efi_snp.c File Reference

#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
#include <byteswap.h>
#include <ipxe/netdevice.h>
#include <ipxe/vlan.h>
#include <ipxe/iobuf.h>
#include <ipxe/in.h>
#include <ipxe/version.h>
#include <ipxe/console.h>
#include <ipxe/efi/efi.h>
#include <ipxe/efi/efi_driver.h>
#include <ipxe/efi/efi_strings.h>
#include <ipxe/efi/efi_path.h>
#include <ipxe/efi/efi_utils.h>
#include <ipxe/efi/efi_watchdog.h>
#include <ipxe/efi/efi_null.h>
#include <ipxe/efi/efi_snp.h>
#include <usr/autoboot.h>
#include <config/general.h>

Go to the source code of this file.

Data Structures
union	PXE_CPB_ANY
	Union type for command parameter blocks. More...
union	PXE_DB_ANY
	Union type for data blocks. More...

Functions
	FILE_LICENCE (GPL2_OR_LATER)
	FILE_SECBOOT (PERMITTED)
static	LIST_HEAD (efi_snp_devices)
	List of SNP devices. More...
static void	efi_snp_set_state (struct efi_snp_device *snpdev)
	Set EFI SNP mode state. More...
static void	efi_snp_set_mode (struct efi_snp_device *snpdev)
	Set EFI SNP mode based on iPXE net device parameters. More...
static void	efi_snp_flush (struct efi_snp_device *snpdev)
	Flush transmit ring and receive queue. More...
static void	efi_snp_poll (struct efi_snp_device *snpdev)
	Poll net device and count received packets. More...
static EFI_STATUS EFIAPI	efi_snp_start (EFI_SIMPLE_NETWORK_PROTOCOL *snp)
	Change SNP state from "stopped" to "started". More...
static EFI_STATUS EFIAPI	efi_snp_stop (EFI_SIMPLE_NETWORK_PROTOCOL *snp)
	Change SNP state from "started" to "stopped". More...
static EFI_STATUS EFIAPI	efi_snp_initialize (EFI_SIMPLE_NETWORK_PROTOCOL *snp, UINTN extra_rx_bufsize, UINTN extra_tx_bufsize)
	Open the network device. More...
static EFI_STATUS EFIAPI	efi_snp_reset (EFI_SIMPLE_NETWORK_PROTOCOL *snp, BOOLEAN ext_verify)
	Reset the network device. More...
static EFI_STATUS EFIAPI	efi_snp_shutdown (EFI_SIMPLE_NETWORK_PROTOCOL *snp)
	Shut down the network device. More...
static EFI_STATUS EFIAPI	efi_snp_receive_filters (EFI_SIMPLE_NETWORK_PROTOCOL *snp, UINT32 enable, UINT32 disable, BOOLEAN mcast_reset, UINTN mcast_count, EFI_MAC_ADDRESS *mcast)
	Manage receive filters. More...
static EFI_STATUS EFIAPI	efi_snp_station_address (EFI_SIMPLE_NETWORK_PROTOCOL *snp, BOOLEAN reset, EFI_MAC_ADDRESS *new)
	Set station address. More...
static EFI_STATUS EFIAPI	efi_snp_statistics (EFI_SIMPLE_NETWORK_PROTOCOL *snp, BOOLEAN reset, UINTN *stats_len, EFI_NETWORK_STATISTICS *stats)
	Get (or reset) statistics. More...
static EFI_STATUS EFIAPI	efi_snp_mcast_ip_to_mac (EFI_SIMPLE_NETWORK_PROTOCOL *snp, BOOLEAN ipv6, EFI_IP_ADDRESS *ip, EFI_MAC_ADDRESS *mac)
	Convert multicast IP address to MAC address. More...
static EFI_STATUS EFIAPI	efi_snp_nvdata (EFI_SIMPLE_NETWORK_PROTOCOL *snp, BOOLEAN read, UINTN offset, UINTN len, VOID *data)
	Read or write non-volatile storage. More...
static EFI_STATUS EFIAPI	efi_snp_get_status (EFI_SIMPLE_NETWORK_PROTOCOL *snp, UINT32 *interrupts, VOID **txbuf)
	Read interrupt status and TX recycled buffer status. More...
static EFI_STATUS EFIAPI	efi_snp_transmit (EFI_SIMPLE_NETWORK_PROTOCOL *snp, UINTN ll_header_len, UINTN len, VOID *data, EFI_MAC_ADDRESS *ll_src, EFI_MAC_ADDRESS *ll_dest, UINT16 *net_proto)
	Start packet transmission. More...
static EFI_STATUS EFIAPI	efi_snp_receive (EFI_SIMPLE_NETWORK_PROTOCOL *snp, UINTN *ll_header_len, UINTN *len, VOID *data, EFI_MAC_ADDRESS *ll_src, EFI_MAC_ADDRESS *ll_dest, UINT16 *net_proto)
	Receive packet. More...
static VOID EFIAPI	efi_snp_wait_for_packet (EFI_EVENT event __unused, VOID *context)
	Poll event. More...
static uint8_t	efi_undi_checksum (void *data, size_t len)
	Calculate UNDI byte checksum. More...
static unsigned int	efi_undi_ifnum (struct efi_snp_device *snpdev)
	Get UNDI SNP device interface number. More...
static struct efi_snp_device *	efi_undi_snpdev (unsigned int ifnum)
	Identify UNDI SNP device. More...
static PXE_STATCODE	efi_undi_statcode (EFI_STATUS efirc)
	Convert EFI status code to UNDI status code. More...
static EFI_STATUS	efi_undi_get_state (struct efi_snp_device *snpdev, PXE_CDB *cdb)
	Get state. More...
static EFI_STATUS	efi_undi_start (struct efi_snp_device *snpdev)
	Start. More...
static EFI_STATUS	efi_undi_stop (struct efi_snp_device *snpdev)
	Stop. More...
static EFI_STATUS	efi_undi_get_init_info (struct efi_snp_device *snpdev, PXE_CDB *cdb, PXE_DB_GET_INIT_INFO *db)
	Get initialisation information. More...
static EFI_STATUS	efi_undi_initialize (struct efi_snp_device *snpdev, PXE_CDB *cdb)
	Initialise. More...
static EFI_STATUS	efi_undi_reset (struct efi_snp_device *snpdev)
	Reset. More...
static EFI_STATUS	efi_undi_shutdown (struct efi_snp_device *snpdev)
	Shutdown. More...
static EFI_STATUS	efi_undi_receive_filters (struct efi_snp_device *snpdev, PXE_CDB *cdb)
	Get/set receive filters. More...
static EFI_STATUS	efi_undi_station_address (struct efi_snp_device *snpdev, PXE_CDB *cdb, PXE_CPB_STATION_ADDRESS *cpb, PXE_DB_STATION_ADDRESS *db)
	Get/set station address. More...
static EFI_STATUS	efi_undi_get_status (struct efi_snp_device *snpdev, PXE_CDB *cdb, PXE_DB_GET_STATUS *db)
	Get interrupt status. More...
static EFI_STATUS	efi_undi_fill_header (struct efi_snp_device *snpdev, PXE_CDB *cdb, PXE_CPB_ANY *cpb)
	Fill header. More...
static EFI_STATUS	efi_undi_transmit (struct efi_snp_device *snpdev, PXE_CPB_TRANSMIT *cpb)
	Transmit. More...
static EFI_STATUS	efi_undi_receive (struct efi_snp_device *snpdev, PXE_CPB_RECEIVE *cpb, PXE_DB_RECEIVE *db)
	Receive. More...
static EFIAPI VOID	efi_undi_issue (UINT64 cdb_phys)
	UNDI entry point. More...
static EFI_STATUS EFIAPI	efi_vlan_set (EFI_VLAN_CONFIG_PROTOCOL *vcfg, UINT16 tag, UINT8 priority)
	Create or modify VLAN device. More...
static EFI_STATUS EFIAPI	efi_vlan_find (EFI_VLAN_CONFIG_PROTOCOL *vcfg, UINT16 *filter, UINT16 *count, EFI_VLAN_FIND_DATA **entries)
	Find VLAN device(s) More...
static EFI_STATUS EFIAPI	efi_vlan_remove (EFI_VLAN_CONFIG_PROTOCOL *vcfg, UINT16 tag)
	Remove VLAN device. More...
static EFI_STATUS EFIAPI	efi_snp_get_driver_name (EFI_COMPONENT_NAME2_PROTOCOL *name2, CHAR8 *language __unused, CHAR16 **driver_name)
	Look up driver name. More...
static EFI_STATUS EFIAPI	efi_snp_get_controller_name (EFI_COMPONENT_NAME2_PROTOCOL *name2, EFI_HANDLE device __unused, EFI_HANDLE child __unused, CHAR8 *language __unused, CHAR16 **controller_name)
	Look up controller name. More...
static EFI_STATUS EFIAPI	efi_snp_load_file (EFI_LOAD_FILE_PROTOCOL *load_file, EFI_DEVICE_PATH_PROTOCOL *path __unused, BOOLEAN booting, UINTN *len __unused, VOID *data __unused)
	Load file. More...
static struct efi_snp_device *	efi_snp_demux (struct net_device *netdev)
	Locate SNP device corresponding to network device. More...
static int	efi_snp_probe (struct net_device *netdev, void *priv __unused)
	Create SNP device. More...
static void	efi_snp_notify (struct net_device *netdev, void *priv __unused)
	Handle SNP device or link state change. More...
static void	efi_snp_remove (struct net_device *netdev, void *priv __unused)
	Destroy SNP device. More...
struct efi_snp_device *	find_snpdev (EFI_HANDLE handle)
	Find SNP device by EFI device handle. More...
struct efi_snp_device *	last_opened_snpdev (void)
	Get most recently opened SNP device. More...
void	efi_snp_add_claim (int delta)
	Add to SNP claimed/released count. More...

Variables
static int	efi_snp_claimed
	Network devices are currently claimed for use by iPXE. More...
static struct efi_saved_tpl	efi_snp_saved_tpl
	TPL prior to network devices being claimed. More...
static EFI_SIMPLE_NETWORK_PROTOCOL	efi_snp_device_snp
	SNP interface. More...
static PXE_SW_UNDI	efi_snp_undi
	UNDI interface. More...
static EFI_NETWORK_INTERFACE_IDENTIFIER_PROTOCOL	efi_snp_device_nii
	Network Identification Interface (NII) More...
static EFI_VLAN_CONFIG_PROTOCOL	efi_vlan
	VLAN configuration protocol. More...
static EFI_LOAD_FILE_PROTOCOL	efi_snp_load_file_protocol
	Load file protocol. More...
struct net_driver efi_snp_driver	__net_driver
	SNP driver. More...

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER

)

FILE_SECBOOT()

FILE_SECBOOT

(

PERMITTED

)

LIST_HEAD()

static LIST_HEAD ( efi_snp_devices  )

static

List of SNP devices.

efi_snp_set_state()

static void efi_snp_set_state ( struct efi_snp_device *  snpdev )

static

Set EFI SNP mode state.

Parameters

snp	SNP interface

Definition at line 92 of file efi_snp.c.

                                                                {
        struct net_device *netdev = snpdev->netdev;
        EFI_SIMPLE_NETWORK_MODE *mode = &snpdev->mode;

        /* Calculate state */
        if ( ! snpdev->started ) {
                /* Start() method not called; report as Stopped */
                mode->State = EfiSimpleNetworkStopped;
        } else if ( ! netdev_is_open ( netdev ) ) {
                /* Network device not opened; report as Started */
                mode->State = EfiSimpleNetworkStarted;
        } else if ( efi_snp_claimed ) {
                /* Network device opened but claimed for use by iPXE; report
                 * as Started to inhibit receive polling.
                 */
                mode->State = EfiSimpleNetworkStarted;
        } else {
                /* Network device opened and available for use via SNP; report
                 * as Initialized.
                 */
                mode->State = EfiSimpleNetworkInitialized;
        }
}

References efi_snp_claimed, EfiSimpleNetworkInitialized, EfiSimpleNetworkStarted, EfiSimpleNetworkStopped, mode, efi_snp_device::mode, efi_snp_device::netdev, netdev, netdev_is_open(), and efi_snp_device::started.

Referenced by efi_snp_add_claim(), efi_snp_initialize(), efi_snp_notify(), efi_snp_reset(), efi_snp_shutdown(), efi_snp_start(), and efi_snp_stop().

efi_snp_set_mode()

static void efi_snp_set_mode ( struct efi_snp_device *  snpdev )

static

Set EFI SNP mode based on iPXE net device parameters.

Parameters

snp	SNP interface

Definition at line 121 of file efi_snp.c.

                                                               {
        struct net_device *netdev = snpdev->netdev;
        EFI_SIMPLE_NETWORK_MODE *mode = &snpdev->mode;
        struct ll_protocol *ll_protocol = netdev->ll_protocol;
        unsigned int ll_addr_len = ll_protocol->ll_addr_len;

        mode->HwAddressSize = ll_addr_len;
        mode->MediaHeaderSize = ll_protocol->ll_header_len;
        mode->MaxPacketSize = netdev->mtu;
        mode->ReceiveFilterMask = ( EFI_SIMPLE_NETWORK_RECEIVE_UNICAST |
                                    EFI_SIMPLE_NETWORK_RECEIVE_MULTICAST |
                                    EFI_SIMPLE_NETWORK_RECEIVE_BROADCAST );
        assert ( ll_addr_len <= sizeof ( mode->CurrentAddress ) );
        memcpy ( &mode->CurrentAddress, netdev->ll_addr, ll_addr_len );
        memcpy ( &mode->BroadcastAddress, netdev->ll_broadcast, ll_addr_len );
        ll_protocol->init_addr ( netdev->hw_addr, &mode->PermanentAddress );
        mode->IfType = ntohs ( ll_protocol->ll_proto );
        mode->MacAddressChangeable = TRUE;
        mode->MediaPresentSupported = TRUE;
        mode->MediaPresent = ( netdev_link_ok ( netdev ) ? TRUE : FALSE );
}

References assert(), EFI_SIMPLE_NETWORK_RECEIVE_BROADCAST, EFI_SIMPLE_NETWORK_RECEIVE_MULTICAST, EFI_SIMPLE_NETWORK_RECEIVE_UNICAST, FALSE, net_device::hw_addr, ll_protocol::init_addr, net_device::ll_addr, ll_protocol::ll_addr_len, net_device::ll_broadcast, ll_protocol::ll_header_len, ll_protocol::ll_proto, net_device::ll_protocol, memcpy(), mode, efi_snp_device::mode, net_device::mtu, efi_snp_device::netdev, netdev, netdev_link_ok(), ntohs, and TRUE.

Referenced by efi_snp_probe().

efi_snp_flush()

static void efi_snp_flush ( struct efi_snp_device *  snpdev )

static

Flush transmit ring and receive queue.

Parameters

snpdev

SNP device

Definition at line 148 of file efi_snp.c.

                                                            {
        struct io_buffer *iobuf;
        struct io_buffer *tmp;

        /* Reset transmit completion ring */
        snpdev->tx_prod = 0;
        snpdev->tx_cons = 0;

        /* Discard any queued receive buffers */
        list_for_each_entry_safe ( iobuf, tmp, &snpdev->rx, list ) {
                list_del ( &iobuf->list );
                free_iob ( iobuf );
        }
}

References free_iob(), io_buffer::list, list_del, list_for_each_entry_safe, efi_snp_device::rx, tmp, efi_snp_device::tx_cons, and efi_snp_device::tx_prod.

Referenced by efi_snp_reset(), and efi_snp_shutdown().

efi_snp_poll()

static void efi_snp_poll ( struct efi_snp_device *  snpdev )

static

Poll net device and count received packets.

Parameters

snpdev

SNP device

Definition at line 168 of file efi_snp.c.

                                                           {
        EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
        struct io_buffer *iobuf;

        /* Poll network device */
        netdev_poll ( snpdev->netdev );

        /* Retrieve any received packets */
        while ( ( iobuf = netdev_rx_dequeue ( snpdev->netdev ) ) ) {
                list_add_tail ( &iobuf->list, &snpdev->rx );
                snpdev->interrupts |= EFI_SIMPLE_NETWORK_RECEIVE_INTERRUPT;
                bs->SignalEvent ( snpdev->snp.WaitForPacket );
        }
}

References EFI_SYSTEM_TABLE::BootServices, EFI_SIMPLE_NETWORK_RECEIVE_INTERRUPT, efi_systab, efi_snp_device::interrupts, io_buffer::list, list_add_tail, efi_snp_device::netdev, netdev_poll(), netdev_rx_dequeue(), efi_snp_device::rx, EFI_BOOT_SERVICES::SignalEvent, efi_snp_device::snp, and _EFI_SIMPLE_NETWORK_PROTOCOL::WaitForPacket.

Referenced by efi_snp_get_status(), efi_snp_receive(), and efi_snp_wait_for_packet().

efi_snp_start()

static EFI_STATUS EFIAPI efi_snp_start ( EFI_SIMPLE_NETWORK_PROTOCOL *  snp )

static

Change SNP state from "stopped" to "started".

Parameters

snp	SNP interface

Return values

efirc

EFI status code

Definition at line 190 of file efi_snp.c.

                                                   {
        struct efi_snp_device *snpdev =
                container_of ( snp, struct efi_snp_device, snp );

        DBGC ( snpdev, "SNPDEV %p START\n", snpdev );

        /* Allow start even if net device is currently claimed by iPXE */
        if ( efi_snp_claimed ) {
                DBGC ( snpdev, "SNPDEV %p allowing start while claimed\n",
                       snpdev );
        }

        snpdev->started = 1;
        efi_snp_set_state ( snpdev );
        return 0;
}

References container_of, DBGC, efi_snp_claimed, efi_snp_set_state(), efi_snp_device::snp, and efi_snp_device::started.

Referenced by efi_undi_start().

efi_snp_stop()

static EFI_STATUS EFIAPI efi_snp_stop ( EFI_SIMPLE_NETWORK_PROTOCOL *  snp )

static

Change SNP state from "started" to "stopped".

Parameters

snp	SNP interface

Return values

efirc

EFI status code

Definition at line 214 of file efi_snp.c.

                                                  {
        struct efi_snp_device *snpdev =
                container_of ( snp, struct efi_snp_device, snp );

        DBGC ( snpdev, "SNPDEV %p STOP\n", snpdev );

        /* Fail if net device is currently claimed for use by iPXE */
        if ( efi_snp_claimed )
                return EFI_NOT_READY;

        snpdev->started = 0;
        efi_snp_set_state ( snpdev );

        return 0;
}

References container_of, DBGC, EFI_NOT_READY, efi_snp_claimed, efi_snp_set_state(), efi_snp_device::snp, and efi_snp_device::started.

Referenced by efi_undi_stop().

efi_snp_initialize()

static EFI_STATUS EFIAPI efi_snp_initialize ( EFI_SIMPLE_NETWORK_PROTOCOL *  snp, UINTN  extra_rx_bufsize, UINTN  extra_tx_bufsize  )

static

Open the network device.

Parameters

snp	SNP interface
extra_rx_bufsize	Extra RX buffer size, in bytes
extra_tx_bufsize	Extra TX buffer size, in bytes

Return values

efirc

EFI status code

Definition at line 239 of file efi_snp.c.

                                                                      {
        struct efi_snp_device *snpdev =
                container_of ( snp, struct efi_snp_device, snp );
        struct efi_saved_tpl tpl;
        int rc;

        DBGC ( snpdev, "SNPDEV %p INITIALIZE (%ld extra RX, %ld extra TX)\n",
               snpdev, ( ( unsigned long ) extra_rx_bufsize ),
               ( ( unsigned long ) extra_tx_bufsize ) );

        /* Do nothing if net device is currently claimed for use by
         * iPXE.  Do not return an error, because this will cause
         * MnpDxe et al to fail to install the relevant child handles
         * and to leave behind a partially initialised device handle
         * that can cause a later system crash.
         */
        if ( efi_snp_claimed ) {
                DBGC ( snpdev, "SNPDEV %p ignoring initialization while "
                       "claimed\n", snpdev );
                return 0;
        }

        /* Raise TPL */
        efi_raise_tpl ( &tpl );

        /* Open network device */
        if ( ( rc = netdev_open ( snpdev->netdev ) ) != 0 ) {
                DBGC ( snpdev, "SNPDEV %p could not open %s: %s\n",
                       snpdev, snpdev->netdev->name, strerror ( rc ) );
                goto err_open;
        }
        efi_snp_set_state ( snpdev );

 err_open:
        efi_restore_tpl ( &tpl );
        return EFIRC ( rc );
}

References container_of, DBGC, efi_raise_tpl(), efi_restore_tpl(), efi_snp_claimed, efi_snp_set_state(), EFIRC, net_device::name, efi_snp_device::netdev, netdev_open(), rc, efi_snp_device::snp, and strerror().

Referenced by efi_undi_initialize().

efi_snp_reset()

static EFI_STATUS EFIAPI efi_snp_reset ( EFI_SIMPLE_NETWORK_PROTOCOL *  snp, BOOLEAN  ext_verify  )

static

Reset the network device.

Parameters

snp	SNP interface
ext_verify	Extended verification required

Return values

efirc

EFI status code

Definition at line 286 of file efi_snp.c.

                                                                       {
        struct efi_snp_device *snpdev =
                container_of ( snp, struct efi_snp_device, snp );
        struct efi_saved_tpl tpl;
        int rc;

        DBGC ( snpdev, "SNPDEV %p RESET (%s extended verification)\n",
               snpdev, ( ext_verify ? "with" : "without" ) );

        /* Fail if net device is currently claimed for use by iPXE */
        if ( efi_snp_claimed ) {
                rc = -EAGAIN;
                goto err_claimed;
        }

        /* Raise TPL */
        efi_raise_tpl ( &tpl );

        /* Close network device */
        netdev_close ( snpdev->netdev );
        efi_snp_set_state ( snpdev );
        efi_snp_flush ( snpdev );

        /* Reopen network device */
        if ( ( rc = netdev_open ( snpdev->netdev ) ) != 0 ) {
                DBGC ( snpdev, "SNPDEV %p could not reopen %s: %s\n",
                       snpdev, snpdev->netdev->name, strerror ( rc ) );
                goto err_open;
        }
        efi_snp_set_state ( snpdev );

 err_open:
        efi_restore_tpl ( &tpl );
 err_claimed:
        return EFIRC ( rc );
}

References container_of, DBGC, EAGAIN, efi_raise_tpl(), efi_restore_tpl(), efi_snp_claimed, efi_snp_flush(), efi_snp_set_state(), EFIRC, net_device::name, efi_snp_device::netdev, netdev_close(), netdev_open(), rc, efi_snp_device::snp, and strerror().

Referenced by efi_undi_reset().

efi_snp_shutdown()

static EFI_STATUS EFIAPI efi_snp_shutdown ( EFI_SIMPLE_NETWORK_PROTOCOL *  snp )

static

Shut down the network device.

Parameters

snp	SNP interface

Return values

efirc

EFI status code

Definition at line 330 of file efi_snp.c.

                                                      {
        struct efi_snp_device *snpdev =
                container_of ( snp, struct efi_snp_device, snp );
        struct efi_saved_tpl tpl;

        DBGC ( snpdev, "SNPDEV %p SHUTDOWN\n", snpdev );

        /* Fail if net device is currently claimed for use by iPXE */
        if ( efi_snp_claimed )
                return EFI_NOT_READY;

        /* Raise TPL */
        efi_raise_tpl ( &tpl );

        /* Close network device */
        netdev_close ( snpdev->netdev );
        efi_snp_set_state ( snpdev );
        efi_snp_flush ( snpdev );

        /* Restore TPL */
        efi_restore_tpl ( &tpl );

        return 0;
}

References container_of, DBGC, EFI_NOT_READY, efi_raise_tpl(), efi_restore_tpl(), efi_snp_claimed, efi_snp_flush(), efi_snp_set_state(), efi_snp_device::netdev, netdev_close(), and efi_snp_device::snp.

Referenced by efi_undi_shutdown().

efi_snp_receive_filters()

static EFI_STATUS EFIAPI efi_snp_receive_filters ( EFI_SIMPLE_NETWORK_PROTOCOL *  snp, UINT32  enable, UINT32  disable, BOOLEAN  mcast_reset, UINTN  mcast_count, EFI_MAC_ADDRESS *  mcast  )

static

Manage receive filters.

Parameters

snp	SNP interface
enable	Receive filters to enable
disable	Receive filters to disable
mcast_reset	Reset multicast filters
mcast_count	Number of multicast filters
mcast	Multicast filters

Return values

efirc

EFI status code

Definition at line 367 of file efi_snp.c.

                                                                      {
        struct efi_snp_device *snpdev =
                container_of ( snp, struct efi_snp_device, snp );
        unsigned int i;

        DBGC ( snpdev, "SNPDEV %p RECEIVE_FILTERS %08x&~%08x%s %ld mcast\n",
               snpdev, enable, disable, ( mcast_reset ? " reset" : "" ),
               ( ( unsigned long ) mcast_count ) );
        for ( i = 0 ; i < mcast_count ; i++ ) {
                DBGC2_HDA ( snpdev, i, &mcast[i],
                            snpdev->netdev->ll_protocol->ll_addr_len );
        }

        /* Lie through our teeth, otherwise MNP refuses to accept us.
         *
         * Return success even if the SNP device is currently claimed
         * for use by iPXE, since otherwise Windows Deployment
         * Services refuses to attempt to receive further packets via
         * our EFI PXE Base Code protocol.
         */
        return 0;
}

References container_of, DBGC, DBGC2_HDA, ll_protocol::ll_addr_len, net_device::ll_protocol, efi_snp_device::netdev, and efi_snp_device::snp.

efi_snp_station_address()

static EFI_STATUS EFIAPI efi_snp_station_address ( EFI_SIMPLE_NETWORK_PROTOCOL *  snp, BOOLEAN  reset, EFI_MAC_ADDRESS *  new  )

static

Set station address.

Parameters

snp	SNP interface
reset	Reset to permanent address
new	New station address

Return values

efirc

EFI status code

Definition at line 401 of file efi_snp.c.

                                                 {
        struct efi_snp_device *snpdev =
                container_of ( snp, struct efi_snp_device, snp );
        struct ll_protocol *ll_protocol = snpdev->netdev->ll_protocol;

        DBGC ( snpdev, "SNPDEV %p STATION_ADDRESS %s\n", snpdev,
               ( reset ? "reset" : ll_protocol->ntoa ( new ) ) );

        /* Fail if net device is currently claimed for use by iPXE */
        if ( efi_snp_claimed )
                return EFI_NOT_READY;

        /* Set the MAC address */
        if ( reset )
                new = &snpdev->mode.PermanentAddress;
        memcpy ( snpdev->netdev->ll_addr, new, ll_protocol->ll_addr_len );

        /* MAC address changes take effect only on netdev_open() */
        if ( netdev_is_open ( snpdev->netdev ) ) {
                DBGC ( snpdev, "SNPDEV %p MAC address changed while net "
                       "device open\n", snpdev );
        }

        return 0;
}

References container_of, DBGC, EFI_NOT_READY, efi_snp_claimed, net_device::ll_addr, ll_protocol::ll_addr_len, net_device::ll_protocol, memcpy(), efi_snp_device::mode, efi_snp_device::netdev, netdev_is_open(), ll_protocol::ntoa, EFI_SIMPLE_NETWORK_MODE::PermanentAddress, and efi_snp_device::snp.

Referenced by efi_undi_station_address().

efi_snp_statistics()

static EFI_STATUS EFIAPI efi_snp_statistics ( EFI_SIMPLE_NETWORK_PROTOCOL *  snp, BOOLEAN  reset, UINTN *  stats_len, EFI_NETWORK_STATISTICS *  stats  )

static

Get (or reset) statistics.

Parameters

snp	SNP interface
reset	Reset statistics
stats_len	Size of statistics table
stats	Statistics table

Return values

efirc

EFI status code

Definition at line 438 of file efi_snp.c.

                                                                       {
        struct efi_snp_device *snpdev =
                container_of ( snp, struct efi_snp_device, snp );
        EFI_NETWORK_STATISTICS stats_buf;

        DBGC ( snpdev, "SNPDEV %p STATISTICS%s", snpdev,
               ( reset ? " reset" : "" ) );

        /* Fail if net device is currently claimed for use by iPXE */
        if ( efi_snp_claimed )
                return EFI_NOT_READY;

        /* Gather statistics */
        memset ( &stats_buf, 0, sizeof ( stats_buf ) );
        stats_buf.TxGoodFrames = snpdev->netdev->tx_stats.good;
        stats_buf.TxDroppedFrames = snpdev->netdev->tx_stats.bad;
        stats_buf.TxTotalFrames = ( snpdev->netdev->tx_stats.good +
                                    snpdev->netdev->tx_stats.bad );
        stats_buf.RxGoodFrames = snpdev->netdev->rx_stats.good;
        stats_buf.RxDroppedFrames = snpdev->netdev->rx_stats.bad;
        stats_buf.RxTotalFrames = ( snpdev->netdev->rx_stats.good +
                                    snpdev->netdev->rx_stats.bad );
        if ( *stats_len > sizeof ( stats_buf ) )
                *stats_len = sizeof ( stats_buf );
        if ( stats )
                memcpy ( stats, &stats_buf, *stats_len );

        /* Reset statistics if requested to do so */
        if ( reset ) {
                memset ( &snpdev->netdev->tx_stats, 0,
                         sizeof ( snpdev->netdev->tx_stats ) );
                memset ( &snpdev->netdev->rx_stats, 0,
                         sizeof ( snpdev->netdev->rx_stats ) );
        }

        return 0;
}

References net_device_stats::bad, container_of, DBGC, EFI_NOT_READY, efi_snp_claimed, net_device_stats::good, memcpy(), memset(), efi_snp_device::netdev, net_device::rx_stats, EFI_NETWORK_STATISTICS::RxDroppedFrames, EFI_NETWORK_STATISTICS::RxGoodFrames, EFI_NETWORK_STATISTICS::RxTotalFrames, efi_snp_device::snp, net_device::tx_stats, EFI_NETWORK_STATISTICS::TxDroppedFrames, EFI_NETWORK_STATISTICS::TxGoodFrames, and EFI_NETWORK_STATISTICS::TxTotalFrames.

efi_snp_mcast_ip_to_mac()

static EFI_STATUS EFIAPI efi_snp_mcast_ip_to_mac ( EFI_SIMPLE_NETWORK_PROTOCOL *  snp, BOOLEAN  ipv6, EFI_IP_ADDRESS *  ip, EFI_MAC_ADDRESS *  mac  )

static

Convert multicast IP address to MAC address.

Parameters

snp	SNP interface
ipv6	Address is IPv6
ip	IP address
mac	MAC address

Return values

efirc

EFI status code

Definition at line 487 of file efi_snp.c.

                                                                     {
        struct efi_snp_device *snpdev =
                container_of ( snp, struct efi_snp_device, snp );
        struct ll_protocol *ll_protocol = snpdev->netdev->ll_protocol;
        const char *ip_str;
        int rc;

        ip_str = ( ipv6 ? "(IPv6)" /* FIXME when we have inet6_ntoa() */ :
                   inet_ntoa ( *( ( struct in_addr * ) ip ) ) );
        DBGC ( snpdev, "SNPDEV %p MCAST_IP_TO_MAC %s\n", snpdev, ip_str );

        /* Fail if net device is currently claimed for use by iPXE */
        if ( efi_snp_claimed )
                return EFI_NOT_READY;

        /* Try to hash the address */
        if ( ( rc = ll_protocol->mc_hash ( ( ipv6 ? AF_INET6 : AF_INET ),
                                           ip, mac ) ) != 0 ) {
                DBGC ( snpdev, "SNPDEV %p could not hash %s: %s\n",
                       snpdev, ip_str, strerror ( rc ) );
                return EFIRC ( rc );
        }

        return 0;
}

References AF_INET, AF_INET6, container_of, DBGC, EFI_NOT_READY, efi_snp_claimed, EFIRC, inet_ntoa(), ip, net_device::ll_protocol, mac, ll_protocol::mc_hash, efi_snp_device::netdev, rc, efi_snp_device::snp, and strerror().

efi_snp_nvdata()

static EFI_STATUS EFIAPI efi_snp_nvdata ( EFI_SIMPLE_NETWORK_PROTOCOL *  snp, BOOLEAN  read, UINTN  offset, UINTN  len, VOID *  data  )

static

Read or write non-volatile storage.

Parameters

snp	SNP interface
read	Operation is a read
offset	Starting offset within NVRAM
len	Length of data buffer
data	Data buffer

Return values

efirc

EFI status code

Definition at line 525 of file efi_snp.c.

                                                       {
        struct efi_snp_device *snpdev =
                container_of ( snp, struct efi_snp_device, snp );

        DBGC ( snpdev, "SNPDEV %p NVDATA %s %lx+%lx\n", snpdev,
               ( read ? "read" : "write" ), ( ( unsigned long ) offset ),
               ( ( unsigned long ) len ) );
        if ( ! read )
                DBGC2_HDA ( snpdev, offset, data, len );

        /* Fail if net device is currently claimed for use by iPXE */
        if ( efi_snp_claimed )
                return EFI_NOT_READY;

        return EFI_UNSUPPORTED;
}

References container_of, data, DBGC, DBGC2_HDA, EFI_NOT_READY, efi_snp_claimed, EFI_UNSUPPORTED, len, offset, read, and efi_snp_device::snp.

efi_snp_get_status()

static EFI_STATUS EFIAPI efi_snp_get_status ( EFI_SIMPLE_NETWORK_PROTOCOL *  snp, UINT32 *  interrupts, VOID **  txbuf  )

static

Read interrupt status and TX recycled buffer status.

Parameters

snp	SNP interface
interrupts	Interrupt status, or NULL
txbuf	Recycled transmit buffer address, or NULL

Return values

efirc

EFI status code

Definition at line 552 of file efi_snp.c.

                                                        {
        struct efi_snp_device *snpdev =
                container_of ( snp, struct efi_snp_device, snp );
        struct efi_saved_tpl tpl;

        DBGC2 ( snpdev, "SNPDEV %p GET_STATUS", snpdev );

        /* Fail if net device is currently claimed for use by iPXE */
        if ( efi_snp_claimed ) {
                DBGC2 ( snpdev, "\n" );
                return EFI_NOT_READY;
        }

        /* Raise TPL */
        efi_raise_tpl ( &tpl );

        /* Poll the network device */
        efi_snp_poll ( snpdev );

        /* Interrupt status.  In practice, this seems to be used only
         * to detect TX completions.
         */
        if ( interrupts ) {
                *interrupts = snpdev->interrupts;
                DBGC2 ( snpdev, " INTS:%02x", *interrupts );
                snpdev->interrupts = 0;
        }

        /* TX completions */
        if ( txbuf ) {
                if ( snpdev->tx_prod != snpdev->tx_cons ) {
                        *txbuf = snpdev->tx[snpdev->tx_cons++ % EFI_SNP_NUM_TX];
                } else {
                        *txbuf = NULL;
                }
                DBGC2 ( snpdev, " TX:%p", *txbuf );
        }

        /* Restore TPL */
        efi_restore_tpl ( &tpl );

        DBGC2 ( snpdev, "\n" );
        return 0;
}

References container_of, DBGC2, EFI_NOT_READY, efi_raise_tpl(), efi_restore_tpl(), efi_snp_claimed, EFI_SNP_NUM_TX, efi_snp_poll(), efi_snp_device::interrupts, NULL, efi_snp_device::snp, efi_snp_device::tx, efi_snp_device::tx_cons, and efi_snp_device::tx_prod.

Referenced by efi_undi_get_status().

efi_snp_transmit()

static EFI_STATUS EFIAPI efi_snp_transmit ( EFI_SIMPLE_NETWORK_PROTOCOL *  snp, UINTN  ll_header_len, UINTN  len, VOID *  data, EFI_MAC_ADDRESS *  ll_src, EFI_MAC_ADDRESS *  ll_dest, UINT16 *  net_proto  )

static

Start packet transmission.

Parameters

snp	SNP interface
ll_header_len	Link-layer header length, if to be filled in
len	Length of data buffer
data	Data buffer
ll_src	Link-layer source address, if specified
ll_dest	Link-layer destination address, if specified
net_proto	Network-layer protocol (in host order)

Return values

efirc

EFI status code

Definition at line 611 of file efi_snp.c.

                                       {
        struct efi_snp_device *snpdev =
                container_of ( snp, struct efi_snp_device, snp );
        struct ll_protocol *ll_protocol = snpdev->netdev->ll_protocol;
        struct efi_saved_tpl tpl;
        struct io_buffer *iobuf;
        size_t payload_len;
        unsigned int tx_fill;
        int rc;

        DBGC2 ( snpdev, "SNPDEV %p TRANSMIT %p+%lx", snpdev, data,
                ( ( unsigned long ) len ) );
        if ( ll_header_len ) {
                if ( ll_src ) {
                        DBGC2 ( snpdev, " src %s",
                                ll_protocol->ntoa ( ll_src ) );
                }
                if ( ll_dest ) {
                        DBGC2 ( snpdev, " dest %s",
                                ll_protocol->ntoa ( ll_dest ) );
                }
                if ( net_proto ) {
                        DBGC2 ( snpdev, " proto %04x", *net_proto );
                }
        }
        DBGC2 ( snpdev, "\n" );

        /* Fail if net device is currently claimed for use by iPXE */
        if ( efi_snp_claimed ) {
                rc = -EAGAIN;
                goto err_claimed;
        }

        /* Raise TPL */
        efi_raise_tpl ( &tpl );

        /* Sanity checks */
        if ( ll_header_len ) {
                if ( ll_header_len != ll_protocol->ll_header_len ) {
                        DBGC ( snpdev, "SNPDEV %p TX invalid header length "
                               "%ld\n", snpdev,
                               ( ( unsigned long ) ll_header_len ) );
                        rc = -EINVAL;
                        goto err_sanity;
                }
                if ( len < ll_header_len ) {
                        DBGC ( snpdev, "SNPDEV %p invalid packet length %ld\n",
                               snpdev, ( ( unsigned long ) len ) );
                        rc = -EINVAL;
                        goto err_sanity;
                }
                if ( ! ll_dest ) {
                        DBGC ( snpdev, "SNPDEV %p TX missing destination "
                               "address\n", snpdev );
                        rc = -EINVAL;
                        goto err_sanity;
                }
                if ( ! net_proto ) {
                        DBGC ( snpdev, "SNPDEV %p TX missing network "
                               "protocol\n", snpdev );
                        rc = -EINVAL;
                        goto err_sanity;
                }
                if ( ! ll_src )
                        ll_src = &snpdev->mode.CurrentAddress;
        }

        /* Allocate buffer */
        payload_len = ( len - ll_protocol->ll_header_len );
        iobuf = alloc_iob ( MAX_LL_HEADER_LEN + ( ( payload_len > IOB_ZLEN ) ?
                                                  payload_len : IOB_ZLEN ) );
        if ( ! iobuf ) {
                DBGC ( snpdev, "SNPDEV %p TX could not allocate %ld-byte "
                       "buffer\n", snpdev, ( ( unsigned long ) len ) );
                rc = -ENOMEM;
                goto err_alloc_iob;
        }
        iob_reserve ( iobuf, ( MAX_LL_HEADER_LEN -
                               ll_protocol->ll_header_len ) );
        memcpy ( iob_put ( iobuf, len ), data, len );

        /* Create link-layer header, if specified */
        if ( ll_header_len ) {
                iob_pull ( iobuf, ll_protocol->ll_header_len );
                if ( ( rc = ll_protocol->push ( snpdev->netdev,
                                                iobuf, ll_dest, ll_src,
                                                htons ( *net_proto ) )) != 0 ){
                        DBGC ( snpdev, "SNPDEV %p TX could not construct "
                               "header: %s\n", snpdev, strerror ( rc ) );
                        goto err_ll_push;
                }
        }

        /* Transmit packet */
        if ( ( rc = netdev_tx ( snpdev->netdev, iob_disown ( iobuf ) ) ) != 0){
                DBGC ( snpdev, "SNPDEV %p TX could not transmit: %s\n",
                       snpdev, strerror ( rc ) );
                goto err_tx;
        }

        /* Record in transmit completion ring.  If we run out of
         * space, report the failure even though we have already
         * transmitted the packet.
         *
         * This allows us to report completions only for packets for
         * which we had reported successfully initiating transmission,
         * while continuing to support clients that never poll for
         * transmit completions.
         */
        tx_fill = ( snpdev->tx_prod - snpdev->tx_cons );
        if ( tx_fill >= EFI_SNP_NUM_TX ) {
                DBGC ( snpdev, "SNPDEV %p TX completion ring full\n", snpdev );
                rc = -ENOBUFS;
                goto err_ring_full;
        }
        snpdev->tx[ snpdev->tx_prod++ % EFI_SNP_NUM_TX ] = data;
        snpdev->interrupts |= EFI_SIMPLE_NETWORK_TRANSMIT_INTERRUPT;

        /* Restore TPL */
        efi_restore_tpl ( &tpl );

        return 0;

 err_ring_full:
 err_tx:
 err_ll_push:
        free_iob ( iobuf );
 err_alloc_iob:
 err_sanity:
        efi_restore_tpl ( &tpl );
 err_claimed:
        return EFIRC ( rc );
}

References alloc_iob(), container_of, EFI_SIMPLE_NETWORK_MODE::CurrentAddress, data, DBGC, DBGC2, EAGAIN, efi_raise_tpl(), efi_restore_tpl(), EFI_SIMPLE_NETWORK_TRANSMIT_INTERRUPT, efi_snp_claimed, EFI_SNP_NUM_TX, EFIRC, EINVAL, ENOBUFS, ENOMEM, free_iob(), htons, efi_snp_device::interrupts, iob_disown, iob_pull, iob_put, iob_reserve, IOB_ZLEN, len, ll_protocol::ll_header_len, net_device::ll_protocol, MAX_LL_HEADER_LEN, memcpy(), efi_snp_device::mode, efi_snp_device::netdev, netdev_tx(), ll_protocol::ntoa, ll_protocol::push, rc, efi_snp_device::snp, strerror(), efi_snp_device::tx, efi_snp_device::tx_cons, and efi_snp_device::tx_prod.

Referenced by efi_undi_transmit().

efi_snp_receive()

static EFI_STATUS EFIAPI efi_snp_receive ( EFI_SIMPLE_NETWORK_PROTOCOL *  snp, UINTN *  ll_header_len, UINTN *  len, VOID *  data, EFI_MAC_ADDRESS *  ll_src, EFI_MAC_ADDRESS *  ll_dest, UINT16 *  net_proto  )

static

Receive packet.

Parameters

snp	SNP interface
ll_header_len	Link-layer header length, if to be filled in
len	Length of data buffer
data	Data buffer
ll_src	Link-layer source address, if specified
ll_dest	Link-layer destination address, if specified
net_proto	Network-layer protocol (in host order)

Return values

efirc

EFI status code

Definition at line 761 of file efi_snp.c.

                                      {
        struct efi_snp_device *snpdev =
                container_of ( snp, struct efi_snp_device, snp );
        struct ll_protocol *ll_protocol = snpdev->netdev->ll_protocol;
        struct efi_saved_tpl tpl;
        struct io_buffer *iobuf;
        const void *iob_ll_dest;
        const void *iob_ll_src;
        uint16_t iob_net_proto;
        unsigned int iob_flags;
        size_t copy_len;
        int rc;

        DBGC2 ( snpdev, "SNPDEV %p RECEIVE %p(+%lx)", snpdev, data,
                ( ( unsigned long ) *len ) );

        /* Fail if net device is currently claimed for use by iPXE */
        if ( efi_snp_claimed ) {
                rc = -EAGAIN;
                goto err_claimed;
        }

        /* Raise TPL */
        efi_raise_tpl ( &tpl );

        /* Poll the network device */
        efi_snp_poll ( snpdev );

        /* Check for an available packet */
        iobuf = list_first_entry ( &snpdev->rx, struct io_buffer, list );
        if ( ! iobuf ) {
                DBGC2 ( snpdev, "\n" );
                rc = -EAGAIN;
                goto out_no_packet;
        }
        DBGC2 ( snpdev, "+%zx\n", iob_len ( iobuf ) );

        /* Dequeue packet */
        list_del ( &iobuf->list );

        /* Return packet to caller, truncating to buffer length */
        copy_len = iob_len ( iobuf );
        if ( copy_len > *len )
                copy_len = *len;
        memcpy ( data, iobuf->data, copy_len );
        *len = iob_len ( iobuf );

        /* Attempt to decode link-layer header */
        if ( ( rc = ll_protocol->pull ( snpdev->netdev, iobuf, &iob_ll_dest,
                                        &iob_ll_src, &iob_net_proto,
                                        &iob_flags ) ) != 0 ) {
                DBGC ( snpdev, "SNPDEV %p could not parse header: %s\n",
                       snpdev, strerror ( rc ) );
                goto out_bad_ll_header;
        }

        /* Return link-layer header parameters to caller, if required */
        if ( ll_header_len )
                *ll_header_len = ll_protocol->ll_header_len;
        if ( ll_src )
                memcpy ( ll_src, iob_ll_src, ll_protocol->ll_addr_len );
        if ( ll_dest )
                memcpy ( ll_dest, iob_ll_dest, ll_protocol->ll_addr_len );
        if ( net_proto )
                *net_proto = ntohs ( iob_net_proto );

        /* Check buffer length */
        rc = ( ( copy_len == *len ) ? 0 : -ERANGE );

 out_bad_ll_header:
        free_iob ( iobuf );
 out_no_packet:
        efi_restore_tpl ( &tpl );
 err_claimed:
        return EFIRC ( rc );
}

References container_of, data, io_buffer::data, DBGC, DBGC2, EAGAIN, efi_raise_tpl(), efi_restore_tpl(), efi_snp_claimed, efi_snp_poll(), EFIRC, ERANGE, free_iob(), iob_len(), len, io_buffer::list, list_del, list_first_entry, ll_protocol::ll_addr_len, ll_protocol::ll_header_len, net_device::ll_protocol, memcpy(), efi_snp_device::netdev, ntohs, ll_protocol::pull, rc, efi_snp_device::rx, efi_snp_device::snp, and strerror().

Referenced by efi_undi_receive().

efi_snp_wait_for_packet()

static VOID EFIAPI efi_snp_wait_for_packet ( EFI_EVENT event  __unused, VOID *  context  )

static

Poll event.

Parameters

event	Event
context	Event context

Definition at line 847 of file efi_snp.c.

                                                             {
        struct efi_snp_device *snpdev = context;
        struct efi_saved_tpl tpl;

        DBGCP ( snpdev, "SNPDEV %p WAIT_FOR_PACKET\n", snpdev );

        /* Do nothing unless the net device is open */
        if ( ! netdev_is_open ( snpdev->netdev ) )
                return;

        /* Do nothing if net device is currently claimed for use by iPXE */
        if ( efi_snp_claimed )
                return;

        /* Raise TPL */
        efi_raise_tpl ( &tpl );

        /* Poll the network device */
        efi_snp_poll ( snpdev );

        /* Restore TPL */
        efi_restore_tpl ( &tpl );
}

References DBGCP, efi_raise_tpl(), efi_restore_tpl(), efi_snp_claimed, efi_snp_poll(), efi_snp_device::netdev, and netdev_is_open().

Referenced by efi_snp_probe().

efi_undi_checksum()

static uint8_t efi_undi_checksum ( void *  data, size_t  len  )

static

Calculate UNDI byte checksum.

Parameters

data	Data
len	Length of data

Return values

sum

Checksum

Definition at line 921 of file efi_snp.c.

                                                            {
        uint8_t *bytes = data;
        uint8_t sum = 0;

        while ( len-- )
                sum += *bytes++;
        return sum;
}

References bytes, data, and len.

Referenced by efi_snp_probe().

efi_undi_ifnum()

static unsigned int efi_undi_ifnum ( struct efi_snp_device *  snpdev )

static

Get UNDI SNP device interface number.

Parameters

snpdev

SNP device

Return values

ifnum

UNDI interface number

Definition at line 936 of file efi_snp.c.

                                                                     {

        /* iPXE network device scope IDs are one-based (leaving zero
         * meaning "unspecified").  UNDI interface numbers are
         * zero-based.
         */
        return ( snpdev->netdev->scope_id - 1 );
}

References efi_snp_device::netdev, and net_device::scope_id.

Referenced by efi_snp_probe(), and efi_undi_snpdev().

efi_undi_snpdev()

static struct efi_snp_device* efi_undi_snpdev ( unsigned int  ifnum )

static

Identify UNDI SNP device.

Parameters

ifnum

Interface number

Return values

snpdev

SNP device, or NULL if not found

Definition at line 951 of file efi_snp.c.

                                                                      {
        struct efi_snp_device *snpdev;

        list_for_each_entry ( snpdev, &efi_snp_devices, list ) {
                if ( efi_undi_ifnum ( snpdev ) == ifnum )
                        return snpdev;
        }
        return NULL;
}

References efi_undi_ifnum(), efi_snp_device::list, list_for_each_entry, and NULL.

Referenced by efi_undi_issue().

efi_undi_statcode()

static PXE_STATCODE efi_undi_statcode ( EFI_STATUS  efirc )

static

Convert EFI status code to UNDI status code.

Parameters

efirc

EFI status code

Return values

statcode

UNDI status code

Definition at line 967 of file efi_snp.c.

                                                           {

        switch ( efirc ) {
        case EFI_INVALID_PARAMETER:     return PXE_STATCODE_INVALID_PARAMETER;
        case EFI_UNSUPPORTED:           return PXE_STATCODE_UNSUPPORTED;
        case EFI_OUT_OF_RESOURCES:      return PXE_STATCODE_BUFFER_FULL;
        case EFI_PROTOCOL_ERROR:        return PXE_STATCODE_DEVICE_FAILURE;
        case EFI_NOT_READY:             return PXE_STATCODE_NO_DATA;
        default:
                return PXE_STATCODE_INVALID_CDB;
        }
}

References EFI_INVALID_PARAMETER, EFI_NOT_READY, EFI_OUT_OF_RESOURCES, EFI_PROTOCOL_ERROR, EFI_UNSUPPORTED, PXE_STATCODE_BUFFER_FULL, PXE_STATCODE_DEVICE_FAILURE, PXE_STATCODE_INVALID_CDB, PXE_STATCODE_INVALID_PARAMETER, PXE_STATCODE_NO_DATA, and PXE_STATCODE_UNSUPPORTED.

Referenced by efi_undi_issue().

efi_undi_get_state()

static EFI_STATUS efi_undi_get_state ( struct efi_snp_device *  snpdev, PXE_CDB *  cdb  )

static

Get state.

Parameters

snpdev	SNP device
cdb	Command description block

Return values

efirc

EFI status code

Definition at line 987 of file efi_snp.c.

                                                      {
        EFI_SIMPLE_NETWORK_MODE *mode = &snpdev->mode;

        DBGC ( snpdev, "UNDI %p GET STATE\n", snpdev );

        /* Return current state */
        if ( mode->State == EfiSimpleNetworkInitialized ) {
                cdb->StatFlags |= PXE_STATFLAGS_GET_STATE_INITIALIZED;
        } else if ( mode->State == EfiSimpleNetworkStarted ) {
                cdb->StatFlags |= PXE_STATFLAGS_GET_STATE_STARTED;
        } else {
                cdb->StatFlags |= PXE_STATFLAGS_GET_STATE_STOPPED;
        }

        return 0;
}

References DBGC, EfiSimpleNetworkInitialized, EfiSimpleNetworkStarted, mode, efi_snp_device::mode, PXE_STATFLAGS_GET_STATE_INITIALIZED, PXE_STATFLAGS_GET_STATE_STARTED, PXE_STATFLAGS_GET_STATE_STOPPED, and s_pxe_cdb::StatFlags.

Referenced by efi_undi_issue().

efi_undi_start()

static EFI_STATUS efi_undi_start ( struct efi_snp_device *  snpdev )

static

Start.

Parameters

snpdev

SNP device

Return values

efirc

EFI status code

Definition at line 1011 of file efi_snp.c.

                                                                   {
        EFI_STATUS efirc;

        DBGC ( snpdev, "UNDI %p START\n", snpdev );

        /* Start SNP device */
        if ( ( efirc = efi_snp_start ( &snpdev->snp ) ) != 0 )
                return efirc;

        return 0;
}

References DBGC, efi_snp_start(), and efi_snp_device::snp.

Referenced by efi_undi_issue().

efi_undi_stop()

static EFI_STATUS efi_undi_stop ( struct efi_snp_device *  snpdev )

static

Stop.

Parameters

snpdev

SNP device

Return values

efirc

EFI status code

Definition at line 1029 of file efi_snp.c.

                                                                  {
        EFI_STATUS efirc;

        DBGC ( snpdev, "UNDI %p STOP\n", snpdev );

        /* Stop SNP device */
        if ( ( efirc = efi_snp_stop ( &snpdev->snp ) ) != 0 )
                return efirc;

        return 0;
}

References DBGC, efi_snp_stop(), and efi_snp_device::snp.

Referenced by efi_undi_issue().

efi_undi_get_init_info()

static EFI_STATUS efi_undi_get_init_info ( struct efi_snp_device *  snpdev, PXE_CDB *  cdb, PXE_DB_GET_INIT_INFO *  db  )

static

Get initialisation information.

Parameters

snpdev	SNP device
cdb	Command description block
db	Data block

Return values

efirc

EFI status code

Definition at line 1049 of file efi_snp.c.

                                                                      {
        struct net_device *netdev = snpdev->netdev;
        struct ll_protocol *ll_protocol = netdev->ll_protocol;

        DBGC ( snpdev, "UNDI %p GET INIT INFO\n", snpdev );

        /* Populate structure */
        memset ( db, 0, sizeof ( *db ) );
        db->FrameDataLen = ( netdev->max_pkt_len - ll_protocol->ll_header_len );
        db->MediaHeaderLen = ll_protocol->ll_header_len;
        db->HWaddrLen = ll_protocol->ll_addr_len;
        db->IFtype = ntohs ( ll_protocol->ll_proto );
        cdb->StatFlags |= ( PXE_STATFLAGS_CABLE_DETECT_SUPPORTED |
                            PXE_STATFLAGS_GET_STATUS_NO_MEDIA_SUPPORTED );

        return 0;
}

References db, DBGC, ll_protocol::ll_addr_len, ll_protocol::ll_header_len, ll_protocol::ll_proto, net_device::ll_protocol, net_device::max_pkt_len, memset(), efi_snp_device::netdev, netdev, ntohs, PXE_STATFLAGS_CABLE_DETECT_SUPPORTED, PXE_STATFLAGS_GET_STATUS_NO_MEDIA_SUPPORTED, and s_pxe_cdb::StatFlags.

Referenced by efi_undi_issue().

efi_undi_initialize()

static EFI_STATUS efi_undi_initialize ( struct efi_snp_device *  snpdev, PXE_CDB *  cdb  )

static

Initialise.

Parameters

snpdev	SNP device
cdb	Command description block
efirc	EFI status code

Definition at line 1076 of file efi_snp.c.

                                                       {
        struct net_device *netdev = snpdev->netdev;
        EFI_STATUS efirc;

        DBGC ( snpdev, "UNDI %p INITIALIZE\n", snpdev );

        /* Reset SNP device */
        if ( ( efirc = efi_snp_initialize ( &snpdev->snp, 0, 0 ) ) != 0 )
                return efirc;

        /* Report link state */
        if ( ! netdev_link_ok ( netdev ) )
                cdb->StatFlags |= PXE_STATFLAGS_INITIALIZED_NO_MEDIA;

        return 0;
}

References DBGC, efi_snp_initialize(), efi_snp_device::netdev, netdev, netdev_link_ok(), PXE_STATFLAGS_INITIALIZED_NO_MEDIA, efi_snp_device::snp, and s_pxe_cdb::StatFlags.

Referenced by efi_undi_issue().

efi_undi_reset()

static EFI_STATUS efi_undi_reset ( struct efi_snp_device *  snpdev )

static

Reset.

Parameters

snpdev	SNP device
efirc	EFI status code

Definition at line 1100 of file efi_snp.c.

                                                                   {
        EFI_STATUS efirc;

        DBGC ( snpdev, "UNDI %p RESET\n", snpdev );

        /* Reset SNP device */
        if ( ( efirc = efi_snp_reset ( &snpdev->snp, 0 ) ) != 0 )
                return efirc;

        return 0;
}

References DBGC, efi_snp_reset(), and efi_snp_device::snp.

Referenced by efi_undi_issue().

efi_undi_shutdown()

static EFI_STATUS efi_undi_shutdown ( struct efi_snp_device *  snpdev )

static

Shutdown.

Parameters

snpdev	SNP device
efirc	EFI status code

Definition at line 1118 of file efi_snp.c.

                                                                      {
        EFI_STATUS efirc;

        DBGC ( snpdev, "UNDI %p SHUTDOWN\n", snpdev );

        /* Reset SNP device */
        if ( ( efirc = efi_snp_shutdown ( &snpdev->snp ) ) != 0 )
                return efirc;

        return 0;
}

References DBGC, efi_snp_shutdown(), and efi_snp_device::snp.

Referenced by efi_undi_issue().

efi_undi_receive_filters()

static EFI_STATUS efi_undi_receive_filters ( struct efi_snp_device *  snpdev, PXE_CDB *  cdb  )

static

Get/set receive filters.

Parameters

snpdev	SNP device
cdb	Command description block
efirc	EFI status code

Definition at line 1137 of file efi_snp.c.

                                                            {

        DBGC ( snpdev, "UNDI %p RECEIVE FILTERS\n", snpdev );

        /* Mark everything as supported */
        cdb->StatFlags |= ( PXE_STATFLAGS_RECEIVE_FILTER_UNICAST |
                            PXE_STATFLAGS_RECEIVE_FILTER_BROADCAST |
                            PXE_STATFLAGS_RECEIVE_FILTER_PROMISCUOUS |
                            PXE_STATFLAGS_RECEIVE_FILTER_ALL_MULTICAST );

        return 0;
}

References DBGC, PXE_STATFLAGS_RECEIVE_FILTER_ALL_MULTICAST, PXE_STATFLAGS_RECEIVE_FILTER_BROADCAST, PXE_STATFLAGS_RECEIVE_FILTER_PROMISCUOUS, PXE_STATFLAGS_RECEIVE_FILTER_UNICAST, and s_pxe_cdb::StatFlags.

Referenced by efi_undi_issue().

efi_undi_station_address()

static EFI_STATUS efi_undi_station_address ( struct efi_snp_device *  snpdev, PXE_CDB *  cdb, PXE_CPB_STATION_ADDRESS *  cpb, PXE_DB_STATION_ADDRESS *  db  )

static

Get/set station address.

Parameters

snpdev	SNP device
cdb	Command description block
cpb	Command parameter block
efirc	EFI status code

Definition at line 1159 of file efi_snp.c.

                                                                          {
        struct net_device *netdev = snpdev->netdev;
        struct ll_protocol *ll_protocol = netdev->ll_protocol;
        void *mac;
        int reset;
        EFI_STATUS efirc;

        DBGC ( snpdev, "UNDI %p STATION ADDRESS\n", snpdev );

        /* Update address if applicable */
        reset = ( cdb->OpFlags & PXE_OPFLAGS_STATION_ADDRESS_RESET );
        mac = ( cpb ? &cpb->StationAddr : NULL );
        if ( ( reset || mac ) &&
             ( ( efirc = efi_snp_station_address ( &snpdev->snp, reset,
                                                   mac ) ) != 0 ) )
                return efirc;

        /* Fill in current addresses, if applicable */
        if ( db ) {
                memset ( db, 0, sizeof ( *db ) );
                memcpy ( &db->StationAddr, netdev->ll_addr,
                         ll_protocol->ll_addr_len );
                memcpy ( &db->BroadcastAddr, netdev->ll_broadcast,
                         ll_protocol->ll_addr_len );
                memcpy ( &db->PermanentAddr, netdev->hw_addr,
                         ll_protocol->hw_addr_len );
        }

        return 0;
}

References db, DBGC, efi_snp_station_address(), net_device::hw_addr, ll_protocol::hw_addr_len, net_device::ll_addr, ll_protocol::ll_addr_len, net_device::ll_broadcast, net_device::ll_protocol, mac, memcpy(), memset(), efi_snp_device::netdev, netdev, NULL, s_pxe_cdb::OpFlags, PXE_OPFLAGS_STATION_ADDRESS_RESET, efi_snp_device::snp, and s_pxe_cpb_station_address::StationAddr.

Referenced by efi_undi_issue().

efi_undi_get_status()

static EFI_STATUS efi_undi_get_status ( struct efi_snp_device *  snpdev, PXE_CDB *  cdb, PXE_DB_GET_STATUS *  db  )

static

Get interrupt status.

Parameters

snpdev	SNP device
cdb	Command description block
db	Data block
efirc	EFI status code

Definition at line 1201 of file efi_snp.c.

                                                                              {
        UINT32 interrupts;
        VOID *txbuf;
        struct io_buffer *rxbuf;
        EFI_STATUS efirc;

        DBGC2 ( snpdev, "UNDI %p GET STATUS\n", snpdev );

        /* Get status */
        if ( ( efirc = efi_snp_get_status ( &snpdev->snp, &interrupts,
                                            &txbuf ) ) != 0 )
                return efirc;

        /* Report status */
        memset ( db, 0, sizeof ( *db ) );
        if ( interrupts & EFI_SIMPLE_NETWORK_RECEIVE_INTERRUPT )
                cdb->StatFlags |= PXE_STATFLAGS_GET_STATUS_RECEIVE;
        if ( interrupts & EFI_SIMPLE_NETWORK_TRANSMIT_INTERRUPT )
                cdb->StatFlags |= PXE_STATFLAGS_GET_STATUS_TRANSMIT;
        if ( txbuf ) {
                db->TxBuffer[0] = ( ( intptr_t ) txbuf );
        } else {
                cdb->StatFlags |= PXE_STATFLAGS_GET_STATUS_NO_TXBUFS_WRITTEN;
                /* The specification states clearly that UNDI drivers
                 * should set TXBUF_QUEUE_EMPTY if all completed
                 * buffer addresses are written into the returned data
                 * block.  However, SnpDxe chooses to interpret
                 * TXBUF_QUEUE_EMPTY as a synonym for
                 * NO_TXBUFS_WRITTEN, thereby rendering it entirely
                 * pointless.  Work around this UEFI stupidity, as per
                 * usual.
                 */
                if ( snpdev->tx_prod == snpdev->tx_cons )
                        cdb->StatFlags |=
                                PXE_STATFLAGS_GET_STATUS_TXBUF_QUEUE_EMPTY;
        }
        rxbuf = list_first_entry ( &snpdev->rx, struct io_buffer, list );
        if ( rxbuf )
                db->RxFrameLen = iob_len ( rxbuf );
        if ( ! netdev_link_ok ( snpdev->netdev ) )
                cdb->StatFlags |= PXE_STATFLAGS_GET_STATUS_NO_MEDIA;

        return 0;
}

References db, DBGC2, EFI_SIMPLE_NETWORK_RECEIVE_INTERRUPT, EFI_SIMPLE_NETWORK_TRANSMIT_INTERRUPT, efi_snp_get_status(), iob_len(), io_buffer::list, list_first_entry, memset(), efi_snp_device::netdev, netdev_link_ok(), PXE_STATFLAGS_GET_STATUS_NO_MEDIA, PXE_STATFLAGS_GET_STATUS_NO_TXBUFS_WRITTEN, PXE_STATFLAGS_GET_STATUS_RECEIVE, PXE_STATFLAGS_GET_STATUS_TRANSMIT, PXE_STATFLAGS_GET_STATUS_TXBUF_QUEUE_EMPTY, efi_snp_device::rx, efi_snp_device::snp, s_pxe_cdb::StatFlags, efi_snp_device::tx_cons, efi_snp_device::tx_prod, and VOID.

Referenced by efi_undi_issue().

efi_undi_fill_header()

static EFI_STATUS efi_undi_fill_header ( struct efi_snp_device *  snpdev, PXE_CDB *  cdb, PXE_CPB_ANY *  cpb  )

static

Fill header.

Parameters

snpdev	SNP device
cdb	Command description block
cpb	Command parameter block
efirc	EFI status code

Definition at line 1255 of file efi_snp.c.

                                                                          {
        struct net_device *netdev = snpdev->netdev;
        struct ll_protocol *ll_protocol = netdev->ll_protocol;
        PXE_CPB_FILL_HEADER *whole = &cpb->fill_header;
        PXE_CPB_FILL_HEADER_FRAGMENTED *fragged = &cpb->fill_header_fragmented;
        VOID *data;
        void *dest;
        void *src;
        uint16_t proto;
        struct io_buffer iobuf;
        int rc;

        /* SnpDxe will (pointlessly) use PXE_CPB_FILL_HEADER_FRAGMENTED
         * even though we choose to explicitly not claim support for
         * fragments via PXE_ROMID_IMP_FRAG_SUPPORTED.
         */
        if ( cdb->OpFlags & PXE_OPFLAGS_FILL_HEADER_FRAGMENTED ) {
                data = ( ( void * ) ( intptr_t ) fragged->FragDesc[0].FragAddr);
                dest = &fragged->DestAddr;
                src = &fragged->SrcAddr;
                proto = fragged->Protocol;
        } else {
                data = ( ( void * ) ( intptr_t ) whole->MediaHeader );
                dest = &whole->DestAddr;
                src = &whole->SrcAddr;
                proto = whole->Protocol;
        }

        /* Construct link-layer header */
        iob_populate ( &iobuf, data, 0, ll_protocol->ll_header_len );
        iob_reserve ( &iobuf, ll_protocol->ll_header_len );
        if ( ( rc = ll_protocol->push ( netdev, &iobuf, dest, src,
                                        proto ) ) != 0 )
                return EFIRC ( rc );

        return 0;
}

References data, dest, s_pxe_cpb_fill_header::DestAddr, s_pxe_cpb_fill_header_fragmented::DestAddr, EFIRC, PXE_CPB_ANY::fill_header, PXE_CPB_ANY::fill_header_fragmented, s_pxe_cpb_fill_header_fragmented::FragAddr, s_pxe_cpb_fill_header_fragmented::FragDesc, iob_populate(), iob_reserve, ll_protocol::ll_header_len, net_device::ll_protocol, s_pxe_cpb_fill_header::MediaHeader, efi_snp_device::netdev, netdev, s_pxe_cdb::OpFlags, s_pxe_cpb_fill_header::Protocol, s_pxe_cpb_fill_header_fragmented::Protocol, ll_protocol::push, PXE_OPFLAGS_FILL_HEADER_FRAGMENTED, rc, src, s_pxe_cpb_fill_header::SrcAddr, s_pxe_cpb_fill_header_fragmented::SrcAddr, and VOID.

Referenced by efi_undi_issue().

efi_undi_transmit()

static EFI_STATUS efi_undi_transmit ( struct efi_snp_device *  snpdev, PXE_CPB_TRANSMIT *  cpb  )

static

Transmit.

Parameters

snpdev	SNP device
cpb	Command parameter block
efirc	EFI status code

Definition at line 1301 of file efi_snp.c.

                                                              {
        VOID *data = ( ( void * ) ( intptr_t ) cpb->FrameAddr );
        EFI_STATUS efirc;

        DBGC2 ( snpdev, "UNDI %p TRANSMIT\n", snpdev );

        /* Transmit packet */
        if ( ( efirc = efi_snp_transmit ( &snpdev->snp, 0, cpb->DataLen,
                                          data, NULL, NULL, NULL ) ) != 0 )
                return efirc;

        return 0;
}

References data, s_pxe_cpb_transmit::DataLen, DBGC2, efi_snp_transmit(), s_pxe_cpb_transmit::FrameAddr, NULL, efi_snp_device::snp, and VOID.

Referenced by efi_undi_issue().

efi_undi_receive()

static EFI_STATUS efi_undi_receive ( struct efi_snp_device *  snpdev, PXE_CPB_RECEIVE *  cpb, PXE_DB_RECEIVE *  db  )

static

Receive.

Parameters

snpdev	SNP device
cpb	Command parameter block
efirc	EFI status code

Definition at line 1323 of file efi_snp.c.

                                                          {
        struct net_device *netdev = snpdev->netdev;
        struct ll_protocol *ll_protocol = netdev->ll_protocol;
        VOID *data = ( ( void * ) ( intptr_t ) cpb->BufferAddr );
        UINTN hdr_len;
        UINTN len = cpb->BufferLen;
        EFI_MAC_ADDRESS src;
        EFI_MAC_ADDRESS dest;
        UINT16 proto;
        EFI_STATUS efirc;

        DBGC2 ( snpdev, "UNDI %p RECEIVE\n", snpdev );

        /* Receive packet */
        if ( ( efirc = efi_snp_receive ( &snpdev->snp, &hdr_len, &len, data,
                                         &src, &dest, &proto ) ) != 0 )
                return efirc;

        /* Describe frame */
        memset ( db, 0, sizeof ( *db ) );
        memcpy ( &db->SrcAddr, &src, ll_protocol->ll_addr_len );
        memcpy ( &db->DestAddr, &dest, ll_protocol->ll_addr_len );
        db->FrameLen = len;
        db->Protocol = proto;
        db->MediaHeaderLen = ll_protocol->ll_header_len;
        db->Type = PXE_FRAME_TYPE_PROMISCUOUS;

        return 0;
}

References s_pxe_cpb_receive::BufferAddr, s_pxe_cpb_receive::BufferLen, data, db, DBGC2, dest, efi_snp_receive(), len, ll_protocol::ll_addr_len, ll_protocol::ll_header_len, net_device::ll_protocol, memcpy(), memset(), efi_snp_device::netdev, netdev, PXE_FRAME_TYPE_PROMISCUOUS, efi_snp_device::snp, src, and VOID.

Referenced by efi_undi_issue().

efi_undi_issue()

static EFIAPI VOID efi_undi_issue ( UINT64  cdb_phys )

static

UNDI entry point.

Definition at line 1356 of file efi_snp.c.

                                                      {
        PXE_CDB *cdb = ( ( void * ) ( intptr_t ) cdb_phys );
        PXE_CPB_ANY *cpb = ( ( void * ) ( intptr_t ) cdb->CPBaddr );
        PXE_DB_ANY *db = ( ( void * ) ( intptr_t ) cdb->DBaddr );
        struct efi_snp_device *snpdev;
        EFI_STATUS efirc;

        /* Identify device */
        snpdev = efi_undi_snpdev ( cdb->IFnum );
        if ( ! snpdev ) {
                DBGC ( cdb, "UNDI invalid interface number %d\n", cdb->IFnum );
                cdb->StatCode = PXE_STATCODE_INVALID_CDB;
                cdb->StatFlags = PXE_STATFLAGS_COMMAND_FAILED;
                return;
        }

        /* Fail if net device is currently claimed for use by iPXE */
        if ( efi_snp_claimed ) {
                cdb->StatCode = PXE_STATCODE_BUSY;
                cdb->StatFlags = PXE_STATFLAGS_COMMAND_FAILED;
                return;
        }

        /* Handle opcode */
        cdb->StatCode = PXE_STATCODE_SUCCESS;
        cdb->StatFlags = PXE_STATFLAGS_COMMAND_COMPLETE;
        switch ( cdb->OpCode ) {

        case PXE_OPCODE_GET_STATE:
                efirc = efi_undi_get_state ( snpdev, cdb );
                break;

        case PXE_OPCODE_START:
                efirc = efi_undi_start ( snpdev );
                break;

        case PXE_OPCODE_STOP:
                efirc = efi_undi_stop ( snpdev );
                break;

        case PXE_OPCODE_GET_INIT_INFO:
                efirc = efi_undi_get_init_info ( snpdev, cdb,
                                                 &db->get_init_info );
                break;

        case PXE_OPCODE_INITIALIZE:
                efirc = efi_undi_initialize ( snpdev, cdb );
                break;

        case PXE_OPCODE_RESET:
                efirc = efi_undi_reset ( snpdev );
                break;

        case PXE_OPCODE_SHUTDOWN:
                efirc = efi_undi_shutdown ( snpdev );
                break;

        case PXE_OPCODE_RECEIVE_FILTERS:
                efirc = efi_undi_receive_filters ( snpdev, cdb );
                break;

        case PXE_OPCODE_STATION_ADDRESS:
                efirc = efi_undi_station_address ( snpdev, cdb,
                                                   &cpb->station_address,
                                                   &db->station_address );
                break;

        case PXE_OPCODE_GET_STATUS:
                efirc = efi_undi_get_status ( snpdev, cdb, &db->get_status );
                break;

        case PXE_OPCODE_FILL_HEADER:
                efirc = efi_undi_fill_header ( snpdev, cdb, cpb );
                break;

        case PXE_OPCODE_TRANSMIT:
                efirc = efi_undi_transmit ( snpdev, &cpb->transmit );
                break;

        case PXE_OPCODE_RECEIVE:
                efirc = efi_undi_receive ( snpdev, &cpb->receive,
                                           &db->receive );
                break;

        default:
                DBGC ( snpdev, "UNDI %p unsupported opcode %#04x\n",
                       snpdev, cdb->OpCode );
                efirc = EFI_UNSUPPORTED;
                break;
        }

        /* Convert EFI status code to UNDI status code */
        if ( efirc != 0 ) {
                cdb->StatFlags &= ~PXE_STATFLAGS_STATUS_MASK;
                cdb->StatFlags |= PXE_STATFLAGS_COMMAND_FAILED;
                cdb->StatCode = efi_undi_statcode ( efirc );
        }
}

References s_pxe_cdb::CPBaddr, db, s_pxe_cdb::DBaddr, DBGC, efi_snp_claimed, efi_undi_fill_header(), efi_undi_get_init_info(), efi_undi_get_state(), efi_undi_get_status(), efi_undi_initialize(), efi_undi_receive(), efi_undi_receive_filters(), efi_undi_reset(), efi_undi_shutdown(), efi_undi_snpdev(), efi_undi_start(), efi_undi_statcode(), efi_undi_station_address(), efi_undi_stop(), efi_undi_transmit(), EFI_UNSUPPORTED, s_pxe_cdb::IFnum, s_pxe_cdb::OpCode, PXE_OPCODE_FILL_HEADER, PXE_OPCODE_GET_INIT_INFO, PXE_OPCODE_GET_STATE, PXE_OPCODE_GET_STATUS, PXE_OPCODE_INITIALIZE, PXE_OPCODE_RECEIVE, PXE_OPCODE_RECEIVE_FILTERS, PXE_OPCODE_RESET, PXE_OPCODE_SHUTDOWN, PXE_OPCODE_START, PXE_OPCODE_STATION_ADDRESS, PXE_OPCODE_STOP, PXE_OPCODE_TRANSMIT, PXE_STATCODE_BUSY, PXE_STATCODE_INVALID_CDB, PXE_STATCODE_SUCCESS, PXE_STATFLAGS_COMMAND_COMPLETE, PXE_STATFLAGS_COMMAND_FAILED, PXE_STATFLAGS_STATUS_MASK, PXE_CPB_ANY::receive, s_pxe_cdb::StatCode, s_pxe_cdb::StatFlags, PXE_CPB_ANY::station_address, and PXE_CPB_ANY::transmit.

Referenced by efi_snp_probe().

efi_vlan_set()

static EFI_STATUS EFIAPI efi_vlan_set ( EFI_VLAN_CONFIG_PROTOCOL *  vcfg, UINT16  tag, UINT8  priority  )

static

Create or modify VLAN device.

Parameters

vcfg	VLAN configuration protocol
tag	VLAN tag
priority	Default VLAN priority

Return values

efirc

EFI status code

Definition at line 1507 of file efi_snp.c.

                                                                     {
        struct efi_snp_device *snpdev =
                container_of ( vcfg, struct efi_snp_device, vcfg );
        struct net_device *trunk = snpdev->netdev;
        struct efi_saved_tpl tpl;
        int rc;

        /* Raise TPL */
        efi_raise_tpl ( &tpl );

        /* Create or modify VLAN device */
        if ( ( rc = vlan_create ( trunk, tag, priority ) ) != 0 ) {
                DBGC ( snpdev, "SNPDEV %p could not create VLAN tag %d: %s\n",
                       snpdev, tag, strerror ( rc ) );
                goto err_create;
        }
        DBGC ( snpdev, "SNPDEV %p created VLAN tag %d priority %d\n",
               snpdev, tag, priority );

 err_create:
        efi_restore_tpl ( &tpl );
        return EFIRC ( rc );
}

References container_of, DBGC, efi_raise_tpl(), efi_restore_tpl(), EFIRC, efi_snp_device::netdev, priority, rc, strerror(), tag, efi_snp_device::vcfg, and vlan_create().

efi_vlan_find()

static EFI_STATUS EFIAPI efi_vlan_find ( EFI_VLAN_CONFIG_PROTOCOL *  vcfg, UINT16 *  filter, UINT16 *  count, EFI_VLAN_FIND_DATA **  entries  )

static

Find VLAN device(s)

Parameters

vcfg	VLAN configuration protocol
filter	VLAN tag, or NULL to find all VLANs
count	Number of VLANs
entries	List of VLANs

Return values

efirc

EFI status code

Definition at line 1541 of file efi_snp.c.

                                                                        {
        EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
        struct efi_snp_device *snpdev =
                container_of ( vcfg, struct efi_snp_device, vcfg );
        struct net_device *trunk = snpdev->netdev;
        struct net_device *vlan;
        struct efi_saved_tpl tpl;
        EFI_VLAN_FIND_DATA *entry;
        VOID *buffer;
        unsigned int tag;
        unsigned int tci;
        size_t len;
        EFI_STATUS efirc;
        int rc;

        /* Raise TPL */
        efi_raise_tpl ( &tpl );

        /* Count number of matching VLANs */
        *count = 0;
        for ( tag = 1 ; VLAN_TAG_IS_VALID ( tag ) ; tag++ ) {
                if ( filter && ( tag != *filter ) )
                        continue;
                if ( ! ( vlan = vlan_find ( trunk, tag ) ) )
                        continue;
                (*count)++;
        }

        /* Allocate buffer to hold results */
        len = ( (*count) * sizeof ( *entry ) );
        if ( ( efirc = bs->AllocatePool ( EfiBootServicesData, len,
                                          &buffer ) ) != 0 ) {
                rc = -EEFI ( efirc );
                goto err_alloc;
        }

        /* Fill in buffer */
        *entries = buffer;
        entry = *entries;
        for ( tag = 1 ; VLAN_TAG_IS_VALID ( tag ) ; tag++ ) {
                if ( filter && ( tag != *filter ) )
                        continue;
                if ( ! ( vlan = vlan_find ( trunk, tag ) ) )
                        continue;
                tci = vlan_tci ( vlan );
                entry->VlanId = VLAN_TAG ( tci );
                entry->Priority = VLAN_PRIORITY ( tci );
                assert ( entry->VlanId == tag );
                entry++;
        }
        assert ( entry == &(*entries)[*count] );

        /* Success */
        rc = 0;

 err_alloc:
        efi_restore_tpl ( &tpl );
        return EFIRC ( rc );
}

References EFI_BOOT_SERVICES::AllocatePool, assert(), EFI_SYSTEM_TABLE::BootServices, buffer, container_of, count, EEFI, efi_raise_tpl(), efi_restore_tpl(), efi_systab, EfiBootServicesData, EFIRC, filter, len, efi_snp_device::netdev, rc, tag, efi_snp_device::vcfg, vlan_find(), VLAN_PRIORITY, VLAN_TAG, VLAN_TAG_IS_VALID, vlan_tci(), and VOID.

efi_vlan_remove()

static EFI_STATUS EFIAPI efi_vlan_remove ( EFI_VLAN_CONFIG_PROTOCOL *  vcfg, UINT16  tag  )

static

Remove VLAN device.

Parameters

vcfg	VLAN configuration protocol
tag	VLAN tag

Return values

efirc

EFI status code

Definition at line 1610 of file efi_snp.c.

                                                        {
        struct efi_snp_device *snpdev =
                container_of ( vcfg, struct efi_snp_device, vcfg );
        struct net_device *trunk = snpdev->netdev;
        struct net_device *vlan;
        struct efi_saved_tpl tpl;
        int rc;

        /* Raise TPL */
        efi_raise_tpl ( &tpl );

        /* Identify VLAN device */
        vlan = vlan_find ( trunk, tag );
        if ( ! vlan ) {
                DBGC ( snpdev, "SNPDEV %p could not find VLAN tag %d\n",
                       snpdev, tag );
                rc = -ENOENT;
                goto err_find;
        }

        /* Remove VLAN device */
        vlan_destroy ( vlan );
        DBGC ( snpdev, "SNPDEV %p removed VLAN tag %d\n", snpdev, tag );

        /* Success */
        rc = 0;

 err_find:
        efi_restore_tpl ( &tpl );
        return EFIRC ( rc );
}

References container_of, DBGC, efi_raise_tpl(), efi_restore_tpl(), EFIRC, ENOENT, efi_snp_device::netdev, rc, tag, efi_snp_device::vcfg, vlan_destroy(), and vlan_find().

efi_snp_get_driver_name()

static EFI_STATUS EFIAPI efi_snp_get_driver_name ( EFI_COMPONENT_NAME2_PROTOCOL *  name2, CHAR8 *language  __unused, CHAR16 **  driver_name  )

static

Look up driver name.

Parameters

name2	Component name protocol
language	Language to use
driver_name	Driver name to fill in

Return values

efirc

EFI status code

Definition at line 1666 of file efi_snp.c.

                                                                           {
        struct efi_snp_device *snpdev =
                container_of ( name2, struct efi_snp_device, name2 );

        *driver_name = snpdev->driver_name;
        return 0;
}

References container_of, efi_snp_device::driver_name, and efi_snp_device::name2.

Referenced by efi_snp_probe().

efi_snp_get_controller_name()

static EFI_STATUS EFIAPI efi_snp_get_controller_name ( EFI_COMPONENT_NAME2_PROTOCOL *  name2, EFI_HANDLE device  __unused, EFI_HANDLE child  __unused, CHAR8 *language  __unused, CHAR16 **  controller_name  )

static

Look up controller name.

Parameters

name2	Component name protocol
device	Device
child	Child device, or NULL
language	Language to use
driver_name	Device name to fill in

Return values

efirc

EFI status code

Definition at line 1686 of file efi_snp.c.

                                                         {
        struct efi_snp_device *snpdev =
                container_of ( name2, struct efi_snp_device, name2 );

        *controller_name = snpdev->controller_name;
        return 0;
}

References container_of, efi_snp_device::controller_name, and efi_snp_device::name2.

Referenced by efi_snp_probe().

efi_snp_load_file()

static EFI_STATUS EFIAPI efi_snp_load_file ( EFI_LOAD_FILE_PROTOCOL *  load_file, EFI_DEVICE_PATH_PROTOCOL *path  __unused, BOOLEAN  booting, UINTN *len  __unused, VOID *data  __unused  )

static

Load file.

Parameters

loadfile	Load file protocol
path	File path
booting	Loading as part of a boot attempt

Return values

efirc

EFI status code

Definition at line 1714 of file efi_snp.c.

                                          {
        struct efi_snp_device *snpdev =
                container_of ( load_file, struct efi_snp_device, load_file );
        struct net_device *netdev = snpdev->netdev;
        int rc;

        /* Fail unless this is a boot attempt */
        if ( ! booting ) {
                DBGC ( snpdev, "SNPDEV %p cannot load non-boot file\n",
                       snpdev );
                return EFI_UNSUPPORTED;
        }

        /* Claim network devices for use by iPXE */
        efi_snp_claim();

        /* Start watchdog holdoff timer */
        efi_watchdog_start();

        /* Boot from network device */
        if ( ( rc = ipxe ( netdev ) ) != 0 )
                goto err_ipxe;

        /* Reset console */
        console_reset();

 err_ipxe:
        efi_watchdog_stop();
        efi_snp_release();
        return EFIRC ( rc );
}

References console_reset(), container_of, DBGC, efi_snp_claim(), efi_snp_release(), EFI_UNSUPPORTED, efi_watchdog_start(), efi_watchdog_stop(), EFIRC, ipxe(), efi_snp_device::load_file, efi_snp_device::netdev, netdev, and rc.

efi_snp_demux()

static struct efi_snp_device* efi_snp_demux ( struct net_device *  netdev )

static

Locate SNP device corresponding to network device.

Parameters

netdev

Network device

Return values

snp	SNP device, or NULL if not found

Definition at line 1767 of file efi_snp.c.

                                                                           {
        struct efi_snp_device *snpdev;

        list_for_each_entry ( snpdev, &efi_snp_devices, list ) {
                if ( snpdev->netdev == netdev )
                        return snpdev;
        }
        return NULL;
}

References efi_snp_device::list, list_for_each_entry, efi_snp_device::netdev, netdev, and NULL.

Referenced by efi_snp_notify(), efi_snp_remove(), and last_opened_snpdev().

efi_snp_probe()

static int efi_snp_probe ( struct net_device *  netdev, void *priv  __unused  )

static

Create SNP device.

Parameters

netdev	Network device
priv	Private data

Return values

rc	Return status code

Definition at line 1784 of file efi_snp.c.

                                                                            {
        EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
        struct efi_device *efidev;
        struct efi_snp_device *snpdev;
        unsigned int ifcnt;
        void *interface;
        unsigned int tci;
        char vlan_name[ 12 /* ", VLAN xxxx" + NUL */ ];
        int leak = 0;
        EFI_STATUS efirc;
        int rc;

        /* Allocate the SNP device */
        snpdev = zalloc ( sizeof ( *snpdev ) );
        if ( ! snpdev ) {
                rc = -ENOMEM;
                goto err_alloc_snp;
        }
        snpdev->netdev = netdev_get ( netdev );
        INIT_LIST_HEAD ( &snpdev->rx );

        /* Find parent EFI device, if any */
        efidev = efidev_parent ( netdev->dev );
        if ( efidev )
                snpdev->parent = efidev->device;

        /* Sanity check */
        if ( netdev->ll_protocol->ll_addr_len > sizeof ( EFI_MAC_ADDRESS ) ) {
                DBGC ( snpdev, "SNPDEV %p cannot support link-layer address "
                       "length %d for %s\n", snpdev,
                       netdev->ll_protocol->ll_addr_len, netdev->name );
                rc = -ENOTSUP;
                goto err_ll_addr_len;
        }

        /* Populate the SNP structure */
        memcpy ( &snpdev->snp, &efi_snp_device_snp, sizeof ( snpdev->snp ) );
        snpdev->snp.Mode = &snpdev->mode;
        if ( ( efirc = bs->CreateEvent ( EVT_NOTIFY_WAIT, TPL_NOTIFY,
                                         efi_snp_wait_for_packet, snpdev,
                                         &snpdev->snp.WaitForPacket ) ) != 0 ){
                rc = -EEFI ( efirc );
                DBGC ( snpdev, "SNPDEV %p could not create event: %s\n",
                       snpdev, strerror ( rc ) );
                goto err_create_event;
        }

        /* Populate the SNP mode structure */
        snpdev->mode.State = EfiSimpleNetworkStopped;
        efi_snp_set_mode ( snpdev );

        /* Populate the NII structure */
        memcpy ( &snpdev->nii, &efi_snp_device_nii, sizeof ( snpdev->nii ) );
        snpdev->nii.Id = ( ( intptr_t ) &efi_snp_undi );
        snpdev->nii.IfNum = efi_undi_ifnum ( snpdev );
        efi_snp_undi.EntryPoint = ( ( intptr_t ) efi_undi_issue );
        ifcnt = ( ( efi_snp_undi.IFcntExt << 8 ) | efi_snp_undi.IFcnt );
        if ( ifcnt < snpdev->nii.IfNum )
                ifcnt = snpdev->nii.IfNum;
        efi_snp_undi.IFcnt = ( ifcnt & 0xff );
        efi_snp_undi.IFcntExt = ( ifcnt >> 8 );
        efi_snp_undi.Fudge -= efi_undi_checksum ( &efi_snp_undi,
                                                  sizeof ( efi_snp_undi ) );

        /* Populate the VLAN configuration protocol */
        memcpy ( &snpdev->vcfg, &efi_vlan, sizeof ( snpdev->vcfg ) );

        /* Populate the component name structure */
        efi_snprintf ( snpdev->driver_name,
                       ( sizeof ( snpdev->driver_name ) /
                         sizeof ( snpdev->driver_name[0] ) ),
                       "%s %s", product_short_name, netdev->dev->driver_name );
        tci = vlan_tci ( netdev );
        if ( tci ) {
                snprintf ( vlan_name, sizeof ( vlan_name ), ", VLAN %d",
                           VLAN_TAG ( tci ) );
        } else {
                vlan_name[0] = '\0';
        }
        efi_snprintf ( snpdev->controller_name,
                       ( sizeof ( snpdev->controller_name ) /
                         sizeof ( snpdev->controller_name[0] ) ),
                       "%s %s (%s, %s%s)", product_short_name,
                       netdev->dev->driver_name, netdev->dev->name,
                       netdev_addr ( netdev ), vlan_name );
        snpdev->name2.GetDriverName = efi_snp_get_driver_name;
        snpdev->name2.GetControllerName = efi_snp_get_controller_name;
        snpdev->name2.SupportedLanguages = "en";

        /* Populate the load file protocol structure */
        memcpy ( &snpdev->load_file, &efi_snp_load_file_protocol,
                 sizeof ( snpdev->load_file ) );

        /* Populate the device name */
        efi_snprintf ( snpdev->name, ( sizeof ( snpdev->name ) /
                                       sizeof ( snpdev->name[0] ) ),
                       "%s", netdev->name );

        /* Construct device path */
        snpdev->path = efi_netdev_path ( netdev );
        if ( ! snpdev->path ) {
                rc = -ENOMEM;
                goto err_path;
        }

        /* Install the SNP */
        if ( ( efirc = bs->InstallMultipleProtocolInterfaces (
                        &snpdev->handle,
                        &efi_simple_network_protocol_guid, &snpdev->snp,
                        &efi_device_path_protocol_guid, snpdev->path,
                        &efi_nii_protocol_guid, &snpdev->nii,
                        &efi_nii31_protocol_guid, &snpdev->nii,
                        &efi_vlan_config_protocol_guid, &snpdev->vcfg,
                        &efi_component_name2_protocol_guid, &snpdev->name2,
                        &efi_load_file_protocol_guid, &snpdev->load_file,
                        NULL ) ) != 0 ) {
                rc = -EEFI ( efirc );
                DBGC ( snpdev, "SNPDEV %p could not install protocols: %s\n",
                       snpdev, strerror ( rc ) );
                goto err_install_protocol_interface;
        }

        /* SnpDxe will repeatedly start up and shut down our NII/UNDI
         * interface (in order to obtain the MAC address) before
         * discovering that it cannot install another SNP on the same
         * handle.  This causes the underlying network device to be
         * unexpectedly closed.
         *
         * Prevent this by opening our own NII (and NII31) protocol
         * instances to prevent SnpDxe from attempting to bind to
         * them.
         */
        if ( ( rc = efi_open_by_driver ( snpdev->handle,
                                         &efi_nii_protocol_guid,
                                         &interface ) ) != 0 ) {
                DBGC ( snpdev, "SNPDEV %p could not open NII protocol: %s\n",
                       snpdev, strerror ( rc ) );
                goto err_open_nii;
        }
        if ( ( rc = efi_open_by_driver ( snpdev->handle,
                                         &efi_nii31_protocol_guid,
                                         &interface ) ) != 0 ) {
                DBGC ( snpdev, "SNPDEV %p could not open NII31 protocol: %s\n",
                       snpdev, strerror ( rc ) );
                goto err_open_nii31;
        }

        /* Add as child of EFI parent device, if applicable */
        if ( snpdev->parent &&
             ( ( rc = efi_child_add ( snpdev->parent,
                                      snpdev->handle ) ) != 0 ) ) {
                DBGC ( snpdev, "SNPDEV %p could not become child of %s: %s\n",
                       snpdev, efi_handle_name ( efidev->device ),
                       strerror ( rc ) );
                goto err_efi_child_add;
        }

        /* Install HII */
        if ( ( rc = efi_snp_hii_install ( snpdev ) ) != 0 ) {
                DBGC ( snpdev, "SNPDEV %p could not install HII: %s\n",
                       snpdev, strerror ( rc ) );
                /* HII fails on several platforms.  It's
                 * non-essential, so treat this as a non-fatal
                 * error.
                 */
        }

        /* Add to list of SNP devices */
        list_add ( &snpdev->list, &efi_snp_devices );

        DBGC ( snpdev, "SNPDEV %p installed for %s as device %s\n",
               snpdev, netdev->name, efi_handle_name ( snpdev->handle ) );
        return 0;

        list_del ( &snpdev->list );
        if ( snpdev->package_list )
                leak |= efi_snp_hii_uninstall ( snpdev );
        if ( snpdev->parent )
                efi_child_del ( snpdev->parent, snpdev->handle );
 err_efi_child_add:
        efi_close_by_driver ( snpdev->handle, &efi_nii31_protocol_guid );
 err_open_nii31:
        efi_close_by_driver ( snpdev->handle, &efi_nii_protocol_guid );
 err_open_nii:
        if ( ( efirc = bs->UninstallMultipleProtocolInterfaces (
                        snpdev->handle,
                        &efi_simple_network_protocol_guid, &snpdev->snp,
                        &efi_device_path_protocol_guid, snpdev->path,
                        &efi_nii_protocol_guid, &snpdev->nii,
                        &efi_nii31_protocol_guid, &snpdev->nii,
                        &efi_vlan_config_protocol_guid, &snpdev->vcfg,
                        &efi_component_name2_protocol_guid, &snpdev->name2,
                        &efi_load_file_protocol_guid, &snpdev->load_file,
                        NULL ) ) != 0 ) {
                DBGC ( snpdev, "SNPDEV %p could not uninstall: %s\n",
                       snpdev, strerror ( -EEFI ( efirc ) ) );
                leak = 1;
        }
        efi_nullify_snp ( &snpdev->snp );
        efi_nullify_nii ( &snpdev->nii );
        efi_nullify_vlan ( &snpdev->vcfg );
        efi_nullify_name2 ( &snpdev->name2 );
        efi_nullify_load_file ( &snpdev->load_file );
 err_install_protocol_interface:
        if ( ! leak )
                free ( snpdev->path );
 err_path:
        bs->CloseEvent ( snpdev->snp.WaitForPacket );
 err_create_event:
 err_ll_addr_len:
        if ( ! leak ) {
                netdev_put ( netdev );
                free ( snpdev );
        }
 err_alloc_snp:
        if ( leak )
                DBGC ( snpdev, "SNPDEV %p nullified and leaked\n", snpdev );
        return rc;
}

References EFI_SYSTEM_TABLE::BootServices, EFI_BOOT_SERVICES::CloseEvent, efi_snp_device::controller_name, EFI_BOOT_SERVICES::CreateEvent, DBGC, net_device::dev, efi_device::device, efi_snp_device::driver_name, device::driver_name, EEFI, efi_child_add(), efi_child_del(), efi_close_by_driver(), efi_component_name2_protocol_guid, efi_device_path_protocol_guid, efi_handle_name(), efi_load_file_protocol_guid, efi_netdev_path(), efi_nii31_protocol_guid, efi_nii_protocol_guid, efi_nullify_load_file(), efi_nullify_name2(), efi_nullify_nii(), efi_nullify_snp(), efi_nullify_vlan(), efi_open_by_driver, efi_simple_network_protocol_guid, efi_snp_device_nii, efi_snp_device_snp, efi_snp_get_controller_name(), efi_snp_get_driver_name(), efi_snp_hii_install(), efi_snp_hii_uninstall(), efi_snp_load_file_protocol, efi_snp_set_mode(), efi_snp_undi, efi_snp_wait_for_packet(), efi_snprintf(), efi_systab, efi_undi_checksum(), efi_undi_ifnum(), efi_undi_issue(), efi_vlan, efi_vlan_config_protocol_guid, efidev_parent(), EfiSimpleNetworkStopped, ENOMEM, ENOTSUP, s_pxe_sw_undi::EntryPoint, EVT_NOTIFY_WAIT, free, s_pxe_sw_undi::Fudge, _EFI_COMPONENT_NAME2_PROTOCOL::GetControllerName, _EFI_COMPONENT_NAME2_PROTOCOL::GetDriverName, efi_snp_device::handle, _EFI_NETWORK_INTERFACE_IDENTIFIER_PROTOCOL::Id, s_pxe_sw_undi::IFcnt, s_pxe_sw_undi::IFcntExt, _EFI_NETWORK_INTERFACE_IDENTIFIER_PROTOCOL::IfNum, INIT_LIST_HEAD, EFI_BOOT_SERVICES::InstallMultipleProtocolInterfaces, efi_snp_device::list, list_add, list_del, ll_protocol::ll_addr_len, net_device::ll_protocol, efi_snp_device::load_file, memcpy(), efi_snp_device::mode, _EFI_SIMPLE_NETWORK_PROTOCOL::Mode, efi_snp_device::name, device::name, net_device::name, efi_snp_device::name2, efi_snp_device::netdev, netdev, netdev_addr(), netdev_get(), netdev_put(), efi_snp_device::nii, NULL, efi_snp_device::package_list, efi_snp_device::parent, efi_snp_device::path, product_short_name, rc, efi_snp_device::rx, efi_snp_device::snp, snprintf(), EFI_SIMPLE_NETWORK_MODE::State, strerror(), _EFI_COMPONENT_NAME2_PROTOCOL::SupportedLanguages, TPL_NOTIFY, EFI_BOOT_SERVICES::UninstallMultipleProtocolInterfaces, efi_snp_device::vcfg, VLAN_TAG, vlan_tci(), _EFI_SIMPLE_NETWORK_PROTOCOL::WaitForPacket, and zalloc().

efi_snp_notify()

static void efi_snp_notify ( struct net_device *  netdev, void *priv  __unused  )

static

Handle SNP device or link state change.

Parameters

netdev	Network device
priv	Private data

Definition at line 2010 of file efi_snp.c.

                                                                              {
        struct efi_snp_device *snpdev;

        /* Locate SNP device */
        snpdev = efi_snp_demux ( netdev );
        if ( ! snpdev ) {
                DBG ( "SNP skipping non-SNP device %s\n", netdev->name );
                return;
        }

        /* Update link state */
        snpdev->mode.MediaPresent =
                ( netdev_link_ok ( netdev ) ? TRUE : FALSE );
        DBGC ( snpdev, "SNPDEV %p link is %s\n", snpdev,
               ( snpdev->mode.MediaPresent ? "up" : "down" ) );

        /* Update mode state */
        efi_snp_set_state ( snpdev );
}

References DBG, DBGC, efi_snp_demux(), efi_snp_set_state(), FALSE, EFI_SIMPLE_NETWORK_MODE::MediaPresent, efi_snp_device::mode, net_device::name, netdev, netdev_link_ok(), and TRUE.

efi_snp_remove()

static void efi_snp_remove ( struct net_device *  netdev, void *priv  __unused  )

static

Destroy SNP device.

Parameters

netdev	Network device
priv	Private data

Definition at line 2036 of file efi_snp.c.

                                                                              {
        EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
        struct efi_snp_device *snpdev;
        int leak = efi_shutdown_in_progress;
        EFI_STATUS efirc;

        /* Locate SNP device */
        snpdev = efi_snp_demux ( netdev );
        if ( ! snpdev ) {
                DBG ( "SNP skipping non-SNP device %s\n", netdev->name );
                return;
        }

        /* Uninstall the SNP */
        list_del ( &snpdev->list );
        if ( snpdev->package_list )
                leak |= efi_snp_hii_uninstall ( snpdev );
        if ( snpdev->parent )
                efi_child_del ( snpdev->parent, snpdev->handle );
        efi_close_by_driver ( snpdev->handle, &efi_nii_protocol_guid );
        efi_close_by_driver ( snpdev->handle, &efi_nii31_protocol_guid );
        if ( ( ! efi_shutdown_in_progress ) &&
             ( ( efirc = bs->UninstallMultipleProtocolInterfaces (
                        snpdev->handle,
                        &efi_simple_network_protocol_guid, &snpdev->snp,
                        &efi_device_path_protocol_guid, snpdev->path,
                        &efi_nii_protocol_guid, &snpdev->nii,
                        &efi_nii31_protocol_guid, &snpdev->nii,
                        &efi_vlan_config_protocol_guid, &snpdev->vcfg,
                        &efi_component_name2_protocol_guid, &snpdev->name2,
                        &efi_load_file_protocol_guid, &snpdev->load_file,
                        NULL ) ) != 0 ) ) {
                DBGC ( snpdev, "SNPDEV %p could not uninstall: %s\n",
                       snpdev, strerror ( -EEFI ( efirc ) ) );
                leak = 1;
        }
        efi_nullify_snp ( &snpdev->snp );
        efi_nullify_nii ( &snpdev->nii );
        efi_nullify_vlan ( &snpdev->vcfg );
        efi_nullify_name2 ( &snpdev->name2 );
        efi_nullify_load_file ( &snpdev->load_file );
        if ( ! leak )
                free ( snpdev->path );
        bs->CloseEvent ( snpdev->snp.WaitForPacket );
        if ( ! leak ) {
                netdev_put ( snpdev->netdev );
                free ( snpdev );
        }

        /* Report leakage, if applicable */
        if ( leak && ( ! efi_shutdown_in_progress ) )
                DBGC ( snpdev, "SNPDEV %p nullified and leaked\n", snpdev );
}

References EFI_SYSTEM_TABLE::BootServices, EFI_BOOT_SERVICES::CloseEvent, DBG, DBGC, EEFI, efi_child_del(), efi_close_by_driver(), efi_component_name2_protocol_guid, efi_device_path_protocol_guid, efi_load_file_protocol_guid, efi_nii31_protocol_guid, efi_nii_protocol_guid, efi_nullify_load_file(), efi_nullify_name2(), efi_nullify_nii(), efi_nullify_snp(), efi_nullify_vlan(), efi_shutdown_in_progress, efi_simple_network_protocol_guid, efi_snp_demux(), efi_snp_hii_uninstall(), efi_systab, efi_vlan_config_protocol_guid, free, efi_snp_device::handle, efi_snp_device::list, list_del, efi_snp_device::load_file, net_device::name, efi_snp_device::name2, efi_snp_device::netdev, netdev, netdev_put(), efi_snp_device::nii, NULL, efi_snp_device::package_list, efi_snp_device::parent, efi_snp_device::path, efi_snp_device::snp, strerror(), EFI_BOOT_SERVICES::UninstallMultipleProtocolInterfaces, efi_snp_device::vcfg, and _EFI_SIMPLE_NETWORK_PROTOCOL::WaitForPacket.

find_snpdev()

struct efi_snp_device* find_snpdev

(

EFI_HANDLE

handle

)

Find SNP device by EFI device handle.

Parameters

handle

EFI device handle

Return values

snpdev

SNP device, or NULL

Definition at line 2104 of file efi_snp.c.

                                                          {
        struct efi_snp_device *snpdev;

        list_for_each_entry ( snpdev, &efi_snp_devices, list ) {
                if ( snpdev->handle == handle )
                        return snpdev;
        }
        return NULL;
}

References handle, efi_snp_device::handle, efi_snp_device::list, list_for_each_entry, and NULL.

Referenced by snpnet_supported().

last_opened_snpdev()

struct efi_snp_device* last_opened_snpdev

(

void

)

Get most recently opened SNP device.

Return values

snpdev

Most recently opened SNP device, or NULL

Definition at line 2119 of file efi_snp.c.

                                                    {
        struct net_device *netdev;

        netdev = last_opened_netdev();
        if ( ! netdev )
                return NULL;

        return efi_snp_demux ( netdev );
}

References efi_snp_demux(), last_opened_netdev(), netdev, and NULL.

Referenced by efi_image_exec().

efi_snp_add_claim()

void efi_snp_add_claim

(

int

delta

)

Add to SNP claimed/released count.

Parameters

delta

Claim count change

Definition at line 2134 of file efi_snp.c.

                                     {
        struct efi_snp_device *snpdev;

        /* Raise TPL if we are about to claim devices */
        if ( ! efi_snp_claimed )
                efi_raise_tpl ( &efi_snp_saved_tpl );

        /* Claim SNP devices */
        efi_snp_claimed += delta;
        assert ( efi_snp_claimed >= 0 );

        /* Update SNP mode state for each interface */
        list_for_each_entry ( snpdev, &efi_snp_devices, list )
                efi_snp_set_state ( snpdev );

        /* Restore TPL if we have released devices */
        if ( ! efi_snp_claimed )
                efi_restore_tpl ( &efi_snp_saved_tpl );
}

References assert(), efi_raise_tpl(), efi_restore_tpl(), efi_snp_claimed, efi_snp_saved_tpl, efi_snp_set_state(), efi_snp_device::list, and list_for_each_entry.

Referenced by efi_snp_claim(), and efi_snp_release().

Variable Documentation

efi_snp_claimed

int efi_snp_claimed

static

Network devices are currently claimed for use by iPXE.

Definition at line 49 of file efi_snp.c.

Referenced by efi_snp_add_claim(), efi_snp_get_status(), efi_snp_initialize(), efi_snp_mcast_ip_to_mac(), efi_snp_nvdata(), efi_snp_receive(), efi_snp_reset(), efi_snp_set_state(), efi_snp_shutdown(), efi_snp_start(), efi_snp_station_address(), efi_snp_statistics(), efi_snp_stop(), efi_snp_transmit(), efi_snp_wait_for_packet(), and efi_undi_issue().

efi_snp_saved_tpl

struct efi_saved_tpl efi_snp_saved_tpl

static

TPL prior to network devices being claimed.

Definition at line 52 of file efi_snp.c.

Referenced by efi_snp_add_claim().

efi_snp_device_snp

EFI_SIMPLE_NETWORK_PROTOCOL efi_snp_device_snp

static

Initial value:

= {
        .Revision       = EFI_SIMPLE_NETWORK_PROTOCOL_REVISION,
        .Start          = efi_snp_start,
        .Stop           = efi_snp_stop,
        .Initialize     = efi_snp_initialize,
        .Reset          = efi_snp_reset,
        .Shutdown       = efi_snp_shutdown,
        .ReceiveFilters = efi_snp_receive_filters,
        .StationAddress = efi_snp_station_address,
        .Statistics     = efi_snp_statistics,
        .MCastIpToMac   = efi_snp_mcast_ip_to_mac,
        .NvData         = efi_snp_nvdata,
        .GetStatus      = efi_snp_get_status,
        .Transmit       = efi_snp_transmit,
        .Receive        = efi_snp_receive,
}

SNP interface.

Definition at line 873 of file efi_snp.c.

Referenced by efi_snp_probe().

efi_snp_undi

PXE_SW_UNDI efi_snp_undi

static

Initial value:

= {
        .Signature      = PXE_ROMID_SIGNATURE,
        .Len            = sizeof ( efi_snp_undi ),
        .Rev            = PXE_ROMID_REV,
        .MajorVer       = PXE_ROMID_MAJORVER,
        .MinorVer       = PXE_ROMID_MINORVER,
        .Implementation = ( PXE_ROMID_IMP_SW_VIRT_ADDR |
                            PXE_ROMID_IMP_STATION_ADDR_SETTABLE |
                            PXE_ROMID_IMP_PROMISCUOUS_MULTICAST_RX_SUPPORTED |
                            PXE_ROMID_IMP_PROMISCUOUS_RX_SUPPORTED |
                            PXE_ROMID_IMP_BROADCAST_RX_SUPPORTED |
                            PXE_ROMID_IMP_TX_COMPLETE_INT_SUPPORTED |
                            PXE_ROMID_IMP_PACKET_RX_INT_SUPPORTED ),
        
        .BusCnt         = 1,
        .BusType[0]     = PXE_BUSTYPE ( 'i', 'P', 'X', 'E' ),
}

UNDI interface.

Must be aligned on a 16-byte boundary, for no particularly good reason.

Definition at line 1460 of file efi_snp.c.

Referenced by efi_snp_probe().

efi_snp_device_nii

EFI_NETWORK_INTERFACE_IDENTIFIER_PROTOCOL efi_snp_device_nii

static

Initial value:

= {
        .Revision       = EFI_NETWORK_INTERFACE_IDENTIFIER_PROTOCOL_REVISION,
        .StringId       = "UNDI",
        .Type           = EfiNetworkInterfaceUndi,
        .MajorVer       = 3,
        .MinorVer       = 1,
        .Ipv6Supported  = TRUE, 
}

Network Identification Interface (NII)

Definition at line 1483 of file efi_snp.c.

Referenced by efi_snp_probe().

efi_vlan

EFI_VLAN_CONFIG_PROTOCOL efi_vlan

static

Initial value:

= {
        .Set            = efi_vlan_set,
        .Find           = efi_vlan_find,
        .Remove         = efi_vlan_remove,
}

VLAN configuration protocol.

Definition at line 1644 of file efi_snp.c.

Referenced by efi_snp_probe().

efi_snp_load_file_protocol

EFI_LOAD_FILE_PROTOCOL efi_snp_load_file_protocol

static

Initial value:

= {
        .LoadFile       = efi_snp_load_file,
}

Load file protocol.

Definition at line 1750 of file efi_snp.c.

Referenced by efi_snp_probe().

__net_driver

struct net_driver efi_snp_driver __net_driver

Initial value:

= {
        .name = "SNP",
        .probe = efi_snp_probe,
        .notify = efi_snp_notify,
        .remove = efi_snp_remove,
}

SNP driver.

Definition at line 2091 of file efi_snp.c.