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)
129 /* Function declarations ******************************************************/
131 static u32 ns_read_sram(ns_dev *card, u32 sram_address);
132 static void ns_write_sram(ns_dev *card, u32 sram_address, u32 *value, int count);
133 static int __devinit ns_init_card(int i, struct pci_dev *pcidev);
134 static void __devinit ns_init_card_error(ns_dev *card, int error);
135 static scq_info *get_scq(int size, u32 scd);
136 static void free_scq(scq_info *scq, struct atm_vcc *vcc);
137 static void push_rxbufs(ns_dev *, struct sk_buff *);
138 static irqreturn_t ns_irq_handler(int irq, void *dev_id);
139 static int ns_open(struct atm_vcc *vcc);
140 static void ns_close(struct atm_vcc *vcc);
141 static void fill_tst(ns_dev *card, int n, vc_map *vc);
142 static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb);
143 static int push_scqe(ns_dev *card, vc_map *vc, scq_info *scq, ns_scqe *tbd,
144 struct sk_buff *skb);
145 static void process_tsq(ns_dev *card);
146 static void drain_scq(ns_dev *card, scq_info *scq, int pos);
147 static void process_rsq(ns_dev *card);
148 static void dequeue_rx(ns_dev *card, ns_rsqe *rsqe);
149 #ifdef NS_USE_DESTRUCTORS
150 static void ns_sb_destructor(struct sk_buff *sb);
151 static void ns_lb_destructor(struct sk_buff *lb);
152 static void ns_hb_destructor(struct sk_buff *hb);
153 #endif /* NS_USE_DESTRUCTORS */
154 static void recycle_rx_buf(ns_dev *card, struct sk_buff *skb);
155 static void recycle_iovec_rx_bufs(ns_dev *card, struct iovec *iov, int count);
156 static void recycle_iov_buf(ns_dev *card, struct sk_buff *iovb);
157 static void dequeue_sm_buf(ns_dev *card, struct sk_buff *sb);
158 static void dequeue_lg_buf(ns_dev *card, struct sk_buff *lb);
159 static int ns_proc_read(struct atm_dev *dev, loff_t *pos, char *page);
160 static int ns_ioctl(struct atm_dev *dev, unsigned int cmd, void __user *arg);
161 static void which_list(ns_dev *card, struct sk_buff *skb);
162 static void ns_poll(unsigned long arg);
163 static int ns_parse_mac(char *mac, unsigned char *esi);
164 static short ns_h2i(char c);
165 static void ns_phy_put(struct atm_dev *dev, unsigned char value,
167 static unsigned char ns_phy_get(struct atm_dev *dev, unsigned long addr);
171 /* Global variables ***********************************************************/
173 static struct ns_dev *cards[NS_MAX_CARDS];
174 static unsigned num_cards;
175 static struct atmdev_ops atm_ops =
181 .phy_put = ns_phy_put,
182 .phy_get = ns_phy_get,
183 .proc_read = ns_proc_read,
184 .owner = THIS_MODULE,
186 static struct timer_list ns_timer;
187 static char *mac[NS_MAX_CARDS];
188 module_param_array(mac, charp, NULL, 0);
189 MODULE_LICENSE("GPL");
192 /* Functions*******************************************************************/
194 static int __devinit nicstar_init_one(struct pci_dev *pcidev,
195 const struct pci_device_id *ent)
197 static int index = -1;
203 error = ns_init_card(index, pcidev);
205 cards[index--] = NULL; /* don't increment index */
216 static void __devexit nicstar_remove_one(struct pci_dev *pcidev)
219 ns_dev *card = pci_get_drvdata(pcidev);
221 struct sk_buff *iovb;
227 if (cards[i] == NULL)
230 if (card->atmdev->phy && card->atmdev->phy->stop)
231 card->atmdev->phy->stop(card->atmdev);
233 /* Stop everything */
234 writel(0x00000000, card->membase + CFG);
236 /* De-register device */
237 atm_dev_deregister(card->atmdev);
239 /* Disable PCI device */
240 pci_disable_device(pcidev);
242 /* Free up resources */
244 PRINTK("nicstar%d: freeing %d huge buffers.\n", i, card->hbpool.count);
245 while ((hb = skb_dequeue(&card->hbpool.queue)) != NULL)
247 dev_kfree_skb_any(hb);
250 PRINTK("nicstar%d: %d huge buffers freed.\n", i, j);
252 PRINTK("nicstar%d: freeing %d iovec buffers.\n", i, card->iovpool.count);
253 while ((iovb = skb_dequeue(&card->iovpool.queue)) != NULL)
255 dev_kfree_skb_any(iovb);
258 PRINTK("nicstar%d: %d iovec buffers freed.\n", i, j);
259 while ((lb = skb_dequeue(&card->lbpool.queue)) != NULL)
260 dev_kfree_skb_any(lb);
261 while ((sb = skb_dequeue(&card->sbpool.queue)) != NULL)
262 dev_kfree_skb_any(sb);
263 free_scq(card->scq0, NULL);
264 for (j = 0; j < NS_FRSCD_NUM; j++)
266 if (card->scd2vc[j] != NULL)
267 free_scq(card->scd2vc[j]->scq, card->scd2vc[j]->tx_vcc);
269 kfree(card->rsq.org);
270 kfree(card->tsq.org);
271 free_irq(card->pcidev->irq, card);
272 iounmap(card->membase);
278 static struct pci_device_id nicstar_pci_tbl[] __devinitdata =
280 {PCI_VENDOR_ID_IDT, PCI_DEVICE_ID_IDT_IDT77201,
281 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
282 {0,} /* terminate list */
284 MODULE_DEVICE_TABLE(pci, nicstar_pci_tbl);
288 static struct pci_driver nicstar_driver = {
290 .id_table = nicstar_pci_tbl,
291 .probe = nicstar_init_one,
292 .remove = __devexit_p(nicstar_remove_one),
297 static int __init nicstar_init(void)
299 unsigned error = 0; /* Initialized to remove compile warning */
301 XPRINTK("nicstar: nicstar_init() called.\n");
303 error = pci_register_driver(&nicstar_driver);
305 TXPRINTK("nicstar: TX debug enabled.\n");
306 RXPRINTK("nicstar: RX debug enabled.\n");
307 PRINTK("nicstar: General debug enabled.\n");
309 printk("nicstar: using PHY loopback.\n");
310 #endif /* PHY_LOOPBACK */
311 XPRINTK("nicstar: nicstar_init() returned.\n");
314 init_timer(&ns_timer);
315 ns_timer.expires = jiffies + NS_POLL_PERIOD;
317 ns_timer.function = ns_poll;
318 add_timer(&ns_timer);
326 static void __exit nicstar_cleanup(void)
328 XPRINTK("nicstar: nicstar_cleanup() called.\n");
330 del_timer(&ns_timer);
332 pci_unregister_driver(&nicstar_driver);
334 XPRINTK("nicstar: nicstar_cleanup() returned.\n");
339 static u32 ns_read_sram(ns_dev *card, u32 sram_address)
344 sram_address &= 0x0007FFFC; /* address must be dword aligned */
345 sram_address |= 0x50000000; /* SRAM read command */
346 spin_lock_irqsave(&card->res_lock, flags);
347 while (CMD_BUSY(card));
348 writel(sram_address, card->membase + CMD);
349 while (CMD_BUSY(card));
350 data = readl(card->membase + DR0);
351 spin_unlock_irqrestore(&card->res_lock, flags);
357 static void ns_write_sram(ns_dev *card, u32 sram_address, u32 *value, int count)
361 count--; /* count range now is 0..3 instead of 1..4 */
363 c <<= 2; /* to use increments of 4 */
364 spin_lock_irqsave(&card->res_lock, flags);
365 while (CMD_BUSY(card));
366 for (i = 0; i <= c; i += 4)
367 writel(*(value++), card->membase + i);
368 /* Note: DR# registers are the first 4 dwords in nicstar's memspace,
369 so card->membase + DR0 == card->membase */
371 sram_address &= 0x0007FFFC;
372 sram_address |= (0x40000000 | count);
373 writel(sram_address, card->membase + CMD);
374 spin_unlock_irqrestore(&card->res_lock, flags);
378 static int __devinit ns_init_card(int i, struct pci_dev *pcidev)
381 struct ns_dev *card = NULL;
382 unsigned char pci_latency;
388 unsigned long membase;
392 if (pci_enable_device(pcidev))
394 printk("nicstar%d: can't enable PCI device\n", i);
396 ns_init_card_error(card, error);
400 if ((card = kmalloc(sizeof(ns_dev), GFP_KERNEL)) == NULL)
402 printk("nicstar%d: can't allocate memory for device structure.\n", i);
404 ns_init_card_error(card, error);
408 spin_lock_init(&card->int_lock);
409 spin_lock_init(&card->res_lock);
411 pci_set_drvdata(pcidev, card);
415 card->pcidev = pcidev;
416 membase = pci_resource_start(pcidev, 1);
417 card->membase = ioremap(membase, NS_IOREMAP_SIZE);
420 printk("nicstar%d: can't ioremap() membase.\n",i);
422 ns_init_card_error(card, error);
425 PRINTK("nicstar%d: membase at 0x%x.\n", i, card->membase);
427 pci_set_master(pcidev);
429 if (pci_read_config_byte(pcidev, PCI_LATENCY_TIMER, &pci_latency) != 0)
431 printk("nicstar%d: can't read PCI latency timer.\n", i);
433 ns_init_card_error(card, error);
436 #ifdef NS_PCI_LATENCY
437 if (pci_latency < NS_PCI_LATENCY)
439 PRINTK("nicstar%d: setting PCI latency timer to %d.\n", i, NS_PCI_LATENCY);
440 for (j = 1; j < 4; j++)
442 if (pci_write_config_byte(pcidev, PCI_LATENCY_TIMER, NS_PCI_LATENCY) != 0)
447 printk("nicstar%d: can't set PCI latency timer to %d.\n", i, NS_PCI_LATENCY);
449 ns_init_card_error(card, error);
453 #endif /* NS_PCI_LATENCY */
455 /* Clear timer overflow */
456 data = readl(card->membase + STAT);
457 if (data & NS_STAT_TMROF)
458 writel(NS_STAT_TMROF, card->membase + STAT);
461 writel(NS_CFG_SWRST, card->membase + CFG);
463 writel(0x00000000, card->membase + CFG);
466 writel(0x00000008, card->membase + GP);
468 writel(0x00000001, card->membase + GP);
470 while (CMD_BUSY(card));
471 writel(NS_CMD_WRITE_UTILITY | 0x00000100, card->membase + CMD); /* Sync UTOPIA with SAR clock */
474 /* Detect PHY type */
475 while (CMD_BUSY(card));
476 writel(NS_CMD_READ_UTILITY | 0x00000200, card->membase + CMD);
477 while (CMD_BUSY(card));
478 data = readl(card->membase + DR0);
481 printk("nicstar%d: PHY seems to be 25 Mbps.\n", i);
482 card->max_pcr = ATM_25_PCR;
483 while(CMD_BUSY(card));
484 writel(0x00000008, card->membase + DR0);
485 writel(NS_CMD_WRITE_UTILITY | 0x00000200, card->membase + CMD);
486 /* Clear an eventual pending interrupt */
487 writel(NS_STAT_SFBQF, card->membase + STAT);
489 while(CMD_BUSY(card));
490 writel(0x00000022, card->membase + DR0);
491 writel(NS_CMD_WRITE_UTILITY | 0x00000202, card->membase + CMD);
492 #endif /* PHY_LOOPBACK */
496 printk("nicstar%d: PHY seems to be 155 Mbps.\n", i);
497 card->max_pcr = ATM_OC3_PCR;
499 while(CMD_BUSY(card));
500 writel(0x00000002, card->membase + DR0);
501 writel(NS_CMD_WRITE_UTILITY | 0x00000205, card->membase + CMD);
502 #endif /* PHY_LOOPBACK */
505 printk("nicstar%d: unknown PHY type (0x%08X).\n", i, data);
507 ns_init_card_error(card, error);
510 writel(0x00000000, card->membase + GP);
512 /* Determine SRAM size */
514 ns_write_sram(card, 0x1C003, &data, 1);
516 ns_write_sram(card, 0x14003, &data, 1);
517 if (ns_read_sram(card, 0x14003) == 0x89ABCDEF &&
518 ns_read_sram(card, 0x1C003) == 0x76543210)
519 card->sram_size = 128;
521 card->sram_size = 32;
522 PRINTK("nicstar%d: %dK x 32bit SRAM size.\n", i, card->sram_size);
524 card->rct_size = NS_MAX_RCTSIZE;
526 #if (NS_MAX_RCTSIZE == 4096)
527 if (card->sram_size == 128)
528 printk("nicstar%d: limiting maximum VCI. See NS_MAX_RCTSIZE in nicstar.h\n", i);
529 #elif (NS_MAX_RCTSIZE == 16384)
530 if (card->sram_size == 32)
532 printk("nicstar%d: wasting memory. See NS_MAX_RCTSIZE in nicstar.h\n", i);
533 card->rct_size = 4096;
536 #error NS_MAX_RCTSIZE must be either 4096 or 16384 in nicstar.c
539 card->vpibits = NS_VPIBITS;
540 if (card->rct_size == 4096)
541 card->vcibits = 12 - NS_VPIBITS;
542 else /* card->rct_size == 16384 */
543 card->vcibits = 14 - NS_VPIBITS;
545 /* Initialize the nicstar eeprom/eprom stuff, for the MAC addr */
547 nicstar_init_eprom(card->membase);
549 /* Set the VPI/VCI MSb mask to zero so we can receive OAM cells */
550 writel(0x00000000, card->membase + VPM);
553 card->tsq.org = kmalloc(NS_TSQSIZE + NS_TSQ_ALIGNMENT, GFP_KERNEL);
554 if (card->tsq.org == NULL)
556 printk("nicstar%d: can't allocate TSQ.\n", i);
558 ns_init_card_error(card, error);
561 card->tsq.base = (ns_tsi *) ALIGN_ADDRESS(card->tsq.org, NS_TSQ_ALIGNMENT);
562 card->tsq.next = card->tsq.base;
563 card->tsq.last = card->tsq.base + (NS_TSQ_NUM_ENTRIES - 1);
564 for (j = 0; j < NS_TSQ_NUM_ENTRIES; j++)
565 ns_tsi_init(card->tsq.base + j);
566 writel(0x00000000, card->membase + TSQH);
567 writel((u32) virt_to_bus(card->tsq.base), card->membase + TSQB);
568 PRINTK("nicstar%d: TSQ base at 0x%x 0x%x 0x%x.\n", i, (u32) card->tsq.base,
569 (u32) virt_to_bus(card->tsq.base), readl(card->membase + TSQB));
572 card->rsq.org = kmalloc(NS_RSQSIZE + NS_RSQ_ALIGNMENT, GFP_KERNEL);
573 if (card->rsq.org == NULL)
575 printk("nicstar%d: can't allocate RSQ.\n", i);
577 ns_init_card_error(card, error);
580 card->rsq.base = (ns_rsqe *) ALIGN_ADDRESS(card->rsq.org, NS_RSQ_ALIGNMENT);
581 card->rsq.next = card->rsq.base;
582 card->rsq.last = card->rsq.base + (NS_RSQ_NUM_ENTRIES - 1);
583 for (j = 0; j < NS_RSQ_NUM_ENTRIES; j++)
584 ns_rsqe_init(card->rsq.base + j);
585 writel(0x00000000, card->membase + RSQH);
586 writel((u32) virt_to_bus(card->rsq.base), card->membase + RSQB);
587 PRINTK("nicstar%d: RSQ base at 0x%x.\n", i, (u32) card->rsq.base);
589 /* Initialize SCQ0, the only VBR SCQ used */
592 card->scq0 = get_scq(VBR_SCQSIZE, NS_VRSCD0);
593 if (card->scq0 == NULL)
595 printk("nicstar%d: can't get SCQ0.\n", i);
597 ns_init_card_error(card, error);
600 u32d[0] = (u32) virt_to_bus(card->scq0->base);
601 u32d[1] = (u32) 0x00000000;
602 u32d[2] = (u32) 0xffffffff;
603 u32d[3] = (u32) 0x00000000;
604 ns_write_sram(card, NS_VRSCD0, u32d, 4);
605 ns_write_sram(card, NS_VRSCD1, u32d, 4); /* These last two won't be used */
606 ns_write_sram(card, NS_VRSCD2, u32d, 4); /* but are initialized, just in case... */
607 card->scq0->scd = NS_VRSCD0;
608 PRINTK("nicstar%d: VBR-SCQ0 base at 0x%x.\n", i, (u32) card->scq0->base);
610 /* Initialize TSTs */
611 card->tst_addr = NS_TST0;
612 card->tst_free_entries = NS_TST_NUM_ENTRIES;
613 data = NS_TST_OPCODE_VARIABLE;
614 for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
615 ns_write_sram(card, NS_TST0 + j, &data, 1);
616 data = ns_tste_make(NS_TST_OPCODE_END, NS_TST0);
617 ns_write_sram(card, NS_TST0 + NS_TST_NUM_ENTRIES, &data, 1);
618 for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
619 ns_write_sram(card, NS_TST1 + j, &data, 1);
620 data = ns_tste_make(NS_TST_OPCODE_END, NS_TST1);
621 ns_write_sram(card, NS_TST1 + NS_TST_NUM_ENTRIES, &data, 1);
622 for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
623 card->tste2vc[j] = NULL;
624 writel(NS_TST0 << 2, card->membase + TSTB);
627 /* Initialize RCT. AAL type is set on opening the VC. */
629 u32d[0] = NS_RCTE_RAWCELLINTEN;
631 u32d[0] = 0x00000000;
632 #endif /* RCQ_SUPPORT */
633 u32d[1] = 0x00000000;
634 u32d[2] = 0x00000000;
635 u32d[3] = 0xFFFFFFFF;
636 for (j = 0; j < card->rct_size; j++)
637 ns_write_sram(card, j * 4, u32d, 4);
639 memset(card->vcmap, 0, NS_MAX_RCTSIZE * sizeof(vc_map));
641 for (j = 0; j < NS_FRSCD_NUM; j++)
642 card->scd2vc[j] = NULL;
644 /* Initialize buffer levels */
645 card->sbnr.min = MIN_SB;
646 card->sbnr.init = NUM_SB;
647 card->sbnr.max = MAX_SB;
648 card->lbnr.min = MIN_LB;
649 card->lbnr.init = NUM_LB;
650 card->lbnr.max = MAX_LB;
651 card->iovnr.min = MIN_IOVB;
652 card->iovnr.init = NUM_IOVB;
653 card->iovnr.max = MAX_IOVB;
654 card->hbnr.min = MIN_HB;
655 card->hbnr.init = NUM_HB;
656 card->hbnr.max = MAX_HB;
658 card->sm_handle = 0x00000000;
659 card->sm_addr = 0x00000000;
660 card->lg_handle = 0x00000000;
661 card->lg_addr = 0x00000000;
663 card->efbie = 1; /* To prevent push_rxbufs from enabling the interrupt */
665 /* Pre-allocate some huge buffers */
666 skb_queue_head_init(&card->hbpool.queue);
667 card->hbpool.count = 0;
668 for (j = 0; j < NUM_HB; j++)
671 hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
674 printk("nicstar%d: can't allocate %dth of %d huge buffers.\n",
677 ns_init_card_error(card, error);
680 NS_SKB_CB(hb)->buf_type = BUF_NONE;
681 skb_queue_tail(&card->hbpool.queue, hb);
682 card->hbpool.count++;
686 /* Allocate large buffers */
687 skb_queue_head_init(&card->lbpool.queue);
688 card->lbpool.count = 0; /* Not used */
689 for (j = 0; j < NUM_LB; j++)
692 lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
695 printk("nicstar%d: can't allocate %dth of %d large buffers.\n",
698 ns_init_card_error(card, error);
701 NS_SKB_CB(lb)->buf_type = BUF_LG;
702 skb_queue_tail(&card->lbpool.queue, lb);
703 skb_reserve(lb, NS_SMBUFSIZE);
704 push_rxbufs(card, lb);
705 /* Due to the implementation of push_rxbufs() this is 1, not 0 */
709 card->rawch = (u32) virt_to_bus(lb->data);
712 /* Test for strange behaviour which leads to crashes */
713 if ((bcount = ns_stat_lfbqc_get(readl(card->membase + STAT))) < card->lbnr.min)
715 printk("nicstar%d: Strange... Just allocated %d large buffers and lfbqc = %d.\n",
718 ns_init_card_error(card, error);
723 /* Allocate small buffers */
724 skb_queue_head_init(&card->sbpool.queue);
725 card->sbpool.count = 0; /* Not used */
726 for (j = 0; j < NUM_SB; j++)
729 sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
732 printk("nicstar%d: can't allocate %dth of %d small buffers.\n",
735 ns_init_card_error(card, error);
738 NS_SKB_CB(sb)->buf_type = BUF_SM;
739 skb_queue_tail(&card->sbpool.queue, sb);
740 skb_reserve(sb, NS_AAL0_HEADER);
741 push_rxbufs(card, sb);
743 /* Test for strange behaviour which leads to crashes */
744 if ((bcount = ns_stat_sfbqc_get(readl(card->membase + STAT))) < card->sbnr.min)
746 printk("nicstar%d: Strange... Just allocated %d small buffers and sfbqc = %d.\n",
749 ns_init_card_error(card, error);
754 /* Allocate iovec buffers */
755 skb_queue_head_init(&card->iovpool.queue);
756 card->iovpool.count = 0;
757 for (j = 0; j < NUM_IOVB; j++)
759 struct sk_buff *iovb;
760 iovb = alloc_skb(NS_IOVBUFSIZE, GFP_KERNEL);
763 printk("nicstar%d: can't allocate %dth of %d iovec buffers.\n",
766 ns_init_card_error(card, error);
769 NS_SKB_CB(iovb)->buf_type = BUF_NONE;
770 skb_queue_tail(&card->iovpool.queue, iovb);
771 card->iovpool.count++;
774 /* Configure NICStAR */
775 if (card->rct_size == 4096)
776 ns_cfg_rctsize = NS_CFG_RCTSIZE_4096_ENTRIES;
777 else /* (card->rct_size == 16384) */
778 ns_cfg_rctsize = NS_CFG_RCTSIZE_16384_ENTRIES;
783 if (request_irq(pcidev->irq, &ns_irq_handler, IRQF_DISABLED | IRQF_SHARED, "nicstar", card) != 0)
785 printk("nicstar%d: can't allocate IRQ %d.\n", i, pcidev->irq);
787 ns_init_card_error(card, error);
791 /* Register device */
792 card->atmdev = atm_dev_register("nicstar", &atm_ops, -1, NULL);
793 if (card->atmdev == NULL)
795 printk("nicstar%d: can't register device.\n", i);
797 ns_init_card_error(card, error);
801 if (ns_parse_mac(mac[i], card->atmdev->esi)) {
802 nicstar_read_eprom(card->membase, NICSTAR_EPROM_MAC_ADDR_OFFSET,
803 card->atmdev->esi, 6);
804 if (memcmp(card->atmdev->esi, "\x00\x00\x00\x00\x00\x00", 6) == 0) {
805 nicstar_read_eprom(card->membase, NICSTAR_EPROM_MAC_ADDR_OFFSET_ALT,
806 card->atmdev->esi, 6);
810 printk("nicstar%d: MAC address %pM\n", i, card->atmdev->esi);
812 card->atmdev->dev_data = card;
813 card->atmdev->ci_range.vpi_bits = card->vpibits;
814 card->atmdev->ci_range.vci_bits = card->vcibits;
815 card->atmdev->link_rate = card->max_pcr;
816 card->atmdev->phy = NULL;
818 #ifdef CONFIG_ATM_NICSTAR_USE_SUNI
819 if (card->max_pcr == ATM_OC3_PCR)
820 suni_init(card->atmdev);
821 #endif /* CONFIG_ATM_NICSTAR_USE_SUNI */
823 #ifdef CONFIG_ATM_NICSTAR_USE_IDT77105
824 if (card->max_pcr == ATM_25_PCR)
825 idt77105_init(card->atmdev);
826 #endif /* CONFIG_ATM_NICSTAR_USE_IDT77105 */
828 if (card->atmdev->phy && card->atmdev->phy->start)
829 card->atmdev->phy->start(card->atmdev);
831 writel(NS_CFG_RXPATH |
838 NS_CFG_RXINT_NODELAY |
839 NS_CFG_RAWIE | /* Only enabled if RCQ_SUPPORT */
843 NS_CFG_TSQFIE_OPT | /* Only enabled if ENABLE_TSQFIE */
845 card->membase + CFG);
854 static void __devinit ns_init_card_error(ns_dev *card, int error)
858 writel(0x00000000, card->membase + CFG);
862 struct sk_buff *iovb;
863 while ((iovb = skb_dequeue(&card->iovpool.queue)) != NULL)
864 dev_kfree_skb_any(iovb);
869 while ((sb = skb_dequeue(&card->sbpool.queue)) != NULL)
870 dev_kfree_skb_any(sb);
871 free_scq(card->scq0, NULL);
876 while ((lb = skb_dequeue(&card->lbpool.queue)) != NULL)
877 dev_kfree_skb_any(lb);
882 while ((hb = skb_dequeue(&card->hbpool.queue)) != NULL)
883 dev_kfree_skb_any(hb);
887 kfree(card->rsq.org);
891 kfree(card->tsq.org);
895 free_irq(card->pcidev->irq, card);
899 iounmap(card->membase);
903 pci_disable_device(card->pcidev);
910 static scq_info *get_scq(int size, u32 scd)
915 if (size != VBR_SCQSIZE && size != CBR_SCQSIZE)
918 scq = kmalloc(sizeof(scq_info), GFP_KERNEL);
921 scq->org = kmalloc(2 * size, GFP_KERNEL);
922 if (scq->org == NULL)
927 scq->skb = kmalloc(sizeof(struct sk_buff *) *
928 (size / NS_SCQE_SIZE), GFP_KERNEL);
929 if (scq->skb == NULL)
935 scq->num_entries = size / NS_SCQE_SIZE;
936 scq->base = (ns_scqe *) ALIGN_ADDRESS(scq->org, size);
937 scq->next = scq->base;
938 scq->last = scq->base + (scq->num_entries - 1);
939 scq->tail = scq->last;
941 scq->num_entries = size / NS_SCQE_SIZE;
943 init_waitqueue_head(&scq->scqfull_waitq);
945 spin_lock_init(&scq->lock);
947 for (i = 0; i < scq->num_entries; i++)
955 /* For variable rate SCQ vcc must be NULL */
956 static void free_scq(scq_info *scq, struct atm_vcc *vcc)
960 if (scq->num_entries == VBR_SCQ_NUM_ENTRIES)
961 for (i = 0; i < scq->num_entries; i++)
963 if (scq->skb[i] != NULL)
965 vcc = ATM_SKB(scq->skb[i])->vcc;
966 if (vcc->pop != NULL)
967 vcc->pop(vcc, scq->skb[i]);
969 dev_kfree_skb_any(scq->skb[i]);
972 else /* vcc must be != NULL */
976 printk("nicstar: free_scq() called with vcc == NULL for fixed rate scq.");
977 for (i = 0; i < scq->num_entries; i++)
978 dev_kfree_skb_any(scq->skb[i]);
981 for (i = 0; i < scq->num_entries; i++)
983 if (scq->skb[i] != NULL)
985 if (vcc->pop != NULL)
986 vcc->pop(vcc, scq->skb[i]);
988 dev_kfree_skb_any(scq->skb[i]);
999 /* The handles passed must be pointers to the sk_buff containing the small
1000 or large buffer(s) cast to u32. */
1001 static void push_rxbufs(ns_dev *card, struct sk_buff *skb)
1003 struct ns_skb_cb *cb = NS_SKB_CB(skb);
1007 unsigned long flags;
1010 handle2 = addr2 = 0;
1012 addr1 = (u32)virt_to_bus(skb->data);
1014 #ifdef GENERAL_DEBUG
1016 printk("nicstar%d: push_rxbufs called with addr1 = 0.\n", card->index);
1017 #endif /* GENERAL_DEBUG */
1019 stat = readl(card->membase + STAT);
1020 card->sbfqc = ns_stat_sfbqc_get(stat);
1021 card->lbfqc = ns_stat_lfbqc_get(stat);
1022 if (cb->buf_type == BUF_SM)
1028 addr2 = card->sm_addr;
1029 handle2 = card->sm_handle;
1030 card->sm_addr = 0x00000000;
1031 card->sm_handle = 0x00000000;
1033 else /* (!sm_addr) */
1035 card->sm_addr = addr1;
1036 card->sm_handle = handle1;
1040 else /* buf_type == BUF_LG */
1046 addr2 = card->lg_addr;
1047 handle2 = card->lg_handle;
1048 card->lg_addr = 0x00000000;
1049 card->lg_handle = 0x00000000;
1051 else /* (!lg_addr) */
1053 card->lg_addr = addr1;
1054 card->lg_handle = handle1;
1061 if (cb->buf_type == BUF_SM)
1063 if (card->sbfqc >= card->sbnr.max)
1065 skb_unlink((struct sk_buff *) handle1, &card->sbpool.queue);
1066 dev_kfree_skb_any((struct sk_buff *) handle1);
1067 skb_unlink((struct sk_buff *) handle2, &card->sbpool.queue);
1068 dev_kfree_skb_any((struct sk_buff *) handle2);
1074 else /* (buf_type == BUF_LG) */
1076 if (card->lbfqc >= card->lbnr.max)
1078 skb_unlink((struct sk_buff *) handle1, &card->lbpool.queue);
1079 dev_kfree_skb_any((struct sk_buff *) handle1);
1080 skb_unlink((struct sk_buff *) handle2, &card->lbpool.queue);
1081 dev_kfree_skb_any((struct sk_buff *) handle2);
1088 spin_lock_irqsave(&card->res_lock, flags);
1090 while (CMD_BUSY(card));
1091 writel(addr2, card->membase + DR3);
1092 writel(handle2, card->membase + DR2);
1093 writel(addr1, card->membase + DR1);
1094 writel(handle1, card->membase + DR0);
1095 writel(NS_CMD_WRITE_FREEBUFQ | cb->buf_type, card->membase + CMD);
1097 spin_unlock_irqrestore(&card->res_lock, flags);
1099 XPRINTK("nicstar%d: Pushing %s buffers at 0x%x and 0x%x.\n", card->index,
1100 (cb->buf_type == BUF_SM ? "small" : "large"), addr1, addr2);
1103 if (!card->efbie && card->sbfqc >= card->sbnr.min &&
1104 card->lbfqc >= card->lbnr.min)
1107 writel((readl(card->membase + CFG) | NS_CFG_EFBIE), card->membase + CFG);
1115 static irqreturn_t ns_irq_handler(int irq, void *dev_id)
1119 struct atm_dev *dev;
1120 unsigned long flags;
1122 card = (ns_dev *) dev_id;
1126 PRINTK("nicstar%d: NICStAR generated an interrupt\n", card->index);
1128 spin_lock_irqsave(&card->int_lock, flags);
1130 stat_r = readl(card->membase + STAT);
1132 /* Transmit Status Indicator has been written to T. S. Queue */
1133 if (stat_r & NS_STAT_TSIF)
1135 TXPRINTK("nicstar%d: TSI interrupt\n", card->index);
1137 writel(NS_STAT_TSIF, card->membase + STAT);
1140 /* Incomplete CS-PDU has been transmitted */
1141 if (stat_r & NS_STAT_TXICP)
1143 writel(NS_STAT_TXICP, card->membase + STAT);
1144 TXPRINTK("nicstar%d: Incomplete CS-PDU transmitted.\n",
1148 /* Transmit Status Queue 7/8 full */
1149 if (stat_r & NS_STAT_TSQF)
1151 writel(NS_STAT_TSQF, card->membase + STAT);
1152 PRINTK("nicstar%d: TSQ full.\n", card->index);
1156 /* Timer overflow */
1157 if (stat_r & NS_STAT_TMROF)
1159 writel(NS_STAT_TMROF, card->membase + STAT);
1160 PRINTK("nicstar%d: Timer overflow.\n", card->index);
1163 /* PHY device interrupt signal active */
1164 if (stat_r & NS_STAT_PHYI)
1166 writel(NS_STAT_PHYI, card->membase + STAT);
1167 PRINTK("nicstar%d: PHY interrupt.\n", card->index);
1168 if (dev->phy && dev->phy->interrupt) {
1169 dev->phy->interrupt(dev);
1173 /* Small Buffer Queue is full */
1174 if (stat_r & NS_STAT_SFBQF)
1176 writel(NS_STAT_SFBQF, card->membase + STAT);
1177 printk("nicstar%d: Small free buffer queue is full.\n", card->index);
1180 /* Large Buffer Queue is full */
1181 if (stat_r & NS_STAT_LFBQF)
1183 writel(NS_STAT_LFBQF, card->membase + STAT);
1184 printk("nicstar%d: Large free buffer queue is full.\n", card->index);
1187 /* Receive Status Queue is full */
1188 if (stat_r & NS_STAT_RSQF)
1190 writel(NS_STAT_RSQF, card->membase + STAT);
1191 printk("nicstar%d: RSQ full.\n", card->index);
1195 /* Complete CS-PDU received */
1196 if (stat_r & NS_STAT_EOPDU)
1198 RXPRINTK("nicstar%d: End of CS-PDU received.\n", card->index);
1200 writel(NS_STAT_EOPDU, card->membase + STAT);
1203 /* Raw cell received */
1204 if (stat_r & NS_STAT_RAWCF)
1206 writel(NS_STAT_RAWCF, card->membase + STAT);
1208 printk("nicstar%d: Raw cell received and no support yet...\n",
1210 #endif /* RCQ_SUPPORT */
1211 /* NOTE: the following procedure may keep a raw cell pending until the
1212 next interrupt. As this preliminary support is only meant to
1213 avoid buffer leakage, this is not an issue. */
1214 while (readl(card->membase + RAWCT) != card->rawch)
1218 rawcell = (ns_rcqe *) bus_to_virt(card->rawch);
1219 if (ns_rcqe_islast(rawcell))
1221 struct sk_buff *oldbuf;
1223 oldbuf = card->rcbuf;
1224 card->rcbuf = (struct sk_buff *) ns_rcqe_nextbufhandle(rawcell);
1225 card->rawch = (u32) virt_to_bus(card->rcbuf->data);
1226 recycle_rx_buf(card, oldbuf);
1229 card->rawch += NS_RCQE_SIZE;
1233 /* Small buffer queue is empty */
1234 if (stat_r & NS_STAT_SFBQE)
1239 writel(NS_STAT_SFBQE, card->membase + STAT);
1240 printk("nicstar%d: Small free buffer queue empty.\n",
1242 for (i = 0; i < card->sbnr.min; i++)
1244 sb = dev_alloc_skb(NS_SMSKBSIZE);
1247 writel(readl(card->membase + CFG) & ~NS_CFG_EFBIE, card->membase + CFG);
1251 NS_SKB_CB(sb)->buf_type = BUF_SM;
1252 skb_queue_tail(&card->sbpool.queue, sb);
1253 skb_reserve(sb, NS_AAL0_HEADER);
1254 push_rxbufs(card, sb);
1260 /* Large buffer queue empty */
1261 if (stat_r & NS_STAT_LFBQE)
1266 writel(NS_STAT_LFBQE, card->membase + STAT);
1267 printk("nicstar%d: Large free buffer queue empty.\n",
1269 for (i = 0; i < card->lbnr.min; i++)
1271 lb = dev_alloc_skb(NS_LGSKBSIZE);
1274 writel(readl(card->membase + CFG) & ~NS_CFG_EFBIE, card->membase + CFG);
1278 NS_SKB_CB(lb)->buf_type = BUF_LG;
1279 skb_queue_tail(&card->lbpool.queue, lb);
1280 skb_reserve(lb, NS_SMBUFSIZE);
1281 push_rxbufs(card, lb);
1287 /* Receive Status Queue is 7/8 full */
1288 if (stat_r & NS_STAT_RSQAF)
1290 writel(NS_STAT_RSQAF, card->membase + STAT);
1291 RXPRINTK("nicstar%d: RSQ almost full.\n", card->index);
1295 spin_unlock_irqrestore(&card->int_lock, flags);
1296 PRINTK("nicstar%d: end of interrupt service\n", card->index);
1302 static int ns_open(struct atm_vcc *vcc)
1306 unsigned long tmpl, modl;
1307 int tcr, tcra; /* target cell rate, and absolute value */
1308 int n = 0; /* Number of entries in the TST. Initialized to remove
1309 the compiler warning. */
1311 int frscdi = 0; /* Index of the SCD. Initialized to remove the compiler
1312 warning. How I wish compilers were clever enough to
1313 tell which variables can truly be used
1315 int inuse; /* tx or rx vc already in use by another vcc */
1316 short vpi = vcc->vpi;
1319 card = (ns_dev *) vcc->dev->dev_data;
1320 PRINTK("nicstar%d: opening vpi.vci %d.%d \n", card->index, (int) vpi, vci);
1321 if (vcc->qos.aal != ATM_AAL5 && vcc->qos.aal != ATM_AAL0)
1323 PRINTK("nicstar%d: unsupported AAL.\n", card->index);
1327 vc = &(card->vcmap[vpi << card->vcibits | vci]);
1331 if (vcc->qos.txtp.traffic_class != ATM_NONE && vc->tx)
1333 if (vcc->qos.rxtp.traffic_class != ATM_NONE && vc->rx)
1337 printk("nicstar%d: %s vci already in use.\n", card->index,
1338 inuse == 1 ? "tx" : inuse == 2 ? "rx" : "tx and rx");
1342 set_bit(ATM_VF_ADDR,&vcc->flags);
1344 /* NOTE: You are not allowed to modify an open connection's QOS. To change
1345 that, remove the ATM_VF_PARTIAL flag checking. There may be other changes
1346 needed to do that. */
1347 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
1351 set_bit(ATM_VF_PARTIAL,&vcc->flags);
1352 if (vcc->qos.txtp.traffic_class == ATM_CBR)
1354 /* Check requested cell rate and availability of SCD */
1355 if (vcc->qos.txtp.max_pcr == 0 && vcc->qos.txtp.pcr == 0 &&
1356 vcc->qos.txtp.min_pcr == 0)
1358 PRINTK("nicstar%d: trying to open a CBR vc with cell rate = 0 \n",
1360 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1361 clear_bit(ATM_VF_ADDR,&vcc->flags);
1365 tcr = atm_pcr_goal(&(vcc->qos.txtp));
1366 tcra = tcr >= 0 ? tcr : -tcr;
1368 PRINTK("nicstar%d: target cell rate = %d.\n", card->index,
1369 vcc->qos.txtp.max_pcr);
1371 tmpl = (unsigned long)tcra * (unsigned long)NS_TST_NUM_ENTRIES;
1372 modl = tmpl % card->max_pcr;
1374 n = (int)(tmpl / card->max_pcr);
1381 if ((n = (card->tst_free_entries - NS_TST_RESERVED)) <= 0)
1383 PRINTK("nicstar%d: no CBR bandwidth free.\n", card->index);
1384 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1385 clear_bit(ATM_VF_ADDR,&vcc->flags);
1392 printk("nicstar%d: selected bandwidth < granularity.\n", card->index);
1393 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1394 clear_bit(ATM_VF_ADDR,&vcc->flags);
1398 if (n > (card->tst_free_entries - NS_TST_RESERVED))
1400 PRINTK("nicstar%d: not enough free CBR bandwidth.\n", card->index);
1401 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1402 clear_bit(ATM_VF_ADDR,&vcc->flags);
1406 card->tst_free_entries -= n;
1408 XPRINTK("nicstar%d: writing %d tst entries.\n", card->index, n);
1409 for (frscdi = 0; frscdi < NS_FRSCD_NUM; frscdi++)
1411 if (card->scd2vc[frscdi] == NULL)
1413 card->scd2vc[frscdi] = vc;
1417 if (frscdi == NS_FRSCD_NUM)
1419 PRINTK("nicstar%d: no SCD available for CBR channel.\n", card->index);
1420 card->tst_free_entries += n;
1421 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1422 clear_bit(ATM_VF_ADDR,&vcc->flags);
1426 vc->cbr_scd = NS_FRSCD + frscdi * NS_FRSCD_SIZE;
1428 scq = get_scq(CBR_SCQSIZE, vc->cbr_scd);
1431 PRINTK("nicstar%d: can't get fixed rate SCQ.\n", card->index);
1432 card->scd2vc[frscdi] = NULL;
1433 card->tst_free_entries += n;
1434 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1435 clear_bit(ATM_VF_ADDR,&vcc->flags);
1439 u32d[0] = (u32) virt_to_bus(scq->base);
1440 u32d[1] = (u32) 0x00000000;
1441 u32d[2] = (u32) 0xffffffff;
1442 u32d[3] = (u32) 0x00000000;
1443 ns_write_sram(card, vc->cbr_scd, u32d, 4);
1445 fill_tst(card, n, vc);
1447 else if (vcc->qos.txtp.traffic_class == ATM_UBR)
1449 vc->cbr_scd = 0x00000000;
1450 vc->scq = card->scq0;
1453 if (vcc->qos.txtp.traffic_class != ATM_NONE)
1459 if (vcc->qos.rxtp.traffic_class != ATM_NONE)
1467 /* Open the connection in hardware */
1468 if (vcc->qos.aal == ATM_AAL5)
1469 status = NS_RCTE_AAL5 | NS_RCTE_CONNECTOPEN;
1470 else /* vcc->qos.aal == ATM_AAL0 */
1471 status = NS_RCTE_AAL0 | NS_RCTE_CONNECTOPEN;
1473 status |= NS_RCTE_RAWCELLINTEN;
1474 #endif /* RCQ_SUPPORT */
1475 ns_write_sram(card, NS_RCT + (vpi << card->vcibits | vci) *
1476 NS_RCT_ENTRY_SIZE, &status, 1);
1481 set_bit(ATM_VF_READY,&vcc->flags);
1487 static void ns_close(struct atm_vcc *vcc)
1495 card = vcc->dev->dev_data;
1496 PRINTK("nicstar%d: closing vpi.vci %d.%d \n", card->index,
1497 (int) vcc->vpi, vcc->vci);
1499 clear_bit(ATM_VF_READY,&vcc->flags);
1501 if (vcc->qos.rxtp.traffic_class != ATM_NONE)
1504 unsigned long flags;
1506 addr = NS_RCT + (vcc->vpi << card->vcibits | vcc->vci) * NS_RCT_ENTRY_SIZE;
1507 spin_lock_irqsave(&card->res_lock, flags);
1508 while(CMD_BUSY(card));
1509 writel(NS_CMD_CLOSE_CONNECTION | addr << 2, card->membase + CMD);
1510 spin_unlock_irqrestore(&card->res_lock, flags);
1513 if (vc->rx_iov != NULL)
1515 struct sk_buff *iovb;
1518 stat = readl(card->membase + STAT);
1519 card->sbfqc = ns_stat_sfbqc_get(stat);
1520 card->lbfqc = ns_stat_lfbqc_get(stat);
1522 PRINTK("nicstar%d: closing a VC with pending rx buffers.\n",
1525 recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data,
1526 NS_SKB(iovb)->iovcnt);
1527 NS_SKB(iovb)->iovcnt = 0;
1528 NS_SKB(iovb)->vcc = NULL;
1529 spin_lock_irqsave(&card->int_lock, flags);
1530 recycle_iov_buf(card, iovb);
1531 spin_unlock_irqrestore(&card->int_lock, flags);
1536 if (vcc->qos.txtp.traffic_class != ATM_NONE)
1541 if (vcc->qos.txtp.traffic_class == ATM_CBR)
1543 unsigned long flags;
1551 spin_lock_irqsave(&scq->lock, flags);
1553 if (scqep == scq->base)
1557 if (scqep == scq->tail)
1559 spin_unlock_irqrestore(&scq->lock, flags);
1562 /* If the last entry is not a TSR, place one in the SCQ in order to
1563 be able to completely drain it and then close. */
1564 if (!ns_scqe_is_tsr(scqep) && scq->tail != scq->next)
1571 tsr.word_1 = ns_tsr_mkword_1(NS_TSR_INTENABLE);
1572 scdi = (vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE;
1573 scqi = scq->next - scq->base;
1574 tsr.word_2 = ns_tsr_mkword_2(scdi, scqi);
1575 tsr.word_3 = 0x00000000;
1576 tsr.word_4 = 0x00000000;
1579 scq->skb[index] = NULL;
1580 if (scq->next == scq->last)
1581 scq->next = scq->base;
1584 data = (u32) virt_to_bus(scq->next);
1585 ns_write_sram(card, scq->scd, &data, 1);
1587 spin_unlock_irqrestore(&scq->lock, flags);
1591 /* Free all TST entries */
1592 data = NS_TST_OPCODE_VARIABLE;
1593 for (i = 0; i < NS_TST_NUM_ENTRIES; i++)
1595 if (card->tste2vc[i] == vc)
1597 ns_write_sram(card, card->tst_addr + i, &data, 1);
1598 card->tste2vc[i] = NULL;
1599 card->tst_free_entries++;
1603 card->scd2vc[(vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE] = NULL;
1604 free_scq(vc->scq, vcc);
1607 /* remove all references to vcc before deleting it */
1608 if (vcc->qos.txtp.traffic_class != ATM_NONE)
1610 unsigned long flags;
1611 scq_info *scq = card->scq0;
1613 spin_lock_irqsave(&scq->lock, flags);
1615 for(i = 0; i < scq->num_entries; i++) {
1616 if(scq->skb[i] && ATM_SKB(scq->skb[i])->vcc == vcc) {
1617 ATM_SKB(scq->skb[i])->vcc = NULL;
1618 atm_return(vcc, scq->skb[i]->truesize);
1619 PRINTK("nicstar: deleted pending vcc mapping\n");
1623 spin_unlock_irqrestore(&scq->lock, flags);
1626 vcc->dev_data = NULL;
1627 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
1628 clear_bit(ATM_VF_ADDR,&vcc->flags);
1633 stat = readl(card->membase + STAT);
1634 cfg = readl(card->membase + CFG);
1635 printk("STAT = 0x%08X CFG = 0x%08X \n", stat, cfg);
1636 printk("TSQ: base = 0x%08X next = 0x%08X last = 0x%08X TSQT = 0x%08X \n",
1637 (u32) card->tsq.base, (u32) card->tsq.next,(u32) card->tsq.last,
1638 readl(card->membase + TSQT));
1639 printk("RSQ: base = 0x%08X next = 0x%08X last = 0x%08X RSQT = 0x%08X \n",
1640 (u32) card->rsq.base, (u32) card->rsq.next,(u32) card->rsq.last,
1641 readl(card->membase + RSQT));
1642 printk("Empty free buffer queue interrupt %s \n",
1643 card->efbie ? "enabled" : "disabled");
1644 printk("SBCNT = %d count = %d LBCNT = %d count = %d \n",
1645 ns_stat_sfbqc_get(stat), card->sbpool.count,
1646 ns_stat_lfbqc_get(stat), card->lbpool.count);
1647 printk("hbpool.count = %d iovpool.count = %d \n",
1648 card->hbpool.count, card->iovpool.count);
1650 #endif /* RX_DEBUG */
1655 static void fill_tst(ns_dev *card, int n, vc_map *vc)
1662 /* It would be very complicated to keep the two TSTs synchronized while
1663 assuring that writes are only made to the inactive TST. So, for now I
1664 will use only one TST. If problems occur, I will change this again */
1666 new_tst = card->tst_addr;
1668 /* Fill procedure */
1670 for (e = 0; e < NS_TST_NUM_ENTRIES; e++)
1672 if (card->tste2vc[e] == NULL)
1675 if (e == NS_TST_NUM_ENTRIES) {
1676 printk("nicstar%d: No free TST entries found. \n", card->index);
1681 cl = NS_TST_NUM_ENTRIES;
1682 data = ns_tste_make(NS_TST_OPCODE_FIXED, vc->cbr_scd);
1686 if (cl >= NS_TST_NUM_ENTRIES && card->tste2vc[e] == NULL)
1688 card->tste2vc[e] = vc;
1689 ns_write_sram(card, new_tst + e, &data, 1);
1690 cl -= NS_TST_NUM_ENTRIES;
1694 if (++e == NS_TST_NUM_ENTRIES) {
1700 /* End of fill procedure */
1702 data = ns_tste_make(NS_TST_OPCODE_END, new_tst);
1703 ns_write_sram(card, new_tst + NS_TST_NUM_ENTRIES, &data, 1);
1704 ns_write_sram(card, card->tst_addr + NS_TST_NUM_ENTRIES, &data, 1);
1705 card->tst_addr = new_tst;
1710 static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb)
1715 unsigned long buflen;
1717 u32 flags; /* TBD flags, not CPU flags */
1719 card = vcc->dev->dev_data;
1720 TXPRINTK("nicstar%d: ns_send() called.\n", card->index);
1721 if ((vc = (vc_map *) vcc->dev_data) == NULL)
1723 printk("nicstar%d: vcc->dev_data == NULL on ns_send().\n", card->index);
1724 atomic_inc(&vcc->stats->tx_err);
1725 dev_kfree_skb_any(skb);
1731 printk("nicstar%d: Trying to transmit on a non-tx VC.\n", card->index);
1732 atomic_inc(&vcc->stats->tx_err);
1733 dev_kfree_skb_any(skb);
1737 if (vcc->qos.aal != ATM_AAL5 && vcc->qos.aal != ATM_AAL0)
1739 printk("nicstar%d: Only AAL0 and AAL5 are supported.\n", card->index);
1740 atomic_inc(&vcc->stats->tx_err);
1741 dev_kfree_skb_any(skb);
1745 if (skb_shinfo(skb)->nr_frags != 0)
1747 printk("nicstar%d: No scatter-gather yet.\n", card->index);
1748 atomic_inc(&vcc->stats->tx_err);
1749 dev_kfree_skb_any(skb);
1753 ATM_SKB(skb)->vcc = vcc;
1755 if (vcc->qos.aal == ATM_AAL5)
1757 buflen = (skb->len + 47 + 8) / 48 * 48; /* Multiple of 48 */
1758 flags = NS_TBD_AAL5;
1759 scqe.word_2 = cpu_to_le32((u32) virt_to_bus(skb->data));
1760 scqe.word_3 = cpu_to_le32((u32) skb->len);
1761 scqe.word_4 = ns_tbd_mkword_4(0, (u32) vcc->vpi, (u32) vcc->vci, 0,
1762 ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? 1 : 0);
1763 flags |= NS_TBD_EOPDU;
1765 else /* (vcc->qos.aal == ATM_AAL0) */
1767 buflen = ATM_CELL_PAYLOAD; /* i.e., 48 bytes */
1768 flags = NS_TBD_AAL0;
1769 scqe.word_2 = cpu_to_le32((u32) virt_to_bus(skb->data) + NS_AAL0_HEADER);
1770 scqe.word_3 = cpu_to_le32(0x00000000);
1771 if (*skb->data & 0x02) /* Payload type 1 - end of pdu */
1772 flags |= NS_TBD_EOPDU;
1773 scqe.word_4 = cpu_to_le32(*((u32 *) skb->data) & ~NS_TBD_VC_MASK);
1774 /* Force the VPI/VCI to be the same as in VCC struct */
1775 scqe.word_4 |= cpu_to_le32((((u32) vcc->vpi) << NS_TBD_VPI_SHIFT |
1776 ((u32) vcc->vci) << NS_TBD_VCI_SHIFT) &
1780 if (vcc->qos.txtp.traffic_class == ATM_CBR)
1782 scqe.word_1 = ns_tbd_mkword_1_novbr(flags, (u32) buflen);
1783 scq = ((vc_map *) vcc->dev_data)->scq;
1787 scqe.word_1 = ns_tbd_mkword_1(flags, (u32) 1, (u32) 1, (u32) buflen);
1791 if (push_scqe(card, vc, scq, &scqe, skb) != 0)
1793 atomic_inc(&vcc->stats->tx_err);
1794 dev_kfree_skb_any(skb);
1797 atomic_inc(&vcc->stats->tx);
1804 static int push_scqe(ns_dev *card, vc_map *vc, scq_info *scq, ns_scqe *tbd,
1805 struct sk_buff *skb)
1807 unsigned long flags;
1814 spin_lock_irqsave(&scq->lock, flags);
1815 while (scq->tail == scq->next)
1817 if (in_interrupt()) {
1818 spin_unlock_irqrestore(&scq->lock, flags);
1819 printk("nicstar%d: Error pushing TBD.\n", card->index);
1824 spin_unlock_irqrestore(&scq->lock, flags);
1825 interruptible_sleep_on_timeout(&scq->scqfull_waitq, SCQFULL_TIMEOUT);
1826 spin_lock_irqsave(&scq->lock, flags);
1829 spin_unlock_irqrestore(&scq->lock, flags);
1830 printk("nicstar%d: Timeout pushing TBD.\n", card->index);
1835 index = (int) (scq->next - scq->base);
1836 scq->skb[index] = skb;
1837 XPRINTK("nicstar%d: sending skb at 0x%x (pos %d).\n",
1838 card->index, (u32) skb, index);
1839 XPRINTK("nicstar%d: TBD written:\n0x%x\n0x%x\n0x%x\n0x%x\n at 0x%x.\n",
1840 card->index, le32_to_cpu(tbd->word_1), le32_to_cpu(tbd->word_2),
1841 le32_to_cpu(tbd->word_3), le32_to_cpu(tbd->word_4),
1843 if (scq->next == scq->last)
1844 scq->next = scq->base;
1849 if (scq->num_entries == VBR_SCQ_NUM_ENTRIES)
1857 if (vc->tbd_count >= MAX_TBD_PER_VC || scq->tbd_count >= MAX_TBD_PER_SCQ)
1861 while (scq->tail == scq->next)
1863 if (in_interrupt()) {
1864 data = (u32) virt_to_bus(scq->next);
1865 ns_write_sram(card, scq->scd, &data, 1);
1866 spin_unlock_irqrestore(&scq->lock, flags);
1867 printk("nicstar%d: Error pushing TSR.\n", card->index);
1872 if (has_run++) break;
1873 spin_unlock_irqrestore(&scq->lock, flags);
1874 interruptible_sleep_on_timeout(&scq->scqfull_waitq, SCQFULL_TIMEOUT);
1875 spin_lock_irqsave(&scq->lock, flags);
1880 tsr.word_1 = ns_tsr_mkword_1(NS_TSR_INTENABLE);
1882 scdi = NS_TSR_SCDISVBR;
1884 scdi = (vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE;
1885 scqi = scq->next - scq->base;
1886 tsr.word_2 = ns_tsr_mkword_2(scdi, scqi);
1887 tsr.word_3 = 0x00000000;
1888 tsr.word_4 = 0x00000000;
1892 scq->skb[index] = NULL;
1893 XPRINTK("nicstar%d: TSR written:\n0x%x\n0x%x\n0x%x\n0x%x\n at 0x%x.\n",
1894 card->index, le32_to_cpu(tsr.word_1), le32_to_cpu(tsr.word_2),
1895 le32_to_cpu(tsr.word_3), le32_to_cpu(tsr.word_4),
1897 if (scq->next == scq->last)
1898 scq->next = scq->base;
1905 PRINTK("nicstar%d: Timeout pushing TSR.\n", card->index);
1907 data = (u32) virt_to_bus(scq->next);
1908 ns_write_sram(card, scq->scd, &data, 1);
1910 spin_unlock_irqrestore(&scq->lock, flags);
1917 static void process_tsq(ns_dev *card)
1921 ns_tsi *previous = NULL, *one_ahead, *two_ahead;
1922 int serviced_entries; /* flag indicating at least on entry was serviced */
1924 serviced_entries = 0;
1926 if (card->tsq.next == card->tsq.last)
1927 one_ahead = card->tsq.base;
1929 one_ahead = card->tsq.next + 1;
1931 if (one_ahead == card->tsq.last)
1932 two_ahead = card->tsq.base;
1934 two_ahead = one_ahead + 1;
1936 while (!ns_tsi_isempty(card->tsq.next) || !ns_tsi_isempty(one_ahead) ||
1937 !ns_tsi_isempty(two_ahead))
1938 /* At most two empty, as stated in the 77201 errata */
1940 serviced_entries = 1;
1942 /* Skip the one or two possible empty entries */
1943 while (ns_tsi_isempty(card->tsq.next)) {
1944 if (card->tsq.next == card->tsq.last)
1945 card->tsq.next = card->tsq.base;
1950 if (!ns_tsi_tmrof(card->tsq.next))
1952 scdi = ns_tsi_getscdindex(card->tsq.next);
1953 if (scdi == NS_TSI_SCDISVBR)
1957 if (card->scd2vc[scdi] == NULL)
1959 printk("nicstar%d: could not find VC from SCD index.\n",
1961 ns_tsi_init(card->tsq.next);
1964 scq = card->scd2vc[scdi]->scq;
1966 drain_scq(card, scq, ns_tsi_getscqpos(card->tsq.next));
1968 wake_up_interruptible(&(scq->scqfull_waitq));
1971 ns_tsi_init(card->tsq.next);
1972 previous = card->tsq.next;
1973 if (card->tsq.next == card->tsq.last)
1974 card->tsq.next = card->tsq.base;
1978 if (card->tsq.next == card->tsq.last)
1979 one_ahead = card->tsq.base;
1981 one_ahead = card->tsq.next + 1;
1983 if (one_ahead == card->tsq.last)
1984 two_ahead = card->tsq.base;
1986 two_ahead = one_ahead + 1;
1989 if (serviced_entries) {
1990 writel((((u32) previous) - ((u32) card->tsq.base)),
1991 card->membase + TSQH);
1997 static void drain_scq(ns_dev *card, scq_info *scq, int pos)
1999 struct atm_vcc *vcc;
2000 struct sk_buff *skb;
2002 unsigned long flags;
2004 XPRINTK("nicstar%d: drain_scq() called, scq at 0x%x, pos %d.\n",
2005 card->index, (u32) scq, pos);
2006 if (pos >= scq->num_entries)
2008 printk("nicstar%d: Bad index on drain_scq().\n", card->index);
2012 spin_lock_irqsave(&scq->lock, flags);
2013 i = (int) (scq->tail - scq->base);
2014 if (++i == scq->num_entries)
2019 XPRINTK("nicstar%d: freeing skb at 0x%x (index %d).\n",
2020 card->index, (u32) skb, i);
2023 vcc = ATM_SKB(skb)->vcc;
2024 if (vcc && vcc->pop != NULL) {
2027 dev_kfree_skb_irq(skb);
2031 if (++i == scq->num_entries)
2034 scq->tail = scq->base + pos;
2035 spin_unlock_irqrestore(&scq->lock, flags);
2040 static void process_rsq(ns_dev *card)
2044 if (!ns_rsqe_valid(card->rsq.next))
2047 dequeue_rx(card, card->rsq.next);
2048 ns_rsqe_init(card->rsq.next);
2049 previous = card->rsq.next;
2050 if (card->rsq.next == card->rsq.last)
2051 card->rsq.next = card->rsq.base;
2054 } while (ns_rsqe_valid(card->rsq.next));
2055 writel((((u32) previous) - ((u32) card->rsq.base)),
2056 card->membase + RSQH);
2061 static void dequeue_rx(ns_dev *card, ns_rsqe *rsqe)
2065 struct sk_buff *iovb;
2067 struct atm_vcc *vcc;
2068 struct sk_buff *skb;
2069 unsigned short aal5_len;
2073 stat = readl(card->membase + STAT);
2074 card->sbfqc = ns_stat_sfbqc_get(stat);
2075 card->lbfqc = ns_stat_lfbqc_get(stat);
2077 skb = (struct sk_buff *) le32_to_cpu(rsqe->buffer_handle);
2078 vpi = ns_rsqe_vpi(rsqe);
2079 vci = ns_rsqe_vci(rsqe);
2080 if (vpi >= 1UL << card->vpibits || vci >= 1UL << card->vcibits)
2082 printk("nicstar%d: SDU received for out-of-range vc %d.%d.\n",
2083 card->index, vpi, vci);
2084 recycle_rx_buf(card, skb);
2088 vc = &(card->vcmap[vpi << card->vcibits | vci]);
2091 RXPRINTK("nicstar%d: SDU received on non-rx vc %d.%d.\n",
2092 card->index, vpi, vci);
2093 recycle_rx_buf(card, skb);
2099 if (vcc->qos.aal == ATM_AAL0)
2102 unsigned char *cell;
2106 for (i = ns_rsqe_cellcount(rsqe); i; i--)
2108 if ((sb = dev_alloc_skb(NS_SMSKBSIZE)) == NULL)
2110 printk("nicstar%d: Can't allocate buffers for aal0.\n",
2112 atomic_add(i,&vcc->stats->rx_drop);
2115 if (!atm_charge(vcc, sb->truesize))
2117 RXPRINTK("nicstar%d: atm_charge() dropped aal0 packets.\n",
2119 atomic_add(i-1,&vcc->stats->rx_drop); /* already increased by 1 */
2120 dev_kfree_skb_any(sb);
2123 /* Rebuild the header */
2124 *((u32 *) sb->data) = le32_to_cpu(rsqe->word_1) << 4 |
2125 (ns_rsqe_clp(rsqe) ? 0x00000001 : 0x00000000);
2126 if (i == 1 && ns_rsqe_eopdu(rsqe))
2127 *((u32 *) sb->data) |= 0x00000002;
2128 skb_put(sb, NS_AAL0_HEADER);
2129 memcpy(skb_tail_pointer(sb), cell, ATM_CELL_PAYLOAD);
2130 skb_put(sb, ATM_CELL_PAYLOAD);
2131 ATM_SKB(sb)->vcc = vcc;
2132 __net_timestamp(sb);
2134 atomic_inc(&vcc->stats->rx);
2135 cell += ATM_CELL_PAYLOAD;
2138 recycle_rx_buf(card, skb);
2142 /* To reach this point, the AAL layer can only be AAL5 */
2144 if ((iovb = vc->rx_iov) == NULL)
2146 iovb = skb_dequeue(&(card->iovpool.queue));
2147 if (iovb == NULL) /* No buffers in the queue */
2149 iovb = alloc_skb(NS_IOVBUFSIZE, GFP_ATOMIC);
2152 printk("nicstar%d: Out of iovec buffers.\n", card->index);
2153 atomic_inc(&vcc->stats->rx_drop);
2154 recycle_rx_buf(card, skb);
2157 NS_SKB_CB(iovb)->buf_type = BUF_NONE;
2160 if (--card->iovpool.count < card->iovnr.min)
2162 struct sk_buff *new_iovb;
2163 if ((new_iovb = alloc_skb(NS_IOVBUFSIZE, GFP_ATOMIC)) != NULL)
2165 NS_SKB_CB(iovb)->buf_type = BUF_NONE;
2166 skb_queue_tail(&card->iovpool.queue, new_iovb);
2167 card->iovpool.count++;
2171 NS_SKB(iovb)->iovcnt = 0;
2173 iovb->data = iovb->head;
2174 skb_reset_tail_pointer(iovb);
2175 NS_SKB(iovb)->vcc = vcc;
2176 /* IMPORTANT: a pointer to the sk_buff containing the small or large
2177 buffer is stored as iovec base, NOT a pointer to the
2178 small or large buffer itself. */
2180 else if (NS_SKB(iovb)->iovcnt >= NS_MAX_IOVECS)
2182 printk("nicstar%d: received too big AAL5 SDU.\n", card->index);
2183 atomic_inc(&vcc->stats->rx_err);
2184 recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data, NS_MAX_IOVECS);
2185 NS_SKB(iovb)->iovcnt = 0;
2187 iovb->data = iovb->head;
2188 skb_reset_tail_pointer(iovb);
2189 NS_SKB(iovb)->vcc = vcc;
2191 iov = &((struct iovec *) iovb->data)[NS_SKB(iovb)->iovcnt++];
2192 iov->iov_base = (void *) skb;
2193 iov->iov_len = ns_rsqe_cellcount(rsqe) * 48;
2194 iovb->len += iov->iov_len;
2196 if (NS_SKB(iovb)->iovcnt == 1)
2198 if (NS_SKB_CB(skb)->buf_type != BUF_SM)
2200 printk("nicstar%d: Expected a small buffer, and this is not one.\n",
2202 which_list(card, skb);
2203 atomic_inc(&vcc->stats->rx_err);
2204 recycle_rx_buf(card, skb);
2206 recycle_iov_buf(card, iovb);
2210 else /* NS_SKB(iovb)->iovcnt >= 2 */
2212 if (NS_SKB_CB(skb)->buf_type != BUF_LG)
2214 printk("nicstar%d: Expected a large buffer, and this is not one.\n",
2216 which_list(card, skb);
2217 atomic_inc(&vcc->stats->rx_err);
2218 recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data,
2219 NS_SKB(iovb)->iovcnt);
2221 recycle_iov_buf(card, iovb);
2226 if (ns_rsqe_eopdu(rsqe))
2228 /* This works correctly regardless of the endianness of the host */
2229 unsigned char *L1L2 = (unsigned char *)((u32)skb->data +
2231 aal5_len = L1L2[0] << 8 | L1L2[1];
2232 len = (aal5_len == 0x0000) ? 0x10000 : aal5_len;
2233 if (ns_rsqe_crcerr(rsqe) ||
2234 len + 8 > iovb->len || len + (47 + 8) < iovb->len)
2236 printk("nicstar%d: AAL5 CRC error", card->index);
2237 if (len + 8 > iovb->len || len + (47 + 8) < iovb->len)
2238 printk(" - PDU size mismatch.\n");
2241 atomic_inc(&vcc->stats->rx_err);
2242 recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data,
2243 NS_SKB(iovb)->iovcnt);
2245 recycle_iov_buf(card, iovb);
2249 /* By this point we (hopefully) have a complete SDU without errors. */
2251 if (NS_SKB(iovb)->iovcnt == 1) /* Just a small buffer */
2253 /* skb points to a small buffer */
2254 if (!atm_charge(vcc, skb->truesize))
2256 push_rxbufs(card, skb);
2257 atomic_inc(&vcc->stats->rx_drop);
2262 dequeue_sm_buf(card, skb);
2263 #ifdef NS_USE_DESTRUCTORS
2264 skb->destructor = ns_sb_destructor;
2265 #endif /* NS_USE_DESTRUCTORS */
2266 ATM_SKB(skb)->vcc = vcc;
2267 __net_timestamp(skb);
2268 vcc->push(vcc, skb);
2269 atomic_inc(&vcc->stats->rx);
2272 else if (NS_SKB(iovb)->iovcnt == 2) /* One small plus one large buffer */
2276 sb = (struct sk_buff *) (iov - 1)->iov_base;
2277 /* skb points to a large buffer */
2279 if (len <= NS_SMBUFSIZE)
2281 if (!atm_charge(vcc, sb->truesize))
2283 push_rxbufs(card, sb);
2284 atomic_inc(&vcc->stats->rx_drop);
2289 dequeue_sm_buf(card, sb);
2290 #ifdef NS_USE_DESTRUCTORS
2291 sb->destructor = ns_sb_destructor;
2292 #endif /* NS_USE_DESTRUCTORS */
2293 ATM_SKB(sb)->vcc = vcc;
2294 __net_timestamp(sb);
2296 atomic_inc(&vcc->stats->rx);
2299 push_rxbufs(card, skb);
2302 else /* len > NS_SMBUFSIZE, the usual case */
2304 if (!atm_charge(vcc, skb->truesize))
2306 push_rxbufs(card, skb);
2307 atomic_inc(&vcc->stats->rx_drop);
2311 dequeue_lg_buf(card, skb);
2312 #ifdef NS_USE_DESTRUCTORS
2313 skb->destructor = ns_lb_destructor;
2314 #endif /* NS_USE_DESTRUCTORS */
2315 skb_push(skb, NS_SMBUFSIZE);
2316 skb_copy_from_linear_data(sb, skb->data, NS_SMBUFSIZE);
2317 skb_put(skb, len - NS_SMBUFSIZE);
2318 ATM_SKB(skb)->vcc = vcc;
2319 __net_timestamp(skb);
2320 vcc->push(vcc, skb);
2321 atomic_inc(&vcc->stats->rx);
2324 push_rxbufs(card, sb);
2329 else /* Must push a huge buffer */
2331 struct sk_buff *hb, *sb, *lb;
2332 int remaining, tocopy;
2335 hb = skb_dequeue(&(card->hbpool.queue));
2336 if (hb == NULL) /* No buffers in the queue */
2339 hb = dev_alloc_skb(NS_HBUFSIZE);
2342 printk("nicstar%d: Out of huge buffers.\n", card->index);
2343 atomic_inc(&vcc->stats->rx_drop);
2344 recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data,
2345 NS_SKB(iovb)->iovcnt);
2347 recycle_iov_buf(card, iovb);
2350 else if (card->hbpool.count < card->hbnr.min)
2352 struct sk_buff *new_hb;
2353 if ((new_hb = dev_alloc_skb(NS_HBUFSIZE)) != NULL)
2355 skb_queue_tail(&card->hbpool.queue, new_hb);
2356 card->hbpool.count++;
2359 NS_SKB_CB(hb)->buf_type = BUF_NONE;
2362 if (--card->hbpool.count < card->hbnr.min)
2364 struct sk_buff *new_hb;
2365 if ((new_hb = dev_alloc_skb(NS_HBUFSIZE)) != NULL)
2367 NS_SKB_CB(new_hb)->buf_type = BUF_NONE;
2368 skb_queue_tail(&card->hbpool.queue, new_hb);
2369 card->hbpool.count++;
2371 if (card->hbpool.count < card->hbnr.min)
2373 if ((new_hb = dev_alloc_skb(NS_HBUFSIZE)) != NULL)
2375 NS_SKB_CB(new_hb)->buf_type = BUF_NONE;
2376 skb_queue_tail(&card->hbpool.queue, new_hb);
2377 card->hbpool.count++;
2382 iov = (struct iovec *) iovb->data;
2384 if (!atm_charge(vcc, hb->truesize))
2386 recycle_iovec_rx_bufs(card, iov, NS_SKB(iovb)->iovcnt);
2387 if (card->hbpool.count < card->hbnr.max)
2389 skb_queue_tail(&card->hbpool.queue, hb);
2390 card->hbpool.count++;
2393 dev_kfree_skb_any(hb);
2394 atomic_inc(&vcc->stats->rx_drop);
2398 /* Copy the small buffer to the huge buffer */
2399 sb = (struct sk_buff *) iov->iov_base;
2400 skb_copy_from_linear_data(sb, hb->data, iov->iov_len);
2401 skb_put(hb, iov->iov_len);
2402 remaining = len - iov->iov_len;
2404 /* Free the small buffer */
2405 push_rxbufs(card, sb);
2407 /* Copy all large buffers to the huge buffer and free them */
2408 for (j = 1; j < NS_SKB(iovb)->iovcnt; j++)
2410 lb = (struct sk_buff *) iov->iov_base;
2411 tocopy = min_t(int, remaining, iov->iov_len);
2412 skb_copy_from_linear_data(lb, skb_tail_pointer(hb), tocopy);
2413 skb_put(hb, tocopy);
2415 remaining -= tocopy;
2416 push_rxbufs(card, lb);
2419 if (remaining != 0 || hb->len != len)
2420 printk("nicstar%d: Huge buffer len mismatch.\n", card->index);
2421 #endif /* EXTRA_DEBUG */
2422 ATM_SKB(hb)->vcc = vcc;
2423 #ifdef NS_USE_DESTRUCTORS
2424 hb->destructor = ns_hb_destructor;
2425 #endif /* NS_USE_DESTRUCTORS */
2426 __net_timestamp(hb);
2428 atomic_inc(&vcc->stats->rx);
2433 recycle_iov_buf(card, iovb);
2440 #ifdef NS_USE_DESTRUCTORS
2442 static void ns_sb_destructor(struct sk_buff *sb)
2447 card = (ns_dev *) ATM_SKB(sb)->vcc->dev->dev_data;
2448 stat = readl(card->membase + STAT);
2449 card->sbfqc = ns_stat_sfbqc_get(stat);
2450 card->lbfqc = ns_stat_lfbqc_get(stat);
2454 sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
2457 NS_SKB_CB(sb)->buf_type = BUF_SM;
2458 skb_queue_tail(&card->sbpool.queue, sb);
2459 skb_reserve(sb, NS_AAL0_HEADER);
2460 push_rxbufs(card, sb);
2461 } while (card->sbfqc < card->sbnr.min);
2466 static void ns_lb_destructor(struct sk_buff *lb)
2471 card = (ns_dev *) ATM_SKB(lb)->vcc->dev->dev_data;
2472 stat = readl(card->membase + STAT);
2473 card->sbfqc = ns_stat_sfbqc_get(stat);
2474 card->lbfqc = ns_stat_lfbqc_get(stat);
2478 lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
2481 NS_SKB_CB(lb)->buf_type = BUF_LG;
2482 skb_queue_tail(&card->lbpool.queue, lb);
2483 skb_reserve(lb, NS_SMBUFSIZE);
2484 push_rxbufs(card, lb);
2485 } while (card->lbfqc < card->lbnr.min);
2490 static void ns_hb_destructor(struct sk_buff *hb)
2494 card = (ns_dev *) ATM_SKB(hb)->vcc->dev->dev_data;
2496 while (card->hbpool.count < card->hbnr.init)
2498 hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
2501 NS_SKB_CB(hb)->buf_type = BUF_NONE;
2502 skb_queue_tail(&card->hbpool.queue, hb);
2503 card->hbpool.count++;
2507 #endif /* NS_USE_DESTRUCTORS */
2510 static void recycle_rx_buf(ns_dev *card, struct sk_buff *skb)
2512 struct ns_skb_cb *cb = NS_SKB_CB(skb);
2514 if (unlikely(cb->buf_type == BUF_NONE)) {
2515 printk("nicstar%d: What kind of rx buffer is this?\n", card->index);
2516 dev_kfree_skb_any(skb);
2518 push_rxbufs(card, skb);
2522 static void recycle_iovec_rx_bufs(ns_dev *card, struct iovec *iov, int count)
2525 recycle_rx_buf(card, (struct sk_buff *) (iov++)->iov_base);
2529 static void recycle_iov_buf(ns_dev *card, struct sk_buff *iovb)
2531 if (card->iovpool.count < card->iovnr.max)
2533 skb_queue_tail(&card->iovpool.queue, iovb);
2534 card->iovpool.count++;
2537 dev_kfree_skb_any(iovb);
2542 static void dequeue_sm_buf(ns_dev *card, struct sk_buff *sb)
2544 skb_unlink(sb, &card->sbpool.queue);
2545 #ifdef NS_USE_DESTRUCTORS
2546 if (card->sbfqc < card->sbnr.min)
2548 if (card->sbfqc < card->sbnr.init)
2550 struct sk_buff *new_sb;
2551 if ((new_sb = dev_alloc_skb(NS_SMSKBSIZE)) != NULL)
2553 NS_SKB_CB(new_sb)->buf_type = BUF_SM;
2554 skb_queue_tail(&card->sbpool.queue, new_sb);
2555 skb_reserve(new_sb, NS_AAL0_HEADER);
2556 push_rxbufs(card, new_sb);
2559 if (card->sbfqc < card->sbnr.init)
2560 #endif /* NS_USE_DESTRUCTORS */
2562 struct sk_buff *new_sb;
2563 if ((new_sb = dev_alloc_skb(NS_SMSKBSIZE)) != NULL)
2565 NS_SKB_CB(new_sb)->buf_type = BUF_SM;
2566 skb_queue_tail(&card->sbpool.queue, new_sb);
2567 skb_reserve(new_sb, NS_AAL0_HEADER);
2568 push_rxbufs(card, new_sb);
2575 static void dequeue_lg_buf(ns_dev *card, struct sk_buff *lb)
2577 skb_unlink(lb, &card->lbpool.queue);
2578 #ifdef NS_USE_DESTRUCTORS
2579 if (card->lbfqc < card->lbnr.min)
2581 if (card->lbfqc < card->lbnr.init)
2583 struct sk_buff *new_lb;
2584 if ((new_lb = dev_alloc_skb(NS_LGSKBSIZE)) != NULL)
2586 NS_SKB_CB(new_lb)->buf_type = BUF_LG;
2587 skb_queue_tail(&card->lbpool.queue, new_lb);
2588 skb_reserve(new_lb, NS_SMBUFSIZE);
2589 push_rxbufs(card, new_lb);
2592 if (card->lbfqc < card->lbnr.init)
2593 #endif /* NS_USE_DESTRUCTORS */
2595 struct sk_buff *new_lb;
2596 if ((new_lb = dev_alloc_skb(NS_LGSKBSIZE)) != NULL)
2598 NS_SKB_CB(new_lb)->buf_type = BUF_LG;
2599 skb_queue_tail(&card->lbpool.queue, new_lb);
2600 skb_reserve(new_lb, NS_SMBUFSIZE);
2601 push_rxbufs(card, new_lb);
2608 static int ns_proc_read(struct atm_dev *dev, loff_t *pos, char *page)
2615 card = (ns_dev *) dev->dev_data;
2616 stat = readl(card->membase + STAT);
2618 return sprintf(page, "Pool count min init max \n");
2620 return sprintf(page, "Small %5d %5d %5d %5d \n",
2621 ns_stat_sfbqc_get(stat), card->sbnr.min, card->sbnr.init,
2624 return sprintf(page, "Large %5d %5d %5d %5d \n",
2625 ns_stat_lfbqc_get(stat), card->lbnr.min, card->lbnr.init,
2628 return sprintf(page, "Huge %5d %5d %5d %5d \n", card->hbpool.count,
2629 card->hbnr.min, card->hbnr.init, card->hbnr.max);
2631 return sprintf(page, "Iovec %5d %5d %5d %5d \n", card->iovpool.count,
2632 card->iovnr.min, card->iovnr.init, card->iovnr.max);
2636 retval = sprintf(page, "Interrupt counter: %u \n", card->intcnt);
2641 /* Dump 25.6 Mbps PHY registers */
2642 /* Now there's a 25.6 Mbps PHY driver this code isn't needed. I left it
2643 here just in case it's needed for debugging. */
2644 if (card->max_pcr == ATM_25_PCR && !left--)
2649 for (i = 0; i < 4; i++)
2651 while (CMD_BUSY(card));
2652 writel(NS_CMD_READ_UTILITY | 0x00000200 | i, card->membase + CMD);
2653 while (CMD_BUSY(card));
2654 phy_regs[i] = readl(card->membase + DR0) & 0x000000FF;
2657 return sprintf(page, "PHY regs: 0x%02X 0x%02X 0x%02X 0x%02X \n",
2658 phy_regs[0], phy_regs[1], phy_regs[2], phy_regs[3]);
2660 #endif /* 0 - Dump 25.6 Mbps PHY registers */
2663 if (left-- < NS_TST_NUM_ENTRIES)
2665 if (card->tste2vc[left + 1] == NULL)
2666 return sprintf(page, "%5d - VBR/UBR \n", left + 1);
2668 return sprintf(page, "%5d - %d %d \n", left + 1,
2669 card->tste2vc[left + 1]->tx_vcc->vpi,
2670 card->tste2vc[left + 1]->tx_vcc->vci);
2678 static int ns_ioctl(struct atm_dev *dev, unsigned int cmd, void __user *arg)
2683 unsigned long flags;
2685 card = dev->dev_data;
2689 if (get_user(pl.buftype, &((pool_levels __user *) arg)->buftype))
2693 case NS_BUFTYPE_SMALL:
2694 pl.count = ns_stat_sfbqc_get(readl(card->membase + STAT));
2695 pl.level.min = card->sbnr.min;
2696 pl.level.init = card->sbnr.init;
2697 pl.level.max = card->sbnr.max;
2700 case NS_BUFTYPE_LARGE:
2701 pl.count = ns_stat_lfbqc_get(readl(card->membase + STAT));
2702 pl.level.min = card->lbnr.min;
2703 pl.level.init = card->lbnr.init;
2704 pl.level.max = card->lbnr.max;
2707 case NS_BUFTYPE_HUGE:
2708 pl.count = card->hbpool.count;
2709 pl.level.min = card->hbnr.min;
2710 pl.level.init = card->hbnr.init;
2711 pl.level.max = card->hbnr.max;
2714 case NS_BUFTYPE_IOVEC:
2715 pl.count = card->iovpool.count;
2716 pl.level.min = card->iovnr.min;
2717 pl.level.init = card->iovnr.init;
2718 pl.level.max = card->iovnr.max;
2722 return -ENOIOCTLCMD;
2725 if (!copy_to_user((pool_levels __user *) arg, &pl, sizeof(pl)))
2726 return (sizeof(pl));
2731 if (!capable(CAP_NET_ADMIN))
2733 if (copy_from_user(&pl, (pool_levels __user *) arg, sizeof(pl)))
2735 if (pl.level.min >= pl.level.init || pl.level.init >= pl.level.max)
2737 if (pl.level.min == 0)
2741 case NS_BUFTYPE_SMALL:
2742 if (pl.level.max > TOP_SB)
2744 card->sbnr.min = pl.level.min;
2745 card->sbnr.init = pl.level.init;
2746 card->sbnr.max = pl.level.max;
2749 case NS_BUFTYPE_LARGE:
2750 if (pl.level.max > TOP_LB)
2752 card->lbnr.min = pl.level.min;
2753 card->lbnr.init = pl.level.init;
2754 card->lbnr.max = pl.level.max;
2757 case NS_BUFTYPE_HUGE:
2758 if (pl.level.max > TOP_HB)
2760 card->hbnr.min = pl.level.min;
2761 card->hbnr.init = pl.level.init;
2762 card->hbnr.max = pl.level.max;
2765 case NS_BUFTYPE_IOVEC:
2766 if (pl.level.max > TOP_IOVB)
2768 card->iovnr.min = pl.level.min;
2769 card->iovnr.init = pl.level.init;
2770 card->iovnr.max = pl.level.max;
2780 if (!capable(CAP_NET_ADMIN))
2782 btype = (long) arg; /* a long is the same size as a pointer or bigger */
2785 case NS_BUFTYPE_SMALL:
2786 while (card->sbfqc < card->sbnr.init)
2790 sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
2793 NS_SKB_CB(sb)->buf_type = BUF_SM;
2794 skb_queue_tail(&card->sbpool.queue, sb);
2795 skb_reserve(sb, NS_AAL0_HEADER);
2796 push_rxbufs(card, sb);
2800 case NS_BUFTYPE_LARGE:
2801 while (card->lbfqc < card->lbnr.init)
2805 lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
2808 NS_SKB_CB(lb)->buf_type = BUF_LG;
2809 skb_queue_tail(&card->lbpool.queue, lb);
2810 skb_reserve(lb, NS_SMBUFSIZE);
2811 push_rxbufs(card, lb);
2815 case NS_BUFTYPE_HUGE:
2816 while (card->hbpool.count > card->hbnr.init)
2820 spin_lock_irqsave(&card->int_lock, flags);
2821 hb = skb_dequeue(&card->hbpool.queue);
2822 card->hbpool.count--;
2823 spin_unlock_irqrestore(&card->int_lock, flags);
2825 printk("nicstar%d: huge buffer count inconsistent.\n",
2828 dev_kfree_skb_any(hb);
2831 while (card->hbpool.count < card->hbnr.init)
2835 hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
2838 NS_SKB_CB(hb)->buf_type = BUF_NONE;
2839 spin_lock_irqsave(&card->int_lock, flags);
2840 skb_queue_tail(&card->hbpool.queue, hb);
2841 card->hbpool.count++;
2842 spin_unlock_irqrestore(&card->int_lock, flags);
2846 case NS_BUFTYPE_IOVEC:
2847 while (card->iovpool.count > card->iovnr.init)
2849 struct sk_buff *iovb;
2851 spin_lock_irqsave(&card->int_lock, flags);
2852 iovb = skb_dequeue(&card->iovpool.queue);
2853 card->iovpool.count--;
2854 spin_unlock_irqrestore(&card->int_lock, flags);
2856 printk("nicstar%d: iovec buffer count inconsistent.\n",
2859 dev_kfree_skb_any(iovb);
2862 while (card->iovpool.count < card->iovnr.init)
2864 struct sk_buff *iovb;
2866 iovb = alloc_skb(NS_IOVBUFSIZE, GFP_KERNEL);
2869 NS_SKB_CB(iovb)->buf_type = BUF_NONE;
2870 spin_lock_irqsave(&card->int_lock, flags);
2871 skb_queue_tail(&card->iovpool.queue, iovb);
2872 card->iovpool.count++;
2873 spin_unlock_irqrestore(&card->int_lock, flags);
2884 if (dev->phy && dev->phy->ioctl) {
2885 return dev->phy->ioctl(dev, cmd, arg);
2888 printk("nicstar%d: %s == NULL \n", card->index,
2889 dev->phy ? "dev->phy->ioctl" : "dev->phy");
2890 return -ENOIOCTLCMD;
2896 static void which_list(ns_dev *card, struct sk_buff *skb)
2898 printk("skb buf_type: 0x%08x\n", NS_SKB_CB(skb)->buf_type);
2902 static void ns_poll(unsigned long arg)
2906 unsigned long flags;
2909 PRINTK("nicstar: Entering ns_poll().\n");
2910 for (i = 0; i < num_cards; i++)
2913 if (spin_is_locked(&card->int_lock)) {
2914 /* Probably it isn't worth spinning */
2917 spin_lock_irqsave(&card->int_lock, flags);
2920 stat_r = readl(card->membase + STAT);
2921 if (stat_r & NS_STAT_TSIF)
2922 stat_w |= NS_STAT_TSIF;
2923 if (stat_r & NS_STAT_EOPDU)
2924 stat_w |= NS_STAT_EOPDU;
2929 writel(stat_w, card->membase + STAT);
2930 spin_unlock_irqrestore(&card->int_lock, flags);
2932 mod_timer(&ns_timer, jiffies + NS_POLL_PERIOD);
2933 PRINTK("nicstar: Leaving ns_poll().\n");
2938 static int ns_parse_mac(char *mac, unsigned char *esi)
2943 if (mac == NULL || esi == NULL)
2946 for (i = 0; i < 6; i++)
2948 if ((byte1 = ns_h2i(mac[j++])) < 0)
2950 if ((byte0 = ns_h2i(mac[j++])) < 0)
2952 esi[i] = (unsigned char) (byte1 * 16 + byte0);
2955 if (mac[j++] != ':')
2964 static short ns_h2i(char c)
2966 if (c >= '0' && c <= '9')
2967 return (short) (c - '0');
2968 if (c >= 'A' && c <= 'F')
2969 return (short) (c - 'A' + 10);
2970 if (c >= 'a' && c <= 'f')
2971 return (short) (c - 'a' + 10);
2977 static void ns_phy_put(struct atm_dev *dev, unsigned char value,
2981 unsigned long flags;
2983 card = dev->dev_data;
2984 spin_lock_irqsave(&card->res_lock, flags);
2985 while(CMD_BUSY(card));
2986 writel((unsigned long) value, card->membase + DR0);
2987 writel(NS_CMD_WRITE_UTILITY | 0x00000200 | (addr & 0x000000FF),
2988 card->membase + CMD);
2989 spin_unlock_irqrestore(&card->res_lock, flags);
2994 static unsigned char ns_phy_get(struct atm_dev *dev, unsigned long addr)
2997 unsigned long flags;
3000 card = dev->dev_data;
3001 spin_lock_irqsave(&card->res_lock, flags);
3002 while(CMD_BUSY(card));
3003 writel(NS_CMD_READ_UTILITY | 0x00000200 | (addr & 0x000000FF),
3004 card->membase + CMD);
3005 while(CMD_BUSY(card));
3006 data = readl(card->membase + DR0) & 0x000000FF;
3007 spin_unlock_irqrestore(&card->res_lock, flags);
3008 return (unsigned char) data;
3013 module_init(nicstar_init);
3014 module_exit(nicstar_cleanup);