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1652 lines
43 KiB
1652 lines
43 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* drivers/atm/zatm.c - ZeitNet ZN122x 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/netdevice.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/interrupt.h> |
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#include <linux/dma-mapping.h> |
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#include <linux/atm_zatm.h> |
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#include <linux/capability.h> |
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#include <linux/bitops.h> |
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#include <linux/wait.h> |
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#include <linux/slab.h> |
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#include <asm/byteorder.h> |
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#include <asm/string.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 <linux/nospec.h> |
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#include "uPD98401.h" |
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#include "uPD98402.h" |
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#include "zeprom.h" |
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#include "zatm.h" |
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/* |
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* TODO: |
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* |
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* Minor features |
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* - support 64 kB SDUs (will have to use multibuffer batches then :-( ) |
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* - proper use of CDV, credit = max(1,CDVT*PCR) |
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* - AAL0 |
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* - better receive timestamps |
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* - OAM |
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*/ |
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#define ZATM_COPPER 1 |
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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_ZATM_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) printk(KERN_CRIT #x "==0x%x\n", (int) (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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printk(KERN_NOTICE "----- event dump follows -----\n"); |
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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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printk(KERN_NOTICE "----- event dump ends here -----\n"); |
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} |
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#endif /* CONFIG_ATM_ZATM_DEBUG */ |
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#define RING_BUSY 1 /* indication from do_tx that PDU has to be |
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backlogged */ |
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static struct atm_dev *zatm_boards = NULL; |
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static unsigned long dummy[2] = {0,0}; |
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#define zin_n(r) inl(zatm_dev->base+r*4) |
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#define zin(r) inl(zatm_dev->base+uPD98401_##r*4) |
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#define zout(v,r) outl(v,zatm_dev->base+uPD98401_##r*4) |
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#define zwait() do {} while (zin(CMR) & uPD98401_BUSY) |
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/* RX0, RX1, TX0, TX1 */ |
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static const int mbx_entries[NR_MBX] = { 1024,1024,1024,1024 }; |
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static const int mbx_esize[NR_MBX] = { 16,16,4,4 }; /* entry size in bytes */ |
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#define MBX_SIZE(i) (mbx_entries[i]*mbx_esize[i]) |
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/*-------------------------------- utilities --------------------------------*/ |
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static void zpokel(struct zatm_dev *zatm_dev,u32 value,u32 addr) |
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{ |
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zwait(); |
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zout(value,CER); |
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zout(uPD98401_IND_ACC | uPD98401_IA_BALL | |
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(uPD98401_IA_TGT_CM << uPD98401_IA_TGT_SHIFT) | addr,CMR); |
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} |
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static u32 zpeekl(struct zatm_dev *zatm_dev,u32 addr) |
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{ |
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zwait(); |
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zout(uPD98401_IND_ACC | uPD98401_IA_BALL | uPD98401_IA_RW | |
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(uPD98401_IA_TGT_CM << uPD98401_IA_TGT_SHIFT) | addr,CMR); |
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zwait(); |
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return zin(CER); |
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} |
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/*------------------------------- free lists --------------------------------*/ |
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/* |
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* Free buffer head structure: |
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* [0] pointer to buffer (for SAR) |
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* [1] buffer descr link pointer (for SAR) |
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* [2] back pointer to skb (for poll_rx) |
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* [3] data |
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* ... |
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*/ |
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struct rx_buffer_head { |
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u32 buffer; /* pointer to buffer (for SAR) */ |
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u32 link; /* buffer descriptor link pointer (for SAR) */ |
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struct sk_buff *skb; /* back pointer to skb (for poll_rx) */ |
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}; |
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static void refill_pool(struct atm_dev *dev,int pool) |
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{ |
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struct zatm_dev *zatm_dev; |
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struct sk_buff *skb; |
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struct rx_buffer_head *first; |
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unsigned long flags; |
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int align,offset,free,count,size; |
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EVENT("refill_pool\n",0,0); |
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zatm_dev = ZATM_DEV(dev); |
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size = (64 << (pool <= ZATM_AAL5_POOL_BASE ? 0 : |
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pool-ZATM_AAL5_POOL_BASE))+sizeof(struct rx_buffer_head); |
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if (size < PAGE_SIZE) { |
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align = 32; /* for 32 byte alignment */ |
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offset = sizeof(struct rx_buffer_head); |
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} |
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else { |
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align = 4096; |
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offset = zatm_dev->pool_info[pool].offset+ |
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sizeof(struct rx_buffer_head); |
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} |
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size += align; |
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spin_lock_irqsave(&zatm_dev->lock, flags); |
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free = zpeekl(zatm_dev,zatm_dev->pool_base+2*pool) & |
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uPD98401_RXFP_REMAIN; |
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spin_unlock_irqrestore(&zatm_dev->lock, flags); |
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if (free >= zatm_dev->pool_info[pool].low_water) return; |
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EVENT("starting ... POOL: 0x%x, 0x%x\n", |
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zpeekl(zatm_dev,zatm_dev->pool_base+2*pool), |
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zpeekl(zatm_dev,zatm_dev->pool_base+2*pool+1)); |
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EVENT("dummy: 0x%08lx, 0x%08lx\n",dummy[0],dummy[1]); |
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count = 0; |
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first = NULL; |
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while (free < zatm_dev->pool_info[pool].high_water) { |
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struct rx_buffer_head *head; |
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skb = alloc_skb(size,GFP_ATOMIC); |
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if (!skb) { |
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printk(KERN_WARNING DEV_LABEL "(Itf %d): got no new " |
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"skb (%d) with %d free\n",dev->number,size,free); |
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break; |
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} |
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skb_reserve(skb,(unsigned char *) ((((unsigned long) skb->data+ |
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align+offset-1) & ~(unsigned long) (align-1))-offset)- |
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skb->data); |
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head = (struct rx_buffer_head *) skb->data; |
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skb_reserve(skb,sizeof(struct rx_buffer_head)); |
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if (!first) first = head; |
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count++; |
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head->buffer = virt_to_bus(skb->data); |
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head->link = 0; |
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head->skb = skb; |
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EVENT("enq skb 0x%08lx/0x%08lx\n",(unsigned long) skb, |
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(unsigned long) head); |
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spin_lock_irqsave(&zatm_dev->lock, flags); |
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if (zatm_dev->last_free[pool]) |
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((struct rx_buffer_head *) (zatm_dev->last_free[pool]-> |
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data))[-1].link = virt_to_bus(head); |
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zatm_dev->last_free[pool] = skb; |
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skb_queue_tail(&zatm_dev->pool[pool],skb); |
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spin_unlock_irqrestore(&zatm_dev->lock, flags); |
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free++; |
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} |
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if (first) { |
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spin_lock_irqsave(&zatm_dev->lock, flags); |
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zwait(); |
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zout(virt_to_bus(first),CER); |
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zout(uPD98401_ADD_BAT | (pool << uPD98401_POOL_SHIFT) | count, |
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CMR); |
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spin_unlock_irqrestore(&zatm_dev->lock, flags); |
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EVENT ("POOL: 0x%x, 0x%x\n", |
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zpeekl(zatm_dev,zatm_dev->pool_base+2*pool), |
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zpeekl(zatm_dev,zatm_dev->pool_base+2*pool+1)); |
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EVENT("dummy: 0x%08lx, 0x%08lx\n",dummy[0],dummy[1]); |
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} |
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} |
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static void drain_free(struct atm_dev *dev,int pool) |
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{ |
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skb_queue_purge(&ZATM_DEV(dev)->pool[pool]); |
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} |
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static int pool_index(int max_pdu) |
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{ |
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int i; |
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if (max_pdu % ATM_CELL_PAYLOAD) |
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printk(KERN_ERR DEV_LABEL ": driver error in pool_index: " |
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"max_pdu is %d\n",max_pdu); |
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if (max_pdu > 65536) return -1; |
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for (i = 0; (64 << i) < max_pdu; i++); |
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return i+ZATM_AAL5_POOL_BASE; |
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} |
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/* use_pool isn't reentrant */ |
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static void use_pool(struct atm_dev *dev,int pool) |
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{ |
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struct zatm_dev *zatm_dev; |
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unsigned long flags; |
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int size; |
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zatm_dev = ZATM_DEV(dev); |
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if (!(zatm_dev->pool_info[pool].ref_count++)) { |
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skb_queue_head_init(&zatm_dev->pool[pool]); |
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size = pool-ZATM_AAL5_POOL_BASE; |
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if (size < 0) size = 0; /* 64B... */ |
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else if (size > 10) size = 10; /* ... 64kB */ |
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spin_lock_irqsave(&zatm_dev->lock, flags); |
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zpokel(zatm_dev,((zatm_dev->pool_info[pool].low_water/4) << |
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uPD98401_RXFP_ALERT_SHIFT) | |
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(1 << uPD98401_RXFP_BTSZ_SHIFT) | |
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(size << uPD98401_RXFP_BFSZ_SHIFT), |
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zatm_dev->pool_base+pool*2); |
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zpokel(zatm_dev,(unsigned long) dummy,zatm_dev->pool_base+ |
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pool*2+1); |
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spin_unlock_irqrestore(&zatm_dev->lock, flags); |
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zatm_dev->last_free[pool] = NULL; |
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refill_pool(dev,pool); |
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} |
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DPRINTK("pool %d: %d\n",pool,zatm_dev->pool_info[pool].ref_count); |
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} |
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static void unuse_pool(struct atm_dev *dev,int pool) |
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{ |
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if (!(--ZATM_DEV(dev)->pool_info[pool].ref_count)) |
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drain_free(dev,pool); |
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} |
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/*----------------------------------- RX ------------------------------------*/ |
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#if 0 |
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static void exception(struct atm_vcc *vcc) |
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{ |
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static int count = 0; |
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struct zatm_dev *zatm_dev = ZATM_DEV(vcc->dev); |
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struct zatm_vcc *zatm_vcc = ZATM_VCC(vcc); |
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unsigned long *qrp; |
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int i; |
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if (count++ > 2) return; |
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for (i = 0; i < 8; i++) |
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printk("TX%d: 0x%08lx\n",i, |
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zpeekl(zatm_dev,zatm_vcc->tx_chan*VC_SIZE/4+i)); |
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for (i = 0; i < 5; i++) |
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printk("SH%d: 0x%08lx\n",i, |
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zpeekl(zatm_dev,uPD98401_IM(zatm_vcc->shaper)+16*i)); |
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qrp = (unsigned long *) zpeekl(zatm_dev,zatm_vcc->tx_chan*VC_SIZE/4+ |
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uPD98401_TXVC_QRP); |
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printk("qrp=0x%08lx\n",(unsigned long) qrp); |
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for (i = 0; i < 4; i++) printk("QRP[%d]: 0x%08lx",i,qrp[i]); |
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} |
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#endif |
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static const char *err_txt[] = { |
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"No error", |
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"RX buf underflow", |
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"RX FIFO overrun", |
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"Maximum len violation", |
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"CRC error", |
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"User abort", |
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"Length violation", |
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"T1 error", |
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"Deactivated", |
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"???", |
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"???", |
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"???", |
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"???", |
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"???", |
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"???", |
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"???" |
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}; |
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static void poll_rx(struct atm_dev *dev,int mbx) |
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{ |
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struct zatm_dev *zatm_dev; |
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unsigned long pos; |
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u32 x; |
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int error; |
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EVENT("poll_rx\n",0,0); |
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zatm_dev = ZATM_DEV(dev); |
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pos = (zatm_dev->mbx_start[mbx] & ~0xffffUL) | zin(MTA(mbx)); |
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while (x = zin(MWA(mbx)), (pos & 0xffff) != x) { |
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u32 *here; |
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struct sk_buff *skb; |
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struct atm_vcc *vcc; |
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int cells,size,chan; |
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EVENT("MBX: host 0x%lx, nic 0x%x\n",pos,x); |
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here = (u32 *) pos; |
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if (((pos += 16) & 0xffff) == zatm_dev->mbx_end[mbx]) |
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pos = zatm_dev->mbx_start[mbx]; |
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cells = here[0] & uPD98401_AAL5_SIZE; |
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#if 0 |
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printk("RX IND: 0x%x, 0x%x, 0x%x, 0x%x\n",here[0],here[1],here[2],here[3]); |
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{ |
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unsigned long *x; |
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printk("POOL: 0x%08x, 0x%08x\n",zpeekl(zatm_dev, |
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zatm_dev->pool_base), |
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zpeekl(zatm_dev,zatm_dev->pool_base+1)); |
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x = (unsigned long *) here[2]; |
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printk("[0..3] = 0x%08lx, 0x%08lx, 0x%08lx, 0x%08lx\n", |
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x[0],x[1],x[2],x[3]); |
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} |
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#endif |
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error = 0; |
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if (here[3] & uPD98401_AAL5_ERR) { |
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error = (here[3] & uPD98401_AAL5_ES) >> |
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uPD98401_AAL5_ES_SHIFT; |
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if (error == uPD98401_AAL5_ES_DEACT || |
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error == uPD98401_AAL5_ES_FREE) continue; |
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} |
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EVENT("error code 0x%x/0x%x\n",(here[3] & uPD98401_AAL5_ES) >> |
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uPD98401_AAL5_ES_SHIFT,error); |
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skb = ((struct rx_buffer_head *) bus_to_virt(here[2]))->skb; |
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__net_timestamp(skb); |
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#if 0 |
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printk("[-3..0] 0x%08lx 0x%08lx 0x%08lx 0x%08lx\n",((unsigned *) skb->data)[-3], |
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((unsigned *) skb->data)[-2],((unsigned *) skb->data)[-1], |
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((unsigned *) skb->data)[0]); |
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#endif |
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EVENT("skb 0x%lx, here 0x%lx\n",(unsigned long) skb, |
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(unsigned long) here); |
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#if 0 |
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printk("dummy: 0x%08lx, 0x%08lx\n",dummy[0],dummy[1]); |
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#endif |
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size = error ? 0 : ntohs(((__be16 *) skb->data)[cells* |
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ATM_CELL_PAYLOAD/sizeof(u16)-3]); |
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EVENT("got skb 0x%lx, size %d\n",(unsigned long) skb,size); |
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chan = (here[3] & uPD98401_AAL5_CHAN) >> |
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uPD98401_AAL5_CHAN_SHIFT; |
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if (chan < zatm_dev->chans && zatm_dev->rx_map[chan]) { |
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int pos; |
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vcc = zatm_dev->rx_map[chan]; |
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pos = ZATM_VCC(vcc)->pool; |
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if (skb == zatm_dev->last_free[pos]) |
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zatm_dev->last_free[pos] = NULL; |
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skb_unlink(skb, zatm_dev->pool + pos); |
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} |
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else { |
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printk(KERN_ERR DEV_LABEL "(itf %d): RX indication " |
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"for non-existing channel\n",dev->number); |
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size = 0; |
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vcc = NULL; |
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event_dump(); |
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} |
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if (error) { |
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static unsigned long silence = 0; |
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static int last_error = 0; |
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if (error != last_error || |
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time_after(jiffies, silence) || silence == 0){ |
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printk(KERN_WARNING DEV_LABEL "(itf %d): " |
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"chan %d error %s\n",dev->number,chan, |
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err_txt[error]); |
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last_error = error; |
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silence = (jiffies+2*HZ)|1; |
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} |
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size = 0; |
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} |
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if (size && (size > cells*ATM_CELL_PAYLOAD-ATM_AAL5_TRAILER || |
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size <= (cells-1)*ATM_CELL_PAYLOAD-ATM_AAL5_TRAILER)) { |
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printk(KERN_ERR DEV_LABEL "(itf %d): size %d with %d " |
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"cells\n",dev->number,size,cells); |
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size = 0; |
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event_dump(); |
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} |
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if (size > ATM_MAX_AAL5_PDU) { |
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printk(KERN_ERR DEV_LABEL "(itf %d): size too big " |
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"(%d)\n",dev->number,size); |
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size = 0; |
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event_dump(); |
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} |
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if (!size) { |
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dev_kfree_skb_irq(skb); |
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if (vcc) atomic_inc(&vcc->stats->rx_err); |
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continue; |
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} |
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if (!atm_charge(vcc,skb->truesize)) { |
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dev_kfree_skb_irq(skb); |
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continue; |
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} |
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skb->len = size; |
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ATM_SKB(skb)->vcc = vcc; |
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vcc->push(vcc,skb); |
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atomic_inc(&vcc->stats->rx); |
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} |
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zout(pos & 0xffff,MTA(mbx)); |
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#if 0 /* probably a stupid idea */ |
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refill_pool(dev,zatm_vcc->pool); |
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/* maybe this saves us a few interrupts */ |
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#endif |
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} |
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static int open_rx_first(struct atm_vcc *vcc) |
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{ |
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struct zatm_dev *zatm_dev; |
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struct zatm_vcc *zatm_vcc; |
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unsigned long flags; |
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unsigned short chan; |
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int cells; |
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DPRINTK("open_rx_first (0x%x)\n",inb_p(0xc053)); |
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zatm_dev = ZATM_DEV(vcc->dev); |
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zatm_vcc = ZATM_VCC(vcc); |
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zatm_vcc->rx_chan = 0; |
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if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0; |
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if (vcc->qos.aal == ATM_AAL5) { |
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if (vcc->qos.rxtp.max_sdu > 65464) |
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vcc->qos.rxtp.max_sdu = 65464; |
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/* fix this - we may want to receive 64kB SDUs |
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later */ |
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cells = DIV_ROUND_UP(vcc->qos.rxtp.max_sdu + ATM_AAL5_TRAILER, |
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ATM_CELL_PAYLOAD); |
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zatm_vcc->pool = pool_index(cells*ATM_CELL_PAYLOAD); |
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} |
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else { |
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cells = 1; |
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zatm_vcc->pool = ZATM_AAL0_POOL; |
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} |
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if (zatm_vcc->pool < 0) return -EMSGSIZE; |
|
spin_lock_irqsave(&zatm_dev->lock, flags); |
|
zwait(); |
|
zout(uPD98401_OPEN_CHAN,CMR); |
|
zwait(); |
|
DPRINTK("0x%x 0x%x\n",zin(CMR),zin(CER)); |
|
chan = (zin(CMR) & uPD98401_CHAN_ADDR) >> uPD98401_CHAN_ADDR_SHIFT; |
|
spin_unlock_irqrestore(&zatm_dev->lock, flags); |
|
DPRINTK("chan is %d\n",chan); |
|
if (!chan) return -EAGAIN; |
|
use_pool(vcc->dev,zatm_vcc->pool); |
|
DPRINTK("pool %d\n",zatm_vcc->pool); |
|
/* set up VC descriptor */ |
|
spin_lock_irqsave(&zatm_dev->lock, flags); |
|
zpokel(zatm_dev,zatm_vcc->pool << uPD98401_RXVC_POOL_SHIFT, |
|
chan*VC_SIZE/4); |
|
zpokel(zatm_dev,uPD98401_RXVC_OD | (vcc->qos.aal == ATM_AAL5 ? |
|
uPD98401_RXVC_AR : 0) | cells,chan*VC_SIZE/4+1); |
|
zpokel(zatm_dev,0,chan*VC_SIZE/4+2); |
|
zatm_vcc->rx_chan = chan; |
|
zatm_dev->rx_map[chan] = vcc; |
|
spin_unlock_irqrestore(&zatm_dev->lock, flags); |
|
return 0; |
|
} |
|
|
|
|
|
static int open_rx_second(struct atm_vcc *vcc) |
|
{ |
|
struct zatm_dev *zatm_dev; |
|
struct zatm_vcc *zatm_vcc; |
|
unsigned long flags; |
|
int pos,shift; |
|
|
|
DPRINTK("open_rx_second (0x%x)\n",inb_p(0xc053)); |
|
zatm_dev = ZATM_DEV(vcc->dev); |
|
zatm_vcc = ZATM_VCC(vcc); |
|
if (!zatm_vcc->rx_chan) return 0; |
|
spin_lock_irqsave(&zatm_dev->lock, flags); |
|
/* should also handle VPI @@@ */ |
|
pos = vcc->vci >> 1; |
|
shift = (1-(vcc->vci & 1)) << 4; |
|
zpokel(zatm_dev,(zpeekl(zatm_dev,pos) & ~(0xffff << shift)) | |
|
((zatm_vcc->rx_chan | uPD98401_RXLT_ENBL) << shift),pos); |
|
spin_unlock_irqrestore(&zatm_dev->lock, flags); |
|
return 0; |
|
} |
|
|
|
|
|
static void close_rx(struct atm_vcc *vcc) |
|
{ |
|
struct zatm_dev *zatm_dev; |
|
struct zatm_vcc *zatm_vcc; |
|
unsigned long flags; |
|
int pos,shift; |
|
|
|
zatm_vcc = ZATM_VCC(vcc); |
|
zatm_dev = ZATM_DEV(vcc->dev); |
|
if (!zatm_vcc->rx_chan) return; |
|
DPRINTK("close_rx\n"); |
|
/* disable receiver */ |
|
if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) { |
|
spin_lock_irqsave(&zatm_dev->lock, flags); |
|
pos = vcc->vci >> 1; |
|
shift = (1-(vcc->vci & 1)) << 4; |
|
zpokel(zatm_dev,zpeekl(zatm_dev,pos) & ~(0xffff << shift),pos); |
|
zwait(); |
|
zout(uPD98401_NOP,CMR); |
|
zwait(); |
|
zout(uPD98401_NOP,CMR); |
|
spin_unlock_irqrestore(&zatm_dev->lock, flags); |
|
} |
|
spin_lock_irqsave(&zatm_dev->lock, flags); |
|
zwait(); |
|
zout(uPD98401_DEACT_CHAN | uPD98401_CHAN_RT | (zatm_vcc->rx_chan << |
|
uPD98401_CHAN_ADDR_SHIFT),CMR); |
|
zwait(); |
|
udelay(10); /* why oh why ... ? */ |
|
zout(uPD98401_CLOSE_CHAN | uPD98401_CHAN_RT | (zatm_vcc->rx_chan << |
|
uPD98401_CHAN_ADDR_SHIFT),CMR); |
|
zwait(); |
|
if (!(zin(CMR) & uPD98401_CHAN_ADDR)) |
|
printk(KERN_CRIT DEV_LABEL "(itf %d): can't close RX channel " |
|
"%d\n",vcc->dev->number,zatm_vcc->rx_chan); |
|
spin_unlock_irqrestore(&zatm_dev->lock, flags); |
|
zatm_dev->rx_map[zatm_vcc->rx_chan] = NULL; |
|
zatm_vcc->rx_chan = 0; |
|
unuse_pool(vcc->dev,zatm_vcc->pool); |
|
} |
|
|
|
|
|
static int start_rx(struct atm_dev *dev) |
|
{ |
|
struct zatm_dev *zatm_dev; |
|
int i; |
|
|
|
DPRINTK("start_rx\n"); |
|
zatm_dev = ZATM_DEV(dev); |
|
zatm_dev->rx_map = kcalloc(zatm_dev->chans, |
|
sizeof(*zatm_dev->rx_map), |
|
GFP_KERNEL); |
|
if (!zatm_dev->rx_map) return -ENOMEM; |
|
/* set VPI/VCI split (use all VCIs and give what's left to VPIs) */ |
|
zpokel(zatm_dev,(1 << dev->ci_range.vci_bits)-1,uPD98401_VRR); |
|
/* prepare free buffer pools */ |
|
for (i = 0; i <= ZATM_LAST_POOL; i++) { |
|
zatm_dev->pool_info[i].ref_count = 0; |
|
zatm_dev->pool_info[i].rqa_count = 0; |
|
zatm_dev->pool_info[i].rqu_count = 0; |
|
zatm_dev->pool_info[i].low_water = LOW_MARK; |
|
zatm_dev->pool_info[i].high_water = HIGH_MARK; |
|
zatm_dev->pool_info[i].offset = 0; |
|
zatm_dev->pool_info[i].next_off = 0; |
|
zatm_dev->pool_info[i].next_cnt = 0; |
|
zatm_dev->pool_info[i].next_thres = OFF_CNG_THRES; |
|
} |
|
return 0; |
|
} |
|
|
|
|
|
/*----------------------------------- TX ------------------------------------*/ |
|
|
|
|
|
static int do_tx(struct sk_buff *skb) |
|
{ |
|
struct atm_vcc *vcc; |
|
struct zatm_dev *zatm_dev; |
|
struct zatm_vcc *zatm_vcc; |
|
u32 *dsc; |
|
unsigned long flags; |
|
|
|
EVENT("do_tx\n",0,0); |
|
DPRINTK("sending skb %p\n",skb); |
|
vcc = ATM_SKB(skb)->vcc; |
|
zatm_dev = ZATM_DEV(vcc->dev); |
|
zatm_vcc = ZATM_VCC(vcc); |
|
EVENT("iovcnt=%d\n",skb_shinfo(skb)->nr_frags,0); |
|
spin_lock_irqsave(&zatm_dev->lock, flags); |
|
if (!skb_shinfo(skb)->nr_frags) { |
|
if (zatm_vcc->txing == RING_ENTRIES-1) { |
|
spin_unlock_irqrestore(&zatm_dev->lock, flags); |
|
return RING_BUSY; |
|
} |
|
zatm_vcc->txing++; |
|
dsc = zatm_vcc->ring+zatm_vcc->ring_curr; |
|
zatm_vcc->ring_curr = (zatm_vcc->ring_curr+RING_WORDS) & |
|
(RING_ENTRIES*RING_WORDS-1); |
|
dsc[1] = 0; |
|
dsc[2] = skb->len; |
|
dsc[3] = virt_to_bus(skb->data); |
|
mb(); |
|
dsc[0] = uPD98401_TXPD_V | uPD98401_TXPD_DP | uPD98401_TXPD_SM |
|
| (vcc->qos.aal == ATM_AAL5 ? uPD98401_TXPD_AAL5 : 0 | |
|
(ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? |
|
uPD98401_CLPM_1 : uPD98401_CLPM_0)); |
|
EVENT("dsc (0x%lx)\n",(unsigned long) dsc,0); |
|
} |
|
else { |
|
printk("NONONONOO!!!!\n"); |
|
dsc = NULL; |
|
#if 0 |
|
u32 *put; |
|
int i; |
|
|
|
dsc = kmalloc(uPD98401_TXPD_SIZE * 2 + |
|
uPD98401_TXBD_SIZE * ATM_SKB(skb)->iovcnt, GFP_ATOMIC); |
|
if (!dsc) { |
|
if (vcc->pop) |
|
vcc->pop(vcc, skb); |
|
else |
|
dev_kfree_skb_irq(skb); |
|
return -EAGAIN; |
|
} |
|
/* @@@ should check alignment */ |
|
put = dsc+8; |
|
dsc[0] = uPD98401_TXPD_V | uPD98401_TXPD_DP | |
|
(vcc->aal == ATM_AAL5 ? uPD98401_TXPD_AAL5 : 0 | |
|
(ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? |
|
uPD98401_CLPM_1 : uPD98401_CLPM_0)); |
|
dsc[1] = 0; |
|
dsc[2] = ATM_SKB(skb)->iovcnt * uPD98401_TXBD_SIZE; |
|
dsc[3] = virt_to_bus(put); |
|
for (i = 0; i < ATM_SKB(skb)->iovcnt; i++) { |
|
*put++ = ((struct iovec *) skb->data)[i].iov_len; |
|
*put++ = virt_to_bus(((struct iovec *) |
|
skb->data)[i].iov_base); |
|
} |
|
put[-2] |= uPD98401_TXBD_LAST; |
|
#endif |
|
} |
|
ZATM_PRV_DSC(skb) = dsc; |
|
skb_queue_tail(&zatm_vcc->tx_queue,skb); |
|
DPRINTK("QRP=0x%08lx\n",zpeekl(zatm_dev,zatm_vcc->tx_chan*VC_SIZE/4+ |
|
uPD98401_TXVC_QRP)); |
|
zwait(); |
|
zout(uPD98401_TX_READY | (zatm_vcc->tx_chan << |
|
uPD98401_CHAN_ADDR_SHIFT),CMR); |
|
spin_unlock_irqrestore(&zatm_dev->lock, flags); |
|
EVENT("done\n",0,0); |
|
return 0; |
|
} |
|
|
|
|
|
static inline void dequeue_tx(struct atm_vcc *vcc) |
|
{ |
|
struct zatm_vcc *zatm_vcc; |
|
struct sk_buff *skb; |
|
|
|
EVENT("dequeue_tx\n",0,0); |
|
zatm_vcc = ZATM_VCC(vcc); |
|
skb = skb_dequeue(&zatm_vcc->tx_queue); |
|
if (!skb) { |
|
printk(KERN_CRIT DEV_LABEL "(itf %d): dequeue_tx but not " |
|
"txing\n",vcc->dev->number); |
|
return; |
|
} |
|
#if 0 /* @@@ would fail on CLP */ |
|
if (*ZATM_PRV_DSC(skb) != (uPD98401_TXPD_V | uPD98401_TXPD_DP | |
|
uPD98401_TXPD_SM | uPD98401_TXPD_AAL5)) printk("@#*$!!!! (%08x)\n", |
|
*ZATM_PRV_DSC(skb)); |
|
#endif |
|
*ZATM_PRV_DSC(skb) = 0; /* mark as invalid */ |
|
zatm_vcc->txing--; |
|
if (vcc->pop) vcc->pop(vcc,skb); |
|
else dev_kfree_skb_irq(skb); |
|
while ((skb = skb_dequeue(&zatm_vcc->backlog))) |
|
if (do_tx(skb) == RING_BUSY) { |
|
skb_queue_head(&zatm_vcc->backlog,skb); |
|
break; |
|
} |
|
atomic_inc(&vcc->stats->tx); |
|
wake_up(&zatm_vcc->tx_wait); |
|
} |
|
|
|
|
|
static void poll_tx(struct atm_dev *dev,int mbx) |
|
{ |
|
struct zatm_dev *zatm_dev; |
|
unsigned long pos; |
|
u32 x; |
|
|
|
EVENT("poll_tx\n",0,0); |
|
zatm_dev = ZATM_DEV(dev); |
|
pos = (zatm_dev->mbx_start[mbx] & ~0xffffUL) | zin(MTA(mbx)); |
|
while (x = zin(MWA(mbx)), (pos & 0xffff) != x) { |
|
int chan; |
|
|
|
#if 1 |
|
u32 data,*addr; |
|
|
|
EVENT("MBX: host 0x%lx, nic 0x%x\n",pos,x); |
|
addr = (u32 *) pos; |
|
data = *addr; |
|
chan = (data & uPD98401_TXI_CONN) >> uPD98401_TXI_CONN_SHIFT; |
|
EVENT("addr = 0x%lx, data = 0x%08x,",(unsigned long) addr, |
|
data); |
|
EVENT("chan = %d\n",chan,0); |
|
#else |
|
NO ! |
|
chan = (zatm_dev->mbx_start[mbx][pos >> 2] & uPD98401_TXI_CONN) |
|
>> uPD98401_TXI_CONN_SHIFT; |
|
#endif |
|
if (chan < zatm_dev->chans && zatm_dev->tx_map[chan]) |
|
dequeue_tx(zatm_dev->tx_map[chan]); |
|
else { |
|
printk(KERN_CRIT DEV_LABEL "(itf %d): TX indication " |
|
"for non-existing channel %d\n",dev->number,chan); |
|
event_dump(); |
|
} |
|
if (((pos += 4) & 0xffff) == zatm_dev->mbx_end[mbx]) |
|
pos = zatm_dev->mbx_start[mbx]; |
|
} |
|
zout(pos & 0xffff,MTA(mbx)); |
|
} |
|
|
|
|
|
/* |
|
* BUG BUG BUG: Doesn't handle "new-style" rate specification yet. |
|
*/ |
|
|
|
static int alloc_shaper(struct atm_dev *dev,int *pcr,int min,int max,int ubr) |
|
{ |
|
struct zatm_dev *zatm_dev; |
|
unsigned long flags; |
|
unsigned long i,m,c; |
|
int shaper; |
|
|
|
DPRINTK("alloc_shaper (min = %d, max = %d)\n",min,max); |
|
zatm_dev = ZATM_DEV(dev); |
|
if (!zatm_dev->free_shapers) return -EAGAIN; |
|
for (shaper = 0; !((zatm_dev->free_shapers >> shaper) & 1); shaper++); |
|
zatm_dev->free_shapers &= ~1 << shaper; |
|
if (ubr) { |
|
c = 5; |
|
i = m = 1; |
|
zatm_dev->ubr_ref_cnt++; |
|
zatm_dev->ubr = shaper; |
|
*pcr = 0; |
|
} |
|
else { |
|
if (min) { |
|
if (min <= 255) { |
|
i = min; |
|
m = ATM_OC3_PCR; |
|
} |
|
else { |
|
i = 255; |
|
m = ATM_OC3_PCR*255/min; |
|
} |
|
} |
|
else { |
|
if (max > zatm_dev->tx_bw) max = zatm_dev->tx_bw; |
|
if (max <= 255) { |
|
i = max; |
|
m = ATM_OC3_PCR; |
|
} |
|
else { |
|
i = 255; |
|
m = DIV_ROUND_UP(ATM_OC3_PCR*255, max); |
|
} |
|
} |
|
if (i > m) { |
|
printk(KERN_CRIT DEV_LABEL "shaper algorithm botched " |
|
"[%d,%d] -> i=%ld,m=%ld\n",min,max,i,m); |
|
m = i; |
|
} |
|
*pcr = i*ATM_OC3_PCR/m; |
|
c = 20; /* @@@ should use max_cdv ! */ |
|
if ((min && *pcr < min) || (max && *pcr > max)) return -EINVAL; |
|
if (zatm_dev->tx_bw < *pcr) return -EAGAIN; |
|
zatm_dev->tx_bw -= *pcr; |
|
} |
|
spin_lock_irqsave(&zatm_dev->lock, flags); |
|
DPRINTK("i = %d, m = %d, PCR = %d\n",i,m,*pcr); |
|
zpokel(zatm_dev,(i << uPD98401_IM_I_SHIFT) | m,uPD98401_IM(shaper)); |
|
zpokel(zatm_dev,c << uPD98401_PC_C_SHIFT,uPD98401_PC(shaper)); |
|
zpokel(zatm_dev,0,uPD98401_X(shaper)); |
|
zpokel(zatm_dev,0,uPD98401_Y(shaper)); |
|
zpokel(zatm_dev,uPD98401_PS_E,uPD98401_PS(shaper)); |
|
spin_unlock_irqrestore(&zatm_dev->lock, flags); |
|
return shaper; |
|
} |
|
|
|
|
|
static void dealloc_shaper(struct atm_dev *dev,int shaper) |
|
{ |
|
struct zatm_dev *zatm_dev; |
|
unsigned long flags; |
|
|
|
zatm_dev = ZATM_DEV(dev); |
|
if (shaper == zatm_dev->ubr) { |
|
if (--zatm_dev->ubr_ref_cnt) return; |
|
zatm_dev->ubr = -1; |
|
} |
|
spin_lock_irqsave(&zatm_dev->lock, flags); |
|
zpokel(zatm_dev,zpeekl(zatm_dev,uPD98401_PS(shaper)) & ~uPD98401_PS_E, |
|
uPD98401_PS(shaper)); |
|
spin_unlock_irqrestore(&zatm_dev->lock, flags); |
|
zatm_dev->free_shapers |= 1 << shaper; |
|
} |
|
|
|
|
|
static void close_tx(struct atm_vcc *vcc) |
|
{ |
|
struct zatm_dev *zatm_dev; |
|
struct zatm_vcc *zatm_vcc; |
|
unsigned long flags; |
|
int chan; |
|
|
|
zatm_vcc = ZATM_VCC(vcc); |
|
zatm_dev = ZATM_DEV(vcc->dev); |
|
chan = zatm_vcc->tx_chan; |
|
if (!chan) return; |
|
DPRINTK("close_tx\n"); |
|
if (skb_peek(&zatm_vcc->backlog)) { |
|
printk("waiting for backlog to drain ...\n"); |
|
event_dump(); |
|
wait_event(zatm_vcc->tx_wait, !skb_peek(&zatm_vcc->backlog)); |
|
} |
|
if (skb_peek(&zatm_vcc->tx_queue)) { |
|
printk("waiting for TX queue to drain ...\n"); |
|
event_dump(); |
|
wait_event(zatm_vcc->tx_wait, !skb_peek(&zatm_vcc->tx_queue)); |
|
} |
|
spin_lock_irqsave(&zatm_dev->lock, flags); |
|
#if 0 |
|
zwait(); |
|
zout(uPD98401_DEACT_CHAN | (chan << uPD98401_CHAN_ADDR_SHIFT),CMR); |
|
#endif |
|
zwait(); |
|
zout(uPD98401_CLOSE_CHAN | (chan << uPD98401_CHAN_ADDR_SHIFT),CMR); |
|
zwait(); |
|
if (!(zin(CMR) & uPD98401_CHAN_ADDR)) |
|
printk(KERN_CRIT DEV_LABEL "(itf %d): can't close TX channel " |
|
"%d\n",vcc->dev->number,chan); |
|
spin_unlock_irqrestore(&zatm_dev->lock, flags); |
|
zatm_vcc->tx_chan = 0; |
|
zatm_dev->tx_map[chan] = NULL; |
|
if (zatm_vcc->shaper != zatm_dev->ubr) { |
|
zatm_dev->tx_bw += vcc->qos.txtp.min_pcr; |
|
dealloc_shaper(vcc->dev,zatm_vcc->shaper); |
|
} |
|
kfree(zatm_vcc->ring); |
|
} |
|
|
|
|
|
static int open_tx_first(struct atm_vcc *vcc) |
|
{ |
|
struct zatm_dev *zatm_dev; |
|
struct zatm_vcc *zatm_vcc; |
|
unsigned long flags; |
|
u32 *loop; |
|
unsigned short chan; |
|
int unlimited; |
|
|
|
DPRINTK("open_tx_first\n"); |
|
zatm_dev = ZATM_DEV(vcc->dev); |
|
zatm_vcc = ZATM_VCC(vcc); |
|
zatm_vcc->tx_chan = 0; |
|
if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0; |
|
spin_lock_irqsave(&zatm_dev->lock, flags); |
|
zwait(); |
|
zout(uPD98401_OPEN_CHAN,CMR); |
|
zwait(); |
|
DPRINTK("0x%x 0x%x\n",zin(CMR),zin(CER)); |
|
chan = (zin(CMR) & uPD98401_CHAN_ADDR) >> uPD98401_CHAN_ADDR_SHIFT; |
|
spin_unlock_irqrestore(&zatm_dev->lock, flags); |
|
DPRINTK("chan is %d\n",chan); |
|
if (!chan) return -EAGAIN; |
|
unlimited = vcc->qos.txtp.traffic_class == ATM_UBR && |
|
(!vcc->qos.txtp.max_pcr || vcc->qos.txtp.max_pcr == ATM_MAX_PCR || |
|
vcc->qos.txtp.max_pcr >= ATM_OC3_PCR); |
|
if (unlimited && zatm_dev->ubr != -1) zatm_vcc->shaper = zatm_dev->ubr; |
|
else { |
|
int pcr; |
|
|
|
if (unlimited) vcc->qos.txtp.max_sdu = ATM_MAX_AAL5_PDU; |
|
if ((zatm_vcc->shaper = alloc_shaper(vcc->dev,&pcr, |
|
vcc->qos.txtp.min_pcr,vcc->qos.txtp.max_pcr,unlimited)) |
|
< 0) { |
|
close_tx(vcc); |
|
return zatm_vcc->shaper; |
|
} |
|
if (pcr > ATM_OC3_PCR) pcr = ATM_OC3_PCR; |
|
vcc->qos.txtp.min_pcr = vcc->qos.txtp.max_pcr = pcr; |
|
} |
|
zatm_vcc->tx_chan = chan; |
|
skb_queue_head_init(&zatm_vcc->tx_queue); |
|
init_waitqueue_head(&zatm_vcc->tx_wait); |
|
/* initialize ring */ |
|
zatm_vcc->ring = kzalloc(RING_SIZE,GFP_KERNEL); |
|
if (!zatm_vcc->ring) return -ENOMEM; |
|
loop = zatm_vcc->ring+RING_ENTRIES*RING_WORDS; |
|
loop[0] = uPD98401_TXPD_V; |
|
loop[1] = loop[2] = 0; |
|
loop[3] = virt_to_bus(zatm_vcc->ring); |
|
zatm_vcc->ring_curr = 0; |
|
zatm_vcc->txing = 0; |
|
skb_queue_head_init(&zatm_vcc->backlog); |
|
zpokel(zatm_dev,virt_to_bus(zatm_vcc->ring), |
|
chan*VC_SIZE/4+uPD98401_TXVC_QRP); |
|
return 0; |
|
} |
|
|
|
|
|
static int open_tx_second(struct atm_vcc *vcc) |
|
{ |
|
struct zatm_dev *zatm_dev; |
|
struct zatm_vcc *zatm_vcc; |
|
unsigned long flags; |
|
|
|
DPRINTK("open_tx_second\n"); |
|
zatm_dev = ZATM_DEV(vcc->dev); |
|
zatm_vcc = ZATM_VCC(vcc); |
|
if (!zatm_vcc->tx_chan) return 0; |
|
/* set up VC descriptor */ |
|
spin_lock_irqsave(&zatm_dev->lock, flags); |
|
zpokel(zatm_dev,0,zatm_vcc->tx_chan*VC_SIZE/4); |
|
zpokel(zatm_dev,uPD98401_TXVC_L | (zatm_vcc->shaper << |
|
uPD98401_TXVC_SHP_SHIFT) | (vcc->vpi << uPD98401_TXVC_VPI_SHIFT) | |
|
vcc->vci,zatm_vcc->tx_chan*VC_SIZE/4+1); |
|
zpokel(zatm_dev,0,zatm_vcc->tx_chan*VC_SIZE/4+2); |
|
spin_unlock_irqrestore(&zatm_dev->lock, flags); |
|
zatm_dev->tx_map[zatm_vcc->tx_chan] = vcc; |
|
return 0; |
|
} |
|
|
|
|
|
static int start_tx(struct atm_dev *dev) |
|
{ |
|
struct zatm_dev *zatm_dev; |
|
int i; |
|
|
|
DPRINTK("start_tx\n"); |
|
zatm_dev = ZATM_DEV(dev); |
|
zatm_dev->tx_map = kmalloc_array(zatm_dev->chans, |
|
sizeof(*zatm_dev->tx_map), |
|
GFP_KERNEL); |
|
if (!zatm_dev->tx_map) return -ENOMEM; |
|
zatm_dev->tx_bw = ATM_OC3_PCR; |
|
zatm_dev->free_shapers = (1 << NR_SHAPERS)-1; |
|
zatm_dev->ubr = -1; |
|
zatm_dev->ubr_ref_cnt = 0; |
|
/* initialize shapers */ |
|
for (i = 0; i < NR_SHAPERS; i++) zpokel(zatm_dev,0,uPD98401_PS(i)); |
|
return 0; |
|
} |
|
|
|
|
|
/*------------------------------- interrupts --------------------------------*/ |
|
|
|
|
|
static irqreturn_t zatm_int(int irq,void *dev_id) |
|
{ |
|
struct atm_dev *dev; |
|
struct zatm_dev *zatm_dev; |
|
u32 reason; |
|
int handled = 0; |
|
|
|
dev = dev_id; |
|
zatm_dev = ZATM_DEV(dev); |
|
while ((reason = zin(GSR))) { |
|
handled = 1; |
|
EVENT("reason 0x%x\n",reason,0); |
|
if (reason & uPD98401_INT_PI) { |
|
EVENT("PHY int\n",0,0); |
|
dev->phy->interrupt(dev); |
|
} |
|
if (reason & uPD98401_INT_RQA) { |
|
unsigned long pools; |
|
int i; |
|
|
|
pools = zin(RQA); |
|
EVENT("RQA (0x%08x)\n",pools,0); |
|
for (i = 0; pools; i++) { |
|
if (pools & 1) { |
|
refill_pool(dev,i); |
|
zatm_dev->pool_info[i].rqa_count++; |
|
} |
|
pools >>= 1; |
|
} |
|
} |
|
if (reason & uPD98401_INT_RQU) { |
|
unsigned long pools; |
|
int i; |
|
pools = zin(RQU); |
|
printk(KERN_WARNING DEV_LABEL "(itf %d): RQU 0x%08lx\n", |
|
dev->number,pools); |
|
event_dump(); |
|
for (i = 0; pools; i++) { |
|
if (pools & 1) { |
|
refill_pool(dev,i); |
|
zatm_dev->pool_info[i].rqu_count++; |
|
} |
|
pools >>= 1; |
|
} |
|
} |
|
/* don't handle RD */ |
|
if (reason & uPD98401_INT_SPE) |
|
printk(KERN_ALERT DEV_LABEL "(itf %d): system parity " |
|
"error at 0x%08x\n",dev->number,zin(ADDR)); |
|
if (reason & uPD98401_INT_CPE) |
|
printk(KERN_ALERT DEV_LABEL "(itf %d): control memory " |
|
"parity error at 0x%08x\n",dev->number,zin(ADDR)); |
|
if (reason & uPD98401_INT_SBE) { |
|
printk(KERN_ALERT DEV_LABEL "(itf %d): system bus " |
|
"error at 0x%08x\n",dev->number,zin(ADDR)); |
|
event_dump(); |
|
} |
|
/* don't handle IND */ |
|
if (reason & uPD98401_INT_MF) { |
|
printk(KERN_CRIT DEV_LABEL "(itf %d): mailbox full " |
|
"(0x%x)\n",dev->number,(reason & uPD98401_INT_MF) |
|
>> uPD98401_INT_MF_SHIFT); |
|
event_dump(); |
|
/* @@@ should try to recover */ |
|
} |
|
if (reason & uPD98401_INT_MM) { |
|
if (reason & 1) poll_rx(dev,0); |
|
if (reason & 2) poll_rx(dev,1); |
|
if (reason & 4) poll_tx(dev,2); |
|
if (reason & 8) poll_tx(dev,3); |
|
} |
|
/* @@@ handle RCRn */ |
|
} |
|
return IRQ_RETVAL(handled); |
|
} |
|
|
|
|
|
/*----------------------------- (E)EPROM access -----------------------------*/ |
|
|
|
|
|
static void eprom_set(struct zatm_dev *zatm_dev, unsigned long value, |
|
unsigned short cmd) |
|
{ |
|
int error; |
|
|
|
if ((error = pci_write_config_dword(zatm_dev->pci_dev,cmd,value))) |
|
printk(KERN_ERR DEV_LABEL ": PCI write failed (0x%02x)\n", |
|
error); |
|
} |
|
|
|
|
|
static unsigned long eprom_get(struct zatm_dev *zatm_dev, unsigned short cmd) |
|
{ |
|
unsigned int value; |
|
int error; |
|
|
|
if ((error = pci_read_config_dword(zatm_dev->pci_dev,cmd,&value))) |
|
printk(KERN_ERR DEV_LABEL ": PCI read failed (0x%02x)\n", |
|
error); |
|
return value; |
|
} |
|
|
|
|
|
static void eprom_put_bits(struct zatm_dev *zatm_dev, unsigned long data, |
|
int bits, unsigned short cmd) |
|
{ |
|
unsigned long value; |
|
int i; |
|
|
|
for (i = bits-1; i >= 0; i--) { |
|
value = ZEPROM_CS | (((data >> i) & 1) ? ZEPROM_DI : 0); |
|
eprom_set(zatm_dev,value,cmd); |
|
eprom_set(zatm_dev,value | ZEPROM_SK,cmd); |
|
eprom_set(zatm_dev,value,cmd); |
|
} |
|
} |
|
|
|
|
|
static void eprom_get_byte(struct zatm_dev *zatm_dev, unsigned char *byte, |
|
unsigned short cmd) |
|
{ |
|
int i; |
|
|
|
*byte = 0; |
|
for (i = 8; i; i--) { |
|
eprom_set(zatm_dev,ZEPROM_CS,cmd); |
|
eprom_set(zatm_dev,ZEPROM_CS | ZEPROM_SK,cmd); |
|
*byte <<= 1; |
|
if (eprom_get(zatm_dev,cmd) & ZEPROM_DO) *byte |= 1; |
|
eprom_set(zatm_dev,ZEPROM_CS,cmd); |
|
} |
|
} |
|
|
|
|
|
static int eprom_try_esi(struct atm_dev *dev, unsigned short cmd, int offset, |
|
int swap) |
|
{ |
|
unsigned char buf[ZEPROM_SIZE]; |
|
struct zatm_dev *zatm_dev; |
|
int i; |
|
|
|
zatm_dev = ZATM_DEV(dev); |
|
for (i = 0; i < ZEPROM_SIZE; i += 2) { |
|
eprom_set(zatm_dev,ZEPROM_CS,cmd); /* select EPROM */ |
|
eprom_put_bits(zatm_dev,ZEPROM_CMD_READ,ZEPROM_CMD_LEN,cmd); |
|
eprom_put_bits(zatm_dev,i >> 1,ZEPROM_ADDR_LEN,cmd); |
|
eprom_get_byte(zatm_dev,buf+i+swap,cmd); |
|
eprom_get_byte(zatm_dev,buf+i+1-swap,cmd); |
|
eprom_set(zatm_dev,0,cmd); /* deselect EPROM */ |
|
} |
|
memcpy(dev->esi,buf+offset,ESI_LEN); |
|
return memcmp(dev->esi,"\0\0\0\0\0",ESI_LEN); /* assumes ESI_LEN == 6 */ |
|
} |
|
|
|
|
|
static void eprom_get_esi(struct atm_dev *dev) |
|
{ |
|
if (eprom_try_esi(dev,ZEPROM_V1_REG,ZEPROM_V1_ESI_OFF,1)) return; |
|
(void) eprom_try_esi(dev,ZEPROM_V2_REG,ZEPROM_V2_ESI_OFF,0); |
|
} |
|
|
|
|
|
/*--------------------------------- entries ---------------------------------*/ |
|
|
|
|
|
static int zatm_init(struct atm_dev *dev) |
|
{ |
|
struct zatm_dev *zatm_dev; |
|
struct pci_dev *pci_dev; |
|
unsigned short command; |
|
int error,i,last; |
|
unsigned long t0,t1,t2; |
|
|
|
DPRINTK(">zatm_init\n"); |
|
zatm_dev = ZATM_DEV(dev); |
|
spin_lock_init(&zatm_dev->lock); |
|
pci_dev = zatm_dev->pci_dev; |
|
zatm_dev->base = pci_resource_start(pci_dev, 0); |
|
zatm_dev->irq = pci_dev->irq; |
|
if ((error = pci_read_config_word(pci_dev,PCI_COMMAND,&command))) { |
|
printk(KERN_ERR DEV_LABEL "(itf %d): init error 0x%02x\n", |
|
dev->number,error); |
|
return -EINVAL; |
|
} |
|
if ((error = pci_write_config_word(pci_dev,PCI_COMMAND, |
|
command | PCI_COMMAND_IO | PCI_COMMAND_MASTER))) { |
|
printk(KERN_ERR DEV_LABEL "(itf %d): can't enable IO (0x%02x)" |
|
"\n",dev->number,error); |
|
return -EIO; |
|
} |
|
eprom_get_esi(dev); |
|
printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%x,irq=%d,", |
|
dev->number,pci_dev->revision,zatm_dev->base,zatm_dev->irq); |
|
/* reset uPD98401 */ |
|
zout(0,SWR); |
|
while (!(zin(GSR) & uPD98401_INT_IND)); |
|
zout(uPD98401_GMR_ONE /*uPD98401_BURST4*/,GMR); |
|
last = MAX_CRAM_SIZE; |
|
for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) { |
|
zpokel(zatm_dev,0x55555555,i); |
|
if (zpeekl(zatm_dev,i) != 0x55555555) last = i; |
|
else { |
|
zpokel(zatm_dev,0xAAAAAAAA,i); |
|
if (zpeekl(zatm_dev,i) != 0xAAAAAAAA) last = i; |
|
else zpokel(zatm_dev,i,i); |
|
} |
|
} |
|
for (i = 0; i < last; i += RAM_INCREMENT) |
|
if (zpeekl(zatm_dev,i) != i) break; |
|
zatm_dev->mem = i << 2; |
|
while (i) zpokel(zatm_dev,0,--i); |
|
/* reset again to rebuild memory pointers */ |
|
zout(0,SWR); |
|
while (!(zin(GSR) & uPD98401_INT_IND)); |
|
zout(uPD98401_GMR_ONE | uPD98401_BURST8 | uPD98401_BURST4 | |
|
uPD98401_BURST2 | uPD98401_GMR_PM | uPD98401_GMR_DR,GMR); |
|
/* TODO: should shrink allocation now */ |
|
printk("mem=%dkB,%s (",zatm_dev->mem >> 10,zatm_dev->copper ? "UTP" : |
|
"MMF"); |
|
for (i = 0; i < ESI_LEN; i++) |
|
printk("%02X%s",dev->esi[i],i == ESI_LEN-1 ? ")\n" : "-"); |
|
do { |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(&zatm_dev->lock, flags); |
|
t0 = zpeekl(zatm_dev,uPD98401_TSR); |
|
udelay(10); |
|
t1 = zpeekl(zatm_dev,uPD98401_TSR); |
|
udelay(1010); |
|
t2 = zpeekl(zatm_dev,uPD98401_TSR); |
|
spin_unlock_irqrestore(&zatm_dev->lock, flags); |
|
} |
|
while (t0 > t1 || t1 > t2); /* loop if wrapping ... */ |
|
zatm_dev->khz = t2-2*t1+t0; |
|
printk(KERN_NOTICE DEV_LABEL "(itf %d): uPD98401 %d.%d at %d.%03d " |
|
"MHz\n",dev->number, |
|
(zin(VER) & uPD98401_MAJOR) >> uPD98401_MAJOR_SHIFT, |
|
zin(VER) & uPD98401_MINOR,zatm_dev->khz/1000,zatm_dev->khz % 1000); |
|
return uPD98402_init(dev); |
|
} |
|
|
|
|
|
static int zatm_start(struct atm_dev *dev) |
|
{ |
|
struct zatm_dev *zatm_dev = ZATM_DEV(dev); |
|
struct pci_dev *pdev = zatm_dev->pci_dev; |
|
unsigned long curr; |
|
int pools,vccs,rx; |
|
int error, i, ld; |
|
|
|
DPRINTK("zatm_start\n"); |
|
zatm_dev->rx_map = zatm_dev->tx_map = NULL; |
|
for (i = 0; i < NR_MBX; i++) |
|
zatm_dev->mbx_start[i] = 0; |
|
error = request_irq(zatm_dev->irq, zatm_int, IRQF_SHARED, DEV_LABEL, dev); |
|
if (error < 0) { |
|
printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n", |
|
dev->number,zatm_dev->irq); |
|
goto done; |
|
} |
|
/* define memory regions */ |
|
pools = NR_POOLS; |
|
if (NR_SHAPERS*SHAPER_SIZE > pools*POOL_SIZE) |
|
pools = NR_SHAPERS*SHAPER_SIZE/POOL_SIZE; |
|
vccs = (zatm_dev->mem-NR_SHAPERS*SHAPER_SIZE-pools*POOL_SIZE)/ |
|
(2*VC_SIZE+RX_SIZE); |
|
ld = -1; |
|
for (rx = 1; rx < vccs; rx <<= 1) ld++; |
|
dev->ci_range.vpi_bits = 0; /* @@@ no VPI for now */ |
|
dev->ci_range.vci_bits = ld; |
|
dev->link_rate = ATM_OC3_PCR; |
|
zatm_dev->chans = vccs; /* ??? */ |
|
curr = rx*RX_SIZE/4; |
|
DPRINTK("RX pool 0x%08lx\n",curr); |
|
zpokel(zatm_dev,curr,uPD98401_PMA); /* receive pool */ |
|
zatm_dev->pool_base = curr; |
|
curr += pools*POOL_SIZE/4; |
|
DPRINTK("Shapers 0x%08lx\n",curr); |
|
zpokel(zatm_dev,curr,uPD98401_SMA); /* shapers */ |
|
curr += NR_SHAPERS*SHAPER_SIZE/4; |
|
DPRINTK("Free 0x%08lx\n",curr); |
|
zpokel(zatm_dev,curr,uPD98401_TOS); /* free pool */ |
|
printk(KERN_INFO DEV_LABEL "(itf %d): %d shapers, %d pools, %d RX, " |
|
"%ld VCs\n",dev->number,NR_SHAPERS,pools,rx, |
|
(zatm_dev->mem-curr*4)/VC_SIZE); |
|
/* create mailboxes */ |
|
for (i = 0; i < NR_MBX; i++) { |
|
void *mbx; |
|
dma_addr_t mbx_dma; |
|
|
|
if (!mbx_entries[i]) |
|
continue; |
|
mbx = dma_alloc_coherent(&pdev->dev, |
|
2 * MBX_SIZE(i), &mbx_dma, GFP_KERNEL); |
|
if (!mbx) { |
|
error = -ENOMEM; |
|
goto out; |
|
} |
|
/* |
|
* Alignment provided by dma_alloc_coherent() isn't enough |
|
* for this device. |
|
*/ |
|
if (((unsigned long)mbx ^ mbx_dma) & 0xffff) { |
|
printk(KERN_ERR DEV_LABEL "(itf %d): system " |
|
"bus incompatible with driver\n", dev->number); |
|
dma_free_coherent(&pdev->dev, 2*MBX_SIZE(i), mbx, mbx_dma); |
|
error = -ENODEV; |
|
goto out; |
|
} |
|
DPRINTK("mbx@0x%08lx-0x%08lx\n", mbx, mbx + MBX_SIZE(i)); |
|
zatm_dev->mbx_start[i] = (unsigned long)mbx; |
|
zatm_dev->mbx_dma[i] = mbx_dma; |
|
zatm_dev->mbx_end[i] = (zatm_dev->mbx_start[i] + MBX_SIZE(i)) & |
|
0xffff; |
|
zout(mbx_dma >> 16, MSH(i)); |
|
zout(mbx_dma, MSL(i)); |
|
zout(zatm_dev->mbx_end[i], MBA(i)); |
|
zout((unsigned long)mbx & 0xffff, MTA(i)); |
|
zout((unsigned long)mbx & 0xffff, MWA(i)); |
|
} |
|
error = start_tx(dev); |
|
if (error) |
|
goto out; |
|
error = start_rx(dev); |
|
if (error) |
|
goto out_tx; |
|
error = dev->phy->start(dev); |
|
if (error) |
|
goto out_rx; |
|
zout(0xffffffff,IMR); /* enable interrupts */ |
|
/* enable TX & RX */ |
|
zout(zin(GMR) | uPD98401_GMR_SE | uPD98401_GMR_RE,GMR); |
|
done: |
|
return error; |
|
|
|
out_rx: |
|
kfree(zatm_dev->rx_map); |
|
out_tx: |
|
kfree(zatm_dev->tx_map); |
|
out: |
|
while (i-- > 0) { |
|
dma_free_coherent(&pdev->dev, 2 * MBX_SIZE(i), |
|
(void *)zatm_dev->mbx_start[i], |
|
zatm_dev->mbx_dma[i]); |
|
} |
|
free_irq(zatm_dev->irq, dev); |
|
goto done; |
|
} |
|
|
|
|
|
static void zatm_close(struct atm_vcc *vcc) |
|
{ |
|
DPRINTK(">zatm_close\n"); |
|
if (!ZATM_VCC(vcc)) return; |
|
clear_bit(ATM_VF_READY,&vcc->flags); |
|
close_rx(vcc); |
|
EVENT("close_tx\n",0,0); |
|
close_tx(vcc); |
|
DPRINTK("zatm_close: done waiting\n"); |
|
/* deallocate memory */ |
|
kfree(ZATM_VCC(vcc)); |
|
vcc->dev_data = NULL; |
|
clear_bit(ATM_VF_ADDR,&vcc->flags); |
|
} |
|
|
|
|
|
static int zatm_open(struct atm_vcc *vcc) |
|
{ |
|
struct zatm_vcc *zatm_vcc; |
|
short vpi = vcc->vpi; |
|
int vci = vcc->vci; |
|
int error; |
|
|
|
DPRINTK(">zatm_open\n"); |
|
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_AAL5) return -EINVAL; /* @@@ AAL0 */ |
|
DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi, |
|
vcc->vci); |
|
if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) { |
|
zatm_vcc = kmalloc(sizeof(*zatm_vcc), GFP_KERNEL); |
|
if (!zatm_vcc) { |
|
clear_bit(ATM_VF_ADDR,&vcc->flags); |
|
return -ENOMEM; |
|
} |
|
vcc->dev_data = zatm_vcc; |
|
ZATM_VCC(vcc)->tx_chan = 0; /* for zatm_close after open_rx */ |
|
if ((error = open_rx_first(vcc))) { |
|
zatm_close(vcc); |
|
return error; |
|
} |
|
if ((error = open_tx_first(vcc))) { |
|
zatm_close(vcc); |
|
return error; |
|
} |
|
} |
|
if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0; |
|
if ((error = open_rx_second(vcc))) { |
|
zatm_close(vcc); |
|
return error; |
|
} |
|
if ((error = open_tx_second(vcc))) { |
|
zatm_close(vcc); |
|
return error; |
|
} |
|
set_bit(ATM_VF_READY,&vcc->flags); |
|
return 0; |
|
} |
|
|
|
|
|
static int zatm_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flags) |
|
{ |
|
printk("Not yet implemented\n"); |
|
return -ENOSYS; |
|
/* @@@ */ |
|
} |
|
|
|
|
|
static int zatm_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg) |
|
{ |
|
struct zatm_dev *zatm_dev; |
|
unsigned long flags; |
|
|
|
zatm_dev = ZATM_DEV(dev); |
|
switch (cmd) { |
|
case ZATM_GETPOOLZ: |
|
if (!capable(CAP_NET_ADMIN)) return -EPERM; |
|
fallthrough; |
|
case ZATM_GETPOOL: |
|
{ |
|
struct zatm_pool_info info; |
|
int pool; |
|
|
|
if (get_user(pool, |
|
&((struct zatm_pool_req __user *) arg)->pool_num)) |
|
return -EFAULT; |
|
if (pool < 0 || pool > ZATM_LAST_POOL) |
|
return -EINVAL; |
|
pool = array_index_nospec(pool, |
|
ZATM_LAST_POOL + 1); |
|
spin_lock_irqsave(&zatm_dev->lock, flags); |
|
info = zatm_dev->pool_info[pool]; |
|
if (cmd == ZATM_GETPOOLZ) { |
|
zatm_dev->pool_info[pool].rqa_count = 0; |
|
zatm_dev->pool_info[pool].rqu_count = 0; |
|
} |
|
spin_unlock_irqrestore(&zatm_dev->lock, flags); |
|
return copy_to_user( |
|
&((struct zatm_pool_req __user *) arg)->info, |
|
&info,sizeof(info)) ? -EFAULT : 0; |
|
} |
|
case ZATM_SETPOOL: |
|
{ |
|
struct zatm_pool_info info; |
|
int pool; |
|
|
|
if (!capable(CAP_NET_ADMIN)) return -EPERM; |
|
if (get_user(pool, |
|
&((struct zatm_pool_req __user *) arg)->pool_num)) |
|
return -EFAULT; |
|
if (pool < 0 || pool > ZATM_LAST_POOL) |
|
return -EINVAL; |
|
pool = array_index_nospec(pool, |
|
ZATM_LAST_POOL + 1); |
|
if (copy_from_user(&info, |
|
&((struct zatm_pool_req __user *) arg)->info, |
|
sizeof(info))) return -EFAULT; |
|
if (!info.low_water) |
|
info.low_water = zatm_dev-> |
|
pool_info[pool].low_water; |
|
if (!info.high_water) |
|
info.high_water = zatm_dev-> |
|
pool_info[pool].high_water; |
|
if (!info.next_thres) |
|
info.next_thres = zatm_dev-> |
|
pool_info[pool].next_thres; |
|
if (info.low_water >= info.high_water || |
|
info.low_water < 0) |
|
return -EINVAL; |
|
spin_lock_irqsave(&zatm_dev->lock, flags); |
|
zatm_dev->pool_info[pool].low_water = |
|
info.low_water; |
|
zatm_dev->pool_info[pool].high_water = |
|
info.high_water; |
|
zatm_dev->pool_info[pool].next_thres = |
|
info.next_thres; |
|
spin_unlock_irqrestore(&zatm_dev->lock, flags); |
|
return 0; |
|
} |
|
default: |
|
if (!dev->phy->ioctl) return -ENOIOCTLCMD; |
|
return dev->phy->ioctl(dev,cmd,arg); |
|
} |
|
} |
|
|
|
static int zatm_send(struct atm_vcc *vcc,struct sk_buff *skb) |
|
{ |
|
int error; |
|
|
|
EVENT(">zatm_send 0x%lx\n",(unsigned long) skb,0); |
|
if (!ZATM_VCC(vcc)->tx_chan || !test_bit(ATM_VF_READY,&vcc->flags)) { |
|
if (vcc->pop) vcc->pop(vcc,skb); |
|
else dev_kfree_skb(skb); |
|
return -EINVAL; |
|
} |
|
if (!skb) { |
|
printk(KERN_CRIT "!skb in zatm_send ?\n"); |
|
if (vcc->pop) vcc->pop(vcc,skb); |
|
return -EINVAL; |
|
} |
|
ATM_SKB(skb)->vcc = vcc; |
|
error = do_tx(skb); |
|
if (error != RING_BUSY) return error; |
|
skb_queue_tail(&ZATM_VCC(vcc)->backlog,skb); |
|
return 0; |
|
} |
|
|
|
|
|
static void zatm_phy_put(struct atm_dev *dev,unsigned char value, |
|
unsigned long addr) |
|
{ |
|
struct zatm_dev *zatm_dev; |
|
|
|
zatm_dev = ZATM_DEV(dev); |
|
zwait(); |
|
zout(value,CER); |
|
zout(uPD98401_IND_ACC | uPD98401_IA_B0 | |
|
(uPD98401_IA_TGT_PHY << uPD98401_IA_TGT_SHIFT) | addr,CMR); |
|
} |
|
|
|
|
|
static unsigned char zatm_phy_get(struct atm_dev *dev,unsigned long addr) |
|
{ |
|
struct zatm_dev *zatm_dev; |
|
|
|
zatm_dev = ZATM_DEV(dev); |
|
zwait(); |
|
zout(uPD98401_IND_ACC | uPD98401_IA_B0 | uPD98401_IA_RW | |
|
(uPD98401_IA_TGT_PHY << uPD98401_IA_TGT_SHIFT) | addr,CMR); |
|
zwait(); |
|
return zin(CER) & 0xff; |
|
} |
|
|
|
|
|
static const struct atmdev_ops ops = { |
|
.open = zatm_open, |
|
.close = zatm_close, |
|
.ioctl = zatm_ioctl, |
|
.send = zatm_send, |
|
.phy_put = zatm_phy_put, |
|
.phy_get = zatm_phy_get, |
|
.change_qos = zatm_change_qos, |
|
}; |
|
|
|
static int zatm_init_one(struct pci_dev *pci_dev, |
|
const struct pci_device_id *ent) |
|
{ |
|
struct atm_dev *dev; |
|
struct zatm_dev *zatm_dev; |
|
int ret = -ENOMEM; |
|
|
|
zatm_dev = kmalloc(sizeof(*zatm_dev), GFP_KERNEL); |
|
if (!zatm_dev) { |
|
printk(KERN_EMERG "%s: memory shortage\n", DEV_LABEL); |
|
goto out; |
|
} |
|
|
|
dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL); |
|
if (!dev) |
|
goto out_free; |
|
|
|
ret = pci_enable_device(pci_dev); |
|
if (ret < 0) |
|
goto out_deregister; |
|
|
|
ret = pci_request_regions(pci_dev, DEV_LABEL); |
|
if (ret < 0) |
|
goto out_disable; |
|
|
|
ret = dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(32)); |
|
if (ret < 0) |
|
goto out_release; |
|
|
|
zatm_dev->pci_dev = pci_dev; |
|
dev->dev_data = zatm_dev; |
|
zatm_dev->copper = (int)ent->driver_data; |
|
if ((ret = zatm_init(dev)) || (ret = zatm_start(dev))) |
|
goto out_release; |
|
|
|
pci_set_drvdata(pci_dev, dev); |
|
zatm_dev->more = zatm_boards; |
|
zatm_boards = dev; |
|
ret = 0; |
|
out: |
|
return ret; |
|
|
|
out_release: |
|
pci_release_regions(pci_dev); |
|
out_disable: |
|
pci_disable_device(pci_dev); |
|
out_deregister: |
|
atm_dev_deregister(dev); |
|
out_free: |
|
kfree(zatm_dev); |
|
goto out; |
|
} |
|
|
|
|
|
MODULE_LICENSE("GPL"); |
|
|
|
static const struct pci_device_id zatm_pci_tbl[] = { |
|
{ PCI_VDEVICE(ZEITNET, PCI_DEVICE_ID_ZEITNET_1221), ZATM_COPPER }, |
|
{ PCI_VDEVICE(ZEITNET, PCI_DEVICE_ID_ZEITNET_1225), 0 }, |
|
{ 0, } |
|
}; |
|
MODULE_DEVICE_TABLE(pci, zatm_pci_tbl); |
|
|
|
static struct pci_driver zatm_driver = { |
|
.name = DEV_LABEL, |
|
.id_table = zatm_pci_tbl, |
|
.probe = zatm_init_one, |
|
}; |
|
|
|
static int __init zatm_init_module(void) |
|
{ |
|
return pci_register_driver(&zatm_driver); |
|
} |
|
|
|
module_init(zatm_init_module); |
|
/* module_exit not defined so not unloadable */
|
|
|