diff options
Diffstat (limited to 'drivers/net/enic/enic_main.c')
| -rw-r--r-- | drivers/net/enic/enic_main.c | 1935 |
1 files changed, 1935 insertions, 0 deletions
diff --git a/drivers/net/enic/enic_main.c b/drivers/net/enic/enic_main.c new file mode 100644 index 000000000000..180e968dc54d --- /dev/null +++ b/drivers/net/enic/enic_main.c @@ -0,0 +1,1935 @@ +/* + * Copyright 2008 Cisco Systems, Inc. All rights reserved. + * Copyright 2007 Nuova Systems, Inc. All rights reserved. + * + * This program is free software; you may redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + * + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/errno.h> +#include <linux/types.h> +#include <linux/init.h> +#include <linux/workqueue.h> +#include <linux/pci.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/if_ether.h> +#include <linux/if_vlan.h> +#include <linux/ethtool.h> +#include <linux/in.h> +#include <linux/ip.h> +#include <linux/ipv6.h> +#include <linux/tcp.h> +#include <net/ip6_checksum.h> + +#include "cq_enet_desc.h" +#include "vnic_dev.h" +#include "vnic_intr.h" +#include "vnic_stats.h" +#include "enic_res.h" +#include "enic.h" + +#define ENIC_NOTIFY_TIMER_PERIOD (2 * HZ) + +/* Supported devices */ +static struct pci_device_id enic_id_table[] = { + { PCI_VDEVICE(CISCO, 0x0043) }, + { 0, } /* end of table */ +}; + +MODULE_DESCRIPTION(DRV_DESCRIPTION); +MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>"); +MODULE_LICENSE("GPL"); +MODULE_VERSION(DRV_VERSION); +MODULE_DEVICE_TABLE(pci, enic_id_table); + +struct enic_stat { + char name[ETH_GSTRING_LEN]; + unsigned int offset; +}; + +#define ENIC_TX_STAT(stat) \ + { .name = #stat, .offset = offsetof(struct vnic_tx_stats, stat) / 8 } +#define ENIC_RX_STAT(stat) \ + { .name = #stat, .offset = offsetof(struct vnic_rx_stats, stat) / 8 } + +static const struct enic_stat enic_tx_stats[] = { + ENIC_TX_STAT(tx_frames_ok), + ENIC_TX_STAT(tx_unicast_frames_ok), + ENIC_TX_STAT(tx_multicast_frames_ok), + ENIC_TX_STAT(tx_broadcast_frames_ok), + ENIC_TX_STAT(tx_bytes_ok), + ENIC_TX_STAT(tx_unicast_bytes_ok), + ENIC_TX_STAT(tx_multicast_bytes_ok), + ENIC_TX_STAT(tx_broadcast_bytes_ok), + ENIC_TX_STAT(tx_drops), + ENIC_TX_STAT(tx_errors), + ENIC_TX_STAT(tx_tso), +}; + +static const struct enic_stat enic_rx_stats[] = { + ENIC_RX_STAT(rx_frames_ok), + ENIC_RX_STAT(rx_frames_total), + ENIC_RX_STAT(rx_unicast_frames_ok), + ENIC_RX_STAT(rx_multicast_frames_ok), + ENIC_RX_STAT(rx_broadcast_frames_ok), + ENIC_RX_STAT(rx_bytes_ok), + ENIC_RX_STAT(rx_unicast_bytes_ok), + ENIC_RX_STAT(rx_multicast_bytes_ok), + ENIC_RX_STAT(rx_broadcast_bytes_ok), + ENIC_RX_STAT(rx_drop), + ENIC_RX_STAT(rx_no_bufs), + ENIC_RX_STAT(rx_errors), + ENIC_RX_STAT(rx_rss), + ENIC_RX_STAT(rx_crc_errors), + ENIC_RX_STAT(rx_frames_64), + ENIC_RX_STAT(rx_frames_127), + ENIC_RX_STAT(rx_frames_255), + ENIC_RX_STAT(rx_frames_511), + ENIC_RX_STAT(rx_frames_1023), + ENIC_RX_STAT(rx_frames_1518), + ENIC_RX_STAT(rx_frames_to_max), +}; + +static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats); +static const unsigned int enic_n_rx_stats = ARRAY_SIZE(enic_rx_stats); + +static int enic_get_settings(struct net_device *netdev, + struct ethtool_cmd *ecmd) +{ + struct enic *enic = netdev_priv(netdev); + + ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE); + ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE); + ecmd->port = PORT_FIBRE; + ecmd->transceiver = XCVR_EXTERNAL; + + if (netif_carrier_ok(netdev)) { + ecmd->speed = vnic_dev_port_speed(enic->vdev); + ecmd->duplex = DUPLEX_FULL; + } else { + ecmd->speed = -1; + ecmd->duplex = -1; + } + + ecmd->autoneg = AUTONEG_DISABLE; + + return 0; +} + +static void enic_get_drvinfo(struct net_device *netdev, + struct ethtool_drvinfo *drvinfo) +{ + struct enic *enic = netdev_priv(netdev); + struct vnic_devcmd_fw_info *fw_info; + + spin_lock(&enic->devcmd_lock); + vnic_dev_fw_info(enic->vdev, &fw_info); + spin_unlock(&enic->devcmd_lock); + + strncpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver)); + strncpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version)); + strncpy(drvinfo->fw_version, fw_info->fw_version, + sizeof(drvinfo->fw_version)); + strncpy(drvinfo->bus_info, pci_name(enic->pdev), + sizeof(drvinfo->bus_info)); +} + +static void enic_get_strings(struct net_device *netdev, u32 stringset, u8 *data) +{ + unsigned int i; + + switch (stringset) { + case ETH_SS_STATS: + for (i = 0; i < enic_n_tx_stats; i++) { + memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN); + data += ETH_GSTRING_LEN; + } + for (i = 0; i < enic_n_rx_stats; i++) { + memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN); + data += ETH_GSTRING_LEN; + } + break; + } +} + +static int enic_get_sset_count(struct net_device *netdev, int sset) +{ + switch (sset) { + case ETH_SS_STATS: + return enic_n_tx_stats + enic_n_rx_stats; + default: + return -EOPNOTSUPP; + } +} + +static void enic_get_ethtool_stats(struct net_device *netdev, + struct ethtool_stats *stats, u64 *data) +{ + struct enic *enic = netdev_priv(netdev); + struct vnic_stats *vstats; + unsigned int i; + + spin_lock(&enic->devcmd_lock); + vnic_dev_stats_dump(enic->vdev, &vstats); + spin_unlock(&enic->devcmd_lock); + + for (i = 0; i < enic_n_tx_stats; i++) + *(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].offset]; + for (i = 0; i < enic_n_rx_stats; i++) + *(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].offset]; +} + +static u32 enic_get_rx_csum(struct net_device *netdev) +{ + struct enic *enic = netdev_priv(netdev); + return enic->csum_rx_enabled; +} + +static int enic_set_rx_csum(struct net_device *netdev, u32 data) +{ + struct enic *enic = netdev_priv(netdev); + + if (data && !ENIC_SETTING(enic, RXCSUM)) + return -EINVAL; + + enic->csum_rx_enabled = !!data; + + return 0; +} + +static int enic_set_tx_csum(struct net_device *netdev, u32 data) +{ + struct enic *enic = netdev_priv(netdev); + + if (data && !ENIC_SETTING(enic, TXCSUM)) + return -EINVAL; + + if (data) + netdev->features |= NETIF_F_HW_CSUM; + else + netdev->features &= ~NETIF_F_HW_CSUM; + + return 0; +} + +static int enic_set_tso(struct net_device *netdev, u32 data) +{ + struct enic *enic = netdev_priv(netdev); + + if (data && !ENIC_SETTING(enic, TSO)) + return -EINVAL; + + if (data) + netdev->features |= + NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN; + else + netdev->features &= + ~(NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN); + + return 0; +} + +static u32 enic_get_msglevel(struct net_device *netdev) +{ + struct enic *enic = netdev_priv(netdev); + return enic->msg_enable; +} + +static void enic_set_msglevel(struct net_device *netdev, u32 value) +{ + struct enic *enic = netdev_priv(netdev); + enic->msg_enable = value; +} + +static struct ethtool_ops enic_ethtool_ops = { + .get_settings = enic_get_settings, + .get_drvinfo = enic_get_drvinfo, + .get_msglevel = enic_get_msglevel, + .set_msglevel = enic_set_msglevel, + .get_link = ethtool_op_get_link, + .get_strings = enic_get_strings, + .get_sset_count = enic_get_sset_count, + .get_ethtool_stats = enic_get_ethtool_stats, + .get_rx_csum = enic_get_rx_csum, + .set_rx_csum = enic_set_rx_csum, + .get_tx_csum = ethtool_op_get_tx_csum, + .set_tx_csum = enic_set_tx_csum, + .get_sg = ethtool_op_get_sg, + .set_sg = ethtool_op_set_sg, + .get_tso = ethtool_op_get_tso, + .set_tso = enic_set_tso, +}; + +static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf) +{ + struct enic *enic = vnic_dev_priv(wq->vdev); + + if (buf->sop) + pci_unmap_single(enic->pdev, buf->dma_addr, + buf->len, PCI_DMA_TODEVICE); + else + pci_unmap_page(enic->pdev, buf->dma_addr, + buf->len, PCI_DMA_TODEVICE); + + if (buf->os_buf) + dev_kfree_skb_any(buf->os_buf); +} + +static void enic_wq_free_buf(struct vnic_wq *wq, + struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque) +{ + enic_free_wq_buf(wq, buf); +} + +static int enic_wq_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); + + spin_lock(&enic->wq_lock[q_number]); + + vnic_wq_service(&enic->wq[q_number], cq_desc, + completed_index, enic_wq_free_buf, + opaque); + + if (netif_queue_stopped(enic->netdev) && + vnic_wq_desc_avail(&enic->wq[q_number]) >= MAX_SKB_FRAGS + 1) + netif_wake_queue(enic->netdev); + + spin_unlock(&enic->wq_lock[q_number]); + + return 0; +} + +static void enic_log_q_error(struct enic *enic) +{ + unsigned int i; + u32 error_status; + + for (i = 0; i < enic->wq_count; i++) { + error_status = vnic_wq_error_status(&enic->wq[i]); + if (error_status) + printk(KERN_ERR PFX "%s: WQ[%d] error_status %d\n", + enic->netdev->name, i, error_status); + } + + for (i = 0; i < enic->rq_count; i++) { + error_status = vnic_rq_error_status(&enic->rq[i]); + if (error_status) + printk(KERN_ERR PFX "%s: RQ[%d] error_status %d\n", + enic->netdev->name, i, error_status); + } +} + +static void enic_link_check(struct enic *enic) +{ + int link_status = vnic_dev_link_status(enic->vdev); + int carrier_ok = netif_carrier_ok(enic->netdev); + + if (link_status && !carrier_ok) { + printk(KERN_INFO PFX "%s: Link UP\n", enic->netdev->name); + netif_carrier_on(enic->netdev); + } else if (!link_status && carrier_ok) { + printk(KERN_INFO PFX "%s: Link DOWN\n", enic->netdev->name); + netif_carrier_off(enic->netdev); + } +} + +static void enic_mtu_check(struct enic *enic) +{ + u32 mtu = vnic_dev_mtu(enic->vdev); + + if (mtu != enic->port_mtu) { + if (mtu < enic->netdev->mtu) + printk(KERN_WARNING PFX + "%s: interface MTU (%d) set higher " + "than switch port MTU (%d)\n", + enic->netdev->name, enic->netdev->mtu, mtu); + enic->port_mtu = mtu; + } +} + +static void enic_msglvl_check(struct enic *enic) +{ + u32 msg_enable = vnic_dev_msg_lvl(enic->vdev); + + if (msg_enable != enic->msg_enable) { + printk(KERN_INFO PFX "%s: msg lvl changed from 0x%x to 0x%x\n", + enic->netdev->name, enic->msg_enable, msg_enable); + enic->msg_enable = msg_enable; + } +} + +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); + u32 pba; + + vnic_intr_mask(&enic->intr[ENIC_INTX_WQ_RQ]); + + pba = vnic_intr_legacy_pba(enic->legacy_pba); + if (!pba) { + vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]); + return IRQ_NONE; /* not our interrupt */ + } + + if (ENIC_TEST_INTR(pba, ENIC_INTX_NOTIFY)) + enic_notify_check(enic); + + if (ENIC_TEST_INTR(pba, ENIC_INTX_ERR)) { + enic_log_q_error(enic); + /* schedule recovery from WQ/RQ error */ + schedule_work(&enic->reset); + return IRQ_HANDLED; + } + + if (ENIC_TEST_INTR(pba, ENIC_INTX_WQ_RQ)) { + if (netif_rx_schedule_prep(netdev, &enic->napi)) + __netif_rx_schedule(netdev, &enic->napi); + } else { + vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]); + } + + 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). + */ + + netif_rx_schedule(enic->netdev, &enic->napi); + + return IRQ_HANDLED; +} + +static irqreturn_t enic_isr_msix_rq(int irq, void *data) +{ + struct enic *enic = data; + + /* schedule NAPI polling for RQ cleanup */ + netif_rx_schedule(enic->netdev, &enic->napi); + + return IRQ_HANDLED; +} + +static irqreturn_t enic_isr_msix_wq(int irq, void *data) +{ + struct enic *enic = data; + unsigned int wq_work_to_do = -1; /* no limit */ + unsigned int wq_work_done; + + wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ], + wq_work_to_do, enic_wq_service, NULL); + + vnic_intr_return_credits(&enic->intr[ENIC_MSIX_WQ], + 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; + + 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; + + enic_notify_check(enic); + vnic_intr_unmask(&enic->intr[ENIC_MSIX_NOTIFY]); + + 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) +{ + 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? */ + } +} + +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) +{ + 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 */ + 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); + + if (!eop) + enic_queue_wq_skb_cont(enic, wq, skb, len_left); +} + +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) +{ + unsigned int head_len = skb_headlen(skb); + unsigned int len_left = skb->len - head_len; + unsigned int hdr_len = skb_transport_offset(skb); + unsigned int csum_offset = hdr_len + skb->csum_offset; + int eop = (len_left == 0); + + /* Queue the main skb fragment */ + 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); + + if (!eop) + enic_queue_wq_skb_cont(enic, wq, skb, len_left); +} + +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) +{ + unsigned int head_len = skb_headlen(skb); + unsigned int len_left = skb->len - head_len; + unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); + int eop = (len_left == 0); + + /* 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 == __constant_htons(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 == __constant_htons(ETH_P_IPV6)) { + tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, + &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); + } + + /* Queue the main skb fragment */ + enic_queue_wq_desc_tso(wq, skb, + pci_map_single(enic->pdev, skb->data, + head_len, PCI_DMA_TODEVICE), + head_len, + mss, hdr_len, + vlan_tag_insert, vlan_tag, + eop); + + if (!eop) + enic_queue_wq_skb_cont(enic, wq, skb, len_left); +} + +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; + + if (enic->vlan_group && vlan_tx_tag_present(skb)) { + /* VLAN tag from trunking driver */ + vlan_tag_insert = 1; + vlan_tag = vlan_tx_tag_get(skb); + } + + if (mss) + enic_queue_wq_skb_tso(enic, wq, skb, mss, + vlan_tag_insert, vlan_tag); + else if (skb->ip_summed == CHECKSUM_PARTIAL) + enic_queue_wq_skb_csum_l4(enic, wq, skb, + vlan_tag_insert, vlan_tag); + else + enic_queue_wq_skb_vlan(enic, wq, skb, + vlan_tag_insert, vlan_tag); +} + +/* netif_tx_lock held, process context with BHs disabled */ +static int 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 + 1) { + netif_stop_queue(netdev); + /* This is a hard error, log it */ + printk(KERN_ERR PFX "%s: BUG! Tx ring full when " + "queue awake!\n", netdev->name); + 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 + 1) + netif_stop_queue(netdev); + + netdev->trans_start = jiffies; + + 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; + + spin_lock(&enic->devcmd_lock); + vnic_dev_stats_dump(enic->vdev, &stats); + spin_unlock(&enic->devcmd_lock); + + 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_crc_errors = stats->rx.rx_crc_errors; + net_stats->rx_dropped = stats->rx.rx_no_bufs; + + return net_stats; +} + +static void enic_reset_mcaddrs(struct enic *enic) +{ + enic->mc_count = 0; +} + +static int enic_set_mac_addr(struct net_device *netdev, char *addr) +{ + if (!is_valid_ether_addr(addr)) + return -EADDRNOTAVAIL; + + memcpy(netdev->dev_addr, addr, netdev->addr_len); + + return 0; +} + +/* netif_tx_lock held, BHs disabled */ +static void enic_set_multicast_list(struct net_device *netdev) +{ + struct enic *enic = netdev_priv(netdev); + struct dev_mc_list *list = netdev->mc_list; + 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) ? 1 : 0; + int allmulti = (netdev->flags & IFF_ALLMULTI) || + (netdev->mc_count > ENIC_MULTICAST_PERFECT_FILTERS); + u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN]; + unsigned int mc_count = netdev->mc_count; + unsigned int i, j; + + if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS) + mc_count = ENIC_MULTICAST_PERFECT_FILTERS; + + spin_lock(&enic->devcmd_lock); + + vnic_dev_packet_filter(enic->vdev, directed, + multicast, broadcast, promisc, allmulti); + + /* 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. + */ + + for (i = 0; list && i < mc_count; i++) { + memcpy(mc_addr[i], list->dmi_addr, ETH_ALEN); + list = list->next; + } + + 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_del_multicast_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_add_multicast_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; + + spin_unlock(&enic->devcmd_lock); +} + +/* 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; +} + +/* rtnl lock is held */ +static void enic_vlan_rx_add_vid(struct net_device *netdev, u16 vid) +{ + struct enic *enic = netdev_priv(netdev); + + spin_lock(&enic->devcmd_lock); + enic_add_vlan(enic, vid); + spin_unlock(&enic->devcmd_lock); +} + +/* rtnl lock is held */ +static void enic_vlan_rx_kill_vid(struct net_device *netdev, u16 vid) +{ + struct enic *enic = netdev_priv(netdev); + + spin_lock(&enic->devcmd_lock); + enic_del_vlan(enic, vid); + spin_unlock(&enic->devcmd_lock); +} + +/* 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 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 inline struct sk_buff *enic_rq_alloc_skb(unsigned int size) +{ + struct sk_buff *skb; + + skb = dev_alloc_skb(size + NET_IP_ALIGN); + + if (skb) + skb_reserve(skb, NET_IP_ALIGN); + + return skb; +} + +static int enic_rq_alloc_buf(struct vnic_rq *rq) +{ + struct enic *enic = vnic_dev_priv(rq->vdev); + struct sk_buff *skb; + unsigned int len = enic->netdev->mtu + ETH_HLEN; + unsigned int os_buf_index = 0; + dma_addr_t dma_addr; + + skb = enic_rq_alloc_skb(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 int enic_get_skb_header(struct sk_buff *skb, void **iphdr, + void **tcph, u64 *hdr_flags, void *priv) +{ + struct cq_enet_rq_desc *cq_desc = priv; + unsigned int ip_len; + struct iphdr *iph; + + 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, checksum; + u32 rss_hash; + + cq_enet_rq_desc_dec(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, &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 (!(ipv4 && tcp && !ipv4_fragment)) + return -1; + + skb_reset_network_header(skb); + iph = ip_hdr(skb); + + ip_len = ip_hdrlen(skb); + skb_set_transport_header(skb, ip_len); + + /* check if ip header and tcp header are complete */ + if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb)) + return -1; + + *hdr_flags = LRO_IPV4 | LRO_TCP; + *tcph = tcp_hdr(skb); + *iphdr = iph; + + 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 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, 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, &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 (bytes_written > 0 && !fcs_ok) { + if (net_ratelimit()) + printk(KERN_ERR PFX + "%s: packet error: bad FCS\n", + enic->netdev->name); + } + + dev_kfree_skb_any(skb); + + return; + } + + if (eop && bytes_written > 0) { + + /* Good receive + */ + + skb_put(skb, bytes_written); + skb->protocol = eth_type_trans(skb, enic->netdev); + + if (enic->csum_rx_enabled && !csum_not_calc) { + skb->csum = htons(checksum); + skb->ip_summed = CHECKSUM_COMPLETE; + } + + skb->dev = enic->netdev; + enic->netdev->last_rx = jiffies; + + if (enic->vlan_group && vlan_stripped) { + + if (ENIC_SETTING(enic, LRO) && ipv4) + lro_vlan_hwaccel_receive_skb(&enic->lro_mgr, + skb, enic->vlan_group, + vlan, cq_desc); + else + vlan_hwaccel_receive_skb(skb, + enic->vlan_group, vlan); + + } else { + + if (ENIC_SETTING(enic, LRO) && ipv4) + lro_receive_skb(&enic->lro_mgr, skb, cq_desc); + 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 void enic_rq_drop_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 sk_buff *skb = buf->os_buf; + + if (skipped) + return; + + pci_unmap_single(enic->pdev, buf->dma_addr, + buf->len, PCI_DMA_FROMDEVICE); + + dev_kfree_skb_any(skb); +} + +static int enic_rq_service_drop(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_drop_buf, opaque); + + return 0; +} + +static int enic_poll(struct napi_struct *napi, int budget) +{ + struct enic *enic = container_of(napi, struct enic, napi); + struct net_device *netdev = enic->netdev; + 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; + + /* Service RQ (first) and WQ + */ + + rq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ], + rq_work_to_do, enic_rq_service, NULL); + + wq_work_done = vnic_cq_service(&enic->cq[ENIC_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[ENIC_INTX_WQ_RQ], + work_done, + 0 /* don't unmask intr */, + 0 /* don't reset intr timer */); + + if (rq_work_done > 0) { + + /* Replenish RQ + */ + + vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf); + + } else { + + /* If no work done, flush all LROs and exit polling + */ + + if (ENIC_SETTING(enic, LRO)) + lro_flush_all(&enic->lro_mgr); + + netif_rx_complete(netdev, napi); + vnic_intr_unmask(&enic->intr[ENIC_MSIX_RQ]); + } + + return rq_work_done; +} + +static int enic_poll_msix(struct napi_struct *napi, int budget) +{ + struct enic *enic = container_of(napi, struct enic, napi); + struct net_device *netdev = enic->netdev; + unsigned int work_to_do = budget; + unsigned int work_done; + + /* Service RQ + */ + + work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ], + work_to_do, enic_rq_service, NULL); + + if (work_done > 0) { + + /* Replenish RQ + */ + + vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf); + + /* Accumulate intr event credits for this polling + * cycle. An intr event is the completion of a + * a WQ or RQ packet. + */ + + vnic_intr_return_credits(&enic->intr[ENIC_MSIX_RQ], + work_done, + 0 /* don't unmask intr */, + 0 /* don't reset intr timer */); + } else { + + /* If no work done, flush all LROs and exit polling + */ + + if (ENIC_SETTING(enic, LRO)) + lro_flush_all(&enic->lro_mgr); + + netif_rx_complete(netdev, napi); + vnic_intr_unmask(&enic->intr[ENIC_MSIX_RQ]); + } + + 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; + 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: + + sprintf(enic->msix[ENIC_MSIX_RQ].devname, + "%.11s-rx-0", netdev->name); + enic->msix[ENIC_MSIX_RQ].isr = enic_isr_msix_rq; + enic->msix[ENIC_MSIX_RQ].devid = enic; + + sprintf(enic->msix[ENIC_MSIX_WQ].devname, + "%.11s-tx-0", netdev->name); + enic->msix[ENIC_MSIX_WQ].isr = enic_isr_msix_wq; + enic->msix[ENIC_MSIX_WQ].devid = enic; + + sprintf(enic->msix[ENIC_MSIX_ERR].devname, + "%.11s-err", netdev->name); + enic->msix[ENIC_MSIX_ERR].isr = enic_isr_msix_err; + enic->msix[ENIC_MSIX_ERR].devid = enic; + + sprintf(enic->msix[ENIC_MSIX_NOTIFY].devname, + "%.11s-notify", netdev->name); + enic->msix[ENIC_MSIX_NOTIFY].isr = enic_isr_msix_notify; + enic->msix[ENIC_MSIX_NOTIFY].devid = enic; + + for (i = 0; i < ARRAY_SIZE(enic->msix); 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 int enic_notify_set(struct enic *enic) +{ + int err; + + switch (vnic_dev_get_intr_mode(enic->vdev)) { + case VNIC_DEV_INTR_MODE_INTX: + err = vnic_dev_notify_set(enic->vdev, ENIC_INTX_NOTIFY); + break; + case VNIC_DEV_INTR_MODE_MSIX: + err = vnic_dev_notify_set(enic->vdev, ENIC_MSIX_NOTIFY); + break; + default: + err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */); + break; + } + + 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) { + printk(KERN_ERR PFX "%s: Unable to request irq.\n", + netdev->name); + return err; + } + + err = enic_notify_set(enic); + if (err) { + printk(KERN_ERR PFX + "%s: Failed to alloc notify buffer, aborting.\n", + netdev->name); + goto err_out_free_intr; + } + + for (i = 0; i < enic->rq_count; i++) { + err = vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf); + if (err) { + printk(KERN_ERR PFX + "%s: Unable to alloc receive buffers.\n", + netdev->name); + 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]); + + enic_add_station_addr(enic); + enic_set_multicast_list(netdev); + + netif_wake_queue(netdev); + napi_enable(&enic->napi); + vnic_dev_enable(enic->vdev); + + 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: + vnic_dev_notify_unset(enic->vdev); +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; + + del_timer_sync(&enic->notify_timer); + + vnic_dev_disable(enic->vdev); + napi_disable(&enic->napi); + netif_stop_queue(netdev); + + for (i = 0; i < enic->intr_count; i++) + vnic_intr_mask(&enic->intr[i]); + + 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; + } + + vnic_dev_notify_unset(enic->vdev); + enic_free_intr(enic); + + (void)vnic_cq_service(&enic->cq[ENIC_CQ_RQ], + -1, enic_rq_service_drop, NULL); + (void)vnic_cq_service(&enic->cq[ENIC_CQ_WQ], + -1, enic_wq_service, NULL); + + 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) + printk(KERN_WARNING PFX + "%s: interface MTU (%d) set higher " + "than port MTU (%d)\n", + netdev->name, 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; + + switch (vnic_dev_get_intr_mode(vdev)) { + case VNIC_DEV_INTR_MODE_MSIX: + enic_isr_msix_rq(enic->pdev->irq, enic); + enic_isr_msix_wq(enic->pdev->irq, 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) + printk(KERN_ERR PFX + "vNIC device open failed, err %d.\n", err); + + return err; +} + +static int enic_dev_soft_reset(struct enic *enic) +{ + int err; + + err = enic_dev_wait(enic->vdev, vnic_dev_soft_reset, + vnic_dev_soft_reset_done, 0); + if (err) + printk(KERN_ERR PFX + "vNIC soft reset failed, err %d.\n", err); + + return err; +} + +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(); + + spin_lock(&enic->devcmd_lock); + vnic_dev_hang_notify(enic->vdev); + spin_unlock(&enic->devcmd_lock); + + enic_stop(enic->netdev); + enic_dev_soft_reset(enic); + enic_reset_mcaddrs(enic); + enic_init_vnic_resources(enic); + enic_open(enic->netdev); + + rtnl_unlock(); +} + +static int enic_set_intr_mode(struct enic *enic) +{ + unsigned int n = ARRAY_SIZE(enic->rq); + unsigned int m = ARRAY_SIZE(enic->wq); + unsigned int i; + + /* Set interrupt mode (INTx, MSI, MSI-X) depending + * 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; + + if (enic->config.intr_mode < 1 && + enic->rq_count >= n && + enic->wq_count >= m && + enic->cq_count >= n + m && + enic->intr_count >= n + m + 2 && + !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; + } + + /* 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 void enic_iounmap(struct enic *enic) +{ + if (enic->bar0.vaddr) + iounmap(enic->bar0.vaddr); +} + +static int __devinit enic_probe(struct pci_dev *pdev, + const struct pci_device_id *ent) +{ + struct net_device *netdev; + struct enic *enic; + int using_dac = 0; + unsigned int i; + int err; + + const u8 rss_default_cpu = 0; + const u8 rss_hash_type = 0; + const u8 rss_hash_bits = 0; + const u8 rss_base_cpu = 0; + const u8 rss_enable = 0; + const u8 tso_ipid_split_en = 0; + const u8 ig_vlan_strip_en = 1; + + /* Allocate net device structure and initialize. Private + * instance data is initialized to zero. + */ + + netdev = alloc_etherdev(sizeof(struct enic)); + if (!netdev) { + printk(KERN_ERR PFX "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(pdev); + if (err) { + printk(KERN_ERR PFX + "Cannot enable PCI device, aborting.\n"); + goto err_out_free_netdev; + } + + err = pci_request_regions(pdev, DRV_NAME); + if (err) { + printk(KERN_ERR PFX + "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_40BIT_MASK); + if (err) { + err = pci_set_dma_mask(pdev, DMA_32BIT_MASK); + if (err) { + printk(KERN_ERR PFX + "No usable DMA configuration, aborting.\n"); + goto err_out_release_regions; + } + err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK); + if (err) { + printk(KERN_ERR PFX + "Unable to obtain 32-bit DMA " + "for consistent allocations, aborting.\n"); + goto err_out_release_regions; + } + } else { + err = pci_set_consistent_dma_mask(pdev, DMA_40BIT_MASK); + if (err) { + printk(KERN_ERR PFX + "Unable to obtain 40-bit DMA " + "for consistent allocations, aborting.\n"); + goto err_out_release_regions; + } + using_dac = 1; + } + + /* Map vNIC resources from BAR0 + */ + + if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) { + printk(KERN_ERR PFX + "BAR0 not memory-map'able, aborting.\n"); + err = -ENODEV; + goto err_out_release_regions; + } + + enic->bar0.vaddr = pci_iomap(pdev, 0, enic->bar0.len); + enic->bar0.bus_addr = pci_resource_start(pdev, 0); + enic->bar0.len = pci_resource_len(pdev, 0); + + if (!enic->bar0.vaddr) { + printk(KERN_ERR PFX + "Cannot memory-map BAR0 res hdr, aborting.\n"); + err = -ENODEV; + goto err_out_release_regions; + } + + /* Register vNIC device + */ + + enic->vdev = vnic_dev_register(NULL, enic, pdev, &enic->bar0); + if (!enic->vdev) { + printk(KERN_ERR PFX + "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) { + printk(KERN_ERR PFX + "vNIC dev open failed, aborting.\n"); + goto err_out_vnic_unregister; + } + + /* 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); + + err = vnic_dev_init(enic->vdev, 0); + if (err) { + printk(KERN_ERR PFX + "vNIC dev init failed, aborting.\n"); + goto err_out_dev_close; + } + + /* Get vNIC configuration + */ + + err = enic_get_vnic_config(enic); + if (err) { + printk(KERN_ERR PFX + "Get vNIC configuration failed, aborting.\n"); + goto err_out_dev_close; + } + + /* 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) { + printk(KERN_ERR PFX + "Failed to set intr mode, aborting.\n"); + goto err_out_dev_close; + } + + /* Allocate and configure vNIC resources + */ + + err = enic_alloc_vnic_resources(enic); + if (err) { + printk(KERN_ERR PFX + "Failed to alloc vNIC resources, aborting.\n"); + goto err_out_free_vnic_resources; + } + + enic_init_vnic_resources(enic); + + /* Enable VLAN tag stripping. RSS not enabled (yet). + */ + + 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); + if (err) { + printk(KERN_ERR PFX + "Failed to config nic, aborting.\n"); + goto err_out_free_vnic_resources; + } + + /* Setup notification timer, HW reset task, and 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]); + + spin_lock_init(&enic->devcmd_lock); + + /* 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) { + printk(KERN_ERR PFX + "Invalid MAC address, aborting.\n"); + goto err_out_free_vnic_resources; + } + + netdev->open = enic_open; + netdev->stop = enic_stop; + netdev->hard_start_xmit = enic_hard_start_xmit; + netdev->get_stats = enic_get_stats; + netdev->set_multicast_list = enic_set_multicast_list; + netdev->change_mtu = enic_change_mtu; + netdev->vlan_rx_register = enic_vlan_rx_register; + netdev->vlan_rx_add_vid = enic_vlan_rx_add_vid; + netdev->vlan_rx_kill_vid = enic_vlan_rx_kill_vid; + netdev->tx_timeout = enic_tx_timeout; + netdev->watchdog_timeo = 2 * HZ; + netdev->ethtool_ops = &enic_ethtool_ops; +#ifdef CONFIG_NET_POLL_CONTROLLER + netdev->poll_controller = enic_poll_controller; +#endif + + switch (vnic_dev_get_intr_mode(enic->vdev)) { + default: + netif_napi_add(netdev, &enic->napi, enic_poll, 64); + break; + case VNIC_DEV_INTR_MODE_MSIX: + netif_napi_add(netdev, &enic->napi, enic_poll_msix, 64); + break; + } + + netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX; + if (ENIC_SETTING(enic, TXCSUM)) + netdev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; + if (ENIC_SETTING(enic, TSO)) + netdev->features |= NETIF_F_TSO | + NETIF_F_TSO6 | NETIF_F_TSO_ECN; + if (using_dac) + netdev->features |= NETIF_F_HIGHDMA; + + + enic->csum_rx_enabled = ENIC_SETTING(enic, RXCSUM); + + if (ENIC_SETTING(enic, LRO)) { + enic->lro_mgr.max_aggr = ENIC_LRO_MAX_AGGR; + enic->lro_mgr.max_desc = ENIC_LRO_MAX_DESC; + enic->lro_mgr.lro_arr = enic->lro_desc; + enic->lro_mgr.get_skb_header = enic_get_skb_header; + enic->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID; + enic->lro_mgr.dev = netdev; + enic->lro_mgr.ip_summed = CHECKSUM_COMPLETE; + enic->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY; + } + + err = register_netdev(netdev); + if (err) { + printk(KERN_ERR PFX + "Cannot register net device, aborting.\n"); + goto err_out_free_vnic_resources; + } + + return 0; + +err_out_free_vnic_resources: + enic_free_vnic_resources(enic); +err_out_dev_close: + vnic_dev_close(enic->vdev); +err_out_vnic_unregister: + enic_clear_intr_mode(enic); + 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); + + flush_scheduled_work(); + unregister_netdev(netdev); + enic_free_vnic_resources(enic); + vnic_dev_close(enic->vdev); + enic_clear_intr_mode(enic); + 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) +{ + printk(KERN_INFO PFX "%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); |
