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/kernel.h>
40 #include <linux/skbuff.h>
41 #include <linux/atmdev.h>
42 #include <linux/atm.h>
43 #include <linux/pci.h>
44 #include <linux/types.h>
45 #include <linux/string.h>
46 #include <linux/delay.h>
47 #include <linux/init.h>
48 #include <linux/sched.h>
49 #include <linux/timer.h>
50 #include <linux/interrupt.h>
51 #include <linux/bitops.h>
53 #include <asm/uaccess.h>
54 #include <asm/atomic.h>
56 #ifdef CONFIG_ATM_NICSTAR_USE_SUNI
58 #endif /* CONFIG_ATM_NICSTAR_USE_SUNI */
59 #ifdef CONFIG_ATM_NICSTAR_USE_IDT77105
61 #endif /* CONFIG_ATM_NICSTAR_USE_IDT77105 */
63 #if BITS_PER_LONG != 32
64 # error FIXME: this driver requires a 32-bit platform
67 /* Additional code ************************************************************/
69 #include "nicstarmac.c"
72 /* Configurable parameters ****************************************************/
80 #undef NS_USE_DESTRUCTORS /* For now keep this undefined unless you know
81 you're going to use only raw ATM */
84 /* Do not touch these *********************************************************/
87 #define TXPRINTK(args...) printk(args)
89 #define TXPRINTK(args...)
93 #define RXPRINTK(args...) printk(args)
95 #define RXPRINTK(args...)
99 #define PRINTK(args...) printk(args)
101 #define PRINTK(args...)
102 #endif /* GENERAL_DEBUG */
105 #define XPRINTK(args...) printk(args)
107 #define XPRINTK(args...)
108 #endif /* EXTRA_DEBUG */
111 /* Macros *********************************************************************/
113 #define CMD_BUSY(card) (readl((card)->membase + STAT) & NS_STAT_CMDBZ)
115 #define NS_DELAY mdelay(1)
117 #define ALIGN_BUS_ADDR(addr, alignment) \
118 ((((u32) (addr)) + (((u32) (alignment)) - 1)) & ~(((u32) (alignment)) - 1))
119 #define ALIGN_ADDRESS(addr, alignment) \
120 bus_to_virt(ALIGN_BUS_ADDR(virt_to_bus(addr), alignment))
125 #define ATM_SKB(s) (&(s)->atm)
128 /* Spinlock debugging stuff */
129 #ifdef NS_DEBUG_SPINLOCKS /* See nicstar.h */
130 #define ns_grab_int_lock(card,flags) \
132 unsigned long nsdsf, nsdsf2; \
133 local_irq_save(flags); \
134 save_flags(nsdsf); cli();\
135 if (nsdsf & (1<<9)) printk ("nicstar.c: ints %sabled -> enabled.\n", \
136 (flags)&(1<<9)?"en":"dis"); \
137 if (spin_is_locked(&(card)->int_lock) && \
138 (card)->cpu_int == smp_processor_id()) { \
139 printk("nicstar.c: line %d (cpu %d) int_lock already locked at line %d (cpu %d)\n", \
140 __LINE__, smp_processor_id(), (card)->has_int_lock, \
142 printk("nicstar.c: ints were %sabled.\n", ((flags)&(1<<9)?"en":"dis")); \
144 if (spin_is_locked(&(card)->res_lock) && \
145 (card)->cpu_res == smp_processor_id()) { \
146 printk("nicstar.c: line %d (cpu %d) res_lock locked at line %d (cpu %d)(trying int)\n", \
147 __LINE__, smp_processor_id(), (card)->has_res_lock, \
149 printk("nicstar.c: ints were %sabled.\n", ((flags)&(1<<9)?"en":"dis")); \
151 spin_lock_irq(&(card)->int_lock); \
152 (card)->has_int_lock = __LINE__; \
153 (card)->cpu_int = smp_processor_id(); \
154 restore_flags(nsdsf); } while (0)
155 #define ns_grab_res_lock(card,flags) \
157 unsigned long nsdsf, nsdsf2; \
158 local_irq_save(flags); \
159 save_flags(nsdsf); cli();\
160 if (nsdsf & (1<<9)) printk ("nicstar.c: ints %sabled -> enabled.\n", \
161 (flags)&(1<<9)?"en":"dis"); \
162 if (spin_is_locked(&(card)->res_lock) && \
163 (card)->cpu_res == smp_processor_id()) { \
164 printk("nicstar.c: line %d (cpu %d) res_lock already locked at line %d (cpu %d)\n", \
165 __LINE__, smp_processor_id(), (card)->has_res_lock, \
167 printk("nicstar.c: ints were %sabled.\n", ((flags)&(1<<9)?"en":"dis")); \
169 spin_lock_irq(&(card)->res_lock); \
170 (card)->has_res_lock = __LINE__; \
171 (card)->cpu_res = smp_processor_id(); \
172 restore_flags(nsdsf); } while (0)
173 #define ns_grab_scq_lock(card,scq,flags) \
175 unsigned long nsdsf, nsdsf2; \
176 local_irq_save(flags); \
177 save_flags(nsdsf); cli();\
178 if (nsdsf & (1<<9)) printk ("nicstar.c: ints %sabled -> enabled.\n", \
179 (flags)&(1<<9)?"en":"dis"); \
180 if (spin_is_locked(&(scq)->lock) && \
181 (scq)->cpu_lock == smp_processor_id()) { \
182 printk("nicstar.c: line %d (cpu %d) this scq_lock already locked at line %d (cpu %d)\n", \
183 __LINE__, smp_processor_id(), (scq)->has_lock, \
185 printk("nicstar.c: ints were %sabled.\n", ((flags)&(1<<9)?"en":"dis")); \
187 if (spin_is_locked(&(card)->res_lock) && \
188 (card)->cpu_res == smp_processor_id()) { \
189 printk("nicstar.c: line %d (cpu %d) res_lock locked at line %d (cpu %d)(trying scq)\n", \
190 __LINE__, smp_processor_id(), (card)->has_res_lock, \
192 printk("nicstar.c: ints were %sabled.\n", ((flags)&(1<<9)?"en":"dis")); \
194 spin_lock_irq(&(scq)->lock); \
195 (scq)->has_lock = __LINE__; \
196 (scq)->cpu_lock = smp_processor_id(); \
197 restore_flags(nsdsf); } while (0)
198 #else /* !NS_DEBUG_SPINLOCKS */
199 #define ns_grab_int_lock(card,flags) \
200 spin_lock_irqsave(&(card)->int_lock,(flags))
201 #define ns_grab_res_lock(card,flags) \
202 spin_lock_irqsave(&(card)->res_lock,(flags))
203 #define ns_grab_scq_lock(card,scq,flags) \
204 spin_lock_irqsave(&(scq)->lock,flags)
205 #endif /* NS_DEBUG_SPINLOCKS */
208 /* Function declarations ******************************************************/
210 static u32 ns_read_sram(ns_dev *card, u32 sram_address);
211 static void ns_write_sram(ns_dev *card, u32 sram_address, u32 *value, int count);
212 static int __devinit ns_init_card(int i, struct pci_dev *pcidev);
213 static void __devinit ns_init_card_error(ns_dev *card, int error);
214 static scq_info *get_scq(int size, u32 scd);
215 static void free_scq(scq_info *scq, struct atm_vcc *vcc);
216 static void push_rxbufs(ns_dev *, struct sk_buff *);
217 static irqreturn_t ns_irq_handler(int irq, void *dev_id);
218 static int ns_open(struct atm_vcc *vcc);
219 static void ns_close(struct atm_vcc *vcc);
220 static void fill_tst(ns_dev *card, int n, vc_map *vc);
221 static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb);
222 static int push_scqe(ns_dev *card, vc_map *vc, scq_info *scq, ns_scqe *tbd,
223 struct sk_buff *skb);
224 static void process_tsq(ns_dev *card);
225 static void drain_scq(ns_dev *card, scq_info *scq, int pos);
226 static void process_rsq(ns_dev *card);
227 static void dequeue_rx(ns_dev *card, ns_rsqe *rsqe);
228 #ifdef NS_USE_DESTRUCTORS
229 static void ns_sb_destructor(struct sk_buff *sb);
230 static void ns_lb_destructor(struct sk_buff *lb);
231 static void ns_hb_destructor(struct sk_buff *hb);
232 #endif /* NS_USE_DESTRUCTORS */
233 static void recycle_rx_buf(ns_dev *card, struct sk_buff *skb);
234 static void recycle_iovec_rx_bufs(ns_dev *card, struct iovec *iov, int count);
235 static void recycle_iov_buf(ns_dev *card, struct sk_buff *iovb);
236 static void dequeue_sm_buf(ns_dev *card, struct sk_buff *sb);
237 static void dequeue_lg_buf(ns_dev *card, struct sk_buff *lb);
238 static int ns_proc_read(struct atm_dev *dev, loff_t *pos, char *page);
239 static int ns_ioctl(struct atm_dev *dev, unsigned int cmd, void __user *arg);
240 static void which_list(ns_dev *card, struct sk_buff *skb);
241 static void ns_poll(unsigned long arg);
242 static int ns_parse_mac(char *mac, unsigned char *esi);
243 static short ns_h2i(char c);
244 static void ns_phy_put(struct atm_dev *dev, unsigned char value,
246 static unsigned char ns_phy_get(struct atm_dev *dev, unsigned long addr);
250 /* Global variables ***********************************************************/
252 static struct ns_dev *cards[NS_MAX_CARDS];
253 static unsigned num_cards;
254 static struct atmdev_ops atm_ops =
260 .phy_put = ns_phy_put,
261 .phy_get = ns_phy_get,
262 .proc_read = ns_proc_read,
263 .owner = THIS_MODULE,
265 static struct timer_list ns_timer;
266 static char *mac[NS_MAX_CARDS];
267 module_param_array(mac, charp, NULL, 0);
268 MODULE_LICENSE("GPL");
271 /* Functions*******************************************************************/
273 static int __devinit nicstar_init_one(struct pci_dev *pcidev,
274 const struct pci_device_id *ent)
276 static int index = -1;
282 error = ns_init_card(index, pcidev);
284 cards[index--] = NULL; /* don't increment index */
295 static void __devexit nicstar_remove_one(struct pci_dev *pcidev)
298 ns_dev *card = pci_get_drvdata(pcidev);
300 struct sk_buff *iovb;
306 if (cards[i] == NULL)
309 if (card->atmdev->phy && card->atmdev->phy->stop)
310 card->atmdev->phy->stop(card->atmdev);
312 /* Stop everything */
313 writel(0x00000000, card->membase + CFG);
315 /* De-register device */
316 atm_dev_deregister(card->atmdev);
318 /* Disable PCI device */
319 pci_disable_device(pcidev);
321 /* Free up resources */
323 PRINTK("nicstar%d: freeing %d huge buffers.\n", i, card->hbpool.count);
324 while ((hb = skb_dequeue(&card->hbpool.queue)) != NULL)
326 dev_kfree_skb_any(hb);
329 PRINTK("nicstar%d: %d huge buffers freed.\n", i, j);
331 PRINTK("nicstar%d: freeing %d iovec buffers.\n", i, card->iovpool.count);
332 while ((iovb = skb_dequeue(&card->iovpool.queue)) != NULL)
334 dev_kfree_skb_any(iovb);
337 PRINTK("nicstar%d: %d iovec buffers freed.\n", i, j);
338 while ((lb = skb_dequeue(&card->lbpool.queue)) != NULL)
339 dev_kfree_skb_any(lb);
340 while ((sb = skb_dequeue(&card->sbpool.queue)) != NULL)
341 dev_kfree_skb_any(sb);
342 free_scq(card->scq0, NULL);
343 for (j = 0; j < NS_FRSCD_NUM; j++)
345 if (card->scd2vc[j] != NULL)
346 free_scq(card->scd2vc[j]->scq, card->scd2vc[j]->tx_vcc);
348 kfree(card->rsq.org);
349 kfree(card->tsq.org);
350 free_irq(card->pcidev->irq, card);
351 iounmap(card->membase);
357 static struct pci_device_id nicstar_pci_tbl[] __devinitdata =
359 {PCI_VENDOR_ID_IDT, PCI_DEVICE_ID_IDT_IDT77201,
360 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
361 {0,} /* terminate list */
363 MODULE_DEVICE_TABLE(pci, nicstar_pci_tbl);
367 static struct pci_driver nicstar_driver = {
369 .id_table = nicstar_pci_tbl,
370 .probe = nicstar_init_one,
371 .remove = __devexit_p(nicstar_remove_one),
376 static int __init nicstar_init(void)
378 unsigned error = 0; /* Initialized to remove compile warning */
380 XPRINTK("nicstar: nicstar_init() called.\n");
382 error = pci_register_driver(&nicstar_driver);
384 TXPRINTK("nicstar: TX debug enabled.\n");
385 RXPRINTK("nicstar: RX debug enabled.\n");
386 PRINTK("nicstar: General debug enabled.\n");
388 printk("nicstar: using PHY loopback.\n");
389 #endif /* PHY_LOOPBACK */
390 XPRINTK("nicstar: nicstar_init() returned.\n");
393 init_timer(&ns_timer);
394 ns_timer.expires = jiffies + NS_POLL_PERIOD;
396 ns_timer.function = ns_poll;
397 add_timer(&ns_timer);
405 static void __exit nicstar_cleanup(void)
407 XPRINTK("nicstar: nicstar_cleanup() called.\n");
409 del_timer(&ns_timer);
411 pci_unregister_driver(&nicstar_driver);
413 XPRINTK("nicstar: nicstar_cleanup() returned.\n");
418 static u32 ns_read_sram(ns_dev *card, u32 sram_address)
423 sram_address &= 0x0007FFFC; /* address must be dword aligned */
424 sram_address |= 0x50000000; /* SRAM read command */
425 ns_grab_res_lock(card, flags);
426 while (CMD_BUSY(card));
427 writel(sram_address, card->membase + CMD);
428 while (CMD_BUSY(card));
429 data = readl(card->membase + DR0);
430 spin_unlock_irqrestore(&card->res_lock, flags);
436 static void ns_write_sram(ns_dev *card, u32 sram_address, u32 *value, int count)
440 count--; /* count range now is 0..3 instead of 1..4 */
442 c <<= 2; /* to use increments of 4 */
443 ns_grab_res_lock(card, flags);
444 while (CMD_BUSY(card));
445 for (i = 0; i <= c; i += 4)
446 writel(*(value++), card->membase + i);
447 /* Note: DR# registers are the first 4 dwords in nicstar's memspace,
448 so card->membase + DR0 == card->membase */
450 sram_address &= 0x0007FFFC;
451 sram_address |= (0x40000000 | count);
452 writel(sram_address, card->membase + CMD);
453 spin_unlock_irqrestore(&card->res_lock, flags);
457 static int __devinit ns_init_card(int i, struct pci_dev *pcidev)
460 struct ns_dev *card = NULL;
461 unsigned char pci_latency;
467 unsigned long membase;
471 if (pci_enable_device(pcidev))
473 printk("nicstar%d: can't enable PCI device\n", i);
475 ns_init_card_error(card, error);
479 if ((card = kmalloc(sizeof(ns_dev), GFP_KERNEL)) == NULL)
481 printk("nicstar%d: can't allocate memory for device structure.\n", i);
483 ns_init_card_error(card, error);
487 spin_lock_init(&card->int_lock);
488 spin_lock_init(&card->res_lock);
490 pci_set_drvdata(pcidev, card);
494 card->pcidev = pcidev;
495 membase = pci_resource_start(pcidev, 1);
496 card->membase = ioremap(membase, NS_IOREMAP_SIZE);
497 if (card->membase == 0)
499 printk("nicstar%d: can't ioremap() membase.\n",i);
501 ns_init_card_error(card, error);
504 PRINTK("nicstar%d: membase at 0x%x.\n", i, card->membase);
506 pci_set_master(pcidev);
508 if (pci_read_config_byte(pcidev, PCI_LATENCY_TIMER, &pci_latency) != 0)
510 printk("nicstar%d: can't read PCI latency timer.\n", i);
512 ns_init_card_error(card, error);
515 #ifdef NS_PCI_LATENCY
516 if (pci_latency < NS_PCI_LATENCY)
518 PRINTK("nicstar%d: setting PCI latency timer to %d.\n", i, NS_PCI_LATENCY);
519 for (j = 1; j < 4; j++)
521 if (pci_write_config_byte(pcidev, PCI_LATENCY_TIMER, NS_PCI_LATENCY) != 0)
526 printk("nicstar%d: can't set PCI latency timer to %d.\n", i, NS_PCI_LATENCY);
528 ns_init_card_error(card, error);
532 #endif /* NS_PCI_LATENCY */
534 /* Clear timer overflow */
535 data = readl(card->membase + STAT);
536 if (data & NS_STAT_TMROF)
537 writel(NS_STAT_TMROF, card->membase + STAT);
540 writel(NS_CFG_SWRST, card->membase + CFG);
542 writel(0x00000000, card->membase + CFG);
545 writel(0x00000008, card->membase + GP);
547 writel(0x00000001, card->membase + GP);
549 while (CMD_BUSY(card));
550 writel(NS_CMD_WRITE_UTILITY | 0x00000100, card->membase + CMD); /* Sync UTOPIA with SAR clock */
553 /* Detect PHY type */
554 while (CMD_BUSY(card));
555 writel(NS_CMD_READ_UTILITY | 0x00000200, card->membase + CMD);
556 while (CMD_BUSY(card));
557 data = readl(card->membase + DR0);
560 printk("nicstar%d: PHY seems to be 25 Mbps.\n", i);
561 card->max_pcr = ATM_25_PCR;
562 while(CMD_BUSY(card));
563 writel(0x00000008, card->membase + DR0);
564 writel(NS_CMD_WRITE_UTILITY | 0x00000200, card->membase + CMD);
565 /* Clear an eventual pending interrupt */
566 writel(NS_STAT_SFBQF, card->membase + STAT);
568 while(CMD_BUSY(card));
569 writel(0x00000022, card->membase + DR0);
570 writel(NS_CMD_WRITE_UTILITY | 0x00000202, card->membase + CMD);
571 #endif /* PHY_LOOPBACK */
575 printk("nicstar%d: PHY seems to be 155 Mbps.\n", i);
576 card->max_pcr = ATM_OC3_PCR;
578 while(CMD_BUSY(card));
579 writel(0x00000002, card->membase + DR0);
580 writel(NS_CMD_WRITE_UTILITY | 0x00000205, card->membase + CMD);
581 #endif /* PHY_LOOPBACK */
584 printk("nicstar%d: unknown PHY type (0x%08X).\n", i, data);
586 ns_init_card_error(card, error);
589 writel(0x00000000, card->membase + GP);
591 /* Determine SRAM size */
593 ns_write_sram(card, 0x1C003, &data, 1);
595 ns_write_sram(card, 0x14003, &data, 1);
596 if (ns_read_sram(card, 0x14003) == 0x89ABCDEF &&
597 ns_read_sram(card, 0x1C003) == 0x76543210)
598 card->sram_size = 128;
600 card->sram_size = 32;
601 PRINTK("nicstar%d: %dK x 32bit SRAM size.\n", i, card->sram_size);
603 card->rct_size = NS_MAX_RCTSIZE;
605 #if (NS_MAX_RCTSIZE == 4096)
606 if (card->sram_size == 128)
607 printk("nicstar%d: limiting maximum VCI. See NS_MAX_RCTSIZE in nicstar.h\n", i);
608 #elif (NS_MAX_RCTSIZE == 16384)
609 if (card->sram_size == 32)
611 printk("nicstar%d: wasting memory. See NS_MAX_RCTSIZE in nicstar.h\n", i);
612 card->rct_size = 4096;
615 #error NS_MAX_RCTSIZE must be either 4096 or 16384 in nicstar.c
618 card->vpibits = NS_VPIBITS;
619 if (card->rct_size == 4096)
620 card->vcibits = 12 - NS_VPIBITS;
621 else /* card->rct_size == 16384 */
622 card->vcibits = 14 - NS_VPIBITS;
624 /* Initialize the nicstar eeprom/eprom stuff, for the MAC addr */
626 nicstar_init_eprom(card->membase);
628 /* Set the VPI/VCI MSb mask to zero so we can receive OAM cells */
629 writel(0x00000000, card->membase + VPM);
632 card->tsq.org = kmalloc(NS_TSQSIZE + NS_TSQ_ALIGNMENT, GFP_KERNEL);
633 if (card->tsq.org == NULL)
635 printk("nicstar%d: can't allocate TSQ.\n", i);
637 ns_init_card_error(card, error);
640 card->tsq.base = (ns_tsi *) ALIGN_ADDRESS(card->tsq.org, NS_TSQ_ALIGNMENT);
641 card->tsq.next = card->tsq.base;
642 card->tsq.last = card->tsq.base + (NS_TSQ_NUM_ENTRIES - 1);
643 for (j = 0; j < NS_TSQ_NUM_ENTRIES; j++)
644 ns_tsi_init(card->tsq.base + j);
645 writel(0x00000000, card->membase + TSQH);
646 writel((u32) virt_to_bus(card->tsq.base), card->membase + TSQB);
647 PRINTK("nicstar%d: TSQ base at 0x%x 0x%x 0x%x.\n", i, (u32) card->tsq.base,
648 (u32) virt_to_bus(card->tsq.base), readl(card->membase + TSQB));
651 card->rsq.org = kmalloc(NS_RSQSIZE + NS_RSQ_ALIGNMENT, GFP_KERNEL);
652 if (card->rsq.org == NULL)
654 printk("nicstar%d: can't allocate RSQ.\n", i);
656 ns_init_card_error(card, error);
659 card->rsq.base = (ns_rsqe *) ALIGN_ADDRESS(card->rsq.org, NS_RSQ_ALIGNMENT);
660 card->rsq.next = card->rsq.base;
661 card->rsq.last = card->rsq.base + (NS_RSQ_NUM_ENTRIES - 1);
662 for (j = 0; j < NS_RSQ_NUM_ENTRIES; j++)
663 ns_rsqe_init(card->rsq.base + j);
664 writel(0x00000000, card->membase + RSQH);
665 writel((u32) virt_to_bus(card->rsq.base), card->membase + RSQB);
666 PRINTK("nicstar%d: RSQ base at 0x%x.\n", i, (u32) card->rsq.base);
668 /* Initialize SCQ0, the only VBR SCQ used */
671 card->scq0 = get_scq(VBR_SCQSIZE, NS_VRSCD0);
672 if (card->scq0 == NULL)
674 printk("nicstar%d: can't get SCQ0.\n", i);
676 ns_init_card_error(card, error);
679 u32d[0] = (u32) virt_to_bus(card->scq0->base);
680 u32d[1] = (u32) 0x00000000;
681 u32d[2] = (u32) 0xffffffff;
682 u32d[3] = (u32) 0x00000000;
683 ns_write_sram(card, NS_VRSCD0, u32d, 4);
684 ns_write_sram(card, NS_VRSCD1, u32d, 4); /* These last two won't be used */
685 ns_write_sram(card, NS_VRSCD2, u32d, 4); /* but are initialized, just in case... */
686 card->scq0->scd = NS_VRSCD0;
687 PRINTK("nicstar%d: VBR-SCQ0 base at 0x%x.\n", i, (u32) card->scq0->base);
689 /* Initialize TSTs */
690 card->tst_addr = NS_TST0;
691 card->tst_free_entries = NS_TST_NUM_ENTRIES;
692 data = NS_TST_OPCODE_VARIABLE;
693 for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
694 ns_write_sram(card, NS_TST0 + j, &data, 1);
695 data = ns_tste_make(NS_TST_OPCODE_END, NS_TST0);
696 ns_write_sram(card, NS_TST0 + NS_TST_NUM_ENTRIES, &data, 1);
697 for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
698 ns_write_sram(card, NS_TST1 + j, &data, 1);
699 data = ns_tste_make(NS_TST_OPCODE_END, NS_TST1);
700 ns_write_sram(card, NS_TST1 + NS_TST_NUM_ENTRIES, &data, 1);
701 for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
702 card->tste2vc[j] = NULL;
703 writel(NS_TST0 << 2, card->membase + TSTB);
706 /* Initialize RCT. AAL type is set on opening the VC. */
708 u32d[0] = NS_RCTE_RAWCELLINTEN;
710 u32d[0] = 0x00000000;
711 #endif /* RCQ_SUPPORT */
712 u32d[1] = 0x00000000;
713 u32d[2] = 0x00000000;
714 u32d[3] = 0xFFFFFFFF;
715 for (j = 0; j < card->rct_size; j++)
716 ns_write_sram(card, j * 4, u32d, 4);
718 memset(card->vcmap, 0, NS_MAX_RCTSIZE * sizeof(vc_map));
720 for (j = 0; j < NS_FRSCD_NUM; j++)
721 card->scd2vc[j] = NULL;
723 /* Initialize buffer levels */
724 card->sbnr.min = MIN_SB;
725 card->sbnr.init = NUM_SB;
726 card->sbnr.max = MAX_SB;
727 card->lbnr.min = MIN_LB;
728 card->lbnr.init = NUM_LB;
729 card->lbnr.max = MAX_LB;
730 card->iovnr.min = MIN_IOVB;
731 card->iovnr.init = NUM_IOVB;
732 card->iovnr.max = MAX_IOVB;
733 card->hbnr.min = MIN_HB;
734 card->hbnr.init = NUM_HB;
735 card->hbnr.max = MAX_HB;
737 card->sm_handle = 0x00000000;
738 card->sm_addr = 0x00000000;
739 card->lg_handle = 0x00000000;
740 card->lg_addr = 0x00000000;
742 card->efbie = 1; /* To prevent push_rxbufs from enabling the interrupt */
744 /* Pre-allocate some huge buffers */
745 skb_queue_head_init(&card->hbpool.queue);
746 card->hbpool.count = 0;
747 for (j = 0; j < NUM_HB; j++)
750 hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
753 printk("nicstar%d: can't allocate %dth of %d huge buffers.\n",
756 ns_init_card_error(card, error);
759 NS_SKB_CB(hb)->buf_type = BUF_NONE;
760 skb_queue_tail(&card->hbpool.queue, hb);
761 card->hbpool.count++;
765 /* Allocate large buffers */
766 skb_queue_head_init(&card->lbpool.queue);
767 card->lbpool.count = 0; /* Not used */
768 for (j = 0; j < NUM_LB; j++)
771 lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
774 printk("nicstar%d: can't allocate %dth of %d large buffers.\n",
777 ns_init_card_error(card, error);
780 NS_SKB_CB(lb)->buf_type = BUF_LG;
781 skb_queue_tail(&card->lbpool.queue, lb);
782 skb_reserve(lb, NS_SMBUFSIZE);
783 push_rxbufs(card, lb);
784 /* Due to the implementation of push_rxbufs() this is 1, not 0 */
788 card->rawch = (u32) virt_to_bus(lb->data);
791 /* Test for strange behaviour which leads to crashes */
792 if ((bcount = ns_stat_lfbqc_get(readl(card->membase + STAT))) < card->lbnr.min)
794 printk("nicstar%d: Strange... Just allocated %d large buffers and lfbqc = %d.\n",
797 ns_init_card_error(card, error);
802 /* Allocate small buffers */
803 skb_queue_head_init(&card->sbpool.queue);
804 card->sbpool.count = 0; /* Not used */
805 for (j = 0; j < NUM_SB; j++)
808 sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
811 printk("nicstar%d: can't allocate %dth of %d small buffers.\n",
814 ns_init_card_error(card, error);
817 NS_SKB_CB(sb)->buf_type = BUF_SM;
818 skb_queue_tail(&card->sbpool.queue, sb);
819 skb_reserve(sb, NS_AAL0_HEADER);
820 push_rxbufs(card, sb);
822 /* Test for strange behaviour which leads to crashes */
823 if ((bcount = ns_stat_sfbqc_get(readl(card->membase + STAT))) < card->sbnr.min)
825 printk("nicstar%d: Strange... Just allocated %d small buffers and sfbqc = %d.\n",
828 ns_init_card_error(card, error);
833 /* Allocate iovec buffers */
834 skb_queue_head_init(&card->iovpool.queue);
835 card->iovpool.count = 0;
836 for (j = 0; j < NUM_IOVB; j++)
838 struct sk_buff *iovb;
839 iovb = alloc_skb(NS_IOVBUFSIZE, GFP_KERNEL);
842 printk("nicstar%d: can't allocate %dth of %d iovec buffers.\n",
845 ns_init_card_error(card, error);
848 NS_SKB_CB(iovb)->buf_type = BUF_NONE;
849 skb_queue_tail(&card->iovpool.queue, iovb);
850 card->iovpool.count++;
853 /* Configure NICStAR */
854 if (card->rct_size == 4096)
855 ns_cfg_rctsize = NS_CFG_RCTSIZE_4096_ENTRIES;
856 else /* (card->rct_size == 16384) */
857 ns_cfg_rctsize = NS_CFG_RCTSIZE_16384_ENTRIES;
862 if (request_irq(pcidev->irq, &ns_irq_handler, IRQF_DISABLED | IRQF_SHARED, "nicstar", card) != 0)
864 printk("nicstar%d: can't allocate IRQ %d.\n", i, pcidev->irq);
866 ns_init_card_error(card, error);
870 /* Register device */
871 card->atmdev = atm_dev_register("nicstar", &atm_ops, -1, NULL);
872 if (card->atmdev == NULL)
874 printk("nicstar%d: can't register device.\n", i);
876 ns_init_card_error(card, error);
880 if (ns_parse_mac(mac[i], card->atmdev->esi)) {
881 nicstar_read_eprom(card->membase, NICSTAR_EPROM_MAC_ADDR_OFFSET,
882 card->atmdev->esi, 6);
883 if (memcmp(card->atmdev->esi, "\x00\x00\x00\x00\x00\x00", 6) == 0) {
884 nicstar_read_eprom(card->membase, NICSTAR_EPROM_MAC_ADDR_OFFSET_ALT,
885 card->atmdev->esi, 6);
889 printk("nicstar%d: MAC address %02X:%02X:%02X:%02X:%02X:%02X\n", i,
890 card->atmdev->esi[0], card->atmdev->esi[1], card->atmdev->esi[2],
891 card->atmdev->esi[3], card->atmdev->esi[4], card->atmdev->esi[5]);
893 card->atmdev->dev_data = card;
894 card->atmdev->ci_range.vpi_bits = card->vpibits;
895 card->atmdev->ci_range.vci_bits = card->vcibits;
896 card->atmdev->link_rate = card->max_pcr;
897 card->atmdev->phy = NULL;
899 #ifdef CONFIG_ATM_NICSTAR_USE_SUNI
900 if (card->max_pcr == ATM_OC3_PCR)
901 suni_init(card->atmdev);
902 #endif /* CONFIG_ATM_NICSTAR_USE_SUNI */
904 #ifdef CONFIG_ATM_NICSTAR_USE_IDT77105
905 if (card->max_pcr == ATM_25_PCR)
906 idt77105_init(card->atmdev);
907 #endif /* CONFIG_ATM_NICSTAR_USE_IDT77105 */
909 if (card->atmdev->phy && card->atmdev->phy->start)
910 card->atmdev->phy->start(card->atmdev);
912 writel(NS_CFG_RXPATH |
919 NS_CFG_RXINT_NODELAY |
920 NS_CFG_RAWIE | /* Only enabled if RCQ_SUPPORT */
924 NS_CFG_TSQFIE_OPT | /* Only enabled if ENABLE_TSQFIE */
926 card->membase + CFG);
935 static void __devinit ns_init_card_error(ns_dev *card, int error)
939 writel(0x00000000, card->membase + CFG);
943 struct sk_buff *iovb;
944 while ((iovb = skb_dequeue(&card->iovpool.queue)) != NULL)
945 dev_kfree_skb_any(iovb);
950 while ((sb = skb_dequeue(&card->sbpool.queue)) != NULL)
951 dev_kfree_skb_any(sb);
952 free_scq(card->scq0, NULL);
957 while ((lb = skb_dequeue(&card->lbpool.queue)) != NULL)
958 dev_kfree_skb_any(lb);
963 while ((hb = skb_dequeue(&card->hbpool.queue)) != NULL)
964 dev_kfree_skb_any(hb);
968 kfree(card->rsq.org);
972 kfree(card->tsq.org);
976 free_irq(card->pcidev->irq, card);
980 iounmap(card->membase);
984 pci_disable_device(card->pcidev);
991 static scq_info *get_scq(int size, u32 scd)
996 if (size != VBR_SCQSIZE && size != CBR_SCQSIZE)
999 scq = kmalloc(sizeof(scq_info), GFP_KERNEL);
1002 scq->org = kmalloc(2 * size, GFP_KERNEL);
1003 if (scq->org == NULL)
1008 scq->skb = kmalloc(sizeof(struct sk_buff *) *
1009 (size / NS_SCQE_SIZE), GFP_KERNEL);
1010 if (scq->skb == NULL)
1016 scq->num_entries = size / NS_SCQE_SIZE;
1017 scq->base = (ns_scqe *) ALIGN_ADDRESS(scq->org, size);
1018 scq->next = scq->base;
1019 scq->last = scq->base + (scq->num_entries - 1);
1020 scq->tail = scq->last;
1022 scq->num_entries = size / NS_SCQE_SIZE;
1024 init_waitqueue_head(&scq->scqfull_waitq);
1026 spin_lock_init(&scq->lock);
1028 for (i = 0; i < scq->num_entries; i++)
1036 /* For variable rate SCQ vcc must be NULL */
1037 static void free_scq(scq_info *scq, struct atm_vcc *vcc)
1041 if (scq->num_entries == VBR_SCQ_NUM_ENTRIES)
1042 for (i = 0; i < scq->num_entries; i++)
1044 if (scq->skb[i] != NULL)
1046 vcc = ATM_SKB(scq->skb[i])->vcc;
1047 if (vcc->pop != NULL)
1048 vcc->pop(vcc, scq->skb[i]);
1050 dev_kfree_skb_any(scq->skb[i]);
1053 else /* vcc must be != NULL */
1057 printk("nicstar: free_scq() called with vcc == NULL for fixed rate scq.");
1058 for (i = 0; i < scq->num_entries; i++)
1059 dev_kfree_skb_any(scq->skb[i]);
1062 for (i = 0; i < scq->num_entries; i++)
1064 if (scq->skb[i] != NULL)
1066 if (vcc->pop != NULL)
1067 vcc->pop(vcc, scq->skb[i]);
1069 dev_kfree_skb_any(scq->skb[i]);
1080 /* The handles passed must be pointers to the sk_buff containing the small
1081 or large buffer(s) cast to u32. */
1082 static void push_rxbufs(ns_dev *card, struct sk_buff *skb)
1084 struct ns_skb_cb *cb = NS_SKB_CB(skb);
1088 unsigned long flags;
1091 handle2 = addr2 = 0;
1093 addr1 = (u32)virt_to_bus(skb->data);
1095 #ifdef GENERAL_DEBUG
1097 printk("nicstar%d: push_rxbufs called with addr1 = 0.\n", card->index);
1098 #endif /* GENERAL_DEBUG */
1100 stat = readl(card->membase + STAT);
1101 card->sbfqc = ns_stat_sfbqc_get(stat);
1102 card->lbfqc = ns_stat_lfbqc_get(stat);
1103 if (cb->buf_type == BUF_SM)
1109 addr2 = card->sm_addr;
1110 handle2 = card->sm_handle;
1111 card->sm_addr = 0x00000000;
1112 card->sm_handle = 0x00000000;
1114 else /* (!sm_addr) */
1116 card->sm_addr = addr1;
1117 card->sm_handle = handle1;
1121 else /* buf_type == BUF_LG */
1127 addr2 = card->lg_addr;
1128 handle2 = card->lg_handle;
1129 card->lg_addr = 0x00000000;
1130 card->lg_handle = 0x00000000;
1132 else /* (!lg_addr) */
1134 card->lg_addr = addr1;
1135 card->lg_handle = handle1;
1142 if (cb->buf_type == BUF_SM)
1144 if (card->sbfqc >= card->sbnr.max)
1146 skb_unlink((struct sk_buff *) handle1, &card->sbpool.queue);
1147 dev_kfree_skb_any((struct sk_buff *) handle1);
1148 skb_unlink((struct sk_buff *) handle2, &card->sbpool.queue);
1149 dev_kfree_skb_any((struct sk_buff *) handle2);
1155 else /* (buf_type == BUF_LG) */
1157 if (card->lbfqc >= card->lbnr.max)
1159 skb_unlink((struct sk_buff *) handle1, &card->lbpool.queue);
1160 dev_kfree_skb_any((struct sk_buff *) handle1);
1161 skb_unlink((struct sk_buff *) handle2, &card->lbpool.queue);
1162 dev_kfree_skb_any((struct sk_buff *) handle2);
1169 ns_grab_res_lock(card, flags);
1171 while (CMD_BUSY(card));
1172 writel(addr2, card->membase + DR3);
1173 writel(handle2, card->membase + DR2);
1174 writel(addr1, card->membase + DR1);
1175 writel(handle1, card->membase + DR0);
1176 writel(NS_CMD_WRITE_FREEBUFQ | cb->buf_type, card->membase + CMD);
1178 spin_unlock_irqrestore(&card->res_lock, flags);
1180 XPRINTK("nicstar%d: Pushing %s buffers at 0x%x and 0x%x.\n", card->index,
1181 (cb->buf_type == BUF_SM ? "small" : "large"), addr1, addr2);
1184 if (!card->efbie && card->sbfqc >= card->sbnr.min &&
1185 card->lbfqc >= card->lbnr.min)
1188 writel((readl(card->membase + CFG) | NS_CFG_EFBIE), card->membase + CFG);
1196 static irqreturn_t ns_irq_handler(int irq, void *dev_id)
1200 struct atm_dev *dev;
1201 unsigned long flags;
1203 card = (ns_dev *) dev_id;
1207 PRINTK("nicstar%d: NICStAR generated an interrupt\n", card->index);
1209 ns_grab_int_lock(card, flags);
1211 stat_r = readl(card->membase + STAT);
1213 /* Transmit Status Indicator has been written to T. S. Queue */
1214 if (stat_r & NS_STAT_TSIF)
1216 TXPRINTK("nicstar%d: TSI interrupt\n", card->index);
1218 writel(NS_STAT_TSIF, card->membase + STAT);
1221 /* Incomplete CS-PDU has been transmitted */
1222 if (stat_r & NS_STAT_TXICP)
1224 writel(NS_STAT_TXICP, card->membase + STAT);
1225 TXPRINTK("nicstar%d: Incomplete CS-PDU transmitted.\n",
1229 /* Transmit Status Queue 7/8 full */
1230 if (stat_r & NS_STAT_TSQF)
1232 writel(NS_STAT_TSQF, card->membase + STAT);
1233 PRINTK("nicstar%d: TSQ full.\n", card->index);
1237 /* Timer overflow */
1238 if (stat_r & NS_STAT_TMROF)
1240 writel(NS_STAT_TMROF, card->membase + STAT);
1241 PRINTK("nicstar%d: Timer overflow.\n", card->index);
1244 /* PHY device interrupt signal active */
1245 if (stat_r & NS_STAT_PHYI)
1247 writel(NS_STAT_PHYI, card->membase + STAT);
1248 PRINTK("nicstar%d: PHY interrupt.\n", card->index);
1249 if (dev->phy && dev->phy->interrupt) {
1250 dev->phy->interrupt(dev);
1254 /* Small Buffer Queue is full */
1255 if (stat_r & NS_STAT_SFBQF)
1257 writel(NS_STAT_SFBQF, card->membase + STAT);
1258 printk("nicstar%d: Small free buffer queue is full.\n", card->index);
1261 /* Large Buffer Queue is full */
1262 if (stat_r & NS_STAT_LFBQF)
1264 writel(NS_STAT_LFBQF, card->membase + STAT);
1265 printk("nicstar%d: Large free buffer queue is full.\n", card->index);
1268 /* Receive Status Queue is full */
1269 if (stat_r & NS_STAT_RSQF)
1271 writel(NS_STAT_RSQF, card->membase + STAT);
1272 printk("nicstar%d: RSQ full.\n", card->index);
1276 /* Complete CS-PDU received */
1277 if (stat_r & NS_STAT_EOPDU)
1279 RXPRINTK("nicstar%d: End of CS-PDU received.\n", card->index);
1281 writel(NS_STAT_EOPDU, card->membase + STAT);
1284 /* Raw cell received */
1285 if (stat_r & NS_STAT_RAWCF)
1287 writel(NS_STAT_RAWCF, card->membase + STAT);
1289 printk("nicstar%d: Raw cell received and no support yet...\n",
1291 #endif /* RCQ_SUPPORT */
1292 /* NOTE: the following procedure may keep a raw cell pending until the
1293 next interrupt. As this preliminary support is only meant to
1294 avoid buffer leakage, this is not an issue. */
1295 while (readl(card->membase + RAWCT) != card->rawch)
1299 rawcell = (ns_rcqe *) bus_to_virt(card->rawch);
1300 if (ns_rcqe_islast(rawcell))
1302 struct sk_buff *oldbuf;
1304 oldbuf = card->rcbuf;
1305 card->rcbuf = (struct sk_buff *) ns_rcqe_nextbufhandle(rawcell);
1306 card->rawch = (u32) virt_to_bus(card->rcbuf->data);
1307 recycle_rx_buf(card, oldbuf);
1310 card->rawch += NS_RCQE_SIZE;
1314 /* Small buffer queue is empty */
1315 if (stat_r & NS_STAT_SFBQE)
1320 writel(NS_STAT_SFBQE, card->membase + STAT);
1321 printk("nicstar%d: Small free buffer queue empty.\n",
1323 for (i = 0; i < card->sbnr.min; i++)
1325 sb = dev_alloc_skb(NS_SMSKBSIZE);
1328 writel(readl(card->membase + CFG) & ~NS_CFG_EFBIE, card->membase + CFG);
1332 NS_SKB_CB(sb)->buf_type = BUF_SM;
1333 skb_queue_tail(&card->sbpool.queue, sb);
1334 skb_reserve(sb, NS_AAL0_HEADER);
1335 push_rxbufs(card, sb);
1341 /* Large buffer queue empty */
1342 if (stat_r & NS_STAT_LFBQE)
1347 writel(NS_STAT_LFBQE, card->membase + STAT);
1348 printk("nicstar%d: Large free buffer queue empty.\n",
1350 for (i = 0; i < card->lbnr.min; i++)
1352 lb = dev_alloc_skb(NS_LGSKBSIZE);
1355 writel(readl(card->membase + CFG) & ~NS_CFG_EFBIE, card->membase + CFG);
1359 NS_SKB_CB(lb)->buf_type = BUF_LG;
1360 skb_queue_tail(&card->lbpool.queue, lb);
1361 skb_reserve(lb, NS_SMBUFSIZE);
1362 push_rxbufs(card, lb);
1368 /* Receive Status Queue is 7/8 full */
1369 if (stat_r & NS_STAT_RSQAF)
1371 writel(NS_STAT_RSQAF, card->membase + STAT);
1372 RXPRINTK("nicstar%d: RSQ almost full.\n", card->index);
1376 spin_unlock_irqrestore(&card->int_lock, flags);
1377 PRINTK("nicstar%d: end of interrupt service\n", card->index);
1383 static int ns_open(struct atm_vcc *vcc)
1387 unsigned long tmpl, modl;
1388 int tcr, tcra; /* target cell rate, and absolute value */
1389 int n = 0; /* Number of entries in the TST. Initialized to remove
1390 the compiler warning. */
1392 int frscdi = 0; /* Index of the SCD. Initialized to remove the compiler
1393 warning. How I wish compilers were clever enough to
1394 tell which variables can truly be used
1396 int inuse; /* tx or rx vc already in use by another vcc */
1397 short vpi = vcc->vpi;
1400 card = (ns_dev *) vcc->dev->dev_data;
1401 PRINTK("nicstar%d: opening vpi.vci %d.%d \n", card->index, (int) vpi, vci);
1402 if (vcc->qos.aal != ATM_AAL5 && vcc->qos.aal != ATM_AAL0)
1404 PRINTK("nicstar%d: unsupported AAL.\n", card->index);
1408 vc = &(card->vcmap[vpi << card->vcibits | vci]);
1412 if (vcc->qos.txtp.traffic_class != ATM_NONE && vc->tx)
1414 if (vcc->qos.rxtp.traffic_class != ATM_NONE && vc->rx)
1418 printk("nicstar%d: %s vci already in use.\n", card->index,
1419 inuse == 1 ? "tx" : inuse == 2 ? "rx" : "tx and rx");
1423 set_bit(ATM_VF_ADDR,&vcc->flags);
1425 /* NOTE: You are not allowed to modify an open connection's QOS. To change
1426 that, remove the ATM_VF_PARTIAL flag checking. There may be other changes
1427 needed to do that. */
1428 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
1432 set_bit(ATM_VF_PARTIAL,&vcc->flags);
1433 if (vcc->qos.txtp.traffic_class == ATM_CBR)
1435 /* Check requested cell rate and availability of SCD */
1436 if (vcc->qos.txtp.max_pcr == 0 && vcc->qos.txtp.pcr == 0 &&
1437 vcc->qos.txtp.min_pcr == 0)
1439 PRINTK("nicstar%d: trying to open a CBR vc with cell rate = 0 \n",
1441 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1442 clear_bit(ATM_VF_ADDR,&vcc->flags);
1446 tcr = atm_pcr_goal(&(vcc->qos.txtp));
1447 tcra = tcr >= 0 ? tcr : -tcr;
1449 PRINTK("nicstar%d: target cell rate = %d.\n", card->index,
1450 vcc->qos.txtp.max_pcr);
1452 tmpl = (unsigned long)tcra * (unsigned long)NS_TST_NUM_ENTRIES;
1453 modl = tmpl % card->max_pcr;
1455 n = (int)(tmpl / card->max_pcr);
1462 if ((n = (card->tst_free_entries - NS_TST_RESERVED)) <= 0)
1464 PRINTK("nicstar%d: no CBR bandwidth free.\n", card->index);
1465 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1466 clear_bit(ATM_VF_ADDR,&vcc->flags);
1473 printk("nicstar%d: selected bandwidth < granularity.\n", card->index);
1474 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1475 clear_bit(ATM_VF_ADDR,&vcc->flags);
1479 if (n > (card->tst_free_entries - NS_TST_RESERVED))
1481 PRINTK("nicstar%d: not enough free CBR bandwidth.\n", card->index);
1482 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1483 clear_bit(ATM_VF_ADDR,&vcc->flags);
1487 card->tst_free_entries -= n;
1489 XPRINTK("nicstar%d: writing %d tst entries.\n", card->index, n);
1490 for (frscdi = 0; frscdi < NS_FRSCD_NUM; frscdi++)
1492 if (card->scd2vc[frscdi] == NULL)
1494 card->scd2vc[frscdi] = vc;
1498 if (frscdi == NS_FRSCD_NUM)
1500 PRINTK("nicstar%d: no SCD available for CBR channel.\n", card->index);
1501 card->tst_free_entries += n;
1502 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1503 clear_bit(ATM_VF_ADDR,&vcc->flags);
1507 vc->cbr_scd = NS_FRSCD + frscdi * NS_FRSCD_SIZE;
1509 scq = get_scq(CBR_SCQSIZE, vc->cbr_scd);
1512 PRINTK("nicstar%d: can't get fixed rate SCQ.\n", card->index);
1513 card->scd2vc[frscdi] = NULL;
1514 card->tst_free_entries += n;
1515 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1516 clear_bit(ATM_VF_ADDR,&vcc->flags);
1520 u32d[0] = (u32) virt_to_bus(scq->base);
1521 u32d[1] = (u32) 0x00000000;
1522 u32d[2] = (u32) 0xffffffff;
1523 u32d[3] = (u32) 0x00000000;
1524 ns_write_sram(card, vc->cbr_scd, u32d, 4);
1526 fill_tst(card, n, vc);
1528 else if (vcc->qos.txtp.traffic_class == ATM_UBR)
1530 vc->cbr_scd = 0x00000000;
1531 vc->scq = card->scq0;
1534 if (vcc->qos.txtp.traffic_class != ATM_NONE)
1540 if (vcc->qos.rxtp.traffic_class != ATM_NONE)
1548 /* Open the connection in hardware */
1549 if (vcc->qos.aal == ATM_AAL5)
1550 status = NS_RCTE_AAL5 | NS_RCTE_CONNECTOPEN;
1551 else /* vcc->qos.aal == ATM_AAL0 */
1552 status = NS_RCTE_AAL0 | NS_RCTE_CONNECTOPEN;
1554 status |= NS_RCTE_RAWCELLINTEN;
1555 #endif /* RCQ_SUPPORT */
1556 ns_write_sram(card, NS_RCT + (vpi << card->vcibits | vci) *
1557 NS_RCT_ENTRY_SIZE, &status, 1);
1562 set_bit(ATM_VF_READY,&vcc->flags);
1568 static void ns_close(struct atm_vcc *vcc)
1576 card = vcc->dev->dev_data;
1577 PRINTK("nicstar%d: closing vpi.vci %d.%d \n", card->index,
1578 (int) vcc->vpi, vcc->vci);
1580 clear_bit(ATM_VF_READY,&vcc->flags);
1582 if (vcc->qos.rxtp.traffic_class != ATM_NONE)
1585 unsigned long flags;
1587 addr = NS_RCT + (vcc->vpi << card->vcibits | vcc->vci) * NS_RCT_ENTRY_SIZE;
1588 ns_grab_res_lock(card, flags);
1589 while(CMD_BUSY(card));
1590 writel(NS_CMD_CLOSE_CONNECTION | addr << 2, card->membase + CMD);
1591 spin_unlock_irqrestore(&card->res_lock, flags);
1594 if (vc->rx_iov != NULL)
1596 struct sk_buff *iovb;
1599 stat = readl(card->membase + STAT);
1600 card->sbfqc = ns_stat_sfbqc_get(stat);
1601 card->lbfqc = ns_stat_lfbqc_get(stat);
1603 PRINTK("nicstar%d: closing a VC with pending rx buffers.\n",
1606 recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data,
1607 NS_SKB(iovb)->iovcnt);
1608 NS_SKB(iovb)->iovcnt = 0;
1609 NS_SKB(iovb)->vcc = NULL;
1610 ns_grab_int_lock(card, flags);
1611 recycle_iov_buf(card, iovb);
1612 spin_unlock_irqrestore(&card->int_lock, flags);
1617 if (vcc->qos.txtp.traffic_class != ATM_NONE)
1622 if (vcc->qos.txtp.traffic_class == ATM_CBR)
1624 unsigned long flags;
1632 ns_grab_scq_lock(card, scq, flags);
1634 if (scqep == scq->base)
1638 if (scqep == scq->tail)
1640 spin_unlock_irqrestore(&scq->lock, flags);
1643 /* If the last entry is not a TSR, place one in the SCQ in order to
1644 be able to completely drain it and then close. */
1645 if (!ns_scqe_is_tsr(scqep) && scq->tail != scq->next)
1652 tsr.word_1 = ns_tsr_mkword_1(NS_TSR_INTENABLE);
1653 scdi = (vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE;
1654 scqi = scq->next - scq->base;
1655 tsr.word_2 = ns_tsr_mkword_2(scdi, scqi);
1656 tsr.word_3 = 0x00000000;
1657 tsr.word_4 = 0x00000000;
1660 scq->skb[index] = NULL;
1661 if (scq->next == scq->last)
1662 scq->next = scq->base;
1665 data = (u32) virt_to_bus(scq->next);
1666 ns_write_sram(card, scq->scd, &data, 1);
1668 spin_unlock_irqrestore(&scq->lock, flags);
1672 /* Free all TST entries */
1673 data = NS_TST_OPCODE_VARIABLE;
1674 for (i = 0; i < NS_TST_NUM_ENTRIES; i++)
1676 if (card->tste2vc[i] == vc)
1678 ns_write_sram(card, card->tst_addr + i, &data, 1);
1679 card->tste2vc[i] = NULL;
1680 card->tst_free_entries++;
1684 card->scd2vc[(vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE] = NULL;
1685 free_scq(vc->scq, vcc);
1688 /* remove all references to vcc before deleting it */
1689 if (vcc->qos.txtp.traffic_class != ATM_NONE)
1691 unsigned long flags;
1692 scq_info *scq = card->scq0;
1694 ns_grab_scq_lock(card, scq, flags);
1696 for(i = 0; i < scq->num_entries; i++) {
1697 if(scq->skb[i] && ATM_SKB(scq->skb[i])->vcc == vcc) {
1698 ATM_SKB(scq->skb[i])->vcc = NULL;
1699 atm_return(vcc, scq->skb[i]->truesize);
1700 PRINTK("nicstar: deleted pending vcc mapping\n");
1704 spin_unlock_irqrestore(&scq->lock, flags);
1707 vcc->dev_data = NULL;
1708 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1709 clear_bit(ATM_VF_ADDR,&vcc->flags);
1714 stat = readl(card->membase + STAT);
1715 cfg = readl(card->membase + CFG);
1716 printk("STAT = 0x%08X CFG = 0x%08X \n", stat, cfg);
1717 printk("TSQ: base = 0x%08X next = 0x%08X last = 0x%08X TSQT = 0x%08X \n",
1718 (u32) card->tsq.base, (u32) card->tsq.next,(u32) card->tsq.last,
1719 readl(card->membase + TSQT));
1720 printk("RSQ: base = 0x%08X next = 0x%08X last = 0x%08X RSQT = 0x%08X \n",
1721 (u32) card->rsq.base, (u32) card->rsq.next,(u32) card->rsq.last,
1722 readl(card->membase + RSQT));
1723 printk("Empty free buffer queue interrupt %s \n",
1724 card->efbie ? "enabled" : "disabled");
1725 printk("SBCNT = %d count = %d LBCNT = %d count = %d \n",
1726 ns_stat_sfbqc_get(stat), card->sbpool.count,
1727 ns_stat_lfbqc_get(stat), card->lbpool.count);
1728 printk("hbpool.count = %d iovpool.count = %d \n",
1729 card->hbpool.count, card->iovpool.count);
1731 #endif /* RX_DEBUG */
1736 static void fill_tst(ns_dev *card, int n, vc_map *vc)
1743 /* It would be very complicated to keep the two TSTs synchronized while
1744 assuring that writes are only made to the inactive TST. So, for now I
1745 will use only one TST. If problems occur, I will change this again */
1747 new_tst = card->tst_addr;
1749 /* Fill procedure */
1751 for (e = 0; e < NS_TST_NUM_ENTRIES; e++)
1753 if (card->tste2vc[e] == NULL)
1756 if (e == NS_TST_NUM_ENTRIES) {
1757 printk("nicstar%d: No free TST entries found. \n", card->index);
1762 cl = NS_TST_NUM_ENTRIES;
1763 data = ns_tste_make(NS_TST_OPCODE_FIXED, vc->cbr_scd);
1767 if (cl >= NS_TST_NUM_ENTRIES && card->tste2vc[e] == NULL)
1769 card->tste2vc[e] = vc;
1770 ns_write_sram(card, new_tst + e, &data, 1);
1771 cl -= NS_TST_NUM_ENTRIES;
1775 if (++e == NS_TST_NUM_ENTRIES) {
1781 /* End of fill procedure */
1783 data = ns_tste_make(NS_TST_OPCODE_END, new_tst);
1784 ns_write_sram(card, new_tst + NS_TST_NUM_ENTRIES, &data, 1);
1785 ns_write_sram(card, card->tst_addr + NS_TST_NUM_ENTRIES, &data, 1);
1786 card->tst_addr = new_tst;
1791 static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb)
1796 unsigned long buflen;
1798 u32 flags; /* TBD flags, not CPU flags */
1800 card = vcc->dev->dev_data;
1801 TXPRINTK("nicstar%d: ns_send() called.\n", card->index);
1802 if ((vc = (vc_map *) vcc->dev_data) == NULL)
1804 printk("nicstar%d: vcc->dev_data == NULL on ns_send().\n", card->index);
1805 atomic_inc(&vcc->stats->tx_err);
1806 dev_kfree_skb_any(skb);
1812 printk("nicstar%d: Trying to transmit on a non-tx VC.\n", card->index);
1813 atomic_inc(&vcc->stats->tx_err);
1814 dev_kfree_skb_any(skb);
1818 if (vcc->qos.aal != ATM_AAL5 && vcc->qos.aal != ATM_AAL0)
1820 printk("nicstar%d: Only AAL0 and AAL5 are supported.\n", card->index);
1821 atomic_inc(&vcc->stats->tx_err);
1822 dev_kfree_skb_any(skb);
1826 if (skb_shinfo(skb)->nr_frags != 0)
1828 printk("nicstar%d: No scatter-gather yet.\n", card->index);
1829 atomic_inc(&vcc->stats->tx_err);
1830 dev_kfree_skb_any(skb);
1834 ATM_SKB(skb)->vcc = vcc;
1836 if (vcc->qos.aal == ATM_AAL5)
1838 buflen = (skb->len + 47 + 8) / 48 * 48; /* Multiple of 48 */
1839 flags = NS_TBD_AAL5;
1840 scqe.word_2 = cpu_to_le32((u32) virt_to_bus(skb->data));
1841 scqe.word_3 = cpu_to_le32((u32) skb->len);
1842 scqe.word_4 = ns_tbd_mkword_4(0, (u32) vcc->vpi, (u32) vcc->vci, 0,
1843 ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? 1 : 0);
1844 flags |= NS_TBD_EOPDU;
1846 else /* (vcc->qos.aal == ATM_AAL0) */
1848 buflen = ATM_CELL_PAYLOAD; /* i.e., 48 bytes */
1849 flags = NS_TBD_AAL0;
1850 scqe.word_2 = cpu_to_le32((u32) virt_to_bus(skb->data) + NS_AAL0_HEADER);
1851 scqe.word_3 = cpu_to_le32(0x00000000);
1852 if (*skb->data & 0x02) /* Payload type 1 - end of pdu */
1853 flags |= NS_TBD_EOPDU;
1854 scqe.word_4 = cpu_to_le32(*((u32 *) skb->data) & ~NS_TBD_VC_MASK);
1855 /* Force the VPI/VCI to be the same as in VCC struct */
1856 scqe.word_4 |= cpu_to_le32((((u32) vcc->vpi) << NS_TBD_VPI_SHIFT |
1857 ((u32) vcc->vci) << NS_TBD_VCI_SHIFT) &
1861 if (vcc->qos.txtp.traffic_class == ATM_CBR)
1863 scqe.word_1 = ns_tbd_mkword_1_novbr(flags, (u32) buflen);
1864 scq = ((vc_map *) vcc->dev_data)->scq;
1868 scqe.word_1 = ns_tbd_mkword_1(flags, (u32) 1, (u32) 1, (u32) buflen);
1872 if (push_scqe(card, vc, scq, &scqe, skb) != 0)
1874 atomic_inc(&vcc->stats->tx_err);
1875 dev_kfree_skb_any(skb);
1878 atomic_inc(&vcc->stats->tx);
1885 static int push_scqe(ns_dev *card, vc_map *vc, scq_info *scq, ns_scqe *tbd,
1886 struct sk_buff *skb)
1888 unsigned long flags;
1895 ns_grab_scq_lock(card, scq, flags);
1896 while (scq->tail == scq->next)
1898 if (in_interrupt()) {
1899 spin_unlock_irqrestore(&scq->lock, flags);
1900 printk("nicstar%d: Error pushing TBD.\n", card->index);
1905 spin_unlock_irqrestore(&scq->lock, flags);
1906 interruptible_sleep_on_timeout(&scq->scqfull_waitq, SCQFULL_TIMEOUT);
1907 ns_grab_scq_lock(card, scq, flags);
1910 spin_unlock_irqrestore(&scq->lock, flags);
1911 printk("nicstar%d: Timeout pushing TBD.\n", card->index);
1916 index = (int) (scq->next - scq->base);
1917 scq->skb[index] = skb;
1918 XPRINTK("nicstar%d: sending skb at 0x%x (pos %d).\n",
1919 card->index, (u32) skb, index);
1920 XPRINTK("nicstar%d: TBD written:\n0x%x\n0x%x\n0x%x\n0x%x\n at 0x%x.\n",
1921 card->index, le32_to_cpu(tbd->word_1), le32_to_cpu(tbd->word_2),
1922 le32_to_cpu(tbd->word_3), le32_to_cpu(tbd->word_4),
1924 if (scq->next == scq->last)
1925 scq->next = scq->base;
1930 if (scq->num_entries == VBR_SCQ_NUM_ENTRIES)
1938 if (vc->tbd_count >= MAX_TBD_PER_VC || scq->tbd_count >= MAX_TBD_PER_SCQ)
1942 while (scq->tail == scq->next)
1944 if (in_interrupt()) {
1945 data = (u32) virt_to_bus(scq->next);
1946 ns_write_sram(card, scq->scd, &data, 1);
1947 spin_unlock_irqrestore(&scq->lock, flags);
1948 printk("nicstar%d: Error pushing TSR.\n", card->index);
1953 if (has_run++) break;
1954 spin_unlock_irqrestore(&scq->lock, flags);
1955 interruptible_sleep_on_timeout(&scq->scqfull_waitq, SCQFULL_TIMEOUT);
1956 ns_grab_scq_lock(card, scq, flags);
1961 tsr.word_1 = ns_tsr_mkword_1(NS_TSR_INTENABLE);
1963 scdi = NS_TSR_SCDISVBR;
1965 scdi = (vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE;
1966 scqi = scq->next - scq->base;
1967 tsr.word_2 = ns_tsr_mkword_2(scdi, scqi);
1968 tsr.word_3 = 0x00000000;
1969 tsr.word_4 = 0x00000000;
1973 scq->skb[index] = NULL;
1974 XPRINTK("nicstar%d: TSR written:\n0x%x\n0x%x\n0x%x\n0x%x\n at 0x%x.\n",
1975 card->index, le32_to_cpu(tsr.word_1), le32_to_cpu(tsr.word_2),
1976 le32_to_cpu(tsr.word_3), le32_to_cpu(tsr.word_4),
1978 if (scq->next == scq->last)
1979 scq->next = scq->base;
1986 PRINTK("nicstar%d: Timeout pushing TSR.\n", card->index);
1988 data = (u32) virt_to_bus(scq->next);
1989 ns_write_sram(card, scq->scd, &data, 1);
1991 spin_unlock_irqrestore(&scq->lock, flags);
1998 static void process_tsq(ns_dev *card)
2002 ns_tsi *previous = NULL, *one_ahead, *two_ahead;
2003 int serviced_entries; /* flag indicating at least on entry was serviced */
2005 serviced_entries = 0;
2007 if (card->tsq.next == card->tsq.last)
2008 one_ahead = card->tsq.base;
2010 one_ahead = card->tsq.next + 1;
2012 if (one_ahead == card->tsq.last)
2013 two_ahead = card->tsq.base;
2015 two_ahead = one_ahead + 1;
2017 while (!ns_tsi_isempty(card->tsq.next) || !ns_tsi_isempty(one_ahead) ||
2018 !ns_tsi_isempty(two_ahead))
2019 /* At most two empty, as stated in the 77201 errata */
2021 serviced_entries = 1;
2023 /* Skip the one or two possible empty entries */
2024 while (ns_tsi_isempty(card->tsq.next)) {
2025 if (card->tsq.next == card->tsq.last)
2026 card->tsq.next = card->tsq.base;
2031 if (!ns_tsi_tmrof(card->tsq.next))
2033 scdi = ns_tsi_getscdindex(card->tsq.next);
2034 if (scdi == NS_TSI_SCDISVBR)
2038 if (card->scd2vc[scdi] == NULL)
2040 printk("nicstar%d: could not find VC from SCD index.\n",
2042 ns_tsi_init(card->tsq.next);
2045 scq = card->scd2vc[scdi]->scq;
2047 drain_scq(card, scq, ns_tsi_getscqpos(card->tsq.next));
2049 wake_up_interruptible(&(scq->scqfull_waitq));
2052 ns_tsi_init(card->tsq.next);
2053 previous = card->tsq.next;
2054 if (card->tsq.next == card->tsq.last)
2055 card->tsq.next = card->tsq.base;
2059 if (card->tsq.next == card->tsq.last)
2060 one_ahead = card->tsq.base;
2062 one_ahead = card->tsq.next + 1;
2064 if (one_ahead == card->tsq.last)
2065 two_ahead = card->tsq.base;
2067 two_ahead = one_ahead + 1;
2070 if (serviced_entries) {
2071 writel((((u32) previous) - ((u32) card->tsq.base)),
2072 card->membase + TSQH);
2078 static void drain_scq(ns_dev *card, scq_info *scq, int pos)
2080 struct atm_vcc *vcc;
2081 struct sk_buff *skb;
2083 unsigned long flags;
2085 XPRINTK("nicstar%d: drain_scq() called, scq at 0x%x, pos %d.\n",
2086 card->index, (u32) scq, pos);
2087 if (pos >= scq->num_entries)
2089 printk("nicstar%d: Bad index on drain_scq().\n", card->index);
2093 ns_grab_scq_lock(card, scq, flags);
2094 i = (int) (scq->tail - scq->base);
2095 if (++i == scq->num_entries)
2100 XPRINTK("nicstar%d: freeing skb at 0x%x (index %d).\n",
2101 card->index, (u32) skb, i);
2104 vcc = ATM_SKB(skb)->vcc;
2105 if (vcc && vcc->pop != NULL) {
2108 dev_kfree_skb_irq(skb);
2112 if (++i == scq->num_entries)
2115 scq->tail = scq->base + pos;
2116 spin_unlock_irqrestore(&scq->lock, flags);
2121 static void process_rsq(ns_dev *card)
2125 if (!ns_rsqe_valid(card->rsq.next))
2128 dequeue_rx(card, card->rsq.next);
2129 ns_rsqe_init(card->rsq.next);
2130 previous = card->rsq.next;
2131 if (card->rsq.next == card->rsq.last)
2132 card->rsq.next = card->rsq.base;
2135 } while (ns_rsqe_valid(card->rsq.next));
2136 writel((((u32) previous) - ((u32) card->rsq.base)),
2137 card->membase + RSQH);
2142 static void dequeue_rx(ns_dev *card, ns_rsqe *rsqe)
2146 struct sk_buff *iovb;
2148 struct atm_vcc *vcc;
2149 struct sk_buff *skb;
2150 unsigned short aal5_len;
2154 stat = readl(card->membase + STAT);
2155 card->sbfqc = ns_stat_sfbqc_get(stat);
2156 card->lbfqc = ns_stat_lfbqc_get(stat);
2158 skb = (struct sk_buff *) le32_to_cpu(rsqe->buffer_handle);
2159 vpi = ns_rsqe_vpi(rsqe);
2160 vci = ns_rsqe_vci(rsqe);
2161 if (vpi >= 1UL << card->vpibits || vci >= 1UL << card->vcibits)
2163 printk("nicstar%d: SDU received for out-of-range vc %d.%d.\n",
2164 card->index, vpi, vci);
2165 recycle_rx_buf(card, skb);
2169 vc = &(card->vcmap[vpi << card->vcibits | vci]);
2172 RXPRINTK("nicstar%d: SDU received on non-rx vc %d.%d.\n",
2173 card->index, vpi, vci);
2174 recycle_rx_buf(card, skb);
2180 if (vcc->qos.aal == ATM_AAL0)
2183 unsigned char *cell;
2187 for (i = ns_rsqe_cellcount(rsqe); i; i--)
2189 if ((sb = dev_alloc_skb(NS_SMSKBSIZE)) == NULL)
2191 printk("nicstar%d: Can't allocate buffers for aal0.\n",
2193 atomic_add(i,&vcc->stats->rx_drop);
2196 if (!atm_charge(vcc, sb->truesize))
2198 RXPRINTK("nicstar%d: atm_charge() dropped aal0 packets.\n",
2200 atomic_add(i-1,&vcc->stats->rx_drop); /* already increased by 1 */
2201 dev_kfree_skb_any(sb);
2204 /* Rebuild the header */
2205 *((u32 *) sb->data) = le32_to_cpu(rsqe->word_1) << 4 |
2206 (ns_rsqe_clp(rsqe) ? 0x00000001 : 0x00000000);
2207 if (i == 1 && ns_rsqe_eopdu(rsqe))
2208 *((u32 *) sb->data) |= 0x00000002;
2209 skb_put(sb, NS_AAL0_HEADER);
2210 memcpy(skb_tail_pointer(sb), cell, ATM_CELL_PAYLOAD);
2211 skb_put(sb, ATM_CELL_PAYLOAD);
2212 ATM_SKB(sb)->vcc = vcc;
2213 __net_timestamp(sb);
2215 atomic_inc(&vcc->stats->rx);
2216 cell += ATM_CELL_PAYLOAD;
2219 recycle_rx_buf(card, skb);
2223 /* To reach this point, the AAL layer can only be AAL5 */
2225 if ((iovb = vc->rx_iov) == NULL)
2227 iovb = skb_dequeue(&(card->iovpool.queue));
2228 if (iovb == NULL) /* No buffers in the queue */
2230 iovb = alloc_skb(NS_IOVBUFSIZE, GFP_ATOMIC);
2233 printk("nicstar%d: Out of iovec buffers.\n", card->index);
2234 atomic_inc(&vcc->stats->rx_drop);
2235 recycle_rx_buf(card, skb);
2238 NS_SKB_CB(iovb)->buf_type = BUF_NONE;
2241 if (--card->iovpool.count < card->iovnr.min)
2243 struct sk_buff *new_iovb;
2244 if ((new_iovb = alloc_skb(NS_IOVBUFSIZE, GFP_ATOMIC)) != NULL)
2246 NS_SKB_CB(iovb)->buf_type = BUF_NONE;
2247 skb_queue_tail(&card->iovpool.queue, new_iovb);
2248 card->iovpool.count++;
2252 NS_SKB(iovb)->iovcnt = 0;
2254 iovb->data = iovb->head;
2255 skb_reset_tail_pointer(iovb);
2256 NS_SKB(iovb)->vcc = vcc;
2257 /* IMPORTANT: a pointer to the sk_buff containing the small or large
2258 buffer is stored as iovec base, NOT a pointer to the
2259 small or large buffer itself. */
2261 else if (NS_SKB(iovb)->iovcnt >= NS_MAX_IOVECS)
2263 printk("nicstar%d: received too big AAL5 SDU.\n", card->index);
2264 atomic_inc(&vcc->stats->rx_err);
2265 recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data, NS_MAX_IOVECS);
2266 NS_SKB(iovb)->iovcnt = 0;
2268 iovb->data = iovb->head;
2269 skb_reset_tail_pointer(iovb);
2270 NS_SKB(iovb)->vcc = vcc;
2272 iov = &((struct iovec *) iovb->data)[NS_SKB(iovb)->iovcnt++];
2273 iov->iov_base = (void *) skb;
2274 iov->iov_len = ns_rsqe_cellcount(rsqe) * 48;
2275 iovb->len += iov->iov_len;
2277 if (NS_SKB(iovb)->iovcnt == 1)
2279 if (NS_SKB_CB(skb)->buf_type != BUF_SM)
2281 printk("nicstar%d: Expected a small buffer, and this is not one.\n",
2283 which_list(card, skb);
2284 atomic_inc(&vcc->stats->rx_err);
2285 recycle_rx_buf(card, skb);
2287 recycle_iov_buf(card, iovb);
2291 else /* NS_SKB(iovb)->iovcnt >= 2 */
2293 if (NS_SKB_CB(skb)->buf_type != BUF_LG)
2295 printk("nicstar%d: Expected a large buffer, and this is not one.\n",
2297 which_list(card, skb);
2298 atomic_inc(&vcc->stats->rx_err);
2299 recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data,
2300 NS_SKB(iovb)->iovcnt);
2302 recycle_iov_buf(card, iovb);
2307 if (ns_rsqe_eopdu(rsqe))
2309 /* This works correctly regardless of the endianness of the host */
2310 unsigned char *L1L2 = (unsigned char *)((u32)skb->data +
2312 aal5_len = L1L2[0] << 8 | L1L2[1];
2313 len = (aal5_len == 0x0000) ? 0x10000 : aal5_len;
2314 if (ns_rsqe_crcerr(rsqe) ||
2315 len + 8 > iovb->len || len + (47 + 8) < iovb->len)
2317 printk("nicstar%d: AAL5 CRC error", card->index);
2318 if (len + 8 > iovb->len || len + (47 + 8) < iovb->len)
2319 printk(" - PDU size mismatch.\n");
2322 atomic_inc(&vcc->stats->rx_err);
2323 recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data,
2324 NS_SKB(iovb)->iovcnt);
2326 recycle_iov_buf(card, iovb);
2330 /* By this point we (hopefully) have a complete SDU without errors. */
2332 if (NS_SKB(iovb)->iovcnt == 1) /* Just a small buffer */
2334 /* skb points to a small buffer */
2335 if (!atm_charge(vcc, skb->truesize))
2337 push_rxbufs(card, skb);
2338 atomic_inc(&vcc->stats->rx_drop);
2343 dequeue_sm_buf(card, skb);
2344 #ifdef NS_USE_DESTRUCTORS
2345 skb->destructor = ns_sb_destructor;
2346 #endif /* NS_USE_DESTRUCTORS */
2347 ATM_SKB(skb)->vcc = vcc;
2348 __net_timestamp(skb);
2349 vcc->push(vcc, skb);
2350 atomic_inc(&vcc->stats->rx);
2353 else if (NS_SKB(iovb)->iovcnt == 2) /* One small plus one large buffer */
2357 sb = (struct sk_buff *) (iov - 1)->iov_base;
2358 /* skb points to a large buffer */
2360 if (len <= NS_SMBUFSIZE)
2362 if (!atm_charge(vcc, sb->truesize))
2364 push_rxbufs(card, sb);
2365 atomic_inc(&vcc->stats->rx_drop);
2370 dequeue_sm_buf(card, sb);
2371 #ifdef NS_USE_DESTRUCTORS
2372 sb->destructor = ns_sb_destructor;
2373 #endif /* NS_USE_DESTRUCTORS */
2374 ATM_SKB(sb)->vcc = vcc;
2375 __net_timestamp(sb);
2377 atomic_inc(&vcc->stats->rx);
2380 push_rxbufs(card, skb);
2383 else /* len > NS_SMBUFSIZE, the usual case */
2385 if (!atm_charge(vcc, skb->truesize))
2387 push_rxbufs(card, skb);
2388 atomic_inc(&vcc->stats->rx_drop);
2392 dequeue_lg_buf(card, skb);
2393 #ifdef NS_USE_DESTRUCTORS
2394 skb->destructor = ns_lb_destructor;
2395 #endif /* NS_USE_DESTRUCTORS */
2396 skb_push(skb, NS_SMBUFSIZE);
2397 skb_copy_from_linear_data(sb, skb->data, NS_SMBUFSIZE);
2398 skb_put(skb, len - NS_SMBUFSIZE);
2399 ATM_SKB(skb)->vcc = vcc;
2400 __net_timestamp(skb);
2401 vcc->push(vcc, skb);
2402 atomic_inc(&vcc->stats->rx);
2405 push_rxbufs(card, sb);
2410 else /* Must push a huge buffer */
2412 struct sk_buff *hb, *sb, *lb;
2413 int remaining, tocopy;
2416 hb = skb_dequeue(&(card->hbpool.queue));
2417 if (hb == NULL) /* No buffers in the queue */
2420 hb = dev_alloc_skb(NS_HBUFSIZE);
2423 printk("nicstar%d: Out of huge buffers.\n", card->index);
2424 atomic_inc(&vcc->stats->rx_drop);
2425 recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data,
2426 NS_SKB(iovb)->iovcnt);
2428 recycle_iov_buf(card, iovb);
2431 else if (card->hbpool.count < card->hbnr.min)
2433 struct sk_buff *new_hb;
2434 if ((new_hb = dev_alloc_skb(NS_HBUFSIZE)) != NULL)
2436 skb_queue_tail(&card->hbpool.queue, new_hb);
2437 card->hbpool.count++;
2440 NS_SKB_CB(hb)->buf_type = BUF_NONE;
2443 if (--card->hbpool.count < card->hbnr.min)
2445 struct sk_buff *new_hb;
2446 if ((new_hb = dev_alloc_skb(NS_HBUFSIZE)) != NULL)
2448 NS_SKB_CB(new_hb)->buf_type = BUF_NONE;
2449 skb_queue_tail(&card->hbpool.queue, new_hb);
2450 card->hbpool.count++;
2452 if (card->hbpool.count < card->hbnr.min)
2454 if ((new_hb = dev_alloc_skb(NS_HBUFSIZE)) != NULL)
2456 NS_SKB_CB(new_hb)->buf_type = BUF_NONE;
2457 skb_queue_tail(&card->hbpool.queue, new_hb);
2458 card->hbpool.count++;
2463 iov = (struct iovec *) iovb->data;
2465 if (!atm_charge(vcc, hb->truesize))
2467 recycle_iovec_rx_bufs(card, iov, NS_SKB(iovb)->iovcnt);
2468 if (card->hbpool.count < card->hbnr.max)
2470 skb_queue_tail(&card->hbpool.queue, hb);
2471 card->hbpool.count++;
2474 dev_kfree_skb_any(hb);
2475 atomic_inc(&vcc->stats->rx_drop);
2479 /* Copy the small buffer to the huge buffer */
2480 sb = (struct sk_buff *) iov->iov_base;
2481 skb_copy_from_linear_data(sb, hb->data, iov->iov_len);
2482 skb_put(hb, iov->iov_len);
2483 remaining = len - iov->iov_len;
2485 /* Free the small buffer */
2486 push_rxbufs(card, sb);
2488 /* Copy all large buffers to the huge buffer and free them */
2489 for (j = 1; j < NS_SKB(iovb)->iovcnt; j++)
2491 lb = (struct sk_buff *) iov->iov_base;
2492 tocopy = min_t(int, remaining, iov->iov_len);
2493 skb_copy_from_linear_data(lb, skb_tail_pointer(hb), tocopy);
2494 skb_put(hb, tocopy);
2496 remaining -= tocopy;
2497 push_rxbufs(card, lb);
2500 if (remaining != 0 || hb->len != len)
2501 printk("nicstar%d: Huge buffer len mismatch.\n", card->index);
2502 #endif /* EXTRA_DEBUG */
2503 ATM_SKB(hb)->vcc = vcc;
2504 #ifdef NS_USE_DESTRUCTORS
2505 hb->destructor = ns_hb_destructor;
2506 #endif /* NS_USE_DESTRUCTORS */
2507 __net_timestamp(hb);
2509 atomic_inc(&vcc->stats->rx);
2514 recycle_iov_buf(card, iovb);
2521 #ifdef NS_USE_DESTRUCTORS
2523 static void ns_sb_destructor(struct sk_buff *sb)
2528 card = (ns_dev *) ATM_SKB(sb)->vcc->dev->dev_data;
2529 stat = readl(card->membase + STAT);
2530 card->sbfqc = ns_stat_sfbqc_get(stat);
2531 card->lbfqc = ns_stat_lfbqc_get(stat);
2535 sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
2538 NS_SKB_CB(sb)->buf_type = BUF_SM;
2539 skb_queue_tail(&card->sbpool.queue, sb);
2540 skb_reserve(sb, NS_AAL0_HEADER);
2541 push_rxbufs(card, sb);
2542 } while (card->sbfqc < card->sbnr.min);
2547 static void ns_lb_destructor(struct sk_buff *lb)
2552 card = (ns_dev *) ATM_SKB(lb)->vcc->dev->dev_data;
2553 stat = readl(card->membase + STAT);
2554 card->sbfqc = ns_stat_sfbqc_get(stat);
2555 card->lbfqc = ns_stat_lfbqc_get(stat);
2559 lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
2562 NS_SKB_CB(lb)->buf_type = BUF_LG;
2563 skb_queue_tail(&card->lbpool.queue, lb);
2564 skb_reserve(lb, NS_SMBUFSIZE);
2565 push_rxbufs(card, lb);
2566 } while (card->lbfqc < card->lbnr.min);
2571 static void ns_hb_destructor(struct sk_buff *hb)
2575 card = (ns_dev *) ATM_SKB(hb)->vcc->dev->dev_data;
2577 while (card->hbpool.count < card->hbnr.init)
2579 hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
2582 NS_SKB_CB(hb)->buf_type = BUF_NONE;
2583 skb_queue_tail(&card->hbpool.queue, hb);
2584 card->hbpool.count++;
2588 #endif /* NS_USE_DESTRUCTORS */
2591 static void recycle_rx_buf(ns_dev *card, struct sk_buff *skb)
2593 struct ns_skb_cb *cb = NS_SKB_CB(skb);
2595 if (unlikely(cb->buf_type == BUF_NONE)) {
2596 printk("nicstar%d: What kind of rx buffer is this?\n", card->index);
2597 dev_kfree_skb_any(skb);
2599 push_rxbufs(card, skb);
2603 static void recycle_iovec_rx_bufs(ns_dev *card, struct iovec *iov, int count)
2606 recycle_rx_buf(card, (struct sk_buff *) (iov++)->iov_base);
2610 static void recycle_iov_buf(ns_dev *card, struct sk_buff *iovb)
2612 if (card->iovpool.count < card->iovnr.max)
2614 skb_queue_tail(&card->iovpool.queue, iovb);
2615 card->iovpool.count++;
2618 dev_kfree_skb_any(iovb);
2623 static void dequeue_sm_buf(ns_dev *card, struct sk_buff *sb)
2625 skb_unlink(sb, &card->sbpool.queue);
2626 #ifdef NS_USE_DESTRUCTORS
2627 if (card->sbfqc < card->sbnr.min)
2629 if (card->sbfqc < card->sbnr.init)
2631 struct sk_buff *new_sb;
2632 if ((new_sb = dev_alloc_skb(NS_SMSKBSIZE)) != NULL)
2634 NS_SKB_CB(new_sb)->buf_type = BUF_SM;
2635 skb_queue_tail(&card->sbpool.queue, new_sb);
2636 skb_reserve(new_sb, NS_AAL0_HEADER);
2637 push_rxbufs(card, new_sb);
2640 if (card->sbfqc < card->sbnr.init)
2641 #endif /* NS_USE_DESTRUCTORS */
2643 struct sk_buff *new_sb;
2644 if ((new_sb = dev_alloc_skb(NS_SMSKBSIZE)) != NULL)
2646 NS_SKB_CB(new_sb)->buf_type = BUF_SM;
2647 skb_queue_tail(&card->sbpool.queue, new_sb);
2648 skb_reserve(new_sb, NS_AAL0_HEADER);
2649 push_rxbufs(card, new_sb);
2656 static void dequeue_lg_buf(ns_dev *card, struct sk_buff *lb)
2658 skb_unlink(lb, &card->lbpool.queue);
2659 #ifdef NS_USE_DESTRUCTORS
2660 if (card->lbfqc < card->lbnr.min)
2662 if (card->lbfqc < card->lbnr.init)
2664 struct sk_buff *new_lb;
2665 if ((new_lb = dev_alloc_skb(NS_LGSKBSIZE)) != NULL)
2667 NS_SKB_CB(new_lb)->buf_type = BUF_LG;
2668 skb_queue_tail(&card->lbpool.queue, new_lb);
2669 skb_reserve(new_lb, NS_SMBUFSIZE);
2670 push_rxbufs(card, new_lb);
2673 if (card->lbfqc < card->lbnr.init)
2674 #endif /* NS_USE_DESTRUCTORS */
2676 struct sk_buff *new_lb;
2677 if ((new_lb = dev_alloc_skb(NS_LGSKBSIZE)) != NULL)
2679 NS_SKB_CB(new_lb)->buf_type = BUF_LG;
2680 skb_queue_tail(&card->lbpool.queue, new_lb);
2681 skb_reserve(new_lb, NS_SMBUFSIZE);
2682 push_rxbufs(card, new_lb);
2689 static int ns_proc_read(struct atm_dev *dev, loff_t *pos, char *page)
2696 card = (ns_dev *) dev->dev_data;
2697 stat = readl(card->membase + STAT);
2699 return sprintf(page, "Pool count min init max \n");
2701 return sprintf(page, "Small %5d %5d %5d %5d \n",
2702 ns_stat_sfbqc_get(stat), card->sbnr.min, card->sbnr.init,
2705 return sprintf(page, "Large %5d %5d %5d %5d \n",
2706 ns_stat_lfbqc_get(stat), card->lbnr.min, card->lbnr.init,
2709 return sprintf(page, "Huge %5d %5d %5d %5d \n", card->hbpool.count,
2710 card->hbnr.min, card->hbnr.init, card->hbnr.max);
2712 return sprintf(page, "Iovec %5d %5d %5d %5d \n", card->iovpool.count,
2713 card->iovnr.min, card->iovnr.init, card->iovnr.max);
2717 retval = sprintf(page, "Interrupt counter: %u \n", card->intcnt);
2722 /* Dump 25.6 Mbps PHY registers */
2723 /* Now there's a 25.6 Mbps PHY driver this code isn't needed. I left it
2724 here just in case it's needed for debugging. */
2725 if (card->max_pcr == ATM_25_PCR && !left--)
2730 for (i = 0; i < 4; i++)
2732 while (CMD_BUSY(card));
2733 writel(NS_CMD_READ_UTILITY | 0x00000200 | i, card->membase + CMD);
2734 while (CMD_BUSY(card));
2735 phy_regs[i] = readl(card->membase + DR0) & 0x000000FF;
2738 return sprintf(page, "PHY regs: 0x%02X 0x%02X 0x%02X 0x%02X \n",
2739 phy_regs[0], phy_regs[1], phy_regs[2], phy_regs[3]);
2741 #endif /* 0 - Dump 25.6 Mbps PHY registers */
2744 if (left-- < NS_TST_NUM_ENTRIES)
2746 if (card->tste2vc[left + 1] == NULL)
2747 return sprintf(page, "%5d - VBR/UBR \n", left + 1);
2749 return sprintf(page, "%5d - %d %d \n", left + 1,
2750 card->tste2vc[left + 1]->tx_vcc->vpi,
2751 card->tste2vc[left + 1]->tx_vcc->vci);
2759 static int ns_ioctl(struct atm_dev *dev, unsigned int cmd, void __user *arg)
2764 unsigned long flags;
2766 card = dev->dev_data;
2770 if (get_user(pl.buftype, &((pool_levels __user *) arg)->buftype))
2774 case NS_BUFTYPE_SMALL:
2775 pl.count = ns_stat_sfbqc_get(readl(card->membase + STAT));
2776 pl.level.min = card->sbnr.min;
2777 pl.level.init = card->sbnr.init;
2778 pl.level.max = card->sbnr.max;
2781 case NS_BUFTYPE_LARGE:
2782 pl.count = ns_stat_lfbqc_get(readl(card->membase + STAT));
2783 pl.level.min = card->lbnr.min;
2784 pl.level.init = card->lbnr.init;
2785 pl.level.max = card->lbnr.max;
2788 case NS_BUFTYPE_HUGE:
2789 pl.count = card->hbpool.count;
2790 pl.level.min = card->hbnr.min;
2791 pl.level.init = card->hbnr.init;
2792 pl.level.max = card->hbnr.max;
2795 case NS_BUFTYPE_IOVEC:
2796 pl.count = card->iovpool.count;
2797 pl.level.min = card->iovnr.min;
2798 pl.level.init = card->iovnr.init;
2799 pl.level.max = card->iovnr.max;
2803 return -ENOIOCTLCMD;
2806 if (!copy_to_user((pool_levels __user *) arg, &pl, sizeof(pl)))
2807 return (sizeof(pl));
2812 if (!capable(CAP_NET_ADMIN))
2814 if (copy_from_user(&pl, (pool_levels __user *) arg, sizeof(pl)))
2816 if (pl.level.min >= pl.level.init || pl.level.init >= pl.level.max)
2818 if (pl.level.min == 0)
2822 case NS_BUFTYPE_SMALL:
2823 if (pl.level.max > TOP_SB)
2825 card->sbnr.min = pl.level.min;
2826 card->sbnr.init = pl.level.init;
2827 card->sbnr.max = pl.level.max;
2830 case NS_BUFTYPE_LARGE:
2831 if (pl.level.max > TOP_LB)
2833 card->lbnr.min = pl.level.min;
2834 card->lbnr.init = pl.level.init;
2835 card->lbnr.max = pl.level.max;
2838 case NS_BUFTYPE_HUGE:
2839 if (pl.level.max > TOP_HB)
2841 card->hbnr.min = pl.level.min;
2842 card->hbnr.init = pl.level.init;
2843 card->hbnr.max = pl.level.max;
2846 case NS_BUFTYPE_IOVEC:
2847 if (pl.level.max > TOP_IOVB)
2849 card->iovnr.min = pl.level.min;
2850 card->iovnr.init = pl.level.init;
2851 card->iovnr.max = pl.level.max;
2861 if (!capable(CAP_NET_ADMIN))
2863 btype = (long) arg; /* a long is the same size as a pointer or bigger */
2866 case NS_BUFTYPE_SMALL:
2867 while (card->sbfqc < card->sbnr.init)
2871 sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
2874 NS_SKB_CB(sb)->buf_type = BUF_SM;
2875 skb_queue_tail(&card->sbpool.queue, sb);
2876 skb_reserve(sb, NS_AAL0_HEADER);
2877 push_rxbufs(card, sb);
2881 case NS_BUFTYPE_LARGE:
2882 while (card->lbfqc < card->lbnr.init)
2886 lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
2889 NS_SKB_CB(lb)->buf_type = BUF_LG;
2890 skb_queue_tail(&card->lbpool.queue, lb);
2891 skb_reserve(lb, NS_SMBUFSIZE);
2892 push_rxbufs(card, lb);
2896 case NS_BUFTYPE_HUGE:
2897 while (card->hbpool.count > card->hbnr.init)
2901 ns_grab_int_lock(card, flags);
2902 hb = skb_dequeue(&card->hbpool.queue);
2903 card->hbpool.count--;
2904 spin_unlock_irqrestore(&card->int_lock, flags);
2906 printk("nicstar%d: huge buffer count inconsistent.\n",
2909 dev_kfree_skb_any(hb);
2912 while (card->hbpool.count < card->hbnr.init)
2916 hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
2919 NS_SKB_CB(hb)->buf_type = BUF_NONE;
2920 ns_grab_int_lock(card, flags);
2921 skb_queue_tail(&card->hbpool.queue, hb);
2922 card->hbpool.count++;
2923 spin_unlock_irqrestore(&card->int_lock, flags);
2927 case NS_BUFTYPE_IOVEC:
2928 while (card->iovpool.count > card->iovnr.init)
2930 struct sk_buff *iovb;
2932 ns_grab_int_lock(card, flags);
2933 iovb = skb_dequeue(&card->iovpool.queue);
2934 card->iovpool.count--;
2935 spin_unlock_irqrestore(&card->int_lock, flags);
2937 printk("nicstar%d: iovec buffer count inconsistent.\n",
2940 dev_kfree_skb_any(iovb);
2943 while (card->iovpool.count < card->iovnr.init)
2945 struct sk_buff *iovb;
2947 iovb = alloc_skb(NS_IOVBUFSIZE, GFP_KERNEL);
2950 NS_SKB_CB(iovb)->buf_type = BUF_NONE;
2951 ns_grab_int_lock(card, flags);
2952 skb_queue_tail(&card->iovpool.queue, iovb);
2953 card->iovpool.count++;
2954 spin_unlock_irqrestore(&card->int_lock, flags);
2965 if (dev->phy && dev->phy->ioctl) {
2966 return dev->phy->ioctl(dev, cmd, arg);
2969 printk("nicstar%d: %s == NULL \n", card->index,
2970 dev->phy ? "dev->phy->ioctl" : "dev->phy");
2971 return -ENOIOCTLCMD;
2977 static void which_list(ns_dev *card, struct sk_buff *skb)
2979 printk("skb buf_type: 0x%08x\n", NS_SKB_CB(skb)->buf_type);
2983 static void ns_poll(unsigned long arg)
2987 unsigned long flags;
2990 PRINTK("nicstar: Entering ns_poll().\n");
2991 for (i = 0; i < num_cards; i++)
2994 if (spin_is_locked(&card->int_lock)) {
2995 /* Probably it isn't worth spinning */
2998 ns_grab_int_lock(card, flags);
3001 stat_r = readl(card->membase + STAT);
3002 if (stat_r & NS_STAT_TSIF)
3003 stat_w |= NS_STAT_TSIF;
3004 if (stat_r & NS_STAT_EOPDU)
3005 stat_w |= NS_STAT_EOPDU;
3010 writel(stat_w, card->membase + STAT);
3011 spin_unlock_irqrestore(&card->int_lock, flags);
3013 mod_timer(&ns_timer, jiffies + NS_POLL_PERIOD);
3014 PRINTK("nicstar: Leaving ns_poll().\n");
3019 static int ns_parse_mac(char *mac, unsigned char *esi)
3024 if (mac == NULL || esi == NULL)
3027 for (i = 0; i < 6; i++)
3029 if ((byte1 = ns_h2i(mac[j++])) < 0)
3031 if ((byte0 = ns_h2i(mac[j++])) < 0)
3033 esi[i] = (unsigned char) (byte1 * 16 + byte0);
3036 if (mac[j++] != ':')
3045 static short ns_h2i(char c)
3047 if (c >= '0' && c <= '9')
3048 return (short) (c - '0');
3049 if (c >= 'A' && c <= 'F')
3050 return (short) (c - 'A' + 10);
3051 if (c >= 'a' && c <= 'f')
3052 return (short) (c - 'a' + 10);
3058 static void ns_phy_put(struct atm_dev *dev, unsigned char value,
3062 unsigned long flags;
3064 card = dev->dev_data;
3065 ns_grab_res_lock(card, flags);
3066 while(CMD_BUSY(card));
3067 writel((unsigned long) value, card->membase + DR0);
3068 writel(NS_CMD_WRITE_UTILITY | 0x00000200 | (addr & 0x000000FF),
3069 card->membase + CMD);
3070 spin_unlock_irqrestore(&card->res_lock, flags);
3075 static unsigned char ns_phy_get(struct atm_dev *dev, unsigned long addr)
3078 unsigned long flags;
3081 card = dev->dev_data;
3082 ns_grab_res_lock(card, flags);
3083 while(CMD_BUSY(card));
3084 writel(NS_CMD_READ_UTILITY | 0x00000200 | (addr & 0x000000FF),
3085 card->membase + CMD);
3086 while(CMD_BUSY(card));
3087 data = readl(card->membase + DR0) & 0x000000FF;
3088 spin_unlock_irqrestore(&card->res_lock, flags);
3089 return (unsigned char) data;
3094 module_init(nicstar_init);
3095 module_exit(nicstar_cleanup);