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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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![Paul Gortmaker](/assets/img/avatar_default.png)
After discovering that wide use of prefetch on modern CPUs could be a net loss instead of a win, net drivers which were relying on the implicit inclusion of prefetch.h via the list headers showed up in the resulting cleanup fallout. Give them an explicit include via the following $0.02 script. ========================================= #!/bin/bash MANUAL="" for i in `git grep -l 'prefetch(.*)' .` ; do grep -q '<linux/prefetch.h>' $i if [ $? = 0 ] ; then continue fi ( echo '?^#include <linux/?a' echo '#include <linux/prefetch.h>' echo . echo w echo q ) | ed -s $i > /dev/null 2>&1 if [ $? != 0 ]; then echo $i needs manual fixup MANUAL="$i $MANUAL" fi done echo ------------------- 8\<---------------------- echo vi $MANUAL ========================================= Signed-off-by: Paul <paul.gortmaker@windriver.com> [ Fixed up some incorrect #include placements, and added some non-network drivers and the fib_trie.c case - Linus ] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2462 lines
60 KiB
C
2462 lines
60 KiB
C
/*
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* Copyright 2008-2010 Cisco Systems, Inc. All rights reserved.
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* Copyright 2007 Nuova Systems, Inc. All rights reserved.
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*
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* This program is free software; you may redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/workqueue.h>
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#include <linux/pci.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/if_ether.h>
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#include <linux/if_vlan.h>
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#include <linux/ethtool.h>
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#include <linux/in.h>
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#include <linux/ip.h>
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#include <linux/ipv6.h>
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#include <linux/tcp.h>
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#include <linux/rtnetlink.h>
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#include <linux/prefetch.h>
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#include <net/ip6_checksum.h>
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#include "cq_enet_desc.h"
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#include "vnic_dev.h"
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#include "vnic_intr.h"
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#include "vnic_stats.h"
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#include "vnic_vic.h"
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#include "enic_res.h"
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#include "enic.h"
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#include "enic_dev.h"
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#include "enic_pp.h"
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#define ENIC_NOTIFY_TIMER_PERIOD (2 * HZ)
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#define WQ_ENET_MAX_DESC_LEN (1 << WQ_ENET_LEN_BITS)
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#define MAX_TSO (1 << 16)
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#define ENIC_DESC_MAX_SPLITS (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1)
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#define PCI_DEVICE_ID_CISCO_VIC_ENET 0x0043 /* ethernet vnic */
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#define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN 0x0044 /* enet dynamic vnic */
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/* Supported devices */
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static DEFINE_PCI_DEVICE_TABLE(enic_id_table) = {
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{ PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) },
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{ PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) },
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{ 0, } /* end of table */
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};
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MODULE_DESCRIPTION(DRV_DESCRIPTION);
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MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
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MODULE_LICENSE("GPL");
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MODULE_VERSION(DRV_VERSION);
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MODULE_DEVICE_TABLE(pci, enic_id_table);
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struct enic_stat {
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char name[ETH_GSTRING_LEN];
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unsigned int offset;
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};
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#define ENIC_TX_STAT(stat) \
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{ .name = #stat, .offset = offsetof(struct vnic_tx_stats, stat) / 8 }
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#define ENIC_RX_STAT(stat) \
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{ .name = #stat, .offset = offsetof(struct vnic_rx_stats, stat) / 8 }
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static const struct enic_stat enic_tx_stats[] = {
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ENIC_TX_STAT(tx_frames_ok),
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ENIC_TX_STAT(tx_unicast_frames_ok),
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ENIC_TX_STAT(tx_multicast_frames_ok),
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ENIC_TX_STAT(tx_broadcast_frames_ok),
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ENIC_TX_STAT(tx_bytes_ok),
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ENIC_TX_STAT(tx_unicast_bytes_ok),
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ENIC_TX_STAT(tx_multicast_bytes_ok),
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ENIC_TX_STAT(tx_broadcast_bytes_ok),
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ENIC_TX_STAT(tx_drops),
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ENIC_TX_STAT(tx_errors),
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ENIC_TX_STAT(tx_tso),
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};
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static const struct enic_stat enic_rx_stats[] = {
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ENIC_RX_STAT(rx_frames_ok),
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ENIC_RX_STAT(rx_frames_total),
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ENIC_RX_STAT(rx_unicast_frames_ok),
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ENIC_RX_STAT(rx_multicast_frames_ok),
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ENIC_RX_STAT(rx_broadcast_frames_ok),
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ENIC_RX_STAT(rx_bytes_ok),
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ENIC_RX_STAT(rx_unicast_bytes_ok),
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ENIC_RX_STAT(rx_multicast_bytes_ok),
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ENIC_RX_STAT(rx_broadcast_bytes_ok),
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ENIC_RX_STAT(rx_drop),
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ENIC_RX_STAT(rx_no_bufs),
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ENIC_RX_STAT(rx_errors),
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ENIC_RX_STAT(rx_rss),
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ENIC_RX_STAT(rx_crc_errors),
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ENIC_RX_STAT(rx_frames_64),
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ENIC_RX_STAT(rx_frames_127),
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ENIC_RX_STAT(rx_frames_255),
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ENIC_RX_STAT(rx_frames_511),
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ENIC_RX_STAT(rx_frames_1023),
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ENIC_RX_STAT(rx_frames_1518),
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ENIC_RX_STAT(rx_frames_to_max),
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};
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static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats);
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static const unsigned int enic_n_rx_stats = ARRAY_SIZE(enic_rx_stats);
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static int enic_is_dynamic(struct enic *enic)
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{
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return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN;
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}
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static inline unsigned int enic_cq_rq(struct enic *enic, unsigned int rq)
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{
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return rq;
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}
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static inline unsigned int enic_cq_wq(struct enic *enic, unsigned int wq)
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{
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return enic->rq_count + wq;
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}
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static inline unsigned int enic_legacy_io_intr(void)
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{
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return 0;
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}
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static inline unsigned int enic_legacy_err_intr(void)
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{
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return 1;
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}
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static inline unsigned int enic_legacy_notify_intr(void)
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{
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return 2;
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}
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static inline unsigned int enic_msix_rq_intr(struct enic *enic, unsigned int rq)
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{
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return rq;
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}
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static inline unsigned int enic_msix_wq_intr(struct enic *enic, unsigned int wq)
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{
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return enic->rq_count + wq;
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}
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static inline unsigned int enic_msix_err_intr(struct enic *enic)
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{
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return enic->rq_count + enic->wq_count;
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}
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static inline unsigned int enic_msix_notify_intr(struct enic *enic)
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{
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return enic->rq_count + enic->wq_count + 1;
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}
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static int enic_get_settings(struct net_device *netdev,
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struct ethtool_cmd *ecmd)
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{
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struct enic *enic = netdev_priv(netdev);
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ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
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ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE);
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ecmd->port = PORT_FIBRE;
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ecmd->transceiver = XCVR_EXTERNAL;
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if (netif_carrier_ok(netdev)) {
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ethtool_cmd_speed_set(ecmd, vnic_dev_port_speed(enic->vdev));
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ecmd->duplex = DUPLEX_FULL;
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} else {
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ethtool_cmd_speed_set(ecmd, -1);
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ecmd->duplex = -1;
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}
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ecmd->autoneg = AUTONEG_DISABLE;
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return 0;
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}
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static void enic_get_drvinfo(struct net_device *netdev,
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struct ethtool_drvinfo *drvinfo)
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{
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struct enic *enic = netdev_priv(netdev);
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struct vnic_devcmd_fw_info *fw_info;
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enic_dev_fw_info(enic, &fw_info);
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strncpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
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strncpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
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strncpy(drvinfo->fw_version, fw_info->fw_version,
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sizeof(drvinfo->fw_version));
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strncpy(drvinfo->bus_info, pci_name(enic->pdev),
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sizeof(drvinfo->bus_info));
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}
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static void enic_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
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{
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unsigned int i;
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switch (stringset) {
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case ETH_SS_STATS:
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for (i = 0; i < enic_n_tx_stats; i++) {
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memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN);
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data += ETH_GSTRING_LEN;
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}
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for (i = 0; i < enic_n_rx_stats; i++) {
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memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN);
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data += ETH_GSTRING_LEN;
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}
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break;
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}
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}
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static int enic_get_sset_count(struct net_device *netdev, int sset)
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{
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switch (sset) {
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case ETH_SS_STATS:
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return enic_n_tx_stats + enic_n_rx_stats;
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default:
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return -EOPNOTSUPP;
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}
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}
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static void enic_get_ethtool_stats(struct net_device *netdev,
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struct ethtool_stats *stats, u64 *data)
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{
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struct enic *enic = netdev_priv(netdev);
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struct vnic_stats *vstats;
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unsigned int i;
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enic_dev_stats_dump(enic, &vstats);
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for (i = 0; i < enic_n_tx_stats; i++)
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*(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].offset];
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for (i = 0; i < enic_n_rx_stats; i++)
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*(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].offset];
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}
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static u32 enic_get_msglevel(struct net_device *netdev)
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{
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struct enic *enic = netdev_priv(netdev);
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return enic->msg_enable;
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}
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static void enic_set_msglevel(struct net_device *netdev, u32 value)
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{
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struct enic *enic = netdev_priv(netdev);
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enic->msg_enable = value;
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}
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static int enic_get_coalesce(struct net_device *netdev,
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struct ethtool_coalesce *ecmd)
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{
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struct enic *enic = netdev_priv(netdev);
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ecmd->tx_coalesce_usecs = enic->tx_coalesce_usecs;
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ecmd->rx_coalesce_usecs = enic->rx_coalesce_usecs;
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return 0;
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}
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static int enic_set_coalesce(struct net_device *netdev,
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struct ethtool_coalesce *ecmd)
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{
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struct enic *enic = netdev_priv(netdev);
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u32 tx_coalesce_usecs;
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u32 rx_coalesce_usecs;
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unsigned int i, intr;
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tx_coalesce_usecs = min_t(u32,
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INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX),
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ecmd->tx_coalesce_usecs);
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rx_coalesce_usecs = min_t(u32,
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INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX),
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ecmd->rx_coalesce_usecs);
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switch (vnic_dev_get_intr_mode(enic->vdev)) {
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case VNIC_DEV_INTR_MODE_INTX:
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if (tx_coalesce_usecs != rx_coalesce_usecs)
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return -EINVAL;
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intr = enic_legacy_io_intr();
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vnic_intr_coalescing_timer_set(&enic->intr[intr],
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INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
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break;
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case VNIC_DEV_INTR_MODE_MSI:
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if (tx_coalesce_usecs != rx_coalesce_usecs)
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return -EINVAL;
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vnic_intr_coalescing_timer_set(&enic->intr[0],
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INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
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break;
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case VNIC_DEV_INTR_MODE_MSIX:
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for (i = 0; i < enic->wq_count; i++) {
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intr = enic_msix_wq_intr(enic, i);
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vnic_intr_coalescing_timer_set(&enic->intr[intr],
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INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
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}
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for (i = 0; i < enic->rq_count; i++) {
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intr = enic_msix_rq_intr(enic, i);
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vnic_intr_coalescing_timer_set(&enic->intr[intr],
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INTR_COALESCE_USEC_TO_HW(rx_coalesce_usecs));
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}
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break;
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default:
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break;
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}
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enic->tx_coalesce_usecs = tx_coalesce_usecs;
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enic->rx_coalesce_usecs = rx_coalesce_usecs;
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return 0;
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}
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static const struct ethtool_ops enic_ethtool_ops = {
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.get_settings = enic_get_settings,
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.get_drvinfo = enic_get_drvinfo,
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.get_msglevel = enic_get_msglevel,
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.set_msglevel = enic_set_msglevel,
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.get_link = ethtool_op_get_link,
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.get_strings = enic_get_strings,
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.get_sset_count = enic_get_sset_count,
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.get_ethtool_stats = enic_get_ethtool_stats,
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.get_coalesce = enic_get_coalesce,
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.set_coalesce = enic_set_coalesce,
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};
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static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
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{
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struct enic *enic = vnic_dev_priv(wq->vdev);
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if (buf->sop)
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pci_unmap_single(enic->pdev, buf->dma_addr,
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buf->len, PCI_DMA_TODEVICE);
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else
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pci_unmap_page(enic->pdev, buf->dma_addr,
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buf->len, PCI_DMA_TODEVICE);
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if (buf->os_buf)
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dev_kfree_skb_any(buf->os_buf);
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}
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static void enic_wq_free_buf(struct vnic_wq *wq,
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struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
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{
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enic_free_wq_buf(wq, buf);
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}
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static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
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u8 type, u16 q_number, u16 completed_index, void *opaque)
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{
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struct enic *enic = vnic_dev_priv(vdev);
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spin_lock(&enic->wq_lock[q_number]);
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vnic_wq_service(&enic->wq[q_number], cq_desc,
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completed_index, enic_wq_free_buf,
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opaque);
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if (netif_queue_stopped(enic->netdev) &&
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vnic_wq_desc_avail(&enic->wq[q_number]) >=
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(MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS))
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netif_wake_queue(enic->netdev);
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spin_unlock(&enic->wq_lock[q_number]);
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return 0;
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}
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static void enic_log_q_error(struct enic *enic)
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{
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unsigned int i;
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u32 error_status;
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for (i = 0; i < enic->wq_count; i++) {
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error_status = vnic_wq_error_status(&enic->wq[i]);
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if (error_status)
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netdev_err(enic->netdev, "WQ[%d] error_status %d\n",
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i, error_status);
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}
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for (i = 0; i < enic->rq_count; i++) {
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error_status = vnic_rq_error_status(&enic->rq[i]);
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if (error_status)
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netdev_err(enic->netdev, "RQ[%d] error_status %d\n",
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i, error_status);
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}
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}
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static void enic_msglvl_check(struct enic *enic)
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{
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u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
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if (msg_enable != enic->msg_enable) {
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netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n",
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enic->msg_enable, msg_enable);
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enic->msg_enable = msg_enable;
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}
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}
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static void enic_mtu_check(struct enic *enic)
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{
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u32 mtu = vnic_dev_mtu(enic->vdev);
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struct net_device *netdev = enic->netdev;
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if (mtu && mtu != enic->port_mtu) {
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enic->port_mtu = mtu;
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if (mtu < netdev->mtu)
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netdev_warn(netdev,
|
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"interface MTU (%d) set higher "
|
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"than switch port MTU (%d)\n",
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netdev->mtu, mtu);
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}
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}
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static void enic_link_check(struct enic *enic)
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{
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int link_status = vnic_dev_link_status(enic->vdev);
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int carrier_ok = netif_carrier_ok(enic->netdev);
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if (link_status && !carrier_ok) {
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netdev_info(enic->netdev, "Link UP\n");
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netif_carrier_on(enic->netdev);
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} else if (!link_status && carrier_ok) {
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netdev_info(enic->netdev, "Link DOWN\n");
|
|
netif_carrier_off(enic->netdev);
|
|
}
|
|
}
|
|
|
|
static void enic_notify_check(struct enic *enic)
|
|
{
|
|
enic_msglvl_check(enic);
|
|
enic_mtu_check(enic);
|
|
enic_link_check(enic);
|
|
}
|
|
|
|
#define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
|
|
|
|
static irqreturn_t enic_isr_legacy(int irq, void *data)
|
|
{
|
|
struct net_device *netdev = data;
|
|
struct enic *enic = netdev_priv(netdev);
|
|
unsigned int io_intr = enic_legacy_io_intr();
|
|
unsigned int err_intr = enic_legacy_err_intr();
|
|
unsigned int notify_intr = enic_legacy_notify_intr();
|
|
u32 pba;
|
|
|
|
vnic_intr_mask(&enic->intr[io_intr]);
|
|
|
|
pba = vnic_intr_legacy_pba(enic->legacy_pba);
|
|
if (!pba) {
|
|
vnic_intr_unmask(&enic->intr[io_intr]);
|
|
return IRQ_NONE; /* not our interrupt */
|
|
}
|
|
|
|
if (ENIC_TEST_INTR(pba, notify_intr)) {
|
|
vnic_intr_return_all_credits(&enic->intr[notify_intr]);
|
|
enic_notify_check(enic);
|
|
}
|
|
|
|
if (ENIC_TEST_INTR(pba, err_intr)) {
|
|
vnic_intr_return_all_credits(&enic->intr[err_intr]);
|
|
enic_log_q_error(enic);
|
|
/* schedule recovery from WQ/RQ error */
|
|
schedule_work(&enic->reset);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
if (ENIC_TEST_INTR(pba, io_intr)) {
|
|
if (napi_schedule_prep(&enic->napi[0]))
|
|
__napi_schedule(&enic->napi[0]);
|
|
} else {
|
|
vnic_intr_unmask(&enic->intr[io_intr]);
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static irqreturn_t enic_isr_msi(int irq, void *data)
|
|
{
|
|
struct enic *enic = data;
|
|
|
|
/* With MSI, there is no sharing of interrupts, so this is
|
|
* our interrupt and there is no need to ack it. The device
|
|
* is not providing per-vector masking, so the OS will not
|
|
* write to PCI config space to mask/unmask the interrupt.
|
|
* We're using mask_on_assertion for MSI, so the device
|
|
* automatically masks the interrupt when the interrupt is
|
|
* generated. Later, when exiting polling, the interrupt
|
|
* will be unmasked (see enic_poll).
|
|
*
|
|
* Also, the device uses the same PCIe Traffic Class (TC)
|
|
* for Memory Write data and MSI, so there are no ordering
|
|
* issues; the MSI will always arrive at the Root Complex
|
|
* _after_ corresponding Memory Writes (i.e. descriptor
|
|
* writes).
|
|
*/
|
|
|
|
napi_schedule(&enic->napi[0]);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static irqreturn_t enic_isr_msix_rq(int irq, void *data)
|
|
{
|
|
struct napi_struct *napi = data;
|
|
|
|
/* schedule NAPI polling for RQ cleanup */
|
|
napi_schedule(napi);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static irqreturn_t enic_isr_msix_wq(int irq, void *data)
|
|
{
|
|
struct enic *enic = data;
|
|
unsigned int cq = enic_cq_wq(enic, 0);
|
|
unsigned int intr = enic_msix_wq_intr(enic, 0);
|
|
unsigned int wq_work_to_do = -1; /* no limit */
|
|
unsigned int wq_work_done;
|
|
|
|
wq_work_done = vnic_cq_service(&enic->cq[cq],
|
|
wq_work_to_do, enic_wq_service, NULL);
|
|
|
|
vnic_intr_return_credits(&enic->intr[intr],
|
|
wq_work_done,
|
|
1 /* unmask intr */,
|
|
1 /* reset intr timer */);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static irqreturn_t enic_isr_msix_err(int irq, void *data)
|
|
{
|
|
struct enic *enic = data;
|
|
unsigned int intr = enic_msix_err_intr(enic);
|
|
|
|
vnic_intr_return_all_credits(&enic->intr[intr]);
|
|
|
|
enic_log_q_error(enic);
|
|
|
|
/* schedule recovery from WQ/RQ error */
|
|
schedule_work(&enic->reset);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static irqreturn_t enic_isr_msix_notify(int irq, void *data)
|
|
{
|
|
struct enic *enic = data;
|
|
unsigned int intr = enic_msix_notify_intr(enic);
|
|
|
|
vnic_intr_return_all_credits(&enic->intr[intr]);
|
|
enic_notify_check(enic);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static inline void enic_queue_wq_skb_cont(struct enic *enic,
|
|
struct vnic_wq *wq, struct sk_buff *skb,
|
|
unsigned int len_left, int loopback)
|
|
{
|
|
skb_frag_t *frag;
|
|
|
|
/* Queue additional data fragments */
|
|
for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
|
|
len_left -= frag->size;
|
|
enic_queue_wq_desc_cont(wq, skb,
|
|
pci_map_page(enic->pdev, frag->page,
|
|
frag->page_offset, frag->size,
|
|
PCI_DMA_TODEVICE),
|
|
frag->size,
|
|
(len_left == 0), /* EOP? */
|
|
loopback);
|
|
}
|
|
}
|
|
|
|
static inline void enic_queue_wq_skb_vlan(struct enic *enic,
|
|
struct vnic_wq *wq, struct sk_buff *skb,
|
|
int vlan_tag_insert, unsigned int vlan_tag, int loopback)
|
|
{
|
|
unsigned int head_len = skb_headlen(skb);
|
|
unsigned int len_left = skb->len - head_len;
|
|
int eop = (len_left == 0);
|
|
|
|
/* Queue the main skb fragment. The fragments are no larger
|
|
* than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
|
|
* than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
|
|
* per fragment is queued.
|
|
*/
|
|
enic_queue_wq_desc(wq, skb,
|
|
pci_map_single(enic->pdev, skb->data,
|
|
head_len, PCI_DMA_TODEVICE),
|
|
head_len,
|
|
vlan_tag_insert, vlan_tag,
|
|
eop, loopback);
|
|
|
|
if (!eop)
|
|
enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
|
|
}
|
|
|
|
static inline void enic_queue_wq_skb_csum_l4(struct enic *enic,
|
|
struct vnic_wq *wq, struct sk_buff *skb,
|
|
int vlan_tag_insert, unsigned int vlan_tag, int loopback)
|
|
{
|
|
unsigned int head_len = skb_headlen(skb);
|
|
unsigned int len_left = skb->len - head_len;
|
|
unsigned int hdr_len = skb_checksum_start_offset(skb);
|
|
unsigned int csum_offset = hdr_len + skb->csum_offset;
|
|
int eop = (len_left == 0);
|
|
|
|
/* Queue the main skb fragment. The fragments are no larger
|
|
* than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
|
|
* than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
|
|
* per fragment is queued.
|
|
*/
|
|
enic_queue_wq_desc_csum_l4(wq, skb,
|
|
pci_map_single(enic->pdev, skb->data,
|
|
head_len, PCI_DMA_TODEVICE),
|
|
head_len,
|
|
csum_offset,
|
|
hdr_len,
|
|
vlan_tag_insert, vlan_tag,
|
|
eop, loopback);
|
|
|
|
if (!eop)
|
|
enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
|
|
}
|
|
|
|
static inline void enic_queue_wq_skb_tso(struct enic *enic,
|
|
struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss,
|
|
int vlan_tag_insert, unsigned int vlan_tag, int loopback)
|
|
{
|
|
unsigned int frag_len_left = skb_headlen(skb);
|
|
unsigned int len_left = skb->len - frag_len_left;
|
|
unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
|
|
int eop = (len_left == 0);
|
|
unsigned int len;
|
|
dma_addr_t dma_addr;
|
|
unsigned int offset = 0;
|
|
skb_frag_t *frag;
|
|
|
|
/* Preload TCP csum field with IP pseudo hdr calculated
|
|
* with IP length set to zero. HW will later add in length
|
|
* to each TCP segment resulting from the TSO.
|
|
*/
|
|
|
|
if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
|
|
ip_hdr(skb)->check = 0;
|
|
tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
|
|
ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
|
|
} else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) {
|
|
tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
|
|
&ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
|
|
}
|
|
|
|
/* Queue WQ_ENET_MAX_DESC_LEN length descriptors
|
|
* for the main skb fragment
|
|
*/
|
|
while (frag_len_left) {
|
|
len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN);
|
|
dma_addr = pci_map_single(enic->pdev, skb->data + offset,
|
|
len, PCI_DMA_TODEVICE);
|
|
enic_queue_wq_desc_tso(wq, skb,
|
|
dma_addr,
|
|
len,
|
|
mss, hdr_len,
|
|
vlan_tag_insert, vlan_tag,
|
|
eop && (len == frag_len_left), loopback);
|
|
frag_len_left -= len;
|
|
offset += len;
|
|
}
|
|
|
|
if (eop)
|
|
return;
|
|
|
|
/* Queue WQ_ENET_MAX_DESC_LEN length descriptors
|
|
* for additional data fragments
|
|
*/
|
|
for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
|
|
len_left -= frag->size;
|
|
frag_len_left = frag->size;
|
|
offset = frag->page_offset;
|
|
|
|
while (frag_len_left) {
|
|
len = min(frag_len_left,
|
|
(unsigned int)WQ_ENET_MAX_DESC_LEN);
|
|
dma_addr = pci_map_page(enic->pdev, frag->page,
|
|
offset, len,
|
|
PCI_DMA_TODEVICE);
|
|
enic_queue_wq_desc_cont(wq, skb,
|
|
dma_addr,
|
|
len,
|
|
(len_left == 0) &&
|
|
(len == frag_len_left), /* EOP? */
|
|
loopback);
|
|
frag_len_left -= len;
|
|
offset += len;
|
|
}
|
|
}
|
|
}
|
|
|
|
static inline void enic_queue_wq_skb(struct enic *enic,
|
|
struct vnic_wq *wq, struct sk_buff *skb)
|
|
{
|
|
unsigned int mss = skb_shinfo(skb)->gso_size;
|
|
unsigned int vlan_tag = 0;
|
|
int vlan_tag_insert = 0;
|
|
int loopback = 0;
|
|
|
|
if (vlan_tx_tag_present(skb)) {
|
|
/* VLAN tag from trunking driver */
|
|
vlan_tag_insert = 1;
|
|
vlan_tag = vlan_tx_tag_get(skb);
|
|
} else if (enic->loop_enable) {
|
|
vlan_tag = enic->loop_tag;
|
|
loopback = 1;
|
|
}
|
|
|
|
if (mss)
|
|
enic_queue_wq_skb_tso(enic, wq, skb, mss,
|
|
vlan_tag_insert, vlan_tag, loopback);
|
|
else if (skb->ip_summed == CHECKSUM_PARTIAL)
|
|
enic_queue_wq_skb_csum_l4(enic, wq, skb,
|
|
vlan_tag_insert, vlan_tag, loopback);
|
|
else
|
|
enic_queue_wq_skb_vlan(enic, wq, skb,
|
|
vlan_tag_insert, vlan_tag, loopback);
|
|
}
|
|
|
|
/* netif_tx_lock held, process context with BHs disabled, or BH */
|
|
static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
|
|
struct net_device *netdev)
|
|
{
|
|
struct enic *enic = netdev_priv(netdev);
|
|
struct vnic_wq *wq = &enic->wq[0];
|
|
unsigned long flags;
|
|
|
|
if (skb->len <= 0) {
|
|
dev_kfree_skb(skb);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
/* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
|
|
* which is very likely. In the off chance it's going to take
|
|
* more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
|
|
*/
|
|
|
|
if (skb_shinfo(skb)->gso_size == 0 &&
|
|
skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
|
|
skb_linearize(skb)) {
|
|
dev_kfree_skb(skb);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
spin_lock_irqsave(&enic->wq_lock[0], flags);
|
|
|
|
if (vnic_wq_desc_avail(wq) <
|
|
skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) {
|
|
netif_stop_queue(netdev);
|
|
/* This is a hard error, log it */
|
|
netdev_err(netdev, "BUG! Tx ring full when queue awake!\n");
|
|
spin_unlock_irqrestore(&enic->wq_lock[0], flags);
|
|
return NETDEV_TX_BUSY;
|
|
}
|
|
|
|
enic_queue_wq_skb(enic, wq, skb);
|
|
|
|
if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)
|
|
netif_stop_queue(netdev);
|
|
|
|
spin_unlock_irqrestore(&enic->wq_lock[0], flags);
|
|
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
/* dev_base_lock rwlock held, nominally process context */
|
|
static struct net_device_stats *enic_get_stats(struct net_device *netdev)
|
|
{
|
|
struct enic *enic = netdev_priv(netdev);
|
|
struct net_device_stats *net_stats = &netdev->stats;
|
|
struct vnic_stats *stats;
|
|
|
|
enic_dev_stats_dump(enic, &stats);
|
|
|
|
net_stats->tx_packets = stats->tx.tx_frames_ok;
|
|
net_stats->tx_bytes = stats->tx.tx_bytes_ok;
|
|
net_stats->tx_errors = stats->tx.tx_errors;
|
|
net_stats->tx_dropped = stats->tx.tx_drops;
|
|
|
|
net_stats->rx_packets = stats->rx.rx_frames_ok;
|
|
net_stats->rx_bytes = stats->rx.rx_bytes_ok;
|
|
net_stats->rx_errors = stats->rx.rx_errors;
|
|
net_stats->multicast = stats->rx.rx_multicast_frames_ok;
|
|
net_stats->rx_over_errors = enic->rq_truncated_pkts;
|
|
net_stats->rx_crc_errors = enic->rq_bad_fcs;
|
|
net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop;
|
|
|
|
return net_stats;
|
|
}
|
|
|
|
void enic_reset_addr_lists(struct enic *enic)
|
|
{
|
|
enic->mc_count = 0;
|
|
enic->uc_count = 0;
|
|
enic->flags = 0;
|
|
}
|
|
|
|
static int enic_set_mac_addr(struct net_device *netdev, char *addr)
|
|
{
|
|
struct enic *enic = netdev_priv(netdev);
|
|
|
|
if (enic_is_dynamic(enic)) {
|
|
if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr))
|
|
return -EADDRNOTAVAIL;
|
|
} else {
|
|
if (!is_valid_ether_addr(addr))
|
|
return -EADDRNOTAVAIL;
|
|
}
|
|
|
|
memcpy(netdev->dev_addr, addr, netdev->addr_len);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p)
|
|
{
|
|
struct enic *enic = netdev_priv(netdev);
|
|
struct sockaddr *saddr = p;
|
|
char *addr = saddr->sa_data;
|
|
int err;
|
|
|
|
if (netif_running(enic->netdev)) {
|
|
err = enic_dev_del_station_addr(enic);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
err = enic_set_mac_addr(netdev, addr);
|
|
if (err)
|
|
return err;
|
|
|
|
if (netif_running(enic->netdev)) {
|
|
err = enic_dev_add_station_addr(enic);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int enic_set_mac_address(struct net_device *netdev, void *p)
|
|
{
|
|
struct sockaddr *saddr = p;
|
|
char *addr = saddr->sa_data;
|
|
struct enic *enic = netdev_priv(netdev);
|
|
int err;
|
|
|
|
err = enic_dev_del_station_addr(enic);
|
|
if (err)
|
|
return err;
|
|
|
|
err = enic_set_mac_addr(netdev, addr);
|
|
if (err)
|
|
return err;
|
|
|
|
return enic_dev_add_station_addr(enic);
|
|
}
|
|
|
|
static void enic_update_multicast_addr_list(struct enic *enic)
|
|
{
|
|
struct net_device *netdev = enic->netdev;
|
|
struct netdev_hw_addr *ha;
|
|
unsigned int mc_count = netdev_mc_count(netdev);
|
|
u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
|
|
unsigned int i, j;
|
|
|
|
if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS) {
|
|
netdev_warn(netdev, "Registering only %d out of %d "
|
|
"multicast addresses\n",
|
|
ENIC_MULTICAST_PERFECT_FILTERS, mc_count);
|
|
mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
|
|
}
|
|
|
|
/* Is there an easier way? Trying to minimize to
|
|
* calls to add/del multicast addrs. We keep the
|
|
* addrs from the last call in enic->mc_addr and
|
|
* look for changes to add/del.
|
|
*/
|
|
|
|
i = 0;
|
|
netdev_for_each_mc_addr(ha, netdev) {
|
|
if (i == mc_count)
|
|
break;
|
|
memcpy(mc_addr[i++], ha->addr, ETH_ALEN);
|
|
}
|
|
|
|
for (i = 0; i < enic->mc_count; i++) {
|
|
for (j = 0; j < mc_count; j++)
|
|
if (compare_ether_addr(enic->mc_addr[i],
|
|
mc_addr[j]) == 0)
|
|
break;
|
|
if (j == mc_count)
|
|
enic_dev_del_addr(enic, enic->mc_addr[i]);
|
|
}
|
|
|
|
for (i = 0; i < mc_count; i++) {
|
|
for (j = 0; j < enic->mc_count; j++)
|
|
if (compare_ether_addr(mc_addr[i],
|
|
enic->mc_addr[j]) == 0)
|
|
break;
|
|
if (j == enic->mc_count)
|
|
enic_dev_add_addr(enic, mc_addr[i]);
|
|
}
|
|
|
|
/* Save the list to compare against next time
|
|
*/
|
|
|
|
for (i = 0; i < mc_count; i++)
|
|
memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);
|
|
|
|
enic->mc_count = mc_count;
|
|
}
|
|
|
|
static void enic_update_unicast_addr_list(struct enic *enic)
|
|
{
|
|
struct net_device *netdev = enic->netdev;
|
|
struct netdev_hw_addr *ha;
|
|
unsigned int uc_count = netdev_uc_count(netdev);
|
|
u8 uc_addr[ENIC_UNICAST_PERFECT_FILTERS][ETH_ALEN];
|
|
unsigned int i, j;
|
|
|
|
if (uc_count > ENIC_UNICAST_PERFECT_FILTERS) {
|
|
netdev_warn(netdev, "Registering only %d out of %d "
|
|
"unicast addresses\n",
|
|
ENIC_UNICAST_PERFECT_FILTERS, uc_count);
|
|
uc_count = ENIC_UNICAST_PERFECT_FILTERS;
|
|
}
|
|
|
|
/* Is there an easier way? Trying to minimize to
|
|
* calls to add/del unicast addrs. We keep the
|
|
* addrs from the last call in enic->uc_addr and
|
|
* look for changes to add/del.
|
|
*/
|
|
|
|
i = 0;
|
|
netdev_for_each_uc_addr(ha, netdev) {
|
|
if (i == uc_count)
|
|
break;
|
|
memcpy(uc_addr[i++], ha->addr, ETH_ALEN);
|
|
}
|
|
|
|
for (i = 0; i < enic->uc_count; i++) {
|
|
for (j = 0; j < uc_count; j++)
|
|
if (compare_ether_addr(enic->uc_addr[i],
|
|
uc_addr[j]) == 0)
|
|
break;
|
|
if (j == uc_count)
|
|
enic_dev_del_addr(enic, enic->uc_addr[i]);
|
|
}
|
|
|
|
for (i = 0; i < uc_count; i++) {
|
|
for (j = 0; j < enic->uc_count; j++)
|
|
if (compare_ether_addr(uc_addr[i],
|
|
enic->uc_addr[j]) == 0)
|
|
break;
|
|
if (j == enic->uc_count)
|
|
enic_dev_add_addr(enic, uc_addr[i]);
|
|
}
|
|
|
|
/* Save the list to compare against next time
|
|
*/
|
|
|
|
for (i = 0; i < uc_count; i++)
|
|
memcpy(enic->uc_addr[i], uc_addr[i], ETH_ALEN);
|
|
|
|
enic->uc_count = uc_count;
|
|
}
|
|
|
|
/* netif_tx_lock held, BHs disabled */
|
|
static void enic_set_rx_mode(struct net_device *netdev)
|
|
{
|
|
struct enic *enic = netdev_priv(netdev);
|
|
int directed = 1;
|
|
int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
|
|
int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
|
|
int promisc = (netdev->flags & IFF_PROMISC) ||
|
|
netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS;
|
|
int allmulti = (netdev->flags & IFF_ALLMULTI) ||
|
|
netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS;
|
|
unsigned int flags = netdev->flags |
|
|
(allmulti ? IFF_ALLMULTI : 0) |
|
|
(promisc ? IFF_PROMISC : 0);
|
|
|
|
if (enic->flags != flags) {
|
|
enic->flags = flags;
|
|
enic_dev_packet_filter(enic, directed,
|
|
multicast, broadcast, promisc, allmulti);
|
|
}
|
|
|
|
if (!promisc) {
|
|
enic_update_unicast_addr_list(enic);
|
|
if (!allmulti)
|
|
enic_update_multicast_addr_list(enic);
|
|
}
|
|
}
|
|
|
|
/* rtnl lock is held */
|
|
static void enic_vlan_rx_register(struct net_device *netdev,
|
|
struct vlan_group *vlan_group)
|
|
{
|
|
struct enic *enic = netdev_priv(netdev);
|
|
enic->vlan_group = vlan_group;
|
|
}
|
|
|
|
/* netif_tx_lock held, BHs disabled */
|
|
static void enic_tx_timeout(struct net_device *netdev)
|
|
{
|
|
struct enic *enic = netdev_priv(netdev);
|
|
schedule_work(&enic->reset);
|
|
}
|
|
|
|
static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
|
|
{
|
|
struct enic *enic = netdev_priv(netdev);
|
|
|
|
if (vf != PORT_SELF_VF)
|
|
return -EOPNOTSUPP;
|
|
|
|
/* Ignore the vf argument for now. We can assume the request
|
|
* is coming on a vf.
|
|
*/
|
|
if (is_valid_ether_addr(mac)) {
|
|
memcpy(enic->pp.vf_mac, mac, ETH_ALEN);
|
|
return 0;
|
|
} else
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int enic_set_vf_port(struct net_device *netdev, int vf,
|
|
struct nlattr *port[])
|
|
{
|
|
struct enic *enic = netdev_priv(netdev);
|
|
struct enic_port_profile prev_pp;
|
|
int err = 0, restore_pp = 1;
|
|
|
|
/* don't support VFs, yet */
|
|
if (vf != PORT_SELF_VF)
|
|
return -EOPNOTSUPP;
|
|
|
|
if (!port[IFLA_PORT_REQUEST])
|
|
return -EOPNOTSUPP;
|
|
|
|
memcpy(&prev_pp, &enic->pp, sizeof(enic->pp));
|
|
memset(&enic->pp, 0, sizeof(enic->pp));
|
|
|
|
enic->pp.set |= ENIC_SET_REQUEST;
|
|
enic->pp.request = nla_get_u8(port[IFLA_PORT_REQUEST]);
|
|
|
|
if (port[IFLA_PORT_PROFILE]) {
|
|
enic->pp.set |= ENIC_SET_NAME;
|
|
memcpy(enic->pp.name, nla_data(port[IFLA_PORT_PROFILE]),
|
|
PORT_PROFILE_MAX);
|
|
}
|
|
|
|
if (port[IFLA_PORT_INSTANCE_UUID]) {
|
|
enic->pp.set |= ENIC_SET_INSTANCE;
|
|
memcpy(enic->pp.instance_uuid,
|
|
nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX);
|
|
}
|
|
|
|
if (port[IFLA_PORT_HOST_UUID]) {
|
|
enic->pp.set |= ENIC_SET_HOST;
|
|
memcpy(enic->pp.host_uuid,
|
|
nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX);
|
|
}
|
|
|
|
/* Special case handling: mac came from IFLA_VF_MAC */
|
|
if (!is_zero_ether_addr(prev_pp.vf_mac))
|
|
memcpy(enic->pp.mac_addr, prev_pp.vf_mac, ETH_ALEN);
|
|
|
|
if (is_zero_ether_addr(netdev->dev_addr))
|
|
random_ether_addr(netdev->dev_addr);
|
|
|
|
err = enic_process_set_pp_request(enic, &prev_pp, &restore_pp);
|
|
if (err) {
|
|
if (restore_pp) {
|
|
/* Things are still the way they were: Implicit
|
|
* DISASSOCIATE failed
|
|
*/
|
|
memcpy(&enic->pp, &prev_pp, sizeof(enic->pp));
|
|
} else {
|
|
memset(&enic->pp, 0, sizeof(enic->pp));
|
|
memset(netdev->dev_addr, 0, ETH_ALEN);
|
|
}
|
|
} else {
|
|
/* Set flag to indicate that the port assoc/disassoc
|
|
* request has been sent out to fw
|
|
*/
|
|
enic->pp.set |= ENIC_PORT_REQUEST_APPLIED;
|
|
|
|
/* If DISASSOCIATE, clean up all assigned/saved macaddresses */
|
|
if (enic->pp.request == PORT_REQUEST_DISASSOCIATE) {
|
|
memset(enic->pp.mac_addr, 0, ETH_ALEN);
|
|
memset(netdev->dev_addr, 0, ETH_ALEN);
|
|
}
|
|
}
|
|
|
|
memset(enic->pp.vf_mac, 0, ETH_ALEN);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int enic_get_vf_port(struct net_device *netdev, int vf,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct enic *enic = netdev_priv(netdev);
|
|
u16 response = PORT_PROFILE_RESPONSE_SUCCESS;
|
|
int err;
|
|
|
|
if (!(enic->pp.set & ENIC_PORT_REQUEST_APPLIED))
|
|
return -ENODATA;
|
|
|
|
err = enic_process_get_pp_request(enic, enic->pp.request, &response);
|
|
if (err)
|
|
return err;
|
|
|
|
NLA_PUT_U16(skb, IFLA_PORT_REQUEST, enic->pp.request);
|
|
NLA_PUT_U16(skb, IFLA_PORT_RESPONSE, response);
|
|
if (enic->pp.set & ENIC_SET_NAME)
|
|
NLA_PUT(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX,
|
|
enic->pp.name);
|
|
if (enic->pp.set & ENIC_SET_INSTANCE)
|
|
NLA_PUT(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX,
|
|
enic->pp.instance_uuid);
|
|
if (enic->pp.set & ENIC_SET_HOST)
|
|
NLA_PUT(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX,
|
|
enic->pp.host_uuid);
|
|
|
|
return 0;
|
|
|
|
nla_put_failure:
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
|
|
{
|
|
struct enic *enic = vnic_dev_priv(rq->vdev);
|
|
|
|
if (!buf->os_buf)
|
|
return;
|
|
|
|
pci_unmap_single(enic->pdev, buf->dma_addr,
|
|
buf->len, PCI_DMA_FROMDEVICE);
|
|
dev_kfree_skb_any(buf->os_buf);
|
|
}
|
|
|
|
static int enic_rq_alloc_buf(struct vnic_rq *rq)
|
|
{
|
|
struct enic *enic = vnic_dev_priv(rq->vdev);
|
|
struct net_device *netdev = enic->netdev;
|
|
struct sk_buff *skb;
|
|
unsigned int len = netdev->mtu + VLAN_ETH_HLEN;
|
|
unsigned int os_buf_index = 0;
|
|
dma_addr_t dma_addr;
|
|
|
|
skb = netdev_alloc_skb_ip_align(netdev, len);
|
|
if (!skb)
|
|
return -ENOMEM;
|
|
|
|
dma_addr = pci_map_single(enic->pdev, skb->data,
|
|
len, PCI_DMA_FROMDEVICE);
|
|
|
|
enic_queue_rq_desc(rq, skb, os_buf_index,
|
|
dma_addr, len);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void enic_rq_indicate_buf(struct vnic_rq *rq,
|
|
struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
|
|
int skipped, void *opaque)
|
|
{
|
|
struct enic *enic = vnic_dev_priv(rq->vdev);
|
|
struct net_device *netdev = enic->netdev;
|
|
struct sk_buff *skb;
|
|
|
|
u8 type, color, eop, sop, ingress_port, vlan_stripped;
|
|
u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
|
|
u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
|
|
u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
|
|
u8 packet_error;
|
|
u16 q_number, completed_index, bytes_written, vlan_tci, checksum;
|
|
u32 rss_hash;
|
|
|
|
if (skipped)
|
|
return;
|
|
|
|
skb = buf->os_buf;
|
|
prefetch(skb->data - NET_IP_ALIGN);
|
|
pci_unmap_single(enic->pdev, buf->dma_addr,
|
|
buf->len, PCI_DMA_FROMDEVICE);
|
|
|
|
cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
|
|
&type, &color, &q_number, &completed_index,
|
|
&ingress_port, &fcoe, &eop, &sop, &rss_type,
|
|
&csum_not_calc, &rss_hash, &bytes_written,
|
|
&packet_error, &vlan_stripped, &vlan_tci, &checksum,
|
|
&fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
|
|
&fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
|
|
&ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
|
|
&fcs_ok);
|
|
|
|
if (packet_error) {
|
|
|
|
if (!fcs_ok) {
|
|
if (bytes_written > 0)
|
|
enic->rq_bad_fcs++;
|
|
else if (bytes_written == 0)
|
|
enic->rq_truncated_pkts++;
|
|
}
|
|
|
|
dev_kfree_skb_any(skb);
|
|
|
|
return;
|
|
}
|
|
|
|
if (eop && bytes_written > 0) {
|
|
|
|
/* Good receive
|
|
*/
|
|
|
|
skb_put(skb, bytes_written);
|
|
skb->protocol = eth_type_trans(skb, netdev);
|
|
|
|
if ((netdev->features & NETIF_F_RXCSUM) && !csum_not_calc) {
|
|
skb->csum = htons(checksum);
|
|
skb->ip_summed = CHECKSUM_COMPLETE;
|
|
}
|
|
|
|
skb->dev = netdev;
|
|
|
|
if (enic->vlan_group && vlan_stripped &&
|
|
(vlan_tci & CQ_ENET_RQ_DESC_VLAN_TCI_VLAN_MASK)) {
|
|
|
|
if (netdev->features & NETIF_F_GRO)
|
|
vlan_gro_receive(&enic->napi[q_number],
|
|
enic->vlan_group, vlan_tci, skb);
|
|
else
|
|
vlan_hwaccel_receive_skb(skb,
|
|
enic->vlan_group, vlan_tci);
|
|
|
|
} else {
|
|
|
|
if (netdev->features & NETIF_F_GRO)
|
|
napi_gro_receive(&enic->napi[q_number], skb);
|
|
else
|
|
netif_receive_skb(skb);
|
|
|
|
}
|
|
} else {
|
|
|
|
/* Buffer overflow
|
|
*/
|
|
|
|
dev_kfree_skb_any(skb);
|
|
}
|
|
}
|
|
|
|
static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
|
|
u8 type, u16 q_number, u16 completed_index, void *opaque)
|
|
{
|
|
struct enic *enic = vnic_dev_priv(vdev);
|
|
|
|
vnic_rq_service(&enic->rq[q_number], cq_desc,
|
|
completed_index, VNIC_RQ_RETURN_DESC,
|
|
enic_rq_indicate_buf, opaque);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int enic_poll(struct napi_struct *napi, int budget)
|
|
{
|
|
struct net_device *netdev = napi->dev;
|
|
struct enic *enic = netdev_priv(netdev);
|
|
unsigned int cq_rq = enic_cq_rq(enic, 0);
|
|
unsigned int cq_wq = enic_cq_wq(enic, 0);
|
|
unsigned int intr = enic_legacy_io_intr();
|
|
unsigned int rq_work_to_do = budget;
|
|
unsigned int wq_work_to_do = -1; /* no limit */
|
|
unsigned int work_done, rq_work_done, wq_work_done;
|
|
int err;
|
|
|
|
/* Service RQ (first) and WQ
|
|
*/
|
|
|
|
rq_work_done = vnic_cq_service(&enic->cq[cq_rq],
|
|
rq_work_to_do, enic_rq_service, NULL);
|
|
|
|
wq_work_done = vnic_cq_service(&enic->cq[cq_wq],
|
|
wq_work_to_do, enic_wq_service, NULL);
|
|
|
|
/* Accumulate intr event credits for this polling
|
|
* cycle. An intr event is the completion of a
|
|
* a WQ or RQ packet.
|
|
*/
|
|
|
|
work_done = rq_work_done + wq_work_done;
|
|
|
|
if (work_done > 0)
|
|
vnic_intr_return_credits(&enic->intr[intr],
|
|
work_done,
|
|
0 /* don't unmask intr */,
|
|
0 /* don't reset intr timer */);
|
|
|
|
err = vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
|
|
|
|
/* Buffer allocation failed. Stay in polling
|
|
* mode so we can try to fill the ring again.
|
|
*/
|
|
|
|
if (err)
|
|
rq_work_done = rq_work_to_do;
|
|
|
|
if (rq_work_done < rq_work_to_do) {
|
|
|
|
/* Some work done, but not enough to stay in polling,
|
|
* exit polling
|
|
*/
|
|
|
|
napi_complete(napi);
|
|
vnic_intr_unmask(&enic->intr[intr]);
|
|
}
|
|
|
|
return rq_work_done;
|
|
}
|
|
|
|
static int enic_poll_msix(struct napi_struct *napi, int budget)
|
|
{
|
|
struct net_device *netdev = napi->dev;
|
|
struct enic *enic = netdev_priv(netdev);
|
|
unsigned int rq = (napi - &enic->napi[0]);
|
|
unsigned int cq = enic_cq_rq(enic, rq);
|
|
unsigned int intr = enic_msix_rq_intr(enic, rq);
|
|
unsigned int work_to_do = budget;
|
|
unsigned int work_done;
|
|
int err;
|
|
|
|
/* Service RQ
|
|
*/
|
|
|
|
work_done = vnic_cq_service(&enic->cq[cq],
|
|
work_to_do, enic_rq_service, NULL);
|
|
|
|
/* Return intr event credits for this polling
|
|
* cycle. An intr event is the completion of a
|
|
* RQ packet.
|
|
*/
|
|
|
|
if (work_done > 0)
|
|
vnic_intr_return_credits(&enic->intr[intr],
|
|
work_done,
|
|
0 /* don't unmask intr */,
|
|
0 /* don't reset intr timer */);
|
|
|
|
err = vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf);
|
|
|
|
/* Buffer allocation failed. Stay in polling mode
|
|
* so we can try to fill the ring again.
|
|
*/
|
|
|
|
if (err)
|
|
work_done = work_to_do;
|
|
|
|
if (work_done < work_to_do) {
|
|
|
|
/* Some work done, but not enough to stay in polling,
|
|
* exit polling
|
|
*/
|
|
|
|
napi_complete(napi);
|
|
vnic_intr_unmask(&enic->intr[intr]);
|
|
}
|
|
|
|
return work_done;
|
|
}
|
|
|
|
static void enic_notify_timer(unsigned long data)
|
|
{
|
|
struct enic *enic = (struct enic *)data;
|
|
|
|
enic_notify_check(enic);
|
|
|
|
mod_timer(&enic->notify_timer,
|
|
round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
|
|
}
|
|
|
|
static void enic_free_intr(struct enic *enic)
|
|
{
|
|
struct net_device *netdev = enic->netdev;
|
|
unsigned int i;
|
|
|
|
switch (vnic_dev_get_intr_mode(enic->vdev)) {
|
|
case VNIC_DEV_INTR_MODE_INTX:
|
|
free_irq(enic->pdev->irq, netdev);
|
|
break;
|
|
case VNIC_DEV_INTR_MODE_MSI:
|
|
free_irq(enic->pdev->irq, enic);
|
|
break;
|
|
case VNIC_DEV_INTR_MODE_MSIX:
|
|
for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
|
|
if (enic->msix[i].requested)
|
|
free_irq(enic->msix_entry[i].vector,
|
|
enic->msix[i].devid);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int enic_request_intr(struct enic *enic)
|
|
{
|
|
struct net_device *netdev = enic->netdev;
|
|
unsigned int i, intr;
|
|
int err = 0;
|
|
|
|
switch (vnic_dev_get_intr_mode(enic->vdev)) {
|
|
|
|
case VNIC_DEV_INTR_MODE_INTX:
|
|
|
|
err = request_irq(enic->pdev->irq, enic_isr_legacy,
|
|
IRQF_SHARED, netdev->name, netdev);
|
|
break;
|
|
|
|
case VNIC_DEV_INTR_MODE_MSI:
|
|
|
|
err = request_irq(enic->pdev->irq, enic_isr_msi,
|
|
0, netdev->name, enic);
|
|
break;
|
|
|
|
case VNIC_DEV_INTR_MODE_MSIX:
|
|
|
|
for (i = 0; i < enic->rq_count; i++) {
|
|
intr = enic_msix_rq_intr(enic, i);
|
|
sprintf(enic->msix[intr].devname,
|
|
"%.11s-rx-%d", netdev->name, i);
|
|
enic->msix[intr].isr = enic_isr_msix_rq;
|
|
enic->msix[intr].devid = &enic->napi[i];
|
|
}
|
|
|
|
for (i = 0; i < enic->wq_count; i++) {
|
|
intr = enic_msix_wq_intr(enic, i);
|
|
sprintf(enic->msix[intr].devname,
|
|
"%.11s-tx-%d", netdev->name, i);
|
|
enic->msix[intr].isr = enic_isr_msix_wq;
|
|
enic->msix[intr].devid = enic;
|
|
}
|
|
|
|
intr = enic_msix_err_intr(enic);
|
|
sprintf(enic->msix[intr].devname,
|
|
"%.11s-err", netdev->name);
|
|
enic->msix[intr].isr = enic_isr_msix_err;
|
|
enic->msix[intr].devid = enic;
|
|
|
|
intr = enic_msix_notify_intr(enic);
|
|
sprintf(enic->msix[intr].devname,
|
|
"%.11s-notify", netdev->name);
|
|
enic->msix[intr].isr = enic_isr_msix_notify;
|
|
enic->msix[intr].devid = enic;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
|
|
enic->msix[i].requested = 0;
|
|
|
|
for (i = 0; i < enic->intr_count; i++) {
|
|
err = request_irq(enic->msix_entry[i].vector,
|
|
enic->msix[i].isr, 0,
|
|
enic->msix[i].devname,
|
|
enic->msix[i].devid);
|
|
if (err) {
|
|
enic_free_intr(enic);
|
|
break;
|
|
}
|
|
enic->msix[i].requested = 1;
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static void enic_synchronize_irqs(struct enic *enic)
|
|
{
|
|
unsigned int i;
|
|
|
|
switch (vnic_dev_get_intr_mode(enic->vdev)) {
|
|
case VNIC_DEV_INTR_MODE_INTX:
|
|
case VNIC_DEV_INTR_MODE_MSI:
|
|
synchronize_irq(enic->pdev->irq);
|
|
break;
|
|
case VNIC_DEV_INTR_MODE_MSIX:
|
|
for (i = 0; i < enic->intr_count; i++)
|
|
synchronize_irq(enic->msix_entry[i].vector);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int enic_dev_notify_set(struct enic *enic)
|
|
{
|
|
int err;
|
|
|
|
spin_lock(&enic->devcmd_lock);
|
|
switch (vnic_dev_get_intr_mode(enic->vdev)) {
|
|
case VNIC_DEV_INTR_MODE_INTX:
|
|
err = vnic_dev_notify_set(enic->vdev,
|
|
enic_legacy_notify_intr());
|
|
break;
|
|
case VNIC_DEV_INTR_MODE_MSIX:
|
|
err = vnic_dev_notify_set(enic->vdev,
|
|
enic_msix_notify_intr(enic));
|
|
break;
|
|
default:
|
|
err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
|
|
break;
|
|
}
|
|
spin_unlock(&enic->devcmd_lock);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void enic_notify_timer_start(struct enic *enic)
|
|
{
|
|
switch (vnic_dev_get_intr_mode(enic->vdev)) {
|
|
case VNIC_DEV_INTR_MODE_MSI:
|
|
mod_timer(&enic->notify_timer, jiffies);
|
|
break;
|
|
default:
|
|
/* Using intr for notification for INTx/MSI-X */
|
|
break;
|
|
};
|
|
}
|
|
|
|
/* rtnl lock is held, process context */
|
|
static int enic_open(struct net_device *netdev)
|
|
{
|
|
struct enic *enic = netdev_priv(netdev);
|
|
unsigned int i;
|
|
int err;
|
|
|
|
err = enic_request_intr(enic);
|
|
if (err) {
|
|
netdev_err(netdev, "Unable to request irq.\n");
|
|
return err;
|
|
}
|
|
|
|
err = enic_dev_notify_set(enic);
|
|
if (err) {
|
|
netdev_err(netdev,
|
|
"Failed to alloc notify buffer, aborting.\n");
|
|
goto err_out_free_intr;
|
|
}
|
|
|
|
for (i = 0; i < enic->rq_count; i++) {
|
|
vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf);
|
|
/* Need at least one buffer on ring to get going */
|
|
if (vnic_rq_desc_used(&enic->rq[i]) == 0) {
|
|
netdev_err(netdev, "Unable to alloc receive buffers\n");
|
|
err = -ENOMEM;
|
|
goto err_out_notify_unset;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < enic->wq_count; i++)
|
|
vnic_wq_enable(&enic->wq[i]);
|
|
for (i = 0; i < enic->rq_count; i++)
|
|
vnic_rq_enable(&enic->rq[i]);
|
|
|
|
if (enic_is_dynamic(enic) && !is_zero_ether_addr(enic->pp.mac_addr))
|
|
enic_dev_add_addr(enic, enic->pp.mac_addr);
|
|
else
|
|
enic_dev_add_station_addr(enic);
|
|
enic_set_rx_mode(netdev);
|
|
|
|
netif_wake_queue(netdev);
|
|
|
|
for (i = 0; i < enic->rq_count; i++)
|
|
napi_enable(&enic->napi[i]);
|
|
|
|
enic_dev_enable(enic);
|
|
|
|
for (i = 0; i < enic->intr_count; i++)
|
|
vnic_intr_unmask(&enic->intr[i]);
|
|
|
|
enic_notify_timer_start(enic);
|
|
|
|
return 0;
|
|
|
|
err_out_notify_unset:
|
|
enic_dev_notify_unset(enic);
|
|
err_out_free_intr:
|
|
enic_free_intr(enic);
|
|
|
|
return err;
|
|
}
|
|
|
|
/* rtnl lock is held, process context */
|
|
static int enic_stop(struct net_device *netdev)
|
|
{
|
|
struct enic *enic = netdev_priv(netdev);
|
|
unsigned int i;
|
|
int err;
|
|
|
|
for (i = 0; i < enic->intr_count; i++) {
|
|
vnic_intr_mask(&enic->intr[i]);
|
|
(void)vnic_intr_masked(&enic->intr[i]); /* flush write */
|
|
}
|
|
|
|
enic_synchronize_irqs(enic);
|
|
|
|
del_timer_sync(&enic->notify_timer);
|
|
|
|
enic_dev_disable(enic);
|
|
|
|
for (i = 0; i < enic->rq_count; i++)
|
|
napi_disable(&enic->napi[i]);
|
|
|
|
netif_carrier_off(netdev);
|
|
netif_tx_disable(netdev);
|
|
if (enic_is_dynamic(enic) && !is_zero_ether_addr(enic->pp.mac_addr))
|
|
enic_dev_del_addr(enic, enic->pp.mac_addr);
|
|
else
|
|
enic_dev_del_station_addr(enic);
|
|
|
|
for (i = 0; i < enic->wq_count; i++) {
|
|
err = vnic_wq_disable(&enic->wq[i]);
|
|
if (err)
|
|
return err;
|
|
}
|
|
for (i = 0; i < enic->rq_count; i++) {
|
|
err = vnic_rq_disable(&enic->rq[i]);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
enic_dev_notify_unset(enic);
|
|
enic_free_intr(enic);
|
|
|
|
for (i = 0; i < enic->wq_count; i++)
|
|
vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
|
|
for (i = 0; i < enic->rq_count; i++)
|
|
vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
|
|
for (i = 0; i < enic->cq_count; i++)
|
|
vnic_cq_clean(&enic->cq[i]);
|
|
for (i = 0; i < enic->intr_count; i++)
|
|
vnic_intr_clean(&enic->intr[i]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int enic_change_mtu(struct net_device *netdev, int new_mtu)
|
|
{
|
|
struct enic *enic = netdev_priv(netdev);
|
|
int running = netif_running(netdev);
|
|
|
|
if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
|
|
return -EINVAL;
|
|
|
|
if (running)
|
|
enic_stop(netdev);
|
|
|
|
netdev->mtu = new_mtu;
|
|
|
|
if (netdev->mtu > enic->port_mtu)
|
|
netdev_warn(netdev,
|
|
"interface MTU (%d) set higher than port MTU (%d)\n",
|
|
netdev->mtu, enic->port_mtu);
|
|
|
|
if (running)
|
|
enic_open(netdev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
|
static void enic_poll_controller(struct net_device *netdev)
|
|
{
|
|
struct enic *enic = netdev_priv(netdev);
|
|
struct vnic_dev *vdev = enic->vdev;
|
|
unsigned int i, intr;
|
|
|
|
switch (vnic_dev_get_intr_mode(vdev)) {
|
|
case VNIC_DEV_INTR_MODE_MSIX:
|
|
for (i = 0; i < enic->rq_count; i++) {
|
|
intr = enic_msix_rq_intr(enic, i);
|
|
enic_isr_msix_rq(enic->msix_entry[intr].vector,
|
|
&enic->napi[i]);
|
|
}
|
|
intr = enic_msix_wq_intr(enic, i);
|
|
enic_isr_msix_wq(enic->msix_entry[intr].vector, enic);
|
|
break;
|
|
case VNIC_DEV_INTR_MODE_MSI:
|
|
enic_isr_msi(enic->pdev->irq, enic);
|
|
break;
|
|
case VNIC_DEV_INTR_MODE_INTX:
|
|
enic_isr_legacy(enic->pdev->irq, netdev);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
static int enic_dev_wait(struct vnic_dev *vdev,
|
|
int (*start)(struct vnic_dev *, int),
|
|
int (*finished)(struct vnic_dev *, int *),
|
|
int arg)
|
|
{
|
|
unsigned long time;
|
|
int done;
|
|
int err;
|
|
|
|
BUG_ON(in_interrupt());
|
|
|
|
err = start(vdev, arg);
|
|
if (err)
|
|
return err;
|
|
|
|
/* Wait for func to complete...2 seconds max
|
|
*/
|
|
|
|
time = jiffies + (HZ * 2);
|
|
do {
|
|
|
|
err = finished(vdev, &done);
|
|
if (err)
|
|
return err;
|
|
|
|
if (done)
|
|
return 0;
|
|
|
|
schedule_timeout_uninterruptible(HZ / 10);
|
|
|
|
} while (time_after(time, jiffies));
|
|
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
static int enic_dev_open(struct enic *enic)
|
|
{
|
|
int err;
|
|
|
|
err = enic_dev_wait(enic->vdev, vnic_dev_open,
|
|
vnic_dev_open_done, 0);
|
|
if (err)
|
|
dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n",
|
|
err);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int enic_dev_hang_reset(struct enic *enic)
|
|
{
|
|
int err;
|
|
|
|
err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset,
|
|
vnic_dev_hang_reset_done, 0);
|
|
if (err)
|
|
netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n",
|
|
err);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int enic_set_rsskey(struct enic *enic)
|
|
{
|
|
dma_addr_t rss_key_buf_pa;
|
|
union vnic_rss_key *rss_key_buf_va = NULL;
|
|
union vnic_rss_key rss_key = {
|
|
.key[0].b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101},
|
|
.key[1].b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101},
|
|
.key[2].b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115},
|
|
.key[3].b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108},
|
|
};
|
|
int err;
|
|
|
|
rss_key_buf_va = pci_alloc_consistent(enic->pdev,
|
|
sizeof(union vnic_rss_key), &rss_key_buf_pa);
|
|
if (!rss_key_buf_va)
|
|
return -ENOMEM;
|
|
|
|
memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
|
|
|
|
spin_lock(&enic->devcmd_lock);
|
|
err = enic_set_rss_key(enic,
|
|
rss_key_buf_pa,
|
|
sizeof(union vnic_rss_key));
|
|
spin_unlock(&enic->devcmd_lock);
|
|
|
|
pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key),
|
|
rss_key_buf_va, rss_key_buf_pa);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
|
|
{
|
|
dma_addr_t rss_cpu_buf_pa;
|
|
union vnic_rss_cpu *rss_cpu_buf_va = NULL;
|
|
unsigned int i;
|
|
int err;
|
|
|
|
rss_cpu_buf_va = pci_alloc_consistent(enic->pdev,
|
|
sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa);
|
|
if (!rss_cpu_buf_va)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < (1 << rss_hash_bits); i++)
|
|
(*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count;
|
|
|
|
spin_lock(&enic->devcmd_lock);
|
|
err = enic_set_rss_cpu(enic,
|
|
rss_cpu_buf_pa,
|
|
sizeof(union vnic_rss_cpu));
|
|
spin_unlock(&enic->devcmd_lock);
|
|
|
|
pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu),
|
|
rss_cpu_buf_va, rss_cpu_buf_pa);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
|
|
u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
|
|
{
|
|
const u8 tso_ipid_split_en = 0;
|
|
const u8 ig_vlan_strip_en = 1;
|
|
int err;
|
|
|
|
/* Enable VLAN tag stripping.
|
|
*/
|
|
|
|
spin_lock(&enic->devcmd_lock);
|
|
err = enic_set_nic_cfg(enic,
|
|
rss_default_cpu, rss_hash_type,
|
|
rss_hash_bits, rss_base_cpu,
|
|
rss_enable, tso_ipid_split_en,
|
|
ig_vlan_strip_en);
|
|
spin_unlock(&enic->devcmd_lock);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int enic_set_rss_nic_cfg(struct enic *enic)
|
|
{
|
|
struct device *dev = enic_get_dev(enic);
|
|
const u8 rss_default_cpu = 0;
|
|
const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
|
|
NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
|
|
NIC_CFG_RSS_HASH_TYPE_IPV6 |
|
|
NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
|
|
const u8 rss_hash_bits = 7;
|
|
const u8 rss_base_cpu = 0;
|
|
u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
|
|
|
|
if (rss_enable) {
|
|
if (!enic_set_rsskey(enic)) {
|
|
if (enic_set_rsscpu(enic, rss_hash_bits)) {
|
|
rss_enable = 0;
|
|
dev_warn(dev, "RSS disabled, "
|
|
"Failed to set RSS cpu indirection table.");
|
|
}
|
|
} else {
|
|
rss_enable = 0;
|
|
dev_warn(dev, "RSS disabled, Failed to set RSS key.\n");
|
|
}
|
|
}
|
|
|
|
return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
|
|
rss_hash_bits, rss_base_cpu, rss_enable);
|
|
}
|
|
|
|
static void enic_reset(struct work_struct *work)
|
|
{
|
|
struct enic *enic = container_of(work, struct enic, reset);
|
|
|
|
if (!netif_running(enic->netdev))
|
|
return;
|
|
|
|
rtnl_lock();
|
|
|
|
enic_dev_hang_notify(enic);
|
|
enic_stop(enic->netdev);
|
|
enic_dev_hang_reset(enic);
|
|
enic_reset_addr_lists(enic);
|
|
enic_init_vnic_resources(enic);
|
|
enic_set_rss_nic_cfg(enic);
|
|
enic_dev_set_ig_vlan_rewrite_mode(enic);
|
|
enic_open(enic->netdev);
|
|
|
|
rtnl_unlock();
|
|
}
|
|
|
|
static int enic_set_intr_mode(struct enic *enic)
|
|
{
|
|
unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX);
|
|
unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX);
|
|
unsigned int i;
|
|
|
|
/* Set interrupt mode (INTx, MSI, MSI-X) depending
|
|
* on system capabilities.
|
|
*
|
|
* Try MSI-X first
|
|
*
|
|
* We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
|
|
* (the second to last INTR is used for WQ/RQ errors)
|
|
* (the last INTR is used for notifications)
|
|
*/
|
|
|
|
BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
|
|
for (i = 0; i < n + m + 2; i++)
|
|
enic->msix_entry[i].entry = i;
|
|
|
|
/* Use multiple RQs if RSS is enabled
|
|
*/
|
|
|
|
if (ENIC_SETTING(enic, RSS) &&
|
|
enic->config.intr_mode < 1 &&
|
|
enic->rq_count >= n &&
|
|
enic->wq_count >= m &&
|
|
enic->cq_count >= n + m &&
|
|
enic->intr_count >= n + m + 2) {
|
|
|
|
if (!pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) {
|
|
|
|
enic->rq_count = n;
|
|
enic->wq_count = m;
|
|
enic->cq_count = n + m;
|
|
enic->intr_count = n + m + 2;
|
|
|
|
vnic_dev_set_intr_mode(enic->vdev,
|
|
VNIC_DEV_INTR_MODE_MSIX);
|
|
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (enic->config.intr_mode < 1 &&
|
|
enic->rq_count >= 1 &&
|
|
enic->wq_count >= m &&
|
|
enic->cq_count >= 1 + m &&
|
|
enic->intr_count >= 1 + m + 2) {
|
|
if (!pci_enable_msix(enic->pdev, enic->msix_entry, 1 + m + 2)) {
|
|
|
|
enic->rq_count = 1;
|
|
enic->wq_count = m;
|
|
enic->cq_count = 1 + m;
|
|
enic->intr_count = 1 + m + 2;
|
|
|
|
vnic_dev_set_intr_mode(enic->vdev,
|
|
VNIC_DEV_INTR_MODE_MSIX);
|
|
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* Next try MSI
|
|
*
|
|
* We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
|
|
*/
|
|
|
|
if (enic->config.intr_mode < 2 &&
|
|
enic->rq_count >= 1 &&
|
|
enic->wq_count >= 1 &&
|
|
enic->cq_count >= 2 &&
|
|
enic->intr_count >= 1 &&
|
|
!pci_enable_msi(enic->pdev)) {
|
|
|
|
enic->rq_count = 1;
|
|
enic->wq_count = 1;
|
|
enic->cq_count = 2;
|
|
enic->intr_count = 1;
|
|
|
|
vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Next try INTx
|
|
*
|
|
* We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
|
|
* (the first INTR is used for WQ/RQ)
|
|
* (the second INTR is used for WQ/RQ errors)
|
|
* (the last INTR is used for notifications)
|
|
*/
|
|
|
|
if (enic->config.intr_mode < 3 &&
|
|
enic->rq_count >= 1 &&
|
|
enic->wq_count >= 1 &&
|
|
enic->cq_count >= 2 &&
|
|
enic->intr_count >= 3) {
|
|
|
|
enic->rq_count = 1;
|
|
enic->wq_count = 1;
|
|
enic->cq_count = 2;
|
|
enic->intr_count = 3;
|
|
|
|
vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
|
|
|
|
return 0;
|
|
}
|
|
|
|
vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static void enic_clear_intr_mode(struct enic *enic)
|
|
{
|
|
switch (vnic_dev_get_intr_mode(enic->vdev)) {
|
|
case VNIC_DEV_INTR_MODE_MSIX:
|
|
pci_disable_msix(enic->pdev);
|
|
break;
|
|
case VNIC_DEV_INTR_MODE_MSI:
|
|
pci_disable_msi(enic->pdev);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
|
|
}
|
|
|
|
static const struct net_device_ops enic_netdev_dynamic_ops = {
|
|
.ndo_open = enic_open,
|
|
.ndo_stop = enic_stop,
|
|
.ndo_start_xmit = enic_hard_start_xmit,
|
|
.ndo_get_stats = enic_get_stats,
|
|
.ndo_validate_addr = eth_validate_addr,
|
|
.ndo_set_rx_mode = enic_set_rx_mode,
|
|
.ndo_set_multicast_list = enic_set_rx_mode,
|
|
.ndo_set_mac_address = enic_set_mac_address_dynamic,
|
|
.ndo_change_mtu = enic_change_mtu,
|
|
.ndo_vlan_rx_register = enic_vlan_rx_register,
|
|
.ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
|
|
.ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
|
|
.ndo_tx_timeout = enic_tx_timeout,
|
|
.ndo_set_vf_port = enic_set_vf_port,
|
|
.ndo_get_vf_port = enic_get_vf_port,
|
|
.ndo_set_vf_mac = enic_set_vf_mac,
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
|
.ndo_poll_controller = enic_poll_controller,
|
|
#endif
|
|
};
|
|
|
|
static const struct net_device_ops enic_netdev_ops = {
|
|
.ndo_open = enic_open,
|
|
.ndo_stop = enic_stop,
|
|
.ndo_start_xmit = enic_hard_start_xmit,
|
|
.ndo_get_stats = enic_get_stats,
|
|
.ndo_validate_addr = eth_validate_addr,
|
|
.ndo_set_mac_address = enic_set_mac_address,
|
|
.ndo_set_rx_mode = enic_set_rx_mode,
|
|
.ndo_set_multicast_list = enic_set_rx_mode,
|
|
.ndo_change_mtu = enic_change_mtu,
|
|
.ndo_vlan_rx_register = enic_vlan_rx_register,
|
|
.ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
|
|
.ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
|
|
.ndo_tx_timeout = enic_tx_timeout,
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
|
.ndo_poll_controller = enic_poll_controller,
|
|
#endif
|
|
};
|
|
|
|
static void enic_dev_deinit(struct enic *enic)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < enic->rq_count; i++)
|
|
netif_napi_del(&enic->napi[i]);
|
|
|
|
enic_free_vnic_resources(enic);
|
|
enic_clear_intr_mode(enic);
|
|
}
|
|
|
|
static int enic_dev_init(struct enic *enic)
|
|
{
|
|
struct device *dev = enic_get_dev(enic);
|
|
struct net_device *netdev = enic->netdev;
|
|
unsigned int i;
|
|
int err;
|
|
|
|
/* Get vNIC configuration
|
|
*/
|
|
|
|
err = enic_get_vnic_config(enic);
|
|
if (err) {
|
|
dev_err(dev, "Get vNIC configuration failed, aborting\n");
|
|
return err;
|
|
}
|
|
|
|
/* Get available resource counts
|
|
*/
|
|
|
|
enic_get_res_counts(enic);
|
|
|
|
/* Set interrupt mode based on resource counts and system
|
|
* capabilities
|
|
*/
|
|
|
|
err = enic_set_intr_mode(enic);
|
|
if (err) {
|
|
dev_err(dev, "Failed to set intr mode based on resource "
|
|
"counts and system capabilities, aborting\n");
|
|
return err;
|
|
}
|
|
|
|
/* Allocate and configure vNIC resources
|
|
*/
|
|
|
|
err = enic_alloc_vnic_resources(enic);
|
|
if (err) {
|
|
dev_err(dev, "Failed to alloc vNIC resources, aborting\n");
|
|
goto err_out_free_vnic_resources;
|
|
}
|
|
|
|
enic_init_vnic_resources(enic);
|
|
|
|
err = enic_set_rss_nic_cfg(enic);
|
|
if (err) {
|
|
dev_err(dev, "Failed to config nic, aborting\n");
|
|
goto err_out_free_vnic_resources;
|
|
}
|
|
|
|
switch (vnic_dev_get_intr_mode(enic->vdev)) {
|
|
default:
|
|
netif_napi_add(netdev, &enic->napi[0], enic_poll, 64);
|
|
break;
|
|
case VNIC_DEV_INTR_MODE_MSIX:
|
|
for (i = 0; i < enic->rq_count; i++)
|
|
netif_napi_add(netdev, &enic->napi[i],
|
|
enic_poll_msix, 64);
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_out_free_vnic_resources:
|
|
enic_clear_intr_mode(enic);
|
|
enic_free_vnic_resources(enic);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void enic_iounmap(struct enic *enic)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
|
|
if (enic->bar[i].vaddr)
|
|
iounmap(enic->bar[i].vaddr);
|
|
}
|
|
|
|
static int __devinit enic_probe(struct pci_dev *pdev,
|
|
const struct pci_device_id *ent)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct net_device *netdev;
|
|
struct enic *enic;
|
|
int using_dac = 0;
|
|
unsigned int i;
|
|
int err;
|
|
|
|
/* Allocate net device structure and initialize. Private
|
|
* instance data is initialized to zero.
|
|
*/
|
|
|
|
netdev = alloc_etherdev(sizeof(struct enic));
|
|
if (!netdev) {
|
|
pr_err("Etherdev alloc failed, aborting\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
pci_set_drvdata(pdev, netdev);
|
|
|
|
SET_NETDEV_DEV(netdev, &pdev->dev);
|
|
|
|
enic = netdev_priv(netdev);
|
|
enic->netdev = netdev;
|
|
enic->pdev = pdev;
|
|
|
|
/* Setup PCI resources
|
|
*/
|
|
|
|
err = pci_enable_device_mem(pdev);
|
|
if (err) {
|
|
dev_err(dev, "Cannot enable PCI device, aborting\n");
|
|
goto err_out_free_netdev;
|
|
}
|
|
|
|
err = pci_request_regions(pdev, DRV_NAME);
|
|
if (err) {
|
|
dev_err(dev, "Cannot request PCI regions, aborting\n");
|
|
goto err_out_disable_device;
|
|
}
|
|
|
|
pci_set_master(pdev);
|
|
|
|
/* Query PCI controller on system for DMA addressing
|
|
* limitation for the device. Try 40-bit first, and
|
|
* fail to 32-bit.
|
|
*/
|
|
|
|
err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40));
|
|
if (err) {
|
|
err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
|
|
if (err) {
|
|
dev_err(dev, "No usable DMA configuration, aborting\n");
|
|
goto err_out_release_regions;
|
|
}
|
|
err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
|
|
if (err) {
|
|
dev_err(dev, "Unable to obtain %u-bit DMA "
|
|
"for consistent allocations, aborting\n", 32);
|
|
goto err_out_release_regions;
|
|
}
|
|
} else {
|
|
err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40));
|
|
if (err) {
|
|
dev_err(dev, "Unable to obtain %u-bit DMA "
|
|
"for consistent allocations, aborting\n", 40);
|
|
goto err_out_release_regions;
|
|
}
|
|
using_dac = 1;
|
|
}
|
|
|
|
/* Map vNIC resources from BAR0-5
|
|
*/
|
|
|
|
for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
|
|
if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
|
|
continue;
|
|
enic->bar[i].len = pci_resource_len(pdev, i);
|
|
enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
|
|
if (!enic->bar[i].vaddr) {
|
|
dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i);
|
|
err = -ENODEV;
|
|
goto err_out_iounmap;
|
|
}
|
|
enic->bar[i].bus_addr = pci_resource_start(pdev, i);
|
|
}
|
|
|
|
/* Register vNIC device
|
|
*/
|
|
|
|
enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
|
|
ARRAY_SIZE(enic->bar));
|
|
if (!enic->vdev) {
|
|
dev_err(dev, "vNIC registration failed, aborting\n");
|
|
err = -ENODEV;
|
|
goto err_out_iounmap;
|
|
}
|
|
|
|
/* Issue device open to get device in known state
|
|
*/
|
|
|
|
err = enic_dev_open(enic);
|
|
if (err) {
|
|
dev_err(dev, "vNIC dev open failed, aborting\n");
|
|
goto err_out_vnic_unregister;
|
|
}
|
|
|
|
/* Setup devcmd lock
|
|
*/
|
|
|
|
spin_lock_init(&enic->devcmd_lock);
|
|
|
|
/*
|
|
* Set ingress vlan rewrite mode before vnic initialization
|
|
*/
|
|
|
|
err = enic_dev_set_ig_vlan_rewrite_mode(enic);
|
|
if (err) {
|
|
dev_err(dev,
|
|
"Failed to set ingress vlan rewrite mode, aborting.\n");
|
|
goto err_out_dev_close;
|
|
}
|
|
|
|
/* Issue device init to initialize the vnic-to-switch link.
|
|
* We'll start with carrier off and wait for link UP
|
|
* notification later to turn on carrier. We don't need
|
|
* to wait here for the vnic-to-switch link initialization
|
|
* to complete; link UP notification is the indication that
|
|
* the process is complete.
|
|
*/
|
|
|
|
netif_carrier_off(netdev);
|
|
|
|
/* Do not call dev_init for a dynamic vnic.
|
|
* For a dynamic vnic, init_prov_info will be
|
|
* called later by an upper layer.
|
|
*/
|
|
|
|
if (!enic_is_dynamic(enic)) {
|
|
err = vnic_dev_init(enic->vdev, 0);
|
|
if (err) {
|
|
dev_err(dev, "vNIC dev init failed, aborting\n");
|
|
goto err_out_dev_close;
|
|
}
|
|
}
|
|
|
|
err = enic_dev_init(enic);
|
|
if (err) {
|
|
dev_err(dev, "Device initialization failed, aborting\n");
|
|
goto err_out_dev_close;
|
|
}
|
|
|
|
/* Setup notification timer, HW reset task, and wq locks
|
|
*/
|
|
|
|
init_timer(&enic->notify_timer);
|
|
enic->notify_timer.function = enic_notify_timer;
|
|
enic->notify_timer.data = (unsigned long)enic;
|
|
|
|
INIT_WORK(&enic->reset, enic_reset);
|
|
|
|
for (i = 0; i < enic->wq_count; i++)
|
|
spin_lock_init(&enic->wq_lock[i]);
|
|
|
|
/* Register net device
|
|
*/
|
|
|
|
enic->port_mtu = enic->config.mtu;
|
|
(void)enic_change_mtu(netdev, enic->port_mtu);
|
|
|
|
err = enic_set_mac_addr(netdev, enic->mac_addr);
|
|
if (err) {
|
|
dev_err(dev, "Invalid MAC address, aborting\n");
|
|
goto err_out_dev_deinit;
|
|
}
|
|
|
|
enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
|
|
enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;
|
|
|
|
if (enic_is_dynamic(enic))
|
|
netdev->netdev_ops = &enic_netdev_dynamic_ops;
|
|
else
|
|
netdev->netdev_ops = &enic_netdev_ops;
|
|
|
|
netdev->watchdog_timeo = 2 * HZ;
|
|
netdev->ethtool_ops = &enic_ethtool_ops;
|
|
|
|
netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
|
|
if (ENIC_SETTING(enic, LOOP)) {
|
|
netdev->features &= ~NETIF_F_HW_VLAN_TX;
|
|
enic->loop_enable = 1;
|
|
enic->loop_tag = enic->config.loop_tag;
|
|
dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag);
|
|
}
|
|
if (ENIC_SETTING(enic, TXCSUM))
|
|
netdev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM;
|
|
if (ENIC_SETTING(enic, TSO))
|
|
netdev->hw_features |= NETIF_F_TSO |
|
|
NETIF_F_TSO6 | NETIF_F_TSO_ECN;
|
|
if (ENIC_SETTING(enic, RXCSUM))
|
|
netdev->hw_features |= NETIF_F_RXCSUM;
|
|
|
|
netdev->features |= netdev->hw_features;
|
|
|
|
if (using_dac)
|
|
netdev->features |= NETIF_F_HIGHDMA;
|
|
|
|
err = register_netdev(netdev);
|
|
if (err) {
|
|
dev_err(dev, "Cannot register net device, aborting\n");
|
|
goto err_out_dev_deinit;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_out_dev_deinit:
|
|
enic_dev_deinit(enic);
|
|
err_out_dev_close:
|
|
vnic_dev_close(enic->vdev);
|
|
err_out_vnic_unregister:
|
|
vnic_dev_unregister(enic->vdev);
|
|
err_out_iounmap:
|
|
enic_iounmap(enic);
|
|
err_out_release_regions:
|
|
pci_release_regions(pdev);
|
|
err_out_disable_device:
|
|
pci_disable_device(pdev);
|
|
err_out_free_netdev:
|
|
pci_set_drvdata(pdev, NULL);
|
|
free_netdev(netdev);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void __devexit enic_remove(struct pci_dev *pdev)
|
|
{
|
|
struct net_device *netdev = pci_get_drvdata(pdev);
|
|
|
|
if (netdev) {
|
|
struct enic *enic = netdev_priv(netdev);
|
|
|
|
cancel_work_sync(&enic->reset);
|
|
unregister_netdev(netdev);
|
|
enic_dev_deinit(enic);
|
|
vnic_dev_close(enic->vdev);
|
|
vnic_dev_unregister(enic->vdev);
|
|
enic_iounmap(enic);
|
|
pci_release_regions(pdev);
|
|
pci_disable_device(pdev);
|
|
pci_set_drvdata(pdev, NULL);
|
|
free_netdev(netdev);
|
|
}
|
|
}
|
|
|
|
static struct pci_driver enic_driver = {
|
|
.name = DRV_NAME,
|
|
.id_table = enic_id_table,
|
|
.probe = enic_probe,
|
|
.remove = __devexit_p(enic_remove),
|
|
};
|
|
|
|
static int __init enic_init_module(void)
|
|
{
|
|
pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
|
|
|
|
return pci_register_driver(&enic_driver);
|
|
}
|
|
|
|
static void __exit enic_cleanup_module(void)
|
|
{
|
|
pci_unregister_driver(&enic_driver);
|
|
}
|
|
|
|
module_init(enic_init_module);
|
|
module_exit(enic_cleanup_module);
|