1 files changed, 0 insertions, 226 deletions
diff --git a/qemu/roms/ipxe/src/net/retry.c b/qemu/roms/ipxe/src/net/retry.c
deleted file mode 100644
index 734567be5..000000000
--- a/qemu/roms/ipxe/src/net/retry.c
+++ /dev/null
@@ -1,226 +0,0 @@
-/*
- * Copyright (C) 2006 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.
- *
- * You can also choose to distribute this program under the terms of
- * the Unmodified Binary Distribution Licence (as given in the file
- * COPYING.UBDL), provided that you have satisfied its requirements.
- */
-
-FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
-
-#include <stddef.h>
-#include <ipxe/timer.h>
-#include <ipxe/list.h>
-#include <ipxe/process.h>
-#include <ipxe/init.h>
-#include <ipxe/retry.h>
-
-/** @file
- *
- * Retry timers
- *
- * A retry timer is a binary exponential backoff timer.  It can be
- * used to build automatic retransmission into network protocols.
- *
- * This implementation of the timer is designed to satisfy RFC 2988
- * and therefore be usable as a TCP retransmission timer.
- * 
- */
-
-/* The theoretical minimum that the algorithm in stop_timer() can
- * adjust the timeout back down to is seven ticks, so set the minimum
- * timeout to at least that value for the sake of consistency.
- */
-#define MIN_TIMEOUT 7
-
-/** List of running timers */
-static LIST_HEAD ( timers );
-
-/**
- * Start timer with a specified timeout
- *
- * @v timer		Retry timer
- * @v timeout		Timeout, in ticks
- *
- * This starts the timer running with the specified timeout value.  If
- * stop_timer() is not called before the timer expires, the timer will
- * be stopped and the timer's callback function will be called.
- */
-void start_timer_fixed ( struct retry_timer *timer, unsigned long timeout ) {
-
-	/* Add to list of running timers (if applicable) */
-	if ( ! timer->running ) {
-		list_add ( &timer->list, &timers );
-		ref_get ( timer->refcnt );
-		timer->running = 1;
-	}
-
-	/* Record start time */
-	timer->start = currticks();
-
-	/* Record timeout */
-	timer->timeout = timeout;
-
-	DBGC2 ( timer, "Timer %p started at time %ld (expires at %ld)\n",
-		timer, timer->start, ( timer->start + timer->timeout ) );
-}
-
-/**
- * Start timer
- *
- * @v timer		Retry timer
- *
- * This starts the timer running with the current timeout value
- * (rounded up to the minimum timeout value).  If stop_timer() is not
- * called before the timer expires, the timer will be stopped and the
- * timer's callback function will be called.
- */
-void start_timer ( struct retry_timer *timer ) {
-	unsigned long timeout = timer->timeout;
-	unsigned long min;
-
-	/* Calculate minimum timeout */
-	min = ( timer->min ? timer->min : DEFAULT_MIN_TIMEOUT );
-	if ( min < MIN_TIMEOUT )
-		min = MIN_TIMEOUT;
-
-	/* Ensure timeout is at least the minimum */
-	if ( timeout < min )
-		timeout = min;
-
-	/* Start timer with this timeout */
-	start_timer_fixed ( timer, timeout );
-}
-
-/**
- * Stop timer
- *
- * @v timer		Retry timer
- *
- * This stops the timer and updates the timer's timeout value.
- */
-void stop_timer ( struct retry_timer *timer ) {
-	unsigned long old_timeout = timer->timeout;
-	unsigned long now = currticks();
-	unsigned long runtime;
-
-	/* If timer was already stopped, do nothing */
-	if ( ! timer->running )
-		return;
-
-	list_del ( &timer->list );
-	runtime = ( now - timer->start );
-	timer->running = 0;
-	DBGC2 ( timer, "Timer %p stopped at time %ld (ran for %ld)\n",
-		timer, now, runtime );
-
-	/* Update timer.  Variables are:
-	 *
-	 *   r = round-trip time estimate (i.e. runtime)
-	 *   t = timeout value (i.e. timer->timeout)
-	 *   s = smoothed round-trip time
-	 *
-	 * By choice, we set t = 4s, i.e. allow for four times the
-	 * normal round-trip time to pass before retransmitting.
-	 *
-	 * We want to smooth according to s := ( 7 s + r ) / 8
-	 *
-	 * Since we don't actually store s, this reduces to
-	 * t := ( 7 t / 8 ) + ( r / 2 )
-	 *
-	 */
-	if ( timer->count ) {
-		timer->count--;
-	} else {
-		timer->timeout -= ( timer->timeout >> 3 );
-		timer->timeout += ( runtime >> 1 );
-		if ( timer->timeout != old_timeout ) {
-			DBGC ( timer, "Timer %p timeout updated to %ld\n",
-			       timer, timer->timeout );
-		}
-	}
-
-	ref_put ( timer->refcnt );
-}
-
-/**
- * Handle expired timer
- *
- * @v timer		Retry timer
- */
-static void timer_expired ( struct retry_timer *timer ) {
-	struct refcnt *refcnt = timer->refcnt;
-	unsigned long max = ( timer->max ? timer->max : DEFAULT_MAX_TIMEOUT );
-	int fail;
-
-	/* Stop timer without performing RTT calculations */
-	DBGC2 ( timer, "Timer %p stopped at time %ld on expiry\n",
-		timer, currticks() );
-	assert ( timer->running );
-	list_del ( &timer->list );
-	timer->running = 0;
-	timer->count++;
-
-	/* Back off the timeout value */
-	timer->timeout <<= 1;
-	if ( ( fail = ( timer->timeout > max ) ) )
-		timer->timeout = max;
-	DBGC ( timer, "Timer %p timeout backed off to %ld\n",
-	       timer, timer->timeout );
-
-	/* Call expiry callback */
-	timer->expired ( timer, fail );
-	/* If refcnt is NULL, then timer may already have been freed */
-
-	ref_put ( refcnt );
-}
-
-/**
- * Poll the retry timer list
- *
- */
-void retry_poll ( void ) {
-	struct retry_timer *timer;
-	unsigned long now = currticks();
-	unsigned long used;
-
-	/* Process at most one timer expiry.  We cannot process
-	 * multiple expiries in one pass, because one timer expiring
-	 * may end up triggering another timer's deletion from the
-	 * list.
-	 */
-	list_for_each_entry ( timer, &timers, list ) {
-		used = ( now - timer->start );
-		if ( used >= timer->timeout ) {
-			timer_expired ( timer );
-			break;
-		}
-	}
-}
-
-/**
- * Single-step the retry timer list
- *
- * @v process		Retry timer process
- */
-static void retry_step ( struct process *process __unused ) {
-	retry_poll();
-}
-
-/** Retry timer process */
-PERMANENT_PROCESS ( retry_process, retry_step );