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- /*******************************************************************************
- 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>
- #ifdef CONFIG_STMMAC_DEBUG_FS
- #include <linux/debugfs.h>
- #include <linux/seq_file.h>
- #endif /* CONFIG_STMMAC_DEBUG_FS */
- #include <linux/net_tstamp.h>
- #include "stmmac_ptp.h"
- #include "stmmac.h"
- #define STMMAC_ALIGN(x) L1_CACHE_ALIGN(x)
- #define JUMBO_LEN 9000
- /* 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)");
- int phyaddr = -1;
- module_param(phyaddr, int, S_IRUGO);
- MODULE_PARM_DESC(phyaddr, "Physical device address");
- #define DMA_TX_SIZE 256
- static int dma_txsize = DMA_TX_SIZE;
- module_param(dma_txsize, int, S_IRUGO | S_IWUSR);
- MODULE_PARM_DESC(dma_txsize, "Number of descriptors in the TX list");
- #define DMA_RX_SIZE 256
- static int dma_rxsize = DMA_RX_SIZE;
- module_param(dma_rxsize, int, S_IRUGO | S_IWUSR);
- MODULE_PARM_DESC(dma_rxsize, "Number of descriptors in the RX list");
- 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 DMA_BUFFER_SIZE BUF_SIZE_2KiB
- static int buf_sz = DMA_BUFFER_SIZE;
- module_param(buf_sz, int, S_IRUGO | S_IWUSR);
- MODULE_PARM_DESC(buf_sz, "DMA buffer size");
- 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_STMMAC_DEBUG_FS
- static int stmmac_init_fs(struct net_device *dev);
- static void stmmac_exit_fs(void);
- #endif
- #define STMMAC_COAL_TIMER(x) (jiffies + usecs_to_jiffies(x))
- /**
- * stmmac_verify_args - verify the driver parameters.
- * Description: it verifies if some wrong parameter is passed to the driver.
- * Note that wrong parameters are replaced with the default values.
- */
- static void stmmac_verify_args(void)
- {
- if (unlikely(watchdog < 0))
- watchdog = TX_TIMEO;
- if (unlikely(dma_rxsize < 0))
- dma_rxsize = DMA_RX_SIZE;
- if (unlikely(dma_txsize < 0))
- dma_txsize = DMA_TX_SIZE;
- if (unlikely((buf_sz < DMA_BUFFER_SIZE) || (buf_sz > BUF_SIZE_16KiB)))
- buf_sz = DMA_BUFFER_SIZE;
- 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)
- {
- int j;
- pr_debug("len = %d byte, buf addr: 0x%p", len, buf);
- for (j = 0; j < len; j++) {
- if ((j % 16) == 0)
- pr_debug("\n %03x:", j);
- pr_debug(" %02x", buf[j]);
- }
- pr_debug("\n");
- }
- /* minimum number of free TX descriptors required to wake up TX process */
- #define STMMAC_TX_THRESH(x) (x->dma_tx_size/4)
- static inline u32 stmmac_tx_avail(struct stmmac_priv *priv)
- {
- return priv->dirty_tx + priv->dma_tx_size - priv->cur_tx - 1;
- }
- /**
- * 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 for 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->ioaddr);
- }
- /**
- * stmmac_disable_eee_mode: disable/exit from EEE
- * @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->ioaddr);
- 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 EEE support has been enabled while configuring the driver,
- * if the GMAC actually supports the EEE (from the HW cap reg) and the
- * phy can also manage EEE, so enable the LPI state and start the timer
- * to verify if the tx path can enter in LPI state.
- */
- bool stmmac_eee_init(struct stmmac_priv *priv)
- {
- 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;
- /* MAC core supports the EEE feature. */
- if (priv->dma_cap.eee) {
- /* Check if the PHY supports EEE */
- if (phy_init_eee(priv->phydev, 1))
- goto out;
- if (!priv->eee_active) {
- priv->eee_active = 1;
- init_timer(&priv->eee_ctrl_timer);
- priv->eee_ctrl_timer.function = stmmac_eee_ctrl_timer;
- priv->eee_ctrl_timer.data = (unsigned long)priv;
- priv->eee_ctrl_timer.expires = STMMAC_LPI_T(eee_timer);
- add_timer(&priv->eee_ctrl_timer);
- priv->hw->mac->set_eee_timer(priv->ioaddr,
- STMMAC_DEFAULT_LIT_LS,
- priv->tx_lpi_timer);
- } else
- /* Set HW EEE according to the speed */
- priv->hw->mac->set_eee_pls(priv->ioaddr,
- priv->phydev->link);
- pr_info("stmmac: Energy-Efficient Ethernet initialized\n");
- ret = true;
- }
- 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_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 timespec 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;
- 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;
- switch (config.tx_type) {
- case HWTSTAMP_TX_OFF:
- priv->hwts_tx_en = 0;
- break;
- case HWTSTAMP_TX_ON:
- priv->hwts_tx_en = 1;
- break;
- default:
- 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);
- 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 */
- priv->hw->ptp->config_sub_second_increment(priv->ioaddr);
- /* calculate default added value:
- * formula is :
- * addend = (2^32)/freq_div_ratio;
- * where, freq_div_ratio = STMMAC_SYSCLOCK/50MHz
- * hence, addend = ((2^32) * 50MHz)/STMMAC_SYSCLOCK;
- * NOTE: STMMAC_SYSCLOCK should be >= 50MHz to
- * achive 20ns accuracy.
- *
- * 2^x * y == (y << x), hence
- * 2^32 * 50000000 ==> (50000000 << 32)
- */
- temp = (u64) (50000000ULL << 32);
- priv->default_addend = div_u64(temp, STMMAC_SYSCLOCK);
- priv->hw->ptp->config_addend(priv->ioaddr,
- priv->default_addend);
- /* initialize system time */
- getnstimeofday(&now);
- priv->hw->ptp->init_systime(priv->ioaddr, 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 v2.
- * This is done by looking at the HW cap. register.
- * Also it 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;
- if (netif_msg_hw(priv)) {
- if (priv->dma_cap.time_stamp) {
- pr_debug("IEEE 1588-2002 Time Stamp supported\n");
- priv->adv_ts = 0;
- }
- if (priv->dma_cap.atime_stamp && priv->extend_desc) {
- pr_debug
- ("IEEE 1588-2008 Advanced Time Stamp supported\n");
- priv->adv_ts = 1;
- }
- }
- 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)
- {
- stmmac_ptp_unregister(priv);
- }
- /**
- * stmmac_adjust_link
- * @dev: net device structure
- * Description: it adjusts the link parameters.
- */
- 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->ioaddr, 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);
- /* 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);
- spin_unlock_irqrestore(&priv->lock, flags);
- }
- /**
- * 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;
- priv->oldlink = 0;
- priv->speed = 0;
- priv->oldduplex = -1;
- 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(phydev)) {
- pr_err("%s: Could not attach to PHY\n", dev->name);
- return PTR_ERR(phydev);
- }
- /* Stop Advertising 1000BASE Capability if interface is not GMII */
- if ((interface == PHY_INTERFACE_MODE_MII) ||
- (interface == PHY_INTERFACE_MODE_RMII))
- 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 (phydev->phy_id == 0) {
- phy_disconnect(phydev);
- return -ENODEV;
- }
- 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)
- {
- unsigned int txsize = priv->dma_tx_size;
- unsigned int rxsize = priv->dma_rx_size;
- if (priv->extend_desc) {
- pr_info("Extended RX descriptor ring:\n");
- stmmac_display_ring((void *)priv->dma_erx, rxsize, 1);
- pr_info("Extended TX descriptor ring:\n");
- stmmac_display_ring((void *)priv->dma_etx, txsize, 1);
- } else {
- pr_info("RX descriptor ring:\n");
- stmmac_display_ring((void *)priv->dma_rx, rxsize, 0);
- pr_info("TX descriptor ring:\n");
- stmmac_display_ring((void *)priv->dma_tx, txsize, 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 >= DMA_BUFFER_SIZE)
- ret = BUF_SIZE_2KiB;
- else
- ret = DMA_BUFFER_SIZE;
- 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;
- unsigned int txsize = priv->dma_tx_size;
- unsigned int rxsize = priv->dma_rx_size;
- /* Clear the Rx/Tx descriptors */
- for (i = 0; i < rxsize; i++)
- if (priv->extend_desc)
- priv->hw->desc->init_rx_desc(&priv->dma_erx[i].basic,
- priv->use_riwt, priv->mode,
- (i == rxsize - 1));
- else
- priv->hw->desc->init_rx_desc(&priv->dma_rx[i],
- priv->use_riwt, priv->mode,
- (i == rxsize - 1));
- for (i = 0; i < txsize; i++)
- if (priv->extend_desc)
- priv->hw->desc->init_tx_desc(&priv->dma_etx[i].basic,
- priv->mode,
- (i == txsize - 1));
- else
- priv->hw->desc->init_tx_desc(&priv->dma_tx[i],
- priv->mode,
- (i == txsize - 1));
- }
- static int stmmac_init_rx_buffers(struct stmmac_priv *priv, struct dma_desc *p,
- int i)
- {
- struct sk_buff *skb;
- skb = __netdev_alloc_skb(priv->dev, priv->dma_buf_sz + NET_IP_ALIGN,
- GFP_KERNEL);
- if (unlikely(skb == NULL)) {
- pr_err("%s: Rx init fails; skb is NULL\n", __func__);
- return 1;
- }
- skb_reserve(skb, NET_IP_ALIGN);
- priv->rx_skbuff[i] = skb;
- priv->rx_skbuff_dma[i] = dma_map_single(priv->device, skb->data,
- priv->dma_buf_sz,
- DMA_FROM_DEVICE);
- p->des2 = priv->rx_skbuff_dma[i];
- if ((priv->mode == STMMAC_RING_MODE) &&
- (priv->dma_buf_sz == BUF_SIZE_16KiB))
- priv->hw->ring->init_desc3(p);
- return 0;
- }
- /**
- * init_dma_desc_rings - init the RX/TX descriptor rings
- * @dev: net device structure
- * Description: this function initializes the DMA RX/TX descriptors
- * and allocates the socket buffers. It suppors the chained and ring
- * modes.
- */
- static void init_dma_desc_rings(struct net_device *dev)
- {
- int i;
- struct stmmac_priv *priv = netdev_priv(dev);
- unsigned int txsize = priv->dma_tx_size;
- unsigned int rxsize = priv->dma_rx_size;
- unsigned int bfsize = 0;
- /* Set the max buffer size according to the DESC mode
- * and the MTU. Note that RING mode allows 16KiB bsize.
- */
- if (priv->mode == STMMAC_RING_MODE)
- bfsize = priv->hw->ring->set_16kib_bfsize(dev->mtu);
- if (bfsize < BUF_SIZE_16KiB)
- bfsize = stmmac_set_bfsize(dev->mtu, priv->dma_buf_sz);
- if (netif_msg_probe(priv))
- pr_debug("%s: txsize %d, rxsize %d, bfsize %d\n", __func__,
- txsize, rxsize, bfsize);
- if (priv->extend_desc) {
- priv->dma_erx = dma_alloc_coherent(priv->device, rxsize *
- sizeof(struct
- dma_extended_desc),
- &priv->dma_rx_phy,
- GFP_KERNEL);
- priv->dma_etx = dma_alloc_coherent(priv->device, txsize *
- sizeof(struct
- dma_extended_desc),
- &priv->dma_tx_phy,
- GFP_KERNEL);
- if ((!priv->dma_erx) || (!priv->dma_etx))
- return;
- } else {
- priv->dma_rx = dma_alloc_coherent(priv->device, rxsize *
- sizeof(struct dma_desc),
- &priv->dma_rx_phy,
- GFP_KERNEL);
- priv->dma_tx = dma_alloc_coherent(priv->device, txsize *
- sizeof(struct dma_desc),
- &priv->dma_tx_phy,
- GFP_KERNEL);
- if ((!priv->dma_rx) || (!priv->dma_tx))
- return;
- }
- priv->rx_skbuff_dma = kmalloc_array(rxsize, sizeof(dma_addr_t),
- GFP_KERNEL);
- priv->rx_skbuff = kmalloc_array(rxsize, sizeof(struct sk_buff *),
- GFP_KERNEL);
- priv->tx_skbuff_dma = kmalloc_array(txsize, sizeof(dma_addr_t),
- GFP_KERNEL);
- priv->tx_skbuff = kmalloc_array(txsize, sizeof(struct sk_buff *),
- GFP_KERNEL);
- 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 < rxsize; i++) {
- struct dma_desc *p;
- if (priv->extend_desc)
- p = &((priv->dma_erx + i)->basic);
- else
- p = priv->dma_rx + i;
- if (stmmac_init_rx_buffers(priv, p, i))
- break;
- 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 - rxsize);
- priv->dma_buf_sz = bfsize;
- buf_sz = bfsize;
- /* Setup the chained descriptor addresses */
- if (priv->mode == STMMAC_CHAIN_MODE) {
- if (priv->extend_desc) {
- priv->hw->chain->init(priv->dma_erx, priv->dma_rx_phy,
- rxsize, 1);
- priv->hw->chain->init(priv->dma_etx, priv->dma_tx_phy,
- txsize, 1);
- } else {
- priv->hw->chain->init(priv->dma_rx, priv->dma_rx_phy,
- rxsize, 0);
- priv->hw->chain->init(priv->dma_tx, priv->dma_tx_phy,
- txsize, 0);
- }
- }
- /* TX INITIALIZATION */
- for (i = 0; i < txsize; 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] = 0;
- priv->tx_skbuff[i] = NULL;
- }
- priv->dirty_tx = 0;
- priv->cur_tx = 0;
- stmmac_clear_descriptors(priv);
- if (netif_msg_hw(priv))
- stmmac_display_rings(priv);
- }
- static void dma_free_rx_skbufs(struct stmmac_priv *priv)
- {
- int i;
- for (i = 0; i < priv->dma_rx_size; 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;
- }
- }
- static void dma_free_tx_skbufs(struct stmmac_priv *priv)
- {
- int i;
- for (i = 0; i < priv->dma_tx_size; i++) {
- if (priv->tx_skbuff[i] != NULL) {
- 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])
- dma_unmap_single(priv->device,
- priv->tx_skbuff_dma[i],
- priv->hw->desc->get_tx_len(p),
- DMA_TO_DEVICE);
- dev_kfree_skb_any(priv->tx_skbuff[i]);
- priv->tx_skbuff[i] = NULL;
- priv->tx_skbuff_dma[i] = 0;
- }
- }
- }
- 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,
- priv->dma_tx_size * sizeof(struct dma_desc),
- priv->dma_tx, priv->dma_tx_phy);
- dma_free_coherent(priv->device,
- priv->dma_rx_size * sizeof(struct dma_desc),
- priv->dma_rx, priv->dma_rx_phy);
- } else {
- dma_free_coherent(priv->device, priv->dma_tx_size *
- sizeof(struct dma_extended_desc),
- priv->dma_etx, priv->dma_tx_phy);
- dma_free_coherent(priv->device, priv->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 sets the DMA operation mode: tx/rx DMA thresholds
- * or Store-And-Forward capability.
- */
- static void stmmac_dma_operation_mode(struct stmmac_priv *priv)
- {
- if (likely(priv->plat->force_sf_dma_mode ||
- ((priv->plat->tx_coe) && (!priv->no_csum_insertion)))) {
- /*
- * 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);
- tc = SF_DMA_MODE;
- } else
- priv->hw->dma->dma_mode(priv->ioaddr, tc, SF_DMA_MODE);
- }
- /**
- * stmmac_tx_clean:
- * @priv: driver private structure
- * Description: it reclaims resources after transmission completes.
- */
- static void stmmac_tx_clean(struct stmmac_priv *priv)
- {
- unsigned int txsize = priv->dma_tx_size;
- spin_lock(&priv->tx_lock);
- priv->xstats.tx_clean++;
- while (priv->dirty_tx != priv->cur_tx) {
- int last;
- unsigned int entry = priv->dirty_tx % txsize;
- struct sk_buff *skb = priv->tx_skbuff[entry];
- struct dma_desc *p;
- if (priv->extend_desc)
- p = (struct dma_desc *)(priv->dma_etx + entry);
- else
- p = priv->dma_tx + entry;
- /* Check if the descriptor is owned by the DMA. */
- if (priv->hw->desc->get_tx_owner(p))
- break;
- /* Verify tx error by looking at the last segment. */
- last = priv->hw->desc->get_tx_ls(p);
- if (likely(last)) {
- int tx_error =
- priv->hw->desc->tx_status(&priv->dev->stats,
- &priv->xstats, p,
- priv->ioaddr);
- if (likely(tx_error == 0)) {
- priv->dev->stats.tx_packets++;
- priv->xstats.tx_pkt_n++;
- } else
- priv->dev->stats.tx_errors++;
- stmmac_get_tx_hwtstamp(priv, entry, skb);
- }
- if (netif_msg_tx_done(priv))
- pr_debug("%s: curr %d, dirty %d\n", __func__,
- priv->cur_tx, priv->dirty_tx);
- if (likely(priv->tx_skbuff_dma[entry])) {
- dma_unmap_single(priv->device,
- priv->tx_skbuff_dma[entry],
- priv->hw->desc->get_tx_len(p),
- DMA_TO_DEVICE);
- priv->tx_skbuff_dma[entry] = 0;
- }
- priv->hw->ring->clean_desc3(priv, p);
- if (likely(skb != NULL)) {
- dev_kfree_skb(skb);
- priv->tx_skbuff[entry] = NULL;
- }
- priv->hw->desc->release_tx_desc(p, priv->mode);
- priv->dirty_tx++;
- }
- if (unlikely(netif_queue_stopped(priv->dev) &&
- stmmac_tx_avail(priv) > STMMAC_TX_THRESH(priv))) {
- netif_tx_lock(priv->dev);
- if (netif_queue_stopped(priv->dev) &&
- stmmac_tx_avail(priv) > STMMAC_TX_THRESH(priv)) {
- 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: irq tx error mng function
- * @priv: driver private structure
- * Description: it cleans the descriptors and restarts the transmission
- * in case of errors.
- */
- static void stmmac_tx_err(struct stmmac_priv *priv)
- {
- int i;
- int txsize = priv->dma_tx_size;
- netif_stop_queue(priv->dev);
- priv->hw->dma->stop_tx(priv->ioaddr);
- dma_free_tx_skbufs(priv);
- for (i = 0; i < txsize; i++)
- if (priv->extend_desc)
- priv->hw->desc->init_tx_desc(&priv->dma_etx[i].basic,
- priv->mode,
- (i == txsize - 1));
- else
- priv->hw->desc->init_tx_desc(&priv->dma_tx[i],
- priv->mode,
- (i == txsize - 1));
- priv->dirty_tx = 0;
- priv->cur_tx = 0;
- 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 to understand which type of interrupt
- * happened. In case of there is a Normal interrupt and either TX or RX
- * interrupt happened so the NAPI is scheduled.
- */
- static void stmmac_dma_interrupt(struct stmmac_priv *priv)
- {
- int status;
- 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(tc != SF_DMA_MODE) && (tc <= 256)) {
- tc += 64;
- priv->hw->dma->dma_mode(priv->ioaddr, tc, SF_DMA_MODE);
- 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");
- }
- 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 looks at the extended descriptors are
- * supported by the HW cap. 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((void __iomem *)
- priv->dev->base_addr,
- priv->dev->dev_addr, 0);
- if (!is_valid_ether_addr(priv->dev->dev_addr))
- eth_hw_addr_random(priv->dev);
- }
- pr_warn("%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, burst_len = 0;
- int mixed_burst = 0;
- int atds = 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;
- burst_len = priv->plat->dma_cfg->burst_len;
- }
- if (priv->extend_desc && (priv->mode == STMMAC_RING_MODE))
- atds = 1;
- return priv->hw->dma->init(priv->ioaddr, pbl, fixed_burst, mixed_burst,
- burst_len, priv->dma_tx_phy,
- priv->dma_rx_phy, atds);
- }
- /**
- * 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_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;
- clk_prepare_enable(priv->stmmac_clk);
- 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);
- goto phy_error;
- }
- }
- /* Create and initialize the TX/RX descriptors chains. */
- priv->dma_tx_size = STMMAC_ALIGN(dma_txsize);
- priv->dma_rx_size = STMMAC_ALIGN(dma_rxsize);
- priv->dma_buf_sz = STMMAC_ALIGN(buf_sz);
- init_dma_desc_rings(dev);
- /* DMA initialization and SW reset */
- ret = stmmac_init_dma_engine(priv);
- if (ret < 0) {
- pr_err("%s: DMA initialization failed\n", __func__);
- goto init_error;
- }
- /* Copy the MAC addr into the HW */
- priv->hw->mac->set_umac_addr(priv->ioaddr, 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->ioaddr);
- /* 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 != -ENXIO) {
- 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;
- }
- }
- /* Enable the MAC Rx/Tx */
- stmmac_set_mac(priv->ioaddr, true);
- /* Set the HW DMA mode and the COE */
- stmmac_dma_operation_mode(priv);
- /* Extra statistics */
- memset(&priv->xstats, 0, sizeof(struct stmmac_extra_stats));
- priv->xstats.threshold = tc;
- stmmac_mmc_setup(priv);
- ret = stmmac_init_ptp(priv);
- if (ret)
- pr_warn("%s: failed PTP initialisation\n", __func__);
- #ifdef CONFIG_STMMAC_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->ioaddr);
- priv->hw->dma->dump_regs(priv->ioaddr);
- }
- if (priv->phydev)
- phy_start(priv->phydev);
- priv->tx_lpi_timer = STMMAC_DEFAULT_TWT_LS;
- priv->eee_enabled = stmmac_eee_init(priv);
- stmmac_init_tx_coalesce(priv);
- 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->ioaddr, 0);
- 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);
- if (priv->phydev)
- phy_disconnect(priv->phydev);
- phy_error:
- clk_disable_unprepare(priv->stmmac_clk);
- 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 != -ENXIO)
- 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_STMMAC_DEBUG_FS
- stmmac_exit_fs();
- #endif
- clk_disable_unprepare(priv->stmmac_clk);
- 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 txsize = priv->dma_tx_size;
- unsigned int entry;
- int i, csum_insertion = 0, is_jumbo = 0;
- int nfrags = skb_shinfo(skb)->nr_frags;
- struct dma_desc *desc, *first;
- unsigned int nopaged_len = skb_headlen(skb);
- if (unlikely(stmmac_tx_avail(priv) < nfrags + 1)) {
- 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;
- }
- spin_lock(&priv->tx_lock);
- if (priv->tx_path_in_lpi_mode)
- stmmac_disable_eee_mode(priv);
- entry = priv->cur_tx % txsize;
- csum_insertion = (skb->ip_summed == CHECKSUM_PARTIAL);
- if (priv->extend_desc)
- desc = (struct dma_desc *)(priv->dma_etx + entry);
- else
- desc = priv->dma_tx + entry;
- first = desc;
- priv->tx_skbuff[entry] = skb;
- /* To program the descriptors according to the size of the frame */
- if (priv->mode == STMMAC_RING_MODE) {
- is_jumbo = priv->hw->ring->is_jumbo_frm(skb->len,
- priv->plat->enh_desc);
- if (unlikely(is_jumbo))
- entry = priv->hw->ring->jumbo_frm(priv, skb,
- csum_insertion);
- } else {
- is_jumbo = priv->hw->chain->is_jumbo_frm(skb->len,
- priv->plat->enh_desc);
- if (unlikely(is_jumbo))
- entry = priv->hw->chain->jumbo_frm(priv, skb,
- csum_insertion);
- }
- if (likely(!is_jumbo)) {
- desc->des2 = dma_map_single(priv->device, skb->data,
- nopaged_len, DMA_TO_DEVICE);
- priv->tx_skbuff_dma[entry] = desc->des2;
- priv->hw->desc->prepare_tx_desc(desc, 1, nopaged_len,
- csum_insertion, priv->mode);
- } else
- desc = first;
- for (i = 0; i < nfrags; i++) {
- const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
- int len = skb_frag_size(frag);
- entry = (++priv->cur_tx) % txsize;
- if (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);
- priv->tx_skbuff_dma[entry] = desc->des2;
- priv->tx_skbuff[entry] = NULL;
- priv->hw->desc->prepare_tx_desc(desc, 0, len, csum_insertion,
- priv->mode);
- wmb();
- priv->hw->desc->set_tx_owner(desc);
- wmb();
- }
- /* Finalize the latest segment. */
- priv->hw->desc->close_tx_desc(desc);
- wmb();
- /* According to the coalesce parameter the IC bit for the latest
- * segment could be reset and the timer re-started to invoke the
- * stmmac_tx function. This approach takes care about the fragments.
- */
- priv->tx_count_frames += nfrags + 1;
- if (priv->tx_coal_frames > priv->tx_count_frames) {
- priv->hw->desc->clear_tx_ic(desc);
- priv->xstats.tx_reset_ic_bit++;
- mod_timer(&priv->txtimer,
- STMMAC_COAL_TIMER(priv->tx_coal_timer));
- } else
- priv->tx_count_frames = 0;
- /* To avoid raise condition */
- priv->hw->desc->set_tx_owner(first);
- wmb();
- priv->cur_tx++;
- if (netif_msg_pktdata(priv)) {
- pr_debug("%s: curr %d dirty=%d entry=%d, first=%p, nfrags=%d",
- __func__, (priv->cur_tx % txsize),
- (priv->dirty_tx % txsize), entry, first, nfrags);
- if (priv->extend_desc)
- stmmac_display_ring((void *)priv->dma_etx, txsize, 1);
- else
- stmmac_display_ring((void *)priv->dma_tx, txsize, 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;
- 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);
- }
- if (!priv->hwts_tx_en)
- skb_tx_timestamp(skb);
- priv->hw->dma->enable_dma_transmission(priv->ioaddr);
- spin_unlock(&priv->tx_lock);
- return NETDEV_TX_OK;
- }
- /**
- * 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)
- {
- unsigned int rxsize = priv->dma_rx_size;
- int bfsize = priv->dma_buf_sz;
- for (; priv->cur_rx - priv->dirty_rx > 0; priv->dirty_rx++) {
- unsigned int entry = priv->dirty_rx % rxsize;
- 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 == NULL))
- break;
- priv->rx_skbuff[entry] = skb;
- priv->rx_skbuff_dma[entry] =
- dma_map_single(priv->device, skb->data, bfsize,
- DMA_FROM_DEVICE);
- p->des2 = priv->rx_skbuff_dma[entry];
- priv->hw->ring->refill_desc3(priv, p);
- if (netif_msg_rx_status(priv))
- pr_debug("\trefill entry #%d\n", entry);
- }
- wmb();
- priv->hw->desc->set_rx_owner(p);
- wmb();
- }
- }
- /**
- * stmmac_rx_refill: refill used skb preallocated buffers
- * @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 rxsize = priv->dma_rx_size;
- unsigned int entry = priv->cur_rx % rxsize;
- unsigned int next_entry;
- unsigned int count = 0;
- int coe = priv->plat->rx_coe;
- if (netif_msg_rx_status(priv)) {
- pr_debug("%s: descriptor ring:\n", __func__);
- if (priv->extend_desc)
- stmmac_display_ring((void *)priv->dma_erx, rxsize, 1);
- else
- stmmac_display_ring((void *)priv->dma_rx, rxsize, 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;
- if (priv->hw->desc->get_rx_owner(p))
- break;
- count++;
- next_entry = (++priv->cur_rx) % rxsize;
- if (priv->extend_desc)
- prefetch(priv->dma_erx + next_entry);
- else
- prefetch(priv->dma_rx + next_entry);
- /* read the status of the incoming frame */
- status = priv->hw->desc->rx_status(&priv->dev->stats,
- &priv->xstats, p);
- 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);
- /* 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);
- }
- skb = priv->rx_skbuff[entry];
- if (unlikely(!skb)) {
- pr_err("%s: Inconsistent Rx descriptor chain\n",
- priv->dev->name);
- priv->dev->stats.rx_dropped++;
- break;
- }
- prefetch(skb->data - NET_IP_ALIGN);
- priv->rx_skbuff[entry] = NULL;
- stmmac_get_rx_hwtstamp(priv, entry, skb);
- skb_put(skb, frame_len);
- dma_unmap_single(priv->device,
- priv->rx_skbuff_dma[entry],
- priv->dma_buf_sz, DMA_FROM_DEVICE);
- if (netif_msg_pktdata(priv)) {
- pr_debug("frame received (%dbytes)", frame_len);
- print_pkt(skb->data, frame_len);
- }
- 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);
- }
- /* Configuration changes (passed on by ifconfig) */
- static int stmmac_config(struct net_device *dev, struct ifmap *map)
- {
- if (dev->flags & IFF_UP) /* can't act on a running interface */
- return -EBUSY;
- /* Don't allow changing the I/O address */
- if (map->base_addr != dev->base_addr) {
- pr_warn("%s: can't change I/O address\n", dev->name);
- return -EOPNOTSUPP;
- }
- /* Don't allow changing the IRQ */
- if (map->irq != dev->irq) {
- pr_warn("%s: not change IRQ number %d\n", dev->name, dev->irq);
- return -EOPNOTSUPP;
- }
- return 0;
- }
- /**
- * 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);
- spin_lock(&priv->lock);
- priv->hw->mac->set_filter(dev, priv->synopsys_id);
- spin_unlock(&priv->lock);
- }
- /**
- * 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 ((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;
- else if (priv->plat->rx_coe == STMMAC_RX_COE_TYPE1)
- features &= ~NETIF_F_IPV6_CSUM;
- if (!priv->plat->tx_coe)
- features &= ~NETIF_F_ALL_CSUM;
- /* 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_ALL_CSUM;
- return features;
- }
- /**
- * 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 calls the DMA ISR and also the core ISR to manage PMT, MMC, 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 (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((void __iomem *)
- dev->base_addr,
- &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_STMMAC_DEBUG_FS
- static struct dentry *stmmac_fs_dir;
- static struct dentry *stmmac_rings_status;
- static struct dentry *stmmac_dma_cap;
- 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);
- unsigned int txsize = priv->dma_tx_size;
- unsigned int rxsize = priv->dma_rx_size;
- if (priv->extend_desc) {
- seq_printf(seq, "Extended RX descriptor ring:\n");
- sysfs_display_ring((void *)priv->dma_erx, rxsize, 1, seq);
- seq_printf(seq, "Extended TX descriptor ring:\n");
- sysfs_display_ring((void *)priv->dma_etx, txsize, 1, seq);
- } else {
- seq_printf(seq, "RX descriptor ring:\n");
- sysfs_display_ring((void *)priv->dma_rx, rxsize, 0, seq);
- seq_printf(seq, "TX descriptor ring:\n");
- sysfs_display_ring((void *)priv->dma_tx, txsize, 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)
- {
- /* Create debugfs entries */
- 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;
- }
- /* Entry to report DMA RX/TX rings */
- stmmac_rings_status = debugfs_create_file("descriptors_status",
- S_IRUGO, stmmac_fs_dir, dev,
- &stmmac_rings_status_fops);
- if (!stmmac_rings_status || IS_ERR(stmmac_rings_status)) {
- pr_info("ERROR creating stmmac ring debugfs file\n");
- debugfs_remove(stmmac_fs_dir);
- return -ENOMEM;
- }
- /* Entry to report the DMA HW features */
- stmmac_dma_cap = debugfs_create_file("dma_cap", S_IRUGO, stmmac_fs_dir,
- dev, &stmmac_dma_cap_fops);
- if (!stmmac_dma_cap || IS_ERR(stmmac_dma_cap)) {
- pr_info("ERROR creating stmmac MMC debugfs file\n");
- debugfs_remove(stmmac_rings_status);
- debugfs_remove(stmmac_fs_dir);
- return -ENOMEM;
- }
- return 0;
- }
- static void stmmac_exit_fs(void)
- {
- debugfs_remove(stmmac_rings_status);
- debugfs_remove(stmmac_dma_cap);
- debugfs_remove(stmmac_fs_dir);
- }
- #endif /* CONFIG_STMMAC_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_rx_mode = stmmac_set_rx_mode,
- .ndo_tx_timeout = stmmac_tx_timeout,
- .ndo_do_ioctl = stmmac_ioctl,
- .ndo_set_config = stmmac_config,
- #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 detects which MAC device
- * (GMAC/MAC10-100) has to attached, checks the HW capability
- * (if supported) and sets the driver's features (for example
- * to use the ring or chaine mode or support the normal/enh
- * descriptor structure).
- */
- static int stmmac_hw_init(struct stmmac_priv *priv)
- {
- int ret;
- 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);
- } 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->chain = &chain_mode_ops;
- pr_info(" Chain mode enabled\n");
- priv->mode = STMMAC_CHAIN_MODE;
- } else {
- priv->hw->ring = &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;
- 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);
- ret = priv->hw->mac->rx_ipc(priv->ioaddr);
- if (!ret) {
- pr_warn(" RX IPC Checksum Offload not configured.\n");
- priv->plat->rx_coe = STMMAC_RX_COE_NONE;
- }
- if (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
- * @addr: iobase memory address
- * Description: this is the main probe function used to
- * call the alloc_etherdev, allocate the priv structure.
- */
- struct stmmac_priv *stmmac_dvr_probe(struct device *device,
- struct plat_stmmacenet_data *plat_dat,
- void __iomem *addr)
- {
- int ret = 0;
- struct net_device *ndev = NULL;
- struct stmmac_priv *priv;
- ndev = alloc_etherdev(sizeof(struct stmmac_priv));
- if (!ndev)
- return NULL;
- SET_NETDEV_DEV(ndev, device);
- priv = netdev_priv(ndev);
- priv->device = device;
- priv->dev = ndev;
- ether_setup(ndev);
- stmmac_set_ethtool_ops(ndev);
- priv->pause = pause;
- priv->plat = plat_dat;
- priv->ioaddr = addr;
- priv->dev->base_addr = (unsigned long)addr;
- /* 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;
- /* Init MAC and get the capabilities */
- ret = stmmac_hw_init(priv);
- if (ret)
- goto error_free_netdev;
- 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;
- }
- priv->stmmac_clk = clk_get(priv->device, STMMAC_RESOURCE_NAME);
- if (IS_ERR(priv->stmmac_clk)) {
- pr_warn("%s: warning: cannot get CSR clock\n", __func__);
- goto error_clk_get;
- }
- /* 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 priv;
- error_mdio_register:
- clk_put(priv->stmmac_clk);
- error_clk_get:
- unregister_netdev(ndev);
- error_netdev_register:
- netif_napi_del(&priv->napi);
- error_free_netdev:
- free_netdev(ndev);
- return NULL;
- }
- /**
- * 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);
- if (priv->pcs != STMMAC_PCS_RGMII && priv->pcs != STMMAC_PCS_TBI &&
- priv->pcs != STMMAC_PCS_RTBI)
- stmmac_mdio_unregister(ndev);
- netif_carrier_off(ndev);
- unregister_netdev(ndev);
- free_netdev(ndev);
- return 0;
- }
- #ifdef CONFIG_PM
- 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);
- stmmac_clear_descriptors(priv);
- /* Enable Power down mode by programming the PMT regs */
- if (device_may_wakeup(priv->device))
- priv->hw->mac->pmt(priv->ioaddr, priv->wolopts);
- else {
- stmmac_set_mac(priv->ioaddr, false);
- /* Disable clock in case of PWM is off */
- clk_disable_unprepare(priv->stmmac_clk);
- }
- spin_unlock_irqrestore(&priv->lock, flags);
- return 0;
- }
- 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->ioaddr, 0);
- else
- /* enable the clk prevously disabled */
- clk_prepare_enable(priv->stmmac_clk);
- netif_device_attach(ndev);
- /* Enable the MAC and DMA */
- stmmac_set_mac(priv->ioaddr, true);
- priv->hw->dma->start_tx(priv->ioaddr);
- priv->hw->dma->start_rx(priv->ioaddr);
- napi_enable(&priv->napi);
- netif_start_queue(ndev);
- spin_unlock_irqrestore(&priv->lock, flags);
- if (priv->phydev)
- phy_start(priv->phydev);
- return 0;
- }
- int stmmac_freeze(struct net_device *ndev)
- {
- if (!ndev || !netif_running(ndev))
- return 0;
- return stmmac_release(ndev);
- }
- int stmmac_restore(struct net_device *ndev)
- {
- if (!ndev || !netif_running(ndev))
- return 0;
- return stmmac_open(ndev);
- }
- #endif /* CONFIG_PM */
- /* Driver can be configured w/ and w/ both PCI and Platf drivers
- * depending on the configuration selected.
- */
- static int __init stmmac_init(void)
- {
- int ret;
- ret = stmmac_register_platform();
- if (ret)
- goto err;
- ret = stmmac_register_pci();
- if (ret)
- goto err_pci;
- return 0;
- err_pci:
- stmmac_unregister_platform();
- err:
- pr_err("stmmac: driver registration failed\n");
- return ret;
- }
- static void __exit stmmac_exit(void)
- {
- stmmac_unregister_platform();
- stmmac_unregister_pci();
- }
- module_init(stmmac_init);
- module_exit(stmmac_exit);
- #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, "dma_txsize:", 11)) {
- if (kstrtoint(opt + 11, 0, &dma_txsize))
- goto err;
- } else if (!strncmp(opt, "dma_rxsize:", 11)) {
- if (kstrtoint(opt + 11, 0, &dma_rxsize))
- 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 */
- MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet device driver");
- MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
- MODULE_LICENSE("GPL");
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