intelvf.c File Reference

Intel 10/100/1000 virtual function network card driver. More...

#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <ipxe/io.h>
#include <ipxe/netdevice.h>
#include <ipxe/ethernet.h>
#include "intelvf.h"

Go to the source code of this file.

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
static void	intelvf_mbox_write (struct intel_nic *intel, const union intelvf_msg *msg)
	Write message to mailbox. More...
static void	intelvf_mbox_read (struct intel_nic *intel, union intelvf_msg *msg)
	Read message from mailbox. More...
int	intelvf_mbox_poll (struct intel_nic *intel)
	Poll mailbox. More...
int	intelvf_mbox_wait (struct intel_nic *intel)
	Wait for PF reset to complete. More...
int	intelvf_mbox_msg (struct intel_nic *intel, union intelvf_msg *msg)
	Send/receive mailbox message. More...
int	intelvf_mbox_reset (struct intel_nic *intel, uint8_t *hw_addr)
	Send reset message and get initial MAC address. More...
int	intelvf_mbox_set_mac (struct intel_nic *intel, const uint8_t *ll_addr)
	Send set MAC address message. More...
int	intelvf_mbox_set_mtu (struct intel_nic *intel, size_t mtu)
	Send set MTU message. More...

Detailed Description

Intel 10/100/1000 virtual function network card driver.

Definition in file intelvf.c.

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER_OR_UBDL

)

intelvf_mbox_write()

static void intelvf_mbox_write ( struct intel_nic *  intel, const union intelvf_msg *  msg  )

static

Write message to mailbox.

Parameters

intel	Intel device
msg	Message

Definition at line 53 of file intelvf.c.

                                                                {
        const struct intelvf_msg_raw *raw = &msg->raw;
        unsigned int i;

        /* Write message */
        DBGC2 ( intel, "INTEL %p sending message", intel );
        for ( i = 0 ; i < ( sizeof ( *msg ) / sizeof ( raw->dword[0] ) ) ; i++){
                DBGC2 ( intel, "%c%08x", ( i ? ':' : ' ' ), raw->dword[i] );
                writel ( raw->dword[i], ( intel->regs + intel->mbox.mem +
                                          ( i * sizeof ( raw->dword[0] ) ) ) );
        }
        DBGC2 ( intel, "\n" );
}

References DBGC2, intel_nic::mbox, intel_mailbox::mem, msg(), raw, intel_nic::regs, and writel().

Referenced by intelvf_mbox_msg().

intelvf_mbox_read()

static void intelvf_mbox_read ( struct intel_nic *  intel, union intelvf_msg *  msg  )

static

Read message from mailbox.

Parameters

intel	Intel device
msg	Message

Definition at line 74 of file intelvf.c.

                                                         {
        struct intelvf_msg_raw *raw = &msg->raw;
        unsigned int i;

        /* Read message */
        DBGC2 ( intel, "INTEL %p received message", intel );
        for ( i = 0 ; i < ( sizeof ( *msg ) / sizeof ( raw->dword[0] ) ) ; i++){
                raw->dword[i] = readl ( intel->regs + intel->mbox.mem +
                                        ( i * sizeof ( raw->dword[0] ) ) );
                DBGC2 ( intel, "%c%08x", ( i ? ':' : ' ' ), raw->dword[i] );
        }
        DBGC2 ( intel, "\n" );
}

References DBGC2, intel_nic::mbox, intel_mailbox::mem, msg(), raw, readl(), and intel_nic::regs.

Referenced by intelvf_mbox_msg(), and intelvf_mbox_poll().

intelvf_mbox_poll()

int intelvf_mbox_poll

(

struct intel_nic *

intel

)

Poll mailbox.

Parameters

intel

Intel device

Return values

rc	Return status code

Note that polling the mailbox may fail if the underlying PF is reset.

Definition at line 98 of file intelvf.c.

                                                  {
        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;
}

References ctrl, EPIPE, INTELVF_MBCTRL_ACK, INTELVF_MBCTRL_PFSTS, INTELVF_MBCTRL_RSTI, intelvf_mbox_read(), intel_nic::mbox, msg(), readl(), intel_nic::regs, and writel().

Referenced by intelvf_mbox_wait(), and intelxvf_poll().

intelvf_mbox_wait()

int intelvf_mbox_wait

(

struct intel_nic *

intel

)

Wait for PF reset to complete.

Parameters

intel

Intel device

Return values

rc	Return status code

Definition at line 125 of file intelvf.c.

                                                  {
        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;
}

References DBGC, ETIMEDOUT, INTELVF_MBOX_MAX_WAIT_MS, intelvf_mbox_poll(), mdelay(), and rc.

intelvf_mbox_msg()

int intelvf_mbox_msg	(	struct intel_nic *	intel,
		union intelvf_msg *	msg
	)

Send/receive mailbox message.

Parameters

intel	Intel device
msg	Message buffer

Return values

rc	Return status code

Definition at line 151 of file intelvf.c.

                                                                         {
        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;
}

References assert(), ctrl, DBGC, EPIPE, ETIMEDOUT, INTELVF_MBCTRL_ACK, INTELVF_MBCTRL_PFACK, INTELVF_MBCTRL_PFSTS, INTELVF_MBCTRL_REQ, INTELVF_MBCTRL_RSTI, INTELVF_MBCTRL_VFU, INTELVF_MBOX_MAX_WAIT_MS, intelvf_mbox_read(), intelvf_mbox_write(), INTELVF_MSG_RESPONSE, intel_nic::mbox, mdelay(), msg(), readl(), intel_nic::regs, and writel().

Referenced by intelvf_mbox_reset(), intelvf_mbox_set_mac(), intelvf_mbox_set_mtu(), intelxvf_mbox_queues(), and intelxvf_mbox_version().

intelvf_mbox_reset()

int intelvf_mbox_reset	(	struct intel_nic *	intel,
		uint8_t *	hw_addr
	)

Send reset message and get initial MAC address.

Parameters

intel	Intel device
hw_addr	Hardware address to fill in, or NULL

Return values

rc	Return status code

Definition at line 232 of file intelvf.c.

                                                                     {
        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;
}

References DBGC, DBGC_HDA, EPROTO, eth_ntoa(), eth_random_addr(), intelvf_mbox_msg(), INTELVF_MSG_ACK, INTELVF_MSG_TYPE_MASK, INTELVF_MSG_TYPE_RESET, memcpy(), memset(), msg(), rc, and strerror().

Referenced by intelxvf_open(), and intelxvf_probe().

intelvf_mbox_set_mac()

int intelvf_mbox_set_mac	(	struct intel_nic *	intel,
		const uint8_t *	ll_addr
	)

Send set MAC address message.

Parameters

intel	Intel device
ll_addr	Link-layer address

Return values

rc	Return status code

Definition at line 275 of file intelvf.c.

                                                                             {
        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;
}

References DBGC, DBGC_HDA, EPERM, EPROTO, intelvf_mbox_msg(), INTELVF_MSG_ACK, INTELVF_MSG_TYPE_MASK, INTELVF_MSG_TYPE_SET_MAC, memcpy(), memset(), msg(), rc, and strerror().

Referenced by intelxvf_open().

intelvf_mbox_set_mtu()

int intelvf_mbox_set_mtu	(	struct intel_nic *	intel,
		size_t	mtu
	)

Send set MTU message.

Parameters

intel	Intel device
mtu	Maximum packet size

Return values

rc	Return status code

Definition at line 313 of file intelvf.c.

                                                                 {
        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;
}

References DBGC, DBGC_HDA, EPERM, EPROTO, intelvf_mbox_msg(), INTELVF_MSG_ACK, INTELVF_MSG_TYPE_MASK, INTELVF_MSG_TYPE_SET_MTU, memset(), msg(), mtu, rc, and strerror().

Referenced by intelxvf_open().