From patchwork Fri Apr 17 22:03:48 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anton Vorontsov X-Patchwork-Id: 26138 X-Patchwork-Delegate: galak@kernel.crashing.org Return-Path: X-Original-To: patchwork-incoming@bilbo.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from ozlabs.org (ozlabs.org [203.10.76.45]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "mx.ozlabs.org", Issuer "CA Cert Signing Authority" (verified OK)) by bilbo.ozlabs.org (Postfix) with ESMTPS id 4F909B707A for ; Sat, 18 Apr 2009 08:04:16 +1000 (EST) Received: by ozlabs.org (Postfix) id CD173DE217; Sat, 18 Apr 2009 08:04:07 +1000 (EST) Delivered-To: patchwork-incoming@ozlabs.org Received: from ozlabs.org (localhost [127.0.0.1]) by ozlabs.org (Postfix) with ESMTP id CAFF8DE168 for ; Sat, 18 Apr 2009 08:04:07 +1000 (EST) X-Original-To: linuxppc-dev@ozlabs.org Delivered-To: linuxppc-dev@ozlabs.org Received: from buildserver.ru.mvista.com (unknown [213.79.90.228]) by ozlabs.org (Postfix) with ESMTP id 31F55DE0EE for ; Sat, 18 Apr 2009 08:03:51 +1000 (EST) Received: from localhost (unknown [10.150.0.9]) by buildserver.ru.mvista.com (Postfix) with ESMTP id 4E0CE8824; Sat, 18 Apr 2009 04:04:11 +0500 (SAMST) Date: Sat, 18 Apr 2009 02:03:48 +0400 From: Anton Vorontsov To: David Miller Subject: [PATCH] ucc_geth: Move freeing of TX packets to NAPI context Message-ID: <20090417220348.GA5429@oksana.dev.rtsoft.ru> MIME-Version: 1.0 Content-Disposition: inline User-Agent: Mutt/1.5.18 (2008-05-17) Cc: netdev@vger.kernel.org, Li Yang , Andy Fleming , Joakim Tjernlund , linuxppc-dev@ozlabs.org X-BeenThere: linuxppc-dev@ozlabs.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@ozlabs.org Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@ozlabs.org From: Joakim Tjernlund This will make the system alot more responsive while ping flooding the ucc_geth ethernet interface. Also set NAPI weight to 64 as this is a common value. Signed-off-by: Joakim Tjernlund Signed-off-by: Anton Vorontsov --- drivers/net/ucc_geth.c | 31 +++++++++++-------------------- drivers/net/ucc_geth.h | 1 - 2 files changed, 11 insertions(+), 21 deletions(-) diff --git a/drivers/net/ucc_geth.c b/drivers/net/ucc_geth.c index d3f39e8..98f961e 100644 --- a/drivers/net/ucc_geth.c +++ b/drivers/net/ucc_geth.c @@ -3216,7 +3216,7 @@ static int ucc_geth_tx(struct net_device *dev, u8 txQ) dev->stats.tx_packets++; /* Free the sk buffer associated with this TxBD */ - dev_kfree_skb_irq(ugeth-> + dev_kfree_skb(ugeth-> tx_skbuff[txQ][ugeth->skb_dirtytx[txQ]]); ugeth->tx_skbuff[txQ][ugeth->skb_dirtytx[txQ]] = NULL; ugeth->skb_dirtytx[txQ] = @@ -3250,9 +3250,15 @@ static int ucc_geth_poll(struct napi_struct *napi, int budget) for (i = 0; i < ug_info->numQueuesRx; i++) howmany += ucc_geth_rx(ugeth, i, budget - howmany); + /* Tx event processing */ + spin_lock(&ugeth->lock); + for (i = 0; i < ug_info->numQueuesTx; i++) + ucc_geth_tx(ugeth->ndev, i); + spin_unlock(&ugeth->lock); + if (howmany < budget) { napi_complete(napi); - setbits32(ugeth->uccf->p_uccm, UCCE_RX_EVENTS); + setbits32(ugeth->uccf->p_uccm, UCCE_RX_EVENTS | UCCE_TX_EVENTS); } return howmany; @@ -3266,8 +3272,6 @@ static irqreturn_t ucc_geth_irq_handler(int irq, void *info) struct ucc_geth_info *ug_info; register u32 ucce; register u32 uccm; - register u32 tx_mask; - u8 i; ugeth_vdbg("%s: IN", __func__); @@ -3281,27 +3285,14 @@ static irqreturn_t ucc_geth_irq_handler(int irq, void *info) out_be32(uccf->p_ucce, ucce); /* check for receive events that require processing */ - if (ucce & UCCE_RX_EVENTS) { + if (ucce & (UCCE_RX_EVENTS | UCCE_TX_EVENTS)) { if (napi_schedule_prep(&ugeth->napi)) { - uccm &= ~UCCE_RX_EVENTS; + uccm &= ~(UCCE_RX_EVENTS | UCCE_TX_EVENTS); out_be32(uccf->p_uccm, uccm); __napi_schedule(&ugeth->napi); } } - /* Tx event processing */ - if (ucce & UCCE_TX_EVENTS) { - spin_lock(&ugeth->lock); - tx_mask = UCC_GETH_UCCE_TXB0; - for (i = 0; i < ug_info->numQueuesTx; i++) { - if (ucce & tx_mask) - ucc_geth_tx(dev, i); - ucce &= ~tx_mask; - tx_mask <<= 1; - } - spin_unlock(&ugeth->lock); - } - /* Errors and other events */ if (ucce & UCCE_OTHER) { if (ucce & UCC_GETH_UCCE_BSY) @@ -3734,7 +3725,7 @@ static int ucc_geth_probe(struct of_device* ofdev, const struct of_device_id *ma dev->netdev_ops = &ucc_geth_netdev_ops; dev->watchdog_timeo = TX_TIMEOUT; INIT_WORK(&ugeth->timeout_work, ucc_geth_timeout_work); - netif_napi_add(dev, &ugeth->napi, ucc_geth_poll, UCC_GETH_DEV_WEIGHT); + netif_napi_add(dev, &ugeth->napi, ucc_geth_poll, 64); dev->mtu = 1500; ugeth->msg_enable = netif_msg_init(debug.msg_enable, UGETH_MSG_DEFAULT); diff --git a/drivers/net/ucc_geth.h b/drivers/net/ucc_geth.h index 2f8ee7c..6027647 100644 --- a/drivers/net/ucc_geth.h +++ b/drivers/net/ucc_geth.h @@ -852,7 +852,6 @@ struct ucc_geth_hardware_statistics { /* Driver definitions */ #define TX_BD_RING_LEN 0x10 #define RX_BD_RING_LEN 0x10 -#define UCC_GETH_DEV_WEIGHT TX_BD_RING_LEN #define TX_RING_MOD_MASK(size) (size-1) #define RX_RING_MOD_MASK(size) (size-1)