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ec3eead217
Using kfifos for ID management was limiting the number of QPs and preventing NP384 MPI jobs. So replace it with a simple bitmap allocator. Remove IDs from the IDR tables before deallocating them. This bug was causing the BUG_ON() in insert_handle() to fire because the ID was getting reused before being removed from the IDR table. Signed-off-by: Vipul Pandya <vipul@chelsio.com> Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
948 lines
24 KiB
C
948 lines
24 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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struct uld_ctx {
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struct list_head entry;
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struct cxgb4_lld_info lldi;
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struct c4iw_dev *dev;
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};
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static LIST_HEAD(uld_ctx_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 c4iw_debugfs_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_idrs(int id, void *p, void *data)
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{
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int *countp = data;
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*countp = *countp + 1;
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return 0;
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}
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static ssize_t debugfs_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 c4iw_debugfs_data *d = file->private_data;
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return simple_read_from_buffer(buf, count, ppos, d->buf, d->pos);
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}
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static int dump_qp(int id, void *p, void *data)
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{
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struct c4iw_qp *qp = p;
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struct c4iw_debugfs_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,
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"qp sq id %u rq id %u state %u onchip %u "
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"ep tid %u state %u %pI4:%u->%pI4:%u\n",
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qp->wq.sq.qid, qp->wq.rq.qid, (int)qp->attr.state,
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qp->wq.sq.flags & T4_SQ_ONCHIP,
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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,
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"qp sq id %u rq id %u state %u onchip %u\n",
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qp->wq.sq.qid, qp->wq.rq.qid,
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(int)qp->attr.state,
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qp->wq.sq.flags & T4_SQ_ONCHIP);
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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 c4iw_debugfs_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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vfree(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 c4iw_debugfs_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_idrs, &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 = vmalloc(qpd->bufsize);
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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_qp, 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 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 = debugfs_read,
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.llseek = default_llseek,
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};
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static int dump_stag(int id, void *p, void *data)
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{
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struct c4iw_debugfs_data *stagd = data;
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int space;
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int cc;
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space = stagd->bufsize - stagd->pos - 1;
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if (space == 0)
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return 1;
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cc = snprintf(stagd->buf + stagd->pos, space, "0x%x\n", id<<8);
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if (cc < space)
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stagd->pos += cc;
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return 0;
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}
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static int stag_release(struct inode *inode, struct file *file)
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{
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struct c4iw_debugfs_data *stagd = file->private_data;
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if (!stagd) {
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printk(KERN_INFO "%s null stagd?\n", __func__);
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return 0;
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}
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kfree(stagd->buf);
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kfree(stagd);
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return 0;
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}
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static int stag_open(struct inode *inode, struct file *file)
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{
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struct c4iw_debugfs_data *stagd;
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int ret = 0;
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int count = 1;
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stagd = kmalloc(sizeof *stagd, GFP_KERNEL);
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if (!stagd) {
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ret = -ENOMEM;
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goto out;
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}
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stagd->devp = inode->i_private;
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stagd->pos = 0;
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spin_lock_irq(&stagd->devp->lock);
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idr_for_each(&stagd->devp->mmidr, count_idrs, &count);
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spin_unlock_irq(&stagd->devp->lock);
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stagd->bufsize = count * sizeof("0x12345678\n");
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stagd->buf = kmalloc(stagd->bufsize, GFP_KERNEL);
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if (!stagd->buf) {
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ret = -ENOMEM;
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goto err1;
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}
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spin_lock_irq(&stagd->devp->lock);
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idr_for_each(&stagd->devp->mmidr, dump_stag, stagd);
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spin_unlock_irq(&stagd->devp->lock);
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stagd->buf[stagd->pos++] = 0;
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file->private_data = stagd;
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goto out;
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err1:
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kfree(stagd);
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out:
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return ret;
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}
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static const struct file_operations stag_debugfs_fops = {
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.owner = THIS_MODULE,
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.open = stag_open,
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.release = stag_release,
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.read = debugfs_read,
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.llseek = default_llseek,
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};
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static char *db_state_str[] = {"NORMAL", "FLOW_CONTROL", "RECOVERY"};
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static int stats_show(struct seq_file *seq, void *v)
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{
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struct c4iw_dev *dev = seq->private;
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seq_printf(seq, " Object: %10s %10s %10s %10s\n", "Total", "Current",
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"Max", "Fail");
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seq_printf(seq, " PDID: %10llu %10llu %10llu %10llu\n",
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dev->rdev.stats.pd.total, dev->rdev.stats.pd.cur,
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dev->rdev.stats.pd.max, dev->rdev.stats.pd.fail);
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seq_printf(seq, " QID: %10llu %10llu %10llu %10llu\n",
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dev->rdev.stats.qid.total, dev->rdev.stats.qid.cur,
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dev->rdev.stats.qid.max, dev->rdev.stats.qid.fail);
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seq_printf(seq, " TPTMEM: %10llu %10llu %10llu %10llu\n",
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dev->rdev.stats.stag.total, dev->rdev.stats.stag.cur,
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dev->rdev.stats.stag.max, dev->rdev.stats.stag.fail);
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seq_printf(seq, " PBLMEM: %10llu %10llu %10llu %10llu\n",
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dev->rdev.stats.pbl.total, dev->rdev.stats.pbl.cur,
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dev->rdev.stats.pbl.max, dev->rdev.stats.pbl.fail);
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seq_printf(seq, " RQTMEM: %10llu %10llu %10llu %10llu\n",
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dev->rdev.stats.rqt.total, dev->rdev.stats.rqt.cur,
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dev->rdev.stats.rqt.max, dev->rdev.stats.rqt.fail);
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seq_printf(seq, " OCQPMEM: %10llu %10llu %10llu %10llu\n",
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dev->rdev.stats.ocqp.total, dev->rdev.stats.ocqp.cur,
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dev->rdev.stats.ocqp.max, dev->rdev.stats.ocqp.fail);
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seq_printf(seq, " DB FULL: %10llu\n", dev->rdev.stats.db_full);
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seq_printf(seq, " DB EMPTY: %10llu\n", dev->rdev.stats.db_empty);
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seq_printf(seq, " DB DROP: %10llu\n", dev->rdev.stats.db_drop);
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seq_printf(seq, " DB State: %s Transitions %llu\n",
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db_state_str[dev->db_state],
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dev->rdev.stats.db_state_transitions);
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return 0;
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}
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static int stats_open(struct inode *inode, struct file *file)
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{
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return single_open(file, stats_show, inode->i_private);
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}
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static ssize_t stats_clear(struct file *file, const char __user *buf,
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size_t count, loff_t *pos)
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{
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struct c4iw_dev *dev = ((struct seq_file *)file->private_data)->private;
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mutex_lock(&dev->rdev.stats.lock);
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dev->rdev.stats.pd.max = 0;
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dev->rdev.stats.pd.fail = 0;
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dev->rdev.stats.qid.max = 0;
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dev->rdev.stats.qid.fail = 0;
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dev->rdev.stats.stag.max = 0;
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dev->rdev.stats.stag.fail = 0;
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dev->rdev.stats.pbl.max = 0;
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dev->rdev.stats.pbl.fail = 0;
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dev->rdev.stats.rqt.max = 0;
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dev->rdev.stats.rqt.fail = 0;
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dev->rdev.stats.ocqp.max = 0;
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dev->rdev.stats.ocqp.fail = 0;
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dev->rdev.stats.db_full = 0;
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dev->rdev.stats.db_empty = 0;
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dev->rdev.stats.db_drop = 0;
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dev->rdev.stats.db_state_transitions = 0;
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mutex_unlock(&dev->rdev.stats.lock);
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return count;
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}
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static const struct file_operations stats_debugfs_fops = {
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.owner = THIS_MODULE,
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.open = stats_open,
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.release = single_release,
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.read = seq_read,
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.llseek = seq_lseek,
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.write = stats_clear,
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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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de = debugfs_create_file("stags", S_IWUSR, devp->debugfs_root,
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(void *)devp, &stag_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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de = debugfs_create_file("stats", S_IWUSR, devp->debugfs_root,
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(void *)devp, &stats_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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|
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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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|
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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_table,
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entry->qid);
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mutex_lock(&rdev->stats.lock);
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rdev->stats.qid.cur -= rdev->qpmask + 1;
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mutex_unlock(&rdev->stats.lock);
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}
|
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kfree(entry);
|
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}
|
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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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}
|
|
|
|
/* Caller takes care of locking if needed */
|
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static int c4iw_rdev_open(struct c4iw_rdev *rdev)
|
|
{
|
|
int err;
|
|
|
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c4iw_init_dev_ucontext(rdev, &rdev->uctx);
|
|
|
|
/*
|
|
* 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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rdev->qpshift = PAGE_SHIFT - ilog2(rdev->lldi.udb_density);
|
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rdev->qpmask = rdev->lldi.udb_density - 1;
|
|
rdev->cqshift = PAGE_SHIFT - ilog2(rdev->lldi.ucq_density);
|
|
rdev->cqmask = rdev->lldi.ucq_density - 1;
|
|
PDBG("%s dev %s stag start 0x%0x size 0x%0x num stags %d "
|
|
"pbl start 0x%0x size 0x%0x rq start 0x%0x size 0x%0x "
|
|
"qp qid start %u size %u cq qid start %u size %u\n",
|
|
__func__, pci_name(rdev->lldi.pdev), rdev->lldi.vr->stag.start,
|
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rdev->lldi.vr->stag.size, c4iw_num_stags(rdev),
|
|
rdev->lldi.vr->pbl.start,
|
|
rdev->lldi.vr->pbl.size, rdev->lldi.vr->rq.start,
|
|
rdev->lldi.vr->rq.size,
|
|
rdev->lldi.vr->qp.start,
|
|
rdev->lldi.vr->qp.size,
|
|
rdev->lldi.vr->cq.start,
|
|
rdev->lldi.vr->cq.size);
|
|
PDBG("udb len 0x%x udb base %p db_reg %p gts_reg %p qpshift %lu "
|
|
"qpmask 0x%x cqshift %lu cqmask 0x%x\n",
|
|
(unsigned)pci_resource_len(rdev->lldi.pdev, 2),
|
|
(void *)pci_resource_start(rdev->lldi.pdev, 2),
|
|
rdev->lldi.db_reg,
|
|
rdev->lldi.gts_reg,
|
|
rdev->qpshift, rdev->qpmask,
|
|
rdev->cqshift, rdev->cqmask);
|
|
|
|
if (c4iw_num_stags(rdev) == 0) {
|
|
err = -EINVAL;
|
|
goto err1;
|
|
}
|
|
|
|
rdev->stats.pd.total = T4_MAX_NUM_PD;
|
|
rdev->stats.stag.total = rdev->lldi.vr->stag.size;
|
|
rdev->stats.pbl.total = rdev->lldi.vr->pbl.size;
|
|
rdev->stats.rqt.total = rdev->lldi.vr->rq.size;
|
|
rdev->stats.ocqp.total = rdev->lldi.vr->ocq.size;
|
|
rdev->stats.qid.total = rdev->lldi.vr->qp.size;
|
|
|
|
err = c4iw_init_resource(rdev, c4iw_num_stags(rdev), T4_MAX_NUM_PD);
|
|
if (err) {
|
|
printk(KERN_ERR MOD "error %d initializing resources\n", err);
|
|
goto err1;
|
|
}
|
|
err = c4iw_pblpool_create(rdev);
|
|
if (err) {
|
|
printk(KERN_ERR MOD "error %d initializing pbl pool\n", err);
|
|
goto err2;
|
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}
|
|
err = c4iw_rqtpool_create(rdev);
|
|
if (err) {
|
|
printk(KERN_ERR MOD "error %d initializing rqt pool\n", err);
|
|
goto err3;
|
|
}
|
|
err = c4iw_ocqp_pool_create(rdev);
|
|
if (err) {
|
|
printk(KERN_ERR MOD "error %d initializing ocqp pool\n", err);
|
|
goto err4;
|
|
}
|
|
return 0;
|
|
err4:
|
|
c4iw_rqtpool_destroy(rdev);
|
|
err3:
|
|
c4iw_pblpool_destroy(rdev);
|
|
err2:
|
|
c4iw_destroy_resource(&rdev->resource);
|
|
err1:
|
|
return err;
|
|
}
|
|
|
|
static void c4iw_rdev_close(struct c4iw_rdev *rdev)
|
|
{
|
|
c4iw_pblpool_destroy(rdev);
|
|
c4iw_rqtpool_destroy(rdev);
|
|
c4iw_destroy_resource(&rdev->resource);
|
|
}
|
|
|
|
static void c4iw_dealloc(struct uld_ctx *ctx)
|
|
{
|
|
c4iw_rdev_close(&ctx->dev->rdev);
|
|
idr_destroy(&ctx->dev->cqidr);
|
|
idr_destroy(&ctx->dev->qpidr);
|
|
idr_destroy(&ctx->dev->mmidr);
|
|
iounmap(ctx->dev->rdev.oc_mw_kva);
|
|
ib_dealloc_device(&ctx->dev->ibdev);
|
|
ctx->dev = NULL;
|
|
}
|
|
|
|
static void c4iw_remove(struct uld_ctx *ctx)
|
|
{
|
|
PDBG("%s c4iw_dev %p\n", __func__, ctx->dev);
|
|
c4iw_unregister_device(ctx->dev);
|
|
c4iw_dealloc(ctx);
|
|
}
|
|
|
|
static int rdma_supported(const struct cxgb4_lld_info *infop)
|
|
{
|
|
return infop->vr->stag.size > 0 && infop->vr->pbl.size > 0 &&
|
|
infop->vr->rq.size > 0 && infop->vr->qp.size > 0 &&
|
|
infop->vr->cq.size > 0 && infop->vr->ocq.size > 0;
|
|
}
|
|
|
|
static struct c4iw_dev *c4iw_alloc(const struct cxgb4_lld_info *infop)
|
|
{
|
|
struct c4iw_dev *devp;
|
|
int ret;
|
|
|
|
if (!rdma_supported(infop)) {
|
|
printk(KERN_INFO MOD "%s: RDMA not supported on this device.\n",
|
|
pci_name(infop->pdev));
|
|
return ERR_PTR(-ENOSYS);
|
|
}
|
|
devp = (struct c4iw_dev *)ib_alloc_device(sizeof(*devp));
|
|
if (!devp) {
|
|
printk(KERN_ERR MOD "Cannot allocate ib device\n");
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
devp->rdev.lldi = *infop;
|
|
|
|
devp->rdev.oc_mw_pa = pci_resource_start(devp->rdev.lldi.pdev, 2) +
|
|
(pci_resource_len(devp->rdev.lldi.pdev, 2) -
|
|
roundup_pow_of_two(devp->rdev.lldi.vr->ocq.size));
|
|
devp->rdev.oc_mw_kva = ioremap_wc(devp->rdev.oc_mw_pa,
|
|
devp->rdev.lldi.vr->ocq.size);
|
|
|
|
PDBG(KERN_INFO MOD "ocq memory: "
|
|
"hw_start 0x%x size %u mw_pa 0x%lx mw_kva %p\n",
|
|
devp->rdev.lldi.vr->ocq.start, devp->rdev.lldi.vr->ocq.size,
|
|
devp->rdev.oc_mw_pa, devp->rdev.oc_mw_kva);
|
|
|
|
ret = c4iw_rdev_open(&devp->rdev);
|
|
if (ret) {
|
|
printk(KERN_ERR MOD "Unable to open CXIO rdev err %d\n", ret);
|
|
ib_dealloc_device(&devp->ibdev);
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
idr_init(&devp->cqidr);
|
|
idr_init(&devp->qpidr);
|
|
idr_init(&devp->mmidr);
|
|
spin_lock_init(&devp->lock);
|
|
mutex_init(&devp->rdev.stats.lock);
|
|
mutex_init(&devp->db_mutex);
|
|
|
|
if (c4iw_debugfs_root) {
|
|
devp->debugfs_root = debugfs_create_dir(
|
|
pci_name(devp->rdev.lldi.pdev),
|
|
c4iw_debugfs_root);
|
|
setup_debugfs(devp);
|
|
}
|
|
return devp;
|
|
}
|
|
|
|
static void *c4iw_uld_add(const struct cxgb4_lld_info *infop)
|
|
{
|
|
struct uld_ctx *ctx;
|
|
static int vers_printed;
|
|
int i;
|
|
|
|
if (!vers_printed++)
|
|
printk(KERN_INFO MOD "Chelsio T4 RDMA Driver - version %s\n",
|
|
DRV_VERSION);
|
|
|
|
ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
|
|
if (!ctx) {
|
|
ctx = ERR_PTR(-ENOMEM);
|
|
goto out;
|
|
}
|
|
ctx->lldi = *infop;
|
|
|
|
PDBG("%s found device %s nchan %u nrxq %u ntxq %u nports %u\n",
|
|
__func__, pci_name(ctx->lldi.pdev),
|
|
ctx->lldi.nchan, ctx->lldi.nrxq,
|
|
ctx->lldi.ntxq, ctx->lldi.nports);
|
|
|
|
mutex_lock(&dev_mutex);
|
|
list_add_tail(&ctx->entry, &uld_ctx_list);
|
|
mutex_unlock(&dev_mutex);
|
|
|
|
for (i = 0; i < ctx->lldi.nrxq; i++)
|
|
PDBG("rxqid[%u] %u\n", i, ctx->lldi.rxq_ids[i]);
|
|
out:
|
|
return ctx;
|
|
}
|
|
|
|
static int c4iw_uld_rx_handler(void *handle, const __be64 *rsp,
|
|
const struct pkt_gl *gl)
|
|
{
|
|
struct uld_ctx *ctx = handle;
|
|
struct c4iw_dev *dev = ctx->dev;
|
|
struct sk_buff *skb;
|
|
const struct cpl_act_establish *rpl;
|
|
unsigned int opcode;
|
|
|
|
if (gl == NULL) {
|
|
/* omit RSS and rsp_ctrl at end of descriptor */
|
|
unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;
|
|
|
|
skb = alloc_skb(256, GFP_ATOMIC);
|
|
if (!skb)
|
|
goto nomem;
|
|
__skb_put(skb, len);
|
|
skb_copy_to_linear_data(skb, &rsp[1], len);
|
|
} else if (gl == CXGB4_MSG_AN) {
|
|
const struct rsp_ctrl *rc = (void *)rsp;
|
|
|
|
u32 qid = be32_to_cpu(rc->pldbuflen_qid);
|
|
c4iw_ev_handler(dev, qid);
|
|
return 0;
|
|
} else {
|
|
skb = cxgb4_pktgl_to_skb(gl, 128, 128);
|
|
if (unlikely(!skb))
|
|
goto nomem;
|
|
}
|
|
|
|
rpl = cplhdr(skb);
|
|
opcode = rpl->ot.opcode;
|
|
|
|
if (c4iw_handlers[opcode])
|
|
c4iw_handlers[opcode](dev, skb);
|
|
else
|
|
printk(KERN_INFO "%s no handler opcode 0x%x...\n", __func__,
|
|
opcode);
|
|
|
|
return 0;
|
|
nomem:
|
|
return -1;
|
|
}
|
|
|
|
static int c4iw_uld_state_change(void *handle, enum cxgb4_state new_state)
|
|
{
|
|
struct uld_ctx *ctx = handle;
|
|
|
|
PDBG("%s new_state %u\n", __func__, new_state);
|
|
switch (new_state) {
|
|
case CXGB4_STATE_UP:
|
|
printk(KERN_INFO MOD "%s: Up\n", pci_name(ctx->lldi.pdev));
|
|
if (!ctx->dev) {
|
|
int ret;
|
|
|
|
ctx->dev = c4iw_alloc(&ctx->lldi);
|
|
if (IS_ERR(ctx->dev)) {
|
|
printk(KERN_ERR MOD
|
|
"%s: initialization failed: %ld\n",
|
|
pci_name(ctx->lldi.pdev),
|
|
PTR_ERR(ctx->dev));
|
|
ctx->dev = NULL;
|
|
break;
|
|
}
|
|
ret = c4iw_register_device(ctx->dev);
|
|
if (ret) {
|
|
printk(KERN_ERR MOD
|
|
"%s: RDMA registration failed: %d\n",
|
|
pci_name(ctx->lldi.pdev), ret);
|
|
c4iw_dealloc(ctx);
|
|
}
|
|
}
|
|
break;
|
|
case CXGB4_STATE_DOWN:
|
|
printk(KERN_INFO MOD "%s: Down\n",
|
|
pci_name(ctx->lldi.pdev));
|
|
if (ctx->dev)
|
|
c4iw_remove(ctx);
|
|
break;
|
|
case CXGB4_STATE_START_RECOVERY:
|
|
printk(KERN_INFO MOD "%s: Fatal Error\n",
|
|
pci_name(ctx->lldi.pdev));
|
|
if (ctx->dev) {
|
|
struct ib_event event;
|
|
|
|
ctx->dev->rdev.flags |= T4_FATAL_ERROR;
|
|
memset(&event, 0, sizeof event);
|
|
event.event = IB_EVENT_DEVICE_FATAL;
|
|
event.device = &ctx->dev->ibdev;
|
|
ib_dispatch_event(&event);
|
|
c4iw_remove(ctx);
|
|
}
|
|
break;
|
|
case CXGB4_STATE_DETACH:
|
|
printk(KERN_INFO MOD "%s: Detach\n",
|
|
pci_name(ctx->lldi.pdev));
|
|
if (ctx->dev)
|
|
c4iw_remove(ctx);
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int disable_qp_db(int id, void *p, void *data)
|
|
{
|
|
struct c4iw_qp *qp = p;
|
|
|
|
t4_disable_wq_db(&qp->wq);
|
|
return 0;
|
|
}
|
|
|
|
static void stop_queues(struct uld_ctx *ctx)
|
|
{
|
|
spin_lock_irq(&ctx->dev->lock);
|
|
if (ctx->dev->db_state == NORMAL) {
|
|
ctx->dev->rdev.stats.db_state_transitions++;
|
|
ctx->dev->db_state = FLOW_CONTROL;
|
|
idr_for_each(&ctx->dev->qpidr, disable_qp_db, NULL);
|
|
}
|
|
spin_unlock_irq(&ctx->dev->lock);
|
|
}
|
|
|
|
static int enable_qp_db(int id, void *p, void *data)
|
|
{
|
|
struct c4iw_qp *qp = p;
|
|
|
|
t4_enable_wq_db(&qp->wq);
|
|
return 0;
|
|
}
|
|
|
|
static void resume_queues(struct uld_ctx *ctx)
|
|
{
|
|
spin_lock_irq(&ctx->dev->lock);
|
|
if (ctx->dev->qpcnt <= db_fc_threshold &&
|
|
ctx->dev->db_state == FLOW_CONTROL) {
|
|
ctx->dev->db_state = NORMAL;
|
|
ctx->dev->rdev.stats.db_state_transitions++;
|
|
idr_for_each(&ctx->dev->qpidr, enable_qp_db, NULL);
|
|
}
|
|
spin_unlock_irq(&ctx->dev->lock);
|
|
}
|
|
|
|
struct qp_list {
|
|
unsigned idx;
|
|
struct c4iw_qp **qps;
|
|
};
|
|
|
|
static int add_and_ref_qp(int id, void *p, void *data)
|
|
{
|
|
struct qp_list *qp_listp = data;
|
|
struct c4iw_qp *qp = p;
|
|
|
|
c4iw_qp_add_ref(&qp->ibqp);
|
|
qp_listp->qps[qp_listp->idx++] = qp;
|
|
return 0;
|
|
}
|
|
|
|
static int count_qps(int id, void *p, void *data)
|
|
{
|
|
unsigned *countp = data;
|
|
(*countp)++;
|
|
return 0;
|
|
}
|
|
|
|
static void deref_qps(struct qp_list qp_list)
|
|
{
|
|
int idx;
|
|
|
|
for (idx = 0; idx < qp_list.idx; idx++)
|
|
c4iw_qp_rem_ref(&qp_list.qps[idx]->ibqp);
|
|
}
|
|
|
|
static void recover_lost_dbs(struct uld_ctx *ctx, struct qp_list *qp_list)
|
|
{
|
|
int idx;
|
|
int ret;
|
|
|
|
for (idx = 0; idx < qp_list->idx; idx++) {
|
|
struct c4iw_qp *qp = qp_list->qps[idx];
|
|
|
|
ret = cxgb4_sync_txq_pidx(qp->rhp->rdev.lldi.ports[0],
|
|
qp->wq.sq.qid,
|
|
t4_sq_host_wq_pidx(&qp->wq),
|
|
t4_sq_wq_size(&qp->wq));
|
|
if (ret) {
|
|
printk(KERN_ERR MOD "%s: Fatal error - "
|
|
"DB overflow recovery failed - "
|
|
"error syncing SQ qid %u\n",
|
|
pci_name(ctx->lldi.pdev), qp->wq.sq.qid);
|
|
return;
|
|
}
|
|
|
|
ret = cxgb4_sync_txq_pidx(qp->rhp->rdev.lldi.ports[0],
|
|
qp->wq.rq.qid,
|
|
t4_rq_host_wq_pidx(&qp->wq),
|
|
t4_rq_wq_size(&qp->wq));
|
|
|
|
if (ret) {
|
|
printk(KERN_ERR MOD "%s: Fatal error - "
|
|
"DB overflow recovery failed - "
|
|
"error syncing RQ qid %u\n",
|
|
pci_name(ctx->lldi.pdev), qp->wq.rq.qid);
|
|
return;
|
|
}
|
|
|
|
/* Wait for the dbfifo to drain */
|
|
while (cxgb4_dbfifo_count(qp->rhp->rdev.lldi.ports[0], 1) > 0) {
|
|
set_current_state(TASK_UNINTERRUPTIBLE);
|
|
schedule_timeout(usecs_to_jiffies(10));
|
|
}
|
|
}
|
|
}
|
|
|
|
static void recover_queues(struct uld_ctx *ctx)
|
|
{
|
|
int count = 0;
|
|
struct qp_list qp_list;
|
|
int ret;
|
|
|
|
/* lock out kernel db ringers */
|
|
mutex_lock(&ctx->dev->db_mutex);
|
|
|
|
/* put all queues in to recovery mode */
|
|
spin_lock_irq(&ctx->dev->lock);
|
|
ctx->dev->db_state = RECOVERY;
|
|
ctx->dev->rdev.stats.db_state_transitions++;
|
|
idr_for_each(&ctx->dev->qpidr, disable_qp_db, NULL);
|
|
spin_unlock_irq(&ctx->dev->lock);
|
|
|
|
/* slow everybody down */
|
|
set_current_state(TASK_UNINTERRUPTIBLE);
|
|
schedule_timeout(usecs_to_jiffies(1000));
|
|
|
|
/* Wait for the dbfifo to completely drain. */
|
|
while (cxgb4_dbfifo_count(ctx->dev->rdev.lldi.ports[0], 1) > 0) {
|
|
set_current_state(TASK_UNINTERRUPTIBLE);
|
|
schedule_timeout(usecs_to_jiffies(10));
|
|
}
|
|
|
|
/* flush the SGE contexts */
|
|
ret = cxgb4_flush_eq_cache(ctx->dev->rdev.lldi.ports[0]);
|
|
if (ret) {
|
|
printk(KERN_ERR MOD "%s: Fatal error - DB overflow recovery failed\n",
|
|
pci_name(ctx->lldi.pdev));
|
|
goto out;
|
|
}
|
|
|
|
/* Count active queues so we can build a list of queues to recover */
|
|
spin_lock_irq(&ctx->dev->lock);
|
|
idr_for_each(&ctx->dev->qpidr, count_qps, &count);
|
|
|
|
qp_list.qps = kzalloc(count * sizeof *qp_list.qps, GFP_ATOMIC);
|
|
if (!qp_list.qps) {
|
|
printk(KERN_ERR MOD "%s: Fatal error - DB overflow recovery failed\n",
|
|
pci_name(ctx->lldi.pdev));
|
|
spin_unlock_irq(&ctx->dev->lock);
|
|
goto out;
|
|
}
|
|
qp_list.idx = 0;
|
|
|
|
/* add and ref each qp so it doesn't get freed */
|
|
idr_for_each(&ctx->dev->qpidr, add_and_ref_qp, &qp_list);
|
|
|
|
spin_unlock_irq(&ctx->dev->lock);
|
|
|
|
/* now traverse the list in a safe context to recover the db state*/
|
|
recover_lost_dbs(ctx, &qp_list);
|
|
|
|
/* we're almost done! deref the qps and clean up */
|
|
deref_qps(qp_list);
|
|
kfree(qp_list.qps);
|
|
|
|
/* Wait for the dbfifo to completely drain again */
|
|
while (cxgb4_dbfifo_count(ctx->dev->rdev.lldi.ports[0], 1) > 0) {
|
|
set_current_state(TASK_UNINTERRUPTIBLE);
|
|
schedule_timeout(usecs_to_jiffies(10));
|
|
}
|
|
|
|
/* resume the queues */
|
|
spin_lock_irq(&ctx->dev->lock);
|
|
if (ctx->dev->qpcnt > db_fc_threshold)
|
|
ctx->dev->db_state = FLOW_CONTROL;
|
|
else {
|
|
ctx->dev->db_state = NORMAL;
|
|
idr_for_each(&ctx->dev->qpidr, enable_qp_db, NULL);
|
|
}
|
|
ctx->dev->rdev.stats.db_state_transitions++;
|
|
spin_unlock_irq(&ctx->dev->lock);
|
|
|
|
out:
|
|
/* start up kernel db ringers again */
|
|
mutex_unlock(&ctx->dev->db_mutex);
|
|
}
|
|
|
|
static int c4iw_uld_control(void *handle, enum cxgb4_control control, ...)
|
|
{
|
|
struct uld_ctx *ctx = handle;
|
|
|
|
switch (control) {
|
|
case CXGB4_CONTROL_DB_FULL:
|
|
stop_queues(ctx);
|
|
mutex_lock(&ctx->dev->rdev.stats.lock);
|
|
ctx->dev->rdev.stats.db_full++;
|
|
mutex_unlock(&ctx->dev->rdev.stats.lock);
|
|
break;
|
|
case CXGB4_CONTROL_DB_EMPTY:
|
|
resume_queues(ctx);
|
|
mutex_lock(&ctx->dev->rdev.stats.lock);
|
|
ctx->dev->rdev.stats.db_empty++;
|
|
mutex_unlock(&ctx->dev->rdev.stats.lock);
|
|
break;
|
|
case CXGB4_CONTROL_DB_DROP:
|
|
recover_queues(ctx);
|
|
mutex_lock(&ctx->dev->rdev.stats.lock);
|
|
ctx->dev->rdev.stats.db_drop++;
|
|
mutex_unlock(&ctx->dev->rdev.stats.lock);
|
|
break;
|
|
default:
|
|
printk(KERN_WARNING MOD "%s: unknown control cmd %u\n",
|
|
pci_name(ctx->lldi.pdev), control);
|
|
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,
|
|
.control = c4iw_uld_control,
|
|
};
|
|
|
|
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 uld_ctx *ctx, *tmp;
|
|
|
|
mutex_lock(&dev_mutex);
|
|
list_for_each_entry_safe(ctx, tmp, &uld_ctx_list, entry) {
|
|
if (ctx->dev)
|
|
c4iw_remove(ctx);
|
|
kfree(ctx);
|
|
}
|
|
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);
|