From: Bert Kenward Date: Tue, 25 Apr 2017 12:44:54 +0000 (+0100) Subject: sfc: tx ring can only have 2048 entries for all EF10 NICs X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=a53d26eb888ab1c41779c443daf1af948c641e0b;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git sfc: tx ring can only have 2048 entries for all EF10 NICs Fixes: dd248f1bc65b ("sfc: Add PCI ID for Solarflare 8000 series 10/40G NIC") Reported-by: Patrick Talbert Signed-off-by: Bert Kenward Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/sfc/efx.h b/drivers/net/ethernet/sfc/efx.h index ee14662415c5..a0c52e328102 100644 --- a/drivers/net/ethernet/sfc/efx.h +++ b/drivers/net/ethernet/sfc/efx.h @@ -74,7 +74,10 @@ void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue); #define EFX_RXQ_MIN_ENT 128U #define EFX_TXQ_MIN_ENT(efx) (2 * efx_tx_max_skb_descs(efx)) -#define EFX_TXQ_MAX_ENT(efx) (EFX_WORKAROUND_35388(efx) ? \ +/* All EF10 architecture NICs steal one bit of the DMAQ size for various + * other purposes when counting TxQ entries, so we halve the queue size. + */ +#define EFX_TXQ_MAX_ENT(efx) (EFX_WORKAROUND_EF10(efx) ? \ EFX_MAX_DMAQ_SIZE / 2 : EFX_MAX_DMAQ_SIZE) static inline bool efx_rss_enabled(struct efx_nic *efx) diff --git a/drivers/net/ethernet/sfc/workarounds.h b/drivers/net/ethernet/sfc/workarounds.h index 103f827a1623..c67fa18b8121 100644 --- a/drivers/net/ethernet/sfc/workarounds.h +++ b/drivers/net/ethernet/sfc/workarounds.h @@ -16,6 +16,7 @@ */ #define EFX_WORKAROUND_SIENA(efx) (efx_nic_rev(efx) == EFX_REV_SIENA_A0) +#define EFX_WORKAROUND_EF10(efx) (efx_nic_rev(efx) >= EFX_REV_HUNT_A0) #define EFX_WORKAROUND_10G(efx) 1 /* Bit-bashed I2C reads cause performance drop */