From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ian Campbell Subject: [PATCH 3/9] cxgb4: convert to SKB paged frag API. Date: Mon, 10 Oct 2011 12:11:35 +0100 Message-ID: <1318245101-16890-3-git-send-email-ian.campbell@citrix.com> References: <1318245076.21903.408.camel@zakaz.uk.xensource.com> Mime-Version: 1.0 Content-Type: text/plain Cc: Ian Campbell , Dimitris Michailidis To: netdev@vger.kernel.org Return-path: Received: from smtp02.citrix.com ([66.165.176.63]:44685 "EHLO SMTP02.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753634Ab1JJLLq (ORCPT ); Mon, 10 Oct 2011 07:11:46 -0400 In-Reply-To: <1318245076.21903.408.camel@zakaz.uk.xensource.com> Sender: netdev-owner@vger.kernel.org List-ID: Signed-off-by: Ian Campbell Cc: Dimitris Michailidis Cc: netdev@vger.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