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[intel] Add intelxvf driver for Intel 10 GigE virtual function NICs
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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/* | ||
* 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. | ||
*/ | ||
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FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); | ||
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#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" | ||
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/** @file | ||
* | ||
* Intel 10 Gigabit Ethernet virtual function network card driver | ||
* | ||
*/ | ||
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/****************************************************************************** | ||
* | ||
* Device reset | ||
* | ||
****************************************************************************** | ||
*/ | ||
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/** | ||
* Reset hardware | ||
* | ||
* @v intel Intel device | ||
*/ | ||
static void intelxvf_reset ( struct intel_nic *intel ) { | ||
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/* Perform a function-level reset */ | ||
writel ( INTELXVF_CTRL_RST, intel->regs + INTELXVF_CTRL ); | ||
} | ||
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/****************************************************************************** | ||
* | ||
* Link state | ||
* | ||
****************************************************************************** | ||
*/ | ||
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/** | ||
* 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; | ||
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/* Read link status */ | ||
links = readl ( intel->regs + INTELXVF_LINKS ); | ||
DBGC ( intel, "INTEL %p link status is %08x\n", intel, links ); | ||
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/* Update network device */ | ||
if ( links & INTELXVF_LINKS_UP ) { | ||
netdev_link_up ( netdev ); | ||
} else { | ||
netdev_link_down ( netdev ); | ||
} | ||
} | ||
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/****************************************************************************** | ||
* | ||
* Network device interface | ||
* | ||
****************************************************************************** | ||
*/ | ||
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/** | ||
* 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; | ||
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/* Reset the function */ | ||
intelxvf_reset ( intel ); | ||
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/* 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; | ||
} | ||
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/* 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; | ||
} | ||
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/* Create transmit descriptor ring */ | ||
if ( ( rc = intel_create_ring ( intel, &intel->tx ) ) != 0 ) | ||
goto err_create_tx; | ||
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/* Create receive descriptor ring */ | ||
if ( ( rc = intel_create_ring ( intel, &intel->rx ) ) != 0 ) | ||
goto err_create_rx; | ||
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/* 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 ); | ||
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/* 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 ); | ||
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/* 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 ); | ||
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/* Fill receive ring */ | ||
intel_refill_rx ( intel ); | ||
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/* Update link state */ | ||
intelxvf_check_link ( netdev ); | ||
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return 0; | ||
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intel_destroy_ring ( intel, &intel->rx ); | ||
err_create_rx: | ||
intel_destroy_ring ( intel, &intel->tx ); | ||
err_create_tx: | ||
err_mbox_set_mac: | ||
err_mbox_reset: | ||
intelxvf_reset ( intel ); | ||
return rc; | ||
} | ||
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/** | ||
* Close network device | ||
* | ||
* @v netdev Network device | ||
*/ | ||
static void intelxvf_close ( struct net_device *netdev ) { | ||
struct intel_nic *intel = netdev->priv; | ||
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/* Destroy receive descriptor ring */ | ||
intel_destroy_ring ( intel, &intel->rx ); | ||
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/* Discard any unused receive buffers */ | ||
intel_empty_rx ( intel ); | ||
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/* Destroy transmit descriptor ring */ | ||
intel_destroy_ring ( intel, &intel->tx ); | ||
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/* Reset the function */ | ||
intelxvf_reset ( intel ); | ||
} | ||
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/** | ||
* 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; | ||
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/* Check for and acknowledge interrupts */ | ||
eicr = readl ( intel->regs + INTELXVF_EICR ); | ||
if ( ! eicr ) | ||
return; | ||
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/* Poll for TX completions, if applicable */ | ||
if ( eicr & INTELXVF_EIRQ_TX0 ) | ||
intel_poll_tx ( netdev ); | ||
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/* Poll for RX completions, if applicable */ | ||
if ( eicr & INTELXVF_EIRQ_RX0 ) | ||
intel_poll_rx ( netdev ); | ||
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/* Poll for mailbox messages, if applicable */ | ||
if ( eicr & INTELXVF_EIRQ_MBOX ) { | ||
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/* Poll mailbox */ | ||
if ( ( rc = intelvf_mbox_poll ( intel ) ) != 0 ) { | ||
DBGC ( intel, "INTEL %p mailbox poll failed!\n", | ||
intel ); | ||
netdev_rx_err ( netdev, NULL, rc ); | ||
} | ||
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/* Update link state */ | ||
intelxvf_check_link ( netdev ); | ||
} | ||
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/* Refill RX ring */ | ||
intel_refill_rx ( intel ); | ||
} | ||
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/** | ||
* 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; | ||
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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 ); | ||
} | ||
} | ||
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/** 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, | ||
}; | ||
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/****************************************************************************** | ||
* | ||
* PCI interface | ||
* | ||
****************************************************************************** | ||
*/ | ||
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/** | ||
* 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; | ||
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/* 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 ); | ||
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/* Fix up PCI device */ | ||
adjust_pci_device ( pci ); | ||
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/* Map registers */ | ||
intel->regs = ioremap ( pci->membase, INTELVF_BAR_SIZE ); | ||
if ( ! intel->regs ) { | ||
rc = -ENODEV; | ||
goto err_ioremap; | ||
} | ||
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/* Reset the function */ | ||
intelxvf_reset ( intel ); | ||
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/* 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; | ||
} | ||
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/* Reset the function (since we will not respond to Control | ||
* ("ping") mailbox messages until the network device is opened. | ||
*/ | ||
intelxvf_reset ( intel ); | ||
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/* Register network device */ | ||
if ( ( rc = register_netdev ( netdev ) ) != 0 ) | ||
goto err_register_netdev; | ||
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/* Set initial link state */ | ||
intelxvf_check_link ( netdev ); | ||
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return 0; | ||
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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; | ||
} | ||
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/** | ||
* 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; | ||
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/* Unregister network device */ | ||
unregister_netdev ( netdev ); | ||
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/* Reset the NIC */ | ||
intelxvf_reset ( intel ); | ||
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/* Free network device */ | ||
iounmap ( intel->regs ); | ||
netdev_nullify ( netdev ); | ||
netdev_put ( netdev ); | ||
} | ||
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/** 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 ), | ||
}; | ||
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/** 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, | ||
}; |
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