| /******************************************************************************* |
| 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 |
| #include "stmmac.h" |
| |
| #undef STMMAC_DEBUG |
| /*#define STMMAC_DEBUG*/ |
| #ifdef STMMAC_DEBUG |
| #define DBG(nlevel, klevel, fmt, args...) \ |
| ((void)(netif_msg_##nlevel(priv) && \ |
| printk(KERN_##klevel fmt, ## args))) |
| #else |
| #define DBG(nlevel, klevel, fmt, args...) do { } while (0) |
| #endif |
| |
| #undef STMMAC_RX_DEBUG |
| /*#define STMMAC_RX_DEBUG*/ |
| #ifdef STMMAC_RX_DEBUG |
| #define RX_DBG(fmt, args...) printk(fmt, ## args) |
| #else |
| #define RX_DBG(fmt, args...) do { } while (0) |
| #endif |
| |
| #undef STMMAC_XMIT_DEBUG |
| /*#define STMMAC_XMIT_DEBUG*/ |
| #ifdef STMMAC_TX_DEBUG |
| #define TX_DBG(fmt, args...) printk(fmt, ## args) |
| #else |
| #define TX_DBG(fmt, args...) do { } while (0) |
| #endif |
| |
| #define STMMAC_ALIGN(x) L1_CACHE_ALIGN(x) |
| #define JUMBO_LEN 9000 |
| |
| /* Module parameters */ |
| #define TX_TIMEO 5000 /* default 5 seconds */ |
| static int watchdog = TX_TIMEO; |
| module_param(watchdog, int, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(watchdog, "Transmit timeout in milliseconds"); |
| |
| static int debug = -1; /* -1: default, 0: no output, 16: all */ |
| module_param(debug, int, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(debug, "Message Level (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"); |
| |
| /* Pay attention to tune this parameter; take care of both |
| * hardware capability and network stabitily/performance impact. |
| * Many tests showed that ~4ms latency seems to be good enough. */ |
| #ifdef CONFIG_STMMAC_TIMER |
| #define DEFAULT_PERIODIC_RATE 256 |
| static int tmrate = DEFAULT_PERIODIC_RATE; |
| module_param(tmrate, int, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(tmrate, "External timer freq. (default: 256Hz)"); |
| #endif |
| |
| #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_TIMER(x) (jiffies + msecs_to_jiffies(x)) |
| |
| 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 |
| |
| /** |
| * 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; |
| } |
| |
| 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. */ |
| 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; |
| } /* 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 defined(STMMAC_XMIT_DEBUG) || defined(STMMAC_RX_DEBUG) |
| static void print_pkt(unsigned char *buf, int len) |
| { |
| int j; |
| pr_info("len = %d byte, buf addr: 0x%p", len, buf); |
| for (j = 0; j < len; j++) { |
| if ((j % 16) == 0) |
| pr_info("\n %03x:", j); |
| pr_info(" %02x", buf[j]); |
| } |
| pr_info("\n"); |
| } |
| #endif |
| |
| /* 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; |
| } |
| |
| /* On some ST platforms, 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); |
| } |
| |
| 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); |
| } |
| |
| void stmmac_disable_eee_mode(struct stmmac_priv *priv) |
| { |
| /* Exit and disable EEE in case of we are are in LPI state. */ |
| priv->hw->mac->reset_eee_mode(priv->ioaddr); |
| del_timer_sync(&priv->eee_ctrl_timer); |
| priv->tx_path_in_lpi_mode = false; |
| } |
| |
| /** |
| * stmmac_eee_ctrl_timer |
| * @arg : data hook |
| * Description: |
| * If there is no data transfer and if we are not in LPI state, |
| * then MAC Transmitter can be moved to LPI state. |
| */ |
| static void 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_TIMER(eee_timer)); |
| } |
| |
| /** |
| * stmmac_eee_init |
| * @priv: private device pointer |
| * Description: |
| * If the EEE support has been enabled while configuring the driver, |
| * if the GMAC actually supports the EEE (from the HW cap reg) and the |
| * phy can also manage EEE, so enable the LPI state and start the timer |
| * to verify if the tx path can enter in LPI state. |
| */ |
| bool stmmac_eee_init(struct stmmac_priv *priv) |
| { |
| bool ret = false; |
| |
| /* 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; |
| |
| 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_TIMER(eee_timer); |
| add_timer(&priv->eee_ctrl_timer); |
| |
| priv->hw->mac->set_eee_timer(priv->ioaddr, |
| STMMAC_DEFAULT_LIT_LS_TIMER, |
| priv->tx_lpi_timer); |
| |
| pr_info("stmmac: Energy-Efficient Ethernet initialized\n"); |
| |
| ret = true; |
| } |
| out: |
| return ret; |
| } |
| |
| static void stmmac_eee_adjust(struct stmmac_priv *priv) |
| { |
| /* When the EEE has been already initialised we have to |
| * modify the PLS bit in the LPI ctrl & status reg according |
| * to the PHY link status. For this reason. |
| */ |
| if (priv->eee_enabled) |
| priv->hw->mac->set_eee_pls(priv->ioaddr, priv->phydev->link); |
| } |
| |
| /** |
| * 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; |
| |
| DBG(probe, DEBUG, "stmmac_adjust_link: called. address %d link %d\n", |
| phydev->addr, phydev->link); |
| |
| 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_warning("%s: Speed (%d) is not 10" |
| " or 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); |
| |
| stmmac_eee_adjust(priv); |
| |
| spin_unlock_irqrestore(&priv->lock, flags); |
| |
| DBG(probe, DEBUG, "stmmac_adjust_link: exiting\n"); |
| } |
| |
| /** |
| * 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, 0, |
| 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; |
| } |
| |
| /** |
| * display_ring |
| * @p: pointer to the ring. |
| * @size: size of the ring. |
| * Description: display all the descriptors within the ring. |
| */ |
| static void display_ring(struct dma_desc *p, int size) |
| { |
| struct tmp_s { |
| u64 a; |
| unsigned int b; |
| unsigned int c; |
| }; |
| int i; |
| for (i = 0; i < size; i++) { |
| struct tmp_s *x = (struct tmp_s *)(p + i); |
| pr_info("\t%d [0x%x]: DES0=0x%x DES1=0x%x BUF1=0x%x BUF2=0x%x", |
| i, (unsigned int)virt_to_phys(&p[i]), |
| (unsigned int)(x->a), (unsigned int)((x->a) >> 32), |
| x->b, x->c); |
| pr_info("\n"); |
| } |
| } |
| |
| 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; |
| } |
| |
| /** |
| * 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); |
| struct sk_buff *skb; |
| unsigned int txsize = priv->dma_tx_size; |
| unsigned int rxsize = priv->dma_rx_size; |
| unsigned int bfsize; |
| int dis_ic = 0; |
| int des3_as_data_buf = 0; |
| |
| /* Set the max buffer size according to the DESC mode |
| * and the MTU. Note that RING mode allows 16KiB bsize. */ |
| bfsize = priv->hw->ring->set_16kib_bfsize(dev->mtu); |
| |
| if (bfsize == BUF_SIZE_16KiB) |
| des3_as_data_buf = 1; |
| else |
| bfsize = stmmac_set_bfsize(dev->mtu, priv->dma_buf_sz); |
| |
| #ifdef CONFIG_STMMAC_TIMER |
| /* Disable interrupts on completion for the reception if timer is on */ |
| if (likely(priv->tm->enable)) |
| dis_ic = 1; |
| #endif |
| |
| DBG(probe, INFO, "stmmac: txsize %d, rxsize %d, bfsize %d\n", |
| txsize, rxsize, bfsize); |
| |
| priv->rx_skbuff_dma = kmalloc(rxsize * sizeof(dma_addr_t), GFP_KERNEL); |
| priv->rx_skbuff = |
| kmalloc(sizeof(struct sk_buff *) * rxsize, GFP_KERNEL); |
| priv->dma_rx = |
| (struct dma_desc *)dma_alloc_coherent(priv->device, |
| rxsize * |
| sizeof(struct dma_desc), |
| &priv->dma_rx_phy, |
| GFP_KERNEL); |
| priv->tx_skbuff = kmalloc(sizeof(struct sk_buff *) * txsize, |
| GFP_KERNEL); |
| priv->dma_tx = |
| (struct dma_desc *)dma_alloc_coherent(priv->device, |
| txsize * |
| sizeof(struct dma_desc), |
| &priv->dma_tx_phy, |
| GFP_KERNEL); |
| |
| if ((priv->dma_rx == NULL) || (priv->dma_tx == NULL)) { |
| pr_err("%s:ERROR allocating the DMA Tx/Rx desc\n", __func__); |
| return; |
| } |
| |
| DBG(probe, INFO, "stmmac (%s) DMA desc: virt addr (Rx %p, " |
| "Tx %p)\n\tDMA phy addr (Rx 0x%08x, Tx 0x%08x)\n", |
| dev->name, priv->dma_rx, priv->dma_tx, |
| (unsigned int)priv->dma_rx_phy, (unsigned int)priv->dma_tx_phy); |
| |
| /* RX INITIALIZATION */ |
| DBG(probe, INFO, "stmmac: SKB addresses:\n" |
| "skb\t\tskb data\tdma data\n"); |
| |
| for (i = 0; i < rxsize; i++) { |
| struct dma_desc *p = priv->dma_rx + i; |
| |
| skb = __netdev_alloc_skb(dev, bfsize + NET_IP_ALIGN, |
| GFP_KERNEL); |
| if (unlikely(skb == NULL)) { |
| pr_err("%s: Rx init fails; skb is NULL\n", __func__); |
| break; |
| } |
| skb_reserve(skb, NET_IP_ALIGN); |
| priv->rx_skbuff[i] = skb; |
| priv->rx_skbuff_dma[i] = dma_map_single(priv->device, skb->data, |
| bfsize, DMA_FROM_DEVICE); |
| |
| p->des2 = priv->rx_skbuff_dma[i]; |
| |
| priv->hw->ring->init_desc3(des3_as_data_buf, p); |
| |
| DBG(probe, INFO, "[%p]\t[%p]\t[%x]\n", priv->rx_skbuff[i], |
| priv->rx_skbuff[i]->data, priv->rx_skbuff_dma[i]); |
| } |
| priv->cur_rx = 0; |
| priv->dirty_rx = (unsigned int)(i - rxsize); |
| priv->dma_buf_sz = bfsize; |
| buf_sz = bfsize; |
| |
| /* TX INITIALIZATION */ |
| for (i = 0; i < txsize; i++) { |
| priv->tx_skbuff[i] = NULL; |
| priv->dma_tx[i].des2 = 0; |
| } |
| |
| /* In case of Chained mode this sets the des3 to the next |
| * element in the chain */ |
| priv->hw->ring->init_dma_chain(priv->dma_rx, priv->dma_rx_phy, rxsize); |
| priv->hw->ring->init_dma_chain(priv->dma_tx, priv->dma_tx_phy, txsize); |
| |
| priv->dirty_tx = 0; |
| priv->cur_tx = 0; |
| |
| /* Clear the Rx/Tx descriptors */ |
| priv->hw->desc->init_rx_desc(priv->dma_rx, rxsize, dis_ic); |
| priv->hw->desc->init_tx_desc(priv->dma_tx, txsize); |
| |
| if (netif_msg_hw(priv)) { |
| pr_info("RX descriptor ring:\n"); |
| display_ring(priv->dma_rx, rxsize); |
| pr_info("TX descriptor ring:\n"); |
| display_ring(priv->dma_tx, txsize); |
| } |
| } |
| |
| 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 = priv->dma_tx + i; |
| if (p->des2) |
| dma_unmap_single(priv->device, p->des2, |
| priv->hw->desc->get_tx_len(p), |
| DMA_TO_DEVICE); |
| dev_kfree_skb_any(priv->tx_skbuff[i]); |
| priv->tx_skbuff[i] = NULL; |
| } |
| } |
| } |
| |
| 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 the region of consistent memory previously allocated for |
| * the DMA */ |
| 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); |
| kfree(priv->rx_skbuff_dma); |
| kfree(priv->rx_skbuff); |
| kfree(priv->tx_skbuff); |
| } |
| |
| /** |
| * stmmac_dma_operation_mode - HW DMA operation mode |
| * @priv : pointer to the private device 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: |
| * @priv: private driver structure |
| * Description: it reclaims resources after transmission completes. |
| */ |
| static void stmmac_tx(struct stmmac_priv *priv) |
| { |
| unsigned int txsize = priv->dma_tx_size; |
| |
| spin_lock(&priv->tx_lock); |
| |
| 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 = 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++; |
| } |
| TX_DBG("%s: curr %d, dirty %d\n", __func__, |
| priv->cur_tx, priv->dirty_tx); |
| |
| if (likely(p->des2)) |
| dma_unmap_single(priv->device, p->des2, |
| priv->hw->desc->get_tx_len(p), |
| DMA_TO_DEVICE); |
| priv->hw->ring->clean_desc3(p); |
| |
| if (likely(skb != NULL)) { |
| /* |
| * If there's room in the queue (limit it to size) |
| * we add this skb back into the pool, |
| * if it's the right size. |
| */ |
| if ((skb_queue_len(&priv->rx_recycle) < |
| priv->dma_rx_size) && |
| skb_recycle_check(skb, priv->dma_buf_sz)) |
| __skb_queue_head(&priv->rx_recycle, skb); |
| else |
| dev_kfree_skb(skb); |
| |
| priv->tx_skbuff[entry] = NULL; |
| } |
| |
| priv->hw->desc->release_tx_desc(p); |
| |
| 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)) { |
| TX_DBG("%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_TIMER(eee_timer)); |
| } |
| spin_unlock(&priv->tx_lock); |
| } |
| |
| static inline void stmmac_enable_irq(struct stmmac_priv *priv) |
| { |
| #ifdef CONFIG_STMMAC_TIMER |
| if (likely(priv->tm->enable)) |
| priv->tm->timer_start(tmrate); |
| else |
| #endif |
| priv->hw->dma->enable_dma_irq(priv->ioaddr); |
| } |
| |
| static inline void stmmac_disable_irq(struct stmmac_priv *priv) |
| { |
| #ifdef CONFIG_STMMAC_TIMER |
| if (likely(priv->tm->enable)) |
| priv->tm->timer_stop(); |
| else |
| #endif |
| priv->hw->dma->disable_dma_irq(priv->ioaddr); |
| } |
| |
| static int stmmac_has_work(struct stmmac_priv *priv) |
| { |
| unsigned int has_work = 0; |
| int rxret, tx_work = 0; |
| |
| rxret = priv->hw->desc->get_rx_owner(priv->dma_rx + |
| (priv->cur_rx % priv->dma_rx_size)); |
| |
| if (priv->dirty_tx != priv->cur_tx) |
| tx_work = 1; |
| |
| if (likely(!rxret || tx_work)) |
| has_work = 1; |
| |
| return has_work; |
| } |
| |
| static inline void _stmmac_schedule(struct stmmac_priv *priv) |
| { |
| if (likely(stmmac_has_work(priv))) { |
| stmmac_disable_irq(priv); |
| napi_schedule(&priv->napi); |
| } |
| } |
| |
| #ifdef CONFIG_STMMAC_TIMER |
| void stmmac_schedule(struct net_device *dev) |
| { |
| struct stmmac_priv *priv = netdev_priv(dev); |
| |
| priv->xstats.sched_timer_n++; |
| |
| _stmmac_schedule(priv); |
| } |
| |
| static void stmmac_no_timer_started(unsigned int x) |
| {; |
| }; |
| |
| static void stmmac_no_timer_stopped(void) |
| {; |
| }; |
| #endif |
| |
| /** |
| * stmmac_tx_err: |
| * @priv: pointer to the private device structure |
| * Description: it cleans the descriptors and restarts the transmission |
| * in case of errors. |
| */ |
| static void stmmac_tx_err(struct stmmac_priv *priv) |
| { |
| netif_stop_queue(priv->dev); |
| |
| priv->hw->dma->stop_tx(priv->ioaddr); |
| dma_free_tx_skbufs(priv); |
| priv->hw->desc->init_tx_desc(priv->dma_tx, priv->dma_tx_size); |
| 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); |
| } |
| |
| |
| 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_tx_rx)) |
| _stmmac_schedule(priv); |
| |
| else 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); |
| } |
| |
| 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; |
| |
| /* Mask MMC irq, counters are managed in SW and registers |
| * are cleared on each READ eventually. */ |
| 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; |
| |
| /* Only check valid Synopsys Id because old MAC chips |
| * have no HW registers where get the ID */ |
| 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 |
| * @priv : private structure |
| * Description: select the Enhanced/Alternate or Normal descriptors |
| */ |
| static void stmmac_selec_desc_mode(struct stmmac_priv *priv) |
| { |
| if (priv->plat->enh_desc) { |
| pr_info(" Enhanced/Alternate descriptors\n"); |
| priv->hw->desc = &enh_desc_ops; |
| } else { |
| pr_info(" Normal descriptors\n"); |
| priv->hw->desc = &ndesc_ops; |
| } |
| } |
| |
| /** |
| * stmmac_get_hw_features |
| * @priv : private device pointer |
| * 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_ADDMACADRSEL) >> 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; |
| } |
| |
| static void stmmac_check_ether_addr(struct stmmac_priv *priv) |
| { |
| /* verify if the MAC address is valid, in case of failures it |
| * generates a random MAC address */ |
| 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_warning("%s: device MAC address %pM\n", priv->dev->name, |
| priv->dev->dev_addr); |
| } |
| |
| 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; |
| |
| /* Some DMA parameters can be passed from the platform; |
| * in case of these are not passed we keep a default |
| * (good for all the chips) and init the DMA! */ |
| 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; |
| } |
| |
| return priv->hw->dma->init(priv->ioaddr, pbl, fixed_burst, mixed_burst, |
| burst_len, priv->dma_tx_phy, |
| priv->dma_rx_phy); |
| } |
| |
| /** |
| * 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; |
| |
| #ifdef CONFIG_STMMAC_TIMER |
| priv->tm = kzalloc(sizeof(struct stmmac_timer *), GFP_KERNEL); |
| if (unlikely(priv->tm == NULL)) |
| return -ENOMEM; |
| |
| priv->tm->freq = tmrate; |
| |
| /* Test if the external timer can be actually used. |
| * In case of failure continue without timer. */ |
| if (unlikely((stmmac_open_ext_timer(dev, priv->tm)) < 0)) { |
| pr_warning("stmmaceth: cannot attach the external timer.\n"); |
| priv->tm->freq = 0; |
| priv->tm->timer_start = stmmac_no_timer_started; |
| priv->tm->timer_stop = stmmac_no_timer_stopped; |
| } else |
| priv->tm->enable = 1; |
| #endif |
| clk_enable(priv->stmmac_clk); |
| |
| stmmac_check_ether_addr(priv); |
| |
| ret = stmmac_init_phy(dev); |
| if (unlikely(ret)) { |
| pr_err("%s: Cannot attach to PHY (error: %d)\n", __func__, ret); |
| goto open_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 open_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 open_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 ext WoL IRQ %d " |
| "(error: %d)\n", __func__, priv->wol_irq, ret); |
| goto open_error_wolirq; |
| } |
| } |
| |
| /* 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 open_error_lpiirq; |
| } |
| } |
| |
| /* 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); |
| |
| #ifdef CONFIG_STMMAC_DEBUG_FS |
| ret = stmmac_init_fs(dev); |
| if (ret < 0) |
| pr_warning("%s: failed debugFS registration\n", __func__); |
| #endif |
| /* Start the ball rolling... */ |
| DBG(probe, DEBUG, "%s: DMA RX/TX processes started...\n", dev->name); |
| priv->hw->dma->start_tx(priv->ioaddr); |
| priv->hw->dma->start_rx(priv->ioaddr); |
| |
| #ifdef CONFIG_STMMAC_TIMER |
| priv->tm->timer_start(tmrate); |
| #endif |
| |
| /* 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_TIMER; |
| priv->eee_enabled = stmmac_eee_init(priv); |
| |
| napi_enable(&priv->napi); |
| skb_queue_head_init(&priv->rx_recycle); |
| netif_start_queue(dev); |
| |
| return 0; |
| |
| open_error_lpiirq: |
| if (priv->wol_irq != dev->irq) |
| free_irq(priv->wol_irq, dev); |
| |
| open_error_wolirq: |
| free_irq(dev->irq, dev); |
| |
| open_error: |
| #ifdef CONFIG_STMMAC_TIMER |
| kfree(priv->tm); |
| #endif |
| if (priv->phydev) |
| phy_disconnect(priv->phydev); |
| |
| clk_disable(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); |
| |
| #ifdef CONFIG_STMMAC_TIMER |
| /* Stop and release the timer */ |
| stmmac_close_ext_timer(); |
| if (priv->tm != NULL) |
| kfree(priv->tm); |
| #endif |
| napi_disable(&priv->napi); |
| skb_queue_purge(&priv->rx_recycle); |
| |
| /* 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(priv->stmmac_clk); |
| |
| return 0; |
| } |
| |
| /** |
| * stmmac_xmit: |
| * @skb : the socket buffer |
| * @dev : device pointer |
| * Description : Tx entry point of the driver. |
| */ |
| 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; |
| 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: BUG! 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; |
| |
| #ifdef STMMAC_XMIT_DEBUG |
| if ((skb->len > ETH_FRAME_LEN) || nfrags) |
| pr_info("stmmac xmit:\n" |
| "\tskb addr %p - len: %d - nopaged_len: %d\n" |
| "\tn_frags: %d - ip_summed: %d - %s gso\n", |
| skb, skb->len, nopaged_len, nfrags, skb->ip_summed, |
| !skb_is_gso(skb) ? "isn't" : "is"); |
| #endif |
| |
| csum_insertion = (skb->ip_summed == CHECKSUM_PARTIAL); |
| |
| desc = priv->dma_tx + entry; |
| first = desc; |
| |
| #ifdef STMMAC_XMIT_DEBUG |
| if ((nfrags > 0) || (skb->len > ETH_FRAME_LEN)) |
| pr_debug("stmmac xmit: skb len: %d, nopaged_len: %d,\n" |
| "\t\tn_frags: %d, ip_summed: %d\n", |
| skb->len, nopaged_len, nfrags, skb->ip_summed); |
| #endif |
| priv->tx_skbuff[entry] = skb; |
| |
| if (priv->hw->ring->is_jumbo_frm(skb->len, priv->plat->enh_desc)) { |
| entry = priv->hw->ring->jumbo_frm(priv, skb, csum_insertion); |
| desc = priv->dma_tx + entry; |
| } else { |
| desc->des2 = dma_map_single(priv->device, skb->data, |
| nopaged_len, DMA_TO_DEVICE); |
| priv->hw->desc->prepare_tx_desc(desc, 1, nopaged_len, |
| csum_insertion); |
| } |
| |
| 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; |
| desc = priv->dma_tx + entry; |
| |
| TX_DBG("\t[entry %d] segment len: %d\n", entry, len); |
| desc->des2 = skb_frag_dma_map(priv->device, frag, 0, len, |
| DMA_TO_DEVICE); |
| priv->tx_skbuff[entry] = NULL; |
| priv->hw->desc->prepare_tx_desc(desc, 0, len, csum_insertion); |
| wmb(); |
| priv->hw->desc->set_tx_owner(desc); |
| wmb(); |
| } |
| |
| /* Interrupt on completition only for the latest segment */ |
| priv->hw->desc->close_tx_desc(desc); |
| |
| #ifdef CONFIG_STMMAC_TIMER |
| /* Clean IC while using timer */ |
| if (likely(priv->tm->enable)) |
| priv->hw->desc->clear_tx_ic(desc); |
| #endif |
| |
| wmb(); |
| |
| /* To avoid raise condition */ |
| priv->hw->desc->set_tx_owner(first); |
| wmb(); |
| |
| priv->cur_tx++; |
| |
| #ifdef STMMAC_XMIT_DEBUG |
| if (netif_msg_pktdata(priv)) { |
| pr_info("stmmac xmit: current=%d, dirty=%d, entry=%d, " |
| "first=%p, nfrags=%d\n", |
| (priv->cur_tx % txsize), (priv->dirty_tx % txsize), |
| entry, first, nfrags); |
| display_ring(priv->dma_tx, txsize); |
| pr_info(">>> frame to be transmitted: "); |
| print_pkt(skb->data, skb->len); |
| } |
| #endif |
| if (unlikely(stmmac_tx_avail(priv) <= (MAX_SKB_FRAGS + 1))) { |
| TX_DBG("%s: stop transmitted packets\n", __func__); |
| netif_stop_queue(dev); |
| } |
| |
| dev->stats.tx_bytes += skb->len; |
| |
| skb_tx_timestamp(skb); |
| |
| priv->hw->dma->enable_dma_transmission(priv->ioaddr); |
| |
| spin_unlock(&priv->tx_lock); |
| |
| return NETDEV_TX_OK; |
| } |
| |
| static inline void stmmac_rx_refill(struct stmmac_priv *priv) |
| { |
| unsigned int rxsize = priv->dma_rx_size; |
| int bfsize = priv->dma_buf_sz; |
| struct dma_desc *p = priv->dma_rx; |
| |
| for (; priv->cur_rx - priv->dirty_rx > 0; priv->dirty_rx++) { |
| unsigned int entry = priv->dirty_rx % rxsize; |
| if (likely(priv->rx_skbuff[entry] == NULL)) { |
| struct sk_buff *skb; |
| |
| skb = __skb_dequeue(&priv->rx_recycle); |
| if (skb == NULL) |
| 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 + entry)->des2 = priv->rx_skbuff_dma[entry]; |
| |
| if (unlikely(priv->plat->has_gmac)) |
| priv->hw->ring->refill_desc3(bfsize, p + entry); |
| |
| RX_DBG(KERN_INFO "\trefill entry #%d\n", entry); |
| } |
| wmb(); |
| priv->hw->desc->set_rx_owner(p + entry); |
| wmb(); |
| } |
| } |
| |
| 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; |
| struct dma_desc *p = priv->dma_rx + entry; |
| struct dma_desc *p_next; |
| |
| #ifdef STMMAC_RX_DEBUG |
| if (netif_msg_hw(priv)) { |
| pr_debug(">>> stmmac_rx: descriptor ring:\n"); |
| display_ring(priv->dma_rx, rxsize); |
| } |
| #endif |
| while (!priv->hw->desc->get_rx_owner(p)) { |
| int status; |
| |
| if (count >= limit) |
| break; |
| |
| count++; |
| |
| next_entry = (++priv->cur_rx) % rxsize; |
| p_next = priv->dma_rx + next_entry; |
| prefetch(p_next); |
| |
| /* read the status of the incoming frame */ |
| status = (priv->hw->desc->rx_status(&priv->dev->stats, |
| &priv->xstats, p)); |
| if (unlikely(status == discard_frame)) |
| priv->dev->stats.rx_errors++; |
| else { |
| struct sk_buff *skb; |
| int frame_len; |
| |
| frame_len = priv->hw->desc->get_rx_frame_len(p, |
| priv->plat->rx_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; |
| #ifdef STMMAC_RX_DEBUG |
| if (frame_len > ETH_FRAME_LEN) |
| pr_debug("\tRX frame size %d, COE status: %d\n", |
| frame_len, status); |
| |
| if (netif_msg_hw(priv)) |
| pr_debug("\tdesc: %p [entry %d] buff=0x%x\n", |
| p, entry, p->des2); |
| #endif |
| 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; |
| |
| skb_put(skb, frame_len); |
| dma_unmap_single(priv->device, |
| priv->rx_skbuff_dma[entry], |
| priv->dma_buf_sz, DMA_FROM_DEVICE); |
| #ifdef STMMAC_RX_DEBUG |
| if (netif_msg_pktdata(priv)) { |
| pr_info(" frame received (%dbytes)", frame_len); |
| print_pkt(skb->data, frame_len); |
| } |
| #endif |
| skb->protocol = eth_type_trans(skb, priv->dev); |
| |
| if (unlikely(!priv->plat->rx_coe)) { |
| /* No RX COE for old mac10/100 devices */ |
| skb_checksum_none_assert(skb); |
| netif_receive_skb(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; |
| p = p_next; /* use prefetched values */ |
| } |
| |
| 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 : |
| * This function implements the the reception process. |
| * Also it runs the TX completion thread |
| */ |
| 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.poll_n++; |
| stmmac_tx(priv); |
| work_done = stmmac_rx(priv, budget); |
| |
| if (work_done < budget) { |
| napi_complete(napi); |
| stmmac_enable_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 tmrate. 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_warning("%s: can't change I/O address\n", dev->name); |
| return -EOPNOTSUPP; |
| } |
| |
| /* Don't allow changing the IRQ */ |
| if (map->irq != dev->irq) { |
| pr_warning("%s: can't change IRQ number %d\n", |
| dev->name, dev->irq); |
| return -EOPNOTSUPP; |
| } |
| |
| /* ignore other fields */ |
| 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; |
| } |
| |
| 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); |
| if (unlikely(status)) { |
| if (status & core_mmc_tx_irq) |
| priv->xstats.mmc_tx_irq_n++; |
| if (status & core_mmc_rx_irq) |
| priv->xstats.mmc_rx_irq_n++; |
| if (status & core_mmc_rx_csum_offload_irq) |
| priv->xstats.mmc_rx_csum_offload_irq_n++; |
| if (status & core_irq_receive_pmt_irq) |
| priv->xstats.irq_receive_pmt_irq_n++; |
| |
| /* For LPI we need to save the tx status */ |
| if (status & core_irq_tx_path_in_lpi_mode) { |
| priv->xstats.irq_tx_path_in_lpi_mode_n++; |
| priv->tx_path_in_lpi_mode = true; |
| } |
| if (status & core_irq_tx_path_exit_lpi_mode) { |
| priv->xstats.irq_tx_path_exit_lpi_mode_n++; |
| priv->tx_path_in_lpi_mode = false; |
| } |
| if (status & core_irq_rx_path_in_lpi_mode) |
| priv->xstats.irq_rx_path_in_lpi_mode_n++; |
| if (status & core_irq_rx_path_exit_lpi_mode) |
| priv->xstats.irq_rx_path_exit_lpi_mode_n++; |
| } |
| } |
| |
| /* 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 there are no special functionality supported in IOCTL, just the |
| * phy_mii_ioctl(...) can be invoked. |
| */ |
| static int stmmac_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) |
| { |
| struct stmmac_priv *priv = netdev_priv(dev); |
| int ret; |
| |
| if (!netif_running(dev)) |
| return -EINVAL; |
| |
| if (!priv->phydev) |
| return -EINVAL; |
| |
| ret = phy_mii_ioctl(priv->phydev, rq, cmd); |
| |
| 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 int stmmac_sysfs_ring_read(struct seq_file *seq, void *v) |
| { |
| struct tmp_s { |
| u64 a; |
| unsigned int b; |
| unsigned int c; |
| }; |
| int i; |
| struct net_device *dev = seq->private; |
| struct stmmac_priv *priv = netdev_priv(dev); |
| |
| seq_printf(seq, "=======================\n"); |
| seq_printf(seq, " RX descriptor ring\n"); |
| seq_printf(seq, "=======================\n"); |
| |
| for (i = 0; i < priv->dma_rx_size; i++) { |
| struct tmp_s *x = (struct tmp_s *)(priv->dma_rx + i); |
| seq_printf(seq, "[%d] DES0=0x%x DES1=0x%x BUF1=0x%x BUF2=0x%x", |
| i, (unsigned int)(x->a), |
| (unsigned int)((x->a) >> 32), x->b, x->c); |
| seq_printf(seq, "\n"); |
| } |
| |
| seq_printf(seq, "\n"); |
| seq_printf(seq, "=======================\n"); |
| seq_printf(seq, " TX descriptor ring\n"); |
| seq_printf(seq, "=======================\n"); |
| |
| for (i = 0; i < priv->dma_tx_size; i++) { |
| struct tmp_s *x = (struct tmp_s *)(priv->dma_tx + i); |
| seq_printf(seq, "[%d] DES0=0x%x DES1=0x%x BUF1=0x%x BUF2=0x%x", |
| i, (unsigned int)(x->a), |
| (unsigned int)((x->a) >> 32), x->b, x->c); |
| seq_printf(seq, "\n"); |
| } |
| |
| 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 : pointer to the private device 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 = 0; |
| 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; |
| |
| /* To use the chained or ring mode */ |
| priv->hw->ring = &ring_mode_ops; |
| |
| /* Get and dump the chip ID */ |
| priv->synopsys_id = stmmac_get_synopsys_id(priv); |
| |
| /* 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"); |
| |
| /* Select the enhnaced/normal descriptor structures */ |
| stmmac_selec_desc_mode(priv); |
| |
| /* Enable the IPC (Checksum Offload) and check if the feature has been |
| * enabled during the core configuration. */ |
| ret = priv->hw->mac->rx_ipc(priv->ioaddr); |
| if (!ret) { |
| pr_warning(" 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 ret; |
| } |
| |
| /** |
| * 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 */ |
| stmmac_hw_init(priv); |
| |
| 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_RX; |
| #endif |
| priv->msg_enable = netif_msg_init(debug, default_msg_level); |
| |
| if (flow_ctrl) |
| priv->flow_ctrl = FLOW_AUTO; /* RX/TX pause on */ |
| |
| 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_warning("%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; |
| |
| /* 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); |
| 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); |
| 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); |
| int dis_ic = 0; |
| 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); |
| |
| #ifdef CONFIG_STMMAC_TIMER |
| priv->tm->timer_stop(); |
| if (likely(priv->tm->enable)) |
| dis_ic = 1; |
| #endif |
| napi_disable(&priv->napi); |
| |
| /* Stop TX/RX DMA */ |
| priv->hw->dma->stop_tx(priv->ioaddr); |
| priv->hw->dma->stop_rx(priv->ioaddr); |
| /* Clear the Rx/Tx descriptors */ |
| priv->hw->desc->init_rx_desc(priv->dma_rx, priv->dma_rx_size, |
| dis_ic); |
| priv->hw->desc->init_tx_desc(priv->dma_tx, priv->dma_tx_size); |
| |
| /* 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(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_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); |
| |
| #ifdef CONFIG_STMMAC_TIMER |
| if (likely(priv->tm->enable)) |
| priv->tm->timer_start(tmrate); |
| #endif |
| 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 err_plt = 0; |
| int err_pci = 0; |
| |
| err_plt = stmmac_register_platform(); |
| err_pci = stmmac_register_pci(); |
| |
| if ((err_pci) && (err_plt)) { |
| pr_err("stmmac: driver registration failed\n"); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| 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:", 6)) { |
| if (kstrtoint(opt + 10, 0, &eee_timer)) |
| goto err; |
| #ifdef CONFIG_STMMAC_TIMER |
| } else if (!strncmp(opt, "tmrate:", 7)) { |
| if (kstrtoint(opt + 7, 0, &tmrate)) |
| goto err; |
| #endif |
| } |
| } |
| return 0; |
| |
| err: |
| pr_err("%s: ERROR broken module parameter conversion", __func__); |
| return -EINVAL; |
| } |
| |
| __setup("stmmaceth=", stmmac_cmdline_opt); |
| #endif |
| |
| MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet device driver"); |
| MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>"); |
| MODULE_LICENSE("GPL"); |