cxgb4vf: convert to SKB paged frag API.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Cc: Casey Leedom <leedom@chelsio.com>
Cc: netdev@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/chelsio/cxgb4vf/adapter.h b/drivers/net/ethernet/chelsio/cxgb4vf/adapter.h
index 594334d..611396c 100644 (file)
--- a/drivers/net/ethernet/chelsio/cxgb4vf/adapter.h
+++ b/drivers/net/ethernet/chelsio/cxgb4vf/adapter.h
@@ -144,7 +144,7 @@ struct sge_fl {
  * An ingress packet gather list.
  */
 struct pkt_gl {
-       skb_frag_t frags[MAX_SKB_FRAGS];
+       struct page_frag 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/cxgb4vf/sge.c b/drivers/net/ethernet/chelsio/cxgb4vf/sge.c
index c2d456d..8d5d55a 100644 (file)
--- a/drivers/net/ethernet/chelsio/cxgb4vf/sge.c
+++ b/drivers/net/ethernet/chelsio/cxgb4vf/sge.c
@@ -296,8 +296,8 @@ static int map_skb(struct device *dev, const struct sk_buff *skb,
        si = skb_shinfo(skb);
        end = &si->frags[si->nr_frags];
        for (fp = si->frags; fp < end; fp++) {
-               *++addr = dma_map_page(dev, fp->page, fp->page_offset,
-                                      skb_frag_size(fp), DMA_TO_DEVICE);
+               *++addr = skb_frag_dma_map(dev, fp, 0, skb_frag_size(fp),
+                                          DMA_TO_DEVICE);
                if (dma_mapping_error(dev, *addr))
                        goto unwind;
        }
@@ -1356,6 +1356,35 @@ out_free:
        return NETDEV_TX_OK;
 }
 
+/**
+ *     copy_frags - copy fragments from gather list into skb_shared_info
+ *     @skb: destination skb
+ *     @gl: source internal packet gather list
+ *     @offset: packet start offset in first page
+ *
+ *     Copy an internal packet gather list into a Linux skb_shared_info
+ *     structure.
+ */
+static inline void copy_frags(struct sk_buff *skb,
+                             const struct pkt_gl *gl,
+                             unsigned int offset)
+{
+       int i;
+
+       /* usually there's just one frag */
+       __skb_fill_page_desc(skb, 0, gl->frags[0].page,
+                            gl->frags[0].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].offset,
+                                    gl->frags[i].size);
+
+       /* get a reference to the last page, we don't own it */
+       get_page(gl->frags[gl->nfrags - 1].page);
+}
+
 /**
  *     t4vf_pktgl_to_skb - build an sk_buff from a packet gather list
  *     @gl: the gather list
@@ -1369,7 +1398,6 @@ struct sk_buff *t4vf_pktgl_to_skb(const struct pkt_gl *gl,
                                  unsigned int skb_len, unsigned int pull_len)
 {
        struct sk_buff *skb;
-       struct skb_shared_info *ssi;
 
        /*
         * If the ingress packet is small enough, allocate an skb large enough
@@ -1396,21 +1424,10 @@ struct sk_buff *t4vf_pktgl_to_skb(const struct pkt_gl *gl,
                __skb_put(skb, pull_len);
                skb_copy_to_linear_data(skb, gl->va, pull_len);
 
-               ssi = skb_shinfo(skb);
-               ssi->frags[0].page = gl->frags[0].page;
-               ssi->frags[0].page_offset = gl->frags[0].page_offset + pull_len;
-               skb_frag_size_set(&ssi->frags[0], skb_frag_size(&gl->frags[0]) - pull_len);
-               if (gl->nfrags > 1)
-                       memcpy(&ssi->frags[1], &gl->frags[1],
-                              (gl->nfrags-1) * sizeof(skb_frag_t));
-               ssi->nr_frags = gl->nfrags;
-
+               copy_frags(skb, gl, pull_len);
                skb->len = gl->tot_len;
                skb->data_len = skb->len - pull_len;
                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);
        }
 
 out:
@@ -1433,35 +1450,6 @@ void t4vf_pktgl_free(const struct pkt_gl *gl)
                put_page(gl->frags[frag].page);
 }
 
-/**
- *     copy_frags - copy fragments from gather list into skb_shared_info
- *     @si: destination skb shared info structure
- *     @gl: source internal packet gather list
- *     @offset: packet start offset in first page
- *
- *     Copy an internal packet gather list into a Linux skb_shared_info
- *     structure.
- */
-static inline void copy_frags(struct skb_shared_info *si,
-                             const struct pkt_gl *gl,
-                             unsigned int offset)
-{
-       unsigned int n;
-
-       /* usually there's just one frag */
-       si->frags[0].page = gl->frags[0].page;
-       si->frags[0].page_offset = gl->frags[0].page_offset + offset;
-       skb_frag_size_set(&si->frags[0], skb_frag_size(&gl->frags[0]) - offset);
-       si->nr_frags = gl->nfrags;
-
-       n = gl->nfrags - 1;
-       if (n)
-               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);
-}
-
 /**
  *     do_gro - perform Generic Receive Offload ingress packet processing
  *     @rxq: ingress RX Ethernet Queue
@@ -1484,7 +1472,7 @@ static void do_gro(struct sge_eth_rxq *rxq, const struct pkt_gl *gl,
                return;
        }
 
-       copy_frags(skb_shinfo(skb), gl, PKTSHIFT);
+       copy_frags(skb, gl, PKTSHIFT);
        skb->len = gl->tot_len - PKTSHIFT;
        skb->data_len = skb->len;
        skb->truesize += skb->data_len;
@@ -1667,7 +1655,7 @@ int process_responses(struct sge_rspq *rspq, int budget)
                rmb();
                rsp_type = RSPD_TYPE(rc->type_gen);
                if (likely(rsp_type == RSP_TYPE_FLBUF)) {
-                       skb_frag_t *fp;
+                       struct page_frag *fp;
                        struct pkt_gl gl;
                        const struct rx_sw_desc *sdesc;
                        u32 bufsz, frag;
@@ -1701,9 +1689,9 @@ int process_responses(struct sge_rspq *rspq, int budget)
                                sdesc = &rxq->fl.sdesc[rxq->fl.cidx];
                                bufsz = get_buf_size(sdesc);
                                fp->page = sdesc->page;
-                               fp->page_offset = rspq->offset;
-                               skb_frag_size_set(fp, min(bufsz, len));
-                               len -= skb_frag_size(fp);
+                               fp->offset = rspq->offset;
+                               fp->size = min(bufsz, len);
+                               len -= fp->size;
                                if (!len)
                                        break;
                                unmap_rx_buf(rspq->adapter, &rxq->fl);
@@ -1717,9 +1705,9 @@ int process_responses(struct sge_rspq *rspq, int budget)
                         */
                        dma_sync_single_for_cpu(rspq->adapter->pdev_dev,
                                                get_buf_addr(sdesc),
-                                               skb_frag_size(fp), DMA_FROM_DEVICE);
+                                               fp->size, DMA_FROM_DEVICE);
                        gl.va = (page_address(gl.frags[0].page) +
-                                gl.frags[0].page_offset);
+                                gl.frags[0].offset);
                        prefetch(gl.va);
 
                        /*
@@ -1728,7 +1716,7 @@ int process_responses(struct sge_rspq *rspq, int budget)
                         */
                        ret = rspq->handler(rspq, rspq->cur_desc, &gl);
                        if (likely(ret == 0))
-                               rspq->offset += ALIGN(skb_frag_size(fp), FL_ALIGN);
+                               rspq->offset += ALIGN(fp->size, FL_ALIGN);
                        else
                                restore_rx_bufs(&gl, &rxq->fl, frag);
                } else if (likely(rsp_type == RSP_TYPE_CPL)) {