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[209.132.180.67]) by mx.google.com with ESMTP id nv9si2376101pbb.245.2014.03.12.06.28.21; Wed, 12 Mar 2014 06:28:21 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of netdev-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754099AbaCLN2O (ORCPT + 4 others); Wed, 12 Mar 2014 09:28:14 -0400 Received: from mailout4.samsung.com ([203.254.224.34]:43027 "EHLO mailout4.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753294AbaCLN2L (ORCPT ); Wed, 12 Mar 2014 09:28:11 -0400 Received: from epcpsbgr3.samsung.com (u143.gpu120.samsung.co.kr [203.254.230.143]) by mailout4.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0N2B009HRS2RC0C0@mailout4.samsung.com>; Wed, 12 Mar 2014 22:28:03 +0900 (KST) Received: from epcpsbgm2.samsung.com ( [203.254.230.50]) by epcpsbgr3.samsung.com (EPCPMTA) with SMTP id A9.60.10092.3E060235; Wed, 12 Mar 2014 22:28:03 +0900 (KST) X-AuditID: cbfee68f-b7f156d00000276c-ff-532060e3f546 Received: from epmmp1.local.host ( [203.254.227.16]) by epcpsbgm2.samsung.com (EPCPMTA) with SMTP id 05.6D.28157.3E060235; Wed, 12 Mar 2014 22:28:03 +0900 (KST) Received: from DObh74an01 ([12.36.166.149]) by mmp1.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTPA id <0N2B007LBS2MGD00@mmp1.samsung.com>; Wed, 12 Mar 2014 22:28:03 +0900 (KST) From: Byungho An To: netdev@vger.kernel.org, linux-samsung-soc@vger.kernel.org Cc: davem@davemloft.net, ks.giri@samsung.com, ilho215.lee@samsung.com Subject: [PATCH V2 3/7] net: sxgbe: add EEE(Energy Efficient Ethernet) for Samsung sxgbe Date: Wed, 12 Mar 2014 22:28:03 +0900 Message-id: <005301cf3df6$e50c4730$af24d590$%an@samsung.com> MIME-version: 1.0 X-Mailer: Microsoft Office Outlook 12.0 Thread-index: Ac899uT2fQYriR4ZTN2aVny/qY1zng== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrEIsWRmVeSWpSXmKPExsVy+t8zI93HCQrBBj9apS3mnG9hsTj6byGj xfyjO5gsZpzfx2RxbIGYA6vHlpU3mTz6tqxi9Pi8SS6AOYrLJiU1J7MstUjfLoErY+mnaWwF U6cxVnw8MpG5gXFWTRcjB4eEgInEjXn+XYycQKaYxIV769m6GLk4hASWMUp0PD/PAlNz8bgb RHwRo8TiHUuZIZzfjBKnN9xmAulmE1CTaJ55mQ3EFhGwlVhy5DM7SDOzgKtEzw0NkLCwQJTE pZ4nLCA2i4CqxN3uLmYQm1fARmL1qvOMELagxI/J98BqmAW0JNbvPM4EYctLbF7zlhniHnWJ R391QUwRAT2Jyb0qEBUiEvtevGMEuUxCYBu7xLQX3ewQqwQkvk0+BPWKrMSmA8wQ70pKHFxx g2UCo9gsJItnIVk8C8niWUhWLGBkWcUomlqQXFCclF5krFecmFtcmpeul5yfu4kREl/9Oxjv HrA+xJgMtH4is5Rocj4wPvNK4g2NzYwsTE1MjY3MLc1IE1YS573/MClISCA9sSQ1OzW1ILUo vqg0J7X4ECMTB6dUA+PKuMuLT71X/nyI9SSzmdia49vyvm+aFClYG9kwo+i6Zk1qxq73E5lU jnwvTrCQmPo1SZ5Jo+l7d8N280Wqv1d0fp8gY1XVrRq0Im5RrsYurfNP4stPa2/7WajUe0Wr 7ckH+6AISRvzM4KKduoN8zznXv0r+XiDVevJ50t5L/XaXlod82pZ5hslluKMREMt5qLiRADs A502xQIAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprAKsWRmVeSWpSXmKPExsVy+t9jAd3HCQrBBscbhC3mnG9hsTj6byGj xfyjO5gsZpzfx2RxbIGYA6vHlpU3mTz6tqxi9Pi8SS6AOaqB0SYjNTEltUghNS85PyUzL91W yTs43jne1MzAUNfQ0sJcSSEvMTfVVsnFJ0DXLTMHaKWSQlliTilQKCCxuFhJ3w7ThNAQN10L mMYIXd+QILgeIwM0kLCOMWPpp2lsBVOnMVZ8PDKRuYFxVk0XIweHhICJxMXjbl2MnECmmMSF e+vZuhi5OIQEFjFKLN6xlBnC+c0ocXrDbSaQKjYBNYnmmZfZQGwRAVuJJUc+s4MMYhZwlei5 oQESFhaIkrjU84QFxGYRUJW4293FDGLzCthIrF51nhHCFpT4MfkeWA2zgJbE+p3HmSBseYnN a94yQ9ymLvHory6IKSKgJzG5VwWiQkRi34t3jBMYBWYhGTQLyaBZSAbNQtKygJFlFaNoakFy QXFSeq6RXnFibnFpXrpecn7uJkZw/D6T3sG4qsHiEKMAB6MSD+9CTflgIdbEsuLK3EOMEhzM SiK8y6IUgoV4UxIrq1KL8uOLSnNSiw8xJgP9OZFZSjQ5H5ha8kriDY1NzIwsjcwsjEzMzUkT VhLnPdhqHSgkkJ5YkpqdmlqQWgSzhYmDU6qBsVhTLCjqkUFRgJNH/a3UMPvDQW9UneW5LpcV KL6a/G5WwzWRVYyS+zkeGp4Tyvc+v8XpdyO75cL6IOUp5wM3TV+hf+TDltIWjuPFGvzrJhrU KNQ+UmJc1RIw8+jDyf9912j3fli6r1EnzLCzmu1K7QqpxPfX5dtXVuU/Wf4zrmCt0ZxDi+Nc lViKMxINtZiLihMBL7nLCyMDAAA= DLP-Filter: Pass X-MTR: 20000000000000000@CPGS X-CFilter-Loop: Reflected Sender: netdev-owner@vger.kernel.org Precedence: list List-ID: X-Mailing-List: netdev@vger.kernel.org X-Removed-Original-Auth: Dkim didn't pass. X-Original-Sender: bh74.an@samsung.com X-Original-Authentication-Results: mx.google.com; spf=neutral (google.com: 209.85.128.172 is neither permitted nor denied by best guess record for domain of patch+caf_=patchwork-forward=linaro.org@linaro.org) smtp.mail=patch+caf_=patchwork-forward=linaro.org@linaro.org Mailing-list: list patchwork-forward@linaro.org; contact patchwork-forward+owners@linaro.org X-Google-Group-Id: 836684582541 List-Post: , List-Help: , List-Archive: List-Unsubscribe: , Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7bit Content-language: ko 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 5ebf6bd..1d848ce 100644 --- a/drivers/net/ethernet/samsung/sxgbe_common.h +++ b/drivers/net/ethernet/samsung/sxgbe_common.h @@ -118,6 +118,33 @@ 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), @@ -202,6 +229,13 @@ 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; @@ -310,6 +344,13 @@ 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); @@ -371,6 +412,8 @@ 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; @@ -451,6 +494,14 @@ 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 */ @@ -473,4 +524,7 @@ 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 6b115b1..3c4058d 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 f3e56a8..bf692e3 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 83b6e27..3753329 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 10c74b8..82250f9 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 b4093fb..1a2e655 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