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Add PXE driver-scanning code, capable of locating all PXE ROMs in a system

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and matching them up to (e.g. PCI) devices.
This commit is contained in:
Michael Brown
2007-01-05 01:52:06 +00:00
parent ef50ea0b2b
commit 0638945c7e
2 changed files with 336 additions and 2 deletions
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115
src/include/pxe.h
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@@ -62,6 +62,113 @@ union u_PXENV_ANY {
typedef union u_PXENV_ANY PXENV_ANY_t;
/** An UNDI expansion ROM */
struct undi_rom {
/** Signature
*
* Must be equal to @c ROM_SIGNATURE
*/
UINT16_t Signature;
/** ROM length in 512-byte blocks */
UINT8_t ROMLength;
/** Unused */
UINT8_t unused[0x13];
/** Offset of the PXE ROM ID structure */
UINT16_t PXEROMID;
/** Offset of the PCI ROM structure */
UINT16_t PCIRHeader;
} PACKED;
/** Signature for an expansion ROM */
#define ROM_SIGNATURE 0xaa55
/** An UNDI ROM ID structure */
struct undi_rom_id {
/** Signature
*
* Must be equal to @c UNDI_ROM_ID_SIGNATURE
*/
UINT32_t Signature;
/** Length of structure */
UINT8_t StructLength;
/** Checksum */
UINT8_t StructCksum;
/** Structure revision
*
* Must be zero.
*/
UINT8_t StructRev;
/** UNDI revision
*
* Version 2.1.0 is encoded as the byte sequence 0x00, 0x01, 0x02.
*/
UINT8_t UNDIRev[3];
/** Offset to UNDI loader */
UINT16_t UNDILoader;
/** Minimum required stack segment size */
UINT16_t StackSize;
/** Minimum required data segment size */
UINT16_t DataSize;
/** Minimum required code segment size */
UINT16_t CodeSize;
} PACKED;
/** Signature for an UNDI ROM ID structure */
#define UNDI_ROM_ID_SIGNATURE \
( ( 'U' << 0 ) + ( 'N' << 8 ) + ( 'D' << 16 ) + ( 'I' << 24 ) )
/** A PCI expansion header */
struct pcir_header {
/** Signature
*
* Must be equal to @c PCIR_SIGNATURE
*/
uint32_t signature;
/** PCI vendor ID */
uint16_t vendor_id;
/** PCI device ID */
uint16_t device_id;
} PACKED;
/** Signature for an UNDI ROM ID structure */
#define PCIR_SIGNATURE \
( ( 'P' << 0 ) + ( 'C' << 8 ) + ( 'I' << 16 ) + ( 'R' << 24 ) )
/** A PXE PCI device ID */
struct pxe_pci_device_id {
/** PCI vendor ID */
unsigned int vendor_id;
/** PCI device ID */
unsigned int device_id;
};
/** A PXE device ID */
union pxe_device_id {
/** PCI device ID */
struct pxe_pci_device_id pci;
};
/** A PXE driver */
struct pxe_driver {
/** List of PXE drivers */
struct list_head list;
/** ROM segment address */
unsigned int rom_segment;
/** UNDI loader entry point */
SEGOFF16_t loader;
/** Code segment size */
size_t code_size;
/** Data segment size */
size_t data_size;
/** Bus type
*
* Values are as used by @c PXENV_UNDI_GET_NIC_TYPE
*/
unsigned int bus_type;
/** Device ID */
union pxe_device_id bus_id;
};
/** A PXE device */
struct pxe_device {
/** Generic device */
@@ -83,8 +190,8 @@ struct pxe_device {
MAC_ADDR_t hwaddr;
/** Assigned IRQ number */
UINT16_t irq;
/** ROM address */
SEGSEL_t rom;
/** ROM segment address */
SEGSEL_t rom_segment;
};
/**
@@ -112,6 +219,10 @@ extern int pxe_call ( struct pxe_device *pxe, unsigned int function,
extern int undi_probe ( struct pxe_device *pxe );
extern void undi_remove ( struct pxe_device *pxe );
extern struct pxe_driver * pxedrv_find_pci_driver ( unsigned int vendor_id,
unsigned int device_id,
unsigned int rombase );
extern struct net_device *pxe_netdev;
#endif /* PXE_H */