2320 строки
61 KiB
C
2320 строки
61 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/* drivers/atm/eni.c - Efficient Networks ENI155P device driver */
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/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/pci.h>
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#include <linux/errno.h>
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#include <linux/atm.h>
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#include <linux/atmdev.h>
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#include <linux/sonet.h>
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#include <linux/skbuff.h>
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#include <linux/time.h>
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#include <linux/delay.h>
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#include <linux/uio.h>
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#include <linux/init.h>
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#include <linux/atm_eni.h>
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#include <linux/bitops.h>
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#include <linux/slab.h>
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#include <asm/io.h>
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#include <linux/atomic.h>
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#include <linux/uaccess.h>
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#include <asm/string.h>
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#include <asm/byteorder.h>
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#include "tonga.h"
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#include "midway.h"
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#include "suni.h"
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#include "eni.h"
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/*
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* TODO:
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*
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* Show stoppers
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* none
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*
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* Minor
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* - OAM support
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* - fix bugs listed below
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*/
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/*
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* KNOWN BUGS:
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*
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* - may run into JK-JK bug and deadlock
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* - should allocate UBR channel first
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* - buffer space allocation algorithm is stupid
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* (RX: should be maxSDU+maxdelay*rate
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* TX: should be maxSDU+min(maxSDU,maxdelay*rate) )
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* - doesn't support OAM cells
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* - eni_put_free may hang if not putting memory fragments that _complete_
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* 2^n block (never happens in real life, though)
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*/
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#if 0
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#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
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#else
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#define DPRINTK(format,args...)
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#endif
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#ifndef CONFIG_ATM_ENI_TUNE_BURST
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#define CONFIG_ATM_ENI_BURST_TX_8W
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#define CONFIG_ATM_ENI_BURST_RX_4W
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#endif
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#ifndef CONFIG_ATM_ENI_DEBUG
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#define NULLCHECK(x)
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#define EVENT(s,a,b)
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static void event_dump(void)
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{
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}
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#else
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/*
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* NULL pointer checking
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*/
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#define NULLCHECK(x) \
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if ((unsigned long) (x) < 0x30) \
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printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x))
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/*
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* Very extensive activity logging. Greatly improves bug detection speed but
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* costs a few Mbps if enabled.
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*/
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#define EV 64
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static const char *ev[EV];
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static unsigned long ev_a[EV],ev_b[EV];
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static int ec = 0;
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static void EVENT(const char *s,unsigned long a,unsigned long b)
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{
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ev[ec] = s;
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ev_a[ec] = a;
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ev_b[ec] = b;
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ec = (ec+1) % EV;
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}
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static void event_dump(void)
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{
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int n,i;
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for (n = 0; n < EV; n++) {
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i = (ec+n) % EV;
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printk(KERN_NOTICE);
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printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]);
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}
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}
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#endif /* CONFIG_ATM_ENI_DEBUG */
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/*
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* NExx must not be equal at end
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* EExx may be equal at end
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* xxPJOK verify validity of pointer jumps
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* xxPMOK operating on a circular buffer of "c" words
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*/
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#define NEPJOK(a0,a1,b) \
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((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1))
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#define EEPJOK(a0,a1,b) \
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((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1))
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#define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b)
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#define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b)
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static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0,
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backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0,
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putting = 0;
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static struct atm_dev *eni_boards = NULL;
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/* Read/write registers on card */
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#define eni_in(r) readl(eni_dev->reg+(r)*4)
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#define eni_out(v,r) writel((v),eni_dev->reg+(r)*4)
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/*-------------------------------- utilities --------------------------------*/
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static void dump_mem(struct eni_dev *eni_dev)
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{
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int i;
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for (i = 0; i < eni_dev->free_len; i++)
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printk(KERN_DEBUG " %d: %p %d\n",i,
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eni_dev->free_list[i].start,
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1 << eni_dev->free_list[i].order);
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}
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static void dump(struct atm_dev *dev)
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{
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struct eni_dev *eni_dev;
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int i;
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eni_dev = ENI_DEV(dev);
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printk(KERN_NOTICE "Free memory\n");
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dump_mem(eni_dev);
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printk(KERN_NOTICE "TX buffers\n");
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for (i = 0; i < NR_CHAN; i++)
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if (eni_dev->tx[i].send)
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printk(KERN_NOTICE " TX %d @ %p: %ld\n",i,
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eni_dev->tx[i].send,eni_dev->tx[i].words*4);
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printk(KERN_NOTICE "RX buffers\n");
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for (i = 0; i < 1024; i++)
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if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx)
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printk(KERN_NOTICE " RX %d @ %p: %ld\n",i,
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ENI_VCC(eni_dev->rx_map[i])->recv,
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ENI_VCC(eni_dev->rx_map[i])->words*4);
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printk(KERN_NOTICE "----\n");
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}
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static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start,
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unsigned long size)
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{
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struct eni_free *list;
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int len,order;
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DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size);
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start += eni_dev->base_diff;
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list = eni_dev->free_list;
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len = eni_dev->free_len;
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while (size) {
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if (len >= eni_dev->free_list_size) {
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printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n",
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start,size);
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break;
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}
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for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++);
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if (MID_MIN_BUF_SIZE > (1 << order)) {
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printk(KERN_CRIT "eni_put_free: order %d too small\n",
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order);
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break;
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}
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list[len].start = (void __iomem *) start;
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list[len].order = order;
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len++;
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start += 1 << order;
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size -= 1 << order;
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}
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eni_dev->free_len = len;
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/*dump_mem(eni_dev);*/
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}
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static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size)
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{
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struct eni_free *list;
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void __iomem *start;
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int len,i,order,best_order,index;
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list = eni_dev->free_list;
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len = eni_dev->free_len;
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if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE;
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if (*size > MID_MAX_BUF_SIZE) return NULL;
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for (order = 0; (1 << order) < *size; order++)
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;
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DPRINTK("trying: %ld->%d\n",*size,order);
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best_order = 65; /* we don't have more than 2^64 of anything ... */
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index = 0; /* silence GCC */
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for (i = 0; i < len; i++)
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if (list[i].order == order) {
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best_order = order;
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index = i;
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break;
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}
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else if (best_order > list[i].order && list[i].order > order) {
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best_order = list[i].order;
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index = i;
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}
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if (best_order == 65) return NULL;
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start = list[index].start-eni_dev->base_diff;
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list[index] = list[--len];
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eni_dev->free_len = len;
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*size = 1 << order;
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eni_put_free(eni_dev,start+*size,(1 << best_order)-*size);
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DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start);
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memset_io(start,0,*size); /* never leak data */
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/*dump_mem(eni_dev);*/
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return start;
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}
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static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start,
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unsigned long size)
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{
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struct eni_free *list;
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int len,i,order;
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start += eni_dev->base_diff;
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list = eni_dev->free_list;
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len = eni_dev->free_len;
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for (order = -1; size; order++) size >>= 1;
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DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order);
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for (i = 0; i < len; i++)
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if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) &&
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list[i].order == order) {
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DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i,
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list[i].start,start,1 << order,list[i].order,order);
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list[i] = list[--len];
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start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order));
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order++;
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i = -1;
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continue;
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}
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if (len >= eni_dev->free_list_size) {
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printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start,
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order);
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return;
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}
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list[len].start = start;
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list[len].order = order;
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eni_dev->free_len = len+1;
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/*dump_mem(eni_dev);*/
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}
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/*----------------------------------- RX ------------------------------------*/
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#define ENI_VCC_NOS ((struct atm_vcc *) 1)
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static void rx_ident_err(struct atm_vcc *vcc)
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{
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struct atm_dev *dev;
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struct eni_dev *eni_dev;
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struct eni_vcc *eni_vcc;
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dev = vcc->dev;
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eni_dev = ENI_DEV(dev);
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/* immediately halt adapter */
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eni_out(eni_in(MID_MC_S) &
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~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S);
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/* dump useful information */
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eni_vcc = ENI_VCC(vcc);
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printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident "
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"mismatch\n",dev->number);
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printk(KERN_ALERT " VCI %d, rxing %d, words %ld\n",vcc->vci,
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eni_vcc->rxing,eni_vcc->words);
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printk(KERN_ALERT " host descr 0x%lx, rx pos 0x%lx, descr value "
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"0x%x\n",eni_vcc->descr,eni_vcc->rx_pos,
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(unsigned) readl(eni_vcc->recv+eni_vcc->descr*4));
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printk(KERN_ALERT " last %p, servicing %d\n",eni_vcc->last,
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eni_vcc->servicing);
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EVENT("---dump ends here---\n",0,0);
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printk(KERN_NOTICE "---recent events---\n");
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event_dump();
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ENI_DEV(dev)->fast = NULL; /* really stop it */
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ENI_DEV(dev)->slow = NULL;
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skb_queue_head_init(&ENI_DEV(dev)->rx_queue);
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}
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static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb,
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unsigned long skip,unsigned long size,unsigned long eff)
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{
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struct eni_dev *eni_dev;
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struct eni_vcc *eni_vcc;
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u32 dma_rd,dma_wr;
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u32 dma[RX_DMA_BUF*2];
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dma_addr_t paddr;
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unsigned long here;
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int i,j;
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eni_dev = ENI_DEV(vcc->dev);
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eni_vcc = ENI_VCC(vcc);
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paddr = 0; /* GCC, shut up */
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if (skb) {
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paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len,
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DMA_FROM_DEVICE);
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if (dma_mapping_error(&eni_dev->pci_dev->dev, paddr))
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goto dma_map_error;
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ENI_PRV_PADDR(skb) = paddr;
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if (paddr & 3)
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printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has "
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"mis-aligned RX data (0x%lx)\n",vcc->dev->number,
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vcc->vci,(unsigned long) paddr);
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ENI_PRV_SIZE(skb) = size+skip;
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/* PDU plus descriptor */
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ATM_SKB(skb)->vcc = vcc;
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}
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j = 0;
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if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */
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here = (eni_vcc->descr+skip) & (eni_vcc->words-1);
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dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci
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<< MID_DMA_VCI_SHIFT) | MID_DT_JK;
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dma[j++] = 0;
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}
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here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1);
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if (!eff) size += skip;
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else {
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unsigned long words;
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if (!size) {
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DPRINTK("strange things happen ...\n");
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EVENT("strange things happen ... (skip=%ld,eff=%ld)\n",
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size,eff);
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}
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words = eff;
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if (paddr & 15) {
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unsigned long init;
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init = 4-((paddr & 15) >> 2);
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if (init > words) init = words;
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dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
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(vcc->vci << MID_DMA_VCI_SHIFT);
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dma[j++] = paddr;
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paddr += init << 2;
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words -= init;
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}
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#ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */
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if (words & ~15) {
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dma[j++] = MID_DT_16W | ((words >> 4) <<
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MID_DMA_COUNT_SHIFT) | (vcc->vci <<
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MID_DMA_VCI_SHIFT);
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dma[j++] = paddr;
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paddr += (words & ~15) << 2;
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words &= 15;
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}
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#endif
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#ifdef CONFIG_ATM_ENI_BURST_RX_8W /* works only with *some* PCI chipsets ... */
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if (words & ~7) {
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dma[j++] = MID_DT_8W | ((words >> 3) <<
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MID_DMA_COUNT_SHIFT) | (vcc->vci <<
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MID_DMA_VCI_SHIFT);
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dma[j++] = paddr;
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paddr += (words & ~7) << 2;
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words &= 7;
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}
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#endif
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#ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */
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if (words & ~3) {
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dma[j++] = MID_DT_4W | ((words >> 2) <<
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MID_DMA_COUNT_SHIFT) | (vcc->vci <<
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MID_DMA_VCI_SHIFT);
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dma[j++] = paddr;
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paddr += (words & ~3) << 2;
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words &= 3;
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}
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#endif
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#ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */
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if (words & ~1) {
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dma[j++] = MID_DT_2W | ((words >> 1) <<
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MID_DMA_COUNT_SHIFT) | (vcc->vci <<
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MID_DMA_VCI_SHIFT);
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dma[j++] = paddr;
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paddr += (words & ~1) << 2;
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words &= 1;
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}
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#endif
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if (words) {
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dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT)
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| (vcc->vci << MID_DMA_VCI_SHIFT);
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dma[j++] = paddr;
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}
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}
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if (size != eff) {
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dma[j++] = (here << MID_DMA_COUNT_SHIFT) |
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(vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK;
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dma[j++] = 0;
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}
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if (!j || j > 2*RX_DMA_BUF) {
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printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n");
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goto trouble;
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}
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dma[j-2] |= MID_DMA_END;
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j = j >> 1;
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dma_wr = eni_in(MID_DMA_WR_RX);
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dma_rd = eni_in(MID_DMA_RD_RX);
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/*
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* Can I move the dma_wr pointer by 2j+1 positions without overwriting
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* data that hasn't been read (position of dma_rd) yet ?
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*/
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if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */
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printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n",
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vcc->dev->number);
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goto trouble;
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}
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for (i = 0; i < j; i++) {
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writel(dma[i*2],eni_dev->rx_dma+dma_wr*8);
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writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4);
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dma_wr = (dma_wr+1) & (NR_DMA_RX-1);
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}
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if (skb) {
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ENI_PRV_POS(skb) = eni_vcc->descr+size+1;
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skb_queue_tail(&eni_dev->rx_queue,skb);
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eni_vcc->last = skb;
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rx_enqueued++;
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}
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eni_vcc->descr = here;
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eni_out(dma_wr,MID_DMA_WR_RX);
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return 0;
|
|
|
|
trouble:
|
|
if (paddr)
|
|
dma_unmap_single(&eni_dev->pci_dev->dev,paddr,skb->len,
|
|
DMA_FROM_DEVICE);
|
|
dma_map_error:
|
|
if (skb) dev_kfree_skb_irq(skb);
|
|
return -1;
|
|
}
|
|
|
|
|
|
static void discard(struct atm_vcc *vcc,unsigned long size)
|
|
{
|
|
struct eni_vcc *eni_vcc;
|
|
|
|
eni_vcc = ENI_VCC(vcc);
|
|
EVENT("discard (size=%ld)\n",size,0);
|
|
while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0);
|
|
/* could do a full fallback, but that might be more expensive */
|
|
if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1;
|
|
else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1);
|
|
}
|
|
|
|
|
|
/*
|
|
* TODO: should check whether direct copies (without DMA setup, dequeuing on
|
|
* interrupt, etc.) aren't much faster for AAL0
|
|
*/
|
|
|
|
static int rx_aal0(struct atm_vcc *vcc)
|
|
{
|
|
struct eni_vcc *eni_vcc;
|
|
unsigned long descr;
|
|
unsigned long length;
|
|
struct sk_buff *skb;
|
|
|
|
DPRINTK(">rx_aal0\n");
|
|
eni_vcc = ENI_VCC(vcc);
|
|
descr = readl(eni_vcc->recv+eni_vcc->descr*4);
|
|
if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
|
|
rx_ident_err(vcc);
|
|
return 1;
|
|
}
|
|
if (descr & MID_RED_T) {
|
|
DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
|
|
vcc->dev->number);
|
|
length = 0;
|
|
atomic_inc(&vcc->stats->rx_err);
|
|
}
|
|
else {
|
|
length = ATM_CELL_SIZE-1; /* no HEC */
|
|
}
|
|
skb = length ? atm_alloc_charge(vcc,length,GFP_ATOMIC) : NULL;
|
|
if (!skb) {
|
|
discard(vcc,length >> 2);
|
|
return 0;
|
|
}
|
|
skb_put(skb,length);
|
|
skb->tstamp = eni_vcc->timestamp;
|
|
DPRINTK("got len %ld\n",length);
|
|
if (do_rx_dma(vcc,skb,1,length >> 2,length >> 2)) return 1;
|
|
eni_vcc->rxing++;
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int rx_aal5(struct atm_vcc *vcc)
|
|
{
|
|
struct eni_vcc *eni_vcc;
|
|
unsigned long descr;
|
|
unsigned long size,eff,length;
|
|
struct sk_buff *skb;
|
|
|
|
EVENT("rx_aal5\n",0,0);
|
|
DPRINTK(">rx_aal5\n");
|
|
eni_vcc = ENI_VCC(vcc);
|
|
descr = readl(eni_vcc->recv+eni_vcc->descr*4);
|
|
if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
|
|
rx_ident_err(vcc);
|
|
return 1;
|
|
}
|
|
if (descr & (MID_RED_T | MID_RED_CRC_ERR)) {
|
|
if (descr & MID_RED_T) {
|
|
EVENT("empty cell (descr=0x%lx)\n",descr,0);
|
|
DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
|
|
vcc->dev->number);
|
|
size = 0;
|
|
}
|
|
else {
|
|
static unsigned long silence = 0;
|
|
|
|
if (time_after(jiffies, silence) || silence == 0) {
|
|
printk(KERN_WARNING DEV_LABEL "(itf %d): "
|
|
"discarding PDU(s) with CRC error\n",
|
|
vcc->dev->number);
|
|
silence = (jiffies+2*HZ)|1;
|
|
}
|
|
size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
|
|
EVENT("CRC error (descr=0x%lx,size=%ld)\n",descr,
|
|
size);
|
|
}
|
|
eff = length = 0;
|
|
atomic_inc(&vcc->stats->rx_err);
|
|
}
|
|
else {
|
|
size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
|
|
DPRINTK("size=%ld\n",size);
|
|
length = readl(eni_vcc->recv+(((eni_vcc->descr+size-1) &
|
|
(eni_vcc->words-1)))*4) & 0xffff;
|
|
/* -trailer(2)+header(1) */
|
|
if (length && length <= (size << 2)-8 && length <=
|
|
ATM_MAX_AAL5_PDU) eff = (length+3) >> 2;
|
|
else { /* ^ trailer length (8) */
|
|
EVENT("bad PDU (descr=0x08%lx,length=%ld)\n",descr,
|
|
length);
|
|
printk(KERN_ERR DEV_LABEL "(itf %d): bad AAL5 PDU "
|
|
"(VCI=%d,length=%ld,size=%ld (descr 0x%lx))\n",
|
|
vcc->dev->number,vcc->vci,length,size << 2,descr);
|
|
length = eff = 0;
|
|
atomic_inc(&vcc->stats->rx_err);
|
|
}
|
|
}
|
|
skb = eff ? atm_alloc_charge(vcc,eff << 2,GFP_ATOMIC) : NULL;
|
|
if (!skb) {
|
|
discard(vcc,size);
|
|
return 0;
|
|
}
|
|
skb_put(skb,length);
|
|
DPRINTK("got len %ld\n",length);
|
|
if (do_rx_dma(vcc,skb,1,size,eff)) return 1;
|
|
eni_vcc->rxing++;
|
|
return 0;
|
|
}
|
|
|
|
|
|
static inline int rx_vcc(struct atm_vcc *vcc)
|
|
{
|
|
void __iomem *vci_dsc;
|
|
unsigned long tmp;
|
|
struct eni_vcc *eni_vcc;
|
|
|
|
eni_vcc = ENI_VCC(vcc);
|
|
vci_dsc = ENI_DEV(vcc->dev)->vci+vcc->vci*16;
|
|
EVENT("rx_vcc(1)\n",0,0);
|
|
while (eni_vcc->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) >>
|
|
MID_VCI_DESCR_SHIFT)) {
|
|
EVENT("rx_vcc(2: host dsc=0x%lx, nic dsc=0x%lx)\n",
|
|
eni_vcc->descr,tmp);
|
|
DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
|
|
(((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
|
|
MID_VCI_DESCR_SHIFT));
|
|
if (ENI_VCC(vcc)->rx(vcc)) return 1;
|
|
}
|
|
/* clear IN_SERVICE flag */
|
|
writel(readl(vci_dsc) & ~MID_VCI_IN_SERVICE,vci_dsc);
|
|
/*
|
|
* If new data has arrived between evaluating the while condition and
|
|
* clearing IN_SERVICE, we wouldn't be notified until additional data
|
|
* follows. So we have to loop again to be sure.
|
|
*/
|
|
EVENT("rx_vcc(3)\n",0,0);
|
|
while (ENI_VCC(vcc)->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR)
|
|
>> MID_VCI_DESCR_SHIFT)) {
|
|
EVENT("rx_vcc(4: host dsc=0x%lx, nic dsc=0x%lx)\n",
|
|
eni_vcc->descr,tmp);
|
|
DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
|
|
(((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
|
|
MID_VCI_DESCR_SHIFT));
|
|
if (ENI_VCC(vcc)->rx(vcc)) return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void poll_rx(struct atm_dev *dev)
|
|
{
|
|
struct eni_dev *eni_dev;
|
|
struct atm_vcc *curr;
|
|
|
|
eni_dev = ENI_DEV(dev);
|
|
while ((curr = eni_dev->fast)) {
|
|
EVENT("poll_rx.fast\n",0,0);
|
|
if (rx_vcc(curr)) return;
|
|
eni_dev->fast = ENI_VCC(curr)->next;
|
|
ENI_VCC(curr)->next = ENI_VCC_NOS;
|
|
barrier();
|
|
ENI_VCC(curr)->servicing--;
|
|
}
|
|
while ((curr = eni_dev->slow)) {
|
|
EVENT("poll_rx.slow\n",0,0);
|
|
if (rx_vcc(curr)) return;
|
|
eni_dev->slow = ENI_VCC(curr)->next;
|
|
ENI_VCC(curr)->next = ENI_VCC_NOS;
|
|
barrier();
|
|
ENI_VCC(curr)->servicing--;
|
|
}
|
|
}
|
|
|
|
|
|
static void get_service(struct atm_dev *dev)
|
|
{
|
|
struct eni_dev *eni_dev;
|
|
struct atm_vcc *vcc;
|
|
unsigned long vci;
|
|
|
|
DPRINTK(">get_service\n");
|
|
eni_dev = ENI_DEV(dev);
|
|
while (eni_in(MID_SERV_WRITE) != eni_dev->serv_read) {
|
|
vci = readl(eni_dev->service+eni_dev->serv_read*4);
|
|
eni_dev->serv_read = (eni_dev->serv_read+1) & (NR_SERVICE-1);
|
|
vcc = eni_dev->rx_map[vci & 1023];
|
|
if (!vcc) {
|
|
printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %ld not "
|
|
"found\n",dev->number,vci);
|
|
continue; /* nasty but we try to go on anyway */
|
|
/* @@@ nope, doesn't work */
|
|
}
|
|
EVENT("getting from service\n",0,0);
|
|
if (ENI_VCC(vcc)->next != ENI_VCC_NOS) {
|
|
EVENT("double service\n",0,0);
|
|
DPRINTK("Grr, servicing VCC %ld twice\n",vci);
|
|
continue;
|
|
}
|
|
ENI_VCC(vcc)->timestamp = ktime_get_real();
|
|
ENI_VCC(vcc)->next = NULL;
|
|
if (vcc->qos.rxtp.traffic_class == ATM_CBR) {
|
|
if (eni_dev->fast)
|
|
ENI_VCC(eni_dev->last_fast)->next = vcc;
|
|
else eni_dev->fast = vcc;
|
|
eni_dev->last_fast = vcc;
|
|
}
|
|
else {
|
|
if (eni_dev->slow)
|
|
ENI_VCC(eni_dev->last_slow)->next = vcc;
|
|
else eni_dev->slow = vcc;
|
|
eni_dev->last_slow = vcc;
|
|
}
|
|
putting++;
|
|
ENI_VCC(vcc)->servicing++;
|
|
}
|
|
}
|
|
|
|
|
|
static void dequeue_rx(struct atm_dev *dev)
|
|
{
|
|
struct eni_dev *eni_dev;
|
|
struct eni_vcc *eni_vcc;
|
|
struct atm_vcc *vcc;
|
|
struct sk_buff *skb;
|
|
void __iomem *vci_dsc;
|
|
int first;
|
|
|
|
eni_dev = ENI_DEV(dev);
|
|
first = 1;
|
|
while (1) {
|
|
skb = skb_dequeue(&eni_dev->rx_queue);
|
|
if (!skb) {
|
|
if (first) {
|
|
DPRINTK(DEV_LABEL "(itf %d): RX but not "
|
|
"rxing\n",dev->number);
|
|
EVENT("nothing to dequeue\n",0,0);
|
|
}
|
|
break;
|
|
}
|
|
EVENT("dequeued (size=%ld,pos=0x%lx)\n",ENI_PRV_SIZE(skb),
|
|
ENI_PRV_POS(skb));
|
|
rx_dequeued++;
|
|
vcc = ATM_SKB(skb)->vcc;
|
|
eni_vcc = ENI_VCC(vcc);
|
|
first = 0;
|
|
vci_dsc = eni_dev->vci+vcc->vci*16;
|
|
if (!EEPMOK(eni_vcc->rx_pos,ENI_PRV_SIZE(skb),
|
|
(readl(vci_dsc+4) & MID_VCI_READ) >> MID_VCI_READ_SHIFT,
|
|
eni_vcc->words)) {
|
|
EVENT("requeuing\n",0,0);
|
|
skb_queue_head(&eni_dev->rx_queue,skb);
|
|
break;
|
|
}
|
|
eni_vcc->rxing--;
|
|
eni_vcc->rx_pos = ENI_PRV_POS(skb) & (eni_vcc->words-1);
|
|
dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len,
|
|
DMA_TO_DEVICE);
|
|
if (!skb->len) dev_kfree_skb_irq(skb);
|
|
else {
|
|
EVENT("pushing (len=%ld)\n",skb->len,0);
|
|
if (vcc->qos.aal == ATM_AAL0)
|
|
*(unsigned long *) skb->data =
|
|
ntohl(*(unsigned long *) skb->data);
|
|
memset(skb->cb,0,sizeof(struct eni_skb_prv));
|
|
vcc->push(vcc,skb);
|
|
pushed++;
|
|
}
|
|
atomic_inc(&vcc->stats->rx);
|
|
}
|
|
wake_up(&eni_dev->rx_wait);
|
|
}
|
|
|
|
|
|
static int open_rx_first(struct atm_vcc *vcc)
|
|
{
|
|
struct eni_dev *eni_dev;
|
|
struct eni_vcc *eni_vcc;
|
|
unsigned long size;
|
|
|
|
DPRINTK("open_rx_first\n");
|
|
eni_dev = ENI_DEV(vcc->dev);
|
|
eni_vcc = ENI_VCC(vcc);
|
|
eni_vcc->rx = NULL;
|
|
if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0;
|
|
size = vcc->qos.rxtp.max_sdu*eni_dev->rx_mult/100;
|
|
if (size > MID_MAX_BUF_SIZE && vcc->qos.rxtp.max_sdu <=
|
|
MID_MAX_BUF_SIZE)
|
|
size = MID_MAX_BUF_SIZE;
|
|
eni_vcc->recv = eni_alloc_mem(eni_dev,&size);
|
|
DPRINTK("rx at 0x%lx\n",eni_vcc->recv);
|
|
eni_vcc->words = size >> 2;
|
|
if (!eni_vcc->recv) return -ENOBUFS;
|
|
eni_vcc->rx = vcc->qos.aal == ATM_AAL5 ? rx_aal5 : rx_aal0;
|
|
eni_vcc->descr = 0;
|
|
eni_vcc->rx_pos = 0;
|
|
eni_vcc->rxing = 0;
|
|
eni_vcc->servicing = 0;
|
|
eni_vcc->next = ENI_VCC_NOS;
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int open_rx_second(struct atm_vcc *vcc)
|
|
{
|
|
void __iomem *here;
|
|
struct eni_dev *eni_dev;
|
|
struct eni_vcc *eni_vcc;
|
|
unsigned long size;
|
|
int order;
|
|
|
|
DPRINTK("open_rx_second\n");
|
|
eni_dev = ENI_DEV(vcc->dev);
|
|
eni_vcc = ENI_VCC(vcc);
|
|
if (!eni_vcc->rx) return 0;
|
|
/* set up VCI descriptor */
|
|
here = eni_dev->vci+vcc->vci*16;
|
|
DPRINTK("loc 0x%x\n",(unsigned) (eni_vcc->recv-eni_dev->ram)/4);
|
|
size = eni_vcc->words >> 8;
|
|
for (order = -1; size; order++) size >>= 1;
|
|
writel(0,here+4); /* descr, read = 0 */
|
|
writel(0,here+8); /* write, state, count = 0 */
|
|
if (eni_dev->rx_map[vcc->vci])
|
|
printk(KERN_CRIT DEV_LABEL "(itf %d): BUG - VCI %d already "
|
|
"in use\n",vcc->dev->number,vcc->vci);
|
|
eni_dev->rx_map[vcc->vci] = vcc; /* now it counts */
|
|
writel(((vcc->qos.aal != ATM_AAL5 ? MID_MODE_RAW : MID_MODE_AAL5) <<
|
|
MID_VCI_MODE_SHIFT) | MID_VCI_PTI_MODE |
|
|
(((eni_vcc->recv-eni_dev->ram) >> (MID_LOC_SKIP+2)) <<
|
|
MID_VCI_LOCATION_SHIFT) | (order << MID_VCI_SIZE_SHIFT),here);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void close_rx(struct atm_vcc *vcc)
|
|
{
|
|
DECLARE_WAITQUEUE(wait,current);
|
|
void __iomem *here;
|
|
struct eni_dev *eni_dev;
|
|
struct eni_vcc *eni_vcc;
|
|
|
|
eni_vcc = ENI_VCC(vcc);
|
|
if (!eni_vcc->rx) return;
|
|
eni_dev = ENI_DEV(vcc->dev);
|
|
if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) {
|
|
here = eni_dev->vci+vcc->vci*16;
|
|
/* block receiver */
|
|
writel((readl(here) & ~MID_VCI_MODE) | (MID_MODE_TRASH <<
|
|
MID_VCI_MODE_SHIFT),here);
|
|
/* wait for receiver to become idle */
|
|
udelay(27);
|
|
/* discard pending cell */
|
|
writel(readl(here) & ~MID_VCI_IN_SERVICE,here);
|
|
/* don't accept any new ones */
|
|
eni_dev->rx_map[vcc->vci] = NULL;
|
|
/* wait for RX queue to drain */
|
|
DPRINTK("eni_close: waiting for RX ...\n");
|
|
EVENT("RX closing\n",0,0);
|
|
add_wait_queue(&eni_dev->rx_wait,&wait);
|
|
set_current_state(TASK_UNINTERRUPTIBLE);
|
|
barrier();
|
|
for (;;) {
|
|
/* transition service->rx: rxing++, servicing-- */
|
|
if (!eni_vcc->servicing) {
|
|
barrier();
|
|
if (!eni_vcc->rxing) break;
|
|
}
|
|
EVENT("drain PDUs (rx %ld, serv %ld)\n",eni_vcc->rxing,
|
|
eni_vcc->servicing);
|
|
printk(KERN_INFO "%d+%d RX left\n",eni_vcc->servicing,
|
|
eni_vcc->rxing);
|
|
schedule();
|
|
set_current_state(TASK_UNINTERRUPTIBLE);
|
|
}
|
|
for (;;) {
|
|
int at_end;
|
|
u32 tmp;
|
|
|
|
tasklet_disable(&eni_dev->task);
|
|
tmp = readl(eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ;
|
|
at_end = eni_vcc->rx_pos == tmp >> MID_VCI_READ_SHIFT;
|
|
tasklet_enable(&eni_dev->task);
|
|
if (at_end) break;
|
|
EVENT("drain discard (host 0x%lx, nic 0x%lx)\n",
|
|
eni_vcc->rx_pos,tmp);
|
|
printk(KERN_INFO "draining RX: host 0x%lx, nic 0x%x\n",
|
|
eni_vcc->rx_pos,tmp);
|
|
schedule();
|
|
set_current_state(TASK_UNINTERRUPTIBLE);
|
|
}
|
|
set_current_state(TASK_RUNNING);
|
|
remove_wait_queue(&eni_dev->rx_wait,&wait);
|
|
}
|
|
eni_free_mem(eni_dev,eni_vcc->recv,eni_vcc->words << 2);
|
|
eni_vcc->rx = NULL;
|
|
}
|
|
|
|
|
|
static int start_rx(struct atm_dev *dev)
|
|
{
|
|
struct eni_dev *eni_dev;
|
|
|
|
eni_dev = ENI_DEV(dev);
|
|
eni_dev->rx_map = (struct atm_vcc **) get_zeroed_page(GFP_KERNEL);
|
|
if (!eni_dev->rx_map) {
|
|
printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
|
|
dev->number);
|
|
free_page((unsigned long) eni_dev->free_list);
|
|
return -ENOMEM;
|
|
}
|
|
eni_dev->rx_mult = DEFAULT_RX_MULT;
|
|
eni_dev->fast = eni_dev->last_fast = NULL;
|
|
eni_dev->slow = eni_dev->last_slow = NULL;
|
|
init_waitqueue_head(&eni_dev->rx_wait);
|
|
skb_queue_head_init(&eni_dev->rx_queue);
|
|
eni_dev->serv_read = eni_in(MID_SERV_WRITE);
|
|
eni_out(0,MID_DMA_WR_RX);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*----------------------------------- TX ------------------------------------*/
|
|
|
|
|
|
enum enq_res { enq_ok,enq_next,enq_jam };
|
|
|
|
|
|
static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr,
|
|
u32 size)
|
|
{
|
|
u32 init,words;
|
|
|
|
DPRINTK("put_dma: 0x%lx+0x%x\n",(unsigned long) paddr,size);
|
|
EVENT("put_dma: 0x%lx+0x%lx\n",(unsigned long) paddr,size);
|
|
#if 0 /* don't complain anymore */
|
|
if (paddr & 3)
|
|
printk(KERN_ERR "put_dma: unaligned addr (0x%lx)\n",paddr);
|
|
if (size & 3)
|
|
printk(KERN_ERR "put_dma: unaligned size (0x%lx)\n",size);
|
|
#endif
|
|
if (paddr & 3) {
|
|
init = 4-(paddr & 3);
|
|
if (init > size || size < 7) init = size;
|
|
DPRINTK("put_dma: %lx DMA: %d/%d bytes\n",
|
|
(unsigned long) paddr,init,size);
|
|
dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) |
|
|
(chan << MID_DMA_CHAN_SHIFT);
|
|
dma[(*j)++] = paddr;
|
|
paddr += init;
|
|
size -= init;
|
|
}
|
|
words = size >> 2;
|
|
size &= 3;
|
|
if (words && (paddr & 31)) {
|
|
init = 8-((paddr & 31) >> 2);
|
|
if (init > words) init = words;
|
|
DPRINTK("put_dma: %lx DMA: %d/%d words\n",
|
|
(unsigned long) paddr,init,words);
|
|
dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
|
|
(chan << MID_DMA_CHAN_SHIFT);
|
|
dma[(*j)++] = paddr;
|
|
paddr += init << 2;
|
|
words -= init;
|
|
}
|
|
#ifdef CONFIG_ATM_ENI_BURST_TX_16W /* may work with some PCI chipsets ... */
|
|
if (words & ~15) {
|
|
DPRINTK("put_dma: %lx DMA: %d*16/%d words\n",
|
|
(unsigned long) paddr,words >> 4,words);
|
|
dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT)
|
|
| (chan << MID_DMA_CHAN_SHIFT);
|
|
dma[(*j)++] = paddr;
|
|
paddr += (words & ~15) << 2;
|
|
words &= 15;
|
|
}
|
|
#endif
|
|
#ifdef CONFIG_ATM_ENI_BURST_TX_8W /* recommended */
|
|
if (words & ~7) {
|
|
DPRINTK("put_dma: %lx DMA: %d*8/%d words\n",
|
|
(unsigned long) paddr,words >> 3,words);
|
|
dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT)
|
|
| (chan << MID_DMA_CHAN_SHIFT);
|
|
dma[(*j)++] = paddr;
|
|
paddr += (words & ~7) << 2;
|
|
words &= 7;
|
|
}
|
|
#endif
|
|
#ifdef CONFIG_ATM_ENI_BURST_TX_4W /* probably useless if TX_8W or TX_16W */
|
|
if (words & ~3) {
|
|
DPRINTK("put_dma: %lx DMA: %d*4/%d words\n",
|
|
(unsigned long) paddr,words >> 2,words);
|
|
dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT)
|
|
| (chan << MID_DMA_CHAN_SHIFT);
|
|
dma[(*j)++] = paddr;
|
|
paddr += (words & ~3) << 2;
|
|
words &= 3;
|
|
}
|
|
#endif
|
|
#ifdef CONFIG_ATM_ENI_BURST_TX_2W /* probably useless if TX_4W, TX_8W, ... */
|
|
if (words & ~1) {
|
|
DPRINTK("put_dma: %lx DMA: %d*2/%d words\n",
|
|
(unsigned long) paddr,words >> 1,words);
|
|
dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT)
|
|
| (chan << MID_DMA_CHAN_SHIFT);
|
|
dma[(*j)++] = paddr;
|
|
paddr += (words & ~1) << 2;
|
|
words &= 1;
|
|
}
|
|
#endif
|
|
if (words) {
|
|
DPRINTK("put_dma: %lx DMA: %d words\n",(unsigned long) paddr,
|
|
words);
|
|
dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) |
|
|
(chan << MID_DMA_CHAN_SHIFT);
|
|
dma[(*j)++] = paddr;
|
|
paddr += words << 2;
|
|
}
|
|
if (size) {
|
|
DPRINTK("put_dma: %lx DMA: %d bytes\n",(unsigned long) paddr,
|
|
size);
|
|
dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) |
|
|
(chan << MID_DMA_CHAN_SHIFT);
|
|
dma[(*j)++] = paddr;
|
|
}
|
|
}
|
|
|
|
|
|
static enum enq_res do_tx(struct sk_buff *skb)
|
|
{
|
|
struct atm_vcc *vcc;
|
|
struct eni_dev *eni_dev;
|
|
struct eni_vcc *eni_vcc;
|
|
struct eni_tx *tx;
|
|
dma_addr_t paddr;
|
|
u32 dma_rd,dma_wr;
|
|
u32 size; /* in words */
|
|
int aal5,dma_size,i,j;
|
|
unsigned char skb_data3;
|
|
|
|
DPRINTK(">do_tx\n");
|
|
NULLCHECK(skb);
|
|
EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,skb->len);
|
|
vcc = ATM_SKB(skb)->vcc;
|
|
NULLCHECK(vcc);
|
|
eni_dev = ENI_DEV(vcc->dev);
|
|
NULLCHECK(eni_dev);
|
|
eni_vcc = ENI_VCC(vcc);
|
|
tx = eni_vcc->tx;
|
|
NULLCHECK(tx);
|
|
#if 0 /* Enable this for testing with the "align" program */
|
|
{
|
|
unsigned int hack = *((char *) skb->data)-'0';
|
|
|
|
if (hack < 8) {
|
|
skb->data += hack;
|
|
skb->len -= hack;
|
|
}
|
|
}
|
|
#endif
|
|
#if 0 /* should work now */
|
|
if ((unsigned long) skb->data & 3)
|
|
printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned "
|
|
"TX data\n",vcc->dev->number,vcc->vci);
|
|
#endif
|
|
/*
|
|
* Potential future IP speedup: make hard_header big enough to put
|
|
* segmentation descriptor directly into PDU. Saves: 4 slave writes,
|
|
* 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-)
|
|
*/
|
|
|
|
aal5 = vcc->qos.aal == ATM_AAL5;
|
|
/* check space in buffer */
|
|
if (!aal5)
|
|
size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE;
|
|
/* cell without HEC plus segmentation header (includes
|
|
four-byte cell header) */
|
|
else {
|
|
size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1;
|
|
/* add AAL5 trailer */
|
|
size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE;
|
|
/* add segmentation header */
|
|
}
|
|
/*
|
|
* Can I move tx_pos by size bytes without getting closer than TX_GAP
|
|
* to the read pointer ? TX_GAP means to leave some space for what
|
|
* the manual calls "too close".
|
|
*/
|
|
if (!NEPMOK(tx->tx_pos,size+TX_GAP,
|
|
eni_in(MID_TX_RDPTR(tx->index)),tx->words)) {
|
|
DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n",
|
|
vcc->dev->number,size);
|
|
return enq_next;
|
|
}
|
|
/* check DMA */
|
|
dma_wr = eni_in(MID_DMA_WR_TX);
|
|
dma_rd = eni_in(MID_DMA_RD_TX);
|
|
dma_size = 3; /* JK for descriptor and final fill, plus final size
|
|
mis-alignment fix */
|
|
DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags);
|
|
if (!skb_shinfo(skb)->nr_frags) dma_size += 5;
|
|
else dma_size += 5*(skb_shinfo(skb)->nr_frags+1);
|
|
if (dma_size > TX_DMA_BUF) {
|
|
printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries "
|
|
"(got only %d)\n",vcc->dev->number,dma_size,TX_DMA_BUF);
|
|
}
|
|
DPRINTK("dma_wr is %d, tx_pos is %ld\n",dma_wr,tx->tx_pos);
|
|
if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) <
|
|
dma_size) {
|
|
printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n",
|
|
vcc->dev->number);
|
|
return enq_jam;
|
|
}
|
|
skb_data3 = skb->data[3];
|
|
paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len,
|
|
DMA_TO_DEVICE);
|
|
ENI_PRV_PADDR(skb) = paddr;
|
|
/* prepare DMA queue entries */
|
|
j = 0;
|
|
eni_dev->dma[j++] = (((tx->tx_pos+TX_DESCR_SIZE) & (tx->words-1)) <<
|
|
MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
|
|
MID_DT_JK;
|
|
j++;
|
|
if (!skb_shinfo(skb)->nr_frags)
|
|
if (aal5) put_dma(tx->index,eni_dev->dma,&j,paddr,skb->len);
|
|
else put_dma(tx->index,eni_dev->dma,&j,paddr+4,skb->len-4);
|
|
else {
|
|
DPRINTK("doing direct send\n"); /* @@@ well, this doesn't work anyway */
|
|
for (i = -1; i < skb_shinfo(skb)->nr_frags; i++)
|
|
if (i == -1)
|
|
put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
|
|
skb->data,
|
|
skb_headlen(skb));
|
|
else
|
|
put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
|
|
skb_frag_page(&skb_shinfo(skb)->frags[i]) +
|
|
skb_frag_off(&skb_shinfo(skb)->frags[i]),
|
|
skb_frag_size(&skb_shinfo(skb)->frags[i]));
|
|
}
|
|
if (skb->len & 3) {
|
|
put_dma(tx->index, eni_dev->dma, &j, eni_dev->zero.dma,
|
|
4 - (skb->len & 3));
|
|
}
|
|
/* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */
|
|
eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) <<
|
|
MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
|
|
MID_DMA_END | MID_DT_JK;
|
|
j++;
|
|
DPRINTK("DMA at end: %d\n",j);
|
|
/* store frame */
|
|
writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) |
|
|
(aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) |
|
|
(tx->resolution << MID_SEG_RATE_SHIFT) |
|
|
(size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4);
|
|
/*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/
|
|
writel((vcc->vci << MID_SEG_VCI_SHIFT) |
|
|
(aal5 ? 0 : (skb_data3 & 0xf)) |
|
|
(ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0),
|
|
tx->send+((tx->tx_pos+1) & (tx->words-1))*4);
|
|
DPRINTK("size: %d, len:%d\n",size,skb->len);
|
|
if (aal5)
|
|
writel(skb->len,tx->send+
|
|
((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4);
|
|
j = j >> 1;
|
|
for (i = 0; i < j; i++) {
|
|
writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8);
|
|
writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4);
|
|
dma_wr = (dma_wr+1) & (NR_DMA_TX-1);
|
|
}
|
|
ENI_PRV_POS(skb) = tx->tx_pos;
|
|
ENI_PRV_SIZE(skb) = size;
|
|
ENI_VCC(vcc)->txing += size;
|
|
tx->tx_pos = (tx->tx_pos+size) & (tx->words-1);
|
|
DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos);
|
|
eni_out(dma_wr,MID_DMA_WR_TX);
|
|
skb_queue_tail(&eni_dev->tx_queue,skb);
|
|
queued++;
|
|
return enq_ok;
|
|
}
|
|
|
|
|
|
static void poll_tx(struct atm_dev *dev)
|
|
{
|
|
struct eni_tx *tx;
|
|
struct sk_buff *skb;
|
|
enum enq_res res;
|
|
int i;
|
|
|
|
DPRINTK(">poll_tx\n");
|
|
for (i = NR_CHAN-1; i >= 0; i--) {
|
|
tx = &ENI_DEV(dev)->tx[i];
|
|
if (tx->send)
|
|
while ((skb = skb_dequeue(&tx->backlog))) {
|
|
res = do_tx(skb);
|
|
if (res == enq_ok) continue;
|
|
DPRINTK("re-queuing TX PDU\n");
|
|
skb_queue_head(&tx->backlog,skb);
|
|
requeued++;
|
|
if (res == enq_jam) return;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static void dequeue_tx(struct atm_dev *dev)
|
|
{
|
|
struct eni_dev *eni_dev;
|
|
struct atm_vcc *vcc;
|
|
struct sk_buff *skb;
|
|
struct eni_tx *tx;
|
|
|
|
NULLCHECK(dev);
|
|
eni_dev = ENI_DEV(dev);
|
|
NULLCHECK(eni_dev);
|
|
while ((skb = skb_dequeue(&eni_dev->tx_queue))) {
|
|
vcc = ATM_SKB(skb)->vcc;
|
|
NULLCHECK(vcc);
|
|
tx = ENI_VCC(vcc)->tx;
|
|
NULLCHECK(ENI_VCC(vcc)->tx);
|
|
DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb),
|
|
(unsigned) eni_in(MID_TX_DESCRSTART(tx->index)));
|
|
if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) ==
|
|
eni_in(MID_TX_DESCRSTART(tx->index))) {
|
|
skb_queue_head(&eni_dev->tx_queue,skb);
|
|
break;
|
|
}
|
|
ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb);
|
|
dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len,
|
|
DMA_TO_DEVICE);
|
|
if (vcc->pop) vcc->pop(vcc,skb);
|
|
else dev_kfree_skb_irq(skb);
|
|
atomic_inc(&vcc->stats->tx);
|
|
wake_up(&eni_dev->tx_wait);
|
|
dma_complete++;
|
|
}
|
|
}
|
|
|
|
|
|
static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr)
|
|
{
|
|
int i;
|
|
|
|
for (i = !ubr; i < NR_CHAN; i++)
|
|
if (!eni_dev->tx[i].send) return eni_dev->tx+i;
|
|
return NULL;
|
|
}
|
|
|
|
|
|
static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre,
|
|
int *res,int unlimited)
|
|
{
|
|
static const int pre_div[] = { 4,16,128,2048 };
|
|
/* 2^(((x+2)^2-(x+2))/2+1) */
|
|
|
|
if (unlimited) *pre = *res = 0;
|
|
else {
|
|
if (*pcr > 0) {
|
|
int div;
|
|
|
|
for (*pre = 0; *pre < 3; (*pre)++)
|
|
if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break;
|
|
div = pre_div[*pre]**pcr;
|
|
DPRINTK("min div %d\n",div);
|
|
*res = TS_CLOCK/div-1;
|
|
}
|
|
else {
|
|
int div;
|
|
|
|
if (!*pcr) *pcr = eni_dev->tx_bw+reserved;
|
|
for (*pre = 3; *pre >= 0; (*pre)--)
|
|
if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break;
|
|
if (*pre < 3) (*pre)++; /* else fail later */
|
|
div = pre_div[*pre]*-*pcr;
|
|
DPRINTK("max div %d\n",div);
|
|
*res = DIV_ROUND_UP(TS_CLOCK, div)-1;
|
|
}
|
|
if (*res < 0) *res = 0;
|
|
if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE;
|
|
}
|
|
*pcr = TS_CLOCK/pre_div[*pre]/(*res+1);
|
|
DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp,
|
|
int set_rsv,int set_shp)
|
|
{
|
|
struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
|
|
struct eni_vcc *eni_vcc = ENI_VCC(vcc);
|
|
struct eni_tx *tx;
|
|
unsigned long size;
|
|
void __iomem *mem;
|
|
int rate,ubr,unlimited,new_tx;
|
|
int pre,res,order;
|
|
int error;
|
|
|
|
rate = atm_pcr_goal(txtp);
|
|
ubr = txtp->traffic_class == ATM_UBR;
|
|
unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR ||
|
|
rate >= ATM_OC3_PCR);
|
|
if (!unlimited) {
|
|
size = txtp->max_sdu*eni_dev->tx_mult/100;
|
|
if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <=
|
|
MID_MAX_BUF_SIZE)
|
|
size = MID_MAX_BUF_SIZE;
|
|
}
|
|
else {
|
|
if (eni_dev->ubr) {
|
|
eni_vcc->tx = eni_dev->ubr;
|
|
txtp->pcr = ATM_OC3_PCR;
|
|
return 0;
|
|
}
|
|
size = UBR_BUFFER;
|
|
}
|
|
new_tx = !eni_vcc->tx;
|
|
mem = NULL; /* for gcc */
|
|
if (!new_tx) tx = eni_vcc->tx;
|
|
else {
|
|
mem = eni_alloc_mem(eni_dev,&size);
|
|
if (!mem) return -ENOBUFS;
|
|
tx = alloc_tx(eni_dev,unlimited);
|
|
if (!tx) {
|
|
eni_free_mem(eni_dev,mem,size);
|
|
return -EBUSY;
|
|
}
|
|
DPRINTK("got chan %d\n",tx->index);
|
|
tx->reserved = tx->shaping = 0;
|
|
tx->send = mem;
|
|
tx->words = size >> 2;
|
|
skb_queue_head_init(&tx->backlog);
|
|
for (order = 0; size > (1 << (order+10)); order++);
|
|
eni_out((order << MID_SIZE_SHIFT) |
|
|
((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)),
|
|
MID_TX_PLACE(tx->index));
|
|
tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) &
|
|
MID_DESCR_START;
|
|
}
|
|
error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited);
|
|
if (!error && txtp->min_pcr > rate) error = -EINVAL;
|
|
if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR &&
|
|
txtp->max_pcr < rate) error = -EINVAL;
|
|
if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved)
|
|
error = -EINVAL;
|
|
if (!error && set_rsv && !set_shp && rate < tx->shaping)
|
|
error = -EINVAL;
|
|
if (!error && !set_rsv && rate > tx->reserved && !ubr)
|
|
error = -EINVAL;
|
|
if (error) {
|
|
if (new_tx) {
|
|
tx->send = NULL;
|
|
eni_free_mem(eni_dev,mem,size);
|
|
}
|
|
return error;
|
|
}
|
|
txtp->pcr = rate;
|
|
if (set_rsv && !ubr) {
|
|
eni_dev->tx_bw += tx->reserved;
|
|
tx->reserved = rate;
|
|
eni_dev->tx_bw -= rate;
|
|
}
|
|
if (set_shp || (unlimited && new_tx)) {
|
|
if (unlimited && new_tx) eni_dev->ubr = tx;
|
|
tx->prescaler = pre;
|
|
tx->resolution = res;
|
|
tx->shaping = rate;
|
|
}
|
|
if (set_shp) eni_vcc->tx = tx;
|
|
DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int open_tx_first(struct atm_vcc *vcc)
|
|
{
|
|
ENI_VCC(vcc)->tx = NULL;
|
|
if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0;
|
|
ENI_VCC(vcc)->txing = 0;
|
|
return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1);
|
|
}
|
|
|
|
|
|
static int open_tx_second(struct atm_vcc *vcc)
|
|
{
|
|
return 0; /* nothing to do */
|
|
}
|
|
|
|
|
|
static void close_tx(struct atm_vcc *vcc)
|
|
{
|
|
DECLARE_WAITQUEUE(wait,current);
|
|
struct eni_dev *eni_dev;
|
|
struct eni_vcc *eni_vcc;
|
|
|
|
eni_vcc = ENI_VCC(vcc);
|
|
if (!eni_vcc->tx) return;
|
|
eni_dev = ENI_DEV(vcc->dev);
|
|
/* wait for TX queue to drain */
|
|
DPRINTK("eni_close: waiting for TX ...\n");
|
|
add_wait_queue(&eni_dev->tx_wait,&wait);
|
|
set_current_state(TASK_UNINTERRUPTIBLE);
|
|
for (;;) {
|
|
int txing;
|
|
|
|
tasklet_disable(&eni_dev->task);
|
|
txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing;
|
|
tasklet_enable(&eni_dev->task);
|
|
if (!txing) break;
|
|
DPRINTK("%d TX left\n",eni_vcc->txing);
|
|
schedule();
|
|
set_current_state(TASK_UNINTERRUPTIBLE);
|
|
}
|
|
set_current_state(TASK_RUNNING);
|
|
remove_wait_queue(&eni_dev->tx_wait,&wait);
|
|
if (eni_vcc->tx != eni_dev->ubr) {
|
|
/*
|
|
* Looping a few times in here is probably far cheaper than
|
|
* keeping track of TX completions all the time, so let's poll
|
|
* a bit ...
|
|
*/
|
|
while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) !=
|
|
eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index)))
|
|
schedule();
|
|
eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2);
|
|
eni_vcc->tx->send = NULL;
|
|
eni_dev->tx_bw += eni_vcc->tx->reserved;
|
|
}
|
|
eni_vcc->tx = NULL;
|
|
}
|
|
|
|
|
|
static int start_tx(struct atm_dev *dev)
|
|
{
|
|
struct eni_dev *eni_dev;
|
|
int i;
|
|
|
|
eni_dev = ENI_DEV(dev);
|
|
eni_dev->lost = 0;
|
|
eni_dev->tx_bw = ATM_OC3_PCR;
|
|
eni_dev->tx_mult = DEFAULT_TX_MULT;
|
|
init_waitqueue_head(&eni_dev->tx_wait);
|
|
eni_dev->ubr = NULL;
|
|
skb_queue_head_init(&eni_dev->tx_queue);
|
|
eni_out(0,MID_DMA_WR_TX);
|
|
for (i = 0; i < NR_CHAN; i++) {
|
|
eni_dev->tx[i].send = NULL;
|
|
eni_dev->tx[i].index = i;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*--------------------------------- common ----------------------------------*/
|
|
|
|
|
|
#if 0 /* may become useful again when tuning things */
|
|
|
|
static void foo(void)
|
|
{
|
|
printk(KERN_INFO
|
|
"tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n"
|
|
"backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n",
|
|
tx_complete,dma_complete,queued,requeued,submitted,backlogged,
|
|
rx_enqueued,rx_dequeued,putting,pushed);
|
|
if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost);
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
static void bug_int(struct atm_dev *dev,unsigned long reason)
|
|
{
|
|
DPRINTK(">bug_int\n");
|
|
if (reason & MID_DMA_ERR_ACK)
|
|
printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
|
|
"error\n",dev->number);
|
|
if (reason & MID_TX_IDENT_MISM)
|
|
printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident "
|
|
"mismatch\n",dev->number);
|
|
if (reason & MID_TX_DMA_OVFL)
|
|
printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
|
|
"overflow\n",dev->number);
|
|
EVENT("---dump ends here---\n",0,0);
|
|
printk(KERN_NOTICE "---recent events---\n");
|
|
event_dump();
|
|
}
|
|
|
|
|
|
static irqreturn_t eni_int(int irq,void *dev_id)
|
|
{
|
|
struct atm_dev *dev;
|
|
struct eni_dev *eni_dev;
|
|
u32 reason;
|
|
|
|
DPRINTK(">eni_int\n");
|
|
dev = dev_id;
|
|
eni_dev = ENI_DEV(dev);
|
|
reason = eni_in(MID_ISA);
|
|
DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason);
|
|
/*
|
|
* Must handle these two right now, because reading ISA doesn't clear
|
|
* them, so they re-occur and we never make it to the tasklet. Since
|
|
* they're rare, we don't mind the occasional invocation of eni_tasklet
|
|
* with eni_dev->events == 0.
|
|
*/
|
|
if (reason & MID_STAT_OVFL) {
|
|
EVENT("stat overflow\n",0,0);
|
|
eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH;
|
|
}
|
|
if (reason & MID_SUNI_INT) {
|
|
EVENT("SUNI int\n",0,0);
|
|
dev->phy->interrupt(dev);
|
|
#if 0
|
|
foo();
|
|
#endif
|
|
}
|
|
spin_lock(&eni_dev->lock);
|
|
eni_dev->events |= reason;
|
|
spin_unlock(&eni_dev->lock);
|
|
tasklet_schedule(&eni_dev->task);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
|
|
static void eni_tasklet(unsigned long data)
|
|
{
|
|
struct atm_dev *dev = (struct atm_dev *) data;
|
|
struct eni_dev *eni_dev = ENI_DEV(dev);
|
|
unsigned long flags;
|
|
u32 events;
|
|
|
|
DPRINTK("eni_tasklet (dev %p)\n",dev);
|
|
spin_lock_irqsave(&eni_dev->lock,flags);
|
|
events = xchg(&eni_dev->events,0);
|
|
spin_unlock_irqrestore(&eni_dev->lock,flags);
|
|
if (events & MID_RX_DMA_COMPLETE) {
|
|
EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0);
|
|
dequeue_rx(dev);
|
|
EVENT("dequeue_rx done, starting poll_rx\n",0,0);
|
|
poll_rx(dev);
|
|
EVENT("poll_rx done\n",0,0);
|
|
/* poll_tx ? */
|
|
}
|
|
if (events & MID_SERVICE) {
|
|
EVENT("INT: service, starting get_service\n",0,0);
|
|
get_service(dev);
|
|
EVENT("get_service done, starting poll_rx\n",0,0);
|
|
poll_rx(dev);
|
|
EVENT("poll_rx done\n",0,0);
|
|
}
|
|
if (events & MID_TX_DMA_COMPLETE) {
|
|
EVENT("INT: TX DMA COMPLETE\n",0,0);
|
|
dequeue_tx(dev);
|
|
}
|
|
if (events & MID_TX_COMPLETE) {
|
|
EVENT("INT: TX COMPLETE\n",0,0);
|
|
tx_complete++;
|
|
wake_up(&eni_dev->tx_wait);
|
|
/* poll_rx ? */
|
|
}
|
|
if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) {
|
|
EVENT("bug interrupt\n",0,0);
|
|
bug_int(dev,events);
|
|
}
|
|
poll_tx(dev);
|
|
}
|
|
|
|
|
|
/*--------------------------------- entries ---------------------------------*/
|
|
|
|
|
|
static char * const media_name[] = {
|
|
"MMF", "SMF", "MMF", "03?", /* 0- 3 */
|
|
"UTP", "05?", "06?", "07?", /* 4- 7 */
|
|
"TAXI","09?", "10?", "11?", /* 8-11 */
|
|
"12?", "13?", "14?", "15?", /* 12-15 */
|
|
"MMF", "SMF", "18?", "19?", /* 16-19 */
|
|
"UTP", "21?", "22?", "23?", /* 20-23 */
|
|
"24?", "25?", "26?", "27?", /* 24-27 */
|
|
"28?", "29?", "30?", "31?" /* 28-31 */
|
|
};
|
|
|
|
|
|
#define SET_SEPROM \
|
|
({ if (!error && !pci_error) { \
|
|
pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \
|
|
udelay(10); /* 10 usecs */ \
|
|
} })
|
|
#define GET_SEPROM \
|
|
({ if (!error && !pci_error) { \
|
|
pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \
|
|
udelay(10); /* 10 usecs */ \
|
|
} })
|
|
|
|
|
|
static int get_esi_asic(struct atm_dev *dev)
|
|
{
|
|
struct eni_dev *eni_dev;
|
|
unsigned char tonga;
|
|
int error,failed,pci_error;
|
|
int address,i,j;
|
|
|
|
eni_dev = ENI_DEV(dev);
|
|
error = pci_error = 0;
|
|
tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK;
|
|
SET_SEPROM;
|
|
for (i = 0; i < ESI_LEN && !error && !pci_error; i++) {
|
|
/* start operation */
|
|
tonga |= SEPROM_DATA;
|
|
SET_SEPROM;
|
|
tonga |= SEPROM_CLK;
|
|
SET_SEPROM;
|
|
tonga &= ~SEPROM_DATA;
|
|
SET_SEPROM;
|
|
tonga &= ~SEPROM_CLK;
|
|
SET_SEPROM;
|
|
/* send address */
|
|
address = ((i+SEPROM_ESI_BASE) << 1)+1;
|
|
for (j = 7; j >= 0; j--) {
|
|
tonga = (address >> j) & 1 ? tonga | SEPROM_DATA :
|
|
tonga & ~SEPROM_DATA;
|
|
SET_SEPROM;
|
|
tonga |= SEPROM_CLK;
|
|
SET_SEPROM;
|
|
tonga &= ~SEPROM_CLK;
|
|
SET_SEPROM;
|
|
}
|
|
/* get ack */
|
|
tonga |= SEPROM_DATA;
|
|
SET_SEPROM;
|
|
tonga |= SEPROM_CLK;
|
|
SET_SEPROM;
|
|
GET_SEPROM;
|
|
failed = tonga & SEPROM_DATA;
|
|
tonga &= ~SEPROM_CLK;
|
|
SET_SEPROM;
|
|
tonga |= SEPROM_DATA;
|
|
SET_SEPROM;
|
|
if (failed) error = -EIO;
|
|
else {
|
|
dev->esi[i] = 0;
|
|
for (j = 7; j >= 0; j--) {
|
|
dev->esi[i] <<= 1;
|
|
tonga |= SEPROM_DATA;
|
|
SET_SEPROM;
|
|
tonga |= SEPROM_CLK;
|
|
SET_SEPROM;
|
|
GET_SEPROM;
|
|
if (tonga & SEPROM_DATA) dev->esi[i] |= 1;
|
|
tonga &= ~SEPROM_CLK;
|
|
SET_SEPROM;
|
|
tonga |= SEPROM_DATA;
|
|
SET_SEPROM;
|
|
}
|
|
/* get ack */
|
|
tonga |= SEPROM_DATA;
|
|
SET_SEPROM;
|
|
tonga |= SEPROM_CLK;
|
|
SET_SEPROM;
|
|
GET_SEPROM;
|
|
if (!(tonga & SEPROM_DATA)) error = -EIO;
|
|
tonga &= ~SEPROM_CLK;
|
|
SET_SEPROM;
|
|
tonga |= SEPROM_DATA;
|
|
SET_SEPROM;
|
|
}
|
|
/* stop operation */
|
|
tonga &= ~SEPROM_DATA;
|
|
SET_SEPROM;
|
|
tonga |= SEPROM_CLK;
|
|
SET_SEPROM;
|
|
tonga |= SEPROM_DATA;
|
|
SET_SEPROM;
|
|
}
|
|
if (pci_error) {
|
|
printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI "
|
|
"(0x%02x)\n",dev->number,pci_error);
|
|
error = -EIO;
|
|
}
|
|
return error;
|
|
}
|
|
|
|
|
|
#undef SET_SEPROM
|
|
#undef GET_SEPROM
|
|
|
|
|
|
static int get_esi_fpga(struct atm_dev *dev, void __iomem *base)
|
|
{
|
|
void __iomem *mac_base;
|
|
int i;
|
|
|
|
mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom);
|
|
for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3));
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int eni_do_init(struct atm_dev *dev)
|
|
{
|
|
struct midway_eprom __iomem *eprom;
|
|
struct eni_dev *eni_dev;
|
|
struct pci_dev *pci_dev;
|
|
unsigned long real_base;
|
|
void __iomem *base;
|
|
int error,i,last;
|
|
|
|
DPRINTK(">eni_init\n");
|
|
dev->ci_range.vpi_bits = 0;
|
|
dev->ci_range.vci_bits = NR_VCI_LD;
|
|
dev->link_rate = ATM_OC3_PCR;
|
|
eni_dev = ENI_DEV(dev);
|
|
pci_dev = eni_dev->pci_dev;
|
|
real_base = pci_resource_start(pci_dev, 0);
|
|
eni_dev->irq = pci_dev->irq;
|
|
if ((error = pci_write_config_word(pci_dev,PCI_COMMAND,
|
|
PCI_COMMAND_MEMORY |
|
|
(eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
|
|
printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory "
|
|
"(0x%02x)\n",dev->number,error);
|
|
return -EIO;
|
|
}
|
|
printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,",
|
|
dev->number,pci_dev->revision,real_base,eni_dev->irq);
|
|
if (!(base = ioremap(real_base,MAP_MAX_SIZE))) {
|
|
printk("\n");
|
|
printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page "
|
|
"mapping\n",dev->number);
|
|
return -ENOMEM;
|
|
}
|
|
eni_dev->ioaddr = base;
|
|
eni_dev->base_diff = real_base - (unsigned long) base;
|
|
/* id may not be present in ASIC Tonga boards - check this @@@ */
|
|
if (!eni_dev->asic) {
|
|
eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom));
|
|
if (readl(&eprom->magic) != ENI155_MAGIC) {
|
|
printk("\n");
|
|
printk(KERN_ERR DEV_LABEL
|
|
"(itf %d): bad magic - expected 0x%x, got 0x%x\n",
|
|
dev->number, ENI155_MAGIC,
|
|
(unsigned)readl(&eprom->magic));
|
|
error = -EINVAL;
|
|
goto unmap;
|
|
}
|
|
}
|
|
eni_dev->phy = base+PHY_BASE;
|
|
eni_dev->reg = base+REG_BASE;
|
|
eni_dev->ram = base+RAM_BASE;
|
|
last = MAP_MAX_SIZE-RAM_BASE;
|
|
for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) {
|
|
writel(0x55555555,eni_dev->ram+i);
|
|
if (readl(eni_dev->ram+i) != 0x55555555) last = i;
|
|
else {
|
|
writel(0xAAAAAAAA,eni_dev->ram+i);
|
|
if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i;
|
|
else writel(i,eni_dev->ram+i);
|
|
}
|
|
}
|
|
for (i = 0; i < last; i += RAM_INCREMENT)
|
|
if (readl(eni_dev->ram+i) != i) break;
|
|
eni_dev->mem = i;
|
|
memset_io(eni_dev->ram,0,eni_dev->mem);
|
|
/* TODO: should shrink allocation now */
|
|
printk("mem=%dkB (",eni_dev->mem >> 10);
|
|
/* TODO: check for non-SUNI, check for TAXI ? */
|
|
if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) {
|
|
printk(")\n");
|
|
printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n",
|
|
dev->number,(unsigned) eni_in(MID_RES_ID_MCON));
|
|
error = -EINVAL;
|
|
goto unmap;
|
|
}
|
|
error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base);
|
|
if (error)
|
|
goto unmap;
|
|
for (i = 0; i < ESI_LEN; i++)
|
|
printk("%s%02X",i ? "-" : "",dev->esi[i]);
|
|
printk(")\n");
|
|
printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number,
|
|
eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA",
|
|
media_name[eni_in(MID_RES_ID_MCON) & DAUGHTER_ID]);
|
|
|
|
error = suni_init(dev);
|
|
if (error)
|
|
goto unmap;
|
|
out:
|
|
return error;
|
|
unmap:
|
|
iounmap(base);
|
|
goto out;
|
|
}
|
|
|
|
static void eni_do_release(struct atm_dev *dev)
|
|
{
|
|
struct eni_dev *ed = ENI_DEV(dev);
|
|
|
|
dev->phy->stop(dev);
|
|
dev->phy = NULL;
|
|
iounmap(ed->ioaddr);
|
|
}
|
|
|
|
static int eni_start(struct atm_dev *dev)
|
|
{
|
|
struct eni_dev *eni_dev;
|
|
|
|
void __iomem *buf;
|
|
unsigned long buffer_mem;
|
|
int error;
|
|
|
|
DPRINTK(">eni_start\n");
|
|
eni_dev = ENI_DEV(dev);
|
|
if (request_irq(eni_dev->irq,&eni_int,IRQF_SHARED,DEV_LABEL,dev)) {
|
|
printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n",
|
|
dev->number,eni_dev->irq);
|
|
error = -EAGAIN;
|
|
goto out;
|
|
}
|
|
pci_set_master(eni_dev->pci_dev);
|
|
if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND,
|
|
PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
|
|
(eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
|
|
printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+"
|
|
"master (0x%02x)\n",dev->number,error);
|
|
goto free_irq;
|
|
}
|
|
if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,
|
|
END_SWAP_DMA))) {
|
|
printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap "
|
|
"(0x%02x)\n",dev->number,error);
|
|
goto free_irq;
|
|
}
|
|
/* determine addresses of internal tables */
|
|
eni_dev->vci = eni_dev->ram;
|
|
eni_dev->rx_dma = eni_dev->ram+NR_VCI*16;
|
|
eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8;
|
|
eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8;
|
|
buf = eni_dev->service+NR_SERVICE*4;
|
|
DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n",
|
|
eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma,
|
|
eni_dev->service,buf);
|
|
spin_lock_init(&eni_dev->lock);
|
|
tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev);
|
|
eni_dev->events = 0;
|
|
/* initialize memory management */
|
|
buffer_mem = eni_dev->mem - (buf - eni_dev->ram);
|
|
eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2;
|
|
eni_dev->free_list = kmalloc_array(eni_dev->free_list_size + 1,
|
|
sizeof(*eni_dev->free_list),
|
|
GFP_KERNEL);
|
|
if (!eni_dev->free_list) {
|
|
printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
|
|
dev->number);
|
|
error = -ENOMEM;
|
|
goto free_irq;
|
|
}
|
|
eni_dev->free_len = 0;
|
|
eni_put_free(eni_dev,buf,buffer_mem);
|
|
memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */
|
|
/*
|
|
* byte_addr free (k)
|
|
* 0x00000000 512 VCI table
|
|
* 0x00004000 496 RX DMA
|
|
* 0x00005000 492 TX DMA
|
|
* 0x00006000 488 service list
|
|
* 0x00007000 484 buffers
|
|
* 0x00080000 0 end (512kB)
|
|
*/
|
|
eni_out(0xffffffff,MID_IE);
|
|
error = start_tx(dev);
|
|
if (error) goto free_list;
|
|
error = start_rx(dev);
|
|
if (error) goto free_list;
|
|
error = dev->phy->start(dev);
|
|
if (error) goto free_list;
|
|
eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) |
|
|
MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE,
|
|
MID_MC_S);
|
|
/* Tonga uses SBus INTReq1 */
|
|
(void) eni_in(MID_ISA); /* clear Midway interrupts */
|
|
return 0;
|
|
|
|
free_list:
|
|
kfree(eni_dev->free_list);
|
|
|
|
free_irq:
|
|
free_irq(eni_dev->irq, dev);
|
|
|
|
out:
|
|
return error;
|
|
}
|
|
|
|
|
|
static void eni_close(struct atm_vcc *vcc)
|
|
{
|
|
DPRINTK(">eni_close\n");
|
|
if (!ENI_VCC(vcc)) return;
|
|
clear_bit(ATM_VF_READY,&vcc->flags);
|
|
close_rx(vcc);
|
|
close_tx(vcc);
|
|
DPRINTK("eni_close: done waiting\n");
|
|
/* deallocate memory */
|
|
kfree(ENI_VCC(vcc));
|
|
vcc->dev_data = NULL;
|
|
clear_bit(ATM_VF_ADDR,&vcc->flags);
|
|
/*foo();*/
|
|
}
|
|
|
|
|
|
static int eni_open(struct atm_vcc *vcc)
|
|
{
|
|
struct eni_vcc *eni_vcc;
|
|
int error;
|
|
short vpi = vcc->vpi;
|
|
int vci = vcc->vci;
|
|
|
|
DPRINTK(">eni_open\n");
|
|
EVENT("eni_open\n",0,0);
|
|
if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
|
|
vcc->dev_data = NULL;
|
|
if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
|
|
set_bit(ATM_VF_ADDR,&vcc->flags);
|
|
if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5)
|
|
return -EINVAL;
|
|
DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi,
|
|
vcc->vci);
|
|
if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) {
|
|
eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL);
|
|
if (!eni_vcc) return -ENOMEM;
|
|
vcc->dev_data = eni_vcc;
|
|
eni_vcc->tx = NULL; /* for eni_close after open_rx */
|
|
if ((error = open_rx_first(vcc))) {
|
|
eni_close(vcc);
|
|
return error;
|
|
}
|
|
if ((error = open_tx_first(vcc))) {
|
|
eni_close(vcc);
|
|
return error;
|
|
}
|
|
}
|
|
if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0;
|
|
if ((error = open_rx_second(vcc))) {
|
|
eni_close(vcc);
|
|
return error;
|
|
}
|
|
if ((error = open_tx_second(vcc))) {
|
|
eni_close(vcc);
|
|
return error;
|
|
}
|
|
set_bit(ATM_VF_READY,&vcc->flags);
|
|
/* should power down SUNI while !ref_count @@@ */
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs)
|
|
{
|
|
struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
|
|
struct eni_tx *tx = ENI_VCC(vcc)->tx;
|
|
struct sk_buff *skb;
|
|
int error,rate,rsv,shp;
|
|
|
|
if (qos->txtp.traffic_class == ATM_NONE) return 0;
|
|
if (tx == eni_dev->ubr) return -EBADFD;
|
|
rate = atm_pcr_goal(&qos->txtp);
|
|
if (rate < 0) rate = -rate;
|
|
rsv = shp = 0;
|
|
if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1;
|
|
if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1;
|
|
if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1;
|
|
if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1;
|
|
if (!rsv && !shp) return 0;
|
|
error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp);
|
|
if (error) return error;
|
|
if (shp && !(flgs & ATM_MF_IMMED)) return 0;
|
|
/*
|
|
* Walk through the send buffer and patch the rate information in all
|
|
* segmentation buffer descriptors of this VCC.
|
|
*/
|
|
tasklet_disable(&eni_dev->task);
|
|
skb_queue_walk(&eni_dev->tx_queue, skb) {
|
|
void __iomem *dsc;
|
|
|
|
if (ATM_SKB(skb)->vcc != vcc) continue;
|
|
dsc = tx->send+ENI_PRV_POS(skb)*4;
|
|
writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) |
|
|
(tx->prescaler << MID_SEG_PR_SHIFT) |
|
|
(tx->resolution << MID_SEG_RATE_SHIFT), dsc);
|
|
}
|
|
tasklet_enable(&eni_dev->task);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
|
|
{
|
|
struct eni_dev *eni_dev = ENI_DEV(dev);
|
|
|
|
if (cmd == ENI_MEMDUMP) {
|
|
if (!capable(CAP_NET_ADMIN)) return -EPERM;
|
|
printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d "
|
|
"instead of obsolete ioctl ENI_MEMDUMP\n",dev->number);
|
|
dump(dev);
|
|
return 0;
|
|
}
|
|
if (cmd == ENI_SETMULT) {
|
|
struct eni_multipliers mult;
|
|
|
|
if (!capable(CAP_NET_ADMIN)) return -EPERM;
|
|
if (copy_from_user(&mult, arg,
|
|
sizeof(struct eni_multipliers)))
|
|
return -EFAULT;
|
|
if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) ||
|
|
mult.tx > 65536 || mult.rx > 65536)
|
|
return -EINVAL;
|
|
if (mult.tx) eni_dev->tx_mult = mult.tx;
|
|
if (mult.rx) eni_dev->rx_mult = mult.rx;
|
|
return 0;
|
|
}
|
|
if (cmd == ATM_SETCIRANGE) {
|
|
struct atm_cirange ci;
|
|
|
|
if (copy_from_user(&ci, arg,sizeof(struct atm_cirange)))
|
|
return -EFAULT;
|
|
if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) &&
|
|
(ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX))
|
|
return 0;
|
|
return -EINVAL;
|
|
}
|
|
if (!dev->phy->ioctl) return -ENOIOCTLCMD;
|
|
return dev->phy->ioctl(dev,cmd,arg);
|
|
}
|
|
|
|
static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb)
|
|
{
|
|
enum enq_res res;
|
|
|
|
DPRINTK(">eni_send\n");
|
|
if (!ENI_VCC(vcc)->tx) {
|
|
if (vcc->pop) vcc->pop(vcc,skb);
|
|
else dev_kfree_skb(skb);
|
|
return -EINVAL;
|
|
}
|
|
if (!skb) {
|
|
printk(KERN_CRIT "!skb in eni_send ?\n");
|
|
if (vcc->pop) vcc->pop(vcc,skb);
|
|
return -EINVAL;
|
|
}
|
|
if (vcc->qos.aal == ATM_AAL0) {
|
|
if (skb->len != ATM_CELL_SIZE-1) {
|
|
if (vcc->pop) vcc->pop(vcc,skb);
|
|
else dev_kfree_skb(skb);
|
|
return -EINVAL;
|
|
}
|
|
*(u32 *) skb->data = htonl(*(u32 *) skb->data);
|
|
}
|
|
submitted++;
|
|
ATM_SKB(skb)->vcc = vcc;
|
|
tasklet_disable(&ENI_DEV(vcc->dev)->task);
|
|
res = do_tx(skb);
|
|
tasklet_enable(&ENI_DEV(vcc->dev)->task);
|
|
if (res == enq_ok) return 0;
|
|
skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb);
|
|
backlogged++;
|
|
tasklet_schedule(&ENI_DEV(vcc->dev)->task);
|
|
return 0;
|
|
}
|
|
|
|
static void eni_phy_put(struct atm_dev *dev,unsigned char value,
|
|
unsigned long addr)
|
|
{
|
|
writel(value,ENI_DEV(dev)->phy+addr*4);
|
|
}
|
|
|
|
|
|
|
|
static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr)
|
|
{
|
|
return readl(ENI_DEV(dev)->phy+addr*4);
|
|
}
|
|
|
|
|
|
static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page)
|
|
{
|
|
struct sock *s;
|
|
static const char *signal[] = { "LOST","unknown","okay" };
|
|
struct eni_dev *eni_dev = ENI_DEV(dev);
|
|
struct atm_vcc *vcc;
|
|
int left,i;
|
|
|
|
left = *pos;
|
|
if (!left)
|
|
return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, "
|
|
"%d cps remaining\n",dev->number,signal[(int) dev->signal],
|
|
eni_dev->mem >> 10,eni_dev->tx_bw);
|
|
if (!--left)
|
|
return sprintf(page,"%4sBursts: TX"
|
|
#if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \
|
|
!defined(CONFIG_ATM_ENI_BURST_TX_8W) && \
|
|
!defined(CONFIG_ATM_ENI_BURST_TX_4W) && \
|
|
!defined(CONFIG_ATM_ENI_BURST_TX_2W)
|
|
" none"
|
|
#endif
|
|
#ifdef CONFIG_ATM_ENI_BURST_TX_16W
|
|
" 16W"
|
|
#endif
|
|
#ifdef CONFIG_ATM_ENI_BURST_TX_8W
|
|
" 8W"
|
|
#endif
|
|
#ifdef CONFIG_ATM_ENI_BURST_TX_4W
|
|
" 4W"
|
|
#endif
|
|
#ifdef CONFIG_ATM_ENI_BURST_TX_2W
|
|
" 2W"
|
|
#endif
|
|
", RX"
|
|
#if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \
|
|
!defined(CONFIG_ATM_ENI_BURST_RX_8W) && \
|
|
!defined(CONFIG_ATM_ENI_BURST_RX_4W) && \
|
|
!defined(CONFIG_ATM_ENI_BURST_RX_2W)
|
|
" none"
|
|
#endif
|
|
#ifdef CONFIG_ATM_ENI_BURST_RX_16W
|
|
" 16W"
|
|
#endif
|
|
#ifdef CONFIG_ATM_ENI_BURST_RX_8W
|
|
" 8W"
|
|
#endif
|
|
#ifdef CONFIG_ATM_ENI_BURST_RX_4W
|
|
" 4W"
|
|
#endif
|
|
#ifdef CONFIG_ATM_ENI_BURST_RX_2W
|
|
" 2W"
|
|
#endif
|
|
#ifndef CONFIG_ATM_ENI_TUNE_BURST
|
|
" (default)"
|
|
#endif
|
|
"\n","");
|
|
if (!--left)
|
|
return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n",
|
|
"",eni_dev->tx_mult,eni_dev->rx_mult);
|
|
for (i = 0; i < NR_CHAN; i++) {
|
|
struct eni_tx *tx = eni_dev->tx+i;
|
|
|
|
if (!tx->send) continue;
|
|
if (!--left) {
|
|
return sprintf(page, "tx[%d]: 0x%lx-0x%lx "
|
|
"(%6ld bytes), rsv %d cps, shp %d cps%s\n",i,
|
|
(unsigned long) (tx->send - eni_dev->ram),
|
|
tx->send-eni_dev->ram+tx->words*4-1,tx->words*4,
|
|
tx->reserved,tx->shaping,
|
|
tx == eni_dev->ubr ? " (UBR)" : "");
|
|
}
|
|
if (--left) continue;
|
|
return sprintf(page,"%10sbacklog %u packets\n","",
|
|
skb_queue_len(&tx->backlog));
|
|
}
|
|
read_lock(&vcc_sklist_lock);
|
|
for(i = 0; i < VCC_HTABLE_SIZE; ++i) {
|
|
struct hlist_head *head = &vcc_hash[i];
|
|
|
|
sk_for_each(s, head) {
|
|
struct eni_vcc *eni_vcc;
|
|
int length;
|
|
|
|
vcc = atm_sk(s);
|
|
if (vcc->dev != dev)
|
|
continue;
|
|
eni_vcc = ENI_VCC(vcc);
|
|
if (--left) continue;
|
|
length = sprintf(page,"vcc %4d: ",vcc->vci);
|
|
if (eni_vcc->rx) {
|
|
length += sprintf(page+length, "0x%lx-0x%lx "
|
|
"(%6ld bytes)",
|
|
(unsigned long) (eni_vcc->recv - eni_dev->ram),
|
|
eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1,
|
|
eni_vcc->words*4);
|
|
if (eni_vcc->tx) length += sprintf(page+length,", ");
|
|
}
|
|
if (eni_vcc->tx)
|
|
length += sprintf(page+length,"tx[%d], txing %d bytes",
|
|
eni_vcc->tx->index,eni_vcc->txing);
|
|
page[length] = '\n';
|
|
read_unlock(&vcc_sklist_lock);
|
|
return length+1;
|
|
}
|
|
}
|
|
read_unlock(&vcc_sklist_lock);
|
|
for (i = 0; i < eni_dev->free_len; i++) {
|
|
struct eni_free *fe = eni_dev->free_list+i;
|
|
unsigned long offset;
|
|
|
|
if (--left) continue;
|
|
offset = (unsigned long) eni_dev->ram+eni_dev->base_diff;
|
|
return sprintf(page,"free %p-%p (%6d bytes)\n",
|
|
fe->start-offset,fe->start-offset+(1 << fe->order)-1,
|
|
1 << fe->order);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
static const struct atmdev_ops ops = {
|
|
.open = eni_open,
|
|
.close = eni_close,
|
|
.ioctl = eni_ioctl,
|
|
.send = eni_send,
|
|
.phy_put = eni_phy_put,
|
|
.phy_get = eni_phy_get,
|
|
.change_qos = eni_change_qos,
|
|
.proc_read = eni_proc_read
|
|
};
|
|
|
|
|
|
static int eni_init_one(struct pci_dev *pci_dev,
|
|
const struct pci_device_id *ent)
|
|
{
|
|
struct atm_dev *dev;
|
|
struct eni_dev *eni_dev;
|
|
struct eni_zero *zero;
|
|
int rc;
|
|
|
|
rc = pci_enable_device(pci_dev);
|
|
if (rc < 0)
|
|
goto out;
|
|
|
|
rc = dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(32));
|
|
if (rc < 0)
|
|
goto err_disable;
|
|
|
|
rc = -ENOMEM;
|
|
eni_dev = kmalloc(sizeof(struct eni_dev), GFP_KERNEL);
|
|
if (!eni_dev)
|
|
goto err_disable;
|
|
|
|
zero = &eni_dev->zero;
|
|
zero->addr = dma_alloc_coherent(&pci_dev->dev,
|
|
ENI_ZEROES_SIZE, &zero->dma, GFP_KERNEL);
|
|
if (!zero->addr)
|
|
goto err_kfree;
|
|
|
|
dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL);
|
|
if (!dev)
|
|
goto err_free_consistent;
|
|
|
|
dev->dev_data = eni_dev;
|
|
pci_set_drvdata(pci_dev, dev);
|
|
eni_dev->pci_dev = pci_dev;
|
|
eni_dev->asic = ent->driver_data;
|
|
|
|
rc = eni_do_init(dev);
|
|
if (rc < 0)
|
|
goto err_unregister;
|
|
|
|
rc = eni_start(dev);
|
|
if (rc < 0)
|
|
goto err_eni_release;
|
|
|
|
eni_dev->more = eni_boards;
|
|
eni_boards = dev;
|
|
out:
|
|
return rc;
|
|
|
|
err_eni_release:
|
|
dev->phy = NULL;
|
|
iounmap(ENI_DEV(dev)->ioaddr);
|
|
err_unregister:
|
|
atm_dev_deregister(dev);
|
|
err_free_consistent:
|
|
dma_free_coherent(&pci_dev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
|
|
err_kfree:
|
|
kfree(eni_dev);
|
|
err_disable:
|
|
pci_disable_device(pci_dev);
|
|
goto out;
|
|
}
|
|
|
|
|
|
static const struct pci_device_id eni_pci_tbl[] = {
|
|
{ PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_FPGA), 0 /* FPGA */ },
|
|
{ PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_ASIC), 1 /* ASIC */ },
|
|
{ 0, }
|
|
};
|
|
MODULE_DEVICE_TABLE(pci,eni_pci_tbl);
|
|
|
|
|
|
static void eni_remove_one(struct pci_dev *pdev)
|
|
{
|
|
struct atm_dev *dev = pci_get_drvdata(pdev);
|
|
struct eni_dev *ed = ENI_DEV(dev);
|
|
struct eni_zero *zero = &ed->zero;
|
|
|
|
eni_do_release(dev);
|
|
atm_dev_deregister(dev);
|
|
dma_free_coherent(&pdev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
|
|
kfree(ed);
|
|
pci_disable_device(pdev);
|
|
}
|
|
|
|
|
|
static struct pci_driver eni_driver = {
|
|
.name = DEV_LABEL,
|
|
.id_table = eni_pci_tbl,
|
|
.probe = eni_init_one,
|
|
.remove = eni_remove_one,
|
|
};
|
|
|
|
|
|
static int __init eni_init(void)
|
|
{
|
|
struct sk_buff *skb; /* dummy for sizeof */
|
|
|
|
BUILD_BUG_ON(sizeof(skb->cb) < sizeof(struct eni_skb_prv));
|
|
return pci_register_driver(&eni_driver);
|
|
}
|
|
|
|
|
|
module_init(eni_init);
|
|
/* @@@ since exit routine not defined, this module can not be unloaded */
|
|
|
|
MODULE_LICENSE("GPL");
|