diff options
Diffstat (limited to 'drivers/net/stmmac/stmmac_main.c')
| -rw-r--r-- | drivers/net/stmmac/stmmac_main.c | 1895 |
1 files changed, 0 insertions, 1895 deletions
diff --git a/drivers/net/stmmac/stmmac_main.c b/drivers/net/stmmac/stmmac_main.c deleted file mode 100644 index c6e567e..0000000 --- a/drivers/net/stmmac/stmmac_main.c +++ /dev/null @@ -1,1895 +0,0 @@ -/******************************************************************************* - 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) 2007-2009 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/module.h> -#include <linux/init.h> -#include <linux/kernel.h> -#include <linux/interrupt.h> -#include <linux/etherdevice.h> -#include <linux/platform_device.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/phy.h> -#include <linux/if_vlan.h> -#include <linux/dma-mapping.h> -#include <linux/slab.h> -#include <linux/prefetch.h> -#include "stmmac.h" - -#define STMMAC_RESOURCE_NAME "stmmaceth" - -#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)"); - -static 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); - -static irqreturn_t stmmac_interrupt(int irq, void *dev_id); - -/** - * 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 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); -} - -/** - * 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); - - 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[MII_BUS_ID_SIZE + 3]; - char bus_id[MII_BUS_ID_SIZE]; - - priv->oldlink = 0; - priv->speed = 0; - priv->oldduplex = -1; - - snprintf(bus_id, MII_BUS_ID_SIZE, "%x", priv->plat->bus_id); - snprintf(phy_id, 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); - - phydev = phy_connect(dev, phy_id, &stmmac_adjust_link, 0, - priv->plat->interface); - - if (IS_ERR(phydev)) { - pr_err("%s: Could not attach to PHY\n", dev->name); - return PTR_ERR(phydev); - } - - /* - * 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; -} - -static inline void stmmac_enable_mac(void __iomem *ioaddr) -{ - u32 value = readl(ioaddr + MAC_CTRL_REG); - - value |= MAC_RNABLE_RX | MAC_ENABLE_TX; - writel(value, ioaddr + MAC_CTRL_REG); -} - -static inline void stmmac_disable_mac(void __iomem *ioaddr) -{ - u32 value = readl(ioaddr + MAC_CTRL_REG); - - value &= ~(MAC_ENABLE_TX | MAC_RNABLE_RX); - writel(value, ioaddr + MAC_CTRL_REG); -} - -/** - * 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"); - } -} - -/** - * 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. - */ -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 = priv->dma_buf_sz; - int buff2_needed = 0, dis_ic = 0; - - /* Set the Buffer size according to the MTU; - * indeed, in case of jumbo we need to bump-up the buffer sizes. - */ - if (unlikely(dev->mtu >= BUF_SIZE_8KiB)) - bfsize = BUF_SIZE_16KiB; - else if (unlikely(dev->mtu >= BUF_SIZE_4KiB)) - bfsize = BUF_SIZE_8KiB; - else if (unlikely(dev->mtu >= BUF_SIZE_2KiB)) - bfsize = BUF_SIZE_4KiB; - else if (unlikely(dev->mtu >= DMA_BUFFER_SIZE)) - bfsize = BUF_SIZE_2KiB; - else - bfsize = DMA_BUFFER_SIZE; - -#ifdef CONFIG_STMMAC_TIMER - /* Disable interrupts on completion for the reception if timer is on */ - if (likely(priv->tm->enable)) - dis_ic = 1; -#endif - /* If the MTU exceeds 8k so use the second buffer in the chain */ - if (bfsize >= BUF_SIZE_8KiB) - buff2_needed = 1; - - 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 rings: 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_ip_align(dev, bfsize); - if (unlikely(skb == NULL)) { - pr_err("%s: Rx init fails; skb is NULL\n", __func__); - break; - } - 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]; - if (unlikely(buff2_needed)) - p->des3 = p->des2 + BUF_SIZE_8KiB; - 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; - } - 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; - - 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); - if (unlikely(p->des3)) - p->des3 = 0; - - 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); - - entry = (++priv->dirty_tx) % txsize; - } - 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); - } -} - -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); -} - -/** - * 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; - - /* Check that the MAC address is valid. If its not, refuse - * to bring the device up. The user must specify an - * address using the following linux command: - * ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx */ - if (!is_valid_ether_addr(dev->dev_addr)) { - random_ether_addr(dev->dev_addr); - pr_warning("%s: generated random MAC address %pM\n", dev->name, - dev->dev_addr); - } - - stmmac_verify_args(); - -#ifdef CONFIG_STMMAC_TIMER - priv->tm = kzalloc(sizeof(struct stmmac_timer *), GFP_KERNEL); - if (unlikely(priv->tm == NULL)) { - pr_err("%s: ERROR: timer memory alloc failed\n", __func__); - 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 - 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 = priv->hw->dma->init(priv->ioaddr, priv->plat->pbl, - priv->dma_tx_phy, priv->dma_rx_phy); - 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); - - priv->rx_coe = priv->hw->mac->rx_coe(priv->ioaddr); - if (priv->rx_coe) - pr_info("stmmac: Rx Checksum Offload Engine supported\n"); - if (priv->plat->tx_coe) - pr_info("\tTX Checksum insertion supported\n"); - netdev_update_features(dev); - - /* Initialise the MMC (if present) to disable all interrupts. */ - writel(0xffffffff, priv->ioaddr + MMC_HIGH_INTR_MASK); - writel(0xffffffff, priv->ioaddr + MMC_LOW_INTR_MASK); - - /* 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; - } - - /* Enable the MAC Rx/Tx */ - stmmac_enable_mac(priv->ioaddr); - - /* 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; - - /* 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); - - napi_enable(&priv->napi); - skb_queue_head_init(&priv->rx_recycle); - netif_start_queue(dev); - - return 0; - -open_error: -#ifdef CONFIG_STMMAC_TIMER - kfree(priv->tm); -#endif - if (priv->phydev) - phy_disconnect(priv->phydev); - - return ret; -} - -/** - * stmmac_release - close entry point of the driver - * @dev : device pointer. - * Description: - * This is the stop entry point of the driver. - */ -static int stmmac_release(struct net_device *dev) -{ - struct stmmac_priv *priv = netdev_priv(dev); - - /* 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); - - /* 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_disable_mac(priv->ioaddr); - - netif_carrier_off(dev); - - return 0; -} - -static unsigned int stmmac_handle_jumbo_frames(struct sk_buff *skb, - struct net_device *dev, - int csum_insertion) -{ - struct stmmac_priv *priv = netdev_priv(dev); - unsigned int nopaged_len = skb_headlen(skb); - unsigned int txsize = priv->dma_tx_size; - unsigned int entry = priv->cur_tx % txsize; - struct dma_desc *desc = priv->dma_tx + entry; - - if (nopaged_len > BUF_SIZE_8KiB) { - - int buf2_size = nopaged_len - BUF_SIZE_8KiB; - - desc->des2 = dma_map_single(priv->device, skb->data, - BUF_SIZE_8KiB, DMA_TO_DEVICE); - desc->des3 = desc->des2 + BUF_SIZE_4KiB; - priv->hw->desc->prepare_tx_desc(desc, 1, BUF_SIZE_8KiB, - csum_insertion); - - entry = (++priv->cur_tx) % txsize; - desc = priv->dma_tx + entry; - - desc->des2 = dma_map_single(priv->device, - skb->data + BUF_SIZE_8KiB, - buf2_size, DMA_TO_DEVICE); - desc->des3 = desc->des2 + BUF_SIZE_4KiB; - priv->hw->desc->prepare_tx_desc(desc, 0, buf2_size, - csum_insertion); - priv->hw->desc->set_tx_owner(desc); - priv->tx_skbuff[entry] = NULL; - } else { - desc->des2 = dma_map_single(priv->device, skb->data, - nopaged_len, DMA_TO_DEVICE); - desc->des3 = desc->des2 + BUF_SIZE_4KiB; - priv->hw->desc->prepare_tx_desc(desc, 1, nopaged_len, - csum_insertion); - } - return entry; -} - -/** - * 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; - - 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; - } - - 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, skb_headlen(skb), 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, skb_headlen(skb), nfrags, skb->ip_summed); -#endif - priv->tx_skbuff[entry] = skb; - if (unlikely(skb->len >= BUF_SIZE_4KiB)) { - entry = stmmac_handle_jumbo_frames(skb, dev, csum_insertion); - desc = priv->dma_tx + entry; - } else { - unsigned int nopaged_len = skb_headlen(skb); - 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++) { - skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; - int len = frag->size; - - entry = (++priv->cur_tx) % txsize; - desc = priv->dma_tx + entry; - - TX_DBG("\t[entry %d] segment len: %d\n", entry, len); - desc->des2 = dma_map_page(priv->device, frag->page, - frag->page_offset, - 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); - } - - /* 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); - - 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); - - 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)) { - if (bfsize >= BUF_SIZE_8KiB) - (p + entry)->des3 = - (p + entry)->des2 + BUF_SIZE_8KiB; - } - RX_DBG(KERN_INFO "\trefill entry #%d\n", entry); - } - wmb(); - priv->hw->desc->set_rx_owner(p + entry); - } -} - -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 - count = 0; - 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); - /* 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(status == csum_none)) { - /* always for the old mac 10/100 */ - 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_multicast_list - 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_multicast_list(struct net_device *dev) -{ - struct stmmac_priv *priv = netdev_priv(dev); - - spin_lock(&priv->lock); - priv->hw->mac->set_filter(dev); - 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->has_gmac) - max_mtu = JUMBO_LEN; - else - max_mtu = ETH_DATA_LEN; - - 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 u32 stmmac_fix_features(struct net_device *dev, u32 features) -{ - struct stmmac_priv *priv = netdev_priv(dev); - - if (!priv->rx_coe) - features &= ~NETIF_F_RXCSUM; - 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; - } - - if (priv->plat->has_gmac) - /* To handle GMAC own interrupts */ - priv->hw->mac->host_irq_status((void __iomem *) dev->base_addr); - - 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; - - spin_lock(&priv->lock); - ret = phy_mii_ioctl(priv->phydev, rq, cmd); - spin_unlock(&priv->lock); - - return ret; -} - -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_multicast_list = stmmac_multicast_list, - .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_probe - Initialization of the adapter . - * @dev : device pointer - * Description: The function initializes the network device structure for - * the STMMAC driver. It also calls the low level routines - * in order to init the HW (i.e. the DMA engine) - */ -static int stmmac_probe(struct net_device *dev) -{ - int ret = 0; - struct stmmac_priv *priv = netdev_priv(dev); - - ether_setup(dev); - - dev->netdev_ops = &stmmac_netdev_ops; - stmmac_set_ethtool_ops(dev); - - dev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; - dev->features |= dev->hw_features | NETIF_F_HIGHDMA; - dev->watchdog_timeo = msecs_to_jiffies(watchdog); -#ifdef STMMAC_VLAN_TAG_USED - /* Both mac100 and gmac support receive VLAN tag detection */ - dev->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 */ - - priv->pause = pause; - netif_napi_add(dev, &priv->napi, stmmac_poll, 64); - - /* Get the MAC address */ - priv->hw->mac->get_umac_addr((void __iomem *) dev->base_addr, - dev->dev_addr, 0); - - if (!is_valid_ether_addr(dev->dev_addr)) - pr_warning("\tno valid MAC address;" - "please, use ifconfig or nwhwconfig!\n"); - - spin_lock_init(&priv->lock); - - ret = register_netdev(dev); - if (ret) { - pr_err("%s: ERROR %i registering the device\n", - __func__, ret); - return -ENODEV; - } - - DBG(probe, DEBUG, "%s: Scatter/Gather: %s - HW checksums: %s\n", - dev->name, (dev->features & NETIF_F_SG) ? "on" : "off", - (dev->features & NETIF_F_IP_CSUM) ? "on" : "off"); - - return ret; -} - -/** - * stmmac_mac_device_setup - * @dev : device pointer - * Description: select and initialise the mac device (mac100 or Gmac). - */ -static int stmmac_mac_device_setup(struct net_device *dev) -{ - struct stmmac_priv *priv = netdev_priv(dev); - - struct mac_device_info *device; - - if (priv->plat->has_gmac) - device = dwmac1000_setup(priv->ioaddr); - else - device = dwmac100_setup(priv->ioaddr); - - if (!device) - return -ENOMEM; - - if (priv->plat->enh_desc) { - device->desc = &enh_desc_ops; - pr_info("\tEnhanced descriptor structure\n"); - } else - device->desc = &ndesc_ops; - - priv->hw = device; - - if (device_can_wakeup(priv->device)) { - priv->wolopts = WAKE_MAGIC; /* Magic Frame as default */ - enable_irq_wake(dev->irq); - } - - return 0; -} - -/** - * stmmac_dvr_probe - * @pdev: platform device pointer - * Description: the driver is initialized through platform_device. - */ -static int stmmac_dvr_probe(struct platform_device *pdev) -{ - int ret = 0; - struct resource *res; - void __iomem *addr = NULL; - struct net_device *ndev = NULL; - struct stmmac_priv *priv = NULL; - struct plat_stmmacenet_data *plat_dat; - - pr_info("STMMAC driver:\n\tplatform registration... "); - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) - return -ENODEV; - pr_info("\tdone!\n"); - - if (!request_mem_region(res->start, resource_size(res), - pdev->name)) { - pr_err("%s: ERROR: memory allocation failed" - "cannot get the I/O addr 0x%x\n", - __func__, (unsigned int)res->start); - return -EBUSY; - } - - addr = ioremap(res->start, resource_size(res)); - if (!addr) { - pr_err("%s: ERROR: memory mapping failed\n", __func__); - ret = -ENOMEM; - goto out_release_region; - } - - ndev = alloc_etherdev(sizeof(struct stmmac_priv)); - if (!ndev) { - pr_err("%s: ERROR: allocating the device\n", __func__); - ret = -ENOMEM; - goto out_unmap; - } - - SET_NETDEV_DEV(ndev, &pdev->dev); - - /* Get the MAC information */ - ndev->irq = platform_get_irq_byname(pdev, "macirq"); - if (ndev->irq == -ENXIO) { - pr_err("%s: ERROR: MAC IRQ configuration " - "information not found\n", __func__); - ret = -ENXIO; - goto out_free_ndev; - } - - priv = netdev_priv(ndev); - priv->device = &(pdev->dev); - priv->dev = ndev; - plat_dat = pdev->dev.platform_data; - - priv->plat = plat_dat; - - priv->ioaddr = addr; - - /* PMT module is not integrated in all the MAC devices. */ - if (plat_dat->pmt) { - pr_info("\tPMT module supported\n"); - device_set_wakeup_capable(&pdev->dev, 1); - } - - platform_set_drvdata(pdev, ndev); - - /* Set the I/O base addr */ - ndev->base_addr = (unsigned long)addr; - - /* Custom initialisation */ - if (priv->plat->init) { - ret = priv->plat->init(pdev); - if (unlikely(ret)) - goto out_free_ndev; - } - - /* MAC HW revice detection */ - ret = stmmac_mac_device_setup(ndev); - if (ret < 0) - goto out_plat_exit; - - /* Network Device Registration */ - ret = stmmac_probe(ndev); - if (ret < 0) - goto out_plat_exit; - - /* 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; - - pr_info("\t%s - (dev. name: %s - id: %d, IRQ #%d\n" - "\tIO base addr: 0x%p)\n", ndev->name, pdev->name, - pdev->id, ndev->irq, addr); - - /* MDIO bus Registration */ - pr_debug("\tMDIO bus (id: %d)...", priv->plat->bus_id); - ret = stmmac_mdio_register(ndev); - if (ret < 0) - goto out_unregister; - pr_debug("registered!\n"); - return 0; - -out_unregister: - unregister_netdev(ndev); -out_plat_exit: - if (priv->plat->exit) - priv->plat->exit(pdev); -out_free_ndev: - free_netdev(ndev); - platform_set_drvdata(pdev, NULL); -out_unmap: - iounmap(addr); -out_release_region: - release_mem_region(res->start, resource_size(res)); - - return ret; -} - -/** - * stmmac_dvr_remove - * @pdev: platform device pointer - * Description: this function resets the TX/RX processes, disables the MAC RX/TX - * changes the link status, releases the DMA descriptor rings, - * unregisters the MDIO bus and unmaps the allocated memory. - */ -static int stmmac_dvr_remove(struct platform_device *pdev) -{ - struct net_device *ndev = platform_get_drvdata(pdev); - struct stmmac_priv *priv = netdev_priv(ndev); - struct resource *res; - - pr_info("%s:\n\tremoving driver", __func__); - - priv->hw->dma->stop_rx(priv->ioaddr); - priv->hw->dma->stop_tx(priv->ioaddr); - - stmmac_disable_mac(priv->ioaddr); - - netif_carrier_off(ndev); - - stmmac_mdio_unregister(ndev); - - if (priv->plat->exit) - priv->plat->exit(pdev); - - platform_set_drvdata(pdev, NULL); - unregister_netdev(ndev); - - iounmap((void *)priv->ioaddr); - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - release_mem_region(res->start, resource_size(res)); - - free_netdev(ndev); - - return 0; -} - -#ifdef CONFIG_PM -static int stmmac_suspend(struct device *dev) -{ - struct net_device *ndev = dev_get_drvdata(dev); - struct stmmac_priv *priv = netdev_priv(ndev); - int dis_ic = 0; - - if (!ndev || !netif_running(ndev)) - return 0; - - spin_lock(&priv->lock); - - netif_device_detach(ndev); - netif_stop_queue(ndev); - if (priv->phydev) - phy_stop(priv->phydev); - -#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_disable_mac(priv->ioaddr); - - spin_unlock(&priv->lock); - return 0; -} - -static int stmmac_resume(struct device *dev) -{ - struct net_device *ndev = dev_get_drvdata(dev); - struct stmmac_priv *priv = netdev_priv(ndev); - - if (!netif_running(ndev)) - return 0; - - spin_lock(&priv->lock); - - /* 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); - - netif_device_attach(ndev); - - /* Enable the MAC and DMA */ - stmmac_enable_mac(priv->ioaddr); - 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); - - if (priv->phydev) - phy_start(priv->phydev); - - netif_start_queue(ndev); - - spin_unlock(&priv->lock); - return 0; -} - -static int stmmac_freeze(struct device *dev) -{ - struct net_device *ndev = dev_get_drvdata(dev); - - if (!ndev || !netif_running(ndev)) - return 0; - - return stmmac_release(ndev); -} - -static int stmmac_restore(struct device *dev) -{ - struct net_device *ndev = dev_get_drvdata(dev); - - if (!ndev || !netif_running(ndev)) - return 0; - - return stmmac_open(ndev); -} - -static const struct dev_pm_ops stmmac_pm_ops = { - .suspend = stmmac_suspend, - .resume = stmmac_resume, - .freeze = stmmac_freeze, - .thaw = stmmac_restore, - .restore = stmmac_restore, -}; -#else -static const struct dev_pm_ops stmmac_pm_ops; -#endif /* CONFIG_PM */ - -static struct platform_driver stmmac_driver = { - .probe = stmmac_dvr_probe, - .remove = stmmac_dvr_remove, - .driver = { - .name = STMMAC_RESOURCE_NAME, - .owner = THIS_MODULE, - .pm = &stmmac_pm_ops, - }, -}; - -/** - * stmmac_init_module - Entry point for the driver - * Description: This function is the entry point for the driver. - */ -static int __init stmmac_init_module(void) -{ - int ret; - - ret = platform_driver_register(&stmmac_driver); - return ret; -} - -/** - * stmmac_cleanup_module - Cleanup routine for the driver - * Description: This function is the cleanup routine for the driver. - */ -static void __exit stmmac_cleanup_module(void) -{ - platform_driver_unregister(&stmmac_driver); -} - -#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 (strict_strtoul(opt + 6, 0, (unsigned long *)&debug)) - goto err; - } else if (!strncmp(opt, "phyaddr:", 8)) { - if (strict_strtoul(opt + 8, 0, - (unsigned long *)&phyaddr)) - goto err; - } else if (!strncmp(opt, "dma_txsize:", 11)) { - if (strict_strtoul(opt + 11, 0, - (unsigned long *)&dma_txsize)) - goto err; - } else if (!strncmp(opt, "dma_rxsize:", 11)) { - if (strict_strtoul(opt + 11, 0, - (unsigned long *)&dma_rxsize)) - goto err; - } else if (!strncmp(opt, "buf_sz:", 7)) { - if (strict_strtoul(opt + 7, 0, - (unsigned long *)&buf_sz)) - goto err; - } else if (!strncmp(opt, "tc:", 3)) { - if (strict_strtoul(opt + 3, 0, (unsigned long *)&tc)) - goto err; - } else if (!strncmp(opt, "watchdog:", 9)) { - if (strict_strtoul(opt + 9, 0, - (unsigned long *)&watchdog)) - goto err; - } else if (!strncmp(opt, "flow_ctrl:", 10)) { - if (strict_strtoul(opt + 10, 0, - (unsigned long *)&flow_ctrl)) - goto err; - } else if (!strncmp(opt, "pause:", 6)) { - if (strict_strtoul(opt + 6, 0, (unsigned long *)&pause)) - goto err; -#ifdef CONFIG_STMMAC_TIMER - } else if (!strncmp(opt, "tmrate:", 7)) { - if (strict_strtoul(opt + 7, 0, - (unsigned long *)&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_init(stmmac_init_module); -module_exit(stmmac_cleanup_module); - -MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet driver"); -MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>"); -MODULE_LICENSE("GPL"); |