diff options
author | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2011-06-22 00:55:27 (GMT) |
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committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2011-08-11 23:29:35 (GMT) |
commit | baf0fbfe7ea34cd676e3362a62033d8ca1c52d99 (patch) | |
tree | 339eac61055d73c8301169ca46591eb7717b93a9 /drivers/net/ftgmac100.c | |
parent | b47da97728c045a8fd75f36e59ba08cddc8f2292 (diff) | |
download | linux-fsl-qoriq-baf0fbfe7ea34cd676e3362a62033d8ca1c52d99.tar.xz |
ftgmac100/ftmac100: Move the Faraday drivers
Move the Faraday driver into drivers/net/ethernet/faraday/ and
make the necessary Kconfig and Makefile changes.
CC: "Po-Yu Chuang" <ratbert@faraday-tech.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: Po-Yu Chuang <ratbert@faraday-tech.com>
Diffstat (limited to 'drivers/net/ftgmac100.c')
-rw-r--r-- | drivers/net/ftgmac100.c | 1365 |
1 files changed, 0 insertions, 1365 deletions
diff --git a/drivers/net/ftgmac100.c b/drivers/net/ftgmac100.c deleted file mode 100644 index 54709af..0000000 --- a/drivers/net/ftgmac100.c +++ /dev/null @@ -1,1365 +0,0 @@ -/* - * 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"); |