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i386: handle an initrd in highmem (version 2)
[linux-2.6/linux-2.6-openrd.git] / drivers / atm / nicstar.c
blob0c205b000e8b9038e6f175e2f6455e107df71c55
1 /******************************************************************************
2 *
3 * nicstar.c
4 *
5 * Device driver supporting CBR for IDT 77201/77211 "NICStAR" based cards.
6 *
7 * IMPORTANT: The included file nicstarmac.c was NOT WRITTEN BY ME.
8 * It was taken from the frle-0.22 device driver.
9 * As the file doesn't have a copyright notice, in the file
10 * nicstarmac.copyright I put the copyright notice from the
11 * frle-0.22 device driver.
12 * Some code is based on the nicstar driver by M. Welsh.
13 *
14 * Author: Rui Prior (rprior@inescn.pt)
15 * PowerPC support by Jay Talbott (jay_talbott@mcg.mot.com) April 1999
16 *
17 *
18 * (C) INESC 1999
19 *
20 *
21 ******************************************************************************/
22
23
24 /**** IMPORTANT INFORMATION ***************************************************
25 *
26 * There are currently three types of spinlocks:
27 *
28 * 1 - Per card interrupt spinlock (to protect structures and such)
29 * 2 - Per SCQ scq spinlock
30 * 3 - Per card resource spinlock (to access registers, etc.)
31 *
32 * These must NEVER be grabbed in reverse order.
33 *
34 ******************************************************************************/
35
36 /* Header files ***************************************************************/
37
38 #include <linux/module.h>
39 #include <linux/kernel.h>
40 #include <linux/skbuff.h>
41 #include <linux/atmdev.h>
42 #include <linux/atm.h>
43 #include <linux/pci.h>
44 #include <linux/types.h>
45 #include <linux/string.h>
46 #include <linux/delay.h>
47 #include <linux/init.h>
48 #include <linux/sched.h>
49 #include <linux/timer.h>
50 #include <linux/interrupt.h>
51 #include <linux/bitops.h>
52 #include <asm/io.h>
53 #include <asm/uaccess.h>
54 #include <asm/atomic.h>
55 #include "nicstar.h"
56 #ifdef CONFIG_ATM_NICSTAR_USE_SUNI
57 #include "suni.h"
58 #endif /* CONFIG_ATM_NICSTAR_USE_SUNI */
59 #ifdef CONFIG_ATM_NICSTAR_USE_IDT77105
60 #include "idt77105.h"
61 #endif /* CONFIG_ATM_NICSTAR_USE_IDT77105 */
62
63 #if BITS_PER_LONG != 32
64 # error FIXME: this driver requires a 32-bit platform
65 #endif
66
67 /* Additional code ************************************************************/
68
69 #include "nicstarmac.c"
70
71
72 /* Configurable parameters ****************************************************/
73
74 #undef PHY_LOOPBACK
75 #undef TX_DEBUG
76 #undef RX_DEBUG
77 #undef GENERAL_DEBUG
78 #undef EXTRA_DEBUG
79
80 #undef NS_USE_DESTRUCTORS /* For now keep this undefined unless you know
81 you're going to use only raw ATM */
82
83
84 /* Do not touch these *********************************************************/
85
86 #ifdef TX_DEBUG
87 #define TXPRINTK(args...) printk(args)
88 #else
89 #define TXPRINTK(args...)
90 #endif /* TX_DEBUG */
91
92 #ifdef RX_DEBUG
93 #define RXPRINTK(args...) printk(args)
94 #else
95 #define RXPRINTK(args...)
96 #endif /* RX_DEBUG */
97
98 #ifdef GENERAL_DEBUG
99 #define PRINTK(args...) printk(args)
100 #else
101 #define PRINTK(args...)
102 #endif /* GENERAL_DEBUG */
103
104 #ifdef EXTRA_DEBUG
105 #define XPRINTK(args...) printk(args)
106 #else
107 #define XPRINTK(args...)
108 #endif /* EXTRA_DEBUG */
109
110
111 /* Macros *********************************************************************/
112
113 #define CMD_BUSY(card) (readl((card)->membase + STAT) & NS_STAT_CMDBZ)
114
115 #define NS_DELAY mdelay(1)
116
117 #define ALIGN_BUS_ADDR(addr, alignment) \
118 ((((u32) (addr)) + (((u32) (alignment)) - 1)) & ~(((u32) (alignment)) - 1))
119 #define ALIGN_ADDRESS(addr, alignment) \
120 bus_to_virt(ALIGN_BUS_ADDR(virt_to_bus(addr), alignment))
121
122 #undef CEIL
123
124 #ifndef ATM_SKB
125 #define ATM_SKB(s) (&(s)->atm)
126 #endif
127
128 /* Spinlock debugging stuff */
129 #ifdef NS_DEBUG_SPINLOCKS /* See nicstar.h */
130 #define ns_grab_int_lock(card,flags) \
131 do { \
132 unsigned long nsdsf, nsdsf2; \
133 local_irq_save(flags); \
134 save_flags(nsdsf); cli();\
135 if (nsdsf & (1<<9)) printk ("nicstar.c: ints %sabled -> enabled.\n", \
136 (flags)&(1<<9)?"en":"dis"); \
137 if (spin_is_locked(&(card)->int_lock) && \
138 (card)->cpu_int == smp_processor_id()) { \
139 printk("nicstar.c: line %d (cpu %d) int_lock already locked at line %d (cpu %d)\n", \
140 __LINE__, smp_processor_id(), (card)->has_int_lock, \
141 (card)->cpu_int); \
142 printk("nicstar.c: ints were %sabled.\n", ((flags)&(1<<9)?"en":"dis")); \
143 } \
144 if (spin_is_locked(&(card)->res_lock) && \
145 (card)->cpu_res == smp_processor_id()) { \
146 printk("nicstar.c: line %d (cpu %d) res_lock locked at line %d (cpu %d)(trying int)\n", \
147 __LINE__, smp_processor_id(), (card)->has_res_lock, \
148 (card)->cpu_res); \
149 printk("nicstar.c: ints were %sabled.\n", ((flags)&(1<<9)?"en":"dis")); \
150 } \
151 spin_lock_irq(&(card)->int_lock); \
152 (card)->has_int_lock = __LINE__; \
153 (card)->cpu_int = smp_processor_id(); \
154 restore_flags(nsdsf); } while (0)
155 #define ns_grab_res_lock(card,flags) \
156 do { \
157 unsigned long nsdsf, nsdsf2; \
158 local_irq_save(flags); \
159 save_flags(nsdsf); cli();\
160 if (nsdsf & (1<<9)) printk ("nicstar.c: ints %sabled -> enabled.\n", \
161 (flags)&(1<<9)?"en":"dis"); \
162 if (spin_is_locked(&(card)->res_lock) && \
163 (card)->cpu_res == smp_processor_id()) { \
164 printk("nicstar.c: line %d (cpu %d) res_lock already locked at line %d (cpu %d)\n", \
165 __LINE__, smp_processor_id(), (card)->has_res_lock, \
166 (card)->cpu_res); \
167 printk("nicstar.c: ints were %sabled.\n", ((flags)&(1<<9)?"en":"dis")); \
168 } \
169 spin_lock_irq(&(card)->res_lock); \
170 (card)->has_res_lock = __LINE__; \
171 (card)->cpu_res = smp_processor_id(); \
172 restore_flags(nsdsf); } while (0)
173 #define ns_grab_scq_lock(card,scq,flags) \
174 do { \
175 unsigned long nsdsf, nsdsf2; \
176 local_irq_save(flags); \
177 save_flags(nsdsf); cli();\
178 if (nsdsf & (1<<9)) printk ("nicstar.c: ints %sabled -> enabled.\n", \
179 (flags)&(1<<9)?"en":"dis"); \
180 if (spin_is_locked(&(scq)->lock) && \
181 (scq)->cpu_lock == smp_processor_id()) { \
182 printk("nicstar.c: line %d (cpu %d) this scq_lock already locked at line %d (cpu %d)\n", \
183 __LINE__, smp_processor_id(), (scq)->has_lock, \
184 (scq)->cpu_lock); \
185 printk("nicstar.c: ints were %sabled.\n", ((flags)&(1<<9)?"en":"dis")); \
186 } \
187 if (spin_is_locked(&(card)->res_lock) && \
188 (card)->cpu_res == smp_processor_id()) { \
189 printk("nicstar.c: line %d (cpu %d) res_lock locked at line %d (cpu %d)(trying scq)\n", \
190 __LINE__, smp_processor_id(), (card)->has_res_lock, \
191 (card)->cpu_res); \
192 printk("nicstar.c: ints were %sabled.\n", ((flags)&(1<<9)?"en":"dis")); \
193 } \
194 spin_lock_irq(&(scq)->lock); \
195 (scq)->has_lock = __LINE__; \
196 (scq)->cpu_lock = smp_processor_id(); \
197 restore_flags(nsdsf); } while (0)
198 #else /* !NS_DEBUG_SPINLOCKS */
199 #define ns_grab_int_lock(card,flags) \
200 spin_lock_irqsave(&(card)->int_lock,(flags))
201 #define ns_grab_res_lock(card,flags) \
202 spin_lock_irqsave(&(card)->res_lock,(flags))
203 #define ns_grab_scq_lock(card,scq,flags) \
204 spin_lock_irqsave(&(scq)->lock,flags)
205 #endif /* NS_DEBUG_SPINLOCKS */
206
207
208 /* Function declarations ******************************************************/
209
210 static u32 ns_read_sram(ns_dev *card, u32 sram_address);
211 static void ns_write_sram(ns_dev *card, u32 sram_address, u32 *value, int count);
212 static int __devinit ns_init_card(int i, struct pci_dev *pcidev);
213 static void __devinit ns_init_card_error(ns_dev *card, int error);
214 static scq_info *get_scq(int size, u32 scd);
215 static void free_scq(scq_info *scq, struct atm_vcc *vcc);
216 static void push_rxbufs(ns_dev *, struct sk_buff *);
217 static irqreturn_t ns_irq_handler(int irq, void *dev_id);
218 static int ns_open(struct atm_vcc *vcc);
219 static void ns_close(struct atm_vcc *vcc);
220 static void fill_tst(ns_dev *card, int n, vc_map *vc);
221 static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb);
222 static int push_scqe(ns_dev *card, vc_map *vc, scq_info *scq, ns_scqe *tbd,
223 struct sk_buff *skb);
224 static void process_tsq(ns_dev *card);
225 static void drain_scq(ns_dev *card, scq_info *scq, int pos);
226 static void process_rsq(ns_dev *card);
227 static void dequeue_rx(ns_dev *card, ns_rsqe *rsqe);
228 #ifdef NS_USE_DESTRUCTORS
229 static void ns_sb_destructor(struct sk_buff *sb);
230 static void ns_lb_destructor(struct sk_buff *lb);
231 static void ns_hb_destructor(struct sk_buff *hb);
232 #endif /* NS_USE_DESTRUCTORS */
233 static void recycle_rx_buf(ns_dev *card, struct sk_buff *skb);
234 static void recycle_iovec_rx_bufs(ns_dev *card, struct iovec *iov, int count);
235 static void recycle_iov_buf(ns_dev *card, struct sk_buff *iovb);
236 static void dequeue_sm_buf(ns_dev *card, struct sk_buff *sb);
237 static void dequeue_lg_buf(ns_dev *card, struct sk_buff *lb);
238 static int ns_proc_read(struct atm_dev *dev, loff_t *pos, char *page);
239 static int ns_ioctl(struct atm_dev *dev, unsigned int cmd, void __user *arg);
240 static void which_list(ns_dev *card, struct sk_buff *skb);
241 static void ns_poll(unsigned long arg);
242 static int ns_parse_mac(char *mac, unsigned char *esi);
243 static short ns_h2i(char c);
244 static void ns_phy_put(struct atm_dev *dev, unsigned char value,
245 unsigned long addr);
246 static unsigned char ns_phy_get(struct atm_dev *dev, unsigned long addr);
247
248
249
250 /* Global variables ***********************************************************/
251
252 static struct ns_dev *cards[NS_MAX_CARDS];
253 static unsigned num_cards;
254 static struct atmdev_ops atm_ops =
255 {
256 .open = ns_open,
257 .close = ns_close,
258 .ioctl = ns_ioctl,
259 .send = ns_send,
260 .phy_put = ns_phy_put,
261 .phy_get = ns_phy_get,
262 .proc_read = ns_proc_read,
263 .owner = THIS_MODULE,
264 };
265 static struct timer_list ns_timer;
266 static char *mac[NS_MAX_CARDS];
267 module_param_array(mac, charp, NULL, 0);
268 MODULE_LICENSE("GPL");
269
270
271 /* Functions*******************************************************************/
272
273 static int __devinit nicstar_init_one(struct pci_dev *pcidev,
274 const struct pci_device_id *ent)
275 {
276 static int index = -1;
277 unsigned int error;
278
279 index++;
280 cards[index] = NULL;
281
282 error = ns_init_card(index, pcidev);
283 if (error) {
284 cards[index--] = NULL; /* don't increment index */
285 goto err_out;
286 }
287
288 return 0;
289 err_out:
290 return -ENODEV;
291 }
292
293
294
295 static void __devexit nicstar_remove_one(struct pci_dev *pcidev)
296 {
297 int i, j;
298 ns_dev *card = pci_get_drvdata(pcidev);
299 struct sk_buff *hb;
300 struct sk_buff *iovb;
301 struct sk_buff *lb;
302 struct sk_buff *sb;
303
304 i = card->index;
305
306 if (cards[i] == NULL)
307 return;
308
309 if (card->atmdev->phy && card->atmdev->phy->stop)
310 card->atmdev->phy->stop(card->atmdev);
311
312 /* Stop everything */
313 writel(0x00000000, card->membase + CFG);
314
315 /* De-register device */
316 atm_dev_deregister(card->atmdev);
317
318 /* Disable PCI device */
319 pci_disable_device(pcidev);
320
321 /* Free up resources */
322 j = 0;
323 PRINTK("nicstar%d: freeing %d huge buffers.\n", i, card->hbpool.count);
324 while ((hb = skb_dequeue(&card->hbpool.queue)) != NULL)
325 {
326 dev_kfree_skb_any(hb);
327 j++;
328 }
329 PRINTK("nicstar%d: %d huge buffers freed.\n", i, j);
330 j = 0;
331 PRINTK("nicstar%d: freeing %d iovec buffers.\n", i, card->iovpool.count);
332 while ((iovb = skb_dequeue(&card->iovpool.queue)) != NULL)
333 {
334 dev_kfree_skb_any(iovb);
335 j++;
336 }
337 PRINTK("nicstar%d: %d iovec buffers freed.\n", i, j);
338 while ((lb = skb_dequeue(&card->lbpool.queue)) != NULL)
339 dev_kfree_skb_any(lb);
340 while ((sb = skb_dequeue(&card->sbpool.queue)) != NULL)
341 dev_kfree_skb_any(sb);
342 free_scq(card->scq0, NULL);
343 for (j = 0; j < NS_FRSCD_NUM; j++)
344 {
345 if (card->scd2vc[j] != NULL)
346 free_scq(card->scd2vc[j]->scq, card->scd2vc[j]->tx_vcc);
347 }
348 kfree(card->rsq.org);
349 kfree(card->tsq.org);
350 free_irq(card->pcidev->irq, card);
351 iounmap(card->membase);
352 kfree(card);
353 }
354
355
356
357 static struct pci_device_id nicstar_pci_tbl[] __devinitdata =
358 {
359 {PCI_VENDOR_ID_IDT, PCI_DEVICE_ID_IDT_IDT77201,
360 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
361 {0,} /* terminate list */
362 };
363 MODULE_DEVICE_TABLE(pci, nicstar_pci_tbl);
364
365
366
367 static struct pci_driver nicstar_driver = {
368 .name = "nicstar",
369 .id_table = nicstar_pci_tbl,
370 .probe = nicstar_init_one,
371 .remove = __devexit_p(nicstar_remove_one),
372 };
373
374
375
376 static int __init nicstar_init(void)
377 {
378 unsigned error = 0; /* Initialized to remove compile warning */
379
380 XPRINTK("nicstar: nicstar_init() called.\n");
381
382 error = pci_register_driver(&nicstar_driver);
383
384 TXPRINTK("nicstar: TX debug enabled.\n");
385 RXPRINTK("nicstar: RX debug enabled.\n");
386 PRINTK("nicstar: General debug enabled.\n");
387 #ifdef PHY_LOOPBACK
388 printk("nicstar: using PHY loopback.\n");
389 #endif /* PHY_LOOPBACK */
390 XPRINTK("nicstar: nicstar_init() returned.\n");
391
392 if (!error) {
393 init_timer(&ns_timer);
394 ns_timer.expires = jiffies + NS_POLL_PERIOD;
395 ns_timer.data = 0UL;
396 ns_timer.function = ns_poll;
397 add_timer(&ns_timer);
398 }
399
400 return error;
401 }
402
403
404
405 static void __exit nicstar_cleanup(void)
406 {
407 XPRINTK("nicstar: nicstar_cleanup() called.\n");
408
409 del_timer(&ns_timer);
410
411 pci_unregister_driver(&nicstar_driver);
412
413 XPRINTK("nicstar: nicstar_cleanup() returned.\n");
414 }
415
416
417
418 static u32 ns_read_sram(ns_dev *card, u32 sram_address)
419 {
420 unsigned long flags;
421 u32 data;
422 sram_address <<= 2;
423 sram_address &= 0x0007FFFC; /* address must be dword aligned */
424 sram_address |= 0x50000000; /* SRAM read command */
425 ns_grab_res_lock(card, flags);
426 while (CMD_BUSY(card));
427 writel(sram_address, card->membase + CMD);
428 while (CMD_BUSY(card));
429 data = readl(card->membase + DR0);
430 spin_unlock_irqrestore(&card->res_lock, flags);
431 return data;
432 }
433
434
435
436 static void ns_write_sram(ns_dev *card, u32 sram_address, u32 *value, int count)
437 {
438 unsigned long flags;
439 int i, c;
440 count--; /* count range now is 0..3 instead of 1..4 */
441 c = count;
442 c <<= 2; /* to use increments of 4 */
443 ns_grab_res_lock(card, flags);
444 while (CMD_BUSY(card));
445 for (i = 0; i <= c; i += 4)
446 writel(*(value++), card->membase + i);
447 /* Note: DR# registers are the first 4 dwords in nicstar's memspace,
448 so card->membase + DR0 == card->membase */
449 sram_address <<= 2;
450 sram_address &= 0x0007FFFC;
451 sram_address |= (0x40000000 | count);
452 writel(sram_address, card->membase + CMD);
453 spin_unlock_irqrestore(&card->res_lock, flags);
454 }
455
456
457 static int __devinit ns_init_card(int i, struct pci_dev *pcidev)
458 {
459 int j;
460 struct ns_dev *card = NULL;
461 unsigned char pci_latency;
462 unsigned error;
463 u32 data;
464 u32 u32d[4];
465 u32 ns_cfg_rctsize;
466 int bcount;
467 unsigned long membase;
468
469 error = 0;
470
471 if (pci_enable_device(pcidev))
472 {
473 printk("nicstar%d: can't enable PCI device\n", i);
474 error = 2;
475 ns_init_card_error(card, error);
476 return error;
477 }
478
479 if ((card = kmalloc(sizeof(ns_dev), GFP_KERNEL)) == NULL)
480 {
481 printk("nicstar%d: can't allocate memory for device structure.\n", i);
482 error = 2;
483 ns_init_card_error(card, error);
484 return error;
485 }
486 cards[i] = card;
487 spin_lock_init(&card->int_lock);
488 spin_lock_init(&card->res_lock);
489
490 pci_set_drvdata(pcidev, card);
491
492 card->index = i;
493 card->atmdev = NULL;
494 card->pcidev = pcidev;
495 membase = pci_resource_start(pcidev, 1);
496 card->membase = ioremap(membase, NS_IOREMAP_SIZE);
497 if (card->membase == 0)
498 {
499 printk("nicstar%d: can't ioremap() membase.\n",i);
500 error = 3;
501 ns_init_card_error(card, error);
502 return error;
503 }
504 PRINTK("nicstar%d: membase at 0x%x.\n", i, card->membase);
505
506 pci_set_master(pcidev);
507
508 if (pci_read_config_byte(pcidev, PCI_LATENCY_TIMER, &pci_latency) != 0)
509 {
510 printk("nicstar%d: can't read PCI latency timer.\n", i);
511 error = 6;
512 ns_init_card_error(card, error);
513 return error;
514 }
515 #ifdef NS_PCI_LATENCY
516 if (pci_latency < NS_PCI_LATENCY)
517 {
518 PRINTK("nicstar%d: setting PCI latency timer to %d.\n", i, NS_PCI_LATENCY);
519 for (j = 1; j < 4; j++)
520 {
521 if (pci_write_config_byte(pcidev, PCI_LATENCY_TIMER, NS_PCI_LATENCY) != 0)
522 break;
523 }
524 if (j == 4)
525 {
526 printk("nicstar%d: can't set PCI latency timer to %d.\n", i, NS_PCI_LATENCY);
527 error = 7;
528 ns_init_card_error(card, error);
529 return error;
530 }
531 }
532 #endif /* NS_PCI_LATENCY */
533
534 /* Clear timer overflow */
535 data = readl(card->membase + STAT);
536 if (data & NS_STAT_TMROF)
537 writel(NS_STAT_TMROF, card->membase + STAT);
538
539 /* Software reset */
540 writel(NS_CFG_SWRST, card->membase + CFG);
541 NS_DELAY;
542 writel(0x00000000, card->membase + CFG);
543
544 /* PHY reset */
545 writel(0x00000008, card->membase + GP);
546 NS_DELAY;
547 writel(0x00000001, card->membase + GP);
548 NS_DELAY;
549 while (CMD_BUSY(card));
550 writel(NS_CMD_WRITE_UTILITY | 0x00000100, card->membase + CMD); /* Sync UTOPIA with SAR clock */
551 NS_DELAY;
552
553 /* Detect PHY type */
554 while (CMD_BUSY(card));
555 writel(NS_CMD_READ_UTILITY | 0x00000200, card->membase + CMD);
556 while (CMD_BUSY(card));
557 data = readl(card->membase + DR0);
558 switch(data) {
559 case 0x00000009:
560 printk("nicstar%d: PHY seems to be 25 Mbps.\n", i);
561 card->max_pcr = ATM_25_PCR;
562 while(CMD_BUSY(card));
563 writel(0x00000008, card->membase + DR0);
564 writel(NS_CMD_WRITE_UTILITY | 0x00000200, card->membase + CMD);
565 /* Clear an eventual pending interrupt */
566 writel(NS_STAT_SFBQF, card->membase + STAT);
567 #ifdef PHY_LOOPBACK
568 while(CMD_BUSY(card));
569 writel(0x00000022, card->membase + DR0);
570 writel(NS_CMD_WRITE_UTILITY | 0x00000202, card->membase + CMD);
571 #endif /* PHY_LOOPBACK */
572 break;
573 case 0x00000030:
574 case 0x00000031:
575 printk("nicstar%d: PHY seems to be 155 Mbps.\n", i);
576 card->max_pcr = ATM_OC3_PCR;
577 #ifdef PHY_LOOPBACK
578 while(CMD_BUSY(card));
579 writel(0x00000002, card->membase + DR0);
580 writel(NS_CMD_WRITE_UTILITY | 0x00000205, card->membase + CMD);
581 #endif /* PHY_LOOPBACK */
582 break;
583 default:
584 printk("nicstar%d: unknown PHY type (0x%08X).\n", i, data);
585 error = 8;
586 ns_init_card_error(card, error);
587 return error;
588 }
589 writel(0x00000000, card->membase + GP);
590
591 /* Determine SRAM size */
592 data = 0x76543210;
593 ns_write_sram(card, 0x1C003, &data, 1);
594 data = 0x89ABCDEF;
595 ns_write_sram(card, 0x14003, &data, 1);
596 if (ns_read_sram(card, 0x14003) == 0x89ABCDEF &&
597 ns_read_sram(card, 0x1C003) == 0x76543210)
598 card->sram_size = 128;
599 else
600 card->sram_size = 32;
601 PRINTK("nicstar%d: %dK x 32bit SRAM size.\n", i, card->sram_size);
602
603 card->rct_size = NS_MAX_RCTSIZE;
604
605 #if (NS_MAX_RCTSIZE == 4096)
606 if (card->sram_size == 128)
607 printk("nicstar%d: limiting maximum VCI. See NS_MAX_RCTSIZE in nicstar.h\n", i);
608 #elif (NS_MAX_RCTSIZE == 16384)
609 if (card->sram_size == 32)
610 {
611 printk("nicstar%d: wasting memory. See NS_MAX_RCTSIZE in nicstar.h\n", i);
612 card->rct_size = 4096;
613 }
614 #else
615 #error NS_MAX_RCTSIZE must be either 4096 or 16384 in nicstar.c
616 #endif
617
618 card->vpibits = NS_VPIBITS;
619 if (card->rct_size == 4096)
620 card->vcibits = 12 - NS_VPIBITS;
621 else /* card->rct_size == 16384 */
622 card->vcibits = 14 - NS_VPIBITS;
623
624 /* Initialize the nicstar eeprom/eprom stuff, for the MAC addr */
625 if (mac[i] == NULL)
626 nicstar_init_eprom(card->membase);
627
628 /* Set the VPI/VCI MSb mask to zero so we can receive OAM cells */
629 writel(0x00000000, card->membase + VPM);
630
631 /* Initialize TSQ */
632 card->tsq.org = kmalloc(NS_TSQSIZE + NS_TSQ_ALIGNMENT, GFP_KERNEL);
633 if (card->tsq.org == NULL)
634 {
635 printk("nicstar%d: can't allocate TSQ.\n", i);
636 error = 10;
637 ns_init_card_error(card, error);
638 return error;
639 }
640 card->tsq.base = (ns_tsi *) ALIGN_ADDRESS(card->tsq.org, NS_TSQ_ALIGNMENT);
641 card->tsq.next = card->tsq.base;
642 card->tsq.last = card->tsq.base + (NS_TSQ_NUM_ENTRIES - 1);
643 for (j = 0; j < NS_TSQ_NUM_ENTRIES; j++)
644 ns_tsi_init(card->tsq.base + j);
645 writel(0x00000000, card->membase + TSQH);
646 writel((u32) virt_to_bus(card->tsq.base), card->membase + TSQB);
647 PRINTK("nicstar%d: TSQ base at 0x%x 0x%x 0x%x.\n", i, (u32) card->tsq.base,
648 (u32) virt_to_bus(card->tsq.base), readl(card->membase + TSQB));
649
650 /* Initialize RSQ */
651 card->rsq.org = kmalloc(NS_RSQSIZE + NS_RSQ_ALIGNMENT, GFP_KERNEL);
652 if (card->rsq.org == NULL)
653 {
654 printk("nicstar%d: can't allocate RSQ.\n", i);
655 error = 11;
656 ns_init_card_error(card, error);
657 return error;
658 }
659 card->rsq.base = (ns_rsqe *) ALIGN_ADDRESS(card->rsq.org, NS_RSQ_ALIGNMENT);
660 card->rsq.next = card->rsq.base;
661 card->rsq.last = card->rsq.base + (NS_RSQ_NUM_ENTRIES - 1);
662 for (j = 0; j < NS_RSQ_NUM_ENTRIES; j++)
663 ns_rsqe_init(card->rsq.base + j);
664 writel(0x00000000, card->membase + RSQH);
665 writel((u32) virt_to_bus(card->rsq.base), card->membase + RSQB);
666 PRINTK("nicstar%d: RSQ base at 0x%x.\n", i, (u32) card->rsq.base);
667
668 /* Initialize SCQ0, the only VBR SCQ used */
669 card->scq1 = NULL;
670 card->scq2 = NULL;
671 card->scq0 = get_scq(VBR_SCQSIZE, NS_VRSCD0);
672 if (card->scq0 == NULL)
673 {
674 printk("nicstar%d: can't get SCQ0.\n", i);
675 error = 12;
676 ns_init_card_error(card, error);
677 return error;
678 }
679 u32d[0] = (u32) virt_to_bus(card->scq0->base);
680 u32d[1] = (u32) 0x00000000;
681 u32d[2] = (u32) 0xffffffff;
682 u32d[3] = (u32) 0x00000000;
683 ns_write_sram(card, NS_VRSCD0, u32d, 4);
684 ns_write_sram(card, NS_VRSCD1, u32d, 4); /* These last two won't be used */
685 ns_write_sram(card, NS_VRSCD2, u32d, 4); /* but are initialized, just in case... */
686 card->scq0->scd = NS_VRSCD0;
687 PRINTK("nicstar%d: VBR-SCQ0 base at 0x%x.\n", i, (u32) card->scq0->base);
688
689 /* Initialize TSTs */
690 card->tst_addr = NS_TST0;
691 card->tst_free_entries = NS_TST_NUM_ENTRIES;
692 data = NS_TST_OPCODE_VARIABLE;
693 for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
694 ns_write_sram(card, NS_TST0 + j, &data, 1);
695 data = ns_tste_make(NS_TST_OPCODE_END, NS_TST0);
696 ns_write_sram(card, NS_TST0 + NS_TST_NUM_ENTRIES, &data, 1);
697 for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
698 ns_write_sram(card, NS_TST1 + j, &data, 1);
699 data = ns_tste_make(NS_TST_OPCODE_END, NS_TST1);
700 ns_write_sram(card, NS_TST1 + NS_TST_NUM_ENTRIES, &data, 1);
701 for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
702 card->tste2vc[j] = NULL;
703 writel(NS_TST0 << 2, card->membase + TSTB);
704
705
706 /* Initialize RCT. AAL type is set on opening the VC. */
707 #ifdef RCQ_SUPPORT
708 u32d[0] = NS_RCTE_RAWCELLINTEN;
709 #else
710 u32d[0] = 0x00000000;
711 #endif /* RCQ_SUPPORT */
712 u32d[1] = 0x00000000;
713 u32d[2] = 0x00000000;
714 u32d[3] = 0xFFFFFFFF;
715 for (j = 0; j < card->rct_size; j++)
716 ns_write_sram(card, j * 4, u32d, 4);
717
718 memset(card->vcmap, 0, NS_MAX_RCTSIZE * sizeof(vc_map));
719
720 for (j = 0; j < NS_FRSCD_NUM; j++)
721 card->scd2vc[j] = NULL;
722
723 /* Initialize buffer levels */
724 card->sbnr.min = MIN_SB;
725 card->sbnr.init = NUM_SB;
726 card->sbnr.max = MAX_SB;
727 card->lbnr.min = MIN_LB;
728 card->lbnr.init = NUM_LB;
729 card->lbnr.max = MAX_LB;
730 card->iovnr.min = MIN_IOVB;
731 card->iovnr.init = NUM_IOVB;
732 card->iovnr.max = MAX_IOVB;
733 card->hbnr.min = MIN_HB;
734 card->hbnr.init = NUM_HB;
735 card->hbnr.max = MAX_HB;
736
737 card->sm_handle = 0x00000000;
738 card->sm_addr = 0x00000000;
739 card->lg_handle = 0x00000000;
740 card->lg_addr = 0x00000000;
741
742 card->efbie = 1; /* To prevent push_rxbufs from enabling the interrupt */
743
744 /* Pre-allocate some huge buffers */
745 skb_queue_head_init(&card->hbpool.queue);
746 card->hbpool.count = 0;
747 for (j = 0; j < NUM_HB; j++)
748 {
749 struct sk_buff *hb;
750 hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
751 if (hb == NULL)
752 {
753 printk("nicstar%d: can't allocate %dth of %d huge buffers.\n",
754 i, j, NUM_HB);
755 error = 13;
756 ns_init_card_error(card, error);
757 return error;
758 }
759 NS_SKB_CB(hb)->buf_type = BUF_NONE;
760 skb_queue_tail(&card->hbpool.queue, hb);
761 card->hbpool.count++;
762 }
763
764
765 /* Allocate large buffers */
766 skb_queue_head_init(&card->lbpool.queue);
767 card->lbpool.count = 0; /* Not used */
768 for (j = 0; j < NUM_LB; j++)
769 {
770 struct sk_buff *lb;
771 lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
772 if (lb == NULL)
773 {
774 printk("nicstar%d: can't allocate %dth of %d large buffers.\n",
775 i, j, NUM_LB);
776 error = 14;
777 ns_init_card_error(card, error);
778 return error;
779 }
780 NS_SKB_CB(lb)->buf_type = BUF_LG;
781 skb_queue_tail(&card->lbpool.queue, lb);
782 skb_reserve(lb, NS_SMBUFSIZE);
783 push_rxbufs(card, lb);
784 /* Due to the implementation of push_rxbufs() this is 1, not 0 */
785 if (j == 1)
786 {
787 card->rcbuf = lb;
788 card->rawch = (u32) virt_to_bus(lb->data);
789 }
790 }
791 /* Test for strange behaviour which leads to crashes */
792 if ((bcount = ns_stat_lfbqc_get(readl(card->membase + STAT))) < card->lbnr.min)
793 {
794 printk("nicstar%d: Strange... Just allocated %d large buffers and lfbqc = %d.\n",
795 i, j, bcount);
796 error = 14;
797 ns_init_card_error(card, error);
798 return error;
799 }
800
801
802 /* Allocate small buffers */
803 skb_queue_head_init(&card->sbpool.queue);
804 card->sbpool.count = 0; /* Not used */
805 for (j = 0; j < NUM_SB; j++)
806 {
807 struct sk_buff *sb;
808 sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
809 if (sb == NULL)
810 {
811 printk("nicstar%d: can't allocate %dth of %d small buffers.\n",
812 i, j, NUM_SB);
813 error = 15;
814 ns_init_card_error(card, error);
815 return error;
816 }
817 NS_SKB_CB(sb)->buf_type = BUF_SM;
818 skb_queue_tail(&card->sbpool.queue, sb);
819 skb_reserve(sb, NS_AAL0_HEADER);
820 push_rxbufs(card, sb);
821 }
822 /* Test for strange behaviour which leads to crashes */
823 if ((bcount = ns_stat_sfbqc_get(readl(card->membase + STAT))) < card->sbnr.min)
824 {
825 printk("nicstar%d: Strange... Just allocated %d small buffers and sfbqc = %d.\n",
826 i, j, bcount);
827 error = 15;
828 ns_init_card_error(card, error);
829 return error;
830 }
831
832
833 /* Allocate iovec buffers */
834 skb_queue_head_init(&card->iovpool.queue);
835 card->iovpool.count = 0;
836 for (j = 0; j < NUM_IOVB; j++)
837 {
838 struct sk_buff *iovb;
839 iovb = alloc_skb(NS_IOVBUFSIZE, GFP_KERNEL);
840 if (iovb == NULL)
841 {
842 printk("nicstar%d: can't allocate %dth of %d iovec buffers.\n",
843 i, j, NUM_IOVB);
844 error = 16;
845 ns_init_card_error(card, error);
846 return error;
847 }
848 NS_SKB_CB(iovb)->buf_type = BUF_NONE;
849 skb_queue_tail(&card->iovpool.queue, iovb);
850 card->iovpool.count++;
851 }
852
853 /* Configure NICStAR */
854 if (card->rct_size == 4096)
855 ns_cfg_rctsize = NS_CFG_RCTSIZE_4096_ENTRIES;
856 else /* (card->rct_size == 16384) */
857 ns_cfg_rctsize = NS_CFG_RCTSIZE_16384_ENTRIES;
858
859 card->efbie = 1;
860
861 card->intcnt = 0;
862 if (request_irq(pcidev->irq, &ns_irq_handler, IRQF_DISABLED | IRQF_SHARED, "nicstar", card) != 0)
863 {
864 printk("nicstar%d: can't allocate IRQ %d.\n", i, pcidev->irq);
865 error = 9;
866 ns_init_card_error(card, error);
867 return error;
868 }
869
870 /* Register device */
871 card->atmdev = atm_dev_register("nicstar", &atm_ops, -1, NULL);
872 if (card->atmdev == NULL)
873 {
874 printk("nicstar%d: can't register device.\n", i);
875 error = 17;
876 ns_init_card_error(card, error);
877 return error;
878 }
879
880 if (ns_parse_mac(mac[i], card->atmdev->esi)) {
881 nicstar_read_eprom(card->membase, NICSTAR_EPROM_MAC_ADDR_OFFSET,
882 card->atmdev->esi, 6);
883 if (memcmp(card->atmdev->esi, "\x00\x00\x00\x00\x00\x00", 6) == 0) {
884 nicstar_read_eprom(card->membase, NICSTAR_EPROM_MAC_ADDR_OFFSET_ALT,
885 card->atmdev->esi, 6);
886 }
887 }
888
889 printk("nicstar%d: MAC address %02X:%02X:%02X:%02X:%02X:%02X\n", i,
890 card->atmdev->esi[0], card->atmdev->esi[1], card->atmdev->esi[2],
891 card->atmdev->esi[3], card->atmdev->esi[4], card->atmdev->esi[5]);
892
893 card->atmdev->dev_data = card;
894 card->atmdev->ci_range.vpi_bits = card->vpibits;
895 card->atmdev->ci_range.vci_bits = card->vcibits;
896 card->atmdev->link_rate = card->max_pcr;
897 card->atmdev->phy = NULL;
898
899 #ifdef CONFIG_ATM_NICSTAR_USE_SUNI
900 if (card->max_pcr == ATM_OC3_PCR)
901 suni_init(card->atmdev);
902 #endif /* CONFIG_ATM_NICSTAR_USE_SUNI */
903
904 #ifdef CONFIG_ATM_NICSTAR_USE_IDT77105
905 if (card->max_pcr == ATM_25_PCR)
906 idt77105_init(card->atmdev);
907 #endif /* CONFIG_ATM_NICSTAR_USE_IDT77105 */
908
909 if (card->atmdev->phy && card->atmdev->phy->start)
910 card->atmdev->phy->start(card->atmdev);
911
912 writel(NS_CFG_RXPATH |
913 NS_CFG_SMBUFSIZE |
914 NS_CFG_LGBUFSIZE |
915 NS_CFG_EFBIE |
916 NS_CFG_RSQSIZE |
917 NS_CFG_VPIBITS |
918 ns_cfg_rctsize |
919 NS_CFG_RXINT_NODELAY |
920 NS_CFG_RAWIE | /* Only enabled if RCQ_SUPPORT */
921 NS_CFG_RSQAFIE |
922 NS_CFG_TXEN |
923 NS_CFG_TXIE |
924 NS_CFG_TSQFIE_OPT | /* Only enabled if ENABLE_TSQFIE */
925 NS_CFG_PHYIE,
926 card->membase + CFG);
927
928 num_cards++;
929
930 return error;
931 }
932
933
934
935 static void __devinit ns_init_card_error(ns_dev *card, int error)
936 {
937 if (error >= 17)
938 {
939 writel(0x00000000, card->membase + CFG);
940 }
941 if (error >= 16)
942 {
943 struct sk_buff *iovb;
944 while ((iovb = skb_dequeue(&card->iovpool.queue)) != NULL)
945 dev_kfree_skb_any(iovb);
946 }
947 if (error >= 15)
948 {
949 struct sk_buff *sb;
950 while ((sb = skb_dequeue(&card->sbpool.queue)) != NULL)
951 dev_kfree_skb_any(sb);
952 free_scq(card->scq0, NULL);
953 }
954 if (error >= 14)
955 {
956 struct sk_buff *lb;
957 while ((lb = skb_dequeue(&card->lbpool.queue)) != NULL)
958 dev_kfree_skb_any(lb);
959 }
960 if (error >= 13)
961 {
962 struct sk_buff *hb;
963 while ((hb = skb_dequeue(&card->hbpool.queue)) != NULL)
964 dev_kfree_skb_any(hb);
965 }
966 if (error >= 12)
967 {
968 kfree(card->rsq.org);
969 }
970 if (error >= 11)
971 {
972 kfree(card->tsq.org);
973 }
974 if (error >= 10)
975 {
976 free_irq(card->pcidev->irq, card);
977 }
978 if (error >= 4)
979 {
980 iounmap(card->membase);
981 }
982 if (error >= 3)
983 {
984 pci_disable_device(card->pcidev);
985 kfree(card);
986 }
987 }
988
989
990
991 static scq_info *get_scq(int size, u32 scd)
992 {
993 scq_info *scq;
994 int i;
995
996 if (size != VBR_SCQSIZE && size != CBR_SCQSIZE)
997 return NULL;
998
999 scq = kmalloc(sizeof(scq_info), GFP_KERNEL);
1000 if (scq == NULL)
1001 return NULL;
1002 scq->org = kmalloc(2 * size, GFP_KERNEL);
1003 if (scq->org == NULL)
1004 {
1005 kfree(scq);
1006 return NULL;
1007 }
1008 scq->skb = kmalloc(sizeof(struct sk_buff *) *
1009 (size / NS_SCQE_SIZE), GFP_KERNEL);
1010 if (scq->skb == NULL)
1011 {
1012 kfree(scq->org);
1013 kfree(scq);
1014 return NULL;
1015 }
1016 scq->num_entries = size / NS_SCQE_SIZE;
1017 scq->base = (ns_scqe *) ALIGN_ADDRESS(scq->org, size);
1018 scq->next = scq->base;
1019 scq->last = scq->base + (scq->num_entries - 1);
1020 scq->tail = scq->last;
1021 scq->scd = scd;
1022 scq->num_entries = size / NS_SCQE_SIZE;
1023 scq->tbd_count = 0;
1024 init_waitqueue_head(&scq->scqfull_waitq);
1025 scq->full = 0;
1026 spin_lock_init(&scq->lock);
1027
1028 for (i = 0; i < scq->num_entries; i++)
1029 scq->skb[i] = NULL;
1030
1031 return scq;
1032 }
1033
1034
1035
1036 /* For variable rate SCQ vcc must be NULL */
1037 static void free_scq(scq_info *scq, struct atm_vcc *vcc)
1038 {
1039 int i;
1040
1041 if (scq->num_entries == VBR_SCQ_NUM_ENTRIES)
1042 for (i = 0; i < scq->num_entries; i++)
1043 {
1044 if (scq->skb[i] != NULL)
1045 {
1046 vcc = ATM_SKB(scq->skb[i])->vcc;
1047 if (vcc->pop != NULL)
1048 vcc->pop(vcc, scq->skb[i]);
1049 else
1050 dev_kfree_skb_any(scq->skb[i]);
1051 }
1052 }
1053 else /* vcc must be != NULL */
1054 {
1055 if (vcc == NULL)
1056 {
1057 printk("nicstar: free_scq() called with vcc == NULL for fixed rate scq.");
1058 for (i = 0; i < scq->num_entries; i++)
1059 dev_kfree_skb_any(scq->skb[i]);
1060 }
1061 else
1062 for (i = 0; i < scq->num_entries; i++)
1063 {
1064 if (scq->skb[i] != NULL)
1065 {
1066 if (vcc->pop != NULL)
1067 vcc->pop(vcc, scq->skb[i]);
1068 else
1069 dev_kfree_skb_any(scq->skb[i]);
1070 }
1071 }
1072 }
1073 kfree(scq->skb);
1074 kfree(scq->org);
1075 kfree(scq);
1076 }
1077
1078
1079
1080 /* The handles passed must be pointers to the sk_buff containing the small
1081 or large buffer(s) cast to u32. */
1082 static void push_rxbufs(ns_dev *card, struct sk_buff *skb)
1083 {
1084 struct ns_skb_cb *cb = NS_SKB_CB(skb);
1085 u32 handle1, addr1;
1086 u32 handle2, addr2;
1087 u32 stat;
1088 unsigned long flags;
1089
1090 /* *BARF* */
1091 handle2 = addr2 = 0;
1092 handle1 = (u32)skb;
1093 addr1 = (u32)virt_to_bus(skb->data);
1094
1095 #ifdef GENERAL_DEBUG
1096 if (!addr1)
1097 printk("nicstar%d: push_rxbufs called with addr1 = 0.\n", card->index);
1098 #endif /* GENERAL_DEBUG */
1099
1100 stat = readl(card->membase + STAT);
1101 card->sbfqc = ns_stat_sfbqc_get(stat);
1102 card->lbfqc = ns_stat_lfbqc_get(stat);
1103 if (cb->buf_type == BUF_SM)
1104 {
1105 if (!addr2)
1106 {
1107 if (card->sm_addr)
1108 {
1109 addr2 = card->sm_addr;
1110 handle2 = card->sm_handle;
1111 card->sm_addr = 0x00000000;
1112 card->sm_handle = 0x00000000;
1113 }
1114 else /* (!sm_addr) */
1115 {
1116 card->sm_addr = addr1;
1117 card->sm_handle = handle1;
1118 }
1119 }
1120 }
1121 else /* buf_type == BUF_LG */
1122 {
1123 if (!addr2)
1124 {
1125 if (card->lg_addr)
1126 {
1127 addr2 = card->lg_addr;
1128 handle2 = card->lg_handle;
1129 card->lg_addr = 0x00000000;
1130 card->lg_handle = 0x00000000;
1131 }
1132 else /* (!lg_addr) */
1133 {
1134 card->lg_addr = addr1;
1135 card->lg_handle = handle1;
1136 }
1137 }
1138 }
1139
1140 if (addr2)
1141 {
1142 if (cb->buf_type == BUF_SM)
1143 {
1144 if (card->sbfqc >= card->sbnr.max)
1145 {
1146 skb_unlink((struct sk_buff *) handle1, &card->sbpool.queue);
1147 dev_kfree_skb_any((struct sk_buff *) handle1);
1148 skb_unlink((struct sk_buff *) handle2, &card->sbpool.queue);
1149 dev_kfree_skb_any((struct sk_buff *) handle2);
1150 return;
1151 }
1152 else
1153 card->sbfqc += 2;
1154 }
1155 else /* (buf_type == BUF_LG) */
1156 {
1157 if (card->lbfqc >= card->lbnr.max)
1158 {
1159 skb_unlink((struct sk_buff *) handle1, &card->lbpool.queue);
1160 dev_kfree_skb_any((struct sk_buff *) handle1);
1161 skb_unlink((struct sk_buff *) handle2, &card->lbpool.queue);
1162 dev_kfree_skb_any((struct sk_buff *) handle2);
1163 return;
1164 }
1165 else
1166 card->lbfqc += 2;
1167 }
1168
1169 ns_grab_res_lock(card, flags);
1170
1171 while (CMD_BUSY(card));
1172 writel(addr2, card->membase + DR3);
1173 writel(handle2, card->membase + DR2);
1174 writel(addr1, card->membase + DR1);
1175 writel(handle1, card->membase + DR0);
1176 writel(NS_CMD_WRITE_FREEBUFQ | cb->buf_type, card->membase + CMD);
1177
1178 spin_unlock_irqrestore(&card->res_lock, flags);
1179
1180 XPRINTK("nicstar%d: Pushing %s buffers at 0x%x and 0x%x.\n", card->index,
1181 (cb->buf_type == BUF_SM ? "small" : "large"), addr1, addr2);
1182 }
1183
1184 if (!card->efbie && card->sbfqc >= card->sbnr.min &&
1185 card->lbfqc >= card->lbnr.min)
1186 {
1187 card->efbie = 1;
1188 writel((readl(card->membase + CFG) | NS_CFG_EFBIE), card->membase + CFG);
1189 }
1190
1191 return;
1192 }
1193
1194
1195
1196 static irqreturn_t ns_irq_handler(int irq, void *dev_id)
1197 {
1198 u32 stat_r;
1199 ns_dev *card;
1200 struct atm_dev *dev;
1201 unsigned long flags;
1202
1203 card = (ns_dev *) dev_id;
1204 dev = card->atmdev;
1205 card->intcnt++;
1206
1207 PRINTK("nicstar%d: NICStAR generated an interrupt\n", card->index);
1208
1209 ns_grab_int_lock(card, flags);
1210
1211 stat_r = readl(card->membase + STAT);
1212
1213 /* Transmit Status Indicator has been written to T. S. Queue */
1214 if (stat_r & NS_STAT_TSIF)
1215 {
1216 TXPRINTK("nicstar%d: TSI interrupt\n", card->index);
1217 process_tsq(card);
1218 writel(NS_STAT_TSIF, card->membase + STAT);
1219 }
1220
1221 /* Incomplete CS-PDU has been transmitted */
1222 if (stat_r & NS_STAT_TXICP)
1223 {
1224 writel(NS_STAT_TXICP, card->membase + STAT);
1225 TXPRINTK("nicstar%d: Incomplete CS-PDU transmitted.\n",
1226 card->index);
1227 }
1228
1229 /* Transmit Status Queue 7/8 full */
1230 if (stat_r & NS_STAT_TSQF)
1231 {
1232 writel(NS_STAT_TSQF, card->membase + STAT);
1233 PRINTK("nicstar%d: TSQ full.\n", card->index);
1234 process_tsq(card);
1235 }
1236
1237 /* Timer overflow */
1238 if (stat_r & NS_STAT_TMROF)
1239 {
1240 writel(NS_STAT_TMROF, card->membase + STAT);
1241 PRINTK("nicstar%d: Timer overflow.\n", card->index);
1242 }
1243
1244 /* PHY device interrupt signal active */
1245 if (stat_r & NS_STAT_PHYI)
1246 {
1247 writel(NS_STAT_PHYI, card->membase + STAT);
1248 PRINTK("nicstar%d: PHY interrupt.\n", card->index);
1249 if (dev->phy && dev->phy->interrupt) {
1250 dev->phy->interrupt(dev);
1251 }
1252 }
1253
1254 /* Small Buffer Queue is full */
1255 if (stat_r & NS_STAT_SFBQF)
1256 {
1257 writel(NS_STAT_SFBQF, card->membase + STAT);
1258 printk("nicstar%d: Small free buffer queue is full.\n", card->index);
1259 }
1260
1261 /* Large Buffer Queue is full */
1262 if (stat_r & NS_STAT_LFBQF)
1263 {
1264 writel(NS_STAT_LFBQF, card->membase + STAT);
1265 printk("nicstar%d: Large free buffer queue is full.\n", card->index);
1266 }
1267
1268 /* Receive Status Queue is full */
1269 if (stat_r & NS_STAT_RSQF)
1270 {
1271 writel(NS_STAT_RSQF, card->membase + STAT);
1272 printk("nicstar%d: RSQ full.\n", card->index);
1273 process_rsq(card);
1274 }
1275
1276 /* Complete CS-PDU received */
1277 if (stat_r & NS_STAT_EOPDU)
1278 {
1279 RXPRINTK("nicstar%d: End of CS-PDU received.\n", card->index);
1280 process_rsq(card);
1281 writel(NS_STAT_EOPDU, card->membase + STAT);
1282 }
1283
1284 /* Raw cell received */
1285 if (stat_r & NS_STAT_RAWCF)
1286 {
1287 writel(NS_STAT_RAWCF, card->membase + STAT);
1288 #ifndef RCQ_SUPPORT
1289 printk("nicstar%d: Raw cell received and no support yet...\n",
1290 card->index);
1291 #endif /* RCQ_SUPPORT */
1292 /* NOTE: the following procedure may keep a raw cell pending until the
1293 next interrupt. As this preliminary support is only meant to
1294 avoid buffer leakage, this is not an issue. */
1295 while (readl(card->membase + RAWCT) != card->rawch)
1296 {
1297 ns_rcqe *rawcell;
1298
1299 rawcell = (ns_rcqe *) bus_to_virt(card->rawch);
1300 if (ns_rcqe_islast(rawcell))
1301 {
1302 struct sk_buff *oldbuf;
1303
1304 oldbuf = card->rcbuf;
1305 card->rcbuf = (struct sk_buff *) ns_rcqe_nextbufhandle(rawcell);
1306 card->rawch = (u32) virt_to_bus(card->rcbuf->data);
1307 recycle_rx_buf(card, oldbuf);
1308 }
1309 else
1310 card->rawch += NS_RCQE_SIZE;
1311 }
1312 }
1313
1314 /* Small buffer queue is empty */
1315 if (stat_r & NS_STAT_SFBQE)
1316 {
1317 int i;
1318 struct sk_buff *sb;
1319
1320 writel(NS_STAT_SFBQE, card->membase + STAT);
1321 printk("nicstar%d: Small free buffer queue empty.\n",
1322 card->index);
1323 for (i = 0; i < card->sbnr.min; i++)
1324 {
1325 sb = dev_alloc_skb(NS_SMSKBSIZE);
1326 if (sb == NULL)
1327 {
1328 writel(readl(card->membase + CFG) & ~NS_CFG_EFBIE, card->membase + CFG);
1329 card->efbie = 0;
1330 break;
1331 }
1332 NS_SKB_CB(sb)->buf_type = BUF_SM;
1333 skb_queue_tail(&card->sbpool.queue, sb);
1334 skb_reserve(sb, NS_AAL0_HEADER);
1335 push_rxbufs(card, sb);
1336 }
1337 card->sbfqc = i;
1338 process_rsq(card);
1339 }
1340
1341 /* Large buffer queue empty */
1342 if (stat_r & NS_STAT_LFBQE)
1343 {
1344 int i;
1345 struct sk_buff *lb;
1346
1347 writel(NS_STAT_LFBQE, card->membase + STAT);
1348 printk("nicstar%d: Large free buffer queue empty.\n",
1349 card->index);
1350 for (i = 0; i < card->lbnr.min; i++)
1351 {
1352 lb = dev_alloc_skb(NS_LGSKBSIZE);
1353 if (lb == NULL)
1354 {
1355 writel(readl(card->membase + CFG) & ~NS_CFG_EFBIE, card->membase + CFG);
1356 card->efbie = 0;
1357 break;
1358 }
1359 NS_SKB_CB(lb)->buf_type = BUF_LG;
1360 skb_queue_tail(&card->lbpool.queue, lb);
1361 skb_reserve(lb, NS_SMBUFSIZE);
1362 push_rxbufs(card, lb);
1363 }
1364 card->lbfqc = i;
1365 process_rsq(card);
1366 }
1367
1368 /* Receive Status Queue is 7/8 full */
1369 if (stat_r & NS_STAT_RSQAF)
1370 {
1371 writel(NS_STAT_RSQAF, card->membase + STAT);
1372 RXPRINTK("nicstar%d: RSQ almost full.\n", card->index);
1373 process_rsq(card);
1374 }
1375
1376 spin_unlock_irqrestore(&card->int_lock, flags);
1377 PRINTK("nicstar%d: end of interrupt service\n", card->index);
1378 return IRQ_HANDLED;
1379 }
1380
1381
1382
1383 static int ns_open(struct atm_vcc *vcc)
1384 {
1385 ns_dev *card;
1386 vc_map *vc;
1387 unsigned long tmpl, modl;
1388 int tcr, tcra; /* target cell rate, and absolute value */
1389 int n = 0; /* Number of entries in the TST. Initialized to remove
1390 the compiler warning. */
1391 u32 u32d[4];
1392 int frscdi = 0; /* Index of the SCD. Initialized to remove the compiler
1393 warning. How I wish compilers were clever enough to
1394 tell which variables can truly be used
1395 uninitialized... */
1396 int inuse; /* tx or rx vc already in use by another vcc */
1397 short vpi = vcc->vpi;
1398 int vci = vcc->vci;
1399
1400 card = (ns_dev *) vcc->dev->dev_data;
1401 PRINTK("nicstar%d: opening vpi.vci %d.%d \n", card->index, (int) vpi, vci);
1402 if (vcc->qos.aal != ATM_AAL5 && vcc->qos.aal != ATM_AAL0)
1403 {
1404 PRINTK("nicstar%d: unsupported AAL.\n", card->index);
1405 return -EINVAL;
1406 }
1407
1408 vc = &(card->vcmap[vpi << card->vcibits | vci]);
1409 vcc->dev_data = vc;
1410
1411 inuse = 0;
1412 if (vcc->qos.txtp.traffic_class != ATM_NONE && vc->tx)
1413 inuse = 1;
1414 if (vcc->qos.rxtp.traffic_class != ATM_NONE && vc->rx)
1415 inuse += 2;
1416 if (inuse)
1417 {
1418 printk("nicstar%d: %s vci already in use.\n", card->index,
1419 inuse == 1 ? "tx" : inuse == 2 ? "rx" : "tx and rx");
1420 return -EINVAL;
1421 }
1422
1423 set_bit(ATM_VF_ADDR,&vcc->flags);
1424
1425 /* NOTE: You are not allowed to modify an open connection's QOS. To change
1426 that, remove the ATM_VF_PARTIAL flag checking. There may be other changes
1427 needed to do that. */
1428 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
1429 {
1430 scq_info *scq;
1431
1432 set_bit(ATM_VF_PARTIAL,&vcc->flags);
1433 if (vcc->qos.txtp.traffic_class == ATM_CBR)
1434 {
1435 /* Check requested cell rate and availability of SCD */
1436 if (vcc->qos.txtp.max_pcr == 0 && vcc->qos.txtp.pcr == 0 &&
1437 vcc->qos.txtp.min_pcr == 0)
1438 {
1439 PRINTK("nicstar%d: trying to open a CBR vc with cell rate = 0 \n",
1440 card->index);
1441 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1442 clear_bit(ATM_VF_ADDR,&vcc->flags);
1443 return -EINVAL;
1444 }
1445
1446 tcr = atm_pcr_goal(&(vcc->qos.txtp));
1447 tcra = tcr >= 0 ? tcr : -tcr;
1448
1449 PRINTK("nicstar%d: target cell rate = %d.\n", card->index,
1450 vcc->qos.txtp.max_pcr);
1451
1452 tmpl = (unsigned long)tcra * (unsigned long)NS_TST_NUM_ENTRIES;
1453 modl = tmpl % card->max_pcr;
1454
1455 n = (int)(tmpl / card->max_pcr);
1456 if (tcr > 0)
1457 {
1458 if (modl > 0) n++;
1459 }
1460 else if (tcr == 0)
1461 {
1462 if ((n = (card->tst_free_entries - NS_TST_RESERVED)) <= 0)
1463 {
1464 PRINTK("nicstar%d: no CBR bandwidth free.\n", card->index);
1465 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1466 clear_bit(ATM_VF_ADDR,&vcc->flags);
1467 return -EINVAL;
1468 }
1469 }
1470
1471 if (n == 0)
1472 {
1473 printk("nicstar%d: selected bandwidth < granularity.\n", card->index);
1474 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1475 clear_bit(ATM_VF_ADDR,&vcc->flags);
1476 return -EINVAL;
1477 }
1478
1479 if (n > (card->tst_free_entries - NS_TST_RESERVED))
1480 {
1481 PRINTK("nicstar%d: not enough free CBR bandwidth.\n", card->index);
1482 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1483 clear_bit(ATM_VF_ADDR,&vcc->flags);
1484 return -EINVAL;
1485 }
1486 else
1487 card->tst_free_entries -= n;
1488
1489 XPRINTK("nicstar%d: writing %d tst entries.\n", card->index, n);
1490 for (frscdi = 0; frscdi < NS_FRSCD_NUM; frscdi++)
1491 {
1492 if (card->scd2vc[frscdi] == NULL)
1493 {
1494 card->scd2vc[frscdi] = vc;
1495 break;
1496 }
1497 }
1498 if (frscdi == NS_FRSCD_NUM)
1499 {
1500 PRINTK("nicstar%d: no SCD available for CBR channel.\n", card->index);
1501 card->tst_free_entries += n;
1502 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1503 clear_bit(ATM_VF_ADDR,&vcc->flags);
1504 return -EBUSY;
1505 }
1506
1507 vc->cbr_scd = NS_FRSCD + frscdi * NS_FRSCD_SIZE;
1508
1509 scq = get_scq(CBR_SCQSIZE, vc->cbr_scd);
1510 if (scq == NULL)
1511 {
1512 PRINTK("nicstar%d: can't get fixed rate SCQ.\n", card->index);
1513 card->scd2vc[frscdi] = NULL;
1514 card->tst_free_entries += n;
1515 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1516 clear_bit(ATM_VF_ADDR,&vcc->flags);
1517 return -ENOMEM;
1518 }
1519 vc->scq = scq;
1520 u32d[0] = (u32) virt_to_bus(scq->base);
1521 u32d[1] = (u32) 0x00000000;
1522 u32d[2] = (u32) 0xffffffff;
1523 u32d[3] = (u32) 0x00000000;
1524 ns_write_sram(card, vc->cbr_scd, u32d, 4);
1525
1526 fill_tst(card, n, vc);
1527 }
1528 else if (vcc->qos.txtp.traffic_class == ATM_UBR)
1529 {
1530 vc->cbr_scd = 0x00000000;
1531 vc->scq = card->scq0;
1532 }
1533
1534 if (vcc->qos.txtp.traffic_class != ATM_NONE)
1535 {
1536 vc->tx = 1;
1537 vc->tx_vcc = vcc;
1538 vc->tbd_count = 0;
1539 }
1540 if (vcc->qos.rxtp.traffic_class != ATM_NONE)
1541 {
1542 u32 status;
1543
1544 vc->rx = 1;
1545 vc->rx_vcc = vcc;
1546 vc->rx_iov = NULL;
1547
1548 /* Open the connection in hardware */
1549 if (vcc->qos.aal == ATM_AAL5)
1550 status = NS_RCTE_AAL5 | NS_RCTE_CONNECTOPEN;
1551 else /* vcc->qos.aal == ATM_AAL0 */
1552 status = NS_RCTE_AAL0 | NS_RCTE_CONNECTOPEN;
1553 #ifdef RCQ_SUPPORT
1554 status |= NS_RCTE_RAWCELLINTEN;
1555 #endif /* RCQ_SUPPORT */
1556 ns_write_sram(card, NS_RCT + (vpi << card->vcibits | vci) *
1557 NS_RCT_ENTRY_SIZE, &status, 1);
1558 }
1559
1560 }
1561
1562 set_bit(ATM_VF_READY,&vcc->flags);
1563 return 0;
1564 }
1565
1566
1567
1568 static void ns_close(struct atm_vcc *vcc)
1569 {
1570 vc_map *vc;
1571 ns_dev *card;
1572 u32 data;
1573 int i;
1574
1575 vc = vcc->dev_data;
1576 card = vcc->dev->dev_data;
1577 PRINTK("nicstar%d: closing vpi.vci %d.%d \n", card->index,
1578 (int) vcc->vpi, vcc->vci);
1579
1580 clear_bit(ATM_VF_READY,&vcc->flags);
1581
1582 if (vcc->qos.rxtp.traffic_class != ATM_NONE)
1583 {
1584 u32 addr;
1585 unsigned long flags;
1586
1587 addr = NS_RCT + (vcc->vpi << card->vcibits | vcc->vci) * NS_RCT_ENTRY_SIZE;
1588 ns_grab_res_lock(card, flags);
1589 while(CMD_BUSY(card));
1590 writel(NS_CMD_CLOSE_CONNECTION | addr << 2, card->membase + CMD);
1591 spin_unlock_irqrestore(&card->res_lock, flags);
1592
1593 vc->rx = 0;
1594 if (vc->rx_iov != NULL)
1595 {
1596 struct sk_buff *iovb;
1597 u32 stat;
1598
1599 stat = readl(card->membase + STAT);
1600 card->sbfqc = ns_stat_sfbqc_get(stat);
1601 card->lbfqc = ns_stat_lfbqc_get(stat);
1602
1603 PRINTK("nicstar%d: closing a VC with pending rx buffers.\n",
1604 card->index);
1605 iovb = vc->rx_iov;
1606 recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data,
1607 NS_SKB(iovb)->iovcnt);
1608 NS_SKB(iovb)->iovcnt = 0;
1609 NS_SKB(iovb)->vcc = NULL;
1610 ns_grab_int_lock(card, flags);
1611 recycle_iov_buf(card, iovb);
1612 spin_unlock_irqrestore(&card->int_lock, flags);
1613 vc->rx_iov = NULL;
1614 }
1615 }
1616
1617 if (vcc->qos.txtp.traffic_class != ATM_NONE)
1618 {
1619 vc->tx = 0;
1620 }
1621
1622 if (vcc->qos.txtp.traffic_class == ATM_CBR)
1623 {
1624 unsigned long flags;
1625 ns_scqe *scqep;
1626 scq_info *scq;
1627
1628 scq = vc->scq;
1629
1630 for (;;)
1631 {
1632 ns_grab_scq_lock(card, scq, flags);
1633 scqep = scq->next;
1634 if (scqep == scq->base)
1635 scqep = scq->last;
1636 else
1637 scqep--;
1638 if (scqep == scq->tail)
1639 {
1640 spin_unlock_irqrestore(&scq->lock, flags);
1641 break;
1642 }
1643 /* If the last entry is not a TSR, place one in the SCQ in order to
1644 be able to completely drain it and then close. */
1645 if (!ns_scqe_is_tsr(scqep) && scq->tail != scq->next)
1646 {
1647 ns_scqe tsr;
1648 u32 scdi, scqi;
1649 u32 data;
1650 int index;
1651
1652 tsr.word_1 = ns_tsr_mkword_1(NS_TSR_INTENABLE);
1653 scdi = (vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE;
1654 scqi = scq->next - scq->base;
1655 tsr.word_2 = ns_tsr_mkword_2(scdi, scqi);
1656 tsr.word_3 = 0x00000000;
1657 tsr.word_4 = 0x00000000;
1658 *scq->next = tsr;
1659 index = (int) scqi;
1660 scq->skb[index] = NULL;
1661 if (scq->next == scq->last)
1662 scq->next = scq->base;
1663 else
1664 scq->next++;
1665 data = (u32) virt_to_bus(scq->next);
1666 ns_write_sram(card, scq->scd, &data, 1);
1667 }
1668 spin_unlock_irqrestore(&scq->lock, flags);
1669 schedule();
1670 }
1671
1672 /* Free all TST entries */
1673 data = NS_TST_OPCODE_VARIABLE;
1674 for (i = 0; i < NS_TST_NUM_ENTRIES; i++)
1675 {
1676 if (card->tste2vc[i] == vc)
1677 {
1678 ns_write_sram(card, card->tst_addr + i, &data, 1);
1679 card->tste2vc[i] = NULL;
1680 card->tst_free_entries++;
1681 }
1682 }
1683
1684 card->scd2vc[(vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE] = NULL;
1685 free_scq(vc->scq, vcc);
1686 }
1687
1688 /* remove all references to vcc before deleting it */
1689 if (vcc->qos.txtp.traffic_class != ATM_NONE)
1690 {
1691 unsigned long flags;
1692 scq_info *scq = card->scq0;
1693
1694 ns_grab_scq_lock(card, scq, flags);
1695
1696 for(i = 0; i < scq->num_entries; i++) {
1697 if(scq->skb[i] && ATM_SKB(scq->skb[i])->vcc == vcc) {
1698 ATM_SKB(scq->skb[i])->vcc = NULL;
1699 atm_return(vcc, scq->skb[i]->truesize);
1700 PRINTK("nicstar: deleted pending vcc mapping\n");
1701 }
1702 }
1703
1704 spin_unlock_irqrestore(&scq->lock, flags);
1705 }
1706
1707 vcc->dev_data = NULL;
1708 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1709 clear_bit(ATM_VF_ADDR,&vcc->flags);
1710
1711 #ifdef RX_DEBUG
1712 {
1713 u32 stat, cfg;
1714 stat = readl(card->membase + STAT);
1715 cfg = readl(card->membase + CFG);
1716 printk("STAT = 0x%08X CFG = 0x%08X \n", stat, cfg);
1717 printk("TSQ: base = 0x%08X next = 0x%08X last = 0x%08X TSQT = 0x%08X \n",
1718 (u32) card->tsq.base, (u32) card->tsq.next,(u32) card->tsq.last,
1719 readl(card->membase + TSQT));
1720 printk("RSQ: base = 0x%08X next = 0x%08X last = 0x%08X RSQT = 0x%08X \n",
1721 (u32) card->rsq.base, (u32) card->rsq.next,(u32) card->rsq.last,
1722 readl(card->membase + RSQT));
1723 printk("Empty free buffer queue interrupt %s \n",
1724 card->efbie ? "enabled" : "disabled");
1725 printk("SBCNT = %d count = %d LBCNT = %d count = %d \n",
1726 ns_stat_sfbqc_get(stat), card->sbpool.count,
1727 ns_stat_lfbqc_get(stat), card->lbpool.count);
1728 printk("hbpool.count = %d iovpool.count = %d \n",
1729 card->hbpool.count, card->iovpool.count);
1730 }
1731 #endif /* RX_DEBUG */
1732 }
1733
1734
1735
1736 static void fill_tst(ns_dev *card, int n, vc_map *vc)
1737 {
1738 u32 new_tst;
1739 unsigned long cl;
1740 int e, r;
1741 u32 data;
1742
1743 /* It would be very complicated to keep the two TSTs synchronized while
1744 assuring that writes are only made to the inactive TST. So, for now I
1745 will use only one TST. If problems occur, I will change this again */
1746
1747 new_tst = card->tst_addr;
1748
1749 /* Fill procedure */
1750
1751 for (e = 0; e < NS_TST_NUM_ENTRIES; e++)
1752 {
1753 if (card->tste2vc[e] == NULL)
1754 break;
1755 }
1756 if (e == NS_TST_NUM_ENTRIES) {
1757 printk("nicstar%d: No free TST entries found. \n", card->index);
1758 return;
1759 }
1760
1761 r = n;
1762 cl = NS_TST_NUM_ENTRIES;
1763 data = ns_tste_make(NS_TST_OPCODE_FIXED, vc->cbr_scd);
1764
1765 while (r > 0)
1766 {
1767 if (cl >= NS_TST_NUM_ENTRIES && card->tste2vc[e] == NULL)
1768 {
1769 card->tste2vc[e] = vc;
1770 ns_write_sram(card, new_tst + e, &data, 1);
1771 cl -= NS_TST_NUM_ENTRIES;
1772 r--;
1773 }
1774
1775 if (++e == NS_TST_NUM_ENTRIES) {
1776 e = 0;
1777 }
1778 cl += n;
1779 }
1780
1781 /* End of fill procedure */
1782
1783 data = ns_tste_make(NS_TST_OPCODE_END, new_tst);
1784 ns_write_sram(card, new_tst + NS_TST_NUM_ENTRIES, &data, 1);
1785 ns_write_sram(card, card->tst_addr + NS_TST_NUM_ENTRIES, &data, 1);
1786 card->tst_addr = new_tst;
1787 }
1788
1789
1790
1791 static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb)
1792 {
1793 ns_dev *card;
1794 vc_map *vc;
1795 scq_info *scq;
1796 unsigned long buflen;
1797 ns_scqe scqe;
1798 u32 flags; /* TBD flags, not CPU flags */
1799
1800 card = vcc->dev->dev_data;
1801 TXPRINTK("nicstar%d: ns_send() called.\n", card->index);
1802 if ((vc = (vc_map *) vcc->dev_data) == NULL)
1803 {
1804 printk("nicstar%d: vcc->dev_data == NULL on ns_send().\n", card->index);
1805 atomic_inc(&vcc->stats->tx_err);
1806 dev_kfree_skb_any(skb);
1807 return -EINVAL;
1808 }
1809
1810 if (!vc->tx)
1811 {
1812 printk("nicstar%d: Trying to transmit on a non-tx VC.\n", card->index);
1813 atomic_inc(&vcc->stats->tx_err);
1814 dev_kfree_skb_any(skb);
1815 return -EINVAL;
1816 }
1817
1818 if (vcc->qos.aal != ATM_AAL5 && vcc->qos.aal != ATM_AAL0)
1819 {
1820 printk("nicstar%d: Only AAL0 and AAL5 are supported.\n", card->index);
1821 atomic_inc(&vcc->stats->tx_err);
1822 dev_kfree_skb_any(skb);
1823 return -EINVAL;
1824 }
1825
1826 if (skb_shinfo(skb)->nr_frags != 0)
1827 {
1828 printk("nicstar%d: No scatter-gather yet.\n", card->index);
1829 atomic_inc(&vcc->stats->tx_err);
1830 dev_kfree_skb_any(skb);
1831 return -EINVAL;
1832 }
1833
1834 ATM_SKB(skb)->vcc = vcc;
1835
1836 if (vcc->qos.aal == ATM_AAL5)
1837 {
1838 buflen = (skb->len + 47 + 8) / 48 * 48; /* Multiple of 48 */
1839 flags = NS_TBD_AAL5;
1840 scqe.word_2 = cpu_to_le32((u32) virt_to_bus(skb->data));
1841 scqe.word_3 = cpu_to_le32((u32) skb->len);
1842 scqe.word_4 = ns_tbd_mkword_4(0, (u32) vcc->vpi, (u32) vcc->vci, 0,
1843 ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? 1 : 0);
1844 flags |= NS_TBD_EOPDU;
1845 }
1846 else /* (vcc->qos.aal == ATM_AAL0) */
1847 {
1848 buflen = ATM_CELL_PAYLOAD; /* i.e., 48 bytes */
1849 flags = NS_TBD_AAL0;
1850 scqe.word_2 = cpu_to_le32((u32) virt_to_bus(skb->data) + NS_AAL0_HEADER);
1851 scqe.word_3 = cpu_to_le32(0x00000000);
1852 if (*skb->data & 0x02) /* Payload type 1 - end of pdu */
1853 flags |= NS_TBD_EOPDU;
1854 scqe.word_4 = cpu_to_le32(*((u32 *) skb->data) & ~NS_TBD_VC_MASK);
1855 /* Force the VPI/VCI to be the same as in VCC struct */
1856 scqe.word_4 |= cpu_to_le32((((u32) vcc->vpi) << NS_TBD_VPI_SHIFT |
1857 ((u32) vcc->vci) << NS_TBD_VCI_SHIFT) &
1858 NS_TBD_VC_MASK);
1859 }
1860
1861 if (vcc->qos.txtp.traffic_class == ATM_CBR)
1862 {
1863 scqe.word_1 = ns_tbd_mkword_1_novbr(flags, (u32) buflen);
1864 scq = ((vc_map *) vcc->dev_data)->scq;
1865 }
1866 else
1867 {
1868 scqe.word_1 = ns_tbd_mkword_1(flags, (u32) 1, (u32) 1, (u32) buflen);
1869 scq = card->scq0;
1870 }
1871
1872 if (push_scqe(card, vc, scq, &scqe, skb) != 0)
1873 {
1874 atomic_inc(&vcc->stats->tx_err);
1875 dev_kfree_skb_any(skb);
1876 return -EIO;
1877 }
1878 atomic_inc(&vcc->stats->tx);
1879
1880 return 0;
1881 }
1882
1883
1884
1885 static int push_scqe(ns_dev *card, vc_map *vc, scq_info *scq, ns_scqe *tbd,
1886 struct sk_buff *skb)
1887 {
1888 unsigned long flags;
1889 ns_scqe tsr;
1890 u32 scdi, scqi;
1891 int scq_is_vbr;
1892 u32 data;
1893 int index;
1894
1895 ns_grab_scq_lock(card, scq, flags);
1896 while (scq->tail == scq->next)
1897 {
1898 if (in_interrupt()) {
1899 spin_unlock_irqrestore(&scq->lock, flags);
1900 printk("nicstar%d: Error pushing TBD.\n", card->index);
1901 return 1;
1902 }
1903
1904 scq->full = 1;
1905 spin_unlock_irqrestore(&scq->lock, flags);
1906 interruptible_sleep_on_timeout(&scq->scqfull_waitq, SCQFULL_TIMEOUT);
1907 ns_grab_scq_lock(card, scq, flags);
1908
1909 if (scq->full) {
1910 spin_unlock_irqrestore(&scq->lock, flags);
1911 printk("nicstar%d: Timeout pushing TBD.\n", card->index);
1912 return 1;
1913 }
1914 }
1915 *scq->next = *tbd;
1916 index = (int) (scq->next - scq->base);
1917 scq->skb[index] = skb;
1918 XPRINTK("nicstar%d: sending skb at 0x%x (pos %d).\n",
1919 card->index, (u32) skb, index);
1920 XPRINTK("nicstar%d: TBD written:\n0x%x\n0x%x\n0x%x\n0x%x\n at 0x%x.\n",
1921 card->index, le32_to_cpu(tbd->word_1), le32_to_cpu(tbd->word_2),
1922 le32_to_cpu(tbd->word_3), le32_to_cpu(tbd->word_4),
1923 (u32) scq->next);
1924 if (scq->next == scq->last)
1925 scq->next = scq->base;
1926 else
1927 scq->next++;
1928
1929 vc->tbd_count++;
1930 if (scq->num_entries == VBR_SCQ_NUM_ENTRIES)
1931 {
1932 scq->tbd_count++;
1933 scq_is_vbr = 1;
1934 }
1935 else
1936 scq_is_vbr = 0;
1937
1938 if (vc->tbd_count >= MAX_TBD_PER_VC || scq->tbd_count >= MAX_TBD_PER_SCQ)
1939 {
1940 int has_run = 0;
1941
1942 while (scq->tail == scq->next)
1943 {
1944 if (in_interrupt()) {
1945 data = (u32) virt_to_bus(scq->next);
1946 ns_write_sram(card, scq->scd, &data, 1);
1947 spin_unlock_irqrestore(&scq->lock, flags);
1948 printk("nicstar%d: Error pushing TSR.\n", card->index);
1949 return 0;
1950 }
1951
1952 scq->full = 1;
1953 if (has_run++) break;
1954 spin_unlock_irqrestore(&scq->lock, flags);
1955 interruptible_sleep_on_timeout(&scq->scqfull_waitq, SCQFULL_TIMEOUT);
1956 ns_grab_scq_lock(card, scq, flags);
1957 }
1958
1959 if (!scq->full)
1960 {
1961 tsr.word_1 = ns_tsr_mkword_1(NS_TSR_INTENABLE);
1962 if (scq_is_vbr)
1963 scdi = NS_TSR_SCDISVBR;
1964 else
1965 scdi = (vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE;
1966 scqi = scq->next - scq->base;
1967 tsr.word_2 = ns_tsr_mkword_2(scdi, scqi);
1968 tsr.word_3 = 0x00000000;
1969 tsr.word_4 = 0x00000000;
1970
1971 *scq->next = tsr;
1972 index = (int) scqi;
1973 scq->skb[index] = NULL;
1974 XPRINTK("nicstar%d: TSR written:\n0x%x\n0x%x\n0x%x\n0x%x\n at 0x%x.\n",
1975 card->index, le32_to_cpu(tsr.word_1), le32_to_cpu(tsr.word_2),
1976 le32_to_cpu(tsr.word_3), le32_to_cpu(tsr.word_4),
1977 (u32) scq->next);
1978 if (scq->next == scq->last)
1979 scq->next = scq->base;
1980 else
1981 scq->next++;
1982 vc->tbd_count = 0;
1983 scq->tbd_count = 0;
1984 }
1985 else
1986 PRINTK("nicstar%d: Timeout pushing TSR.\n", card->index);
1987 }
1988 data = (u32) virt_to_bus(scq->next);
1989 ns_write_sram(card, scq->scd, &data, 1);
1990
1991 spin_unlock_irqrestore(&scq->lock, flags);
1992
1993 return 0;
1994 }
1995
1996
1997
1998 static void process_tsq(ns_dev *card)
1999 {
2000 u32 scdi;
2001 scq_info *scq;
2002 ns_tsi *previous = NULL, *one_ahead, *two_ahead;
2003 int serviced_entries; /* flag indicating at least on entry was serviced */
2004
2005 serviced_entries = 0;
2006
2007 if (card->tsq.next == card->tsq.last)
2008 one_ahead = card->tsq.base;
2009 else
2010 one_ahead = card->tsq.next + 1;
2011
2012 if (one_ahead == card->tsq.last)
2013 two_ahead = card->tsq.base;
2014 else
2015 two_ahead = one_ahead + 1;
2016
2017 while (!ns_tsi_isempty(card->tsq.next) || !ns_tsi_isempty(one_ahead) ||
2018 !ns_tsi_isempty(two_ahead))
2019 /* At most two empty, as stated in the 77201 errata */
2020 {
2021 serviced_entries = 1;
2022
2023 /* Skip the one or two possible empty entries */
2024 while (ns_tsi_isempty(card->tsq.next)) {
2025 if (card->tsq.next == card->tsq.last)
2026 card->tsq.next = card->tsq.base;
2027 else
2028 card->tsq.next++;
2029 }
2030
2031 if (!ns_tsi_tmrof(card->tsq.next))
2032 {
2033 scdi = ns_tsi_getscdindex(card->tsq.next);
2034 if (scdi == NS_TSI_SCDISVBR)
2035 scq = card->scq0;
2036 else
2037 {
2038 if (card->scd2vc[scdi] == NULL)
2039 {
2040 printk("nicstar%d: could not find VC from SCD index.\n",
2041 card->index);
2042 ns_tsi_init(card->tsq.next);
2043 return;
2044 }
2045 scq = card->scd2vc[scdi]->scq;
2046 }
2047 drain_scq(card, scq, ns_tsi_getscqpos(card->tsq.next));
2048 scq->full = 0;
2049 wake_up_interruptible(&(scq->scqfull_waitq));
2050 }
2051
2052 ns_tsi_init(card->tsq.next);
2053 previous = card->tsq.next;
2054 if (card->tsq.next == card->tsq.last)
2055 card->tsq.next = card->tsq.base;
2056 else
2057 card->tsq.next++;
2058
2059 if (card->tsq.next == card->tsq.last)
2060 one_ahead = card->tsq.base;
2061 else
2062 one_ahead = card->tsq.next + 1;
2063
2064 if (one_ahead == card->tsq.last)
2065 two_ahead = card->tsq.base;
2066 else
2067 two_ahead = one_ahead + 1;
2068 }
2069
2070 if (serviced_entries) {
2071 writel((((u32) previous) - ((u32) card->tsq.base)),
2072 card->membase + TSQH);
2073 }
2074 }
2075
2076
2077
2078 static void drain_scq(ns_dev *card, scq_info *scq, int pos)
2079 {
2080 struct atm_vcc *vcc;
2081 struct sk_buff *skb;
2082 int i;
2083 unsigned long flags;
2084
2085 XPRINTK("nicstar%d: drain_scq() called, scq at 0x%x, pos %d.\n",
2086 card->index, (u32) scq, pos);
2087 if (pos >= scq->num_entries)
2088 {
2089 printk("nicstar%d: Bad index on drain_scq().\n", card->index);
2090 return;
2091 }
2092
2093 ns_grab_scq_lock(card, scq, flags);
2094 i = (int) (scq->tail - scq->base);
2095 if (++i == scq->num_entries)
2096 i = 0;
2097 while (i != pos)
2098 {
2099 skb = scq->skb[i];
2100 XPRINTK("nicstar%d: freeing skb at 0x%x (index %d).\n",
2101 card->index, (u32) skb, i);
2102 if (skb != NULL)
2103 {
2104 vcc = ATM_SKB(skb)->vcc;
2105 if (vcc && vcc->pop != NULL) {
2106 vcc->pop(vcc, skb);
2107 } else {
2108 dev_kfree_skb_irq(skb);
2109 }
2110 scq->skb[i] = NULL;
2111 }
2112 if (++i == scq->num_entries)
2113 i = 0;
2114 }
2115 scq->tail = scq->base + pos;
2116 spin_unlock_irqrestore(&scq->lock, flags);
2117 }
2118
2119
2120
2121 static void process_rsq(ns_dev *card)
2122 {
2123 ns_rsqe *previous;
2124
2125 if (!ns_rsqe_valid(card->rsq.next))
2126 return;
2127 do {
2128 dequeue_rx(card, card->rsq.next);
2129 ns_rsqe_init(card->rsq.next);
2130 previous = card->rsq.next;
2131 if (card->rsq.next == card->rsq.last)
2132 card->rsq.next = card->rsq.base;
2133 else
2134 card->rsq.next++;
2135 } while (ns_rsqe_valid(card->rsq.next));
2136 writel((((u32) previous) - ((u32) card->rsq.base)),
2137 card->membase + RSQH);
2138 }
2139
2140
2141
2142 static void dequeue_rx(ns_dev *card, ns_rsqe *rsqe)
2143 {
2144 u32 vpi, vci;
2145 vc_map *vc;
2146 struct sk_buff *iovb;
2147 struct iovec *iov;
2148 struct atm_vcc *vcc;
2149 struct sk_buff *skb;
2150 unsigned short aal5_len;
2151 int len;
2152 u32 stat;
2153
2154 stat = readl(card->membase + STAT);
2155 card->sbfqc = ns_stat_sfbqc_get(stat);
2156 card->lbfqc = ns_stat_lfbqc_get(stat);
2157
2158 skb = (struct sk_buff *) le32_to_cpu(rsqe->buffer_handle);
2159 vpi = ns_rsqe_vpi(rsqe);
2160 vci = ns_rsqe_vci(rsqe);
2161 if (vpi >= 1UL << card->vpibits || vci >= 1UL << card->vcibits)
2162 {
2163 printk("nicstar%d: SDU received for out-of-range vc %d.%d.\n",
2164 card->index, vpi, vci);
2165 recycle_rx_buf(card, skb);
2166 return;
2167 }
2168
2169 vc = &(card->vcmap[vpi << card->vcibits | vci]);
2170 if (!vc->rx)
2171 {
2172 RXPRINTK("nicstar%d: SDU received on non-rx vc %d.%d.\n",
2173 card->index, vpi, vci);
2174 recycle_rx_buf(card, skb);
2175 return;
2176 }
2177
2178 vcc = vc->rx_vcc;
2179
2180 if (vcc->qos.aal == ATM_AAL0)
2181 {
2182 struct sk_buff *sb;
2183 unsigned char *cell;
2184 int i;
2185
2186 cell = skb->data;
2187 for (i = ns_rsqe_cellcount(rsqe); i; i--)
2188 {
2189 if ((sb = dev_alloc_skb(NS_SMSKBSIZE)) == NULL)
2190 {
2191 printk("nicstar%d: Can't allocate buffers for aal0.\n",
2192 card->index);
2193 atomic_add(i,&vcc->stats->rx_drop);
2194 break;
2195 }
2196 if (!atm_charge(vcc, sb->truesize))
2197 {
2198 RXPRINTK("nicstar%d: atm_charge() dropped aal0 packets.\n",
2199 card->index);
2200 atomic_add(i-1,&vcc->stats->rx_drop); /* already increased by 1 */
2201 dev_kfree_skb_any(sb);
2202 break;
2203 }
2204 /* Rebuild the header */
2205 *((u32 *) sb->data) = le32_to_cpu(rsqe->word_1) << 4 |
2206 (ns_rsqe_clp(rsqe) ? 0x00000001 : 0x00000000);
2207 if (i == 1 && ns_rsqe_eopdu(rsqe))
2208 *((u32 *) sb->data) |= 0x00000002;
2209 skb_put(sb, NS_AAL0_HEADER);
2210 memcpy(skb_tail_pointer(sb), cell, ATM_CELL_PAYLOAD);
2211 skb_put(sb, ATM_CELL_PAYLOAD);
2212 ATM_SKB(sb)->vcc = vcc;
2213 __net_timestamp(sb);
2214 vcc->push(vcc, sb);
2215 atomic_inc(&vcc->stats->rx);
2216 cell += ATM_CELL_PAYLOAD;
2217 }
2218
2219 recycle_rx_buf(card, skb);
2220 return;
2221 }
2222
2223 /* To reach this point, the AAL layer can only be AAL5 */
2224
2225 if ((iovb = vc->rx_iov) == NULL)
2226 {
2227 iovb = skb_dequeue(&(card->iovpool.queue));
2228 if (iovb == NULL) /* No buffers in the queue */
2229 {
2230 iovb = alloc_skb(NS_IOVBUFSIZE, GFP_ATOMIC);
2231 if (iovb == NULL)
2232 {
2233 printk("nicstar%d: Out of iovec buffers.\n", card->index);
2234 atomic_inc(&vcc->stats->rx_drop);
2235 recycle_rx_buf(card, skb);
2236 return;
2237 }
2238 NS_SKB_CB(iovb)->buf_type = BUF_NONE;
2239 }
2240 else
2241 if (--card->iovpool.count < card->iovnr.min)
2242 {
2243 struct sk_buff *new_iovb;
2244 if ((new_iovb = alloc_skb(NS_IOVBUFSIZE, GFP_ATOMIC)) != NULL)
2245 {
2246 NS_SKB_CB(iovb)->buf_type = BUF_NONE;
2247 skb_queue_tail(&card->iovpool.queue, new_iovb);
2248 card->iovpool.count++;
2249 }
2250 }
2251 vc->rx_iov = iovb;
2252 NS_SKB(iovb)->iovcnt = 0;
2253 iovb->len = 0;
2254 iovb->data = iovb->head;
2255 skb_reset_tail_pointer(iovb);
2256 NS_SKB(iovb)->vcc = vcc;
2257 /* IMPORTANT: a pointer to the sk_buff containing the small or large
2258 buffer is stored as iovec base, NOT a pointer to the
2259 small or large buffer itself. */
2260 }
2261 else if (NS_SKB(iovb)->iovcnt >= NS_MAX_IOVECS)
2262 {
2263 printk("nicstar%d: received too big AAL5 SDU.\n", card->index);
2264 atomic_inc(&vcc->stats->rx_err);
2265 recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data, NS_MAX_IOVECS);
2266 NS_SKB(iovb)->iovcnt = 0;
2267 iovb->len = 0;
2268 iovb->data = iovb->head;
2269 skb_reset_tail_pointer(iovb);
2270 NS_SKB(iovb)->vcc = vcc;
2271 }
2272 iov = &((struct iovec *) iovb->data)[NS_SKB(iovb)->iovcnt++];
2273 iov->iov_base = (void *) skb;
2274 iov->iov_len = ns_rsqe_cellcount(rsqe) * 48;
2275 iovb->len += iov->iov_len;
2276
2277 if (NS_SKB(iovb)->iovcnt == 1)
2278 {
2279 if (NS_SKB_CB(skb)->buf_type != BUF_SM)
2280 {
2281 printk("nicstar%d: Expected a small buffer, and this is not one.\n",
2282 card->index);
2283 which_list(card, skb);
2284 atomic_inc(&vcc->stats->rx_err);
2285 recycle_rx_buf(card, skb);
2286 vc->rx_iov = NULL;
2287 recycle_iov_buf(card, iovb);
2288 return;
2289 }
2290 }
2291 else /* NS_SKB(iovb)->iovcnt >= 2 */
2292 {
2293 if (NS_SKB_CB(skb)->buf_type != BUF_LG)
2294 {
2295 printk("nicstar%d: Expected a large buffer, and this is not one.\n",
2296 card->index);
2297 which_list(card, skb);
2298 atomic_inc(&vcc->stats->rx_err);
2299 recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data,
2300 NS_SKB(iovb)->iovcnt);
2301 vc->rx_iov = NULL;
2302 recycle_iov_buf(card, iovb);
2303 return;
2304 }
2305 }
2306
2307 if (ns_rsqe_eopdu(rsqe))
2308 {
2309 /* This works correctly regardless of the endianness of the host */
2310 unsigned char *L1L2 = (unsigned char *)((u32)skb->data +
2311 iov->iov_len - 6);
2312 aal5_len = L1L2[0] << 8 | L1L2[1];
2313 len = (aal5_len == 0x0000) ? 0x10000 : aal5_len;
2314 if (ns_rsqe_crcerr(rsqe) ||
2315 len + 8 > iovb->len || len + (47 + 8) < iovb->len)
2316 {
2317 printk("nicstar%d: AAL5 CRC error", card->index);
2318 if (len + 8 > iovb->len || len + (47 + 8) < iovb->len)
2319 printk(" - PDU size mismatch.\n");
2320 else
2321 printk(".\n");
2322 atomic_inc(&vcc->stats->rx_err);
2323 recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data,
2324 NS_SKB(iovb)->iovcnt);
2325 vc->rx_iov = NULL;
2326 recycle_iov_buf(card, iovb);
2327 return;
2328 }
2329
2330 /* By this point we (hopefully) have a complete SDU without errors. */
2331
2332 if (NS_SKB(iovb)->iovcnt == 1) /* Just a small buffer */
2333 {
2334 /* skb points to a small buffer */
2335 if (!atm_charge(vcc, skb->truesize))
2336 {
2337 push_rxbufs(card, skb);
2338 atomic_inc(&vcc->stats->rx_drop);
2339 }
2340 else
2341 {
2342 skb_put(skb, len);
2343 dequeue_sm_buf(card, skb);
2344 #ifdef NS_USE_DESTRUCTORS
2345 skb->destructor = ns_sb_destructor;
2346 #endif /* NS_USE_DESTRUCTORS */
2347 ATM_SKB(skb)->vcc = vcc;
2348 __net_timestamp(skb);
2349 vcc->push(vcc, skb);
2350 atomic_inc(&vcc->stats->rx);
2351 }
2352 }
2353 else if (NS_SKB(iovb)->iovcnt == 2) /* One small plus one large buffer */
2354 {
2355 struct sk_buff *sb;
2356
2357 sb = (struct sk_buff *) (iov - 1)->iov_base;
2358 /* skb points to a large buffer */
2359
2360 if (len <= NS_SMBUFSIZE)
2361 {
2362 if (!atm_charge(vcc, sb->truesize))
2363 {
2364 push_rxbufs(card, sb);
2365 atomic_inc(&vcc->stats->rx_drop);
2366 }
2367 else
2368 {
2369 skb_put(sb, len);
2370 dequeue_sm_buf(card, sb);
2371 #ifdef NS_USE_DESTRUCTORS
2372 sb->destructor = ns_sb_destructor;
2373 #endif /* NS_USE_DESTRUCTORS */
2374 ATM_SKB(sb)->vcc = vcc;
2375 __net_timestamp(sb);
2376 vcc->push(vcc, sb);
2377 atomic_inc(&vcc->stats->rx);
2378 }
2379
2380 push_rxbufs(card, skb);
2381
2382 }
2383 else /* len > NS_SMBUFSIZE, the usual case */
2384 {
2385 if (!atm_charge(vcc, skb->truesize))
2386 {
2387 push_rxbufs(card, skb);
2388 atomic_inc(&vcc->stats->rx_drop);
2389 }
2390 else
2391 {
2392 dequeue_lg_buf(card, skb);
2393 #ifdef NS_USE_DESTRUCTORS
2394 skb->destructor = ns_lb_destructor;
2395 #endif /* NS_USE_DESTRUCTORS */
2396 skb_push(skb, NS_SMBUFSIZE);
2397 skb_copy_from_linear_data(sb, skb->data, NS_SMBUFSIZE);
2398 skb_put(skb, len - NS_SMBUFSIZE);
2399 ATM_SKB(skb)->vcc = vcc;
2400 __net_timestamp(skb);
2401 vcc->push(vcc, skb);
2402 atomic_inc(&vcc->stats->rx);
2403 }
2404
2405 push_rxbufs(card, sb);
2406
2407 }
2408
2409 }
2410 else /* Must push a huge buffer */
2411 {
2412 struct sk_buff *hb, *sb, *lb;
2413 int remaining, tocopy;
2414 int j;
2415
2416 hb = skb_dequeue(&(card->hbpool.queue));
2417 if (hb == NULL) /* No buffers in the queue */
2418 {
2419
2420 hb = dev_alloc_skb(NS_HBUFSIZE);
2421 if (hb == NULL)
2422 {
2423 printk("nicstar%d: Out of huge buffers.\n", card->index);
2424 atomic_inc(&vcc->stats->rx_drop);
2425 recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data,
2426 NS_SKB(iovb)->iovcnt);
2427 vc->rx_iov = NULL;
2428 recycle_iov_buf(card, iovb);
2429 return;
2430 }
2431 else if (card->hbpool.count < card->hbnr.min)
2432 {
2433 struct sk_buff *new_hb;
2434 if ((new_hb = dev_alloc_skb(NS_HBUFSIZE)) != NULL)
2435 {
2436 skb_queue_tail(&card->hbpool.queue, new_hb);
2437 card->hbpool.count++;
2438 }
2439 }
2440 NS_SKB_CB(hb)->buf_type = BUF_NONE;
2441 }
2442 else
2443 if (--card->hbpool.count < card->hbnr.min)
2444 {
2445 struct sk_buff *new_hb;
2446 if ((new_hb = dev_alloc_skb(NS_HBUFSIZE)) != NULL)
2447 {
2448 NS_SKB_CB(new_hb)->buf_type = BUF_NONE;
2449 skb_queue_tail(&card->hbpool.queue, new_hb);
2450 card->hbpool.count++;
2451 }
2452 if (card->hbpool.count < card->hbnr.min)
2453 {
2454 if ((new_hb = dev_alloc_skb(NS_HBUFSIZE)) != NULL)
2455 {
2456 NS_SKB_CB(new_hb)->buf_type = BUF_NONE;
2457 skb_queue_tail(&card->hbpool.queue, new_hb);
2458 card->hbpool.count++;
2459 }
2460 }
2461 }
2462
2463 iov = (struct iovec *) iovb->data;
2464
2465 if (!atm_charge(vcc, hb->truesize))
2466 {
2467 recycle_iovec_rx_bufs(card, iov, NS_SKB(iovb)->iovcnt);
2468 if (card->hbpool.count < card->hbnr.max)
2469 {
2470 skb_queue_tail(&card->hbpool.queue, hb);
2471 card->hbpool.count++;
2472 }
2473 else
2474 dev_kfree_skb_any(hb);
2475 atomic_inc(&vcc->stats->rx_drop);
2476 }
2477 else
2478 {
2479 /* Copy the small buffer to the huge buffer */
2480 sb = (struct sk_buff *) iov->iov_base;
2481 skb_copy_from_linear_data(sb, hb->data, iov->iov_len);
2482 skb_put(hb, iov->iov_len);
2483 remaining = len - iov->iov_len;
2484 iov++;
2485 /* Free the small buffer */
2486 push_rxbufs(card, sb);
2487
2488 /* Copy all large buffers to the huge buffer and free them */
2489 for (j = 1; j < NS_SKB(iovb)->iovcnt; j++)
2490 {
2491 lb = (struct sk_buff *) iov->iov_base;
2492 tocopy = min_t(int, remaining, iov->iov_len);
2493 skb_copy_from_linear_data(lb, skb_tail_pointer(hb), tocopy);
2494 skb_put(hb, tocopy);
2495 iov++;
2496 remaining -= tocopy;
2497 push_rxbufs(card, lb);
2498 }
2499 #ifdef EXTRA_DEBUG
2500 if (remaining != 0 || hb->len != len)
2501 printk("nicstar%d: Huge buffer len mismatch.\n", card->index);
2502 #endif /* EXTRA_DEBUG */
2503 ATM_SKB(hb)->vcc = vcc;
2504 #ifdef NS_USE_DESTRUCTORS
2505 hb->destructor = ns_hb_destructor;
2506 #endif /* NS_USE_DESTRUCTORS */
2507 __net_timestamp(hb);
2508 vcc->push(vcc, hb);
2509 atomic_inc(&vcc->stats->rx);
2510 }
2511 }
2512
2513 vc->rx_iov = NULL;
2514 recycle_iov_buf(card, iovb);
2515 }
2516
2517 }
2518
2519
2520
2521 #ifdef NS_USE_DESTRUCTORS
2522
2523 static void ns_sb_destructor(struct sk_buff *sb)
2524 {
2525 ns_dev *card;
2526 u32 stat;
2527
2528 card = (ns_dev *) ATM_SKB(sb)->vcc->dev->dev_data;
2529 stat = readl(card->membase + STAT);
2530 card->sbfqc = ns_stat_sfbqc_get(stat);
2531 card->lbfqc = ns_stat_lfbqc_get(stat);
2532
2533 do
2534 {
2535 sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
2536 if (sb == NULL)
2537 break;
2538 NS_SKB_CB(sb)->buf_type = BUF_SM;
2539 skb_queue_tail(&card->sbpool.queue, sb);
2540 skb_reserve(sb, NS_AAL0_HEADER);
2541 push_rxbufs(card, sb);
2542 } while (card->sbfqc < card->sbnr.min);
2543 }
2544
2545
2546
2547 static void ns_lb_destructor(struct sk_buff *lb)
2548 {
2549 ns_dev *card;
2550 u32 stat;
2551
2552 card = (ns_dev *) ATM_SKB(lb)->vcc->dev->dev_data;
2553 stat = readl(card->membase + STAT);
2554 card->sbfqc = ns_stat_sfbqc_get(stat);
2555 card->lbfqc = ns_stat_lfbqc_get(stat);
2556
2557 do
2558 {
2559 lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
2560 if (lb == NULL)
2561 break;
2562 NS_SKB_CB(lb)->buf_type = BUF_LG;
2563 skb_queue_tail(&card->lbpool.queue, lb);
2564 skb_reserve(lb, NS_SMBUFSIZE);
2565 push_rxbufs(card, lb);
2566 } while (card->lbfqc < card->lbnr.min);
2567 }
2568
2569
2570
2571 static void ns_hb_destructor(struct sk_buff *hb)
2572 {
2573 ns_dev *card;
2574
2575 card = (ns_dev *) ATM_SKB(hb)->vcc->dev->dev_data;
2576
2577 while (card->hbpool.count < card->hbnr.init)
2578 {
2579 hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
2580 if (hb == NULL)
2581 break;
2582 NS_SKB_CB(hb)->buf_type = BUF_NONE;
2583 skb_queue_tail(&card->hbpool.queue, hb);
2584 card->hbpool.count++;
2585 }
2586 }
2587
2588 #endif /* NS_USE_DESTRUCTORS */
2589
2590
2591 static void recycle_rx_buf(ns_dev *card, struct sk_buff *skb)
2592 {
2593 struct ns_skb_cb *cb = NS_SKB_CB(skb);
2594
2595 if (unlikely(cb->buf_type == BUF_NONE)) {
2596 printk("nicstar%d: What kind of rx buffer is this?\n", card->index);
2597 dev_kfree_skb_any(skb);
2598 } else
2599 push_rxbufs(card, skb);
2600 }
2601
2602
2603 static void recycle_iovec_rx_bufs(ns_dev *card, struct iovec *iov, int count)
2604 {
2605 while (count-- > 0)
2606 recycle_rx_buf(card, (struct sk_buff *) (iov++)->iov_base);
2607 }
2608
2609
2610 static void recycle_iov_buf(ns_dev *card, struct sk_buff *iovb)
2611 {
2612 if (card->iovpool.count < card->iovnr.max)
2613 {
2614 skb_queue_tail(&card->iovpool.queue, iovb);
2615 card->iovpool.count++;
2616 }
2617 else
2618 dev_kfree_skb_any(iovb);
2619 }
2620
2621
2622
2623 static void dequeue_sm_buf(ns_dev *card, struct sk_buff *sb)
2624 {
2625 skb_unlink(sb, &card->sbpool.queue);
2626 #ifdef NS_USE_DESTRUCTORS
2627 if (card->sbfqc < card->sbnr.min)
2628 #else
2629 if (card->sbfqc < card->sbnr.init)
2630 {
2631 struct sk_buff *new_sb;
2632 if ((new_sb = dev_alloc_skb(NS_SMSKBSIZE)) != NULL)
2633 {
2634 NS_SKB_CB(new_sb)->buf_type = BUF_SM;
2635 skb_queue_tail(&card->sbpool.queue, new_sb);
2636 skb_reserve(new_sb, NS_AAL0_HEADER);
2637 push_rxbufs(card, new_sb);
2638 }
2639 }
2640 if (card->sbfqc < card->sbnr.init)
2641 #endif /* NS_USE_DESTRUCTORS */
2642 {
2643 struct sk_buff *new_sb;
2644 if ((new_sb = dev_alloc_skb(NS_SMSKBSIZE)) != NULL)
2645 {
2646 NS_SKB_CB(new_sb)->buf_type = BUF_SM;
2647 skb_queue_tail(&card->sbpool.queue, new_sb);
2648 skb_reserve(new_sb, NS_AAL0_HEADER);
2649 push_rxbufs(card, new_sb);
2650 }
2651 }
2652 }
2653
2654
2655
2656 static void dequeue_lg_buf(ns_dev *card, struct sk_buff *lb)
2657 {
2658 skb_unlink(lb, &card->lbpool.queue);
2659 #ifdef NS_USE_DESTRUCTORS
2660 if (card->lbfqc < card->lbnr.min)
2661 #else
2662 if (card->lbfqc < card->lbnr.init)
2663 {
2664 struct sk_buff *new_lb;
2665 if ((new_lb = dev_alloc_skb(NS_LGSKBSIZE)) != NULL)
2666 {
2667 NS_SKB_CB(new_lb)->buf_type = BUF_LG;
2668 skb_queue_tail(&card->lbpool.queue, new_lb);
2669 skb_reserve(new_lb, NS_SMBUFSIZE);
2670 push_rxbufs(card, new_lb);
2671 }
2672 }
2673 if (card->lbfqc < card->lbnr.init)
2674 #endif /* NS_USE_DESTRUCTORS */
2675 {
2676 struct sk_buff *new_lb;
2677 if ((new_lb = dev_alloc_skb(NS_LGSKBSIZE)) != NULL)
2678 {
2679 NS_SKB_CB(new_lb)->buf_type = BUF_LG;
2680 skb_queue_tail(&card->lbpool.queue, new_lb);
2681 skb_reserve(new_lb, NS_SMBUFSIZE);
2682 push_rxbufs(card, new_lb);
2683 }
2684 }
2685 }
2686
2687
2688
2689 static int ns_proc_read(struct atm_dev *dev, loff_t *pos, char *page)
2690 {
2691 u32 stat;
2692 ns_dev *card;
2693 int left;
2694
2695 left = (int) *pos;
2696 card = (ns_dev *) dev->dev_data;
2697 stat = readl(card->membase + STAT);
2698 if (!left--)
2699 return sprintf(page, "Pool count min init max \n");
2700 if (!left--)
2701 return sprintf(page, "Small %5d %5d %5d %5d \n",
2702 ns_stat_sfbqc_get(stat), card->sbnr.min, card->sbnr.init,
2703 card->sbnr.max);
2704 if (!left--)
2705 return sprintf(page, "Large %5d %5d %5d %5d \n",
2706 ns_stat_lfbqc_get(stat), card->lbnr.min, card->lbnr.init,
2707 card->lbnr.max);
2708 if (!left--)
2709 return sprintf(page, "Huge %5d %5d %5d %5d \n", card->hbpool.count,
2710 card->hbnr.min, card->hbnr.init, card->hbnr.max);
2711 if (!left--)
2712 return sprintf(page, "Iovec %5d %5d %5d %5d \n", card->iovpool.count,
2713 card->iovnr.min, card->iovnr.init, card->iovnr.max);
2714 if (!left--)
2715 {
2716 int retval;
2717 retval = sprintf(page, "Interrupt counter: %u \n", card->intcnt);
2718 card->intcnt = 0;
2719 return retval;
2720 }
2721 #if 0
2722 /* Dump 25.6 Mbps PHY registers */
2723 /* Now there's a 25.6 Mbps PHY driver this code isn't needed. I left it
2724 here just in case it's needed for debugging. */
2725 if (card->max_pcr == ATM_25_PCR && !left--)
2726 {
2727 u32 phy_regs[4];
2728 u32 i;
2729
2730 for (i = 0; i < 4; i++)
2731 {
2732 while (CMD_BUSY(card));
2733 writel(NS_CMD_READ_UTILITY | 0x00000200 | i, card->membase + CMD);
2734 while (CMD_BUSY(card));
2735 phy_regs[i] = readl(card->membase + DR0) & 0x000000FF;
2736 }
2737
2738 return sprintf(page, "PHY regs: 0x%02X 0x%02X 0x%02X 0x%02X \n",
2739 phy_regs[0], phy_regs[1], phy_regs[2], phy_regs[3]);
2740 }
2741 #endif /* 0 - Dump 25.6 Mbps PHY registers */
2742 #if 0
2743 /* Dump TST */
2744 if (left-- < NS_TST_NUM_ENTRIES)
2745 {
2746 if (card->tste2vc[left + 1] == NULL)
2747 return sprintf(page, "%5d - VBR/UBR \n", left + 1);
2748 else
2749 return sprintf(page, "%5d - %d %d \n", left + 1,
2750 card->tste2vc[left + 1]->tx_vcc->vpi,
2751 card->tste2vc[left + 1]->tx_vcc->vci);
2752 }
2753 #endif /* 0 */
2754 return 0;
2755 }
2756
2757
2758
2759 static int ns_ioctl(struct atm_dev *dev, unsigned int cmd, void __user *arg)
2760 {
2761 ns_dev *card;
2762 pool_levels pl;
2763 long btype;
2764 unsigned long flags;
2765
2766 card = dev->dev_data;
2767 switch (cmd)
2768 {
2769 case NS_GETPSTAT:
2770 if (get_user(pl.buftype, &((pool_levels __user *) arg)->buftype))
2771 return -EFAULT;
2772 switch (pl.buftype)
2773 {
2774 case NS_BUFTYPE_SMALL:
2775 pl.count = ns_stat_sfbqc_get(readl(card->membase + STAT));
2776 pl.level.min = card->sbnr.min;
2777 pl.level.init = card->sbnr.init;
2778 pl.level.max = card->sbnr.max;
2779 break;
2780
2781 case NS_BUFTYPE_LARGE:
2782 pl.count = ns_stat_lfbqc_get(readl(card->membase + STAT));
2783 pl.level.min = card->lbnr.min;
2784 pl.level.init = card->lbnr.init;
2785 pl.level.max = card->lbnr.max;
2786 break;
2787
2788 case NS_BUFTYPE_HUGE:
2789 pl.count = card->hbpool.count;
2790 pl.level.min = card->hbnr.min;
2791 pl.level.init = card->hbnr.init;
2792 pl.level.max = card->hbnr.max;
2793 break;
2794
2795 case NS_BUFTYPE_IOVEC:
2796 pl.count = card->iovpool.count;
2797 pl.level.min = card->iovnr.min;
2798 pl.level.init = card->iovnr.init;
2799 pl.level.max = card->iovnr.max;
2800 break;
2801
2802 default:
2803 return -ENOIOCTLCMD;
2804
2805 }
2806 if (!copy_to_user((pool_levels __user *) arg, &pl, sizeof(pl)))
2807 return (sizeof(pl));
2808 else
2809 return -EFAULT;
2810
2811 case NS_SETBUFLEV:
2812 if (!capable(CAP_NET_ADMIN))
2813 return -EPERM;
2814 if (copy_from_user(&pl, (pool_levels __user *) arg, sizeof(pl)))
2815 return -EFAULT;
2816 if (pl.level.min >= pl.level.init || pl.level.init >= pl.level.max)
2817 return -EINVAL;
2818 if (pl.level.min == 0)
2819 return -EINVAL;
2820 switch (pl.buftype)
2821 {
2822 case NS_BUFTYPE_SMALL:
2823 if (pl.level.max > TOP_SB)
2824 return -EINVAL;
2825 card->sbnr.min = pl.level.min;
2826 card->sbnr.init = pl.level.init;
2827 card->sbnr.max = pl.level.max;
2828 break;
2829
2830 case NS_BUFTYPE_LARGE:
2831 if (pl.level.max > TOP_LB)
2832 return -EINVAL;
2833 card->lbnr.min = pl.level.min;
2834 card->lbnr.init = pl.level.init;
2835 card->lbnr.max = pl.level.max;
2836 break;
2837
2838 case NS_BUFTYPE_HUGE:
2839 if (pl.level.max > TOP_HB)
2840 return -EINVAL;
2841 card->hbnr.min = pl.level.min;
2842 card->hbnr.init = pl.level.init;
2843 card->hbnr.max = pl.level.max;
2844 break;
2845
2846 case NS_BUFTYPE_IOVEC:
2847 if (pl.level.max > TOP_IOVB)
2848 return -EINVAL;
2849 card->iovnr.min = pl.level.min;
2850 card->iovnr.init = pl.level.init;
2851 card->iovnr.max = pl.level.max;
2852 break;
2853
2854 default:
2855 return -EINVAL;
2856
2857 }
2858 return 0;
2859
2860 case NS_ADJBUFLEV:
2861 if (!capable(CAP_NET_ADMIN))
2862 return -EPERM;
2863 btype = (long) arg; /* a long is the same size as a pointer or bigger */
2864 switch (btype)
2865 {
2866 case NS_BUFTYPE_SMALL:
2867 while (card->sbfqc < card->sbnr.init)
2868 {
2869 struct sk_buff *sb;
2870
2871 sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
2872 if (sb == NULL)
2873 return -ENOMEM;
2874 NS_SKB_CB(sb)->buf_type = BUF_SM;
2875 skb_queue_tail(&card->sbpool.queue, sb);
2876 skb_reserve(sb, NS_AAL0_HEADER);
2877 push_rxbufs(card, sb);
2878 }
2879 break;
2880
2881 case NS_BUFTYPE_LARGE:
2882 while (card->lbfqc < card->lbnr.init)
2883 {
2884 struct sk_buff *lb;
2885
2886 lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
2887 if (lb == NULL)
2888 return -ENOMEM;
2889 NS_SKB_CB(lb)->buf_type = BUF_LG;
2890 skb_queue_tail(&card->lbpool.queue, lb);
2891 skb_reserve(lb, NS_SMBUFSIZE);
2892 push_rxbufs(card, lb);
2893 }
2894 break;
2895
2896 case NS_BUFTYPE_HUGE:
2897 while (card->hbpool.count > card->hbnr.init)
2898 {
2899 struct sk_buff *hb;
2900
2901 ns_grab_int_lock(card, flags);
2902 hb = skb_dequeue(&card->hbpool.queue);
2903 card->hbpool.count--;
2904 spin_unlock_irqrestore(&card->int_lock, flags);
2905 if (hb == NULL)
2906 printk("nicstar%d: huge buffer count inconsistent.\n",
2907 card->index);
2908 else
2909 dev_kfree_skb_any(hb);
2910
2911 }
2912 while (card->hbpool.count < card->hbnr.init)
2913 {
2914 struct sk_buff *hb;
2915
2916 hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
2917 if (hb == NULL)
2918 return -ENOMEM;
2919 NS_SKB_CB(hb)->buf_type = BUF_NONE;
2920 ns_grab_int_lock(card, flags);
2921 skb_queue_tail(&card->hbpool.queue, hb);
2922 card->hbpool.count++;
2923 spin_unlock_irqrestore(&card->int_lock, flags);
2924 }
2925 break;
2926
2927 case NS_BUFTYPE_IOVEC:
2928 while (card->iovpool.count > card->iovnr.init)
2929 {
2930 struct sk_buff *iovb;
2931
2932 ns_grab_int_lock(card, flags);
2933 iovb = skb_dequeue(&card->iovpool.queue);
2934 card->iovpool.count--;
2935 spin_unlock_irqrestore(&card->int_lock, flags);
2936 if (iovb == NULL)
2937 printk("nicstar%d: iovec buffer count inconsistent.\n",
2938 card->index);
2939 else
2940 dev_kfree_skb_any(iovb);
2941
2942 }
2943 while (card->iovpool.count < card->iovnr.init)
2944 {
2945 struct sk_buff *iovb;
2946
2947 iovb = alloc_skb(NS_IOVBUFSIZE, GFP_KERNEL);
2948 if (iovb == NULL)
2949 return -ENOMEM;
2950 NS_SKB_CB(iovb)->buf_type = BUF_NONE;
2951 ns_grab_int_lock(card, flags);
2952 skb_queue_tail(&card->iovpool.queue, iovb);
2953 card->iovpool.count++;
2954 spin_unlock_irqrestore(&card->int_lock, flags);
2955 }
2956 break;
2957
2958 default:
2959 return -EINVAL;
2960
2961 }
2962 return 0;
2963
2964 default:
2965 if (dev->phy && dev->phy->ioctl) {
2966 return dev->phy->ioctl(dev, cmd, arg);
2967 }
2968 else {
2969 printk("nicstar%d: %s == NULL \n", card->index,
2970 dev->phy ? "dev->phy->ioctl" : "dev->phy");
2971 return -ENOIOCTLCMD;
2972 }
2973 }
2974 }
2975
2976
2977 static void which_list(ns_dev *card, struct sk_buff *skb)
2978 {
2979 printk("skb buf_type: 0x%08x\n", NS_SKB_CB(skb)->buf_type);
2980 }
2981
2982
2983 static void ns_poll(unsigned long arg)
2984 {
2985 int i;
2986 ns_dev *card;
2987 unsigned long flags;
2988 u32 stat_r, stat_w;
2989
2990 PRINTK("nicstar: Entering ns_poll().\n");
2991 for (i = 0; i < num_cards; i++)
2992 {
2993 card = cards[i];
2994 if (spin_is_locked(&card->int_lock)) {
2995 /* Probably it isn't worth spinning */
2996 continue;
2997 }
2998 ns_grab_int_lock(card, flags);
2999
3000 stat_w = 0;
3001 stat_r = readl(card->membase + STAT);
3002 if (stat_r & NS_STAT_TSIF)
3003 stat_w |= NS_STAT_TSIF;
3004 if (stat_r & NS_STAT_EOPDU)
3005 stat_w |= NS_STAT_EOPDU;
3006
3007 process_tsq(card);
3008 process_rsq(card);
3009
3010 writel(stat_w, card->membase + STAT);
3011 spin_unlock_irqrestore(&card->int_lock, flags);
3012 }
3013 mod_timer(&ns_timer, jiffies + NS_POLL_PERIOD);
3014 PRINTK("nicstar: Leaving ns_poll().\n");
3015 }
3016
3017
3018
3019 static int ns_parse_mac(char *mac, unsigned char *esi)
3020 {
3021 int i, j;
3022 short byte1, byte0;
3023
3024 if (mac == NULL || esi == NULL)
3025 return -1;
3026 j = 0;
3027 for (i = 0; i < 6; i++)
3028 {
3029 if ((byte1 = ns_h2i(mac[j++])) < 0)
3030 return -1;
3031 if ((byte0 = ns_h2i(mac[j++])) < 0)
3032 return -1;
3033 esi[i] = (unsigned char) (byte1 * 16 + byte0);
3034 if (i < 5)
3035 {
3036 if (mac[j++] != ':')
3037 return -1;
3038 }
3039 }
3040 return 0;
3041 }
3042
3043
3044
3045 static short ns_h2i(char c)
3046 {
3047 if (c >= '0' && c <= '9')
3048 return (short) (c - '0');
3049 if (c >= 'A' && c <= 'F')
3050 return (short) (c - 'A' + 10);
3051 if (c >= 'a' && c <= 'f')
3052 return (short) (c - 'a' + 10);
3053 return -1;
3054 }
3055
3056
3057
3058 static void ns_phy_put(struct atm_dev *dev, unsigned char value,
3059 unsigned long addr)
3060 {
3061 ns_dev *card;
3062 unsigned long flags;
3063
3064 card = dev->dev_data;
3065 ns_grab_res_lock(card, flags);
3066 while(CMD_BUSY(card));
3067 writel((unsigned long) value, card->membase + DR0);
3068 writel(NS_CMD_WRITE_UTILITY | 0x00000200 | (addr & 0x000000FF),
3069 card->membase + CMD);
3070 spin_unlock_irqrestore(&card->res_lock, flags);
3071 }
3072
3073
3074
3075 static unsigned char ns_phy_get(struct atm_dev *dev, unsigned long addr)
3076 {
3077 ns_dev *card;
3078 unsigned long flags;
3079 unsigned long data;
3080
3081 card = dev->dev_data;
3082 ns_grab_res_lock(card, flags);
3083 while(CMD_BUSY(card));
3084 writel(NS_CMD_READ_UTILITY | 0x00000200 | (addr & 0x000000FF),
3085 card->membase + CMD);
3086 while(CMD_BUSY(card));
3087 data = readl(card->membase + DR0) & 0x000000FF;
3088 spin_unlock_irqrestore(&card->res_lock, flags);
3089 return (unsigned char) data;
3090 }
3091
3092
3093
3094 module_init(nicstar_init);
3095 module_exit(nicstar_cleanup);
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