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Merge tag 'firewire-update2' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee139...
[deliverable/linux.git] / drivers / atm / nicstar.c
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 <linux/atomic.h>
55 #include <linux/etherdevice.h>
56 #include "nicstar.h"
57 #ifdef CONFIG_ATM_NICSTAR_USE_SUNI
58 #include "suni.h"
59 #endif /* CONFIG_ATM_NICSTAR_USE_SUNI */
60 #ifdef CONFIG_ATM_NICSTAR_USE_IDT77105
61 #include "idt77105.h"
62 #endif /* CONFIG_ATM_NICSTAR_USE_IDT77105 */
63
64 /* Additional code */
65
66 #include "nicstarmac.c"
67
68 /* Configurable parameters */
69
70 #undef PHY_LOOPBACK
71 #undef TX_DEBUG
72 #undef RX_DEBUG
73 #undef GENERAL_DEBUG
74 #undef EXTRA_DEBUG
75
76 /* Do not touch these */
77
78 #ifdef TX_DEBUG
79 #define TXPRINTK(args...) printk(args)
80 #else
81 #define TXPRINTK(args...)
82 #endif /* TX_DEBUG */
83
84 #ifdef RX_DEBUG
85 #define RXPRINTK(args...) printk(args)
86 #else
87 #define RXPRINTK(args...)
88 #endif /* RX_DEBUG */
89
90 #ifdef GENERAL_DEBUG
91 #define PRINTK(args...) printk(args)
92 #else
93 #define PRINTK(args...)
94 #endif /* GENERAL_DEBUG */
95
96 #ifdef EXTRA_DEBUG
97 #define XPRINTK(args...) printk(args)
98 #else
99 #define XPRINTK(args...)
100 #endif /* EXTRA_DEBUG */
101
102 /* Macros */
103
104 #define CMD_BUSY(card) (readl((card)->membase + STAT) & NS_STAT_CMDBZ)
105
106 #define NS_DELAY mdelay(1)
107
108 #define PTR_DIFF(a, b) ((u32)((unsigned long)(a) - (unsigned long)(b)))
109
110 #ifndef ATM_SKB
111 #define ATM_SKB(s) (&(s)->atm)
112 #endif
113
114 #define scq_virt_to_bus(scq, p) \
115 (scq->dma + ((unsigned long)(p) - (unsigned long)(scq)->org))
116
117 /* Function declarations */
118
119 static u32 ns_read_sram(ns_dev * card, u32 sram_address);
120 static void ns_write_sram(ns_dev * card, u32 sram_address, u32 * value,
121 int count);
122 static int ns_init_card(int i, struct pci_dev *pcidev);
123 static void ns_init_card_error(ns_dev * card, int error);
124 static scq_info *get_scq(ns_dev *card, int size, u32 scd);
125 static void free_scq(ns_dev *card, scq_info * scq, struct atm_vcc *vcc);
126 static void push_rxbufs(ns_dev *, struct sk_buff *);
127 static irqreturn_t ns_irq_handler(int irq, void *dev_id);
128 static int ns_open(struct atm_vcc *vcc);
129 static void ns_close(struct atm_vcc *vcc);
130 static void fill_tst(ns_dev * card, int n, vc_map * vc);
131 static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb);
132 static int push_scqe(ns_dev * card, vc_map * vc, scq_info * scq, ns_scqe * tbd,
133 struct sk_buff *skb);
134 static void process_tsq(ns_dev * card);
135 static void drain_scq(ns_dev * card, scq_info * scq, int pos);
136 static void process_rsq(ns_dev * card);
137 static void dequeue_rx(ns_dev * card, ns_rsqe * rsqe);
138 static void recycle_rx_buf(ns_dev * card, struct sk_buff *skb);
139 static void recycle_iovec_rx_bufs(ns_dev * card, struct iovec *iov, int count);
140 static void recycle_iov_buf(ns_dev * card, struct sk_buff *iovb);
141 static void dequeue_sm_buf(ns_dev * card, struct sk_buff *sb);
142 static void dequeue_lg_buf(ns_dev * card, struct sk_buff *lb);
143 static int ns_proc_read(struct atm_dev *dev, loff_t * pos, char *page);
144 static int ns_ioctl(struct atm_dev *dev, unsigned int cmd, void __user * arg);
145 #ifdef EXTRA_DEBUG
146 static void which_list(ns_dev * card, struct sk_buff *skb);
147 #endif
148 static void ns_poll(unsigned long arg);
149 static void ns_phy_put(struct atm_dev *dev, unsigned char value,
150 unsigned long addr);
151 static unsigned char ns_phy_get(struct atm_dev *dev, unsigned long addr);
152
153 /* Global variables */
154
155 static struct ns_dev *cards[NS_MAX_CARDS];
156 static unsigned num_cards;
157 static struct atmdev_ops atm_ops = {
158 .open = ns_open,
159 .close = ns_close,
160 .ioctl = ns_ioctl,
161 .send = ns_send,
162 .phy_put = ns_phy_put,
163 .phy_get = ns_phy_get,
164 .proc_read = ns_proc_read,
165 .owner = THIS_MODULE,
166 };
167
168 static struct timer_list ns_timer;
169 static char *mac[NS_MAX_CARDS];
170 module_param_array(mac, charp, NULL, 0);
171 MODULE_LICENSE("GPL");
172
173 /* Functions */
174
175 static int nicstar_init_one(struct pci_dev *pcidev,
176 const struct pci_device_id *ent)
177 {
178 static int index = -1;
179 unsigned int error;
180
181 index++;
182 cards[index] = NULL;
183
184 error = ns_init_card(index, pcidev);
185 if (error) {
186 cards[index--] = NULL; /* don't increment index */
187 goto err_out;
188 }
189
190 return 0;
191 err_out:
192 return -ENODEV;
193 }
194
195 static void nicstar_remove_one(struct pci_dev *pcidev)
196 {
197 int i, j;
198 ns_dev *card = pci_get_drvdata(pcidev);
199 struct sk_buff *hb;
200 struct sk_buff *iovb;
201 struct sk_buff *lb;
202 struct sk_buff *sb;
203
204 i = card->index;
205
206 if (cards[i] == NULL)
207 return;
208
209 if (card->atmdev->phy && card->atmdev->phy->stop)
210 card->atmdev->phy->stop(card->atmdev);
211
212 /* Stop everything */
213 writel(0x00000000, card->membase + CFG);
214
215 /* De-register device */
216 atm_dev_deregister(card->atmdev);
217
218 /* Disable PCI device */
219 pci_disable_device(pcidev);
220
221 /* Free up resources */
222 j = 0;
223 PRINTK("nicstar%d: freeing %d huge buffers.\n", i, card->hbpool.count);
224 while ((hb = skb_dequeue(&card->hbpool.queue)) != NULL) {
225 dev_kfree_skb_any(hb);
226 j++;
227 }
228 PRINTK("nicstar%d: %d huge buffers freed.\n", i, j);
229 j = 0;
230 PRINTK("nicstar%d: freeing %d iovec buffers.\n", i,
231 card->iovpool.count);
232 while ((iovb = skb_dequeue(&card->iovpool.queue)) != NULL) {
233 dev_kfree_skb_any(iovb);
234 j++;
235 }
236 PRINTK("nicstar%d: %d iovec buffers freed.\n", i, j);
237 while ((lb = skb_dequeue(&card->lbpool.queue)) != NULL)
238 dev_kfree_skb_any(lb);
239 while ((sb = skb_dequeue(&card->sbpool.queue)) != NULL)
240 dev_kfree_skb_any(sb);
241 free_scq(card, card->scq0, NULL);
242 for (j = 0; j < NS_FRSCD_NUM; j++) {
243 if (card->scd2vc[j] != NULL)
244 free_scq(card, card->scd2vc[j]->scq, card->scd2vc[j]->tx_vcc);
245 }
246 idr_destroy(&card->idr);
247 dma_free_coherent(&card->pcidev->dev, NS_RSQSIZE + NS_RSQ_ALIGNMENT,
248 card->rsq.org, card->rsq.dma);
249 dma_free_coherent(&card->pcidev->dev, NS_TSQSIZE + NS_TSQ_ALIGNMENT,
250 card->tsq.org, card->tsq.dma);
251 free_irq(card->pcidev->irq, card);
252 iounmap(card->membase);
253 kfree(card);
254 }
255
256 static struct pci_device_id nicstar_pci_tbl[] = {
257 { PCI_VDEVICE(IDT, PCI_DEVICE_ID_IDT_IDT77201), 0 },
258 {0,} /* terminate list */
259 };
260
261 MODULE_DEVICE_TABLE(pci, nicstar_pci_tbl);
262
263 static struct pci_driver nicstar_driver = {
264 .name = "nicstar",
265 .id_table = nicstar_pci_tbl,
266 .probe = nicstar_init_one,
267 .remove = nicstar_remove_one,
268 };
269
270 static int __init nicstar_init(void)
271 {
272 unsigned error = 0; /* Initialized to remove compile warning */
273
274 XPRINTK("nicstar: nicstar_init() called.\n");
275
276 error = pci_register_driver(&nicstar_driver);
277
278 TXPRINTK("nicstar: TX debug enabled.\n");
279 RXPRINTK("nicstar: RX debug enabled.\n");
280 PRINTK("nicstar: General debug enabled.\n");
281 #ifdef PHY_LOOPBACK
282 printk("nicstar: using PHY loopback.\n");
283 #endif /* PHY_LOOPBACK */
284 XPRINTK("nicstar: nicstar_init() returned.\n");
285
286 if (!error) {
287 init_timer(&ns_timer);
288 ns_timer.expires = jiffies + NS_POLL_PERIOD;
289 ns_timer.data = 0UL;
290 ns_timer.function = ns_poll;
291 add_timer(&ns_timer);
292 }
293
294 return error;
295 }
296
297 static void __exit nicstar_cleanup(void)
298 {
299 XPRINTK("nicstar: nicstar_cleanup() called.\n");
300
301 del_timer(&ns_timer);
302
303 pci_unregister_driver(&nicstar_driver);
304
305 XPRINTK("nicstar: nicstar_cleanup() returned.\n");
306 }
307
308 static u32 ns_read_sram(ns_dev * card, u32 sram_address)
309 {
310 unsigned long flags;
311 u32 data;
312 sram_address <<= 2;
313 sram_address &= 0x0007FFFC; /* address must be dword aligned */
314 sram_address |= 0x50000000; /* SRAM read command */
315 spin_lock_irqsave(&card->res_lock, flags);
316 while (CMD_BUSY(card)) ;
317 writel(sram_address, card->membase + CMD);
318 while (CMD_BUSY(card)) ;
319 data = readl(card->membase + DR0);
320 spin_unlock_irqrestore(&card->res_lock, flags);
321 return data;
322 }
323
324 static void ns_write_sram(ns_dev * card, u32 sram_address, u32 * value,
325 int count)
326 {
327 unsigned long flags;
328 int i, c;
329 count--; /* count range now is 0..3 instead of 1..4 */
330 c = count;
331 c <<= 2; /* to use increments of 4 */
332 spin_lock_irqsave(&card->res_lock, flags);
333 while (CMD_BUSY(card)) ;
334 for (i = 0; i <= c; i += 4)
335 writel(*(value++), card->membase + i);
336 /* Note: DR# registers are the first 4 dwords in nicstar's memspace,
337 so card->membase + DR0 == card->membase */
338 sram_address <<= 2;
339 sram_address &= 0x0007FFFC;
340 sram_address |= (0x40000000 | count);
341 writel(sram_address, card->membase + CMD);
342 spin_unlock_irqrestore(&card->res_lock, flags);
343 }
344
345 static int ns_init_card(int i, struct pci_dev *pcidev)
346 {
347 int j;
348 struct ns_dev *card = NULL;
349 unsigned char pci_latency;
350 unsigned error;
351 u32 data;
352 u32 u32d[4];
353 u32 ns_cfg_rctsize;
354 int bcount;
355 unsigned long membase;
356
357 error = 0;
358
359 if (pci_enable_device(pcidev)) {
360 printk("nicstar%d: can't enable PCI device\n", i);
361 error = 2;
362 ns_init_card_error(card, error);
363 return error;
364 }
365 if (dma_set_mask_and_coherent(&pcidev->dev, DMA_BIT_MASK(32)) != 0) {
366 printk(KERN_WARNING
367 "nicstar%d: No suitable DMA available.\n", i);
368 error = 2;
369 ns_init_card_error(card, error);
370 return error;
371 }
372
373 if ((card = kmalloc(sizeof(ns_dev), GFP_KERNEL)) == NULL) {
374 printk
375 ("nicstar%d: can't allocate memory for device structure.\n",
376 i);
377 error = 2;
378 ns_init_card_error(card, error);
379 return error;
380 }
381 cards[i] = card;
382 spin_lock_init(&card->int_lock);
383 spin_lock_init(&card->res_lock);
384
385 pci_set_drvdata(pcidev, card);
386
387 card->index = i;
388 card->atmdev = NULL;
389 card->pcidev = pcidev;
390 membase = pci_resource_start(pcidev, 1);
391 card->membase = ioremap(membase, NS_IOREMAP_SIZE);
392 if (!card->membase) {
393 printk("nicstar%d: can't ioremap() membase.\n", i);
394 error = 3;
395 ns_init_card_error(card, error);
396 return error;
397 }
398 PRINTK("nicstar%d: membase at 0x%p.\n", i, card->membase);
399
400 pci_set_master(pcidev);
401
402 if (pci_read_config_byte(pcidev, PCI_LATENCY_TIMER, &pci_latency) != 0) {
403 printk("nicstar%d: can't read PCI latency timer.\n", i);
404 error = 6;
405 ns_init_card_error(card, error);
406 return error;
407 }
408 #ifdef NS_PCI_LATENCY
409 if (pci_latency < NS_PCI_LATENCY) {
410 PRINTK("nicstar%d: setting PCI latency timer to %d.\n", i,
411 NS_PCI_LATENCY);
412 for (j = 1; j < 4; j++) {
413 if (pci_write_config_byte
414 (pcidev, PCI_LATENCY_TIMER, NS_PCI_LATENCY) != 0)
415 break;
416 }
417 if (j == 4) {
418 printk
419 ("nicstar%d: can't set PCI latency timer to %d.\n",
420 i, NS_PCI_LATENCY);
421 error = 7;
422 ns_init_card_error(card, error);
423 return error;
424 }
425 }
426 #endif /* NS_PCI_LATENCY */
427
428 /* Clear timer overflow */
429 data = readl(card->membase + STAT);
430 if (data & NS_STAT_TMROF)
431 writel(NS_STAT_TMROF, card->membase + STAT);
432
433 /* Software reset */
434 writel(NS_CFG_SWRST, card->membase + CFG);
435 NS_DELAY;
436 writel(0x00000000, card->membase + CFG);
437
438 /* PHY reset */
439 writel(0x00000008, card->membase + GP);
440 NS_DELAY;
441 writel(0x00000001, card->membase + GP);
442 NS_DELAY;
443 while (CMD_BUSY(card)) ;
444 writel(NS_CMD_WRITE_UTILITY | 0x00000100, card->membase + CMD); /* Sync UTOPIA with SAR clock */
445 NS_DELAY;
446
447 /* Detect PHY type */
448 while (CMD_BUSY(card)) ;
449 writel(NS_CMD_READ_UTILITY | 0x00000200, card->membase + CMD);
450 while (CMD_BUSY(card)) ;
451 data = readl(card->membase + DR0);
452 switch (data) {
453 case 0x00000009:
454 printk("nicstar%d: PHY seems to be 25 Mbps.\n", i);
455 card->max_pcr = ATM_25_PCR;
456 while (CMD_BUSY(card)) ;
457 writel(0x00000008, card->membase + DR0);
458 writel(NS_CMD_WRITE_UTILITY | 0x00000200, card->membase + CMD);
459 /* Clear an eventual pending interrupt */
460 writel(NS_STAT_SFBQF, card->membase + STAT);
461 #ifdef PHY_LOOPBACK
462 while (CMD_BUSY(card)) ;
463 writel(0x00000022, card->membase + DR0);
464 writel(NS_CMD_WRITE_UTILITY | 0x00000202, card->membase + CMD);
465 #endif /* PHY_LOOPBACK */
466 break;
467 case 0x00000030:
468 case 0x00000031:
469 printk("nicstar%d: PHY seems to be 155 Mbps.\n", i);
470 card->max_pcr = ATM_OC3_PCR;
471 #ifdef PHY_LOOPBACK
472 while (CMD_BUSY(card)) ;
473 writel(0x00000002, card->membase + DR0);
474 writel(NS_CMD_WRITE_UTILITY | 0x00000205, card->membase + CMD);
475 #endif /* PHY_LOOPBACK */
476 break;
477 default:
478 printk("nicstar%d: unknown PHY type (0x%08X).\n", i, data);
479 error = 8;
480 ns_init_card_error(card, error);
481 return error;
482 }
483 writel(0x00000000, card->membase + GP);
484
485 /* Determine SRAM size */
486 data = 0x76543210;
487 ns_write_sram(card, 0x1C003, &data, 1);
488 data = 0x89ABCDEF;
489 ns_write_sram(card, 0x14003, &data, 1);
490 if (ns_read_sram(card, 0x14003) == 0x89ABCDEF &&
491 ns_read_sram(card, 0x1C003) == 0x76543210)
492 card->sram_size = 128;
493 else
494 card->sram_size = 32;
495 PRINTK("nicstar%d: %dK x 32bit SRAM size.\n", i, card->sram_size);
496
497 card->rct_size = NS_MAX_RCTSIZE;
498
499 #if (NS_MAX_RCTSIZE == 4096)
500 if (card->sram_size == 128)
501 printk
502 ("nicstar%d: limiting maximum VCI. See NS_MAX_RCTSIZE in nicstar.h\n",
503 i);
504 #elif (NS_MAX_RCTSIZE == 16384)
505 if (card->sram_size == 32) {
506 printk
507 ("nicstar%d: wasting memory. See NS_MAX_RCTSIZE in nicstar.h\n",
508 i);
509 card->rct_size = 4096;
510 }
511 #else
512 #error NS_MAX_RCTSIZE must be either 4096 or 16384 in nicstar.c
513 #endif
514
515 card->vpibits = NS_VPIBITS;
516 if (card->rct_size == 4096)
517 card->vcibits = 12 - NS_VPIBITS;
518 else /* card->rct_size == 16384 */
519 card->vcibits = 14 - NS_VPIBITS;
520
521 /* Initialize the nicstar eeprom/eprom stuff, for the MAC addr */
522 if (mac[i] == NULL)
523 nicstar_init_eprom(card->membase);
524
525 /* Set the VPI/VCI MSb mask to zero so we can receive OAM cells */
526 writel(0x00000000, card->membase + VPM);
527
528 /* Initialize TSQ */
529 card->tsq.org = dma_alloc_coherent(&card->pcidev->dev,
530 NS_TSQSIZE + NS_TSQ_ALIGNMENT,
531 &card->tsq.dma, GFP_KERNEL);
532 if (card->tsq.org == NULL) {
533 printk("nicstar%d: can't allocate TSQ.\n", i);
534 error = 10;
535 ns_init_card_error(card, error);
536 return error;
537 }
538 card->tsq.base = PTR_ALIGN(card->tsq.org, NS_TSQ_ALIGNMENT);
539 card->tsq.next = card->tsq.base;
540 card->tsq.last = card->tsq.base + (NS_TSQ_NUM_ENTRIES - 1);
541 for (j = 0; j < NS_TSQ_NUM_ENTRIES; j++)
542 ns_tsi_init(card->tsq.base + j);
543 writel(0x00000000, card->membase + TSQH);
544 writel(ALIGN(card->tsq.dma, NS_TSQ_ALIGNMENT), card->membase + TSQB);
545 PRINTK("nicstar%d: TSQ base at 0x%p.\n", i, card->tsq.base);
546
547 /* Initialize RSQ */
548 card->rsq.org = dma_alloc_coherent(&card->pcidev->dev,
549 NS_RSQSIZE + NS_RSQ_ALIGNMENT,
550 &card->rsq.dma, GFP_KERNEL);
551 if (card->rsq.org == NULL) {
552 printk("nicstar%d: can't allocate RSQ.\n", i);
553 error = 11;
554 ns_init_card_error(card, error);
555 return error;
556 }
557 card->rsq.base = PTR_ALIGN(card->rsq.org, NS_RSQ_ALIGNMENT);
558 card->rsq.next = card->rsq.base;
559 card->rsq.last = card->rsq.base + (NS_RSQ_NUM_ENTRIES - 1);
560 for (j = 0; j < NS_RSQ_NUM_ENTRIES; j++)
561 ns_rsqe_init(card->rsq.base + j);
562 writel(0x00000000, card->membase + RSQH);
563 writel(ALIGN(card->rsq.dma, NS_RSQ_ALIGNMENT), card->membase + RSQB);
564 PRINTK("nicstar%d: RSQ base at 0x%p.\n", i, card->rsq.base);
565
566 /* Initialize SCQ0, the only VBR SCQ used */
567 card->scq1 = NULL;
568 card->scq2 = NULL;
569 card->scq0 = get_scq(card, VBR_SCQSIZE, NS_VRSCD0);
570 if (card->scq0 == NULL) {
571 printk("nicstar%d: can't get SCQ0.\n", i);
572 error = 12;
573 ns_init_card_error(card, error);
574 return error;
575 }
576 u32d[0] = scq_virt_to_bus(card->scq0, card->scq0->base);
577 u32d[1] = (u32) 0x00000000;
578 u32d[2] = (u32) 0xffffffff;
579 u32d[3] = (u32) 0x00000000;
580 ns_write_sram(card, NS_VRSCD0, u32d, 4);
581 ns_write_sram(card, NS_VRSCD1, u32d, 4); /* These last two won't be used */
582 ns_write_sram(card, NS_VRSCD2, u32d, 4); /* but are initialized, just in case... */
583 card->scq0->scd = NS_VRSCD0;
584 PRINTK("nicstar%d: VBR-SCQ0 base at 0x%p.\n", i, card->scq0->base);
585
586 /* Initialize TSTs */
587 card->tst_addr = NS_TST0;
588 card->tst_free_entries = NS_TST_NUM_ENTRIES;
589 data = NS_TST_OPCODE_VARIABLE;
590 for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
591 ns_write_sram(card, NS_TST0 + j, &data, 1);
592 data = ns_tste_make(NS_TST_OPCODE_END, NS_TST0);
593 ns_write_sram(card, NS_TST0 + NS_TST_NUM_ENTRIES, &data, 1);
594 for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
595 ns_write_sram(card, NS_TST1 + j, &data, 1);
596 data = ns_tste_make(NS_TST_OPCODE_END, NS_TST1);
597 ns_write_sram(card, NS_TST1 + NS_TST_NUM_ENTRIES, &data, 1);
598 for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
599 card->tste2vc[j] = NULL;
600 writel(NS_TST0 << 2, card->membase + TSTB);
601
602 /* Initialize RCT. AAL type is set on opening the VC. */
603 #ifdef RCQ_SUPPORT
604 u32d[0] = NS_RCTE_RAWCELLINTEN;
605 #else
606 u32d[0] = 0x00000000;
607 #endif /* RCQ_SUPPORT */
608 u32d[1] = 0x00000000;
609 u32d[2] = 0x00000000;
610 u32d[3] = 0xFFFFFFFF;
611 for (j = 0; j < card->rct_size; j++)
612 ns_write_sram(card, j * 4, u32d, 4);
613
614 memset(card->vcmap, 0, NS_MAX_RCTSIZE * sizeof(vc_map));
615
616 for (j = 0; j < NS_FRSCD_NUM; j++)
617 card->scd2vc[j] = NULL;
618
619 /* Initialize buffer levels */
620 card->sbnr.min = MIN_SB;
621 card->sbnr.init = NUM_SB;
622 card->sbnr.max = MAX_SB;
623 card->lbnr.min = MIN_LB;
624 card->lbnr.init = NUM_LB;
625 card->lbnr.max = MAX_LB;
626 card->iovnr.min = MIN_IOVB;
627 card->iovnr.init = NUM_IOVB;
628 card->iovnr.max = MAX_IOVB;
629 card->hbnr.min = MIN_HB;
630 card->hbnr.init = NUM_HB;
631 card->hbnr.max = MAX_HB;
632
633 card->sm_handle = NULL;
634 card->sm_addr = 0x00000000;
635 card->lg_handle = NULL;
636 card->lg_addr = 0x00000000;
637
638 card->efbie = 1; /* To prevent push_rxbufs from enabling the interrupt */
639
640 idr_init(&card->idr);
641
642 /* Pre-allocate some huge buffers */
643 skb_queue_head_init(&card->hbpool.queue);
644 card->hbpool.count = 0;
645 for (j = 0; j < NUM_HB; j++) {
646 struct sk_buff *hb;
647 hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
648 if (hb == NULL) {
649 printk
650 ("nicstar%d: can't allocate %dth of %d huge buffers.\n",
651 i, j, NUM_HB);
652 error = 13;
653 ns_init_card_error(card, error);
654 return error;
655 }
656 NS_PRV_BUFTYPE(hb) = BUF_NONE;
657 skb_queue_tail(&card->hbpool.queue, hb);
658 card->hbpool.count++;
659 }
660
661 /* Allocate large buffers */
662 skb_queue_head_init(&card->lbpool.queue);
663 card->lbpool.count = 0; /* Not used */
664 for (j = 0; j < NUM_LB; j++) {
665 struct sk_buff *lb;
666 lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
667 if (lb == NULL) {
668 printk
669 ("nicstar%d: can't allocate %dth of %d large buffers.\n",
670 i, j, NUM_LB);
671 error = 14;
672 ns_init_card_error(card, error);
673 return error;
674 }
675 NS_PRV_BUFTYPE(lb) = BUF_LG;
676 skb_queue_tail(&card->lbpool.queue, lb);
677 skb_reserve(lb, NS_SMBUFSIZE);
678 push_rxbufs(card, lb);
679 /* Due to the implementation of push_rxbufs() this is 1, not 0 */
680 if (j == 1) {
681 card->rcbuf = lb;
682 card->rawcell = (struct ns_rcqe *) lb->data;
683 card->rawch = NS_PRV_DMA(lb);
684 }
685 }
686 /* Test for strange behaviour which leads to crashes */
687 if ((bcount =
688 ns_stat_lfbqc_get(readl(card->membase + STAT))) < card->lbnr.min) {
689 printk
690 ("nicstar%d: Strange... Just allocated %d large buffers and lfbqc = %d.\n",
691 i, j, bcount);
692 error = 14;
693 ns_init_card_error(card, error);
694 return error;
695 }
696
697 /* Allocate small buffers */
698 skb_queue_head_init(&card->sbpool.queue);
699 card->sbpool.count = 0; /* Not used */
700 for (j = 0; j < NUM_SB; j++) {
701 struct sk_buff *sb;
702 sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
703 if (sb == NULL) {
704 printk
705 ("nicstar%d: can't allocate %dth of %d small buffers.\n",
706 i, j, NUM_SB);
707 error = 15;
708 ns_init_card_error(card, error);
709 return error;
710 }
711 NS_PRV_BUFTYPE(sb) = BUF_SM;
712 skb_queue_tail(&card->sbpool.queue, sb);
713 skb_reserve(sb, NS_AAL0_HEADER);
714 push_rxbufs(card, sb);
715 }
716 /* Test for strange behaviour which leads to crashes */
717 if ((bcount =
718 ns_stat_sfbqc_get(readl(card->membase + STAT))) < card->sbnr.min) {
719 printk
720 ("nicstar%d: Strange... Just allocated %d small buffers and sfbqc = %d.\n",
721 i, j, bcount);
722 error = 15;
723 ns_init_card_error(card, error);
724 return error;
725 }
726
727 /* Allocate iovec buffers */
728 skb_queue_head_init(&card->iovpool.queue);
729 card->iovpool.count = 0;
730 for (j = 0; j < NUM_IOVB; j++) {
731 struct sk_buff *iovb;
732 iovb = alloc_skb(NS_IOVBUFSIZE, GFP_KERNEL);
733 if (iovb == NULL) {
734 printk
735 ("nicstar%d: can't allocate %dth of %d iovec buffers.\n",
736 i, j, NUM_IOVB);
737 error = 16;
738 ns_init_card_error(card, error);
739 return error;
740 }
741 NS_PRV_BUFTYPE(iovb) = BUF_NONE;
742 skb_queue_tail(&card->iovpool.queue, iovb);
743 card->iovpool.count++;
744 }
745
746 /* Configure NICStAR */
747 if (card->rct_size == 4096)
748 ns_cfg_rctsize = NS_CFG_RCTSIZE_4096_ENTRIES;
749 else /* (card->rct_size == 16384) */
750 ns_cfg_rctsize = NS_CFG_RCTSIZE_16384_ENTRIES;
751
752 card->efbie = 1;
753
754 card->intcnt = 0;
755 if (request_irq
756 (pcidev->irq, &ns_irq_handler, IRQF_SHARED, "nicstar", card) != 0) {
757 printk("nicstar%d: can't allocate IRQ %d.\n", i, pcidev->irq);
758 error = 9;
759 ns_init_card_error(card, error);
760 return error;
761 }
762
763 /* Register device */
764 card->atmdev = atm_dev_register("nicstar", &card->pcidev->dev, &atm_ops,
765 -1, NULL);
766 if (card->atmdev == NULL) {
767 printk("nicstar%d: can't register device.\n", i);
768 error = 17;
769 ns_init_card_error(card, error);
770 return error;
771 }
772
773 if (mac[i] == NULL || !mac_pton(mac[i], card->atmdev->esi)) {
774 nicstar_read_eprom(card->membase, NICSTAR_EPROM_MAC_ADDR_OFFSET,
775 card->atmdev->esi, 6);
776 if (ether_addr_equal(card->atmdev->esi, "\x00\x00\x00\x00\x00\x00")) {
777 nicstar_read_eprom(card->membase,
778 NICSTAR_EPROM_MAC_ADDR_OFFSET_ALT,
779 card->atmdev->esi, 6);
780 }
781 }
782
783 printk("nicstar%d: MAC address %pM\n", i, card->atmdev->esi);
784
785 card->atmdev->dev_data = card;
786 card->atmdev->ci_range.vpi_bits = card->vpibits;
787 card->atmdev->ci_range.vci_bits = card->vcibits;
788 card->atmdev->link_rate = card->max_pcr;
789 card->atmdev->phy = NULL;
790
791 #ifdef CONFIG_ATM_NICSTAR_USE_SUNI
792 if (card->max_pcr == ATM_OC3_PCR)
793 suni_init(card->atmdev);
794 #endif /* CONFIG_ATM_NICSTAR_USE_SUNI */
795
796 #ifdef CONFIG_ATM_NICSTAR_USE_IDT77105
797 if (card->max_pcr == ATM_25_PCR)
798 idt77105_init(card->atmdev);
799 #endif /* CONFIG_ATM_NICSTAR_USE_IDT77105 */
800
801 if (card->atmdev->phy && card->atmdev->phy->start)
802 card->atmdev->phy->start(card->atmdev);
803
804 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 */
805 NS_CFG_RSQAFIE | NS_CFG_TXEN | NS_CFG_TXIE | NS_CFG_TSQFIE_OPT | /* Only enabled if ENABLE_TSQFIE */
806 NS_CFG_PHYIE, card->membase + CFG);
807
808 num_cards++;
809
810 return error;
811 }
812
813 static void ns_init_card_error(ns_dev *card, int error)
814 {
815 if (error >= 17) {
816 writel(0x00000000, card->membase + CFG);
817 }
818 if (error >= 16) {
819 struct sk_buff *iovb;
820 while ((iovb = skb_dequeue(&card->iovpool.queue)) != NULL)
821 dev_kfree_skb_any(iovb);
822 }
823 if (error >= 15) {
824 struct sk_buff *sb;
825 while ((sb = skb_dequeue(&card->sbpool.queue)) != NULL)
826 dev_kfree_skb_any(sb);
827 free_scq(card, card->scq0, NULL);
828 }
829 if (error >= 14) {
830 struct sk_buff *lb;
831 while ((lb = skb_dequeue(&card->lbpool.queue)) != NULL)
832 dev_kfree_skb_any(lb);
833 }
834 if (error >= 13) {
835 struct sk_buff *hb;
836 while ((hb = skb_dequeue(&card->hbpool.queue)) != NULL)
837 dev_kfree_skb_any(hb);
838 }
839 if (error >= 12) {
840 kfree(card->rsq.org);
841 }
842 if (error >= 11) {
843 kfree(card->tsq.org);
844 }
845 if (error >= 10) {
846 free_irq(card->pcidev->irq, card);
847 }
848 if (error >= 4) {
849 iounmap(card->membase);
850 }
851 if (error >= 3) {
852 pci_disable_device(card->pcidev);
853 kfree(card);
854 }
855 }
856
857 static scq_info *get_scq(ns_dev *card, int size, u32 scd)
858 {
859 scq_info *scq;
860 int i;
861
862 if (size != VBR_SCQSIZE && size != CBR_SCQSIZE)
863 return NULL;
864
865 scq = kmalloc(sizeof(scq_info), GFP_KERNEL);
866 if (!scq)
867 return NULL;
868 scq->org = dma_alloc_coherent(&card->pcidev->dev,
869 2 * size, &scq->dma, GFP_KERNEL);
870 if (!scq->org) {
871 kfree(scq);
872 return NULL;
873 }
874 scq->skb = kmalloc(sizeof(struct sk_buff *) *
875 (size / NS_SCQE_SIZE), GFP_KERNEL);
876 if (!scq->skb) {
877 kfree(scq->org);
878 kfree(scq);
879 return NULL;
880 }
881 scq->num_entries = size / NS_SCQE_SIZE;
882 scq->base = PTR_ALIGN(scq->org, size);
883 scq->next = scq->base;
884 scq->last = scq->base + (scq->num_entries - 1);
885 scq->tail = scq->last;
886 scq->scd = scd;
887 scq->num_entries = size / NS_SCQE_SIZE;
888 scq->tbd_count = 0;
889 init_waitqueue_head(&scq->scqfull_waitq);
890 scq->full = 0;
891 spin_lock_init(&scq->lock);
892
893 for (i = 0; i < scq->num_entries; i++)
894 scq->skb[i] = NULL;
895
896 return scq;
897 }
898
899 /* For variable rate SCQ vcc must be NULL */
900 static void free_scq(ns_dev *card, scq_info *scq, struct atm_vcc *vcc)
901 {
902 int i;
903
904 if (scq->num_entries == VBR_SCQ_NUM_ENTRIES)
905 for (i = 0; i < scq->num_entries; i++) {
906 if (scq->skb[i] != NULL) {
907 vcc = ATM_SKB(scq->skb[i])->vcc;
908 if (vcc->pop != NULL)
909 vcc->pop(vcc, scq->skb[i]);
910 else
911 dev_kfree_skb_any(scq->skb[i]);
912 }
913 } else { /* vcc must be != NULL */
914
915 if (vcc == NULL) {
916 printk
917 ("nicstar: free_scq() called with vcc == NULL for fixed rate scq.");
918 for (i = 0; i < scq->num_entries; i++)
919 dev_kfree_skb_any(scq->skb[i]);
920 } else
921 for (i = 0; i < scq->num_entries; i++) {
922 if (scq->skb[i] != NULL) {
923 if (vcc->pop != NULL)
924 vcc->pop(vcc, scq->skb[i]);
925 else
926 dev_kfree_skb_any(scq->skb[i]);
927 }
928 }
929 }
930 kfree(scq->skb);
931 dma_free_coherent(&card->pcidev->dev,
932 2 * (scq->num_entries == VBR_SCQ_NUM_ENTRIES ?
933 VBR_SCQSIZE : CBR_SCQSIZE),
934 scq->org, scq->dma);
935 kfree(scq);
936 }
937
938 /* The handles passed must be pointers to the sk_buff containing the small
939 or large buffer(s) cast to u32. */
940 static void push_rxbufs(ns_dev * card, struct sk_buff *skb)
941 {
942 struct sk_buff *handle1, *handle2;
943 int id1, id2;
944 u32 addr1, addr2;
945 u32 stat;
946 unsigned long flags;
947
948 /* *BARF* */
949 handle2 = NULL;
950 addr2 = 0;
951 handle1 = skb;
952 addr1 = dma_map_single(&card->pcidev->dev,
953 skb->data,
954 (NS_PRV_BUFTYPE(skb) == BUF_SM
955 ? NS_SMSKBSIZE : NS_LGSKBSIZE),
956 DMA_TO_DEVICE);
957 NS_PRV_DMA(skb) = addr1; /* save so we can unmap later */
958
959 #ifdef GENERAL_DEBUG
960 if (!addr1)
961 printk("nicstar%d: push_rxbufs called with addr1 = 0.\n",
962 card->index);
963 #endif /* GENERAL_DEBUG */
964
965 stat = readl(card->membase + STAT);
966 card->sbfqc = ns_stat_sfbqc_get(stat);
967 card->lbfqc = ns_stat_lfbqc_get(stat);
968 if (NS_PRV_BUFTYPE(skb) == BUF_SM) {
969 if (!addr2) {
970 if (card->sm_addr) {
971 addr2 = card->sm_addr;
972 handle2 = card->sm_handle;
973 card->sm_addr = 0x00000000;
974 card->sm_handle = NULL;
975 } else { /* (!sm_addr) */
976
977 card->sm_addr = addr1;
978 card->sm_handle = handle1;
979 }
980 }
981 } else { /* buf_type == BUF_LG */
982
983 if (!addr2) {
984 if (card->lg_addr) {
985 addr2 = card->lg_addr;
986 handle2 = card->lg_handle;
987 card->lg_addr = 0x00000000;
988 card->lg_handle = NULL;
989 } else { /* (!lg_addr) */
990
991 card->lg_addr = addr1;
992 card->lg_handle = handle1;
993 }
994 }
995 }
996
997 if (addr2) {
998 if (NS_PRV_BUFTYPE(skb) == BUF_SM) {
999 if (card->sbfqc >= card->sbnr.max) {
1000 skb_unlink(handle1, &card->sbpool.queue);
1001 dev_kfree_skb_any(handle1);
1002 skb_unlink(handle2, &card->sbpool.queue);
1003 dev_kfree_skb_any(handle2);
1004 return;
1005 } else
1006 card->sbfqc += 2;
1007 } else { /* (buf_type == BUF_LG) */
1008
1009 if (card->lbfqc >= card->lbnr.max) {
1010 skb_unlink(handle1, &card->lbpool.queue);
1011 dev_kfree_skb_any(handle1);
1012 skb_unlink(handle2, &card->lbpool.queue);
1013 dev_kfree_skb_any(handle2);
1014 return;
1015 } else
1016 card->lbfqc += 2;
1017 }
1018
1019 id1 = idr_alloc(&card->idr, handle1, 0, 0, GFP_ATOMIC);
1020 if (id1 < 0)
1021 goto out;
1022
1023 id2 = idr_alloc(&card->idr, handle2, 0, 0, GFP_ATOMIC);
1024 if (id2 < 0)
1025 goto out;
1026
1027 spin_lock_irqsave(&card->res_lock, flags);
1028 while (CMD_BUSY(card)) ;
1029 writel(addr2, card->membase + DR3);
1030 writel(id2, card->membase + DR2);
1031 writel(addr1, card->membase + DR1);
1032 writel(id1, card->membase + DR0);
1033 writel(NS_CMD_WRITE_FREEBUFQ | NS_PRV_BUFTYPE(skb),
1034 card->membase + CMD);
1035 spin_unlock_irqrestore(&card->res_lock, flags);
1036
1037 XPRINTK("nicstar%d: Pushing %s buffers at 0x%x and 0x%x.\n",
1038 card->index,
1039 (NS_PRV_BUFTYPE(skb) == BUF_SM ? "small" : "large"),
1040 addr1, addr2);
1041 }
1042
1043 if (!card->efbie && card->sbfqc >= card->sbnr.min &&
1044 card->lbfqc >= card->lbnr.min) {
1045 card->efbie = 1;
1046 writel((readl(card->membase + CFG) | NS_CFG_EFBIE),
1047 card->membase + CFG);
1048 }
1049
1050 out:
1051 return;
1052 }
1053
1054 static irqreturn_t ns_irq_handler(int irq, void *dev_id)
1055 {
1056 u32 stat_r;
1057 ns_dev *card;
1058 struct atm_dev *dev;
1059 unsigned long flags;
1060
1061 card = (ns_dev *) dev_id;
1062 dev = card->atmdev;
1063 card->intcnt++;
1064
1065 PRINTK("nicstar%d: NICStAR generated an interrupt\n", card->index);
1066
1067 spin_lock_irqsave(&card->int_lock, flags);
1068
1069 stat_r = readl(card->membase + STAT);
1070
1071 /* Transmit Status Indicator has been written to T. S. Queue */
1072 if (stat_r & NS_STAT_TSIF) {
1073 TXPRINTK("nicstar%d: TSI interrupt\n", card->index);
1074 process_tsq(card);
1075 writel(NS_STAT_TSIF, card->membase + STAT);
1076 }
1077
1078 /* Incomplete CS-PDU has been transmitted */
1079 if (stat_r & NS_STAT_TXICP) {
1080 writel(NS_STAT_TXICP, card->membase + STAT);
1081 TXPRINTK("nicstar%d: Incomplete CS-PDU transmitted.\n",
1082 card->index);
1083 }
1084
1085 /* Transmit Status Queue 7/8 full */
1086 if (stat_r & NS_STAT_TSQF) {
1087 writel(NS_STAT_TSQF, card->membase + STAT);
1088 PRINTK("nicstar%d: TSQ full.\n", card->index);
1089 process_tsq(card);
1090 }
1091
1092 /* Timer overflow */
1093 if (stat_r & NS_STAT_TMROF) {
1094 writel(NS_STAT_TMROF, card->membase + STAT);
1095 PRINTK("nicstar%d: Timer overflow.\n", card->index);
1096 }
1097
1098 /* PHY device interrupt signal active */
1099 if (stat_r & NS_STAT_PHYI) {
1100 writel(NS_STAT_PHYI, card->membase + STAT);
1101 PRINTK("nicstar%d: PHY interrupt.\n", card->index);
1102 if (dev->phy && dev->phy->interrupt) {
1103 dev->phy->interrupt(dev);
1104 }
1105 }
1106
1107 /* Small Buffer Queue is full */
1108 if (stat_r & NS_STAT_SFBQF) {
1109 writel(NS_STAT_SFBQF, card->membase + STAT);
1110 printk("nicstar%d: Small free buffer queue is full.\n",
1111 card->index);
1112 }
1113
1114 /* Large Buffer Queue is full */
1115 if (stat_r & NS_STAT_LFBQF) {
1116 writel(NS_STAT_LFBQF, card->membase + STAT);
1117 printk("nicstar%d: Large free buffer queue is full.\n",
1118 card->index);
1119 }
1120
1121 /* Receive Status Queue is full */
1122 if (stat_r & NS_STAT_RSQF) {
1123 writel(NS_STAT_RSQF, card->membase + STAT);
1124 printk("nicstar%d: RSQ full.\n", card->index);
1125 process_rsq(card);
1126 }
1127
1128 /* Complete CS-PDU received */
1129 if (stat_r & NS_STAT_EOPDU) {
1130 RXPRINTK("nicstar%d: End of CS-PDU received.\n", card->index);
1131 process_rsq(card);
1132 writel(NS_STAT_EOPDU, card->membase + STAT);
1133 }
1134
1135 /* Raw cell received */
1136 if (stat_r & NS_STAT_RAWCF) {
1137 writel(NS_STAT_RAWCF, card->membase + STAT);
1138 #ifndef RCQ_SUPPORT
1139 printk("nicstar%d: Raw cell received and no support yet...\n",
1140 card->index);
1141 #endif /* RCQ_SUPPORT */
1142 /* NOTE: the following procedure may keep a raw cell pending until the
1143 next interrupt. As this preliminary support is only meant to
1144 avoid buffer leakage, this is not an issue. */
1145 while (readl(card->membase + RAWCT) != card->rawch) {
1146
1147 if (ns_rcqe_islast(card->rawcell)) {
1148 struct sk_buff *oldbuf;
1149
1150 oldbuf = card->rcbuf;
1151 card->rcbuf = idr_find(&card->idr,
1152 ns_rcqe_nextbufhandle(card->rawcell));
1153 card->rawch = NS_PRV_DMA(card->rcbuf);
1154 card->rawcell = (struct ns_rcqe *)
1155 card->rcbuf->data;
1156 recycle_rx_buf(card, oldbuf);
1157 } else {
1158 card->rawch += NS_RCQE_SIZE;
1159 card->rawcell++;
1160 }
1161 }
1162 }
1163
1164 /* Small buffer queue is empty */
1165 if (stat_r & NS_STAT_SFBQE) {
1166 int i;
1167 struct sk_buff *sb;
1168
1169 writel(NS_STAT_SFBQE, card->membase + STAT);
1170 printk("nicstar%d: Small free buffer queue empty.\n",
1171 card->index);
1172 for (i = 0; i < card->sbnr.min; i++) {
1173 sb = dev_alloc_skb(NS_SMSKBSIZE);
1174 if (sb == NULL) {
1175 writel(readl(card->membase + CFG) &
1176 ~NS_CFG_EFBIE, card->membase + CFG);
1177 card->efbie = 0;
1178 break;
1179 }
1180 NS_PRV_BUFTYPE(sb) = BUF_SM;
1181 skb_queue_tail(&card->sbpool.queue, sb);
1182 skb_reserve(sb, NS_AAL0_HEADER);
1183 push_rxbufs(card, sb);
1184 }
1185 card->sbfqc = i;
1186 process_rsq(card);
1187 }
1188
1189 /* Large buffer queue empty */
1190 if (stat_r & NS_STAT_LFBQE) {
1191 int i;
1192 struct sk_buff *lb;
1193
1194 writel(NS_STAT_LFBQE, card->membase + STAT);
1195 printk("nicstar%d: Large free buffer queue empty.\n",
1196 card->index);
1197 for (i = 0; i < card->lbnr.min; i++) {
1198 lb = dev_alloc_skb(NS_LGSKBSIZE);
1199 if (lb == NULL) {
1200 writel(readl(card->membase + CFG) &
1201 ~NS_CFG_EFBIE, card->membase + CFG);
1202 card->efbie = 0;
1203 break;
1204 }
1205 NS_PRV_BUFTYPE(lb) = BUF_LG;
1206 skb_queue_tail(&card->lbpool.queue, lb);
1207 skb_reserve(lb, NS_SMBUFSIZE);
1208 push_rxbufs(card, lb);
1209 }
1210 card->lbfqc = i;
1211 process_rsq(card);
1212 }
1213
1214 /* Receive Status Queue is 7/8 full */
1215 if (stat_r & NS_STAT_RSQAF) {
1216 writel(NS_STAT_RSQAF, card->membase + STAT);
1217 RXPRINTK("nicstar%d: RSQ almost full.\n", card->index);
1218 process_rsq(card);
1219 }
1220
1221 spin_unlock_irqrestore(&card->int_lock, flags);
1222 PRINTK("nicstar%d: end of interrupt service\n", card->index);
1223 return IRQ_HANDLED;
1224 }
1225
1226 static int ns_open(struct atm_vcc *vcc)
1227 {
1228 ns_dev *card;
1229 vc_map *vc;
1230 unsigned long tmpl, modl;
1231 int tcr, tcra; /* target cell rate, and absolute value */
1232 int n = 0; /* Number of entries in the TST. Initialized to remove
1233 the compiler warning. */
1234 u32 u32d[4];
1235 int frscdi = 0; /* Index of the SCD. Initialized to remove the compiler
1236 warning. How I wish compilers were clever enough to
1237 tell which variables can truly be used
1238 uninitialized... */
1239 int inuse; /* tx or rx vc already in use by another vcc */
1240 short vpi = vcc->vpi;
1241 int vci = vcc->vci;
1242
1243 card = (ns_dev *) vcc->dev->dev_data;
1244 PRINTK("nicstar%d: opening vpi.vci %d.%d \n", card->index, (int)vpi,
1245 vci);
1246 if (vcc->qos.aal != ATM_AAL5 && vcc->qos.aal != ATM_AAL0) {
1247 PRINTK("nicstar%d: unsupported AAL.\n", card->index);
1248 return -EINVAL;
1249 }
1250
1251 vc = &(card->vcmap[vpi << card->vcibits | vci]);
1252 vcc->dev_data = vc;
1253
1254 inuse = 0;
1255 if (vcc->qos.txtp.traffic_class != ATM_NONE && vc->tx)
1256 inuse = 1;
1257 if (vcc->qos.rxtp.traffic_class != ATM_NONE && vc->rx)
1258 inuse += 2;
1259 if (inuse) {
1260 printk("nicstar%d: %s vci already in use.\n", card->index,
1261 inuse == 1 ? "tx" : inuse == 2 ? "rx" : "tx and rx");
1262 return -EINVAL;
1263 }
1264
1265 set_bit(ATM_VF_ADDR, &vcc->flags);
1266
1267 /* NOTE: You are not allowed to modify an open connection's QOS. To change
1268 that, remove the ATM_VF_PARTIAL flag checking. There may be other changes
1269 needed to do that. */
1270 if (!test_bit(ATM_VF_PARTIAL, &vcc->flags)) {
1271 scq_info *scq;
1272
1273 set_bit(ATM_VF_PARTIAL, &vcc->flags);
1274 if (vcc->qos.txtp.traffic_class == ATM_CBR) {
1275 /* Check requested cell rate and availability of SCD */
1276 if (vcc->qos.txtp.max_pcr == 0 && vcc->qos.txtp.pcr == 0
1277 && vcc->qos.txtp.min_pcr == 0) {
1278 PRINTK
1279 ("nicstar%d: trying to open a CBR vc with cell rate = 0 \n",
1280 card->index);
1281 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1282 clear_bit(ATM_VF_ADDR, &vcc->flags);
1283 return -EINVAL;
1284 }
1285
1286 tcr = atm_pcr_goal(&(vcc->qos.txtp));
1287 tcra = tcr >= 0 ? tcr : -tcr;
1288
1289 PRINTK("nicstar%d: target cell rate = %d.\n",
1290 card->index, vcc->qos.txtp.max_pcr);
1291
1292 tmpl =
1293 (unsigned long)tcra *(unsigned long)
1294 NS_TST_NUM_ENTRIES;
1295 modl = tmpl % card->max_pcr;
1296
1297 n = (int)(tmpl / card->max_pcr);
1298 if (tcr > 0) {
1299 if (modl > 0)
1300 n++;
1301 } else if (tcr == 0) {
1302 if ((n =
1303 (card->tst_free_entries -
1304 NS_TST_RESERVED)) <= 0) {
1305 PRINTK
1306 ("nicstar%d: no CBR bandwidth free.\n",
1307 card->index);
1308 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1309 clear_bit(ATM_VF_ADDR, &vcc->flags);
1310 return -EINVAL;
1311 }
1312 }
1313
1314 if (n == 0) {
1315 printk
1316 ("nicstar%d: selected bandwidth < granularity.\n",
1317 card->index);
1318 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1319 clear_bit(ATM_VF_ADDR, &vcc->flags);
1320 return -EINVAL;
1321 }
1322
1323 if (n > (card->tst_free_entries - NS_TST_RESERVED)) {
1324 PRINTK
1325 ("nicstar%d: not enough free CBR bandwidth.\n",
1326 card->index);
1327 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1328 clear_bit(ATM_VF_ADDR, &vcc->flags);
1329 return -EINVAL;
1330 } else
1331 card->tst_free_entries -= n;
1332
1333 XPRINTK("nicstar%d: writing %d tst entries.\n",
1334 card->index, n);
1335 for (frscdi = 0; frscdi < NS_FRSCD_NUM; frscdi++) {
1336 if (card->scd2vc[frscdi] == NULL) {
1337 card->scd2vc[frscdi] = vc;
1338 break;
1339 }
1340 }
1341 if (frscdi == NS_FRSCD_NUM) {
1342 PRINTK
1343 ("nicstar%d: no SCD available for CBR channel.\n",
1344 card->index);
1345 card->tst_free_entries += n;
1346 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1347 clear_bit(ATM_VF_ADDR, &vcc->flags);
1348 return -EBUSY;
1349 }
1350
1351 vc->cbr_scd = NS_FRSCD + frscdi * NS_FRSCD_SIZE;
1352
1353 scq = get_scq(card, CBR_SCQSIZE, vc->cbr_scd);
1354 if (scq == NULL) {
1355 PRINTK("nicstar%d: can't get fixed rate SCQ.\n",
1356 card->index);
1357 card->scd2vc[frscdi] = NULL;
1358 card->tst_free_entries += n;
1359 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1360 clear_bit(ATM_VF_ADDR, &vcc->flags);
1361 return -ENOMEM;
1362 }
1363 vc->scq = scq;
1364 u32d[0] = scq_virt_to_bus(scq, scq->base);
1365 u32d[1] = (u32) 0x00000000;
1366 u32d[2] = (u32) 0xffffffff;
1367 u32d[3] = (u32) 0x00000000;
1368 ns_write_sram(card, vc->cbr_scd, u32d, 4);
1369
1370 fill_tst(card, n, vc);
1371 } else if (vcc->qos.txtp.traffic_class == ATM_UBR) {
1372 vc->cbr_scd = 0x00000000;
1373 vc->scq = card->scq0;
1374 }
1375
1376 if (vcc->qos.txtp.traffic_class != ATM_NONE) {
1377 vc->tx = 1;
1378 vc->tx_vcc = vcc;
1379 vc->tbd_count = 0;
1380 }
1381 if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
1382 u32 status;
1383
1384 vc->rx = 1;
1385 vc->rx_vcc = vcc;
1386 vc->rx_iov = NULL;
1387
1388 /* Open the connection in hardware */
1389 if (vcc->qos.aal == ATM_AAL5)
1390 status = NS_RCTE_AAL5 | NS_RCTE_CONNECTOPEN;
1391 else /* vcc->qos.aal == ATM_AAL0 */
1392 status = NS_RCTE_AAL0 | NS_RCTE_CONNECTOPEN;
1393 #ifdef RCQ_SUPPORT
1394 status |= NS_RCTE_RAWCELLINTEN;
1395 #endif /* RCQ_SUPPORT */
1396 ns_write_sram(card,
1397 NS_RCT +
1398 (vpi << card->vcibits | vci) *
1399 NS_RCT_ENTRY_SIZE, &status, 1);
1400 }
1401
1402 }
1403
1404 set_bit(ATM_VF_READY, &vcc->flags);
1405 return 0;
1406 }
1407
1408 static void ns_close(struct atm_vcc *vcc)
1409 {
1410 vc_map *vc;
1411 ns_dev *card;
1412 u32 data;
1413 int i;
1414
1415 vc = vcc->dev_data;
1416 card = vcc->dev->dev_data;
1417 PRINTK("nicstar%d: closing vpi.vci %d.%d \n", card->index,
1418 (int)vcc->vpi, vcc->vci);
1419
1420 clear_bit(ATM_VF_READY, &vcc->flags);
1421
1422 if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
1423 u32 addr;
1424 unsigned long flags;
1425
1426 addr =
1427 NS_RCT +
1428 (vcc->vpi << card->vcibits | vcc->vci) * NS_RCT_ENTRY_SIZE;
1429 spin_lock_irqsave(&card->res_lock, flags);
1430 while (CMD_BUSY(card)) ;
1431 writel(NS_CMD_CLOSE_CONNECTION | addr << 2,
1432 card->membase + CMD);
1433 spin_unlock_irqrestore(&card->res_lock, flags);
1434
1435 vc->rx = 0;
1436 if (vc->rx_iov != NULL) {
1437 struct sk_buff *iovb;
1438 u32 stat;
1439
1440 stat = readl(card->membase + STAT);
1441 card->sbfqc = ns_stat_sfbqc_get(stat);
1442 card->lbfqc = ns_stat_lfbqc_get(stat);
1443
1444 PRINTK
1445 ("nicstar%d: closing a VC with pending rx buffers.\n",
1446 card->index);
1447 iovb = vc->rx_iov;
1448 recycle_iovec_rx_bufs(card, (struct iovec *)iovb->data,
1449 NS_PRV_IOVCNT(iovb));
1450 NS_PRV_IOVCNT(iovb) = 0;
1451 spin_lock_irqsave(&card->int_lock, flags);
1452 recycle_iov_buf(card, iovb);
1453 spin_unlock_irqrestore(&card->int_lock, flags);
1454 vc->rx_iov = NULL;
1455 }
1456 }
1457
1458 if (vcc->qos.txtp.traffic_class != ATM_NONE) {
1459 vc->tx = 0;
1460 }
1461
1462 if (vcc->qos.txtp.traffic_class == ATM_CBR) {
1463 unsigned long flags;
1464 ns_scqe *scqep;
1465 scq_info *scq;
1466
1467 scq = vc->scq;
1468
1469 for (;;) {
1470 spin_lock_irqsave(&scq->lock, flags);
1471 scqep = scq->next;
1472 if (scqep == scq->base)
1473 scqep = scq->last;
1474 else
1475 scqep--;
1476 if (scqep == scq->tail) {
1477 spin_unlock_irqrestore(&scq->lock, flags);
1478 break;
1479 }
1480 /* If the last entry is not a TSR, place one in the SCQ in order to
1481 be able to completely drain it and then close. */
1482 if (!ns_scqe_is_tsr(scqep) && scq->tail != scq->next) {
1483 ns_scqe tsr;
1484 u32 scdi, scqi;
1485 u32 data;
1486 int index;
1487
1488 tsr.word_1 = ns_tsr_mkword_1(NS_TSR_INTENABLE);
1489 scdi = (vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE;
1490 scqi = scq->next - scq->base;
1491 tsr.word_2 = ns_tsr_mkword_2(scdi, scqi);
1492 tsr.word_3 = 0x00000000;
1493 tsr.word_4 = 0x00000000;
1494 *scq->next = tsr;
1495 index = (int)scqi;
1496 scq->skb[index] = NULL;
1497 if (scq->next == scq->last)
1498 scq->next = scq->base;
1499 else
1500 scq->next++;
1501 data = scq_virt_to_bus(scq, scq->next);
1502 ns_write_sram(card, scq->scd, &data, 1);
1503 }
1504 spin_unlock_irqrestore(&scq->lock, flags);
1505 schedule();
1506 }
1507
1508 /* Free all TST entries */
1509 data = NS_TST_OPCODE_VARIABLE;
1510 for (i = 0; i < NS_TST_NUM_ENTRIES; i++) {
1511 if (card->tste2vc[i] == vc) {
1512 ns_write_sram(card, card->tst_addr + i, &data,
1513 1);
1514 card->tste2vc[i] = NULL;
1515 card->tst_free_entries++;
1516 }
1517 }
1518
1519 card->scd2vc[(vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE] = NULL;
1520 free_scq(card, vc->scq, vcc);
1521 }
1522
1523 /* remove all references to vcc before deleting it */
1524 if (vcc->qos.txtp.traffic_class != ATM_NONE) {
1525 unsigned long flags;
1526 scq_info *scq = card->scq0;
1527
1528 spin_lock_irqsave(&scq->lock, flags);
1529
1530 for (i = 0; i < scq->num_entries; i++) {
1531 if (scq->skb[i] && ATM_SKB(scq->skb[i])->vcc == vcc) {
1532 ATM_SKB(scq->skb[i])->vcc = NULL;
1533 atm_return(vcc, scq->skb[i]->truesize);
1534 PRINTK
1535 ("nicstar: deleted pending vcc mapping\n");
1536 }
1537 }
1538
1539 spin_unlock_irqrestore(&scq->lock, flags);
1540 }
1541
1542 vcc->dev_data = NULL;
1543 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1544 clear_bit(ATM_VF_ADDR, &vcc->flags);
1545
1546 #ifdef RX_DEBUG
1547 {
1548 u32 stat, cfg;
1549 stat = readl(card->membase + STAT);
1550 cfg = readl(card->membase + CFG);
1551 printk("STAT = 0x%08X CFG = 0x%08X \n", stat, cfg);
1552 printk
1553 ("TSQ: base = 0x%p next = 0x%p last = 0x%p TSQT = 0x%08X \n",
1554 card->tsq.base, card->tsq.next,
1555 card->tsq.last, readl(card->membase + TSQT));
1556 printk
1557 ("RSQ: base = 0x%p next = 0x%p last = 0x%p RSQT = 0x%08X \n",
1558 card->rsq.base, card->rsq.next,
1559 card->rsq.last, readl(card->membase + RSQT));
1560 printk("Empty free buffer queue interrupt %s \n",
1561 card->efbie ? "enabled" : "disabled");
1562 printk("SBCNT = %d count = %d LBCNT = %d count = %d \n",
1563 ns_stat_sfbqc_get(stat), card->sbpool.count,
1564 ns_stat_lfbqc_get(stat), card->lbpool.count);
1565 printk("hbpool.count = %d iovpool.count = %d \n",
1566 card->hbpool.count, card->iovpool.count);
1567 }
1568 #endif /* RX_DEBUG */
1569 }
1570
1571 static void fill_tst(ns_dev * card, int n, vc_map * vc)
1572 {
1573 u32 new_tst;
1574 unsigned long cl;
1575 int e, r;
1576 u32 data;
1577
1578 /* It would be very complicated to keep the two TSTs synchronized while
1579 assuring that writes are only made to the inactive TST. So, for now I
1580 will use only one TST. If problems occur, I will change this again */
1581
1582 new_tst = card->tst_addr;
1583
1584 /* Fill procedure */
1585
1586 for (e = 0; e < NS_TST_NUM_ENTRIES; e++) {
1587 if (card->tste2vc[e] == NULL)
1588 break;
1589 }
1590 if (e == NS_TST_NUM_ENTRIES) {
1591 printk("nicstar%d: No free TST entries found. \n", card->index);
1592 return;
1593 }
1594
1595 r = n;
1596 cl = NS_TST_NUM_ENTRIES;
1597 data = ns_tste_make(NS_TST_OPCODE_FIXED, vc->cbr_scd);
1598
1599 while (r > 0) {
1600 if (cl >= NS_TST_NUM_ENTRIES && card->tste2vc[e] == NULL) {
1601 card->tste2vc[e] = vc;
1602 ns_write_sram(card, new_tst + e, &data, 1);
1603 cl -= NS_TST_NUM_ENTRIES;
1604 r--;
1605 }
1606
1607 if (++e == NS_TST_NUM_ENTRIES) {
1608 e = 0;
1609 }
1610 cl += n;
1611 }
1612
1613 /* End of fill procedure */
1614
1615 data = ns_tste_make(NS_TST_OPCODE_END, new_tst);
1616 ns_write_sram(card, new_tst + NS_TST_NUM_ENTRIES, &data, 1);
1617 ns_write_sram(card, card->tst_addr + NS_TST_NUM_ENTRIES, &data, 1);
1618 card->tst_addr = new_tst;
1619 }
1620
1621 static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb)
1622 {
1623 ns_dev *card;
1624 vc_map *vc;
1625 scq_info *scq;
1626 unsigned long buflen;
1627 ns_scqe scqe;
1628 u32 flags; /* TBD flags, not CPU flags */
1629
1630 card = vcc->dev->dev_data;
1631 TXPRINTK("nicstar%d: ns_send() called.\n", card->index);
1632 if ((vc = (vc_map *) vcc->dev_data) == NULL) {
1633 printk("nicstar%d: vcc->dev_data == NULL on ns_send().\n",
1634 card->index);
1635 atomic_inc(&vcc->stats->tx_err);
1636 dev_kfree_skb_any(skb);
1637 return -EINVAL;
1638 }
1639
1640 if (!vc->tx) {
1641 printk("nicstar%d: Trying to transmit on a non-tx VC.\n",
1642 card->index);
1643 atomic_inc(&vcc->stats->tx_err);
1644 dev_kfree_skb_any(skb);
1645 return -EINVAL;
1646 }
1647
1648 if (vcc->qos.aal != ATM_AAL5 && vcc->qos.aal != ATM_AAL0) {
1649 printk("nicstar%d: Only AAL0 and AAL5 are supported.\n",
1650 card->index);
1651 atomic_inc(&vcc->stats->tx_err);
1652 dev_kfree_skb_any(skb);
1653 return -EINVAL;
1654 }
1655
1656 if (skb_shinfo(skb)->nr_frags != 0) {
1657 printk("nicstar%d: No scatter-gather yet.\n", card->index);
1658 atomic_inc(&vcc->stats->tx_err);
1659 dev_kfree_skb_any(skb);
1660 return -EINVAL;
1661 }
1662
1663 ATM_SKB(skb)->vcc = vcc;
1664
1665 NS_PRV_DMA(skb) = dma_map_single(&card->pcidev->dev, skb->data,
1666 skb->len, DMA_TO_DEVICE);
1667
1668 if (vcc->qos.aal == ATM_AAL5) {
1669 buflen = (skb->len + 47 + 8) / 48 * 48; /* Multiple of 48 */
1670 flags = NS_TBD_AAL5;
1671 scqe.word_2 = cpu_to_le32(NS_PRV_DMA(skb));
1672 scqe.word_3 = cpu_to_le32(skb->len);
1673 scqe.word_4 =
1674 ns_tbd_mkword_4(0, (u32) vcc->vpi, (u32) vcc->vci, 0,
1675 ATM_SKB(skb)->
1676 atm_options & ATM_ATMOPT_CLP ? 1 : 0);
1677 flags |= NS_TBD_EOPDU;
1678 } else { /* (vcc->qos.aal == ATM_AAL0) */
1679
1680 buflen = ATM_CELL_PAYLOAD; /* i.e., 48 bytes */
1681 flags = NS_TBD_AAL0;
1682 scqe.word_2 = cpu_to_le32(NS_PRV_DMA(skb) + NS_AAL0_HEADER);
1683 scqe.word_3 = cpu_to_le32(0x00000000);
1684 if (*skb->data & 0x02) /* Payload type 1 - end of pdu */
1685 flags |= NS_TBD_EOPDU;
1686 scqe.word_4 =
1687 cpu_to_le32(*((u32 *) skb->data) & ~NS_TBD_VC_MASK);
1688 /* Force the VPI/VCI to be the same as in VCC struct */
1689 scqe.word_4 |=
1690 cpu_to_le32((((u32) vcc->
1691 vpi) << NS_TBD_VPI_SHIFT | ((u32) vcc->
1692 vci) <<
1693 NS_TBD_VCI_SHIFT) & NS_TBD_VC_MASK);
1694 }
1695
1696 if (vcc->qos.txtp.traffic_class == ATM_CBR) {
1697 scqe.word_1 = ns_tbd_mkword_1_novbr(flags, (u32) buflen);
1698 scq = ((vc_map *) vcc->dev_data)->scq;
1699 } else {
1700 scqe.word_1 =
1701 ns_tbd_mkword_1(flags, (u32) 1, (u32) 1, (u32) buflen);
1702 scq = card->scq0;
1703 }
1704
1705 if (push_scqe(card, vc, scq, &scqe, skb) != 0) {
1706 atomic_inc(&vcc->stats->tx_err);
1707 dev_kfree_skb_any(skb);
1708 return -EIO;
1709 }
1710 atomic_inc(&vcc->stats->tx);
1711
1712 return 0;
1713 }
1714
1715 static int push_scqe(ns_dev * card, vc_map * vc, scq_info * scq, ns_scqe * tbd,
1716 struct sk_buff *skb)
1717 {
1718 unsigned long flags;
1719 ns_scqe tsr;
1720 u32 scdi, scqi;
1721 int scq_is_vbr;
1722 u32 data;
1723 int index;
1724
1725 spin_lock_irqsave(&scq->lock, flags);
1726 while (scq->tail == scq->next) {
1727 if (in_interrupt()) {
1728 spin_unlock_irqrestore(&scq->lock, flags);
1729 printk("nicstar%d: Error pushing TBD.\n", card->index);
1730 return 1;
1731 }
1732
1733 scq->full = 1;
1734 wait_event_interruptible_lock_irq_timeout(scq->scqfull_waitq,
1735 scq->tail != scq->next,
1736 scq->lock,
1737 SCQFULL_TIMEOUT);
1738
1739 if (scq->full) {
1740 spin_unlock_irqrestore(&scq->lock, flags);
1741 printk("nicstar%d: Timeout pushing TBD.\n",
1742 card->index);
1743 return 1;
1744 }
1745 }
1746 *scq->next = *tbd;
1747 index = (int)(scq->next - scq->base);
1748 scq->skb[index] = skb;
1749 XPRINTK("nicstar%d: sending skb at 0x%p (pos %d).\n",
1750 card->index, skb, index);
1751 XPRINTK("nicstar%d: TBD written:\n0x%x\n0x%x\n0x%x\n0x%x\n at 0x%p.\n",
1752 card->index, le32_to_cpu(tbd->word_1), le32_to_cpu(tbd->word_2),
1753 le32_to_cpu(tbd->word_3), le32_to_cpu(tbd->word_4),
1754 scq->next);
1755 if (scq->next == scq->last)
1756 scq->next = scq->base;
1757 else
1758 scq->next++;
1759
1760 vc->tbd_count++;
1761 if (scq->num_entries == VBR_SCQ_NUM_ENTRIES) {
1762 scq->tbd_count++;
1763 scq_is_vbr = 1;
1764 } else
1765 scq_is_vbr = 0;
1766
1767 if (vc->tbd_count >= MAX_TBD_PER_VC
1768 || scq->tbd_count >= MAX_TBD_PER_SCQ) {
1769 int has_run = 0;
1770
1771 while (scq->tail == scq->next) {
1772 if (in_interrupt()) {
1773 data = scq_virt_to_bus(scq, scq->next);
1774 ns_write_sram(card, scq->scd, &data, 1);
1775 spin_unlock_irqrestore(&scq->lock, flags);
1776 printk("nicstar%d: Error pushing TSR.\n",
1777 card->index);
1778 return 0;
1779 }
1780
1781 scq->full = 1;
1782 if (has_run++)
1783 break;
1784 wait_event_interruptible_lock_irq_timeout(scq->scqfull_waitq,
1785 scq->tail != scq->next,
1786 scq->lock,
1787 SCQFULL_TIMEOUT);
1788 }
1789
1790 if (!scq->full) {
1791 tsr.word_1 = ns_tsr_mkword_1(NS_TSR_INTENABLE);
1792 if (scq_is_vbr)
1793 scdi = NS_TSR_SCDISVBR;
1794 else
1795 scdi = (vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE;
1796 scqi = scq->next - scq->base;
1797 tsr.word_2 = ns_tsr_mkword_2(scdi, scqi);
1798 tsr.word_3 = 0x00000000;
1799 tsr.word_4 = 0x00000000;
1800
1801 *scq->next = tsr;
1802 index = (int)scqi;
1803 scq->skb[index] = NULL;
1804 XPRINTK
1805 ("nicstar%d: TSR written:\n0x%x\n0x%x\n0x%x\n0x%x\n at 0x%p.\n",
1806 card->index, le32_to_cpu(tsr.word_1),
1807 le32_to_cpu(tsr.word_2), le32_to_cpu(tsr.word_3),
1808 le32_to_cpu(tsr.word_4), scq->next);
1809 if (scq->next == scq->last)
1810 scq->next = scq->base;
1811 else
1812 scq->next++;
1813 vc->tbd_count = 0;
1814 scq->tbd_count = 0;
1815 } else
1816 PRINTK("nicstar%d: Timeout pushing TSR.\n",
1817 card->index);
1818 }
1819 data = scq_virt_to_bus(scq, scq->next);
1820 ns_write_sram(card, scq->scd, &data, 1);
1821
1822 spin_unlock_irqrestore(&scq->lock, flags);
1823
1824 return 0;
1825 }
1826
1827 static void process_tsq(ns_dev * card)
1828 {
1829 u32 scdi;
1830 scq_info *scq;
1831 ns_tsi *previous = NULL, *one_ahead, *two_ahead;
1832 int serviced_entries; /* flag indicating at least on entry was serviced */
1833
1834 serviced_entries = 0;
1835
1836 if (card->tsq.next == card->tsq.last)
1837 one_ahead = card->tsq.base;
1838 else
1839 one_ahead = card->tsq.next + 1;
1840
1841 if (one_ahead == card->tsq.last)
1842 two_ahead = card->tsq.base;
1843 else
1844 two_ahead = one_ahead + 1;
1845
1846 while (!ns_tsi_isempty(card->tsq.next) || !ns_tsi_isempty(one_ahead) ||
1847 !ns_tsi_isempty(two_ahead))
1848 /* At most two empty, as stated in the 77201 errata */
1849 {
1850 serviced_entries = 1;
1851
1852 /* Skip the one or two possible empty entries */
1853 while (ns_tsi_isempty(card->tsq.next)) {
1854 if (card->tsq.next == card->tsq.last)
1855 card->tsq.next = card->tsq.base;
1856 else
1857 card->tsq.next++;
1858 }
1859
1860 if (!ns_tsi_tmrof(card->tsq.next)) {
1861 scdi = ns_tsi_getscdindex(card->tsq.next);
1862 if (scdi == NS_TSI_SCDISVBR)
1863 scq = card->scq0;
1864 else {
1865 if (card->scd2vc[scdi] == NULL) {
1866 printk
1867 ("nicstar%d: could not find VC from SCD index.\n",
1868 card->index);
1869 ns_tsi_init(card->tsq.next);
1870 return;
1871 }
1872 scq = card->scd2vc[scdi]->scq;
1873 }
1874 drain_scq(card, scq, ns_tsi_getscqpos(card->tsq.next));
1875 scq->full = 0;
1876 wake_up_interruptible(&(scq->scqfull_waitq));
1877 }
1878
1879 ns_tsi_init(card->tsq.next);
1880 previous = card->tsq.next;
1881 if (card->tsq.next == card->tsq.last)
1882 card->tsq.next = card->tsq.base;
1883 else
1884 card->tsq.next++;
1885
1886 if (card->tsq.next == card->tsq.last)
1887 one_ahead = card->tsq.base;
1888 else
1889 one_ahead = card->tsq.next + 1;
1890
1891 if (one_ahead == card->tsq.last)
1892 two_ahead = card->tsq.base;
1893 else
1894 two_ahead = one_ahead + 1;
1895 }
1896
1897 if (serviced_entries)
1898 writel(PTR_DIFF(previous, card->tsq.base),
1899 card->membase + TSQH);
1900 }
1901
1902 static void drain_scq(ns_dev * card, scq_info * scq, int pos)
1903 {
1904 struct atm_vcc *vcc;
1905 struct sk_buff *skb;
1906 int i;
1907 unsigned long flags;
1908
1909 XPRINTK("nicstar%d: drain_scq() called, scq at 0x%p, pos %d.\n",
1910 card->index, scq, pos);
1911 if (pos >= scq->num_entries) {
1912 printk("nicstar%d: Bad index on drain_scq().\n", card->index);
1913 return;
1914 }
1915
1916 spin_lock_irqsave(&scq->lock, flags);
1917 i = (int)(scq->tail - scq->base);
1918 if (++i == scq->num_entries)
1919 i = 0;
1920 while (i != pos) {
1921 skb = scq->skb[i];
1922 XPRINTK("nicstar%d: freeing skb at 0x%p (index %d).\n",
1923 card->index, skb, i);
1924 if (skb != NULL) {
1925 dma_unmap_single(&card->pcidev->dev,
1926 NS_PRV_DMA(skb),
1927 skb->len,
1928 DMA_TO_DEVICE);
1929 vcc = ATM_SKB(skb)->vcc;
1930 if (vcc && vcc->pop != NULL) {
1931 vcc->pop(vcc, skb);
1932 } else {
1933 dev_kfree_skb_irq(skb);
1934 }
1935 scq->skb[i] = NULL;
1936 }
1937 if (++i == scq->num_entries)
1938 i = 0;
1939 }
1940 scq->tail = scq->base + pos;
1941 spin_unlock_irqrestore(&scq->lock, flags);
1942 }
1943
1944 static void process_rsq(ns_dev * card)
1945 {
1946 ns_rsqe *previous;
1947
1948 if (!ns_rsqe_valid(card->rsq.next))
1949 return;
1950 do {
1951 dequeue_rx(card, card->rsq.next);
1952 ns_rsqe_init(card->rsq.next);
1953 previous = card->rsq.next;
1954 if (card->rsq.next == card->rsq.last)
1955 card->rsq.next = card->rsq.base;
1956 else
1957 card->rsq.next++;
1958 } while (ns_rsqe_valid(card->rsq.next));
1959 writel(PTR_DIFF(previous, card->rsq.base), card->membase + RSQH);
1960 }
1961
1962 static void dequeue_rx(ns_dev * card, ns_rsqe * rsqe)
1963 {
1964 u32 vpi, vci;
1965 vc_map *vc;
1966 struct sk_buff *iovb;
1967 struct iovec *iov;
1968 struct atm_vcc *vcc;
1969 struct sk_buff *skb;
1970 unsigned short aal5_len;
1971 int len;
1972 u32 stat;
1973 u32 id;
1974
1975 stat = readl(card->membase + STAT);
1976 card->sbfqc = ns_stat_sfbqc_get(stat);
1977 card->lbfqc = ns_stat_lfbqc_get(stat);
1978
1979 id = le32_to_cpu(rsqe->buffer_handle);
1980 skb = idr_find(&card->idr, id);
1981 if (!skb) {
1982 RXPRINTK(KERN_ERR
1983 "nicstar%d: idr_find() failed!\n", card->index);
1984 return;
1985 }
1986 idr_remove(&card->idr, id);
1987 dma_sync_single_for_cpu(&card->pcidev->dev,
1988 NS_PRV_DMA(skb),
1989 (NS_PRV_BUFTYPE(skb) == BUF_SM
1990 ? NS_SMSKBSIZE : NS_LGSKBSIZE),
1991 DMA_FROM_DEVICE);
1992 dma_unmap_single(&card->pcidev->dev,
1993 NS_PRV_DMA(skb),
1994 (NS_PRV_BUFTYPE(skb) == BUF_SM
1995 ? NS_SMSKBSIZE : NS_LGSKBSIZE),
1996 DMA_FROM_DEVICE);
1997 vpi = ns_rsqe_vpi(rsqe);
1998 vci = ns_rsqe_vci(rsqe);
1999 if (vpi >= 1UL << card->vpibits || vci >= 1UL << card->vcibits) {
2000 printk("nicstar%d: SDU received for out-of-range vc %d.%d.\n",
2001 card->index, vpi, vci);
2002 recycle_rx_buf(card, skb);
2003 return;
2004 }
2005
2006 vc = &(card->vcmap[vpi << card->vcibits | vci]);
2007 if (!vc->rx) {
2008 RXPRINTK("nicstar%d: SDU received on non-rx vc %d.%d.\n",
2009 card->index, vpi, vci);
2010 recycle_rx_buf(card, skb);
2011 return;
2012 }
2013
2014 vcc = vc->rx_vcc;
2015
2016 if (vcc->qos.aal == ATM_AAL0) {
2017 struct sk_buff *sb;
2018 unsigned char *cell;
2019 int i;
2020
2021 cell = skb->data;
2022 for (i = ns_rsqe_cellcount(rsqe); i; i--) {
2023 if ((sb = dev_alloc_skb(NS_SMSKBSIZE)) == NULL) {
2024 printk
2025 ("nicstar%d: Can't allocate buffers for aal0.\n",
2026 card->index);
2027 atomic_add(i, &vcc->stats->rx_drop);
2028 break;
2029 }
2030 if (!atm_charge(vcc, sb->truesize)) {
2031 RXPRINTK
2032 ("nicstar%d: atm_charge() dropped aal0 packets.\n",
2033 card->index);
2034 atomic_add(i - 1, &vcc->stats->rx_drop); /* already increased by 1 */
2035 dev_kfree_skb_any(sb);
2036 break;
2037 }
2038 /* Rebuild the header */
2039 *((u32 *) sb->data) = le32_to_cpu(rsqe->word_1) << 4 |
2040 (ns_rsqe_clp(rsqe) ? 0x00000001 : 0x00000000);
2041 if (i == 1 && ns_rsqe_eopdu(rsqe))
2042 *((u32 *) sb->data) |= 0x00000002;
2043 skb_put(sb, NS_AAL0_HEADER);
2044 memcpy(skb_tail_pointer(sb), cell, ATM_CELL_PAYLOAD);
2045 skb_put(sb, ATM_CELL_PAYLOAD);
2046 ATM_SKB(sb)->vcc = vcc;
2047 __net_timestamp(sb);
2048 vcc->push(vcc, sb);
2049 atomic_inc(&vcc->stats->rx);
2050 cell += ATM_CELL_PAYLOAD;
2051 }
2052
2053 recycle_rx_buf(card, skb);
2054 return;
2055 }
2056
2057 /* To reach this point, the AAL layer can only be AAL5 */
2058
2059 if ((iovb = vc->rx_iov) == NULL) {
2060 iovb = skb_dequeue(&(card->iovpool.queue));
2061 if (iovb == NULL) { /* No buffers in the queue */
2062 iovb = alloc_skb(NS_IOVBUFSIZE, GFP_ATOMIC);
2063 if (iovb == NULL) {
2064 printk("nicstar%d: Out of iovec buffers.\n",
2065 card->index);
2066 atomic_inc(&vcc->stats->rx_drop);
2067 recycle_rx_buf(card, skb);
2068 return;
2069 }
2070 NS_PRV_BUFTYPE(iovb) = BUF_NONE;
2071 } else if (--card->iovpool.count < card->iovnr.min) {
2072 struct sk_buff *new_iovb;
2073 if ((new_iovb =
2074 alloc_skb(NS_IOVBUFSIZE, GFP_ATOMIC)) != NULL) {
2075 NS_PRV_BUFTYPE(iovb) = BUF_NONE;
2076 skb_queue_tail(&card->iovpool.queue, new_iovb);
2077 card->iovpool.count++;
2078 }
2079 }
2080 vc->rx_iov = iovb;
2081 NS_PRV_IOVCNT(iovb) = 0;
2082 iovb->len = 0;
2083 iovb->data = iovb->head;
2084 skb_reset_tail_pointer(iovb);
2085 /* IMPORTANT: a pointer to the sk_buff containing the small or large
2086 buffer is stored as iovec base, NOT a pointer to the
2087 small or large buffer itself. */
2088 } else if (NS_PRV_IOVCNT(iovb) >= NS_MAX_IOVECS) {
2089 printk("nicstar%d: received too big AAL5 SDU.\n", card->index);
2090 atomic_inc(&vcc->stats->rx_err);
2091 recycle_iovec_rx_bufs(card, (struct iovec *)iovb->data,
2092 NS_MAX_IOVECS);
2093 NS_PRV_IOVCNT(iovb) = 0;
2094 iovb->len = 0;
2095 iovb->data = iovb->head;
2096 skb_reset_tail_pointer(iovb);
2097 }
2098 iov = &((struct iovec *)iovb->data)[NS_PRV_IOVCNT(iovb)++];
2099 iov->iov_base = (void *)skb;
2100 iov->iov_len = ns_rsqe_cellcount(rsqe) * 48;
2101 iovb->len += iov->iov_len;
2102
2103 #ifdef EXTRA_DEBUG
2104 if (NS_PRV_IOVCNT(iovb) == 1) {
2105 if (NS_PRV_BUFTYPE(skb) != BUF_SM) {
2106 printk
2107 ("nicstar%d: Expected a small buffer, and this is not one.\n",
2108 card->index);
2109 which_list(card, skb);
2110 atomic_inc(&vcc->stats->rx_err);
2111 recycle_rx_buf(card, skb);
2112 vc->rx_iov = NULL;
2113 recycle_iov_buf(card, iovb);
2114 return;
2115 }
2116 } else { /* NS_PRV_IOVCNT(iovb) >= 2 */
2117
2118 if (NS_PRV_BUFTYPE(skb) != BUF_LG) {
2119 printk
2120 ("nicstar%d: Expected a large buffer, and this is not one.\n",
2121 card->index);
2122 which_list(card, skb);
2123 atomic_inc(&vcc->stats->rx_err);
2124 recycle_iovec_rx_bufs(card, (struct iovec *)iovb->data,
2125 NS_PRV_IOVCNT(iovb));
2126 vc->rx_iov = NULL;
2127 recycle_iov_buf(card, iovb);
2128 return;
2129 }
2130 }
2131 #endif /* EXTRA_DEBUG */
2132
2133 if (ns_rsqe_eopdu(rsqe)) {
2134 /* This works correctly regardless of the endianness of the host */
2135 unsigned char *L1L2 = (unsigned char *)
2136 (skb->data + iov->iov_len - 6);
2137 aal5_len = L1L2[0] << 8 | L1L2[1];
2138 len = (aal5_len == 0x0000) ? 0x10000 : aal5_len;
2139 if (ns_rsqe_crcerr(rsqe) ||
2140 len + 8 > iovb->len || len + (47 + 8) < iovb->len) {
2141 printk("nicstar%d: AAL5 CRC error", card->index);
2142 if (len + 8 > iovb->len || len + (47 + 8) < iovb->len)
2143 printk(" - PDU size mismatch.\n");
2144 else
2145 printk(".\n");
2146 atomic_inc(&vcc->stats->rx_err);
2147 recycle_iovec_rx_bufs(card, (struct iovec *)iovb->data,
2148 NS_PRV_IOVCNT(iovb));
2149 vc->rx_iov = NULL;
2150 recycle_iov_buf(card, iovb);
2151 return;
2152 }
2153
2154 /* By this point we (hopefully) have a complete SDU without errors. */
2155
2156 if (NS_PRV_IOVCNT(iovb) == 1) { /* Just a small buffer */
2157 /* skb points to a small buffer */
2158 if (!atm_charge(vcc, skb->truesize)) {
2159 push_rxbufs(card, skb);
2160 atomic_inc(&vcc->stats->rx_drop);
2161 } else {
2162 skb_put(skb, len);
2163 dequeue_sm_buf(card, skb);
2164 ATM_SKB(skb)->vcc = vcc;
2165 __net_timestamp(skb);
2166 vcc->push(vcc, skb);
2167 atomic_inc(&vcc->stats->rx);
2168 }
2169 } else if (NS_PRV_IOVCNT(iovb) == 2) { /* One small plus one large buffer */
2170 struct sk_buff *sb;
2171
2172 sb = (struct sk_buff *)(iov - 1)->iov_base;
2173 /* skb points to a large buffer */
2174
2175 if (len <= NS_SMBUFSIZE) {
2176 if (!atm_charge(vcc, sb->truesize)) {
2177 push_rxbufs(card, sb);
2178 atomic_inc(&vcc->stats->rx_drop);
2179 } else {
2180 skb_put(sb, len);
2181 dequeue_sm_buf(card, sb);
2182 ATM_SKB(sb)->vcc = vcc;
2183 __net_timestamp(sb);
2184 vcc->push(vcc, sb);
2185 atomic_inc(&vcc->stats->rx);
2186 }
2187
2188 push_rxbufs(card, skb);
2189
2190 } else { /* len > NS_SMBUFSIZE, the usual case */
2191
2192 if (!atm_charge(vcc, skb->truesize)) {
2193 push_rxbufs(card, skb);
2194 atomic_inc(&vcc->stats->rx_drop);
2195 } else {
2196 dequeue_lg_buf(card, skb);
2197 skb_push(skb, NS_SMBUFSIZE);
2198 skb_copy_from_linear_data(sb, skb->data,
2199 NS_SMBUFSIZE);
2200 skb_put(skb, len - NS_SMBUFSIZE);
2201 ATM_SKB(skb)->vcc = vcc;
2202 __net_timestamp(skb);
2203 vcc->push(vcc, skb);
2204 atomic_inc(&vcc->stats->rx);
2205 }
2206
2207 push_rxbufs(card, sb);
2208
2209 }
2210
2211 } else { /* Must push a huge buffer */
2212
2213 struct sk_buff *hb, *sb, *lb;
2214 int remaining, tocopy;
2215 int j;
2216
2217 hb = skb_dequeue(&(card->hbpool.queue));
2218 if (hb == NULL) { /* No buffers in the queue */
2219
2220 hb = dev_alloc_skb(NS_HBUFSIZE);
2221 if (hb == NULL) {
2222 printk
2223 ("nicstar%d: Out of huge buffers.\n",
2224 card->index);
2225 atomic_inc(&vcc->stats->rx_drop);
2226 recycle_iovec_rx_bufs(card,
2227 (struct iovec *)
2228 iovb->data,
2229 NS_PRV_IOVCNT(iovb));
2230 vc->rx_iov = NULL;
2231 recycle_iov_buf(card, iovb);
2232 return;
2233 } else if (card->hbpool.count < card->hbnr.min) {
2234 struct sk_buff *new_hb;
2235 if ((new_hb =
2236 dev_alloc_skb(NS_HBUFSIZE)) !=
2237 NULL) {
2238 skb_queue_tail(&card->hbpool.
2239 queue, new_hb);
2240 card->hbpool.count++;
2241 }
2242 }
2243 NS_PRV_BUFTYPE(hb) = BUF_NONE;
2244 } else if (--card->hbpool.count < card->hbnr.min) {
2245 struct sk_buff *new_hb;
2246 if ((new_hb =
2247 dev_alloc_skb(NS_HBUFSIZE)) != NULL) {
2248 NS_PRV_BUFTYPE(new_hb) = BUF_NONE;
2249 skb_queue_tail(&card->hbpool.queue,
2250 new_hb);
2251 card->hbpool.count++;
2252 }
2253 if (card->hbpool.count < card->hbnr.min) {
2254 if ((new_hb =
2255 dev_alloc_skb(NS_HBUFSIZE)) !=
2256 NULL) {
2257 NS_PRV_BUFTYPE(new_hb) =
2258 BUF_NONE;
2259 skb_queue_tail(&card->hbpool.
2260 queue, new_hb);
2261 card->hbpool.count++;
2262 }
2263 }
2264 }
2265
2266 iov = (struct iovec *)iovb->data;
2267
2268 if (!atm_charge(vcc, hb->truesize)) {
2269 recycle_iovec_rx_bufs(card, iov,
2270 NS_PRV_IOVCNT(iovb));
2271 if (card->hbpool.count < card->hbnr.max) {
2272 skb_queue_tail(&card->hbpool.queue, hb);
2273 card->hbpool.count++;
2274 } else
2275 dev_kfree_skb_any(hb);
2276 atomic_inc(&vcc->stats->rx_drop);
2277 } else {
2278 /* Copy the small buffer to the huge buffer */
2279 sb = (struct sk_buff *)iov->iov_base;
2280 skb_copy_from_linear_data(sb, hb->data,
2281 iov->iov_len);
2282 skb_put(hb, iov->iov_len);
2283 remaining = len - iov->iov_len;
2284 iov++;
2285 /* Free the small buffer */
2286 push_rxbufs(card, sb);
2287
2288 /* Copy all large buffers to the huge buffer and free them */
2289 for (j = 1; j < NS_PRV_IOVCNT(iovb); j++) {
2290 lb = (struct sk_buff *)iov->iov_base;
2291 tocopy =
2292 min_t(int, remaining, iov->iov_len);
2293 skb_copy_from_linear_data(lb,
2294 skb_tail_pointer
2295 (hb), tocopy);
2296 skb_put(hb, tocopy);
2297 iov++;
2298 remaining -= tocopy;
2299 push_rxbufs(card, lb);
2300 }
2301 #ifdef EXTRA_DEBUG
2302 if (remaining != 0 || hb->len != len)
2303 printk
2304 ("nicstar%d: Huge buffer len mismatch.\n",
2305 card->index);
2306 #endif /* EXTRA_DEBUG */
2307 ATM_SKB(hb)->vcc = vcc;
2308 __net_timestamp(hb);
2309 vcc->push(vcc, hb);
2310 atomic_inc(&vcc->stats->rx);
2311 }
2312 }
2313
2314 vc->rx_iov = NULL;
2315 recycle_iov_buf(card, iovb);
2316 }
2317
2318 }
2319
2320 static void recycle_rx_buf(ns_dev * card, struct sk_buff *skb)
2321 {
2322 if (unlikely(NS_PRV_BUFTYPE(skb) == BUF_NONE)) {
2323 printk("nicstar%d: What kind of rx buffer is this?\n",
2324 card->index);
2325 dev_kfree_skb_any(skb);
2326 } else
2327 push_rxbufs(card, skb);
2328 }
2329
2330 static void recycle_iovec_rx_bufs(ns_dev * card, struct iovec *iov, int count)
2331 {
2332 while (count-- > 0)
2333 recycle_rx_buf(card, (struct sk_buff *)(iov++)->iov_base);
2334 }
2335
2336 static void recycle_iov_buf(ns_dev * card, struct sk_buff *iovb)
2337 {
2338 if (card->iovpool.count < card->iovnr.max) {
2339 skb_queue_tail(&card->iovpool.queue, iovb);
2340 card->iovpool.count++;
2341 } else
2342 dev_kfree_skb_any(iovb);
2343 }
2344
2345 static void dequeue_sm_buf(ns_dev * card, struct sk_buff *sb)
2346 {
2347 skb_unlink(sb, &card->sbpool.queue);
2348 if (card->sbfqc < card->sbnr.init) {
2349 struct sk_buff *new_sb;
2350 if ((new_sb = dev_alloc_skb(NS_SMSKBSIZE)) != NULL) {
2351 NS_PRV_BUFTYPE(new_sb) = BUF_SM;
2352 skb_queue_tail(&card->sbpool.queue, new_sb);
2353 skb_reserve(new_sb, NS_AAL0_HEADER);
2354 push_rxbufs(card, new_sb);
2355 }
2356 }
2357 if (card->sbfqc < card->sbnr.init)
2358 {
2359 struct sk_buff *new_sb;
2360 if ((new_sb = dev_alloc_skb(NS_SMSKBSIZE)) != NULL) {
2361 NS_PRV_BUFTYPE(new_sb) = BUF_SM;
2362 skb_queue_tail(&card->sbpool.queue, new_sb);
2363 skb_reserve(new_sb, NS_AAL0_HEADER);
2364 push_rxbufs(card, new_sb);
2365 }
2366 }
2367 }
2368
2369 static void dequeue_lg_buf(ns_dev * card, struct sk_buff *lb)
2370 {
2371 skb_unlink(lb, &card->lbpool.queue);
2372 if (card->lbfqc < card->lbnr.init) {
2373 struct sk_buff *new_lb;
2374 if ((new_lb = dev_alloc_skb(NS_LGSKBSIZE)) != NULL) {
2375 NS_PRV_BUFTYPE(new_lb) = BUF_LG;
2376 skb_queue_tail(&card->lbpool.queue, new_lb);
2377 skb_reserve(new_lb, NS_SMBUFSIZE);
2378 push_rxbufs(card, new_lb);
2379 }
2380 }
2381 if (card->lbfqc < card->lbnr.init)
2382 {
2383 struct sk_buff *new_lb;
2384 if ((new_lb = dev_alloc_skb(NS_LGSKBSIZE)) != NULL) {
2385 NS_PRV_BUFTYPE(new_lb) = BUF_LG;
2386 skb_queue_tail(&card->lbpool.queue, new_lb);
2387 skb_reserve(new_lb, NS_SMBUFSIZE);
2388 push_rxbufs(card, new_lb);
2389 }
2390 }
2391 }
2392
2393 static int ns_proc_read(struct atm_dev *dev, loff_t * pos, char *page)
2394 {
2395 u32 stat;
2396 ns_dev *card;
2397 int left;
2398
2399 left = (int)*pos;
2400 card = (ns_dev *) dev->dev_data;
2401 stat = readl(card->membase + STAT);
2402 if (!left--)
2403 return sprintf(page, "Pool count min init max \n");
2404 if (!left--)
2405 return sprintf(page, "Small %5d %5d %5d %5d \n",
2406 ns_stat_sfbqc_get(stat), card->sbnr.min,
2407 card->sbnr.init, card->sbnr.max);
2408 if (!left--)
2409 return sprintf(page, "Large %5d %5d %5d %5d \n",
2410 ns_stat_lfbqc_get(stat), card->lbnr.min,
2411 card->lbnr.init, card->lbnr.max);
2412 if (!left--)
2413 return sprintf(page, "Huge %5d %5d %5d %5d \n",
2414 card->hbpool.count, card->hbnr.min,
2415 card->hbnr.init, card->hbnr.max);
2416 if (!left--)
2417 return sprintf(page, "Iovec %5d %5d %5d %5d \n",
2418 card->iovpool.count, card->iovnr.min,
2419 card->iovnr.init, card->iovnr.max);
2420 if (!left--) {
2421 int retval;
2422 retval =
2423 sprintf(page, "Interrupt counter: %u \n", card->intcnt);
2424 card->intcnt = 0;
2425 return retval;
2426 }
2427 #if 0
2428 /* Dump 25.6 Mbps PHY registers */
2429 /* Now there's a 25.6 Mbps PHY driver this code isn't needed. I left it
2430 here just in case it's needed for debugging. */
2431 if (card->max_pcr == ATM_25_PCR && !left--) {
2432 u32 phy_regs[4];
2433 u32 i;
2434
2435 for (i = 0; i < 4; i++) {
2436 while (CMD_BUSY(card)) ;
2437 writel(NS_CMD_READ_UTILITY | 0x00000200 | i,
2438 card->membase + CMD);
2439 while (CMD_BUSY(card)) ;
2440 phy_regs[i] = readl(card->membase + DR0) & 0x000000FF;
2441 }
2442
2443 return sprintf(page, "PHY regs: 0x%02X 0x%02X 0x%02X 0x%02X \n",
2444 phy_regs[0], phy_regs[1], phy_regs[2],
2445 phy_regs[3]);
2446 }
2447 #endif /* 0 - Dump 25.6 Mbps PHY registers */
2448 #if 0
2449 /* Dump TST */
2450 if (left-- < NS_TST_NUM_ENTRIES) {
2451 if (card->tste2vc[left + 1] == NULL)
2452 return sprintf(page, "%5d - VBR/UBR \n", left + 1);
2453 else
2454 return sprintf(page, "%5d - %d %d \n", left + 1,
2455 card->tste2vc[left + 1]->tx_vcc->vpi,
2456 card->tste2vc[left + 1]->tx_vcc->vci);
2457 }
2458 #endif /* 0 */
2459 return 0;
2460 }
2461
2462 static int ns_ioctl(struct atm_dev *dev, unsigned int cmd, void __user * arg)
2463 {
2464 ns_dev *card;
2465 pool_levels pl;
2466 long btype;
2467 unsigned long flags;
2468
2469 card = dev->dev_data;
2470 switch (cmd) {
2471 case NS_GETPSTAT:
2472 if (get_user
2473 (pl.buftype, &((pool_levels __user *) arg)->buftype))
2474 return -EFAULT;
2475 switch (pl.buftype) {
2476 case NS_BUFTYPE_SMALL:
2477 pl.count =
2478 ns_stat_sfbqc_get(readl(card->membase + STAT));
2479 pl.level.min = card->sbnr.min;
2480 pl.level.init = card->sbnr.init;
2481 pl.level.max = card->sbnr.max;
2482 break;
2483
2484 case NS_BUFTYPE_LARGE:
2485 pl.count =
2486 ns_stat_lfbqc_get(readl(card->membase + STAT));
2487 pl.level.min = card->lbnr.min;
2488 pl.level.init = card->lbnr.init;
2489 pl.level.max = card->lbnr.max;
2490 break;
2491
2492 case NS_BUFTYPE_HUGE:
2493 pl.count = card->hbpool.count;
2494 pl.level.min = card->hbnr.min;
2495 pl.level.init = card->hbnr.init;
2496 pl.level.max = card->hbnr.max;
2497 break;
2498
2499 case NS_BUFTYPE_IOVEC:
2500 pl.count = card->iovpool.count;
2501 pl.level.min = card->iovnr.min;
2502 pl.level.init = card->iovnr.init;
2503 pl.level.max = card->iovnr.max;
2504 break;
2505
2506 default:
2507 return -ENOIOCTLCMD;
2508
2509 }
2510 if (!copy_to_user((pool_levels __user *) arg, &pl, sizeof(pl)))
2511 return (sizeof(pl));
2512 else
2513 return -EFAULT;
2514
2515 case NS_SETBUFLEV:
2516 if (!capable(CAP_NET_ADMIN))
2517 return -EPERM;
2518 if (copy_from_user(&pl, (pool_levels __user *) arg, sizeof(pl)))
2519 return -EFAULT;
2520 if (pl.level.min >= pl.level.init
2521 || pl.level.init >= pl.level.max)
2522 return -EINVAL;
2523 if (pl.level.min == 0)
2524 return -EINVAL;
2525 switch (pl.buftype) {
2526 case NS_BUFTYPE_SMALL:
2527 if (pl.level.max > TOP_SB)
2528 return -EINVAL;
2529 card->sbnr.min = pl.level.min;
2530 card->sbnr.init = pl.level.init;
2531 card->sbnr.max = pl.level.max;
2532 break;
2533
2534 case NS_BUFTYPE_LARGE:
2535 if (pl.level.max > TOP_LB)
2536 return -EINVAL;
2537 card->lbnr.min = pl.level.min;
2538 card->lbnr.init = pl.level.init;
2539 card->lbnr.max = pl.level.max;
2540 break;
2541
2542 case NS_BUFTYPE_HUGE:
2543 if (pl.level.max > TOP_HB)
2544 return -EINVAL;
2545 card->hbnr.min = pl.level.min;
2546 card->hbnr.init = pl.level.init;
2547 card->hbnr.max = pl.level.max;
2548 break;
2549
2550 case NS_BUFTYPE_IOVEC:
2551 if (pl.level.max > TOP_IOVB)
2552 return -EINVAL;
2553 card->iovnr.min = pl.level.min;
2554 card->iovnr.init = pl.level.init;
2555 card->iovnr.max = pl.level.max;
2556 break;
2557
2558 default:
2559 return -EINVAL;
2560
2561 }
2562 return 0;
2563
2564 case NS_ADJBUFLEV:
2565 if (!capable(CAP_NET_ADMIN))
2566 return -EPERM;
2567 btype = (long)arg; /* a long is the same size as a pointer or bigger */
2568 switch (btype) {
2569 case NS_BUFTYPE_SMALL:
2570 while (card->sbfqc < card->sbnr.init) {
2571 struct sk_buff *sb;
2572
2573 sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
2574 if (sb == NULL)
2575 return -ENOMEM;
2576 NS_PRV_BUFTYPE(sb) = BUF_SM;
2577 skb_queue_tail(&card->sbpool.queue, sb);
2578 skb_reserve(sb, NS_AAL0_HEADER);
2579 push_rxbufs(card, sb);
2580 }
2581 break;
2582
2583 case NS_BUFTYPE_LARGE:
2584 while (card->lbfqc < card->lbnr.init) {
2585 struct sk_buff *lb;
2586
2587 lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
2588 if (lb == NULL)
2589 return -ENOMEM;
2590 NS_PRV_BUFTYPE(lb) = BUF_LG;
2591 skb_queue_tail(&card->lbpool.queue, lb);
2592 skb_reserve(lb, NS_SMBUFSIZE);
2593 push_rxbufs(card, lb);
2594 }
2595 break;
2596
2597 case NS_BUFTYPE_HUGE:
2598 while (card->hbpool.count > card->hbnr.init) {
2599 struct sk_buff *hb;
2600
2601 spin_lock_irqsave(&card->int_lock, flags);
2602 hb = skb_dequeue(&card->hbpool.queue);
2603 card->hbpool.count--;
2604 spin_unlock_irqrestore(&card->int_lock, flags);
2605 if (hb == NULL)
2606 printk
2607 ("nicstar%d: huge buffer count inconsistent.\n",
2608 card->index);
2609 else
2610 dev_kfree_skb_any(hb);
2611
2612 }
2613 while (card->hbpool.count < card->hbnr.init) {
2614 struct sk_buff *hb;
2615
2616 hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
2617 if (hb == NULL)
2618 return -ENOMEM;
2619 NS_PRV_BUFTYPE(hb) = BUF_NONE;
2620 spin_lock_irqsave(&card->int_lock, flags);
2621 skb_queue_tail(&card->hbpool.queue, hb);
2622 card->hbpool.count++;
2623 spin_unlock_irqrestore(&card->int_lock, flags);
2624 }
2625 break;
2626
2627 case NS_BUFTYPE_IOVEC:
2628 while (card->iovpool.count > card->iovnr.init) {
2629 struct sk_buff *iovb;
2630
2631 spin_lock_irqsave(&card->int_lock, flags);
2632 iovb = skb_dequeue(&card->iovpool.queue);
2633 card->iovpool.count--;
2634 spin_unlock_irqrestore(&card->int_lock, flags);
2635 if (iovb == NULL)
2636 printk
2637 ("nicstar%d: iovec buffer count inconsistent.\n",
2638 card->index);
2639 else
2640 dev_kfree_skb_any(iovb);
2641
2642 }
2643 while (card->iovpool.count < card->iovnr.init) {
2644 struct sk_buff *iovb;
2645
2646 iovb = alloc_skb(NS_IOVBUFSIZE, GFP_KERNEL);
2647 if (iovb == NULL)
2648 return -ENOMEM;
2649 NS_PRV_BUFTYPE(iovb) = BUF_NONE;
2650 spin_lock_irqsave(&card->int_lock, flags);
2651 skb_queue_tail(&card->iovpool.queue, iovb);
2652 card->iovpool.count++;
2653 spin_unlock_irqrestore(&card->int_lock, flags);
2654 }
2655 break;
2656
2657 default:
2658 return -EINVAL;
2659
2660 }
2661 return 0;
2662
2663 default:
2664 if (dev->phy && dev->phy->ioctl) {
2665 return dev->phy->ioctl(dev, cmd, arg);
2666 } else {
2667 printk("nicstar%d: %s == NULL \n", card->index,
2668 dev->phy ? "dev->phy->ioctl" : "dev->phy");
2669 return -ENOIOCTLCMD;
2670 }
2671 }
2672 }
2673
2674 #ifdef EXTRA_DEBUG
2675 static void which_list(ns_dev * card, struct sk_buff *skb)
2676 {
2677 printk("skb buf_type: 0x%08x\n", NS_PRV_BUFTYPE(skb));
2678 }
2679 #endif /* EXTRA_DEBUG */
2680
2681 static void ns_poll(unsigned long arg)
2682 {
2683 int i;
2684 ns_dev *card;
2685 unsigned long flags;
2686 u32 stat_r, stat_w;
2687
2688 PRINTK("nicstar: Entering ns_poll().\n");
2689 for (i = 0; i < num_cards; i++) {
2690 card = cards[i];
2691 if (spin_is_locked(&card->int_lock)) {
2692 /* Probably it isn't worth spinning */
2693 continue;
2694 }
2695 spin_lock_irqsave(&card->int_lock, flags);
2696
2697 stat_w = 0;
2698 stat_r = readl(card->membase + STAT);
2699 if (stat_r & NS_STAT_TSIF)
2700 stat_w |= NS_STAT_TSIF;
2701 if (stat_r & NS_STAT_EOPDU)
2702 stat_w |= NS_STAT_EOPDU;
2703
2704 process_tsq(card);
2705 process_rsq(card);
2706
2707 writel(stat_w, card->membase + STAT);
2708 spin_unlock_irqrestore(&card->int_lock, flags);
2709 }
2710 mod_timer(&ns_timer, jiffies + NS_POLL_PERIOD);
2711 PRINTK("nicstar: Leaving ns_poll().\n");
2712 }
2713
2714 static void ns_phy_put(struct atm_dev *dev, unsigned char value,
2715 unsigned long addr)
2716 {
2717 ns_dev *card;
2718 unsigned long flags;
2719
2720 card = dev->dev_data;
2721 spin_lock_irqsave(&card->res_lock, flags);
2722 while (CMD_BUSY(card)) ;
2723 writel((u32) value, card->membase + DR0);
2724 writel(NS_CMD_WRITE_UTILITY | 0x00000200 | (addr & 0x000000FF),
2725 card->membase + CMD);
2726 spin_unlock_irqrestore(&card->res_lock, flags);
2727 }
2728
2729 static unsigned char ns_phy_get(struct atm_dev *dev, unsigned long addr)
2730 {
2731 ns_dev *card;
2732 unsigned long flags;
2733 u32 data;
2734
2735 card = dev->dev_data;
2736 spin_lock_irqsave(&card->res_lock, flags);
2737 while (CMD_BUSY(card)) ;
2738 writel(NS_CMD_READ_UTILITY | 0x00000200 | (addr & 0x000000FF),
2739 card->membase + CMD);
2740 while (CMD_BUSY(card)) ;
2741 data = readl(card->membase + DR0) & 0x000000FF;
2742 spin_unlock_irqrestore(&card->res_lock, flags);
2743 return (unsigned char)data;
2744 }
2745
2746 module_init(nicstar_init);
2747 module_exit(nicstar_cleanup);
Linux kernel - Deliverables
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