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IB/mlx4: Fix possible deadlock on sm_lock spinlock
[deliverable/linux.git] / drivers / infiniband / hw / mlx4 / main.c
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_DRV_NAME
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 if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_XRC)
132 props->device_cap_flags |= IB_DEVICE_XRC;
133
134 props->vendor_id = be32_to_cpup((__be32 *) (out_mad->data + 36)) &
135 0xffffff;
136 props->vendor_part_id = be16_to_cpup((__be16 *) (out_mad->data + 30));
137 props->hw_ver = be32_to_cpup((__be32 *) (out_mad->data + 32));
138 memcpy(&props->sys_image_guid, out_mad->data + 4, 8);
139
140 props->max_mr_size = ~0ull;
141 props->page_size_cap = dev->dev->caps.page_size_cap;
142 props->max_qp = dev->dev->caps.num_qps - dev->dev->caps.reserved_qps;
143 props->max_qp_wr = dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE;
144 props->max_sge = min(dev->dev->caps.max_sq_sg,
145 dev->dev->caps.max_rq_sg);
146 props->max_cq = dev->dev->caps.num_cqs - dev->dev->caps.reserved_cqs;
147 props->max_cqe = dev->dev->caps.max_cqes;
148 props->max_mr = dev->dev->caps.num_mpts - dev->dev->caps.reserved_mrws;
149 props->max_pd = dev->dev->caps.num_pds - dev->dev->caps.reserved_pds;
150 props->max_qp_rd_atom = dev->dev->caps.max_qp_dest_rdma;
151 props->max_qp_init_rd_atom = dev->dev->caps.max_qp_init_rdma;
152 props->max_res_rd_atom = props->max_qp_rd_atom * props->max_qp;
153 props->max_srq = dev->dev->caps.num_srqs - dev->dev->caps.reserved_srqs;
154 props->max_srq_wr = dev->dev->caps.max_srq_wqes - 1;
155 props->max_srq_sge = dev->dev->caps.max_srq_sge;
156 props->max_fast_reg_page_list_len = MLX4_MAX_FAST_REG_PAGES;
157 props->local_ca_ack_delay = dev->dev->caps.local_ca_ack_delay;
158 props->atomic_cap = dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_ATOMIC ?
159 IB_ATOMIC_HCA : IB_ATOMIC_NONE;
160 props->masked_atomic_cap = props->atomic_cap;
161 props->max_pkeys = dev->dev->caps.pkey_table_len[1];
162 props->max_mcast_grp = dev->dev->caps.num_mgms + dev->dev->caps.num_amgms;
163 props->max_mcast_qp_attach = dev->dev->caps.num_qp_per_mgm;
164 props->max_total_mcast_qp_attach = props->max_mcast_qp_attach *
165 props->max_mcast_grp;
166 props->max_map_per_fmr = dev->dev->caps.max_fmr_maps;
167
168 out:
169 kfree(in_mad);
170 kfree(out_mad);
171
172 return err;
173 }
174
175 static enum rdma_link_layer
176 mlx4_ib_port_link_layer(struct ib_device *device, u8 port_num)
177 {
178 struct mlx4_dev *dev = to_mdev(device)->dev;
179
180 return dev->caps.port_mask[port_num] == MLX4_PORT_TYPE_IB ?
181 IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET;
182 }
183
184 static int ib_link_query_port(struct ib_device *ibdev, u8 port,
185 struct ib_port_attr *props)
186 {
187 struct ib_smp *in_mad = NULL;
188 struct ib_smp *out_mad = NULL;
189 int ext_active_speed;
190 int err = -ENOMEM;
191
192 in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL);
193 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
194 if (!in_mad || !out_mad)
195 goto out;
196
197 init_query_mad(in_mad);
198 in_mad->attr_id = IB_SMP_ATTR_PORT_INFO;
199 in_mad->attr_mod = cpu_to_be32(port);
200
201 err = mlx4_MAD_IFC(to_mdev(ibdev), 1, 1, port, NULL, NULL,
202 in_mad, out_mad);
203 if (err)
204 goto out;
205
206
207 props->lid = be16_to_cpup((__be16 *) (out_mad->data + 16));
208 props->lmc = out_mad->data[34] & 0x7;
209 props->sm_lid = be16_to_cpup((__be16 *) (out_mad->data + 18));
210 props->sm_sl = out_mad->data[36] & 0xf;
211 props->state = out_mad->data[32] & 0xf;
212 props->phys_state = out_mad->data[33] >> 4;
213 props->port_cap_flags = be32_to_cpup((__be32 *) (out_mad->data + 20));
214 props->gid_tbl_len = to_mdev(ibdev)->dev->caps.gid_table_len[port];
215 props->max_msg_sz = to_mdev(ibdev)->dev->caps.max_msg_sz;
216 props->pkey_tbl_len = to_mdev(ibdev)->dev->caps.pkey_table_len[port];
217 props->bad_pkey_cntr = be16_to_cpup((__be16 *) (out_mad->data + 46));
218 props->qkey_viol_cntr = be16_to_cpup((__be16 *) (out_mad->data + 48));
219 props->active_width = out_mad->data[31] & 0xf;
220 props->active_speed = out_mad->data[35] >> 4;
221 props->max_mtu = out_mad->data[41] & 0xf;
222 props->active_mtu = out_mad->data[36] >> 4;
223 props->subnet_timeout = out_mad->data[51] & 0x1f;
224 props->max_vl_num = out_mad->data[37] >> 4;
225 props->init_type_reply = out_mad->data[41] >> 4;
226
227 /* Check if extended speeds (EDR/FDR/...) are supported */
228 if (props->port_cap_flags & IB_PORT_EXTENDED_SPEEDS_SUP) {
229 ext_active_speed = out_mad->data[62] >> 4;
230
231 switch (ext_active_speed) {
232 case 1:
233 props->active_speed = IB_SPEED_FDR;
234 break;
235 case 2:
236 props->active_speed = IB_SPEED_EDR;
237 break;
238 }
239 }
240
241 /* If reported active speed is QDR, check if is FDR-10 */
242 if (props->active_speed == IB_SPEED_QDR) {
243 init_query_mad(in_mad);
244 in_mad->attr_id = MLX4_ATTR_EXTENDED_PORT_INFO;
245 in_mad->attr_mod = cpu_to_be32(port);
246
247 err = mlx4_MAD_IFC(to_mdev(ibdev), 1, 1, port,
248 NULL, NULL, in_mad, out_mad);
249 if (err)
250 goto out;
251
252 /* Checking LinkSpeedActive for FDR-10 */
253 if (out_mad->data[15] & 0x1)
254 props->active_speed = IB_SPEED_FDR10;
255 }
256
257 /* Avoid wrong speed value returned by FW if the IB link is down. */
258 if (props->state == IB_PORT_DOWN)
259 props->active_speed = IB_SPEED_SDR;
260
261 out:
262 kfree(in_mad);
263 kfree(out_mad);
264 return err;
265 }
266
267 static u8 state_to_phys_state(enum ib_port_state state)
268 {
269 return state == IB_PORT_ACTIVE ? 5 : 3;
270 }
271
272 static int eth_link_query_port(struct ib_device *ibdev, u8 port,
273 struct ib_port_attr *props)
274 {
275
276 struct mlx4_ib_dev *mdev = to_mdev(ibdev);
277 struct mlx4_ib_iboe *iboe = &mdev->iboe;
278 struct net_device *ndev;
279 enum ib_mtu tmp;
280 struct mlx4_cmd_mailbox *mailbox;
281 int err = 0;
282
283 mailbox = mlx4_alloc_cmd_mailbox(mdev->dev);
284 if (IS_ERR(mailbox))
285 return PTR_ERR(mailbox);
286
287 err = mlx4_cmd_box(mdev->dev, 0, mailbox->dma, port, 0,
288 MLX4_CMD_QUERY_PORT, MLX4_CMD_TIME_CLASS_B,
289 MLX4_CMD_WRAPPED);
290 if (err)
291 goto out;
292
293 props->active_width = (((u8 *)mailbox->buf)[5] == 0x40) ?
294 IB_WIDTH_4X : IB_WIDTH_1X;
295 props->active_speed = IB_SPEED_QDR;
296 props->port_cap_flags = IB_PORT_CM_SUP;
297 props->gid_tbl_len = mdev->dev->caps.gid_table_len[port];
298 props->max_msg_sz = mdev->dev->caps.max_msg_sz;
299 props->pkey_tbl_len = 1;
300 props->max_mtu = IB_MTU_4096;
301 props->max_vl_num = 2;
302 props->state = IB_PORT_DOWN;
303 props->phys_state = state_to_phys_state(props->state);
304 props->active_mtu = IB_MTU_256;
305 spin_lock(&iboe->lock);
306 ndev = iboe->netdevs[port - 1];
307 if (!ndev)
308 goto out_unlock;
309
310 tmp = iboe_get_mtu(ndev->mtu);
311 props->active_mtu = tmp ? min(props->max_mtu, tmp) : IB_MTU_256;
312
313 props->state = (netif_running(ndev) && netif_carrier_ok(ndev)) ?
314 IB_PORT_ACTIVE : IB_PORT_DOWN;
315 props->phys_state = state_to_phys_state(props->state);
316 out_unlock:
317 spin_unlock(&iboe->lock);
318 out:
319 mlx4_free_cmd_mailbox(mdev->dev, mailbox);
320 return err;
321 }
322
323 static int mlx4_ib_query_port(struct ib_device *ibdev, u8 port,
324 struct ib_port_attr *props)
325 {
326 int err;
327
328 memset(props, 0, sizeof *props);
329
330 err = mlx4_ib_port_link_layer(ibdev, port) == IB_LINK_LAYER_INFINIBAND ?
331 ib_link_query_port(ibdev, port, props) :
332 eth_link_query_port(ibdev, port, props);
333
334 return err;
335 }
336
337 static int __mlx4_ib_query_gid(struct ib_device *ibdev, u8 port, int index,
338 union ib_gid *gid)
339 {
340 struct ib_smp *in_mad = NULL;
341 struct ib_smp *out_mad = NULL;
342 int err = -ENOMEM;
343
344 in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL);
345 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
346 if (!in_mad || !out_mad)
347 goto out;
348
349 init_query_mad(in_mad);
350 in_mad->attr_id = IB_SMP_ATTR_PORT_INFO;
351 in_mad->attr_mod = cpu_to_be32(port);
352
353 err = mlx4_MAD_IFC(to_mdev(ibdev), 1, 1, port, NULL, NULL, in_mad, out_mad);
354 if (err)
355 goto out;
356
357 memcpy(gid->raw, out_mad->data + 8, 8);
358
359 init_query_mad(in_mad);
360 in_mad->attr_id = IB_SMP_ATTR_GUID_INFO;
361 in_mad->attr_mod = cpu_to_be32(index / 8);
362
363 err = mlx4_MAD_IFC(to_mdev(ibdev), 1, 1, port, NULL, NULL, in_mad, out_mad);
364 if (err)
365 goto out;
366
367 memcpy(gid->raw + 8, out_mad->data + (index % 8) * 8, 8);
368
369 out:
370 kfree(in_mad);
371 kfree(out_mad);
372 return err;
373 }
374
375 static int iboe_query_gid(struct ib_device *ibdev, u8 port, int index,
376 union ib_gid *gid)
377 {
378 struct mlx4_ib_dev *dev = to_mdev(ibdev);
379
380 *gid = dev->iboe.gid_table[port - 1][index];
381
382 return 0;
383 }
384
385 static int mlx4_ib_query_gid(struct ib_device *ibdev, u8 port, int index,
386 union ib_gid *gid)
387 {
388 if (rdma_port_get_link_layer(ibdev, port) == IB_LINK_LAYER_INFINIBAND)
389 return __mlx4_ib_query_gid(ibdev, port, index, gid);
390 else
391 return iboe_query_gid(ibdev, port, index, gid);
392 }
393
394 static int mlx4_ib_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
395 u16 *pkey)
396 {
397 struct ib_smp *in_mad = NULL;
398 struct ib_smp *out_mad = NULL;
399 int err = -ENOMEM;
400
401 in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL);
402 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
403 if (!in_mad || !out_mad)
404 goto out;
405
406 init_query_mad(in_mad);
407 in_mad->attr_id = IB_SMP_ATTR_PKEY_TABLE;
408 in_mad->attr_mod = cpu_to_be32(index / 32);
409
410 err = mlx4_MAD_IFC(to_mdev(ibdev), 1, 1, port, NULL, NULL, in_mad, out_mad);
411 if (err)
412 goto out;
413
414 *pkey = be16_to_cpu(((__be16 *) out_mad->data)[index % 32]);
415
416 out:
417 kfree(in_mad);
418 kfree(out_mad);
419 return err;
420 }
421
422 static int mlx4_ib_modify_device(struct ib_device *ibdev, int mask,
423 struct ib_device_modify *props)
424 {
425 struct mlx4_cmd_mailbox *mailbox;
426 unsigned long flags;
427
428 if (mask & ~IB_DEVICE_MODIFY_NODE_DESC)
429 return -EOPNOTSUPP;
430
431 if (!(mask & IB_DEVICE_MODIFY_NODE_DESC))
432 return 0;
433
434 spin_lock_irqsave(&to_mdev(ibdev)->sm_lock, flags);
435 memcpy(ibdev->node_desc, props->node_desc, 64);
436 spin_unlock_irqrestore(&to_mdev(ibdev)->sm_lock, flags);
437
438 /*
439 * If possible, pass node desc to FW, so it can generate
440 * a 144 trap. If cmd fails, just ignore.
441 */
442 mailbox = mlx4_alloc_cmd_mailbox(to_mdev(ibdev)->dev);
443 if (IS_ERR(mailbox))
444 return 0;
445
446 memset(mailbox->buf, 0, 256);
447 memcpy(mailbox->buf, props->node_desc, 64);
448 mlx4_cmd(to_mdev(ibdev)->dev, mailbox->dma, 1, 0,
449 MLX4_CMD_SET_NODE, MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
450
451 mlx4_free_cmd_mailbox(to_mdev(ibdev)->dev, mailbox);
452
453 return 0;
454 }
455
456 static int mlx4_SET_PORT(struct mlx4_ib_dev *dev, u8 port, int reset_qkey_viols,
457 u32 cap_mask)
458 {
459 struct mlx4_cmd_mailbox *mailbox;
460 int err;
461 u8 is_eth = dev->dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH;
462
463 mailbox = mlx4_alloc_cmd_mailbox(dev->dev);
464 if (IS_ERR(mailbox))
465 return PTR_ERR(mailbox);
466
467 memset(mailbox->buf, 0, 256);
468
469 if (dev->dev->flags & MLX4_FLAG_OLD_PORT_CMDS) {
470 *(u8 *) mailbox->buf = !!reset_qkey_viols << 6;
471 ((__be32 *) mailbox->buf)[2] = cpu_to_be32(cap_mask);
472 } else {
473 ((u8 *) mailbox->buf)[3] = !!reset_qkey_viols;
474 ((__be32 *) mailbox->buf)[1] = cpu_to_be32(cap_mask);
475 }
476
477 err = mlx4_cmd(dev->dev, mailbox->dma, port, is_eth, MLX4_CMD_SET_PORT,
478 MLX4_CMD_TIME_CLASS_B, MLX4_CMD_NATIVE);
479
480 mlx4_free_cmd_mailbox(dev->dev, mailbox);
481 return err;
482 }
483
484 static int mlx4_ib_modify_port(struct ib_device *ibdev, u8 port, int mask,
485 struct ib_port_modify *props)
486 {
487 struct ib_port_attr attr;
488 u32 cap_mask;
489 int err;
490
491 mutex_lock(&to_mdev(ibdev)->cap_mask_mutex);
492
493 err = mlx4_ib_query_port(ibdev, port, &attr);
494 if (err)
495 goto out;
496
497 cap_mask = (attr.port_cap_flags | props->set_port_cap_mask) &
498 ~props->clr_port_cap_mask;
499
500 err = mlx4_SET_PORT(to_mdev(ibdev), port,
501 !!(mask & IB_PORT_RESET_QKEY_CNTR),
502 cap_mask);
503
504 out:
505 mutex_unlock(&to_mdev(ibdev)->cap_mask_mutex);
506 return err;
507 }
508
509 static struct ib_ucontext *mlx4_ib_alloc_ucontext(struct ib_device *ibdev,
510 struct ib_udata *udata)
511 {
512 struct mlx4_ib_dev *dev = to_mdev(ibdev);
513 struct mlx4_ib_ucontext *context;
514 struct mlx4_ib_alloc_ucontext_resp resp;
515 int err;
516
517 if (!dev->ib_active)
518 return ERR_PTR(-EAGAIN);
519
520 resp.qp_tab_size = dev->dev->caps.num_qps;
521 resp.bf_reg_size = dev->dev->caps.bf_reg_size;
522 resp.bf_regs_per_page = dev->dev->caps.bf_regs_per_page;
523
524 context = kmalloc(sizeof *context, GFP_KERNEL);
525 if (!context)
526 return ERR_PTR(-ENOMEM);
527
528 err = mlx4_uar_alloc(to_mdev(ibdev)->dev, &context->uar);
529 if (err) {
530 kfree(context);
531 return ERR_PTR(err);
532 }
533
534 INIT_LIST_HEAD(&context->db_page_list);
535 mutex_init(&context->db_page_mutex);
536
537 err = ib_copy_to_udata(udata, &resp, sizeof resp);
538 if (err) {
539 mlx4_uar_free(to_mdev(ibdev)->dev, &context->uar);
540 kfree(context);
541 return ERR_PTR(-EFAULT);
542 }
543
544 return &context->ibucontext;
545 }
546
547 static int mlx4_ib_dealloc_ucontext(struct ib_ucontext *ibcontext)
548 {
549 struct mlx4_ib_ucontext *context = to_mucontext(ibcontext);
550
551 mlx4_uar_free(to_mdev(ibcontext->device)->dev, &context->uar);
552 kfree(context);
553
554 return 0;
555 }
556
557 static int mlx4_ib_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
558 {
559 struct mlx4_ib_dev *dev = to_mdev(context->device);
560
561 if (vma->vm_end - vma->vm_start != PAGE_SIZE)
562 return -EINVAL;
563
564 if (vma->vm_pgoff == 0) {
565 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
566
567 if (io_remap_pfn_range(vma, vma->vm_start,
568 to_mucontext(context)->uar.pfn,
569 PAGE_SIZE, vma->vm_page_prot))
570 return -EAGAIN;
571 } else if (vma->vm_pgoff == 1 && dev->dev->caps.bf_reg_size != 0) {
572 vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
573
574 if (io_remap_pfn_range(vma, vma->vm_start,
575 to_mucontext(context)->uar.pfn +
576 dev->dev->caps.num_uars,
577 PAGE_SIZE, vma->vm_page_prot))
578 return -EAGAIN;
579 } else
580 return -EINVAL;
581
582 return 0;
583 }
584
585 static struct ib_pd *mlx4_ib_alloc_pd(struct ib_device *ibdev,
586 struct ib_ucontext *context,
587 struct ib_udata *udata)
588 {
589 struct mlx4_ib_pd *pd;
590 int err;
591
592 pd = kmalloc(sizeof *pd, GFP_KERNEL);
593 if (!pd)
594 return ERR_PTR(-ENOMEM);
595
596 err = mlx4_pd_alloc(to_mdev(ibdev)->dev, &pd->pdn);
597 if (err) {
598 kfree(pd);
599 return ERR_PTR(err);
600 }
601
602 if (context)
603 if (ib_copy_to_udata(udata, &pd->pdn, sizeof (__u32))) {
604 mlx4_pd_free(to_mdev(ibdev)->dev, pd->pdn);
605 kfree(pd);
606 return ERR_PTR(-EFAULT);
607 }
608
609 return &pd->ibpd;
610 }
611
612 static int mlx4_ib_dealloc_pd(struct ib_pd *pd)
613 {
614 mlx4_pd_free(to_mdev(pd->device)->dev, to_mpd(pd)->pdn);
615 kfree(pd);
616
617 return 0;
618 }
619
620 static struct ib_xrcd *mlx4_ib_alloc_xrcd(struct ib_device *ibdev,
621 struct ib_ucontext *context,
622 struct ib_udata *udata)
623 {
624 struct mlx4_ib_xrcd *xrcd;
625 int err;
626
627 if (!(to_mdev(ibdev)->dev->caps.flags & MLX4_DEV_CAP_FLAG_XRC))
628 return ERR_PTR(-ENOSYS);
629
630 xrcd = kmalloc(sizeof *xrcd, GFP_KERNEL);
631 if (!xrcd)
632 return ERR_PTR(-ENOMEM);
633
634 err = mlx4_xrcd_alloc(to_mdev(ibdev)->dev, &xrcd->xrcdn);
635 if (err)
636 goto err1;
637
638 xrcd->pd = ib_alloc_pd(ibdev);
639 if (IS_ERR(xrcd->pd)) {
640 err = PTR_ERR(xrcd->pd);
641 goto err2;
642 }
643
644 xrcd->cq = ib_create_cq(ibdev, NULL, NULL, xrcd, 1, 0);
645 if (IS_ERR(xrcd->cq)) {
646 err = PTR_ERR(xrcd->cq);
647 goto err3;
648 }
649
650 return &xrcd->ibxrcd;
651
652 err3:
653 ib_dealloc_pd(xrcd->pd);
654 err2:
655 mlx4_xrcd_free(to_mdev(ibdev)->dev, xrcd->xrcdn);
656 err1:
657 kfree(xrcd);
658 return ERR_PTR(err);
659 }
660
661 static int mlx4_ib_dealloc_xrcd(struct ib_xrcd *xrcd)
662 {
663 ib_destroy_cq(to_mxrcd(xrcd)->cq);
664 ib_dealloc_pd(to_mxrcd(xrcd)->pd);
665 mlx4_xrcd_free(to_mdev(xrcd->device)->dev, to_mxrcd(xrcd)->xrcdn);
666 kfree(xrcd);
667
668 return 0;
669 }
670
671 static int add_gid_entry(struct ib_qp *ibqp, union ib_gid *gid)
672 {
673 struct mlx4_ib_qp *mqp = to_mqp(ibqp);
674 struct mlx4_ib_dev *mdev = to_mdev(ibqp->device);
675 struct mlx4_ib_gid_entry *ge;
676
677 ge = kzalloc(sizeof *ge, GFP_KERNEL);
678 if (!ge)
679 return -ENOMEM;
680
681 ge->gid = *gid;
682 if (mlx4_ib_add_mc(mdev, mqp, gid)) {
683 ge->port = mqp->port;
684 ge->added = 1;
685 }
686
687 mutex_lock(&mqp->mutex);
688 list_add_tail(&ge->list, &mqp->gid_list);
689 mutex_unlock(&mqp->mutex);
690
691 return 0;
692 }
693
694 int mlx4_ib_add_mc(struct mlx4_ib_dev *mdev, struct mlx4_ib_qp *mqp,
695 union ib_gid *gid)
696 {
697 u8 mac[6];
698 struct net_device *ndev;
699 int ret = 0;
700
701 if (!mqp->port)
702 return 0;
703
704 spin_lock(&mdev->iboe.lock);
705 ndev = mdev->iboe.netdevs[mqp->port - 1];
706 if (ndev)
707 dev_hold(ndev);
708 spin_unlock(&mdev->iboe.lock);
709
710 if (ndev) {
711 rdma_get_mcast_mac((struct in6_addr *)gid, mac);
712 rtnl_lock();
713 dev_mc_add(mdev->iboe.netdevs[mqp->port - 1], mac);
714 ret = 1;
715 rtnl_unlock();
716 dev_put(ndev);
717 }
718
719 return ret;
720 }
721
722 struct mlx4_ib_steering {
723 struct list_head list;
724 u64 reg_id;
725 union ib_gid gid;
726 };
727
728 static int mlx4_ib_mcg_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
729 {
730 int err;
731 struct mlx4_ib_dev *mdev = to_mdev(ibqp->device);
732 struct mlx4_ib_qp *mqp = to_mqp(ibqp);
733 u64 reg_id;
734 struct mlx4_ib_steering *ib_steering = NULL;
735
736 if (mdev->dev->caps.steering_mode ==
737 MLX4_STEERING_MODE_DEVICE_MANAGED) {
738 ib_steering = kmalloc(sizeof(*ib_steering), GFP_KERNEL);
739 if (!ib_steering)
740 return -ENOMEM;
741 }
742
743 err = mlx4_multicast_attach(mdev->dev, &mqp->mqp, gid->raw, mqp->port,
744 !!(mqp->flags &
745 MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK),
746 MLX4_PROT_IB_IPV6, &reg_id);
747 if (err)
748 goto err_malloc;
749
750 err = add_gid_entry(ibqp, gid);
751 if (err)
752 goto err_add;
753
754 if (ib_steering) {
755 memcpy(ib_steering->gid.raw, gid->raw, 16);
756 ib_steering->reg_id = reg_id;
757 mutex_lock(&mqp->mutex);
758 list_add(&ib_steering->list, &mqp->steering_rules);
759 mutex_unlock(&mqp->mutex);
760 }
761 return 0;
762
763 err_add:
764 mlx4_multicast_detach(mdev->dev, &mqp->mqp, gid->raw,
765 MLX4_PROT_IB_IPV6, reg_id);
766 err_malloc:
767 kfree(ib_steering);
768
769 return err;
770 }
771
772 static struct mlx4_ib_gid_entry *find_gid_entry(struct mlx4_ib_qp *qp, u8 *raw)
773 {
774 struct mlx4_ib_gid_entry *ge;
775 struct mlx4_ib_gid_entry *tmp;
776 struct mlx4_ib_gid_entry *ret = NULL;
777
778 list_for_each_entry_safe(ge, tmp, &qp->gid_list, list) {
779 if (!memcmp(raw, ge->gid.raw, 16)) {
780 ret = ge;
781 break;
782 }
783 }
784
785 return ret;
786 }
787
788 static int mlx4_ib_mcg_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
789 {
790 int err;
791 struct mlx4_ib_dev *mdev = to_mdev(ibqp->device);
792 struct mlx4_ib_qp *mqp = to_mqp(ibqp);
793 u8 mac[6];
794 struct net_device *ndev;
795 struct mlx4_ib_gid_entry *ge;
796 u64 reg_id = 0;
797
798 if (mdev->dev->caps.steering_mode ==
799 MLX4_STEERING_MODE_DEVICE_MANAGED) {
800 struct mlx4_ib_steering *ib_steering;
801
802 mutex_lock(&mqp->mutex);
803 list_for_each_entry(ib_steering, &mqp->steering_rules, list) {
804 if (!memcmp(ib_steering->gid.raw, gid->raw, 16)) {
805 list_del(&ib_steering->list);
806 break;
807 }
808 }
809 mutex_unlock(&mqp->mutex);
810 if (&ib_steering->list == &mqp->steering_rules) {
811 pr_err("Couldn't find reg_id for mgid. Steering rule is left attached\n");
812 return -EINVAL;
813 }
814 reg_id = ib_steering->reg_id;
815 kfree(ib_steering);
816 }
817
818 err = mlx4_multicast_detach(mdev->dev, &mqp->mqp, gid->raw,
819 MLX4_PROT_IB_IPV6, reg_id);
820 if (err)
821 return err;
822
823 mutex_lock(&mqp->mutex);
824 ge = find_gid_entry(mqp, gid->raw);
825 if (ge) {
826 spin_lock(&mdev->iboe.lock);
827 ndev = ge->added ? mdev->iboe.netdevs[ge->port - 1] : NULL;
828 if (ndev)
829 dev_hold(ndev);
830 spin_unlock(&mdev->iboe.lock);
831 rdma_get_mcast_mac((struct in6_addr *)gid, mac);
832 if (ndev) {
833 rtnl_lock();
834 dev_mc_del(mdev->iboe.netdevs[ge->port - 1], mac);
835 rtnl_unlock();
836 dev_put(ndev);
837 }
838 list_del(&ge->list);
839 kfree(ge);
840 } else
841 pr_warn("could not find mgid entry\n");
842
843 mutex_unlock(&mqp->mutex);
844
845 return 0;
846 }
847
848 static int init_node_data(struct mlx4_ib_dev *dev)
849 {
850 struct ib_smp *in_mad = NULL;
851 struct ib_smp *out_mad = NULL;
852 int err = -ENOMEM;
853
854 in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL);
855 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
856 if (!in_mad || !out_mad)
857 goto out;
858
859 init_query_mad(in_mad);
860 in_mad->attr_id = IB_SMP_ATTR_NODE_DESC;
861
862 err = mlx4_MAD_IFC(dev, 1, 1, 1, NULL, NULL, in_mad, out_mad);
863 if (err)
864 goto out;
865
866 memcpy(dev->ib_dev.node_desc, out_mad->data, 64);
867
868 in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
869
870 err = mlx4_MAD_IFC(dev, 1, 1, 1, NULL, NULL, in_mad, out_mad);
871 if (err)
872 goto out;
873
874 memcpy(&dev->ib_dev.node_guid, out_mad->data + 12, 8);
875
876 out:
877 kfree(in_mad);
878 kfree(out_mad);
879 return err;
880 }
881
882 static ssize_t show_hca(struct device *device, struct device_attribute *attr,
883 char *buf)
884 {
885 struct mlx4_ib_dev *dev =
886 container_of(device, struct mlx4_ib_dev, ib_dev.dev);
887 return sprintf(buf, "MT%d\n", dev->dev->pdev->device);
888 }
889
890 static ssize_t show_fw_ver(struct device *device, struct device_attribute *attr,
891 char *buf)
892 {
893 struct mlx4_ib_dev *dev =
894 container_of(device, struct mlx4_ib_dev, ib_dev.dev);
895 return sprintf(buf, "%d.%d.%d\n", (int) (dev->dev->caps.fw_ver >> 32),
896 (int) (dev->dev->caps.fw_ver >> 16) & 0xffff,
897 (int) dev->dev->caps.fw_ver & 0xffff);
898 }
899
900 static ssize_t show_rev(struct device *device, struct device_attribute *attr,
901 char *buf)
902 {
903 struct mlx4_ib_dev *dev =
904 container_of(device, struct mlx4_ib_dev, ib_dev.dev);
905 return sprintf(buf, "%x\n", dev->dev->rev_id);
906 }
907
908 static ssize_t show_board(struct device *device, struct device_attribute *attr,
909 char *buf)
910 {
911 struct mlx4_ib_dev *dev =
912 container_of(device, struct mlx4_ib_dev, ib_dev.dev);
913 return sprintf(buf, "%.*s\n", MLX4_BOARD_ID_LEN,
914 dev->dev->board_id);
915 }
916
917 static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
918 static DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL);
919 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
920 static DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
921
922 static struct device_attribute *mlx4_class_attributes[] = {
923 &dev_attr_hw_rev,
924 &dev_attr_fw_ver,
925 &dev_attr_hca_type,
926 &dev_attr_board_id
927 };
928
929 static void mlx4_addrconf_ifid_eui48(u8 *eui, u16 vlan_id, struct net_device *dev)
930 {
931 memcpy(eui, dev->dev_addr, 3);
932 memcpy(eui + 5, dev->dev_addr + 3, 3);
933 if (vlan_id < 0x1000) {
934 eui[3] = vlan_id >> 8;
935 eui[4] = vlan_id & 0xff;
936 } else {
937 eui[3] = 0xff;
938 eui[4] = 0xfe;
939 }
940 eui[0] ^= 2;
941 }
942
943 static void update_gids_task(struct work_struct *work)
944 {
945 struct update_gid_work *gw = container_of(work, struct update_gid_work, work);
946 struct mlx4_cmd_mailbox *mailbox;
947 union ib_gid *gids;
948 int err;
949 struct mlx4_dev *dev = gw->dev->dev;
950
951 mailbox = mlx4_alloc_cmd_mailbox(dev);
952 if (IS_ERR(mailbox)) {
953 pr_warn("update gid table failed %ld\n", PTR_ERR(mailbox));
954 return;
955 }
956
957 gids = mailbox->buf;
958 memcpy(gids, gw->gids, sizeof gw->gids);
959
960 err = mlx4_cmd(dev, mailbox->dma, MLX4_SET_PORT_GID_TABLE << 8 | gw->port,
961 1, MLX4_CMD_SET_PORT, MLX4_CMD_TIME_CLASS_B,
962 MLX4_CMD_NATIVE);
963 if (err)
964 pr_warn("set port command failed\n");
965 else {
966 memcpy(gw->dev->iboe.gid_table[gw->port - 1], gw->gids, sizeof gw->gids);
967 mlx4_ib_dispatch_event(gw->dev, gw->port, IB_EVENT_GID_CHANGE);
968 }
969
970 mlx4_free_cmd_mailbox(dev, mailbox);
971 kfree(gw);
972 }
973
974 static int update_ipv6_gids(struct mlx4_ib_dev *dev, int port, int clear)
975 {
976 struct net_device *ndev = dev->iboe.netdevs[port - 1];
977 struct update_gid_work *work;
978 struct net_device *tmp;
979 int i;
980 u8 *hits;
981 int ret;
982 union ib_gid gid;
983 int free;
984 int found;
985 int need_update = 0;
986 u16 vid;
987
988 work = kzalloc(sizeof *work, GFP_ATOMIC);
989 if (!work)
990 return -ENOMEM;
991
992 hits = kzalloc(128, GFP_ATOMIC);
993 if (!hits) {
994 ret = -ENOMEM;
995 goto out;
996 }
997
998 rcu_read_lock();
999 for_each_netdev_rcu(&init_net, tmp) {
1000 if (ndev && (tmp == ndev || rdma_vlan_dev_real_dev(tmp) == ndev)) {
1001 gid.global.subnet_prefix = cpu_to_be64(0xfe80000000000000LL);
1002 vid = rdma_vlan_dev_vlan_id(tmp);
1003 mlx4_addrconf_ifid_eui48(&gid.raw[8], vid, ndev);
1004 found = 0;
1005 free = -1;
1006 for (i = 0; i < 128; ++i) {
1007 if (free < 0 &&
1008 !memcmp(&dev->iboe.gid_table[port - 1][i], &zgid, sizeof zgid))
1009 free = i;
1010 if (!memcmp(&dev->iboe.gid_table[port - 1][i], &gid, sizeof gid)) {
1011 hits[i] = 1;
1012 found = 1;
1013 break;
1014 }
1015 }
1016
1017 if (!found) {
1018 if (tmp == ndev &&
1019 (memcmp(&dev->iboe.gid_table[port - 1][0],
1020 &gid, sizeof gid) ||
1021 !memcmp(&dev->iboe.gid_table[port - 1][0],
1022 &zgid, sizeof gid))) {
1023 dev->iboe.gid_table[port - 1][0] = gid;
1024 ++need_update;
1025 hits[0] = 1;
1026 } else if (free >= 0) {
1027 dev->iboe.gid_table[port - 1][free] = gid;
1028 hits[free] = 1;
1029 ++need_update;
1030 }
1031 }
1032 }
1033 }
1034 rcu_read_unlock();
1035
1036 for (i = 0; i < 128; ++i)
1037 if (!hits[i]) {
1038 if (memcmp(&dev->iboe.gid_table[port - 1][i], &zgid, sizeof zgid))
1039 ++need_update;
1040 dev->iboe.gid_table[port - 1][i] = zgid;
1041 }
1042
1043 if (need_update) {
1044 memcpy(work->gids, dev->iboe.gid_table[port - 1], sizeof work->gids);
1045 INIT_WORK(&work->work, update_gids_task);
1046 work->port = port;
1047 work->dev = dev;
1048 queue_work(wq, &work->work);
1049 } else
1050 kfree(work);
1051
1052 kfree(hits);
1053 return 0;
1054
1055 out:
1056 kfree(work);
1057 return ret;
1058 }
1059
1060 static void handle_en_event(struct mlx4_ib_dev *dev, int port, unsigned long event)
1061 {
1062 switch (event) {
1063 case NETDEV_UP:
1064 case NETDEV_CHANGEADDR:
1065 update_ipv6_gids(dev, port, 0);
1066 break;
1067
1068 case NETDEV_DOWN:
1069 update_ipv6_gids(dev, port, 1);
1070 dev->iboe.netdevs[port - 1] = NULL;
1071 }
1072 }
1073
1074 static void netdev_added(struct mlx4_ib_dev *dev, int port)
1075 {
1076 update_ipv6_gids(dev, port, 0);
1077 }
1078
1079 static void netdev_removed(struct mlx4_ib_dev *dev, int port)
1080 {
1081 update_ipv6_gids(dev, port, 1);
1082 }
1083
1084 static int mlx4_ib_netdev_event(struct notifier_block *this, unsigned long event,
1085 void *ptr)
1086 {
1087 struct net_device *dev = ptr;
1088 struct mlx4_ib_dev *ibdev;
1089 struct net_device *oldnd;
1090 struct mlx4_ib_iboe *iboe;
1091 int port;
1092
1093 if (!net_eq(dev_net(dev), &init_net))
1094 return NOTIFY_DONE;
1095
1096 ibdev = container_of(this, struct mlx4_ib_dev, iboe.nb);
1097 iboe = &ibdev->iboe;
1098
1099 spin_lock(&iboe->lock);
1100 mlx4_foreach_ib_transport_port(port, ibdev->dev) {
1101 oldnd = iboe->netdevs[port - 1];
1102 iboe->netdevs[port - 1] =
1103 mlx4_get_protocol_dev(ibdev->dev, MLX4_PROT_ETH, port);
1104 if (oldnd != iboe->netdevs[port - 1]) {
1105 if (iboe->netdevs[port - 1])
1106 netdev_added(ibdev, port);
1107 else
1108 netdev_removed(ibdev, port);
1109 }
1110 }
1111
1112 if (dev == iboe->netdevs[0] ||
1113 (iboe->netdevs[0] && rdma_vlan_dev_real_dev(dev) == iboe->netdevs[0]))
1114 handle_en_event(ibdev, 1, event);
1115 else if (dev == iboe->netdevs[1]
1116 || (iboe->netdevs[1] && rdma_vlan_dev_real_dev(dev) == iboe->netdevs[1]))
1117 handle_en_event(ibdev, 2, event);
1118
1119 spin_unlock(&iboe->lock);
1120
1121 return NOTIFY_DONE;
1122 }
1123
1124 static void mlx4_ib_alloc_eqs(struct mlx4_dev *dev, struct mlx4_ib_dev *ibdev)
1125 {
1126 char name[32];
1127 int eq_per_port = 0;
1128 int added_eqs = 0;
1129 int total_eqs = 0;
1130 int i, j, eq;
1131
1132 /* Legacy mode or comp_pool is not large enough */
1133 if (dev->caps.comp_pool == 0 ||
1134 dev->caps.num_ports > dev->caps.comp_pool)
1135 return;
1136
1137 eq_per_port = rounddown_pow_of_two(dev->caps.comp_pool/
1138 dev->caps.num_ports);
1139
1140 /* Init eq table */
1141 added_eqs = 0;
1142 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_IB)
1143 added_eqs += eq_per_port;
1144
1145 total_eqs = dev->caps.num_comp_vectors + added_eqs;
1146
1147 ibdev->eq_table = kzalloc(total_eqs * sizeof(int), GFP_KERNEL);
1148 if (!ibdev->eq_table)
1149 return;
1150
1151 ibdev->eq_added = added_eqs;
1152
1153 eq = 0;
1154 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_IB) {
1155 for (j = 0; j < eq_per_port; j++) {
1156 sprintf(name, "mlx4-ib-%d-%d@%s",
1157 i, j, dev->pdev->bus->name);
1158 /* Set IRQ for specific name (per ring) */
1159 if (mlx4_assign_eq(dev, name, NULL,
1160 &ibdev->eq_table[eq])) {
1161 /* Use legacy (same as mlx4_en driver) */
1162 pr_warn("Can't allocate EQ %d; reverting to legacy\n", eq);
1163 ibdev->eq_table[eq] =
1164 (eq % dev->caps.num_comp_vectors);
1165 }
1166 eq++;
1167 }
1168 }
1169
1170 /* Fill the reset of the vector with legacy EQ */
1171 for (i = 0, eq = added_eqs; i < dev->caps.num_comp_vectors; i++)
1172 ibdev->eq_table[eq++] = i;
1173
1174 /* Advertise the new number of EQs to clients */
1175 ibdev->ib_dev.num_comp_vectors = total_eqs;
1176 }
1177
1178 static void mlx4_ib_free_eqs(struct mlx4_dev *dev, struct mlx4_ib_dev *ibdev)
1179 {
1180 int i;
1181
1182 /* no additional eqs were added */
1183 if (!ibdev->eq_table)
1184 return;
1185
1186 /* Reset the advertised EQ number */
1187 ibdev->ib_dev.num_comp_vectors = dev->caps.num_comp_vectors;
1188
1189 /* Free only the added eqs */
1190 for (i = 0; i < ibdev->eq_added; i++) {
1191 /* Don't free legacy eqs if used */
1192 if (ibdev->eq_table[i] <= dev->caps.num_comp_vectors)
1193 continue;
1194 mlx4_release_eq(dev, ibdev->eq_table[i]);
1195 }
1196
1197 kfree(ibdev->eq_table);
1198 }
1199
1200 static void *mlx4_ib_add(struct mlx4_dev *dev)
1201 {
1202 struct mlx4_ib_dev *ibdev;
1203 int num_ports = 0;
1204 int i, j;
1205 int err;
1206 struct mlx4_ib_iboe *iboe;
1207
1208 pr_info_once("%s", mlx4_ib_version);
1209
1210 if (mlx4_is_mfunc(dev)) {
1211 pr_warn("IB not yet supported in SRIOV\n");
1212 return NULL;
1213 }
1214
1215 mlx4_foreach_ib_transport_port(i, dev)
1216 num_ports++;
1217
1218 /* No point in registering a device with no ports... */
1219 if (num_ports == 0)
1220 return NULL;
1221
1222 ibdev = (struct mlx4_ib_dev *) ib_alloc_device(sizeof *ibdev);
1223 if (!ibdev) {
1224 dev_err(&dev->pdev->dev, "Device struct alloc failed\n");
1225 return NULL;
1226 }
1227
1228 iboe = &ibdev->iboe;
1229
1230 if (mlx4_pd_alloc(dev, &ibdev->priv_pdn))
1231 goto err_dealloc;
1232
1233 if (mlx4_uar_alloc(dev, &ibdev->priv_uar))
1234 goto err_pd;
1235
1236 ibdev->uar_map = ioremap((phys_addr_t) ibdev->priv_uar.pfn << PAGE_SHIFT,
1237 PAGE_SIZE);
1238 if (!ibdev->uar_map)
1239 goto err_uar;
1240 MLX4_INIT_DOORBELL_LOCK(&ibdev->uar_lock);
1241
1242 ibdev->dev = dev;
1243
1244 strlcpy(ibdev->ib_dev.name, "mlx4_%d", IB_DEVICE_NAME_MAX);
1245 ibdev->ib_dev.owner = THIS_MODULE;
1246 ibdev->ib_dev.node_type = RDMA_NODE_IB_CA;
1247 ibdev->ib_dev.local_dma_lkey = dev->caps.reserved_lkey;
1248 ibdev->num_ports = num_ports;
1249 ibdev->ib_dev.phys_port_cnt = ibdev->num_ports;
1250 ibdev->ib_dev.num_comp_vectors = dev->caps.num_comp_vectors;
1251 ibdev->ib_dev.dma_device = &dev->pdev->dev;
1252
1253 ibdev->ib_dev.uverbs_abi_ver = MLX4_IB_UVERBS_ABI_VERSION;
1254 ibdev->ib_dev.uverbs_cmd_mask =
1255 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
1256 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
1257 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
1258 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
1259 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
1260 (1ull << IB_USER_VERBS_CMD_REG_MR) |
1261 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
1262 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
1263 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
1264 (1ull << IB_USER_VERBS_CMD_RESIZE_CQ) |
1265 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
1266 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
1267 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
1268 (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
1269 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
1270 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) |
1271 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST) |
1272 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
1273 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
1274 (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
1275 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ) |
1276 (1ull << IB_USER_VERBS_CMD_CREATE_XSRQ) |
1277 (1ull << IB_USER_VERBS_CMD_OPEN_QP);
1278
1279 ibdev->ib_dev.query_device = mlx4_ib_query_device;
1280 ibdev->ib_dev.query_port = mlx4_ib_query_port;
1281 ibdev->ib_dev.get_link_layer = mlx4_ib_port_link_layer;
1282 ibdev->ib_dev.query_gid = mlx4_ib_query_gid;
1283 ibdev->ib_dev.query_pkey = mlx4_ib_query_pkey;
1284 ibdev->ib_dev.modify_device = mlx4_ib_modify_device;
1285 ibdev->ib_dev.modify_port = mlx4_ib_modify_port;
1286 ibdev->ib_dev.alloc_ucontext = mlx4_ib_alloc_ucontext;
1287 ibdev->ib_dev.dealloc_ucontext = mlx4_ib_dealloc_ucontext;
1288 ibdev->ib_dev.mmap = mlx4_ib_mmap;
1289 ibdev->ib_dev.alloc_pd = mlx4_ib_alloc_pd;
1290 ibdev->ib_dev.dealloc_pd = mlx4_ib_dealloc_pd;
1291 ibdev->ib_dev.create_ah = mlx4_ib_create_ah;
1292 ibdev->ib_dev.query_ah = mlx4_ib_query_ah;
1293 ibdev->ib_dev.destroy_ah = mlx4_ib_destroy_ah;
1294 ibdev->ib_dev.create_srq = mlx4_ib_create_srq;
1295 ibdev->ib_dev.modify_srq = mlx4_ib_modify_srq;
1296 ibdev->ib_dev.query_srq = mlx4_ib_query_srq;
1297 ibdev->ib_dev.destroy_srq = mlx4_ib_destroy_srq;
1298 ibdev->ib_dev.post_srq_recv = mlx4_ib_post_srq_recv;
1299 ibdev->ib_dev.create_qp = mlx4_ib_create_qp;
1300 ibdev->ib_dev.modify_qp = mlx4_ib_modify_qp;
1301 ibdev->ib_dev.query_qp = mlx4_ib_query_qp;
1302 ibdev->ib_dev.destroy_qp = mlx4_ib_destroy_qp;
1303 ibdev->ib_dev.post_send = mlx4_ib_post_send;
1304 ibdev->ib_dev.post_recv = mlx4_ib_post_recv;
1305 ibdev->ib_dev.create_cq = mlx4_ib_create_cq;
1306 ibdev->ib_dev.modify_cq = mlx4_ib_modify_cq;
1307 ibdev->ib_dev.resize_cq = mlx4_ib_resize_cq;
1308 ibdev->ib_dev.destroy_cq = mlx4_ib_destroy_cq;
1309 ibdev->ib_dev.poll_cq = mlx4_ib_poll_cq;
1310 ibdev->ib_dev.req_notify_cq = mlx4_ib_arm_cq;
1311 ibdev->ib_dev.get_dma_mr = mlx4_ib_get_dma_mr;
1312 ibdev->ib_dev.reg_user_mr = mlx4_ib_reg_user_mr;
1313 ibdev->ib_dev.dereg_mr = mlx4_ib_dereg_mr;
1314 ibdev->ib_dev.alloc_fast_reg_mr = mlx4_ib_alloc_fast_reg_mr;
1315 ibdev->ib_dev.alloc_fast_reg_page_list = mlx4_ib_alloc_fast_reg_page_list;
1316 ibdev->ib_dev.free_fast_reg_page_list = mlx4_ib_free_fast_reg_page_list;
1317 ibdev->ib_dev.attach_mcast = mlx4_ib_mcg_attach;
1318 ibdev->ib_dev.detach_mcast = mlx4_ib_mcg_detach;
1319 ibdev->ib_dev.process_mad = mlx4_ib_process_mad;
1320
1321 ibdev->ib_dev.alloc_fmr = mlx4_ib_fmr_alloc;
1322 ibdev->ib_dev.map_phys_fmr = mlx4_ib_map_phys_fmr;
1323 ibdev->ib_dev.unmap_fmr = mlx4_ib_unmap_fmr;
1324 ibdev->ib_dev.dealloc_fmr = mlx4_ib_fmr_dealloc;
1325
1326 if (dev->caps.flags & MLX4_DEV_CAP_FLAG_XRC) {
1327 ibdev->ib_dev.alloc_xrcd = mlx4_ib_alloc_xrcd;
1328 ibdev->ib_dev.dealloc_xrcd = mlx4_ib_dealloc_xrcd;
1329 ibdev->ib_dev.uverbs_cmd_mask |=
1330 (1ull << IB_USER_VERBS_CMD_OPEN_XRCD) |
1331 (1ull << IB_USER_VERBS_CMD_CLOSE_XRCD);
1332 }
1333
1334 mlx4_ib_alloc_eqs(dev, ibdev);
1335
1336 spin_lock_init(&iboe->lock);
1337
1338 if (init_node_data(ibdev))
1339 goto err_map;
1340
1341 for (i = 0; i < ibdev->num_ports; ++i) {
1342 if (mlx4_ib_port_link_layer(&ibdev->ib_dev, i + 1) ==
1343 IB_LINK_LAYER_ETHERNET) {
1344 err = mlx4_counter_alloc(ibdev->dev, &ibdev->counters[i]);
1345 if (err)
1346 ibdev->counters[i] = -1;
1347 } else
1348 ibdev->counters[i] = -1;
1349 }
1350
1351 spin_lock_init(&ibdev->sm_lock);
1352 mutex_init(&ibdev->cap_mask_mutex);
1353
1354 if (ib_register_device(&ibdev->ib_dev, NULL))
1355 goto err_counter;
1356
1357 if (mlx4_ib_mad_init(ibdev))
1358 goto err_reg;
1359
1360 if (dev->caps.flags & MLX4_DEV_CAP_FLAG_IBOE && !iboe->nb.notifier_call) {
1361 iboe->nb.notifier_call = mlx4_ib_netdev_event;
1362 err = register_netdevice_notifier(&iboe->nb);
1363 if (err)
1364 goto err_reg;
1365 }
1366
1367 for (j = 0; j < ARRAY_SIZE(mlx4_class_attributes); ++j) {
1368 if (device_create_file(&ibdev->ib_dev.dev,
1369 mlx4_class_attributes[j]))
1370 goto err_notif;
1371 }
1372
1373 ibdev->ib_active = true;
1374
1375 return ibdev;
1376
1377 err_notif:
1378 if (unregister_netdevice_notifier(&ibdev->iboe.nb))
1379 pr_warn("failure unregistering notifier\n");
1380 flush_workqueue(wq);
1381
1382 err_reg:
1383 ib_unregister_device(&ibdev->ib_dev);
1384
1385 err_counter:
1386 for (; i; --i)
1387 if (ibdev->counters[i - 1] != -1)
1388 mlx4_counter_free(ibdev->dev, ibdev->counters[i - 1]);
1389
1390 err_map:
1391 iounmap(ibdev->uar_map);
1392
1393 err_uar:
1394 mlx4_uar_free(dev, &ibdev->priv_uar);
1395
1396 err_pd:
1397 mlx4_pd_free(dev, ibdev->priv_pdn);
1398
1399 err_dealloc:
1400 ib_dealloc_device(&ibdev->ib_dev);
1401
1402 return NULL;
1403 }
1404
1405 static void mlx4_ib_remove(struct mlx4_dev *dev, void *ibdev_ptr)
1406 {
1407 struct mlx4_ib_dev *ibdev = ibdev_ptr;
1408 int p;
1409
1410 mlx4_ib_mad_cleanup(ibdev);
1411 ib_unregister_device(&ibdev->ib_dev);
1412 if (ibdev->iboe.nb.notifier_call) {
1413 if (unregister_netdevice_notifier(&ibdev->iboe.nb))
1414 pr_warn("failure unregistering notifier\n");
1415 ibdev->iboe.nb.notifier_call = NULL;
1416 }
1417 iounmap(ibdev->uar_map);
1418 for (p = 0; p < ibdev->num_ports; ++p)
1419 if (ibdev->counters[p] != -1)
1420 mlx4_counter_free(ibdev->dev, ibdev->counters[p]);
1421 mlx4_foreach_port(p, dev, MLX4_PORT_TYPE_IB)
1422 mlx4_CLOSE_PORT(dev, p);
1423
1424 mlx4_ib_free_eqs(dev, ibdev);
1425
1426 mlx4_uar_free(dev, &ibdev->priv_uar);
1427 mlx4_pd_free(dev, ibdev->priv_pdn);
1428 ib_dealloc_device(&ibdev->ib_dev);
1429 }
1430
1431 static void mlx4_ib_event(struct mlx4_dev *dev, void *ibdev_ptr,
1432 enum mlx4_dev_event event, unsigned long param)
1433 {
1434 struct ib_event ibev;
1435 struct mlx4_ib_dev *ibdev = to_mdev((struct ib_device *) ibdev_ptr);
1436 struct mlx4_eqe *eqe = NULL;
1437 struct ib_event_work *ew;
1438 int port = 0;
1439
1440 if (event == MLX4_DEV_EVENT_PORT_MGMT_CHANGE)
1441 eqe = (struct mlx4_eqe *)param;
1442 else
1443 port = (u8)param;
1444
1445 if (port > ibdev->num_ports)
1446 return;
1447
1448 switch (event) {
1449 case MLX4_DEV_EVENT_PORT_UP:
1450 ibev.event = IB_EVENT_PORT_ACTIVE;
1451 break;
1452
1453 case MLX4_DEV_EVENT_PORT_DOWN:
1454 ibev.event = IB_EVENT_PORT_ERR;
1455 break;
1456
1457 case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
1458 ibdev->ib_active = false;
1459 ibev.event = IB_EVENT_DEVICE_FATAL;
1460 break;
1461
1462 case MLX4_DEV_EVENT_PORT_MGMT_CHANGE:
1463 ew = kmalloc(sizeof *ew, GFP_ATOMIC);
1464 if (!ew) {
1465 pr_err("failed to allocate memory for events work\n");
1466 break;
1467 }
1468
1469 INIT_WORK(&ew->work, handle_port_mgmt_change_event);
1470 memcpy(&ew->ib_eqe, eqe, sizeof *eqe);
1471 ew->ib_dev = ibdev;
1472 handle_port_mgmt_change_event(&ew->work);
1473 return;
1474
1475 default:
1476 return;
1477 }
1478
1479 ibev.device = ibdev_ptr;
1480 ibev.element.port_num = port;
1481
1482 ib_dispatch_event(&ibev);
1483 }
1484
1485 static struct mlx4_interface mlx4_ib_interface = {
1486 .add = mlx4_ib_add,
1487 .remove = mlx4_ib_remove,
1488 .event = mlx4_ib_event,
1489 .protocol = MLX4_PROT_IB_IPV6
1490 };
1491
1492 static int __init mlx4_ib_init(void)
1493 {
1494 int err;
1495
1496 wq = create_singlethread_workqueue("mlx4_ib");
1497 if (!wq)
1498 return -ENOMEM;
1499
1500 err = mlx4_register_interface(&mlx4_ib_interface);
1501 if (err) {
1502 destroy_workqueue(wq);
1503 return err;
1504 }
1505
1506 return 0;
1507 }
1508
1509 static void __exit mlx4_ib_cleanup(void)
1510 {
1511 mlx4_unregister_interface(&mlx4_ib_interface);
1512 destroy_workqueue(wq);
1513 }
1514
1515 module_init(mlx4_ib_init);
1516 module_exit(mlx4_ib_cleanup);
Linux kernel - Deliverables
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