net: Provide a function to run network operations

Add a new netboot_run() function which can be used for simple network
operations, such as loading a file. Put the implementation in an
internal function, used by the existing code.

Place this function into the net/ code, so that it does not need the
command line to be available.

Document which network operations are supported, i.e. a limited subset,
for now.

For the one board which uses lwip, it is not quite clear how to avoid
using the cmdline interface. This will need some discussion.

Signed-off-by: Simon Glass <sjg@chromium.org>

1 files changed, 44 insertions, 0 deletions

diff --git a/net/net.c b/net/net.c
index 1828f1cca36..ef97377cdec 100644
--- a/net/net.c
+++ b/net/net.c
@@ -775,6 +775,50 @@ done:
 	return ret;
 }
 
+int netboot_run_(enum proto_t proto, ulong addr, const char *fname, ulong size,
+		 bool fname_explicit, bool ipv6)
+{
+	int ret;
+
+	bootstage_mark(BOOTSTAGE_ID_NET_START);
+
+	/*
+	 * For now we use the global variables as that is the only way to
+	 * control the network stack. At some point, perhaps, the state could be
+	 * in a struct
+	 */
+	if (IS_ENABLED(CONFIG_CMD_TFTPPUT) && proto == TFTPPUT)
+		image_save_addr = addr;
+	else
+		image_load_addr = addr;
+
+	net_boot_file_name_explicit = fname_explicit;
+	copy_filename(net_boot_file_name, fname, sizeof(net_boot_file_name));
+	if (IS_ENABLED(CONFIG_IPV6))
+		use_ip6 = ipv6;
+	if (IS_ENABLED(CONFIG_CMD_TFTPPUT) && proto == TFTPPUT) {
+		image_save_addr = addr;
+		image_save_size = size;
+	} else {
+		image_load_addr = addr;
+	}
+
+	ret = net_loop(proto);
+	if (ret < 0) {
+		bootstage_error(BOOTSTAGE_ID_NET_NETLOOP_OK);
+		return ret;
+	}
+	bootstage_mark(BOOTSTAGE_ID_NET_NETLOOP_OK);
+
+	return 0;
+}
+
+int netboot_run(enum proto_t proto, ulong addr, const char *fname, ulong size,
+		bool ipv6)
+{
+	return netboot_run_(proto, addr, fname, size, true, ipv6);
+}
+
 /**********************************************************************/
 
 static void start_again_timeout_handler(void)