From: Jesus Sanchez-Palencia Date: Sat, 17 Nov 2018 00:19:23 +0000 (-0800) Subject: igb: Change RXPBSIZE size when setting Qav mode X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=6f9ae17530f996e90268dae5ee843e432e40ccb3;p=openwrt%2Fstaging%2Fblogic.git igb: Change RXPBSIZE size when setting Qav mode Section 4.5.9 of the datasheet says that the total size of all packet buffers combined (TxPB 0 + 1 + 2 + 3 + RxPB + BMC2OS + OS2BMC) must not exceed 60KB. Today we are configuring a total of 62KB, so reduce the RxPB from 32KB to 30KB in order to respect that. The choice of changing RxPBSIZE here is mainly because it seems more correct to give more priority to the transmit packet buffers over the receiver ones when running in Qav mode. Also, the BMC2OS and OS2BMC sizes are already too short. Signed-off-by: Jesus Sanchez-Palencia Tested-by: Aaron Brown Signed-off-by: Jeff Kirsher --- diff --git a/drivers/net/ethernet/intel/igb/e1000_defines.h b/drivers/net/ethernet/intel/igb/e1000_defines.h index 8a28f3388f69..01fcfc6f3415 100644 --- a/drivers/net/ethernet/intel/igb/e1000_defines.h +++ b/drivers/net/ethernet/intel/igb/e1000_defines.h @@ -334,6 +334,7 @@ #define I210_RXPBSIZE_DEFAULT 0x000000A2 /* RXPBSIZE default */ #define I210_RXPBSIZE_MASK 0x0000003F +#define I210_RXPBSIZE_PB_30KB 0x0000001E #define I210_RXPBSIZE_PB_32KB 0x00000020 #define I210_TXPBSIZE_DEFAULT 0x04000014 /* TXPBSIZE default */ #define I210_TXPBSIZE_MASK 0xC0FFFFFF diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c index bb4f3f64fbf0..e135adf46980 100644 --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -1934,7 +1934,7 @@ static void igb_setup_tx_mode(struct igb_adapter *adapter) val = rd32(E1000_RXPBS); val &= ~I210_RXPBSIZE_MASK; - val |= I210_RXPBSIZE_PB_32KB; + val |= I210_RXPBSIZE_PB_30KB; wr32(E1000_RXPBS, val); /* Section 8.12.9 states that MAX_TPKT_SIZE from DTXMXPKTSZ