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drm/i915: range-restricted eviction support
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / atm / nicstar.c
blob2f3516b7f118cd59e7b9156ba1b004a6caee6c86
1 /*
2 * nicstar.c
3 *
4 * Device driver supporting CBR for IDT 77201/77211 "NICStAR" based cards.
5 *
6 * IMPORTANT: The included file nicstarmac.c was NOT WRITTEN BY ME.
7 * It was taken from the frle-0.22 device driver.
8 * As the file doesn't have a copyright notice, in the file
9 * nicstarmac.copyright I put the copyright notice from the
10 * frle-0.22 device driver.
11 * Some code is based on the nicstar driver by M. Welsh.
12 *
13 * Author: Rui Prior (rprior@inescn.pt)
14 * PowerPC support by Jay Talbott (jay_talbott@mcg.mot.com) April 1999
15 *
16 *
17 * (C) INESC 1999
18 */
19
20 /*
21 * IMPORTANT INFORMATION
22 *
23 * There are currently three types of spinlocks:
24 *
25 * 1 - Per card interrupt spinlock (to protect structures and such)
26 * 2 - Per SCQ scq spinlock
27 * 3 - Per card resource spinlock (to access registers, etc.)
28 *
29 * These must NEVER be grabbed in reverse order.
30 *
31 */
32
33 /* Header files */
34
35 #include <linux/module.h>
36 #include <linux/kernel.h>
37 #include <linux/skbuff.h>
38 #include <linux/atmdev.h>
39 #include <linux/atm.h>
40 #include <linux/pci.h>
41 #include <linux/dma-mapping.h>
42 #include <linux/types.h>
43 #include <linux/string.h>
44 #include <linux/delay.h>
45 #include <linux/init.h>
46 #include <linux/sched.h>
47 #include <linux/timer.h>
48 #include <linux/interrupt.h>
49 #include <linux/bitops.h>
50 #include <linux/slab.h>
51 #include <linux/idr.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 /* Additional code */
64
65 #include "nicstarmac.c"
66
67 /* Configurable parameters */
68
69 #undef PHY_LOOPBACK
70 #undef TX_DEBUG
71 #undef RX_DEBUG
72 #undef GENERAL_DEBUG
73 #undef EXTRA_DEBUG
74
75 #undef NS_USE_DESTRUCTORS /* For now keep this undefined unless you know
76 you're going to use only raw ATM */
77
78 /* Do not touch these */
79
80 #ifdef TX_DEBUG
81 #define TXPRINTK(args...) printk(args)
82 #else
83 #define TXPRINTK(args...)
84 #endif /* TX_DEBUG */
85
86 #ifdef RX_DEBUG
87 #define RXPRINTK(args...) printk(args)
88 #else
89 #define RXPRINTK(args...)
90 #endif /* RX_DEBUG */
91
92 #ifdef GENERAL_DEBUG
93 #define PRINTK(args...) printk(args)
94 #else
95 #define PRINTK(args...)
96 #endif /* GENERAL_DEBUG */
97
98 #ifdef EXTRA_DEBUG
99 #define XPRINTK(args...) printk(args)
100 #else
101 #define XPRINTK(args...)
102 #endif /* EXTRA_DEBUG */
103
104 /* Macros */
105
106 #define CMD_BUSY(card) (readl((card)->membase + STAT) & NS_STAT_CMDBZ)
107
108 #define NS_DELAY mdelay(1)
109
110 #define PTR_DIFF(a, b) ((u32)((unsigned long)(a) - (unsigned long)(b)))
111
112 #ifndef ATM_SKB
113 #define ATM_SKB(s) (&(s)->atm)
114 #endif
115
116 #define scq_virt_to_bus(scq, p) \
117 (scq->dma + ((unsigned long)(p) - (unsigned long)(scq)->org))
118
119 /* Function declarations */
120
121 static u32 ns_read_sram(ns_dev * card, u32 sram_address);
122 static void ns_write_sram(ns_dev * card, u32 sram_address, u32 * value,
123 int count);
124 static int __devinit ns_init_card(int i, struct pci_dev *pcidev);
125 static void __devinit ns_init_card_error(ns_dev * card, int error);
126 static scq_info *get_scq(ns_dev *card, int size, u32 scd);
127 static void free_scq(ns_dev *card, scq_info * scq, struct atm_vcc *vcc);
128 static void push_rxbufs(ns_dev *, struct sk_buff *);
129 static irqreturn_t ns_irq_handler(int irq, void *dev_id);
130 static int ns_open(struct atm_vcc *vcc);
131 static void ns_close(struct atm_vcc *vcc);
132 static void fill_tst(ns_dev * card, int n, vc_map * vc);
133 static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb);
134 static int push_scqe(ns_dev * card, vc_map * vc, scq_info * scq, ns_scqe * tbd,
135 struct sk_buff *skb);
136 static void process_tsq(ns_dev * card);
137 static void drain_scq(ns_dev * card, scq_info * scq, int pos);
138 static void process_rsq(ns_dev * card);
139 static void dequeue_rx(ns_dev * card, ns_rsqe * rsqe);
140 #ifdef NS_USE_DESTRUCTORS
141 static void ns_sb_destructor(struct sk_buff *sb);
142 static void ns_lb_destructor(struct sk_buff *lb);
143 static void ns_hb_destructor(struct sk_buff *hb);
144 #endif /* NS_USE_DESTRUCTORS */
145 static void recycle_rx_buf(ns_dev * card, struct sk_buff *skb);
146 static void recycle_iovec_rx_bufs(ns_dev * card, struct iovec *iov, int count);
147 static void recycle_iov_buf(ns_dev * card, struct sk_buff *iovb);
148 static void dequeue_sm_buf(ns_dev * card, struct sk_buff *sb);
149 static void dequeue_lg_buf(ns_dev * card, struct sk_buff *lb);
150 static int ns_proc_read(struct atm_dev *dev, loff_t * pos, char *page);
151 static int ns_ioctl(struct atm_dev *dev, unsigned int cmd, void __user * arg);
152 #ifdef EXTRA_DEBUG
153 static void which_list(ns_dev * card, struct sk_buff *skb);
154 #endif
155 static void ns_poll(unsigned long arg);
156 static int ns_parse_mac(char *mac, unsigned char *esi);
157 static void ns_phy_put(struct atm_dev *dev, unsigned char value,
158 unsigned long addr);
159 static unsigned char ns_phy_get(struct atm_dev *dev, unsigned long addr);
160
161 /* Global variables */
162
163 static struct ns_dev *cards[NS_MAX_CARDS];
164 static unsigned num_cards;
165 static struct atmdev_ops atm_ops = {
166 .open = ns_open,
167 .close = ns_close,
168 .ioctl = ns_ioctl,
169 .send = ns_send,
170 .phy_put = ns_phy_put,
171 .phy_get = ns_phy_get,
172 .proc_read = ns_proc_read,
173 .owner = THIS_MODULE,
174 };
175
176 static struct timer_list ns_timer;
177 static char *mac[NS_MAX_CARDS];
178 module_param_array(mac, charp, NULL, 0);
179 MODULE_LICENSE("GPL");
180
181 /* Functions */
182
183 static int __devinit nicstar_init_one(struct pci_dev *pcidev,
184 const struct pci_device_id *ent)
185 {
186 static int index = -1;
187 unsigned int error;
188
189 index++;
190 cards[index] = NULL;
191
192 error = ns_init_card(index, pcidev);
193 if (error) {
194 cards[index--] = NULL; /* don't increment index */
195 goto err_out;
196 }
197
198 return 0;
199 err_out:
200 return -ENODEV;
201 }
202
203 static void __devexit nicstar_remove_one(struct pci_dev *pcidev)
204 {
205 int i, j;
206 ns_dev *card = pci_get_drvdata(pcidev);
207 struct sk_buff *hb;
208 struct sk_buff *iovb;
209 struct sk_buff *lb;
210 struct sk_buff *sb;
211
212 i = card->index;
213
214 if (cards[i] == NULL)
215 return;
216
217 if (card->atmdev->phy && card->atmdev->phy->stop)
218 card->atmdev->phy->stop(card->atmdev);
219
220 /* Stop everything */
221 writel(0x00000000, card->membase + CFG);
222
223 /* De-register device */
224 atm_dev_deregister(card->atmdev);
225
226 /* Disable PCI device */
227 pci_disable_device(pcidev);
228
229 /* Free up resources */
230 j = 0;
231 PRINTK("nicstar%d: freeing %d huge buffers.\n", i, card->hbpool.count);
232 while ((hb = skb_dequeue(&card->hbpool.queue)) != NULL) {
233 dev_kfree_skb_any(hb);
234 j++;
235 }
236 PRINTK("nicstar%d: %d huge buffers freed.\n", i, j);
237 j = 0;
238 PRINTK("nicstar%d: freeing %d iovec buffers.\n", i,
239 card->iovpool.count);
240 while ((iovb = skb_dequeue(&card->iovpool.queue)) != NULL) {
241 dev_kfree_skb_any(iovb);
242 j++;
243 }
244 PRINTK("nicstar%d: %d iovec buffers freed.\n", i, j);
245 while ((lb = skb_dequeue(&card->lbpool.queue)) != NULL)
246 dev_kfree_skb_any(lb);
247 while ((sb = skb_dequeue(&card->sbpool.queue)) != NULL)
248 dev_kfree_skb_any(sb);
249 free_scq(card, card->scq0, NULL);
250 for (j = 0; j < NS_FRSCD_NUM; j++) {
251 if (card->scd2vc[j] != NULL)
252 free_scq(card, card->scd2vc[j]->scq, card->scd2vc[j]->tx_vcc);
253 }
254 idr_remove_all(&card->idr);
255 idr_destroy(&card->idr);
256 pci_free_consistent(card->pcidev, NS_RSQSIZE + NS_RSQ_ALIGNMENT,
257 card->rsq.org, card->rsq.dma);
258 pci_free_consistent(card->pcidev, NS_TSQSIZE + NS_TSQ_ALIGNMENT,
259 card->tsq.org, card->tsq.dma);
260 free_irq(card->pcidev->irq, card);
261 iounmap(card->membase);
262 kfree(card);
263 }
264
265 static struct pci_device_id nicstar_pci_tbl[] __devinitdata = {
266 { PCI_VDEVICE(IDT, PCI_DEVICE_ID_IDT_IDT77201), 0 },
267 {0,} /* terminate list */
268 };
269
270 MODULE_DEVICE_TABLE(pci, nicstar_pci_tbl);
271
272 static struct pci_driver nicstar_driver = {
273 .name = "nicstar",
274 .id_table = nicstar_pci_tbl,
275 .probe = nicstar_init_one,
276 .remove = __devexit_p(nicstar_remove_one),
277 };
278
279 static int __init nicstar_init(void)
280 {
281 unsigned error = 0; /* Initialized to remove compile warning */
282
283 XPRINTK("nicstar: nicstar_init() called.\n");
284
285 error = pci_register_driver(&nicstar_driver);
286
287 TXPRINTK("nicstar: TX debug enabled.\n");
288 RXPRINTK("nicstar: RX debug enabled.\n");
289 PRINTK("nicstar: General debug enabled.\n");
290 #ifdef PHY_LOOPBACK
291 printk("nicstar: using PHY loopback.\n");
292 #endif /* PHY_LOOPBACK */
293 XPRINTK("nicstar: nicstar_init() returned.\n");
294
295 if (!error) {
296 init_timer(&ns_timer);
297 ns_timer.expires = jiffies + NS_POLL_PERIOD;
298 ns_timer.data = 0UL;
299 ns_timer.function = ns_poll;
300 add_timer(&ns_timer);
301 }
302
303 return error;
304 }
305
306 static void __exit nicstar_cleanup(void)
307 {
308 XPRINTK("nicstar: nicstar_cleanup() called.\n");
309
310 del_timer(&ns_timer);
311
312 pci_unregister_driver(&nicstar_driver);
313
314 XPRINTK("nicstar: nicstar_cleanup() returned.\n");
315 }
316
317 static u32 ns_read_sram(ns_dev * card, u32 sram_address)
318 {
319 unsigned long flags;
320 u32 data;
321 sram_address <<= 2;
322 sram_address &= 0x0007FFFC; /* address must be dword aligned */
323 sram_address |= 0x50000000; /* SRAM read command */
324 spin_lock_irqsave(&card->res_lock, flags);
325 while (CMD_BUSY(card)) ;
326 writel(sram_address, card->membase + CMD);
327 while (CMD_BUSY(card)) ;
328 data = readl(card->membase + DR0);
329 spin_unlock_irqrestore(&card->res_lock, flags);
330 return data;
331 }
332
333 static void ns_write_sram(ns_dev * card, u32 sram_address, u32 * value,
334 int count)
335 {
336 unsigned long flags;
337 int i, c;
338 count--; /* count range now is 0..3 instead of 1..4 */
339 c = count;
340 c <<= 2; /* to use increments of 4 */
341 spin_lock_irqsave(&card->res_lock, flags);
342 while (CMD_BUSY(card)) ;
343 for (i = 0; i <= c; i += 4)
344 writel(*(value++), card->membase + i);
345 /* Note: DR# registers are the first 4 dwords in nicstar's memspace,
346 so card->membase + DR0 == card->membase */
347 sram_address <<= 2;
348 sram_address &= 0x0007FFFC;
349 sram_address |= (0x40000000 | count);
350 writel(sram_address, card->membase + CMD);
351 spin_unlock_irqrestore(&card->res_lock, flags);
352 }
353
354 static int __devinit ns_init_card(int i, struct pci_dev *pcidev)
355 {
356 int j;
357 struct ns_dev *card = NULL;
358 unsigned char pci_latency;
359 unsigned error;
360 u32 data;
361 u32 u32d[4];
362 u32 ns_cfg_rctsize;
363 int bcount;
364 unsigned long membase;
365
366 error = 0;
367
368 if (pci_enable_device(pcidev)) {
369 printk("nicstar%d: can't enable PCI device\n", i);
370 error = 2;
371 ns_init_card_error(card, error);
372 return error;
373 }
374 if ((pci_set_dma_mask(pcidev, DMA_BIT_MASK(32)) != 0) ||
375 (pci_set_consistent_dma_mask(pcidev, DMA_BIT_MASK(32)) != 0)) {
376 printk(KERN_WARNING
377 "nicstar%d: No suitable DMA available.\n", i);
378 error = 2;
379 ns_init_card_error(card, error);
380 return error;
381 }
382
383 if ((card = kmalloc(sizeof(ns_dev), GFP_KERNEL)) == NULL) {
384 printk
385 ("nicstar%d: can't allocate memory for device structure.\n",
386 i);
387 error = 2;
388 ns_init_card_error(card, error);
389 return error;
390 }
391 cards[i] = card;
392 spin_lock_init(&card->int_lock);
393 spin_lock_init(&card->res_lock);
394
395 pci_set_drvdata(pcidev, card);
396
397 card->index = i;
398 card->atmdev = NULL;
399 card->pcidev = pcidev;
400 membase = pci_resource_start(pcidev, 1);
401 card->membase = ioremap(membase, NS_IOREMAP_SIZE);
402 if (!card->membase) {
403 printk("nicstar%d: can't ioremap() membase.\n", i);
404 error = 3;
405 ns_init_card_error(card, error);
406 return error;
407 }
408 PRINTK("nicstar%d: membase at 0x%p.\n", i, card->membase);
409
410 pci_set_master(pcidev);
411
412 if (pci_read_config_byte(pcidev, PCI_LATENCY_TIMER, &pci_latency) != 0) {
413 printk("nicstar%d: can't read PCI latency timer.\n", i);
414 error = 6;
415 ns_init_card_error(card, error);
416 return error;
417 }
418 #ifdef NS_PCI_LATENCY
419 if (pci_latency < NS_PCI_LATENCY) {
420 PRINTK("nicstar%d: setting PCI latency timer to %d.\n", i,
421 NS_PCI_LATENCY);
422 for (j = 1; j < 4; j++) {
423 if (pci_write_config_byte
424 (pcidev, PCI_LATENCY_TIMER, NS_PCI_LATENCY) != 0)
425 break;
426 }
427 if (j == 4) {
428 printk
429 ("nicstar%d: can't set PCI latency timer to %d.\n",
430 i, NS_PCI_LATENCY);
431 error = 7;
432 ns_init_card_error(card, error);
433 return error;
434 }
435 }
436 #endif /* NS_PCI_LATENCY */
437
438 /* Clear timer overflow */
439 data = readl(card->membase + STAT);
440 if (data & NS_STAT_TMROF)
441 writel(NS_STAT_TMROF, card->membase + STAT);
442
443 /* Software reset */
444 writel(NS_CFG_SWRST, card->membase + CFG);
445 NS_DELAY;
446 writel(0x00000000, card->membase + CFG);
447
448 /* PHY reset */
449 writel(0x00000008, card->membase + GP);
450 NS_DELAY;
451 writel(0x00000001, card->membase + GP);
452 NS_DELAY;
453 while (CMD_BUSY(card)) ;
454 writel(NS_CMD_WRITE_UTILITY | 0x00000100, card->membase + CMD); /* Sync UTOPIA with SAR clock */
455 NS_DELAY;
456
457 /* Detect PHY type */
458 while (CMD_BUSY(card)) ;
459 writel(NS_CMD_READ_UTILITY | 0x00000200, card->membase + CMD);
460 while (CMD_BUSY(card)) ;
461 data = readl(card->membase + DR0);
462 switch (data) {
463 case 0x00000009:
464 printk("nicstar%d: PHY seems to be 25 Mbps.\n", i);
465 card->max_pcr = ATM_25_PCR;
466 while (CMD_BUSY(card)) ;
467 writel(0x00000008, card->membase + DR0);
468 writel(NS_CMD_WRITE_UTILITY | 0x00000200, card->membase + CMD);
469 /* Clear an eventual pending interrupt */
470 writel(NS_STAT_SFBQF, card->membase + STAT);
471 #ifdef PHY_LOOPBACK
472 while (CMD_BUSY(card)) ;
473 writel(0x00000022, card->membase + DR0);
474 writel(NS_CMD_WRITE_UTILITY | 0x00000202, card->membase + CMD);
475 #endif /* PHY_LOOPBACK */
476 break;
477 case 0x00000030:
478 case 0x00000031:
479 printk("nicstar%d: PHY seems to be 155 Mbps.\n", i);
480 card->max_pcr = ATM_OC3_PCR;
481 #ifdef PHY_LOOPBACK
482 while (CMD_BUSY(card)) ;
483 writel(0x00000002, card->membase + DR0);
484 writel(NS_CMD_WRITE_UTILITY | 0x00000205, card->membase + CMD);
485 #endif /* PHY_LOOPBACK */
486 break;
487 default:
488 printk("nicstar%d: unknown PHY type (0x%08X).\n", i, data);
489 error = 8;
490 ns_init_card_error(card, error);
491 return error;
492 }
493 writel(0x00000000, card->membase + GP);
494
495 /* Determine SRAM size */
496 data = 0x76543210;
497 ns_write_sram(card, 0x1C003, &data, 1);
498 data = 0x89ABCDEF;
499 ns_write_sram(card, 0x14003, &data, 1);
500 if (ns_read_sram(card, 0x14003) == 0x89ABCDEF &&
501 ns_read_sram(card, 0x1C003) == 0x76543210)
502 card->sram_size = 128;
503 else
504 card->sram_size = 32;
505 PRINTK("nicstar%d: %dK x 32bit SRAM size.\n", i, card->sram_size);
506
507 card->rct_size = NS_MAX_RCTSIZE;
508
509 #if (NS_MAX_RCTSIZE == 4096)
510 if (card->sram_size == 128)
511 printk
512 ("nicstar%d: limiting maximum VCI. See NS_MAX_RCTSIZE in nicstar.h\n",
513 i);
514 #elif (NS_MAX_RCTSIZE == 16384)
515 if (card->sram_size == 32) {
516 printk
517 ("nicstar%d: wasting memory. See NS_MAX_RCTSIZE in nicstar.h\n",
518 i);
519 card->rct_size = 4096;
520 }
521 #else
522 #error NS_MAX_RCTSIZE must be either 4096 or 16384 in nicstar.c
523 #endif
524
525 card->vpibits = NS_VPIBITS;
526 if (card->rct_size == 4096)
527 card->vcibits = 12 - NS_VPIBITS;
528 else /* card->rct_size == 16384 */
529 card->vcibits = 14 - NS_VPIBITS;
530
531 /* Initialize the nicstar eeprom/eprom stuff, for the MAC addr */
532 if (mac[i] == NULL)
533 nicstar_init_eprom(card->membase);
534
535 /* Set the VPI/VCI MSb mask to zero so we can receive OAM cells */
536 writel(0x00000000, card->membase + VPM);
537
538 /* Initialize TSQ */
539 card->tsq.org = pci_alloc_consistent(card->pcidev,
540 NS_TSQSIZE + NS_TSQ_ALIGNMENT,
541 &card->tsq.dma);
542 if (card->tsq.org == NULL) {
543 printk("nicstar%d: can't allocate TSQ.\n", i);
544 error = 10;
545 ns_init_card_error(card, error);
546 return error;
547 }
548 card->tsq.base = PTR_ALIGN(card->tsq.org, NS_TSQ_ALIGNMENT);
549 card->tsq.next = card->tsq.base;
550 card->tsq.last = card->tsq.base + (NS_TSQ_NUM_ENTRIES - 1);
551 for (j = 0; j < NS_TSQ_NUM_ENTRIES; j++)
552 ns_tsi_init(card->tsq.base + j);
553 writel(0x00000000, card->membase + TSQH);
554 writel(ALIGN(card->tsq.dma, NS_TSQ_ALIGNMENT), card->membase + TSQB);
555 PRINTK("nicstar%d: TSQ base at 0x%p.\n", i, card->tsq.base);
556
557 /* Initialize RSQ */
558 card->rsq.org = pci_alloc_consistent(card->pcidev,
559 NS_RSQSIZE + NS_RSQ_ALIGNMENT,
560 &card->rsq.dma);
561 if (card->rsq.org == NULL) {
562 printk("nicstar%d: can't allocate RSQ.\n", i);
563 error = 11;
564 ns_init_card_error(card, error);
565 return error;
566 }
567 card->rsq.base = PTR_ALIGN(card->rsq.org, NS_RSQ_ALIGNMENT);
568 card->rsq.next = card->rsq.base;
569 card->rsq.last = card->rsq.base + (NS_RSQ_NUM_ENTRIES - 1);
570 for (j = 0; j < NS_RSQ_NUM_ENTRIES; j++)
571 ns_rsqe_init(card->rsq.base + j);
572 writel(0x00000000, card->membase + RSQH);
573 writel(ALIGN(card->rsq.dma, NS_RSQ_ALIGNMENT), card->membase + RSQB);
574 PRINTK("nicstar%d: RSQ base at 0x%p.\n", i, card->rsq.base);
575
576 /* Initialize SCQ0, the only VBR SCQ used */
577 card->scq1 = NULL;
578 card->scq2 = NULL;
579 card->scq0 = get_scq(card, VBR_SCQSIZE, NS_VRSCD0);
580 if (card->scq0 == NULL) {
581 printk("nicstar%d: can't get SCQ0.\n", i);
582 error = 12;
583 ns_init_card_error(card, error);
584 return error;
585 }
586 u32d[0] = scq_virt_to_bus(card->scq0, card->scq0->base);
587 u32d[1] = (u32) 0x00000000;
588 u32d[2] = (u32) 0xffffffff;
589 u32d[3] = (u32) 0x00000000;
590 ns_write_sram(card, NS_VRSCD0, u32d, 4);
591 ns_write_sram(card, NS_VRSCD1, u32d, 4); /* These last two won't be used */
592 ns_write_sram(card, NS_VRSCD2, u32d, 4); /* but are initialized, just in case... */
593 card->scq0->scd = NS_VRSCD0;
594 PRINTK("nicstar%d: VBR-SCQ0 base at 0x%p.\n", i, card->scq0->base);
595
596 /* Initialize TSTs */
597 card->tst_addr = NS_TST0;
598 card->tst_free_entries = NS_TST_NUM_ENTRIES;
599 data = NS_TST_OPCODE_VARIABLE;
600 for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
601 ns_write_sram(card, NS_TST0 + j, &data, 1);
602 data = ns_tste_make(NS_TST_OPCODE_END, NS_TST0);
603 ns_write_sram(card, NS_TST0 + NS_TST_NUM_ENTRIES, &data, 1);
604 for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
605 ns_write_sram(card, NS_TST1 + j, &data, 1);
606 data = ns_tste_make(NS_TST_OPCODE_END, NS_TST1);
607 ns_write_sram(card, NS_TST1 + NS_TST_NUM_ENTRIES, &data, 1);
608 for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
609 card->tste2vc[j] = NULL;
610 writel(NS_TST0 << 2, card->membase + TSTB);
611
612 /* Initialize RCT. AAL type is set on opening the VC. */
613 #ifdef RCQ_SUPPORT
614 u32d[0] = NS_RCTE_RAWCELLINTEN;
615 #else
616 u32d[0] = 0x00000000;
617 #endif /* RCQ_SUPPORT */
618 u32d[1] = 0x00000000;
619 u32d[2] = 0x00000000;
620 u32d[3] = 0xFFFFFFFF;
621 for (j = 0; j < card->rct_size; j++)
622 ns_write_sram(card, j * 4, u32d, 4);
623
624 memset(card->vcmap, 0, NS_MAX_RCTSIZE * sizeof(vc_map));
625
626 for (j = 0; j < NS_FRSCD_NUM; j++)
627 card->scd2vc[j] = NULL;
628
629 /* Initialize buffer levels */
630 card->sbnr.min = MIN_SB;
631 card->sbnr.init = NUM_SB;
632 card->sbnr.max = MAX_SB;
633 card->lbnr.min = MIN_LB;
634 card->lbnr.init = NUM_LB;
635 card->lbnr.max = MAX_LB;
636 card->iovnr.min = MIN_IOVB;
637 card->iovnr.init = NUM_IOVB;
638 card->iovnr.max = MAX_IOVB;
639 card->hbnr.min = MIN_HB;
640 card->hbnr.init = NUM_HB;
641 card->hbnr.max = MAX_HB;
642
643 card->sm_handle = 0x00000000;
644 card->sm_addr = 0x00000000;
645 card->lg_handle = 0x00000000;
646 card->lg_addr = 0x00000000;
647
648 card->efbie = 1; /* To prevent push_rxbufs from enabling the interrupt */
649
650 idr_init(&card->idr);
651
652 /* Pre-allocate some huge buffers */
653 skb_queue_head_init(&card->hbpool.queue);
654 card->hbpool.count = 0;
655 for (j = 0; j < NUM_HB; j++) {
656 struct sk_buff *hb;
657 hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
658 if (hb == NULL) {
659 printk
660 ("nicstar%d: can't allocate %dth of %d huge buffers.\n",
661 i, j, NUM_HB);
662 error = 13;
663 ns_init_card_error(card, error);
664 return error;
665 }
666 NS_PRV_BUFTYPE(hb) = BUF_NONE;
667 skb_queue_tail(&card->hbpool.queue, hb);
668 card->hbpool.count++;
669 }
670
671 /* Allocate large buffers */
672 skb_queue_head_init(&card->lbpool.queue);
673 card->lbpool.count = 0; /* Not used */
674 for (j = 0; j < NUM_LB; j++) {
675 struct sk_buff *lb;
676 lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
677 if (lb == NULL) {
678 printk
679 ("nicstar%d: can't allocate %dth of %d large buffers.\n",
680 i, j, NUM_LB);
681 error = 14;
682 ns_init_card_error(card, error);
683 return error;
684 }
685 NS_PRV_BUFTYPE(lb) = BUF_LG;
686 skb_queue_tail(&card->lbpool.queue, lb);
687 skb_reserve(lb, NS_SMBUFSIZE);
688 push_rxbufs(card, lb);
689 /* Due to the implementation of push_rxbufs() this is 1, not 0 */
690 if (j == 1) {
691 card->rcbuf = lb;
692 card->rawcell = (struct ns_rcqe *) lb->data;
693 card->rawch = NS_PRV_DMA(lb);
694 }
695 }
696 /* Test for strange behaviour which leads to crashes */
697 if ((bcount =
698 ns_stat_lfbqc_get(readl(card->membase + STAT))) < card->lbnr.min) {
699 printk
700 ("nicstar%d: Strange... Just allocated %d large buffers and lfbqc = %d.\n",
701 i, j, bcount);
702 error = 14;
703 ns_init_card_error(card, error);
704 return error;
705 }
706
707 /* Allocate small buffers */
708 skb_queue_head_init(&card->sbpool.queue);
709 card->sbpool.count = 0; /* Not used */
710 for (j = 0; j < NUM_SB; j++) {
711 struct sk_buff *sb;
712 sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
713 if (sb == NULL) {
714 printk
715 ("nicstar%d: can't allocate %dth of %d small buffers.\n",
716 i, j, NUM_SB);
717 error = 15;
718 ns_init_card_error(card, error);
719 return error;
720 }
721 NS_PRV_BUFTYPE(sb) = BUF_SM;
722 skb_queue_tail(&card->sbpool.queue, sb);
723 skb_reserve(sb, NS_AAL0_HEADER);
724 push_rxbufs(card, sb);
725 }
726 /* Test for strange behaviour which leads to crashes */
727 if ((bcount =
728 ns_stat_sfbqc_get(readl(card->membase + STAT))) < card->sbnr.min) {
729 printk
730 ("nicstar%d: Strange... Just allocated %d small buffers and sfbqc = %d.\n",
731 i, j, bcount);
732 error = 15;
733 ns_init_card_error(card, error);
734 return error;
735 }
736
737 /* Allocate iovec buffers */
738 skb_queue_head_init(&card->iovpool.queue);
739 card->iovpool.count = 0;
740 for (j = 0; j < NUM_IOVB; j++) {
741 struct sk_buff *iovb;
742 iovb = alloc_skb(NS_IOVBUFSIZE, GFP_KERNEL);
743 if (iovb == NULL) {
744 printk
745 ("nicstar%d: can't allocate %dth of %d iovec buffers.\n",
746 i, j, NUM_IOVB);
747 error = 16;
748 ns_init_card_error(card, error);
749 return error;
750 }
751 NS_PRV_BUFTYPE(iovb) = BUF_NONE;
752 skb_queue_tail(&card->iovpool.queue, iovb);
753 card->iovpool.count++;
754 }
755
756 /* Configure NICStAR */
757 if (card->rct_size == 4096)
758 ns_cfg_rctsize = NS_CFG_RCTSIZE_4096_ENTRIES;
759 else /* (card->rct_size == 16384) */
760 ns_cfg_rctsize = NS_CFG_RCTSIZE_16384_ENTRIES;
761
762 card->efbie = 1;
763
764 card->intcnt = 0;
765 if (request_irq
766 (pcidev->irq, &ns_irq_handler, IRQF_SHARED, "nicstar", card) != 0) {
767 printk("nicstar%d: can't allocate IRQ %d.\n", i, pcidev->irq);
768 error = 9;
769 ns_init_card_error(card, error);
770 return error;
771 }
772
773 /* Register device */
774 card->atmdev = atm_dev_register("nicstar", &atm_ops, -1, NULL);
775 if (card->atmdev == NULL) {
776 printk("nicstar%d: can't register device.\n", i);
777 error = 17;
778 ns_init_card_error(card, error);
779 return error;
780 }
781
782 if (ns_parse_mac(mac[i], card->atmdev->esi)) {
783 nicstar_read_eprom(card->membase, NICSTAR_EPROM_MAC_ADDR_OFFSET,
784 card->atmdev->esi, 6);
785 if (memcmp(card->atmdev->esi, "\x00\x00\x00\x00\x00\x00", 6) ==
786 0) {
787 nicstar_read_eprom(card->membase,
788 NICSTAR_EPROM_MAC_ADDR_OFFSET_ALT,
789 card->atmdev->esi, 6);
790 }
791 }
792
793 printk("nicstar%d: MAC address %pM\n", i, card->atmdev->esi);
794
795 card->atmdev->dev_data = card;
796 card->atmdev->ci_range.vpi_bits = card->vpibits;
797 card->atmdev->ci_range.vci_bits = card->vcibits;
798 card->atmdev->link_rate = card->max_pcr;
799 card->atmdev->phy = NULL;
800
801 #ifdef CONFIG_ATM_NICSTAR_USE_SUNI
802 if (card->max_pcr == ATM_OC3_PCR)
803 suni_init(card->atmdev);
804 #endif /* CONFIG_ATM_NICSTAR_USE_SUNI */
805
806 #ifdef CONFIG_ATM_NICSTAR_USE_IDT77105
807 if (card->max_pcr == ATM_25_PCR)
808 idt77105_init(card->atmdev);
809 #endif /* CONFIG_ATM_NICSTAR_USE_IDT77105 */
810
811 if (card->atmdev->phy && card->atmdev->phy->start)
812 card->atmdev->phy->start(card->atmdev);
813
814 writel(NS_CFG_RXPATH | NS_CFG_SMBUFSIZE | NS_CFG_LGBUFSIZE | NS_CFG_EFBIE | NS_CFG_RSQSIZE | NS_CFG_VPIBITS | ns_cfg_rctsize | NS_CFG_RXINT_NODELAY | NS_CFG_RAWIE | /* Only enabled if RCQ_SUPPORT */
815 NS_CFG_RSQAFIE | NS_CFG_TXEN | NS_CFG_TXIE | NS_CFG_TSQFIE_OPT | /* Only enabled if ENABLE_TSQFIE */
816 NS_CFG_PHYIE, card->membase + CFG);
817
818 num_cards++;
819
820 return error;
821 }
822
823 static void __devinit ns_init_card_error(ns_dev * card, int error)
824 {
825 if (error >= 17) {
826 writel(0x00000000, card->membase + CFG);
827 }
828 if (error >= 16) {
829 struct sk_buff *iovb;
830 while ((iovb = skb_dequeue(&card->iovpool.queue)) != NULL)
831 dev_kfree_skb_any(iovb);
832 }
833 if (error >= 15) {
834 struct sk_buff *sb;
835 while ((sb = skb_dequeue(&card->sbpool.queue)) != NULL)
836 dev_kfree_skb_any(sb);
837 free_scq(card, card->scq0, NULL);
838 }
839 if (error >= 14) {
840 struct sk_buff *lb;
841 while ((lb = skb_dequeue(&card->lbpool.queue)) != NULL)
842 dev_kfree_skb_any(lb);
843 }
844 if (error >= 13) {
845 struct sk_buff *hb;
846 while ((hb = skb_dequeue(&card->hbpool.queue)) != NULL)
847 dev_kfree_skb_any(hb);
848 }
849 if (error >= 12) {
850 kfree(card->rsq.org);
851 }
852 if (error >= 11) {
853 kfree(card->tsq.org);
854 }
855 if (error >= 10) {
856 free_irq(card->pcidev->irq, card);
857 }
858 if (error >= 4) {
859 iounmap(card->membase);
860 }
861 if (error >= 3) {
862 pci_disable_device(card->pcidev);
863 kfree(card);
864 }
865 }
866
867 static scq_info *get_scq(ns_dev *card, int size, u32 scd)
868 {
869 scq_info *scq;
870 int i;
871
872 if (size != VBR_SCQSIZE && size != CBR_SCQSIZE)
873 return NULL;
874
875 scq = kmalloc(sizeof(scq_info), GFP_KERNEL);
876 if (!scq)
877 return NULL;
878 scq->org = pci_alloc_consistent(card->pcidev, 2 * size, &scq->dma);
879 if (!scq->org) {
880 kfree(scq);
881 return NULL;
882 }
883 scq->skb = kmalloc(sizeof(struct sk_buff *) *
884 (size / NS_SCQE_SIZE), GFP_KERNEL);
885 if (!scq->skb) {
886 kfree(scq->org);
887 kfree(scq);
888 return NULL;
889 }
890 scq->num_entries = size / NS_SCQE_SIZE;
891 scq->base = PTR_ALIGN(scq->org, size);
892 scq->next = scq->base;
893 scq->last = scq->base + (scq->num_entries - 1);
894 scq->tail = scq->last;
895 scq->scd = scd;
896 scq->num_entries = size / NS_SCQE_SIZE;
897 scq->tbd_count = 0;
898 init_waitqueue_head(&scq->scqfull_waitq);
899 scq->full = 0;
900 spin_lock_init(&scq->lock);
901
902 for (i = 0; i < scq->num_entries; i++)
903 scq->skb[i] = NULL;
904
905 return scq;
906 }
907
908 /* For variable rate SCQ vcc must be NULL */
909 static void free_scq(ns_dev *card, scq_info *scq, struct atm_vcc *vcc)
910 {
911 int i;
912
913 if (scq->num_entries == VBR_SCQ_NUM_ENTRIES)
914 for (i = 0; i < scq->num_entries; i++) {
915 if (scq->skb[i] != NULL) {
916 vcc = ATM_SKB(scq->skb[i])->vcc;
917 if (vcc->pop != NULL)
918 vcc->pop(vcc, scq->skb[i]);
919 else
920 dev_kfree_skb_any(scq->skb[i]);
921 }
922 } else { /* vcc must be != NULL */
923
924 if (vcc == NULL) {
925 printk
926 ("nicstar: free_scq() called with vcc == NULL for fixed rate scq.");
927 for (i = 0; i < scq->num_entries; i++)
928 dev_kfree_skb_any(scq->skb[i]);
929 } else
930 for (i = 0; i < scq->num_entries; i++) {
931 if (scq->skb[i] != NULL) {
932 if (vcc->pop != NULL)
933 vcc->pop(vcc, scq->skb[i]);
934 else
935 dev_kfree_skb_any(scq->skb[i]);
936 }
937 }
938 }
939 kfree(scq->skb);
940 pci_free_consistent(card->pcidev,
941 2 * (scq->num_entries == VBR_SCQ_NUM_ENTRIES ?
942 VBR_SCQSIZE : CBR_SCQSIZE),
943 scq->org, scq->dma);
944 kfree(scq);
945 }
946
947 /* The handles passed must be pointers to the sk_buff containing the small
948 or large buffer(s) cast to u32. */
949 static void push_rxbufs(ns_dev * card, struct sk_buff *skb)
950 {
951 struct sk_buff *handle1, *handle2;
952 u32 id1 = 0, id2 = 0;
953 u32 addr1, addr2;
954 u32 stat;
955 unsigned long flags;
956 int err;
957
958 /* *BARF* */
959 handle2 = NULL;
960 addr2 = 0;
961 handle1 = skb;
962 addr1 = pci_map_single(card->pcidev,
963 skb->data,
964 (NS_PRV_BUFTYPE(skb) == BUF_SM
965 ? NS_SMSKBSIZE : NS_LGSKBSIZE),
966 PCI_DMA_TODEVICE);
967 NS_PRV_DMA(skb) = addr1; /* save so we can unmap later */
968
969 #ifdef GENERAL_DEBUG
970 if (!addr1)
971 printk("nicstar%d: push_rxbufs called with addr1 = 0.\n",
972 card->index);
973 #endif /* GENERAL_DEBUG */
974
975 stat = readl(card->membase + STAT);
976 card->sbfqc = ns_stat_sfbqc_get(stat);
977 card->lbfqc = ns_stat_lfbqc_get(stat);
978 if (NS_PRV_BUFTYPE(skb) == BUF_SM) {
979 if (!addr2) {
980 if (card->sm_addr) {
981 addr2 = card->sm_addr;
982 handle2 = card->sm_handle;
983 card->sm_addr = 0x00000000;
984 card->sm_handle = 0x00000000;
985 } else { /* (!sm_addr) */
986
987 card->sm_addr = addr1;
988 card->sm_handle = handle1;
989 }
990 }
991 } else { /* buf_type == BUF_LG */
992
993 if (!addr2) {
994 if (card->lg_addr) {
995 addr2 = card->lg_addr;
996 handle2 = card->lg_handle;
997 card->lg_addr = 0x00000000;
998 card->lg_handle = 0x00000000;
999 } else { /* (!lg_addr) */
1000
1001 card->lg_addr = addr1;
1002 card->lg_handle = handle1;
1003 }
1004 }
1005 }
1006
1007 if (addr2) {
1008 if (NS_PRV_BUFTYPE(skb) == BUF_SM) {
1009 if (card->sbfqc >= card->sbnr.max) {
1010 skb_unlink(handle1, &card->sbpool.queue);
1011 dev_kfree_skb_any(handle1);
1012 skb_unlink(handle2, &card->sbpool.queue);
1013 dev_kfree_skb_any(handle2);
1014 return;
1015 } else
1016 card->sbfqc += 2;
1017 } else { /* (buf_type == BUF_LG) */
1018
1019 if (card->lbfqc >= card->lbnr.max) {
1020 skb_unlink(handle1, &card->lbpool.queue);
1021 dev_kfree_skb_any(handle1);
1022 skb_unlink(handle2, &card->lbpool.queue);
1023 dev_kfree_skb_any(handle2);
1024 return;
1025 } else
1026 card->lbfqc += 2;
1027 }
1028
1029 do {
1030 if (!idr_pre_get(&card->idr, GFP_ATOMIC)) {
1031 printk(KERN_ERR
1032 "nicstar%d: no free memory for idr\n",
1033 card->index);
1034 goto out;
1035 }
1036
1037 if (!id1)
1038 err = idr_get_new_above(&card->idr, handle1, 0, &id1);
1039
1040 if (!id2 && err == 0)
1041 err = idr_get_new_above(&card->idr, handle2, 0, &id2);
1042
1043 } while (err == -EAGAIN);
1044
1045 if (err)
1046 goto out;
1047
1048 spin_lock_irqsave(&card->res_lock, flags);
1049 while (CMD_BUSY(card)) ;
1050 writel(addr2, card->membase + DR3);
1051 writel(id2, card->membase + DR2);
1052 writel(addr1, card->membase + DR1);
1053 writel(id1, card->membase + DR0);
1054 writel(NS_CMD_WRITE_FREEBUFQ | NS_PRV_BUFTYPE(skb),
1055 card->membase + CMD);
1056 spin_unlock_irqrestore(&card->res_lock, flags);
1057
1058 XPRINTK("nicstar%d: Pushing %s buffers at 0x%x and 0x%x.\n",
1059 card->index,
1060 (NS_PRV_BUFTYPE(skb) == BUF_SM ? "small" : "large"),
1061 addr1, addr2);
1062 }
1063
1064 if (!card->efbie && card->sbfqc >= card->sbnr.min &&
1065 card->lbfqc >= card->lbnr.min) {
1066 card->efbie = 1;
1067 writel((readl(card->membase + CFG) | NS_CFG_EFBIE),
1068 card->membase + CFG);
1069 }
1070
1071 out:
1072 return;
1073 }
1074
1075 static irqreturn_t ns_irq_handler(int irq, void *dev_id)
1076 {
1077 u32 stat_r;
1078 ns_dev *card;
1079 struct atm_dev *dev;
1080 unsigned long flags;
1081
1082 card = (ns_dev *) dev_id;
1083 dev = card->atmdev;
1084 card->intcnt++;
1085
1086 PRINTK("nicstar%d: NICStAR generated an interrupt\n", card->index);
1087
1088 spin_lock_irqsave(&card->int_lock, flags);
1089
1090 stat_r = readl(card->membase + STAT);
1091
1092 /* Transmit Status Indicator has been written to T. S. Queue */
1093 if (stat_r & NS_STAT_TSIF) {
1094 TXPRINTK("nicstar%d: TSI interrupt\n", card->index);
1095 process_tsq(card);
1096 writel(NS_STAT_TSIF, card->membase + STAT);
1097 }
1098
1099 /* Incomplete CS-PDU has been transmitted */
1100 if (stat_r & NS_STAT_TXICP) {
1101 writel(NS_STAT_TXICP, card->membase + STAT);
1102 TXPRINTK("nicstar%d: Incomplete CS-PDU transmitted.\n",
1103 card->index);
1104 }
1105
1106 /* Transmit Status Queue 7/8 full */
1107 if (stat_r & NS_STAT_TSQF) {
1108 writel(NS_STAT_TSQF, card->membase + STAT);
1109 PRINTK("nicstar%d: TSQ full.\n", card->index);
1110 process_tsq(card);
1111 }
1112
1113 /* Timer overflow */
1114 if (stat_r & NS_STAT_TMROF) {
1115 writel(NS_STAT_TMROF, card->membase + STAT);
1116 PRINTK("nicstar%d: Timer overflow.\n", card->index);
1117 }
1118
1119 /* PHY device interrupt signal active */
1120 if (stat_r & NS_STAT_PHYI) {
1121 writel(NS_STAT_PHYI, card->membase + STAT);
1122 PRINTK("nicstar%d: PHY interrupt.\n", card->index);
1123 if (dev->phy && dev->phy->interrupt) {
1124 dev->phy->interrupt(dev);
1125 }
1126 }
1127
1128 /* Small Buffer Queue is full */
1129 if (stat_r & NS_STAT_SFBQF) {
1130 writel(NS_STAT_SFBQF, card->membase + STAT);
1131 printk("nicstar%d: Small free buffer queue is full.\n",
1132 card->index);
1133 }
1134
1135 /* Large Buffer Queue is full */
1136 if (stat_r & NS_STAT_LFBQF) {
1137 writel(NS_STAT_LFBQF, card->membase + STAT);
1138 printk("nicstar%d: Large free buffer queue is full.\n",
1139 card->index);
1140 }
1141
1142 /* Receive Status Queue is full */
1143 if (stat_r & NS_STAT_RSQF) {
1144 writel(NS_STAT_RSQF, card->membase + STAT);
1145 printk("nicstar%d: RSQ full.\n", card->index);
1146 process_rsq(card);
1147 }
1148
1149 /* Complete CS-PDU received */
1150 if (stat_r & NS_STAT_EOPDU) {
1151 RXPRINTK("nicstar%d: End of CS-PDU received.\n", card->index);
1152 process_rsq(card);
1153 writel(NS_STAT_EOPDU, card->membase + STAT);
1154 }
1155
1156 /* Raw cell received */
1157 if (stat_r & NS_STAT_RAWCF) {
1158 writel(NS_STAT_RAWCF, card->membase + STAT);
1159 #ifndef RCQ_SUPPORT
1160 printk("nicstar%d: Raw cell received and no support yet...\n",
1161 card->index);
1162 #endif /* RCQ_SUPPORT */
1163 /* NOTE: the following procedure may keep a raw cell pending until the
1164 next interrupt. As this preliminary support is only meant to
1165 avoid buffer leakage, this is not an issue. */
1166 while (readl(card->membase + RAWCT) != card->rawch) {
1167
1168 if (ns_rcqe_islast(card->rawcell)) {
1169 struct sk_buff *oldbuf;
1170
1171 oldbuf = card->rcbuf;
1172 card->rcbuf = idr_find(&card->idr,
1173 ns_rcqe_nextbufhandle(card->rawcell));
1174 card->rawch = NS_PRV_DMA(card->rcbuf);
1175 card->rawcell = (struct ns_rcqe *)
1176 card->rcbuf->data;
1177 recycle_rx_buf(card, oldbuf);
1178 } else {
1179 card->rawch += NS_RCQE_SIZE;
1180 card->rawcell++;
1181 }
1182 }
1183 }
1184
1185 /* Small buffer queue is empty */
1186 if (stat_r & NS_STAT_SFBQE) {
1187 int i;
1188 struct sk_buff *sb;
1189
1190 writel(NS_STAT_SFBQE, card->membase + STAT);
1191 printk("nicstar%d: Small free buffer queue empty.\n",
1192 card->index);
1193 for (i = 0; i < card->sbnr.min; i++) {
1194 sb = dev_alloc_skb(NS_SMSKBSIZE);
1195 if (sb == NULL) {
1196 writel(readl(card->membase + CFG) &
1197 ~NS_CFG_EFBIE, card->membase + CFG);
1198 card->efbie = 0;
1199 break;
1200 }
1201 NS_PRV_BUFTYPE(sb) = BUF_SM;
1202 skb_queue_tail(&card->sbpool.queue, sb);
1203 skb_reserve(sb, NS_AAL0_HEADER);
1204 push_rxbufs(card, sb);
1205 }
1206 card->sbfqc = i;
1207 process_rsq(card);
1208 }
1209
1210 /* Large buffer queue empty */
1211 if (stat_r & NS_STAT_LFBQE) {
1212 int i;
1213 struct sk_buff *lb;
1214
1215 writel(NS_STAT_LFBQE, card->membase + STAT);
1216 printk("nicstar%d: Large free buffer queue empty.\n",
1217 card->index);
1218 for (i = 0; i < card->lbnr.min; i++) {
1219 lb = dev_alloc_skb(NS_LGSKBSIZE);
1220 if (lb == NULL) {
1221 writel(readl(card->membase + CFG) &
1222 ~NS_CFG_EFBIE, card->membase + CFG);
1223 card->efbie = 0;
1224 break;
1225 }
1226 NS_PRV_BUFTYPE(lb) = BUF_LG;
1227 skb_queue_tail(&card->lbpool.queue, lb);
1228 skb_reserve(lb, NS_SMBUFSIZE);
1229 push_rxbufs(card, lb);
1230 }
1231 card->lbfqc = i;
1232 process_rsq(card);
1233 }
1234
1235 /* Receive Status Queue is 7/8 full */
1236 if (stat_r & NS_STAT_RSQAF) {
1237 writel(NS_STAT_RSQAF, card->membase + STAT);
1238 RXPRINTK("nicstar%d: RSQ almost full.\n", card->index);
1239 process_rsq(card);
1240 }
1241
1242 spin_unlock_irqrestore(&card->int_lock, flags);
1243 PRINTK("nicstar%d: end of interrupt service\n", card->index);
1244 return IRQ_HANDLED;
1245 }
1246
1247 static int ns_open(struct atm_vcc *vcc)
1248 {
1249 ns_dev *card;
1250 vc_map *vc;
1251 unsigned long tmpl, modl;
1252 int tcr, tcra; /* target cell rate, and absolute value */
1253 int n = 0; /* Number of entries in the TST. Initialized to remove
1254 the compiler warning. */
1255 u32 u32d[4];
1256 int frscdi = 0; /* Index of the SCD. Initialized to remove the compiler
1257 warning. How I wish compilers were clever enough to
1258 tell which variables can truly be used
1259 uninitialized... */
1260 int inuse; /* tx or rx vc already in use by another vcc */
1261 short vpi = vcc->vpi;
1262 int vci = vcc->vci;
1263
1264 card = (ns_dev *) vcc->dev->dev_data;
1265 PRINTK("nicstar%d: opening vpi.vci %d.%d \n", card->index, (int)vpi,
1266 vci);
1267 if (vcc->qos.aal != ATM_AAL5 && vcc->qos.aal != ATM_AAL0) {
1268 PRINTK("nicstar%d: unsupported AAL.\n", card->index);
1269 return -EINVAL;
1270 }
1271
1272 vc = &(card->vcmap[vpi << card->vcibits | vci]);
1273 vcc->dev_data = vc;
1274
1275 inuse = 0;
1276 if (vcc->qos.txtp.traffic_class != ATM_NONE && vc->tx)
1277 inuse = 1;
1278 if (vcc->qos.rxtp.traffic_class != ATM_NONE && vc->rx)
1279 inuse += 2;
1280 if (inuse) {
1281 printk("nicstar%d: %s vci already in use.\n", card->index,
1282 inuse == 1 ? "tx" : inuse == 2 ? "rx" : "tx and rx");
1283 return -EINVAL;
1284 }
1285
1286 set_bit(ATM_VF_ADDR, &vcc->flags);
1287
1288 /* NOTE: You are not allowed to modify an open connection's QOS. To change
1289 that, remove the ATM_VF_PARTIAL flag checking. There may be other changes
1290 needed to do that. */
1291 if (!test_bit(ATM_VF_PARTIAL, &vcc->flags)) {
1292 scq_info *scq;
1293
1294 set_bit(ATM_VF_PARTIAL, &vcc->flags);
1295 if (vcc->qos.txtp.traffic_class == ATM_CBR) {
1296 /* Check requested cell rate and availability of SCD */
1297 if (vcc->qos.txtp.max_pcr == 0 && vcc->qos.txtp.pcr == 0
1298 && vcc->qos.txtp.min_pcr == 0) {
1299 PRINTK
1300 ("nicstar%d: trying to open a CBR vc with cell rate = 0 \n",
1301 card->index);
1302 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1303 clear_bit(ATM_VF_ADDR, &vcc->flags);
1304 return -EINVAL;
1305 }
1306
1307 tcr = atm_pcr_goal(&(vcc->qos.txtp));
1308 tcra = tcr >= 0 ? tcr : -tcr;
1309
1310 PRINTK("nicstar%d: target cell rate = %d.\n",
1311 card->index, vcc->qos.txtp.max_pcr);
1312
1313 tmpl =
1314 (unsigned long)tcra *(unsigned long)
1315 NS_TST_NUM_ENTRIES;
1316 modl = tmpl % card->max_pcr;
1317
1318 n = (int)(tmpl / card->max_pcr);
1319 if (tcr > 0) {
1320 if (modl > 0)
1321 n++;
1322 } else if (tcr == 0) {
1323 if ((n =
1324 (card->tst_free_entries -
1325 NS_TST_RESERVED)) <= 0) {
1326 PRINTK
1327 ("nicstar%d: no CBR bandwidth free.\n",
1328 card->index);
1329 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1330 clear_bit(ATM_VF_ADDR, &vcc->flags);
1331 return -EINVAL;
1332 }
1333 }
1334
1335 if (n == 0) {
1336 printk
1337 ("nicstar%d: selected bandwidth < granularity.\n",
1338 card->index);
1339 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1340 clear_bit(ATM_VF_ADDR, &vcc->flags);
1341 return -EINVAL;
1342 }
1343
1344 if (n > (card->tst_free_entries - NS_TST_RESERVED)) {
1345 PRINTK
1346 ("nicstar%d: not enough free CBR bandwidth.\n",
1347 card->index);
1348 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1349 clear_bit(ATM_VF_ADDR, &vcc->flags);
1350 return -EINVAL;
1351 } else
1352 card->tst_free_entries -= n;
1353
1354 XPRINTK("nicstar%d: writing %d tst entries.\n",
1355 card->index, n);
1356 for (frscdi = 0; frscdi < NS_FRSCD_NUM; frscdi++) {
1357 if (card->scd2vc[frscdi] == NULL) {
1358 card->scd2vc[frscdi] = vc;
1359 break;
1360 }
1361 }
1362 if (frscdi == NS_FRSCD_NUM) {
1363 PRINTK
1364 ("nicstar%d: no SCD available for CBR channel.\n",
1365 card->index);
1366 card->tst_free_entries += n;
1367 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1368 clear_bit(ATM_VF_ADDR, &vcc->flags);
1369 return -EBUSY;
1370 }
1371
1372 vc->cbr_scd = NS_FRSCD + frscdi * NS_FRSCD_SIZE;
1373
1374 scq = get_scq(card, CBR_SCQSIZE, vc->cbr_scd);
1375 if (scq == NULL) {
1376 PRINTK("nicstar%d: can't get fixed rate SCQ.\n",
1377 card->index);
1378 card->scd2vc[frscdi] = NULL;
1379 card->tst_free_entries += n;
1380 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1381 clear_bit(ATM_VF_ADDR, &vcc->flags);
1382 return -ENOMEM;
1383 }
1384 vc->scq = scq;
1385 u32d[0] = scq_virt_to_bus(scq, scq->base);
1386 u32d[1] = (u32) 0x00000000;
1387 u32d[2] = (u32) 0xffffffff;
1388 u32d[3] = (u32) 0x00000000;
1389 ns_write_sram(card, vc->cbr_scd, u32d, 4);
1390
1391 fill_tst(card, n, vc);
1392 } else if (vcc->qos.txtp.traffic_class == ATM_UBR) {
1393 vc->cbr_scd = 0x00000000;
1394 vc->scq = card->scq0;
1395 }
1396
1397 if (vcc->qos.txtp.traffic_class != ATM_NONE) {
1398 vc->tx = 1;
1399 vc->tx_vcc = vcc;
1400 vc->tbd_count = 0;
1401 }
1402 if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
1403 u32 status;
1404
1405 vc->rx = 1;
1406 vc->rx_vcc = vcc;
1407 vc->rx_iov = NULL;
1408
1409 /* Open the connection in hardware */
1410 if (vcc->qos.aal == ATM_AAL5)
1411 status = NS_RCTE_AAL5 | NS_RCTE_CONNECTOPEN;
1412 else /* vcc->qos.aal == ATM_AAL0 */
1413 status = NS_RCTE_AAL0 | NS_RCTE_CONNECTOPEN;
1414 #ifdef RCQ_SUPPORT
1415 status |= NS_RCTE_RAWCELLINTEN;
1416 #endif /* RCQ_SUPPORT */
1417 ns_write_sram(card,
1418 NS_RCT +
1419 (vpi << card->vcibits | vci) *
1420 NS_RCT_ENTRY_SIZE, &status, 1);
1421 }
1422
1423 }
1424
1425 set_bit(ATM_VF_READY, &vcc->flags);
1426 return 0;
1427 }
1428
1429 static void ns_close(struct atm_vcc *vcc)
1430 {
1431 vc_map *vc;
1432 ns_dev *card;
1433 u32 data;
1434 int i;
1435
1436 vc = vcc->dev_data;
1437 card = vcc->dev->dev_data;
1438 PRINTK("nicstar%d: closing vpi.vci %d.%d \n", card->index,
1439 (int)vcc->vpi, vcc->vci);
1440
1441 clear_bit(ATM_VF_READY, &vcc->flags);
1442
1443 if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
1444 u32 addr;
1445 unsigned long flags;
1446
1447 addr =
1448 NS_RCT +
1449 (vcc->vpi << card->vcibits | vcc->vci) * NS_RCT_ENTRY_SIZE;
1450 spin_lock_irqsave(&card->res_lock, flags);
1451 while (CMD_BUSY(card)) ;
1452 writel(NS_CMD_CLOSE_CONNECTION | addr << 2,
1453 card->membase + CMD);
1454 spin_unlock_irqrestore(&card->res_lock, flags);
1455
1456 vc->rx = 0;
1457 if (vc->rx_iov != NULL) {
1458 struct sk_buff *iovb;
1459 u32 stat;
1460
1461 stat = readl(card->membase + STAT);
1462 card->sbfqc = ns_stat_sfbqc_get(stat);
1463 card->lbfqc = ns_stat_lfbqc_get(stat);
1464
1465 PRINTK
1466 ("nicstar%d: closing a VC with pending rx buffers.\n",
1467 card->index);
1468 iovb = vc->rx_iov;
1469 recycle_iovec_rx_bufs(card, (struct iovec *)iovb->data,
1470 NS_PRV_IOVCNT(iovb));
1471 NS_PRV_IOVCNT(iovb) = 0;
1472 spin_lock_irqsave(&card->int_lock, flags);
1473 recycle_iov_buf(card, iovb);
1474 spin_unlock_irqrestore(&card->int_lock, flags);
1475 vc->rx_iov = NULL;
1476 }
1477 }
1478
1479 if (vcc->qos.txtp.traffic_class != ATM_NONE) {
1480 vc->tx = 0;
1481 }
1482
1483 if (vcc->qos.txtp.traffic_class == ATM_CBR) {
1484 unsigned long flags;
1485 ns_scqe *scqep;
1486 scq_info *scq;
1487
1488 scq = vc->scq;
1489
1490 for (;;) {
1491 spin_lock_irqsave(&scq->lock, flags);
1492 scqep = scq->next;
1493 if (scqep == scq->base)
1494 scqep = scq->last;
1495 else
1496 scqep--;
1497 if (scqep == scq->tail) {
1498 spin_unlock_irqrestore(&scq->lock, flags);
1499 break;
1500 }
1501 /* If the last entry is not a TSR, place one in the SCQ in order to
1502 be able to completely drain it and then close. */
1503 if (!ns_scqe_is_tsr(scqep) && scq->tail != scq->next) {
1504 ns_scqe tsr;
1505 u32 scdi, scqi;
1506 u32 data;
1507 int index;
1508
1509 tsr.word_1 = ns_tsr_mkword_1(NS_TSR_INTENABLE);
1510 scdi = (vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE;
1511 scqi = scq->next - scq->base;
1512 tsr.word_2 = ns_tsr_mkword_2(scdi, scqi);
1513 tsr.word_3 = 0x00000000;
1514 tsr.word_4 = 0x00000000;
1515 *scq->next = tsr;
1516 index = (int)scqi;
1517 scq->skb[index] = NULL;
1518 if (scq->next == scq->last)
1519 scq->next = scq->base;
1520 else
1521 scq->next++;
1522 data = scq_virt_to_bus(scq, scq->next);
1523 ns_write_sram(card, scq->scd, &data, 1);
1524 }
1525 spin_unlock_irqrestore(&scq->lock, flags);
1526 schedule();
1527 }
1528
1529 /* Free all TST entries */
1530 data = NS_TST_OPCODE_VARIABLE;
1531 for (i = 0; i < NS_TST_NUM_ENTRIES; i++) {
1532 if (card->tste2vc[i] == vc) {
1533 ns_write_sram(card, card->tst_addr + i, &data,
1534 1);
1535 card->tste2vc[i] = NULL;
1536 card->tst_free_entries++;
1537 }
1538 }
1539
1540 card->scd2vc[(vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE] = NULL;
1541 free_scq(card, vc->scq, vcc);
1542 }
1543
1544 /* remove all references to vcc before deleting it */
1545 if (vcc->qos.txtp.traffic_class != ATM_NONE) {
1546 unsigned long flags;
1547 scq_info *scq = card->scq0;
1548
1549 spin_lock_irqsave(&scq->lock, flags);
1550
1551 for (i = 0; i < scq->num_entries; i++) {
1552 if (scq->skb[i] && ATM_SKB(scq->skb[i])->vcc == vcc) {
1553 ATM_SKB(scq->skb[i])->vcc = NULL;
1554 atm_return(vcc, scq->skb[i]->truesize);
1555 PRINTK
1556 ("nicstar: deleted pending vcc mapping\n");
1557 }
1558 }
1559
1560 spin_unlock_irqrestore(&scq->lock, flags);
1561 }
1562
1563 vcc->dev_data = NULL;
1564 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1565 clear_bit(ATM_VF_ADDR, &vcc->flags);
1566
1567 #ifdef RX_DEBUG
1568 {
1569 u32 stat, cfg;
1570 stat = readl(card->membase + STAT);
1571 cfg = readl(card->membase + CFG);
1572 printk("STAT = 0x%08X CFG = 0x%08X \n", stat, cfg);
1573 printk
1574 ("TSQ: base = 0x%p next = 0x%p last = 0x%p TSQT = 0x%08X \n",
1575 card->tsq.base, card->tsq.next,
1576 card->tsq.last, readl(card->membase + TSQT));
1577 printk
1578 ("RSQ: base = 0x%p next = 0x%p last = 0x%p RSQT = 0x%08X \n",
1579 card->rsq.base, card->rsq.next,
1580 card->rsq.last, readl(card->membase + RSQT));
1581 printk("Empty free buffer queue interrupt %s \n",
1582 card->efbie ? "enabled" : "disabled");
1583 printk("SBCNT = %d count = %d LBCNT = %d count = %d \n",
1584 ns_stat_sfbqc_get(stat), card->sbpool.count,
1585 ns_stat_lfbqc_get(stat), card->lbpool.count);
1586 printk("hbpool.count = %d iovpool.count = %d \n",
1587 card->hbpool.count, card->iovpool.count);
1588 }
1589 #endif /* RX_DEBUG */
1590 }
1591
1592 static void fill_tst(ns_dev * card, int n, vc_map * vc)
1593 {
1594 u32 new_tst;
1595 unsigned long cl;
1596 int e, r;
1597 u32 data;
1598
1599 /* It would be very complicated to keep the two TSTs synchronized while
1600 assuring that writes are only made to the inactive TST. So, for now I
1601 will use only one TST. If problems occur, I will change this again */
1602
1603 new_tst = card->tst_addr;
1604
1605 /* Fill procedure */
1606
1607 for (e = 0; e < NS_TST_NUM_ENTRIES; e++) {
1608 if (card->tste2vc[e] == NULL)
1609 break;
1610 }
1611 if (e == NS_TST_NUM_ENTRIES) {
1612 printk("nicstar%d: No free TST entries found. \n", card->index);
1613 return;
1614 }
1615
1616 r = n;
1617 cl = NS_TST_NUM_ENTRIES;
1618 data = ns_tste_make(NS_TST_OPCODE_FIXED, vc->cbr_scd);
1619
1620 while (r > 0) {
1621 if (cl >= NS_TST_NUM_ENTRIES && card->tste2vc[e] == NULL) {
1622 card->tste2vc[e] = vc;
1623 ns_write_sram(card, new_tst + e, &data, 1);
1624 cl -= NS_TST_NUM_ENTRIES;
1625 r--;
1626 }
1627
1628 if (++e == NS_TST_NUM_ENTRIES) {
1629 e = 0;
1630 }
1631 cl += n;
1632 }
1633
1634 /* End of fill procedure */
1635
1636 data = ns_tste_make(NS_TST_OPCODE_END, new_tst);
1637 ns_write_sram(card, new_tst + NS_TST_NUM_ENTRIES, &data, 1);
1638 ns_write_sram(card, card->tst_addr + NS_TST_NUM_ENTRIES, &data, 1);
1639 card->tst_addr = new_tst;
1640 }
1641
1642 static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb)
1643 {
1644 ns_dev *card;
1645 vc_map *vc;
1646 scq_info *scq;
1647 unsigned long buflen;
1648 ns_scqe scqe;
1649 u32 flags; /* TBD flags, not CPU flags */
1650
1651 card = vcc->dev->dev_data;
1652 TXPRINTK("nicstar%d: ns_send() called.\n", card->index);
1653 if ((vc = (vc_map *) vcc->dev_data) == NULL) {
1654 printk("nicstar%d: vcc->dev_data == NULL on ns_send().\n",
1655 card->index);
1656 atomic_inc(&vcc->stats->tx_err);
1657 dev_kfree_skb_any(skb);
1658 return -EINVAL;
1659 }
1660
1661 if (!vc->tx) {
1662 printk("nicstar%d: Trying to transmit on a non-tx VC.\n",
1663 card->index);
1664 atomic_inc(&vcc->stats->tx_err);
1665 dev_kfree_skb_any(skb);
1666 return -EINVAL;
1667 }
1668
1669 if (vcc->qos.aal != ATM_AAL5 && vcc->qos.aal != ATM_AAL0) {
1670 printk("nicstar%d: Only AAL0 and AAL5 are supported.\n",
1671 card->index);
1672 atomic_inc(&vcc->stats->tx_err);
1673 dev_kfree_skb_any(skb);
1674 return -EINVAL;
1675 }
1676
1677 if (skb_shinfo(skb)->nr_frags != 0) {
1678 printk("nicstar%d: No scatter-gather yet.\n", card->index);
1679 atomic_inc(&vcc->stats->tx_err);
1680 dev_kfree_skb_any(skb);
1681 return -EINVAL;
1682 }
1683
1684 ATM_SKB(skb)->vcc = vcc;
1685
1686 NS_PRV_DMA(skb) = pci_map_single(card->pcidev, skb->data,
1687 skb->len, PCI_DMA_TODEVICE);
1688
1689 if (vcc->qos.aal == ATM_AAL5) {
1690 buflen = (skb->len + 47 + 8) / 48 * 48; /* Multiple of 48 */
1691 flags = NS_TBD_AAL5;
1692 scqe.word_2 = cpu_to_le32(NS_PRV_DMA(skb));
1693 scqe.word_3 = cpu_to_le32(skb->len);
1694 scqe.word_4 =
1695 ns_tbd_mkword_4(0, (u32) vcc->vpi, (u32) vcc->vci, 0,
1696 ATM_SKB(skb)->
1697 atm_options & ATM_ATMOPT_CLP ? 1 : 0);
1698 flags |= NS_TBD_EOPDU;
1699 } else { /* (vcc->qos.aal == ATM_AAL0) */
1700
1701 buflen = ATM_CELL_PAYLOAD; /* i.e., 48 bytes */
1702 flags = NS_TBD_AAL0;
1703 scqe.word_2 = cpu_to_le32(NS_PRV_DMA(skb) + NS_AAL0_HEADER);
1704 scqe.word_3 = cpu_to_le32(0x00000000);
1705 if (*skb->data & 0x02) /* Payload type 1 - end of pdu */
1706 flags |= NS_TBD_EOPDU;
1707 scqe.word_4 =
1708 cpu_to_le32(*((u32 *) skb->data) & ~NS_TBD_VC_MASK);
1709 /* Force the VPI/VCI to be the same as in VCC struct */
1710 scqe.word_4 |=
1711 cpu_to_le32((((u32) vcc->
1712 vpi) << NS_TBD_VPI_SHIFT | ((u32) vcc->
1713 vci) <<
1714 NS_TBD_VCI_SHIFT) & NS_TBD_VC_MASK);
1715 }
1716
1717 if (vcc->qos.txtp.traffic_class == ATM_CBR) {
1718 scqe.word_1 = ns_tbd_mkword_1_novbr(flags, (u32) buflen);
1719 scq = ((vc_map *) vcc->dev_data)->scq;
1720 } else {
1721 scqe.word_1 =
1722 ns_tbd_mkword_1(flags, (u32) 1, (u32) 1, (u32) buflen);
1723 scq = card->scq0;
1724 }
1725
1726 if (push_scqe(card, vc, scq, &scqe, skb) != 0) {
1727 atomic_inc(&vcc->stats->tx_err);
1728 dev_kfree_skb_any(skb);
1729 return -EIO;
1730 }
1731 atomic_inc(&vcc->stats->tx);
1732
1733 return 0;
1734 }
1735
1736 static int push_scqe(ns_dev * card, vc_map * vc, scq_info * scq, ns_scqe * tbd,
1737 struct sk_buff *skb)
1738 {
1739 unsigned long flags;
1740 ns_scqe tsr;
1741 u32 scdi, scqi;
1742 int scq_is_vbr;
1743 u32 data;
1744 int index;
1745
1746 spin_lock_irqsave(&scq->lock, flags);
1747 while (scq->tail == scq->next) {
1748 if (in_interrupt()) {
1749 spin_unlock_irqrestore(&scq->lock, flags);
1750 printk("nicstar%d: Error pushing TBD.\n", card->index);
1751 return 1;
1752 }
1753
1754 scq->full = 1;
1755 spin_unlock_irqrestore(&scq->lock, flags);
1756 interruptible_sleep_on_timeout(&scq->scqfull_waitq,
1757 SCQFULL_TIMEOUT);
1758 spin_lock_irqsave(&scq->lock, flags);
1759
1760 if (scq->full) {
1761 spin_unlock_irqrestore(&scq->lock, flags);
1762 printk("nicstar%d: Timeout pushing TBD.\n",
1763 card->index);
1764 return 1;
1765 }
1766 }
1767 *scq->next = *tbd;
1768 index = (int)(scq->next - scq->base);
1769 scq->skb[index] = skb;
1770 XPRINTK("nicstar%d: sending skb at 0x%p (pos %d).\n",
1771 card->index, skb, index);
1772 XPRINTK("nicstar%d: TBD written:\n0x%x\n0x%x\n0x%x\n0x%x\n at 0x%p.\n",
1773 card->index, le32_to_cpu(tbd->word_1), le32_to_cpu(tbd->word_2),
1774 le32_to_cpu(tbd->word_3), le32_to_cpu(tbd->word_4),
1775 scq->next);
1776 if (scq->next == scq->last)
1777 scq->next = scq->base;
1778 else
1779 scq->next++;
1780
1781 vc->tbd_count++;
1782 if (scq->num_entries == VBR_SCQ_NUM_ENTRIES) {
1783 scq->tbd_count++;
1784 scq_is_vbr = 1;
1785 } else
1786 scq_is_vbr = 0;
1787
1788 if (vc->tbd_count >= MAX_TBD_PER_VC
1789 || scq->tbd_count >= MAX_TBD_PER_SCQ) {
1790 int has_run = 0;
1791
1792 while (scq->tail == scq->next) {
1793 if (in_interrupt()) {
1794 data = scq_virt_to_bus(scq, scq->next);
1795 ns_write_sram(card, scq->scd, &data, 1);
1796 spin_unlock_irqrestore(&scq->lock, flags);
1797 printk("nicstar%d: Error pushing TSR.\n",
1798 card->index);
1799 return 0;
1800 }
1801
1802 scq->full = 1;
1803 if (has_run++)
1804 break;
1805 spin_unlock_irqrestore(&scq->lock, flags);
1806 interruptible_sleep_on_timeout(&scq->scqfull_waitq,
1807 SCQFULL_TIMEOUT);
1808 spin_lock_irqsave(&scq->lock, flags);
1809 }
1810
1811 if (!scq->full) {
1812 tsr.word_1 = ns_tsr_mkword_1(NS_TSR_INTENABLE);
1813 if (scq_is_vbr)
1814 scdi = NS_TSR_SCDISVBR;
1815 else
1816 scdi = (vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE;
1817 scqi = scq->next - scq->base;
1818 tsr.word_2 = ns_tsr_mkword_2(scdi, scqi);
1819 tsr.word_3 = 0x00000000;
1820 tsr.word_4 = 0x00000000;
1821
1822 *scq->next = tsr;
1823 index = (int)scqi;
1824 scq->skb[index] = NULL;
1825 XPRINTK
1826 ("nicstar%d: TSR written:\n0x%x\n0x%x\n0x%x\n0x%x\n at 0x%p.\n",
1827 card->index, le32_to_cpu(tsr.word_1),
1828 le32_to_cpu(tsr.word_2), le32_to_cpu(tsr.word_3),
1829 le32_to_cpu(tsr.word_4), scq->next);
1830 if (scq->next == scq->last)
1831 scq->next = scq->base;
1832 else
1833 scq->next++;
1834 vc->tbd_count = 0;
1835 scq->tbd_count = 0;
1836 } else
1837 PRINTK("nicstar%d: Timeout pushing TSR.\n",
1838 card->index);
1839 }
1840 data = scq_virt_to_bus(scq, scq->next);
1841 ns_write_sram(card, scq->scd, &data, 1);
1842
1843 spin_unlock_irqrestore(&scq->lock, flags);
1844
1845 return 0;
1846 }
1847
1848 static void process_tsq(ns_dev * card)
1849 {
1850 u32 scdi;
1851 scq_info *scq;
1852 ns_tsi *previous = NULL, *one_ahead, *two_ahead;
1853 int serviced_entries; /* flag indicating at least on entry was serviced */
1854
1855 serviced_entries = 0;
1856
1857 if (card->tsq.next == card->tsq.last)
1858 one_ahead = card->tsq.base;
1859 else
1860 one_ahead = card->tsq.next + 1;
1861
1862 if (one_ahead == card->tsq.last)
1863 two_ahead = card->tsq.base;
1864 else
1865 two_ahead = one_ahead + 1;
1866
1867 while (!ns_tsi_isempty(card->tsq.next) || !ns_tsi_isempty(one_ahead) ||
1868 !ns_tsi_isempty(two_ahead))
1869 /* At most two empty, as stated in the 77201 errata */
1870 {
1871 serviced_entries = 1;
1872
1873 /* Skip the one or two possible empty entries */
1874 while (ns_tsi_isempty(card->tsq.next)) {
1875 if (card->tsq.next == card->tsq.last)
1876 card->tsq.next = card->tsq.base;
1877 else
1878 card->tsq.next++;
1879 }
1880
1881 if (!ns_tsi_tmrof(card->tsq.next)) {
1882 scdi = ns_tsi_getscdindex(card->tsq.next);
1883 if (scdi == NS_TSI_SCDISVBR)
1884 scq = card->scq0;
1885 else {
1886 if (card->scd2vc[scdi] == NULL) {
1887 printk
1888 ("nicstar%d: could not find VC from SCD index.\n",
1889 card->index);
1890 ns_tsi_init(card->tsq.next);
1891 return;
1892 }
1893 scq = card->scd2vc[scdi]->scq;
1894 }
1895 drain_scq(card, scq, ns_tsi_getscqpos(card->tsq.next));
1896 scq->full = 0;
1897 wake_up_interruptible(&(scq->scqfull_waitq));
1898 }
1899
1900 ns_tsi_init(card->tsq.next);
1901 previous = card->tsq.next;
1902 if (card->tsq.next == card->tsq.last)
1903 card->tsq.next = card->tsq.base;
1904 else
1905 card->tsq.next++;
1906
1907 if (card->tsq.next == card->tsq.last)
1908 one_ahead = card->tsq.base;
1909 else
1910 one_ahead = card->tsq.next + 1;
1911
1912 if (one_ahead == card->tsq.last)
1913 two_ahead = card->tsq.base;
1914 else
1915 two_ahead = one_ahead + 1;
1916 }
1917
1918 if (serviced_entries)
1919 writel(PTR_DIFF(previous, card->tsq.base),
1920 card->membase + TSQH);
1921 }
1922
1923 static void drain_scq(ns_dev * card, scq_info * scq, int pos)
1924 {
1925 struct atm_vcc *vcc;
1926 struct sk_buff *skb;
1927 int i;
1928 unsigned long flags;
1929
1930 XPRINTK("nicstar%d: drain_scq() called, scq at 0x%p, pos %d.\n",
1931 card->index, scq, pos);
1932 if (pos >= scq->num_entries) {
1933 printk("nicstar%d: Bad index on drain_scq().\n", card->index);
1934 return;
1935 }
1936
1937 spin_lock_irqsave(&scq->lock, flags);
1938 i = (int)(scq->tail - scq->base);
1939 if (++i == scq->num_entries)
1940 i = 0;
1941 while (i != pos) {
1942 skb = scq->skb[i];
1943 XPRINTK("nicstar%d: freeing skb at 0x%p (index %d).\n",
1944 card->index, skb, i);
1945 if (skb != NULL) {
1946 pci_unmap_single(card->pcidev,
1947 NS_PRV_DMA(skb),
1948 skb->len,
1949 PCI_DMA_TODEVICE);
1950 vcc = ATM_SKB(skb)->vcc;
1951 if (vcc && vcc->pop != NULL) {
1952 vcc->pop(vcc, skb);
1953 } else {
1954 dev_kfree_skb_irq(skb);
1955 }
1956 scq->skb[i] = NULL;
1957 }
1958 if (++i == scq->num_entries)
1959 i = 0;
1960 }
1961 scq->tail = scq->base + pos;
1962 spin_unlock_irqrestore(&scq->lock, flags);
1963 }
1964
1965 static void process_rsq(ns_dev * card)
1966 {
1967 ns_rsqe *previous;
1968
1969 if (!ns_rsqe_valid(card->rsq.next))
1970 return;
1971 do {
1972 dequeue_rx(card, card->rsq.next);
1973 ns_rsqe_init(card->rsq.next);
1974 previous = card->rsq.next;
1975 if (card->rsq.next == card->rsq.last)
1976 card->rsq.next = card->rsq.base;
1977 else
1978 card->rsq.next++;
1979 } while (ns_rsqe_valid(card->rsq.next));
1980 writel(PTR_DIFF(previous, card->rsq.base), card->membase + RSQH);
1981 }
1982
1983 static void dequeue_rx(ns_dev * card, ns_rsqe * rsqe)
1984 {
1985 u32 vpi, vci;
1986 vc_map *vc;
1987 struct sk_buff *iovb;
1988 struct iovec *iov;
1989 struct atm_vcc *vcc;
1990 struct sk_buff *skb;
1991 unsigned short aal5_len;
1992 int len;
1993 u32 stat;
1994 u32 id;
1995
1996 stat = readl(card->membase + STAT);
1997 card->sbfqc = ns_stat_sfbqc_get(stat);
1998 card->lbfqc = ns_stat_lfbqc_get(stat);
1999
2000 id = le32_to_cpu(rsqe->buffer_handle);
2001 skb = idr_find(&card->idr, id);
2002 if (!skb) {
2003 RXPRINTK(KERN_ERR
2004 "nicstar%d: idr_find() failed!\n", card->index);
2005 return;
2006 }
2007 idr_remove(&card->idr, id);
2008 pci_dma_sync_single_for_cpu(card->pcidev,
2009 NS_PRV_DMA(skb),
2010 (NS_PRV_BUFTYPE(skb) == BUF_SM
2011 ? NS_SMSKBSIZE : NS_LGSKBSIZE),
2012 PCI_DMA_FROMDEVICE);
2013 pci_unmap_single(card->pcidev,
2014 NS_PRV_DMA(skb),
2015 (NS_PRV_BUFTYPE(skb) == BUF_SM
2016 ? NS_SMSKBSIZE : NS_LGSKBSIZE),
2017 PCI_DMA_FROMDEVICE);
2018 vpi = ns_rsqe_vpi(rsqe);
2019 vci = ns_rsqe_vci(rsqe);
2020 if (vpi >= 1UL << card->vpibits || vci >= 1UL << card->vcibits) {
2021 printk("nicstar%d: SDU received for out-of-range vc %d.%d.\n",
2022 card->index, vpi, vci);
2023 recycle_rx_buf(card, skb);
2024 return;
2025 }
2026
2027 vc = &(card->vcmap[vpi << card->vcibits | vci]);
2028 if (!vc->rx) {
2029 RXPRINTK("nicstar%d: SDU received on non-rx vc %d.%d.\n",
2030 card->index, vpi, vci);
2031 recycle_rx_buf(card, skb);
2032 return;
2033 }
2034
2035 vcc = vc->rx_vcc;
2036
2037 if (vcc->qos.aal == ATM_AAL0) {
2038 struct sk_buff *sb;
2039 unsigned char *cell;
2040 int i;
2041
2042 cell = skb->data;
2043 for (i = ns_rsqe_cellcount(rsqe); i; i--) {
2044 if ((sb = dev_alloc_skb(NS_SMSKBSIZE)) == NULL) {
2045 printk
2046 ("nicstar%d: Can't allocate buffers for aal0.\n",
2047 card->index);
2048 atomic_add(i, &vcc->stats->rx_drop);
2049 break;
2050 }
2051 if (!atm_charge(vcc, sb->truesize)) {
2052 RXPRINTK
2053 ("nicstar%d: atm_charge() dropped aal0 packets.\n",
2054 card->index);
2055 atomic_add(i - 1, &vcc->stats->rx_drop); /* already increased by 1 */
2056 dev_kfree_skb_any(sb);
2057 break;
2058 }
2059 /* Rebuild the header */
2060 *((u32 *) sb->data) = le32_to_cpu(rsqe->word_1) << 4 |
2061 (ns_rsqe_clp(rsqe) ? 0x00000001 : 0x00000000);
2062 if (i == 1 && ns_rsqe_eopdu(rsqe))
2063 *((u32 *) sb->data) |= 0x00000002;
2064 skb_put(sb, NS_AAL0_HEADER);
2065 memcpy(skb_tail_pointer(sb), cell, ATM_CELL_PAYLOAD);
2066 skb_put(sb, ATM_CELL_PAYLOAD);
2067 ATM_SKB(sb)->vcc = vcc;
2068 __net_timestamp(sb);
2069 vcc->push(vcc, sb);
2070 atomic_inc(&vcc->stats->rx);
2071 cell += ATM_CELL_PAYLOAD;
2072 }
2073
2074 recycle_rx_buf(card, skb);
2075 return;
2076 }
2077
2078 /* To reach this point, the AAL layer can only be AAL5 */
2079
2080 if ((iovb = vc->rx_iov) == NULL) {
2081 iovb = skb_dequeue(&(card->iovpool.queue));
2082 if (iovb == NULL) { /* No buffers in the queue */
2083 iovb = alloc_skb(NS_IOVBUFSIZE, GFP_ATOMIC);
2084 if (iovb == NULL) {
2085 printk("nicstar%d: Out of iovec buffers.\n",
2086 card->index);
2087 atomic_inc(&vcc->stats->rx_drop);
2088 recycle_rx_buf(card, skb);
2089 return;
2090 }
2091 NS_PRV_BUFTYPE(iovb) = BUF_NONE;
2092 } else if (--card->iovpool.count < card->iovnr.min) {
2093 struct sk_buff *new_iovb;
2094 if ((new_iovb =
2095 alloc_skb(NS_IOVBUFSIZE, GFP_ATOMIC)) != NULL) {
2096 NS_PRV_BUFTYPE(iovb) = BUF_NONE;
2097 skb_queue_tail(&card->iovpool.queue, new_iovb);
2098 card->iovpool.count++;
2099 }
2100 }
2101 vc->rx_iov = iovb;
2102 NS_PRV_IOVCNT(iovb) = 0;
2103 iovb->len = 0;
2104 iovb->data = iovb->head;
2105 skb_reset_tail_pointer(iovb);
2106 /* IMPORTANT: a pointer to the sk_buff containing the small or large
2107 buffer is stored as iovec base, NOT a pointer to the
2108 small or large buffer itself. */
2109 } else if (NS_PRV_IOVCNT(iovb) >= NS_MAX_IOVECS) {
2110 printk("nicstar%d: received too big AAL5 SDU.\n", card->index);
2111 atomic_inc(&vcc->stats->rx_err);
2112 recycle_iovec_rx_bufs(card, (struct iovec *)iovb->data,
2113 NS_MAX_IOVECS);
2114 NS_PRV_IOVCNT(iovb) = 0;
2115 iovb->len = 0;
2116 iovb->data = iovb->head;
2117 skb_reset_tail_pointer(iovb);
2118 }
2119 iov = &((struct iovec *)iovb->data)[NS_PRV_IOVCNT(iovb)++];
2120 iov->iov_base = (void *)skb;
2121 iov->iov_len = ns_rsqe_cellcount(rsqe) * 48;
2122 iovb->len += iov->iov_len;
2123
2124 #ifdef EXTRA_DEBUG
2125 if (NS_PRV_IOVCNT(iovb) == 1) {
2126 if (NS_PRV_BUFTYPE(skb) != BUF_SM) {
2127 printk
2128 ("nicstar%d: Expected a small buffer, and this is not one.\n",
2129 card->index);
2130 which_list(card, skb);
2131 atomic_inc(&vcc->stats->rx_err);
2132 recycle_rx_buf(card, skb);
2133 vc->rx_iov = NULL;
2134 recycle_iov_buf(card, iovb);
2135 return;
2136 }
2137 } else { /* NS_PRV_IOVCNT(iovb) >= 2 */
2138
2139 if (NS_PRV_BUFTYPE(skb) != BUF_LG) {
2140 printk
2141 ("nicstar%d: Expected a large buffer, and this is not one.\n",
2142 card->index);
2143 which_list(card, skb);
2144 atomic_inc(&vcc->stats->rx_err);
2145 recycle_iovec_rx_bufs(card, (struct iovec *)iovb->data,
2146 NS_PRV_IOVCNT(iovb));
2147 vc->rx_iov = NULL;
2148 recycle_iov_buf(card, iovb);
2149 return;
2150 }
2151 }
2152 #endif /* EXTRA_DEBUG */
2153
2154 if (ns_rsqe_eopdu(rsqe)) {
2155 /* This works correctly regardless of the endianness of the host */
2156 unsigned char *L1L2 = (unsigned char *)
2157 (skb->data + iov->iov_len - 6);
2158 aal5_len = L1L2[0] << 8 | L1L2[1];
2159 len = (aal5_len == 0x0000) ? 0x10000 : aal5_len;
2160 if (ns_rsqe_crcerr(rsqe) ||
2161 len + 8 > iovb->len || len + (47 + 8) < iovb->len) {
2162 printk("nicstar%d: AAL5 CRC error", card->index);
2163 if (len + 8 > iovb->len || len + (47 + 8) < iovb->len)
2164 printk(" - PDU size mismatch.\n");
2165 else
2166 printk(".\n");
2167 atomic_inc(&vcc->stats->rx_err);
2168 recycle_iovec_rx_bufs(card, (struct iovec *)iovb->data,
2169 NS_PRV_IOVCNT(iovb));
2170 vc->rx_iov = NULL;
2171 recycle_iov_buf(card, iovb);
2172 return;
2173 }
2174
2175 /* By this point we (hopefully) have a complete SDU without errors. */
2176
2177 if (NS_PRV_IOVCNT(iovb) == 1) { /* Just a small buffer */
2178 /* skb points to a small buffer */
2179 if (!atm_charge(vcc, skb->truesize)) {
2180 push_rxbufs(card, skb);
2181 atomic_inc(&vcc->stats->rx_drop);
2182 } else {
2183 skb_put(skb, len);
2184 dequeue_sm_buf(card, skb);
2185 #ifdef NS_USE_DESTRUCTORS
2186 skb->destructor = ns_sb_destructor;
2187 #endif /* NS_USE_DESTRUCTORS */
2188 ATM_SKB(skb)->vcc = vcc;
2189 __net_timestamp(skb);
2190 vcc->push(vcc, skb);
2191 atomic_inc(&vcc->stats->rx);
2192 }
2193 } else if (NS_PRV_IOVCNT(iovb) == 2) { /* One small plus one large buffer */
2194 struct sk_buff *sb;
2195
2196 sb = (struct sk_buff *)(iov - 1)->iov_base;
2197 /* skb points to a large buffer */
2198
2199 if (len <= NS_SMBUFSIZE) {
2200 if (!atm_charge(vcc, sb->truesize)) {
2201 push_rxbufs(card, sb);
2202 atomic_inc(&vcc->stats->rx_drop);
2203 } else {
2204 skb_put(sb, len);
2205 dequeue_sm_buf(card, sb);
2206 #ifdef NS_USE_DESTRUCTORS
2207 sb->destructor = ns_sb_destructor;
2208 #endif /* NS_USE_DESTRUCTORS */
2209 ATM_SKB(sb)->vcc = vcc;
2210 __net_timestamp(sb);
2211 vcc->push(vcc, sb);
2212 atomic_inc(&vcc->stats->rx);
2213 }
2214
2215 push_rxbufs(card, skb);
2216
2217 } else { /* len > NS_SMBUFSIZE, the usual case */
2218
2219 if (!atm_charge(vcc, skb->truesize)) {
2220 push_rxbufs(card, skb);
2221 atomic_inc(&vcc->stats->rx_drop);
2222 } else {
2223 dequeue_lg_buf(card, skb);
2224 #ifdef NS_USE_DESTRUCTORS
2225 skb->destructor = ns_lb_destructor;
2226 #endif /* NS_USE_DESTRUCTORS */
2227 skb_push(skb, NS_SMBUFSIZE);
2228 skb_copy_from_linear_data(sb, skb->data,
2229 NS_SMBUFSIZE);
2230 skb_put(skb, len - NS_SMBUFSIZE);
2231 ATM_SKB(skb)->vcc = vcc;
2232 __net_timestamp(skb);
2233 vcc->push(vcc, skb);
2234 atomic_inc(&vcc->stats->rx);
2235 }
2236
2237 push_rxbufs(card, sb);
2238
2239 }
2240
2241 } else { /* Must push a huge buffer */
2242
2243 struct sk_buff *hb, *sb, *lb;
2244 int remaining, tocopy;
2245 int j;
2246
2247 hb = skb_dequeue(&(card->hbpool.queue));
2248 if (hb == NULL) { /* No buffers in the queue */
2249
2250 hb = dev_alloc_skb(NS_HBUFSIZE);
2251 if (hb == NULL) {
2252 printk
2253 ("nicstar%d: Out of huge buffers.\n",
2254 card->index);
2255 atomic_inc(&vcc->stats->rx_drop);
2256 recycle_iovec_rx_bufs(card,
2257 (struct iovec *)
2258 iovb->data,
2259 NS_PRV_IOVCNT(iovb));
2260 vc->rx_iov = NULL;
2261 recycle_iov_buf(card, iovb);
2262 return;
2263 } else if (card->hbpool.count < card->hbnr.min) {
2264 struct sk_buff *new_hb;
2265 if ((new_hb =
2266 dev_alloc_skb(NS_HBUFSIZE)) !=
2267 NULL) {
2268 skb_queue_tail(&card->hbpool.
2269 queue, new_hb);
2270 card->hbpool.count++;
2271 }
2272 }
2273 NS_PRV_BUFTYPE(hb) = BUF_NONE;
2274 } else if (--card->hbpool.count < card->hbnr.min) {
2275 struct sk_buff *new_hb;
2276 if ((new_hb =
2277 dev_alloc_skb(NS_HBUFSIZE)) != NULL) {
2278 NS_PRV_BUFTYPE(new_hb) = BUF_NONE;
2279 skb_queue_tail(&card->hbpool.queue,
2280 new_hb);
2281 card->hbpool.count++;
2282 }
2283 if (card->hbpool.count < card->hbnr.min) {
2284 if ((new_hb =
2285 dev_alloc_skb(NS_HBUFSIZE)) !=
2286 NULL) {
2287 NS_PRV_BUFTYPE(new_hb) =
2288 BUF_NONE;
2289 skb_queue_tail(&card->hbpool.
2290 queue, new_hb);
2291 card->hbpool.count++;
2292 }
2293 }
2294 }
2295
2296 iov = (struct iovec *)iovb->data;
2297
2298 if (!atm_charge(vcc, hb->truesize)) {
2299 recycle_iovec_rx_bufs(card, iov,
2300 NS_PRV_IOVCNT(iovb));
2301 if (card->hbpool.count < card->hbnr.max) {
2302 skb_queue_tail(&card->hbpool.queue, hb);
2303 card->hbpool.count++;
2304 } else
2305 dev_kfree_skb_any(hb);
2306 atomic_inc(&vcc->stats->rx_drop);
2307 } else {
2308 /* Copy the small buffer to the huge buffer */
2309 sb = (struct sk_buff *)iov->iov_base;
2310 skb_copy_from_linear_data(sb, hb->data,
2311 iov->iov_len);
2312 skb_put(hb, iov->iov_len);
2313 remaining = len - iov->iov_len;
2314 iov++;
2315 /* Free the small buffer */
2316 push_rxbufs(card, sb);
2317
2318 /* Copy all large buffers to the huge buffer and free them */
2319 for (j = 1; j < NS_PRV_IOVCNT(iovb); j++) {
2320 lb = (struct sk_buff *)iov->iov_base;
2321 tocopy =
2322 min_t(int, remaining, iov->iov_len);
2323 skb_copy_from_linear_data(lb,
2324 skb_tail_pointer
2325 (hb), tocopy);
2326 skb_put(hb, tocopy);
2327 iov++;
2328 remaining -= tocopy;
2329 push_rxbufs(card, lb);
2330 }
2331 #ifdef EXTRA_DEBUG
2332 if (remaining != 0 || hb->len != len)
2333 printk
2334 ("nicstar%d: Huge buffer len mismatch.\n",
2335 card->index);
2336 #endif /* EXTRA_DEBUG */
2337 ATM_SKB(hb)->vcc = vcc;
2338 #ifdef NS_USE_DESTRUCTORS
2339 hb->destructor = ns_hb_destructor;
2340 #endif /* NS_USE_DESTRUCTORS */
2341 __net_timestamp(hb);
2342 vcc->push(vcc, hb);
2343 atomic_inc(&vcc->stats->rx);
2344 }
2345 }
2346
2347 vc->rx_iov = NULL;
2348 recycle_iov_buf(card, iovb);
2349 }
2350
2351 }
2352
2353 #ifdef NS_USE_DESTRUCTORS
2354
2355 static void ns_sb_destructor(struct sk_buff *sb)
2356 {
2357 ns_dev *card;
2358 u32 stat;
2359
2360 card = (ns_dev *) ATM_SKB(sb)->vcc->dev->dev_data;
2361 stat = readl(card->membase + STAT);
2362 card->sbfqc = ns_stat_sfbqc_get(stat);
2363 card->lbfqc = ns_stat_lfbqc_get(stat);
2364
2365 do {
2366 sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
2367 if (sb == NULL)
2368 break;
2369 NS_PRV_BUFTYPE(sb) = BUF_SM;
2370 skb_queue_tail(&card->sbpool.queue, sb);
2371 skb_reserve(sb, NS_AAL0_HEADER);
2372 push_rxbufs(card, sb);
2373 } while (card->sbfqc < card->sbnr.min);
2374 }
2375
2376 static void ns_lb_destructor(struct sk_buff *lb)
2377 {
2378 ns_dev *card;
2379 u32 stat;
2380
2381 card = (ns_dev *) ATM_SKB(lb)->vcc->dev->dev_data;
2382 stat = readl(card->membase + STAT);
2383 card->sbfqc = ns_stat_sfbqc_get(stat);
2384 card->lbfqc = ns_stat_lfbqc_get(stat);
2385
2386 do {
2387 lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
2388 if (lb == NULL)
2389 break;
2390 NS_PRV_BUFTYPE(lb) = BUF_LG;
2391 skb_queue_tail(&card->lbpool.queue, lb);
2392 skb_reserve(lb, NS_SMBUFSIZE);
2393 push_rxbufs(card, lb);
2394 } while (card->lbfqc < card->lbnr.min);
2395 }
2396
2397 static void ns_hb_destructor(struct sk_buff *hb)
2398 {
2399 ns_dev *card;
2400
2401 card = (ns_dev *) ATM_SKB(hb)->vcc->dev->dev_data;
2402
2403 while (card->hbpool.count < card->hbnr.init) {
2404 hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
2405 if (hb == NULL)
2406 break;
2407 NS_PRV_BUFTYPE(hb) = BUF_NONE;
2408 skb_queue_tail(&card->hbpool.queue, hb);
2409 card->hbpool.count++;
2410 }
2411 }
2412
2413 #endif /* NS_USE_DESTRUCTORS */
2414
2415 static void recycle_rx_buf(ns_dev * card, struct sk_buff *skb)
2416 {
2417 if (unlikely(NS_PRV_BUFTYPE(skb) == BUF_NONE)) {
2418 printk("nicstar%d: What kind of rx buffer is this?\n",
2419 card->index);
2420 dev_kfree_skb_any(skb);
2421 } else
2422 push_rxbufs(card, skb);
2423 }
2424
2425 static void recycle_iovec_rx_bufs(ns_dev * card, struct iovec *iov, int count)
2426 {
2427 while (count-- > 0)
2428 recycle_rx_buf(card, (struct sk_buff *)(iov++)->iov_base);
2429 }
2430
2431 static void recycle_iov_buf(ns_dev * card, struct sk_buff *iovb)
2432 {
2433 if (card->iovpool.count < card->iovnr.max) {
2434 skb_queue_tail(&card->iovpool.queue, iovb);
2435 card->iovpool.count++;
2436 } else
2437 dev_kfree_skb_any(iovb);
2438 }
2439
2440 static void dequeue_sm_buf(ns_dev * card, struct sk_buff *sb)
2441 {
2442 skb_unlink(sb, &card->sbpool.queue);
2443 #ifdef NS_USE_DESTRUCTORS
2444 if (card->sbfqc < card->sbnr.min)
2445 #else
2446 if (card->sbfqc < card->sbnr.init) {
2447 struct sk_buff *new_sb;
2448 if ((new_sb = dev_alloc_skb(NS_SMSKBSIZE)) != NULL) {
2449 NS_PRV_BUFTYPE(new_sb) = BUF_SM;
2450 skb_queue_tail(&card->sbpool.queue, new_sb);
2451 skb_reserve(new_sb, NS_AAL0_HEADER);
2452 push_rxbufs(card, new_sb);
2453 }
2454 }
2455 if (card->sbfqc < card->sbnr.init)
2456 #endif /* NS_USE_DESTRUCTORS */
2457 {
2458 struct sk_buff *new_sb;
2459 if ((new_sb = dev_alloc_skb(NS_SMSKBSIZE)) != NULL) {
2460 NS_PRV_BUFTYPE(new_sb) = BUF_SM;
2461 skb_queue_tail(&card->sbpool.queue, new_sb);
2462 skb_reserve(new_sb, NS_AAL0_HEADER);
2463 push_rxbufs(card, new_sb);
2464 }
2465 }
2466 }
2467
2468 static void dequeue_lg_buf(ns_dev * card, struct sk_buff *lb)
2469 {
2470 skb_unlink(lb, &card->lbpool.queue);
2471 #ifdef NS_USE_DESTRUCTORS
2472 if (card->lbfqc < card->lbnr.min)
2473 #else
2474 if (card->lbfqc < card->lbnr.init) {
2475 struct sk_buff *new_lb;
2476 if ((new_lb = dev_alloc_skb(NS_LGSKBSIZE)) != NULL) {
2477 NS_PRV_BUFTYPE(new_lb) = BUF_LG;
2478 skb_queue_tail(&card->lbpool.queue, new_lb);
2479 skb_reserve(new_lb, NS_SMBUFSIZE);
2480 push_rxbufs(card, new_lb);
2481 }
2482 }
2483 if (card->lbfqc < card->lbnr.init)
2484 #endif /* NS_USE_DESTRUCTORS */
2485 {
2486 struct sk_buff *new_lb;
2487 if ((new_lb = dev_alloc_skb(NS_LGSKBSIZE)) != NULL) {
2488 NS_PRV_BUFTYPE(new_lb) = BUF_LG;
2489 skb_queue_tail(&card->lbpool.queue, new_lb);
2490 skb_reserve(new_lb, NS_SMBUFSIZE);
2491 push_rxbufs(card, new_lb);
2492 }
2493 }
2494 }
2495
2496 static int ns_proc_read(struct atm_dev *dev, loff_t * pos, char *page)
2497 {
2498 u32 stat;
2499 ns_dev *card;
2500 int left;
2501
2502 left = (int)*pos;
2503 card = (ns_dev *) dev->dev_data;
2504 stat = readl(card->membase + STAT);
2505 if (!left--)
2506 return sprintf(page, "Pool count min init max \n");
2507 if (!left--)
2508 return sprintf(page, "Small %5d %5d %5d %5d \n",
2509 ns_stat_sfbqc_get(stat), card->sbnr.min,
2510 card->sbnr.init, card->sbnr.max);
2511 if (!left--)
2512 return sprintf(page, "Large %5d %5d %5d %5d \n",
2513 ns_stat_lfbqc_get(stat), card->lbnr.min,
2514 card->lbnr.init, card->lbnr.max);
2515 if (!left--)
2516 return sprintf(page, "Huge %5d %5d %5d %5d \n",
2517 card->hbpool.count, card->hbnr.min,
2518 card->hbnr.init, card->hbnr.max);
2519 if (!left--)
2520 return sprintf(page, "Iovec %5d %5d %5d %5d \n",
2521 card->iovpool.count, card->iovnr.min,
2522 card->iovnr.init, card->iovnr.max);
2523 if (!left--) {
2524 int retval;
2525 retval =
2526 sprintf(page, "Interrupt counter: %u \n", card->intcnt);
2527 card->intcnt = 0;
2528 return retval;
2529 }
2530 #if 0
2531 /* Dump 25.6 Mbps PHY registers */
2532 /* Now there's a 25.6 Mbps PHY driver this code isn't needed. I left it
2533 here just in case it's needed for debugging. */
2534 if (card->max_pcr == ATM_25_PCR && !left--) {
2535 u32 phy_regs[4];
2536 u32 i;
2537
2538 for (i = 0; i < 4; i++) {
2539 while (CMD_BUSY(card)) ;
2540 writel(NS_CMD_READ_UTILITY | 0x00000200 | i,
2541 card->membase + CMD);
2542 while (CMD_BUSY(card)) ;
2543 phy_regs[i] = readl(card->membase + DR0) & 0x000000FF;
2544 }
2545
2546 return sprintf(page, "PHY regs: 0x%02X 0x%02X 0x%02X 0x%02X \n",
2547 phy_regs[0], phy_regs[1], phy_regs[2],
2548 phy_regs[3]);
2549 }
2550 #endif /* 0 - Dump 25.6 Mbps PHY registers */
2551 #if 0
2552 /* Dump TST */
2553 if (left-- < NS_TST_NUM_ENTRIES) {
2554 if (card->tste2vc[left + 1] == NULL)
2555 return sprintf(page, "%5d - VBR/UBR \n", left + 1);
2556 else
2557 return sprintf(page, "%5d - %d %d \n", left + 1,
2558 card->tste2vc[left + 1]->tx_vcc->vpi,
2559 card->tste2vc[left + 1]->tx_vcc->vci);
2560 }
2561 #endif /* 0 */
2562 return 0;
2563 }
2564
2565 static int ns_ioctl(struct atm_dev *dev, unsigned int cmd, void __user * arg)
2566 {
2567 ns_dev *card;
2568 pool_levels pl;
2569 long btype;
2570 unsigned long flags;
2571
2572 card = dev->dev_data;
2573 switch (cmd) {
2574 case NS_GETPSTAT:
2575 if (get_user
2576 (pl.buftype, &((pool_levels __user *) arg)->buftype))
2577 return -EFAULT;
2578 switch (pl.buftype) {
2579 case NS_BUFTYPE_SMALL:
2580 pl.count =
2581 ns_stat_sfbqc_get(readl(card->membase + STAT));
2582 pl.level.min = card->sbnr.min;
2583 pl.level.init = card->sbnr.init;
2584 pl.level.max = card->sbnr.max;
2585 break;
2586
2587 case NS_BUFTYPE_LARGE:
2588 pl.count =
2589 ns_stat_lfbqc_get(readl(card->membase + STAT));
2590 pl.level.min = card->lbnr.min;
2591 pl.level.init = card->lbnr.init;
2592 pl.level.max = card->lbnr.max;
2593 break;
2594
2595 case NS_BUFTYPE_HUGE:
2596 pl.count = card->hbpool.count;
2597 pl.level.min = card->hbnr.min;
2598 pl.level.init = card->hbnr.init;
2599 pl.level.max = card->hbnr.max;
2600 break;
2601
2602 case NS_BUFTYPE_IOVEC:
2603 pl.count = card->iovpool.count;
2604 pl.level.min = card->iovnr.min;
2605 pl.level.init = card->iovnr.init;
2606 pl.level.max = card->iovnr.max;
2607 break;
2608
2609 default:
2610 return -ENOIOCTLCMD;
2611
2612 }
2613 if (!copy_to_user((pool_levels __user *) arg, &pl, sizeof(pl)))
2614 return (sizeof(pl));
2615 else
2616 return -EFAULT;
2617
2618 case NS_SETBUFLEV:
2619 if (!capable(CAP_NET_ADMIN))
2620 return -EPERM;
2621 if (copy_from_user(&pl, (pool_levels __user *) arg, sizeof(pl)))
2622 return -EFAULT;
2623 if (pl.level.min >= pl.level.init
2624 || pl.level.init >= pl.level.max)
2625 return -EINVAL;
2626 if (pl.level.min == 0)
2627 return -EINVAL;
2628 switch (pl.buftype) {
2629 case NS_BUFTYPE_SMALL:
2630 if (pl.level.max > TOP_SB)
2631 return -EINVAL;
2632 card->sbnr.min = pl.level.min;
2633 card->sbnr.init = pl.level.init;
2634 card->sbnr.max = pl.level.max;
2635 break;
2636
2637 case NS_BUFTYPE_LARGE:
2638 if (pl.level.max > TOP_LB)
2639 return -EINVAL;
2640 card->lbnr.min = pl.level.min;
2641 card->lbnr.init = pl.level.init;
2642 card->lbnr.max = pl.level.max;
2643 break;
2644
2645 case NS_BUFTYPE_HUGE:
2646 if (pl.level.max > TOP_HB)
2647 return -EINVAL;
2648 card->hbnr.min = pl.level.min;
2649 card->hbnr.init = pl.level.init;
2650 card->hbnr.max = pl.level.max;
2651 break;
2652
2653 case NS_BUFTYPE_IOVEC:
2654 if (pl.level.max > TOP_IOVB)
2655 return -EINVAL;
2656 card->iovnr.min = pl.level.min;
2657 card->iovnr.init = pl.level.init;
2658 card->iovnr.max = pl.level.max;
2659 break;
2660
2661 default:
2662 return -EINVAL;
2663
2664 }
2665 return 0;
2666
2667 case NS_ADJBUFLEV:
2668 if (!capable(CAP_NET_ADMIN))
2669 return -EPERM;
2670 btype = (long)arg; /* a long is the same size as a pointer or bigger */
2671 switch (btype) {
2672 case NS_BUFTYPE_SMALL:
2673 while (card->sbfqc < card->sbnr.init) {
2674 struct sk_buff *sb;
2675
2676 sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
2677 if (sb == NULL)
2678 return -ENOMEM;
2679 NS_PRV_BUFTYPE(sb) = BUF_SM;
2680 skb_queue_tail(&card->sbpool.queue, sb);
2681 skb_reserve(sb, NS_AAL0_HEADER);
2682 push_rxbufs(card, sb);
2683 }
2684 break;
2685
2686 case NS_BUFTYPE_LARGE:
2687 while (card->lbfqc < card->lbnr.init) {
2688 struct sk_buff *lb;
2689
2690 lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
2691 if (lb == NULL)
2692 return -ENOMEM;
2693 NS_PRV_BUFTYPE(lb) = BUF_LG;
2694 skb_queue_tail(&card->lbpool.queue, lb);
2695 skb_reserve(lb, NS_SMBUFSIZE);
2696 push_rxbufs(card, lb);
2697 }
2698 break;
2699
2700 case NS_BUFTYPE_HUGE:
2701 while (card->hbpool.count > card->hbnr.init) {
2702 struct sk_buff *hb;
2703
2704 spin_lock_irqsave(&card->int_lock, flags);
2705 hb = skb_dequeue(&card->hbpool.queue);
2706 card->hbpool.count--;
2707 spin_unlock_irqrestore(&card->int_lock, flags);
2708 if (hb == NULL)
2709 printk
2710 ("nicstar%d: huge buffer count inconsistent.\n",
2711 card->index);
2712 else
2713 dev_kfree_skb_any(hb);
2714
2715 }
2716 while (card->hbpool.count < card->hbnr.init) {
2717 struct sk_buff *hb;
2718
2719 hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
2720 if (hb == NULL)
2721 return -ENOMEM;
2722 NS_PRV_BUFTYPE(hb) = BUF_NONE;
2723 spin_lock_irqsave(&card->int_lock, flags);
2724 skb_queue_tail(&card->hbpool.queue, hb);
2725 card->hbpool.count++;
2726 spin_unlock_irqrestore(&card->int_lock, flags);
2727 }
2728 break;
2729
2730 case NS_BUFTYPE_IOVEC:
2731 while (card->iovpool.count > card->iovnr.init) {
2732 struct sk_buff *iovb;
2733
2734 spin_lock_irqsave(&card->int_lock, flags);
2735 iovb = skb_dequeue(&card->iovpool.queue);
2736 card->iovpool.count--;
2737 spin_unlock_irqrestore(&card->int_lock, flags);
2738 if (iovb == NULL)
2739 printk
2740 ("nicstar%d: iovec buffer count inconsistent.\n",
2741 card->index);
2742 else
2743 dev_kfree_skb_any(iovb);
2744
2745 }
2746 while (card->iovpool.count < card->iovnr.init) {
2747 struct sk_buff *iovb;
2748
2749 iovb = alloc_skb(NS_IOVBUFSIZE, GFP_KERNEL);
2750 if (iovb == NULL)
2751 return -ENOMEM;
2752 NS_PRV_BUFTYPE(iovb) = BUF_NONE;
2753 spin_lock_irqsave(&card->int_lock, flags);
2754 skb_queue_tail(&card->iovpool.queue, iovb);
2755 card->iovpool.count++;
2756 spin_unlock_irqrestore(&card->int_lock, flags);
2757 }
2758 break;
2759
2760 default:
2761 return -EINVAL;
2762
2763 }
2764 return 0;
2765
2766 default:
2767 if (dev->phy && dev->phy->ioctl) {
2768 return dev->phy->ioctl(dev, cmd, arg);
2769 } else {
2770 printk("nicstar%d: %s == NULL \n", card->index,
2771 dev->phy ? "dev->phy->ioctl" : "dev->phy");
2772 return -ENOIOCTLCMD;
2773 }
2774 }
2775 }
2776
2777 #ifdef EXTRA_DEBUG
2778 static void which_list(ns_dev * card, struct sk_buff *skb)
2779 {
2780 printk("skb buf_type: 0x%08x\n", NS_PRV_BUFTYPE(skb));
2781 }
2782 #endif /* EXTRA_DEBUG */
2783
2784 static void ns_poll(unsigned long arg)
2785 {
2786 int i;
2787 ns_dev *card;
2788 unsigned long flags;
2789 u32 stat_r, stat_w;
2790
2791 PRINTK("nicstar: Entering ns_poll().\n");
2792 for (i = 0; i < num_cards; i++) {
2793 card = cards[i];
2794 if (spin_is_locked(&card->int_lock)) {
2795 /* Probably it isn't worth spinning */
2796 continue;
2797 }
2798 spin_lock_irqsave(&card->int_lock, flags);
2799
2800 stat_w = 0;
2801 stat_r = readl(card->membase + STAT);
2802 if (stat_r & NS_STAT_TSIF)
2803 stat_w |= NS_STAT_TSIF;
2804 if (stat_r & NS_STAT_EOPDU)
2805 stat_w |= NS_STAT_EOPDU;
2806
2807 process_tsq(card);
2808 process_rsq(card);
2809
2810 writel(stat_w, card->membase + STAT);
2811 spin_unlock_irqrestore(&card->int_lock, flags);
2812 }
2813 mod_timer(&ns_timer, jiffies + NS_POLL_PERIOD);
2814 PRINTK("nicstar: Leaving ns_poll().\n");
2815 }
2816
2817 static int ns_parse_mac(char *mac, unsigned char *esi)
2818 {
2819 int i, j;
2820 short byte1, byte0;
2821
2822 if (mac == NULL || esi == NULL)
2823 return -1;
2824 j = 0;
2825 for (i = 0; i < 6; i++) {
2826 if ((byte1 = hex_to_bin(mac[j++])) < 0)
2827 return -1;
2828 if ((byte0 = hex_to_bin(mac[j++])) < 0)
2829 return -1;
2830 esi[i] = (unsigned char)(byte1 * 16 + byte0);
2831 if (i < 5) {
2832 if (mac[j++] != ':')
2833 return -1;
2834 }
2835 }
2836 return 0;
2837 }
2838
2839
2840 static void ns_phy_put(struct atm_dev *dev, unsigned char value,
2841 unsigned long addr)
2842 {
2843 ns_dev *card;
2844 unsigned long flags;
2845
2846 card = dev->dev_data;
2847 spin_lock_irqsave(&card->res_lock, flags);
2848 while (CMD_BUSY(card)) ;
2849 writel((u32) value, card->membase + DR0);
2850 writel(NS_CMD_WRITE_UTILITY | 0x00000200 | (addr & 0x000000FF),
2851 card->membase + CMD);
2852 spin_unlock_irqrestore(&card->res_lock, flags);
2853 }
2854
2855 static unsigned char ns_phy_get(struct atm_dev *dev, unsigned long addr)
2856 {
2857 ns_dev *card;
2858 unsigned long flags;
2859 u32 data;
2860
2861 card = dev->dev_data;
2862 spin_lock_irqsave(&card->res_lock, flags);
2863 while (CMD_BUSY(card)) ;
2864 writel(NS_CMD_READ_UTILITY | 0x00000200 | (addr & 0x000000FF),
2865 card->membase + CMD);
2866 while (CMD_BUSY(card)) ;
2867 data = readl(card->membase + DR0) & 0x000000FF;
2868 spin_unlock_irqrestore(&card->res_lock, flags);
2869 return (unsigned char)data;
2870 }
2871
2872 module_init(nicstar_init);
2873 module_exit(nicstar_cleanup);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree