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net: Improve the speed of netconsole

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Previously u-boot would initialize the network interface for every
network operation and then shut it down again.  This makes sense for
most operations where the network in not known to be needed soon after
the operation is complete.  In the case of netconsole, it will use the
network for every interaction with the shell or every printf.  This
means that the network is being reinitialized very often.  On many
devices, this intialization is very slow.

This patch checks for consecutive netconsole actions and leaves the
ethernet hardware initialized between them.  It will still behave the
same old way for all other network operations and any time another
network operation happens between netconsole operations.

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Cc: Stefano Babic <sbabic@denx.de>
Acked-by: Stefano Babic <sbabic@denx.de>
This commit is contained in:
Joe Hershberger 2012-08-03 10:59:08 +00:00
parent 2c8fe5120f
commit f8be7d659c
5 changed files with 98 additions and 17 deletions
Download patch file Download diff file Expand all files Collapse all files

26
net/net.c
View file

@ -315,12 +315,15 @@ int NetLoop(enum proto_t protocol)
bootstage_mark_name(BOOTSTAGE_ID_ETH_START, "eth_start");
net_init();
eth_halt();
eth_set_current();
if (eth_init(bd) < 0) {
if (eth_is_on_demand_init() || protocol != NETCONS) {
eth_halt();
return -1;
}
eth_set_current();
if (eth_init(bd) < 0) {
eth_halt();
return -1;
}
} else
eth_init_state_only(bd);
restart:
net_set_state(NETLOOP_CONTINUE);
@ -460,6 +463,9 @@ restart:
net_cleanup_loop();
eth_halt();
/* Invalidate the last protocol */
eth_set_last_protocol(BOOTP);
puts("\nAbort\n");
/* include a debug print as well incase the debug
messages are directed to stderr */
@ -517,13 +523,21 @@ restart:
sprintf(buf, "%lX", (unsigned long)load_addr);
setenv("fileaddr", buf);
}
eth_halt();
if (protocol != NETCONS)
eth_halt();
else
eth_halt_state_only();
eth_set_last_protocol(protocol);
ret = NetBootFileXferSize;
debug_cond(DEBUG_INT_STATE, "--- NetLoop Success!\n");
goto done;
case NETLOOP_FAIL:
net_cleanup_loop();
/* Invalidate the last protocol */
eth_set_last_protocol(BOOTP);
debug_cond(DEBUG_INT_STATE, "--- NetLoop Fail!\n");
goto done;