| /******************************************************************************* |
| This is the driver for the ST MAC 10/100/1000 on-chip Ethernet controllers. |
| ST Ethernet IPs are built around a Synopsys IP Core. |
| |
| Copyright(C) 2007-2011 STMicroelectronics Ltd |
| |
| This program is free software; you can redistribute it and/or modify it |
| under the terms and conditions of the GNU General Public License, |
| version 2, as published by the Free Software Foundation. |
| |
| This program is distributed in the hope it will be useful, but WITHOUT |
| ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| more details. |
| |
| You should have received a copy of the GNU General Public License along with |
| this program; if not, write to the Free Software Foundation, Inc., |
| 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. |
| |
| The full GNU General Public License is included in this distribution in |
| the file called "COPYING". |
| |
| Author: Giuseppe Cavallaro <peppe.cavallaro@st.com> |
| |
| Documentation available at: |
| http://www.stlinux.com |
| Support available at: |
| https://bugzilla.stlinux.com/ |
| *******************************************************************************/ |
| |
| #include <linux/clk.h> |
| #include <linux/kernel.h> |
| #include <linux/interrupt.h> |
| #include <linux/ip.h> |
| #include <linux/tcp.h> |
| #include <linux/skbuff.h> |
| #include <linux/ethtool.h> |
| #include <linux/if_ether.h> |
| #include <linux/crc32.h> |
| #include <linux/mii.h> |
| #include <linux/if.h> |
| #include <linux/if_vlan.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/slab.h> |
| #include <linux/prefetch.h> |
| #include <linux/pinctrl/consumer.h> |
| #ifdef CONFIG_DEBUG_FS |
| #include <linux/debugfs.h> |
| #include <linux/seq_file.h> |
| #endif /* CONFIG_DEBUG_FS */ |
| #include <linux/net_tstamp.h> |
| #include "stmmac_ptp.h" |
| #include "stmmac.h" |
| #include <linux/reset.h> |
| #include <linux/of_mdio.h> |
| #include "dwmac1000.h" |
| |
| #define STMMAC_ALIGN(x) L1_CACHE_ALIGN(x) |
| |
| /* Module parameters */ |
| #define TX_TIMEO 5000 |
| static int watchdog = TX_TIMEO; |
| module_param(watchdog, int, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(watchdog, "Transmit timeout in milliseconds (default 5s)"); |
| |
| static int debug = -1; |
| module_param(debug, int, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(debug, "Message Level (-1: default, 0: no output, 16: all)"); |
| |
| static int phyaddr = -1; |
| module_param(phyaddr, int, S_IRUGO); |
| MODULE_PARM_DESC(phyaddr, "Physical device address"); |
| |
| #define STMMAC_TX_THRESH (DMA_TX_SIZE / 4) |
| #define STMMAC_RX_THRESH (DMA_RX_SIZE / 4) |
| |
| static int flow_ctrl = FLOW_OFF; |
| module_param(flow_ctrl, int, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(flow_ctrl, "Flow control ability [on/off]"); |
| |
| static int pause = PAUSE_TIME; |
| module_param(pause, int, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(pause, "Flow Control Pause Time"); |
| |
| #define TC_DEFAULT 64 |
| static int tc = TC_DEFAULT; |
| module_param(tc, int, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(tc, "DMA threshold control value"); |
| |
| #define DEFAULT_BUFSIZE 1536 |
| static int buf_sz = DEFAULT_BUFSIZE; |
| module_param(buf_sz, int, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(buf_sz, "DMA buffer size"); |
| |
| #define STMMAC_RX_COPYBREAK 256 |
| |
| static const u32 default_msg_level = (NETIF_MSG_DRV | NETIF_MSG_PROBE | |
| NETIF_MSG_LINK | NETIF_MSG_IFUP | |
| NETIF_MSG_IFDOWN | NETIF_MSG_TIMER); |
| |
| #define STMMAC_DEFAULT_LPI_TIMER 1000 |
| static int eee_timer = STMMAC_DEFAULT_LPI_TIMER; |
| module_param(eee_timer, int, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(eee_timer, "LPI tx expiration time in msec"); |
| #define STMMAC_LPI_T(x) (jiffies + msecs_to_jiffies(x)) |
| |
| /* By default the driver will use the ring mode to manage tx and rx descriptors |
| * but passing this value so user can force to use the chain instead of the ring |
| */ |
| static unsigned int chain_mode; |
| module_param(chain_mode, int, S_IRUGO); |
| MODULE_PARM_DESC(chain_mode, "To use chain instead of ring mode"); |
| |
| static irqreturn_t stmmac_interrupt(int irq, void *dev_id); |
| |
| #ifdef CONFIG_DEBUG_FS |
| static int stmmac_init_fs(struct net_device *dev); |
| static void stmmac_exit_fs(struct net_device *dev); |
| #endif |
| |
| #define STMMAC_COAL_TIMER(x) (jiffies + usecs_to_jiffies(x)) |
| |
| /** |
| * stmmac_verify_args - verify the driver parameters. |
| * Description: it checks the driver parameters and set a default in case of |
| * errors. |
| */ |
| static void stmmac_verify_args(void) |
| { |
| if (unlikely(watchdog < 0)) |
| watchdog = TX_TIMEO; |
| if (unlikely((buf_sz < DEFAULT_BUFSIZE) || (buf_sz > BUF_SIZE_16KiB))) |
| buf_sz = DEFAULT_BUFSIZE; |
| if (unlikely(flow_ctrl > 1)) |
| flow_ctrl = FLOW_AUTO; |
| else if (likely(flow_ctrl < 0)) |
| flow_ctrl = FLOW_OFF; |
| if (unlikely((pause < 0) || (pause > 0xffff))) |
| pause = PAUSE_TIME; |
| if (eee_timer < 0) |
| eee_timer = STMMAC_DEFAULT_LPI_TIMER; |
| } |
| |
| /** |
| * stmmac_clk_csr_set - dynamically set the MDC clock |
| * @priv: driver private structure |
| * Description: this is to dynamically set the MDC clock according to the csr |
| * clock input. |
| * Note: |
| * If a specific clk_csr value is passed from the platform |
| * this means that the CSR Clock Range selection cannot be |
| * changed at run-time and it is fixed (as reported in the driver |
| * documentation). Viceversa the driver will try to set the MDC |
| * clock dynamically according to the actual clock input. |
| */ |
| static void stmmac_clk_csr_set(struct stmmac_priv *priv) |
| { |
| u32 clk_rate; |
| |
| clk_rate = clk_get_rate(priv->stmmac_clk); |
| |
| /* Platform provided default clk_csr would be assumed valid |
| * for all other cases except for the below mentioned ones. |
| * For values higher than the IEEE 802.3 specified frequency |
| * we can not estimate the proper divider as it is not known |
| * the frequency of clk_csr_i. So we do not change the default |
| * divider. |
| */ |
| if (!(priv->clk_csr & MAC_CSR_H_FRQ_MASK)) { |
| if (clk_rate < CSR_F_35M) |
| priv->clk_csr = STMMAC_CSR_20_35M; |
| else if ((clk_rate >= CSR_F_35M) && (clk_rate < CSR_F_60M)) |
| priv->clk_csr = STMMAC_CSR_35_60M; |
| else if ((clk_rate >= CSR_F_60M) && (clk_rate < CSR_F_100M)) |
| priv->clk_csr = STMMAC_CSR_60_100M; |
| else if ((clk_rate >= CSR_F_100M) && (clk_rate < CSR_F_150M)) |
| priv->clk_csr = STMMAC_CSR_100_150M; |
| else if ((clk_rate >= CSR_F_150M) && (clk_rate < CSR_F_250M)) |
| priv->clk_csr = STMMAC_CSR_150_250M; |
| else if ((clk_rate >= CSR_F_250M) && (clk_rate < CSR_F_300M)) |
| priv->clk_csr = STMMAC_CSR_250_300M; |
| } |
| } |
| |
| static void print_pkt(unsigned char *buf, int len) |
| { |
| pr_debug("len = %d byte, buf addr: 0x%p\n", len, buf); |
| print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, buf, len); |
| } |
| |
| static inline u32 stmmac_tx_avail(struct stmmac_priv *priv) |
| { |
| unsigned avail; |
| |
| if (priv->dirty_tx > priv->cur_tx) |
| avail = priv->dirty_tx - priv->cur_tx - 1; |
| else |
| avail = DMA_TX_SIZE - priv->cur_tx + priv->dirty_tx - 1; |
| |
| return avail; |
| } |
| |
| static inline u32 stmmac_rx_dirty(struct stmmac_priv *priv) |
| { |
| unsigned dirty; |
| |
| if (priv->dirty_rx <= priv->cur_rx) |
| dirty = priv->cur_rx - priv->dirty_rx; |
| else |
| dirty = DMA_RX_SIZE - priv->dirty_rx + priv->cur_rx; |
| |
| return dirty; |
| } |
| |
| /** |
| * stmmac_hw_fix_mac_speed - callback for speed selection |
| * @priv: driver private structure |
| * Description: on some platforms (e.g. ST), some HW system configuraton |
| * registers have to be set according to the link speed negotiated. |
| */ |
| static inline void stmmac_hw_fix_mac_speed(struct stmmac_priv *priv) |
| { |
| struct phy_device *phydev = priv->phydev; |
| |
| if (likely(priv->plat->fix_mac_speed)) |
| priv->plat->fix_mac_speed(priv->plat->bsp_priv, phydev->speed); |
| } |
| |
| /** |
| * stmmac_enable_eee_mode - check and enter in LPI mode |
| * @priv: driver private structure |
| * Description: this function is to verify and enter in LPI mode in case of |
| * EEE. |
| */ |
| static void stmmac_enable_eee_mode(struct stmmac_priv *priv) |
| { |
| /* Check and enter in LPI mode */ |
| if ((priv->dirty_tx == priv->cur_tx) && |
| (priv->tx_path_in_lpi_mode == false)) |
| priv->hw->mac->set_eee_mode(priv->hw); |
| } |
| |
| /** |
| * stmmac_disable_eee_mode - disable and exit from LPI mode |
| * @priv: driver private structure |
| * Description: this function is to exit and disable EEE in case of |
| * LPI state is true. This is called by the xmit. |
| */ |
| void stmmac_disable_eee_mode(struct stmmac_priv *priv) |
| { |
| priv->hw->mac->reset_eee_mode(priv->hw); |
| del_timer_sync(&priv->eee_ctrl_timer); |
| priv->tx_path_in_lpi_mode = false; |
| } |
| |
| /** |
| * stmmac_eee_ctrl_timer - EEE TX SW 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 stmmac_eee_ctrl_timer(unsigned long arg) |
| { |
| struct stmmac_priv *priv = (struct stmmac_priv *)arg; |
| |
| stmmac_enable_eee_mode(priv); |
| mod_timer(&priv->eee_ctrl_timer, STMMAC_LPI_T(eee_timer)); |
| } |
| |
| /** |
| * stmmac_eee_init - init EEE |
| * @priv: driver private structure |
| * Description: |
| * if the GMAC supports the EEE (from the HW cap reg) and the phy device |
| * can also manage EEE, this function enable the LPI state and start related |
| * timer. |
| */ |
| bool stmmac_eee_init(struct stmmac_priv *priv) |
| { |
| char *phy_bus_name = priv->plat->phy_bus_name; |
| unsigned long flags; |
| bool ret = false; |
| |
| /* Using PCS we cannot dial with the phy registers at this stage |
| * so we do not support extra feature like EEE. |
| */ |
| if ((priv->pcs == STMMAC_PCS_RGMII) || (priv->pcs == STMMAC_PCS_TBI) || |
| (priv->pcs == STMMAC_PCS_RTBI)) |
| goto out; |
| |
| /* Never init EEE in case of a switch is attached */ |
| if (phy_bus_name && (!strcmp(phy_bus_name, "fixed"))) |
| goto out; |
| |
| /* MAC core supports the EEE feature. */ |
| if (priv->dma_cap.eee) { |
| int tx_lpi_timer = priv->tx_lpi_timer; |
| |
| /* Check if the PHY supports EEE */ |
| if (phy_init_eee(priv->phydev, 1)) { |
| /* To manage at run-time if the EEE cannot be supported |
| * anymore (for example because the lp caps have been |
| * changed). |
| * In that case the driver disable own timers. |
| */ |
| spin_lock_irqsave(&priv->lock, flags); |
| if (priv->eee_active) { |
| pr_debug("stmmac: disable EEE\n"); |
| del_timer_sync(&priv->eee_ctrl_timer); |
| priv->hw->mac->set_eee_timer(priv->hw, 0, |
| tx_lpi_timer); |
| } |
| priv->eee_active = 0; |
| spin_unlock_irqrestore(&priv->lock, flags); |
| goto out; |
| } |
| /* Activate the EEE and start timers */ |
| spin_lock_irqsave(&priv->lock, flags); |
| if (!priv->eee_active) { |
| priv->eee_active = 1; |
| setup_timer(&priv->eee_ctrl_timer, |
| stmmac_eee_ctrl_timer, |
| (unsigned long)priv); |
| mod_timer(&priv->eee_ctrl_timer, |
| STMMAC_LPI_T(eee_timer)); |
| |
| priv->hw->mac->set_eee_timer(priv->hw, |
| STMMAC_DEFAULT_LIT_LS, |
| tx_lpi_timer); |
| } |
| /* Set HW EEE according to the speed */ |
| priv->hw->mac->set_eee_pls(priv->hw, priv->phydev->link); |
| |
| ret = true; |
| spin_unlock_irqrestore(&priv->lock, flags); |
| |
| pr_debug("stmmac: Energy-Efficient Ethernet initialized\n"); |
| } |
| out: |
| return ret; |
| } |
| |
| /* stmmac_get_tx_hwtstamp - get HW TX timestamps |
| * @priv: driver private structure |
| * @entry : descriptor index to be used. |
| * @skb : the socket buffer |
| * Description : |
| * This function will read timestamp from the descriptor & pass it to stack. |
| * and also perform some sanity checks. |
| */ |
| static void stmmac_get_tx_hwtstamp(struct stmmac_priv *priv, |
| unsigned int entry, struct sk_buff *skb) |
| { |
| struct skb_shared_hwtstamps shhwtstamp; |
| u64 ns; |
| void *desc = NULL; |
| |
| if (!priv->hwts_tx_en) |
| return; |
| |
| /* exit if skb doesn't support hw tstamp */ |
| if (likely(!skb || !(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS))) |
| return; |
| |
| if (priv->adv_ts) |
| desc = (priv->dma_etx + entry); |
| else |
| desc = (priv->dma_tx + entry); |
| |
| /* check tx tstamp status */ |
| if (!priv->hw->desc->get_tx_timestamp_status((struct dma_desc *)desc)) |
| return; |
| |
| /* get the valid tstamp */ |
| ns = priv->hw->desc->get_timestamp(desc, priv->adv_ts); |
| |
| memset(&shhwtstamp, 0, sizeof(struct skb_shared_hwtstamps)); |
| shhwtstamp.hwtstamp = ns_to_ktime(ns); |
| /* pass tstamp to stack */ |
| skb_tstamp_tx(skb, &shhwtstamp); |
| |
| return; |
| } |
| |
| /* stmmac_get_rx_hwtstamp - get HW RX timestamps |
| * @priv: driver private structure |
| * @entry : descriptor index to be used. |
| * @skb : the socket buffer |
| * Description : |
| * This function will read received packet's timestamp from the descriptor |
| * and pass it to stack. It also perform some sanity checks. |
| */ |
| static void stmmac_get_rx_hwtstamp(struct stmmac_priv *priv, |
| unsigned int entry, struct sk_buff *skb) |
| { |
| struct skb_shared_hwtstamps *shhwtstamp = NULL; |
| u64 ns; |
| void *desc = NULL; |
| |
| if (!priv->hwts_rx_en) |
| return; |
| |
| if (priv->adv_ts) |
| desc = (priv->dma_erx + entry); |
| else |
| desc = (priv->dma_rx + entry); |
| |
| /* exit if rx tstamp is not valid */ |
| if (!priv->hw->desc->get_rx_timestamp_status(desc, priv->adv_ts)) |
| return; |
| |
| /* get valid tstamp */ |
| ns = priv->hw->desc->get_timestamp(desc, priv->adv_ts); |
| shhwtstamp = skb_hwtstamps(skb); |
| memset(shhwtstamp, 0, sizeof(struct skb_shared_hwtstamps)); |
| shhwtstamp->hwtstamp = ns_to_ktime(ns); |
| } |
| |
| /** |
| * stmmac_hwtstamp_ioctl - control hardware timestamping. |
| * @dev: device pointer. |
| * @ifr: An IOCTL specefic structure, that can contain a pointer to |
| * a proprietary structure used to pass information to the driver. |
| * Description: |
| * This function configures the MAC to enable/disable both outgoing(TX) |
| * and incoming(RX) packets time stamping based on user input. |
| * Return Value: |
| * 0 on success and an appropriate -ve integer on failure. |
| */ |
| static int stmmac_hwtstamp_ioctl(struct net_device *dev, struct ifreq *ifr) |
| { |
| struct stmmac_priv *priv = netdev_priv(dev); |
| struct hwtstamp_config config; |
| struct timespec64 now; |
| u64 temp = 0; |
| u32 ptp_v2 = 0; |
| u32 tstamp_all = 0; |
| u32 ptp_over_ipv4_udp = 0; |
| u32 ptp_over_ipv6_udp = 0; |
| u32 ptp_over_ethernet = 0; |
| u32 snap_type_sel = 0; |
| u32 ts_master_en = 0; |
| u32 ts_event_en = 0; |
| u32 value = 0; |
| u32 sec_inc; |
| |
| if (!(priv->dma_cap.time_stamp || priv->adv_ts)) { |
| netdev_alert(priv->dev, "No support for HW time stamping\n"); |
| priv->hwts_tx_en = 0; |
| priv->hwts_rx_en = 0; |
| |
| return -EOPNOTSUPP; |
| } |
| |
| if (copy_from_user(&config, ifr->ifr_data, |
| sizeof(struct hwtstamp_config))) |
| return -EFAULT; |
| |
| pr_debug("%s config flags:0x%x, tx_type:0x%x, rx_filter:0x%x\n", |
| __func__, config.flags, config.tx_type, config.rx_filter); |
| |
| /* reserved for future extensions */ |
| if (config.flags) |
| return -EINVAL; |
| |
| if (config.tx_type != HWTSTAMP_TX_OFF && |
| config.tx_type != HWTSTAMP_TX_ON) |
| return -ERANGE; |
| |
| if (priv->adv_ts) { |
| switch (config.rx_filter) { |
| case HWTSTAMP_FILTER_NONE: |
| /* time stamp no incoming packet at all */ |
| config.rx_filter = HWTSTAMP_FILTER_NONE; |
| break; |
| |
| case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: |
| /* PTP v1, UDP, any kind of event packet */ |
| config.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT; |
| /* take time stamp for all event messages */ |
| snap_type_sel = PTP_TCR_SNAPTYPSEL_1; |
| |
| ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA; |
| ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA; |
| break; |
| |
| case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: |
| /* PTP v1, UDP, Sync packet */ |
| config.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_SYNC; |
| /* take time stamp for SYNC messages only */ |
| ts_event_en = PTP_TCR_TSEVNTENA; |
| |
| ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA; |
| ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA; |
| break; |
| |
| case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: |
| /* PTP v1, UDP, Delay_req packet */ |
| config.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ; |
| /* take time stamp for Delay_Req messages only */ |
| ts_master_en = PTP_TCR_TSMSTRENA; |
| ts_event_en = PTP_TCR_TSEVNTENA; |
| |
| ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA; |
| ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA; |
| break; |
| |
| case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: |
| /* PTP v2, UDP, any kind of event packet */ |
| config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_EVENT; |
| ptp_v2 = PTP_TCR_TSVER2ENA; |
| /* take time stamp for all event messages */ |
| snap_type_sel = PTP_TCR_SNAPTYPSEL_1; |
| |
| ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA; |
| ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA; |
| break; |
| |
| case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: |
| /* PTP v2, UDP, Sync packet */ |
| config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_SYNC; |
| ptp_v2 = PTP_TCR_TSVER2ENA; |
| /* take time stamp for SYNC messages only */ |
| ts_event_en = PTP_TCR_TSEVNTENA; |
| |
| ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA; |
| ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA; |
| break; |
| |
| case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: |
| /* PTP v2, UDP, Delay_req packet */ |
| config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ; |
| ptp_v2 = PTP_TCR_TSVER2ENA; |
| /* take time stamp for Delay_Req messages only */ |
| ts_master_en = PTP_TCR_TSMSTRENA; |
| ts_event_en = PTP_TCR_TSEVNTENA; |
| |
| ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA; |
| ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA; |
| break; |
| |
| case HWTSTAMP_FILTER_PTP_V2_EVENT: |
| /* PTP v2/802.AS1 any layer, any kind of event packet */ |
| config.rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT; |
| ptp_v2 = PTP_TCR_TSVER2ENA; |
| /* take time stamp for all event messages */ |
| snap_type_sel = PTP_TCR_SNAPTYPSEL_1; |
| |
| ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA; |
| ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA; |
| ptp_over_ethernet = PTP_TCR_TSIPENA; |
| break; |
| |
| case HWTSTAMP_FILTER_PTP_V2_SYNC: |
| /* PTP v2/802.AS1, any layer, Sync packet */ |
| config.rx_filter = HWTSTAMP_FILTER_PTP_V2_SYNC; |
| ptp_v2 = PTP_TCR_TSVER2ENA; |
| /* take time stamp for SYNC messages only */ |
| ts_event_en = PTP_TCR_TSEVNTENA; |
| |
| ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA; |
| ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA; |
| ptp_over_ethernet = PTP_TCR_TSIPENA; |
| break; |
| |
| case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: |
| /* PTP v2/802.AS1, any layer, Delay_req packet */ |
| config.rx_filter = HWTSTAMP_FILTER_PTP_V2_DELAY_REQ; |
| ptp_v2 = PTP_TCR_TSVER2ENA; |
| /* take time stamp for Delay_Req messages only */ |
| ts_master_en = PTP_TCR_TSMSTRENA; |
| ts_event_en = PTP_TCR_TSEVNTENA; |
| |
| ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA; |
| ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA; |
| ptp_over_ethernet = PTP_TCR_TSIPENA; |
| break; |
| |
| case HWTSTAMP_FILTER_ALL: |
| /* time stamp any incoming packet */ |
| config.rx_filter = HWTSTAMP_FILTER_ALL; |
| tstamp_all = PTP_TCR_TSENALL; |
| break; |
| |
| default: |
| return -ERANGE; |
| } |
| } else { |
| switch (config.rx_filter) { |
| case HWTSTAMP_FILTER_NONE: |
| config.rx_filter = HWTSTAMP_FILTER_NONE; |
| break; |
| default: |
| /* PTP v1, UDP, any kind of event packet */ |
| config.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT; |
| break; |
| } |
| } |
| priv->hwts_rx_en = ((config.rx_filter == HWTSTAMP_FILTER_NONE) ? 0 : 1); |
| priv->hwts_tx_en = config.tx_type == HWTSTAMP_TX_ON; |
| |
| if (!priv->hwts_tx_en && !priv->hwts_rx_en) |
| priv->hw->ptp->config_hw_tstamping(priv->ioaddr, 0); |
| else { |
| value = (PTP_TCR_TSENA | PTP_TCR_TSCFUPDT | PTP_TCR_TSCTRLSSR | |
| tstamp_all | ptp_v2 | ptp_over_ethernet | |
| ptp_over_ipv6_udp | ptp_over_ipv4_udp | ts_event_en | |
| ts_master_en | snap_type_sel); |
| priv->hw->ptp->config_hw_tstamping(priv->ioaddr, value); |
| |
| /* program Sub Second Increment reg */ |
| sec_inc = priv->hw->ptp->config_sub_second_increment( |
| priv->ioaddr, priv->clk_ptp_rate); |
| temp = div_u64(1000000000ULL, sec_inc); |
| |
| /* calculate default added value: |
| * formula is : |
| * addend = (2^32)/freq_div_ratio; |
| * where, freq_div_ratio = 1e9ns/sec_inc |
| */ |
| temp = (u64)(temp << 32); |
| priv->default_addend = div_u64(temp, priv->clk_ptp_rate); |
| priv->hw->ptp->config_addend(priv->ioaddr, |
| priv->default_addend); |
| |
| /* initialize system time */ |
| ktime_get_real_ts64(&now); |
| |
| /* lower 32 bits of tv_sec are safe until y2106 */ |
| priv->hw->ptp->init_systime(priv->ioaddr, (u32)now.tv_sec, |
| now.tv_nsec); |
| } |
| |
| return copy_to_user(ifr->ifr_data, &config, |
| sizeof(struct hwtstamp_config)) ? -EFAULT : 0; |
| } |
| |
| /** |
| * stmmac_init_ptp - init PTP |
| * @priv: driver private structure |
| * Description: this is to verify if the HW supports the PTPv1 or PTPv2. |
| * This is done by looking at the HW cap. register. |
| * This function also registers the ptp driver. |
| */ |
| static int stmmac_init_ptp(struct stmmac_priv *priv) |
| { |
| if (!(priv->dma_cap.time_stamp || priv->dma_cap.atime_stamp)) |
| return -EOPNOTSUPP; |
| |
| /* Fall-back to main clock in case of no PTP ref is passed */ |
| priv->clk_ptp_ref = devm_clk_get(priv->device, "clk_ptp_ref"); |
| if (IS_ERR(priv->clk_ptp_ref)) { |
| priv->clk_ptp_rate = clk_get_rate(priv->stmmac_clk); |
| priv->clk_ptp_ref = NULL; |
| } else { |
| clk_prepare_enable(priv->clk_ptp_ref); |
| priv->clk_ptp_rate = clk_get_rate(priv->clk_ptp_ref); |
| } |
| |
| priv->adv_ts = 0; |
| if (priv->dma_cap.atime_stamp && priv->extend_desc) |
| priv->adv_ts = 1; |
| |
| if (netif_msg_hw(priv) && priv->dma_cap.time_stamp) |
| pr_debug("IEEE 1588-2002 Time Stamp supported\n"); |
| |
| if (netif_msg_hw(priv) && priv->adv_ts) |
| pr_debug("IEEE 1588-2008 Advanced Time Stamp supported\n"); |
| |
| priv->hw->ptp = &stmmac_ptp; |
| priv->hwts_tx_en = 0; |
| priv->hwts_rx_en = 0; |
| |
| return stmmac_ptp_register(priv); |
| } |
| |
| static void stmmac_release_ptp(struct stmmac_priv *priv) |
| { |
| if (priv->clk_ptp_ref) |
| clk_disable_unprepare(priv->clk_ptp_ref); |
| stmmac_ptp_unregister(priv); |
| } |
| |
| /** |
| * stmmac_adjust_link - adjusts the link parameters |
| * @dev: net device structure |
| * Description: this is the helper called by the physical abstraction layer |
| * drivers to communicate the phy link status. According the speed and duplex |
| * this driver can invoke registered glue-logic as well. |
| * It also invoke the eee initialization because it could happen when switch |
| * on different networks (that are eee capable). |
| */ |
| static void stmmac_adjust_link(struct net_device *dev) |
| { |
| struct stmmac_priv *priv = netdev_priv(dev); |
| struct phy_device *phydev = priv->phydev; |
| unsigned long flags; |
| int new_state = 0; |
| unsigned int fc = priv->flow_ctrl, pause_time = priv->pause; |
| |
| if (phydev == NULL) |
| return; |
| |
| spin_lock_irqsave(&priv->lock, flags); |
| |
| if (phydev->link) { |
| u32 ctrl = readl(priv->ioaddr + MAC_CTRL_REG); |
| |
| /* Now we make sure that we can be in full duplex mode. |
| * If not, we operate in half-duplex mode. */ |
| if (phydev->duplex != priv->oldduplex) { |
| new_state = 1; |
| if (!(phydev->duplex)) |
| ctrl &= ~priv->hw->link.duplex; |
| else |
| ctrl |= priv->hw->link.duplex; |
| priv->oldduplex = phydev->duplex; |
| } |
| /* Flow Control operation */ |
| if (phydev->pause) |
| priv->hw->mac->flow_ctrl(priv->hw, phydev->duplex, |
| fc, pause_time); |
| |
| if (phydev->speed != priv->speed) { |
| new_state = 1; |
| switch (phydev->speed) { |
| case 1000: |
| if (likely(priv->plat->has_gmac)) |
| ctrl &= ~priv->hw->link.port; |
| stmmac_hw_fix_mac_speed(priv); |
| break; |
| case 100: |
| case 10: |
| if (priv->plat->has_gmac) { |
| ctrl |= priv->hw->link.port; |
| if (phydev->speed == SPEED_100) { |
| ctrl |= priv->hw->link.speed; |
| } else { |
| ctrl &= ~(priv->hw->link.speed); |
| } |
| } else { |
| ctrl &= ~priv->hw->link.port; |
| } |
| stmmac_hw_fix_mac_speed(priv); |
| break; |
| default: |
| if (netif_msg_link(priv)) |
| pr_warn("%s: Speed (%d) not 10/100\n", |
| dev->name, phydev->speed); |
| break; |
| } |
| |
| priv->speed = phydev->speed; |
| } |
| |
| writel(ctrl, priv->ioaddr + MAC_CTRL_REG); |
| |
| if (!priv->oldlink) { |
| new_state = 1; |
| priv->oldlink = 1; |
| } |
| } else if (priv->oldlink) { |
| new_state = 1; |
| priv->oldlink = 0; |
| priv->speed = 0; |
| priv->oldduplex = -1; |
| } |
| |
| if (new_state && netif_msg_link(priv)) |
| phy_print_status(phydev); |
| |
| spin_unlock_irqrestore(&priv->lock, flags); |
| |
| /* At this stage, it could be needed to setup the EEE or adjust some |
| * MAC related HW registers. |
| */ |
| priv->eee_enabled = stmmac_eee_init(priv); |
| } |
| |
| /** |
| * stmmac_check_pcs_mode - verify if RGMII/SGMII is supported |
| * @priv: driver private structure |
| * Description: this is to verify if the HW supports the PCS. |
| * Physical Coding Sublayer (PCS) interface that can be used when the MAC is |
| * configured for the TBI, RTBI, or SGMII PHY interface. |
| */ |
| static void stmmac_check_pcs_mode(struct stmmac_priv *priv) |
| { |
| int interface = priv->plat->interface; |
| |
| if (priv->dma_cap.pcs) { |
| if ((interface == PHY_INTERFACE_MODE_RGMII) || |
| (interface == PHY_INTERFACE_MODE_RGMII_ID) || |
| (interface == PHY_INTERFACE_MODE_RGMII_RXID) || |
| (interface == PHY_INTERFACE_MODE_RGMII_TXID)) { |
| pr_debug("STMMAC: PCS RGMII support enable\n"); |
| priv->pcs = STMMAC_PCS_RGMII; |
| } else if (interface == PHY_INTERFACE_MODE_SGMII) { |
| pr_debug("STMMAC: PCS SGMII support enable\n"); |
| priv->pcs = STMMAC_PCS_SGMII; |
| } |
| } |
| } |
| |
| /** |
| * stmmac_init_phy - PHY initialization |
| * @dev: net device structure |
| * Description: it initializes the driver's PHY state, and attaches the PHY |
| * to the mac driver. |
| * Return value: |
| * 0 on success |
| */ |
| static int stmmac_init_phy(struct net_device *dev) |
| { |
| struct stmmac_priv *priv = netdev_priv(dev); |
| struct phy_device *phydev; |
| char phy_id_fmt[MII_BUS_ID_SIZE + 3]; |
| char bus_id[MII_BUS_ID_SIZE]; |
| int interface = priv->plat->interface; |
| int max_speed = priv->plat->max_speed; |
| priv->oldlink = 0; |
| priv->speed = 0; |
| priv->oldduplex = -1; |
| |
| if (priv->plat->phy_node) { |
| phydev = of_phy_connect(dev, priv->plat->phy_node, |
| &stmmac_adjust_link, 0, interface); |
| } else { |
| if (priv->plat->phy_bus_name) |
| snprintf(bus_id, MII_BUS_ID_SIZE, "%s-%x", |
| priv->plat->phy_bus_name, priv->plat->bus_id); |
| else |
| snprintf(bus_id, MII_BUS_ID_SIZE, "stmmac-%x", |
| priv->plat->bus_id); |
| |
| snprintf(phy_id_fmt, MII_BUS_ID_SIZE + 3, PHY_ID_FMT, bus_id, |
| priv->plat->phy_addr); |
| pr_debug("stmmac_init_phy: trying to attach to %s\n", |
| phy_id_fmt); |
| |
| phydev = phy_connect(dev, phy_id_fmt, &stmmac_adjust_link, |
| interface); |
| } |
| |
| if (IS_ERR_OR_NULL(phydev)) { |
| pr_err("%s: Could not attach to PHY\n", dev->name); |
| if (!phydev) |
| return -ENODEV; |
| |
| return PTR_ERR(phydev); |
| } |
| |
| /* Stop Advertising 1000BASE Capability if interface is not GMII */ |
| if ((interface == PHY_INTERFACE_MODE_MII) || |
| (interface == PHY_INTERFACE_MODE_RMII) || |
| (max_speed < 1000 && max_speed > 0)) |
| phydev->advertising &= ~(SUPPORTED_1000baseT_Half | |
| SUPPORTED_1000baseT_Full); |
| |
| /* |
| * Broken HW is sometimes missing the pull-up resistor on the |
| * MDIO line, which results in reads to non-existent devices returning |
| * 0 rather than 0xffff. Catch this here and treat 0 as a non-existent |
| * device as well. |
| * Note: phydev->phy_id is the result of reading the UID PHY registers. |
| */ |
| if (!priv->plat->phy_node && phydev->phy_id == 0) { |
| phy_disconnect(phydev); |
| return -ENODEV; |
| } |
| |
| /* If attached to a switch, there is no reason to poll phy handler */ |
| if (priv->plat->phy_bus_name) |
| if (!strcmp(priv->plat->phy_bus_name, "fixed")) |
| phydev->irq = PHY_IGNORE_INTERRUPT; |
| |
| pr_debug("stmmac_init_phy: %s: attached to PHY (UID 0x%x)" |
| " Link = %d\n", dev->name, phydev->phy_id, phydev->link); |
| |
| priv->phydev = phydev; |
| |
| return 0; |
| } |
| |
| /** |
| * stmmac_display_ring - display ring |
| * @head: pointer to the head of the ring passed. |
| * @size: size of the ring. |
| * @extend_desc: to verify if extended descriptors are used. |
| * Description: display the control/status and buffer descriptors. |
| */ |
| static void stmmac_display_ring(void *head, int size, int extend_desc) |
| { |
| int i; |
| struct dma_extended_desc *ep = (struct dma_extended_desc *)head; |
| struct dma_desc *p = (struct dma_desc *)head; |
| |
| for (i = 0; i < size; i++) { |
| u64 x; |
| if (extend_desc) { |
| x = *(u64 *) ep; |
| pr_info("%d [0x%x]: 0x%x 0x%x 0x%x 0x%x\n", |
| i, (unsigned int)virt_to_phys(ep), |
| (unsigned int)x, (unsigned int)(x >> 32), |
| ep->basic.des2, ep->basic.des3); |
| ep++; |
| } else { |
| x = *(u64 *) p; |
| pr_info("%d [0x%x]: 0x%x 0x%x 0x%x 0x%x", |
| i, (unsigned int)virt_to_phys(p), |
| (unsigned int)x, (unsigned int)(x >> 32), |
| p->des2, p->des3); |
| p++; |
| } |
| pr_info("\n"); |
| } |
| } |
| |
| static void stmmac_display_rings(struct stmmac_priv *priv) |
| { |
| if (priv->extend_desc) { |
| pr_info("Extended RX descriptor ring:\n"); |
| stmmac_display_ring((void *)priv->dma_erx, DMA_RX_SIZE, 1); |
| pr_info("Extended TX descriptor ring:\n"); |
| stmmac_display_ring((void *)priv->dma_etx, DMA_TX_SIZE, 1); |
| } else { |
| pr_info("RX descriptor ring:\n"); |
| stmmac_display_ring((void *)priv->dma_rx, DMA_RX_SIZE, 0); |
| pr_info("TX descriptor ring:\n"); |
| stmmac_display_ring((void *)priv->dma_tx, DMA_TX_SIZE, 0); |
| } |
| } |
| |
| static int stmmac_set_bfsize(int mtu, int bufsize) |
| { |
| int ret = bufsize; |
| |
| if (mtu >= BUF_SIZE_4KiB) |
| ret = BUF_SIZE_8KiB; |
| else if (mtu >= BUF_SIZE_2KiB) |
| ret = BUF_SIZE_4KiB; |
| else if (mtu > DEFAULT_BUFSIZE) |
| ret = BUF_SIZE_2KiB; |
| else |
| ret = DEFAULT_BUFSIZE; |
| |
| return ret; |
| } |
| |
| /** |
| * stmmac_clear_descriptors - clear descriptors |
| * @priv: driver private structure |
| * Description: this function is called to clear the tx and rx descriptors |
| * in case of both basic and extended descriptors are used. |
| */ |
| static void stmmac_clear_descriptors(struct stmmac_priv *priv) |
| { |
| int i; |
| |
| /* Clear the Rx/Tx descriptors */ |
| for (i = 0; i < DMA_RX_SIZE; i++) |
| if (priv->extend_desc) |
| priv->hw->desc->init_rx_desc(&priv->dma_erx[i].basic, |
| priv->use_riwt, priv->mode, |
| (i == DMA_RX_SIZE - 1)); |
| else |
| priv->hw->desc->init_rx_desc(&priv->dma_rx[i], |
| priv->use_riwt, priv->mode, |
| (i == DMA_RX_SIZE - 1)); |
| for (i = 0; i < DMA_TX_SIZE; i++) |
| if (priv->extend_desc) |
| priv->hw->desc->init_tx_desc(&priv->dma_etx[i].basic, |
| priv->mode, |
| (i == DMA_TX_SIZE - 1)); |
| else |
| priv->hw->desc->init_tx_desc(&priv->dma_tx[i], |
| priv->mode, |
| (i == DMA_TX_SIZE - 1)); |
| } |
| |
| /** |
| * stmmac_init_rx_buffers - init the RX descriptor buffer. |
| * @priv: driver private structure |
| * @p: descriptor pointer |
| * @i: descriptor index |
| * @flags: gfp flag. |
| * Description: this function is called to allocate a receive buffer, perform |
| * the DMA mapping and init the descriptor. |
| */ |
| static int stmmac_init_rx_buffers(struct stmmac_priv *priv, struct dma_desc *p, |
| int i, gfp_t flags) |
| { |
| struct sk_buff *skb; |
| |
| skb = __netdev_alloc_skb_ip_align(priv->dev, priv->dma_buf_sz, flags); |
| if (!skb) { |
| pr_err("%s: Rx init fails; skb is NULL\n", __func__); |
| return -ENOMEM; |
| } |
| priv->rx_skbuff[i] = skb; |
| priv->rx_skbuff_dma[i] = dma_map_single(priv->device, skb->data, |
| priv->dma_buf_sz, |
| DMA_FROM_DEVICE); |
| if (dma_mapping_error(priv->device, priv->rx_skbuff_dma[i])) { |
| pr_err("%s: DMA mapping error\n", __func__); |
| dev_kfree_skb_any(skb); |
| return -EINVAL; |
| } |
| |
| p->des2 = priv->rx_skbuff_dma[i]; |
| |
| if ((priv->hw->mode->init_desc3) && |
| (priv->dma_buf_sz == BUF_SIZE_16KiB)) |
| priv->hw->mode->init_desc3(p); |
| |
| return 0; |
| } |
| |
| static void stmmac_free_rx_buffers(struct stmmac_priv *priv, int i) |
| { |
| if (priv->rx_skbuff[i]) { |
| dma_unmap_single(priv->device, priv->rx_skbuff_dma[i], |
| priv->dma_buf_sz, DMA_FROM_DEVICE); |
| dev_kfree_skb_any(priv->rx_skbuff[i]); |
| } |
| priv->rx_skbuff[i] = NULL; |
| } |
| |
| /** |
| * init_dma_desc_rings - init the RX/TX descriptor rings |
| * @dev: net device structure |
| * @flags: gfp flag. |
| * Description: this function initializes the DMA RX/TX descriptors |
| * and allocates the socket buffers. It suppors the chained and ring |
| * modes. |
| */ |
| static int init_dma_desc_rings(struct net_device *dev, gfp_t flags) |
| { |
| int i; |
| struct stmmac_priv *priv = netdev_priv(dev); |
| unsigned int bfsize = 0; |
| int ret = -ENOMEM; |
| |
| if (priv->hw->mode->set_16kib_bfsize) |
| bfsize = priv->hw->mode->set_16kib_bfsize(dev->mtu); |
| |
| if (bfsize < BUF_SIZE_16KiB) |
| bfsize = stmmac_set_bfsize(dev->mtu, priv->dma_buf_sz); |
| |
| priv->dma_buf_sz = bfsize; |
| |
| if (netif_msg_probe(priv)) { |
| pr_debug("(%s) dma_rx_phy=0x%08x dma_tx_phy=0x%08x\n", __func__, |
| (u32) priv->dma_rx_phy, (u32) priv->dma_tx_phy); |
| |
| /* RX INITIALIZATION */ |
| pr_debug("\tSKB addresses:\nskb\t\tskb data\tdma data\n"); |
| } |
| for (i = 0; i < DMA_RX_SIZE; i++) { |
| struct dma_desc *p; |
| if (priv->extend_desc) |
| p = &((priv->dma_erx + i)->basic); |
| else |
| p = priv->dma_rx + i; |
| |
| ret = stmmac_init_rx_buffers(priv, p, i, flags); |
| if (ret) |
| goto err_init_rx_buffers; |
| |
| if (netif_msg_probe(priv)) |
| pr_debug("[%p]\t[%p]\t[%x]\n", priv->rx_skbuff[i], |
| priv->rx_skbuff[i]->data, |
| (unsigned int)priv->rx_skbuff_dma[i]); |
| } |
| priv->cur_rx = 0; |
| priv->dirty_rx = (unsigned int)(i - DMA_RX_SIZE); |
| buf_sz = bfsize; |
| |
| /* Setup the chained descriptor addresses */ |
| if (priv->mode == STMMAC_CHAIN_MODE) { |
| if (priv->extend_desc) { |
| priv->hw->mode->init(priv->dma_erx, priv->dma_rx_phy, |
| DMA_RX_SIZE, 1); |
| priv->hw->mode->init(priv->dma_etx, priv->dma_tx_phy, |
| DMA_TX_SIZE, 1); |
| } else { |
| priv->hw->mode->init(priv->dma_rx, priv->dma_rx_phy, |
| DMA_RX_SIZE, 0); |
| priv->hw->mode->init(priv->dma_tx, priv->dma_tx_phy, |
| DMA_TX_SIZE, 0); |
| } |
| } |
| |
| /* TX INITIALIZATION */ |
| for (i = 0; i < DMA_TX_SIZE; i++) { |
| struct dma_desc *p; |
| if (priv->extend_desc) |
| p = &((priv->dma_etx + i)->basic); |
| else |
| p = priv->dma_tx + i; |
| p->des2 = 0; |
| priv->tx_skbuff_dma[i].buf = 0; |
| priv->tx_skbuff_dma[i].map_as_page = false; |
| priv->tx_skbuff_dma[i].len = 0; |
| priv->tx_skbuff_dma[i].last_segment = false; |
| priv->tx_skbuff[i] = NULL; |
| } |
| |
| priv->dirty_tx = 0; |
| priv->cur_tx = 0; |
| netdev_reset_queue(priv->dev); |
| |
| stmmac_clear_descriptors(priv); |
| |
| if (netif_msg_hw(priv)) |
| stmmac_display_rings(priv); |
| |
| return 0; |
| err_init_rx_buffers: |
| while (--i >= 0) |
| stmmac_free_rx_buffers(priv, i); |
| return ret; |
| } |
| |
| static void dma_free_rx_skbufs(struct stmmac_priv *priv) |
| { |
| int i; |
| |
| for (i = 0; i < DMA_RX_SIZE; i++) |
| stmmac_free_rx_buffers(priv, i); |
| } |
| |
| static void dma_free_tx_skbufs(struct stmmac_priv *priv) |
| { |
| int i; |
| |
| for (i = 0; i < DMA_TX_SIZE; i++) { |
| struct dma_desc *p; |
| |
| if (priv->extend_desc) |
| p = &((priv->dma_etx + i)->basic); |
| else |
| p = priv->dma_tx + i; |
| |
| if (priv->tx_skbuff_dma[i].buf) { |
| if (priv->tx_skbuff_dma[i].map_as_page) |
| dma_unmap_page(priv->device, |
| priv->tx_skbuff_dma[i].buf, |
| priv->tx_skbuff_dma[i].len, |
| DMA_TO_DEVICE); |
| else |
| dma_unmap_single(priv->device, |
| priv->tx_skbuff_dma[i].buf, |
| priv->tx_skbuff_dma[i].len, |
| DMA_TO_DEVICE); |
| } |
| |
| if (priv->tx_skbuff[i] != NULL) { |
| dev_kfree_skb_any(priv->tx_skbuff[i]); |
| priv->tx_skbuff[i] = NULL; |
| priv->tx_skbuff_dma[i].buf = 0; |
| priv->tx_skbuff_dma[i].map_as_page = false; |
| } |
| } |
| } |
| |
| /** |
| * alloc_dma_desc_resources - alloc TX/RX resources. |
| * @priv: private structure |
| * Description: according to which descriptor can be used (extend or basic) |
| * this function allocates the resources for TX and RX paths. In case of |
| * reception, for example, it pre-allocated the RX socket buffer in order to |
| * allow zero-copy mechanism. |
| */ |
| static int alloc_dma_desc_resources(struct stmmac_priv *priv) |
| { |
| int ret = -ENOMEM; |
| |
| priv->rx_skbuff_dma = kmalloc_array(DMA_RX_SIZE, sizeof(dma_addr_t), |
| GFP_KERNEL); |
| if (!priv->rx_skbuff_dma) |
| return -ENOMEM; |
| |
| priv->rx_skbuff = kmalloc_array(DMA_RX_SIZE, sizeof(struct sk_buff *), |
| GFP_KERNEL); |
| if (!priv->rx_skbuff) |
| goto err_rx_skbuff; |
| |
| priv->tx_skbuff_dma = kmalloc_array(DMA_TX_SIZE, |
| sizeof(*priv->tx_skbuff_dma), |
| GFP_KERNEL); |
| if (!priv->tx_skbuff_dma) |
| goto err_tx_skbuff_dma; |
| |
| priv->tx_skbuff = kmalloc_array(DMA_TX_SIZE, sizeof(struct sk_buff *), |
| GFP_KERNEL); |
| if (!priv->tx_skbuff) |
| goto err_tx_skbuff; |
| |
| if (priv->extend_desc) { |
| priv->dma_erx = dma_zalloc_coherent(priv->device, DMA_RX_SIZE * |
| sizeof(struct |
| dma_extended_desc), |
| &priv->dma_rx_phy, |
| GFP_KERNEL); |
| if (!priv->dma_erx) |
| goto err_dma; |
| |
| priv->dma_etx = dma_zalloc_coherent(priv->device, DMA_TX_SIZE * |
| sizeof(struct |
| dma_extended_desc), |
| &priv->dma_tx_phy, |
| GFP_KERNEL); |
| if (!priv->dma_etx) { |
| dma_free_coherent(priv->device, DMA_RX_SIZE * |
| sizeof(struct dma_extended_desc), |
| priv->dma_erx, priv->dma_rx_phy); |
| goto err_dma; |
| } |
| } else { |
| priv->dma_rx = dma_zalloc_coherent(priv->device, DMA_RX_SIZE * |
| sizeof(struct dma_desc), |
| &priv->dma_rx_phy, |
| GFP_KERNEL); |
| if (!priv->dma_rx) |
| goto err_dma; |
| |
| priv->dma_tx = dma_zalloc_coherent(priv->device, DMA_TX_SIZE * |
| sizeof(struct dma_desc), |
| &priv->dma_tx_phy, |
| GFP_KERNEL); |
| if (!priv->dma_tx) { |
| dma_free_coherent(priv->device, DMA_RX_SIZE * |
| sizeof(struct dma_desc), |
| priv->dma_rx, priv->dma_rx_phy); |
| goto err_dma; |
| } |
| } |
| |
| return 0; |
| |
| err_dma: |
| kfree(priv->tx_skbuff); |
| err_tx_skbuff: |
| kfree(priv->tx_skbuff_dma); |
| err_tx_skbuff_dma: |
| kfree(priv->rx_skbuff); |
| err_rx_skbuff: |
| kfree(priv->rx_skbuff_dma); |
| return ret; |
| } |
| |
| static void free_dma_desc_resources(struct stmmac_priv *priv) |
| { |
| /* Release the DMA TX/RX socket buffers */ |
| dma_free_rx_skbufs(priv); |
| dma_free_tx_skbufs(priv); |
| |
| /* Free DMA regions of consistent memory previously allocated */ |
| if (!priv->extend_desc) { |
| dma_free_coherent(priv->device, |
| DMA_TX_SIZE * sizeof(struct dma_desc), |
| priv->dma_tx, priv->dma_tx_phy); |
| dma_free_coherent(priv->device, |
| DMA_RX_SIZE * sizeof(struct dma_desc), |
| priv->dma_rx, priv->dma_rx_phy); |
| } else { |
| dma_free_coherent(priv->device, DMA_TX_SIZE * |
| sizeof(struct dma_extended_desc), |
| priv->dma_etx, priv->dma_tx_phy); |
| dma_free_coherent(priv->device, DMA_RX_SIZE * |
| sizeof(struct dma_extended_desc), |
| priv->dma_erx, priv->dma_rx_phy); |
| } |
| kfree(priv->rx_skbuff_dma); |
| kfree(priv->rx_skbuff); |
| kfree(priv->tx_skbuff_dma); |
| kfree(priv->tx_skbuff); |
| } |
| |
| /** |
| * stmmac_dma_operation_mode - HW DMA operation mode |
| * @priv: driver private structure |
| * Description: it is used for configuring the DMA operation mode register in |
| * order to program the tx/rx DMA thresholds or Store-And-Forward mode. |
| */ |
| static void stmmac_dma_operation_mode(struct stmmac_priv *priv) |
| { |
| int rxfifosz = priv->plat->rx_fifo_size; |
| |
| if (priv->plat->force_thresh_dma_mode) |
| priv->hw->dma->dma_mode(priv->ioaddr, tc, tc, rxfifosz); |
| else if (priv->plat->force_sf_dma_mode || priv->plat->tx_coe) { |
| /* |
| * In case of GMAC, SF mode can be enabled |
| * to perform the TX COE in HW. This depends on: |
| * 1) TX COE if actually supported |
| * 2) There is no bugged Jumbo frame support |
| * that needs to not insert csum in the TDES. |
| */ |
| priv->hw->dma->dma_mode(priv->ioaddr, SF_DMA_MODE, SF_DMA_MODE, |
| rxfifosz); |
| priv->xstats.threshold = SF_DMA_MODE; |
| } else |
| priv->hw->dma->dma_mode(priv->ioaddr, tc, SF_DMA_MODE, |
| rxfifosz); |
| } |
| |
| /** |
| * stmmac_tx_clean - to manage the transmission completion |
| * @priv: driver private structure |
| * Description: it reclaims the transmit resources after transmission completes. |
| */ |
| static void stmmac_tx_clean(struct stmmac_priv *priv) |
| { |
| unsigned int bytes_compl = 0, pkts_compl = 0; |
| unsigned int entry = priv->dirty_tx; |
| |
| spin_lock(&priv->tx_lock); |
| |
| priv->xstats.tx_clean++; |
| |
| while (entry != priv->cur_tx) { |
| struct sk_buff *skb = priv->tx_skbuff[entry]; |
| struct dma_desc *p; |
| int status; |
| |
| if (priv->extend_desc) |
| p = (struct dma_desc *)(priv->dma_etx + entry); |
| else |
| p = priv->dma_tx + entry; |
| |
| status = priv->hw->desc->tx_status(&priv->dev->stats, |
| &priv->xstats, p, |
| priv->ioaddr); |
| /* Check if the descriptor is owned by the DMA */ |
| if (unlikely(status & tx_dma_own)) |
| break; |
| |
| /* Just consider the last segment and ...*/ |
| if (likely(!(status & tx_not_ls))) { |
| /* ... verify the status error condition */ |
| if (unlikely(status & tx_err)) { |
| priv->dev->stats.tx_errors++; |
| } else { |
| priv->dev->stats.tx_packets++; |
| priv->xstats.tx_pkt_n++; |
| } |
| stmmac_get_tx_hwtstamp(priv, entry, skb); |
| } |
| |
| if (likely(priv->tx_skbuff_dma[entry].buf)) { |
| if (priv->tx_skbuff_dma[entry].map_as_page) |
| dma_unmap_page(priv->device, |
| priv->tx_skbuff_dma[entry].buf, |
| priv->tx_skbuff_dma[entry].len, |
| DMA_TO_DEVICE); |
| else |
| dma_unmap_single(priv->device, |
| priv->tx_skbuff_dma[entry].buf, |
| priv->tx_skbuff_dma[entry].len, |
| DMA_TO_DEVICE); |
| priv->tx_skbuff_dma[entry].buf = 0; |
| priv->tx_skbuff_dma[entry].map_as_page = false; |
| } |
| priv->hw->mode->clean_desc3(priv, p); |
| priv->tx_skbuff_dma[entry].last_segment = false; |
| priv->tx_skbuff_dma[entry].is_jumbo = false; |
| |
| if (likely(skb != NULL)) { |
| pkts_compl++; |
| bytes_compl += skb->len; |
| dev_consume_skb_any(skb); |
| priv->tx_skbuff[entry] = NULL; |
| } |
| |
| priv->hw->desc->release_tx_desc(p, priv->mode); |
| |
| entry = STMMAC_GET_ENTRY(entry, DMA_TX_SIZE); |
| } |
| priv->dirty_tx = entry; |
| |
| netdev_completed_queue(priv->dev, pkts_compl, bytes_compl); |
| |
| if (unlikely(netif_queue_stopped(priv->dev) && |
| stmmac_tx_avail(priv) > STMMAC_TX_THRESH)) { |
| netif_tx_lock(priv->dev); |
| if (netif_queue_stopped(priv->dev) && |
| stmmac_tx_avail(priv) > STMMAC_TX_THRESH) { |
| if (netif_msg_tx_done(priv)) |
| pr_debug("%s: restart transmit\n", __func__); |
| netif_wake_queue(priv->dev); |
| } |
| netif_tx_unlock(priv->dev); |
| } |
| |
| if ((priv->eee_enabled) && (!priv->tx_path_in_lpi_mode)) { |
| stmmac_enable_eee_mode(priv); |
| mod_timer(&priv->eee_ctrl_timer, STMMAC_LPI_T(eee_timer)); |
| } |
| spin_unlock(&priv->tx_lock); |
| } |
| |
| static inline void stmmac_enable_dma_irq(struct stmmac_priv *priv) |
| { |
| priv->hw->dma->enable_dma_irq(priv->ioaddr); |
| } |
| |
| static inline void stmmac_disable_dma_irq(struct stmmac_priv *priv) |
| { |
| priv->hw->dma->disable_dma_irq(priv->ioaddr); |
| } |
| |
| /** |
| * stmmac_tx_err - to manage the tx error |
| * @priv: driver private structure |
| * Description: it cleans the descriptors and restarts the transmission |
| * in case of transmission errors. |
| */ |
| static void stmmac_tx_err(struct stmmac_priv *priv) |
| { |
| int i; |
| netif_stop_queue(priv->dev); |
| |
| priv->hw->dma->stop_tx(priv->ioaddr); |
| dma_free_tx_skbufs(priv); |
| for (i = 0; i < DMA_TX_SIZE; i++) |
| if (priv->extend_desc) |
| priv->hw->desc->init_tx_desc(&priv->dma_etx[i].basic, |
| priv->mode, |
| (i == DMA_TX_SIZE - 1)); |
| else |
| priv->hw->desc->init_tx_desc(&priv->dma_tx[i], |
| priv->mode, |
| (i == DMA_TX_SIZE - 1)); |
| priv->dirty_tx = 0; |
| priv->cur_tx = 0; |
| netdev_reset_queue(priv->dev); |
| priv->hw->dma->start_tx(priv->ioaddr); |
| |
| priv->dev->stats.tx_errors++; |
| netif_wake_queue(priv->dev); |
| } |
| |
| /** |
| * stmmac_dma_interrupt - DMA ISR |
| * @priv: driver private structure |
| * Description: this is the DMA ISR. It is called by the main ISR. |
| * It calls the dwmac dma routine and schedule poll method in case of some |
| * work can be done. |
| */ |
| static void stmmac_dma_interrupt(struct stmmac_priv *priv) |
| { |
| int status; |
| int rxfifosz = priv->plat->rx_fifo_size; |
| |
| status = priv->hw->dma->dma_interrupt(priv->ioaddr, &priv->xstats); |
| if (likely((status & handle_rx)) || (status & handle_tx)) { |
| if (likely(napi_schedule_prep(&priv->napi))) { |
| stmmac_disable_dma_irq(priv); |
| __napi_schedule(&priv->napi); |
| } |
| } |
| if (unlikely(status & tx_hard_error_bump_tc)) { |
| /* Try to bump up the dma threshold on this failure */ |
| if (unlikely(priv->xstats.threshold != SF_DMA_MODE) && |
| (tc <= 256)) { |
| tc += 64; |
| if (priv->plat->force_thresh_dma_mode) |
| priv->hw->dma->dma_mode(priv->ioaddr, tc, tc, |
| rxfifosz); |
| else |
| priv->hw->dma->dma_mode(priv->ioaddr, tc, |
| SF_DMA_MODE, rxfifosz); |
| priv->xstats.threshold = tc; |
| } |
| } else if (unlikely(status == tx_hard_error)) |
| stmmac_tx_err(priv); |
| } |
| |
| /** |
| * stmmac_mmc_setup: setup the Mac Management Counters (MMC) |
| * @priv: driver private structure |
| * Description: this masks the MMC irq, in fact, the counters are managed in SW. |
| */ |
| static void stmmac_mmc_setup(struct stmmac_priv *priv) |
| { |
| unsigned int mode = MMC_CNTRL_RESET_ON_READ | MMC_CNTRL_COUNTER_RESET | |
| MMC_CNTRL_PRESET | MMC_CNTRL_FULL_HALF_PRESET; |
| |
| dwmac_mmc_intr_all_mask(priv->ioaddr); |
| |
| if (priv->dma_cap.rmon) { |
| dwmac_mmc_ctrl(priv->ioaddr, mode); |
| memset(&priv->mmc, 0, sizeof(struct stmmac_counters)); |
| } else |
| pr_info(" No MAC Management Counters available\n"); |
| } |
| |
| /** |
| * stmmac_get_synopsys_id - return the SYINID. |
| * @priv: driver private structure |
| * Description: this simple function is to decode and return the SYINID |
| * starting from the HW core register. |
| */ |
| static u32 stmmac_get_synopsys_id(struct stmmac_priv *priv) |
| { |
| u32 hwid = priv->hw->synopsys_uid; |
| |
| /* Check Synopsys Id (not available on old chips) */ |
| if (likely(hwid)) { |
| u32 uid = ((hwid & 0x0000ff00) >> 8); |
| u32 synid = (hwid & 0x000000ff); |
| |
| pr_info("stmmac - user ID: 0x%x, Synopsys ID: 0x%x\n", |
| uid, synid); |
| |
| return synid; |
| } |
| return 0; |
| } |
| |
| /** |
| * stmmac_selec_desc_mode - to select among: normal/alternate/extend descriptors |
| * @priv: driver private structure |
| * Description: select the Enhanced/Alternate or Normal descriptors. |
| * In case of Enhanced/Alternate, it checks if the extended descriptors are |
| * supported by the HW capability register. |
| */ |
| static void stmmac_selec_desc_mode(struct stmmac_priv *priv) |
| { |
| if (priv->plat->enh_desc) { |
| pr_info(" Enhanced/Alternate descriptors\n"); |
| |
| /* GMAC older than 3.50 has no extended descriptors */ |
| if (priv->synopsys_id >= DWMAC_CORE_3_50) { |
| pr_info("\tEnabled extended descriptors\n"); |
| priv->extend_desc = 1; |
| } else |
| pr_warn("Extended descriptors not supported\n"); |
| |
| priv->hw->desc = &enh_desc_ops; |
| } else { |
| pr_info(" Normal descriptors\n"); |
| priv->hw->desc = &ndesc_ops; |
| } |
| } |
| |
| /** |
| * stmmac_get_hw_features - get MAC capabilities from the HW cap. register. |
| * @priv: driver private structure |
| * Description: |
| * new GMAC chip generations have a new register to indicate the |
| * presence of the optional feature/functions. |
| * This can be also used to override the value passed through the |
| * platform and necessary for old MAC10/100 and GMAC chips. |
| */ |
| static int stmmac_get_hw_features(struct stmmac_priv *priv) |
| { |
| u32 hw_cap = 0; |
| |
| if (priv->hw->dma->get_hw_feature) { |
| hw_cap = priv->hw->dma->get_hw_feature(priv->ioaddr); |
| |
| priv->dma_cap.mbps_10_100 = (hw_cap & DMA_HW_FEAT_MIISEL); |
| priv->dma_cap.mbps_1000 = (hw_cap & DMA_HW_FEAT_GMIISEL) >> 1; |
| priv->dma_cap.half_duplex = (hw_cap & DMA_HW_FEAT_HDSEL) >> 2; |
| priv->dma_cap.hash_filter = (hw_cap & DMA_HW_FEAT_HASHSEL) >> 4; |
| priv->dma_cap.multi_addr = (hw_cap & DMA_HW_FEAT_ADDMAC) >> 5; |
| priv->dma_cap.pcs = (hw_cap & DMA_HW_FEAT_PCSSEL) >> 6; |
| priv->dma_cap.sma_mdio = (hw_cap & DMA_HW_FEAT_SMASEL) >> 8; |
| priv->dma_cap.pmt_remote_wake_up = |
| (hw_cap & DMA_HW_FEAT_RWKSEL) >> 9; |
| priv->dma_cap.pmt_magic_frame = |
| (hw_cap & DMA_HW_FEAT_MGKSEL) >> 10; |
| /* MMC */ |
| priv->dma_cap.rmon = (hw_cap & DMA_HW_FEAT_MMCSEL) >> 11; |
| /* IEEE 1588-2002 */ |
| priv->dma_cap.time_stamp = |
| (hw_cap & DMA_HW_FEAT_TSVER1SEL) >> 12; |
| /* IEEE 1588-2008 */ |
| priv->dma_cap.atime_stamp = |
| (hw_cap & DMA_HW_FEAT_TSVER2SEL) >> 13; |
| /* 802.3az - Energy-Efficient Ethernet (EEE) */ |
| priv->dma_cap.eee = (hw_cap & DMA_HW_FEAT_EEESEL) >> 14; |
| priv->dma_cap.av = (hw_cap & DMA_HW_FEAT_AVSEL) >> 15; |
| /* TX and RX csum */ |
| priv->dma_cap.tx_coe = (hw_cap & DMA_HW_FEAT_TXCOESEL) >> 16; |
| priv->dma_cap.rx_coe_type1 = |
| (hw_cap & DMA_HW_FEAT_RXTYP1COE) >> 17; |
| priv->dma_cap.rx_coe_type2 = |
| (hw_cap & DMA_HW_FEAT_RXTYP2COE) >> 18; |
| priv->dma_cap.rxfifo_over_2048 = |
| (hw_cap & DMA_HW_FEAT_RXFIFOSIZE) >> 19; |
| /* TX and RX number of channels */ |
| priv->dma_cap.number_rx_channel = |
| (hw_cap & DMA_HW_FEAT_RXCHCNT) >> 20; |
| priv->dma_cap.number_tx_channel = |
| (hw_cap & DMA_HW_FEAT_TXCHCNT) >> 22; |
| /* Alternate (enhanced) DESC mode */ |
| priv->dma_cap.enh_desc = (hw_cap & DMA_HW_FEAT_ENHDESSEL) >> 24; |
| } |
| |
| return hw_cap; |
| } |
| |
| /** |
| * stmmac_check_ether_addr - check if the MAC addr is valid |
| * @priv: driver private structure |
| * Description: |
| * it is to verify if the MAC address is valid, in case of failures it |
| * generates a random MAC address |
| */ |
| static void stmmac_check_ether_addr(struct stmmac_priv *priv) |
| { |
| if (!is_valid_ether_addr(priv->dev->dev_addr)) { |
| priv->hw->mac->get_umac_addr(priv->hw, |
| priv->dev->dev_addr, 0); |
| if (!is_valid_ether_addr(priv->dev->dev_addr)) |
| eth_hw_addr_random(priv->dev); |
| pr_info("%s: device MAC address %pM\n", priv->dev->name, |
| priv->dev->dev_addr); |
| } |
| } |
| |
| /** |
| * stmmac_init_dma_engine - DMA init. |
| * @priv: driver private structure |
| * Description: |
| * It inits the DMA invoking the specific MAC/GMAC callback. |
| * Some DMA parameters can be passed from the platform; |
| * in case of these are not passed a default is kept for the MAC or GMAC. |
| */ |
| static int stmmac_init_dma_engine(struct stmmac_priv *priv) |
| { |
| int pbl = DEFAULT_DMA_PBL, fixed_burst = 0, aal = 0; |
| int mixed_burst = 0; |
| int atds = 0; |
| int ret = 0; |
| |
| if (priv->plat->dma_cfg) { |
| pbl = priv->plat->dma_cfg->pbl; |
| fixed_burst = priv->plat->dma_cfg->fixed_burst; |
| mixed_burst = priv->plat->dma_cfg->mixed_burst; |
| aal = priv->plat->dma_cfg->aal; |
| } |
| |
| if (priv->extend_desc && (priv->mode == STMMAC_RING_MODE)) |
| atds = 1; |
| |
| ret = priv->hw->dma->reset(priv->ioaddr); |
| if (ret) { |
| dev_err(priv->device, "Failed to reset the dma\n"); |
| return ret; |
| } |
| |
| priv->hw->dma->init(priv->ioaddr, pbl, fixed_burst, mixed_burst, |
| aal, priv->dma_tx_phy, priv->dma_rx_phy, atds); |
| |
| if ((priv->synopsys_id >= DWMAC_CORE_3_50) && |
| (priv->plat->axi && priv->hw->dma->axi)) |
| priv->hw->dma->axi(priv->ioaddr, priv->plat->axi); |
| |
| return ret; |
| } |
| |
| /** |
| * stmmac_tx_timer - mitigation sw timer for tx. |
| * @data: data pointer |
| * Description: |
| * This is the timer handler to directly invoke the stmmac_tx_clean. |
| */ |
| static void stmmac_tx_timer(unsigned long data) |
| { |
| struct stmmac_priv *priv = (struct stmmac_priv *)data; |
| |
| stmmac_tx_clean(priv); |
| } |
| |
| /** |
| * stmmac_init_tx_coalesce - init tx mitigation options. |
| * @priv: driver private structure |
| * Description: |
| * This inits the transmit coalesce parameters: i.e. timer rate, |
| * timer handler and default threshold used for enabling the |
| * interrupt on completion bit. |
| */ |
| static void stmmac_init_tx_coalesce(struct stmmac_priv *priv) |
| { |
| priv->tx_coal_frames = STMMAC_TX_FRAMES; |
| priv->tx_coal_timer = STMMAC_COAL_TX_TIMER; |
| init_timer(&priv->txtimer); |
| priv->txtimer.expires = STMMAC_COAL_TIMER(priv->tx_coal_timer); |
| priv->txtimer.data = (unsigned long)priv; |
| priv->txtimer.function = stmmac_tx_timer; |
| add_timer(&priv->txtimer); |
| } |
| |
| /** |
| * stmmac_hw_setup - setup mac in a usable state. |
| * @dev : pointer to the device structure. |
| * Description: |
| * this is the main function to setup the HW in a usable state because the |
| * dma engine is reset, the core registers are configured (e.g. AXI, |
| * Checksum features, timers). The DMA is ready to start receiving and |
| * transmitting. |
| * Return value: |
| * 0 on success and an appropriate (-)ve integer as defined in errno.h |
| * file on failure. |
| */ |
| static int stmmac_hw_setup(struct net_device *dev, bool init_ptp) |
| { |
| struct stmmac_priv *priv = netdev_priv(dev); |
| int ret; |
| |
| /* DMA initialization and SW reset */ |
| ret = stmmac_init_dma_engine(priv); |
| if (ret < 0) { |
| pr_err("%s: DMA engine initialization failed\n", __func__); |
| return ret; |
| } |
| |
| /* Copy the MAC addr into the HW */ |
| priv->hw->mac->set_umac_addr(priv->hw, dev->dev_addr, 0); |
| |
| /* If required, perform hw setup of the bus. */ |
| if (priv->plat->bus_setup) |
| priv->plat->bus_setup(priv->ioaddr); |
| |
| /* Initialize the MAC Core */ |
| priv->hw->mac->core_init(priv->hw, dev->mtu); |
| |
| ret = priv->hw->mac->rx_ipc(priv->hw); |
| if (!ret) { |
| pr_warn(" RX IPC Checksum Offload disabled\n"); |
| priv->plat->rx_coe = STMMAC_RX_COE_NONE; |
| priv->hw->rx_csum = 0; |
| } |
| |
| /* Enable the MAC Rx/Tx */ |
| stmmac_set_mac(priv->ioaddr, true); |
| |
| /* Set the HW DMA mode and the COE */ |
| stmmac_dma_operation_mode(priv); |
| |
| stmmac_mmc_setup(priv); |
| |
| if (init_ptp) { |
| ret = stmmac_init_ptp(priv); |
| if (ret && ret != -EOPNOTSUPP) |
| pr_warn("%s: failed PTP initialisation\n", __func__); |
| } |
| |
| #ifdef CONFIG_DEBUG_FS |
| ret = stmmac_init_fs(dev); |
| if (ret < 0) |
| pr_warn("%s: failed debugFS registration\n", __func__); |
| #endif |
| /* Start the ball rolling... */ |
| pr_debug("%s: DMA RX/TX processes started...\n", dev->name); |
| priv->hw->dma->start_tx(priv->ioaddr); |
| priv->hw->dma->start_rx(priv->ioaddr); |
| |
| /* Dump DMA/MAC registers */ |
| if (netif_msg_hw(priv)) { |
| priv->hw->mac->dump_regs(priv->hw); |
| priv->hw->dma->dump_regs(priv->ioaddr); |
| } |
| priv->tx_lpi_timer = STMMAC_DEFAULT_TWT_LS; |
| |
| if ((priv->use_riwt) && (priv->hw->dma->rx_watchdog)) { |
| priv->rx_riwt = MAX_DMA_RIWT; |
| priv->hw->dma->rx_watchdog(priv->ioaddr, MAX_DMA_RIWT); |
| } |
| |
| if (priv->pcs && priv->hw->mac->ctrl_ane) |
| priv->hw->mac->ctrl_ane(priv->hw, 0); |
| |
| return 0; |
| } |
| |
| /** |
| * stmmac_open - open entry point of the driver |
| * @dev : pointer to the device structure. |
| * Description: |
| * This function is the open entry point of the driver. |
| * Return value: |
| * 0 on success and an appropriate (-)ve integer as defined in errno.h |
| * file on failure. |
| */ |
| static int stmmac_open(struct net_device *dev) |
| { |
| struct stmmac_priv *priv = netdev_priv(dev); |
| int ret; |
| |
| stmmac_check_ether_addr(priv); |
| |
| if (priv->pcs != STMMAC_PCS_RGMII && priv->pcs != STMMAC_PCS_TBI && |
| priv->pcs != STMMAC_PCS_RTBI) { |
| ret = stmmac_init_phy(dev); |
| if (ret) { |
| pr_err("%s: Cannot attach to PHY (error: %d)\n", |
| __func__, ret); |
| return ret; |
| } |
| } |
| |
| /* Extra statistics */ |
| memset(&priv->xstats, 0, sizeof(struct stmmac_extra_stats)); |
| priv->xstats.threshold = tc; |
| |
| priv->dma_buf_sz = STMMAC_ALIGN(buf_sz); |
| priv->rx_copybreak = STMMAC_RX_COPYBREAK; |
| |
| ret = alloc_dma_desc_resources(priv); |
| if (ret < 0) { |
| pr_err("%s: DMA descriptors allocation failed\n", __func__); |
| goto dma_desc_error; |
| } |
| |
| ret = init_dma_desc_rings(dev, GFP_KERNEL); |
| if (ret < 0) { |
| pr_err("%s: DMA descriptors initialization failed\n", __func__); |
| goto init_error; |
| } |
| |
| ret = stmmac_hw_setup(dev, true); |
| if (ret < 0) { |
| pr_err("%s: Hw setup failed\n", __func__); |
| goto init_error; |
| } |
| |
| stmmac_init_tx_coalesce(priv); |
| |
| if (priv->phydev) |
| phy_start(priv->phydev); |
| |
| /* Request the IRQ lines */ |
| ret = request_irq(dev->irq, stmmac_interrupt, |
| IRQF_SHARED, dev->name, dev); |
| if (unlikely(ret < 0)) { |
| pr_err("%s: ERROR: allocating the IRQ %d (error: %d)\n", |
| __func__, dev->irq, ret); |
| goto init_error; |
| } |
| |
| /* Request the Wake IRQ in case of another line is used for WoL */ |
| if (priv->wol_irq != dev->irq) { |
| ret = request_irq(priv->wol_irq, stmmac_interrupt, |
| IRQF_SHARED, dev->name, dev); |
| if (unlikely(ret < 0)) { |
| pr_err("%s: ERROR: allocating the WoL IRQ %d (%d)\n", |
| __func__, priv->wol_irq, ret); |
| goto wolirq_error; |
| } |
| } |
| |
| /* Request the IRQ lines */ |
| if (priv->lpi_irq > 0) { |
| ret = request_irq(priv->lpi_irq, stmmac_interrupt, IRQF_SHARED, |
| dev->name, dev); |
| if (unlikely(ret < 0)) { |
| pr_err("%s: ERROR: allocating the LPI IRQ %d (%d)\n", |
| __func__, priv->lpi_irq, ret); |
| goto lpiirq_error; |
| } |
| } |
| |
| napi_enable(&priv->napi); |
| netif_start_queue(dev); |
| |
| return 0; |
| |
| lpiirq_error: |
| if (priv->wol_irq != dev->irq) |
| free_irq(priv->wol_irq, dev); |
| wolirq_error: |
| free_irq(dev->irq, dev); |
| |
| init_error: |
| free_dma_desc_resources(priv); |
| dma_desc_error: |
| if (priv->phydev) |
| phy_disconnect(priv->phydev); |
| |
| return ret; |
| } |
| |
| /** |
| * stmmac_release - close entry point of the driver |
| * @dev : device pointer. |
| * Description: |
| * This is the stop entry point of the driver. |
| */ |
| static int stmmac_release(struct net_device *dev) |
| { |
| struct stmmac_priv *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); |
| phy_disconnect(priv->phydev); |
| priv->phydev = NULL; |
| } |
| |
| netif_stop_queue(dev); |
| |
| napi_disable(&priv->napi); |
| |
| del_timer_sync(&priv->txtimer); |
| |
| /* Free the IRQ lines */ |
| free_irq(dev->irq, dev); |
| if (priv->wol_irq != dev->irq) |
| free_irq(priv->wol_irq, dev); |
| if (priv->lpi_irq > 0) |
| free_irq(priv->lpi_irq, dev); |
| |
| /* Stop TX/RX DMA and clear the descriptors */ |
| priv->hw->dma->stop_tx(priv->ioaddr); |
| priv->hw->dma->stop_rx(priv->ioaddr); |
| |
| /* Release and free the Rx/Tx resources */ |
| free_dma_desc_resources(priv); |
| |
| /* Disable the MAC Rx/Tx */ |
| stmmac_set_mac(priv->ioaddr, false); |
| |
| netif_carrier_off(dev); |
| |
| #ifdef CONFIG_DEBUG_FS |
| stmmac_exit_fs(dev); |
| #endif |
| |
| stmmac_release_ptp(priv); |
| |
| return 0; |
| } |
| |
| /** |
| * stmmac_xmit - Tx entry point of the driver |
| * @skb : the socket buffer |
| * @dev : device pointer |
| * Description : this is the tx entry point of the driver. |
| * It programs the chain or the ring and supports oversized frames |
| * and SG feature. |
| */ |
| static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev) |
| { |
| struct stmmac_priv *priv = netdev_priv(dev); |
| unsigned int nopaged_len = skb_headlen(skb); |
| int i, csum_insertion = 0, is_jumbo = 0; |
| int nfrags = skb_shinfo(skb)->nr_frags; |
| unsigned int entry, first_entry; |
| struct dma_desc *desc, *first; |
| unsigned int enh_desc; |
| |
| spin_lock(&priv->tx_lock); |
| |
| if (unlikely(stmmac_tx_avail(priv) < nfrags + 1)) { |
| spin_unlock(&priv->tx_lock); |
| if (!netif_queue_stopped(dev)) { |
| netif_stop_queue(dev); |
| /* This is a hard error, log it. */ |
| pr_err("%s: Tx Ring full when queue awake\n", __func__); |
| } |
| return NETDEV_TX_BUSY; |
| } |
| |
| if (priv->tx_path_in_lpi_mode) |
| stmmac_disable_eee_mode(priv); |
| |
| entry = priv->cur_tx; |
| first_entry = entry; |
| |
| csum_insertion = (skb->ip_summed == CHECKSUM_PARTIAL); |
| |
| if (likely(priv->extend_desc)) |
| desc = (struct dma_desc *)(priv->dma_etx + entry); |
| else |
| desc = priv->dma_tx + entry; |
| |
| first = desc; |
| |
| priv->tx_skbuff[first_entry] = skb; |
| |
| enh_desc = priv->plat->enh_desc; |
| /* To program the descriptors according to the size of the frame */ |
| if (enh_desc) |
| is_jumbo = priv->hw->mode->is_jumbo_frm(skb->len, enh_desc); |
| |
| if (unlikely(is_jumbo)) { |
| entry = priv->hw->mode->jumbo_frm(priv, skb, csum_insertion); |
| if (unlikely(entry < 0)) |
| goto dma_map_err; |
| } |
| |
| for (i = 0; i < nfrags; i++) { |
| const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
| int len = skb_frag_size(frag); |
| bool last_segment = (i == (nfrags - 1)); |
| |
| entry = STMMAC_GET_ENTRY(entry, DMA_TX_SIZE); |
| |
| if (likely(priv->extend_desc)) |
| desc = (struct dma_desc *)(priv->dma_etx + entry); |
| else |
| desc = priv->dma_tx + entry; |
| |
| desc->des2 = skb_frag_dma_map(priv->device, frag, 0, len, |
| DMA_TO_DEVICE); |
| if (dma_mapping_error(priv->device, desc->des2)) |
| goto dma_map_err; /* should reuse desc w/o issues */ |
| |
| priv->tx_skbuff[entry] = NULL; |
| priv->tx_skbuff_dma[entry].buf = desc->des2; |
| priv->tx_skbuff_dma[entry].map_as_page = true; |
| priv->tx_skbuff_dma[entry].len = len; |
| priv->tx_skbuff_dma[entry].last_segment = last_segment; |
| |
| /* Prepare the descriptor and set the own bit too */ |
| priv->hw->desc->prepare_tx_desc(desc, 0, len, csum_insertion, |
| priv->mode, 1, last_segment); |
| } |
| |
| entry = STMMAC_GET_ENTRY(entry, DMA_TX_SIZE); |
| |
| priv->cur_tx = entry; |
| |
| if (netif_msg_pktdata(priv)) { |
| pr_debug("%s: curr=%d dirty=%d f=%d, e=%d, first=%p, nfrags=%d", |
| __func__, priv->cur_tx, priv->dirty_tx, first_entry, |
| entry, first, nfrags); |
| |
| if (priv->extend_desc) |
| stmmac_display_ring((void *)priv->dma_etx, |
| DMA_TX_SIZE, 1); |
| else |
| stmmac_display_ring((void *)priv->dma_tx, |
| DMA_TX_SIZE, 0); |
| |
| pr_debug(">>> frame to be transmitted: "); |
| print_pkt(skb->data, skb->len); |
| } |
| |
| if (unlikely(stmmac_tx_avail(priv) <= (MAX_SKB_FRAGS + 1))) { |
| if (netif_msg_hw(priv)) |
| pr_debug("%s: stop transmitted packets\n", __func__); |
| netif_stop_queue(dev); |
| } |
| |
| dev->stats.tx_bytes += skb->len; |
| |
| /* According to the coalesce parameter the IC bit for the latest |
| * segment is reset and the timer re-started to clean the tx status. |
| * This approach takes care about the fragments: desc is the first |
| * element in case of no SG. |
| */ |
| priv->tx_count_frames += nfrags + 1; |
| if (likely(priv->tx_coal_frames > priv->tx_count_frames)) { |
| mod_timer(&priv->txtimer, |
| STMMAC_COAL_TIMER(priv->tx_coal_timer)); |
| } else { |
| priv->tx_count_frames = 0; |
| priv->hw->desc->set_tx_ic(desc); |
| priv->xstats.tx_set_ic_bit++; |
| } |
| |
| if (!priv->hwts_tx_en) |
| skb_tx_timestamp(skb); |
| |
| /* Ready to fill the first descriptor and set the OWN bit w/o any |
| * problems because all the descriptors are actually ready to be |
| * passed to the DMA engine. |
| */ |
| if (likely(!is_jumbo)) { |
| bool last_segment = (nfrags == 0); |
| |
| first->des2 = dma_map_single(priv->device, skb->data, |
| nopaged_len, DMA_TO_DEVICE); |
| if (dma_mapping_error(priv->device, first->des2)) |
| goto dma_map_err; |
| |
| priv->tx_skbuff_dma[first_entry].buf = first->des2; |
| priv->tx_skbuff_dma[first_entry].len = nopaged_len; |
| priv->tx_skbuff_dma[first_entry].last_segment = last_segment; |
| |
| if (unlikely((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) && |
| priv->hwts_tx_en)) { |
| /* declare that device is doing timestamping */ |
| skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; |
| priv->hw->desc->enable_tx_timestamp(first); |
| } |
| |
| /* Prepare the first descriptor setting the OWN bit too */ |
| priv->hw->desc->prepare_tx_desc(first, 1, nopaged_len, |
| csum_insertion, priv->mode, 1, |
| last_segment); |
| |
| /* The own bit must be the latest setting done when prepare the |
| * descriptor and then barrier is needed to make sure that |
| * all is coherent before granting the DMA engine. |
| */ |
| smp_wmb(); |
| } |
| |
| netdev_sent_queue(dev, skb->len); |
| priv->hw->dma->enable_dma_transmission(priv->ioaddr); |
| |
| spin_unlock(&priv->tx_lock); |
| return NETDEV_TX_OK; |
| |
| dma_map_err: |
| spin_unlock(&priv->tx_lock); |
| dev_err(priv->device, "Tx dma map failed\n"); |
| dev_kfree_skb(skb); |
| priv->dev->stats.tx_dropped++; |
| return NETDEV_TX_OK; |
| } |
| |
| static void stmmac_rx_vlan(struct net_device *dev, struct sk_buff *skb) |
| { |
| struct ethhdr *ehdr; |
| u16 vlanid; |
| |
| if ((dev->features & NETIF_F_HW_VLAN_CTAG_RX) == |
| NETIF_F_HW_VLAN_CTAG_RX && |
| !__vlan_get_tag(skb, &vlanid)) { |
| /* pop the vlan tag */ |
| ehdr = (struct ethhdr *)skb->data; |
| memmove(skb->data + VLAN_HLEN, ehdr, ETH_ALEN * 2); |
| skb_pull(skb, VLAN_HLEN); |
| __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlanid); |
| } |
| } |
| |
| |
| static inline int stmmac_rx_threshold_count(struct stmmac_priv *priv) |
| { |
| if (priv->rx_zeroc_thresh < STMMAC_RX_THRESH) |
| return 0; |
| |
| return 1; |
| } |
| |
| /** |
| * stmmac_rx_refill - refill used skb preallocated buffers |
| * @priv: driver private structure |
| * Description : this is to reallocate the skb for the reception process |
| * that is based on zero-copy. |
| */ |
| static inline void stmmac_rx_refill(struct stmmac_priv *priv) |
| { |
| int bfsize = priv->dma_buf_sz; |
| unsigned int entry = priv->dirty_rx; |
| int dirty = stmmac_rx_dirty(priv); |
| |
| while (dirty-- > 0) { |
| struct dma_desc *p; |
| |
| if (priv->extend_desc) |
| p = (struct dma_desc *)(priv->dma_erx + entry); |
| else |
| p = priv->dma_rx + entry; |
| |
| if (likely(priv->rx_skbuff[entry] == NULL)) { |
| struct sk_buff *skb; |
| |
| skb = netdev_alloc_skb_ip_align(priv->dev, bfsize); |
| if (unlikely(!skb)) { |
| /* so for a while no zero-copy! */ |
| priv->rx_zeroc_thresh = STMMAC_RX_THRESH; |
| if (unlikely(net_ratelimit())) |
| dev_err(priv->device, |
| "fail to alloc skb entry %d\n", |
| entry); |
| break; |
| } |
| |
| priv->rx_skbuff[entry] = skb; |
| priv->rx_skbuff_dma[entry] = |
| dma_map_single(priv->device, skb->data, bfsize, |
| DMA_FROM_DEVICE); |
| if (dma_mapping_error(priv->device, |
| priv->rx_skbuff_dma[entry])) { |
| dev_err(priv->device, "Rx dma map failed\n"); |
| dev_kfree_skb(skb); |
| break; |
| } |
| p->des2 = priv->rx_skbuff_dma[entry]; |
| |
| priv->hw->mode->refill_desc3(priv, p); |
| |
| if (priv->rx_zeroc_thresh > 0) |
| priv->rx_zeroc_thresh--; |
| |
| if (netif_msg_rx_status(priv)) |
| pr_debug("\trefill entry #%d\n", entry); |
| } |
| |
| wmb(); |
| priv->hw->desc->set_rx_owner(p); |
| wmb(); |
| |
| entry = STMMAC_GET_ENTRY(entry, DMA_RX_SIZE); |
| } |
| priv->dirty_rx = entry; |
| } |
| |
| /** |
| * stmmac_rx - manage the receive process |
| * @priv: driver private structure |
| * @limit: napi bugget. |
| * Description : this the function called by the napi poll method. |
| * It gets all the frames inside the ring. |
| */ |
| static int stmmac_rx(struct stmmac_priv *priv, int limit) |
| { |
| unsigned int entry = priv->cur_rx; |
| unsigned int next_entry; |
| unsigned int count = 0; |
| int coe = priv->hw->rx_csum; |
| |
| if (netif_msg_rx_status(priv)) { |
| pr_debug("%s: descriptor ring:\n", __func__); |
| if (priv->extend_desc) |
| stmmac_display_ring((void *)priv->dma_erx, |
| DMA_RX_SIZE, 1); |
| else |
| stmmac_display_ring((void *)priv->dma_rx, |
| DMA_RX_SIZE, 0); |
| } |
| while (count < limit) { |
| int status; |
| struct dma_desc *p; |
| |
| if (priv->extend_desc) |
| p = (struct dma_desc *)(priv->dma_erx + entry); |
| else |
| p = priv->dma_rx + entry; |
| |
| /* read the status of the incoming frame */ |
| status = priv->hw->desc->rx_status(&priv->dev->stats, |
| &priv->xstats, p); |
| /* check if managed by the DMA otherwise go ahead */ |
| if (unlikely(status & dma_own)) |
| break; |
| |
| count++; |
| |
| priv->cur_rx = STMMAC_GET_ENTRY(priv->cur_rx, DMA_RX_SIZE); |
| next_entry = priv->cur_rx; |
| |
| if (priv->extend_desc) |
| prefetch(priv->dma_erx + next_entry); |
| else |
| prefetch(priv->dma_rx + next_entry); |
| |
| if ((priv->extend_desc) && (priv->hw->desc->rx_extended_status)) |
| priv->hw->desc->rx_extended_status(&priv->dev->stats, |
| &priv->xstats, |
| priv->dma_erx + |
| entry); |
| if (unlikely(status == discard_frame)) { |
| priv->dev->stats.rx_errors++; |
| if (priv->hwts_rx_en && !priv->extend_desc) { |
| /* DESC2 & DESC3 will be overwitten by device |
| * with timestamp value, hence reinitialize |
| * them in stmmac_rx_refill() function so that |
| * device can reuse it. |
| */ |
| priv->rx_skbuff[entry] = NULL; |
| dma_unmap_single(priv->device, |
| priv->rx_skbuff_dma[entry], |
| priv->dma_buf_sz, |
| DMA_FROM_DEVICE); |
| } |
| } else { |
| struct sk_buff *skb; |
| int frame_len; |
| |
| frame_len = priv->hw->desc->get_rx_frame_len(p, coe); |
| |
| /* check if frame_len fits the preallocated memory */ |
| if (frame_len > priv->dma_buf_sz) { |
| priv->dev->stats.rx_length_errors++; |
| break; |
| } |
| |
| /* ACS is set; GMAC core strips PAD/FCS for IEEE 802.3 |
| * Type frames (LLC/LLC-SNAP) |
| */ |
| if (unlikely(status != llc_snap)) |
| frame_len -= ETH_FCS_LEN; |
| |
| if (netif_msg_rx_status(priv)) { |
| pr_debug("\tdesc: %p [entry %d] buff=0x%x\n", |
| p, entry, p->des2); |
| if (frame_len > ETH_FRAME_LEN) |
| pr_debug("\tframe size %d, COE: %d\n", |
| frame_len, status); |
| } |
| |
| if (unlikely((frame_len < priv->rx_copybreak) || |
| stmmac_rx_threshold_count(priv))) { |
| skb = netdev_alloc_skb_ip_align(priv->dev, |
| frame_len); |
| if (unlikely(!skb)) { |
| if (net_ratelimit()) |
| dev_warn(priv->device, |
| "packet dropped\n"); |
| priv->dev->stats.rx_dropped++; |
| break; |
| } |
| |
| dma_sync_single_for_cpu(priv->device, |
| priv->rx_skbuff_dma |
| [entry], frame_len, |
| DMA_FROM_DEVICE); |
| skb_copy_to_linear_data(skb, |
| priv-> |
| rx_skbuff[entry]->data, |
| frame_len); |
| |
| skb_put(skb, frame_len); |
| dma_sync_single_for_device(priv->device, |
| priv->rx_skbuff_dma |
| [entry], frame_len, |
| DMA_FROM_DEVICE); |
| } else { |
| skb = priv->rx_skbuff[entry]; |
| if (unlikely(!skb)) { |
| pr_err("%s: Inconsistent Rx chain\n", |
| priv->dev->name); |
| priv->dev->stats.rx_dropped++; |
| break; |
| } |
| prefetch(skb->data - NET_IP_ALIGN); |
| priv->rx_skbuff[entry] = NULL; |
| priv->rx_zeroc_thresh++; |
| |
| skb_put(skb, frame_len); |
| dma_unmap_single(priv->device, |
| priv->rx_skbuff_dma[entry], |
| priv->dma_buf_sz, |
| DMA_FROM_DEVICE); |
| } |
| |
| stmmac_get_rx_hwtstamp(priv, entry, skb); |
| |
| if (netif_msg_pktdata(priv)) { |
| pr_debug("frame received (%dbytes)", frame_len); |
| print_pkt(skb->data, frame_len); |
| } |
| |
| stmmac_rx_vlan(priv->dev, skb); |
| |
| skb->protocol = eth_type_trans(skb, priv->dev); |
| |
| if (unlikely(!coe)) |
| skb_checksum_none_assert(skb); |
| else |
| skb->ip_summed = CHECKSUM_UNNECESSARY; |
| |
| napi_gro_receive(&priv->napi, skb); |
| |
| priv->dev->stats.rx_packets++; |
| priv->dev->stats.rx_bytes += frame_len; |
| } |
| entry = next_entry; |
| } |
| |
| stmmac_rx_refill(priv); |
| |
| priv->xstats.rx_pkt_n += count; |
| |
| return count; |
| } |
| |
| /** |
| * stmmac_poll - stmmac poll method (NAPI) |
| * @napi : pointer to the napi structure. |
| * @budget : maximum number of packets that the current CPU can receive from |
| * all interfaces. |
| * Description : |
| * To look at the incoming frames and clear the tx resources. |
| */ |
| static int stmmac_poll(struct napi_struct *napi, int budget) |
| { |
| struct stmmac_priv *priv = container_of(napi, struct stmmac_priv, napi); |
| int work_done = 0; |
| |
| priv->xstats.napi_poll++; |
| stmmac_tx_clean(priv); |
| |
| work_done = stmmac_rx(priv, budget); |
| if (work_done < budget) { |
| napi_complete(napi); |
| stmmac_enable_dma_irq(priv); |
| } |
| return work_done; |
| } |
| |
| /** |
| * stmmac_tx_timeout |
| * @dev : Pointer to net device structure |
| * Description: this function is called when a packet transmission fails to |
| * complete within a reasonable time. The driver will mark the error in the |
| * netdev structure and arrange for the device to be reset to a sane state |
| * in order to transmit a new packet. |
| */ |
| static void stmmac_tx_timeout(struct net_device *dev) |
| { |
| struct stmmac_priv *priv = netdev_priv(dev); |
| |
| /* Clear Tx resources and restart transmitting again */ |
| stmmac_tx_err(priv); |
| } |
| |
| /** |
| * stmmac_set_rx_mode - entry point for multicast addressing |
| * @dev : pointer to the device structure |
| * Description: |
| * This function is a driver entry point which gets called by the kernel |
| * whenever multicast addresses must be enabled/disabled. |
| * Return value: |
| * void. |
| */ |
| static void stmmac_set_rx_mode(struct net_device *dev) |
| { |
| struct stmmac_priv *priv = netdev_priv(dev); |
| |
| priv->hw->mac->set_filter(priv->hw, dev); |
| } |
| |
| /** |
| * stmmac_change_mtu - entry point to change MTU size for the device. |
| * @dev : device pointer. |
| * @new_mtu : the new MTU size for the device. |
| * Description: the Maximum Transfer Unit (MTU) is used by the network layer |
| * to drive packet transmission. Ethernet has an MTU of 1500 octets |
| * (ETH_DATA_LEN). This value can be changed with ifconfig. |
| * Return value: |
| * 0 on success and an appropriate (-)ve integer as defined in errno.h |
| * file on failure. |
| */ |
| static int stmmac_change_mtu(struct net_device *dev, int new_mtu) |
| { |
| struct stmmac_priv *priv = netdev_priv(dev); |
| int max_mtu; |
| |
| if (netif_running(dev)) { |
| pr_err("%s: must be stopped to change its MTU\n", dev->name); |
| return -EBUSY; |
| } |
| |
| if (priv->plat->enh_desc) |
| max_mtu = JUMBO_LEN; |
| else |
| max_mtu = SKB_MAX_HEAD(NET_SKB_PAD + NET_IP_ALIGN); |
| |
| if (priv->plat->maxmtu < max_mtu) |
| max_mtu = priv->plat->maxmtu; |
| |
| if ((new_mtu < 46) || (new_mtu > max_mtu)) { |
| pr_err("%s: invalid MTU, max MTU is: %d\n", dev->name, max_mtu); |
| return -EINVAL; |
| } |
| |
| dev->mtu = new_mtu; |
| netdev_update_features(dev); |
| |
| return 0; |
| } |
| |
| static netdev_features_t stmmac_fix_features(struct net_device *dev, |
| netdev_features_t features) |
| { |
| struct stmmac_priv *priv = netdev_priv(dev); |
| |
| if (priv->plat->rx_coe == STMMAC_RX_COE_NONE) |
| features &= ~NETIF_F_RXCSUM; |
| |
| if (!priv->plat->tx_coe) |
| features &= ~NETIF_F_CSUM_MASK; |
| |
| /* Some GMAC devices have a bugged Jumbo frame support that |
| * needs to have the Tx COE disabled for oversized frames |
| * (due to limited buffer sizes). In this case we disable |
| * the TX csum insertionin the TDES and not use SF. |
| */ |
| if (priv->plat->bugged_jumbo && (dev->mtu > ETH_DATA_LEN)) |
| features &= ~NETIF_F_CSUM_MASK; |
| |
| return features; |
| } |
| |
| static int stmmac_set_features(struct net_device *netdev, |
| netdev_features_t features) |
| { |
| struct stmmac_priv *priv = netdev_priv(netdev); |
| |
| /* Keep the COE Type in case of csum is supporting */ |
| if (features & NETIF_F_RXCSUM) |
| priv->hw->rx_csum = priv->plat->rx_coe; |
| else |
| priv->hw->rx_csum = 0; |
| /* No check needed because rx_coe has been set before and it will be |
| * fixed in case of issue. |
| */ |
| priv->hw->mac->rx_ipc(priv->hw); |
| |
| return 0; |
| } |
| |
| /** |
| * stmmac_interrupt - main ISR |
| * @irq: interrupt number. |
| * @dev_id: to pass the net device pointer. |
| * Description: this is the main driver interrupt service routine. |
| * It can call: |
| * o DMA service routine (to manage incoming frame reception and transmission |
| * status) |
| * o Core interrupts to manage: remote wake-up, management counter, LPI |
| * interrupts. |
| */ |
| static irqreturn_t stmmac_interrupt(int irq, void *dev_id) |
| { |
| struct net_device *dev = (struct net_device *)dev_id; |
| struct stmmac_priv *priv = netdev_priv(dev); |
| |
| if (priv->irq_wake) |
| pm_wakeup_event(priv->device, 0); |
| |
| if (unlikely(!dev)) { |
| pr_err("%s: invalid dev pointer\n", __func__); |
| return IRQ_NONE; |
| } |
| |
| /* To handle GMAC own interrupts */ |
| if (priv->plat->has_gmac) { |
| int status = priv->hw->mac->host_irq_status(priv->hw, |
| &priv->xstats); |
| if (unlikely(status)) { |
| /* For LPI we need to save the tx status */ |
| if (status & CORE_IRQ_TX_PATH_IN_LPI_MODE) |
| priv->tx_path_in_lpi_mode = true; |
| if (status & CORE_IRQ_TX_PATH_EXIT_LPI_MODE) |
| priv->tx_path_in_lpi_mode = false; |
| } |
| } |
| |
| /* To handle DMA interrupts */ |
| stmmac_dma_interrupt(priv); |
| |
| return IRQ_HANDLED; |
| } |
| |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| /* Polling receive - used by NETCONSOLE and other diagnostic tools |
| * to allow network I/O with interrupts disabled. |
| */ |
| static void stmmac_poll_controller(struct net_device *dev) |
| { |
| disable_irq(dev->irq); |
| stmmac_interrupt(dev->irq, dev); |
| enable_irq(dev->irq); |
| } |
| #endif |
| |
| /** |
| * stmmac_ioctl - Entry point for the Ioctl |
| * @dev: Device pointer. |
| * @rq: An IOCTL specefic structure, that can contain a pointer to |
| * a proprietary structure used to pass information to the driver. |
| * @cmd: IOCTL command |
| * Description: |
| * Currently it supports the phy_mii_ioctl(...) and HW time stamping. |
| */ |
| static int stmmac_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) |
| { |
| struct stmmac_priv *priv = netdev_priv(dev); |
| int ret = -EOPNOTSUPP; |
| |
| if (!netif_running(dev)) |
| return -EINVAL; |
| |
| switch (cmd) { |
| case SIOCGMIIPHY: |
| case SIOCGMIIREG: |
| case SIOCSMIIREG: |
| if (!priv->phydev) |
| return -EINVAL; |
| ret = phy_mii_ioctl(priv->phydev, rq, cmd); |
| break; |
| case SIOCSHWTSTAMP: |
| ret = stmmac_hwtstamp_ioctl(dev, rq); |
| break; |
| default: |
| break; |
| } |
| |
| return ret; |
| } |
| |
| #ifdef CONFIG_DEBUG_FS |
| static struct dentry *stmmac_fs_dir; |
| |
| static void sysfs_display_ring(void *head, int size, int extend_desc, |
| struct seq_file *seq) |
| { |
| int i; |
| struct dma_extended_desc *ep = (struct dma_extended_desc *)head; |
| struct dma_desc *p = (struct dma_desc *)head; |
| |
| for (i = 0; i < size; i++) { |
| u64 x; |
| if (extend_desc) { |
| x = *(u64 *) ep; |
| seq_printf(seq, "%d [0x%x]: 0x%x 0x%x 0x%x 0x%x\n", |
| i, (unsigned int)virt_to_phys(ep), |
| (unsigned int)x, (unsigned int)(x >> 32), |
| ep->basic.des2, ep->basic.des3); |
| ep++; |
| } else { |
| x = *(u64 *) p; |
| seq_printf(seq, "%d [0x%x]: 0x%x 0x%x 0x%x 0x%x\n", |
| i, (unsigned int)virt_to_phys(ep), |
| (unsigned int)x, (unsigned int)(x >> 32), |
| p->des2, p->des3); |
| p++; |
| } |
| seq_printf(seq, "\n"); |
| } |
| } |
| |
| static int stmmac_sysfs_ring_read(struct seq_file *seq, void *v) |
| { |
| struct net_device *dev = seq->private; |
| struct stmmac_priv *priv = netdev_priv(dev); |
| |
| if (priv->extend_desc) { |
| seq_printf(seq, "Extended RX descriptor ring:\n"); |
| sysfs_display_ring((void *)priv->dma_erx, DMA_RX_SIZE, 1, seq); |
| seq_printf(seq, "Extended TX descriptor ring:\n"); |
| sysfs_display_ring((void *)priv->dma_etx, DMA_TX_SIZE, 1, seq); |
| } else { |
| seq_printf(seq, "RX descriptor ring:\n"); |
| sysfs_display_ring((void *)priv->dma_rx, DMA_RX_SIZE, 0, seq); |
| seq_printf(seq, "TX descriptor ring:\n"); |
| sysfs_display_ring((void *)priv->dma_tx, DMA_TX_SIZE, 0, seq); |
| } |
| |
| return 0; |
| } |
| |
| static int stmmac_sysfs_ring_open(struct inode *inode, struct file *file) |
| { |
| return single_open(file, stmmac_sysfs_ring_read, inode->i_private); |
| } |
| |
| static const struct file_operations stmmac_rings_status_fops = { |
| .owner = THIS_MODULE, |
| .open = stmmac_sysfs_ring_open, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .release = single_release, |
| }; |
| |
| static int stmmac_sysfs_dma_cap_read(struct seq_file *seq, void *v) |
| { |
| struct net_device *dev = seq->private; |
| struct stmmac_priv *priv = netdev_priv(dev); |
| |
| if (!priv->hw_cap_support) { |
| seq_printf(seq, "DMA HW features not supported\n"); |
| return 0; |
| } |
| |
| seq_printf(seq, "==============================\n"); |
| seq_printf(seq, "\tDMA HW features\n"); |
| seq_printf(seq, "==============================\n"); |
| |
| seq_printf(seq, "\t10/100 Mbps %s\n", |
| (priv->dma_cap.mbps_10_100) ? "Y" : "N"); |
| seq_printf(seq, "\t1000 Mbps %s\n", |
| (priv->dma_cap.mbps_1000) ? "Y" : "N"); |
| seq_printf(seq, "\tHalf duple %s\n", |
| (priv->dma_cap.half_duplex) ? "Y" : "N"); |
| seq_printf(seq, "\tHash Filter: %s\n", |
| (priv->dma_cap.hash_filter) ? "Y" : "N"); |
| seq_printf(seq, "\tMultiple MAC address registers: %s\n", |
| (priv->dma_cap.multi_addr) ? "Y" : "N"); |
| seq_printf(seq, "\tPCS (TBI/SGMII/RTBI PHY interfatces): %s\n", |
| (priv->dma_cap.pcs) ? "Y" : "N"); |
| seq_printf(seq, "\tSMA (MDIO) Interface: %s\n", |
| (priv->dma_cap.sma_mdio) ? "Y" : "N"); |
| seq_printf(seq, "\tPMT Remote wake up: %s\n", |
| (priv->dma_cap.pmt_remote_wake_up) ? "Y" : "N"); |
| seq_printf(seq, "\tPMT Magic Frame: %s\n", |
| (priv->dma_cap.pmt_magic_frame) ? "Y" : "N"); |
| seq_printf(seq, "\tRMON module: %s\n", |
| (priv->dma_cap.rmon) ? "Y" : "N"); |
| seq_printf(seq, "\tIEEE 1588-2002 Time Stamp: %s\n", |
| (priv->dma_cap.time_stamp) ? "Y" : "N"); |
| seq_printf(seq, "\tIEEE 1588-2008 Advanced Time Stamp:%s\n", |
| (priv->dma_cap.atime_stamp) ? "Y" : "N"); |
| seq_printf(seq, "\t802.3az - Energy-Efficient Ethernet (EEE) %s\n", |
| (priv->dma_cap.eee) ? "Y" : "N"); |
| seq_printf(seq, "\tAV features: %s\n", (priv->dma_cap.av) ? "Y" : "N"); |
| seq_printf(seq, "\tChecksum Offload in TX: %s\n", |
| (priv->dma_cap.tx_coe) ? "Y" : "N"); |
| seq_printf(seq, "\tIP Checksum Offload (type1) in RX: %s\n", |
| (priv->dma_cap.rx_coe_type1) ? "Y" : "N"); |
| seq_printf(seq, "\tIP Checksum Offload (type2) in RX: %s\n", |
| (priv->dma_cap.rx_coe_type2) ? "Y" : "N"); |
| seq_printf(seq, "\tRXFIFO > 2048bytes: %s\n", |
| (priv->dma_cap.rxfifo_over_2048) ? "Y" : "N"); |
| seq_printf(seq, "\tNumber of Additional RX channel: %d\n", |
| priv->dma_cap.number_rx_channel); |
| seq_printf(seq, "\tNumber of Additional TX channel: %d\n", |
| priv->dma_cap.number_tx_channel); |
| seq_printf(seq, "\tEnhanced descriptors: %s\n", |
| (priv->dma_cap.enh_desc) ? "Y" : "N"); |
| |
| return 0; |
| } |
| |
| static int stmmac_sysfs_dma_cap_open(struct inode *inode, struct file *file) |
| { |
| return single_open(file, stmmac_sysfs_dma_cap_read, inode->i_private); |
| } |
| |
| static const struct file_operations stmmac_dma_cap_fops = { |
| .owner = THIS_MODULE, |
| .open = stmmac_sysfs_dma_cap_open, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .release = single_release, |
| }; |
| |
| static int stmmac_init_fs(struct net_device *dev) |
| { |
| struct stmmac_priv *priv = netdev_priv(dev); |
| |
| /* Create per netdev entries */ |
| priv->dbgfs_dir = debugfs_create_dir(dev->name, stmmac_fs_dir); |
| |
| if (!priv->dbgfs_dir || IS_ERR(priv->dbgfs_dir)) { |
| pr_err("ERROR %s/%s, debugfs create directory failed\n", |
| STMMAC_RESOURCE_NAME, dev->name); |
| |
| return -ENOMEM; |
| } |
| |
| /* Entry to report DMA RX/TX rings */ |
| priv->dbgfs_rings_status = |
| debugfs_create_file("descriptors_status", S_IRUGO, |
| priv->dbgfs_dir, dev, |
| &stmmac_rings_status_fops); |
| |
| if (!priv->dbgfs_rings_status || IS_ERR(priv->dbgfs_rings_status)) { |
| pr_info("ERROR creating stmmac ring debugfs file\n"); |
| debugfs_remove_recursive(priv->dbgfs_dir); |
| |
| return -ENOMEM; |
| } |
| |
| /* Entry to report the DMA HW features */ |
| priv->dbgfs_dma_cap = debugfs_create_file("dma_cap", S_IRUGO, |
| priv->dbgfs_dir, |
| dev, &stmmac_dma_cap_fops); |
| |
| if (!priv->dbgfs_dma_cap || IS_ERR(priv->dbgfs_dma_cap)) { |
| pr_info("ERROR creating stmmac MMC debugfs file\n"); |
| debugfs_remove_recursive(priv->dbgfs_dir); |
| |
| return -ENOMEM; |
| } |
| |
| return 0; |
| } |
| |
| static void stmmac_exit_fs(struct net_device *dev) |
| { |
| struct stmmac_priv *priv = netdev_priv(dev); |
| |
| debugfs_remove_recursive(priv->dbgfs_dir); |
| } |
| #endif /* CONFIG_DEBUG_FS */ |
| |
| static const struct net_device_ops stmmac_netdev_ops = { |
| .ndo_open = stmmac_open, |
| .ndo_start_xmit = stmmac_xmit, |
| .ndo_stop = stmmac_release, |
| .ndo_change_mtu = stmmac_change_mtu, |
| .ndo_fix_features = stmmac_fix_features, |
| .ndo_set_features = stmmac_set_features, |
| .ndo_set_rx_mode = stmmac_set_rx_mode, |
| .ndo_tx_timeout = stmmac_tx_timeout, |
| .ndo_do_ioctl = stmmac_ioctl, |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| .ndo_poll_controller = stmmac_poll_controller, |
| #endif |
| .ndo_set_mac_address = eth_mac_addr, |
| }; |
| |
| /** |
| * stmmac_hw_init - Init the MAC device |
| * @priv: driver private structure |
| * Description: this function is to configure the MAC device according to |
| * some platform parameters or the HW capability register. It prepares the |
| * driver to use either ring or chain modes and to setup either enhanced or |
| * normal descriptors. |
| */ |
| static int stmmac_hw_init(struct stmmac_priv *priv) |
| { |
| struct mac_device_info *mac; |
| |
| /* Identify the MAC HW device */ |
| if (priv->plat->has_gmac) { |
| priv->dev->priv_flags |= IFF_UNICAST_FLT; |
| mac = dwmac1000_setup(priv->ioaddr, |
| priv->plat->multicast_filter_bins, |
| priv->plat->unicast_filter_entries); |
| } else { |
| mac = dwmac100_setup(priv->ioaddr); |
| } |
| if (!mac) |
| return -ENOMEM; |
| |
| priv->hw = mac; |
| |
| /* Get and dump the chip ID */ |
| priv->synopsys_id = stmmac_get_synopsys_id(priv); |
| |
| /* To use the chained or ring mode */ |
| if (chain_mode) { |
| priv->hw->mode = &chain_mode_ops; |
| pr_info(" Chain mode enabled\n"); |
| priv->mode = STMMAC_CHAIN_MODE; |
| } else { |
| priv->hw->mode = &ring_mode_ops; |
| pr_info(" Ring mode enabled\n"); |
| priv->mode = STMMAC_RING_MODE; |
| } |
| |
| /* Get the HW capability (new GMAC newer than 3.50a) */ |
| priv->hw_cap_support = stmmac_get_hw_features(priv); |
| if (priv->hw_cap_support) { |
| pr_info(" DMA HW capability register supported"); |
| |
| /* We can override some gmac/dma configuration fields: e.g. |
| * enh_desc, tx_coe (e.g. that are passed through the |
| * platform) with the values from the HW capability |
| * register (if supported). |
| */ |
| priv->plat->enh_desc = priv->dma_cap.enh_desc; |
| priv->plat->pmt = priv->dma_cap.pmt_remote_wake_up; |
| |
| /* TXCOE doesn't work in thresh DMA mode */ |
| if (priv->plat->force_thresh_dma_mode) |
| priv->plat->tx_coe = 0; |
| else |
| priv->plat->tx_coe = priv->dma_cap.tx_coe; |
| |
| if (priv->dma_cap.rx_coe_type2) |
| priv->plat->rx_coe = STMMAC_RX_COE_TYPE2; |
| else if (priv->dma_cap.rx_coe_type1) |
| priv->plat->rx_coe = STMMAC_RX_COE_TYPE1; |
| |
| } else |
| pr_info(" No HW DMA feature register supported"); |
| |
| /* To use alternate (extended) or normal descriptor structures */ |
| stmmac_selec_desc_mode(priv); |
| |
| if (priv->plat->rx_coe) { |
| priv->hw->rx_csum = priv->plat->rx_coe; |
| pr_info(" RX Checksum Offload Engine supported (type %d)\n", |
| priv->plat->rx_coe); |
| } |
| if (priv->plat->tx_coe) |
| pr_info(" TX Checksum insertion supported\n"); |
| |
| if (priv->plat->pmt) { |
| pr_info(" Wake-Up On Lan supported\n"); |
| device_set_wakeup_capable(priv->device, 1); |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * stmmac_dvr_probe |
| * @device: device pointer |
| * @plat_dat: platform data pointer |
| * @res: stmmac resource pointer |
| * Description: this is the main probe function used to |
| * call the alloc_etherdev, allocate the priv structure. |
| * Return: |
| * returns 0 on success, otherwise errno. |
| */ |
| int stmmac_dvr_probe(struct device *device, |
| struct plat_stmmacenet_data *plat_dat, |
| struct stmmac_resources *res) |
| { |
| int ret = 0; |
| struct net_device *ndev = NULL; |
| struct stmmac_priv *priv; |
| |
| ndev = alloc_etherdev(sizeof(struct stmmac_priv)); |
| if (!ndev) |
| return -ENOMEM; |
| |
| SET_NETDEV_DEV(ndev, device); |
| |
| priv = netdev_priv(ndev); |
| priv->device = device; |
| priv->dev = ndev; |
| |
| stmmac_set_ethtool_ops(ndev); |
| priv->pause = pause; |
| priv->plat = plat_dat; |
| priv->ioaddr = res->addr; |
| priv->dev->base_addr = (unsigned long)res->addr; |
| |
| priv->dev->irq = res->irq; |
| priv->wol_irq = res->wol_irq; |
| priv->lpi_irq = res->lpi_irq; |
| |
| if (res->mac) |
| memcpy(priv->dev->dev_addr, res->mac, ETH_ALEN); |
| |
| dev_set_drvdata(device, priv->dev); |
| |
| /* Verify driver arguments */ |
| stmmac_verify_args(); |
| |
| /* Override with kernel parameters if supplied XXX CRS XXX |
| * this needs to have multiple instances |
| */ |
| if ((phyaddr >= 0) && (phyaddr <= 31)) |
| priv->plat->phy_addr = phyaddr; |
| |
| priv->stmmac_clk = devm_clk_get(priv->device, STMMAC_RESOURCE_NAME); |
| if (IS_ERR(priv->stmmac_clk)) { |
| dev_warn(priv->device, "%s: warning: cannot get CSR clock\n", |
| __func__); |
| /* If failed to obtain stmmac_clk and specific clk_csr value |
| * is NOT passed from the platform, probe fail. |
| */ |
| if (!priv->plat->clk_csr) { |
| ret = PTR_ERR(priv->stmmac_clk); |
| goto error_clk_get; |
| } else { |
| priv->stmmac_clk = NULL; |
| } |
| } |
| clk_prepare_enable(priv->stmmac_clk); |
| |
| priv->pclk = devm_clk_get(priv->device, "pclk"); |
| if (IS_ERR(priv->pclk)) { |
| if (PTR_ERR(priv->pclk) == -EPROBE_DEFER) { |
| ret = -EPROBE_DEFER; |
| goto error_pclk_get; |
| } |
| priv->pclk = NULL; |
| } |
| clk_prepare_enable(priv->pclk); |
| |
| priv->stmmac_rst = devm_reset_control_get(priv->device, |
| STMMAC_RESOURCE_NAME); |
| if (IS_ERR(priv->stmmac_rst)) { |
| if (PTR_ERR(priv->stmmac_rst) == -EPROBE_DEFER) { |
| ret = -EPROBE_DEFER; |
| goto error_hw_init; |
| } |
| dev_info(priv->device, "no reset control found\n"); |
| priv->stmmac_rst = NULL; |
| } |
| if (priv->stmmac_rst) |
| reset_control_deassert(priv->stmmac_rst); |
| |
| /* Init MAC and get the capabilities */ |
| ret = stmmac_hw_init(priv); |
| if (ret) |
| goto error_hw_init; |
| |
| ndev->netdev_ops = &stmmac_netdev_ops; |
| |
| ndev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | |
| NETIF_F_RXCSUM; |
| ndev->features |= ndev->hw_features | NETIF_F_HIGHDMA; |
| ndev->watchdog_timeo = msecs_to_jiffies(watchdog); |
| #ifdef STMMAC_VLAN_TAG_USED |
| /* Both mac100 and gmac support receive VLAN tag detection */ |
| ndev->features |= NETIF_F_HW_VLAN_CTAG_RX; |
| #endif |
| priv->msg_enable = netif_msg_init(debug, default_msg_level); |
| |
| if (flow_ctrl) |
| priv->flow_ctrl = FLOW_AUTO; /* RX/TX pause on */ |
| |
| /* Rx Watchdog is available in the COREs newer than the 3.40. |
| * In some case, for example on bugged HW this feature |
| * has to be disable and this can be done by passing the |
| * riwt_off field from the platform. |
| */ |
| if ((priv->synopsys_id >= DWMAC_CORE_3_50) && (!priv->plat->riwt_off)) { |
| priv->use_riwt = 1; |
| pr_info(" Enable RX Mitigation via HW Watchdog Timer\n"); |
| } |
| |
| netif_napi_add(ndev, &priv->napi, stmmac_poll, 64); |
| |
| spin_lock_init(&priv->lock); |
| spin_lock_init(&priv->tx_lock); |
| |
| ret = register_netdev(ndev); |
| if (ret) { |
| pr_err("%s: ERROR %i registering the device\n", __func__, ret); |
| goto error_netdev_register; |
| } |
| |
| /* If a specific clk_csr value is passed from the platform |
| * this means that the CSR Clock Range selection cannot be |
| * changed at run-time and it is fixed. Viceversa the driver'll try to |
| * set the MDC clock dynamically according to the csr actual |
| * clock input. |
| */ |
| if (!priv->plat->clk_csr) |
| stmmac_clk_csr_set(priv); |
| else |
| priv->clk_csr = priv->plat->clk_csr; |
| |
| stmmac_check_pcs_mode(priv); |
| |
| if (priv->pcs != STMMAC_PCS_RGMII && priv->pcs != STMMAC_PCS_TBI && |
| priv->pcs != STMMAC_PCS_RTBI) { |
| /* MDIO bus Registration */ |
| ret = stmmac_mdio_register(ndev); |
| if (ret < 0) { |
| pr_debug("%s: MDIO bus (id: %d) registration failed", |
| __func__, priv->plat->bus_id); |
| goto error_mdio_register; |
| } |
| } |
| |
| return 0; |
| |
| error_mdio_register: |
| unregister_netdev(ndev); |
| error_netdev_register: |
| netif_napi_del(&priv->napi); |
| error_hw_init: |
| clk_disable_unprepare(priv->pclk); |
| error_pclk_get: |
| clk_disable_unprepare(priv->stmmac_clk); |
| error_clk_get: |
| free_netdev(ndev); |
| |
| return ret; |
| } |
| EXPORT_SYMBOL_GPL(stmmac_dvr_probe); |
| |
| /** |
| * stmmac_dvr_remove |
| * @ndev: net device pointer |
| * Description: this function resets the TX/RX processes, disables the MAC RX/TX |
| * changes the link status, releases the DMA descriptor rings. |
| */ |
| int stmmac_dvr_remove(struct net_device *ndev) |
| { |
| struct stmmac_priv *priv = netdev_priv(ndev); |
| |
| pr_info("%s:\n\tremoving driver", __func__); |
| |
| priv->hw->dma->stop_rx(priv->ioaddr); |
| priv->hw->dma->stop_tx(priv->ioaddr); |
| |
| stmmac_set_mac(priv->ioaddr, false); |
| netif_carrier_off(ndev); |
| unregister_netdev(ndev); |
| if (priv->stmmac_rst) |
| reset_control_assert(priv->stmmac_rst); |
| clk_disable_unprepare(priv->pclk); |
| clk_disable_unprepare(priv->stmmac_clk); |
| if (priv->pcs != STMMAC_PCS_RGMII && priv->pcs != STMMAC_PCS_TBI && |
| priv->pcs != STMMAC_PCS_RTBI) |
| stmmac_mdio_unregister(ndev); |
| free_netdev(ndev); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(stmmac_dvr_remove); |
| |
| /** |
| * stmmac_suspend - suspend callback |
| * @ndev: net device pointer |
| * Description: this is the function to suspend the device and it is called |
| * by the platform driver to stop the network queue, release the resources, |
| * program the PMT register (for WoL), clean and release driver resources. |
| */ |
| int stmmac_suspend(struct net_device *ndev) |
| { |
| struct stmmac_priv *priv = netdev_priv(ndev); |
| unsigned long flags; |
| |
| if (!ndev || !netif_running(ndev)) |
| return 0; |
| |
| if (priv->phydev) |
| phy_stop(priv->phydev); |
| |
| spin_lock_irqsave(&priv->lock, flags); |
| |
| netif_device_detach(ndev); |
| netif_stop_queue(ndev); |
| |
| napi_disable(&priv->napi); |
| |
| /* Stop TX/RX DMA */ |
| priv->hw->dma->stop_tx(priv->ioaddr); |
| priv->hw->dma->stop_rx(priv->ioaddr); |
| |
| /* Enable Power down mode by programming the PMT regs */ |
| if (device_may_wakeup(priv->device)) { |
| priv->hw->mac->pmt(priv->hw, priv->wolopts); |
| priv->irq_wake = 1; |
| } else { |
| stmmac_set_mac(priv->ioaddr, false); |
| pinctrl_pm_select_sleep_state(priv->device); |
| /* Disable clock in case of PWM is off */ |
| clk_disable(priv->pclk); |
| clk_disable(priv->stmmac_clk); |
| } |
| spin_unlock_irqrestore(&priv->lock, flags); |
| |
| priv->oldlink = 0; |
| priv->speed = 0; |
| priv->oldduplex = -1; |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(stmmac_suspend); |
| |
| /** |
| * stmmac_resume - resume callback |
| * @ndev: net device pointer |
| * Description: when resume this function is invoked to setup the DMA and CORE |
| * in a usable state. |
| */ |
| int stmmac_resume(struct net_device *ndev) |
| { |
| struct stmmac_priv *priv = netdev_priv(ndev); |
| unsigned long flags; |
| |
| if (!netif_running(ndev)) |
| return 0; |
| |
| spin_lock_irqsave(&priv->lock, flags); |
| |
| /* Power Down bit, into the PM register, is cleared |
| * automatically as soon as a magic packet or a Wake-up frame |
| * is received. Anyway, it's better to manually clear |
| * this bit because it can generate problems while resuming |
| * from another devices (e.g. serial console). |
| */ |
| if (device_may_wakeup(priv->device)) { |
| priv->hw->mac->pmt(priv->hw, 0); |
| priv->irq_wake = 0; |
| } else { |
| pinctrl_pm_select_default_state(priv->device); |
| /* enable the clk prevously disabled */ |
| clk_enable(priv->stmmac_clk); |
| clk_enable(priv->pclk); |
| /* reset the phy so that it's ready */ |
| if (priv->mii) |
| stmmac_mdio_reset(priv->mii); |
| } |
| |
| netif_device_attach(ndev); |
| |
| priv->cur_rx = 0; |
| priv->dirty_rx = 0; |
| priv->dirty_tx = 0; |
| priv->cur_tx = 0; |
| stmmac_clear_descriptors(priv); |
| |
| stmmac_hw_setup(ndev, false); |
| stmmac_init_tx_coalesce(priv); |
| stmmac_set_rx_mode(ndev); |
| |
| napi_enable(&priv->napi); |
| |
| netif_start_queue(ndev); |
| |
| spin_unlock_irqrestore(&priv->lock, flags); |
| |
| if (priv->phydev) |
| phy_start(priv->phydev); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(stmmac_resume); |
| |
| #ifndef MODULE |
| static int __init stmmac_cmdline_opt(char *str) |
| { |
| char *opt; |
| |
| if (!str || !*str) |
| return -EINVAL; |
| while ((opt = strsep(&str, ",")) != NULL) { |
| if (!strncmp(opt, "debug:", 6)) { |
| if (kstrtoint(opt + 6, 0, &debug)) |
| goto err; |
| } else if (!strncmp(opt, "phyaddr:", 8)) { |
| if (kstrtoint(opt + 8, 0, &phyaddr)) |
| goto err; |
| } else if (!strncmp(opt, "buf_sz:", 7)) { |
| if (kstrtoint(opt + 7, 0, &buf_sz)) |
| goto err; |
| } else if (!strncmp(opt, "tc:", 3)) { |
| if (kstrtoint(opt + 3, 0, &tc)) |
| goto err; |
| } else if (!strncmp(opt, "watchdog:", 9)) { |
| if (kstrtoint(opt + 9, 0, &watchdog)) |
| goto err; |
| } else if (!strncmp(opt, "flow_ctrl:", 10)) { |
| if (kstrtoint(opt + 10, 0, &flow_ctrl)) |
| goto err; |
| } else if (!strncmp(opt, "pause:", 6)) { |
| if (kstrtoint(opt + 6, 0, &pause)) |
| goto err; |
| } else if (!strncmp(opt, "eee_timer:", 10)) { |
| if (kstrtoint(opt + 10, 0, &eee_timer)) |
| goto err; |
| } else if (!strncmp(opt, "chain_mode:", 11)) { |
| if (kstrtoint(opt + 11, 0, &chain_mode)) |
| goto err; |
| } |
| } |
| return 0; |
| |
| err: |
| pr_err("%s: ERROR broken module parameter conversion", __func__); |
| return -EINVAL; |
| } |
| |
| __setup("stmmaceth=", stmmac_cmdline_opt); |
| #endif /* MODULE */ |
| |
| static int __init stmmac_init(void) |
| { |
| #ifdef CONFIG_DEBUG_FS |
| /* Create debugfs main directory if it doesn't exist yet */ |
| if (!stmmac_fs_dir) { |
| stmmac_fs_dir = debugfs_create_dir(STMMAC_RESOURCE_NAME, NULL); |
| |
| if (!stmmac_fs_dir || IS_ERR(stmmac_fs_dir)) { |
| pr_err("ERROR %s, debugfs create directory failed\n", |
| STMMAC_RESOURCE_NAME); |
| |
| return -ENOMEM; |
| } |
| } |
| #endif |
| |
| return 0; |
| } |
| |
| static void __exit stmmac_exit(void) |
| { |
| #ifdef CONFIG_DEBUG_FS |
| debugfs_remove_recursive(stmmac_fs_dir); |
| #endif |
| } |
| |
| module_init(stmmac_init) |
| module_exit(stmmac_exit) |
| |
| MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet device driver"); |
| MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>"); |
| MODULE_LICENSE("GPL"); |