net: express the first argument to NetSetTimeout() in milliseconds

Enforce millisecond semantics of the first argument to NetSetTimeout() --
the change is transparent for well-behaving boards (CFG_HZ == 1000 and
get_timer() countiing in milliseconds).

Rationale for this patch is to enable millisecond granularity for
network-related timeouts, which is needed for the upcoming automatic
software update feature.

Summary of changes:
- do not scale the first argument to NetSetTimeout() by CFG_HZ
- change timeout values used in the networking code to milliseconds

Signed-off-by: Rafal Czubak <rcz@semihalf.com>
Signed-off-by: Bartlomiej Sieka <tur@semihalf.com>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>

net/bootp.c

@@ -33,7 +33,7 @@
 
 #if defined(CONFIG_CMD_NET)
 
-#define TIMEOUT		5UL		/* Seconds before trying BOOTP again	*/
+#define TIMEOUT		5000UL	/* Milliseconds before trying BOOTP again */
 #ifndef CONFIG_NET_RETRY_COUNT
 # define TIMEOUT_COUNT	5		/* # of timeouts before giving up  */
 #else
@@ -371,7 +371,7 @@ BootpTimeout(void)
 		puts ("\nRetry count exceeded; starting again\n");
 		NetStartAgain ();
 	} else {
-		NetSetTimeout (TIMEOUT * CFG_HZ, BootpTimeout);
+		NetSetTimeout (TIMEOUT, BootpTimeout);
 		BootpRequest ();
 	}
 }
@@ -671,7 +671,7 @@ BootpRequest (void)
 	bp->bp_htype = HWT_ETHER;
 	bp->bp_hlen = HWL_ETHER;
 	bp->bp_hops = 0;
-	bp->bp_secs = htons(get_timer(0) / CFG_HZ);
+	bp->bp_secs = htons(get_timer(0) / 1000);
 	NetWriteIP(&bp->bp_ciaddr, 0);
 	NetWriteIP(&bp->bp_yiaddr, 0);
 	NetWriteIP(&bp->bp_siaddr, 0);
@@ -688,7 +688,7 @@ BootpRequest (void)
 
 	/*
 	 *	Bootp ID is the lower 4 bytes of our ethernet address
-	 *	plus the current time in HZ.
+	 *	plus the current time in ms.
 	 */
 	BootpID = ((ulong)NetOurEther[2] << 24)
 		| ((ulong)NetOurEther[3] << 16)
@@ -705,7 +705,7 @@ BootpRequest (void)
 	pktlen = BOOTP_SIZE - sizeof(bp->bp_vend) + ext_len;
 	iplen = BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + ext_len;
 	NetSetIP(iphdr, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, iplen);
-	NetSetTimeout(SELECT_TIMEOUT * CFG_HZ, BootpTimeout);
+	NetSetTimeout(SELECT_TIMEOUT, BootpTimeout);
 
 #if defined(CONFIG_CMD_DHCP)
 	dhcp_state = SELECTING;
@@ -849,7 +849,7 @@ static void DhcpSendRequestPkt(Bootp_t *bp_offer)
 	bp->bp_htype = HWT_ETHER;
 	bp->bp_hlen = HWL_ETHER;
 	bp->bp_hops = 0;
-	bp->bp_secs = htons(get_timer(0) / CFG_HZ);
+	bp->bp_secs = htons(get_timer(0) / 1000);
 	/* Do not set the client IP, your IP, or server IP yet, since it hasn't been ACK'ed by
 	 * the server yet */
 
@@ -924,7 +924,7 @@ DhcpHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len)
 			if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC))
 				DhcpOptionsProcess((u8 *)&bp->bp_vend[4], bp);
 
-			NetSetTimeout(TIMEOUT * CFG_HZ, BootpTimeout);
+			NetSetTimeout(TIMEOUT, BootpTimeout);
 			DhcpSendRequestPkt(bp);
 #ifdef CFG_BOOTFILE_PREFIX
 		}

net/bootp.h

@@ -88,7 +88,7 @@ typedef enum { INIT,
 #define DHCP_NAK      6
 #define DHCP_RELEASE  7
 
-#define SELECT_TIMEOUT 3UL	/* Seconds to wait for offers */
+#define SELECT_TIMEOUT 3000UL	/* Milliseconds to wait for offers */
 
 /**********************************************************************/
 

net/net.c

@@ -95,14 +95,9 @@
 DECLARE_GLOBAL_DATA_PTR;
 
 #ifndef	CONFIG_ARP_TIMEOUT
-# define ARP_TIMEOUT		50UL	/* Deciseconds before trying ARP again */
-#elif (CONFIG_ARP_TIMEOUT < 100)
-# error "Due to possible overflow CONFIG_ARP_TIMEOUT must be greater than 100ms"
+# define ARP_TIMEOUT		5000UL	/* Milliseconds before trying ARP again */
 #else
-# if (CONFIG_ARP_TIMEOUT % 100)
-#  warning "Supported ARP_TIMEOUT precision is 100ms"
-# endif
-# define ARP_TIMEOUT		(CONFIG_ARP_TIMEOUT / 100)
+# define ARP_TIMEOUT		CONFIG_ARP_TIMEOUT
 #endif
 
 
@@ -264,7 +259,7 @@ void ArpTimeoutCheck(void)
 	t = get_timer(0);
 
 	/* check for arp timeout */
-	if ((t - NetArpWaitTimerStart) > ARP_TIMEOUT * CFG_HZ / 10) {
+	if ((t - NetArpWaitTimerStart) > ARP_TIMEOUT) {
 		NetArpWaitTry++;
 
 		if (NetArpWaitTry >= ARP_TIMEOUT_COUNT) {
@@ -603,7 +598,7 @@ void NetStartAgain (void)
 		return;
 	}
 #ifndef CONFIG_NET_MULTI
-	NetSetTimeout (10UL * CFG_HZ, startAgainTimeout);
+	NetSetTimeout (10000UL, startAgainTimeout);
 	NetSetHandler (startAgainHandler);
 #else	/* !CONFIG_NET_MULTI*/
 	eth_halt ();
@@ -614,7 +609,7 @@ void NetStartAgain (void)
 	if (NetRestartWrap) {
 		NetRestartWrap = 0;
 		if (NetDevExists && !once) {
-			NetSetTimeout (10UL * CFG_HZ, startAgainTimeout);
+			NetSetTimeout (10000UL, startAgainTimeout);
 			NetSetHandler (startAgainHandler);
 		} else {
 			NetState = NETLOOP_FAIL;
@@ -790,7 +785,7 @@ static void PingStart(void)
 #if defined(CONFIG_NET_MULTI)
 	printf ("Using %s device\n", eth_get_name());
 #endif	/* CONFIG_NET_MULTI */
-	NetSetTimeout (10UL * CFG_HZ, PingTimeout);
+	NetSetTimeout (10000UL, PingTimeout);
 	NetSetHandler (PingHandler);
 
 	PingSend();
@@ -813,7 +808,7 @@ static void PingStart(void)
 #define CDP_SYSOBJECT_TLV		0x0015
 #define CDP_MANAGEMENT_ADDRESS_TLV	0x0016
 
-#define CDP_TIMEOUT			(CFG_HZ/4)	/* one packet every 250ms */
+#define CDP_TIMEOUT			250UL	/* one packet every 250ms */
 
 static int CDPSeq;
 static int CDPOK;

net/nfs.c

@@ -35,7 +35,7 @@
 
 #define HASHES_PER_LINE 65	/* Number of "loading" hashes per line	*/
 #define NFS_RETRY_COUNT 30
-#define NFS_TIMEOUT 2UL
+#define NFS_TIMEOUT 2000UL
 
 static int fs_mounted = 0;
 static unsigned long rpc_id = 0;
@@ -674,7 +674,7 @@ NfsHandler (uchar *pkt, unsigned dest, unsigned src, unsigned len)
 
 	case STATE_READ_REQ:
 		rlen = nfs_read_reply (pkt, len);
-		NetSetTimeout (NFS_TIMEOUT * CFG_HZ, NfsTimeout);
+		NetSetTimeout (NFS_TIMEOUT, NfsTimeout);
 		if (rlen > 0) {
 			nfs_offset += rlen;
 			NfsSend ();
@@ -763,7 +763,7 @@ NfsStart (void)
 	printf ("\nLoad address: 0x%lx\n"
 		"Loading: *\b", load_addr);
 
-	NetSetTimeout (NFS_TIMEOUT * CFG_HZ, NfsTimeout);
+	NetSetTimeout (NFS_TIMEOUT, NfsTimeout);
 	NetSetHandler (NfsHandler);
 
 	NfsTimeoutCount = 0;

net/rarp.c

@@ -31,7 +31,7 @@
 
 #if defined(CONFIG_CMD_NET)
 
-#define TIMEOUT		5UL		/* Seconds before trying BOOTP again */
+#define TIMEOUT		5000UL	/* Milliseconds before trying BOOTP again */
 #ifndef	CONFIG_NET_RETRY_COUNT
 # define TIMEOUT_COUNT	5		/* # of timeouts before giving up  */
 #else
@@ -80,7 +80,7 @@ RarpTimeout(void)
 		puts ("\nRetry count exceeded; starting again\n");
 		NetStartAgain ();
 	} else {
-		NetSetTimeout (TIMEOUT * CFG_HZ, RarpTimeout);
+		NetSetTimeout (TIMEOUT, RarpTimeout);
 		RarpRequest ();
 	}
 }
@@ -115,7 +115,7 @@ RarpRequest (void)
 
 	NetSendPacket(NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE);
 
-	NetSetTimeout(TIMEOUT * CFG_HZ, RarpTimeout);
+	NetSetTimeout(TIMEOUT, RarpTimeout);
 	NetSetHandler(RarpHandler);
 }
 

net/sntp.c

@@ -14,7 +14,7 @@
 
 #if defined(CONFIG_CMD_NET) && defined(CONFIG_CMD_SNTP)
 
-#define SNTP_TIMEOUT 10
+#define SNTP_TIMEOUT 10000UL
 
 static int SntpOurPort;
 
@@ -82,7 +82,7 @@ SntpStart (void)
 {
 	debug ("%s\n", __FUNCTION__);
 
-	NetSetTimeout (SNTP_TIMEOUT * CFG_HZ, SntpTimeout);
+	NetSetTimeout (SNTP_TIMEOUT, SntpTimeout);
 	NetSetHandler(SntpHandler);
 	memset (NetServerEther, 0, 6);
 

net/tftp.c

@@ -15,7 +15,7 @@
 #if defined(CONFIG_CMD_NET)
 
 #define WELL_KNOWN_PORT	69		/* Well known TFTP port #		*/
-#define TIMEOUT		5UL		/* Seconds to timeout for a lost pkt	*/
+#define TIMEOUT		5000UL		/* Millisecs to timeout for lost pkt */
 #ifndef	CONFIG_NET_RETRY_COUNT
 # define TIMEOUT_COUNT	10		/* # of timeouts before giving up  */
 #else
@@ -180,7 +180,7 @@ TftpSend (void)
 		pkt += 5 /*strlen("octet")*/ + 1;
 		strcpy ((char *)pkt, "timeout");
 		pkt += 7 /*strlen("timeout")*/ + 1;
-		sprintf((char *)pkt, "%lu", TIMEOUT);
+		sprintf((char *)pkt, "%lu", TIMEOUT / 1000);
 #ifdef ET_DEBUG
 		printf("send option \"timeout %s\"\n", (char *)pkt);
 #endif
@@ -370,7 +370,7 @@ TftpHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len)
 		}
 
 		TftpLastBlock = TftpBlock;
-		NetSetTimeout (TIMEOUT * CFG_HZ, TftpTimeout);
+		NetSetTimeout (TIMEOUT, TftpTimeout);
 
 		store_block (TftpBlock - 1, pkt + 2, len);
 
@@ -449,7 +449,7 @@ TftpTimeout (void)
 		NetStartAgain ();
 	} else {
 		puts ("T ");
-		NetSetTimeout (TIMEOUT * CFG_HZ, TftpTimeout);
+		NetSetTimeout (TIMEOUT, TftpTimeout);
 		TftpSend ();
 	}
 }
@@ -520,7 +520,7 @@ TftpStart (void)
 
 	puts ("Loading: *\b");
 
-	NetSetTimeout (TIMEOUT * CFG_HZ, TftpTimeout);
+	NetSetTimeout (TIMEOUT, TftpTimeout);
 	NetSetHandler (TftpHandler);
 
 	TftpServerPort = WELL_KNOWN_PORT;