TFTP transfers fail when tftpblocksize is set to 8192 or larger due to insufficient buffer resources for IP fragment reassembly.
Adjust PBUF_POOL_SIZE and IP_REASS_MAX_PBUFS based on CONFIG_TFTP_BLOCKSIZE to support larger TFTP transfers while keeping memory usage efficient. - CONFIG_TFTP_BLOCKSIZE >= 12288:PBUF_POOL_SIZE=18, IP_REASS_MAX_PBUFS=12 - CONFIG_TFTP_BLOCKSIZE >= 8192:PBUF_POOL_SIZE=12, IP_REASS_MAX_PBUFS=6 - CONFIG_TFTP_BLOCKSIZE undefined: PBUF_POOL_SIZE=8, IP_REASS_MAX_PBUFS=4 Signed-off-by: Pranav Tilak <[email protected]> --- lib/lwip/u-boot/lwipopts.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/lib/lwip/u-boot/lwipopts.h b/lib/lwip/u-boot/lwipopts.h index e8a2c9d7a0a..b4ff31096fe 100644 --- a/lib/lwip/u-boot/lwipopts.h +++ b/lib/lwip/u-boot/lwipopts.h @@ -65,7 +65,14 @@ #define MEM_ALIGNMENT 8 #define MEMP_NUM_TCP_SEG 16 + +#if defined(CONFIG_TFTP_BLOCKSIZE) && CONFIG_TFTP_BLOCKSIZE >= 12288 +#define PBUF_POOL_SIZE 18 +#elif defined(CONFIG_TFTP_BLOCKSIZE) && CONFIG_TFTP_BLOCKSIZE >= 8192 +#define PBUF_POOL_SIZE 12 +#else #define PBUF_POOL_SIZE 8 +#endif #define LWIP_ARP 1 #define ARP_TABLE_SIZE 4 @@ -76,7 +83,15 @@ #define IP_REASSEMBLY 1 #define IP_FRAG 1 #define IP_REASS_MAXAGE 3 + +#if defined(CONFIG_TFTP_BLOCKSIZE) && CONFIG_TFTP_BLOCKSIZE >= 12288 +#define IP_REASS_MAX_PBUFS 12 +#elif defined(CONFIG_TFTP_BLOCKSIZE) && CONFIG_TFTP_BLOCKSIZE >= 8192 +#define IP_REASS_MAX_PBUFS 6 +#else #define IP_REASS_MAX_PBUFS 4 +#endif + #define IP_FRAG_USES_STATIC_BUF 0 #define IP_DEFAULT_TTL 255 -- 2.34.1
