atm/nicstar: don't use idr_remove_all()
[~shefty/rdma-dev.git] / drivers / atm / nicstar.c
1 /*
2  * nicstar.c
3  *
4  * Device driver supporting CBR for IDT 77201/77211 "NICStAR" based cards.
5  *
6  * IMPORTANT: The included file nicstarmac.c was NOT WRITTEN BY ME.
7  *            It was taken from the frle-0.22 device driver.
8  *            As the file doesn't have a copyright notice, in the file
9  *            nicstarmac.copyright I put the copyright notice from the
10  *            frle-0.22 device driver.
11  *            Some code is based on the nicstar driver by M. Welsh.
12  *
13  * Author: Rui Prior (rprior@inescn.pt)
14  * PowerPC support by Jay Talbott (jay_talbott@mcg.mot.com) April 1999
15  *
16  *
17  * (C) INESC 1999
18  */
19
20 /*
21  * IMPORTANT INFORMATION
22  *
23  * There are currently three types of spinlocks:
24  *
25  * 1 - Per card interrupt spinlock (to protect structures and such)
26  * 2 - Per SCQ scq spinlock
27  * 3 - Per card resource spinlock (to access registers, etc.)
28  *
29  * These must NEVER be grabbed in reverse order.
30  *
31  */
32
33 /* Header files */
34
35 #include <linux/module.h>
36 #include <linux/kernel.h>
37 #include <linux/skbuff.h>
38 #include <linux/atmdev.h>
39 #include <linux/atm.h>
40 #include <linux/pci.h>
41 #include <linux/dma-mapping.h>
42 #include <linux/types.h>
43 #include <linux/string.h>
44 #include <linux/delay.h>
45 #include <linux/init.h>
46 #include <linux/sched.h>
47 #include <linux/timer.h>
48 #include <linux/interrupt.h>
49 #include <linux/bitops.h>
50 #include <linux/slab.h>
51 #include <linux/idr.h>
52 #include <asm/io.h>
53 #include <asm/uaccess.h>
54 #include <linux/atomic.h>
55 #include "nicstar.h"
56 #ifdef CONFIG_ATM_NICSTAR_USE_SUNI
57 #include "suni.h"
58 #endif /* CONFIG_ATM_NICSTAR_USE_SUNI */
59 #ifdef CONFIG_ATM_NICSTAR_USE_IDT77105
60 #include "idt77105.h"
61 #endif /* CONFIG_ATM_NICSTAR_USE_IDT77105 */
62
63 /* Additional code */
64
65 #include "nicstarmac.c"
66
67 /* Configurable parameters */
68
69 #undef PHY_LOOPBACK
70 #undef TX_DEBUG
71 #undef RX_DEBUG
72 #undef GENERAL_DEBUG
73 #undef EXTRA_DEBUG
74
75 #undef NS_USE_DESTRUCTORS       /* For now keep this undefined unless you know
76                                    you're going to use only raw ATM */
77
78 /* Do not touch these */
79
80 #ifdef TX_DEBUG
81 #define TXPRINTK(args...) printk(args)
82 #else
83 #define TXPRINTK(args...)
84 #endif /* TX_DEBUG */
85
86 #ifdef RX_DEBUG
87 #define RXPRINTK(args...) printk(args)
88 #else
89 #define RXPRINTK(args...)
90 #endif /* RX_DEBUG */
91
92 #ifdef GENERAL_DEBUG
93 #define PRINTK(args...) printk(args)
94 #else
95 #define PRINTK(args...)
96 #endif /* GENERAL_DEBUG */
97
98 #ifdef EXTRA_DEBUG
99 #define XPRINTK(args...) printk(args)
100 #else
101 #define XPRINTK(args...)
102 #endif /* EXTRA_DEBUG */
103
104 /* Macros */
105
106 #define CMD_BUSY(card) (readl((card)->membase + STAT) & NS_STAT_CMDBZ)
107
108 #define NS_DELAY mdelay(1)
109
110 #define PTR_DIFF(a, b)  ((u32)((unsigned long)(a) - (unsigned long)(b)))
111
112 #ifndef ATM_SKB
113 #define ATM_SKB(s) (&(s)->atm)
114 #endif
115
116 #define scq_virt_to_bus(scq, p) \
117                 (scq->dma + ((unsigned long)(p) - (unsigned long)(scq)->org))
118
119 /* Function declarations */
120
121 static u32 ns_read_sram(ns_dev * card, u32 sram_address);
122 static void ns_write_sram(ns_dev * card, u32 sram_address, u32 * value,
123                           int count);
124 static int ns_init_card(int i, struct pci_dev *pcidev);
125 static void ns_init_card_error(ns_dev * card, int error);
126 static scq_info *get_scq(ns_dev *card, int size, u32 scd);
127 static void free_scq(ns_dev *card, scq_info * scq, struct atm_vcc *vcc);
128 static void push_rxbufs(ns_dev *, struct sk_buff *);
129 static irqreturn_t ns_irq_handler(int irq, void *dev_id);
130 static int ns_open(struct atm_vcc *vcc);
131 static void ns_close(struct atm_vcc *vcc);
132 static void fill_tst(ns_dev * card, int n, vc_map * vc);
133 static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb);
134 static int push_scqe(ns_dev * card, vc_map * vc, scq_info * scq, ns_scqe * tbd,
135                      struct sk_buff *skb);
136 static void process_tsq(ns_dev * card);
137 static void drain_scq(ns_dev * card, scq_info * scq, int pos);
138 static void process_rsq(ns_dev * card);
139 static void dequeue_rx(ns_dev * card, ns_rsqe * rsqe);
140 #ifdef NS_USE_DESTRUCTORS
141 static void ns_sb_destructor(struct sk_buff *sb);
142 static void ns_lb_destructor(struct sk_buff *lb);
143 static void ns_hb_destructor(struct sk_buff *hb);
144 #endif /* NS_USE_DESTRUCTORS */
145 static void recycle_rx_buf(ns_dev * card, struct sk_buff *skb);
146 static void recycle_iovec_rx_bufs(ns_dev * card, struct iovec *iov, int count);
147 static void recycle_iov_buf(ns_dev * card, struct sk_buff *iovb);
148 static void dequeue_sm_buf(ns_dev * card, struct sk_buff *sb);
149 static void dequeue_lg_buf(ns_dev * card, struct sk_buff *lb);
150 static int ns_proc_read(struct atm_dev *dev, loff_t * pos, char *page);
151 static int ns_ioctl(struct atm_dev *dev, unsigned int cmd, void __user * arg);
152 #ifdef EXTRA_DEBUG
153 static void which_list(ns_dev * card, struct sk_buff *skb);
154 #endif
155 static void ns_poll(unsigned long arg);
156 static int ns_parse_mac(char *mac, unsigned char *esi);
157 static void ns_phy_put(struct atm_dev *dev, unsigned char value,
158                        unsigned long addr);
159 static unsigned char ns_phy_get(struct atm_dev *dev, unsigned long addr);
160
161 /* Global variables */
162
163 static struct ns_dev *cards[NS_MAX_CARDS];
164 static unsigned num_cards;
165 static struct atmdev_ops atm_ops = {
166         .open = ns_open,
167         .close = ns_close,
168         .ioctl = ns_ioctl,
169         .send = ns_send,
170         .phy_put = ns_phy_put,
171         .phy_get = ns_phy_get,
172         .proc_read = ns_proc_read,
173         .owner = THIS_MODULE,
174 };
175
176 static struct timer_list ns_timer;
177 static char *mac[NS_MAX_CARDS];
178 module_param_array(mac, charp, NULL, 0);
179 MODULE_LICENSE("GPL");
180
181 /* Functions */
182
183 static int nicstar_init_one(struct pci_dev *pcidev,
184                             const struct pci_device_id *ent)
185 {
186         static int index = -1;
187         unsigned int error;
188
189         index++;
190         cards[index] = NULL;
191
192         error = ns_init_card(index, pcidev);
193         if (error) {
194                 cards[index--] = NULL;  /* don't increment index */
195                 goto err_out;
196         }
197
198         return 0;
199 err_out:
200         return -ENODEV;
201 }
202
203 static void nicstar_remove_one(struct pci_dev *pcidev)
204 {
205         int i, j;
206         ns_dev *card = pci_get_drvdata(pcidev);
207         struct sk_buff *hb;
208         struct sk_buff *iovb;
209         struct sk_buff *lb;
210         struct sk_buff *sb;
211
212         i = card->index;
213
214         if (cards[i] == NULL)
215                 return;
216
217         if (card->atmdev->phy && card->atmdev->phy->stop)
218                 card->atmdev->phy->stop(card->atmdev);
219
220         /* Stop everything */
221         writel(0x00000000, card->membase + CFG);
222
223         /* De-register device */
224         atm_dev_deregister(card->atmdev);
225
226         /* Disable PCI device */
227         pci_disable_device(pcidev);
228
229         /* Free up resources */
230         j = 0;
231         PRINTK("nicstar%d: freeing %d huge buffers.\n", i, card->hbpool.count);
232         while ((hb = skb_dequeue(&card->hbpool.queue)) != NULL) {
233                 dev_kfree_skb_any(hb);
234                 j++;
235         }
236         PRINTK("nicstar%d: %d huge buffers freed.\n", i, j);
237         j = 0;
238         PRINTK("nicstar%d: freeing %d iovec buffers.\n", i,
239                card->iovpool.count);
240         while ((iovb = skb_dequeue(&card->iovpool.queue)) != NULL) {
241                 dev_kfree_skb_any(iovb);
242                 j++;
243         }
244         PRINTK("nicstar%d: %d iovec buffers freed.\n", i, j);
245         while ((lb = skb_dequeue(&card->lbpool.queue)) != NULL)
246                 dev_kfree_skb_any(lb);
247         while ((sb = skb_dequeue(&card->sbpool.queue)) != NULL)
248                 dev_kfree_skb_any(sb);
249         free_scq(card, card->scq0, NULL);
250         for (j = 0; j < NS_FRSCD_NUM; j++) {
251                 if (card->scd2vc[j] != NULL)
252                         free_scq(card, card->scd2vc[j]->scq, card->scd2vc[j]->tx_vcc);
253         }
254         idr_destroy(&card->idr);
255         pci_free_consistent(card->pcidev, NS_RSQSIZE + NS_RSQ_ALIGNMENT,
256                             card->rsq.org, card->rsq.dma);
257         pci_free_consistent(card->pcidev, NS_TSQSIZE + NS_TSQ_ALIGNMENT,
258                             card->tsq.org, card->tsq.dma);
259         free_irq(card->pcidev->irq, card);
260         iounmap(card->membase);
261         kfree(card);
262 }
263
264 static struct pci_device_id nicstar_pci_tbl[] = {
265         { PCI_VDEVICE(IDT, PCI_DEVICE_ID_IDT_IDT77201), 0 },
266         {0,}                    /* terminate list */
267 };
268
269 MODULE_DEVICE_TABLE(pci, nicstar_pci_tbl);
270
271 static struct pci_driver nicstar_driver = {
272         .name = "nicstar",
273         .id_table = nicstar_pci_tbl,
274         .probe = nicstar_init_one,
275         .remove = nicstar_remove_one,
276 };
277
278 static int __init nicstar_init(void)
279 {
280         unsigned error = 0;     /* Initialized to remove compile warning */
281
282         XPRINTK("nicstar: nicstar_init() called.\n");
283
284         error = pci_register_driver(&nicstar_driver);
285
286         TXPRINTK("nicstar: TX debug enabled.\n");
287         RXPRINTK("nicstar: RX debug enabled.\n");
288         PRINTK("nicstar: General debug enabled.\n");
289 #ifdef PHY_LOOPBACK
290         printk("nicstar: using PHY loopback.\n");
291 #endif /* PHY_LOOPBACK */
292         XPRINTK("nicstar: nicstar_init() returned.\n");
293
294         if (!error) {
295                 init_timer(&ns_timer);
296                 ns_timer.expires = jiffies + NS_POLL_PERIOD;
297                 ns_timer.data = 0UL;
298                 ns_timer.function = ns_poll;
299                 add_timer(&ns_timer);
300         }
301
302         return error;
303 }
304
305 static void __exit nicstar_cleanup(void)
306 {
307         XPRINTK("nicstar: nicstar_cleanup() called.\n");
308
309         del_timer(&ns_timer);
310
311         pci_unregister_driver(&nicstar_driver);
312
313         XPRINTK("nicstar: nicstar_cleanup() returned.\n");
314 }
315
316 static u32 ns_read_sram(ns_dev * card, u32 sram_address)
317 {
318         unsigned long flags;
319         u32 data;
320         sram_address <<= 2;
321         sram_address &= 0x0007FFFC;     /* address must be dword aligned */
322         sram_address |= 0x50000000;     /* SRAM read command */
323         spin_lock_irqsave(&card->res_lock, flags);
324         while (CMD_BUSY(card)) ;
325         writel(sram_address, card->membase + CMD);
326         while (CMD_BUSY(card)) ;
327         data = readl(card->membase + DR0);
328         spin_unlock_irqrestore(&card->res_lock, flags);
329         return data;
330 }
331
332 static void ns_write_sram(ns_dev * card, u32 sram_address, u32 * value,
333                           int count)
334 {
335         unsigned long flags;
336         int i, c;
337         count--;                /* count range now is 0..3 instead of 1..4 */
338         c = count;
339         c <<= 2;                /* to use increments of 4 */
340         spin_lock_irqsave(&card->res_lock, flags);
341         while (CMD_BUSY(card)) ;
342         for (i = 0; i <= c; i += 4)
343                 writel(*(value++), card->membase + i);
344         /* Note: DR# registers are the first 4 dwords in nicstar's memspace,
345            so card->membase + DR0 == card->membase */
346         sram_address <<= 2;
347         sram_address &= 0x0007FFFC;
348         sram_address |= (0x40000000 | count);
349         writel(sram_address, card->membase + CMD);
350         spin_unlock_irqrestore(&card->res_lock, flags);
351 }
352
353 static int ns_init_card(int i, struct pci_dev *pcidev)
354 {
355         int j;
356         struct ns_dev *card = NULL;
357         unsigned char pci_latency;
358         unsigned error;
359         u32 data;
360         u32 u32d[4];
361         u32 ns_cfg_rctsize;
362         int bcount;
363         unsigned long membase;
364
365         error = 0;
366
367         if (pci_enable_device(pcidev)) {
368                 printk("nicstar%d: can't enable PCI device\n", i);
369                 error = 2;
370                 ns_init_card_error(card, error);
371                 return error;
372         }
373         if ((pci_set_dma_mask(pcidev, DMA_BIT_MASK(32)) != 0) ||
374             (pci_set_consistent_dma_mask(pcidev, DMA_BIT_MASK(32)) != 0)) {
375                 printk(KERN_WARNING
376                        "nicstar%d: No suitable DMA available.\n", i);
377                 error = 2;
378                 ns_init_card_error(card, error);
379                 return error;
380         }
381
382         if ((card = kmalloc(sizeof(ns_dev), GFP_KERNEL)) == NULL) {
383                 printk
384                     ("nicstar%d: can't allocate memory for device structure.\n",
385                      i);
386                 error = 2;
387                 ns_init_card_error(card, error);
388                 return error;
389         }
390         cards[i] = card;
391         spin_lock_init(&card->int_lock);
392         spin_lock_init(&card->res_lock);
393
394         pci_set_drvdata(pcidev, card);
395
396         card->index = i;
397         card->atmdev = NULL;
398         card->pcidev = pcidev;
399         membase = pci_resource_start(pcidev, 1);
400         card->membase = ioremap(membase, NS_IOREMAP_SIZE);
401         if (!card->membase) {
402                 printk("nicstar%d: can't ioremap() membase.\n", i);
403                 error = 3;
404                 ns_init_card_error(card, error);
405                 return error;
406         }
407         PRINTK("nicstar%d: membase at 0x%p.\n", i, card->membase);
408
409         pci_set_master(pcidev);
410
411         if (pci_read_config_byte(pcidev, PCI_LATENCY_TIMER, &pci_latency) != 0) {
412                 printk("nicstar%d: can't read PCI latency timer.\n", i);
413                 error = 6;
414                 ns_init_card_error(card, error);
415                 return error;
416         }
417 #ifdef NS_PCI_LATENCY
418         if (pci_latency < NS_PCI_LATENCY) {
419                 PRINTK("nicstar%d: setting PCI latency timer to %d.\n", i,
420                        NS_PCI_LATENCY);
421                 for (j = 1; j < 4; j++) {
422                         if (pci_write_config_byte
423                             (pcidev, PCI_LATENCY_TIMER, NS_PCI_LATENCY) != 0)
424                                 break;
425                 }
426                 if (j == 4) {
427                         printk
428                             ("nicstar%d: can't set PCI latency timer to %d.\n",
429                              i, NS_PCI_LATENCY);
430                         error = 7;
431                         ns_init_card_error(card, error);
432                         return error;
433                 }
434         }
435 #endif /* NS_PCI_LATENCY */
436
437         /* Clear timer overflow */
438         data = readl(card->membase + STAT);
439         if (data & NS_STAT_TMROF)
440                 writel(NS_STAT_TMROF, card->membase + STAT);
441
442         /* Software reset */
443         writel(NS_CFG_SWRST, card->membase + CFG);
444         NS_DELAY;
445         writel(0x00000000, card->membase + CFG);
446
447         /* PHY reset */
448         writel(0x00000008, card->membase + GP);
449         NS_DELAY;
450         writel(0x00000001, card->membase + GP);
451         NS_DELAY;
452         while (CMD_BUSY(card)) ;
453         writel(NS_CMD_WRITE_UTILITY | 0x00000100, card->membase + CMD); /* Sync UTOPIA with SAR clock */
454         NS_DELAY;
455
456         /* Detect PHY type */
457         while (CMD_BUSY(card)) ;
458         writel(NS_CMD_READ_UTILITY | 0x00000200, card->membase + CMD);
459         while (CMD_BUSY(card)) ;
460         data = readl(card->membase + DR0);
461         switch (data) {
462         case 0x00000009:
463                 printk("nicstar%d: PHY seems to be 25 Mbps.\n", i);
464                 card->max_pcr = ATM_25_PCR;
465                 while (CMD_BUSY(card)) ;
466                 writel(0x00000008, card->membase + DR0);
467                 writel(NS_CMD_WRITE_UTILITY | 0x00000200, card->membase + CMD);
468                 /* Clear an eventual pending interrupt */
469                 writel(NS_STAT_SFBQF, card->membase + STAT);
470 #ifdef PHY_LOOPBACK
471                 while (CMD_BUSY(card)) ;
472                 writel(0x00000022, card->membase + DR0);
473                 writel(NS_CMD_WRITE_UTILITY | 0x00000202, card->membase + CMD);
474 #endif /* PHY_LOOPBACK */
475                 break;
476         case 0x00000030:
477         case 0x00000031:
478                 printk("nicstar%d: PHY seems to be 155 Mbps.\n", i);
479                 card->max_pcr = ATM_OC3_PCR;
480 #ifdef PHY_LOOPBACK
481                 while (CMD_BUSY(card)) ;
482                 writel(0x00000002, card->membase + DR0);
483                 writel(NS_CMD_WRITE_UTILITY | 0x00000205, card->membase + CMD);
484 #endif /* PHY_LOOPBACK */
485                 break;
486         default:
487                 printk("nicstar%d: unknown PHY type (0x%08X).\n", i, data);
488                 error = 8;
489                 ns_init_card_error(card, error);
490                 return error;
491         }
492         writel(0x00000000, card->membase + GP);
493
494         /* Determine SRAM size */
495         data = 0x76543210;
496         ns_write_sram(card, 0x1C003, &data, 1);
497         data = 0x89ABCDEF;
498         ns_write_sram(card, 0x14003, &data, 1);
499         if (ns_read_sram(card, 0x14003) == 0x89ABCDEF &&
500             ns_read_sram(card, 0x1C003) == 0x76543210)
501                 card->sram_size = 128;
502         else
503                 card->sram_size = 32;
504         PRINTK("nicstar%d: %dK x 32bit SRAM size.\n", i, card->sram_size);
505
506         card->rct_size = NS_MAX_RCTSIZE;
507
508 #if (NS_MAX_RCTSIZE == 4096)
509         if (card->sram_size == 128)
510                 printk
511                     ("nicstar%d: limiting maximum VCI. See NS_MAX_RCTSIZE in nicstar.h\n",
512                      i);
513 #elif (NS_MAX_RCTSIZE == 16384)
514         if (card->sram_size == 32) {
515                 printk
516                     ("nicstar%d: wasting memory. See NS_MAX_RCTSIZE in nicstar.h\n",
517                      i);
518                 card->rct_size = 4096;
519         }
520 #else
521 #error NS_MAX_RCTSIZE must be either 4096 or 16384 in nicstar.c
522 #endif
523
524         card->vpibits = NS_VPIBITS;
525         if (card->rct_size == 4096)
526                 card->vcibits = 12 - NS_VPIBITS;
527         else                    /* card->rct_size == 16384 */
528                 card->vcibits = 14 - NS_VPIBITS;
529
530         /* Initialize the nicstar eeprom/eprom stuff, for the MAC addr */
531         if (mac[i] == NULL)
532                 nicstar_init_eprom(card->membase);
533
534         /* Set the VPI/VCI MSb mask to zero so we can receive OAM cells */
535         writel(0x00000000, card->membase + VPM);
536
537         /* Initialize TSQ */
538         card->tsq.org = pci_alloc_consistent(card->pcidev,
539                                              NS_TSQSIZE + NS_TSQ_ALIGNMENT,
540                                              &card->tsq.dma);
541         if (card->tsq.org == NULL) {
542                 printk("nicstar%d: can't allocate TSQ.\n", i);
543                 error = 10;
544                 ns_init_card_error(card, error);
545                 return error;
546         }
547         card->tsq.base = PTR_ALIGN(card->tsq.org, NS_TSQ_ALIGNMENT);
548         card->tsq.next = card->tsq.base;
549         card->tsq.last = card->tsq.base + (NS_TSQ_NUM_ENTRIES - 1);
550         for (j = 0; j < NS_TSQ_NUM_ENTRIES; j++)
551                 ns_tsi_init(card->tsq.base + j);
552         writel(0x00000000, card->membase + TSQH);
553         writel(ALIGN(card->tsq.dma, NS_TSQ_ALIGNMENT), card->membase + TSQB);
554         PRINTK("nicstar%d: TSQ base at 0x%p.\n", i, card->tsq.base);
555
556         /* Initialize RSQ */
557         card->rsq.org = pci_alloc_consistent(card->pcidev,
558                                              NS_RSQSIZE + NS_RSQ_ALIGNMENT,
559                                              &card->rsq.dma);
560         if (card->rsq.org == NULL) {
561                 printk("nicstar%d: can't allocate RSQ.\n", i);
562                 error = 11;
563                 ns_init_card_error(card, error);
564                 return error;
565         }
566         card->rsq.base = PTR_ALIGN(card->rsq.org, NS_RSQ_ALIGNMENT);
567         card->rsq.next = card->rsq.base;
568         card->rsq.last = card->rsq.base + (NS_RSQ_NUM_ENTRIES - 1);
569         for (j = 0; j < NS_RSQ_NUM_ENTRIES; j++)
570                 ns_rsqe_init(card->rsq.base + j);
571         writel(0x00000000, card->membase + RSQH);
572         writel(ALIGN(card->rsq.dma, NS_RSQ_ALIGNMENT), card->membase + RSQB);
573         PRINTK("nicstar%d: RSQ base at 0x%p.\n", i, card->rsq.base);
574
575         /* Initialize SCQ0, the only VBR SCQ used */
576         card->scq1 = NULL;
577         card->scq2 = NULL;
578         card->scq0 = get_scq(card, VBR_SCQSIZE, NS_VRSCD0);
579         if (card->scq0 == NULL) {
580                 printk("nicstar%d: can't get SCQ0.\n", i);
581                 error = 12;
582                 ns_init_card_error(card, error);
583                 return error;
584         }
585         u32d[0] = scq_virt_to_bus(card->scq0, card->scq0->base);
586         u32d[1] = (u32) 0x00000000;
587         u32d[2] = (u32) 0xffffffff;
588         u32d[3] = (u32) 0x00000000;
589         ns_write_sram(card, NS_VRSCD0, u32d, 4);
590         ns_write_sram(card, NS_VRSCD1, u32d, 4);        /* These last two won't be used */
591         ns_write_sram(card, NS_VRSCD2, u32d, 4);        /* but are initialized, just in case... */
592         card->scq0->scd = NS_VRSCD0;
593         PRINTK("nicstar%d: VBR-SCQ0 base at 0x%p.\n", i, card->scq0->base);
594
595         /* Initialize TSTs */
596         card->tst_addr = NS_TST0;
597         card->tst_free_entries = NS_TST_NUM_ENTRIES;
598         data = NS_TST_OPCODE_VARIABLE;
599         for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
600                 ns_write_sram(card, NS_TST0 + j, &data, 1);
601         data = ns_tste_make(NS_TST_OPCODE_END, NS_TST0);
602         ns_write_sram(card, NS_TST0 + NS_TST_NUM_ENTRIES, &data, 1);
603         for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
604                 ns_write_sram(card, NS_TST1 + j, &data, 1);
605         data = ns_tste_make(NS_TST_OPCODE_END, NS_TST1);
606         ns_write_sram(card, NS_TST1 + NS_TST_NUM_ENTRIES, &data, 1);
607         for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
608                 card->tste2vc[j] = NULL;
609         writel(NS_TST0 << 2, card->membase + TSTB);
610
611         /* Initialize RCT. AAL type is set on opening the VC. */
612 #ifdef RCQ_SUPPORT
613         u32d[0] = NS_RCTE_RAWCELLINTEN;
614 #else
615         u32d[0] = 0x00000000;
616 #endif /* RCQ_SUPPORT */
617         u32d[1] = 0x00000000;
618         u32d[2] = 0x00000000;
619         u32d[3] = 0xFFFFFFFF;
620         for (j = 0; j < card->rct_size; j++)
621                 ns_write_sram(card, j * 4, u32d, 4);
622
623         memset(card->vcmap, 0, NS_MAX_RCTSIZE * sizeof(vc_map));
624
625         for (j = 0; j < NS_FRSCD_NUM; j++)
626                 card->scd2vc[j] = NULL;
627
628         /* Initialize buffer levels */
629         card->sbnr.min = MIN_SB;
630         card->sbnr.init = NUM_SB;
631         card->sbnr.max = MAX_SB;
632         card->lbnr.min = MIN_LB;
633         card->lbnr.init = NUM_LB;
634         card->lbnr.max = MAX_LB;
635         card->iovnr.min = MIN_IOVB;
636         card->iovnr.init = NUM_IOVB;
637         card->iovnr.max = MAX_IOVB;
638         card->hbnr.min = MIN_HB;
639         card->hbnr.init = NUM_HB;
640         card->hbnr.max = MAX_HB;
641
642         card->sm_handle = 0x00000000;
643         card->sm_addr = 0x00000000;
644         card->lg_handle = 0x00000000;
645         card->lg_addr = 0x00000000;
646
647         card->efbie = 1;        /* To prevent push_rxbufs from enabling the interrupt */
648
649         idr_init(&card->idr);
650
651         /* Pre-allocate some huge buffers */
652         skb_queue_head_init(&card->hbpool.queue);
653         card->hbpool.count = 0;
654         for (j = 0; j < NUM_HB; j++) {
655                 struct sk_buff *hb;
656                 hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
657                 if (hb == NULL) {
658                         printk
659                             ("nicstar%d: can't allocate %dth of %d huge buffers.\n",
660                              i, j, NUM_HB);
661                         error = 13;
662                         ns_init_card_error(card, error);
663                         return error;
664                 }
665                 NS_PRV_BUFTYPE(hb) = BUF_NONE;
666                 skb_queue_tail(&card->hbpool.queue, hb);
667                 card->hbpool.count++;
668         }
669
670         /* Allocate large buffers */
671         skb_queue_head_init(&card->lbpool.queue);
672         card->lbpool.count = 0; /* Not used */
673         for (j = 0; j < NUM_LB; j++) {
674                 struct sk_buff *lb;
675                 lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
676                 if (lb == NULL) {
677                         printk
678                             ("nicstar%d: can't allocate %dth of %d large buffers.\n",
679                              i, j, NUM_LB);
680                         error = 14;
681                         ns_init_card_error(card, error);
682                         return error;
683                 }
684                 NS_PRV_BUFTYPE(lb) = BUF_LG;
685                 skb_queue_tail(&card->lbpool.queue, lb);
686                 skb_reserve(lb, NS_SMBUFSIZE);
687                 push_rxbufs(card, lb);
688                 /* Due to the implementation of push_rxbufs() this is 1, not 0 */
689                 if (j == 1) {
690                         card->rcbuf = lb;
691                         card->rawcell = (struct ns_rcqe *) lb->data;
692                         card->rawch = NS_PRV_DMA(lb);
693                 }
694         }
695         /* Test for strange behaviour which leads to crashes */
696         if ((bcount =
697              ns_stat_lfbqc_get(readl(card->membase + STAT))) < card->lbnr.min) {
698                 printk
699                     ("nicstar%d: Strange... Just allocated %d large buffers and lfbqc = %d.\n",
700                      i, j, bcount);
701                 error = 14;
702                 ns_init_card_error(card, error);
703                 return error;
704         }
705
706         /* Allocate small buffers */
707         skb_queue_head_init(&card->sbpool.queue);
708         card->sbpool.count = 0; /* Not used */
709         for (j = 0; j < NUM_SB; j++) {
710                 struct sk_buff *sb;
711                 sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
712                 if (sb == NULL) {
713                         printk
714                             ("nicstar%d: can't allocate %dth of %d small buffers.\n",
715                              i, j, NUM_SB);
716                         error = 15;
717                         ns_init_card_error(card, error);
718                         return error;
719                 }
720                 NS_PRV_BUFTYPE(sb) = BUF_SM;
721                 skb_queue_tail(&card->sbpool.queue, sb);
722                 skb_reserve(sb, NS_AAL0_HEADER);
723                 push_rxbufs(card, sb);
724         }
725         /* Test for strange behaviour which leads to crashes */
726         if ((bcount =
727              ns_stat_sfbqc_get(readl(card->membase + STAT))) < card->sbnr.min) {
728                 printk
729                     ("nicstar%d: Strange... Just allocated %d small buffers and sfbqc = %d.\n",
730                      i, j, bcount);
731                 error = 15;
732                 ns_init_card_error(card, error);
733                 return error;
734         }
735
736         /* Allocate iovec buffers */
737         skb_queue_head_init(&card->iovpool.queue);
738         card->iovpool.count = 0;
739         for (j = 0; j < NUM_IOVB; j++) {
740                 struct sk_buff *iovb;
741                 iovb = alloc_skb(NS_IOVBUFSIZE, GFP_KERNEL);
742                 if (iovb == NULL) {
743                         printk
744                             ("nicstar%d: can't allocate %dth of %d iovec buffers.\n",
745                              i, j, NUM_IOVB);
746                         error = 16;
747                         ns_init_card_error(card, error);
748                         return error;
749                 }
750                 NS_PRV_BUFTYPE(iovb) = BUF_NONE;
751                 skb_queue_tail(&card->iovpool.queue, iovb);
752                 card->iovpool.count++;
753         }
754
755         /* Configure NICStAR */
756         if (card->rct_size == 4096)
757                 ns_cfg_rctsize = NS_CFG_RCTSIZE_4096_ENTRIES;
758         else                    /* (card->rct_size == 16384) */
759                 ns_cfg_rctsize = NS_CFG_RCTSIZE_16384_ENTRIES;
760
761         card->efbie = 1;
762
763         card->intcnt = 0;
764         if (request_irq
765             (pcidev->irq, &ns_irq_handler, IRQF_SHARED, "nicstar", card) != 0) {
766                 printk("nicstar%d: can't allocate IRQ %d.\n", i, pcidev->irq);
767                 error = 9;
768                 ns_init_card_error(card, error);
769                 return error;
770         }
771
772         /* Register device */
773         card->atmdev = atm_dev_register("nicstar", &card->pcidev->dev, &atm_ops,
774                                         -1, NULL);
775         if (card->atmdev == NULL) {
776                 printk("nicstar%d: can't register device.\n", i);
777                 error = 17;
778                 ns_init_card_error(card, error);
779                 return error;
780         }
781
782         if (ns_parse_mac(mac[i], card->atmdev->esi)) {
783                 nicstar_read_eprom(card->membase, NICSTAR_EPROM_MAC_ADDR_OFFSET,
784                                    card->atmdev->esi, 6);
785                 if (memcmp(card->atmdev->esi, "\x00\x00\x00\x00\x00\x00", 6) ==
786                     0) {
787                         nicstar_read_eprom(card->membase,
788                                            NICSTAR_EPROM_MAC_ADDR_OFFSET_ALT,
789                                            card->atmdev->esi, 6);
790                 }
791         }
792
793         printk("nicstar%d: MAC address %pM\n", i, card->atmdev->esi);
794
795         card->atmdev->dev_data = card;
796         card->atmdev->ci_range.vpi_bits = card->vpibits;
797         card->atmdev->ci_range.vci_bits = card->vcibits;
798         card->atmdev->link_rate = card->max_pcr;
799         card->atmdev->phy = NULL;
800
801 #ifdef CONFIG_ATM_NICSTAR_USE_SUNI
802         if (card->max_pcr == ATM_OC3_PCR)
803                 suni_init(card->atmdev);
804 #endif /* CONFIG_ATM_NICSTAR_USE_SUNI */
805
806 #ifdef CONFIG_ATM_NICSTAR_USE_IDT77105
807         if (card->max_pcr == ATM_25_PCR)
808                 idt77105_init(card->atmdev);
809 #endif /* CONFIG_ATM_NICSTAR_USE_IDT77105 */
810
811         if (card->atmdev->phy && card->atmdev->phy->start)
812                 card->atmdev->phy->start(card->atmdev);
813
814         writel(NS_CFG_RXPATH | NS_CFG_SMBUFSIZE | NS_CFG_LGBUFSIZE | NS_CFG_EFBIE | NS_CFG_RSQSIZE | NS_CFG_VPIBITS | ns_cfg_rctsize | NS_CFG_RXINT_NODELAY | NS_CFG_RAWIE |    /* Only enabled if RCQ_SUPPORT */
815                NS_CFG_RSQAFIE | NS_CFG_TXEN | NS_CFG_TXIE | NS_CFG_TSQFIE_OPT | /* Only enabled if ENABLE_TSQFIE */
816                NS_CFG_PHYIE, card->membase + CFG);
817
818         num_cards++;
819
820         return error;
821 }
822
823 static void ns_init_card_error(ns_dev *card, int error)
824 {
825         if (error >= 17) {
826                 writel(0x00000000, card->membase + CFG);
827         }
828         if (error >= 16) {
829                 struct sk_buff *iovb;
830                 while ((iovb = skb_dequeue(&card->iovpool.queue)) != NULL)
831                         dev_kfree_skb_any(iovb);
832         }
833         if (error >= 15) {
834                 struct sk_buff *sb;
835                 while ((sb = skb_dequeue(&card->sbpool.queue)) != NULL)
836                         dev_kfree_skb_any(sb);
837                 free_scq(card, card->scq0, NULL);
838         }
839         if (error >= 14) {
840                 struct sk_buff *lb;
841                 while ((lb = skb_dequeue(&card->lbpool.queue)) != NULL)
842                         dev_kfree_skb_any(lb);
843         }
844         if (error >= 13) {
845                 struct sk_buff *hb;
846                 while ((hb = skb_dequeue(&card->hbpool.queue)) != NULL)
847                         dev_kfree_skb_any(hb);
848         }
849         if (error >= 12) {
850                 kfree(card->rsq.org);
851         }
852         if (error >= 11) {
853                 kfree(card->tsq.org);
854         }
855         if (error >= 10) {
856                 free_irq(card->pcidev->irq, card);
857         }
858         if (error >= 4) {
859                 iounmap(card->membase);
860         }
861         if (error >= 3) {
862                 pci_disable_device(card->pcidev);
863                 kfree(card);
864         }
865 }
866
867 static scq_info *get_scq(ns_dev *card, int size, u32 scd)
868 {
869         scq_info *scq;
870         int i;
871
872         if (size != VBR_SCQSIZE && size != CBR_SCQSIZE)
873                 return NULL;
874
875         scq = kmalloc(sizeof(scq_info), GFP_KERNEL);
876         if (!scq)
877                 return NULL;
878         scq->org = pci_alloc_consistent(card->pcidev, 2 * size, &scq->dma);
879         if (!scq->org) {
880                 kfree(scq);
881                 return NULL;
882         }
883         scq->skb = kmalloc(sizeof(struct sk_buff *) *
884                            (size / NS_SCQE_SIZE), GFP_KERNEL);
885         if (!scq->skb) {
886                 kfree(scq->org);
887                 kfree(scq);
888                 return NULL;
889         }
890         scq->num_entries = size / NS_SCQE_SIZE;
891         scq->base = PTR_ALIGN(scq->org, size);
892         scq->next = scq->base;
893         scq->last = scq->base + (scq->num_entries - 1);
894         scq->tail = scq->last;
895         scq->scd = scd;
896         scq->num_entries = size / NS_SCQE_SIZE;
897         scq->tbd_count = 0;
898         init_waitqueue_head(&scq->scqfull_waitq);
899         scq->full = 0;
900         spin_lock_init(&scq->lock);
901
902         for (i = 0; i < scq->num_entries; i++)
903                 scq->skb[i] = NULL;
904
905         return scq;
906 }
907
908 /* For variable rate SCQ vcc must be NULL */
909 static void free_scq(ns_dev *card, scq_info *scq, struct atm_vcc *vcc)
910 {
911         int i;
912
913         if (scq->num_entries == VBR_SCQ_NUM_ENTRIES)
914                 for (i = 0; i < scq->num_entries; i++) {
915                         if (scq->skb[i] != NULL) {
916                                 vcc = ATM_SKB(scq->skb[i])->vcc;
917                                 if (vcc->pop != NULL)
918                                         vcc->pop(vcc, scq->skb[i]);
919                                 else
920                                         dev_kfree_skb_any(scq->skb[i]);
921                         }
922         } else {                /* vcc must be != NULL */
923
924                 if (vcc == NULL) {
925                         printk
926                             ("nicstar: free_scq() called with vcc == NULL for fixed rate scq.");
927                         for (i = 0; i < scq->num_entries; i++)
928                                 dev_kfree_skb_any(scq->skb[i]);
929                 } else
930                         for (i = 0; i < scq->num_entries; i++) {
931                                 if (scq->skb[i] != NULL) {
932                                         if (vcc->pop != NULL)
933                                                 vcc->pop(vcc, scq->skb[i]);
934                                         else
935                                                 dev_kfree_skb_any(scq->skb[i]);
936                                 }
937                         }
938         }
939         kfree(scq->skb);
940         pci_free_consistent(card->pcidev,
941                             2 * (scq->num_entries == VBR_SCQ_NUM_ENTRIES ?
942                                  VBR_SCQSIZE : CBR_SCQSIZE),
943                             scq->org, scq->dma);
944         kfree(scq);
945 }
946
947 /* The handles passed must be pointers to the sk_buff containing the small
948    or large buffer(s) cast to u32. */
949 static void push_rxbufs(ns_dev * card, struct sk_buff *skb)
950 {
951         struct sk_buff *handle1, *handle2;
952         u32 id1 = 0, id2 = 0;
953         u32 addr1, addr2;
954         u32 stat;
955         unsigned long flags;
956         int err;
957
958         /* *BARF* */
959         handle2 = NULL;
960         addr2 = 0;
961         handle1 = skb;
962         addr1 = pci_map_single(card->pcidev,
963                                skb->data,
964                                (NS_PRV_BUFTYPE(skb) == BUF_SM
965                                 ? NS_SMSKBSIZE : NS_LGSKBSIZE),
966                                PCI_DMA_TODEVICE);
967         NS_PRV_DMA(skb) = addr1; /* save so we can unmap later */
968
969 #ifdef GENERAL_DEBUG
970         if (!addr1)
971                 printk("nicstar%d: push_rxbufs called with addr1 = 0.\n",
972                        card->index);
973 #endif /* GENERAL_DEBUG */
974
975         stat = readl(card->membase + STAT);
976         card->sbfqc = ns_stat_sfbqc_get(stat);
977         card->lbfqc = ns_stat_lfbqc_get(stat);
978         if (NS_PRV_BUFTYPE(skb) == BUF_SM) {
979                 if (!addr2) {
980                         if (card->sm_addr) {
981                                 addr2 = card->sm_addr;
982                                 handle2 = card->sm_handle;
983                                 card->sm_addr = 0x00000000;
984                                 card->sm_handle = 0x00000000;
985                         } else {        /* (!sm_addr) */
986
987                                 card->sm_addr = addr1;
988                                 card->sm_handle = handle1;
989                         }
990                 }
991         } else {                /* buf_type == BUF_LG */
992
993                 if (!addr2) {
994                         if (card->lg_addr) {
995                                 addr2 = card->lg_addr;
996                                 handle2 = card->lg_handle;
997                                 card->lg_addr = 0x00000000;
998                                 card->lg_handle = 0x00000000;
999                         } else {        /* (!lg_addr) */
1000
1001                                 card->lg_addr = addr1;
1002                                 card->lg_handle = handle1;
1003                         }
1004                 }
1005         }
1006
1007         if (addr2) {
1008                 if (NS_PRV_BUFTYPE(skb) == BUF_SM) {
1009                         if (card->sbfqc >= card->sbnr.max) {
1010                                 skb_unlink(handle1, &card->sbpool.queue);
1011                                 dev_kfree_skb_any(handle1);
1012                                 skb_unlink(handle2, &card->sbpool.queue);
1013                                 dev_kfree_skb_any(handle2);
1014                                 return;
1015                         } else
1016                                 card->sbfqc += 2;
1017                 } else {        /* (buf_type == BUF_LG) */
1018
1019                         if (card->lbfqc >= card->lbnr.max) {
1020                                 skb_unlink(handle1, &card->lbpool.queue);
1021                                 dev_kfree_skb_any(handle1);
1022                                 skb_unlink(handle2, &card->lbpool.queue);
1023                                 dev_kfree_skb_any(handle2);
1024                                 return;
1025                         } else
1026                                 card->lbfqc += 2;
1027                 }
1028
1029                 do {
1030                         if (!idr_pre_get(&card->idr, GFP_ATOMIC)) {
1031                                 printk(KERN_ERR
1032                                        "nicstar%d: no free memory for idr\n",
1033                                        card->index);
1034                                 goto out;
1035                         }
1036
1037                         if (!id1)
1038                                 err = idr_get_new_above(&card->idr, handle1, 0, &id1);
1039
1040                         if (!id2 && err == 0)
1041                                 err = idr_get_new_above(&card->idr, handle2, 0, &id2);
1042
1043                 } while (err == -EAGAIN);
1044
1045                 if (err)
1046                         goto out;
1047
1048                 spin_lock_irqsave(&card->res_lock, flags);
1049                 while (CMD_BUSY(card)) ;
1050                 writel(addr2, card->membase + DR3);
1051                 writel(id2, card->membase + DR2);
1052                 writel(addr1, card->membase + DR1);
1053                 writel(id1, card->membase + DR0);
1054                 writel(NS_CMD_WRITE_FREEBUFQ | NS_PRV_BUFTYPE(skb),
1055                        card->membase + CMD);
1056                 spin_unlock_irqrestore(&card->res_lock, flags);
1057
1058                 XPRINTK("nicstar%d: Pushing %s buffers at 0x%x and 0x%x.\n",
1059                         card->index,
1060                         (NS_PRV_BUFTYPE(skb) == BUF_SM ? "small" : "large"),
1061                         addr1, addr2);
1062         }
1063
1064         if (!card->efbie && card->sbfqc >= card->sbnr.min &&
1065             card->lbfqc >= card->lbnr.min) {
1066                 card->efbie = 1;
1067                 writel((readl(card->membase + CFG) | NS_CFG_EFBIE),
1068                        card->membase + CFG);
1069         }
1070
1071 out:
1072         return;
1073 }
1074
1075 static irqreturn_t ns_irq_handler(int irq, void *dev_id)
1076 {
1077         u32 stat_r;
1078         ns_dev *card;
1079         struct atm_dev *dev;
1080         unsigned long flags;
1081
1082         card = (ns_dev *) dev_id;
1083         dev = card->atmdev;
1084         card->intcnt++;
1085
1086         PRINTK("nicstar%d: NICStAR generated an interrupt\n", card->index);
1087
1088         spin_lock_irqsave(&card->int_lock, flags);
1089
1090         stat_r = readl(card->membase + STAT);
1091
1092         /* Transmit Status Indicator has been written to T. S. Queue */
1093         if (stat_r & NS_STAT_TSIF) {
1094                 TXPRINTK("nicstar%d: TSI interrupt\n", card->index);
1095                 process_tsq(card);
1096                 writel(NS_STAT_TSIF, card->membase + STAT);
1097         }
1098
1099         /* Incomplete CS-PDU has been transmitted */
1100         if (stat_r & NS_STAT_TXICP) {
1101                 writel(NS_STAT_TXICP, card->membase + STAT);
1102                 TXPRINTK("nicstar%d: Incomplete CS-PDU transmitted.\n",
1103                          card->index);
1104         }
1105
1106         /* Transmit Status Queue 7/8 full */
1107         if (stat_r & NS_STAT_TSQF) {
1108                 writel(NS_STAT_TSQF, card->membase + STAT);
1109                 PRINTK("nicstar%d: TSQ full.\n", card->index);
1110                 process_tsq(card);
1111         }
1112
1113         /* Timer overflow */
1114         if (stat_r & NS_STAT_TMROF) {
1115                 writel(NS_STAT_TMROF, card->membase + STAT);
1116                 PRINTK("nicstar%d: Timer overflow.\n", card->index);
1117         }
1118
1119         /* PHY device interrupt signal active */
1120         if (stat_r & NS_STAT_PHYI) {
1121                 writel(NS_STAT_PHYI, card->membase + STAT);
1122                 PRINTK("nicstar%d: PHY interrupt.\n", card->index);
1123                 if (dev->phy && dev->phy->interrupt) {
1124                         dev->phy->interrupt(dev);
1125                 }
1126         }
1127
1128         /* Small Buffer Queue is full */
1129         if (stat_r & NS_STAT_SFBQF) {
1130                 writel(NS_STAT_SFBQF, card->membase + STAT);
1131                 printk("nicstar%d: Small free buffer queue is full.\n",
1132                        card->index);
1133         }
1134
1135         /* Large Buffer Queue is full */
1136         if (stat_r & NS_STAT_LFBQF) {
1137                 writel(NS_STAT_LFBQF, card->membase + STAT);
1138                 printk("nicstar%d: Large free buffer queue is full.\n",
1139                        card->index);
1140         }
1141
1142         /* Receive Status Queue is full */
1143         if (stat_r & NS_STAT_RSQF) {
1144                 writel(NS_STAT_RSQF, card->membase + STAT);
1145                 printk("nicstar%d: RSQ full.\n", card->index);
1146                 process_rsq(card);
1147         }
1148
1149         /* Complete CS-PDU received */
1150         if (stat_r & NS_STAT_EOPDU) {
1151                 RXPRINTK("nicstar%d: End of CS-PDU received.\n", card->index);
1152                 process_rsq(card);
1153                 writel(NS_STAT_EOPDU, card->membase + STAT);
1154         }
1155
1156         /* Raw cell received */
1157         if (stat_r & NS_STAT_RAWCF) {
1158                 writel(NS_STAT_RAWCF, card->membase + STAT);
1159 #ifndef RCQ_SUPPORT
1160                 printk("nicstar%d: Raw cell received and no support yet...\n",
1161                        card->index);
1162 #endif /* RCQ_SUPPORT */
1163                 /* NOTE: the following procedure may keep a raw cell pending until the
1164                    next interrupt. As this preliminary support is only meant to
1165                    avoid buffer leakage, this is not an issue. */
1166                 while (readl(card->membase + RAWCT) != card->rawch) {
1167
1168                         if (ns_rcqe_islast(card->rawcell)) {
1169                                 struct sk_buff *oldbuf;
1170
1171                                 oldbuf = card->rcbuf;
1172                                 card->rcbuf = idr_find(&card->idr,
1173                                                        ns_rcqe_nextbufhandle(card->rawcell));
1174                                 card->rawch = NS_PRV_DMA(card->rcbuf);
1175                                 card->rawcell = (struct ns_rcqe *)
1176                                                 card->rcbuf->data;
1177                                 recycle_rx_buf(card, oldbuf);
1178                         } else {
1179                                 card->rawch += NS_RCQE_SIZE;
1180                                 card->rawcell++;
1181                         }
1182                 }
1183         }
1184
1185         /* Small buffer queue is empty */
1186         if (stat_r & NS_STAT_SFBQE) {
1187                 int i;
1188                 struct sk_buff *sb;
1189
1190                 writel(NS_STAT_SFBQE, card->membase + STAT);
1191                 printk("nicstar%d: Small free buffer queue empty.\n",
1192                        card->index);
1193                 for (i = 0; i < card->sbnr.min; i++) {
1194                         sb = dev_alloc_skb(NS_SMSKBSIZE);
1195                         if (sb == NULL) {
1196                                 writel(readl(card->membase + CFG) &
1197                                        ~NS_CFG_EFBIE, card->membase + CFG);
1198                                 card->efbie = 0;
1199                                 break;
1200                         }
1201                         NS_PRV_BUFTYPE(sb) = BUF_SM;
1202                         skb_queue_tail(&card->sbpool.queue, sb);
1203                         skb_reserve(sb, NS_AAL0_HEADER);
1204                         push_rxbufs(card, sb);
1205                 }
1206                 card->sbfqc = i;
1207                 process_rsq(card);
1208         }
1209
1210         /* Large buffer queue empty */
1211         if (stat_r & NS_STAT_LFBQE) {
1212                 int i;
1213                 struct sk_buff *lb;
1214
1215                 writel(NS_STAT_LFBQE, card->membase + STAT);
1216                 printk("nicstar%d: Large free buffer queue empty.\n",
1217                        card->index);
1218                 for (i = 0; i < card->lbnr.min; i++) {
1219                         lb = dev_alloc_skb(NS_LGSKBSIZE);
1220                         if (lb == NULL) {
1221                                 writel(readl(card->membase + CFG) &
1222                                        ~NS_CFG_EFBIE, card->membase + CFG);
1223                                 card->efbie = 0;
1224                                 break;
1225                         }
1226                         NS_PRV_BUFTYPE(lb) = BUF_LG;
1227                         skb_queue_tail(&card->lbpool.queue, lb);
1228                         skb_reserve(lb, NS_SMBUFSIZE);
1229                         push_rxbufs(card, lb);
1230                 }
1231                 card->lbfqc = i;
1232                 process_rsq(card);
1233         }
1234
1235         /* Receive Status Queue is 7/8 full */
1236         if (stat_r & NS_STAT_RSQAF) {
1237                 writel(NS_STAT_RSQAF, card->membase + STAT);
1238                 RXPRINTK("nicstar%d: RSQ almost full.\n", card->index);
1239                 process_rsq(card);
1240         }
1241
1242         spin_unlock_irqrestore(&card->int_lock, flags);
1243         PRINTK("nicstar%d: end of interrupt service\n", card->index);
1244         return IRQ_HANDLED;
1245 }
1246
1247 static int ns_open(struct atm_vcc *vcc)
1248 {
1249         ns_dev *card;
1250         vc_map *vc;
1251         unsigned long tmpl, modl;
1252         int tcr, tcra;          /* target cell rate, and absolute value */
1253         int n = 0;              /* Number of entries in the TST. Initialized to remove
1254                                    the compiler warning. */
1255         u32 u32d[4];
1256         int frscdi = 0;         /* Index of the SCD. Initialized to remove the compiler
1257                                    warning. How I wish compilers were clever enough to
1258                                    tell which variables can truly be used
1259                                    uninitialized... */
1260         int inuse;              /* tx or rx vc already in use by another vcc */
1261         short vpi = vcc->vpi;
1262         int vci = vcc->vci;
1263
1264         card = (ns_dev *) vcc->dev->dev_data;
1265         PRINTK("nicstar%d: opening vpi.vci %d.%d \n", card->index, (int)vpi,
1266                vci);
1267         if (vcc->qos.aal != ATM_AAL5 && vcc->qos.aal != ATM_AAL0) {
1268                 PRINTK("nicstar%d: unsupported AAL.\n", card->index);
1269                 return -EINVAL;
1270         }
1271
1272         vc = &(card->vcmap[vpi << card->vcibits | vci]);
1273         vcc->dev_data = vc;
1274
1275         inuse = 0;
1276         if (vcc->qos.txtp.traffic_class != ATM_NONE && vc->tx)
1277                 inuse = 1;
1278         if (vcc->qos.rxtp.traffic_class != ATM_NONE && vc->rx)
1279                 inuse += 2;
1280         if (inuse) {
1281                 printk("nicstar%d: %s vci already in use.\n", card->index,
1282                        inuse == 1 ? "tx" : inuse == 2 ? "rx" : "tx and rx");
1283                 return -EINVAL;
1284         }
1285
1286         set_bit(ATM_VF_ADDR, &vcc->flags);
1287
1288         /* NOTE: You are not allowed to modify an open connection's QOS. To change
1289            that, remove the ATM_VF_PARTIAL flag checking. There may be other changes
1290            needed to do that. */
1291         if (!test_bit(ATM_VF_PARTIAL, &vcc->flags)) {
1292                 scq_info *scq;
1293
1294                 set_bit(ATM_VF_PARTIAL, &vcc->flags);
1295                 if (vcc->qos.txtp.traffic_class == ATM_CBR) {
1296                         /* Check requested cell rate and availability of SCD */
1297                         if (vcc->qos.txtp.max_pcr == 0 && vcc->qos.txtp.pcr == 0
1298                             && vcc->qos.txtp.min_pcr == 0) {
1299                                 PRINTK
1300                                     ("nicstar%d: trying to open a CBR vc with cell rate = 0 \n",
1301                                      card->index);
1302                                 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1303                                 clear_bit(ATM_VF_ADDR, &vcc->flags);
1304                                 return -EINVAL;
1305                         }
1306
1307                         tcr = atm_pcr_goal(&(vcc->qos.txtp));
1308                         tcra = tcr >= 0 ? tcr : -tcr;
1309
1310                         PRINTK("nicstar%d: target cell rate = %d.\n",
1311                                card->index, vcc->qos.txtp.max_pcr);
1312
1313                         tmpl =
1314                             (unsigned long)tcra *(unsigned long)
1315                             NS_TST_NUM_ENTRIES;
1316                         modl = tmpl % card->max_pcr;
1317
1318                         n = (int)(tmpl / card->max_pcr);
1319                         if (tcr > 0) {
1320                                 if (modl > 0)
1321                                         n++;
1322                         } else if (tcr == 0) {
1323                                 if ((n =
1324                                      (card->tst_free_entries -
1325                                       NS_TST_RESERVED)) <= 0) {
1326                                         PRINTK
1327                                             ("nicstar%d: no CBR bandwidth free.\n",
1328                                              card->index);
1329                                         clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1330                                         clear_bit(ATM_VF_ADDR, &vcc->flags);
1331                                         return -EINVAL;
1332                                 }
1333                         }
1334
1335                         if (n == 0) {
1336                                 printk
1337                                     ("nicstar%d: selected bandwidth < granularity.\n",
1338                                      card->index);
1339                                 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1340                                 clear_bit(ATM_VF_ADDR, &vcc->flags);
1341                                 return -EINVAL;
1342                         }
1343
1344                         if (n > (card->tst_free_entries - NS_TST_RESERVED)) {
1345                                 PRINTK
1346                                     ("nicstar%d: not enough free CBR bandwidth.\n",
1347                                      card->index);
1348                                 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1349                                 clear_bit(ATM_VF_ADDR, &vcc->flags);
1350                                 return -EINVAL;
1351                         } else
1352                                 card->tst_free_entries -= n;
1353
1354                         XPRINTK("nicstar%d: writing %d tst entries.\n",
1355                                 card->index, n);
1356                         for (frscdi = 0; frscdi < NS_FRSCD_NUM; frscdi++) {
1357                                 if (card->scd2vc[frscdi] == NULL) {
1358                                         card->scd2vc[frscdi] = vc;
1359                                         break;
1360                                 }
1361                         }
1362                         if (frscdi == NS_FRSCD_NUM) {
1363                                 PRINTK
1364                                     ("nicstar%d: no SCD available for CBR channel.\n",
1365                                      card->index);
1366                                 card->tst_free_entries += n;
1367                                 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1368                                 clear_bit(ATM_VF_ADDR, &vcc->flags);
1369                                 return -EBUSY;
1370                         }
1371
1372                         vc->cbr_scd = NS_FRSCD + frscdi * NS_FRSCD_SIZE;
1373
1374                         scq = get_scq(card, CBR_SCQSIZE, vc->cbr_scd);
1375                         if (scq == NULL) {
1376                                 PRINTK("nicstar%d: can't get fixed rate SCQ.\n",
1377                                        card->index);
1378                                 card->scd2vc[frscdi] = NULL;
1379                                 card->tst_free_entries += n;
1380                                 clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1381                                 clear_bit(ATM_VF_ADDR, &vcc->flags);
1382                                 return -ENOMEM;
1383                         }
1384                         vc->scq = scq;
1385                         u32d[0] = scq_virt_to_bus(scq, scq->base);
1386                         u32d[1] = (u32) 0x00000000;
1387                         u32d[2] = (u32) 0xffffffff;
1388                         u32d[3] = (u32) 0x00000000;
1389                         ns_write_sram(card, vc->cbr_scd, u32d, 4);
1390
1391                         fill_tst(card, n, vc);
1392                 } else if (vcc->qos.txtp.traffic_class == ATM_UBR) {
1393                         vc->cbr_scd = 0x00000000;
1394                         vc->scq = card->scq0;
1395                 }
1396
1397                 if (vcc->qos.txtp.traffic_class != ATM_NONE) {
1398                         vc->tx = 1;
1399                         vc->tx_vcc = vcc;
1400                         vc->tbd_count = 0;
1401                 }
1402                 if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
1403                         u32 status;
1404
1405                         vc->rx = 1;
1406                         vc->rx_vcc = vcc;
1407                         vc->rx_iov = NULL;
1408
1409                         /* Open the connection in hardware */
1410                         if (vcc->qos.aal == ATM_AAL5)
1411                                 status = NS_RCTE_AAL5 | NS_RCTE_CONNECTOPEN;
1412                         else    /* vcc->qos.aal == ATM_AAL0 */
1413                                 status = NS_RCTE_AAL0 | NS_RCTE_CONNECTOPEN;
1414 #ifdef RCQ_SUPPORT
1415                         status |= NS_RCTE_RAWCELLINTEN;
1416 #endif /* RCQ_SUPPORT */
1417                         ns_write_sram(card,
1418                                       NS_RCT +
1419                                       (vpi << card->vcibits | vci) *
1420                                       NS_RCT_ENTRY_SIZE, &status, 1);
1421                 }
1422
1423         }
1424
1425         set_bit(ATM_VF_READY, &vcc->flags);
1426         return 0;
1427 }
1428
1429 static void ns_close(struct atm_vcc *vcc)
1430 {
1431         vc_map *vc;
1432         ns_dev *card;
1433         u32 data;
1434         int i;
1435
1436         vc = vcc->dev_data;
1437         card = vcc->dev->dev_data;
1438         PRINTK("nicstar%d: closing vpi.vci %d.%d \n", card->index,
1439                (int)vcc->vpi, vcc->vci);
1440
1441         clear_bit(ATM_VF_READY, &vcc->flags);
1442
1443         if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
1444                 u32 addr;
1445                 unsigned long flags;
1446
1447                 addr =
1448                     NS_RCT +
1449                     (vcc->vpi << card->vcibits | vcc->vci) * NS_RCT_ENTRY_SIZE;
1450                 spin_lock_irqsave(&card->res_lock, flags);
1451                 while (CMD_BUSY(card)) ;
1452                 writel(NS_CMD_CLOSE_CONNECTION | addr << 2,
1453                        card->membase + CMD);
1454                 spin_unlock_irqrestore(&card->res_lock, flags);
1455
1456                 vc->rx = 0;
1457                 if (vc->rx_iov != NULL) {
1458                         struct sk_buff *iovb;
1459                         u32 stat;
1460
1461                         stat = readl(card->membase + STAT);
1462                         card->sbfqc = ns_stat_sfbqc_get(stat);
1463                         card->lbfqc = ns_stat_lfbqc_get(stat);
1464
1465                         PRINTK
1466                             ("nicstar%d: closing a VC with pending rx buffers.\n",
1467                              card->index);
1468                         iovb = vc->rx_iov;
1469                         recycle_iovec_rx_bufs(card, (struct iovec *)iovb->data,
1470                                               NS_PRV_IOVCNT(iovb));
1471                         NS_PRV_IOVCNT(iovb) = 0;
1472                         spin_lock_irqsave(&card->int_lock, flags);
1473                         recycle_iov_buf(card, iovb);
1474                         spin_unlock_irqrestore(&card->int_lock, flags);
1475                         vc->rx_iov = NULL;
1476                 }
1477         }
1478
1479         if (vcc->qos.txtp.traffic_class != ATM_NONE) {
1480                 vc->tx = 0;
1481         }
1482
1483         if (vcc->qos.txtp.traffic_class == ATM_CBR) {
1484                 unsigned long flags;
1485                 ns_scqe *scqep;
1486                 scq_info *scq;
1487
1488                 scq = vc->scq;
1489
1490                 for (;;) {
1491                         spin_lock_irqsave(&scq->lock, flags);
1492                         scqep = scq->next;
1493                         if (scqep == scq->base)
1494                                 scqep = scq->last;
1495                         else
1496                                 scqep--;
1497                         if (scqep == scq->tail) {
1498                                 spin_unlock_irqrestore(&scq->lock, flags);
1499                                 break;
1500                         }
1501                         /* If the last entry is not a TSR, place one in the SCQ in order to
1502                            be able to completely drain it and then close. */
1503                         if (!ns_scqe_is_tsr(scqep) && scq->tail != scq->next) {
1504                                 ns_scqe tsr;
1505                                 u32 scdi, scqi;
1506                                 u32 data;
1507                                 int index;
1508
1509                                 tsr.word_1 = ns_tsr_mkword_1(NS_TSR_INTENABLE);
1510                                 scdi = (vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE;
1511                                 scqi = scq->next - scq->base;
1512                                 tsr.word_2 = ns_tsr_mkword_2(scdi, scqi);
1513                                 tsr.word_3 = 0x00000000;
1514                                 tsr.word_4 = 0x00000000;
1515                                 *scq->next = tsr;
1516                                 index = (int)scqi;
1517                                 scq->skb[index] = NULL;
1518                                 if (scq->next == scq->last)
1519                                         scq->next = scq->base;
1520                                 else
1521                                         scq->next++;
1522                                 data = scq_virt_to_bus(scq, scq->next);
1523                                 ns_write_sram(card, scq->scd, &data, 1);
1524                         }
1525                         spin_unlock_irqrestore(&scq->lock, flags);
1526                         schedule();
1527                 }
1528
1529                 /* Free all TST entries */
1530                 data = NS_TST_OPCODE_VARIABLE;
1531                 for (i = 0; i < NS_TST_NUM_ENTRIES; i++) {
1532                         if (card->tste2vc[i] == vc) {
1533                                 ns_write_sram(card, card->tst_addr + i, &data,
1534                                               1);
1535                                 card->tste2vc[i] = NULL;
1536                                 card->tst_free_entries++;
1537                         }
1538                 }
1539
1540                 card->scd2vc[(vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE] = NULL;
1541                 free_scq(card, vc->scq, vcc);
1542         }
1543
1544         /* remove all references to vcc before deleting it */
1545         if (vcc->qos.txtp.traffic_class != ATM_NONE) {
1546                 unsigned long flags;
1547                 scq_info *scq = card->scq0;
1548
1549                 spin_lock_irqsave(&scq->lock, flags);
1550
1551                 for (i = 0; i < scq->num_entries; i++) {
1552                         if (scq->skb[i] && ATM_SKB(scq->skb[i])->vcc == vcc) {
1553                                 ATM_SKB(scq->skb[i])->vcc = NULL;
1554                                 atm_return(vcc, scq->skb[i]->truesize);
1555                                 PRINTK
1556                                     ("nicstar: deleted pending vcc mapping\n");
1557                         }
1558                 }
1559
1560                 spin_unlock_irqrestore(&scq->lock, flags);
1561         }
1562
1563         vcc->dev_data = NULL;
1564         clear_bit(ATM_VF_PARTIAL, &vcc->flags);
1565         clear_bit(ATM_VF_ADDR, &vcc->flags);
1566
1567 #ifdef RX_DEBUG
1568         {
1569                 u32 stat, cfg;
1570                 stat = readl(card->membase + STAT);
1571                 cfg = readl(card->membase + CFG);
1572                 printk("STAT = 0x%08X  CFG = 0x%08X  \n", stat, cfg);
1573                 printk
1574                     ("TSQ: base = 0x%p  next = 0x%p  last = 0x%p  TSQT = 0x%08X \n",
1575                      card->tsq.base, card->tsq.next,
1576                      card->tsq.last, readl(card->membase + TSQT));
1577                 printk
1578                     ("RSQ: base = 0x%p  next = 0x%p  last = 0x%p  RSQT = 0x%08X \n",
1579                      card->rsq.base, card->rsq.next,
1580                      card->rsq.last, readl(card->membase + RSQT));
1581                 printk("Empty free buffer queue interrupt %s \n",
1582                        card->efbie ? "enabled" : "disabled");
1583                 printk("SBCNT = %d  count = %d   LBCNT = %d count = %d \n",
1584                        ns_stat_sfbqc_get(stat), card->sbpool.count,
1585                        ns_stat_lfbqc_get(stat), card->lbpool.count);
1586                 printk("hbpool.count = %d  iovpool.count = %d \n",
1587                        card->hbpool.count, card->iovpool.count);
1588         }
1589 #endif /* RX_DEBUG */
1590 }
1591
1592 static void fill_tst(ns_dev * card, int n, vc_map * vc)
1593 {
1594         u32 new_tst;
1595         unsigned long cl;
1596         int e, r;
1597         u32 data;
1598
1599         /* It would be very complicated to keep the two TSTs synchronized while
1600            assuring that writes are only made to the inactive TST. So, for now I
1601            will use only one TST. If problems occur, I will change this again */
1602
1603         new_tst = card->tst_addr;
1604
1605         /* Fill procedure */
1606
1607         for (e = 0; e < NS_TST_NUM_ENTRIES; e++) {
1608                 if (card->tste2vc[e] == NULL)
1609                         break;
1610         }
1611         if (e == NS_TST_NUM_ENTRIES) {
1612                 printk("nicstar%d: No free TST entries found. \n", card->index);
1613                 return;
1614         }
1615
1616         r = n;
1617         cl = NS_TST_NUM_ENTRIES;
1618         data = ns_tste_make(NS_TST_OPCODE_FIXED, vc->cbr_scd);
1619
1620         while (r > 0) {
1621                 if (cl >= NS_TST_NUM_ENTRIES && card->tste2vc[e] == NULL) {
1622                         card->tste2vc[e] = vc;
1623                         ns_write_sram(card, new_tst + e, &data, 1);
1624                         cl -= NS_TST_NUM_ENTRIES;
1625                         r--;
1626                 }
1627
1628                 if (++e == NS_TST_NUM_ENTRIES) {
1629                         e = 0;
1630                 }
1631                 cl += n;
1632         }
1633
1634         /* End of fill procedure */
1635
1636         data = ns_tste_make(NS_TST_OPCODE_END, new_tst);
1637         ns_write_sram(card, new_tst + NS_TST_NUM_ENTRIES, &data, 1);
1638         ns_write_sram(card, card->tst_addr + NS_TST_NUM_ENTRIES, &data, 1);
1639         card->tst_addr = new_tst;
1640 }
1641
1642 static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb)
1643 {
1644         ns_dev *card;
1645         vc_map *vc;
1646         scq_info *scq;
1647         unsigned long buflen;
1648         ns_scqe scqe;
1649         u32 flags;              /* TBD flags, not CPU flags */
1650
1651         card = vcc->dev->dev_data;
1652         TXPRINTK("nicstar%d: ns_send() called.\n", card->index);
1653         if ((vc = (vc_map *) vcc->dev_data) == NULL) {
1654                 printk("nicstar%d: vcc->dev_data == NULL on ns_send().\n",
1655                        card->index);
1656                 atomic_inc(&vcc->stats->tx_err);
1657                 dev_kfree_skb_any(skb);
1658                 return -EINVAL;
1659         }
1660
1661         if (!vc->tx) {
1662                 printk("nicstar%d: Trying to transmit on a non-tx VC.\n",
1663                        card->index);
1664                 atomic_inc(&vcc->stats->tx_err);
1665                 dev_kfree_skb_any(skb);
1666                 return -EINVAL;
1667         }
1668
1669         if (vcc->qos.aal != ATM_AAL5 && vcc->qos.aal != ATM_AAL0) {
1670                 printk("nicstar%d: Only AAL0 and AAL5 are supported.\n",
1671                        card->index);
1672                 atomic_inc(&vcc->stats->tx_err);
1673                 dev_kfree_skb_any(skb);
1674                 return -EINVAL;
1675         }
1676
1677         if (skb_shinfo(skb)->nr_frags != 0) {
1678                 printk("nicstar%d: No scatter-gather yet.\n", card->index);
1679                 atomic_inc(&vcc->stats->tx_err);
1680                 dev_kfree_skb_any(skb);
1681                 return -EINVAL;
1682         }
1683
1684         ATM_SKB(skb)->vcc = vcc;
1685
1686         NS_PRV_DMA(skb) = pci_map_single(card->pcidev, skb->data,
1687                                          skb->len, PCI_DMA_TODEVICE);
1688
1689         if (vcc->qos.aal == ATM_AAL5) {
1690                 buflen = (skb->len + 47 + 8) / 48 * 48; /* Multiple of 48 */
1691                 flags = NS_TBD_AAL5;
1692                 scqe.word_2 = cpu_to_le32(NS_PRV_DMA(skb));
1693                 scqe.word_3 = cpu_to_le32(skb->len);
1694                 scqe.word_4 =
1695                     ns_tbd_mkword_4(0, (u32) vcc->vpi, (u32) vcc->vci, 0,
1696                                     ATM_SKB(skb)->
1697                                     atm_options & ATM_ATMOPT_CLP ? 1 : 0);
1698                 flags |= NS_TBD_EOPDU;
1699         } else {                /* (vcc->qos.aal == ATM_AAL0) */
1700
1701                 buflen = ATM_CELL_PAYLOAD;      /* i.e., 48 bytes */
1702                 flags = NS_TBD_AAL0;
1703                 scqe.word_2 = cpu_to_le32(NS_PRV_DMA(skb) + NS_AAL0_HEADER);
1704                 scqe.word_3 = cpu_to_le32(0x00000000);
1705                 if (*skb->data & 0x02)  /* Payload type 1 - end of pdu */
1706                         flags |= NS_TBD_EOPDU;
1707                 scqe.word_4 =
1708                     cpu_to_le32(*((u32 *) skb->data) & ~NS_TBD_VC_MASK);
1709                 /* Force the VPI/VCI to be the same as in VCC struct */
1710                 scqe.word_4 |=
1711                     cpu_to_le32((((u32) vcc->
1712                                   vpi) << NS_TBD_VPI_SHIFT | ((u32) vcc->
1713                                                               vci) <<
1714                                  NS_TBD_VCI_SHIFT) & NS_TBD_VC_MASK);
1715         }
1716
1717         if (vcc->qos.txtp.traffic_class == ATM_CBR) {
1718                 scqe.word_1 = ns_tbd_mkword_1_novbr(flags, (u32) buflen);
1719                 scq = ((vc_map *) vcc->dev_data)->scq;
1720         } else {
1721                 scqe.word_1 =
1722                     ns_tbd_mkword_1(flags, (u32) 1, (u32) 1, (u32) buflen);
1723                 scq = card->scq0;
1724         }
1725
1726         if (push_scqe(card, vc, scq, &scqe, skb) != 0) {
1727                 atomic_inc(&vcc->stats->tx_err);
1728                 dev_kfree_skb_any(skb);
1729                 return -EIO;
1730         }
1731         atomic_inc(&vcc->stats->tx);
1732
1733         return 0;
1734 }
1735
1736 static int push_scqe(ns_dev * card, vc_map * vc, scq_info * scq, ns_scqe * tbd,
1737                      struct sk_buff *skb)
1738 {
1739         unsigned long flags;
1740         ns_scqe tsr;
1741         u32 scdi, scqi;
1742         int scq_is_vbr;
1743         u32 data;
1744         int index;
1745
1746         spin_lock_irqsave(&scq->lock, flags);
1747         while (scq->tail == scq->next) {
1748                 if (in_interrupt()) {
1749                         spin_unlock_irqrestore(&scq->lock, flags);
1750                         printk("nicstar%d: Error pushing TBD.\n", card->index);
1751                         return 1;
1752                 }
1753
1754                 scq->full = 1;
1755                 spin_unlock_irqrestore(&scq->lock, flags);
1756                 interruptible_sleep_on_timeout(&scq->scqfull_waitq,
1757                                                SCQFULL_TIMEOUT);
1758                 spin_lock_irqsave(&scq->lock, flags);
1759
1760                 if (scq->full) {
1761                         spin_unlock_irqrestore(&scq->lock, flags);
1762                         printk("nicstar%d: Timeout pushing TBD.\n",
1763                                card->index);
1764                         return 1;
1765                 }
1766         }
1767         *scq->next = *tbd;
1768         index = (int)(scq->next - scq->base);
1769         scq->skb[index] = skb;
1770         XPRINTK("nicstar%d: sending skb at 0x%p (pos %d).\n",
1771                 card->index, skb, index);
1772         XPRINTK("nicstar%d: TBD written:\n0x%x\n0x%x\n0x%x\n0x%x\n at 0x%p.\n",
1773                 card->index, le32_to_cpu(tbd->word_1), le32_to_cpu(tbd->word_2),
1774                 le32_to_cpu(tbd->word_3), le32_to_cpu(tbd->word_4),
1775                 scq->next);
1776         if (scq->next == scq->last)
1777                 scq->next = scq->base;
1778         else
1779                 scq->next++;
1780
1781         vc->tbd_count++;
1782         if (scq->num_entries == VBR_SCQ_NUM_ENTRIES) {
1783                 scq->tbd_count++;
1784                 scq_is_vbr = 1;
1785         } else
1786                 scq_is_vbr = 0;
1787
1788         if (vc->tbd_count >= MAX_TBD_PER_VC
1789             || scq->tbd_count >= MAX_TBD_PER_SCQ) {
1790                 int has_run = 0;
1791
1792                 while (scq->tail == scq->next) {
1793                         if (in_interrupt()) {
1794                                 data = scq_virt_to_bus(scq, scq->next);
1795                                 ns_write_sram(card, scq->scd, &data, 1);
1796                                 spin_unlock_irqrestore(&scq->lock, flags);
1797                                 printk("nicstar%d: Error pushing TSR.\n",
1798                                        card->index);
1799                                 return 0;
1800                         }
1801
1802                         scq->full = 1;
1803                         if (has_run++)
1804                                 break;
1805                         spin_unlock_irqrestore(&scq->lock, flags);
1806                         interruptible_sleep_on_timeout(&scq->scqfull_waitq,
1807                                                        SCQFULL_TIMEOUT);
1808                         spin_lock_irqsave(&scq->lock, flags);
1809                 }
1810
1811                 if (!scq->full) {
1812                         tsr.word_1 = ns_tsr_mkword_1(NS_TSR_INTENABLE);
1813                         if (scq_is_vbr)
1814                                 scdi = NS_TSR_SCDISVBR;
1815                         else
1816                                 scdi = (vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE;
1817                         scqi = scq->next - scq->base;
1818                         tsr.word_2 = ns_tsr_mkword_2(scdi, scqi);
1819                         tsr.word_3 = 0x00000000;
1820                         tsr.word_4 = 0x00000000;
1821
1822                         *scq->next = tsr;
1823                         index = (int)scqi;
1824                         scq->skb[index] = NULL;
1825                         XPRINTK
1826                             ("nicstar%d: TSR written:\n0x%x\n0x%x\n0x%x\n0x%x\n at 0x%p.\n",
1827                              card->index, le32_to_cpu(tsr.word_1),
1828                              le32_to_cpu(tsr.word_2), le32_to_cpu(tsr.word_3),
1829                              le32_to_cpu(tsr.word_4), scq->next);
1830                         if (scq->next == scq->last)
1831                                 scq->next = scq->base;
1832                         else
1833                                 scq->next++;
1834                         vc->tbd_count = 0;
1835                         scq->tbd_count = 0;
1836                 } else
1837                         PRINTK("nicstar%d: Timeout pushing TSR.\n",
1838                                card->index);
1839         }
1840         data = scq_virt_to_bus(scq, scq->next);
1841         ns_write_sram(card, scq->scd, &data, 1);
1842
1843         spin_unlock_irqrestore(&scq->lock, flags);
1844
1845         return 0;
1846 }
1847
1848 static void process_tsq(ns_dev * card)
1849 {
1850         u32 scdi;
1851         scq_info *scq;
1852         ns_tsi *previous = NULL, *one_ahead, *two_ahead;
1853         int serviced_entries;   /* flag indicating at least on entry was serviced */
1854
1855         serviced_entries = 0;
1856
1857         if (card->tsq.next == card->tsq.last)
1858                 one_ahead = card->tsq.base;
1859         else
1860                 one_ahead = card->tsq.next + 1;
1861
1862         if (one_ahead == card->tsq.last)
1863                 two_ahead = card->tsq.base;
1864         else
1865                 two_ahead = one_ahead + 1;
1866
1867         while (!ns_tsi_isempty(card->tsq.next) || !ns_tsi_isempty(one_ahead) ||
1868                !ns_tsi_isempty(two_ahead))
1869                 /* At most two empty, as stated in the 77201 errata */
1870         {
1871                 serviced_entries = 1;
1872
1873                 /* Skip the one or two possible empty entries */
1874                 while (ns_tsi_isempty(card->tsq.next)) {
1875                         if (card->tsq.next == card->tsq.last)
1876                                 card->tsq.next = card->tsq.base;
1877                         else
1878                                 card->tsq.next++;
1879                 }
1880
1881                 if (!ns_tsi_tmrof(card->tsq.next)) {
1882                         scdi = ns_tsi_getscdindex(card->tsq.next);
1883                         if (scdi == NS_TSI_SCDISVBR)
1884                                 scq = card->scq0;
1885                         else {
1886                                 if (card->scd2vc[scdi] == NULL) {
1887                                         printk
1888                                             ("nicstar%d: could not find VC from SCD index.\n",
1889                                              card->index);
1890                                         ns_tsi_init(card->tsq.next);
1891                                         return;
1892                                 }
1893                                 scq = card->scd2vc[scdi]->scq;
1894                         }
1895                         drain_scq(card, scq, ns_tsi_getscqpos(card->tsq.next));
1896                         scq->full = 0;
1897                         wake_up_interruptible(&(scq->scqfull_waitq));
1898                 }
1899
1900                 ns_tsi_init(card->tsq.next);
1901                 previous = card->tsq.next;
1902                 if (card->tsq.next == card->tsq.last)
1903                         card->tsq.next = card->tsq.base;
1904                 else
1905                         card->tsq.next++;
1906
1907                 if (card->tsq.next == card->tsq.last)
1908                         one_ahead = card->tsq.base;
1909                 else
1910                         one_ahead = card->tsq.next + 1;
1911
1912                 if (one_ahead == card->tsq.last)
1913                         two_ahead = card->tsq.base;
1914                 else
1915                         two_ahead = one_ahead + 1;
1916         }
1917
1918         if (serviced_entries)
1919                 writel(PTR_DIFF(previous, card->tsq.base),
1920                        card->membase + TSQH);
1921 }
1922
1923 static void drain_scq(ns_dev * card, scq_info * scq, int pos)
1924 {
1925         struct atm_vcc *vcc;
1926         struct sk_buff *skb;
1927         int i;
1928         unsigned long flags;
1929
1930         XPRINTK("nicstar%d: drain_scq() called, scq at 0x%p, pos %d.\n",
1931                 card->index, scq, pos);
1932         if (pos >= scq->num_entries) {
1933                 printk("nicstar%d: Bad index on drain_scq().\n", card->index);
1934                 return;
1935         }
1936
1937         spin_lock_irqsave(&scq->lock, flags);
1938         i = (int)(scq->tail - scq->base);
1939         if (++i == scq->num_entries)
1940                 i = 0;
1941         while (i != pos) {
1942                 skb = scq->skb[i];
1943                 XPRINTK("nicstar%d: freeing skb at 0x%p (index %d).\n",
1944                         card->index, skb, i);
1945                 if (skb != NULL) {
1946                         pci_unmap_single(card->pcidev,
1947                                          NS_PRV_DMA(skb),
1948                                          skb->len,
1949                                          PCI_DMA_TODEVICE);
1950                         vcc = ATM_SKB(skb)->vcc;
1951                         if (vcc && vcc->pop != NULL) {
1952                                 vcc->pop(vcc, skb);
1953                         } else {
1954                                 dev_kfree_skb_irq(skb);
1955                         }
1956                         scq->skb[i] = NULL;
1957                 }
1958                 if (++i == scq->num_entries)
1959                         i = 0;
1960         }
1961         scq->tail = scq->base + pos;
1962         spin_unlock_irqrestore(&scq->lock, flags);
1963 }
1964
1965 static void process_rsq(ns_dev * card)
1966 {
1967         ns_rsqe *previous;
1968
1969         if (!ns_rsqe_valid(card->rsq.next))
1970                 return;
1971         do {
1972                 dequeue_rx(card, card->rsq.next);
1973                 ns_rsqe_init(card->rsq.next);
1974                 previous = card->rsq.next;
1975                 if (card->rsq.next == card->rsq.last)
1976                         card->rsq.next = card->rsq.base;
1977                 else
1978                         card->rsq.next++;
1979         } while (ns_rsqe_valid(card->rsq.next));
1980         writel(PTR_DIFF(previous, card->rsq.base), card->membase + RSQH);
1981 }
1982
1983 static void dequeue_rx(ns_dev * card, ns_rsqe * rsqe)
1984 {
1985         u32 vpi, vci;
1986         vc_map *vc;
1987         struct sk_buff *iovb;
1988         struct iovec *iov;
1989         struct atm_vcc *vcc;
1990         struct sk_buff *skb;
1991         unsigned short aal5_len;
1992         int len;
1993         u32 stat;
1994         u32 id;
1995
1996         stat = readl(card->membase + STAT);
1997         card->sbfqc = ns_stat_sfbqc_get(stat);
1998         card->lbfqc = ns_stat_lfbqc_get(stat);
1999
2000         id = le32_to_cpu(rsqe->buffer_handle);
2001         skb = idr_find(&card->idr, id);
2002         if (!skb) {
2003                 RXPRINTK(KERN_ERR
2004                          "nicstar%d: idr_find() failed!\n", card->index);
2005                 return;
2006         }
2007         idr_remove(&card->idr, id);
2008         pci_dma_sync_single_for_cpu(card->pcidev,
2009                                     NS_PRV_DMA(skb),
2010                                     (NS_PRV_BUFTYPE(skb) == BUF_SM
2011                                      ? NS_SMSKBSIZE : NS_LGSKBSIZE),
2012                                     PCI_DMA_FROMDEVICE);
2013         pci_unmap_single(card->pcidev,
2014                          NS_PRV_DMA(skb),
2015                          (NS_PRV_BUFTYPE(skb) == BUF_SM
2016                           ? NS_SMSKBSIZE : NS_LGSKBSIZE),
2017                          PCI_DMA_FROMDEVICE);
2018         vpi = ns_rsqe_vpi(rsqe);
2019         vci = ns_rsqe_vci(rsqe);
2020         if (vpi >= 1UL << card->vpibits || vci >= 1UL << card->vcibits) {
2021                 printk("nicstar%d: SDU received for out-of-range vc %d.%d.\n",
2022                        card->index, vpi, vci);
2023                 recycle_rx_buf(card, skb);
2024                 return;
2025         }
2026
2027         vc = &(card->vcmap[vpi << card->vcibits | vci]);
2028         if (!vc->rx) {
2029                 RXPRINTK("nicstar%d: SDU received on non-rx vc %d.%d.\n",
2030                          card->index, vpi, vci);
2031                 recycle_rx_buf(card, skb);
2032                 return;
2033         }
2034
2035         vcc = vc->rx_vcc;
2036
2037         if (vcc->qos.aal == ATM_AAL0) {
2038                 struct sk_buff *sb;
2039                 unsigned char *cell;
2040                 int i;
2041
2042                 cell = skb->data;
2043                 for (i = ns_rsqe_cellcount(rsqe); i; i--) {
2044                         if ((sb = dev_alloc_skb(NS_SMSKBSIZE)) == NULL) {
2045                                 printk
2046                                     ("nicstar%d: Can't allocate buffers for aal0.\n",
2047                                      card->index);
2048                                 atomic_add(i, &vcc->stats->rx_drop);
2049                                 break;
2050                         }
2051                         if (!atm_charge(vcc, sb->truesize)) {
2052                                 RXPRINTK
2053                                     ("nicstar%d: atm_charge() dropped aal0 packets.\n",
2054                                      card->index);
2055                                 atomic_add(i - 1, &vcc->stats->rx_drop);        /* already increased by 1 */
2056                                 dev_kfree_skb_any(sb);
2057                                 break;
2058                         }
2059                         /* Rebuild the header */
2060                         *((u32 *) sb->data) = le32_to_cpu(rsqe->word_1) << 4 |
2061                             (ns_rsqe_clp(rsqe) ? 0x00000001 : 0x00000000);
2062                         if (i == 1 && ns_rsqe_eopdu(rsqe))
2063                                 *((u32 *) sb->data) |= 0x00000002;
2064                         skb_put(sb, NS_AAL0_HEADER);
2065                         memcpy(skb_tail_pointer(sb), cell, ATM_CELL_PAYLOAD);
2066                         skb_put(sb, ATM_CELL_PAYLOAD);
2067                         ATM_SKB(sb)->vcc = vcc;
2068                         __net_timestamp(sb);
2069                         vcc->push(vcc, sb);
2070                         atomic_inc(&vcc->stats->rx);
2071                         cell += ATM_CELL_PAYLOAD;
2072                 }
2073
2074                 recycle_rx_buf(card, skb);
2075                 return;
2076         }
2077
2078         /* To reach this point, the AAL layer can only be AAL5 */
2079
2080         if ((iovb = vc->rx_iov) == NULL) {
2081                 iovb = skb_dequeue(&(card->iovpool.queue));
2082                 if (iovb == NULL) {     /* No buffers in the queue */
2083                         iovb = alloc_skb(NS_IOVBUFSIZE, GFP_ATOMIC);
2084                         if (iovb == NULL) {
2085                                 printk("nicstar%d: Out of iovec buffers.\n",
2086                                        card->index);
2087                                 atomic_inc(&vcc->stats->rx_drop);
2088                                 recycle_rx_buf(card, skb);
2089                                 return;
2090                         }
2091                         NS_PRV_BUFTYPE(iovb) = BUF_NONE;
2092                 } else if (--card->iovpool.count < card->iovnr.min) {
2093                         struct sk_buff *new_iovb;
2094                         if ((new_iovb =
2095                              alloc_skb(NS_IOVBUFSIZE, GFP_ATOMIC)) != NULL) {
2096                                 NS_PRV_BUFTYPE(iovb) = BUF_NONE;
2097                                 skb_queue_tail(&card->iovpool.queue, new_iovb);
2098                                 card->iovpool.count++;
2099                         }
2100                 }
2101                 vc->rx_iov = iovb;
2102                 NS_PRV_IOVCNT(iovb) = 0;
2103                 iovb->len = 0;
2104                 iovb->data = iovb->head;
2105                 skb_reset_tail_pointer(iovb);
2106                 /* IMPORTANT: a pointer to the sk_buff containing the small or large
2107                    buffer is stored as iovec base, NOT a pointer to the
2108                    small or large buffer itself. */
2109         } else if (NS_PRV_IOVCNT(iovb) >= NS_MAX_IOVECS) {
2110                 printk("nicstar%d: received too big AAL5 SDU.\n", card->index);
2111                 atomic_inc(&vcc->stats->rx_err);
2112                 recycle_iovec_rx_bufs(card, (struct iovec *)iovb->data,
2113                                       NS_MAX_IOVECS);
2114                 NS_PRV_IOVCNT(iovb) = 0;
2115                 iovb->len = 0;
2116                 iovb->data = iovb->head;
2117                 skb_reset_tail_pointer(iovb);
2118         }
2119         iov = &((struct iovec *)iovb->data)[NS_PRV_IOVCNT(iovb)++];
2120         iov->iov_base = (void *)skb;
2121         iov->iov_len = ns_rsqe_cellcount(rsqe) * 48;
2122         iovb->len += iov->iov_len;
2123
2124 #ifdef EXTRA_DEBUG
2125         if (NS_PRV_IOVCNT(iovb) == 1) {
2126                 if (NS_PRV_BUFTYPE(skb) != BUF_SM) {
2127                         printk
2128                             ("nicstar%d: Expected a small buffer, and this is not one.\n",
2129                              card->index);
2130                         which_list(card, skb);
2131                         atomic_inc(&vcc->stats->rx_err);
2132                         recycle_rx_buf(card, skb);
2133                         vc->rx_iov = NULL;
2134                         recycle_iov_buf(card, iovb);
2135                         return;
2136                 }
2137         } else {                /* NS_PRV_IOVCNT(iovb) >= 2 */
2138
2139                 if (NS_PRV_BUFTYPE(skb) != BUF_LG) {
2140                         printk
2141                             ("nicstar%d: Expected a large buffer, and this is not one.\n",
2142                              card->index);
2143                         which_list(card, skb);
2144                         atomic_inc(&vcc->stats->rx_err);
2145                         recycle_iovec_rx_bufs(card, (struct iovec *)iovb->data,
2146                                               NS_PRV_IOVCNT(iovb));
2147                         vc->rx_iov = NULL;
2148                         recycle_iov_buf(card, iovb);
2149                         return;
2150                 }
2151         }
2152 #endif /* EXTRA_DEBUG */
2153
2154         if (ns_rsqe_eopdu(rsqe)) {
2155                 /* This works correctly regardless of the endianness of the host */
2156                 unsigned char *L1L2 = (unsigned char *)
2157                                                 (skb->data + iov->iov_len - 6);
2158                 aal5_len = L1L2[0] << 8 | L1L2[1];
2159                 len = (aal5_len == 0x0000) ? 0x10000 : aal5_len;
2160                 if (ns_rsqe_crcerr(rsqe) ||
2161                     len + 8 > iovb->len || len + (47 + 8) < iovb->len) {
2162                         printk("nicstar%d: AAL5 CRC error", card->index);
2163                         if (len + 8 > iovb->len || len + (47 + 8) < iovb->len)
2164                                 printk(" - PDU size mismatch.\n");
2165                         else
2166                                 printk(".\n");
2167                         atomic_inc(&vcc->stats->rx_err);
2168                         recycle_iovec_rx_bufs(card, (struct iovec *)iovb->data,
2169                                               NS_PRV_IOVCNT(iovb));
2170                         vc->rx_iov = NULL;
2171                         recycle_iov_buf(card, iovb);
2172                         return;
2173                 }
2174
2175                 /* By this point we (hopefully) have a complete SDU without errors. */
2176
2177                 if (NS_PRV_IOVCNT(iovb) == 1) { /* Just a small buffer */
2178                         /* skb points to a small buffer */
2179                         if (!atm_charge(vcc, skb->truesize)) {
2180                                 push_rxbufs(card, skb);
2181                                 atomic_inc(&vcc->stats->rx_drop);
2182                         } else {
2183                                 skb_put(skb, len);
2184                                 dequeue_sm_buf(card, skb);
2185 #ifdef NS_USE_DESTRUCTORS
2186                                 skb->destructor = ns_sb_destructor;
2187 #endif /* NS_USE_DESTRUCTORS */
2188                                 ATM_SKB(skb)->vcc = vcc;
2189                                 __net_timestamp(skb);
2190                                 vcc->push(vcc, skb);
2191                                 atomic_inc(&vcc->stats->rx);
2192                         }
2193                 } else if (NS_PRV_IOVCNT(iovb) == 2) {  /* One small plus one large buffer */
2194                         struct sk_buff *sb;
2195
2196                         sb = (struct sk_buff *)(iov - 1)->iov_base;
2197                         /* skb points to a large buffer */
2198
2199                         if (len <= NS_SMBUFSIZE) {
2200                                 if (!atm_charge(vcc, sb->truesize)) {
2201                                         push_rxbufs(card, sb);
2202                                         atomic_inc(&vcc->stats->rx_drop);
2203                                 } else {
2204                                         skb_put(sb, len);
2205                                         dequeue_sm_buf(card, sb);
2206 #ifdef NS_USE_DESTRUCTORS
2207                                         sb->destructor = ns_sb_destructor;
2208 #endif /* NS_USE_DESTRUCTORS */
2209                                         ATM_SKB(sb)->vcc = vcc;
2210                                         __net_timestamp(sb);
2211                                         vcc->push(vcc, sb);
2212                                         atomic_inc(&vcc->stats->rx);
2213                                 }
2214
2215                                 push_rxbufs(card, skb);
2216
2217                         } else {        /* len > NS_SMBUFSIZE, the usual case */
2218
2219                                 if (!atm_charge(vcc, skb->truesize)) {
2220                                         push_rxbufs(card, skb);
2221                                         atomic_inc(&vcc->stats->rx_drop);
2222                                 } else {
2223                                         dequeue_lg_buf(card, skb);
2224 #ifdef NS_USE_DESTRUCTORS
2225                                         skb->destructor = ns_lb_destructor;
2226 #endif /* NS_USE_DESTRUCTORS */
2227                                         skb_push(skb, NS_SMBUFSIZE);
2228                                         skb_copy_from_linear_data(sb, skb->data,
2229                                                                   NS_SMBUFSIZE);
2230                                         skb_put(skb, len - NS_SMBUFSIZE);
2231                                         ATM_SKB(skb)->vcc = vcc;
2232                                         __net_timestamp(skb);
2233                                         vcc->push(vcc, skb);
2234                                         atomic_inc(&vcc->stats->rx);
2235                                 }
2236
2237                                 push_rxbufs(card, sb);
2238
2239                         }
2240
2241                 } else {        /* Must push a huge buffer */
2242
2243                         struct sk_buff *hb, *sb, *lb;
2244                         int remaining, tocopy;
2245                         int j;
2246
2247                         hb = skb_dequeue(&(card->hbpool.queue));
2248                         if (hb == NULL) {       /* No buffers in the queue */
2249
2250                                 hb = dev_alloc_skb(NS_HBUFSIZE);
2251                                 if (hb == NULL) {
2252                                         printk
2253                                             ("nicstar%d: Out of huge buffers.\n",
2254                                              card->index);
2255                                         atomic_inc(&vcc->stats->rx_drop);
2256                                         recycle_iovec_rx_bufs(card,
2257                                                               (struct iovec *)
2258                                                               iovb->data,
2259                                                               NS_PRV_IOVCNT(iovb));
2260                                         vc->rx_iov = NULL;
2261                                         recycle_iov_buf(card, iovb);
2262                                         return;
2263                                 } else if (card->hbpool.count < card->hbnr.min) {
2264                                         struct sk_buff *new_hb;
2265                                         if ((new_hb =
2266                                              dev_alloc_skb(NS_HBUFSIZE)) !=
2267                                             NULL) {
2268                                                 skb_queue_tail(&card->hbpool.
2269                                                                queue, new_hb);
2270                                                 card->hbpool.count++;
2271                                         }
2272                                 }
2273                                 NS_PRV_BUFTYPE(hb) = BUF_NONE;
2274                         } else if (--card->hbpool.count < card->hbnr.min) {
2275                                 struct sk_buff *new_hb;
2276                                 if ((new_hb =
2277                                      dev_alloc_skb(NS_HBUFSIZE)) != NULL) {
2278                                         NS_PRV_BUFTYPE(new_hb) = BUF_NONE;
2279                                         skb_queue_tail(&card->hbpool.queue,
2280                                                        new_hb);
2281                                         card->hbpool.count++;
2282                                 }
2283                                 if (card->hbpool.count < card->hbnr.min) {
2284                                         if ((new_hb =
2285                                              dev_alloc_skb(NS_HBUFSIZE)) !=
2286                                             NULL) {
2287                                                 NS_PRV_BUFTYPE(new_hb) =
2288                                                     BUF_NONE;
2289                                                 skb_queue_tail(&card->hbpool.
2290                                                                queue, new_hb);
2291                                                 card->hbpool.count++;
2292                                         }
2293                                 }
2294                         }
2295
2296                         iov = (struct iovec *)iovb->data;
2297
2298                         if (!atm_charge(vcc, hb->truesize)) {
2299                                 recycle_iovec_rx_bufs(card, iov,
2300                                                       NS_PRV_IOVCNT(iovb));
2301                                 if (card->hbpool.count < card->hbnr.max) {
2302                                         skb_queue_tail(&card->hbpool.queue, hb);
2303                                         card->hbpool.count++;
2304                                 } else
2305                                         dev_kfree_skb_any(hb);
2306                                 atomic_inc(&vcc->stats->rx_drop);
2307                         } else {
2308                                 /* Copy the small buffer to the huge buffer */
2309                                 sb = (struct sk_buff *)iov->iov_base;
2310                                 skb_copy_from_linear_data(sb, hb->data,
2311                                                           iov->iov_len);
2312                                 skb_put(hb, iov->iov_len);
2313                                 remaining = len - iov->iov_len;
2314                                 iov++;
2315                                 /* Free the small buffer */
2316                                 push_rxbufs(card, sb);
2317
2318                                 /* Copy all large buffers to the huge buffer and free them */
2319                                 for (j = 1; j < NS_PRV_IOVCNT(iovb); j++) {
2320                                         lb = (struct sk_buff *)iov->iov_base;
2321                                         tocopy =
2322                                             min_t(int, remaining, iov->iov_len);
2323                                         skb_copy_from_linear_data(lb,
2324                                                                   skb_tail_pointer
2325                                                                   (hb), tocopy);
2326                                         skb_put(hb, tocopy);
2327                                         iov++;
2328                                         remaining -= tocopy;
2329                                         push_rxbufs(card, lb);
2330                                 }
2331 #ifdef EXTRA_DEBUG
2332                                 if (remaining != 0 || hb->len != len)
2333                                         printk
2334                                             ("nicstar%d: Huge buffer len mismatch.\n",
2335                                              card->index);
2336 #endif /* EXTRA_DEBUG */
2337                                 ATM_SKB(hb)->vcc = vcc;
2338 #ifdef NS_USE_DESTRUCTORS
2339                                 hb->destructor = ns_hb_destructor;
2340 #endif /* NS_USE_DESTRUCTORS */
2341                                 __net_timestamp(hb);
2342                                 vcc->push(vcc, hb);
2343                                 atomic_inc(&vcc->stats->rx);
2344                         }
2345                 }
2346
2347                 vc->rx_iov = NULL;
2348                 recycle_iov_buf(card, iovb);
2349         }
2350
2351 }
2352
2353 #ifdef NS_USE_DESTRUCTORS
2354
2355 static void ns_sb_destructor(struct sk_buff *sb)
2356 {
2357         ns_dev *card;
2358         u32 stat;
2359
2360         card = (ns_dev *) ATM_SKB(sb)->vcc->dev->dev_data;
2361         stat = readl(card->membase + STAT);
2362         card->sbfqc = ns_stat_sfbqc_get(stat);
2363         card->lbfqc = ns_stat_lfbqc_get(stat);
2364
2365         do {
2366                 sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
2367                 if (sb == NULL)
2368                         break;
2369                 NS_PRV_BUFTYPE(sb) = BUF_SM;
2370                 skb_queue_tail(&card->sbpool.queue, sb);
2371                 skb_reserve(sb, NS_AAL0_HEADER);
2372                 push_rxbufs(card, sb);
2373         } while (card->sbfqc < card->sbnr.min);
2374 }
2375
2376 static void ns_lb_destructor(struct sk_buff *lb)
2377 {
2378         ns_dev *card;
2379         u32 stat;
2380
2381         card = (ns_dev *) ATM_SKB(lb)->vcc->dev->dev_data;
2382         stat = readl(card->membase + STAT);
2383         card->sbfqc = ns_stat_sfbqc_get(stat);
2384         card->lbfqc = ns_stat_lfbqc_get(stat);
2385
2386         do {
2387                 lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
2388                 if (lb == NULL)
2389                         break;
2390                 NS_PRV_BUFTYPE(lb) = BUF_LG;
2391                 skb_queue_tail(&card->lbpool.queue, lb);
2392                 skb_reserve(lb, NS_SMBUFSIZE);
2393                 push_rxbufs(card, lb);
2394         } while (card->lbfqc < card->lbnr.min);
2395 }
2396
2397 static void ns_hb_destructor(struct sk_buff *hb)
2398 {
2399         ns_dev *card;
2400
2401         card = (ns_dev *) ATM_SKB(hb)->vcc->dev->dev_data;
2402
2403         while (card->hbpool.count < card->hbnr.init) {
2404                 hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
2405                 if (hb == NULL)
2406                         break;
2407                 NS_PRV_BUFTYPE(hb) = BUF_NONE;
2408                 skb_queue_tail(&card->hbpool.queue, hb);
2409                 card->hbpool.count++;
2410         }
2411 }
2412
2413 #endif /* NS_USE_DESTRUCTORS */
2414
2415 static void recycle_rx_buf(ns_dev * card, struct sk_buff *skb)
2416 {
2417         if (unlikely(NS_PRV_BUFTYPE(skb) == BUF_NONE)) {
2418                 printk("nicstar%d: What kind of rx buffer is this?\n",
2419                        card->index);
2420                 dev_kfree_skb_any(skb);
2421         } else
2422                 push_rxbufs(card, skb);
2423 }
2424
2425 static void recycle_iovec_rx_bufs(ns_dev * card, struct iovec *iov, int count)
2426 {
2427         while (count-- > 0)
2428                 recycle_rx_buf(card, (struct sk_buff *)(iov++)->iov_base);
2429 }
2430
2431 static void recycle_iov_buf(ns_dev * card, struct sk_buff *iovb)
2432 {
2433         if (card->iovpool.count < card->iovnr.max) {
2434                 skb_queue_tail(&card->iovpool.queue, iovb);
2435                 card->iovpool.count++;
2436         } else
2437                 dev_kfree_skb_any(iovb);
2438 }
2439
2440 static void dequeue_sm_buf(ns_dev * card, struct sk_buff *sb)
2441 {
2442         skb_unlink(sb, &card->sbpool.queue);
2443 #ifdef NS_USE_DESTRUCTORS
2444         if (card->sbfqc < card->sbnr.min)
2445 #else
2446         if (card->sbfqc < card->sbnr.init) {
2447                 struct sk_buff *new_sb;
2448                 if ((new_sb = dev_alloc_skb(NS_SMSKBSIZE)) != NULL) {
2449                         NS_PRV_BUFTYPE(new_sb) = BUF_SM;
2450                         skb_queue_tail(&card->sbpool.queue, new_sb);
2451                         skb_reserve(new_sb, NS_AAL0_HEADER);
2452                         push_rxbufs(card, new_sb);
2453                 }
2454         }
2455         if (card->sbfqc < card->sbnr.init)
2456 #endif /* NS_USE_DESTRUCTORS */
2457         {
2458                 struct sk_buff *new_sb;
2459                 if ((new_sb = dev_alloc_skb(NS_SMSKBSIZE)) != NULL) {
2460                         NS_PRV_BUFTYPE(new_sb) = BUF_SM;
2461                         skb_queue_tail(&card->sbpool.queue, new_sb);
2462                         skb_reserve(new_sb, NS_AAL0_HEADER);
2463                         push_rxbufs(card, new_sb);
2464                 }
2465         }
2466 }
2467
2468 static void dequeue_lg_buf(ns_dev * card, struct sk_buff *lb)
2469 {
2470         skb_unlink(lb, &card->lbpool.queue);
2471 #ifdef NS_USE_DESTRUCTORS
2472         if (card->lbfqc < card->lbnr.min)
2473 #else
2474         if (card->lbfqc < card->lbnr.init) {
2475                 struct sk_buff *new_lb;
2476                 if ((new_lb = dev_alloc_skb(NS_LGSKBSIZE)) != NULL) {
2477                         NS_PRV_BUFTYPE(new_lb) = BUF_LG;
2478                         skb_queue_tail(&card->lbpool.queue, new_lb);
2479                         skb_reserve(new_lb, NS_SMBUFSIZE);
2480                         push_rxbufs(card, new_lb);
2481                 }
2482         }
2483         if (card->lbfqc < card->lbnr.init)
2484 #endif /* NS_USE_DESTRUCTORS */
2485         {
2486                 struct sk_buff *new_lb;
2487                 if ((new_lb = dev_alloc_skb(NS_LGSKBSIZE)) != NULL) {
2488                         NS_PRV_BUFTYPE(new_lb) = BUF_LG;
2489                         skb_queue_tail(&card->lbpool.queue, new_lb);
2490                         skb_reserve(new_lb, NS_SMBUFSIZE);
2491                         push_rxbufs(card, new_lb);
2492                 }
2493         }
2494 }
2495
2496 static int ns_proc_read(struct atm_dev *dev, loff_t * pos, char *page)
2497 {
2498         u32 stat;
2499         ns_dev *card;
2500         int left;
2501
2502         left = (int)*pos;
2503         card = (ns_dev *) dev->dev_data;
2504         stat = readl(card->membase + STAT);
2505         if (!left--)
2506                 return sprintf(page, "Pool   count    min   init    max \n");
2507         if (!left--)
2508                 return sprintf(page, "Small  %5d  %5d  %5d  %5d \n",
2509                                ns_stat_sfbqc_get(stat), card->sbnr.min,
2510                                card->sbnr.init, card->sbnr.max);
2511         if (!left--)
2512                 return sprintf(page, "Large  %5d  %5d  %5d  %5d \n",
2513                                ns_stat_lfbqc_get(stat), card->lbnr.min,
2514                                card->lbnr.init, card->lbnr.max);
2515         if (!left--)
2516                 return sprintf(page, "Huge   %5d  %5d  %5d  %5d \n",
2517                                card->hbpool.count, card->hbnr.min,
2518                                card->hbnr.init, card->hbnr.max);
2519         if (!left--)
2520                 return sprintf(page, "Iovec  %5d  %5d  %5d  %5d \n",
2521                                card->iovpool.count, card->iovnr.min,
2522                                card->iovnr.init, card->iovnr.max);
2523         if (!left--) {
2524                 int retval;
2525                 retval =
2526                     sprintf(page, "Interrupt counter: %u \n", card->intcnt);
2527                 card->intcnt = 0;
2528                 return retval;
2529         }
2530 #if 0
2531         /* Dump 25.6 Mbps PHY registers */
2532         /* Now there's a 25.6 Mbps PHY driver this code isn't needed. I left it
2533            here just in case it's needed for debugging. */
2534         if (card->max_pcr == ATM_25_PCR && !left--) {
2535                 u32 phy_regs[4];
2536                 u32 i;
2537
2538                 for (i = 0; i < 4; i++) {
2539                         while (CMD_BUSY(card)) ;
2540                         writel(NS_CMD_READ_UTILITY | 0x00000200 | i,
2541                                card->membase + CMD);
2542                         while (CMD_BUSY(card)) ;
2543                         phy_regs[i] = readl(card->membase + DR0) & 0x000000FF;
2544                 }
2545
2546                 return sprintf(page, "PHY regs: 0x%02X 0x%02X 0x%02X 0x%02X \n",
2547                                phy_regs[0], phy_regs[1], phy_regs[2],
2548                                phy_regs[3]);
2549         }
2550 #endif /* 0 - Dump 25.6 Mbps PHY registers */
2551 #if 0
2552         /* Dump TST */
2553         if (left-- < NS_TST_NUM_ENTRIES) {
2554                 if (card->tste2vc[left + 1] == NULL)
2555                         return sprintf(page, "%5d - VBR/UBR \n", left + 1);
2556                 else
2557                         return sprintf(page, "%5d - %d %d \n", left + 1,
2558                                        card->tste2vc[left + 1]->tx_vcc->vpi,
2559                                        card->tste2vc[left + 1]->tx_vcc->vci);
2560         }
2561 #endif /* 0 */
2562         return 0;
2563 }
2564
2565 static int ns_ioctl(struct atm_dev *dev, unsigned int cmd, void __user * arg)
2566 {
2567         ns_dev *card;
2568         pool_levels pl;
2569         long btype;
2570         unsigned long flags;
2571
2572         card = dev->dev_data;
2573         switch (cmd) {
2574         case NS_GETPSTAT:
2575                 if (get_user
2576                     (pl.buftype, &((pool_levels __user *) arg)->buftype))
2577                         return -EFAULT;
2578                 switch (pl.buftype) {
2579                 case NS_BUFTYPE_SMALL:
2580                         pl.count =
2581                             ns_stat_sfbqc_get(readl(card->membase + STAT));
2582                         pl.level.min = card->sbnr.min;
2583                         pl.level.init = card->sbnr.init;
2584                         pl.level.max = card->sbnr.max;
2585                         break;
2586
2587                 case NS_BUFTYPE_LARGE:
2588                         pl.count =
2589                             ns_stat_lfbqc_get(readl(card->membase + STAT));
2590                         pl.level.min = card->lbnr.min;
2591                         pl.level.init = card->lbnr.init;
2592                         pl.level.max = card->lbnr.max;
2593                         break;
2594
2595                 case NS_BUFTYPE_HUGE:
2596                         pl.count = card->hbpool.count;
2597                         pl.level.min = card->hbnr.min;
2598                         pl.level.init = card->hbnr.init;
2599                         pl.level.max = card->hbnr.max;
2600                         break;
2601
2602                 case NS_BUFTYPE_IOVEC:
2603                         pl.count = card->iovpool.count;
2604                         pl.level.min = card->iovnr.min;
2605                         pl.level.init = card->iovnr.init;
2606                         pl.level.max = card->iovnr.max;
2607                         break;
2608
2609                 default:
2610                         return -ENOIOCTLCMD;
2611
2612                 }
2613                 if (!copy_to_user((pool_levels __user *) arg, &pl, sizeof(pl)))
2614                         return (sizeof(pl));
2615                 else
2616                         return -EFAULT;
2617
2618         case NS_SETBUFLEV:
2619                 if (!capable(CAP_NET_ADMIN))
2620                         return -EPERM;
2621                 if (copy_from_user(&pl, (pool_levels __user *) arg, sizeof(pl)))
2622                         return -EFAULT;
2623                 if (pl.level.min >= pl.level.init
2624                     || pl.level.init >= pl.level.max)
2625                         return -EINVAL;
2626                 if (pl.level.min == 0)
2627                         return -EINVAL;
2628                 switch (pl.buftype) {
2629                 case NS_BUFTYPE_SMALL:
2630                         if (pl.level.max > TOP_SB)
2631                                 return -EINVAL;
2632                         card->sbnr.min = pl.level.min;
2633                         card->sbnr.init = pl.level.init;
2634                         card->sbnr.max = pl.level.max;
2635                         break;
2636
2637                 case NS_BUFTYPE_LARGE:
2638                         if (pl.level.max > TOP_LB)
2639                                 return -EINVAL;
2640                         card->lbnr.min = pl.level.min;
2641                         card->lbnr.init = pl.level.init;
2642                         card->lbnr.max = pl.level.max;
2643                         break;
2644
2645                 case NS_BUFTYPE_HUGE:
2646                         if (pl.level.max > TOP_HB)
2647                                 return -EINVAL;
2648                         card->hbnr.min = pl.level.min;
2649                         card->hbnr.init = pl.level.init;
2650                         card->hbnr.max = pl.level.max;
2651                         break;
2652
2653                 case NS_BUFTYPE_IOVEC:
2654                         if (pl.level.max > TOP_IOVB)
2655                                 return -EINVAL;
2656                         card->iovnr.min = pl.level.min;
2657                         card->iovnr.init = pl.level.init;
2658                         card->iovnr.max = pl.level.max;
2659                         break;
2660
2661                 default:
2662                         return -EINVAL;
2663
2664                 }
2665                 return 0;
2666
2667         case NS_ADJBUFLEV:
2668                 if (!capable(CAP_NET_ADMIN))
2669                         return -EPERM;
2670                 btype = (long)arg;      /* a long is the same size as a pointer or bigger */
2671                 switch (btype) {
2672                 case NS_BUFTYPE_SMALL:
2673                         while (card->sbfqc < card->sbnr.init) {
2674                                 struct sk_buff *sb;
2675
2676                                 sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
2677                                 if (sb == NULL)
2678                                         return -ENOMEM;
2679                                 NS_PRV_BUFTYPE(sb) = BUF_SM;
2680                                 skb_queue_tail(&card->sbpool.queue, sb);
2681                                 skb_reserve(sb, NS_AAL0_HEADER);
2682                                 push_rxbufs(card, sb);
2683                         }
2684                         break;
2685
2686                 case NS_BUFTYPE_LARGE:
2687                         while (card->lbfqc < card->lbnr.init) {
2688                                 struct sk_buff *lb;
2689
2690                                 lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
2691                                 if (lb == NULL)
2692                                         return -ENOMEM;
2693                                 NS_PRV_BUFTYPE(lb) = BUF_LG;
2694                                 skb_queue_tail(&card->lbpool.queue, lb);
2695                                 skb_reserve(lb, NS_SMBUFSIZE);
2696                                 push_rxbufs(card, lb);
2697                         }
2698                         break;
2699
2700                 case NS_BUFTYPE_HUGE:
2701                         while (card->hbpool.count > card->hbnr.init) {
2702                                 struct sk_buff *hb;
2703
2704                                 spin_lock_irqsave(&card->int_lock, flags);
2705                                 hb = skb_dequeue(&card->hbpool.queue);
2706                                 card->hbpool.count--;
2707                                 spin_unlock_irqrestore(&card->int_lock, flags);
2708                                 if (hb == NULL)
2709                                         printk
2710                                             ("nicstar%d: huge buffer count inconsistent.\n",
2711                                              card->index);
2712                                 else
2713                                         dev_kfree_skb_any(hb);
2714
2715                         }
2716                         while (card->hbpool.count < card->hbnr.init) {
2717                                 struct sk_buff *hb;
2718
2719                                 hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
2720                                 if (hb == NULL)
2721                                         return -ENOMEM;
2722                                 NS_PRV_BUFTYPE(hb) = BUF_NONE;
2723                                 spin_lock_irqsave(&card->int_lock, flags);
2724                                 skb_queue_tail(&card->hbpool.queue, hb);
2725                                 card->hbpool.count++;
2726                                 spin_unlock_irqrestore(&card->int_lock, flags);
2727                         }
2728                         break;
2729
2730                 case NS_BUFTYPE_IOVEC:
2731                         while (card->iovpool.count > card->iovnr.init) {
2732                                 struct sk_buff *iovb;
2733
2734                                 spin_lock_irqsave(&card->int_lock, flags);
2735                                 iovb = skb_dequeue(&card->iovpool.queue);
2736                                 card->iovpool.count--;
2737                                 spin_unlock_irqrestore(&card->int_lock, flags);
2738                                 if (iovb == NULL)
2739                                         printk
2740                                             ("nicstar%d: iovec buffer count inconsistent.\n",
2741                                              card->index);
2742                                 else
2743                                         dev_kfree_skb_any(iovb);
2744
2745                         }
2746                         while (card->iovpool.count < card->iovnr.init) {
2747                                 struct sk_buff *iovb;
2748
2749                                 iovb = alloc_skb(NS_IOVBUFSIZE, GFP_KERNEL);
2750                                 if (iovb == NULL)
2751                                         return -ENOMEM;
2752                                 NS_PRV_BUFTYPE(iovb) = BUF_NONE;
2753                                 spin_lock_irqsave(&card->int_lock, flags);
2754                                 skb_queue_tail(&card->iovpool.queue, iovb);
2755                                 card->iovpool.count++;
2756                                 spin_unlock_irqrestore(&card->int_lock, flags);
2757                         }
2758                         break;
2759
2760                 default:
2761                         return -EINVAL;
2762
2763                 }
2764                 return 0;
2765
2766         default:
2767                 if (dev->phy && dev->phy->ioctl) {
2768                         return dev->phy->ioctl(dev, cmd, arg);
2769                 } else {
2770                         printk("nicstar%d: %s == NULL \n", card->index,
2771                                dev->phy ? "dev->phy->ioctl" : "dev->phy");
2772                         return -ENOIOCTLCMD;
2773                 }
2774         }
2775 }
2776
2777 #ifdef EXTRA_DEBUG
2778 static void which_list(ns_dev * card, struct sk_buff *skb)
2779 {
2780         printk("skb buf_type: 0x%08x\n", NS_PRV_BUFTYPE(skb));
2781 }
2782 #endif /* EXTRA_DEBUG */
2783
2784 static void ns_poll(unsigned long arg)
2785 {
2786         int i;
2787         ns_dev *card;
2788         unsigned long flags;
2789         u32 stat_r, stat_w;
2790
2791         PRINTK("nicstar: Entering ns_poll().\n");
2792         for (i = 0; i < num_cards; i++) {
2793                 card = cards[i];
2794                 if (spin_is_locked(&card->int_lock)) {
2795                         /* Probably it isn't worth spinning */
2796                         continue;
2797                 }
2798                 spin_lock_irqsave(&card->int_lock, flags);
2799
2800                 stat_w = 0;
2801                 stat_r = readl(card->membase + STAT);
2802                 if (stat_r & NS_STAT_TSIF)
2803                         stat_w |= NS_STAT_TSIF;
2804                 if (stat_r & NS_STAT_EOPDU)
2805                         stat_w |= NS_STAT_EOPDU;
2806
2807                 process_tsq(card);
2808                 process_rsq(card);
2809
2810                 writel(stat_w, card->membase + STAT);
2811                 spin_unlock_irqrestore(&card->int_lock, flags);
2812         }
2813         mod_timer(&ns_timer, jiffies + NS_POLL_PERIOD);
2814         PRINTK("nicstar: Leaving ns_poll().\n");
2815 }
2816
2817 static int ns_parse_mac(char *mac, unsigned char *esi)
2818 {
2819         int i, j;
2820         short byte1, byte0;
2821
2822         if (mac == NULL || esi == NULL)
2823                 return -1;
2824         j = 0;
2825         for (i = 0; i < 6; i++) {
2826                 if ((byte1 = hex_to_bin(mac[j++])) < 0)
2827                         return -1;
2828                 if ((byte0 = hex_to_bin(mac[j++])) < 0)
2829                         return -1;
2830                 esi[i] = (unsigned char)(byte1 * 16 + byte0);
2831                 if (i < 5) {
2832                         if (mac[j++] != ':')
2833                                 return -1;
2834                 }
2835         }
2836         return 0;
2837 }
2838
2839
2840 static void ns_phy_put(struct atm_dev *dev, unsigned char value,
2841                        unsigned long addr)
2842 {
2843         ns_dev *card;
2844         unsigned long flags;
2845
2846         card = dev->dev_data;
2847         spin_lock_irqsave(&card->res_lock, flags);
2848         while (CMD_BUSY(card)) ;
2849         writel((u32) value, card->membase + DR0);
2850         writel(NS_CMD_WRITE_UTILITY | 0x00000200 | (addr & 0x000000FF),
2851                card->membase + CMD);
2852         spin_unlock_irqrestore(&card->res_lock, flags);
2853 }
2854
2855 static unsigned char ns_phy_get(struct atm_dev *dev, unsigned long addr)
2856 {
2857         ns_dev *card;
2858         unsigned long flags;
2859         u32 data;
2860
2861         card = dev->dev_data;
2862         spin_lock_irqsave(&card->res_lock, flags);
2863         while (CMD_BUSY(card)) ;
2864         writel(NS_CMD_READ_UTILITY | 0x00000200 | (addr & 0x000000FF),
2865                card->membase + CMD);
2866         while (CMD_BUSY(card)) ;
2867         data = readl(card->membase + DR0) & 0x000000FF;
2868         spin_unlock_irqrestore(&card->res_lock, flags);
2869         return (unsigned char)data;
2870 }
2871
2872 module_init(nicstar_init);
2873 module_exit(nicstar_cleanup);