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Message-ID: <20110824183010.GG15675@dumpdata.com>
Date: Wed, 24 Aug 2011 14:30:10 -0400
From: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To: Ian Campbell <ian.campbell@...rix.com>
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
Hank Janssen <hjanssen@...rosoft.com>,
Haiyang Zhang <haiyangz@...rosoft.com>,
Greg Kroah-Hartman <gregkh@...e.de>,
"K. Y. Srinivasan" <kys@...rosoft.com>,
Abhishek Kane <v-abkane@...rosoft.com>,
devel@...verdev.osuosl.org
Subject: Re: [PATCH 68/75] hv: netvsc: convert to SKB paged frag API.
What is with the 'XXX' ?
> diff --git a/drivers/net/cxgb4/sge.c b/drivers/net/cxgb4/sge.c
> index f1813b5..3e7c4b3 100644
> --- a/drivers/net/cxgb4/sge.c
> +++ b/drivers/net/cxgb4/sge.c
> @@ -1416,7 +1416,7 @@ static inline void copy_frags(struct sk_buff *skb,
> unsigned int n;
>
> /* usually there's just one frag */
> - skb_frag_set_page(skb, 0, gl->frags[0].page);
> + skb_frag_set_page(skb, 0, gl->frags[0].page.p); /* XXX */
> 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;
> @@ -1425,7 +1425,7 @@ static inline void copy_frags(struct sk_buff *skb,
> memcpy(&ssi->frags[1], &gl->frags[1], n * sizeof(skb_frag_t));
>
> /* get a reference to the last page, we don't own it */
> - get_page(gl->frags[n].page);
> + get_page(gl->frags[n].page.p); /* XXX */
> }
>
> /**
> @@ -1482,7 +1482,7 @@ static void t4_pktgl_free(const struct pkt_gl *gl)
> const skb_frag_t *p;
>
> for (p = gl->frags, n = gl->nfrags - 1; n--; p++)
> - put_page(p->page);
> + put_page(p->page.p); /* XXX */
> }
>
> /*
> @@ -1635,7 +1635,7 @@ static void restore_rx_bufs(const struct pkt_gl *si, struct sge_fl *q,
> else
> q->cidx--;
> d = &q->sdesc[q->cidx];
> - d->page = si->frags[frags].page;
> + d->page = si->frags[frags].page.p; /* XXX */
> d->dma_addr |= RX_UNMAPPED_BUF;
> q->avail++;
> }
> @@ -1717,7 +1717,7 @@ static int process_responses(struct sge_rspq *q, int budget)
> for (frags = 0, fp = si.frags; ; frags++, fp++) {
> rsd = &rxq->fl.sdesc[rxq->fl.cidx];
> bufsz = get_buf_size(rsd);
> - fp->page = rsd->page;
> + fp->page.p = rsd->page; /* XXX */
> fp->page_offset = q->offset;
> fp->size = min(bufsz, len);
> len -= fp->size;
> @@ -1734,8 +1734,8 @@ static int process_responses(struct sge_rspq *q, int budget)
> get_buf_addr(rsd),
> fp->size, DMA_FROM_DEVICE);
>
> - si.va = page_address(si.frags[0].page) +
> - si.frags[0].page_offset;
> + si.va = page_address(si.frags[0].page.p) +
> + si.frags[0].page_offset; /* XXX */
>
> prefetch(si.va);
>
> diff --git a/drivers/net/cxgb4vf/sge.c b/drivers/net/cxgb4vf/sge.c
> index 6d6060e..3688423 100644
> --- a/drivers/net/cxgb4vf/sge.c
> +++ b/drivers/net/cxgb4vf/sge.c
> @@ -1397,7 +1397,7 @@ struct sk_buff *t4vf_pktgl_to_skb(const struct pkt_gl *gl,
> skb_copy_to_linear_data(skb, gl->va, pull_len);
>
> ssi = skb_shinfo(skb);
> - skb_frag_set_page(skb, 0, gl->frags[0].page);
> + skb_frag_set_page(skb, 0, gl->frags[0].page.p); /* XXX */
> ssi->frags[0].page_offset = gl->frags[0].page_offset + pull_len;
> ssi->frags[0].size = gl->frags[0].size - pull_len;
> if (gl->nfrags > 1)
> @@ -1410,7 +1410,7 @@ struct sk_buff *t4vf_pktgl_to_skb(const struct pkt_gl *gl,
> skb->truesize += skb->data_len;
>
> /* Get a reference for the last page, we don't own it */
> - get_page(gl->frags[gl->nfrags - 1].page);
> + get_page(gl->frags[gl->nfrags - 1].page.p); /* XXX */
> }
>
> out:
> @@ -1430,7 +1430,7 @@ void t4vf_pktgl_free(const struct pkt_gl *gl)
>
> frag = gl->nfrags - 1;
> while (frag--)
> - put_page(gl->frags[frag].page);
> + put_page(gl->frags[frag].page.p); /* XXX */
> }
>
> /**
> @@ -1450,7 +1450,7 @@ static inline void copy_frags(struct sk_buff *skb,
> unsigned int n;
>
> /* usually there's just one frag */
> - skb_frag_set_page(skb, 0, gl->frags[0].page);
> + skb_frag_set_page(skb, 0, gl->frags[0].page.p); /* XXX */
> si->frags[0].page_offset = gl->frags[0].page_offset + offset;
> si->frags[0].size = gl->frags[0].size - offset;
> si->nr_frags = gl->nfrags;
> @@ -1460,7 +1460,7 @@ static inline void copy_frags(struct sk_buff *skb,
> memcpy(&si->frags[1], &gl->frags[1], n * sizeof(skb_frag_t));
>
> /* get a reference to the last page, we don't own it */
> - get_page(gl->frags[n].page);
> + get_page(gl->frags[n].page.p); /* XXX */
> }
>
> /**
> @@ -1613,7 +1613,7 @@ static void restore_rx_bufs(const struct pkt_gl *gl, struct sge_fl *fl,
> else
> fl->cidx--;
> sdesc = &fl->sdesc[fl->cidx];
> - sdesc->page = gl->frags[frags].page;
> + sdesc->page = gl->frags[frags].page.p; /* XXX */
> sdesc->dma_addr |= RX_UNMAPPED_BUF;
> fl->avail++;
> }
> @@ -1701,7 +1701,7 @@ int process_responses(struct sge_rspq *rspq, int budget)
> BUG_ON(rxq->fl.avail == 0);
> sdesc = &rxq->fl.sdesc[rxq->fl.cidx];
> bufsz = get_buf_size(sdesc);
> - fp->page = sdesc->page;
> + fp->page.p = sdesc->page; /* XXX */
> fp->page_offset = rspq->offset;
> fp->size = min(bufsz, len);
> len -= fp->size;
> @@ -1719,8 +1719,8 @@ int process_responses(struct sge_rspq *rspq, int budget)
> dma_sync_single_for_cpu(rspq->adapter->pdev_dev,
> get_buf_addr(sdesc),
> fp->size, DMA_FROM_DEVICE);
> - gl.va = (page_address(gl.frags[0].page) +
> - gl.frags[0].page_offset);
> + gl.va = (page_address(gl.frags[0].page.p) +
> + gl.frags[0].page_offset); /* XXX */
> prefetch(gl.va);
>
--
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