patch-2.3.18 linux/drivers/atm/nicstar.c.old_skb
Next file: linux/drivers/atm/suni.c
Previous file: linux/drivers/atm/nicstar.c
Back to the patch index
Back to the overall index
- Lines: 2884
- Date:
Wed Dec 31 16:00:00 1969
- Orig file:
v2.3.17/linux/drivers/atm/nicstar.c.old_skb
- Orig date:
Thu Aug 26 13:05:34 1999
diff -u --recursive --new-file v2.3.17/linux/drivers/atm/nicstar.c.old_skb linux/drivers/atm/nicstar.c.old_skb
@@ -1,2883 +0,0 @@
-/******************************************************************************
- *
- * nicstar.c
- *
- * Device driver supporting CBR for NICStAR based cards.
- *
- * IMPORTANT: The included file nicstarmac.c was NOT WRITTEN BY ME.
- * It was taken from the frle-0.22 device driver.
- * As the file doesn't have a copyright notice, in the file
- * nicstarmac.copyright I put the copyright notice from the
- * frle-0.22 device driver.
- * Some code is based on the nicstar driver by M. Welsh.
- *
- * Author: Rui Prior
- *
- * (C) INESC 1998
- *
- ******************************************************************************/
-
-
-/* Header files ***************************************************************/
-
-#include <linux/module.h>
-#include <linux/config.h>
-#include <linux/kernel.h>
-#include <linux/skbuff.h>
-#include <linux/atmdev.h>
-#include <linux/atm.h>
-#include <linux/pci.h>
-#include <linux/types.h>
-#include <linux/string.h>
-#include <linux/delay.h>
-#include <linux/init.h>
-#include <linux/sched.h>
-#include <linux/timer.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include "nicstar.h"
-#include "nicstarmac.h"
-
-
-/* Additional code ************************************************************/
-
-#include "nicstarmac.c"
-
-
-/* Configurable parameters ****************************************************/
-
-#undef PHY_LOOPBACK
-#undef TX_DEBUG
-#undef RX_DEBUG
-#undef GENERAL_DEBUG
-#undef EXTRA_DEBUG
-
-#undef NS_USE_DESTRUCTORS /* For now keep this undefined unless you know
- you're going to use only raw ATM */
-
-
-/* Do not touch these *********************************************************/
-
-#ifdef TX_DEBUG
-#define TXPRINTK(args...) printk(args)
-#else
-#define TXPRINTK(args...)
-#endif /* TX_DEBUG */
-
-#ifdef RX_DEBUG
-#define RXPRINTK(args...) printk(args)
-#else
-#define RXPRINTK(args...)
-#endif /* RX_DEBUG */
-
-#ifdef GENERAL_DEBUG
-#define PRINTK(args...) printk(args)
-#else
-#define PRINTK(args...)
-#endif /* GENERAL_DEBUG */
-
-#ifdef EXTRA_DEBUG
-#define XPRINTK(args...) printk(args)
-#else
-#define XPRINTK(args...)
-#endif /* EXTRA_DEBUG */
-
-
-/* Macros *********************************************************************/
-
-#define MAX(a,b) ((a) > (b) ? (a) : (b))
-#define MIN(a,b) ((a) < (b) ? (a) : (b))
-
-#define CMD_BUSY(card) (readl((card)->membase + STAT) & NS_STAT_CMDBZ)
-
-#define NS_DELAY mdelay(1)
-
-#define ALIGN_ADDRESS(addr, alignment) \
- ((((u32) (addr)) + (((u32) (alignment)) - 1)) & ~(((u32) (alignment)) - 1))
-
-#undef CEIL(d)
-
-
-/* Version definition *********************************************************/
-/*
-#include <linux/version.h>
-char kernel_version[] = UTS_RELEASE;
-*/
-
-/* Function declarations ******************************************************/
-
-static u32 ns_read_sram(ns_dev *card, u32 sram_address);
-static void ns_write_sram(ns_dev *card, u32 sram_address, u32 *value, int count);
-static int ns_init_card(int i, struct pci_dev *pcidev);
-static void ns_init_card_error(ns_dev *card, int error);
-static scq_info *get_scq(int size, u32 scd);
-static void free_scq(scq_info *scq, struct atm_vcc *vcc);
-static void push_rxbufs(ns_dev *card, u32 type, u32 handle1, u32 addr1,
- u32 handle2, u32 addr2);
-static void ns_irq_handler(int irq, void *dev_id, struct pt_regs *regs);
-static int ns_open(struct atm_vcc *vcc, short vpi, int vci);
-static void ns_close(struct atm_vcc *vcc);
-static void fill_tst(ns_dev *card, int n, vc_map *vc);
-static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb);
-static int push_scqe(ns_dev *card, vc_map *vc, scq_info *scq, ns_scqe *tbd,
- struct sk_buff *skb);
-static void process_tsq(ns_dev *card);
-static void drain_scq(ns_dev *card, scq_info *scq, int pos);
-static void process_rsq(ns_dev *card);
-static void dequeue_rx(ns_dev *card, ns_rsqe *rsqe);
-#ifdef NS_USE_DESTRUCTORS
-static void ns_sb_destructor(struct sk_buff *sb);
-static void ns_lb_destructor(struct sk_buff *lb);
-static void ns_hb_destructor(struct sk_buff *hb);
-#endif /* NS_USE_DESTRUCTORS */
-static void recycle_rx_buf(ns_dev *card, struct sk_buff *skb);
-static void recycle_iovec_rx_bufs(ns_dev *card, struct iovec *iov, int count);
-static void recycle_iov_buf(ns_dev *card, struct sk_buff *iovb);
-static void dequeue_sm_buf(ns_dev *card, struct sk_buff *sb);
-static void dequeue_lg_buf(ns_dev *card, struct sk_buff *lb);
-static int ns_proc_read(struct atm_dev *dev, loff_t *pos, char *page);
-static int ns_ioctl(struct atm_dev *dev, unsigned int cmd, void *arg);
-static void which_list(ns_dev *card, struct sk_buff *skb);
-static void ns_poll(unsigned long arg);
-
-
-/* Global variables ***********************************************************/
-
-static struct ns_dev *cards[NS_MAX_CARDS];
-static unsigned num_cards = 0;
-static struct atmdev_ops atm_ops =
-{
- NULL, /* dev_close */
- ns_open, /* open */
- ns_close, /* close */
- ns_ioctl, /* ioctl */
- NULL, /* getsockopt */
- NULL, /* setsockopt */
- ns_send, /* send */
- NULL, /* sg_send */
- NULL, /* send_oam */
- NULL, /* phy_put */
- NULL, /* phy_get */
- NULL, /* feedback */
- NULL, /* change_qos */
- NULL, /* free_rx_skb */
- ns_proc_read /* proc_read */
-};
-static struct timer_list ns_timer;
-
-
-/* Functions*******************************************************************/
-
-#ifdef MODULE
-
-int init_module(void)
-{
- int i;
- unsigned error = 0; /* Initialized to remove compile warning */
- struct pci_dev *pcidev;
-
- XPRINTK("nicstar: init_module() called.\n");
- if(!pci_present())
- {
- printk("nicstar: no PCI subsystem found.\n");
- return -EIO;
- }
-
- for(i = 0; i < NS_MAX_CARDS; i++)
- cards[i] = NULL;
-
- pcidev = NULL;
- for(i = 0; i < NS_MAX_CARDS; i++)
- {
- if ((pcidev = pci_find_device(PCI_VENDOR_ID_IDT,
- PCI_DEVICE_ID_IDT_IDT77201,
- pcidev)) == NULL)
- break;
-
- error = ns_init_card(i, pcidev);
- if (error)
- i--; /* Try to find another card but don't increment index */
- }
-
- if (i == 0)
- {
- if (!error)
- {
- printk("nicstar: no cards found.\n");
- return -ENXIO;
- }
- else
- return -EIO;
- }
- TXPRINTK("nicstar: TX debug enabled.\n");
- RXPRINTK("nicstar: RX debug enabled.\n");
- PRINTK("nicstar: General debug enabled.\n");
-#ifdef PHY_LOOPBACK
- printk("nicstar: using PHY loopback.\n");
-#endif /* PHY_LOOPBACK */
- XPRINTK("nicstar: init_module() returned.\n");
-
- ns_timer.next = NULL;
- ns_timer.prev = NULL;
- ns_timer.expires = jiffies + NS_POLL_PERIOD;
- ns_timer.data = 0UL;
- ns_timer.function = ns_poll;
- add_timer(&ns_timer);
- return 0;
-}
-
-
-
-void cleanup_module(void)
-{
- int i, j;
- unsigned short pci_command;
- ns_dev *card;
- struct sk_buff *hb;
- struct sk_buff *iovb;
- struct sk_buff *lb;
- struct sk_buff *sb;
-
- XPRINTK("nicstar: cleanup_module() called.\n");
-
- if (MOD_IN_USE)
- printk("nicstar: module in use, remove delayed.\n");
-
- del_timer(&ns_timer);
-
- for (i = 0; i < NS_MAX_CARDS; i++)
- {
- if (cards[i] == NULL)
- continue;
-
- card = cards[i];
-
- /* Stop everything */
- writel(0x00000000, card->membase + CFG);
-
- /* De-register device */
- atm_dev_deregister(card->atmdev);
-
- /* Disable memory mapping and busmastering */
- if (pci_read_config_word(card->pcidev, PCI_COMMAND, &pci_command) != 0)
- {
- printk("nicstar%d: can't read PCI_COMMAND.\n", i);
- }
- pci_command &= ~(PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
- if (pci_write_config_word(card->pcidev, PCI_COMMAND, pci_command) != 0)
- {
- printk("nicstar%d: can't write PCI_COMMAND.\n", i);
- }
-
- /* Free up resources */
- j = 0;
- PRINTK("nicstar%d: freeing %d huge buffers.\n", i, card->hbpool.count);
- while ((hb = skb_dequeue(&card->hbpool.queue)) != NULL)
- {
- kfree_skb(hb);
- j++;
- }
- PRINTK("nicstar%d: %d huge buffers freed.\n", i, j);
- j = 0;
- PRINTK("nicstar%d: freeing %d iovec buffers.\n", i, card->iovpool.count);
- while ((iovb = skb_dequeue(&card->iovpool.queue)) != NULL)
- {
- kfree_skb(iovb);
- j++;
- }
- PRINTK("nicstar%d: %d iovec buffers freed.\n", i, j);
- while ((lb = skb_dequeue(&card->lbpool.queue)) != NULL)
- kfree_skb(lb);
- while ((sb = skb_dequeue(&card->sbpool.queue)) != NULL)
- kfree_skb(sb);
- free_scq(card->scq0, NULL);
- for (j = 0; j < NS_FRSCD_NUM; j++)
- {
- if (card->scd2vc[j] != NULL)
- free_scq(card->scd2vc[j]->scq, card->scd2vc[j]->tx_vcc);
- }
- kfree(card->rsq.org);
- kfree(card->tsq.org);
- free_irq(card->pcidev->irq, card);
- iounmap((void *) card->membase);
- kfree(card);
-
- }
- XPRINTK("nicstar: cleanup_module() returned.\n");
-}
-
-
-#else
-
-__initfunc(int nicstar_detect(void))
-{
- int i;
- unsigned error = 0; /* Initialized to remove compile warning */
- struct pci_dev *pcidev;
-
- if(!pci_present())
- {
- printk("nicstar: no PCI subsystem found.\n");
- return -EIO;
- }
-
- for(i = 0; i < NS_MAX_CARDS; i++)
- cards[i] = NULL;
-
- pcidev = NULL;
- for(i = 0; i < NS_MAX_CARDS; i++)
- {
- if ((pcidev = pci_find_device(PCI_VENDOR_ID_IDT,
- PCI_DEVICE_ID_IDT_IDT77201,
- pcidev)) == NULL)
- break;
-
- error = ns_init_card(i, pcidev);
- if (error)
- i--; /* Try to find another card but don't increment index */
- }
-
- if (i == 0 && error)
- return -EIO;
-
- TXPRINTK("nicstar: TX debug enabled.\n");
- RXPRINTK("nicstar: RX debug enabled.\n");
- PRINTK("nicstar: General debug enabled.\n");
-#ifdef PHY_LOOPBACK
- printk("nicstar: using PHY loopback.\n");
-#endif /* PHY_LOOPBACK */
- XPRINTK("nicstar: init_module() returned.\n");
-
- return i;
-}
-
-
-#endif /* MODULE */
-
-
-static u32 ns_read_sram(ns_dev *card, u32 sram_address)
-{
- unsigned long flags;
- u32 data;
- sram_address <<= 2;
- sram_address &= 0x0007FFFC; /* address must be dword aligned */
- sram_address |= 0x50000000; /* SRAM read command */
- save_flags(flags); cli();
- while (CMD_BUSY(card));
- writel(sram_address, card->membase + CMD);
- while (CMD_BUSY(card));
- data = readl(card->membase + DR0);
- restore_flags(flags);
- return data;
-}
-
-
-
-static void ns_write_sram(ns_dev *card, u32 sram_address, u32 *value, int count)
-{
- unsigned long flags;
- int i, c;
- count--; /* count range now is 0..3 instead of 1..4 */
- c = count;
- c <<= 2; /* to use increments of 4 */
- save_flags(flags); cli();
- while (CMD_BUSY(card));
- for (i = 0; i <= c; i += 4)
- writel(*(value++), card->membase + i);
- /* Note: DR# registers are the first 4 dwords in nicstar's memspace,
- so card->membase + DR0 == card->membase */
- sram_address <<= 2;
- sram_address &= 0x0007FFFC;
- sram_address |= (0x40000000 | count);
- writel(sram_address, card->membase + CMD);
- restore_flags(flags);
-}
-
-
-static int ns_init_card(int i, struct pci_dev *pcidev)
-{
- int j;
- struct ns_dev *card;
- unsigned short pci_command;
- unsigned char pci_latency;
- unsigned error;
- u32 data;
- u32 u32d[4];
- u32 ns_cfg_rctsize;
- int bcount;
-
- error = 0;
-
- if ((card = kmalloc(sizeof(ns_dev), GFP_KERNEL)) == NULL)
- {
- printk("nicstar%d: can't allocate memory for device structure.\n", i);
- error = 2;
- ns_init_card_error(card, error);
- return error;
- }
- cards[i] = card;
-
- card->index = i;
- card->pcidev = pcidev;
- card->membase = (u32) (pcidev->base_address[1] & PCI_BASE_ADDRESS_MEM_MASK);
- card->membase = (u32) ioremap(card->membase, NS_IOREMAP_SIZE);
- if (card->membase == (u32) (NULL))
- {
- printk("nicstar%d: can't ioremap() membase.\n",i);
- error = 3;
- ns_init_card_error(card, error);
- return error;
- }
- PRINTK("nicstar%d: membase at 0x%x.\n", i, card->membase);
-
- if (pci_read_config_word(pcidev, PCI_COMMAND, &pci_command) != 0)
- {
- printk("nicstar%d: can't read PCI_COMMAND.\n", i);
- error = 4;
- ns_init_card_error(card, error);
- return error;
- }
- pci_command |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
- if (pci_write_config_word(pcidev, PCI_COMMAND, pci_command) != 0)
- {
- printk("nicstar%d: can't write PCI_COMMAND.\n", i);
- error = 5;
- ns_init_card_error(card, error);
- return error;
- }
-
- if (pci_read_config_byte(pcidev, PCI_LATENCY_TIMER, &pci_latency) != 0)
- {
- printk("nicstar%d: can't read PCI latency timer.\n", i);
- error = 6;
- ns_init_card_error(card, error);
- return error;
- }
- if (pci_latency < NS_PCI_LATENCY)
- {
- PRINTK("nicstar%d: setting PCI latency timer to %d.\n", i, NS_PCI_LATENCY);
- for (j = 1; j < 4; j++)
- {
- if (pci_write_config_byte(pcidev, PCI_LATENCY_TIMER, NS_PCI_LATENCY) != 0);
- break;
- }
- if (j == 10)
- {
- printk("nicstar%d: can't set PCI latency timer to %d.\n", i, NS_PCI_LATENCY);
- error = 7;
- ns_init_card_error(card, error);
- return error;
- }
- }
-
- /* Clear timer overflow */
- data = readl(card->membase + STAT);
- if (data & NS_STAT_TMROF)
- writel(NS_STAT_TMROF, card->membase + STAT);
-
- /* Software reset */
- writel(NS_CFG_SWRST, card->membase + CFG);
- NS_DELAY;
- writel(0x00000000, card->membase + CFG);
-
- /* PHY reset */
- writel(0x00000008, card->membase + GP);
- NS_DELAY;
- writel(0x00000001, card->membase + GP);
- NS_DELAY;
- while (CMD_BUSY(card));
- writel(NS_CMD_WRITE_UTILITY | 0x00000100, card->membase + CMD); /* Sync UTOPIA with SAR clock */
- NS_DELAY;
-
- /* Detect PHY type */
- while (CMD_BUSY(card));
- writel(NS_CMD_READ_UTILITY | 0x00000200, card->membase + CMD);
- while (CMD_BUSY(card));
- data = readl(card->membase + DR0);
- if (data == 0x00000009)
- {
- printk("nicstar%d: PHY seems to be 25 Mbps.\n", i);
- card->max_pcr = IDT_25_PCR;
- while(CMD_BUSY(card));
- writel(0x00000008, card->membase + DR0);
- writel(NS_CMD_WRITE_UTILITY | 0x00000200, card->membase + CMD);
- /* Clear an eventual pending interrupt */
- writel(NS_STAT_SFBQF, card->membase + STAT);
-#ifdef PHY_LOOPBACK
- while(CMD_BUSY(card));
- writel(0x00000022, card->membase + DR0);
- writel(NS_CMD_WRITE_UTILITY | 0x00000202, card->membase + CMD);
-#endif /* PHY_LOOPBACK */
- }
- else if (data == 0x00000030)
- {
- printk("nicstar%d: PHY seems to be 155 Mbps.\n", i);
- card->max_pcr = ATM_OC3_PCR;
-#ifdef PHY_LOOPBACK
- while(CMD_BUSY(card));
- writel(0x00000002, card->membase + DR0);
- writel(NS_CMD_WRITE_UTILITY | 0x00000205, card->membase + CMD);
-#endif /* PHY_LOOPBACK */
- }
- else
- {
- printk("nicstar%d: can't determine PHY type.\n", i);
- error = 8;
- ns_init_card_error(card, error);
- return error;
- }
- writel(0x00000000, card->membase + GP);
-
- /* Determine SRAM size */
- data = 0x76543210;
- ns_write_sram(card, 0x1C003, &data, 1);
- data = 0x89ABCDEF;
- ns_write_sram(card, 0x14003, &data, 1);
- if (ns_read_sram(card, 0x14003) == 0x89ABCDEF &&
- ns_read_sram(card, 0x1C003) == 0x76543210)
- card->sram_size = 128;
- else
- card->sram_size = 32;
- PRINTK("nicstar%d: %dK x 32bit SRAM size.\n", i, card->sram_size);
-
- card->rct_size = NS_MAX_RCTSIZE;
-
-#if (NS_MAX_RCTSIZE == 4096)
- if (card->sram_size == 128)
- printk("nicstar%d: limiting maximum VCI. See NS_MAX_RCTSIZE in nicstar.h\n", i);
-#elif (NS_MAX_RCTSIZE == 16384)
- if (card->sram_size == 32)
- {
- printk("nicstar%d: wasting memory. See NS_MAX_RCTSIZE in nicstar.h\n", i);
- card->rct_size = 4096;
- }
-#else
-#error NS_MAX_RCTSIZE must be either 4096 or 16384 in nicstar.c
-#endif
-
- card->vpibits = NS_VPIBITS;
- if (card->rct_size == 4096)
- card->vcibits = 12 - NS_VPIBITS;
- else /* card->rct_size == 16384 */
- card->vcibits = 14 - NS_VPIBITS;
-
-#ifdef ESI_FROM_EPROM
- /* Initialize the nicstar eeprom/eprom stuff, for the MAC addr */
- nicstar_init_eprom(card->membase);
-#endif /* ESI_FROM_EPROM */
-
- if (request_irq(pcidev->irq, &ns_irq_handler, SA_INTERRUPT, "nicstar", card) != 0)
- {
- printk("nicstar%d: can't allocate IRQ.\n", i);
- error = 9;
- ns_init_card_error(card, error);
- return error;
- }
-
- /* Set the VPI/VCI MSb mask to zero so we can receive OAM cells */
- writel(0x00000000, card->membase + VPM);
-
- /* Initialize TSQ */
- card->tsq.org = kmalloc(NS_TSQSIZE + NS_TSQ_ALIGNMENT, GFP_KERNEL);
- if (card->tsq.org == NULL)
- {
- printk("nicstar%d: can't allocate TSQ.\n", i);
- error = 10;
- ns_init_card_error(card, error);
- return error;
- }
- card->tsq.base = (ns_tsi *) ALIGN_ADDRESS(card->tsq.org, NS_TSQ_ALIGNMENT);
- card->tsq.next = card->tsq.base;
- card->tsq.last = card->tsq.base + (NS_TSQ_NUM_ENTRIES - 1);
- for (j = 0; j < NS_TSQ_NUM_ENTRIES; j++)
- ns_tsi_init(card->tsq.base + j);
- writel(0x00000000, card->membase + TSQH);
- writel((u32) virt_to_bus(card->tsq.base), card->membase + TSQB);
- PRINTK("nicstar%d: TSQ base at 0x%x 0x%x 0x%x.\n", i, (u32) card->tsq.base,
- (u32) virt_to_bus(card->tsq.base), readl(card->membase + TSQB));
-
- /* Initialize RSQ */
- card->rsq.org = kmalloc(NS_RSQSIZE + NS_RSQ_ALIGNMENT, GFP_KERNEL);
- if (card->rsq.org == NULL)
- {
- printk("nicstar%d: can't allocate RSQ.\n", i);
- error = 11;
- ns_init_card_error(card, error);
- return error;
- }
- card->rsq.base = (ns_rsqe *) ALIGN_ADDRESS(card->rsq.org, NS_RSQ_ALIGNMENT);
- card->rsq.next = card->rsq.base;
- card->rsq.last = card->rsq.base + (NS_RSQ_NUM_ENTRIES - 1);
- for (j = 0; j < NS_RSQ_NUM_ENTRIES; j++)
- ns_rsqe_init(card->rsq.base + j);
- writel(0x00000000, card->membase + RSQH);
- writel((u32) virt_to_bus(card->rsq.base), card->membase + RSQB);
- PRINTK("nicstar%d: RSQ base at 0x%x.\n", i, (u32) card->rsq.base);
-
- /* Initialize SCQ0, the only VBR SCQ used */
- card->scq1 = (scq_info *) NULL;
- card->scq2 = (scq_info *) NULL;
- card->scq0 = get_scq(VBR_SCQSIZE, NS_VRSCD0);
- if (card->scq0 == (scq_info *) NULL)
- {
- printk("nicstar%d: can't get SCQ0.\n", i);
- error = 12;
- ns_init_card_error(card, error);
- return error;
- }
- u32d[0] = (u32) virt_to_bus(card->scq0->base);
- u32d[1] = (u32) 0x00000000;
- u32d[2] = (u32) 0xffffffff;
- u32d[3] = (u32) 0x00000000;
- ns_write_sram(card, NS_VRSCD0, u32d, 4);
- ns_write_sram(card, NS_VRSCD1, u32d, 4); /* These last two won't be used */
- ns_write_sram(card, NS_VRSCD2, u32d, 4); /* but are initialized, just in case... */
- card->scq0->scd = NS_VRSCD0;
- PRINTK("nicstar%d: VBR-SCQ0 base at 0x%x.\n", i, (u32) card->scq0->base);
-
- /* Initialize TSTs */
- card->tst_addr = NS_TST0;
- card->tst_free_entries = NS_TST_NUM_ENTRIES;
- data = NS_TST_OPCODE_VARIABLE;
- for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
- ns_write_sram(card, NS_TST0 + j, &data, 1);
- data = ns_tste_make(NS_TST_OPCODE_END, NS_TST0);
- ns_write_sram(card, NS_TST0 + NS_TST_NUM_ENTRIES, &data, 1);
- for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
- ns_write_sram(card, NS_TST1 + j, &data, 1);
- data = ns_tste_make(NS_TST_OPCODE_END, NS_TST1);
- ns_write_sram(card, NS_TST1 + NS_TST_NUM_ENTRIES, &data, 1);
- for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
- card->tste2vc[j] = NULL;
- writel(NS_TST0 << 2, card->membase + TSTB);
-
-
- /* Initialize RCT. AAL type is set on opening the VC. */
-#ifdef RCQ_SUPPORT
- u32d[0] = NS_RCTE_RAWCELLINTEN;
-#else
- u32d[0] = 0x00000000;
-#endif RCQ_SUPPORT
- u32d[1] = 0x00000000;
- u32d[2] = 0x00000000;
- u32d[3] = 0xFFFFFFFF;
- for (j = 0; j < card->rct_size; j++)
- ns_write_sram(card, j * 4, u32d, 4);
-
- memset(card->vcmap, 0, NS_MAX_RCTSIZE * sizeof(vc_map));
-
- for (j = 0; j < NS_FRSCD_NUM; j++)
- card->scd2vc[j] = NULL;
-
- /* Initialize buffer levels */
- card->sbnr.min = MIN_SB;
- card->sbnr.init = NUM_SB;
- card->sbnr.max = MAX_SB;
- card->lbnr.min = MIN_LB;
- card->lbnr.init = NUM_LB;
- card->lbnr.max = MAX_LB;
- card->iovnr.min = MIN_IOVB;
- card->iovnr.init = NUM_IOVB;
- card->iovnr.max = MAX_IOVB;
- card->hbnr.min = MIN_HB;
- card->hbnr.init = NUM_HB;
- card->hbnr.max = MAX_HB;
-
- card->sm_handle = 0x00000000;
- card->sm_addr = 0x00000000;
- card->lg_handle = 0x00000000;
- card->lg_addr = 0x00000000;
-
- card->efbie = 1; /* To prevent push_rxbufs from enabling the interrupt */
-
- /* Allocate small buffers */
- skb_queue_head_init(&card->sbpool.queue);
- card->sbpool.count = 0; /* Not used */
- for (j = 0; j < NUM_SB; j++)
- {
- struct sk_buff *sb;
- sb = alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
- if (sb == NULL)
- {
- printk("nicstar%d: can't allocate %dth of %d small buffers.\n",
- i, j, NUM_SB);
- error = 13;
- ns_init_card_error(card, error);
- return error;
- }
- skb_queue_tail(&card->sbpool.queue, sb);
- skb_reserve(sb, NS_AAL0_HEADER);
- push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data), 0, 0);
- }
- /* Test for strange behaviour which leads to crashes */
- if ((bcount = ns_stat_sfbqc_get(readl(card->membase + STAT))) < card->sbnr.min)
- {
- printk("nicstar%d: Strange... Just allocated %d small buffers and sfbqc = %d.\n",
- i, j, bcount);
- error = 13;
- ns_init_card_error(card, error);
- return error;
- }
-
-
- /* Allocate large buffers */
- skb_queue_head_init(&card->lbpool.queue);
- card->lbpool.count = 0; /* Not used */
- for (j = 0; j < NUM_LB; j++)
- {
- struct sk_buff *lb;
- lb = alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
- if (lb == NULL)
- {
- printk("nicstar%d: can't allocate %dth of %d large buffers.\n",
- i, j, NUM_LB);
- error = 14;
- ns_init_card_error(card, error);
- return error;
- }
- skb_queue_tail(&card->lbpool.queue, lb);
- skb_reserve(lb, NS_SMBUFSIZE);
- push_rxbufs(card, BUF_LG, (u32) lb, (u32) virt_to_bus(lb->data), 0, 0);
- /* Due to the implementation of push_rxbufs() this is 1, not 0 */
- if (j == 1)
- {
- card->rcbuf = lb;
- card->rawch = (u32) virt_to_bus(lb->data);
- }
- }
- /* Test for strange behaviour which leads to crashes */
- if ((bcount = ns_stat_lfbqc_get(readl(card->membase + STAT))) < card->lbnr.min)
- {
- printk("nicstar%d: Strange... Just allocated %d large buffers and lfbqc = %d.\n",
- i, j, bcount);
- error = 14;
- ns_init_card_error(card, error);
- return error;
- }
-
-
- /* Allocate iovec buffers */
- skb_queue_head_init(&card->iovpool.queue);
- card->iovpool.count = 0;
- for (j = 0; j < NUM_IOVB; j++)
- {
- struct sk_buff *iovb;
- iovb = alloc_skb(NS_IOVBUFSIZE, GFP_KERNEL);
- if (iovb == NULL)
- {
- printk("nicstar%d: can't allocate %dth of %d iovec buffers.\n",
- i, j, NUM_IOVB);
- error = 15;
- ns_init_card_error(card, error);
- return error;
- }
- skb_queue_tail(&card->iovpool.queue, iovb);
- card->iovpool.count++;
- }
-
-
- /* Pre-allocate some huge buffers */
- skb_queue_head_init(&card->hbpool.queue);
- card->hbpool.count = 0;
- for (j = 0; j < NUM_HB; j++)
- {
- struct sk_buff *hb;
- hb = alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
- if (hb == NULL)
- {
- printk("nicstar%d: can't allocate %dth of %d huge buffers.\n",
- i, j, NUM_HB);
- error = 16;
- ns_init_card_error(card, error);
- return error;
- }
- skb_queue_tail(&card->hbpool.queue, hb);
- card->hbpool.count++;
- }
-
- card->in_handler = 0;
- card->in_poll = 0;
- card->intcnt = 0;
-
- /* Configure NICStAR */
- if (card->rct_size == 4096)
- ns_cfg_rctsize = NS_CFG_RCTSIZE_4096_ENTRIES;
- else /* (card->rct_size == 16384) */
- ns_cfg_rctsize = NS_CFG_RCTSIZE_16384_ENTRIES;
-
- card->efbie = 1;
- writel(NS_CFG_RXPATH |
- NS_CFG_SMBUFSIZE |
- NS_CFG_LGBUFSIZE |
- NS_CFG_EFBIE |
- NS_CFG_RSQSIZE |
- NS_CFG_VPIBITS |
- ns_cfg_rctsize |
- NS_CFG_RXINT_NODELAY |
- NS_CFG_RAWIE | /* Only enabled if RCQ_SUPPORT */
- NS_CFG_RSQAFIE |
- NS_CFG_TXEN |
- NS_CFG_TXIE |
- NS_CFG_TSQFIE_OPT, /* Only enabled if ENABLE_TSQFIE */
- card->membase + CFG);
-
- /* Register device */
- card->atmdev = atm_dev_register("nicstar", &atm_ops, -1, 0UL);
- if (card->atmdev == NULL)
- {
- printk("nicstar%d: can't register device.\n", i);
- error = 17;
- ns_init_card_error(card, error);
- return error;
- }
-
-#ifdef ESI_FROM_EPROM
- nicstar_read_eprom(card->membase, NICSTAR_EPROM_MAC_ADDR_OFFSET,
- card->atmdev->esi, 6);
- printk("nicstar%d: MAC address %02X:%02X:%02X:%02X:%02X:%02X\n", i,
- card->atmdev->esi[0], card->atmdev->esi[1], card->atmdev->esi[2],
- card->atmdev->esi[3], card->atmdev->esi[4], card->atmdev->esi[5]);
-#else
- card->atmdev->esi[0] = NS_ESI0;
- card->atmdev->esi[1] = NS_ESI1;
- card->atmdev->esi[2] = NS_ESI2;
- card->atmdev->esi[3] = NS_ESI3;
- card->atmdev->esi[4] = NS_ESI4;
- card->atmdev->esi[5] = NS_ESI5;
-#endif /* ESI_FROM_EPROM */
-
- card->atmdev->dev_data = card;
- card->atmdev->ci_range.vpi_bits = card->vpibits;
- card->atmdev->ci_range.vci_bits = card->vcibits;
-
- num_cards++;
-
- return error;
-}
-
-
-
-static void ns_init_card_error(ns_dev *card, int error)
-{
- if (error >= 17)
- {
- writel(0x00000000, card->membase + CFG);
- }
- if (error >= 16)
- {
- struct sk_buff *hb;
- while ((hb = skb_dequeue(&card->hbpool.queue)) != NULL)
- kfree_skb(hb);
- }
- if (error >= 15)
- {
- struct sk_buff *iovb;
- while ((iovb = skb_dequeue(&card->iovpool.queue)) != NULL)
- kfree_skb(iovb);
- }
- if (error >= 14)
- {
- struct sk_buff *lb;
- while ((lb = skb_dequeue(&card->lbpool.queue)) != NULL)
- kfree_skb(lb);
- }
- if (error >= 13)
- {
- struct sk_buff *sb;
- while ((sb = skb_dequeue(&card->sbpool.queue)) != NULL)
- kfree_skb(sb);
- free_scq(card->scq0, NULL);
- }
- if (error >= 12)
- {
- kfree(card->rsq.org);
- }
- if (error >= 11)
- {
- kfree(card->tsq.org);
- }
- if (error >= 10)
- {
- free_irq(card->pcidev->irq, card);
- }
- if (error >= 4)
- {
- iounmap((void *) card->membase);
- }
- if (error >= 3)
- {
- kfree(card);
- }
-}
-
-
-
-static scq_info *get_scq(int size, u32 scd)
-{
- scq_info *scq;
- int i;
-
- if (size != VBR_SCQSIZE && size != CBR_SCQSIZE)
- return (scq_info *) NULL;
-
- scq = (scq_info *) kmalloc(sizeof(scq_info), GFP_KERNEL);
- if (scq == (scq_info *) NULL)
- return (scq_info *) NULL;
- scq->org = kmalloc(2 * size, GFP_KERNEL);
- if (scq->org == NULL)
- {
- kfree(scq);
- return (scq_info *) NULL;
- }
- scq->skb = (struct sk_buff **) kmalloc(sizeof(struct sk_buff *) *
- (size / NS_SCQE_SIZE), GFP_KERNEL);
- if (scq->skb == (struct sk_buff **) NULL)
- {
- kfree(scq->org);
- kfree(scq);
- return (scq_info *) NULL;
- }
- scq->num_entries = size / NS_SCQE_SIZE;
- scq->base = (ns_scqe *) ALIGN_ADDRESS(scq->org, size);
- scq->next = scq->base;
- scq->last = scq->base + (scq->num_entries - 1);
- scq->tail = scq->last;
- scq->scd = scd;
- scq->num_entries = size / NS_SCQE_SIZE;
- scq->tbd_count = 0;
- scq->scqfull_waitq = NULL;
- scq->full = 0;
-
- for (i = 0; i < scq->num_entries; i++)
- scq->skb[i] = NULL;
-
- return scq;
-}
-
-
-
-/* For variable rate SCQ vcc must be NULL */
-static void free_scq(scq_info *scq, struct atm_vcc *vcc)
-{
- int i;
-
- if (scq->num_entries == VBR_SCQ_NUM_ENTRIES)
- for (i = 0; i < scq->num_entries; i++)
- {
- if (scq->skb[i] != NULL)
- {
- vcc = scq->skb[i]->atm.vcc;
- if (vcc->pop != NULL)
- vcc->pop(vcc, scq->skb[i]);
- else
- dev_kfree_skb(scq->skb[i]);
- }
- }
- else /* vcc must be != NULL */
- {
- if (vcc == NULL)
- {
- printk("nicstar: free_scq() called with vcc == NULL for fixed rate scq.");
- for (i = 0; i < scq->num_entries; i++)
- dev_kfree_skb(scq->skb[i]);
- }
- else
- for (i = 0; i < scq->num_entries; i++)
- {
- if (scq->skb[i] != NULL)
- {
- if (vcc->pop != NULL)
- vcc->pop(vcc, scq->skb[i]);
- else
- dev_kfree_skb(scq->skb[i]);
- }
- }
- }
- kfree(scq->skb);
- kfree(scq->org);
- kfree(scq);
-}
-
-
-
-/* The handles passed must be pointers to the sk_buff containing the small
- or large buffer(s) cast to u32. */
-static void push_rxbufs(ns_dev *card, u32 type, u32 handle1, u32 addr1,
- u32 handle2, u32 addr2)
-{
- u32 stat;
- unsigned long flags;
-
-
-#ifdef GENERAL_DEBUG
- if (!addr1)
- printk("nicstar%d: push_rxbufs called with addr1 = 0.\n", card->index);
-#endif /* GENERAL_DEBUG */
-
- stat = readl(card->membase + STAT);
- card->sbfqc = ns_stat_sfbqc_get(stat);
- card->lbfqc = ns_stat_lfbqc_get(stat);
- if (type == BUF_SM)
- {
- if (!addr2)
- {
- if (card->sm_addr)
- {
- addr2 = card->sm_addr;
- handle2 = card->sm_handle;
- card->sm_addr = 0x00000000;
- card->sm_handle = 0x00000000;
- }
- else /* (!sm_addr) */
- {
- card->sm_addr = addr1;
- card->sm_handle = handle1;
- }
- }
- }
- else /* type == BUF_LG */
- {
- if (!addr2)
- {
- if (card->lg_addr)
- {
- addr2 = card->lg_addr;
- handle2 = card->lg_handle;
- card->lg_addr = 0x00000000;
- card->lg_handle = 0x00000000;
- }
- else /* (!lg_addr) */
- {
- card->lg_addr = addr1;
- card->lg_handle = handle1;
- }
- }
- }
-
- if (addr2)
- {
- if (type == BUF_SM)
- {
- if (card->sbfqc >= card->sbnr.max)
- {
- skb_unlink((struct sk_buff *) handle1);
- kfree_skb((struct sk_buff *) handle1);
- skb_unlink((struct sk_buff *) handle2);
- kfree_skb((struct sk_buff *) handle2);
- return;
- }
- else
- card->sbfqc += 2;
- }
- else /* (type == BUF_LG) */
- {
- if (card->lbfqc >= card->lbnr.max)
- {
- skb_unlink((struct sk_buff *) handle1);
- kfree_skb((struct sk_buff *) handle1);
- skb_unlink((struct sk_buff *) handle2);
- kfree_skb((struct sk_buff *) handle2);
- return;
- }
- else
- card->lbfqc += 2;
- }
-
- save_flags(flags); cli();
-
- while (CMD_BUSY(card));
- writel(handle1, card->membase + DR0);
- writel(addr1, card->membase + DR1);
- writel(handle2, card->membase + DR2);
- writel(addr2, card->membase + DR3);
- writel(NS_CMD_WRITE_FREEBUFQ | (u32) type, card->membase + CMD);
-
- restore_flags(flags);
-
- XPRINTK("nicstar%d: Pushing %s buffers at 0x%x and 0x%x.\n", card->index,
- (type == BUF_SM ? "small" : "large"), addr1, addr2);
- }
-
- if (!card->efbie && card->sbfqc >= card->sbnr.min &&
- card->lbfqc >= card->lbnr.min)
- {
- card->efbie = 1;
- writel((readl(card->membase + CFG) | NS_CFG_EFBIE), card->membase + CFG);
- }
-
- return;
-}
-
-
-
-static void ns_irq_handler(int irq, void *dev_id, struct pt_regs *regs)
-{
- u32 stat_r;
- ns_dev *card;
-
- card = (ns_dev *) dev_id;
- card->intcnt++;
-
- PRINTK("nicstar%d: NICStAR generated an interrupt\n", card->index);
-
- if (card->in_handler)
- {
- printk("nicstar%d: Re-entering ns_irq_handler()???\n", card->index);
- return;
- }
- card->in_handler = 1;
- if (card->in_poll)
- {
- card->in_handler = 0;
- printk("nicstar%d: Called irq handler while in ns_poll()!?\n",
- card->index);
- return;
- }
-
- stat_r = readl(card->membase + STAT);
-
- /* Transmit Status Indicator has been written to T. S. Queue */
- if (stat_r & NS_STAT_TSIF)
- {
- TXPRINTK("nicstar%d: TSI interrupt\n", card->index);
- process_tsq(card);
- writel(NS_STAT_TSIF, card->membase + STAT);
- }
-
- /* Incomplete CS-PDU has been transmitted */
- if (stat_r & NS_STAT_TXICP)
- {
- writel(NS_STAT_TXICP, card->membase + STAT);
- TXPRINTK("nicstar%d: Incomplete CS-PDU transmitted.\n",
- card->index);
- }
-
- /* Transmit Status Queue 7/8 full */
- if (stat_r & NS_STAT_TSQF)
- {
- writel(NS_STAT_TSQF, card->membase + STAT);
- PRINTK("nicstar%d: TSQ full.\n", card->index);
- process_tsq(card);
- }
-
- /* Timer overflow */
- if (stat_r & NS_STAT_TMROF)
- {
- writel(NS_STAT_TMROF, card->membase + STAT);
- PRINTK("nicstar%d: Timer overflow.\n", card->index);
- }
-
- /* PHY device interrupt signal active */
- if (stat_r & NS_STAT_PHYI)
- {
- writel(NS_STAT_PHYI, card->membase + STAT);
- printk("nicstar%d: PHY interrupt.\n", card->index);
- }
-
- /* Small Buffer Queue is full */
- if (stat_r & NS_STAT_SFBQF)
- {
- writel(NS_STAT_SFBQF, card->membase + STAT);
- printk("nicstar%d: Small free buffer queue is full.\n", card->index);
- }
-
- /* Large Buffer Queue is full */
- if (stat_r & NS_STAT_LFBQF)
- {
- writel(NS_STAT_LFBQF, card->membase + STAT);
- printk("nicstar%d: Large free buffer queue is full.\n", card->index);
- }
-
- /* Receive Status Queue is full */
- if (stat_r & NS_STAT_RSQF)
- {
- writel(NS_STAT_RSQF, card->membase + STAT);
- printk("nicstar%d: RSQ full.\n", card->index);
- process_rsq(card);
- }
-
- /* Complete CS-PDU received */
- if (stat_r & NS_STAT_EOPDU)
- {
- RXPRINTK("nicstar%d: End of CS-PDU received.\n", card->index);
- process_rsq(card);
- writel(NS_STAT_EOPDU, card->membase + STAT);
- }
-
- /* Raw cell received */
- if (stat_r & NS_STAT_RAWCF)
- {
- writel(NS_STAT_RAWCF, card->membase + STAT);
-#ifndef RCQ_SUPPORT
- printk("nicstar%d: Raw cell received and no support yet...\n",
- card->index);
-#endif /* RCQ_SUPPORT */
- /* NOTE: the following procedure may keep a raw cell pending untill the
- next interrupt. As this preliminary support is only meant to
- avoid buffer leakage, this is not an issue. */
- while (readl(card->membase + RAWCT) != card->rawch)
- {
- ns_rcqe *rawcell;
-
- rawcell = (ns_rcqe *) bus_to_virt(card->rawch);
- if (ns_rcqe_islast(rawcell))
- {
- struct sk_buff *oldbuf;
-
- oldbuf = card->rcbuf;
- card->rcbuf = (struct sk_buff *) ns_rcqe_nextbufhandle(rawcell);
- card->rawch = (u32) virt_to_bus(card->rcbuf->data);
- recycle_rx_buf(card, oldbuf);
- }
- else
- card->rawch += NS_RCQE_SIZE;
- }
- }
-
- /* Small buffer queue is empty */
- if (stat_r & NS_STAT_SFBQE)
- {
- int i;
- struct sk_buff *sb;
-
- writel(NS_STAT_SFBQE, card->membase + STAT);
- printk("nicstar%d: Small free buffer queue empty.\n",
- card->index);
- for (i = 0; i < card->sbnr.min; i++)
- {
- sb = alloc_skb(NS_SMSKBSIZE, GFP_ATOMIC);
- if (sb == NULL)
- {
- writel(readl(card->membase + CFG) & ~NS_CFG_EFBIE, card->membase + CFG);
- card->efbie = 0;
- break;
- }
- skb_queue_tail(&card->sbpool.queue, sb);
- skb_reserve(sb, NS_AAL0_HEADER);
- push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data), 0, 0);
- }
- card->sbfqc = i;
- process_rsq(card);
- }
-
- /* Large buffer queue empty */
- if (stat_r & NS_STAT_LFBQE)
- {
- int i;
- struct sk_buff *lb;
-
- writel(NS_STAT_LFBQE, card->membase + STAT);
- printk("nicstar%d: Large free buffer queue empty.\n",
- card->index);
- for (i = 0; i < card->lbnr.min; i++)
- {
- lb = alloc_skb(NS_LGSKBSIZE, GFP_ATOMIC);
- if (lb == NULL)
- {
- writel(readl(card->membase + CFG) & ~NS_CFG_EFBIE, card->membase + CFG);
- card->efbie = 0;
- break;
- }
- skb_queue_tail(&card->lbpool.queue, lb);
- skb_reserve(lb, NS_SMBUFSIZE);
- push_rxbufs(card, BUF_LG, (u32) lb, (u32) virt_to_bus(lb->data), 0, 0);
- }
- card->lbfqc = i;
- process_rsq(card);
- }
-
- /* Receive Status Queue is 7/8 full */
- if (stat_r & NS_STAT_RSQAF)
- {
- writel(NS_STAT_RSQAF, card->membase + STAT);
- RXPRINTK("nicstar%d: RSQ almost full.\n", card->index);
- process_rsq(card);
- }
-
- card->in_handler = 0;
- PRINTK("nicstar%d: end of interrupt service\n", card->index);
-}
-
-
-
-static int ns_open(struct atm_vcc *vcc, short vpi, int vci)
-{
- ns_dev *card;
- vc_map *vc;
- int error;
- double tmpd;
- int tcr, tcra; /* target cell rate, and absolute value */
- int n = 0; /* Number of entries in the TST. Initialized to remove
- the compiler warning. */
- u32 u32d[4];
- int frscdi = 0; /* Index of the SCD. Initialized to remove the compiler
- warning. How I wish compilers were clever enough to
- tell which variables can truly be used
- uninitialized... */
- int inuse; /* tx or rx vc already in use by another vcc */
-
- card = (ns_dev *) vcc->dev->dev_data;
- PRINTK("nicstar%d: opening vpi.vci %d.%d \n", card->index, (int) vpi, vci);
- if (vcc->qos.aal != ATM_AAL5 && vcc->qos.aal != ATM_AAL0)
- {
- PRINTK("nicstar%d: unsupported AAL.\n", card->index);
- return -EINVAL;
- }
-
- if ((error = atm_find_ci(vcc, &vpi, &vci)))
- {
- PRINTK("nicstar%d: error in atm_find_ci().\n", card->index);
- return error;
- }
- vc = &(card->vcmap[vpi << card->vcibits | vci]);
- vcc->vpi = vpi;
- vcc->vci = vci;
- vcc->dev_data = vc;
-
- inuse = 0;
- if (vcc->qos.txtp.traffic_class != ATM_NONE && vc->tx)
- inuse = 1;
- if (vcc->qos.rxtp.traffic_class != ATM_NONE && vc->rx)
- inuse += 2;
- if (inuse)
- {
- printk("nicstar%d: %s vci already in use.\n", card->index,
- inuse == 1 ? "tx" : inuse == 2 ? "rx" : "tx and rx");
- return -EINVAL;
- }
-
- vcc->flags |= ATM_VF_ADDR;
-
- /* NOTE: You are not allowed to modify an open connection's QOS. To change
- that, remove the ATM_VF_PARTIAL flag checking. There may be other changes
- needed to do that. */
- if (!(vcc->flags & ATM_VF_PARTIAL))
- {
- scq_info *scq;
-
- vcc->flags |= ATM_VF_PARTIAL;
- if (vcc->qos.txtp.traffic_class == ATM_CBR)
- {
- /* Check requested cell rate and availability of SCD */
- if (vcc->qos.txtp.max_pcr == 0 && vcc->qos.txtp.pcr == 0 &&
- vcc->qos.txtp.min_pcr == 0)
- {
- PRINTK("nicstar%d: trying to open a CBR vc with cell rate = 0 \n",
- card->index);
- vcc->flags &= ~(ATM_VF_ADDR | ATM_VF_PARTIAL);
- return -EINVAL;
- }
-
- tcr = atm_pcr_goal(&(vcc->qos.txtp));
- tcra = tcr >= 0 ? tcr : -tcr;
-
- PRINTK("nicstar%d: target cell rate = %d.\n", card->index,
- vcc->qos.txtp.max_pcr);
-
- tmpd = ((double) tcra) * ((double) NS_TST_NUM_ENTRIES) /
- ((double) card->max_pcr);
-
- n = (int) tmpd;
- if (tcr > 0)
- {
- if (tmpd > (double) n) n++;
- }
- else if (tcr < 0)
- {
- if (tmpd < (double) n) n--;
- }
- else /* tcr == 0 */
- {
- if ((n = (card->tst_free_entries - NS_TST_RESERVED)) <= 0)
- {
- PRINTK("nicstar%d: no CBR bandwidth free.\n", card->index);
- vcc->flags &= ~(ATM_VF_ADDR | ATM_VF_PARTIAL);
- return -EINVAL;
- }
- }
-
- if (n == 0)
- {
- printk("nicstar%d: selected bandwidth < granularity.\n", card->index);
- vcc->flags &= ~(ATM_VF_ADDR | ATM_VF_PARTIAL);
- return -EINVAL;
- }
-
- if (vcc->qos.txtp.max_pcr > 0)
- {
- tmpd = (double) n * (double) card->max_pcr /
- (double) NS_TST_NUM_ENTRIES;
- if (tmpd > PCR_TOLERANCE * (double) vcc->qos.txtp.max_pcr)
- {
- PRINTK("nicstar%d: target cell rate exceeded requested max_pcr.\n",
- card->index);
- }
- }
-
- if (n > (card->tst_free_entries - NS_TST_RESERVED))
- {
- PRINTK("nicstar%d: not enough free CBR bandwidth.\n", card->index);
- vcc->flags &= ~(ATM_VF_ADDR | ATM_VF_PARTIAL);
- return -EINVAL;
- }
- else
- card->tst_free_entries -= n;
-
- XPRINTK("nicstar%d: writing %d tst entries.\n", card->index, n);
- for (frscdi = 0; frscdi < NS_FRSCD_NUM; frscdi++)
- {
- if (card->scd2vc[frscdi] == NULL)
- {
- card->scd2vc[frscdi] = vc;
- break;
- }
- }
- if (frscdi == NS_FRSCD_NUM)
- {
- PRINTK("nicstar%d: no SCD available for CBR channel.\n", card->index);
- card->tst_free_entries += n;
- vcc->flags &= ~(ATM_VF_ADDR | ATM_VF_PARTIAL);
- return -EBUSY;
- }
-
- vc->cbr_scd = NS_FRSCD + frscdi * NS_FRSCD_SIZE;
-
- scq = get_scq(CBR_SCQSIZE, vc->cbr_scd);
- if (scq == (scq_info *) NULL)
- {
- PRINTK("nicstar%d: can't get fixed rate SCQ.\n", card->index);
- card->scd2vc[frscdi] = NULL;
- card->tst_free_entries += n;
- vcc->flags &= ~(ATM_VF_ADDR | ATM_VF_PARTIAL);
- return -ENOMEM;
- }
- vc->scq = scq;
- u32d[0] = (u32) virt_to_bus(scq->base);
- u32d[1] = (u32) 0x00000000;
- u32d[2] = (u32) 0xffffffff;
- u32d[3] = (u32) 0x00000000;
- ns_write_sram(card, vc->cbr_scd, u32d, 4);
-
- fill_tst(card, n, vc);
- }
- else /* not CBR */
- {
- vc->cbr_scd = 0x00000000;
- vc->scq = card->scq0;
- }
-
- if (vcc->qos.txtp.traffic_class != ATM_NONE)
- {
- vc->tx = 1;
- vc->tx_vcc = vcc;
- vc->tbd_count = 0;
- }
- if (vcc->qos.rxtp.traffic_class != ATM_NONE)
- {
- u32 status;
-
- vc->rx = 1;
- vc->rx_vcc = vcc;
- vc->rx_iov = NULL;
-
- /* Open the connection in hardware */
- if (vcc->qos.aal == ATM_AAL5)
- status = NS_RCTE_AAL5 | NS_RCTE_CONNECTOPEN;
- else /* vcc->qos.aal == ATM_AAL0 */
- status = NS_RCTE_AAL0 | NS_RCTE_CONNECTOPEN;
-#ifdef RCQ_SUPPORT
- status |= NS_RCTE_RAWCELLINTEN;
-#endif /* RCQ_SUPPORT */
- ns_write_sram(card, NS_RCT + (vpi << card->vcibits | vci) *
- NS_RCT_ENTRY_SIZE, &status, 1);
- }
-
- }
-
- vcc->flags |= ATM_VF_READY;
- return 0;
-}
-
-
-
-static void ns_close(struct atm_vcc *vcc)
-{
- vc_map *vc;
- ns_dev *card;
- u32 data;
- int i;
-
- vc = vcc->dev_data;
- card = vcc->dev->dev_data;
- PRINTK("nicstar%d: closing vpi.vci %d.%d \n", card->index,
- (int) vcc->vpi, vcc->vci);
-
- vcc->flags &= ~(ATM_VF_READY);
-
- if (vcc->qos.rxtp.traffic_class != ATM_NONE)
- {
- u32 addr;
- unsigned long flags;
-
- addr = NS_RCT + (vcc->vpi << card->vcibits | vcc->vci) * NS_RCT_ENTRY_SIZE;
- save_flags(flags); cli();
- while(CMD_BUSY(card));
- writel(NS_CMD_CLOSE_CONNECTION | addr << 2, card->membase + CMD);
- restore_flags(flags);
-
- vc->rx = 0;
- if (vc->rx_iov != NULL)
- {
- struct sk_buff *iovb;
- u32 stat;
-
- stat = readl(card->membase + STAT);
- card->sbfqc = ns_stat_sfbqc_get(stat);
- card->lbfqc = ns_stat_lfbqc_get(stat);
-
- PRINTK("nicstar%d: closing a VC with pending rx buffers.\n",
- card->index);
- iovb = vc->rx_iov;
- recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data,
- iovb->atm.iovcnt);
- iovb->atm.iovcnt = 0;
- iovb->atm.vcc = NULL;
- save_flags(flags); cli();
- recycle_iov_buf(card, iovb);
- restore_flags(flags);
- vc->rx_iov = NULL;
- }
- }
-
- if (vcc->qos.txtp.traffic_class != ATM_NONE)
- {
- vc->tx = 0;
- }
-
- if (vcc->qos.txtp.traffic_class == ATM_CBR)
- {
- unsigned long flags;
- ns_scqe *scqep;
- scq_info *scq;
-
- scq = vc->scq;
-
- for (;;)
- {
- save_flags(flags); cli();
- scqep = scq->next;
- if (scqep == scq->base)
- scqep = scq->last;
- else
- scqep--;
- if (scqep == scq->tail)
- {
- restore_flags(flags);
- break;
- }
- /* If the last entry is not a TSR, place one in the SCQ in order to
- be able to completely drain it and then close. */
- if (!ns_scqe_is_tsr(scqep) && scq->tail != scq->next)
- {
- ns_scqe tsr;
- u32 scdi, scqi;
- u32 data;
- int index;
-
- tsr.word_1 = ns_tsr_mkword_1(NS_TSR_INTENABLE);
- scdi = (vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE;
- scqi = scq->next - scq->base;
- tsr.word_2 = ns_tsr_mkword_2(scdi, scqi);
- tsr.word_3 = 0x00000000;
- tsr.word_4 = 0x00000000;
- *scq->next = tsr;
- index = (int) scqi;
- scq->skb[index] = NULL;
- if (scq->next == scq->last)
- scq->next = scq->base;
- else
- scq->next++;
- data = (u32) virt_to_bus(scq->next);
- ns_write_sram(card, scq->scd, &data, 1);
- }
- schedule();
- restore_flags(flags);
- }
-
- /* Free all TST entries */
- data = NS_TST_OPCODE_VARIABLE;
- for (i = 0; i < NS_TST_NUM_ENTRIES; i++)
- {
- if (card->tste2vc[i] == vc)
- {
- ns_write_sram(card, card->tst_addr + i, &data, 1);
- card->tste2vc[i] = NULL;
- card->tst_free_entries++;
- }
- }
-
- card->scd2vc[(vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE] = NULL;
- free_scq(vc->scq, vcc);
- }
-
- vcc->dev_data = NULL;
- vcc->flags &= ~(ATM_VF_PARTIAL | ATM_VF_ADDR);
-
-#ifdef RX_DEBUG
- {
- u32 stat, cfg;
- stat = readl(card->membase + STAT);
- cfg = readl(card->membase + CFG);
- printk("STAT = 0x%08X CFG = 0x%08X \n", stat, cfg);
- printk("TSQ: base = 0x%08X next = 0x%08X last = 0x%08X TSQT = 0x%08X \n",
- (u32) card->tsq.base, (u32) card->tsq.next,(u32) card->tsq.last,
- readl(card->membase + TSQT));
- printk("RSQ: base = 0x%08X next = 0x%08X last = 0x%08X RSQT = 0x%08X \n",
- (u32) card->rsq.base, (u32) card->rsq.next,(u32) card->rsq.last,
- readl(card->membase + RSQT));
- printk("Empty free buffer queue interrupt %s \n",
- card->efbie ? "enabled" : "disabled");
- printk("SBCNT = %d count = %d LBCNT = %d count = %d \n",
- ns_stat_sfbqc_get(stat), card->sbpool.count,
- ns_stat_lfbqc_get(stat), card->lbpool.count);
- printk("hbpool.count = %d iovpool.count = %d \n",
- card->hbpool.count, card->iovpool.count);
- }
-#endif /* RX_DEBUG */
-}
-
-
-
-static void fill_tst(ns_dev *card, int n, vc_map *vc)
-{
- u32 new_tst;
- double c, q;
- int e, r;
- u32 data;
-
- /* It would be very complicated to keep the two TSTs synchronized while
- assuring that writes are only made to the inactive TST. So, for now I
- will use only one TST. If problems occur, I will change this again */
-
- new_tst = card->tst_addr;
-
- /* Fill procedure */
-
- for (e = 0; e < NS_TST_NUM_ENTRIES; e++)
- {
- if (card->tste2vc[e] == NULL)
- break;
- }
- if (e == NS_TST_NUM_ENTRIES)
- printk("nicstar%d: No free TST entries found. \n", card->index);
-
- r = n;
- c = 1.0;
- q = (double) n / (double) NS_TST_NUM_ENTRIES;
-
- data = ns_tste_make(NS_TST_OPCODE_FIXED, vc->cbr_scd);
-
- while (e < NS_TST_NUM_ENTRIES)
- {
- if (c >= 1.0 && card->tste2vc[e] == NULL)
- {
- card->tste2vc[e] = vc;
- ns_write_sram(card, new_tst + e, &data, 1);
- c -= 1.0;
- if (--r == 0)
- break;
- }
-
- e++;
- c += q;
- }
- if (r != 0)
- printk("nicstar%d: Not enough free TST entries. CBR lower than requested.\n",
- card->index);
-
- /* End of fill procedure */
-
- data = ns_tste_make(NS_TST_OPCODE_END, new_tst);
- ns_write_sram(card, new_tst + NS_TST_NUM_ENTRIES, &data, 1);
- ns_write_sram(card, card->tst_addr + NS_TST_NUM_ENTRIES, &data, 1);
- card->tst_addr = new_tst;
-}
-
-
-
-static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb)
-{
- ns_dev *card;
- vc_map *vc;
- scq_info *scq;
- unsigned long buflen;
- ns_scqe scqe;
- u32 flags; /* TBD flags, not CPU flags */
-
- card = vcc->dev->dev_data;
- TXPRINTK("nicstar%d: ns_send() called.\n", card->index);
- if ((vc = (vc_map *) vcc->dev_data) == NULL)
- {
- printk("nicstar%d: vcc->dev_data == NULL on ns_send().\n", card->index);
- vcc->stats->tx_err++;
- dev_kfree_skb(skb);
- return -EINVAL;
- }
-
- if (!vc->tx)
- {
- printk("nicstar%d: Trying to transmit on a non-tx VC.\n", card->index);
- vcc->stats->tx_err++;
- dev_kfree_skb(skb);
- return -EINVAL;
- }
-
- if (vcc->qos.aal != ATM_AAL5 && vcc->qos.aal != ATM_AAL0)
- {
- printk("nicstar%d: Only AAL0 and AAL5 are supported.\n", card->index);
- vcc->stats->tx_err++;
- dev_kfree_skb(skb);
- return -EINVAL;
- }
-
- if (skb->atm.iovcnt != 0)
- {
- printk("nicstar%d: No scatter-gather yet.\n", card->index);
- vcc->stats->tx_err++;
- dev_kfree_skb(skb);
- return -EINVAL;
- }
-
- skb->atm.vcc = vcc;
-
- if (vcc->qos.aal == ATM_AAL5)
- {
- buflen = (skb->len + 47 + 8) / 48 * 48; /* Multiple of 48 */
- flags = NS_TBD_AAL5;
- scqe.word_2 = (u32) virt_to_bus(skb->data);
- scqe.word_3 = (u32) skb->len;
- scqe.word_4 = ((u32) vcc->vpi) << NS_TBD_VPI_SHIFT |
- ((u32) vcc->vci) << NS_TBD_VCI_SHIFT;
- flags |= NS_TBD_EOPDU;
- }
- else /* (vcc->qos.aal == ATM_AAL0) */
- {
- buflen = ATM_CELL_PAYLOAD; /* i.e., 48 bytes */
- flags = NS_TBD_AAL0;
- scqe.word_2 = (u32) virt_to_bus(skb->data) + NS_AAL0_HEADER;
- scqe.word_3 = 0x00000000;
- if (*skb->data & 0x02) /* Payload type 1 - end of pdu */
- flags |= NS_TBD_EOPDU;
- scqe.word_4 = *((u32 *) skb->data) & ~NS_TBD_VC_MASK;
- /* Force the VPI/VCI to be the same as in VCC struct */
- scqe.word_4 |= (((u32) vcc->vpi) << NS_TBD_VPI_SHIFT |
- ((u32) vcc->vci) << NS_TBD_VCI_SHIFT) & NS_TBD_VC_MASK;
- }
-
- if (vcc->qos.txtp.traffic_class == ATM_CBR)
- {
- scqe.word_1 = ns_tbd_mkword_1_novbr(flags, (u32) buflen);
- scq = ((vc_map *) vcc->dev_data)->scq;
- }
- else
- {
- scqe.word_1 = ns_tbd_mkword_1(flags, (u32) 1, (u32) 1, (u32) buflen);
- scq = card->scq0;
- }
-
- if (push_scqe(card, vc, scq, &scqe, skb) != 0) /* Timeout pushing the TBD */
- {
- printk("nicstar%d: Timeout pushing TBD.\n", card->index);
- vcc->stats->tx_err++;
- dev_kfree_skb(skb);
- return -EIO;
- }
- vcc->stats->tx++;
-
- return 0;
-}
-
-
-
-static int push_scqe(ns_dev *card, vc_map *vc, scq_info *scq, ns_scqe *tbd,
- struct sk_buff *skb)
-{
- unsigned long flags;
- ns_scqe tsr;
- u32 scdi, scqi;
- int scq_is_vbr;
- u32 data;
- int index;
-
- if (scq->tail == scq->next)
- {
- save_flags(flags); cli();
- scq->full = 1;
- current->timeout = jiffies + SCQFULL_TIMEOUT;
- interruptible_sleep_on(&scq->scqfull_waitq);
- restore_flags(flags);
-
- if (scq->full)
- return 1;
- }
- *scq->next = *tbd;
- index = (int) (scq->next - scq->base);
- scq->skb[index] = skb;
- XPRINTK("nicstar%d: sending skb at 0x%x (pos %d).\n",
- card->index, (u32) skb, index);
- XPRINTK("nicstar%d: TBD written:\n0x%x\n0x%x\n0x%x\n0x%x\n at 0x%x.\n",
- card->index, tbd->word_1, tbd->word_2, tbd->word_3, tbd->word_4,
- (u32) scq->next);
- if (scq->next == scq->last)
- scq->next = scq->base;
- else
- scq->next++;
-
- vc->tbd_count++;
- if (scq->num_entries == VBR_SCQ_NUM_ENTRIES)
- {
- scq->tbd_count++;
- scq_is_vbr = 1;
- }
- else
- scq_is_vbr = 0;
-
- if (vc->tbd_count >= MAX_TBD_PER_VC || scq->tbd_count >= MAX_TBD_PER_SCQ)
- {
- if (scq->tail == scq->next)
- {
- save_flags(flags); cli();
- scq->full = 1;
- current->timeout = jiffies + SCQFULL_TIMEOUT;
- interruptible_sleep_on(&scq->scqfull_waitq);
- restore_flags(flags);
- }
-
- if (!scq->full)
- {
- tsr.word_1 = ns_tsr_mkword_1(NS_TSR_INTENABLE);
- if (scq_is_vbr)
- scdi = NS_TSR_SCDISVBR;
- else
- scdi = (vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE;
- scqi = scq->next - scq->base;
- tsr.word_2 = ns_tsr_mkword_2(scdi, scqi);
- tsr.word_3 = 0x00000000;
- tsr.word_4 = 0x00000000;
-
- *scq->next = tsr;
- index = (int) scqi;
- scq->skb[index] = NULL;
- XPRINTK("nicstar%d: TSR written:\n0x%x\n0x%x\n0x%x\n0x%x\n at 0x%x.\n",
- card->index, tsr.word_1, tsr.word_2, tsr.word_3, tsr.word_4,
- (u32) scq->next);
- if (scq->next == scq->last)
- scq->next = scq->base;
- else
- scq->next++;
- vc->tbd_count = 0;
- scq->tbd_count = 0;
- }
- else
- PRINTK("nicstar%d: Could not write TSI.\n", card->index);
- }
-
- data = (u32) virt_to_bus(scq->next);
- ns_write_sram(card, scq->scd, &data, 1);
-
- return 0;
-}
-
-
-
-static void process_tsq(ns_dev *card)
-{
- u32 scdi;
- scq_info *scq;
- ns_tsi *previous;
-
- if (ns_tsi_isempty(card->tsq.next))
- return;
- while (!ns_tsi_isempty(card->tsq.next))
- {
- if (!ns_tsi_tmrof(card->tsq.next))
- {
- scdi = ns_tsi_getscdindex(card->tsq.next);
- if (scdi == NS_TSI_SCDISVBR)
- scq = card->scq0;
- else
- {
- if (card->scd2vc[scdi] == NULL)
- {
- printk("nicstar%d: could not find VC from SCD index.\n",
- card->index);
- ns_tsi_init(card->tsq.next);
- return;
- }
- scq = card->scd2vc[scdi]->scq;
- }
- drain_scq(card, scq, ns_tsi_getscqpos(card->tsq.next));
- scq->full = 0;
- wake_up_interruptible(&(scq->scqfull_waitq));
- }
-
- ns_tsi_init(card->tsq.next);
- previous = card->tsq.next;
- if (card->tsq.next == card->tsq.last)
- card->tsq.next = card->tsq.base;
- else
- card->tsq.next++;
- }
- writel((((u32) previous) - ((u32) card->tsq.base)),
- card->membase + TSQH);
-}
-
-
-
-static void drain_scq(ns_dev *card, scq_info *scq, int pos)
-{
- struct atm_vcc *vcc;
- struct sk_buff *skb;
- int i;
-
- XPRINTK("nicstar%d: drain_scq() called, scq at 0x%x, pos %d.\n",
- card->index, (u32) scq, pos);
- if (pos >= scq->num_entries)
- {
- printk("nicstar%d: Bad index on drain_scq().\n", card->index);
- return;
- }
-
- i = (int) (scq->tail - scq->base);
- if (++i == scq->num_entries)
- i = 0;
- while (i != pos)
- {
- skb = scq->skb[i];
- XPRINTK("nicstar%d: freeing skb at 0x%x (index %d).\n",
- card->index, (u32) skb, i);
- if (skb != NULL)
- {
- vcc = skb->atm.vcc;
- if (vcc->pop != NULL)
- vcc->pop(vcc, skb);
- else
- dev_kfree_skb(skb);
- scq->skb[i] = NULL;
- }
- if (++i == scq->num_entries)
- i = 0;
- }
- scq->tail = scq->base + pos;
-}
-
-
-
-static void process_rsq(ns_dev *card)
-{
- ns_rsqe *previous;
-
- if (!ns_rsqe_valid(card->rsq.next))
- return;
- while (ns_rsqe_valid(card->rsq.next))
- {
- dequeue_rx(card, card->rsq.next);
- ns_rsqe_init(card->rsq.next);
- previous = card->rsq.next;
- if (card->rsq.next == card->rsq.last)
- card->rsq.next = card->rsq.base;
- else
- card->rsq.next++;
- }
- writel((((u32) previous) - ((u32) card->rsq.base)),
- card->membase + RSQH);
-}
-
-
-
-static void dequeue_rx(ns_dev *card, ns_rsqe *rsqe)
-{
- u32 vpi, vci;
- vc_map *vc;
- struct sk_buff *iovb;
- struct iovec *iov;
- struct atm_vcc *vcc;
- struct sk_buff *skb;
- unsigned short aal5_len;
- int len;
- u32 stat;
-
- stat = readl(card->membase + STAT);
- card->sbfqc = ns_stat_sfbqc_get(stat);
- card->lbfqc = ns_stat_lfbqc_get(stat);
-
- skb = (struct sk_buff *) rsqe->buffer_handle;
- vpi = ns_rsqe_vpi(rsqe);
- vci = ns_rsqe_vci(rsqe);
- if (vpi >= 1UL << card->vpibits || vci >= 1UL << card->vcibits)
- {
- printk("nicstar%d: SDU received for out-of-range vc %d.%d.\n",
- card->index, vpi, vci);
- recycle_rx_buf(card, skb);
- return;
- }
-
- vc = &(card->vcmap[vpi << card->vcibits | vci]);
- if (!vc->rx)
- {
- RXPRINTK("nicstar%d: SDU received on non-rx vc %d.%d.\n",
- card->index, vpi, vci);
- recycle_rx_buf(card, skb);
- return;
- }
-
- vcc = vc->rx_vcc;
-
- if (vcc->qos.aal == ATM_AAL0)
- {
- struct sk_buff *sb;
- unsigned char *cell;
- int i;
-
- cell = skb->data;
- for (i = ns_rsqe_cellcount(rsqe); i; i--)
- {
- if ((sb = alloc_skb(NS_SMSKBSIZE, GFP_ATOMIC)) == NULL)
- {
- printk("nicstar%d: Can't allocate buffers for aal0.\n",
- card->index);
- vcc->stats->rx_drop += i;
- break;
- }
- if (!atm_charge(vcc, sb->truesize))
- {
- RXPRINTK("nicstar%d: atm_charge() dropped aal0 packets.\n",
- card->index);
- vcc->stats->rx_drop += i - 1; /* already increased by 1 */
- kfree_skb(sb);
- break;
- }
- /* Rebuild the header */
- *((u32 *) sb->data) = rsqe->word_1 << 4 |
- (ns_rsqe_clp(rsqe) ? 0x00000001 : 0x00000000);
- if (i == 1 && ns_rsqe_eopdu(rsqe))
- *((u32 *) sb->data) |= 0x00000002;
- skb_put(sb, NS_AAL0_HEADER);
- memcpy(sb->tail, cell, ATM_CELL_PAYLOAD);
- skb_put(sb, ATM_CELL_PAYLOAD);
- sb->atm.vcc = vcc;
- sb->stamp = xtime;
- vcc->push(vcc, sb);
- vcc->stats->rx++;
- cell += ATM_CELL_PAYLOAD;
- }
-
- recycle_rx_buf(card, skb);
- return;
- }
-
- /* To reach this point, the AAL layer can only be AAL5 */
-
- if ((iovb = vc->rx_iov) == NULL)
- {
- iovb = skb_dequeue(&(card->iovpool.queue));
- if (iovb == NULL) /* No buffers in the queue */
- {
- iovb = alloc_skb(NS_IOVBUFSIZE, GFP_ATOMIC);
- if (iovb == NULL)
- {
- printk("nicstar%d: Out of iovec buffers.\n", card->index);
- vcc->stats->rx_drop++;
- recycle_rx_buf(card, skb);
- return;
- }
- }
- else
- if (--card->iovpool.count < card->iovnr.min)
- {
- struct sk_buff *new_iovb;
- if ((new_iovb = alloc_skb(NS_IOVBUFSIZE, GFP_ATOMIC)) != NULL)
- {
- skb_queue_tail(&card->iovpool.queue, new_iovb);
- card->iovpool.count++;
- }
- }
- vc->rx_iov = iovb;
- iovb->atm.iovcnt = 0;
- iovb->len = 0;
- iovb->tail = iovb->data = iovb->head;
- iovb->atm.vcc = vcc;
- /* IMPORTANT: a pointer to the sk_buff containing the small or large
- buffer is stored as iovec base, NOT a pointer to the
- small or large buffer itself. */
- }
- else if (iovb->atm.iovcnt >= NS_MAX_IOVECS)
- {
- printk("nicstar%d: received too big AAL5 SDU.\n", card->index);
- vcc->stats->rx_err++;
- recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data, NS_MAX_IOVECS);
- iovb->atm.iovcnt = 0;
- iovb->len = 0;
- iovb->tail = iovb->data = iovb->head;
- iovb->atm.vcc = vcc;
- }
- iov = &((struct iovec *) iovb->data)[iovb->atm.iovcnt++];
- iov->iov_base = (void *) skb;
- iov->iov_len = ns_rsqe_cellcount(rsqe) * 48;
- iovb->len += iov->iov_len;
-
- if (iovb->atm.iovcnt == 1)
- {
- if (skb->list != &card->sbpool.queue)
- {
- printk("nicstar%d: Expected a small buffer, and this is not one.\n",
- card->index);
- which_list(card, skb);
- vcc->stats->rx_err++;
- recycle_rx_buf(card, skb);
- vc->rx_iov = NULL;
- recycle_iov_buf(card, iovb);
- return;
- }
- }
- else /* iovb->atm.iovcnt >= 2 */
- {
- if (skb->list != &card->lbpool.queue)
- {
- printk("nicstar%d: Expected a large buffer, and this is not one.\n",
- card->index);
- which_list(card, skb);
- vcc->stats->rx_err++;
- recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data,
- iovb->atm.iovcnt);
- vc->rx_iov = NULL;
- recycle_iov_buf(card, iovb);
- return;
- }
- }
-
- if (ns_rsqe_eopdu(rsqe))
- {
- aal5_len = *((unsigned short *) ((u32) skb->data + iov->iov_len - 6));
- /* Swap byte order. Is it just me or the nicstar manual sais this should
- already be in little endian format? */
- aal5_len = ((aal5_len & 0x00ff) << 8 | (aal5_len & 0xff00) >> 8);
- len = (aal5_len == 0x0000) ? 0x10000 : aal5_len;
- if (ns_rsqe_crcerr(rsqe) ||
- len + 8 > iovb->len || len + (47 + 8) < iovb->len)
- {
- if (ns_rsqe_crcerr(rsqe))
- printk("nicstar%d: AAL5 CRC error.\n", card->index);
- else
- printk("nicstar%d: AAL5 PDU size mismatch.\n", card->index);
- vcc->stats->rx_err++;
- recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data, iovb->atm.iovcnt);
- vc->rx_iov = NULL;
- recycle_iov_buf(card, iovb);
- return;
- }
-
- /* By this point we (hopefully) have a complete SDU without errors. */
-
- if (iovb->atm.iovcnt == 1) /* Just a small buffer */
- {
- /* skb points to a small buffer */
- if (!atm_charge(vcc, skb->truesize))
- {
- push_rxbufs(card, BUF_SM, (u32) skb, (u32) virt_to_bus(skb->data),
- 0, 0);
- }
- else
- {
- skb_put(skb, len);
- dequeue_sm_buf(card, skb);
-#ifdef NS_USE_DESTRUCTORS
- skb->destructor = ns_sb_destructor;
-#endif /* NS_USE_DESTRUCTORS */
- skb->atm.vcc = vcc;
- skb->stamp = xtime;
- vcc->push(vcc, skb);
- vcc->stats->rx++;
- }
- }
- else if (iovb->atm.iovcnt == 2) /* One small plus one large buffer */
- {
- struct sk_buff *sb;
-
- sb = (struct sk_buff *) (iov - 1)->iov_base;
- /* skb points to a large buffer */
-
- if (len <= NS_SMBUFSIZE)
- {
- if (!atm_charge(vcc, sb->truesize))
- {
- push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data),
- 0, 0);
- }
- else
- {
- skb_put(sb, len);
- dequeue_sm_buf(card, sb);
-#ifdef NS_USE_DESTRUCTORS
- sb->destructor = ns_sb_destructor;
-#endif /* NS_USE_DESTRUCTORS */
- sb->atm.vcc = vcc;
- sb->stamp = xtime;
- vcc->push(vcc, sb);
- vcc->stats->rx++;
- }
-
- push_rxbufs(card, BUF_LG, (u32) skb,
- (u32) virt_to_bus(skb->data), 0, 0);
-
- }
- else /* len > NS_SMBUFSIZE, the usual case */
- {
- if (!atm_charge(vcc, skb->truesize))
- {
- push_rxbufs(card, BUF_LG, (u32) skb,
- (u32) virt_to_bus(skb->data), 0, 0);
- }
- else
- {
- dequeue_lg_buf(card, skb);
-#ifdef NS_USE_DESTRUCTORS
- skb->destructor = ns_lb_destructor;
-#endif /* NS_USE_DESTRUCTORS */
- skb_push(skb, NS_SMBUFSIZE);
- memcpy(skb->data, sb->data, NS_SMBUFSIZE);
- skb_put(skb, len - NS_SMBUFSIZE);
- skb->atm.vcc = vcc;
- skb->stamp = xtime;
- vcc->push(vcc, skb);
- vcc->stats->rx++;
- }
-
- push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data),
- 0, 0);
-
- }
-
- }
- else /* Must push a huge buffer */
- {
- struct sk_buff *hb, *sb, *lb;
- int remaining, tocopy;
- int j;
-
- hb = skb_dequeue(&(card->hbpool.queue));
- if (hb == NULL) /* No buffers in the queue */
- {
-
- hb = alloc_skb(NS_HBUFSIZE, GFP_ATOMIC);
- if (hb == NULL)
- {
- printk("nicstar%d: Out of huge buffers.\n", card->index);
- vcc->stats->rx_drop++;
- recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data,
- iovb->atm.iovcnt);
- vc->rx_iov = NULL;
- recycle_iov_buf(card, iovb);
- return;
- }
- else if (card->hbpool.count < card->hbnr.min)
- {
- struct sk_buff *new_hb;
- if ((new_hb = alloc_skb(NS_HBUFSIZE, GFP_ATOMIC)) != NULL)
- {
- skb_queue_tail(&card->hbpool.queue, new_hb);
- card->hbpool.count++;
- }
- }
- }
- else
- if (--card->hbpool.count < card->hbnr.min)
- {
- struct sk_buff *new_hb;
- if ((new_hb = alloc_skb(NS_HBUFSIZE, GFP_ATOMIC)) != NULL)
- {
- skb_queue_tail(&card->hbpool.queue, new_hb);
- card->hbpool.count++;
- }
- if (card->hbpool.count < card->hbnr.min)
- {
- if ((new_hb = alloc_skb(NS_HBUFSIZE, GFP_ATOMIC)) != NULL)
- {
- skb_queue_tail(&card->hbpool.queue, new_hb);
- card->hbpool.count++;
- }
- }
- }
-
- iov = (struct iovec *) iovb->data;
-
- if (!atm_charge(vcc, hb->truesize))
- {
- recycle_iovec_rx_bufs(card, iov, iovb->atm.iovcnt);
- if (card->hbpool.count < card->hbnr.max)
- {
- skb_queue_tail(&card->hbpool.queue, hb);
- card->hbpool.count++;
- }
- else
- kfree_skb(hb);
- }
- else
- {
- /* Copy the small buffer to the huge buffer */
- sb = (struct sk_buff *) iov->iov_base;
- memcpy(hb->data, sb->data, iov->iov_len);
- skb_put(hb, iov->iov_len);
- remaining = len - iov->iov_len;
- iov++;
- /* Free the small buffer */
- push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data),
- 0, 0);
-
- /* Copy all large buffers to the huge buffer and free them */
- for (j = 1; j < iovb->atm.iovcnt; j++)
- {
- lb = (struct sk_buff *) iov->iov_base;
- tocopy = MIN(remaining, iov->iov_len);
- memcpy(hb->tail, lb->data, tocopy);
- skb_put(hb, tocopy);
- iov++;
- remaining -= tocopy;
- push_rxbufs(card, BUF_LG, (u32) lb,
- (u32) virt_to_bus(lb->data), 0, 0);
- }
-#ifdef EXTRA_DEBUG
- if (remaining != 0 || hb->len != len)
- printk("nicstar%d: Huge buffer len mismatch.\n", card->index);
-#endif /* EXTRA_DEBUG */
- hb->atm.vcc = vcc;
-#ifdef NS_USE_DESTRUCTORS
- hb->destructor = ns_hb_destructor;
-#endif /* NS_USE_DESTRUCTORS */
- hb->stamp = xtime;
- vcc->push(vcc, hb);
- vcc->stats->rx++;
- }
- }
-
- vc->rx_iov = NULL;
- recycle_iov_buf(card, iovb);
- }
-
-}
-
-
-
-#ifdef NS_USE_DESTRUCTORS
-
-static void ns_sb_destructor(struct sk_buff *sb)
-{
- ns_dev *card;
- u32 stat;
-
- card = (ns_dev *) sb->atm.vcc->dev->dev_data;
- stat = readl(card->membase + STAT);
- card->sbfqc = ns_stat_sfbqc_get(stat);
- card->lbfqc = ns_stat_lfbqc_get(stat);
-
- do
- {
- sb = alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
- if (sb == NULL)
- break;
- skb_queue_tail(&card->sbpool.queue, sb);
- skb_reserve(sb, NS_AAL0_HEADER);
- push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data), 0, 0);
- } while (card->sbfqc < card->sbnr.min);
-}
-
-
-
-static void ns_lb_destructor(struct sk_buff *lb)
-{
- ns_dev *card;
- u32 stat;
-
- card = (ns_dev *) lb->atm.vcc->dev->dev_data;
- stat = readl(card->membase + STAT);
- card->sbfqc = ns_stat_sfbqc_get(stat);
- card->lbfqc = ns_stat_lfbqc_get(stat);
-
- do
- {
- lb = alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
- if (lb == NULL)
- break;
- skb_queue_tail(&card->lbpool.queue, lb);
- skb_reserve(lb, NS_SMBUFSIZE);
- push_rxbufs(card, BUF_LG, (u32) lb, (u32) virt_to_bus(lb->data), 0, 0);
- } while (card->lbfqc < card->lbnr.min);
-}
-
-
-
-static void ns_hb_destructor(struct sk_buff *hb)
-{
- ns_dev *card;
-
- card = (ns_dev *) hb->atm.vcc->dev->dev_data;
-
- while (card->hbpool.count < card->hbnr.init)
- {
- hb = alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
- if (hb == NULL)
- break;
- skb_queue_tail(&card->hbpool.queue, hb);
- card->hbpool.count++;
- }
-}
-
-#endif /* NS_USE_DESTRUCTORS */
-
-
-
-static void recycle_rx_buf(ns_dev *card, struct sk_buff *skb)
-{
- if (skb->list == &card->sbpool.queue)
- push_rxbufs(card, BUF_SM, (u32) skb, (u32) virt_to_bus(skb->data), 0, 0);
- else if (skb->list == &card->lbpool.queue)
- push_rxbufs(card, BUF_LG, (u32) skb, (u32) virt_to_bus(skb->data), 0, 0);
- else
- {
- printk("nicstar%d: What kind of rx buffer is this?\n", card->index);
- kfree_skb(skb);
- }
-}
-
-
-
-static void recycle_iovec_rx_bufs(ns_dev *card, struct iovec *iov, int count)
-{
- struct sk_buff *skb;
-
- for (; count > 0; count--)
- {
- skb = (struct sk_buff *) (iov++)->iov_base;
- if (skb->list == &card->sbpool.queue)
- push_rxbufs(card, BUF_SM, (u32) skb, (u32) virt_to_bus(skb->data),
- 0, 0);
- else if (skb->list == &card->lbpool.queue)
- push_rxbufs(card, BUF_LG, (u32) skb, (u32) virt_to_bus(skb->data),
- 0, 0);
- else
- {
- printk("nicstar%d: What kind of rx buffer is this?\n", card->index);
- kfree_skb(skb);
- }
- }
-}
-
-
-
-static void recycle_iov_buf(ns_dev *card, struct sk_buff *iovb)
-{
- if (card->iovpool.count < card->iovnr.max)
- {
- skb_queue_tail(&card->iovpool.queue, iovb);
- card->iovpool.count++;
- }
- else
- kfree_skb(iovb);
-}
-
-
-
-static void dequeue_sm_buf(ns_dev *card, struct sk_buff *sb)
-{
- skb_unlink(sb);
-#ifdef NS_USE_DESTRUCTORS
- if (card->sbfqc < card->sbnr.min)
-#else
- if (card->sbfqc < card->sbnr.init)
- {
- struct sk_buff *new_sb;
- if ((new_sb = alloc_skb(NS_SMSKBSIZE, GFP_ATOMIC)) != NULL)
- {
- skb_queue_tail(&card->sbpool.queue, new_sb);
- skb_reserve(new_sb, NS_AAL0_HEADER);
- push_rxbufs(card, BUF_SM, (u32) new_sb,
- (u32) virt_to_bus(new_sb->data), 0, 0);
- }
- }
- if (card->sbfqc < card->sbnr.init)
-#endif /* NS_USE_DESTRUCTORS */
- {
- struct sk_buff *new_sb;
- if ((new_sb = alloc_skb(NS_SMSKBSIZE, GFP_ATOMIC)) != NULL)
- {
- skb_queue_tail(&card->sbpool.queue, new_sb);
- skb_reserve(new_sb, NS_AAL0_HEADER);
- push_rxbufs(card, BUF_SM, (u32) new_sb,
- (u32) virt_to_bus(new_sb->data), 0, 0);
- }
- }
-}
-
-
-
-static void dequeue_lg_buf(ns_dev *card, struct sk_buff *lb)
-{
- skb_unlink(lb);
-#ifdef NS_USE_DESTRUCTORS
- if (card->lbfqc < card->lbnr.min)
-#else
- if (card->lbfqc < card->lbnr.init)
- {
- struct sk_buff *new_lb;
- if ((new_lb = alloc_skb(NS_LGSKBSIZE, GFP_ATOMIC)) != NULL)
- {
- skb_queue_tail(&card->lbpool.queue, new_lb);
- skb_reserve(new_lb, NS_SMBUFSIZE);
- push_rxbufs(card, BUF_LG, (u32) new_lb,
- (u32) virt_to_bus(new_lb->data), 0, 0);
- }
- }
- if (card->lbfqc < card->lbnr.init)
-#endif /* NS_USE_DESTRUCTORS */
- {
- struct sk_buff *new_lb;
- if ((new_lb = alloc_skb(NS_LGSKBSIZE, GFP_ATOMIC)) != NULL)
- {
- skb_queue_tail(&card->lbpool.queue, new_lb);
- skb_reserve(new_lb, NS_SMBUFSIZE);
- push_rxbufs(card, BUF_LG, (u32) new_lb,
- (u32) virt_to_bus(new_lb->data), 0, 0);
- }
- }
-}
-
-
-
-static int ns_proc_read(struct atm_dev *dev, loff_t *pos, char *page)
-{
- u32 stat;
- ns_dev *card;
- int left;
-
- left = (int) *pos;
- card = (ns_dev *) dev->dev_data;
- stat = readl(card->membase + STAT);
- if (!left--)
- return sprintf(page, "Pool count min init max \n");
- if (!left--)
- return sprintf(page, "Small %5d %5d %5d %5d \n",
- ns_stat_sfbqc_get(stat), card->sbnr.min, card->sbnr.init,
- card->sbnr.max);
- if (!left--)
- return sprintf(page, "Large %5d %5d %5d %5d \n",
- ns_stat_lfbqc_get(stat), card->lbnr.min, card->lbnr.init,
- card->lbnr.max);
- if (!left--)
- return sprintf(page, "Huge %5d %5d %5d %5d \n", card->hbpool.count,
- card->hbnr.min, card->hbnr.init, card->hbnr.max);
- if (!left--)
- return sprintf(page, "Iovec %5d %5d %5d %5d \n", card->iovpool.count,
- card->iovnr.min, card->iovnr.init, card->iovnr.max);
- if (!left--)
- {
- int retval;
- retval = sprintf(page, "Interrupt counter: %u \n", card->intcnt);
- card->intcnt = 0;
- return retval;
- }
- /* Dump 25.6 Mbps PHY registers */
- if (card->max_pcr == IDT_25_PCR && !left--)
- {
- u32 phy_regs[4];
- u32 i;
-
- for (i = 0; i < 4; i++)
- {
- while (CMD_BUSY(card));
- writel(NS_CMD_READ_UTILITY | 0x00000200 | i, card->membase + CMD);
- while (CMD_BUSY(card));
- phy_regs[i] = readl(card->membase + DR0) & 0x000000FF;
- }
-
- return sprintf(page, "PHY regs: 0x%02X 0x%02X 0x%02X 0x%02X \n",
- phy_regs[0], phy_regs[1], phy_regs[2], phy_regs[3]);
- }
-#if 0
- /* Dump TST */
- if (left-- < NS_TST_NUM_ENTRIES)
- {
- if (card->tste2vc[left + 1] == NULL)
- return sprintf(page, "%5d - VBR/UBR \n", left + 1);
- else
- return sprintf(page, "%5d - %d %d \n", left + 1,
- card->tste2vc[left + 1]->tx_vcc->vpi,
- card->tste2vc[left + 1]->tx_vcc->vci);
- }
-#endif /* 0 */
- return 0;
-}
-
-
-
-static int ns_ioctl(struct atm_dev *dev, unsigned int cmd, void *arg)
-{
- ns_dev *card;
- pool_levels pl;
- int btype;
- unsigned long flags;
-
- card = dev->dev_data;
- switch (cmd)
- {
- case NS_GETPSTAT:
- if (get_user(pl.buftype, &((pool_levels *) arg)->buftype))
- return -EFAULT;
- switch (pl.buftype)
- {
- case NS_BUFTYPE_SMALL:
- pl.count = ns_stat_sfbqc_get(readl(card->membase + STAT));
- pl.level.min = card->sbnr.min;
- pl.level.init = card->sbnr.init;
- pl.level.max = card->sbnr.max;
- break;
-
- case NS_BUFTYPE_LARGE:
- pl.count = ns_stat_lfbqc_get(readl(card->membase + STAT));
- pl.level.min = card->lbnr.min;
- pl.level.init = card->lbnr.init;
- pl.level.max = card->lbnr.max;
- break;
-
- case NS_BUFTYPE_HUGE:
- pl.count = card->hbpool.count;
- pl.level.min = card->hbnr.min;
- pl.level.init = card->hbnr.init;
- pl.level.max = card->hbnr.max;
- break;
-
- case NS_BUFTYPE_IOVEC:
- pl.count = card->iovpool.count;
- pl.level.min = card->iovnr.min;
- pl.level.init = card->iovnr.init;
- pl.level.max = card->iovnr.max;
- break;
-
- default:
- return -EINVAL;
-
- }
- if (!copy_to_user((pool_levels *) arg, &pl, sizeof(pl)))
- return (sizeof(pl));
- else
- return -EFAULT;
-
- case NS_SETBUFLEV:
- if (!suser())
- return -EPERM;
- if (copy_from_user(&pl, (pool_levels *) arg, sizeof(pl)))
- return -EFAULT;
- if (pl.level.min >= pl.level.init || pl.level.init >= pl.level.max)
- return -EINVAL;
- if (pl.level.min == 0)
- return -EINVAL;
- switch (pl.buftype)
- {
- case NS_BUFTYPE_SMALL:
- if (pl.level.max > TOP_SB)
- return -EINVAL;
- card->sbnr.min = pl.level.min;
- card->sbnr.init = pl.level.init;
- card->sbnr.max = pl.level.max;
- break;
-
- case NS_BUFTYPE_LARGE:
- if (pl.level.max > TOP_LB)
- return -EINVAL;
- card->lbnr.min = pl.level.min;
- card->lbnr.init = pl.level.init;
- card->lbnr.max = pl.level.max;
- break;
-
- case NS_BUFTYPE_HUGE:
- if (pl.level.max > TOP_HB)
- return -EINVAL;
- card->hbnr.min = pl.level.min;
- card->hbnr.init = pl.level.init;
- card->hbnr.max = pl.level.max;
- break;
-
- case NS_BUFTYPE_IOVEC:
- if (pl.level.max > TOP_IOVB)
- return -EINVAL;
- card->iovnr.min = pl.level.min;
- card->iovnr.init = pl.level.init;
- card->iovnr.max = pl.level.max;
- break;
-
- default:
- return -EINVAL;
-
- }
- return 0;
-
- case NS_ADJBUFLEV:
- if (!suser())
- return -EPERM;
- btype = (int) arg; /* an int is the same size as a pointer */
- switch (btype)
- {
- case NS_BUFTYPE_SMALL:
- while (card->sbfqc < card->sbnr.init)
- {
- struct sk_buff *sb;
-
- sb = alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
- if (sb == NULL)
- return -ENOMEM;
- skb_queue_tail(&card->sbpool.queue, sb);
- skb_reserve(sb, NS_AAL0_HEADER);
- push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data), 0, 0);
- }
- break;
-
- case NS_BUFTYPE_LARGE:
- while (card->lbfqc < card->lbnr.init)
- {
- struct sk_buff *lb;
-
- lb = alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
- if (lb == NULL)
- return -ENOMEM;
- skb_queue_tail(&card->lbpool.queue, lb);
- skb_reserve(lb, NS_SMBUFSIZE);
- push_rxbufs(card, BUF_LG, (u32) lb, (u32) virt_to_bus(lb->data), 0, 0);
- }
- break;
-
- case NS_BUFTYPE_HUGE:
- while (card->hbpool.count > card->hbnr.init)
- {
- struct sk_buff *hb;
-
- save_flags(flags); cli();
- hb = skb_dequeue(&card->hbpool.queue);
- card->hbpool.count--;
- restore_flags(flags);
- if (hb == NULL)
- printk("nicstar%d: huge buffer count inconsistent.\n",
- card->index);
- else
- kfree_skb(hb);
-
- }
- while (card->hbpool.count < card->hbnr.init)
- {
- struct sk_buff *hb;
-
- hb = alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
- if (hb == NULL)
- return -ENOMEM;
- save_flags(flags); cli();
- skb_queue_tail(&card->hbpool.queue, hb);
- card->hbpool.count++;
- restore_flags(flags);
- }
- break;
-
- case NS_BUFTYPE_IOVEC:
- while (card->iovpool.count > card->iovnr.init)
- {
- struct sk_buff *iovb;
-
- save_flags(flags); cli();
- iovb = skb_dequeue(&card->iovpool.queue);
- card->iovpool.count--;
- restore_flags(flags);
- if (iovb == NULL)
- printk("nicstar%d: iovec buffer count inconsistent.\n",
- card->index);
- else
- kfree_skb(iovb);
-
- }
- while (card->iovpool.count < card->iovnr.init)
- {
- struct sk_buff *iovb;
-
- iovb = alloc_skb(NS_IOVBUFSIZE, GFP_KERNEL);
- if (iovb == NULL)
- return -ENOMEM;
- save_flags(flags); cli();
- skb_queue_tail(&card->iovpool.queue, iovb);
- card->iovpool.count++;
- restore_flags(flags);
- }
- break;
-
- default:
- return -EINVAL;
-
- }
- return 0;
-
- default:
- if (dev->phy->ioctl == NULL) return -EINVAL;
- return dev->phy->ioctl(dev, cmd, arg);
- }
-}
-
-
-
-static void which_list(ns_dev *card, struct sk_buff *skb)
-{
- printk("It's a %s buffer.\n", skb->list == &card->sbpool.queue ?
- "small" : skb->list == &card->lbpool.queue ? "large" :
- skb->list == &card->hbpool.queue ? "huge" :
- skb->list == &card->iovpool.queue ? "iovec" : "unknown");
-}
-
-
-
-static void ns_poll(unsigned long arg)
-{
- int i;
- ns_dev *card;
- unsigned long flags;
- u32 stat_r, stat_w;
-
- PRINTK("nicstar: Entering ns_poll().\n");
- for (i = 0; i < num_cards; i++)
- {
- card = cards[i];
- save_flags(flags); cli();
- if (card->in_poll)
- {
- printk("nicstar: Re-entering ns_poll()???\n");
- continue;
- }
- card->in_poll = 1;
- if (card->in_handler)
- {
- card->in_poll = 0;
- printk("nicstar%d: ns_poll called while in interrupt handler!?\n",
- card->index);
- continue;
- }
-
- stat_w = 0;
- stat_r = readl(card->membase + STAT);
- if (stat_r & NS_STAT_TSIF)
- stat_w |= NS_STAT_TSIF;
- if (stat_r & NS_STAT_EOPDU)
- stat_w |= NS_STAT_EOPDU;
-
- process_tsq(card);
- process_rsq(card);
-
- writel(card->membase + STAT, stat_w);
- card->in_poll = 0;
- restore_flags(flags);
- }
- mod_timer(&ns_timer, jiffies + NS_POLL_PERIOD);
- PRINTK("nicstar: Leaving ns_poll().\n");
-}
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)