/*
* 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
#include <linux/delay.h>
#include <linux/dma-mapping.h>
-#include <ib_cache.h>
+#include <rdma/ib_cache.h>
#include "ipoib.h"
#define IPOIB_OP_RECV (1ul << 31)
-static DECLARE_MUTEX(pkey_sem);
+static DEFINE_MUTEX(pkey_mutex);
struct ipoib_ah *ipoib_create_ah(struct net_device *dev,
struct ib_pd *pd, struct ib_ah_attr *attr)
unsigned long flags;
- if (ah->last_send <= priv->tx_tail) {
+ if ((int) priv->tx_tail - (int) ah->last_send >= 0) {
ipoib_dbg(priv, "Freeing ah %p\n", ah->ah);
ib_destroy_ah(ah->ah);
kfree(ah);
}
}
-static inline int ipoib_ib_receive(struct ipoib_dev_priv *priv,
- unsigned int wr_id,
- dma_addr_t addr)
+static int ipoib_ib_post_receive(struct net_device *dev, int id)
{
- struct ib_sge list = {
- .addr = addr,
- .length = IPOIB_BUF_SIZE,
- .lkey = priv->mr->lkey,
- };
- struct ib_recv_wr param = {
- .wr_id = wr_id | IPOIB_OP_RECV,
- .sg_list = &list,
- .num_sge = 1,
- };
+ struct ipoib_dev_priv *priv = netdev_priv(dev);
+ struct ib_sge list;
+ struct ib_recv_wr param;
struct ib_recv_wr *bad_wr;
+ int ret;
+
+ list.addr = priv->rx_ring[id].mapping;
+ list.length = IPOIB_BUF_SIZE;
+ list.lkey = priv->mr->lkey;
+
+ param.next = NULL;
+ param.wr_id = id | IPOIB_OP_RECV;
+ param.sg_list = &list;
+ param.num_sge = 1;
+
+ ret = ib_post_recv(priv->qp, ¶m, &bad_wr);
+ if (unlikely(ret)) {
+ ipoib_warn(priv, "receive failed for buf %d (%d)\n", id, ret);
+ dma_unmap_single(priv->ca->dma_device,
+ priv->rx_ring[id].mapping,
+ IPOIB_BUF_SIZE, DMA_FROM_DEVICE);
+ dev_kfree_skb_any(priv->rx_ring[id].skb);
+ priv->rx_ring[id].skb = NULL;
+ }
- return ib_post_recv(priv->qp, ¶m, &bad_wr);
+ return ret;
}
-static int ipoib_ib_post_receive(struct net_device *dev, int id)
+static int ipoib_alloc_rx_skb(struct net_device *dev, int id)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
struct sk_buff *skb;
dma_addr_t addr;
- int ret;
skb = dev_alloc_skb(IPOIB_BUF_SIZE + 4);
- if (!skb) {
- ipoib_warn(priv, "failed to allocate receive buffer\n");
-
- priv->rx_ring[id].skb = NULL;
+ if (!skb)
return -ENOMEM;
- }
- skb_reserve(skb, 4); /* 16 byte align IP header */
- priv->rx_ring[id].skb = skb;
+
+ /*
+ * IB will leave a 40 byte gap for a GRH and IPoIB adds a 4 byte
+ * header. So we need 4 more bytes to get to 48 and align the
+ * IP header to a multiple of 16.
+ */
+ skb_reserve(skb, 4);
+
addr = dma_map_single(priv->ca->dma_device,
skb->data, IPOIB_BUF_SIZE,
DMA_FROM_DEVICE);
- pci_unmap_addr_set(&priv->rx_ring[id], mapping, addr);
-
- ret = ipoib_ib_receive(priv, id, addr);
- if (ret) {
- ipoib_warn(priv, "ipoib_ib_receive failed for buf %d (%d)\n",
- id, ret);
- dma_unmap_single(priv->ca->dma_device, addr,
- IPOIB_BUF_SIZE, DMA_FROM_DEVICE);
+ if (unlikely(dma_mapping_error(addr))) {
dev_kfree_skb_any(skb);
- priv->rx_ring[id].skb = NULL;
+ return -EIO;
}
- return ret;
+ priv->rx_ring[id].skb = skb;
+ priv->rx_ring[id].mapping = addr;
+
+ return 0;
}
static int ipoib_ib_post_receives(struct net_device *dev)
struct ipoib_dev_priv *priv = netdev_priv(dev);
int i;
- for (i = 0; i < IPOIB_RX_RING_SIZE; ++i) {
+ for (i = 0; i < ipoib_recvq_size; ++i) {
+ if (ipoib_alloc_rx_skb(dev, i)) {
+ ipoib_warn(priv, "failed to allocate receive buffer %d\n", i);
+ return -ENOMEM;
+ }
if (ipoib_ib_post_receive(dev, i)) {
ipoib_warn(priv, "ipoib_ib_post_receive failed for buf %d\n", i);
return -EIO;
if (wr_id & IPOIB_OP_RECV) {
wr_id &= ~IPOIB_OP_RECV;
- if (wr_id < IPOIB_RX_RING_SIZE) {
- struct sk_buff *skb = priv->rx_ring[wr_id].skb;
-
- priv->rx_ring[wr_id].skb = NULL;
-
- dma_unmap_single(priv->ca->dma_device,
- pci_unmap_addr(&priv->rx_ring[wr_id],
- mapping),
- IPOIB_BUF_SIZE,
- DMA_FROM_DEVICE);
+ if (wr_id < ipoib_recvq_size) {
+ struct sk_buff *skb = priv->rx_ring[wr_id].skb;
+ dma_addr_t addr = priv->rx_ring[wr_id].mapping;
- if (wc->status != IB_WC_SUCCESS) {
+ 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);
+ dma_unmap_single(priv->ca->dma_device, addr,
+ IPOIB_BUF_SIZE, DMA_FROM_DEVICE);
dev_kfree_skb_any(skb);
+ priv->rx_ring[wr_id].skb = NULL;
return;
}
+ /*
+ * If we can't allocate a new RX buffer, dump
+ * this packet and reuse the old buffer.
+ */
+ if (unlikely(ipoib_alloc_rx_skb(dev, wr_id))) {
+ ++priv->stats.rx_dropped;
+ goto repost;
+ }
+
ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n",
wc->byte_len, wc->slid);
+ dma_unmap_single(priv->ca->dma_device, addr,
+ IPOIB_BUF_SIZE, DMA_FROM_DEVICE);
+
skb_put(skb, wc->byte_len);
skb_pull(skb, IB_GRH_BYTES);
dev_kfree_skb_any(skb);
}
- /* repost receive */
- if (ipoib_ib_post_receive(dev, wr_id))
+ repost:
+ if (unlikely(ipoib_ib_post_receive(dev, wr_id)))
ipoib_warn(priv, "ipoib_ib_post_receive failed "
"for buf %d\n", wr_id);
} else
wr_id);
} else {
- struct ipoib_buf *tx_req;
+ struct ipoib_tx_buf *tx_req;
unsigned long flags;
- if (wr_id >= IPOIB_TX_RING_SIZE) {
+ if (wr_id >= ipoib_sendq_size) {
ipoib_warn(priv, "completion event with wrid %d (> %d)\n",
- wr_id, IPOIB_TX_RING_SIZE);
+ wr_id, ipoib_sendq_size);
return;
}
spin_lock_irqsave(&priv->tx_lock, flags);
++priv->tx_tail;
if (netif_queue_stopped(dev) &&
- priv->tx_head - priv->tx_tail <= IPOIB_TX_RING_SIZE / 2)
+ test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags) &&
+ priv->tx_head - priv->tx_tail <= ipoib_sendq_size >> 1)
netif_wake_queue(dev);
spin_unlock_irqrestore(&priv->tx_lock, flags);
struct ipoib_ah *address, u32 qpn)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
- struct ipoib_buf *tx_req;
+ struct ipoib_tx_buf *tx_req;
dma_addr_t addr;
if (skb->len > dev->mtu + INFINIBAND_ALEN) {
* 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_TX_RING_SIZE - 1)];
+ tx_req = &priv->tx_ring[priv->tx_head & (ipoib_sendq_size - 1)];
tx_req->skb = skb;
addr = dma_map_single(priv->ca->dma_device, skb->data, skb->len,
DMA_TO_DEVICE);
pci_unmap_addr_set(tx_req, mapping, addr);
- if (unlikely(post_send(priv, priv->tx_head & (IPOIB_TX_RING_SIZE - 1),
+ if (unlikely(post_send(priv, priv->tx_head & (ipoib_sendq_size - 1),
address->ah, qpn, addr, skb->len))) {
ipoib_warn(priv, "post_send failed\n");
++priv->stats.tx_errors;
address->last_send = priv->tx_head;
++priv->tx_head;
- if (priv->tx_head - priv->tx_tail == IPOIB_TX_RING_SIZE) {
+ if (priv->tx_head - priv->tx_tail == ipoib_sendq_size) {
ipoib_dbg(priv, "TX ring full, stopping kernel net queue\n");
netif_stop_queue(dev);
}
spin_lock_irq(&priv->lock);
list_for_each_entry_safe(ah, tah, &priv->dead_ahs, list)
- if (ah->last_send <= priv->tx_tail) {
+ if ((int) priv->tx_tail - (int) ah->last_send >= 0) {
list_del(&ah->list);
list_add_tail(&ah->list, &remove_list);
}
struct ipoib_dev_priv *priv = netdev_priv(dev);
int ret;
- ret = ipoib_qp_create(dev);
+ ret = ipoib_init_qp(dev);
if (ret) {
- ipoib_warn(priv, "ipoib_qp_create returned %d\n", ret);
+ ipoib_warn(priv, "ipoib_init_qp returned %d\n", ret);
return -1;
}
ret = ipoib_ib_post_receives(dev);
if (ret) {
ipoib_warn(priv, "ipoib_ib_post_receives returned %d\n", ret);
+ ipoib_ib_dev_stop(dev);
return -1;
}
clear_bit(IPOIB_STOP_REAPER, &priv->flags);
queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task, HZ);
+ set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags);
+
return 0;
}
+static void ipoib_pkey_dev_check_presence(struct net_device *dev)
+{
+ struct ipoib_dev_priv *priv = netdev_priv(dev);
+ u16 pkey_index = 0;
+
+ if (ib_find_cached_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 net_device *dev)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
+ ipoib_pkey_dev_check_presence(dev);
+
+ 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(dev);
}
-int ipoib_ib_dev_down(struct net_device *dev)
+int ipoib_ib_dev_down(struct net_device *dev, int flush)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
/* Shutdown the P_Key thread if still active */
if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
- down(&pkey_sem);
+ mutex_lock(&pkey_mutex);
set_bit(IPOIB_PKEY_STOP, &priv->flags);
cancel_delayed_work(&priv->pkey_task);
- up(&pkey_sem);
- flush_workqueue(ipoib_workqueue);
+ mutex_unlock(&pkey_mutex);
+ if (flush)
+ flush_workqueue(ipoib_workqueue);
}
- ipoib_mcast_stop_thread(dev);
-
- /*
- * Flush the multicast groups first so we stop any multicast joins. The
- * completion thread may have already died and we may deadlock waiting
- * for the completion thread to finish some multicast joins.
- */
+ ipoib_mcast_stop_thread(dev, flush);
ipoib_mcast_dev_flush(dev);
- /* Delete broadcast and local addresses since they will be recreated */
- ipoib_mcast_dev_down(dev);
-
ipoib_flush_paths(dev);
return 0;
int pending = 0;
int i;
- for (i = 0; i < IPOIB_RX_RING_SIZE; ++i)
+ for (i = 0; i < ipoib_recvq_size; ++i)
if (priv->rx_ring[i].skb)
++pending;
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
struct ib_qp_attr qp_attr;
- int attr_mask;
unsigned long begin;
- struct ipoib_buf *tx_req;
+ struct ipoib_tx_buf *tx_req;
int i;
- /* Kill the existing QP and allocate a new one */
+ clear_bit(IPOIB_FLAG_INITIALIZED, &priv->flags);
+
+ /*
+ * 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;
- attr_mask = IB_QP_STATE;
- if (ib_modify_qp(priv->qp, &qp_attr, attr_mask))
+ 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 */
* assume the HW is wedged and just free up
* all our pending work requests.
*/
- while (priv->tx_tail < priv->tx_head) {
+ while ((int) priv->tx_tail - (int) priv->tx_head < 0) {
tx_req = &priv->tx_ring[priv->tx_tail &
- (IPOIB_TX_RING_SIZE - 1)];
+ (ipoib_sendq_size - 1)];
dma_unmap_single(priv->ca->dma_device,
pci_unmap_addr(tx_req, mapping),
tx_req->skb->len,
++priv->tx_tail;
}
- for (i = 0; i < IPOIB_RX_RING_SIZE; ++i)
+ for (i = 0; i < ipoib_recvq_size; ++i)
if (priv->rx_ring[i].skb) {
dma_unmap_single(priv->ca->dma_device,
pci_unmap_addr(&priv->rx_ring[i],
timeout:
qp_attr.qp_state = IB_QPS_RESET;
- attr_mask = IB_QP_STATE;
- if (ib_modify_qp(priv->qp, &qp_attr, attr_mask))
+ 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 */
struct net_device *dev = (struct net_device *)_dev;
struct ipoib_dev_priv *priv = netdev_priv(dev), *cpriv;
- if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags))
+ 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;
+ }
ipoib_dbg(priv, "flushing\n");
- ipoib_ib_dev_down(dev);
+ ipoib_ib_dev_down(dev, 0);
/*
* The device could have been brought down between the start and when
if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags))
ipoib_ib_dev_up(dev);
+ mutex_lock(&priv->vlan_mutex);
+
/* Flush any child interfaces too */
list_for_each_entry(cpriv, &priv->child_intfs, list)
- ipoib_ib_dev_flush(&cpriv->dev);
+ ipoib_ib_dev_flush(cpriv->dev);
+
+ mutex_unlock(&priv->vlan_mutex);
}
void ipoib_ib_dev_cleanup(struct net_device *dev)
ipoib_dbg(priv, "cleaning up ib_dev\n");
- ipoib_mcast_stop_thread(dev);
-
- /* Delete the broadcast address and the local address */
- ipoib_mcast_dev_down(dev);
+ ipoib_mcast_stop_thread(dev, 1);
+ ipoib_mcast_dev_flush(dev);
ipoib_transport_dev_cleanup(dev);
}
* Bug #2507. This implementation will probably be removed when the P_Key
* change async notification is available.
*/
-int ipoib_open(struct net_device *dev);
-
-static void ipoib_pkey_dev_check_presence(struct net_device *dev)
-{
- struct ipoib_dev_priv *priv = netdev_priv(dev);
- u16 pkey_index = 0;
-
- if (ib_find_cached_pkey(priv->ca, priv->port, priv->pkey, &pkey_index))
- clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
- else
- set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
-}
void ipoib_pkey_poll(void *dev_ptr)
{
if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags))
ipoib_open(dev);
else {
- down(&pkey_sem);
+ mutex_lock(&pkey_mutex);
if (!test_bit(IPOIB_PKEY_STOP, &priv->flags))
queue_delayed_work(ipoib_workqueue,
&priv->pkey_task,
HZ);
- up(&pkey_sem);
+ mutex_unlock(&pkey_mutex);
}
}
/* P_Key value not assigned yet - start polling */
if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
- down(&pkey_sem);
+ mutex_lock(&pkey_mutex);
clear_bit(IPOIB_PKEY_STOP, &priv->flags);
queue_delayed_work(ipoib_workqueue,
&priv->pkey_task,
HZ);
- up(&pkey_sem);
+ mutex_unlock(&pkey_mutex);
return 1;
}
git://git.onelab.eu / linux-2.6.git / blobdiff