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path: root/drivers/infiniband/ulp/ipoib/ipoib_cm.c
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Diffstat (limited to 'drivers/infiniband/ulp/ipoib/ipoib_cm.c')
-rw-r--r--drivers/infiniband/ulp/ipoib/ipoib_cm.c104
1 files changed, 78 insertions, 26 deletions
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_cm.c b/drivers/infiniband/ulp/ipoib/ipoib_cm.c
index 97e67d36378..0f2d3045061 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_cm.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_cm.c
@@ -28,8 +28,6 @@
* 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.
- *
- * $Id$
*/
#include <rdma/ib_cm.h>
@@ -113,18 +111,20 @@ static int ipoib_cm_post_receive_srq(struct net_device *dev, int id)
}
static int ipoib_cm_post_receive_nonsrq(struct net_device *dev,
- struct ipoib_cm_rx *rx, int id)
+ struct ipoib_cm_rx *rx,
+ struct ib_recv_wr *wr,
+ struct ib_sge *sge, int id)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
struct ib_recv_wr *bad_wr;
int i, ret;
- priv->cm.rx_wr.wr_id = id | IPOIB_OP_CM | IPOIB_OP_RECV;
+ wr->wr_id = id | IPOIB_OP_CM | IPOIB_OP_RECV;
for (i = 0; i < IPOIB_CM_RX_SG; ++i)
- priv->cm.rx_sge[i].addr = rx->rx_ring[id].mapping[i];
+ sge[i].addr = rx->rx_ring[id].mapping[i];
- ret = ib_post_recv(rx->qp, &priv->cm.rx_wr, &bad_wr);
+ ret = ib_post_recv(rx->qp, wr, &bad_wr);
if (unlikely(ret)) {
ipoib_warn(priv, "post recv failed for buf %d (%d)\n", id, ret);
ipoib_cm_dma_unmap_rx(priv, IPOIB_CM_RX_SG - 1,
@@ -322,10 +322,33 @@ static int ipoib_cm_modify_rx_qp(struct net_device *dev,
return 0;
}
+static void ipoib_cm_init_rx_wr(struct net_device *dev,
+ struct ib_recv_wr *wr,
+ struct ib_sge *sge)
+{
+ struct ipoib_dev_priv *priv = netdev_priv(dev);
+ int i;
+
+ for (i = 0; i < priv->cm.num_frags; ++i)
+ sge[i].lkey = priv->mr->lkey;
+
+ sge[0].length = IPOIB_CM_HEAD_SIZE;
+ for (i = 1; i < priv->cm.num_frags; ++i)
+ sge[i].length = PAGE_SIZE;
+
+ wr->next = NULL;
+ wr->sg_list = priv->cm.rx_sge;
+ wr->num_sge = priv->cm.num_frags;
+}
+
static int ipoib_cm_nonsrq_init_rx(struct net_device *dev, struct ib_cm_id *cm_id,
struct ipoib_cm_rx *rx)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
+ struct {
+ struct ib_recv_wr wr;
+ struct ib_sge sge[IPOIB_CM_RX_SG];
+ } *t;
int ret;
int i;
@@ -333,6 +356,14 @@ static int ipoib_cm_nonsrq_init_rx(struct net_device *dev, struct ib_cm_id *cm_i
if (!rx->rx_ring)
return -ENOMEM;
+ t = kmalloc(sizeof *t, GFP_KERNEL);
+ if (!t) {
+ ret = -ENOMEM;
+ goto err_free;
+ }
+
+ ipoib_cm_init_rx_wr(dev, &t->wr, t->sge);
+
spin_lock_irq(&priv->lock);
if (priv->cm.nonsrq_conn_qp >= ipoib_max_conn_qp) {
@@ -351,8 +382,8 @@ static int ipoib_cm_nonsrq_init_rx(struct net_device *dev, struct ib_cm_id *cm_i
ipoib_warn(priv, "failed to allocate receive buffer %d\n", i);
ret = -ENOMEM;
goto err_count;
- }
- ret = ipoib_cm_post_receive_nonsrq(dev, rx, i);
+ }
+ ret = ipoib_cm_post_receive_nonsrq(dev, rx, &t->wr, t->sge, i);
if (ret) {
ipoib_warn(priv, "ipoib_cm_post_receive_nonsrq "
"failed for buf %d\n", i);
@@ -363,6 +394,8 @@ static int ipoib_cm_nonsrq_init_rx(struct net_device *dev, struct ib_cm_id *cm_i
rx->recv_count = ipoib_recvq_size;
+ kfree(t);
+
return 0;
err_count:
@@ -371,6 +404,7 @@ err_count:
spin_unlock_irq(&priv->lock);
err_free:
+ kfree(t);
ipoib_cm_free_rx_ring(dev, rx->rx_ring);
return ret;
@@ -525,6 +559,7 @@ void ipoib_cm_handle_rx_wc(struct net_device *dev, struct ib_wc *wc)
u64 mapping[IPOIB_CM_RX_SG];
int frags;
int has_srq;
+ struct sk_buff *small_skb;
ipoib_dbg_data(priv, "cm recv completion: id %d, status: %d\n",
wr_id, wc->status);
@@ -579,6 +614,23 @@ void ipoib_cm_handle_rx_wc(struct net_device *dev, struct ib_wc *wc)
}
}
+ if (wc->byte_len < IPOIB_CM_COPYBREAK) {
+ int dlen = wc->byte_len;
+
+ small_skb = dev_alloc_skb(dlen + 12);
+ if (small_skb) {
+ skb_reserve(small_skb, 12);
+ ib_dma_sync_single_for_cpu(priv->ca, rx_ring[wr_id].mapping[0],
+ dlen, DMA_FROM_DEVICE);
+ skb_copy_from_linear_data(skb, small_skb->data, dlen);
+ ib_dma_sync_single_for_device(priv->ca, rx_ring[wr_id].mapping[0],
+ dlen, DMA_FROM_DEVICE);
+ skb_put(small_skb, dlen);
+ skb = small_skb;
+ goto copied;
+ }
+ }
+
frags = PAGE_ALIGN(wc->byte_len - min(wc->byte_len,
(unsigned)IPOIB_CM_HEAD_SIZE)) / PAGE_SIZE;
@@ -601,6 +653,7 @@ void ipoib_cm_handle_rx_wc(struct net_device *dev, struct ib_wc *wc)
skb_put_frags(skb, IPOIB_CM_HEAD_SIZE, wc->byte_len, newskb);
+copied:
skb->protocol = ((struct ipoib_header *) skb->data)->proto;
skb_reset_mac_header(skb);
skb_pull(skb, IPOIB_ENCAP_LEN);
@@ -620,7 +673,10 @@ repost:
ipoib_warn(priv, "ipoib_cm_post_receive_srq failed "
"for buf %d\n", wr_id);
} else {
- if (unlikely(ipoib_cm_post_receive_nonsrq(dev, p, wr_id))) {
+ if (unlikely(ipoib_cm_post_receive_nonsrq(dev, p,
+ &priv->cm.rx_wr,
+ priv->cm.rx_sge,
+ wr_id))) {
--p->recv_count;
ipoib_warn(priv, "ipoib_cm_post_receive_nonsrq failed "
"for buf %d\n", wr_id);
@@ -647,7 +703,7 @@ static inline int post_send(struct ipoib_dev_priv *priv,
void ipoib_cm_send(struct net_device *dev, struct sk_buff *skb, struct ipoib_cm_tx *tx)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
- struct ipoib_tx_buf *tx_req;
+ struct ipoib_cm_tx_buf *tx_req;
u64 addr;
if (unlikely(skb->len > tx->mtu)) {
@@ -678,7 +734,7 @@ void ipoib_cm_send(struct net_device *dev, struct sk_buff *skb, struct ipoib_cm_
return;
}
- tx_req->mapping[0] = addr;
+ tx_req->mapping = addr;
if (unlikely(post_send(priv, tx, tx->tx_head & (ipoib_sendq_size - 1),
addr, skb->len))) {
@@ -703,7 +759,7 @@ void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ib_wc *wc)
struct ipoib_dev_priv *priv = netdev_priv(dev);
struct ipoib_cm_tx *tx = wc->qp->qp_context;
unsigned int wr_id = wc->wr_id & ~IPOIB_OP_CM;
- struct ipoib_tx_buf *tx_req;
+ struct ipoib_cm_tx_buf *tx_req;
unsigned long flags;
ipoib_dbg_data(priv, "cm send completion: id %d, status: %d\n",
@@ -717,7 +773,7 @@ void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ib_wc *wc)
tx_req = &tx->tx_ring[wr_id];
- ib_dma_unmap_single(priv->ca, tx_req->mapping[0], tx_req->skb->len, DMA_TO_DEVICE);
+ ib_dma_unmap_single(priv->ca, tx_req->mapping, tx_req->skb->len, DMA_TO_DEVICE);
/* FIXME: is this right? Shouldn't we only increment on success? */
++dev->stats.tx_packets;
@@ -1087,7 +1143,7 @@ err_tx:
static void ipoib_cm_tx_destroy(struct ipoib_cm_tx *p)
{
struct ipoib_dev_priv *priv = netdev_priv(p->dev);
- struct ipoib_tx_buf *tx_req;
+ struct ipoib_cm_tx_buf *tx_req;
unsigned long flags;
unsigned long begin;
@@ -1115,7 +1171,7 @@ timeout:
while ((int) p->tx_tail - (int) p->tx_head < 0) {
tx_req = &p->tx_ring[p->tx_tail & (ipoib_sendq_size - 1)];
- ib_dma_unmap_single(priv->ca, tx_req->mapping[0], tx_req->skb->len,
+ ib_dma_unmap_single(priv->ca, tx_req->mapping, tx_req->skb->len,
DMA_TO_DEVICE);
dev_kfree_skb_any(tx_req->skb);
++p->tx_tail;
@@ -1384,7 +1440,9 @@ static ssize_t set_mode(struct device *d, struct device_attribute *attr,
ipoib_warn(priv, "enabling connected mode "
"will cause multicast packet drops\n");
+ rtnl_lock();
dev->features &= ~(NETIF_F_IP_CSUM | NETIF_F_SG | NETIF_F_TSO);
+ rtnl_unlock();
priv->tx_wr.send_flags &= ~IB_SEND_IP_CSUM;
ipoib_flush_paths(dev);
@@ -1393,14 +1451,16 @@ static ssize_t set_mode(struct device *d, struct device_attribute *attr,
if (!strcmp(buf, "datagram\n")) {
clear_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
- dev->mtu = min(priv->mcast_mtu, dev->mtu);
- ipoib_flush_paths(dev);
+ rtnl_lock();
if (test_bit(IPOIB_FLAG_CSUM, &priv->flags)) {
dev->features |= NETIF_F_IP_CSUM | NETIF_F_SG;
if (priv->hca_caps & IB_DEVICE_UD_TSO)
dev->features |= NETIF_F_TSO;
}
+ dev_set_mtu(dev, min(priv->mcast_mtu, dev->mtu));
+ rtnl_unlock();
+ ipoib_flush_paths(dev);
return count;
}
@@ -1485,15 +1545,7 @@ int ipoib_cm_dev_init(struct net_device *dev)
priv->cm.num_frags = IPOIB_CM_RX_SG;
}
- for (i = 0; i < priv->cm.num_frags; ++i)
- priv->cm.rx_sge[i].lkey = priv->mr->lkey;
-
- priv->cm.rx_sge[0].length = IPOIB_CM_HEAD_SIZE;
- for (i = 1; i < priv->cm.num_frags; ++i)
- priv->cm.rx_sge[i].length = PAGE_SIZE;
- priv->cm.rx_wr.next = NULL;
- priv->cm.rx_wr.sg_list = priv->cm.rx_sge;
- priv->cm.rx_wr.num_sge = priv->cm.num_frags;
+ ipoib_cm_init_rx_wr(dev, &priv->cm.rx_wr, priv->cm.rx_sge);
if (ipoib_cm_has_srq(dev)) {
for (i = 0; i < ipoib_recvq_size; ++i) {
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-11-23 00:11:32 +0000