/* * Copyright 2008-2010 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "cq_enet_desc.h" #include "vnic_dev.h" #include "vnic_intr.h" #include "vnic_stats.h" #include "vnic_vic.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 */ #define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN 0x0044 /* enet dynamic vnic */ /* Supported devices */ static DEFINE_PCI_DEVICE_TABLE(enic_id_table) = { { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) }, { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) }, { 0, } /* end of table */ }; MODULE_DESCRIPTION(DRV_DESCRIPTION); MODULE_AUTHOR("Scott Feldman "); 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_is_dynamic(struct enic *enic) { return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN; } 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 int enic_dev_fw_info(struct enic *enic, struct vnic_devcmd_fw_info **fw_info) { int err; spin_lock(&enic->devcmd_lock); err = vnic_dev_fw_info(enic->vdev, fw_info); spin_unlock(&enic->devcmd_lock); return err; } 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; enic_dev_fw_info(enic, &fw_info); 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 int enic_dev_stats_dump(struct enic *enic, struct vnic_stats **vstats) { int err; spin_lock(&enic->devcmd_lock); err = vnic_dev_stats_dump(enic->vdev, vstats); spin_unlock(&enic->devcmd_lock); return err; } 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; enic_dev_stats_dump(enic, &vstats); 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 int enic_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *ecmd) { struct enic *enic = netdev_priv(netdev); ecmd->tx_coalesce_usecs = enic->tx_coalesce_usecs; ecmd->rx_coalesce_usecs = enic->rx_coalesce_usecs; return 0; } static int enic_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *ecmd) { struct enic *enic = netdev_priv(netdev); u32 tx_coalesce_usecs; u32 rx_coalesce_usecs; tx_coalesce_usecs = min_t(u32, INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX), ecmd->tx_coalesce_usecs); rx_coalesce_usecs = min_t(u32, INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX), ecmd->rx_coalesce_usecs); switch (vnic_dev_get_intr_mode(enic->vdev)) { case VNIC_DEV_INTR_MODE_INTX: if (tx_coalesce_usecs != rx_coalesce_usecs) return -EINVAL; vnic_intr_coalescing_timer_set(&enic->intr[ENIC_INTX_WQ_RQ], INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs)); break; case VNIC_DEV_INTR_MODE_MSI: if (tx_coalesce_usecs != rx_coalesce_usecs) return -EINVAL; vnic_intr_coalescing_timer_set(&enic->intr[0], INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs)); break; case VNIC_DEV_INTR_MODE_MSIX: vnic_intr_coalescing_timer_set(&enic->intr[ENIC_MSIX_WQ], INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs)); vnic_intr_coalescing_timer_set(&enic->intr[ENIC_MSIX_RQ], INTR_COALESCE_USEC_TO_HW(rx_coalesce_usecs)); break; default: break; } enic->tx_coalesce_usecs = tx_coalesce_usecs; enic->rx_coalesce_usecs = rx_coalesce_usecs; return 0; } 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_coalesce = enic_get_coalesce, .set_coalesce = enic_set_coalesce, .get_flags = ethtool_op_get_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) netdev_err(enic->netdev, "WQ[%d] error_status %d\n", i, error_status); } for (i = 0; i < enic->rq_count; i++) { error_status = vnic_rq_error_status(&enic->rq[i]); if (error_status) netdev_err(enic->netdev, "RQ[%d] error_status %d\n", i, error_status); } } static void enic_msglvl_check(struct enic *enic) { u32 msg_enable = vnic_dev_msg_lvl(enic->vdev); if (msg_enable != enic->msg_enable) { netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n", enic->msg_enable, msg_enable); enic->msg_enable = msg_enable; } } static void enic_mtu_check(struct enic *enic) { u32 mtu = vnic_dev_mtu(enic->vdev); struct net_device *netdev = enic->netdev; if (mtu && mtu != enic->port_mtu) { enic->port_mtu = mtu; if (mtu < netdev->mtu) netdev_warn(netdev, "interface MTU (%d) set higher " "than switch port MTU (%d)\n", netdev->mtu, mtu); } } 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) { netdev_info(enic->netdev, "Link UP\n"); netif_carrier_on(enic->netdev); } else if (!link_status && carrier_ok) { netdev_info(enic->netdev, "Link DOWN\n"); netif_carrier_off(enic->netdev); } } static void enic_notify_check(struct enic *enic) { enic_msglvl_check(enic); enic_mtu_check(enic); enic_link_check(enic); } #define ENIC_TEST_INTR(pba, i) (pba & (1 << i)) static irqreturn_t enic_isr_legacy(int irq, void *data) { struct net_device *netdev = data; struct enic *enic = netdev_priv(netdev); 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, int loopback) { skb_frag_t *frag; /* Queue additional data fragments */ for (frag = skb_shinfo(skb)->frags; len_left; frag++) { len_left -= frag->size; enic_queue_wq_desc_cont(wq, skb, pci_map_page(enic->pdev, frag->page, frag->page_offset, frag->size, PCI_DMA_TODEVICE), frag->size, (len_left == 0), /* EOP? */ loopback); } } static inline void enic_queue_wq_skb_vlan(struct enic *enic, struct vnic_wq *wq, struct sk_buff *skb, int vlan_tag_insert, unsigned int vlan_tag, int loopback) { unsigned int head_len = skb_headlen(skb); unsigned int len_left = skb->len - head_len; int eop = (len_left == 0); /* Queue the main skb fragment. The fragments are no larger * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor * per fragment is queued. */ enic_queue_wq_desc(wq, skb, pci_map_single(enic->pdev, skb->data, head_len, PCI_DMA_TODEVICE), head_len, vlan_tag_insert, vlan_tag, eop, loopback); if (!eop) enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback); } static inline void enic_queue_wq_skb_csum_l4(struct enic *enic, struct vnic_wq *wq, struct sk_buff *skb, int vlan_tag_insert, unsigned int vlan_tag, int loopback) { unsigned int head_len = skb_headlen(skb); unsigned int len_left = skb->len - head_len; unsigned int hdr_len = skb_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, loopback); if (!eop) enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback); } static inline void enic_queue_wq_skb_tso(struct enic *enic, struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss, int vlan_tag_insert, unsigned int vlan_tag, int loopback) { unsigned int frag_len_left = skb_headlen(skb); unsigned int len_left = skb->len - frag_len_left; unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); int eop = (len_left == 0); unsigned int len; dma_addr_t dma_addr; unsigned int offset = 0; skb_frag_t *frag; /* Preload TCP csum field with IP pseudo hdr calculated * with IP length set to zero. HW will later add in length * to each TCP segment resulting from the TSO. */ if (skb->protocol == cpu_to_be16(ETH_P_IP)) { ip_hdr(skb)->check = 0; tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr, ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) { tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); } /* Queue WQ_ENET_MAX_DESC_LEN length descriptors * for the main skb fragment */ while (frag_len_left) { len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN); dma_addr = pci_map_single(enic->pdev, skb->data + offset, len, PCI_DMA_TODEVICE); enic_queue_wq_desc_tso(wq, skb, dma_addr, len, mss, hdr_len, vlan_tag_insert, vlan_tag, eop && (len == frag_len_left), loopback); frag_len_left -= len; offset += len; } if (eop) return; /* Queue WQ_ENET_MAX_DESC_LEN length descriptors * for additional data fragments */ for (frag = skb_shinfo(skb)->frags; len_left; frag++) { len_left -= frag->size; frag_len_left = frag->size; offset = frag->page_offset; while (frag_len_left) { len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN); dma_addr = pci_map_page(enic->pdev, frag->page, offset, len, PCI_DMA_TODEVICE); enic_queue_wq_desc_cont(wq, skb, dma_addr, len, (len_left == 0) && (len == frag_len_left), /* EOP? */ loopback); frag_len_left -= len; offset += len; } } } static inline void enic_queue_wq_skb(struct enic *enic, struct vnic_wq *wq, struct sk_buff *skb) { unsigned int mss = skb_shinfo(skb)->gso_size; unsigned int vlan_tag = 0; int vlan_tag_insert = 0; int loopback = 0; if (enic->vlan_group && vlan_tx_tag_present(skb)) { /* VLAN tag from trunking driver */ vlan_tag_insert = 1; vlan_tag = vlan_tx_tag_get(skb); } else if (enic->loop_enable) { vlan_tag = enic->loop_tag; loopback = 1; } if (mss) enic_queue_wq_skb_tso(enic, wq, skb, mss, vlan_tag_insert, vlan_tag, loopback); else if (skb->ip_summed == CHECKSUM_PARTIAL) enic_queue_wq_skb_csum_l4(enic, wq, skb, vlan_tag_insert, vlan_tag, loopback); else enic_queue_wq_skb_vlan(enic, wq, skb, vlan_tag_insert, vlan_tag, loopback); } /* netif_tx_lock held, process context with BHs disabled, or BH */ static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb, struct net_device *netdev) { struct enic *enic = netdev_priv(netdev); struct vnic_wq *wq = &enic->wq[0]; unsigned long flags; if (skb->len <= 0) { dev_kfree_skb(skb); return NETDEV_TX_OK; } /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs, * which is very likely. In the off chance it's going to take * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb. */ if (skb_shinfo(skb)->gso_size == 0 && skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC && skb_linearize(skb)) { dev_kfree_skb(skb); return NETDEV_TX_OK; } spin_lock_irqsave(&enic->wq_lock[0], flags); if (vnic_wq_desc_avail(wq) < skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) { netif_stop_queue(netdev); /* This is a hard error, log it */ netdev_err(netdev, "BUG! Tx ring full when queue awake!\n"); spin_unlock_irqrestore(&enic->wq_lock[0], flags); return NETDEV_TX_BUSY; } enic_queue_wq_skb(enic, wq, skb); if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS) netif_stop_queue(netdev); spin_unlock_irqrestore(&enic->wq_lock[0], flags); return NETDEV_TX_OK; } /* dev_base_lock rwlock held, nominally process context */ static struct net_device_stats *enic_get_stats(struct net_device *netdev) { struct enic *enic = netdev_priv(netdev); struct net_device_stats *net_stats = &netdev->stats; struct vnic_stats *stats; enic_dev_stats_dump(enic, &stats); net_stats->tx_packets = stats->tx.tx_frames_ok; net_stats->tx_bytes = stats->tx.tx_bytes_ok; net_stats->tx_errors = stats->tx.tx_errors; net_stats->tx_dropped = stats->tx.tx_drops; net_stats->rx_packets = stats->rx.rx_frames_ok; net_stats->rx_bytes = stats->rx.rx_bytes_ok; net_stats->rx_errors = stats->rx.rx_errors; net_stats->multicast = stats->rx.rx_multicast_frames_ok; net_stats->rx_over_errors = enic->rq_truncated_pkts; net_stats->rx_crc_errors = enic->rq_bad_fcs; net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop; return net_stats; } static void enic_reset_multicast_list(struct enic *enic) { enic->mc_count = 0; enic->flags = 0; } static int enic_set_mac_addr(struct net_device *netdev, char *addr) { struct enic *enic = netdev_priv(netdev); if (enic_is_dynamic(enic)) { if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr)) return -EADDRNOTAVAIL; } else { if (!is_valid_ether_addr(addr)) return -EADDRNOTAVAIL; } memcpy(netdev->dev_addr, addr, netdev->addr_len); return 0; } static int enic_dev_add_station_addr(struct enic *enic) { int err = 0; if (is_valid_ether_addr(enic->netdev->dev_addr)) { spin_lock(&enic->devcmd_lock); err = vnic_dev_add_addr(enic->vdev, enic->netdev->dev_addr); spin_unlock(&enic->devcmd_lock); } return err; } static int enic_dev_del_station_addr(struct enic *enic) { int err = 0; if (is_valid_ether_addr(enic->netdev->dev_addr)) { spin_lock(&enic->devcmd_lock); err = vnic_dev_del_addr(enic->vdev, enic->netdev->dev_addr); spin_unlock(&enic->devcmd_lock); } return err; } static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p) { struct enic *enic = netdev_priv(netdev); struct sockaddr *saddr = p; char *addr = saddr->sa_data; int err; if (netif_running(enic->netdev)) { err = enic_dev_del_station_addr(enic); if (err) return err; } err = enic_set_mac_addr(netdev, addr); if (err) return err; if (netif_running(enic->netdev)) { err = enic_dev_add_station_addr(enic); if (err) return err; } return err; } static int enic_set_mac_address(struct net_device *netdev, void *p) { struct sockaddr *saddr = p; return enic_set_mac_addr(netdev, (char *)saddr->sa_data); } static int enic_dev_packet_filter(struct enic *enic, int directed, int multicast, int broadcast, int promisc, int allmulti) { int err; spin_lock(&enic->devcmd_lock); err = vnic_dev_packet_filter(enic->vdev, directed, multicast, broadcast, promisc, allmulti); spin_unlock(&enic->devcmd_lock); return err; } static int enic_dev_add_multicast_addr(struct enic *enic, u8 *addr) { int err; spin_lock(&enic->devcmd_lock); err = vnic_dev_add_addr(enic->vdev, addr); spin_unlock(&enic->devcmd_lock); return err; } static int enic_dev_del_multicast_addr(struct enic *enic, u8 *addr) { int err; spin_lock(&enic->devcmd_lock); err = vnic_dev_del_addr(enic->vdev, addr); spin_unlock(&enic->devcmd_lock); return err; } /* netif_tx_lock held, BHs disabled */ static void enic_set_multicast_list(struct net_device *netdev) { struct enic *enic = netdev_priv(netdev); struct netdev_hw_addr *ha; 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; unsigned int mc_count = netdev_mc_count(netdev); int allmulti = (netdev->flags & IFF_ALLMULTI) || mc_count > ENIC_MULTICAST_PERFECT_FILTERS; unsigned int flags = netdev->flags | (allmulti ? IFF_ALLMULTI : 0); u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN]; unsigned int i, j; if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS) mc_count = ENIC_MULTICAST_PERFECT_FILTERS; if (enic->flags != flags) { enic->flags = flags; enic_dev_packet_filter(enic, 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. */ i = 0; netdev_for_each_mc_addr(ha, netdev) { if (i == mc_count) break; memcpy(mc_addr[i++], ha->addr, ETH_ALEN); } for (i = 0; i < enic->mc_count; i++) { for (j = 0; j < mc_count; j++) if (compare_ether_addr(enic->mc_addr[i], mc_addr[j]) == 0) break; if (j == mc_count) enic_dev_del_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_dev_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; } /* 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 int enic_vnic_dev_deinit(struct enic *enic) { int err; spin_lock(&enic->devcmd_lock); err = vnic_dev_deinit(enic->vdev); spin_unlock(&enic->devcmd_lock); return err; } static int enic_dev_init_prov(struct enic *enic, struct vic_provinfo *vp) { int err; spin_lock(&enic->devcmd_lock); err = vnic_dev_init_prov(enic->vdev, (u8 *)vp, vic_provinfo_size(vp)); spin_unlock(&enic->devcmd_lock); return err; } static int enic_dev_init_done(struct enic *enic, int *done, int *error) { int err; spin_lock(&enic->devcmd_lock); err = vnic_dev_init_done(enic->vdev, done, error); spin_unlock(&enic->devcmd_lock); return err; } static int enic_set_port_profile(struct enic *enic, u8 *mac) { struct vic_provinfo *vp; u8 oui[3] = VIC_PROVINFO_CISCO_OUI; char uuid_str[38]; int err; err = enic_vnic_dev_deinit(enic); if (err) return err; switch (enic->pp.request) { case PORT_REQUEST_ASSOCIATE: if (!(enic->pp.set & ENIC_SET_NAME) || !strlen(enic->pp.name)) return -EINVAL; if (!is_valid_ether_addr(mac)) return -EADDRNOTAVAIL; vp = vic_provinfo_alloc(GFP_KERNEL, oui, VIC_PROVINFO_LINUX_TYPE); if (!vp) return -ENOMEM; vic_provinfo_add_tlv(vp, VIC_LINUX_PROV_TLV_PORT_PROFILE_NAME_STR, strlen(enic->pp.name) + 1, enic->pp.name); vic_provinfo_add_tlv(vp, VIC_LINUX_PROV_TLV_CLIENT_MAC_ADDR, ETH_ALEN, mac); if (enic->pp.set & ENIC_SET_INSTANCE) { sprintf(uuid_str, "%pUB", enic->pp.instance_uuid); vic_provinfo_add_tlv(vp, VIC_LINUX_PROV_TLV_CLIENT_UUID_STR, sizeof(uuid_str), uuid_str); } if (enic->pp.set & ENIC_SET_HOST) { sprintf(uuid_str, "%pUB", enic->pp.host_uuid); vic_provinfo_add_tlv(vp, VIC_LINUX_PROV_TLV_HOST_UUID_STR, sizeof(uuid_str), uuid_str); } err = enic_dev_init_prov(enic, vp); vic_provinfo_free(vp); if (err) return err; break; case PORT_REQUEST_DISASSOCIATE: break; default: return -EINVAL; } enic->pp.set |= ENIC_SET_APPLIED; return 0; } static int enic_set_vf_port(struct net_device *netdev, int vf, struct nlattr *port[]) { struct enic *enic = netdev_priv(netdev); memset(&enic->pp, 0, sizeof(enic->pp)); if (port[IFLA_PORT_REQUEST]) { enic->pp.set |= ENIC_SET_REQUEST; enic->pp.request = nla_get_u8(port[IFLA_PORT_REQUEST]); } if (port[IFLA_PORT_PROFILE]) { enic->pp.set |= ENIC_SET_NAME; memcpy(enic->pp.name, nla_data(port[IFLA_PORT_PROFILE]), PORT_PROFILE_MAX); } if (port[IFLA_PORT_INSTANCE_UUID]) { enic->pp.set |= ENIC_SET_INSTANCE; memcpy(enic->pp.instance_uuid, nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX); } if (port[IFLA_PORT_HOST_UUID]) { enic->pp.set |= ENIC_SET_HOST; memcpy(enic->pp.host_uuid, nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX); } /* don't support VFs, yet */ if (vf != PORT_SELF_VF) return -EOPNOTSUPP; if (!(enic->pp.set & ENIC_SET_REQUEST)) return -EOPNOTSUPP; if (enic->pp.request == PORT_REQUEST_ASSOCIATE) { /* If the interface mac addr hasn't been assigned, * assign a random mac addr before setting port- * profile. */ if (is_zero_ether_addr(netdev->dev_addr)) random_ether_addr(netdev->dev_addr); } return enic_set_port_profile(enic, netdev->dev_addr); } static int enic_get_vf_port(struct net_device *netdev, int vf, struct sk_buff *skb) { struct enic *enic = netdev_priv(netdev); int err, error, done; u16 response = PORT_PROFILE_RESPONSE_SUCCESS; if (!(enic->pp.set & ENIC_SET_APPLIED)) return -ENODATA; err = enic_dev_init_done(enic, &done, &error); if (err) error = err; switch (error) { case ERR_SUCCESS: if (!done) response = PORT_PROFILE_RESPONSE_INPROGRESS; break; case ERR_EINVAL: response = PORT_PROFILE_RESPONSE_INVALID; break; case ERR_EBADSTATE: response = PORT_PROFILE_RESPONSE_BADSTATE; break; case ERR_ENOMEM: response = PORT_PROFILE_RESPONSE_INSUFFICIENT_RESOURCES; break; default: response = PORT_PROFILE_RESPONSE_ERROR; break; } NLA_PUT_U16(skb, IFLA_PORT_REQUEST, enic->pp.request); NLA_PUT_U16(skb, IFLA_PORT_RESPONSE, response); if (enic->pp.set & ENIC_SET_NAME) NLA_PUT(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX, enic->pp.name); if (enic->pp.set & ENIC_SET_INSTANCE) NLA_PUT(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX, enic->pp.instance_uuid); if (enic->pp.set & ENIC_SET_HOST) NLA_PUT(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX, enic->pp.host_uuid); return 0; nla_put_failure: return -EMSGSIZE; } static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf) { struct enic *enic = vnic_dev_priv(rq->vdev); if (!buf->os_buf) return; pci_unmap_single(enic->pdev, buf->dma_addr, buf->len, PCI_DMA_FROMDEVICE); dev_kfree_skb_any(buf->os_buf); } static int enic_rq_alloc_buf(struct vnic_rq *rq) { struct enic *enic = vnic_dev_priv(rq->vdev); struct net_device *netdev = enic->netdev; struct sk_buff *skb; unsigned int len = netdev->mtu + VLAN_ETH_HLEN; unsigned int os_buf_index = 0; dma_addr_t dma_addr; skb = netdev_alloc_skb_ip_align(netdev, len); if (!skb) return -ENOMEM; dma_addr = pci_map_single(enic->pdev, skb->data, len, PCI_DMA_FROMDEVICE); enic_queue_rq_desc(rq, skb, os_buf_index, dma_addr, len); return 0; } static 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_dev_hw_version(struct enic *enic, enum vnic_dev_hw_version *hw_ver) { int err; spin_lock(&enic->devcmd_lock); err = vnic_dev_hw_version(enic->vdev, hw_ver); spin_unlock(&enic->devcmd_lock); return err; } static int enic_set_rq_alloc_buf(struct enic *enic) { enum vnic_dev_hw_version hw_ver; int err; err = enic_dev_hw_version(enic, &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 void enic_rq_indicate_buf(struct vnic_rq *rq, struct cq_desc *cq_desc, struct vnic_rq_buf *buf, int skipped, void *opaque) { struct enic *enic = vnic_dev_priv(rq->vdev); struct net_device *netdev = enic->netdev; struct sk_buff *skb; u8 type, color, eop, sop, ingress_port, vlan_stripped; u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof; u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok; u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc; u8 packet_error; u16 q_number, completed_index, bytes_written, vlan_tci, checksum; u32 rss_hash; if (skipped) return; skb = buf->os_buf; prefetch(skb->data - NET_IP_ALIGN); pci_unmap_single(enic->pdev, buf->dma_addr, buf->len, PCI_DMA_FROMDEVICE); cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc, &type, &color, &q_number, &completed_index, &ingress_port, &fcoe, &eop, &sop, &rss_type, &csum_not_calc, &rss_hash, &bytes_written, &packet_error, &vlan_stripped, &vlan_tci, &checksum, &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error, &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp, &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment, &fcs_ok); if (packet_error) { if (!fcs_ok) { if (bytes_written > 0) enic->rq_bad_fcs++; else if (bytes_written == 0) enic->rq_truncated_pkts++; } dev_kfree_skb_any(skb); return; } if (eop && bytes_written > 0) { /* Good receive */ skb_put(skb, bytes_written); skb->protocol = eth_type_trans(skb, netdev); if (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 && (vlan_tci & CQ_ENET_RQ_DESC_VLAN_TCI_VLAN_MASK)) { if (netdev->features & NETIF_F_GRO) vlan_gro_receive(&enic->napi, enic->vlan_group, vlan_tci, skb); else vlan_hwaccel_receive_skb(skb, enic->vlan_group, vlan_tci); } else { if (netdev->features & NETIF_F_GRO) napi_gro_receive(&enic->napi, skb); else netif_receive_skb(skb); } } else { /* Buffer overflow */ dev_kfree_skb_any(skb); } } static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc, u8 type, u16 q_number, u16 completed_index, void *opaque) { struct enic *enic = vnic_dev_priv(vdev); vnic_rq_service(&enic->rq[q_number], cq_desc, completed_index, VNIC_RQ_RETURN_DESC, enic_rq_indicate_buf, opaque); return 0; } static int enic_poll(struct napi_struct *napi, int budget) { struct enic *enic = container_of(napi, struct enic, napi); unsigned int rq_work_to_do = budget; unsigned int wq_work_to_do = -1; /* no limit */ unsigned int work_done, rq_work_done, wq_work_done; int err; /* Service RQ (first) and WQ */ rq_work_done = vnic_cq_service(&enic->cq[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 */); err = vnic_rq_fill(&enic->rq[0], enic->rq_alloc_buf); /* Buffer allocation failed. Stay in polling * mode so we can try to fill the ring again. */ if (err) rq_work_done = rq_work_to_do; if (rq_work_done < rq_work_to_do) { /* Some work done, but not enough to stay in polling, * exit polling */ napi_complete(napi); vnic_intr_unmask(&enic->intr[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); unsigned int work_to_do = budget; unsigned int work_done; int err; /* Service RQ */ work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ], work_to_do, enic_rq_service, NULL); /* Return intr event credits for this polling * cycle. An intr event is the completion of a * RQ packet. */ if (work_done > 0) vnic_intr_return_credits(&enic->intr[ENIC_MSIX_RQ], work_done, 0 /* don't unmask intr */, 0 /* don't reset intr timer */); err = vnic_rq_fill(&enic->rq[0], enic->rq_alloc_buf); /* Buffer allocation failed. Stay in polling mode * so we can try to fill the ring again. */ if (err) work_done = work_to_do; if (work_done < work_to_do) { /* Some work done, but not enough to stay in polling, * exit polling */ napi_complete(napi); vnic_intr_unmask(&enic->intr[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 void enic_synchronize_irqs(struct enic *enic) { unsigned int i; switch (vnic_dev_get_intr_mode(enic->vdev)) { case VNIC_DEV_INTR_MODE_INTX: case VNIC_DEV_INTR_MODE_MSI: synchronize_irq(enic->pdev->irq); break; case VNIC_DEV_INTR_MODE_MSIX: for (i = 0; i < enic->intr_count; i++) synchronize_irq(enic->msix_entry[i].vector); break; default: break; } } static int enic_dev_notify_set(struct enic *enic) { int err; spin_lock(&enic->devcmd_lock); switch (vnic_dev_get_intr_mode(enic->vdev)) { case VNIC_DEV_INTR_MODE_INTX: err = vnic_dev_notify_set(enic->vdev, ENIC_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 int enic_dev_notify_unset(struct enic *enic) { int err; spin_lock(&enic->devcmd_lock); err = vnic_dev_notify_unset(enic->vdev); spin_unlock(&enic->devcmd_lock); return err; } static int enic_dev_enable(struct enic *enic) { int err; spin_lock(&enic->devcmd_lock); err = vnic_dev_enable(enic->vdev); spin_unlock(&enic->devcmd_lock); return err; } static int enic_dev_disable(struct enic *enic) { int err; spin_lock(&enic->devcmd_lock); err = vnic_dev_disable(enic->vdev); spin_unlock(&enic->devcmd_lock); return err; } static void enic_notify_timer_start(struct enic *enic) { switch (vnic_dev_get_intr_mode(enic->vdev)) { case VNIC_DEV_INTR_MODE_MSI: mod_timer(&enic->notify_timer, jiffies); break; default: /* Using intr for notification for INTx/MSI-X */ break; }; } /* rtnl lock is held, process context */ static int enic_open(struct net_device *netdev) { struct enic *enic = netdev_priv(netdev); unsigned int i; int err; err = enic_request_intr(enic); if (err) { netdev_err(netdev, "Unable to request irq.\n"); return err; } err = enic_dev_notify_set(enic); if (err) { netdev_err(netdev, "Failed to alloc notify buffer, aborting.\n"); goto err_out_free_intr; } for (i = 0; i < enic->rq_count; i++) { vnic_rq_fill(&enic->rq[i], enic->rq_alloc_buf); /* Need at least one buffer on ring to get going */ if (vnic_rq_desc_used(&enic->rq[i]) == 0) { netdev_err(netdev, "Unable to alloc receive buffers\n"); err = -ENOMEM; goto err_out_notify_unset; } } for (i = 0; i < enic->wq_count; i++) vnic_wq_enable(&enic->wq[i]); for (i = 0; i < enic->rq_count; i++) vnic_rq_enable(&enic->rq[i]); enic_dev_add_station_addr(enic); enic_set_multicast_list(netdev); netif_wake_queue(netdev); napi_enable(&enic->napi); enic_dev_enable(enic); for (i = 0; i < enic->intr_count; i++) vnic_intr_unmask(&enic->intr[i]); enic_notify_timer_start(enic); return 0; err_out_notify_unset: enic_dev_notify_unset(enic); err_out_free_intr: enic_free_intr(enic); return err; } /* rtnl lock is held, process context */ static int enic_stop(struct net_device *netdev) { struct enic *enic = netdev_priv(netdev); unsigned int i; int err; for (i = 0; i < enic->intr_count; i++) { vnic_intr_mask(&enic->intr[i]); (void)vnic_intr_masked(&enic->intr[i]); /* flush write */ } enic_synchronize_irqs(enic); del_timer_sync(&enic->notify_timer); enic_dev_disable(enic); napi_disable(&enic->napi); netif_carrier_off(netdev); netif_tx_disable(netdev); enic_dev_del_station_addr(enic); for (i = 0; i < enic->wq_count; i++) { err = vnic_wq_disable(&enic->wq[i]); if (err) return err; } for (i = 0; i < enic->rq_count; i++) { err = vnic_rq_disable(&enic->rq[i]); if (err) return err; } enic_dev_notify_unset(enic); enic_free_intr(enic); for (i = 0; i < enic->wq_count; i++) vnic_wq_clean(&enic->wq[i], enic_free_wq_buf); for (i = 0; i < enic->rq_count; i++) vnic_rq_clean(&enic->rq[i], enic_free_rq_buf); for (i = 0; i < enic->cq_count; i++) vnic_cq_clean(&enic->cq[i]); for (i = 0; i < enic->intr_count; i++) vnic_intr_clean(&enic->intr[i]); return 0; } static int enic_change_mtu(struct net_device *netdev, int new_mtu) { struct enic *enic = netdev_priv(netdev); int running = netif_running(netdev); if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU) return -EINVAL; if (running) enic_stop(netdev); netdev->mtu = new_mtu; if (netdev->mtu > enic->port_mtu) netdev_warn(netdev, "interface MTU (%d) set higher than port MTU (%d)\n", netdev->mtu, enic->port_mtu); if (running) enic_open(netdev); return 0; } #ifdef CONFIG_NET_POLL_CONTROLLER static void enic_poll_controller(struct net_device *netdev) { struct enic *enic = netdev_priv(netdev); struct vnic_dev *vdev = enic->vdev; 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) dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n", err); return err; } static int enic_dev_hang_reset(struct enic *enic) { int err; err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset, vnic_dev_hang_reset_done, 0); if (err) netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n", err); return err; } static int enic_set_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; int err; /* Enable VLAN tag stripping. RSS not enabled (yet). */ spin_lock(&enic->devcmd_lock); err = enic_set_nic_cfg(enic, rss_default_cpu, rss_hash_type, rss_hash_bits, rss_base_cpu, rss_enable, tso_ipid_split_en, ig_vlan_strip_en); spin_unlock(&enic->devcmd_lock); return err; } static int enic_dev_hang_notify(struct enic *enic) { int err; spin_lock(&enic->devcmd_lock); err = vnic_dev_hang_notify(enic->vdev); spin_unlock(&enic->devcmd_lock); return err; } int enic_dev_set_ig_vlan_rewrite_mode(struct enic *enic) { int err; spin_lock(&enic->devcmd_lock); err = vnic_dev_set_ig_vlan_rewrite_mode(enic->vdev, IG_VLAN_REWRITE_MODE_PRIORITY_TAG_DEFAULT_VLAN); spin_unlock(&enic->devcmd_lock); 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(); enic_dev_hang_notify(enic); enic_stop(enic->netdev); enic_dev_hang_reset(enic); enic_reset_multicast_list(enic); enic_init_vnic_resources(enic); enic_set_niccfg(enic); enic_dev_set_ig_vlan_rewrite_mode(enic); enic_open(enic->netdev); rtnl_unlock(); } static int enic_set_intr_mode(struct enic *enic) { unsigned int n = 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_dynamic_ops = { .ndo_open = enic_open, .ndo_stop = enic_stop, .ndo_start_xmit = enic_hard_start_xmit, .ndo_get_stats = enic_get_stats, .ndo_validate_addr = eth_validate_addr, .ndo_set_multicast_list = enic_set_multicast_list, .ndo_set_mac_address = enic_set_mac_address_dynamic, .ndo_change_mtu = enic_change_mtu, .ndo_vlan_rx_register = enic_vlan_rx_register, .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid, .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid, .ndo_tx_timeout = enic_tx_timeout, .ndo_set_vf_port = enic_set_vf_port, .ndo_get_vf_port = enic_get_vf_port, #ifdef CONFIG_NET_POLL_CONTROLLER .ndo_poll_controller = enic_poll_controller, #endif }; static const struct net_device_ops enic_netdev_ops = { .ndo_open = enic_open, .ndo_stop = enic_stop, .ndo_start_xmit = enic_hard_start_xmit, .ndo_get_stats = enic_get_stats, .ndo_validate_addr = eth_validate_addr, .ndo_set_mac_address = enic_set_mac_address, .ndo_set_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); } static int enic_dev_stats_clear(struct enic *enic) { int err; spin_lock(&enic->devcmd_lock); err = vnic_dev_stats_clear(enic->vdev); spin_unlock(&enic->devcmd_lock); return err; } int enic_dev_init(struct enic *enic) { struct device *dev = enic_get_dev(enic); struct net_device *netdev = enic->netdev; int err; /* Get vNIC configuration */ err = enic_get_vnic_config(enic); if (err) { dev_err(dev, "Get vNIC configuration failed, aborting\n"); return err; } /* Get available resource counts */ enic_get_res_counts(enic); /* Set interrupt mode based on resource counts and system * capabilities */ err = enic_set_intr_mode(enic); if (err) { dev_err(dev, "Failed to set intr mode based on resource " "counts and system capabilities, aborting\n"); return err; } /* Allocate and configure vNIC resources */ err = enic_alloc_vnic_resources(enic); if (err) { dev_err(dev, "Failed to alloc vNIC resources, aborting\n"); goto err_out_free_vnic_resources; } enic_init_vnic_resources(enic); /* Clear LIF stats */ enic_dev_stats_clear(enic); err = enic_set_rq_alloc_buf(enic); if (err) { dev_err(dev, "Failed to set RQ buffer allocator, aborting\n"); goto err_out_free_vnic_resources; } err = enic_set_niccfg(enic); if (err) { dev_err(dev, "Failed to config nic, aborting\n"); goto err_out_free_vnic_resources; } err = enic_dev_set_ig_vlan_rewrite_mode(enic); if (err) { netdev_err(netdev, "Failed to set ingress vlan rewrite mode, 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 device *dev = &pdev->dev; struct net_device *netdev; struct enic *enic; int using_dac = 0; unsigned int i; int err; /* Allocate net device structure and initialize. Private * instance data is initialized to zero. */ netdev = alloc_etherdev(sizeof(struct enic)); if (!netdev) { pr_err("Etherdev alloc failed, aborting\n"); return -ENOMEM; } pci_set_drvdata(pdev, netdev); SET_NETDEV_DEV(netdev, &pdev->dev); enic = netdev_priv(netdev); enic->netdev = netdev; enic->pdev = pdev; /* Setup PCI resources */ err = pci_enable_device_mem(pdev); if (err) { dev_err(dev, "Cannot enable PCI device, aborting\n"); goto err_out_free_netdev; } err = pci_request_regions(pdev, DRV_NAME); if (err) { dev_err(dev, "Cannot request PCI regions, aborting\n"); goto err_out_disable_device; } pci_set_master(pdev); /* Query PCI controller on system for DMA addressing * limitation for the device. Try 40-bit first, and * fail to 32-bit. */ err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40)); if (err) { err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); if (err) { dev_err(dev, "No usable DMA configuration, aborting\n"); goto err_out_release_regions; } err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); if (err) { dev_err(dev, "Unable to obtain %u-bit DMA " "for consistent allocations, aborting\n", 32); goto err_out_release_regions; } } else { err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40)); if (err) { dev_err(dev, "Unable to obtain %u-bit DMA " "for consistent allocations, aborting\n", 40); goto err_out_release_regions; } using_dac = 1; } /* Map vNIC resources from BAR0-5 */ for (i = 0; i < ARRAY_SIZE(enic->bar); i++) { if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM)) continue; enic->bar[i].len = pci_resource_len(pdev, i); enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len); if (!enic->bar[i].vaddr) { dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i); err = -ENODEV; goto err_out_iounmap; } enic->bar[i].bus_addr = pci_resource_start(pdev, i); } /* Register vNIC device */ enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar, ARRAY_SIZE(enic->bar)); if (!enic->vdev) { dev_err(dev, "vNIC registration failed, aborting\n"); err = -ENODEV; goto err_out_iounmap; } /* Issue device open to get device in known state */ err = enic_dev_open(enic); if (err) { dev_err(dev, "vNIC dev open failed, aborting\n"); goto err_out_vnic_unregister; } /* Issue device init to initialize the vnic-to-switch link. * We'll start with carrier off and wait for link UP * notification later to turn on carrier. We don't need * to wait here for the vnic-to-switch link initialization * to complete; link UP notification is the indication that * the process is complete. */ netif_carrier_off(netdev); /* Do not call dev_init for a dynamic vnic. * For a dynamic vnic, init_prov_info will be * called later by an upper layer. */ if (!enic_is_dynamic(enic)) { err = vnic_dev_init(enic->vdev, 0); if (err) { dev_err(dev, "vNIC dev init failed, aborting\n"); goto err_out_dev_close; } } /* Setup devcmd lock */ spin_lock_init(&enic->devcmd_lock); err = enic_dev_init(enic); if (err) { dev_err(dev, "Device initialization failed, aborting\n"); goto err_out_dev_close; } /* Setup notification timer, HW reset task, and wq locks */ init_timer(&enic->notify_timer); enic->notify_timer.function = enic_notify_timer; enic->notify_timer.data = (unsigned long)enic; INIT_WORK(&enic->reset, enic_reset); for (i = 0; i < enic->wq_count; i++) spin_lock_init(&enic->wq_lock[i]); /* Register net device */ enic->port_mtu = enic->config.mtu; (void)enic_change_mtu(netdev, enic->port_mtu); err = enic_set_mac_addr(netdev, enic->mac_addr); if (err) { dev_err(dev, "Invalid MAC address, aborting\n"); goto err_out_dev_deinit; } enic->tx_coalesce_usecs = enic->config.intr_timer_usec; enic->rx_coalesce_usecs = enic->tx_coalesce_usecs; if (enic_is_dynamic(enic)) netdev->netdev_ops = &enic_netdev_dynamic_ops; else netdev->netdev_ops = &enic_netdev_ops; netdev->watchdog_timeo = 2 * HZ; netdev->ethtool_ops = &enic_ethtool_ops; netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX; if (ENIC_SETTING(enic, LOOP)) { netdev->features &= ~NETIF_F_HW_VLAN_TX; enic->loop_enable = 1; enic->loop_tag = enic->config.loop_tag; dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag); } if (ENIC_SETTING(enic, TXCSUM)) netdev->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_GRO; if (using_dac) netdev->features |= NETIF_F_HIGHDMA; enic->csum_rx_enabled = ENIC_SETTING(enic, RXCSUM); err = register_netdev(netdev); if (err) { dev_err(dev, "Cannot register net device, aborting\n"); goto err_out_dev_deinit; } return 0; err_out_dev_deinit: enic_dev_deinit(enic); err_out_dev_close: vnic_dev_close(enic->vdev); err_out_vnic_unregister: vnic_dev_unregister(enic->vdev); err_out_iounmap: enic_iounmap(enic); err_out_release_regions: pci_release_regions(pdev); err_out_disable_device: pci_disable_device(pdev); err_out_free_netdev: pci_set_drvdata(pdev, NULL); free_netdev(netdev); return err; } static void __devexit enic_remove(struct pci_dev *pdev) { struct net_device *netdev = pci_get_drvdata(pdev); if (netdev) { struct enic *enic = netdev_priv(netdev); 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) { pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION); return pci_register_driver(&enic_driver); } static void __exit enic_cleanup_module(void) { pci_unregister_driver(&enic_driver); } module_init(enic_init_module); module_exit(enic_cleanup_module);