diff options
Diffstat (limited to 'qemu/roms/ipxe/src/drivers/net/intelvf.c')
| -rw-r--r-- | qemu/roms/ipxe/src/drivers/net/intelvf.c | 340 |
1 files changed, 340 insertions, 0 deletions
diff --git a/qemu/roms/ipxe/src/drivers/net/intelvf.c b/qemu/roms/ipxe/src/drivers/net/intelvf.c new file mode 100644 index 000000000..ac6fea745 --- /dev/null +++ b/qemu/roms/ipxe/src/drivers/net/intelvf.c @@ -0,0 +1,340 @@ +/* + * 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/netdevice.h> +#include <ipxe/ethernet.h> +#include "intelvf.h" + +/** @file + * + * Intel 10/100/1000 virtual function network card driver + * + */ + +/****************************************************************************** + * + * Mailbox messages + * + ****************************************************************************** + */ + +/** + * Write message to mailbox + * + * @v intel Intel device + * @v msg Message + */ +static void intelvf_mbox_write ( struct intel_nic *intel, + const union intelvf_msg *msg ) { + unsigned int i; + + /* Write message */ + DBGC2 ( intel, "INTEL %p sending message", intel ); + for ( i = 0 ; i < ( sizeof ( *msg ) / sizeof ( msg->dword[0] ) ) ; i++){ + DBGC2 ( intel, "%c%08x", ( i ? ':' : ' ' ), msg->dword[i] ); + writel ( msg->dword[i], ( intel->regs + intel->mbox.mem + + ( i * sizeof ( msg->dword[0] ) ) ) ); + } + DBGC2 ( intel, "\n" ); +} + +/** + * Read message from mailbox + * + * @v intel Intel device + * @v msg Message + */ +static void intelvf_mbox_read ( struct intel_nic *intel, + union intelvf_msg *msg ) { + unsigned int i; + + /* Read message */ + DBGC2 ( intel, "INTEL %p received message", intel ); + for ( i = 0 ; i < ( sizeof ( *msg ) / sizeof ( msg->dword[0] ) ) ; i++){ + msg->dword[i] = readl ( intel->regs + intel->mbox.mem + + ( i * sizeof ( msg->dword[0] ) ) ); + DBGC2 ( intel, "%c%08x", ( i ? ':' : ' ' ), msg->dword[i] ); + } + DBGC2 ( intel, "\n" ); +} + +/** + * Poll mailbox + * + * @v intel Intel device + * @ret rc Return status code + * + * Note that polling the mailbox may fail if the underlying PF is + * reset. + */ +int intelvf_mbox_poll ( struct intel_nic *intel ) { + struct intel_mailbox *mbox = &intel->mbox; + union intelvf_msg msg; + uint32_t ctrl; + + /* Get mailbox status */ + ctrl = readl ( intel->regs + mbox->ctrl ); + + /* Fail if a reset is in progress */ + if ( ctrl & INTELVF_MBCTRL_RSTI ) + return -EPIPE; + + /* Acknowledge (and ignore) any received messages */ + if ( ctrl & INTELVF_MBCTRL_PFSTS ) { + intelvf_mbox_read ( intel, &msg ); + writel ( INTELVF_MBCTRL_ACK, intel->regs + mbox->ctrl ); + } + + return 0; +} + +/** + * Wait for PF reset to complete + * + * @v intel Intel device + * @ret rc Return status code + */ +int intelvf_mbox_wait ( struct intel_nic *intel ) { + unsigned int i; + int rc; + + /* Wait until a poll completes successfully */ + for ( i = 0 ; i < INTELVF_MBOX_MAX_WAIT_MS ; i++ ) { + + /* Check for successful poll */ + if ( ( rc = intelvf_mbox_poll ( intel ) ) == 0 ) + return 0; + + /* Delay */ + mdelay ( 1 ); + } + + DBGC ( intel, "INTEL %p timed out waiting for reset\n", intel ); + return -ETIMEDOUT; +} + +/** + * Send/receive mailbox message + * + * @v intel Intel device + * @v msg Message buffer + * @ret rc Return status code + */ +int intelvf_mbox_msg ( struct intel_nic *intel, union intelvf_msg *msg ) { + struct intel_mailbox *mbox = &intel->mbox; + uint32_t ctrl; + uint32_t seen = 0; + unsigned int i; + + /* Sanity check */ + assert ( ! ( msg->hdr & INTELVF_MSG_RESPONSE ) ); + + /* Handle mailbox */ + for ( i = 0 ; i < INTELVF_MBOX_MAX_WAIT_MS ; i++ ) { + + /* Attempt to claim mailbox, if we have not yet sent + * our message. + */ + if ( ! ( seen & INTELVF_MBCTRL_VFU ) ) + writel ( INTELVF_MBCTRL_VFU, intel->regs + mbox->ctrl ); + + /* Get mailbox status and record observed flags */ + ctrl = readl ( intel->regs + mbox->ctrl ); + seen |= ctrl; + + /* If a reset is in progress, clear VFU and abort */ + if ( ctrl & INTELVF_MBCTRL_RSTI ) { + writel ( 0, intel->regs + mbox->ctrl ); + return -EPIPE; + } + + /* Write message to mailbox, if applicable. This + * potentially overwrites a message sent by the PF (if + * the PF has simultaneously released PFU (thus + * allowing our VFU) and asserted PFSTS), but that + * doesn't really matter since there are no + * unsolicited PF->VF messages that require the actual + * message content to be observed. + */ + if ( ctrl & INTELVF_MBCTRL_VFU ) + intelvf_mbox_write ( intel, msg ); + + /* Read message from mailbox, if applicable. */ + if ( ( seen & INTELVF_MBCTRL_VFU ) && + ( seen & INTELVF_MBCTRL_PFACK ) && + ( ctrl & INTELVF_MBCTRL_PFSTS ) ) + intelvf_mbox_read ( intel, msg ); + + /* Acknowledge received message (if applicable), + * release VFU lock, and send message (if applicable). + */ + ctrl = ( ( ( ctrl & INTELVF_MBCTRL_PFSTS ) ? + INTELVF_MBCTRL_ACK : 0 ) | + ( ( ctrl & INTELVF_MBCTRL_VFU ) ? + INTELVF_MBCTRL_REQ : 0 ) ); + writel ( ctrl, intel->regs + mbox->ctrl ); + + /* Exit successfully if we have received a response */ + if ( msg->hdr & INTELVF_MSG_RESPONSE ) { + + /* Sanity check */ + assert ( seen & INTELVF_MBCTRL_VFU ); + assert ( seen & INTELVF_MBCTRL_PFACK ); + assert ( seen & INTELVF_MBCTRL_PFSTS ); + + return 0; + } + + /* Delay */ + mdelay ( 1 ); + } + + DBGC ( intel, "INTEL %p timed out waiting for mailbox (seen %08x)\n", + intel, seen ); + return -ETIMEDOUT; +} + +/** + * Send reset message and get initial MAC address + * + * @v intel Intel device + * @v hw_addr Hardware address to fill in, or NULL + * @ret rc Return status code + */ +int intelvf_mbox_reset ( struct intel_nic *intel, uint8_t *hw_addr ) { + union intelvf_msg msg; + int rc; + + /* Send reset message */ + memset ( &msg, 0, sizeof ( msg ) ); + msg.hdr = INTELVF_MSG_TYPE_RESET; + if ( ( rc = intelvf_mbox_msg ( intel, &msg ) ) != 0 ) { + DBGC ( intel, "INTEL %p reset failed: %s\n", + intel, strerror ( rc ) ); + return rc; + } + + /* Check response */ + if ( ( msg.hdr & INTELVF_MSG_TYPE_MASK ) != INTELVF_MSG_TYPE_RESET ) { + DBGC ( intel, "INTEL %p reset unexpected response:\n", intel ); + DBGC_HDA ( intel, 0, &msg, sizeof ( msg ) ); + return -EPROTO; + } + + /* Fill in MAC address, if applicable */ + if ( hw_addr ) { + if ( msg.hdr & INTELVF_MSG_ACK ) { + memcpy ( hw_addr, msg.mac.mac, sizeof ( msg.mac.mac ) ); + DBGC ( intel, "INTEL %p reset assigned MAC address " + "%s\n", intel, eth_ntoa ( hw_addr ) ); + } else { + eth_random_addr ( hw_addr ); + DBGC ( intel, "INTEL %p reset generated MAC address " + "%s\n", intel, eth_ntoa ( hw_addr ) ); + } + } + + return 0; +} + +/** + * Send set MAC address message + * + * @v intel Intel device + * @v ll_addr Link-layer address + * @ret rc Return status code + */ +int intelvf_mbox_set_mac ( struct intel_nic *intel, const uint8_t *ll_addr ) { + union intelvf_msg msg; + int rc; + + /* Send set MAC address message */ + memset ( &msg, 0, sizeof ( msg ) ); + msg.hdr = INTELVF_MSG_TYPE_SET_MAC; + memcpy ( msg.mac.mac, ll_addr, sizeof ( msg.mac.mac ) ); + if ( ( rc = intelvf_mbox_msg ( intel, &msg ) ) != 0 ) { + DBGC ( intel, "INTEL %p set MAC address failed: %s\n", + intel, strerror ( rc ) ); + return rc; + } + + /* Check response */ + if ( ( msg.hdr & INTELVF_MSG_TYPE_MASK ) != INTELVF_MSG_TYPE_SET_MAC ) { + DBGC ( intel, "INTEL %p set MAC address unexpected response:\n", + intel ); + DBGC_HDA ( intel, 0, &msg, sizeof ( msg ) ); + return -EPROTO; + } + + /* Check that we were allowed to set the MAC address */ + if ( ! ( msg.hdr & INTELVF_MSG_ACK ) ) { + DBGC ( intel, "INTEL %p set MAC address refused\n", intel ); + return -EPERM; + } + + return 0; +} + +/** + * Send set MTU message + * + * @v intel Intel device + * @v mtu Maximum packet size + * @ret rc Return status code + */ +int intelvf_mbox_set_mtu ( struct intel_nic *intel, size_t mtu ) { + union intelvf_msg msg; + int rc; + + /* Send set MTU message */ + memset ( &msg, 0, sizeof ( msg ) ); + msg.hdr = INTELVF_MSG_TYPE_SET_MTU; + msg.mtu.mtu = mtu; + if ( ( rc = intelvf_mbox_msg ( intel, &msg ) ) != 0 ) { + DBGC ( intel, "INTEL %p set MTU failed: %s\n", + intel, strerror ( rc ) ); + return rc; + } + + /* Check response */ + if ( ( msg.hdr & INTELVF_MSG_TYPE_MASK ) != INTELVF_MSG_TYPE_SET_MTU ) { + DBGC ( intel, "INTEL %p set MTU unexpected response:\n", + intel ); + DBGC_HDA ( intel, 0, &msg, sizeof ( msg ) ); + return -EPROTO; + } + + /* Check that we were allowed to set the MTU */ + if ( ! ( msg.hdr & INTELVF_MSG_ACK ) ) { + DBGC ( intel, "INTEL %p set MTU refused\n", intel ); + return -EPERM; + } + + return 0; +} |