Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755311Ab0LGLAa (ORCPT ); Tue, 7 Dec 2010 06:00:30 -0500 Received: from sm-d311v.smileserver.ne.jp ([203.211.202.206]:33269 "EHLO sm-d311v.smileserver.ne.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752292Ab0LGLA3 (ORCPT ); Tue, 7 Dec 2010 06:00:29 -0500 Message-ID: <4CFE1473.2020107@dsn.okisemi.com> Date: Tue, 07 Dec 2010 20:03:15 +0900 From: Tomoya MORINAGA User-Agent: Mozilla/5.0 (X11; U; Linux i686; ja; rv:1.9.2.12) Gecko/20101027 Thunderbird/3.1.6 MIME-Version: 1.0 To: Wolfgang Grandegger , socketcan-core@lists.berlios.de, netdev@vger.kernel.org, linux-kernel@vger.kernel.org CC: qi.wang@intel.com, yong.y.wang@intel.com, andrew.chih.howe.khor@intel.com, joel.clark@intel.com, kok.howg.ewe@intel.com, margie.foster@intel.com Subject: [PATCH net-next-2.6 v8 02/20] CAN : Divide poll function Content-Type: text/plain; charset=ISO-2022-JP Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3761 Lines: 126 To easy to read/understand, divide poll function into two sub-functions. Signed-off-by: Tomoya MORINAGA --- drivers/net/can/pch_can.c | 71 ++++++++++++++++++++++----------------------- 1 files changed, 35 insertions(+), 36 deletions(-) diff --git a/drivers/net/can/pch_can.c b/drivers/net/can/pch_can.c index f0f1404..0b6d4f4 100644 --- a/drivers/net/can/pch_can.c +++ b/drivers/net/can/pch_can.c @@ -819,72 +819,71 @@ RX_NEXT: return rcv_pkts; } -static int pch_can_rx_poll(struct napi_struct *napi, int quota) + +static void pch_can_tx_complete(struct net_device *ndev, u32 int_stat) { - struct net_device *ndev = napi->dev; struct pch_can_priv *priv = netdev_priv(ndev); struct net_device_stats *stats = &(priv->ndev->stats); u32 dlc; + + can_get_echo_skb(ndev, int_stat - PCH_RX_OBJ_END - 1); + iowrite32(PCH_CMASK_RX_TX_GET | PCH_CMASK_CLRINTPND, + &priv->regs->ifregs[1].cmask); + pch_can_check_if_busy(&priv->regs->ifregs[1].creq, int_stat); + dlc = get_can_dlc(ioread32(&priv->regs->ifregs[1].mcont) & + PCH_IF_MCONT_DLC); + stats->tx_bytes += dlc; + stats->tx_packets++; + if (int_stat == PCH_TX_OBJ_END) + netif_wake_queue(ndev); +} + +static int pch_can_rx_poll(struct napi_struct *napi, int quota) +{ + struct net_device *ndev = napi->dev; + struct pch_can_priv *priv = netdev_priv(ndev); u32 int_stat; int rcv_pkts = 0; u32 reg_stat; int_stat = pch_can_int_pending(priv); if (!int_stat) - return 0; + goto end; -INT_STAT: - if (int_stat == PCH_STATUS_INT) { + if ((int_stat == PCH_STATUS_INT) && (quota > 0)) { reg_stat = ioread32(&priv->regs->stat); if (reg_stat & (PCH_BUS_OFF | PCH_LEC_ALL)) { - if ((reg_stat & PCH_LEC_ALL) != PCH_LEC_ALL) + if (reg_stat & PCH_BUS_OFF || + (reg_stat & PCH_LEC_ALL) != PCH_LEC_ALL) { pch_can_error(ndev, reg_stat); + quota--; + } } - if (reg_stat & PCH_TX_OK) { - iowrite32(PCH_CMASK_RX_TX_GET, - &priv->regs->ifregs[1].cmask); - pch_can_check_if_busy(&priv->regs->ifregs[1].creq, - ioread32(&priv->regs->intr)); + if (reg_stat & PCH_TX_OK) pch_can_bit_clear(&priv->regs->stat, PCH_TX_OK); - } if (reg_stat & PCH_RX_OK) pch_can_bit_clear(&priv->regs->stat, PCH_RX_OK); int_stat = pch_can_int_pending(priv); - if (int_stat == PCH_STATUS_INT) - goto INT_STAT; } -MSG_OBJ: + if (quota == 0) + goto end; + if ((int_stat >= PCH_RX_OBJ_START) && (int_stat <= PCH_RX_OBJ_END)) { - rcv_pkts = pch_can_rx_normal(ndev, int_stat); - if (rcv_pkts < 0) - return 0; + rcv_pkts += pch_can_rx_normal(ndev, int_stat); + quota -= rcv_pkts; + if (quota < 0) + goto end; } else if ((int_stat >= PCH_TX_OBJ_START) && (int_stat <= PCH_TX_OBJ_END)) { /* Handle transmission interrupt */ - can_get_echo_skb(ndev, int_stat - PCH_RX_OBJ_END - 1); - iowrite32(PCH_CMASK_RX_TX_GET | PCH_CMASK_CLRINTPND, - &priv->regs->ifregs[1].cmask); - dlc = ioread32(&priv->regs->ifregs[1].mcont) & - PCH_IF_MCONT_DLC; - pch_can_check_if_busy(&priv->regs->ifregs[1].creq, int_stat); - if (dlc > 8) - dlc = 8; - stats->tx_bytes += dlc; - stats->tx_packets++; - if (int_stat == PCH_TX_OBJ_END) - netif_wake_queue(ndev); + pch_can_tx_complete(ndev, int_stat); } - int_stat = pch_can_int_pending(priv); - if (int_stat == PCH_STATUS_INT) - goto INT_STAT; - else if (int_stat >= 1 && int_stat <= 32) - goto MSG_OBJ; - +end: napi_complete(napi); pch_can_set_int_enables(priv, PCH_CAN_ALL); -- 1.6.0.6 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/