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Date: Mon, 10 Oct 2011 12:11:35 +0100
From: Ian Campbell <ian.campbell@...rix.com>
To: netdev@...r.kernel.org
CC: Ian Campbell <ian.campbell@...rix.com>,
Dimitris Michailidis <dm@...lsio.com>
Subject: [PATCH 3/9] cxgb4: convert to SKB paged frag API.
Signed-off-by: Ian Campbell <ian.campbell@...rix.com>
Cc: Dimitris Michailidis <dm@...lsio.com>
Cc: netdev@...r.kernel.org
---
drivers/net/ethernet/chelsio/cxgb4/cxgb4.h | 2 +-
drivers/net/ethernet/chelsio/cxgb4/sge.c | 33 ++++++++++++++-------------
2 files changed, 18 insertions(+), 17 deletions(-)
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
index 223a7f7..209cd69 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
@@ -326,7 +326,7 @@ struct sge_fl { /* SGE free-buffer queue state */
/* A packet gather list */
struct pkt_gl {
- skb_frag_t frags[MAX_SKB_FRAGS];
+ struct subpage frags[MAX_SKB_FRAGS];
void *va; /* virtual address of first byte */
unsigned int nfrags; /* # of fragments */
unsigned int tot_len; /* total length of fragments */
diff --git a/drivers/net/ethernet/chelsio/cxgb4/sge.c b/drivers/net/ethernet/chelsio/cxgb4/sge.c
index 56adf44..0100c4c 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/sge.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/sge.c
@@ -215,8 +215,8 @@ static int map_skb(struct device *dev, const struct sk_buff *skb,
end = &si->frags[si->nr_frags];
for (fp = si->frags; fp < end; fp++) {
- *++addr = dma_map_page(dev, fp->page, fp->page_offset, fp->size,
- DMA_TO_DEVICE);
+ *++addr = skb_frag_dma_map(dev, fp, 0, fp->size,
+ DMA_TO_DEVICE);
if (dma_mapping_error(dev, *addr))
goto unwind;
}
@@ -1409,22 +1409,23 @@ int cxgb4_ofld_send(struct net_device *dev, struct sk_buff *skb)
}
EXPORT_SYMBOL(cxgb4_ofld_send);
-static inline void copy_frags(struct skb_shared_info *ssi,
+static inline void copy_frags(struct sk_buff *skb,
const struct pkt_gl *gl, unsigned int offset)
{
- unsigned int n;
+ int i;
/* usually there's just one frag */
- ssi->frags[0].page = gl->frags[0].page;
- ssi->frags[0].page_offset = gl->frags[0].page_offset + offset;
- ssi->frags[0].size = gl->frags[0].size - offset;
- ssi->nr_frags = gl->nfrags;
- n = gl->nfrags - 1;
- if (n)
- memcpy(&ssi->frags[1], &gl->frags[1], n * sizeof(skb_frag_t));
+ __skb_fill_page_desc(skb, 0, gl->frags[0].page,
+ gl->frags[0].page_offset + offset,
+ gl->frags[0].size - offset);
+ skb_shinfo(skb)->nr_frags = gl->nfrags;
+ for (i = 1; i < gl->nfrags; i++)
+ __skb_fill_page_desc(skb, i, gl->frags[i].page,
+ gl->frags[i].page_offset,
+ gl->frags[i].size);
/* get a reference to the last page, we don't own it */
- get_page(gl->frags[n].page);
+ get_page(gl->frags[gl->nfrags - 1].page);
}
/**
@@ -1459,7 +1460,7 @@ struct sk_buff *cxgb4_pktgl_to_skb(const struct pkt_gl *gl,
__skb_put(skb, pull_len);
skb_copy_to_linear_data(skb, gl->va, pull_len);
- copy_frags(skb_shinfo(skb), gl, pull_len);
+ copy_frags(skb, gl, pull_len);
skb->len = gl->tot_len;
skb->data_len = skb->len - pull_len;
skb->truesize += skb->data_len;
@@ -1478,7 +1479,7 @@ EXPORT_SYMBOL(cxgb4_pktgl_to_skb);
static void t4_pktgl_free(const struct pkt_gl *gl)
{
int n;
- const skb_frag_t *p;
+ const struct subpage *p;
for (p = gl->frags, n = gl->nfrags - 1; n--; p++)
put_page(p->page);
@@ -1522,7 +1523,7 @@ static void do_gro(struct sge_eth_rxq *rxq, const struct pkt_gl *gl,
return;
}
- copy_frags(skb_shinfo(skb), gl, RX_PKT_PAD);
+ copy_frags(skb, gl, RX_PKT_PAD);
skb->len = gl->tot_len - RX_PKT_PAD;
skb->data_len = skb->len;
skb->truesize += skb->data_len;
@@ -1698,7 +1699,7 @@ static int process_responses(struct sge_rspq *q, int budget)
rmb();
rsp_type = RSPD_TYPE(rc->type_gen);
if (likely(rsp_type == RSP_TYPE_FLBUF)) {
- skb_frag_t *fp;
+ struct subpage *fp;
struct pkt_gl si;
const struct rx_sw_desc *rsd;
u32 len = ntohl(rc->pldbuflen_qid), bufsz, frags;
--
1.7.2.5
--
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