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[ARM] 4189/1: AT91: MACB Ethernet clock
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / rrunner.c
blobd81536f90df62e10aefd98e83f597f663e5d925c
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->dev = dev;
1033 skb->protocol = hippi_type_trans(skb, dev);
1034
1035 netif_rx(skb); /* send it up */
1036
1037 dev->last_rx = jiffies;
1038 rrpriv->stats.rx_packets++;
1039 rrpriv->stats.rx_bytes += pkt_len;
1040 }
1041 defer:
1042 desc->mode = 0;
1043 desc->size = dev->mtu + HIPPI_HLEN;
1044
1045 if ((index & 7) == 7)
1046 writel(index, &regs->IpRxPi);
1047
1048 index = (index + 1) % RX_RING_ENTRIES;
1049 } while(index != rxlimit);
1050
1051 rrpriv->cur_rx = index;
1052 wmb();
1053 }
1054
1055
1056 static irqreturn_t rr_interrupt(int irq, void *dev_id)
1057 {
1058 struct rr_private *rrpriv;
1059 struct rr_regs __iomem *regs;
1060 struct net_device *dev = (struct net_device *)dev_id;
1061 u32 prodidx, rxindex, eidx, txcsmr, rxlimit, txcon;
1062
1063 rrpriv = netdev_priv(dev);
1064 regs = rrpriv->regs;
1065
1066 if (!(readl(&regs->HostCtrl) & RR_INT))
1067 return IRQ_NONE;
1068
1069 spin_lock(&rrpriv->lock);
1070
1071 prodidx = readl(&regs->EvtPrd);
1072 txcsmr = (prodidx >> 8) & 0xff;
1073 rxlimit = (prodidx >> 16) & 0xff;
1074 prodidx &= 0xff;
1075
1076 #if (DEBUG > 2)
1077 printk("%s: interrupt, prodidx = %i, eidx = %i\n", dev->name,
1078 prodidx, rrpriv->info->evt_ctrl.pi);
1079 #endif
1080 /*
1081 * Order here is important. We must handle events
1082 * before doing anything else in order to catch
1083 * such things as LLRC errors, etc -kbf
1084 */
1085
1086 eidx = rrpriv->info->evt_ctrl.pi;
1087 if (prodidx != eidx)
1088 eidx = rr_handle_event(dev, prodidx, eidx);
1089
1090 rxindex = rrpriv->cur_rx;
1091 if (rxindex != rxlimit)
1092 rx_int(dev, rxlimit, rxindex);
1093
1094 txcon = rrpriv->dirty_tx;
1095 if (txcsmr != txcon) {
1096 do {
1097 /* Due to occational firmware TX producer/consumer out
1098 * of sync. error need to check entry in ring -kbf
1099 */
1100 if(rrpriv->tx_skbuff[txcon]){
1101 struct tx_desc *desc;
1102 struct sk_buff *skb;
1103
1104 desc = &(rrpriv->tx_ring[txcon]);
1105 skb = rrpriv->tx_skbuff[txcon];
1106
1107 rrpriv->stats.tx_packets++;
1108 rrpriv->stats.tx_bytes += skb->len;
1109
1110 pci_unmap_single(rrpriv->pci_dev,
1111 desc->addr.addrlo, skb->len,
1112 PCI_DMA_TODEVICE);
1113 dev_kfree_skb_irq(skb);
1114
1115 rrpriv->tx_skbuff[txcon] = NULL;
1116 desc->size = 0;
1117 set_rraddr(&rrpriv->tx_ring[txcon].addr, 0);
1118 desc->mode = 0;
1119 }
1120 txcon = (txcon + 1) % TX_RING_ENTRIES;
1121 } while (txcsmr != txcon);
1122 wmb();
1123
1124 rrpriv->dirty_tx = txcon;
1125 if (rrpriv->tx_full && rr_if_busy(dev) &&
1126 (((rrpriv->info->tx_ctrl.pi + 1) % TX_RING_ENTRIES)
1127 != rrpriv->dirty_tx)){
1128 rrpriv->tx_full = 0;
1129 netif_wake_queue(dev);
1130 }
1131 }
1132
1133 eidx |= ((txcsmr << 8) | (rxlimit << 16));
1134 writel(eidx, &regs->EvtCon);
1135 wmb();
1136
1137 spin_unlock(&rrpriv->lock);
1138 return IRQ_HANDLED;
1139 }
1140
1141 static inline void rr_raz_tx(struct rr_private *rrpriv,
1142 struct net_device *dev)
1143 {
1144 int i;
1145
1146 for (i = 0; i < TX_RING_ENTRIES; i++) {
1147 struct sk_buff *skb = rrpriv->tx_skbuff[i];
1148
1149 if (skb) {
1150 struct tx_desc *desc = &(rrpriv->tx_ring[i]);
1151
1152 pci_unmap_single(rrpriv->pci_dev, desc->addr.addrlo,
1153 skb->len, PCI_DMA_TODEVICE);
1154 desc->size = 0;
1155 set_rraddr(&desc->addr, 0);
1156 dev_kfree_skb(skb);
1157 rrpriv->tx_skbuff[i] = NULL;
1158 }
1159 }
1160 }
1161
1162
1163 static inline void rr_raz_rx(struct rr_private *rrpriv,
1164 struct net_device *dev)
1165 {
1166 int i;
1167
1168 for (i = 0; i < RX_RING_ENTRIES; i++) {
1169 struct sk_buff *skb = rrpriv->rx_skbuff[i];
1170
1171 if (skb) {
1172 struct rx_desc *desc = &(rrpriv->rx_ring[i]);
1173
1174 pci_unmap_single(rrpriv->pci_dev, desc->addr.addrlo,
1175 dev->mtu + HIPPI_HLEN, PCI_DMA_FROMDEVICE);
1176 desc->size = 0;
1177 set_rraddr(&desc->addr, 0);
1178 dev_kfree_skb(skb);
1179 rrpriv->rx_skbuff[i] = NULL;
1180 }
1181 }
1182 }
1183
1184 static void rr_timer(unsigned long data)
1185 {
1186 struct net_device *dev = (struct net_device *)data;
1187 struct rr_private *rrpriv = netdev_priv(dev);
1188 struct rr_regs __iomem *regs = rrpriv->regs;
1189 unsigned long flags;
1190
1191 if (readl(&regs->HostCtrl) & NIC_HALTED){
1192 printk("%s: Restarting nic\n", dev->name);
1193 memset(rrpriv->rx_ctrl, 0, 256 * sizeof(struct ring_ctrl));
1194 memset(rrpriv->info, 0, sizeof(struct rr_info));
1195 wmb();
1196
1197 rr_raz_tx(rrpriv, dev);
1198 rr_raz_rx(rrpriv, dev);
1199
1200 if (rr_init1(dev)) {
1201 spin_lock_irqsave(&rrpriv->lock, flags);
1202 writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
1203 &regs->HostCtrl);
1204 spin_unlock_irqrestore(&rrpriv->lock, flags);
1205 }
1206 }
1207 rrpriv->timer.expires = RUN_AT(5*HZ);
1208 add_timer(&rrpriv->timer);
1209 }
1210
1211
1212 static int rr_open(struct net_device *dev)
1213 {
1214 struct rr_private *rrpriv = netdev_priv(dev);
1215 struct pci_dev *pdev = rrpriv->pci_dev;
1216 struct rr_regs __iomem *regs;
1217 int ecode = 0;
1218 unsigned long flags;
1219 dma_addr_t dma_addr;
1220
1221 regs = rrpriv->regs;
1222
1223 if (rrpriv->fw_rev < 0x00020000) {
1224 printk(KERN_WARNING "%s: trying to configure device with "
1225 "obsolete firmware\n", dev->name);
1226 ecode = -EBUSY;
1227 goto error;
1228 }
1229
1230 rrpriv->rx_ctrl = pci_alloc_consistent(pdev,
1231 256 * sizeof(struct ring_ctrl),
1232 &dma_addr);
1233 if (!rrpriv->rx_ctrl) {
1234 ecode = -ENOMEM;
1235 goto error;
1236 }
1237 rrpriv->rx_ctrl_dma = dma_addr;
1238 memset(rrpriv->rx_ctrl, 0, 256*sizeof(struct ring_ctrl));
1239
1240 rrpriv->info = pci_alloc_consistent(pdev, sizeof(struct rr_info),
1241 &dma_addr);
1242 if (!rrpriv->info) {
1243 ecode = -ENOMEM;
1244 goto error;
1245 }
1246 rrpriv->info_dma = dma_addr;
1247 memset(rrpriv->info, 0, sizeof(struct rr_info));
1248 wmb();
1249
1250 spin_lock_irqsave(&rrpriv->lock, flags);
1251 writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT, &regs->HostCtrl);
1252 readl(&regs->HostCtrl);
1253 spin_unlock_irqrestore(&rrpriv->lock, flags);
1254
1255 if (request_irq(dev->irq, rr_interrupt, IRQF_SHARED, dev->name, dev)) {
1256 printk(KERN_WARNING "%s: Requested IRQ %d is busy\n",
1257 dev->name, dev->irq);
1258 ecode = -EAGAIN;
1259 goto error;
1260 }
1261
1262 if ((ecode = rr_init1(dev)))
1263 goto error;
1264
1265 /* Set the timer to switch to check for link beat and perhaps switch
1266 to an alternate media type. */
1267 init_timer(&rrpriv->timer);
1268 rrpriv->timer.expires = RUN_AT(5*HZ); /* 5 sec. watchdog */
1269 rrpriv->timer.data = (unsigned long)dev;
1270 rrpriv->timer.function = &rr_timer; /* timer handler */
1271 add_timer(&rrpriv->timer);
1272
1273 netif_start_queue(dev);
1274
1275 return ecode;
1276
1277 error:
1278 spin_lock_irqsave(&rrpriv->lock, flags);
1279 writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT, &regs->HostCtrl);
1280 spin_unlock_irqrestore(&rrpriv->lock, flags);
1281
1282 if (rrpriv->info) {
1283 pci_free_consistent(pdev, sizeof(struct rr_info), rrpriv->info,
1284 rrpriv->info_dma);
1285 rrpriv->info = NULL;
1286 }
1287 if (rrpriv->rx_ctrl) {
1288 pci_free_consistent(pdev, sizeof(struct ring_ctrl),
1289 rrpriv->rx_ctrl, rrpriv->rx_ctrl_dma);
1290 rrpriv->rx_ctrl = NULL;
1291 }
1292
1293 netif_stop_queue(dev);
1294
1295 return ecode;
1296 }
1297
1298
1299 static void rr_dump(struct net_device *dev)
1300 {
1301 struct rr_private *rrpriv;
1302 struct rr_regs __iomem *regs;
1303 u32 index, cons;
1304 short i;
1305 int len;
1306
1307 rrpriv = netdev_priv(dev);
1308 regs = rrpriv->regs;
1309
1310 printk("%s: dumping NIC TX rings\n", dev->name);
1311
1312 printk("RxPrd %08x, TxPrd %02x, EvtPrd %08x, TxPi %02x, TxCtrlPi %02x\n",
1313 readl(&regs->RxPrd), readl(&regs->TxPrd),
1314 readl(&regs->EvtPrd), readl(&regs->TxPi),
1315 rrpriv->info->tx_ctrl.pi);
1316
1317 printk("Error code 0x%x\n", readl(&regs->Fail1));
1318
1319 index = (((readl(&regs->EvtPrd) >> 8) & 0xff ) - 1) % EVT_RING_ENTRIES;
1320 cons = rrpriv->dirty_tx;
1321 printk("TX ring index %i, TX consumer %i\n",
1322 index, cons);
1323
1324 if (rrpriv->tx_skbuff[index]){
1325 len = min_t(int, 0x80, rrpriv->tx_skbuff[index]->len);
1326 printk("skbuff for index %i is valid - dumping data (0x%x bytes - DMA len 0x%x)\n", index, len, rrpriv->tx_ring[index].size);
1327 for (i = 0; i < len; i++){
1328 if (!(i & 7))
1329 printk("\n");
1330 printk("%02x ", (unsigned char) rrpriv->tx_skbuff[index]->data[i]);
1331 }
1332 printk("\n");
1333 }
1334
1335 if (rrpriv->tx_skbuff[cons]){
1336 len = min_t(int, 0x80, rrpriv->tx_skbuff[cons]->len);
1337 printk("skbuff for cons %i is valid - dumping data (0x%x bytes - skbuff len 0x%x)\n", cons, len, rrpriv->tx_skbuff[cons]->len);
1338 printk("mode 0x%x, size 0x%x,\n phys %08Lx, skbuff-addr %08lx, truesize 0x%x\n",
1339 rrpriv->tx_ring[cons].mode,
1340 rrpriv->tx_ring[cons].size,
1341 (unsigned long long) rrpriv->tx_ring[cons].addr.addrlo,
1342 (unsigned long)rrpriv->tx_skbuff[cons]->data,
1343 (unsigned int)rrpriv->tx_skbuff[cons]->truesize);
1344 for (i = 0; i < len; i++){
1345 if (!(i & 7))
1346 printk("\n");
1347 printk("%02x ", (unsigned char)rrpriv->tx_ring[cons].size);
1348 }
1349 printk("\n");
1350 }
1351
1352 printk("dumping TX ring info:\n");
1353 for (i = 0; i < TX_RING_ENTRIES; i++)
1354 printk("mode 0x%x, size 0x%x, phys-addr %08Lx\n",
1355 rrpriv->tx_ring[i].mode,
1356 rrpriv->tx_ring[i].size,
1357 (unsigned long long) rrpriv->tx_ring[i].addr.addrlo);
1358
1359 }
1360
1361
1362 static int rr_close(struct net_device *dev)
1363 {
1364 struct rr_private *rrpriv;
1365 struct rr_regs __iomem *regs;
1366 unsigned long flags;
1367 u32 tmp;
1368 short i;
1369
1370 netif_stop_queue(dev);
1371
1372 rrpriv = netdev_priv(dev);
1373 regs = rrpriv->regs;
1374
1375 /*
1376 * Lock to make sure we are not cleaning up while another CPU
1377 * is handling interrupts.
1378 */
1379 spin_lock_irqsave(&rrpriv->lock, flags);
1380
1381 tmp = readl(&regs->HostCtrl);
1382 if (tmp & NIC_HALTED){
1383 printk("%s: NIC already halted\n", dev->name);
1384 rr_dump(dev);
1385 }else{
1386 tmp |= HALT_NIC | RR_CLEAR_INT;
1387 writel(tmp, &regs->HostCtrl);
1388 readl(&regs->HostCtrl);
1389 }
1390
1391 rrpriv->fw_running = 0;
1392
1393 del_timer_sync(&rrpriv->timer);
1394
1395 writel(0, &regs->TxPi);
1396 writel(0, &regs->IpRxPi);
1397
1398 writel(0, &regs->EvtCon);
1399 writel(0, &regs->EvtPrd);
1400
1401 for (i = 0; i < CMD_RING_ENTRIES; i++)
1402 writel(0, &regs->CmdRing[i]);
1403
1404 rrpriv->info->tx_ctrl.entries = 0;
1405 rrpriv->info->cmd_ctrl.pi = 0;
1406 rrpriv->info->evt_ctrl.pi = 0;
1407 rrpriv->rx_ctrl[4].entries = 0;
1408
1409 rr_raz_tx(rrpriv, dev);
1410 rr_raz_rx(rrpriv, dev);
1411
1412 pci_free_consistent(rrpriv->pci_dev, 256 * sizeof(struct ring_ctrl),
1413 rrpriv->rx_ctrl, rrpriv->rx_ctrl_dma);
1414 rrpriv->rx_ctrl = NULL;
1415
1416 pci_free_consistent(rrpriv->pci_dev, sizeof(struct rr_info),
1417 rrpriv->info, rrpriv->info_dma);
1418 rrpriv->info = NULL;
1419
1420 free_irq(dev->irq, dev);
1421 spin_unlock_irqrestore(&rrpriv->lock, flags);
1422
1423 return 0;
1424 }
1425
1426
1427 static int rr_start_xmit(struct sk_buff *skb, struct net_device *dev)
1428 {
1429 struct rr_private *rrpriv = netdev_priv(dev);
1430 struct rr_regs __iomem *regs = rrpriv->regs;
1431 struct hippi_cb *hcb = (struct hippi_cb *) skb->cb;
1432 struct ring_ctrl *txctrl;
1433 unsigned long flags;
1434 u32 index, len = skb->len;
1435 u32 *ifield;
1436 struct sk_buff *new_skb;
1437
1438 if (readl(&regs->Mode) & FATAL_ERR)
1439 printk("error codes Fail1 %02x, Fail2 %02x\n",
1440 readl(&regs->Fail1), readl(&regs->Fail2));
1441
1442 /*
1443 * We probably need to deal with tbusy here to prevent overruns.
1444 */
1445
1446 if (skb_headroom(skb) < 8){
1447 printk("incoming skb too small - reallocating\n");
1448 if (!(new_skb = dev_alloc_skb(len + 8))) {
1449 dev_kfree_skb(skb);
1450 netif_wake_queue(dev);
1451 return -EBUSY;
1452 }
1453 skb_reserve(new_skb, 8);
1454 skb_put(new_skb, len);
1455 memcpy(new_skb->data, skb->data, len);
1456 dev_kfree_skb(skb);
1457 skb = new_skb;
1458 }
1459
1460 ifield = (u32 *)skb_push(skb, 8);
1461
1462 ifield[0] = 0;
1463 ifield[1] = hcb->ifield;
1464
1465 /*
1466 * We don't need the lock before we are actually going to start
1467 * fiddling with the control blocks.
1468 */
1469 spin_lock_irqsave(&rrpriv->lock, flags);
1470
1471 txctrl = &rrpriv->info->tx_ctrl;
1472
1473 index = txctrl->pi;
1474
1475 rrpriv->tx_skbuff[index] = skb;
1476 set_rraddr(&rrpriv->tx_ring[index].addr, pci_map_single(
1477 rrpriv->pci_dev, skb->data, len + 8, PCI_DMA_TODEVICE));
1478 rrpriv->tx_ring[index].size = len + 8; /* include IFIELD */
1479 rrpriv->tx_ring[index].mode = PACKET_START | PACKET_END;
1480 txctrl->pi = (index + 1) % TX_RING_ENTRIES;
1481 wmb();
1482 writel(txctrl->pi, &regs->TxPi);
1483
1484 if (txctrl->pi == rrpriv->dirty_tx){
1485 rrpriv->tx_full = 1;
1486 netif_stop_queue(dev);
1487 }
1488
1489 spin_unlock_irqrestore(&rrpriv->lock, flags);
1490
1491 dev->trans_start = jiffies;
1492 return 0;
1493 }
1494
1495
1496 static struct net_device_stats *rr_get_stats(struct net_device *dev)
1497 {
1498 struct rr_private *rrpriv;
1499
1500 rrpriv = netdev_priv(dev);
1501
1502 return(&rrpriv->stats);
1503 }
1504
1505
1506 /*
1507 * Read the firmware out of the EEPROM and put it into the SRAM
1508 * (or from user space - later)
1509 *
1510 * This operation requires the NIC to be halted and is performed with
1511 * interrupts disabled and with the spinlock hold.
1512 */
1513 static int rr_load_firmware(struct net_device *dev)
1514 {
1515 struct rr_private *rrpriv;
1516 struct rr_regs __iomem *regs;
1517 unsigned long eptr, segptr;
1518 int i, j;
1519 u32 localctrl, sptr, len, tmp;
1520 u32 p2len, p2size, nr_seg, revision, io, sram_size;
1521 struct eeprom *hw = NULL;
1522
1523 rrpriv = netdev_priv(dev);
1524 regs = rrpriv->regs;
1525
1526 if (dev->flags & IFF_UP)
1527 return -EBUSY;
1528
1529 if (!(readl(&regs->HostCtrl) & NIC_HALTED)){
1530 printk("%s: Trying to load firmware to a running NIC.\n",
1531 dev->name);
1532 return -EBUSY;
1533 }
1534
1535 localctrl = readl(&regs->LocalCtrl);
1536 writel(0, &regs->LocalCtrl);
1537
1538 writel(0, &regs->EvtPrd);
1539 writel(0, &regs->RxPrd);
1540 writel(0, &regs->TxPrd);
1541
1542 /*
1543 * First wipe the entire SRAM, otherwise we might run into all
1544 * kinds of trouble ... sigh, this took almost all afternoon
1545 * to track down ;-(
1546 */
1547 io = readl(&regs->ExtIo);
1548 writel(0, &regs->ExtIo);
1549 sram_size = rr_read_eeprom_word(rrpriv, (void *)8);
1550
1551 for (i = 200; i < sram_size / 4; i++){
1552 writel(i * 4, &regs->WinBase);
1553 mb();
1554 writel(0, &regs->WinData);
1555 mb();
1556 }
1557 writel(io, &regs->ExtIo);
1558 mb();
1559
1560 eptr = (unsigned long)rr_read_eeprom_word(rrpriv,
1561 &hw->rncd_info.AddrRunCodeSegs);
1562 eptr = ((eptr & 0x1fffff) >> 3);
1563
1564 p2len = rr_read_eeprom_word(rrpriv, (void *)(0x83*4));
1565 p2len = (p2len << 2);
1566 p2size = rr_read_eeprom_word(rrpriv, (void *)(0x84*4));
1567 p2size = ((p2size & 0x1fffff) >> 3);
1568
1569 if ((eptr < p2size) || (eptr > (p2size + p2len))){
1570 printk("%s: eptr is invalid\n", dev->name);
1571 goto out;
1572 }
1573
1574 revision = rr_read_eeprom_word(rrpriv, &hw->manf.HeaderFmt);
1575
1576 if (revision != 1){
1577 printk("%s: invalid firmware format (%i)\n",
1578 dev->name, revision);
1579 goto out;
1580 }
1581
1582 nr_seg = rr_read_eeprom_word(rrpriv, (void *)eptr);
1583 eptr +=4;
1584 #if (DEBUG > 1)
1585 printk("%s: nr_seg %i\n", dev->name, nr_seg);
1586 #endif
1587
1588 for (i = 0; i < nr_seg; i++){
1589 sptr = rr_read_eeprom_word(rrpriv, (void *)eptr);
1590 eptr += 4;
1591 len = rr_read_eeprom_word(rrpriv, (void *)eptr);
1592 eptr += 4;
1593 segptr = (unsigned long)rr_read_eeprom_word(rrpriv, (void *)eptr);
1594 segptr = ((segptr & 0x1fffff) >> 3);
1595 eptr += 4;
1596 #if (DEBUG > 1)
1597 printk("%s: segment %i, sram address %06x, length %04x, segptr %06x\n",
1598 dev->name, i, sptr, len, segptr);
1599 #endif
1600 for (j = 0; j < len; j++){
1601 tmp = rr_read_eeprom_word(rrpriv, (void *)segptr);
1602 writel(sptr, &regs->WinBase);
1603 mb();
1604 writel(tmp, &regs->WinData);
1605 mb();
1606 segptr += 4;
1607 sptr += 4;
1608 }
1609 }
1610
1611 out:
1612 writel(localctrl, &regs->LocalCtrl);
1613 mb();
1614 return 0;
1615 }
1616
1617
1618 static int rr_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1619 {
1620 struct rr_private *rrpriv;
1621 unsigned char *image, *oldimage;
1622 unsigned long flags;
1623 unsigned int i;
1624 int error = -EOPNOTSUPP;
1625
1626 rrpriv = netdev_priv(dev);
1627
1628 switch(cmd){
1629 case SIOCRRGFW:
1630 if (!capable(CAP_SYS_RAWIO)){
1631 return -EPERM;
1632 }
1633
1634 image = kmalloc(EEPROM_WORDS * sizeof(u32), GFP_KERNEL);
1635 if (!image){
1636 printk(KERN_ERR "%s: Unable to allocate memory "
1637 "for EEPROM image\n", dev->name);
1638 return -ENOMEM;
1639 }
1640
1641
1642 if (rrpriv->fw_running){
1643 printk("%s: Firmware already running\n", dev->name);
1644 error = -EPERM;
1645 goto gf_out;
1646 }
1647
1648 spin_lock_irqsave(&rrpriv->lock, flags);
1649 i = rr_read_eeprom(rrpriv, 0, image, EEPROM_BYTES);
1650 spin_unlock_irqrestore(&rrpriv->lock, flags);
1651 if (i != EEPROM_BYTES){
1652 printk(KERN_ERR "%s: Error reading EEPROM\n",
1653 dev->name);
1654 error = -EFAULT;
1655 goto gf_out;
1656 }
1657 error = copy_to_user(rq->ifr_data, image, EEPROM_BYTES);
1658 if (error)
1659 error = -EFAULT;
1660 gf_out:
1661 kfree(image);
1662 return error;
1663
1664 case SIOCRRPFW:
1665 if (!capable(CAP_SYS_RAWIO)){
1666 return -EPERM;
1667 }
1668
1669 image = kmalloc(EEPROM_WORDS * sizeof(u32), GFP_KERNEL);
1670 oldimage = kmalloc(EEPROM_WORDS * sizeof(u32), GFP_KERNEL);
1671 if (!image || !oldimage) {
1672 printk(KERN_ERR "%s: Unable to allocate memory "
1673 "for EEPROM image\n", dev->name);
1674 error = -ENOMEM;
1675 goto wf_out;
1676 }
1677
1678 error = copy_from_user(image, rq->ifr_data, EEPROM_BYTES);
1679 if (error) {
1680 error = -EFAULT;
1681 goto wf_out;
1682 }
1683
1684 if (rrpriv->fw_running){
1685 printk("%s: Firmware already running\n", dev->name);
1686 error = -EPERM;
1687 goto wf_out;
1688 }
1689
1690 printk("%s: Updating EEPROM firmware\n", dev->name);
1691
1692 spin_lock_irqsave(&rrpriv->lock, flags);
1693 error = write_eeprom(rrpriv, 0, image, EEPROM_BYTES);
1694 if (error)
1695 printk(KERN_ERR "%s: Error writing EEPROM\n",
1696 dev->name);
1697
1698 i = rr_read_eeprom(rrpriv, 0, oldimage, EEPROM_BYTES);
1699 spin_unlock_irqrestore(&rrpriv->lock, flags);
1700
1701 if (i != EEPROM_BYTES)
1702 printk(KERN_ERR "%s: Error reading back EEPROM "
1703 "image\n", dev->name);
1704
1705 error = memcmp(image, oldimage, EEPROM_BYTES);
1706 if (error){
1707 printk(KERN_ERR "%s: Error verifying EEPROM image\n",
1708 dev->name);
1709 error = -EFAULT;
1710 }
1711 wf_out:
1712 kfree(oldimage);
1713 kfree(image);
1714 return error;
1715
1716 case SIOCRRID:
1717 return put_user(0x52523032, (int __user *)rq->ifr_data);
1718 default:
1719 return error;
1720 }
1721 }
1722
1723 static struct pci_device_id rr_pci_tbl[] = {
1724 { PCI_VENDOR_ID_ESSENTIAL, PCI_DEVICE_ID_ESSENTIAL_ROADRUNNER,
1725 PCI_ANY_ID, PCI_ANY_ID, },
1726 { 0,}
1727 };
1728 MODULE_DEVICE_TABLE(pci, rr_pci_tbl);
1729
1730 static struct pci_driver rr_driver = {
1731 .name = "rrunner",
1732 .id_table = rr_pci_tbl,
1733 .probe = rr_init_one,
1734 .remove = __devexit_p(rr_remove_one),
1735 };
1736
1737 static int __init rr_init_module(void)
1738 {
1739 return pci_register_driver(&rr_driver);
1740 }
1741
1742 static void __exit rr_cleanup_module(void)
1743 {
1744 pci_unregister_driver(&rr_driver);
1745 }
1746
1747 module_init(rr_init_module);
1748 module_exit(rr_cleanup_module);
1749
1750 /*
1751 * Local variables:
1752 * 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"
1753 * End:
1754 */
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree