?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
ibm_emac: improved PHY support
[linux-2.6.git] / drivers / net / rrunner.c
blob25c73d47daad9c29c0bb52e5c9035efbd9818909
1 /*
2 * rrunner.c: Linux driver for the Essential RoadRunner HIPPI board.
3 *
4 * Copyright (C) 1998-2002 by Jes Sorensen, <jes@wildopensource.com>.
5 *
6 * Thanks to Essential Communication for providing us with hardware
7 * and very comprehensive documentation without which I would not have
8 * been able to write this driver. A special thank you to John Gibbon
9 * for sorting out the legal issues, with the NDA, allowing the code to
10 * be released under the GPL.
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * Thanks to Jayaram Bhat from ODS/Essential for fixing some of the
18 * stupid bugs in my code.
19 *
20 * Softnet support and various other patches from Val Henson of
21 * ODS/Essential.
22 *
23 * PCI DMA mapping code partly based on work by Francois Romieu.
24 */
25
26
27 #define DEBUG 1
28 #define RX_DMA_SKBUFF 1
29 #define PKT_COPY_THRESHOLD 512
30
31 #include <linux/module.h>
32 #include <linux/types.h>
33 #include <linux/errno.h>
34 #include <linux/ioport.h>
35 #include <linux/pci.h>
36 #include <linux/kernel.h>
37 #include <linux/netdevice.h>
38 #include <linux/hippidevice.h>
39 #include <linux/skbuff.h>
40 #include <linux/init.h>
41 #include <linux/delay.h>
42 #include <linux/mm.h>
43 #include <net/sock.h>
44
45 #include <asm/system.h>
46 #include <asm/cache.h>
47 #include <asm/byteorder.h>
48 #include <asm/io.h>
49 #include <asm/irq.h>
50 #include <asm/uaccess.h>
51
52 #define rr_if_busy(dev) netif_queue_stopped(dev)
53 #define rr_if_running(dev) netif_running(dev)
54
55 #include "rrunner.h"
56
57 #define RUN_AT(x) (jiffies + (x))
58
59
60 MODULE_AUTHOR("Jes Sorensen <jes@wildopensource.com>");
61 MODULE_DESCRIPTION("Essential RoadRunner HIPPI driver");
62 MODULE_LICENSE("GPL");
63
64 static char version[] __devinitdata = "rrunner.c: v0.50 11/11/2002 Jes Sorensen (jes@wildopensource.com)\n";
65
66 /*
67 * Implementation notes:
68 *
69 * The DMA engine only allows for DMA within physical 64KB chunks of
70 * memory. The current approach of the driver (and stack) is to use
71 * linear blocks of memory for the skbuffs. However, as the data block
72 * is always the first part of the skb and skbs are 2^n aligned so we
73 * are guarantted to get the whole block within one 64KB align 64KB
74 * chunk.
75 *
76 * On the long term, relying on being able to allocate 64KB linear
77 * chunks of memory is not feasible and the skb handling code and the
78 * stack will need to know about I/O vectors or something similar.
79 */
80
81 /*
82 * These are checked at init time to see if they are at least 256KB
83 * and increased to 256KB if they are not. This is done to avoid ending
84 * up with socket buffers smaller than the MTU size,
85 */
86 extern __u32 sysctl_wmem_max;
87 extern __u32 sysctl_rmem_max;
88
89 static int __devinit rr_init_one(struct pci_dev *pdev,
90 const struct pci_device_id *ent)
91 {
92 struct net_device *dev;
93 static int version_disp;
94 u8 pci_latency;
95 struct rr_private *rrpriv;
96 void *tmpptr;
97 dma_addr_t ring_dma;
98 int ret = -ENOMEM;
99
100 dev = alloc_hippi_dev(sizeof(struct rr_private));
101 if (!dev)
102 goto out3;
103
104 ret = pci_enable_device(pdev);
105 if (ret) {
106 ret = -ENODEV;
107 goto out2;
108 }
109
110 rrpriv = netdev_priv(dev);
111
112 SET_MODULE_OWNER(dev);
113 SET_NETDEV_DEV(dev, &pdev->dev);
114
115 if (pci_request_regions(pdev, "rrunner")) {
116 ret = -EIO;
117 goto out;
118 }
119
120 pci_set_drvdata(pdev, dev);
121
122 rrpriv->pci_dev = pdev;
123
124 spin_lock_init(&rrpriv->lock);
125
126 dev->irq = pdev->irq;
127 dev->open = &rr_open;
128 dev->hard_start_xmit = &rr_start_xmit;
129 dev->stop = &rr_close;
130 dev->get_stats = &rr_get_stats;
131 dev->do_ioctl = &rr_ioctl;
132
133 dev->base_addr = pci_resource_start(pdev, 0);
134
135 /* display version info if adapter is found */
136 if (!version_disp) {
137 /* set display flag to TRUE so that */
138 /* we only display this string ONCE */
139 version_disp = 1;
140 printk(version);
141 }
142
143 pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &pci_latency);
144 if (pci_latency <= 0x58){
145 pci_latency = 0x58;
146 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, pci_latency);
147 }
148
149 pci_set_master(pdev);
150
151 printk(KERN_INFO "%s: Essential RoadRunner serial HIPPI "
152 "at 0x%08lx, irq %i, PCI latency %i\n", dev->name,
153 dev->base_addr, dev->irq, pci_latency);
154
155 /*
156 * Remap the regs into kernel space.
157 */
158
159 rrpriv->regs = ioremap(dev->base_addr, 0x1000);
160
161 if (!rrpriv->regs){
162 printk(KERN_ERR "%s: Unable to map I/O register, "
163 "RoadRunner will be disabled.\n", dev->name);
164 ret = -EIO;
165 goto out;
166 }
167
168 tmpptr = pci_alloc_consistent(pdev, TX_TOTAL_SIZE, &ring_dma);
169 rrpriv->tx_ring = tmpptr;
170 rrpriv->tx_ring_dma = ring_dma;
171
172 if (!tmpptr) {
173 ret = -ENOMEM;
174 goto out;
175 }
176
177 tmpptr = pci_alloc_consistent(pdev, RX_TOTAL_SIZE, &ring_dma);
178 rrpriv->rx_ring = tmpptr;
179 rrpriv->rx_ring_dma = ring_dma;
180
181 if (!tmpptr) {
182 ret = -ENOMEM;
183 goto out;
184 }
185
186 tmpptr = pci_alloc_consistent(pdev, EVT_RING_SIZE, &ring_dma);
187 rrpriv->evt_ring = tmpptr;
188 rrpriv->evt_ring_dma = ring_dma;
189
190 if (!tmpptr) {
191 ret = -ENOMEM;
192 goto out;
193 }
194
195 /*
196 * Don't access any register before this point!
197 */
198 #ifdef __BIG_ENDIAN
199 writel(readl(&rrpriv->regs->HostCtrl) | NO_SWAP,
200 &rrpriv->regs->HostCtrl);
201 #endif
202 /*
203 * Need to add a case for little-endian 64-bit hosts here.
204 */
205
206 rr_init(dev);
207
208 dev->base_addr = 0;
209
210 ret = register_netdev(dev);
211 if (ret)
212 goto out;
213 return 0;
214
215 out:
216 if (rrpriv->rx_ring)
217 pci_free_consistent(pdev, RX_TOTAL_SIZE, rrpriv->rx_ring,
218 rrpriv->rx_ring_dma);
219 if (rrpriv->tx_ring)
220 pci_free_consistent(pdev, TX_TOTAL_SIZE, rrpriv->tx_ring,
221 rrpriv->tx_ring_dma);
222 if (rrpriv->regs)
223 iounmap(rrpriv->regs);
224 if (pdev) {
225 pci_release_regions(pdev);
226 pci_set_drvdata(pdev, NULL);
227 }
228 out2:
229 free_netdev(dev);
230 out3:
231 return ret;
232 }
233
234 static void __devexit rr_remove_one (struct pci_dev *pdev)
235 {
236 struct net_device *dev = pci_get_drvdata(pdev);
237
238 if (dev) {
239 struct rr_private *rr = netdev_priv(dev);
240
241 if (!(readl(&rr->regs->HostCtrl) & NIC_HALTED)){
242 printk(KERN_ERR "%s: trying to unload running NIC\n",
243 dev->name);
244 writel(HALT_NIC, &rr->regs->HostCtrl);
245 }
246
247 pci_free_consistent(pdev, EVT_RING_SIZE, rr->evt_ring,
248 rr->evt_ring_dma);
249 pci_free_consistent(pdev, RX_TOTAL_SIZE, rr->rx_ring,
250 rr->rx_ring_dma);
251 pci_free_consistent(pdev, TX_TOTAL_SIZE, rr->tx_ring,
252 rr->tx_ring_dma);
253 unregister_netdev(dev);
254 iounmap(rr->regs);
255 free_netdev(dev);
256 pci_release_regions(pdev);
257 pci_disable_device(pdev);
258 pci_set_drvdata(pdev, NULL);
259 }
260 }
261
262
263 /*
264 * Commands are considered to be slow, thus there is no reason to
265 * inline this.
266 */
267 static void rr_issue_cmd(struct rr_private *rrpriv, struct cmd *cmd)
268 {
269 struct rr_regs __iomem *regs;
270 u32 idx;
271
272 regs = rrpriv->regs;
273 /*
274 * This is temporary - it will go away in the final version.
275 * We probably also want to make this function inline.
276 */
277 if (readl(&regs->HostCtrl) & NIC_HALTED){
278 printk("issuing command for halted NIC, code 0x%x, "
279 "HostCtrl %08x\n", cmd->code, readl(&regs->HostCtrl));
280 if (readl(&regs->Mode) & FATAL_ERR)
281 printk("error codes Fail1 %02x, Fail2 %02x\n",
282 readl(&regs->Fail1), readl(&regs->Fail2));
283 }
284
285 idx = rrpriv->info->cmd_ctrl.pi;
286
287 writel(*(u32*)(cmd), &regs->CmdRing[idx]);
288 wmb();
289
290 idx = (idx - 1) % CMD_RING_ENTRIES;
291 rrpriv->info->cmd_ctrl.pi = idx;
292 wmb();
293
294 if (readl(&regs->Mode) & FATAL_ERR)
295 printk("error code %02x\n", readl(&regs->Fail1));
296 }
297
298
299 /*
300 * Reset the board in a sensible manner. The NIC is already halted
301 * when we get here and a spin-lock is held.
302 */
303 static int rr_reset(struct net_device *dev)
304 {
305 struct rr_private *rrpriv;
306 struct rr_regs __iomem *regs;
307 struct eeprom *hw = NULL;
308 u32 start_pc;
309 int i;
310
311 rrpriv = netdev_priv(dev);
312 regs = rrpriv->regs;
313
314 rr_load_firmware(dev);
315
316 writel(0x01000000, &regs->TX_state);
317 writel(0xff800000, &regs->RX_state);
318 writel(0, &regs->AssistState);
319 writel(CLEAR_INTA, &regs->LocalCtrl);
320 writel(0x01, &regs->BrkPt);
321 writel(0, &regs->Timer);
322 writel(0, &regs->TimerRef);
323 writel(RESET_DMA, &regs->DmaReadState);
324 writel(RESET_DMA, &regs->DmaWriteState);
325 writel(0, &regs->DmaWriteHostHi);
326 writel(0, &regs->DmaWriteHostLo);
327 writel(0, &regs->DmaReadHostHi);
328 writel(0, &regs->DmaReadHostLo);
329 writel(0, &regs->DmaReadLen);
330 writel(0, &regs->DmaWriteLen);
331 writel(0, &regs->DmaWriteLcl);
332 writel(0, &regs->DmaWriteIPchecksum);
333 writel(0, &regs->DmaReadLcl);
334 writel(0, &regs->DmaReadIPchecksum);
335 writel(0, &regs->PciState);
336 #if (BITS_PER_LONG == 64) && defined __LITTLE_ENDIAN
337 writel(SWAP_DATA | PTR64BIT | PTR_WD_SWAP, &regs->Mode);
338 #elif (BITS_PER_LONG == 64)
339 writel(SWAP_DATA | PTR64BIT | PTR_WD_NOSWAP, &regs->Mode);
340 #else
341 writel(SWAP_DATA | PTR32BIT | PTR_WD_NOSWAP, &regs->Mode);
342 #endif
343
344 #if 0
345 /*
346 * Don't worry, this is just black magic.
347 */
348 writel(0xdf000, &regs->RxBase);
349 writel(0xdf000, &regs->RxPrd);
350 writel(0xdf000, &regs->RxCon);
351 writel(0xce000, &regs->TxBase);
352 writel(0xce000, &regs->TxPrd);
353 writel(0xce000, &regs->TxCon);
354 writel(0, &regs->RxIndPro);
355 writel(0, &regs->RxIndCon);
356 writel(0, &regs->RxIndRef);
357 writel(0, &regs->TxIndPro);
358 writel(0, &regs->TxIndCon);
359 writel(0, &regs->TxIndRef);
360 writel(0xcc000, &regs->pad10[0]);
361 writel(0, &regs->DrCmndPro);
362 writel(0, &regs->DrCmndCon);
363 writel(0, &regs->DwCmndPro);
364 writel(0, &regs->DwCmndCon);
365 writel(0, &regs->DwCmndRef);
366 writel(0, &regs->DrDataPro);
367 writel(0, &regs->DrDataCon);
368 writel(0, &regs->DrDataRef);
369 writel(0, &regs->DwDataPro);
370 writel(0, &regs->DwDataCon);
371 writel(0, &regs->DwDataRef);
372 #endif
373
374 writel(0xffffffff, &regs->MbEvent);
375 writel(0, &regs->Event);
376
377 writel(0, &regs->TxPi);
378 writel(0, &regs->IpRxPi);
379
380 writel(0, &regs->EvtCon);
381 writel(0, &regs->EvtPrd);
382
383 rrpriv->info->evt_ctrl.pi = 0;
384
385 for (i = 0; i < CMD_RING_ENTRIES; i++)
386 writel(0, &regs->CmdRing[i]);
387
388 /*
389 * Why 32 ? is this not cache line size dependent?
390 */
391 writel(RBURST_64|WBURST_64, &regs->PciState);
392 wmb();
393
394 start_pc = rr_read_eeprom_word(rrpriv, &hw->rncd_info.FwStart);
395
396 #if (DEBUG > 1)
397 printk("%s: Executing firmware at address 0x%06x\n",
398 dev->name, start_pc);
399 #endif
400
401 writel(start_pc + 0x800, &regs->Pc);
402 wmb();
403 udelay(5);
404
405 writel(start_pc, &regs->Pc);
406 wmb();
407
408 return 0;
409 }
410
411
412 /*
413 * Read a string from the EEPROM.
414 */
415 static unsigned int rr_read_eeprom(struct rr_private *rrpriv,
416 unsigned long offset,
417 unsigned char *buf,
418 unsigned long length)
419 {
420 struct rr_regs __iomem *regs = rrpriv->regs;
421 u32 misc, io, host, i;
422
423 io = readl(&regs->ExtIo);
424 writel(0, &regs->ExtIo);
425 misc = readl(&regs->LocalCtrl);
426 writel(0, &regs->LocalCtrl);
427 host = readl(&regs->HostCtrl);
428 writel(host | HALT_NIC, &regs->HostCtrl);
429 mb();
430
431 for (i = 0; i < length; i++){
432 writel((EEPROM_BASE + ((offset+i) << 3)), &regs->WinBase);
433 mb();
434 buf[i] = (readl(&regs->WinData) >> 24) & 0xff;
435 mb();
436 }
437
438 writel(host, &regs->HostCtrl);
439 writel(misc, &regs->LocalCtrl);
440 writel(io, &regs->ExtIo);
441 mb();
442 return i;
443 }
444
445
446 /*
447 * Shortcut to read one word (4 bytes) out of the EEPROM and convert
448 * it to our CPU byte-order.
449 */
450 static u32 rr_read_eeprom_word(struct rr_private *rrpriv,
451 void * offset)
452 {
453 u32 word;
454
455 if ((rr_read_eeprom(rrpriv, (unsigned long)offset,
456 (char *)&word, 4) == 4))
457 return be32_to_cpu(word);
458 return 0;
459 }
460
461
462 /*
463 * Write a string to the EEPROM.
464 *
465 * This is only called when the firmware is not running.
466 */
467 static unsigned int write_eeprom(struct rr_private *rrpriv,
468 unsigned long offset,
469 unsigned char *buf,
470 unsigned long length)
471 {
472 struct rr_regs __iomem *regs = rrpriv->regs;
473 u32 misc, io, data, i, j, ready, error = 0;
474
475 io = readl(&regs->ExtIo);
476 writel(0, &regs->ExtIo);
477 misc = readl(&regs->LocalCtrl);
478 writel(ENABLE_EEPROM_WRITE, &regs->LocalCtrl);
479 mb();
480
481 for (i = 0; i < length; i++){
482 writel((EEPROM_BASE + ((offset+i) << 3)), &regs->WinBase);
483 mb();
484 data = buf[i] << 24;
485 /*
486 * Only try to write the data if it is not the same
487 * value already.
488 */
489 if ((readl(&regs->WinData) & 0xff000000) != data){
490 writel(data, &regs->WinData);
491 ready = 0;
492 j = 0;
493 mb();
494 while(!ready){
495 udelay(20);
496 if ((readl(&regs->WinData) & 0xff000000) ==
497 data)
498 ready = 1;
499 mb();
500 if (j++ > 5000){
501 printk("data mismatch: %08x, "
502 "WinData %08x\n", data,
503 readl(&regs->WinData));
504 ready = 1;
505 error = 1;
506 }
507 }
508 }
509 }
510
511 writel(misc, &regs->LocalCtrl);
512 writel(io, &regs->ExtIo);
513 mb();
514
515 return error;
516 }
517
518
519 static int __init rr_init(struct net_device *dev)
520 {
521 struct rr_private *rrpriv;
522 struct rr_regs __iomem *regs;
523 struct eeprom *hw = NULL;
524 u32 sram_size, rev;
525 int i;
526
527 rrpriv = netdev_priv(dev);
528 regs = rrpriv->regs;
529
530 rev = readl(&regs->FwRev);
531 rrpriv->fw_rev = rev;
532 if (rev > 0x00020024)
533 printk(" Firmware revision: %i.%i.%i\n", (rev >> 16),
534 ((rev >> 8) & 0xff), (rev & 0xff));
535 else if (rev >= 0x00020000) {
536 printk(" Firmware revision: %i.%i.%i (2.0.37 or "
537 "later is recommended)\n", (rev >> 16),
538 ((rev >> 8) & 0xff), (rev & 0xff));
539 }else{
540 printk(" Firmware revision too old: %i.%i.%i, please "
541 "upgrade to 2.0.37 or later.\n",
542 (rev >> 16), ((rev >> 8) & 0xff), (rev & 0xff));
543 }
544
545 #if (DEBUG > 2)
546 printk(" Maximum receive rings %i\n", readl(&regs->MaxRxRng));
547 #endif
548
549 /*
550 * Read the hardware address from the eeprom. The HW address
551 * is not really necessary for HIPPI but awfully convenient.
552 * The pointer arithmetic to put it in dev_addr is ugly, but
553 * Donald Becker does it this way for the GigE version of this
554 * card and it's shorter and more portable than any
555 * other method I've seen. -VAL
556 */
557
558 *(u16 *)(dev->dev_addr) =
559 htons(rr_read_eeprom_word(rrpriv, &hw->manf.BoardULA));
560 *(u32 *)(dev->dev_addr+2) =
561 htonl(rr_read_eeprom_word(rrpriv, &hw->manf.BoardULA[4]));
562
563 printk(" MAC: ");
564
565 for (i = 0; i < 5; i++)
566 printk("%2.2x:", dev->dev_addr[i]);
567 printk("%2.2x\n", dev->dev_addr[i]);
568
569 sram_size = rr_read_eeprom_word(rrpriv, (void *)8);
570 printk(" SRAM size 0x%06x\n", sram_size);
571
572 if (sysctl_rmem_max < 262144){
573 printk(" Receive socket buffer limit too low (%i), "
574 "setting to 262144\n", sysctl_rmem_max);
575 sysctl_rmem_max = 262144;
576 }
577
578 if (sysctl_wmem_max < 262144){
579 printk(" Transmit socket buffer limit too low (%i), "
580 "setting to 262144\n", sysctl_wmem_max);
581 sysctl_wmem_max = 262144;
582 }
583
584 return 0;
585 }
586
587
588 static int rr_init1(struct net_device *dev)
589 {
590 struct rr_private *rrpriv;
591 struct rr_regs __iomem *regs;
592 unsigned long myjif, flags;
593 struct cmd cmd;
594 u32 hostctrl;
595 int ecode = 0;
596 short i;
597
598 rrpriv = netdev_priv(dev);
599 regs = rrpriv->regs;
600
601 spin_lock_irqsave(&rrpriv->lock, flags);
602
603 hostctrl = readl(&regs->HostCtrl);
604 writel(hostctrl | HALT_NIC | RR_CLEAR_INT, &regs->HostCtrl);
605 wmb();
606
607 if (hostctrl & PARITY_ERR){
608 printk("%s: Parity error halting NIC - this is serious!\n",
609 dev->name);
610 spin_unlock_irqrestore(&rrpriv->lock, flags);
611 ecode = -EFAULT;
612 goto error;
613 }
614
615 set_rxaddr(regs, rrpriv->rx_ctrl_dma);
616 set_infoaddr(regs, rrpriv->info_dma);
617
618 rrpriv->info->evt_ctrl.entry_size = sizeof(struct event);
619 rrpriv->info->evt_ctrl.entries = EVT_RING_ENTRIES;
620 rrpriv->info->evt_ctrl.mode = 0;
621 rrpriv->info->evt_ctrl.pi = 0;
622 set_rraddr(&rrpriv->info->evt_ctrl.rngptr, rrpriv->evt_ring_dma);
623
624 rrpriv->info->cmd_ctrl.entry_size = sizeof(struct cmd);
625 rrpriv->info->cmd_ctrl.entries = CMD_RING_ENTRIES;
626 rrpriv->info->cmd_ctrl.mode = 0;
627 rrpriv->info->cmd_ctrl.pi = 15;
628
629 for (i = 0; i < CMD_RING_ENTRIES; i++) {
630 writel(0, &regs->CmdRing[i]);
631 }
632
633 for (i = 0; i < TX_RING_ENTRIES; i++) {
634 rrpriv->tx_ring[i].size = 0;
635 set_rraddr(&rrpriv->tx_ring[i].addr, 0);
636 rrpriv->tx_skbuff[i] = NULL;
637 }
638 rrpriv->info->tx_ctrl.entry_size = sizeof(struct tx_desc);
639 rrpriv->info->tx_ctrl.entries = TX_RING_ENTRIES;
640 rrpriv->info->tx_ctrl.mode = 0;
641 rrpriv->info->tx_ctrl.pi = 0;
642 set_rraddr(&rrpriv->info->tx_ctrl.rngptr, rrpriv->tx_ring_dma);
643
644 /*
645 * Set dirty_tx before we start receiving interrupts, otherwise
646 * the interrupt handler might think it is supposed to process
647 * tx ints before we are up and running, which may cause a null
648 * pointer access in the int handler.
649 */
650 rrpriv->tx_full = 0;
651 rrpriv->cur_rx = 0;
652 rrpriv->dirty_rx = rrpriv->dirty_tx = 0;
653
654 rr_reset(dev);
655
656 /* Tuning values */
657 writel(0x5000, &regs->ConRetry);
658 writel(0x100, &regs->ConRetryTmr);
659 writel(0x500000, &regs->ConTmout);
660 writel(0x60, &regs->IntrTmr);
661 writel(0x500000, &regs->TxDataMvTimeout);
662 writel(0x200000, &regs->RxDataMvTimeout);
663 writel(0x80, &regs->WriteDmaThresh);
664 writel(0x80, &regs->ReadDmaThresh);
665
666 rrpriv->fw_running = 0;
667 wmb();
668
669 hostctrl &= ~(HALT_NIC | INVALID_INST_B | PARITY_ERR);
670 writel(hostctrl, &regs->HostCtrl);
671 wmb();
672
673 spin_unlock_irqrestore(&rrpriv->lock, flags);
674
675 for (i = 0; i < RX_RING_ENTRIES; i++) {
676 struct sk_buff *skb;
677 dma_addr_t addr;
678
679 rrpriv->rx_ring[i].mode = 0;
680 skb = alloc_skb(dev->mtu + HIPPI_HLEN, GFP_ATOMIC);
681 if (!skb) {
682 printk(KERN_WARNING "%s: Unable to allocate memory "
683 "for receive ring - halting NIC\n", dev->name);
684 ecode = -ENOMEM;
685 goto error;
686 }
687 rrpriv->rx_skbuff[i] = skb;
688 addr = pci_map_single(rrpriv->pci_dev, skb->data,
689 dev->mtu + HIPPI_HLEN, PCI_DMA_FROMDEVICE);
690 /*
691 * Sanity test to see if we conflict with the DMA
692 * limitations of the Roadrunner.
693 */
694 if ((((unsigned long)skb->data) & 0xfff) > ~65320)
695 printk("skb alloc error\n");
696
697 set_rraddr(&rrpriv->rx_ring[i].addr, addr);
698 rrpriv->rx_ring[i].size = dev->mtu + HIPPI_HLEN;
699 }
700
701 rrpriv->rx_ctrl[4].entry_size = sizeof(struct rx_desc);
702 rrpriv->rx_ctrl[4].entries = RX_RING_ENTRIES;
703 rrpriv->rx_ctrl[4].mode = 8;
704 rrpriv->rx_ctrl[4].pi = 0;
705 wmb();
706 set_rraddr(&rrpriv->rx_ctrl[4].rngptr, rrpriv->rx_ring_dma);
707
708 udelay(1000);
709
710 /*
711 * Now start the FirmWare.
712 */
713 cmd.code = C_START_FW;
714 cmd.ring = 0;
715 cmd.index = 0;
716
717 rr_issue_cmd(rrpriv, &cmd);
718
719 /*
720 * Give the FirmWare time to chew on the `get running' command.
721 */
722 myjif = jiffies + 5 * HZ;
723 while (time_before(jiffies, myjif) && !rrpriv->fw_running)
724 cpu_relax();
725
726 netif_start_queue(dev);
727
728 return ecode;
729
730 error:
731 /*
732 * We might have gotten here because we are out of memory,
733 * make sure we release everything we allocated before failing
734 */
735 for (i = 0; i < RX_RING_ENTRIES; i++) {
736 struct sk_buff *skb = rrpriv->rx_skbuff[i];
737
738 if (skb) {
739 pci_unmap_single(rrpriv->pci_dev,
740 rrpriv->rx_ring[i].addr.addrlo,
741 dev->mtu + HIPPI_HLEN,
742 PCI_DMA_FROMDEVICE);
743 rrpriv->rx_ring[i].size = 0;
744 set_rraddr(&rrpriv->rx_ring[i].addr, 0);
745 dev_kfree_skb(skb);
746 rrpriv->rx_skbuff[i] = NULL;
747 }
748 }
749 return ecode;
750 }
751
752
753 /*
754 * All events are considered to be slow (RX/TX ints do not generate
755 * events) and are handled here, outside the main interrupt handler,
756 * to reduce the size of the handler.
757 */
758 static u32 rr_handle_event(struct net_device *dev, u32 prodidx, u32 eidx)
759 {
760 struct rr_private *rrpriv;
761 struct rr_regs __iomem *regs;
762 u32 tmp;
763
764 rrpriv = netdev_priv(dev);
765 regs = rrpriv->regs;
766
767 while (prodidx != eidx){
768 switch (rrpriv->evt_ring[eidx].code){
769 case E_NIC_UP:
770 tmp = readl(&regs->FwRev);
771 printk(KERN_INFO "%s: Firmware revision %i.%i.%i "
772 "up and running\n", dev->name,
773 (tmp >> 16), ((tmp >> 8) & 0xff), (tmp & 0xff));
774 rrpriv->fw_running = 1;
775 writel(RX_RING_ENTRIES - 1, &regs->IpRxPi);
776 wmb();
777 break;
778 case E_LINK_ON:
779 printk(KERN_INFO "%s: Optical link ON\n", dev->name);
780 break;
781 case E_LINK_OFF:
782 printk(KERN_INFO "%s: Optical link OFF\n", dev->name);
783 break;
784 case E_RX_IDLE:
785 printk(KERN_WARNING "%s: RX data not moving\n",
786 dev->name);
787 goto drop;
788 case E_WATCHDOG:
789 printk(KERN_INFO "%s: The watchdog is here to see "
790 "us\n", dev->name);
791 break;
792 case E_INTERN_ERR:
793 printk(KERN_ERR "%s: HIPPI Internal NIC error\n",
794 dev->name);
795 writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
796 &regs->HostCtrl);
797 wmb();
798 break;
799 case E_HOST_ERR:
800 printk(KERN_ERR "%s: Host software error\n",
801 dev->name);
802 writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
803 &regs->HostCtrl);
804 wmb();
805 break;
806 /*
807 * TX events.
808 */
809 case E_CON_REJ:
810 printk(KERN_WARNING "%s: Connection rejected\n",
811 dev->name);
812 rrpriv->stats.tx_aborted_errors++;
813 break;
814 case E_CON_TMOUT:
815 printk(KERN_WARNING "%s: Connection timeout\n",
816 dev->name);
817 break;
818 case E_DISC_ERR:
819 printk(KERN_WARNING "%s: HIPPI disconnect error\n",
820 dev->name);
821 rrpriv->stats.tx_aborted_errors++;
822 break;
823 case E_INT_PRTY:
824 printk(KERN_ERR "%s: HIPPI Internal Parity error\n",
825 dev->name);
826 writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
827 &regs->HostCtrl);
828 wmb();
829 break;
830 case E_TX_IDLE:
831 printk(KERN_WARNING "%s: Transmitter idle\n",
832 dev->name);
833 break;
834 case E_TX_LINK_DROP:
835 printk(KERN_WARNING "%s: Link lost during transmit\n",
836 dev->name);
837 rrpriv->stats.tx_aborted_errors++;
838 writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
839 &regs->HostCtrl);
840 wmb();
841 break;
842 case E_TX_INV_RNG:
843 printk(KERN_ERR "%s: Invalid send ring block\n",
844 dev->name);
845 writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
846 &regs->HostCtrl);
847 wmb();
848 break;
849 case E_TX_INV_BUF:
850 printk(KERN_ERR "%s: Invalid send buffer address\n",
851 dev->name);
852 writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
853 &regs->HostCtrl);
854 wmb();
855 break;
856 case E_TX_INV_DSC:
857 printk(KERN_ERR "%s: Invalid descriptor address\n",
858 dev->name);
859 writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
860 &regs->HostCtrl);
861 wmb();
862 break;
863 /*
864 * RX events.
865 */
866 case E_RX_RNG_OUT:
867 printk(KERN_INFO "%s: Receive ring full\n", dev->name);
868 break;
869
870 case E_RX_PAR_ERR:
871 printk(KERN_WARNING "%s: Receive parity error\n",
872 dev->name);
873 goto drop;
874 case E_RX_LLRC_ERR:
875 printk(KERN_WARNING "%s: Receive LLRC error\n",
876 dev->name);
877 goto drop;
878 case E_PKT_LN_ERR:
879 printk(KERN_WARNING "%s: Receive packet length "
880 "error\n", dev->name);
881 goto drop;
882 case E_DTA_CKSM_ERR:
883 printk(KERN_WARNING "%s: Data checksum error\n",
884 dev->name);
885 goto drop;
886 case E_SHT_BST:
887 printk(KERN_WARNING "%s: Unexpected short burst "
888 "error\n", dev->name);
889 goto drop;
890 case E_STATE_ERR:
891 printk(KERN_WARNING "%s: Recv. state transition"
892 " error\n", dev->name);
893 goto drop;
894 case E_UNEXP_DATA:
895 printk(KERN_WARNING "%s: Unexpected data error\n",
896 dev->name);
897 goto drop;
898 case E_LST_LNK_ERR:
899 printk(KERN_WARNING "%s: Link lost error\n",
900 dev->name);
901 goto drop;
902 case E_FRM_ERR:
903 printk(KERN_WARNING "%s: Framming Error\n",
904 dev->name);
905 goto drop;
906 case E_FLG_SYN_ERR:
907 printk(KERN_WARNING "%s: Flag sync. lost during"
908 "packet\n", dev->name);
909 goto drop;
910 case E_RX_INV_BUF:
911 printk(KERN_ERR "%s: Invalid receive buffer "
912 "address\n", dev->name);
913 writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
914 &regs->HostCtrl);
915 wmb();
916 break;
917 case E_RX_INV_DSC:
918 printk(KERN_ERR "%s: Invalid receive descriptor "
919 "address\n", dev->name);
920 writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
921 &regs->HostCtrl);
922 wmb();
923 break;
924 case E_RNG_BLK:
925 printk(KERN_ERR "%s: Invalid ring block\n",
926 dev->name);
927 writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
928 &regs->HostCtrl);
929 wmb();
930 break;
931 drop:
932 /* Label packet to be dropped.
933 * Actual dropping occurs in rx
934 * handling.
935 *
936 * The index of packet we get to drop is
937 * the index of the packet following
938 * the bad packet. -kbf
939 */
940 {
941 u16 index = rrpriv->evt_ring[eidx].index;
942 index = (index + (RX_RING_ENTRIES - 1)) %
943 RX_RING_ENTRIES;
944 rrpriv->rx_ring[index].mode |=
945 (PACKET_BAD | PACKET_END);
946 }
947 break;
948 default:
949 printk(KERN_WARNING "%s: Unhandled event 0x%02x\n",
950 dev->name, rrpriv->evt_ring[eidx].code);
951 }
952 eidx = (eidx + 1) % EVT_RING_ENTRIES;
953 }
954
955 rrpriv->info->evt_ctrl.pi = eidx;
956 wmb();
957 return eidx;
958 }
959
960
961 static void rx_int(struct net_device *dev, u32 rxlimit, u32 index)
962 {
963 struct rr_private *rrpriv = netdev_priv(dev);
964 struct rr_regs __iomem *regs = rrpriv->regs;
965
966 do {
967 struct rx_desc *desc;
968 u32 pkt_len;
969
970 desc = &(rrpriv->rx_ring[index]);
971 pkt_len = desc->size;
972 #if (DEBUG > 2)
973 printk("index %i, rxlimit %i\n", index, rxlimit);
974 printk("len %x, mode %x\n", pkt_len, desc->mode);
975 #endif
976 if ( (rrpriv->rx_ring[index].mode & PACKET_BAD) == PACKET_BAD){
977 rrpriv->stats.rx_dropped++;
978 goto defer;
979 }
980
981 if (pkt_len > 0){
982 struct sk_buff *skb, *rx_skb;
983
984 rx_skb = rrpriv->rx_skbuff[index];
985
986 if (pkt_len < PKT_COPY_THRESHOLD) {
987 skb = alloc_skb(pkt_len, GFP_ATOMIC);
988 if (skb == NULL){
989 printk(KERN_WARNING "%s: Unable to allocate skb (%i bytes), deferring packet\n", dev->name, pkt_len);
990 rrpriv->stats.rx_dropped++;
991 goto defer;
992 } else {
993 pci_dma_sync_single_for_cpu(rrpriv->pci_dev,
994 desc->addr.addrlo,
995 pkt_len,
996 PCI_DMA_FROMDEVICE);
997
998 memcpy(skb_put(skb, pkt_len),
999 rx_skb->data, pkt_len);
1000
1001 pci_dma_sync_single_for_device(rrpriv->pci_dev,
1002 desc->addr.addrlo,
1003 pkt_len,
1004 PCI_DMA_FROMDEVICE);
1005 }
1006 }else{
1007 struct sk_buff *newskb;
1008
1009 newskb = alloc_skb(dev->mtu + HIPPI_HLEN,
1010 GFP_ATOMIC);
1011 if (newskb){
1012 dma_addr_t addr;
1013
1014 pci_unmap_single(rrpriv->pci_dev,
1015 desc->addr.addrlo, dev->mtu +
1016 HIPPI_HLEN, PCI_DMA_FROMDEVICE);
1017 skb = rx_skb;
1018 skb_put(skb, pkt_len);
1019 rrpriv->rx_skbuff[index] = newskb;
1020 addr = pci_map_single(rrpriv->pci_dev,
1021 newskb->data,
1022 dev->mtu + HIPPI_HLEN,
1023 PCI_DMA_FROMDEVICE);
1024 set_rraddr(&desc->addr, addr);
1025 } else {
1026 printk("%s: Out of memory, deferring "
1027 "packet\n", dev->name);
1028 rrpriv->stats.rx_dropped++;
1029 goto defer;
1030 }
1031 }
1032 skb->protocol = hippi_type_trans(skb, dev);
1033
1034 netif_rx(skb); /* send it up */
1035
1036 dev->last_rx = jiffies;
1037 rrpriv->stats.rx_packets++;
1038 rrpriv->stats.rx_bytes += pkt_len;
1039 }
1040 defer:
1041 desc->mode = 0;
1042 desc->size = dev->mtu + HIPPI_HLEN;
1043
1044 if ((index & 7) == 7)
1045 writel(index, &regs->IpRxPi);
1046
1047 index = (index + 1) % RX_RING_ENTRIES;
1048 } while(index != rxlimit);
1049
1050 rrpriv->cur_rx = index;
1051 wmb();
1052 }
1053
1054
1055 static irqreturn_t rr_interrupt(int irq, void *dev_id)
1056 {
1057 struct rr_private *rrpriv;
1058 struct rr_regs __iomem *regs;
1059 struct net_device *dev = (struct net_device *)dev_id;
1060 u32 prodidx, rxindex, eidx, txcsmr, rxlimit, txcon;
1061
1062 rrpriv = netdev_priv(dev);
1063 regs = rrpriv->regs;
1064
1065 if (!(readl(&regs->HostCtrl) & RR_INT))
1066 return IRQ_NONE;
1067
1068 spin_lock(&rrpriv->lock);
1069
1070 prodidx = readl(&regs->EvtPrd);
1071 txcsmr = (prodidx >> 8) & 0xff;
1072 rxlimit = (prodidx >> 16) & 0xff;
1073 prodidx &= 0xff;
1074
1075 #if (DEBUG > 2)
1076 printk("%s: interrupt, prodidx = %i, eidx = %i\n", dev->name,
1077 prodidx, rrpriv->info->evt_ctrl.pi);
1078 #endif
1079 /*
1080 * Order here is important. We must handle events
1081 * before doing anything else in order to catch
1082 * such things as LLRC errors, etc -kbf
1083 */
1084
1085 eidx = rrpriv->info->evt_ctrl.pi;
1086 if (prodidx != eidx)
1087 eidx = rr_handle_event(dev, prodidx, eidx);
1088
1089 rxindex = rrpriv->cur_rx;
1090 if (rxindex != rxlimit)
1091 rx_int(dev, rxlimit, rxindex);
1092
1093 txcon = rrpriv->dirty_tx;
1094 if (txcsmr != txcon) {
1095 do {
1096 /* Due to occational firmware TX producer/consumer out
1097 * of sync. error need to check entry in ring -kbf
1098 */
1099 if(rrpriv->tx_skbuff[txcon]){
1100 struct tx_desc *desc;
1101 struct sk_buff *skb;
1102
1103 desc = &(rrpriv->tx_ring[txcon]);
1104 skb = rrpriv->tx_skbuff[txcon];
1105
1106 rrpriv->stats.tx_packets++;
1107 rrpriv->stats.tx_bytes += skb->len;
1108
1109 pci_unmap_single(rrpriv->pci_dev,
1110 desc->addr.addrlo, skb->len,
1111 PCI_DMA_TODEVICE);
1112 dev_kfree_skb_irq(skb);
1113
1114 rrpriv->tx_skbuff[txcon] = NULL;
1115 desc->size = 0;
1116 set_rraddr(&rrpriv->tx_ring[txcon].addr, 0);
1117 desc->mode = 0;
1118 }
1119 txcon = (txcon + 1) % TX_RING_ENTRIES;
1120 } while (txcsmr != txcon);
1121 wmb();
1122
1123 rrpriv->dirty_tx = txcon;
1124 if (rrpriv->tx_full && rr_if_busy(dev) &&
1125 (((rrpriv->info->tx_ctrl.pi + 1) % TX_RING_ENTRIES)
1126 != rrpriv->dirty_tx)){
1127 rrpriv->tx_full = 0;
1128 netif_wake_queue(dev);
1129 }
1130 }
1131
1132 eidx |= ((txcsmr << 8) | (rxlimit << 16));
1133 writel(eidx, &regs->EvtCon);
1134 wmb();
1135
1136 spin_unlock(&rrpriv->lock);
1137 return IRQ_HANDLED;
1138 }
1139
1140 static inline void rr_raz_tx(struct rr_private *rrpriv,
1141 struct net_device *dev)
1142 {
1143 int i;
1144
1145 for (i = 0; i < TX_RING_ENTRIES; i++) {
1146 struct sk_buff *skb = rrpriv->tx_skbuff[i];
1147
1148 if (skb) {
1149 struct tx_desc *desc = &(rrpriv->tx_ring[i]);
1150
1151 pci_unmap_single(rrpriv->pci_dev, desc->addr.addrlo,
1152 skb->len, PCI_DMA_TODEVICE);
1153 desc->size = 0;
1154 set_rraddr(&desc->addr, 0);
1155 dev_kfree_skb(skb);
1156 rrpriv->tx_skbuff[i] = NULL;
1157 }
1158 }
1159 }
1160
1161
1162 static inline void rr_raz_rx(struct rr_private *rrpriv,
1163 struct net_device *dev)
1164 {
1165 int i;
1166
1167 for (i = 0; i < RX_RING_ENTRIES; i++) {
1168 struct sk_buff *skb = rrpriv->rx_skbuff[i];
1169
1170 if (skb) {
1171 struct rx_desc *desc = &(rrpriv->rx_ring[i]);
1172
1173 pci_unmap_single(rrpriv->pci_dev, desc->addr.addrlo,
1174 dev->mtu + HIPPI_HLEN, PCI_DMA_FROMDEVICE);
1175 desc->size = 0;
1176 set_rraddr(&desc->addr, 0);
1177 dev_kfree_skb(skb);
1178 rrpriv->rx_skbuff[i] = NULL;
1179 }
1180 }
1181 }
1182
1183 static void rr_timer(unsigned long data)
1184 {
1185 struct net_device *dev = (struct net_device *)data;
1186 struct rr_private *rrpriv = netdev_priv(dev);
1187 struct rr_regs __iomem *regs = rrpriv->regs;
1188 unsigned long flags;
1189
1190 if (readl(&regs->HostCtrl) & NIC_HALTED){
1191 printk("%s: Restarting nic\n", dev->name);
1192 memset(rrpriv->rx_ctrl, 0, 256 * sizeof(struct ring_ctrl));
1193 memset(rrpriv->info, 0, sizeof(struct rr_info));
1194 wmb();
1195
1196 rr_raz_tx(rrpriv, dev);
1197 rr_raz_rx(rrpriv, dev);
1198
1199 if (rr_init1(dev)) {
1200 spin_lock_irqsave(&rrpriv->lock, flags);
1201 writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
1202 &regs->HostCtrl);
1203 spin_unlock_irqrestore(&rrpriv->lock, flags);
1204 }
1205 }
1206 rrpriv->timer.expires = RUN_AT(5*HZ);
1207 add_timer(&rrpriv->timer);
1208 }
1209
1210
1211 static int rr_open(struct net_device *dev)
1212 {
1213 struct rr_private *rrpriv = netdev_priv(dev);
1214 struct pci_dev *pdev = rrpriv->pci_dev;
1215 struct rr_regs __iomem *regs;
1216 int ecode = 0;
1217 unsigned long flags;
1218 dma_addr_t dma_addr;
1219
1220 regs = rrpriv->regs;
1221
1222 if (rrpriv->fw_rev < 0x00020000) {
1223 printk(KERN_WARNING "%s: trying to configure device with "
1224 "obsolete firmware\n", dev->name);
1225 ecode = -EBUSY;
1226 goto error;
1227 }
1228
1229 rrpriv->rx_ctrl = pci_alloc_consistent(pdev,
1230 256 * sizeof(struct ring_ctrl),
1231 &dma_addr);
1232 if (!rrpriv->rx_ctrl) {
1233 ecode = -ENOMEM;
1234 goto error;
1235 }
1236 rrpriv->rx_ctrl_dma = dma_addr;
1237 memset(rrpriv->rx_ctrl, 0, 256*sizeof(struct ring_ctrl));
1238
1239 rrpriv->info = pci_alloc_consistent(pdev, sizeof(struct rr_info),
1240 &dma_addr);
1241 if (!rrpriv->info) {
1242 ecode = -ENOMEM;
1243 goto error;
1244 }
1245 rrpriv->info_dma = dma_addr;
1246 memset(rrpriv->info, 0, sizeof(struct rr_info));
1247 wmb();
1248
1249 spin_lock_irqsave(&rrpriv->lock, flags);
1250 writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT, &regs->HostCtrl);
1251 readl(&regs->HostCtrl);
1252 spin_unlock_irqrestore(&rrpriv->lock, flags);
1253
1254 if (request_irq(dev->irq, rr_interrupt, IRQF_SHARED, dev->name, dev)) {
1255 printk(KERN_WARNING "%s: Requested IRQ %d is busy\n",
1256 dev->name, dev->irq);
1257 ecode = -EAGAIN;
1258 goto error;
1259 }
1260
1261 if ((ecode = rr_init1(dev)))
1262 goto error;
1263
1264 /* Set the timer to switch to check for link beat and perhaps switch
1265 to an alternate media type. */
1266 init_timer(&rrpriv->timer);
1267 rrpriv->timer.expires = RUN_AT(5*HZ); /* 5 sec. watchdog */
1268 rrpriv->timer.data = (unsigned long)dev;
1269 rrpriv->timer.function = &rr_timer; /* timer handler */
1270 add_timer(&rrpriv->timer);
1271
1272 netif_start_queue(dev);
1273
1274 return ecode;
1275
1276 error:
1277 spin_lock_irqsave(&rrpriv->lock, flags);
1278 writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT, &regs->HostCtrl);
1279 spin_unlock_irqrestore(&rrpriv->lock, flags);
1280
1281 if (rrpriv->info) {
1282 pci_free_consistent(pdev, sizeof(struct rr_info), rrpriv->info,
1283 rrpriv->info_dma);
1284 rrpriv->info = NULL;
1285 }
1286 if (rrpriv->rx_ctrl) {
1287 pci_free_consistent(pdev, sizeof(struct ring_ctrl),
1288 rrpriv->rx_ctrl, rrpriv->rx_ctrl_dma);
1289 rrpriv->rx_ctrl = NULL;
1290 }
1291
1292 netif_stop_queue(dev);
1293
1294 return ecode;
1295 }
1296
1297
1298 static void rr_dump(struct net_device *dev)
1299 {
1300 struct rr_private *rrpriv;
1301 struct rr_regs __iomem *regs;
1302 u32 index, cons;
1303 short i;
1304 int len;
1305
1306 rrpriv = netdev_priv(dev);
1307 regs = rrpriv->regs;
1308
1309 printk("%s: dumping NIC TX rings\n", dev->name);
1310
1311 printk("RxPrd %08x, TxPrd %02x, EvtPrd %08x, TxPi %02x, TxCtrlPi %02x\n",
1312 readl(&regs->RxPrd), readl(&regs->TxPrd),
1313 readl(&regs->EvtPrd), readl(&regs->TxPi),
1314 rrpriv->info->tx_ctrl.pi);
1315
1316 printk("Error code 0x%x\n", readl(&regs->Fail1));
1317
1318 index = (((readl(&regs->EvtPrd) >> 8) & 0xff ) - 1) % EVT_RING_ENTRIES;
1319 cons = rrpriv->dirty_tx;
1320 printk("TX ring index %i, TX consumer %i\n",
1321 index, cons);
1322
1323 if (rrpriv->tx_skbuff[index]){
1324 len = min_t(int, 0x80, rrpriv->tx_skbuff[index]->len);
1325 printk("skbuff for index %i is valid - dumping data (0x%x bytes - DMA len 0x%x)\n", index, len, rrpriv->tx_ring[index].size);
1326 for (i = 0; i < len; i++){
1327 if (!(i & 7))
1328 printk("\n");
1329 printk("%02x ", (unsigned char) rrpriv->tx_skbuff[index]->data[i]);
1330 }
1331 printk("\n");
1332 }
1333
1334 if (rrpriv->tx_skbuff[cons]){
1335 len = min_t(int, 0x80, rrpriv->tx_skbuff[cons]->len);
1336 printk("skbuff for cons %i is valid - dumping data (0x%x bytes - skbuff len 0x%x)\n", cons, len, rrpriv->tx_skbuff[cons]->len);
1337 printk("mode 0x%x, size 0x%x,\n phys %08Lx, skbuff-addr %08lx, truesize 0x%x\n",
1338 rrpriv->tx_ring[cons].mode,
1339 rrpriv->tx_ring[cons].size,
1340 (unsigned long long) rrpriv->tx_ring[cons].addr.addrlo,
1341 (unsigned long)rrpriv->tx_skbuff[cons]->data,
1342 (unsigned int)rrpriv->tx_skbuff[cons]->truesize);
1343 for (i = 0; i < len; i++){
1344 if (!(i & 7))
1345 printk("\n");
1346 printk("%02x ", (unsigned char)rrpriv->tx_ring[cons].size);
1347 }
1348 printk("\n");
1349 }
1350
1351 printk("dumping TX ring info:\n");
1352 for (i = 0; i < TX_RING_ENTRIES; i++)
1353 printk("mode 0x%x, size 0x%x, phys-addr %08Lx\n",
1354 rrpriv->tx_ring[i].mode,
1355 rrpriv->tx_ring[i].size,
1356 (unsigned long long) rrpriv->tx_ring[i].addr.addrlo);
1357
1358 }
1359
1360
1361 static int rr_close(struct net_device *dev)
1362 {
1363 struct rr_private *rrpriv;
1364 struct rr_regs __iomem *regs;
1365 unsigned long flags;
1366 u32 tmp;
1367 short i;
1368
1369 netif_stop_queue(dev);
1370
1371 rrpriv = netdev_priv(dev);
1372 regs = rrpriv->regs;
1373
1374 /*
1375 * Lock to make sure we are not cleaning up while another CPU
1376 * is handling interrupts.
1377 */
1378 spin_lock_irqsave(&rrpriv->lock, flags);
1379
1380 tmp = readl(&regs->HostCtrl);
1381 if (tmp & NIC_HALTED){
1382 printk("%s: NIC already halted\n", dev->name);
1383 rr_dump(dev);
1384 }else{
1385 tmp |= HALT_NIC | RR_CLEAR_INT;
1386 writel(tmp, &regs->HostCtrl);
1387 readl(&regs->HostCtrl);
1388 }
1389
1390 rrpriv->fw_running = 0;
1391
1392 del_timer_sync(&rrpriv->timer);
1393
1394 writel(0, &regs->TxPi);
1395 writel(0, &regs->IpRxPi);
1396
1397 writel(0, &regs->EvtCon);
1398 writel(0, &regs->EvtPrd);
1399
1400 for (i = 0; i < CMD_RING_ENTRIES; i++)
1401 writel(0, &regs->CmdRing[i]);
1402
1403 rrpriv->info->tx_ctrl.entries = 0;
1404 rrpriv->info->cmd_ctrl.pi = 0;
1405 rrpriv->info->evt_ctrl.pi = 0;
1406 rrpriv->rx_ctrl[4].entries = 0;
1407
1408 rr_raz_tx(rrpriv, dev);
1409 rr_raz_rx(rrpriv, dev);
1410
1411 pci_free_consistent(rrpriv->pci_dev, 256 * sizeof(struct ring_ctrl),
1412 rrpriv->rx_ctrl, rrpriv->rx_ctrl_dma);
1413 rrpriv->rx_ctrl = NULL;
1414
1415 pci_free_consistent(rrpriv->pci_dev, sizeof(struct rr_info),
1416 rrpriv->info, rrpriv->info_dma);
1417 rrpriv->info = NULL;
1418
1419 free_irq(dev->irq, dev);
1420 spin_unlock_irqrestore(&rrpriv->lock, flags);
1421
1422 return 0;
1423 }
1424
1425
1426 static int rr_start_xmit(struct sk_buff *skb, struct net_device *dev)
1427 {
1428 struct rr_private *rrpriv = netdev_priv(dev);
1429 struct rr_regs __iomem *regs = rrpriv->regs;
1430 struct hippi_cb *hcb = (struct hippi_cb *) skb->cb;
1431 struct ring_ctrl *txctrl;
1432 unsigned long flags;
1433 u32 index, len = skb->len;
1434 u32 *ifield;
1435 struct sk_buff *new_skb;
1436
1437 if (readl(&regs->Mode) & FATAL_ERR)
1438 printk("error codes Fail1 %02x, Fail2 %02x\n",
1439 readl(&regs->Fail1), readl(&regs->Fail2));
1440
1441 /*
1442 * We probably need to deal with tbusy here to prevent overruns.
1443 */
1444
1445 if (skb_headroom(skb) < 8){
1446 printk("incoming skb too small - reallocating\n");
1447 if (!(new_skb = dev_alloc_skb(len + 8))) {
1448 dev_kfree_skb(skb);
1449 netif_wake_queue(dev);
1450 return -EBUSY;
1451 }
1452 skb_reserve(new_skb, 8);
1453 skb_put(new_skb, len);
1454 skb_copy_from_linear_data(skb, new_skb->data, len);
1455 dev_kfree_skb(skb);
1456 skb = new_skb;
1457 }
1458
1459 ifield = (u32 *)skb_push(skb, 8);
1460
1461 ifield[0] = 0;
1462 ifield[1] = hcb->ifield;
1463
1464 /*
1465 * We don't need the lock before we are actually going to start
1466 * fiddling with the control blocks.
1467 */
1468 spin_lock_irqsave(&rrpriv->lock, flags);
1469
1470 txctrl = &rrpriv->info->tx_ctrl;
1471
1472 index = txctrl->pi;
1473
1474 rrpriv->tx_skbuff[index] = skb;
1475 set_rraddr(&rrpriv->tx_ring[index].addr, pci_map_single(
1476 rrpriv->pci_dev, skb->data, len + 8, PCI_DMA_TODEVICE));
1477 rrpriv->tx_ring[index].size = len + 8; /* include IFIELD */
1478 rrpriv->tx_ring[index].mode = PACKET_START | PACKET_END;
1479 txctrl->pi = (index + 1) % TX_RING_ENTRIES;
1480 wmb();
1481 writel(txctrl->pi, &regs->TxPi);
1482
1483 if (txctrl->pi == rrpriv->dirty_tx){
1484 rrpriv->tx_full = 1;
1485 netif_stop_queue(dev);
1486 }
1487
1488 spin_unlock_irqrestore(&rrpriv->lock, flags);
1489
1490 dev->trans_start = jiffies;
1491 return 0;
1492 }
1493
1494
1495 static struct net_device_stats *rr_get_stats(struct net_device *dev)
1496 {
1497 struct rr_private *rrpriv;
1498
1499 rrpriv = netdev_priv(dev);
1500
1501 return(&rrpriv->stats);
1502 }
1503
1504
1505 /*
1506 * Read the firmware out of the EEPROM and put it into the SRAM
1507 * (or from user space - later)
1508 *
1509 * This operation requires the NIC to be halted and is performed with
1510 * interrupts disabled and with the spinlock hold.
1511 */
1512 static int rr_load_firmware(struct net_device *dev)
1513 {
1514 struct rr_private *rrpriv;
1515 struct rr_regs __iomem *regs;
1516 unsigned long eptr, segptr;
1517 int i, j;
1518 u32 localctrl, sptr, len, tmp;
1519 u32 p2len, p2size, nr_seg, revision, io, sram_size;
1520 struct eeprom *hw = NULL;
1521
1522 rrpriv = netdev_priv(dev);
1523 regs = rrpriv->regs;
1524
1525 if (dev->flags & IFF_UP)
1526 return -EBUSY;
1527
1528 if (!(readl(&regs->HostCtrl) & NIC_HALTED)){
1529 printk("%s: Trying to load firmware to a running NIC.\n",
1530 dev->name);
1531 return -EBUSY;
1532 }
1533
1534 localctrl = readl(&regs->LocalCtrl);
1535 writel(0, &regs->LocalCtrl);
1536
1537 writel(0, &regs->EvtPrd);
1538 writel(0, &regs->RxPrd);
1539 writel(0, &regs->TxPrd);
1540
1541 /*
1542 * First wipe the entire SRAM, otherwise we might run into all
1543 * kinds of trouble ... sigh, this took almost all afternoon
1544 * to track down ;-(
1545 */
1546 io = readl(&regs->ExtIo);
1547 writel(0, &regs->ExtIo);
1548 sram_size = rr_read_eeprom_word(rrpriv, (void *)8);
1549
1550 for (i = 200; i < sram_size / 4; i++){
1551 writel(i * 4, &regs->WinBase);
1552 mb();
1553 writel(0, &regs->WinData);
1554 mb();
1555 }
1556 writel(io, &regs->ExtIo);
1557 mb();
1558
1559 eptr = (unsigned long)rr_read_eeprom_word(rrpriv,
1560 &hw->rncd_info.AddrRunCodeSegs);
1561 eptr = ((eptr & 0x1fffff) >> 3);
1562
1563 p2len = rr_read_eeprom_word(rrpriv, (void *)(0x83*4));
1564 p2len = (p2len << 2);
1565 p2size = rr_read_eeprom_word(rrpriv, (void *)(0x84*4));
1566 p2size = ((p2size & 0x1fffff) >> 3);
1567
1568 if ((eptr < p2size) || (eptr > (p2size + p2len))){
1569 printk("%s: eptr is invalid\n", dev->name);
1570 goto out;
1571 }
1572
1573 revision = rr_read_eeprom_word(rrpriv, &hw->manf.HeaderFmt);
1574
1575 if (revision != 1){
1576 printk("%s: invalid firmware format (%i)\n",
1577 dev->name, revision);
1578 goto out;
1579 }
1580
1581 nr_seg = rr_read_eeprom_word(rrpriv, (void *)eptr);
1582 eptr +=4;
1583 #if (DEBUG > 1)
1584 printk("%s: nr_seg %i\n", dev->name, nr_seg);
1585 #endif
1586
1587 for (i = 0; i < nr_seg; i++){
1588 sptr = rr_read_eeprom_word(rrpriv, (void *)eptr);
1589 eptr += 4;
1590 len = rr_read_eeprom_word(rrpriv, (void *)eptr);
1591 eptr += 4;
1592 segptr = (unsigned long)rr_read_eeprom_word(rrpriv, (void *)eptr);
1593 segptr = ((segptr & 0x1fffff) >> 3);
1594 eptr += 4;
1595 #if (DEBUG > 1)
1596 printk("%s: segment %i, sram address %06x, length %04x, segptr %06x\n",
1597 dev->name, i, sptr, len, segptr);
1598 #endif
1599 for (j = 0; j < len; j++){
1600 tmp = rr_read_eeprom_word(rrpriv, (void *)segptr);
1601 writel(sptr, &regs->WinBase);
1602 mb();
1603 writel(tmp, &regs->WinData);
1604 mb();
1605 segptr += 4;
1606 sptr += 4;
1607 }
1608 }
1609
1610 out:
1611 writel(localctrl, &regs->LocalCtrl);
1612 mb();
1613 return 0;
1614 }
1615
1616
1617 static int rr_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1618 {
1619 struct rr_private *rrpriv;
1620 unsigned char *image, *oldimage;
1621 unsigned long flags;
1622 unsigned int i;
1623 int error = -EOPNOTSUPP;
1624
1625 rrpriv = netdev_priv(dev);
1626
1627 switch(cmd){
1628 case SIOCRRGFW:
1629 if (!capable(CAP_SYS_RAWIO)){
1630 return -EPERM;
1631 }
1632
1633 image = kmalloc(EEPROM_WORDS * sizeof(u32), GFP_KERNEL);
1634 if (!image){
1635 printk(KERN_ERR "%s: Unable to allocate memory "
1636 "for EEPROM image\n", dev->name);
1637 return -ENOMEM;
1638 }
1639
1640
1641 if (rrpriv->fw_running){
1642 printk("%s: Firmware already running\n", dev->name);
1643 error = -EPERM;
1644 goto gf_out;
1645 }
1646
1647 spin_lock_irqsave(&rrpriv->lock, flags);
1648 i = rr_read_eeprom(rrpriv, 0, image, EEPROM_BYTES);
1649 spin_unlock_irqrestore(&rrpriv->lock, flags);
1650 if (i != EEPROM_BYTES){
1651 printk(KERN_ERR "%s: Error reading EEPROM\n",
1652 dev->name);
1653 error = -EFAULT;
1654 goto gf_out;
1655 }
1656 error = copy_to_user(rq->ifr_data, image, EEPROM_BYTES);
1657 if (error)
1658 error = -EFAULT;
1659 gf_out:
1660 kfree(image);
1661 return error;
1662
1663 case SIOCRRPFW:
1664 if (!capable(CAP_SYS_RAWIO)){
1665 return -EPERM;
1666 }
1667
1668 image = kmalloc(EEPROM_WORDS * sizeof(u32), GFP_KERNEL);
1669 oldimage = kmalloc(EEPROM_WORDS * sizeof(u32), GFP_KERNEL);
1670 if (!image || !oldimage) {
1671 printk(KERN_ERR "%s: Unable to allocate memory "
1672 "for EEPROM image\n", dev->name);
1673 error = -ENOMEM;
1674 goto wf_out;
1675 }
1676
1677 error = copy_from_user(image, rq->ifr_data, EEPROM_BYTES);
1678 if (error) {
1679 error = -EFAULT;
1680 goto wf_out;
1681 }
1682
1683 if (rrpriv->fw_running){
1684 printk("%s: Firmware already running\n", dev->name);
1685 error = -EPERM;
1686 goto wf_out;
1687 }
1688
1689 printk("%s: Updating EEPROM firmware\n", dev->name);
1690
1691 spin_lock_irqsave(&rrpriv->lock, flags);
1692 error = write_eeprom(rrpriv, 0, image, EEPROM_BYTES);
1693 if (error)
1694 printk(KERN_ERR "%s: Error writing EEPROM\n",
1695 dev->name);
1696
1697 i = rr_read_eeprom(rrpriv, 0, oldimage, EEPROM_BYTES);
1698 spin_unlock_irqrestore(&rrpriv->lock, flags);
1699
1700 if (i != EEPROM_BYTES)
1701 printk(KERN_ERR "%s: Error reading back EEPROM "
1702 "image\n", dev->name);
1703
1704 error = memcmp(image, oldimage, EEPROM_BYTES);
1705 if (error){
1706 printk(KERN_ERR "%s: Error verifying EEPROM image\n",
1707 dev->name);
1708 error = -EFAULT;
1709 }
1710 wf_out:
1711 kfree(oldimage);
1712 kfree(image);
1713 return error;
1714
1715 case SIOCRRID:
1716 return put_user(0x52523032, (int __user *)rq->ifr_data);
1717 default:
1718 return error;
1719 }
1720 }
1721
1722 static struct pci_device_id rr_pci_tbl[] = {
1723 { PCI_VENDOR_ID_ESSENTIAL, PCI_DEVICE_ID_ESSENTIAL_ROADRUNNER,
1724 PCI_ANY_ID, PCI_ANY_ID, },
1725 { 0,}
1726 };
1727 MODULE_DEVICE_TABLE(pci, rr_pci_tbl);
1728
1729 static struct pci_driver rr_driver = {
1730 .name = "rrunner",
1731 .id_table = rr_pci_tbl,
1732 .probe = rr_init_one,
1733 .remove = __devexit_p(rr_remove_one),
1734 };
1735
1736 static int __init rr_init_module(void)
1737 {
1738 return pci_register_driver(&rr_driver);
1739 }
1740
1741 static void __exit rr_cleanup_module(void)
1742 {
1743 pci_unregister_driver(&rr_driver);
1744 }
1745
1746 module_init(rr_init_module);
1747 module_exit(rr_cleanup_module);
1748
1749 /*
1750 * Local variables:
1751 * compile-command: "gcc -D__KERNEL__ -I../../include -Wall -Wstrict-prototypes -O2 -pipe -fomit-frame-pointer -fno-strength-reduce -m486 -malign-loops=2 -malign-jumps=2 -malign-functions=2 -DMODULE -DMODVERSIONS -include ../../include/linux/modversions.h -c rrunner.c"
1752 * End:
1753 */
Linus' kernel tree