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Date: Thu, 20 Oct 2011 10:01:45 +0100
From: Ian Campbell <ian.campbell@...rix.com>
To: "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC: Ian Campbell <ian.campbell@...rix.com>, netdev@...r.kernel.org
Subject: [PATCH 2/6] mlx4: convert to SKB paged frag API.
Signed-off-by: Ian Campbell <ian.campbell@...rix.com>
Cc: netdev@...r.kernel.org
---
drivers/net/ethernet/mellanox/mlx4/en_rx.c | 32 ++++++++++++++--------------
drivers/net/ethernet/mellanox/mlx4/en_tx.c | 20 +++--------------
2 files changed, 20 insertions(+), 32 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_rx.c b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
index 9b18d85..af26983 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
@@ -44,7 +44,7 @@
static int mlx4_en_alloc_frag(struct mlx4_en_priv *priv,
struct mlx4_en_rx_desc *rx_desc,
- struct skb_frag_struct *skb_frags,
+ struct page_frag *skb_frags,
struct mlx4_en_rx_alloc *ring_alloc,
int i)
{
@@ -61,7 +61,7 @@ static int mlx4_en_alloc_frag(struct mlx4_en_priv *priv,
return -ENOMEM;
skb_frags[i].page = page_alloc->page;
- skb_frags[i].page_offset = page_alloc->offset;
+ skb_frags[i].offset = page_alloc->offset;
page_alloc->page = page;
page_alloc->offset = frag_info->frag_align;
} else {
@@ -69,11 +69,11 @@ static int mlx4_en_alloc_frag(struct mlx4_en_priv *priv,
get_page(page);
skb_frags[i].page = page;
- skb_frags[i].page_offset = page_alloc->offset;
+ skb_frags[i].offset = page_alloc->offset;
page_alloc->offset += frag_info->frag_stride;
}
dma = pci_map_single(mdev->pdev, page_address(skb_frags[i].page) +
- skb_frags[i].page_offset, frag_info->frag_size,
+ skb_frags[i].offset, frag_info->frag_size,
PCI_DMA_FROMDEVICE);
rx_desc->data[i].addr = cpu_to_be64(dma);
return 0;
@@ -157,8 +157,8 @@ static int mlx4_en_prepare_rx_desc(struct mlx4_en_priv *priv,
struct mlx4_en_rx_ring *ring, int index)
{
struct mlx4_en_rx_desc *rx_desc = ring->buf + (index * ring->stride);
- struct skb_frag_struct *skb_frags = ring->rx_info +
- (index << priv->log_rx_info);
+ struct page_frag *skb_frags = ring->rx_info +
+ (index << priv->log_rx_info);
int i;
for (i = 0; i < priv->num_frags; i++)
@@ -183,7 +183,7 @@ static void mlx4_en_free_rx_desc(struct mlx4_en_priv *priv,
int index)
{
struct mlx4_en_dev *mdev = priv->mdev;
- struct skb_frag_struct *skb_frags;
+ struct page_frag *skb_frags;
struct mlx4_en_rx_desc *rx_desc = ring->buf + (index << ring->log_stride);
dma_addr_t dma;
int nr;
@@ -194,7 +194,7 @@ static void mlx4_en_free_rx_desc(struct mlx4_en_priv *priv,
dma = be64_to_cpu(rx_desc->data[nr].addr);
en_dbg(DRV, priv, "Unmapping buffer at dma:0x%llx\n", (u64) dma);
- pci_unmap_single(mdev->pdev, dma, skb_frag_size(&skb_frags[nr]),
+ pci_unmap_single(mdev->pdev, dma, skb_frags[nr].size,
PCI_DMA_FROMDEVICE);
put_page(skb_frags[nr].page);
}
@@ -403,7 +403,7 @@ void mlx4_en_deactivate_rx_ring(struct mlx4_en_priv *priv,
/* Unmap a completed descriptor and free unused pages */
static int mlx4_en_complete_rx_desc(struct mlx4_en_priv *priv,
struct mlx4_en_rx_desc *rx_desc,
- struct skb_frag_struct *skb_frags,
+ struct page_frag *skb_frags,
struct skb_frag_struct *skb_frags_rx,
struct mlx4_en_rx_alloc *page_alloc,
int length)
@@ -420,9 +420,9 @@ static int mlx4_en_complete_rx_desc(struct mlx4_en_priv *priv,
break;
/* Save page reference in skb */
- skb_frags_rx[nr].page = skb_frags[nr].page;
- skb_frag_size_set(&skb_frags_rx[nr], skb_frag_size(&skb_frags[nr]));
- skb_frags_rx[nr].page_offset = skb_frags[nr].page_offset;
+ __skb_frag_set_page(&skb_frags_rx[nr], skb_frags[nr].page);
+ skb_frag_size_set(&skb_frags_rx[nr], skb_frags[nr].size);
+ skb_frags_rx[nr].page_offset = skb_frags[nr].offset;
dma = be64_to_cpu(rx_desc->data[nr].addr);
/* Allocate a replacement page */
@@ -444,7 +444,7 @@ fail:
* the descriptor) of this packet; remaining fragments are reused... */
while (nr > 0) {
nr--;
- put_page(skb_frags_rx[nr].page);
+ __skb_frag_unref(&skb_frags_rx[nr]);
}
return 0;
}
@@ -452,7 +452,7 @@ fail:
static struct sk_buff *mlx4_en_rx_skb(struct mlx4_en_priv *priv,
struct mlx4_en_rx_desc *rx_desc,
- struct skb_frag_struct *skb_frags,
+ struct page_frag *skb_frags,
struct mlx4_en_rx_alloc *page_alloc,
unsigned int length)
{
@@ -474,7 +474,7 @@ static struct sk_buff *mlx4_en_rx_skb(struct mlx4_en_priv *priv,
/* Get pointer to first fragment so we could copy the headers into the
* (linear part of the) skb */
- va = page_address(skb_frags[0].page) + skb_frags[0].page_offset;
+ va = page_address(skb_frags[0].page) + skb_frags[0].offset;
if (length <= SMALL_PACKET_SIZE) {
/* We are copying all relevant data to the skb - temporarily
@@ -533,7 +533,7 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_cqe *cqe;
struct mlx4_en_rx_ring *ring = &priv->rx_ring[cq->ring];
- struct skb_frag_struct *skb_frags;
+ struct page_frag *skb_frags;
struct mlx4_en_rx_desc *rx_desc;
struct sk_buff *skb;
int index;
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_tx.c b/drivers/net/ethernet/mellanox/mlx4/en_tx.c
index 75dda26..75338eb 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_tx.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_tx.c
@@ -460,26 +460,13 @@ static inline void mlx4_en_xmit_poll(struct mlx4_en_priv *priv, int tx_ind)
}
}
-static void *get_frag_ptr(struct sk_buff *skb)
-{
- struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[0];
- struct page *page = frag->page;
- void *ptr;
-
- ptr = page_address(page);
- if (unlikely(!ptr))
- return NULL;
-
- return ptr + frag->page_offset;
-}
-
static int is_inline(struct sk_buff *skb, void **pfrag)
{
void *ptr;
if (inline_thold && !skb_is_gso(skb) && skb->len <= inline_thold) {
if (skb_shinfo(skb)->nr_frags == 1) {
- ptr = get_frag_ptr(skb);
+ ptr = skb_frag_address_safe(&skb_shinfo(skb)->frags[0]);
if (unlikely(!ptr))
return 0;
@@ -756,8 +743,9 @@ netdev_tx_t mlx4_en_xmit(struct sk_buff *skb, struct net_device *dev)
/* Map fragments */
for (i = skb_shinfo(skb)->nr_frags - 1; i >= 0; i--) {
frag = &skb_shinfo(skb)->frags[i];
- dma = pci_map_page(mdev->dev->pdev, frag->page, frag->page_offset,
- skb_frag_size(frag), PCI_DMA_TODEVICE);
+ dma = skb_frag_dma_map(&mdev->dev->pdev->dev, frag,
+ 0, skb_frag_size(frag),
+ DMA_TO_DEVICE);
data->addr = cpu_to_be64(dma);
data->lkey = cpu_to_be32(mdev->mr.key);
wmb();
--
1.7.2.5
--
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