mirror of
https://github.com/xcat2/xNBA.git
synced 2025-02-09 15:23:30 +00:00
Move pxe_netdev and set_pxe_netdev to pxe_undi.c and remove
now-obsolete pxe.c.
This commit is contained in:
Michael Brown
parent
fd86c819ba
commit
5ce5e6d846
@ -1,182 +0,0 @@
|
||||
/** @file
|
||||
*
|
||||
*
|
||||
*
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (C) 2004 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., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||
*/
|
||||
|
||||
#include <gpxe/netdevice.h>
|
||||
#include "pxe.h"
|
||||
|
||||
struct net_device *pxe_netdev = NULL;
|
||||
|
||||
/**
|
||||
* Set network device as current PXE network device
|
||||
*
|
||||
* @v netdev Network device, or NULL
|
||||
*/
|
||||
void pxe_set_netdev ( struct net_device *netdev ) {
|
||||
if ( pxe_netdev )
|
||||
netdev_put ( pxe_netdev );
|
||||
pxe_netdev = NULL;
|
||||
if ( netdev )
|
||||
pxe_netdev = netdev_get ( netdev );
|
||||
}
|
||||
|
||||
#if 0
|
||||
|
||||
/* Global pointer to currently installed PXE stack */
|
||||
pxe_stack_t *pxe_stack = NULL;
|
||||
|
||||
/* Various startup/shutdown routines. The startup/shutdown call
|
||||
* sequence is incredibly badly defined in the Intel PXE spec, for
|
||||
* example:
|
||||
*
|
||||
* PXENV_UNDI_INITIALIZE says that the parameters used to initialize
|
||||
* the adaptor should be those supplied to the most recent
|
||||
* PXENV_UNDI_STARTUP call. PXENV_UNDI_STARTUP takes no parameters.
|
||||
*
|
||||
* PXENV_UNDI_CLEANUP says that the rest of the API will not be
|
||||
* available after making this call. Figure 3-3 ("Early UNDI API
|
||||
* usage") shows a call to PXENV_UNDI_CLEANUP being followed by a
|
||||
* call to the supposedly now unavailable PXENV_STOP_UNDI.
|
||||
*
|
||||
* PXENV_UNLOAD_BASE_STACK talks about freeing up the memory
|
||||
* occupied by the PXE stack. Figure 4-3 ("PXE IPL") shows a call
|
||||
* to PXENV_STOP_UNDI being made after the call to
|
||||
* PXENV_UNLOAD_BASE_STACK, by which time the entire PXE stack
|
||||
* should have been freed (and, potentially, zeroed).
|
||||
*
|
||||
* Nothing, anywhere, seems to mention who's responsible for freeing
|
||||
* up the base memory allocated for the stack segment. It's not
|
||||
* even clear whether or not this is expected to be in free base
|
||||
* memory rather than claimed base memory.
|
||||
*
|
||||
* Consequently, we adopt a rather defensive strategy, designed to
|
||||
* work with any conceivable sequence of initialisation or shutdown
|
||||
* calls. We have only two things that we care about:
|
||||
*
|
||||
* 1. Have we hooked INT 1A and INT 15,E820(etc.)?
|
||||
* 2. Is the NIC initialised?
|
||||
*
|
||||
* The NIC should never be initialised without the vectors being
|
||||
* hooked, similarly the vectors should never be unhooked with the NIC
|
||||
* still initialised. We do, however, want to be able to have the
|
||||
* vectors hooked with the NIC shutdown. We therefore have three
|
||||
* possible states:
|
||||
*
|
||||
* 1. Ready to unload: interrupts unhooked, NIC shutdown.
|
||||
* 2. Midway: interrupts hooked, NIC shutdown.
|
||||
* 3. Fully ready: interrupts hooked, NIC initialised.
|
||||
*
|
||||
* We provide the three states CAN_UNLOAD, MIDWAY and READY to define
|
||||
* these, and the call pxe_ensure_state() to ensure that the stack is
|
||||
* in the specified state. All our PXE API call implementations
|
||||
* should use this call to ensure that the state is as required for
|
||||
* that PXE API call. This enables us to cope with whatever the
|
||||
* end-user's interpretation of the PXE spec may be. It even allows
|
||||
* for someone calling e.g. PXENV_START_UNDI followed by
|
||||
* PXENV_UDP_WRITE, without bothering with any of the intervening
|
||||
* calls.
|
||||
*
|
||||
* pxe_ensure_state() returns 1 for success, 0 for failure. In the
|
||||
* event of failure (which can arise from e.g. asking for state READY
|
||||
* when we don't know where our NIC is), the error code
|
||||
* PXENV_STATUS_UNDI_INVALID_STATE should be returned to the user.
|
||||
* The macros ENSURE_XXX() can be used to achieve this without lots of
|
||||
* duplicated code.
|
||||
*/
|
||||
|
||||
/* pxe_[un]hook_stack are architecture-specific and provided in
|
||||
* pxe_callbacks.c
|
||||
*/
|
||||
|
||||
int pxe_initialise_nic ( void ) {
|
||||
if ( pxe_stack->state >= READY ) return 1;
|
||||
|
||||
#warning "device probing mechanism has completely changed"
|
||||
#if 0
|
||||
|
||||
/* Check if NIC is initialised. dev.disable is set to 0
|
||||
* when disable() is called, so we use this.
|
||||
*/
|
||||
if ( dev.disable ) {
|
||||
/* NIC may have been initialised independently
|
||||
* (e.g. when we set up the stack prior to calling the
|
||||
* NBP).
|
||||
*/
|
||||
pxe_stack->state = READY;
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* If we already have a NIC defined, reuse that one with
|
||||
* PROBE_AWAKE. If one was specifed via PXENV_START_UNDI, try
|
||||
* that one first. Otherwise, set PROBE_FIRST.
|
||||
*/
|
||||
|
||||
if ( dev.state.pci.dev.use_specified == 1 ) {
|
||||
dev.how_probe = PROBE_NEXT;
|
||||
DBG ( " initialising NIC specified via START_UNDI" );
|
||||
} else if ( dev.state.pci.dev.driver ) {
|
||||
DBG ( " reinitialising NIC" );
|
||||
dev.how_probe = PROBE_AWAKE;
|
||||
} else {
|
||||
DBG ( " probing for any NIC" );
|
||||
dev.how_probe = PROBE_FIRST;
|
||||
}
|
||||
|
||||
/* Call probe routine to bring up the NIC */
|
||||
if ( eth_probe ( &dev ) != PROBE_WORKED ) {
|
||||
DBG ( " failed" );
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
|
||||
pxe_stack->state = READY;
|
||||
return 1;
|
||||
}
|
||||
|
||||
int pxe_shutdown_nic ( void ) {
|
||||
if ( pxe_stack->state <= MIDWAY ) return 1;
|
||||
|
||||
eth_irq ( DISABLE );
|
||||
disable ( &dev );
|
||||
pxe_stack->state = MIDWAY;
|
||||
return 1;
|
||||
}
|
||||
|
||||
int ensure_pxe_state ( pxe_stack_state_t wanted ) {
|
||||
int success = 1;
|
||||
|
||||
if ( ! pxe_stack ) return 0;
|
||||
if ( wanted >= MIDWAY )
|
||||
success = success & hook_pxe_stack();
|
||||
if ( wanted > MIDWAY ) {
|
||||
success = success & pxe_initialise_nic();
|
||||
} else {
|
||||
success = success & pxe_shutdown_nic();
|
||||
}
|
||||
if ( wanted < MIDWAY )
|
||||
success = success & unhook_pxe_stack();
|
||||
return success;
|
||||
}
|
||||
|
||||
#endif
|
||||
@ -48,6 +48,21 @@
|
||||
*/
|
||||
static int undi_tx_count = 0;
|
||||
|
||||
struct net_device *pxe_netdev = NULL;
|
||||
|
||||
/**
|
||||
* Set network device as current PXE network device
|
||||
*
|
||||
* @v netdev Network device, or NULL
|
||||
*/
|
||||
void pxe_set_netdev ( struct net_device *netdev ) {
|
||||
if ( pxe_netdev )
|
||||
netdev_put ( pxe_netdev );
|
||||
pxe_netdev = NULL;
|
||||
if ( netdev )
|
||||
pxe_netdev = netdev_get ( netdev );
|
||||
}
|
||||
|
||||
/**
|
||||
* Open PXE network device
|
||||
*
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user