Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 1 | /* |
| 2 | * 7990.c -- LANCE ethernet IC generic routines. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * This is an attempt to separate out the bits of various ethernet |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 4 | * drivers that are common because they all use the AMD 7990 LANCE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * (Local Area Network Controller for Ethernet) chip. |
| 6 | * |
| 7 | * Copyright (C) 05/1998 Peter Maydell <pmaydell@chiark.greenend.org.uk> |
| 8 | * |
| 9 | * Most of this stuff was obtained by looking at other LANCE drivers, |
| 10 | * in particular a2065.[ch]. The AMD C-LANCE datasheet was also helpful. |
| 11 | * NB: this was made easy by the fact that Jes Sorensen had cleaned up |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 12 | * most of a2025 and sunlance with the aim of merging them, so the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | * common code was pretty obvious. |
| 14 | */ |
| 15 | #include <linux/crc32.h> |
| 16 | #include <linux/delay.h> |
| 17 | #include <linux/errno.h> |
| 18 | #include <linux/netdevice.h> |
| 19 | #include <linux/etherdevice.h> |
| 20 | #include <linux/init.h> |
| 21 | #include <linux/module.h> |
| 22 | #include <linux/kernel.h> |
| 23 | #include <linux/types.h> |
| 24 | #include <linux/fcntl.h> |
| 25 | #include <linux/interrupt.h> |
| 26 | #include <linux/ioport.h> |
| 27 | #include <linux/in.h> |
| 28 | #include <linux/route.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <linux/string.h> |
| 30 | #include <linux/skbuff.h> |
Al Viro | 3c13958 | 2005-12-01 06:44:55 -0500 | [diff] [blame] | 31 | #include <asm/irq.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | /* Used for the temporal inet entries and routing */ |
| 33 | #include <linux/socket.h> |
| 34 | #include <linux/bitops.h> |
| 35 | |
| 36 | #include <asm/system.h> |
| 37 | #include <asm/io.h> |
| 38 | #include <asm/dma.h> |
| 39 | #include <asm/pgtable.h> |
| 40 | #ifdef CONFIG_HP300 |
| 41 | #include <asm/blinken.h> |
| 42 | #endif |
| 43 | |
| 44 | #include "7990.h" |
| 45 | |
| 46 | #define WRITERAP(lp,x) out_be16(lp->base + LANCE_RAP, (x)) |
| 47 | #define WRITERDP(lp,x) out_be16(lp->base + LANCE_RDP, (x)) |
| 48 | #define READRDP(lp) in_be16(lp->base + LANCE_RDP) |
| 49 | |
| 50 | #if defined(CONFIG_HPLANCE) || defined(CONFIG_HPLANCE_MODULE) |
| 51 | #include "hplance.h" |
| 52 | |
| 53 | #undef WRITERAP |
| 54 | #undef WRITERDP |
| 55 | #undef READRDP |
| 56 | |
| 57 | #if defined(CONFIG_MVME147_NET) || defined(CONFIG_MVME147_NET_MODULE) |
| 58 | |
| 59 | /* Lossage Factor Nine, Mr Sulu. */ |
| 60 | #define WRITERAP(lp,x) (lp->writerap(lp,x)) |
| 61 | #define WRITERDP(lp,x) (lp->writerdp(lp,x)) |
| 62 | #define READRDP(lp) (lp->readrdp(lp)) |
| 63 | |
| 64 | #else |
| 65 | |
| 66 | /* These inlines can be used if only CONFIG_HPLANCE is defined */ |
| 67 | static inline void WRITERAP(struct lance_private *lp, __u16 value) |
| 68 | { |
| 69 | do { |
| 70 | out_be16(lp->base + HPLANCE_REGOFF + LANCE_RAP, value); |
| 71 | } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0); |
| 72 | } |
| 73 | |
| 74 | static inline void WRITERDP(struct lance_private *lp, __u16 value) |
| 75 | { |
| 76 | do { |
| 77 | out_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP, value); |
| 78 | } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0); |
| 79 | } |
| 80 | |
| 81 | static inline __u16 READRDP(struct lance_private *lp) |
| 82 | { |
| 83 | __u16 value; |
| 84 | do { |
| 85 | value = in_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP); |
| 86 | } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0); |
| 87 | return value; |
| 88 | } |
| 89 | |
| 90 | #endif |
| 91 | #endif /* CONFIG_HPLANCE || CONFIG_HPLANCE_MODULE */ |
| 92 | |
| 93 | /* debugging output macros, various flavours */ |
| 94 | /* #define TEST_HITS */ |
| 95 | #ifdef UNDEF |
| 96 | #define PRINT_RINGS() \ |
| 97 | do { \ |
| 98 | int t; \ |
| 99 | for (t=0; t < RX_RING_SIZE; t++) { \ |
| 100 | printk("R%d: @(%02X %04X) len %04X, mblen %04X, bits %02X\n",\ |
| 101 | t, ib->brx_ring[t].rmd1_hadr, ib->brx_ring[t].rmd0,\ |
| 102 | ib->brx_ring[t].length,\ |
| 103 | ib->brx_ring[t].mblength, ib->brx_ring[t].rmd1_bits);\ |
| 104 | }\ |
| 105 | for (t=0; t < TX_RING_SIZE; t++) { \ |
| 106 | printk("T%d: @(%02X %04X) len %04X, misc %04X, bits %02X\n",\ |
| 107 | t, ib->btx_ring[t].tmd1_hadr, ib->btx_ring[t].tmd0,\ |
| 108 | ib->btx_ring[t].length,\ |
| 109 | ib->btx_ring[t].misc, ib->btx_ring[t].tmd1_bits);\ |
| 110 | }\ |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 111 | } while (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | #else |
| 113 | #define PRINT_RINGS() |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 114 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | |
| 116 | /* Load the CSR registers. The LANCE has to be STOPped when we do this! */ |
| 117 | static void load_csrs (struct lance_private *lp) |
| 118 | { |
| 119 | volatile struct lance_init_block *aib = lp->lance_init_block; |
| 120 | int leptr; |
| 121 | |
| 122 | leptr = LANCE_ADDR (aib); |
| 123 | |
| 124 | WRITERAP(lp, LE_CSR1); /* load address of init block */ |
| 125 | WRITERDP(lp, leptr & 0xFFFF); |
| 126 | WRITERAP(lp, LE_CSR2); |
| 127 | WRITERDP(lp, leptr >> 16); |
| 128 | WRITERAP(lp, LE_CSR3); |
| 129 | WRITERDP(lp, lp->busmaster_regval); /* set byteswap/ALEctrl/byte ctrl */ |
| 130 | |
| 131 | /* Point back to csr0 */ |
| 132 | WRITERAP(lp, LE_CSR0); |
| 133 | } |
| 134 | |
| 135 | /* #define to 0 or 1 appropriately */ |
| 136 | #define DEBUG_IRING 0 |
| 137 | /* Set up the Lance Rx and Tx rings and the init block */ |
| 138 | static void lance_init_ring (struct net_device *dev) |
| 139 | { |
| 140 | struct lance_private *lp = netdev_priv(dev); |
| 141 | volatile struct lance_init_block *ib = lp->init_block; |
| 142 | volatile struct lance_init_block *aib; /* for LANCE_ADDR computations */ |
| 143 | int leptr; |
| 144 | int i; |
| 145 | |
| 146 | aib = lp->lance_init_block; |
| 147 | |
| 148 | lp->rx_new = lp->tx_new = 0; |
| 149 | lp->rx_old = lp->tx_old = 0; |
| 150 | |
| 151 | ib->mode = LE_MO_PROM; /* normal, enable Tx & Rx */ |
| 152 | |
| 153 | /* Copy the ethernet address to the lance init block |
| 154 | * Notice that we do a byteswap if we're big endian. |
| 155 | * [I think this is the right criterion; at least, sunlance, |
| 156 | * a2065 and atarilance do the byteswap and lance.c (PC) doesn't. |
| 157 | * However, the datasheet says that the BSWAP bit doesn't affect |
| 158 | * the init block, so surely it should be low byte first for |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 159 | * everybody? Um.] |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | * We could define the ib->physaddr as three 16bit values and |
| 161 | * use (addr[1] << 8) | addr[0] & co, but this is more efficient. |
| 162 | */ |
| 163 | #ifdef __BIG_ENDIAN |
| 164 | ib->phys_addr [0] = dev->dev_addr [1]; |
| 165 | ib->phys_addr [1] = dev->dev_addr [0]; |
| 166 | ib->phys_addr [2] = dev->dev_addr [3]; |
| 167 | ib->phys_addr [3] = dev->dev_addr [2]; |
| 168 | ib->phys_addr [4] = dev->dev_addr [5]; |
| 169 | ib->phys_addr [5] = dev->dev_addr [4]; |
| 170 | #else |
| 171 | for (i=0; i<6; i++) |
| 172 | ib->phys_addr[i] = dev->dev_addr[i]; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 173 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | |
| 175 | if (DEBUG_IRING) |
| 176 | printk ("TX rings:\n"); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 177 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | lp->tx_full = 0; |
| 179 | /* Setup the Tx ring entries */ |
| 180 | for (i = 0; i < (1<<lp->lance_log_tx_bufs); i++) { |
| 181 | leptr = LANCE_ADDR(&aib->tx_buf[i][0]); |
| 182 | ib->btx_ring [i].tmd0 = leptr; |
| 183 | ib->btx_ring [i].tmd1_hadr = leptr >> 16; |
| 184 | ib->btx_ring [i].tmd1_bits = 0; |
| 185 | ib->btx_ring [i].length = 0xf000; /* The ones required by tmd2 */ |
| 186 | ib->btx_ring [i].misc = 0; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 187 | if (DEBUG_IRING) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | printk ("%d: 0x%8.8x\n", i, leptr); |
| 189 | } |
| 190 | |
| 191 | /* Setup the Rx ring entries */ |
| 192 | if (DEBUG_IRING) |
| 193 | printk ("RX rings:\n"); |
| 194 | for (i = 0; i < (1<<lp->lance_log_rx_bufs); i++) { |
| 195 | leptr = LANCE_ADDR(&aib->rx_buf[i][0]); |
| 196 | |
| 197 | ib->brx_ring [i].rmd0 = leptr; |
| 198 | ib->brx_ring [i].rmd1_hadr = leptr >> 16; |
| 199 | ib->brx_ring [i].rmd1_bits = LE_R1_OWN; |
| 200 | /* 0xf000 == bits that must be one (reserved, presumably) */ |
| 201 | ib->brx_ring [i].length = -RX_BUFF_SIZE | 0xf000; |
| 202 | ib->brx_ring [i].mblength = 0; |
| 203 | if (DEBUG_IRING) |
| 204 | printk ("%d: 0x%8.8x\n", i, leptr); |
| 205 | } |
| 206 | |
| 207 | /* Setup the initialization block */ |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 208 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | /* Setup rx descriptor pointer */ |
| 210 | leptr = LANCE_ADDR(&aib->brx_ring); |
| 211 | ib->rx_len = (lp->lance_log_rx_bufs << 13) | (leptr >> 16); |
| 212 | ib->rx_ptr = leptr; |
| 213 | if (DEBUG_IRING) |
| 214 | printk ("RX ptr: %8.8x\n", leptr); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 215 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | /* Setup tx descriptor pointer */ |
| 217 | leptr = LANCE_ADDR(&aib->btx_ring); |
| 218 | ib->tx_len = (lp->lance_log_tx_bufs << 13) | (leptr >> 16); |
| 219 | ib->tx_ptr = leptr; |
| 220 | if (DEBUG_IRING) |
| 221 | printk ("TX ptr: %8.8x\n", leptr); |
| 222 | |
| 223 | /* Clear the multicast filter */ |
| 224 | ib->filter [0] = 0; |
| 225 | ib->filter [1] = 0; |
| 226 | PRINT_RINGS(); |
| 227 | } |
| 228 | |
| 229 | /* LANCE must be STOPped before we do this, too... */ |
| 230 | static int init_restart_lance (struct lance_private *lp) |
| 231 | { |
| 232 | int i; |
| 233 | |
| 234 | WRITERAP(lp, LE_CSR0); |
| 235 | WRITERDP(lp, LE_C0_INIT); |
| 236 | |
| 237 | /* Need a hook here for sunlance ledma stuff */ |
| 238 | |
| 239 | /* Wait for the lance to complete initialization */ |
| 240 | for (i = 0; (i < 100) && !(READRDP(lp) & (LE_C0_ERR | LE_C0_IDON)); i++) |
| 241 | barrier(); |
| 242 | if ((i == 100) || (READRDP(lp) & LE_C0_ERR)) { |
| 243 | printk ("LANCE unopened after %d ticks, csr0=%4.4x.\n", i, READRDP(lp)); |
| 244 | return -1; |
| 245 | } |
| 246 | |
| 247 | /* Clear IDON by writing a "1", enable interrupts and start lance */ |
| 248 | WRITERDP(lp, LE_C0_IDON); |
| 249 | WRITERDP(lp, LE_C0_INEA | LE_C0_STRT); |
| 250 | |
| 251 | return 0; |
| 252 | } |
| 253 | |
| 254 | static int lance_reset (struct net_device *dev) |
| 255 | { |
| 256 | struct lance_private *lp = netdev_priv(dev); |
| 257 | int status; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 258 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | /* Stop the lance */ |
| 260 | WRITERAP(lp, LE_CSR0); |
| 261 | WRITERDP(lp, LE_C0_STOP); |
| 262 | |
| 263 | load_csrs (lp); |
| 264 | lance_init_ring (dev); |
| 265 | dev->trans_start = jiffies; |
| 266 | status = init_restart_lance (lp); |
| 267 | #ifdef DEBUG_DRIVER |
| 268 | printk ("Lance restart=%d\n", status); |
| 269 | #endif |
| 270 | return status; |
| 271 | } |
| 272 | |
| 273 | static int lance_rx (struct net_device *dev) |
| 274 | { |
| 275 | struct lance_private *lp = netdev_priv(dev); |
| 276 | volatile struct lance_init_block *ib = lp->init_block; |
| 277 | volatile struct lance_rx_desc *rd; |
| 278 | unsigned char bits; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | #ifdef TEST_HITS |
| 280 | int i; |
| 281 | #endif |
| 282 | |
| 283 | #ifdef TEST_HITS |
| 284 | printk ("["); |
| 285 | for (i = 0; i < RX_RING_SIZE; i++) { |
| 286 | if (i == lp->rx_new) |
| 287 | printk ("%s", |
| 288 | ib->brx_ring [i].rmd1_bits & LE_R1_OWN ? "_" : "X"); |
| 289 | else |
| 290 | printk ("%s", |
| 291 | ib->brx_ring [i].rmd1_bits & LE_R1_OWN ? "." : "1"); |
| 292 | } |
| 293 | printk ("]"); |
| 294 | #endif |
| 295 | #ifdef CONFIG_HP300 |
| 296 | blinken_leds(0x40, 0); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 297 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | WRITERDP(lp, LE_C0_RINT | LE_C0_INEA); /* ack Rx int, reenable ints */ |
| 299 | for (rd = &ib->brx_ring [lp->rx_new]; /* For each Rx ring we own... */ |
| 300 | !((bits = rd->rmd1_bits) & LE_R1_OWN); |
| 301 | rd = &ib->brx_ring [lp->rx_new]) { |
| 302 | |
| 303 | /* We got an incomplete frame? */ |
| 304 | if ((bits & LE_R1_POK) != LE_R1_POK) { |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 305 | dev->stats.rx_over_errors++; |
| 306 | dev->stats.rx_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | continue; |
| 308 | } else if (bits & LE_R1_ERR) { |
| 309 | /* Count only the end frame as a rx error, |
| 310 | * not the beginning |
| 311 | */ |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 312 | if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++; |
| 313 | if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++; |
| 314 | if (bits & LE_R1_OFL) dev->stats.rx_over_errors++; |
| 315 | if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++; |
| 316 | if (bits & LE_R1_EOP) dev->stats.rx_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | } else { |
Al Viro | 79ea13c | 2008-01-24 02:06:46 -0800 | [diff] [blame] | 318 | int len = (rd->mblength & 0xfff) - 4; |
| 319 | struct sk_buff *skb = dev_alloc_skb (len+2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | |
Al Viro | 79ea13c | 2008-01-24 02:06:46 -0800 | [diff] [blame] | 321 | if (!skb) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | printk ("%s: Memory squeeze, deferring packet.\n", |
| 323 | dev->name); |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 324 | dev->stats.rx_dropped++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | rd->mblength = 0; |
| 326 | rd->rmd1_bits = LE_R1_OWN; |
| 327 | lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask; |
| 328 | return 0; |
| 329 | } |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 330 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | skb_reserve (skb, 2); /* 16 byte align */ |
| 332 | skb_put (skb, len); /* make room */ |
David S. Miller | 8c7b7fa | 2007-07-10 22:08:12 -0700 | [diff] [blame] | 333 | skb_copy_to_linear_data(skb, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | (unsigned char *)&(ib->rx_buf [lp->rx_new][0]), |
David S. Miller | 8c7b7fa | 2007-07-10 22:08:12 -0700 | [diff] [blame] | 335 | len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | skb->protocol = eth_type_trans (skb, dev); |
| 337 | netif_rx (skb); |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 338 | dev->stats.rx_packets++; |
| 339 | dev->stats.rx_bytes += len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | } |
| 341 | |
| 342 | /* Return the packet to the pool */ |
| 343 | rd->mblength = 0; |
| 344 | rd->rmd1_bits = LE_R1_OWN; |
| 345 | lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask; |
| 346 | } |
| 347 | return 0; |
| 348 | } |
| 349 | |
| 350 | static int lance_tx (struct net_device *dev) |
| 351 | { |
| 352 | struct lance_private *lp = netdev_priv(dev); |
| 353 | volatile struct lance_init_block *ib = lp->init_block; |
| 354 | volatile struct lance_tx_desc *td; |
| 355 | int i, j; |
| 356 | int status; |
| 357 | |
| 358 | #ifdef CONFIG_HP300 |
| 359 | blinken_leds(0x80, 0); |
| 360 | #endif |
| 361 | /* csr0 is 2f3 */ |
| 362 | WRITERDP(lp, LE_C0_TINT | LE_C0_INEA); |
| 363 | /* csr0 is 73 */ |
| 364 | |
| 365 | j = lp->tx_old; |
| 366 | for (i = j; i != lp->tx_new; i = j) { |
| 367 | td = &ib->btx_ring [i]; |
| 368 | |
| 369 | /* If we hit a packet not owned by us, stop */ |
| 370 | if (td->tmd1_bits & LE_T1_OWN) |
| 371 | break; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 372 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | if (td->tmd1_bits & LE_T1_ERR) { |
| 374 | status = td->misc; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 375 | |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 376 | dev->stats.tx_errors++; |
| 377 | if (status & LE_T3_RTY) dev->stats.tx_aborted_errors++; |
| 378 | if (status & LE_T3_LCOL) dev->stats.tx_window_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | |
| 380 | if (status & LE_T3_CLOS) { |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 381 | dev->stats.tx_carrier_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | if (lp->auto_select) { |
| 383 | lp->tpe = 1 - lp->tpe; |
| 384 | printk("%s: Carrier Lost, trying %s\n", |
| 385 | dev->name, lp->tpe?"TPE":"AUI"); |
| 386 | /* Stop the lance */ |
| 387 | WRITERAP(lp, LE_CSR0); |
| 388 | WRITERDP(lp, LE_C0_STOP); |
| 389 | lance_init_ring (dev); |
| 390 | load_csrs (lp); |
| 391 | init_restart_lance (lp); |
| 392 | return 0; |
| 393 | } |
| 394 | } |
| 395 | |
| 396 | /* buffer errors and underflows turn off the transmitter */ |
| 397 | /* Restart the adapter */ |
| 398 | if (status & (LE_T3_BUF|LE_T3_UFL)) { |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 399 | dev->stats.tx_fifo_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | |
| 401 | printk ("%s: Tx: ERR_BUF|ERR_UFL, restarting\n", |
| 402 | dev->name); |
| 403 | /* Stop the lance */ |
| 404 | WRITERAP(lp, LE_CSR0); |
| 405 | WRITERDP(lp, LE_C0_STOP); |
| 406 | lance_init_ring (dev); |
| 407 | load_csrs (lp); |
| 408 | init_restart_lance (lp); |
| 409 | return 0; |
| 410 | } |
| 411 | } else if ((td->tmd1_bits & LE_T1_POK) == LE_T1_POK) { |
| 412 | /* |
| 413 | * So we don't count the packet more than once. |
| 414 | */ |
| 415 | td->tmd1_bits &= ~(LE_T1_POK); |
| 416 | |
| 417 | /* One collision before packet was sent. */ |
| 418 | if (td->tmd1_bits & LE_T1_EONE) |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 419 | dev->stats.collisions++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | |
| 421 | /* More than one collision, be optimistic. */ |
| 422 | if (td->tmd1_bits & LE_T1_EMORE) |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 423 | dev->stats.collisions += 2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 425 | dev->stats.tx_packets++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | } |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 427 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | j = (j + 1) & lp->tx_ring_mod_mask; |
| 429 | } |
| 430 | lp->tx_old = j; |
| 431 | WRITERDP(lp, LE_C0_TINT | LE_C0_INEA); |
| 432 | return 0; |
| 433 | } |
| 434 | |
| 435 | static irqreturn_t |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 436 | lance_interrupt (int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | { |
| 438 | struct net_device *dev = (struct net_device *)dev_id; |
| 439 | struct lance_private *lp = netdev_priv(dev); |
| 440 | int csr0; |
| 441 | |
| 442 | spin_lock (&lp->devlock); |
| 443 | |
| 444 | WRITERAP(lp, LE_CSR0); /* LANCE Controller Status */ |
| 445 | csr0 = READRDP(lp); |
| 446 | |
| 447 | PRINT_RINGS(); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 448 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | if (!(csr0 & LE_C0_INTR)) { /* Check if any interrupt has */ |
| 450 | spin_unlock (&lp->devlock); |
| 451 | return IRQ_NONE; /* been generated by the Lance. */ |
| 452 | } |
| 453 | |
| 454 | /* Acknowledge all the interrupt sources ASAP */ |
| 455 | WRITERDP(lp, csr0 & ~(LE_C0_INEA|LE_C0_TDMD|LE_C0_STOP|LE_C0_STRT|LE_C0_INIT)); |
| 456 | |
| 457 | if ((csr0 & LE_C0_ERR)) { |
| 458 | /* Clear the error condition */ |
| 459 | WRITERDP(lp, LE_C0_BABL|LE_C0_ERR|LE_C0_MISS|LE_C0_INEA); |
| 460 | } |
| 461 | |
| 462 | if (csr0 & LE_C0_RINT) |
| 463 | lance_rx (dev); |
| 464 | |
| 465 | if (csr0 & LE_C0_TINT) |
| 466 | lance_tx (dev); |
| 467 | |
| 468 | /* Log misc errors. */ |
| 469 | if (csr0 & LE_C0_BABL) |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 470 | dev->stats.tx_errors++; /* Tx babble. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | if (csr0 & LE_C0_MISS) |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 472 | dev->stats.rx_errors++; /* Missed a Rx frame. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | if (csr0 & LE_C0_MERR) { |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 474 | printk("%s: Bus master arbitration failure, status %4.4x.\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | dev->name, csr0); |
| 476 | /* Restart the chip. */ |
| 477 | WRITERDP(lp, LE_C0_STRT); |
| 478 | } |
| 479 | |
| 480 | if (lp->tx_full && netif_queue_stopped(dev) && (TX_BUFFS_AVAIL >= 0)) { |
| 481 | lp->tx_full = 0; |
| 482 | netif_wake_queue (dev); |
| 483 | } |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 484 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | WRITERAP(lp, LE_CSR0); |
| 486 | WRITERDP(lp, LE_C0_BABL|LE_C0_CERR|LE_C0_MISS|LE_C0_MERR|LE_C0_IDON|LE_C0_INEA); |
| 487 | |
| 488 | spin_unlock (&lp->devlock); |
| 489 | return IRQ_HANDLED; |
| 490 | } |
| 491 | |
| 492 | int lance_open (struct net_device *dev) |
| 493 | { |
| 494 | struct lance_private *lp = netdev_priv(dev); |
| 495 | int res; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 496 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | /* Install the Interrupt handler. Or we could shunt this out to specific drivers? */ |
Thomas Gleixner | 38515e9 | 2007-02-14 00:33:16 -0800 | [diff] [blame] | 498 | if (request_irq(lp->irq, lance_interrupt, IRQF_SHARED, lp->name, dev)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | return -EAGAIN; |
| 500 | |
| 501 | res = lance_reset(dev); |
| 502 | spin_lock_init(&lp->devlock); |
| 503 | netif_start_queue (dev); |
| 504 | |
| 505 | return res; |
| 506 | } |
Adrian Bunk | bf4d593 | 2008-06-10 01:22:16 +0300 | [diff] [blame] | 507 | EXPORT_SYMBOL_GPL(lance_open); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | |
| 509 | int lance_close (struct net_device *dev) |
| 510 | { |
| 511 | struct lance_private *lp = netdev_priv(dev); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 512 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | netif_stop_queue (dev); |
| 514 | |
| 515 | /* Stop the LANCE */ |
| 516 | WRITERAP(lp, LE_CSR0); |
| 517 | WRITERDP(lp, LE_C0_STOP); |
| 518 | |
| 519 | free_irq(lp->irq, dev); |
| 520 | |
| 521 | return 0; |
| 522 | } |
Adrian Bunk | bf4d593 | 2008-06-10 01:22:16 +0300 | [diff] [blame] | 523 | EXPORT_SYMBOL_GPL(lance_close); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | |
| 525 | void lance_tx_timeout(struct net_device *dev) |
| 526 | { |
| 527 | printk("lance_tx_timeout\n"); |
| 528 | lance_reset(dev); |
| 529 | dev->trans_start = jiffies; |
| 530 | netif_wake_queue (dev); |
| 531 | } |
Adrian Bunk | bf4d593 | 2008-06-10 01:22:16 +0300 | [diff] [blame] | 532 | EXPORT_SYMBOL_GPL(lance_tx_timeout); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | |
| 534 | int lance_start_xmit (struct sk_buff *skb, struct net_device *dev) |
| 535 | { |
| 536 | struct lance_private *lp = netdev_priv(dev); |
| 537 | volatile struct lance_init_block *ib = lp->init_block; |
| 538 | int entry, skblen, len; |
| 539 | static int outs; |
| 540 | unsigned long flags; |
| 541 | |
| 542 | if (!TX_BUFFS_AVAIL) |
Patrick McHardy | 5b54814 | 2009-06-12 06:22:29 +0000 | [diff] [blame] | 543 | return NETDEV_TX_LOCKED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | |
| 545 | netif_stop_queue (dev); |
| 546 | |
| 547 | skblen = skb->len; |
| 548 | |
| 549 | #ifdef DEBUG_DRIVER |
| 550 | /* dump the packet */ |
| 551 | { |
| 552 | int i; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 553 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | for (i = 0; i < 64; i++) { |
| 555 | if ((i % 16) == 0) |
| 556 | printk ("\n"); |
| 557 | printk ("%2.2x ", skb->data [i]); |
| 558 | } |
| 559 | } |
| 560 | #endif |
| 561 | len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen; |
| 562 | entry = lp->tx_new & lp->tx_ring_mod_mask; |
| 563 | ib->btx_ring [entry].length = (-len) | 0xf000; |
| 564 | ib->btx_ring [entry].misc = 0; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 565 | |
Geert Uytterhoeven | cfa08bb | 2007-05-01 22:33:05 +0200 | [diff] [blame] | 566 | if (skb->len < ETH_ZLEN) |
| 567 | memset((void *)&ib->tx_buf[entry][0], 0, ETH_ZLEN); |
| 568 | skb_copy_from_linear_data(skb, (void *)&ib->tx_buf[entry][0], skblen); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 569 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | /* Now, give the packet to the lance */ |
| 571 | ib->btx_ring [entry].tmd1_bits = (LE_T1_POK|LE_T1_OWN); |
| 572 | lp->tx_new = (lp->tx_new+1) & lp->tx_ring_mod_mask; |
| 573 | |
| 574 | outs++; |
| 575 | /* Kick the lance: transmit now */ |
| 576 | WRITERDP(lp, LE_C0_INEA | LE_C0_TDMD); |
| 577 | dev->trans_start = jiffies; |
| 578 | dev_kfree_skb (skb); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 579 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | spin_lock_irqsave (&lp->devlock, flags); |
| 581 | if (TX_BUFFS_AVAIL) |
| 582 | netif_start_queue (dev); |
| 583 | else |
| 584 | lp->tx_full = 1; |
| 585 | spin_unlock_irqrestore (&lp->devlock, flags); |
| 586 | |
Patrick McHardy | ec634fe | 2009-07-05 19:23:38 -0700 | [diff] [blame] | 587 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | } |
Adrian Bunk | bf4d593 | 2008-06-10 01:22:16 +0300 | [diff] [blame] | 589 | EXPORT_SYMBOL_GPL(lance_start_xmit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | /* taken from the depca driver via a2065.c */ |
| 592 | static void lance_load_multicast (struct net_device *dev) |
| 593 | { |
| 594 | struct lance_private *lp = netdev_priv(dev); |
| 595 | volatile struct lance_init_block *ib = lp->init_block; |
| 596 | volatile u16 *mcast_table = (u16 *)&ib->filter; |
Jiri Pirko | 0ddf477 | 2010-02-20 00:13:58 +0000 | [diff] [blame] | 597 | struct dev_mc_list *dmi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | char *addrs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | u32 crc; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 600 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | /* set all multicast bits */ |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 602 | if (dev->flags & IFF_ALLMULTI){ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | ib->filter [0] = 0xffffffff; |
| 604 | ib->filter [1] = 0xffffffff; |
| 605 | return; |
| 606 | } |
| 607 | /* clear the multicast filter */ |
| 608 | ib->filter [0] = 0; |
| 609 | ib->filter [1] = 0; |
| 610 | |
| 611 | /* Add addresses */ |
Jiri Pirko | 0ddf477 | 2010-02-20 00:13:58 +0000 | [diff] [blame] | 612 | netdev_for_each_mc_addr(dmi, dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | addrs = dmi->dmi_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | |
| 615 | /* multicast address? */ |
| 616 | if (!(*addrs & 1)) |
| 617 | continue; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 618 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | crc = ether_crc_le(6, addrs); |
| 620 | crc = crc >> 26; |
| 621 | mcast_table [crc >> 4] |= 1 << (crc & 0xf); |
| 622 | } |
| 623 | return; |
| 624 | } |
| 625 | |
| 626 | |
| 627 | void lance_set_multicast (struct net_device *dev) |
| 628 | { |
| 629 | struct lance_private *lp = netdev_priv(dev); |
| 630 | volatile struct lance_init_block *ib = lp->init_block; |
| 631 | int stopped; |
| 632 | |
| 633 | stopped = netif_queue_stopped(dev); |
| 634 | if (!stopped) |
| 635 | netif_stop_queue (dev); |
| 636 | |
| 637 | while (lp->tx_old != lp->tx_new) |
| 638 | schedule(); |
| 639 | |
| 640 | WRITERAP(lp, LE_CSR0); |
| 641 | WRITERDP(lp, LE_C0_STOP); |
| 642 | lance_init_ring (dev); |
| 643 | |
| 644 | if (dev->flags & IFF_PROMISC) { |
| 645 | ib->mode |= LE_MO_PROM; |
| 646 | } else { |
| 647 | ib->mode &= ~LE_MO_PROM; |
| 648 | lance_load_multicast (dev); |
| 649 | } |
| 650 | load_csrs (lp); |
| 651 | init_restart_lance (lp); |
| 652 | |
| 653 | if (!stopped) |
| 654 | netif_start_queue (dev); |
| 655 | } |
Adrian Bunk | bf4d593 | 2008-06-10 01:22:16 +0300 | [diff] [blame] | 656 | EXPORT_SYMBOL_GPL(lance_set_multicast); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | |
| 658 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 659 | void lance_poll(struct net_device *dev) |
| 660 | { |
| 661 | struct lance_private *lp = netdev_priv(dev); |
| 662 | |
| 663 | spin_lock (&lp->devlock); |
| 664 | WRITERAP(lp, LE_CSR0); |
| 665 | WRITERDP(lp, LE_C0_STRT); |
| 666 | spin_unlock (&lp->devlock); |
Al Viro | 2850bc2 | 2006-10-07 14:16:45 +0100 | [diff] [blame] | 667 | lance_interrupt(dev->irq, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | } |
| 669 | #endif |
| 670 | |
| 671 | MODULE_LICENSE("GPL"); |