diff options
| author | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2011-05-13 22:20:35 -0700 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2011-08-11 02:42:06 -0700 |
| commit | a6a5580c4d90788d67a77c689d3ab22aa5eecfc3 (patch) | |
| tree | 89080daf4b0b4939daadb807f19eca3e977d42cb /drivers/net/enic/enic_main.c | |
| parent | 9aa3283595451ca093500ff0977b106e1f465586 (diff) | |
enic: Move the Cisco driver
Move the Cisco driver into drivers/net/ethernet/cisco/ and make the
necessary Kconfig and Makefile changes.
CC: Christian Benvenuti <benve@cisco.com>
CC: Vasanthy Kolluri <vkolluri@cisco.com>
CC: Roopa Prabhu <roprabhu@cisco.com>
CC: David Wang <dwang2@cisco.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/enic/enic_main.c')
| -rw-r--r-- | drivers/net/enic/enic_main.c | 2513 |
1 files changed, 0 insertions, 2513 deletions
diff --git a/drivers/net/enic/enic_main.c b/drivers/net/enic/enic_main.c deleted file mode 100644 index 67a27cd304d..00000000000 --- a/drivers/net/enic/enic_main.c +++ /dev/null @@ -1,2513 +0,0 @@ -/* - * 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 <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/interrupt.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 <linux/rtnetlink.h> -#include <linux/prefetch.h> -#include <net/ip6_checksum.h> - -#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" -#include "enic_dev.h" -#include "enic_pp.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 <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_is_dynamic(struct enic *enic) -{ - return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN; -} - -static inline unsigned int enic_cq_rq(struct enic *enic, unsigned int rq) -{ - return rq; -} - -static inline unsigned int enic_cq_wq(struct enic *enic, unsigned int wq) -{ - return enic->rq_count + wq; -} - -static inline unsigned int enic_legacy_io_intr(void) -{ - return 0; -} - -static inline unsigned int enic_legacy_err_intr(void) -{ - return 1; -} - -static inline unsigned int enic_legacy_notify_intr(void) -{ - return 2; -} - -static inline unsigned int enic_msix_rq_intr(struct enic *enic, unsigned int rq) -{ - return enic->cq[enic_cq_rq(enic, rq)].interrupt_offset; -} - -static inline unsigned int enic_msix_wq_intr(struct enic *enic, unsigned int wq) -{ - return enic->cq[enic_cq_wq(enic, wq)].interrupt_offset; -} - -static inline unsigned int enic_msix_err_intr(struct enic *enic) -{ - return enic->rq_count + enic->wq_count; -} - -static inline unsigned int enic_msix_notify_intr(struct enic *enic) -{ - return enic->rq_count + enic->wq_count + 1; -} - -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)) { - ethtool_cmd_speed_set(ecmd, vnic_dev_port_speed(enic->vdev)); - ecmd->duplex = DUPLEX_FULL; - } else { - ethtool_cmd_speed_set(ecmd, -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; - - 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 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_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; - unsigned int i, intr; - - tx_coalesce_usecs = min_t(u32, ecmd->tx_coalesce_usecs, - vnic_dev_get_intr_coal_timer_max(enic->vdev)); - rx_coalesce_usecs = min_t(u32, ecmd->rx_coalesce_usecs, - vnic_dev_get_intr_coal_timer_max(enic->vdev)); - - switch (vnic_dev_get_intr_mode(enic->vdev)) { - case VNIC_DEV_INTR_MODE_INTX: - if (tx_coalesce_usecs != rx_coalesce_usecs) - return -EINVAL; - - intr = enic_legacy_io_intr(); - vnic_intr_coalescing_timer_set(&enic->intr[intr], - 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], - tx_coalesce_usecs); - break; - case VNIC_DEV_INTR_MODE_MSIX: - for (i = 0; i < enic->wq_count; i++) { - intr = enic_msix_wq_intr(enic, i); - vnic_intr_coalescing_timer_set(&enic->intr[intr], - tx_coalesce_usecs); - } - - for (i = 0; i < enic->rq_count; i++) { - intr = enic_msix_rq_intr(enic, i); - vnic_intr_coalescing_timer_set(&enic->intr[intr], - 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_coalesce = enic_get_coalesce, - .set_coalesce = enic_set_coalesce, -}; - -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 (enic_is_dynamic(enic)) { - mtu = max_t(int, ENIC_MIN_MTU, - min_t(int, ENIC_MAX_MTU, mtu)); - if (mtu != netdev->mtu) - schedule_work(&enic->change_mtu_work); - } else { - 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); - unsigned int io_intr = enic_legacy_io_intr(); - unsigned int err_intr = enic_legacy_err_intr(); - unsigned int notify_intr = enic_legacy_notify_intr(); - u32 pba; - - vnic_intr_mask(&enic->intr[io_intr]); - - pba = vnic_intr_legacy_pba(enic->legacy_pba); - if (!pba) { - vnic_intr_unmask(&enic->intr[io_intr]); - return IRQ_NONE; /* not our interrupt */ - } - - if (ENIC_TEST_INTR(pba, notify_intr)) { - vnic_intr_return_all_credits(&enic->intr[notify_intr]); - enic_notify_check(enic); - } - - if (ENIC_TEST_INTR(pba, err_intr)) { - vnic_intr_return_all_credits(&enic->intr[err_intr]); - enic_log_q_error(enic); - /* schedule recovery from WQ/RQ error */ - schedule_work(&enic->reset); - return IRQ_HANDLED; - } - - if (ENIC_TEST_INTR(pba, io_intr)) { - if (napi_schedule_prep(&enic->napi[0])) - __napi_schedule(&enic->napi[0]); - } else { - vnic_intr_unmask(&enic->intr[io_intr]); - } - - return IRQ_HANDLED; -} - -static irqreturn_t enic_isr_msi(int irq, void *data) -{ - struct enic *enic = data; - - /* With MSI, there is no sharing of interrupts, so this is - * our interrupt and there is no need to ack it. The device - * is not providing per-vector masking, so the OS will not - * write to PCI config space to mask/unmask the interrupt. - * We're using mask_on_assertion for MSI, so the device - * automatically masks the interrupt when the interrupt is - * generated. Later, when exiting polling, the interrupt - * will be unmasked (see enic_poll). - * - * Also, the device uses the same PCIe Traffic Class (TC) - * for Memory Write data and MSI, so there are no ordering - * issues; the MSI will always arrive at the Root Complex - * _after_ corresponding Memory Writes (i.e. descriptor - * writes). - */ - - napi_schedule(&enic->napi[0]); - - return IRQ_HANDLED; -} - -static irqreturn_t enic_isr_msix_rq(int irq, void *data) -{ - struct napi_struct *napi = data; - - /* schedule NAPI polling for RQ cleanup */ - napi_schedule(napi); - - return IRQ_HANDLED; -} - -static irqreturn_t enic_isr_msix_wq(int irq, void *data) -{ - struct enic *enic = data; - unsigned int cq = enic_cq_wq(enic, 0); - unsigned int intr = enic_msix_wq_intr(enic, 0); - unsigned int wq_work_to_do = -1; /* no limit */ - unsigned int wq_work_done; - - wq_work_done = vnic_cq_service(&enic->cq[cq], - wq_work_to_do, enic_wq_service, NULL); - - vnic_intr_return_credits(&enic->intr[intr], - wq_work_done, - 1 /* unmask intr */, - 1 /* reset intr timer */); - - return IRQ_HANDLED; -} - -static irqreturn_t enic_isr_msix_err(int irq, void *data) -{ - struct enic *enic = data; - unsigned int intr = enic_msix_err_intr(enic); - - vnic_intr_return_all_credits(&enic->intr[intr]); - - enic_log_q_error(enic); - - /* schedule recovery from WQ/RQ error */ - schedule_work(&enic->reset); - - return IRQ_HANDLED; -} - -static irqreturn_t enic_isr_msix_notify(int irq, void *data) -{ - struct enic *enic = data; - unsigned int intr = enic_msix_notify_intr(enic); - - vnic_intr_return_all_credits(&enic->intr[intr]); - enic_notify_check(enic); - - return IRQ_HANDLED; -} - -static inline void enic_queue_wq_skb_cont(struct enic *enic, - struct vnic_wq *wq, struct sk_buff *skb, - unsigned int len_left, int loopback) -{ - skb_frag_t *frag; - - /* Queue additional data fragments */ - for (frag = skb_shinfo(skb)->frags; len_left; frag++) { - len_left -= frag->size; - enic_queue_wq_desc_cont(wq, skb, - pci_map_page(enic->pdev, frag->page, - frag->page_offset, frag->size, - PCI_DMA_TODEVICE), - frag->size, - (len_left == 0), /* EOP? */ - loopback); - } -} - -static inline void enic_queue_wq_skb_vlan(struct enic *enic, - struct vnic_wq *wq, struct sk_buff *skb, - int vlan_tag_insert, unsigned int vlan_tag, int loopback) -{ - unsigned int head_len = skb_headlen(skb); - unsigned int len_left = skb->len - head_len; - int eop = (len_left == 0); - - /* Queue the main skb fragment. The fragments are no larger - * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less - * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor - * per fragment is queued. - */ - enic_queue_wq_desc(wq, skb, - pci_map_single(enic->pdev, skb->data, - head_len, PCI_DMA_TODEVICE), - head_len, - vlan_tag_insert, vlan_tag, - eop, loopback); - - if (!eop) - enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback); -} - -static inline void enic_queue_wq_skb_csum_l4(struct enic *enic, - struct vnic_wq *wq, struct sk_buff *skb, - int vlan_tag_insert, unsigned int vlan_tag, int loopback) -{ - unsigned int head_len = skb_headlen(skb); - unsigned int len_left = skb->len - head_len; - unsigned int hdr_len = skb_checksum_start_offset(skb); - unsigned int csum_offset = hdr_len + skb->csum_offset; - int eop = (len_left == 0); - - /* Queue the main skb fragment. The fragments are no larger - * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less - * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor - * per fragment is queued. - */ - enic_queue_wq_desc_csum_l4(wq, skb, - pci_map_single(enic->pdev, skb->data, - head_len, PCI_DMA_TODEVICE), - head_len, - csum_offset, - hdr_len, - vlan_tag_insert, vlan_tag, - eop, loopback); - - if (!eop) - enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback); -} - -static inline void enic_queue_wq_skb_tso(struct enic *enic, - struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss, - int vlan_tag_insert, unsigned int vlan_tag, int loopback) -{ - unsigned int frag_len_left = skb_headlen(skb); - unsigned int len_left = skb->len - frag_len_left; - unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); - int eop = (len_left == 0); - unsigned int len; - dma_addr_t dma_addr; - unsigned int offset = 0; - skb_frag_t *frag; - - /* Preload TCP csum field with IP pseudo hdr calculated - * with IP length set to zero. HW will later add in length - * to each TCP segment resulting from the TSO. - */ - - if (skb->protocol == cpu_to_be16(ETH_P_IP)) { - ip_hdr(skb)->check = 0; - tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr, - ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); - } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) { - tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, - &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); - } - - /* Queue WQ_ENET_MAX_DESC_LEN length descriptors - * for the main skb fragment - */ - while (frag_len_left) { - len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN); - dma_addr = pci_map_single(enic->pdev, skb->data + offset, - len, PCI_DMA_TODEVICE); - enic_queue_wq_desc_tso(wq, skb, - dma_addr, - len, - mss, hdr_len, - vlan_tag_insert, vlan_tag, - eop && (len == frag_len_left), loopback); - frag_len_left -= len; - offset += len; - } - - if (eop) - return; - - /* Queue WQ_ENET_MAX_DESC_LEN length descriptors - * for additional data fragments - */ - for (frag = skb_shinfo(skb)->frags; len_left; frag++) { - len_left -= frag->size; - frag_len_left = frag->size; - offset = frag->page_offset; - - while (frag_len_left) { - len = min(frag_len_left, - (unsigned int)WQ_ENET_MAX_DESC_LEN); - dma_addr = pci_map_page(enic->pdev, frag->page, - offset, len, - PCI_DMA_TODEVICE); - enic_queue_wq_desc_cont(wq, skb, - dma_addr, - len, - (len_left == 0) && - (len == frag_len_left), /* EOP? */ - loopback); - frag_len_left -= len; - offset += len; - } - } -} - -static inline void enic_queue_wq_skb(struct enic *enic, - struct vnic_wq *wq, struct sk_buff *skb) -{ - unsigned int mss = skb_shinfo(skb)->gso_size; - unsigned int vlan_tag = 0; - int vlan_tag_insert = 0; - int loopback = 0; - - if (vlan_tx_tag_present(skb)) { - /* VLAN tag from trunking driver */ - vlan_tag_insert = 1; - vlan_tag = vlan_tx_tag_get(skb); - } else if (enic->loop_enable) { - vlan_tag = enic->loop_tag; - loopback = 1; - } - - if (mss) - enic_queue_wq_skb_tso(enic, wq, skb, mss, - vlan_tag_insert, vlan_tag, loopback); - else if (skb->ip_summed == CHECKSUM_PARTIAL) - enic_queue_wq_skb_csum_l4(enic, wq, skb, - vlan_tag_insert, vlan_tag, loopback); - else - enic_queue_wq_skb_vlan(enic, wq, skb, - vlan_tag_insert, vlan_tag, loopback); -} - -/* netif_tx_lock held, process context with BHs disabled, or BH */ -static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb, - struct net_device *netdev) -{ - struct enic *enic = netdev_priv(netdev); - struct vnic_wq *wq = &enic->wq[0]; - unsigned long flags; - - if (skb->len <= 0) { - dev_kfree_skb(skb); - return NETDEV_TX_OK; - } - - /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs, - * which is very likely. In the off chance it's going to take - * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb. - */ - - if (skb_shinfo(skb)->gso_size == 0 && - skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC && - skb_linearize(skb)) { - dev_kfree_skb(skb); - return NETDEV_TX_OK; - } - - spin_lock_irqsave(&enic->wq_lock[0], flags); - - if (vnic_wq_desc_avail(wq) < - skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) { - netif_stop_queue(netdev); - /* This is a hard error, log it */ - netdev_err(netdev, "BUG! Tx ring full when queue awake!\n"); - spin_unlock_irqrestore(&enic->wq_lock[0], flags); - return NETDEV_TX_BUSY; - } - - enic_queue_wq_skb(enic, wq, skb); - - if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS) - netif_stop_queue(netdev); - - spin_unlock_irqrestore(&enic->wq_lock[0], flags); - - return NETDEV_TX_OK; -} - -/* dev_base_lock rwlock held, nominally process context */ -static struct rtnl_link_stats64 *enic_get_stats(struct net_device *netdev, - struct rtnl_link_stats64 *net_stats) -{ - struct enic *enic = netdev_priv(netdev); - struct vnic_stats *stats; - - enic_dev_stats_dump(enic, &stats); - - net_stats->tx_packets = stats->tx.tx_frames_ok; - net_stats->tx_bytes = stats->tx.tx_bytes_ok; - net_stats->tx_errors = stats->tx.tx_errors; - net_stats->tx_dropped = stats->tx.tx_drops; - - net_stats->rx_packets = stats->rx.rx_frames_ok; - net_stats->rx_bytes = stats->rx.rx_bytes_ok; - net_stats->rx_errors = stats->rx.rx_errors; - net_stats->multicast = stats->rx.rx_multicast_frames_ok; - net_stats->rx_over_errors = enic->rq_truncated_pkts; - net_stats->rx_crc_errors = enic->rq_bad_fcs; - net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop; - - return net_stats; -} - -void enic_reset_addr_lists(struct enic *enic) -{ - enic->mc_count = 0; - enic->uc_count = 0; - enic->flags = 0; -} - -static int enic_set_mac_addr(struct net_device *netdev, char *addr) -{ - struct enic *enic = netdev_priv(netdev); - - if (enic_is_dynamic(enic)) { - if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr)) - return -EADDRNOTAVAIL; - } else { - if (!is_valid_ether_addr(addr)) - return -EADDRNOTAVAIL; - } - - memcpy(netdev->dev_addr, addr, netdev->addr_len); - - return 0; -} - -static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p) -{ - struct enic *enic = netdev_priv(netdev); - struct sockaddr *saddr = p; - char *addr = saddr->sa_data; - int err; - - if (netif_running(enic->netdev)) { - err = enic_dev_del_station_addr(enic); - if (err) - return err; - } - - err = enic_set_mac_addr(netdev, addr); - if (err) - return err; - - if (netif_running(enic->netdev)) { - err = enic_dev_add_station_addr(enic); - if (err) - return err; - } - - return err; -} - -static int enic_set_mac_address(struct net_device *netdev, void *p) -{ - struct sockaddr *saddr = p; - char *addr = saddr->sa_data; - struct enic *enic = netdev_priv(netdev); - int err; - - err = enic_dev_del_station_addr(enic); - if (err) - return err; - - err = enic_set_mac_addr(netdev, addr); - if (err) - return err; - - return enic_dev_add_station_addr(enic); -} - -static void enic_update_multicast_addr_list(struct enic *enic) -{ - struct net_device *netdev = enic->netdev; - struct netdev_hw_addr *ha; - unsigned int mc_count = netdev_mc_count(netdev); - u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN]; - unsigned int i, j; - - if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS) { - netdev_warn(netdev, "Registering only %d out of %d " - "multicast addresses\n", - ENIC_MULTICAST_PERFECT_FILTERS, mc_count); - mc_count = ENIC_MULTICAST_PERFECT_FILTERS; - } - - /* Is there an easier way? Trying to minimize to - * calls to add/del multicast addrs. We keep the - * addrs from the last call in enic->mc_addr and - * look for changes to add/del. - */ - - i = 0; - netdev_for_each_mc_addr(ha, netdev) { - if (i == mc_count) - break; - memcpy(mc_addr[i++], ha->addr, ETH_ALEN); - } - - for (i = 0; i < enic->mc_count; i++) { - for (j = 0; j < mc_count; j++) - if (compare_ether_addr(enic->mc_addr[i], - mc_addr[j]) == 0) - break; - if (j == mc_count) - enic_dev_del_addr(enic, enic->mc_addr[i]); - } - - for (i = 0; i < mc_count; i++) { - for (j = 0; j < enic->mc_count; j++) - if (compare_ether_addr(mc_addr[i], - enic->mc_addr[j]) == 0) - break; - if (j == enic->mc_count) - enic_dev_add_addr(enic, mc_addr[i]); - } - - /* Save the list to compare against next time - */ - - for (i = 0; i < mc_count; i++) - memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN); - - enic->mc_count = mc_count; -} - -static void enic_update_unicast_addr_list(struct enic *enic) -{ - struct net_device *netdev = enic->netdev; - struct netdev_hw_addr *ha; - unsigned int uc_count = netdev_uc_count(netdev); - u8 uc_addr[ENIC_UNICAST_PERFECT_FILTERS][ETH_ALEN]; - unsigned int i, j; - - if (uc_count > ENIC_UNICAST_PERFECT_FILTERS) { - netdev_warn(netdev, "Registering only %d out of %d " - "unicast addresses\n", - ENIC_UNICAST_PERFECT_FILTERS, uc_count); - uc_count = ENIC_UNICAST_PERFECT_FILTERS; - } - - /* Is there an easier way? Trying to minimize to - * calls to add/del unicast addrs. We keep the - * addrs from the last call in enic->uc_addr and - * look for changes to add/del. - */ - - i = 0; - netdev_for_each_uc_addr(ha, netdev) { - if (i == uc_count) - break; - memcpy(uc_addr[i++], ha->addr, ETH_ALEN); - } - - for (i = 0; i < enic->uc_count; i++) { - for (j = 0; j < uc_count; j++) - if (compare_ether_addr(enic->uc_addr[i], - uc_addr[j]) == 0) - break; - if (j == uc_count) - enic_dev_del_addr(enic, enic->uc_addr[i]); - } - - for (i = 0; i < uc_count; i++) { - for (j = 0; j < enic->uc_count; j++) - if (compare_ether_addr(uc_addr[i], - enic->uc_addr[j]) == 0) - break; - if (j == enic->uc_count) - enic_dev_add_addr(enic, uc_addr[i]); - } - - /* Save the list to compare against next time - */ - - for (i = 0; i < uc_count; i++) - memcpy(enic->uc_addr[i], uc_addr[i], ETH_ALEN); - - enic->uc_count = uc_count; -} - -/* netif_tx_lock held, BHs disabled */ -static void enic_set_rx_mode(struct net_device *netdev) -{ - struct enic *enic = netdev_priv(netdev); - int directed = 1; - int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0; - int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0; - int promisc = (netdev->flags & IFF_PROMISC) || - netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS; - int allmulti = (netdev->flags & IFF_ALLMULTI) || - netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS; - unsigned int flags = netdev->flags | - (allmulti ? IFF_ALLMULTI : 0) | - (promisc ? IFF_PROMISC : 0); - - if (enic->flags != flags) { - enic->flags = flags; - enic_dev_packet_filter(enic, directed, - multicast, broadcast, promisc, allmulti); - } - - if (!promisc) { - enic_update_unicast_addr_list(enic); - if (!allmulti) - enic_update_multicast_addr_list(enic); - } -} - -/* netif_tx_lock held, BHs disabled */ -static void enic_tx_timeout(struct net_device *netdev) -{ - struct enic *enic = netdev_priv(netdev); - schedule_work(&enic->reset); -} - -static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac) -{ - struct enic *enic = netdev_priv(netdev); - - if (vf != PORT_SELF_VF) - return -EOPNOTSUPP; - - /* Ignore the vf argument for now. We can assume the request - * is coming on a vf. - */ - if (is_valid_ether_addr(mac)) { - memcpy(enic->pp.vf_mac, mac, ETH_ALEN); - return 0; - } else - return -EINVAL; -} - -static int enic_set_vf_port(struct net_device *netdev, int vf, - struct nlattr *port[]) -{ - struct enic *enic = netdev_priv(netdev); - struct enic_port_profile prev_pp; - int err = 0, restore_pp = 1; - - /* don't support VFs, yet */ - if (vf != PORT_SELF_VF) - return -EOPNOTSUPP; - - if (!port[IFLA_PORT_REQUEST]) - return -EOPNOTSUPP; - - memcpy(&prev_pp, &enic->pp, sizeof(enic->pp)); - memset(&enic->pp, 0, sizeof(enic->pp)); - - enic->pp.set |= ENIC_SET_REQUEST; - enic->pp.request = nla_get_u8(port[IFLA_PORT_REQUEST]); - - if (port[IFLA_PORT_PROFILE]) { - enic->pp.set |= ENIC_SET_NAME; - memcpy(enic->pp.name, nla_data(port[IFLA_PORT_PROFILE]), - PORT_PROFILE_MAX); - } - - if (port[IFLA_PORT_INSTANCE_UUID]) { - enic->pp.set |= ENIC_SET_INSTANCE; - memcpy(enic->pp.instance_uuid, - nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX); - } - - if (port[IFLA_PORT_HOST_UUID]) { - enic->pp.set |= ENIC_SET_HOST; - memcpy(enic->pp.host_uuid, - nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX); - } - - /* Special case handling: mac came from IFLA_VF_MAC */ - if (!is_zero_ether_addr(prev_pp.vf_mac)) - memcpy(enic->pp.mac_addr, prev_pp.vf_mac, ETH_ALEN); - - if (is_zero_ether_addr(netdev->dev_addr)) - random_ether_addr(netdev->dev_addr); - - err = enic_process_set_pp_request(enic, &prev_pp, &restore_pp); - if (err) { - if (restore_pp) { - /* Things are still the way they were: Implicit - * DISASSOCIATE failed - */ - memcpy(&enic->pp, &prev_pp, sizeof(enic->pp)); - } else { - memset(&enic->pp, 0, sizeof(enic->pp)); - memset(netdev->dev_addr, 0, ETH_ALEN); - } - } else { - /* Set flag to indicate that the port assoc/disassoc - * request has been sent out to fw - */ - enic->pp.set |= ENIC_PORT_REQUEST_APPLIED; - - /* If DISASSOCIATE, clean up all assigned/saved macaddresses */ - if (enic->pp.request == PORT_REQUEST_DISASSOCIATE) { - memset(enic->pp.mac_addr, 0, ETH_ALEN); - memset(netdev->dev_addr, 0, ETH_ALEN); - } - } - - memset(enic->pp.vf_mac, 0, ETH_ALEN); - - return err; -} - -static int enic_get_vf_port(struct net_device *netdev, int vf, - struct sk_buff *skb) -{ - struct enic *enic = netdev_priv(netdev); - u16 response = PORT_PROFILE_RESPONSE_SUCCESS; - int err; - - if (!(enic->pp.set & ENIC_PORT_REQUEST_APPLIED)) - return -ENODATA; - - err = enic_process_get_pp_request(enic, enic->pp.request, &response); - if (err) - return err; - - NLA_PUT_U16(skb, IFLA_PORT_REQUEST, enic->pp.request); - NLA_PUT_U16(skb, IFLA_PORT_RESPONSE, response); - if (enic->pp.set & ENIC_SET_NAME) - NLA_PUT(skb, IFLA_PORT_PROFILE, |