1 /******************************************************************************
5 * Device driver supporting CBR for IDT 77201/77211 "NICStAR" based cards.
7 * IMPORTANT: The included file nicstarmac.c was NOT WRITTEN BY ME.
8 * It was taken from the frle-0.22 device driver.
9 * As the file doesn't have a copyright notice, in the file
10 * nicstarmac.copyright I put the copyright notice from the
11 * frle-0.22 device driver.
12 * Some code is based on the nicstar driver by M. Welsh.
14 * Author: Rui Prior (rprior@inescn.pt)
15 * PowerPC support by Jay Talbott (jay_talbott@mcg.mot.com) April 1999
21 ******************************************************************************/
24 /**** IMPORTANT INFORMATION ***************************************************
26 * There are currently three types of spinlocks:
28 * 1 - Per card interrupt spinlock (to protect structures and such)
29 * 2 - Per SCQ scq spinlock
30 * 3 - Per card resource spinlock (to access registers, etc.)
32 * These must NEVER be grabbed in reverse order.
34 ******************************************************************************/
36 /* Header files ***************************************************************/
38 #include <linux/module.h>
39 #include <linux/config.h>
40 #include <linux/kernel.h>
41 #include <linux/skbuff.h>
42 #include <linux/atmdev.h>
43 #include <linux/atm.h>
44 #include <linux/pci.h>
45 #include <linux/types.h>
46 #include <linux/string.h>
47 #include <linux/delay.h>
48 #include <linux/init.h>
49 #include <linux/sched.h>
50 #include <linux/timer.h>
51 #include <linux/interrupt.h>
52 #include <linux/bitops.h>
54 #include <asm/uaccess.h>
55 #include <asm/atomic.h>
57 #ifdef CONFIG_ATM_NICSTAR_USE_SUNI
59 #endif /* CONFIG_ATM_NICSTAR_USE_SUNI */
60 #ifdef CONFIG_ATM_NICSTAR_USE_IDT77105
62 #endif /* CONFIG_ATM_NICSTAR_USE_IDT77105 */
64 #if BITS_PER_LONG != 32
65 # error FIXME: this driver requires a 32-bit platform
68 /* Additional code ************************************************************/
70 #include "nicstarmac.c"
73 /* Configurable parameters ****************************************************/
81 #undef NS_USE_DESTRUCTORS /* For now keep this undefined unless you know
82 you're going to use only raw ATM */
85 /* Do not touch these *********************************************************/
88 #define TXPRINTK(args...) printk(args)
90 #define TXPRINTK(args...)
94 #define RXPRINTK(args...) printk(args)
96 #define RXPRINTK(args...)
100 #define PRINTK(args...) printk(args)
102 #define PRINTK(args...)
103 #endif /* GENERAL_DEBUG */
106 #define XPRINTK(args...) printk(args)
108 #define XPRINTK(args...)
109 #endif /* EXTRA_DEBUG */
112 /* Macros *********************************************************************/
114 #define CMD_BUSY(card) (readl((card)->membase + STAT) & NS_STAT_CMDBZ)
116 #define NS_DELAY mdelay(1)
118 #define ALIGN_BUS_ADDR(addr, alignment) \
119 ((((u32) (addr)) + (((u32) (alignment)) - 1)) & ~(((u32) (alignment)) - 1))
120 #define ALIGN_ADDRESS(addr, alignment) \
121 bus_to_virt(ALIGN_BUS_ADDR(virt_to_bus(addr), alignment))
126 #define ATM_SKB(s) (&(s)->atm)
129 /* Spinlock debugging stuff */
130 #ifdef NS_DEBUG_SPINLOCKS /* See nicstar.h */
131 #define ns_grab_int_lock(card,flags) \
133 unsigned long nsdsf, nsdsf2; \
134 local_irq_save(flags); \
135 save_flags(nsdsf); cli();\
136 if (nsdsf & (1<<9)) printk ("nicstar.c: ints %sabled -> enabled.\n", \
137 (flags)&(1<<9)?"en":"dis"); \
138 if (spin_is_locked(&(card)->int_lock) && \
139 (card)->cpu_int == smp_processor_id()) { \
140 printk("nicstar.c: line %d (cpu %d) int_lock already locked at line %d (cpu %d)\n", \
141 __LINE__, smp_processor_id(), (card)->has_int_lock, \
143 printk("nicstar.c: ints were %sabled.\n", ((flags)&(1<<9)?"en":"dis")); \
145 if (spin_is_locked(&(card)->res_lock) && \
146 (card)->cpu_res == smp_processor_id()) { \
147 printk("nicstar.c: line %d (cpu %d) res_lock locked at line %d (cpu %d)(trying int)\n", \
148 __LINE__, smp_processor_id(), (card)->has_res_lock, \
150 printk("nicstar.c: ints were %sabled.\n", ((flags)&(1<<9)?"en":"dis")); \
152 spin_lock_irq(&(card)->int_lock); \
153 (card)->has_int_lock = __LINE__; \
154 (card)->cpu_int = smp_processor_id(); \
155 restore_flags(nsdsf); } while (0)
156 #define ns_grab_res_lock(card,flags) \
158 unsigned long nsdsf, nsdsf2; \
159 local_irq_save(flags); \
160 save_flags(nsdsf); cli();\
161 if (nsdsf & (1<<9)) printk ("nicstar.c: ints %sabled -> enabled.\n", \
162 (flags)&(1<<9)?"en":"dis"); \
163 if (spin_is_locked(&(card)->res_lock) && \
164 (card)->cpu_res == smp_processor_id()) { \
165 printk("nicstar.c: line %d (cpu %d) res_lock already locked at line %d (cpu %d)\n", \
166 __LINE__, smp_processor_id(), (card)->has_res_lock, \
168 printk("nicstar.c: ints were %sabled.\n", ((flags)&(1<<9)?"en":"dis")); \
170 spin_lock_irq(&(card)->res_lock); \
171 (card)->has_res_lock = __LINE__; \
172 (card)->cpu_res = smp_processor_id(); \
173 restore_flags(nsdsf); } while (0)
174 #define ns_grab_scq_lock(card,scq,flags) \
176 unsigned long nsdsf, nsdsf2; \
177 local_irq_save(flags); \
178 save_flags(nsdsf); cli();\
179 if (nsdsf & (1<<9)) printk ("nicstar.c: ints %sabled -> enabled.\n", \
180 (flags)&(1<<9)?"en":"dis"); \
181 if (spin_is_locked(&(scq)->lock) && \
182 (scq)->cpu_lock == smp_processor_id()) { \
183 printk("nicstar.c: line %d (cpu %d) this scq_lock already locked at line %d (cpu %d)\n", \
184 __LINE__, smp_processor_id(), (scq)->has_lock, \
186 printk("nicstar.c: ints were %sabled.\n", ((flags)&(1<<9)?"en":"dis")); \
188 if (spin_is_locked(&(card)->res_lock) && \
189 (card)->cpu_res == smp_processor_id()) { \
190 printk("nicstar.c: line %d (cpu %d) res_lock locked at line %d (cpu %d)(trying scq)\n", \
191 __LINE__, smp_processor_id(), (card)->has_res_lock, \
193 printk("nicstar.c: ints were %sabled.\n", ((flags)&(1<<9)?"en":"dis")); \
195 spin_lock_irq(&(scq)->lock); \
196 (scq)->has_lock = __LINE__; \
197 (scq)->cpu_lock = smp_processor_id(); \
198 restore_flags(nsdsf); } while (0)
199 #else /* !NS_DEBUG_SPINLOCKS */
200 #define ns_grab_int_lock(card,flags) \
201 spin_lock_irqsave(&(card)->int_lock,(flags))
202 #define ns_grab_res_lock(card,flags) \
203 spin_lock_irqsave(&(card)->res_lock,(flags))
204 #define ns_grab_scq_lock(card,scq,flags) \
205 spin_lock_irqsave(&(scq)->lock,flags)
206 #endif /* NS_DEBUG_SPINLOCKS */
209 /* Function declarations ******************************************************/
211 static u32 ns_read_sram(ns_dev *card, u32 sram_address);
212 static void ns_write_sram(ns_dev *card, u32 sram_address, u32 *value, int count);
213 static int __devinit ns_init_card(int i, struct pci_dev *pcidev);
214 static void __devinit ns_init_card_error(ns_dev *card, int error);
215 static scq_info *get_scq(int size, u32 scd);
216 static void free_scq(scq_info *scq, struct atm_vcc *vcc);
217 static void push_rxbufs(ns_dev *card, u32 type, u32 handle1, u32 addr1,
218 u32 handle2, u32 addr2);
219 static irqreturn_t ns_irq_handler(int irq, void *dev_id, struct pt_regs *regs);
220 static int ns_open(struct atm_vcc *vcc);
221 static void ns_close(struct atm_vcc *vcc);
222 static void fill_tst(ns_dev *card, int n, vc_map *vc);
223 static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb);
224 static int push_scqe(ns_dev *card, vc_map *vc, scq_info *scq, ns_scqe *tbd,
225 struct sk_buff *skb);
226 static void process_tsq(ns_dev *card);
227 static void drain_scq(ns_dev *card, scq_info *scq, int pos);
228 static void process_rsq(ns_dev *card);
229 static void dequeue_rx(ns_dev *card, ns_rsqe *rsqe);
230 #ifdef NS_USE_DESTRUCTORS
231 static void ns_sb_destructor(struct sk_buff *sb);
232 static void ns_lb_destructor(struct sk_buff *lb);
233 static void ns_hb_destructor(struct sk_buff *hb);
234 #endif /* NS_USE_DESTRUCTORS */
235 static void recycle_rx_buf(ns_dev *card, struct sk_buff *skb);
236 static void recycle_iovec_rx_bufs(ns_dev *card, struct iovec *iov, int count);
237 static void recycle_iov_buf(ns_dev *card, struct sk_buff *iovb);
238 static void dequeue_sm_buf(ns_dev *card, struct sk_buff *sb);
239 static void dequeue_lg_buf(ns_dev *card, struct sk_buff *lb);
240 static int ns_proc_read(struct atm_dev *dev, loff_t *pos, char *page);
241 static int ns_ioctl(struct atm_dev *dev, unsigned int cmd, void __user *arg);
242 static void which_list(ns_dev *card, struct sk_buff *skb);
243 static void ns_poll(unsigned long arg);
244 static int ns_parse_mac(char *mac, unsigned char *esi);
245 static short ns_h2i(char c);
246 static void ns_phy_put(struct atm_dev *dev, unsigned char value,
248 static unsigned char ns_phy_get(struct atm_dev *dev, unsigned long addr);
252 /* Global variables ***********************************************************/
254 static struct ns_dev *cards[NS_MAX_CARDS];
255 static unsigned num_cards;
256 static struct atmdev_ops atm_ops =
262 .phy_put = ns_phy_put,
263 .phy_get = ns_phy_get,
264 .proc_read = ns_proc_read,
265 .owner = THIS_MODULE,
267 static struct timer_list ns_timer;
268 static char *mac[NS_MAX_CARDS];
269 module_param_array(mac, charp, NULL, 0);
270 MODULE_LICENSE("GPL");
273 /* Functions*******************************************************************/
275 static int __devinit nicstar_init_one(struct pci_dev *pcidev,
276 const struct pci_device_id *ent)
278 static int index = -1;
284 error = ns_init_card(index, pcidev);
286 cards[index--] = NULL; /* don't increment index */
297 static void __devexit nicstar_remove_one(struct pci_dev *pcidev)
300 ns_dev *card = pci_get_drvdata(pcidev);
302 struct sk_buff *iovb;
308 if (cards[i] == NULL)
311 if (card->atmdev->phy && card->atmdev->phy->stop)
312 card->atmdev->phy->stop(card->atmdev);
314 /* Stop everything */
315 writel(0x00000000, card->membase + CFG);
317 /* De-register device */
318 atm_dev_deregister(card->atmdev);
320 /* Disable PCI device */
321 pci_disable_device(pcidev);
323 /* Free up resources */
325 PRINTK("nicstar%d: freeing %d huge buffers.\n", i, card->hbpool.count);
326 while ((hb = skb_dequeue(&card->hbpool.queue)) != NULL)
328 dev_kfree_skb_any(hb);
331 PRINTK("nicstar%d: %d huge buffers freed.\n", i, j);
333 PRINTK("nicstar%d: freeing %d iovec buffers.\n", i, card->iovpool.count);
334 while ((iovb = skb_dequeue(&card->iovpool.queue)) != NULL)
336 dev_kfree_skb_any(iovb);
339 PRINTK("nicstar%d: %d iovec buffers freed.\n", i, j);
340 while ((lb = skb_dequeue(&card->lbpool.queue)) != NULL)
341 dev_kfree_skb_any(lb);
342 while ((sb = skb_dequeue(&card->sbpool.queue)) != NULL)
343 dev_kfree_skb_any(sb);
344 free_scq(card->scq0, NULL);
345 for (j = 0; j < NS_FRSCD_NUM; j++)
347 if (card->scd2vc[j] != NULL)
348 free_scq(card->scd2vc[j]->scq, card->scd2vc[j]->tx_vcc);
350 kfree(card->rsq.org);
351 kfree(card->tsq.org);
352 free_irq(card->pcidev->irq, card);
353 iounmap(card->membase);
359 static struct pci_device_id nicstar_pci_tbl[] __devinitdata =
361 {PCI_VENDOR_ID_IDT, PCI_DEVICE_ID_IDT_IDT77201,
362 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
363 {0,} /* terminate list */
365 MODULE_DEVICE_TABLE(pci, nicstar_pci_tbl);
369 static struct pci_driver nicstar_driver = {
371 .id_table = nicstar_pci_tbl,
372 .probe = nicstar_init_one,
373 .remove = __devexit_p(nicstar_remove_one),
378 static int __init nicstar_init(void)
380 unsigned error = 0; /* Initialized to remove compile warning */
382 XPRINTK("nicstar: nicstar_init() called.\n");
384 error = pci_register_driver(&nicstar_driver);
386 TXPRINTK("nicstar: TX debug enabled.\n");
387 RXPRINTK("nicstar: RX debug enabled.\n");
388 PRINTK("nicstar: General debug enabled.\n");
390 printk("nicstar: using PHY loopback.\n");
391 #endif /* PHY_LOOPBACK */
392 XPRINTK("nicstar: nicstar_init() returned.\n");
395 init_timer(&ns_timer);
396 ns_timer.expires = jiffies + NS_POLL_PERIOD;
398 ns_timer.function = ns_poll;
399 add_timer(&ns_timer);
407 static void __exit nicstar_cleanup(void)
409 XPRINTK("nicstar: nicstar_cleanup() called.\n");
411 del_timer(&ns_timer);
413 pci_unregister_driver(&nicstar_driver);
415 XPRINTK("nicstar: nicstar_cleanup() returned.\n");
420 static u32 ns_read_sram(ns_dev *card, u32 sram_address)
425 sram_address &= 0x0007FFFC; /* address must be dword aligned */
426 sram_address |= 0x50000000; /* SRAM read command */
427 ns_grab_res_lock(card, flags);
428 while (CMD_BUSY(card));
429 writel(sram_address, card->membase + CMD);
430 while (CMD_BUSY(card));
431 data = readl(card->membase + DR0);
432 spin_unlock_irqrestore(&card->res_lock, flags);
438 static void ns_write_sram(ns_dev *card, u32 sram_address, u32 *value, int count)
442 count--; /* count range now is 0..3 instead of 1..4 */
444 c <<= 2; /* to use increments of 4 */
445 ns_grab_res_lock(card, flags);
446 while (CMD_BUSY(card));
447 for (i = 0; i <= c; i += 4)
448 writel(*(value++), card->membase + i);
449 /* Note: DR# registers are the first 4 dwords in nicstar's memspace,
450 so card->membase + DR0 == card->membase */
452 sram_address &= 0x0007FFFC;
453 sram_address |= (0x40000000 | count);
454 writel(sram_address, card->membase + CMD);
455 spin_unlock_irqrestore(&card->res_lock, flags);
459 static int __devinit ns_init_card(int i, struct pci_dev *pcidev)
462 struct ns_dev *card = NULL;
463 unsigned char pci_latency;
469 unsigned long membase;
473 if (pci_enable_device(pcidev))
475 printk("nicstar%d: can't enable PCI device\n", i);
477 ns_init_card_error(card, error);
481 if ((card = kmalloc(sizeof(ns_dev), GFP_KERNEL)) == NULL)
483 printk("nicstar%d: can't allocate memory for device structure.\n", i);
485 ns_init_card_error(card, error);
489 spin_lock_init(&card->int_lock);
490 spin_lock_init(&card->res_lock);
492 pci_set_drvdata(pcidev, card);
496 card->pcidev = pcidev;
497 membase = pci_resource_start(pcidev, 1);
498 card->membase = ioremap(membase, NS_IOREMAP_SIZE);
499 if (card->membase == 0)
501 printk("nicstar%d: can't ioremap() membase.\n",i);
503 ns_init_card_error(card, error);
506 PRINTK("nicstar%d: membase at 0x%x.\n", i, card->membase);
508 pci_set_master(pcidev);
510 if (pci_read_config_byte(pcidev, PCI_LATENCY_TIMER, &pci_latency) != 0)
512 printk("nicstar%d: can't read PCI latency timer.\n", i);
514 ns_init_card_error(card, error);
517 #ifdef NS_PCI_LATENCY
518 if (pci_latency < NS_PCI_LATENCY)
520 PRINTK("nicstar%d: setting PCI latency timer to %d.\n", i, NS_PCI_LATENCY);
521 for (j = 1; j < 4; j++)
523 if (pci_write_config_byte(pcidev, PCI_LATENCY_TIMER, NS_PCI_LATENCY) != 0)
528 printk("nicstar%d: can't set PCI latency timer to %d.\n", i, NS_PCI_LATENCY);
530 ns_init_card_error(card, error);
534 #endif /* NS_PCI_LATENCY */
536 /* Clear timer overflow */
537 data = readl(card->membase + STAT);
538 if (data & NS_STAT_TMROF)
539 writel(NS_STAT_TMROF, card->membase + STAT);
542 writel(NS_CFG_SWRST, card->membase + CFG);
544 writel(0x00000000, card->membase + CFG);
547 writel(0x00000008, card->membase + GP);
549 writel(0x00000001, card->membase + GP);
551 while (CMD_BUSY(card));
552 writel(NS_CMD_WRITE_UTILITY | 0x00000100, card->membase + CMD); /* Sync UTOPIA with SAR clock */
555 /* Detect PHY type */
556 while (CMD_BUSY(card));
557 writel(NS_CMD_READ_UTILITY | 0x00000200, card->membase + CMD);
558 while (CMD_BUSY(card));
559 data = readl(card->membase + DR0);
562 printk("nicstar%d: PHY seems to be 25 Mbps.\n", i);
563 card->max_pcr = ATM_25_PCR;
564 while(CMD_BUSY(card));
565 writel(0x00000008, card->membase + DR0);
566 writel(NS_CMD_WRITE_UTILITY | 0x00000200, card->membase + CMD);
567 /* Clear an eventual pending interrupt */
568 writel(NS_STAT_SFBQF, card->membase + STAT);
570 while(CMD_BUSY(card));
571 writel(0x00000022, card->membase + DR0);
572 writel(NS_CMD_WRITE_UTILITY | 0x00000202, card->membase + CMD);
573 #endif /* PHY_LOOPBACK */
577 printk("nicstar%d: PHY seems to be 155 Mbps.\n", i);
578 card->max_pcr = ATM_OC3_PCR;
580 while(CMD_BUSY(card));
581 writel(0x00000002, card->membase + DR0);
582 writel(NS_CMD_WRITE_UTILITY | 0x00000205, card->membase + CMD);
583 #endif /* PHY_LOOPBACK */
586 printk("nicstar%d: unknown PHY type (0x%08X).\n", i, data);
588 ns_init_card_error(card, error);
591 writel(0x00000000, card->membase + GP);
593 /* Determine SRAM size */
595 ns_write_sram(card, 0x1C003, &data, 1);
597 ns_write_sram(card, 0x14003, &data, 1);
598 if (ns_read_sram(card, 0x14003) == 0x89ABCDEF &&
599 ns_read_sram(card, 0x1C003) == 0x76543210)
600 card->sram_size = 128;
602 card->sram_size = 32;
603 PRINTK("nicstar%d: %dK x 32bit SRAM size.\n", i, card->sram_size);
605 card->rct_size = NS_MAX_RCTSIZE;
607 #if (NS_MAX_RCTSIZE == 4096)
608 if (card->sram_size == 128)
609 printk("nicstar%d: limiting maximum VCI. See NS_MAX_RCTSIZE in nicstar.h\n", i);
610 #elif (NS_MAX_RCTSIZE == 16384)
611 if (card->sram_size == 32)
613 printk("nicstar%d: wasting memory. See NS_MAX_RCTSIZE in nicstar.h\n", i);
614 card->rct_size = 4096;
617 #error NS_MAX_RCTSIZE must be either 4096 or 16384 in nicstar.c
620 card->vpibits = NS_VPIBITS;
621 if (card->rct_size == 4096)
622 card->vcibits = 12 - NS_VPIBITS;
623 else /* card->rct_size == 16384 */
624 card->vcibits = 14 - NS_VPIBITS;
626 /* Initialize the nicstar eeprom/eprom stuff, for the MAC addr */
628 nicstar_init_eprom(card->membase);
630 if (request_irq(pcidev->irq, &ns_irq_handler, SA_INTERRUPT | SA_SHIRQ, "nicstar", card) != 0)
632 printk("nicstar%d: can't allocate IRQ %d.\n", i, pcidev->irq);
634 ns_init_card_error(card, error);
638 /* Set the VPI/VCI MSb mask to zero so we can receive OAM cells */
639 writel(0x00000000, card->membase + VPM);
642 card->tsq.org = kmalloc(NS_TSQSIZE + NS_TSQ_ALIGNMENT, GFP_KERNEL);
643 if (card->tsq.org == NULL)
645 printk("nicstar%d: can't allocate TSQ.\n", i);
647 ns_init_card_error(card, error);
650 card->tsq.base = (ns_tsi *) ALIGN_ADDRESS(card->tsq.org, NS_TSQ_ALIGNMENT);
651 card->tsq.next = card->tsq.base;
652 card->tsq.last = card->tsq.base + (NS_TSQ_NUM_ENTRIES - 1);
653 for (j = 0; j < NS_TSQ_NUM_ENTRIES; j++)
654 ns_tsi_init(card->tsq.base + j);
655 writel(0x00000000, card->membase + TSQH);
656 writel((u32) virt_to_bus(card->tsq.base), card->membase + TSQB);
657 PRINTK("nicstar%d: TSQ base at 0x%x 0x%x 0x%x.\n", i, (u32) card->tsq.base,
658 (u32) virt_to_bus(card->tsq.base), readl(card->membase + TSQB));
661 card->rsq.org = kmalloc(NS_RSQSIZE + NS_RSQ_ALIGNMENT, GFP_KERNEL);
662 if (card->rsq.org == NULL)
664 printk("nicstar%d: can't allocate RSQ.\n", i);
666 ns_init_card_error(card, error);
669 card->rsq.base = (ns_rsqe *) ALIGN_ADDRESS(card->rsq.org, NS_RSQ_ALIGNMENT);
670 card->rsq.next = card->rsq.base;
671 card->rsq.last = card->rsq.base + (NS_RSQ_NUM_ENTRIES - 1);
672 for (j = 0; j < NS_RSQ_NUM_ENTRIES; j++)
673 ns_rsqe_init(card->rsq.base + j);
674 writel(0x00000000, card->membase + RSQH);
675 writel((u32) virt_to_bus(card->rsq.base), card->membase + RSQB);
676 PRINTK("nicstar%d: RSQ base at 0x%x.\n", i, (u32) card->rsq.base);
678 /* Initialize SCQ0, the only VBR SCQ used */
681 card->scq0 = get_scq(VBR_SCQSIZE, NS_VRSCD0);
682 if (card->scq0 == NULL)
684 printk("nicstar%d: can't get SCQ0.\n", i);
686 ns_init_card_error(card, error);
689 u32d[0] = (u32) virt_to_bus(card->scq0->base);
690 u32d[1] = (u32) 0x00000000;
691 u32d[2] = (u32) 0xffffffff;
692 u32d[3] = (u32) 0x00000000;
693 ns_write_sram(card, NS_VRSCD0, u32d, 4);
694 ns_write_sram(card, NS_VRSCD1, u32d, 4); /* These last two won't be used */
695 ns_write_sram(card, NS_VRSCD2, u32d, 4); /* but are initialized, just in case... */
696 card->scq0->scd = NS_VRSCD0;
697 PRINTK("nicstar%d: VBR-SCQ0 base at 0x%x.\n", i, (u32) card->scq0->base);
699 /* Initialize TSTs */
700 card->tst_addr = NS_TST0;
701 card->tst_free_entries = NS_TST_NUM_ENTRIES;
702 data = NS_TST_OPCODE_VARIABLE;
703 for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
704 ns_write_sram(card, NS_TST0 + j, &data, 1);
705 data = ns_tste_make(NS_TST_OPCODE_END, NS_TST0);
706 ns_write_sram(card, NS_TST0 + NS_TST_NUM_ENTRIES, &data, 1);
707 for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
708 ns_write_sram(card, NS_TST1 + j, &data, 1);
709 data = ns_tste_make(NS_TST_OPCODE_END, NS_TST1);
710 ns_write_sram(card, NS_TST1 + NS_TST_NUM_ENTRIES, &data, 1);
711 for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
712 card->tste2vc[j] = NULL;
713 writel(NS_TST0 << 2, card->membase + TSTB);
716 /* Initialize RCT. AAL type is set on opening the VC. */
718 u32d[0] = NS_RCTE_RAWCELLINTEN;
720 u32d[0] = 0x00000000;
721 #endif /* RCQ_SUPPORT */
722 u32d[1] = 0x00000000;
723 u32d[2] = 0x00000000;
724 u32d[3] = 0xFFFFFFFF;
725 for (j = 0; j < card->rct_size; j++)
726 ns_write_sram(card, j * 4, u32d, 4);
728 memset(card->vcmap, 0, NS_MAX_RCTSIZE * sizeof(vc_map));
730 for (j = 0; j < NS_FRSCD_NUM; j++)
731 card->scd2vc[j] = NULL;
733 /* Initialize buffer levels */
734 card->sbnr.min = MIN_SB;
735 card->sbnr.init = NUM_SB;
736 card->sbnr.max = MAX_SB;
737 card->lbnr.min = MIN_LB;
738 card->lbnr.init = NUM_LB;
739 card->lbnr.max = MAX_LB;
740 card->iovnr.min = MIN_IOVB;
741 card->iovnr.init = NUM_IOVB;
742 card->iovnr.max = MAX_IOVB;
743 card->hbnr.min = MIN_HB;
744 card->hbnr.init = NUM_HB;
745 card->hbnr.max = MAX_HB;
747 card->sm_handle = 0x00000000;
748 card->sm_addr = 0x00000000;
749 card->lg_handle = 0x00000000;
750 card->lg_addr = 0x00000000;
752 card->efbie = 1; /* To prevent push_rxbufs from enabling the interrupt */
754 /* Pre-allocate some huge buffers */
755 skb_queue_head_init(&card->hbpool.queue);
756 card->hbpool.count = 0;
757 for (j = 0; j < NUM_HB; j++)
760 hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
763 printk("nicstar%d: can't allocate %dth of %d huge buffers.\n",
766 ns_init_card_error(card, error);
769 skb_queue_tail(&card->hbpool.queue, hb);
770 card->hbpool.count++;
774 /* Allocate large buffers */
775 skb_queue_head_init(&card->lbpool.queue);
776 card->lbpool.count = 0; /* Not used */
777 for (j = 0; j < NUM_LB; j++)
780 lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
783 printk("nicstar%d: can't allocate %dth of %d large buffers.\n",
786 ns_init_card_error(card, error);
789 skb_queue_tail(&card->lbpool.queue, lb);
790 skb_reserve(lb, NS_SMBUFSIZE);
791 push_rxbufs(card, BUF_LG, (u32) lb, (u32) virt_to_bus(lb->data), 0, 0);
792 /* Due to the implementation of push_rxbufs() this is 1, not 0 */
796 card->rawch = (u32) virt_to_bus(lb->data);
799 /* Test for strange behaviour which leads to crashes */
800 if ((bcount = ns_stat_lfbqc_get(readl(card->membase + STAT))) < card->lbnr.min)
802 printk("nicstar%d: Strange... Just allocated %d large buffers and lfbqc = %d.\n",
805 ns_init_card_error(card, error);
810 /* Allocate small buffers */
811 skb_queue_head_init(&card->sbpool.queue);
812 card->sbpool.count = 0; /* Not used */
813 for (j = 0; j < NUM_SB; j++)
816 sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
819 printk("nicstar%d: can't allocate %dth of %d small buffers.\n",
822 ns_init_card_error(card, error);
825 skb_queue_tail(&card->sbpool.queue, sb);
826 skb_reserve(sb, NS_AAL0_HEADER);
827 push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data), 0, 0);
829 /* Test for strange behaviour which leads to crashes */
830 if ((bcount = ns_stat_sfbqc_get(readl(card->membase + STAT))) < card->sbnr.min)
832 printk("nicstar%d: Strange... Just allocated %d small buffers and sfbqc = %d.\n",
835 ns_init_card_error(card, error);
840 /* Allocate iovec buffers */
841 skb_queue_head_init(&card->iovpool.queue);
842 card->iovpool.count = 0;
843 for (j = 0; j < NUM_IOVB; j++)
845 struct sk_buff *iovb;
846 iovb = alloc_skb(NS_IOVBUFSIZE, GFP_KERNEL);
849 printk("nicstar%d: can't allocate %dth of %d iovec buffers.\n",
852 ns_init_card_error(card, error);
855 skb_queue_tail(&card->iovpool.queue, iovb);
856 card->iovpool.count++;
861 /* Configure NICStAR */
862 if (card->rct_size == 4096)
863 ns_cfg_rctsize = NS_CFG_RCTSIZE_4096_ENTRIES;
864 else /* (card->rct_size == 16384) */
865 ns_cfg_rctsize = NS_CFG_RCTSIZE_16384_ENTRIES;
869 /* Register device */
870 card->atmdev = atm_dev_register("nicstar", &atm_ops, -1, NULL);
871 if (card->atmdev == NULL)
873 printk("nicstar%d: can't register device.\n", i);
875 ns_init_card_error(card, error);
879 if (ns_parse_mac(mac[i], card->atmdev->esi)) {
880 nicstar_read_eprom(card->membase, NICSTAR_EPROM_MAC_ADDR_OFFSET,
881 card->atmdev->esi, 6);
882 if (memcmp(card->atmdev->esi, "\x00\x00\x00\x00\x00\x00", 6) == 0) {
883 nicstar_read_eprom(card->membase, NICSTAR_EPROM_MAC_ADDR_OFFSET_ALT,
884 card->atmdev->esi, 6);
888 printk("nicstar%d: MAC address %02X:%02X:%02X:%02X:%02X:%02X\n", i,
889 card->atmdev->esi[0], card->atmdev->esi[1], card->atmdev->esi[2],
890 card->atmdev->esi[3], card->atmdev->esi[4], card->atmdev->esi[5]);
892 card->atmdev->dev_data = card;
893 card->atmdev->ci_range.vpi_bits = card->vpibits;
894 card->atmdev->ci_range.vci_bits = card->vcibits;
895 card->atmdev->link_rate = card->max_pcr;
896 card->atmdev->phy = NULL;
898 #ifdef CONFIG_ATM_NICSTAR_USE_SUNI
899 if (card->max_pcr == ATM_OC3_PCR)
900 suni_init(card->atmdev);
901 #endif /* CONFIG_ATM_NICSTAR_USE_SUNI */
903 #ifdef CONFIG_ATM_NICSTAR_USE_IDT77105
904 if (card->max_pcr == ATM_25_PCR)
905 idt77105_init(card->atmdev);
906 #endif /* CONFIG_ATM_NICSTAR_USE_IDT77105 */
908 if (card->atmdev->phy && card->atmdev->phy->start)
909 card->atmdev->phy->start(card->atmdev);
911 writel(NS_CFG_RXPATH |
918 NS_CFG_RXINT_NODELAY |
919 NS_CFG_RAWIE | /* Only enabled if RCQ_SUPPORT */
923 NS_CFG_TSQFIE_OPT | /* Only enabled if ENABLE_TSQFIE */
925 card->membase + CFG);
934 static void __devinit ns_init_card_error(ns_dev *card, int error)
938 writel(0x00000000, card->membase + CFG);
942 struct sk_buff *iovb;
943 while ((iovb = skb_dequeue(&card->iovpool.queue)) != NULL)
944 dev_kfree_skb_any(iovb);
949 while ((sb = skb_dequeue(&card->sbpool.queue)) != NULL)
950 dev_kfree_skb_any(sb);
951 free_scq(card->scq0, NULL);
956 while ((lb = skb_dequeue(&card->lbpool.queue)) != NULL)
957 dev_kfree_skb_any(lb);
962 while ((hb = skb_dequeue(&card->hbpool.queue)) != NULL)
963 dev_kfree_skb_any(hb);
967 kfree(card->rsq.org);
971 kfree(card->tsq.org);
975 free_irq(card->pcidev->irq, card);
979 iounmap(card->membase);
983 pci_disable_device(card->pcidev);
990 static scq_info *get_scq(int size, u32 scd)
995 if (size != VBR_SCQSIZE && size != CBR_SCQSIZE)
998 scq = (scq_info *) kmalloc(sizeof(scq_info), GFP_KERNEL);
1001 scq->org = kmalloc(2 * size, GFP_KERNEL);
1002 if (scq->org == NULL)
1007 scq->skb = (struct sk_buff **) kmalloc(sizeof(struct sk_buff *) *
1008 (size / NS_SCQE_SIZE), GFP_KERNEL);
1009 if (scq->skb == NULL)
1015 scq->num_entries = size / NS_SCQE_SIZE;
1016 scq->base = (ns_scqe *) ALIGN_ADDRESS(scq->org, size);
1017 scq->next = scq->base;
1018 scq->last = scq->base + (scq->num_entries - 1);
1019 scq->tail = scq->last;
1021 scq->num_entries = size / NS_SCQE_SIZE;
1023 init_waitqueue_head(&scq->scqfull_waitq);
1025 spin_lock_init(&scq->lock);
1027 for (i = 0; i < scq->num_entries; i++)
1035 /* For variable rate SCQ vcc must be NULL */
1036 static void free_scq(scq_info *scq, struct atm_vcc *vcc)
1040 if (scq->num_entries == VBR_SCQ_NUM_ENTRIES)
1041 for (i = 0; i < scq->num_entries; i++)
1043 if (scq->skb[i] != NULL)
1045 vcc = ATM_SKB(scq->skb[i])->vcc;
1046 if (vcc->pop != NULL)
1047 vcc->pop(vcc, scq->skb[i]);
1049 dev_kfree_skb_any(scq->skb[i]);
1052 else /* vcc must be != NULL */
1056 printk("nicstar: free_scq() called with vcc == NULL for fixed rate scq.");
1057 for (i = 0; i < scq->num_entries; i++)
1058 dev_kfree_skb_any(scq->skb[i]);
1061 for (i = 0; i < scq->num_entries; i++)
1063 if (scq->skb[i] != NULL)
1065 if (vcc->pop != NULL)
1066 vcc->pop(vcc, scq->skb[i]);
1068 dev_kfree_skb_any(scq->skb[i]);
1079 /* The handles passed must be pointers to the sk_buff containing the small
1080 or large buffer(s) cast to u32. */
1081 static void push_rxbufs(ns_dev *card, u32 type, u32 handle1, u32 addr1,
1082 u32 handle2, u32 addr2)
1085 unsigned long flags;
1088 #ifdef GENERAL_DEBUG
1090 printk("nicstar%d: push_rxbufs called with addr1 = 0.\n", card->index);
1091 #endif /* GENERAL_DEBUG */
1093 stat = readl(card->membase + STAT);
1094 card->sbfqc = ns_stat_sfbqc_get(stat);
1095 card->lbfqc = ns_stat_lfbqc_get(stat);
1102 addr2 = card->sm_addr;
1103 handle2 = card->sm_handle;
1104 card->sm_addr = 0x00000000;
1105 card->sm_handle = 0x00000000;
1107 else /* (!sm_addr) */
1109 card->sm_addr = addr1;
1110 card->sm_handle = handle1;
1114 else /* type == BUF_LG */
1120 addr2 = card->lg_addr;
1121 handle2 = card->lg_handle;
1122 card->lg_addr = 0x00000000;
1123 card->lg_handle = 0x00000000;
1125 else /* (!lg_addr) */
1127 card->lg_addr = addr1;
1128 card->lg_handle = handle1;
1137 if (card->sbfqc >= card->sbnr.max)
1139 skb_unlink((struct sk_buff *) handle1);
1140 dev_kfree_skb_any((struct sk_buff *) handle1);
1141 skb_unlink((struct sk_buff *) handle2);
1142 dev_kfree_skb_any((struct sk_buff *) handle2);
1148 else /* (type == BUF_LG) */
1150 if (card->lbfqc >= card->lbnr.max)
1152 skb_unlink((struct sk_buff *) handle1);
1153 dev_kfree_skb_any((struct sk_buff *) handle1);
1154 skb_unlink((struct sk_buff *) handle2);
1155 dev_kfree_skb_any((struct sk_buff *) handle2);
1162 ns_grab_res_lock(card, flags);
1164 while (CMD_BUSY(card));
1165 writel(addr2, card->membase + DR3);
1166 writel(handle2, card->membase + DR2);
1167 writel(addr1, card->membase + DR1);
1168 writel(handle1, card->membase + DR0);
1169 writel(NS_CMD_WRITE_FREEBUFQ | (u32) type, card->membase + CMD);
1171 spin_unlock_irqrestore(&card->res_lock, flags);
1173 XPRINTK("nicstar%d: Pushing %s buffers at 0x%x and 0x%x.\n", card->index,
1174 (type == BUF_SM ? "small" : "large"), addr1, addr2);
1177 if (!card->efbie && card->sbfqc >= card->sbnr.min &&
1178 card->lbfqc >= card->lbnr.min)
1181 writel((readl(card->membase + CFG) | NS_CFG_EFBIE), card->membase + CFG);
1189 static irqreturn_t ns_irq_handler(int irq, void *dev_id, struct pt_regs *regs)
1193 struct atm_dev *dev;
1194 unsigned long flags;
1196 card = (ns_dev *) dev_id;
1200 PRINTK("nicstar%d: NICStAR generated an interrupt\n", card->index);
1202 ns_grab_int_lock(card, flags);
1204 stat_r = readl(card->membase + STAT);
1206 /* Transmit Status Indicator has been written to T. S. Queue */
1207 if (stat_r & NS_STAT_TSIF)
1209 TXPRINTK("nicstar%d: TSI interrupt\n", card->index);
1211 writel(NS_STAT_TSIF, card->membase + STAT);
1214 /* Incomplete CS-PDU has been transmitted */
1215 if (stat_r & NS_STAT_TXICP)
1217 writel(NS_STAT_TXICP, card->membase + STAT);
1218 TXPRINTK("nicstar%d: Incomplete CS-PDU transmitted.\n",
1222 /* Transmit Status Queue 7/8 full */
1223 if (stat_r & NS_STAT_TSQF)
1225 writel(NS_STAT_TSQF, card->membase + STAT);
1226 PRINTK("nicstar%d: TSQ full.\n", card->index);
1230 /* Timer overflow */
1231 if (stat_r & NS_STAT_TMROF)
1233 writel(NS_STAT_TMROF, card->membase + STAT);
1234 PRINTK("nicstar%d: Timer overflow.\n", card->index);
1237 /* PHY device interrupt signal active */
1238 if (stat_r & NS_STAT_PHYI)
1240 writel(NS_STAT_PHYI, card->membase + STAT);
1241 PRINTK("nicstar%d: PHY interrupt.\n", card->index);
1242 if (dev->phy && dev->phy->interrupt) {
1243 dev->phy->interrupt(dev);
1247 /* Small Buffer Queue is full */
1248 if (stat_r & NS_STAT_SFBQF)
1250 writel(NS_STAT_SFBQF, card->membase + STAT);
1251 printk("nicstar%d: Small free buffer queue is full.\n", card->index);
1254 /* Large Buffer Queue is full */
1255 if (stat_r & NS_STAT_LFBQF)
1257 writel(NS_STAT_LFBQF, card->membase + STAT);
1258 printk("nicstar%d: Large free buffer queue is full.\n", card->index);
1261 /* Receive Status Queue is full */
1262 if (stat_r & NS_STAT_RSQF)
1264 writel(NS_STAT_RSQF, card->membase + STAT);
1265 printk("nicstar%d: RSQ full.\n", card->index);
1269 /* Complete CS-PDU received */
1270 if (stat_r & NS_STAT_EOPDU)
1272 RXPRINTK("nicstar%d: End of CS-PDU received.\n", card->index);
1274 writel(NS_STAT_EOPDU, card->membase + STAT);
1277 /* Raw cell received */
1278 if (stat_r & NS_STAT_RAWCF)
1280 writel(NS_STAT_RAWCF, card->membase + STAT);
1282 printk("nicstar%d: Raw cell received and no support yet...\n",
1284 #endif /* RCQ_SUPPORT */
1285 /* NOTE: the following procedure may keep a raw cell pending until the
1286 next interrupt. As this preliminary support is only meant to
1287 avoid buffer leakage, this is not an issue. */
1288 while (readl(card->membase + RAWCT) != card->rawch)
1292 rawcell = (ns_rcqe *) bus_to_virt(card->rawch);
1293 if (ns_rcqe_islast(rawcell))
1295 struct sk_buff *oldbuf;
1297 oldbuf = card->rcbuf;
1298 card->rcbuf = (struct sk_buff *) ns_rcqe_nextbufhandle(rawcell);
1299 card->rawch = (u32) virt_to_bus(card->rcbuf->data);
1300 recycle_rx_buf(card, oldbuf);
1303 card->rawch += NS_RCQE_SIZE;
1307 /* Small buffer queue is empty */
1308 if (stat_r & NS_STAT_SFBQE)
1313 writel(NS_STAT_SFBQE, card->membase + STAT);
1314 printk("nicstar%d: Small free buffer queue empty.\n",
1316 for (i = 0; i < card->sbnr.min; i++)
1318 sb = dev_alloc_skb(NS_SMSKBSIZE);
1321 writel(readl(card->membase + CFG) & ~NS_CFG_EFBIE, card->membase + CFG);
1325 skb_queue_tail(&card->sbpool.queue, sb);
1326 skb_reserve(sb, NS_AAL0_HEADER);
1327 push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data), 0, 0);
1333 /* Large buffer queue empty */
1334 if (stat_r & NS_STAT_LFBQE)
1339 writel(NS_STAT_LFBQE, card->membase + STAT);
1340 printk("nicstar%d: Large free buffer queue empty.\n",
1342 for (i = 0; i < card->lbnr.min; i++)
1344 lb = dev_alloc_skb(NS_LGSKBSIZE);
1347 writel(readl(card->membase + CFG) & ~NS_CFG_EFBIE, card->membase + CFG);
1351 skb_queue_tail(&card->lbpool.queue, lb);
1352 skb_reserve(lb, NS_SMBUFSIZE);
1353 push_rxbufs(card, BUF_LG, (u32) lb, (u32) virt_to_bus(lb->data), 0, 0);
1359 /* Receive Status Queue is 7/8 full */
1360 if (stat_r & NS_STAT_RSQAF)
1362 writel(NS_STAT_RSQAF, card->membase + STAT);
1363 RXPRINTK("nicstar%d: RSQ almost full.\n", card->index);
1367 spin_unlock_irqrestore(&card->int_lock, flags);
1368 PRINTK("nicstar%d: end of interrupt service\n", card->index);
1374 static int ns_open(struct atm_vcc *vcc)
1378 unsigned long tmpl, modl;
1379 int tcr, tcra; /* target cell rate, and absolute value */
1380 int n = 0; /* Number of entries in the TST. Initialized to remove
1381 the compiler warning. */
1383 int frscdi = 0; /* Index of the SCD. Initialized to remove the compiler
1384 warning. How I wish compilers were clever enough to
1385 tell which variables can truly be used
1387 int inuse; /* tx or rx vc already in use by another vcc */
1388 short vpi = vcc->vpi;
1391 card = (ns_dev *) vcc->dev->dev_data;
1392 PRINTK("nicstar%d: opening vpi.vci %d.%d \n", card->index, (int) vpi, vci);
1393 if (vcc->qos.aal != ATM_AAL5 && vcc->qos.aal != ATM_AAL0)
1395 PRINTK("nicstar%d: unsupported AAL.\n", card->index);
1399 vc = &(card->vcmap[vpi << card->vcibits | vci]);
1403 if (vcc->qos.txtp.traffic_class != ATM_NONE && vc->tx)
1405 if (vcc->qos.rxtp.traffic_class != ATM_NONE && vc->rx)
1409 printk("nicstar%d: %s vci already in use.\n", card->index,
1410 inuse == 1 ? "tx" : inuse == 2 ? "rx" : "tx and rx");
1414 set_bit(ATM_VF_ADDR,&vcc->flags);
1416 /* NOTE: You are not allowed to modify an open connection's QOS. To change
1417 that, remove the ATM_VF_PARTIAL flag checking. There may be other changes
1418 needed to do that. */
1419 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
1423 set_bit(ATM_VF_PARTIAL,&vcc->flags);
1424 if (vcc->qos.txtp.traffic_class == ATM_CBR)
1426 /* Check requested cell rate and availability of SCD */
1427 if (vcc->qos.txtp.max_pcr == 0 && vcc->qos.txtp.pcr == 0 &&
1428 vcc->qos.txtp.min_pcr == 0)
1430 PRINTK("nicstar%d: trying to open a CBR vc with cell rate = 0 \n",
1432 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1433 clear_bit(ATM_VF_ADDR,&vcc->flags);
1437 tcr = atm_pcr_goal(&(vcc->qos.txtp));
1438 tcra = tcr >= 0 ? tcr : -tcr;
1440 PRINTK("nicstar%d: target cell rate = %d.\n", card->index,
1441 vcc->qos.txtp.max_pcr);
1443 tmpl = (unsigned long)tcra * (unsigned long)NS_TST_NUM_ENTRIES;
1444 modl = tmpl % card->max_pcr;
1446 n = (int)(tmpl / card->max_pcr);
1453 if ((n = (card->tst_free_entries - NS_TST_RESERVED)) <= 0)
1455 PRINTK("nicstar%d: no CBR bandwidth free.\n", card->index);
1456 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1457 clear_bit(ATM_VF_ADDR,&vcc->flags);
1464 printk("nicstar%d: selected bandwidth < granularity.\n", card->index);
1465 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1466 clear_bit(ATM_VF_ADDR,&vcc->flags);
1470 if (n > (card->tst_free_entries - NS_TST_RESERVED))
1472 PRINTK("nicstar%d: not enough free CBR bandwidth.\n", card->index);
1473 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1474 clear_bit(ATM_VF_ADDR,&vcc->flags);
1478 card->tst_free_entries -= n;
1480 XPRINTK("nicstar%d: writing %d tst entries.\n", card->index, n);
1481 for (frscdi = 0; frscdi < NS_FRSCD_NUM; frscdi++)
1483 if (card->scd2vc[frscdi] == NULL)
1485 card->scd2vc[frscdi] = vc;
1489 if (frscdi == NS_FRSCD_NUM)
1491 PRINTK("nicstar%d: no SCD available for CBR channel.\n", card->index);
1492 card->tst_free_entries += n;
1493 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1494 clear_bit(ATM_VF_ADDR,&vcc->flags);
1498 vc->cbr_scd = NS_FRSCD + frscdi * NS_FRSCD_SIZE;
1500 scq = get_scq(CBR_SCQSIZE, vc->cbr_scd);
1503 PRINTK("nicstar%d: can't get fixed rate SCQ.\n", card->index);
1504 card->scd2vc[frscdi] = NULL;
1505 card->tst_free_entries += n;
1506 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1507 clear_bit(ATM_VF_ADDR,&vcc->flags);
1511 u32d[0] = (u32) virt_to_bus(scq->base);
1512 u32d[1] = (u32) 0x00000000;
1513 u32d[2] = (u32) 0xffffffff;
1514 u32d[3] = (u32) 0x00000000;
1515 ns_write_sram(card, vc->cbr_scd, u32d, 4);
1517 fill_tst(card, n, vc);
1519 else if (vcc->qos.txtp.traffic_class == ATM_UBR)
1521 vc->cbr_scd = 0x00000000;
1522 vc->scq = card->scq0;
1525 if (vcc->qos.txtp.traffic_class != ATM_NONE)
1531 if (vcc->qos.rxtp.traffic_class != ATM_NONE)
1539 /* Open the connection in hardware */
1540 if (vcc->qos.aal == ATM_AAL5)
1541 status = NS_RCTE_AAL5 | NS_RCTE_CONNECTOPEN;
1542 else /* vcc->qos.aal == ATM_AAL0 */
1543 status = NS_RCTE_AAL0 | NS_RCTE_CONNECTOPEN;
1545 status |= NS_RCTE_RAWCELLINTEN;
1546 #endif /* RCQ_SUPPORT */
1547 ns_write_sram(card, NS_RCT + (vpi << card->vcibits | vci) *
1548 NS_RCT_ENTRY_SIZE, &status, 1);
1553 set_bit(ATM_VF_READY,&vcc->flags);
1559 static void ns_close(struct atm_vcc *vcc)
1567 card = vcc->dev->dev_data;
1568 PRINTK("nicstar%d: closing vpi.vci %d.%d \n", card->index,
1569 (int) vcc->vpi, vcc->vci);
1571 clear_bit(ATM_VF_READY,&vcc->flags);
1573 if (vcc->qos.rxtp.traffic_class != ATM_NONE)
1576 unsigned long flags;
1578 addr = NS_RCT + (vcc->vpi << card->vcibits | vcc->vci) * NS_RCT_ENTRY_SIZE;
1579 ns_grab_res_lock(card, flags);
1580 while(CMD_BUSY(card));
1581 writel(NS_CMD_CLOSE_CONNECTION | addr << 2, card->membase + CMD);
1582 spin_unlock_irqrestore(&card->res_lock, flags);
1585 if (vc->rx_iov != NULL)
1587 struct sk_buff *iovb;
1590 stat = readl(card->membase + STAT);
1591 card->sbfqc = ns_stat_sfbqc_get(stat);
1592 card->lbfqc = ns_stat_lfbqc_get(stat);
1594 PRINTK("nicstar%d: closing a VC with pending rx buffers.\n",
1597 recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data,
1598 NS_SKB(iovb)->iovcnt);
1599 NS_SKB(iovb)->iovcnt = 0;
1600 NS_SKB(iovb)->vcc = NULL;
1601 ns_grab_int_lock(card, flags);
1602 recycle_iov_buf(card, iovb);
1603 spin_unlock_irqrestore(&card->int_lock, flags);
1608 if (vcc->qos.txtp.traffic_class != ATM_NONE)
1613 if (vcc->qos.txtp.traffic_class == ATM_CBR)
1615 unsigned long flags;
1623 ns_grab_scq_lock(card, scq, flags);
1625 if (scqep == scq->base)
1629 if (scqep == scq->tail)
1631 spin_unlock_irqrestore(&scq->lock, flags);
1634 /* If the last entry is not a TSR, place one in the SCQ in order to
1635 be able to completely drain it and then close. */
1636 if (!ns_scqe_is_tsr(scqep) && scq->tail != scq->next)
1643 tsr.word_1 = ns_tsr_mkword_1(NS_TSR_INTENABLE);
1644 scdi = (vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE;
1645 scqi = scq->next - scq->base;
1646 tsr.word_2 = ns_tsr_mkword_2(scdi, scqi);
1647 tsr.word_3 = 0x00000000;
1648 tsr.word_4 = 0x00000000;
1651 scq->skb[index] = NULL;
1652 if (scq->next == scq->last)
1653 scq->next = scq->base;
1656 data = (u32) virt_to_bus(scq->next);
1657 ns_write_sram(card, scq->scd, &data, 1);
1659 spin_unlock_irqrestore(&scq->lock, flags);
1663 /* Free all TST entries */
1664 data = NS_TST_OPCODE_VARIABLE;
1665 for (i = 0; i < NS_TST_NUM_ENTRIES; i++)
1667 if (card->tste2vc[i] == vc)
1669 ns_write_sram(card, card->tst_addr + i, &data, 1);
1670 card->tste2vc[i] = NULL;
1671 card->tst_free_entries++;
1675 card->scd2vc[(vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE] = NULL;
1676 free_scq(vc->scq, vcc);
1679 /* remove all references to vcc before deleting it */
1680 if (vcc->qos.txtp.traffic_class != ATM_NONE)
1682 unsigned long flags;
1683 scq_info *scq = card->scq0;
1685 ns_grab_scq_lock(card, scq, flags);
1687 for(i = 0; i < scq->num_entries; i++) {
1688 if(scq->skb[i] && ATM_SKB(scq->skb[i])->vcc == vcc) {
1689 ATM_SKB(scq->skb[i])->vcc = NULL;
1690 atm_return(vcc, scq->skb[i]->truesize);
1691 PRINTK("nicstar: deleted pending vcc mapping\n");
1695 spin_unlock_irqrestore(&scq->lock, flags);
1698 vcc->dev_data = NULL;
1699 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1700 clear_bit(ATM_VF_ADDR,&vcc->flags);
1705 stat = readl(card->membase + STAT);
1706 cfg = readl(card->membase + CFG);
1707 printk("STAT = 0x%08X CFG = 0x%08X \n", stat, cfg);
1708 printk("TSQ: base = 0x%08X next = 0x%08X last = 0x%08X TSQT = 0x%08X \n",
1709 (u32) card->tsq.base, (u32) card->tsq.next,(u32) card->tsq.last,
1710 readl(card->membase + TSQT));
1711 printk("RSQ: base = 0x%08X next = 0x%08X last = 0x%08X RSQT = 0x%08X \n",
1712 (u32) card->rsq.base, (u32) card->rsq.next,(u32) card->rsq.last,
1713 readl(card->membase + RSQT));
1714 printk("Empty free buffer queue interrupt %s \n",
1715 card->efbie ? "enabled" : "disabled");
1716 printk("SBCNT = %d count = %d LBCNT = %d count = %d \n",
1717 ns_stat_sfbqc_get(stat), card->sbpool.count,
1718 ns_stat_lfbqc_get(stat), card->lbpool.count);
1719 printk("hbpool.count = %d iovpool.count = %d \n",
1720 card->hbpool.count, card->iovpool.count);
1722 #endif /* RX_DEBUG */
1727 static void fill_tst(ns_dev *card, int n, vc_map *vc)
1734 /* It would be very complicated to keep the two TSTs synchronized while
1735 assuring that writes are only made to the inactive TST. So, for now I
1736 will use only one TST. If problems occur, I will change this again */
1738 new_tst = card->tst_addr;
1740 /* Fill procedure */
1742 for (e = 0; e < NS_TST_NUM_ENTRIES; e++)
1744 if (card->tste2vc[e] == NULL)
1747 if (e == NS_TST_NUM_ENTRIES) {
1748 printk("nicstar%d: No free TST entries found. \n", card->index);
1753 cl = NS_TST_NUM_ENTRIES;
1754 data = ns_tste_make(NS_TST_OPCODE_FIXED, vc->cbr_scd);
1758 if (cl >= NS_TST_NUM_ENTRIES && card->tste2vc[e] == NULL)
1760 card->tste2vc[e] = vc;
1761 ns_write_sram(card, new_tst + e, &data, 1);
1762 cl -= NS_TST_NUM_ENTRIES;
1766 if (++e == NS_TST_NUM_ENTRIES) {
1772 /* End of fill procedure */
1774 data = ns_tste_make(NS_TST_OPCODE_END, new_tst);
1775 ns_write_sram(card, new_tst + NS_TST_NUM_ENTRIES, &data, 1);
1776 ns_write_sram(card, card->tst_addr + NS_TST_NUM_ENTRIES, &data, 1);
1777 card->tst_addr = new_tst;
1782 static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb)
1787 unsigned long buflen;
1789 u32 flags; /* TBD flags, not CPU flags */
1791 card = vcc->dev->dev_data;
1792 TXPRINTK("nicstar%d: ns_send() called.\n", card->index);
1793 if ((vc = (vc_map *) vcc->dev_data) == NULL)
1795 printk("nicstar%d: vcc->dev_data == NULL on ns_send().\n", card->index);
1796 atomic_inc(&vcc->stats->tx_err);
1797 dev_kfree_skb_any(skb);
1803 printk("nicstar%d: Trying to transmit on a non-tx VC.\n", card->index);
1804 atomic_inc(&vcc->stats->tx_err);
1805 dev_kfree_skb_any(skb);
1809 if (vcc->qos.aal != ATM_AAL5 && vcc->qos.aal != ATM_AAL0)
1811 printk("nicstar%d: Only AAL0 and AAL5 are supported.\n", card->index);
1812 atomic_inc(&vcc->stats->tx_err);
1813 dev_kfree_skb_any(skb);
1817 if (skb_shinfo(skb)->nr_frags != 0)
1819 printk("nicstar%d: No scatter-gather yet.\n", card->index);
1820 atomic_inc(&vcc->stats->tx_err);
1821 dev_kfree_skb_any(skb);
1825 ATM_SKB(skb)->vcc = vcc;
1827 if (vcc->qos.aal == ATM_AAL5)
1829 buflen = (skb->len + 47 + 8) / 48 * 48; /* Multiple of 48 */
1830 flags = NS_TBD_AAL5;
1831 scqe.word_2 = cpu_to_le32((u32) virt_to_bus(skb->data));
1832 scqe.word_3 = cpu_to_le32((u32) skb->len);
1833 scqe.word_4 = ns_tbd_mkword_4(0, (u32) vcc->vpi, (u32) vcc->vci, 0,
1834 ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? 1 : 0);
1835 flags |= NS_TBD_EOPDU;
1837 else /* (vcc->qos.aal == ATM_AAL0) */
1839 buflen = ATM_CELL_PAYLOAD; /* i.e., 48 bytes */
1840 flags = NS_TBD_AAL0;
1841 scqe.word_2 = cpu_to_le32((u32) virt_to_bus(skb->data) + NS_AAL0_HEADER);
1842 scqe.word_3 = cpu_to_le32(0x00000000);
1843 if (*skb->data & 0x02) /* Payload type 1 - end of pdu */
1844 flags |= NS_TBD_EOPDU;
1845 scqe.word_4 = cpu_to_le32(*((u32 *) skb->data) & ~NS_TBD_VC_MASK);
1846 /* Force the VPI/VCI to be the same as in VCC struct */
1847 scqe.word_4 |= cpu_to_le32((((u32) vcc->vpi) << NS_TBD_VPI_SHIFT |
1848 ((u32) vcc->vci) << NS_TBD_VCI_SHIFT) &
1852 if (vcc->qos.txtp.traffic_class == ATM_CBR)
1854 scqe.word_1 = ns_tbd_mkword_1_novbr(flags, (u32) buflen);
1855 scq = ((vc_map *) vcc->dev_data)->scq;
1859 scqe.word_1 = ns_tbd_mkword_1(flags, (u32) 1, (u32) 1, (u32) buflen);
1863 if (push_scqe(card, vc, scq, &scqe, skb) != 0)
1865 atomic_inc(&vcc->stats->tx_err);
1866 dev_kfree_skb_any(skb);
1869 atomic_inc(&vcc->stats->tx);
1876 static int push_scqe(ns_dev *card, vc_map *vc, scq_info *scq, ns_scqe *tbd,
1877 struct sk_buff *skb)
1879 unsigned long flags;
1886 ns_grab_scq_lock(card, scq, flags);
1887 while (scq->tail == scq->next)
1889 if (in_interrupt()) {
1890 spin_unlock_irqrestore(&scq->lock, flags);
1891 printk("nicstar%d: Error pushing TBD.\n", card->index);
1896 spin_unlock_irqrestore(&scq->lock, flags);
1897 interruptible_sleep_on_timeout(&scq->scqfull_waitq, SCQFULL_TIMEOUT);
1898 ns_grab_scq_lock(card, scq, flags);
1901 spin_unlock_irqrestore(&scq->lock, flags);
1902 printk("nicstar%d: Timeout pushing TBD.\n", card->index);
1907 index = (int) (scq->next - scq->base);
1908 scq->skb[index] = skb;
1909 XPRINTK("nicstar%d: sending skb at 0x%x (pos %d).\n",
1910 card->index, (u32) skb, index);
1911 XPRINTK("nicstar%d: TBD written:\n0x%x\n0x%x\n0x%x\n0x%x\n at 0x%x.\n",
1912 card->index, le32_to_cpu(tbd->word_1), le32_to_cpu(tbd->word_2),
1913 le32_to_cpu(tbd->word_3), le32_to_cpu(tbd->word_4),
1915 if (scq->next == scq->last)
1916 scq->next = scq->base;
1921 if (scq->num_entries == VBR_SCQ_NUM_ENTRIES)
1929 if (vc->tbd_count >= MAX_TBD_PER_VC || scq->tbd_count >= MAX_TBD_PER_SCQ)
1933 while (scq->tail == scq->next)
1935 if (in_interrupt()) {
1936 data = (u32) virt_to_bus(scq->next);
1937 ns_write_sram(card, scq->scd, &data, 1);
1938 spin_unlock_irqrestore(&scq->lock, flags);
1939 printk("nicstar%d: Error pushing TSR.\n", card->index);
1944 if (has_run++) break;
1945 spin_unlock_irqrestore(&scq->lock, flags);
1946 interruptible_sleep_on_timeout(&scq->scqfull_waitq, SCQFULL_TIMEOUT);
1947 ns_grab_scq_lock(card, scq, flags);
1952 tsr.word_1 = ns_tsr_mkword_1(NS_TSR_INTENABLE);
1954 scdi = NS_TSR_SCDISVBR;
1956 scdi = (vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE;
1957 scqi = scq->next - scq->base;
1958 tsr.word_2 = ns_tsr_mkword_2(scdi, scqi);
1959 tsr.word_3 = 0x00000000;
1960 tsr.word_4 = 0x00000000;
1964 scq->skb[index] = NULL;
1965 XPRINTK("nicstar%d: TSR written:\n0x%x\n0x%x\n0x%x\n0x%x\n at 0x%x.\n",
1966 card->index, le32_to_cpu(tsr.word_1), le32_to_cpu(tsr.word_2),
1967 le32_to_cpu(tsr.word_3), le32_to_cpu(tsr.word_4),
1969 if (scq->next == scq->last)
1970 scq->next = scq->base;
1977 PRINTK("nicstar%d: Timeout pushing TSR.\n", card->index);
1979 data = (u32) virt_to_bus(scq->next);
1980 ns_write_sram(card, scq->scd, &data, 1);
1982 spin_unlock_irqrestore(&scq->lock, flags);
1989 static void process_tsq(ns_dev *card)
1993 ns_tsi *previous = NULL, *one_ahead, *two_ahead;
1994 int serviced_entries; /* flag indicating at least on entry was serviced */
1996 serviced_entries = 0;
1998 if (card->tsq.next == card->tsq.last)
1999 one_ahead = card->tsq.base;
2001 one_ahead = card->tsq.next + 1;
2003 if (one_ahead == card->tsq.last)
2004 two_ahead = card->tsq.base;
2006 two_ahead = one_ahead + 1;
2008 while (!ns_tsi_isempty(card->tsq.next) || !ns_tsi_isempty(one_ahead) ||
2009 !ns_tsi_isempty(two_ahead))
2010 /* At most two empty, as stated in the 77201 errata */
2012 serviced_entries = 1;
2014 /* Skip the one or two possible empty entries */
2015 while (ns_tsi_isempty(card->tsq.next)) {
2016 if (card->tsq.next == card->tsq.last)
2017 card->tsq.next = card->tsq.base;
2022 if (!ns_tsi_tmrof(card->tsq.next))
2024 scdi = ns_tsi_getscdindex(card->tsq.next);
2025 if (scdi == NS_TSI_SCDISVBR)
2029 if (card->scd2vc[scdi] == NULL)
2031 printk("nicstar%d: could not find VC from SCD index.\n",
2033 ns_tsi_init(card->tsq.next);
2036 scq = card->scd2vc[scdi]->scq;
2038 drain_scq(card, scq, ns_tsi_getscqpos(card->tsq.next));
2040 wake_up_interruptible(&(scq->scqfull_waitq));
2043 ns_tsi_init(card->tsq.next);
2044 previous = card->tsq.next;
2045 if (card->tsq.next == card->tsq.last)
2046 card->tsq.next = card->tsq.base;
2050 if (card->tsq.next == card->tsq.last)
2051 one_ahead = card->tsq.base;
2053 one_ahead = card->tsq.next + 1;
2055 if (one_ahead == card->tsq.last)
2056 two_ahead = card->tsq.base;
2058 two_ahead = one_ahead + 1;
2061 if (serviced_entries) {
2062 writel((((u32) previous) - ((u32) card->tsq.base)),
2063 card->membase + TSQH);
2069 static void drain_scq(ns_dev *card, scq_info *scq, int pos)
2071 struct atm_vcc *vcc;
2072 struct sk_buff *skb;
2074 unsigned long flags;
2076 XPRINTK("nicstar%d: drain_scq() called, scq at 0x%x, pos %d.\n",
2077 card->index, (u32) scq, pos);
2078 if (pos >= scq->num_entries)
2080 printk("nicstar%d: Bad index on drain_scq().\n", card->index);
2084 ns_grab_scq_lock(card, scq, flags);
2085 i = (int) (scq->tail - scq->base);
2086 if (++i == scq->num_entries)
2091 XPRINTK("nicstar%d: freeing skb at 0x%x (index %d).\n",
2092 card->index, (u32) skb, i);
2095 vcc = ATM_SKB(skb)->vcc;
2096 if (vcc && vcc->pop != NULL) {
2099 dev_kfree_skb_irq(skb);
2103 if (++i == scq->num_entries)
2106 scq->tail = scq->base + pos;
2107 spin_unlock_irqrestore(&scq->lock, flags);
2112 static void process_rsq(ns_dev *card)
2116 if (!ns_rsqe_valid(card->rsq.next))
2118 while (ns_rsqe_valid(card->rsq.next))
2120 dequeue_rx(card, card->rsq.next);
2121 ns_rsqe_init(card->rsq.next);
2122 previous = card->rsq.next;
2123 if (card->rsq.next == card->rsq.last)
2124 card->rsq.next = card->rsq.base;
2128 writel((((u32) previous) - ((u32) card->rsq.base)),
2129 card->membase + RSQH);
2134 static void dequeue_rx(ns_dev *card, ns_rsqe *rsqe)
2138 struct sk_buff *iovb;
2140 struct atm_vcc *vcc;
2141 struct sk_buff *skb;
2142 unsigned short aal5_len;
2146 stat = readl(card->membase + STAT);
2147 card->sbfqc = ns_stat_sfbqc_get(stat);
2148 card->lbfqc = ns_stat_lfbqc_get(stat);
2150 skb = (struct sk_buff *) le32_to_cpu(rsqe->buffer_handle);
2151 vpi = ns_rsqe_vpi(rsqe);
2152 vci = ns_rsqe_vci(rsqe);
2153 if (vpi >= 1UL << card->vpibits || vci >= 1UL << card->vcibits)
2155 printk("nicstar%d: SDU received for out-of-range vc %d.%d.\n",
2156 card->index, vpi, vci);
2157 recycle_rx_buf(card, skb);
2161 vc = &(card->vcmap[vpi << card->vcibits | vci]);
2164 RXPRINTK("nicstar%d: SDU received on non-rx vc %d.%d.\n",
2165 card->index, vpi, vci);
2166 recycle_rx_buf(card, skb);
2172 if (vcc->qos.aal == ATM_AAL0)
2175 unsigned char *cell;
2179 for (i = ns_rsqe_cellcount(rsqe); i; i--)
2181 if ((sb = dev_alloc_skb(NS_SMSKBSIZE)) == NULL)
2183 printk("nicstar%d: Can't allocate buffers for aal0.\n",
2185 atomic_add(i,&vcc->stats->rx_drop);
2188 if (!atm_charge(vcc, sb->truesize))
2190 RXPRINTK("nicstar%d: atm_charge() dropped aal0 packets.\n",
2192 atomic_add(i-1,&vcc->stats->rx_drop); /* already increased by 1 */
2193 dev_kfree_skb_any(sb);
2196 /* Rebuild the header */
2197 *((u32 *) sb->data) = le32_to_cpu(rsqe->word_1) << 4 |
2198 (ns_rsqe_clp(rsqe) ? 0x00000001 : 0x00000000);
2199 if (i == 1 && ns_rsqe_eopdu(rsqe))
2200 *((u32 *) sb->data) |= 0x00000002;
2201 skb_put(sb, NS_AAL0_HEADER);
2202 memcpy(sb->tail, cell, ATM_CELL_PAYLOAD);
2203 skb_put(sb, ATM_CELL_PAYLOAD);
2204 ATM_SKB(sb)->vcc = vcc;
2205 do_gettimeofday(&sb->stamp);
2207 atomic_inc(&vcc->stats->rx);
2208 cell += ATM_CELL_PAYLOAD;
2211 recycle_rx_buf(card, skb);
2215 /* To reach this point, the AAL layer can only be AAL5 */
2217 if ((iovb = vc->rx_iov) == NULL)
2219 iovb = skb_dequeue(&(card->iovpool.queue));
2220 if (iovb == NULL) /* No buffers in the queue */
2222 iovb = alloc_skb(NS_IOVBUFSIZE, GFP_ATOMIC);
2225 printk("nicstar%d: Out of iovec buffers.\n", card->index);
2226 atomic_inc(&vcc->stats->rx_drop);
2227 recycle_rx_buf(card, skb);
2232 if (--card->iovpool.count < card->iovnr.min)
2234 struct sk_buff *new_iovb;
2235 if ((new_iovb = alloc_skb(NS_IOVBUFSIZE, GFP_ATOMIC)) != NULL)
2237 skb_queue_tail(&card->iovpool.queue, new_iovb);
2238 card->iovpool.count++;
2242 NS_SKB(iovb)->iovcnt = 0;
2244 iovb->tail = iovb->data = iovb->head;
2245 NS_SKB(iovb)->vcc = vcc;
2246 /* IMPORTANT: a pointer to the sk_buff containing the small or large
2247 buffer is stored as iovec base, NOT a pointer to the
2248 small or large buffer itself. */
2250 else if (NS_SKB(iovb)->iovcnt >= NS_MAX_IOVECS)
2252 printk("nicstar%d: received too big AAL5 SDU.\n", card->index);
2253 atomic_inc(&vcc->stats->rx_err);
2254 recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data, NS_MAX_IOVECS);
2255 NS_SKB(iovb)->iovcnt = 0;
2257 iovb->tail = iovb->data = iovb->head;
2258 NS_SKB(iovb)->vcc = vcc;
2260 iov = &((struct iovec *) iovb->data)[NS_SKB(iovb)->iovcnt++];
2261 iov->iov_base = (void *) skb;
2262 iov->iov_len = ns_rsqe_cellcount(rsqe) * 48;
2263 iovb->len += iov->iov_len;
2265 if (NS_SKB(iovb)->iovcnt == 1)
2267 if (skb->list != &card->sbpool.queue)
2269 printk("nicstar%d: Expected a small buffer, and this is not one.\n",
2271 which_list(card, skb);
2272 atomic_inc(&vcc->stats->rx_err);
2273 recycle_rx_buf(card, skb);
2275 recycle_iov_buf(card, iovb);
2279 else /* NS_SKB(iovb)->iovcnt >= 2 */
2281 if (skb->list != &card->lbpool.queue)
2283 printk("nicstar%d: Expected a large buffer, and this is not one.\n",
2285 which_list(card, skb);
2286 atomic_inc(&vcc->stats->rx_err);
2287 recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data,
2288 NS_SKB(iovb)->iovcnt);
2290 recycle_iov_buf(card, iovb);
2295 if (ns_rsqe_eopdu(rsqe))
2297 /* This works correctly regardless of the endianness of the host */
2298 unsigned char *L1L2 = (unsigned char *)((u32)skb->data +
2300 aal5_len = L1L2[0] << 8 | L1L2[1];
2301 len = (aal5_len == 0x0000) ? 0x10000 : aal5_len;
2302 if (ns_rsqe_crcerr(rsqe) ||
2303 len + 8 > iovb->len || len + (47 + 8) < iovb->len)
2305 printk("nicstar%d: AAL5 CRC error", card->index);
2306 if (len + 8 > iovb->len || len + (47 + 8) < iovb->len)
2307 printk(" - PDU size mismatch.\n");
2310 atomic_inc(&vcc->stats->rx_err);
2311 recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data,
2312 NS_SKB(iovb)->iovcnt);
2314 recycle_iov_buf(card, iovb);
2318 /* By this point we (hopefully) have a complete SDU without errors. */
2320 if (NS_SKB(iovb)->iovcnt == 1) /* Just a small buffer */
2322 /* skb points to a small buffer */
2323 if (!atm_charge(vcc, skb->truesize))
2325 push_rxbufs(card, BUF_SM, (u32) skb, (u32) virt_to_bus(skb->data),
2327 atomic_inc(&vcc->stats->rx_drop);
2332 dequeue_sm_buf(card, skb);
2333 #ifdef NS_USE_DESTRUCTORS
2334 skb->destructor = ns_sb_destructor;
2335 #endif /* NS_USE_DESTRUCTORS */
2336 ATM_SKB(skb)->vcc = vcc;
2337 do_gettimeofday(&skb->stamp);
2338 vcc->push(vcc, skb);
2339 atomic_inc(&vcc->stats->rx);
2342 else if (NS_SKB(iovb)->iovcnt == 2) /* One small plus one large buffer */
2346 sb = (struct sk_buff *) (iov - 1)->iov_base;
2347 /* skb points to a large buffer */
2349 if (len <= NS_SMBUFSIZE)
2351 if (!atm_charge(vcc, sb->truesize))
2353 push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data),
2355 atomic_inc(&vcc->stats->rx_drop);
2360 dequeue_sm_buf(card, sb);
2361 #ifdef NS_USE_DESTRUCTORS
2362 sb->destructor = ns_sb_destructor;
2363 #endif /* NS_USE_DESTRUCTORS */
2364 ATM_SKB(sb)->vcc = vcc;
2365 do_gettimeofday(&sb->stamp);
2367 atomic_inc(&vcc->stats->rx);
2370 push_rxbufs(card, BUF_LG, (u32) skb,
2371 (u32) virt_to_bus(skb->data), 0, 0);
2374 else /* len > NS_SMBUFSIZE, the usual case */
2376 if (!atm_charge(vcc, skb->truesize))
2378 push_rxbufs(card, BUF_LG, (u32) skb,
2379 (u32) virt_to_bus(skb->data), 0, 0);
2380 atomic_inc(&vcc->stats->rx_drop);
2384 dequeue_lg_buf(card, skb);
2385 #ifdef NS_USE_DESTRUCTORS
2386 skb->destructor = ns_lb_destructor;
2387 #endif /* NS_USE_DESTRUCTORS */
2388 skb_push(skb, NS_SMBUFSIZE);
2389 memcpy(skb->data, sb->data, NS_SMBUFSIZE);
2390 skb_put(skb, len - NS_SMBUFSIZE);
2391 ATM_SKB(skb)->vcc = vcc;
2392 do_gettimeofday(&skb->stamp);
2393 vcc->push(vcc, skb);
2394 atomic_inc(&vcc->stats->rx);
2397 push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data),
2403 else /* Must push a huge buffer */
2405 struct sk_buff *hb, *sb, *lb;
2406 int remaining, tocopy;
2409 hb = skb_dequeue(&(card->hbpool.queue));
2410 if (hb == NULL) /* No buffers in the queue */
2413 hb = dev_alloc_skb(NS_HBUFSIZE);
2416 printk("nicstar%d: Out of huge buffers.\n", card->index);
2417 atomic_inc(&vcc->stats->rx_drop);
2418 recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data,
2419 NS_SKB(iovb)->iovcnt);
2421 recycle_iov_buf(card, iovb);
2424 else if (card->hbpool.count < card->hbnr.min)
2426 struct sk_buff *new_hb;
2427 if ((new_hb = dev_alloc_skb(NS_HBUFSIZE)) != NULL)
2429 skb_queue_tail(&card->hbpool.queue, new_hb);
2430 card->hbpool.count++;
2435 if (--card->hbpool.count < card->hbnr.min)
2437 struct sk_buff *new_hb;
2438 if ((new_hb = dev_alloc_skb(NS_HBUFSIZE)) != NULL)
2440 skb_queue_tail(&card->hbpool.queue, new_hb);
2441 card->hbpool.count++;
2443 if (card->hbpool.count < card->hbnr.min)
2445 if ((new_hb = dev_alloc_skb(NS_HBUFSIZE)) != NULL)
2447 skb_queue_tail(&card->hbpool.queue, new_hb);
2448 card->hbpool.count++;
2453 iov = (struct iovec *) iovb->data;
2455 if (!atm_charge(vcc, hb->truesize))
2457 recycle_iovec_rx_bufs(card, iov, NS_SKB(iovb)->iovcnt);
2458 if (card->hbpool.count < card->hbnr.max)
2460 skb_queue_tail(&card->hbpool.queue, hb);
2461 card->hbpool.count++;
2464 dev_kfree_skb_any(hb);
2465 atomic_inc(&vcc->stats->rx_drop);
2469 /* Copy the small buffer to the huge buffer */
2470 sb = (struct sk_buff *) iov->iov_base;
2471 memcpy(hb->data, sb->data, iov->iov_len);
2472 skb_put(hb, iov->iov_len);
2473 remaining = len - iov->iov_len;
2475 /* Free the small buffer */
2476 push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data),
2479 /* Copy all large buffers to the huge buffer and free them */
2480 for (j = 1; j < NS_SKB(iovb)->iovcnt; j++)
2482 lb = (struct sk_buff *) iov->iov_base;
2483 tocopy = min_t(int, remaining, iov->iov_len);
2484 memcpy(hb->tail, lb->data, tocopy);
2485 skb_put(hb, tocopy);
2487 remaining -= tocopy;
2488 push_rxbufs(card, BUF_LG, (u32) lb,
2489 (u32) virt_to_bus(lb->data), 0, 0);
2492 if (remaining != 0 || hb->len != len)
2493 printk("nicstar%d: Huge buffer len mismatch.\n", card->index);
2494 #endif /* EXTRA_DEBUG */
2495 ATM_SKB(hb)->vcc = vcc;
2496 #ifdef NS_USE_DESTRUCTORS
2497 hb->destructor = ns_hb_destructor;
2498 #endif /* NS_USE_DESTRUCTORS */
2499 do_gettimeofday(&hb->stamp);
2501 atomic_inc(&vcc->stats->rx);
2506 recycle_iov_buf(card, iovb);
2513 #ifdef NS_USE_DESTRUCTORS
2515 static void ns_sb_destructor(struct sk_buff *sb)
2520 card = (ns_dev *) ATM_SKB(sb)->vcc->dev->dev_data;
2521 stat = readl(card->membase + STAT);
2522 card->sbfqc = ns_stat_sfbqc_get(stat);
2523 card->lbfqc = ns_stat_lfbqc_get(stat);
2527 sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
2530 skb_queue_tail(&card->sbpool.queue, sb);
2531 skb_reserve(sb, NS_AAL0_HEADER);
2532 push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data), 0, 0);
2533 } while (card->sbfqc < card->sbnr.min);
2538 static void ns_lb_destructor(struct sk_buff *lb)
2543 card = (ns_dev *) ATM_SKB(lb)->vcc->dev->dev_data;
2544 stat = readl(card->membase + STAT);
2545 card->sbfqc = ns_stat_sfbqc_get(stat);
2546 card->lbfqc = ns_stat_lfbqc_get(stat);
2550 lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
2553 skb_queue_tail(&card->lbpool.queue, lb);
2554 skb_reserve(lb, NS_SMBUFSIZE);
2555 push_rxbufs(card, BUF_LG, (u32) lb, (u32) virt_to_bus(lb->data), 0, 0);
2556 } while (card->lbfqc < card->lbnr.min);
2561 static void ns_hb_destructor(struct sk_buff *hb)
2565 card = (ns_dev *) ATM_SKB(hb)->vcc->dev->dev_data;
2567 while (card->hbpool.count < card->hbnr.init)
2569 hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
2572 skb_queue_tail(&card->hbpool.queue, hb);
2573 card->hbpool.count++;
2577 #endif /* NS_USE_DESTRUCTORS */
2581 static void recycle_rx_buf(ns_dev *card, struct sk_buff *skb)
2583 if (skb->list == &card->sbpool.queue)
2584 push_rxbufs(card, BUF_SM, (u32) skb, (u32) virt_to_bus(skb->data), 0, 0);
2585 else if (skb->list == &card->lbpool.queue)
2586 push_rxbufs(card, BUF_LG, (u32) skb, (u32) virt_to_bus(skb->data), 0, 0);
2589 printk("nicstar%d: What kind of rx buffer is this?\n", card->index);
2590 dev_kfree_skb_any(skb);
2596 static void recycle_iovec_rx_bufs(ns_dev *card, struct iovec *iov, int count)
2598 struct sk_buff *skb;
2600 for (; count > 0; count--)
2602 skb = (struct sk_buff *) (iov++)->iov_base;
2603 if (skb->list == &card->sbpool.queue)
2604 push_rxbufs(card, BUF_SM, (u32) skb, (u32) virt_to_bus(skb->data),
2606 else if (skb->list == &card->lbpool.queue)
2607 push_rxbufs(card, BUF_LG, (u32) skb, (u32) virt_to_bus(skb->data),
2611 printk("nicstar%d: What kind of rx buffer is this?\n", card->index);
2612 dev_kfree_skb_any(skb);
2619 static void recycle_iov_buf(ns_dev *card, struct sk_buff *iovb)
2621 if (card->iovpool.count < card->iovnr.max)
2623 skb_queue_tail(&card->iovpool.queue, iovb);
2624 card->iovpool.count++;
2627 dev_kfree_skb_any(iovb);
2632 static void dequeue_sm_buf(ns_dev *card, struct sk_buff *sb)
2635 #ifdef NS_USE_DESTRUCTORS
2636 if (card->sbfqc < card->sbnr.min)
2638 if (card->sbfqc < card->sbnr.init)
2640 struct sk_buff *new_sb;
2641 if ((new_sb = dev_alloc_skb(NS_SMSKBSIZE)) != NULL)
2643 skb_queue_tail(&card->sbpool.queue, new_sb);
2644 skb_reserve(new_sb, NS_AAL0_HEADER);
2645 push_rxbufs(card, BUF_SM, (u32) new_sb,
2646 (u32) virt_to_bus(new_sb->data), 0, 0);
2649 if (card->sbfqc < card->sbnr.init)
2650 #endif /* NS_USE_DESTRUCTORS */
2652 struct sk_buff *new_sb;
2653 if ((new_sb = dev_alloc_skb(NS_SMSKBSIZE)) != NULL)
2655 skb_queue_tail(&card->sbpool.queue, new_sb);
2656 skb_reserve(new_sb, NS_AAL0_HEADER);
2657 push_rxbufs(card, BUF_SM, (u32) new_sb,
2658 (u32) virt_to_bus(new_sb->data), 0, 0);
2665 static void dequeue_lg_buf(ns_dev *card, struct sk_buff *lb)
2668 #ifdef NS_USE_DESTRUCTORS
2669 if (card->lbfqc < card->lbnr.min)
2671 if (card->lbfqc < card->lbnr.init)
2673 struct sk_buff *new_lb;
2674 if ((new_lb = dev_alloc_skb(NS_LGSKBSIZE)) != NULL)
2676 skb_queue_tail(&card->lbpool.queue, new_lb);
2677 skb_reserve(new_lb, NS_SMBUFSIZE);
2678 push_rxbufs(card, BUF_LG, (u32) new_lb,
2679 (u32) virt_to_bus(new_lb->data), 0, 0);
2682 if (card->lbfqc < card->lbnr.init)
2683 #endif /* NS_USE_DESTRUCTORS */
2685 struct sk_buff *new_lb;
2686 if ((new_lb = dev_alloc_skb(NS_LGSKBSIZE)) != NULL)
2688 skb_queue_tail(&card->lbpool.queue, new_lb);
2689 skb_reserve(new_lb, NS_SMBUFSIZE);
2690 push_rxbufs(card, BUF_LG, (u32) new_lb,
2691 (u32) virt_to_bus(new_lb->data), 0, 0);
2698 static int ns_proc_read(struct atm_dev *dev, loff_t *pos, char *page)
2705 card = (ns_dev *) dev->dev_data;
2706 stat = readl(card->membase + STAT);
2708 return sprintf(page, "Pool count min init max \n");
2710 return sprintf(page, "Small %5d %5d %5d %5d \n",
2711 ns_stat_sfbqc_get(stat), card->sbnr.min, card->sbnr.init,
2714 return sprintf(page, "Large %5d %5d %5d %5d \n",
2715 ns_stat_lfbqc_get(stat), card->lbnr.min, card->lbnr.init,
2718 return sprintf(page, "Huge %5d %5d %5d %5d \n", card->hbpool.count,
2719 card->hbnr.min, card->hbnr.init, card->hbnr.max);
2721 return sprintf(page, "Iovec %5d %5d %5d %5d \n", card->iovpool.count,
2722 card->iovnr.min, card->iovnr.init, card->iovnr.max);
2726 retval = sprintf(page, "Interrupt counter: %u \n", card->intcnt);
2731 /* Dump 25.6 Mbps PHY registers */
2732 /* Now there's a 25.6 Mbps PHY driver this code isn't needed. I left it
2733 here just in case it's needed for debugging. */
2734 if (card->max_pcr == ATM_25_PCR && !left--)
2739 for (i = 0; i < 4; i++)
2741 while (CMD_BUSY(card));
2742 writel(NS_CMD_READ_UTILITY | 0x00000200 | i, card->membase + CMD);
2743 while (CMD_BUSY(card));
2744 phy_regs[i] = readl(card->membase + DR0) & 0x000000FF;
2747 return sprintf(page, "PHY regs: 0x%02X 0x%02X 0x%02X 0x%02X \n",
2748 phy_regs[0], phy_regs[1], phy_regs[2], phy_regs[3]);
2750 #endif /* 0 - Dump 25.6 Mbps PHY registers */
2753 if (left-- < NS_TST_NUM_ENTRIES)
2755 if (card->tste2vc[left + 1] == NULL)
2756 return sprintf(page, "%5d - VBR/UBR \n", left + 1);
2758 return sprintf(page, "%5d - %d %d \n", left + 1,
2759 card->tste2vc[left + 1]->tx_vcc->vpi,
2760 card->tste2vc[left + 1]->tx_vcc->vci);
2768 static int ns_ioctl(struct atm_dev *dev, unsigned int cmd, void __user *arg)
2773 unsigned long flags;
2775 card = dev->dev_data;
2779 if (get_user(pl.buftype, &((pool_levels __user *) arg)->buftype))
2783 case NS_BUFTYPE_SMALL:
2784 pl.count = ns_stat_sfbqc_get(readl(card->membase + STAT));
2785 pl.level.min = card->sbnr.min;
2786 pl.level.init = card->sbnr.init;
2787 pl.level.max = card->sbnr.max;
2790 case NS_BUFTYPE_LARGE:
2791 pl.count = ns_stat_lfbqc_get(readl(card->membase + STAT));
2792 pl.level.min = card->lbnr.min;
2793 pl.level.init = card->lbnr.init;
2794 pl.level.max = card->lbnr.max;
2797 case NS_BUFTYPE_HUGE:
2798 pl.count = card->hbpool.count;
2799 pl.level.min = card->hbnr.min;
2800 pl.level.init = card->hbnr.init;
2801 pl.level.max = card->hbnr.max;
2804 case NS_BUFTYPE_IOVEC:
2805 pl.count = card->iovpool.count;
2806 pl.level.min = card->iovnr.min;
2807 pl.level.init = card->iovnr.init;
2808 pl.level.max = card->iovnr.max;
2812 return -ENOIOCTLCMD;
2815 if (!copy_to_user((pool_levels __user *) arg, &pl, sizeof(pl)))
2816 return (sizeof(pl));
2821 if (!capable(CAP_NET_ADMIN))
2823 if (copy_from_user(&pl, (pool_levels __user *) arg, sizeof(pl)))
2825 if (pl.level.min >= pl.level.init || pl.level.init >= pl.level.max)
2827 if (pl.level.min == 0)
2831 case NS_BUFTYPE_SMALL:
2832 if (pl.level.max > TOP_SB)
2834 card->sbnr.min = pl.level.min;
2835 card->sbnr.init = pl.level.init;
2836 card->sbnr.max = pl.level.max;
2839 case NS_BUFTYPE_LARGE:
2840 if (pl.level.max > TOP_LB)
2842 card->lbnr.min = pl.level.min;
2843 card->lbnr.init = pl.level.init;
2844 card->lbnr.max = pl.level.max;
2847 case NS_BUFTYPE_HUGE:
2848 if (pl.level.max > TOP_HB)
2850 card->hbnr.min = pl.level.min;
2851 card->hbnr.init = pl.level.init;
2852 card->hbnr.max = pl.level.max;
2855 case NS_BUFTYPE_IOVEC:
2856 if (pl.level.max > TOP_IOVB)
2858 card->iovnr.min = pl.level.min;
2859 card->iovnr.init = pl.level.init;
2860 card->iovnr.max = pl.level.max;
2870 if (!capable(CAP_NET_ADMIN))
2872 btype = (int) arg; /* an int is the same size as a pointer */
2875 case NS_BUFTYPE_SMALL:
2876 while (card->sbfqc < card->sbnr.init)
2880 sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
2883 skb_queue_tail(&card->sbpool.queue, sb);
2884 skb_reserve(sb, NS_AAL0_HEADER);
2885 push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data), 0, 0);
2889 case NS_BUFTYPE_LARGE:
2890 while (card->lbfqc < card->lbnr.init)
2894 lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
2897 skb_queue_tail(&card->lbpool.queue, lb);
2898 skb_reserve(lb, NS_SMBUFSIZE);
2899 push_rxbufs(card, BUF_LG, (u32) lb, (u32) virt_to_bus(lb->data), 0, 0);
2903 case NS_BUFTYPE_HUGE:
2904 while (card->hbpool.count > card->hbnr.init)
2908 ns_grab_int_lock(card, flags);
2909 hb = skb_dequeue(&card->hbpool.queue);
2910 card->hbpool.count--;
2911 spin_unlock_irqrestore(&card->int_lock, flags);
2913 printk("nicstar%d: huge buffer count inconsistent.\n",
2916 dev_kfree_skb_any(hb);
2919 while (card->hbpool.count < card->hbnr.init)
2923 hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
2926 ns_grab_int_lock(card, flags);
2927 skb_queue_tail(&card->hbpool.queue, hb);
2928 card->hbpool.count++;
2929 spin_unlock_irqrestore(&card->int_lock, flags);
2933 case NS_BUFTYPE_IOVEC:
2934 while (card->iovpool.count > card->iovnr.init)
2936 struct sk_buff *iovb;
2938 ns_grab_int_lock(card, flags);
2939 iovb = skb_dequeue(&card->iovpool.queue);
2940 card->iovpool.count--;
2941 spin_unlock_irqrestore(&card->int_lock, flags);
2943 printk("nicstar%d: iovec buffer count inconsistent.\n",
2946 dev_kfree_skb_any(iovb);
2949 while (card->iovpool.count < card->iovnr.init)
2951 struct sk_buff *iovb;
2953 iovb = alloc_skb(NS_IOVBUFSIZE, GFP_KERNEL);
2956 ns_grab_int_lock(card, flags);
2957 skb_queue_tail(&card->iovpool.queue, iovb);
2958 card->iovpool.count++;
2959 spin_unlock_irqrestore(&card->int_lock, flags);
2970 if (dev->phy && dev->phy->ioctl) {
2971 return dev->phy->ioctl(dev, cmd, arg);
2974 printk("nicstar%d: %s == NULL \n", card->index,
2975 dev->phy ? "dev->phy->ioctl" : "dev->phy");
2976 return -ENOIOCTLCMD;
2983 static void which_list(ns_dev *card, struct sk_buff *skb)
2985 printk("It's a %s buffer.\n", skb->list == &card->sbpool.queue ?
2986 "small" : skb->list == &card->lbpool.queue ? "large" :
2987 skb->list == &card->hbpool.queue ? "huge" :
2988 skb->list == &card->iovpool.queue ? "iovec" : "unknown");
2993 static void ns_poll(unsigned long arg)
2997 unsigned long flags;
3000 PRINTK("nicstar: Entering ns_poll().\n");
3001 for (i = 0; i < num_cards; i++)
3004 if (spin_is_locked(&card->int_lock)) {
3005 /* Probably it isn't worth spinning */
3008 ns_grab_int_lock(card, flags);
3011 stat_r = readl(card->membase + STAT);
3012 if (stat_r & NS_STAT_TSIF)
3013 stat_w |= NS_STAT_TSIF;
3014 if (stat_r & NS_STAT_EOPDU)
3015 stat_w |= NS_STAT_EOPDU;
3020 writel(stat_w, card->membase + STAT);
3021 spin_unlock_irqrestore(&card->int_lock, flags);
3023 mod_timer(&ns_timer, jiffies + NS_POLL_PERIOD);
3024 PRINTK("nicstar: Leaving ns_poll().\n");
3029 static int ns_parse_mac(char *mac, unsigned char *esi)
3034 if (mac == NULL || esi == NULL)
3037 for (i = 0; i < 6; i++)
3039 if ((byte1 = ns_h2i(mac[j++])) < 0)
3041 if ((byte0 = ns_h2i(mac[j++])) < 0)
3043 esi[i] = (unsigned char) (byte1 * 16 + byte0);
3046 if (mac[j++] != ':')
3055 static short ns_h2i(char c)
3057 if (c >= '0' && c <= '9')
3058 return (short) (c - '0');
3059 if (c >= 'A' && c <= 'F')
3060 return (short) (c - 'A' + 10);
3061 if (c >= 'a' && c <= 'f')
3062 return (short) (c - 'a' + 10);
3068 static void ns_phy_put(struct atm_dev *dev, unsigned char value,
3072 unsigned long flags;
3074 card = dev->dev_data;
3075 ns_grab_res_lock(card, flags);
3076 while(CMD_BUSY(card));
3077 writel((unsigned long) value, card->membase + DR0);
3078 writel(NS_CMD_WRITE_UTILITY | 0x00000200 | (addr & 0x000000FF),
3079 card->membase + CMD);
3080 spin_unlock_irqrestore(&card->res_lock, flags);
3085 static unsigned char ns_phy_get(struct atm_dev *dev, unsigned long addr)
3088 unsigned long flags;
3091 card = dev->dev_data;
3092 ns_grab_res_lock(card, flags);
3093 while(CMD_BUSY(card));
3094 writel(NS_CMD_READ_UTILITY | 0x00000200 | (addr & 0x000000FF),
3095 card->membase + CMD);
3096 while(CMD_BUSY(card));
3097 data = readl(card->membase + DR0) & 0x000000FF;
3098 spin_unlock_irqrestore(&card->res_lock, flags);
3099 return (unsigned char) data;
3104 module_init(nicstar_init);
3105 module_exit(nicstar_cleanup);