Loading...
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * nicstar.c
4 *
5 * Device driver supporting CBR for IDT 77201/77211 "NICStAR" based cards.
6 *
7 * IMPORTANT: The included file nicstarmac.c was NOT WRITTEN BY ME.
8 * It was taken from the frle-0.22 device driver.
9 * As the file doesn't have a copyright notice, in the file
10 * nicstarmac.copyright I put the copyright notice from the
11 * frle-0.22 device driver.
12 * Some code is based on the nicstar driver by M. Welsh.
13 *
14 * Author: Rui Prior (rprior@inescn.pt)
15 * PowerPC support by Jay Talbott (jay_talbott@mcg.mot.com) April 1999
16 *
17 *
18 * (C) INESC 1999
19 */
20
21/*
22 * IMPORTANT INFORMATION
23 *
24 * There are currently three types of spinlocks:
25 *
26 * 1 - Per card interrupt spinlock (to protect structures and such)
27 * 2 - Per SCQ scq spinlock
28 * 3 - Per card resource spinlock (to access registers, etc.)
29 *
30 * These must NEVER be grabbed in reverse order.
31 *
32 */
33
34/* Header files */
35
36#include <linux/module.h>
37#include <linux/kernel.h>
38#include <linux/skbuff.h>
39#include <linux/atmdev.h>
40#include <linux/atm.h>
41#include <linux/pci.h>
42#include <linux/dma-mapping.h>
43#include <linux/types.h>
44#include <linux/string.h>
45#include <linux/delay.h>
46#include <linux/init.h>
47#include <linux/sched.h>
48#include <linux/timer.h>
49#include <linux/interrupt.h>
50#include <linux/bitops.h>
51#include <linux/slab.h>
52#include <linux/idr.h>
53#include <asm/io.h>
54#include <linux/uaccess.h>
55#include <linux/atomic.h>
56#include <linux/etherdevice.h>
57#include "nicstar.h"
58#ifdef CONFIG_ATM_NICSTAR_USE_SUNI
59#include "suni.h"
60#endif /* CONFIG_ATM_NICSTAR_USE_SUNI */
61#ifdef CONFIG_ATM_NICSTAR_USE_IDT77105
62#include "idt77105.h"
63#endif /* CONFIG_ATM_NICSTAR_USE_IDT77105 */
64
65/* Additional code */
66
67#include "nicstarmac.c"
68
69/* Configurable parameters */
70
71#undef PHY_LOOPBACK
72#undef TX_DEBUG
73#undef RX_DEBUG
74#undef GENERAL_DEBUG
75#undef EXTRA_DEBUG
76
77/* Do not touch these */
78
79#ifdef TX_DEBUG
80#define TXPRINTK(args...) printk(args)
81#else
82#define TXPRINTK(args...)
83#endif /* TX_DEBUG */
84
85#ifdef RX_DEBUG
86#define RXPRINTK(args...) printk(args)
87#else
88#define RXPRINTK(args...)
89#endif /* RX_DEBUG */
90
91#ifdef GENERAL_DEBUG
92#define PRINTK(args...) printk(args)
93#else
94#define PRINTK(args...) do {} while (0)
95#endif /* GENERAL_DEBUG */
96
97#ifdef EXTRA_DEBUG
98#define XPRINTK(args...) printk(args)
99#else
100#define XPRINTK(args...)
101#endif /* EXTRA_DEBUG */
102
103/* Macros */
104
105#define CMD_BUSY(card) (readl((card)->membase + STAT) & NS_STAT_CMDBZ)
106
107#define NS_DELAY mdelay(1)
108
109#define PTR_DIFF(a, b) ((u32)((unsigned long)(a) - (unsigned long)(b)))
110
111#ifndef ATM_SKB
112#define ATM_SKB(s) (&(s)->atm)
113#endif
114
115#define scq_virt_to_bus(scq, p) \
116 (scq->dma + ((unsigned long)(p) - (unsigned long)(scq)->org))
117
118/* Function declarations */
119
120static u32 ns_read_sram(ns_dev * card, u32 sram_address);
121static void ns_write_sram(ns_dev * card, u32 sram_address, u32 * value,
122 int count);
123static int ns_init_card(int i, struct pci_dev *pcidev);
124static void ns_init_card_error(ns_dev * card, int error);
125static scq_info *get_scq(ns_dev *card, int size, u32 scd);
126static void free_scq(ns_dev *card, scq_info * scq, struct atm_vcc *vcc);
127static void push_rxbufs(ns_dev *, struct sk_buff *);
128static irqreturn_t ns_irq_handler(int irq, void *dev_id);
129static int ns_open(struct atm_vcc *vcc);
130static void ns_close(struct atm_vcc *vcc);
131static void fill_tst(ns_dev * card, int n, vc_map * vc);
132static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb);
133static int ns_send_bh(struct atm_vcc *vcc, struct sk_buff *skb);
134static int push_scqe(ns_dev * card, vc_map * vc, scq_info * scq, ns_scqe * tbd,
135 struct sk_buff *skb, bool may_sleep);
136static void process_tsq(ns_dev * card);
137static void drain_scq(ns_dev * card, scq_info * scq, int pos);
138static void process_rsq(ns_dev * card);
139static void dequeue_rx(ns_dev * card, ns_rsqe * rsqe);
140static void recycle_rx_buf(ns_dev * card, struct sk_buff *skb);
141static void recycle_iovec_rx_bufs(ns_dev * card, struct iovec *iov, int count);
142static void recycle_iov_buf(ns_dev * card, struct sk_buff *iovb);
143static void dequeue_sm_buf(ns_dev * card, struct sk_buff *sb);
144static void dequeue_lg_buf(ns_dev * card, struct sk_buff *lb);
145static int ns_proc_read(struct atm_dev *dev, loff_t * pos, char *page);
146static int ns_ioctl(struct atm_dev *dev, unsigned int cmd, void __user * arg);
147#ifdef EXTRA_DEBUG
148static void which_list(ns_dev * card, struct sk_buff *skb);
149#endif
150static void ns_poll(struct timer_list *unused);
151static void ns_phy_put(struct atm_dev *dev, unsigned char value,
152 unsigned long addr);
153static unsigned char ns_phy_get(struct atm_dev *dev, unsigned long addr);
154
155/* Global variables */
156
157static struct ns_dev *cards[NS_MAX_CARDS];
158static unsigned num_cards;
159static const struct atmdev_ops atm_ops = {
160 .open = ns_open,
161 .close = ns_close,
162 .ioctl = ns_ioctl,
163 .send = ns_send,
164 .send_bh = ns_send_bh,
165 .phy_put = ns_phy_put,
166 .phy_get = ns_phy_get,
167 .proc_read = ns_proc_read,
168 .owner = THIS_MODULE,
169};
170
171static struct timer_list ns_timer;
172static char *mac[NS_MAX_CARDS];
173module_param_array(mac, charp, NULL, 0);
174MODULE_DESCRIPTION("ATM NIC driver for IDT 77201/77211 \"NICStAR\" and Fore ForeRunnerLE.");
175MODULE_LICENSE("GPL");
176
177/* Functions */
178
179static int nicstar_init_one(struct pci_dev *pcidev,
180 const struct pci_device_id *ent)
181{
182 static int index = -1;
183 unsigned int error;
184
185 index++;
186 cards[index] = NULL;
187
188 error = ns_init_card(index, pcidev);
189 if (error) {
190 cards[index--] = NULL; /* don't increment index */
191 goto err_out;
192 }
193
194 return 0;
195err_out:
196 return -ENODEV;
197}
198
199static void nicstar_remove_one(struct pci_dev *pcidev)
200{
201 int i, j;
202 ns_dev *card = pci_get_drvdata(pcidev);
203 struct sk_buff *hb;
204 struct sk_buff *iovb;
205 struct sk_buff *lb;
206 struct sk_buff *sb;
207
208 i = card->index;
209
210 if (cards[i] == NULL)
211 return;
212
213 if (card->atmdev->phy && card->atmdev->phy->stop)
214 card->atmdev->phy->stop(card->atmdev);
215
216 /* Stop everything */
217 writel(0x00000000, card->membase + CFG);
218
219 /* De-register device */
220 atm_dev_deregister(card->atmdev);
221
222 /* Disable PCI device */
223 pci_disable_device(pcidev);
224
225 /* Free up resources */
226 j = 0;
227 PRINTK("nicstar%d: freeing %d huge buffers.\n", i, card->hbpool.count);
228 while ((hb = skb_dequeue(&card->hbpool.queue)) != NULL) {
229 dev_kfree_skb_any(hb);
230 j++;
231 }
232 PRINTK("nicstar%d: %d huge buffers freed.\n", i, j);
233 j = 0;
234 PRINTK("nicstar%d: freeing %d iovec buffers.\n", i,
235 card->iovpool.count);
236 while ((iovb = skb_dequeue(&card->iovpool.queue)) != NULL) {
237 dev_kfree_skb_any(iovb);
238 j++;
239 }
240 PRINTK("nicstar%d: %d iovec buffers freed.\n", i, j);
241 while ((lb = skb_dequeue(&card->lbpool.queue)) != NULL)
242 dev_kfree_skb_any(lb);
243 while ((sb = skb_dequeue(&card->sbpool.queue)) != NULL)
244 dev_kfree_skb_any(sb);
245 free_scq(card, card->scq0, NULL);
246 for (j = 0; j < NS_FRSCD_NUM; j++) {
247 if (card->scd2vc[j] != NULL)
248 free_scq(card, card->scd2vc[j]->scq, card->scd2vc[j]->tx_vcc);
249 }
250 idr_destroy(&card->idr);
251 dma_free_coherent(&card->pcidev->dev, NS_RSQSIZE + NS_RSQ_ALIGNMENT,
252 card->rsq.org, card->rsq.dma);
253 dma_free_coherent(&card->pcidev->dev, NS_TSQSIZE + NS_TSQ_ALIGNMENT,
254 card->tsq.org, card->tsq.dma);
255 free_irq(card->pcidev->irq, card);
256 iounmap(card->membase);
257 kfree(card);
258}
259
260static const struct pci_device_id nicstar_pci_tbl[] = {
261 { PCI_VDEVICE(IDT, PCI_DEVICE_ID_IDT_IDT77201), 0 },
262 {0,} /* terminate list */
263};
264
265MODULE_DEVICE_TABLE(pci, nicstar_pci_tbl);
266
267static struct pci_driver nicstar_driver = {
268 .name = "nicstar",
269 .id_table = nicstar_pci_tbl,
270 .probe = nicstar_init_one,
271 .remove = nicstar_remove_one,
272};
273
274static int __init nicstar_init(void)
275{
276 unsigned error = 0; /* Initialized to remove compile warning */
277
278 XPRINTK("nicstar: nicstar_init() called.\n");
279
280 error = pci_register_driver(&nicstar_driver);
281
282 TXPRINTK("nicstar: TX debug enabled.\n");
283 RXPRINTK("nicstar: RX debug enabled.\n");
284 PRINTK("nicstar: General debug enabled.\n");
285#ifdef PHY_LOOPBACK
286 printk("nicstar: using PHY loopback.\n");
287#endif /* PHY_LOOPBACK */
288 XPRINTK("nicstar: nicstar_init() returned.\n");
289
290 if (!error) {
291 timer_setup(&ns_timer, ns_poll, 0);
292 ns_timer.expires = jiffies + NS_POLL_PERIOD;
293 add_timer(&ns_timer);
294 }
295
296 return error;
297}
298
299static void __exit nicstar_cleanup(void)
300{
301 XPRINTK("nicstar: nicstar_cleanup() called.\n");
302
303 del_timer_sync(&ns_timer);
304
305 pci_unregister_driver(&nicstar_driver);
306
307 XPRINTK("nicstar: nicstar_cleanup() returned.\n");
308}
309
310static u32 ns_read_sram(ns_dev * card, u32 sram_address)
311{
312 unsigned long flags;
313 u32 data;
314 sram_address <<= 2;
315 sram_address &= 0x0007FFFC; /* address must be dword aligned */
316 sram_address |= 0x50000000; /* SRAM read command */
317 spin_lock_irqsave(&card->res_lock, flags);
318 while (CMD_BUSY(card)) ;
319 writel(sram_address, card->membase + CMD);
320 while (CMD_BUSY(card)) ;
321 data = readl(card->membase + DR0);
322 spin_unlock_irqrestore(&card->res_lock, flags);
323 return data;
324}
325
326static void ns_write_sram(ns_dev * card, u32 sram_address, u32 * value,
327 int count)
328{
329 unsigned long flags;
330 int i, c;
331 count--; /* count range now is 0..3 instead of 1..4 */
332 c = count;
333 c <<= 2; /* to use increments of 4 */
334 spin_lock_irqsave(&card->res_lock, flags);
335 while (CMD_BUSY(card)) ;
336 for (i = 0; i <= c; i += 4)
337 writel(*(value++), card->membase + i);
338 /* Note: DR# registers are the first 4 dwords in nicstar's memspace,
339 so card->membase + DR0 == card->membase */
340 sram_address <<= 2;
341 sram_address &= 0x0007FFFC;
342 sram_address |= (0x40000000 | count);
343 writel(sram_address, card->membase + CMD);
344 spin_unlock_irqrestore(&card->res_lock, flags);
345}
346
347static int ns_init_card(int i, struct pci_dev *pcidev)
348{
349 int j;
350 struct ns_dev *card = NULL;
351 unsigned char pci_latency;
352 unsigned error;
353 u32 data;
354 u32 u32d[4];
355 u32 ns_cfg_rctsize;
356 int bcount;
357 unsigned long membase;
358
359 error = 0;
360
361 if (pci_enable_device(pcidev)) {
362 printk("nicstar%d: can't enable PCI device\n", i);
363 error = 2;
364 ns_init_card_error(card, error);
365 return error;
366 }
367 if (dma_set_mask_and_coherent(&pcidev->dev, DMA_BIT_MASK(32)) != 0) {
368 printk(KERN_WARNING
369 "nicstar%d: No suitable DMA available.\n", i);
370 error = 2;
371 ns_init_card_error(card, error);
372 return error;
373 }
374
375 card = kmalloc(sizeof(*card), GFP_KERNEL);
376 if (!card) {
377 printk
378 ("nicstar%d: can't allocate memory for device structure.\n",
379 i);
380 error = 2;
381 ns_init_card_error(card, error);
382 return error;
383 }
384 cards[i] = card;
385 spin_lock_init(&card->int_lock);
386 spin_lock_init(&card->res_lock);
387
388 pci_set_drvdata(pcidev, card);
389
390 card->index = i;
391 card->atmdev = NULL;
392 card->pcidev = pcidev;
393 membase = pci_resource_start(pcidev, 1);
394 card->membase = ioremap(membase, NS_IOREMAP_SIZE);
395 if (!card->membase) {
396 printk("nicstar%d: can't ioremap() membase.\n", i);
397 error = 3;
398 ns_init_card_error(card, error);
399 return error;
400 }
401 PRINTK("nicstar%d: membase at 0x%p.\n", i, card->membase);
402
403 pci_set_master(pcidev);
404
405 if (pci_read_config_byte(pcidev, PCI_LATENCY_TIMER, &pci_latency) != 0) {
406 printk("nicstar%d: can't read PCI latency timer.\n", i);
407 error = 6;
408 ns_init_card_error(card, error);
409 return error;
410 }
411#ifdef NS_PCI_LATENCY
412 if (pci_latency < NS_PCI_LATENCY) {
413 PRINTK("nicstar%d: setting PCI latency timer to %d.\n", i,
414 NS_PCI_LATENCY);
415 for (j = 1; j < 4; j++) {
416 if (pci_write_config_byte
417 (pcidev, PCI_LATENCY_TIMER, NS_PCI_LATENCY) != 0)
418 break;
419 }
420 if (j == 4) {
421 printk
422 ("nicstar%d: can't set PCI latency timer to %d.\n",
423 i, NS_PCI_LATENCY);
424 error = 7;
425 ns_init_card_error(card, error);
426 return error;
427 }
428 }
429#endif /* NS_PCI_LATENCY */
430
431 /* Clear timer overflow */
432 data = readl(card->membase + STAT);
433 if (data & NS_STAT_TMROF)
434 writel(NS_STAT_TMROF, card->membase + STAT);
435
436 /* Software reset */
437 writel(NS_CFG_SWRST, card->membase + CFG);
438 NS_DELAY;
439 writel(0x00000000, card->membase + CFG);
440
441 /* PHY reset */
442 writel(0x00000008, card->membase + GP);
443 NS_DELAY;
444 writel(0x00000001, card->membase + GP);
445 NS_DELAY;
446 while (CMD_BUSY(card)) ;
447 writel(NS_CMD_WRITE_UTILITY | 0x00000100, card->membase + CMD); /* Sync UTOPIA with SAR clock */
448 NS_DELAY;
449
450 /* Detect PHY type */
451 while (CMD_BUSY(card)) ;
452 writel(NS_CMD_READ_UTILITY | 0x00000200, card->membase + CMD);
453 while (CMD_BUSY(card)) ;
454 data = readl(card->membase + DR0);
455 switch (data) {
456 case 0x00000009:
457 printk("nicstar%d: PHY seems to be 25 Mbps.\n", i);
458 card->max_pcr = ATM_25_PCR;
459 while (CMD_BUSY(card)) ;
460 writel(0x00000008, card->membase + DR0);
461 writel(NS_CMD_WRITE_UTILITY | 0x00000200, card->membase + CMD);
462 /* Clear an eventual pending interrupt */
463 writel(NS_STAT_SFBQF, card->membase + STAT);
464#ifdef PHY_LOOPBACK
465 while (CMD_BUSY(card)) ;
466 writel(0x00000022, card->membase + DR0);
467 writel(NS_CMD_WRITE_UTILITY | 0x00000202, card->membase + CMD);
468#endif /* PHY_LOOPBACK */
469 break;
470 case 0x00000030:
471 case 0x00000031:
472 printk("nicstar%d: PHY seems to be 155 Mbps.\n", i);
473 card->max_pcr = ATM_OC3_PCR;
474#ifdef PHY_LOOPBACK
475 while (CMD_BUSY(card)) ;
476 writel(0x00000002, card->membase + DR0);
477 writel(NS_CMD_WRITE_UTILITY | 0x00000205, card->membase + CMD);
478#endif /* PHY_LOOPBACK */
479 break;
480 default:
481 printk("nicstar%d: unknown PHY type (0x%08X).\n", i, data);
482 error = 8;
483 ns_init_card_error(card, error);
484 return error;
485 }
486 writel(0x00000000, card->membase + GP);
487
488 /* Determine SRAM size */
489 data = 0x76543210;
490 ns_write_sram(card, 0x1C003, &data, 1);
491 data = 0x89ABCDEF;
492 ns_write_sram(card, 0x14003, &data, 1);
493 if (ns_read_sram(card, 0x14003) == 0x89ABCDEF &&
494 ns_read_sram(card, 0x1C003) == 0x76543210)
495 card->sram_size = 128;
496 else
497 card->sram_size = 32;
498 PRINTK("nicstar%d: %dK x 32bit SRAM size.\n", i, card->sram_size);
499
500 card->rct_size = NS_MAX_RCTSIZE;
501
502#if (NS_MAX_RCTSIZE == 4096)
503 if (card->sram_size == 128)
504 printk
505 ("nicstar%d: limiting maximum VCI. See NS_MAX_RCTSIZE in nicstar.h\n",
506 i);
507#elif (NS_MAX_RCTSIZE == 16384)
508 if (card->sram_size == 32) {
509 printk
510 ("nicstar%d: wasting memory. See NS_MAX_RCTSIZE in nicstar.h\n",
511 i);
512 card->rct_size = 4096;
513 }
514#else
515#error NS_MAX_RCTSIZE must be either 4096 or 16384 in nicstar.c
516#endif
517
518 card->vpibits = NS_VPIBITS;
519 if (card->rct_size == 4096)
520 card->vcibits = 12 - NS_VPIBITS;
521 else /* card->rct_size == 16384 */
522 card->vcibits = 14 - NS_VPIBITS;
523
524 /* Initialize the nicstar eeprom/eprom stuff, for the MAC addr */
525 if (mac[i] == NULL)
526 nicstar_init_eprom(card->membase);
527
528 /* Set the VPI/VCI MSb mask to zero so we can receive OAM cells */
529 writel(0x00000000, card->membase + VPM);
530
531 card->intcnt = 0;
532 if (request_irq
533 (pcidev->irq, &ns_irq_handler, IRQF_SHARED, "nicstar", card) != 0) {
534 pr_err("nicstar%d: can't allocate IRQ %d.\n", i, pcidev->irq);
535 error = 9;
536 ns_init_card_error(card, error);
537 return error;
538 }
539
540 /* Initialize TSQ */
541 card->tsq.org = dma_alloc_coherent(&card->pcidev->dev,
542 NS_TSQSIZE + NS_TSQ_ALIGNMENT,
543 &card->tsq.dma, GFP_KERNEL);
544 if (card->tsq.org == NULL) {
545 printk("nicstar%d: can't allocate TSQ.\n", i);
546 error = 10;
547 ns_init_card_error(card, error);
548 return error;
549 }
550 card->tsq.base = PTR_ALIGN(card->tsq.org, NS_TSQ_ALIGNMENT);
551 card->tsq.next = card->tsq.base;
552 card->tsq.last = card->tsq.base + (NS_TSQ_NUM_ENTRIES - 1);
553 for (j = 0; j < NS_TSQ_NUM_ENTRIES; j++)
554 ns_tsi_init(card->tsq.base + j);
555 writel(0x00000000, card->membase + TSQH);
556 writel(ALIGN(card->tsq.dma, NS_TSQ_ALIGNMENT), card->membase + TSQB);
557 PRINTK("nicstar%d: TSQ base at 0x%p.\n", i, card->tsq.base);
558
559 /* Initialize RSQ */
560 card->rsq.org = dma_alloc_coherent(&card->pcidev->dev,
561 NS_RSQSIZE + NS_RSQ_ALIGNMENT,
562 &card->rsq.dma, GFP_KERNEL);
563 if (card->rsq.org == NULL) {
564 printk("nicstar%d: can't allocate RSQ.\n", i);
565 error = 11;
566 ns_init_card_error(card, error);
567 return error;
568 }
569 card->rsq.base = PTR_ALIGN(card->rsq.org, NS_RSQ_ALIGNMENT);
570 card->rsq.next = card->rsq.base;
571 card->rsq.last = card->rsq.base + (NS_RSQ_NUM_ENTRIES - 1);
572 for (j = 0; j < NS_RSQ_NUM_ENTRIES; j++)
573 ns_rsqe_init(card->rsq.base + j);
574 writel(0x00000000, card->membase + RSQH);
575 writel(ALIGN(card->rsq.dma, NS_RSQ_ALIGNMENT), card->membase + RSQB);
576 PRINTK("nicstar%d: RSQ base at 0x%p.\n", i, card->rsq.base);
577
578 /* Initialize SCQ0, the only VBR SCQ used */
579 card->scq1 = NULL;
580 card->scq2 = NULL;
581 card->scq0 = get_scq(card, VBR_SCQSIZE, NS_VRSCD0);
582 if (card->scq0 == NULL) {
583 printk("nicstar%d: can't get SCQ0.\n", i);
584 error = 12;
585 ns_init_card_error(card, error);
586 return error;
587 }
588 u32d[0] = scq_virt_to_bus(card->scq0, card->scq0->base);
589 u32d[1] = (u32) 0x00000000;
590 u32d[2] = (u32) 0xffffffff;
591 u32d[3] = (u32) 0x00000000;
592 ns_write_sram(card, NS_VRSCD0, u32d, 4);
593 ns_write_sram(card, NS_VRSCD1, u32d, 4); /* These last two won't be used */
594 ns_write_sram(card, NS_VRSCD2, u32d, 4); /* but are initialized, just in case... */
595 card->scq0->scd = NS_VRSCD0;
596 PRINTK("nicstar%d: VBR-SCQ0 base at 0x%p.\n", i, card->scq0->base);
597
598 /* Initialize TSTs */
599 card->tst_addr = NS_TST0;
600 card->tst_free_entries = NS_TST_NUM_ENTRIES;
601 data = NS_TST_OPCODE_VARIABLE;
602 for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
603 ns_write_sram(card, NS_TST0 + j, &data, 1);
604 data = ns_tste_make(NS_TST_OPCODE_END, NS_TST0);
605 ns_write_sram(card, NS_TST0 + NS_TST_NUM_ENTRIES, &data, 1);
606 for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
607 ns_write_sram(card, NS_TST1 + j, &data, 1);
608 data = ns_tste_make(NS_TST_OPCODE_END, NS_TST1);
609 ns_write_sram(card, NS_TST1 + NS_TST_NUM_ENTRIES, &data, 1);
610 for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
611 card->tste2vc[j] = NULL;
612 writel(NS_TST0 << 2, card->membase + TSTB);
613
614 /* Initialize RCT. AAL type is set on opening the VC. */
615#ifdef RCQ_SUPPORT
616 u32d[0] = NS_RCTE_RAWCELLINTEN;
617#else
618 u32d[0] = 0x00000000;
619#endif /* RCQ_SUPPORT */
620 u32d[1] = 0x00000000;
621 u32d[2] = 0x00000000;
622 u32d[3] = 0xFFFFFFFF;
623 for (j = 0; j < card->rct_size; j++)
624 ns_write_sram(card, j * 4, u32d, 4);
625
626 memset(card->vcmap, 0, sizeof(card->vcmap));
627
628 for (j = 0; j < NS_FRSCD_NUM; j++)
629 card->scd2vc[j] = NULL;
630
631 /* Initialize buffer levels */
632 card->sbnr.min = MIN_SB;
633 card->sbnr.init = NUM_SB;
634 card->sbnr.max = MAX_SB;
635 card->lbnr.min = MIN_LB;
636 card->lbnr.init = NUM_LB;
637 card->lbnr.max = MAX_LB;
638 card->iovnr.min = MIN_IOVB;
639 card->iovnr.init = NUM_IOVB;
640 card->iovnr.max = MAX_IOVB;
641 card->hbnr.min = MIN_HB;
642 card->hbnr.init = NUM_HB;
643 card->hbnr.max = MAX_HB;
644
645 card->sm_handle = NULL;
646 card->sm_addr = 0x00000000;
647 card->lg_handle = NULL;
648 card->lg_addr = 0x00000000;
649
650 card->efbie = 1; /* To prevent push_rxbufs from enabling the interrupt */
651
652 idr_init(&card->idr);
653
654 /* Pre-allocate some huge buffers */
655 skb_queue_head_init(&card->hbpool.queue);
656 card->hbpool.count = 0;
657 for (j = 0; j < NUM_HB; j++) {
658 struct sk_buff *hb;
659 hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
660 if (hb == NULL) {
661 printk
662 ("nicstar%d: can't allocate %dth of %d huge buffers.\n",
663 i, j, NUM_HB);
664 error = 13;
665 ns_init_card_error(card, error);
666 return error;
667 }
668 NS_PRV_BUFTYPE(hb) = BUF_NONE;
669 skb_queue_tail(&card->hbpool.queue, hb);
670 card->hbpool.count++;
671 }
672
673 /* Allocate large buffers */
674 skb_queue_head_init(&card->lbpool.queue);
675 card->lbpool.count = 0; /* Not used */
676 for (j = 0; j < NUM_LB; j++) {
677 struct sk_buff *lb;
678 lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
679 if (lb == NULL) {
680 printk
681 ("nicstar%d: can't allocate %dth of %d large buffers.\n",
682 i, j, NUM_LB);
683 error = 14;
684 ns_init_card_error(card, error);
685 return error;
686 }
687 NS_PRV_BUFTYPE(lb) = BUF_LG;
688 skb_queue_tail(&card->lbpool.queue, lb);
689 skb_reserve(lb, NS_SMBUFSIZE);
690 push_rxbufs(card, lb);
691 /* Due to the implementation of push_rxbufs() this is 1, not 0 */
692 if (j == 1) {
693 card->rcbuf = lb;
694 card->rawcell = (struct ns_rcqe *) lb->data;
695 card->rawch = NS_PRV_DMA(lb);
696 }
697 }
698 /* Test for strange behaviour which leads to crashes */
699 if ((bcount =
700 ns_stat_lfbqc_get(readl(card->membase + STAT))) < card->lbnr.min) {
701 printk
702 ("nicstar%d: Strange... Just allocated %d large buffers and lfbqc = %d.\n",
703 i, j, bcount);
704 error = 14;
705 ns_init_card_error(card, error);
706 return error;
707 }
708
709 /* Allocate small buffers */
710 skb_queue_head_init(&card->sbpool.queue);
711 card->sbpool.count = 0; /* Not used */
712 for (j = 0; j < NUM_SB; j++) {
713 struct sk_buff *sb;
714 sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
715 if (sb == NULL) {
716 printk
717 ("nicstar%d: can't allocate %dth of %d small buffers.\n",
718 i, j, NUM_SB);
719 error = 15;
720 ns_init_card_error(card, error);
721 return error;
722 }
723 NS_PRV_BUFTYPE(sb) = BUF_SM;
724 skb_queue_tail(&card->sbpool.queue, sb);
725 skb_reserve(sb, NS_AAL0_HEADER);
726 push_rxbufs(card, sb);
727 }
728 /* Test for strange behaviour which leads to crashes */
729 if ((bcount =
730 ns_stat_sfbqc_get(readl(card->membase + STAT))) < card->sbnr.min) {
731 printk
732 ("nicstar%d: Strange... Just allocated %d small buffers and sfbqc = %d.\n",
733 i, j, bcount);
734 error = 15;
735 ns_init_card_error(card, error);
736 return error;
737 }
738
739 /* Allocate iovec buffers */
740 skb_queue_head_init(&card->iovpool.queue);
741 card->iovpool.count = 0;
742 for (j = 0; j < NUM_IOVB; j++) {
743 struct sk_buff *iovb;
744 iovb = alloc_skb(NS_IOVBUFSIZE, GFP_KERNEL);
745 if (iovb == NULL) {
746 printk
747 ("nicstar%d: can't allocate %dth of %d iovec buffers.\n",
748 i, j, NUM_IOVB);
749 error = 16;
750 ns_init_card_error(card, error);
751 return error;
752 }
753 NS_PRV_BUFTYPE(iovb) = BUF_NONE;
754 skb_queue_tail(&card->iovpool.queue, iovb);
755 card->iovpool.count++;
756 }
757
758 /* Configure NICStAR */
759 if (card->rct_size == 4096)
760 ns_cfg_rctsize = NS_CFG_RCTSIZE_4096_ENTRIES;
761 else /* (card->rct_size == 16384) */
762 ns_cfg_rctsize = NS_CFG_RCTSIZE_16384_ENTRIES;
763
764 card->efbie = 1;
765
766 /* Register device */
767 card->atmdev = atm_dev_register("nicstar", &card->pcidev->dev, &atm_ops,
768 -1, NULL);
769 if (card->atmdev == NULL) {
770 printk("nicstar%d: can't register device.\n", i);
771 error = 17;
772 ns_init_card_error(card, error);
773 return error;
774 }
775
776 if (mac[i] == NULL || !mac_pton(mac[i], card->atmdev->esi)) {
777 nicstar_read_eprom(card->membase, NICSTAR_EPROM_MAC_ADDR_OFFSET,
778 card->atmdev->esi, 6);
779 if (ether_addr_equal(card->atmdev->esi, "\x00\x00\x00\x00\x00\x00")) {
780 nicstar_read_eprom(card->membase,
781 NICSTAR_EPROM_MAC_ADDR_OFFSET_ALT,
782 card->atmdev->esi, 6);
783 }
784 }
785
786 printk("nicstar%d: MAC address %pM\n", i, card->atmdev->esi);
787
788 card->atmdev->dev_data = card;
789 card->atmdev->ci_range.vpi_bits = card->vpibits;
790 card->atmdev->ci_range.vci_bits = card->vcibits;
791 card->atmdev->link_rate = card->max_pcr;
792 card->atmdev->phy = NULL;
793
794#ifdef CONFIG_ATM_NICSTAR_USE_SUNI
795 if (card->max_pcr == ATM_OC3_PCR)
796 suni_init(card->atmdev);
797#endif /* CONFIG_ATM_NICSTAR_USE_SUNI */
798
799#ifdef CONFIG_ATM_NICSTAR_USE_IDT77105
800 if (card->max_pcr == ATM_25_PCR)
801 idt77105_init(card->atmdev);
802#endif /* CONFIG_ATM_NICSTAR_USE_IDT77105 */
803
804 if (card->atmdev->phy && card->atmdev->phy->start)
805 card->atmdev->phy->start(card->atmdev);
806
807 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 */
808 NS_CFG_RSQAFIE | NS_CFG_TXEN | NS_CFG_TXIE | NS_CFG_TSQFIE_OPT | /* Only enabled if ENABLE_TSQFIE */
809 NS_CFG_PHYIE, card->membase + CFG);
810
811 num_cards++;
812
813 return error;
814}
815
816static void ns_init_card_error(ns_dev *card, int error)
817{
818 if (error >= 17) {
819 writel(0x00000000, card->membase + CFG);
820 }
821 if (error >= 16) {
822 struct sk_buff *iovb;
823 while ((iovb = skb_dequeue(&card->iovpool.queue)) != NULL)
824 dev_kfree_skb_any(iovb);
825 }
826 if (error >= 15) {
827 struct sk_buff *sb;
828 while ((sb = skb_dequeue(&card->sbpool.queue)) != NULL)
829 dev_kfree_skb_any(sb);
830 free_scq(card, card->scq0, NULL);
831 }
832 if (error >= 14) {
833 struct sk_buff *lb;
834 while ((lb = skb_dequeue(&card->lbpool.queue)) != NULL)
835 dev_kfree_skb_any(lb);
836 }
837 if (error >= 13) {
838 struct sk_buff *hb;
839 while ((hb = skb_dequeue(&card->hbpool.queue)) != NULL)
840 dev_kfree_skb_any(hb);
841 }
842 if (error >= 12) {
843 dma_free_coherent(&card->pcidev->dev, NS_RSQSIZE + NS_RSQ_ALIGNMENT,
844 card->rsq.org, card->rsq.dma);
845 }
846 if (error >= 11) {
847 dma_free_coherent(&card->pcidev->dev, NS_TSQSIZE + NS_TSQ_ALIGNMENT,
848 card->tsq.org, card->tsq.dma);
849 }
850 if (error >= 10) {
851 free_irq(card->pcidev->irq, card);
852 }
853 if (error >= 4) {
854 iounmap(card->membase);
855 }
856 if (error >= 3) {
857 pci_disable_device(card->pcidev);
858 kfree(card);
859 }
860}
861
862static scq_info *get_scq(ns_dev *card, int size, u32 scd)
863{
864 scq_info *scq;
865
866 if (size != VBR_SCQSIZE && size != CBR_SCQSIZE)
867 return NULL;
868
869 scq = kmalloc(sizeof(*scq), GFP_KERNEL);
870 if (!scq)
871 return NULL;
872 scq->org = dma_alloc_coherent(&card->pcidev->dev,
873 2 * size, &scq->dma, GFP_KERNEL);
874 if (!scq->org) {
875 kfree(scq);
876 return NULL;
877 }
878 scq->skb = kcalloc(size / NS_SCQE_SIZE, sizeof(*scq->skb),
879 GFP_KERNEL);
880 if (!scq->skb) {
881 dma_free_coherent(&card->pcidev->dev,
882 2 * size, scq->org, scq->dma);
883 kfree(scq);
884 return NULL;
885 }
886 scq->num_entries = size / NS_SCQE_SIZE;
887 scq->base = PTR_ALIGN(scq->org, size);
888 scq->next = scq->base;
889 scq->last = scq->base + (scq->num_entries - 1);
890 scq->tail = scq->last;
891 scq->scd = scd;
892 scq->tbd_count = 0;
893 init_waitqueue_head(&scq->scqfull_waitq);
894 scq->full = 0;
895 spin_lock_init(&scq->lock);
896
897 return scq;
898}
899
900/* For variable rate SCQ vcc must be NULL */
901static void free_scq(ns_dev *card, scq_info *scq, struct atm_vcc *vcc)
902{
903 int i;
904
905 if (scq->num_entries == VBR_SCQ_NUM_ENTRIES)
906 for (i = 0; i < scq->num_entries; i++) {
907 if (scq->skb[i] != NULL) {
908 vcc = ATM_SKB(scq->skb[i])->vcc;
909 if (vcc->pop != NULL)
910 vcc->pop(vcc, scq->skb[i]);
911 else
912 dev_kfree_skb_any(scq->skb[i]);
913 }
914 } else { /* vcc must be != NULL */
915
916 if (vcc == NULL) {
917 printk
918 ("nicstar: free_scq() called with vcc == NULL for fixed rate scq.");
919 for (i = 0; i < scq->num_entries; i++)
920 dev_kfree_skb_any(scq->skb[i]);
921 } else
922 for (i = 0; i < scq->num_entries; i++) {
923 if (scq->skb[i] != NULL) {
924 if (vcc->pop != NULL)
925 vcc->pop(vcc, scq->skb[i]);
926 else
927 dev_kfree_skb_any(scq->skb[i]);
928 }
929 }
930 }
931 kfree(scq->skb);
932 dma_free_coherent(&card->pcidev->dev,
933 2 * (scq->num_entries == VBR_SCQ_NUM_ENTRIES ?
934 VBR_SCQSIZE : CBR_SCQSIZE),
935 scq->org, scq->dma);
936 kfree(scq);
937}
938
939/* The handles passed must be pointers to the sk_buff containing the small
940 or large buffer(s) cast to u32. */
941static void push_rxbufs(ns_dev * card, struct sk_buff *skb)
942{
943 struct sk_buff *handle1, *handle2;
944 int id1, id2;
945 u32 addr1, addr2;
946 u32 stat;
947 unsigned long flags;
948
949 /* *BARF* */
950 handle2 = NULL;
951 addr2 = 0;
952 handle1 = skb;
953 addr1 = dma_map_single(&card->pcidev->dev,
954 skb->data,
955 (NS_PRV_BUFTYPE(skb) == BUF_SM
956 ? NS_SMSKBSIZE : NS_LGSKBSIZE),
957 DMA_TO_DEVICE);
958 NS_PRV_DMA(skb) = addr1; /* save so we can unmap later */
959
960#ifdef GENERAL_DEBUG
961 if (!addr1)
962 printk("nicstar%d: push_rxbufs called with addr1 = 0.\n",
963 card->index);
964#endif /* GENERAL_DEBUG */
965
966 stat = readl(card->membase + STAT);
967 card->sbfqc = ns_stat_sfbqc_get(stat);
968 card->lbfqc = ns_stat_lfbqc_get(stat);
969 if (NS_PRV_BUFTYPE(skb) == BUF_SM) {
970 if (!addr2) {
971 if (card->sm_addr) {
972 addr2 = card->sm_addr;
973 handle2 = card->sm_handle;
974 card->sm_addr = 0x00000000;
975 card->sm_handle = NULL;
976 } else { /* (!sm_addr) */
977
978 card->sm_addr = addr1;
979 card->sm_handle = handle1;
980 }
981 }
982 } else { /* buf_type == BUF_LG */
983
984 if (!addr2) {
985 if (card->lg_addr) {
986 addr2 = card->lg_addr;
987 handle2 = card->lg_handle;
988 card->lg_addr = 0x00000000;
989 card->lg_handle = NULL;
990 } else { /* (!lg_addr) */
991
992 card->lg_addr = addr1;
993 card->lg_handle = handle1;
994 }
995 }
996 }
997
998 if (addr2) {
999 if (NS_PRV_BUFTYPE(skb) == BUF_SM) {
1000 if (card->sbfqc >= card->sbnr.max) {
1001 skb_unlink(handle1, &card->sbpool.queue);
1002 dev_kfree_skb_any(handle1);
1003 skb_unlink(handle2, &card->sbpool.queue);
1004 dev_kfree_skb_any(handle2);
1005 return;
1006 } else
1007 card->sbfqc += 2;
1008 } else { /* (buf_type == BUF_LG) */
1009
1010 if (card->lbfqc >= card->lbnr.max) {
1011 skb_unlink(handle1, &card->lbpool.queue);
1012 dev_kfree_skb_any(handle1);
1013 skb_unlink(handle2, &card->lbpool.queue);
1014 dev_kfree_skb_any(handle2);
1015 return;
1016 } else
1017 card->lbfqc += 2;
1018 }
1019
1020 id1 = idr_alloc(&card->idr, handle1, 0, 0, GFP_ATOMIC);
1021 if (id1 < 0)
1022 goto out;
1023
1024 id2 = idr_alloc(&card->idr, handle2, 0, 0, GFP_ATOMIC);
1025 if (id2 < 0)
1026 goto out;
1027
1028 spin_lock_irqsave(&card->res_lock, flags);
1029 while (CMD_BUSY(card)) ;
1030 writel(addr2, card->membase + DR3);
1031 writel(id2, card->membase + DR2);
1032 writel(addr1, card->membase + DR1);
1033 writel(id1, card->membase + DR0);
1034 writel(NS_CMD_WRITE_FREEBUFQ | NS_PRV_BUFTYPE(skb),
1035 card->membase + CMD);
1036 spin_unlock_irqrestore(&card->res_lock, flags);
1037
1038 XPRINTK("nicstar%d: Pushing %s buffers at 0x%x and 0x%x.\n",
1039 card->index,
1040 (NS_PRV_BUFTYPE(skb) == BUF_SM ? "small" : "large"),
1041 addr1, addr2);
1042 }
1043
1044 if (!card->efbie && card->sbfqc >= card->sbnr.min &&
1045 card->lbfqc >= card->lbnr.min) {
1046 card->efbie = 1;
1047 writel((readl(card->membase + CFG) | NS_CFG_EFBIE),
1048 card->membase + CFG);
1049 }
1050
1051out:
1052 return;
1053}
1054
1055static irqreturn_t ns_irq_handler(int irq, void *dev_id)
1056{
1057 u32 stat_r;
1058 ns_dev *card;
1059 struct atm_dev *dev;
1060 unsigned long flags;
1061
1062 card = (ns_dev *) dev_id;
1063 dev = card->atmdev;
1064 card->intcnt++;
1065
1066 PRINTK("nicstar%d: NICStAR generated an interrupt\n", card->index);
1067
1068 spin_lock_irqsave(&card->int_lock, flags);
1069
1070 stat_r = readl(card->membase + STAT);
1071
1072 /* Transmit Status Indicator has been written to T. S. Queue */
1073 if (stat_r & NS_STAT_TSIF) {
1074 TXPRINTK("nicstar%d: TSI interrupt\n", card->index);
1075 process_tsq(card);
1076 writel(NS_STAT_TSIF, card->membase + STAT);
1077 }
1078
1079 /* Incomplete CS-PDU has been transmitted */
1080 if (stat_r & NS_STAT_TXICP) {
1081 writel(NS_STAT_TXICP, card->membase + STAT);
1082 TXPRINTK("nicstar%d: Incomplete CS-PDU transmitted.\n",
1083 card->index);
1084 }
1085
1086 /* Transmit Status Queue 7/8 full */
1087 if (stat_r & NS_STAT_TSQF) {
1088 writel(NS_STAT_TSQF, card->membase + STAT);
1089 PRINTK("nicstar%d: TSQ full.\n", card->index);
1090 process_tsq(card);
1091 }
1092
1093 /* Timer overflow */
1094 if (stat_r & NS_STAT_TMROF) {
1095 writel(NS_STAT_TMROF, card->membase + STAT);
1096 PRINTK("nicstar%d: Timer overflow.\n", card->index);
1097 }
1098
1099 /* PHY device interrupt signal active */
1100 if (stat_r & NS_STAT_PHYI) {
1101 writel(NS_STAT_PHYI, card->membase + STAT);
1102 PRINTK("nicstar%d: PHY interrupt.\n", card->index);
1103 if (dev->phy && dev->phy->interrupt) {
1104 dev->phy->interrupt(dev);
1105 }
1106 }
1107
1108 /* Small Buffer Queue is full */
1109 if (stat_r & NS_STAT_SFBQF) {
1110 writel(NS_STAT_SFBQF, card->membase + STAT);
1111 printk("nicstar%d: Small free buffer queue is full.\n",
1112 card->index);
1113 }
1114
1115 /* Large Buffer Queue is full */
1116 if (stat_r & NS_STAT_LFBQF) {
1117 writel(NS_STAT_LFBQF, card->membase + STAT);
1118 printk("nicstar%d: Large free buffer queue is full.\n",
1119 card->index);
1120 }
1121
1122 /* Receive Status Queue is full */
1123 if (stat_r & NS_STAT_RSQF) {
1124 writel(NS_STAT_RSQF, card->membase + STAT);
1125 printk("nicstar%d: RSQ full.\n", card->index);
1126 process_rsq(card);
1127 }
1128
1129 /* Complete CS-PDU received */
1130 if (stat_r & NS_STAT_EOPDU) {
1131 RXPRINTK("nicstar%d: End of CS-PDU received.\n", card->index);
1132 process_rsq(card);
1133 writel(NS_STAT_EOPDU, card->membase + STAT);
1134 }
1135
1136 /* Raw cell received */
1137 if (stat_r & NS_STAT_RAWCF) {
1138 writel(NS_STAT_RAWCF, card->membase + STAT);
1139#ifndef RCQ_SUPPORT
1140 printk("nicstar%d: Raw cell received and no support yet...\n",
1141 card->index);
1142#endif /* RCQ_SUPPORT */
1143 /* NOTE: the following procedure may keep a raw cell pending until the
1144 next interrupt. As this preliminary support is only meant to
1145 avoid buffer leakage, this is not an issue. */
1146 while (readl(card->membase + RAWCT) != card->rawch) {
1147
1148 if (ns_rcqe_islast(card->rawcell)) {
1149 struct sk_buff *oldbuf;
1150
1151 oldbuf = card->rcbuf;
1152 card->rcbuf = idr_find(&card->idr,
1153 ns_rcqe_nextbufhandle(card->rawcell));
1154 card->rawch = NS_PRV_DMA(card->rcbuf);
1155 card->rawcell = (struct ns_rcqe *)
1156 card->rcbuf->data;
1157 recycle_rx_buf(card, oldbuf);
1158 } else {
1159 card->rawch += NS_RCQE_SIZE;
1160 card->rawcell++;
1161 }
1162 }
1163 }
1164
1165 /* Small buffer queue is empty */
1166 if (stat_r & NS_STAT_SFBQE) {
1167 int i;
1168 struct sk_buff *sb;
1169
1170 writel(NS_STAT_SFBQE, card->membase + STAT);
1171 printk("nicstar%d: Small free buffer queue empty.\n",
1172 card->index);
1173 for (i = 0; i < card->sbnr.min; i++) {
1174 sb = dev_alloc_skb(NS_SMSKBSIZE);
1175 if (sb == NULL) {
1176 writel(readl(card->membase + CFG) &
1177 ~NS_CFG_EFBIE, card->membase + CFG);
1178 card->efbie = 0;
1179 break;
1180 }
1181 NS_PRV_BUFTYPE(sb) = BUF_SM;
1182 skb_queue_tail(&card->sbpool.queue, sb);
1183 skb_reserve(sb, NS_AAL0_HEADER);
1184 push_rxbufs(card, sb);
1185 }
1186 card->sbfqc = i;
1187 process_rsq(card);
1188 }
1189
1190 /* Large buffer queue empty */
1191 if (stat_r & NS_STAT_LFBQE) {
1192 int i;
1193 struct sk_buff *lb;
1194
1195 writel(NS_STAT_LFBQE, card->membase + STAT);
1196 printk("nicstar%d: Large free buffer queue empty.\n",
1197 card->index);
1198 for (i = 0; i < card->lbnr.min; i++) {
1199 lb = dev_alloc_skb(NS_LGSKBSIZE);
1200 if (lb == NULL) {
1201 writel(readl(card->membase + CFG) &
1202 ~NS_CFG_EFBIE, card->membase + CFG);
1203 card->efbie = 0;
1204 break;
1205 }
1206 NS_PRV_BUFTYPE(lb) = BUF_LG;
1207 skb_queue_tail(&card->lbpool.queue, lb);
1208 skb_reserve(lb, NS_SMBUFSIZE);
1209 push_rxbufs(card, lb);
1210 }
1211 card->lbfqc = i;
1212 process_rsq(card);
1213 }
1214
1215 /* Receive Status Queue is 7/8 full */
1216 if (stat_r & NS_STAT_RSQAF) {
1217 writel(NS_STAT_RSQAF, card->membase + STAT);
1218 RXPRINTK("nicstar%d: RSQ almost full.\n", card->index);
1219 process_rsq(card);
1220 }
1221
1222 spin_unlock_irqrestore(&card->int_lock, flags);
1223 PRINTK("nicstar%d: end of interrupt service\n", card->index);
1224 return IRQ_HANDLED;
1225}
1226
1227static int ns_open(struct atm_vcc *vcc)
1228{
1229 ns_dev *card;
1230 vc_map *vc;
1231 unsigned long tmpl, modl;
1232 int tcr, tcra; /* target cell rate, and absolute value */
1233 int n = 0; /* Number of entries in the TST. Initialized to remove
1234 the compiler warning. */
1235 u32 u32d[4];
1236 int frscdi = 0; /* Index of the SCD. Initialized to remove the compiler
1237 warning. How I wish compilers were clever enough to
1238 tell which variables can truly be used
1239 uninitialized... */
1240 int inuse; /* tx or rx vc already in use by another vcc */
1241 short vpi = vcc->vpi;
1242 int vci = vcc->vci;
1243
1244 card = (ns_dev *) vcc->dev->dev_data;
1245 PRINTK("nicstar%d: opening vpi.vci %d.%d \n", card->index, (int)vpi,
1246 vci);
1247 if (vcc->qos.aal != ATM_AAL5 && vcc->qos.aal != ATM_AAL0) {
1248 PRINTK("nicstar%d: unsupported AAL.\n", card->index);
1249 return -EINVAL;
1250 }
1251
1252 vc = &(card->vcmap[vpi << card->vcibits | vci]);
1253 vcc->dev_data = vc;
1254
1255 inuse = 0;
1256 if (vcc->qos.txtp.traffic_class != ATM_NONE && vc->tx)
1257 inuse = 1;
1258 if (vcc->qos.rxtp.traffic_class != ATM_NONE && vc->rx)
1259 inuse += 2;
1260 if (inuse) {
1261 printk("nicstar%d: %s vci already in use.\n", card->index,
1262 inuse == 1 ? "tx" : inuse == 2 ? "rx" : "tx and rx");
1263 return -EINVAL;
1264 }
1265
1266 set_bit(ATM_VF_ADDR, &vcc->flags);
1267
1268 /* NOTE: You are not allowed to modify an open connection's QOS. To change
1269 that, remove the ATM_VF_PARTIAL flag checking. There may be other changes
1270 needed to do that. */
1271 if (!test_bit(ATM_VF_PARTIAL, &vcc->flags)) {
1272 scq_info *scq;
1273
1274 set_bit(ATM_VF_PARTIAL, &vcc->flags);
1275 if (vcc->qos.txtp.traffic_class == ATM_CBR) {
1276 /* Check requested cell rate and availability of SCD */
1277 if (vcc->qos.txtp.max_pcr == 0 && vcc->qos.txtp.pcr == 0
1278 && vcc->qos.txtp.min_pcr == 0) {
1279 PRINTK
1280 ("nicstar%d: trying to open a CBR vc with cell rate = 0 \n",
1281 card->index);
1282 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1283 clear_bit(ATM_VF_ADDR, &vcc->flags);
1284 return -EINVAL;
1285 }
1286
1287 tcr = atm_pcr_goal(&(vcc->qos.txtp));
1288 tcra = tcr >= 0 ? tcr : -tcr;
1289
1290 PRINTK("nicstar%d: target cell rate = %d.\n",
1291 card->index, vcc->qos.txtp.max_pcr);
1292
1293 tmpl =
1294 (unsigned long)tcra *(unsigned long)
1295 NS_TST_NUM_ENTRIES;
1296 modl = tmpl % card->max_pcr;
1297
1298 n = (int)(tmpl / card->max_pcr);
1299 if (tcr > 0) {
1300 if (modl > 0)
1301 n++;
1302 } else if (tcr == 0) {
1303 if ((n =
1304 (card->tst_free_entries -
1305 NS_TST_RESERVED)) <= 0) {
1306 PRINTK
1307 ("nicstar%d: no CBR bandwidth free.\n",
1308 card->index);
1309 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1310 clear_bit(ATM_VF_ADDR, &vcc->flags);
1311 return -EINVAL;
1312 }
1313 }
1314
1315 if (n == 0) {
1316 printk
1317 ("nicstar%d: selected bandwidth < granularity.\n",
1318 card->index);
1319 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1320 clear_bit(ATM_VF_ADDR, &vcc->flags);
1321 return -EINVAL;
1322 }
1323
1324 if (n > (card->tst_free_entries - NS_TST_RESERVED)) {
1325 PRINTK
1326 ("nicstar%d: not enough free CBR bandwidth.\n",
1327 card->index);
1328 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1329 clear_bit(ATM_VF_ADDR, &vcc->flags);
1330 return -EINVAL;
1331 } else
1332 card->tst_free_entries -= n;
1333
1334 XPRINTK("nicstar%d: writing %d tst entries.\n",
1335 card->index, n);
1336 for (frscdi = 0; frscdi < NS_FRSCD_NUM; frscdi++) {
1337 if (card->scd2vc[frscdi] == NULL) {
1338 card->scd2vc[frscdi] = vc;
1339 break;
1340 }
1341 }
1342 if (frscdi == NS_FRSCD_NUM) {
1343 PRINTK
1344 ("nicstar%d: no SCD available for CBR channel.\n",
1345 card->index);
1346 card->tst_free_entries += n;
1347 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1348 clear_bit(ATM_VF_ADDR, &vcc->flags);
1349 return -EBUSY;
1350 }
1351
1352 vc->cbr_scd = NS_FRSCD + frscdi * NS_FRSCD_SIZE;
1353
1354 scq = get_scq(card, CBR_SCQSIZE, vc->cbr_scd);
1355 if (scq == NULL) {
1356 PRINTK("nicstar%d: can't get fixed rate SCQ.\n",
1357 card->index);
1358 card->scd2vc[frscdi] = NULL;
1359 card->tst_free_entries += n;
1360 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1361 clear_bit(ATM_VF_ADDR, &vcc->flags);
1362 return -ENOMEM;
1363 }
1364 vc->scq = scq;
1365 u32d[0] = scq_virt_to_bus(scq, scq->base);
1366 u32d[1] = (u32) 0x00000000;
1367 u32d[2] = (u32) 0xffffffff;
1368 u32d[3] = (u32) 0x00000000;
1369 ns_write_sram(card, vc->cbr_scd, u32d, 4);
1370
1371 fill_tst(card, n, vc);
1372 } else if (vcc->qos.txtp.traffic_class == ATM_UBR) {
1373 vc->cbr_scd = 0x00000000;
1374 vc->scq = card->scq0;
1375 }
1376
1377 if (vcc->qos.txtp.traffic_class != ATM_NONE) {
1378 vc->tx = 1;
1379 vc->tx_vcc = vcc;
1380 vc->tbd_count = 0;
1381 }
1382 if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
1383 u32 status;
1384
1385 vc->rx = 1;
1386 vc->rx_vcc = vcc;
1387 vc->rx_iov = NULL;
1388
1389 /* Open the connection in hardware */
1390 if (vcc->qos.aal == ATM_AAL5)
1391 status = NS_RCTE_AAL5 | NS_RCTE_CONNECTOPEN;
1392 else /* vcc->qos.aal == ATM_AAL0 */
1393 status = NS_RCTE_AAL0 | NS_RCTE_CONNECTOPEN;
1394#ifdef RCQ_SUPPORT
1395 status |= NS_RCTE_RAWCELLINTEN;
1396#endif /* RCQ_SUPPORT */
1397 ns_write_sram(card,
1398 NS_RCT +
1399 (vpi << card->vcibits | vci) *
1400 NS_RCT_ENTRY_SIZE, &status, 1);
1401 }
1402
1403 }
1404
1405 set_bit(ATM_VF_READY, &vcc->flags);
1406 return 0;
1407}
1408
1409static void ns_close(struct atm_vcc *vcc)
1410{
1411 vc_map *vc;
1412 ns_dev *card;
1413 u32 data;
1414 int i;
1415
1416 vc = vcc->dev_data;
1417 card = vcc->dev->dev_data;
1418 PRINTK("nicstar%d: closing vpi.vci %d.%d \n", card->index,
1419 (int)vcc->vpi, vcc->vci);
1420
1421 clear_bit(ATM_VF_READY, &vcc->flags);
1422
1423 if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
1424 u32 addr;
1425 unsigned long flags;
1426
1427 addr =
1428 NS_RCT +
1429 (vcc->vpi << card->vcibits | vcc->vci) * NS_RCT_ENTRY_SIZE;
1430 spin_lock_irqsave(&card->res_lock, flags);
1431 while (CMD_BUSY(card)) ;
1432 writel(NS_CMD_CLOSE_CONNECTION | addr << 2,
1433 card->membase + CMD);
1434 spin_unlock_irqrestore(&card->res_lock, flags);
1435
1436 vc->rx = 0;
1437 if (vc->rx_iov != NULL) {
1438 struct sk_buff *iovb;
1439 u32 stat;
1440
1441 stat = readl(card->membase + STAT);
1442 card->sbfqc = ns_stat_sfbqc_get(stat);
1443 card->lbfqc = ns_stat_lfbqc_get(stat);
1444
1445 PRINTK
1446 ("nicstar%d: closing a VC with pending rx buffers.\n",
1447 card->index);
1448 iovb = vc->rx_iov;
1449 recycle_iovec_rx_bufs(card, (struct iovec *)iovb->data,
1450 NS_PRV_IOVCNT(iovb));
1451 NS_PRV_IOVCNT(iovb) = 0;
1452 spin_lock_irqsave(&card->int_lock, flags);
1453 recycle_iov_buf(card, iovb);
1454 spin_unlock_irqrestore(&card->int_lock, flags);
1455 vc->rx_iov = NULL;
1456 }
1457 }
1458
1459 if (vcc->qos.txtp.traffic_class != ATM_NONE) {
1460 vc->tx = 0;
1461 }
1462
1463 if (vcc->qos.txtp.traffic_class == ATM_CBR) {
1464 unsigned long flags;
1465 ns_scqe *scqep;
1466 scq_info *scq;
1467
1468 scq = vc->scq;
1469
1470 for (;;) {
1471 spin_lock_irqsave(&scq->lock, flags);
1472 scqep = scq->next;
1473 if (scqep == scq->base)
1474 scqep = scq->last;
1475 else
1476 scqep--;
1477 if (scqep == scq->tail) {
1478 spin_unlock_irqrestore(&scq->lock, flags);
1479 break;
1480 }
1481 /* If the last entry is not a TSR, place one in the SCQ in order to
1482 be able to completely drain it and then close. */
1483 if (!ns_scqe_is_tsr(scqep) && scq->tail != scq->next) {
1484 ns_scqe tsr;
1485 u32 scdi, scqi;
1486 u32 data;
1487 int index;
1488
1489 tsr.word_1 = ns_tsr_mkword_1(NS_TSR_INTENABLE);
1490 scdi = (vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE;
1491 scqi = scq->next - scq->base;
1492 tsr.word_2 = ns_tsr_mkword_2(scdi, scqi);
1493 tsr.word_3 = 0x00000000;
1494 tsr.word_4 = 0x00000000;
1495 *scq->next = tsr;
1496 index = (int)scqi;
1497 scq->skb[index] = NULL;
1498 if (scq->next == scq->last)
1499 scq->next = scq->base;
1500 else
1501 scq->next++;
1502 data = scq_virt_to_bus(scq, scq->next);
1503 ns_write_sram(card, scq->scd, &data, 1);
1504 }
1505 spin_unlock_irqrestore(&scq->lock, flags);
1506 schedule();
1507 }
1508
1509 /* Free all TST entries */
1510 data = NS_TST_OPCODE_VARIABLE;
1511 for (i = 0; i < NS_TST_NUM_ENTRIES; i++) {
1512 if (card->tste2vc[i] == vc) {
1513 ns_write_sram(card, card->tst_addr + i, &data,
1514 1);
1515 card->tste2vc[i] = NULL;
1516 card->tst_free_entries++;
1517 }
1518 }
1519
1520 card->scd2vc[(vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE] = NULL;
1521 free_scq(card, vc->scq, vcc);
1522 }
1523
1524 /* remove all references to vcc before deleting it */
1525 if (vcc->qos.txtp.traffic_class != ATM_NONE) {
1526 unsigned long flags;
1527 scq_info *scq = card->scq0;
1528
1529 spin_lock_irqsave(&scq->lock, flags);
1530
1531 for (i = 0; i < scq->num_entries; i++) {
1532 if (scq->skb[i] && ATM_SKB(scq->skb[i])->vcc == vcc) {
1533 ATM_SKB(scq->skb[i])->vcc = NULL;
1534 atm_return(vcc, scq->skb[i]->truesize);
1535 PRINTK
1536 ("nicstar: deleted pending vcc mapping\n");
1537 }
1538 }
1539
1540 spin_unlock_irqrestore(&scq->lock, flags);
1541 }
1542
1543 vcc->dev_data = NULL;
1544 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1545 clear_bit(ATM_VF_ADDR, &vcc->flags);
1546
1547#ifdef RX_DEBUG
1548 {
1549 u32 stat, cfg;
1550 stat = readl(card->membase + STAT);
1551 cfg = readl(card->membase + CFG);
1552 printk("STAT = 0x%08X CFG = 0x%08X \n", stat, cfg);
1553 printk
1554 ("TSQ: base = 0x%p next = 0x%p last = 0x%p TSQT = 0x%08X \n",
1555 card->tsq.base, card->tsq.next,
1556 card->tsq.last, readl(card->membase + TSQT));
1557 printk
1558 ("RSQ: base = 0x%p next = 0x%p last = 0x%p RSQT = 0x%08X \n",
1559 card->rsq.base, card->rsq.next,
1560 card->rsq.last, readl(card->membase + RSQT));
1561 printk("Empty free buffer queue interrupt %s \n",
1562 card->efbie ? "enabled" : "disabled");
1563 printk("SBCNT = %d count = %d LBCNT = %d count = %d \n",
1564 ns_stat_sfbqc_get(stat), card->sbpool.count,
1565 ns_stat_lfbqc_get(stat), card->lbpool.count);
1566 printk("hbpool.count = %d iovpool.count = %d \n",
1567 card->hbpool.count, card->iovpool.count);
1568 }
1569#endif /* RX_DEBUG */
1570}
1571
1572static void fill_tst(ns_dev * card, int n, vc_map * vc)
1573{
1574 u32 new_tst;
1575 unsigned long cl;
1576 int e, r;
1577 u32 data;
1578
1579 /* It would be very complicated to keep the two TSTs synchronized while
1580 assuring that writes are only made to the inactive TST. So, for now I
1581 will use only one TST. If problems occur, I will change this again */
1582
1583 new_tst = card->tst_addr;
1584
1585 /* Fill procedure */
1586
1587 for (e = 0; e < NS_TST_NUM_ENTRIES; e++) {
1588 if (card->tste2vc[e] == NULL)
1589 break;
1590 }
1591 if (e == NS_TST_NUM_ENTRIES) {
1592 printk("nicstar%d: No free TST entries found. \n", card->index);
1593 return;
1594 }
1595
1596 r = n;
1597 cl = NS_TST_NUM_ENTRIES;
1598 data = ns_tste_make(NS_TST_OPCODE_FIXED, vc->cbr_scd);
1599
1600 while (r > 0) {
1601 if (cl >= NS_TST_NUM_ENTRIES && card->tste2vc[e] == NULL) {
1602 card->tste2vc[e] = vc;
1603 ns_write_sram(card, new_tst + e, &data, 1);
1604 cl -= NS_TST_NUM_ENTRIES;
1605 r--;
1606 }
1607
1608 if (++e == NS_TST_NUM_ENTRIES) {
1609 e = 0;
1610 }
1611 cl += n;
1612 }
1613
1614 /* End of fill procedure */
1615
1616 data = ns_tste_make(NS_TST_OPCODE_END, new_tst);
1617 ns_write_sram(card, new_tst + NS_TST_NUM_ENTRIES, &data, 1);
1618 ns_write_sram(card, card->tst_addr + NS_TST_NUM_ENTRIES, &data, 1);
1619 card->tst_addr = new_tst;
1620}
1621
1622static int _ns_send(struct atm_vcc *vcc, struct sk_buff *skb, bool may_sleep)
1623{
1624 ns_dev *card;
1625 vc_map *vc;
1626 scq_info *scq;
1627 unsigned long buflen;
1628 ns_scqe scqe;
1629 u32 flags; /* TBD flags, not CPU flags */
1630
1631 card = vcc->dev->dev_data;
1632 TXPRINTK("nicstar%d: ns_send() called.\n", card->index);
1633 if ((vc = (vc_map *) vcc->dev_data) == NULL) {
1634 printk("nicstar%d: vcc->dev_data == NULL on ns_send().\n",
1635 card->index);
1636 atomic_inc(&vcc->stats->tx_err);
1637 dev_kfree_skb_any(skb);
1638 return -EINVAL;
1639 }
1640
1641 if (!vc->tx) {
1642 printk("nicstar%d: Trying to transmit on a non-tx VC.\n",
1643 card->index);
1644 atomic_inc(&vcc->stats->tx_err);
1645 dev_kfree_skb_any(skb);
1646 return -EINVAL;
1647 }
1648
1649 if (vcc->qos.aal != ATM_AAL5 && vcc->qos.aal != ATM_AAL0) {
1650 printk("nicstar%d: Only AAL0 and AAL5 are supported.\n",
1651 card->index);
1652 atomic_inc(&vcc->stats->tx_err);
1653 dev_kfree_skb_any(skb);
1654 return -EINVAL;
1655 }
1656
1657 if (skb_shinfo(skb)->nr_frags != 0) {
1658 printk("nicstar%d: No scatter-gather yet.\n", card->index);
1659 atomic_inc(&vcc->stats->tx_err);
1660 dev_kfree_skb_any(skb);
1661 return -EINVAL;
1662 }
1663
1664 ATM_SKB(skb)->vcc = vcc;
1665
1666 NS_PRV_DMA(skb) = dma_map_single(&card->pcidev->dev, skb->data,
1667 skb->len, DMA_TO_DEVICE);
1668
1669 if (vcc->qos.aal == ATM_AAL5) {
1670 buflen = (skb->len + 47 + 8) / 48 * 48; /* Multiple of 48 */
1671 flags = NS_TBD_AAL5;
1672 scqe.word_2 = cpu_to_le32(NS_PRV_DMA(skb));
1673 scqe.word_3 = cpu_to_le32(skb->len);
1674 scqe.word_4 =
1675 ns_tbd_mkword_4(0, (u32) vcc->vpi, (u32) vcc->vci, 0,
1676 ATM_SKB(skb)->
1677 atm_options & ATM_ATMOPT_CLP ? 1 : 0);
1678 flags |= NS_TBD_EOPDU;
1679 } else { /* (vcc->qos.aal == ATM_AAL0) */
1680
1681 buflen = ATM_CELL_PAYLOAD; /* i.e., 48 bytes */
1682 flags = NS_TBD_AAL0;
1683 scqe.word_2 = cpu_to_le32(NS_PRV_DMA(skb) + NS_AAL0_HEADER);
1684 scqe.word_3 = cpu_to_le32(0x00000000);
1685 if (*skb->data & 0x02) /* Payload type 1 - end of pdu */
1686 flags |= NS_TBD_EOPDU;
1687 scqe.word_4 =
1688 cpu_to_le32(*((u32 *) skb->data) & ~NS_TBD_VC_MASK);
1689 /* Force the VPI/VCI to be the same as in VCC struct */
1690 scqe.word_4 |=
1691 cpu_to_le32((((u32) vcc->
1692 vpi) << NS_TBD_VPI_SHIFT | ((u32) vcc->
1693 vci) <<
1694 NS_TBD_VCI_SHIFT) & NS_TBD_VC_MASK);
1695 }
1696
1697 if (vcc->qos.txtp.traffic_class == ATM_CBR) {
1698 scqe.word_1 = ns_tbd_mkword_1_novbr(flags, (u32) buflen);
1699 scq = ((vc_map *) vcc->dev_data)->scq;
1700 } else {
1701 scqe.word_1 =
1702 ns_tbd_mkword_1(flags, (u32) 1, (u32) 1, (u32) buflen);
1703 scq = card->scq0;
1704 }
1705
1706 if (push_scqe(card, vc, scq, &scqe, skb, may_sleep) != 0) {
1707 atomic_inc(&vcc->stats->tx_err);
1708 dma_unmap_single(&card->pcidev->dev, NS_PRV_DMA(skb), skb->len,
1709 DMA_TO_DEVICE);
1710 dev_kfree_skb_any(skb);
1711 return -EIO;
1712 }
1713 atomic_inc(&vcc->stats->tx);
1714
1715 return 0;
1716}
1717
1718static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb)
1719{
1720 return _ns_send(vcc, skb, true);
1721}
1722
1723static int ns_send_bh(struct atm_vcc *vcc, struct sk_buff *skb)
1724{
1725 return _ns_send(vcc, skb, false);
1726}
1727
1728static int push_scqe(ns_dev * card, vc_map * vc, scq_info * scq, ns_scqe * tbd,
1729 struct sk_buff *skb, bool may_sleep)
1730{
1731 unsigned long flags;
1732 ns_scqe tsr;
1733 u32 scdi, scqi;
1734 int scq_is_vbr;
1735 u32 data;
1736 int index;
1737
1738 spin_lock_irqsave(&scq->lock, flags);
1739 while (scq->tail == scq->next) {
1740 if (!may_sleep) {
1741 spin_unlock_irqrestore(&scq->lock, flags);
1742 printk("nicstar%d: Error pushing TBD.\n", card->index);
1743 return 1;
1744 }
1745
1746 scq->full = 1;
1747 wait_event_interruptible_lock_irq_timeout(scq->scqfull_waitq,
1748 scq->tail != scq->next,
1749 scq->lock,
1750 SCQFULL_TIMEOUT);
1751
1752 if (scq->full) {
1753 spin_unlock_irqrestore(&scq->lock, flags);
1754 printk("nicstar%d: Timeout pushing TBD.\n",
1755 card->index);
1756 return 1;
1757 }
1758 }
1759 *scq->next = *tbd;
1760 index = (int)(scq->next - scq->base);
1761 scq->skb[index] = skb;
1762 XPRINTK("nicstar%d: sending skb at 0x%p (pos %d).\n",
1763 card->index, skb, index);
1764 XPRINTK("nicstar%d: TBD written:\n0x%x\n0x%x\n0x%x\n0x%x\n at 0x%p.\n",
1765 card->index, le32_to_cpu(tbd->word_1), le32_to_cpu(tbd->word_2),
1766 le32_to_cpu(tbd->word_3), le32_to_cpu(tbd->word_4),
1767 scq->next);
1768 if (scq->next == scq->last)
1769 scq->next = scq->base;
1770 else
1771 scq->next++;
1772
1773 vc->tbd_count++;
1774 if (scq->num_entries == VBR_SCQ_NUM_ENTRIES) {
1775 scq->tbd_count++;
1776 scq_is_vbr = 1;
1777 } else
1778 scq_is_vbr = 0;
1779
1780 if (vc->tbd_count >= MAX_TBD_PER_VC
1781 || scq->tbd_count >= MAX_TBD_PER_SCQ) {
1782 int has_run = 0;
1783
1784 while (scq->tail == scq->next) {
1785 if (!may_sleep) {
1786 data = scq_virt_to_bus(scq, scq->next);
1787 ns_write_sram(card, scq->scd, &data, 1);
1788 spin_unlock_irqrestore(&scq->lock, flags);
1789 printk("nicstar%d: Error pushing TSR.\n",
1790 card->index);
1791 return 0;
1792 }
1793
1794 scq->full = 1;
1795 if (has_run++)
1796 break;
1797 wait_event_interruptible_lock_irq_timeout(scq->scqfull_waitq,
1798 scq->tail != scq->next,
1799 scq->lock,
1800 SCQFULL_TIMEOUT);
1801 }
1802
1803 if (!scq->full) {
1804 tsr.word_1 = ns_tsr_mkword_1(NS_TSR_INTENABLE);
1805 if (scq_is_vbr)
1806 scdi = NS_TSR_SCDISVBR;
1807 else
1808 scdi = (vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE;
1809 scqi = scq->next - scq->base;
1810 tsr.word_2 = ns_tsr_mkword_2(scdi, scqi);
1811 tsr.word_3 = 0x00000000;
1812 tsr.word_4 = 0x00000000;
1813
1814 *scq->next = tsr;
1815 index = (int)scqi;
1816 scq->skb[index] = NULL;
1817 XPRINTK
1818 ("nicstar%d: TSR written:\n0x%x\n0x%x\n0x%x\n0x%x\n at 0x%p.\n",
1819 card->index, le32_to_cpu(tsr.word_1),
1820 le32_to_cpu(tsr.word_2), le32_to_cpu(tsr.word_3),
1821 le32_to_cpu(tsr.word_4), scq->next);
1822 if (scq->next == scq->last)
1823 scq->next = scq->base;
1824 else
1825 scq->next++;
1826 vc->tbd_count = 0;
1827 scq->tbd_count = 0;
1828 } else
1829 PRINTK("nicstar%d: Timeout pushing TSR.\n",
1830 card->index);
1831 }
1832 data = scq_virt_to_bus(scq, scq->next);
1833 ns_write_sram(card, scq->scd, &data, 1);
1834
1835 spin_unlock_irqrestore(&scq->lock, flags);
1836
1837 return 0;
1838}
1839
1840static void process_tsq(ns_dev * card)
1841{
1842 u32 scdi;
1843 scq_info *scq;
1844 ns_tsi *previous = NULL, *one_ahead, *two_ahead;
1845 int serviced_entries; /* flag indicating at least on entry was serviced */
1846
1847 serviced_entries = 0;
1848
1849 if (card->tsq.next == card->tsq.last)
1850 one_ahead = card->tsq.base;
1851 else
1852 one_ahead = card->tsq.next + 1;
1853
1854 if (one_ahead == card->tsq.last)
1855 two_ahead = card->tsq.base;
1856 else
1857 two_ahead = one_ahead + 1;
1858
1859 while (!ns_tsi_isempty(card->tsq.next) || !ns_tsi_isempty(one_ahead) ||
1860 !ns_tsi_isempty(two_ahead))
1861 /* At most two empty, as stated in the 77201 errata */
1862 {
1863 serviced_entries = 1;
1864
1865 /* Skip the one or two possible empty entries */
1866 while (ns_tsi_isempty(card->tsq.next)) {
1867 if (card->tsq.next == card->tsq.last)
1868 card->tsq.next = card->tsq.base;
1869 else
1870 card->tsq.next++;
1871 }
1872
1873 if (!ns_tsi_tmrof(card->tsq.next)) {
1874 scdi = ns_tsi_getscdindex(card->tsq.next);
1875 if (scdi == NS_TSI_SCDISVBR)
1876 scq = card->scq0;
1877 else {
1878 if (card->scd2vc[scdi] == NULL) {
1879 printk
1880 ("nicstar%d: could not find VC from SCD index.\n",
1881 card->index);
1882 ns_tsi_init(card->tsq.next);
1883 return;
1884 }
1885 scq = card->scd2vc[scdi]->scq;
1886 }
1887 drain_scq(card, scq, ns_tsi_getscqpos(card->tsq.next));
1888 scq->full = 0;
1889 wake_up_interruptible(&(scq->scqfull_waitq));
1890 }
1891
1892 ns_tsi_init(card->tsq.next);
1893 previous = card->tsq.next;
1894 if (card->tsq.next == card->tsq.last)
1895 card->tsq.next = card->tsq.base;
1896 else
1897 card->tsq.next++;
1898
1899 if (card->tsq.next == card->tsq.last)
1900 one_ahead = card->tsq.base;
1901 else
1902 one_ahead = card->tsq.next + 1;
1903
1904 if (one_ahead == card->tsq.last)
1905 two_ahead = card->tsq.base;
1906 else
1907 two_ahead = one_ahead + 1;
1908 }
1909
1910 if (serviced_entries)
1911 writel(PTR_DIFF(previous, card->tsq.base),
1912 card->membase + TSQH);
1913}
1914
1915static void drain_scq(ns_dev * card, scq_info * scq, int pos)
1916{
1917 struct atm_vcc *vcc;
1918 struct sk_buff *skb;
1919 int i;
1920 unsigned long flags;
1921
1922 XPRINTK("nicstar%d: drain_scq() called, scq at 0x%p, pos %d.\n",
1923 card->index, scq, pos);
1924 if (pos >= scq->num_entries) {
1925 printk("nicstar%d: Bad index on drain_scq().\n", card->index);
1926 return;
1927 }
1928
1929 spin_lock_irqsave(&scq->lock, flags);
1930 i = (int)(scq->tail - scq->base);
1931 if (++i == scq->num_entries)
1932 i = 0;
1933 while (i != pos) {
1934 skb = scq->skb[i];
1935 XPRINTK("nicstar%d: freeing skb at 0x%p (index %d).\n",
1936 card->index, skb, i);
1937 if (skb != NULL) {
1938 dma_unmap_single(&card->pcidev->dev,
1939 NS_PRV_DMA(skb),
1940 skb->len,
1941 DMA_TO_DEVICE);
1942 vcc = ATM_SKB(skb)->vcc;
1943 if (vcc && vcc->pop != NULL) {
1944 vcc->pop(vcc, skb);
1945 } else {
1946 dev_kfree_skb_irq(skb);
1947 }
1948 scq->skb[i] = NULL;
1949 }
1950 if (++i == scq->num_entries)
1951 i = 0;
1952 }
1953 scq->tail = scq->base + pos;
1954 spin_unlock_irqrestore(&scq->lock, flags);
1955}
1956
1957static void process_rsq(ns_dev * card)
1958{
1959 ns_rsqe *previous;
1960
1961 if (!ns_rsqe_valid(card->rsq.next))
1962 return;
1963 do {
1964 dequeue_rx(card, card->rsq.next);
1965 ns_rsqe_init(card->rsq.next);
1966 previous = card->rsq.next;
1967 if (card->rsq.next == card->rsq.last)
1968 card->rsq.next = card->rsq.base;
1969 else
1970 card->rsq.next++;
1971 } while (ns_rsqe_valid(card->rsq.next));
1972 writel(PTR_DIFF(previous, card->rsq.base), card->membase + RSQH);
1973}
1974
1975static void dequeue_rx(ns_dev * card, ns_rsqe * rsqe)
1976{
1977 u32 vpi, vci;
1978 vc_map *vc;
1979 struct sk_buff *iovb;
1980 struct iovec *iov;
1981 struct atm_vcc *vcc;
1982 struct sk_buff *skb;
1983 unsigned short aal5_len;
1984 int len;
1985 u32 stat;
1986 u32 id;
1987
1988 stat = readl(card->membase + STAT);
1989 card->sbfqc = ns_stat_sfbqc_get(stat);
1990 card->lbfqc = ns_stat_lfbqc_get(stat);
1991
1992 id = le32_to_cpu(rsqe->buffer_handle);
1993 skb = idr_remove(&card->idr, id);
1994 if (!skb) {
1995 RXPRINTK(KERN_ERR
1996 "nicstar%d: skb not found!\n", card->index);
1997 return;
1998 }
1999 dma_sync_single_for_cpu(&card->pcidev->dev,
2000 NS_PRV_DMA(skb),
2001 (NS_PRV_BUFTYPE(skb) == BUF_SM
2002 ? NS_SMSKBSIZE : NS_LGSKBSIZE),
2003 DMA_FROM_DEVICE);
2004 dma_unmap_single(&card->pcidev->dev,
2005 NS_PRV_DMA(skb),
2006 (NS_PRV_BUFTYPE(skb) == BUF_SM
2007 ? NS_SMSKBSIZE : NS_LGSKBSIZE),
2008 DMA_FROM_DEVICE);
2009 vpi = ns_rsqe_vpi(rsqe);
2010 vci = ns_rsqe_vci(rsqe);
2011 if (vpi >= 1UL << card->vpibits || vci >= 1UL << card->vcibits) {
2012 printk("nicstar%d: SDU received for out-of-range vc %d.%d.\n",
2013 card->index, vpi, vci);
2014 recycle_rx_buf(card, skb);
2015 return;
2016 }
2017
2018 vc = &(card->vcmap[vpi << card->vcibits | vci]);
2019 if (!vc->rx) {
2020 RXPRINTK("nicstar%d: SDU received on non-rx vc %d.%d.\n",
2021 card->index, vpi, vci);
2022 recycle_rx_buf(card, skb);
2023 return;
2024 }
2025
2026 vcc = vc->rx_vcc;
2027
2028 if (vcc->qos.aal == ATM_AAL0) {
2029 struct sk_buff *sb;
2030 unsigned char *cell;
2031 int i;
2032
2033 cell = skb->data;
2034 for (i = ns_rsqe_cellcount(rsqe); i; i--) {
2035 sb = dev_alloc_skb(NS_SMSKBSIZE);
2036 if (!sb) {
2037 printk
2038 ("nicstar%d: Can't allocate buffers for aal0.\n",
2039 card->index);
2040 atomic_add(i, &vcc->stats->rx_drop);
2041 break;
2042 }
2043 if (!atm_charge(vcc, sb->truesize)) {
2044 RXPRINTK
2045 ("nicstar%d: atm_charge() dropped aal0 packets.\n",
2046 card->index);
2047 atomic_add(i - 1, &vcc->stats->rx_drop); /* already increased by 1 */
2048 dev_kfree_skb_any(sb);
2049 break;
2050 }
2051 /* Rebuild the header */
2052 *((u32 *) sb->data) = le32_to_cpu(rsqe->word_1) << 4 |
2053 (ns_rsqe_clp(rsqe) ? 0x00000001 : 0x00000000);
2054 if (i == 1 && ns_rsqe_eopdu(rsqe))
2055 *((u32 *) sb->data) |= 0x00000002;
2056 skb_put(sb, NS_AAL0_HEADER);
2057 memcpy(skb_tail_pointer(sb), cell, ATM_CELL_PAYLOAD);
2058 skb_put(sb, ATM_CELL_PAYLOAD);
2059 ATM_SKB(sb)->vcc = vcc;
2060 __net_timestamp(sb);
2061 vcc->push(vcc, sb);
2062 atomic_inc(&vcc->stats->rx);
2063 cell += ATM_CELL_PAYLOAD;
2064 }
2065
2066 recycle_rx_buf(card, skb);
2067 return;
2068 }
2069
2070 /* To reach this point, the AAL layer can only be AAL5 */
2071
2072 if ((iovb = vc->rx_iov) == NULL) {
2073 iovb = skb_dequeue(&(card->iovpool.queue));
2074 if (iovb == NULL) { /* No buffers in the queue */
2075 iovb = alloc_skb(NS_IOVBUFSIZE, GFP_ATOMIC);
2076 if (iovb == NULL) {
2077 printk("nicstar%d: Out of iovec buffers.\n",
2078 card->index);
2079 atomic_inc(&vcc->stats->rx_drop);
2080 recycle_rx_buf(card, skb);
2081 return;
2082 }
2083 NS_PRV_BUFTYPE(iovb) = BUF_NONE;
2084 } else if (--card->iovpool.count < card->iovnr.min) {
2085 struct sk_buff *new_iovb;
2086 if ((new_iovb =
2087 alloc_skb(NS_IOVBUFSIZE, GFP_ATOMIC)) != NULL) {
2088 NS_PRV_BUFTYPE(iovb) = BUF_NONE;
2089 skb_queue_tail(&card->iovpool.queue, new_iovb);
2090 card->iovpool.count++;
2091 }
2092 }
2093 vc->rx_iov = iovb;
2094 NS_PRV_IOVCNT(iovb) = 0;
2095 iovb->len = 0;
2096 iovb->data = iovb->head;
2097 skb_reset_tail_pointer(iovb);
2098 /* IMPORTANT: a pointer to the sk_buff containing the small or large
2099 buffer is stored as iovec base, NOT a pointer to the
2100 small or large buffer itself. */
2101 } else if (NS_PRV_IOVCNT(iovb) >= NS_MAX_IOVECS) {
2102 printk("nicstar%d: received too big AAL5 SDU.\n", card->index);
2103 atomic_inc(&vcc->stats->rx_err);
2104 recycle_iovec_rx_bufs(card, (struct iovec *)iovb->data,
2105 NS_MAX_IOVECS);
2106 NS_PRV_IOVCNT(iovb) = 0;
2107 iovb->len = 0;
2108 iovb->data = iovb->head;
2109 skb_reset_tail_pointer(iovb);
2110 }
2111 iov = &((struct iovec *)iovb->data)[NS_PRV_IOVCNT(iovb)++];
2112 iov->iov_base = (void *)skb;
2113 iov->iov_len = ns_rsqe_cellcount(rsqe) * 48;
2114 iovb->len += iov->iov_len;
2115
2116#ifdef EXTRA_DEBUG
2117 if (NS_PRV_IOVCNT(iovb) == 1) {
2118 if (NS_PRV_BUFTYPE(skb) != BUF_SM) {
2119 printk
2120 ("nicstar%d: Expected a small buffer, and this is not one.\n",
2121 card->index);
2122 which_list(card, skb);
2123 atomic_inc(&vcc->stats->rx_err);
2124 recycle_rx_buf(card, skb);
2125 vc->rx_iov = NULL;
2126 recycle_iov_buf(card, iovb);
2127 return;
2128 }
2129 } else { /* NS_PRV_IOVCNT(iovb) >= 2 */
2130
2131 if (NS_PRV_BUFTYPE(skb) != BUF_LG) {
2132 printk
2133 ("nicstar%d: Expected a large buffer, and this is not one.\n",
2134 card->index);
2135 which_list(card, skb);
2136 atomic_inc(&vcc->stats->rx_err);
2137 recycle_iovec_rx_bufs(card, (struct iovec *)iovb->data,
2138 NS_PRV_IOVCNT(iovb));
2139 vc->rx_iov = NULL;
2140 recycle_iov_buf(card, iovb);
2141 return;
2142 }
2143 }
2144#endif /* EXTRA_DEBUG */
2145
2146 if (ns_rsqe_eopdu(rsqe)) {
2147 /* This works correctly regardless of the endianness of the host */
2148 unsigned char *L1L2 = (unsigned char *)
2149 (skb->data + iov->iov_len - 6);
2150 aal5_len = L1L2[0] << 8 | L1L2[1];
2151 len = (aal5_len == 0x0000) ? 0x10000 : aal5_len;
2152 if (ns_rsqe_crcerr(rsqe) ||
2153 len + 8 > iovb->len || len + (47 + 8) < iovb->len) {
2154 printk("nicstar%d: AAL5 CRC error", card->index);
2155 if (len + 8 > iovb->len || len + (47 + 8) < iovb->len)
2156 printk(" - PDU size mismatch.\n");
2157 else
2158 printk(".\n");
2159 atomic_inc(&vcc->stats->rx_err);
2160 recycle_iovec_rx_bufs(card, (struct iovec *)iovb->data,
2161 NS_PRV_IOVCNT(iovb));
2162 vc->rx_iov = NULL;
2163 recycle_iov_buf(card, iovb);
2164 return;
2165 }
2166
2167 /* By this point we (hopefully) have a complete SDU without errors. */
2168
2169 if (NS_PRV_IOVCNT(iovb) == 1) { /* Just a small buffer */
2170 /* skb points to a small buffer */
2171 if (!atm_charge(vcc, skb->truesize)) {
2172 push_rxbufs(card, skb);
2173 atomic_inc(&vcc->stats->rx_drop);
2174 } else {
2175 skb_put(skb, len);
2176 dequeue_sm_buf(card, skb);
2177 ATM_SKB(skb)->vcc = vcc;
2178 __net_timestamp(skb);
2179 vcc->push(vcc, skb);
2180 atomic_inc(&vcc->stats->rx);
2181 }
2182 } else if (NS_PRV_IOVCNT(iovb) == 2) { /* One small plus one large buffer */
2183 struct sk_buff *sb;
2184
2185 sb = (struct sk_buff *)(iov - 1)->iov_base;
2186 /* skb points to a large buffer */
2187
2188 if (len <= NS_SMBUFSIZE) {
2189 if (!atm_charge(vcc, sb->truesize)) {
2190 push_rxbufs(card, sb);
2191 atomic_inc(&vcc->stats->rx_drop);
2192 } else {
2193 skb_put(sb, len);
2194 dequeue_sm_buf(card, sb);
2195 ATM_SKB(sb)->vcc = vcc;
2196 __net_timestamp(sb);
2197 vcc->push(vcc, sb);
2198 atomic_inc(&vcc->stats->rx);
2199 }
2200
2201 push_rxbufs(card, skb);
2202
2203 } else { /* len > NS_SMBUFSIZE, the usual case */
2204
2205 if (!atm_charge(vcc, skb->truesize)) {
2206 push_rxbufs(card, skb);
2207 atomic_inc(&vcc->stats->rx_drop);
2208 } else {
2209 dequeue_lg_buf(card, skb);
2210 skb_push(skb, NS_SMBUFSIZE);
2211 skb_copy_from_linear_data(sb, skb->data,
2212 NS_SMBUFSIZE);
2213 skb_put(skb, len - NS_SMBUFSIZE);
2214 ATM_SKB(skb)->vcc = vcc;
2215 __net_timestamp(skb);
2216 vcc->push(vcc, skb);
2217 atomic_inc(&vcc->stats->rx);
2218 }
2219
2220 push_rxbufs(card, sb);
2221
2222 }
2223
2224 } else { /* Must push a huge buffer */
2225
2226 struct sk_buff *hb, *sb, *lb;
2227 int remaining, tocopy;
2228 int j;
2229
2230 hb = skb_dequeue(&(card->hbpool.queue));
2231 if (hb == NULL) { /* No buffers in the queue */
2232
2233 hb = dev_alloc_skb(NS_HBUFSIZE);
2234 if (hb == NULL) {
2235 printk
2236 ("nicstar%d: Out of huge buffers.\n",
2237 card->index);
2238 atomic_inc(&vcc->stats->rx_drop);
2239 recycle_iovec_rx_bufs(card,
2240 (struct iovec *)
2241 iovb->data,
2242 NS_PRV_IOVCNT(iovb));
2243 vc->rx_iov = NULL;
2244 recycle_iov_buf(card, iovb);
2245 return;
2246 } else if (card->hbpool.count < card->hbnr.min) {
2247 struct sk_buff *new_hb;
2248 if ((new_hb =
2249 dev_alloc_skb(NS_HBUFSIZE)) !=
2250 NULL) {
2251 skb_queue_tail(&card->hbpool.
2252 queue, new_hb);
2253 card->hbpool.count++;
2254 }
2255 }
2256 NS_PRV_BUFTYPE(hb) = BUF_NONE;
2257 } else if (--card->hbpool.count < card->hbnr.min) {
2258 struct sk_buff *new_hb;
2259 if ((new_hb =
2260 dev_alloc_skb(NS_HBUFSIZE)) != NULL) {
2261 NS_PRV_BUFTYPE(new_hb) = BUF_NONE;
2262 skb_queue_tail(&card->hbpool.queue,
2263 new_hb);
2264 card->hbpool.count++;
2265 }
2266 if (card->hbpool.count < card->hbnr.min) {
2267 if ((new_hb =
2268 dev_alloc_skb(NS_HBUFSIZE)) !=
2269 NULL) {
2270 NS_PRV_BUFTYPE(new_hb) =
2271 BUF_NONE;
2272 skb_queue_tail(&card->hbpool.
2273 queue, new_hb);
2274 card->hbpool.count++;
2275 }
2276 }
2277 }
2278
2279 iov = (struct iovec *)iovb->data;
2280
2281 if (!atm_charge(vcc, hb->truesize)) {
2282 recycle_iovec_rx_bufs(card, iov,
2283 NS_PRV_IOVCNT(iovb));
2284 if (card->hbpool.count < card->hbnr.max) {
2285 skb_queue_tail(&card->hbpool.queue, hb);
2286 card->hbpool.count++;
2287 } else
2288 dev_kfree_skb_any(hb);
2289 atomic_inc(&vcc->stats->rx_drop);
2290 } else {
2291 /* Copy the small buffer to the huge buffer */
2292 sb = (struct sk_buff *)iov->iov_base;
2293 skb_copy_from_linear_data(sb, hb->data,
2294 iov->iov_len);
2295 skb_put(hb, iov->iov_len);
2296 remaining = len - iov->iov_len;
2297 iov++;
2298 /* Free the small buffer */
2299 push_rxbufs(card, sb);
2300
2301 /* Copy all large buffers to the huge buffer and free them */
2302 for (j = 1; j < NS_PRV_IOVCNT(iovb); j++) {
2303 lb = (struct sk_buff *)iov->iov_base;
2304 tocopy =
2305 min_t(int, remaining, iov->iov_len);
2306 skb_copy_from_linear_data(lb,
2307 skb_tail_pointer
2308 (hb), tocopy);
2309 skb_put(hb, tocopy);
2310 iov++;
2311 remaining -= tocopy;
2312 push_rxbufs(card, lb);
2313 }
2314#ifdef EXTRA_DEBUG
2315 if (remaining != 0 || hb->len != len)
2316 printk
2317 ("nicstar%d: Huge buffer len mismatch.\n",
2318 card->index);
2319#endif /* EXTRA_DEBUG */
2320 ATM_SKB(hb)->vcc = vcc;
2321 __net_timestamp(hb);
2322 vcc->push(vcc, hb);
2323 atomic_inc(&vcc->stats->rx);
2324 }
2325 }
2326
2327 vc->rx_iov = NULL;
2328 recycle_iov_buf(card, iovb);
2329 }
2330
2331}
2332
2333static void recycle_rx_buf(ns_dev * card, struct sk_buff *skb)
2334{
2335 if (unlikely(NS_PRV_BUFTYPE(skb) == BUF_NONE)) {
2336 printk("nicstar%d: What kind of rx buffer is this?\n",
2337 card->index);
2338 dev_kfree_skb_any(skb);
2339 } else
2340 push_rxbufs(card, skb);
2341}
2342
2343static void recycle_iovec_rx_bufs(ns_dev * card, struct iovec *iov, int count)
2344{
2345 while (count-- > 0)
2346 recycle_rx_buf(card, (struct sk_buff *)(iov++)->iov_base);
2347}
2348
2349static void recycle_iov_buf(ns_dev * card, struct sk_buff *iovb)
2350{
2351 if (card->iovpool.count < card->iovnr.max) {
2352 skb_queue_tail(&card->iovpool.queue, iovb);
2353 card->iovpool.count++;
2354 } else
2355 dev_kfree_skb_any(iovb);
2356}
2357
2358static void dequeue_sm_buf(ns_dev * card, struct sk_buff *sb)
2359{
2360 skb_unlink(sb, &card->sbpool.queue);
2361 if (card->sbfqc < card->sbnr.init) {
2362 struct sk_buff *new_sb;
2363 if ((new_sb = dev_alloc_skb(NS_SMSKBSIZE)) != NULL) {
2364 NS_PRV_BUFTYPE(new_sb) = BUF_SM;
2365 skb_queue_tail(&card->sbpool.queue, new_sb);
2366 skb_reserve(new_sb, NS_AAL0_HEADER);
2367 push_rxbufs(card, new_sb);
2368 }
2369 }
2370 if (card->sbfqc < card->sbnr.init)
2371 {
2372 struct sk_buff *new_sb;
2373 if ((new_sb = dev_alloc_skb(NS_SMSKBSIZE)) != NULL) {
2374 NS_PRV_BUFTYPE(new_sb) = BUF_SM;
2375 skb_queue_tail(&card->sbpool.queue, new_sb);
2376 skb_reserve(new_sb, NS_AAL0_HEADER);
2377 push_rxbufs(card, new_sb);
2378 }
2379 }
2380}
2381
2382static void dequeue_lg_buf(ns_dev * card, struct sk_buff *lb)
2383{
2384 skb_unlink(lb, &card->lbpool.queue);
2385 if (card->lbfqc < card->lbnr.init) {
2386 struct sk_buff *new_lb;
2387 if ((new_lb = dev_alloc_skb(NS_LGSKBSIZE)) != NULL) {
2388 NS_PRV_BUFTYPE(new_lb) = BUF_LG;
2389 skb_queue_tail(&card->lbpool.queue, new_lb);
2390 skb_reserve(new_lb, NS_SMBUFSIZE);
2391 push_rxbufs(card, new_lb);
2392 }
2393 }
2394 if (card->lbfqc < card->lbnr.init)
2395 {
2396 struct sk_buff *new_lb;
2397 if ((new_lb = dev_alloc_skb(NS_LGSKBSIZE)) != NULL) {
2398 NS_PRV_BUFTYPE(new_lb) = BUF_LG;
2399 skb_queue_tail(&card->lbpool.queue, new_lb);
2400 skb_reserve(new_lb, NS_SMBUFSIZE);
2401 push_rxbufs(card, new_lb);
2402 }
2403 }
2404}
2405
2406static int ns_proc_read(struct atm_dev *dev, loff_t * pos, char *page)
2407{
2408 u32 stat;
2409 ns_dev *card;
2410 int left;
2411
2412 left = (int)*pos;
2413 card = (ns_dev *) dev->dev_data;
2414 stat = readl(card->membase + STAT);
2415 if (!left--)
2416 return sprintf(page, "Pool count min init max \n");
2417 if (!left--)
2418 return sprintf(page, "Small %5d %5d %5d %5d \n",
2419 ns_stat_sfbqc_get(stat), card->sbnr.min,
2420 card->sbnr.init, card->sbnr.max);
2421 if (!left--)
2422 return sprintf(page, "Large %5d %5d %5d %5d \n",
2423 ns_stat_lfbqc_get(stat), card->lbnr.min,
2424 card->lbnr.init, card->lbnr.max);
2425 if (!left--)
2426 return sprintf(page, "Huge %5d %5d %5d %5d \n",
2427 card->hbpool.count, card->hbnr.min,
2428 card->hbnr.init, card->hbnr.max);
2429 if (!left--)
2430 return sprintf(page, "Iovec %5d %5d %5d %5d \n",
2431 card->iovpool.count, card->iovnr.min,
2432 card->iovnr.init, card->iovnr.max);
2433 if (!left--) {
2434 int retval;
2435 retval =
2436 sprintf(page, "Interrupt counter: %u \n", card->intcnt);
2437 card->intcnt = 0;
2438 return retval;
2439 }
2440#if 0
2441 /* Dump 25.6 Mbps PHY registers */
2442 /* Now there's a 25.6 Mbps PHY driver this code isn't needed. I left it
2443 here just in case it's needed for debugging. */
2444 if (card->max_pcr == ATM_25_PCR && !left--) {
2445 u32 phy_regs[4];
2446 u32 i;
2447
2448 for (i = 0; i < 4; i++) {
2449 while (CMD_BUSY(card)) ;
2450 writel(NS_CMD_READ_UTILITY | 0x00000200 | i,
2451 card->membase + CMD);
2452 while (CMD_BUSY(card)) ;
2453 phy_regs[i] = readl(card->membase + DR0) & 0x000000FF;
2454 }
2455
2456 return sprintf(page, "PHY regs: 0x%02X 0x%02X 0x%02X 0x%02X \n",
2457 phy_regs[0], phy_regs[1], phy_regs[2],
2458 phy_regs[3]);
2459 }
2460#endif /* 0 - Dump 25.6 Mbps PHY registers */
2461#if 0
2462 /* Dump TST */
2463 if (left-- < NS_TST_NUM_ENTRIES) {
2464 if (card->tste2vc[left + 1] == NULL)
2465 return sprintf(page, "%5d - VBR/UBR \n", left + 1);
2466 else
2467 return sprintf(page, "%5d - %d %d \n", left + 1,
2468 card->tste2vc[left + 1]->tx_vcc->vpi,
2469 card->tste2vc[left + 1]->tx_vcc->vci);
2470 }
2471#endif /* 0 */
2472 return 0;
2473}
2474
2475static int ns_ioctl(struct atm_dev *dev, unsigned int cmd, void __user * arg)
2476{
2477 ns_dev *card;
2478 pool_levels pl;
2479 long btype;
2480 unsigned long flags;
2481
2482 card = dev->dev_data;
2483 switch (cmd) {
2484 case NS_GETPSTAT:
2485 if (get_user
2486 (pl.buftype, &((pool_levels __user *) arg)->buftype))
2487 return -EFAULT;
2488 switch (pl.buftype) {
2489 case NS_BUFTYPE_SMALL:
2490 pl.count =
2491 ns_stat_sfbqc_get(readl(card->membase + STAT));
2492 pl.level.min = card->sbnr.min;
2493 pl.level.init = card->sbnr.init;
2494 pl.level.max = card->sbnr.max;
2495 break;
2496
2497 case NS_BUFTYPE_LARGE:
2498 pl.count =
2499 ns_stat_lfbqc_get(readl(card->membase + STAT));
2500 pl.level.min = card->lbnr.min;
2501 pl.level.init = card->lbnr.init;
2502 pl.level.max = card->lbnr.max;
2503 break;
2504
2505 case NS_BUFTYPE_HUGE:
2506 pl.count = card->hbpool.count;
2507 pl.level.min = card->hbnr.min;
2508 pl.level.init = card->hbnr.init;
2509 pl.level.max = card->hbnr.max;
2510 break;
2511
2512 case NS_BUFTYPE_IOVEC:
2513 pl.count = card->iovpool.count;
2514 pl.level.min = card->iovnr.min;
2515 pl.level.init = card->iovnr.init;
2516 pl.level.max = card->iovnr.max;
2517 break;
2518
2519 default:
2520 return -ENOIOCTLCMD;
2521
2522 }
2523 if (!copy_to_user((pool_levels __user *) arg, &pl, sizeof(pl)))
2524 return (sizeof(pl));
2525 else
2526 return -EFAULT;
2527
2528 case NS_SETBUFLEV:
2529 if (!capable(CAP_NET_ADMIN))
2530 return -EPERM;
2531 if (copy_from_user(&pl, (pool_levels __user *) arg, sizeof(pl)))
2532 return -EFAULT;
2533 if (pl.level.min >= pl.level.init
2534 || pl.level.init >= pl.level.max)
2535 return -EINVAL;
2536 if (pl.level.min == 0)
2537 return -EINVAL;
2538 switch (pl.buftype) {
2539 case NS_BUFTYPE_SMALL:
2540 if (pl.level.max > TOP_SB)
2541 return -EINVAL;
2542 card->sbnr.min = pl.level.min;
2543 card->sbnr.init = pl.level.init;
2544 card->sbnr.max = pl.level.max;
2545 break;
2546
2547 case NS_BUFTYPE_LARGE:
2548 if (pl.level.max > TOP_LB)
2549 return -EINVAL;
2550 card->lbnr.min = pl.level.min;
2551 card->lbnr.init = pl.level.init;
2552 card->lbnr.max = pl.level.max;
2553 break;
2554
2555 case NS_BUFTYPE_HUGE:
2556 if (pl.level.max > TOP_HB)
2557 return -EINVAL;
2558 card->hbnr.min = pl.level.min;
2559 card->hbnr.init = pl.level.init;
2560 card->hbnr.max = pl.level.max;
2561 break;
2562
2563 case NS_BUFTYPE_IOVEC:
2564 if (pl.level.max > TOP_IOVB)
2565 return -EINVAL;
2566 card->iovnr.min = pl.level.min;
2567 card->iovnr.init = pl.level.init;
2568 card->iovnr.max = pl.level.max;
2569 break;
2570
2571 default:
2572 return -EINVAL;
2573
2574 }
2575 return 0;
2576
2577 case NS_ADJBUFLEV:
2578 if (!capable(CAP_NET_ADMIN))
2579 return -EPERM;
2580 btype = (long)arg; /* a long is the same size as a pointer or bigger */
2581 switch (btype) {
2582 case NS_BUFTYPE_SMALL:
2583 while (card->sbfqc < card->sbnr.init) {
2584 struct sk_buff *sb;
2585
2586 sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
2587 if (sb == NULL)
2588 return -ENOMEM;
2589 NS_PRV_BUFTYPE(sb) = BUF_SM;
2590 skb_queue_tail(&card->sbpool.queue, sb);
2591 skb_reserve(sb, NS_AAL0_HEADER);
2592 push_rxbufs(card, sb);
2593 }
2594 break;
2595
2596 case NS_BUFTYPE_LARGE:
2597 while (card->lbfqc < card->lbnr.init) {
2598 struct sk_buff *lb;
2599
2600 lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
2601 if (lb == NULL)
2602 return -ENOMEM;
2603 NS_PRV_BUFTYPE(lb) = BUF_LG;
2604 skb_queue_tail(&card->lbpool.queue, lb);
2605 skb_reserve(lb, NS_SMBUFSIZE);
2606 push_rxbufs(card, lb);
2607 }
2608 break;
2609
2610 case NS_BUFTYPE_HUGE:
2611 while (card->hbpool.count > card->hbnr.init) {
2612 struct sk_buff *hb;
2613
2614 spin_lock_irqsave(&card->int_lock, flags);
2615 hb = skb_dequeue(&card->hbpool.queue);
2616 card->hbpool.count--;
2617 spin_unlock_irqrestore(&card->int_lock, flags);
2618 if (hb == NULL)
2619 printk
2620 ("nicstar%d: huge buffer count inconsistent.\n",
2621 card->index);
2622 else
2623 dev_kfree_skb_any(hb);
2624
2625 }
2626 while (card->hbpool.count < card->hbnr.init) {
2627 struct sk_buff *hb;
2628
2629 hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
2630 if (hb == NULL)
2631 return -ENOMEM;
2632 NS_PRV_BUFTYPE(hb) = BUF_NONE;
2633 spin_lock_irqsave(&card->int_lock, flags);
2634 skb_queue_tail(&card->hbpool.queue, hb);
2635 card->hbpool.count++;
2636 spin_unlock_irqrestore(&card->int_lock, flags);
2637 }
2638 break;
2639
2640 case NS_BUFTYPE_IOVEC:
2641 while (card->iovpool.count > card->iovnr.init) {
2642 struct sk_buff *iovb;
2643
2644 spin_lock_irqsave(&card->int_lock, flags);
2645 iovb = skb_dequeue(&card->iovpool.queue);
2646 card->iovpool.count--;
2647 spin_unlock_irqrestore(&card->int_lock, flags);
2648 if (iovb == NULL)
2649 printk
2650 ("nicstar%d: iovec buffer count inconsistent.\n",
2651 card->index);
2652 else
2653 dev_kfree_skb_any(iovb);
2654
2655 }
2656 while (card->iovpool.count < card->iovnr.init) {
2657 struct sk_buff *iovb;
2658
2659 iovb = alloc_skb(NS_IOVBUFSIZE, GFP_KERNEL);
2660 if (iovb == NULL)
2661 return -ENOMEM;
2662 NS_PRV_BUFTYPE(iovb) = BUF_NONE;
2663 spin_lock_irqsave(&card->int_lock, flags);
2664 skb_queue_tail(&card->iovpool.queue, iovb);
2665 card->iovpool.count++;
2666 spin_unlock_irqrestore(&card->int_lock, flags);
2667 }
2668 break;
2669
2670 default:
2671 return -EINVAL;
2672
2673 }
2674 return 0;
2675
2676 default:
2677 if (dev->phy && dev->phy->ioctl) {
2678 return dev->phy->ioctl(dev, cmd, arg);
2679 } else {
2680 printk("nicstar%d: %s == NULL \n", card->index,
2681 dev->phy ? "dev->phy->ioctl" : "dev->phy");
2682 return -ENOIOCTLCMD;
2683 }
2684 }
2685}
2686
2687#ifdef EXTRA_DEBUG
2688static void which_list(ns_dev * card, struct sk_buff *skb)
2689{
2690 printk("skb buf_type: 0x%08x\n", NS_PRV_BUFTYPE(skb));
2691}
2692#endif /* EXTRA_DEBUG */
2693
2694static void ns_poll(struct timer_list *unused)
2695{
2696 int i;
2697 ns_dev *card;
2698 unsigned long flags;
2699 u32 stat_r, stat_w;
2700
2701 PRINTK("nicstar: Entering ns_poll().\n");
2702 for (i = 0; i < num_cards; i++) {
2703 card = cards[i];
2704 if (!spin_trylock_irqsave(&card->int_lock, flags)) {
2705 /* Probably it isn't worth spinning */
2706 continue;
2707 }
2708
2709 stat_w = 0;
2710 stat_r = readl(card->membase + STAT);
2711 if (stat_r & NS_STAT_TSIF)
2712 stat_w |= NS_STAT_TSIF;
2713 if (stat_r & NS_STAT_EOPDU)
2714 stat_w |= NS_STAT_EOPDU;
2715
2716 process_tsq(card);
2717 process_rsq(card);
2718
2719 writel(stat_w, card->membase + STAT);
2720 spin_unlock_irqrestore(&card->int_lock, flags);
2721 }
2722 mod_timer(&ns_timer, jiffies + NS_POLL_PERIOD);
2723 PRINTK("nicstar: Leaving ns_poll().\n");
2724}
2725
2726static void ns_phy_put(struct atm_dev *dev, unsigned char value,
2727 unsigned long addr)
2728{
2729 ns_dev *card;
2730 unsigned long flags;
2731
2732 card = dev->dev_data;
2733 spin_lock_irqsave(&card->res_lock, flags);
2734 while (CMD_BUSY(card)) ;
2735 writel((u32) value, card->membase + DR0);
2736 writel(NS_CMD_WRITE_UTILITY | 0x00000200 | (addr & 0x000000FF),
2737 card->membase + CMD);
2738 spin_unlock_irqrestore(&card->res_lock, flags);
2739}
2740
2741static unsigned char ns_phy_get(struct atm_dev *dev, unsigned long addr)
2742{
2743 ns_dev *card;
2744 unsigned long flags;
2745 u32 data;
2746
2747 card = dev->dev_data;
2748 spin_lock_irqsave(&card->res_lock, flags);
2749 while (CMD_BUSY(card)) ;
2750 writel(NS_CMD_READ_UTILITY | 0x00000200 | (addr & 0x000000FF),
2751 card->membase + CMD);
2752 while (CMD_BUSY(card)) ;
2753 data = readl(card->membase + DR0) & 0x000000FF;
2754 spin_unlock_irqrestore(&card->res_lock, flags);
2755 return (unsigned char)data;
2756}
2757
2758module_init(nicstar_init);
2759module_exit(nicstar_cleanup);
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 <linux/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
119static u32 ns_read_sram(ns_dev * card, u32 sram_address);
120static void ns_write_sram(ns_dev * card, u32 sram_address, u32 * value,
121 int count);
122static int ns_init_card(int i, struct pci_dev *pcidev);
123static void ns_init_card_error(ns_dev * card, int error);
124static scq_info *get_scq(ns_dev *card, int size, u32 scd);
125static void free_scq(ns_dev *card, scq_info * scq, struct atm_vcc *vcc);
126static void push_rxbufs(ns_dev *, struct sk_buff *);
127static irqreturn_t ns_irq_handler(int irq, void *dev_id);
128static int ns_open(struct atm_vcc *vcc);
129static void ns_close(struct atm_vcc *vcc);
130static void fill_tst(ns_dev * card, int n, vc_map * vc);
131static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb);
132static int push_scqe(ns_dev * card, vc_map * vc, scq_info * scq, ns_scqe * tbd,
133 struct sk_buff *skb);
134static void process_tsq(ns_dev * card);
135static void drain_scq(ns_dev * card, scq_info * scq, int pos);
136static void process_rsq(ns_dev * card);
137static void dequeue_rx(ns_dev * card, ns_rsqe * rsqe);
138static void recycle_rx_buf(ns_dev * card, struct sk_buff *skb);
139static void recycle_iovec_rx_bufs(ns_dev * card, struct iovec *iov, int count);
140static void recycle_iov_buf(ns_dev * card, struct sk_buff *iovb);
141static void dequeue_sm_buf(ns_dev * card, struct sk_buff *sb);
142static void dequeue_lg_buf(ns_dev * card, struct sk_buff *lb);
143static int ns_proc_read(struct atm_dev *dev, loff_t * pos, char *page);
144static int ns_ioctl(struct atm_dev *dev, unsigned int cmd, void __user * arg);
145#ifdef EXTRA_DEBUG
146static void which_list(ns_dev * card, struct sk_buff *skb);
147#endif
148static void ns_poll(unsigned long arg);
149static void ns_phy_put(struct atm_dev *dev, unsigned char value,
150 unsigned long addr);
151static unsigned char ns_phy_get(struct atm_dev *dev, unsigned long addr);
152
153/* Global variables */
154
155static struct ns_dev *cards[NS_MAX_CARDS];
156static unsigned num_cards;
157static 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
168static struct timer_list ns_timer;
169static char *mac[NS_MAX_CARDS];
170module_param_array(mac, charp, NULL, 0);
171MODULE_LICENSE("GPL");
172
173/* Functions */
174
175static 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;
191err_out:
192 return -ENODEV;
193}
194
195static 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
256static struct pci_device_id nicstar_pci_tbl[] = {
257 { PCI_VDEVICE(IDT, PCI_DEVICE_ID_IDT_IDT77201), 0 },
258 {0,} /* terminate list */
259};
260
261MODULE_DEVICE_TABLE(pci, nicstar_pci_tbl);
262
263static 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
270static 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
297static 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
308static 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
324static 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
345static 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 card = kmalloc(sizeof(*card), GFP_KERNEL);
374 if (!card) {
375 printk
376 ("nicstar%d: can't allocate memory for device structure.\n",
377 i);
378 error = 2;
379 ns_init_card_error(card, error);
380 return error;
381 }
382 cards[i] = card;
383 spin_lock_init(&card->int_lock);
384 spin_lock_init(&card->res_lock);
385
386 pci_set_drvdata(pcidev, card);
387
388 card->index = i;
389 card->atmdev = NULL;
390 card->pcidev = pcidev;
391 membase = pci_resource_start(pcidev, 1);
392 card->membase = ioremap(membase, NS_IOREMAP_SIZE);
393 if (!card->membase) {
394 printk("nicstar%d: can't ioremap() membase.\n", i);
395 error = 3;
396 ns_init_card_error(card, error);
397 return error;
398 }
399 PRINTK("nicstar%d: membase at 0x%p.\n", i, card->membase);
400
401 pci_set_master(pcidev);
402
403 if (pci_read_config_byte(pcidev, PCI_LATENCY_TIMER, &pci_latency) != 0) {
404 printk("nicstar%d: can't read PCI latency timer.\n", i);
405 error = 6;
406 ns_init_card_error(card, error);
407 return error;
408 }
409#ifdef NS_PCI_LATENCY
410 if (pci_latency < NS_PCI_LATENCY) {
411 PRINTK("nicstar%d: setting PCI latency timer to %d.\n", i,
412 NS_PCI_LATENCY);
413 for (j = 1; j < 4; j++) {
414 if (pci_write_config_byte
415 (pcidev, PCI_LATENCY_TIMER, NS_PCI_LATENCY) != 0)
416 break;
417 }
418 if (j == 4) {
419 printk
420 ("nicstar%d: can't set PCI latency timer to %d.\n",
421 i, NS_PCI_LATENCY);
422 error = 7;
423 ns_init_card_error(card, error);
424 return error;
425 }
426 }
427#endif /* NS_PCI_LATENCY */
428
429 /* Clear timer overflow */
430 data = readl(card->membase + STAT);
431 if (data & NS_STAT_TMROF)
432 writel(NS_STAT_TMROF, card->membase + STAT);
433
434 /* Software reset */
435 writel(NS_CFG_SWRST, card->membase + CFG);
436 NS_DELAY;
437 writel(0x00000000, card->membase + CFG);
438
439 /* PHY reset */
440 writel(0x00000008, card->membase + GP);
441 NS_DELAY;
442 writel(0x00000001, card->membase + GP);
443 NS_DELAY;
444 while (CMD_BUSY(card)) ;
445 writel(NS_CMD_WRITE_UTILITY | 0x00000100, card->membase + CMD); /* Sync UTOPIA with SAR clock */
446 NS_DELAY;
447
448 /* Detect PHY type */
449 while (CMD_BUSY(card)) ;
450 writel(NS_CMD_READ_UTILITY | 0x00000200, card->membase + CMD);
451 while (CMD_BUSY(card)) ;
452 data = readl(card->membase + DR0);
453 switch (data) {
454 case 0x00000009:
455 printk("nicstar%d: PHY seems to be 25 Mbps.\n", i);
456 card->max_pcr = ATM_25_PCR;
457 while (CMD_BUSY(card)) ;
458 writel(0x00000008, card->membase + DR0);
459 writel(NS_CMD_WRITE_UTILITY | 0x00000200, card->membase + CMD);
460 /* Clear an eventual pending interrupt */
461 writel(NS_STAT_SFBQF, card->membase + STAT);
462#ifdef PHY_LOOPBACK
463 while (CMD_BUSY(card)) ;
464 writel(0x00000022, card->membase + DR0);
465 writel(NS_CMD_WRITE_UTILITY | 0x00000202, card->membase + CMD);
466#endif /* PHY_LOOPBACK */
467 break;
468 case 0x00000030:
469 case 0x00000031:
470 printk("nicstar%d: PHY seems to be 155 Mbps.\n", i);
471 card->max_pcr = ATM_OC3_PCR;
472#ifdef PHY_LOOPBACK
473 while (CMD_BUSY(card)) ;
474 writel(0x00000002, card->membase + DR0);
475 writel(NS_CMD_WRITE_UTILITY | 0x00000205, card->membase + CMD);
476#endif /* PHY_LOOPBACK */
477 break;
478 default:
479 printk("nicstar%d: unknown PHY type (0x%08X).\n", i, data);
480 error = 8;
481 ns_init_card_error(card, error);
482 return error;
483 }
484 writel(0x00000000, card->membase + GP);
485
486 /* Determine SRAM size */
487 data = 0x76543210;
488 ns_write_sram(card, 0x1C003, &data, 1);
489 data = 0x89ABCDEF;
490 ns_write_sram(card, 0x14003, &data, 1);
491 if (ns_read_sram(card, 0x14003) == 0x89ABCDEF &&
492 ns_read_sram(card, 0x1C003) == 0x76543210)
493 card->sram_size = 128;
494 else
495 card->sram_size = 32;
496 PRINTK("nicstar%d: %dK x 32bit SRAM size.\n", i, card->sram_size);
497
498 card->rct_size = NS_MAX_RCTSIZE;
499
500#if (NS_MAX_RCTSIZE == 4096)
501 if (card->sram_size == 128)
502 printk
503 ("nicstar%d: limiting maximum VCI. See NS_MAX_RCTSIZE in nicstar.h\n",
504 i);
505#elif (NS_MAX_RCTSIZE == 16384)
506 if (card->sram_size == 32) {
507 printk
508 ("nicstar%d: wasting memory. See NS_MAX_RCTSIZE in nicstar.h\n",
509 i);
510 card->rct_size = 4096;
511 }
512#else
513#error NS_MAX_RCTSIZE must be either 4096 or 16384 in nicstar.c
514#endif
515
516 card->vpibits = NS_VPIBITS;
517 if (card->rct_size == 4096)
518 card->vcibits = 12 - NS_VPIBITS;
519 else /* card->rct_size == 16384 */
520 card->vcibits = 14 - NS_VPIBITS;
521
522 /* Initialize the nicstar eeprom/eprom stuff, for the MAC addr */
523 if (mac[i] == NULL)
524 nicstar_init_eprom(card->membase);
525
526 /* Set the VPI/VCI MSb mask to zero so we can receive OAM cells */
527 writel(0x00000000, card->membase + VPM);
528
529 /* Initialize TSQ */
530 card->tsq.org = dma_alloc_coherent(&card->pcidev->dev,
531 NS_TSQSIZE + NS_TSQ_ALIGNMENT,
532 &card->tsq.dma, GFP_KERNEL);
533 if (card->tsq.org == NULL) {
534 printk("nicstar%d: can't allocate TSQ.\n", i);
535 error = 10;
536 ns_init_card_error(card, error);
537 return error;
538 }
539 card->tsq.base = PTR_ALIGN(card->tsq.org, NS_TSQ_ALIGNMENT);
540 card->tsq.next = card->tsq.base;
541 card->tsq.last = card->tsq.base + (NS_TSQ_NUM_ENTRIES - 1);
542 for (j = 0; j < NS_TSQ_NUM_ENTRIES; j++)
543 ns_tsi_init(card->tsq.base + j);
544 writel(0x00000000, card->membase + TSQH);
545 writel(ALIGN(card->tsq.dma, NS_TSQ_ALIGNMENT), card->membase + TSQB);
546 PRINTK("nicstar%d: TSQ base at 0x%p.\n", i, card->tsq.base);
547
548 /* Initialize RSQ */
549 card->rsq.org = dma_alloc_coherent(&card->pcidev->dev,
550 NS_RSQSIZE + NS_RSQ_ALIGNMENT,
551 &card->rsq.dma, GFP_KERNEL);
552 if (card->rsq.org == NULL) {
553 printk("nicstar%d: can't allocate RSQ.\n", i);
554 error = 11;
555 ns_init_card_error(card, error);
556 return error;
557 }
558 card->rsq.base = PTR_ALIGN(card->rsq.org, NS_RSQ_ALIGNMENT);
559 card->rsq.next = card->rsq.base;
560 card->rsq.last = card->rsq.base + (NS_RSQ_NUM_ENTRIES - 1);
561 for (j = 0; j < NS_RSQ_NUM_ENTRIES; j++)
562 ns_rsqe_init(card->rsq.base + j);
563 writel(0x00000000, card->membase + RSQH);
564 writel(ALIGN(card->rsq.dma, NS_RSQ_ALIGNMENT), card->membase + RSQB);
565 PRINTK("nicstar%d: RSQ base at 0x%p.\n", i, card->rsq.base);
566
567 /* Initialize SCQ0, the only VBR SCQ used */
568 card->scq1 = NULL;
569 card->scq2 = NULL;
570 card->scq0 = get_scq(card, VBR_SCQSIZE, NS_VRSCD0);
571 if (card->scq0 == NULL) {
572 printk("nicstar%d: can't get SCQ0.\n", i);
573 error = 12;
574 ns_init_card_error(card, error);
575 return error;
576 }
577 u32d[0] = scq_virt_to_bus(card->scq0, card->scq0->base);
578 u32d[1] = (u32) 0x00000000;
579 u32d[2] = (u32) 0xffffffff;
580 u32d[3] = (u32) 0x00000000;
581 ns_write_sram(card, NS_VRSCD0, u32d, 4);
582 ns_write_sram(card, NS_VRSCD1, u32d, 4); /* These last two won't be used */
583 ns_write_sram(card, NS_VRSCD2, u32d, 4); /* but are initialized, just in case... */
584 card->scq0->scd = NS_VRSCD0;
585 PRINTK("nicstar%d: VBR-SCQ0 base at 0x%p.\n", i, card->scq0->base);
586
587 /* Initialize TSTs */
588 card->tst_addr = NS_TST0;
589 card->tst_free_entries = NS_TST_NUM_ENTRIES;
590 data = NS_TST_OPCODE_VARIABLE;
591 for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
592 ns_write_sram(card, NS_TST0 + j, &data, 1);
593 data = ns_tste_make(NS_TST_OPCODE_END, NS_TST0);
594 ns_write_sram(card, NS_TST0 + NS_TST_NUM_ENTRIES, &data, 1);
595 for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
596 ns_write_sram(card, NS_TST1 + j, &data, 1);
597 data = ns_tste_make(NS_TST_OPCODE_END, NS_TST1);
598 ns_write_sram(card, NS_TST1 + NS_TST_NUM_ENTRIES, &data, 1);
599 for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
600 card->tste2vc[j] = NULL;
601 writel(NS_TST0 << 2, card->membase + TSTB);
602
603 /* Initialize RCT. AAL type is set on opening the VC. */
604#ifdef RCQ_SUPPORT
605 u32d[0] = NS_RCTE_RAWCELLINTEN;
606#else
607 u32d[0] = 0x00000000;
608#endif /* RCQ_SUPPORT */
609 u32d[1] = 0x00000000;
610 u32d[2] = 0x00000000;
611 u32d[3] = 0xFFFFFFFF;
612 for (j = 0; j < card->rct_size; j++)
613 ns_write_sram(card, j * 4, u32d, 4);
614
615 memset(card->vcmap, 0, sizeof(card->vcmap));
616
617 for (j = 0; j < NS_FRSCD_NUM; j++)
618 card->scd2vc[j] = NULL;
619
620 /* Initialize buffer levels */
621 card->sbnr.min = MIN_SB;
622 card->sbnr.init = NUM_SB;
623 card->sbnr.max = MAX_SB;
624 card->lbnr.min = MIN_LB;
625 card->lbnr.init = NUM_LB;
626 card->lbnr.max = MAX_LB;
627 card->iovnr.min = MIN_IOVB;
628 card->iovnr.init = NUM_IOVB;
629 card->iovnr.max = MAX_IOVB;
630 card->hbnr.min = MIN_HB;
631 card->hbnr.init = NUM_HB;
632 card->hbnr.max = MAX_HB;
633
634 card->sm_handle = NULL;
635 card->sm_addr = 0x00000000;
636 card->lg_handle = NULL;
637 card->lg_addr = 0x00000000;
638
639 card->efbie = 1; /* To prevent push_rxbufs from enabling the interrupt */
640
641 idr_init(&card->idr);
642
643 /* Pre-allocate some huge buffers */
644 skb_queue_head_init(&card->hbpool.queue);
645 card->hbpool.count = 0;
646 for (j = 0; j < NUM_HB; j++) {
647 struct sk_buff *hb;
648 hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
649 if (hb == NULL) {
650 printk
651 ("nicstar%d: can't allocate %dth of %d huge buffers.\n",
652 i, j, NUM_HB);
653 error = 13;
654 ns_init_card_error(card, error);
655 return error;
656 }
657 NS_PRV_BUFTYPE(hb) = BUF_NONE;
658 skb_queue_tail(&card->hbpool.queue, hb);
659 card->hbpool.count++;
660 }
661
662 /* Allocate large buffers */
663 skb_queue_head_init(&card->lbpool.queue);
664 card->lbpool.count = 0; /* Not used */
665 for (j = 0; j < NUM_LB; j++) {
666 struct sk_buff *lb;
667 lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
668 if (lb == NULL) {
669 printk
670 ("nicstar%d: can't allocate %dth of %d large buffers.\n",
671 i, j, NUM_LB);
672 error = 14;
673 ns_init_card_error(card, error);
674 return error;
675 }
676 NS_PRV_BUFTYPE(lb) = BUF_LG;
677 skb_queue_tail(&card->lbpool.queue, lb);
678 skb_reserve(lb, NS_SMBUFSIZE);
679 push_rxbufs(card, lb);
680 /* Due to the implementation of push_rxbufs() this is 1, not 0 */
681 if (j == 1) {
682 card->rcbuf = lb;
683 card->rawcell = (struct ns_rcqe *) lb->data;
684 card->rawch = NS_PRV_DMA(lb);
685 }
686 }
687 /* Test for strange behaviour which leads to crashes */
688 if ((bcount =
689 ns_stat_lfbqc_get(readl(card->membase + STAT))) < card->lbnr.min) {
690 printk
691 ("nicstar%d: Strange... Just allocated %d large buffers and lfbqc = %d.\n",
692 i, j, bcount);
693 error = 14;
694 ns_init_card_error(card, error);
695 return error;
696 }
697
698 /* Allocate small buffers */
699 skb_queue_head_init(&card->sbpool.queue);
700 card->sbpool.count = 0; /* Not used */
701 for (j = 0; j < NUM_SB; j++) {
702 struct sk_buff *sb;
703 sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
704 if (sb == NULL) {
705 printk
706 ("nicstar%d: can't allocate %dth of %d small buffers.\n",
707 i, j, NUM_SB);
708 error = 15;
709 ns_init_card_error(card, error);
710 return error;
711 }
712 NS_PRV_BUFTYPE(sb) = BUF_SM;
713 skb_queue_tail(&card->sbpool.queue, sb);
714 skb_reserve(sb, NS_AAL0_HEADER);
715 push_rxbufs(card, sb);
716 }
717 /* Test for strange behaviour which leads to crashes */
718 if ((bcount =
719 ns_stat_sfbqc_get(readl(card->membase + STAT))) < card->sbnr.min) {
720 printk
721 ("nicstar%d: Strange... Just allocated %d small buffers and sfbqc = %d.\n",
722 i, j, bcount);
723 error = 15;
724 ns_init_card_error(card, error);
725 return error;
726 }
727
728 /* Allocate iovec buffers */
729 skb_queue_head_init(&card->iovpool.queue);
730 card->iovpool.count = 0;
731 for (j = 0; j < NUM_IOVB; j++) {
732 struct sk_buff *iovb;
733 iovb = alloc_skb(NS_IOVBUFSIZE, GFP_KERNEL);
734 if (iovb == NULL) {
735 printk
736 ("nicstar%d: can't allocate %dth of %d iovec buffers.\n",
737 i, j, NUM_IOVB);
738 error = 16;
739 ns_init_card_error(card, error);
740 return error;
741 }
742 NS_PRV_BUFTYPE(iovb) = BUF_NONE;
743 skb_queue_tail(&card->iovpool.queue, iovb);
744 card->iovpool.count++;
745 }
746
747 /* Configure NICStAR */
748 if (card->rct_size == 4096)
749 ns_cfg_rctsize = NS_CFG_RCTSIZE_4096_ENTRIES;
750 else /* (card->rct_size == 16384) */
751 ns_cfg_rctsize = NS_CFG_RCTSIZE_16384_ENTRIES;
752
753 card->efbie = 1;
754
755 card->intcnt = 0;
756 if (request_irq
757 (pcidev->irq, &ns_irq_handler, IRQF_SHARED, "nicstar", card) != 0) {
758 printk("nicstar%d: can't allocate IRQ %d.\n", i, pcidev->irq);
759 error = 9;
760 ns_init_card_error(card, error);
761 return error;
762 }
763
764 /* Register device */
765 card->atmdev = atm_dev_register("nicstar", &card->pcidev->dev, &atm_ops,
766 -1, NULL);
767 if (card->atmdev == NULL) {
768 printk("nicstar%d: can't register device.\n", i);
769 error = 17;
770 ns_init_card_error(card, error);
771 return error;
772 }
773
774 if (mac[i] == NULL || !mac_pton(mac[i], card->atmdev->esi)) {
775 nicstar_read_eprom(card->membase, NICSTAR_EPROM_MAC_ADDR_OFFSET,
776 card->atmdev->esi, 6);
777 if (ether_addr_equal(card->atmdev->esi, "\x00\x00\x00\x00\x00\x00")) {
778 nicstar_read_eprom(card->membase,
779 NICSTAR_EPROM_MAC_ADDR_OFFSET_ALT,
780 card->atmdev->esi, 6);
781 }
782 }
783
784 printk("nicstar%d: MAC address %pM\n", i, card->atmdev->esi);
785
786 card->atmdev->dev_data = card;
787 card->atmdev->ci_range.vpi_bits = card->vpibits;
788 card->atmdev->ci_range.vci_bits = card->vcibits;
789 card->atmdev->link_rate = card->max_pcr;
790 card->atmdev->phy = NULL;
791
792#ifdef CONFIG_ATM_NICSTAR_USE_SUNI
793 if (card->max_pcr == ATM_OC3_PCR)
794 suni_init(card->atmdev);
795#endif /* CONFIG_ATM_NICSTAR_USE_SUNI */
796
797#ifdef CONFIG_ATM_NICSTAR_USE_IDT77105
798 if (card->max_pcr == ATM_25_PCR)
799 idt77105_init(card->atmdev);
800#endif /* CONFIG_ATM_NICSTAR_USE_IDT77105 */
801
802 if (card->atmdev->phy && card->atmdev->phy->start)
803 card->atmdev->phy->start(card->atmdev);
804
805 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 */
806 NS_CFG_RSQAFIE | NS_CFG_TXEN | NS_CFG_TXIE | NS_CFG_TSQFIE_OPT | /* Only enabled if ENABLE_TSQFIE */
807 NS_CFG_PHYIE, card->membase + CFG);
808
809 num_cards++;
810
811 return error;
812}
813
814static void ns_init_card_error(ns_dev *card, int error)
815{
816 if (error >= 17) {
817 writel(0x00000000, card->membase + CFG);
818 }
819 if (error >= 16) {
820 struct sk_buff *iovb;
821 while ((iovb = skb_dequeue(&card->iovpool.queue)) != NULL)
822 dev_kfree_skb_any(iovb);
823 }
824 if (error >= 15) {
825 struct sk_buff *sb;
826 while ((sb = skb_dequeue(&card->sbpool.queue)) != NULL)
827 dev_kfree_skb_any(sb);
828 free_scq(card, card->scq0, NULL);
829 }
830 if (error >= 14) {
831 struct sk_buff *lb;
832 while ((lb = skb_dequeue(&card->lbpool.queue)) != NULL)
833 dev_kfree_skb_any(lb);
834 }
835 if (error >= 13) {
836 struct sk_buff *hb;
837 while ((hb = skb_dequeue(&card->hbpool.queue)) != NULL)
838 dev_kfree_skb_any(hb);
839 }
840 if (error >= 12) {
841 kfree(card->rsq.org);
842 }
843 if (error >= 11) {
844 kfree(card->tsq.org);
845 }
846 if (error >= 10) {
847 free_irq(card->pcidev->irq, card);
848 }
849 if (error >= 4) {
850 iounmap(card->membase);
851 }
852 if (error >= 3) {
853 pci_disable_device(card->pcidev);
854 kfree(card);
855 }
856}
857
858static scq_info *get_scq(ns_dev *card, int size, u32 scd)
859{
860 scq_info *scq;
861 int i;
862
863 if (size != VBR_SCQSIZE && size != CBR_SCQSIZE)
864 return NULL;
865
866 scq = kmalloc(sizeof(*scq), GFP_KERNEL);
867 if (!scq)
868 return NULL;
869 scq->org = dma_alloc_coherent(&card->pcidev->dev,
870 2 * size, &scq->dma, GFP_KERNEL);
871 if (!scq->org) {
872 kfree(scq);
873 return NULL;
874 }
875 scq->skb = kmalloc_array(size / NS_SCQE_SIZE,
876 sizeof(*scq->skb),
877 GFP_KERNEL);
878 if (!scq->skb) {
879 dma_free_coherent(&card->pcidev->dev,
880 2 * size, scq->org, scq->dma);
881 kfree(scq);
882 return NULL;
883 }
884 scq->num_entries = size / NS_SCQE_SIZE;
885 scq->base = PTR_ALIGN(scq->org, size);
886 scq->next = scq->base;
887 scq->last = scq->base + (scq->num_entries - 1);
888 scq->tail = scq->last;
889 scq->scd = scd;
890 scq->num_entries = size / NS_SCQE_SIZE;
891 scq->tbd_count = 0;
892 init_waitqueue_head(&scq->scqfull_waitq);
893 scq->full = 0;
894 spin_lock_init(&scq->lock);
895
896 for (i = 0; i < scq->num_entries; i++)
897 scq->skb[i] = NULL;
898
899 return scq;
900}
901
902/* For variable rate SCQ vcc must be NULL */
903static void free_scq(ns_dev *card, scq_info *scq, struct atm_vcc *vcc)
904{
905 int i;
906
907 if (scq->num_entries == VBR_SCQ_NUM_ENTRIES)
908 for (i = 0; i < scq->num_entries; i++) {
909 if (scq->skb[i] != NULL) {
910 vcc = ATM_SKB(scq->skb[i])->vcc;
911 if (vcc->pop != NULL)
912 vcc->pop(vcc, scq->skb[i]);
913 else
914 dev_kfree_skb_any(scq->skb[i]);
915 }
916 } else { /* vcc must be != NULL */
917
918 if (vcc == NULL) {
919 printk
920 ("nicstar: free_scq() called with vcc == NULL for fixed rate scq.");
921 for (i = 0; i < scq->num_entries; i++)
922 dev_kfree_skb_any(scq->skb[i]);
923 } else
924 for (i = 0; i < scq->num_entries; i++) {
925 if (scq->skb[i] != NULL) {
926 if (vcc->pop != NULL)
927 vcc->pop(vcc, scq->skb[i]);
928 else
929 dev_kfree_skb_any(scq->skb[i]);
930 }
931 }
932 }
933 kfree(scq->skb);
934 dma_free_coherent(&card->pcidev->dev,
935 2 * (scq->num_entries == VBR_SCQ_NUM_ENTRIES ?
936 VBR_SCQSIZE : CBR_SCQSIZE),
937 scq->org, scq->dma);
938 kfree(scq);
939}
940
941/* The handles passed must be pointers to the sk_buff containing the small
942 or large buffer(s) cast to u32. */
943static void push_rxbufs(ns_dev * card, struct sk_buff *skb)
944{
945 struct sk_buff *handle1, *handle2;
946 int id1, id2;
947 u32 addr1, addr2;
948 u32 stat;
949 unsigned long flags;
950
951 /* *BARF* */
952 handle2 = NULL;
953 addr2 = 0;
954 handle1 = skb;
955 addr1 = dma_map_single(&card->pcidev->dev,
956 skb->data,
957 (NS_PRV_BUFTYPE(skb) == BUF_SM
958 ? NS_SMSKBSIZE : NS_LGSKBSIZE),
959 DMA_TO_DEVICE);
960 NS_PRV_DMA(skb) = addr1; /* save so we can unmap later */
961
962#ifdef GENERAL_DEBUG
963 if (!addr1)
964 printk("nicstar%d: push_rxbufs called with addr1 = 0.\n",
965 card->index);
966#endif /* GENERAL_DEBUG */
967
968 stat = readl(card->membase + STAT);
969 card->sbfqc = ns_stat_sfbqc_get(stat);
970 card->lbfqc = ns_stat_lfbqc_get(stat);
971 if (NS_PRV_BUFTYPE(skb) == BUF_SM) {
972 if (!addr2) {
973 if (card->sm_addr) {
974 addr2 = card->sm_addr;
975 handle2 = card->sm_handle;
976 card->sm_addr = 0x00000000;
977 card->sm_handle = NULL;
978 } else { /* (!sm_addr) */
979
980 card->sm_addr = addr1;
981 card->sm_handle = handle1;
982 }
983 }
984 } else { /* buf_type == BUF_LG */
985
986 if (!addr2) {
987 if (card->lg_addr) {
988 addr2 = card->lg_addr;
989 handle2 = card->lg_handle;
990 card->lg_addr = 0x00000000;
991 card->lg_handle = NULL;
992 } else { /* (!lg_addr) */
993
994 card->lg_addr = addr1;
995 card->lg_handle = handle1;
996 }
997 }
998 }
999
1000 if (addr2) {
1001 if (NS_PRV_BUFTYPE(skb) == BUF_SM) {
1002 if (card->sbfqc >= card->sbnr.max) {
1003 skb_unlink(handle1, &card->sbpool.queue);
1004 dev_kfree_skb_any(handle1);
1005 skb_unlink(handle2, &card->sbpool.queue);
1006 dev_kfree_skb_any(handle2);
1007 return;
1008 } else
1009 card->sbfqc += 2;
1010 } else { /* (buf_type == BUF_LG) */
1011
1012 if (card->lbfqc >= card->lbnr.max) {
1013 skb_unlink(handle1, &card->lbpool.queue);
1014 dev_kfree_skb_any(handle1);
1015 skb_unlink(handle2, &card->lbpool.queue);
1016 dev_kfree_skb_any(handle2);
1017 return;
1018 } else
1019 card->lbfqc += 2;
1020 }
1021
1022 id1 = idr_alloc(&card->idr, handle1, 0, 0, GFP_ATOMIC);
1023 if (id1 < 0)
1024 goto out;
1025
1026 id2 = idr_alloc(&card->idr, handle2, 0, 0, GFP_ATOMIC);
1027 if (id2 < 0)
1028 goto out;
1029
1030 spin_lock_irqsave(&card->res_lock, flags);
1031 while (CMD_BUSY(card)) ;
1032 writel(addr2, card->membase + DR3);
1033 writel(id2, card->membase + DR2);
1034 writel(addr1, card->membase + DR1);
1035 writel(id1, card->membase + DR0);
1036 writel(NS_CMD_WRITE_FREEBUFQ | NS_PRV_BUFTYPE(skb),
1037 card->membase + CMD);
1038 spin_unlock_irqrestore(&card->res_lock, flags);
1039
1040 XPRINTK("nicstar%d: Pushing %s buffers at 0x%x and 0x%x.\n",
1041 card->index,
1042 (NS_PRV_BUFTYPE(skb) == BUF_SM ? "small" : "large"),
1043 addr1, addr2);
1044 }
1045
1046 if (!card->efbie && card->sbfqc >= card->sbnr.min &&
1047 card->lbfqc >= card->lbnr.min) {
1048 card->efbie = 1;
1049 writel((readl(card->membase + CFG) | NS_CFG_EFBIE),
1050 card->membase + CFG);
1051 }
1052
1053out:
1054 return;
1055}
1056
1057static irqreturn_t ns_irq_handler(int irq, void *dev_id)
1058{
1059 u32 stat_r;
1060 ns_dev *card;
1061 struct atm_dev *dev;
1062 unsigned long flags;
1063
1064 card = (ns_dev *) dev_id;
1065 dev = card->atmdev;
1066 card->intcnt++;
1067
1068 PRINTK("nicstar%d: NICStAR generated an interrupt\n", card->index);
1069
1070 spin_lock_irqsave(&card->int_lock, flags);
1071
1072 stat_r = readl(card->membase + STAT);
1073
1074 /* Transmit Status Indicator has been written to T. S. Queue */
1075 if (stat_r & NS_STAT_TSIF) {
1076 TXPRINTK("nicstar%d: TSI interrupt\n", card->index);
1077 process_tsq(card);
1078 writel(NS_STAT_TSIF, card->membase + STAT);
1079 }
1080
1081 /* Incomplete CS-PDU has been transmitted */
1082 if (stat_r & NS_STAT_TXICP) {
1083 writel(NS_STAT_TXICP, card->membase + STAT);
1084 TXPRINTK("nicstar%d: Incomplete CS-PDU transmitted.\n",
1085 card->index);
1086 }
1087
1088 /* Transmit Status Queue 7/8 full */
1089 if (stat_r & NS_STAT_TSQF) {
1090 writel(NS_STAT_TSQF, card->membase + STAT);
1091 PRINTK("nicstar%d: TSQ full.\n", card->index);
1092 process_tsq(card);
1093 }
1094
1095 /* Timer overflow */
1096 if (stat_r & NS_STAT_TMROF) {
1097 writel(NS_STAT_TMROF, card->membase + STAT);
1098 PRINTK("nicstar%d: Timer overflow.\n", card->index);
1099 }
1100
1101 /* PHY device interrupt signal active */
1102 if (stat_r & NS_STAT_PHYI) {
1103 writel(NS_STAT_PHYI, card->membase + STAT);
1104 PRINTK("nicstar%d: PHY interrupt.\n", card->index);
1105 if (dev->phy && dev->phy->interrupt) {
1106 dev->phy->interrupt(dev);
1107 }
1108 }
1109
1110 /* Small Buffer Queue is full */
1111 if (stat_r & NS_STAT_SFBQF) {
1112 writel(NS_STAT_SFBQF, card->membase + STAT);
1113 printk("nicstar%d: Small free buffer queue is full.\n",
1114 card->index);
1115 }
1116
1117 /* Large Buffer Queue is full */
1118 if (stat_r & NS_STAT_LFBQF) {
1119 writel(NS_STAT_LFBQF, card->membase + STAT);
1120 printk("nicstar%d: Large free buffer queue is full.\n",
1121 card->index);
1122 }
1123
1124 /* Receive Status Queue is full */
1125 if (stat_r & NS_STAT_RSQF) {
1126 writel(NS_STAT_RSQF, card->membase + STAT);
1127 printk("nicstar%d: RSQ full.\n", card->index);
1128 process_rsq(card);
1129 }
1130
1131 /* Complete CS-PDU received */
1132 if (stat_r & NS_STAT_EOPDU) {
1133 RXPRINTK("nicstar%d: End of CS-PDU received.\n", card->index);
1134 process_rsq(card);
1135 writel(NS_STAT_EOPDU, card->membase + STAT);
1136 }
1137
1138 /* Raw cell received */
1139 if (stat_r & NS_STAT_RAWCF) {
1140 writel(NS_STAT_RAWCF, card->membase + STAT);
1141#ifndef RCQ_SUPPORT
1142 printk("nicstar%d: Raw cell received and no support yet...\n",
1143 card->index);
1144#endif /* RCQ_SUPPORT */
1145 /* NOTE: the following procedure may keep a raw cell pending until the
1146 next interrupt. As this preliminary support is only meant to
1147 avoid buffer leakage, this is not an issue. */
1148 while (readl(card->membase + RAWCT) != card->rawch) {
1149
1150 if (ns_rcqe_islast(card->rawcell)) {
1151 struct sk_buff *oldbuf;
1152
1153 oldbuf = card->rcbuf;
1154 card->rcbuf = idr_find(&card->idr,
1155 ns_rcqe_nextbufhandle(card->rawcell));
1156 card->rawch = NS_PRV_DMA(card->rcbuf);
1157 card->rawcell = (struct ns_rcqe *)
1158 card->rcbuf->data;
1159 recycle_rx_buf(card, oldbuf);
1160 } else {
1161 card->rawch += NS_RCQE_SIZE;
1162 card->rawcell++;
1163 }
1164 }
1165 }
1166
1167 /* Small buffer queue is empty */
1168 if (stat_r & NS_STAT_SFBQE) {
1169 int i;
1170 struct sk_buff *sb;
1171
1172 writel(NS_STAT_SFBQE, card->membase + STAT);
1173 printk("nicstar%d: Small free buffer queue empty.\n",
1174 card->index);
1175 for (i = 0; i < card->sbnr.min; i++) {
1176 sb = dev_alloc_skb(NS_SMSKBSIZE);
1177 if (sb == NULL) {
1178 writel(readl(card->membase + CFG) &
1179 ~NS_CFG_EFBIE, card->membase + CFG);
1180 card->efbie = 0;
1181 break;
1182 }
1183 NS_PRV_BUFTYPE(sb) = BUF_SM;
1184 skb_queue_tail(&card->sbpool.queue, sb);
1185 skb_reserve(sb, NS_AAL0_HEADER);
1186 push_rxbufs(card, sb);
1187 }
1188 card->sbfqc = i;
1189 process_rsq(card);
1190 }
1191
1192 /* Large buffer queue empty */
1193 if (stat_r & NS_STAT_LFBQE) {
1194 int i;
1195 struct sk_buff *lb;
1196
1197 writel(NS_STAT_LFBQE, card->membase + STAT);
1198 printk("nicstar%d: Large free buffer queue empty.\n",
1199 card->index);
1200 for (i = 0; i < card->lbnr.min; i++) {
1201 lb = dev_alloc_skb(NS_LGSKBSIZE);
1202 if (lb == NULL) {
1203 writel(readl(card->membase + CFG) &
1204 ~NS_CFG_EFBIE, card->membase + CFG);
1205 card->efbie = 0;
1206 break;
1207 }
1208 NS_PRV_BUFTYPE(lb) = BUF_LG;
1209 skb_queue_tail(&card->lbpool.queue, lb);
1210 skb_reserve(lb, NS_SMBUFSIZE);
1211 push_rxbufs(card, lb);
1212 }
1213 card->lbfqc = i;
1214 process_rsq(card);
1215 }
1216
1217 /* Receive Status Queue is 7/8 full */
1218 if (stat_r & NS_STAT_RSQAF) {
1219 writel(NS_STAT_RSQAF, card->membase + STAT);
1220 RXPRINTK("nicstar%d: RSQ almost full.\n", card->index);
1221 process_rsq(card);
1222 }
1223
1224 spin_unlock_irqrestore(&card->int_lock, flags);
1225 PRINTK("nicstar%d: end of interrupt service\n", card->index);
1226 return IRQ_HANDLED;
1227}
1228
1229static int ns_open(struct atm_vcc *vcc)
1230{
1231 ns_dev *card;
1232 vc_map *vc;
1233 unsigned long tmpl, modl;
1234 int tcr, tcra; /* target cell rate, and absolute value */
1235 int n = 0; /* Number of entries in the TST. Initialized to remove
1236 the compiler warning. */
1237 u32 u32d[4];
1238 int frscdi = 0; /* Index of the SCD. Initialized to remove the compiler
1239 warning. How I wish compilers were clever enough to
1240 tell which variables can truly be used
1241 uninitialized... */
1242 int inuse; /* tx or rx vc already in use by another vcc */
1243 short vpi = vcc->vpi;
1244 int vci = vcc->vci;
1245
1246 card = (ns_dev *) vcc->dev->dev_data;
1247 PRINTK("nicstar%d: opening vpi.vci %d.%d \n", card->index, (int)vpi,
1248 vci);
1249 if (vcc->qos.aal != ATM_AAL5 && vcc->qos.aal != ATM_AAL0) {
1250 PRINTK("nicstar%d: unsupported AAL.\n", card->index);
1251 return -EINVAL;
1252 }
1253
1254 vc = &(card->vcmap[vpi << card->vcibits | vci]);
1255 vcc->dev_data = vc;
1256
1257 inuse = 0;
1258 if (vcc->qos.txtp.traffic_class != ATM_NONE && vc->tx)
1259 inuse = 1;
1260 if (vcc->qos.rxtp.traffic_class != ATM_NONE && vc->rx)
1261 inuse += 2;
1262 if (inuse) {
1263 printk("nicstar%d: %s vci already in use.\n", card->index,
1264 inuse == 1 ? "tx" : inuse == 2 ? "rx" : "tx and rx");
1265 return -EINVAL;
1266 }
1267
1268 set_bit(ATM_VF_ADDR, &vcc->flags);
1269
1270 /* NOTE: You are not allowed to modify an open connection's QOS. To change
1271 that, remove the ATM_VF_PARTIAL flag checking. There may be other changes
1272 needed to do that. */
1273 if (!test_bit(ATM_VF_PARTIAL, &vcc->flags)) {
1274 scq_info *scq;
1275
1276 set_bit(ATM_VF_PARTIAL, &vcc->flags);
1277 if (vcc->qos.txtp.traffic_class == ATM_CBR) {
1278 /* Check requested cell rate and availability of SCD */
1279 if (vcc->qos.txtp.max_pcr == 0 && vcc->qos.txtp.pcr == 0
1280 && vcc->qos.txtp.min_pcr == 0) {
1281 PRINTK
1282 ("nicstar%d: trying to open a CBR vc with cell rate = 0 \n",
1283 card->index);
1284 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1285 clear_bit(ATM_VF_ADDR, &vcc->flags);
1286 return -EINVAL;
1287 }
1288
1289 tcr = atm_pcr_goal(&(vcc->qos.txtp));
1290 tcra = tcr >= 0 ? tcr : -tcr;
1291
1292 PRINTK("nicstar%d: target cell rate = %d.\n",
1293 card->index, vcc->qos.txtp.max_pcr);
1294
1295 tmpl =
1296 (unsigned long)tcra *(unsigned long)
1297 NS_TST_NUM_ENTRIES;
1298 modl = tmpl % card->max_pcr;
1299
1300 n = (int)(tmpl / card->max_pcr);
1301 if (tcr > 0) {
1302 if (modl > 0)
1303 n++;
1304 } else if (tcr == 0) {
1305 if ((n =
1306 (card->tst_free_entries -
1307 NS_TST_RESERVED)) <= 0) {
1308 PRINTK
1309 ("nicstar%d: no CBR bandwidth free.\n",
1310 card->index);
1311 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1312 clear_bit(ATM_VF_ADDR, &vcc->flags);
1313 return -EINVAL;
1314 }
1315 }
1316
1317 if (n == 0) {
1318 printk
1319 ("nicstar%d: selected bandwidth < granularity.\n",
1320 card->index);
1321 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1322 clear_bit(ATM_VF_ADDR, &vcc->flags);
1323 return -EINVAL;
1324 }
1325
1326 if (n > (card->tst_free_entries - NS_TST_RESERVED)) {
1327 PRINTK
1328 ("nicstar%d: not enough free CBR bandwidth.\n",
1329 card->index);
1330 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1331 clear_bit(ATM_VF_ADDR, &vcc->flags);
1332 return -EINVAL;
1333 } else
1334 card->tst_free_entries -= n;
1335
1336 XPRINTK("nicstar%d: writing %d tst entries.\n",
1337 card->index, n);
1338 for (frscdi = 0; frscdi < NS_FRSCD_NUM; frscdi++) {
1339 if (card->scd2vc[frscdi] == NULL) {
1340 card->scd2vc[frscdi] = vc;
1341 break;
1342 }
1343 }
1344 if (frscdi == NS_FRSCD_NUM) {
1345 PRINTK
1346 ("nicstar%d: no SCD available for CBR channel.\n",
1347 card->index);
1348 card->tst_free_entries += n;
1349 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1350 clear_bit(ATM_VF_ADDR, &vcc->flags);
1351 return -EBUSY;
1352 }
1353
1354 vc->cbr_scd = NS_FRSCD + frscdi * NS_FRSCD_SIZE;
1355
1356 scq = get_scq(card, CBR_SCQSIZE, vc->cbr_scd);
1357 if (scq == NULL) {
1358 PRINTK("nicstar%d: can't get fixed rate SCQ.\n",
1359 card->index);
1360 card->scd2vc[frscdi] = NULL;
1361 card->tst_free_entries += n;
1362 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1363 clear_bit(ATM_VF_ADDR, &vcc->flags);
1364 return -ENOMEM;
1365 }
1366 vc->scq = scq;
1367 u32d[0] = scq_virt_to_bus(scq, scq->base);
1368 u32d[1] = (u32) 0x00000000;
1369 u32d[2] = (u32) 0xffffffff;
1370 u32d[3] = (u32) 0x00000000;
1371 ns_write_sram(card, vc->cbr_scd, u32d, 4);
1372
1373 fill_tst(card, n, vc);
1374 } else if (vcc->qos.txtp.traffic_class == ATM_UBR) {
1375 vc->cbr_scd = 0x00000000;
1376 vc->scq = card->scq0;
1377 }
1378
1379 if (vcc->qos.txtp.traffic_class != ATM_NONE) {
1380 vc->tx = 1;
1381 vc->tx_vcc = vcc;
1382 vc->tbd_count = 0;
1383 }
1384 if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
1385 u32 status;
1386
1387 vc->rx = 1;
1388 vc->rx_vcc = vcc;
1389 vc->rx_iov = NULL;
1390
1391 /* Open the connection in hardware */
1392 if (vcc->qos.aal == ATM_AAL5)
1393 status = NS_RCTE_AAL5 | NS_RCTE_CONNECTOPEN;
1394 else /* vcc->qos.aal == ATM_AAL0 */
1395 status = NS_RCTE_AAL0 | NS_RCTE_CONNECTOPEN;
1396#ifdef RCQ_SUPPORT
1397 status |= NS_RCTE_RAWCELLINTEN;
1398#endif /* RCQ_SUPPORT */
1399 ns_write_sram(card,
1400 NS_RCT +
1401 (vpi << card->vcibits | vci) *
1402 NS_RCT_ENTRY_SIZE, &status, 1);
1403 }
1404
1405 }
1406
1407 set_bit(ATM_VF_READY, &vcc->flags);
1408 return 0;
1409}
1410
1411static void ns_close(struct atm_vcc *vcc)
1412{
1413 vc_map *vc;
1414 ns_dev *card;
1415 u32 data;
1416 int i;
1417
1418 vc = vcc->dev_data;
1419 card = vcc->dev->dev_data;
1420 PRINTK("nicstar%d: closing vpi.vci %d.%d \n", card->index,
1421 (int)vcc->vpi, vcc->vci);
1422
1423 clear_bit(ATM_VF_READY, &vcc->flags);
1424
1425 if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
1426 u32 addr;
1427 unsigned long flags;
1428
1429 addr =
1430 NS_RCT +
1431 (vcc->vpi << card->vcibits | vcc->vci) * NS_RCT_ENTRY_SIZE;
1432 spin_lock_irqsave(&card->res_lock, flags);
1433 while (CMD_BUSY(card)) ;
1434 writel(NS_CMD_CLOSE_CONNECTION | addr << 2,
1435 card->membase + CMD);
1436 spin_unlock_irqrestore(&card->res_lock, flags);
1437
1438 vc->rx = 0;
1439 if (vc->rx_iov != NULL) {
1440 struct sk_buff *iovb;
1441 u32 stat;
1442
1443 stat = readl(card->membase + STAT);
1444 card->sbfqc = ns_stat_sfbqc_get(stat);
1445 card->lbfqc = ns_stat_lfbqc_get(stat);
1446
1447 PRINTK
1448 ("nicstar%d: closing a VC with pending rx buffers.\n",
1449 card->index);
1450 iovb = vc->rx_iov;
1451 recycle_iovec_rx_bufs(card, (struct iovec *)iovb->data,
1452 NS_PRV_IOVCNT(iovb));
1453 NS_PRV_IOVCNT(iovb) = 0;
1454 spin_lock_irqsave(&card->int_lock, flags);
1455 recycle_iov_buf(card, iovb);
1456 spin_unlock_irqrestore(&card->int_lock, flags);
1457 vc->rx_iov = NULL;
1458 }
1459 }
1460
1461 if (vcc->qos.txtp.traffic_class != ATM_NONE) {
1462 vc->tx = 0;
1463 }
1464
1465 if (vcc->qos.txtp.traffic_class == ATM_CBR) {
1466 unsigned long flags;
1467 ns_scqe *scqep;
1468 scq_info *scq;
1469
1470 scq = vc->scq;
1471
1472 for (;;) {
1473 spin_lock_irqsave(&scq->lock, flags);
1474 scqep = scq->next;
1475 if (scqep == scq->base)
1476 scqep = scq->last;
1477 else
1478 scqep--;
1479 if (scqep == scq->tail) {
1480 spin_unlock_irqrestore(&scq->lock, flags);
1481 break;
1482 }
1483 /* If the last entry is not a TSR, place one in the SCQ in order to
1484 be able to completely drain it and then close. */
1485 if (!ns_scqe_is_tsr(scqep) && scq->tail != scq->next) {
1486 ns_scqe tsr;
1487 u32 scdi, scqi;
1488 u32 data;
1489 int index;
1490
1491 tsr.word_1 = ns_tsr_mkword_1(NS_TSR_INTENABLE);
1492 scdi = (vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE;
1493 scqi = scq->next - scq->base;
1494 tsr.word_2 = ns_tsr_mkword_2(scdi, scqi);
1495 tsr.word_3 = 0x00000000;
1496 tsr.word_4 = 0x00000000;
1497 *scq->next = tsr;
1498 index = (int)scqi;
1499 scq->skb[index] = NULL;
1500 if (scq->next == scq->last)
1501 scq->next = scq->base;
1502 else
1503 scq->next++;
1504 data = scq_virt_to_bus(scq, scq->next);
1505 ns_write_sram(card, scq->scd, &data, 1);
1506 }
1507 spin_unlock_irqrestore(&scq->lock, flags);
1508 schedule();
1509 }
1510
1511 /* Free all TST entries */
1512 data = NS_TST_OPCODE_VARIABLE;
1513 for (i = 0; i < NS_TST_NUM_ENTRIES; i++) {
1514 if (card->tste2vc[i] == vc) {
1515 ns_write_sram(card, card->tst_addr + i, &data,
1516 1);
1517 card->tste2vc[i] = NULL;
1518 card->tst_free_entries++;
1519 }
1520 }
1521
1522 card->scd2vc[(vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE] = NULL;
1523 free_scq(card, vc->scq, vcc);
1524 }
1525
1526 /* remove all references to vcc before deleting it */
1527 if (vcc->qos.txtp.traffic_class != ATM_NONE) {
1528 unsigned long flags;
1529 scq_info *scq = card->scq0;
1530
1531 spin_lock_irqsave(&scq->lock, flags);
1532
1533 for (i = 0; i < scq->num_entries; i++) {
1534 if (scq->skb[i] && ATM_SKB(scq->skb[i])->vcc == vcc) {
1535 ATM_SKB(scq->skb[i])->vcc = NULL;
1536 atm_return(vcc, scq->skb[i]->truesize);
1537 PRINTK
1538 ("nicstar: deleted pending vcc mapping\n");
1539 }
1540 }
1541
1542 spin_unlock_irqrestore(&scq->lock, flags);
1543 }
1544
1545 vcc->dev_data = NULL;
1546 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1547 clear_bit(ATM_VF_ADDR, &vcc->flags);
1548
1549#ifdef RX_DEBUG
1550 {
1551 u32 stat, cfg;
1552 stat = readl(card->membase + STAT);
1553 cfg = readl(card->membase + CFG);
1554 printk("STAT = 0x%08X CFG = 0x%08X \n", stat, cfg);
1555 printk
1556 ("TSQ: base = 0x%p next = 0x%p last = 0x%p TSQT = 0x%08X \n",
1557 card->tsq.base, card->tsq.next,
1558 card->tsq.last, readl(card->membase + TSQT));
1559 printk
1560 ("RSQ: base = 0x%p next = 0x%p last = 0x%p RSQT = 0x%08X \n",
1561 card->rsq.base, card->rsq.next,
1562 card->rsq.last, readl(card->membase + RSQT));
1563 printk("Empty free buffer queue interrupt %s \n",
1564 card->efbie ? "enabled" : "disabled");
1565 printk("SBCNT = %d count = %d LBCNT = %d count = %d \n",
1566 ns_stat_sfbqc_get(stat), card->sbpool.count,
1567 ns_stat_lfbqc_get(stat), card->lbpool.count);
1568 printk("hbpool.count = %d iovpool.count = %d \n",
1569 card->hbpool.count, card->iovpool.count);
1570 }
1571#endif /* RX_DEBUG */
1572}
1573
1574static void fill_tst(ns_dev * card, int n, vc_map * vc)
1575{
1576 u32 new_tst;
1577 unsigned long cl;
1578 int e, r;
1579 u32 data;
1580
1581 /* It would be very complicated to keep the two TSTs synchronized while
1582 assuring that writes are only made to the inactive TST. So, for now I
1583 will use only one TST. If problems occur, I will change this again */
1584
1585 new_tst = card->tst_addr;
1586
1587 /* Fill procedure */
1588
1589 for (e = 0; e < NS_TST_NUM_ENTRIES; e++) {
1590 if (card->tste2vc[e] == NULL)
1591 break;
1592 }
1593 if (e == NS_TST_NUM_ENTRIES) {
1594 printk("nicstar%d: No free TST entries found. \n", card->index);
1595 return;
1596 }
1597
1598 r = n;
1599 cl = NS_TST_NUM_ENTRIES;
1600 data = ns_tste_make(NS_TST_OPCODE_FIXED, vc->cbr_scd);
1601
1602 while (r > 0) {
1603 if (cl >= NS_TST_NUM_ENTRIES && card->tste2vc[e] == NULL) {
1604 card->tste2vc[e] = vc;
1605 ns_write_sram(card, new_tst + e, &data, 1);
1606 cl -= NS_TST_NUM_ENTRIES;
1607 r--;
1608 }
1609
1610 if (++e == NS_TST_NUM_ENTRIES) {
1611 e = 0;
1612 }
1613 cl += n;
1614 }
1615
1616 /* End of fill procedure */
1617
1618 data = ns_tste_make(NS_TST_OPCODE_END, new_tst);
1619 ns_write_sram(card, new_tst + NS_TST_NUM_ENTRIES, &data, 1);
1620 ns_write_sram(card, card->tst_addr + NS_TST_NUM_ENTRIES, &data, 1);
1621 card->tst_addr = new_tst;
1622}
1623
1624static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb)
1625{
1626 ns_dev *card;
1627 vc_map *vc;
1628 scq_info *scq;
1629 unsigned long buflen;
1630 ns_scqe scqe;
1631 u32 flags; /* TBD flags, not CPU flags */
1632
1633 card = vcc->dev->dev_data;
1634 TXPRINTK("nicstar%d: ns_send() called.\n", card->index);
1635 if ((vc = (vc_map *) vcc->dev_data) == NULL) {
1636 printk("nicstar%d: vcc->dev_data == NULL on ns_send().\n",
1637 card->index);
1638 atomic_inc(&vcc->stats->tx_err);
1639 dev_kfree_skb_any(skb);
1640 return -EINVAL;
1641 }
1642
1643 if (!vc->tx) {
1644 printk("nicstar%d: Trying to transmit on a non-tx VC.\n",
1645 card->index);
1646 atomic_inc(&vcc->stats->tx_err);
1647 dev_kfree_skb_any(skb);
1648 return -EINVAL;
1649 }
1650
1651 if (vcc->qos.aal != ATM_AAL5 && vcc->qos.aal != ATM_AAL0) {
1652 printk("nicstar%d: Only AAL0 and AAL5 are supported.\n",
1653 card->index);
1654 atomic_inc(&vcc->stats->tx_err);
1655 dev_kfree_skb_any(skb);
1656 return -EINVAL;
1657 }
1658
1659 if (skb_shinfo(skb)->nr_frags != 0) {
1660 printk("nicstar%d: No scatter-gather yet.\n", card->index);
1661 atomic_inc(&vcc->stats->tx_err);
1662 dev_kfree_skb_any(skb);
1663 return -EINVAL;
1664 }
1665
1666 ATM_SKB(skb)->vcc = vcc;
1667
1668 NS_PRV_DMA(skb) = dma_map_single(&card->pcidev->dev, skb->data,
1669 skb->len, DMA_TO_DEVICE);
1670
1671 if (vcc->qos.aal == ATM_AAL5) {
1672 buflen = (skb->len + 47 + 8) / 48 * 48; /* Multiple of 48 */
1673 flags = NS_TBD_AAL5;
1674 scqe.word_2 = cpu_to_le32(NS_PRV_DMA(skb));
1675 scqe.word_3 = cpu_to_le32(skb->len);
1676 scqe.word_4 =
1677 ns_tbd_mkword_4(0, (u32) vcc->vpi, (u32) vcc->vci, 0,
1678 ATM_SKB(skb)->
1679 atm_options & ATM_ATMOPT_CLP ? 1 : 0);
1680 flags |= NS_TBD_EOPDU;
1681 } else { /* (vcc->qos.aal == ATM_AAL0) */
1682
1683 buflen = ATM_CELL_PAYLOAD; /* i.e., 48 bytes */
1684 flags = NS_TBD_AAL0;
1685 scqe.word_2 = cpu_to_le32(NS_PRV_DMA(skb) + NS_AAL0_HEADER);
1686 scqe.word_3 = cpu_to_le32(0x00000000);
1687 if (*skb->data & 0x02) /* Payload type 1 - end of pdu */
1688 flags |= NS_TBD_EOPDU;
1689 scqe.word_4 =
1690 cpu_to_le32(*((u32 *) skb->data) & ~NS_TBD_VC_MASK);
1691 /* Force the VPI/VCI to be the same as in VCC struct */
1692 scqe.word_4 |=
1693 cpu_to_le32((((u32) vcc->
1694 vpi) << NS_TBD_VPI_SHIFT | ((u32) vcc->
1695 vci) <<
1696 NS_TBD_VCI_SHIFT) & NS_TBD_VC_MASK);
1697 }
1698
1699 if (vcc->qos.txtp.traffic_class == ATM_CBR) {
1700 scqe.word_1 = ns_tbd_mkword_1_novbr(flags, (u32) buflen);
1701 scq = ((vc_map *) vcc->dev_data)->scq;
1702 } else {
1703 scqe.word_1 =
1704 ns_tbd_mkword_1(flags, (u32) 1, (u32) 1, (u32) buflen);
1705 scq = card->scq0;
1706 }
1707
1708 if (push_scqe(card, vc, scq, &scqe, skb) != 0) {
1709 atomic_inc(&vcc->stats->tx_err);
1710 dev_kfree_skb_any(skb);
1711 return -EIO;
1712 }
1713 atomic_inc(&vcc->stats->tx);
1714
1715 return 0;
1716}
1717
1718static int push_scqe(ns_dev * card, vc_map * vc, scq_info * scq, ns_scqe * tbd,
1719 struct sk_buff *skb)
1720{
1721 unsigned long flags;
1722 ns_scqe tsr;
1723 u32 scdi, scqi;
1724 int scq_is_vbr;
1725 u32 data;
1726 int index;
1727
1728 spin_lock_irqsave(&scq->lock, flags);
1729 while (scq->tail == scq->next) {
1730 if (in_interrupt()) {
1731 spin_unlock_irqrestore(&scq->lock, flags);
1732 printk("nicstar%d: Error pushing TBD.\n", card->index);
1733 return 1;
1734 }
1735
1736 scq->full = 1;
1737 wait_event_interruptible_lock_irq_timeout(scq->scqfull_waitq,
1738 scq->tail != scq->next,
1739 scq->lock,
1740 SCQFULL_TIMEOUT);
1741
1742 if (scq->full) {
1743 spin_unlock_irqrestore(&scq->lock, flags);
1744 printk("nicstar%d: Timeout pushing TBD.\n",
1745 card->index);
1746 return 1;
1747 }
1748 }
1749 *scq->next = *tbd;
1750 index = (int)(scq->next - scq->base);
1751 scq->skb[index] = skb;
1752 XPRINTK("nicstar%d: sending skb at 0x%p (pos %d).\n",
1753 card->index, skb, index);
1754 XPRINTK("nicstar%d: TBD written:\n0x%x\n0x%x\n0x%x\n0x%x\n at 0x%p.\n",
1755 card->index, le32_to_cpu(tbd->word_1), le32_to_cpu(tbd->word_2),
1756 le32_to_cpu(tbd->word_3), le32_to_cpu(tbd->word_4),
1757 scq->next);
1758 if (scq->next == scq->last)
1759 scq->next = scq->base;
1760 else
1761 scq->next++;
1762
1763 vc->tbd_count++;
1764 if (scq->num_entries == VBR_SCQ_NUM_ENTRIES) {
1765 scq->tbd_count++;
1766 scq_is_vbr = 1;
1767 } else
1768 scq_is_vbr = 0;
1769
1770 if (vc->tbd_count >= MAX_TBD_PER_VC
1771 || scq->tbd_count >= MAX_TBD_PER_SCQ) {
1772 int has_run = 0;
1773
1774 while (scq->tail == scq->next) {
1775 if (in_interrupt()) {
1776 data = scq_virt_to_bus(scq, scq->next);
1777 ns_write_sram(card, scq->scd, &data, 1);
1778 spin_unlock_irqrestore(&scq->lock, flags);
1779 printk("nicstar%d: Error pushing TSR.\n",
1780 card->index);
1781 return 0;
1782 }
1783
1784 scq->full = 1;
1785 if (has_run++)
1786 break;
1787 wait_event_interruptible_lock_irq_timeout(scq->scqfull_waitq,
1788 scq->tail != scq->next,
1789 scq->lock,
1790 SCQFULL_TIMEOUT);
1791 }
1792
1793 if (!scq->full) {
1794 tsr.word_1 = ns_tsr_mkword_1(NS_TSR_INTENABLE);
1795 if (scq_is_vbr)
1796 scdi = NS_TSR_SCDISVBR;
1797 else
1798 scdi = (vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE;
1799 scqi = scq->next - scq->base;
1800 tsr.word_2 = ns_tsr_mkword_2(scdi, scqi);
1801 tsr.word_3 = 0x00000000;
1802 tsr.word_4 = 0x00000000;
1803
1804 *scq->next = tsr;
1805 index = (int)scqi;
1806 scq->skb[index] = NULL;
1807 XPRINTK
1808 ("nicstar%d: TSR written:\n0x%x\n0x%x\n0x%x\n0x%x\n at 0x%p.\n",
1809 card->index, le32_to_cpu(tsr.word_1),
1810 le32_to_cpu(tsr.word_2), le32_to_cpu(tsr.word_3),
1811 le32_to_cpu(tsr.word_4), scq->next);
1812 if (scq->next == scq->last)
1813 scq->next = scq->base;
1814 else
1815 scq->next++;
1816 vc->tbd_count = 0;
1817 scq->tbd_count = 0;
1818 } else
1819 PRINTK("nicstar%d: Timeout pushing TSR.\n",
1820 card->index);
1821 }
1822 data = scq_virt_to_bus(scq, scq->next);
1823 ns_write_sram(card, scq->scd, &data, 1);
1824
1825 spin_unlock_irqrestore(&scq->lock, flags);
1826
1827 return 0;
1828}
1829
1830static void process_tsq(ns_dev * card)
1831{
1832 u32 scdi;
1833 scq_info *scq;
1834 ns_tsi *previous = NULL, *one_ahead, *two_ahead;
1835 int serviced_entries; /* flag indicating at least on entry was serviced */
1836
1837 serviced_entries = 0;
1838
1839 if (card->tsq.next == card->tsq.last)
1840 one_ahead = card->tsq.base;
1841 else
1842 one_ahead = card->tsq.next + 1;
1843
1844 if (one_ahead == card->tsq.last)
1845 two_ahead = card->tsq.base;
1846 else
1847 two_ahead = one_ahead + 1;
1848
1849 while (!ns_tsi_isempty(card->tsq.next) || !ns_tsi_isempty(one_ahead) ||
1850 !ns_tsi_isempty(two_ahead))
1851 /* At most two empty, as stated in the 77201 errata */
1852 {
1853 serviced_entries = 1;
1854
1855 /* Skip the one or two possible empty entries */
1856 while (ns_tsi_isempty(card->tsq.next)) {
1857 if (card->tsq.next == card->tsq.last)
1858 card->tsq.next = card->tsq.base;
1859 else
1860 card->tsq.next++;
1861 }
1862
1863 if (!ns_tsi_tmrof(card->tsq.next)) {
1864 scdi = ns_tsi_getscdindex(card->tsq.next);
1865 if (scdi == NS_TSI_SCDISVBR)
1866 scq = card->scq0;
1867 else {
1868 if (card->scd2vc[scdi] == NULL) {
1869 printk
1870 ("nicstar%d: could not find VC from SCD index.\n",
1871 card->index);
1872 ns_tsi_init(card->tsq.next);
1873 return;
1874 }
1875 scq = card->scd2vc[scdi]->scq;
1876 }
1877 drain_scq(card, scq, ns_tsi_getscqpos(card->tsq.next));
1878 scq->full = 0;
1879 wake_up_interruptible(&(scq->scqfull_waitq));
1880 }
1881
1882 ns_tsi_init(card->tsq.next);
1883 previous = card->tsq.next;
1884 if (card->tsq.next == card->tsq.last)
1885 card->tsq.next = card->tsq.base;
1886 else
1887 card->tsq.next++;
1888
1889 if (card->tsq.next == card->tsq.last)
1890 one_ahead = card->tsq.base;
1891 else
1892 one_ahead = card->tsq.next + 1;
1893
1894 if (one_ahead == card->tsq.last)
1895 two_ahead = card->tsq.base;
1896 else
1897 two_ahead = one_ahead + 1;
1898 }
1899
1900 if (serviced_entries)
1901 writel(PTR_DIFF(previous, card->tsq.base),
1902 card->membase + TSQH);
1903}
1904
1905static void drain_scq(ns_dev * card, scq_info * scq, int pos)
1906{
1907 struct atm_vcc *vcc;
1908 struct sk_buff *skb;
1909 int i;
1910 unsigned long flags;
1911
1912 XPRINTK("nicstar%d: drain_scq() called, scq at 0x%p, pos %d.\n",
1913 card->index, scq, pos);
1914 if (pos >= scq->num_entries) {
1915 printk("nicstar%d: Bad index on drain_scq().\n", card->index);
1916 return;
1917 }
1918
1919 spin_lock_irqsave(&scq->lock, flags);
1920 i = (int)(scq->tail - scq->base);
1921 if (++i == scq->num_entries)
1922 i = 0;
1923 while (i != pos) {
1924 skb = scq->skb[i];
1925 XPRINTK("nicstar%d: freeing skb at 0x%p (index %d).\n",
1926 card->index, skb, i);
1927 if (skb != NULL) {
1928 dma_unmap_single(&card->pcidev->dev,
1929 NS_PRV_DMA(skb),
1930 skb->len,
1931 DMA_TO_DEVICE);
1932 vcc = ATM_SKB(skb)->vcc;
1933 if (vcc && vcc->pop != NULL) {
1934 vcc->pop(vcc, skb);
1935 } else {
1936 dev_kfree_skb_irq(skb);
1937 }
1938 scq->skb[i] = NULL;
1939 }
1940 if (++i == scq->num_entries)
1941 i = 0;
1942 }
1943 scq->tail = scq->base + pos;
1944 spin_unlock_irqrestore(&scq->lock, flags);
1945}
1946
1947static void process_rsq(ns_dev * card)
1948{
1949 ns_rsqe *previous;
1950
1951 if (!ns_rsqe_valid(card->rsq.next))
1952 return;
1953 do {
1954 dequeue_rx(card, card->rsq.next);
1955 ns_rsqe_init(card->rsq.next);
1956 previous = card->rsq.next;
1957 if (card->rsq.next == card->rsq.last)
1958 card->rsq.next = card->rsq.base;
1959 else
1960 card->rsq.next++;
1961 } while (ns_rsqe_valid(card->rsq.next));
1962 writel(PTR_DIFF(previous, card->rsq.base), card->membase + RSQH);
1963}
1964
1965static void dequeue_rx(ns_dev * card, ns_rsqe * rsqe)
1966{
1967 u32 vpi, vci;
1968 vc_map *vc;
1969 struct sk_buff *iovb;
1970 struct iovec *iov;
1971 struct atm_vcc *vcc;
1972 struct sk_buff *skb;
1973 unsigned short aal5_len;
1974 int len;
1975 u32 stat;
1976 u32 id;
1977
1978 stat = readl(card->membase + STAT);
1979 card->sbfqc = ns_stat_sfbqc_get(stat);
1980 card->lbfqc = ns_stat_lfbqc_get(stat);
1981
1982 id = le32_to_cpu(rsqe->buffer_handle);
1983 skb = idr_find(&card->idr, id);
1984 if (!skb) {
1985 RXPRINTK(KERN_ERR
1986 "nicstar%d: idr_find() failed!\n", card->index);
1987 return;
1988 }
1989 idr_remove(&card->idr, id);
1990 dma_sync_single_for_cpu(&card->pcidev->dev,
1991 NS_PRV_DMA(skb),
1992 (NS_PRV_BUFTYPE(skb) == BUF_SM
1993 ? NS_SMSKBSIZE : NS_LGSKBSIZE),
1994 DMA_FROM_DEVICE);
1995 dma_unmap_single(&card->pcidev->dev,
1996 NS_PRV_DMA(skb),
1997 (NS_PRV_BUFTYPE(skb) == BUF_SM
1998 ? NS_SMSKBSIZE : NS_LGSKBSIZE),
1999 DMA_FROM_DEVICE);
2000 vpi = ns_rsqe_vpi(rsqe);
2001 vci = ns_rsqe_vci(rsqe);
2002 if (vpi >= 1UL << card->vpibits || vci >= 1UL << card->vcibits) {
2003 printk("nicstar%d: SDU received for out-of-range vc %d.%d.\n",
2004 card->index, vpi, vci);
2005 recycle_rx_buf(card, skb);
2006 return;
2007 }
2008
2009 vc = &(card->vcmap[vpi << card->vcibits | vci]);
2010 if (!vc->rx) {
2011 RXPRINTK("nicstar%d: SDU received on non-rx vc %d.%d.\n",
2012 card->index, vpi, vci);
2013 recycle_rx_buf(card, skb);
2014 return;
2015 }
2016
2017 vcc = vc->rx_vcc;
2018
2019 if (vcc->qos.aal == ATM_AAL0) {
2020 struct sk_buff *sb;
2021 unsigned char *cell;
2022 int i;
2023
2024 cell = skb->data;
2025 for (i = ns_rsqe_cellcount(rsqe); i; i--) {
2026 sb = dev_alloc_skb(NS_SMSKBSIZE);
2027 if (!sb) {
2028 printk
2029 ("nicstar%d: Can't allocate buffers for aal0.\n",
2030 card->index);
2031 atomic_add(i, &vcc->stats->rx_drop);
2032 break;
2033 }
2034 if (!atm_charge(vcc, sb->truesize)) {
2035 RXPRINTK
2036 ("nicstar%d: atm_charge() dropped aal0 packets.\n",
2037 card->index);
2038 atomic_add(i - 1, &vcc->stats->rx_drop); /* already increased by 1 */
2039 dev_kfree_skb_any(sb);
2040 break;
2041 }
2042 /* Rebuild the header */
2043 *((u32 *) sb->data) = le32_to_cpu(rsqe->word_1) << 4 |
2044 (ns_rsqe_clp(rsqe) ? 0x00000001 : 0x00000000);
2045 if (i == 1 && ns_rsqe_eopdu(rsqe))
2046 *((u32 *) sb->data) |= 0x00000002;
2047 skb_put(sb, NS_AAL0_HEADER);
2048 memcpy(skb_tail_pointer(sb), cell, ATM_CELL_PAYLOAD);
2049 skb_put(sb, ATM_CELL_PAYLOAD);
2050 ATM_SKB(sb)->vcc = vcc;
2051 __net_timestamp(sb);
2052 vcc->push(vcc, sb);
2053 atomic_inc(&vcc->stats->rx);
2054 cell += ATM_CELL_PAYLOAD;
2055 }
2056
2057 recycle_rx_buf(card, skb);
2058 return;
2059 }
2060
2061 /* To reach this point, the AAL layer can only be AAL5 */
2062
2063 if ((iovb = vc->rx_iov) == NULL) {
2064 iovb = skb_dequeue(&(card->iovpool.queue));
2065 if (iovb == NULL) { /* No buffers in the queue */
2066 iovb = alloc_skb(NS_IOVBUFSIZE, GFP_ATOMIC);
2067 if (iovb == NULL) {
2068 printk("nicstar%d: Out of iovec buffers.\n",
2069 card->index);
2070 atomic_inc(&vcc->stats->rx_drop);
2071 recycle_rx_buf(card, skb);
2072 return;
2073 }
2074 NS_PRV_BUFTYPE(iovb) = BUF_NONE;
2075 } else if (--card->iovpool.count < card->iovnr.min) {
2076 struct sk_buff *new_iovb;
2077 if ((new_iovb =
2078 alloc_skb(NS_IOVBUFSIZE, GFP_ATOMIC)) != NULL) {
2079 NS_PRV_BUFTYPE(iovb) = BUF_NONE;
2080 skb_queue_tail(&card->iovpool.queue, new_iovb);
2081 card->iovpool.count++;
2082 }
2083 }
2084 vc->rx_iov = iovb;
2085 NS_PRV_IOVCNT(iovb) = 0;
2086 iovb->len = 0;
2087 iovb->data = iovb->head;
2088 skb_reset_tail_pointer(iovb);
2089 /* IMPORTANT: a pointer to the sk_buff containing the small or large
2090 buffer is stored as iovec base, NOT a pointer to the
2091 small or large buffer itself. */
2092 } else if (NS_PRV_IOVCNT(iovb) >= NS_MAX_IOVECS) {
2093 printk("nicstar%d: received too big AAL5 SDU.\n", card->index);
2094 atomic_inc(&vcc->stats->rx_err);
2095 recycle_iovec_rx_bufs(card, (struct iovec *)iovb->data,
2096 NS_MAX_IOVECS);
2097 NS_PRV_IOVCNT(iovb) = 0;
2098 iovb->len = 0;
2099 iovb->data = iovb->head;
2100 skb_reset_tail_pointer(iovb);
2101 }
2102 iov = &((struct iovec *)iovb->data)[NS_PRV_IOVCNT(iovb)++];
2103 iov->iov_base = (void *)skb;
2104 iov->iov_len = ns_rsqe_cellcount(rsqe) * 48;
2105 iovb->len += iov->iov_len;
2106
2107#ifdef EXTRA_DEBUG
2108 if (NS_PRV_IOVCNT(iovb) == 1) {
2109 if (NS_PRV_BUFTYPE(skb) != BUF_SM) {
2110 printk
2111 ("nicstar%d: Expected a small buffer, and this is not one.\n",
2112 card->index);
2113 which_list(card, skb);
2114 atomic_inc(&vcc->stats->rx_err);
2115 recycle_rx_buf(card, skb);
2116 vc->rx_iov = NULL;
2117 recycle_iov_buf(card, iovb);
2118 return;
2119 }
2120 } else { /* NS_PRV_IOVCNT(iovb) >= 2 */
2121
2122 if (NS_PRV_BUFTYPE(skb) != BUF_LG) {
2123 printk
2124 ("nicstar%d: Expected a large buffer, and this is not one.\n",
2125 card->index);
2126 which_list(card, skb);
2127 atomic_inc(&vcc->stats->rx_err);
2128 recycle_iovec_rx_bufs(card, (struct iovec *)iovb->data,
2129 NS_PRV_IOVCNT(iovb));
2130 vc->rx_iov = NULL;
2131 recycle_iov_buf(card, iovb);
2132 return;
2133 }
2134 }
2135#endif /* EXTRA_DEBUG */
2136
2137 if (ns_rsqe_eopdu(rsqe)) {
2138 /* This works correctly regardless of the endianness of the host */
2139 unsigned char *L1L2 = (unsigned char *)
2140 (skb->data + iov->iov_len - 6);
2141 aal5_len = L1L2[0] << 8 | L1L2[1];
2142 len = (aal5_len == 0x0000) ? 0x10000 : aal5_len;
2143 if (ns_rsqe_crcerr(rsqe) ||
2144 len + 8 > iovb->len || len + (47 + 8) < iovb->len) {
2145 printk("nicstar%d: AAL5 CRC error", card->index);
2146 if (len + 8 > iovb->len || len + (47 + 8) < iovb->len)
2147 printk(" - PDU size mismatch.\n");
2148 else
2149 printk(".\n");
2150 atomic_inc(&vcc->stats->rx_err);
2151 recycle_iovec_rx_bufs(card, (struct iovec *)iovb->data,
2152 NS_PRV_IOVCNT(iovb));
2153 vc->rx_iov = NULL;
2154 recycle_iov_buf(card, iovb);
2155 return;
2156 }
2157
2158 /* By this point we (hopefully) have a complete SDU without errors. */
2159
2160 if (NS_PRV_IOVCNT(iovb) == 1) { /* Just a small buffer */
2161 /* skb points to a small buffer */
2162 if (!atm_charge(vcc, skb->truesize)) {
2163 push_rxbufs(card, skb);
2164 atomic_inc(&vcc->stats->rx_drop);
2165 } else {
2166 skb_put(skb, len);
2167 dequeue_sm_buf(card, skb);
2168 ATM_SKB(skb)->vcc = vcc;
2169 __net_timestamp(skb);
2170 vcc->push(vcc, skb);
2171 atomic_inc(&vcc->stats->rx);
2172 }
2173 } else if (NS_PRV_IOVCNT(iovb) == 2) { /* One small plus one large buffer */
2174 struct sk_buff *sb;
2175
2176 sb = (struct sk_buff *)(iov - 1)->iov_base;
2177 /* skb points to a large buffer */
2178
2179 if (len <= NS_SMBUFSIZE) {
2180 if (!atm_charge(vcc, sb->truesize)) {
2181 push_rxbufs(card, sb);
2182 atomic_inc(&vcc->stats->rx_drop);
2183 } else {
2184 skb_put(sb, len);
2185 dequeue_sm_buf(card, sb);
2186 ATM_SKB(sb)->vcc = vcc;
2187 __net_timestamp(sb);
2188 vcc->push(vcc, sb);
2189 atomic_inc(&vcc->stats->rx);
2190 }
2191
2192 push_rxbufs(card, skb);
2193
2194 } else { /* len > NS_SMBUFSIZE, the usual case */
2195
2196 if (!atm_charge(vcc, skb->truesize)) {
2197 push_rxbufs(card, skb);
2198 atomic_inc(&vcc->stats->rx_drop);
2199 } else {
2200 dequeue_lg_buf(card, skb);
2201 skb_push(skb, NS_SMBUFSIZE);
2202 skb_copy_from_linear_data(sb, skb->data,
2203 NS_SMBUFSIZE);
2204 skb_put(skb, len - NS_SMBUFSIZE);
2205 ATM_SKB(skb)->vcc = vcc;
2206 __net_timestamp(skb);
2207 vcc->push(vcc, skb);
2208 atomic_inc(&vcc->stats->rx);
2209 }
2210
2211 push_rxbufs(card, sb);
2212
2213 }
2214
2215 } else { /* Must push a huge buffer */
2216
2217 struct sk_buff *hb, *sb, *lb;
2218 int remaining, tocopy;
2219 int j;
2220
2221 hb = skb_dequeue(&(card->hbpool.queue));
2222 if (hb == NULL) { /* No buffers in the queue */
2223
2224 hb = dev_alloc_skb(NS_HBUFSIZE);
2225 if (hb == NULL) {
2226 printk
2227 ("nicstar%d: Out of huge buffers.\n",
2228 card->index);
2229 atomic_inc(&vcc->stats->rx_drop);
2230 recycle_iovec_rx_bufs(card,
2231 (struct iovec *)
2232 iovb->data,
2233 NS_PRV_IOVCNT(iovb));
2234 vc->rx_iov = NULL;
2235 recycle_iov_buf(card, iovb);
2236 return;
2237 } else if (card->hbpool.count < card->hbnr.min) {
2238 struct sk_buff *new_hb;
2239 if ((new_hb =
2240 dev_alloc_skb(NS_HBUFSIZE)) !=
2241 NULL) {
2242 skb_queue_tail(&card->hbpool.
2243 queue, new_hb);
2244 card->hbpool.count++;
2245 }
2246 }
2247 NS_PRV_BUFTYPE(hb) = BUF_NONE;
2248 } else if (--card->hbpool.count < card->hbnr.min) {
2249 struct sk_buff *new_hb;
2250 if ((new_hb =
2251 dev_alloc_skb(NS_HBUFSIZE)) != NULL) {
2252 NS_PRV_BUFTYPE(new_hb) = BUF_NONE;
2253 skb_queue_tail(&card->hbpool.queue,
2254 new_hb);
2255 card->hbpool.count++;
2256 }
2257 if (card->hbpool.count < card->hbnr.min) {
2258 if ((new_hb =
2259 dev_alloc_skb(NS_HBUFSIZE)) !=
2260 NULL) {
2261 NS_PRV_BUFTYPE(new_hb) =
2262 BUF_NONE;
2263 skb_queue_tail(&card->hbpool.
2264 queue, new_hb);
2265 card->hbpool.count++;
2266 }
2267 }
2268 }
2269
2270 iov = (struct iovec *)iovb->data;
2271
2272 if (!atm_charge(vcc, hb->truesize)) {
2273 recycle_iovec_rx_bufs(card, iov,
2274 NS_PRV_IOVCNT(iovb));
2275 if (card->hbpool.count < card->hbnr.max) {
2276 skb_queue_tail(&card->hbpool.queue, hb);
2277 card->hbpool.count++;
2278 } else
2279 dev_kfree_skb_any(hb);
2280 atomic_inc(&vcc->stats->rx_drop);
2281 } else {
2282 /* Copy the small buffer to the huge buffer */
2283 sb = (struct sk_buff *)iov->iov_base;
2284 skb_copy_from_linear_data(sb, hb->data,
2285 iov->iov_len);
2286 skb_put(hb, iov->iov_len);
2287 remaining = len - iov->iov_len;
2288 iov++;
2289 /* Free the small buffer */
2290 push_rxbufs(card, sb);
2291
2292 /* Copy all large buffers to the huge buffer and free them */
2293 for (j = 1; j < NS_PRV_IOVCNT(iovb); j++) {
2294 lb = (struct sk_buff *)iov->iov_base;
2295 tocopy =
2296 min_t(int, remaining, iov->iov_len);
2297 skb_copy_from_linear_data(lb,
2298 skb_tail_pointer
2299 (hb), tocopy);
2300 skb_put(hb, tocopy);
2301 iov++;
2302 remaining -= tocopy;
2303 push_rxbufs(card, lb);
2304 }
2305#ifdef EXTRA_DEBUG
2306 if (remaining != 0 || hb->len != len)
2307 printk
2308 ("nicstar%d: Huge buffer len mismatch.\n",
2309 card->index);
2310#endif /* EXTRA_DEBUG */
2311 ATM_SKB(hb)->vcc = vcc;
2312 __net_timestamp(hb);
2313 vcc->push(vcc, hb);
2314 atomic_inc(&vcc->stats->rx);
2315 }
2316 }
2317
2318 vc->rx_iov = NULL;
2319 recycle_iov_buf(card, iovb);
2320 }
2321
2322}
2323
2324static void recycle_rx_buf(ns_dev * card, struct sk_buff *skb)
2325{
2326 if (unlikely(NS_PRV_BUFTYPE(skb) == BUF_NONE)) {
2327 printk("nicstar%d: What kind of rx buffer is this?\n",
2328 card->index);
2329 dev_kfree_skb_any(skb);
2330 } else
2331 push_rxbufs(card, skb);
2332}
2333
2334static void recycle_iovec_rx_bufs(ns_dev * card, struct iovec *iov, int count)
2335{
2336 while (count-- > 0)
2337 recycle_rx_buf(card, (struct sk_buff *)(iov++)->iov_base);
2338}
2339
2340static void recycle_iov_buf(ns_dev * card, struct sk_buff *iovb)
2341{
2342 if (card->iovpool.count < card->iovnr.max) {
2343 skb_queue_tail(&card->iovpool.queue, iovb);
2344 card->iovpool.count++;
2345 } else
2346 dev_kfree_skb_any(iovb);
2347}
2348
2349static void dequeue_sm_buf(ns_dev * card, struct sk_buff *sb)
2350{
2351 skb_unlink(sb, &card->sbpool.queue);
2352 if (card->sbfqc < card->sbnr.init) {
2353 struct sk_buff *new_sb;
2354 if ((new_sb = dev_alloc_skb(NS_SMSKBSIZE)) != NULL) {
2355 NS_PRV_BUFTYPE(new_sb) = BUF_SM;
2356 skb_queue_tail(&card->sbpool.queue, new_sb);
2357 skb_reserve(new_sb, NS_AAL0_HEADER);
2358 push_rxbufs(card, new_sb);
2359 }
2360 }
2361 if (card->sbfqc < card->sbnr.init)
2362 {
2363 struct sk_buff *new_sb;
2364 if ((new_sb = dev_alloc_skb(NS_SMSKBSIZE)) != NULL) {
2365 NS_PRV_BUFTYPE(new_sb) = BUF_SM;
2366 skb_queue_tail(&card->sbpool.queue, new_sb);
2367 skb_reserve(new_sb, NS_AAL0_HEADER);
2368 push_rxbufs(card, new_sb);
2369 }
2370 }
2371}
2372
2373static void dequeue_lg_buf(ns_dev * card, struct sk_buff *lb)
2374{
2375 skb_unlink(lb, &card->lbpool.queue);
2376 if (card->lbfqc < card->lbnr.init) {
2377 struct sk_buff *new_lb;
2378 if ((new_lb = dev_alloc_skb(NS_LGSKBSIZE)) != NULL) {
2379 NS_PRV_BUFTYPE(new_lb) = BUF_LG;
2380 skb_queue_tail(&card->lbpool.queue, new_lb);
2381 skb_reserve(new_lb, NS_SMBUFSIZE);
2382 push_rxbufs(card, new_lb);
2383 }
2384 }
2385 if (card->lbfqc < card->lbnr.init)
2386 {
2387 struct sk_buff *new_lb;
2388 if ((new_lb = dev_alloc_skb(NS_LGSKBSIZE)) != NULL) {
2389 NS_PRV_BUFTYPE(new_lb) = BUF_LG;
2390 skb_queue_tail(&card->lbpool.queue, new_lb);
2391 skb_reserve(new_lb, NS_SMBUFSIZE);
2392 push_rxbufs(card, new_lb);
2393 }
2394 }
2395}
2396
2397static int ns_proc_read(struct atm_dev *dev, loff_t * pos, char *page)
2398{
2399 u32 stat;
2400 ns_dev *card;
2401 int left;
2402
2403 left = (int)*pos;
2404 card = (ns_dev *) dev->dev_data;
2405 stat = readl(card->membase + STAT);
2406 if (!left--)
2407 return sprintf(page, "Pool count min init max \n");
2408 if (!left--)
2409 return sprintf(page, "Small %5d %5d %5d %5d \n",
2410 ns_stat_sfbqc_get(stat), card->sbnr.min,
2411 card->sbnr.init, card->sbnr.max);
2412 if (!left--)
2413 return sprintf(page, "Large %5d %5d %5d %5d \n",
2414 ns_stat_lfbqc_get(stat), card->lbnr.min,
2415 card->lbnr.init, card->lbnr.max);
2416 if (!left--)
2417 return sprintf(page, "Huge %5d %5d %5d %5d \n",
2418 card->hbpool.count, card->hbnr.min,
2419 card->hbnr.init, card->hbnr.max);
2420 if (!left--)
2421 return sprintf(page, "Iovec %5d %5d %5d %5d \n",
2422 card->iovpool.count, card->iovnr.min,
2423 card->iovnr.init, card->iovnr.max);
2424 if (!left--) {
2425 int retval;
2426 retval =
2427 sprintf(page, "Interrupt counter: %u \n", card->intcnt);
2428 card->intcnt = 0;
2429 return retval;
2430 }
2431#if 0
2432 /* Dump 25.6 Mbps PHY registers */
2433 /* Now there's a 25.6 Mbps PHY driver this code isn't needed. I left it
2434 here just in case it's needed for debugging. */
2435 if (card->max_pcr == ATM_25_PCR && !left--) {
2436 u32 phy_regs[4];
2437 u32 i;
2438
2439 for (i = 0; i < 4; i++) {
2440 while (CMD_BUSY(card)) ;
2441 writel(NS_CMD_READ_UTILITY | 0x00000200 | i,
2442 card->membase + CMD);
2443 while (CMD_BUSY(card)) ;
2444 phy_regs[i] = readl(card->membase + DR0) & 0x000000FF;
2445 }
2446
2447 return sprintf(page, "PHY regs: 0x%02X 0x%02X 0x%02X 0x%02X \n",
2448 phy_regs[0], phy_regs[1], phy_regs[2],
2449 phy_regs[3]);
2450 }
2451#endif /* 0 - Dump 25.6 Mbps PHY registers */
2452#if 0
2453 /* Dump TST */
2454 if (left-- < NS_TST_NUM_ENTRIES) {
2455 if (card->tste2vc[left + 1] == NULL)
2456 return sprintf(page, "%5d - VBR/UBR \n", left + 1);
2457 else
2458 return sprintf(page, "%5d - %d %d \n", left + 1,
2459 card->tste2vc[left + 1]->tx_vcc->vpi,
2460 card->tste2vc[left + 1]->tx_vcc->vci);
2461 }
2462#endif /* 0 */
2463 return 0;
2464}
2465
2466static int ns_ioctl(struct atm_dev *dev, unsigned int cmd, void __user * arg)
2467{
2468 ns_dev *card;
2469 pool_levels pl;
2470 long btype;
2471 unsigned long flags;
2472
2473 card = dev->dev_data;
2474 switch (cmd) {
2475 case NS_GETPSTAT:
2476 if (get_user
2477 (pl.buftype, &((pool_levels __user *) arg)->buftype))
2478 return -EFAULT;
2479 switch (pl.buftype) {
2480 case NS_BUFTYPE_SMALL:
2481 pl.count =
2482 ns_stat_sfbqc_get(readl(card->membase + STAT));
2483 pl.level.min = card->sbnr.min;
2484 pl.level.init = card->sbnr.init;
2485 pl.level.max = card->sbnr.max;
2486 break;
2487
2488 case NS_BUFTYPE_LARGE:
2489 pl.count =
2490 ns_stat_lfbqc_get(readl(card->membase + STAT));
2491 pl.level.min = card->lbnr.min;
2492 pl.level.init = card->lbnr.init;
2493 pl.level.max = card->lbnr.max;
2494 break;
2495
2496 case NS_BUFTYPE_HUGE:
2497 pl.count = card->hbpool.count;
2498 pl.level.min = card->hbnr.min;
2499 pl.level.init = card->hbnr.init;
2500 pl.level.max = card->hbnr.max;
2501 break;
2502
2503 case NS_BUFTYPE_IOVEC:
2504 pl.count = card->iovpool.count;
2505 pl.level.min = card->iovnr.min;
2506 pl.level.init = card->iovnr.init;
2507 pl.level.max = card->iovnr.max;
2508 break;
2509
2510 default:
2511 return -ENOIOCTLCMD;
2512
2513 }
2514 if (!copy_to_user((pool_levels __user *) arg, &pl, sizeof(pl)))
2515 return (sizeof(pl));
2516 else
2517 return -EFAULT;
2518
2519 case NS_SETBUFLEV:
2520 if (!capable(CAP_NET_ADMIN))
2521 return -EPERM;
2522 if (copy_from_user(&pl, (pool_levels __user *) arg, sizeof(pl)))
2523 return -EFAULT;
2524 if (pl.level.min >= pl.level.init
2525 || pl.level.init >= pl.level.max)
2526 return -EINVAL;
2527 if (pl.level.min == 0)
2528 return -EINVAL;
2529 switch (pl.buftype) {
2530 case NS_BUFTYPE_SMALL:
2531 if (pl.level.max > TOP_SB)
2532 return -EINVAL;
2533 card->sbnr.min = pl.level.min;
2534 card->sbnr.init = pl.level.init;
2535 card->sbnr.max = pl.level.max;
2536 break;
2537
2538 case NS_BUFTYPE_LARGE:
2539 if (pl.level.max > TOP_LB)
2540 return -EINVAL;
2541 card->lbnr.min = pl.level.min;
2542 card->lbnr.init = pl.level.init;
2543 card->lbnr.max = pl.level.max;
2544 break;
2545
2546 case NS_BUFTYPE_HUGE:
2547 if (pl.level.max > TOP_HB)
2548 return -EINVAL;
2549 card->hbnr.min = pl.level.min;
2550 card->hbnr.init = pl.level.init;
2551 card->hbnr.max = pl.level.max;
2552 break;
2553
2554 case NS_BUFTYPE_IOVEC:
2555 if (pl.level.max > TOP_IOVB)
2556 return -EINVAL;
2557 card->iovnr.min = pl.level.min;
2558 card->iovnr.init = pl.level.init;
2559 card->iovnr.max = pl.level.max;
2560 break;
2561
2562 default:
2563 return -EINVAL;
2564
2565 }
2566 return 0;
2567
2568 case NS_ADJBUFLEV:
2569 if (!capable(CAP_NET_ADMIN))
2570 return -EPERM;
2571 btype = (long)arg; /* a long is the same size as a pointer or bigger */
2572 switch (btype) {
2573 case NS_BUFTYPE_SMALL:
2574 while (card->sbfqc < card->sbnr.init) {
2575 struct sk_buff *sb;
2576
2577 sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
2578 if (sb == NULL)
2579 return -ENOMEM;
2580 NS_PRV_BUFTYPE(sb) = BUF_SM;
2581 skb_queue_tail(&card->sbpool.queue, sb);
2582 skb_reserve(sb, NS_AAL0_HEADER);
2583 push_rxbufs(card, sb);
2584 }
2585 break;
2586
2587 case NS_BUFTYPE_LARGE:
2588 while (card->lbfqc < card->lbnr.init) {
2589 struct sk_buff *lb;
2590
2591 lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
2592 if (lb == NULL)
2593 return -ENOMEM;
2594 NS_PRV_BUFTYPE(lb) = BUF_LG;
2595 skb_queue_tail(&card->lbpool.queue, lb);
2596 skb_reserve(lb, NS_SMBUFSIZE);
2597 push_rxbufs(card, lb);
2598 }
2599 break;
2600
2601 case NS_BUFTYPE_HUGE:
2602 while (card->hbpool.count > card->hbnr.init) {
2603 struct sk_buff *hb;
2604
2605 spin_lock_irqsave(&card->int_lock, flags);
2606 hb = skb_dequeue(&card->hbpool.queue);
2607 card->hbpool.count--;
2608 spin_unlock_irqrestore(&card->int_lock, flags);
2609 if (hb == NULL)
2610 printk
2611 ("nicstar%d: huge buffer count inconsistent.\n",
2612 card->index);
2613 else
2614 dev_kfree_skb_any(hb);
2615
2616 }
2617 while (card->hbpool.count < card->hbnr.init) {
2618 struct sk_buff *hb;
2619
2620 hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
2621 if (hb == NULL)
2622 return -ENOMEM;
2623 NS_PRV_BUFTYPE(hb) = BUF_NONE;
2624 spin_lock_irqsave(&card->int_lock, flags);
2625 skb_queue_tail(&card->hbpool.queue, hb);
2626 card->hbpool.count++;
2627 spin_unlock_irqrestore(&card->int_lock, flags);
2628 }
2629 break;
2630
2631 case NS_BUFTYPE_IOVEC:
2632 while (card->iovpool.count > card->iovnr.init) {
2633 struct sk_buff *iovb;
2634
2635 spin_lock_irqsave(&card->int_lock, flags);
2636 iovb = skb_dequeue(&card->iovpool.queue);
2637 card->iovpool.count--;
2638 spin_unlock_irqrestore(&card->int_lock, flags);
2639 if (iovb == NULL)
2640 printk
2641 ("nicstar%d: iovec buffer count inconsistent.\n",
2642 card->index);
2643 else
2644 dev_kfree_skb_any(iovb);
2645
2646 }
2647 while (card->iovpool.count < card->iovnr.init) {
2648 struct sk_buff *iovb;
2649
2650 iovb = alloc_skb(NS_IOVBUFSIZE, GFP_KERNEL);
2651 if (iovb == NULL)
2652 return -ENOMEM;
2653 NS_PRV_BUFTYPE(iovb) = BUF_NONE;
2654 spin_lock_irqsave(&card->int_lock, flags);
2655 skb_queue_tail(&card->iovpool.queue, iovb);
2656 card->iovpool.count++;
2657 spin_unlock_irqrestore(&card->int_lock, flags);
2658 }
2659 break;
2660
2661 default:
2662 return -EINVAL;
2663
2664 }
2665 return 0;
2666
2667 default:
2668 if (dev->phy && dev->phy->ioctl) {
2669 return dev->phy->ioctl(dev, cmd, arg);
2670 } else {
2671 printk("nicstar%d: %s == NULL \n", card->index,
2672 dev->phy ? "dev->phy->ioctl" : "dev->phy");
2673 return -ENOIOCTLCMD;
2674 }
2675 }
2676}
2677
2678#ifdef EXTRA_DEBUG
2679static void which_list(ns_dev * card, struct sk_buff *skb)
2680{
2681 printk("skb buf_type: 0x%08x\n", NS_PRV_BUFTYPE(skb));
2682}
2683#endif /* EXTRA_DEBUG */
2684
2685static void ns_poll(unsigned long arg)
2686{
2687 int i;
2688 ns_dev *card;
2689 unsigned long flags;
2690 u32 stat_r, stat_w;
2691
2692 PRINTK("nicstar: Entering ns_poll().\n");
2693 for (i = 0; i < num_cards; i++) {
2694 card = cards[i];
2695 if (spin_is_locked(&card->int_lock)) {
2696 /* Probably it isn't worth spinning */
2697 continue;
2698 }
2699 spin_lock_irqsave(&card->int_lock, flags);
2700
2701 stat_w = 0;
2702 stat_r = readl(card->membase + STAT);
2703 if (stat_r & NS_STAT_TSIF)
2704 stat_w |= NS_STAT_TSIF;
2705 if (stat_r & NS_STAT_EOPDU)
2706 stat_w |= NS_STAT_EOPDU;
2707
2708 process_tsq(card);
2709 process_rsq(card);
2710
2711 writel(stat_w, card->membase + STAT);
2712 spin_unlock_irqrestore(&card->int_lock, flags);
2713 }
2714 mod_timer(&ns_timer, jiffies + NS_POLL_PERIOD);
2715 PRINTK("nicstar: Leaving ns_poll().\n");
2716}
2717
2718static void ns_phy_put(struct atm_dev *dev, unsigned char value,
2719 unsigned long addr)
2720{
2721 ns_dev *card;
2722 unsigned long flags;
2723
2724 card = dev->dev_data;
2725 spin_lock_irqsave(&card->res_lock, flags);
2726 while (CMD_BUSY(card)) ;
2727 writel((u32) value, card->membase + DR0);
2728 writel(NS_CMD_WRITE_UTILITY | 0x00000200 | (addr & 0x000000FF),
2729 card->membase + CMD);
2730 spin_unlock_irqrestore(&card->res_lock, flags);
2731}
2732
2733static unsigned char ns_phy_get(struct atm_dev *dev, unsigned long addr)
2734{
2735 ns_dev *card;
2736 unsigned long flags;
2737 u32 data;
2738
2739 card = dev->dev_data;
2740 spin_lock_irqsave(&card->res_lock, flags);
2741 while (CMD_BUSY(card)) ;
2742 writel(NS_CMD_READ_UTILITY | 0x00000200 | (addr & 0x000000FF),
2743 card->membase + CMD);
2744 while (CMD_BUSY(card)) ;
2745 data = readl(card->membase + DR0) & 0x000000FF;
2746 spin_unlock_irqrestore(&card->res_lock, flags);
2747 return (unsigned char)data;
2748}
2749
2750module_init(nicstar_init);
2751module_exit(nicstar_cleanup);