diff options
Diffstat (limited to 'drivers/s390/net/qeth_eddp.c')
| -rw-r--r-- | drivers/s390/net/qeth_eddp.c | 51 |
1 files changed, 20 insertions, 31 deletions
diff --git a/drivers/s390/net/qeth_eddp.c b/drivers/s390/net/qeth_eddp.c index 7ee1c06ed68a..f94f1f25eec6 100644 --- a/drivers/s390/net/qeth_eddp.c +++ b/drivers/s390/net/qeth_eddp.c @@ -1,6 +1,6 @@ /* * - * linux/drivers/s390/net/qeth_eddp.c ($Revision: 1.11 $) + * linux/drivers/s390/net/qeth_eddp.c ($Revision: 1.13 $) * * Enhanced Device Driver Packing (EDDP) support for the qeth driver. * @@ -8,7 +8,7 @@ * * Author(s): Thomas Spatzier <tspat@de.ibm.com> * - * $Revision: 1.11 $ $Date: 2005/03/24 09:04:18 $ + * $Revision: 1.13 $ $Date: 2005/05/04 20:19:18 $ * */ #include <linux/config.h> @@ -85,7 +85,7 @@ void qeth_eddp_buf_release_contexts(struct qeth_qdio_out_buffer *buf) { struct qeth_eddp_context_reference *ref; - + QETH_DBF_TEXT(trace, 6, "eddprctx"); while (!list_empty(&buf->ctx_list)){ ref = list_entry(buf->ctx_list.next, @@ -139,7 +139,7 @@ qeth_eddp_fill_buffer(struct qeth_qdio_out_q *queue, "buffer!\n"); goto out; } - } + } /* check if the whole next skb fits into current buffer */ if ((QETH_MAX_BUFFER_ELEMENTS(queue->card) - buf->next_element_to_fill) @@ -152,7 +152,7 @@ qeth_eddp_fill_buffer(struct qeth_qdio_out_q *queue, * and increment ctx's refcnt */ must_refcnt = 1; continue; - } + } if (must_refcnt){ must_refcnt = 0; if (qeth_eddp_buf_ref_context(buf, ctx)){ @@ -202,40 +202,29 @@ out: return flush_cnt; } -static inline int -qeth_get_skb_data_len(struct sk_buff *skb) -{ - int len = skb->len; - int i; - - for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i) - len -= skb_shinfo(skb)->frags[i].size; - return len; -} - static inline void qeth_eddp_create_segment_hdrs(struct qeth_eddp_context *ctx, - struct qeth_eddp_data *eddp) + struct qeth_eddp_data *eddp, int data_len) { u8 *page; int page_remainder; int page_offset; - int hdr_len; + int pkt_len; struct qeth_eddp_element *element; QETH_DBF_TEXT(trace, 5, "eddpcrsh"); page = ctx->pages[ctx->offset >> PAGE_SHIFT]; page_offset = ctx->offset % PAGE_SIZE; element = &ctx->elements[ctx->num_elements]; - hdr_len = eddp->nhl + eddp->thl; + pkt_len = eddp->nhl + eddp->thl + data_len; /* FIXME: layer2 and VLAN !!! */ if (eddp->qh.hdr.l2.id == QETH_HEADER_TYPE_LAYER2) - hdr_len += ETH_HLEN; + pkt_len += ETH_HLEN; if (eddp->mac.h_proto == __constant_htons(ETH_P_8021Q)) - hdr_len += VLAN_HLEN; - /* does complete header fit in current page ? */ + pkt_len += VLAN_HLEN; + /* does complete packet fit in current page ? */ page_remainder = PAGE_SIZE - page_offset; - if (page_remainder < (sizeof(struct qeth_hdr) + hdr_len)){ + if (page_remainder < (sizeof(struct qeth_hdr) + pkt_len)){ /* no -> go to start of next page */ ctx->offset += page_remainder; page = ctx->pages[ctx->offset >> PAGE_SHIFT]; @@ -281,7 +270,7 @@ qeth_eddp_copy_data_tcp(char *dst, struct qeth_eddp_data *eddp, int len, int left_in_frag; int copy_len; u8 *src; - + QETH_DBF_TEXT(trace, 5, "eddpcdtc"); if (skb_shinfo(eddp->skb)->nr_frags == 0) { memcpy(dst, eddp->skb->data + eddp->skb_offset, len); @@ -292,7 +281,7 @@ qeth_eddp_copy_data_tcp(char *dst, struct qeth_eddp_data *eddp, int len, while (len > 0) { if (eddp->frag < 0) { /* we're in skb->data */ - left_in_frag = qeth_get_skb_data_len(eddp->skb) + left_in_frag = (eddp->skb->len - eddp->skb->data_len) - eddp->skb_offset; src = eddp->skb->data + eddp->skb_offset; } else { @@ -424,7 +413,7 @@ __qeth_eddp_fill_context_tcp(struct qeth_eddp_context *ctx, struct tcphdr *tcph; int data_len; u32 hcsum; - + QETH_DBF_TEXT(trace, 5, "eddpftcp"); eddp->skb_offset = sizeof(struct qeth_hdr) + eddp->nhl + eddp->thl; tcph = eddp->skb->h.th; @@ -464,7 +453,7 @@ __qeth_eddp_fill_context_tcp(struct qeth_eddp_context *ctx, else hcsum = qeth_eddp_check_tcp6_hdr(eddp, data_len); /* fill the next segment into the context */ - qeth_eddp_create_segment_hdrs(ctx, eddp); + qeth_eddp_create_segment_hdrs(ctx, eddp, data_len); qeth_eddp_create_segment_data_tcp(ctx, eddp, data_len, hcsum); if (eddp->skb_offset >= eddp->skb->len) break; @@ -474,13 +463,13 @@ __qeth_eddp_fill_context_tcp(struct qeth_eddp_context *ctx, eddp->th.tcp.h.seq += data_len; } } - + static inline int qeth_eddp_fill_context_tcp(struct qeth_eddp_context *ctx, struct sk_buff *skb, struct qeth_hdr *qhdr) { struct qeth_eddp_data *eddp = NULL; - + QETH_DBF_TEXT(trace, 5, "eddpficx"); /* create our segmentation headers and copy original headers */ if (skb->protocol == ETH_P_IP) @@ -520,7 +509,7 @@ qeth_eddp_calc_num_pages(struct qeth_eddp_context *ctx, struct sk_buff *skb, int hdr_len) { int skbs_per_page; - + QETH_DBF_TEXT(trace, 5, "eddpcanp"); /* can we put multiple skbs in one page? */ skbs_per_page = PAGE_SIZE / (skb_shinfo(skb)->tso_size + hdr_len); @@ -600,7 +589,7 @@ qeth_eddp_create_context_tcp(struct qeth_card *card, struct sk_buff *skb, struct qeth_hdr *qhdr) { struct qeth_eddp_context *ctx = NULL; - + QETH_DBF_TEXT(trace, 5, "creddpct"); if (skb->protocol == ETH_P_IP) ctx = qeth_eddp_create_context_generic(card, skb, |