2 * Copyright (c) 2009-2010 Chelsio, Inc. All rights reserved.
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:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
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.
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
32 #include <linux/module.h>
33 #include <linux/moduleparam.h>
34 #include <linux/debugfs.h>
36 #include <rdma/ib_verbs.h>
40 #define DRV_VERSION "0.1"
42 MODULE_AUTHOR("Steve Wise");
43 MODULE_DESCRIPTION("Chelsio T4 RDMA Driver");
44 MODULE_LICENSE("Dual BSD/GPL");
45 MODULE_VERSION(DRV_VERSION);
47 static LIST_HEAD(uld_ctx_list);
48 static DEFINE_MUTEX(dev_mutex);
50 static struct dentry *c4iw_debugfs_root;
52 struct c4iw_debugfs_data {
53 struct c4iw_dev *devp;
59 static int count_idrs(int id, void *p, void *data)
63 *countp = *countp + 1;
67 static ssize_t debugfs_read(struct file *file, char __user *buf, size_t count,
70 struct c4iw_debugfs_data *d = file->private_data;
72 return simple_read_from_buffer(buf, count, ppos, d->buf, d->pos);
75 static int dump_qp(int id, void *p, void *data)
77 struct c4iw_qp *qp = p;
78 struct c4iw_debugfs_data *qpd = data;
82 if (id != qp->wq.sq.qid)
85 space = qpd->bufsize - qpd->pos - 1;
90 cc = snprintf(qpd->buf + qpd->pos, space,
91 "qp sq id %u rq id %u state %u onchip %u "
92 "ep tid %u state %u %pI4:%u->%pI4:%u\n",
93 qp->wq.sq.qid, qp->wq.rq.qid, (int)qp->attr.state,
94 qp->wq.sq.flags & T4_SQ_ONCHIP,
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));
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,
105 qp->wq.sq.flags & T4_SQ_ONCHIP);
111 static int qp_release(struct inode *inode, struct file *file)
113 struct c4iw_debugfs_data *qpd = file->private_data;
115 printk(KERN_INFO "%s null qpd?\n", __func__);
123 static int qp_open(struct inode *inode, struct file *file)
125 struct c4iw_debugfs_data *qpd;
129 qpd = kmalloc(sizeof *qpd, GFP_KERNEL);
134 qpd->devp = inode->i_private;
137 spin_lock_irq(&qpd->devp->lock);
138 idr_for_each(&qpd->devp->qpidr, count_idrs, &count);
139 spin_unlock_irq(&qpd->devp->lock);
141 qpd->bufsize = count * 128;
142 qpd->buf = kmalloc(qpd->bufsize, GFP_KERNEL);
148 spin_lock_irq(&qpd->devp->lock);
149 idr_for_each(&qpd->devp->qpidr, dump_qp, qpd);
150 spin_unlock_irq(&qpd->devp->lock);
152 qpd->buf[qpd->pos++] = 0;
153 file->private_data = qpd;
161 static const struct file_operations qp_debugfs_fops = {
162 .owner = THIS_MODULE,
164 .release = qp_release,
165 .read = debugfs_read,
166 .llseek = default_llseek,
169 static int dump_stag(int id, void *p, void *data)
171 struct c4iw_debugfs_data *stagd = data;
175 space = stagd->bufsize - stagd->pos - 1;
179 cc = snprintf(stagd->buf + stagd->pos, space, "0x%x\n", id<<8);
185 static int stag_release(struct inode *inode, struct file *file)
187 struct c4iw_debugfs_data *stagd = file->private_data;
189 printk(KERN_INFO "%s null stagd?\n", __func__);
197 static int stag_open(struct inode *inode, struct file *file)
199 struct c4iw_debugfs_data *stagd;
203 stagd = kmalloc(sizeof *stagd, GFP_KERNEL);
208 stagd->devp = inode->i_private;
211 spin_lock_irq(&stagd->devp->lock);
212 idr_for_each(&stagd->devp->mmidr, count_idrs, &count);
213 spin_unlock_irq(&stagd->devp->lock);
215 stagd->bufsize = count * sizeof("0x12345678\n");
216 stagd->buf = kmalloc(stagd->bufsize, GFP_KERNEL);
222 spin_lock_irq(&stagd->devp->lock);
223 idr_for_each(&stagd->devp->mmidr, dump_stag, stagd);
224 spin_unlock_irq(&stagd->devp->lock);
226 stagd->buf[stagd->pos++] = 0;
227 file->private_data = stagd;
235 static const struct file_operations stag_debugfs_fops = {
236 .owner = THIS_MODULE,
238 .release = stag_release,
239 .read = debugfs_read,
240 .llseek = default_llseek,
243 static int setup_debugfs(struct c4iw_dev *devp)
247 if (!devp->debugfs_root)
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;
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;
262 void c4iw_release_dev_ucontext(struct c4iw_rdev *rdev,
263 struct c4iw_dev_ucontext *uctx)
265 struct list_head *pos, *nxt;
266 struct c4iw_qid_list *entry;
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);
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);
283 mutex_unlock(&uctx->lock);
286 void c4iw_init_dev_ucontext(struct c4iw_rdev *rdev,
287 struct c4iw_dev_ucontext *uctx)
289 INIT_LIST_HEAD(&uctx->qpids);
290 INIT_LIST_HEAD(&uctx->cqids);
291 mutex_init(&uctx->lock);
294 /* Caller takes care of locking if needed */
295 static int c4iw_rdev_open(struct c4iw_rdev *rdev)
299 c4iw_init_dev_ucontext(rdev, &rdev->uctx);
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.
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 "
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",
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,
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);
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),
327 rdev->qpshift, rdev->qpmask,
328 rdev->cqshift, rdev->cqmask);
330 if (c4iw_num_stags(rdev) == 0) {
335 err = c4iw_init_resource(rdev, c4iw_num_stags(rdev), T4_MAX_NUM_PD);
337 printk(KERN_ERR MOD "error %d initializing resources\n", err);
340 err = c4iw_pblpool_create(rdev);
342 printk(KERN_ERR MOD "error %d initializing pbl pool\n", err);
345 err = c4iw_rqtpool_create(rdev);
347 printk(KERN_ERR MOD "error %d initializing rqt pool\n", err);
350 err = c4iw_ocqp_pool_create(rdev);
352 printk(KERN_ERR MOD "error %d initializing ocqp pool\n", err);
357 c4iw_rqtpool_destroy(rdev);
359 c4iw_pblpool_destroy(rdev);
361 c4iw_destroy_resource(&rdev->resource);
366 static void c4iw_rdev_close(struct c4iw_rdev *rdev)
368 c4iw_pblpool_destroy(rdev);
369 c4iw_rqtpool_destroy(rdev);
370 c4iw_destroy_resource(&rdev->resource);
374 struct list_head entry;
375 struct cxgb4_lld_info lldi;
376 struct c4iw_dev *dev;
379 static void c4iw_dealloc(struct uld_ctx *ctx)
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);
390 static void c4iw_remove(struct uld_ctx *ctx)
392 PDBG("%s c4iw_dev %p\n", __func__, ctx->dev);
393 c4iw_unregister_device(ctx->dev);
397 static int rdma_supported(const struct cxgb4_lld_info *infop)
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;
404 static struct c4iw_dev *c4iw_alloc(const struct cxgb4_lld_info *infop)
406 struct c4iw_dev *devp;
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);
414 devp = (struct c4iw_dev *)ib_alloc_device(sizeof(*devp));
416 printk(KERN_ERR MOD "Cannot allocate ib device\n");
417 return ERR_PTR(-ENOMEM);
419 devp->rdev.lldi = *infop;
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);
427 PDBG(KERN_INFO MOD "ocq memory: "
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);
432 ret = c4iw_rdev_open(&devp->rdev);
434 printk(KERN_ERR MOD "Unable to open CXIO rdev err %d\n", ret);
435 ib_dealloc_device(&devp->ibdev);
439 idr_init(&devp->cqidr);
440 idr_init(&devp->qpidr);
441 idr_init(&devp->mmidr);
442 spin_lock_init(&devp->lock);
444 if (c4iw_debugfs_root) {
445 devp->debugfs_root = debugfs_create_dir(
446 pci_name(devp->rdev.lldi.pdev),
453 static void *c4iw_uld_add(const struct cxgb4_lld_info *infop)
456 static int vers_printed;
460 printk(KERN_INFO MOD "Chelsio T4 RDMA Driver - version %s\n",
463 ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
465 ctx = ERR_PTR(-ENOMEM);
470 PDBG("%s found device %s nchan %u nrxq %u ntxq %u nports %u\n",
471 __func__, pci_name(ctx->lldi.pdev),
472 ctx->lldi.nchan, ctx->lldi.nrxq,
473 ctx->lldi.ntxq, ctx->lldi.nports);
475 mutex_lock(&dev_mutex);
476 list_add_tail(&ctx->entry, &uld_ctx_list);
477 mutex_unlock(&dev_mutex);
479 for (i = 0; i < ctx->lldi.nrxq; i++)
480 PDBG("rxqid[%u] %u\n", i, ctx->lldi.rxq_ids[i]);
485 static int c4iw_uld_rx_handler(void *handle, const __be64 *rsp,
486 const struct pkt_gl *gl)
488 struct uld_ctx *ctx = handle;
489 struct c4iw_dev *dev = ctx->dev;
491 const struct cpl_act_establish *rpl;
495 /* omit RSS and rsp_ctrl at end of descriptor */
496 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;
498 skb = alloc_skb(256, GFP_ATOMIC);
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;
506 u32 qid = be32_to_cpu(rc->pldbuflen_qid);
507 c4iw_ev_handler(dev, qid);
510 skb = cxgb4_pktgl_to_skb(gl, 128, 128);
516 opcode = rpl->ot.opcode;
518 if (c4iw_handlers[opcode])
519 c4iw_handlers[opcode](dev, skb);
521 printk(KERN_INFO "%s no handler opcode 0x%x...\n", __func__,
529 static int c4iw_uld_state_change(void *handle, enum cxgb4_state new_state)
531 struct uld_ctx *ctx = handle;
533 PDBG("%s new_state %u\n", __func__, new_state);
536 printk(KERN_INFO MOD "%s: Up\n", pci_name(ctx->lldi.pdev));
540 ctx->dev = c4iw_alloc(&ctx->lldi);
541 if (IS_ERR(ctx->dev)) {
543 "%s: initialization failed: %ld\n",
544 pci_name(ctx->lldi.pdev),
549 ret = c4iw_register_device(ctx->dev);
552 "%s: RDMA registration failed: %d\n",
553 pci_name(ctx->lldi.pdev), ret);
558 case CXGB4_STATE_DOWN:
559 printk(KERN_INFO MOD "%s: Down\n",
560 pci_name(ctx->lldi.pdev));
564 case CXGB4_STATE_START_RECOVERY:
565 printk(KERN_INFO MOD "%s: Fatal Error\n",
566 pci_name(ctx->lldi.pdev));
568 struct ib_event event;
570 ctx->dev->rdev.flags |= T4_FATAL_ERROR;
571 memset(&event, 0, sizeof event);
572 event.event = IB_EVENT_DEVICE_FATAL;
573 event.device = &ctx->dev->ibdev;
574 ib_dispatch_event(&event);
578 case CXGB4_STATE_DETACH:
579 printk(KERN_INFO MOD "%s: Detach\n",
580 pci_name(ctx->lldi.pdev));
588 static struct cxgb4_uld_info c4iw_uld_info = {
591 .rx_handler = c4iw_uld_rx_handler,
592 .state_change = c4iw_uld_state_change,
595 static int __init c4iw_init_module(void)
599 err = c4iw_cm_init();
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");
608 cxgb4_register_uld(CXGB4_ULD_RDMA, &c4iw_uld_info);
613 static void __exit c4iw_exit_module(void)
615 struct uld_ctx *ctx, *tmp;
617 mutex_lock(&dev_mutex);
618 list_for_each_entry_safe(ctx, tmp, &uld_ctx_list, entry) {
623 mutex_unlock(&dev_mutex);
624 cxgb4_unregister_uld(CXGB4_ULD_RDMA);
626 debugfs_remove_recursive(c4iw_debugfs_root);
629 module_init(c4iw_init_module);
630 module_exit(c4iw_exit_module);