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[efi] Allow network devices to be created on top of arbitrary SNP devices

Browse Source 
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown 2014-07-01 17:58:09 +01:00
parent cb2f6ca46f
commit c7051d826b
11 changed files with 653 additions and 407 deletions
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219
src/drivers/net/efi/snp.c Normal file
View File

@ -0,0 +1,219 @@
/*
* Copyright (C) 2014 Michael Brown <mbrown@fensystems.co.uk>.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
FILE_LICENCE ( GPL2_OR_LATER );
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <ipxe/efi/efi.h>
#include <ipxe/efi/Protocol/SimpleNetwork.h>
#include <ipxe/efi/efi_driver.h>
#include <ipxe/efi/efi_snp.h>
#include <ipxe/efi/efi_pci.h>
#include "snpnet.h"
#include "snp.h"
/** @file
*
* SNP driver
*
*/
/** EFI simple network protocol GUID */
static EFI_GUID efi_simple_network_protocol_guid
= EFI_SIMPLE_NETWORK_PROTOCOL_GUID;
/** EFI PCI I/O protocol GUID */
static EFI_GUID efi_pci_io_protocol_guid
= EFI_PCI_IO_PROTOCOL_GUID;
/**
* Check to see if driver supports a device
*
* @v device EFI device handle
* @ret rc Return status code
*/
static int snp_supported ( EFI_HANDLE device ) {
EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
EFI_STATUS efirc;
/* Check that this is not a device we are providing ourselves */
if ( find_snpdev ( device ) != NULL ) {
DBGCP ( device, "SNP %p %s is provided by this binary\n",
device, efi_handle_devpath_text ( device ) );
return -ENOTTY;
}
/* Test for presence of simple network protocol */
if ( ( efirc = bs->OpenProtocol ( device,
&efi_simple_network_protocol_guid,
NULL, efi_image_handle, device,
EFI_OPEN_PROTOCOL_TEST_PROTOCOL))!=0){
DBGCP ( device, "SNP %p %s is not an SNP device\n",
device, efi_handle_devpath_text ( device ) );
return -EEFI ( efirc );
}
DBGC ( device, "SNP %p %s is an SNP device\n",
device, efi_handle_devpath_text ( device ) );
return 0;
}
/**
* Get underlying PCI device information
*
* @v snpdev SNP device
* @ret rc Return status code
*/
static int snp_pci_info ( struct snp_device *snpdev ) {
EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
struct efi_device *efidev = snpdev->efidev;
EFI_DEVICE_PATH_PROTOCOL *devpath = efidev->path;
struct pci_device pci;
EFI_HANDLE device;
EFI_STATUS efirc;
int rc;
/* Check for presence of PCI I/O protocol */
if ( ( efirc = bs->LocateDevicePath ( &efi_pci_io_protocol_guid,
&devpath, &device ) ) != 0 ) {
DBGC ( efidev->device, "SNP %p %s is not a PCI device\n",
efidev->device, efi_devpath_text ( efidev->path ) );
return -EEFI ( efirc );
}
/* Get PCI device information */
if ( ( rc = efipci_info ( device, &pci ) ) != 0 ) {
DBGC ( efidev->device, "SNP %p %s could not get PCI "
"information: %s\n", efidev->device,
efi_devpath_text ( efidev->path ), strerror ( rc ) );
return rc;
}
/* Populate SNP device information */
memcpy ( &snpdev->dev.desc, &pci.dev.desc, sizeof ( snpdev->dev.desc ));
snprintf ( snpdev->dev.name, sizeof ( snpdev->dev.name ), "SNP-%s",
pci.dev.name );
return 0;
}
/**
* Attach driver to device
*
* @v efidev EFI device
* @ret rc Return status code
*/
static int snp_start ( struct efi_device *efidev ) {
EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
EFI_HANDLE device = efidev->device;
struct snp_device *snpdev;
union {
EFI_SIMPLE_NETWORK_PROTOCOL *snp;
void *interface;
} snp;
EFI_STATUS efirc;
int rc;
/* Check that this is not a device we are providing ourselves */
if ( find_snpdev ( efidev->device ) != NULL ) {
DBGCP ( device, "SNP %p %s is provided by this binary\n",
device, efi_devpath_text ( efidev->path ) );
rc = -ENOTTY;
goto err_own;
}
/* Allocate and initialise structure */
snpdev = zalloc ( sizeof ( *snpdev ) );
if ( ! snpdev ) {
rc = -ENOMEM;
goto err_alloc;
}
snpdev->efidev = efidev;
snpdev->dev.driver_name = "SNP";
INIT_LIST_HEAD ( &snpdev->dev.children );
/* See if device is an SNP device */
if ( ( efirc = bs->OpenProtocol ( device,
&efi_simple_network_protocol_guid,
&snp.interface, efi_image_handle,
device,
( EFI_OPEN_PROTOCOL_BY_DRIVER |
EFI_OPEN_PROTOCOL_EXCLUSIVE )))!=0){
rc = -EEFI ( efirc );
DBGCP ( device, "SNP %p %s cannot open SNP protocol: %s\n",
device, efi_devpath_text ( efidev->path ),
strerror ( rc ) );
goto err_open_protocol;
}
snpdev->snp = snp.snp;
/* Get underlying device information */
if ( ( rc = snp_pci_info ( snpdev ) ) != 0 )
goto err_info;
/* Mark SNP device as a child of the EFI device */
snpdev->dev.parent = &efidev->dev;
list_add ( &snpdev->dev.siblings, &efidev->dev.children );
/* Create SNP network device */
if ( ( rc = snpnet_probe ( snpdev ) ) != 0 )
goto err_probe;
efidev_set_drvdata ( efidev, snpdev );
return 0;
snpnet_remove ( snpdev );
err_probe:
list_del ( &snpdev->dev.siblings );
err_info:
bs->CloseProtocol ( device, &efi_simple_network_protocol_guid,
efi_image_handle, device );
err_open_protocol:
free ( snpdev );
err_alloc:
err_own:
return rc;
}
/**
* Detach driver from device
*
* @v efidev EFI device
*/
static void snp_stop ( struct efi_device *efidev ) {
EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
struct snp_device *snpdev = efidev_get_drvdata ( efidev );
snpnet_remove ( snpdev );
list_del ( &snpdev->dev.siblings );
bs->CloseProtocol ( efidev->device, &efi_simple_network_protocol_guid,
efi_image_handle, efidev->device );
free ( snpdev );
}
/** EFI SNP driver */
struct efi_driver snp_driver __efi_driver ( EFI_DRIVER_NORMAL ) = {
.name = "SNP",
.supported = snp_supported,
.start = snp_start,
.stop = snp_stop,
};

15
src/drivers/net/efi/snp.h
View File

@ -28,22 +28,21 @@
FILE_LICENCE ( GPL2_OR_LATER );
#include <ipxe/device.h>
#include <ipxe/netdevice.h>
#include <ipxe/efi/efi.h>
#include <ipxe/efi/Protocol/SimpleNetwork.h>
/** A network device that consumes the EFI Simple Network Protocol */
/** An SNP device */
struct snp_device {
/** Underlying simple network protocol instance */
/** EFI device */
struct efi_device *efidev;
/** Simple network protocol */
EFI_SIMPLE_NETWORK_PROTOCOL *snp;
/** Generic device */
struct device dev;
/** Network device */
struct net_device *netdev;
/** State to put the snp in when removing the device */
uint32 removal_state;
/** State to restore when removing the device */
UINT32 removal_state;
};
#endif /* _SNP_H */

3
src/include/ipxe/device.h
View File

@ -57,6 +57,9 @@ struct device_description {
/** TAP bus type */
#define BUS_TYPE_TAP 6
/** EFI bus type */
#define BUS_TYPE_EFI 7
/** A hardware device */
struct device {
/** Name */

49
src/include/ipxe/efi/efi_driver.h
View File

@ -8,10 +8,25 @@
FILE_LICENCE ( GPL2_OR_LATER );
#include <ipxe/device.h>
#include <ipxe/tables.h>
#include <ipxe/efi/efi.h>
#include <ipxe/efi/Protocol/DevicePath.h>
/** An EFI device */
struct efi_device {
/** Generic device */
struct device dev;
/** EFI device handle */
EFI_HANDLE device;
/** Device path */
EFI_DEVICE_PATH_PROTOCOL *path;
/** Driver for this device */
struct efi_driver *driver;
/** Driver-private data */
void *priv;
};
/** An EFI driver */
struct efi_driver {
/** Name */
@ -19,23 +34,23 @@ struct efi_driver {
/**
* Check if driver supports device
*
* @v device Device
* @v device EFI device handle
* @ret rc Return status code
*/
int ( * supported ) ( EFI_HANDLE device );
/**
* Attach driver to device
*
* @v device Device
* @v efidev EFI device
* @ret rc Return status code
*/
int ( * start ) ( EFI_HANDLE device );
int ( * start ) ( struct efi_device *efidev );
/**
* Detach driver from device
*
* @v device Device
* @v efidev EFI device
*/
void ( * stop ) ( EFI_HANDLE device );
void ( * stop ) ( struct efi_device *efidev );
};
/** EFI driver table */
@ -48,8 +63,32 @@ struct efi_driver {
#define EFI_DRIVER_NORMAL 02 /**< Normal drivers */
#define EFI_DRIVER_LATE 03 /**< Late drivers */
/**
* Set EFI driver-private data
*
* @v efidev EFI device
* @v priv Private data
*/
static inline void efidev_set_drvdata ( struct efi_device *efidev,
void *priv ) {
efidev->priv = priv;
}
/**
* Get EFI driver-private data
*
* @v efidev EFI device
* @ret priv Private data
*/
static inline void * efidev_get_drvdata ( struct efi_device *efidev ) {
return efidev->priv;
}
extern EFI_DEVICE_PATH_PROTOCOL *
efi_devpath_end ( EFI_DEVICE_PATH_PROTOCOL *path );
extern struct efi_device * efidev_parent ( struct device *dev );
extern int efidev_child_add ( struct efi_device *efidev, EFI_HANDLE device );
extern void efidev_child_del ( struct efi_device *efidev, EFI_HANDLE device );
extern int efi_driver_install ( void );
extern void efi_driver_uninstall ( void );
extern int efi_driver_connect_all ( void );

32
src/include/ipxe/efi/efi_pci.h
View File

@ -8,40 +8,18 @@
FILE_LICENCE ( GPL2_OR_LATER );
#include <ipxe/pci.h>
#include <ipxe/efi/efi.h>
#include <ipxe/efi/Protocol/PciIo.h>
#include <ipxe/efi/Protocol/DevicePath.h>
/* PciRootBridgeIo.h uses LShiftU64(), which isn't defined anywhere else */
static inline EFIAPI uint64_t LShiftU64 ( UINT64 value, UINTN shift ) {
return ( value << shift );
}
struct device;
/** An EFI PCI device */
struct efi_pci_device {
/** List of EFI PCI devices */
struct list_head list;
/** iPXE PCI device */
struct pci_device pci;
/** Underlying EFI device */
EFI_HANDLE device;
/** PCI I/O protocol */
EFI_PCI_IO_PROTOCOL *pci_io;
/** Device path */
EFI_DEVICE_PATH_PROTOCOL *path;
};
extern int efipci_create ( EFI_HANDLE device, UINT32 attributes,
struct efi_pci_device **efipci );
extern int efipci_enable ( struct efi_pci_device *efipci );
extern struct efi_pci_device * efipci_find_efi ( EFI_HANDLE device );
extern struct efi_pci_device * efipci_find ( struct device *dev );
extern int efipci_child_add ( struct efi_pci_device *efipci,
EFI_HANDLE device );
extern void efipci_child_del ( struct efi_pci_device *efipci,
EFI_HANDLE device );
extern void efipci_destroy ( struct efi_pci_device *efipci );
extern int efipci_open ( EFI_HANDLE device, UINT32 attributes,
struct pci_device *pci );
extern void efipci_close ( EFI_HANDLE device );
extern int efipci_info ( EFI_HANDLE device, struct pci_device *pci );
#endif /* _IPXE_EFI_PCI_H */

5
src/include/ipxe/efi/efi_snp.h
View File

@ -24,8 +24,8 @@ struct efi_snp_device {
struct list_head list;
/** The underlying iPXE network device */
struct net_device *netdev;
/** The underlying EFI PCI device */
struct efi_pci_device *efipci;
/** The underlying EFI device */
struct efi_device *efidev;
/** EFI device handle */
EFI_HANDLE handle;
/** The SNP structure itself */
@ -76,6 +76,7 @@ struct efi_snp_device {
extern int efi_snp_hii_install ( struct efi_snp_device *snpdev );
extern void efi_snp_hii_uninstall ( struct efi_snp_device *snpdev );
extern struct efi_snp_device * find_snpdev ( EFI_HANDLE handle );
extern struct efi_snp_device * last_opened_snpdev ( void );
extern void efi_snp_claim ( void );
extern void efi_snp_release ( void );

1
src/include/ipxe/errfile.h
View File

@ -154,6 +154,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
#define ERRFILE_intel ( ERRFILE_DRIVER | 0x00650000 )
#define ERRFILE_myson ( ERRFILE_DRIVER | 0x00660000 )
#define ERRFILE_intelx ( ERRFILE_DRIVER | 0x00670000 )
#define ERRFILE_snp ( ERRFILE_DRIVER | 0x00680000 )
#define ERRFILE_scsi ( ERRFILE_DRIVER | 0x00700000 )
#define ERRFILE_arbel ( ERRFILE_DRIVER | 0x00710000 )

120
src/interface/efi/efi_bofm.c
View File

@ -155,38 +155,28 @@ static EFI_GUID bofm2_protocol_guid =
/**
* Check if device is supported
*
* @v device EFI device
* @v device EFI device handle
* @ret rc Return status code
*/
static int efi_bofm_supported ( EFI_HANDLE device ) {
EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
struct pci_device pci;
union {
IBM_BOFM_DRIVER_CONFIGURATION_PROTOCOL *bofm1;
void *interface;
} bofm1;
struct efi_pci_device *efipci;
EFI_STATUS efirc;
int rc;
/* Do nothing if we are already driving this device */
efipci = efipci_find_efi ( device );
if ( efipci ) {
DBGCP ( device, "EFIBOFM %p %s already started\n",
device, efi_devpath_text ( efipci->path ) );
rc = -EALREADY;
goto err_already_started;
}
/* Create corresponding PCI device, if any */
if ( ( rc = efipci_create ( device, EFI_OPEN_PROTOCOL_GET_PROTOCOL,
&efipci ) ) != 0 )
goto err_create;
/* Get PCI device information */
if ( ( rc = efipci_info ( device, &pci ) ) != 0 )
return rc;
/* Look for a BOFM driver */
if ( ( rc = bofm_find_driver ( &efipci->pci ) ) != 0 ) {
if ( ( rc = bofm_find_driver ( &pci ) ) != 0 ) {
DBGCP ( device, "EFIBOFM %p %s has no driver\n",
device, efi_devpath_text ( efipci->path ) );
goto err_no_driver;
device, efi_handle_devpath_text ( device ) );
return rc;
}
/* Locate BOFM protocol */
@ -194,8 +184,8 @@ static int efi_bofm_supported ( EFI_HANDLE device ) {
&bofm1.interface ) ) != 0 ) {
rc = -EEFI ( efirc );
DBGC ( device, "EFIBOFM %p %s cannot find BOFM protocol\n",
device, efi_devpath_text ( efipci->path ) );
goto err_not_bofm;
device, efi_handle_devpath_text ( device ) );
return rc;
}
/* Register support for this device */
@ -205,36 +195,25 @@ static int efi_bofm_supported ( EFI_HANDLE device ) {
0x02 /* Version */ ))!=0){
rc = -EEFI ( efirc );
DBGC ( device, "EFIBOFM %p %s could not register support: %s\n",
device, efi_devpath_text ( efipci->path ),
device, efi_handle_devpath_text ( device ),
strerror ( rc ) );
goto err_cannot_register;
return rc;
}
DBGC ( device, "EFIBOFM %p %s has driver \"%s\"\n", device,
efi_devpath_text ( efipci->path ), efipci->pci.id->name );
/* Destroy temporary PCI device */
efipci_destroy ( efipci );
DBGC ( device, "EFIBOFM %p %s has driver \"%s\"\n",
device, efi_handle_devpath_text ( device ), pci.id->name );
return 0;
err_cannot_register:
err_not_bofm:
err_no_driver:
efipci_destroy ( efipci );
err_create:
err_already_started:
return rc;
}
/**
* Attach driver to device
*
* @v device EFI device
* @v efidev EFI device
* @ret rc Return status code
*/
static int efi_bofm_start ( EFI_HANDLE device ) {
static int efi_bofm_start ( struct efi_device *efidev ) {
EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
EFI_HANDLE device = efidev->device;
union {
IBM_BOFM_DRIVER_CONFIGURATION_PROTOCOL *bofm1;
void *interface;
@ -243,42 +222,29 @@ static int efi_bofm_start ( EFI_HANDLE device ) {
IBM_BOFM_DRIVER_CONFIGURATION_PROTOCOL2 *bofm2;
void *interface;
} bofm2;
struct efi_pci_device *efipci;
struct pci_device pci;
IBM_BOFM_TABLE *bofmtab;
IBM_BOFM_TABLE *bofmtab2;
int bofmrc;
EFI_STATUS efirc;
int rc;
/* Do nothing if we are already driving this device */
efipci = efipci_find_efi ( device );
if ( efipci ) {
DBGCP ( device, "EFIPCI %p %s already started\n",
device, efi_devpath_text ( efipci->path ) );
rc = -EALREADY;
goto err_already_started;
}
/* Create corresponding PCI device */
if ( ( rc = efipci_create ( device, EFI_OPEN_PROTOCOL_GET_PROTOCOL,
&efipci ) ) != 0 )
goto err_create;
/* Enable PCI device */
if ( ( rc = efipci_enable ( efipci ) ) != 0 )
goto err_enable;
/* Open PCI device, if possible */
if ( ( rc = efipci_open ( device, EFI_OPEN_PROTOCOL_GET_PROTOCOL,
&pci ) ) != 0 )
goto err_open;
/* Locate BOFM protocol */
if ( ( efirc = bs->LocateProtocol ( &bofm1_protocol_guid, NULL,
&bofm1.interface ) ) != 0 ) {
rc = -EEFI ( efirc );
DBGC ( device, "EFIBOFM %p %s cannot find BOFM protocol\n",
device, efi_devpath_text ( efipci->path ) );
device, efi_devpath_text ( efidev->path ) );
goto err_locate_bofm;
}
bofmtab = &bofm1.bofm1->BofmTable;
DBGC ( device, "EFIBOFM %p %s found version 1 BOFM table at %p+%04x\n",
device, efi_devpath_text ( efipci->path ), bofmtab,
device, efi_devpath_text ( efidev->path ), bofmtab,
bofmtab->Parameters.Length );
/* Locate BOFM2 protocol, if available */
@ -286,36 +252,35 @@ static int efi_bofm_start ( EFI_HANDLE device ) {
&bofm2.interface ) ) == 0 ) {
bofmtab2 = &bofm2.bofm2->BofmTable;
DBGC ( device, "EFIBOFM %p %s found version 2 BOFM table at "
"%p+%04x\n", device, efi_devpath_text ( efipci->path ),
"%p+%04x\n", device, efi_devpath_text ( efidev->path ),
bofmtab2, bofmtab2->Parameters.Length );
assert ( bofm2.bofm2->RegisterSupport ==
bofm1.bofm1->RegisterSupport );
} else {
DBGC ( device, "EFIBOFM %p %s cannot find BOFM2 protocol\n",
device, efi_devpath_text ( efipci->path ) );
device, efi_devpath_text ( efidev->path ) );
/* Not a fatal error; may be a BOFM1-only system */
bofmtab2 = NULL;
}
/* Process BOFM table */
DBGC2 ( device, "EFIBOFM %p %s version 1 before processing:\n",
device, efi_devpath_text ( efipci->path ) );
device, efi_devpath_text ( efidev->path ) );
DBGC2_HD ( device, bofmtab, bofmtab->Parameters.Length );
if ( bofmtab2 ) {
DBGC2 ( device, "EFIBOFM %p %s version 2 before processing:\n",
device, efi_devpath_text ( efipci->path ) );
device, efi_devpath_text ( efidev->path ) );
DBGC2_HD ( device, bofmtab2, bofmtab2->Parameters.Length );
}
bofmrc = bofm ( virt_to_user ( bofmtab2 ? bofmtab2 : bofmtab ),
&efipci->pci );
bofmrc = bofm ( virt_to_user ( bofmtab2 ? bofmtab2 : bofmtab ), &pci );
DBGC ( device, "EFIBOFM %p %s status %08x\n",
device, efi_devpath_text ( efipci->path ), bofmrc );
device, efi_devpath_text ( efidev->path ), bofmrc );
DBGC2 ( device, "EFIBOFM %p %s version 1 after processing:\n",
device, efi_devpath_text ( efipci->path ) );
device, efi_devpath_text ( efidev->path ) );
DBGC2_HD ( device, bofmtab, bofmtab->Parameters.Length );
if ( bofmtab2 ) {
DBGC2 ( device, "EFIBOFM %p %s version 2 after processing:\n",
device, efi_devpath_text ( efipci->path ) );
device, efi_devpath_text ( efidev->path ) );
DBGC2_HD ( device, bofmtab2, bofmtab2->Parameters.Length );
}
@ -326,7 +291,7 @@ static int efi_bofm_start ( EFI_HANDLE device ) {
rc = -EEFI ( efirc );
DBGC ( device, "EFIBOFM %p %s could not set BOFM2 "
"status: %s\n",
device, efi_devpath_text ( efipci->path ),
device, efi_devpath_text ( efidev->path ),
strerror ( rc ) );
goto err_set_status;
}
@ -336,24 +301,19 @@ static int efi_bofm_start ( EFI_HANDLE device ) {
rc = -EEFI ( efirc );
DBGC ( device, "EFIBOFM %p %s could not set BOFM "
"status: %s\n",
device, efi_devpath_text ( efipci->path ),
device, efi_devpath_text ( efidev->path ),
strerror ( rc ) );
goto err_set_status;
}
}
/* Destroy the PCI device anyway; we have no further use for it */
efipci_destroy ( efipci );
/* BOFM (ab)uses the "start" method to mean "process and exit" */
return -EAGAIN;
rc = -EAGAIN;
err_set_status:
err_locate_bofm:
err_enable:
efipci_destroy ( efipci );
err_create:
err_already_started:
efipci_close ( device );
err_open:
return rc;
}
@ -362,8 +322,10 @@ static int efi_bofm_start ( EFI_HANDLE device ) {
*
* @v device EFI device
*/
static void efi_bofm_stop ( EFI_HANDLE device __unused ) {
/* Nothing to do */
static void efi_bofm_stop ( struct efi_device *efidev __unused ) {
/* Should never happen */
assert ( 0 );
}
/** EFI BOFM driver */

188
src/interface/efi/efi_driver.c
View File

@ -20,6 +20,7 @@
FILE_LICENCE ( GPL2_OR_LATER );
#include <stddef.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
@ -27,6 +28,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
#include <ipxe/efi/efi.h>
#include <ipxe/efi/Protocol/DriverBinding.h>
#include <ipxe/efi/Protocol/ComponentName2.h>
#include <ipxe/efi/Protocol/DevicePath.h>
#include <ipxe/efi/efi_strings.h>
#include <ipxe/efi/efi_driver.h>
@ -46,6 +48,13 @@ static EFI_GUID efi_driver_binding_protocol_guid
static EFI_GUID efi_component_name2_protocol_guid
= EFI_COMPONENT_NAME2_PROTOCOL_GUID;
/** EFI device path protocol GUID */
static EFI_GUID efi_device_path_protocol_guid
= EFI_DEVICE_PATH_PROTOCOL_GUID;
/** List of controlled EFI devices */
static LIST_HEAD ( efi_devices );
/**
* Find end of device path
*
@ -64,6 +73,99 @@ EFI_DEVICE_PATH_PROTOCOL * efi_devpath_end ( EFI_DEVICE_PATH_PROTOCOL *path ) {
return path;
}
/**
* Find EFI device
*
* @v device EFI device handle
* @ret efidev EFI device, or NULL if not found
*/
static struct efi_device * efidev_find ( EFI_HANDLE device ) {
struct efi_device *efidev;
/* Look for an existing EFI device */
list_for_each_entry ( efidev, &efi_devices, dev.siblings ) {
if ( efidev->device == device )
return efidev;
}
return NULL;
}
/**
* Get parent EFI device
*
* @v dev Generic device
* @ret efidev Parent EFI device, or NULL
*/
struct efi_device * efidev_parent ( struct device *dev ) {
struct device *parent = dev->parent;
struct efi_device *efidev;
/* Check that parent exists and is an EFI device */
if ( ! parent )
return NULL;
if ( parent->desc.bus_type != BUS_TYPE_EFI )
return NULL;
/* Get containing EFI device */
efidev = container_of ( parent, struct efi_device, dev );
return efidev;
}
/**
* Add EFI device as child of EFI device
*
* @v efidev EFI device
* @v device EFI child device handle
* @ret efirc EFI status code
*/
int efidev_child_add ( struct efi_device *efidev, EFI_HANDLE device ) {
EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
void *devpath;
EFI_STATUS efirc;
int rc;
/* Re-open the device path protocol */
if ( ( efirc = bs->OpenProtocol ( efidev->device,
&efi_device_path_protocol_guid,
&devpath,
efi_image_handle, device,
EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
) ) != 0 ) {
rc = -EEFI ( efirc );
DBGC ( efidev->device, "EFIDRV %p %s could not add child",
efidev->device, efi_devpath_text ( efidev->path ) );
DBGC ( efidev->device, " %p %s: %s\n", device,
efi_handle_devpath_text ( device ), strerror ( rc ) );
return rc;
}
DBGC2 ( efidev->device, "EFIDRV %p %s added child",
efidev->device, efi_devpath_text ( efidev->path ) );
DBGC2 ( efidev->device, " %p %s\n",
device, efi_handle_devpath_text ( device ) );
return 0;
}
/**
* Remove EFI device as child of EFI device
*
* @v efidev EFI device
* @v device EFI child device handle
* @ret efirc EFI status code
*/
void efidev_child_del ( struct efi_device *efidev, EFI_HANDLE device ) {
EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
bs->CloseProtocol ( efidev->device,
&efi_device_path_protocol_guid,
efi_image_handle, device );
DBGC2 ( efidev->device, "EFIDRV %p %s removed child",
efidev->device, efi_devpath_text ( efidev->path ) );
DBGC2 ( efidev->device, " %p %s\n",
device, efi_handle_devpath_text ( device ) );
}
/**
* Check to see if driver supports a device
*
@ -84,6 +186,13 @@ efi_driver_supported ( EFI_DRIVER_BINDING_PROTOCOL *driver __unused,
DBGCP ( device, " (child %s)", efi_devpath_text ( child ) );
DBGCP ( device, "\n" );
/* Do nothing if we are already driving this device */
if ( efidev_find ( device ) != NULL ) {
DBGCP ( device, "EFIDRV %p %s is already started\n",
device, efi_handle_devpath_text ( device ) );
return EFI_ALREADY_STARTED;
}
/* Look for a driver claiming to support this device */
for_each_table_entry ( efidrv, EFI_DRIVERS ) {
if ( ( rc = efidrv->supported ( device ) ) == 0 ) {
@ -110,7 +219,14 @@ efi_driver_supported ( EFI_DRIVER_BINDING_PROTOCOL *driver __unused,
static EFI_STATUS EFIAPI
efi_driver_start ( EFI_DRIVER_BINDING_PROTOCOL *driver __unused,
EFI_HANDLE device, EFI_DEVICE_PATH_PROTOCOL *child ) {
EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
struct efi_driver *efidrv;
struct efi_device *efidev;
union {
EFI_DEVICE_PATH_PROTOCOL *devpath;
void *interface;
} devpath;
EFI_STATUS efirc;
int rc;
DBGC ( device, "EFIDRV %p %s DRIVER_START",
@ -119,20 +235,61 @@ efi_driver_start ( EFI_DRIVER_BINDING_PROTOCOL *driver __unused,
DBGC ( device, " (child %s)", efi_devpath_text ( child ) );
DBGC ( device, "\n" );
/* Do nothing if we are already driving this device */
efidev = efidev_find ( device );
if ( efidev ) {
DBGCP ( device, "EFIDRV %p %s is already started\n",
device, efi_devpath_text ( efidev->path ) );
efirc = EFI_ALREADY_STARTED;
goto err_already_started;
}
/* Allocate and initialise structure */
efidev = zalloc ( sizeof ( *efidev ) );
if ( ! efidev ) {
efirc = EFI_OUT_OF_RESOURCES;
goto err_alloc;
}
efidev->device = device;
efidev->dev.desc.bus_type = BUS_TYPE_EFI;
INIT_LIST_HEAD ( &efidev->dev.children );
list_add ( &efidev->dev.siblings, &efi_devices );
/* Open device path protocol */
if ( ( efirc = bs->OpenProtocol ( device,
&efi_device_path_protocol_guid,
&devpath.interface,
efi_image_handle, device,
EFI_OPEN_PROTOCOL_BY_DRIVER ) ) != 0){
DBGCP ( device, "EFIDRV %p %s has no device path\n",
device, efi_handle_devpath_text ( device ) );
goto err_no_device_path;
}
efidev->path = devpath.devpath;
/* Try to start this device */
for_each_table_entry ( efidrv, EFI_DRIVERS ) {
if ( ( rc = efidrv->start ( device ) ) == 0 ) {
if ( ( rc = efidrv->start ( efidev ) ) == 0 ) {
efidev->driver = efidrv;
DBGC ( device, "EFIDRV %p %s using driver \"%s\"\n",
device, efi_handle_devpath_text ( device ),
efidrv->name );
device, efi_devpath_text ( efidev->path ),
efidev->driver->name );
return 0;
}
DBGC ( device, "EFIDRV %p %s could not start driver \"%s\": "
"%s\n", device, efi_handle_devpath_text ( device ),
"%s\n", device, efi_devpath_text ( efidev->path ),
efidrv->name, strerror ( rc ) );
}
efirc = EFI_UNSUPPORTED;
return EFI_UNSUPPORTED;
bs->CloseProtocol ( device, &efi_device_path_protocol_guid,
efi_image_handle, device );
err_no_device_path:
list_del ( &efidev->dev.siblings );
free ( efidev );
err_alloc:
err_already_started:
return efirc;
}
/**
@ -149,7 +306,9 @@ static EFI_STATUS EFIAPI
efi_driver_stop ( EFI_DRIVER_BINDING_PROTOCOL *driver __unused,
EFI_HANDLE device, UINTN num_children,
EFI_HANDLE *children ) {
EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
struct efi_driver *efidrv;
struct efi_device *efidev;
UINTN i;
DBGC ( device, "EFIDRV %p %s DRIVER_STOP",
@ -160,9 +319,22 @@ efi_driver_stop ( EFI_DRIVER_BINDING_PROTOCOL *driver __unused,
}
DBGC ( device, "\n" );
/* Try to stop this device */
for_each_table_entry ( efidrv, EFI_DRIVERS )
efidrv->stop ( device );
/* Do nothing unless we are driving this device */
efidev = efidev_find ( device );
if ( ! efidev ) {
DBGCP ( device, "EFIDRV %p %s is not started\n",
device, efi_devpath_text ( efidev->path ) );
return 0;
}
/* Stop this device */
efidrv = efidev->driver;
assert ( efidrv != NULL );
efidrv->stop ( efidev );
bs->CloseProtocol ( efidev->device, &efi_device_path_protocol_guid,
efi_image_handle, efidev->device );
list_del ( &efidev->dev.siblings );
free ( efidev );
return 0;
}

363
src/interface/efi/efi_pci.c
View File

@ -37,7 +37,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
/* Disambiguate the various error causes */
#define EINFO_EEFI_PCI \
__einfo_uniqify ( EINFO_EPLATFORM, 0x01, \
"Could not open PCI I/O protocols" )
"Could not open PCI I/O protocol" )
#define EINFO_EEFI_PCI_NOT_PCI \
__einfo_platformify ( EINFO_EEFI_PCI, EFI_UNSUPPORTED, \
"Not a PCI device" )
@ -124,49 +124,28 @@ PROVIDE_PCIAPI_INLINE ( efi, pci_write_config_dword );
static EFI_GUID efi_pci_io_protocol_guid
= EFI_PCI_IO_PROTOCOL_GUID;
/** EFI device path protocol GUID */
static EFI_GUID efi_device_path_protocol_guid
= EFI_DEVICE_PATH_PROTOCOL_GUID;
/** EFI PCI devices */
static LIST_HEAD ( efi_pci_devices );
/**
* Create EFI PCI device
* Open EFI PCI device
*
* @v device EFI device
* @v device EFI device handle
* @v attributes Protocol opening attributes
* @v efipci EFI PCI device to fill in
* @v pci PCI device to fill in
* @ret rc Return status code
*/
int efipci_create ( EFI_HANDLE device, UINT32 attributes,
struct efi_pci_device **efipci ) {
int efipci_open ( EFI_HANDLE device, UINT32 attributes,
struct pci_device *pci ) {
EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
union {
EFI_PCI_IO_PROTOCOL *pci_io;
void *interface;
} pci_io;
union {
EFI_DEVICE_PATH_PROTOCOL *path;
void *interface;
} path;
UINTN pci_segment, pci_bus, pci_dev, pci_fn;
EFI_STATUS efirc;
int rc;
/* Allocate PCI device */
*efipci = zalloc ( sizeof ( **efipci ) );
if ( ! *efipci ) {
rc = -ENOMEM;
goto err_zalloc;
}
(*efipci)->device = device;
/* See if device is a PCI device */
if ( ( efirc = bs->OpenProtocol ( device,
&efi_pci_io_protocol_guid,
&pci_io.interface,
efi_image_handle,
if ( ( efirc = bs->OpenProtocol ( device, &efi_pci_io_protocol_guid,
&pci_io.interface, efi_image_handle,
device, attributes ) ) != 0 ) {
rc = -EEFI_PCI ( efirc );
DBGCP ( device, "EFIPCI %p %s cannot open PCI protocols: %s\n",
@ -174,16 +153,14 @@ int efipci_create ( EFI_HANDLE device, UINT32 attributes,
strerror ( rc ) );
goto err_open_protocol;
}
(*efipci)->pci_io = pci_io.pci_io;
/* Get PCI bus:dev.fn address */
if ( ( efirc = pci_io.pci_io->GetLocation ( pci_io.pci_io,
&pci_segment,
if ( ( efirc = pci_io.pci_io->GetLocation ( pci_io.pci_io, &pci_segment,
&pci_bus, &pci_dev,
&pci_fn ) ) != 0 ) {
rc = -EEFI ( efirc );
DBGC ( device, "EFIPCI %p %s could not get PCI location: "
"%s\n", device, efi_handle_devpath_text ( device ),
DBGC ( device, "EFIPCI %p %s could not get PCI location: %s\n",
device, efi_handle_devpath_text ( device ),
strerror ( rc ) );
goto err_get_location;
}
@ -192,174 +169,74 @@ int efipci_create ( EFI_HANDLE device, UINT32 attributes,
( ( unsigned long ) pci_segment ), ( ( unsigned long ) pci_bus),
( ( unsigned long ) pci_dev ), ( ( unsigned long ) pci_fn ) );
/* Populate PCI device */
pci_init ( &(*efipci)->pci, PCI_BUSDEVFN ( pci_bus, pci_dev, pci_fn ) );
if ( ( rc = pci_read_config ( &(*efipci)->pci ) ) != 0 ) {
DBGC ( device, "EFIPCI %p %s cannot read PCI configuration: "
"%s\n", device, efi_handle_devpath_text ( device ),
strerror ( rc ) );
goto err_pci_read_config;
}
/* Retrieve device path */
if ( ( efirc = bs->OpenProtocol ( device,
&efi_device_path_protocol_guid,
&path.interface, efi_image_handle,
device, attributes ) ) != 0 ) {
rc = -EEFI ( efirc );
DBGC ( device, "EFIPCI %p %s has no device path\n",
device, efi_handle_devpath_text ( device ) );
goto err_no_device_path;
}
(*efipci)->path = path.path;
/* Add to list of PCI devices */
list_add ( &(*efipci)->list, &efi_pci_devices );
return 0;
bs->CloseProtocol ( device, &efi_device_path_protocol_guid,
efi_image_handle, device );
err_no_device_path:
err_pci_read_config:
err_get_location:
bs->CloseProtocol ( device, &efi_pci_io_protocol_guid,
efi_image_handle, device );
err_open_protocol:
free ( *efipci );
err_zalloc:
return rc;
}
/**
* Enable EFI PCI device
*
* @v efipci EFI PCI device
* @ret rc Return status code
*/
int efipci_enable ( struct efi_pci_device *efipci ) {
EFI_PCI_IO_PROTOCOL *pci_io = efipci->pci_io;
/* Try to enable I/O cycles, memory cycles, and bus mastering.
* Some platforms will 'helpfully' report errors if these bits
* can't be enabled (for example, if the card doesn't actually
* support I/O cycles). Work around any such platforms by
* enabling bits individually and simply ignoring any errors.
*/
pci_io->Attributes ( pci_io, EfiPciIoAttributeOperationEnable,
EFI_PCI_IO_ATTRIBUTE_IO, NULL );
pci_io->Attributes ( pci_io, EfiPciIoAttributeOperationEnable,
EFI_PCI_IO_ATTRIBUTE_MEMORY, NULL );
pci_io->Attributes ( pci_io, EfiPciIoAttributeOperationEnable,
EFI_PCI_IO_ATTRIBUTE_BUS_MASTER, NULL );
pci_io.pci_io->Attributes ( pci_io.pci_io,
EfiPciIoAttributeOperationEnable,
EFI_PCI_IO_ATTRIBUTE_IO, NULL );
pci_io.pci_io->Attributes ( pci_io.pci_io,
EfiPciIoAttributeOperationEnable,
EFI_PCI_IO_ATTRIBUTE_MEMORY, NULL );
pci_io.pci_io->Attributes ( pci_io.pci_io,
EfiPciIoAttributeOperationEnable,
EFI_PCI_IO_ATTRIBUTE_BUS_MASTER, NULL );
/* Populate PCI device */
pci_init ( pci, PCI_BUSDEVFN ( pci_bus, pci_dev, pci_fn ) );
if ( ( rc = pci_read_config ( pci ) ) != 0 ) {
DBGC ( device, "EFIPCI %p %s cannot read PCI configuration: "
"%s\n", device, efi_handle_devpath_text ( device ),
strerror ( rc ) );
goto err_pci_read_config;
}
return 0;
err_pci_read_config:
err_get_location:
bs->CloseProtocol ( device, &efi_pci_io_protocol_guid,
efi_image_handle, device );
err_open_protocol:
return rc;
}
/**
* Find EFI PCI device by EFI device
* Close EFI PCI device
*
* @v device EFI device
* @ret efipci EFI PCI device, or NULL
* @v device EFI device handle
*/
struct efi_pci_device * efipci_find_efi ( EFI_HANDLE device ) {
struct efi_pci_device *efipci;
list_for_each_entry ( efipci, &efi_pci_devices, list ) {
if ( efipci->device == device )
return efipci;
}
return NULL;
}
/**
* Find EFI PCI device by iPXE device
*
* @v dev Device
* @ret efipci EFI PCI device, or NULL
*/
struct efi_pci_device * efipci_find ( struct device *dev ) {
struct efi_pci_device *efipci;
list_for_each_entry ( efipci, &efi_pci_devices, list ) {
if ( &efipci->pci.dev == dev )
return efipci;
}
return NULL;
}
/**
* Add EFI device as child of EFI PCI device
*
* @v efipci EFI PCI device
* @v device EFI child device
* @ret efirc EFI status code
*/
int efipci_child_add ( struct efi_pci_device *efipci, EFI_HANDLE device ) {
void efipci_close ( EFI_HANDLE device ) {
EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
union {
EFI_PCI_IO_PROTOCOL *pci_io;
void *interface;
} pci_io;
EFI_STATUS efirc;
bs->CloseProtocol ( device, &efi_pci_io_protocol_guid,
efi_image_handle, device );
}
/**
* Get EFI PCI device information
*
* @v device EFI device handle
* @v pci PCI device to fill in
* @ret rc Return status code
*/
int efipci_info ( EFI_HANDLE device, struct pci_device *pci ) {
int rc;
/* Re-open the PCI_IO_PROTOCOL */
if ( ( efirc = bs->OpenProtocol ( efipci->device,
&efi_pci_io_protocol_guid,
&pci_io.interface,
efi_image_handle, device,
EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
) ) != 0 ) {
rc = -EEFI ( efirc );
DBGC ( efipci->device, "EFIPCI %p %s could not add child",
efipci->device, efi_devpath_text ( efipci->path ) );
DBGC ( efipci->device, " %p %s: %s\n", device,
efi_handle_devpath_text ( device ), strerror ( rc ) );
/* Open PCI device, if possible */
if ( ( rc = efipci_open ( device, EFI_OPEN_PROTOCOL_GET_PROTOCOL,
pci ) ) != 0 )
return rc;
}
DBGC2 ( efipci->device, "EFIPCI %p %s added child",
efipci->device, efi_devpath_text ( efipci->path ) );
DBGC2 ( efipci->device, " %p %s\n",
device, efi_handle_devpath_text ( device ) );
/* Close PCI device */
efipci_close ( device );
return 0;
}
/**
* Remove EFI device as child of PCI device
*
* @v efipci EFI PCI device
* @v device EFI child device
* @ret efirc EFI status code
*/
void efipci_child_del ( struct efi_pci_device *efipci, EFI_HANDLE device ) {
EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
bs->CloseProtocol ( efipci->device, &efi_pci_io_protocol_guid,
efi_image_handle, device );
DBGC2 ( efipci->device, "EFIPCI %p %s removed child",
efipci->device, efi_devpath_text ( efipci->path ) );
DBGC2 ( efipci->device, " %p %s\n",
device, efi_handle_devpath_text ( device ) );
}
/**
* Destroy EFI PCI device
*
* @v efipci EFI PCI device
*/
void efipci_destroy ( struct efi_pci_device *efipci ) {
EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
list_del ( &efipci->list );
bs->CloseProtocol ( efipci->device, &efi_device_path_protocol_guid,
efi_image_handle, efipci->device );
bs->CloseProtocol ( efipci->device, &efi_pci_io_protocol_guid,
efi_image_handle, efipci->device );
free ( efipci );
}
/******************************************************************************
*
* EFI PCI driver
@ -370,125 +247,105 @@ void efipci_destroy ( struct efi_pci_device *efipci ) {
/**
* Check to see if driver supports a device
*
* @v device EFI device
* @v device EFI device handle
* @ret rc Return status code
*/
static int efipci_supported ( EFI_HANDLE device ) {
struct efi_pci_device *efipci;
struct pci_device pci;
int rc;
/* Do nothing if we are already driving this device */
efipci = efipci_find_efi ( device );
if ( efipci ) {
DBGCP ( device, "EFIPCI %p %s already started\n",
device, efi_devpath_text ( efipci->path ) );
rc = -EALREADY;
goto err_already_started;
}
/* Create temporary corresponding PCI device, if any */
if ( ( rc = efipci_create ( device, EFI_OPEN_PROTOCOL_GET_PROTOCOL,
&efipci ) ) != 0 )
goto err_create;
/* Get PCI device information */
if ( ( rc = efipci_info ( device, &pci ) ) != 0 )
return rc;
/* Look for a driver */
if ( ( rc = pci_find_driver ( &efipci->pci ) ) != 0 ) {
if ( ( rc = pci_find_driver ( &pci ) ) != 0 ) {
DBGCP ( device, "EFIPCI %p %s has no driver\n",
device, efi_devpath_text ( efipci->path ) );
goto err_no_driver;
device, efi_handle_devpath_text ( device ) );
return rc;
}
DBGC ( device, "EFIPCI %p %s has driver \"%s\"\n", device,
efi_devpath_text ( efipci->path ), efipci->pci.id->name );
/* Destroy temporary PCI device */
efipci_destroy ( efipci );
DBGC ( device, "EFIPCI %p %s has driver \"%s\"\n",
device, efi_handle_devpath_text ( device ), pci.id->name );
return 0;
err_no_driver:
efipci_destroy ( efipci );
err_create:
err_already_started:
return rc;
}
/**
* Attach driver to device
*
* @v device EFI device
* @v efidev EFI device
* @ret rc Return status code
*/
static int efipci_start ( EFI_HANDLE device ) {
struct efi_pci_device *efipci;
static int efipci_start ( struct efi_device *efidev ) {
EFI_HANDLE device = efidev->device;
struct pci_device *pci;
int rc;
/* Do nothing if we are already driving this device */
efipci = efipci_find_efi ( device );
if ( efipci ) {
DBGCP ( device, "EFIPCI %p %s already started\n",
device, efi_devpath_text ( efipci->path ) );
rc = -EALREADY;
goto err_already_started;
/* Allocate PCI device */
pci = zalloc ( sizeof ( *pci ) );
if ( ! pci ) {
rc = -ENOMEM;
goto err_alloc;
}
/* Create corresponding PCI device */
if ( ( rc = efipci_create ( device, ( EFI_OPEN_PROTOCOL_BY_DRIVER |
EFI_OPEN_PROTOCOL_EXCLUSIVE ),
&efipci ) ) != 0 )
goto err_create;
/* Open PCI device */
if ( ( rc = efipci_open ( device, ( EFI_OPEN_PROTOCOL_BY_DRIVER |
EFI_OPEN_PROTOCOL_EXCLUSIVE ),
pci ) ) != 0 ) {
DBGC ( device, "EFIPCI %p %s could not open PCI device: %s\n",
device, efi_devpath_text ( efidev->path ),
strerror ( rc ) );
goto err_open;
}
/* Find driver */
if ( ( rc = pci_find_driver ( &efipci->pci ) ) != 0 ) {
if ( ( rc = pci_find_driver ( pci ) ) != 0 ) {
DBGC ( device, "EFIPCI %p %s has no driver\n",
device, efi_devpath_text ( efipci->path ) );
device, efi_devpath_text ( efidev->path ) );
goto err_find_driver;
}
/* Enable PCI device */
if ( ( rc = efipci_enable ( efipci ) ) != 0 )
goto err_enable;
/* Mark PCI device as a child of the EFI device */
pci->dev.parent = &efidev->dev;
list_add ( &pci->dev.siblings, &efidev->dev.children );
/* Probe driver */
if ( ( rc = pci_probe ( &efipci->pci ) ) != 0 ) {
if ( ( rc = pci_probe ( pci ) ) != 0 ) {
DBGC ( device, "EFIPCI %p %s could not probe driver \"%s\": "
"%s\n", device, efi_devpath_text ( efipci->path ),
efipci->pci.id->name, strerror ( rc ) );
"%s\n", device, efi_devpath_text ( efidev->path ),
pci->id->name, strerror ( rc ) );
goto err_probe;
}
DBGC ( device, "EFIPCI %p %s using driver \"%s\"\n", device,
efi_devpath_text ( efipci->path ), efipci->pci.id->name );
efi_devpath_text ( efidev->path ), pci->id->name );
efidev_set_drvdata ( efidev, pci );
return 0;
pci_remove ( &efipci->pci );
pci_remove ( pci );
err_probe:
err_enable:
list_del ( &pci->dev.siblings );
err_find_driver:
efipci_destroy ( efipci );
err_create:
err_already_started:
efipci_close ( device );
err_open:
free ( pci );
err_alloc:
return rc;
}
/**
* Detach driver from device
*
* @v device EFI device
* @v efidev EFI device
*/
static void efipci_stop ( EFI_HANDLE device ) {
struct efi_pci_device *efipci;
static void efipci_stop ( struct efi_device *efidev ) {
struct pci_device *pci = efidev_get_drvdata ( efidev );
EFI_HANDLE device = efidev->device;
/* Find PCI device */
efipci = efipci_find_efi ( device );
if ( ! efipci )
return;
/* Remove device */
pci_remove ( &efipci->pci );
/* Delete EFI PCI device */
efipci_destroy ( efipci );
pci_remove ( pci );
list_del ( &pci->dev.siblings );
efipci_close ( device );
free ( pci );
}
/** EFI PCI driver */

65
src/interface/efi/efi_snp.c
View File

@ -27,10 +27,8 @@ FILE_LICENCE ( GPL2_OR_LATER );
#include <ipxe/netdevice.h>
#include <ipxe/iobuf.h>
#include <ipxe/in.h>
#include <ipxe/pci.h>
#include <ipxe/version.h>
#include <ipxe/efi/efi.h>
#include <ipxe/efi/efi_pci.h>
#include <ipxe/efi/efi_driver.h>
#include <ipxe/efi/efi_strings.h>
#include <ipxe/efi/efi_snp.h>
@ -348,7 +346,7 @@ efi_snp_station_address ( EFI_SIMPLE_NETWORK_PROTOCOL *snp, BOOLEAN reset,
/* MAC address changes take effect only on netdev_open() */
if ( netdev_is_open ( snpdev->netdev ) ) {
DBGC ( snpdev, "SNPDEV %p MAC address changed while net "
"devive open\n", snpdev );
"device open\n", snpdev );
}
return 0;
@ -922,7 +920,7 @@ static struct efi_snp_device * efi_snp_demux ( struct net_device *netdev ) {
*/
static int efi_snp_probe ( struct net_device *netdev ) {
EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
struct efi_pci_device *efipci;
struct efi_device *efidev;
struct efi_snp_device *snpdev;
EFI_DEVICE_PATH_PROTOCOL *path_end;
MAC_ADDR_DEVICE_PATH *macpath;
@ -930,18 +928,18 @@ static int efi_snp_probe ( struct net_device *netdev ) {
EFI_STATUS efirc;
int rc;
/* Find EFI PCI device */
efipci = efipci_find ( netdev->dev );
if ( ! efipci ) {
DBG ( "SNP skipping non-PCI device %s\n", netdev->name );
/* Find parent EFI device */
efidev = efidev_parent ( netdev->dev );
if ( ! efidev ) {
DBG ( "SNP skipping non-EFI device %s\n", netdev->name );
rc = 0;
goto err_no_pci;
goto err_no_efidev;
}
/* Calculate device path prefix length */
path_end = efi_devpath_end ( efipci->path );
path_end = efi_devpath_end ( efidev->path );
path_prefix_len = ( ( ( void * ) path_end ) -
( ( void * ) efipci->path ) );
( ( void * ) efidev->path ) );
/* Allocate the SNP device */
snpdev = zalloc ( sizeof ( *snpdev ) + path_prefix_len +
@ -951,7 +949,7 @@ static int efi_snp_probe ( struct net_device *netdev ) {
goto err_alloc_snp;
}
snpdev->netdev = netdev_get ( netdev );
snpdev->efipci = efipci;
snpdev->efidev = efidev;
/* Sanity check */
if ( netdev->ll_protocol->ll_addr_len > sizeof ( EFI_MAC_ADDRESS ) ) {
@ -1009,7 +1007,7 @@ static int efi_snp_probe ( struct net_device *netdev ) {
"%s", netdev->name );
/* Populate the device path */
memcpy ( &snpdev->path, efipci->path, path_prefix_len );
memcpy ( &snpdev->path, efidev->path, path_prefix_len );
macpath = ( ( ( void * ) &snpdev->path ) + path_prefix_len );
path_end = ( ( void * ) ( macpath + 1 ) );
memset ( macpath, 0, sizeof ( *macpath ) );
@ -1040,12 +1038,12 @@ static int efi_snp_probe ( struct net_device *netdev ) {
goto err_install_protocol_interface;
}
/* Add as child of PCI device */
if ( ( rc = efipci_child_add ( efipci, snpdev->handle ) ) != 0 ) {
DBGC ( snpdev, "SNPDEV %p could not become child of " PCI_FMT
": %s\n", snpdev, PCI_ARGS ( &efipci->pci ),
strerror ( rc ) );
goto err_efipci_child_add;
/* Add as child of EFI parent device */
if ( ( rc = efidev_child_add ( efidev, snpdev->handle ) ) != 0 ) {
DBGC ( snpdev, "SNPDEV %p could not become child of %p %s: "
"%s\n", snpdev, efidev->device,
efi_devpath_text ( efidev->path ), strerror ( rc ) );
goto err_efidev_child_add;
}
/* Install HII */
@ -1058,14 +1056,15 @@ static int efi_snp_probe ( struct net_device *netdev ) {
/* Add to list of SNP devices */
list_add ( &snpdev->list, &efi_snp_devices );
DBGC ( snpdev, "SNPDEV %p installed for %s as device %p\n",
snpdev, netdev->name, snpdev->handle );
DBGC ( snpdev, "SNPDEV %p installed for %s as device %p %s\n",
snpdev, netdev->name, snpdev->handle,
efi_devpath_text ( &snpdev->path ) );
return 0;
efi_snp_hii_uninstall ( snpdev );
err_hii_install:
efipci_child_del ( efipci, snpdev->handle );
err_efipci_child_add:
efidev_child_del ( efidev, snpdev->handle );
err_efidev_child_add:
bs->UninstallMultipleProtocolInterfaces (
snpdev->handle,
&efi_simple_network_protocol_guid, &snpdev->snp,
@ -1082,7 +1081,7 @@ static int efi_snp_probe ( struct net_device *netdev ) {
netdev_put ( netdev );
free ( snpdev );
err_alloc_snp:
err_no_pci:
err_no_efidev:
return rc;
}
@ -1129,7 +1128,7 @@ static void efi_snp_remove ( struct net_device *netdev ) {
/* Uninstall the SNP */
efi_snp_hii_uninstall ( snpdev );
efipci_child_del ( snpdev->efipci, snpdev->handle );
efidev_child_del ( snpdev->efidev, snpdev->handle );
list_del ( &snpdev->list );
bs->UninstallMultipleProtocolInterfaces (
snpdev->handle,
@ -1153,6 +1152,22 @@ struct net_driver efi_snp_driver __net_driver = {
.remove = efi_snp_remove,
};
/**
* Find SNP device by EFI device handle
*
* @v handle EFI device handle
* @ret snpdev SNP device, or NULL
*/
struct efi_snp_device * find_snpdev ( EFI_HANDLE handle ) {
struct efi_snp_device *snpdev;
list_for_each_entry ( snpdev, &efi_snp_devices, list ) {
if ( snpdev->handle == handle )
return snpdev;
}
return NULL;
}
/**
* Get most recently opened SNP device
*