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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 | ||
2f25e9a5 | 47 | static LIST_HEAD(uld_ctx_list); |
cfdda9d7 SW |
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; | |
9e8d1fa3 | 71 | |
3160977a | 72 | return simple_read_from_buffer(buf, count, ppos, d->buf, d->pos); |
9e8d1fa3 SW |
73 | } |
74 | ||
75 | static int dump_qp(int id, void *p, void *data) | |
cfdda9d7 SW |
76 | { |
77 | struct c4iw_qp *qp = p; | |
9e8d1fa3 | 78 | struct c4iw_debugfs_data *qpd = data; |
cfdda9d7 SW |
79 | int space; |
80 | int cc; | |
81 | ||
82 | if (id != qp->wq.sq.qid) | |
83 | return 0; | |
84 | ||
85 | space = qpd->bufsize - qpd->pos - 1; | |
86 | if (space == 0) | |
87 | return 1; | |
88 | ||
89 | if (qp->ep) | |
db5d040d SW |
90 | cc = snprintf(qpd->buf + qpd->pos, space, |
91 | "qp sq id %u rq id %u state %u onchip %u " | |
cfdda9d7 | 92 | "ep tid %u state %u %pI4:%u->%pI4:%u\n", |
db5d040d SW |
93 | qp->wq.sq.qid, qp->wq.rq.qid, (int)qp->attr.state, |
94 | qp->wq.sq.flags & T4_SQ_ONCHIP, | |
cfdda9d7 SW |
95 | qp->ep->hwtid, (int)qp->ep->com.state, |
96 | &qp->ep->com.local_addr.sin_addr.s_addr, | |
97 | ntohs(qp->ep->com.local_addr.sin_port), | |
98 | &qp->ep->com.remote_addr.sin_addr.s_addr, | |
99 | ntohs(qp->ep->com.remote_addr.sin_port)); | |
100 | else | |
db5d040d SW |
101 | cc = snprintf(qpd->buf + qpd->pos, space, |
102 | "qp sq id %u rq id %u state %u onchip %u\n", | |
103 | qp->wq.sq.qid, qp->wq.rq.qid, | |
104 | (int)qp->attr.state, | |
105 | qp->wq.sq.flags & T4_SQ_ONCHIP); | |
cfdda9d7 SW |
106 | if (cc < space) |
107 | qpd->pos += cc; | |
108 | return 0; | |
109 | } | |
110 | ||
111 | static int qp_release(struct inode *inode, struct file *file) | |
112 | { | |
9e8d1fa3 | 113 | struct c4iw_debugfs_data *qpd = file->private_data; |
cfdda9d7 SW |
114 | if (!qpd) { |
115 | printk(KERN_INFO "%s null qpd?\n", __func__); | |
116 | return 0; | |
117 | } | |
118 | kfree(qpd->buf); | |
119 | kfree(qpd); | |
120 | return 0; | |
121 | } | |
122 | ||
123 | static int qp_open(struct inode *inode, struct file *file) | |
124 | { | |
9e8d1fa3 | 125 | struct c4iw_debugfs_data *qpd; |
cfdda9d7 SW |
126 | int ret = 0; |
127 | int count = 1; | |
128 | ||
129 | qpd = kmalloc(sizeof *qpd, GFP_KERNEL); | |
130 | if (!qpd) { | |
131 | ret = -ENOMEM; | |
132 | goto out; | |
133 | } | |
134 | qpd->devp = inode->i_private; | |
135 | qpd->pos = 0; | |
136 | ||
137 | spin_lock_irq(&qpd->devp->lock); | |
9e8d1fa3 | 138 | idr_for_each(&qpd->devp->qpidr, count_idrs, &count); |
cfdda9d7 SW |
139 | spin_unlock_irq(&qpd->devp->lock); |
140 | ||
141 | qpd->bufsize = count * 128; | |
142 | qpd->buf = kmalloc(qpd->bufsize, GFP_KERNEL); | |
143 | if (!qpd->buf) { | |
144 | ret = -ENOMEM; | |
145 | goto err1; | |
146 | } | |
147 | ||
148 | spin_lock_irq(&qpd->devp->lock); | |
9e8d1fa3 | 149 | idr_for_each(&qpd->devp->qpidr, dump_qp, qpd); |
cfdda9d7 SW |
150 | spin_unlock_irq(&qpd->devp->lock); |
151 | ||
152 | qpd->buf[qpd->pos++] = 0; | |
153 | file->private_data = qpd; | |
154 | goto out; | |
155 | err1: | |
156 | kfree(qpd); | |
157 | out: | |
158 | return ret; | |
159 | } | |
160 | ||
9e8d1fa3 SW |
161 | static const struct file_operations qp_debugfs_fops = { |
162 | .owner = THIS_MODULE, | |
163 | .open = qp_open, | |
164 | .release = qp_release, | |
165 | .read = debugfs_read, | |
8bbac892 | 166 | .llseek = default_llseek, |
9e8d1fa3 SW |
167 | }; |
168 | ||
169 | static int dump_stag(int id, void *p, void *data) | |
cfdda9d7 | 170 | { |
9e8d1fa3 SW |
171 | struct c4iw_debugfs_data *stagd = data; |
172 | int space; | |
173 | int cc; | |
cfdda9d7 | 174 | |
9e8d1fa3 SW |
175 | space = stagd->bufsize - stagd->pos - 1; |
176 | if (space == 0) | |
177 | return 1; | |
178 | ||
179 | cc = snprintf(stagd->buf + stagd->pos, space, "0x%x\n", id<<8); | |
180 | if (cc < space) | |
181 | stagd->pos += cc; | |
182 | return 0; | |
183 | } | |
184 | ||
185 | static int stag_release(struct inode *inode, struct file *file) | |
186 | { | |
187 | struct c4iw_debugfs_data *stagd = file->private_data; | |
188 | if (!stagd) { | |
189 | printk(KERN_INFO "%s null stagd?\n", __func__); | |
cfdda9d7 | 190 | return 0; |
9e8d1fa3 SW |
191 | } |
192 | kfree(stagd->buf); | |
193 | kfree(stagd); | |
194 | return 0; | |
195 | } | |
cfdda9d7 | 196 | |
9e8d1fa3 SW |
197 | static int stag_open(struct inode *inode, struct file *file) |
198 | { | |
199 | struct c4iw_debugfs_data *stagd; | |
200 | int ret = 0; | |
201 | int count = 1; | |
cfdda9d7 | 202 | |
9e8d1fa3 SW |
203 | stagd = kmalloc(sizeof *stagd, GFP_KERNEL); |
204 | if (!stagd) { | |
205 | ret = -ENOMEM; | |
206 | goto out; | |
207 | } | |
208 | stagd->devp = inode->i_private; | |
209 | stagd->pos = 0; | |
cfdda9d7 | 210 | |
9e8d1fa3 SW |
211 | spin_lock_irq(&stagd->devp->lock); |
212 | idr_for_each(&stagd->devp->mmidr, count_idrs, &count); | |
213 | spin_unlock_irq(&stagd->devp->lock); | |
214 | ||
215 | stagd->bufsize = count * sizeof("0x12345678\n"); | |
216 | stagd->buf = kmalloc(stagd->bufsize, GFP_KERNEL); | |
217 | if (!stagd->buf) { | |
218 | ret = -ENOMEM; | |
219 | goto err1; | |
cfdda9d7 | 220 | } |
9e8d1fa3 SW |
221 | |
222 | spin_lock_irq(&stagd->devp->lock); | |
223 | idr_for_each(&stagd->devp->mmidr, dump_stag, stagd); | |
224 | spin_unlock_irq(&stagd->devp->lock); | |
225 | ||
226 | stagd->buf[stagd->pos++] = 0; | |
227 | file->private_data = stagd; | |
228 | goto out; | |
229 | err1: | |
230 | kfree(stagd); | |
231 | out: | |
232 | return ret; | |
cfdda9d7 SW |
233 | } |
234 | ||
9e8d1fa3 | 235 | static const struct file_operations stag_debugfs_fops = { |
cfdda9d7 | 236 | .owner = THIS_MODULE, |
9e8d1fa3 SW |
237 | .open = stag_open, |
238 | .release = stag_release, | |
239 | .read = debugfs_read, | |
8bbac892 | 240 | .llseek = default_llseek, |
cfdda9d7 SW |
241 | }; |
242 | ||
243 | static int setup_debugfs(struct c4iw_dev *devp) | |
244 | { | |
245 | struct dentry *de; | |
246 | ||
247 | if (!devp->debugfs_root) | |
248 | return -1; | |
249 | ||
250 | de = debugfs_create_file("qps", S_IWUSR, devp->debugfs_root, | |
251 | (void *)devp, &qp_debugfs_fops); | |
252 | if (de && de->d_inode) | |
253 | de->d_inode->i_size = 4096; | |
9e8d1fa3 SW |
254 | |
255 | de = debugfs_create_file("stags", S_IWUSR, devp->debugfs_root, | |
256 | (void *)devp, &stag_debugfs_fops); | |
257 | if (de && de->d_inode) | |
258 | de->d_inode->i_size = 4096; | |
cfdda9d7 SW |
259 | return 0; |
260 | } | |
261 | ||
262 | void c4iw_release_dev_ucontext(struct c4iw_rdev *rdev, | |
263 | struct c4iw_dev_ucontext *uctx) | |
264 | { | |
265 | struct list_head *pos, *nxt; | |
266 | struct c4iw_qid_list *entry; | |
267 | ||
268 | mutex_lock(&uctx->lock); | |
269 | list_for_each_safe(pos, nxt, &uctx->qpids) { | |
270 | entry = list_entry(pos, struct c4iw_qid_list, entry); | |
271 | list_del_init(&entry->entry); | |
272 | if (!(entry->qid & rdev->qpmask)) | |
273 | c4iw_put_resource(&rdev->resource.qid_fifo, entry->qid, | |
274 | &rdev->resource.qid_fifo_lock); | |
275 | kfree(entry); | |
276 | } | |
277 | ||
278 | list_for_each_safe(pos, nxt, &uctx->qpids) { | |
279 | entry = list_entry(pos, struct c4iw_qid_list, entry); | |
280 | list_del_init(&entry->entry); | |
281 | kfree(entry); | |
282 | } | |
283 | mutex_unlock(&uctx->lock); | |
284 | } | |
285 | ||
286 | void c4iw_init_dev_ucontext(struct c4iw_rdev *rdev, | |
287 | struct c4iw_dev_ucontext *uctx) | |
288 | { | |
289 | INIT_LIST_HEAD(&uctx->qpids); | |
290 | INIT_LIST_HEAD(&uctx->cqids); | |
291 | mutex_init(&uctx->lock); | |
292 | } | |
293 | ||
294 | /* Caller takes care of locking if needed */ | |
295 | static int c4iw_rdev_open(struct c4iw_rdev *rdev) | |
296 | { | |
297 | int err; | |
298 | ||
299 | c4iw_init_dev_ucontext(rdev, &rdev->uctx); | |
300 | ||
301 | /* | |
302 | * qpshift is the number of bits to shift the qpid left in order | |
303 | * to get the correct address of the doorbell for that qp. | |
304 | */ | |
305 | rdev->qpshift = PAGE_SHIFT - ilog2(rdev->lldi.udb_density); | |
306 | rdev->qpmask = rdev->lldi.udb_density - 1; | |
307 | rdev->cqshift = PAGE_SHIFT - ilog2(rdev->lldi.ucq_density); | |
308 | rdev->cqmask = rdev->lldi.ucq_density - 1; | |
309 | PDBG("%s dev %s stag start 0x%0x size 0x%0x num stags %d " | |
93fb72e4 SW |
310 | "pbl start 0x%0x size 0x%0x rq start 0x%0x size 0x%0x " |
311 | "qp qid start %u size %u cq qid start %u size %u\n", | |
cfdda9d7 SW |
312 | __func__, pci_name(rdev->lldi.pdev), rdev->lldi.vr->stag.start, |
313 | rdev->lldi.vr->stag.size, c4iw_num_stags(rdev), | |
314 | rdev->lldi.vr->pbl.start, | |
315 | rdev->lldi.vr->pbl.size, rdev->lldi.vr->rq.start, | |
93fb72e4 SW |
316 | rdev->lldi.vr->rq.size, |
317 | rdev->lldi.vr->qp.start, | |
318 | rdev->lldi.vr->qp.size, | |
319 | rdev->lldi.vr->cq.start, | |
320 | rdev->lldi.vr->cq.size); | |
cfdda9d7 SW |
321 | PDBG("udb len 0x%x udb base %p db_reg %p gts_reg %p qpshift %lu " |
322 | "qpmask 0x%x cqshift %lu cqmask 0x%x\n", | |
323 | (unsigned)pci_resource_len(rdev->lldi.pdev, 2), | |
324 | (void *)pci_resource_start(rdev->lldi.pdev, 2), | |
325 | rdev->lldi.db_reg, | |
326 | rdev->lldi.gts_reg, | |
327 | rdev->qpshift, rdev->qpmask, | |
328 | rdev->cqshift, rdev->cqmask); | |
329 | ||
330 | if (c4iw_num_stags(rdev) == 0) { | |
331 | err = -EINVAL; | |
332 | goto err1; | |
333 | } | |
334 | ||
335 | err = c4iw_init_resource(rdev, c4iw_num_stags(rdev), T4_MAX_NUM_PD); | |
336 | if (err) { | |
337 | printk(KERN_ERR MOD "error %d initializing resources\n", err); | |
338 | goto err1; | |
339 | } | |
340 | err = c4iw_pblpool_create(rdev); | |
341 | if (err) { | |
342 | printk(KERN_ERR MOD "error %d initializing pbl pool\n", err); | |
343 | goto err2; | |
344 | } | |
345 | err = c4iw_rqtpool_create(rdev); | |
346 | if (err) { | |
347 | printk(KERN_ERR MOD "error %d initializing rqt pool\n", err); | |
348 | goto err3; | |
349 | } | |
c6d7b267 SW |
350 | err = c4iw_ocqp_pool_create(rdev); |
351 | if (err) { | |
352 | printk(KERN_ERR MOD "error %d initializing ocqp pool\n", err); | |
353 | goto err4; | |
354 | } | |
cfdda9d7 | 355 | return 0; |
c6d7b267 SW |
356 | err4: |
357 | c4iw_rqtpool_destroy(rdev); | |
cfdda9d7 SW |
358 | err3: |
359 | c4iw_pblpool_destroy(rdev); | |
360 | err2: | |
361 | c4iw_destroy_resource(&rdev->resource); | |
362 | err1: | |
363 | return err; | |
364 | } | |
365 | ||
366 | static void c4iw_rdev_close(struct c4iw_rdev *rdev) | |
367 | { | |
368 | c4iw_pblpool_destroy(rdev); | |
369 | c4iw_rqtpool_destroy(rdev); | |
370 | c4iw_destroy_resource(&rdev->resource); | |
371 | } | |
372 | ||
2f25e9a5 SW |
373 | struct uld_ctx { |
374 | struct list_head entry; | |
375 | struct cxgb4_lld_info lldi; | |
376 | struct c4iw_dev *dev; | |
377 | }; | |
378 | ||
9efe10a1 | 379 | static void c4iw_dealloc(struct uld_ctx *ctx) |
cfdda9d7 | 380 | { |
2f25e9a5 SW |
381 | c4iw_rdev_close(&ctx->dev->rdev); |
382 | idr_destroy(&ctx->dev->cqidr); | |
383 | idr_destroy(&ctx->dev->qpidr); | |
384 | idr_destroy(&ctx->dev->mmidr); | |
385 | iounmap(ctx->dev->rdev.oc_mw_kva); | |
386 | ib_dealloc_device(&ctx->dev->ibdev); | |
387 | ctx->dev = NULL; | |
cfdda9d7 SW |
388 | } |
389 | ||
9efe10a1 SW |
390 | static void c4iw_remove(struct uld_ctx *ctx) |
391 | { | |
392 | PDBG("%s c4iw_dev %p\n", __func__, ctx->dev); | |
393 | c4iw_unregister_device(ctx->dev); | |
394 | c4iw_dealloc(ctx); | |
395 | } | |
396 | ||
397 | static int rdma_supported(const struct cxgb4_lld_info *infop) | |
398 | { | |
399 | return infop->vr->stag.size > 0 && infop->vr->pbl.size > 0 && | |
400 | infop->vr->rq.size > 0 && infop->vr->qp.size > 0 && | |
401 | infop->vr->cq.size > 0 && infop->vr->ocq.size > 0; | |
402 | } | |
403 | ||
cfdda9d7 SW |
404 | static struct c4iw_dev *c4iw_alloc(const struct cxgb4_lld_info *infop) |
405 | { | |
406 | struct c4iw_dev *devp; | |
407 | int ret; | |
408 | ||
9efe10a1 SW |
409 | if (!rdma_supported(infop)) { |
410 | printk(KERN_INFO MOD "%s: RDMA not supported on this device.\n", | |
411 | pci_name(infop->pdev)); | |
412 | return ERR_PTR(-ENOSYS); | |
413 | } | |
cfdda9d7 SW |
414 | devp = (struct c4iw_dev *)ib_alloc_device(sizeof(*devp)); |
415 | if (!devp) { | |
416 | printk(KERN_ERR MOD "Cannot allocate ib device\n"); | |
bbe9a0a2 | 417 | return ERR_PTR(-ENOMEM); |
cfdda9d7 SW |
418 | } |
419 | devp->rdev.lldi = *infop; | |
420 | ||
c6d7b267 SW |
421 | devp->rdev.oc_mw_pa = pci_resource_start(devp->rdev.lldi.pdev, 2) + |
422 | (pci_resource_len(devp->rdev.lldi.pdev, 2) - | |
423 | roundup_pow_of_two(devp->rdev.lldi.vr->ocq.size)); | |
424 | devp->rdev.oc_mw_kva = ioremap_wc(devp->rdev.oc_mw_pa, | |
425 | devp->rdev.lldi.vr->ocq.size); | |
426 | ||
2f25e9a5 | 427 | PDBG(KERN_INFO MOD "ocq memory: " |
c6d7b267 SW |
428 | "hw_start 0x%x size %u mw_pa 0x%lx mw_kva %p\n", |
429 | devp->rdev.lldi.vr->ocq.start, devp->rdev.lldi.vr->ocq.size, | |
430 | devp->rdev.oc_mw_pa, devp->rdev.oc_mw_kva); | |
431 | ||
cfdda9d7 SW |
432 | ret = c4iw_rdev_open(&devp->rdev); |
433 | if (ret) { | |
cfdda9d7 SW |
434 | printk(KERN_ERR MOD "Unable to open CXIO rdev err %d\n", ret); |
435 | ib_dealloc_device(&devp->ibdev); | |
bbe9a0a2 | 436 | return ERR_PTR(ret); |
cfdda9d7 SW |
437 | } |
438 | ||
439 | idr_init(&devp->cqidr); | |
440 | idr_init(&devp->qpidr); | |
441 | idr_init(&devp->mmidr); | |
442 | spin_lock_init(&devp->lock); | |
cfdda9d7 | 443 | |
cfdda9d7 SW |
444 | if (c4iw_debugfs_root) { |
445 | devp->debugfs_root = debugfs_create_dir( | |
446 | pci_name(devp->rdev.lldi.pdev), | |
447 | c4iw_debugfs_root); | |
448 | setup_debugfs(devp); | |
449 | } | |
450 | return devp; | |
451 | } | |
452 | ||
453 | static void *c4iw_uld_add(const struct cxgb4_lld_info *infop) | |
454 | { | |
2f25e9a5 | 455 | struct uld_ctx *ctx; |
cfdda9d7 SW |
456 | static int vers_printed; |
457 | int i; | |
458 | ||
459 | if (!vers_printed++) | |
460 | printk(KERN_INFO MOD "Chelsio T4 RDMA Driver - version %s\n", | |
461 | DRV_VERSION); | |
462 | ||
2f25e9a5 SW |
463 | ctx = kzalloc(sizeof *ctx, GFP_KERNEL); |
464 | if (!ctx) { | |
465 | ctx = ERR_PTR(-ENOMEM); | |
cfdda9d7 | 466 | goto out; |
2f25e9a5 SW |
467 | } |
468 | ctx->lldi = *infop; | |
cfdda9d7 SW |
469 | |
470 | PDBG("%s found device %s nchan %u nrxq %u ntxq %u nports %u\n", | |
2f25e9a5 SW |
471 | __func__, pci_name(ctx->lldi.pdev), |
472 | ctx->lldi.nchan, ctx->lldi.nrxq, | |
473 | ctx->lldi.ntxq, ctx->lldi.nports); | |
474 | ||
475 | mutex_lock(&dev_mutex); | |
476 | list_add_tail(&ctx->entry, &uld_ctx_list); | |
477 | mutex_unlock(&dev_mutex); | |
cfdda9d7 | 478 | |
2f25e9a5 SW |
479 | for (i = 0; i < ctx->lldi.nrxq; i++) |
480 | PDBG("rxqid[%u] %u\n", i, ctx->lldi.rxq_ids[i]); | |
cfdda9d7 | 481 | out: |
2f25e9a5 | 482 | return ctx; |
cfdda9d7 SW |
483 | } |
484 | ||
cfdda9d7 SW |
485 | static int c4iw_uld_rx_handler(void *handle, const __be64 *rsp, |
486 | const struct pkt_gl *gl) | |
487 | { | |
2f25e9a5 SW |
488 | struct uld_ctx *ctx = handle; |
489 | struct c4iw_dev *dev = ctx->dev; | |
cfdda9d7 SW |
490 | struct sk_buff *skb; |
491 | const struct cpl_act_establish *rpl; | |
492 | unsigned int opcode; | |
493 | ||
494 | if (gl == NULL) { | |
495 | /* omit RSS and rsp_ctrl at end of descriptor */ | |
496 | unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8; | |
497 | ||
498 | skb = alloc_skb(256, GFP_ATOMIC); | |
499 | if (!skb) | |
500 | goto nomem; | |
501 | __skb_put(skb, len); | |
502 | skb_copy_to_linear_data(skb, &rsp[1], len); | |
503 | } else if (gl == CXGB4_MSG_AN) { | |
504 | const struct rsp_ctrl *rc = (void *)rsp; | |
505 | ||
506 | u32 qid = be32_to_cpu(rc->pldbuflen_qid); | |
507 | c4iw_ev_handler(dev, qid); | |
508 | return 0; | |
509 | } else { | |
da411ba1 | 510 | skb = cxgb4_pktgl_to_skb(gl, 128, 128); |
cfdda9d7 SW |
511 | if (unlikely(!skb)) |
512 | goto nomem; | |
513 | } | |
514 | ||
515 | rpl = cplhdr(skb); | |
516 | opcode = rpl->ot.opcode; | |
517 | ||
518 | if (c4iw_handlers[opcode]) | |
519 | c4iw_handlers[opcode](dev, skb); | |
520 | else | |
521 | printk(KERN_INFO "%s no handler opcode 0x%x...\n", __func__, | |
522 | opcode); | |
523 | ||
524 | return 0; | |
525 | nomem: | |
526 | return -1; | |
527 | } | |
528 | ||
529 | static int c4iw_uld_state_change(void *handle, enum cxgb4_state new_state) | |
530 | { | |
2f25e9a5 | 531 | struct uld_ctx *ctx = handle; |
1c01c538 | 532 | |
cfdda9d7 | 533 | PDBG("%s new_state %u\n", __func__, new_state); |
1c01c538 SW |
534 | switch (new_state) { |
535 | case CXGB4_STATE_UP: | |
2f25e9a5 SW |
536 | printk(KERN_INFO MOD "%s: Up\n", pci_name(ctx->lldi.pdev)); |
537 | if (!ctx->dev) { | |
9efe10a1 | 538 | int ret; |
2f25e9a5 SW |
539 | |
540 | ctx->dev = c4iw_alloc(&ctx->lldi); | |
9efe10a1 SW |
541 | if (IS_ERR(ctx->dev)) { |
542 | printk(KERN_ERR MOD | |
543 | "%s: initialization failed: %ld\n", | |
544 | pci_name(ctx->lldi.pdev), | |
545 | PTR_ERR(ctx->dev)); | |
546 | ctx->dev = NULL; | |
547 | break; | |
548 | } | |
549 | ret = c4iw_register_device(ctx->dev); | |
550 | if (ret) { | |
1c01c538 SW |
551 | printk(KERN_ERR MOD |
552 | "%s: RDMA registration failed: %d\n", | |
2f25e9a5 | 553 | pci_name(ctx->lldi.pdev), ret); |
9efe10a1 SW |
554 | c4iw_dealloc(ctx); |
555 | } | |
1c01c538 SW |
556 | } |
557 | break; | |
558 | case CXGB4_STATE_DOWN: | |
559 | printk(KERN_INFO MOD "%s: Down\n", | |
2f25e9a5 SW |
560 | pci_name(ctx->lldi.pdev)); |
561 | if (ctx->dev) | |
562 | c4iw_remove(ctx); | |
1c01c538 SW |
563 | break; |
564 | case CXGB4_STATE_START_RECOVERY: | |
565 | printk(KERN_INFO MOD "%s: Fatal Error\n", | |
2f25e9a5 SW |
566 | pci_name(ctx->lldi.pdev)); |
567 | if (ctx->dev) { | |
767fbe81 SW |
568 | struct ib_event event; |
569 | ||
2f25e9a5 | 570 | ctx->dev->rdev.flags |= T4_FATAL_ERROR; |
767fbe81 SW |
571 | memset(&event, 0, sizeof event); |
572 | event.event = IB_EVENT_DEVICE_FATAL; | |
2f25e9a5 | 573 | event.device = &ctx->dev->ibdev; |
767fbe81 | 574 | ib_dispatch_event(&event); |
2f25e9a5 | 575 | c4iw_remove(ctx); |
767fbe81 | 576 | } |
1c01c538 SW |
577 | break; |
578 | case CXGB4_STATE_DETACH: | |
579 | printk(KERN_INFO MOD "%s: Detach\n", | |
2f25e9a5 SW |
580 | pci_name(ctx->lldi.pdev)); |
581 | if (ctx->dev) | |
582 | c4iw_remove(ctx); | |
1c01c538 SW |
583 | break; |
584 | } | |
cfdda9d7 SW |
585 | return 0; |
586 | } | |
587 | ||
588 | static struct cxgb4_uld_info c4iw_uld_info = { | |
589 | .name = DRV_NAME, | |
590 | .add = c4iw_uld_add, | |
591 | .rx_handler = c4iw_uld_rx_handler, | |
592 | .state_change = c4iw_uld_state_change, | |
593 | }; | |
594 | ||
595 | static int __init c4iw_init_module(void) | |
596 | { | |
597 | int err; | |
598 | ||
599 | err = c4iw_cm_init(); | |
600 | if (err) | |
601 | return err; | |
602 | ||
603 | c4iw_debugfs_root = debugfs_create_dir(DRV_NAME, NULL); | |
604 | if (!c4iw_debugfs_root) | |
605 | printk(KERN_WARNING MOD | |
606 | "could not create debugfs entry, continuing\n"); | |
607 | ||
608 | cxgb4_register_uld(CXGB4_ULD_RDMA, &c4iw_uld_info); | |
609 | ||
610 | return 0; | |
611 | } | |
612 | ||
613 | static void __exit c4iw_exit_module(void) | |
614 | { | |
2f25e9a5 | 615 | struct uld_ctx *ctx, *tmp; |
cfdda9d7 | 616 | |
cfdda9d7 | 617 | mutex_lock(&dev_mutex); |
2f25e9a5 SW |
618 | list_for_each_entry_safe(ctx, tmp, &uld_ctx_list, entry) { |
619 | if (ctx->dev) | |
620 | c4iw_remove(ctx); | |
621 | kfree(ctx); | |
cfdda9d7 SW |
622 | } |
623 | mutex_unlock(&dev_mutex); | |
fd388ce6 | 624 | cxgb4_unregister_uld(CXGB4_ULD_RDMA); |
cfdda9d7 SW |
625 | c4iw_cm_term(); |
626 | debugfs_remove_recursive(c4iw_debugfs_root); | |
627 | } | |
628 | ||
629 | module_init(c4iw_init_module); | |
630 | module_exit(c4iw_exit_module); |