93fb72e443
Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
550 lines
13 KiB
C
550 lines
13 KiB
C
/*
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* Copyright (c) 2009-2010 Chelsio, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/debugfs.h>
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#include <rdma/ib_verbs.h>
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#include "iw_cxgb4.h"
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#define DRV_VERSION "0.1"
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MODULE_AUTHOR("Steve Wise");
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MODULE_DESCRIPTION("Chelsio T4 RDMA Driver");
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MODULE_LICENSE("Dual BSD/GPL");
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MODULE_VERSION(DRV_VERSION);
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static LIST_HEAD(dev_list);
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static DEFINE_MUTEX(dev_mutex);
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static struct dentry *c4iw_debugfs_root;
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struct debugfs_qp_data {
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struct c4iw_dev *devp;
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char *buf;
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int bufsize;
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int pos;
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};
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static int count_qps(int id, void *p, void *data)
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{
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struct c4iw_qp *qp = p;
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int *countp = data;
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if (id != qp->wq.sq.qid)
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return 0;
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*countp = *countp + 1;
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return 0;
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}
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static int dump_qps(int id, void *p, void *data)
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{
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struct c4iw_qp *qp = p;
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struct debugfs_qp_data *qpd = data;
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int space;
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int cc;
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if (id != qp->wq.sq.qid)
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return 0;
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space = qpd->bufsize - qpd->pos - 1;
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if (space == 0)
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return 1;
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if (qp->ep)
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cc = snprintf(qpd->buf + qpd->pos, space, "qp id %u state %u "
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"ep tid %u state %u %pI4:%u->%pI4:%u\n",
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qp->wq.sq.qid, (int)qp->attr.state,
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qp->ep->hwtid, (int)qp->ep->com.state,
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&qp->ep->com.local_addr.sin_addr.s_addr,
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ntohs(qp->ep->com.local_addr.sin_port),
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&qp->ep->com.remote_addr.sin_addr.s_addr,
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ntohs(qp->ep->com.remote_addr.sin_port));
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else
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cc = snprintf(qpd->buf + qpd->pos, space, "qp id %u state %u\n",
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qp->wq.sq.qid, (int)qp->attr.state);
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if (cc < space)
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qpd->pos += cc;
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return 0;
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}
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static int qp_release(struct inode *inode, struct file *file)
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{
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struct debugfs_qp_data *qpd = file->private_data;
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if (!qpd) {
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printk(KERN_INFO "%s null qpd?\n", __func__);
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return 0;
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}
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kfree(qpd->buf);
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kfree(qpd);
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return 0;
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}
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static int qp_open(struct inode *inode, struct file *file)
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{
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struct debugfs_qp_data *qpd;
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int ret = 0;
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int count = 1;
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qpd = kmalloc(sizeof *qpd, GFP_KERNEL);
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if (!qpd) {
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ret = -ENOMEM;
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goto out;
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}
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qpd->devp = inode->i_private;
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qpd->pos = 0;
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spin_lock_irq(&qpd->devp->lock);
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idr_for_each(&qpd->devp->qpidr, count_qps, &count);
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spin_unlock_irq(&qpd->devp->lock);
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qpd->bufsize = count * 128;
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qpd->buf = kmalloc(qpd->bufsize, GFP_KERNEL);
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if (!qpd->buf) {
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ret = -ENOMEM;
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goto err1;
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}
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spin_lock_irq(&qpd->devp->lock);
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idr_for_each(&qpd->devp->qpidr, dump_qps, qpd);
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spin_unlock_irq(&qpd->devp->lock);
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qpd->buf[qpd->pos++] = 0;
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file->private_data = qpd;
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goto out;
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err1:
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kfree(qpd);
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out:
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return ret;
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}
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static ssize_t qp_read(struct file *file, char __user *buf, size_t count,
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loff_t *ppos)
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{
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struct debugfs_qp_data *qpd = file->private_data;
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loff_t pos = *ppos;
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loff_t avail = qpd->pos;
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if (pos < 0)
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return -EINVAL;
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if (pos >= avail)
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return 0;
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if (count > avail - pos)
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count = avail - pos;
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while (count) {
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size_t len = 0;
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len = min((int)count, (int)qpd->pos - (int)pos);
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if (copy_to_user(buf, qpd->buf + pos, len))
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return -EFAULT;
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if (len == 0)
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return -EINVAL;
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buf += len;
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pos += len;
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count -= len;
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}
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count = pos - *ppos;
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*ppos = pos;
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return count;
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}
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static const struct file_operations qp_debugfs_fops = {
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.owner = THIS_MODULE,
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.open = qp_open,
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.release = qp_release,
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.read = qp_read,
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};
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static int setup_debugfs(struct c4iw_dev *devp)
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{
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struct dentry *de;
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if (!devp->debugfs_root)
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return -1;
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de = debugfs_create_file("qps", S_IWUSR, devp->debugfs_root,
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(void *)devp, &qp_debugfs_fops);
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if (de && de->d_inode)
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de->d_inode->i_size = 4096;
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return 0;
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}
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void c4iw_release_dev_ucontext(struct c4iw_rdev *rdev,
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struct c4iw_dev_ucontext *uctx)
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{
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struct list_head *pos, *nxt;
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struct c4iw_qid_list *entry;
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mutex_lock(&uctx->lock);
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list_for_each_safe(pos, nxt, &uctx->qpids) {
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entry = list_entry(pos, struct c4iw_qid_list, entry);
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list_del_init(&entry->entry);
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if (!(entry->qid & rdev->qpmask))
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c4iw_put_resource(&rdev->resource.qid_fifo, entry->qid,
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&rdev->resource.qid_fifo_lock);
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kfree(entry);
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}
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list_for_each_safe(pos, nxt, &uctx->qpids) {
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entry = list_entry(pos, struct c4iw_qid_list, entry);
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list_del_init(&entry->entry);
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kfree(entry);
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}
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mutex_unlock(&uctx->lock);
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}
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void c4iw_init_dev_ucontext(struct c4iw_rdev *rdev,
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struct c4iw_dev_ucontext *uctx)
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{
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INIT_LIST_HEAD(&uctx->qpids);
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INIT_LIST_HEAD(&uctx->cqids);
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mutex_init(&uctx->lock);
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}
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/* Caller takes care of locking if needed */
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static int c4iw_rdev_open(struct c4iw_rdev *rdev)
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{
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int err;
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c4iw_init_dev_ucontext(rdev, &rdev->uctx);
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/*
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* qpshift is the number of bits to shift the qpid left in order
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* to get the correct address of the doorbell for that qp.
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*/
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rdev->qpshift = PAGE_SHIFT - ilog2(rdev->lldi.udb_density);
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rdev->qpmask = rdev->lldi.udb_density - 1;
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rdev->cqshift = PAGE_SHIFT - ilog2(rdev->lldi.ucq_density);
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rdev->cqmask = rdev->lldi.ucq_density - 1;
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PDBG("%s dev %s stag start 0x%0x size 0x%0x num stags %d "
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"pbl start 0x%0x size 0x%0x rq start 0x%0x size 0x%0x "
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"qp qid start %u size %u cq qid start %u size %u\n",
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__func__, pci_name(rdev->lldi.pdev), rdev->lldi.vr->stag.start,
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rdev->lldi.vr->stag.size, c4iw_num_stags(rdev),
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rdev->lldi.vr->pbl.start,
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rdev->lldi.vr->pbl.size, rdev->lldi.vr->rq.start,
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rdev->lldi.vr->rq.size,
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rdev->lldi.vr->qp.start,
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rdev->lldi.vr->qp.size,
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rdev->lldi.vr->cq.start,
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rdev->lldi.vr->cq.size);
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PDBG("udb len 0x%x udb base %p db_reg %p gts_reg %p qpshift %lu "
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"qpmask 0x%x cqshift %lu cqmask 0x%x\n",
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(unsigned)pci_resource_len(rdev->lldi.pdev, 2),
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(void *)pci_resource_start(rdev->lldi.pdev, 2),
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rdev->lldi.db_reg,
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rdev->lldi.gts_reg,
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rdev->qpshift, rdev->qpmask,
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rdev->cqshift, rdev->cqmask);
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if (c4iw_num_stags(rdev) == 0) {
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err = -EINVAL;
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goto err1;
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}
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err = c4iw_init_resource(rdev, c4iw_num_stags(rdev), T4_MAX_NUM_PD);
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if (err) {
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printk(KERN_ERR MOD "error %d initializing resources\n", err);
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goto err1;
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}
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err = c4iw_pblpool_create(rdev);
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if (err) {
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printk(KERN_ERR MOD "error %d initializing pbl pool\n", err);
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goto err2;
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}
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err = c4iw_rqtpool_create(rdev);
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if (err) {
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printk(KERN_ERR MOD "error %d initializing rqt pool\n", err);
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goto err3;
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}
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return 0;
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err3:
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c4iw_pblpool_destroy(rdev);
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err2:
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c4iw_destroy_resource(&rdev->resource);
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err1:
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return err;
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}
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static void c4iw_rdev_close(struct c4iw_rdev *rdev)
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{
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c4iw_pblpool_destroy(rdev);
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c4iw_rqtpool_destroy(rdev);
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c4iw_destroy_resource(&rdev->resource);
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}
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static void c4iw_remove(struct c4iw_dev *dev)
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{
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PDBG("%s c4iw_dev %p\n", __func__, dev);
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cancel_delayed_work_sync(&dev->db_drop_task);
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list_del(&dev->entry);
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if (dev->registered)
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c4iw_unregister_device(dev);
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c4iw_rdev_close(&dev->rdev);
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idr_destroy(&dev->cqidr);
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idr_destroy(&dev->qpidr);
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idr_destroy(&dev->mmidr);
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ib_dealloc_device(&dev->ibdev);
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}
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static struct c4iw_dev *c4iw_alloc(const struct cxgb4_lld_info *infop)
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{
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struct c4iw_dev *devp;
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int ret;
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devp = (struct c4iw_dev *)ib_alloc_device(sizeof(*devp));
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if (!devp) {
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printk(KERN_ERR MOD "Cannot allocate ib device\n");
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return NULL;
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}
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devp->rdev.lldi = *infop;
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mutex_lock(&dev_mutex);
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ret = c4iw_rdev_open(&devp->rdev);
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if (ret) {
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mutex_unlock(&dev_mutex);
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printk(KERN_ERR MOD "Unable to open CXIO rdev err %d\n", ret);
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ib_dealloc_device(&devp->ibdev);
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return NULL;
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}
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idr_init(&devp->cqidr);
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idr_init(&devp->qpidr);
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idr_init(&devp->mmidr);
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spin_lock_init(&devp->lock);
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list_add_tail(&devp->entry, &dev_list);
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mutex_unlock(&dev_mutex);
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if (c4iw_debugfs_root) {
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devp->debugfs_root = debugfs_create_dir(
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pci_name(devp->rdev.lldi.pdev),
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c4iw_debugfs_root);
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setup_debugfs(devp);
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}
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return devp;
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}
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static void *c4iw_uld_add(const struct cxgb4_lld_info *infop)
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{
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struct c4iw_dev *dev;
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static int vers_printed;
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int i;
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if (!vers_printed++)
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printk(KERN_INFO MOD "Chelsio T4 RDMA Driver - version %s\n",
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DRV_VERSION);
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dev = c4iw_alloc(infop);
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if (!dev)
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goto out;
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PDBG("%s found device %s nchan %u nrxq %u ntxq %u nports %u\n",
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__func__, pci_name(dev->rdev.lldi.pdev),
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dev->rdev.lldi.nchan, dev->rdev.lldi.nrxq,
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dev->rdev.lldi.ntxq, dev->rdev.lldi.nports);
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for (i = 0; i < dev->rdev.lldi.nrxq; i++)
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PDBG("rxqid[%u] %u\n", i, dev->rdev.lldi.rxq_ids[i]);
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out:
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return dev;
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}
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static struct sk_buff *t4_pktgl_to_skb(const struct pkt_gl *gl,
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unsigned int skb_len,
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unsigned int pull_len)
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{
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struct sk_buff *skb;
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struct skb_shared_info *ssi;
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if (gl->tot_len <= 512) {
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skb = alloc_skb(gl->tot_len, GFP_ATOMIC);
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if (unlikely(!skb))
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goto out;
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__skb_put(skb, gl->tot_len);
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skb_copy_to_linear_data(skb, gl->va, gl->tot_len);
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} else {
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skb = alloc_skb(skb_len, GFP_ATOMIC);
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if (unlikely(!skb))
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goto out;
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__skb_put(skb, pull_len);
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skb_copy_to_linear_data(skb, gl->va, pull_len);
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ssi = skb_shinfo(skb);
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ssi->frags[0].page = gl->frags[0].page;
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ssi->frags[0].page_offset = gl->frags[0].page_offset + pull_len;
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ssi->frags[0].size = gl->frags[0].size - pull_len;
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if (gl->nfrags > 1)
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memcpy(&ssi->frags[1], &gl->frags[1],
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(gl->nfrags - 1) * sizeof(skb_frag_t));
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ssi->nr_frags = gl->nfrags;
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skb->len = gl->tot_len;
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skb->data_len = skb->len - pull_len;
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skb->truesize += skb->data_len;
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/* Get a reference for the last page, we don't own it */
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get_page(gl->frags[gl->nfrags - 1].page);
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}
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out:
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return skb;
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}
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static int c4iw_uld_rx_handler(void *handle, const __be64 *rsp,
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const struct pkt_gl *gl)
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{
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struct c4iw_dev *dev = handle;
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struct sk_buff *skb;
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const struct cpl_act_establish *rpl;
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unsigned int opcode;
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if (gl == NULL) {
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/* omit RSS and rsp_ctrl at end of descriptor */
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unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;
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skb = alloc_skb(256, GFP_ATOMIC);
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if (!skb)
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goto nomem;
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__skb_put(skb, len);
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skb_copy_to_linear_data(skb, &rsp[1], len);
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} else if (gl == CXGB4_MSG_AN) {
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const struct rsp_ctrl *rc = (void *)rsp;
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u32 qid = be32_to_cpu(rc->pldbuflen_qid);
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c4iw_ev_handler(dev, qid);
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return 0;
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} else {
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skb = t4_pktgl_to_skb(gl, 128, 128);
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if (unlikely(!skb))
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goto nomem;
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}
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rpl = cplhdr(skb);
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opcode = rpl->ot.opcode;
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if (c4iw_handlers[opcode])
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c4iw_handlers[opcode](dev, skb);
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else
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printk(KERN_INFO "%s no handler opcode 0x%x...\n", __func__,
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opcode);
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return 0;
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nomem:
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return -1;
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}
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static int c4iw_uld_state_change(void *handle, enum cxgb4_state new_state)
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{
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struct c4iw_dev *dev = handle;
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PDBG("%s new_state %u\n", __func__, new_state);
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switch (new_state) {
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case CXGB4_STATE_UP:
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printk(KERN_INFO MOD "%s: Up\n", pci_name(dev->rdev.lldi.pdev));
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if (!dev->registered) {
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int ret;
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ret = c4iw_register_device(dev);
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if (ret)
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printk(KERN_ERR MOD
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"%s: RDMA registration failed: %d\n",
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pci_name(dev->rdev.lldi.pdev), ret);
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}
|
|
break;
|
|
case CXGB4_STATE_DOWN:
|
|
printk(KERN_INFO MOD "%s: Down\n",
|
|
pci_name(dev->rdev.lldi.pdev));
|
|
if (dev->registered)
|
|
c4iw_unregister_device(dev);
|
|
break;
|
|
case CXGB4_STATE_START_RECOVERY:
|
|
printk(KERN_INFO MOD "%s: Fatal Error\n",
|
|
pci_name(dev->rdev.lldi.pdev));
|
|
if (dev->registered)
|
|
c4iw_unregister_device(dev);
|
|
break;
|
|
case CXGB4_STATE_DETACH:
|
|
printk(KERN_INFO MOD "%s: Detach\n",
|
|
pci_name(dev->rdev.lldi.pdev));
|
|
mutex_lock(&dev_mutex);
|
|
c4iw_remove(dev);
|
|
mutex_unlock(&dev_mutex);
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static struct cxgb4_uld_info c4iw_uld_info = {
|
|
.name = DRV_NAME,
|
|
.add = c4iw_uld_add,
|
|
.rx_handler = c4iw_uld_rx_handler,
|
|
.state_change = c4iw_uld_state_change,
|
|
};
|
|
|
|
static int __init c4iw_init_module(void)
|
|
{
|
|
int err;
|
|
|
|
err = c4iw_cm_init();
|
|
if (err)
|
|
return err;
|
|
|
|
c4iw_debugfs_root = debugfs_create_dir(DRV_NAME, NULL);
|
|
if (!c4iw_debugfs_root)
|
|
printk(KERN_WARNING MOD
|
|
"could not create debugfs entry, continuing\n");
|
|
|
|
cxgb4_register_uld(CXGB4_ULD_RDMA, &c4iw_uld_info);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit c4iw_exit_module(void)
|
|
{
|
|
struct c4iw_dev *dev, *tmp;
|
|
|
|
mutex_lock(&dev_mutex);
|
|
list_for_each_entry_safe(dev, tmp, &dev_list, entry) {
|
|
c4iw_remove(dev);
|
|
}
|
|
mutex_unlock(&dev_mutex);
|
|
cxgb4_unregister_uld(CXGB4_ULD_RDMA);
|
|
c4iw_cm_term();
|
|
debugfs_remove_recursive(c4iw_debugfs_root);
|
|
}
|
|
|
|
module_init(c4iw_init_module);
|
|
module_exit(c4iw_exit_module);
|