summaryrefslogtreecommitdiffstats
path: root/src/interface
diff options
context:
space:
mode:
Diffstat (limited to 'src/interface')
-rw-r--r--src/interface/efi/efi_snp.c133
1 files changed, 126 insertions, 7 deletions
diff --git a/src/interface/efi/efi_snp.c b/src/interface/efi/efi_snp.c
index adeb38de3..9c541552b 100644
--- a/src/interface/efi/efi_snp.c
+++ b/src/interface/efi/efi_snp.c
@@ -70,6 +70,35 @@ static EFI_GUID efi_load_file_protocol_guid
static LIST_HEAD ( efi_snp_devices );
/**
+ * Set EFI SNP mode state
+ *
+ * @v snp SNP interface
+ */
+static void efi_snp_set_state ( struct efi_snp_device *snpdev ) {
+ 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 ( ! netdev_rx_frozen ( netdev ) ) {
+ /* 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;
+ }
+}
+
+/**
* Set EFI SNP mode based on iPXE net device parameters
*
* @v snp SNP interface
@@ -134,7 +163,12 @@ efi_snp_start ( EFI_SIMPLE_NETWORK_PROTOCOL *snp ) {
DBGC2 ( snpdev, "SNPDEV %p START\n", snpdev );
- snpdev->mode.State = EfiSimpleNetworkStarted;
+ /* Fail if net device is currently claimed for use by iPXE */
+ if ( ! netdev_rx_frozen ( snpdev->netdev ) )
+ return EFI_NOT_READY;
+
+ snpdev->started = 1;
+ efi_snp_set_state ( snpdev );
return 0;
}
@@ -151,7 +185,12 @@ efi_snp_stop ( EFI_SIMPLE_NETWORK_PROTOCOL *snp ) {
DBGC2 ( snpdev, "SNPDEV %p STOP\n", snpdev );
- snpdev->mode.State = EfiSimpleNetworkStopped;
+ /* Fail if net device is currently claimed for use by iPXE */
+ if ( ! netdev_rx_frozen ( snpdev->netdev ) )
+ return EFI_NOT_READY;
+
+ snpdev->started = 0;
+ efi_snp_set_state ( snpdev );
return 0;
}
@@ -174,13 +213,17 @@ efi_snp_initialize ( EFI_SIMPLE_NETWORK_PROTOCOL *snp,
snpdev, ( ( unsigned long ) extra_rx_bufsize ),
( ( unsigned long ) extra_tx_bufsize ) );
+ /* Fail if net device is currently claimed for use by iPXE */
+ if ( ! netdev_rx_frozen ( snpdev->netdev ) )
+ return EFI_NOT_READY;
+
if ( ( rc = netdev_open ( snpdev->netdev ) ) != 0 ) {
DBGC ( snpdev, "SNPDEV %p could not open %s: %s\n",
snpdev, snpdev->netdev->name, strerror ( rc ) );
return EFIRC ( rc );
}
+ efi_snp_set_state ( snpdev );
- snpdev->mode.State = EfiSimpleNetworkInitialized;
return 0;
}
@@ -200,16 +243,20 @@ efi_snp_reset ( EFI_SIMPLE_NETWORK_PROTOCOL *snp, BOOLEAN ext_verify ) {
DBGC2 ( 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 ( ! netdev_rx_frozen ( snpdev->netdev ) )
+ return EFI_NOT_READY;
+
netdev_close ( snpdev->netdev );
- snpdev->mode.State = EfiSimpleNetworkStarted;
+ efi_snp_set_state ( snpdev );
if ( ( rc = netdev_open ( snpdev->netdev ) ) != 0 ) {
DBGC ( snpdev, "SNPDEV %p could not reopen %s: %s\n",
snpdev, snpdev->netdev->name, strerror ( rc ) );
return EFIRC ( rc );
}
+ efi_snp_set_state ( snpdev );
- snpdev->mode.State = EfiSimpleNetworkInitialized;
return 0;
}
@@ -226,8 +273,13 @@ efi_snp_shutdown ( EFI_SIMPLE_NETWORK_PROTOCOL *snp ) {
DBGC2 ( snpdev, "SNPDEV %p SHUTDOWN\n", snpdev );
+ /* Fail if net device is currently claimed for use by iPXE */
+ if ( ! netdev_rx_frozen ( snpdev->netdev ) )
+ return EFI_NOT_READY;
+
netdev_close ( snpdev->netdev );
- snpdev->mode.State = EfiSimpleNetworkStarted;
+ efi_snp_set_state ( snpdev );
+
return 0;
}
@@ -258,6 +310,10 @@ efi_snp_receive_filters ( EFI_SIMPLE_NETWORK_PROTOCOL *snp, UINT32 enable,
snpdev->netdev->ll_protocol->ll_addr_len );
}
+ /* Fail if net device is currently claimed for use by iPXE */
+ if ( ! netdev_rx_frozen ( snpdev->netdev ) )
+ return EFI_NOT_READY;
+
/* Lie through our teeth, otherwise MNP refuses to accept us */
return 0;
}
@@ -280,6 +336,10 @@ efi_snp_station_address ( EFI_SIMPLE_NETWORK_PROTOCOL *snp, BOOLEAN reset,
DBGC2 ( 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 ( ! netdev_rx_frozen ( snpdev->netdev ) )
+ return EFI_NOT_READY;
+
/* Set the MAC address */
if ( reset )
new = &snpdev->mode.PermanentAddress;
@@ -313,6 +373,10 @@ efi_snp_statistics ( EFI_SIMPLE_NETWORK_PROTOCOL *snp, BOOLEAN reset,
DBGC2 ( snpdev, "SNPDEV %p STATISTICS%s", snpdev,
( reset ? " reset" : "" ) );
+ /* Fail if net device is currently claimed for use by iPXE */
+ if ( ! netdev_rx_frozen ( snpdev->netdev ) )
+ return EFI_NOT_READY;
+
/* Gather statistics */
memset ( &stats_buf, 0, sizeof ( stats_buf ) );
stats_buf.TxGoodFrames = snpdev->netdev->tx_stats.good;
@@ -361,6 +425,10 @@ efi_snp_mcast_ip_to_mac ( EFI_SIMPLE_NETWORK_PROTOCOL *snp, BOOLEAN ipv6,
inet_ntoa ( *( ( struct in_addr * ) ip ) ) );
DBGC2 ( snpdev, "SNPDEV %p MCAST_IP_TO_MAC %s\n", snpdev, ip_str );
+ /* Fail if net device is currently claimed for use by iPXE */
+ if ( ! netdev_rx_frozen ( snpdev->netdev ) )
+ return EFI_NOT_READY;
+
/* Try to hash the address */
if ( ( rc = ll_protocol->mc_hash ( ( ipv6 ? AF_INET6 : AF_INET ),
ip, mac ) ) != 0 ) {
@@ -394,6 +462,10 @@ efi_snp_nvdata ( EFI_SIMPLE_NETWORK_PROTOCOL *snp, BOOLEAN read,
if ( ! read )
DBGC2_HDA ( snpdev, offset, data, len );
+ /* Fail if net device is currently claimed for use by iPXE */
+ if ( ! netdev_rx_frozen ( snpdev->netdev ) )
+ return EFI_NOT_READY;
+
return EFI_UNSUPPORTED;
}
@@ -413,6 +485,10 @@ efi_snp_get_status ( EFI_SIMPLE_NETWORK_PROTOCOL *snp,
DBGC2 ( snpdev, "SNPDEV %p GET_STATUS", snpdev );
+ /* Fail if net device is currently claimed for use by iPXE */
+ if ( ! netdev_rx_frozen ( snpdev->netdev ) )
+ return EFI_NOT_READY;
+
/* Poll the network device */
efi_snp_poll ( snpdev );
@@ -508,6 +584,10 @@ efi_snp_transmit ( EFI_SIMPLE_NETWORK_PROTOCOL *snp,
}
DBGC2 ( snpdev, "\n" );
+ /* Fail if net device is currently claimed for use by iPXE */
+ if ( ! netdev_rx_frozen ( snpdev->netdev ) )
+ return EFI_NOT_READY;
+
/* Sanity checks */
if ( ll_header_len ) {
if ( ll_header_len != ll_protocol->ll_header_len ) {
@@ -616,6 +696,10 @@ efi_snp_receive ( EFI_SIMPLE_NETWORK_PROTOCOL *snp,
DBGC2 ( snpdev, "SNPDEV %p RECEIVE %p(+%lx)", snpdev, data,
( ( unsigned long ) *len ) );
+ /* Fail if net device is currently claimed for use by iPXE */
+ if ( ! netdev_rx_frozen ( snpdev->netdev ) )
+ return EFI_NOT_READY;
+
/* Poll the network device */
efi_snp_poll ( snpdev );
@@ -655,7 +739,7 @@ efi_snp_receive ( EFI_SIMPLE_NETWORK_PROTOCOL *snp,
out_bad_ll_header:
free_iob ( iobuf );
-out_no_packet:
+ out_no_packet:
return EFIRC ( rc );
}
@@ -676,6 +760,10 @@ static VOID EFIAPI efi_snp_wait_for_packet ( EFI_EVENT event,
if ( ! netdev_is_open ( snpdev->netdev ) )
return;
+ /* Do nothing if net device is currently claimed for use by iPXE */
+ if ( ! netdev_rx_frozen ( snpdev->netdev ) )
+ return;
+
/* Poll the network device */
efi_snp_poll ( snpdev );
@@ -785,9 +873,15 @@ efi_snp_load_file ( EFI_LOAD_FILE_PROTOCOL *load_file,
return EFI_UNSUPPORTED;
}
+ /* Claim network devices for use by iPXE */
+ efi_snp_claim();
+
/* Boot from network device */
ipxe ( netdev );
+ /* Release network devices for use via SNP */
+ efi_snp_release();
+
/* Assume boot process was aborted */
return EFI_ABORTED;
}
@@ -1011,6 +1105,9 @@ static void efi_snp_notify ( struct net_device *netdev ) {
( 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 );
}
/**
@@ -1069,3 +1166,25 @@ struct efi_snp_device * last_opened_snpdev ( void ) {
return efi_snp_demux ( netdev );
}
+
+/**
+ * Claim network devices for use by iPXE
+ *
+ */
+void efi_snp_claim ( void ) {
+ struct net_device *netdev;
+
+ for_each_netdev ( netdev )
+ netdev_rx_unfreeze ( netdev );
+}
+
+/**
+ * Release network devices for use via SNP
+ *
+ */
+void efi_snp_release ( void ) {
+ struct net_device *netdev;
+
+ for_each_netdev ( netdev )
+ netdev_rx_freeze ( netdev );
+}
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2026-02-27 21:02:24 +0100