mirror of
https://github.com/xcat2/xNBA.git
synced 2024-12-16 16:21:32 +00:00
15ee09ed10
Generic PCI code now handles 64-bit BARs correctly when setting "membase"; drivers should need to call pci_bar_start() only if they want to use BARs other than the first memory or I/O BAR. Split rarely-used PCI functions out into pciextra.c. Core PCI code is now 662 bytes (down from 1308 bytes in Etherboot 5.4). 284 bytes of this saving comes from the pci/pciextra split. Cosmetic changes to lots of drivers (e.g. vendor_id->vendor in order to match the names used in Linux).
423 lines
12 KiB
C
423 lines
12 KiB
C
/**************************************************************************
|
|
Etherboot - BOOTP/TFTP Bootstrap Program
|
|
Skeleton NIC driver for Etherboot
|
|
***************************************************************************/
|
|
|
|
/*
|
|
* 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, or (at
|
|
* your option) any later version.
|
|
*/
|
|
|
|
/* to get some global routines like printf */
|
|
#include "etherboot.h"
|
|
/* to get the interface to the body of the program */
|
|
#include "nic.h"
|
|
/* Drag in support for whichever bus(es) we want for this NIC */
|
|
#include <gpxe/pci.h>
|
|
#include "isa.h"
|
|
#include "eisa.h"
|
|
#include "isapnp.h"
|
|
#include "mca.h"
|
|
|
|
/*
|
|
* NIC specific static variables go here. Try to avoid using static
|
|
* variables wherever possible. In particular, the I/O address can
|
|
* always be accessed via nic->ioaddr.
|
|
*/
|
|
|
|
/*
|
|
* If you have large static variables (e.g. transmit and receive
|
|
* buffers), you should place them together in a single structure and
|
|
* mark the structure as "shared". This enables this space to be
|
|
* shared between drivers in multi-driver images, which can easily
|
|
* reduce the runtime size by 50%.
|
|
*
|
|
*/
|
|
#define SKEL_RX_BUFS 1
|
|
#define SKEL_TX_BUFS 1
|
|
#define SKEL_RX_BUFSIZE 0
|
|
#define SKEL_TX_BUFSIZE 0
|
|
struct skel_rx_desc {};
|
|
struct skel_tx_desc {};
|
|
struct {
|
|
struct skel_rx_desc rxd[SKEL_RX_BUFS];
|
|
unsigned char rxb[SKEL_RX_BUFS][SKEL_RX_BUFSIZE];
|
|
struct skel_tx_desc txd[SKEL_TX_BUFS];
|
|
unsigned char txb[SKEL_TX_BUFS][SKEL_TX_BUFSIZE];
|
|
} skel_bufs __shared;
|
|
|
|
/*
|
|
* Don't forget to remove "__unused" from all the function parameters!
|
|
*
|
|
*/
|
|
|
|
/**************************************************************************
|
|
* CONNECT - Connect to the network
|
|
**************************************************************************
|
|
*/
|
|
static int skel_connect ( struct nic *nic __unused ) {
|
|
/*
|
|
* Connect to the network. For most NICs, this will probably
|
|
* be a no-op. For wireless NICs, this should be the point at
|
|
* which you attempt to join to an access point.
|
|
*
|
|
* Return 0 if the connection failed (e.g. no cable plugged
|
|
* in), 1 for success.
|
|
*
|
|
*/
|
|
return 1;
|
|
}
|
|
|
|
/**************************************************************************
|
|
* TRANSMIT - Transmit a frame
|
|
**************************************************************************
|
|
*/
|
|
static void skel_transmit ( struct nic *nic __unused,
|
|
const char *dest __unused,
|
|
unsigned int type __unused,
|
|
unsigned int size __unused,
|
|
const char *packet __unused ) {
|
|
/* Transmit packet to dest MAC address. You will need to
|
|
* construct the link-layer header (dest MAC, source MAC,
|
|
* type).
|
|
*/
|
|
/*
|
|
unsigned int nstype = htons ( type );
|
|
memcpy ( <tx_buffer>, dest, ETH_ALEN );
|
|
memcpy ( <tx_buffer> + ETH_ALEN, nic->node_addr, ETH_ALEN );
|
|
memcpy ( <tx_buffer> + 2 * ETH_ALEN, &nstype, 2 );
|
|
memcpy ( <tx_buffer> + ETH_HLEN, data, size );
|
|
<transmit_data> ( <tx_buffer>, size + ETH_HLEN );
|
|
*/
|
|
}
|
|
|
|
/**************************************************************************
|
|
* POLL - Wait for a frame
|
|
**************************************************************************
|
|
*/
|
|
static int skel_poll ( struct nic *nic __unused, int retrieve __unused ) {
|
|
/* Work out whether or not there's an ethernet packet ready to
|
|
* read. Return 0 if not.
|
|
*/
|
|
/*
|
|
if ( ! <packet_ready> ) return 0;
|
|
*/
|
|
|
|
/* retrieve==0 indicates that we are just checking for the
|
|
* presence of a packet but don't want to read it just yet.
|
|
*/
|
|
/*
|
|
if ( ! retrieve ) return 1;
|
|
*/
|
|
|
|
/* Copy data to nic->packet. Data should include the
|
|
* link-layer header (dest MAC, source MAC, type).
|
|
* Store length of data in nic->packetlen.
|
|
* Return true to indicate a packet has been read.
|
|
*/
|
|
/*
|
|
nic->packetlen = <packet_length>;
|
|
memcpy ( nic->packet, <packet_data>, <packet_length> );
|
|
return 1;
|
|
*/
|
|
|
|
return 0; /* Remove this line once this method is implemented */
|
|
}
|
|
|
|
/**************************************************************************
|
|
* IRQ - handle interrupts
|
|
**************************************************************************
|
|
*/
|
|
static void skel_irq ( struct nic *nic __unused, irq_action_t action ) {
|
|
/* This routine is somewhat optional. Etherboot itself
|
|
* doesn't use interrupts, but they are required under some
|
|
* circumstances when we're acting as a PXE stack.
|
|
*
|
|
* If you don't implement this routine, the only effect will
|
|
* be that your driver cannot be used via Etherboot's UNDI
|
|
* API. This won't affect programs that use only the UDP
|
|
* portion of the PXE API, such as pxelinux.
|
|
*/
|
|
|
|
switch ( action ) {
|
|
case DISABLE :
|
|
case ENABLE :
|
|
/* Set receive interrupt enabled/disabled state */
|
|
/*
|
|
outb ( action == ENABLE ? IntrMaskEnabled : IntrMaskDisabled,
|
|
nic->ioaddr + IntrMaskRegister );
|
|
*/
|
|
break;
|
|
case FORCE :
|
|
/* Force NIC to generate a receive interrupt */
|
|
/*
|
|
outb ( ForceInterrupt, nic->ioaddr + IntrForceRegister );
|
|
*/
|
|
break;
|
|
}
|
|
}
|
|
|
|
/**************************************************************************
|
|
* OPERATIONS TABLE - Pointers to all the above methods
|
|
**************************************************************************
|
|
*/
|
|
static struct nic_operations skel_operations = {
|
|
.connect = skel_connect,
|
|
.transmit = skel_transmit,
|
|
.poll = skel_poll,
|
|
.irq = skel_irq,
|
|
};
|
|
|
|
/**************************************************************************
|
|
* PROBE - Look for an adapter
|
|
*
|
|
* You need to define a probe routine and a disable routine for each
|
|
* bus type that your driver supports, together with tables that
|
|
* enable Etherboot to identify that your driver should be used for a
|
|
* particular device.
|
|
*
|
|
* Delete whichever of the following sections you don't need. For
|
|
* example, most PCI devices will only need the PCI probing section;
|
|
* ISAPnP, EISA, etc. can all be deleted.
|
|
*
|
|
* Some devices will need custom bus logic. The ISA 3c509 is a good
|
|
* example of this; it has a contention-resolution mechanism that is
|
|
* similar to ISAPnP, but not close enough to use the generic ISAPnP
|
|
* code. Look at 3c509.c to see how it works.
|
|
*
|
|
**************************************************************************
|
|
*/
|
|
|
|
/**************************************************************************
|
|
* PCI PROBE and DISABLE
|
|
**************************************************************************
|
|
*/
|
|
static int skel_pci_probe ( struct nic *nic, struct pci_device *pci ) {
|
|
|
|
pci_fill_nic ( nic, pci );
|
|
|
|
/* Test for physical presence of NIC */
|
|
/*
|
|
if ( ! my_tests ) {
|
|
DBG ( "Could not find NIC: my explanation\n" );
|
|
return 0;
|
|
}
|
|
*/
|
|
|
|
/* point to NIC specific routines */
|
|
nic->nic_op = &skel_operations;
|
|
return 1;
|
|
}
|
|
|
|
static void skel_pci_disable ( struct nic *nic __unused,
|
|
struct pci_device *pci __unused ) {
|
|
/* Reset the card to its initial state, disable DMA and
|
|
* interrupts
|
|
*/
|
|
}
|
|
|
|
static struct pci_device_id skel_pci_nics[] = {
|
|
PCI_ROM ( 0x0000, 0x0000, "skel-pci", "Skeleton PCI Adapter" ),
|
|
};
|
|
|
|
PCI_DRIVER ( skel_pci_driver, skel_pci_nics, PCI_NO_CLASS );
|
|
|
|
DRIVER ( "SKEL/PCI", nic_driver, pci_driver, skel_pci_driver,
|
|
skel_pci_probe, skel_pci_disable );
|
|
|
|
/**************************************************************************
|
|
* EISA PROBE and DISABLE
|
|
**************************************************************************
|
|
*/
|
|
static int skel_eisa_probe ( struct nic *nic, struct eisa_device *eisa ) {
|
|
|
|
eisa_fill_nic ( nic, eisa );
|
|
enable_eisa_device ( eisa );
|
|
nic->irqno = 0; /* No standard way to get irq from EISA cards */
|
|
|
|
/* Test for physical presence of NIC */
|
|
/*
|
|
if ( ! my_tests ) {
|
|
DBG ( "Could not find NIC: my explanation\n" );
|
|
return 0;
|
|
}
|
|
*/
|
|
|
|
/* point to NIC specific routines */
|
|
nic->nic_op = &skel_operations;
|
|
return 1;
|
|
}
|
|
|
|
static void skel_eisa_disable ( struct nic *nic __unused,
|
|
struct eisa_device *eisa ) {
|
|
/* Reset the card to its initial state, disable DMA and
|
|
* interrupts
|
|
*/
|
|
disable_eisa_device ( eisa );
|
|
}
|
|
|
|
static struct eisa_id skel_eisa_nics[] = {
|
|
{ "Skeleton EISA Adapter", EISA_VENDOR('S','K','L'), 0x0000 },
|
|
};
|
|
|
|
EISA_DRIVER ( skel_eisa_driver, skel_eisa_nics );
|
|
|
|
DRIVER ( "SKEL/EISA", nic_driver, eisa_driver, skel_eisa_driver,
|
|
skel_eisa_probe, skel_eisa_disable );
|
|
|
|
ISA_ROM ( "skel-eisa", "Skeleton EISA Adapter" );
|
|
|
|
/**************************************************************************
|
|
* ISAPnP PROBE and DISABLE
|
|
**************************************************************************
|
|
*/
|
|
static int skel_isapnp_probe ( struct nic *nic,
|
|
struct isapnp_device *isapnp ) {
|
|
|
|
isapnp_fill_nic ( nic, isapnp );
|
|
activate_isapnp_device ( isapnp );
|
|
|
|
/* Test for physical presence of NIC */
|
|
/*
|
|
if ( ! my_tests ) {
|
|
DBG ( "Could not find NIC: my explanation\n" );
|
|
return 0;
|
|
}
|
|
*/
|
|
|
|
/* point to NIC specific routines */
|
|
nic->nic_op = &skel_operations;
|
|
return 1;
|
|
}
|
|
|
|
static void skel_isapnp_disable ( struct nic *nic __unused,
|
|
struct isapnp_device *isapnp ) {
|
|
/* Reset the card to its initial state, disable DMA and
|
|
* interrupts
|
|
*/
|
|
deactivate_isapnp_device ( isapnp );
|
|
}
|
|
|
|
static struct isapnp_id skel_isapnp_nics[] = {
|
|
{ "Skeleton ISAPnP Adapter", ISAPNP_VENDOR('S','K','L'), 0x0000 },
|
|
};
|
|
|
|
ISAPNP_DRIVER ( skel_isapnp_driver, skel_isapnp_nics );
|
|
|
|
DRIVER ( "SKEL/ISAPnP", nic_driver, isapnp_driver, skel_isapnp_driver,
|
|
skel_isapnp_probe, skel_isapnp_disable );
|
|
|
|
ISA_ROM ( "skel-isapnp", "Skeleton ISAPnP Adapter" );
|
|
|
|
/**************************************************************************
|
|
* MCA PROBE and DISABLE
|
|
**************************************************************************
|
|
*/
|
|
static int skel_mca_probe ( struct nic *nic,
|
|
struct mca_device *mca ) {
|
|
|
|
mca_fill_nic ( nic, mca );
|
|
|
|
/* MCA parameters are available in the mca->pos[] array */
|
|
/*
|
|
nic->ioaddr = ( mca->pos[xxx] << 8 ) + mca->pos[yyy];
|
|
nic->irqno = mca->pos[zzz] & 0x0f;
|
|
*/
|
|
|
|
/* Test for physical presence of NIC */
|
|
/*
|
|
if ( ! my_tests ) {
|
|
DBG ( "Could not find NIC: my explanation\n" );
|
|
return 0;
|
|
}
|
|
*/
|
|
|
|
/* point to NIC specific routines */
|
|
nic->nic_op = &skel_operations;
|
|
return 1;
|
|
}
|
|
|
|
static void skel_mca_disable ( struct nic *nic __unused,
|
|
struct mca_device *mca __unused ) {
|
|
/* Reset the card to its initial state, disable DMA and
|
|
* interrupts
|
|
*/
|
|
}
|
|
|
|
static struct mca_id skel_mca_nics[] = {
|
|
{ "Skeleton MCA Adapter", 0x0000 },
|
|
};
|
|
|
|
MCA_DRIVER ( skel_mca_driver, skel_mca_nics );
|
|
|
|
DRIVER ( "SKEL/MCA", nic_driver, mca_driver, skel_mca_driver,
|
|
skel_mca_probe, skel_mca_disable );
|
|
|
|
ISA_ROM ( "skel-mca", "Skeleton MCA Adapter" );
|
|
|
|
/**************************************************************************
|
|
* ISA PROBE and DISABLE
|
|
*
|
|
* The "classical" ISA probe is split into two stages: trying a list
|
|
* of I/O addresses to see if there's anything listening, and then
|
|
* using that I/O address to fill in the information in the nic
|
|
* structure.
|
|
*
|
|
* The list of probe addresses defined in skel_isa_probe_addrs[] will
|
|
* be passed to skel_isa_probe_addr(). If skel_isa_probe_addr()
|
|
* returns true, a struct isa_device will be created with isa->ioaddr
|
|
* set to the working I/O address, and skel_isa_probe() will be
|
|
* called.
|
|
*
|
|
* There is a standard mechanism for overriding the probe address list
|
|
* using ISA_PROBE_ADDRS. Do not implement any custom code to
|
|
* override the probe address list.
|
|
*
|
|
**************************************************************************
|
|
*/
|
|
static int skel_isa_probe_addr ( isa_probe_addr_t ioaddr __unused ) {
|
|
return 0;
|
|
}
|
|
|
|
static int skel_isa_probe ( struct nic *nic, struct isa_device *isa ) {
|
|
|
|
isa_fill_nic ( nic, isa );
|
|
nic->irqno = 0; /* No standard way to get IRQ for ISA */
|
|
|
|
/* Test for physical presence of NIC */
|
|
/*
|
|
if ( ! my_tests ) {
|
|
DBG ( "Could not find NIC: my explanation\n" );
|
|
return 0;
|
|
}
|
|
*/
|
|
|
|
/* point to NIC specific routines */
|
|
nic->nic_op = &skel_operations;
|
|
return 1;
|
|
}
|
|
|
|
static void skel_isa_disable ( struct nic *nic __unused,
|
|
struct isa_device *isa __unused ) {
|
|
/* Reset the card to its initial state, disable DMA and
|
|
* interrupts
|
|
*/
|
|
}
|
|
|
|
static isa_probe_addr_t skel_isa_probe_addrs[] = {
|
|
/*
|
|
0x200, 0x240,
|
|
*/
|
|
};
|
|
|
|
ISA_DRIVER ( skel_isa_driver, skel_isa_probe_addrs, skel_isa_probe_addr,
|
|
ISA_VENDOR('S','K','L'), 0x0000 );
|
|
|
|
DRIVER ( "SKEL/ISA", nic_driver, isa_driver, skel_isa_driver,
|
|
skel_isa_probe, skel_isa_disable );
|
|
|
|
ISA_ROM ( "skel-isa", "Skeleton ISA Adapter" );
|
|
|