Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * drivers/net/mv643xx_eth.c - Driver for MV643XX ethernet ports |
| 3 | * Copyright (C) 2002 Matthew Dharm <mdharm@momenco.com> |
| 4 | * |
| 5 | * Based on the 64360 driver from: |
| 6 | * Copyright (C) 2002 rabeeh@galileo.co.il |
| 7 | * |
| 8 | * Copyright (C) 2003 PMC-Sierra, Inc., |
Olaf Hering | 3bb8a18a | 2006-01-05 22:45:45 -0800 | [diff] [blame] | 9 | * written by Manish Lachwani |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | * |
| 11 | * Copyright (C) 2003 Ralf Baechle <ralf@linux-mips.org> |
| 12 | * |
Dale Farnsworth | c8aaea2 | 2006-03-03 10:02:05 -0700 | [diff] [blame] | 13 | * Copyright (C) 2004-2006 MontaVista Software, Inc. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | * Dale Farnsworth <dale@farnsworth.org> |
| 15 | * |
| 16 | * Copyright (C) 2004 Steven J. Hill <sjhill1@rockwellcollins.com> |
| 17 | * <sjhill@realitydiluted.com> |
| 18 | * |
| 19 | * This program is free software; you can redistribute it and/or |
| 20 | * modify it under the terms of the GNU General Public License |
| 21 | * as published by the Free Software Foundation; either version 2 |
| 22 | * of the License, or (at your option) any later version. |
| 23 | * |
| 24 | * This program is distributed in the hope that it will be useful, |
| 25 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 26 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 27 | * GNU General Public License for more details. |
| 28 | * |
| 29 | * You should have received a copy of the GNU General Public License |
| 30 | * along with this program; if not, write to the Free Software |
| 31 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 32 | */ |
| 33 | #include <linux/init.h> |
| 34 | #include <linux/dma-mapping.h> |
Al Viro | b6298c2 | 2006-01-18 19:35:54 -0500 | [diff] [blame] | 35 | #include <linux/in.h> |
| 36 | #include <linux/ip.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include <linux/tcp.h> |
| 38 | #include <linux/udp.h> |
| 39 | #include <linux/etherdevice.h> |
| 40 | |
| 41 | #include <linux/bitops.h> |
| 42 | #include <linux/delay.h> |
| 43 | #include <linux/ethtool.h> |
Russell King | d052d1b | 2005-10-29 19:07:23 +0100 | [diff] [blame] | 44 | #include <linux/platform_device.h> |
| 45 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | #include <asm/io.h> |
| 47 | #include <asm/types.h> |
| 48 | #include <asm/pgtable.h> |
| 49 | #include <asm/system.h> |
| 50 | #include <asm/delay.h> |
| 51 | #include "mv643xx_eth.h" |
| 52 | |
| 53 | /* |
| 54 | * The first part is the high level driver of the gigE ethernet ports. |
| 55 | */ |
| 56 | |
| 57 | /* Constants */ |
| 58 | #define VLAN_HLEN 4 |
| 59 | #define FCS_LEN 4 |
Dale Farnsworth | b44cd57 | 2006-01-16 16:51:22 -0700 | [diff] [blame] | 60 | #define DMA_ALIGN 8 /* hw requires 8-byte alignment */ |
| 61 | #define HW_IP_ALIGN 2 /* hw aligns IP header */ |
| 62 | #define WRAP HW_IP_ALIGN + ETH_HLEN + VLAN_HLEN + FCS_LEN |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | #define RX_SKB_SIZE ((dev->mtu + WRAP + 7) & ~0x7) |
| 64 | |
Dale Farnsworth | ff561ee | 2006-03-03 10:02:51 -0700 | [diff] [blame^] | 65 | #define ETH_RX_QUEUES_ENABLED (1 << 0) /* use only Q0 for receive */ |
| 66 | #define ETH_TX_QUEUES_ENABLED (1 << 0) /* use only Q0 for transmit */ |
| 67 | |
Dale Farnsworth | c2e5b35 | 2006-01-16 17:00:24 -0700 | [diff] [blame] | 68 | #define INT_UNMASK_ALL 0x0007ffff |
| 69 | #define INT_UNMASK_ALL_EXT 0x0011ffff |
| 70 | #define INT_MASK_ALL 0x00000000 |
| 71 | #define INT_MASK_ALL_EXT 0x00000000 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | #define INT_CAUSE_CHECK_BITS INT_CAUSE_UNMASK_ALL |
| 73 | #define INT_CAUSE_CHECK_BITS_EXT INT_CAUSE_UNMASK_ALL_EXT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | |
| 75 | #ifdef MV643XX_CHECKSUM_OFFLOAD_TX |
| 76 | #define MAX_DESCS_PER_SKB (MAX_SKB_FRAGS + 1) |
| 77 | #else |
| 78 | #define MAX_DESCS_PER_SKB 1 |
| 79 | #endif |
| 80 | |
| 81 | #define PHY_WAIT_ITERATIONS 1000 /* 1000 iterations * 10uS = 10mS max */ |
| 82 | #define PHY_WAIT_MICRO_SECONDS 10 |
| 83 | |
| 84 | /* Static function declarations */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | static void eth_port_uc_addr_get(struct net_device *dev, |
| 86 | unsigned char *MacAddr); |
Dale Farnsworth | 16e0301 | 2006-01-16 16:50:02 -0700 | [diff] [blame] | 87 | static void eth_port_set_multicast_list(struct net_device *); |
Dale Farnsworth | 9f8dd31 | 2006-01-27 01:10:47 -0700 | [diff] [blame] | 88 | static void mv643xx_eth_port_enable_tx(unsigned int port_num, |
Dale Farnsworth | 12a87c6 | 2006-03-03 10:00:22 -0700 | [diff] [blame] | 89 | unsigned int queues); |
Dale Farnsworth | 9f8dd31 | 2006-01-27 01:10:47 -0700 | [diff] [blame] | 90 | static void mv643xx_eth_port_enable_rx(unsigned int port_num, |
Dale Farnsworth | 12a87c6 | 2006-03-03 10:00:22 -0700 | [diff] [blame] | 91 | unsigned int queues); |
Dale Farnsworth | 9f8dd31 | 2006-01-27 01:10:47 -0700 | [diff] [blame] | 92 | static unsigned int mv643xx_eth_port_disable_tx(unsigned int port_num); |
| 93 | static unsigned int mv643xx_eth_port_disable_rx(unsigned int port_num); |
Dale Farnsworth | ab4384a | 2006-01-16 16:59:21 -0700 | [diff] [blame] | 94 | static int mv643xx_eth_open(struct net_device *); |
| 95 | static int mv643xx_eth_stop(struct net_device *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | static int mv643xx_eth_change_mtu(struct net_device *, int); |
| 97 | static struct net_device_stats *mv643xx_eth_get_stats(struct net_device *); |
| 98 | static void eth_port_init_mac_tables(unsigned int eth_port_num); |
| 99 | #ifdef MV643XX_NAPI |
| 100 | static int mv643xx_poll(struct net_device *dev, int *budget); |
| 101 | #endif |
James Chapman | c28a4f8 | 2006-01-27 01:13:15 -0700 | [diff] [blame] | 102 | static int ethernet_phy_get(unsigned int eth_port_num); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | static void ethernet_phy_set(unsigned int eth_port_num, int phy_addr); |
| 104 | static int ethernet_phy_detect(unsigned int eth_port_num); |
James Chapman | c28a4f8 | 2006-01-27 01:13:15 -0700 | [diff] [blame] | 105 | static int mv643xx_mdio_read(struct net_device *dev, int phy_id, int location); |
| 106 | static void mv643xx_mdio_write(struct net_device *dev, int phy_id, int location, int val); |
James Chapman | d0412d9 | 2006-01-27 01:15:30 -0700 | [diff] [blame] | 107 | static int mv643xx_eth_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | static struct ethtool_ops mv643xx_ethtool_ops; |
| 109 | |
| 110 | static char mv643xx_driver_name[] = "mv643xx_eth"; |
| 111 | static char mv643xx_driver_version[] = "1.0"; |
| 112 | |
| 113 | static void __iomem *mv643xx_eth_shared_base; |
| 114 | |
| 115 | /* used to protect MV643XX_ETH_SMI_REG, which is shared across ports */ |
Ingo Molnar | a9f6a0d | 2005-09-09 13:10:41 -0700 | [diff] [blame] | 116 | static DEFINE_SPINLOCK(mv643xx_eth_phy_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | |
| 118 | static inline u32 mv_read(int offset) |
| 119 | { |
Al Viro | dc074a8 | 2005-04-25 07:55:58 -0700 | [diff] [blame] | 120 | void __iomem *reg_base; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | |
| 122 | reg_base = mv643xx_eth_shared_base - MV643XX_ETH_SHARED_REGS; |
| 123 | |
| 124 | return readl(reg_base + offset); |
| 125 | } |
| 126 | |
| 127 | static inline void mv_write(int offset, u32 data) |
| 128 | { |
Al Viro | dc074a8 | 2005-04-25 07:55:58 -0700 | [diff] [blame] | 129 | void __iomem *reg_base; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | |
| 131 | reg_base = mv643xx_eth_shared_base - MV643XX_ETH_SHARED_REGS; |
| 132 | writel(data, reg_base + offset); |
| 133 | } |
| 134 | |
| 135 | /* |
| 136 | * Changes MTU (maximum transfer unit) of the gigabit ethenret port |
| 137 | * |
| 138 | * Input : pointer to ethernet interface network device structure |
| 139 | * new mtu size |
| 140 | * Output : 0 upon success, -EINVAL upon failure |
| 141 | */ |
| 142 | static int mv643xx_eth_change_mtu(struct net_device *dev, int new_mtu) |
| 143 | { |
Dale Farnsworth | 8f51870 | 2006-01-16 16:56:30 -0700 | [diff] [blame] | 144 | if ((new_mtu > 9500) || (new_mtu < 64)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | |
| 147 | dev->mtu = new_mtu; |
| 148 | /* |
| 149 | * Stop then re-open the interface. This will allocate RX skb's with |
| 150 | * the new MTU. |
| 151 | * There is a possible danger that the open will not successed, due |
| 152 | * to memory is full, which might fail the open function. |
| 153 | */ |
| 154 | if (netif_running(dev)) { |
Dale Farnsworth | ab4384a | 2006-01-16 16:59:21 -0700 | [diff] [blame] | 155 | mv643xx_eth_stop(dev); |
| 156 | if (mv643xx_eth_open(dev)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | printk(KERN_ERR |
| 158 | "%s: Fatal error on opening device\n", |
| 159 | dev->name); |
| 160 | } |
| 161 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | return 0; |
| 163 | } |
| 164 | |
| 165 | /* |
| 166 | * mv643xx_eth_rx_task |
| 167 | * |
| 168 | * Fills / refills RX queue on a certain gigabit ethernet port |
| 169 | * |
| 170 | * Input : pointer to ethernet interface network device structure |
| 171 | * Output : N/A |
| 172 | */ |
| 173 | static void mv643xx_eth_rx_task(void *data) |
| 174 | { |
| 175 | struct net_device *dev = (struct net_device *)data; |
| 176 | struct mv643xx_private *mp = netdev_priv(dev); |
| 177 | struct pkt_info pkt_info; |
| 178 | struct sk_buff *skb; |
Dale Farnsworth | b44cd57 | 2006-01-16 16:51:22 -0700 | [diff] [blame] | 179 | int unaligned; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | |
| 181 | if (test_and_set_bit(0, &mp->rx_task_busy)) |
| 182 | panic("%s: Error in test_set_bit / clear_bit", dev->name); |
| 183 | |
Dale Farnsworth | f98e36f1 | 2006-01-27 01:09:18 -0700 | [diff] [blame] | 184 | while (mp->rx_desc_count < (mp->rx_ring_size - 5)) { |
Dale Farnsworth | b44cd57 | 2006-01-16 16:51:22 -0700 | [diff] [blame] | 185 | skb = dev_alloc_skb(RX_SKB_SIZE + DMA_ALIGN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | if (!skb) |
| 187 | break; |
Dale Farnsworth | f98e36f1 | 2006-01-27 01:09:18 -0700 | [diff] [blame] | 188 | mp->rx_desc_count++; |
Dale Farnsworth | b44cd57 | 2006-01-16 16:51:22 -0700 | [diff] [blame] | 189 | unaligned = (u32)skb->data & (DMA_ALIGN - 1); |
| 190 | if (unaligned) |
| 191 | skb_reserve(skb, DMA_ALIGN - unaligned); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | pkt_info.cmd_sts = ETH_RX_ENABLE_INTERRUPT; |
| 193 | pkt_info.byte_cnt = RX_SKB_SIZE; |
| 194 | pkt_info.buf_ptr = dma_map_single(NULL, skb->data, RX_SKB_SIZE, |
| 195 | DMA_FROM_DEVICE); |
| 196 | pkt_info.return_info = skb; |
| 197 | if (eth_rx_return_buff(mp, &pkt_info) != ETH_OK) { |
| 198 | printk(KERN_ERR |
| 199 | "%s: Error allocating RX Ring\n", dev->name); |
| 200 | break; |
| 201 | } |
Dale Farnsworth | b44cd57 | 2006-01-16 16:51:22 -0700 | [diff] [blame] | 202 | skb_reserve(skb, HW_IP_ALIGN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | } |
| 204 | clear_bit(0, &mp->rx_task_busy); |
| 205 | /* |
| 206 | * If RX ring is empty of SKB, set a timer to try allocating |
| 207 | * again in a later time . |
| 208 | */ |
Dale Farnsworth | f98e36f1 | 2006-01-27 01:09:18 -0700 | [diff] [blame] | 209 | if ((mp->rx_desc_count == 0) && (mp->rx_timer_flag == 0)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | printk(KERN_INFO "%s: Rx ring is empty\n", dev->name); |
| 211 | /* After 100mSec */ |
| 212 | mp->timeout.expires = jiffies + (HZ / 10); |
| 213 | add_timer(&mp->timeout); |
| 214 | mp->rx_timer_flag = 1; |
| 215 | } |
| 216 | #ifdef MV643XX_RX_QUEUE_FILL_ON_TASK |
| 217 | else { |
| 218 | /* Return interrupts */ |
| 219 | mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(mp->port_num), |
Dale Farnsworth | c2e5b35 | 2006-01-16 17:00:24 -0700 | [diff] [blame] | 220 | INT_UNMASK_ALL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | } |
| 222 | #endif |
| 223 | } |
| 224 | |
| 225 | /* |
| 226 | * mv643xx_eth_rx_task_timer_wrapper |
| 227 | * |
| 228 | * Timer routine to wake up RX queue filling task. This function is |
| 229 | * used only in case the RX queue is empty, and all alloc_skb has |
| 230 | * failed (due to out of memory event). |
| 231 | * |
| 232 | * Input : pointer to ethernet interface network device structure |
| 233 | * Output : N/A |
| 234 | */ |
| 235 | static void mv643xx_eth_rx_task_timer_wrapper(unsigned long data) |
| 236 | { |
| 237 | struct net_device *dev = (struct net_device *)data; |
| 238 | struct mv643xx_private *mp = netdev_priv(dev); |
| 239 | |
| 240 | mp->rx_timer_flag = 0; |
| 241 | mv643xx_eth_rx_task((void *)data); |
| 242 | } |
| 243 | |
| 244 | /* |
| 245 | * mv643xx_eth_update_mac_address |
| 246 | * |
| 247 | * Update the MAC address of the port in the address table |
| 248 | * |
| 249 | * Input : pointer to ethernet interface network device structure |
| 250 | * Output : N/A |
| 251 | */ |
| 252 | static void mv643xx_eth_update_mac_address(struct net_device *dev) |
| 253 | { |
| 254 | struct mv643xx_private *mp = netdev_priv(dev); |
| 255 | unsigned int port_num = mp->port_num; |
| 256 | |
| 257 | eth_port_init_mac_tables(port_num); |
Dale Farnsworth | ed9b5d4 | 2006-01-27 01:06:38 -0700 | [diff] [blame] | 258 | eth_port_uc_addr_set(port_num, dev->dev_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | } |
| 260 | |
| 261 | /* |
| 262 | * mv643xx_eth_set_rx_mode |
| 263 | * |
| 264 | * Change from promiscuos to regular rx mode |
| 265 | * |
| 266 | * Input : pointer to ethernet interface network device structure |
| 267 | * Output : N/A |
| 268 | */ |
| 269 | static void mv643xx_eth_set_rx_mode(struct net_device *dev) |
| 270 | { |
| 271 | struct mv643xx_private *mp = netdev_priv(dev); |
Dale Farnsworth | 0199987 | 2006-01-27 01:18:01 -0700 | [diff] [blame] | 272 | u32 config_reg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | |
Dale Farnsworth | 0199987 | 2006-01-27 01:18:01 -0700 | [diff] [blame] | 274 | config_reg = mv_read(MV643XX_ETH_PORT_CONFIG_REG(mp->port_num)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | if (dev->flags & IFF_PROMISC) |
Dale Farnsworth | 0199987 | 2006-01-27 01:18:01 -0700 | [diff] [blame] | 276 | config_reg |= (u32) MV643XX_ETH_UNICAST_PROMISCUOUS_MODE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | else |
Dale Farnsworth | 0199987 | 2006-01-27 01:18:01 -0700 | [diff] [blame] | 278 | config_reg &= ~(u32) MV643XX_ETH_UNICAST_PROMISCUOUS_MODE; |
| 279 | mv_write(MV643XX_ETH_PORT_CONFIG_REG(mp->port_num), config_reg); |
Dale Farnsworth | 16e0301 | 2006-01-16 16:50:02 -0700 | [diff] [blame] | 280 | |
| 281 | eth_port_set_multicast_list(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | } |
| 283 | |
| 284 | /* |
| 285 | * mv643xx_eth_set_mac_address |
| 286 | * |
| 287 | * Change the interface's mac address. |
| 288 | * No special hardware thing should be done because interface is always |
| 289 | * put in promiscuous mode. |
| 290 | * |
| 291 | * Input : pointer to ethernet interface network device structure and |
| 292 | * a pointer to the designated entry to be added to the cache. |
| 293 | * Output : zero upon success, negative upon failure |
| 294 | */ |
| 295 | static int mv643xx_eth_set_mac_address(struct net_device *dev, void *addr) |
| 296 | { |
| 297 | int i; |
| 298 | |
| 299 | for (i = 0; i < 6; i++) |
| 300 | /* +2 is for the offset of the HW addr type */ |
| 301 | dev->dev_addr[i] = ((unsigned char *)addr)[i + 2]; |
| 302 | mv643xx_eth_update_mac_address(dev); |
| 303 | return 0; |
| 304 | } |
| 305 | |
| 306 | /* |
| 307 | * mv643xx_eth_tx_timeout |
| 308 | * |
| 309 | * Called upon a timeout on transmitting a packet |
| 310 | * |
| 311 | * Input : pointer to ethernet interface network device structure. |
| 312 | * Output : N/A |
| 313 | */ |
| 314 | static void mv643xx_eth_tx_timeout(struct net_device *dev) |
| 315 | { |
| 316 | struct mv643xx_private *mp = netdev_priv(dev); |
| 317 | |
| 318 | printk(KERN_INFO "%s: TX timeout ", dev->name); |
| 319 | |
| 320 | /* Do the reset outside of interrupt context */ |
| 321 | schedule_work(&mp->tx_timeout_task); |
| 322 | } |
| 323 | |
| 324 | /* |
| 325 | * mv643xx_eth_tx_timeout_task |
| 326 | * |
| 327 | * Actual routine to reset the adapter when a timeout on Tx has occurred |
| 328 | */ |
| 329 | static void mv643xx_eth_tx_timeout_task(struct net_device *dev) |
| 330 | { |
| 331 | struct mv643xx_private *mp = netdev_priv(dev); |
| 332 | |
| 333 | netif_device_detach(dev); |
| 334 | eth_port_reset(mp->port_num); |
Dale Farnsworth | ed9b5d4 | 2006-01-27 01:06:38 -0700 | [diff] [blame] | 335 | eth_port_start(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | netif_device_attach(dev); |
| 337 | } |
| 338 | |
Dale Farnsworth | ff561ee | 2006-03-03 10:02:51 -0700 | [diff] [blame^] | 339 | /** |
| 340 | * mv643xx_eth_free_tx_descs - Free the tx desc data for completed descriptors |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | * |
Dale Farnsworth | ff561ee | 2006-03-03 10:02:51 -0700 | [diff] [blame^] | 342 | * If force is non-zero, frees uncompleted descriptors as well |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | */ |
Dale Farnsworth | ff561ee | 2006-03-03 10:02:51 -0700 | [diff] [blame^] | 344 | int mv643xx_eth_free_tx_descs(struct net_device *dev, int force) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | { |
| 346 | struct mv643xx_private *mp = netdev_priv(dev); |
Dale Farnsworth | ff561ee | 2006-03-03 10:02:51 -0700 | [diff] [blame^] | 347 | struct eth_tx_desc *desc; |
| 348 | u32 cmd_sts; |
| 349 | struct sk_buff *skb; |
| 350 | unsigned long flags; |
| 351 | int tx_index; |
| 352 | dma_addr_t addr; |
| 353 | int count; |
| 354 | int released = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | |
Dale Farnsworth | ff561ee | 2006-03-03 10:02:51 -0700 | [diff] [blame^] | 356 | while (mp->tx_desc_count > 0) { |
| 357 | spin_lock_irqsave(&mp->lock, flags); |
| 358 | tx_index = mp->tx_used_desc_q; |
| 359 | desc = &mp->p_tx_desc_area[tx_index]; |
| 360 | cmd_sts = desc->cmd_sts; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | |
Dale Farnsworth | ff561ee | 2006-03-03 10:02:51 -0700 | [diff] [blame^] | 362 | if (!force && (cmd_sts & ETH_BUFFER_OWNED_BY_DMA)) { |
| 363 | spin_unlock_irqrestore(&mp->lock, flags); |
| 364 | return released; |
| 365 | } |
| 366 | |
| 367 | mp->tx_used_desc_q = (tx_index + 1) % mp->tx_ring_size; |
| 368 | mp->tx_desc_count--; |
| 369 | |
| 370 | addr = desc->buf_ptr; |
| 371 | count = desc->byte_cnt; |
| 372 | skb = mp->tx_skb[tx_index]; |
| 373 | if (skb) |
| 374 | mp->tx_skb[tx_index] = NULL; |
| 375 | |
| 376 | spin_unlock_irqrestore(&mp->lock, flags); |
| 377 | |
| 378 | if (cmd_sts & BIT0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | printk("%s: Error in TX\n", dev->name); |
Dale Farnsworth | ff561ee | 2006-03-03 10:02:51 -0700 | [diff] [blame^] | 380 | mp->stats.tx_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | } |
| 382 | |
Dale Farnsworth | ff561ee | 2006-03-03 10:02:51 -0700 | [diff] [blame^] | 383 | if (cmd_sts & ETH_TX_FIRST_DESC) |
| 384 | dma_unmap_single(NULL, addr, count, DMA_TO_DEVICE); |
Paolo Galtieri | cb415d3 | 2006-01-16 16:48:02 -0700 | [diff] [blame] | 385 | else |
Dale Farnsworth | ff561ee | 2006-03-03 10:02:51 -0700 | [diff] [blame^] | 386 | dma_unmap_page(NULL, addr, count, DMA_TO_DEVICE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | |
Dale Farnsworth | ff561ee | 2006-03-03 10:02:51 -0700 | [diff] [blame^] | 388 | if (skb) |
| 389 | dev_kfree_skb_irq(skb); |
| 390 | |
| 391 | released = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | } |
| 393 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | return released; |
| 395 | } |
| 396 | |
Dale Farnsworth | ff561ee | 2006-03-03 10:02:51 -0700 | [diff] [blame^] | 397 | static void mv643xx_eth_free_completed_tx_descs(struct net_device *dev) |
| 398 | { |
| 399 | struct mv643xx_private *mp = netdev_priv(dev); |
| 400 | |
| 401 | if (mv643xx_eth_free_tx_descs(dev, 0) && |
| 402 | mp->tx_ring_size - mp->tx_desc_count >= MAX_DESCS_PER_SKB) |
| 403 | netif_wake_queue(dev); |
| 404 | } |
| 405 | |
| 406 | static void mv643xx_eth_free_all_tx_descs(struct net_device *dev) |
| 407 | { |
| 408 | mv643xx_eth_free_tx_descs(dev, 1); |
| 409 | } |
| 410 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | /* |
| 412 | * mv643xx_eth_receive |
| 413 | * |
| 414 | * This function is forward packets that are received from the port's |
| 415 | * queues toward kernel core or FastRoute them to another interface. |
| 416 | * |
| 417 | * Input : dev - a pointer to the required interface |
| 418 | * max - maximum number to receive (0 means unlimted) |
| 419 | * |
| 420 | * Output : number of served packets |
| 421 | */ |
| 422 | #ifdef MV643XX_NAPI |
| 423 | static int mv643xx_eth_receive_queue(struct net_device *dev, int budget) |
| 424 | #else |
| 425 | static int mv643xx_eth_receive_queue(struct net_device *dev) |
| 426 | #endif |
| 427 | { |
| 428 | struct mv643xx_private *mp = netdev_priv(dev); |
| 429 | struct net_device_stats *stats = &mp->stats; |
| 430 | unsigned int received_packets = 0; |
| 431 | struct sk_buff *skb; |
| 432 | struct pkt_info pkt_info; |
| 433 | |
| 434 | #ifdef MV643XX_NAPI |
Dale Farnsworth | b1dd9ca | 2005-09-01 09:59:23 -0700 | [diff] [blame] | 435 | while (budget-- > 0 && eth_port_receive(mp, &pkt_info) == ETH_OK) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | #else |
| 437 | while (eth_port_receive(mp, &pkt_info) == ETH_OK) { |
| 438 | #endif |
Dale Farnsworth | f98e36f1 | 2006-01-27 01:09:18 -0700 | [diff] [blame] | 439 | mp->rx_desc_count--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | received_packets++; |
Dale Farnsworth | b1dd9ca | 2005-09-01 09:59:23 -0700 | [diff] [blame] | 441 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | /* Update statistics. Note byte count includes 4 byte CRC count */ |
| 443 | stats->rx_packets++; |
| 444 | stats->rx_bytes += pkt_info.byte_cnt; |
| 445 | skb = pkt_info.return_info; |
| 446 | /* |
| 447 | * In case received a packet without first / last bits on OR |
| 448 | * the error summary bit is on, the packets needs to be dropeed. |
| 449 | */ |
| 450 | if (((pkt_info.cmd_sts |
| 451 | & (ETH_RX_FIRST_DESC | ETH_RX_LAST_DESC)) != |
| 452 | (ETH_RX_FIRST_DESC | ETH_RX_LAST_DESC)) |
| 453 | || (pkt_info.cmd_sts & ETH_ERROR_SUMMARY)) { |
| 454 | stats->rx_dropped++; |
| 455 | if ((pkt_info.cmd_sts & (ETH_RX_FIRST_DESC | |
| 456 | ETH_RX_LAST_DESC)) != |
| 457 | (ETH_RX_FIRST_DESC | ETH_RX_LAST_DESC)) { |
| 458 | if (net_ratelimit()) |
| 459 | printk(KERN_ERR |
| 460 | "%s: Received packet spread " |
| 461 | "on multiple descriptors\n", |
| 462 | dev->name); |
| 463 | } |
| 464 | if (pkt_info.cmd_sts & ETH_ERROR_SUMMARY) |
| 465 | stats->rx_errors++; |
| 466 | |
| 467 | dev_kfree_skb_irq(skb); |
| 468 | } else { |
| 469 | /* |
| 470 | * The -4 is for the CRC in the trailer of the |
| 471 | * received packet |
| 472 | */ |
| 473 | skb_put(skb, pkt_info.byte_cnt - 4); |
| 474 | skb->dev = dev; |
| 475 | |
| 476 | if (pkt_info.cmd_sts & ETH_LAYER_4_CHECKSUM_OK) { |
| 477 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 478 | skb->csum = htons( |
| 479 | (pkt_info.cmd_sts & 0x0007fff8) >> 3); |
| 480 | } |
| 481 | skb->protocol = eth_type_trans(skb, dev); |
| 482 | #ifdef MV643XX_NAPI |
| 483 | netif_receive_skb(skb); |
| 484 | #else |
| 485 | netif_rx(skb); |
| 486 | #endif |
| 487 | } |
Paolo Galtieri | 12ad74f | 2006-01-27 01:03:38 -0700 | [diff] [blame] | 488 | dev->last_rx = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | } |
| 490 | |
| 491 | return received_packets; |
| 492 | } |
| 493 | |
James Chapman | d0412d9 | 2006-01-27 01:15:30 -0700 | [diff] [blame] | 494 | /* Set the mv643xx port configuration register for the speed/duplex mode. */ |
| 495 | static void mv643xx_eth_update_pscr(struct net_device *dev, |
| 496 | struct ethtool_cmd *ecmd) |
| 497 | { |
| 498 | struct mv643xx_private *mp = netdev_priv(dev); |
| 499 | int port_num = mp->port_num; |
| 500 | u32 o_pscr, n_pscr; |
Dale Farnsworth | 12a87c6 | 2006-03-03 10:00:22 -0700 | [diff] [blame] | 501 | unsigned int queues; |
James Chapman | d0412d9 | 2006-01-27 01:15:30 -0700 | [diff] [blame] | 502 | |
| 503 | o_pscr = mv_read(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num)); |
| 504 | n_pscr = o_pscr; |
| 505 | |
| 506 | /* clear speed, duplex and rx buffer size fields */ |
| 507 | n_pscr &= ~(MV643XX_ETH_SET_MII_SPEED_TO_100 | |
| 508 | MV643XX_ETH_SET_GMII_SPEED_TO_1000 | |
| 509 | MV643XX_ETH_SET_FULL_DUPLEX_MODE | |
| 510 | MV643XX_ETH_MAX_RX_PACKET_MASK); |
| 511 | |
| 512 | if (ecmd->duplex == DUPLEX_FULL) |
| 513 | n_pscr |= MV643XX_ETH_SET_FULL_DUPLEX_MODE; |
| 514 | |
| 515 | if (ecmd->speed == SPEED_1000) |
| 516 | n_pscr |= MV643XX_ETH_SET_GMII_SPEED_TO_1000 | |
| 517 | MV643XX_ETH_MAX_RX_PACKET_9700BYTE; |
| 518 | else { |
| 519 | if (ecmd->speed == SPEED_100) |
| 520 | n_pscr |= MV643XX_ETH_SET_MII_SPEED_TO_100; |
| 521 | n_pscr |= MV643XX_ETH_MAX_RX_PACKET_1522BYTE; |
| 522 | } |
| 523 | |
| 524 | if (n_pscr != o_pscr) { |
| 525 | if ((o_pscr & MV643XX_ETH_SERIAL_PORT_ENABLE) == 0) |
| 526 | mv_write(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num), |
| 527 | n_pscr); |
| 528 | else { |
Dale Farnsworth | 12a87c6 | 2006-03-03 10:00:22 -0700 | [diff] [blame] | 529 | queues = mv643xx_eth_port_disable_tx(port_num); |
James Chapman | d0412d9 | 2006-01-27 01:15:30 -0700 | [diff] [blame] | 530 | |
| 531 | o_pscr &= ~MV643XX_ETH_SERIAL_PORT_ENABLE; |
| 532 | mv_write(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num), |
| 533 | o_pscr); |
| 534 | mv_write(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num), |
| 535 | n_pscr); |
| 536 | mv_write(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num), |
| 537 | n_pscr); |
Dale Farnsworth | 12a87c6 | 2006-03-03 10:00:22 -0700 | [diff] [blame] | 538 | if (queues) |
| 539 | mv643xx_eth_port_enable_tx(port_num, queues); |
James Chapman | d0412d9 | 2006-01-27 01:15:30 -0700 | [diff] [blame] | 540 | } |
| 541 | } |
| 542 | } |
| 543 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | /* |
| 545 | * mv643xx_eth_int_handler |
| 546 | * |
| 547 | * Main interrupt handler for the gigbit ethernet ports |
| 548 | * |
| 549 | * Input : irq - irq number (not used) |
| 550 | * dev_id - a pointer to the required interface's data structure |
| 551 | * regs - not used |
| 552 | * Output : N/A |
| 553 | */ |
| 554 | |
| 555 | static irqreturn_t mv643xx_eth_int_handler(int irq, void *dev_id, |
Dale Farnsworth | b4de905 | 2006-01-27 01:04:43 -0700 | [diff] [blame] | 556 | struct pt_regs *regs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | { |
| 558 | struct net_device *dev = (struct net_device *)dev_id; |
| 559 | struct mv643xx_private *mp = netdev_priv(dev); |
| 560 | u32 eth_int_cause, eth_int_cause_ext = 0; |
| 561 | unsigned int port_num = mp->port_num; |
| 562 | |
| 563 | /* Read interrupt cause registers */ |
| 564 | eth_int_cause = mv_read(MV643XX_ETH_INTERRUPT_CAUSE_REG(port_num)) & |
Dale Farnsworth | c2e5b35 | 2006-01-16 17:00:24 -0700 | [diff] [blame] | 565 | INT_UNMASK_ALL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | |
| 567 | if (eth_int_cause & BIT1) |
| 568 | eth_int_cause_ext = mv_read( |
| 569 | MV643XX_ETH_INTERRUPT_CAUSE_EXTEND_REG(port_num)) & |
Dale Farnsworth | c2e5b35 | 2006-01-16 17:00:24 -0700 | [diff] [blame] | 570 | INT_UNMASK_ALL_EXT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | |
| 572 | #ifdef MV643XX_NAPI |
| 573 | if (!(eth_int_cause & 0x0007fffd)) { |
| 574 | /* Dont ack the Rx interrupt */ |
| 575 | #endif |
| 576 | /* |
| 577 | * Clear specific ethernet port intrerrupt registers by |
| 578 | * acknowleding relevant bits. |
| 579 | */ |
| 580 | mv_write(MV643XX_ETH_INTERRUPT_CAUSE_REG(port_num), |
| 581 | ~eth_int_cause); |
Dale Farnsworth | ff561ee | 2006-03-03 10:02:51 -0700 | [diff] [blame^] | 582 | if (eth_int_cause_ext != 0x0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | mv_write(MV643XX_ETH_INTERRUPT_CAUSE_EXTEND_REG |
| 584 | (port_num), ~eth_int_cause_ext); |
Dale Farnsworth | ff561ee | 2006-03-03 10:02:51 -0700 | [diff] [blame^] | 585 | /* UDP change : We may need this */ |
| 586 | if (eth_int_cause_ext & (BIT0 | BIT8)) |
| 587 | mv643xx_eth_free_completed_tx_descs(dev); |
| 588 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | #ifdef MV643XX_NAPI |
| 590 | } else { |
| 591 | if (netif_rx_schedule_prep(dev)) { |
| 592 | /* Mask all the interrupts */ |
Dale Farnsworth | c2e5b35 | 2006-01-16 17:00:24 -0700 | [diff] [blame] | 593 | mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(port_num), |
| 594 | INT_MASK_ALL); |
| 595 | /* wait for previous write to complete */ |
| 596 | mv_read(MV643XX_ETH_INTERRUPT_MASK_REG(port_num)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | __netif_rx_schedule(dev); |
| 598 | } |
| 599 | #else |
| 600 | if (eth_int_cause & (BIT2 | BIT11)) |
| 601 | mv643xx_eth_receive_queue(dev, 0); |
| 602 | |
| 603 | /* |
| 604 | * After forwarded received packets to upper layer, add a task |
| 605 | * in an interrupts enabled context that refills the RX ring |
| 606 | * with skb's. |
| 607 | */ |
| 608 | #ifdef MV643XX_RX_QUEUE_FILL_ON_TASK |
Dale Farnsworth | c2e5b35 | 2006-01-16 17:00:24 -0700 | [diff] [blame] | 609 | /* Mask all interrupts on ethernet port */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(port_num), |
Dale Farnsworth | c2e5b35 | 2006-01-16 17:00:24 -0700 | [diff] [blame] | 611 | INT_MASK_ALL); |
Dale Farnsworth | 8f51870 | 2006-01-16 16:56:30 -0700 | [diff] [blame] | 612 | /* wait for previous write to take effect */ |
| 613 | mv_read(MV643XX_ETH_INTERRUPT_MASK_REG(port_num)); |
| 614 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | queue_task(&mp->rx_task, &tq_immediate); |
| 616 | mark_bh(IMMEDIATE_BH); |
| 617 | #else |
| 618 | mp->rx_task.func(dev); |
| 619 | #endif |
| 620 | #endif |
| 621 | } |
| 622 | /* PHY status changed */ |
| 623 | if (eth_int_cause_ext & (BIT16 | BIT20)) { |
James Chapman | d0412d9 | 2006-01-27 01:15:30 -0700 | [diff] [blame] | 624 | struct ethtool_cmd cmd; |
| 625 | |
James Chapman | c28a4f8 | 2006-01-27 01:13:15 -0700 | [diff] [blame] | 626 | if (mii_link_ok(&mp->mii)) { |
James Chapman | d0412d9 | 2006-01-27 01:15:30 -0700 | [diff] [blame] | 627 | mii_ethtool_gset(&mp->mii, &cmd); |
| 628 | mv643xx_eth_update_pscr(dev, &cmd); |
Dale Farnsworth | ff561ee | 2006-03-03 10:02:51 -0700 | [diff] [blame^] | 629 | mv643xx_eth_port_enable_tx(port_num, |
| 630 | ETH_TX_QUEUES_ENABLED); |
James Chapman | c28a4f8 | 2006-01-27 01:13:15 -0700 | [diff] [blame] | 631 | if (!netif_carrier_ok(dev)) { |
| 632 | netif_carrier_on(dev); |
Dale Farnsworth | ff561ee | 2006-03-03 10:02:51 -0700 | [diff] [blame^] | 633 | if (mp->tx_ring_size - mp->tx_desc_count >= |
| 634 | MAX_DESCS_PER_SKB) |
James Chapman | d0412d9 | 2006-01-27 01:15:30 -0700 | [diff] [blame] | 635 | netif_wake_queue(dev); |
James Chapman | c28a4f8 | 2006-01-27 01:13:15 -0700 | [diff] [blame] | 636 | } |
| 637 | } else if (netif_carrier_ok(dev)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | netif_stop_queue(dev); |
James Chapman | c28a4f8 | 2006-01-27 01:13:15 -0700 | [diff] [blame] | 639 | netif_carrier_off(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | } |
| 641 | } |
| 642 | |
| 643 | /* |
| 644 | * If no real interrupt occured, exit. |
| 645 | * This can happen when using gigE interrupt coalescing mechanism. |
| 646 | */ |
| 647 | if ((eth_int_cause == 0x0) && (eth_int_cause_ext == 0x0)) |
| 648 | return IRQ_NONE; |
| 649 | |
| 650 | return IRQ_HANDLED; |
| 651 | } |
| 652 | |
| 653 | #ifdef MV643XX_COAL |
| 654 | |
| 655 | /* |
| 656 | * eth_port_set_rx_coal - Sets coalescing interrupt mechanism on RX path |
| 657 | * |
| 658 | * DESCRIPTION: |
| 659 | * This routine sets the RX coalescing interrupt mechanism parameter. |
| 660 | * This parameter is a timeout counter, that counts in 64 t_clk |
| 661 | * chunks ; that when timeout event occurs a maskable interrupt |
| 662 | * occurs. |
| 663 | * The parameter is calculated using the tClk of the MV-643xx chip |
| 664 | * , and the required delay of the interrupt in usec. |
| 665 | * |
| 666 | * INPUT: |
| 667 | * unsigned int eth_port_num Ethernet port number |
| 668 | * unsigned int t_clk t_clk of the MV-643xx chip in HZ units |
| 669 | * unsigned int delay Delay in usec |
| 670 | * |
| 671 | * OUTPUT: |
| 672 | * Interrupt coalescing mechanism value is set in MV-643xx chip. |
| 673 | * |
| 674 | * RETURN: |
| 675 | * The interrupt coalescing value set in the gigE port. |
| 676 | * |
| 677 | */ |
| 678 | static unsigned int eth_port_set_rx_coal(unsigned int eth_port_num, |
| 679 | unsigned int t_clk, unsigned int delay) |
| 680 | { |
| 681 | unsigned int coal = ((t_clk / 1000000) * delay) / 64; |
| 682 | |
| 683 | /* Set RX Coalescing mechanism */ |
| 684 | mv_write(MV643XX_ETH_SDMA_CONFIG_REG(eth_port_num), |
| 685 | ((coal & 0x3fff) << 8) | |
| 686 | (mv_read(MV643XX_ETH_SDMA_CONFIG_REG(eth_port_num)) |
| 687 | & 0xffc000ff)); |
| 688 | |
| 689 | return coal; |
| 690 | } |
| 691 | #endif |
| 692 | |
| 693 | /* |
| 694 | * eth_port_set_tx_coal - Sets coalescing interrupt mechanism on TX path |
| 695 | * |
| 696 | * DESCRIPTION: |
| 697 | * This routine sets the TX coalescing interrupt mechanism parameter. |
| 698 | * This parameter is a timeout counter, that counts in 64 t_clk |
| 699 | * chunks ; that when timeout event occurs a maskable interrupt |
| 700 | * occurs. |
| 701 | * The parameter is calculated using the t_cLK frequency of the |
| 702 | * MV-643xx chip and the required delay in the interrupt in uSec |
| 703 | * |
| 704 | * INPUT: |
| 705 | * unsigned int eth_port_num Ethernet port number |
| 706 | * unsigned int t_clk t_clk of the MV-643xx chip in HZ units |
| 707 | * unsigned int delay Delay in uSeconds |
| 708 | * |
| 709 | * OUTPUT: |
| 710 | * Interrupt coalescing mechanism value is set in MV-643xx chip. |
| 711 | * |
| 712 | * RETURN: |
| 713 | * The interrupt coalescing value set in the gigE port. |
| 714 | * |
| 715 | */ |
| 716 | static unsigned int eth_port_set_tx_coal(unsigned int eth_port_num, |
| 717 | unsigned int t_clk, unsigned int delay) |
| 718 | { |
| 719 | unsigned int coal; |
| 720 | coal = ((t_clk / 1000000) * delay) / 64; |
| 721 | /* Set TX Coalescing mechanism */ |
| 722 | mv_write(MV643XX_ETH_TX_FIFO_URGENT_THRESHOLD_REG(eth_port_num), |
| 723 | coal << 4); |
| 724 | return coal; |
| 725 | } |
| 726 | |
| 727 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | * ether_init_rx_desc_ring - Curve a Rx chain desc list and buffer in memory. |
| 729 | * |
| 730 | * DESCRIPTION: |
| 731 | * This function prepares a Rx chained list of descriptors and packet |
| 732 | * buffers in a form of a ring. The routine must be called after port |
| 733 | * initialization routine and before port start routine. |
| 734 | * The Ethernet SDMA engine uses CPU bus addresses to access the various |
| 735 | * devices in the system (i.e. DRAM). This function uses the ethernet |
| 736 | * struct 'virtual to physical' routine (set by the user) to set the ring |
| 737 | * with physical addresses. |
| 738 | * |
| 739 | * INPUT: |
| 740 | * struct mv643xx_private *mp Ethernet Port Control srtuct. |
| 741 | * |
| 742 | * OUTPUT: |
| 743 | * The routine updates the Ethernet port control struct with information |
| 744 | * regarding the Rx descriptors and buffers. |
| 745 | * |
| 746 | * RETURN: |
| 747 | * None. |
| 748 | */ |
| 749 | static void ether_init_rx_desc_ring(struct mv643xx_private *mp) |
| 750 | { |
| 751 | volatile struct eth_rx_desc *p_rx_desc; |
| 752 | int rx_desc_num = mp->rx_ring_size; |
| 753 | int i; |
| 754 | |
| 755 | /* initialize the next_desc_ptr links in the Rx descriptors ring */ |
| 756 | p_rx_desc = (struct eth_rx_desc *)mp->p_rx_desc_area; |
| 757 | for (i = 0; i < rx_desc_num; i++) { |
| 758 | p_rx_desc[i].next_desc_ptr = mp->rx_desc_dma + |
| 759 | ((i + 1) % rx_desc_num) * sizeof(struct eth_rx_desc); |
| 760 | } |
| 761 | |
| 762 | /* Save Rx desc pointer to driver struct. */ |
| 763 | mp->rx_curr_desc_q = 0; |
| 764 | mp->rx_used_desc_q = 0; |
| 765 | |
| 766 | mp->rx_desc_area_size = rx_desc_num * sizeof(struct eth_rx_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | } |
| 768 | |
| 769 | /* |
| 770 | * ether_init_tx_desc_ring - Curve a Tx chain desc list and buffer in memory. |
| 771 | * |
| 772 | * DESCRIPTION: |
| 773 | * This function prepares a Tx chained list of descriptors and packet |
| 774 | * buffers in a form of a ring. The routine must be called after port |
| 775 | * initialization routine and before port start routine. |
| 776 | * The Ethernet SDMA engine uses CPU bus addresses to access the various |
| 777 | * devices in the system (i.e. DRAM). This function uses the ethernet |
| 778 | * struct 'virtual to physical' routine (set by the user) to set the ring |
| 779 | * with physical addresses. |
| 780 | * |
| 781 | * INPUT: |
| 782 | * struct mv643xx_private *mp Ethernet Port Control srtuct. |
| 783 | * |
| 784 | * OUTPUT: |
| 785 | * The routine updates the Ethernet port control struct with information |
| 786 | * regarding the Tx descriptors and buffers. |
| 787 | * |
| 788 | * RETURN: |
| 789 | * None. |
| 790 | */ |
| 791 | static void ether_init_tx_desc_ring(struct mv643xx_private *mp) |
| 792 | { |
| 793 | int tx_desc_num = mp->tx_ring_size; |
| 794 | struct eth_tx_desc *p_tx_desc; |
| 795 | int i; |
| 796 | |
| 797 | /* Initialize the next_desc_ptr links in the Tx descriptors ring */ |
| 798 | p_tx_desc = (struct eth_tx_desc *)mp->p_tx_desc_area; |
| 799 | for (i = 0; i < tx_desc_num; i++) { |
| 800 | p_tx_desc[i].next_desc_ptr = mp->tx_desc_dma + |
| 801 | ((i + 1) % tx_desc_num) * sizeof(struct eth_tx_desc); |
| 802 | } |
| 803 | |
| 804 | mp->tx_curr_desc_q = 0; |
| 805 | mp->tx_used_desc_q = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | |
| 807 | mp->tx_desc_area_size = tx_desc_num * sizeof(struct eth_tx_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | } |
| 809 | |
James Chapman | d0412d9 | 2006-01-27 01:15:30 -0700 | [diff] [blame] | 810 | static int mv643xx_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) |
| 811 | { |
| 812 | struct mv643xx_private *mp = netdev_priv(dev); |
| 813 | int err; |
| 814 | |
| 815 | spin_lock_irq(&mp->lock); |
| 816 | err = mii_ethtool_sset(&mp->mii, cmd); |
| 817 | spin_unlock_irq(&mp->lock); |
| 818 | |
| 819 | return err; |
| 820 | } |
| 821 | |
| 822 | static int mv643xx_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) |
| 823 | { |
| 824 | struct mv643xx_private *mp = netdev_priv(dev); |
| 825 | int err; |
| 826 | |
| 827 | spin_lock_irq(&mp->lock); |
| 828 | err = mii_ethtool_gset(&mp->mii, cmd); |
| 829 | spin_unlock_irq(&mp->lock); |
| 830 | |
| 831 | /* The PHY may support 1000baseT_Half, but the mv643xx does not */ |
| 832 | cmd->supported &= ~SUPPORTED_1000baseT_Half; |
| 833 | cmd->advertising &= ~ADVERTISED_1000baseT_Half; |
| 834 | |
| 835 | return err; |
| 836 | } |
| 837 | |
Dale Farnsworth | ab4384a | 2006-01-16 16:59:21 -0700 | [diff] [blame] | 838 | /* |
| 839 | * mv643xx_eth_open |
| 840 | * |
| 841 | * This function is called when openning the network device. The function |
| 842 | * should initialize all the hardware, initialize cyclic Rx/Tx |
| 843 | * descriptors chain and buffers and allocate an IRQ to the network |
| 844 | * device. |
| 845 | * |
| 846 | * Input : a pointer to the network device structure |
| 847 | * |
| 848 | * Output : zero of success , nonzero if fails. |
| 849 | */ |
| 850 | |
| 851 | static int mv643xx_eth_open(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 852 | { |
| 853 | struct mv643xx_private *mp = netdev_priv(dev); |
| 854 | unsigned int port_num = mp->port_num; |
| 855 | unsigned int size; |
Dale Farnsworth | ab4384a | 2006-01-16 16:59:21 -0700 | [diff] [blame] | 856 | int err; |
| 857 | |
| 858 | err = request_irq(dev->irq, mv643xx_eth_int_handler, |
| 859 | SA_SHIRQ | SA_SAMPLE_RANDOM, dev->name, dev); |
| 860 | if (err) { |
| 861 | printk(KERN_ERR "Can not assign IRQ number to MV643XX_eth%d\n", |
| 862 | port_num); |
| 863 | return -EAGAIN; |
| 864 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | eth_port_init(mp); |
| 867 | |
| 868 | INIT_WORK(&mp->rx_task, (void (*)(void *))mv643xx_eth_rx_task, dev); |
| 869 | |
| 870 | memset(&mp->timeout, 0, sizeof(struct timer_list)); |
| 871 | mp->timeout.function = mv643xx_eth_rx_task_timer_wrapper; |
| 872 | mp->timeout.data = (unsigned long)dev; |
| 873 | |
| 874 | mp->rx_task_busy = 0; |
| 875 | mp->rx_timer_flag = 0; |
| 876 | |
| 877 | /* Allocate RX and TX skb rings */ |
| 878 | mp->rx_skb = kmalloc(sizeof(*mp->rx_skb) * mp->rx_ring_size, |
| 879 | GFP_KERNEL); |
| 880 | if (!mp->rx_skb) { |
| 881 | printk(KERN_ERR "%s: Cannot allocate Rx skb ring\n", dev->name); |
Dale Farnsworth | ab4384a | 2006-01-16 16:59:21 -0700 | [diff] [blame] | 882 | err = -ENOMEM; |
| 883 | goto out_free_irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | } |
| 885 | mp->tx_skb = kmalloc(sizeof(*mp->tx_skb) * mp->tx_ring_size, |
| 886 | GFP_KERNEL); |
| 887 | if (!mp->tx_skb) { |
| 888 | printk(KERN_ERR "%s: Cannot allocate Tx skb ring\n", dev->name); |
Dale Farnsworth | ab4384a | 2006-01-16 16:59:21 -0700 | [diff] [blame] | 889 | err = -ENOMEM; |
| 890 | goto out_free_rx_skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | } |
| 892 | |
| 893 | /* Allocate TX ring */ |
Dale Farnsworth | f98e36f1 | 2006-01-27 01:09:18 -0700 | [diff] [blame] | 894 | mp->tx_desc_count = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | size = mp->tx_ring_size * sizeof(struct eth_tx_desc); |
| 896 | mp->tx_desc_area_size = size; |
| 897 | |
| 898 | if (mp->tx_sram_size) { |
| 899 | mp->p_tx_desc_area = ioremap(mp->tx_sram_addr, |
| 900 | mp->tx_sram_size); |
| 901 | mp->tx_desc_dma = mp->tx_sram_addr; |
| 902 | } else |
| 903 | mp->p_tx_desc_area = dma_alloc_coherent(NULL, size, |
| 904 | &mp->tx_desc_dma, |
| 905 | GFP_KERNEL); |
| 906 | |
| 907 | if (!mp->p_tx_desc_area) { |
| 908 | printk(KERN_ERR "%s: Cannot allocate Tx Ring (size %d bytes)\n", |
| 909 | dev->name, size); |
Dale Farnsworth | ab4384a | 2006-01-16 16:59:21 -0700 | [diff] [blame] | 910 | err = -ENOMEM; |
| 911 | goto out_free_tx_skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 912 | } |
| 913 | BUG_ON((u32) mp->p_tx_desc_area & 0xf); /* check 16-byte alignment */ |
| 914 | memset((void *)mp->p_tx_desc_area, 0, mp->tx_desc_area_size); |
| 915 | |
| 916 | ether_init_tx_desc_ring(mp); |
| 917 | |
| 918 | /* Allocate RX ring */ |
Dale Farnsworth | f98e36f1 | 2006-01-27 01:09:18 -0700 | [diff] [blame] | 919 | mp->rx_desc_count = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | size = mp->rx_ring_size * sizeof(struct eth_rx_desc); |
| 921 | mp->rx_desc_area_size = size; |
| 922 | |
| 923 | if (mp->rx_sram_size) { |
| 924 | mp->p_rx_desc_area = ioremap(mp->rx_sram_addr, |
| 925 | mp->rx_sram_size); |
| 926 | mp->rx_desc_dma = mp->rx_sram_addr; |
| 927 | } else |
| 928 | mp->p_rx_desc_area = dma_alloc_coherent(NULL, size, |
| 929 | &mp->rx_desc_dma, |
| 930 | GFP_KERNEL); |
| 931 | |
| 932 | if (!mp->p_rx_desc_area) { |
| 933 | printk(KERN_ERR "%s: Cannot allocate Rx ring (size %d bytes)\n", |
| 934 | dev->name, size); |
| 935 | printk(KERN_ERR "%s: Freeing previously allocated TX queues...", |
| 936 | dev->name); |
| 937 | if (mp->rx_sram_size) |
Dale Farnsworth | dd09b1d | 2006-01-16 16:53:15 -0700 | [diff] [blame] | 938 | iounmap(mp->p_tx_desc_area); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | else |
| 940 | dma_free_coherent(NULL, mp->tx_desc_area_size, |
| 941 | mp->p_tx_desc_area, mp->tx_desc_dma); |
Dale Farnsworth | ab4384a | 2006-01-16 16:59:21 -0700 | [diff] [blame] | 942 | err = -ENOMEM; |
| 943 | goto out_free_tx_skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 944 | } |
| 945 | memset((void *)mp->p_rx_desc_area, 0, size); |
| 946 | |
| 947 | ether_init_rx_desc_ring(mp); |
| 948 | |
| 949 | mv643xx_eth_rx_task(dev); /* Fill RX ring with skb's */ |
| 950 | |
James Chapman | d0412d9 | 2006-01-27 01:15:30 -0700 | [diff] [blame] | 951 | /* Clear any pending ethernet port interrupts */ |
| 952 | mv_write(MV643XX_ETH_INTERRUPT_CAUSE_REG(port_num), 0); |
| 953 | mv_write(MV643XX_ETH_INTERRUPT_CAUSE_EXTEND_REG(port_num), 0); |
| 954 | |
Dale Farnsworth | ed9b5d4 | 2006-01-27 01:06:38 -0700 | [diff] [blame] | 955 | eth_port_start(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | |
| 957 | /* Interrupt Coalescing */ |
| 958 | |
| 959 | #ifdef MV643XX_COAL |
| 960 | mp->rx_int_coal = |
| 961 | eth_port_set_rx_coal(port_num, 133000000, MV643XX_RX_COAL); |
| 962 | #endif |
| 963 | |
| 964 | mp->tx_int_coal = |
| 965 | eth_port_set_tx_coal(port_num, 133000000, MV643XX_TX_COAL); |
| 966 | |
Dale Farnsworth | 8f51870 | 2006-01-16 16:56:30 -0700 | [diff] [blame] | 967 | /* Unmask phy and link status changes interrupts */ |
| 968 | mv_write(MV643XX_ETH_INTERRUPT_EXTEND_MASK_REG(port_num), |
Dale Farnsworth | c2e5b35 | 2006-01-16 17:00:24 -0700 | [diff] [blame] | 969 | INT_UNMASK_ALL_EXT); |
Dale Farnsworth | 8f51870 | 2006-01-16 16:56:30 -0700 | [diff] [blame] | 970 | |
| 971 | /* Unmask RX buffer and TX end interrupt */ |
Dale Farnsworth | c2e5b35 | 2006-01-16 17:00:24 -0700 | [diff] [blame] | 972 | mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(port_num), INT_UNMASK_ALL); |
James Chapman | d0412d9 | 2006-01-27 01:15:30 -0700 | [diff] [blame] | 973 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | return 0; |
Dale Farnsworth | ab4384a | 2006-01-16 16:59:21 -0700 | [diff] [blame] | 975 | |
| 976 | out_free_tx_skb: |
| 977 | kfree(mp->tx_skb); |
| 978 | out_free_rx_skb: |
| 979 | kfree(mp->rx_skb); |
| 980 | out_free_irq: |
| 981 | free_irq(dev->irq, dev); |
| 982 | |
| 983 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 984 | } |
| 985 | |
| 986 | static void mv643xx_eth_free_tx_rings(struct net_device *dev) |
| 987 | { |
| 988 | struct mv643xx_private *mp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 989 | |
| 990 | /* Stop Tx Queues */ |
Dale Farnsworth | ff561ee | 2006-03-03 10:02:51 -0700 | [diff] [blame^] | 991 | mv643xx_eth_port_disable_tx(mp->port_num); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | |
Dale Farnsworth | ff561ee | 2006-03-03 10:02:51 -0700 | [diff] [blame^] | 993 | /* Free outstanding skb's on TX ring */ |
| 994 | mv643xx_eth_free_all_tx_descs(dev); |
| 995 | |
| 996 | BUG_ON(mp->tx_used_desc_q != mp->tx_curr_desc_q); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | |
| 998 | /* Free TX ring */ |
| 999 | if (mp->tx_sram_size) |
| 1000 | iounmap(mp->p_tx_desc_area); |
| 1001 | else |
| 1002 | dma_free_coherent(NULL, mp->tx_desc_area_size, |
| 1003 | mp->p_tx_desc_area, mp->tx_desc_dma); |
| 1004 | } |
| 1005 | |
| 1006 | static void mv643xx_eth_free_rx_rings(struct net_device *dev) |
| 1007 | { |
| 1008 | struct mv643xx_private *mp = netdev_priv(dev); |
| 1009 | unsigned int port_num = mp->port_num; |
| 1010 | int curr; |
| 1011 | |
| 1012 | /* Stop RX Queues */ |
Dale Farnsworth | 9f8dd31 | 2006-01-27 01:10:47 -0700 | [diff] [blame] | 1013 | mv643xx_eth_port_disable_rx(port_num); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | |
| 1015 | /* Free preallocated skb's on RX rings */ |
Dale Farnsworth | f98e36f1 | 2006-01-27 01:09:18 -0700 | [diff] [blame] | 1016 | for (curr = 0; mp->rx_desc_count && curr < mp->rx_ring_size; curr++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | if (mp->rx_skb[curr]) { |
| 1018 | dev_kfree_skb(mp->rx_skb[curr]); |
Dale Farnsworth | f98e36f1 | 2006-01-27 01:09:18 -0700 | [diff] [blame] | 1019 | mp->rx_desc_count--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | } |
| 1021 | } |
| 1022 | |
Dale Farnsworth | f98e36f1 | 2006-01-27 01:09:18 -0700 | [diff] [blame] | 1023 | if (mp->rx_desc_count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1024 | printk(KERN_ERR |
| 1025 | "%s: Error in freeing Rx Ring. %d skb's still" |
| 1026 | " stuck in RX Ring - ignoring them\n", dev->name, |
Dale Farnsworth | f98e36f1 | 2006-01-27 01:09:18 -0700 | [diff] [blame] | 1027 | mp->rx_desc_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | /* Free RX ring */ |
| 1029 | if (mp->rx_sram_size) |
| 1030 | iounmap(mp->p_rx_desc_area); |
| 1031 | else |
| 1032 | dma_free_coherent(NULL, mp->rx_desc_area_size, |
| 1033 | mp->p_rx_desc_area, mp->rx_desc_dma); |
| 1034 | } |
| 1035 | |
| 1036 | /* |
| 1037 | * mv643xx_eth_stop |
| 1038 | * |
| 1039 | * This function is used when closing the network device. |
| 1040 | * It updates the hardware, |
| 1041 | * release all memory that holds buffers and descriptors and release the IRQ. |
| 1042 | * Input : a pointer to the device structure |
| 1043 | * Output : zero if success , nonzero if fails |
| 1044 | */ |
| 1045 | |
Dale Farnsworth | ab4384a | 2006-01-16 16:59:21 -0700 | [diff] [blame] | 1046 | static int mv643xx_eth_stop(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | { |
| 1048 | struct mv643xx_private *mp = netdev_priv(dev); |
| 1049 | unsigned int port_num = mp->port_num; |
| 1050 | |
Dale Farnsworth | c2e5b35 | 2006-01-16 17:00:24 -0700 | [diff] [blame] | 1051 | /* Mask all interrupts on ethernet port */ |
| 1052 | mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(port_num), INT_MASK_ALL); |
| 1053 | /* wait for previous write to complete */ |
Dale Farnsworth | 8f51870 | 2006-01-16 16:56:30 -0700 | [diff] [blame] | 1054 | mv_read(MV643XX_ETH_INTERRUPT_MASK_REG(port_num)); |
| 1055 | |
| 1056 | #ifdef MV643XX_NAPI |
| 1057 | netif_poll_disable(dev); |
| 1058 | #endif |
| 1059 | netif_carrier_off(dev); |
| 1060 | netif_stop_queue(dev); |
| 1061 | |
| 1062 | eth_port_reset(mp->port_num); |
| 1063 | |
| 1064 | mv643xx_eth_free_tx_rings(dev); |
| 1065 | mv643xx_eth_free_rx_rings(dev); |
| 1066 | |
| 1067 | #ifdef MV643XX_NAPI |
| 1068 | netif_poll_enable(dev); |
| 1069 | #endif |
| 1070 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | free_irq(dev->irq, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1072 | |
| 1073 | return 0; |
| 1074 | } |
| 1075 | |
| 1076 | #ifdef MV643XX_NAPI |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | /* |
| 1078 | * mv643xx_poll |
| 1079 | * |
| 1080 | * This function is used in case of NAPI |
| 1081 | */ |
| 1082 | static int mv643xx_poll(struct net_device *dev, int *budget) |
| 1083 | { |
| 1084 | struct mv643xx_private *mp = netdev_priv(dev); |
| 1085 | int done = 1, orig_budget, work_done; |
| 1086 | unsigned int port_num = mp->port_num; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1087 | |
| 1088 | #ifdef MV643XX_TX_FAST_REFILL |
| 1089 | if (++mp->tx_clean_threshold > 5) { |
Dale Farnsworth | ff561ee | 2006-03-03 10:02:51 -0700 | [diff] [blame^] | 1090 | mv643xx_eth_free_completed_tx_descs(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | mp->tx_clean_threshold = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1092 | } |
| 1093 | #endif |
| 1094 | |
| 1095 | if ((mv_read(MV643XX_ETH_RX_CURRENT_QUEUE_DESC_PTR_0(port_num))) |
| 1096 | != (u32) mp->rx_used_desc_q) { |
| 1097 | orig_budget = *budget; |
| 1098 | if (orig_budget > dev->quota) |
| 1099 | orig_budget = dev->quota; |
| 1100 | work_done = mv643xx_eth_receive_queue(dev, orig_budget); |
| 1101 | mp->rx_task.func(dev); |
| 1102 | *budget -= work_done; |
| 1103 | dev->quota -= work_done; |
| 1104 | if (work_done >= orig_budget) |
| 1105 | done = 0; |
| 1106 | } |
| 1107 | |
| 1108 | if (done) { |
Dale Farnsworth | 8f51870 | 2006-01-16 16:56:30 -0700 | [diff] [blame] | 1109 | netif_rx_complete(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | mv_write(MV643XX_ETH_INTERRUPT_CAUSE_REG(port_num), 0); |
| 1111 | mv_write(MV643XX_ETH_INTERRUPT_CAUSE_EXTEND_REG(port_num), 0); |
| 1112 | mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(port_num), |
Dale Farnsworth | c2e5b35 | 2006-01-16 17:00:24 -0700 | [diff] [blame] | 1113 | INT_UNMASK_ALL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | } |
| 1115 | |
| 1116 | return done ? 0 : 1; |
| 1117 | } |
| 1118 | #endif |
| 1119 | |
Dale Farnsworth | c8aaea2 | 2006-03-03 10:02:05 -0700 | [diff] [blame] | 1120 | /** |
| 1121 | * has_tiny_unaligned_frags - check if skb has any small, unaligned fragments |
| 1122 | * |
| 1123 | * Hardware can't handle unaligned fragments smaller than 9 bytes. |
Paul Janzen | f7ea333 | 2006-01-16 16:52:13 -0700 | [diff] [blame] | 1124 | * This helper function detects that case. |
| 1125 | */ |
| 1126 | |
| 1127 | static inline unsigned int has_tiny_unaligned_frags(struct sk_buff *skb) |
| 1128 | { |
Dale Farnsworth | b4de905 | 2006-01-27 01:04:43 -0700 | [diff] [blame] | 1129 | unsigned int frag; |
| 1130 | skb_frag_t *fragp; |
Paul Janzen | f7ea333 | 2006-01-16 16:52:13 -0700 | [diff] [blame] | 1131 | |
Dale Farnsworth | b4de905 | 2006-01-27 01:04:43 -0700 | [diff] [blame] | 1132 | for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) { |
| 1133 | fragp = &skb_shinfo(skb)->frags[frag]; |
| 1134 | if (fragp->size <= 8 && fragp->page_offset & 0x7) |
| 1135 | return 1; |
| 1136 | } |
| 1137 | return 0; |
Paul Janzen | f7ea333 | 2006-01-16 16:52:13 -0700 | [diff] [blame] | 1138 | } |
| 1139 | |
Dale Farnsworth | c8aaea2 | 2006-03-03 10:02:05 -0700 | [diff] [blame] | 1140 | /** |
| 1141 | * eth_alloc_tx_desc_index - return the index of the next available tx desc |
| 1142 | */ |
| 1143 | static int eth_alloc_tx_desc_index(struct mv643xx_private *mp) |
| 1144 | { |
| 1145 | int tx_desc_curr; |
Paul Janzen | f7ea333 | 2006-01-16 16:52:13 -0700 | [diff] [blame] | 1146 | |
Dale Farnsworth | c8aaea2 | 2006-03-03 10:02:05 -0700 | [diff] [blame] | 1147 | BUG_ON(mp->tx_desc_count >= mp->tx_ring_size); |
Dale Farnsworth | c8aaea2 | 2006-03-03 10:02:05 -0700 | [diff] [blame] | 1148 | |
Dale Farnsworth | ff561ee | 2006-03-03 10:02:51 -0700 | [diff] [blame^] | 1149 | tx_desc_curr = mp->tx_curr_desc_q; |
Dale Farnsworth | c8aaea2 | 2006-03-03 10:02:05 -0700 | [diff] [blame] | 1150 | mp->tx_curr_desc_q = (tx_desc_curr + 1) % mp->tx_ring_size; |
| 1151 | |
| 1152 | BUG_ON(mp->tx_curr_desc_q == mp->tx_used_desc_q); |
| 1153 | |
| 1154 | return tx_desc_curr; |
| 1155 | } |
| 1156 | |
| 1157 | /** |
| 1158 | * eth_tx_fill_frag_descs - fill tx hw descriptors for an skb's fragments. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1159 | * |
Dale Farnsworth | c8aaea2 | 2006-03-03 10:02:05 -0700 | [diff] [blame] | 1160 | * Ensure the data for each fragment to be transmitted is mapped properly, |
| 1161 | * then fill in descriptors in the tx hw queue. |
| 1162 | */ |
| 1163 | static void eth_tx_fill_frag_descs(struct mv643xx_private *mp, |
| 1164 | struct sk_buff *skb) |
| 1165 | { |
| 1166 | int frag; |
| 1167 | int tx_index; |
| 1168 | struct eth_tx_desc *desc; |
Dale Farnsworth | c8aaea2 | 2006-03-03 10:02:05 -0700 | [diff] [blame] | 1169 | |
| 1170 | for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) { |
| 1171 | skb_frag_t *this_frag = &skb_shinfo(skb)->frags[frag]; |
| 1172 | |
| 1173 | tx_index = eth_alloc_tx_desc_index(mp); |
| 1174 | desc = &mp->p_tx_desc_area[tx_index]; |
| 1175 | |
| 1176 | desc->cmd_sts = ETH_BUFFER_OWNED_BY_DMA; |
| 1177 | /* Last Frag enables interrupt and frees the skb */ |
| 1178 | if (frag == (skb_shinfo(skb)->nr_frags - 1)) { |
| 1179 | desc->cmd_sts |= ETH_ZERO_PADDING | |
| 1180 | ETH_TX_LAST_DESC | |
| 1181 | ETH_TX_ENABLE_INTERRUPT; |
| 1182 | mp->tx_skb[tx_index] = skb; |
| 1183 | } else |
| 1184 | mp->tx_skb[tx_index] = 0; |
| 1185 | |
| 1186 | desc = &mp->p_tx_desc_area[tx_index]; |
| 1187 | desc->l4i_chk = 0; |
| 1188 | desc->byte_cnt = this_frag->size; |
| 1189 | desc->buf_ptr = dma_map_page(NULL, this_frag->page, |
| 1190 | this_frag->page_offset, |
| 1191 | this_frag->size, |
| 1192 | DMA_TO_DEVICE); |
Dale Farnsworth | c8aaea2 | 2006-03-03 10:02:05 -0700 | [diff] [blame] | 1193 | } |
| 1194 | } |
| 1195 | |
| 1196 | /** |
| 1197 | * eth_tx_submit_descs_for_skb - submit data from an skb to the tx hw |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | * |
Dale Farnsworth | c8aaea2 | 2006-03-03 10:02:05 -0700 | [diff] [blame] | 1199 | * Ensure the data for an skb to be transmitted is mapped properly, |
| 1200 | * then fill in descriptors in the tx hw queue and start the hardware. |
| 1201 | */ |
Dale Farnsworth | ff561ee | 2006-03-03 10:02:51 -0700 | [diff] [blame^] | 1202 | static void eth_tx_submit_descs_for_skb(struct mv643xx_private *mp, |
| 1203 | struct sk_buff *skb) |
Dale Farnsworth | c8aaea2 | 2006-03-03 10:02:05 -0700 | [diff] [blame] | 1204 | { |
| 1205 | int tx_index; |
| 1206 | struct eth_tx_desc *desc; |
| 1207 | u32 cmd_sts; |
| 1208 | int length; |
Dale Farnsworth | ff561ee | 2006-03-03 10:02:51 -0700 | [diff] [blame^] | 1209 | int nr_frags = skb_shinfo(skb)->nr_frags; |
Dale Farnsworth | c8aaea2 | 2006-03-03 10:02:05 -0700 | [diff] [blame] | 1210 | |
| 1211 | cmd_sts = ETH_TX_FIRST_DESC | ETH_GEN_CRC | ETH_BUFFER_OWNED_BY_DMA; |
| 1212 | |
| 1213 | tx_index = eth_alloc_tx_desc_index(mp); |
| 1214 | desc = &mp->p_tx_desc_area[tx_index]; |
| 1215 | |
Dale Farnsworth | ff561ee | 2006-03-03 10:02:51 -0700 | [diff] [blame^] | 1216 | if (nr_frags) { |
Dale Farnsworth | c8aaea2 | 2006-03-03 10:02:05 -0700 | [diff] [blame] | 1217 | eth_tx_fill_frag_descs(mp, skb); |
| 1218 | |
| 1219 | length = skb_headlen(skb); |
| 1220 | mp->tx_skb[tx_index] = 0; |
| 1221 | } else { |
| 1222 | cmd_sts |= ETH_ZERO_PADDING | |
| 1223 | ETH_TX_LAST_DESC | |
| 1224 | ETH_TX_ENABLE_INTERRUPT; |
| 1225 | length = skb->len; |
| 1226 | mp->tx_skb[tx_index] = skb; |
| 1227 | } |
| 1228 | |
| 1229 | desc->byte_cnt = length; |
| 1230 | desc->buf_ptr = dma_map_single(NULL, skb->data, length, DMA_TO_DEVICE); |
Dale Farnsworth | c8aaea2 | 2006-03-03 10:02:05 -0700 | [diff] [blame] | 1231 | |
| 1232 | if (skb->ip_summed == CHECKSUM_HW) { |
| 1233 | BUG_ON(skb->protocol != ETH_P_IP); |
| 1234 | |
| 1235 | cmd_sts |= ETH_GEN_TCP_UDP_CHECKSUM | |
| 1236 | ETH_GEN_IP_V_4_CHECKSUM | |
| 1237 | skb->nh.iph->ihl << ETH_TX_IHL_SHIFT; |
| 1238 | |
| 1239 | switch (skb->nh.iph->protocol) { |
| 1240 | case IPPROTO_UDP: |
| 1241 | cmd_sts |= ETH_UDP_FRAME; |
| 1242 | desc->l4i_chk = skb->h.uh->check; |
| 1243 | break; |
| 1244 | case IPPROTO_TCP: |
| 1245 | desc->l4i_chk = skb->h.th->check; |
| 1246 | break; |
| 1247 | default: |
| 1248 | BUG(); |
| 1249 | } |
| 1250 | } else { |
| 1251 | /* Errata BTS #50, IHL must be 5 if no HW checksum */ |
| 1252 | cmd_sts |= 5 << ETH_TX_IHL_SHIFT; |
| 1253 | desc->l4i_chk = 0; |
| 1254 | } |
| 1255 | |
| 1256 | /* ensure all other descriptors are written before first cmd_sts */ |
| 1257 | wmb(); |
| 1258 | desc->cmd_sts = cmd_sts; |
| 1259 | |
| 1260 | /* ensure all descriptors are written before poking hardware */ |
| 1261 | wmb(); |
Dale Farnsworth | ff561ee | 2006-03-03 10:02:51 -0700 | [diff] [blame^] | 1262 | mv643xx_eth_port_enable_tx(mp->port_num, ETH_TX_QUEUES_ENABLED); |
Dale Farnsworth | c8aaea2 | 2006-03-03 10:02:05 -0700 | [diff] [blame] | 1263 | |
Dale Farnsworth | ff561ee | 2006-03-03 10:02:51 -0700 | [diff] [blame^] | 1264 | mp->tx_desc_count += nr_frags + 1; |
Dale Farnsworth | c8aaea2 | 2006-03-03 10:02:05 -0700 | [diff] [blame] | 1265 | } |
| 1266 | |
| 1267 | /** |
| 1268 | * mv643xx_eth_start_xmit - queue an skb to the hardware for transmission |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1269 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1270 | */ |
| 1271 | static int mv643xx_eth_start_xmit(struct sk_buff *skb, struct net_device *dev) |
| 1272 | { |
| 1273 | struct mv643xx_private *mp = netdev_priv(dev); |
| 1274 | struct net_device_stats *stats = &mp->stats; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1275 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1276 | |
Dale Farnsworth | c8aaea2 | 2006-03-03 10:02:05 -0700 | [diff] [blame] | 1277 | BUG_ON(netif_queue_stopped(dev)); |
| 1278 | BUG_ON(skb == NULL); |
| 1279 | BUG_ON(mp->tx_ring_size - mp->tx_desc_count < MAX_DESCS_PER_SKB); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1280 | |
Paul Janzen | f7ea333 | 2006-01-16 16:52:13 -0700 | [diff] [blame] | 1281 | if (has_tiny_unaligned_frags(skb)) { |
| 1282 | if ((skb_linearize(skb, GFP_ATOMIC) != 0)) { |
| 1283 | stats->tx_dropped++; |
| 1284 | printk(KERN_DEBUG "%s: failed to linearize tiny " |
| 1285 | "unaligned fragment\n", dev->name); |
| 1286 | return 1; |
| 1287 | } |
| 1288 | } |
| 1289 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1290 | spin_lock_irqsave(&mp->lock, flags); |
| 1291 | |
Dale Farnsworth | ff561ee | 2006-03-03 10:02:51 -0700 | [diff] [blame^] | 1292 | eth_tx_submit_descs_for_skb(mp, skb); |
| 1293 | stats->tx_bytes = skb->len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1294 | stats->tx_packets++; |
| 1295 | dev->trans_start = jiffies; |
| 1296 | |
Dale Farnsworth | c8aaea2 | 2006-03-03 10:02:05 -0700 | [diff] [blame] | 1297 | if (mp->tx_ring_size - mp->tx_desc_count < MAX_DESCS_PER_SKB) |
| 1298 | netif_stop_queue(dev); |
| 1299 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1300 | spin_unlock_irqrestore(&mp->lock, flags); |
| 1301 | |
| 1302 | return 0; /* success */ |
| 1303 | } |
| 1304 | |
| 1305 | /* |
| 1306 | * mv643xx_eth_get_stats |
| 1307 | * |
| 1308 | * Returns a pointer to the interface statistics. |
| 1309 | * |
| 1310 | * Input : dev - a pointer to the required interface |
| 1311 | * |
| 1312 | * Output : a pointer to the interface's statistics |
| 1313 | */ |
| 1314 | |
| 1315 | static struct net_device_stats *mv643xx_eth_get_stats(struct net_device *dev) |
| 1316 | { |
| 1317 | struct mv643xx_private *mp = netdev_priv(dev); |
| 1318 | |
| 1319 | return &mp->stats; |
| 1320 | } |
| 1321 | |
Dale Farnsworth | 63c9e54 | 2005-09-02 13:49:10 -0700 | [diff] [blame] | 1322 | #ifdef CONFIG_NET_POLL_CONTROLLER |
Dale Farnsworth | 63c9e54 | 2005-09-02 13:49:10 -0700 | [diff] [blame] | 1323 | static void mv643xx_netpoll(struct net_device *netdev) |
| 1324 | { |
| 1325 | struct mv643xx_private *mp = netdev_priv(netdev); |
Dale Farnsworth | c2e5b35 | 2006-01-16 17:00:24 -0700 | [diff] [blame] | 1326 | int port_num = mp->port_num; |
Dale Farnsworth | 63c9e54 | 2005-09-02 13:49:10 -0700 | [diff] [blame] | 1327 | |
Dale Farnsworth | c2e5b35 | 2006-01-16 17:00:24 -0700 | [diff] [blame] | 1328 | mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(port_num), INT_MASK_ALL); |
| 1329 | /* wait for previous write to complete */ |
| 1330 | mv_read(MV643XX_ETH_INTERRUPT_MASK_REG(port_num)); |
| 1331 | |
Dale Farnsworth | 63c9e54 | 2005-09-02 13:49:10 -0700 | [diff] [blame] | 1332 | mv643xx_eth_int_handler(netdev->irq, netdev, NULL); |
Dale Farnsworth | c2e5b35 | 2006-01-16 17:00:24 -0700 | [diff] [blame] | 1333 | |
| 1334 | mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(port_num), INT_UNMASK_ALL); |
Dale Farnsworth | 63c9e54 | 2005-09-02 13:49:10 -0700 | [diff] [blame] | 1335 | } |
| 1336 | #endif |
| 1337 | |
James Chapman | d0412d9 | 2006-01-27 01:15:30 -0700 | [diff] [blame] | 1338 | static void mv643xx_init_ethtool_cmd(struct net_device *dev, int phy_address, |
| 1339 | int speed, int duplex, |
| 1340 | struct ethtool_cmd *cmd) |
| 1341 | { |
| 1342 | struct mv643xx_private *mp = netdev_priv(dev); |
| 1343 | |
| 1344 | memset(cmd, 0, sizeof(*cmd)); |
| 1345 | |
| 1346 | cmd->port = PORT_MII; |
| 1347 | cmd->transceiver = XCVR_INTERNAL; |
| 1348 | cmd->phy_address = phy_address; |
| 1349 | |
| 1350 | if (speed == 0) { |
| 1351 | cmd->autoneg = AUTONEG_ENABLE; |
| 1352 | /* mii lib checks, but doesn't use speed on AUTONEG_ENABLE */ |
| 1353 | cmd->speed = SPEED_100; |
| 1354 | cmd->advertising = ADVERTISED_10baseT_Half | |
| 1355 | ADVERTISED_10baseT_Full | |
| 1356 | ADVERTISED_100baseT_Half | |
| 1357 | ADVERTISED_100baseT_Full; |
| 1358 | if (mp->mii.supports_gmii) |
| 1359 | cmd->advertising |= ADVERTISED_1000baseT_Full; |
| 1360 | } else { |
| 1361 | cmd->autoneg = AUTONEG_DISABLE; |
| 1362 | cmd->speed = speed; |
| 1363 | cmd->duplex = duplex; |
| 1364 | } |
| 1365 | } |
| 1366 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1367 | /*/ |
| 1368 | * mv643xx_eth_probe |
| 1369 | * |
| 1370 | * First function called after registering the network device. |
| 1371 | * It's purpose is to initialize the device as an ethernet device, |
| 1372 | * fill the ethernet device structure with pointers * to functions, |
| 1373 | * and set the MAC address of the interface |
| 1374 | * |
| 1375 | * Input : struct device * |
| 1376 | * Output : -ENOMEM if failed , 0 if success |
| 1377 | */ |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1378 | static int mv643xx_eth_probe(struct platform_device *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1379 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1380 | struct mv643xx_eth_platform_data *pd; |
| 1381 | int port_num = pdev->id; |
| 1382 | struct mv643xx_private *mp; |
| 1383 | struct net_device *dev; |
| 1384 | u8 *p; |
| 1385 | struct resource *res; |
| 1386 | int err; |
James Chapman | d0412d9 | 2006-01-27 01:15:30 -0700 | [diff] [blame] | 1387 | struct ethtool_cmd cmd; |
Dale Farnsworth | 0199987 | 2006-01-27 01:18:01 -0700 | [diff] [blame] | 1388 | int duplex = DUPLEX_HALF; |
| 1389 | int speed = 0; /* default to auto-negotiation */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1390 | |
| 1391 | dev = alloc_etherdev(sizeof(struct mv643xx_private)); |
| 1392 | if (!dev) |
| 1393 | return -ENOMEM; |
| 1394 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1395 | platform_set_drvdata(pdev, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1396 | |
| 1397 | mp = netdev_priv(dev); |
| 1398 | |
| 1399 | res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); |
| 1400 | BUG_ON(!res); |
| 1401 | dev->irq = res->start; |
| 1402 | |
| 1403 | mp->port_num = port_num; |
| 1404 | |
| 1405 | dev->open = mv643xx_eth_open; |
| 1406 | dev->stop = mv643xx_eth_stop; |
| 1407 | dev->hard_start_xmit = mv643xx_eth_start_xmit; |
| 1408 | dev->get_stats = mv643xx_eth_get_stats; |
| 1409 | dev->set_mac_address = mv643xx_eth_set_mac_address; |
| 1410 | dev->set_multicast_list = mv643xx_eth_set_rx_mode; |
| 1411 | |
| 1412 | /* No need to Tx Timeout */ |
| 1413 | dev->tx_timeout = mv643xx_eth_tx_timeout; |
| 1414 | #ifdef MV643XX_NAPI |
| 1415 | dev->poll = mv643xx_poll; |
| 1416 | dev->weight = 64; |
| 1417 | #endif |
| 1418 | |
Dale Farnsworth | 63c9e54 | 2005-09-02 13:49:10 -0700 | [diff] [blame] | 1419 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 1420 | dev->poll_controller = mv643xx_netpoll; |
| 1421 | #endif |
| 1422 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1423 | dev->watchdog_timeo = 2 * HZ; |
| 1424 | dev->tx_queue_len = mp->tx_ring_size; |
| 1425 | dev->base_addr = 0; |
| 1426 | dev->change_mtu = mv643xx_eth_change_mtu; |
James Chapman | d0412d9 | 2006-01-27 01:15:30 -0700 | [diff] [blame] | 1427 | dev->do_ioctl = mv643xx_eth_do_ioctl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1428 | SET_ETHTOOL_OPS(dev, &mv643xx_ethtool_ops); |
| 1429 | |
| 1430 | #ifdef MV643XX_CHECKSUM_OFFLOAD_TX |
| 1431 | #ifdef MAX_SKB_FRAGS |
| 1432 | /* |
| 1433 | * Zero copy can only work if we use Discovery II memory. Else, we will |
| 1434 | * have to map the buffers to ISA memory which is only 16 MB |
| 1435 | */ |
Wolfram Joost | 6389057 | 2006-01-16 16:57:41 -0700 | [diff] [blame] | 1436 | dev->features = NETIF_F_SG | NETIF_F_IP_CSUM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1437 | #endif |
| 1438 | #endif |
| 1439 | |
| 1440 | /* Configure the timeout task */ |
| 1441 | INIT_WORK(&mp->tx_timeout_task, |
| 1442 | (void (*)(void *))mv643xx_eth_tx_timeout_task, dev); |
| 1443 | |
| 1444 | spin_lock_init(&mp->lock); |
| 1445 | |
| 1446 | /* set default config values */ |
| 1447 | eth_port_uc_addr_get(dev, dev->dev_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1448 | mp->rx_ring_size = MV643XX_ETH_PORT_DEFAULT_RECEIVE_QUEUE_SIZE; |
| 1449 | mp->tx_ring_size = MV643XX_ETH_PORT_DEFAULT_TRANSMIT_QUEUE_SIZE; |
| 1450 | |
| 1451 | pd = pdev->dev.platform_data; |
| 1452 | if (pd) { |
Dale Farnsworth | 0199987 | 2006-01-27 01:18:01 -0700 | [diff] [blame] | 1453 | if (pd->mac_addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1454 | memcpy(dev->dev_addr, pd->mac_addr, 6); |
| 1455 | |
| 1456 | if (pd->phy_addr || pd->force_phy_addr) |
| 1457 | ethernet_phy_set(port_num, pd->phy_addr); |
| 1458 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1459 | if (pd->rx_queue_size) |
| 1460 | mp->rx_ring_size = pd->rx_queue_size; |
| 1461 | |
| 1462 | if (pd->tx_queue_size) |
| 1463 | mp->tx_ring_size = pd->tx_queue_size; |
| 1464 | |
| 1465 | if (pd->tx_sram_size) { |
| 1466 | mp->tx_sram_size = pd->tx_sram_size; |
| 1467 | mp->tx_sram_addr = pd->tx_sram_addr; |
| 1468 | } |
| 1469 | |
| 1470 | if (pd->rx_sram_size) { |
| 1471 | mp->rx_sram_size = pd->rx_sram_size; |
| 1472 | mp->rx_sram_addr = pd->rx_sram_addr; |
| 1473 | } |
Dale Farnsworth | 0199987 | 2006-01-27 01:18:01 -0700 | [diff] [blame] | 1474 | |
| 1475 | duplex = pd->duplex; |
| 1476 | speed = pd->speed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1477 | } |
| 1478 | |
James Chapman | c28a4f8 | 2006-01-27 01:13:15 -0700 | [diff] [blame] | 1479 | /* Hook up MII support for ethtool */ |
| 1480 | mp->mii.dev = dev; |
| 1481 | mp->mii.mdio_read = mv643xx_mdio_read; |
| 1482 | mp->mii.mdio_write = mv643xx_mdio_write; |
| 1483 | mp->mii.phy_id = ethernet_phy_get(port_num); |
| 1484 | mp->mii.phy_id_mask = 0x3f; |
| 1485 | mp->mii.reg_num_mask = 0x1f; |
| 1486 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1487 | err = ethernet_phy_detect(port_num); |
| 1488 | if (err) { |
| 1489 | pr_debug("MV643xx ethernet port %d: " |
| 1490 | "No PHY detected at addr %d\n", |
| 1491 | port_num, ethernet_phy_get(port_num)); |
James Chapman | d0412d9 | 2006-01-27 01:15:30 -0700 | [diff] [blame] | 1492 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1493 | } |
| 1494 | |
Dale Farnsworth | 0199987 | 2006-01-27 01:18:01 -0700 | [diff] [blame] | 1495 | ethernet_phy_reset(port_num); |
James Chapman | c28a4f8 | 2006-01-27 01:13:15 -0700 | [diff] [blame] | 1496 | mp->mii.supports_gmii = mii_check_gmii_support(&mp->mii); |
James Chapman | d0412d9 | 2006-01-27 01:15:30 -0700 | [diff] [blame] | 1497 | mv643xx_init_ethtool_cmd(dev, mp->mii.phy_id, speed, duplex, &cmd); |
| 1498 | mv643xx_eth_update_pscr(dev, &cmd); |
| 1499 | mv643xx_set_settings(dev, &cmd); |
James Chapman | c28a4f8 | 2006-01-27 01:13:15 -0700 | [diff] [blame] | 1500 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1501 | err = register_netdev(dev); |
| 1502 | if (err) |
| 1503 | goto out; |
| 1504 | |
| 1505 | p = dev->dev_addr; |
| 1506 | printk(KERN_NOTICE |
| 1507 | "%s: port %d with MAC address %02x:%02x:%02x:%02x:%02x:%02x\n", |
| 1508 | dev->name, port_num, p[0], p[1], p[2], p[3], p[4], p[5]); |
| 1509 | |
| 1510 | if (dev->features & NETIF_F_SG) |
| 1511 | printk(KERN_NOTICE "%s: Scatter Gather Enabled\n", dev->name); |
| 1512 | |
| 1513 | if (dev->features & NETIF_F_IP_CSUM) |
| 1514 | printk(KERN_NOTICE "%s: TX TCP/IP Checksumming Supported\n", |
| 1515 | dev->name); |
| 1516 | |
| 1517 | #ifdef MV643XX_CHECKSUM_OFFLOAD_TX |
| 1518 | printk(KERN_NOTICE "%s: RX TCP/UDP Checksum Offload ON \n", dev->name); |
| 1519 | #endif |
| 1520 | |
| 1521 | #ifdef MV643XX_COAL |
| 1522 | printk(KERN_NOTICE "%s: TX and RX Interrupt Coalescing ON \n", |
| 1523 | dev->name); |
| 1524 | #endif |
| 1525 | |
| 1526 | #ifdef MV643XX_NAPI |
| 1527 | printk(KERN_NOTICE "%s: RX NAPI Enabled \n", dev->name); |
| 1528 | #endif |
| 1529 | |
Nicolas DET | b152987 | 2005-10-28 17:46:30 -0700 | [diff] [blame] | 1530 | if (mp->tx_sram_size > 0) |
| 1531 | printk(KERN_NOTICE "%s: Using SRAM\n", dev->name); |
| 1532 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1533 | return 0; |
| 1534 | |
| 1535 | out: |
| 1536 | free_netdev(dev); |
| 1537 | |
| 1538 | return err; |
| 1539 | } |
| 1540 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1541 | static int mv643xx_eth_remove(struct platform_device *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1542 | { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1543 | struct net_device *dev = platform_get_drvdata(pdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1544 | |
| 1545 | unregister_netdev(dev); |
| 1546 | flush_scheduled_work(); |
| 1547 | |
| 1548 | free_netdev(dev); |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1549 | platform_set_drvdata(pdev, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1550 | return 0; |
| 1551 | } |
| 1552 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1553 | static int mv643xx_eth_shared_probe(struct platform_device *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1554 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1555 | struct resource *res; |
| 1556 | |
| 1557 | printk(KERN_NOTICE "MV-643xx 10/100/1000 Ethernet Driver\n"); |
| 1558 | |
| 1559 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 1560 | if (res == NULL) |
| 1561 | return -ENODEV; |
| 1562 | |
| 1563 | mv643xx_eth_shared_base = ioremap(res->start, |
| 1564 | MV643XX_ETH_SHARED_REGS_SIZE); |
| 1565 | if (mv643xx_eth_shared_base == NULL) |
| 1566 | return -ENOMEM; |
| 1567 | |
| 1568 | return 0; |
| 1569 | |
| 1570 | } |
| 1571 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1572 | static int mv643xx_eth_shared_remove(struct platform_device *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1573 | { |
| 1574 | iounmap(mv643xx_eth_shared_base); |
| 1575 | mv643xx_eth_shared_base = NULL; |
| 1576 | |
| 1577 | return 0; |
| 1578 | } |
| 1579 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1580 | static struct platform_driver mv643xx_eth_driver = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1581 | .probe = mv643xx_eth_probe, |
| 1582 | .remove = mv643xx_eth_remove, |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1583 | .driver = { |
| 1584 | .name = MV643XX_ETH_NAME, |
| 1585 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1586 | }; |
| 1587 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1588 | static struct platform_driver mv643xx_eth_shared_driver = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1589 | .probe = mv643xx_eth_shared_probe, |
| 1590 | .remove = mv643xx_eth_shared_remove, |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1591 | .driver = { |
| 1592 | .name = MV643XX_ETH_SHARED_NAME, |
| 1593 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1594 | }; |
| 1595 | |
| 1596 | /* |
| 1597 | * mv643xx_init_module |
| 1598 | * |
| 1599 | * Registers the network drivers into the Linux kernel |
| 1600 | * |
| 1601 | * Input : N/A |
| 1602 | * |
| 1603 | * Output : N/A |
| 1604 | */ |
| 1605 | static int __init mv643xx_init_module(void) |
| 1606 | { |
| 1607 | int rc; |
| 1608 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1609 | rc = platform_driver_register(&mv643xx_eth_shared_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1610 | if (!rc) { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1611 | rc = platform_driver_register(&mv643xx_eth_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1612 | if (rc) |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1613 | platform_driver_unregister(&mv643xx_eth_shared_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1614 | } |
| 1615 | return rc; |
| 1616 | } |
| 1617 | |
| 1618 | /* |
| 1619 | * mv643xx_cleanup_module |
| 1620 | * |
| 1621 | * Registers the network drivers into the Linux kernel |
| 1622 | * |
| 1623 | * Input : N/A |
| 1624 | * |
| 1625 | * Output : N/A |
| 1626 | */ |
| 1627 | static void __exit mv643xx_cleanup_module(void) |
| 1628 | { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1629 | platform_driver_unregister(&mv643xx_eth_driver); |
| 1630 | platform_driver_unregister(&mv643xx_eth_shared_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1631 | } |
| 1632 | |
| 1633 | module_init(mv643xx_init_module); |
| 1634 | module_exit(mv643xx_cleanup_module); |
| 1635 | |
| 1636 | MODULE_LICENSE("GPL"); |
| 1637 | MODULE_AUTHOR( "Rabeeh Khoury, Assaf Hoffman, Matthew Dharm, Manish Lachwani" |
| 1638 | " and Dale Farnsworth"); |
| 1639 | MODULE_DESCRIPTION("Ethernet driver for Marvell MV643XX"); |
| 1640 | |
| 1641 | /* |
| 1642 | * The second part is the low level driver of the gigE ethernet ports. |
| 1643 | */ |
| 1644 | |
| 1645 | /* |
| 1646 | * Marvell's Gigabit Ethernet controller low level driver |
| 1647 | * |
| 1648 | * DESCRIPTION: |
| 1649 | * This file introduce low level API to Marvell's Gigabit Ethernet |
| 1650 | * controller. This Gigabit Ethernet Controller driver API controls |
| 1651 | * 1) Operations (i.e. port init, start, reset etc'). |
| 1652 | * 2) Data flow (i.e. port send, receive etc'). |
| 1653 | * Each Gigabit Ethernet port is controlled via |
| 1654 | * struct mv643xx_private. |
| 1655 | * This struct includes user configuration information as well as |
| 1656 | * driver internal data needed for its operations. |
| 1657 | * |
| 1658 | * Supported Features: |
| 1659 | * - This low level driver is OS independent. Allocating memory for |
| 1660 | * the descriptor rings and buffers are not within the scope of |
| 1661 | * this driver. |
| 1662 | * - The user is free from Rx/Tx queue managing. |
| 1663 | * - This low level driver introduce functionality API that enable |
| 1664 | * the to operate Marvell's Gigabit Ethernet Controller in a |
| 1665 | * convenient way. |
| 1666 | * - Simple Gigabit Ethernet port operation API. |
| 1667 | * - Simple Gigabit Ethernet port data flow API. |
| 1668 | * - Data flow and operation API support per queue functionality. |
| 1669 | * - Support cached descriptors for better performance. |
| 1670 | * - Enable access to all four DRAM banks and internal SRAM memory |
| 1671 | * spaces. |
| 1672 | * - PHY access and control API. |
| 1673 | * - Port control register configuration API. |
| 1674 | * - Full control over Unicast and Multicast MAC configurations. |
| 1675 | * |
| 1676 | * Operation flow: |
| 1677 | * |
| 1678 | * Initialization phase |
| 1679 | * This phase complete the initialization of the the |
| 1680 | * mv643xx_private struct. |
| 1681 | * User information regarding port configuration has to be set |
| 1682 | * prior to calling the port initialization routine. |
| 1683 | * |
| 1684 | * In this phase any port Tx/Rx activity is halted, MIB counters |
| 1685 | * are cleared, PHY address is set according to user parameter and |
| 1686 | * access to DRAM and internal SRAM memory spaces. |
| 1687 | * |
| 1688 | * Driver ring initialization |
| 1689 | * Allocating memory for the descriptor rings and buffers is not |
| 1690 | * within the scope of this driver. Thus, the user is required to |
| 1691 | * allocate memory for the descriptors ring and buffers. Those |
| 1692 | * memory parameters are used by the Rx and Tx ring initialization |
| 1693 | * routines in order to curve the descriptor linked list in a form |
| 1694 | * of a ring. |
| 1695 | * Note: Pay special attention to alignment issues when using |
| 1696 | * cached descriptors/buffers. In this phase the driver store |
| 1697 | * information in the mv643xx_private struct regarding each queue |
| 1698 | * ring. |
| 1699 | * |
| 1700 | * Driver start |
| 1701 | * This phase prepares the Ethernet port for Rx and Tx activity. |
| 1702 | * It uses the information stored in the mv643xx_private struct to |
| 1703 | * initialize the various port registers. |
| 1704 | * |
| 1705 | * Data flow: |
| 1706 | * All packet references to/from the driver are done using |
| 1707 | * struct pkt_info. |
| 1708 | * This struct is a unified struct used with Rx and Tx operations. |
| 1709 | * This way the user is not required to be familiar with neither |
| 1710 | * Tx nor Rx descriptors structures. |
| 1711 | * The driver's descriptors rings are management by indexes. |
| 1712 | * Those indexes controls the ring resources and used to indicate |
| 1713 | * a SW resource error: |
| 1714 | * 'current' |
| 1715 | * This index points to the current available resource for use. For |
| 1716 | * example in Rx process this index will point to the descriptor |
| 1717 | * that will be passed to the user upon calling the receive |
| 1718 | * routine. In Tx process, this index will point to the descriptor |
| 1719 | * that will be assigned with the user packet info and transmitted. |
| 1720 | * 'used' |
| 1721 | * This index points to the descriptor that need to restore its |
| 1722 | * resources. For example in Rx process, using the Rx buffer return |
| 1723 | * API will attach the buffer returned in packet info to the |
| 1724 | * descriptor pointed by 'used'. In Tx process, using the Tx |
| 1725 | * descriptor return will merely return the user packet info with |
| 1726 | * the command status of the transmitted buffer pointed by the |
| 1727 | * 'used' index. Nevertheless, it is essential to use this routine |
| 1728 | * to update the 'used' index. |
| 1729 | * 'first' |
| 1730 | * This index supports Tx Scatter-Gather. It points to the first |
| 1731 | * descriptor of a packet assembled of multiple buffers. For |
| 1732 | * example when in middle of Such packet we have a Tx resource |
| 1733 | * error the 'curr' index get the value of 'first' to indicate |
| 1734 | * that the ring returned to its state before trying to transmit |
| 1735 | * this packet. |
| 1736 | * |
| 1737 | * Receive operation: |
| 1738 | * The eth_port_receive API set the packet information struct, |
| 1739 | * passed by the caller, with received information from the |
| 1740 | * 'current' SDMA descriptor. |
| 1741 | * It is the user responsibility to return this resource back |
| 1742 | * to the Rx descriptor ring to enable the reuse of this source. |
| 1743 | * Return Rx resource is done using the eth_rx_return_buff API. |
| 1744 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1745 | * Prior to calling the initialization routine eth_port_init() the user |
| 1746 | * must set the following fields under mv643xx_private struct: |
| 1747 | * port_num User Ethernet port number. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1748 | * port_config User port configuration value. |
| 1749 | * port_config_extend User port config extend value. |
| 1750 | * port_sdma_config User port SDMA config value. |
| 1751 | * port_serial_control User port serial control value. |
| 1752 | * |
| 1753 | * This driver data flow is done using the struct pkt_info which |
| 1754 | * is a unified struct for Rx and Tx operations: |
| 1755 | * |
| 1756 | * byte_cnt Tx/Rx descriptor buffer byte count. |
| 1757 | * l4i_chk CPU provided TCP Checksum. For Tx operation |
| 1758 | * only. |
| 1759 | * cmd_sts Tx/Rx descriptor command status. |
| 1760 | * buf_ptr Tx/Rx descriptor buffer pointer. |
| 1761 | * return_info Tx/Rx user resource return information. |
| 1762 | */ |
| 1763 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1764 | /* PHY routines */ |
| 1765 | static int ethernet_phy_get(unsigned int eth_port_num); |
| 1766 | static void ethernet_phy_set(unsigned int eth_port_num, int phy_addr); |
| 1767 | |
| 1768 | /* Ethernet Port routines */ |
Dale Farnsworth | cf4086c | 2006-01-27 01:07:48 -0700 | [diff] [blame] | 1769 | static void eth_port_set_filter_table_entry(int table, unsigned char entry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1770 | |
| 1771 | /* |
| 1772 | * eth_port_init - Initialize the Ethernet port driver |
| 1773 | * |
| 1774 | * DESCRIPTION: |
| 1775 | * This function prepares the ethernet port to start its activity: |
| 1776 | * 1) Completes the ethernet port driver struct initialization toward port |
| 1777 | * start routine. |
| 1778 | * 2) Resets the device to a quiescent state in case of warm reboot. |
| 1779 | * 3) Enable SDMA access to all four DRAM banks as well as internal SRAM. |
| 1780 | * 4) Clean MAC tables. The reset status of those tables is unknown. |
| 1781 | * 5) Set PHY address. |
| 1782 | * Note: Call this routine prior to eth_port_start routine and after |
| 1783 | * setting user values in the user fields of Ethernet port control |
| 1784 | * struct. |
| 1785 | * |
| 1786 | * INPUT: |
| 1787 | * struct mv643xx_private *mp Ethernet port control struct |
| 1788 | * |
| 1789 | * OUTPUT: |
| 1790 | * See description. |
| 1791 | * |
| 1792 | * RETURN: |
| 1793 | * None. |
| 1794 | */ |
| 1795 | static void eth_port_init(struct mv643xx_private *mp) |
| 1796 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1797 | mp->rx_resource_err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1798 | |
| 1799 | eth_port_reset(mp->port_num); |
| 1800 | |
| 1801 | eth_port_init_mac_tables(mp->port_num); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1802 | } |
| 1803 | |
| 1804 | /* |
| 1805 | * eth_port_start - Start the Ethernet port activity. |
| 1806 | * |
| 1807 | * DESCRIPTION: |
| 1808 | * This routine prepares the Ethernet port for Rx and Tx activity: |
| 1809 | * 1. Initialize Tx and Rx Current Descriptor Pointer for each queue that |
| 1810 | * has been initialized a descriptor's ring (using |
| 1811 | * ether_init_tx_desc_ring for Tx and ether_init_rx_desc_ring for Rx) |
| 1812 | * 2. Initialize and enable the Ethernet configuration port by writing to |
| 1813 | * the port's configuration and command registers. |
| 1814 | * 3. Initialize and enable the SDMA by writing to the SDMA's |
| 1815 | * configuration and command registers. After completing these steps, |
| 1816 | * the ethernet port SDMA can starts to perform Rx and Tx activities. |
| 1817 | * |
| 1818 | * Note: Each Rx and Tx queue descriptor's list must be initialized prior |
| 1819 | * to calling this function (use ether_init_tx_desc_ring for Tx queues |
| 1820 | * and ether_init_rx_desc_ring for Rx queues). |
| 1821 | * |
| 1822 | * INPUT: |
Dale Farnsworth | ed9b5d4 | 2006-01-27 01:06:38 -0700 | [diff] [blame] | 1823 | * dev - a pointer to the required interface |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1824 | * |
| 1825 | * OUTPUT: |
| 1826 | * Ethernet port is ready to receive and transmit. |
| 1827 | * |
| 1828 | * RETURN: |
| 1829 | * None. |
| 1830 | */ |
Dale Farnsworth | ed9b5d4 | 2006-01-27 01:06:38 -0700 | [diff] [blame] | 1831 | static void eth_port_start(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1832 | { |
Dale Farnsworth | ed9b5d4 | 2006-01-27 01:06:38 -0700 | [diff] [blame] | 1833 | struct mv643xx_private *mp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1834 | unsigned int port_num = mp->port_num; |
| 1835 | int tx_curr_desc, rx_curr_desc; |
James Chapman | d0412d9 | 2006-01-27 01:15:30 -0700 | [diff] [blame] | 1836 | u32 pscr; |
| 1837 | struct ethtool_cmd ethtool_cmd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1838 | |
| 1839 | /* Assignment of Tx CTRP of given queue */ |
| 1840 | tx_curr_desc = mp->tx_curr_desc_q; |
| 1841 | mv_write(MV643XX_ETH_TX_CURRENT_QUEUE_DESC_PTR_0(port_num), |
| 1842 | (u32)((struct eth_tx_desc *)mp->tx_desc_dma + tx_curr_desc)); |
| 1843 | |
| 1844 | /* Assignment of Rx CRDP of given queue */ |
| 1845 | rx_curr_desc = mp->rx_curr_desc_q; |
| 1846 | mv_write(MV643XX_ETH_RX_CURRENT_QUEUE_DESC_PTR_0(port_num), |
| 1847 | (u32)((struct eth_rx_desc *)mp->rx_desc_dma + rx_curr_desc)); |
| 1848 | |
| 1849 | /* Add the assigned Ethernet address to the port's address table */ |
Dale Farnsworth | ed9b5d4 | 2006-01-27 01:06:38 -0700 | [diff] [blame] | 1850 | eth_port_uc_addr_set(port_num, dev->dev_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1851 | |
| 1852 | /* Assign port configuration and command. */ |
Dale Farnsworth | 0199987 | 2006-01-27 01:18:01 -0700 | [diff] [blame] | 1853 | mv_write(MV643XX_ETH_PORT_CONFIG_REG(port_num), |
| 1854 | MV643XX_ETH_PORT_CONFIG_DEFAULT_VALUE); |
| 1855 | |
| 1856 | mv_write(MV643XX_ETH_PORT_CONFIG_EXTEND_REG(port_num), |
| 1857 | MV643XX_ETH_PORT_CONFIG_EXTEND_DEFAULT_VALUE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1858 | |
James Chapman | d0412d9 | 2006-01-27 01:15:30 -0700 | [diff] [blame] | 1859 | pscr = mv_read(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num)); |
Dale Farnsworth | 0199987 | 2006-01-27 01:18:01 -0700 | [diff] [blame] | 1860 | |
| 1861 | pscr &= ~(MV643XX_ETH_SERIAL_PORT_ENABLE | MV643XX_ETH_FORCE_LINK_PASS); |
James Chapman | d0412d9 | 2006-01-27 01:15:30 -0700 | [diff] [blame] | 1862 | mv_write(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num), pscr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1863 | |
James Chapman | d0412d9 | 2006-01-27 01:15:30 -0700 | [diff] [blame] | 1864 | pscr |= MV643XX_ETH_DISABLE_AUTO_NEG_FOR_FLOW_CTRL | |
| 1865 | MV643XX_ETH_DISABLE_AUTO_NEG_SPEED_GMII | |
| 1866 | MV643XX_ETH_DISABLE_AUTO_NEG_FOR_DUPLX | |
| 1867 | MV643XX_ETH_DO_NOT_FORCE_LINK_FAIL | |
| 1868 | MV643XX_ETH_SERIAL_PORT_CONTROL_RESERVED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1869 | |
James Chapman | d0412d9 | 2006-01-27 01:15:30 -0700 | [diff] [blame] | 1870 | mv_write(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num), pscr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1871 | |
James Chapman | d0412d9 | 2006-01-27 01:15:30 -0700 | [diff] [blame] | 1872 | pscr |= MV643XX_ETH_SERIAL_PORT_ENABLE; |
| 1873 | mv_write(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num), pscr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1874 | |
| 1875 | /* Assign port SDMA configuration */ |
Dale Farnsworth | 0199987 | 2006-01-27 01:18:01 -0700 | [diff] [blame] | 1876 | mv_write(MV643XX_ETH_SDMA_CONFIG_REG(port_num), |
| 1877 | MV643XX_ETH_PORT_SDMA_CONFIG_DEFAULT_VALUE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1878 | |
| 1879 | /* Enable port Rx. */ |
Dale Farnsworth | ff561ee | 2006-03-03 10:02:51 -0700 | [diff] [blame^] | 1880 | mv643xx_eth_port_enable_rx(port_num, ETH_RX_QUEUES_ENABLED); |
Dale Farnsworth | 8f54371 | 2005-09-02 12:34:35 -0700 | [diff] [blame] | 1881 | |
| 1882 | /* Disable port bandwidth limits by clearing MTU register */ |
| 1883 | mv_write(MV643XX_ETH_MAXIMUM_TRANSMIT_UNIT(port_num), 0); |
James Chapman | d0412d9 | 2006-01-27 01:15:30 -0700 | [diff] [blame] | 1884 | |
| 1885 | /* save phy settings across reset */ |
| 1886 | mv643xx_get_settings(dev, ðtool_cmd); |
| 1887 | ethernet_phy_reset(mp->port_num); |
| 1888 | mv643xx_set_settings(dev, ðtool_cmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1889 | } |
| 1890 | |
| 1891 | /* |
| 1892 | * eth_port_uc_addr_set - This function Set the port Unicast address. |
| 1893 | * |
| 1894 | * DESCRIPTION: |
| 1895 | * This function Set the port Ethernet MAC address. |
| 1896 | * |
| 1897 | * INPUT: |
| 1898 | * unsigned int eth_port_num Port number. |
| 1899 | * char * p_addr Address to be set |
| 1900 | * |
| 1901 | * OUTPUT: |
Dale Farnsworth | cf4086c | 2006-01-27 01:07:48 -0700 | [diff] [blame] | 1902 | * Set MAC address low and high registers. also calls |
| 1903 | * eth_port_set_filter_table_entry() to set the unicast |
| 1904 | * table with the proper information. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1905 | * |
| 1906 | * RETURN: |
| 1907 | * N/A. |
| 1908 | * |
| 1909 | */ |
| 1910 | static void eth_port_uc_addr_set(unsigned int eth_port_num, |
| 1911 | unsigned char *p_addr) |
| 1912 | { |
| 1913 | unsigned int mac_h; |
| 1914 | unsigned int mac_l; |
Dale Farnsworth | cf4086c | 2006-01-27 01:07:48 -0700 | [diff] [blame] | 1915 | int table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1916 | |
| 1917 | mac_l = (p_addr[4] << 8) | (p_addr[5]); |
| 1918 | mac_h = (p_addr[0] << 24) | (p_addr[1] << 16) | (p_addr[2] << 8) | |
| 1919 | (p_addr[3] << 0); |
| 1920 | |
| 1921 | mv_write(MV643XX_ETH_MAC_ADDR_LOW(eth_port_num), mac_l); |
| 1922 | mv_write(MV643XX_ETH_MAC_ADDR_HIGH(eth_port_num), mac_h); |
| 1923 | |
| 1924 | /* Accept frames of this address */ |
Dale Farnsworth | cf4086c | 2006-01-27 01:07:48 -0700 | [diff] [blame] | 1925 | table = MV643XX_ETH_DA_FILTER_UNICAST_TABLE_BASE(eth_port_num); |
| 1926 | eth_port_set_filter_table_entry(table, p_addr[5] & 0x0f); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1927 | } |
| 1928 | |
| 1929 | /* |
| 1930 | * eth_port_uc_addr_get - This function retrieves the port Unicast address |
| 1931 | * (MAC address) from the ethernet hw registers. |
| 1932 | * |
| 1933 | * DESCRIPTION: |
| 1934 | * This function retrieves the port Ethernet MAC address. |
| 1935 | * |
| 1936 | * INPUT: |
| 1937 | * unsigned int eth_port_num Port number. |
| 1938 | * char *MacAddr pointer where the MAC address is stored |
| 1939 | * |
| 1940 | * OUTPUT: |
| 1941 | * Copy the MAC address to the location pointed to by MacAddr |
| 1942 | * |
| 1943 | * RETURN: |
| 1944 | * N/A. |
| 1945 | * |
| 1946 | */ |
| 1947 | static void eth_port_uc_addr_get(struct net_device *dev, unsigned char *p_addr) |
| 1948 | { |
| 1949 | struct mv643xx_private *mp = netdev_priv(dev); |
| 1950 | unsigned int mac_h; |
| 1951 | unsigned int mac_l; |
| 1952 | |
| 1953 | mac_h = mv_read(MV643XX_ETH_MAC_ADDR_HIGH(mp->port_num)); |
| 1954 | mac_l = mv_read(MV643XX_ETH_MAC_ADDR_LOW(mp->port_num)); |
| 1955 | |
| 1956 | p_addr[0] = (mac_h >> 24) & 0xff; |
| 1957 | p_addr[1] = (mac_h >> 16) & 0xff; |
| 1958 | p_addr[2] = (mac_h >> 8) & 0xff; |
| 1959 | p_addr[3] = mac_h & 0xff; |
| 1960 | p_addr[4] = (mac_l >> 8) & 0xff; |
| 1961 | p_addr[5] = mac_l & 0xff; |
| 1962 | } |
| 1963 | |
| 1964 | /* |
Dale Farnsworth | 16e0301 | 2006-01-16 16:50:02 -0700 | [diff] [blame] | 1965 | * The entries in each table are indexed by a hash of a packet's MAC |
| 1966 | * address. One bit in each entry determines whether the packet is |
| 1967 | * accepted. There are 4 entries (each 8 bits wide) in each register |
| 1968 | * of the table. The bits in each entry are defined as follows: |
| 1969 | * 0 Accept=1, Drop=0 |
| 1970 | * 3-1 Queue (ETH_Q0=0) |
| 1971 | * 7-4 Reserved = 0; |
| 1972 | */ |
| 1973 | static void eth_port_set_filter_table_entry(int table, unsigned char entry) |
| 1974 | { |
| 1975 | unsigned int table_reg; |
| 1976 | unsigned int tbl_offset; |
| 1977 | unsigned int reg_offset; |
| 1978 | |
| 1979 | tbl_offset = (entry / 4) * 4; /* Register offset of DA table entry */ |
| 1980 | reg_offset = entry % 4; /* Entry offset within the register */ |
| 1981 | |
| 1982 | /* Set "accepts frame bit" at specified table entry */ |
| 1983 | table_reg = mv_read(table + tbl_offset); |
| 1984 | table_reg |= 0x01 << (8 * reg_offset); |
| 1985 | mv_write(table + tbl_offset, table_reg); |
| 1986 | } |
| 1987 | |
| 1988 | /* |
| 1989 | * eth_port_mc_addr - Multicast address settings. |
| 1990 | * |
| 1991 | * The MV device supports multicast using two tables: |
| 1992 | * 1) Special Multicast Table for MAC addresses of the form |
| 1993 | * 0x01-00-5E-00-00-XX (where XX is between 0x00 and 0x_FF). |
| 1994 | * The MAC DA[7:0] bits are used as a pointer to the Special Multicast |
| 1995 | * Table entries in the DA-Filter table. |
| 1996 | * 2) Other Multicast Table for multicast of another type. A CRC-8bit |
| 1997 | * is used as an index to the Other Multicast Table entries in the |
| 1998 | * DA-Filter table. This function calculates the CRC-8bit value. |
| 1999 | * In either case, eth_port_set_filter_table_entry() is then called |
| 2000 | * to set to set the actual table entry. |
| 2001 | */ |
| 2002 | static void eth_port_mc_addr(unsigned int eth_port_num, unsigned char *p_addr) |
| 2003 | { |
| 2004 | unsigned int mac_h; |
| 2005 | unsigned int mac_l; |
| 2006 | unsigned char crc_result = 0; |
| 2007 | int table; |
| 2008 | int mac_array[48]; |
| 2009 | int crc[8]; |
| 2010 | int i; |
| 2011 | |
| 2012 | if ((p_addr[0] == 0x01) && (p_addr[1] == 0x00) && |
| 2013 | (p_addr[2] == 0x5E) && (p_addr[3] == 0x00) && (p_addr[4] == 0x00)) { |
| 2014 | table = MV643XX_ETH_DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE |
| 2015 | (eth_port_num); |
| 2016 | eth_port_set_filter_table_entry(table, p_addr[5]); |
| 2017 | return; |
| 2018 | } |
| 2019 | |
| 2020 | /* Calculate CRC-8 out of the given address */ |
| 2021 | mac_h = (p_addr[0] << 8) | (p_addr[1]); |
| 2022 | mac_l = (p_addr[2] << 24) | (p_addr[3] << 16) | |
| 2023 | (p_addr[4] << 8) | (p_addr[5] << 0); |
| 2024 | |
| 2025 | for (i = 0; i < 32; i++) |
| 2026 | mac_array[i] = (mac_l >> i) & 0x1; |
| 2027 | for (i = 32; i < 48; i++) |
| 2028 | mac_array[i] = (mac_h >> (i - 32)) & 0x1; |
| 2029 | |
| 2030 | crc[0] = mac_array[45] ^ mac_array[43] ^ mac_array[40] ^ mac_array[39] ^ |
| 2031 | mac_array[35] ^ mac_array[34] ^ mac_array[31] ^ mac_array[30] ^ |
| 2032 | mac_array[28] ^ mac_array[23] ^ mac_array[21] ^ mac_array[19] ^ |
| 2033 | mac_array[18] ^ mac_array[16] ^ mac_array[14] ^ mac_array[12] ^ |
| 2034 | mac_array[8] ^ mac_array[7] ^ mac_array[6] ^ mac_array[0]; |
| 2035 | |
| 2036 | crc[1] = mac_array[46] ^ mac_array[45] ^ mac_array[44] ^ mac_array[43] ^ |
| 2037 | mac_array[41] ^ mac_array[39] ^ mac_array[36] ^ mac_array[34] ^ |
| 2038 | mac_array[32] ^ mac_array[30] ^ mac_array[29] ^ mac_array[28] ^ |
| 2039 | mac_array[24] ^ mac_array[23] ^ mac_array[22] ^ mac_array[21] ^ |
| 2040 | mac_array[20] ^ mac_array[18] ^ mac_array[17] ^ mac_array[16] ^ |
| 2041 | mac_array[15] ^ mac_array[14] ^ mac_array[13] ^ mac_array[12] ^ |
| 2042 | mac_array[9] ^ mac_array[6] ^ mac_array[1] ^ mac_array[0]; |
| 2043 | |
| 2044 | crc[2] = mac_array[47] ^ mac_array[46] ^ mac_array[44] ^ mac_array[43] ^ |
| 2045 | mac_array[42] ^ mac_array[39] ^ mac_array[37] ^ mac_array[34] ^ |
| 2046 | mac_array[33] ^ mac_array[29] ^ mac_array[28] ^ mac_array[25] ^ |
| 2047 | mac_array[24] ^ mac_array[22] ^ mac_array[17] ^ mac_array[15] ^ |
| 2048 | mac_array[13] ^ mac_array[12] ^ mac_array[10] ^ mac_array[8] ^ |
| 2049 | mac_array[6] ^ mac_array[2] ^ mac_array[1] ^ mac_array[0]; |
| 2050 | |
| 2051 | crc[3] = mac_array[47] ^ mac_array[45] ^ mac_array[44] ^ mac_array[43] ^ |
| 2052 | mac_array[40] ^ mac_array[38] ^ mac_array[35] ^ mac_array[34] ^ |
| 2053 | mac_array[30] ^ mac_array[29] ^ mac_array[26] ^ mac_array[25] ^ |
| 2054 | mac_array[23] ^ mac_array[18] ^ mac_array[16] ^ mac_array[14] ^ |
| 2055 | mac_array[13] ^ mac_array[11] ^ mac_array[9] ^ mac_array[7] ^ |
| 2056 | mac_array[3] ^ mac_array[2] ^ mac_array[1]; |
| 2057 | |
| 2058 | crc[4] = mac_array[46] ^ mac_array[45] ^ mac_array[44] ^ mac_array[41] ^ |
| 2059 | mac_array[39] ^ mac_array[36] ^ mac_array[35] ^ mac_array[31] ^ |
| 2060 | mac_array[30] ^ mac_array[27] ^ mac_array[26] ^ mac_array[24] ^ |
| 2061 | mac_array[19] ^ mac_array[17] ^ mac_array[15] ^ mac_array[14] ^ |
| 2062 | mac_array[12] ^ mac_array[10] ^ mac_array[8] ^ mac_array[4] ^ |
| 2063 | mac_array[3] ^ mac_array[2]; |
| 2064 | |
| 2065 | crc[5] = mac_array[47] ^ mac_array[46] ^ mac_array[45] ^ mac_array[42] ^ |
| 2066 | mac_array[40] ^ mac_array[37] ^ mac_array[36] ^ mac_array[32] ^ |
| 2067 | mac_array[31] ^ mac_array[28] ^ mac_array[27] ^ mac_array[25] ^ |
| 2068 | mac_array[20] ^ mac_array[18] ^ mac_array[16] ^ mac_array[15] ^ |
| 2069 | mac_array[13] ^ mac_array[11] ^ mac_array[9] ^ mac_array[5] ^ |
| 2070 | mac_array[4] ^ mac_array[3]; |
| 2071 | |
| 2072 | crc[6] = mac_array[47] ^ mac_array[46] ^ mac_array[43] ^ mac_array[41] ^ |
| 2073 | mac_array[38] ^ mac_array[37] ^ mac_array[33] ^ mac_array[32] ^ |
| 2074 | mac_array[29] ^ mac_array[28] ^ mac_array[26] ^ mac_array[21] ^ |
| 2075 | mac_array[19] ^ mac_array[17] ^ mac_array[16] ^ mac_array[14] ^ |
| 2076 | mac_array[12] ^ mac_array[10] ^ mac_array[6] ^ mac_array[5] ^ |
| 2077 | mac_array[4]; |
| 2078 | |
| 2079 | crc[7] = mac_array[47] ^ mac_array[44] ^ mac_array[42] ^ mac_array[39] ^ |
| 2080 | mac_array[38] ^ mac_array[34] ^ mac_array[33] ^ mac_array[30] ^ |
| 2081 | mac_array[29] ^ mac_array[27] ^ mac_array[22] ^ mac_array[20] ^ |
| 2082 | mac_array[18] ^ mac_array[17] ^ mac_array[15] ^ mac_array[13] ^ |
| 2083 | mac_array[11] ^ mac_array[7] ^ mac_array[6] ^ mac_array[5]; |
| 2084 | |
| 2085 | for (i = 0; i < 8; i++) |
| 2086 | crc_result = crc_result | (crc[i] << i); |
| 2087 | |
| 2088 | table = MV643XX_ETH_DA_FILTER_OTHER_MULTICAST_TABLE_BASE(eth_port_num); |
| 2089 | eth_port_set_filter_table_entry(table, crc_result); |
| 2090 | } |
| 2091 | |
| 2092 | /* |
| 2093 | * Set the entire multicast list based on dev->mc_list. |
| 2094 | */ |
| 2095 | static void eth_port_set_multicast_list(struct net_device *dev) |
| 2096 | { |
| 2097 | |
| 2098 | struct dev_mc_list *mc_list; |
| 2099 | int i; |
| 2100 | int table_index; |
| 2101 | struct mv643xx_private *mp = netdev_priv(dev); |
| 2102 | unsigned int eth_port_num = mp->port_num; |
| 2103 | |
| 2104 | /* If the device is in promiscuous mode or in all multicast mode, |
| 2105 | * we will fully populate both multicast tables with accept. |
| 2106 | * This is guaranteed to yield a match on all multicast addresses... |
| 2107 | */ |
| 2108 | if ((dev->flags & IFF_PROMISC) || (dev->flags & IFF_ALLMULTI)) { |
| 2109 | for (table_index = 0; table_index <= 0xFC; table_index += 4) { |
Dale Farnsworth | b4de905 | 2006-01-27 01:04:43 -0700 | [diff] [blame] | 2110 | /* Set all entries in DA filter special multicast |
| 2111 | * table (Ex_dFSMT) |
| 2112 | * Set for ETH_Q0 for now |
| 2113 | * Bits |
| 2114 | * 0 Accept=1, Drop=0 |
| 2115 | * 3-1 Queue ETH_Q0=0 |
| 2116 | * 7-4 Reserved = 0; |
| 2117 | */ |
| 2118 | mv_write(MV643XX_ETH_DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE(eth_port_num) + table_index, 0x01010101); |
Dale Farnsworth | 16e0301 | 2006-01-16 16:50:02 -0700 | [diff] [blame] | 2119 | |
Dale Farnsworth | b4de905 | 2006-01-27 01:04:43 -0700 | [diff] [blame] | 2120 | /* Set all entries in DA filter other multicast |
| 2121 | * table (Ex_dFOMT) |
| 2122 | * Set for ETH_Q0 for now |
| 2123 | * Bits |
| 2124 | * 0 Accept=1, Drop=0 |
| 2125 | * 3-1 Queue ETH_Q0=0 |
| 2126 | * 7-4 Reserved = 0; |
| 2127 | */ |
| 2128 | mv_write(MV643XX_ETH_DA_FILTER_OTHER_MULTICAST_TABLE_BASE(eth_port_num) + table_index, 0x01010101); |
| 2129 | } |
Dale Farnsworth | 16e0301 | 2006-01-16 16:50:02 -0700 | [diff] [blame] | 2130 | return; |
| 2131 | } |
| 2132 | |
| 2133 | /* We will clear out multicast tables every time we get the list. |
| 2134 | * Then add the entire new list... |
| 2135 | */ |
| 2136 | for (table_index = 0; table_index <= 0xFC; table_index += 4) { |
| 2137 | /* Clear DA filter special multicast table (Ex_dFSMT) */ |
| 2138 | mv_write(MV643XX_ETH_DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE |
| 2139 | (eth_port_num) + table_index, 0); |
| 2140 | |
| 2141 | /* Clear DA filter other multicast table (Ex_dFOMT) */ |
| 2142 | mv_write(MV643XX_ETH_DA_FILTER_OTHER_MULTICAST_TABLE_BASE |
| 2143 | (eth_port_num) + table_index, 0); |
| 2144 | } |
| 2145 | |
| 2146 | /* Get pointer to net_device multicast list and add each one... */ |
| 2147 | for (i = 0, mc_list = dev->mc_list; |
| 2148 | (i < 256) && (mc_list != NULL) && (i < dev->mc_count); |
| 2149 | i++, mc_list = mc_list->next) |
| 2150 | if (mc_list->dmi_addrlen == 6) |
| 2151 | eth_port_mc_addr(eth_port_num, mc_list->dmi_addr); |
| 2152 | } |
| 2153 | |
| 2154 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2155 | * eth_port_init_mac_tables - Clear all entrance in the UC, SMC and OMC tables |
| 2156 | * |
| 2157 | * DESCRIPTION: |
| 2158 | * Go through all the DA filter tables (Unicast, Special Multicast & |
| 2159 | * Other Multicast) and set each entry to 0. |
| 2160 | * |
| 2161 | * INPUT: |
| 2162 | * unsigned int eth_port_num Ethernet Port number. |
| 2163 | * |
| 2164 | * OUTPUT: |
| 2165 | * Multicast and Unicast packets are rejected. |
| 2166 | * |
| 2167 | * RETURN: |
| 2168 | * None. |
| 2169 | */ |
| 2170 | static void eth_port_init_mac_tables(unsigned int eth_port_num) |
| 2171 | { |
| 2172 | int table_index; |
| 2173 | |
| 2174 | /* Clear DA filter unicast table (Ex_dFUT) */ |
| 2175 | for (table_index = 0; table_index <= 0xC; table_index += 4) |
Dale Farnsworth | cf4086c | 2006-01-27 01:07:48 -0700 | [diff] [blame] | 2176 | mv_write(MV643XX_ETH_DA_FILTER_UNICAST_TABLE_BASE |
| 2177 | (eth_port_num) + table_index, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2178 | |
| 2179 | for (table_index = 0; table_index <= 0xFC; table_index += 4) { |
| 2180 | /* Clear DA filter special multicast table (Ex_dFSMT) */ |
Dale Farnsworth | 16e0301 | 2006-01-16 16:50:02 -0700 | [diff] [blame] | 2181 | mv_write(MV643XX_ETH_DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE |
| 2182 | (eth_port_num) + table_index, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2183 | /* Clear DA filter other multicast table (Ex_dFOMT) */ |
Dale Farnsworth | 16e0301 | 2006-01-16 16:50:02 -0700 | [diff] [blame] | 2184 | mv_write(MV643XX_ETH_DA_FILTER_OTHER_MULTICAST_TABLE_BASE |
| 2185 | (eth_port_num) + table_index, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2186 | } |
| 2187 | } |
| 2188 | |
| 2189 | /* |
| 2190 | * eth_clear_mib_counters - Clear all MIB counters |
| 2191 | * |
| 2192 | * DESCRIPTION: |
| 2193 | * This function clears all MIB counters of a specific ethernet port. |
| 2194 | * A read from the MIB counter will reset the counter. |
| 2195 | * |
| 2196 | * INPUT: |
| 2197 | * unsigned int eth_port_num Ethernet Port number. |
| 2198 | * |
| 2199 | * OUTPUT: |
| 2200 | * After reading all MIB counters, the counters resets. |
| 2201 | * |
| 2202 | * RETURN: |
| 2203 | * MIB counter value. |
| 2204 | * |
| 2205 | */ |
| 2206 | static void eth_clear_mib_counters(unsigned int eth_port_num) |
| 2207 | { |
| 2208 | int i; |
| 2209 | |
| 2210 | /* Perform dummy reads from MIB counters */ |
| 2211 | for (i = ETH_MIB_GOOD_OCTETS_RECEIVED_LOW; i < ETH_MIB_LATE_COLLISION; |
| 2212 | i += 4) |
| 2213 | mv_read(MV643XX_ETH_MIB_COUNTERS_BASE(eth_port_num) + i); |
| 2214 | } |
| 2215 | |
| 2216 | static inline u32 read_mib(struct mv643xx_private *mp, int offset) |
| 2217 | { |
| 2218 | return mv_read(MV643XX_ETH_MIB_COUNTERS_BASE(mp->port_num) + offset); |
| 2219 | } |
| 2220 | |
| 2221 | static void eth_update_mib_counters(struct mv643xx_private *mp) |
| 2222 | { |
| 2223 | struct mv643xx_mib_counters *p = &mp->mib_counters; |
| 2224 | int offset; |
| 2225 | |
| 2226 | p->good_octets_received += |
| 2227 | read_mib(mp, ETH_MIB_GOOD_OCTETS_RECEIVED_LOW); |
| 2228 | p->good_octets_received += |
| 2229 | (u64)read_mib(mp, ETH_MIB_GOOD_OCTETS_RECEIVED_HIGH) << 32; |
| 2230 | |
| 2231 | for (offset = ETH_MIB_BAD_OCTETS_RECEIVED; |
| 2232 | offset <= ETH_MIB_FRAMES_1024_TO_MAX_OCTETS; |
| 2233 | offset += 4) |
| 2234 | *(u32 *)((char *)p + offset) = read_mib(mp, offset); |
| 2235 | |
| 2236 | p->good_octets_sent += read_mib(mp, ETH_MIB_GOOD_OCTETS_SENT_LOW); |
| 2237 | p->good_octets_sent += |
| 2238 | (u64)read_mib(mp, ETH_MIB_GOOD_OCTETS_SENT_HIGH) << 32; |
| 2239 | |
| 2240 | for (offset = ETH_MIB_GOOD_FRAMES_SENT; |
| 2241 | offset <= ETH_MIB_LATE_COLLISION; |
| 2242 | offset += 4) |
| 2243 | *(u32 *)((char *)p + offset) = read_mib(mp, offset); |
| 2244 | } |
| 2245 | |
| 2246 | /* |
| 2247 | * ethernet_phy_detect - Detect whether a phy is present |
| 2248 | * |
| 2249 | * DESCRIPTION: |
| 2250 | * This function tests whether there is a PHY present on |
| 2251 | * the specified port. |
| 2252 | * |
| 2253 | * INPUT: |
| 2254 | * unsigned int eth_port_num Ethernet Port number. |
| 2255 | * |
| 2256 | * OUTPUT: |
| 2257 | * None |
| 2258 | * |
| 2259 | * RETURN: |
| 2260 | * 0 on success |
| 2261 | * -ENODEV on failure |
| 2262 | * |
| 2263 | */ |
| 2264 | static int ethernet_phy_detect(unsigned int port_num) |
| 2265 | { |
| 2266 | unsigned int phy_reg_data0; |
| 2267 | int auto_neg; |
| 2268 | |
| 2269 | eth_port_read_smi_reg(port_num, 0, &phy_reg_data0); |
| 2270 | auto_neg = phy_reg_data0 & 0x1000; |
| 2271 | phy_reg_data0 ^= 0x1000; /* invert auto_neg */ |
| 2272 | eth_port_write_smi_reg(port_num, 0, phy_reg_data0); |
| 2273 | |
| 2274 | eth_port_read_smi_reg(port_num, 0, &phy_reg_data0); |
| 2275 | if ((phy_reg_data0 & 0x1000) == auto_neg) |
| 2276 | return -ENODEV; /* change didn't take */ |
| 2277 | |
| 2278 | phy_reg_data0 ^= 0x1000; |
| 2279 | eth_port_write_smi_reg(port_num, 0, phy_reg_data0); |
| 2280 | return 0; |
| 2281 | } |
| 2282 | |
| 2283 | /* |
| 2284 | * ethernet_phy_get - Get the ethernet port PHY address. |
| 2285 | * |
| 2286 | * DESCRIPTION: |
| 2287 | * This routine returns the given ethernet port PHY address. |
| 2288 | * |
| 2289 | * INPUT: |
| 2290 | * unsigned int eth_port_num Ethernet Port number. |
| 2291 | * |
| 2292 | * OUTPUT: |
| 2293 | * None. |
| 2294 | * |
| 2295 | * RETURN: |
| 2296 | * PHY address. |
| 2297 | * |
| 2298 | */ |
| 2299 | static int ethernet_phy_get(unsigned int eth_port_num) |
| 2300 | { |
| 2301 | unsigned int reg_data; |
| 2302 | |
| 2303 | reg_data = mv_read(MV643XX_ETH_PHY_ADDR_REG); |
| 2304 | |
| 2305 | return ((reg_data >> (5 * eth_port_num)) & 0x1f); |
| 2306 | } |
| 2307 | |
| 2308 | /* |
| 2309 | * ethernet_phy_set - Set the ethernet port PHY address. |
| 2310 | * |
| 2311 | * DESCRIPTION: |
| 2312 | * This routine sets the given ethernet port PHY address. |
| 2313 | * |
| 2314 | * INPUT: |
| 2315 | * unsigned int eth_port_num Ethernet Port number. |
| 2316 | * int phy_addr PHY address. |
| 2317 | * |
| 2318 | * OUTPUT: |
| 2319 | * None. |
| 2320 | * |
| 2321 | * RETURN: |
| 2322 | * None. |
| 2323 | * |
| 2324 | */ |
| 2325 | static void ethernet_phy_set(unsigned int eth_port_num, int phy_addr) |
| 2326 | { |
| 2327 | u32 reg_data; |
| 2328 | int addr_shift = 5 * eth_port_num; |
| 2329 | |
| 2330 | reg_data = mv_read(MV643XX_ETH_PHY_ADDR_REG); |
| 2331 | reg_data &= ~(0x1f << addr_shift); |
| 2332 | reg_data |= (phy_addr & 0x1f) << addr_shift; |
| 2333 | mv_write(MV643XX_ETH_PHY_ADDR_REG, reg_data); |
| 2334 | } |
| 2335 | |
| 2336 | /* |
| 2337 | * ethernet_phy_reset - Reset Ethernet port PHY. |
| 2338 | * |
| 2339 | * DESCRIPTION: |
| 2340 | * This routine utilizes the SMI interface to reset the ethernet port PHY. |
| 2341 | * |
| 2342 | * INPUT: |
| 2343 | * unsigned int eth_port_num Ethernet Port number. |
| 2344 | * |
| 2345 | * OUTPUT: |
| 2346 | * The PHY is reset. |
| 2347 | * |
| 2348 | * RETURN: |
| 2349 | * None. |
| 2350 | * |
| 2351 | */ |
| 2352 | static void ethernet_phy_reset(unsigned int eth_port_num) |
| 2353 | { |
| 2354 | unsigned int phy_reg_data; |
| 2355 | |
| 2356 | /* Reset the PHY */ |
| 2357 | eth_port_read_smi_reg(eth_port_num, 0, &phy_reg_data); |
| 2358 | phy_reg_data |= 0x8000; /* Set bit 15 to reset the PHY */ |
| 2359 | eth_port_write_smi_reg(eth_port_num, 0, phy_reg_data); |
James Chapman | d0412d9 | 2006-01-27 01:15:30 -0700 | [diff] [blame] | 2360 | |
| 2361 | /* wait for PHY to come out of reset */ |
| 2362 | do { |
| 2363 | udelay(1); |
| 2364 | eth_port_read_smi_reg(eth_port_num, 0, &phy_reg_data); |
| 2365 | } while (phy_reg_data & 0x8000); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2366 | } |
| 2367 | |
Dale Farnsworth | 9f8dd31 | 2006-01-27 01:10:47 -0700 | [diff] [blame] | 2368 | static void mv643xx_eth_port_enable_tx(unsigned int port_num, |
Dale Farnsworth | 12a87c6 | 2006-03-03 10:00:22 -0700 | [diff] [blame] | 2369 | unsigned int queues) |
Dale Farnsworth | 9f8dd31 | 2006-01-27 01:10:47 -0700 | [diff] [blame] | 2370 | { |
Dale Farnsworth | 12a87c6 | 2006-03-03 10:00:22 -0700 | [diff] [blame] | 2371 | mv_write(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_REG(port_num), queues); |
Dale Farnsworth | 9f8dd31 | 2006-01-27 01:10:47 -0700 | [diff] [blame] | 2372 | } |
| 2373 | |
| 2374 | static void mv643xx_eth_port_enable_rx(unsigned int port_num, |
Dale Farnsworth | 12a87c6 | 2006-03-03 10:00:22 -0700 | [diff] [blame] | 2375 | unsigned int queues) |
Dale Farnsworth | 9f8dd31 | 2006-01-27 01:10:47 -0700 | [diff] [blame] | 2376 | { |
Dale Farnsworth | 12a87c6 | 2006-03-03 10:00:22 -0700 | [diff] [blame] | 2377 | mv_write(MV643XX_ETH_RECEIVE_QUEUE_COMMAND_REG(port_num), queues); |
Dale Farnsworth | 9f8dd31 | 2006-01-27 01:10:47 -0700 | [diff] [blame] | 2378 | } |
| 2379 | |
| 2380 | static unsigned int mv643xx_eth_port_disable_tx(unsigned int port_num) |
| 2381 | { |
Dale Farnsworth | 12a87c6 | 2006-03-03 10:00:22 -0700 | [diff] [blame] | 2382 | u32 queues; |
Dale Farnsworth | 9f8dd31 | 2006-01-27 01:10:47 -0700 | [diff] [blame] | 2383 | |
| 2384 | /* Stop Tx port activity. Check port Tx activity. */ |
Dale Farnsworth | 12a87c6 | 2006-03-03 10:00:22 -0700 | [diff] [blame] | 2385 | queues = mv_read(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_REG(port_num)) |
Dale Farnsworth | 9f8dd31 | 2006-01-27 01:10:47 -0700 | [diff] [blame] | 2386 | & 0xFF; |
Dale Farnsworth | 12a87c6 | 2006-03-03 10:00:22 -0700 | [diff] [blame] | 2387 | if (queues) { |
| 2388 | /* Issue stop command for active queues only */ |
Dale Farnsworth | 9f8dd31 | 2006-01-27 01:10:47 -0700 | [diff] [blame] | 2389 | mv_write(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_REG(port_num), |
Dale Farnsworth | 12a87c6 | 2006-03-03 10:00:22 -0700 | [diff] [blame] | 2390 | (queues << 8)); |
Dale Farnsworth | 9f8dd31 | 2006-01-27 01:10:47 -0700 | [diff] [blame] | 2391 | |
| 2392 | /* Wait for all Tx activity to terminate. */ |
| 2393 | /* Check port cause register that all Tx queues are stopped */ |
| 2394 | while (mv_read(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_REG(port_num)) |
| 2395 | & 0xFF) |
| 2396 | udelay(PHY_WAIT_MICRO_SECONDS); |
| 2397 | |
| 2398 | /* Wait for Tx FIFO to empty */ |
| 2399 | while (mv_read(MV643XX_ETH_PORT_STATUS_REG(port_num)) & |
| 2400 | ETH_PORT_TX_FIFO_EMPTY) |
| 2401 | udelay(PHY_WAIT_MICRO_SECONDS); |
| 2402 | } |
| 2403 | |
Dale Farnsworth | 12a87c6 | 2006-03-03 10:00:22 -0700 | [diff] [blame] | 2404 | return queues; |
Dale Farnsworth | 9f8dd31 | 2006-01-27 01:10:47 -0700 | [diff] [blame] | 2405 | } |
| 2406 | |
| 2407 | static unsigned int mv643xx_eth_port_disable_rx(unsigned int port_num) |
| 2408 | { |
Dale Farnsworth | 12a87c6 | 2006-03-03 10:00:22 -0700 | [diff] [blame] | 2409 | u32 queues; |
Dale Farnsworth | 9f8dd31 | 2006-01-27 01:10:47 -0700 | [diff] [blame] | 2410 | |
| 2411 | /* Stop Rx port activity. Check port Rx activity. */ |
Dale Farnsworth | 12a87c6 | 2006-03-03 10:00:22 -0700 | [diff] [blame] | 2412 | queues = mv_read(MV643XX_ETH_RECEIVE_QUEUE_COMMAND_REG(port_num)) |
Dale Farnsworth | e38fd1a | 2006-03-03 09:59:28 -0700 | [diff] [blame] | 2413 | & 0xFF; |
Dale Farnsworth | 12a87c6 | 2006-03-03 10:00:22 -0700 | [diff] [blame] | 2414 | if (queues) { |
| 2415 | /* Issue stop command for active queues only */ |
Dale Farnsworth | 9f8dd31 | 2006-01-27 01:10:47 -0700 | [diff] [blame] | 2416 | mv_write(MV643XX_ETH_RECEIVE_QUEUE_COMMAND_REG(port_num), |
Dale Farnsworth | 12a87c6 | 2006-03-03 10:00:22 -0700 | [diff] [blame] | 2417 | (queues << 8)); |
Dale Farnsworth | 9f8dd31 | 2006-01-27 01:10:47 -0700 | [diff] [blame] | 2418 | |
| 2419 | /* Wait for all Rx activity to terminate. */ |
| 2420 | /* Check port cause register that all Rx queues are stopped */ |
| 2421 | while (mv_read(MV643XX_ETH_RECEIVE_QUEUE_COMMAND_REG(port_num)) |
| 2422 | & 0xFF) |
| 2423 | udelay(PHY_WAIT_MICRO_SECONDS); |
| 2424 | } |
| 2425 | |
Dale Farnsworth | 12a87c6 | 2006-03-03 10:00:22 -0700 | [diff] [blame] | 2426 | return queues; |
Dale Farnsworth | 9f8dd31 | 2006-01-27 01:10:47 -0700 | [diff] [blame] | 2427 | } |
| 2428 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2429 | /* |
| 2430 | * eth_port_reset - Reset Ethernet port |
| 2431 | * |
| 2432 | * DESCRIPTION: |
| 2433 | * This routine resets the chip by aborting any SDMA engine activity and |
| 2434 | * clearing the MIB counters. The Receiver and the Transmit unit are in |
| 2435 | * idle state after this command is performed and the port is disabled. |
| 2436 | * |
| 2437 | * INPUT: |
| 2438 | * unsigned int eth_port_num Ethernet Port number. |
| 2439 | * |
| 2440 | * OUTPUT: |
| 2441 | * Channel activity is halted. |
| 2442 | * |
| 2443 | * RETURN: |
| 2444 | * None. |
| 2445 | * |
| 2446 | */ |
| 2447 | static void eth_port_reset(unsigned int port_num) |
| 2448 | { |
| 2449 | unsigned int reg_data; |
| 2450 | |
Dale Farnsworth | 9f8dd31 | 2006-01-27 01:10:47 -0700 | [diff] [blame] | 2451 | mv643xx_eth_port_disable_tx(port_num); |
| 2452 | mv643xx_eth_port_disable_rx(port_num); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2453 | |
| 2454 | /* Clear all MIB counters */ |
| 2455 | eth_clear_mib_counters(port_num); |
| 2456 | |
| 2457 | /* Reset the Enable bit in the Configuration Register */ |
| 2458 | reg_data = mv_read(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num)); |
James Chapman | d0412d9 | 2006-01-27 01:15:30 -0700 | [diff] [blame] | 2459 | reg_data &= ~(MV643XX_ETH_SERIAL_PORT_ENABLE | |
| 2460 | MV643XX_ETH_DO_NOT_FORCE_LINK_FAIL | |
| 2461 | MV643XX_ETH_FORCE_LINK_PASS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2462 | mv_write(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num), reg_data); |
| 2463 | } |
| 2464 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2465 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2466 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2467 | * eth_port_read_smi_reg - Read PHY registers |
| 2468 | * |
| 2469 | * DESCRIPTION: |
| 2470 | * This routine utilize the SMI interface to interact with the PHY in |
| 2471 | * order to perform PHY register read. |
| 2472 | * |
| 2473 | * INPUT: |
| 2474 | * unsigned int port_num Ethernet Port number. |
| 2475 | * unsigned int phy_reg PHY register address offset. |
| 2476 | * unsigned int *value Register value buffer. |
| 2477 | * |
| 2478 | * OUTPUT: |
| 2479 | * Write the value of a specified PHY register into given buffer. |
| 2480 | * |
| 2481 | * RETURN: |
| 2482 | * false if the PHY is busy or read data is not in valid state. |
| 2483 | * true otherwise. |
| 2484 | * |
| 2485 | */ |
| 2486 | static void eth_port_read_smi_reg(unsigned int port_num, |
| 2487 | unsigned int phy_reg, unsigned int *value) |
| 2488 | { |
| 2489 | int phy_addr = ethernet_phy_get(port_num); |
| 2490 | unsigned long flags; |
| 2491 | int i; |
| 2492 | |
| 2493 | /* the SMI register is a shared resource */ |
| 2494 | spin_lock_irqsave(&mv643xx_eth_phy_lock, flags); |
| 2495 | |
| 2496 | /* wait for the SMI register to become available */ |
| 2497 | for (i = 0; mv_read(MV643XX_ETH_SMI_REG) & ETH_SMI_BUSY; i++) { |
| 2498 | if (i == PHY_WAIT_ITERATIONS) { |
| 2499 | printk("mv643xx PHY busy timeout, port %d\n", port_num); |
| 2500 | goto out; |
| 2501 | } |
| 2502 | udelay(PHY_WAIT_MICRO_SECONDS); |
| 2503 | } |
| 2504 | |
| 2505 | mv_write(MV643XX_ETH_SMI_REG, |
| 2506 | (phy_addr << 16) | (phy_reg << 21) | ETH_SMI_OPCODE_READ); |
| 2507 | |
| 2508 | /* now wait for the data to be valid */ |
| 2509 | for (i = 0; !(mv_read(MV643XX_ETH_SMI_REG) & ETH_SMI_READ_VALID); i++) { |
| 2510 | if (i == PHY_WAIT_ITERATIONS) { |
| 2511 | printk("mv643xx PHY read timeout, port %d\n", port_num); |
| 2512 | goto out; |
| 2513 | } |
| 2514 | udelay(PHY_WAIT_MICRO_SECONDS); |
| 2515 | } |
| 2516 | |
| 2517 | *value = mv_read(MV643XX_ETH_SMI_REG) & 0xffff; |
| 2518 | out: |
| 2519 | spin_unlock_irqrestore(&mv643xx_eth_phy_lock, flags); |
| 2520 | } |
| 2521 | |
| 2522 | /* |
| 2523 | * eth_port_write_smi_reg - Write to PHY registers |
| 2524 | * |
| 2525 | * DESCRIPTION: |
| 2526 | * This routine utilize the SMI interface to interact with the PHY in |
| 2527 | * order to perform writes to PHY registers. |
| 2528 | * |
| 2529 | * INPUT: |
| 2530 | * unsigned int eth_port_num Ethernet Port number. |
| 2531 | * unsigned int phy_reg PHY register address offset. |
| 2532 | * unsigned int value Register value. |
| 2533 | * |
| 2534 | * OUTPUT: |
| 2535 | * Write the given value to the specified PHY register. |
| 2536 | * |
| 2537 | * RETURN: |
| 2538 | * false if the PHY is busy. |
| 2539 | * true otherwise. |
| 2540 | * |
| 2541 | */ |
| 2542 | static void eth_port_write_smi_reg(unsigned int eth_port_num, |
| 2543 | unsigned int phy_reg, unsigned int value) |
| 2544 | { |
| 2545 | int phy_addr; |
| 2546 | int i; |
| 2547 | unsigned long flags; |
| 2548 | |
| 2549 | phy_addr = ethernet_phy_get(eth_port_num); |
| 2550 | |
| 2551 | /* the SMI register is a shared resource */ |
| 2552 | spin_lock_irqsave(&mv643xx_eth_phy_lock, flags); |
| 2553 | |
| 2554 | /* wait for the SMI register to become available */ |
| 2555 | for (i = 0; mv_read(MV643XX_ETH_SMI_REG) & ETH_SMI_BUSY; i++) { |
| 2556 | if (i == PHY_WAIT_ITERATIONS) { |
| 2557 | printk("mv643xx PHY busy timeout, port %d\n", |
| 2558 | eth_port_num); |
| 2559 | goto out; |
| 2560 | } |
| 2561 | udelay(PHY_WAIT_MICRO_SECONDS); |
| 2562 | } |
| 2563 | |
| 2564 | mv_write(MV643XX_ETH_SMI_REG, (phy_addr << 16) | (phy_reg << 21) | |
| 2565 | ETH_SMI_OPCODE_WRITE | (value & 0xffff)); |
| 2566 | out: |
| 2567 | spin_unlock_irqrestore(&mv643xx_eth_phy_lock, flags); |
| 2568 | } |
| 2569 | |
| 2570 | /* |
James Chapman | c28a4f8 | 2006-01-27 01:13:15 -0700 | [diff] [blame] | 2571 | * Wrappers for MII support library. |
| 2572 | */ |
| 2573 | static int mv643xx_mdio_read(struct net_device *dev, int phy_id, int location) |
| 2574 | { |
| 2575 | int val; |
| 2576 | struct mv643xx_private *mp = netdev_priv(dev); |
| 2577 | |
| 2578 | eth_port_read_smi_reg(mp->port_num, location, &val); |
| 2579 | return val; |
| 2580 | } |
| 2581 | |
| 2582 | static void mv643xx_mdio_write(struct net_device *dev, int phy_id, int location, int val) |
| 2583 | { |
| 2584 | struct mv643xx_private *mp = netdev_priv(dev); |
| 2585 | eth_port_write_smi_reg(mp->port_num, location, val); |
| 2586 | } |
| 2587 | |
| 2588 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2589 | * eth_port_receive - Get received information from Rx ring. |
| 2590 | * |
| 2591 | * DESCRIPTION: |
| 2592 | * This routine returns the received data to the caller. There is no |
| 2593 | * data copying during routine operation. All information is returned |
| 2594 | * using pointer to packet information struct passed from the caller. |
| 2595 | * If the routine exhausts Rx ring resources then the resource error flag |
| 2596 | * is set. |
| 2597 | * |
| 2598 | * INPUT: |
| 2599 | * struct mv643xx_private *mp Ethernet Port Control srtuct. |
| 2600 | * struct pkt_info *p_pkt_info User packet buffer. |
| 2601 | * |
| 2602 | * OUTPUT: |
| 2603 | * Rx ring current and used indexes are updated. |
| 2604 | * |
| 2605 | * RETURN: |
| 2606 | * ETH_ERROR in case the routine can not access Rx desc ring. |
| 2607 | * ETH_QUEUE_FULL if Rx ring resources are exhausted. |
| 2608 | * ETH_END_OF_JOB if there is no received data. |
| 2609 | * ETH_OK otherwise. |
| 2610 | */ |
| 2611 | static ETH_FUNC_RET_STATUS eth_port_receive(struct mv643xx_private *mp, |
| 2612 | struct pkt_info *p_pkt_info) |
| 2613 | { |
| 2614 | int rx_next_curr_desc, rx_curr_desc, rx_used_desc; |
| 2615 | volatile struct eth_rx_desc *p_rx_desc; |
| 2616 | unsigned int command_status; |
Dale Farnsworth | 8f51870 | 2006-01-16 16:56:30 -0700 | [diff] [blame] | 2617 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2618 | |
| 2619 | /* Do not process Rx ring in case of Rx ring resource error */ |
| 2620 | if (mp->rx_resource_err) |
| 2621 | return ETH_QUEUE_FULL; |
| 2622 | |
Dale Farnsworth | 8f51870 | 2006-01-16 16:56:30 -0700 | [diff] [blame] | 2623 | spin_lock_irqsave(&mp->lock, flags); |
| 2624 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2625 | /* Get the Rx Desc ring 'curr and 'used' indexes */ |
| 2626 | rx_curr_desc = mp->rx_curr_desc_q; |
| 2627 | rx_used_desc = mp->rx_used_desc_q; |
| 2628 | |
| 2629 | p_rx_desc = &mp->p_rx_desc_area[rx_curr_desc]; |
| 2630 | |
| 2631 | /* The following parameters are used to save readings from memory */ |
| 2632 | command_status = p_rx_desc->cmd_sts; |
| 2633 | rmb(); |
| 2634 | |
| 2635 | /* Nothing to receive... */ |
Dale Farnsworth | 8f51870 | 2006-01-16 16:56:30 -0700 | [diff] [blame] | 2636 | if (command_status & (ETH_BUFFER_OWNED_BY_DMA)) { |
| 2637 | spin_unlock_irqrestore(&mp->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2638 | return ETH_END_OF_JOB; |
Dale Farnsworth | 8f51870 | 2006-01-16 16:56:30 -0700 | [diff] [blame] | 2639 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2640 | |
| 2641 | p_pkt_info->byte_cnt = (p_rx_desc->byte_cnt) - RX_BUF_OFFSET; |
| 2642 | p_pkt_info->cmd_sts = command_status; |
| 2643 | p_pkt_info->buf_ptr = (p_rx_desc->buf_ptr) + RX_BUF_OFFSET; |
| 2644 | p_pkt_info->return_info = mp->rx_skb[rx_curr_desc]; |
| 2645 | p_pkt_info->l4i_chk = p_rx_desc->buf_size; |
| 2646 | |
Dale Farnsworth | b4de905 | 2006-01-27 01:04:43 -0700 | [diff] [blame] | 2647 | /* |
| 2648 | * Clean the return info field to indicate that the |
| 2649 | * packet has been moved to the upper layers |
| 2650 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2651 | mp->rx_skb[rx_curr_desc] = NULL; |
| 2652 | |
| 2653 | /* Update current index in data structure */ |
| 2654 | rx_next_curr_desc = (rx_curr_desc + 1) % mp->rx_ring_size; |
| 2655 | mp->rx_curr_desc_q = rx_next_curr_desc; |
| 2656 | |
| 2657 | /* Rx descriptors exhausted. Set the Rx ring resource error flag */ |
| 2658 | if (rx_next_curr_desc == rx_used_desc) |
| 2659 | mp->rx_resource_err = 1; |
| 2660 | |
Dale Farnsworth | 8f51870 | 2006-01-16 16:56:30 -0700 | [diff] [blame] | 2661 | spin_unlock_irqrestore(&mp->lock, flags); |
| 2662 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2663 | return ETH_OK; |
| 2664 | } |
| 2665 | |
| 2666 | /* |
| 2667 | * eth_rx_return_buff - Returns a Rx buffer back to the Rx ring. |
| 2668 | * |
| 2669 | * DESCRIPTION: |
| 2670 | * This routine returns a Rx buffer back to the Rx ring. It retrieves the |
| 2671 | * next 'used' descriptor and attached the returned buffer to it. |
| 2672 | * In case the Rx ring was in "resource error" condition, where there are |
| 2673 | * no available Rx resources, the function resets the resource error flag. |
| 2674 | * |
| 2675 | * INPUT: |
| 2676 | * struct mv643xx_private *mp Ethernet Port Control srtuct. |
| 2677 | * struct pkt_info *p_pkt_info Information on returned buffer. |
| 2678 | * |
| 2679 | * OUTPUT: |
| 2680 | * New available Rx resource in Rx descriptor ring. |
| 2681 | * |
| 2682 | * RETURN: |
| 2683 | * ETH_ERROR in case the routine can not access Rx desc ring. |
| 2684 | * ETH_OK otherwise. |
| 2685 | */ |
| 2686 | static ETH_FUNC_RET_STATUS eth_rx_return_buff(struct mv643xx_private *mp, |
| 2687 | struct pkt_info *p_pkt_info) |
| 2688 | { |
| 2689 | int used_rx_desc; /* Where to return Rx resource */ |
| 2690 | volatile struct eth_rx_desc *p_used_rx_desc; |
Dale Farnsworth | 8f51870 | 2006-01-16 16:56:30 -0700 | [diff] [blame] | 2691 | unsigned long flags; |
| 2692 | |
| 2693 | spin_lock_irqsave(&mp->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2694 | |
| 2695 | /* Get 'used' Rx descriptor */ |
| 2696 | used_rx_desc = mp->rx_used_desc_q; |
| 2697 | p_used_rx_desc = &mp->p_rx_desc_area[used_rx_desc]; |
| 2698 | |
| 2699 | p_used_rx_desc->buf_ptr = p_pkt_info->buf_ptr; |
| 2700 | p_used_rx_desc->buf_size = p_pkt_info->byte_cnt; |
| 2701 | mp->rx_skb[used_rx_desc] = p_pkt_info->return_info; |
| 2702 | |
| 2703 | /* Flush the write pipe */ |
| 2704 | |
| 2705 | /* Return the descriptor to DMA ownership */ |
| 2706 | wmb(); |
| 2707 | p_used_rx_desc->cmd_sts = |
| 2708 | ETH_BUFFER_OWNED_BY_DMA | ETH_RX_ENABLE_INTERRUPT; |
| 2709 | wmb(); |
| 2710 | |
| 2711 | /* Move the used descriptor pointer to the next descriptor */ |
| 2712 | mp->rx_used_desc_q = (used_rx_desc + 1) % mp->rx_ring_size; |
| 2713 | |
| 2714 | /* Any Rx return cancels the Rx resource error status */ |
| 2715 | mp->rx_resource_err = 0; |
| 2716 | |
Dale Farnsworth | 8f51870 | 2006-01-16 16:56:30 -0700 | [diff] [blame] | 2717 | spin_unlock_irqrestore(&mp->lock, flags); |
| 2718 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2719 | return ETH_OK; |
| 2720 | } |
| 2721 | |
| 2722 | /************* Begin ethtool support *************************/ |
| 2723 | |
| 2724 | struct mv643xx_stats { |
| 2725 | char stat_string[ETH_GSTRING_LEN]; |
| 2726 | int sizeof_stat; |
| 2727 | int stat_offset; |
| 2728 | }; |
| 2729 | |
| 2730 | #define MV643XX_STAT(m) sizeof(((struct mv643xx_private *)0)->m), \ |
Dale Farnsworth | b4de905 | 2006-01-27 01:04:43 -0700 | [diff] [blame] | 2731 | offsetof(struct mv643xx_private, m) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2732 | |
| 2733 | static const struct mv643xx_stats mv643xx_gstrings_stats[] = { |
| 2734 | { "rx_packets", MV643XX_STAT(stats.rx_packets) }, |
| 2735 | { "tx_packets", MV643XX_STAT(stats.tx_packets) }, |
| 2736 | { "rx_bytes", MV643XX_STAT(stats.rx_bytes) }, |
| 2737 | { "tx_bytes", MV643XX_STAT(stats.tx_bytes) }, |
| 2738 | { "rx_errors", MV643XX_STAT(stats.rx_errors) }, |
| 2739 | { "tx_errors", MV643XX_STAT(stats.tx_errors) }, |
| 2740 | { "rx_dropped", MV643XX_STAT(stats.rx_dropped) }, |
| 2741 | { "tx_dropped", MV643XX_STAT(stats.tx_dropped) }, |
| 2742 | { "good_octets_received", MV643XX_STAT(mib_counters.good_octets_received) }, |
| 2743 | { "bad_octets_received", MV643XX_STAT(mib_counters.bad_octets_received) }, |
| 2744 | { "internal_mac_transmit_err", MV643XX_STAT(mib_counters.internal_mac_transmit_err) }, |
| 2745 | { "good_frames_received", MV643XX_STAT(mib_counters.good_frames_received) }, |
| 2746 | { "bad_frames_received", MV643XX_STAT(mib_counters.bad_frames_received) }, |
| 2747 | { "broadcast_frames_received", MV643XX_STAT(mib_counters.broadcast_frames_received) }, |
| 2748 | { "multicast_frames_received", MV643XX_STAT(mib_counters.multicast_frames_received) }, |
| 2749 | { "frames_64_octets", MV643XX_STAT(mib_counters.frames_64_octets) }, |
| 2750 | { "frames_65_to_127_octets", MV643XX_STAT(mib_counters.frames_65_to_127_octets) }, |
| 2751 | { "frames_128_to_255_octets", MV643XX_STAT(mib_counters.frames_128_to_255_octets) }, |
| 2752 | { "frames_256_to_511_octets", MV643XX_STAT(mib_counters.frames_256_to_511_octets) }, |
| 2753 | { "frames_512_to_1023_octets", MV643XX_STAT(mib_counters.frames_512_to_1023_octets) }, |
| 2754 | { "frames_1024_to_max_octets", MV643XX_STAT(mib_counters.frames_1024_to_max_octets) }, |
| 2755 | { "good_octets_sent", MV643XX_STAT(mib_counters.good_octets_sent) }, |
| 2756 | { "good_frames_sent", MV643XX_STAT(mib_counters.good_frames_sent) }, |
| 2757 | { "excessive_collision", MV643XX_STAT(mib_counters.excessive_collision) }, |
| 2758 | { "multicast_frames_sent", MV643XX_STAT(mib_counters.multicast_frames_sent) }, |
| 2759 | { "broadcast_frames_sent", MV643XX_STAT(mib_counters.broadcast_frames_sent) }, |
| 2760 | { "unrec_mac_control_received", MV643XX_STAT(mib_counters.unrec_mac_control_received) }, |
| 2761 | { "fc_sent", MV643XX_STAT(mib_counters.fc_sent) }, |
| 2762 | { "good_fc_received", MV643XX_STAT(mib_counters.good_fc_received) }, |
| 2763 | { "bad_fc_received", MV643XX_STAT(mib_counters.bad_fc_received) }, |
| 2764 | { "undersize_received", MV643XX_STAT(mib_counters.undersize_received) }, |
| 2765 | { "fragments_received", MV643XX_STAT(mib_counters.fragments_received) }, |
| 2766 | { "oversize_received", MV643XX_STAT(mib_counters.oversize_received) }, |
| 2767 | { "jabber_received", MV643XX_STAT(mib_counters.jabber_received) }, |
| 2768 | { "mac_receive_error", MV643XX_STAT(mib_counters.mac_receive_error) }, |
| 2769 | { "bad_crc_event", MV643XX_STAT(mib_counters.bad_crc_event) }, |
| 2770 | { "collision", MV643XX_STAT(mib_counters.collision) }, |
| 2771 | { "late_collision", MV643XX_STAT(mib_counters.late_collision) }, |
| 2772 | }; |
| 2773 | |
| 2774 | #define MV643XX_STATS_LEN \ |
| 2775 | sizeof(mv643xx_gstrings_stats) / sizeof(struct mv643xx_stats) |
| 2776 | |
Dale Farnsworth | b4de905 | 2006-01-27 01:04:43 -0700 | [diff] [blame] | 2777 | static void mv643xx_get_drvinfo(struct net_device *netdev, |
| 2778 | struct ethtool_drvinfo *drvinfo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2779 | { |
| 2780 | strncpy(drvinfo->driver, mv643xx_driver_name, 32); |
| 2781 | strncpy(drvinfo->version, mv643xx_driver_version, 32); |
| 2782 | strncpy(drvinfo->fw_version, "N/A", 32); |
| 2783 | strncpy(drvinfo->bus_info, "mv643xx", 32); |
| 2784 | drvinfo->n_stats = MV643XX_STATS_LEN; |
| 2785 | } |
| 2786 | |
Dale Farnsworth | b4de905 | 2006-01-27 01:04:43 -0700 | [diff] [blame] | 2787 | static int mv643xx_get_stats_count(struct net_device *netdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2788 | { |
| 2789 | return MV643XX_STATS_LEN; |
| 2790 | } |
| 2791 | |
Dale Farnsworth | b4de905 | 2006-01-27 01:04:43 -0700 | [diff] [blame] | 2792 | static void mv643xx_get_ethtool_stats(struct net_device *netdev, |
| 2793 | struct ethtool_stats *stats, uint64_t *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2794 | { |
| 2795 | struct mv643xx_private *mp = netdev->priv; |
| 2796 | int i; |
| 2797 | |
| 2798 | eth_update_mib_counters(mp); |
| 2799 | |
Dale Farnsworth | b4de905 | 2006-01-27 01:04:43 -0700 | [diff] [blame] | 2800 | for (i = 0; i < MV643XX_STATS_LEN; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2801 | char *p = (char *)mp+mv643xx_gstrings_stats[i].stat_offset; |
Dale Farnsworth | b4de905 | 2006-01-27 01:04:43 -0700 | [diff] [blame] | 2802 | data[i] = (mv643xx_gstrings_stats[i].sizeof_stat == |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2803 | sizeof(uint64_t)) ? *(uint64_t *)p : *(uint32_t *)p; |
| 2804 | } |
| 2805 | } |
| 2806 | |
Dale Farnsworth | b4de905 | 2006-01-27 01:04:43 -0700 | [diff] [blame] | 2807 | static void mv643xx_get_strings(struct net_device *netdev, uint32_t stringset, |
| 2808 | uint8_t *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2809 | { |
| 2810 | int i; |
| 2811 | |
| 2812 | switch(stringset) { |
| 2813 | case ETH_SS_STATS: |
| 2814 | for (i=0; i < MV643XX_STATS_LEN; i++) { |
Dale Farnsworth | b4de905 | 2006-01-27 01:04:43 -0700 | [diff] [blame] | 2815 | memcpy(data + i * ETH_GSTRING_LEN, |
| 2816 | mv643xx_gstrings_stats[i].stat_string, |
| 2817 | ETH_GSTRING_LEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2818 | } |
| 2819 | break; |
| 2820 | } |
| 2821 | } |
| 2822 | |
James Chapman | d0412d9 | 2006-01-27 01:15:30 -0700 | [diff] [blame] | 2823 | static u32 mv643xx_eth_get_link(struct net_device *dev) |
| 2824 | { |
| 2825 | struct mv643xx_private *mp = netdev_priv(dev); |
| 2826 | |
| 2827 | return mii_link_ok(&mp->mii); |
| 2828 | } |
| 2829 | |
| 2830 | static int mv643xx_eth_nway_restart(struct net_device *dev) |
| 2831 | { |
| 2832 | struct mv643xx_private *mp = netdev_priv(dev); |
| 2833 | |
| 2834 | return mii_nway_restart(&mp->mii); |
| 2835 | } |
| 2836 | |
| 2837 | static int mv643xx_eth_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
| 2838 | { |
| 2839 | struct mv643xx_private *mp = netdev_priv(dev); |
| 2840 | |
| 2841 | return generic_mii_ioctl(&mp->mii, if_mii(ifr), cmd, NULL); |
| 2842 | } |
| 2843 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2844 | static struct ethtool_ops mv643xx_ethtool_ops = { |
| 2845 | .get_settings = mv643xx_get_settings, |
James Chapman | d0412d9 | 2006-01-27 01:15:30 -0700 | [diff] [blame] | 2846 | .set_settings = mv643xx_set_settings, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2847 | .get_drvinfo = mv643xx_get_drvinfo, |
James Chapman | d0412d9 | 2006-01-27 01:15:30 -0700 | [diff] [blame] | 2848 | .get_link = mv643xx_eth_get_link, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2849 | .get_sg = ethtool_op_get_sg, |
| 2850 | .set_sg = ethtool_op_set_sg, |
| 2851 | .get_strings = mv643xx_get_strings, |
| 2852 | .get_stats_count = mv643xx_get_stats_count, |
| 2853 | .get_ethtool_stats = mv643xx_get_ethtool_stats, |
James Chapman | d0412d9 | 2006-01-27 01:15:30 -0700 | [diff] [blame] | 2854 | .get_strings = mv643xx_get_strings, |
| 2855 | .get_stats_count = mv643xx_get_stats_count, |
| 2856 | .get_ethtool_stats = mv643xx_get_ethtool_stats, |
| 2857 | .nway_reset = mv643xx_eth_nway_restart, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2858 | }; |
| 2859 | |
| 2860 | /************* End ethtool support *************************/ |