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cfdda9d7 SW |
1 | /* |
2 | * Copyright (c) 2009-2010 Chelsio, Inc. All rights reserved. | |
3 | * | |
4 | * This software is available to you under a choice of one of two | |
5 | * licenses. You may choose to be licensed under the terms of the GNU | |
6 | * General Public License (GPL) Version 2, available from the file | |
7 | * COPYING in the main directory of this source tree, or the | |
8 | * OpenIB.org BSD license below: | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or | |
11 | * without modification, are permitted provided that the following | |
12 | * conditions are met: | |
13 | * | |
14 | * - Redistributions of source code must retain the above | |
15 | * copyright notice, this list of conditions and the following | |
16 | * disclaimer. | |
17 | * | |
18 | * - Redistributions in binary form must reproduce the above | |
19 | * copyright notice, this list of conditions and the following | |
20 | * disclaimer in the documentation and/or other materials | |
21 | * provided with the distribution. | |
22 | * | |
23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
30 | * SOFTWARE. | |
31 | */ | |
32 | #include <linux/module.h> | |
33 | #include <linux/moduleparam.h> | |
34 | #include <linux/debugfs.h> | |
35 | ||
36 | #include <rdma/ib_verbs.h> | |
37 | ||
38 | #include "iw_cxgb4.h" | |
39 | ||
40 | #define DRV_VERSION "0.1" | |
41 | ||
42 | MODULE_AUTHOR("Steve Wise"); | |
43 | MODULE_DESCRIPTION("Chelsio T4 RDMA Driver"); | |
44 | MODULE_LICENSE("Dual BSD/GPL"); | |
45 | MODULE_VERSION(DRV_VERSION); | |
46 | ||
47 | static LIST_HEAD(dev_list); | |
48 | static DEFINE_MUTEX(dev_mutex); | |
49 | ||
50 | static struct dentry *c4iw_debugfs_root; | |
51 | ||
9e8d1fa3 | 52 | struct c4iw_debugfs_data { |
cfdda9d7 SW |
53 | struct c4iw_dev *devp; |
54 | char *buf; | |
55 | int bufsize; | |
56 | int pos; | |
57 | }; | |
58 | ||
9e8d1fa3 | 59 | static int count_idrs(int id, void *p, void *data) |
cfdda9d7 | 60 | { |
cfdda9d7 SW |
61 | int *countp = data; |
62 | ||
cfdda9d7 SW |
63 | *countp = *countp + 1; |
64 | return 0; | |
65 | } | |
66 | ||
9e8d1fa3 SW |
67 | static ssize_t debugfs_read(struct file *file, char __user *buf, size_t count, |
68 | loff_t *ppos) | |
69 | { | |
70 | struct c4iw_debugfs_data *d = file->private_data; | |
71 | loff_t pos = *ppos; | |
72 | loff_t avail = d->pos; | |
73 | ||
74 | if (pos < 0) | |
75 | return -EINVAL; | |
76 | if (pos >= avail) | |
77 | return 0; | |
78 | if (count > avail - pos) | |
79 | count = avail - pos; | |
80 | ||
81 | while (count) { | |
82 | size_t len = 0; | |
83 | ||
84 | len = min((int)count, (int)d->pos - (int)pos); | |
85 | if (copy_to_user(buf, d->buf + pos, len)) | |
86 | return -EFAULT; | |
87 | if (len == 0) | |
88 | return -EINVAL; | |
89 | ||
90 | buf += len; | |
91 | pos += len; | |
92 | count -= len; | |
93 | } | |
94 | count = pos - *ppos; | |
95 | *ppos = pos; | |
96 | return count; | |
97 | } | |
98 | ||
99 | static int dump_qp(int id, void *p, void *data) | |
cfdda9d7 SW |
100 | { |
101 | struct c4iw_qp *qp = p; | |
9e8d1fa3 | 102 | struct c4iw_debugfs_data *qpd = data; |
cfdda9d7 SW |
103 | int space; |
104 | int cc; | |
105 | ||
106 | if (id != qp->wq.sq.qid) | |
107 | return 0; | |
108 | ||
109 | space = qpd->bufsize - qpd->pos - 1; | |
110 | if (space == 0) | |
111 | return 1; | |
112 | ||
113 | if (qp->ep) | |
114 | cc = snprintf(qpd->buf + qpd->pos, space, "qp id %u state %u " | |
115 | "ep tid %u state %u %pI4:%u->%pI4:%u\n", | |
116 | qp->wq.sq.qid, (int)qp->attr.state, | |
117 | qp->ep->hwtid, (int)qp->ep->com.state, | |
118 | &qp->ep->com.local_addr.sin_addr.s_addr, | |
119 | ntohs(qp->ep->com.local_addr.sin_port), | |
120 | &qp->ep->com.remote_addr.sin_addr.s_addr, | |
121 | ntohs(qp->ep->com.remote_addr.sin_port)); | |
122 | else | |
123 | cc = snprintf(qpd->buf + qpd->pos, space, "qp id %u state %u\n", | |
124 | qp->wq.sq.qid, (int)qp->attr.state); | |
125 | if (cc < space) | |
126 | qpd->pos += cc; | |
127 | return 0; | |
128 | } | |
129 | ||
130 | static int qp_release(struct inode *inode, struct file *file) | |
131 | { | |
9e8d1fa3 | 132 | struct c4iw_debugfs_data *qpd = file->private_data; |
cfdda9d7 SW |
133 | if (!qpd) { |
134 | printk(KERN_INFO "%s null qpd?\n", __func__); | |
135 | return 0; | |
136 | } | |
137 | kfree(qpd->buf); | |
138 | kfree(qpd); | |
139 | return 0; | |
140 | } | |
141 | ||
142 | static int qp_open(struct inode *inode, struct file *file) | |
143 | { | |
9e8d1fa3 | 144 | struct c4iw_debugfs_data *qpd; |
cfdda9d7 SW |
145 | int ret = 0; |
146 | int count = 1; | |
147 | ||
148 | qpd = kmalloc(sizeof *qpd, GFP_KERNEL); | |
149 | if (!qpd) { | |
150 | ret = -ENOMEM; | |
151 | goto out; | |
152 | } | |
153 | qpd->devp = inode->i_private; | |
154 | qpd->pos = 0; | |
155 | ||
156 | spin_lock_irq(&qpd->devp->lock); | |
9e8d1fa3 | 157 | idr_for_each(&qpd->devp->qpidr, count_idrs, &count); |
cfdda9d7 SW |
158 | spin_unlock_irq(&qpd->devp->lock); |
159 | ||
160 | qpd->bufsize = count * 128; | |
161 | qpd->buf = kmalloc(qpd->bufsize, GFP_KERNEL); | |
162 | if (!qpd->buf) { | |
163 | ret = -ENOMEM; | |
164 | goto err1; | |
165 | } | |
166 | ||
167 | spin_lock_irq(&qpd->devp->lock); | |
9e8d1fa3 | 168 | idr_for_each(&qpd->devp->qpidr, dump_qp, qpd); |
cfdda9d7 SW |
169 | spin_unlock_irq(&qpd->devp->lock); |
170 | ||
171 | qpd->buf[qpd->pos++] = 0; | |
172 | file->private_data = qpd; | |
173 | goto out; | |
174 | err1: | |
175 | kfree(qpd); | |
176 | out: | |
177 | return ret; | |
178 | } | |
179 | ||
9e8d1fa3 SW |
180 | static const struct file_operations qp_debugfs_fops = { |
181 | .owner = THIS_MODULE, | |
182 | .open = qp_open, | |
183 | .release = qp_release, | |
184 | .read = debugfs_read, | |
185 | }; | |
186 | ||
187 | static int dump_stag(int id, void *p, void *data) | |
cfdda9d7 | 188 | { |
9e8d1fa3 SW |
189 | struct c4iw_debugfs_data *stagd = data; |
190 | int space; | |
191 | int cc; | |
cfdda9d7 | 192 | |
9e8d1fa3 SW |
193 | space = stagd->bufsize - stagd->pos - 1; |
194 | if (space == 0) | |
195 | return 1; | |
196 | ||
197 | cc = snprintf(stagd->buf + stagd->pos, space, "0x%x\n", id<<8); | |
198 | if (cc < space) | |
199 | stagd->pos += cc; | |
200 | return 0; | |
201 | } | |
202 | ||
203 | static int stag_release(struct inode *inode, struct file *file) | |
204 | { | |
205 | struct c4iw_debugfs_data *stagd = file->private_data; | |
206 | if (!stagd) { | |
207 | printk(KERN_INFO "%s null stagd?\n", __func__); | |
cfdda9d7 | 208 | return 0; |
9e8d1fa3 SW |
209 | } |
210 | kfree(stagd->buf); | |
211 | kfree(stagd); | |
212 | return 0; | |
213 | } | |
cfdda9d7 | 214 | |
9e8d1fa3 SW |
215 | static int stag_open(struct inode *inode, struct file *file) |
216 | { | |
217 | struct c4iw_debugfs_data *stagd; | |
218 | int ret = 0; | |
219 | int count = 1; | |
cfdda9d7 | 220 | |
9e8d1fa3 SW |
221 | stagd = kmalloc(sizeof *stagd, GFP_KERNEL); |
222 | if (!stagd) { | |
223 | ret = -ENOMEM; | |
224 | goto out; | |
225 | } | |
226 | stagd->devp = inode->i_private; | |
227 | stagd->pos = 0; | |
cfdda9d7 | 228 | |
9e8d1fa3 SW |
229 | spin_lock_irq(&stagd->devp->lock); |
230 | idr_for_each(&stagd->devp->mmidr, count_idrs, &count); | |
231 | spin_unlock_irq(&stagd->devp->lock); | |
232 | ||
233 | stagd->bufsize = count * sizeof("0x12345678\n"); | |
234 | stagd->buf = kmalloc(stagd->bufsize, GFP_KERNEL); | |
235 | if (!stagd->buf) { | |
236 | ret = -ENOMEM; | |
237 | goto err1; | |
cfdda9d7 | 238 | } |
9e8d1fa3 SW |
239 | |
240 | spin_lock_irq(&stagd->devp->lock); | |
241 | idr_for_each(&stagd->devp->mmidr, dump_stag, stagd); | |
242 | spin_unlock_irq(&stagd->devp->lock); | |
243 | ||
244 | stagd->buf[stagd->pos++] = 0; | |
245 | file->private_data = stagd; | |
246 | goto out; | |
247 | err1: | |
248 | kfree(stagd); | |
249 | out: | |
250 | return ret; | |
cfdda9d7 SW |
251 | } |
252 | ||
9e8d1fa3 | 253 | static const struct file_operations stag_debugfs_fops = { |
cfdda9d7 | 254 | .owner = THIS_MODULE, |
9e8d1fa3 SW |
255 | .open = stag_open, |
256 | .release = stag_release, | |
257 | .read = debugfs_read, | |
cfdda9d7 SW |
258 | }; |
259 | ||
260 | static int setup_debugfs(struct c4iw_dev *devp) | |
261 | { | |
262 | struct dentry *de; | |
263 | ||
264 | if (!devp->debugfs_root) | |
265 | return -1; | |
266 | ||
267 | de = debugfs_create_file("qps", S_IWUSR, devp->debugfs_root, | |
268 | (void *)devp, &qp_debugfs_fops); | |
269 | if (de && de->d_inode) | |
270 | de->d_inode->i_size = 4096; | |
9e8d1fa3 SW |
271 | |
272 | de = debugfs_create_file("stags", S_IWUSR, devp->debugfs_root, | |
273 | (void *)devp, &stag_debugfs_fops); | |
274 | if (de && de->d_inode) | |
275 | de->d_inode->i_size = 4096; | |
cfdda9d7 SW |
276 | return 0; |
277 | } | |
278 | ||
279 | void c4iw_release_dev_ucontext(struct c4iw_rdev *rdev, | |
280 | struct c4iw_dev_ucontext *uctx) | |
281 | { | |
282 | struct list_head *pos, *nxt; | |
283 | struct c4iw_qid_list *entry; | |
284 | ||
285 | mutex_lock(&uctx->lock); | |
286 | list_for_each_safe(pos, nxt, &uctx->qpids) { | |
287 | entry = list_entry(pos, struct c4iw_qid_list, entry); | |
288 | list_del_init(&entry->entry); | |
289 | if (!(entry->qid & rdev->qpmask)) | |
290 | c4iw_put_resource(&rdev->resource.qid_fifo, entry->qid, | |
291 | &rdev->resource.qid_fifo_lock); | |
292 | kfree(entry); | |
293 | } | |
294 | ||
295 | list_for_each_safe(pos, nxt, &uctx->qpids) { | |
296 | entry = list_entry(pos, struct c4iw_qid_list, entry); | |
297 | list_del_init(&entry->entry); | |
298 | kfree(entry); | |
299 | } | |
300 | mutex_unlock(&uctx->lock); | |
301 | } | |
302 | ||
303 | void c4iw_init_dev_ucontext(struct c4iw_rdev *rdev, | |
304 | struct c4iw_dev_ucontext *uctx) | |
305 | { | |
306 | INIT_LIST_HEAD(&uctx->qpids); | |
307 | INIT_LIST_HEAD(&uctx->cqids); | |
308 | mutex_init(&uctx->lock); | |
309 | } | |
310 | ||
311 | /* Caller takes care of locking if needed */ | |
312 | static int c4iw_rdev_open(struct c4iw_rdev *rdev) | |
313 | { | |
314 | int err; | |
315 | ||
316 | c4iw_init_dev_ucontext(rdev, &rdev->uctx); | |
317 | ||
318 | /* | |
319 | * qpshift is the number of bits to shift the qpid left in order | |
320 | * to get the correct address of the doorbell for that qp. | |
321 | */ | |
322 | rdev->qpshift = PAGE_SHIFT - ilog2(rdev->lldi.udb_density); | |
323 | rdev->qpmask = rdev->lldi.udb_density - 1; | |
324 | rdev->cqshift = PAGE_SHIFT - ilog2(rdev->lldi.ucq_density); | |
325 | rdev->cqmask = rdev->lldi.ucq_density - 1; | |
326 | PDBG("%s dev %s stag start 0x%0x size 0x%0x num stags %d " | |
93fb72e4 SW |
327 | "pbl start 0x%0x size 0x%0x rq start 0x%0x size 0x%0x " |
328 | "qp qid start %u size %u cq qid start %u size %u\n", | |
cfdda9d7 SW |
329 | __func__, pci_name(rdev->lldi.pdev), rdev->lldi.vr->stag.start, |
330 | rdev->lldi.vr->stag.size, c4iw_num_stags(rdev), | |
331 | rdev->lldi.vr->pbl.start, | |
332 | rdev->lldi.vr->pbl.size, rdev->lldi.vr->rq.start, | |
93fb72e4 SW |
333 | rdev->lldi.vr->rq.size, |
334 | rdev->lldi.vr->qp.start, | |
335 | rdev->lldi.vr->qp.size, | |
336 | rdev->lldi.vr->cq.start, | |
337 | rdev->lldi.vr->cq.size); | |
cfdda9d7 SW |
338 | PDBG("udb len 0x%x udb base %p db_reg %p gts_reg %p qpshift %lu " |
339 | "qpmask 0x%x cqshift %lu cqmask 0x%x\n", | |
340 | (unsigned)pci_resource_len(rdev->lldi.pdev, 2), | |
341 | (void *)pci_resource_start(rdev->lldi.pdev, 2), | |
342 | rdev->lldi.db_reg, | |
343 | rdev->lldi.gts_reg, | |
344 | rdev->qpshift, rdev->qpmask, | |
345 | rdev->cqshift, rdev->cqmask); | |
346 | ||
347 | if (c4iw_num_stags(rdev) == 0) { | |
348 | err = -EINVAL; | |
349 | goto err1; | |
350 | } | |
351 | ||
352 | err = c4iw_init_resource(rdev, c4iw_num_stags(rdev), T4_MAX_NUM_PD); | |
353 | if (err) { | |
354 | printk(KERN_ERR MOD "error %d initializing resources\n", err); | |
355 | goto err1; | |
356 | } | |
357 | err = c4iw_pblpool_create(rdev); | |
358 | if (err) { | |
359 | printk(KERN_ERR MOD "error %d initializing pbl pool\n", err); | |
360 | goto err2; | |
361 | } | |
362 | err = c4iw_rqtpool_create(rdev); | |
363 | if (err) { | |
364 | printk(KERN_ERR MOD "error %d initializing rqt pool\n", err); | |
365 | goto err3; | |
366 | } | |
c6d7b267 SW |
367 | err = c4iw_ocqp_pool_create(rdev); |
368 | if (err) { | |
369 | printk(KERN_ERR MOD "error %d initializing ocqp pool\n", err); | |
370 | goto err4; | |
371 | } | |
cfdda9d7 | 372 | return 0; |
c6d7b267 SW |
373 | err4: |
374 | c4iw_rqtpool_destroy(rdev); | |
cfdda9d7 SW |
375 | err3: |
376 | c4iw_pblpool_destroy(rdev); | |
377 | err2: | |
378 | c4iw_destroy_resource(&rdev->resource); | |
379 | err1: | |
380 | return err; | |
381 | } | |
382 | ||
383 | static void c4iw_rdev_close(struct c4iw_rdev *rdev) | |
384 | { | |
385 | c4iw_pblpool_destroy(rdev); | |
386 | c4iw_rqtpool_destroy(rdev); | |
387 | c4iw_destroy_resource(&rdev->resource); | |
388 | } | |
389 | ||
390 | static void c4iw_remove(struct c4iw_dev *dev) | |
391 | { | |
392 | PDBG("%s c4iw_dev %p\n", __func__, dev); | |
393 | cancel_delayed_work_sync(&dev->db_drop_task); | |
394 | list_del(&dev->entry); | |
1c01c538 SW |
395 | if (dev->registered) |
396 | c4iw_unregister_device(dev); | |
cfdda9d7 SW |
397 | c4iw_rdev_close(&dev->rdev); |
398 | idr_destroy(&dev->cqidr); | |
399 | idr_destroy(&dev->qpidr); | |
400 | idr_destroy(&dev->mmidr); | |
c6d7b267 | 401 | iounmap(dev->rdev.oc_mw_kva); |
cfdda9d7 SW |
402 | ib_dealloc_device(&dev->ibdev); |
403 | } | |
404 | ||
405 | static struct c4iw_dev *c4iw_alloc(const struct cxgb4_lld_info *infop) | |
406 | { | |
407 | struct c4iw_dev *devp; | |
408 | int ret; | |
409 | ||
410 | devp = (struct c4iw_dev *)ib_alloc_device(sizeof(*devp)); | |
411 | if (!devp) { | |
412 | printk(KERN_ERR MOD "Cannot allocate ib device\n"); | |
413 | return NULL; | |
414 | } | |
415 | devp->rdev.lldi = *infop; | |
416 | ||
c6d7b267 SW |
417 | devp->rdev.oc_mw_pa = pci_resource_start(devp->rdev.lldi.pdev, 2) + |
418 | (pci_resource_len(devp->rdev.lldi.pdev, 2) - | |
419 | roundup_pow_of_two(devp->rdev.lldi.vr->ocq.size)); | |
420 | devp->rdev.oc_mw_kva = ioremap_wc(devp->rdev.oc_mw_pa, | |
421 | devp->rdev.lldi.vr->ocq.size); | |
422 | ||
423 | printk(KERN_INFO MOD "ocq memory: " | |
424 | "hw_start 0x%x size %u mw_pa 0x%lx mw_kva %p\n", | |
425 | devp->rdev.lldi.vr->ocq.start, devp->rdev.lldi.vr->ocq.size, | |
426 | devp->rdev.oc_mw_pa, devp->rdev.oc_mw_kva); | |
427 | ||
cfdda9d7 SW |
428 | mutex_lock(&dev_mutex); |
429 | ||
430 | ret = c4iw_rdev_open(&devp->rdev); | |
431 | if (ret) { | |
432 | mutex_unlock(&dev_mutex); | |
433 | printk(KERN_ERR MOD "Unable to open CXIO rdev err %d\n", ret); | |
434 | ib_dealloc_device(&devp->ibdev); | |
435 | return NULL; | |
436 | } | |
437 | ||
438 | idr_init(&devp->cqidr); | |
439 | idr_init(&devp->qpidr); | |
440 | idr_init(&devp->mmidr); | |
441 | spin_lock_init(&devp->lock); | |
442 | list_add_tail(&devp->entry, &dev_list); | |
443 | mutex_unlock(&dev_mutex); | |
444 | ||
cfdda9d7 SW |
445 | if (c4iw_debugfs_root) { |
446 | devp->debugfs_root = debugfs_create_dir( | |
447 | pci_name(devp->rdev.lldi.pdev), | |
448 | c4iw_debugfs_root); | |
449 | setup_debugfs(devp); | |
450 | } | |
451 | return devp; | |
452 | } | |
453 | ||
454 | static void *c4iw_uld_add(const struct cxgb4_lld_info *infop) | |
455 | { | |
456 | struct c4iw_dev *dev; | |
457 | static int vers_printed; | |
458 | int i; | |
459 | ||
460 | if (!vers_printed++) | |
461 | printk(KERN_INFO MOD "Chelsio T4 RDMA Driver - version %s\n", | |
462 | DRV_VERSION); | |
463 | ||
464 | dev = c4iw_alloc(infop); | |
465 | if (!dev) | |
466 | goto out; | |
467 | ||
468 | PDBG("%s found device %s nchan %u nrxq %u ntxq %u nports %u\n", | |
469 | __func__, pci_name(dev->rdev.lldi.pdev), | |
470 | dev->rdev.lldi.nchan, dev->rdev.lldi.nrxq, | |
471 | dev->rdev.lldi.ntxq, dev->rdev.lldi.nports); | |
472 | ||
473 | for (i = 0; i < dev->rdev.lldi.nrxq; i++) | |
474 | PDBG("rxqid[%u] %u\n", i, dev->rdev.lldi.rxq_ids[i]); | |
cfdda9d7 SW |
475 | out: |
476 | return dev; | |
477 | } | |
478 | ||
479 | static struct sk_buff *t4_pktgl_to_skb(const struct pkt_gl *gl, | |
480 | unsigned int skb_len, | |
481 | unsigned int pull_len) | |
482 | { | |
483 | struct sk_buff *skb; | |
484 | struct skb_shared_info *ssi; | |
485 | ||
486 | if (gl->tot_len <= 512) { | |
487 | skb = alloc_skb(gl->tot_len, GFP_ATOMIC); | |
488 | if (unlikely(!skb)) | |
489 | goto out; | |
490 | __skb_put(skb, gl->tot_len); | |
491 | skb_copy_to_linear_data(skb, gl->va, gl->tot_len); | |
492 | } else { | |
493 | skb = alloc_skb(skb_len, GFP_ATOMIC); | |
494 | if (unlikely(!skb)) | |
495 | goto out; | |
496 | __skb_put(skb, pull_len); | |
497 | skb_copy_to_linear_data(skb, gl->va, pull_len); | |
498 | ||
499 | ssi = skb_shinfo(skb); | |
500 | ssi->frags[0].page = gl->frags[0].page; | |
501 | ssi->frags[0].page_offset = gl->frags[0].page_offset + pull_len; | |
502 | ssi->frags[0].size = gl->frags[0].size - pull_len; | |
503 | if (gl->nfrags > 1) | |
504 | memcpy(&ssi->frags[1], &gl->frags[1], | |
505 | (gl->nfrags - 1) * sizeof(skb_frag_t)); | |
506 | ssi->nr_frags = gl->nfrags; | |
507 | ||
508 | skb->len = gl->tot_len; | |
509 | skb->data_len = skb->len - pull_len; | |
510 | skb->truesize += skb->data_len; | |
511 | ||
512 | /* Get a reference for the last page, we don't own it */ | |
513 | get_page(gl->frags[gl->nfrags - 1].page); | |
514 | } | |
515 | out: | |
516 | return skb; | |
517 | } | |
518 | ||
519 | static int c4iw_uld_rx_handler(void *handle, const __be64 *rsp, | |
520 | const struct pkt_gl *gl) | |
521 | { | |
522 | struct c4iw_dev *dev = handle; | |
523 | struct sk_buff *skb; | |
524 | const struct cpl_act_establish *rpl; | |
525 | unsigned int opcode; | |
526 | ||
527 | if (gl == NULL) { | |
528 | /* omit RSS and rsp_ctrl at end of descriptor */ | |
529 | unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8; | |
530 | ||
531 | skb = alloc_skb(256, GFP_ATOMIC); | |
532 | if (!skb) | |
533 | goto nomem; | |
534 | __skb_put(skb, len); | |
535 | skb_copy_to_linear_data(skb, &rsp[1], len); | |
536 | } else if (gl == CXGB4_MSG_AN) { | |
537 | const struct rsp_ctrl *rc = (void *)rsp; | |
538 | ||
539 | u32 qid = be32_to_cpu(rc->pldbuflen_qid); | |
540 | c4iw_ev_handler(dev, qid); | |
541 | return 0; | |
542 | } else { | |
543 | skb = t4_pktgl_to_skb(gl, 128, 128); | |
544 | if (unlikely(!skb)) | |
545 | goto nomem; | |
546 | } | |
547 | ||
548 | rpl = cplhdr(skb); | |
549 | opcode = rpl->ot.opcode; | |
550 | ||
551 | if (c4iw_handlers[opcode]) | |
552 | c4iw_handlers[opcode](dev, skb); | |
553 | else | |
554 | printk(KERN_INFO "%s no handler opcode 0x%x...\n", __func__, | |
555 | opcode); | |
556 | ||
557 | return 0; | |
558 | nomem: | |
559 | return -1; | |
560 | } | |
561 | ||
562 | static int c4iw_uld_state_change(void *handle, enum cxgb4_state new_state) | |
563 | { | |
1c01c538 SW |
564 | struct c4iw_dev *dev = handle; |
565 | ||
cfdda9d7 | 566 | PDBG("%s new_state %u\n", __func__, new_state); |
1c01c538 SW |
567 | switch (new_state) { |
568 | case CXGB4_STATE_UP: | |
569 | printk(KERN_INFO MOD "%s: Up\n", pci_name(dev->rdev.lldi.pdev)); | |
570 | if (!dev->registered) { | |
571 | int ret; | |
572 | ret = c4iw_register_device(dev); | |
573 | if (ret) | |
574 | printk(KERN_ERR MOD | |
575 | "%s: RDMA registration failed: %d\n", | |
576 | pci_name(dev->rdev.lldi.pdev), ret); | |
577 | } | |
578 | break; | |
579 | case CXGB4_STATE_DOWN: | |
580 | printk(KERN_INFO MOD "%s: Down\n", | |
581 | pci_name(dev->rdev.lldi.pdev)); | |
582 | if (dev->registered) | |
583 | c4iw_unregister_device(dev); | |
584 | break; | |
585 | case CXGB4_STATE_START_RECOVERY: | |
586 | printk(KERN_INFO MOD "%s: Fatal Error\n", | |
587 | pci_name(dev->rdev.lldi.pdev)); | |
588 | if (dev->registered) | |
589 | c4iw_unregister_device(dev); | |
590 | break; | |
591 | case CXGB4_STATE_DETACH: | |
592 | printk(KERN_INFO MOD "%s: Detach\n", | |
593 | pci_name(dev->rdev.lldi.pdev)); | |
594 | mutex_lock(&dev_mutex); | |
595 | c4iw_remove(dev); | |
596 | mutex_unlock(&dev_mutex); | |
597 | break; | |
598 | } | |
cfdda9d7 SW |
599 | return 0; |
600 | } | |
601 | ||
602 | static struct cxgb4_uld_info c4iw_uld_info = { | |
603 | .name = DRV_NAME, | |
604 | .add = c4iw_uld_add, | |
605 | .rx_handler = c4iw_uld_rx_handler, | |
606 | .state_change = c4iw_uld_state_change, | |
607 | }; | |
608 | ||
609 | static int __init c4iw_init_module(void) | |
610 | { | |
611 | int err; | |
612 | ||
613 | err = c4iw_cm_init(); | |
614 | if (err) | |
615 | return err; | |
616 | ||
617 | c4iw_debugfs_root = debugfs_create_dir(DRV_NAME, NULL); | |
618 | if (!c4iw_debugfs_root) | |
619 | printk(KERN_WARNING MOD | |
620 | "could not create debugfs entry, continuing\n"); | |
621 | ||
622 | cxgb4_register_uld(CXGB4_ULD_RDMA, &c4iw_uld_info); | |
623 | ||
624 | return 0; | |
625 | } | |
626 | ||
627 | static void __exit c4iw_exit_module(void) | |
628 | { | |
629 | struct c4iw_dev *dev, *tmp; | |
630 | ||
cfdda9d7 SW |
631 | mutex_lock(&dev_mutex); |
632 | list_for_each_entry_safe(dev, tmp, &dev_list, entry) { | |
633 | c4iw_remove(dev); | |
634 | } | |
635 | mutex_unlock(&dev_mutex); | |
fd388ce6 | 636 | cxgb4_unregister_uld(CXGB4_ULD_RDMA); |
cfdda9d7 SW |
637 | c4iw_cm_term(); |
638 | debugfs_remove_recursive(c4iw_debugfs_root); | |
639 | } | |
640 | ||
641 | module_init(c4iw_init_module); | |
642 | module_exit(c4iw_exit_module); |