18d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang/* 28d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * Faraday FTMAC100 10/100 Ethernet 38d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * 48d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * (C) Copyright 2009-2011 Faraday Technology 58d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * Po-Yu Chuang <ratbert@faraday-tech.com> 68d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * 78d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * This program is free software; you can redistribute it and/or modify 88d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * it under the terms of the GNU General Public License as published by 98d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * the Free Software Foundation; either version 2 of the License, or 108d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * (at your option) any later version. 118d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * 128d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * This program is distributed in the hope that it will be useful, 138d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * but WITHOUT ANY WARRANTY; without even the implied warranty of 148d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 158d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * GNU General Public License for more details. 168d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * 178d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * You should have received a copy of the GNU General Public License 188d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * along with this program; if not, write to the Free Software 198d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 208d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang */ 218d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 228d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 238d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 248d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang#include <linux/dma-mapping.h> 258d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang#include <linux/etherdevice.h> 268d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang#include <linux/ethtool.h> 278d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang#include <linux/init.h> 2817f1bbca1baf2f652fa9c102ec239d6abded94c1Thomas Faber#include <linux/interrupt.h> 298d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang#include <linux/io.h> 308d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang#include <linux/mii.h> 318d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang#include <linux/module.h> 328d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang#include <linux/netdevice.h> 338d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang#include <linux/platform_device.h> 348d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 358d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang#include "ftmac100.h" 368d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 378d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang#define DRV_NAME "ftmac100" 388d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang#define DRV_VERSION "0.2" 398d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 408d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang#define RX_QUEUE_ENTRIES 128 /* must be power of 2 */ 418d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang#define TX_QUEUE_ENTRIES 16 /* must be power of 2 */ 428d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 438d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang#define MAX_PKT_SIZE 1518 448d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang#define RX_BUF_SIZE 2044 /* must be smaller than 0x7ff */ 458d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 468d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang#if MAX_PKT_SIZE > 0x7ff 478d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang#error invalid MAX_PKT_SIZE 488d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang#endif 498d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 508d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang#if RX_BUF_SIZE > 0x7ff || RX_BUF_SIZE > PAGE_SIZE 518d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang#error invalid RX_BUF_SIZE 528d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang#endif 538d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 548d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang/****************************************************************************** 558d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * private data 568d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang *****************************************************************************/ 578d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstruct ftmac100_descs { 588d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct ftmac100_rxdes rxdes[RX_QUEUE_ENTRIES]; 598d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct ftmac100_txdes txdes[TX_QUEUE_ENTRIES]; 608d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang}; 618d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 628d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstruct ftmac100 { 638d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct resource *res; 648d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang void __iomem *base; 658d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang int irq; 668d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 678d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct ftmac100_descs *descs; 688d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang dma_addr_t descs_dma_addr; 698d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 708d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang unsigned int rx_pointer; 718d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang unsigned int tx_clean_pointer; 728d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang unsigned int tx_pointer; 738d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang unsigned int tx_pending; 748d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 758d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang spinlock_t tx_lock; 768d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 778d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct net_device *netdev; 788d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct device *dev; 798d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct napi_struct napi; 808d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 818d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct mii_if_info mii; 828d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang}; 838d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 84c05e7ac99c32d4e5d8be272c0ba95b0fdcab431bEric Dumazetstatic int ftmac100_alloc_rx_page(struct ftmac100 *priv, 85c05e7ac99c32d4e5d8be272c0ba95b0fdcab431bEric Dumazet struct ftmac100_rxdes *rxdes, gfp_t gfp); 868d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 878d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang/****************************************************************************** 888d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * internal functions (hardware register access) 898d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang *****************************************************************************/ 908d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang#define INT_MASK_ALL_ENABLED (FTMAC100_INT_RPKT_FINISH | \ 918d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang FTMAC100_INT_NORXBUF | \ 928d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang FTMAC100_INT_XPKT_OK | \ 938d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang FTMAC100_INT_XPKT_LOST | \ 948d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang FTMAC100_INT_RPKT_LOST | \ 958d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang FTMAC100_INT_AHB_ERR | \ 968d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang FTMAC100_INT_PHYSTS_CHG) 978d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 988d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang#define INT_MASK_ALL_DISABLED 0 998d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 1008d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic void ftmac100_enable_all_int(struct ftmac100 *priv) 1018d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 1028d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang iowrite32(INT_MASK_ALL_ENABLED, priv->base + FTMAC100_OFFSET_IMR); 1038d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 1048d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 1058d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic void ftmac100_disable_all_int(struct ftmac100 *priv) 1068d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 1078d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang iowrite32(INT_MASK_ALL_DISABLED, priv->base + FTMAC100_OFFSET_IMR); 1088d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 1098d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 1108d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic void ftmac100_set_rx_ring_base(struct ftmac100 *priv, dma_addr_t addr) 1118d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 1128d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang iowrite32(addr, priv->base + FTMAC100_OFFSET_RXR_BADR); 1138d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 1148d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 1158d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic void ftmac100_set_tx_ring_base(struct ftmac100 *priv, dma_addr_t addr) 1168d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 1178d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang iowrite32(addr, priv->base + FTMAC100_OFFSET_TXR_BADR); 1188d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 1198d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 1208d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic void ftmac100_txdma_start_polling(struct ftmac100 *priv) 1218d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 1228d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang iowrite32(1, priv->base + FTMAC100_OFFSET_TXPD); 1238d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 1248d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 1258d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic int ftmac100_reset(struct ftmac100 *priv) 1268d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 1278d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct net_device *netdev = priv->netdev; 1288d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang int i; 1298d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 1308d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang /* NOTE: reset clears all registers */ 1318d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang iowrite32(FTMAC100_MACCR_SW_RST, priv->base + FTMAC100_OFFSET_MACCR); 1328d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 1338d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang for (i = 0; i < 5; i++) { 1348d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang unsigned int maccr; 1358d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 1368d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang maccr = ioread32(priv->base + FTMAC100_OFFSET_MACCR); 1378d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (!(maccr & FTMAC100_MACCR_SW_RST)) { 1388d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang /* 1398d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * FTMAC100_MACCR_SW_RST cleared does not indicate 1408d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * that hardware reset completed (what the f*ck). 1418d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * We still need to wait for a while. 1428d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang */ 143eee9700c5dd8fbac517c8c1e85c60b688bc311a9Adam Jaremko udelay(500); 1448d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return 0; 1458d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } 1468d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 147eee9700c5dd8fbac517c8c1e85c60b688bc311a9Adam Jaremko udelay(1000); 1488d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } 1498d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 1508d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev_err(netdev, "software reset failed\n"); 1518d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return -EIO; 1528d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 1538d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 1548d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic void ftmac100_set_mac(struct ftmac100 *priv, const unsigned char *mac) 1558d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 1568d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang unsigned int maddr = mac[0] << 8 | mac[1]; 1578d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang unsigned int laddr = mac[2] << 24 | mac[3] << 16 | mac[4] << 8 | mac[5]; 1588d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 1598d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang iowrite32(maddr, priv->base + FTMAC100_OFFSET_MAC_MADR); 1608d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang iowrite32(laddr, priv->base + FTMAC100_OFFSET_MAC_LADR); 1618d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 1628d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 1638d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang#define MACCR_ENABLE_ALL (FTMAC100_MACCR_XMT_EN | \ 1648d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang FTMAC100_MACCR_RCV_EN | \ 1658d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang FTMAC100_MACCR_XDMA_EN | \ 1668d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang FTMAC100_MACCR_RDMA_EN | \ 1678d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang FTMAC100_MACCR_CRC_APD | \ 1688d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang FTMAC100_MACCR_FULLDUP | \ 1698d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang FTMAC100_MACCR_RX_RUNT | \ 1708d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang FTMAC100_MACCR_RX_BROADPKT) 1718d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 1728d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic int ftmac100_start_hw(struct ftmac100 *priv) 1738d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 1748d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct net_device *netdev = priv->netdev; 1758d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 1768d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (ftmac100_reset(priv)) 1778d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return -EIO; 1788d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 1798d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang /* setup ring buffer base registers */ 1808d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_set_rx_ring_base(priv, 1818d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang priv->descs_dma_addr + 1828d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang offsetof(struct ftmac100_descs, rxdes)); 1838d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_set_tx_ring_base(priv, 1848d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang priv->descs_dma_addr + 1858d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang offsetof(struct ftmac100_descs, txdes)); 1868d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 1878d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang iowrite32(FTMAC100_APTC_RXPOLL_CNT(1), priv->base + FTMAC100_OFFSET_APTC); 1888d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 1898d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_set_mac(priv, netdev->dev_addr); 1908d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 1918d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang iowrite32(MACCR_ENABLE_ALL, priv->base + FTMAC100_OFFSET_MACCR); 1928d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return 0; 1938d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 1948d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 1958d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic void ftmac100_stop_hw(struct ftmac100 *priv) 1968d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 1978d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang iowrite32(0, priv->base + FTMAC100_OFFSET_MACCR); 1988d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 1998d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 2008d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang/****************************************************************************** 2018d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * internal functions (receive descriptor) 2028d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang *****************************************************************************/ 2038d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic bool ftmac100_rxdes_first_segment(struct ftmac100_rxdes *rxdes) 2048d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 2058d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_FRS); 2068d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 2078d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 2088d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic bool ftmac100_rxdes_last_segment(struct ftmac100_rxdes *rxdes) 2098d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 2108d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_LRS); 2118d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 2128d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 2138d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic bool ftmac100_rxdes_owned_by_dma(struct ftmac100_rxdes *rxdes) 2148d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 2158d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_RXDMA_OWN); 2168d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 2178d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 2188d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic void ftmac100_rxdes_set_dma_own(struct ftmac100_rxdes *rxdes) 2198d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 2208d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang /* clear status bits */ 2218d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang rxdes->rxdes0 = cpu_to_le32(FTMAC100_RXDES0_RXDMA_OWN); 2228d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 2238d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 2248d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic bool ftmac100_rxdes_rx_error(struct ftmac100_rxdes *rxdes) 2258d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 2268d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_RX_ERR); 2278d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 2288d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 2298d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic bool ftmac100_rxdes_crc_error(struct ftmac100_rxdes *rxdes) 2308d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 2318d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_CRC_ERR); 2328d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 2338d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 2348d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic bool ftmac100_rxdes_frame_too_long(struct ftmac100_rxdes *rxdes) 2358d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 2368d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_FTL); 2378d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 2388d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 2398d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic bool ftmac100_rxdes_runt(struct ftmac100_rxdes *rxdes) 2408d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 2418d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_RUNT); 2428d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 2438d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 2448d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic bool ftmac100_rxdes_odd_nibble(struct ftmac100_rxdes *rxdes) 2458d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 2468d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_RX_ODD_NB); 2478d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 2488d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 2498d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic unsigned int ftmac100_rxdes_frame_length(struct ftmac100_rxdes *rxdes) 2508d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 2518d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return le32_to_cpu(rxdes->rxdes0) & FTMAC100_RXDES0_RFL; 2528d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 2538d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 2548d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic bool ftmac100_rxdes_multicast(struct ftmac100_rxdes *rxdes) 2558d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 2568d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_MULTICAST); 2578d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 2588d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 2598d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic void ftmac100_rxdes_set_buffer_size(struct ftmac100_rxdes *rxdes, 2608d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang unsigned int size) 2618d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 2628d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang rxdes->rxdes1 &= cpu_to_le32(FTMAC100_RXDES1_EDORR); 2638d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang rxdes->rxdes1 |= cpu_to_le32(FTMAC100_RXDES1_RXBUF_SIZE(size)); 2648d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 2658d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 2668d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic void ftmac100_rxdes_set_end_of_ring(struct ftmac100_rxdes *rxdes) 2678d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 2688d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang rxdes->rxdes1 |= cpu_to_le32(FTMAC100_RXDES1_EDORR); 2698d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 2708d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 2718d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic void ftmac100_rxdes_set_dma_addr(struct ftmac100_rxdes *rxdes, 2728d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang dma_addr_t addr) 2738d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 2748d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang rxdes->rxdes2 = cpu_to_le32(addr); 2758d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 2768d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 2778d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic dma_addr_t ftmac100_rxdes_get_dma_addr(struct ftmac100_rxdes *rxdes) 2788d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 2798d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return le32_to_cpu(rxdes->rxdes2); 2808d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 2818d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 2828d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang/* 2838d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * rxdes3 is not used by hardware. We use it to keep track of page. 2848d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * Since hardware does not touch it, we can skip cpu_to_le32()/le32_to_cpu(). 2858d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang */ 2868d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic void ftmac100_rxdes_set_page(struct ftmac100_rxdes *rxdes, struct page *page) 2878d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 2888d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang rxdes->rxdes3 = (unsigned int)page; 2898d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 2908d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 2918d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic struct page *ftmac100_rxdes_get_page(struct ftmac100_rxdes *rxdes) 2928d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 2938d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return (struct page *)rxdes->rxdes3; 2948d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 2958d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 2968d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang/****************************************************************************** 2978d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * internal functions (receive) 2988d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang *****************************************************************************/ 2998d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic int ftmac100_next_rx_pointer(int pointer) 3008d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 3018d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return (pointer + 1) & (RX_QUEUE_ENTRIES - 1); 3028d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 3038d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 3048d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic void ftmac100_rx_pointer_advance(struct ftmac100 *priv) 3058d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 3068d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang priv->rx_pointer = ftmac100_next_rx_pointer(priv->rx_pointer); 3078d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 3088d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 3098d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic struct ftmac100_rxdes *ftmac100_current_rxdes(struct ftmac100 *priv) 3108d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 3118d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return &priv->descs->rxdes[priv->rx_pointer]; 3128d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 3138d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 3148d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic struct ftmac100_rxdes * 3158d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangftmac100_rx_locate_first_segment(struct ftmac100 *priv) 3168d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 3178d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct ftmac100_rxdes *rxdes = ftmac100_current_rxdes(priv); 3188d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 3198d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang while (!ftmac100_rxdes_owned_by_dma(rxdes)) { 3208d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (ftmac100_rxdes_first_segment(rxdes)) 3218d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return rxdes; 3228d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 3238d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_rxdes_set_dma_own(rxdes); 3248d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_rx_pointer_advance(priv); 3258d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang rxdes = ftmac100_current_rxdes(priv); 3268d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } 3278d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 3288d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return NULL; 3298d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 3308d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 3318d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic bool ftmac100_rx_packet_error(struct ftmac100 *priv, 3328d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct ftmac100_rxdes *rxdes) 3338d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 3348d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct net_device *netdev = priv->netdev; 3358d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang bool error = false; 3368d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 3378d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (unlikely(ftmac100_rxdes_rx_error(rxdes))) { 3388d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (net_ratelimit()) 3398d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev_info(netdev, "rx err\n"); 3408d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 3418d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev->stats.rx_errors++; 3428d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang error = true; 3438d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } 3448d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 3458d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (unlikely(ftmac100_rxdes_crc_error(rxdes))) { 3468d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (net_ratelimit()) 3478d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev_info(netdev, "rx crc err\n"); 3488d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 3498d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev->stats.rx_crc_errors++; 3508d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang error = true; 3518d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } 3528d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 3538d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (unlikely(ftmac100_rxdes_frame_too_long(rxdes))) { 3548d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (net_ratelimit()) 3558d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev_info(netdev, "rx frame too long\n"); 3568d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 3578d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev->stats.rx_length_errors++; 3588d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang error = true; 3598d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } else if (unlikely(ftmac100_rxdes_runt(rxdes))) { 3608d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (net_ratelimit()) 3618d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev_info(netdev, "rx runt\n"); 3628d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 3638d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev->stats.rx_length_errors++; 3648d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang error = true; 3658d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } else if (unlikely(ftmac100_rxdes_odd_nibble(rxdes))) { 3668d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (net_ratelimit()) 3678d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev_info(netdev, "rx odd nibble\n"); 3688d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 3698d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev->stats.rx_length_errors++; 3708d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang error = true; 3718d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } 3728d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 3738d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return error; 3748d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 3758d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 3768d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic void ftmac100_rx_drop_packet(struct ftmac100 *priv) 3778d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 3788d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct net_device *netdev = priv->netdev; 3798d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct ftmac100_rxdes *rxdes = ftmac100_current_rxdes(priv); 3808d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang bool done = false; 3818d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 3828d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (net_ratelimit()) 3838d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev_dbg(netdev, "drop packet %p\n", rxdes); 3848d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 3858d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang do { 3868d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (ftmac100_rxdes_last_segment(rxdes)) 3878d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang done = true; 3888d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 3898d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_rxdes_set_dma_own(rxdes); 3908d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_rx_pointer_advance(priv); 3918d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang rxdes = ftmac100_current_rxdes(priv); 3928d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } while (!done && !ftmac100_rxdes_owned_by_dma(rxdes)); 3938d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 3948d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev->stats.rx_dropped++; 3958d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 3968d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 3978d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic bool ftmac100_rx_packet(struct ftmac100 *priv, int *processed) 3988d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 3998d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct net_device *netdev = priv->netdev; 4008d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct ftmac100_rxdes *rxdes; 4018d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct sk_buff *skb; 4028d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct page *page; 4038d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang dma_addr_t map; 4048d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang int length; 4058d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 4068d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang rxdes = ftmac100_rx_locate_first_segment(priv); 4078d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (!rxdes) 4088d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return false; 4098d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 4108d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (unlikely(ftmac100_rx_packet_error(priv, rxdes))) { 4118d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_rx_drop_packet(priv); 4128d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return true; 4138d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } 4148d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 4158d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang /* 4168d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * It is impossible to get multi-segment packets 4178d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * because we always provide big enough receive buffers. 4188d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang */ 4198d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (unlikely(!ftmac100_rxdes_last_segment(rxdes))) 4208d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang BUG(); 4218d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 4228d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang /* start processing */ 4238d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang skb = netdev_alloc_skb_ip_align(netdev, 128); 4248d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (unlikely(!skb)) { 4258d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (net_ratelimit()) 4268d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev_err(netdev, "rx skb alloc failed\n"); 4278d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 4288d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_rx_drop_packet(priv); 4298d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return true; 4308d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } 4318d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 4328d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (unlikely(ftmac100_rxdes_multicast(rxdes))) 4338d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev->stats.multicast++; 4348d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 4358d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang map = ftmac100_rxdes_get_dma_addr(rxdes); 4368d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang dma_unmap_page(priv->dev, map, RX_BUF_SIZE, DMA_FROM_DEVICE); 4378d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 4388d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang length = ftmac100_rxdes_frame_length(rxdes); 4398d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang page = ftmac100_rxdes_get_page(rxdes); 4408d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang skb_fill_page_desc(skb, 0, page, 0, length); 4418d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang skb->len += length; 4428d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang skb->data_len += length; 44396cd8951684adaa5fd72952adef532d0b42f70e1Eric Dumazet 44496cd8951684adaa5fd72952adef532d0b42f70e1Eric Dumazet /* page might be freed in __pskb_pull_tail() */ 44596cd8951684adaa5fd72952adef532d0b42f70e1Eric Dumazet if (length > 64) 44696cd8951684adaa5fd72952adef532d0b42f70e1Eric Dumazet skb->truesize += PAGE_SIZE; 4478d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang __pskb_pull_tail(skb, min(length, 64)); 4488d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 449c05e7ac99c32d4e5d8be272c0ba95b0fdcab431bEric Dumazet ftmac100_alloc_rx_page(priv, rxdes, GFP_ATOMIC); 4508d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 4518d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_rx_pointer_advance(priv); 4528d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 4538d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang skb->protocol = eth_type_trans(skb, netdev); 4548d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 4558d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev->stats.rx_packets++; 4568d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev->stats.rx_bytes += skb->len; 4578d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 4588d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang /* push packet to protocol stack */ 4598d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netif_receive_skb(skb); 4608d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 4618d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang (*processed)++; 4628d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return true; 4638d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 4648d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 4658d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang/****************************************************************************** 4668d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * internal functions (transmit descriptor) 4678d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang *****************************************************************************/ 4688d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic void ftmac100_txdes_reset(struct ftmac100_txdes *txdes) 4698d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 4708d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang /* clear all except end of ring bit */ 4718d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang txdes->txdes0 = 0; 4728d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang txdes->txdes1 &= cpu_to_le32(FTMAC100_TXDES1_EDOTR); 4738d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang txdes->txdes2 = 0; 4748d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang txdes->txdes3 = 0; 4758d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 4768d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 4778d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic bool ftmac100_txdes_owned_by_dma(struct ftmac100_txdes *txdes) 4788d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 4798d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return txdes->txdes0 & cpu_to_le32(FTMAC100_TXDES0_TXDMA_OWN); 4808d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 4818d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 4828d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic void ftmac100_txdes_set_dma_own(struct ftmac100_txdes *txdes) 4838d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 4848d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang /* 4858d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * Make sure dma own bit will not be set before any other 4868d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * descriptor fields. 4878d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang */ 4888d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang wmb(); 4898d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang txdes->txdes0 |= cpu_to_le32(FTMAC100_TXDES0_TXDMA_OWN); 4908d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 4918d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 4928d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic bool ftmac100_txdes_excessive_collision(struct ftmac100_txdes *txdes) 4938d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 4948d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return txdes->txdes0 & cpu_to_le32(FTMAC100_TXDES0_TXPKT_EXSCOL); 4958d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 4968d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 4978d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic bool ftmac100_txdes_late_collision(struct ftmac100_txdes *txdes) 4988d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 4998d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return txdes->txdes0 & cpu_to_le32(FTMAC100_TXDES0_TXPKT_LATECOL); 5008d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 5018d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 5028d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic void ftmac100_txdes_set_end_of_ring(struct ftmac100_txdes *txdes) 5038d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 5048d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang txdes->txdes1 |= cpu_to_le32(FTMAC100_TXDES1_EDOTR); 5058d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 5068d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 5078d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic void ftmac100_txdes_set_first_segment(struct ftmac100_txdes *txdes) 5088d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 5098d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang txdes->txdes1 |= cpu_to_le32(FTMAC100_TXDES1_FTS); 5108d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 5118d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 5128d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic void ftmac100_txdes_set_last_segment(struct ftmac100_txdes *txdes) 5138d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 5148d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang txdes->txdes1 |= cpu_to_le32(FTMAC100_TXDES1_LTS); 5158d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 5168d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 5178d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic void ftmac100_txdes_set_txint(struct ftmac100_txdes *txdes) 5188d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 5198d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang txdes->txdes1 |= cpu_to_le32(FTMAC100_TXDES1_TXIC); 5208d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 5218d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 5228d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic void ftmac100_txdes_set_buffer_size(struct ftmac100_txdes *txdes, 5238d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang unsigned int len) 5248d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 5258d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang txdes->txdes1 |= cpu_to_le32(FTMAC100_TXDES1_TXBUF_SIZE(len)); 5268d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 5278d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 5288d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic void ftmac100_txdes_set_dma_addr(struct ftmac100_txdes *txdes, 5298d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang dma_addr_t addr) 5308d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 5318d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang txdes->txdes2 = cpu_to_le32(addr); 5328d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 5338d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 5348d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic dma_addr_t ftmac100_txdes_get_dma_addr(struct ftmac100_txdes *txdes) 5358d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 5368d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return le32_to_cpu(txdes->txdes2); 5378d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 5388d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 5398d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang/* 5408d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * txdes3 is not used by hardware. We use it to keep track of socket buffer. 5418d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * Since hardware does not touch it, we can skip cpu_to_le32()/le32_to_cpu(). 5428d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang */ 5438d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic void ftmac100_txdes_set_skb(struct ftmac100_txdes *txdes, struct sk_buff *skb) 5448d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 5458d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang txdes->txdes3 = (unsigned int)skb; 5468d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 5478d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 5488d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic struct sk_buff *ftmac100_txdes_get_skb(struct ftmac100_txdes *txdes) 5498d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 5508d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return (struct sk_buff *)txdes->txdes3; 5518d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 5528d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 5538d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang/****************************************************************************** 5548d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * internal functions (transmit) 5558d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang *****************************************************************************/ 5568d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic int ftmac100_next_tx_pointer(int pointer) 5578d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 5588d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return (pointer + 1) & (TX_QUEUE_ENTRIES - 1); 5598d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 5608d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 5618d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic void ftmac100_tx_pointer_advance(struct ftmac100 *priv) 5628d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 5638d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang priv->tx_pointer = ftmac100_next_tx_pointer(priv->tx_pointer); 5648d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 5658d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 5668d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic void ftmac100_tx_clean_pointer_advance(struct ftmac100 *priv) 5678d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 5688d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang priv->tx_clean_pointer = ftmac100_next_tx_pointer(priv->tx_clean_pointer); 5698d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 5708d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 5718d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic struct ftmac100_txdes *ftmac100_current_txdes(struct ftmac100 *priv) 5728d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 5738d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return &priv->descs->txdes[priv->tx_pointer]; 5748d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 5758d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 5768d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic struct ftmac100_txdes *ftmac100_current_clean_txdes(struct ftmac100 *priv) 5778d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 5788d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return &priv->descs->txdes[priv->tx_clean_pointer]; 5798d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 5808d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 5818d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic bool ftmac100_tx_complete_packet(struct ftmac100 *priv) 5828d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 5838d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct net_device *netdev = priv->netdev; 5848d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct ftmac100_txdes *txdes; 5858d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct sk_buff *skb; 5868d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang dma_addr_t map; 5878d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 5888d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (priv->tx_pending == 0) 5898d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return false; 5908d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 5918d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang txdes = ftmac100_current_clean_txdes(priv); 5928d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 5938d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (ftmac100_txdes_owned_by_dma(txdes)) 5948d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return false; 5958d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 5968d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang skb = ftmac100_txdes_get_skb(txdes); 5978d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang map = ftmac100_txdes_get_dma_addr(txdes); 5988d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 5998d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (unlikely(ftmac100_txdes_excessive_collision(txdes) || 6008d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_txdes_late_collision(txdes))) { 6018d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang /* 6028d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * packet transmitted to ethernet lost due to late collision 6038d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * or excessive collision 6048d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang */ 6058d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev->stats.tx_aborted_errors++; 6068d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } else { 6078d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev->stats.tx_packets++; 6088d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev->stats.tx_bytes += skb->len; 6098d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } 6108d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 6118d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang dma_unmap_single(priv->dev, map, skb_headlen(skb), DMA_TO_DEVICE); 6128d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang dev_kfree_skb(skb); 6138d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 6148d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_txdes_reset(txdes); 6158d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 6168d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_tx_clean_pointer_advance(priv); 6178d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 6188d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang spin_lock(&priv->tx_lock); 6198d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang priv->tx_pending--; 6208d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang spin_unlock(&priv->tx_lock); 6218d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netif_wake_queue(netdev); 6228d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 6238d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return true; 6248d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 6258d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 6268d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic void ftmac100_tx_complete(struct ftmac100 *priv) 6278d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 6288d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang while (ftmac100_tx_complete_packet(priv)) 6298d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ; 6308d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 6318d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 6328d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic int ftmac100_xmit(struct ftmac100 *priv, struct sk_buff *skb, 6338d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang dma_addr_t map) 6348d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 6358d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct net_device *netdev = priv->netdev; 6368d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct ftmac100_txdes *txdes; 6378d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang unsigned int len = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len; 6388d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 6398d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang txdes = ftmac100_current_txdes(priv); 6408d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_tx_pointer_advance(priv); 6418d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 6428d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang /* setup TX descriptor */ 6438d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_txdes_set_skb(txdes, skb); 6448d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_txdes_set_dma_addr(txdes, map); 6458d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 6468d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_txdes_set_first_segment(txdes); 6478d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_txdes_set_last_segment(txdes); 6488d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_txdes_set_txint(txdes); 6498d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_txdes_set_buffer_size(txdes, len); 6508d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 6518d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang spin_lock(&priv->tx_lock); 6528d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang priv->tx_pending++; 6538d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (priv->tx_pending == TX_QUEUE_ENTRIES) 6548d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netif_stop_queue(netdev); 6558d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 6568d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang /* start transmit */ 6578d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_txdes_set_dma_own(txdes); 6588d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang spin_unlock(&priv->tx_lock); 6598d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 6608d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_txdma_start_polling(priv); 6618d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return NETDEV_TX_OK; 6628d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 6638d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 6648d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang/****************************************************************************** 6658d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * internal functions (buffer) 6668d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang *****************************************************************************/ 667c05e7ac99c32d4e5d8be272c0ba95b0fdcab431bEric Dumazetstatic int ftmac100_alloc_rx_page(struct ftmac100 *priv, 668c05e7ac99c32d4e5d8be272c0ba95b0fdcab431bEric Dumazet struct ftmac100_rxdes *rxdes, gfp_t gfp) 6698d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 6708d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct net_device *netdev = priv->netdev; 6718d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct page *page; 6728d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang dma_addr_t map; 6738d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 674c05e7ac99c32d4e5d8be272c0ba95b0fdcab431bEric Dumazet page = alloc_page(gfp); 6758d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (!page) { 6768d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (net_ratelimit()) 6778d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev_err(netdev, "failed to allocate rx page\n"); 6788d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return -ENOMEM; 6798d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } 6808d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 6818d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang map = dma_map_page(priv->dev, page, 0, RX_BUF_SIZE, DMA_FROM_DEVICE); 6828d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (unlikely(dma_mapping_error(priv->dev, map))) { 6838d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (net_ratelimit()) 6848d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev_err(netdev, "failed to map rx page\n"); 6858d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang __free_page(page); 6868d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return -ENOMEM; 6878d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } 6888d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 6898d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_rxdes_set_page(rxdes, page); 6908d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_rxdes_set_dma_addr(rxdes, map); 6918d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_rxdes_set_buffer_size(rxdes, RX_BUF_SIZE); 6928d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_rxdes_set_dma_own(rxdes); 6938d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return 0; 6948d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 6958d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 6968d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic void ftmac100_free_buffers(struct ftmac100 *priv) 6978d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 6988d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang int i; 6998d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 7008d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang for (i = 0; i < RX_QUEUE_ENTRIES; i++) { 7018d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct ftmac100_rxdes *rxdes = &priv->descs->rxdes[i]; 7028d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct page *page = ftmac100_rxdes_get_page(rxdes); 7038d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang dma_addr_t map = ftmac100_rxdes_get_dma_addr(rxdes); 7048d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 7058d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (!page) 7068d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang continue; 7078d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 7088d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang dma_unmap_page(priv->dev, map, RX_BUF_SIZE, DMA_FROM_DEVICE); 7098d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang __free_page(page); 7108d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } 7118d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 7128d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang for (i = 0; i < TX_QUEUE_ENTRIES; i++) { 7138d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct ftmac100_txdes *txdes = &priv->descs->txdes[i]; 7148d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct sk_buff *skb = ftmac100_txdes_get_skb(txdes); 7158d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang dma_addr_t map = ftmac100_txdes_get_dma_addr(txdes); 7168d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 7178d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (!skb) 7188d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang continue; 7198d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 7208d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang dma_unmap_single(priv->dev, map, skb_headlen(skb), DMA_TO_DEVICE); 7218d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang dev_kfree_skb(skb); 7228d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } 7238d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 7248d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang dma_free_coherent(priv->dev, sizeof(struct ftmac100_descs), 7258d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang priv->descs, priv->descs_dma_addr); 7268d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 7278d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 7288d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic int ftmac100_alloc_buffers(struct ftmac100 *priv) 7298d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 7308d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang int i; 7318d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 7328d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang priv->descs = dma_alloc_coherent(priv->dev, sizeof(struct ftmac100_descs), 7338d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang &priv->descs_dma_addr, GFP_KERNEL); 7348d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (!priv->descs) 7358d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return -ENOMEM; 7368d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 7378d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang memset(priv->descs, 0, sizeof(struct ftmac100_descs)); 7388d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 7398d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang /* initialize RX ring */ 7408d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_rxdes_set_end_of_ring(&priv->descs->rxdes[RX_QUEUE_ENTRIES - 1]); 7418d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 7428d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang for (i = 0; i < RX_QUEUE_ENTRIES; i++) { 7438d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct ftmac100_rxdes *rxdes = &priv->descs->rxdes[i]; 7448d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 745c05e7ac99c32d4e5d8be272c0ba95b0fdcab431bEric Dumazet if (ftmac100_alloc_rx_page(priv, rxdes, GFP_KERNEL)) 7468d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang goto err; 7478d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } 7488d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 7498d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang /* initialize TX ring */ 7508d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_txdes_set_end_of_ring(&priv->descs->txdes[TX_QUEUE_ENTRIES - 1]); 7518d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return 0; 7528d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 7538d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangerr: 7548d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_free_buffers(priv); 7558d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return -ENOMEM; 7568d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 7578d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 7588d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang/****************************************************************************** 7598d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * struct mii_if_info functions 7608d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang *****************************************************************************/ 7618d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic int ftmac100_mdio_read(struct net_device *netdev, int phy_id, int reg) 7628d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 7638d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct ftmac100 *priv = netdev_priv(netdev); 7648d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang unsigned int phycr; 7658d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang int i; 7668d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 7678d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang phycr = FTMAC100_PHYCR_PHYAD(phy_id) | 7688d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang FTMAC100_PHYCR_REGAD(reg) | 7698d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang FTMAC100_PHYCR_MIIRD; 7708d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 7718d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang iowrite32(phycr, priv->base + FTMAC100_OFFSET_PHYCR); 7728d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 7738d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang for (i = 0; i < 10; i++) { 7748d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang phycr = ioread32(priv->base + FTMAC100_OFFSET_PHYCR); 7758d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 7768d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if ((phycr & FTMAC100_PHYCR_MIIRD) == 0) 7778d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return phycr & FTMAC100_PHYCR_MIIRDATA; 7788d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 779eee9700c5dd8fbac517c8c1e85c60b688bc311a9Adam Jaremko udelay(100); 7808d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } 7818d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 7828d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev_err(netdev, "mdio read timed out\n"); 7838d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return 0; 7848d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 7858d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 7868d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic void ftmac100_mdio_write(struct net_device *netdev, int phy_id, int reg, 7878d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang int data) 7888d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 7898d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct ftmac100 *priv = netdev_priv(netdev); 7908d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang unsigned int phycr; 7918d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang int i; 7928d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 7938d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang phycr = FTMAC100_PHYCR_PHYAD(phy_id) | 7948d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang FTMAC100_PHYCR_REGAD(reg) | 7958d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang FTMAC100_PHYCR_MIIWR; 7968d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 7978d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang data = FTMAC100_PHYWDATA_MIIWDATA(data); 7988d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 7998d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang iowrite32(data, priv->base + FTMAC100_OFFSET_PHYWDATA); 8008d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang iowrite32(phycr, priv->base + FTMAC100_OFFSET_PHYCR); 8018d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 8028d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang for (i = 0; i < 10; i++) { 8038d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang phycr = ioread32(priv->base + FTMAC100_OFFSET_PHYCR); 8048d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 8058d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if ((phycr & FTMAC100_PHYCR_MIIWR) == 0) 8068d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return; 8078d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 808eee9700c5dd8fbac517c8c1e85c60b688bc311a9Adam Jaremko udelay(100); 8098d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } 8108d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 8118d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev_err(netdev, "mdio write timed out\n"); 8128d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 8138d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 8148d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang/****************************************************************************** 8158d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * struct ethtool_ops functions 8168d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang *****************************************************************************/ 8178d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic void ftmac100_get_drvinfo(struct net_device *netdev, 8188d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct ethtool_drvinfo *info) 8198d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 8208d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang strcpy(info->driver, DRV_NAME); 8218d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang strcpy(info->version, DRV_VERSION); 8228d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang strcpy(info->bus_info, dev_name(&netdev->dev)); 8238d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 8248d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 8258d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic int ftmac100_get_settings(struct net_device *netdev, struct ethtool_cmd *cmd) 8268d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 8278d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct ftmac100 *priv = netdev_priv(netdev); 8288d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return mii_ethtool_gset(&priv->mii, cmd); 8298d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 8308d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 8318d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic int ftmac100_set_settings(struct net_device *netdev, struct ethtool_cmd *cmd) 8328d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 8338d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct ftmac100 *priv = netdev_priv(netdev); 8348d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return mii_ethtool_sset(&priv->mii, cmd); 8358d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 8368d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 8378d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic int ftmac100_nway_reset(struct net_device *netdev) 8388d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 8398d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct ftmac100 *priv = netdev_priv(netdev); 8408d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return mii_nway_restart(&priv->mii); 8418d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 8428d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 8438d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic u32 ftmac100_get_link(struct net_device *netdev) 8448d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 8458d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct ftmac100 *priv = netdev_priv(netdev); 8468d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return mii_link_ok(&priv->mii); 8478d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 8488d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 8498d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic const struct ethtool_ops ftmac100_ethtool_ops = { 8508d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang .set_settings = ftmac100_set_settings, 8518d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang .get_settings = ftmac100_get_settings, 8528d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang .get_drvinfo = ftmac100_get_drvinfo, 8538d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang .nway_reset = ftmac100_nway_reset, 8548d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang .get_link = ftmac100_get_link, 8558d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang}; 8568d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 8578d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang/****************************************************************************** 8588d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * interrupt handler 8598d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang *****************************************************************************/ 8608d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic irqreturn_t ftmac100_interrupt(int irq, void *dev_id) 8618d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 8628d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct net_device *netdev = dev_id; 8638d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct ftmac100 *priv = netdev_priv(netdev); 8648d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 8658d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (likely(netif_running(netdev))) { 8668d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang /* Disable interrupts for polling */ 8678d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_disable_all_int(priv); 8688d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang napi_schedule(&priv->napi); 8698d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } 8708d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 8718d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return IRQ_HANDLED; 8728d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 8738d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 8748d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang/****************************************************************************** 8758d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * struct napi_struct functions 8768d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang *****************************************************************************/ 8778d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic int ftmac100_poll(struct napi_struct *napi, int budget) 8788d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 8798d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct ftmac100 *priv = container_of(napi, struct ftmac100, napi); 8808d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct net_device *netdev = priv->netdev; 8818d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang unsigned int status; 8828d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang bool completed = true; 8838d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang int rx = 0; 8848d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 8858d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang status = ioread32(priv->base + FTMAC100_OFFSET_ISR); 8868d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 8878d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (status & (FTMAC100_INT_RPKT_FINISH | FTMAC100_INT_NORXBUF)) { 8888d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang /* 8898d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * FTMAC100_INT_RPKT_FINISH: 8908d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * RX DMA has received packets into RX buffer successfully 8918d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * 8928d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * FTMAC100_INT_NORXBUF: 8938d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * RX buffer unavailable 8948d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang */ 8958d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang bool retry; 8968d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 8978d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang do { 8988d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang retry = ftmac100_rx_packet(priv, &rx); 8998d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } while (retry && rx < budget); 9008d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 9018d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (retry && rx == budget) 9028d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang completed = false; 9038d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } 9048d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 9058d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (status & (FTMAC100_INT_XPKT_OK | FTMAC100_INT_XPKT_LOST)) { 9068d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang /* 9078d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * FTMAC100_INT_XPKT_OK: 9088d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * packet transmitted to ethernet successfully 9098d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * 9108d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * FTMAC100_INT_XPKT_LOST: 9118d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * packet transmitted to ethernet lost due to late 9128d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * collision or excessive collision 9138d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang */ 9148d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_tx_complete(priv); 9158d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } 9168d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 9178d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (status & (FTMAC100_INT_NORXBUF | FTMAC100_INT_RPKT_LOST | 9188d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang FTMAC100_INT_AHB_ERR | FTMAC100_INT_PHYSTS_CHG)) { 9198d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (net_ratelimit()) 9208d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev_info(netdev, "[ISR] = 0x%x: %s%s%s%s\n", status, 9218d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang status & FTMAC100_INT_NORXBUF ? "NORXBUF " : "", 9228d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang status & FTMAC100_INT_RPKT_LOST ? "RPKT_LOST " : "", 9238d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang status & FTMAC100_INT_AHB_ERR ? "AHB_ERR " : "", 9248d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang status & FTMAC100_INT_PHYSTS_CHG ? "PHYSTS_CHG" : ""); 9258d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 9268d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (status & FTMAC100_INT_NORXBUF) { 9278d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang /* RX buffer unavailable */ 9288d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev->stats.rx_over_errors++; 9298d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } 9308d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 9318d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (status & FTMAC100_INT_RPKT_LOST) { 9328d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang /* received packet lost due to RX FIFO full */ 9338d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev->stats.rx_fifo_errors++; 9348d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } 9358d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 9368d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (status & FTMAC100_INT_PHYSTS_CHG) { 9378d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang /* PHY link status change */ 9388d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang mii_check_link(&priv->mii); 9398d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } 9408d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } 9418d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 9428d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (completed) { 9438d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang /* stop polling */ 9448d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang napi_complete(napi); 9458d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_enable_all_int(priv); 9468d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } 9478d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 9488d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return rx; 9498d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 9508d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 9518d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang/****************************************************************************** 9528d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * struct net_device_ops functions 9538d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang *****************************************************************************/ 9548d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic int ftmac100_open(struct net_device *netdev) 9558d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 9568d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct ftmac100 *priv = netdev_priv(netdev); 9578d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang int err; 9588d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 9598d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang err = ftmac100_alloc_buffers(priv); 9608d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (err) { 9618d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev_err(netdev, "failed to allocate buffers\n"); 9628d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang goto err_alloc; 9638d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } 9648d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 9658d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang err = request_irq(priv->irq, ftmac100_interrupt, 0, netdev->name, netdev); 9668d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (err) { 9678d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev_err(netdev, "failed to request irq %d\n", priv->irq); 9688d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang goto err_irq; 9698d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } 9708d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 9718d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang priv->rx_pointer = 0; 9728d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang priv->tx_clean_pointer = 0; 9738d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang priv->tx_pointer = 0; 9748d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang priv->tx_pending = 0; 9758d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 9768d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang err = ftmac100_start_hw(priv); 9778d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (err) 9788d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang goto err_hw; 9798d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 9808d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang napi_enable(&priv->napi); 9818d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netif_start_queue(netdev); 9828d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 9838d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_enable_all_int(priv); 9848d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 9858d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return 0; 9868d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 9878d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangerr_hw: 9888d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang free_irq(priv->irq, netdev); 9898d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangerr_irq: 9908d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_free_buffers(priv); 9918d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangerr_alloc: 9928d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return err; 9938d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 9948d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 9958d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic int ftmac100_stop(struct net_device *netdev) 9968d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 9978d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct ftmac100 *priv = netdev_priv(netdev); 9988d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 9998d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_disable_all_int(priv); 10008d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netif_stop_queue(netdev); 10018d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang napi_disable(&priv->napi); 10028d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_stop_hw(priv); 10038d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang free_irq(priv->irq, netdev); 10048d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang ftmac100_free_buffers(priv); 10058d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 10068d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return 0; 10078d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 10088d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 10098d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic int ftmac100_hard_start_xmit(struct sk_buff *skb, struct net_device *netdev) 10108d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 10118d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct ftmac100 *priv = netdev_priv(netdev); 10128d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang dma_addr_t map; 10138d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 10148d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (unlikely(skb->len > MAX_PKT_SIZE)) { 10158d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (net_ratelimit()) 10168d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev_dbg(netdev, "tx packet too big\n"); 10178d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 10188d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev->stats.tx_dropped++; 10198d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang dev_kfree_skb(skb); 10208d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return NETDEV_TX_OK; 10218d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } 10228d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 10238d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang map = dma_map_single(priv->dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); 10248d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (unlikely(dma_mapping_error(priv->dev, map))) { 10258d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang /* drop packet */ 10268d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (net_ratelimit()) 10278d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev_err(netdev, "map socket buffer failed\n"); 10288d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 10298d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev->stats.tx_dropped++; 10308d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang dev_kfree_skb(skb); 10318d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return NETDEV_TX_OK; 10328d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } 10338d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 10348d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return ftmac100_xmit(priv, skb, map); 10358d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 10368d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 10378d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang/* optional */ 10388d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic int ftmac100_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) 10398d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 10408d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct ftmac100 *priv = netdev_priv(netdev); 10418d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct mii_ioctl_data *data = if_mii(ifr); 10428d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 10438d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return generic_mii_ioctl(&priv->mii, data, cmd, NULL); 10448d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 10458d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 10468d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic const struct net_device_ops ftmac100_netdev_ops = { 10478d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang .ndo_open = ftmac100_open, 10488d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang .ndo_stop = ftmac100_stop, 10498d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang .ndo_start_xmit = ftmac100_hard_start_xmit, 10508d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang .ndo_set_mac_address = eth_mac_addr, 10518d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang .ndo_validate_addr = eth_validate_addr, 10528d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang .ndo_do_ioctl = ftmac100_do_ioctl, 10538d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang}; 10548d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 10558d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang/****************************************************************************** 10568d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * struct platform_driver functions 10578d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang *****************************************************************************/ 10588d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic int ftmac100_probe(struct platform_device *pdev) 10598d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 10608d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct resource *res; 10618d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang int irq; 10628d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct net_device *netdev; 10638d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct ftmac100 *priv; 10648d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang int err; 10658d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 10668d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (!pdev) 10678d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return -ENODEV; 10688d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 10698d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 10708d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (!res) 10718d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return -ENXIO; 10728d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 10738d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang irq = platform_get_irq(pdev, 0); 10748d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (irq < 0) 10758d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return irq; 10768d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 10778d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang /* setup net_device */ 10788d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev = alloc_etherdev(sizeof(*priv)); 10798d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (!netdev) { 10808d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang err = -ENOMEM; 10818d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang goto err_alloc_etherdev; 10828d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } 10838d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 10848d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang SET_NETDEV_DEV(netdev, &pdev->dev); 10858d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang SET_ETHTOOL_OPS(netdev, &ftmac100_ethtool_ops); 10868d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev->netdev_ops = &ftmac100_netdev_ops; 10878d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 10888d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang platform_set_drvdata(pdev, netdev); 10898d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 10908d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang /* setup private data */ 10918d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang priv = netdev_priv(netdev); 10928d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang priv->netdev = netdev; 10938d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang priv->dev = &pdev->dev; 10948d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 10958d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang spin_lock_init(&priv->tx_lock); 10968d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 10978d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang /* initialize NAPI */ 10988d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netif_napi_add(netdev, &priv->napi, ftmac100_poll, 64); 10998d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 11008d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang /* map io memory */ 11018d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang priv->res = request_mem_region(res->start, resource_size(res), 11028d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang dev_name(&pdev->dev)); 11038d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (!priv->res) { 11048d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang dev_err(&pdev->dev, "Could not reserve memory region\n"); 11058d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang err = -ENOMEM; 11068d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang goto err_req_mem; 11078d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } 11088d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 110993d03203d5a165d7a757546245dd1543dfe0ff80Dan Carpenter priv->base = ioremap(res->start, resource_size(res)); 11108d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (!priv->base) { 11118d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang dev_err(&pdev->dev, "Failed to ioremap ethernet registers\n"); 11128d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang err = -EIO; 11138d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang goto err_ioremap; 11148d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } 11158d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 11168d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang priv->irq = irq; 11178d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 11188d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang /* initialize struct mii_if_info */ 11198d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang priv->mii.phy_id = 0; 11208d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang priv->mii.phy_id_mask = 0x1f; 11218d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang priv->mii.reg_num_mask = 0x1f; 11228d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang priv->mii.dev = netdev; 11238d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang priv->mii.mdio_read = ftmac100_mdio_read; 11248d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang priv->mii.mdio_write = ftmac100_mdio_write; 11258d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 11268d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang /* register network device */ 11278d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang err = register_netdev(netdev); 11288d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (err) { 11298d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang dev_err(&pdev->dev, "Failed to register netdev\n"); 11308d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang goto err_register_netdev; 11318d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } 11328d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 11338d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev_info(netdev, "irq %d, mapped at %p\n", priv->irq, priv->base); 11348d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 11358d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang if (!is_valid_ether_addr(netdev->dev_addr)) { 1136f2cedb63df14342ad40a8b5b324fc5d94a60b665Danny Kukawka eth_hw_addr_random(netdev); 11378d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev_info(netdev, "generated random MAC address %pM\n", 11388d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev->dev_addr); 11398d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang } 11408d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 11418d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return 0; 11428d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 11438d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangerr_register_netdev: 11448d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang iounmap(priv->base); 11458d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangerr_ioremap: 11468d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang release_resource(priv->res); 11478d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangerr_req_mem: 11488d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netif_napi_del(&priv->napi); 11498d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang platform_set_drvdata(pdev, NULL); 11508d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang free_netdev(netdev); 11518d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangerr_alloc_etherdev: 11528d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return err; 11538d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 11548d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 11558d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic int __exit ftmac100_remove(struct platform_device *pdev) 11568d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 11578d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct net_device *netdev; 11588d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang struct ftmac100 *priv; 11598d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 11608d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netdev = platform_get_drvdata(pdev); 11618d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang priv = netdev_priv(netdev); 11628d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 11638d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang unregister_netdev(netdev); 11648d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 11658d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang iounmap(priv->base); 11668d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang release_resource(priv->res); 11678d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 11688d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang netif_napi_del(&priv->napi); 11698d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang platform_set_drvdata(pdev, NULL); 11708d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang free_netdev(netdev); 11718d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return 0; 11728d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 11738d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 11748d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic struct platform_driver ftmac100_driver = { 11758d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang .probe = ftmac100_probe, 11768d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang .remove = __exit_p(ftmac100_remove), 11778d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang .driver = { 11788d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang .name = DRV_NAME, 11798d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang .owner = THIS_MODULE, 11808d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang }, 11818d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang}; 11828d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 11838d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang/****************************************************************************** 11848d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang * initialization / finalization 11858d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang *****************************************************************************/ 11868d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic int __init ftmac100_init(void) 11878d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 11888d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang pr_info("Loading version " DRV_VERSION " ...\n"); 11898d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang return platform_driver_register(&ftmac100_driver); 11908d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 11918d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 11928d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangstatic void __exit ftmac100_exit(void) 11938d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang{ 11948d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang platform_driver_unregister(&ftmac100_driver); 11958d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang} 11968d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 11978d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangmodule_init(ftmac100_init); 11988d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuangmodule_exit(ftmac100_exit); 11998d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu Chuang 12008d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu ChuangMODULE_AUTHOR("Po-Yu Chuang <ratbert@faraday-tech.com>"); 12018d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu ChuangMODULE_DESCRIPTION("FTMAC100 driver"); 12028d77c036b57cf813d838f859e11b6a188acdb1fbPo-Yu ChuangMODULE_LICENSE("GPL"); 1203