From: Srinivas Kandagatla Date: Sun, 17 Jul 2011 20:54:09 +0000 (+0000) Subject: stmmac: Allow SOCs to use Store forward mode eventhough tx_coe is 0. (V2) X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=61b8013a114cb041db2c56f747953cac69637f26;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git stmmac: Allow SOCs to use Store forward mode eventhough tx_coe is 0. (V2) This patch adds new field 'force_sf_dma_mode' to plat_stmmacenet_data struct to allow users to specify if they want to use force store forward eventhough tx_coe is not available in hw. without this flag stmmac driver will use cut-thru mode not use store-forward mode. Signed-off-by: Srinivas Kandagatla Signed-off-by: Giuseppe Cavallaro Signed-off-by: David S. Miller --- diff --git a/drivers/net/stmmac/stmmac_main.c b/drivers/net/stmmac/stmmac_main.c index c8c9e5bc6608..d37ebc80623a 100644 --- a/drivers/net/stmmac/stmmac_main.c +++ b/drivers/net/stmmac/stmmac_main.c @@ -557,9 +557,11 @@ static void free_dma_desc_resources(struct stmmac_priv *priv) */ static void stmmac_dma_operation_mode(struct stmmac_priv *priv) { - if (likely((priv->plat->tx_coe) && (!priv->no_csum_insertion))) { - /* In case of GMAC, SF mode has to be enabled - * to perform the TX COE. This depends on: + if (likely(priv->plat->force_sf_dma_mode || + ((priv->plat->tx_coe) && (!priv->no_csum_insertion)))) { + /* + * In case of GMAC, SF mode can be enabled + * to perform the TX COE in HW. This depends on: * 1) TX COE if actually supported * 2) There is no bugged Jumbo frame support * that needs to not insert csum in the TDES. diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h index 9529e49b0385..05d775690b72 100644 --- a/include/linux/stmmac.h +++ b/include/linux/stmmac.h @@ -40,6 +40,7 @@ struct plat_stmmacenet_data { int tx_coe; int bugged_jumbo; int pmt; + int force_sf_dma_mode; void (*fix_mac_speed)(void *priv, unsigned int speed); void (*bus_setup)(void __iomem *ioaddr); int (*init)(struct platform_device *pdev);