| 1 | /* 8390.c: A general NS8390 ethernet driver core for linux. */ |
| 2 | /* |
| 3 | Written 1992-94 by Donald Becker. |
| 4 | |
| 5 | Copyright 1993 United States Government as represented by the |
| 6 | Director, National Security Agency. |
| 7 | |
| 8 | This software may be used and distributed according to the terms |
| 9 | of the GNU General Public License, incorporated herein by reference. |
| 10 | |
| 11 | The author may be reached as becker@scyld.com, or C/O |
| 12 | Scyld Computing Corporation |
| 13 | 410 Severn Ave., Suite 210 |
| 14 | Annapolis MD 21403 |
| 15 | |
| 16 | |
| 17 | This is the chip-specific code for many 8390-based ethernet adaptors. |
| 18 | This is not a complete driver, it must be combined with board-specific |
| 19 | code such as ne.c, wd.c, 3c503.c, etc. |
| 20 | |
| 21 | Seeing how at least eight drivers use this code, (not counting the |
| 22 | PCMCIA ones either) it is easy to break some card by what seems like |
| 23 | a simple innocent change. Please contact me or Donald if you think |
| 24 | you have found something that needs changing. -- PG |
| 25 | |
| 26 | |
| 27 | Changelog: |
| 28 | |
| 29 | Paul Gortmaker : remove set_bit lock, other cleanups. |
| 30 | Paul Gortmaker : add ei_get_8390_hdr() so we can pass skb's to |
| 31 | ei_block_input() for eth_io_copy_and_sum(). |
| 32 | Paul Gortmaker : exchange static int ei_pingpong for a #define, |
| 33 | also add better Tx error handling. |
| 34 | Paul Gortmaker : rewrite Rx overrun handling as per NS specs. |
| 35 | Alexey Kuznetsov : use the 8390's six bit hash multicast filter. |
| 36 | Paul Gortmaker : tweak ANK's above multicast changes a bit. |
| 37 | Paul Gortmaker : update packet statistics for v2.1.x |
| 38 | Alan Cox : support arbitary stupid port mappings on the |
| 39 | 68K Macintosh. Support >16bit I/O spaces |
| 40 | Paul Gortmaker : add kmod support for auto-loading of the 8390 |
| 41 | module by all drivers that require it. |
| 42 | Alan Cox : Spinlocking work, added 'BUG_83C690' |
| 43 | Paul Gortmaker : Separate out Tx timeout code from Tx path. |
| 44 | Paul Gortmaker : Remove old unused single Tx buffer code. |
| 45 | Hayato Fujiwara : Add m32r support. |
| 46 | Paul Gortmaker : use skb_padto() instead of stack scratch area |
| 47 | |
| 48 | Sources: |
| 49 | The National Semiconductor LAN Databook, and the 3Com 3c503 databook. |
| 50 | |
| 51 | */ |
| 52 | |
| 53 | #include <linux/module.h> |
| 54 | #include <linux/kernel.h> |
| 55 | #include <linux/jiffies.h> |
| 56 | #include <linux/fs.h> |
| 57 | #include <linux/types.h> |
| 58 | #include <linux/string.h> |
| 59 | #include <linux/bitops.h> |
| 60 | #include <asm/system.h> |
| 61 | #include <asm/uaccess.h> |
| 62 | #include <asm/io.h> |
| 63 | #include <asm/irq.h> |
| 64 | #include <linux/delay.h> |
| 65 | #include <linux/errno.h> |
| 66 | #include <linux/fcntl.h> |
| 67 | #include <linux/in.h> |
| 68 | #include <linux/interrupt.h> |
| 69 | #include <linux/init.h> |
| 70 | #include <linux/crc32.h> |
| 71 | |
| 72 | #include <linux/netdevice.h> |
| 73 | #include <linux/etherdevice.h> |
| 74 | |
| 75 | #define NS8390_CORE |
| 76 | #include "8390.h" |
| 77 | |
| 78 | #define BUG_83C690 |
| 79 | |
| 80 | /* These are the operational function interfaces to board-specific |
| 81 | routines. |
| 82 | void reset_8390(struct net_device *dev) |
| 83 | Resets the board associated with DEV, including a hardware reset of |
| 84 | the 8390. This is only called when there is a transmit timeout, and |
| 85 | it is always followed by 8390_init(). |
| 86 | void block_output(struct net_device *dev, int count, const unsigned char *buf, |
| 87 | int start_page) |
| 88 | Write the COUNT bytes of BUF to the packet buffer at START_PAGE. The |
| 89 | "page" value uses the 8390's 256-byte pages. |
| 90 | void get_8390_hdr(struct net_device *dev, struct e8390_hdr *hdr, int ring_page) |
| 91 | Read the 4 byte, page aligned 8390 header. *If* there is a |
| 92 | subsequent read, it will be of the rest of the packet. |
| 93 | void block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset) |
| 94 | Read COUNT bytes from the packet buffer into the skb data area. Start |
| 95 | reading from RING_OFFSET, the address as the 8390 sees it. This will always |
| 96 | follow the read of the 8390 header. |
| 97 | */ |
| 98 | #define ei_reset_8390 (ei_local->reset_8390) |
| 99 | #define ei_block_output (ei_local->block_output) |
| 100 | #define ei_block_input (ei_local->block_input) |
| 101 | #define ei_get_8390_hdr (ei_local->get_8390_hdr) |
| 102 | |
| 103 | /* use 0 for production, 1 for verification, >2 for debug */ |
| 104 | #ifndef ei_debug |
| 105 | int ei_debug = 1; |
| 106 | #endif |
| 107 | |
| 108 | /* Index to functions. */ |
| 109 | static void ei_tx_intr(struct net_device *dev); |
| 110 | static void ei_tx_err(struct net_device *dev); |
| 111 | void ei_tx_timeout(struct net_device *dev); |
| 112 | static void ei_receive(struct net_device *dev); |
| 113 | static void ei_rx_overrun(struct net_device *dev); |
| 114 | |
| 115 | /* Routines generic to NS8390-based boards. */ |
| 116 | static void NS8390_trigger_send(struct net_device *dev, unsigned int length, |
| 117 | int start_page); |
| 118 | static void do_set_multicast_list(struct net_device *dev); |
| 119 | static void __NS8390_init(struct net_device *dev, int startp); |
| 120 | |
| 121 | /* |
| 122 | * SMP and the 8390 setup. |
| 123 | * |
| 124 | * The 8390 isnt exactly designed to be multithreaded on RX/TX. There is |
| 125 | * a page register that controls bank and packet buffer access. We guard |
| 126 | * this with ei_local->page_lock. Nobody should assume or set the page other |
| 127 | * than zero when the lock is not held. Lock holders must restore page 0 |
| 128 | * before unlocking. Even pure readers must take the lock to protect in |
| 129 | * page 0. |
| 130 | * |
| 131 | * To make life difficult the chip can also be very slow. We therefore can't |
| 132 | * just use spinlocks. For the longer lockups we disable the irq the device |
| 133 | * sits on and hold the lock. We must hold the lock because there is a dual |
| 134 | * processor case other than interrupts (get stats/set multicast list in |
| 135 | * parallel with each other and transmit). |
| 136 | * |
| 137 | * Note: in theory we can just disable the irq on the card _but_ there is |
| 138 | * a latency on SMP irq delivery. So we can easily go "disable irq" "sync irqs" |
| 139 | * enter lock, take the queued irq. So we waddle instead of flying. |
| 140 | * |
| 141 | * Finally by special arrangement for the purpose of being generally |
| 142 | * annoying the transmit function is called bh atomic. That places |
| 143 | * restrictions on the user context callers as disable_irq won't save |
| 144 | * them. |
| 145 | * |
| 146 | * Additional explanation of problems with locking by Alan Cox: |
| 147 | * |
| 148 | * "The author (me) didn't use spin_lock_irqsave because the slowness of the |
| 149 | * card means that approach caused horrible problems like losing serial data |
| 150 | * at 38400 baud on some chips. Remember many 8390 nics on PCI were ISA |
| 151 | * chips with FPGA front ends. |
| 152 | * |
| 153 | * Ok the logic behind the 8390 is very simple: |
| 154 | * |
| 155 | * Things to know |
| 156 | * - IRQ delivery is asynchronous to the PCI bus |
| 157 | * - Blocking the local CPU IRQ via spin locks was too slow |
| 158 | * - The chip has register windows needing locking work |
| 159 | * |
| 160 | * So the path was once (I say once as people appear to have changed it |
| 161 | * in the mean time and it now looks rather bogus if the changes to use |
| 162 | * disable_irq_nosync_irqsave are disabling the local IRQ) |
| 163 | * |
| 164 | * |
| 165 | * Take the page lock |
| 166 | * Mask the IRQ on chip |
| 167 | * Disable the IRQ (but not mask locally- someone seems to have |
| 168 | * broken this with the lock validator stuff) |
| 169 | * [This must be _nosync as the page lock may otherwise |
| 170 | * deadlock us] |
| 171 | * Drop the page lock and turn IRQs back on |
| 172 | * |
| 173 | * At this point an existing IRQ may still be running but we can't |
| 174 | * get a new one |
| 175 | * |
| 176 | * Take the lock (so we know the IRQ has terminated) but don't mask |
| 177 | * the IRQs on the processor |
| 178 | * Set irqlock [for debug] |
| 179 | * |
| 180 | * Transmit (slow as ****) |
| 181 | * |
| 182 | * re-enable the IRQ |
| 183 | * |
| 184 | * |
| 185 | * We have to use disable_irq because otherwise you will get delayed |
| 186 | * interrupts on the APIC bus deadlocking the transmit path. |
| 187 | * |
| 188 | * Quite hairy but the chip simply wasn't designed for SMP and you can't |
| 189 | * even ACK an interrupt without risking corrupting other parallel |
| 190 | * activities on the chip." [lkml, 25 Jul 2007] |
| 191 | */ |
| 192 | |
| 193 | |
| 194 | |
| 195 | /** |
| 196 | * ei_open - Open/initialize the board. |
| 197 | * @dev: network device to initialize |
| 198 | * |
| 199 | * This routine goes all-out, setting everything |
| 200 | * up anew at each open, even though many of these registers should only |
| 201 | * need to be set once at boot. |
| 202 | */ |
| 203 | static int __ei_open(struct net_device *dev) |
| 204 | { |
| 205 | unsigned long flags; |
| 206 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); |
| 207 | |
| 208 | if (dev->watchdog_timeo <= 0) |
| 209 | dev->watchdog_timeo = TX_TIMEOUT; |
| 210 | |
| 211 | /* |
| 212 | * Grab the page lock so we own the register set, then call |
| 213 | * the init function. |
| 214 | */ |
| 215 | |
| 216 | spin_lock_irqsave(&ei_local->page_lock, flags); |
| 217 | __NS8390_init(dev, 1); |
| 218 | /* Set the flag before we drop the lock, That way the IRQ arrives |
| 219 | after its set and we get no silly warnings */ |
| 220 | netif_start_queue(dev); |
| 221 | spin_unlock_irqrestore(&ei_local->page_lock, flags); |
| 222 | ei_local->irqlock = 0; |
| 223 | return 0; |
| 224 | } |
| 225 | |
| 226 | /** |
| 227 | * ei_close - shut down network device |
| 228 | * @dev: network device to close |
| 229 | * |
| 230 | * Opposite of ei_open(). Only used when "ifconfig <devname> down" is done. |
| 231 | */ |
| 232 | static int __ei_close(struct net_device *dev) |
| 233 | { |
| 234 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); |
| 235 | unsigned long flags; |
| 236 | |
| 237 | /* |
| 238 | * Hold the page lock during close |
| 239 | */ |
| 240 | |
| 241 | spin_lock_irqsave(&ei_local->page_lock, flags); |
| 242 | __NS8390_init(dev, 0); |
| 243 | spin_unlock_irqrestore(&ei_local->page_lock, flags); |
| 244 | netif_stop_queue(dev); |
| 245 | return 0; |
| 246 | } |
| 247 | |
| 248 | /** |
| 249 | * ei_tx_timeout - handle transmit time out condition |
| 250 | * @dev: network device which has apparently fallen asleep |
| 251 | * |
| 252 | * Called by kernel when device never acknowledges a transmit has |
| 253 | * completed (or failed) - i.e. never posted a Tx related interrupt. |
| 254 | */ |
| 255 | |
| 256 | static void __ei_tx_timeout(struct net_device *dev) |
| 257 | { |
| 258 | unsigned long e8390_base = dev->base_addr; |
| 259 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); |
| 260 | int txsr, isr, tickssofar = jiffies - dev->trans_start; |
| 261 | unsigned long flags; |
| 262 | |
| 263 | dev->stats.tx_errors++; |
| 264 | |
| 265 | spin_lock_irqsave(&ei_local->page_lock, flags); |
| 266 | txsr = ei_inb(e8390_base+EN0_TSR); |
| 267 | isr = ei_inb(e8390_base+EN0_ISR); |
| 268 | spin_unlock_irqrestore(&ei_local->page_lock, flags); |
| 269 | |
| 270 | printk(KERN_DEBUG "%s: Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d.\n", |
| 271 | dev->name, (txsr & ENTSR_ABT) ? "excess collisions." : |
| 272 | (isr) ? "lost interrupt?" : "cable problem?", txsr, isr, tickssofar); |
| 273 | |
| 274 | if (!isr && !dev->stats.tx_packets) |
| 275 | { |
| 276 | /* The 8390 probably hasn't gotten on the cable yet. */ |
| 277 | ei_local->interface_num ^= 1; /* Try a different xcvr. */ |
| 278 | } |
| 279 | |
| 280 | /* Ugly but a reset can be slow, yet must be protected */ |
| 281 | |
| 282 | disable_irq_nosync_lockdep(dev->irq); |
| 283 | spin_lock(&ei_local->page_lock); |
| 284 | |
| 285 | /* Try to restart the card. Perhaps the user has fixed something. */ |
| 286 | ei_reset_8390(dev); |
| 287 | __NS8390_init(dev, 1); |
| 288 | |
| 289 | spin_unlock(&ei_local->page_lock); |
| 290 | enable_irq_lockdep(dev->irq); |
| 291 | netif_wake_queue(dev); |
| 292 | } |
| 293 | |
| 294 | /** |
| 295 | * ei_start_xmit - begin packet transmission |
| 296 | * @skb: packet to be sent |
| 297 | * @dev: network device to which packet is sent |
| 298 | * |
| 299 | * Sends a packet to an 8390 network device. |
| 300 | */ |
| 301 | |
| 302 | static netdev_tx_t __ei_start_xmit(struct sk_buff *skb, |
| 303 | struct net_device *dev) |
| 304 | { |
| 305 | unsigned long e8390_base = dev->base_addr; |
| 306 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); |
| 307 | int send_length = skb->len, output_page; |
| 308 | unsigned long flags; |
| 309 | char buf[ETH_ZLEN]; |
| 310 | char *data = skb->data; |
| 311 | |
| 312 | if (skb->len < ETH_ZLEN) { |
| 313 | memset(buf, 0, ETH_ZLEN); /* more efficient than doing just the needed bits */ |
| 314 | memcpy(buf, data, skb->len); |
| 315 | send_length = ETH_ZLEN; |
| 316 | data = buf; |
| 317 | } |
| 318 | |
| 319 | /* Mask interrupts from the ethercard. |
| 320 | SMP: We have to grab the lock here otherwise the IRQ handler |
| 321 | on another CPU can flip window and race the IRQ mask set. We end |
| 322 | up trashing the mcast filter not disabling irqs if we don't lock */ |
| 323 | |
| 324 | spin_lock_irqsave(&ei_local->page_lock, flags); |
| 325 | ei_outb_p(0x00, e8390_base + EN0_IMR); |
| 326 | spin_unlock_irqrestore(&ei_local->page_lock, flags); |
| 327 | |
| 328 | |
| 329 | /* |
| 330 | * Slow phase with lock held. |
| 331 | */ |
| 332 | |
| 333 | disable_irq_nosync_lockdep_irqsave(dev->irq, &flags); |
| 334 | |
| 335 | spin_lock(&ei_local->page_lock); |
| 336 | |
| 337 | ei_local->irqlock = 1; |
| 338 | |
| 339 | /* |
| 340 | * We have two Tx slots available for use. Find the first free |
| 341 | * slot, and then perform some sanity checks. With two Tx bufs, |
| 342 | * you get very close to transmitting back-to-back packets. With |
| 343 | * only one Tx buf, the transmitter sits idle while you reload the |
| 344 | * card, leaving a substantial gap between each transmitted packet. |
| 345 | */ |
| 346 | |
| 347 | if (ei_local->tx1 == 0) |
| 348 | { |
| 349 | output_page = ei_local->tx_start_page; |
| 350 | ei_local->tx1 = send_length; |
| 351 | if (ei_debug && ei_local->tx2 > 0) |
| 352 | printk(KERN_DEBUG "%s: idle transmitter tx2=%d, lasttx=%d, txing=%d.\n", |
| 353 | dev->name, ei_local->tx2, ei_local->lasttx, ei_local->txing); |
| 354 | } |
| 355 | else if (ei_local->tx2 == 0) |
| 356 | { |
| 357 | output_page = ei_local->tx_start_page + TX_PAGES/2; |
| 358 | ei_local->tx2 = send_length; |
| 359 | if (ei_debug && ei_local->tx1 > 0) |
| 360 | printk(KERN_DEBUG "%s: idle transmitter, tx1=%d, lasttx=%d, txing=%d.\n", |
| 361 | dev->name, ei_local->tx1, ei_local->lasttx, ei_local->txing); |
| 362 | } |
| 363 | else |
| 364 | { /* We should never get here. */ |
| 365 | if (ei_debug) |
| 366 | printk(KERN_DEBUG "%s: No Tx buffers free! tx1=%d tx2=%d last=%d\n", |
| 367 | dev->name, ei_local->tx1, ei_local->tx2, ei_local->lasttx); |
| 368 | ei_local->irqlock = 0; |
| 369 | netif_stop_queue(dev); |
| 370 | ei_outb_p(ENISR_ALL, e8390_base + EN0_IMR); |
| 371 | spin_unlock(&ei_local->page_lock); |
| 372 | enable_irq_lockdep_irqrestore(dev->irq, &flags); |
| 373 | dev->stats.tx_errors++; |
| 374 | return NETDEV_TX_BUSY; |
| 375 | } |
| 376 | |
| 377 | /* |
| 378 | * Okay, now upload the packet and trigger a send if the transmitter |
| 379 | * isn't already sending. If it is busy, the interrupt handler will |
| 380 | * trigger the send later, upon receiving a Tx done interrupt. |
| 381 | */ |
| 382 | |
| 383 | ei_block_output(dev, send_length, data, output_page); |
| 384 | |
| 385 | if (! ei_local->txing) |
| 386 | { |
| 387 | ei_local->txing = 1; |
| 388 | NS8390_trigger_send(dev, send_length, output_page); |
| 389 | dev->trans_start = jiffies; |
| 390 | if (output_page == ei_local->tx_start_page) |
| 391 | { |
| 392 | ei_local->tx1 = -1; |
| 393 | ei_local->lasttx = -1; |
| 394 | } |
| 395 | else |
| 396 | { |
| 397 | ei_local->tx2 = -1; |
| 398 | ei_local->lasttx = -2; |
| 399 | } |
| 400 | } |
| 401 | else ei_local->txqueue++; |
| 402 | |
| 403 | if (ei_local->tx1 && ei_local->tx2) |
| 404 | netif_stop_queue(dev); |
| 405 | else |
| 406 | netif_start_queue(dev); |
| 407 | |
| 408 | /* Turn 8390 interrupts back on. */ |
| 409 | ei_local->irqlock = 0; |
| 410 | ei_outb_p(ENISR_ALL, e8390_base + EN0_IMR); |
| 411 | |
| 412 | spin_unlock(&ei_local->page_lock); |
| 413 | enable_irq_lockdep_irqrestore(dev->irq, &flags); |
| 414 | |
| 415 | dev_kfree_skb (skb); |
| 416 | dev->stats.tx_bytes += send_length; |
| 417 | |
| 418 | return NETDEV_TX_OK; |
| 419 | } |
| 420 | |
| 421 | /** |
| 422 | * ei_interrupt - handle the interrupts from an 8390 |
| 423 | * @irq: interrupt number |
| 424 | * @dev_id: a pointer to the net_device |
| 425 | * |
| 426 | * Handle the ether interface interrupts. We pull packets from |
| 427 | * the 8390 via the card specific functions and fire them at the networking |
| 428 | * stack. We also handle transmit completions and wake the transmit path if |
| 429 | * necessary. We also update the counters and do other housekeeping as |
| 430 | * needed. |
| 431 | */ |
| 432 | |
| 433 | static irqreturn_t __ei_interrupt(int irq, void *dev_id) |
| 434 | { |
| 435 | struct net_device *dev = dev_id; |
| 436 | unsigned long e8390_base = dev->base_addr; |
| 437 | int interrupts, nr_serviced = 0; |
| 438 | struct ei_device *ei_local = netdev_priv(dev); |
| 439 | |
| 440 | /* |
| 441 | * Protect the irq test too. |
| 442 | */ |
| 443 | |
| 444 | spin_lock(&ei_local->page_lock); |
| 445 | |
| 446 | if (ei_local->irqlock) |
| 447 | { |
| 448 | #if 1 /* This might just be an interrupt for a PCI device sharing this line */ |
| 449 | /* The "irqlock" check is only for testing. */ |
| 450 | printk(ei_local->irqlock |
| 451 | ? "%s: Interrupted while interrupts are masked! isr=%#2x imr=%#2x.\n" |
| 452 | : "%s: Reentering the interrupt handler! isr=%#2x imr=%#2x.\n", |
| 453 | dev->name, ei_inb_p(e8390_base + EN0_ISR), |
| 454 | ei_inb_p(e8390_base + EN0_IMR)); |
| 455 | #endif |
| 456 | spin_unlock(&ei_local->page_lock); |
| 457 | return IRQ_NONE; |
| 458 | } |
| 459 | |
| 460 | /* Change to page 0 and read the intr status reg. */ |
| 461 | ei_outb_p(E8390_NODMA+E8390_PAGE0, e8390_base + E8390_CMD); |
| 462 | if (ei_debug > 3) |
| 463 | printk(KERN_DEBUG "%s: interrupt(isr=%#2.2x).\n", dev->name, |
| 464 | ei_inb_p(e8390_base + EN0_ISR)); |
| 465 | |
| 466 | /* !!Assumption!! -- we stay in page 0. Don't break this. */ |
| 467 | while ((interrupts = ei_inb_p(e8390_base + EN0_ISR)) != 0 |
| 468 | && ++nr_serviced < MAX_SERVICE) |
| 469 | { |
| 470 | if (!netif_running(dev)) { |
| 471 | printk(KERN_WARNING "%s: interrupt from stopped card\n", dev->name); |
| 472 | /* rmk - acknowledge the interrupts */ |
| 473 | ei_outb_p(interrupts, e8390_base + EN0_ISR); |
| 474 | interrupts = 0; |
| 475 | break; |
| 476 | } |
| 477 | if (interrupts & ENISR_OVER) |
| 478 | ei_rx_overrun(dev); |
| 479 | else if (interrupts & (ENISR_RX+ENISR_RX_ERR)) |
| 480 | { |
| 481 | /* Got a good (?) packet. */ |
| 482 | ei_receive(dev); |
| 483 | } |
| 484 | /* Push the next to-transmit packet through. */ |
| 485 | if (interrupts & ENISR_TX) |
| 486 | ei_tx_intr(dev); |
| 487 | else if (interrupts & ENISR_TX_ERR) |
| 488 | ei_tx_err(dev); |
| 489 | |
| 490 | if (interrupts & ENISR_COUNTERS) |
| 491 | { |
| 492 | dev->stats.rx_frame_errors += ei_inb_p(e8390_base + EN0_COUNTER0); |
| 493 | dev->stats.rx_crc_errors += ei_inb_p(e8390_base + EN0_COUNTER1); |
| 494 | dev->stats.rx_missed_errors+= ei_inb_p(e8390_base + EN0_COUNTER2); |
| 495 | ei_outb_p(ENISR_COUNTERS, e8390_base + EN0_ISR); /* Ack intr. */ |
| 496 | } |
| 497 | |
| 498 | /* Ignore any RDC interrupts that make it back to here. */ |
| 499 | if (interrupts & ENISR_RDC) |
| 500 | { |
| 501 | ei_outb_p(ENISR_RDC, e8390_base + EN0_ISR); |
| 502 | } |
| 503 | |
| 504 | ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base + E8390_CMD); |
| 505 | } |
| 506 | |
| 507 | if (interrupts && ei_debug) |
| 508 | { |
| 509 | ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base + E8390_CMD); |
| 510 | if (nr_serviced >= MAX_SERVICE) |
| 511 | { |
| 512 | /* 0xFF is valid for a card removal */ |
| 513 | if(interrupts!=0xFF) |
| 514 | printk(KERN_WARNING "%s: Too much work at interrupt, status %#2.2x\n", |
| 515 | dev->name, interrupts); |
| 516 | ei_outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */ |
| 517 | } else { |
| 518 | printk(KERN_WARNING "%s: unknown interrupt %#2x\n", dev->name, interrupts); |
| 519 | ei_outb_p(0xff, e8390_base + EN0_ISR); /* Ack. all intrs. */ |
| 520 | } |
| 521 | } |
| 522 | spin_unlock(&ei_local->page_lock); |
| 523 | return IRQ_RETVAL(nr_serviced > 0); |
| 524 | } |
| 525 | |
| 526 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 527 | static void __ei_poll(struct net_device *dev) |
| 528 | { |
| 529 | disable_irq(dev->irq); |
| 530 | __ei_interrupt(dev->irq, dev); |
| 531 | enable_irq(dev->irq); |
| 532 | } |
| 533 | #endif |
| 534 | |
| 535 | /** |
| 536 | * ei_tx_err - handle transmitter error |
| 537 | * @dev: network device which threw the exception |
| 538 | * |
| 539 | * A transmitter error has happened. Most likely excess collisions (which |
| 540 | * is a fairly normal condition). If the error is one where the Tx will |
| 541 | * have been aborted, we try and send another one right away, instead of |
| 542 | * letting the failed packet sit and collect dust in the Tx buffer. This |
| 543 | * is a much better solution as it avoids kernel based Tx timeouts, and |
| 544 | * an unnecessary card reset. |
| 545 | * |
| 546 | * Called with lock held. |
| 547 | */ |
| 548 | |
| 549 | static void ei_tx_err(struct net_device *dev) |
| 550 | { |
| 551 | unsigned long e8390_base = dev->base_addr; |
| 552 | /* ei_local is used on some platforms via the EI_SHIFT macro */ |
| 553 | struct ei_device *ei_local __maybe_unused = netdev_priv(dev); |
| 554 | unsigned char txsr = ei_inb_p(e8390_base+EN0_TSR); |
| 555 | unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU); |
| 556 | |
| 557 | #ifdef VERBOSE_ERROR_DUMP |
| 558 | printk(KERN_DEBUG "%s: transmitter error (%#2x): ", dev->name, txsr); |
| 559 | if (txsr & ENTSR_ABT) |
| 560 | printk("excess-collisions "); |
| 561 | if (txsr & ENTSR_ND) |
| 562 | printk("non-deferral "); |
| 563 | if (txsr & ENTSR_CRS) |
| 564 | printk("lost-carrier "); |
| 565 | if (txsr & ENTSR_FU) |
| 566 | printk("FIFO-underrun "); |
| 567 | if (txsr & ENTSR_CDH) |
| 568 | printk("lost-heartbeat "); |
| 569 | printk("\n"); |
| 570 | #endif |
| 571 | |
| 572 | ei_outb_p(ENISR_TX_ERR, e8390_base + EN0_ISR); /* Ack intr. */ |
| 573 | |
| 574 | if (tx_was_aborted) |
| 575 | ei_tx_intr(dev); |
| 576 | else |
| 577 | { |
| 578 | dev->stats.tx_errors++; |
| 579 | if (txsr & ENTSR_CRS) dev->stats.tx_carrier_errors++; |
| 580 | if (txsr & ENTSR_CDH) dev->stats.tx_heartbeat_errors++; |
| 581 | if (txsr & ENTSR_OWC) dev->stats.tx_window_errors++; |
| 582 | } |
| 583 | } |
| 584 | |
| 585 | /** |
| 586 | * ei_tx_intr - transmit interrupt handler |
| 587 | * @dev: network device for which tx intr is handled |
| 588 | * |
| 589 | * We have finished a transmit: check for errors and then trigger the next |
| 590 | * packet to be sent. Called with lock held. |
| 591 | */ |
| 592 | |
| 593 | static void ei_tx_intr(struct net_device *dev) |
| 594 | { |
| 595 | unsigned long e8390_base = dev->base_addr; |
| 596 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); |
| 597 | int status = ei_inb(e8390_base + EN0_TSR); |
| 598 | |
| 599 | ei_outb_p(ENISR_TX, e8390_base + EN0_ISR); /* Ack intr. */ |
| 600 | |
| 601 | /* |
| 602 | * There are two Tx buffers, see which one finished, and trigger |
| 603 | * the send of another one if it exists. |
| 604 | */ |
| 605 | ei_local->txqueue--; |
| 606 | |
| 607 | if (ei_local->tx1 < 0) |
| 608 | { |
| 609 | if (ei_local->lasttx != 1 && ei_local->lasttx != -1) |
| 610 | printk(KERN_ERR "%s: bogus last_tx_buffer %d, tx1=%d.\n", |
| 611 | ei_local->name, ei_local->lasttx, ei_local->tx1); |
| 612 | ei_local->tx1 = 0; |
| 613 | if (ei_local->tx2 > 0) |
| 614 | { |
| 615 | ei_local->txing = 1; |
| 616 | NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6); |
| 617 | dev->trans_start = jiffies; |
| 618 | ei_local->tx2 = -1, |
| 619 | ei_local->lasttx = 2; |
| 620 | } |
| 621 | else ei_local->lasttx = 20, ei_local->txing = 0; |
| 622 | } |
| 623 | else if (ei_local->tx2 < 0) |
| 624 | { |
| 625 | if (ei_local->lasttx != 2 && ei_local->lasttx != -2) |
| 626 | printk("%s: bogus last_tx_buffer %d, tx2=%d.\n", |
| 627 | ei_local->name, ei_local->lasttx, ei_local->tx2); |
| 628 | ei_local->tx2 = 0; |
| 629 | if (ei_local->tx1 > 0) |
| 630 | { |
| 631 | ei_local->txing = 1; |
| 632 | NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page); |
| 633 | dev->trans_start = jiffies; |
| 634 | ei_local->tx1 = -1; |
| 635 | ei_local->lasttx = 1; |
| 636 | } |
| 637 | else |
| 638 | ei_local->lasttx = 10, ei_local->txing = 0; |
| 639 | } |
| 640 | // else printk(KERN_WARNING "%s: unexpected TX-done interrupt, lasttx=%d.\n", |
| 641 | // dev->name, ei_local->lasttx); |
| 642 | |
| 643 | /* Minimize Tx latency: update the statistics after we restart TXing. */ |
| 644 | if (status & ENTSR_COL) |
| 645 | dev->stats.collisions++; |
| 646 | if (status & ENTSR_PTX) |
| 647 | dev->stats.tx_packets++; |
| 648 | else |
| 649 | { |
| 650 | dev->stats.tx_errors++; |
| 651 | if (status & ENTSR_ABT) |
| 652 | { |
| 653 | dev->stats.tx_aborted_errors++; |
| 654 | dev->stats.collisions += 16; |
| 655 | } |
| 656 | if (status & ENTSR_CRS) |
| 657 | dev->stats.tx_carrier_errors++; |
| 658 | if (status & ENTSR_FU) |
| 659 | dev->stats.tx_fifo_errors++; |
| 660 | if (status & ENTSR_CDH) |
| 661 | dev->stats.tx_heartbeat_errors++; |
| 662 | if (status & ENTSR_OWC) |
| 663 | dev->stats.tx_window_errors++; |
| 664 | } |
| 665 | netif_wake_queue(dev); |
| 666 | } |
| 667 | |
| 668 | /** |
| 669 | * ei_receive - receive some packets |
| 670 | * @dev: network device with which receive will be run |
| 671 | * |
| 672 | * We have a good packet(s), get it/them out of the buffers. |
| 673 | * Called with lock held. |
| 674 | */ |
| 675 | |
| 676 | static void ei_receive(struct net_device *dev) |
| 677 | { |
| 678 | unsigned long e8390_base = dev->base_addr; |
| 679 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); |
| 680 | unsigned char rxing_page, this_frame, next_frame; |
| 681 | unsigned short current_offset; |
| 682 | int rx_pkt_count = 0; |
| 683 | struct e8390_pkt_hdr rx_frame; |
| 684 | int num_rx_pages = ei_local->stop_page-ei_local->rx_start_page; |
| 685 | |
| 686 | while (++rx_pkt_count < 10) |
| 687 | { |
| 688 | int pkt_len, pkt_stat; |
| 689 | |
| 690 | /* Get the rx page (incoming packet pointer). */ |
| 691 | ei_outb_p(E8390_NODMA+E8390_PAGE1, e8390_base + E8390_CMD); |
| 692 | rxing_page = ei_inb_p(e8390_base + EN1_CURPAG); |
| 693 | ei_outb_p(E8390_NODMA+E8390_PAGE0, e8390_base + E8390_CMD); |
| 694 | |
| 695 | /* Remove one frame from the ring. Boundary is always a page behind. */ |
| 696 | this_frame = ei_inb_p(e8390_base + EN0_BOUNDARY) + 1; |
| 697 | if (this_frame >= ei_local->stop_page) |
| 698 | this_frame = ei_local->rx_start_page; |
| 699 | |
| 700 | /* Someday we'll omit the previous, iff we never get this message. |
| 701 | (There is at least one clone claimed to have a problem.) |
| 702 | |
| 703 | Keep quiet if it looks like a card removal. One problem here |
| 704 | is that some clones crash in roughly the same way. |
| 705 | */ |
| 706 | if (ei_debug > 0 && this_frame != ei_local->current_page && (this_frame!=0x0 || rxing_page!=0xFF)) |
| 707 | printk(KERN_ERR "%s: mismatched read page pointers %2x vs %2x.\n", |
| 708 | dev->name, this_frame, ei_local->current_page); |
| 709 | |
| 710 | if (this_frame == rxing_page) /* Read all the frames? */ |
| 711 | break; /* Done for now */ |
| 712 | |
| 713 | current_offset = this_frame << 8; |
| 714 | ei_get_8390_hdr(dev, &rx_frame, this_frame); |
| 715 | |
| 716 | pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr); |
| 717 | pkt_stat = rx_frame.status; |
| 718 | |
| 719 | next_frame = this_frame + 1 + ((pkt_len+4)>>8); |
| 720 | |
| 721 | /* Check for bogosity warned by 3c503 book: the status byte is never |
| 722 | written. This happened a lot during testing! This code should be |
| 723 | cleaned up someday. */ |
| 724 | if (rx_frame.next != next_frame |
| 725 | && rx_frame.next != next_frame + 1 |
| 726 | && rx_frame.next != next_frame - num_rx_pages |
| 727 | && rx_frame.next != next_frame + 1 - num_rx_pages) { |
| 728 | ei_local->current_page = rxing_page; |
| 729 | ei_outb(ei_local->current_page-1, e8390_base+EN0_BOUNDARY); |
| 730 | dev->stats.rx_errors++; |
| 731 | continue; |
| 732 | } |
| 733 | |
| 734 | if (pkt_len < 60 || pkt_len > 1518) |
| 735 | { |
| 736 | if (ei_debug) |
| 737 | printk(KERN_DEBUG "%s: bogus packet size: %d, status=%#2x nxpg=%#2x.\n", |
| 738 | dev->name, rx_frame.count, rx_frame.status, |
| 739 | rx_frame.next); |
| 740 | dev->stats.rx_errors++; |
| 741 | dev->stats.rx_length_errors++; |
| 742 | } |
| 743 | else if ((pkt_stat & 0x0F) == ENRSR_RXOK) |
| 744 | { |
| 745 | struct sk_buff *skb; |
| 746 | |
| 747 | skb = dev_alloc_skb(pkt_len+2); |
| 748 | if (skb == NULL) |
| 749 | { |
| 750 | if (ei_debug > 1) |
| 751 | printk(KERN_DEBUG "%s: Couldn't allocate a sk_buff of size %d.\n", |
| 752 | dev->name, pkt_len); |
| 753 | dev->stats.rx_dropped++; |
| 754 | break; |
| 755 | } |
| 756 | else |
| 757 | { |
| 758 | skb_reserve(skb,2); /* IP headers on 16 byte boundaries */ |
| 759 | skb_put(skb, pkt_len); /* Make room */ |
| 760 | ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame)); |
| 761 | skb->protocol=eth_type_trans(skb,dev); |
| 762 | netif_rx(skb); |
| 763 | dev->stats.rx_packets++; |
| 764 | dev->stats.rx_bytes += pkt_len; |
| 765 | if (pkt_stat & ENRSR_PHY) |
| 766 | dev->stats.multicast++; |
| 767 | } |
| 768 | } |
| 769 | else |
| 770 | { |
| 771 | if (ei_debug) |
| 772 | printk(KERN_DEBUG "%s: bogus packet: status=%#2x nxpg=%#2x size=%d\n", |
| 773 | dev->name, rx_frame.status, rx_frame.next, |
| 774 | rx_frame.count); |
| 775 | dev->stats.rx_errors++; |
| 776 | /* NB: The NIC counts CRC, frame and missed errors. */ |
| 777 | if (pkt_stat & ENRSR_FO) |
| 778 | dev->stats.rx_fifo_errors++; |
| 779 | } |
| 780 | next_frame = rx_frame.next; |
| 781 | |
| 782 | /* This _should_ never happen: it's here for avoiding bad clones. */ |
| 783 | if (next_frame >= ei_local->stop_page) { |
| 784 | printk("%s: next frame inconsistency, %#2x\n", dev->name, |
| 785 | next_frame); |
| 786 | next_frame = ei_local->rx_start_page; |
| 787 | } |
| 788 | ei_local->current_page = next_frame; |
| 789 | ei_outb_p(next_frame-1, e8390_base+EN0_BOUNDARY); |
| 790 | } |
| 791 | |
| 792 | /* We used to also ack ENISR_OVER here, but that would sometimes mask |
| 793 | a real overrun, leaving the 8390 in a stopped state with rec'vr off. */ |
| 794 | ei_outb_p(ENISR_RX+ENISR_RX_ERR, e8390_base+EN0_ISR); |
| 795 | return; |
| 796 | } |
| 797 | |
| 798 | /** |
| 799 | * ei_rx_overrun - handle receiver overrun |
| 800 | * @dev: network device which threw exception |
| 801 | * |
| 802 | * We have a receiver overrun: we have to kick the 8390 to get it started |
| 803 | * again. Problem is that you have to kick it exactly as NS prescribes in |
| 804 | * the updated datasheets, or "the NIC may act in an unpredictable manner." |
| 805 | * This includes causing "the NIC to defer indefinitely when it is stopped |
| 806 | * on a busy network." Ugh. |
| 807 | * Called with lock held. Don't call this with the interrupts off or your |
| 808 | * computer will hate you - it takes 10ms or so. |
| 809 | */ |
| 810 | |
| 811 | static void ei_rx_overrun(struct net_device *dev) |
| 812 | { |
| 813 | unsigned long e8390_base = dev->base_addr; |
| 814 | unsigned char was_txing, must_resend = 0; |
| 815 | /* ei_local is used on some platforms via the EI_SHIFT macro */ |
| 816 | struct ei_device *ei_local __maybe_unused = netdev_priv(dev); |
| 817 | |
| 818 | /* |
| 819 | * Record whether a Tx was in progress and then issue the |
| 820 | * stop command. |
| 821 | */ |
| 822 | was_txing = ei_inb_p(e8390_base+E8390_CMD) & E8390_TRANS; |
| 823 | ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); |
| 824 | |
| 825 | if (ei_debug > 1) |
| 826 | printk(KERN_DEBUG "%s: Receiver overrun.\n", dev->name); |
| 827 | dev->stats.rx_over_errors++; |
| 828 | |
| 829 | /* |
| 830 | * Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total. |
| 831 | * Early datasheets said to poll the reset bit, but now they say that |
| 832 | * it "is not a reliable indicator and subsequently should be ignored." |
| 833 | * We wait at least 10ms. |
| 834 | */ |
| 835 | |
| 836 | mdelay(10); |
| 837 | |
| 838 | /* |
| 839 | * Reset RBCR[01] back to zero as per magic incantation. |
| 840 | */ |
| 841 | ei_outb_p(0x00, e8390_base+EN0_RCNTLO); |
| 842 | ei_outb_p(0x00, e8390_base+EN0_RCNTHI); |
| 843 | |
| 844 | /* |
| 845 | * See if any Tx was interrupted or not. According to NS, this |
| 846 | * step is vital, and skipping it will cause no end of havoc. |
| 847 | */ |
| 848 | |
| 849 | if (was_txing) |
| 850 | { |
| 851 | unsigned char tx_completed = ei_inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR); |
| 852 | if (!tx_completed) |
| 853 | must_resend = 1; |
| 854 | } |
| 855 | |
| 856 | /* |
| 857 | * Have to enter loopback mode and then restart the NIC before |
| 858 | * you are allowed to slurp packets up off the ring. |
| 859 | */ |
| 860 | ei_outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); |
| 861 | ei_outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD); |
| 862 | |
| 863 | /* |
| 864 | * Clear the Rx ring of all the debris, and ack the interrupt. |
| 865 | */ |
| 866 | ei_receive(dev); |
| 867 | ei_outb_p(ENISR_OVER, e8390_base+EN0_ISR); |
| 868 | |
| 869 | /* |
| 870 | * Leave loopback mode, and resend any packet that got stopped. |
| 871 | */ |
| 872 | ei_outb_p(E8390_TXCONFIG, e8390_base + EN0_TXCR); |
| 873 | if (must_resend) |
| 874 | ei_outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD); |
| 875 | } |
| 876 | |
| 877 | /* |
| 878 | * Collect the stats. This is called unlocked and from several contexts. |
| 879 | */ |
| 880 | |
| 881 | static struct net_device_stats *__ei_get_stats(struct net_device *dev) |
| 882 | { |
| 883 | unsigned long ioaddr = dev->base_addr; |
| 884 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); |
| 885 | unsigned long flags; |
| 886 | |
| 887 | /* If the card is stopped, just return the present stats. */ |
| 888 | if (!netif_running(dev)) |
| 889 | return &dev->stats; |
| 890 | |
| 891 | spin_lock_irqsave(&ei_local->page_lock,flags); |
| 892 | /* Read the counter registers, assuming we are in page 0. */ |
| 893 | dev->stats.rx_frame_errors += ei_inb_p(ioaddr + EN0_COUNTER0); |
| 894 | dev->stats.rx_crc_errors += ei_inb_p(ioaddr + EN0_COUNTER1); |
| 895 | dev->stats.rx_missed_errors+= ei_inb_p(ioaddr + EN0_COUNTER2); |
| 896 | spin_unlock_irqrestore(&ei_local->page_lock, flags); |
| 897 | |
| 898 | return &dev->stats; |
| 899 | } |
| 900 | |
| 901 | /* |
| 902 | * Form the 64 bit 8390 multicast table from the linked list of addresses |
| 903 | * associated with this dev structure. |
| 904 | */ |
| 905 | |
| 906 | static inline void make_mc_bits(u8 *bits, struct net_device *dev) |
| 907 | { |
| 908 | struct dev_mc_list *dmi; |
| 909 | |
| 910 | for (dmi=dev->mc_list; dmi; dmi=dmi->next) |
| 911 | { |
| 912 | u32 crc; |
| 913 | if (dmi->dmi_addrlen != ETH_ALEN) |
| 914 | { |
| 915 | printk(KERN_INFO "%s: invalid multicast address length given.\n", dev->name); |
| 916 | continue; |
| 917 | } |
| 918 | crc = ether_crc(ETH_ALEN, dmi->dmi_addr); |
| 919 | /* |
| 920 | * The 8390 uses the 6 most significant bits of the |
| 921 | * CRC to index the multicast table. |
| 922 | */ |
| 923 | bits[crc>>29] |= (1<<((crc>>26)&7)); |
| 924 | } |
| 925 | } |
| 926 | |
| 927 | /** |
| 928 | * do_set_multicast_list - set/clear multicast filter |
| 929 | * @dev: net device for which multicast filter is adjusted |
| 930 | * |
| 931 | * Set or clear the multicast filter for this adaptor. May be called |
| 932 | * from a BH in 2.1.x. Must be called with lock held. |
| 933 | */ |
| 934 | |
| 935 | static void do_set_multicast_list(struct net_device *dev) |
| 936 | { |
| 937 | unsigned long e8390_base = dev->base_addr; |
| 938 | int i; |
| 939 | struct ei_device *ei_local = (struct ei_device*)netdev_priv(dev); |
| 940 | |
| 941 | if (!(dev->flags&(IFF_PROMISC|IFF_ALLMULTI))) |
| 942 | { |
| 943 | memset(ei_local->mcfilter, 0, 8); |
| 944 | if (dev->mc_list) |
| 945 | make_mc_bits(ei_local->mcfilter, dev); |
| 946 | } |
| 947 | else |
| 948 | memset(ei_local->mcfilter, 0xFF, 8); /* mcast set to accept-all */ |
| 949 | |
| 950 | /* |
| 951 | * DP8390 manuals don't specify any magic sequence for altering |
| 952 | * the multicast regs on an already running card. To be safe, we |
| 953 | * ensure multicast mode is off prior to loading up the new hash |
| 954 | * table. If this proves to be not enough, we can always resort |
| 955 | * to stopping the NIC, loading the table and then restarting. |
| 956 | * |
| 957 | * Bug Alert! The MC regs on the SMC 83C690 (SMC Elite and SMC |
| 958 | * Elite16) appear to be write-only. The NS 8390 data sheet lists |
| 959 | * them as r/w so this is a bug. The SMC 83C790 (SMC Ultra and |
| 960 | * Ultra32 EISA) appears to have this bug fixed. |
| 961 | */ |
| 962 | |
| 963 | if (netif_running(dev)) |
| 964 | ei_outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR); |
| 965 | ei_outb_p(E8390_NODMA + E8390_PAGE1, e8390_base + E8390_CMD); |
| 966 | for(i = 0; i < 8; i++) |
| 967 | { |
| 968 | ei_outb_p(ei_local->mcfilter[i], e8390_base + EN1_MULT_SHIFT(i)); |
| 969 | #ifndef BUG_83C690 |
| 970 | if(ei_inb_p(e8390_base + EN1_MULT_SHIFT(i))!=ei_local->mcfilter[i]) |
| 971 | printk(KERN_ERR "Multicast filter read/write mismap %d\n",i); |
| 972 | #endif |
| 973 | } |
| 974 | ei_outb_p(E8390_NODMA + E8390_PAGE0, e8390_base + E8390_CMD); |
| 975 | |
| 976 | if(dev->flags&IFF_PROMISC) |
| 977 | ei_outb_p(E8390_RXCONFIG | 0x18, e8390_base + EN0_RXCR); |
| 978 | else if(dev->flags&IFF_ALLMULTI || dev->mc_list) |
| 979 | ei_outb_p(E8390_RXCONFIG | 0x08, e8390_base + EN0_RXCR); |
| 980 | else |
| 981 | ei_outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR); |
| 982 | } |
| 983 | |
| 984 | /* |
| 985 | * Called without lock held. This is invoked from user context and may |
| 986 | * be parallel to just about everything else. Its also fairly quick and |
| 987 | * not called too often. Must protect against both bh and irq users |
| 988 | */ |
| 989 | |
| 990 | static void __ei_set_multicast_list(struct net_device *dev) |
| 991 | { |
| 992 | unsigned long flags; |
| 993 | struct ei_device *ei_local = (struct ei_device*)netdev_priv(dev); |
| 994 | |
| 995 | spin_lock_irqsave(&ei_local->page_lock, flags); |
| 996 | do_set_multicast_list(dev); |
| 997 | spin_unlock_irqrestore(&ei_local->page_lock, flags); |
| 998 | } |
| 999 | |
| 1000 | /** |
| 1001 | * ethdev_setup - init rest of 8390 device struct |
| 1002 | * @dev: network device structure to init |
| 1003 | * |
| 1004 | * Initialize the rest of the 8390 device structure. Do NOT __init |
| 1005 | * this, as it is used by 8390 based modular drivers too. |
| 1006 | */ |
| 1007 | |
| 1008 | static void ethdev_setup(struct net_device *dev) |
| 1009 | { |
| 1010 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); |
| 1011 | if (ei_debug > 1) |
| 1012 | printk(version); |
| 1013 | |
| 1014 | ether_setup(dev); |
| 1015 | |
| 1016 | spin_lock_init(&ei_local->page_lock); |
| 1017 | } |
| 1018 | |
| 1019 | /** |
| 1020 | * alloc_ei_netdev - alloc_etherdev counterpart for 8390 |
| 1021 | * @size: extra bytes to allocate |
| 1022 | * |
| 1023 | * Allocate 8390-specific net_device. |
| 1024 | */ |
| 1025 | static struct net_device *____alloc_ei_netdev(int size) |
| 1026 | { |
| 1027 | return alloc_netdev(sizeof(struct ei_device) + size, "eth%d", |
| 1028 | ethdev_setup); |
| 1029 | } |
| 1030 | |
| 1031 | |
| 1032 | |
| 1033 | |
| 1034 | /* This page of functions should be 8390 generic */ |
| 1035 | /* Follow National Semi's recommendations for initializing the "NIC". */ |
| 1036 | |
| 1037 | /** |
| 1038 | * NS8390_init - initialize 8390 hardware |
| 1039 | * @dev: network device to initialize |
| 1040 | * @startp: boolean. non-zero value to initiate chip processing |
| 1041 | * |
| 1042 | * Must be called with lock held. |
| 1043 | */ |
| 1044 | |
| 1045 | static void __NS8390_init(struct net_device *dev, int startp) |
| 1046 | { |
| 1047 | unsigned long e8390_base = dev->base_addr; |
| 1048 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); |
| 1049 | int i; |
| 1050 | int endcfg = ei_local->word16 |
| 1051 | ? (0x48 | ENDCFG_WTS | (ei_local->bigendian ? ENDCFG_BOS : 0)) |
| 1052 | : 0x48; |
| 1053 | |
| 1054 | if(sizeof(struct e8390_pkt_hdr)!=4) |
| 1055 | panic("8390.c: header struct mispacked\n"); |
| 1056 | /* Follow National Semi's recommendations for initing the DP83902. */ |
| 1057 | ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); /* 0x21 */ |
| 1058 | ei_outb_p(endcfg, e8390_base + EN0_DCFG); /* 0x48 or 0x49 */ |
| 1059 | /* Clear the remote byte count registers. */ |
| 1060 | ei_outb_p(0x00, e8390_base + EN0_RCNTLO); |
| 1061 | ei_outb_p(0x00, e8390_base + EN0_RCNTHI); |
| 1062 | /* Set to monitor and loopback mode -- this is vital!. */ |
| 1063 | ei_outb_p(E8390_RXOFF, e8390_base + EN0_RXCR); /* 0x20 */ |
| 1064 | ei_outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); /* 0x02 */ |
| 1065 | /* Set the transmit page and receive ring. */ |
| 1066 | ei_outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR); |
| 1067 | ei_local->tx1 = ei_local->tx2 = 0; |
| 1068 | ei_outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG); |
| 1069 | ei_outb_p(ei_local->stop_page-1, e8390_base + EN0_BOUNDARY); /* 3c503 says 0x3f,NS0x26*/ |
| 1070 | ei_local->current_page = ei_local->rx_start_page; /* assert boundary+1 */ |
| 1071 | ei_outb_p(ei_local->stop_page, e8390_base + EN0_STOPPG); |
| 1072 | /* Clear the pending interrupts and mask. */ |
| 1073 | ei_outb_p(0xFF, e8390_base + EN0_ISR); |
| 1074 | ei_outb_p(0x00, e8390_base + EN0_IMR); |
| 1075 | |
| 1076 | /* Copy the station address into the DS8390 registers. */ |
| 1077 | |
| 1078 | ei_outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base+E8390_CMD); /* 0x61 */ |
| 1079 | for(i = 0; i < 6; i++) |
| 1080 | { |
| 1081 | ei_outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS_SHIFT(i)); |
| 1082 | if (ei_debug > 1 && ei_inb_p(e8390_base + EN1_PHYS_SHIFT(i))!=dev->dev_addr[i]) |
| 1083 | printk(KERN_ERR "Hw. address read/write mismap %d\n",i); |
| 1084 | } |
| 1085 | |
| 1086 | ei_outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG); |
| 1087 | ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); |
| 1088 | |
| 1089 | netif_start_queue(dev); |
| 1090 | ei_local->tx1 = ei_local->tx2 = 0; |
| 1091 | ei_local->txing = 0; |
| 1092 | |
| 1093 | if (startp) |
| 1094 | { |
| 1095 | ei_outb_p(0xff, e8390_base + EN0_ISR); |
| 1096 | ei_outb_p(ENISR_ALL, e8390_base + EN0_IMR); |
| 1097 | ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD); |
| 1098 | ei_outb_p(E8390_TXCONFIG, e8390_base + EN0_TXCR); /* xmit on. */ |
| 1099 | /* 3c503 TechMan says rxconfig only after the NIC is started. */ |
| 1100 | ei_outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR); /* rx on, */ |
| 1101 | do_set_multicast_list(dev); /* (re)load the mcast table */ |
| 1102 | } |
| 1103 | } |
| 1104 | |
| 1105 | /* Trigger a transmit start, assuming the length is valid. |
| 1106 | Always called with the page lock held */ |
| 1107 | |
| 1108 | static void NS8390_trigger_send(struct net_device *dev, unsigned int length, |
| 1109 | int start_page) |
| 1110 | { |
| 1111 | unsigned long e8390_base = dev->base_addr; |
| 1112 | struct ei_device *ei_local __attribute((unused)) = (struct ei_device *) netdev_priv(dev); |
| 1113 | |
| 1114 | ei_outb_p(E8390_NODMA+E8390_PAGE0, e8390_base+E8390_CMD); |
| 1115 | |
| 1116 | if (ei_inb_p(e8390_base + E8390_CMD) & E8390_TRANS) |
| 1117 | { |
| 1118 | printk(KERN_WARNING "%s: trigger_send() called with the transmitter busy.\n", |
| 1119 | dev->name); |
| 1120 | return; |
| 1121 | } |
| 1122 | ei_outb_p(length & 0xff, e8390_base + EN0_TCNTLO); |
| 1123 | ei_outb_p(length >> 8, e8390_base + EN0_TCNTHI); |
| 1124 | ei_outb_p(start_page, e8390_base + EN0_TPSR); |
| 1125 | ei_outb_p(E8390_NODMA+E8390_TRANS+E8390_START, e8390_base+E8390_CMD); |
| 1126 | } |