| Current Path : /sys/amd64/compile/hs32/modules/usr/src/sys/modules/usb/urio/@/amd64/compile/hs32/modules/usr/src/sys/modules/rdma/iwcm/@/ofed/drivers/infiniband/ulp/ipoib/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/amd64/compile/hs32/modules/usr/src/sys/modules/usb/urio/@/amd64/compile/hs32/modules/usr/src/sys/modules/rdma/iwcm/@/ofed/drivers/infiniband/ulp/ipoib/ipoib_ib.c |
/*
* Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
* Copyright (c) 2005 Mellanox Technologies. All rights reserved.
* Copyright (c) 2004, 2005 Voltaire, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "ipoib.h"
#include <rdma/ib_cache.h>
#include <security/mac/mac_framework.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA
static int data_debug_level;
module_param(data_debug_level, int, 0644);
MODULE_PARM_DESC(data_debug_level,
"Enable data path debug tracing if > 0");
#endif
static DEFINE_MUTEX(pkey_mutex);
struct ipoib_ah *ipoib_create_ah(struct ipoib_dev_priv *priv,
struct ib_pd *pd, struct ib_ah_attr *attr)
{
struct ipoib_ah *ah;
ah = kmalloc(sizeof *ah, GFP_KERNEL);
if (!ah)
return NULL;
ah->priv = priv;
ah->last_send = 0;
kref_init(&ah->ref);
ah->ah = ib_create_ah(pd, attr);
if (IS_ERR(ah->ah)) {
kfree(ah);
ah = NULL;
} else
ipoib_dbg(priv, "Created ah %p\n", ah->ah);
return ah;
}
void ipoib_free_ah(struct kref *kref)
{
struct ipoib_ah *ah = container_of(kref, struct ipoib_ah, ref);
struct ipoib_dev_priv *priv = ah->priv;
unsigned long flags;
spin_lock_irqsave(&priv->lock, flags);
list_add_tail(&ah->list, &priv->dead_ahs);
spin_unlock_irqrestore(&priv->lock, flags);
}
void
ipoib_dma_unmap_rx(struct ipoib_dev_priv *priv, struct ipoib_rx_buf *rx_req)
{
struct mbuf *m;
int i;
for (i = 0, m = rx_req->mb; m != NULL; m = m->m_next, i++)
ib_dma_unmap_single(priv->ca, rx_req->mapping[i], m->m_len,
DMA_FROM_DEVICE);
}
void
ipoib_dma_mb(struct ipoib_dev_priv *priv, struct mbuf *mb, unsigned int length)
{
m_adj(mb, -(mb->m_pkthdr.len - length));
}
struct mbuf *
ipoib_alloc_map_mb(struct ipoib_dev_priv *priv, struct ipoib_rx_buf *rx_req,
int size)
{
struct mbuf *mb, *m;
int i, j;
rx_req->mb = NULL;
mb = m_getm2(NULL, size, M_NOWAIT, MT_DATA, M_PKTHDR);
if (mb == NULL)
return (NULL);
for (i = 0, m = mb; m != NULL; m = m->m_next, i++) {
m->m_len = (m->m_flags & M_EXT) ? m->m_ext.ext_size :
((m->m_flags & M_PKTHDR) ? MHLEN : MLEN);
mb->m_pkthdr.len += m->m_len;
rx_req->mapping[i] = ib_dma_map_single(priv->ca,
mtod(m, void *), m->m_len, DMA_FROM_DEVICE);
if (unlikely(ib_dma_mapping_error(priv->ca,
rx_req->mapping[i])))
goto error;
}
rx_req->mb = mb;
return (mb);
error:
for (j = 0, m = mb; j < i; m = m->m_next, j++)
ib_dma_unmap_single(priv->ca, rx_req->mapping[j], m->m_len,
DMA_FROM_DEVICE);
m_freem(mb);
return (NULL);
}
static int ipoib_ib_post_receive(struct ipoib_dev_priv *priv, int id)
{
struct ipoib_rx_buf *rx_req;
struct ib_recv_wr *bad_wr;
struct mbuf *m;
int ret;
int i;
rx_req = &priv->rx_ring[id];
for (m = rx_req->mb, i = 0; m != NULL; m = m->m_next, i++) {
priv->rx_sge[i].addr = rx_req->mapping[i];
priv->rx_sge[i].length = m->m_len;
}
priv->rx_wr.num_sge = i;
priv->rx_wr.wr_id = id | IPOIB_OP_RECV;
ret = ib_post_recv(priv->qp, &priv->rx_wr, &bad_wr);
if (unlikely(ret)) {
ipoib_warn(priv, "receive failed for buf %d (%d)\n", id, ret);
ipoib_dma_unmap_rx(priv, &priv->rx_ring[id]);
m_freem(priv->rx_ring[id].mb);
priv->rx_ring[id].mb = NULL;
}
return ret;
}
static struct mbuf *
ipoib_alloc_rx_mb(struct ipoib_dev_priv *priv, int id)
{
return ipoib_alloc_map_mb(priv, &priv->rx_ring[id],
priv->max_ib_mtu + IB_GRH_BYTES);
}
static int ipoib_ib_post_receives(struct ipoib_dev_priv *priv)
{
int i;
for (i = 0; i < ipoib_recvq_size; ++i) {
if (!ipoib_alloc_rx_mb(priv, i)) {
ipoib_warn(priv, "failed to allocate receive buffer %d\n", i);
return -ENOMEM;
}
if (ipoib_ib_post_receive(priv, i)) {
ipoib_warn(priv, "ipoib_ib_post_receive failed for buf %d\n", i);
return -EIO;
}
}
return 0;
}
static void
ipoib_ib_handle_rx_wc(struct ipoib_dev_priv *priv, struct ib_wc *wc)
{
struct ipoib_rx_buf saverx;
unsigned int wr_id = wc->wr_id & ~IPOIB_OP_RECV;
struct ifnet *dev = priv->dev;
struct ipoib_header *eh;
struct mbuf *mb;
ipoib_dbg_data(priv, "recv completion: id %d, status: %d\n",
wr_id, wc->status);
if (unlikely(wr_id >= ipoib_recvq_size)) {
ipoib_warn(priv, "recv completion event with wrid %d (> %d)\n",
wr_id, ipoib_recvq_size);
return;
}
mb = priv->rx_ring[wr_id].mb;
if (unlikely(wc->status != IB_WC_SUCCESS)) {
if (wc->status != IB_WC_WR_FLUSH_ERR) {
ipoib_warn(priv, "failed recv event "
"(status=%d, wrid=%d vend_err %x)\n",
wc->status, wr_id, wc->vendor_err);
goto repost;
}
if (mb) {
ipoib_dma_unmap_rx(priv, &priv->rx_ring[wr_id]);
m_freem(mb);
priv->rx_ring[wr_id].mb = NULL;
}
return;
}
/*
* Drop packets that this interface sent, ie multicast packets
* that the HCA has replicated.
*/
if (wc->slid == priv->local_lid && wc->src_qp == priv->qp->qp_num)
goto repost;
memcpy(&saverx, &priv->rx_ring[wr_id], sizeof(saverx));
/*
* If we can't allocate a new RX buffer, dump
* this packet and reuse the old buffer.
*/
if (unlikely(!ipoib_alloc_rx_mb(priv, wr_id))) {
memcpy(&priv->rx_ring[wr_id], &saverx, sizeof(saverx));
dev->if_iqdrops++;
goto repost;
}
ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n",
wc->byte_len, wc->slid);
ipoib_dma_unmap_rx(priv, &saverx);
ipoib_dma_mb(priv, mb, wc->byte_len);
++dev->if_ipackets;
dev->if_ibytes += mb->m_pkthdr.len;
mb->m_pkthdr.rcvif = dev;
m_adj(mb, sizeof(struct ib_grh) - INFINIBAND_ALEN);
eh = mtod(mb, struct ipoib_header *);
bzero(eh->hwaddr, 4); /* Zero the queue pair, only dgid is in grh */
if (test_bit(IPOIB_FLAG_CSUM, &priv->flags) && likely(wc->csum_ok))
mb->m_pkthdr.csum_flags = CSUM_IP_CHECKED | CSUM_IP_VALID;
dev->if_input(dev, mb);
repost:
if (unlikely(ipoib_ib_post_receive(priv, wr_id)))
ipoib_warn(priv, "ipoib_ib_post_receive failed "
"for buf %d\n", wr_id);
}
int ipoib_dma_map_tx(struct ib_device *ca, struct ipoib_tx_buf *tx_req, int max)
{
struct mbuf *mb = tx_req->mb;
u64 *mapping = tx_req->mapping;
struct mbuf *m, *p;
int error;
int i;
for (m = mb, p = NULL, i = 0; m != NULL; p = m, m = m->m_next, i++) {
if (m->m_len != 0)
continue;
if (p == NULL)
panic("ipoib_dma_map_tx: First mbuf empty\n");
p->m_next = m_free(m);
m = p;
i--;
}
i--;
if (i >= max) {
tx_req->mb = mb = m_defrag(mb, M_DONTWAIT);
if (mb == NULL)
return -EIO;
for (m = mb, i = 0; m != NULL; m = m->m_next, i++);
if (i >= max)
return -EIO;
}
error = 0;
for (m = mb, i = 0; m != NULL; m = m->m_next, i++) {
mapping[i] = ib_dma_map_single(ca, mtod(m, void *),
m->m_len, DMA_TO_DEVICE);
if (unlikely(ib_dma_mapping_error(ca, mapping[i]))) {
error = -EIO;
break;
}
}
if (error) {
int end;
end = i;
for (m = mb, i = 0; i < end; m = m->m_next, i++)
ib_dma_unmap_single(ca, mapping[i], m->m_len,
DMA_TO_DEVICE);
}
return error;
}
void ipoib_dma_unmap_tx(struct ib_device *ca, struct ipoib_tx_buf *tx_req)
{
struct mbuf *mb = tx_req->mb;
u64 *mapping = tx_req->mapping;
struct mbuf *m;
int i;
for (m = mb, i = 0; m != NULL; m = m->m_next, i++)
ib_dma_unmap_single(ca, mapping[i], m->m_len, DMA_TO_DEVICE);
}
static void ipoib_ib_handle_tx_wc(struct ipoib_dev_priv *priv, struct ib_wc *wc)
{
struct ifnet *dev = priv->dev;
unsigned int wr_id = wc->wr_id;
struct ipoib_tx_buf *tx_req;
ipoib_dbg_data(priv, "send completion: id %d, status: %d\n",
wr_id, wc->status);
if (unlikely(wr_id >= ipoib_sendq_size)) {
ipoib_warn(priv, "send completion event with wrid %d (> %d)\n",
wr_id, ipoib_sendq_size);
return;
}
tx_req = &priv->tx_ring[wr_id];
ipoib_dma_unmap_tx(priv->ca, tx_req);
++dev->if_opackets;
m_freem(tx_req->mb);
++priv->tx_tail;
if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) &&
(dev->if_drv_flags & IFF_DRV_OACTIVE) &&
test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags))
dev->if_drv_flags &= ~IFF_DRV_OACTIVE;
if (wc->status != IB_WC_SUCCESS &&
wc->status != IB_WC_WR_FLUSH_ERR)
ipoib_warn(priv, "failed send event "
"(status=%d, wrid=%d vend_err %x)\n",
wc->status, wr_id, wc->vendor_err);
}
int
ipoib_poll_tx(struct ipoib_dev_priv *priv)
{
int n, i;
n = ib_poll_cq(priv->send_cq, MAX_SEND_CQE, priv->send_wc);
for (i = 0; i < n; ++i) {
struct ib_wc *wc = priv->send_wc + i;
if (wc->wr_id & IPOIB_OP_CM)
ipoib_cm_handle_tx_wc(priv, wc);
else
ipoib_ib_handle_tx_wc(priv, wc);
}
return n == MAX_SEND_CQE;
}
static void
ipoib_poll(struct ipoib_dev_priv *priv)
{
int n, i;
poll_more:
for (;;) {
n = ib_poll_cq(priv->recv_cq, IPOIB_NUM_WC, priv->ibwc);
for (i = 0; i < n; i++) {
struct ib_wc *wc = priv->ibwc + i;
if ((wc->wr_id & IPOIB_OP_RECV) == 0)
panic("ipoib_poll: Bad wr_id 0x%jX\n",
(intmax_t)wc->wr_id);
if (wc->wr_id & IPOIB_OP_CM)
ipoib_cm_handle_rx_wc(priv, wc);
else
ipoib_ib_handle_rx_wc(priv, wc);
}
if (n != IPOIB_NUM_WC)
break;
}
if (ib_req_notify_cq(priv->recv_cq,
IB_CQ_NEXT_COMP | IB_CQ_REPORT_MISSED_EVENTS))
goto poll_more;
}
void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr)
{
struct ipoib_dev_priv *priv = dev_ptr;
ipoib_poll(priv);
}
static void drain_tx_cq(struct ipoib_dev_priv *priv)
{
struct ifnet *dev = priv->dev;
spin_lock(&priv->lock);
while (ipoib_poll_tx(priv))
; /* nothing */
if (dev->if_drv_flags & IFF_DRV_OACTIVE)
mod_timer(&priv->poll_timer, jiffies + 1);
spin_unlock(&priv->lock);
}
void ipoib_send_comp_handler(struct ib_cq *cq, void *dev_ptr)
{
struct ipoib_dev_priv *priv = dev_ptr;
mod_timer(&priv->poll_timer, jiffies);
}
static inline int
post_send(struct ipoib_dev_priv *priv, unsigned int wr_id,
struct ib_ah *address, u32 qpn, struct ipoib_tx_buf *tx_req, void *head,
int hlen)
{
struct ib_send_wr *bad_wr;
struct mbuf *mb = tx_req->mb;
u64 *mapping = tx_req->mapping;
struct mbuf *m;
int i;
for (m = mb, i = 0; m != NULL; m = m->m_next, i++) {
priv->tx_sge[i].addr = mapping[i];
priv->tx_sge[i].length = m->m_len;
}
priv->tx_wr.num_sge = i;
priv->tx_wr.wr_id = wr_id;
priv->tx_wr.wr.ud.remote_qpn = qpn;
priv->tx_wr.wr.ud.ah = address;
if (head) {
priv->tx_wr.wr.ud.mss = 0; /* XXX mb_shinfo(mb)->gso_size; */
priv->tx_wr.wr.ud.header = head;
priv->tx_wr.wr.ud.hlen = hlen;
priv->tx_wr.opcode = IB_WR_LSO;
} else
priv->tx_wr.opcode = IB_WR_SEND;
return ib_post_send(priv->qp, &priv->tx_wr, &bad_wr);
}
void
ipoib_send(struct ipoib_dev_priv *priv, struct mbuf *mb,
struct ipoib_ah *address, u32 qpn)
{
struct ifnet *dev = priv->dev;
struct ipoib_tx_buf *tx_req;
int hlen;
void *phead;
if (unlikely(priv->tx_outstanding > MAX_SEND_CQE))
while (ipoib_poll_tx(priv))
; /* nothing */
m_adj(mb, sizeof (struct ipoib_pseudoheader));
if (0 /* XXX segment offload mb_is_gso(mb) */) {
/* XXX hlen = mb_transport_offset(mb) + tcp_hdrlen(mb); */
phead = mtod(mb, void *);
if (mb->m_len < hlen) {
ipoib_warn(priv, "linear data too small\n");
++dev->if_oerrors;
m_freem(mb);
return;
}
m_adj(mb, hlen);
} else {
if (unlikely(mb->m_pkthdr.len - IPOIB_ENCAP_LEN > priv->mcast_mtu)) {
ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n",
mb->m_pkthdr.len, priv->mcast_mtu);
++dev->if_oerrors;
ipoib_cm_mb_too_long(priv, mb, priv->mcast_mtu);
return;
}
phead = NULL;
hlen = 0;
}
ipoib_dbg_data(priv, "sending packet, length=%d address=%p qpn=0x%06x\n",
mb->m_pkthdr.len, address, qpn);
/*
* We put the mb into the tx_ring _before_ we call post_send()
* because it's entirely possible that the completion handler will
* run before we execute anything after the post_send(). That
* means we have to make sure everything is properly recorded and
* our state is consistent before we call post_send().
*/
tx_req = &priv->tx_ring[priv->tx_head & (ipoib_sendq_size - 1)];
tx_req->mb = mb;
if (unlikely(ipoib_dma_map_tx(priv->ca, tx_req, IPOIB_UD_TX_SG))) {
++dev->if_oerrors;
if (tx_req->mb)
m_freem(tx_req->mb);
return;
}
if (mb->m_pkthdr.csum_flags & (CSUM_IP|CSUM_TCP|CSUM_UDP))
priv->tx_wr.send_flags |= IB_SEND_IP_CSUM;
else
priv->tx_wr.send_flags &= ~IB_SEND_IP_CSUM;
if (++priv->tx_outstanding == ipoib_sendq_size) {
ipoib_dbg(priv, "TX ring full, stopping kernel net queue\n");
if (ib_req_notify_cq(priv->send_cq, IB_CQ_NEXT_COMP))
ipoib_warn(priv, "request notify on send CQ failed\n");
dev->if_drv_flags |= IFF_DRV_OACTIVE;
}
if (unlikely(post_send(priv,
priv->tx_head & (ipoib_sendq_size - 1), address->ah, qpn,
tx_req, phead, hlen))) {
ipoib_warn(priv, "post_send failed\n");
++dev->if_oerrors;
--priv->tx_outstanding;
ipoib_dma_unmap_tx(priv->ca, tx_req);
m_freem(mb);
if (dev->if_drv_flags & IFF_DRV_OACTIVE)
dev->if_drv_flags &= ~IFF_DRV_OACTIVE;
} else {
address->last_send = priv->tx_head;
++priv->tx_head;
}
}
static void __ipoib_reap_ah(struct ipoib_dev_priv *priv)
{
struct ipoib_ah *ah, *tah;
LIST_HEAD(remove_list);
unsigned long flags;
spin_lock_irqsave(&priv->lock, flags);
list_for_each_entry_safe(ah, tah, &priv->dead_ahs, list)
if ((int) priv->tx_tail - (int) ah->last_send >= 0) {
list_del(&ah->list);
ib_destroy_ah(ah->ah);
kfree(ah);
}
spin_unlock_irqrestore(&priv->lock, flags);
}
void ipoib_reap_ah(struct work_struct *work)
{
struct ipoib_dev_priv *priv =
container_of(work, struct ipoib_dev_priv, ah_reap_task.work);
__ipoib_reap_ah(priv);
if (!test_bit(IPOIB_STOP_REAPER, &priv->flags))
queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task,
HZ);
}
static void ipoib_ah_dev_cleanup(struct ipoib_dev_priv *priv)
{
unsigned long begin;
begin = jiffies;
while (!list_empty(&priv->dead_ahs)) {
__ipoib_reap_ah(priv);
if (time_after(jiffies, begin + HZ)) {
ipoib_warn(priv, "timing out; will leak address handles\n");
break;
}
msleep(1);
}
}
static void ipoib_ib_tx_timer_func(unsigned long ctx)
{
drain_tx_cq((struct ipoib_dev_priv *)ctx);
}
int ipoib_ib_dev_open(struct ipoib_dev_priv *priv)
{
int ret;
if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &priv->pkey_index)) {
ipoib_warn(priv, "P_Key 0x%04x not found\n", priv->pkey);
clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
return -1;
}
set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
ret = ipoib_init_qp(priv);
if (ret) {
ipoib_warn(priv, "ipoib_init_qp returned %d\n", ret);
return -1;
}
ret = ipoib_ib_post_receives(priv);
if (ret) {
ipoib_warn(priv, "ipoib_ib_post_receives returned %d\n", ret);
ipoib_ib_dev_stop(priv, 1);
return -1;
}
ret = ipoib_cm_dev_open(priv);
if (ret) {
ipoib_warn(priv, "ipoib_cm_dev_open returned %d\n", ret);
ipoib_ib_dev_stop(priv, 1);
return -1;
}
clear_bit(IPOIB_STOP_REAPER, &priv->flags);
queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task, HZ);
return 0;
}
static void ipoib_pkey_dev_check_presence(struct ipoib_dev_priv *priv)
{
u16 pkey_index = 0;
if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &pkey_index))
clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
else
set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
}
int ipoib_ib_dev_up(struct ipoib_dev_priv *priv)
{
ipoib_pkey_dev_check_presence(priv);
if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
ipoib_dbg(priv, "PKEY is not assigned.\n");
return 0;
}
set_bit(IPOIB_FLAG_OPER_UP, &priv->flags);
return ipoib_mcast_start_thread(priv);
}
int ipoib_ib_dev_down(struct ipoib_dev_priv *priv, int flush)
{
ipoib_dbg(priv, "downing ib_dev\n");
clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags);
if_link_state_change(priv->dev, LINK_STATE_DOWN);
/* Shutdown the P_Key thread if still active */
if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
mutex_lock(&pkey_mutex);
set_bit(IPOIB_PKEY_STOP, &priv->flags);
cancel_delayed_work(&priv->pkey_poll_task);
mutex_unlock(&pkey_mutex);
if (flush)
flush_workqueue(ipoib_workqueue);
}
ipoib_mcast_stop_thread(priv, flush);
ipoib_mcast_dev_flush(priv);
ipoib_flush_paths(priv);
return 0;
}
static int recvs_pending(struct ipoib_dev_priv *priv)
{
int pending = 0;
int i;
for (i = 0; i < ipoib_recvq_size; ++i)
if (priv->rx_ring[i].mb)
++pending;
return pending;
}
void ipoib_drain_cq(struct ipoib_dev_priv *priv)
{
int i, n;
do {
n = ib_poll_cq(priv->recv_cq, IPOIB_NUM_WC, priv->ibwc);
for (i = 0; i < n; ++i) {
/*
* Convert any successful completions to flush
* errors to avoid passing packets up the
* stack after bringing the device down.
*/
if (priv->ibwc[i].status == IB_WC_SUCCESS)
priv->ibwc[i].status = IB_WC_WR_FLUSH_ERR;
if ((priv->ibwc[i].wr_id & IPOIB_OP_RECV) == 0)
panic("ipoib_drain_cq: Bad wrid 0x%jX\n",
(intmax_t)priv->ibwc[i].wr_id);
if (priv->ibwc[i].wr_id & IPOIB_OP_CM)
ipoib_cm_handle_rx_wc(priv, priv->ibwc + i);
else
ipoib_ib_handle_rx_wc(priv, priv->ibwc + i);
}
} while (n == IPOIB_NUM_WC);
spin_lock(&priv->lock);
while (ipoib_poll_tx(priv))
; /* nothing */
spin_unlock(&priv->lock);
}
int ipoib_ib_dev_stop(struct ipoib_dev_priv *priv, int flush)
{
struct ib_qp_attr qp_attr;
unsigned long begin;
struct ipoib_tx_buf *tx_req;
int i;
ipoib_cm_dev_stop(priv);
/*
* Move our QP to the error state and then reinitialize in
* when all work requests have completed or have been flushed.
*/
qp_attr.qp_state = IB_QPS_ERR;
if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
ipoib_warn(priv, "Failed to modify QP to ERROR state\n");
/* Wait for all sends and receives to complete */
begin = jiffies;
while (priv->tx_head != priv->tx_tail || recvs_pending(priv)) {
if (time_after(jiffies, begin + 5 * HZ)) {
ipoib_warn(priv, "timing out; %d sends %d receives not completed\n",
priv->tx_head - priv->tx_tail, recvs_pending(priv));
/*
* assume the HW is wedged and just free up
* all our pending work requests.
*/
while ((int) priv->tx_tail - (int) priv->tx_head < 0) {
tx_req = &priv->tx_ring[priv->tx_tail &
(ipoib_sendq_size - 1)];
ipoib_dma_unmap_tx(priv->ca, tx_req);
m_freem(tx_req->mb);
++priv->tx_tail;
--priv->tx_outstanding;
}
for (i = 0; i < ipoib_recvq_size; ++i) {
struct ipoib_rx_buf *rx_req;
rx_req = &priv->rx_ring[i];
if (!rx_req->mb)
continue;
ipoib_dma_unmap_rx(priv, &priv->rx_ring[i]);
m_freem(rx_req->mb);
rx_req->mb = NULL;
}
goto timeout;
}
ipoib_drain_cq(priv);
msleep(1);
}
ipoib_dbg(priv, "All sends and receives done.\n");
timeout:
del_timer_sync(&priv->poll_timer);
qp_attr.qp_state = IB_QPS_RESET;
if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
ipoib_warn(priv, "Failed to modify QP to RESET state\n");
/* Wait for all AHs to be reaped */
set_bit(IPOIB_STOP_REAPER, &priv->flags);
cancel_delayed_work(&priv->ah_reap_task);
if (flush)
flush_workqueue(ipoib_workqueue);
ipoib_ah_dev_cleanup(priv);
ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP);
return 0;
}
int ipoib_ib_dev_init(struct ipoib_dev_priv *priv, struct ib_device *ca, int port)
{
struct ifnet *dev = priv->dev;
priv->ca = ca;
priv->port = port;
priv->qp = NULL;
if (ipoib_transport_dev_init(priv, ca)) {
printk(KERN_WARNING "%s: ipoib_transport_dev_init failed\n", ca->name);
return -ENODEV;
}
setup_timer(&priv->poll_timer, ipoib_ib_tx_timer_func,
(unsigned long) priv);
if (dev->if_flags & IFF_UP) {
if (ipoib_ib_dev_open(priv)) {
ipoib_transport_dev_cleanup(priv);
return -ENODEV;
}
}
return 0;
}
static void __ipoib_ib_dev_flush(struct ipoib_dev_priv *priv,
enum ipoib_flush_level level)
{
struct ipoib_dev_priv *cpriv;
u16 new_index;
mutex_lock(&priv->vlan_mutex);
/*
* Flush any child interfaces too -- they might be up even if
* the parent is down.
*/
list_for_each_entry(cpriv, &priv->child_intfs, list)
__ipoib_ib_dev_flush(cpriv, level);
mutex_unlock(&priv->vlan_mutex);
if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) {
ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_INITIALIZED not set.\n");
return;
}
if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) {
ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_ADMIN_UP not set.\n");
return;
}
if (level == IPOIB_FLUSH_HEAVY) {
if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &new_index)) {
clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
ipoib_ib_dev_down(priv, 0);
ipoib_ib_dev_stop(priv, 0);
if (ipoib_pkey_dev_delay_open(priv))
return;
}
/* restart QP only if P_Key index is changed */
if (test_and_set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags) &&
new_index == priv->pkey_index) {
ipoib_dbg(priv, "Not flushing - P_Key index not changed.\n");
return;
}
priv->pkey_index = new_index;
}
if (level == IPOIB_FLUSH_LIGHT) {
ipoib_mark_paths_invalid(priv);
ipoib_mcast_dev_flush(priv);
}
if (level >= IPOIB_FLUSH_NORMAL)
ipoib_ib_dev_down(priv, 0);
if (level == IPOIB_FLUSH_HEAVY) {
ipoib_ib_dev_stop(priv, 0);
ipoib_ib_dev_open(priv);
}
/*
* The device could have been brought down between the start and when
* we get here, don't bring it back up if it's not configured up
*/
if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) {
if (level >= IPOIB_FLUSH_NORMAL)
ipoib_ib_dev_up(priv);
ipoib_mcast_restart_task(&priv->restart_task);
}
}
void ipoib_ib_dev_flush_light(struct work_struct *work)
{
struct ipoib_dev_priv *priv =
container_of(work, struct ipoib_dev_priv, flush_light);
__ipoib_ib_dev_flush(priv, IPOIB_FLUSH_LIGHT);
}
void ipoib_ib_dev_flush_normal(struct work_struct *work)
{
struct ipoib_dev_priv *priv =
container_of(work, struct ipoib_dev_priv, flush_normal);
__ipoib_ib_dev_flush(priv, IPOIB_FLUSH_NORMAL);
}
void ipoib_ib_dev_flush_heavy(struct work_struct *work)
{
struct ipoib_dev_priv *priv =
container_of(work, struct ipoib_dev_priv, flush_heavy);
__ipoib_ib_dev_flush(priv, IPOIB_FLUSH_HEAVY);
}
void ipoib_ib_dev_cleanup(struct ipoib_dev_priv *priv)
{
ipoib_dbg(priv, "cleaning up ib_dev\n");
ipoib_mcast_stop_thread(priv, 1);
ipoib_mcast_dev_flush(priv);
ipoib_ah_dev_cleanup(priv);
ipoib_transport_dev_cleanup(priv);
}
/*
* Delayed P_Key Assigment Interim Support
*
* The following is initial implementation of delayed P_Key assigment
* mechanism. It is using the same approach implemented for the multicast
* group join. The single goal of this implementation is to quickly address
* Bug #2507. This implementation will probably be removed when the P_Key
* change async notification is available.
*/
void ipoib_pkey_poll(struct work_struct *work)
{
struct ipoib_dev_priv *priv =
container_of(work, struct ipoib_dev_priv, pkey_poll_task.work);
ipoib_pkey_dev_check_presence(priv);
if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags))
ipoib_open(priv);
else {
mutex_lock(&pkey_mutex);
if (!test_bit(IPOIB_PKEY_STOP, &priv->flags))
queue_delayed_work(ipoib_workqueue,
&priv->pkey_poll_task,
HZ);
mutex_unlock(&pkey_mutex);
}
}
int ipoib_pkey_dev_delay_open(struct ipoib_dev_priv *priv)
{
/* Look for the interface pkey value in the IB Port P_Key table and */
/* set the interface pkey assigment flag */
ipoib_pkey_dev_check_presence(priv);
/* P_Key value not assigned yet - start polling */
if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
mutex_lock(&pkey_mutex);
clear_bit(IPOIB_PKEY_STOP, &priv->flags);
queue_delayed_work(ipoib_workqueue,
&priv->pkey_poll_task,
HZ);
mutex_unlock(&pkey_mutex);
return 1;
}
return 0;
}