+++ /dev/null
-/*
- * Faraday FTGMAC100 Gigabit Ethernet
- *
- * (C) Copyright 2009-2011 Faraday Technology
- * Po-Yu Chuang <ratbert@faraday-tech.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that 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., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/dma-mapping.h>
-#include <linux/etherdevice.h>
-#include <linux/ethtool.h>
-#include <linux/init.h>
-#include <linux/io.h>
-#include <linux/module.h>
-#include <linux/netdevice.h>
-#include <linux/phy.h>
-#include <linux/platform_device.h>
-#include <net/ip.h>
-
-#include "ftgmac100.h"
-
-#define DRV_NAME "ftgmac100"
-#define DRV_VERSION "0.7"
-
-#define RX_QUEUE_ENTRIES 256 /* must be power of 2 */
-#define TX_QUEUE_ENTRIES 512 /* must be power of 2 */
-
-#define MAX_PKT_SIZE 1518
-#define RX_BUF_SIZE PAGE_SIZE /* must be smaller than 0x3fff */
-
-/******************************************************************************
- * private data
- *****************************************************************************/
-struct ftgmac100_descs {
- struct ftgmac100_rxdes rxdes[RX_QUEUE_ENTRIES];
- struct ftgmac100_txdes txdes[TX_QUEUE_ENTRIES];
-};
-
-struct ftgmac100 {
- struct resource *res;
- void __iomem *base;
- int irq;
-
- struct ftgmac100_descs *descs;
- dma_addr_t descs_dma_addr;
-
- unsigned int rx_pointer;
- unsigned int tx_clean_pointer;
- unsigned int tx_pointer;
- unsigned int tx_pending;
-
- spinlock_t tx_lock;
-
- struct net_device *netdev;
- struct device *dev;
- struct napi_struct napi;
-
- struct mii_bus *mii_bus;
- int phy_irq[PHY_MAX_ADDR];
- struct phy_device *phydev;
- int old_speed;
-};
-
-static int ftgmac100_alloc_rx_page(struct ftgmac100 *priv,
- struct ftgmac100_rxdes *rxdes, gfp_t gfp);
-
-/******************************************************************************
- * internal functions (hardware register access)
- *****************************************************************************/
-#define INT_MASK_ALL_ENABLED (FTGMAC100_INT_RPKT_LOST | \
- FTGMAC100_INT_XPKT_ETH | \
- FTGMAC100_INT_XPKT_LOST | \
- FTGMAC100_INT_AHB_ERR | \
- FTGMAC100_INT_PHYSTS_CHG | \
- FTGMAC100_INT_RPKT_BUF | \
- FTGMAC100_INT_NO_RXBUF)
-
-static void ftgmac100_set_rx_ring_base(struct ftgmac100 *priv, dma_addr_t addr)
-{
- iowrite32(addr, priv->base + FTGMAC100_OFFSET_RXR_BADR);
-}
-
-static void ftgmac100_set_rx_buffer_size(struct ftgmac100 *priv,
- unsigned int size)
-{
- size = FTGMAC100_RBSR_SIZE(size);
- iowrite32(size, priv->base + FTGMAC100_OFFSET_RBSR);
-}
-
-static void ftgmac100_set_normal_prio_tx_ring_base(struct ftgmac100 *priv,
- dma_addr_t addr)
-{
- iowrite32(addr, priv->base + FTGMAC100_OFFSET_NPTXR_BADR);
-}
-
-static void ftgmac100_txdma_normal_prio_start_polling(struct ftgmac100 *priv)
-{
- iowrite32(1, priv->base + FTGMAC100_OFFSET_NPTXPD);
-}
-
-static int ftgmac100_reset_hw(struct ftgmac100 *priv)
-{
- struct net_device *netdev = priv->netdev;
- int i;
-
- /* NOTE: reset clears all registers */
- iowrite32(FTGMAC100_MACCR_SW_RST, priv->base + FTGMAC100_OFFSET_MACCR);
- for (i = 0; i < 5; i++) {
- unsigned int maccr;
-
- maccr = ioread32(priv->base + FTGMAC100_OFFSET_MACCR);
- if (!(maccr & FTGMAC100_MACCR_SW_RST))
- return 0;
-
- udelay(1000);
- }
-
- netdev_err(netdev, "software reset failed\n");
- return -EIO;
-}
-
-static void ftgmac100_set_mac(struct ftgmac100 *priv, const unsigned char *mac)
-{
- unsigned int maddr = mac[0] << 8 | mac[1];
- unsigned int laddr = mac[2] << 24 | mac[3] << 16 | mac[4] << 8 | mac[5];
-
- iowrite32(maddr, priv->base + FTGMAC100_OFFSET_MAC_MADR);
- iowrite32(laddr, priv->base + FTGMAC100_OFFSET_MAC_LADR);
-}
-
-static void ftgmac100_init_hw(struct ftgmac100 *priv)
-{
- /* setup ring buffer base registers */
- ftgmac100_set_rx_ring_base(priv,
- priv->descs_dma_addr +
- offsetof(struct ftgmac100_descs, rxdes));
- ftgmac100_set_normal_prio_tx_ring_base(priv,
- priv->descs_dma_addr +
- offsetof(struct ftgmac100_descs, txdes));
-
- ftgmac100_set_rx_buffer_size(priv, RX_BUF_SIZE);
-
- iowrite32(FTGMAC100_APTC_RXPOLL_CNT(1), priv->base + FTGMAC100_OFFSET_APTC);
-
- ftgmac100_set_mac(priv, priv->netdev->dev_addr);
-}
-
-#define MACCR_ENABLE_ALL (FTGMAC100_MACCR_TXDMA_EN | \
- FTGMAC100_MACCR_RXDMA_EN | \
- FTGMAC100_MACCR_TXMAC_EN | \
- FTGMAC100_MACCR_RXMAC_EN | \
- FTGMAC100_MACCR_FULLDUP | \
- FTGMAC100_MACCR_CRC_APD | \
- FTGMAC100_MACCR_RX_RUNT | \
- FTGMAC100_MACCR_RX_BROADPKT)
-
-static void ftgmac100_start_hw(struct ftgmac100 *priv, int speed)
-{
- int maccr = MACCR_ENABLE_ALL;
-
- switch (speed) {
- default:
- case 10:
- break;
-
- case 100:
- maccr |= FTGMAC100_MACCR_FAST_MODE;
- break;
-
- case 1000:
- maccr |= FTGMAC100_MACCR_GIGA_MODE;
- break;
- }
-
- iowrite32(maccr, priv->base + FTGMAC100_OFFSET_MACCR);
-}
-
-static void ftgmac100_stop_hw(struct ftgmac100 *priv)
-{
- iowrite32(0, priv->base + FTGMAC100_OFFSET_MACCR);
-}
-
-/******************************************************************************
- * internal functions (receive descriptor)
- *****************************************************************************/
-static bool ftgmac100_rxdes_first_segment(struct ftgmac100_rxdes *rxdes)
-{
- return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_FRS);
-}
-
-static bool ftgmac100_rxdes_last_segment(struct ftgmac100_rxdes *rxdes)
-{
- return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_LRS);
-}
-
-static bool ftgmac100_rxdes_packet_ready(struct ftgmac100_rxdes *rxdes)
-{
- return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_RXPKT_RDY);
-}
-
-static void ftgmac100_rxdes_set_dma_own(struct ftgmac100_rxdes *rxdes)
-{
- /* clear status bits */
- rxdes->rxdes0 &= cpu_to_le32(FTGMAC100_RXDES0_EDORR);
-}
-
-static bool ftgmac100_rxdes_rx_error(struct ftgmac100_rxdes *rxdes)
-{
- return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_RX_ERR);
-}
-
-static bool ftgmac100_rxdes_crc_error(struct ftgmac100_rxdes *rxdes)
-{
- return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_CRC_ERR);
-}
-
-static bool ftgmac100_rxdes_frame_too_long(struct ftgmac100_rxdes *rxdes)
-{
- return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_FTL);
-}
-
-static bool ftgmac100_rxdes_runt(struct ftgmac100_rxdes *rxdes)
-{
- return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_RUNT);
-}
-
-static bool ftgmac100_rxdes_odd_nibble(struct ftgmac100_rxdes *rxdes)
-{
- return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_RX_ODD_NB);
-}
-
-static unsigned int ftgmac100_rxdes_data_length(struct ftgmac100_rxdes *rxdes)
-{
- return le32_to_cpu(rxdes->rxdes0) & FTGMAC100_RXDES0_VDBC;
-}
-
-static bool ftgmac100_rxdes_multicast(struct ftgmac100_rxdes *rxdes)
-{
- return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_MULTICAST);
-}
-
-static void ftgmac100_rxdes_set_end_of_ring(struct ftgmac100_rxdes *rxdes)
-{
- rxdes->rxdes0 |= cpu_to_le32(FTGMAC100_RXDES0_EDORR);
-}
-
-static void ftgmac100_rxdes_set_dma_addr(struct ftgmac100_rxdes *rxdes,
- dma_addr_t addr)
-{
- rxdes->rxdes3 = cpu_to_le32(addr);
-}
-
-static dma_addr_t ftgmac100_rxdes_get_dma_addr(struct ftgmac100_rxdes *rxdes)
-{
- return le32_to_cpu(rxdes->rxdes3);
-}
-
-static bool ftgmac100_rxdes_is_tcp(struct ftgmac100_rxdes *rxdes)
-{
- return (rxdes->rxdes1 & cpu_to_le32(FTGMAC100_RXDES1_PROT_MASK)) ==
- cpu_to_le32(FTGMAC100_RXDES1_PROT_TCPIP);
-}
-
-static bool ftgmac100_rxdes_is_udp(struct ftgmac100_rxdes *rxdes)
-{
- return (rxdes->rxdes1 & cpu_to_le32(FTGMAC100_RXDES1_PROT_MASK)) ==
- cpu_to_le32(FTGMAC100_RXDES1_PROT_UDPIP);
-}
-
-static bool ftgmac100_rxdes_tcpcs_err(struct ftgmac100_rxdes *rxdes)
-{
- return rxdes->rxdes1 & cpu_to_le32(FTGMAC100_RXDES1_TCP_CHKSUM_ERR);
-}
-
-static bool ftgmac100_rxdes_udpcs_err(struct ftgmac100_rxdes *rxdes)
-{
- return rxdes->rxdes1 & cpu_to_le32(FTGMAC100_RXDES1_UDP_CHKSUM_ERR);
-}
-
-static bool ftgmac100_rxdes_ipcs_err(struct ftgmac100_rxdes *rxdes)
-{
- return rxdes->rxdes1 & cpu_to_le32(FTGMAC100_RXDES1_IP_CHKSUM_ERR);
-}
-
-/*
- * rxdes2 is not used by hardware. We use it to keep track of page.
- * Since hardware does not touch it, we can skip cpu_to_le32()/le32_to_cpu().
- */
-static void ftgmac100_rxdes_set_page(struct ftgmac100_rxdes *rxdes, struct page *page)
-{
- rxdes->rxdes2 = (unsigned int)page;
-}
-
-static struct page *ftgmac100_rxdes_get_page(struct ftgmac100_rxdes *rxdes)
-{
- return (struct page *)rxdes->rxdes2;
-}
-
-/******************************************************************************
- * internal functions (receive)
- *****************************************************************************/
-static int ftgmac100_next_rx_pointer(int pointer)
-{
- return (pointer + 1) & (RX_QUEUE_ENTRIES - 1);
-}
-
-static void ftgmac100_rx_pointer_advance(struct ftgmac100 *priv)
-{
- priv->rx_pointer = ftgmac100_next_rx_pointer(priv->rx_pointer);
-}
-
-static struct ftgmac100_rxdes *ftgmac100_current_rxdes(struct ftgmac100 *priv)
-{
- return &priv->descs->rxdes[priv->rx_pointer];
-}
-
-static struct ftgmac100_rxdes *
-ftgmac100_rx_locate_first_segment(struct ftgmac100 *priv)
-{
- struct ftgmac100_rxdes *rxdes = ftgmac100_current_rxdes(priv);
-
- while (ftgmac100_rxdes_packet_ready(rxdes)) {
- if (ftgmac100_rxdes_first_segment(rxdes))
- return rxdes;
-
- ftgmac100_rxdes_set_dma_own(rxdes);
- ftgmac100_rx_pointer_advance(priv);
- rxdes = ftgmac100_current_rxdes(priv);
- }
-
- return NULL;
-}
-
-static bool ftgmac100_rx_packet_error(struct ftgmac100 *priv,
- struct ftgmac100_rxdes *rxdes)
-{
- struct net_device *netdev = priv->netdev;
- bool error = false;
-
- if (unlikely(ftgmac100_rxdes_rx_error(rxdes))) {
- if (net_ratelimit())
- netdev_info(netdev, "rx err\n");
-
- netdev->stats.rx_errors++;
- error = true;
- }
-
- if (unlikely(ftgmac100_rxdes_crc_error(rxdes))) {
- if (net_ratelimit())
- netdev_info(netdev, "rx crc err\n");
-
- netdev->stats.rx_crc_errors++;
- error = true;
- } else if (unlikely(ftgmac100_rxdes_ipcs_err(rxdes))) {
- if (net_ratelimit())
- netdev_info(netdev, "rx IP checksum err\n");
-
- error = true;
- }
-
- if (unlikely(ftgmac100_rxdes_frame_too_long(rxdes))) {
- if (net_ratelimit())
- netdev_info(netdev, "rx frame too long\n");
-
- netdev->stats.rx_length_errors++;
- error = true;
- } else if (unlikely(ftgmac100_rxdes_runt(rxdes))) {
- if (net_ratelimit())
- netdev_info(netdev, "rx runt\n");
-
- netdev->stats.rx_length_errors++;
- error = true;
- } else if (unlikely(ftgmac100_rxdes_odd_nibble(rxdes))) {
- if (net_ratelimit())
- netdev_info(netdev, "rx odd nibble\n");
-
- netdev->stats.rx_length_errors++;
- error = true;
- }
-
- return error;
-}
-
-static void ftgmac100_rx_drop_packet(struct ftgmac100 *priv)
-{
- struct net_device *netdev = priv->netdev;
- struct ftgmac100_rxdes *rxdes = ftgmac100_current_rxdes(priv);
- bool done = false;
-
- if (net_ratelimit())
- netdev_dbg(netdev, "drop packet %p\n", rxdes);
-
- do {
- if (ftgmac100_rxdes_last_segment(rxdes))
- done = true;
-
- ftgmac100_rxdes_set_dma_own(rxdes);
- ftgmac100_rx_pointer_advance(priv);
- rxdes = ftgmac100_current_rxdes(priv);
- } while (!done && ftgmac100_rxdes_packet_ready(rxdes));
-
- netdev->stats.rx_dropped++;
-}
-
-static bool ftgmac100_rx_packet(struct ftgmac100 *priv, int *processed)
-{
- struct net_device *netdev = priv->netdev;
- struct ftgmac100_rxdes *rxdes;
- struct sk_buff *skb;
- bool done = false;
-
- rxdes = ftgmac100_rx_locate_first_segment(priv);
- if (!rxdes)
- return false;
-
- if (unlikely(ftgmac100_rx_packet_error(priv, rxdes))) {
- ftgmac100_rx_drop_packet(priv);
- return true;
- }
-
- /* start processing */
- skb = netdev_alloc_skb_ip_align(netdev, 128);
- if (unlikely(!skb)) {
- if (net_ratelimit())
- netdev_err(netdev, "rx skb alloc failed\n");
-
- ftgmac100_rx_drop_packet(priv);
- return true;
- }
-
- if (unlikely(ftgmac100_rxdes_multicast(rxdes)))
- netdev->stats.multicast++;
-
- /*
- * It seems that HW does checksum incorrectly with fragmented packets,
- * so we are conservative here - if HW checksum error, let software do
- * the checksum again.
- */
- if ((ftgmac100_rxdes_is_tcp(rxdes) && !ftgmac100_rxdes_tcpcs_err(rxdes)) ||
- (ftgmac100_rxdes_is_udp(rxdes) && !ftgmac100_rxdes_udpcs_err(rxdes)))
- skb->ip_summed = CHECKSUM_UNNECESSARY;
-
- do {
- dma_addr_t map = ftgmac100_rxdes_get_dma_addr(rxdes);
- struct page *page = ftgmac100_rxdes_get_page(rxdes);
- unsigned int size;
-
- dma_unmap_page(priv->dev, map, RX_BUF_SIZE, DMA_FROM_DEVICE);
-
- size = ftgmac100_rxdes_data_length(rxdes);
- skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page, 0, size);
-
- skb->len += size;
- skb->data_len += size;
- skb->truesize += size;
-
- if (ftgmac100_rxdes_last_segment(rxdes))
- done = true;
-
- ftgmac100_alloc_rx_page(priv, rxdes, GFP_ATOMIC);
-
- ftgmac100_rx_pointer_advance(priv);
- rxdes = ftgmac100_current_rxdes(priv);
- } while (!done);
-
- __pskb_pull_tail(skb, min(skb->len, 64U));
- skb->protocol = eth_type_trans(skb, netdev);
-
- netdev->stats.rx_packets++;
- netdev->stats.rx_bytes += skb->len;
-
- /* push packet to protocol stack */
- napi_gro_receive(&priv->napi, skb);
-
- (*processed)++;
- return true;
-}
-
-/******************************************************************************
- * internal functions (transmit descriptor)
- *****************************************************************************/
-static void ftgmac100_txdes_reset(struct ftgmac100_txdes *txdes)
-{
- /* clear all except end of ring bit */
- txdes->txdes0 &= cpu_to_le32(FTGMAC100_TXDES0_EDOTR);
- txdes->txdes1 = 0;
- txdes->txdes2 = 0;
- txdes->txdes3 = 0;
-}
-
-static bool ftgmac100_txdes_owned_by_dma(struct ftgmac100_txdes *txdes)
-{
- return txdes->txdes0 & cpu_to_le32(FTGMAC100_TXDES0_TXDMA_OWN);
-}
-
-static void ftgmac100_txdes_set_dma_own(struct ftgmac100_txdes *txdes)
-{
- /*
- * Make sure dma own bit will not be set before any other
- * descriptor fields.
- */
- wmb();
- txdes->txdes0 |= cpu_to_le32(FTGMAC100_TXDES0_TXDMA_OWN);
-}
-
-static void ftgmac100_txdes_set_end_of_ring(struct ftgmac100_txdes *txdes)
-{
- txdes->txdes0 |= cpu_to_le32(FTGMAC100_TXDES0_EDOTR);
-}
-
-static void ftgmac100_txdes_set_first_segment(struct ftgmac100_txdes *txdes)
-{
- txdes->txdes0 |= cpu_to_le32(FTGMAC100_TXDES0_FTS);
-}
-
-static void ftgmac100_txdes_set_last_segment(struct ftgmac100_txdes *txdes)
-{
- txdes->txdes0 |= cpu_to_le32(FTGMAC100_TXDES0_LTS);
-}
-
-static void ftgmac100_txdes_set_buffer_size(struct ftgmac100_txdes *txdes,
- unsigned int len)
-{
- txdes->txdes0 |= cpu_to_le32(FTGMAC100_TXDES0_TXBUF_SIZE(len));
-}
-
-static void ftgmac100_txdes_set_txint(struct ftgmac100_txdes *txdes)
-{
- txdes->txdes1 |= cpu_to_le32(FTGMAC100_TXDES1_TXIC);
-}
-
-static void ftgmac100_txdes_set_tcpcs(struct ftgmac100_txdes *txdes)
-{
- txdes->txdes1 |= cpu_to_le32(FTGMAC100_TXDES1_TCP_CHKSUM);
-}
-
-static void ftgmac100_txdes_set_udpcs(struct ftgmac100_txdes *txdes)
-{
- txdes->txdes1 |= cpu_to_le32(FTGMAC100_TXDES1_UDP_CHKSUM);
-}
-
-static void ftgmac100_txdes_set_ipcs(struct ftgmac100_txdes *txdes)
-{
- txdes->txdes1 |= cpu_to_le32(FTGMAC100_TXDES1_IP_CHKSUM);
-}
-
-static void ftgmac100_txdes_set_dma_addr(struct ftgmac100_txdes *txdes,
- dma_addr_t addr)
-{
- txdes->txdes3 = cpu_to_le32(addr);
-}
-
-static dma_addr_t ftgmac100_txdes_get_dma_addr(struct ftgmac100_txdes *txdes)
-{
- return le32_to_cpu(txdes->txdes3);
-}
-
-/*
- * txdes2 is not used by hardware. We use it to keep track of socket buffer.
- * Since hardware does not touch it, we can skip cpu_to_le32()/le32_to_cpu().
- */
-static void ftgmac100_txdes_set_skb(struct ftgmac100_txdes *txdes,
- struct sk_buff *skb)
-{
- txdes->txdes2 = (unsigned int)skb;
-}
-
-static struct sk_buff *ftgmac100_txdes_get_skb(struct ftgmac100_txdes *txdes)
-{
- return (struct sk_buff *)txdes->txdes2;
-}
-
-/******************************************************************************
- * internal functions (transmit)
- *****************************************************************************/
-static int ftgmac100_next_tx_pointer(int pointer)
-{
- return (pointer + 1) & (TX_QUEUE_ENTRIES - 1);
-}
-
-static void ftgmac100_tx_pointer_advance(struct ftgmac100 *priv)
-{
- priv->tx_pointer = ftgmac100_next_tx_pointer(priv->tx_pointer);
-}
-
-static void ftgmac100_tx_clean_pointer_advance(struct ftgmac100 *priv)
-{
- priv->tx_clean_pointer = ftgmac100_next_tx_pointer(priv->tx_clean_pointer);
-}
-
-static struct ftgmac100_txdes *ftgmac100_current_txdes(struct ftgmac100 *priv)
-{
- return &priv->descs->txdes[priv->tx_pointer];
-}
-
-static struct ftgmac100_txdes *
-ftgmac100_current_clean_txdes(struct ftgmac100 *priv)
-{
- return &priv->descs->txdes[priv->tx_clean_pointer];
-}
-
-static bool ftgmac100_tx_complete_packet(struct ftgmac100 *priv)
-{
- struct net_device *netdev = priv->netdev;
- struct ftgmac100_txdes *txdes;
- struct sk_buff *skb;
- dma_addr_t map;
-
- if (priv->tx_pending == 0)
- return false;
-
- txdes = ftgmac100_current_clean_txdes(priv);
-
- if (ftgmac100_txdes_owned_by_dma(txdes))
- return false;
-
- skb = ftgmac100_txdes_get_skb(txdes);
- map = ftgmac100_txdes_get_dma_addr(txdes);
-
- netdev->stats.tx_packets++;
- netdev->stats.tx_bytes += skb->len;
-
- dma_unmap_single(priv->dev, map, skb_headlen(skb), DMA_TO_DEVICE);
-
- dev_kfree_skb(skb);
-
- ftgmac100_txdes_reset(txdes);
-
- ftgmac100_tx_clean_pointer_advance(priv);
-
- spin_lock(&priv->tx_lock);
- priv->tx_pending--;
- spin_unlock(&priv->tx_lock);
- netif_wake_queue(netdev);
-
- return true;
-}
-
-static void ftgmac100_tx_complete(struct ftgmac100 *priv)
-{
- while (ftgmac100_tx_complete_packet(priv))
- ;
-}
-
-static int ftgmac100_xmit(struct ftgmac100 *priv, struct sk_buff *skb,
- dma_addr_t map)
-{
- struct net_device *netdev = priv->netdev;
- struct ftgmac100_txdes *txdes;
- unsigned int len = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len;
-
- txdes = ftgmac100_current_txdes(priv);
- ftgmac100_tx_pointer_advance(priv);
-
- /* setup TX descriptor */
- ftgmac100_txdes_set_skb(txdes, skb);
- ftgmac100_txdes_set_dma_addr(txdes, map);
- ftgmac100_txdes_set_buffer_size(txdes, len);
-
- ftgmac100_txdes_set_first_segment(txdes);
- ftgmac100_txdes_set_last_segment(txdes);
- ftgmac100_txdes_set_txint(txdes);
- if (skb->ip_summed == CHECKSUM_PARTIAL) {
- __be16 protocol = skb->protocol;
-
- if (protocol == cpu_to_be16(ETH_P_IP)) {
- u8 ip_proto = ip_hdr(skb)->protocol;
-
- ftgmac100_txdes_set_ipcs(txdes);
- if (ip_proto == IPPROTO_TCP)
- ftgmac100_txdes_set_tcpcs(txdes);
- else if (ip_proto == IPPROTO_UDP)
- ftgmac100_txdes_set_udpcs(txdes);
- }
- }
-
- spin_lock(&priv->tx_lock);
- priv->tx_pending++;
- if (priv->tx_pending == TX_QUEUE_ENTRIES)
- netif_stop_queue(netdev);
-
- /* start transmit */
- ftgmac100_txdes_set_dma_own(txdes);
- spin_unlock(&priv->tx_lock);
-
- ftgmac100_txdma_normal_prio_start_polling(priv);
-
- return NETDEV_TX_OK;
-}
-
-/******************************************************************************
- * internal functions (buffer)
- *****************************************************************************/
-static int ftgmac100_alloc_rx_page(struct ftgmac100 *priv,
- struct ftgmac100_rxdes *rxdes, gfp_t gfp)
-{
- struct net_device *netdev = priv->netdev;
- struct page *page;
- dma_addr_t map;
-
- page = alloc_page(gfp);
- if (!page) {
- if (net_ratelimit())
- netdev_err(netdev, "failed to allocate rx page\n");
- return -ENOMEM;
- }
-
- map = dma_map_page(priv->dev, page, 0, RX_BUF_SIZE, DMA_FROM_DEVICE);
- if (unlikely(dma_mapping_error(priv->dev, map))) {
- if (net_ratelimit())
- netdev_err(netdev, "failed to map rx page\n");
- __free_page(page);
- return -ENOMEM;
- }
-
- ftgmac100_rxdes_set_page(rxdes, page);
- ftgmac100_rxdes_set_dma_addr(rxdes, map);
- ftgmac100_rxdes_set_dma_own(rxdes);
- return 0;
-}
-
-static void ftgmac100_free_buffers(struct ftgmac100 *priv)
-{
- int i;
-
- for (i = 0; i < RX_QUEUE_ENTRIES; i++) {
- struct ftgmac100_rxdes *rxdes = &priv->descs->rxdes[i];
- struct page *page = ftgmac100_rxdes_get_page(rxdes);
- dma_addr_t map = ftgmac100_rxdes_get_dma_addr(rxdes);
-
- if (!page)
- continue;
-
- dma_unmap_page(priv->dev, map, RX_BUF_SIZE, DMA_FROM_DEVICE);
- __free_page(page);
- }
-
- for (i = 0; i < TX_QUEUE_ENTRIES; i++) {
- struct ftgmac100_txdes *txdes = &priv->descs->txdes[i];
- struct sk_buff *skb = ftgmac100_txdes_get_skb(txdes);
- dma_addr_t map = ftgmac100_txdes_get_dma_addr(txdes);
-
- if (!skb)
- continue;
-
- dma_unmap_single(priv->dev, map, skb_headlen(skb), DMA_TO_DEVICE);
- dev_kfree_skb(skb);
- }
-
- dma_free_coherent(priv->dev, sizeof(struct ftgmac100_descs),
- priv->descs, priv->descs_dma_addr);
-}
-
-static int ftgmac100_alloc_buffers(struct ftgmac100 *priv)
-{
- int i;
-
- priv->descs = dma_alloc_coherent(priv->dev,
- sizeof(struct ftgmac100_descs),
- &priv->descs_dma_addr, GFP_KERNEL);
- if (!priv->descs)
- return -ENOMEM;
-
- memset(priv->descs, 0, sizeof(struct ftgmac100_descs));
-
- /* initialize RX ring */
- ftgmac100_rxdes_set_end_of_ring(&priv->descs->rxdes[RX_QUEUE_ENTRIES - 1]);
-
- for (i = 0; i < RX_QUEUE_ENTRIES; i++) {
- struct ftgmac100_rxdes *rxdes = &priv->descs->rxdes[i];
-
- if (ftgmac100_alloc_rx_page(priv, rxdes, GFP_KERNEL))
- goto err;
- }
-
- /* initialize TX ring */
- ftgmac100_txdes_set_end_of_ring(&priv->descs->txdes[TX_QUEUE_ENTRIES - 1]);
- return 0;
-
-err:
- ftgmac100_free_buffers(priv);
- return -ENOMEM;
-}
-
-/******************************************************************************
- * internal functions (mdio)
- *****************************************************************************/
-static void ftgmac100_adjust_link(struct net_device *netdev)
-{
- struct ftgmac100 *priv = netdev_priv(netdev);
- struct phy_device *phydev = priv->phydev;
- int ier;
-
- if (phydev->speed == priv->old_speed)
- return;
-
- priv->old_speed = phydev->speed;
-
- ier = ioread32(priv->base + FTGMAC100_OFFSET_IER);
-
- /* disable all interrupts */
- iowrite32(0, priv->base + FTGMAC100_OFFSET_IER);
-
- netif_stop_queue(netdev);
- ftgmac100_stop_hw(priv);
-
- netif_start_queue(netdev);
- ftgmac100_init_hw(priv);
- ftgmac100_start_hw(priv, phydev->speed);
-
- /* re-enable interrupts */
- iowrite32(ier, priv->base + FTGMAC100_OFFSET_IER);
-}
-
-static int ftgmac100_mii_probe(struct ftgmac100 *priv)
-{
- struct net_device *netdev = priv->netdev;
- struct phy_device *phydev = NULL;
- int i;
-
- /* search for connect PHY device */
- for (i = 0; i < PHY_MAX_ADDR; i++) {
- struct phy_device *tmp = priv->mii_bus->phy_map[i];
-
- if (tmp) {
- phydev = tmp;
- break;
- }
- }
-
- /* now we are supposed to have a proper phydev, to attach to... */
- if (!phydev) {
- netdev_info(netdev, "%s: no PHY found\n", netdev->name);
- return -ENODEV;
- }
-
- phydev = phy_connect(netdev, dev_name(&phydev->dev),
- &ftgmac100_adjust_link, 0,
- PHY_INTERFACE_MODE_GMII);
-
- if (IS_ERR(phydev)) {
- netdev_err(netdev, "%s: Could not attach to PHY\n", netdev->name);
- return PTR_ERR(phydev);
- }
-
- priv->phydev = phydev;
- return 0;
-}
-
-/******************************************************************************
- * struct mii_bus functions
- *****************************************************************************/
-static int ftgmac100_mdiobus_read(struct mii_bus *bus, int phy_addr, int regnum)
-{
- struct net_device *netdev = bus->priv;
- struct ftgmac100 *priv = netdev_priv(netdev);
- unsigned int phycr;
- int i;
-
- phycr = ioread32(priv->base + FTGMAC100_OFFSET_PHYCR);
-
- /* preserve MDC cycle threshold */
- phycr &= FTGMAC100_PHYCR_MDC_CYCTHR_MASK;
-
- phycr |= FTGMAC100_PHYCR_PHYAD(phy_addr) |
- FTGMAC100_PHYCR_REGAD(regnum) |
- FTGMAC100_PHYCR_MIIRD;
-
- iowrite32(phycr, priv->base + FTGMAC100_OFFSET_PHYCR);
-
- for (i = 0; i < 10; i++) {
- phycr = ioread32(priv->base + FTGMAC100_OFFSET_PHYCR);
-
- if ((phycr & FTGMAC100_PHYCR_MIIRD) == 0) {
- int data;
-
- data = ioread32(priv->base + FTGMAC100_OFFSET_PHYDATA);
- return FTGMAC100_PHYDATA_MIIRDATA(data);
- }
-
- udelay(100);
- }
-
- netdev_err(netdev, "mdio read timed out\n");
- return -EIO;
-}
-
-static int ftgmac100_mdiobus_write(struct mii_bus *bus, int phy_addr,
- int regnum, u16 value)
-{
- struct net_device *netdev = bus->priv;
- struct ftgmac100 *priv = netdev_priv(netdev);
- unsigned int phycr;
- int data;
- int i;
-
- phycr = ioread32(priv->base + FTGMAC100_OFFSET_PHYCR);
-
- /* preserve MDC cycle threshold */
- phycr &= FTGMAC100_PHYCR_MDC_CYCTHR_MASK;
-
- phycr |= FTGMAC100_PHYCR_PHYAD(phy_addr) |
- FTGMAC100_PHYCR_REGAD(regnum) |
- FTGMAC100_PHYCR_MIIWR;
-
- data = FTGMAC100_PHYDATA_MIIWDATA(value);
-
- iowrite32(data, priv->base + FTGMAC100_OFFSET_PHYDATA);
- iowrite32(phycr, priv->base + FTGMAC100_OFFSET_PHYCR);
-
- for (i = 0; i < 10; i++) {
- phycr = ioread32(priv->base + FTGMAC100_OFFSET_PHYCR);
-
- if ((phycr & FTGMAC100_PHYCR_MIIWR) == 0)
- return 0;
-
- udelay(100);
- }
-
- netdev_err(netdev, "mdio write timed out\n");
- return -EIO;
-}
-
-static int ftgmac100_mdiobus_reset(struct mii_bus *bus)
-{
- return 0;
-}
-
-/******************************************************************************
- * struct ethtool_ops functions
- *****************************************************************************/
-static void ftgmac100_get_drvinfo(struct net_device *netdev,
- struct ethtool_drvinfo *info)
-{
- strcpy(info->driver, DRV_NAME);
- strcpy(info->version, DRV_VERSION);
- strcpy(info->bus_info, dev_name(&netdev->dev));
-}
-
-static int ftgmac100_get_settings(struct net_device *netdev,
- struct ethtool_cmd *cmd)
-{
- struct ftgmac100 *priv = netdev_priv(netdev);
-
- return phy_ethtool_gset(priv->phydev, cmd);
-}
-
-static int ftgmac100_set_settings(struct net_device *netdev,
- struct ethtool_cmd *cmd)
-{
- struct ftgmac100 *priv = netdev_priv(netdev);
-
- return phy_ethtool_sset(priv->phydev, cmd);
-}
-
-static const struct ethtool_ops ftgmac100_ethtool_ops = {
- .set_settings = ftgmac100_set_settings,
- .get_settings = ftgmac100_get_settings,
- .get_drvinfo = ftgmac100_get_drvinfo,
- .get_link = ethtool_op_get_link,
-};
-
-/******************************************************************************
- * interrupt handler
- *****************************************************************************/
-static irqreturn_t ftgmac100_interrupt(int irq, void *dev_id)
-{
- struct net_device *netdev = dev_id;
- struct ftgmac100 *priv = netdev_priv(netdev);
-
- if (likely(netif_running(netdev))) {
- /* Disable interrupts for polling */
- iowrite32(0, priv->base + FTGMAC100_OFFSET_IER);
- napi_schedule(&priv->napi);
- }
-
- return IRQ_HANDLED;
-}
-
-/******************************************************************************
- * struct napi_struct functions
- *****************************************************************************/
-static int ftgmac100_poll(struct napi_struct *napi, int budget)
-{
- struct ftgmac100 *priv = container_of(napi, struct ftgmac100, napi);
- struct net_device *netdev = priv->netdev;
- unsigned int status;
- bool completed = true;
- int rx = 0;
-
- status = ioread32(priv->base + FTGMAC100_OFFSET_ISR);
- iowrite32(status, priv->base + FTGMAC100_OFFSET_ISR);
-
- if (status & (FTGMAC100_INT_RPKT_BUF | FTGMAC100_INT_NO_RXBUF)) {
- /*
- * FTGMAC100_INT_RPKT_BUF:
- * RX DMA has received packets into RX buffer successfully
- *
- * FTGMAC100_INT_NO_RXBUF:
- * RX buffer unavailable
- */
- bool retry;
-
- do {
- retry = ftgmac100_rx_packet(priv, &rx);
- } while (retry && rx < budget);
-
- if (retry && rx == budget)
- completed = false;
- }
-
- if (status & (FTGMAC100_INT_XPKT_ETH | FTGMAC100_INT_XPKT_LOST)) {
- /*
- * FTGMAC100_INT_XPKT_ETH:
- * packet transmitted to ethernet successfully
- *
- * FTGMAC100_INT_XPKT_LOST:
- * packet transmitted to ethernet lost due to late
- * collision or excessive collision
- */
- ftgmac100_tx_complete(priv);
- }
-
- if (status & (FTGMAC100_INT_NO_RXBUF | FTGMAC100_INT_RPKT_LOST |
- FTGMAC100_INT_AHB_ERR | FTGMAC100_INT_PHYSTS_CHG)) {
- if (net_ratelimit())
- netdev_info(netdev, "[ISR] = 0x%x: %s%s%s%s\n", status,
- status & FTGMAC100_INT_NO_RXBUF ? "NO_RXBUF " : "",
- status & FTGMAC100_INT_RPKT_LOST ? "RPKT_LOST " : "",
- status & FTGMAC100_INT_AHB_ERR ? "AHB_ERR " : "",
- status & FTGMAC100_INT_PHYSTS_CHG ? "PHYSTS_CHG" : "");
-
- if (status & FTGMAC100_INT_NO_RXBUF) {
- /* RX buffer unavailable */
- netdev->stats.rx_over_errors++;
- }
-
- if (status & FTGMAC100_INT_RPKT_LOST) {
- /* received packet lost due to RX FIFO full */
- netdev->stats.rx_fifo_errors++;
- }
- }
-
- if (completed) {
- napi_complete(napi);
-
- /* enable all interrupts */
- iowrite32(INT_MASK_ALL_ENABLED, priv->base + FTGMAC100_OFFSET_IER);
- }
-
- return rx;
-}
-
-/******************************************************************************
- * struct net_device_ops functions
- *****************************************************************************/
-static int ftgmac100_open(struct net_device *netdev)
-{
- struct ftgmac100 *priv = netdev_priv(netdev);
- int err;
-
- err = ftgmac100_alloc_buffers(priv);
- if (err) {
- netdev_err(netdev, "failed to allocate buffers\n");
- goto err_alloc;
- }
-
- err = request_irq(priv->irq, ftgmac100_interrupt, 0, netdev->name, netdev);
- if (err) {
- netdev_err(netdev, "failed to request irq %d\n", priv->irq);
- goto err_irq;
- }
-
- priv->rx_pointer = 0;
- priv->tx_clean_pointer = 0;
- priv->tx_pointer = 0;
- priv->tx_pending = 0;
-
- err = ftgmac100_reset_hw(priv);
- if (err)
- goto err_hw;
-
- ftgmac100_init_hw(priv);
- ftgmac100_start_hw(priv, 10);
-
- phy_start(priv->phydev);
-
- napi_enable(&priv->napi);
- netif_start_queue(netdev);
-
- /* enable all interrupts */
- iowrite32(INT_MASK_ALL_ENABLED, priv->base + FTGMAC100_OFFSET_IER);
- return 0;
-
-err_hw:
- free_irq(priv->irq, netdev);
-err_irq:
- ftgmac100_free_buffers(priv);
-err_alloc:
- return err;
-}
-
-static int ftgmac100_stop(struct net_device *netdev)
-{
- struct ftgmac100 *priv = netdev_priv(netdev);
-
- /* disable all interrupts */
- iowrite32(0, priv->base + FTGMAC100_OFFSET_IER);
-
- netif_stop_queue(netdev);
- napi_disable(&priv->napi);
- phy_stop(priv->phydev);
-
- ftgmac100_stop_hw(priv);
- free_irq(priv->irq, netdev);
- ftgmac100_free_buffers(priv);
-
- return 0;
-}
-
-static int ftgmac100_hard_start_xmit(struct sk_buff *skb,
- struct net_device *netdev)
-{
- struct ftgmac100 *priv = netdev_priv(netdev);
- dma_addr_t map;
-
- if (unlikely(skb->len > MAX_PKT_SIZE)) {
- if (net_ratelimit())
- netdev_dbg(netdev, "tx packet too big\n");
-
- netdev->stats.tx_dropped++;
- dev_kfree_skb(skb);
- return NETDEV_TX_OK;
- }
-
- map = dma_map_single(priv->dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE);
- if (unlikely(dma_mapping_error(priv->dev, map))) {
- /* drop packet */
- if (net_ratelimit())
- netdev_err(netdev, "map socket buffer failed\n");
-
- netdev->stats.tx_dropped++;
- dev_kfree_skb(skb);
- return NETDEV_TX_OK;
- }
-
- return ftgmac100_xmit(priv, skb, map);
-}
-
-/* optional */
-static int ftgmac100_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
-{
- struct ftgmac100 *priv = netdev_priv(netdev);
-
- return phy_mii_ioctl(priv->phydev, ifr, cmd);
-}
-
-static const struct net_device_ops ftgmac100_netdev_ops = {
- .ndo_open = ftgmac100_open,
- .ndo_stop = ftgmac100_stop,
- .ndo_start_xmit = ftgmac100_hard_start_xmit,
- .ndo_set_mac_address = eth_mac_addr,
- .ndo_validate_addr = eth_validate_addr,
- .ndo_do_ioctl = ftgmac100_do_ioctl,
-};
-
-/******************************************************************************
- * struct platform_driver functions
- *****************************************************************************/
-static int ftgmac100_probe(struct platform_device *pdev)
-{
- struct resource *res;
- int irq;
- struct net_device *netdev;
- struct ftgmac100 *priv;
- int err;
- int i;
-
- if (!pdev)
- return -ENODEV;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res)
- return -ENXIO;
-
- irq = platform_get_irq(pdev, 0);
- if (irq < 0)
- return irq;
-
- /* setup net_device */
- netdev = alloc_etherdev(sizeof(*priv));
- if (!netdev) {
- err = -ENOMEM;
- goto err_alloc_etherdev;
- }
-
- SET_NETDEV_DEV(netdev, &pdev->dev);
-
- SET_ETHTOOL_OPS(netdev, &ftgmac100_ethtool_ops);
- netdev->netdev_ops = &ftgmac100_netdev_ops;
- netdev->features = NETIF_F_IP_CSUM | NETIF_F_GRO;
-
- platform_set_drvdata(pdev, netdev);
-
- /* setup private data */
- priv = netdev_priv(netdev);
- priv->netdev = netdev;
- priv->dev = &pdev->dev;
-
- spin_lock_init(&priv->tx_lock);
-
- /* initialize NAPI */
- netif_napi_add(netdev, &priv->napi, ftgmac100_poll, 64);
-
- /* map io memory */
- priv->res = request_mem_region(res->start, resource_size(res),
- dev_name(&pdev->dev));
- if (!priv->res) {
- dev_err(&pdev->dev, "Could not reserve memory region\n");
- err = -ENOMEM;
- goto err_req_mem;
- }
-
- priv->base = ioremap(res->start, resource_size(res));
- if (!priv->base) {
- dev_err(&pdev->dev, "Failed to ioremap ethernet registers\n");
- err = -EIO;
- goto err_ioremap;
- }
-
- priv->irq = irq;
-
- /* initialize mdio bus */
- priv->mii_bus = mdiobus_alloc();
- if (!priv->mii_bus) {
- err = -EIO;
- goto err_alloc_mdiobus;
- }
-
- priv->mii_bus->name = "ftgmac100_mdio";
- snprintf(priv->mii_bus->id, MII_BUS_ID_SIZE, "ftgmac100_mii");
-
- priv->mii_bus->priv = netdev;
- priv->mii_bus->read = ftgmac100_mdiobus_read;
- priv->mii_bus->write = ftgmac100_mdiobus_write;
- priv->mii_bus->reset = ftgmac100_mdiobus_reset;
- priv->mii_bus->irq = priv->phy_irq;
-
- for (i = 0; i < PHY_MAX_ADDR; i++)
- priv->mii_bus->irq[i] = PHY_POLL;
-
- err = mdiobus_register(priv->mii_bus);
- if (err) {
- dev_err(&pdev->dev, "Cannot register MDIO bus!\n");
- goto err_register_mdiobus;
- }
-
- err = ftgmac100_mii_probe(priv);
- if (err) {
- dev_err(&pdev->dev, "MII Probe failed!\n");
- goto err_mii_probe;
- }
-
- /* register network device */
- err = register_netdev(netdev);
- if (err) {
- dev_err(&pdev->dev, "Failed to register netdev\n");
- goto err_register_netdev;
- }
-
- netdev_info(netdev, "irq %d, mapped at %p\n", priv->irq, priv->base);
-
- if (!is_valid_ether_addr(netdev->dev_addr)) {
- random_ether_addr(netdev->dev_addr);
- netdev_info(netdev, "generated random MAC address %pM\n",
- netdev->dev_addr);
- }
-
- return 0;
-
-err_register_netdev:
- phy_disconnect(priv->phydev);
-err_mii_probe:
- mdiobus_unregister(priv->mii_bus);
-err_register_mdiobus:
- mdiobus_free(priv->mii_bus);
-err_alloc_mdiobus:
- iounmap(priv->base);
-err_ioremap:
- release_resource(priv->res);
-err_req_mem:
- netif_napi_del(&priv->napi);
- platform_set_drvdata(pdev, NULL);
- free_netdev(netdev);
-err_alloc_etherdev:
- return err;
-}
-
-static int __exit ftgmac100_remove(struct platform_device *pdev)
-{
- struct net_device *netdev;
- struct ftgmac100 *priv;
-
- netdev = platform_get_drvdata(pdev);
- priv = netdev_priv(netdev);
-
- unregister_netdev(netdev);
-
- phy_disconnect(priv->phydev);
- mdiobus_unregister(priv->mii_bus);
- mdiobus_free(priv->mii_bus);
-
- iounmap(priv->base);
- release_resource(priv->res);
-
- netif_napi_del(&priv->napi);
- platform_set_drvdata(pdev, NULL);
- free_netdev(netdev);
- return 0;
-}
-
-static struct platform_driver ftgmac100_driver = {
- .probe = ftgmac100_probe,
- .remove = __exit_p(ftgmac100_remove),
- .driver = {
- .name = DRV_NAME,
- .owner = THIS_MODULE,
- },
-};
-
-/******************************************************************************
- * initialization / finalization
- *****************************************************************************/
-static int __init ftgmac100_init(void)
-{
- pr_info("Loading version " DRV_VERSION " ...\n");
- return platform_driver_register(&ftgmac100_driver);
-}
-
-static void __exit ftgmac100_exit(void)
-{
- platform_driver_unregister(&ftgmac100_driver);
-}
-
-module_init(ftgmac100_init);
-module_exit(ftgmac100_exit);
-
-MODULE_AUTHOR("Po-Yu Chuang <ratbert@faraday-tech.com>");
-MODULE_DESCRIPTION("FTGMAC100 driver");
-MODULE_LICENSE("GPL");
git.openpandora.org / pandora-kernel.git / blobdiff