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2319 lines
61 KiB
2319 lines
61 KiB
// 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; |
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trouble: |
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if (paddr) |
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dma_unmap_single(&eni_dev->pci_dev->dev,paddr,skb->len, |
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DMA_FROM_DEVICE); |
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dma_map_error: |
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if (skb) dev_kfree_skb_irq(skb); |
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return -1; |
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} |
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static void discard(struct atm_vcc *vcc,unsigned long size) |
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{ |
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struct eni_vcc *eni_vcc; |
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eni_vcc = ENI_VCC(vcc); |
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EVENT("discard (size=%ld)\n",size,0); |
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while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0); |
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/* could do a full fallback, but that might be more expensive */ |
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if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1; |
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else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1); |
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} |
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/* |
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* TODO: should check whether direct copies (without DMA setup, dequeuing on |
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* interrupt, etc.) aren't much faster for AAL0 |
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*/ |
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static int rx_aal0(struct atm_vcc *vcc) |
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{ |
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struct eni_vcc *eni_vcc; |
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unsigned long descr; |
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unsigned long length; |
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struct sk_buff *skb; |
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|
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DPRINTK(">rx_aal0\n"); |
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eni_vcc = ENI_VCC(vcc); |
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descr = readl(eni_vcc->recv+eni_vcc->descr*4); |
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if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) { |
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rx_ident_err(vcc); |
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return 1; |
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} |
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if (descr & MID_RED_T) { |
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DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n", |
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vcc->dev->number); |
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length = 0; |
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atomic_inc(&vcc->stats->rx_err); |
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} |
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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) |
|
{ |
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struct eni_dev *eni_dev = ENI_DEV(dev); |
|
|
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if (cmd == ENI_MEMDUMP) { |
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if (!capable(CAP_NET_ADMIN)) return -EPERM; |
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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) { |
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struct eni_multipliers mult; |
|
|
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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) |
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return -EINVAL; |
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if (mult.tx) eni_dev->tx_mult = mult.tx; |
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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))) |
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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; |
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} |
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if (!dev->phy->ioctl) return -ENOIOCTLCMD; |
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return dev->phy->ioctl(dev,cmd,arg); |
|
} |
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|
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static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb) |
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{ |
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enum enq_res res; |
|
|
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DPRINTK(">eni_send\n"); |
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if (!ENI_VCC(vcc)->tx) { |
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if (vcc->pop) vcc->pop(vcc,skb); |
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else dev_kfree_skb(skb); |
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return -EINVAL; |
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} |
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if (!skb) { |
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printk(KERN_CRIT "!skb in eni_send ?\n"); |
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if (vcc->pop) vcc->pop(vcc,skb); |
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return -EINVAL; |
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} |
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if (vcc->qos.aal == ATM_AAL0) { |
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if (skb->len != ATM_CELL_SIZE-1) { |
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if (vcc->pop) vcc->pop(vcc,skb); |
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else dev_kfree_skb(skb); |
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return -EINVAL; |
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} |
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*(u32 *) skb->data = htonl(*(u32 *) skb->data); |
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} |
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submitted++; |
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ATM_SKB(skb)->vcc = vcc; |
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tasklet_disable(&ENI_DEV(vcc->dev)->task); |
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res = do_tx(skb); |
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tasklet_enable(&ENI_DEV(vcc->dev)->task); |
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if (res == enq_ok) return 0; |
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skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb); |
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backlogged++; |
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tasklet_schedule(&ENI_DEV(vcc->dev)->task); |
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return 0; |
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} |
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|
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static void eni_phy_put(struct atm_dev *dev,unsigned char value, |
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unsigned long addr) |
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{ |
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writel(value,ENI_DEV(dev)->phy+addr*4); |
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} |
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|
|
|
|
|
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static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr) |
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{ |
|
return readl(ENI_DEV(dev)->phy+addr*4); |
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} |
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|
|
|
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static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page) |
|
{ |
|
struct sock *s; |
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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) |
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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");
|
|
|