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60063497a9
This allows us to move duplicated code in <asm/atomic.h> (atomic_inc_not_zero() for now) to <linux/atomic.h> Signed-off-by: Arun Sharma <asharma@fb.com> Reviewed-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: David Miller <davem@davemloft.net> Cc: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2875 lines
75 KiB
C
2875 lines
75 KiB
C
/*
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* nicstar.c
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*
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* Device driver supporting CBR for IDT 77201/77211 "NICStAR" based cards.
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*
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* IMPORTANT: The included file nicstarmac.c was NOT WRITTEN BY ME.
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* It was taken from the frle-0.22 device driver.
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* As the file doesn't have a copyright notice, in the file
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* nicstarmac.copyright I put the copyright notice from the
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* frle-0.22 device driver.
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* Some code is based on the nicstar driver by M. Welsh.
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*
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* Author: Rui Prior (rprior@inescn.pt)
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* PowerPC support by Jay Talbott (jay_talbott@mcg.mot.com) April 1999
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*
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*
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* (C) INESC 1999
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*/
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/*
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* IMPORTANT INFORMATION
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*
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* There are currently three types of spinlocks:
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*
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* 1 - Per card interrupt spinlock (to protect structures and such)
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* 2 - Per SCQ scq spinlock
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* 3 - Per card resource spinlock (to access registers, etc.)
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*
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* These must NEVER be grabbed in reverse order.
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*
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*/
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/* Header files */
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/skbuff.h>
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#include <linux/atmdev.h>
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#include <linux/atm.h>
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#include <linux/pci.h>
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#include <linux/dma-mapping.h>
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#include <linux/types.h>
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#include <linux/string.h>
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <linux/sched.h>
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#include <linux/timer.h>
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#include <linux/interrupt.h>
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#include <linux/bitops.h>
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#include <linux/slab.h>
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#include <linux/idr.h>
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#include <asm/io.h>
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#include <asm/uaccess.h>
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#include <linux/atomic.h>
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#include "nicstar.h"
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#ifdef CONFIG_ATM_NICSTAR_USE_SUNI
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#include "suni.h"
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#endif /* CONFIG_ATM_NICSTAR_USE_SUNI */
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#ifdef CONFIG_ATM_NICSTAR_USE_IDT77105
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#include "idt77105.h"
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#endif /* CONFIG_ATM_NICSTAR_USE_IDT77105 */
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/* Additional code */
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#include "nicstarmac.c"
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/* Configurable parameters */
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#undef PHY_LOOPBACK
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#undef TX_DEBUG
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#undef RX_DEBUG
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#undef GENERAL_DEBUG
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#undef EXTRA_DEBUG
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#undef NS_USE_DESTRUCTORS /* For now keep this undefined unless you know
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you're going to use only raw ATM */
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/* Do not touch these */
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#ifdef TX_DEBUG
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#define TXPRINTK(args...) printk(args)
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#else
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#define TXPRINTK(args...)
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#endif /* TX_DEBUG */
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#ifdef RX_DEBUG
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#define RXPRINTK(args...) printk(args)
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#else
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#define RXPRINTK(args...)
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#endif /* RX_DEBUG */
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#ifdef GENERAL_DEBUG
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#define PRINTK(args...) printk(args)
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#else
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#define PRINTK(args...)
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#endif /* GENERAL_DEBUG */
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#ifdef EXTRA_DEBUG
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#define XPRINTK(args...) printk(args)
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#else
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#define XPRINTK(args...)
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#endif /* EXTRA_DEBUG */
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/* Macros */
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#define CMD_BUSY(card) (readl((card)->membase + STAT) & NS_STAT_CMDBZ)
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#define NS_DELAY mdelay(1)
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#define PTR_DIFF(a, b) ((u32)((unsigned long)(a) - (unsigned long)(b)))
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#ifndef ATM_SKB
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#define ATM_SKB(s) (&(s)->atm)
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#endif
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#define scq_virt_to_bus(scq, p) \
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(scq->dma + ((unsigned long)(p) - (unsigned long)(scq)->org))
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/* Function declarations */
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static u32 ns_read_sram(ns_dev * card, u32 sram_address);
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static void ns_write_sram(ns_dev * card, u32 sram_address, u32 * value,
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int count);
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static int __devinit ns_init_card(int i, struct pci_dev *pcidev);
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static void __devinit ns_init_card_error(ns_dev * card, int error);
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static scq_info *get_scq(ns_dev *card, int size, u32 scd);
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static void free_scq(ns_dev *card, scq_info * scq, struct atm_vcc *vcc);
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static void push_rxbufs(ns_dev *, struct sk_buff *);
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static irqreturn_t ns_irq_handler(int irq, void *dev_id);
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static int ns_open(struct atm_vcc *vcc);
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static void ns_close(struct atm_vcc *vcc);
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static void fill_tst(ns_dev * card, int n, vc_map * vc);
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static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb);
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static int push_scqe(ns_dev * card, vc_map * vc, scq_info * scq, ns_scqe * tbd,
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struct sk_buff *skb);
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static void process_tsq(ns_dev * card);
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static void drain_scq(ns_dev * card, scq_info * scq, int pos);
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static void process_rsq(ns_dev * card);
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static void dequeue_rx(ns_dev * card, ns_rsqe * rsqe);
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#ifdef NS_USE_DESTRUCTORS
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static void ns_sb_destructor(struct sk_buff *sb);
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static void ns_lb_destructor(struct sk_buff *lb);
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static void ns_hb_destructor(struct sk_buff *hb);
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#endif /* NS_USE_DESTRUCTORS */
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static void recycle_rx_buf(ns_dev * card, struct sk_buff *skb);
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static void recycle_iovec_rx_bufs(ns_dev * card, struct iovec *iov, int count);
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static void recycle_iov_buf(ns_dev * card, struct sk_buff *iovb);
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static void dequeue_sm_buf(ns_dev * card, struct sk_buff *sb);
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static void dequeue_lg_buf(ns_dev * card, struct sk_buff *lb);
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static int ns_proc_read(struct atm_dev *dev, loff_t * pos, char *page);
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static int ns_ioctl(struct atm_dev *dev, unsigned int cmd, void __user * arg);
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#ifdef EXTRA_DEBUG
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static void which_list(ns_dev * card, struct sk_buff *skb);
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#endif
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static void ns_poll(unsigned long arg);
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static int ns_parse_mac(char *mac, unsigned char *esi);
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static void ns_phy_put(struct atm_dev *dev, unsigned char value,
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unsigned long addr);
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static unsigned char ns_phy_get(struct atm_dev *dev, unsigned long addr);
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/* Global variables */
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static struct ns_dev *cards[NS_MAX_CARDS];
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static unsigned num_cards;
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static struct atmdev_ops atm_ops = {
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.open = ns_open,
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.close = ns_close,
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.ioctl = ns_ioctl,
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.send = ns_send,
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.phy_put = ns_phy_put,
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.phy_get = ns_phy_get,
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.proc_read = ns_proc_read,
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.owner = THIS_MODULE,
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};
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static struct timer_list ns_timer;
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static char *mac[NS_MAX_CARDS];
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module_param_array(mac, charp, NULL, 0);
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MODULE_LICENSE("GPL");
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/* Functions */
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static int __devinit nicstar_init_one(struct pci_dev *pcidev,
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const struct pci_device_id *ent)
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{
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static int index = -1;
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unsigned int error;
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index++;
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cards[index] = NULL;
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error = ns_init_card(index, pcidev);
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if (error) {
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cards[index--] = NULL; /* don't increment index */
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goto err_out;
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}
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return 0;
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err_out:
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return -ENODEV;
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}
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static void __devexit nicstar_remove_one(struct pci_dev *pcidev)
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{
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int i, j;
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ns_dev *card = pci_get_drvdata(pcidev);
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struct sk_buff *hb;
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struct sk_buff *iovb;
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struct sk_buff *lb;
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struct sk_buff *sb;
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i = card->index;
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if (cards[i] == NULL)
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return;
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if (card->atmdev->phy && card->atmdev->phy->stop)
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card->atmdev->phy->stop(card->atmdev);
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/* Stop everything */
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writel(0x00000000, card->membase + CFG);
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/* De-register device */
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atm_dev_deregister(card->atmdev);
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/* Disable PCI device */
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pci_disable_device(pcidev);
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/* Free up resources */
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j = 0;
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PRINTK("nicstar%d: freeing %d huge buffers.\n", i, card->hbpool.count);
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while ((hb = skb_dequeue(&card->hbpool.queue)) != NULL) {
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dev_kfree_skb_any(hb);
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j++;
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}
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PRINTK("nicstar%d: %d huge buffers freed.\n", i, j);
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j = 0;
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PRINTK("nicstar%d: freeing %d iovec buffers.\n", i,
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card->iovpool.count);
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while ((iovb = skb_dequeue(&card->iovpool.queue)) != NULL) {
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dev_kfree_skb_any(iovb);
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j++;
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}
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PRINTK("nicstar%d: %d iovec buffers freed.\n", i, j);
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while ((lb = skb_dequeue(&card->lbpool.queue)) != NULL)
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dev_kfree_skb_any(lb);
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while ((sb = skb_dequeue(&card->sbpool.queue)) != NULL)
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dev_kfree_skb_any(sb);
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free_scq(card, card->scq0, NULL);
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for (j = 0; j < NS_FRSCD_NUM; j++) {
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if (card->scd2vc[j] != NULL)
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free_scq(card, card->scd2vc[j]->scq, card->scd2vc[j]->tx_vcc);
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}
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idr_remove_all(&card->idr);
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idr_destroy(&card->idr);
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pci_free_consistent(card->pcidev, NS_RSQSIZE + NS_RSQ_ALIGNMENT,
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card->rsq.org, card->rsq.dma);
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pci_free_consistent(card->pcidev, NS_TSQSIZE + NS_TSQ_ALIGNMENT,
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card->tsq.org, card->tsq.dma);
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free_irq(card->pcidev->irq, card);
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iounmap(card->membase);
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kfree(card);
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}
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static struct pci_device_id nicstar_pci_tbl[] __devinitdata = {
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{ PCI_VDEVICE(IDT, PCI_DEVICE_ID_IDT_IDT77201), 0 },
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{0,} /* terminate list */
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};
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MODULE_DEVICE_TABLE(pci, nicstar_pci_tbl);
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static struct pci_driver nicstar_driver = {
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.name = "nicstar",
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.id_table = nicstar_pci_tbl,
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.probe = nicstar_init_one,
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.remove = __devexit_p(nicstar_remove_one),
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};
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static int __init nicstar_init(void)
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{
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unsigned error = 0; /* Initialized to remove compile warning */
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XPRINTK("nicstar: nicstar_init() called.\n");
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error = pci_register_driver(&nicstar_driver);
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TXPRINTK("nicstar: TX debug enabled.\n");
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RXPRINTK("nicstar: RX debug enabled.\n");
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PRINTK("nicstar: General debug enabled.\n");
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#ifdef PHY_LOOPBACK
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printk("nicstar: using PHY loopback.\n");
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#endif /* PHY_LOOPBACK */
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XPRINTK("nicstar: nicstar_init() returned.\n");
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if (!error) {
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init_timer(&ns_timer);
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ns_timer.expires = jiffies + NS_POLL_PERIOD;
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ns_timer.data = 0UL;
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ns_timer.function = ns_poll;
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add_timer(&ns_timer);
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}
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return error;
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}
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static void __exit nicstar_cleanup(void)
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{
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XPRINTK("nicstar: nicstar_cleanup() called.\n");
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del_timer(&ns_timer);
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pci_unregister_driver(&nicstar_driver);
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XPRINTK("nicstar: nicstar_cleanup() returned.\n");
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}
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static u32 ns_read_sram(ns_dev * card, u32 sram_address)
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{
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unsigned long flags;
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u32 data;
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sram_address <<= 2;
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sram_address &= 0x0007FFFC; /* address must be dword aligned */
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sram_address |= 0x50000000; /* SRAM read command */
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spin_lock_irqsave(&card->res_lock, flags);
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while (CMD_BUSY(card)) ;
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writel(sram_address, card->membase + CMD);
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while (CMD_BUSY(card)) ;
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data = readl(card->membase + DR0);
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spin_unlock_irqrestore(&card->res_lock, flags);
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return data;
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}
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static void ns_write_sram(ns_dev * card, u32 sram_address, u32 * value,
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int count)
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{
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unsigned long flags;
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int i, c;
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count--; /* count range now is 0..3 instead of 1..4 */
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c = count;
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c <<= 2; /* to use increments of 4 */
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spin_lock_irqsave(&card->res_lock, flags);
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while (CMD_BUSY(card)) ;
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for (i = 0; i <= c; i += 4)
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writel(*(value++), card->membase + i);
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/* Note: DR# registers are the first 4 dwords in nicstar's memspace,
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so card->membase + DR0 == card->membase */
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sram_address <<= 2;
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sram_address &= 0x0007FFFC;
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sram_address |= (0x40000000 | count);
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writel(sram_address, card->membase + CMD);
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spin_unlock_irqrestore(&card->res_lock, flags);
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}
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static int __devinit ns_init_card(int i, struct pci_dev *pcidev)
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{
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int j;
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struct ns_dev *card = NULL;
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unsigned char pci_latency;
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unsigned error;
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u32 data;
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u32 u32d[4];
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u32 ns_cfg_rctsize;
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int bcount;
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unsigned long membase;
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error = 0;
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if (pci_enable_device(pcidev)) {
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printk("nicstar%d: can't enable PCI device\n", i);
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error = 2;
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ns_init_card_error(card, error);
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return error;
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}
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if ((pci_set_dma_mask(pcidev, DMA_BIT_MASK(32)) != 0) ||
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(pci_set_consistent_dma_mask(pcidev, DMA_BIT_MASK(32)) != 0)) {
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printk(KERN_WARNING
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"nicstar%d: No suitable DMA available.\n", i);
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error = 2;
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ns_init_card_error(card, error);
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return error;
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}
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if ((card = kmalloc(sizeof(ns_dev), GFP_KERNEL)) == NULL) {
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printk
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("nicstar%d: can't allocate memory for device structure.\n",
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i);
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error = 2;
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ns_init_card_error(card, error);
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return error;
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}
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cards[i] = card;
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spin_lock_init(&card->int_lock);
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spin_lock_init(&card->res_lock);
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pci_set_drvdata(pcidev, card);
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card->index = i;
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card->atmdev = NULL;
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card->pcidev = pcidev;
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membase = pci_resource_start(pcidev, 1);
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card->membase = ioremap(membase, NS_IOREMAP_SIZE);
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if (!card->membase) {
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printk("nicstar%d: can't ioremap() membase.\n", i);
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error = 3;
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ns_init_card_error(card, error);
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return error;
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}
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PRINTK("nicstar%d: membase at 0x%p.\n", i, card->membase);
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pci_set_master(pcidev);
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if (pci_read_config_byte(pcidev, PCI_LATENCY_TIMER, &pci_latency) != 0) {
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printk("nicstar%d: can't read PCI latency timer.\n", i);
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error = 6;
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ns_init_card_error(card, error);
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return error;
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}
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#ifdef NS_PCI_LATENCY
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if (pci_latency < NS_PCI_LATENCY) {
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PRINTK("nicstar%d: setting PCI latency timer to %d.\n", i,
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NS_PCI_LATENCY);
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for (j = 1; j < 4; j++) {
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if (pci_write_config_byte
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(pcidev, PCI_LATENCY_TIMER, NS_PCI_LATENCY) != 0)
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break;
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}
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if (j == 4) {
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printk
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("nicstar%d: can't set PCI latency timer to %d.\n",
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i, NS_PCI_LATENCY);
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error = 7;
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ns_init_card_error(card, error);
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return error;
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}
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}
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#endif /* NS_PCI_LATENCY */
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/* Clear timer overflow */
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data = readl(card->membase + STAT);
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if (data & NS_STAT_TMROF)
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writel(NS_STAT_TMROF, card->membase + STAT);
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|
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/* Software reset */
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writel(NS_CFG_SWRST, card->membase + CFG);
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NS_DELAY;
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writel(0x00000000, card->membase + CFG);
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/* PHY reset */
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writel(0x00000008, card->membase + GP);
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NS_DELAY;
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writel(0x00000001, card->membase + GP);
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NS_DELAY;
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while (CMD_BUSY(card)) ;
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writel(NS_CMD_WRITE_UTILITY | 0x00000100, card->membase + CMD); /* Sync UTOPIA with SAR clock */
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NS_DELAY;
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|
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/* Detect PHY type */
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while (CMD_BUSY(card)) ;
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writel(NS_CMD_READ_UTILITY | 0x00000200, card->membase + CMD);
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while (CMD_BUSY(card)) ;
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data = readl(card->membase + DR0);
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switch (data) {
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case 0x00000009:
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printk("nicstar%d: PHY seems to be 25 Mbps.\n", i);
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card->max_pcr = ATM_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 */
|
|
break;
|
|
case 0x00000030:
|
|
case 0x00000031:
|
|
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 */
|
|
break;
|
|
default:
|
|
printk("nicstar%d: unknown PHY type (0x%08X).\n", i, data);
|
|
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;
|
|
|
|
/* Initialize the nicstar eeprom/eprom stuff, for the MAC addr */
|
|
if (mac[i] == NULL)
|
|
nicstar_init_eprom(card->membase);
|
|
|
|
/* Set the VPI/VCI MSb mask to zero so we can receive OAM cells */
|
|
writel(0x00000000, card->membase + VPM);
|
|
|
|
/* Initialize TSQ */
|
|
card->tsq.org = pci_alloc_consistent(card->pcidev,
|
|
NS_TSQSIZE + NS_TSQ_ALIGNMENT,
|
|
&card->tsq.dma);
|
|
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 = PTR_ALIGN(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(ALIGN(card->tsq.dma, NS_TSQ_ALIGNMENT), card->membase + TSQB);
|
|
PRINTK("nicstar%d: TSQ base at 0x%p.\n", i, card->tsq.base);
|
|
|
|
/* Initialize RSQ */
|
|
card->rsq.org = pci_alloc_consistent(card->pcidev,
|
|
NS_RSQSIZE + NS_RSQ_ALIGNMENT,
|
|
&card->rsq.dma);
|
|
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 = PTR_ALIGN(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(ALIGN(card->rsq.dma, NS_RSQ_ALIGNMENT), card->membase + RSQB);
|
|
PRINTK("nicstar%d: RSQ base at 0x%p.\n", i, card->rsq.base);
|
|
|
|
/* Initialize SCQ0, the only VBR SCQ used */
|
|
card->scq1 = NULL;
|
|
card->scq2 = NULL;
|
|
card->scq0 = get_scq(card, VBR_SCQSIZE, NS_VRSCD0);
|
|
if (card->scq0 == NULL) {
|
|
printk("nicstar%d: can't get SCQ0.\n", i);
|
|
error = 12;
|
|
ns_init_card_error(card, error);
|
|
return error;
|
|
}
|
|
u32d[0] = scq_virt_to_bus(card->scq0, 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%p.\n", i, 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 */
|
|
|
|
idr_init(&card->idr);
|
|
|
|
/* 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 = __dev_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 = 13;
|
|
ns_init_card_error(card, error);
|
|
return error;
|
|
}
|
|
NS_PRV_BUFTYPE(hb) = BUF_NONE;
|
|
skb_queue_tail(&card->hbpool.queue, hb);
|
|
card->hbpool.count++;
|
|
}
|
|
|
|
/* 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 = __dev_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;
|
|
}
|
|
NS_PRV_BUFTYPE(lb) = BUF_LG;
|
|
skb_queue_tail(&card->lbpool.queue, lb);
|
|
skb_reserve(lb, NS_SMBUFSIZE);
|
|
push_rxbufs(card, lb);
|
|
/* Due to the implementation of push_rxbufs() this is 1, not 0 */
|
|
if (j == 1) {
|
|
card->rcbuf = lb;
|
|
card->rawcell = (struct ns_rcqe *) lb->data;
|
|
card->rawch = NS_PRV_DMA(lb);
|
|
}
|
|
}
|
|
/* 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 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 = __dev_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 = 15;
|
|
ns_init_card_error(card, error);
|
|
return error;
|
|
}
|
|
NS_PRV_BUFTYPE(sb) = BUF_SM;
|
|
skb_queue_tail(&card->sbpool.queue, sb);
|
|
skb_reserve(sb, NS_AAL0_HEADER);
|
|
push_rxbufs(card, sb);
|
|
}
|
|
/* 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 = 15;
|
|
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 = 16;
|
|
ns_init_card_error(card, error);
|
|
return error;
|
|
}
|
|
NS_PRV_BUFTYPE(iovb) = BUF_NONE;
|
|
skb_queue_tail(&card->iovpool.queue, iovb);
|
|
card->iovpool.count++;
|
|
}
|
|
|
|
/* 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;
|
|
|
|
card->intcnt = 0;
|
|
if (request_irq
|
|
(pcidev->irq, &ns_irq_handler, IRQF_SHARED, "nicstar", card) != 0) {
|
|
printk("nicstar%d: can't allocate IRQ %d.\n", i, pcidev->irq);
|
|
error = 9;
|
|
ns_init_card_error(card, error);
|
|
return error;
|
|
}
|
|
|
|
/* Register device */
|
|
card->atmdev = atm_dev_register("nicstar", &card->pcidev->dev, &atm_ops,
|
|
-1, NULL);
|
|
if (card->atmdev == NULL) {
|
|
printk("nicstar%d: can't register device.\n", i);
|
|
error = 17;
|
|
ns_init_card_error(card, error);
|
|
return error;
|
|
}
|
|
|
|
if (ns_parse_mac(mac[i], card->atmdev->esi)) {
|
|
nicstar_read_eprom(card->membase, NICSTAR_EPROM_MAC_ADDR_OFFSET,
|
|
card->atmdev->esi, 6);
|
|
if (memcmp(card->atmdev->esi, "\x00\x00\x00\x00\x00\x00", 6) ==
|
|
0) {
|
|
nicstar_read_eprom(card->membase,
|
|
NICSTAR_EPROM_MAC_ADDR_OFFSET_ALT,
|
|
card->atmdev->esi, 6);
|
|
}
|
|
}
|
|
|
|
printk("nicstar%d: MAC address %pM\n", i, card->atmdev->esi);
|
|
|
|
card->atmdev->dev_data = card;
|
|
card->atmdev->ci_range.vpi_bits = card->vpibits;
|
|
card->atmdev->ci_range.vci_bits = card->vcibits;
|
|
card->atmdev->link_rate = card->max_pcr;
|
|
card->atmdev->phy = NULL;
|
|
|
|
#ifdef CONFIG_ATM_NICSTAR_USE_SUNI
|
|
if (card->max_pcr == ATM_OC3_PCR)
|
|
suni_init(card->atmdev);
|
|
#endif /* CONFIG_ATM_NICSTAR_USE_SUNI */
|
|
|
|
#ifdef CONFIG_ATM_NICSTAR_USE_IDT77105
|
|
if (card->max_pcr == ATM_25_PCR)
|
|
idt77105_init(card->atmdev);
|
|
#endif /* CONFIG_ATM_NICSTAR_USE_IDT77105 */
|
|
|
|
if (card->atmdev->phy && card->atmdev->phy->start)
|
|
card->atmdev->phy->start(card->atmdev);
|
|
|
|
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 */
|
|
NS_CFG_PHYIE, card->membase + CFG);
|
|
|
|
num_cards++;
|
|
|
|
return error;
|
|
}
|
|
|
|
static void __devinit ns_init_card_error(ns_dev * card, int error)
|
|
{
|
|
if (error >= 17) {
|
|
writel(0x00000000, card->membase + CFG);
|
|
}
|
|
if (error >= 16) {
|
|
struct sk_buff *iovb;
|
|
while ((iovb = skb_dequeue(&card->iovpool.queue)) != NULL)
|
|
dev_kfree_skb_any(iovb);
|
|
}
|
|
if (error >= 15) {
|
|
struct sk_buff *sb;
|
|
while ((sb = skb_dequeue(&card->sbpool.queue)) != NULL)
|
|
dev_kfree_skb_any(sb);
|
|
free_scq(card, card->scq0, NULL);
|
|
}
|
|
if (error >= 14) {
|
|
struct sk_buff *lb;
|
|
while ((lb = skb_dequeue(&card->lbpool.queue)) != NULL)
|
|
dev_kfree_skb_any(lb);
|
|
}
|
|
if (error >= 13) {
|
|
struct sk_buff *hb;
|
|
while ((hb = skb_dequeue(&card->hbpool.queue)) != NULL)
|
|
dev_kfree_skb_any(hb);
|
|
}
|
|
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(card->membase);
|
|
}
|
|
if (error >= 3) {
|
|
pci_disable_device(card->pcidev);
|
|
kfree(card);
|
|
}
|
|
}
|
|
|
|
static scq_info *get_scq(ns_dev *card, int size, u32 scd)
|
|
{
|
|
scq_info *scq;
|
|
int i;
|
|
|
|
if (size != VBR_SCQSIZE && size != CBR_SCQSIZE)
|
|
return NULL;
|
|
|
|
scq = kmalloc(sizeof(scq_info), GFP_KERNEL);
|
|
if (!scq)
|
|
return NULL;
|
|
scq->org = pci_alloc_consistent(card->pcidev, 2 * size, &scq->dma);
|
|
if (!scq->org) {
|
|
kfree(scq);
|
|
return NULL;
|
|
}
|
|
scq->skb = kmalloc(sizeof(struct sk_buff *) *
|
|
(size / NS_SCQE_SIZE), GFP_KERNEL);
|
|
if (!scq->skb) {
|
|
kfree(scq->org);
|
|
kfree(scq);
|
|
return NULL;
|
|
}
|
|
scq->num_entries = size / NS_SCQE_SIZE;
|
|
scq->base = PTR_ALIGN(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;
|
|
init_waitqueue_head(&scq->scqfull_waitq);
|
|
scq->full = 0;
|
|
spin_lock_init(&scq->lock);
|
|
|
|
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(ns_dev *card, 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 = ATM_SKB(scq->skb[i])->vcc;
|
|
if (vcc->pop != NULL)
|
|
vcc->pop(vcc, scq->skb[i]);
|
|
else
|
|
dev_kfree_skb_any(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_any(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_any(scq->skb[i]);
|
|
}
|
|
}
|
|
}
|
|
kfree(scq->skb);
|
|
pci_free_consistent(card->pcidev,
|
|
2 * (scq->num_entries == VBR_SCQ_NUM_ENTRIES ?
|
|
VBR_SCQSIZE : CBR_SCQSIZE),
|
|
scq->org, scq->dma);
|
|
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, struct sk_buff *skb)
|
|
{
|
|
struct sk_buff *handle1, *handle2;
|
|
u32 id1 = 0, id2 = 0;
|
|
u32 addr1, addr2;
|
|
u32 stat;
|
|
unsigned long flags;
|
|
int err;
|
|
|
|
/* *BARF* */
|
|
handle2 = NULL;
|
|
addr2 = 0;
|
|
handle1 = skb;
|
|
addr1 = pci_map_single(card->pcidev,
|
|
skb->data,
|
|
(NS_PRV_BUFTYPE(skb) == BUF_SM
|
|
? NS_SMSKBSIZE : NS_LGSKBSIZE),
|
|
PCI_DMA_TODEVICE);
|
|
NS_PRV_DMA(skb) = addr1; /* save so we can unmap later */
|
|
|
|
#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 (NS_PRV_BUFTYPE(skb) == 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 { /* buf_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 (NS_PRV_BUFTYPE(skb) == BUF_SM) {
|
|
if (card->sbfqc >= card->sbnr.max) {
|
|
skb_unlink(handle1, &card->sbpool.queue);
|
|
dev_kfree_skb_any(handle1);
|
|
skb_unlink(handle2, &card->sbpool.queue);
|
|
dev_kfree_skb_any(handle2);
|
|
return;
|
|
} else
|
|
card->sbfqc += 2;
|
|
} else { /* (buf_type == BUF_LG) */
|
|
|
|
if (card->lbfqc >= card->lbnr.max) {
|
|
skb_unlink(handle1, &card->lbpool.queue);
|
|
dev_kfree_skb_any(handle1);
|
|
skb_unlink(handle2, &card->lbpool.queue);
|
|
dev_kfree_skb_any(handle2);
|
|
return;
|
|
} else
|
|
card->lbfqc += 2;
|
|
}
|
|
|
|
do {
|
|
if (!idr_pre_get(&card->idr, GFP_ATOMIC)) {
|
|
printk(KERN_ERR
|
|
"nicstar%d: no free memory for idr\n",
|
|
card->index);
|
|
goto out;
|
|
}
|
|
|
|
if (!id1)
|
|
err = idr_get_new_above(&card->idr, handle1, 0, &id1);
|
|
|
|
if (!id2 && err == 0)
|
|
err = idr_get_new_above(&card->idr, handle2, 0, &id2);
|
|
|
|
} while (err == -EAGAIN);
|
|
|
|
if (err)
|
|
goto out;
|
|
|
|
spin_lock_irqsave(&card->res_lock, flags);
|
|
while (CMD_BUSY(card)) ;
|
|
writel(addr2, card->membase + DR3);
|
|
writel(id2, card->membase + DR2);
|
|
writel(addr1, card->membase + DR1);
|
|
writel(id1, card->membase + DR0);
|
|
writel(NS_CMD_WRITE_FREEBUFQ | NS_PRV_BUFTYPE(skb),
|
|
card->membase + CMD);
|
|
spin_unlock_irqrestore(&card->res_lock, flags);
|
|
|
|
XPRINTK("nicstar%d: Pushing %s buffers at 0x%x and 0x%x.\n",
|
|
card->index,
|
|
(NS_PRV_BUFTYPE(skb) == 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);
|
|
}
|
|
|
|
out:
|
|
return;
|
|
}
|
|
|
|
static irqreturn_t ns_irq_handler(int irq, void *dev_id)
|
|
{
|
|
u32 stat_r;
|
|
ns_dev *card;
|
|
struct atm_dev *dev;
|
|
unsigned long flags;
|
|
|
|
card = (ns_dev *) dev_id;
|
|
dev = card->atmdev;
|
|
card->intcnt++;
|
|
|
|
PRINTK("nicstar%d: NICStAR generated an interrupt\n", card->index);
|
|
|
|
spin_lock_irqsave(&card->int_lock, flags);
|
|
|
|
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);
|
|
if (dev->phy && dev->phy->interrupt) {
|
|
dev->phy->interrupt(dev);
|
|
}
|
|
}
|
|
|
|
/* 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 until 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) {
|
|
|
|
if (ns_rcqe_islast(card->rawcell)) {
|
|
struct sk_buff *oldbuf;
|
|
|
|
oldbuf = card->rcbuf;
|
|
card->rcbuf = idr_find(&card->idr,
|
|
ns_rcqe_nextbufhandle(card->rawcell));
|
|
card->rawch = NS_PRV_DMA(card->rcbuf);
|
|
card->rawcell = (struct ns_rcqe *)
|
|
card->rcbuf->data;
|
|
recycle_rx_buf(card, oldbuf);
|
|
} else {
|
|
card->rawch += NS_RCQE_SIZE;
|
|
card->rawcell++;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* 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 = dev_alloc_skb(NS_SMSKBSIZE);
|
|
if (sb == NULL) {
|
|
writel(readl(card->membase + CFG) &
|
|
~NS_CFG_EFBIE, card->membase + CFG);
|
|
card->efbie = 0;
|
|
break;
|
|
}
|
|
NS_PRV_BUFTYPE(sb) = BUF_SM;
|
|
skb_queue_tail(&card->sbpool.queue, sb);
|
|
skb_reserve(sb, NS_AAL0_HEADER);
|
|
push_rxbufs(card, sb);
|
|
}
|
|
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 = dev_alloc_skb(NS_LGSKBSIZE);
|
|
if (lb == NULL) {
|
|
writel(readl(card->membase + CFG) &
|
|
~NS_CFG_EFBIE, card->membase + CFG);
|
|
card->efbie = 0;
|
|
break;
|
|
}
|
|
NS_PRV_BUFTYPE(lb) = BUF_LG;
|
|
skb_queue_tail(&card->lbpool.queue, lb);
|
|
skb_reserve(lb, NS_SMBUFSIZE);
|
|
push_rxbufs(card, lb);
|
|
}
|
|
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);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&card->int_lock, flags);
|
|
PRINTK("nicstar%d: end of interrupt service\n", card->index);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int ns_open(struct atm_vcc *vcc)
|
|
{
|
|
ns_dev *card;
|
|
vc_map *vc;
|
|
unsigned long tmpl, modl;
|
|
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 */
|
|
short vpi = vcc->vpi;
|
|
int vci = vcc->vci;
|
|
|
|
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;
|
|
}
|
|
|
|
vc = &(card->vcmap[vpi << card->vcibits | 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;
|
|
}
|
|
|
|
set_bit(ATM_VF_ADDR, &vcc->flags);
|
|
|
|
/* 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 (!test_bit(ATM_VF_PARTIAL, &vcc->flags)) {
|
|
scq_info *scq;
|
|
|
|
set_bit(ATM_VF_PARTIAL, &vcc->flags);
|
|
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);
|
|
clear_bit(ATM_VF_PARTIAL, &vcc->flags);
|
|
clear_bit(ATM_VF_ADDR, &vcc->flags);
|
|
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);
|
|
|
|
tmpl =
|
|
(unsigned long)tcra *(unsigned long)
|
|
NS_TST_NUM_ENTRIES;
|
|
modl = tmpl % card->max_pcr;
|
|
|
|
n = (int)(tmpl / card->max_pcr);
|
|
if (tcr > 0) {
|
|
if (modl > 0)
|
|
n++;
|
|
} else if (tcr == 0) {
|
|
if ((n =
|
|
(card->tst_free_entries -
|
|
NS_TST_RESERVED)) <= 0) {
|
|
PRINTK
|
|
("nicstar%d: no CBR bandwidth free.\n",
|
|
card->index);
|
|
clear_bit(ATM_VF_PARTIAL, &vcc->flags);
|
|
clear_bit(ATM_VF_ADDR, &vcc->flags);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
if (n == 0) {
|
|
printk
|
|
("nicstar%d: selected bandwidth < granularity.\n",
|
|
card->index);
|
|
clear_bit(ATM_VF_PARTIAL, &vcc->flags);
|
|
clear_bit(ATM_VF_ADDR, &vcc->flags);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (n > (card->tst_free_entries - NS_TST_RESERVED)) {
|
|
PRINTK
|
|
("nicstar%d: not enough free CBR bandwidth.\n",
|
|
card->index);
|
|
clear_bit(ATM_VF_PARTIAL, &vcc->flags);
|
|
clear_bit(ATM_VF_ADDR, &vcc->flags);
|
|
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;
|
|
clear_bit(ATM_VF_PARTIAL, &vcc->flags);
|
|
clear_bit(ATM_VF_ADDR, &vcc->flags);
|
|
return -EBUSY;
|
|
}
|
|
|
|
vc->cbr_scd = NS_FRSCD + frscdi * NS_FRSCD_SIZE;
|
|
|
|
scq = get_scq(card, CBR_SCQSIZE, vc->cbr_scd);
|
|
if (scq == NULL) {
|
|
PRINTK("nicstar%d: can't get fixed rate SCQ.\n",
|
|
card->index);
|
|
card->scd2vc[frscdi] = NULL;
|
|
card->tst_free_entries += n;
|
|
clear_bit(ATM_VF_PARTIAL, &vcc->flags);
|
|
clear_bit(ATM_VF_ADDR, &vcc->flags);
|
|
return -ENOMEM;
|
|
}
|
|
vc->scq = scq;
|
|
u32d[0] = scq_virt_to_bus(scq, 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 if (vcc->qos.txtp.traffic_class == ATM_UBR) {
|
|
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);
|
|
}
|
|
|
|
}
|
|
|
|
set_bit(ATM_VF_READY, &vcc->flags);
|
|
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);
|
|
|
|
clear_bit(ATM_VF_READY, &vcc->flags);
|
|
|
|
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;
|
|
spin_lock_irqsave(&card->res_lock, flags);
|
|
while (CMD_BUSY(card)) ;
|
|
writel(NS_CMD_CLOSE_CONNECTION | addr << 2,
|
|
card->membase + CMD);
|
|
spin_unlock_irqrestore(&card->res_lock, 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,
|
|
NS_PRV_IOVCNT(iovb));
|
|
NS_PRV_IOVCNT(iovb) = 0;
|
|
spin_lock_irqsave(&card->int_lock, flags);
|
|
recycle_iov_buf(card, iovb);
|
|
spin_unlock_irqrestore(&card->int_lock, 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 (;;) {
|
|
spin_lock_irqsave(&scq->lock, flags);
|
|
scqep = scq->next;
|
|
if (scqep == scq->base)
|
|
scqep = scq->last;
|
|
else
|
|
scqep--;
|
|
if (scqep == scq->tail) {
|
|
spin_unlock_irqrestore(&scq->lock, 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 = scq_virt_to_bus(scq, scq->next);
|
|
ns_write_sram(card, scq->scd, &data, 1);
|
|
}
|
|
spin_unlock_irqrestore(&scq->lock, flags);
|
|
schedule();
|
|
}
|
|
|
|
/* 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(card, vc->scq, vcc);
|
|
}
|
|
|
|
/* remove all references to vcc before deleting it */
|
|
if (vcc->qos.txtp.traffic_class != ATM_NONE) {
|
|
unsigned long flags;
|
|
scq_info *scq = card->scq0;
|
|
|
|
spin_lock_irqsave(&scq->lock, flags);
|
|
|
|
for (i = 0; i < scq->num_entries; i++) {
|
|
if (scq->skb[i] && ATM_SKB(scq->skb[i])->vcc == vcc) {
|
|
ATM_SKB(scq->skb[i])->vcc = NULL;
|
|
atm_return(vcc, scq->skb[i]->truesize);
|
|
PRINTK
|
|
("nicstar: deleted pending vcc mapping\n");
|
|
}
|
|
}
|
|
|
|
spin_unlock_irqrestore(&scq->lock, flags);
|
|
}
|
|
|
|
vcc->dev_data = NULL;
|
|
clear_bit(ATM_VF_PARTIAL, &vcc->flags);
|
|
clear_bit(ATM_VF_ADDR, &vcc->flags);
|
|
|
|
#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%p next = 0x%p last = 0x%p TSQT = 0x%08X \n",
|
|
card->tsq.base, card->tsq.next,
|
|
card->tsq.last, readl(card->membase + TSQT));
|
|
printk
|
|
("RSQ: base = 0x%p next = 0x%p last = 0x%p RSQT = 0x%08X \n",
|
|
card->rsq.base, card->rsq.next,
|
|
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;
|
|
unsigned long cl;
|
|
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);
|
|
return;
|
|
}
|
|
|
|
r = n;
|
|
cl = NS_TST_NUM_ENTRIES;
|
|
data = ns_tste_make(NS_TST_OPCODE_FIXED, vc->cbr_scd);
|
|
|
|
while (r > 0) {
|
|
if (cl >= NS_TST_NUM_ENTRIES && card->tste2vc[e] == NULL) {
|
|
card->tste2vc[e] = vc;
|
|
ns_write_sram(card, new_tst + e, &data, 1);
|
|
cl -= NS_TST_NUM_ENTRIES;
|
|
r--;
|
|
}
|
|
|
|
if (++e == NS_TST_NUM_ENTRIES) {
|
|
e = 0;
|
|
}
|
|
cl += n;
|
|
}
|
|
|
|
/* 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);
|
|
atomic_inc(&vcc->stats->tx_err);
|
|
dev_kfree_skb_any(skb);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!vc->tx) {
|
|
printk("nicstar%d: Trying to transmit on a non-tx VC.\n",
|
|
card->index);
|
|
atomic_inc(&vcc->stats->tx_err);
|
|
dev_kfree_skb_any(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);
|
|
atomic_inc(&vcc->stats->tx_err);
|
|
dev_kfree_skb_any(skb);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (skb_shinfo(skb)->nr_frags != 0) {
|
|
printk("nicstar%d: No scatter-gather yet.\n", card->index);
|
|
atomic_inc(&vcc->stats->tx_err);
|
|
dev_kfree_skb_any(skb);
|
|
return -EINVAL;
|
|
}
|
|
|
|
ATM_SKB(skb)->vcc = vcc;
|
|
|
|
NS_PRV_DMA(skb) = pci_map_single(card->pcidev, skb->data,
|
|
skb->len, PCI_DMA_TODEVICE);
|
|
|
|
if (vcc->qos.aal == ATM_AAL5) {
|
|
buflen = (skb->len + 47 + 8) / 48 * 48; /* Multiple of 48 */
|
|
flags = NS_TBD_AAL5;
|
|
scqe.word_2 = cpu_to_le32(NS_PRV_DMA(skb));
|
|
scqe.word_3 = cpu_to_le32(skb->len);
|
|
scqe.word_4 =
|
|
ns_tbd_mkword_4(0, (u32) vcc->vpi, (u32) vcc->vci, 0,
|
|
ATM_SKB(skb)->
|
|
atm_options & ATM_ATMOPT_CLP ? 1 : 0);
|
|
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 = cpu_to_le32(NS_PRV_DMA(skb) + NS_AAL0_HEADER);
|
|
scqe.word_3 = cpu_to_le32(0x00000000);
|
|
if (*skb->data & 0x02) /* Payload type 1 - end of pdu */
|
|
flags |= NS_TBD_EOPDU;
|
|
scqe.word_4 =
|
|
cpu_to_le32(*((u32 *) skb->data) & ~NS_TBD_VC_MASK);
|
|
/* Force the VPI/VCI to be the same as in VCC struct */
|
|
scqe.word_4 |=
|
|
cpu_to_le32((((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) {
|
|
atomic_inc(&vcc->stats->tx_err);
|
|
dev_kfree_skb_any(skb);
|
|
return -EIO;
|
|
}
|
|
atomic_inc(&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;
|
|
|
|
spin_lock_irqsave(&scq->lock, flags);
|
|
while (scq->tail == scq->next) {
|
|
if (in_interrupt()) {
|
|
spin_unlock_irqrestore(&scq->lock, flags);
|
|
printk("nicstar%d: Error pushing TBD.\n", card->index);
|
|
return 1;
|
|
}
|
|
|
|
scq->full = 1;
|
|
spin_unlock_irqrestore(&scq->lock, flags);
|
|
interruptible_sleep_on_timeout(&scq->scqfull_waitq,
|
|
SCQFULL_TIMEOUT);
|
|
spin_lock_irqsave(&scq->lock, flags);
|
|
|
|
if (scq->full) {
|
|
spin_unlock_irqrestore(&scq->lock, flags);
|
|
printk("nicstar%d: Timeout pushing TBD.\n",
|
|
card->index);
|
|
return 1;
|
|
}
|
|
}
|
|
*scq->next = *tbd;
|
|
index = (int)(scq->next - scq->base);
|
|
scq->skb[index] = skb;
|
|
XPRINTK("nicstar%d: sending skb at 0x%p (pos %d).\n",
|
|
card->index, skb, index);
|
|
XPRINTK("nicstar%d: TBD written:\n0x%x\n0x%x\n0x%x\n0x%x\n at 0x%p.\n",
|
|
card->index, le32_to_cpu(tbd->word_1), le32_to_cpu(tbd->word_2),
|
|
le32_to_cpu(tbd->word_3), le32_to_cpu(tbd->word_4),
|
|
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) {
|
|
int has_run = 0;
|
|
|
|
while (scq->tail == scq->next) {
|
|
if (in_interrupt()) {
|
|
data = scq_virt_to_bus(scq, scq->next);
|
|
ns_write_sram(card, scq->scd, &data, 1);
|
|
spin_unlock_irqrestore(&scq->lock, flags);
|
|
printk("nicstar%d: Error pushing TSR.\n",
|
|
card->index);
|
|
return 0;
|
|
}
|
|
|
|
scq->full = 1;
|
|
if (has_run++)
|
|
break;
|
|
spin_unlock_irqrestore(&scq->lock, flags);
|
|
interruptible_sleep_on_timeout(&scq->scqfull_waitq,
|
|
SCQFULL_TIMEOUT);
|
|
spin_lock_irqsave(&scq->lock, 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%p.\n",
|
|
card->index, le32_to_cpu(tsr.word_1),
|
|
le32_to_cpu(tsr.word_2), le32_to_cpu(tsr.word_3),
|
|
le32_to_cpu(tsr.word_4), 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: Timeout pushing TSR.\n",
|
|
card->index);
|
|
}
|
|
data = scq_virt_to_bus(scq, scq->next);
|
|
ns_write_sram(card, scq->scd, &data, 1);
|
|
|
|
spin_unlock_irqrestore(&scq->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void process_tsq(ns_dev * card)
|
|
{
|
|
u32 scdi;
|
|
scq_info *scq;
|
|
ns_tsi *previous = NULL, *one_ahead, *two_ahead;
|
|
int serviced_entries; /* flag indicating at least on entry was serviced */
|
|
|
|
serviced_entries = 0;
|
|
|
|
if (card->tsq.next == card->tsq.last)
|
|
one_ahead = card->tsq.base;
|
|
else
|
|
one_ahead = card->tsq.next + 1;
|
|
|
|
if (one_ahead == card->tsq.last)
|
|
two_ahead = card->tsq.base;
|
|
else
|
|
two_ahead = one_ahead + 1;
|
|
|
|
while (!ns_tsi_isempty(card->tsq.next) || !ns_tsi_isempty(one_ahead) ||
|
|
!ns_tsi_isempty(two_ahead))
|
|
/* At most two empty, as stated in the 77201 errata */
|
|
{
|
|
serviced_entries = 1;
|
|
|
|
/* Skip the one or two possible empty entries */
|
|
while (ns_tsi_isempty(card->tsq.next)) {
|
|
if (card->tsq.next == card->tsq.last)
|
|
card->tsq.next = card->tsq.base;
|
|
else
|
|
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++;
|
|
|
|
if (card->tsq.next == card->tsq.last)
|
|
one_ahead = card->tsq.base;
|
|
else
|
|
one_ahead = card->tsq.next + 1;
|
|
|
|
if (one_ahead == card->tsq.last)
|
|
two_ahead = card->tsq.base;
|
|
else
|
|
two_ahead = one_ahead + 1;
|
|
}
|
|
|
|
if (serviced_entries)
|
|
writel(PTR_DIFF(previous, 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;
|
|
unsigned long flags;
|
|
|
|
XPRINTK("nicstar%d: drain_scq() called, scq at 0x%p, pos %d.\n",
|
|
card->index, scq, pos);
|
|
if (pos >= scq->num_entries) {
|
|
printk("nicstar%d: Bad index on drain_scq().\n", card->index);
|
|
return;
|
|
}
|
|
|
|
spin_lock_irqsave(&scq->lock, flags);
|
|
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%p (index %d).\n",
|
|
card->index, skb, i);
|
|
if (skb != NULL) {
|
|
pci_unmap_single(card->pcidev,
|
|
NS_PRV_DMA(skb),
|
|
skb->len,
|
|
PCI_DMA_TODEVICE);
|
|
vcc = ATM_SKB(skb)->vcc;
|
|
if (vcc && vcc->pop != NULL) {
|
|
vcc->pop(vcc, skb);
|
|
} else {
|
|
dev_kfree_skb_irq(skb);
|
|
}
|
|
scq->skb[i] = NULL;
|
|
}
|
|
if (++i == scq->num_entries)
|
|
i = 0;
|
|
}
|
|
scq->tail = scq->base + pos;
|
|
spin_unlock_irqrestore(&scq->lock, flags);
|
|
}
|
|
|
|
static void process_rsq(ns_dev * card)
|
|
{
|
|
ns_rsqe *previous;
|
|
|
|
if (!ns_rsqe_valid(card->rsq.next))
|
|
return;
|
|
do {
|
|
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++;
|
|
} while (ns_rsqe_valid(card->rsq.next));
|
|
writel(PTR_DIFF(previous, 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;
|
|
u32 id;
|
|
|
|
stat = readl(card->membase + STAT);
|
|
card->sbfqc = ns_stat_sfbqc_get(stat);
|
|
card->lbfqc = ns_stat_lfbqc_get(stat);
|
|
|
|
id = le32_to_cpu(rsqe->buffer_handle);
|
|
skb = idr_find(&card->idr, id);
|
|
if (!skb) {
|
|
RXPRINTK(KERN_ERR
|
|
"nicstar%d: idr_find() failed!\n", card->index);
|
|
return;
|
|
}
|
|
idr_remove(&card->idr, id);
|
|
pci_dma_sync_single_for_cpu(card->pcidev,
|
|
NS_PRV_DMA(skb),
|
|
(NS_PRV_BUFTYPE(skb) == BUF_SM
|
|
? NS_SMSKBSIZE : NS_LGSKBSIZE),
|
|
PCI_DMA_FROMDEVICE);
|
|
pci_unmap_single(card->pcidev,
|
|
NS_PRV_DMA(skb),
|
|
(NS_PRV_BUFTYPE(skb) == BUF_SM
|
|
? NS_SMSKBSIZE : NS_LGSKBSIZE),
|
|
PCI_DMA_FROMDEVICE);
|
|
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 = dev_alloc_skb(NS_SMSKBSIZE)) == NULL) {
|
|
printk
|
|
("nicstar%d: Can't allocate buffers for aal0.\n",
|
|
card->index);
|
|
atomic_add(i, &vcc->stats->rx_drop);
|
|
break;
|
|
}
|
|
if (!atm_charge(vcc, sb->truesize)) {
|
|
RXPRINTK
|
|
("nicstar%d: atm_charge() dropped aal0 packets.\n",
|
|
card->index);
|
|
atomic_add(i - 1, &vcc->stats->rx_drop); /* already increased by 1 */
|
|
dev_kfree_skb_any(sb);
|
|
break;
|
|
}
|
|
/* Rebuild the header */
|
|
*((u32 *) sb->data) = le32_to_cpu(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(skb_tail_pointer(sb), cell, ATM_CELL_PAYLOAD);
|
|
skb_put(sb, ATM_CELL_PAYLOAD);
|
|
ATM_SKB(sb)->vcc = vcc;
|
|
__net_timestamp(sb);
|
|
vcc->push(vcc, sb);
|
|
atomic_inc(&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);
|
|
atomic_inc(&vcc->stats->rx_drop);
|
|
recycle_rx_buf(card, skb);
|
|
return;
|
|
}
|
|
NS_PRV_BUFTYPE(iovb) = BUF_NONE;
|
|
} else if (--card->iovpool.count < card->iovnr.min) {
|
|
struct sk_buff *new_iovb;
|
|
if ((new_iovb =
|
|
alloc_skb(NS_IOVBUFSIZE, GFP_ATOMIC)) != NULL) {
|
|
NS_PRV_BUFTYPE(iovb) = BUF_NONE;
|
|
skb_queue_tail(&card->iovpool.queue, new_iovb);
|
|
card->iovpool.count++;
|
|
}
|
|
}
|
|
vc->rx_iov = iovb;
|
|
NS_PRV_IOVCNT(iovb) = 0;
|
|
iovb->len = 0;
|
|
iovb->data = iovb->head;
|
|
skb_reset_tail_pointer(iovb);
|
|
/* 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 (NS_PRV_IOVCNT(iovb) >= NS_MAX_IOVECS) {
|
|
printk("nicstar%d: received too big AAL5 SDU.\n", card->index);
|
|
atomic_inc(&vcc->stats->rx_err);
|
|
recycle_iovec_rx_bufs(card, (struct iovec *)iovb->data,
|
|
NS_MAX_IOVECS);
|
|
NS_PRV_IOVCNT(iovb) = 0;
|
|
iovb->len = 0;
|
|
iovb->data = iovb->head;
|
|
skb_reset_tail_pointer(iovb);
|
|
}
|
|
iov = &((struct iovec *)iovb->data)[NS_PRV_IOVCNT(iovb)++];
|
|
iov->iov_base = (void *)skb;
|
|
iov->iov_len = ns_rsqe_cellcount(rsqe) * 48;
|
|
iovb->len += iov->iov_len;
|
|
|
|
#ifdef EXTRA_DEBUG
|
|
if (NS_PRV_IOVCNT(iovb) == 1) {
|
|
if (NS_PRV_BUFTYPE(skb) != BUF_SM) {
|
|
printk
|
|
("nicstar%d: Expected a small buffer, and this is not one.\n",
|
|
card->index);
|
|
which_list(card, skb);
|
|
atomic_inc(&vcc->stats->rx_err);
|
|
recycle_rx_buf(card, skb);
|
|
vc->rx_iov = NULL;
|
|
recycle_iov_buf(card, iovb);
|
|
return;
|
|
}
|
|
} else { /* NS_PRV_IOVCNT(iovb) >= 2 */
|
|
|
|
if (NS_PRV_BUFTYPE(skb) != BUF_LG) {
|
|
printk
|
|
("nicstar%d: Expected a large buffer, and this is not one.\n",
|
|
card->index);
|
|
which_list(card, skb);
|
|
atomic_inc(&vcc->stats->rx_err);
|
|
recycle_iovec_rx_bufs(card, (struct iovec *)iovb->data,
|
|
NS_PRV_IOVCNT(iovb));
|
|
vc->rx_iov = NULL;
|
|
recycle_iov_buf(card, iovb);
|
|
return;
|
|
}
|
|
}
|
|
#endif /* EXTRA_DEBUG */
|
|
|
|
if (ns_rsqe_eopdu(rsqe)) {
|
|
/* This works correctly regardless of the endianness of the host */
|
|
unsigned char *L1L2 = (unsigned char *)
|
|
(skb->data + iov->iov_len - 6);
|
|
aal5_len = L1L2[0] << 8 | L1L2[1];
|
|
len = (aal5_len == 0x0000) ? 0x10000 : aal5_len;
|
|
if (ns_rsqe_crcerr(rsqe) ||
|
|
len + 8 > iovb->len || len + (47 + 8) < iovb->len) {
|
|
printk("nicstar%d: AAL5 CRC error", card->index);
|
|
if (len + 8 > iovb->len || len + (47 + 8) < iovb->len)
|
|
printk(" - PDU size mismatch.\n");
|
|
else
|
|
printk(".\n");
|
|
atomic_inc(&vcc->stats->rx_err);
|
|
recycle_iovec_rx_bufs(card, (struct iovec *)iovb->data,
|
|
NS_PRV_IOVCNT(iovb));
|
|
vc->rx_iov = NULL;
|
|
recycle_iov_buf(card, iovb);
|
|
return;
|
|
}
|
|
|
|
/* By this point we (hopefully) have a complete SDU without errors. */
|
|
|
|
if (NS_PRV_IOVCNT(iovb) == 1) { /* Just a small buffer */
|
|
/* skb points to a small buffer */
|
|
if (!atm_charge(vcc, skb->truesize)) {
|
|
push_rxbufs(card, skb);
|
|
atomic_inc(&vcc->stats->rx_drop);
|
|
} else {
|
|
skb_put(skb, len);
|
|
dequeue_sm_buf(card, skb);
|
|
#ifdef NS_USE_DESTRUCTORS
|
|
skb->destructor = ns_sb_destructor;
|
|
#endif /* NS_USE_DESTRUCTORS */
|
|
ATM_SKB(skb)->vcc = vcc;
|
|
__net_timestamp(skb);
|
|
vcc->push(vcc, skb);
|
|
atomic_inc(&vcc->stats->rx);
|
|
}
|
|
} else if (NS_PRV_IOVCNT(iovb) == 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, sb);
|
|
atomic_inc(&vcc->stats->rx_drop);
|
|
} else {
|
|
skb_put(sb, len);
|
|
dequeue_sm_buf(card, sb);
|
|
#ifdef NS_USE_DESTRUCTORS
|
|
sb->destructor = ns_sb_destructor;
|
|
#endif /* NS_USE_DESTRUCTORS */
|
|
ATM_SKB(sb)->vcc = vcc;
|
|
__net_timestamp(sb);
|
|
vcc->push(vcc, sb);
|
|
atomic_inc(&vcc->stats->rx);
|
|
}
|
|
|
|
push_rxbufs(card, skb);
|
|
|
|
} else { /* len > NS_SMBUFSIZE, the usual case */
|
|
|
|
if (!atm_charge(vcc, skb->truesize)) {
|
|
push_rxbufs(card, skb);
|
|
atomic_inc(&vcc->stats->rx_drop);
|
|
} else {
|
|
dequeue_lg_buf(card, skb);
|
|
#ifdef NS_USE_DESTRUCTORS
|
|
skb->destructor = ns_lb_destructor;
|
|
#endif /* NS_USE_DESTRUCTORS */
|
|
skb_push(skb, NS_SMBUFSIZE);
|
|
skb_copy_from_linear_data(sb, skb->data,
|
|
NS_SMBUFSIZE);
|
|
skb_put(skb, len - NS_SMBUFSIZE);
|
|
ATM_SKB(skb)->vcc = vcc;
|
|
__net_timestamp(skb);
|
|
vcc->push(vcc, skb);
|
|
atomic_inc(&vcc->stats->rx);
|
|
}
|
|
|
|
push_rxbufs(card, sb);
|
|
|
|
}
|
|
|
|
} 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 = dev_alloc_skb(NS_HBUFSIZE);
|
|
if (hb == NULL) {
|
|
printk
|
|
("nicstar%d: Out of huge buffers.\n",
|
|
card->index);
|
|
atomic_inc(&vcc->stats->rx_drop);
|
|
recycle_iovec_rx_bufs(card,
|
|
(struct iovec *)
|
|
iovb->data,
|
|
NS_PRV_IOVCNT(iovb));
|
|
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 =
|
|
dev_alloc_skb(NS_HBUFSIZE)) !=
|
|
NULL) {
|
|
skb_queue_tail(&card->hbpool.
|
|
queue, new_hb);
|
|
card->hbpool.count++;
|
|
}
|
|
}
|
|
NS_PRV_BUFTYPE(hb) = BUF_NONE;
|
|
} else if (--card->hbpool.count < card->hbnr.min) {
|
|
struct sk_buff *new_hb;
|
|
if ((new_hb =
|
|
dev_alloc_skb(NS_HBUFSIZE)) != NULL) {
|
|
NS_PRV_BUFTYPE(new_hb) = BUF_NONE;
|
|
skb_queue_tail(&card->hbpool.queue,
|
|
new_hb);
|
|
card->hbpool.count++;
|
|
}
|
|
if (card->hbpool.count < card->hbnr.min) {
|
|
if ((new_hb =
|
|
dev_alloc_skb(NS_HBUFSIZE)) !=
|
|
NULL) {
|
|
NS_PRV_BUFTYPE(new_hb) =
|
|
BUF_NONE;
|
|
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,
|
|
NS_PRV_IOVCNT(iovb));
|
|
if (card->hbpool.count < card->hbnr.max) {
|
|
skb_queue_tail(&card->hbpool.queue, hb);
|
|
card->hbpool.count++;
|
|
} else
|
|
dev_kfree_skb_any(hb);
|
|
atomic_inc(&vcc->stats->rx_drop);
|
|
} else {
|
|
/* Copy the small buffer to the huge buffer */
|
|
sb = (struct sk_buff *)iov->iov_base;
|
|
skb_copy_from_linear_data(sb, hb->data,
|
|
iov->iov_len);
|
|
skb_put(hb, iov->iov_len);
|
|
remaining = len - iov->iov_len;
|
|
iov++;
|
|
/* Free the small buffer */
|
|
push_rxbufs(card, sb);
|
|
|
|
/* Copy all large buffers to the huge buffer and free them */
|
|
for (j = 1; j < NS_PRV_IOVCNT(iovb); j++) {
|
|
lb = (struct sk_buff *)iov->iov_base;
|
|
tocopy =
|
|
min_t(int, remaining, iov->iov_len);
|
|
skb_copy_from_linear_data(lb,
|
|
skb_tail_pointer
|
|
(hb), tocopy);
|
|
skb_put(hb, tocopy);
|
|
iov++;
|
|
remaining -= tocopy;
|
|
push_rxbufs(card, lb);
|
|
}
|
|
#ifdef EXTRA_DEBUG
|
|
if (remaining != 0 || hb->len != len)
|
|
printk
|
|
("nicstar%d: Huge buffer len mismatch.\n",
|
|
card->index);
|
|
#endif /* EXTRA_DEBUG */
|
|
ATM_SKB(hb)->vcc = vcc;
|
|
#ifdef NS_USE_DESTRUCTORS
|
|
hb->destructor = ns_hb_destructor;
|
|
#endif /* NS_USE_DESTRUCTORS */
|
|
__net_timestamp(hb);
|
|
vcc->push(vcc, hb);
|
|
atomic_inc(&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 *) ATM_SKB(sb)->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 = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
|
|
if (sb == NULL)
|
|
break;
|
|
NS_PRV_BUFTYPE(sb) = BUF_SM;
|
|
skb_queue_tail(&card->sbpool.queue, sb);
|
|
skb_reserve(sb, NS_AAL0_HEADER);
|
|
push_rxbufs(card, sb);
|
|
} while (card->sbfqc < card->sbnr.min);
|
|
}
|
|
|
|
static void ns_lb_destructor(struct sk_buff *lb)
|
|
{
|
|
ns_dev *card;
|
|
u32 stat;
|
|
|
|
card = (ns_dev *) ATM_SKB(lb)->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 = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
|
|
if (lb == NULL)
|
|
break;
|
|
NS_PRV_BUFTYPE(lb) = BUF_LG;
|
|
skb_queue_tail(&card->lbpool.queue, lb);
|
|
skb_reserve(lb, NS_SMBUFSIZE);
|
|
push_rxbufs(card, lb);
|
|
} while (card->lbfqc < card->lbnr.min);
|
|
}
|
|
|
|
static void ns_hb_destructor(struct sk_buff *hb)
|
|
{
|
|
ns_dev *card;
|
|
|
|
card = (ns_dev *) ATM_SKB(hb)->vcc->dev->dev_data;
|
|
|
|
while (card->hbpool.count < card->hbnr.init) {
|
|
hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
|
|
if (hb == NULL)
|
|
break;
|
|
NS_PRV_BUFTYPE(hb) = BUF_NONE;
|
|
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 (unlikely(NS_PRV_BUFTYPE(skb) == BUF_NONE)) {
|
|
printk("nicstar%d: What kind of rx buffer is this?\n",
|
|
card->index);
|
|
dev_kfree_skb_any(skb);
|
|
} else
|
|
push_rxbufs(card, skb);
|
|
}
|
|
|
|
static void recycle_iovec_rx_bufs(ns_dev * card, struct iovec *iov, int count)
|
|
{
|
|
while (count-- > 0)
|
|
recycle_rx_buf(card, (struct sk_buff *)(iov++)->iov_base);
|
|
}
|
|
|
|
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
|
|
dev_kfree_skb_any(iovb);
|
|
}
|
|
|
|
static void dequeue_sm_buf(ns_dev * card, struct sk_buff *sb)
|
|
{
|
|
skb_unlink(sb, &card->sbpool.queue);
|
|
#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 = dev_alloc_skb(NS_SMSKBSIZE)) != NULL) {
|
|
NS_PRV_BUFTYPE(new_sb) = BUF_SM;
|
|
skb_queue_tail(&card->sbpool.queue, new_sb);
|
|
skb_reserve(new_sb, NS_AAL0_HEADER);
|
|
push_rxbufs(card, new_sb);
|
|
}
|
|
}
|
|
if (card->sbfqc < card->sbnr.init)
|
|
#endif /* NS_USE_DESTRUCTORS */
|
|
{
|
|
struct sk_buff *new_sb;
|
|
if ((new_sb = dev_alloc_skb(NS_SMSKBSIZE)) != NULL) {
|
|
NS_PRV_BUFTYPE(new_sb) = BUF_SM;
|
|
skb_queue_tail(&card->sbpool.queue, new_sb);
|
|
skb_reserve(new_sb, NS_AAL0_HEADER);
|
|
push_rxbufs(card, new_sb);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void dequeue_lg_buf(ns_dev * card, struct sk_buff *lb)
|
|
{
|
|
skb_unlink(lb, &card->lbpool.queue);
|
|
#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 = dev_alloc_skb(NS_LGSKBSIZE)) != NULL) {
|
|
NS_PRV_BUFTYPE(new_lb) = BUF_LG;
|
|
skb_queue_tail(&card->lbpool.queue, new_lb);
|
|
skb_reserve(new_lb, NS_SMBUFSIZE);
|
|
push_rxbufs(card, new_lb);
|
|
}
|
|
}
|
|
if (card->lbfqc < card->lbnr.init)
|
|
#endif /* NS_USE_DESTRUCTORS */
|
|
{
|
|
struct sk_buff *new_lb;
|
|
if ((new_lb = dev_alloc_skb(NS_LGSKBSIZE)) != NULL) {
|
|
NS_PRV_BUFTYPE(new_lb) = BUF_LG;
|
|
skb_queue_tail(&card->lbpool.queue, new_lb);
|
|
skb_reserve(new_lb, NS_SMBUFSIZE);
|
|
push_rxbufs(card, new_lb);
|
|
}
|
|
}
|
|
}
|
|
|
|
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;
|
|
}
|
|
#if 0
|
|
/* Dump 25.6 Mbps PHY registers */
|
|
/* Now there's a 25.6 Mbps PHY driver this code isn't needed. I left it
|
|
here just in case it's needed for debugging. */
|
|
if (card->max_pcr == ATM_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]);
|
|
}
|
|
#endif /* 0 - Dump 25.6 Mbps PHY registers */
|
|
#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 __user * arg)
|
|
{
|
|
ns_dev *card;
|
|
pool_levels pl;
|
|
long btype;
|
|
unsigned long flags;
|
|
|
|
card = dev->dev_data;
|
|
switch (cmd) {
|
|
case NS_GETPSTAT:
|
|
if (get_user
|
|
(pl.buftype, &((pool_levels __user *) 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 -ENOIOCTLCMD;
|
|
|
|
}
|
|
if (!copy_to_user((pool_levels __user *) arg, &pl, sizeof(pl)))
|
|
return (sizeof(pl));
|
|
else
|
|
return -EFAULT;
|
|
|
|
case NS_SETBUFLEV:
|
|
if (!capable(CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
if (copy_from_user(&pl, (pool_levels __user *) 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 (!capable(CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
btype = (long)arg; /* a long is the same size as a pointer or bigger */
|
|
switch (btype) {
|
|
case NS_BUFTYPE_SMALL:
|
|
while (card->sbfqc < card->sbnr.init) {
|
|
struct sk_buff *sb;
|
|
|
|
sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
|
|
if (sb == NULL)
|
|
return -ENOMEM;
|
|
NS_PRV_BUFTYPE(sb) = BUF_SM;
|
|
skb_queue_tail(&card->sbpool.queue, sb);
|
|
skb_reserve(sb, NS_AAL0_HEADER);
|
|
push_rxbufs(card, sb);
|
|
}
|
|
break;
|
|
|
|
case NS_BUFTYPE_LARGE:
|
|
while (card->lbfqc < card->lbnr.init) {
|
|
struct sk_buff *lb;
|
|
|
|
lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
|
|
if (lb == NULL)
|
|
return -ENOMEM;
|
|
NS_PRV_BUFTYPE(lb) = BUF_LG;
|
|
skb_queue_tail(&card->lbpool.queue, lb);
|
|
skb_reserve(lb, NS_SMBUFSIZE);
|
|
push_rxbufs(card, lb);
|
|
}
|
|
break;
|
|
|
|
case NS_BUFTYPE_HUGE:
|
|
while (card->hbpool.count > card->hbnr.init) {
|
|
struct sk_buff *hb;
|
|
|
|
spin_lock_irqsave(&card->int_lock, flags);
|
|
hb = skb_dequeue(&card->hbpool.queue);
|
|
card->hbpool.count--;
|
|
spin_unlock_irqrestore(&card->int_lock, flags);
|
|
if (hb == NULL)
|
|
printk
|
|
("nicstar%d: huge buffer count inconsistent.\n",
|
|
card->index);
|
|
else
|
|
dev_kfree_skb_any(hb);
|
|
|
|
}
|
|
while (card->hbpool.count < card->hbnr.init) {
|
|
struct sk_buff *hb;
|
|
|
|
hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
|
|
if (hb == NULL)
|
|
return -ENOMEM;
|
|
NS_PRV_BUFTYPE(hb) = BUF_NONE;
|
|
spin_lock_irqsave(&card->int_lock, flags);
|
|
skb_queue_tail(&card->hbpool.queue, hb);
|
|
card->hbpool.count++;
|
|
spin_unlock_irqrestore(&card->int_lock, flags);
|
|
}
|
|
break;
|
|
|
|
case NS_BUFTYPE_IOVEC:
|
|
while (card->iovpool.count > card->iovnr.init) {
|
|
struct sk_buff *iovb;
|
|
|
|
spin_lock_irqsave(&card->int_lock, flags);
|
|
iovb = skb_dequeue(&card->iovpool.queue);
|
|
card->iovpool.count--;
|
|
spin_unlock_irqrestore(&card->int_lock, flags);
|
|
if (iovb == NULL)
|
|
printk
|
|
("nicstar%d: iovec buffer count inconsistent.\n",
|
|
card->index);
|
|
else
|
|
dev_kfree_skb_any(iovb);
|
|
|
|
}
|
|
while (card->iovpool.count < card->iovnr.init) {
|
|
struct sk_buff *iovb;
|
|
|
|
iovb = alloc_skb(NS_IOVBUFSIZE, GFP_KERNEL);
|
|
if (iovb == NULL)
|
|
return -ENOMEM;
|
|
NS_PRV_BUFTYPE(iovb) = BUF_NONE;
|
|
spin_lock_irqsave(&card->int_lock, flags);
|
|
skb_queue_tail(&card->iovpool.queue, iovb);
|
|
card->iovpool.count++;
|
|
spin_unlock_irqrestore(&card->int_lock, flags);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
|
|
}
|
|
return 0;
|
|
|
|
default:
|
|
if (dev->phy && dev->phy->ioctl) {
|
|
return dev->phy->ioctl(dev, cmd, arg);
|
|
} else {
|
|
printk("nicstar%d: %s == NULL \n", card->index,
|
|
dev->phy ? "dev->phy->ioctl" : "dev->phy");
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifdef EXTRA_DEBUG
|
|
static void which_list(ns_dev * card, struct sk_buff *skb)
|
|
{
|
|
printk("skb buf_type: 0x%08x\n", NS_PRV_BUFTYPE(skb));
|
|
}
|
|
#endif /* EXTRA_DEBUG */
|
|
|
|
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];
|
|
if (spin_is_locked(&card->int_lock)) {
|
|
/* Probably it isn't worth spinning */
|
|
continue;
|
|
}
|
|
spin_lock_irqsave(&card->int_lock, flags);
|
|
|
|
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(stat_w, card->membase + STAT);
|
|
spin_unlock_irqrestore(&card->int_lock, flags);
|
|
}
|
|
mod_timer(&ns_timer, jiffies + NS_POLL_PERIOD);
|
|
PRINTK("nicstar: Leaving ns_poll().\n");
|
|
}
|
|
|
|
static int ns_parse_mac(char *mac, unsigned char *esi)
|
|
{
|
|
int i, j;
|
|
short byte1, byte0;
|
|
|
|
if (mac == NULL || esi == NULL)
|
|
return -1;
|
|
j = 0;
|
|
for (i = 0; i < 6; i++) {
|
|
if ((byte1 = hex_to_bin(mac[j++])) < 0)
|
|
return -1;
|
|
if ((byte0 = hex_to_bin(mac[j++])) < 0)
|
|
return -1;
|
|
esi[i] = (unsigned char)(byte1 * 16 + byte0);
|
|
if (i < 5) {
|
|
if (mac[j++] != ':')
|
|
return -1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void ns_phy_put(struct atm_dev *dev, unsigned char value,
|
|
unsigned long addr)
|
|
{
|
|
ns_dev *card;
|
|
unsigned long flags;
|
|
|
|
card = dev->dev_data;
|
|
spin_lock_irqsave(&card->res_lock, flags);
|
|
while (CMD_BUSY(card)) ;
|
|
writel((u32) value, card->membase + DR0);
|
|
writel(NS_CMD_WRITE_UTILITY | 0x00000200 | (addr & 0x000000FF),
|
|
card->membase + CMD);
|
|
spin_unlock_irqrestore(&card->res_lock, flags);
|
|
}
|
|
|
|
static unsigned char ns_phy_get(struct atm_dev *dev, unsigned long addr)
|
|
{
|
|
ns_dev *card;
|
|
unsigned long flags;
|
|
u32 data;
|
|
|
|
card = dev->dev_data;
|
|
spin_lock_irqsave(&card->res_lock, flags);
|
|
while (CMD_BUSY(card)) ;
|
|
writel(NS_CMD_READ_UTILITY | 0x00000200 | (addr & 0x000000FF),
|
|
card->membase + CMD);
|
|
while (CMD_BUSY(card)) ;
|
|
data = readl(card->membase + DR0) & 0x000000FF;
|
|
spin_unlock_irqrestore(&card->res_lock, flags);
|
|
return (unsigned char)data;
|
|
}
|
|
|
|
module_init(nicstar_init);
|
|
module_exit(nicstar_cleanup);
|