diff options
Diffstat (limited to 'drivers/net/enic/enic_main.c')
| -rw-r--r-- | drivers/net/enic/enic_main.c | 2084 |
1 files changed, 0 insertions, 2084 deletions
diff --git a/drivers/net/enic/enic_main.c b/drivers/net/enic/enic_main.c deleted file mode 100644 index f875751af15..00000000000 --- a/drivers/net/enic/enic_main.c +++ /dev/null @@ -1,2084 +0,0 @@ -/* - * 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) -#define WQ_ENET_MAX_DESC_LEN (1 << WQ_ENET_LEN_BITS) -#define MAX_TSO (1 << 16) -#define ENIC_DESC_MAX_SPLITS (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1) - -#define PCI_DEVICE_ID_CISCO_VIC_ENET 0x0043 /* ethernet vnic */ - -/* Supported devices */ -static struct pci_device_id enic_id_table[] = { - { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) }, - { 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 const 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, - .get_flags = ethtool_op_get_flags, - .set_flags = ethtool_op_set_flags, -}; - -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 + ENIC_DESC_MAX_SPLITS)) - 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 && 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)) { - vnic_intr_return_all_credits(&enic->intr[ENIC_INTX_NOTIFY]); - enic_notify_check(enic); - } - - if (ENIC_TEST_INTR(pba, ENIC_INTX_ERR)) { - vnic_intr_return_all_credits(&enic->intr[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 (napi_schedule_prep(&enic->napi)) - __napi_schedule(&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). - */ - - napi_schedule(&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 */ - napi_schedule(&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; - - vnic_intr_return_all_credits(&enic->intr[ENIC_MSIX_ERR]); - - 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; - - vnic_intr_return_all_credits(&enic->intr[ENIC_MSIX_NOTIFY]); - 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) -{ - 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. 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); - - 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. 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); - - 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 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)); - 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? */ - 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; - - 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, 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 */ - 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 + 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; - - 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_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; -} - -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 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 + 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 int enic_rq_alloc_buf_a1(struct vnic_rq *rq) -{ - struct rq_enet_desc *desc = vnic_rq_next_desc(rq); - - if (vnic_rq_posting_soon(rq)) { - - /* SW workaround for A0 HW erratum: if we're just about - * to write posted_index, insert a dummy desc - * of type resvd - */ - - rq_enet_desc_enc(desc, 0, RQ_ENET_TYPE_RESV2, 0); - vnic_rq_post(rq, 0, 0, 0, 0); - } else { - return enic_rq_alloc_buf(rq); - } - - return 0; -} - -static int enic_set_rq_alloc_buf(struct enic *enic) -{ - enum vnic_dev_hw_version hw_ver; - int err; - - err = vnic_dev_hw_version(enic->vdev, &hw_ver); - if (err) - return err; - - switch (hw_ver) { - case VNIC_DEV_HW_VER_A1: - enic->rq_alloc_buf = enic_rq_alloc_buf_a1; - break; - case VNIC_DEV_HW_VER_A2: - case VNIC_DEV_HW_VER_UNKNOWN: - enic->rq_alloc_buf = enic_rq_alloc_buf; - break; - default: - return -ENODEV; - } - - 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 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, 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 (!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 (enic->csum_rx_enabled && !csum_not_calc) { - skb->csum = htons(checksum); - skb->ip_summed = CHECKSUM_COMPLETE; - } - - skb->dev = netdev; - - if (enic->vlan_group && vlan_stripped) { - - if ((netdev->features & NETIF_F_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 ((netdev->features & NETIF_F_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 (netdev->features & NETIF_F_LRO) - lro_flush_all(&enic->lro_mgr); - - napi_complete(napi); - vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_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); - - /* Return intr event credits for this polling - * cycle. An intr event is the completion of a - * 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 (netdev->features & NETIF_F_LRO) - lro_flush_all(&enic->lro_mgr); - - napi_complete(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; - - 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_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; - } - 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) { - 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]); - - spin_lock(&enic->devcmd_lock); - enic_add_station_addr(enic); - spin_unlock(&enic->devcmd_lock); - enic_set_multicast_list(netdev); - - netif_wake_queue(netdev); - napi_enable(&enic->napi); - spin_lock(&enic->devcmd_lock); - vnic_dev_enable(enic->vdev); - spin_unlock(&enic->devcmd_lock); - - 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: - spin_lock(&enic->devcmd_lock); - vnic_dev_notify_unset(enic->vdev); - spin_unlock(&enic->devcmd_lock); -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); - - spin_lock(&enic->devcmd_lock); - vnic_dev_disable(enic->vdev); - spin_unlock(&enic->devcmd_lock); - 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; - } - - spin_lock(&enic->devcmd_lock); - vnic_dev_notify_unset(enic->vdev); - spin_unlock(&enic->devcmd_lock); - 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 int enic_set_niccfg(struct enic *enic) -{ - 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; - - /* Enable VLAN tag stripping. RSS not enabled (yet). - */ - - return 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); -} - -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); - vnic_dev_init(enic->vdev, 0); - enic_reset_mcaddrs(enic); - enic_init_vnic_resources(enic); - enic_set_niccfg(enic); - enic_open(enic->netdev); - - rtnl_unlock(); -} - -static int enic_set_intr_mode(struct enic *enic) -{ - unsigned int n = 1; - unsigned int m = 1; - 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 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 = eth_mac_addr, - .ndo_set_multicast_list = enic_set_multicast_list, - .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 -}; - -void enic_dev_deinit(struct enic *enic) -{ - netif_napi_del(&enic->napi); - enic_free_vnic_resources(enic); - enic_clear_intr_mode(enic); -} - -int enic_dev_init(struct enic *enic) -{ - struct net_device *netdev = enic->netdev; - int err; - - /* Get vNIC configuration - */ - - err = enic_get_vnic_config(enic); - if (err) { - printk(KERN_ERR PFX - "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) { - printk(KERN_ERR PFX - "Failed to set intr mode, aborting.\n"); - return err; - } - - /* 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); - - err = enic_set_rq_alloc_buf(enic); - if (err) { - printk(KERN_ERR PFX - "Failed to set RQ buffer allocator, aborting.\n"); - goto err_out_free_vnic_resources; - } - - err = enic_set_niccfg(enic); - if (err) { - printk(KERN_ERR PFX - "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, enic_poll, 64); - break; - case VNIC_DEV_INTR_MODE_MSIX: - netif_napi_add(netdev, &enic->napi, 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 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) { - 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_BIT_MASK(40)); - if (err) { - err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); - 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_BIT_MASK(32)); - 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_BIT_MASK(40)); - 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 BAR0-5 - */ - - 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) { - printk(KERN_ERR PFX - "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) { - 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; - } - - err = enic_dev_init(enic); - if (err) { - printk(KERN_ERR PFX - "Device initialization failed, aborting.\n"); - goto err_out_dev_close; - } - - /* 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_dev_deinit; - } - - 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 | NETIF_F_HW_VLAN_FILTER; - 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 (ENIC_SETTING(enic, LRO)) - netdev->features |= NETIF_F_LRO; - if (using_dac) - netdev->features |= NETIF_F_HIGHDMA; - - enic->csum_rx_enabled = ENIC_SETTING(enic, RXCSUM); - - 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_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); - - flush_scheduled_work(); - 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) -{ - 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); |