QKEY_CNTR),
451 cap_mask);
452
453 out:
454 mutex_unlock(&to_mdev(ibdev)->cap_mask_mutex);
455 return err;
456 }
457
458 static struct ib_ucontext *mlx4_ib_alloc_ucontext(struct ib_device *ibdev,
459 struct ib_udata *udata)
460 {
461 struct mlx4_ib_dev *dev = to_mdev(ibdev);
462 struct mlx4_ib_ucontext *context;
463 struct mlx4_ib_alloc_ucontext_resp resp;
464 int err;
465
466 if (!dev->ib_active)
467 return ERR_PTR(-EAGAIN);
468
469 resp.qp_tab_size = dev->dev->caps.num_qps;
470 resp.bf_reg_size = dev->dev->caps.bf_reg_size;
471 resp.bf_regs_per_page = dev->dev->caps.bf_regs_per_page;
472
473 context = kmalloc(sizeof *context, GFP_KERNEL);
474 if (!context)
475 return ERR_PTR(-ENOMEM);
476
477 err = mlx4_uar_alloc(to_mdev(ibdev)->dev, &context->uar);
478 if (err) {
479 kfree(context);
480 return ERR_PTR(err);
481 }
482
483 INIT_LIST_HEAD(&context->db_page_list);
484 mutex_init(&context->db_page_mutex);
485
486 err = ib_copy_to_udata(udata, &resp, sizeof resp);
487 if (err) {
488 mlx4_uar_free(to_mdev(ibdev)->dev, &context->uar);
489 kfree(context);
490 return ERR_PTR(-EFAULT);
491 }
492
493 return &context->ibucontext;
494 }
495
496 static int mlx4_ib_dealloc_ucontext(struct ib_ucontext *ibcontext)
497 {
498 struct mlx4_ib_ucontext *context = to_mucontext(ibcontext);
499
500 mlx4_uar_free(to_mdev(ibcontext->device)->dev, &context->uar);
501 kfree(context);
502
503 return 0;
504 }
505
506 static int mlx4_ib_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
507 {
508 struct mlx4_ib_dev *dev = to_mdev(context->device);
509
510 if (vma->vm_end - vma->vm_start != PAGE_SIZE)
511 return -EINVAL;
512
513 if (vma->vm_pgoff == 0) {
514 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
515
516 if (io_remap_pfn_range(vma, vma->vm_start,
517 to_mucontext(context)->uar.pfn,
518 PAGE_SIZE, vma->vm_page_prot))
519 return -EAGAIN;
520 } else if (vma->vm_pgoff == 1 && dev->dev->caps.bf_reg_size != 0) {
521 vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
522
523 if (io_remap_pfn_range(vma, vma->vm_start,
524 to_mucontext(context)->uar.pfn +
525 dev->dev->caps.num_uars,
526 PAGE_SIZE, vma->vm_page_prot))
527 return -EAGAIN;
528 } else
529 return -EINVAL;
530
531 return 0;
532 }
533
534 static struct ib_pd *mlx4_ib_alloc_pd(struct ib_device *ibdev,
535 struct ib_ucontext *context,
536 struct ib_udata *udata)
537 {
538 struct mlx4_ib_pd *pd;
539 int err;
540
541 pd = kmalloc(sizeof *pd, GFP_KERNEL);
542 if (!pd)
543 return ERR_PTR(-ENOMEM);
544
545 err = mlx4_pd_alloc(to_mdev(ibdev)->dev, &pd->pdn);
546 if (err) {
547 kfree(pd);
548 return ERR_PTR(err);
549 }
550
551 if (context)
552 if (ib_copy_to_udata(udata, &pd->pdn, sizeof (__u32))) {
553 mlx4_pd_free(to_mdev(ibdev)->dev, pd->pdn);
554 kfree(pd);
555 return ERR_PTR(-EFAULT);
556 }
557
558 return &pd->ibpd;
559 }
560
561 static int mlx4_ib_dealloc_pd(struct ib_pd *pd)
562 {
563 mlx4_pd_free(to_mdev(pd->device)->dev, to_mpd(pd)->pdn);
564 kfree(pd);
565
566 return 0;
567 }
568
569 static int add_gid_entry(struct ib_qp *ibqp, union ib_gid *gid)
570 {
571 struct mlx4_ib_qp *mqp = to_mqp(ibqp);
572 struct mlx4_ib_dev *mdev = to_mdev(ibqp->device);
573 struct mlx4_ib_gid_entry *ge;
574
575 ge = kzalloc(sizeof *ge, GFP_KERNEL);
576 if (!ge)
577 return -ENOMEM;
578
579 ge->gid = *gid;
580 if (mlx4_ib_add_mc(mdev, mqp, gid)) {
581 ge->port = mqp->port;
582 ge->added = 1;
583 }
584
585 mutex_lock(&mqp->mutex);
586 list_add_tail(&ge->list, &mqp->gid_list);
587 mutex_unlock(&mqp->mutex);
588
589 return 0;
590 }
591
592 int mlx4_ib_add_mc(struct mlx4_ib_dev *mdev, struct mlx4_ib_qp *mqp,
593 union ib_gid *gid)
594 {
595 u8 mac[6];
596 struct net_device *ndev;
597 int ret = 0;
598
599 if (!mqp->port)
600 return 0;
601
602 spin_lock(&mdev->iboe.lock);
603 ndev = mdev->iboe.netdevs[mqp->port - 1];
604 if (ndev)
605 dev_hold(ndev);
606 spin_unlock(&mdev->iboe.lock);
607
608 if (ndev) {
609 rdma_get_mcast_mac((struct in6_addr *)gid, mac);
610 rtnl_lock();
611 dev_mc_add(mdev->iboe.netdevs[mqp->port - 1], mac);
612 ret = 1;
613 rtnl_unlock();
614 dev_put(ndev);
615 }
616
617 return ret;
618 }
619
620 static int mlx4_ib_mcg_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
621 {
622 int err;
623 struct mlx4_ib_dev *mdev = to_mdev(ibqp->device);
624 struct mlx4_ib_qp *mqp = to_mqp(ibqp);
625
626 err = mlx4_multicast_attach(mdev->dev, &mqp->mqp, gid->raw, !!(mqp->flags &
627 MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK));
628 if (err)
629 return err;
630
631 err = add_gid_entry(ibqp, gid);
632 if (err)
633 goto err_add;
634
635 return 0;
636
637 err_add:
638 mlx4_multicast_detach(mdev->dev, &mqp->mqp, gid->raw);
639 return err;
640 }
641
642 static struct mlx4_ib_gid_entry *find_gid_entry(struct mlx4_ib_qp *qp, u8 *raw)
643 {
644 struct mlx4_ib_gid_entry *ge;
645 struct mlx4_ib_gid_entry *tmp;
646 struct mlx4_ib_gid_entry *ret = NULL;
647
648 list_for_each_entry_safe(ge, tmp, &qp->gid_list, list) {
649 if (!memcmp(raw, ge->gid.raw, 16)) {
650 ret = ge;
651 break;
652 }
653 }
654
655 return ret;
656 }
657
658 static int mlx4_ib_mcg_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
659 {
660 int err;
661 struct mlx4_ib_dev *mdev = to_mdev(ibqp->device);
662 struct mlx4_ib_qp *mqp = to_mqp(ibqp);
663 u8 mac[6];
664 struct net_device *ndev;
665 struct mlx4_ib_gid_entry *ge;
666
667 err = mlx4_multicast_detach(mdev->dev,
668 &mqp->mqp, gid->raw);
669 if (err)
670 return err;
671
672 mutex_lock(&mqp->mutex);
673 ge = find_gid_entry(mqp, gid->raw);
674 if (ge) {
675 spin_lock(&mdev->iboe.lock);
676 ndev = ge->added ? mdev->iboe.netdevs[ge->port - 1] : NULL;
677 if (ndev)
678 dev_hold(ndev);
679 spin_unlock(&mdev->iboe.lock);
680 rdma_get_mcast_mac((struct in6_addr *)gid, mac);
681 if (ndev) {
682 rtnl_lock();
683 dev_mc_del(mdev->iboe.netdevs[ge->port - 1], mac);
684 rtnl_unlock();
685 dev_put(ndev);
686 }
687 list_del(&ge->list);
688 kfree(ge);
689 } else
690 printk(KERN_WARNING "could not find mgid entry\n");
691
692 mutex_unlock(&mqp->mutex);
693
694 return 0;
695 }
696
697 static int init_node_data(struct mlx4_ib_dev *dev)
698 {
699 struct ib_smp *in_mad = NULL;
700 struct ib_smp *out_mad = NULL;
701 int err = -ENOMEM;
702
703 in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL);
704 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
705 if (!in_mad || !out_mad)
706 goto out;
707
708 init_query_mad(in_mad);
709 in_mad->attr_id = IB_SMP_ATTR_NODE_DESC;
710
711 err = mlx4_MAD_IFC(dev, 1, 1, 1, NULL, NULL, in_mad, out_mad);
712 if (err)
713 goto out;
714
715 memcpy(dev->ib_dev.node_desc, out_mad->data, 64);
716
717 in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
718
719 err = mlx4_MAD_IFC(dev, 1, 1, 1, NULL, NULL, in_mad, out_mad);
720 if (err)
721 goto out;
722
723 dev->dev->rev_id = be32_to_cpup((__be32 *) (out_mad->data + 32));
724 memcpy(&dev->ib_dev.node_guid, out_mad->data + 12, 8);
725
726 out:
727 kfree(in_mad);
728 kfree(out_mad);
729 return err;
730 }
731
732 static ssize_t show_hca(struct device *device, struct device_attribute *attr,
733 char *buf)
734 {
735 struct mlx4_ib_dev *dev =
736 container_of(device, struct mlx4_ib_dev, ib_dev.dev);
737 return sprintf(buf, "MT%d\n", dev->dev->pdev->device);
738 }
739
740 static ssize_t show_fw_ver(struct device *device, struct device_attribute *attr,
741 char *buf)
742 {
743 struct mlx4_ib_dev *dev =
744 container_of(device, struct mlx4_ib_dev, ib_dev.dev);
745 return sprintf(buf, "%d.%d.%d\n", (int) (dev->dev->caps.fw_ver >> 32),
746 (int) (dev->dev->caps.fw_ver >> 16) & 0xffff,
747 (int) dev->dev->caps.fw_ver & 0xffff);
748 }
749
750 static ssize_t show_rev(struct device *device, struct device_attribute *attr,
751 char *buf)
752 {
753 struct mlx4_ib_dev *dev =
754 container_of(device, struct mlx4_ib_dev, ib_dev.dev);
755 return sprintf(buf, "%x\n", dev->dev->rev_id);
756 }
757
758 static ssize_t show_board(struct device *device, struct device_attribute *attr,
759 char *buf)
760 {
761 struct mlx4_ib_dev *dev =
762 container_of(device, struct mlx4_ib_dev, ib_dev.dev);
763 return sprintf(buf, "%.*s\n", MLX4_BOARD_ID_LEN,
764 dev->dev->board_id);
765 }
766
767 static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
768 static DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL);
769 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
770 static DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
771
772 static struct device_attribute *mlx4_class_attributes[] = {
773 &dev_attr_hw_rev,
774 &dev_attr_fw_ver,
775 &dev_attr_hca_type,
776 &dev_attr_board_id
777 };
778
779 static void mlx4_addrconf_ifid_eui48(u8 *eui, u16 vlan_id, struct net_device *dev)
780 {
781 memcpy(eui, dev->dev_addr, 3);
782 memcpy(eui + 5, dev->dev_addr + 3, 3);
783 if (vlan_id < 0x1000) {
784 eui[3] = vlan_id >> 8;
785 eui[4] = vlan_id & 0xff;
786 } else {
787 eui[3] = 0xff;
788 eui[4] = 0xfe;
789 }
790 eui[0] ^= 2;
791 }
792
793 static void update_gids_task(struct work_struct *work)
794 {
795 struct update_gid_work *gw = container_of(work, struct update_gid_work, work);
796 struct mlx4_cmd_mailbox *mailbox;
797 union ib_gid *gids;
798 int err;
799 struct mlx4_dev *dev = gw->dev->dev;
800 struct ib_event event;
801
802 mailbox = mlx4_alloc_cmd_mailbox(dev);
803 if (IS_ERR(mailbox)) {
804 printk(KERN_WARNING "update gid table failed %ld\n", PTR_ERR(mailbox));
805 return;
806 }
807
808 gids = mailbox->buf;
809 memcpy(gids, gw->gids, sizeof gw->gids);
810
811 err = mlx4_cmd(dev, mailbox->dma, MLX4_SET_PORT_GID_TABLE << 8 | gw->port,
812 1, MLX4_CMD_SET_PORT, MLX4_CMD_TIME_CLASS_B);
813 if (err)
814 printk(KERN_WARNING "set port command failed\n");
815 else {
816 memcpy(gw->dev->iboe.gid_table[gw->port - 1], gw->gids, sizeof gw->gids);
817 event.device = &gw->dev->ib_dev;
818 event.element.port_num = gw->port;
819 event.event = IB_EVENT_LID_CHANGE;
820 ib_dispatch_event(&event);
821 }
822
823 mlx4_free_cmd_mailbox(dev, mailbox);
824 kfree(gw);
825 }
826
827 static int update_ipv6_gids(struct mlx4_ib_dev *dev, int port, int clear)
828 {
829 struct net_device *ndev = dev->iboe.netdevs[port - 1];
830 struct update_gid_work *work;
831 struct net_device *tmp;
832 int i;
833 u8 *hits;
834 int ret;
835 union ib_gid gid;
836 int free;
837 int found;
838 int need_update = 0;
839 u16 vid;
840
841 work = kzalloc(sizeof *work, GFP_ATOMIC);
842 if (!work)
843 return -ENOMEM;
844
845 hits = kzalloc(128, GFP_ATOMIC);
846 if (!hits) {
847 ret = -ENOMEM;
848 goto out;
849 }
850
851 read_lock(&dev_base_lock);
852 for_each_netdev(&init_net, tmp) {
853 if (ndev && (tmp == ndev || rdma_vlan_dev_real_dev(tmp) == ndev)) {
854 gid.global.subnet_prefix = cpu_to_be64(0xfe80000000000000LL);
855 vid = rdma_vlan_dev_vlan_id(tmp);
856 mlx4_addrconf_ifid_eui48(&gid.raw[8], vid, ndev);
857 found = 0;
858 free = -1;
859 for (i = 0; i < 128; ++i) {
860 if (free < 0 &&
861 !memcmp(&dev->iboe.gid_table[port - 1][i], &zgid, sizeof zgid))
862 free = i;
863 if (!memcmp(&dev->iboe.gid_table[port - 1][i], &gid, sizeof gid)) {
864 hits[i] = 1;
865 found = 1;
866 break;
867 }
868 }
869
870 if (!found) {
871 if (tmp == ndev &&
872 (memcmp(&dev->iboe.gid_table[port - 1][0],
873 &gid, sizeof gid) ||
874 !memcmp(&dev->iboe.gid_table[port - 1][0],
875 &zgid, sizeof gid))) {
876 dev->iboe.gid_table[port - 1][0] = gid;
877 ++need_update;
878 hits[0] = 1;
879 } else if (free >= 0) {
880 dev->iboe.gid_table[port - 1][free] = gid;
881 hits[free] = 1;
882 ++need_update;
883 }
884 }
885 }
886 }
887 read_unlock(&dev_base_lock);
888
889 for (i = 0; i < 128; ++i)
890 if (!hits[i]) {
891 if (memcmp(&dev->iboe.gid_table[port - 1][i], &zgid, sizeof zgid))
892 ++need_update;
893 dev->iboe.gid_table[port - 1][i] = zgid;
894 }
895
896 if (need_update) {
897 memcpy(work->gids, dev->iboe.gid_table[port - 1], sizeof work->gids);
898 INIT_WORK(&work->work, update_gids_task);
899 work->port = port;
900 work->dev = dev;
901 queue_work(wq, &work->work);
902 } else
903 kfree(work);
904
905 kfree(hits);
906 return 0;
907
908 out:
909 kfree(work);
910 return ret;
911 }
912
913 static void handle_en_event(struct mlx4_ib_dev *dev, int port, unsigned long event)
914 {
915 switch (event) {
916 case NETDEV_UP:
917 case NETDEV_CHANGEADDR:
918 update_ipv6_gids(dev, port, 0);
919 break;
920
921 case NETDEV_DOWN:
922 update_ipv6_gids(dev, port, 1);
923 dev->iboe.netdevs[port - 1] = NULL;
924 }
925 }
926
927 static void netdev_added(struct mlx4_ib_dev *dev, int port)
928 {
929 update_ipv6_gids(dev, port, 0);
930 }
931
932 static void netdev_removed(struct mlx4_ib_dev *dev, int port)
933 {
934 update_ipv6_gids(dev, port, 1);
935 }
936
937 static int mlx4_ib_netdev_event(struct notifier_block *this, unsigned long event,
938 void *ptr)
939 {
940 struct net_device *dev = ptr;
941 struct mlx4_ib_dev *ibdev;
942 struct net_device *oldnd;
943 struct mlx4_ib_iboe *iboe;
944 int port;
945
946 if (!net_eq(dev_net(dev), &init_net))
947 return NOTIFY_DONE;
948
949 ibdev = container_of(this, struct mlx4_ib_dev, iboe.nb);
950 iboe = &ibdev->iboe;
951
952 spin_lock(&iboe->lock);
953 mlx4_foreach_ib_transport_port(port, ibdev->dev) {
954 oldnd = iboe->netdevs[port - 1];
955 iboe->netdevs[port - 1] =
956 mlx4_get_protocol_dev(ibdev->dev, MLX4_PROTOCOL_EN, port);
957 if (oldnd != iboe->netdevs[port - 1]) {
958 if (iboe->netdevs[port - 1])
959 netdev_added(ibdev, port);
960 else
961 netdev_removed(ibdev, port);
962 }
963 }
964
965 if (dev == iboe->netdevs[0] ||
966 (iboe->netdevs[0] && rdma_vlan_dev_real_dev(dev) == iboe->netdevs[0]))
967 handle_en_event(ibdev, 1, event);
968 else if (dev == iboe->netdevs[1]
969 || (iboe->netdevs[1] && rdma_vlan_dev_real_dev(dev) == iboe->netdevs[1]))
970 handle_en_event(ibdev, 2, event);
971
972 spin_unlock(&iboe->lock);
973
974 return NOTIFY_DONE;
975 }
976
977 static void *mlx4_ib_add(struct mlx4_dev *dev)
978 {
979 struct mlx4_ib_dev *ibdev;
980 int num_ports = 0;
981 int i;
982 int err;
983 struct mlx4_ib_iboe *iboe;
984
985 printk_once(KERN_INFO "%s", mlx4_ib_version);
986
987 mlx4_foreach_ib_transport_port(i, dev)
988 num_ports++;
989
990 /* No point in registering a device with no ports... */
991 if (num_ports == 0)
992 return NULL;
993
994 ibdev = (struct mlx4_ib_dev *) ib_alloc_device(sizeof *ibdev);
995 if (!ibdev) {
996 dev_err(&dev->pdev->dev, "Device struct alloc failed\n");
997 return NULL;
998 }
999
1000 iboe = &ibdev->iboe;
1001
1002 if (mlx4_pd_alloc(dev, &ibdev->priv_pdn))
1003 goto err_dealloc;
1004
1005 if (mlx4_uar_alloc(dev, &ibdev->priv_uar))
1006 goto err_pd;
1007
1008 ibdev->uar_map = ioremap(ibdev->priv_uar.pfn << PAGE_SHIFT, PAGE_SIZE);
1009 if (!ibdev->uar_map)
1010 goto err_uar;
1011 MLX4_INIT_DOORBELL_LOCK(&ibdev->uar_lock);
1012
1013 ibdev->dev = dev;
1014
1015 strlcpy(ibdev->ib_dev.name, "mlx4_%d", IB_DEVICE_NAME_MAX);
1016 ibdev->ib_dev.owner = THIS_MODULE;
1017 ibdev->ib_dev.node_type = RDMA_NODE_IB_CA;
1018 ibdev->ib_dev.local_dma_lkey = dev->caps.reserved_lkey;
1019 ibdev->num_ports = num_ports;
1020 ibdev->ib_dev.phys_port_cnt = ibdev->num_ports;
1021 ibdev->ib_dev.num_comp_vectors = dev->caps.num_comp_vectors;
1022 ibdev->ib_dev.dma_device = &dev->pdev->dev;
1023
1024 ibdev->ib_dev.uverbs_abi_ver = MLX4_IB_UVERBS_ABI_VERSION;
1025 ibdev->ib_dev.uverbs_cmd_mask =
1026 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
1027 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
1028 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
1029 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
1030 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
1031 (1ull << IB_USER_VERBS_CMD_REG_MR) |
1032 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
1033 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
1034 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
1035 (1ull << IB_USER_VERBS_CMD_RESIZE_CQ) |
1036 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
1037 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
1038 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
1039 (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
1040 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
1041 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) |
1042 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST) |
1043 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
1044 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
1045 (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
1046 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
1047
1048 ibdev->ib_dev.query_device = mlx4_ib_query_device;
1049 ibdev->ib_dev.query_port = mlx4_ib_query_port;
1050 ibdev->ib_dev.get_link_layer = mlx4_ib_port_link_layer;
1051 ibdev->ib_dev.query_gid = mlx4_ib_query_gid;
1052 ibdev->ib_dev.query_pkey = mlx4_ib_query_pkey;
1053 ibdev->ib_dev.modify_device = mlx4_ib_modify_device;
1054 ibdev->ib_dev.modify_port = mlx4_ib_modify_port;
1055 ibdev->ib_dev.alloc_ucontext = mlx4_ib_alloc_ucontext;
1056 ibdev->ib_dev.dealloc_ucontext = mlx4_ib_dealloc_ucontext;
1057 ibdev->ib_dev.mmap = mlx4_ib_mmap;
1058 ibdev->ib_dev.alloc_pd = mlx4_ib_alloc_pd;
1059 ibdev->ib_dev.dealloc_pd = mlx4_ib_dealloc_pd;
1060 ibdev->ib_dev.create_ah = mlx4_ib_create_ah;
1061 ibdev->ib_dev.query_ah = mlx4_ib_query_ah;
1062 ibdev->ib_dev.destroy_ah = mlx4_ib_destroy_ah;
1063 ibdev->ib_dev.create_srq = mlx4_ib_create_srq;
1064 ibdev->ib_dev.modify_srq = mlx4_ib_modify_srq;
1065 ibdev->ib_dev.query_srq = mlx4_ib_query_srq;
1066 ibdev->ib_dev.destroy_srq = mlx4_ib_destroy_srq;
1067 ibdev->ib_dev.post_srq_recv = mlx4_ib_post_srq_recv;
1068 ibdev->ib_dev.create_qp = mlx4_ib_create_qp;
1069 ibdev->ib_dev.modify_qp = mlx4_ib_modify_qp;
1070 ibdev->ib_dev.query_qp = mlx4_ib_query_qp;
1071 ibdev->ib_dev.destroy_qp = mlx4_ib_destroy_qp;
1072 ibdev->ib_dev.post_send = mlx4_ib_post_send;
1073 ibdev->ib_dev.post_recv = mlx4_ib_post_recv;
1074 ibdev->ib_dev.create_cq = mlx4_ib_create_cq;
1075 ibdev->ib_dev.modify_cq = mlx4_ib_modify_cq;
1076 ibdev->ib_dev.resize_cq = mlx4_ib_resize_cq;
1077 ibdev->ib_dev.destroy_cq = mlx4_ib_destroy_cq;
1078 ibdev->ib_dev.poll_cq = mlx4_ib_poll_cq;
1079 ibdev->ib_dev.req_notify_cq = mlx4_ib_arm_cq;
1080 ibdev->ib_dev.get_dma_mr = mlx4_ib_get_dma_mr;
1081 ibdev->ib_dev.reg_user_mr = mlx4_ib_reg_user_mr;
1082 ibdev->ib_dev.dereg_mr = mlx4_ib_dereg_mr;
1083 ibdev->ib_dev.alloc_fast_reg_mr = mlx4_ib_alloc_fast_reg_mr;
1084 ibdev->ib_dev.alloc_fast_reg_page_list = mlx4_ib_alloc_fast_reg_page_list;
1085 ibdev->ib_dev.free_fast_reg_page_list = mlx4_ib_free_fast_reg_page_list;
1086 ibdev->ib_dev.attach_mcast = mlx4_ib_mcg_attach;
1087 ibdev->ib_dev.detach_mcast = mlx4_ib_mcg_detach;
1088 ibdev->ib_dev.process_mad = mlx4_ib_process_mad;
1089
1090 ibdev->ib_dev.alloc_fmr = mlx4_ib_fmr_alloc;
1091 ibdev->ib_dev.map_phys_fmr = mlx4_ib_map_phys_fmr;
1092 ibdev->ib_dev.unmap_fmr = mlx4_ib_unmap_fmr;
1093 ibdev->ib_dev.dealloc_fmr = mlx4_ib_fmr_dealloc;
1094
1095 spin_lock_init(&iboe->lock);
1096
1097 if (init_node_data(ibdev))
1098 goto err_map;
1099
1100 spin_lock_init(&ibdev->sm_lock);
1101 mutex_init(&ibdev->cap_mask_mutex);
1102
1103 if (ib_register_device(&ibdev->ib_dev, NULL))
1104 goto err_map;
1105
1106 if (mlx4_ib_mad_init(ibdev))
1107 goto err_reg;
1108
1109 if (dev->caps.flags & MLX4_DEV_CAP_FLAG_IBOE && !iboe->nb.notifier_call) {
1110 iboe->nb.notifier_call = mlx4_ib_netdev_event;
1111 err = register_netdevice_notifier(&iboe->nb);
1112 if (err)
1113 goto err_reg;
1114 }
1115
1116 for (i = 0; i < ARRAY_SIZE(mlx4_class_attributes); ++i) {
1117 if (device_create_file(&ibdev->ib_dev.dev,
1118 mlx4_class_attributes[i]))
1119 goto err_notif;
1120 }
1121
1122 ibdev->ib_active = true;
1123
1124 return ibdev;
1125
1126 err_notif:
1127 if (unregister_netdevice_notifier(&ibdev->iboe.nb))
1128 printk(KERN_WARNING "failure unregistering notifier\n");
1129 flush_workqueue(wq);
1130
1131 err_reg:
1132 ib_unregister_device(&ibdev->ib_dev);
1133
1134 err_map:
1135 iounmap(ibdev->uar_map);
1136
1137 err_uar:
1138 mlx4_uar_free(dev, &ibdev->priv_uar);
1139
1140 err_pd:
1141 mlx4_pd_free(dev, ibdev->priv_pdn);
1142
1143 err_dealloc:
1144 ib_dealloc_device(&ibdev->ib_dev);
1145
1146 return NULL;
1147 }
1148
1149 static void mlx4_ib_remove(struct mlx4_dev *dev, void *ibdev_ptr)
1150 {
1151 struct mlx4_ib_dev *ibdev = ibdev_ptr;
1152 int p;
1153
1154 mlx4_ib_mad_cleanup(ibdev);
1155 ib_unregister_device(&ibdev->ib_dev);
1156 if (ibdev->iboe.nb.notifier_call) {
1157 if (unregister_netdevice_notifier(&ibdev->iboe.nb))
1158 printk(KERN_WARNING "failure unregistering notifier\n");
1159 ibdev->iboe.nb.notifier_call = NULL;
1160 }
1161 iounmap(ibdev->uar_map);
1162
1163 mlx4_foreach_port(p, dev, MLX4_PORT_TYPE_IB)
1164 mlx4_CLOSE_PORT(dev, p);
1165
1166 mlx4_uar_free(dev, &ibdev->priv_uar);
1167 mlx4_pd_free(dev, ibdev->priv_pdn);
1168 ib_dealloc_device(&ibdev->ib_dev);
1169 }
1170
1171 static void mlx4_ib_event(struct mlx4_dev *dev, void *ibdev_ptr,
1172 enum mlx4_dev_event event, int port)
1173 {
1174 struct ib_event ibev;
1175 struct mlx4_ib_dev *ibdev = to_mdev((struct ib_device *) ibdev_ptr);
1176
1177 if (port > ibdev->num_ports)
1178 return;
1179
1180 switch (event) {
1181 case MLX4_DEV_EVENT_PORT_UP:
1182 ibev.event = IB_EVENT_PORT_ACTIVE;
1183 break;
1184
1185 case MLX4_DEV_EVENT_PORT_DOWN:
1186 ibev.event = IB_EVENT_PORT_ERR;
1187 break;
1188
1189 case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
1190 ibdev->ib_active = false;
1191 ibev.event = IB_EVENT_DEVICE_FATAL;
1192 break;
1193
1194 default:
1195 return;
1196 }
1197
1198 ibev.device = ibdev_ptr;
1199 ibev.element.port_num = port;
1200
1201 ib_dispatch_event(&ibev);
1202 }
1203
1204 static struct mlx4_interface mlx4_ib_interface = {
1205 .add = mlx4_ib_add,
1206 .remove = mlx4_ib_remove,
1207 .event = mlx4_ib_event,
1208 .protocol = MLX4_PROTOCOL_IB
1209 };
1210
1211 static int __init mlx4_ib_init(void)
1212 {
1213 int err;
1214
1215 wq = create_singlethread_workqueue("mlx4_ib");
1216 if (!wq)
1217 return -ENOMEM;
1218
1219 err = mlx4_register_interface(&mlx4_ib_interface);
1220 if (err) {
1221 destroy_workqueue(wq);
1222 return err;
1223 }
1224
1225 return 0;
1226 }
1227
1228 static void __exit mlx4_ib_cleanup(void)
1229 {
1230 mlx4_unregister_interface(&mlx4_ib_interface);
1231 destroy_workqueue(wq);
1232 }
1233
1234 module_init(mlx4_ib_init);
1235 module_exit(mlx4_ib_cleanup);