From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756079AbcHXS5Q (ORCPT ); Wed, 24 Aug 2016 14:57:16 -0400 Received: from skprod2.natinst.com ([130.164.80.23]:60951 "EHLO ni.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754093AbcHXS5N (ORCPT ); Wed, 24 Aug 2016 14:57:13 -0400 From: Xander Huff To: nicolas.ferre@atmel.com Cc: netdev@vger.kernel.org, Nathan Sullivan , linux-kernel@vger.kernel.org, xander.huff@ni.com Subject: [PATCH] net: macb: Increase DMA buffer size Date: Wed, 24 Aug 2016 13:25:59 -0500 Message-Id: <1472063159-13797-1-git-send-email-xander.huff@ni.com> X-Mailer: git-send-email 1.9.1 X-MIMETrack: Itemize by SMTP Server on US-AUS-MGWOut2/AUS/H/NIC(Release 8.5.3FP6 HF1218|December 12, 2014) at 08/24/2016 01:26:30 PM, Serialize by Router on US-AUS-MGWOut2/AUS/H/NIC(Release 8.5.3FP6 HF1218|December 12, 2014) at 08/24/2016 01:26:30 PM, Serialize complete at 08/24/2016 01:26:30 PM X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2016-08-24_10:,, signatures=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Nathan Sullivan In recent testing with the RT patchset, we have seen cases where the transmit ring can fill even with up to 200 txbds in the ring. Increase the size of the DMA rings to avoid overruns. Signed-off-by: Nathan Sullivan Acked-by: Ben Shelton Acked-by: Jaeden Amero Natinst-ReviewBoard-ID: 83662 --- drivers/net/ethernet/cadence/macb.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/cadence/macb.c b/drivers/net/ethernet/cadence/macb.c index 3256839..86a8e20 100644 --- a/drivers/net/ethernet/cadence/macb.c +++ b/drivers/net/ethernet/cadence/macb.c @@ -35,12 +35,12 @@ #include "macb.h" -#define MACB_RX_BUFFER_SIZE 128 +#define MACB_RX_BUFFER_SIZE 1536 #define RX_BUFFER_MULTIPLE 64 /* bytes */ #define RX_RING_SIZE 512 /* must be power of 2 */ #define RX_RING_BYTES (sizeof(struct macb_dma_desc) * RX_RING_SIZE) -#define TX_RING_SIZE 128 /* must be power of 2 */ +#define TX_RING_SIZE 512 /* must be power of 2 */ #define TX_RING_BYTES (sizeof(struct macb_dma_desc) * TX_RING_SIZE) /* level of occupied TX descriptors under which we wake up TX process */ -- 1.9.1