/* drivers/atm/eni.c - Efficient Networks ENI155P device driver */ /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "tonga.h" #include "midway.h" #include "suni.h" #include "eni.h" #if !defined(__i386__) && !defined(__x86_64__) #ifndef ioremap_nocache #define ioremap_nocache(X,Y) ioremap(X,Y) #endif #endif /* * TODO: * * Show stoppers * none * * Minor * - OAM support * - fix bugs listed below */ /* * KNOWN BUGS: * * - may run into JK-JK bug and deadlock * - should allocate UBR channel first * - buffer space allocation algorithm is stupid * (RX: should be maxSDU+maxdelay*rate * TX: should be maxSDU+min(maxSDU,maxdelay*rate) ) * - doesn't support OAM cells * - eni_put_free may hang if not putting memory fragments that _complete_ * 2^n block (never happens in real life, though) */ #if 0 #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args) #else #define DPRINTK(format,args...) #endif #ifndef CONFIG_ATM_ENI_TUNE_BURST #define CONFIG_ATM_ENI_BURST_TX_8W #define CONFIG_ATM_ENI_BURST_RX_4W #endif #ifndef CONFIG_ATM_ENI_DEBUG #define NULLCHECK(x) #define EVENT(s,a,b) static void event_dump(void) { } #else /* * NULL pointer checking */ #define NULLCHECK(x) \ if ((unsigned long) (x) < 0x30) \ printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x)) /* * Very extensive activity logging. Greatly improves bug detection speed but * costs a few Mbps if enabled. */ #define EV 64 static const char *ev[EV]; static unsigned long ev_a[EV],ev_b[EV]; static int ec = 0; static void EVENT(const char *s,unsigned long a,unsigned long b) { ev[ec] = s; ev_a[ec] = a; ev_b[ec] = b; ec = (ec+1) % EV; } static void event_dump(void) { int n,i; for (n = 0; n < EV; n++) { i = (ec+n) % EV; printk(KERN_NOTICE); printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]); } } #endif /* CONFIG_ATM_ENI_DEBUG */ /* * NExx must not be equal at end * EExx may be equal at end * xxPJOK verify validity of pointer jumps * xxPMOK operating on a circular buffer of "c" words */ #define NEPJOK(a0,a1,b) \ ((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1)) #define EEPJOK(a0,a1,b) \ ((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1)) #define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b) #define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b) static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0, backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0, putting = 0; static struct atm_dev *eni_boards = NULL; /* Read/write registers on card */ #define eni_in(r) readl(eni_dev->reg+(r)*4) #define eni_out(v,r) writel((v),eni_dev->reg+(r)*4) /*-------------------------------- utilities --------------------------------*/ static void dump_mem(struct eni_dev *eni_dev) { int i; for (i = 0; i < eni_dev->free_len; i++) printk(KERN_DEBUG " %d: %p %d\n",i, eni_dev->free_list[i].start, 1 << eni_dev->free_list[i].order); } static void dump(struct atm_dev *dev) { struct eni_dev *eni_dev; int i; eni_dev = ENI_DEV(dev); printk(KERN_NOTICE "Free memory\n"); dump_mem(eni_dev); printk(KERN_NOTICE "TX buffers\n"); for (i = 0; i < NR_CHAN; i++) if (eni_dev->tx[i].send) printk(KERN_NOTICE " TX %d @ %p: %ld\n",i, eni_dev->tx[i].send,eni_dev->tx[i].words*4); printk(KERN_NOTICE "RX buffers\n"); for (i = 0; i < 1024; i++) if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx) printk(KERN_NOTICE " RX %d @ %p: %ld\n",i, ENI_VCC(eni_dev->rx_map[i])->recv, ENI_VCC(eni_dev->rx_map[i])->words*4); printk(KERN_NOTICE "----\n"); } static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start, unsigned long size) { struct eni_free *list; int len,order; DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size); start += eni_dev->base_diff; list = eni_dev->free_list; len = eni_dev->free_len; while (size) { if (len >= eni_dev->free_list_size) { printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n", start,size); break; } for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++); if (MID_MIN_BUF_SIZE > (1 << order)) { printk(KERN_CRIT "eni_put_free: order %d too small\n", order); break; } list[len].start = (void __iomem *) start; list[len].order = order; len++; start += 1 << order; size -= 1 << order; } eni_dev->free_len = len; /*dump_mem(eni_dev);*/ } static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size) { struct eni_free *list; void __iomem *start; int len,i,order,best_order,index; list = eni_dev->free_list; len = eni_dev->free_len; if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE; if (*size > MID_MAX_BUF_SIZE) return NULL; for (order = 0; (1 << order) < *size; order++); DPRINTK("trying: %ld->%d\n",*size,order); best_order = 65; /* we don't have more than 2^64 of anything ... */ index = 0; /* silence GCC */ for (i = 0; i < len; i++) if (list[i].order == order) { best_order = order; index = i; break; } else if (best_order > list[i].order && list[i].order > order) { best_order = list[i].order; index = i; } if (best_order == 65) return NULL; start = list[index].start-eni_dev->base_diff; list[index] = list[--len]; eni_dev->free_len = len; *size = 1 << order; eni_put_free(eni_dev,start+*size,(1 << best_order)-*size); DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start); memset_io(start,0,*size); /* never leak data */ /*dump_mem(eni_dev);*/ return start; } static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start, unsigned long size) { struct eni_free *list; int len,i,order; start += eni_dev->base_diff; list = eni_dev->free_list; len = eni_dev->free_len; for (order = -1; size; order++) size >>= 1; DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order); for (i = 0; i < len; i++) if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) && list[i].order == order) { DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i, list[i].start,start,1 << order,list[i].order,order); list[i] = list[--len]; start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order)); order++; i = -1; continue; } if (len >= eni_dev->free_list_size) { printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start, order); return; } list[len].start = start; list[len].order = order; eni_dev->free_len = len+1; /*dump_mem(eni_dev);*/ } /*----------------------------------- RX ------------------------------------*/ #define ENI_VCC_NOS ((struct atm_vcc *) 1) static void rx_ident_err(struct atm_vcc *vcc) { struct atm_dev *dev; struct eni_dev *eni_dev; struct eni_vcc *eni_vcc; dev = vcc->dev; eni_dev = ENI_DEV(dev); /* immediately halt adapter */ eni_out(eni_in(MID_MC_S) & ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S); /* dump useful information */ eni_vcc = ENI_VCC(vcc); printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident " "mismatch\n",dev->number); printk(KERN_ALERT " VCI %d, rxing %d, words %ld\n",vcc->vci, eni_vcc->rxing,eni_vcc->words); printk(KERN_ALERT " host descr 0x%lx, rx pos 0x%lx, descr value " "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos, (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4)); printk(KERN_ALERT " last %p, servicing %d\n",eni_vcc->last, eni_vcc->servicing); EVENT("---dump ends here---\n",0,0); printk(KERN_NOTICE "---recent events---\n"); event_dump(); ENI_DEV(dev)->fast = NULL; /* really stop it */ ENI_DEV(dev)->slow = NULL; skb_queue_head_init(&ENI_DEV(dev)->rx_queue); } static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb, unsigned long skip,unsigned long size,unsigned long eff) { struct eni_dev *eni_dev; struct eni_vcc *eni_vcc; u32 dma_rd,dma_wr; u32 dma[RX_DMA_BUF*2]; dma_addr_t paddr; unsigned long here; int i,j; eni_dev = ENI_DEV(vcc->dev); eni_vcc = ENI_VCC(vcc); paddr = 0; /* GCC, shut up */ if (skb) { paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len, PCI_DMA_FROMDEVICE); ENI_PRV_PADDR(skb) = paddr; if (paddr & 3) printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has " "mis-aligned RX data (0x%lx)\n",vcc->dev->number, vcc->vci,(unsigned long) paddr); ENI_PRV_SIZE(skb) = size+skip; /* PDU plus descriptor */ ATM_SKB(skb)->vcc = vcc; } j = 0; if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */ here = (eni_vcc->descr+skip) & (eni_vcc->words-1); dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK; j++; } here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1); if (!eff) size += skip; else { unsigned long words; if (!size) { DPRINTK("strange things happen ...\n"); EVENT("strange things happen ... (skip=%ld,eff=%ld)\n", size,eff); } words = eff; if (paddr & 15) { unsigned long init; init = 4-((paddr & 15) >> 2); if (init > words) init = words; dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) | (vcc->vci << MID_DMA_VCI_SHIFT); dma[j++] = paddr; paddr += init << 2; words -= init; } #ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */ if (words & ~15) { dma[j++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT) | (vcc->vci << MID_DMA_VCI_SHIFT); dma[j++] = paddr; paddr += (words & ~15) << 2; words &= 15; } #endif #ifdef CONFIG_ATM_ENI_BURST_RX_8W /* works only with *some* PCI chipsets ... */ if (words & ~7) { dma[j++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT) | (vcc->vci << MID_DMA_VCI_SHIFT); dma[j++] = paddr; paddr += (words & ~7) << 2; words &= 7; } #endif #ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */ if (words & ~3) { dma[j++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT) | (vcc->vci << MID_DMA_VCI_SHIFT); dma[j++] = paddr; paddr += (words & ~3) << 2; words &= 3; } #endif #ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */ if (words & ~1) { dma[j++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT) | (vcc->vci << MID_DMA_VCI_SHIFT); dma[j++] = paddr; paddr += (words & ~1) << 2; words &= 1; } #endif if (words) { dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) | (vcc->vci << MID_DMA_VCI_SHIFT); dma[j++] = paddr; } } if (size != eff) { dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK; j++; } if (!j || j > 2*RX_DMA_BUF) { printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n"); goto trouble; } dma[j-2] |= MID_DMA_END; j = j >> 1; dma_wr = eni_in(MID_DMA_WR_RX); dma_rd = eni_in(MID_DMA_RD_RX); /* * Can I move the dma_wr pointer by 2j+1 positions without overwriting * data that hasn't been read (position of dma_rd) yet ? */ if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */ printk(KERN_WARNING DEV_LABEL /* * Copyright 2006 PathScale, Inc. All Rights Reserved. * * This file is free software; you can redistribute it and/or modify * it under the terms of version 2 of the GNU General Public License * as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */ #include <linux/module.h> #include <linux/io.h> /** * __iowrite32_copy - copy data to MMIO space, in 32-bit units * @to: destination, in MMIO space (must be 32-bit aligned) * @from: source (must be 32-bit aligned) * @count: number of 32-bit quantities to copy * * Copy data from kernel space to MMIO space, in units of 32 bits at a * time. Order of access is not guaranteed, nor is a memory barrier * performed afterwards. */ void __attribute__((weak)) __iowrite32_copy(void __iomem *to, const void *from, size_t count) { u32 __iomem *dst = to; const u32 *src = from; const u32 *end = src + count; while (src < end) __raw_writel(*src++, dst++); } EXPORT_SYMBOL_GPL(__iowrite32_copy); /** * __iowrite64_copy - copy data to MMIO space, in 64-bit or 32-bit units * @to: destination, in MMIO space (must be 64-bit aligned) * @from: source (must be 64-bit aligned) * @count: number of 64-bit quantities to copy * * Copy data from kernel space to MMIO space, in units of 32 or 64 bits at a * time. Order of access is not guaranteed, nor is a memory barrier * performed afterwards. */ void __attribute__((weak)) __iowrite64_copy(void __iomem *to, const void *from, size_t count) { #ifdef CONFIG_64BIT u64 __iomem *dst = to; const u64 *src = from; const u64 *end = src + count; while (src < end) __raw_writeq(*src++, dst++); #else __iowrite32_copy(to, from, count * 2); #endif } EXPORT_SYMBOL_GPL(__iowrite64_copy);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-28 15:37:17 -0500
ev->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); pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len, PCI_DMA_TODEVICE); 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; 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; } paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len, PCI_DMA_TODEVICE); 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_shinfo(skb)->frags[i].page_offset, 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->data[3] & 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); pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len, PCI_DMA_TODEVICE); 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[] __devinitconst = { "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 __devinit 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 __devinit 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 __devinit 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_nocache(real_base,MAP_MAX_SIZE))) { printk("\n"); printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page " "mapping\n",dev->number); return error; } 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) & DAUGTHER_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 __devinit 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( sizeof(struct eni_free)*(eni_dev->free_list_size+1),GFP_KERNEL); if (!eni_dev->free_list) { printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n", dev->number); error = -ENOMEM; goto free_irq; } eni_dev->free_len = 0; eni_put_free(eni_dev,buf,buffer_mem); memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */ /* * byte_addr free (k) * 0x00000000 512 VCI table * 0x00004000 496 RX DMA * 0x00005000 492 TX DMA * 0x00006000 488 service list * 0x00007000 484 buffers * 0x00080000 0 end (512kB) */ eni_out(0xffffffff,MID_IE); error = start_tx(dev); if (error) goto free_list; error = start_rx(dev); if (error) goto free_list; error = dev->phy->start(dev); if (error) goto free_list; eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) | MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE, MID_MC_S); /* Tonga uses SBus INTReq1 */ (void) eni_in(MID_ISA); /* clear Midway interrupts */ return 0; free_list: kfree(eni_dev->free_list); free_irq: free_irq(eni_dev->irq, dev); out: return error; } static void eni_close(struct atm_vcc *vcc) { DPRINTK(">eni_close\n"); if (!ENI_VCC(vcc)) return; clear_bit(ATM_VF_READY,&vcc->flags); close_rx(vcc); close_tx(vcc); DPRINTK("eni_close: done waiting\n"); /* deallocate memory */ kfree(ENI_VCC(vcc)); vcc->dev_data = NULL; clear_bit(ATM_VF_ADDR,&vcc->flags); /*foo();*/ } static int eni_open(struct atm_vcc *vcc) { struct eni_vcc *eni_vcc; int error; short vpi = vcc->vpi; int vci = vcc->vci; DPRINTK(">eni_open\n"); EVENT("eni_open\n",0,0); if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) vcc->dev_data = NULL; if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC) set_bit(ATM_VF_ADDR,&vcc->flags); if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5) return -EINVAL; DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi, vcc->vci); if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) { eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL); if (!eni_vcc) return -ENOMEM; vcc->dev_data = eni_vcc; eni_vcc->tx = NULL; /* for eni_close after open_rx */ if ((error = open_rx_first(vcc))) { eni_close(vcc); return error; } if ((error = open_tx_first(vcc))) { eni_close(vcc); return error; } } if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0; if ((error = open_rx_second(vcc))) { eni_close(vcc); return error; } if ((error = open_tx_second(vcc))) { eni_close(vcc); return error; } set_bit(ATM_VF_READY,&vcc->flags); /* should power down SUNI while !ref_count @@@ */ return 0; } static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs) { struct eni_dev *eni_dev = ENI_DEV(vcc->dev); struct eni_tx *tx = ENI_VCC(vcc)->tx; struct sk_buff *skb; int error,rate,rsv,shp; if (qos->txtp.traffic_class == ATM_NONE) return 0; if (tx == eni_dev->ubr) return -EBADFD; rate = atm_pcr_goal(&qos->txtp); if (rate < 0) rate = -rate; rsv = shp = 0; if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1; if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1; if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1; if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1; if (!rsv && !shp) return 0; error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp); if (error) return error; if (shp && !(flgs & ATM_MF_IMMED)) return 0; /* * Walk through the send buffer and patch the rate information in all * segmentation buffer descriptors of this VCC. */ tasklet_disable(&eni_dev->task); skb_queue_walk(&eni_dev->tx_queue, skb) { void __iomem *dsc; if (ATM_SKB(skb)->vcc != vcc) continue; dsc = tx->send+ENI_PRV_POS(skb)*4; writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) | (tx->prescaler << MID_SEG_PR_SHIFT) | (tx->resolution << MID_SEG_RATE_SHIFT), dsc); } tasklet_enable(&eni_dev->task); return 0; } static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg) { struct eni_dev *eni_dev = ENI_DEV(dev); if (cmd == ENI_MEMDUMP) { if (!capable(CAP_NET_ADMIN)) return -EPERM; printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d " "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number); dump(dev); return 0; } if (cmd == ENI_SETMULT) { struct eni_multipliers mult; if (!capable(CAP_NET_ADMIN)) return -EPERM; if (copy_from_user(&mult, arg, sizeof(struct eni_multipliers))) return -EFAULT; if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) || mult.tx > 65536 || mult.rx > 65536) return -EINVAL; if (mult.tx) eni_dev->tx_mult = mult.tx; if (mult.rx) eni_dev->rx_mult = mult.rx; return 0; } if (cmd == ATM_SETCIRANGE) { struct atm_cirange ci; if (copy_from_user(&ci, arg,sizeof(struct atm_cirange))) return -EFAULT; if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) && (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX)) return 0; return -EINVAL; } if (!dev->phy->ioctl) return -ENOIOCTLCMD; return dev->phy->ioctl(dev,cmd,arg); } static int eni_getsockopt(struct atm_vcc *vcc,int level,int optname, void __user *optval,int optlen) { return -EINVAL; } static int eni_setsockopt(struct atm_vcc *vcc,int level,int optname, void __user *optval,unsigned int optlen) { return -EINVAL; } static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb) { enum enq_res res; DPRINTK(">eni_send\n"); if (!ENI_VCC(vcc)->tx) { if (vcc->pop) vcc->pop(vcc,skb); else dev_kfree_skb(skb); return -EINVAL; } if (!skb) { printk(KERN_CRIT "!skb in eni_send ?\n"); if (vcc->pop) vcc->pop(vcc,skb); return -EINVAL; } if (vcc->qos.aal == ATM_AAL0) { if (skb->len != ATM_CELL_SIZE-1) { if (vcc->pop) vcc->pop(vcc,skb); else dev_kfree_skb(skb); return -EINVAL; } *(u32 *) skb->data = htonl(*(u32 *) skb->data); } submitted++; ATM_SKB(skb)->vcc = vcc; tasklet_disable(&ENI_DEV(vcc->dev)->task); res = do_tx(skb); tasklet_enable(&ENI_DEV(vcc->dev)->task); if (res == enq_ok) return 0; skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb); backlogged++; tasklet_schedule(&ENI_DEV(vcc->dev)->task); return 0; } static void eni_phy_put(struct atm_dev *dev,unsigned char value, unsigned long addr) { writel(value,ENI_DEV(dev)->phy+addr*4); } static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr) { return readl(ENI_DEV(dev)->phy+addr*4); } static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page) { struct hlist_node *node; struct sock *s; static const char *signal[] = { "LOST","unknown","okay" }; struct eni_dev *eni_dev = ENI_DEV(dev); struct atm_vcc *vcc; int left,i; left = *pos; if (!left) return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, " "%d cps remaining\n",dev->number,signal[(int) dev->signal], eni_dev->mem >> 10,eni_dev->tx_bw); if (!--left) return sprintf(page,"%4sBursts: TX" #if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \ !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \ !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \ !defined(CONFIG_ATM_ENI_BURST_TX_2W) " none" #endif #ifdef CONFIG_ATM_ENI_BURST_TX_16W " 16W" #endif #ifdef CONFIG_ATM_ENI_BURST_TX_8W " 8W" #endif #ifdef CONFIG_ATM_ENI_BURST_TX_4W " 4W" #endif #ifdef CONFIG_ATM_ENI_BURST_TX_2W " 2W" #endif ", RX" #if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \ !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \ !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \ !defined(CONFIG_ATM_ENI_BURST_RX_2W) " none" #endif #ifdef CONFIG_ATM_ENI_BURST_RX_16W " 16W" #endif #ifdef CONFIG_ATM_ENI_BURST_RX_8W " 8W" #endif #ifdef CONFIG_ATM_ENI_BURST_RX_4W " 4W" #endif #ifdef CONFIG_ATM_ENI_BURST_RX_2W " 2W" #endif #ifndef CONFIG_ATM_ENI_TUNE_BURST " (default)" #endif "\n",""); if (!--left) return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n", "",eni_dev->tx_mult,eni_dev->rx_mult); for (i = 0; i < NR_CHAN; i++) { struct eni_tx *tx = eni_dev->tx+i; if (!tx->send) continue; if (!--left) { return sprintf(page,"tx[%d]: 0x%ld-0x%ld " "(%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, node, 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%ld-0x%ld " "(%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, .getsockopt = eni_getsockopt, .setsockopt = eni_setsockopt, .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 __devinit 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 = -ENOMEM; eni_dev = kmalloc(sizeof(struct eni_dev), GFP_KERNEL); if (!eni_dev) goto err_disable; zero = &eni_dev->zero; zero->addr = pci_alloc_consistent(pci_dev, ENI_ZEROES_SIZE, &zero->dma); 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: eni_do_release(dev); err_unregister: atm_dev_deregister(dev); err_free_consistent: pci_free_consistent(pci_dev, ENI_ZEROES_SIZE, zero->addr, zero->dma); err_kfree: kfree(eni_dev); err_disable: pci_disable_device(pci_dev); goto out; } static 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 __devexit 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); pci_free_consistent(pdev, 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 = __devexit_p(eni_remove_one), }; static int __init eni_init(void) { struct sk_buff *skb; /* dummy for sizeof */ if (sizeof(skb->cb) < sizeof(struct eni_skb_prv)) { printk(KERN_ERR "eni_detect: skb->cb is too small (%Zd < %Zd)\n", sizeof(skb->cb),sizeof(struct eni_skb_prv)); return -EIO; } return pci_register_driver(&eni_driver); } module_init(eni_init); /* @@@ since exit routine not defined, this module can not be unloaded */ MODULE_LICENSE("GPL");