From mboxrd@z Thu Jan 1 00:00:00 1970 From: Fugang Duan Subject: [PATCH v3 4/6] net: fec: Increase buffer descriptor entry number Date: Thu, 5 Jun 2014 14:59:30 +0800 Message-ID: <1401951572-6538-5-git-send-email-b38611@freescale.com> References: <1401951572-6538-1-git-send-email-b38611@freescale.com> Mime-Version: 1.0 Content-Type: text/plain Cc: , , , , , , , , , To: Return-path: Received: from mail-bl2lp0207.outbound.protection.outlook.com ([207.46.163.207]:9704 "EHLO na01-bl2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751776AbaFEIXU (ORCPT ); Thu, 5 Jun 2014 04:23:20 -0400 In-Reply-To: <1401951572-6538-1-git-send-email-b38611@freescale.com> Sender: netdev-owner@vger.kernel.org List-ID: In order to support SG, software TSO, let's increase BD entry number. CC: Ezequiel Garcia CC: Eric Dumazet CC: David Laight Signed-off-by: Fugang Duan --- drivers/net/ethernet/freescale/fec.h | 4 ++-- drivers/net/ethernet/freescale/fec_main.c | 21 ++++++++++++--------- 2 files changed, 14 insertions(+), 11 deletions(-) diff --git a/drivers/net/ethernet/freescale/fec.h b/drivers/net/ethernet/freescale/fec.h index 3b8d6d1..241621d 100644 --- a/drivers/net/ethernet/freescale/fec.h +++ b/drivers/net/ethernet/freescale/fec.h @@ -246,8 +246,8 @@ struct bufdesc_ex { #define RX_RING_SIZE (FEC_ENET_RX_FRPPG * FEC_ENET_RX_PAGES) #define FEC_ENET_TX_FRSIZE 2048 #define FEC_ENET_TX_FRPPG (PAGE_SIZE / FEC_ENET_TX_FRSIZE) -#define TX_RING_SIZE 16 /* Must be power of two */ -#define TX_RING_MOD_MASK 15 /* for this to work */ +#define TX_RING_SIZE 512 /* Must be power of two */ +#define TX_RING_MOD_MASK 511 /* for this to work */ #define BD_ENET_RX_INT 0x00800000 #define BD_ENET_RX_PTP ((ushort)0x0400) diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c index cf3c368..9de1660 100644 --- a/drivers/net/ethernet/freescale/fec_main.c +++ b/drivers/net/ethernet/freescale/fec_main.c @@ -173,10 +173,6 @@ MODULE_PARM_DESC(macaddr, "FEC Ethernet MAC address"); #endif #endif /* CONFIG_M5272 */ -#if (((RX_RING_SIZE + TX_RING_SIZE) * 32) > PAGE_SIZE) -#error "FEC: descriptor ring size constants too large" -#endif - /* Interrupt events/masks. */ #define FEC_ENET_HBERR ((uint)0x80000000) /* Heartbeat error */ #define FEC_ENET_BABR ((uint)0x40000000) /* Babbling receiver */ @@ -2061,9 +2057,20 @@ static int fec_enet_init(struct net_device *ndev) const struct platform_device_id *id_entry = platform_get_device_id(fep->pdev); struct bufdesc *cbd_base; + int bd_size; + + /* init the tx & rx ring size */ + fep->tx_ring_size = TX_RING_SIZE; + fep->rx_ring_size = RX_RING_SIZE; + + if (fep->bufdesc_ex) + bd_size = sizeof(struct bufdesc_ex); + else + bd_size = sizeof(struct bufdesc); + bd_size *= (fep->tx_ring_size + fep->rx_ring_size); /* Allocate memory for buffer descriptors. */ - cbd_base = dma_alloc_coherent(NULL, PAGE_SIZE, &fep->bd_dma, + cbd_base = dma_alloc_coherent(NULL, bd_size, &fep->bd_dma, GFP_KERNEL); if (!cbd_base) return -ENOMEM; @@ -2077,10 +2084,6 @@ static int fec_enet_init(struct net_device *ndev) /* make sure MAC we just acquired is programmed into the hw */ fec_set_mac_address(ndev, NULL); - /* init the tx & rx ring size */ - fep->tx_ring_size = TX_RING_SIZE; - fep->rx_ring_size = RX_RING_SIZE; - /* Set receive and transmit descriptor base. */ fep->rx_bd_base = cbd_base; if (fep->bufdesc_ex) -- 1.7.8