1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
644 lines
18 KiB
C
644 lines
18 KiB
C
/*
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*
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* linux/drivers/s390/net/qeth_eddp.c ($Revision: 1.11 $)
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*
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* Enhanced Device Driver Packing (EDDP) support for the qeth driver.
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*
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* Copyright 2004 IBM Corporation
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*
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* Author(s): Thomas Spatzier <tspat@de.ibm.com>
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*
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* $Revision: 1.11 $ $Date: 2005/03/24 09:04:18 $
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*
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*/
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#include <linux/config.h>
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#include <linux/errno.h>
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#include <linux/ip.h>
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#include <linux/inetdevice.h>
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#include <linux/netdevice.h>
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#include <linux/kernel.h>
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#include <linux/tcp.h>
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#include <net/tcp.h>
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#include <linux/skbuff.h>
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#include <net/ip.h>
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#include "qeth.h"
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#include "qeth_mpc.h"
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#include "qeth_eddp.h"
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int
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qeth_eddp_check_buffers_for_context(struct qeth_qdio_out_q *queue,
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struct qeth_eddp_context *ctx)
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{
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int index = queue->next_buf_to_fill;
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int elements_needed = ctx->num_elements;
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int elements_in_buffer;
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int skbs_in_buffer;
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int buffers_needed = 0;
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QETH_DBF_TEXT(trace, 5, "eddpcbfc");
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while(elements_needed > 0) {
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buffers_needed++;
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if (atomic_read(&queue->bufs[index].state) !=
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QETH_QDIO_BUF_EMPTY)
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return -EBUSY;
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elements_in_buffer = QETH_MAX_BUFFER_ELEMENTS(queue->card) -
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queue->bufs[index].next_element_to_fill;
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skbs_in_buffer = elements_in_buffer / ctx->elements_per_skb;
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elements_needed -= skbs_in_buffer * ctx->elements_per_skb;
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index = (index + 1) % QDIO_MAX_BUFFERS_PER_Q;
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}
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return buffers_needed;
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}
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static inline void
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qeth_eddp_free_context(struct qeth_eddp_context *ctx)
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{
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int i;
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QETH_DBF_TEXT(trace, 5, "eddpfctx");
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for (i = 0; i < ctx->num_pages; ++i)
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free_page((unsigned long)ctx->pages[i]);
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kfree(ctx->pages);
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if (ctx->elements != NULL)
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kfree(ctx->elements);
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kfree(ctx);
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}
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static inline void
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qeth_eddp_get_context(struct qeth_eddp_context *ctx)
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{
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atomic_inc(&ctx->refcnt);
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}
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void
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qeth_eddp_put_context(struct qeth_eddp_context *ctx)
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{
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if (atomic_dec_return(&ctx->refcnt) == 0)
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qeth_eddp_free_context(ctx);
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}
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void
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qeth_eddp_buf_release_contexts(struct qeth_qdio_out_buffer *buf)
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{
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struct qeth_eddp_context_reference *ref;
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QETH_DBF_TEXT(trace, 6, "eddprctx");
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while (!list_empty(&buf->ctx_list)){
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ref = list_entry(buf->ctx_list.next,
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struct qeth_eddp_context_reference, list);
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qeth_eddp_put_context(ref->ctx);
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list_del(&ref->list);
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kfree(ref);
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}
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}
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static inline int
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qeth_eddp_buf_ref_context(struct qeth_qdio_out_buffer *buf,
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struct qeth_eddp_context *ctx)
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{
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struct qeth_eddp_context_reference *ref;
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QETH_DBF_TEXT(trace, 6, "eddprfcx");
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ref = kmalloc(sizeof(struct qeth_eddp_context_reference), GFP_ATOMIC);
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if (ref == NULL)
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return -ENOMEM;
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qeth_eddp_get_context(ctx);
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ref->ctx = ctx;
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list_add_tail(&ref->list, &buf->ctx_list);
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return 0;
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}
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int
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qeth_eddp_fill_buffer(struct qeth_qdio_out_q *queue,
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struct qeth_eddp_context *ctx,
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int index)
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{
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struct qeth_qdio_out_buffer *buf = NULL;
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struct qdio_buffer *buffer;
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int elements = ctx->num_elements;
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int element = 0;
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int flush_cnt = 0;
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int must_refcnt = 1;
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int i;
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QETH_DBF_TEXT(trace, 5, "eddpfibu");
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while (elements > 0) {
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buf = &queue->bufs[index];
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if (atomic_read(&buf->state) != QETH_QDIO_BUF_EMPTY){
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/* normally this should not happen since we checked for
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* available elements in qeth_check_elements_for_context
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*/
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if (element == 0)
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return -EBUSY;
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else {
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PRINT_WARN("could only partially fill eddp "
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"buffer!\n");
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goto out;
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}
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}
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/* check if the whole next skb fits into current buffer */
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if ((QETH_MAX_BUFFER_ELEMENTS(queue->card) -
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buf->next_element_to_fill)
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< ctx->elements_per_skb){
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/* no -> go to next buffer */
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atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
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index = (index + 1) % QDIO_MAX_BUFFERS_PER_Q;
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flush_cnt++;
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/* new buffer, so we have to add ctx to buffer'ctx_list
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* and increment ctx's refcnt */
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must_refcnt = 1;
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continue;
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}
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if (must_refcnt){
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must_refcnt = 0;
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if (qeth_eddp_buf_ref_context(buf, ctx)){
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PRINT_WARN("no memory to create eddp context "
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"reference\n");
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goto out_check;
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}
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}
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buffer = buf->buffer;
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/* fill one skb into buffer */
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for (i = 0; i < ctx->elements_per_skb; ++i){
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buffer->element[buf->next_element_to_fill].addr =
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ctx->elements[element].addr;
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buffer->element[buf->next_element_to_fill].length =
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ctx->elements[element].length;
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buffer->element[buf->next_element_to_fill].flags =
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ctx->elements[element].flags;
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buf->next_element_to_fill++;
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element++;
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elements--;
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}
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}
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out_check:
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if (!queue->do_pack) {
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QETH_DBF_TEXT(trace, 6, "fillbfnp");
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/* set state to PRIMED -> will be flushed */
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if (buf->next_element_to_fill > 0){
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atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
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flush_cnt++;
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}
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} else {
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#ifdef CONFIG_QETH_PERF_STATS
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queue->card->perf_stats.skbs_sent_pack++;
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#endif
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QETH_DBF_TEXT(trace, 6, "fillbfpa");
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if (buf->next_element_to_fill >=
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QETH_MAX_BUFFER_ELEMENTS(queue->card)) {
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/*
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* packed buffer if full -> set state PRIMED
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* -> will be flushed
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*/
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atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
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flush_cnt++;
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}
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}
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out:
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return flush_cnt;
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}
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static inline int
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qeth_get_skb_data_len(struct sk_buff *skb)
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{
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int len = skb->len;
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int i;
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for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i)
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len -= skb_shinfo(skb)->frags[i].size;
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return len;
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}
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static inline void
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qeth_eddp_create_segment_hdrs(struct qeth_eddp_context *ctx,
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struct qeth_eddp_data *eddp)
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{
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u8 *page;
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int page_remainder;
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int page_offset;
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int hdr_len;
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struct qeth_eddp_element *element;
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QETH_DBF_TEXT(trace, 5, "eddpcrsh");
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page = ctx->pages[ctx->offset >> PAGE_SHIFT];
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page_offset = ctx->offset % PAGE_SIZE;
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element = &ctx->elements[ctx->num_elements];
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hdr_len = eddp->nhl + eddp->thl;
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/* FIXME: layer2 and VLAN !!! */
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if (eddp->qh.hdr.l2.id == QETH_HEADER_TYPE_LAYER2)
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hdr_len += ETH_HLEN;
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if (eddp->mac.h_proto == __constant_htons(ETH_P_8021Q))
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hdr_len += VLAN_HLEN;
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/* does complete header fit in current page ? */
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page_remainder = PAGE_SIZE - page_offset;
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if (page_remainder < (sizeof(struct qeth_hdr) + hdr_len)){
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/* no -> go to start of next page */
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ctx->offset += page_remainder;
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page = ctx->pages[ctx->offset >> PAGE_SHIFT];
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page_offset = 0;
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}
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memcpy(page + page_offset, &eddp->qh, sizeof(struct qeth_hdr));
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element->addr = page + page_offset;
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element->length = sizeof(struct qeth_hdr);
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ctx->offset += sizeof(struct qeth_hdr);
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page_offset += sizeof(struct qeth_hdr);
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/* add mac header (?) */
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if (eddp->qh.hdr.l2.id == QETH_HEADER_TYPE_LAYER2){
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memcpy(page + page_offset, &eddp->mac, ETH_HLEN);
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element->length += ETH_HLEN;
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ctx->offset += ETH_HLEN;
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page_offset += ETH_HLEN;
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}
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/* add VLAN tag */
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if (eddp->mac.h_proto == __constant_htons(ETH_P_8021Q)){
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memcpy(page + page_offset, &eddp->vlan, VLAN_HLEN);
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element->length += VLAN_HLEN;
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ctx->offset += VLAN_HLEN;
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page_offset += VLAN_HLEN;
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}
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/* add network header */
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memcpy(page + page_offset, (u8 *)&eddp->nh, eddp->nhl);
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element->length += eddp->nhl;
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eddp->nh_in_ctx = page + page_offset;
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ctx->offset += eddp->nhl;
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page_offset += eddp->nhl;
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/* add transport header */
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memcpy(page + page_offset, (u8 *)&eddp->th, eddp->thl);
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element->length += eddp->thl;
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eddp->th_in_ctx = page + page_offset;
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ctx->offset += eddp->thl;
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}
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static inline void
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qeth_eddp_copy_data_tcp(char *dst, struct qeth_eddp_data *eddp, int len,
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u32 *hcsum)
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{
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struct skb_frag_struct *frag;
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int left_in_frag;
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int copy_len;
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u8 *src;
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QETH_DBF_TEXT(trace, 5, "eddpcdtc");
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if (skb_shinfo(eddp->skb)->nr_frags == 0) {
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memcpy(dst, eddp->skb->data + eddp->skb_offset, len);
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*hcsum = csum_partial(eddp->skb->data + eddp->skb_offset, len,
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*hcsum);
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eddp->skb_offset += len;
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} else {
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while (len > 0) {
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if (eddp->frag < 0) {
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/* we're in skb->data */
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left_in_frag = qeth_get_skb_data_len(eddp->skb)
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- eddp->skb_offset;
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src = eddp->skb->data + eddp->skb_offset;
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} else {
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frag = &skb_shinfo(eddp->skb)->
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frags[eddp->frag];
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left_in_frag = frag->size - eddp->frag_offset;
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src = (u8 *)(
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(page_to_pfn(frag->page) << PAGE_SHIFT)+
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frag->page_offset + eddp->frag_offset);
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}
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if (left_in_frag <= 0) {
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eddp->frag++;
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eddp->frag_offset = 0;
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continue;
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}
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copy_len = min(left_in_frag, len);
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memcpy(dst, src, copy_len);
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*hcsum = csum_partial(src, copy_len, *hcsum);
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dst += copy_len;
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eddp->frag_offset += copy_len;
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eddp->skb_offset += copy_len;
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len -= copy_len;
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}
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}
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}
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static inline void
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qeth_eddp_create_segment_data_tcp(struct qeth_eddp_context *ctx,
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struct qeth_eddp_data *eddp, int data_len,
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u32 hcsum)
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{
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u8 *page;
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int page_remainder;
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int page_offset;
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struct qeth_eddp_element *element;
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int first_lap = 1;
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QETH_DBF_TEXT(trace, 5, "eddpcsdt");
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page = ctx->pages[ctx->offset >> PAGE_SHIFT];
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page_offset = ctx->offset % PAGE_SIZE;
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element = &ctx->elements[ctx->num_elements];
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while (data_len){
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page_remainder = PAGE_SIZE - page_offset;
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if (page_remainder < data_len){
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qeth_eddp_copy_data_tcp(page + page_offset, eddp,
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page_remainder, &hcsum);
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element->length += page_remainder;
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if (first_lap)
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element->flags = SBAL_FLAGS_FIRST_FRAG;
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else
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element->flags = SBAL_FLAGS_MIDDLE_FRAG;
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ctx->num_elements++;
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element++;
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data_len -= page_remainder;
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ctx->offset += page_remainder;
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page = ctx->pages[ctx->offset >> PAGE_SHIFT];
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page_offset = 0;
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element->addr = page + page_offset;
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} else {
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qeth_eddp_copy_data_tcp(page + page_offset, eddp,
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data_len, &hcsum);
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element->length += data_len;
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if (!first_lap)
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element->flags = SBAL_FLAGS_LAST_FRAG;
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ctx->num_elements++;
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ctx->offset += data_len;
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data_len = 0;
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}
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first_lap = 0;
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}
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((struct tcphdr *)eddp->th_in_ctx)->check = csum_fold(hcsum);
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}
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static inline u32
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qeth_eddp_check_tcp4_hdr(struct qeth_eddp_data *eddp, int data_len)
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{
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u32 phcsum; /* pseudo header checksum */
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QETH_DBF_TEXT(trace, 5, "eddpckt4");
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eddp->th.tcp.h.check = 0;
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/* compute pseudo header checksum */
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phcsum = csum_tcpudp_nofold(eddp->nh.ip4.h.saddr, eddp->nh.ip4.h.daddr,
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eddp->thl + data_len, IPPROTO_TCP, 0);
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/* compute checksum of tcp header */
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return csum_partial((u8 *)&eddp->th, eddp->thl, phcsum);
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}
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static inline u32
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qeth_eddp_check_tcp6_hdr(struct qeth_eddp_data *eddp, int data_len)
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{
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u32 proto;
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u32 phcsum; /* pseudo header checksum */
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QETH_DBF_TEXT(trace, 5, "eddpckt6");
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eddp->th.tcp.h.check = 0;
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/* compute pseudo header checksum */
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phcsum = csum_partial((u8 *)&eddp->nh.ip6.h.saddr,
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sizeof(struct in6_addr), 0);
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phcsum = csum_partial((u8 *)&eddp->nh.ip6.h.daddr,
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sizeof(struct in6_addr), phcsum);
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proto = htonl(IPPROTO_TCP);
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phcsum = csum_partial((u8 *)&proto, sizeof(u32), phcsum);
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return phcsum;
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}
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static inline struct qeth_eddp_data *
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qeth_eddp_create_eddp_data(struct qeth_hdr *qh, u8 *nh, u8 nhl, u8 *th, u8 thl)
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{
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struct qeth_eddp_data *eddp;
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QETH_DBF_TEXT(trace, 5, "eddpcrda");
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eddp = kmalloc(sizeof(struct qeth_eddp_data), GFP_ATOMIC);
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if (eddp){
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memset(eddp, 0, sizeof(struct qeth_eddp_data));
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eddp->nhl = nhl;
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eddp->thl = thl;
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memcpy(&eddp->qh, qh, sizeof(struct qeth_hdr));
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memcpy(&eddp->nh, nh, nhl);
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memcpy(&eddp->th, th, thl);
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eddp->frag = -1; /* initially we're in skb->data */
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}
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return eddp;
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}
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static inline void
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__qeth_eddp_fill_context_tcp(struct qeth_eddp_context *ctx,
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struct qeth_eddp_data *eddp)
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{
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struct tcphdr *tcph;
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int data_len;
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u32 hcsum;
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QETH_DBF_TEXT(trace, 5, "eddpftcp");
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eddp->skb_offset = sizeof(struct qeth_hdr) + eddp->nhl + eddp->thl;
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tcph = eddp->skb->h.th;
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while (eddp->skb_offset < eddp->skb->len) {
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data_len = min((int)skb_shinfo(eddp->skb)->tso_size,
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(int)(eddp->skb->len - eddp->skb_offset));
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/* prepare qdio hdr */
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if (eddp->qh.hdr.l2.id == QETH_HEADER_TYPE_LAYER2){
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eddp->qh.hdr.l2.pkt_length = data_len + ETH_HLEN +
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eddp->nhl + eddp->thl -
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sizeof(struct qeth_hdr);
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#ifdef CONFIG_QETH_VLAN
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if (eddp->mac.h_proto == __constant_htons(ETH_P_8021Q))
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eddp->qh.hdr.l2.pkt_length += VLAN_HLEN;
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#endif /* CONFIG_QETH_VLAN */
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} else
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eddp->qh.hdr.l3.length = data_len + eddp->nhl +
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eddp->thl;
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/* prepare ip hdr */
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if (eddp->skb->protocol == ETH_P_IP){
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eddp->nh.ip4.h.tot_len = data_len + eddp->nhl +
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eddp->thl;
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eddp->nh.ip4.h.check = 0;
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eddp->nh.ip4.h.check =
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ip_fast_csum((u8 *)&eddp->nh.ip4.h,
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eddp->nh.ip4.h.ihl);
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} else
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eddp->nh.ip6.h.payload_len = data_len + eddp->thl;
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/* prepare tcp hdr */
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if (data_len == (eddp->skb->len - eddp->skb_offset)){
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/* last segment -> set FIN and PSH flags */
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eddp->th.tcp.h.fin = tcph->fin;
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eddp->th.tcp.h.psh = tcph->psh;
|
|
}
|
|
if (eddp->skb->protocol == ETH_P_IP)
|
|
hcsum = qeth_eddp_check_tcp4_hdr(eddp, data_len);
|
|
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_data_tcp(ctx, eddp, data_len, hcsum);
|
|
if (eddp->skb_offset >= eddp->skb->len)
|
|
break;
|
|
/* prepare headers for next round */
|
|
if (eddp->skb->protocol == ETH_P_IP)
|
|
eddp->nh.ip4.h.id++;
|
|
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)
|
|
eddp = qeth_eddp_create_eddp_data(qhdr, (u8 *)skb->nh.iph,
|
|
skb->nh.iph->ihl*4,
|
|
(u8 *)skb->h.th, skb->h.th->doff*4);
|
|
else
|
|
eddp = qeth_eddp_create_eddp_data(qhdr, (u8 *)skb->nh.ipv6h,
|
|
sizeof(struct ipv6hdr),
|
|
(u8 *)skb->h.th, skb->h.th->doff*4);
|
|
|
|
if (eddp == NULL) {
|
|
QETH_DBF_TEXT(trace, 2, "eddpfcnm");
|
|
return -ENOMEM;
|
|
}
|
|
if (qhdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) {
|
|
memcpy(&eddp->mac, eth_hdr(skb), ETH_HLEN);
|
|
#ifdef CONFIG_QETH_VLAN
|
|
if (eddp->mac.h_proto == __constant_htons(ETH_P_8021Q)) {
|
|
eddp->vlan[0] = __constant_htons(skb->protocol);
|
|
eddp->vlan[1] = htons(vlan_tx_tag_get(skb));
|
|
}
|
|
#endif /* CONFIG_QETH_VLAN */
|
|
}
|
|
/* the next flags will only be set on the last segment */
|
|
eddp->th.tcp.h.fin = 0;
|
|
eddp->th.tcp.h.psh = 0;
|
|
eddp->skb = skb;
|
|
/* begin segmentation and fill context */
|
|
__qeth_eddp_fill_context_tcp(ctx, eddp);
|
|
kfree(eddp);
|
|
return 0;
|
|
}
|
|
|
|
static inline void
|
|
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);
|
|
if (skbs_per_page > 1){
|
|
ctx->num_pages = (skb_shinfo(skb)->tso_segs + 1) /
|
|
skbs_per_page + 1;
|
|
ctx->elements_per_skb = 1;
|
|
} else {
|
|
/* no -> how many elements per skb? */
|
|
ctx->elements_per_skb = (skb_shinfo(skb)->tso_size + hdr_len +
|
|
PAGE_SIZE) >> PAGE_SHIFT;
|
|
ctx->num_pages = ctx->elements_per_skb *
|
|
(skb_shinfo(skb)->tso_segs + 1);
|
|
}
|
|
ctx->num_elements = ctx->elements_per_skb *
|
|
(skb_shinfo(skb)->tso_segs + 1);
|
|
}
|
|
|
|
static inline struct qeth_eddp_context *
|
|
qeth_eddp_create_context_generic(struct qeth_card *card, struct sk_buff *skb,
|
|
int hdr_len)
|
|
{
|
|
struct qeth_eddp_context *ctx = NULL;
|
|
u8 *addr;
|
|
int i;
|
|
|
|
QETH_DBF_TEXT(trace, 5, "creddpcg");
|
|
/* create the context and allocate pages */
|
|
ctx = kmalloc(sizeof(struct qeth_eddp_context), GFP_ATOMIC);
|
|
if (ctx == NULL){
|
|
QETH_DBF_TEXT(trace, 2, "ceddpcn1");
|
|
return NULL;
|
|
}
|
|
memset(ctx, 0, sizeof(struct qeth_eddp_context));
|
|
ctx->type = QETH_LARGE_SEND_EDDP;
|
|
qeth_eddp_calc_num_pages(ctx, skb, hdr_len);
|
|
if (ctx->elements_per_skb > QETH_MAX_BUFFER_ELEMENTS(card)){
|
|
QETH_DBF_TEXT(trace, 2, "ceddpcis");
|
|
kfree(ctx);
|
|
return NULL;
|
|
}
|
|
ctx->pages = kmalloc(ctx->num_pages * sizeof(u8 *), GFP_ATOMIC);
|
|
if (ctx->pages == NULL){
|
|
QETH_DBF_TEXT(trace, 2, "ceddpcn2");
|
|
kfree(ctx);
|
|
return NULL;
|
|
}
|
|
memset(ctx->pages, 0, ctx->num_pages * sizeof(u8 *));
|
|
for (i = 0; i < ctx->num_pages; ++i){
|
|
addr = (u8 *)__get_free_page(GFP_ATOMIC);
|
|
if (addr == NULL){
|
|
QETH_DBF_TEXT(trace, 2, "ceddpcn3");
|
|
ctx->num_pages = i;
|
|
qeth_eddp_free_context(ctx);
|
|
return NULL;
|
|
}
|
|
memset(addr, 0, PAGE_SIZE);
|
|
ctx->pages[i] = addr;
|
|
}
|
|
ctx->elements = kmalloc(ctx->num_elements *
|
|
sizeof(struct qeth_eddp_element), GFP_ATOMIC);
|
|
if (ctx->elements == NULL){
|
|
QETH_DBF_TEXT(trace, 2, "ceddpcn4");
|
|
qeth_eddp_free_context(ctx);
|
|
return NULL;
|
|
}
|
|
memset(ctx->elements, 0,
|
|
ctx->num_elements * sizeof(struct qeth_eddp_element));
|
|
/* reset num_elements; will be incremented again in fill_buffer to
|
|
* reflect number of actually used elements */
|
|
ctx->num_elements = 0;
|
|
return ctx;
|
|
}
|
|
|
|
static inline struct qeth_eddp_context *
|
|
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,
|
|
sizeof(struct qeth_hdr) + skb->nh.iph->ihl*4 +
|
|
skb->h.th->doff*4);
|
|
else if (skb->protocol == ETH_P_IPV6)
|
|
ctx = qeth_eddp_create_context_generic(card, skb,
|
|
sizeof(struct qeth_hdr) + sizeof(struct ipv6hdr) +
|
|
skb->h.th->doff*4);
|
|
else
|
|
QETH_DBF_TEXT(trace, 2, "cetcpinv");
|
|
|
|
if (ctx == NULL) {
|
|
QETH_DBF_TEXT(trace, 2, "creddpnl");
|
|
return NULL;
|
|
}
|
|
if (qeth_eddp_fill_context_tcp(ctx, skb, qhdr)){
|
|
QETH_DBF_TEXT(trace, 2, "ceddptfe");
|
|
qeth_eddp_free_context(ctx);
|
|
return NULL;
|
|
}
|
|
atomic_set(&ctx->refcnt, 1);
|
|
return ctx;
|
|
}
|
|
|
|
struct qeth_eddp_context *
|
|
qeth_eddp_create_context(struct qeth_card *card, struct sk_buff *skb,
|
|
struct qeth_hdr *qhdr)
|
|
{
|
|
QETH_DBF_TEXT(trace, 5, "creddpc");
|
|
switch (skb->sk->sk_protocol){
|
|
case IPPROTO_TCP:
|
|
return qeth_eddp_create_context_tcp(card, skb, qhdr);
|
|
default:
|
|
QETH_DBF_TEXT(trace, 2, "eddpinvp");
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
|