Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Network device driver for the MACE ethernet controller on |
| 3 | * Apple Powermacs. Assumes it's under a DBDMA controller. |
| 4 | * |
| 5 | * Copyright (C) 1996 Paul Mackerras. |
| 6 | */ |
| 7 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | #include <linux/module.h> |
| 9 | #include <linux/kernel.h> |
| 10 | #include <linux/netdevice.h> |
| 11 | #include <linux/etherdevice.h> |
| 12 | #include <linux/delay.h> |
| 13 | #include <linux/string.h> |
| 14 | #include <linux/timer.h> |
| 15 | #include <linux/init.h> |
| 16 | #include <linux/crc32.h> |
| 17 | #include <linux/spinlock.h> |
Akinobu Mita | bc63eb9 | 2006-12-19 13:09:08 -0800 | [diff] [blame] | 18 | #include <linux/bitrev.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 19 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include <asm/prom.h> |
| 21 | #include <asm/dbdma.h> |
| 22 | #include <asm/io.h> |
| 23 | #include <asm/pgtable.h> |
| 24 | #include <asm/macio.h> |
| 25 | |
| 26 | #include "mace.h" |
| 27 | |
| 28 | static int port_aaui = -1; |
| 29 | |
| 30 | #define N_RX_RING 8 |
| 31 | #define N_TX_RING 6 |
| 32 | #define MAX_TX_ACTIVE 1 |
| 33 | #define NCMDS_TX 1 /* dma commands per element in tx ring */ |
| 34 | #define RX_BUFLEN (ETH_FRAME_LEN + 8) |
| 35 | #define TX_TIMEOUT HZ /* 1 second */ |
| 36 | |
| 37 | /* Chip rev needs workaround on HW & multicast addr change */ |
| 38 | #define BROKEN_ADDRCHG_REV 0x0941 |
| 39 | |
| 40 | /* Bits in transmit DMA status */ |
| 41 | #define TX_DMA_ERR 0x80 |
| 42 | |
| 43 | struct mace_data { |
| 44 | volatile struct mace __iomem *mace; |
| 45 | volatile struct dbdma_regs __iomem *tx_dma; |
| 46 | int tx_dma_intr; |
| 47 | volatile struct dbdma_regs __iomem *rx_dma; |
| 48 | int rx_dma_intr; |
| 49 | volatile struct dbdma_cmd *tx_cmds; /* xmit dma command list */ |
| 50 | volatile struct dbdma_cmd *rx_cmds; /* recv dma command list */ |
| 51 | struct sk_buff *rx_bufs[N_RX_RING]; |
| 52 | int rx_fill; |
| 53 | int rx_empty; |
| 54 | struct sk_buff *tx_bufs[N_TX_RING]; |
| 55 | int tx_fill; |
| 56 | int tx_empty; |
| 57 | unsigned char maccc; |
| 58 | unsigned char tx_fullup; |
| 59 | unsigned char tx_active; |
| 60 | unsigned char tx_bad_runt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | struct timer_list tx_timeout; |
| 62 | int timeout_active; |
| 63 | int port_aaui; |
| 64 | int chipid; |
| 65 | struct macio_dev *mdev; |
| 66 | spinlock_t lock; |
| 67 | }; |
| 68 | |
| 69 | /* |
| 70 | * Number of bytes of private data per MACE: allow enough for |
| 71 | * the rx and tx dma commands plus a branch dma command each, |
| 72 | * and another 16 bytes to allow us to align the dma command |
| 73 | * buffers on a 16 byte boundary. |
| 74 | */ |
| 75 | #define PRIV_BYTES (sizeof(struct mace_data) \ |
| 76 | + (N_RX_RING + NCMDS_TX * N_TX_RING + 3) * sizeof(struct dbdma_cmd)) |
| 77 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | static int mace_open(struct net_device *dev); |
| 79 | static int mace_close(struct net_device *dev); |
| 80 | static int mace_xmit_start(struct sk_buff *skb, struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | static void mace_set_multicast(struct net_device *dev); |
| 82 | static void mace_reset(struct net_device *dev); |
| 83 | static int mace_set_address(struct net_device *dev, void *addr); |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 84 | static irqreturn_t mace_interrupt(int irq, void *dev_id); |
| 85 | static irqreturn_t mace_txdma_intr(int irq, void *dev_id); |
| 86 | static irqreturn_t mace_rxdma_intr(int irq, void *dev_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | static void mace_set_timeout(struct net_device *dev); |
| 88 | static void mace_tx_timeout(unsigned long data); |
| 89 | static inline void dbdma_reset(volatile struct dbdma_regs __iomem *dma); |
| 90 | static inline void mace_clean_rings(struct mace_data *mp); |
| 91 | static void __mace_set_address(struct net_device *dev, void *addr); |
| 92 | |
| 93 | /* |
| 94 | * If we can't get a skbuff when we need it, we use this area for DMA. |
| 95 | */ |
| 96 | static unsigned char *dummy_buf; |
| 97 | |
Alexander Beregalov | 488b4ab | 2009-04-15 12:52:48 +0000 | [diff] [blame] | 98 | static const struct net_device_ops mace_netdev_ops = { |
| 99 | .ndo_open = mace_open, |
| 100 | .ndo_stop = mace_close, |
| 101 | .ndo_start_xmit = mace_xmit_start, |
| 102 | .ndo_set_multicast_list = mace_set_multicast, |
| 103 | .ndo_set_mac_address = mace_set_address, |
| 104 | .ndo_change_mtu = eth_change_mtu, |
| 105 | .ndo_validate_addr = eth_validate_addr, |
| 106 | }; |
| 107 | |
Jeff Mahoney | 5e65577 | 2005-07-06 15:44:41 -0400 | [diff] [blame] | 108 | static int __devinit mace_probe(struct macio_dev *mdev, const struct of_device_id *match) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | { |
| 110 | struct device_node *mace = macio_get_of_node(mdev); |
| 111 | struct net_device *dev; |
| 112 | struct mace_data *mp; |
Jeremy Kerr | 1a2509c | 2006-07-12 15:41:03 +1000 | [diff] [blame] | 113 | const unsigned char *addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | int j, rev, rc = -EBUSY; |
| 115 | |
| 116 | if (macio_resource_count(mdev) != 3 || macio_irq_count(mdev) != 3) { |
| 117 | printk(KERN_ERR "can't use MACE %s: need 3 addrs and 3 irqs\n", |
| 118 | mace->full_name); |
| 119 | return -ENODEV; |
| 120 | } |
| 121 | |
Stephen Rothwell | 40cd3a4 | 2007-05-01 13:54:02 +1000 | [diff] [blame] | 122 | addr = of_get_property(mace, "mac-address", NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | if (addr == NULL) { |
Stephen Rothwell | 40cd3a4 | 2007-05-01 13:54:02 +1000 | [diff] [blame] | 124 | addr = of_get_property(mace, "local-mac-address", NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | if (addr == NULL) { |
| 126 | printk(KERN_ERR "Can't get mac-address for MACE %s\n", |
| 127 | mace->full_name); |
| 128 | return -ENODEV; |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | /* |
| 133 | * lazy allocate the driver-wide dummy buffer. (Note that we |
| 134 | * never have more than one MACE in the system anyway) |
| 135 | */ |
| 136 | if (dummy_buf == NULL) { |
| 137 | dummy_buf = kmalloc(RX_BUFLEN+2, GFP_KERNEL); |
| 138 | if (dummy_buf == NULL) { |
| 139 | printk(KERN_ERR "MACE: couldn't allocate dummy buffer\n"); |
| 140 | return -ENOMEM; |
| 141 | } |
| 142 | } |
| 143 | |
| 144 | if (macio_request_resources(mdev, "mace")) { |
| 145 | printk(KERN_ERR "MACE: can't request IO resources !\n"); |
| 146 | return -EBUSY; |
| 147 | } |
| 148 | |
| 149 | dev = alloc_etherdev(PRIV_BYTES); |
| 150 | if (!dev) { |
| 151 | printk(KERN_ERR "MACE: can't allocate ethernet device !\n"); |
| 152 | rc = -ENOMEM; |
| 153 | goto err_release; |
| 154 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | SET_NETDEV_DEV(dev, &mdev->ofdev.dev); |
| 156 | |
Wang Chen | 454d7c9 | 2008-11-12 23:37:49 -0800 | [diff] [blame] | 157 | mp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | mp->mdev = mdev; |
| 159 | macio_set_drvdata(mdev, dev); |
| 160 | |
| 161 | dev->base_addr = macio_resource_start(mdev, 0); |
| 162 | mp->mace = ioremap(dev->base_addr, 0x1000); |
| 163 | if (mp->mace == NULL) { |
| 164 | printk(KERN_ERR "MACE: can't map IO resources !\n"); |
| 165 | rc = -ENOMEM; |
| 166 | goto err_free; |
| 167 | } |
| 168 | dev->irq = macio_irq(mdev, 0); |
| 169 | |
| 170 | rev = addr[0] == 0 && addr[1] == 0xA0; |
| 171 | for (j = 0; j < 6; ++j) { |
Akinobu Mita | bc63eb9 | 2006-12-19 13:09:08 -0800 | [diff] [blame] | 172 | dev->dev_addr[j] = rev ? bitrev8(addr[j]): addr[j]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | } |
| 174 | mp->chipid = (in_8(&mp->mace->chipid_hi) << 8) | |
| 175 | in_8(&mp->mace->chipid_lo); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 176 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | |
Wang Chen | 454d7c9 | 2008-11-12 23:37:49 -0800 | [diff] [blame] | 178 | mp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | mp->maccc = ENXMT | ENRCV; |
| 180 | |
| 181 | mp->tx_dma = ioremap(macio_resource_start(mdev, 1), 0x1000); |
| 182 | if (mp->tx_dma == NULL) { |
| 183 | printk(KERN_ERR "MACE: can't map TX DMA resources !\n"); |
| 184 | rc = -ENOMEM; |
| 185 | goto err_unmap_io; |
| 186 | } |
| 187 | mp->tx_dma_intr = macio_irq(mdev, 1); |
| 188 | |
| 189 | mp->rx_dma = ioremap(macio_resource_start(mdev, 2), 0x1000); |
| 190 | if (mp->rx_dma == NULL) { |
| 191 | printk(KERN_ERR "MACE: can't map RX DMA resources !\n"); |
| 192 | rc = -ENOMEM; |
| 193 | goto err_unmap_tx_dma; |
| 194 | } |
| 195 | mp->rx_dma_intr = macio_irq(mdev, 2); |
| 196 | |
| 197 | mp->tx_cmds = (volatile struct dbdma_cmd *) DBDMA_ALIGN(mp + 1); |
| 198 | mp->rx_cmds = mp->tx_cmds + NCMDS_TX * N_TX_RING + 1; |
| 199 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | memset((char *) mp->tx_cmds, 0, |
| 201 | (NCMDS_TX*N_TX_RING + N_RX_RING + 2) * sizeof(struct dbdma_cmd)); |
| 202 | init_timer(&mp->tx_timeout); |
| 203 | spin_lock_init(&mp->lock); |
| 204 | mp->timeout_active = 0; |
| 205 | |
| 206 | if (port_aaui >= 0) |
| 207 | mp->port_aaui = port_aaui; |
| 208 | else { |
| 209 | /* Apple Network Server uses the AAUI port */ |
Grant Likely | 71a157e | 2010-02-01 21:34:14 -0700 | [diff] [blame] | 210 | if (of_machine_is_compatible("AAPL,ShinerESB")) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | mp->port_aaui = 1; |
| 212 | else { |
| 213 | #ifdef CONFIG_MACE_AAUI_PORT |
| 214 | mp->port_aaui = 1; |
| 215 | #else |
| 216 | mp->port_aaui = 0; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 217 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | } |
| 219 | } |
| 220 | |
Alexander Beregalov | 488b4ab | 2009-04-15 12:52:48 +0000 | [diff] [blame] | 221 | dev->netdev_ops = &mace_netdev_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | |
| 223 | /* |
| 224 | * Most of what is below could be moved to mace_open() |
| 225 | */ |
| 226 | mace_reset(dev); |
| 227 | |
| 228 | rc = request_irq(dev->irq, mace_interrupt, 0, "MACE", dev); |
| 229 | if (rc) { |
| 230 | printk(KERN_ERR "MACE: can't get irq %d\n", dev->irq); |
| 231 | goto err_unmap_rx_dma; |
| 232 | } |
| 233 | rc = request_irq(mp->tx_dma_intr, mace_txdma_intr, 0, "MACE-txdma", dev); |
| 234 | if (rc) { |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 235 | printk(KERN_ERR "MACE: can't get irq %d\n", mp->tx_dma_intr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | goto err_free_irq; |
| 237 | } |
| 238 | rc = request_irq(mp->rx_dma_intr, mace_rxdma_intr, 0, "MACE-rxdma", dev); |
| 239 | if (rc) { |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 240 | printk(KERN_ERR "MACE: can't get irq %d\n", mp->rx_dma_intr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | goto err_free_tx_irq; |
| 242 | } |
| 243 | |
| 244 | rc = register_netdev(dev); |
| 245 | if (rc) { |
| 246 | printk(KERN_ERR "MACE: Cannot register net device, aborting.\n"); |
| 247 | goto err_free_rx_irq; |
| 248 | } |
| 249 | |
Johannes Berg | e174961 | 2008-10-27 15:59:26 -0700 | [diff] [blame] | 250 | printk(KERN_INFO "%s: MACE at %pM, chip revision %d.%d\n", |
| 251 | dev->name, dev->dev_addr, |
Joe Perches | 0795af5 | 2007-10-03 17:59:30 -0700 | [diff] [blame] | 252 | mp->chipid >> 8, mp->chipid & 0xff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | |
| 254 | return 0; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 255 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | err_free_rx_irq: |
| 257 | free_irq(macio_irq(mdev, 2), dev); |
| 258 | err_free_tx_irq: |
| 259 | free_irq(macio_irq(mdev, 1), dev); |
| 260 | err_free_irq: |
| 261 | free_irq(macio_irq(mdev, 0), dev); |
| 262 | err_unmap_rx_dma: |
| 263 | iounmap(mp->rx_dma); |
| 264 | err_unmap_tx_dma: |
| 265 | iounmap(mp->tx_dma); |
| 266 | err_unmap_io: |
| 267 | iounmap(mp->mace); |
| 268 | err_free: |
| 269 | free_netdev(dev); |
| 270 | err_release: |
| 271 | macio_release_resources(mdev); |
| 272 | |
| 273 | return rc; |
| 274 | } |
| 275 | |
| 276 | static int __devexit mace_remove(struct macio_dev *mdev) |
| 277 | { |
| 278 | struct net_device *dev = macio_get_drvdata(mdev); |
| 279 | struct mace_data *mp; |
| 280 | |
| 281 | BUG_ON(dev == NULL); |
| 282 | |
| 283 | macio_set_drvdata(mdev, NULL); |
| 284 | |
Wang Chen | 454d7c9 | 2008-11-12 23:37:49 -0800 | [diff] [blame] | 285 | mp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | |
| 287 | unregister_netdev(dev); |
| 288 | |
| 289 | free_irq(dev->irq, dev); |
| 290 | free_irq(mp->tx_dma_intr, dev); |
| 291 | free_irq(mp->rx_dma_intr, dev); |
| 292 | |
| 293 | iounmap(mp->rx_dma); |
| 294 | iounmap(mp->tx_dma); |
| 295 | iounmap(mp->mace); |
| 296 | |
| 297 | free_netdev(dev); |
| 298 | |
| 299 | macio_release_resources(mdev); |
| 300 | |
| 301 | return 0; |
| 302 | } |
| 303 | |
| 304 | static void dbdma_reset(volatile struct dbdma_regs __iomem *dma) |
| 305 | { |
| 306 | int i; |
| 307 | |
| 308 | out_le32(&dma->control, (WAKE|FLUSH|PAUSE|RUN) << 16); |
| 309 | |
| 310 | /* |
| 311 | * Yes this looks peculiar, but apparently it needs to be this |
| 312 | * way on some machines. |
| 313 | */ |
| 314 | for (i = 200; i > 0; --i) |
| 315 | if (ld_le32(&dma->control) & RUN) |
| 316 | udelay(1); |
| 317 | } |
| 318 | |
| 319 | static void mace_reset(struct net_device *dev) |
| 320 | { |
Wang Chen | 454d7c9 | 2008-11-12 23:37:49 -0800 | [diff] [blame] | 321 | struct mace_data *mp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | volatile struct mace __iomem *mb = mp->mace; |
| 323 | int i; |
| 324 | |
| 325 | /* soft-reset the chip */ |
| 326 | i = 200; |
| 327 | while (--i) { |
| 328 | out_8(&mb->biucc, SWRST); |
| 329 | if (in_8(&mb->biucc) & SWRST) { |
| 330 | udelay(10); |
| 331 | continue; |
| 332 | } |
| 333 | break; |
| 334 | } |
| 335 | if (!i) { |
| 336 | printk(KERN_ERR "mace: cannot reset chip!\n"); |
| 337 | return; |
| 338 | } |
| 339 | |
| 340 | out_8(&mb->imr, 0xff); /* disable all intrs for now */ |
| 341 | i = in_8(&mb->ir); |
| 342 | out_8(&mb->maccc, 0); /* turn off tx, rx */ |
| 343 | |
| 344 | out_8(&mb->biucc, XMTSP_64); |
| 345 | out_8(&mb->utr, RTRD); |
| 346 | out_8(&mb->fifocc, RCVFW_32 | XMTFW_16 | XMTFWU | RCVFWU | XMTBRST); |
| 347 | out_8(&mb->xmtfc, AUTO_PAD_XMIT); /* auto-pad short frames */ |
| 348 | out_8(&mb->rcvfc, 0); |
| 349 | |
| 350 | /* load up the hardware address */ |
| 351 | __mace_set_address(dev, dev->dev_addr); |
| 352 | |
| 353 | /* clear the multicast filter */ |
| 354 | if (mp->chipid == BROKEN_ADDRCHG_REV) |
| 355 | out_8(&mb->iac, LOGADDR); |
| 356 | else { |
| 357 | out_8(&mb->iac, ADDRCHG | LOGADDR); |
| 358 | while ((in_8(&mb->iac) & ADDRCHG) != 0) |
| 359 | ; |
| 360 | } |
| 361 | for (i = 0; i < 8; ++i) |
| 362 | out_8(&mb->ladrf, 0); |
| 363 | |
| 364 | /* done changing address */ |
| 365 | if (mp->chipid != BROKEN_ADDRCHG_REV) |
| 366 | out_8(&mb->iac, 0); |
| 367 | |
| 368 | if (mp->port_aaui) |
| 369 | out_8(&mb->plscc, PORTSEL_AUI + ENPLSIO); |
| 370 | else |
| 371 | out_8(&mb->plscc, PORTSEL_GPSI + ENPLSIO); |
| 372 | } |
| 373 | |
| 374 | static void __mace_set_address(struct net_device *dev, void *addr) |
| 375 | { |
Wang Chen | 454d7c9 | 2008-11-12 23:37:49 -0800 | [diff] [blame] | 376 | struct mace_data *mp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | volatile struct mace __iomem *mb = mp->mace; |
| 378 | unsigned char *p = addr; |
| 379 | int i; |
| 380 | |
| 381 | /* load up the hardware address */ |
| 382 | if (mp->chipid == BROKEN_ADDRCHG_REV) |
| 383 | out_8(&mb->iac, PHYADDR); |
| 384 | else { |
| 385 | out_8(&mb->iac, ADDRCHG | PHYADDR); |
| 386 | while ((in_8(&mb->iac) & ADDRCHG) != 0) |
| 387 | ; |
| 388 | } |
| 389 | for (i = 0; i < 6; ++i) |
| 390 | out_8(&mb->padr, dev->dev_addr[i] = p[i]); |
| 391 | if (mp->chipid != BROKEN_ADDRCHG_REV) |
| 392 | out_8(&mb->iac, 0); |
| 393 | } |
| 394 | |
| 395 | static int mace_set_address(struct net_device *dev, void *addr) |
| 396 | { |
Wang Chen | 454d7c9 | 2008-11-12 23:37:49 -0800 | [diff] [blame] | 397 | struct mace_data *mp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | volatile struct mace __iomem *mb = mp->mace; |
| 399 | unsigned long flags; |
| 400 | |
| 401 | spin_lock_irqsave(&mp->lock, flags); |
| 402 | |
| 403 | __mace_set_address(dev, addr); |
| 404 | |
| 405 | /* note: setting ADDRCHG clears ENRCV */ |
| 406 | out_8(&mb->maccc, mp->maccc); |
| 407 | |
| 408 | spin_unlock_irqrestore(&mp->lock, flags); |
| 409 | return 0; |
| 410 | } |
| 411 | |
| 412 | static inline void mace_clean_rings(struct mace_data *mp) |
| 413 | { |
| 414 | int i; |
| 415 | |
| 416 | /* free some skb's */ |
| 417 | for (i = 0; i < N_RX_RING; ++i) { |
Al Viro | 79ea13c | 2008-01-24 02:06:46 -0800 | [diff] [blame] | 418 | if (mp->rx_bufs[i] != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | dev_kfree_skb(mp->rx_bufs[i]); |
| 420 | mp->rx_bufs[i] = NULL; |
| 421 | } |
| 422 | } |
| 423 | for (i = mp->tx_empty; i != mp->tx_fill; ) { |
| 424 | dev_kfree_skb(mp->tx_bufs[i]); |
| 425 | if (++i >= N_TX_RING) |
| 426 | i = 0; |
| 427 | } |
| 428 | } |
| 429 | |
| 430 | static int mace_open(struct net_device *dev) |
| 431 | { |
Wang Chen | 454d7c9 | 2008-11-12 23:37:49 -0800 | [diff] [blame] | 432 | struct mace_data *mp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | volatile struct mace __iomem *mb = mp->mace; |
| 434 | volatile struct dbdma_regs __iomem *rd = mp->rx_dma; |
| 435 | volatile struct dbdma_regs __iomem *td = mp->tx_dma; |
| 436 | volatile struct dbdma_cmd *cp; |
| 437 | int i; |
| 438 | struct sk_buff *skb; |
| 439 | unsigned char *data; |
| 440 | |
| 441 | /* reset the chip */ |
| 442 | mace_reset(dev); |
| 443 | |
| 444 | /* initialize list of sk_buffs for receiving and set up recv dma */ |
| 445 | mace_clean_rings(mp); |
| 446 | memset((char *)mp->rx_cmds, 0, N_RX_RING * sizeof(struct dbdma_cmd)); |
| 447 | cp = mp->rx_cmds; |
| 448 | for (i = 0; i < N_RX_RING - 1; ++i) { |
| 449 | skb = dev_alloc_skb(RX_BUFLEN + 2); |
Al Viro | 79ea13c | 2008-01-24 02:06:46 -0800 | [diff] [blame] | 450 | if (!skb) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | data = dummy_buf; |
| 452 | } else { |
| 453 | skb_reserve(skb, 2); /* so IP header lands on 4-byte bdry */ |
| 454 | data = skb->data; |
| 455 | } |
| 456 | mp->rx_bufs[i] = skb; |
| 457 | st_le16(&cp->req_count, RX_BUFLEN); |
| 458 | st_le16(&cp->command, INPUT_LAST + INTR_ALWAYS); |
| 459 | st_le32(&cp->phy_addr, virt_to_bus(data)); |
| 460 | cp->xfer_status = 0; |
| 461 | ++cp; |
| 462 | } |
| 463 | mp->rx_bufs[i] = NULL; |
| 464 | st_le16(&cp->command, DBDMA_STOP); |
| 465 | mp->rx_fill = i; |
| 466 | mp->rx_empty = 0; |
| 467 | |
| 468 | /* Put a branch back to the beginning of the receive command list */ |
| 469 | ++cp; |
| 470 | st_le16(&cp->command, DBDMA_NOP + BR_ALWAYS); |
| 471 | st_le32(&cp->cmd_dep, virt_to_bus(mp->rx_cmds)); |
| 472 | |
| 473 | /* start rx dma */ |
| 474 | out_le32(&rd->control, (RUN|PAUSE|FLUSH|WAKE) << 16); /* clear run bit */ |
| 475 | out_le32(&rd->cmdptr, virt_to_bus(mp->rx_cmds)); |
| 476 | out_le32(&rd->control, (RUN << 16) | RUN); |
| 477 | |
| 478 | /* put a branch at the end of the tx command list */ |
| 479 | cp = mp->tx_cmds + NCMDS_TX * N_TX_RING; |
| 480 | st_le16(&cp->command, DBDMA_NOP + BR_ALWAYS); |
| 481 | st_le32(&cp->cmd_dep, virt_to_bus(mp->tx_cmds)); |
| 482 | |
| 483 | /* reset tx dma */ |
| 484 | out_le32(&td->control, (RUN|PAUSE|FLUSH|WAKE) << 16); |
| 485 | out_le32(&td->cmdptr, virt_to_bus(mp->tx_cmds)); |
| 486 | mp->tx_fill = 0; |
| 487 | mp->tx_empty = 0; |
| 488 | mp->tx_fullup = 0; |
| 489 | mp->tx_active = 0; |
| 490 | mp->tx_bad_runt = 0; |
| 491 | |
| 492 | /* turn it on! */ |
| 493 | out_8(&mb->maccc, mp->maccc); |
| 494 | /* enable all interrupts except receive interrupts */ |
| 495 | out_8(&mb->imr, RCVINT); |
| 496 | |
| 497 | return 0; |
| 498 | } |
| 499 | |
| 500 | static int mace_close(struct net_device *dev) |
| 501 | { |
Wang Chen | 454d7c9 | 2008-11-12 23:37:49 -0800 | [diff] [blame] | 502 | struct mace_data *mp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | volatile struct mace __iomem *mb = mp->mace; |
| 504 | volatile struct dbdma_regs __iomem *rd = mp->rx_dma; |
| 505 | volatile struct dbdma_regs __iomem *td = mp->tx_dma; |
| 506 | |
| 507 | /* disable rx and tx */ |
| 508 | out_8(&mb->maccc, 0); |
| 509 | out_8(&mb->imr, 0xff); /* disable all intrs */ |
| 510 | |
| 511 | /* disable rx and tx dma */ |
| 512 | st_le32(&rd->control, (RUN|PAUSE|FLUSH|WAKE) << 16); /* clear run bit */ |
| 513 | st_le32(&td->control, (RUN|PAUSE|FLUSH|WAKE) << 16); /* clear run bit */ |
| 514 | |
| 515 | mace_clean_rings(mp); |
| 516 | |
| 517 | return 0; |
| 518 | } |
| 519 | |
| 520 | static inline void mace_set_timeout(struct net_device *dev) |
| 521 | { |
Wang Chen | 454d7c9 | 2008-11-12 23:37:49 -0800 | [diff] [blame] | 522 | struct mace_data *mp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | |
| 524 | if (mp->timeout_active) |
| 525 | del_timer(&mp->tx_timeout); |
| 526 | mp->tx_timeout.expires = jiffies + TX_TIMEOUT; |
| 527 | mp->tx_timeout.function = mace_tx_timeout; |
| 528 | mp->tx_timeout.data = (unsigned long) dev; |
| 529 | add_timer(&mp->tx_timeout); |
| 530 | mp->timeout_active = 1; |
| 531 | } |
| 532 | |
| 533 | static int mace_xmit_start(struct sk_buff *skb, struct net_device *dev) |
| 534 | { |
Wang Chen | 454d7c9 | 2008-11-12 23:37:49 -0800 | [diff] [blame] | 535 | struct mace_data *mp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | volatile struct dbdma_regs __iomem *td = mp->tx_dma; |
| 537 | volatile struct dbdma_cmd *cp, *np; |
| 538 | unsigned long flags; |
| 539 | int fill, next, len; |
| 540 | |
| 541 | /* see if there's a free slot in the tx ring */ |
| 542 | spin_lock_irqsave(&mp->lock, flags); |
| 543 | fill = mp->tx_fill; |
| 544 | next = fill + 1; |
| 545 | if (next >= N_TX_RING) |
| 546 | next = 0; |
| 547 | if (next == mp->tx_empty) { |
| 548 | netif_stop_queue(dev); |
| 549 | mp->tx_fullup = 1; |
| 550 | spin_unlock_irqrestore(&mp->lock, flags); |
Patrick McHardy | 5b54814 | 2009-06-12 06:22:29 +0000 | [diff] [blame] | 551 | return NETDEV_TX_BUSY; /* can't take it at the moment */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | } |
| 553 | spin_unlock_irqrestore(&mp->lock, flags); |
| 554 | |
| 555 | /* partially fill in the dma command block */ |
| 556 | len = skb->len; |
| 557 | if (len > ETH_FRAME_LEN) { |
| 558 | printk(KERN_DEBUG "mace: xmit frame too long (%d)\n", len); |
| 559 | len = ETH_FRAME_LEN; |
| 560 | } |
| 561 | mp->tx_bufs[fill] = skb; |
| 562 | cp = mp->tx_cmds + NCMDS_TX * fill; |
| 563 | st_le16(&cp->req_count, len); |
| 564 | st_le32(&cp->phy_addr, virt_to_bus(skb->data)); |
| 565 | |
| 566 | np = mp->tx_cmds + NCMDS_TX * next; |
| 567 | out_le16(&np->command, DBDMA_STOP); |
| 568 | |
| 569 | /* poke the tx dma channel */ |
| 570 | spin_lock_irqsave(&mp->lock, flags); |
| 571 | mp->tx_fill = next; |
| 572 | if (!mp->tx_bad_runt && mp->tx_active < MAX_TX_ACTIVE) { |
| 573 | out_le16(&cp->xfer_status, 0); |
| 574 | out_le16(&cp->command, OUTPUT_LAST); |
| 575 | out_le32(&td->control, ((RUN|WAKE) << 16) + (RUN|WAKE)); |
| 576 | ++mp->tx_active; |
| 577 | mace_set_timeout(dev); |
| 578 | } |
| 579 | if (++next >= N_TX_RING) |
| 580 | next = 0; |
| 581 | if (next == mp->tx_empty) |
| 582 | netif_stop_queue(dev); |
| 583 | spin_unlock_irqrestore(&mp->lock, flags); |
| 584 | |
Patrick McHardy | 6ed1065 | 2009-06-23 06:03:08 +0000 | [diff] [blame] | 585 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | } |
| 587 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | static void mace_set_multicast(struct net_device *dev) |
| 589 | { |
Wang Chen | 454d7c9 | 2008-11-12 23:37:49 -0800 | [diff] [blame] | 590 | struct mace_data *mp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | volatile struct mace __iomem *mb = mp->mace; |
Jiri Pirko | f9dcbcc | 2010-02-23 09:19:49 +0000 | [diff] [blame] | 592 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | u32 crc; |
| 594 | unsigned long flags; |
| 595 | |
| 596 | spin_lock_irqsave(&mp->lock, flags); |
| 597 | mp->maccc &= ~PROM; |
| 598 | if (dev->flags & IFF_PROMISC) { |
| 599 | mp->maccc |= PROM; |
| 600 | } else { |
| 601 | unsigned char multicast_filter[8]; |
Jiri Pirko | 22bedad | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 602 | struct netdev_hw_addr *ha; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | |
| 604 | if (dev->flags & IFF_ALLMULTI) { |
| 605 | for (i = 0; i < 8; i++) |
| 606 | multicast_filter[i] = 0xff; |
| 607 | } else { |
| 608 | for (i = 0; i < 8; i++) |
| 609 | multicast_filter[i] = 0; |
Jiri Pirko | 22bedad | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 610 | netdev_for_each_mc_addr(ha, dev) { |
| 611 | crc = ether_crc_le(6, ha->addr); |
Jiri Pirko | f9dcbcc | 2010-02-23 09:19:49 +0000 | [diff] [blame] | 612 | i = crc >> 26; /* bit number in multicast_filter */ |
| 613 | multicast_filter[i >> 3] |= 1 << (i & 7); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | } |
| 615 | } |
| 616 | #if 0 |
| 617 | printk("Multicast filter :"); |
| 618 | for (i = 0; i < 8; i++) |
| 619 | printk("%02x ", multicast_filter[i]); |
| 620 | printk("\n"); |
| 621 | #endif |
| 622 | |
| 623 | if (mp->chipid == BROKEN_ADDRCHG_REV) |
| 624 | out_8(&mb->iac, LOGADDR); |
| 625 | else { |
| 626 | out_8(&mb->iac, ADDRCHG | LOGADDR); |
| 627 | while ((in_8(&mb->iac) & ADDRCHG) != 0) |
| 628 | ; |
| 629 | } |
| 630 | for (i = 0; i < 8; ++i) |
| 631 | out_8(&mb->ladrf, multicast_filter[i]); |
| 632 | if (mp->chipid != BROKEN_ADDRCHG_REV) |
| 633 | out_8(&mb->iac, 0); |
| 634 | } |
| 635 | /* reset maccc */ |
| 636 | out_8(&mb->maccc, mp->maccc); |
| 637 | spin_unlock_irqrestore(&mp->lock, flags); |
| 638 | } |
| 639 | |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 640 | static void mace_handle_misc_intrs(struct mace_data *mp, int intr, struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | { |
| 642 | volatile struct mace __iomem *mb = mp->mace; |
| 643 | static int mace_babbles, mace_jabbers; |
| 644 | |
| 645 | if (intr & MPCO) |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 646 | dev->stats.rx_missed_errors += 256; |
| 647 | dev->stats.rx_missed_errors += in_8(&mb->mpc); /* reading clears it */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | if (intr & RNTPCO) |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 649 | dev->stats.rx_length_errors += 256; |
| 650 | dev->stats.rx_length_errors += in_8(&mb->rntpc); /* reading clears it */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | if (intr & CERR) |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 652 | ++dev->stats.tx_heartbeat_errors; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | if (intr & BABBLE) |
| 654 | if (mace_babbles++ < 4) |
| 655 | printk(KERN_DEBUG "mace: babbling transmitter\n"); |
| 656 | if (intr & JABBER) |
| 657 | if (mace_jabbers++ < 4) |
| 658 | printk(KERN_DEBUG "mace: jabbering transceiver\n"); |
| 659 | } |
| 660 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 661 | static irqreturn_t mace_interrupt(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | { |
| 663 | struct net_device *dev = (struct net_device *) dev_id; |
Wang Chen | 454d7c9 | 2008-11-12 23:37:49 -0800 | [diff] [blame] | 664 | struct mace_data *mp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | volatile struct mace __iomem *mb = mp->mace; |
| 666 | volatile struct dbdma_regs __iomem *td = mp->tx_dma; |
| 667 | volatile struct dbdma_cmd *cp; |
| 668 | int intr, fs, i, stat, x; |
| 669 | int xcount, dstat; |
| 670 | unsigned long flags; |
| 671 | /* static int mace_last_fs, mace_last_xcount; */ |
| 672 | |
| 673 | spin_lock_irqsave(&mp->lock, flags); |
| 674 | intr = in_8(&mb->ir); /* read interrupt register */ |
| 675 | in_8(&mb->xmtrc); /* get retries */ |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 676 | mace_handle_misc_intrs(mp, intr, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | |
| 678 | i = mp->tx_empty; |
| 679 | while (in_8(&mb->pr) & XMTSV) { |
| 680 | del_timer(&mp->tx_timeout); |
| 681 | mp->timeout_active = 0; |
| 682 | /* |
| 683 | * Clear any interrupt indication associated with this status |
| 684 | * word. This appears to unlatch any error indication from |
| 685 | * the DMA controller. |
| 686 | */ |
| 687 | intr = in_8(&mb->ir); |
| 688 | if (intr != 0) |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 689 | mace_handle_misc_intrs(mp, intr, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | if (mp->tx_bad_runt) { |
| 691 | fs = in_8(&mb->xmtfs); |
| 692 | mp->tx_bad_runt = 0; |
| 693 | out_8(&mb->xmtfc, AUTO_PAD_XMIT); |
| 694 | continue; |
| 695 | } |
| 696 | dstat = ld_le32(&td->status); |
| 697 | /* stop DMA controller */ |
| 698 | out_le32(&td->control, RUN << 16); |
| 699 | /* |
| 700 | * xcount is the number of complete frames which have been |
| 701 | * written to the fifo but for which status has not been read. |
| 702 | */ |
| 703 | xcount = (in_8(&mb->fifofc) >> XMTFC_SH) & XMTFC_MASK; |
| 704 | if (xcount == 0 || (dstat & DEAD)) { |
| 705 | /* |
| 706 | * If a packet was aborted before the DMA controller has |
| 707 | * finished transferring it, it seems that there are 2 bytes |
| 708 | * which are stuck in some buffer somewhere. These will get |
| 709 | * transmitted as soon as we read the frame status (which |
| 710 | * reenables the transmit data transfer request). Turning |
| 711 | * off the DMA controller and/or resetting the MACE doesn't |
| 712 | * help. So we disable auto-padding and FCS transmission |
| 713 | * so the two bytes will only be a runt packet which should |
| 714 | * be ignored by other stations. |
| 715 | */ |
| 716 | out_8(&mb->xmtfc, DXMTFCS); |
| 717 | } |
| 718 | fs = in_8(&mb->xmtfs); |
| 719 | if ((fs & XMTSV) == 0) { |
| 720 | printk(KERN_ERR "mace: xmtfs not valid! (fs=%x xc=%d ds=%x)\n", |
| 721 | fs, xcount, dstat); |
| 722 | mace_reset(dev); |
| 723 | /* |
| 724 | * XXX mace likes to hang the machine after a xmtfs error. |
| 725 | * This is hard to reproduce, reseting *may* help |
| 726 | */ |
| 727 | } |
| 728 | cp = mp->tx_cmds + NCMDS_TX * i; |
| 729 | stat = ld_le16(&cp->xfer_status); |
| 730 | if ((fs & (UFLO|LCOL|LCAR|RTRY)) || (dstat & DEAD) || xcount == 0) { |
| 731 | /* |
| 732 | * Check whether there were in fact 2 bytes written to |
| 733 | * the transmit FIFO. |
| 734 | */ |
| 735 | udelay(1); |
| 736 | x = (in_8(&mb->fifofc) >> XMTFC_SH) & XMTFC_MASK; |
| 737 | if (x != 0) { |
| 738 | /* there were two bytes with an end-of-packet indication */ |
| 739 | mp->tx_bad_runt = 1; |
| 740 | mace_set_timeout(dev); |
| 741 | } else { |
| 742 | /* |
| 743 | * Either there weren't the two bytes buffered up, or they |
| 744 | * didn't have an end-of-packet indication. |
| 745 | * We flush the transmit FIFO just in case (by setting the |
| 746 | * XMTFWU bit with the transmitter disabled). |
| 747 | */ |
| 748 | out_8(&mb->maccc, in_8(&mb->maccc) & ~ENXMT); |
| 749 | out_8(&mb->fifocc, in_8(&mb->fifocc) | XMTFWU); |
| 750 | udelay(1); |
| 751 | out_8(&mb->maccc, in_8(&mb->maccc) | ENXMT); |
| 752 | out_8(&mb->xmtfc, AUTO_PAD_XMIT); |
| 753 | } |
| 754 | } |
| 755 | /* dma should have finished */ |
| 756 | if (i == mp->tx_fill) { |
| 757 | printk(KERN_DEBUG "mace: tx ring ran out? (fs=%x xc=%d ds=%x)\n", |
| 758 | fs, xcount, dstat); |
| 759 | continue; |
| 760 | } |
| 761 | /* Update stats */ |
| 762 | if (fs & (UFLO|LCOL|LCAR|RTRY)) { |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 763 | ++dev->stats.tx_errors; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | if (fs & LCAR) |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 765 | ++dev->stats.tx_carrier_errors; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | if (fs & (UFLO|LCOL|RTRY)) |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 767 | ++dev->stats.tx_aborted_errors; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | } else { |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 769 | dev->stats.tx_bytes += mp->tx_bufs[i]->len; |
| 770 | ++dev->stats.tx_packets; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | } |
| 772 | dev_kfree_skb_irq(mp->tx_bufs[i]); |
| 773 | --mp->tx_active; |
| 774 | if (++i >= N_TX_RING) |
| 775 | i = 0; |
| 776 | #if 0 |
| 777 | mace_last_fs = fs; |
| 778 | mace_last_xcount = xcount; |
| 779 | #endif |
| 780 | } |
| 781 | |
| 782 | if (i != mp->tx_empty) { |
| 783 | mp->tx_fullup = 0; |
| 784 | netif_wake_queue(dev); |
| 785 | } |
| 786 | mp->tx_empty = i; |
| 787 | i += mp->tx_active; |
| 788 | if (i >= N_TX_RING) |
| 789 | i -= N_TX_RING; |
| 790 | if (!mp->tx_bad_runt && i != mp->tx_fill && mp->tx_active < MAX_TX_ACTIVE) { |
| 791 | do { |
| 792 | /* set up the next one */ |
| 793 | cp = mp->tx_cmds + NCMDS_TX * i; |
| 794 | out_le16(&cp->xfer_status, 0); |
| 795 | out_le16(&cp->command, OUTPUT_LAST); |
| 796 | ++mp->tx_active; |
| 797 | if (++i >= N_TX_RING) |
| 798 | i = 0; |
| 799 | } while (i != mp->tx_fill && mp->tx_active < MAX_TX_ACTIVE); |
| 800 | out_le32(&td->control, ((RUN|WAKE) << 16) + (RUN|WAKE)); |
| 801 | mace_set_timeout(dev); |
| 802 | } |
| 803 | spin_unlock_irqrestore(&mp->lock, flags); |
| 804 | return IRQ_HANDLED; |
| 805 | } |
| 806 | |
| 807 | static void mace_tx_timeout(unsigned long data) |
| 808 | { |
| 809 | struct net_device *dev = (struct net_device *) data; |
Wang Chen | 454d7c9 | 2008-11-12 23:37:49 -0800 | [diff] [blame] | 810 | struct mace_data *mp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | volatile struct mace __iomem *mb = mp->mace; |
| 812 | volatile struct dbdma_regs __iomem *td = mp->tx_dma; |
| 813 | volatile struct dbdma_regs __iomem *rd = mp->rx_dma; |
| 814 | volatile struct dbdma_cmd *cp; |
| 815 | unsigned long flags; |
| 816 | int i; |
| 817 | |
| 818 | spin_lock_irqsave(&mp->lock, flags); |
| 819 | mp->timeout_active = 0; |
| 820 | if (mp->tx_active == 0 && !mp->tx_bad_runt) |
| 821 | goto out; |
| 822 | |
| 823 | /* update various counters */ |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 824 | mace_handle_misc_intrs(mp, in_8(&mb->ir), dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | |
| 826 | cp = mp->tx_cmds + NCMDS_TX * mp->tx_empty; |
| 827 | |
| 828 | /* turn off both tx and rx and reset the chip */ |
| 829 | out_8(&mb->maccc, 0); |
| 830 | printk(KERN_ERR "mace: transmit timeout - resetting\n"); |
| 831 | dbdma_reset(td); |
| 832 | mace_reset(dev); |
| 833 | |
| 834 | /* restart rx dma */ |
| 835 | cp = bus_to_virt(ld_le32(&rd->cmdptr)); |
| 836 | dbdma_reset(rd); |
| 837 | out_le16(&cp->xfer_status, 0); |
| 838 | out_le32(&rd->cmdptr, virt_to_bus(cp)); |
| 839 | out_le32(&rd->control, (RUN << 16) | RUN); |
| 840 | |
| 841 | /* fix up the transmit side */ |
| 842 | i = mp->tx_empty; |
| 843 | mp->tx_active = 0; |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 844 | ++dev->stats.tx_errors; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 845 | if (mp->tx_bad_runt) { |
| 846 | mp->tx_bad_runt = 0; |
| 847 | } else if (i != mp->tx_fill) { |
| 848 | dev_kfree_skb(mp->tx_bufs[i]); |
| 849 | if (++i >= N_TX_RING) |
| 850 | i = 0; |
| 851 | mp->tx_empty = i; |
| 852 | } |
| 853 | mp->tx_fullup = 0; |
| 854 | netif_wake_queue(dev); |
| 855 | if (i != mp->tx_fill) { |
| 856 | cp = mp->tx_cmds + NCMDS_TX * i; |
| 857 | out_le16(&cp->xfer_status, 0); |
| 858 | out_le16(&cp->command, OUTPUT_LAST); |
| 859 | out_le32(&td->cmdptr, virt_to_bus(cp)); |
| 860 | out_le32(&td->control, (RUN << 16) | RUN); |
| 861 | ++mp->tx_active; |
| 862 | mace_set_timeout(dev); |
| 863 | } |
| 864 | |
| 865 | /* turn it back on */ |
| 866 | out_8(&mb->imr, RCVINT); |
| 867 | out_8(&mb->maccc, mp->maccc); |
| 868 | |
| 869 | out: |
| 870 | spin_unlock_irqrestore(&mp->lock, flags); |
| 871 | } |
| 872 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 873 | static irqreturn_t mace_txdma_intr(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | { |
| 875 | return IRQ_HANDLED; |
| 876 | } |
| 877 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 878 | static irqreturn_t mace_rxdma_intr(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | { |
| 880 | struct net_device *dev = (struct net_device *) dev_id; |
Wang Chen | 454d7c9 | 2008-11-12 23:37:49 -0800 | [diff] [blame] | 881 | struct mace_data *mp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 882 | volatile struct dbdma_regs __iomem *rd = mp->rx_dma; |
| 883 | volatile struct dbdma_cmd *cp, *np; |
| 884 | int i, nb, stat, next; |
| 885 | struct sk_buff *skb; |
| 886 | unsigned frame_status; |
| 887 | static int mace_lost_status; |
| 888 | unsigned char *data; |
| 889 | unsigned long flags; |
| 890 | |
| 891 | spin_lock_irqsave(&mp->lock, flags); |
| 892 | for (i = mp->rx_empty; i != mp->rx_fill; ) { |
| 893 | cp = mp->rx_cmds + i; |
| 894 | stat = ld_le16(&cp->xfer_status); |
| 895 | if ((stat & ACTIVE) == 0) { |
| 896 | next = i + 1; |
| 897 | if (next >= N_RX_RING) |
| 898 | next = 0; |
| 899 | np = mp->rx_cmds + next; |
Joe Perches | 8e95a20 | 2009-12-03 07:58:21 +0000 | [diff] [blame] | 900 | if (next != mp->rx_fill && |
| 901 | (ld_le16(&np->xfer_status) & ACTIVE) != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 902 | printk(KERN_DEBUG "mace: lost a status word\n"); |
| 903 | ++mace_lost_status; |
| 904 | } else |
| 905 | break; |
| 906 | } |
| 907 | nb = ld_le16(&cp->req_count) - ld_le16(&cp->res_count); |
| 908 | out_le16(&cp->command, DBDMA_STOP); |
| 909 | /* got a packet, have a look at it */ |
| 910 | skb = mp->rx_bufs[i]; |
Al Viro | 79ea13c | 2008-01-24 02:06:46 -0800 | [diff] [blame] | 911 | if (!skb) { |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 912 | ++dev->stats.rx_dropped; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | } else if (nb > 8) { |
| 914 | data = skb->data; |
| 915 | frame_status = (data[nb-3] << 8) + data[nb-4]; |
| 916 | if (frame_status & (RS_OFLO|RS_CLSN|RS_FRAMERR|RS_FCSERR)) { |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 917 | ++dev->stats.rx_errors; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | if (frame_status & RS_OFLO) |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 919 | ++dev->stats.rx_over_errors; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | if (frame_status & RS_FRAMERR) |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 921 | ++dev->stats.rx_frame_errors; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 922 | if (frame_status & RS_FCSERR) |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 923 | ++dev->stats.rx_crc_errors; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 924 | } else { |
| 925 | /* Mace feature AUTO_STRIP_RCV is on by default, dropping the |
| 926 | * FCS on frames with 802.3 headers. This means that Ethernet |
| 927 | * frames have 8 extra octets at the end, while 802.3 frames |
| 928 | * have only 4. We need to correctly account for this. */ |
| 929 | if (*(unsigned short *)(data+12) < 1536) /* 802.3 header */ |
| 930 | nb -= 4; |
| 931 | else /* Ethernet header; mace includes FCS */ |
| 932 | nb -= 8; |
| 933 | skb_put(skb, nb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | skb->protocol = eth_type_trans(skb, dev); |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 935 | dev->stats.rx_bytes += skb->len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | netif_rx(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | mp->rx_bufs[i] = NULL; |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 938 | ++dev->stats.rx_packets; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | } |
| 940 | } else { |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 941 | ++dev->stats.rx_errors; |
| 942 | ++dev->stats.rx_length_errors; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | } |
| 944 | |
| 945 | /* advance to next */ |
| 946 | if (++i >= N_RX_RING) |
| 947 | i = 0; |
| 948 | } |
| 949 | mp->rx_empty = i; |
| 950 | |
| 951 | i = mp->rx_fill; |
| 952 | for (;;) { |
| 953 | next = i + 1; |
| 954 | if (next >= N_RX_RING) |
| 955 | next = 0; |
| 956 | if (next == mp->rx_empty) |
| 957 | break; |
| 958 | cp = mp->rx_cmds + i; |
| 959 | skb = mp->rx_bufs[i]; |
Al Viro | 79ea13c | 2008-01-24 02:06:46 -0800 | [diff] [blame] | 960 | if (!skb) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | skb = dev_alloc_skb(RX_BUFLEN + 2); |
Al Viro | 79ea13c | 2008-01-24 02:06:46 -0800 | [diff] [blame] | 962 | if (skb) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | skb_reserve(skb, 2); |
| 964 | mp->rx_bufs[i] = skb; |
| 965 | } |
| 966 | } |
| 967 | st_le16(&cp->req_count, RX_BUFLEN); |
| 968 | data = skb? skb->data: dummy_buf; |
| 969 | st_le32(&cp->phy_addr, virt_to_bus(data)); |
| 970 | out_le16(&cp->xfer_status, 0); |
| 971 | out_le16(&cp->command, INPUT_LAST + INTR_ALWAYS); |
| 972 | #if 0 |
| 973 | if ((ld_le32(&rd->status) & ACTIVE) != 0) { |
| 974 | out_le32(&rd->control, (PAUSE << 16) | PAUSE); |
| 975 | while ((in_le32(&rd->status) & ACTIVE) != 0) |
| 976 | ; |
| 977 | } |
| 978 | #endif |
| 979 | i = next; |
| 980 | } |
| 981 | if (i != mp->rx_fill) { |
| 982 | out_le32(&rd->control, ((RUN|WAKE) << 16) | (RUN|WAKE)); |
| 983 | mp->rx_fill = i; |
| 984 | } |
| 985 | spin_unlock_irqrestore(&mp->lock, flags); |
| 986 | return IRQ_HANDLED; |
| 987 | } |
| 988 | |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 989 | static struct of_device_id mace_match[] = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 990 | { |
| 991 | { |
| 992 | .name = "mace", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | }, |
| 994 | {}, |
| 995 | }; |
Olaf Hering | 8c9795b | 2005-10-28 17:46:21 -0700 | [diff] [blame] | 996 | MODULE_DEVICE_TABLE (of, mace_match); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 998 | static struct macio_driver mace_driver = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | { |
| 1000 | .name = "mace", |
| 1001 | .match_table = mace_match, |
| 1002 | .probe = mace_probe, |
| 1003 | .remove = mace_remove, |
| 1004 | }; |
| 1005 | |
| 1006 | |
| 1007 | static int __init mace_init(void) |
| 1008 | { |
| 1009 | return macio_register_driver(&mace_driver); |
| 1010 | } |
| 1011 | |
| 1012 | static void __exit mace_cleanup(void) |
| 1013 | { |
| 1014 | macio_unregister_driver(&mace_driver); |
| 1015 | |
Jesper Juhl | b4558ea | 2005-10-28 16:53:13 -0400 | [diff] [blame] | 1016 | kfree(dummy_buf); |
| 1017 | dummy_buf = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1018 | } |
| 1019 | |
| 1020 | MODULE_AUTHOR("Paul Mackerras"); |
| 1021 | MODULE_DESCRIPTION("PowerMac MACE driver."); |
Rusty Russell | 8d3b33f | 2006-03-25 03:07:05 -0800 | [diff] [blame] | 1022 | module_param(port_aaui, int, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | MODULE_PARM_DESC(port_aaui, "MACE uses AAUI port (0-1)"); |
| 1024 | MODULE_LICENSE("GPL"); |
| 1025 | |
| 1026 | module_init(mace_init); |
| 1027 | module_exit(mace_cleanup); |