#include <linux/dma-mapping.h>
#include <rdma/ib_cache.h>
+#include <linux/ip.h>
+#include <linux/tcp.h>
#include "ipoib.h"
spin_unlock_irqrestore(&priv->lock, flags);
}
+static void ipoib_ud_dma_unmap_rx(struct ipoib_dev_priv *priv,
+ u64 mapping[IPOIB_UD_RX_SG])
+{
+ if (ipoib_ud_need_sg(priv->max_ib_mtu)) {
+ ib_dma_unmap_single(priv->ca, mapping[0], IPOIB_UD_HEAD_SIZE,
+ DMA_FROM_DEVICE);
+ ib_dma_unmap_page(priv->ca, mapping[1], PAGE_SIZE,
+ DMA_FROM_DEVICE);
+ } else
+ ib_dma_unmap_single(priv->ca, mapping[0],
+ IPOIB_UD_BUF_SIZE(priv->max_ib_mtu),
+ DMA_FROM_DEVICE);
+}
+
+static void ipoib_ud_skb_put_frags(struct ipoib_dev_priv *priv,
+ struct sk_buff *skb,
+ unsigned int length)
+{
+ if (ipoib_ud_need_sg(priv->max_ib_mtu)) {
+ skb_frag_t *frag = &skb_shinfo(skb)->frags[0];
+ unsigned int size;
+ /*
+ * There is only two buffers needed for max_payload = 4K,
+ * first buf size is IPOIB_UD_HEAD_SIZE
+ */
+ skb->tail += IPOIB_UD_HEAD_SIZE;
+ skb->len += length;
+
+ size = length - IPOIB_UD_HEAD_SIZE;
+
+ frag->size = size;
+ skb->data_len += size;
+ skb->truesize += size;
+ } else
+ skb_put(skb, length);
+
+}
+
static int ipoib_ib_post_receive(struct net_device *dev, int id)
{
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;
+ priv->rx_wr.wr_id = id | IPOIB_OP_RECV;
+ priv->rx_sge[0].addr = priv->rx_ring[id].mapping[0];
+ priv->rx_sge[1].addr = priv->rx_ring[id].mapping[1];
- 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);
+ 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);
- ib_dma_unmap_single(priv->ca, priv->rx_ring[id].mapping,
- IPOIB_BUF_SIZE, DMA_FROM_DEVICE);
+ ipoib_ud_dma_unmap_rx(priv, priv->rx_ring[id].mapping);
dev_kfree_skb_any(priv->rx_ring[id].skb);
priv->rx_ring[id].skb = NULL;
}
return ret;
}
-static int ipoib_alloc_rx_skb(struct net_device *dev, int id)
+static struct sk_buff *ipoib_alloc_rx_skb(struct net_device *dev, int id)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
struct sk_buff *skb;
- u64 addr;
+ int buf_size;
+ u64 *mapping;
+
+ if (ipoib_ud_need_sg(priv->max_ib_mtu))
+ buf_size = IPOIB_UD_HEAD_SIZE;
+ else
+ buf_size = IPOIB_UD_BUF_SIZE(priv->max_ib_mtu);
- skb = dev_alloc_skb(IPOIB_BUF_SIZE + 4);
- if (!skb)
- return -ENOMEM;
+ skb = dev_alloc_skb(buf_size + 4);
+ if (unlikely(!skb))
+ return NULL;
/*
* IB will leave a 40 byte gap for a GRH and IPoIB adds a 4 byte
*/
skb_reserve(skb, 4);
- addr = ib_dma_map_single(priv->ca, skb->data, IPOIB_BUF_SIZE,
- DMA_FROM_DEVICE);
- if (unlikely(ib_dma_mapping_error(priv->ca, addr))) {
- dev_kfree_skb_any(skb);
- return -EIO;
+ mapping = priv->rx_ring[id].mapping;
+ mapping[0] = ib_dma_map_single(priv->ca, skb->data, buf_size,
+ DMA_FROM_DEVICE);
+ if (unlikely(ib_dma_mapping_error(priv->ca, mapping[0])))
+ goto error;
+
+ if (ipoib_ud_need_sg(priv->max_ib_mtu)) {
+ struct page *page = alloc_page(GFP_ATOMIC);
+ if (!page)
+ goto partial_error;
+ skb_fill_page_desc(skb, 0, page, 0, PAGE_SIZE);
+ mapping[1] =
+ ib_dma_map_page(priv->ca, skb_shinfo(skb)->frags[0].page,
+ 0, PAGE_SIZE, DMA_FROM_DEVICE);
+ if (unlikely(ib_dma_mapping_error(priv->ca, mapping[1])))
+ goto partial_error;
}
- priv->rx_ring[id].skb = skb;
- priv->rx_ring[id].mapping = addr;
+ priv->rx_ring[id].skb = skb;
+ return skb;
- return 0;
+partial_error:
+ ib_dma_unmap_single(priv->ca, mapping[0], buf_size, DMA_FROM_DEVICE);
+error:
+ dev_kfree_skb_any(skb);
+ return NULL;
}
static int ipoib_ib_post_receives(struct net_device *dev)
int i;
for (i = 0; i < ipoib_recvq_size; ++i) {
- if (ipoib_alloc_rx_skb(dev, i)) {
+ if (!ipoib_alloc_rx_skb(dev, i)) {
ipoib_warn(priv, "failed to allocate receive buffer %d\n", i);
return -ENOMEM;
}
struct ipoib_dev_priv *priv = netdev_priv(dev);
unsigned int wr_id = wc->wr_id & ~IPOIB_OP_RECV;
struct sk_buff *skb;
- u64 addr;
+ u64 mapping[IPOIB_UD_RX_SG];
ipoib_dbg_data(priv, "recv completion: id %d, status: %d\n",
wr_id, wc->status);
}
skb = priv->rx_ring[wr_id].skb;
- addr = priv->rx_ring[wr_id].mapping;
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);
- ib_dma_unmap_single(priv->ca, addr,
- IPOIB_BUF_SIZE, DMA_FROM_DEVICE);
+ ipoib_ud_dma_unmap_rx(priv, priv->rx_ring[wr_id].mapping);
dev_kfree_skb_any(skb);
priv->rx_ring[wr_id].skb = NULL;
return;
if (wc->slid == priv->local_lid && wc->src_qp == priv->qp->qp_num)
goto repost;
+ memcpy(mapping, priv->rx_ring[wr_id].mapping,
+ IPOIB_UD_RX_SG * sizeof *mapping);
+
/*
* 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))) {
+ if (unlikely(!ipoib_alloc_rx_skb(dev, wr_id))) {
++dev->stats.rx_dropped;
goto repost;
}
ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n",
wc->byte_len, wc->slid);
- ib_dma_unmap_single(priv->ca, addr, IPOIB_BUF_SIZE, DMA_FROM_DEVICE);
+ ipoib_ud_dma_unmap_rx(priv, mapping);
+ ipoib_ud_skb_put_frags(priv, skb, wc->byte_len);
- skb_put(skb, wc->byte_len);
skb_pull(skb, IB_GRH_BYTES);
skb->protocol = ((struct ipoib_header *) skb->data)->proto;
skb->dev = dev;
/* XXX get correct PACKET_ type here */
skb->pkt_type = PACKET_HOST;
+
+ if (test_bit(IPOIB_FLAG_CSUM, &priv->flags) && likely(wc->csum_ok))
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+
netif_receive_skb(skb);
repost:
"for buf %d\n", wr_id);
}
+static int ipoib_dma_map_tx(struct ib_device *ca,
+ struct ipoib_tx_buf *tx_req)
+{
+ struct sk_buff *skb = tx_req->skb;
+ u64 *mapping = tx_req->mapping;
+ int i;
+ int off;
+
+ if (skb_headlen(skb)) {
+ mapping[0] = ib_dma_map_single(ca, skb->data, skb_headlen(skb),
+ DMA_TO_DEVICE);
+ if (unlikely(ib_dma_mapping_error(ca, mapping[0])))
+ return -EIO;
+
+ off = 1;
+ } else
+ off = 0;
+
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i) {
+ skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
+ mapping[i + off] = ib_dma_map_page(ca, frag->page,
+ frag->page_offset, frag->size,
+ DMA_TO_DEVICE);
+ if (unlikely(ib_dma_mapping_error(ca, mapping[i + off])))
+ goto partial_error;
+ }
+ return 0;
+
+partial_error:
+ for (; i > 0; --i) {
+ skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1];
+ ib_dma_unmap_page(ca, mapping[i - !off], frag->size, DMA_TO_DEVICE);
+ }
+
+ if (off)
+ ib_dma_unmap_single(ca, mapping[0], skb_headlen(skb), DMA_TO_DEVICE);
+
+ return -EIO;
+}
+
+static void ipoib_dma_unmap_tx(struct ib_device *ca,
+ struct ipoib_tx_buf *tx_req)
+{
+ struct sk_buff *skb = tx_req->skb;
+ u64 *mapping = tx_req->mapping;
+ int i;
+ int off;
+
+ if (skb_headlen(skb)) {
+ ib_dma_unmap_single(ca, mapping[0], skb_headlen(skb), DMA_TO_DEVICE);
+ off = 1;
+ } else
+ off = 0;
+
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i) {
+ skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
+ ib_dma_unmap_page(ca, mapping[i + off], frag->size,
+ DMA_TO_DEVICE);
+ }
+}
+
static void ipoib_ib_handle_tx_wc(struct net_device *dev, struct ib_wc *wc)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
tx_req = &priv->tx_ring[wr_id];
- ib_dma_unmap_single(priv->ca, tx_req->mapping,
- tx_req->skb->len, DMA_TO_DEVICE);
+ ipoib_dma_unmap_tx(priv->ca, tx_req);
++dev->stats.tx_packets;
dev->stats.tx_bytes += tx_req->skb->len;
spin_lock_irqsave(&priv->tx_lock, flags);
++priv->tx_tail;
- if (unlikely(test_bit(IPOIB_FLAG_NETIF_STOPPED, &priv->flags)) &&
- priv->tx_head - priv->tx_tail <= ipoib_sendq_size >> 1) {
- clear_bit(IPOIB_FLAG_NETIF_STOPPED, &priv->flags);
+ if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) &&
+ netif_queue_stopped(dev) &&
+ test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags))
netif_wake_queue(dev);
- }
spin_unlock_irqrestore(&priv->tx_lock, flags);
if (wc->status != IB_WC_SUCCESS &&
for (i = 0; i < n; i++) {
struct ib_wc *wc = priv->ibwc + i;
- if (wc->wr_id & IPOIB_CM_OP_SRQ) {
+ if (wc->wr_id & IPOIB_OP_RECV) {
++done;
- ipoib_cm_handle_rx_wc(dev, wc);
- } else if (wc->wr_id & IPOIB_OP_RECV) {
- ++done;
- ipoib_ib_handle_rx_wc(dev, wc);
- } else
- ipoib_ib_handle_tx_wc(dev, wc);
+ if (wc->wr_id & IPOIB_OP_CM)
+ ipoib_cm_handle_rx_wc(dev, wc);
+ else
+ ipoib_ib_handle_rx_wc(dev, wc);
+ } else {
+ if (wc->wr_id & IPOIB_OP_CM)
+ ipoib_cm_handle_tx_wc(dev, wc);
+ else
+ ipoib_ib_handle_tx_wc(dev, wc);
+ }
}
if (n != t)
static inline int post_send(struct ipoib_dev_priv *priv,
unsigned int wr_id,
struct ib_ah *address, u32 qpn,
- u64 addr, int len)
+ struct ipoib_tx_buf *tx_req,
+ void *head, int hlen)
{
struct ib_send_wr *bad_wr;
+ int i, off;
+ struct sk_buff *skb = tx_req->skb;
+ skb_frag_t *frags = skb_shinfo(skb)->frags;
+ int nr_frags = skb_shinfo(skb)->nr_frags;
+ u64 *mapping = tx_req->mapping;
+
+ if (skb_headlen(skb)) {
+ priv->tx_sge[0].addr = mapping[0];
+ priv->tx_sge[0].length = skb_headlen(skb);
+ off = 1;
+ } else
+ off = 0;
- priv->tx_sge.addr = addr;
- priv->tx_sge.length = len;
-
- priv->tx_wr.wr_id = wr_id;
- priv->tx_wr.wr.ud.remote_qpn = qpn;
- priv->tx_wr.wr.ud.ah = address;
+ for (i = 0; i < nr_frags; ++i) {
+ priv->tx_sge[i + off].addr = mapping[i + off];
+ priv->tx_sge[i + off].length = frags[i].size;
+ }
+ priv->tx_wr.num_sge = nr_frags + off;
+ 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 = skb_shinfo(skb)->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);
}
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
struct ipoib_tx_buf *tx_req;
- u64 addr;
-
- if (unlikely(skb->len > priv->mcast_mtu + IPOIB_ENCAP_LEN)) {
- ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n",
- skb->len, priv->mcast_mtu + IPOIB_ENCAP_LEN);
- ++dev->stats.tx_dropped;
- ++dev->stats.tx_errors;
- ipoib_cm_skb_too_long(dev, skb, priv->mcast_mtu);
- return;
+ int hlen;
+ void *phead;
+
+ if (skb_is_gso(skb)) {
+ hlen = skb_transport_offset(skb) + tcp_hdrlen(skb);
+ phead = skb->data;
+ if (unlikely(!skb_pull(skb, hlen))) {
+ ipoib_warn(priv, "linear data too small\n");
+ ++dev->stats.tx_dropped;
+ ++dev->stats.tx_errors;
+ dev_kfree_skb_any(skb);
+ return;
+ }
+ } else {
+ if (unlikely(skb->len > priv->mcast_mtu + IPOIB_ENCAP_LEN)) {
+ ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n",
+ skb->len, priv->mcast_mtu + IPOIB_ENCAP_LEN);
+ ++dev->stats.tx_dropped;
+ ++dev->stats.tx_errors;
+ ipoib_cm_skb_too_long(dev, skb, priv->mcast_mtu);
+ return;
+ }
+ phead = NULL;
+ hlen = 0;
}
ipoib_dbg_data(priv, "sending packet, length=%d address=%p qpn=0x%06x\n",
*/
tx_req = &priv->tx_ring[priv->tx_head & (ipoib_sendq_size - 1)];
tx_req->skb = skb;
- addr = ib_dma_map_single(priv->ca, skb->data, skb->len,
- DMA_TO_DEVICE);
- if (unlikely(ib_dma_mapping_error(priv->ca, addr))) {
+ if (unlikely(ipoib_dma_map_tx(priv->ca, tx_req))) {
++dev->stats.tx_errors;
dev_kfree_skb_any(skb);
return;
}
- tx_req->mapping = addr;
+
+ if (skb->ip_summed == CHECKSUM_PARTIAL)
+ priv->tx_wr.send_flags |= IB_SEND_IP_CSUM;
+ else
+ priv->tx_wr.send_flags &= ~IB_SEND_IP_CSUM;
if (unlikely(post_send(priv, priv->tx_head & (ipoib_sendq_size - 1),
- address->ah, qpn, addr, skb->len))) {
+ address->ah, qpn, tx_req, phead, hlen))) {
ipoib_warn(priv, "post_send failed\n");
++dev->stats.tx_errors;
- ib_dma_unmap_single(priv->ca, addr, skb->len, DMA_TO_DEVICE);
+ ipoib_dma_unmap_tx(priv->ca, tx_req);
dev_kfree_skb_any(skb);
} else {
dev->trans_start = jiffies;
address->last_send = priv->tx_head;
++priv->tx_head;
- if (priv->tx_head - priv->tx_tail == ipoib_sendq_size) {
+ if (++priv->tx_outstanding == ipoib_sendq_size) {
ipoib_dbg(priv, "TX ring full, stopping kernel net queue\n");
netif_stop_queue(dev);
- set_bit(IPOIB_FLAG_NETIF_STOPPED, &priv->flags);
}
}
}
__ipoib_reap_ah(dev);
if (!test_bit(IPOIB_STOP_REAPER, &priv->flags))
- queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task, HZ);
+ queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task,
+ round_jiffies_relative(HZ));
}
int ipoib_ib_dev_open(struct net_device *dev)
}
clear_bit(IPOIB_STOP_REAPER, &priv->flags);
- queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task, HZ);
+ queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task,
+ round_jiffies_relative(HZ));
set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags);
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))
+ 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);
if (priv->ibwc[i].status == IB_WC_SUCCESS)
priv->ibwc[i].status = IB_WC_WR_FLUSH_ERR;
- if (priv->ibwc[i].wr_id & IPOIB_CM_OP_SRQ)
- ipoib_cm_handle_rx_wc(dev, priv->ibwc + i);
- else if (priv->ibwc[i].wr_id & IPOIB_OP_RECV)
- ipoib_ib_handle_rx_wc(dev, priv->ibwc + i);
- else
- ipoib_ib_handle_tx_wc(dev, priv->ibwc + i);
+ if (priv->ibwc[i].wr_id & IPOIB_OP_RECV) {
+ if (priv->ibwc[i].wr_id & IPOIB_OP_CM)
+ ipoib_cm_handle_rx_wc(dev, priv->ibwc + i);
+ else
+ ipoib_ib_handle_rx_wc(dev, priv->ibwc + i);
+ } else {
+ if (priv->ibwc[i].wr_id & IPOIB_OP_CM)
+ ipoib_cm_handle_tx_wc(dev, priv->ibwc + i);
+ else
+ ipoib_ib_handle_tx_wc(dev, priv->ibwc + i);
+ }
}
} while (n == IPOIB_NUM_WC);
}
while ((int) priv->tx_tail - (int) priv->tx_head < 0) {
tx_req = &priv->tx_ring[priv->tx_tail &
(ipoib_sendq_size - 1)];
- ib_dma_unmap_single(priv->ca,
- tx_req->mapping,
- tx_req->skb->len,
- DMA_TO_DEVICE);
+ ipoib_dma_unmap_tx(priv->ca, tx_req);
dev_kfree_skb_any(tx_req->skb);
++priv->tx_tail;
+ --priv->tx_outstanding;
}
for (i = 0; i < ipoib_recvq_size; ++i) {
rx_req = &priv->rx_ring[i];
if (!rx_req->skb)
continue;
- ib_dma_unmap_single(priv->ca,
- rx_req->mapping,
- IPOIB_BUF_SIZE,
- DMA_FROM_DEVICE);
+ ipoib_ud_dma_unmap_rx(priv,
+ priv->rx_ring[i].mapping);
dev_kfree_skb_any(rx_req->skb);
rx_req->skb = NULL;
}
if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &new_index)) {
clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
ipoib_ib_dev_down(dev, 0);
- ipoib_pkey_dev_delay_open(dev);
- return;
+ ipoib_ib_dev_stop(dev, 0);
+ if (ipoib_pkey_dev_delay_open(dev))
+ return;
}
- set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
/* restart QP only if P_Key index is changed */
- if (new_index == priv->pkey_index) {
+ 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;
}
projects / linux-2.6-omap-h63xx.git / blobdiff