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 #include "nicstarmac.h"
58 #ifdef CONFIG_ATM_NICSTAR_USE_SUNI
60 #endif /* CONFIG_ATM_NICSTAR_USE_SUNI */
61 #ifdef CONFIG_ATM_NICSTAR_USE_IDT77105
63 #endif /* CONFIG_ATM_NICSTAR_USE_IDT77105 */
65 #if BITS_PER_LONG != 32
66 # error FIXME: this driver requires a 32-bit platform
69 /* Additional code ************************************************************/
71 #include "nicstarmac.c"
74 /* Configurable parameters ****************************************************/
82 #undef NS_USE_DESTRUCTORS /* For now keep this undefined unless you know
83 you're going to use only raw ATM */
86 /* Do not touch these *********************************************************/
89 #define TXPRINTK(args...) printk(args)
91 #define TXPRINTK(args...)
95 #define RXPRINTK(args...) printk(args)
97 #define RXPRINTK(args...)
101 #define PRINTK(args...) printk(args)
103 #define PRINTK(args...)
104 #endif /* GENERAL_DEBUG */
107 #define XPRINTK(args...) printk(args)
109 #define XPRINTK(args...)
110 #endif /* EXTRA_DEBUG */
113 /* Macros *********************************************************************/
115 #define CMD_BUSY(card) (readl((card)->membase + STAT) & NS_STAT_CMDBZ)
117 #define NS_DELAY mdelay(1)
119 #define ALIGN_BUS_ADDR(addr, alignment) \
120 ((((u32) (addr)) + (((u32) (alignment)) - 1)) & ~(((u32) (alignment)) - 1))
121 #define ALIGN_ADDRESS(addr, alignment) \
122 bus_to_virt(ALIGN_BUS_ADDR(virt_to_bus(addr), alignment))
127 #define ATM_SKB(s) (&(s)->atm)
130 /* Spinlock debugging stuff */
131 #ifdef NS_DEBUG_SPINLOCKS /* See nicstar.h */
132 #define ns_grab_int_lock(card,flags) \
134 unsigned long nsdsf, nsdsf2; \
135 local_irq_save(flags); \
136 save_flags(nsdsf); cli();\
137 if (nsdsf & (1<<9)) printk ("nicstar.c: ints %sabled -> enabled.\n", \
138 (flags)&(1<<9)?"en":"dis"); \
139 if (spin_is_locked(&(card)->int_lock) && \
140 (card)->cpu_int == smp_processor_id()) { \
141 printk("nicstar.c: line %d (cpu %d) int_lock already locked at line %d (cpu %d)\n", \
142 __LINE__, smp_processor_id(), (card)->has_int_lock, \
144 printk("nicstar.c: ints were %sabled.\n", ((flags)&(1<<9)?"en":"dis")); \
146 if (spin_is_locked(&(card)->res_lock) && \
147 (card)->cpu_res == smp_processor_id()) { \
148 printk("nicstar.c: line %d (cpu %d) res_lock locked at line %d (cpu %d)(trying int)\n", \
149 __LINE__, smp_processor_id(), (card)->has_res_lock, \
151 printk("nicstar.c: ints were %sabled.\n", ((flags)&(1<<9)?"en":"dis")); \
153 spin_lock_irq(&(card)->int_lock); \
154 (card)->has_int_lock = __LINE__; \
155 (card)->cpu_int = smp_processor_id(); \
156 restore_flags(nsdsf); } while (0)
157 #define ns_grab_res_lock(card,flags) \
159 unsigned long nsdsf, nsdsf2; \
160 local_irq_save(flags); \
161 save_flags(nsdsf); cli();\
162 if (nsdsf & (1<<9)) printk ("nicstar.c: ints %sabled -> enabled.\n", \
163 (flags)&(1<<9)?"en":"dis"); \
164 if (spin_is_locked(&(card)->res_lock) && \
165 (card)->cpu_res == smp_processor_id()) { \
166 printk("nicstar.c: line %d (cpu %d) res_lock already locked at line %d (cpu %d)\n", \
167 __LINE__, smp_processor_id(), (card)->has_res_lock, \
169 printk("nicstar.c: ints were %sabled.\n", ((flags)&(1<<9)?"en":"dis")); \
171 spin_lock_irq(&(card)->res_lock); \
172 (card)->has_res_lock = __LINE__; \
173 (card)->cpu_res = smp_processor_id(); \
174 restore_flags(nsdsf); } while (0)
175 #define ns_grab_scq_lock(card,scq,flags) \
177 unsigned long nsdsf, nsdsf2; \
178 local_irq_save(flags); \
179 save_flags(nsdsf); cli();\
180 if (nsdsf & (1<<9)) printk ("nicstar.c: ints %sabled -> enabled.\n", \
181 (flags)&(1<<9)?"en":"dis"); \
182 if (spin_is_locked(&(scq)->lock) && \
183 (scq)->cpu_lock == smp_processor_id()) { \
184 printk("nicstar.c: line %d (cpu %d) this scq_lock already locked at line %d (cpu %d)\n", \
185 __LINE__, smp_processor_id(), (scq)->has_lock, \
187 printk("nicstar.c: ints were %sabled.\n", ((flags)&(1<<9)?"en":"dis")); \
189 if (spin_is_locked(&(card)->res_lock) && \
190 (card)->cpu_res == smp_processor_id()) { \
191 printk("nicstar.c: line %d (cpu %d) res_lock locked at line %d (cpu %d)(trying scq)\n", \
192 __LINE__, smp_processor_id(), (card)->has_res_lock, \
194 printk("nicstar.c: ints were %sabled.\n", ((flags)&(1<<9)?"en":"dis")); \
196 spin_lock_irq(&(scq)->lock); \
197 (scq)->has_lock = __LINE__; \
198 (scq)->cpu_lock = smp_processor_id(); \
199 restore_flags(nsdsf); } while (0)
200 #else /* !NS_DEBUG_SPINLOCKS */
201 #define ns_grab_int_lock(card,flags) \
202 spin_lock_irqsave(&(card)->int_lock,(flags))
203 #define ns_grab_res_lock(card,flags) \
204 spin_lock_irqsave(&(card)->res_lock,(flags))
205 #define ns_grab_scq_lock(card,scq,flags) \
206 spin_lock_irqsave(&(scq)->lock,flags)
207 #endif /* NS_DEBUG_SPINLOCKS */
210 /* Function declarations ******************************************************/
212 static u32 ns_read_sram(ns_dev *card, u32 sram_address);
213 static void ns_write_sram(ns_dev *card, u32 sram_address, u32 *value, int count);
214 static int __devinit ns_init_card(int i, struct pci_dev *pcidev);
215 static void __devinit ns_init_card_error(ns_dev *card, int error);
216 static scq_info *get_scq(int size, u32 scd);
217 static void free_scq(scq_info *scq, struct atm_vcc *vcc);
218 static void push_rxbufs(ns_dev *card, u32 type, u32 handle1, u32 addr1,
219 u32 handle2, u32 addr2);
220 static irqreturn_t ns_irq_handler(int irq, void *dev_id, struct pt_regs *regs);
221 static int ns_open(struct atm_vcc *vcc);
222 static void ns_close(struct atm_vcc *vcc);
223 static void fill_tst(ns_dev *card, int n, vc_map *vc);
224 static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb);
225 static int push_scqe(ns_dev *card, vc_map *vc, scq_info *scq, ns_scqe *tbd,
226 struct sk_buff *skb);
227 static void process_tsq(ns_dev *card);
228 static void drain_scq(ns_dev *card, scq_info *scq, int pos);
229 static void process_rsq(ns_dev *card);
230 static void dequeue_rx(ns_dev *card, ns_rsqe *rsqe);
231 #ifdef NS_USE_DESTRUCTORS
232 static void ns_sb_destructor(struct sk_buff *sb);
233 static void ns_lb_destructor(struct sk_buff *lb);
234 static void ns_hb_destructor(struct sk_buff *hb);
235 #endif /* NS_USE_DESTRUCTORS */
236 static void recycle_rx_buf(ns_dev *card, struct sk_buff *skb);
237 static void recycle_iovec_rx_bufs(ns_dev *card, struct iovec *iov, int count);
238 static void recycle_iov_buf(ns_dev *card, struct sk_buff *iovb);
239 static void dequeue_sm_buf(ns_dev *card, struct sk_buff *sb);
240 static void dequeue_lg_buf(ns_dev *card, struct sk_buff *lb);
241 static int ns_proc_read(struct atm_dev *dev, loff_t *pos, char *page);
242 static int ns_ioctl(struct atm_dev *dev, unsigned int cmd, void __user *arg);
243 static void which_list(ns_dev *card, struct sk_buff *skb);
244 static void ns_poll(unsigned long arg);
245 static int ns_parse_mac(char *mac, unsigned char *esi);
246 static short ns_h2i(char c);
247 static void ns_phy_put(struct atm_dev *dev, unsigned char value,
249 static unsigned char ns_phy_get(struct atm_dev *dev, unsigned long addr);
253 /* Global variables ***********************************************************/
255 static struct ns_dev *cards[NS_MAX_CARDS];
256 static unsigned num_cards;
257 static struct atmdev_ops atm_ops =
263 .phy_put = ns_phy_put,
264 .phy_get = ns_phy_get,
265 .proc_read = ns_proc_read,
266 .owner = THIS_MODULE,
268 static struct timer_list ns_timer;
269 static char *mac[NS_MAX_CARDS];
270 MODULE_PARM(mac, "1-" __MODULE_STRING(NS_MAX_CARDS) "s");
271 MODULE_LICENSE("GPL");
274 /* Functions*******************************************************************/
276 static int __devinit nicstar_init_one(struct pci_dev *pcidev,
277 const struct pci_device_id *ent)
279 static int index = -1;
285 error = ns_init_card(index, pcidev);
287 cards[index--] = NULL; /* don't increment index */
298 static void __devexit nicstar_remove_one(struct pci_dev *pcidev)
301 ns_dev *card = pci_get_drvdata(pcidev);
303 struct sk_buff *iovb;
309 if (cards[i] == NULL)
312 if (card->atmdev->phy && card->atmdev->phy->stop)
313 card->atmdev->phy->stop(card->atmdev);
315 /* Stop everything */
316 writel(0x00000000, card->membase + CFG);
318 /* De-register device */
319 atm_dev_deregister(card->atmdev);
321 /* Disable PCI device */
322 pci_disable_device(pcidev);
324 /* Free up resources */
326 PRINTK("nicstar%d: freeing %d huge buffers.\n", i, card->hbpool.count);
327 while ((hb = skb_dequeue(&card->hbpool.queue)) != NULL)
329 dev_kfree_skb_any(hb);
332 PRINTK("nicstar%d: %d huge buffers freed.\n", i, j);
334 PRINTK("nicstar%d: freeing %d iovec buffers.\n", i, card->iovpool.count);
335 while ((iovb = skb_dequeue(&card->iovpool.queue)) != NULL)
337 dev_kfree_skb_any(iovb);
340 PRINTK("nicstar%d: %d iovec buffers freed.\n", i, j);
341 while ((lb = skb_dequeue(&card->lbpool.queue)) != NULL)
342 dev_kfree_skb_any(lb);
343 while ((sb = skb_dequeue(&card->sbpool.queue)) != NULL)
344 dev_kfree_skb_any(sb);
345 free_scq(card->scq0, NULL);
346 for (j = 0; j < NS_FRSCD_NUM; j++)
348 if (card->scd2vc[j] != NULL)
349 free_scq(card->scd2vc[j]->scq, card->scd2vc[j]->tx_vcc);
351 kfree(card->rsq.org);
352 kfree(card->tsq.org);
353 free_irq(card->pcidev->irq, card);
354 iounmap((void *) card->membase);
360 static struct pci_device_id nicstar_pci_tbl[] __devinitdata =
362 {PCI_VENDOR_ID_IDT, PCI_DEVICE_ID_IDT_IDT77201,
363 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
364 {0,} /* terminate list */
366 MODULE_DEVICE_TABLE(pci, nicstar_pci_tbl);
370 static struct pci_driver nicstar_driver = {
372 .id_table = nicstar_pci_tbl,
373 .probe = nicstar_init_one,
374 .remove = __devexit_p(nicstar_remove_one),
379 static int __init nicstar_init(void)
381 unsigned error = 0; /* Initialized to remove compile warning */
383 XPRINTK("nicstar: nicstar_init() called.\n");
385 error = pci_module_init(&nicstar_driver);
387 TXPRINTK("nicstar: TX debug enabled.\n");
388 RXPRINTK("nicstar: RX debug enabled.\n");
389 PRINTK("nicstar: General debug enabled.\n");
391 printk("nicstar: using PHY loopback.\n");
392 #endif /* PHY_LOOPBACK */
393 XPRINTK("nicstar: nicstar_init() returned.\n");
396 init_timer(&ns_timer);
397 ns_timer.expires = jiffies + NS_POLL_PERIOD;
399 ns_timer.function = ns_poll;
400 add_timer(&ns_timer);
408 static void __exit nicstar_cleanup(void)
410 XPRINTK("nicstar: nicstar_cleanup() called.\n");
412 del_timer(&ns_timer);
414 pci_unregister_driver(&nicstar_driver);
416 XPRINTK("nicstar: nicstar_cleanup() returned.\n");
421 static u32 ns_read_sram(ns_dev *card, u32 sram_address)
426 sram_address &= 0x0007FFFC; /* address must be dword aligned */
427 sram_address |= 0x50000000; /* SRAM read command */
428 ns_grab_res_lock(card, flags);
429 while (CMD_BUSY(card));
430 writel(sram_address, card->membase + CMD);
431 while (CMD_BUSY(card));
432 data = readl(card->membase + DR0);
433 spin_unlock_irqrestore(&card->res_lock, flags);
439 static void ns_write_sram(ns_dev *card, u32 sram_address, u32 *value, int count)
443 count--; /* count range now is 0..3 instead of 1..4 */
445 c <<= 2; /* to use increments of 4 */
446 ns_grab_res_lock(card, flags);
447 while (CMD_BUSY(card));
448 for (i = 0; i <= c; i += 4)
449 writel(*(value++), card->membase + i);
450 /* Note: DR# registers are the first 4 dwords in nicstar's memspace,
451 so card->membase + DR0 == card->membase */
453 sram_address &= 0x0007FFFC;
454 sram_address |= (0x40000000 | count);
455 writel(sram_address, card->membase + CMD);
456 spin_unlock_irqrestore(&card->res_lock, flags);
460 static int __devinit ns_init_card(int i, struct pci_dev *pcidev)
463 struct ns_dev *card = NULL;
464 unsigned char pci_latency;
470 unsigned long membase;
474 if (pci_enable_device(pcidev))
476 printk("nicstar%d: can't enable PCI device\n", i);
478 ns_init_card_error(card, error);
482 if ((card = kmalloc(sizeof(ns_dev), GFP_KERNEL)) == NULL)
484 printk("nicstar%d: can't allocate memory for device structure.\n", i);
486 ns_init_card_error(card, error);
490 spin_lock_init(&card->int_lock);
491 spin_lock_init(&card->res_lock);
493 pci_set_drvdata(pcidev, card);
497 card->pcidev = pcidev;
498 membase = pci_resource_start(pcidev, 1);
499 card->membase = ioremap(membase, NS_IOREMAP_SIZE);
500 if (card->membase == 0)
502 printk("nicstar%d: can't ioremap() membase.\n",i);
504 ns_init_card_error(card, error);
507 PRINTK("nicstar%d: membase at 0x%x.\n", i, card->membase);
509 pci_set_master(pcidev);
511 if (pci_read_config_byte(pcidev, PCI_LATENCY_TIMER, &pci_latency) != 0)
513 printk("nicstar%d: can't read PCI latency timer.\n", i);
515 ns_init_card_error(card, error);
518 #ifdef NS_PCI_LATENCY
519 if (pci_latency < NS_PCI_LATENCY)
521 PRINTK("nicstar%d: setting PCI latency timer to %d.\n", i, NS_PCI_LATENCY);
522 for (j = 1; j < 4; j++)
524 if (pci_write_config_byte(pcidev, PCI_LATENCY_TIMER, NS_PCI_LATENCY) != 0)
529 printk("nicstar%d: can't set PCI latency timer to %d.\n", i, NS_PCI_LATENCY);
531 ns_init_card_error(card, error);
535 #endif /* NS_PCI_LATENCY */
537 /* Clear timer overflow */
538 data = readl(card->membase + STAT);
539 if (data & NS_STAT_TMROF)
540 writel(NS_STAT_TMROF, card->membase + STAT);
543 writel(NS_CFG_SWRST, card->membase + CFG);
545 writel(0x00000000, card->membase + CFG);
548 writel(0x00000008, card->membase + GP);
550 writel(0x00000001, card->membase + GP);
552 while (CMD_BUSY(card));
553 writel(NS_CMD_WRITE_UTILITY | 0x00000100, card->membase + CMD); /* Sync UTOPIA with SAR clock */
556 /* Detect PHY type */
557 while (CMD_BUSY(card));
558 writel(NS_CMD_READ_UTILITY | 0x00000200, card->membase + CMD);
559 while (CMD_BUSY(card));
560 data = readl(card->membase + DR0);
563 printk("nicstar%d: PHY seems to be 25 Mbps.\n", i);
564 card->max_pcr = ATM_25_PCR;
565 while(CMD_BUSY(card));
566 writel(0x00000008, card->membase + DR0);
567 writel(NS_CMD_WRITE_UTILITY | 0x00000200, card->membase + CMD);
568 /* Clear an eventual pending interrupt */
569 writel(NS_STAT_SFBQF, card->membase + STAT);
571 while(CMD_BUSY(card));
572 writel(0x00000022, card->membase + DR0);
573 writel(NS_CMD_WRITE_UTILITY | 0x00000202, card->membase + CMD);
574 #endif /* PHY_LOOPBACK */
578 printk("nicstar%d: PHY seems to be 155 Mbps.\n", i);
579 card->max_pcr = ATM_OC3_PCR;
581 while(CMD_BUSY(card));
582 writel(0x00000002, card->membase + DR0);
583 writel(NS_CMD_WRITE_UTILITY | 0x00000205, card->membase + CMD);
584 #endif /* PHY_LOOPBACK */
587 printk("nicstar%d: unknown PHY type (0x%08X).\n", i, data);
589 ns_init_card_error(card, error);
592 writel(0x00000000, card->membase + GP);
594 /* Determine SRAM size */
596 ns_write_sram(card, 0x1C003, &data, 1);
598 ns_write_sram(card, 0x14003, &data, 1);
599 if (ns_read_sram(card, 0x14003) == 0x89ABCDEF &&
600 ns_read_sram(card, 0x1C003) == 0x76543210)
601 card->sram_size = 128;
603 card->sram_size = 32;
604 PRINTK("nicstar%d: %dK x 32bit SRAM size.\n", i, card->sram_size);
606 card->rct_size = NS_MAX_RCTSIZE;
608 #if (NS_MAX_RCTSIZE == 4096)
609 if (card->sram_size == 128)
610 printk("nicstar%d: limiting maximum VCI. See NS_MAX_RCTSIZE in nicstar.h\n", i);
611 #elif (NS_MAX_RCTSIZE == 16384)
612 if (card->sram_size == 32)
614 printk("nicstar%d: wasting memory. See NS_MAX_RCTSIZE in nicstar.h\n", i);
615 card->rct_size = 4096;
618 #error NS_MAX_RCTSIZE must be either 4096 or 16384 in nicstar.c
621 card->vpibits = NS_VPIBITS;
622 if (card->rct_size == 4096)
623 card->vcibits = 12 - NS_VPIBITS;
624 else /* card->rct_size == 16384 */
625 card->vcibits = 14 - NS_VPIBITS;
627 /* Initialize the nicstar eeprom/eprom stuff, for the MAC addr */
629 nicstar_init_eprom(card->membase);
631 if (request_irq(pcidev->irq, &ns_irq_handler, SA_INTERRUPT | SA_SHIRQ, "nicstar", card) != 0)
633 printk("nicstar%d: can't allocate IRQ %d.\n", i, pcidev->irq);
635 ns_init_card_error(card, error);
639 /* Set the VPI/VCI MSb mask to zero so we can receive OAM cells */
640 writel(0x00000000, card->membase + VPM);
643 card->tsq.org = kmalloc(NS_TSQSIZE + NS_TSQ_ALIGNMENT, GFP_KERNEL);
644 if (card->tsq.org == NULL)
646 printk("nicstar%d: can't allocate TSQ.\n", i);
648 ns_init_card_error(card, error);
651 card->tsq.base = (ns_tsi *) ALIGN_ADDRESS(card->tsq.org, NS_TSQ_ALIGNMENT);
652 card->tsq.next = card->tsq.base;
653 card->tsq.last = card->tsq.base + (NS_TSQ_NUM_ENTRIES - 1);
654 for (j = 0; j < NS_TSQ_NUM_ENTRIES; j++)
655 ns_tsi_init(card->tsq.base + j);
656 writel(0x00000000, card->membase + TSQH);
657 writel((u32) virt_to_bus(card->tsq.base), card->membase + TSQB);
658 PRINTK("nicstar%d: TSQ base at 0x%x 0x%x 0x%x.\n", i, (u32) card->tsq.base,
659 (u32) virt_to_bus(card->tsq.base), readl(card->membase + TSQB));
662 card->rsq.org = kmalloc(NS_RSQSIZE + NS_RSQ_ALIGNMENT, GFP_KERNEL);
663 if (card->rsq.org == NULL)
665 printk("nicstar%d: can't allocate RSQ.\n", i);
667 ns_init_card_error(card, error);
670 card->rsq.base = (ns_rsqe *) ALIGN_ADDRESS(card->rsq.org, NS_RSQ_ALIGNMENT);
671 card->rsq.next = card->rsq.base;
672 card->rsq.last = card->rsq.base + (NS_RSQ_NUM_ENTRIES - 1);
673 for (j = 0; j < NS_RSQ_NUM_ENTRIES; j++)
674 ns_rsqe_init(card->rsq.base + j);
675 writel(0x00000000, card->membase + RSQH);
676 writel((u32) virt_to_bus(card->rsq.base), card->membase + RSQB);
677 PRINTK("nicstar%d: RSQ base at 0x%x.\n", i, (u32) card->rsq.base);
679 /* Initialize SCQ0, the only VBR SCQ used */
680 card->scq1 = (scq_info *) NULL;
681 card->scq2 = (scq_info *) NULL;
682 card->scq0 = get_scq(VBR_SCQSIZE, NS_VRSCD0);
683 if (card->scq0 == (scq_info *) NULL)
685 printk("nicstar%d: can't get SCQ0.\n", i);
687 ns_init_card_error(card, error);
690 u32d[0] = (u32) virt_to_bus(card->scq0->base);
691 u32d[1] = (u32) 0x00000000;
692 u32d[2] = (u32) 0xffffffff;
693 u32d[3] = (u32) 0x00000000;
694 ns_write_sram(card, NS_VRSCD0, u32d, 4);
695 ns_write_sram(card, NS_VRSCD1, u32d, 4); /* These last two won't be used */
696 ns_write_sram(card, NS_VRSCD2, u32d, 4); /* but are initialized, just in case... */
697 card->scq0->scd = NS_VRSCD0;
698 PRINTK("nicstar%d: VBR-SCQ0 base at 0x%x.\n", i, (u32) card->scq0->base);
700 /* Initialize TSTs */
701 card->tst_addr = NS_TST0;
702 card->tst_free_entries = NS_TST_NUM_ENTRIES;
703 data = NS_TST_OPCODE_VARIABLE;
704 for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
705 ns_write_sram(card, NS_TST0 + j, &data, 1);
706 data = ns_tste_make(NS_TST_OPCODE_END, NS_TST0);
707 ns_write_sram(card, NS_TST0 + NS_TST_NUM_ENTRIES, &data, 1);
708 for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
709 ns_write_sram(card, NS_TST1 + j, &data, 1);
710 data = ns_tste_make(NS_TST_OPCODE_END, NS_TST1);
711 ns_write_sram(card, NS_TST1 + NS_TST_NUM_ENTRIES, &data, 1);
712 for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
713 card->tste2vc[j] = NULL;
714 writel(NS_TST0 << 2, card->membase + TSTB);
717 /* Initialize RCT. AAL type is set on opening the VC. */
719 u32d[0] = NS_RCTE_RAWCELLINTEN;
721 u32d[0] = 0x00000000;
722 #endif /* RCQ_SUPPORT */
723 u32d[1] = 0x00000000;
724 u32d[2] = 0x00000000;
725 u32d[3] = 0xFFFFFFFF;
726 for (j = 0; j < card->rct_size; j++)
727 ns_write_sram(card, j * 4, u32d, 4);
729 memset(card->vcmap, 0, NS_MAX_RCTSIZE * sizeof(vc_map));
731 for (j = 0; j < NS_FRSCD_NUM; j++)
732 card->scd2vc[j] = NULL;
734 /* Initialize buffer levels */
735 card->sbnr.min = MIN_SB;
736 card->sbnr.init = NUM_SB;
737 card->sbnr.max = MAX_SB;
738 card->lbnr.min = MIN_LB;
739 card->lbnr.init = NUM_LB;
740 card->lbnr.max = MAX_LB;
741 card->iovnr.min = MIN_IOVB;
742 card->iovnr.init = NUM_IOVB;
743 card->iovnr.max = MAX_IOVB;
744 card->hbnr.min = MIN_HB;
745 card->hbnr.init = NUM_HB;
746 card->hbnr.max = MAX_HB;
748 card->sm_handle = 0x00000000;
749 card->sm_addr = 0x00000000;
750 card->lg_handle = 0x00000000;
751 card->lg_addr = 0x00000000;
753 card->efbie = 1; /* To prevent push_rxbufs from enabling the interrupt */
755 /* Pre-allocate some huge buffers */
756 skb_queue_head_init(&card->hbpool.queue);
757 card->hbpool.count = 0;
758 for (j = 0; j < NUM_HB; j++)
761 hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
764 printk("nicstar%d: can't allocate %dth of %d huge buffers.\n",
767 ns_init_card_error(card, error);
770 skb_queue_tail(&card->hbpool.queue, hb);
771 card->hbpool.count++;
775 /* Allocate large buffers */
776 skb_queue_head_init(&card->lbpool.queue);
777 card->lbpool.count = 0; /* Not used */
778 for (j = 0; j < NUM_LB; j++)
781 lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
784 printk("nicstar%d: can't allocate %dth of %d large buffers.\n",
787 ns_init_card_error(card, error);
790 skb_queue_tail(&card->lbpool.queue, lb);
791 skb_reserve(lb, NS_SMBUFSIZE);
792 push_rxbufs(card, BUF_LG, (u32) lb, (u32) virt_to_bus(lb->data), 0, 0);
793 /* Due to the implementation of push_rxbufs() this is 1, not 0 */
797 card->rawch = (u32) virt_to_bus(lb->data);
800 /* Test for strange behaviour which leads to crashes */
801 if ((bcount = ns_stat_lfbqc_get(readl(card->membase + STAT))) < card->lbnr.min)
803 printk("nicstar%d: Strange... Just allocated %d large buffers and lfbqc = %d.\n",
806 ns_init_card_error(card, error);
811 /* Allocate small buffers */
812 skb_queue_head_init(&card->sbpool.queue);
813 card->sbpool.count = 0; /* Not used */
814 for (j = 0; j < NUM_SB; j++)
817 sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
820 printk("nicstar%d: can't allocate %dth of %d small buffers.\n",
823 ns_init_card_error(card, error);
826 skb_queue_tail(&card->sbpool.queue, sb);
827 skb_reserve(sb, NS_AAL0_HEADER);
828 push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data), 0, 0);
830 /* Test for strange behaviour which leads to crashes */
831 if ((bcount = ns_stat_sfbqc_get(readl(card->membase + STAT))) < card->sbnr.min)
833 printk("nicstar%d: Strange... Just allocated %d small buffers and sfbqc = %d.\n",
836 ns_init_card_error(card, error);
841 /* Allocate iovec buffers */
842 skb_queue_head_init(&card->iovpool.queue);
843 card->iovpool.count = 0;
844 for (j = 0; j < NUM_IOVB; j++)
846 struct sk_buff *iovb;
847 iovb = alloc_skb(NS_IOVBUFSIZE, GFP_KERNEL);
850 printk("nicstar%d: can't allocate %dth of %d iovec buffers.\n",
853 ns_init_card_error(card, error);
856 skb_queue_tail(&card->iovpool.queue, iovb);
857 card->iovpool.count++;
862 /* Configure NICStAR */
863 if (card->rct_size == 4096)
864 ns_cfg_rctsize = NS_CFG_RCTSIZE_4096_ENTRIES;
865 else /* (card->rct_size == 16384) */
866 ns_cfg_rctsize = NS_CFG_RCTSIZE_16384_ENTRIES;
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((void *) 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)
997 return (scq_info *) NULL;
999 scq = (scq_info *) kmalloc(sizeof(scq_info), GFP_KERNEL);
1000 if (scq == (scq_info *) NULL)
1001 return (scq_info *) NULL;
1002 scq->org = kmalloc(2 * size, GFP_KERNEL);
1003 if (scq->org == NULL)
1006 return (scq_info *) NULL;
1008 scq->skb = (struct sk_buff **) kmalloc(sizeof(struct sk_buff *) *
1009 (size / NS_SCQE_SIZE), GFP_KERNEL);
1010 if (scq->skb == (struct sk_buff **) NULL)
1014 return (scq_info *) 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, u32 type, u32 handle1, u32 addr1,
1083 u32 handle2, u32 addr2)
1086 unsigned long flags;
1089 #ifdef GENERAL_DEBUG
1091 printk("nicstar%d: push_rxbufs called with addr1 = 0.\n", card->index);
1092 #endif /* GENERAL_DEBUG */
1094 stat = readl(card->membase + STAT);
1095 card->sbfqc = ns_stat_sfbqc_get(stat);
1096 card->lbfqc = ns_stat_lfbqc_get(stat);
1103 addr2 = card->sm_addr;
1104 handle2 = card->sm_handle;
1105 card->sm_addr = 0x00000000;
1106 card->sm_handle = 0x00000000;
1108 else /* (!sm_addr) */
1110 card->sm_addr = addr1;
1111 card->sm_handle = handle1;
1115 else /* type == BUF_LG */
1121 addr2 = card->lg_addr;
1122 handle2 = card->lg_handle;
1123 card->lg_addr = 0x00000000;
1124 card->lg_handle = 0x00000000;
1126 else /* (!lg_addr) */
1128 card->lg_addr = addr1;
1129 card->lg_handle = handle1;
1138 if (card->sbfqc >= card->sbnr.max)
1140 skb_unlink((struct sk_buff *) handle1);
1141 dev_kfree_skb_any((struct sk_buff *) handle1);
1142 skb_unlink((struct sk_buff *) handle2);
1143 dev_kfree_skb_any((struct sk_buff *) handle2);
1149 else /* (type == BUF_LG) */
1151 if (card->lbfqc >= card->lbnr.max)
1153 skb_unlink((struct sk_buff *) handle1);
1154 dev_kfree_skb_any((struct sk_buff *) handle1);
1155 skb_unlink((struct sk_buff *) handle2);
1156 dev_kfree_skb_any((struct sk_buff *) handle2);
1163 ns_grab_res_lock(card, flags);
1165 while (CMD_BUSY(card));
1166 writel(addr2, card->membase + DR3);
1167 writel(handle2, card->membase + DR2);
1168 writel(addr1, card->membase + DR1);
1169 writel(handle1, card->membase + DR0);
1170 writel(NS_CMD_WRITE_FREEBUFQ | (u32) type, card->membase + CMD);
1172 spin_unlock_irqrestore(&card->res_lock, flags);
1174 XPRINTK("nicstar%d: Pushing %s buffers at 0x%x and 0x%x.\n", card->index,
1175 (type == BUF_SM ? "small" : "large"), addr1, addr2);
1178 if (!card->efbie && card->sbfqc >= card->sbnr.min &&
1179 card->lbfqc >= card->lbnr.min)
1182 writel((readl(card->membase + CFG) | NS_CFG_EFBIE), card->membase + CFG);
1190 static irqreturn_t ns_irq_handler(int irq, void *dev_id, struct pt_regs *regs)
1194 struct atm_dev *dev;
1195 unsigned long flags;
1197 card = (ns_dev *) dev_id;
1201 PRINTK("nicstar%d: NICStAR generated an interrupt\n", card->index);
1203 ns_grab_int_lock(card, flags);
1205 stat_r = readl(card->membase + STAT);
1207 /* Transmit Status Indicator has been written to T. S. Queue */
1208 if (stat_r & NS_STAT_TSIF)
1210 TXPRINTK("nicstar%d: TSI interrupt\n", card->index);
1212 writel(NS_STAT_TSIF, card->membase + STAT);
1215 /* Incomplete CS-PDU has been transmitted */
1216 if (stat_r & NS_STAT_TXICP)
1218 writel(NS_STAT_TXICP, card->membase + STAT);
1219 TXPRINTK("nicstar%d: Incomplete CS-PDU transmitted.\n",
1223 /* Transmit Status Queue 7/8 full */
1224 if (stat_r & NS_STAT_TSQF)
1226 writel(NS_STAT_TSQF, card->membase + STAT);
1227 PRINTK("nicstar%d: TSQ full.\n", card->index);
1231 /* Timer overflow */
1232 if (stat_r & NS_STAT_TMROF)
1234 writel(NS_STAT_TMROF, card->membase + STAT);
1235 PRINTK("nicstar%d: Timer overflow.\n", card->index);
1238 /* PHY device interrupt signal active */
1239 if (stat_r & NS_STAT_PHYI)
1241 writel(NS_STAT_PHYI, card->membase + STAT);
1242 PRINTK("nicstar%d: PHY interrupt.\n", card->index);
1243 if (dev->phy && dev->phy->interrupt) {
1244 dev->phy->interrupt(dev);
1248 /* Small Buffer Queue is full */
1249 if (stat_r & NS_STAT_SFBQF)
1251 writel(NS_STAT_SFBQF, card->membase + STAT);
1252 printk("nicstar%d: Small free buffer queue is full.\n", card->index);
1255 /* Large Buffer Queue is full */
1256 if (stat_r & NS_STAT_LFBQF)
1258 writel(NS_STAT_LFBQF, card->membase + STAT);
1259 printk("nicstar%d: Large free buffer queue is full.\n", card->index);
1262 /* Receive Status Queue is full */
1263 if (stat_r & NS_STAT_RSQF)
1265 writel(NS_STAT_RSQF, card->membase + STAT);
1266 printk("nicstar%d: RSQ full.\n", card->index);
1270 /* Complete CS-PDU received */
1271 if (stat_r & NS_STAT_EOPDU)
1273 RXPRINTK("nicstar%d: End of CS-PDU received.\n", card->index);
1275 writel(NS_STAT_EOPDU, card->membase + STAT);
1278 /* Raw cell received */
1279 if (stat_r & NS_STAT_RAWCF)
1281 writel(NS_STAT_RAWCF, card->membase + STAT);
1283 printk("nicstar%d: Raw cell received and no support yet...\n",
1285 #endif /* RCQ_SUPPORT */
1286 /* NOTE: the following procedure may keep a raw cell pending until the
1287 next interrupt. As this preliminary support is only meant to
1288 avoid buffer leakage, this is not an issue. */
1289 while (readl(card->membase + RAWCT) != card->rawch)
1293 rawcell = (ns_rcqe *) bus_to_virt(card->rawch);
1294 if (ns_rcqe_islast(rawcell))
1296 struct sk_buff *oldbuf;
1298 oldbuf = card->rcbuf;
1299 card->rcbuf = (struct sk_buff *) ns_rcqe_nextbufhandle(rawcell);
1300 card->rawch = (u32) virt_to_bus(card->rcbuf->data);
1301 recycle_rx_buf(card, oldbuf);
1304 card->rawch += NS_RCQE_SIZE;
1308 /* Small buffer queue is empty */
1309 if (stat_r & NS_STAT_SFBQE)
1314 writel(NS_STAT_SFBQE, card->membase + STAT);
1315 printk("nicstar%d: Small free buffer queue empty.\n",
1317 for (i = 0; i < card->sbnr.min; i++)
1319 sb = dev_alloc_skb(NS_SMSKBSIZE);
1322 writel(readl(card->membase + CFG) & ~NS_CFG_EFBIE, card->membase + CFG);
1326 skb_queue_tail(&card->sbpool.queue, sb);
1327 skb_reserve(sb, NS_AAL0_HEADER);
1328 push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data), 0, 0);
1334 /* Large buffer queue empty */
1335 if (stat_r & NS_STAT_LFBQE)
1340 writel(NS_STAT_LFBQE, card->membase + STAT);
1341 printk("nicstar%d: Large free buffer queue empty.\n",
1343 for (i = 0; i < card->lbnr.min; i++)
1345 lb = dev_alloc_skb(NS_LGSKBSIZE);
1348 writel(readl(card->membase + CFG) & ~NS_CFG_EFBIE, card->membase + CFG);
1352 skb_queue_tail(&card->lbpool.queue, lb);
1353 skb_reserve(lb, NS_SMBUFSIZE);
1354 push_rxbufs(card, BUF_LG, (u32) lb, (u32) virt_to_bus(lb->data), 0, 0);
1360 /* Receive Status Queue is 7/8 full */
1361 if (stat_r & NS_STAT_RSQAF)
1363 writel(NS_STAT_RSQAF, card->membase + STAT);
1364 RXPRINTK("nicstar%d: RSQ almost full.\n", card->index);
1368 spin_unlock_irqrestore(&card->int_lock, flags);
1369 PRINTK("nicstar%d: end of interrupt service\n", card->index);
1375 static int ns_open(struct atm_vcc *vcc)
1379 unsigned long tmpl, modl;
1380 int tcr, tcra; /* target cell rate, and absolute value */
1381 int n = 0; /* Number of entries in the TST. Initialized to remove
1382 the compiler warning. */
1384 int frscdi = 0; /* Index of the SCD. Initialized to remove the compiler
1385 warning. How I wish compilers were clever enough to
1386 tell which variables can truly be used
1388 int inuse; /* tx or rx vc already in use by another vcc */
1389 short vpi = vcc->vpi;
1392 card = (ns_dev *) vcc->dev->dev_data;
1393 PRINTK("nicstar%d: opening vpi.vci %d.%d \n", card->index, (int) vpi, vci);
1394 if (vcc->qos.aal != ATM_AAL5 && vcc->qos.aal != ATM_AAL0)
1396 PRINTK("nicstar%d: unsupported AAL.\n", card->index);
1400 vc = &(card->vcmap[vpi << card->vcibits | vci]);
1404 if (vcc->qos.txtp.traffic_class != ATM_NONE && vc->tx)
1406 if (vcc->qos.rxtp.traffic_class != ATM_NONE && vc->rx)
1410 printk("nicstar%d: %s vci already in use.\n", card->index,
1411 inuse == 1 ? "tx" : inuse == 2 ? "rx" : "tx and rx");
1415 set_bit(ATM_VF_ADDR,&vcc->flags);
1417 /* NOTE: You are not allowed to modify an open connection's QOS. To change
1418 that, remove the ATM_VF_PARTIAL flag checking. There may be other changes
1419 needed to do that. */
1420 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
1424 set_bit(ATM_VF_PARTIAL,&vcc->flags);
1425 if (vcc->qos.txtp.traffic_class == ATM_CBR)
1427 /* Check requested cell rate and availability of SCD */
1428 if (vcc->qos.txtp.max_pcr == 0 && vcc->qos.txtp.pcr == 0 &&
1429 vcc->qos.txtp.min_pcr == 0)
1431 PRINTK("nicstar%d: trying to open a CBR vc with cell rate = 0 \n",
1433 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1434 clear_bit(ATM_VF_ADDR,&vcc->flags);
1438 tcr = atm_pcr_goal(&(vcc->qos.txtp));
1439 tcra = tcr >= 0 ? tcr : -tcr;
1441 PRINTK("nicstar%d: target cell rate = %d.\n", card->index,
1442 vcc->qos.txtp.max_pcr);
1444 tmpl = (unsigned long)tcra * (unsigned long)NS_TST_NUM_ENTRIES;
1445 modl = tmpl % card->max_pcr;
1447 n = (int)(tmpl / card->max_pcr);
1454 if ((n = (card->tst_free_entries - NS_TST_RESERVED)) <= 0)
1456 PRINTK("nicstar%d: no CBR bandwidth free.\n", card->index);
1457 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1458 clear_bit(ATM_VF_ADDR,&vcc->flags);
1465 printk("nicstar%d: selected bandwidth < granularity.\n", card->index);
1466 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1467 clear_bit(ATM_VF_ADDR,&vcc->flags);
1471 if (n > (card->tst_free_entries - NS_TST_RESERVED))
1473 PRINTK("nicstar%d: not enough free CBR bandwidth.\n", card->index);
1474 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1475 clear_bit(ATM_VF_ADDR,&vcc->flags);
1479 card->tst_free_entries -= n;
1481 XPRINTK("nicstar%d: writing %d tst entries.\n", card->index, n);
1482 for (frscdi = 0; frscdi < NS_FRSCD_NUM; frscdi++)
1484 if (card->scd2vc[frscdi] == NULL)
1486 card->scd2vc[frscdi] = vc;
1490 if (frscdi == NS_FRSCD_NUM)
1492 PRINTK("nicstar%d: no SCD available for CBR channel.\n", card->index);
1493 card->tst_free_entries += n;
1494 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1495 clear_bit(ATM_VF_ADDR,&vcc->flags);
1499 vc->cbr_scd = NS_FRSCD + frscdi * NS_FRSCD_SIZE;
1501 scq = get_scq(CBR_SCQSIZE, vc->cbr_scd);
1502 if (scq == (scq_info *) NULL)
1504 PRINTK("nicstar%d: can't get fixed rate SCQ.\n", card->index);
1505 card->scd2vc[frscdi] = NULL;
1506 card->tst_free_entries += n;
1507 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1508 clear_bit(ATM_VF_ADDR,&vcc->flags);
1512 u32d[0] = (u32) virt_to_bus(scq->base);
1513 u32d[1] = (u32) 0x00000000;
1514 u32d[2] = (u32) 0xffffffff;
1515 u32d[3] = (u32) 0x00000000;
1516 ns_write_sram(card, vc->cbr_scd, u32d, 4);
1518 fill_tst(card, n, vc);
1520 else if (vcc->qos.txtp.traffic_class == ATM_UBR)
1522 vc->cbr_scd = 0x00000000;
1523 vc->scq = card->scq0;
1526 if (vcc->qos.txtp.traffic_class != ATM_NONE)
1532 if (vcc->qos.rxtp.traffic_class != ATM_NONE)
1540 /* Open the connection in hardware */
1541 if (vcc->qos.aal == ATM_AAL5)
1542 status = NS_RCTE_AAL5 | NS_RCTE_CONNECTOPEN;
1543 else /* vcc->qos.aal == ATM_AAL0 */
1544 status = NS_RCTE_AAL0 | NS_RCTE_CONNECTOPEN;
1546 status |= NS_RCTE_RAWCELLINTEN;
1547 #endif /* RCQ_SUPPORT */
1548 ns_write_sram(card, NS_RCT + (vpi << card->vcibits | vci) *
1549 NS_RCT_ENTRY_SIZE, &status, 1);
1554 set_bit(ATM_VF_READY,&vcc->flags);
1560 static void ns_close(struct atm_vcc *vcc)
1568 card = vcc->dev->dev_data;
1569 PRINTK("nicstar%d: closing vpi.vci %d.%d \n", card->index,
1570 (int) vcc->vpi, vcc->vci);
1572 clear_bit(ATM_VF_READY,&vcc->flags);
1574 if (vcc->qos.rxtp.traffic_class != ATM_NONE)
1577 unsigned long flags;
1579 addr = NS_RCT + (vcc->vpi << card->vcibits | vcc->vci) * NS_RCT_ENTRY_SIZE;
1580 ns_grab_res_lock(card, flags);
1581 while(CMD_BUSY(card));
1582 writel(NS_CMD_CLOSE_CONNECTION | addr << 2, card->membase + CMD);
1583 spin_unlock_irqrestore(&card->res_lock, flags);
1586 if (vc->rx_iov != NULL)
1588 struct sk_buff *iovb;
1591 stat = readl(card->membase + STAT);
1592 card->sbfqc = ns_stat_sfbqc_get(stat);
1593 card->lbfqc = ns_stat_lfbqc_get(stat);
1595 PRINTK("nicstar%d: closing a VC with pending rx buffers.\n",
1598 recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data,
1599 NS_SKB(iovb)->iovcnt);
1600 NS_SKB(iovb)->iovcnt = 0;
1601 NS_SKB(iovb)->vcc = NULL;
1602 ns_grab_int_lock(card, flags);
1603 recycle_iov_buf(card, iovb);
1604 spin_unlock_irqrestore(&card->int_lock, flags);
1609 if (vcc->qos.txtp.traffic_class != ATM_NONE)
1614 if (vcc->qos.txtp.traffic_class == ATM_CBR)
1616 unsigned long flags;
1624 ns_grab_scq_lock(card, scq, flags);
1626 if (scqep == scq->base)
1630 if (scqep == scq->tail)
1632 spin_unlock_irqrestore(&scq->lock, flags);
1635 /* If the last entry is not a TSR, place one in the SCQ in order to
1636 be able to completely drain it and then close. */
1637 if (!ns_scqe_is_tsr(scqep) && scq->tail != scq->next)
1644 tsr.word_1 = ns_tsr_mkword_1(NS_TSR_INTENABLE);
1645 scdi = (vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE;
1646 scqi = scq->next - scq->base;
1647 tsr.word_2 = ns_tsr_mkword_2(scdi, scqi);
1648 tsr.word_3 = 0x00000000;
1649 tsr.word_4 = 0x00000000;
1652 scq->skb[index] = NULL;
1653 if (scq->next == scq->last)
1654 scq->next = scq->base;
1657 data = (u32) virt_to_bus(scq->next);
1658 ns_write_sram(card, scq->scd, &data, 1);
1660 spin_unlock_irqrestore(&scq->lock, flags);
1664 /* Free all TST entries */
1665 data = NS_TST_OPCODE_VARIABLE;
1666 for (i = 0; i < NS_TST_NUM_ENTRIES; i++)
1668 if (card->tste2vc[i] == vc)
1670 ns_write_sram(card, card->tst_addr + i, &data, 1);
1671 card->tste2vc[i] = NULL;
1672 card->tst_free_entries++;
1676 card->scd2vc[(vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE] = NULL;
1677 free_scq(vc->scq, vcc);
1680 /* remove all references to vcc before deleting it */
1681 if (vcc->qos.txtp.traffic_class != ATM_NONE)
1683 unsigned long flags;
1684 scq_info *scq = card->scq0;
1686 ns_grab_scq_lock(card, scq, flags);
1688 for(i = 0; i < scq->num_entries; i++) {
1689 if(scq->skb[i] && ATM_SKB(scq->skb[i])->vcc == vcc) {
1690 ATM_SKB(scq->skb[i])->vcc = NULL;
1691 atm_return(vcc, scq->skb[i]->truesize);
1692 PRINTK("nicstar: deleted pending vcc mapping\n");
1696 spin_unlock_irqrestore(&scq->lock, flags);
1699 vcc->dev_data = NULL;
1700 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1701 clear_bit(ATM_VF_ADDR,&vcc->flags);
1706 stat = readl(card->membase + STAT);
1707 cfg = readl(card->membase + CFG);
1708 printk("STAT = 0x%08X CFG = 0x%08X \n", stat, cfg);
1709 printk("TSQ: base = 0x%08X next = 0x%08X last = 0x%08X TSQT = 0x%08X \n",
1710 (u32) card->tsq.base, (u32) card->tsq.next,(u32) card->tsq.last,
1711 readl(card->membase + TSQT));
1712 printk("RSQ: base = 0x%08X next = 0x%08X last = 0x%08X RSQT = 0x%08X \n",
1713 (u32) card->rsq.base, (u32) card->rsq.next,(u32) card->rsq.last,
1714 readl(card->membase + RSQT));
1715 printk("Empty free buffer queue interrupt %s \n",
1716 card->efbie ? "enabled" : "disabled");
1717 printk("SBCNT = %d count = %d LBCNT = %d count = %d \n",
1718 ns_stat_sfbqc_get(stat), card->sbpool.count,
1719 ns_stat_lfbqc_get(stat), card->lbpool.count);
1720 printk("hbpool.count = %d iovpool.count = %d \n",
1721 card->hbpool.count, card->iovpool.count);
1723 #endif /* RX_DEBUG */
1728 static void fill_tst(ns_dev *card, int n, vc_map *vc)
1735 /* It would be very complicated to keep the two TSTs synchronized while
1736 assuring that writes are only made to the inactive TST. So, for now I
1737 will use only one TST. If problems occur, I will change this again */
1739 new_tst = card->tst_addr;
1741 /* Fill procedure */
1743 for (e = 0; e < NS_TST_NUM_ENTRIES; e++)
1745 if (card->tste2vc[e] == NULL)
1748 if (e == NS_TST_NUM_ENTRIES) {
1749 printk("nicstar%d: No free TST entries found. \n", card->index);
1754 cl = NS_TST_NUM_ENTRIES;
1755 data = ns_tste_make(NS_TST_OPCODE_FIXED, vc->cbr_scd);
1759 if (cl >= NS_TST_NUM_ENTRIES && card->tste2vc[e] == NULL)
1761 card->tste2vc[e] = vc;
1762 ns_write_sram(card, new_tst + e, &data, 1);
1763 cl -= NS_TST_NUM_ENTRIES;
1767 if (++e == NS_TST_NUM_ENTRIES) {
1773 /* End of fill procedure */
1775 data = ns_tste_make(NS_TST_OPCODE_END, new_tst);
1776 ns_write_sram(card, new_tst + NS_TST_NUM_ENTRIES, &data, 1);
1777 ns_write_sram(card, card->tst_addr + NS_TST_NUM_ENTRIES, &data, 1);
1778 card->tst_addr = new_tst;
1783 static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb)
1788 unsigned long buflen;
1790 u32 flags; /* TBD flags, not CPU flags */
1792 card = vcc->dev->dev_data;
1793 TXPRINTK("nicstar%d: ns_send() called.\n", card->index);
1794 if ((vc = (vc_map *) vcc->dev_data) == NULL)
1796 printk("nicstar%d: vcc->dev_data == NULL on ns_send().\n", card->index);
1797 atomic_inc(&vcc->stats->tx_err);
1798 dev_kfree_skb_any(skb);
1804 printk("nicstar%d: Trying to transmit on a non-tx VC.\n", card->index);
1805 atomic_inc(&vcc->stats->tx_err);
1806 dev_kfree_skb_any(skb);
1810 if (vcc->qos.aal != ATM_AAL5 && vcc->qos.aal != ATM_AAL0)
1812 printk("nicstar%d: Only AAL0 and AAL5 are supported.\n", card->index);
1813 atomic_inc(&vcc->stats->tx_err);
1814 dev_kfree_skb_any(skb);
1818 if (skb_shinfo(skb)->nr_frags != 0)
1820 printk("nicstar%d: No scatter-gather yet.\n", card->index);
1821 atomic_inc(&vcc->stats->tx_err);
1822 dev_kfree_skb_any(skb);
1826 ATM_SKB(skb)->vcc = vcc;
1828 if (vcc->qos.aal == ATM_AAL5)
1830 buflen = (skb->len + 47 + 8) / 48 * 48; /* Multiple of 48 */
1831 flags = NS_TBD_AAL5;
1832 scqe.word_2 = cpu_to_le32((u32) virt_to_bus(skb->data));
1833 scqe.word_3 = cpu_to_le32((u32) skb->len);
1834 scqe.word_4 = ns_tbd_mkword_4(0, (u32) vcc->vpi, (u32) vcc->vci, 0,
1835 ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? 1 : 0);
1836 flags |= NS_TBD_EOPDU;
1838 else /* (vcc->qos.aal == ATM_AAL0) */
1840 buflen = ATM_CELL_PAYLOAD; /* i.e., 48 bytes */
1841 flags = NS_TBD_AAL0;
1842 scqe.word_2 = cpu_to_le32((u32) virt_to_bus(skb->data) + NS_AAL0_HEADER);
1843 scqe.word_3 = cpu_to_le32(0x00000000);
1844 if (*skb->data & 0x02) /* Payload type 1 - end of pdu */
1845 flags |= NS_TBD_EOPDU;
1846 scqe.word_4 = cpu_to_le32(*((u32 *) skb->data) & ~NS_TBD_VC_MASK);
1847 /* Force the VPI/VCI to be the same as in VCC struct */
1848 scqe.word_4 |= cpu_to_le32((((u32) vcc->vpi) << NS_TBD_VPI_SHIFT |
1849 ((u32) vcc->vci) << NS_TBD_VCI_SHIFT) &
1853 if (vcc->qos.txtp.traffic_class == ATM_CBR)
1855 scqe.word_1 = ns_tbd_mkword_1_novbr(flags, (u32) buflen);
1856 scq = ((vc_map *) vcc->dev_data)->scq;
1860 scqe.word_1 = ns_tbd_mkword_1(flags, (u32) 1, (u32) 1, (u32) buflen);
1864 if (push_scqe(card, vc, scq, &scqe, skb) != 0)
1866 atomic_inc(&vcc->stats->tx_err);
1867 dev_kfree_skb_any(skb);
1870 atomic_inc(&vcc->stats->tx);
1877 static int push_scqe(ns_dev *card, vc_map *vc, scq_info *scq, ns_scqe *tbd,
1878 struct sk_buff *skb)
1880 unsigned long flags;
1887 ns_grab_scq_lock(card, scq, flags);
1888 while (scq->tail == scq->next)
1890 if (in_interrupt()) {
1891 spin_unlock_irqrestore(&scq->lock, flags);
1892 printk("nicstar%d: Error pushing TBD.\n", card->index);
1897 spin_unlock_irqrestore(&scq->lock, flags);
1898 interruptible_sleep_on_timeout(&scq->scqfull_waitq, SCQFULL_TIMEOUT);
1899 ns_grab_scq_lock(card, scq, flags);
1902 spin_unlock_irqrestore(&scq->lock, flags);
1903 printk("nicstar%d: Timeout pushing TBD.\n", card->index);
1908 index = (int) (scq->next - scq->base);
1909 scq->skb[index] = skb;
1910 XPRINTK("nicstar%d: sending skb at 0x%x (pos %d).\n",
1911 card->index, (u32) skb, index);
1912 XPRINTK("nicstar%d: TBD written:\n0x%x\n0x%x\n0x%x\n0x%x\n at 0x%x.\n",
1913 card->index, le32_to_cpu(tbd->word_1), le32_to_cpu(tbd->word_2),
1914 le32_to_cpu(tbd->word_3), le32_to_cpu(tbd->word_4),
1916 if (scq->next == scq->last)
1917 scq->next = scq->base;
1922 if (scq->num_entries == VBR_SCQ_NUM_ENTRIES)
1930 if (vc->tbd_count >= MAX_TBD_PER_VC || scq->tbd_count >= MAX_TBD_PER_SCQ)
1934 while (scq->tail == scq->next)
1936 if (in_interrupt()) {
1937 data = (u32) virt_to_bus(scq->next);
1938 ns_write_sram(card, scq->scd, &data, 1);
1939 spin_unlock_irqrestore(&scq->lock, flags);
1940 printk("nicstar%d: Error pushing TSR.\n", card->index);
1945 if (has_run++) break;
1946 spin_unlock_irqrestore(&scq->lock, flags);
1947 interruptible_sleep_on_timeout(&scq->scqfull_waitq, SCQFULL_TIMEOUT);
1948 ns_grab_scq_lock(card, scq, flags);
1953 tsr.word_1 = ns_tsr_mkword_1(NS_TSR_INTENABLE);
1955 scdi = NS_TSR_SCDISVBR;
1957 scdi = (vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE;
1958 scqi = scq->next - scq->base;
1959 tsr.word_2 = ns_tsr_mkword_2(scdi, scqi);
1960 tsr.word_3 = 0x00000000;
1961 tsr.word_4 = 0x00000000;
1965 scq->skb[index] = NULL;
1966 XPRINTK("nicstar%d: TSR written:\n0x%x\n0x%x\n0x%x\n0x%x\n at 0x%x.\n",
1967 card->index, le32_to_cpu(tsr.word_1), le32_to_cpu(tsr.word_2),
1968 le32_to_cpu(tsr.word_3), le32_to_cpu(tsr.word_4),
1970 if (scq->next == scq->last)
1971 scq->next = scq->base;
1978 PRINTK("nicstar%d: Timeout pushing TSR.\n", card->index);
1980 data = (u32) virt_to_bus(scq->next);
1981 ns_write_sram(card, scq->scd, &data, 1);
1983 spin_unlock_irqrestore(&scq->lock, flags);
1990 static void process_tsq(ns_dev *card)
1994 ns_tsi *previous = NULL, *one_ahead, *two_ahead;
1995 int serviced_entries; /* flag indicating at least on entry was serviced */
1997 serviced_entries = 0;
1999 if (card->tsq.next == card->tsq.last)
2000 one_ahead = card->tsq.base;
2002 one_ahead = card->tsq.next + 1;
2004 if (one_ahead == card->tsq.last)
2005 two_ahead = card->tsq.base;
2007 two_ahead = one_ahead + 1;
2009 while (!ns_tsi_isempty(card->tsq.next) || !ns_tsi_isempty(one_ahead) ||
2010 !ns_tsi_isempty(two_ahead))
2011 /* At most two empty, as stated in the 77201 errata */
2013 serviced_entries = 1;
2015 /* Skip the one or two possible empty entries */
2016 while (ns_tsi_isempty(card->tsq.next)) {
2017 if (card->tsq.next == card->tsq.last)
2018 card->tsq.next = card->tsq.base;
2023 if (!ns_tsi_tmrof(card->tsq.next))
2025 scdi = ns_tsi_getscdindex(card->tsq.next);
2026 if (scdi == NS_TSI_SCDISVBR)
2030 if (card->scd2vc[scdi] == NULL)
2032 printk("nicstar%d: could not find VC from SCD index.\n",
2034 ns_tsi_init(card->tsq.next);
2037 scq = card->scd2vc[scdi]->scq;
2039 drain_scq(card, scq, ns_tsi_getscqpos(card->tsq.next));
2041 wake_up_interruptible(&(scq->scqfull_waitq));
2044 ns_tsi_init(card->tsq.next);
2045 previous = card->tsq.next;
2046 if (card->tsq.next == card->tsq.last)
2047 card->tsq.next = card->tsq.base;
2051 if (card->tsq.next == card->tsq.last)
2052 one_ahead = card->tsq.base;
2054 one_ahead = card->tsq.next + 1;
2056 if (one_ahead == card->tsq.last)
2057 two_ahead = card->tsq.base;
2059 two_ahead = one_ahead + 1;
2062 if (serviced_entries) {
2063 writel((((u32) previous) - ((u32) card->tsq.base)),
2064 card->membase + TSQH);
2070 static void drain_scq(ns_dev *card, scq_info *scq, int pos)
2072 struct atm_vcc *vcc;
2073 struct sk_buff *skb;
2075 unsigned long flags;
2077 XPRINTK("nicstar%d: drain_scq() called, scq at 0x%x, pos %d.\n",
2078 card->index, (u32) scq, pos);
2079 if (pos >= scq->num_entries)
2081 printk("nicstar%d: Bad index on drain_scq().\n", card->index);
2085 ns_grab_scq_lock(card, scq, flags);
2086 i = (int) (scq->tail - scq->base);
2087 if (++i == scq->num_entries)
2092 XPRINTK("nicstar%d: freeing skb at 0x%x (index %d).\n",
2093 card->index, (u32) skb, i);
2096 vcc = ATM_SKB(skb)->vcc;
2097 if (vcc && vcc->pop != NULL) {
2100 dev_kfree_skb_irq(skb);
2104 if (++i == scq->num_entries)
2107 scq->tail = scq->base + pos;
2108 spin_unlock_irqrestore(&scq->lock, flags);
2113 static void process_rsq(ns_dev *card)
2117 if (!ns_rsqe_valid(card->rsq.next))
2119 while (ns_rsqe_valid(card->rsq.next))
2121 dequeue_rx(card, card->rsq.next);
2122 ns_rsqe_init(card->rsq.next);
2123 previous = card->rsq.next;
2124 if (card->rsq.next == card->rsq.last)
2125 card->rsq.next = card->rsq.base;
2129 writel((((u32) previous) - ((u32) card->rsq.base)),
2130 card->membase + RSQH);
2135 static void dequeue_rx(ns_dev *card, ns_rsqe *rsqe)
2139 struct sk_buff *iovb;
2141 struct atm_vcc *vcc;
2142 struct sk_buff *skb;
2143 unsigned short aal5_len;
2147 stat = readl(card->membase + STAT);
2148 card->sbfqc = ns_stat_sfbqc_get(stat);
2149 card->lbfqc = ns_stat_lfbqc_get(stat);
2151 skb = (struct sk_buff *) le32_to_cpu(rsqe->buffer_handle);
2152 vpi = ns_rsqe_vpi(rsqe);
2153 vci = ns_rsqe_vci(rsqe);
2154 if (vpi >= 1UL << card->vpibits || vci >= 1UL << card->vcibits)
2156 printk("nicstar%d: SDU received for out-of-range vc %d.%d.\n",
2157 card->index, vpi, vci);
2158 recycle_rx_buf(card, skb);
2162 vc = &(card->vcmap[vpi << card->vcibits | vci]);
2165 RXPRINTK("nicstar%d: SDU received on non-rx vc %d.%d.\n",
2166 card->index, vpi, vci);
2167 recycle_rx_buf(card, skb);
2173 if (vcc->qos.aal == ATM_AAL0)
2176 unsigned char *cell;
2180 for (i = ns_rsqe_cellcount(rsqe); i; i--)
2182 if ((sb = dev_alloc_skb(NS_SMSKBSIZE)) == NULL)
2184 printk("nicstar%d: Can't allocate buffers for aal0.\n",
2186 atomic_add(i,&vcc->stats->rx_drop);
2189 if (!atm_charge(vcc, sb->truesize))
2191 RXPRINTK("nicstar%d: atm_charge() dropped aal0 packets.\n",
2193 atomic_add(i-1,&vcc->stats->rx_drop); /* already increased by 1 */
2194 dev_kfree_skb_any(sb);
2197 /* Rebuild the header */
2198 *((u32 *) sb->data) = le32_to_cpu(rsqe->word_1) << 4 |
2199 (ns_rsqe_clp(rsqe) ? 0x00000001 : 0x00000000);
2200 if (i == 1 && ns_rsqe_eopdu(rsqe))
2201 *((u32 *) sb->data) |= 0x00000002;
2202 skb_put(sb, NS_AAL0_HEADER);
2203 memcpy(sb->tail, cell, ATM_CELL_PAYLOAD);
2204 skb_put(sb, ATM_CELL_PAYLOAD);
2205 ATM_SKB(sb)->vcc = vcc;
2206 do_gettimeofday(&sb->stamp);
2208 atomic_inc(&vcc->stats->rx);
2209 cell += ATM_CELL_PAYLOAD;
2212 recycle_rx_buf(card, skb);
2216 /* To reach this point, the AAL layer can only be AAL5 */
2218 if ((iovb = vc->rx_iov) == NULL)
2220 iovb = skb_dequeue(&(card->iovpool.queue));
2221 if (iovb == NULL) /* No buffers in the queue */
2223 iovb = alloc_skb(NS_IOVBUFSIZE, GFP_ATOMIC);
2226 printk("nicstar%d: Out of iovec buffers.\n", card->index);
2227 atomic_inc(&vcc->stats->rx_drop);
2228 recycle_rx_buf(card, skb);
2233 if (--card->iovpool.count < card->iovnr.min)
2235 struct sk_buff *new_iovb;
2236 if ((new_iovb = alloc_skb(NS_IOVBUFSIZE, GFP_ATOMIC)) != NULL)
2238 skb_queue_tail(&card->iovpool.queue, new_iovb);
2239 card->iovpool.count++;
2243 NS_SKB(iovb)->iovcnt = 0;
2245 iovb->tail = iovb->data = iovb->head;
2246 NS_SKB(iovb)->vcc = vcc;
2247 /* IMPORTANT: a pointer to the sk_buff containing the small or large
2248 buffer is stored as iovec base, NOT a pointer to the
2249 small or large buffer itself. */
2251 else if (NS_SKB(iovb)->iovcnt >= NS_MAX_IOVECS)
2253 printk("nicstar%d: received too big AAL5 SDU.\n", card->index);
2254 atomic_inc(&vcc->stats->rx_err);
2255 recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data, NS_MAX_IOVECS);
2256 NS_SKB(iovb)->iovcnt = 0;
2258 iovb->tail = iovb->data = iovb->head;
2259 NS_SKB(iovb)->vcc = vcc;
2261 iov = &((struct iovec *) iovb->data)[NS_SKB(iovb)->iovcnt++];
2262 iov->iov_base = (void *) skb;
2263 iov->iov_len = ns_rsqe_cellcount(rsqe) * 48;
2264 iovb->len += iov->iov_len;
2266 if (NS_SKB(iovb)->iovcnt == 1)
2268 if (skb->list != &card->sbpool.queue)
2270 printk("nicstar%d: Expected a small buffer, and this is not one.\n",
2272 which_list(card, skb);
2273 atomic_inc(&vcc->stats->rx_err);
2274 recycle_rx_buf(card, skb);
2276 recycle_iov_buf(card, iovb);
2280 else /* NS_SKB(iovb)->iovcnt >= 2 */
2282 if (skb->list != &card->lbpool.queue)
2284 printk("nicstar%d: Expected a large buffer, and this is not one.\n",
2286 which_list(card, skb);
2287 atomic_inc(&vcc->stats->rx_err);
2288 recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data,
2289 NS_SKB(iovb)->iovcnt);
2291 recycle_iov_buf(card, iovb);
2296 if (ns_rsqe_eopdu(rsqe))
2298 /* This works correctly regardless of the endianness of the host */
2299 unsigned char *L1L2 = (unsigned char *)((u32)skb->data +
2301 aal5_len = L1L2[0] << 8 | L1L2[1];
2302 len = (aal5_len == 0x0000) ? 0x10000 : aal5_len;
2303 if (ns_rsqe_crcerr(rsqe) ||
2304 len + 8 > iovb->len || len + (47 + 8) < iovb->len)
2306 printk("nicstar%d: AAL5 CRC error", card->index);
2307 if (len + 8 > iovb->len || len + (47 + 8) < iovb->len)
2308 printk(" - PDU size mismatch.\n");
2311 atomic_inc(&vcc->stats->rx_err);
2312 recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data,
2313 NS_SKB(iovb)->iovcnt);
2315 recycle_iov_buf(card, iovb);
2319 /* By this point we (hopefully) have a complete SDU without errors. */
2321 if (NS_SKB(iovb)->iovcnt == 1) /* Just a small buffer */
2323 /* skb points to a small buffer */
2324 if (!atm_charge(vcc, skb->truesize))
2326 push_rxbufs(card, BUF_SM, (u32) skb, (u32) virt_to_bus(skb->data),
2328 atomic_inc(&vcc->stats->rx_drop);
2333 dequeue_sm_buf(card, skb);
2334 #ifdef NS_USE_DESTRUCTORS
2335 skb->destructor = ns_sb_destructor;
2336 #endif /* NS_USE_DESTRUCTORS */
2337 ATM_SKB(skb)->vcc = vcc;
2338 do_gettimeofday(&skb->stamp);
2339 vcc->push(vcc, skb);
2340 atomic_inc(&vcc->stats->rx);
2343 else if (NS_SKB(iovb)->iovcnt == 2) /* One small plus one large buffer */
2347 sb = (struct sk_buff *) (iov - 1)->iov_base;
2348 /* skb points to a large buffer */
2350 if (len <= NS_SMBUFSIZE)
2352 if (!atm_charge(vcc, sb->truesize))
2354 push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data),
2356 atomic_inc(&vcc->stats->rx_drop);
2361 dequeue_sm_buf(card, sb);
2362 #ifdef NS_USE_DESTRUCTORS
2363 sb->destructor = ns_sb_destructor;
2364 #endif /* NS_USE_DESTRUCTORS */
2365 ATM_SKB(sb)->vcc = vcc;
2366 do_gettimeofday(&sb->stamp);
2368 atomic_inc(&vcc->stats->rx);
2371 push_rxbufs(card, BUF_LG, (u32) skb,
2372 (u32) virt_to_bus(skb->data), 0, 0);
2375 else /* len > NS_SMBUFSIZE, the usual case */
2377 if (!atm_charge(vcc, skb->truesize))
2379 push_rxbufs(card, BUF_LG, (u32) skb,
2380 (u32) virt_to_bus(skb->data), 0, 0);
2381 atomic_inc(&vcc->stats->rx_drop);
2385 dequeue_lg_buf(card, skb);
2386 #ifdef NS_USE_DESTRUCTORS
2387 skb->destructor = ns_lb_destructor;
2388 #endif /* NS_USE_DESTRUCTORS */
2389 skb_push(skb, NS_SMBUFSIZE);
2390 memcpy(skb->data, sb->data, NS_SMBUFSIZE);
2391 skb_put(skb, len - NS_SMBUFSIZE);
2392 ATM_SKB(skb)->vcc = vcc;
2393 do_gettimeofday(&skb->stamp);
2394 vcc->push(vcc, skb);
2395 atomic_inc(&vcc->stats->rx);
2398 push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data),
2404 else /* Must push a huge buffer */
2406 struct sk_buff *hb, *sb, *lb;
2407 int remaining, tocopy;
2410 hb = skb_dequeue(&(card->hbpool.queue));
2411 if (hb == NULL) /* No buffers in the queue */
2414 hb = dev_alloc_skb(NS_HBUFSIZE);
2417 printk("nicstar%d: Out of huge buffers.\n", card->index);
2418 atomic_inc(&vcc->stats->rx_drop);
2419 recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data,
2420 NS_SKB(iovb)->iovcnt);
2422 recycle_iov_buf(card, iovb);
2425 else if (card->hbpool.count < card->hbnr.min)
2427 struct sk_buff *new_hb;
2428 if ((new_hb = dev_alloc_skb(NS_HBUFSIZE)) != NULL)
2430 skb_queue_tail(&card->hbpool.queue, new_hb);
2431 card->hbpool.count++;
2436 if (--card->hbpool.count < card->hbnr.min)
2438 struct sk_buff *new_hb;
2439 if ((new_hb = dev_alloc_skb(NS_HBUFSIZE)) != NULL)
2441 skb_queue_tail(&card->hbpool.queue, new_hb);
2442 card->hbpool.count++;
2444 if (card->hbpool.count < card->hbnr.min)
2446 if ((new_hb = dev_alloc_skb(NS_HBUFSIZE)) != NULL)
2448 skb_queue_tail(&card->hbpool.queue, new_hb);
2449 card->hbpool.count++;
2454 iov = (struct iovec *) iovb->data;
2456 if (!atm_charge(vcc, hb->truesize))
2458 recycle_iovec_rx_bufs(card, iov, NS_SKB(iovb)->iovcnt);
2459 if (card->hbpool.count < card->hbnr.max)
2461 skb_queue_tail(&card->hbpool.queue, hb);
2462 card->hbpool.count++;
2465 dev_kfree_skb_any(hb);
2466 atomic_inc(&vcc->stats->rx_drop);
2470 /* Copy the small buffer to the huge buffer */
2471 sb = (struct sk_buff *) iov->iov_base;
2472 memcpy(hb->data, sb->data, iov->iov_len);
2473 skb_put(hb, iov->iov_len);
2474 remaining = len - iov->iov_len;
2476 /* Free the small buffer */
2477 push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data),
2480 /* Copy all large buffers to the huge buffer and free them */
2481 for (j = 1; j < NS_SKB(iovb)->iovcnt; j++)
2483 lb = (struct sk_buff *) iov->iov_base;
2484 tocopy = min_t(int, remaining, iov->iov_len);
2485 memcpy(hb->tail, lb->data, tocopy);
2486 skb_put(hb, tocopy);
2488 remaining -= tocopy;
2489 push_rxbufs(card, BUF_LG, (u32) lb,
2490 (u32) virt_to_bus(lb->data), 0, 0);
2493 if (remaining != 0 || hb->len != len)
2494 printk("nicstar%d: Huge buffer len mismatch.\n", card->index);
2495 #endif /* EXTRA_DEBUG */
2496 ATM_SKB(hb)->vcc = vcc;
2497 #ifdef NS_USE_DESTRUCTORS
2498 hb->destructor = ns_hb_destructor;
2499 #endif /* NS_USE_DESTRUCTORS */
2500 do_gettimeofday(&hb->stamp);
2502 atomic_inc(&vcc->stats->rx);
2507 recycle_iov_buf(card, iovb);
2514 #ifdef NS_USE_DESTRUCTORS
2516 static void ns_sb_destructor(struct sk_buff *sb)
2521 card = (ns_dev *) ATM_SKB(sb)->vcc->dev->dev_data;
2522 stat = readl(card->membase + STAT);
2523 card->sbfqc = ns_stat_sfbqc_get(stat);
2524 card->lbfqc = ns_stat_lfbqc_get(stat);
2528 sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
2531 skb_queue_tail(&card->sbpool.queue, sb);
2532 skb_reserve(sb, NS_AAL0_HEADER);
2533 push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data), 0, 0);
2534 } while (card->sbfqc < card->sbnr.min);
2539 static void ns_lb_destructor(struct sk_buff *lb)
2544 card = (ns_dev *) ATM_SKB(lb)->vcc->dev->dev_data;
2545 stat = readl(card->membase + STAT);
2546 card->sbfqc = ns_stat_sfbqc_get(stat);
2547 card->lbfqc = ns_stat_lfbqc_get(stat);
2551 lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
2554 skb_queue_tail(&card->lbpool.queue, lb);
2555 skb_reserve(lb, NS_SMBUFSIZE);
2556 push_rxbufs(card, BUF_LG, (u32) lb, (u32) virt_to_bus(lb->data), 0, 0);
2557 } while (card->lbfqc < card->lbnr.min);
2562 static void ns_hb_destructor(struct sk_buff *hb)
2566 card = (ns_dev *) ATM_SKB(hb)->vcc->dev->dev_data;
2568 while (card->hbpool.count < card->hbnr.init)
2570 hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
2573 skb_queue_tail(&card->hbpool.queue, hb);
2574 card->hbpool.count++;
2578 #endif /* NS_USE_DESTRUCTORS */
2582 static void recycle_rx_buf(ns_dev *card, struct sk_buff *skb)
2584 if (skb->list == &card->sbpool.queue)
2585 push_rxbufs(card, BUF_SM, (u32) skb, (u32) virt_to_bus(skb->data), 0, 0);
2586 else if (skb->list == &card->lbpool.queue)
2587 push_rxbufs(card, BUF_LG, (u32) skb, (u32) virt_to_bus(skb->data), 0, 0);
2590 printk("nicstar%d: What kind of rx buffer is this?\n", card->index);
2591 dev_kfree_skb_any(skb);
2597 static void recycle_iovec_rx_bufs(ns_dev *card, struct iovec *iov, int count)
2599 struct sk_buff *skb;
2601 for (; count > 0; count--)
2603 skb = (struct sk_buff *) (iov++)->iov_base;
2604 if (skb->list == &card->sbpool.queue)
2605 push_rxbufs(card, BUF_SM, (u32) skb, (u32) virt_to_bus(skb->data),
2607 else if (skb->list == &card->lbpool.queue)
2608 push_rxbufs(card, BUF_LG, (u32) skb, (u32) virt_to_bus(skb->data),
2612 printk("nicstar%d: What kind of rx buffer is this?\n", card->index);
2613 dev_kfree_skb_any(skb);
2620 static void recycle_iov_buf(ns_dev *card, struct sk_buff *iovb)
2622 if (card->iovpool.count < card->iovnr.max)
2624 skb_queue_tail(&card->iovpool.queue, iovb);
2625 card->iovpool.count++;
2628 dev_kfree_skb_any(iovb);
2633 static void dequeue_sm_buf(ns_dev *card, struct sk_buff *sb)
2636 #ifdef NS_USE_DESTRUCTORS
2637 if (card->sbfqc < card->sbnr.min)
2639 if (card->sbfqc < card->sbnr.init)
2641 struct sk_buff *new_sb;
2642 if ((new_sb = dev_alloc_skb(NS_SMSKBSIZE)) != NULL)
2644 skb_queue_tail(&card->sbpool.queue, new_sb);
2645 skb_reserve(new_sb, NS_AAL0_HEADER);
2646 push_rxbufs(card, BUF_SM, (u32) new_sb,
2647 (u32) virt_to_bus(new_sb->data), 0, 0);
2650 if (card->sbfqc < card->sbnr.init)
2651 #endif /* NS_USE_DESTRUCTORS */
2653 struct sk_buff *new_sb;
2654 if ((new_sb = dev_alloc_skb(NS_SMSKBSIZE)) != NULL)
2656 skb_queue_tail(&card->sbpool.queue, new_sb);
2657 skb_reserve(new_sb, NS_AAL0_HEADER);
2658 push_rxbufs(card, BUF_SM, (u32) new_sb,
2659 (u32) virt_to_bus(new_sb->data), 0, 0);
2666 static void dequeue_lg_buf(ns_dev *card, struct sk_buff *lb)
2669 #ifdef NS_USE_DESTRUCTORS
2670 if (card->lbfqc < card->lbnr.min)
2672 if (card->lbfqc < card->lbnr.init)
2674 struct sk_buff *new_lb;
2675 if ((new_lb = dev_alloc_skb(NS_LGSKBSIZE)) != NULL)
2677 skb_queue_tail(&card->lbpool.queue, new_lb);
2678 skb_reserve(new_lb, NS_SMBUFSIZE);
2679 push_rxbufs(card, BUF_LG, (u32) new_lb,
2680 (u32) virt_to_bus(new_lb->data), 0, 0);
2683 if (card->lbfqc < card->lbnr.init)
2684 #endif /* NS_USE_DESTRUCTORS */
2686 struct sk_buff *new_lb;
2687 if ((new_lb = dev_alloc_skb(NS_LGSKBSIZE)) != NULL)
2689 skb_queue_tail(&card->lbpool.queue, new_lb);
2690 skb_reserve(new_lb, NS_SMBUFSIZE);
2691 push_rxbufs(card, BUF_LG, (u32) new_lb,
2692 (u32) virt_to_bus(new_lb->data), 0, 0);
2699 static int ns_proc_read(struct atm_dev *dev, loff_t *pos, char *page)
2706 card = (ns_dev *) dev->dev_data;
2707 stat = readl(card->membase + STAT);
2709 return sprintf(page, "Pool count min init max \n");
2711 return sprintf(page, "Small %5d %5d %5d %5d \n",
2712 ns_stat_sfbqc_get(stat), card->sbnr.min, card->sbnr.init,
2715 return sprintf(page, "Large %5d %5d %5d %5d \n",
2716 ns_stat_lfbqc_get(stat), card->lbnr.min, card->lbnr.init,
2719 return sprintf(page, "Huge %5d %5d %5d %5d \n", card->hbpool.count,
2720 card->hbnr.min, card->hbnr.init, card->hbnr.max);
2722 return sprintf(page, "Iovec %5d %5d %5d %5d \n", card->iovpool.count,
2723 card->iovnr.min, card->iovnr.init, card->iovnr.max);
2727 retval = sprintf(page, "Interrupt counter: %u \n", card->intcnt);
2732 /* Dump 25.6 Mbps PHY registers */
2733 /* Now there's a 25.6 Mbps PHY driver this code isn't needed. I left it
2734 here just in case it's needed for debugging. */
2735 if (card->max_pcr == ATM_25_PCR && !left--)
2740 for (i = 0; i < 4; i++)
2742 while (CMD_BUSY(card));
2743 writel(NS_CMD_READ_UTILITY | 0x00000200 | i, card->membase + CMD);
2744 while (CMD_BUSY(card));
2745 phy_regs[i] = readl(card->membase + DR0) & 0x000000FF;
2748 return sprintf(page, "PHY regs: 0x%02X 0x%02X 0x%02X 0x%02X \n",
2749 phy_regs[0], phy_regs[1], phy_regs[2], phy_regs[3]);
2751 #endif /* 0 - Dump 25.6 Mbps PHY registers */
2754 if (left-- < NS_TST_NUM_ENTRIES)
2756 if (card->tste2vc[left + 1] == NULL)
2757 return sprintf(page, "%5d - VBR/UBR \n", left + 1);
2759 return sprintf(page, "%5d - %d %d \n", left + 1,
2760 card->tste2vc[left + 1]->tx_vcc->vpi,
2761 card->tste2vc[left + 1]->tx_vcc->vci);
2769 static int ns_ioctl(struct atm_dev *dev, unsigned int cmd, void __user *arg)
2774 unsigned long flags;
2776 card = dev->dev_data;
2780 if (get_user(pl.buftype, &((pool_levels __user *) arg)->buftype))
2784 case NS_BUFTYPE_SMALL:
2785 pl.count = ns_stat_sfbqc_get(readl(card->membase + STAT));
2786 pl.level.min = card->sbnr.min;
2787 pl.level.init = card->sbnr.init;
2788 pl.level.max = card->sbnr.max;
2791 case NS_BUFTYPE_LARGE:
2792 pl.count = ns_stat_lfbqc_get(readl(card->membase + STAT));
2793 pl.level.min = card->lbnr.min;
2794 pl.level.init = card->lbnr.init;
2795 pl.level.max = card->lbnr.max;
2798 case NS_BUFTYPE_HUGE:
2799 pl.count = card->hbpool.count;
2800 pl.level.min = card->hbnr.min;
2801 pl.level.init = card->hbnr.init;
2802 pl.level.max = card->hbnr.max;
2805 case NS_BUFTYPE_IOVEC:
2806 pl.count = card->iovpool.count;
2807 pl.level.min = card->iovnr.min;
2808 pl.level.init = card->iovnr.init;
2809 pl.level.max = card->iovnr.max;
2813 return -ENOIOCTLCMD;
2816 if (!copy_to_user((pool_levels __user *) arg, &pl, sizeof(pl)))
2817 return (sizeof(pl));
2822 if (!capable(CAP_NET_ADMIN))
2824 if (copy_from_user(&pl, (pool_levels __user *) arg, sizeof(pl)))
2826 if (pl.level.min >= pl.level.init || pl.level.init >= pl.level.max)
2828 if (pl.level.min == 0)
2832 case NS_BUFTYPE_SMALL:
2833 if (pl.level.max > TOP_SB)
2835 card->sbnr.min = pl.level.min;
2836 card->sbnr.init = pl.level.init;
2837 card->sbnr.max = pl.level.max;
2840 case NS_BUFTYPE_LARGE:
2841 if (pl.level.max > TOP_LB)
2843 card->lbnr.min = pl.level.min;
2844 card->lbnr.init = pl.level.init;
2845 card->lbnr.max = pl.level.max;
2848 case NS_BUFTYPE_HUGE:
2849 if (pl.level.max > TOP_HB)
2851 card->hbnr.min = pl.level.min;
2852 card->hbnr.init = pl.level.init;
2853 card->hbnr.max = pl.level.max;
2856 case NS_BUFTYPE_IOVEC:
2857 if (pl.level.max > TOP_IOVB)
2859 card->iovnr.min = pl.level.min;
2860 card->iovnr.init = pl.level.init;
2861 card->iovnr.max = pl.level.max;
2871 if (!capable(CAP_NET_ADMIN))
2873 btype = (int) arg; /* an int is the same size as a pointer */
2876 case NS_BUFTYPE_SMALL:
2877 while (card->sbfqc < card->sbnr.init)
2881 sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
2884 skb_queue_tail(&card->sbpool.queue, sb);
2885 skb_reserve(sb, NS_AAL0_HEADER);
2886 push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data), 0, 0);
2890 case NS_BUFTYPE_LARGE:
2891 while (card->lbfqc < card->lbnr.init)
2895 lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
2898 skb_queue_tail(&card->lbpool.queue, lb);
2899 skb_reserve(lb, NS_SMBUFSIZE);
2900 push_rxbufs(card, BUF_LG, (u32) lb, (u32) virt_to_bus(lb->data), 0, 0);
2904 case NS_BUFTYPE_HUGE:
2905 while (card->hbpool.count > card->hbnr.init)
2909 ns_grab_int_lock(card, flags);
2910 hb = skb_dequeue(&card->hbpool.queue);
2911 card->hbpool.count--;
2912 spin_unlock_irqrestore(&card->int_lock, flags);
2914 printk("nicstar%d: huge buffer count inconsistent.\n",
2917 dev_kfree_skb_any(hb);
2920 while (card->hbpool.count < card->hbnr.init)
2924 hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
2927 ns_grab_int_lock(card, flags);
2928 skb_queue_tail(&card->hbpool.queue, hb);
2929 card->hbpool.count++;
2930 spin_unlock_irqrestore(&card->int_lock, flags);
2934 case NS_BUFTYPE_IOVEC:
2935 while (card->iovpool.count > card->iovnr.init)
2937 struct sk_buff *iovb;
2939 ns_grab_int_lock(card, flags);
2940 iovb = skb_dequeue(&card->iovpool.queue);
2941 card->iovpool.count--;
2942 spin_unlock_irqrestore(&card->int_lock, flags);
2944 printk("nicstar%d: iovec buffer count inconsistent.\n",
2947 dev_kfree_skb_any(iovb);
2950 while (card->iovpool.count < card->iovnr.init)
2952 struct sk_buff *iovb;
2954 iovb = alloc_skb(NS_IOVBUFSIZE, GFP_KERNEL);
2957 ns_grab_int_lock(card, flags);
2958 skb_queue_tail(&card->iovpool.queue, iovb);
2959 card->iovpool.count++;
2960 spin_unlock_irqrestore(&card->int_lock, flags);
2971 if (dev->phy && dev->phy->ioctl) {
2972 return dev->phy->ioctl(dev, cmd, arg);
2975 printk("nicstar%d: %s == NULL \n", card->index,
2976 dev->phy ? "dev->phy->ioctl" : "dev->phy");
2977 return -ENOIOCTLCMD;
2984 static void which_list(ns_dev *card, struct sk_buff *skb)
2986 printk("It's a %s buffer.\n", skb->list == &card->sbpool.queue ?
2987 "small" : skb->list == &card->lbpool.queue ? "large" :
2988 skb->list == &card->hbpool.queue ? "huge" :
2989 skb->list == &card->iovpool.queue ? "iovec" : "unknown");
2994 static void ns_poll(unsigned long arg)
2998 unsigned long flags;
3001 PRINTK("nicstar: Entering ns_poll().\n");
3002 for (i = 0; i < num_cards; i++)
3005 if (spin_is_locked(&card->int_lock)) {
3006 /* Probably it isn't worth spinning */
3009 ns_grab_int_lock(card, flags);
3012 stat_r = readl(card->membase + STAT);
3013 if (stat_r & NS_STAT_TSIF)
3014 stat_w |= NS_STAT_TSIF;
3015 if (stat_r & NS_STAT_EOPDU)
3016 stat_w |= NS_STAT_EOPDU;
3021 writel(stat_w, card->membase + STAT);
3022 spin_unlock_irqrestore(&card->int_lock, flags);
3024 mod_timer(&ns_timer, jiffies + NS_POLL_PERIOD);
3025 PRINTK("nicstar: Leaving ns_poll().\n");
3030 static int ns_parse_mac(char *mac, unsigned char *esi)
3035 if (mac == NULL || esi == NULL)
3038 for (i = 0; i < 6; i++)
3040 if ((byte1 = ns_h2i(mac[j++])) < 0)
3042 if ((byte0 = ns_h2i(mac[j++])) < 0)
3044 esi[i] = (unsigned char) (byte1 * 16 + byte0);
3047 if (mac[j++] != ':')
3056 static short ns_h2i(char c)
3058 if (c >= '0' && c <= '9')
3059 return (short) (c - '0');
3060 if (c >= 'A' && c <= 'F')
3061 return (short) (c - 'A' + 10);
3062 if (c >= 'a' && c <= 'f')
3063 return (short) (c - 'a' + 10);
3069 static void ns_phy_put(struct atm_dev *dev, unsigned char value,
3073 unsigned long flags;
3075 card = dev->dev_data;
3076 ns_grab_res_lock(card, flags);
3077 while(CMD_BUSY(card));
3078 writel((unsigned long) value, card->membase + DR0);
3079 writel(NS_CMD_WRITE_UTILITY | 0x00000200 | (addr & 0x000000FF),
3080 card->membase + CMD);
3081 spin_unlock_irqrestore(&card->res_lock, flags);
3086 static unsigned char ns_phy_get(struct atm_dev *dev, unsigned long addr)
3089 unsigned long flags;
3092 card = dev->dev_data;
3093 ns_grab_res_lock(card, flags);
3094 while(CMD_BUSY(card));
3095 writel(NS_CMD_READ_UTILITY | 0x00000200 | (addr & 0x000000FF),
3096 card->membase + CMD);
3097 while(CMD_BUSY(card));
3098 data = readl(card->membase + DR0) & 0x000000FF;
3099 spin_unlock_irqrestore(&card->res_lock, flags);
3100 return (unsigned char) data;
3105 module_init(nicstar_init);
3106 module_exit(nicstar_cleanup);