diff options
Diffstat (limited to 'qemu/roms/ipxe/src/drivers/net/intelxvf.c')
| -rw-r--r-- | qemu/roms/ipxe/src/drivers/net/intelxvf.c | 466 |
1 files changed, 466 insertions, 0 deletions
diff --git a/qemu/roms/ipxe/src/drivers/net/intelxvf.c b/qemu/roms/ipxe/src/drivers/net/intelxvf.c new file mode 100644 index 000000000..05e34c127 --- /dev/null +++ b/qemu/roms/ipxe/src/drivers/net/intelxvf.c @@ -0,0 +1,466 @@ +/* + * Copyright (C) 2015 Michael Brown <mbrown@fensystems.co.uk>. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of the + * License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + * + * You can also choose to distribute this program under the terms of + * the Unmodified Binary Distribution Licence (as given in the file + * COPYING.UBDL), provided that you have satisfied its requirements. + */ + +FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); + +#include <string.h> +#include <unistd.h> +#include <errno.h> +#include <ipxe/io.h> +#include <ipxe/pci.h> +#include <ipxe/netdevice.h> +#include <ipxe/ethernet.h> +#include "intelxvf.h" + +/** @file + * + * Intel 10 Gigabit Ethernet virtual function network card driver + * + */ + +/****************************************************************************** + * + * Diagnostics + * + ****************************************************************************** + */ + +/** + * Dump statistics + * + * @v intel Intel device + */ +static __attribute__ (( unused )) void +intelxvf_stats ( struct intel_nic *intel ) { + + DBGC ( intel, "INTEL %p TX %d (%#x%08x) RX %d (%#x%08x) multi %d\n", + intel, readl ( intel->regs + INTELXVF_GPTC ), + readl ( intel->regs + INTELXVF_GOTCH ), + readl ( intel->regs + INTELXVF_GOTCL ), + readl ( intel->regs + INTELXVF_GPRC ), + readl ( intel->regs + INTELXVF_GORCH ), + readl ( intel->regs + INTELXVF_GORCL ), + readl ( intel->regs + INTELXVF_MPRC ) ); +} + +/****************************************************************************** + * + * Device reset + * + ****************************************************************************** + */ + +/** + * Reset hardware + * + * @v intel Intel device + */ +static void intelxvf_reset ( struct intel_nic *intel ) { + + /* Perform a function-level reset */ + writel ( INTELXVF_CTRL_RST, intel->regs + INTELXVF_CTRL ); +} + +/****************************************************************************** + * + * Link state + * + ****************************************************************************** + */ + +/** + * Check link state + * + * @v netdev Network device + */ +static void intelxvf_check_link ( struct net_device *netdev ) { + struct intel_nic *intel = netdev->priv; + uint32_t links; + + /* Read link status */ + links = readl ( intel->regs + INTELXVF_LINKS ); + DBGC ( intel, "INTEL %p link status is %08x\n", intel, links ); + + /* Update network device */ + if ( links & INTELXVF_LINKS_UP ) { + netdev_link_up ( netdev ); + } else { + netdev_link_down ( netdev ); + } +} + +/****************************************************************************** + * + * Mailbox messages + * + ****************************************************************************** + */ + +/** + * Send negotiate API version message + * + * @v intel Intel device + * @v version Requested version + * @ret rc Return status code + */ +static int intelxvf_mbox_version ( struct intel_nic *intel, + unsigned int version ) { + union intelvf_msg msg; + int rc; + + /* Send set MTU message */ + memset ( &msg, 0, sizeof ( msg ) ); + msg.hdr = INTELXVF_MSG_TYPE_VERSION; + msg.version.version = version; + if ( ( rc = intelvf_mbox_msg ( intel, &msg ) ) != 0 ) { + DBGC ( intel, "INTEL %p negotiate API version failed: %s\n", + intel, strerror ( rc ) ); + return rc; + } + + /* Check response */ + if ( ( msg.hdr & INTELVF_MSG_TYPE_MASK ) != INTELXVF_MSG_TYPE_VERSION ){ + DBGC ( intel, "INTEL %p negotiate API version unexpected " + "response:\n", intel ); + DBGC_HDA ( intel, 0, &msg, sizeof ( msg ) ); + return -EPROTO; + } + + /* Check that this version is supported */ + if ( ! ( msg.hdr & INTELVF_MSG_ACK ) ) { + DBGC ( intel, "INTEL %p negotiate API version failed\n", + intel ); + return -EPERM; + } + + return 0; +} + +/****************************************************************************** + * + * Network device interface + * + ****************************************************************************** + */ + +/** + * Open network device + * + * @v netdev Network device + * @ret rc Return status code + */ +static int intelxvf_open ( struct net_device *netdev ) { + struct intel_nic *intel = netdev->priv; + uint32_t srrctl; + uint32_t dca_rxctrl; + int rc; + + /* Reset the function */ + intelxvf_reset ( intel ); + + /* Notify PF that reset is complete */ + if ( ( rc = intelvf_mbox_reset ( intel, NULL ) ) != 0 ) { + DBGC ( intel, "INTEL %p could not reset: %s\n", + intel, strerror ( rc ) ); + goto err_mbox_reset; + } + + /* Negotiate API version 1.1. If we do not negotiate at least + * this version, then the RX datapath will remain disabled if + * the PF has jumbo frames enabled. + * + * Ignore failures, since the host may not actually support + * v1.1. + */ + intelxvf_mbox_version ( intel, INTELXVF_MSG_VERSION_1_1 ); + + /* Set MAC address */ + if ( ( rc = intelvf_mbox_set_mac ( intel, netdev->ll_addr ) ) != 0 ) { + DBGC ( intel, "INTEL %p could not set MAC address: %s\n", + intel, strerror ( rc ) ); + goto err_mbox_set_mac; + } + + /* Set MTU */ + if ( ( rc = intelvf_mbox_set_mtu ( intel, netdev->max_pkt_len ) ) != 0){ + DBGC ( intel, "INTEL %p could not set MTU %zd: %s\n", + intel, netdev->max_pkt_len, strerror ( rc ) ); + goto err_mbox_set_mtu; + } + + /* Create transmit descriptor ring */ + if ( ( rc = intel_create_ring ( intel, &intel->tx ) ) != 0 ) + goto err_create_tx; + + /* Create receive descriptor ring */ + if ( ( rc = intel_create_ring ( intel, &intel->rx ) ) != 0 ) + goto err_create_rx; + + /* Allocate interrupt vectors */ + writel ( ( INTELXVF_IVAR_RX0_DEFAULT | INTELXVF_IVAR_RX0_VALID | + INTELXVF_IVAR_TX0_DEFAULT | INTELXVF_IVAR_TX0_VALID ), + intel->regs + INTELXVF_IVAR ); + writel ( ( INTELXVF_IVARM_MBOX_DEFAULT | INTELXVF_IVARM_MBOX_VALID ), + intel->regs + INTELXVF_IVARM ); + + /* Configure receive buffer sizes and set receive descriptor type */ + srrctl = readl ( intel->regs + INTELXVF_SRRCTL ); + srrctl &= ~( INTELXVF_SRRCTL_BSIZE_MASK | + INTELXVF_SRRCTL_DESCTYPE_MASK ); + srrctl |= ( INTELXVF_SRRCTL_BSIZE_DEFAULT | + INTELXVF_SRRCTL_DESCTYPE_DEFAULT ); + writel ( srrctl, intel->regs + INTELXVF_SRRCTL ); + + /* Clear "must-be-zero" bit for direct cache access (DCA). We + * leave DCA disabled anyway, but if we do not clear this bit + * then the received packets contain garbage data. + */ + dca_rxctrl = readl ( intel->regs + INTELXVF_DCA_RXCTRL ); + dca_rxctrl &= ~INTELXVF_DCA_RXCTRL_MUST_BE_ZERO; + writel ( dca_rxctrl, intel->regs + INTELXVF_DCA_RXCTRL ); + + /* Fill receive ring */ + intel_refill_rx ( intel ); + + /* Update link state */ + intelxvf_check_link ( netdev ); + + return 0; + + intel_destroy_ring ( intel, &intel->rx ); + err_create_rx: + intel_destroy_ring ( intel, &intel->tx ); + err_create_tx: + err_mbox_set_mtu: + err_mbox_set_mac: + err_mbox_reset: + intelxvf_reset ( intel ); + return rc; +} + +/** + * Close network device + * + * @v netdev Network device + */ +static void intelxvf_close ( struct net_device *netdev ) { + struct intel_nic *intel = netdev->priv; + + /* Destroy receive descriptor ring */ + intel_destroy_ring ( intel, &intel->rx ); + + /* Discard any unused receive buffers */ + intel_empty_rx ( intel ); + + /* Destroy transmit descriptor ring */ + intel_destroy_ring ( intel, &intel->tx ); + + /* Reset the function */ + intelxvf_reset ( intel ); +} + +/** + * Poll for completed and received packets + * + * @v netdev Network device + */ +static void intelxvf_poll ( struct net_device *netdev ) { + struct intel_nic *intel = netdev->priv; + uint32_t eicr; + int rc; + + /* Check for and acknowledge interrupts */ + eicr = readl ( intel->regs + INTELXVF_EICR ); + if ( ! eicr ) + return; + + /* Poll for TX completions, if applicable */ + if ( eicr & INTELXVF_EIRQ_TX0 ) + intel_poll_tx ( netdev ); + + /* Poll for RX completions, if applicable */ + if ( eicr & INTELXVF_EIRQ_RX0 ) + intel_poll_rx ( netdev ); + + /* Poll for mailbox messages, if applicable */ + if ( eicr & INTELXVF_EIRQ_MBOX ) { + + /* Poll mailbox */ + if ( ( rc = intelvf_mbox_poll ( intel ) ) != 0 ) { + DBGC ( intel, "INTEL %p mailbox poll failed!\n", + intel ); + netdev_rx_err ( netdev, NULL, rc ); + } + + /* Update link state */ + intelxvf_check_link ( netdev ); + } + + /* Refill RX ring */ + intel_refill_rx ( intel ); +} + +/** + * Enable or disable interrupts + * + * @v netdev Network device + * @v enable Interrupts should be enabled + */ +static void intelxvf_irq ( struct net_device *netdev, int enable ) { + struct intel_nic *intel = netdev->priv; + uint32_t mask; + + mask = ( INTELXVF_EIRQ_MBOX | INTELXVF_EIRQ_TX0 | INTELXVF_EIRQ_RX0 ); + if ( enable ) { + writel ( mask, intel->regs + INTELXVF_EIMS ); + } else { + writel ( mask, intel->regs + INTELXVF_EIMC ); + } +} + +/** Network device operations */ +static struct net_device_operations intelxvf_operations = { + .open = intelxvf_open, + .close = intelxvf_close, + .transmit = intel_transmit, + .poll = intelxvf_poll, + .irq = intelxvf_irq, +}; + +/****************************************************************************** + * + * PCI interface + * + ****************************************************************************** + */ + +/** + * Probe PCI device + * + * @v pci PCI device + * @ret rc Return status code + */ +static int intelxvf_probe ( struct pci_device *pci ) { + struct net_device *netdev; + struct intel_nic *intel; + int rc; + + /* Allocate and initialise net device */ + netdev = alloc_etherdev ( sizeof ( *intel ) ); + if ( ! netdev ) { + rc = -ENOMEM; + goto err_alloc; + } + netdev_init ( netdev, &intelxvf_operations ); + intel = netdev->priv; + pci_set_drvdata ( pci, netdev ); + netdev->dev = &pci->dev; + memset ( intel, 0, sizeof ( *intel ) ); + intel_init_mbox ( &intel->mbox, INTELXVF_MBCTRL, INTELXVF_MBMEM ); + intel_init_ring ( &intel->tx, INTEL_NUM_TX_DESC, INTELXVF_TD, + intel_describe_tx_adv ); + intel_init_ring ( &intel->rx, INTEL_NUM_RX_DESC, INTELXVF_RD, + intel_describe_rx ); + + /* Fix up PCI device */ + adjust_pci_device ( pci ); + + /* Map registers */ + intel->regs = ioremap ( pci->membase, INTELVF_BAR_SIZE ); + if ( ! intel->regs ) { + rc = -ENODEV; + goto err_ioremap; + } + + /* Reset the function */ + intelxvf_reset ( intel ); + + /* Send reset message and fetch MAC address */ + if ( ( rc = intelvf_mbox_reset ( intel, netdev->hw_addr ) ) != 0 ) { + DBGC ( intel, "INTEL %p could not reset and fetch MAC: %s\n", + intel, strerror ( rc ) ); + goto err_mbox_reset; + } + + /* Reset the function (since we will not respond to Control + * ("ping") mailbox messages until the network device is opened. + */ + intelxvf_reset ( intel ); + + /* Register network device */ + if ( ( rc = register_netdev ( netdev ) ) != 0 ) + goto err_register_netdev; + + /* Set initial link state */ + intelxvf_check_link ( netdev ); + + return 0; + + unregister_netdev ( netdev ); + err_register_netdev: + err_mbox_reset: + intelxvf_reset ( intel ); + iounmap ( intel->regs ); + err_ioremap: + netdev_nullify ( netdev ); + netdev_put ( netdev ); + err_alloc: + return rc; +} + +/** + * Remove PCI device + * + * @v pci PCI device + */ +static void intelxvf_remove ( struct pci_device *pci ) { + struct net_device *netdev = pci_get_drvdata ( pci ); + struct intel_nic *intel = netdev->priv; + + /* Unregister network device */ + unregister_netdev ( netdev ); + + /* Reset the NIC */ + intelxvf_reset ( intel ); + + /* Free network device */ + iounmap ( intel->regs ); + netdev_nullify ( netdev ); + netdev_put ( netdev ); +} + +/** PCI device IDs */ +static struct pci_device_id intelxvf_nics[] = { + PCI_ROM ( 0x8086, 0x10ed, "82599-vf", "82599 VF", 0 ), + PCI_ROM ( 0x8086, 0x1515, "x540-vf", "X540 VF", 0 ), + PCI_ROM ( 0x8086, 0x1565, "x550-vf", "X550 VF", 0 ), + PCI_ROM ( 0x8086, 0x15a8, "x552-vf", "X552 VF", 0 ), +}; + +/** PCI driver */ +struct pci_driver intelxvf_driver __pci_driver = { + .ids = intelxvf_nics, + .id_count = ( sizeof ( intelxvf_nics ) / sizeof ( intelxvf_nics[0] ) ), + .probe = intelxvf_probe, + .remove = intelxvf_remove, +}; |