diff options
Diffstat (limited to 'drivers/s390/net/qeth_l2_main.c')
-rw-r--r-- | drivers/s390/net/qeth_l2_main.c | 116 |
1 files changed, 42 insertions, 74 deletions
diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c index b5e38531733f..12858ffa28cf 100644 --- a/drivers/s390/net/qeth_l2_main.c +++ b/drivers/s390/net/qeth_l2_main.c @@ -193,15 +193,21 @@ static int qeth_l2_get_cast_type(struct qeth_card *card, struct sk_buff *skb) return RTN_UNICAST; } -static void qeth_l2_fill_header(struct qeth_hdr *hdr, struct sk_buff *skb, - int cast_type, unsigned int data_len) +static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr, + struct sk_buff *skb, int ipv, int cast_type, + unsigned int data_len) { struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb); - memset(hdr, 0, sizeof(struct qeth_hdr)); hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2; hdr->hdr.l2.pkt_length = data_len; + if (skb->ip_summed == CHECKSUM_PARTIAL) { + qeth_tx_csum(skb, &hdr->hdr.l2.flags[1], ipv); + if (card->options.performance_stats) + card->perf_stats.tx_csum++; + } + /* set byte byte 3 to casting flags */ if (cast_type == RTN_MULTICAST) hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST; @@ -641,84 +647,43 @@ static void qeth_l2_set_rx_mode(struct net_device *dev) qeth_promisc_to_bridge(card); } -static int qeth_l2_xmit(struct qeth_card *card, struct sk_buff *skb, - struct qeth_qdio_out_q *queue, int cast_type, int ipv) +static int qeth_l2_xmit_osn(struct qeth_card *card, struct sk_buff *skb, + struct qeth_qdio_out_q *queue) { - const unsigned int proto_len = IS_IQD(card) ? ETH_HLEN : 0; - const unsigned int hw_hdr_len = sizeof(struct qeth_hdr); - unsigned int frame_len = skb->len; - unsigned int data_offset = 0; - struct qeth_hdr *hdr = NULL; + struct qeth_hdr *hdr = (struct qeth_hdr *)skb->data; + addr_t end = (addr_t)(skb->data + sizeof(*hdr)); + addr_t start = (addr_t)skb->data; + unsigned int elements = 0; unsigned int hd_len = 0; - unsigned int elements; - int push_len, rc; - bool is_sg; + int rc; - rc = skb_cow_head(skb, hw_hdr_len); - if (rc) - return rc; + if (skb->protocol == htons(ETH_P_IPV6)) + return -EPROTONOSUPPORT; - push_len = qeth_add_hw_header(card, skb, &hdr, hw_hdr_len, proto_len, - &elements); - if (push_len < 0) - return push_len; - if (!push_len) { - /* HW header needs its own buffer element. */ - hd_len = hw_hdr_len + proto_len; - data_offset = proto_len; - } - qeth_l2_fill_header(hdr, skb, cast_type, frame_len); - if (skb->ip_summed == CHECKSUM_PARTIAL) { - qeth_tx_csum(skb, &hdr->hdr.l2.flags[1], ipv); - if (card->options.performance_stats) - card->perf_stats.tx_csum++; + if (qeth_get_elements_for_range(start, end) > 1) { + /* Misaligned HW header, move it to its own buffer element. */ + hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC); + if (!hdr) + return -ENOMEM; + hd_len = sizeof(*hdr); + skb_copy_from_linear_data(skb, (char *)hdr, hd_len); + elements++; } - is_sg = skb_is_nonlinear(skb); - if (IS_IQD(card)) { - rc = qeth_do_send_packet_fast(queue, skb, hdr, data_offset, - hd_len); - } else { - /* TODO: drop skb_orphan() once TX completion is fast enough */ - skb_orphan(skb); - rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset, - hd_len, elements); + elements += qeth_count_elements(skb, hd_len); + if (elements > QETH_MAX_BUFFER_ELEMENTS(card)) { + rc = -E2BIG; + goto out; } - if (!rc) { - if (card->options.performance_stats) { - card->perf_stats.buf_elements_sent += elements; - if (is_sg) - card->perf_stats.sg_skbs_sent++; - } - } else { - if (!push_len) - kmem_cache_free(qeth_core_header_cache, hdr); - if (rc == -EBUSY) - /* roll back to ETH header */ - skb_pull(skb, push_len); - } + rc = qeth_do_send_packet(card, queue, skb, hdr, hd_len, hd_len, + elements); +out: + if (rc && hd_len) + kmem_cache_free(qeth_core_header_cache, hdr); return rc; } -static int qeth_l2_xmit_osn(struct qeth_card *card, struct sk_buff *skb, - struct qeth_qdio_out_q *queue) -{ - unsigned int elements; - struct qeth_hdr *hdr; - - if (skb->protocol == htons(ETH_P_IPV6)) - return -EPROTONOSUPPORT; - - hdr = (struct qeth_hdr *)skb->data; - elements = qeth_get_elements_no(card, skb, 0, 0); - if (!elements) - return -E2BIG; - if (qeth_hdr_chk_and_bounce(skb, &hdr, sizeof(*hdr))) - return -EINVAL; - return qeth_do_send_packet(card, queue, skb, hdr, 0, 0, elements); -} - static netdev_tx_t qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) { @@ -745,7 +710,8 @@ static netdev_tx_t qeth_l2_hard_start_xmit(struct sk_buff *skb, if (IS_OSN(card)) rc = qeth_l2_xmit_osn(card, skb, queue); else - rc = qeth_l2_xmit(card, skb, queue, cast_type, ipv); + rc = qeth_xmit(card, skb, queue, ipv, cast_type, + qeth_l2_fill_header); if (!rc) { card->stats.tx_packets++; @@ -789,7 +755,10 @@ static int __qeth_l2_open(struct net_device *dev) if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) { napi_enable(&card->napi); + local_bh_disable(); napi_schedule(&card->napi); + /* kick-start the NAPI softirq: */ + local_bh_enable(); } else rc = -EIO; return rc; @@ -1240,7 +1209,6 @@ static int qeth_osn_send_control_data(struct qeth_card *card, int len, struct qeth_cmd_buffer *iob) { struct qeth_channel *channel = iob->channel; - unsigned long flags; int rc = 0; QETH_CARD_TEXT(card, 5, "osndctrd"); @@ -1249,10 +1217,10 @@ static int qeth_osn_send_control_data(struct qeth_card *card, int len, atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0); qeth_prepare_control_data(card, len, iob); QETH_CARD_TEXT(card, 6, "osnoirqp"); - spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); + spin_lock_irq(get_ccwdev_lock(channel->ccwdev)); rc = ccw_device_start_timeout(channel->ccwdev, channel->ccw, (addr_t) iob, 0, 0, QETH_IPA_TIMEOUT); - spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); + spin_unlock_irq(get_ccwdev_lock(channel->ccwdev)); if (rc) { QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: " "ccw_device_start rc = %i\n", rc); |