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Date: Fri, 13 May 2011 09:38:07 +0200 From: Michał Mirosław <mirq@...e.qmqm.pl> To: frank.blaschka@...ibm.com Cc: davem@...emloft.net, netdev@...r.kernel.org, linux-s390@...r.kernel.org Subject: Re: [patch 1/9] [PATCH] qeth: convert to hw_features part 2 On Fri, May 13, 2011 at 06:45:01AM +0200, frank.blaschka@...ibm.com wrote: > From: Frank Blaschka <frank.blaschka@...ibm.com> > Set rx csum default to hw checksumming again. > Remove sysfs interface for rx csum (checksumming) and TSO (large_send). > With the new hw_features it does not work to keep the old sysfs > interface in parallel. Convert options.checksum_type to new hw_features. Please see following patch (replacing qeth_l3_main.c part of your patch) for an illustration of my earlier comments. Best Regards, Michał Mirosław diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c index 1496661..9b8ce44 100644 --- a/drivers/s390/net/qeth_l3_main.c +++ b/drivers/s390/net/qeth_l3_main.c @@ -1445,70 +1445,37 @@ static int qeth_l3_send_checksum_command(struct qeth_card *card) return 0; } -int qeth_l3_set_rx_csum(struct qeth_card *card, - enum qeth_checksum_types csum_type) +static int qeth_l3_set_rx_csum(struct qeth_card *card, int on) { - int rc = 0; + int rc; - if (card->options.checksum_type == HW_CHECKSUMMING) { - if ((csum_type != HW_CHECKSUMMING) && - (card->state != CARD_STATE_DOWN)) { - rc = qeth_l3_send_simple_setassparms(card, - IPA_INBOUND_CHECKSUM, IPA_CMD_ASS_STOP, 0); - if (rc) - return -EIO; - } - card->dev->features |= NETIF_F_RXCSUM; - } else { - if (csum_type == HW_CHECKSUMMING) { - if (card->state != CARD_STATE_DOWN) { - if (!qeth_is_supported(card, - IPA_INBOUND_CHECKSUM)) - return -EPERM; - rc = qeth_l3_send_checksum_command(card); - if (rc) - return -EIO; - } - } - card->dev->features &= ~NETIF_F_RXCSUM; + if (on) { + rc = qeth_l3_send_checksum_command(card); + if (rc) + return -EIO; + } else + rc = qeth_l3_send_simple_setassparms(card, + IPA_INBOUND_CHECKSUM, IPA_CMD_ASS_STOP, 0); + if (rc) + return -EIO; } - card->options.checksum_type = csum_type; - return rc; + + return 0; } static int qeth_l3_start_ipa_checksum(struct qeth_card *card) { - int rc = 0; - QETH_CARD_TEXT(card, 3, "strtcsum"); - if (card->options.checksum_type == NO_CHECKSUMMING) { - dev_info(&card->gdev->dev, - "Using no checksumming on %s.\n", - QETH_CARD_IFNAME(card)); - return 0; - } - if (card->options.checksum_type == SW_CHECKSUMMING) { - dev_info(&card->gdev->dev, - "Using SW checksumming on %s.\n", - QETH_CARD_IFNAME(card)); - return 0; - } - if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM)) { - dev_info(&card->gdev->dev, - "Inbound HW Checksumming not " - "supported on %s,\ncontinuing " - "using Inbound SW Checksumming\n", - QETH_CARD_IFNAME(card)); - card->options.checksum_type = SW_CHECKSUMMING; - return 0; + if (card->dev->features & NETIF_F_RXCSUM) { + rtnl_lock(); + /* force set_features call */ + card->dev->features &= ~NETIF_F_RXCSUM; + netdev_update_features(card->dev); + rtnl_unlock(); } - rc = qeth_l3_send_checksum_command(card); - if (!rc) - dev_info(&card->gdev->dev, - "HW Checksumming (inbound) enabled\n"); - return rc; + return 0; } static int qeth_l3_start_ipa_tx_checksum(struct qeth_card *card) @@ -2037,14 +2004,7 @@ static inline int qeth_l3_rebuild_skb(struct qeth_card *card, is_vlan = 1; } - switch (card->options.checksum_type) { - case SW_CHECKSUMMING: - skb->ip_summed = CHECKSUM_NONE; - break; - case NO_CHECKSUMMING: - skb->ip_summed = CHECKSUM_UNNECESSARY; - break; - case HW_CHECKSUMMING: + if (card->dev->features & NETIF_F_RXCSUM) { if ((hdr->hdr.l3.ext_flags & (QETH_HDR_EXT_CSUM_HDR_REQ | QETH_HDR_EXT_CSUM_TRANSP_REQ)) == @@ -2053,7 +2013,8 @@ static inline int qeth_l3_rebuild_skb(struct qeth_card *card, skb->ip_summed = CHECKSUM_UNNECESSARY; else skb->ip_summed = CHECKSUM_NONE; - } + } else + skb->ip_summed = CHECKSUM_NONE; return is_vlan; } @@ -3235,20 +3196,20 @@ static u32 qeth_l3_fix_features(struct net_device *dev, u32 features) static int qeth_l3_set_features(struct net_device *dev, u32 features) { - enum qeth_checksum_types csum_type; struct qeth_card *card = dev->ml_priv; u32 changed = dev->features ^ features; + int on; if (!(changed & NETIF_F_RXCSUM)) return 0; - if (features & NETIF_F_RXCSUM) - csum_type = HW_CHECKSUMMING; - else - csum_type = SW_CHECKSUMMING; + if (card->state == CARD_STATE_DOWN) + return 0; + /* commit other changes in case of error */ dev->features = features ^ NETIF_F_RXCSUM; - return qeth_l3_set_rx_csum(card, csum_type); + + return qeth_l3_set_rx_csum(card, features & NETIF_F_RXCSUM); } static const struct ethtool_ops qeth_l3_ethtool_ops = { @@ -3342,6 +3303,12 @@ static int qeth_l3_setup_netdev(struct qeth_card *card) if (!(card->info.unique_id & UNIQUE_ID_NOT_BY_CARD)) card->dev->dev_id = card->info.unique_id & 0xffff; + if (!card->info.guestlan) { + card->dev->hw_features = NETIF_F_SG | + NETIF_F_RXCSUM | NETIF_F_IP_CSUM | + NETIF_F_TSO; + card->dev->features = NETIF_F_RXCSUM; + } } } else if (card->info.type == QETH_CARD_TYPE_IQD) { card->dev = alloc_netdev(0, "hsi%d", ether_setup); @@ -3357,8 +3324,6 @@ static int qeth_l3_setup_netdev(struct qeth_card *card) card->dev->watchdog_timeo = QETH_TX_TIMEOUT; card->dev->mtu = card->info.initial_mtu; SET_ETHTOOL_OPS(card->dev, &qeth_l3_ethtool_ops); - card->dev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM | - NETIF_F_IP_CSUM | NETIF_F_TSO; card->dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER; @@ -3382,9 +3347,6 @@ static int qeth_l3_probe_device(struct ccwgroup_device *gdev) card->discipline.output_handler = (qdio_handler_t *) qeth_qdio_output_handler; card->discipline.recover = qeth_l3_recover; - if ((card->info.type == QETH_CARD_TYPE_OSD) || - (card->info.type == QETH_CARD_TYPE_OSX)) - card->options.checksum_type = HW_CHECKSUMMING; return 0; } -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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