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| author | Alessandro Rubini <rubini-list@gnudd.com> | 2009-08-07 13:59:06 +0200 |
|---|---|---|
| committer | Ben Warren <biggerbadderben@gmail.com> | 2009-08-25 13:35:54 -0700 |
| commit | 89ba81d1079a07b8430a98c1746c6d411312eb0d (patch) | |
| tree | b04c80d57906d00ee3f055c4f58468e54458f339 /net | |
| parent | 5cfaa4e54d0eb8232fa1cf092d955fdaed5b673d (diff) | |
| download | u-boot-89ba81d1079a07b8430a98c1746c6d411312eb0d.tar.gz u-boot-89ba81d1079a07b8430a98c1746c6d411312eb0d.tar.xz u-boot-89ba81d1079a07b8430a98c1746c6d411312eb0d.zip | |
tftp: get the tftp block size from config file and from the environment
Increasing the block size is useful if CONFIG_IP_DEFRAG is
used. Howerver, the last fragments in a burst may overflow the
receiving ethernet, so the default is left at 1468, with thre new
CONFIG_TFTP_BLOCKSIZE for config files. Further, "tftpblocksize"
can be set in the environment.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/tftp.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/net/tftp.c b/net/tftp.c index fb98a346ea..0fd6c65604 100644 --- a/net/tftp.c +++ b/net/tftp.c @@ -84,8 +84,14 @@ extern flash_info_t flash_info[]; /* 512 is poor choice for ethernet, MTU is typically 1500. * Minus eth.hdrs thats 1468. Can get 2x better throughput with * almost-MTU block sizes. At least try... fall back to 512 if need be. + * (but those using CONFIG_IP_DEFRAG may want to set a larger block in cfg file) */ +#ifdef CONFIG_TFTP_BLOCKSIZE +#define TFTP_MTU_BLOCKSIZE CONFIG_TFTP_BLOCKSIZE +#else #define TFTP_MTU_BLOCKSIZE 1468 +#endif + static unsigned short TftpBlkSize=TFTP_BLOCK_SIZE; static unsigned short TftpBlkSizeOption=TFTP_MTU_BLOCKSIZE; @@ -466,9 +472,12 @@ TftpTimeout (void) void TftpStart (void) { -#ifdef CONFIG_TFTP_PORT char *ep; /* Environment pointer */ -#endif + + /* Allow the user to choose tftpblocksize */ + if ((ep = getenv("tftpblocksize")) != NULL) + TftpBlkSizeOption = simple_strtol(ep, NULL, 10); + debug("tftp block size is %i\n", TftpBlkSizeOption); TftpServerIP = NetServerIP; if (BootFile[0] == '\0') { |