From patchwork Thu Mar 13 06:55:55 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Byungho An X-Patchwork-Id: 3822171 Return-Path: X-Original-To: patchwork-linux-samsung-soc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id BE61CBF540 for ; Thu, 13 Mar 2014 06:56:32 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 463E52021F for ; Thu, 13 Mar 2014 06:56:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7AB0E2020A for ; Thu, 13 Mar 2014 06:56:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753226AbaCMG4Y (ORCPT ); Thu, 13 Mar 2014 02:56:24 -0400 Received: from mailout1.samsung.com ([203.254.224.24]:48922 "EHLO mailout1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751777AbaCMG4A (ORCPT ); Thu, 13 Mar 2014 02:56:00 -0400 Received: from epcpsbgr4.samsung.com (u144.gpu120.samsung.co.kr [203.254.230.144]) by mailout1.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0N2D0019R4L7SWB0@mailout1.samsung.com>; Thu, 13 Mar 2014 15:55:56 +0900 (KST) Received: from epcpsbgm2.samsung.com ( [203.254.230.49]) by epcpsbgr4.samsung.com (EPCPMTA) with SMTP id 14.17.10364.B7651235; Thu, 13 Mar 2014 15:55:55 +0900 (KST) X-AuditID: cbfee690-b7f266d00000287c-8a-5321567bdf97 Received: from epmmp2 ( [203.254.227.17]) by epcpsbgm2.samsung.com (EPCPMTA) with SMTP id E6.B5.28157.B7651235; Thu, 13 Mar 2014 15:55:55 +0900 (KST) Received: from DObh74an01 ([12.36.166.149]) by mmp2.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTPA id <0N2D00KSH4L7AV20@mmp2.samsung.com>; Thu, 13 Mar 2014 15:55:55 +0900 (KST) From: Byungho An To: netdev@vger.kernel.org, linux-samsung-soc@vger.kernel.org Cc: davem@davemloft.net, ilho215.lee@samsung.com, ks.giri@samsung.com, 'Joe Perches' Subject: [PATCH V2 RE-SEND 3/7] net: sxgbe: add EEE(Energy Efficient Ethernet) for Samsung sxgbe Date: Thu, 13 Mar 2014 15:55:55 +0900 Message-id: <007c01cf3e89$47ee8790$d7cb96b0$%an@samsung.com> MIME-version: 1.0 Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7bit X-Mailer: Microsoft Office Outlook 12.0 Thread-index: Ac8+iUfNe9Qq5JPLQpazhwD7Mtb1jA== Content-language: ko X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrBIsWRmVeSWpSXmKPExsVy+t8zQ93qMMVgg89PDC2unjvGaDHnfAuL xdF/CxktZt9/zGLRu+Aqm8X8ozuYLGac38dkcWyBmAOHx5aVN5k8vqy6xuzRt2UVo8fnTXIB LFFcNimpOZllqUX6dglcGfM372ctaJ7GWPH45WWWBsZZNV2MnBwSAiYSkz4sZYGwxSQu3FvP 1sXIxSEksIxR4mvTM+YuRg6wojkb8iHi0xklJnZvZ4ZwfjNKbFj5kA2km01ATaJ55mUwW0TA VmLJkc/sIM3MAhkSSx9Eg4SFBZIkdqz5DbaMRUBV4lLDD3YQm1fARuL3vDmsELagxI/J98Bq mAW0JNbvPM4EYctLbF7zFuoedYlHf3UhNulJ9HashyoRkdj34h0jyGkSApfYJf6uO8cKsUtA 4tvkQywQvbISmw4wQ/wrKXFwxQ2WCYxis5BsnoVk8ywkm2chWbGAkWUVo2hqQXJBcVJ6kYle cWJucWleul5yfu4mRkgsTtjBeO+A9SHGZKD1E5mlRJPzgbGcVxJvaGxmZGFqYmpsZG5pRpqw kjiv2qOkICGB9MSS1OzU1ILUovii0pzU4kOMTBycUg2MhZmx24o2vpr0ccOSK1v2ePlKrN9y MKFEbxVXUWJB5sPbdeEtM7kKHlWoFicfvFDxaGfCs0erbl1L2sjlkKq9qyGRc2ax9aTIh8UW lVfOzuLtSW5KFQiL5622/8zs9dxB5urtWsG9Mi46GqqpdqzRwtHzQkuFEiVs/33+NuuwNvfv d31Xa+cqsRRnJBpqMRcVJwIA2bl6j9sCAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrKKsWRmVeSWpSXmKPExsVy+t9jQd3qMMVggyOnNC2unjvGaDHnfAuL xdF/CxktZt9/zGLRu+Aqm8X8ozuYLGac38dkcWyBmAOHx5aVN5k8vqy6xuzRt2UVo8fnTXIB LFENjDYZqYkpqUUKqXnJ+SmZeem2St7B8c7xpmYGhrqGlhbmSgp5ibmptkouPgG6bpk5QGco KZQl5pQChQISi4uV9O0wTQgNcdO1gGmM0PUNCYLrMTJAAwnrGDPmb97PWtA8jbHi8cvLLA2M s2q6GDk4JARMJOZsyO9i5AQyxSQu3FvP1sXIxSEkMJ1RYmL3dmYI5zejxIaVD9lAqtgE1CSa Z14Gs0UEbCWWHPnMDjKIWSBDYumDaJCwsECSxI41v1lAbBYBVYlLDT/YQWxeARuJ3/PmsELY ghI/Jt8Dq2EW0JJYv/M4E4QtL7F5zVtmiNvUJR791YXYpCfR27EeqkREYt+Ld4wTGAVmIZk0 C8mkWUgmzULSsoCRZRWjaGpBckFxUnqukV5xYm5xaV66XnJ+7iZGcKQ/k97BuKrB4hCjAAej Eg/viuUKwUKsiWXFlbmHGCU4mJVEeD19FIOFeFMSK6tSi/Lji0pzUosPMSYDPTqRWUo0OR+Y hPJK4g2NTcyMLI3MLIxMzM1JE1YS5z3Yah0oJJCeWJKanZpakFoEs4WJg1OqgXHNrFfrGC40 GW7L65zf2HVopuuF+IK47tuNvysmnLrsmbBmq279jXNzrcuSsy5wJHU7hQt9aNlXu+bVzZAf n28UzuN1TNn8bKWl19uWc9O5QwxetZZFzGTznCJaLdc6e37Uz2Mif/m2r5t0W3xDvcvWaUnh 7w6y3ZyyQf/wMd1dtQ82KOyrva2gxFKckWioxVxUnAgAtxBSTDgDAAA= DLP-Filter: Pass X-MTR: 20000000000000000@CPGS X-CFilter-Loop: Reflected Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Girish K S Added support for the EEE(Energy Efficient Ethernet) in 10G ethernet driver. Signed-off-by: Girish K S Neatening-by: Joe Perches Signed-off-by: Byungho An --- drivers/net/ethernet/samsung/sxgbe_common.h | 54 +++++++++ drivers/net/ethernet/samsung/sxgbe_core.c | 86 +++++++++++++- drivers/net/ethernet/samsung/sxgbe_ethtool.c | 47 ++++++++ drivers/net/ethernet/samsung/sxgbe_main.c | 152 ++++++++++++++++++++++++- drivers/net/ethernet/samsung/sxgbe_platform.c | 4 + drivers/net/ethernet/samsung/sxgbe_reg.h | 5 + 6 files changed, 346 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/samsung/sxgbe_common.h b/drivers/net/ethernet/samsung/sxgbe_common.h index 3f16220..21d8ee6 100644 --- a/drivers/net/ethernet/samsung/sxgbe_common.h +++ b/drivers/net/ethernet/samsung/sxgbe_common.h @@ -115,6 +115,33 @@ struct sxgbe_mtl_ops; #define RX_PTP_SIGNAL 0x0A #define RX_PTP_RESV_MSG 0x0F +/* EEE-LPI mode flags*/ +#define TX_ENTRY_LPI_MODE 0x10 +#define TX_EXIT_LPI_MODE 0x20 +#define RX_ENTRY_LPI_MODE 0x40 +#define RX_EXIT_LPI_MODE 0x80 + +/* EEE-LPI Interrupt status flag */ +#define LPI_INT_STATUS BIT(5) + +/* EEE-LPI Default timer values */ +#define LPI_LINK_STATUS_TIMER 0x3E8 +#define LPI_MAC_WAIT_TIMER 0x00 + +/* EEE-LPI Control and status definitions */ +#define LPI_CTRL_STATUS_TXA BIT(19) +#define LPI_CTRL_STATUS_PLSDIS BIT(18) +#define LPI_CTRL_STATUS_PLS BIT(17) +#define LPI_CTRL_STATUS_LPIEN BIT(16) +#define LPI_CTRL_STATUS_TXRSTP BIT(11) +#define LPI_CTRL_STATUS_RXRSTP BIT(10) +#define LPI_CTRL_STATUS_RLPIST BIT(9) +#define LPI_CTRL_STATUS_TLPIST BIT(8) +#define LPI_CTRL_STATUS_RLPIEX BIT(3) +#define LPI_CTRL_STATUS_RLPIEN BIT(2) +#define LPI_CTRL_STATUS_TLPIEX BIT(1) +#define LPI_CTRL_STATUS_TLPIEN BIT(0) + enum dma_irq_status { tx_hard_error = BIT(0), tx_bump_tc = BIT(1), @@ -199,6 +226,13 @@ struct sxgbe_extra_stats { unsigned long rx_buffer_access_err; unsigned long rx_data_transfer_err; + /* EEE-LPI stats */ + unsigned long tx_lpi_entry_n; + unsigned long tx_lpi_exit_n; + unsigned long rx_lpi_entry_n; + unsigned long rx_lpi_exit_n; + unsigned long eee_wakeup_error_n; + /* RX specific */ /* L2 error */ unsigned long rx_code_gmii_err; @@ -306,6 +340,13 @@ struct sxgbe_core_ops { unsigned char feature_index); /* adjust SXGBE speed */ void (*set_speed)(void __iomem *ioaddr, unsigned char speed); + + /* EEE-LPI specific operations */ + void (*set_eee_mode)(void __iomem *ioaddr); + void (*reset_eee_mode)(void __iomem *ioaddr); + void (*set_eee_timer)(void __iomem *ioaddr, const int ls, + const int tw); + void (*set_eee_pls)(void __iomem *ioaddr, const int link); }; const struct sxgbe_core_ops *sxgbe_get_core_ops(void); @@ -367,6 +408,8 @@ struct sxgbe_hw_features { /* IEEE 1588-2008 */ unsigned int atime_stamp; + unsigned int eee; + unsigned int tx_csum_offload; unsigned int rx_csum_offload; unsigned int multi_macaddr; @@ -447,6 +490,14 @@ struct sxgbe_priv_data { u32 adv_ts; int use_riwt; spinlock_t ptp_lock; + + /* EEE-LPI specific members */ + struct timer_list eee_ctrl_timer; + bool tx_path_in_lpi_mode; + int lpi_irq; + int eee_enabled; + int eee_active; + int tx_lpi_timer; }; /* Function prototypes */ @@ -469,4 +520,7 @@ int sxgbe_restore(struct net_device *ndev); const struct sxgbe_mtl_ops *sxgbe_get_mtl_ops(void); +void sxgbe_disable_eee_mode(struct sxgbe_priv_data * const priv); +bool sxgbe_eee_init(struct sxgbe_priv_data * const priv); + #endif /* __SXGBE_COMMON_H__ */ diff --git a/drivers/net/ethernet/samsung/sxgbe_core.c b/drivers/net/ethernet/samsung/sxgbe_core.c index 17eea58..bf93b16 100644 --- a/drivers/net/ethernet/samsung/sxgbe_core.c +++ b/drivers/net/ethernet/samsung/sxgbe_core.c @@ -47,11 +47,38 @@ static void sxgbe_core_dump_regs(void __iomem *ioaddr) { } +static int sxgbe_get_lpi_status(void __iomem *ioaddr, const u32 irq_status) +{ + int status = 0; + int lpi_status; + + /* Reading this register shall clear all the LPI status bits */ + lpi_status = readl(ioaddr + SXGBE_CORE_LPI_CTRL_STATUS); + + if (lpi_status & LPI_CTRL_STATUS_TLPIEN) + status |= TX_ENTRY_LPI_MODE; + if (lpi_status & LPI_CTRL_STATUS_TLPIEX) + status |= TX_EXIT_LPI_MODE; + if (lpi_status & LPI_CTRL_STATUS_RLPIEN) + status |= RX_ENTRY_LPI_MODE; + if (lpi_status & LPI_CTRL_STATUS_RLPIEX) + status |= RX_EXIT_LPI_MODE; + + return status; +} + /* Handle extra events on specific interrupts hw dependent */ static int sxgbe_core_host_irq_status(void __iomem *ioaddr, struct sxgbe_extra_stats *x) { - return 0; + int irq_status, status = 0; + + irq_status = readl(ioaddr + SXGBE_CORE_INT_STATUS_REG); + + if (unlikely(irq_status & LPI_INT_STATUS)) + status |= sxgbe_get_lpi_status(ioaddr, irq_status); + + return status; } /* Set power management mode (e.g. magic frame) */ @@ -137,6 +164,59 @@ static void sxgbe_core_set_speed(void __iomem *ioaddr, unsigned char speed) writel(tx_cfg, ioaddr + SXGBE_CORE_TX_CONFIG_REG); } +static void sxgbe_set_eee_mode(void __iomem *ioaddr) +{ + u32 ctrl; + + /* Enable the LPI mode for transmit path with Tx automate bit set. + * When Tx Automate bit is set, MAC internally handles the entry + * to LPI mode after all outstanding and pending packets are + * transmitted. + */ + ctrl = readl(ioaddr + SXGBE_CORE_LPI_CTRL_STATUS); + ctrl |= LPI_CTRL_STATUS_LPIEN | LPI_CTRL_STATUS_TXA; + writel(ctrl, ioaddr + SXGBE_CORE_LPI_CTRL_STATUS); +} + +static void sxgbe_reset_eee_mode(void __iomem *ioaddr) +{ + u32 ctrl; + + ctrl = readl(ioaddr + SXGBE_CORE_LPI_CTRL_STATUS); + ctrl &= ~(LPI_CTRL_STATUS_LPIEN | LPI_CTRL_STATUS_TXA); + writel(ctrl, ioaddr + SXGBE_CORE_LPI_CTRL_STATUS); +} + +static void sxgbe_set_eee_pls(void __iomem *ioaddr, const int link) +{ + u32 ctrl; + + ctrl = readl(ioaddr + SXGBE_CORE_LPI_CTRL_STATUS); + + /* If the PHY link status is UP then set PLS */ + if (link) + ctrl |= LPI_CTRL_STATUS_PLS; + else + ctrl &= ~LPI_CTRL_STATUS_PLS; + + writel(ctrl, ioaddr + SXGBE_CORE_LPI_CTRL_STATUS); +} + +static void sxgbe_set_eee_timer(void __iomem *ioaddr, + const int ls, const int tw) +{ + int value = ((tw & 0xffff)) | ((ls & 0x7ff) << 16); + + /* Program the timers in the LPI timer control register: + * LS: minimum time (ms) for which the link + * status from PHY should be ok before transmitting + * the LPI pattern. + * TW: minimum time (us) for which the core waits + * after it has stopped transmitting the LPI pattern. + */ + writel(value, ioaddr + SXGBE_CORE_LPI_TIMER_CTRL); +} + const struct sxgbe_core_ops core_ops = { .core_init = sxgbe_core_init, .dump_regs = sxgbe_core_dump_regs, @@ -149,6 +229,10 @@ const struct sxgbe_core_ops core_ops = { .get_controller_version = sxgbe_get_controller_version, .get_hw_feature = sxgbe_get_hw_feature, .set_speed = sxgbe_core_set_speed, + .set_eee_mode = sxgbe_set_eee_mode, + .reset_eee_mode = sxgbe_reset_eee_mode, + .set_eee_timer = sxgbe_set_eee_timer, + .set_eee_pls = sxgbe_set_eee_pls, }; const struct sxgbe_core_ops *sxgbe_get_core_ops(void) diff --git a/drivers/net/ethernet/samsung/sxgbe_ethtool.c b/drivers/net/ethernet/samsung/sxgbe_ethtool.c index 1dce2b2..9083300 100644 --- a/drivers/net/ethernet/samsung/sxgbe_ethtool.c +++ b/drivers/net/ethernet/samsung/sxgbe_ethtool.c @@ -32,10 +32,57 @@ struct sxgbe_stats { } static const struct sxgbe_stats sxgbe_gstrings_stats[] = { + SXGBE_STAT(tx_lpi_entry_n), + SXGBE_STAT(tx_lpi_exit_n), + SXGBE_STAT(rx_lpi_entry_n), + SXGBE_STAT(rx_lpi_exit_n), + SXGBE_STAT(eee_wakeup_error_n), }; #define SXGBE_STATS_LEN ARRAY_SIZE(sxgbe_gstrings_stats) +static int sxgbe_ethtool_get_eee(struct net_device *dev, + struct ethtool_eee *edata) +{ + struct sxgbe_priv_data *priv = netdev_priv(dev); + + if (!priv->hw_cap.eee) + return -EOPNOTSUPP; + + edata->eee_enabled = priv->eee_enabled; + edata->eee_active = priv->eee_active; + edata->tx_lpi_timer = priv->tx_lpi_timer; + + return phy_ethtool_get_eee(priv->phydev, edata); +} + +static int sxgbe_ethtool_set_eee(struct net_device *dev, + struct ethtool_eee *edata) +{ + struct sxgbe_priv_data *priv = netdev_priv(dev); + + priv->eee_enabled = edata->eee_enabled; + + if (!priv->eee_enabled) { + sxgbe_disable_eee_mode(priv); + } else { + /* We are asking for enabling the EEE but it is safe + * to verify all by invoking the eee_init function. + * In case of failure it will return an error. + */ + priv->eee_enabled = sxgbe_eee_init(priv); + if (!priv->eee_enabled) + return -EOPNOTSUPP; + + /* Do not change tx_lpi_timer in case of failure */ + priv->tx_lpi_timer = edata->tx_lpi_timer; + } + + return phy_ethtool_set_eee(priv->phydev, edata); +} + static const struct ethtool_ops sxgbe_ethtool_ops = { + .get_eee = sxgbe_ethtool_get_eee, + .set_eee = sxgbe_ethtool_set_eee, }; void sxgbe_set_ethtool_ops(struct net_device *netdev) diff --git a/drivers/net/ethernet/samsung/sxgbe_main.c b/drivers/net/ethernet/samsung/sxgbe_main.c index 857048e..cd09cdd 100644 --- a/drivers/net/ethernet/samsung/sxgbe_main.c +++ b/drivers/net/ethernet/samsung/sxgbe_main.c @@ -64,6 +64,7 @@ static int pause = SXGBE_PAUSE_TIME; static int tx_tc = TC_DEFAULT; static int rx_tc = TC_DEFAULT; static int buf_sz = DMA_BUFFER_SIZE; +static int eee_timer = SXGBE_DEFAULT_LPI_TIMER; module_param(watchdog, int, S_IRUGO | S_IWUSR); module_param(debug, int, S_IRUGO | S_IWUSR); @@ -75,6 +76,7 @@ module_param(pause, int, S_IRUGO | S_IWUSR); module_param(tx_tc, int, S_IRUGO | S_IWUSR); module_param(rx_tc, int, S_IRUGO | S_IWUSR); module_param(buf_sz, int, S_IRUGO | S_IWUSR); +module_param(eee_timer, int, S_IRUGO | S_IWUSR); static const u32 default_msg_level = (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK | NETIF_MSG_IFUP | @@ -86,6 +88,8 @@ static irqreturn_t sxgbe_rx_interrupt(int irq, void *dev_id); #define SXGBE_COAL_TIMER(x) (jiffies + usecs_to_jiffies(x)) +#define SXGBE_LPI_TIMER(x) (jiffies + msecs_to_jiffies(x)) + /** * sxgbe_verify_args - verify the driver parameters. * Description: it verifies if some wrong parameter is passed to the driver. @@ -107,6 +111,86 @@ static void sxgbe_verify_args(void) flow_ctrl = SXGBE_FLOW_OFF; if (unlikely((pause < 0) || (pause > 0xffff))) pause = SXGBE_PAUSE_TIME; + if (unlikely(eee_timer < 0)) + eee_timer = SXGBE_DEFAULT_LPI_TIMER; +} + +static void sxgbe_enable_eee_mode(const struct sxgbe_priv_data *priv) +{ + /* Check and enter in LPI mode */ + if (!priv->tx_path_in_lpi_mode) + priv->hw->mac->set_eee_mode(priv->ioaddr); +} + +void sxgbe_disable_eee_mode(struct sxgbe_priv_data * const priv) +{ + /* Exit and disable EEE in case of we are are in LPI state. */ + priv->hw->mac->reset_eee_mode(priv->ioaddr); + del_timer_sync(&priv->eee_ctrl_timer); + priv->tx_path_in_lpi_mode = false; +} + +/** + * sxgbe_eee_ctrl_timer + * @arg : data hook + * Description: + * If there is no data transfer and if we are not in LPI state, + * then MAC Transmitter can be moved to LPI state. + */ +static void sxgbe_eee_ctrl_timer(unsigned long arg) +{ + struct sxgbe_priv_data *priv = (struct sxgbe_priv_data *)arg; + + sxgbe_enable_eee_mode(priv); + mod_timer(&priv->eee_ctrl_timer, SXGBE_LPI_TIMER(eee_timer)); +} + +/** + * sxgbe_eee_init + * @priv: private device pointer + * Description: + * If the EEE support has been enabled while configuring the driver, + * if the GMAC actually supports the EEE (from the HW cap reg) and the + * phy can also manage EEE, so enable the LPI state and start the timer + * to verify if the tx path can enter in LPI state. + */ +bool sxgbe_eee_init(struct sxgbe_priv_data * const priv) +{ + bool ret = false; + + /* MAC core supports the EEE feature. */ + if (priv->hw_cap.eee) { + /* Check if the PHY supports EEE */ + if (phy_init_eee(priv->phydev, 1)) + return false; + + priv->eee_active = 1; + init_timer(&priv->eee_ctrl_timer); + priv->eee_ctrl_timer.function = sxgbe_eee_ctrl_timer; + priv->eee_ctrl_timer.data = (unsigned long)priv; + priv->eee_ctrl_timer.expires = SXGBE_LPI_TIMER(eee_timer); + add_timer(&priv->eee_ctrl_timer); + + priv->hw->mac->set_eee_timer(priv->ioaddr, + SXGBE_DEFAULT_LPI_TIMER, + priv->tx_lpi_timer); + + pr_info("Energy-Efficient Ethernet initialized\n"); + + ret = true; + } + + return ret; +} + +static void sxgbe_eee_adjust(const struct sxgbe_priv_data *priv) +{ + /* When the EEE has been already initialised we have to + * modify the PLS bit in the LPI ctrl & status reg according + * to the PHY link status. For this reason. + */ + if (priv->eee_enabled) + priv->hw->mac->set_eee_pls(priv->ioaddr, priv->phydev->link); } /** @@ -210,6 +294,9 @@ static void sxgbe_adjust_link(struct net_device *dev) if (new_state & netif_msg_link(priv)) phy_print_status(phydev); + + /* Alter the MAC settings for EEE */ + sxgbe_eee_adjust(priv); } /** @@ -742,7 +829,7 @@ static void sxgbe_tx_queue_clean(struct sxgbe_tx_queue *tqueue) * @priv: driver private structure * Description: it reclaims resources after transmission completes. */ -static void sxgbe_tx_all_clean(struct sxgbe_priv_data *priv) +static void sxgbe_tx_all_clean(struct sxgbe_priv_data * const priv) { u8 queue_num; @@ -750,6 +837,11 @@ static void sxgbe_tx_all_clean(struct sxgbe_priv_data *priv) struct sxgbe_tx_queue *tqueue = priv->txq[queue_num]; sxgbe_tx_queue_clean(tqueue); } + + if ((priv->eee_enabled) && (!priv->tx_path_in_lpi_mode)) { + sxgbe_enable_eee_mode(priv); + mod_timer(&priv->eee_ctrl_timer, SXGBE_LPI_TIMER(eee_timer)); + } } /** @@ -836,6 +928,7 @@ static int sxgbe_get_hw_features(struct sxgbe_priv_data * const priv) features->multi_macaddr = SXGBE_HW_FEAT_MACADDR_COUNT(rval); features->tstamp_srcselect = SXGBE_HW_FEAT_TSTMAP_SRC(rval); features->sa_vlan_insert = SXGBE_HW_FEAT_SRCADDR_VLAN(rval); + features->eee = SXGBE_HW_FEAT_EEE(rval); } /* Read First Capability Register CAP[1] */ rval = priv->hw->mac->get_hw_feature(priv->ioaddr, 1); @@ -1053,6 +1146,20 @@ static int sxgbe_open(struct net_device *dev) goto init_error; } + /* If the LPI irq is different from the mac irq + * register a dedicated handler + */ + if (priv->lpi_irq != dev->irq) { + ret = devm_request_irq(priv->device, priv->lpi_irq, + sxgbe_common_interrupt, + IRQF_SHARED, dev->name, dev); + if (unlikely(ret < 0)) { + netdev_err(dev, "%s: ERROR: allocating the LPI IRQ %d (%d)\n", + __func__, priv->lpi_irq, ret); + goto init_error; + } + } + /* Request TX DMA irq lines */ SXGBE_FOR_EACH_QUEUE(SXGBE_TX_QUEUES, queue_num) { ret = devm_request_irq(priv->device, @@ -1108,6 +1215,9 @@ static int sxgbe_open(struct net_device *dev) priv->hw->dma->rx_watchdog(priv->ioaddr, SXGBE_MAX_DMA_RIWT); } + priv->tx_lpi_timer = SXGBE_DEFAULT_LPI_TIMER; + priv->eee_enabled = sxgbe_eee_init(priv); + napi_enable(&priv->napi); netif_start_queue(dev); @@ -1133,6 +1243,9 @@ static int sxgbe_release(struct net_device *dev) { struct sxgbe_priv_data *priv = netdev_priv(dev); + if (priv->eee_enabled) + del_timer_sync(&priv->eee_ctrl_timer); + /* Stop and disconnect the PHY */ if (priv->phydev) { phy_stop(priv->phydev); @@ -1226,6 +1339,9 @@ static netdev_tx_t sxgbe_xmit(struct sk_buff *skb, struct net_device *dev) /* get the spinlock */ spin_lock(&tqueue->tx_lock); + if (priv->tx_path_in_lpi_mode) + sxgbe_disable_eee_mode(priv); + if (unlikely(sxgbe_tx_avail(tqueue, tx_rsize) < nr_frags + 1)) { if (!netif_tx_queue_stopped(dev_txq)) { netif_tx_stop_queue(dev_txq); @@ -1504,6 +1620,25 @@ static void sxgbe_tx_timeout(struct net_device *dev) */ static irqreturn_t sxgbe_common_interrupt(int irq, void *dev_id) { + struct net_device *netdev = (struct net_device *)dev_id; + struct sxgbe_priv_data *priv = netdev_priv(netdev); + int status; + + status = priv->hw->mac->host_irq_status(priv->ioaddr, &priv->xstats); + /* For LPI we need to save the tx status */ + if (status & TX_ENTRY_LPI_MODE) { + priv->xstats.tx_lpi_entry_n++; + priv->tx_path_in_lpi_mode = true; + } + if (status & TX_EXIT_LPI_MODE) { + priv->xstats.tx_lpi_exit_n++; + priv->tx_path_in_lpi_mode = false; + } + if (status & RX_ENTRY_LPI_MODE) + priv->xstats.rx_lpi_entry_n++; + if (status & RX_EXIT_LPI_MODE) + priv->xstats.rx_lpi_exit_n++; + return IRQ_HANDLED; } @@ -2162,7 +2297,21 @@ module_exit(sxgbe_exit); #ifndef MODULE static int __init sxgbe_cmdline_opt(char *str) { + char *opt; + + if (!str || !*str) + return -EINVAL; + while ((opt = strsep(&str, ",")) != NULL) { + if (!strncmp(opt, "eee_timer:", 6)) { + if (kstrtoint(opt + 10, 0, &eee_timer)) + goto err; + } + } return 0; + +err: + pr_err("%s: ERROR broken module parameter conversion\n", __func__); + return -EINVAL; } __setup("sxgbeeth=", sxgbe_cmdline_opt); @@ -2182,6 +2331,7 @@ MODULE_PARM_DESC(pause, "Flow Control Pause Time"); MODULE_PARM_DESC(tx_tc, "TX MTL threshold control value"); MODULE_PARM_DESC(rx_tc, "RX MTL threshold control value"); MODULE_PARM_DESC(buf_sz, "DMA buffer size"); +MODULE_PARM_DESC(eee_timer, "EEE-LPI Default LS timer value"); MODULE_AUTHOR("Siva Reddy Kallam "); MODULE_AUTHOR("ByungHo An "); diff --git a/drivers/net/ethernet/samsung/sxgbe_platform.c b/drivers/net/ethernet/samsung/sxgbe_platform.c index 1a818a1..2e2cb46 100644 --- a/drivers/net/ethernet/samsung/sxgbe_platform.c +++ b/drivers/net/ethernet/samsung/sxgbe_platform.c @@ -167,6 +167,10 @@ static int sxgbe_platform_probe(struct platform_device *pdev) } } + priv->lpi_irq = irq_of_parse_and_map(dev->of_node, loop++); + if (priv->lpi_irq == -ENXIO) + priv->lpi_irq = priv->dev->irq; + platform_set_drvdata(pdev, priv->dev); pr_debug("platform driver registration completed\n"); diff --git a/drivers/net/ethernet/samsung/sxgbe_reg.h b/drivers/net/ethernet/samsung/sxgbe_reg.h index d1cd9ac..85a7b31 100644 --- a/drivers/net/ethernet/samsung/sxgbe_reg.h +++ b/drivers/net/ethernet/samsung/sxgbe_reg.h @@ -25,6 +25,11 @@ #define SXGBE_CORE_HASH_TABLE_REG5 0x0024 #define SXGBE_CORE_HASH_TABLE_REG6 0x0028 #define SXGBE_CORE_HASH_TABLE_REG7 0x002C + +/* EEE-LPI Registers */ +#define SXGBE_CORE_LPI_CTRL_STATUS 0x00D0 +#define SXGBE_CORE_LPI_TIMER_CTRL 0x00D4 + /* VLAN Specific Registers */ #define SXGBE_CORE_VLAN_TAG_REG 0x0050 #define SXGBE_CORE_VLAN_HASHTAB_REG 0x0058