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cxgbi: convert to SKB paged frag API. 

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Mike Christie <michaelc@cs.wisc.edu>
Cc: James Bottomley <James.Bottomley@suse.de>
Cc: Karen Xie <kxie@chelsio.com>
Cc: linux-scsi@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ian Campbell 2011-10-19 23:01:48 +00:00 committed by David S. Miller
parent a0006a86cb
commit 6a39a16a5a
2 changed files with 16 additions and 14 deletions
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28
drivers/scsi/cxgbi/libcxgbi.c
View File

@ -1787,7 +1787,7 @@ static int sgl_seek_offset(struct scatterlist *sgl, unsigned int sgcnt,
}
static int sgl_read_to_frags(struct scatterlist *sg, unsigned int sgoffset,
unsigned int dlen, skb_frag_t *frags,
unsigned int dlen, struct page_frag *frags,
int frag_max)
{
unsigned int datalen = dlen;
@ -1814,8 +1814,8 @@ static int sgl_read_to_frags(struct scatterlist *sg, unsigned int sgoffset,
copy = min(datalen, sglen);
if (i && page == frags[i - 1].page &&
sgoffset + sg->offset ==
frags[i - 1].page_offset + skb_frag_size(&frags[i - 1])) {
skb_frag_size_add(&frags[i - 1], copy);
frags[i - 1].offset + frags[i - 1].size) {
frags[i - 1].size += copy;
} else {
if (i >= frag_max) {
pr_warn("too many pages %u, dlen %u.\n",
@ -1824,8 +1824,8 @@ static int sgl_read_to_frags(struct scatterlist *sg, unsigned int sgoffset,
}
frags[i].page = page;
frags[i].page_offset = sg->offset + sgoffset;
skb_frag_size_set(&frags[i], copy);
frags[i].offset = sg->offset + sgoffset;
frags[i].size = copy;
i++;
}
datalen -= copy;
@ -1944,15 +1944,15 @@ int cxgbi_conn_init_pdu(struct iscsi_task *task, unsigned int offset,
if (tdata->nr_frags > MAX_SKB_FRAGS ||
(padlen && tdata->nr_frags == MAX_SKB_FRAGS)) {
char *dst = skb->data + task->hdr_len;
skb_frag_t *frag = tdata->frags;
struct page_frag *frag = tdata->frags;
/* data fits in the skb's headroom */
for (i = 0; i < tdata->nr_frags; i++, frag++) {
char *src = kmap_atomic(frag->page,
KM_SOFTIRQ0);
memcpy(dst, src+frag->page_offset, skb_frag_size(frag));
dst += skb_frag_size(frag);
memcpy(dst, src+frag->offset, frag->size);
dst += frag->size;
kunmap_atomic(src, KM_SOFTIRQ0);
}
if (padlen) {
@ -1962,11 +1962,13 @@ int cxgbi_conn_init_pdu(struct iscsi_task *task, unsigned int offset,
skb_put(skb, count + padlen);
} else {
/* data fit into frag_list */
for (i = 0; i < tdata->nr_frags; i++)
get_page(tdata->frags[i].page);
memcpy(skb_shinfo(skb)->frags, tdata->frags,
sizeof(skb_frag_t) * tdata->nr_frags);
for (i = 0; i < tdata->nr_frags; i++) {
__skb_fill_page_desc(skb, i,
tdata->frags[i].page,
tdata->frags[i].offset,
tdata->frags[i].size);
skb_frag_ref(skb, i);
}
skb_shinfo(skb)->nr_frags = tdata->nr_frags;
skb->len += count;
skb->data_len += count;

2
drivers/scsi/cxgbi/libcxgbi.h
View File

@ -574,7 +574,7 @@ struct cxgbi_endpoint {
#define MAX_PDU_FRAGS ((ULP2_MAX_PDU_PAYLOAD + 512 - 1) / 512)
struct cxgbi_task_data {
unsigned short nr_frags;
skb_frag_t frags[MAX_PDU_FRAGS];
struct page_frag frags[MAX_PDU_FRAGS];
struct sk_buff *skb;
unsigned int offset;
unsigned int count;