drivers/atm/eni.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /* drivers/atm/eni.c - Efficient Networks ENI155P device driver */
0003
0004 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
0005
0006
0007 #include <linux/module.h>
0008 #include <linux/kernel.h>
0009 #include <linux/mm.h>
0010 #include <linux/pci.h>
0011 #include <linux/errno.h>
0012 #include <linux/atm.h>
0013 #include <linux/atmdev.h>
0014 #include <linux/sonet.h>
0015 #include <linux/skbuff.h>
0016 #include <linux/time.h>
0017 #include <linux/delay.h>
0018 #include <linux/uio.h>
0019 #include <linux/init.h>
0020 #include <linux/atm_eni.h>
0021 #include <linux/bitops.h>
0022 #include <linux/slab.h>
0023 #include <asm/io.h>
0024 #include <linux/atomic.h>
0025 #include <linux/uaccess.h>
0026 #include <asm/string.h>
0027 #include <asm/byteorder.h>
0028
0029 #include "tonga.h"
0030 #include "midway.h"
0031 #include "suni.h"
0032 #include "eni.h"
0033
0034 /*
0035  * TODO:
0036  *
0037  * Show stoppers
0038  *  none
0039  *
0040  * Minor
0041  *  - OAM support
0042  *  - fix bugs listed below
0043  */
0044
0045 /*
0046  * KNOWN BUGS:
0047  *
0048  * - may run into JK-JK bug and deadlock
0049  * - should allocate UBR channel first
0050  * - buffer space allocation algorithm is stupid
0051  *   (RX: should be maxSDU+maxdelay*rate
0052  *    TX: should be maxSDU+min(maxSDU,maxdelay*rate) )
0053  * - doesn't support OAM cells
0054  * - eni_put_free may hang if not putting memory fragments that _complete_
0055  *   2^n block (never happens in real life, though)
0056  */
0057
0058
0059 #if 0
0060 #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
0061 #else
0062 #define DPRINTK(format,args...)
0063 #endif
0064
0065
0066 #ifndef CONFIG_ATM_ENI_TUNE_BURST
0067 #define CONFIG_ATM_ENI_BURST_TX_8W
0068 #define CONFIG_ATM_ENI_BURST_RX_4W
0069 #endif
0070
0071
0072 #ifndef CONFIG_ATM_ENI_DEBUG
0073
0074
0075 #define NULLCHECK(x)
0076
0077 #define EVENT(s,a,b)
0078
0079
0080 static void event_dump(void)
0081 {
0082 }
0083
0084
0085 #else
0086
0087
0088 /*
0089  * NULL pointer checking
0090  */
0091
0092 #define NULLCHECK(x) \
0093     if ((unsigned long) (x) < 0x30) \
0094         printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x))
0095
0096 /*
0097  * Very extensive activity logging. Greatly improves bug detection speed but
0098  * costs a few Mbps if enabled.
0099  */
0100
0101 #define EV 64
0102
0103 static const char *ev[EV];
0104 static unsigned long ev_a[EV],ev_b[EV];
0105 static int ec = 0;
0106
0107
0108 static void EVENT(const char *s,unsigned long a,unsigned long b)
0109 {
0110     ev[ec] = s;
0111     ev_a[ec] = a;
0112     ev_b[ec] = b;
0113     ec = (ec+1) % EV;
0114 }
0115
0116
0117 static void event_dump(void)
0118 {
0119     int n,i;
0120
0121     for (n = 0; n < EV; n++) {
0122         i = (ec+n) % EV;
0123         printk(KERN_NOTICE);
0124         printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]);
0125     }
0126 }
0127
0128
0129 #endif /* CONFIG_ATM_ENI_DEBUG */
0130
0131
0132 /*
0133  * NExx   must not be equal at end
0134  * EExx   may be equal at end
0135  * xxPJOK verify validity of pointer jumps
0136  * xxPMOK operating on a circular buffer of "c" words
0137  */
0138
0139 #define NEPJOK(a0,a1,b) \
0140     ((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1))
0141 #define EEPJOK(a0,a1,b) \
0142     ((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1))
0143 #define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b)
0144 #define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b)
0145
0146
0147 static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0,
0148   backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0,
0149   putting = 0;
0150
0151 static struct atm_dev *eni_boards = NULL;
0152
0153 /* Read/write registers on card */
0154 #define eni_in(r)   readl(eni_dev->reg+(r)*4)
0155 #define eni_out(v,r)    writel((v),eni_dev->reg+(r)*4)
0156
0157
0158 /*-------------------------------- utilities --------------------------------*/
0159
0160
0161 static void dump_mem(struct eni_dev *eni_dev)
0162 {
0163     int i;
0164
0165     for (i = 0; i < eni_dev->free_len; i++)
0166         printk(KERN_DEBUG "  %d: %p %d\n",i,
0167             eni_dev->free_list[i].start,
0168             1 << eni_dev->free_list[i].order);
0169 }
0170
0171
0172 static void dump(struct atm_dev *dev)
0173 {
0174     struct eni_dev *eni_dev;
0175
0176     int i;
0177
0178     eni_dev = ENI_DEV(dev);
0179     printk(KERN_NOTICE "Free memory\n");
0180     dump_mem(eni_dev);
0181     printk(KERN_NOTICE "TX buffers\n");
0182     for (i = 0; i < NR_CHAN; i++)
0183         if (eni_dev->tx[i].send)
0184             printk(KERN_NOTICE "  TX %d @ %p: %ld\n",i,
0185                 eni_dev->tx[i].send,eni_dev->tx[i].words*4);
0186     printk(KERN_NOTICE "RX buffers\n");
0187     for (i = 0; i < 1024; i++)
0188         if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx)
0189             printk(KERN_NOTICE "  RX %d @ %p: %ld\n",i,
0190                 ENI_VCC(eni_dev->rx_map[i])->recv,
0191                 ENI_VCC(eni_dev->rx_map[i])->words*4);
0192     printk(KERN_NOTICE "----\n");
0193 }
0194
0195
0196 static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start,
0197     unsigned long size)
0198 {
0199     struct eni_free *list;
0200     int len,order;
0201
0202     DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size);
0203     start += eni_dev->base_diff;
0204     list = eni_dev->free_list;
0205     len = eni_dev->free_len;
0206     while (size) {
0207         if (len >= eni_dev->free_list_size) {
0208             printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n",
0209                 start,size);
0210             break;
0211         }
0212         for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++);
0213         if (MID_MIN_BUF_SIZE > (1 << order)) {
0214             printk(KERN_CRIT "eni_put_free: order %d too small\n",
0215                 order);
0216             break;
0217         }
0218         list[len].start = (void __iomem *) start;
0219         list[len].order = order;
0220         len++;
0221         start += 1 << order;
0222         size -= 1 << order;
0223     }
0224     eni_dev->free_len = len;
0225     /*dump_mem(eni_dev);*/
0226 }
0227
0228
0229 static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size)
0230 {
0231     struct eni_free *list;
0232     void __iomem *start;
0233     int len,i,order,best_order,index;
0234
0235     list = eni_dev->free_list;
0236     len = eni_dev->free_len;
0237     if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE;
0238     if (*size > MID_MAX_BUF_SIZE) return NULL;
0239     for (order = 0; (1 << order) < *size; order++)
0240         ;
0241     DPRINTK("trying: %ld->%d\n",*size,order);
0242     best_order = 65; /* we don't have more than 2^64 of anything ... */
0243     index = 0; /* silence GCC */
0244     for (i = 0; i < len; i++)
0245         if (list[i].order == order) {
0246             best_order = order;
0247             index = i;
0248             break;
0249         }
0250         else if (best_order > list[i].order && list[i].order > order) {
0251                 best_order = list[i].order;
0252                 index = i;
0253             }
0254     if (best_order == 65) return NULL;
0255     start = list[index].start-eni_dev->base_diff;
0256     list[index] = list[--len];
0257     eni_dev->free_len = len;
0258     *size = 1 << order;
0259     eni_put_free(eni_dev,start+*size,(1 << best_order)-*size);
0260     DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start);
0261     memset_io(start,0,*size);       /* never leak data */
0262     /*dump_mem(eni_dev);*/
0263     return start;
0264 }
0265
0266
0267 static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start,
0268     unsigned long size)
0269 {
0270     struct eni_free *list;
0271     int len,i,order;
0272
0273     start += eni_dev->base_diff;
0274     list = eni_dev->free_list;
0275     len = eni_dev->free_len;
0276     for (order = -1; size; order++) size >>= 1;
0277     DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order);
0278     for (i = 0; i < len; i++)
0279         if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) &&
0280             list[i].order == order) {
0281             DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i,
0282                 list[i].start,start,1 << order,list[i].order,order);
0283             list[i] = list[--len];
0284             start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order));
0285             order++;
0286             i = -1;
0287             continue;
0288         }
0289     if (len >= eni_dev->free_list_size) {
0290         printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start,
0291             order);
0292         return;
0293     }
0294     list[len].start = start;
0295     list[len].order = order;
0296     eni_dev->free_len = len+1;
0297     /*dump_mem(eni_dev);*/
0298 }
0299
0300
0301 /*----------------------------------- RX ------------------------------------*/
0302
0303
0304 #define ENI_VCC_NOS ((struct atm_vcc *) 1)
0305
0306
0307 static void rx_ident_err(struct atm_vcc *vcc)
0308 {
0309     struct atm_dev *dev;
0310     struct eni_dev *eni_dev;
0311     struct eni_vcc *eni_vcc;
0312
0313     dev = vcc->dev;
0314     eni_dev = ENI_DEV(dev);
0315     /* immediately halt adapter */
0316     eni_out(eni_in(MID_MC_S) &
0317         ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S);
0318     /* dump useful information */
0319     eni_vcc = ENI_VCC(vcc);
0320     printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident "
0321         "mismatch\n",dev->number);
0322     printk(KERN_ALERT "  VCI %d, rxing %d, words %ld\n",vcc->vci,
0323         eni_vcc->rxing,eni_vcc->words);
0324     printk(KERN_ALERT "  host descr 0x%lx, rx pos 0x%lx, descr value "
0325         "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos,
0326         (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4));
0327     printk(KERN_ALERT "  last %p, servicing %d\n",eni_vcc->last,
0328         eni_vcc->servicing);
0329     EVENT("---dump ends here---\n",0,0);
0330     printk(KERN_NOTICE "---recent events---\n");
0331     event_dump();
0332     ENI_DEV(dev)->fast = NULL; /* really stop it */
0333     ENI_DEV(dev)->slow = NULL;
0334     skb_queue_head_init(&ENI_DEV(dev)->rx_queue);
0335 }
0336
0337
0338 static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb,
0339     unsigned long skip,unsigned long size,unsigned long eff)
0340 {
0341     struct eni_dev *eni_dev;
0342     struct eni_vcc *eni_vcc;
0343     u32 dma_rd,dma_wr;
0344     u32 dma[RX_DMA_BUF*2];
0345     dma_addr_t paddr;
0346     unsigned long here;
0347     int i,j;
0348
0349     eni_dev = ENI_DEV(vcc->dev);
0350     eni_vcc = ENI_VCC(vcc);
0351     paddr = 0; /* GCC, shut up */
0352     if (skb) {
0353         paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len,
0354                        DMA_FROM_DEVICE);
0355         if (dma_mapping_error(&eni_dev->pci_dev->dev, paddr))
0356             goto dma_map_error;
0357         ENI_PRV_PADDR(skb) = paddr;
0358         if (paddr & 3)
0359             printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has "
0360                 "mis-aligned RX data (0x%lx)\n",vcc->dev->number,
0361                 vcc->vci,(unsigned long) paddr);
0362         ENI_PRV_SIZE(skb) = size+skip;
0363             /* PDU plus descriptor */
0364         ATM_SKB(skb)->vcc = vcc;
0365     }
0366     j = 0;
0367     if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */
0368         here = (eni_vcc->descr+skip) & (eni_vcc->words-1);
0369         dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci
0370             << MID_DMA_VCI_SHIFT) | MID_DT_JK;
0371         dma[j++] = 0;
0372     }
0373     here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1);
0374     if (!eff) size += skip;
0375     else {
0376         unsigned long words;
0377
0378         if (!size) {
0379             DPRINTK("strange things happen ...\n");
0380             EVENT("strange things happen ... (skip=%ld,eff=%ld)\n",
0381                 size,eff);
0382         }
0383         words = eff;
0384         if (paddr & 15) {
0385             unsigned long init;
0386
0387             init = 4-((paddr & 15) >> 2);
0388             if (init > words) init = words;
0389             dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
0390                 (vcc->vci << MID_DMA_VCI_SHIFT);
0391             dma[j++] = paddr;
0392             paddr += init << 2;
0393             words -= init;
0394         }
0395 #ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */
0396         if (words & ~15) {
0397             dma[j++] = MID_DT_16W | ((words >> 4) <<
0398                 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
0399                 MID_DMA_VCI_SHIFT);
0400             dma[j++] = paddr;
0401             paddr += (words & ~15) << 2;
0402             words &= 15;
0403         }
0404 #endif
0405 #ifdef CONFIG_ATM_ENI_BURST_RX_8W  /* works only with *some* PCI chipsets ... */
0406         if (words & ~7) {
0407             dma[j++] = MID_DT_8W | ((words >> 3) <<
0408                 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
0409                 MID_DMA_VCI_SHIFT);
0410             dma[j++] = paddr;
0411             paddr += (words & ~7) << 2;
0412             words &= 7;
0413         }
0414 #endif
0415 #ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */
0416         if (words & ~3) {
0417             dma[j++] = MID_DT_4W | ((words >> 2) <<
0418                 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
0419                 MID_DMA_VCI_SHIFT);
0420             dma[j++] = paddr;
0421             paddr += (words & ~3) << 2;
0422             words &= 3;
0423         }
0424 #endif
0425 #ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */
0426         if (words & ~1) {
0427             dma[j++] = MID_DT_2W | ((words >> 1) <<
0428                 MID_DMA_COUNT_SHIFT) | (vcc->vci <<
0429                 MID_DMA_VCI_SHIFT);
0430             dma[j++] = paddr;
0431             paddr += (words & ~1) << 2;
0432             words &= 1;
0433         }
0434 #endif
0435         if (words) {
0436             dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT)
0437                 | (vcc->vci << MID_DMA_VCI_SHIFT);
0438             dma[j++] = paddr;
0439         }
0440     }
0441     if (size != eff) {
0442         dma[j++] = (here << MID_DMA_COUNT_SHIFT) |
0443             (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK;
0444         dma[j++] = 0;
0445     }
0446     if (!j || j > 2*RX_DMA_BUF) {
0447         printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n");
0448         goto trouble;
0449     }
0450     dma[j-2] |= MID_DMA_END;
0451     j = j >> 1;
0452     dma_wr = eni_in(MID_DMA_WR_RX);
0453     dma_rd = eni_in(MID_DMA_RD_RX);
0454     /*
0455      * Can I move the dma_wr pointer by 2j+1 positions without overwriting
0456      * data that hasn't been read (position of dma_rd) yet ?
0457      */
0458     if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */
0459         printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n",
0460             vcc->dev->number);
0461         goto trouble;
0462     }
0463         for (i = 0; i < j; i++) {
0464         writel(dma[i*2],eni_dev->rx_dma+dma_wr*8);
0465         writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4);
0466         dma_wr = (dma_wr+1) & (NR_DMA_RX-1);
0467         }
0468     if (skb) {
0469         ENI_PRV_POS(skb) = eni_vcc->descr+size+1;
0470         skb_queue_tail(&eni_dev->rx_queue,skb);
0471         eni_vcc->last = skb;
0472         rx_enqueued++;
0473     }
0474     eni_vcc->descr = here;
0475     eni_out(dma_wr,MID_DMA_WR_RX);
0476     return 0;
0477
0478 trouble:
0479     if (paddr)
0480         dma_unmap_single(&eni_dev->pci_dev->dev,paddr,skb->len,
0481                  DMA_FROM_DEVICE);
0482 dma_map_error:
0483     if (skb) dev_kfree_skb_irq(skb);
0484     return -1;
0485 }
0486
0487
0488 static void discard(struct atm_vcc *vcc,unsigned long size)
0489 {
0490     struct eni_vcc *eni_vcc;
0491
0492     eni_vcc = ENI_VCC(vcc);
0493     EVENT("discard (size=%ld)\n",size,0);
0494     while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0);
0495         /* could do a full fallback, but that might be more expensive */
0496     if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1;
0497     else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1);
0498 }
0499
0500
0501 /*
0502  * TODO: should check whether direct copies (without DMA setup, dequeuing on
0503  * interrupt, etc.) aren't much faster for AAL0
0504  */
0505
0506 static int rx_aal0(struct atm_vcc *vcc)
0507 {
0508     struct eni_vcc *eni_vcc;
0509     unsigned long descr;
0510     unsigned long length;
0511     struct sk_buff *skb;
0512
0513     DPRINTK(">rx_aal0\n");
0514     eni_vcc = ENI_VCC(vcc);
0515     descr = readl(eni_vcc->recv+eni_vcc->descr*4);
0516     if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
0517         rx_ident_err(vcc);
0518         return 1;
0519     }
0520     if (descr & MID_RED_T) {
0521         DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
0522             vcc->dev->number);
0523         length = 0;
0524         atomic_inc(&vcc->stats->rx_err);
0525     }
0526     else {
0527         length = ATM_CELL_SIZE-1; /* no HEC */
0528     }
0529     skb = length ? atm_alloc_charge(vcc,length,GFP_ATOMIC) : NULL;
0530     if (!skb) {
0531         discard(vcc,length >> 2);
0532         return 0;
0533     }
0534     skb_put(skb,length);
0535     skb->tstamp = eni_vcc->timestamp;
0536     DPRINTK("got len %ld\n",length);
0537     if (do_rx_dma(vcc,skb,1,length >> 2,length >> 2)) return 1;
0538     eni_vcc->rxing++;
0539     return 0;
0540 }
0541
0542
0543 static int rx_aal5(struct atm_vcc *vcc)
0544 {
0545     struct eni_vcc *eni_vcc;
0546     unsigned long descr;
0547     unsigned long size,eff,length;
0548     struct sk_buff *skb;
0549
0550     EVENT("rx_aal5\n",0,0);
0551     DPRINTK(">rx_aal5\n");
0552     eni_vcc = ENI_VCC(vcc);
0553     descr = readl(eni_vcc->recv+eni_vcc->descr*4);
0554     if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
0555         rx_ident_err(vcc);
0556         return 1;
0557     }
0558     if (descr & (MID_RED_T | MID_RED_CRC_ERR)) {
0559         if (descr & MID_RED_T) {
0560             EVENT("empty cell (descr=0x%lx)\n",descr,0);
0561             DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
0562                 vcc->dev->number);
0563             size = 0;
0564         }
0565         else {
0566             static unsigned long silence = 0;
0567
0568             if (time_after(jiffies, silence) || silence == 0) {
0569                 printk(KERN_WARNING DEV_LABEL "(itf %d): "
0570                     "discarding PDU(s) with CRC error\n",
0571                     vcc->dev->number);
0572                 silence = (jiffies+2*HZ)|1;
0573             }
0574             size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
0575             EVENT("CRC error (descr=0x%lx,size=%ld)\n",descr,
0576                 size);
0577         }
0578         eff = length = 0;
0579         atomic_inc(&vcc->stats->rx_err);
0580     }
0581     else {
0582         size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
0583         DPRINTK("size=%ld\n",size);
0584         length = readl(eni_vcc->recv+(((eni_vcc->descr+size-1) &
0585             (eni_vcc->words-1)))*4) & 0xffff;
0586                 /* -trailer(2)+header(1) */
0587         if (length && length <= (size << 2)-8 && length <=
0588           ATM_MAX_AAL5_PDU) eff = (length+3) >> 2;
0589         else {               /* ^ trailer length (8) */
0590             EVENT("bad PDU (descr=0x08%lx,length=%ld)\n",descr,
0591                 length);
0592             printk(KERN_ERR DEV_LABEL "(itf %d): bad AAL5 PDU "
0593                 "(VCI=%d,length=%ld,size=%ld (descr 0x%lx))\n",
0594                 vcc->dev->number,vcc->vci,length,size << 2,descr);
0595             length = eff = 0;
0596             atomic_inc(&vcc->stats->rx_err);
0597         }
0598     }
0599     skb = eff ? atm_alloc_charge(vcc,eff << 2,GFP_ATOMIC) : NULL;
0600     if (!skb) {
0601         discard(vcc,size);
0602         return 0;
0603     }
0604     skb_put(skb,length);
0605     DPRINTK("got len %ld\n",length);
0606     if (do_rx_dma(vcc,skb,1,size,eff)) return 1;
0607     eni_vcc->rxing++;
0608     return 0;
0609 }
0610
0611
0612 static inline int rx_vcc(struct atm_vcc *vcc)
0613 {
0614     void __iomem *vci_dsc;
0615     unsigned long tmp;
0616     struct eni_vcc *eni_vcc;
0617
0618     eni_vcc = ENI_VCC(vcc);
0619     vci_dsc = ENI_DEV(vcc->dev)->vci+vcc->vci*16;
0620     EVENT("rx_vcc(1)\n",0,0);
0621     while (eni_vcc->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) >>
0622         MID_VCI_DESCR_SHIFT)) {
0623         EVENT("rx_vcc(2: host dsc=0x%lx, nic dsc=0x%lx)\n",
0624             eni_vcc->descr,tmp);
0625         DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
0626             (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
0627             MID_VCI_DESCR_SHIFT));
0628         if (ENI_VCC(vcc)->rx(vcc)) return 1;
0629     }
0630     /* clear IN_SERVICE flag */
0631     writel(readl(vci_dsc) & ~MID_VCI_IN_SERVICE,vci_dsc);
0632     /*
0633      * If new data has arrived between evaluating the while condition and
0634      * clearing IN_SERVICE, we wouldn't be notified until additional data
0635      * follows. So we have to loop again to be sure.
0636      */
0637     EVENT("rx_vcc(3)\n",0,0);
0638     while (ENI_VCC(vcc)->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR)
0639         >> MID_VCI_DESCR_SHIFT)) {
0640         EVENT("rx_vcc(4: host dsc=0x%lx, nic dsc=0x%lx)\n",
0641             eni_vcc->descr,tmp);
0642         DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
0643             (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
0644             MID_VCI_DESCR_SHIFT));
0645         if (ENI_VCC(vcc)->rx(vcc)) return 1;
0646     }
0647     return 0;
0648 }
0649
0650
0651 static void poll_rx(struct atm_dev *dev)
0652 {
0653     struct eni_dev *eni_dev;
0654     struct atm_vcc *curr;
0655
0656     eni_dev = ENI_DEV(dev);
0657     while ((curr = eni_dev->fast)) {
0658         EVENT("poll_rx.fast\n",0,0);
0659         if (rx_vcc(curr)) return;
0660         eni_dev->fast = ENI_VCC(curr)->next;
0661         ENI_VCC(curr)->next = ENI_VCC_NOS;
0662         barrier();
0663         ENI_VCC(curr)->servicing--;
0664     }
0665     while ((curr = eni_dev->slow)) {
0666         EVENT("poll_rx.slow\n",0,0);
0667         if (rx_vcc(curr)) return;
0668         eni_dev->slow = ENI_VCC(curr)->next;
0669         ENI_VCC(curr)->next = ENI_VCC_NOS;
0670         barrier();
0671         ENI_VCC(curr)->servicing--;
0672     }
0673 }
0674
0675
0676 static void get_service(struct atm_dev *dev)
0677 {
0678     struct eni_dev *eni_dev;
0679     struct atm_vcc *vcc;
0680     unsigned long vci;
0681
0682     DPRINTK(">get_service\n");
0683     eni_dev = ENI_DEV(dev);
0684     while (eni_in(MID_SERV_WRITE) != eni_dev->serv_read) {
0685         vci = readl(eni_dev->service+eni_dev->serv_read*4);
0686         eni_dev->serv_read = (eni_dev->serv_read+1) & (NR_SERVICE-1);
0687         vcc = eni_dev->rx_map[vci & 1023];
0688         if (!vcc) {
0689             printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %ld not "
0690                 "found\n",dev->number,vci);
0691             continue; /* nasty but we try to go on anyway */
0692             /* @@@ nope, doesn't work */
0693         }
0694         EVENT("getting from service\n",0,0);
0695         if (ENI_VCC(vcc)->next != ENI_VCC_NOS) {
0696             EVENT("double service\n",0,0);
0697             DPRINTK("Grr, servicing VCC %ld twice\n",vci);
0698             continue;
0699         }
0700         ENI_VCC(vcc)->timestamp = ktime_get_real();
0701         ENI_VCC(vcc)->next = NULL;
0702         if (vcc->qos.rxtp.traffic_class == ATM_CBR) {
0703             if (eni_dev->fast)
0704                 ENI_VCC(eni_dev->last_fast)->next = vcc;
0705             else eni_dev->fast = vcc;
0706             eni_dev->last_fast = vcc;
0707         }
0708         else {
0709             if (eni_dev->slow)
0710                 ENI_VCC(eni_dev->last_slow)->next = vcc;
0711             else eni_dev->slow = vcc;
0712             eni_dev->last_slow = vcc;
0713         }
0714         putting++;
0715         ENI_VCC(vcc)->servicing++;
0716     }
0717 }
0718
0719
0720 static void dequeue_rx(struct atm_dev *dev)
0721 {
0722     struct eni_dev *eni_dev;
0723     struct eni_vcc *eni_vcc;
0724     struct atm_vcc *vcc;
0725     struct sk_buff *skb;
0726     void __iomem *vci_dsc;
0727     int first;
0728
0729     eni_dev = ENI_DEV(dev);
0730     first = 1;
0731     while (1) {
0732         skb = skb_dequeue(&eni_dev->rx_queue);
0733         if (!skb) {
0734             if (first) {
0735                 DPRINTK(DEV_LABEL "(itf %d): RX but not "
0736                     "rxing\n",dev->number);
0737                 EVENT("nothing to dequeue\n",0,0);
0738             }
0739             break;
0740         }
0741         EVENT("dequeued (size=%ld,pos=0x%lx)\n",ENI_PRV_SIZE(skb),
0742             ENI_PRV_POS(skb));
0743         rx_dequeued++;
0744         vcc = ATM_SKB(skb)->vcc;
0745         eni_vcc = ENI_VCC(vcc);
0746         first = 0;
0747         vci_dsc = eni_dev->vci+vcc->vci*16;
0748         if (!EEPMOK(eni_vcc->rx_pos,ENI_PRV_SIZE(skb),
0749             (readl(vci_dsc+4) & MID_VCI_READ) >> MID_VCI_READ_SHIFT,
0750             eni_vcc->words)) {
0751             EVENT("requeuing\n",0,0);
0752             skb_queue_head(&eni_dev->rx_queue,skb);
0753             break;
0754         }
0755         eni_vcc->rxing--;
0756         eni_vcc->rx_pos = ENI_PRV_POS(skb) & (eni_vcc->words-1);
0757         dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len,
0758                      DMA_TO_DEVICE);
0759         if (!skb->len) dev_kfree_skb_irq(skb);
0760         else {
0761             EVENT("pushing (len=%ld)\n",skb->len,0);
0762             if (vcc->qos.aal == ATM_AAL0)
0763                 *(unsigned long *) skb->data =
0764                     ntohl(*(unsigned long *) skb->data);
0765             memset(skb->cb,0,sizeof(struct eni_skb_prv));
0766             vcc->push(vcc,skb);
0767             pushed++;
0768         }
0769         atomic_inc(&vcc->stats->rx);
0770     }
0771     wake_up(&eni_dev->rx_wait);
0772 }
0773
0774
0775 static int open_rx_first(struct atm_vcc *vcc)
0776 {
0777     struct eni_dev *eni_dev;
0778     struct eni_vcc *eni_vcc;
0779     unsigned long size;
0780
0781     DPRINTK("open_rx_first\n");
0782     eni_dev = ENI_DEV(vcc->dev);
0783     eni_vcc = ENI_VCC(vcc);
0784     eni_vcc->rx = NULL;
0785     if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0;
0786     size = vcc->qos.rxtp.max_sdu*eni_dev->rx_mult/100;
0787     if (size > MID_MAX_BUF_SIZE && vcc->qos.rxtp.max_sdu <=
0788         MID_MAX_BUF_SIZE)
0789         size = MID_MAX_BUF_SIZE;
0790     eni_vcc->recv = eni_alloc_mem(eni_dev,&size);
0791     DPRINTK("rx at 0x%lx\n",eni_vcc->recv);
0792     eni_vcc->words = size >> 2;
0793     if (!eni_vcc->recv) return -ENOBUFS;
0794     eni_vcc->rx = vcc->qos.aal == ATM_AAL5 ? rx_aal5 : rx_aal0;
0795     eni_vcc->descr = 0;
0796     eni_vcc->rx_pos = 0;
0797     eni_vcc->rxing = 0;
0798     eni_vcc->servicing = 0;
0799     eni_vcc->next = ENI_VCC_NOS;
0800     return 0;
0801 }
0802
0803
0804 static int open_rx_second(struct atm_vcc *vcc)
0805 {
0806     void __iomem *here;
0807     struct eni_dev *eni_dev;
0808     struct eni_vcc *eni_vcc;
0809     unsigned long size;
0810     int order;
0811
0812     DPRINTK("open_rx_second\n");
0813     eni_dev = ENI_DEV(vcc->dev);
0814     eni_vcc = ENI_VCC(vcc);
0815     if (!eni_vcc->rx) return 0;
0816     /* set up VCI descriptor */
0817     here = eni_dev->vci+vcc->vci*16;
0818     DPRINTK("loc 0x%x\n",(unsigned) (eni_vcc->recv-eni_dev->ram)/4);
0819     size = eni_vcc->words >> 8;
0820     for (order = -1; size; order++) size >>= 1;
0821     writel(0,here+4); /* descr, read = 0 */
0822     writel(0,here+8); /* write, state, count = 0 */
0823     if (eni_dev->rx_map[vcc->vci])
0824         printk(KERN_CRIT DEV_LABEL "(itf %d): BUG - VCI %d already "
0825             "in use\n",vcc->dev->number,vcc->vci);
0826     eni_dev->rx_map[vcc->vci] = vcc; /* now it counts */
0827     writel(((vcc->qos.aal != ATM_AAL5 ? MID_MODE_RAW : MID_MODE_AAL5) <<
0828         MID_VCI_MODE_SHIFT) | MID_VCI_PTI_MODE |
0829         (((eni_vcc->recv-eni_dev->ram) >> (MID_LOC_SKIP+2)) <<
0830         MID_VCI_LOCATION_SHIFT) | (order << MID_VCI_SIZE_SHIFT),here);
0831     return 0;
0832 }
0833
0834
0835 static void close_rx(struct atm_vcc *vcc)
0836 {
0837     DECLARE_WAITQUEUE(wait,current);
0838     void __iomem *here;
0839     struct eni_dev *eni_dev;
0840     struct eni_vcc *eni_vcc;
0841
0842     eni_vcc = ENI_VCC(vcc);
0843     if (!eni_vcc->rx) return;
0844     eni_dev = ENI_DEV(vcc->dev);
0845     if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) {
0846         here = eni_dev->vci+vcc->vci*16;
0847         /* block receiver */
0848         writel((readl(here) & ~MID_VCI_MODE) | (MID_MODE_TRASH <<
0849             MID_VCI_MODE_SHIFT),here);
0850         /* wait for receiver to become idle */
0851         udelay(27);
0852         /* discard pending cell */
0853         writel(readl(here) & ~MID_VCI_IN_SERVICE,here);
0854         /* don't accept any new ones */
0855         eni_dev->rx_map[vcc->vci] = NULL;
0856         /* wait for RX queue to drain */
0857         DPRINTK("eni_close: waiting for RX ...\n");
0858         EVENT("RX closing\n",0,0);
0859         add_wait_queue(&eni_dev->rx_wait,&wait);
0860         set_current_state(TASK_UNINTERRUPTIBLE);
0861         barrier();
0862         for (;;) {
0863             /* transition service->rx: rxing++, servicing-- */
0864             if (!eni_vcc->servicing) {
0865                 barrier();
0866                 if (!eni_vcc->rxing) break;
0867             }
0868             EVENT("drain PDUs (rx %ld, serv %ld)\n",eni_vcc->rxing,
0869                 eni_vcc->servicing);
0870             printk(KERN_INFO "%d+%d RX left\n",eni_vcc->servicing,
0871                 eni_vcc->rxing);
0872             schedule();
0873             set_current_state(TASK_UNINTERRUPTIBLE);
0874         }
0875         for (;;) {
0876             int at_end;
0877             u32 tmp;
0878
0879             tasklet_disable(&eni_dev->task);
0880             tmp = readl(eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ;
0881             at_end = eni_vcc->rx_pos == tmp >> MID_VCI_READ_SHIFT;
0882             tasklet_enable(&eni_dev->task);
0883             if (at_end) break;
0884             EVENT("drain discard (host 0x%lx, nic 0x%lx)\n",
0885                 eni_vcc->rx_pos,tmp);
0886             printk(KERN_INFO "draining RX: host 0x%lx, nic 0x%x\n",
0887                 eni_vcc->rx_pos,tmp);
0888             schedule();
0889             set_current_state(TASK_UNINTERRUPTIBLE);
0890         }
0891         set_current_state(TASK_RUNNING);
0892         remove_wait_queue(&eni_dev->rx_wait,&wait);
0893     }
0894     eni_free_mem(eni_dev,eni_vcc->recv,eni_vcc->words << 2);
0895     eni_vcc->rx = NULL;
0896 }
0897
0898
0899 static int start_rx(struct atm_dev *dev)
0900 {
0901     struct eni_dev *eni_dev;
0902
0903     eni_dev = ENI_DEV(dev);
0904     eni_dev->rx_map = (struct atm_vcc **) get_zeroed_page(GFP_KERNEL);
0905     if (!eni_dev->rx_map) {
0906         printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
0907             dev->number);
0908         free_page((unsigned long) eni_dev->free_list);
0909         return -ENOMEM;
0910     }
0911     eni_dev->rx_mult = DEFAULT_RX_MULT;
0912     eni_dev->fast = eni_dev->last_fast = NULL;
0913     eni_dev->slow = eni_dev->last_slow = NULL;
0914     init_waitqueue_head(&eni_dev->rx_wait);
0915     skb_queue_head_init(&eni_dev->rx_queue);
0916     eni_dev->serv_read = eni_in(MID_SERV_WRITE);
0917     eni_out(0,MID_DMA_WR_RX);
0918     return 0;
0919 }
0920
0921
0922 /*----------------------------------- TX ------------------------------------*/
0923
0924
0925 enum enq_res { enq_ok,enq_next,enq_jam };
0926
0927
0928 static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr,
0929     u32 size)
0930 {
0931     u32 init,words;
0932
0933     DPRINTK("put_dma: 0x%lx+0x%x\n",(unsigned long) paddr,size);
0934     EVENT("put_dma: 0x%lx+0x%lx\n",(unsigned long) paddr,size);
0935 #if 0 /* don't complain anymore */
0936     if (paddr & 3)
0937         printk(KERN_ERR "put_dma: unaligned addr (0x%lx)\n",paddr);
0938     if (size & 3)
0939         printk(KERN_ERR "put_dma: unaligned size (0x%lx)\n",size);
0940 #endif
0941     if (paddr & 3) {
0942         init = 4-(paddr & 3);
0943         if (init > size || size < 7) init = size;
0944         DPRINTK("put_dma: %lx DMA: %d/%d bytes\n",
0945             (unsigned long) paddr,init,size);
0946         dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) |
0947             (chan << MID_DMA_CHAN_SHIFT);
0948         dma[(*j)++] = paddr;
0949         paddr += init;
0950         size -= init;
0951     }
0952     words = size >> 2;
0953     size &= 3;
0954     if (words && (paddr & 31)) {
0955         init = 8-((paddr & 31) >> 2);
0956         if (init > words) init = words;
0957         DPRINTK("put_dma: %lx DMA: %d/%d words\n",
0958             (unsigned long) paddr,init,words);
0959         dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
0960             (chan << MID_DMA_CHAN_SHIFT);
0961         dma[(*j)++] = paddr;
0962         paddr += init << 2;
0963         words -= init;
0964     }
0965 #ifdef CONFIG_ATM_ENI_BURST_TX_16W /* may work with some PCI chipsets ... */
0966     if (words & ~15) {
0967         DPRINTK("put_dma: %lx DMA: %d*16/%d words\n",
0968             (unsigned long) paddr,words >> 4,words);
0969         dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT)
0970             | (chan << MID_DMA_CHAN_SHIFT);
0971         dma[(*j)++] = paddr;
0972         paddr += (words & ~15) << 2;
0973         words &= 15;
0974     }
0975 #endif
0976 #ifdef CONFIG_ATM_ENI_BURST_TX_8W /* recommended */
0977     if (words & ~7) {
0978         DPRINTK("put_dma: %lx DMA: %d*8/%d words\n",
0979             (unsigned long) paddr,words >> 3,words);
0980         dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT)
0981             | (chan << MID_DMA_CHAN_SHIFT);
0982         dma[(*j)++] = paddr;
0983         paddr += (words & ~7) << 2;
0984         words &= 7;
0985     }
0986 #endif
0987 #ifdef CONFIG_ATM_ENI_BURST_TX_4W /* probably useless if TX_8W or TX_16W */
0988     if (words & ~3) {
0989         DPRINTK("put_dma: %lx DMA: %d*4/%d words\n",
0990             (unsigned long) paddr,words >> 2,words);
0991         dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT)
0992             | (chan << MID_DMA_CHAN_SHIFT);
0993         dma[(*j)++] = paddr;
0994         paddr += (words & ~3) << 2;
0995         words &= 3;
0996     }
0997 #endif
0998 #ifdef CONFIG_ATM_ENI_BURST_TX_2W /* probably useless if TX_4W, TX_8W, ... */
0999     if (words & ~1) {
1000         DPRINTK("put_dma: %lx DMA: %d*2/%d words\n",
1001             (unsigned long) paddr,words >> 1,words);
1002         dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT)
1003             | (chan << MID_DMA_CHAN_SHIFT);
1004         dma[(*j)++] = paddr;
1005         paddr += (words & ~1) << 2;
1006         words &= 1;
1007     }
1008 #endif
1009     if (words) {
1010         DPRINTK("put_dma: %lx DMA: %d words\n",(unsigned long) paddr,
1011             words);
1012         dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) |
1013             (chan << MID_DMA_CHAN_SHIFT);
1014         dma[(*j)++] = paddr;
1015         paddr += words << 2;
1016     }
1017     if (size) {
1018         DPRINTK("put_dma: %lx DMA: %d bytes\n",(unsigned long) paddr,
1019             size);
1020         dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) |
1021             (chan << MID_DMA_CHAN_SHIFT);
1022         dma[(*j)++] = paddr;
1023     }
1024 }
1025
1026
1027 static enum enq_res do_tx(struct sk_buff *skb)
1028 {
1029     struct atm_vcc *vcc;
1030     struct eni_dev *eni_dev;
1031     struct eni_vcc *eni_vcc;
1032     struct eni_tx *tx;
1033     dma_addr_t paddr;
1034     u32 dma_rd,dma_wr;
1035     u32 size; /* in words */
1036     int aal5,dma_size,i,j;
1037     unsigned char skb_data3;
1038
1039     DPRINTK(">do_tx\n");
1040     NULLCHECK(skb);
1041     EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,skb->len);
1042     vcc = ATM_SKB(skb)->vcc;
1043     NULLCHECK(vcc);
1044     eni_dev = ENI_DEV(vcc->dev);
1045     NULLCHECK(eni_dev);
1046     eni_vcc = ENI_VCC(vcc);
1047     tx = eni_vcc->tx;
1048     NULLCHECK(tx);
1049 #if 0 /* Enable this for testing with the "align" program */
1050     {
1051         unsigned int hack = *((char *) skb->data)-'0';
1052
1053         if (hack < 8) {
1054             skb->data += hack;
1055             skb->len -= hack;
1056         }
1057     }
1058 #endif
1059 #if 0 /* should work now */
1060     if ((unsigned long) skb->data & 3)
1061         printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned "
1062             "TX data\n",vcc->dev->number,vcc->vci);
1063 #endif
1064     /*
1065      * Potential future IP speedup: make hard_header big enough to put
1066      * segmentation descriptor directly into PDU. Saves: 4 slave writes,
1067      * 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-)
1068      */
1069
1070     aal5 = vcc->qos.aal == ATM_AAL5;
1071     /* check space in buffer */
1072     if (!aal5)
1073         size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE;
1074             /* cell without HEC plus segmentation header (includes
1075                four-byte cell header) */
1076     else {
1077         size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1;
1078             /* add AAL5 trailer */
1079         size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE;
1080                         /* add segmentation header */
1081     }
1082     /*
1083      * Can I move tx_pos by size bytes without getting closer than TX_GAP
1084      * to the read pointer ? TX_GAP means to leave some space for what
1085      * the manual calls "too close".
1086      */
1087     if (!NEPMOK(tx->tx_pos,size+TX_GAP,
1088         eni_in(MID_TX_RDPTR(tx->index)),tx->words)) {
1089         DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n",
1090             vcc->dev->number,size);
1091         return enq_next;
1092     }
1093     /* check DMA */
1094     dma_wr = eni_in(MID_DMA_WR_TX);
1095     dma_rd = eni_in(MID_DMA_RD_TX);
1096     dma_size = 3; /* JK for descriptor and final fill, plus final size
1097              mis-alignment fix */
1098 DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags);
1099     if (!skb_shinfo(skb)->nr_frags) dma_size += 5;
1100     else dma_size += 5*(skb_shinfo(skb)->nr_frags+1);
1101     if (dma_size > TX_DMA_BUF) {
1102         printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries "
1103             "(got only %d)\n",vcc->dev->number,dma_size,TX_DMA_BUF);
1104     }
1105     DPRINTK("dma_wr is %d, tx_pos is %ld\n",dma_wr,tx->tx_pos);
1106     if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) <
1107          dma_size) {
1108         printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n",
1109             vcc->dev->number);
1110         return enq_jam;
1111     }
1112     skb_data3 = skb->data[3];
1113     paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len,
1114                    DMA_TO_DEVICE);
1115     if (dma_mapping_error(&eni_dev->pci_dev->dev, paddr))
1116         return enq_next;
1117     ENI_PRV_PADDR(skb) = paddr;
1118     /* prepare DMA queue entries */
1119     j = 0;
1120     eni_dev->dma[j++] = (((tx->tx_pos+TX_DESCR_SIZE) & (tx->words-1)) <<
1121          MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1122          MID_DT_JK;
1123     j++;
1124     if (!skb_shinfo(skb)->nr_frags)
1125         if (aal5) put_dma(tx->index,eni_dev->dma,&j,paddr,skb->len);
1126         else put_dma(tx->index,eni_dev->dma,&j,paddr+4,skb->len-4);
1127     else {
1128 DPRINTK("doing direct send\n"); /* @@@ well, this doesn't work anyway */
1129         for (i = -1; i < skb_shinfo(skb)->nr_frags; i++)
1130             if (i == -1)
1131                 put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1132                     skb->data,
1133                     skb_headlen(skb));
1134             else
1135                 put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1136                     skb_frag_page(&skb_shinfo(skb)->frags[i]) +
1137                     skb_frag_off(&skb_shinfo(skb)->frags[i]),
1138                     skb_frag_size(&skb_shinfo(skb)->frags[i]));
1139     }
1140     if (skb->len & 3) {
1141         put_dma(tx->index, eni_dev->dma, &j, eni_dev->zero.dma,
1142             4 - (skb->len & 3));
1143     }
1144     /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */
1145     eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) <<
1146          MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1147          MID_DMA_END | MID_DT_JK;
1148     j++;
1149     DPRINTK("DMA at end: %d\n",j);
1150     /* store frame */
1151     writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) |
1152         (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) |
1153         (tx->resolution << MID_SEG_RATE_SHIFT) |
1154         (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4);
1155 /*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/
1156     writel((vcc->vci << MID_SEG_VCI_SHIFT) |
1157             (aal5 ? 0 : (skb_data3 & 0xf)) |
1158         (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0),
1159         tx->send+((tx->tx_pos+1) & (tx->words-1))*4);
1160     DPRINTK("size: %d, len:%d\n",size,skb->len);
1161     if (aal5)
1162         writel(skb->len,tx->send+
1163                     ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4);
1164     j = j >> 1;
1165     for (i = 0; i < j; i++) {
1166         writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8);
1167         writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4);
1168         dma_wr = (dma_wr+1) & (NR_DMA_TX-1);
1169     }
1170     ENI_PRV_POS(skb) = tx->tx_pos;
1171     ENI_PRV_SIZE(skb) = size;
1172     ENI_VCC(vcc)->txing += size;
1173     tx->tx_pos = (tx->tx_pos+size) & (tx->words-1);
1174     DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos);
1175     eni_out(dma_wr,MID_DMA_WR_TX);
1176     skb_queue_tail(&eni_dev->tx_queue,skb);
1177     queued++;
1178     return enq_ok;
1179 }
1180
1181
1182 static void poll_tx(struct atm_dev *dev)
1183 {
1184     struct eni_tx *tx;
1185     struct sk_buff *skb;
1186     enum enq_res res;
1187     int i;
1188
1189     DPRINTK(">poll_tx\n");
1190     for (i = NR_CHAN-1; i >= 0; i--) {
1191         tx = &ENI_DEV(dev)->tx[i];
1192         if (tx->send)
1193             while ((skb = skb_dequeue(&tx->backlog))) {
1194                 res = do_tx(skb);
1195                 if (res == enq_ok) continue;
1196                 DPRINTK("re-queuing TX PDU\n");
1197                 skb_queue_head(&tx->backlog,skb);
1198                 requeued++;
1199                 if (res == enq_jam) return;
1200                 break;
1201             }
1202     }
1203 }
1204
1205
1206 static void dequeue_tx(struct atm_dev *dev)
1207 {
1208     struct eni_dev *eni_dev;
1209     struct atm_vcc *vcc;
1210     struct sk_buff *skb;
1211     struct eni_tx *tx;
1212
1213     NULLCHECK(dev);
1214     eni_dev = ENI_DEV(dev);
1215     NULLCHECK(eni_dev);
1216     while ((skb = skb_dequeue(&eni_dev->tx_queue))) {
1217         vcc = ATM_SKB(skb)->vcc;
1218         NULLCHECK(vcc);
1219         tx = ENI_VCC(vcc)->tx;
1220         NULLCHECK(ENI_VCC(vcc)->tx);
1221         DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb),
1222             (unsigned) eni_in(MID_TX_DESCRSTART(tx->index)));
1223         if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) ==
1224             eni_in(MID_TX_DESCRSTART(tx->index))) {
1225             skb_queue_head(&eni_dev->tx_queue,skb);
1226             break;
1227         }
1228         ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb);
1229         dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len,
1230                  DMA_TO_DEVICE);
1231         if (vcc->pop) vcc->pop(vcc,skb);
1232         else dev_kfree_skb_irq(skb);
1233         atomic_inc(&vcc->stats->tx);
1234         wake_up(&eni_dev->tx_wait);
1235         dma_complete++;
1236     }
1237 }
1238
1239
1240 static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr)
1241 {
1242     int i;
1243
1244     for (i = !ubr; i < NR_CHAN; i++)
1245         if (!eni_dev->tx[i].send) return eni_dev->tx+i;
1246     return NULL;
1247 }
1248
1249
1250 static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre,
1251     int *res,int unlimited)
1252 {
1253     static const int pre_div[] = { 4,16,128,2048 };
1254         /* 2^(((x+2)^2-(x+2))/2+1) */
1255
1256     if (unlimited) *pre = *res = 0;
1257     else {
1258         if (*pcr > 0) {
1259             int div;
1260
1261             for (*pre = 0; *pre < 3; (*pre)++)
1262                 if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break;
1263             div = pre_div[*pre]**pcr;
1264             DPRINTK("min div %d\n",div);
1265             *res = TS_CLOCK/div-1;
1266         }
1267         else {
1268             int div;
1269
1270             if (!*pcr) *pcr = eni_dev->tx_bw+reserved;
1271             for (*pre = 3; *pre >= 0; (*pre)--)
1272                 if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break;
1273             if (*pre < 3) (*pre)++; /* else fail later */
1274             div = pre_div[*pre]*-*pcr;
1275             DPRINTK("max div %d\n",div);
1276             *res = DIV_ROUND_UP(TS_CLOCK, div)-1;
1277         }
1278         if (*res < 0) *res = 0;
1279         if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE;
1280     }
1281     *pcr = TS_CLOCK/pre_div[*pre]/(*res+1);
1282     DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res);
1283     return 0;
1284 }
1285
1286
1287 static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp,
1288     int set_rsv,int set_shp)
1289 {
1290     struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1291     struct eni_vcc *eni_vcc = ENI_VCC(vcc);
1292     struct eni_tx *tx;
1293     unsigned long size;
1294     void __iomem *mem;
1295     int rate,ubr,unlimited,new_tx;
1296     int pre,res,order;
1297     int error;
1298
1299     rate = atm_pcr_goal(txtp);
1300     ubr = txtp->traffic_class == ATM_UBR;
1301     unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR ||
1302         rate >= ATM_OC3_PCR);
1303     if (!unlimited) {
1304         size = txtp->max_sdu*eni_dev->tx_mult/100;
1305         if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <=
1306             MID_MAX_BUF_SIZE)
1307             size = MID_MAX_BUF_SIZE;
1308     }
1309     else {
1310         if (eni_dev->ubr) {
1311             eni_vcc->tx = eni_dev->ubr;
1312             txtp->pcr = ATM_OC3_PCR;
1313             return 0;
1314         }
1315         size = UBR_BUFFER;
1316     }
1317     new_tx = !eni_vcc->tx;
1318     mem = NULL; /* for gcc */
1319     if (!new_tx) tx = eni_vcc->tx;
1320     else {
1321         mem = eni_alloc_mem(eni_dev,&size);
1322         if (!mem) return -ENOBUFS;
1323         tx = alloc_tx(eni_dev,unlimited);
1324         if (!tx) {
1325             eni_free_mem(eni_dev,mem,size);
1326             return -EBUSY;
1327         }
1328         DPRINTK("got chan %d\n",tx->index);
1329         tx->reserved = tx->shaping = 0;
1330         tx->send = mem;
1331         tx->words = size >> 2;
1332         skb_queue_head_init(&tx->backlog);
1333         for (order = 0; size > (1 << (order+10)); order++);
1334         eni_out((order << MID_SIZE_SHIFT) |
1335             ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)),
1336             MID_TX_PLACE(tx->index));
1337         tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) &
1338             MID_DESCR_START;
1339     }
1340     error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited);
1341     if (!error  && txtp->min_pcr > rate) error = -EINVAL;
1342     if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR &&
1343         txtp->max_pcr < rate) error = -EINVAL;
1344     if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved)
1345         error = -EINVAL;
1346     if (!error && set_rsv && !set_shp && rate < tx->shaping)
1347         error = -EINVAL;
1348     if (!error && !set_rsv && rate > tx->reserved && !ubr)
1349         error = -EINVAL;
1350     if (error) {
1351         if (new_tx) {
1352             tx->send = NULL;
1353             eni_free_mem(eni_dev,mem,size);
1354         }
1355         return error;
1356     }
1357     txtp->pcr = rate;
1358     if (set_rsv && !ubr) {
1359         eni_dev->tx_bw += tx->reserved;
1360         tx->reserved = rate;
1361         eni_dev->tx_bw -= rate;
1362     }
1363     if (set_shp || (unlimited && new_tx)) {
1364         if (unlimited && new_tx) eni_dev->ubr = tx;
1365         tx->prescaler = pre;
1366         tx->resolution = res;
1367         tx->shaping = rate;
1368     }
1369     if (set_shp) eni_vcc->tx = tx;
1370     DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping);
1371     return 0;
1372 }
1373
1374
1375 static int open_tx_first(struct atm_vcc *vcc)
1376 {
1377     ENI_VCC(vcc)->tx = NULL;
1378     if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0;
1379     ENI_VCC(vcc)->txing = 0;
1380     return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1);
1381 }
1382
1383
1384 static int open_tx_second(struct atm_vcc *vcc)
1385 {
1386     return 0; /* nothing to do */
1387 }
1388
1389
1390 static void close_tx(struct atm_vcc *vcc)
1391 {
1392     DECLARE_WAITQUEUE(wait,current);
1393     struct eni_dev *eni_dev;
1394     struct eni_vcc *eni_vcc;
1395
1396     eni_vcc = ENI_VCC(vcc);
1397     if (!eni_vcc->tx) return;
1398     eni_dev = ENI_DEV(vcc->dev);
1399     /* wait for TX queue to drain */
1400     DPRINTK("eni_close: waiting for TX ...\n");
1401     add_wait_queue(&eni_dev->tx_wait,&wait);
1402     set_current_state(TASK_UNINTERRUPTIBLE);
1403     for (;;) {
1404         int txing;
1405
1406         tasklet_disable(&eni_dev->task);
1407         txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing;
1408         tasklet_enable(&eni_dev->task);
1409         if (!txing) break;
1410         DPRINTK("%d TX left\n",eni_vcc->txing);
1411         schedule();
1412         set_current_state(TASK_UNINTERRUPTIBLE);
1413     }
1414     set_current_state(TASK_RUNNING);
1415     remove_wait_queue(&eni_dev->tx_wait,&wait);
1416     if (eni_vcc->tx != eni_dev->ubr) {
1417         /*
1418          * Looping a few times in here is probably far cheaper than
1419          * keeping track of TX completions all the time, so let's poll
1420          * a bit ...
1421          */
1422         while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) !=
1423             eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index)))
1424             schedule();
1425         eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2);
1426         eni_vcc->tx->send = NULL;
1427         eni_dev->tx_bw += eni_vcc->tx->reserved;
1428     }
1429     eni_vcc->tx = NULL;
1430 }
1431
1432
1433 static int start_tx(struct atm_dev *dev)
1434 {
1435     struct eni_dev *eni_dev;
1436     int i;
1437
1438     eni_dev = ENI_DEV(dev);
1439     eni_dev->lost = 0;
1440     eni_dev->tx_bw = ATM_OC3_PCR;
1441     eni_dev->tx_mult = DEFAULT_TX_MULT;
1442     init_waitqueue_head(&eni_dev->tx_wait);
1443     eni_dev->ubr = NULL;
1444     skb_queue_head_init(&eni_dev->tx_queue);
1445     eni_out(0,MID_DMA_WR_TX);
1446     for (i = 0; i < NR_CHAN; i++) {
1447         eni_dev->tx[i].send = NULL;
1448         eni_dev->tx[i].index = i;
1449     }
1450     return 0;
1451 }
1452
1453
1454 /*--------------------------------- common ----------------------------------*/
1455
1456
1457 #if 0 /* may become useful again when tuning things */
1458
1459 static void foo(void)
1460 {
1461 printk(KERN_INFO
1462   "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n"
1463   "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n",
1464   tx_complete,dma_complete,queued,requeued,submitted,backlogged,
1465   rx_enqueued,rx_dequeued,putting,pushed);
1466 if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost);
1467 }
1468
1469 #endif
1470
1471
1472 static void bug_int(struct atm_dev *dev,unsigned long reason)
1473 {
1474     DPRINTK(">bug_int\n");
1475     if (reason & MID_DMA_ERR_ACK)
1476         printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1477             "error\n",dev->number);
1478     if (reason & MID_TX_IDENT_MISM)
1479         printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident "
1480             "mismatch\n",dev->number);
1481     if (reason & MID_TX_DMA_OVFL)
1482         printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1483             "overflow\n",dev->number);
1484     EVENT("---dump ends here---\n",0,0);
1485     printk(KERN_NOTICE "---recent events---\n");
1486     event_dump();
1487 }
1488
1489
1490 static irqreturn_t eni_int(int irq,void *dev_id)
1491 {
1492     struct atm_dev *dev;
1493     struct eni_dev *eni_dev;
1494     u32 reason;
1495
1496     DPRINTK(">eni_int\n");
1497     dev = dev_id;
1498     eni_dev = ENI_DEV(dev);
1499     reason = eni_in(MID_ISA);
1500     DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason);
1501     /*
1502      * Must handle these two right now, because reading ISA doesn't clear
1503      * them, so they re-occur and we never make it to the tasklet. Since
1504      * they're rare, we don't mind the occasional invocation of eni_tasklet
1505      * with eni_dev->events == 0.
1506      */
1507     if (reason & MID_STAT_OVFL) {
1508         EVENT("stat overflow\n",0,0);
1509         eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH;
1510     }
1511     if (reason & MID_SUNI_INT) {
1512         EVENT("SUNI int\n",0,0);
1513         dev->phy->interrupt(dev);
1514 #if 0
1515         foo();
1516 #endif
1517     }
1518     spin_lock(&eni_dev->lock);
1519     eni_dev->events |= reason;
1520     spin_unlock(&eni_dev->lock);
1521     tasklet_schedule(&eni_dev->task);
1522     return IRQ_HANDLED;
1523 }
1524
1525
1526 static void eni_tasklet(unsigned long data)
1527 {
1528     struct atm_dev *dev = (struct atm_dev *) data;
1529     struct eni_dev *eni_dev = ENI_DEV(dev);
1530     unsigned long flags;
1531     u32 events;
1532
1533     DPRINTK("eni_tasklet (dev %p)\n",dev);
1534     spin_lock_irqsave(&eni_dev->lock,flags);
1535     events = xchg(&eni_dev->events,0);
1536     spin_unlock_irqrestore(&eni_dev->lock,flags);
1537     if (events & MID_RX_DMA_COMPLETE) {
1538         EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0);
1539         dequeue_rx(dev);
1540         EVENT("dequeue_rx done, starting poll_rx\n",0,0);
1541         poll_rx(dev);
1542         EVENT("poll_rx done\n",0,0);
1543         /* poll_tx ? */
1544     }
1545     if (events & MID_SERVICE) {
1546         EVENT("INT: service, starting get_service\n",0,0);
1547         get_service(dev);
1548         EVENT("get_service done, starting poll_rx\n",0,0);
1549         poll_rx(dev);
1550         EVENT("poll_rx done\n",0,0);
1551     }
1552     if (events & MID_TX_DMA_COMPLETE) {
1553         EVENT("INT: TX DMA COMPLETE\n",0,0);
1554         dequeue_tx(dev);
1555     }
1556     if (events & MID_TX_COMPLETE) {
1557         EVENT("INT: TX COMPLETE\n",0,0);
1558         tx_complete++;
1559         wake_up(&eni_dev->tx_wait);
1560         /* poll_rx ? */
1561     }
1562     if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) {
1563         EVENT("bug interrupt\n",0,0);
1564         bug_int(dev,events);
1565     }
1566     poll_tx(dev);
1567 }
1568
1569
1570 /*--------------------------------- entries ---------------------------------*/
1571
1572
1573 static char * const media_name[] = {
1574     "MMF", "SMF", "MMF", "03?", /*  0- 3 */
1575     "UTP", "05?", "06?", "07?", /*  4- 7 */
1576     "TAXI","09?", "10?", "11?", /*  8-11 */
1577     "12?", "13?", "14?", "15?", /* 12-15 */
1578     "MMF", "SMF", "18?", "19?", /* 16-19 */
1579     "UTP", "21?", "22?", "23?", /* 20-23 */
1580     "24?", "25?", "26?", "27?", /* 24-27 */
1581     "28?", "29?", "30?", "31?"  /* 28-31 */
1582 };
1583
1584
1585 #define SET_SEPROM \
1586   ({ if (!error && !pci_error) { \
1587     pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \
1588     udelay(10); /* 10 usecs */ \
1589   } })
1590 #define GET_SEPROM \
1591   ({ if (!error && !pci_error) { \
1592     pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \
1593     udelay(10); /* 10 usecs */ \
1594   } })
1595
1596
1597 static int get_esi_asic(struct atm_dev *dev)
1598 {
1599     struct eni_dev *eni_dev;
1600     unsigned char tonga;
1601     int error,failed,pci_error;
1602     int address,i,j;
1603
1604     eni_dev = ENI_DEV(dev);
1605     error = pci_error = 0;
1606     tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK;
1607     SET_SEPROM;
1608     for (i = 0; i < ESI_LEN && !error && !pci_error; i++) {
1609         /* start operation */
1610         tonga |= SEPROM_DATA;
1611         SET_SEPROM;
1612         tonga |= SEPROM_CLK;
1613         SET_SEPROM;
1614         tonga &= ~SEPROM_DATA;
1615         SET_SEPROM;
1616         tonga &= ~SEPROM_CLK;
1617         SET_SEPROM;
1618         /* send address */
1619         address = ((i+SEPROM_ESI_BASE) << 1)+1;
1620         for (j = 7; j >= 0; j--) {
1621             tonga = (address >> j) & 1 ? tonga | SEPROM_DATA :
1622                 tonga & ~SEPROM_DATA;
1623             SET_SEPROM;
1624             tonga |= SEPROM_CLK;
1625             SET_SEPROM;
1626             tonga &= ~SEPROM_CLK;
1627             SET_SEPROM;
1628         }
1629         /* get ack */
1630         tonga |= SEPROM_DATA;
1631         SET_SEPROM;
1632         tonga |= SEPROM_CLK;
1633         SET_SEPROM;
1634         GET_SEPROM;
1635         failed = tonga & SEPROM_DATA;
1636         tonga &= ~SEPROM_CLK;
1637         SET_SEPROM;
1638         tonga |= SEPROM_DATA;
1639         SET_SEPROM;
1640         if (failed) error = -EIO;
1641         else {
1642             dev->esi[i] = 0;
1643             for (j = 7; j >= 0; j--) {
1644                 dev->esi[i] <<= 1;
1645                 tonga |= SEPROM_DATA;
1646                 SET_SEPROM;
1647                 tonga |= SEPROM_CLK;
1648                 SET_SEPROM;
1649                 GET_SEPROM;
1650                 if (tonga & SEPROM_DATA) dev->esi[i] |= 1;
1651                 tonga &= ~SEPROM_CLK;
1652                 SET_SEPROM;
1653                 tonga |= SEPROM_DATA;
1654                 SET_SEPROM;
1655             }
1656             /* get ack */
1657             tonga |= SEPROM_DATA;
1658             SET_SEPROM;
1659             tonga |= SEPROM_CLK;
1660             SET_SEPROM;
1661             GET_SEPROM;
1662             if (!(tonga & SEPROM_DATA)) error = -EIO;
1663             tonga &= ~SEPROM_CLK;
1664             SET_SEPROM;
1665             tonga |= SEPROM_DATA;
1666             SET_SEPROM;
1667         }
1668         /* stop operation */
1669         tonga &= ~SEPROM_DATA;
1670         SET_SEPROM;
1671         tonga |= SEPROM_CLK;
1672         SET_SEPROM;
1673         tonga |= SEPROM_DATA;
1674         SET_SEPROM;
1675     }
1676     if (pci_error) {
1677         printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI "
1678             "(0x%02x)\n",dev->number,pci_error);
1679         error = -EIO;
1680     }
1681     return error;
1682 }
1683
1684
1685 #undef SET_SEPROM
1686 #undef GET_SEPROM
1687
1688
1689 static int get_esi_fpga(struct atm_dev *dev, void __iomem *base)
1690 {
1691     void __iomem *mac_base;
1692     int i;
1693
1694     mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom);
1695     for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3));
1696     return 0;
1697 }
1698
1699
1700 static int eni_do_init(struct atm_dev *dev)
1701 {
1702     struct midway_eprom __iomem *eprom;
1703     struct eni_dev *eni_dev;
1704     struct pci_dev *pci_dev;
1705     unsigned long real_base;
1706     void __iomem *base;
1707     int error,i,last;
1708
1709     DPRINTK(">eni_init\n");
1710     dev->ci_range.vpi_bits = 0;
1711     dev->ci_range.vci_bits = NR_VCI_LD;
1712     dev->link_rate = ATM_OC3_PCR;
1713     eni_dev = ENI_DEV(dev);
1714     pci_dev = eni_dev->pci_dev;
1715     real_base = pci_resource_start(pci_dev, 0);
1716     eni_dev->irq = pci_dev->irq;
1717     if ((error = pci_write_config_word(pci_dev,PCI_COMMAND,
1718         PCI_COMMAND_MEMORY |
1719         (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1720         printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory "
1721             "(0x%02x)\n",dev->number,error);
1722         return -EIO;
1723     }
1724     printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,",
1725         dev->number,pci_dev->revision,real_base,eni_dev->irq);
1726     if (!(base = ioremap(real_base,MAP_MAX_SIZE))) {
1727         printk("\n");
1728         printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page "
1729             "mapping\n",dev->number);
1730         return -ENOMEM;
1731     }
1732     eni_dev->ioaddr = base;
1733     eni_dev->base_diff = real_base - (unsigned long) base;
1734     /* id may not be present in ASIC Tonga boards - check this @@@ */
1735     if (!eni_dev->asic) {
1736         eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom));
1737         if (readl(&eprom->magic) != ENI155_MAGIC) {
1738             printk("\n");
1739             printk(KERN_ERR DEV_LABEL
1740                    "(itf %d): bad magic - expected 0x%x, got 0x%x\n",
1741                    dev->number, ENI155_MAGIC,
1742                    (unsigned)readl(&eprom->magic));
1743             error = -EINVAL;
1744             goto unmap;
1745         }
1746     }
1747     eni_dev->phy = base+PHY_BASE;
1748     eni_dev->reg = base+REG_BASE;
1749     eni_dev->ram = base+RAM_BASE;
1750     last = MAP_MAX_SIZE-RAM_BASE;
1751     for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) {
1752         writel(0x55555555,eni_dev->ram+i);
1753         if (readl(eni_dev->ram+i) != 0x55555555) last = i;
1754         else {
1755             writel(0xAAAAAAAA,eni_dev->ram+i);
1756             if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i;
1757             else writel(i,eni_dev->ram+i);
1758         }
1759     }
1760     for (i = 0; i < last; i += RAM_INCREMENT)
1761         if (readl(eni_dev->ram+i) != i) break;
1762     eni_dev->mem = i;
1763     memset_io(eni_dev->ram,0,eni_dev->mem);
1764     /* TODO: should shrink allocation now */
1765     printk("mem=%dkB (",eni_dev->mem >> 10);
1766     /* TODO: check for non-SUNI, check for TAXI ? */
1767     if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) {
1768         printk(")\n");
1769         printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n",
1770             dev->number,(unsigned) eni_in(MID_RES_ID_MCON));
1771         error = -EINVAL;
1772         goto unmap;
1773     }
1774     error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base);
1775     if (error)
1776         goto unmap;
1777     for (i = 0; i < ESI_LEN; i++)
1778         printk("%s%02X",i ? "-" : "",dev->esi[i]);
1779     printk(")\n");
1780     printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number,
1781         eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA",
1782         media_name[eni_in(MID_RES_ID_MCON) & DAUGHTER_ID]);
1783
1784     error = suni_init(dev);
1785     if (error)
1786         goto unmap;
1787 out:
1788     return error;
1789 unmap:
1790     iounmap(base);
1791     goto out;
1792 }
1793
1794 static void eni_do_release(struct atm_dev *dev)
1795 {
1796     struct eni_dev *ed = ENI_DEV(dev);
1797
1798     dev->phy->stop(dev);
1799     dev->phy = NULL;
1800     iounmap(ed->ioaddr);
1801 }
1802
1803 static int eni_start(struct atm_dev *dev)
1804 {
1805     struct eni_dev *eni_dev;
1806
1807     void __iomem *buf;
1808     unsigned long buffer_mem;
1809     int error;
1810
1811     DPRINTK(">eni_start\n");
1812     eni_dev = ENI_DEV(dev);
1813     if (request_irq(eni_dev->irq,&eni_int,IRQF_SHARED,DEV_LABEL,dev)) {
1814         printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n",
1815             dev->number,eni_dev->irq);
1816         error = -EAGAIN;
1817         goto out;
1818     }
1819     pci_set_master(eni_dev->pci_dev);
1820     if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND,
1821         PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
1822         (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1823         printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+"
1824             "master (0x%02x)\n",dev->number,error);
1825         goto free_irq;
1826     }
1827     if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,
1828         END_SWAP_DMA))) {
1829         printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap "
1830             "(0x%02x)\n",dev->number,error);
1831         goto free_irq;
1832     }
1833     /* determine addresses of internal tables */
1834     eni_dev->vci = eni_dev->ram;
1835     eni_dev->rx_dma = eni_dev->ram+NR_VCI*16;
1836     eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8;
1837     eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8;
1838     buf = eni_dev->service+NR_SERVICE*4;
1839     DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n",
1840          eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma,
1841          eni_dev->service,buf);
1842     spin_lock_init(&eni_dev->lock);
1843     tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev);
1844     eni_dev->events = 0;
1845     /* initialize memory management */
1846     buffer_mem = eni_dev->mem - (buf - eni_dev->ram);
1847     eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2;
1848     eni_dev->free_list = kmalloc_array(eni_dev->free_list_size + 1,
1849                        sizeof(*eni_dev->free_list),
1850                        GFP_KERNEL);
1851     if (!eni_dev->free_list) {
1852         printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
1853             dev->number);
1854         error = -ENOMEM;
1855         goto free_irq;
1856     }
1857     eni_dev->free_len = 0;
1858     eni_put_free(eni_dev,buf,buffer_mem);
1859     memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */
1860     /*
1861      * byte_addr  free (k)
1862      * 0x00000000     512  VCI table
1863      * 0x00004000     496  RX DMA
1864      * 0x00005000     492  TX DMA
1865      * 0x00006000     488  service list
1866      * 0x00007000     484  buffers
1867      * 0x00080000       0  end (512kB)
1868      */
1869     eni_out(0xffffffff,MID_IE);
1870     error = start_tx(dev);
1871     if (error) goto free_list;
1872     error = start_rx(dev);
1873     if (error) goto free_list;
1874     error = dev->phy->start(dev);
1875     if (error) goto free_list;
1876     eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) |
1877         MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE,
1878         MID_MC_S);
1879         /* Tonga uses SBus INTReq1 */
1880     (void) eni_in(MID_ISA); /* clear Midway interrupts */
1881     return 0;
1882
1883 free_list:
1884     kfree(eni_dev->free_list);
1885
1886 free_irq:
1887     free_irq(eni_dev->irq, dev);
1888
1889 out:
1890     return error;
1891 }
1892
1893
1894 static void eni_close(struct atm_vcc *vcc)
1895 {
1896     DPRINTK(">eni_close\n");
1897     if (!ENI_VCC(vcc)) return;
1898     clear_bit(ATM_VF_READY,&vcc->flags);
1899     close_rx(vcc);
1900     close_tx(vcc);
1901     DPRINTK("eni_close: done waiting\n");
1902     /* deallocate memory */
1903     kfree(ENI_VCC(vcc));
1904     vcc->dev_data = NULL;
1905     clear_bit(ATM_VF_ADDR,&vcc->flags);
1906     /*foo();*/
1907 }
1908
1909
1910 static int eni_open(struct atm_vcc *vcc)
1911 {
1912     struct eni_vcc *eni_vcc;
1913     int error;
1914     short vpi = vcc->vpi;
1915     int vci = vcc->vci;
1916
1917     DPRINTK(">eni_open\n");
1918     EVENT("eni_open\n",0,0);
1919     if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
1920         vcc->dev_data = NULL;
1921     if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
1922         set_bit(ATM_VF_ADDR,&vcc->flags);
1923     if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5)
1924         return -EINVAL;
1925     DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi,
1926         vcc->vci);
1927     if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) {
1928         eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL);
1929         if (!eni_vcc) return -ENOMEM;
1930         vcc->dev_data = eni_vcc;
1931         eni_vcc->tx = NULL; /* for eni_close after open_rx */
1932         if ((error = open_rx_first(vcc))) {
1933             eni_close(vcc);
1934             return error;
1935         }
1936         if ((error = open_tx_first(vcc))) {
1937             eni_close(vcc);
1938             return error;
1939         }
1940     }
1941     if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0;
1942     if ((error = open_rx_second(vcc))) {
1943         eni_close(vcc);
1944         return error;
1945     }
1946     if ((error = open_tx_second(vcc))) {
1947         eni_close(vcc);
1948         return error;
1949     }
1950     set_bit(ATM_VF_READY,&vcc->flags);
1951     /* should power down SUNI while !ref_count @@@ */
1952     return 0;
1953 }
1954
1955
1956 static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs)
1957 {
1958     struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1959     struct eni_tx *tx = ENI_VCC(vcc)->tx;
1960     struct sk_buff *skb;
1961     int error,rate,rsv,shp;
1962
1963     if (qos->txtp.traffic_class == ATM_NONE) return 0;
1964     if (tx == eni_dev->ubr) return -EBADFD;
1965     rate = atm_pcr_goal(&qos->txtp);
1966     if (rate < 0) rate = -rate;
1967     rsv = shp = 0;
1968     if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1;
1969     if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1;
1970     if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1;
1971     if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1;
1972     if (!rsv && !shp) return 0;
1973     error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp);
1974     if (error) return error;
1975     if (shp && !(flgs & ATM_MF_IMMED)) return 0;
1976     /*
1977      * Walk through the send buffer and patch the rate information in all
1978      * segmentation buffer descriptors of this VCC.
1979      */
1980     tasklet_disable(&eni_dev->task);
1981     skb_queue_walk(&eni_dev->tx_queue, skb) {
1982         void __iomem *dsc;
1983
1984         if (ATM_SKB(skb)->vcc != vcc) continue;
1985         dsc = tx->send+ENI_PRV_POS(skb)*4;
1986         writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) |
1987             (tx->prescaler << MID_SEG_PR_SHIFT) |
1988             (tx->resolution << MID_SEG_RATE_SHIFT), dsc);
1989     }
1990     tasklet_enable(&eni_dev->task);
1991     return 0;
1992 }
1993
1994
1995 static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
1996 {
1997     struct eni_dev *eni_dev = ENI_DEV(dev);
1998
1999     if (cmd == ENI_MEMDUMP) {
2000         if (!capable(CAP_NET_ADMIN)) return -EPERM;
2001         printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d "
2002             "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number);
2003         dump(dev);
2004         return 0;
2005     }
2006     if (cmd == ENI_SETMULT) {
2007         struct eni_multipliers mult;
2008
2009         if (!capable(CAP_NET_ADMIN)) return -EPERM;
2010         if (copy_from_user(&mult, arg,
2011             sizeof(struct eni_multipliers)))
2012             return -EFAULT;
2013         if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) ||
2014             mult.tx > 65536 || mult.rx > 65536)
2015             return -EINVAL;
2016         if (mult.tx) eni_dev->tx_mult = mult.tx;
2017         if (mult.rx) eni_dev->rx_mult = mult.rx;
2018         return 0;
2019     }
2020     if (cmd == ATM_SETCIRANGE) {
2021         struct atm_cirange ci;
2022
2023         if (copy_from_user(&ci, arg,sizeof(struct atm_cirange)))
2024             return -EFAULT;
2025         if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) &&
2026             (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX))
2027             return 0;
2028         return -EINVAL;
2029     }
2030     if (!dev->phy->ioctl) return -ENOIOCTLCMD;
2031     return dev->phy->ioctl(dev,cmd,arg);
2032 }
2033
2034 static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb)
2035 {
2036     enum enq_res res;
2037
2038     DPRINTK(">eni_send\n");
2039     if (!ENI_VCC(vcc)->tx) {
2040         if (vcc->pop) vcc->pop(vcc,skb);
2041         else dev_kfree_skb(skb);
2042         return -EINVAL;
2043     }
2044     if (!skb) {
2045         printk(KERN_CRIT "!skb in eni_send ?\n");
2046         if (vcc->pop) vcc->pop(vcc,skb);
2047         return -EINVAL;
2048     }
2049     if (vcc->qos.aal == ATM_AAL0) {
2050         if (skb->len != ATM_CELL_SIZE-1) {
2051             if (vcc->pop) vcc->pop(vcc,skb);
2052             else dev_kfree_skb(skb);
2053             return -EINVAL;
2054         }
2055         *(u32 *) skb->data = htonl(*(u32 *) skb->data);
2056     }
2057     submitted++;
2058     ATM_SKB(skb)->vcc = vcc;
2059     tasklet_disable_in_atomic(&ENI_DEV(vcc->dev)->task);
2060     res = do_tx(skb);
2061     tasklet_enable(&ENI_DEV(vcc->dev)->task);
2062     if (res == enq_ok) return 0;
2063     skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb);
2064     backlogged++;
2065     tasklet_schedule(&ENI_DEV(vcc->dev)->task);
2066     return 0;
2067 }
2068
2069 static void eni_phy_put(struct atm_dev *dev,unsigned char value,
2070     unsigned long addr)
2071 {
2072     writel(value,ENI_DEV(dev)->phy+addr*4);
2073 }
2074
2075
2076
2077 static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr)
2078 {
2079     return readl(ENI_DEV(dev)->phy+addr*4);
2080 }
2081
2082
2083 static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page)
2084 {
2085     struct sock *s;
2086     static const char *signal[] = { "LOST","unknown","okay" };
2087     struct eni_dev *eni_dev = ENI_DEV(dev);
2088     struct atm_vcc *vcc;
2089     int left,i;
2090
2091     left = *pos;
2092     if (!left)
2093         return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, "
2094             "%d cps remaining\n",dev->number,signal[(int) dev->signal],
2095             eni_dev->mem >> 10,eni_dev->tx_bw);
2096     if (!--left)
2097         return sprintf(page,"%4sBursts: TX"
2098 #if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \
2099     !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \
2100     !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \
2101     !defined(CONFIG_ATM_ENI_BURST_TX_2W)
2102             " none"
2103 #endif
2104 #ifdef CONFIG_ATM_ENI_BURST_TX_16W
2105             " 16W"
2106 #endif
2107 #ifdef CONFIG_ATM_ENI_BURST_TX_8W
2108             " 8W"
2109 #endif
2110 #ifdef CONFIG_ATM_ENI_BURST_TX_4W
2111             " 4W"
2112 #endif
2113 #ifdef CONFIG_ATM_ENI_BURST_TX_2W
2114             " 2W"
2115 #endif
2116             ", RX"
2117 #if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \
2118     !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \
2119     !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \
2120     !defined(CONFIG_ATM_ENI_BURST_RX_2W)
2121             " none"
2122 #endif
2123 #ifdef CONFIG_ATM_ENI_BURST_RX_16W
2124             " 16W"
2125 #endif
2126 #ifdef CONFIG_ATM_ENI_BURST_RX_8W
2127             " 8W"
2128 #endif
2129 #ifdef CONFIG_ATM_ENI_BURST_RX_4W
2130             " 4W"
2131 #endif
2132 #ifdef CONFIG_ATM_ENI_BURST_RX_2W
2133             " 2W"
2134 #endif
2135 #ifndef CONFIG_ATM_ENI_TUNE_BURST
2136             " (default)"
2137 #endif
2138             "\n","");
2139     if (!--left)
2140         return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n",
2141             "",eni_dev->tx_mult,eni_dev->rx_mult);
2142     for (i = 0; i < NR_CHAN; i++) {
2143         struct eni_tx *tx = eni_dev->tx+i;
2144
2145         if (!tx->send) continue;
2146         if (!--left) {
2147             return sprintf(page, "tx[%d]:    0x%lx-0x%lx "
2148                 "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i,
2149                 (unsigned long) (tx->send - eni_dev->ram),
2150                 tx->send-eni_dev->ram+tx->words*4-1,tx->words*4,
2151                 tx->reserved,tx->shaping,
2152                 tx == eni_dev->ubr ? " (UBR)" : "");
2153         }
2154         if (--left) continue;
2155         return sprintf(page,"%10sbacklog %u packets\n","",
2156             skb_queue_len(&tx->backlog));
2157     }
2158     read_lock(&vcc_sklist_lock);
2159     for(i = 0; i < VCC_HTABLE_SIZE; ++i) {
2160         struct hlist_head *head = &vcc_hash[i];
2161
2162         sk_for_each(s, head) {
2163             struct eni_vcc *eni_vcc;
2164             int length;
2165
2166             vcc = atm_sk(s);
2167             if (vcc->dev != dev)
2168                 continue;
2169             eni_vcc = ENI_VCC(vcc);
2170             if (--left) continue;
2171             length = sprintf(page,"vcc %4d: ",vcc->vci);
2172             if (eni_vcc->rx) {
2173                 length += sprintf(page+length, "0x%lx-0x%lx "
2174                     "(%6ld bytes)",
2175                     (unsigned long) (eni_vcc->recv - eni_dev->ram),
2176                     eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1,
2177                     eni_vcc->words*4);
2178                 if (eni_vcc->tx) length += sprintf(page+length,", ");
2179             }
2180             if (eni_vcc->tx)
2181                 length += sprintf(page+length,"tx[%d], txing %d bytes",
2182                     eni_vcc->tx->index,eni_vcc->txing);
2183             page[length] = '\n';
2184             read_unlock(&vcc_sklist_lock);
2185             return length+1;
2186         }
2187     }
2188     read_unlock(&vcc_sklist_lock);
2189     for (i = 0; i < eni_dev->free_len; i++) {
2190         struct eni_free *fe = eni_dev->free_list+i;
2191         unsigned long offset;
2192
2193         if (--left) continue;
2194         offset = (unsigned long) eni_dev->ram+eni_dev->base_diff;
2195         return sprintf(page,"free      %p-%p (%6d bytes)\n",
2196             fe->start-offset,fe->start-offset+(1 << fe->order)-1,
2197             1 << fe->order);
2198     }
2199     return 0;
2200 }
2201
2202
2203 static const struct atmdev_ops ops = {
2204     .open       = eni_open,
2205     .close      = eni_close,
2206     .ioctl      = eni_ioctl,
2207     .send       = eni_send,
2208     .phy_put    = eni_phy_put,
2209     .phy_get    = eni_phy_get,
2210     .change_qos = eni_change_qos,
2211     .proc_read  = eni_proc_read
2212 };
2213
2214
2215 static int eni_init_one(struct pci_dev *pci_dev,
2216             const struct pci_device_id *ent)
2217 {
2218     struct atm_dev *dev;
2219     struct eni_dev *eni_dev;
2220     struct eni_zero *zero;
2221     int rc;
2222
2223     rc = pci_enable_device(pci_dev);
2224     if (rc < 0)
2225         goto out;
2226
2227     rc = dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(32));
2228     if (rc < 0)
2229         goto err_disable;
2230
2231     rc = -ENOMEM;
2232     eni_dev = kmalloc(sizeof(struct eni_dev), GFP_KERNEL);
2233     if (!eni_dev)
2234         goto err_disable;
2235
2236     zero = &eni_dev->zero;
2237     zero->addr = dma_alloc_coherent(&pci_dev->dev,
2238                     ENI_ZEROES_SIZE, &zero->dma, GFP_KERNEL);
2239     if (!zero->addr)
2240         goto err_kfree;
2241
2242     dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL);
2243     if (!dev)
2244         goto err_free_consistent;
2245
2246     dev->dev_data = eni_dev;
2247     pci_set_drvdata(pci_dev, dev);
2248     eni_dev->pci_dev = pci_dev;
2249     eni_dev->asic = ent->driver_data;
2250
2251     rc = eni_do_init(dev);
2252     if (rc < 0)
2253         goto err_unregister;
2254
2255     rc = eni_start(dev);
2256     if (rc < 0)
2257         goto err_eni_release;
2258
2259     eni_dev->more = eni_boards;
2260     eni_boards = dev;
2261 out:
2262     return rc;
2263
2264 err_eni_release:
2265     dev->phy = NULL;
2266     iounmap(ENI_DEV(dev)->ioaddr);
2267 err_unregister:
2268     atm_dev_deregister(dev);
2269 err_free_consistent:
2270     dma_free_coherent(&pci_dev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
2271 err_kfree:
2272     kfree(eni_dev);
2273 err_disable:
2274     pci_disable_device(pci_dev);
2275     goto out;
2276 }
2277
2278
2279 static const struct pci_device_id eni_pci_tbl[] = {
2280     { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_FPGA), 0 /* FPGA */ },
2281     { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_ASIC), 1 /* ASIC */ },
2282     { 0, }
2283 };
2284 MODULE_DEVICE_TABLE(pci,eni_pci_tbl);
2285
2286
2287 static void eni_remove_one(struct pci_dev *pdev)
2288 {
2289     struct atm_dev *dev = pci_get_drvdata(pdev);
2290     struct eni_dev *ed = ENI_DEV(dev);
2291     struct eni_zero *zero = &ed->zero;
2292
2293     eni_do_release(dev);
2294     atm_dev_deregister(dev);
2295     dma_free_coherent(&pdev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
2296     kfree(ed);
2297     pci_disable_device(pdev);
2298 }
2299
2300
2301 static struct pci_driver eni_driver = {
2302     .name       = DEV_LABEL,
2303     .id_table   = eni_pci_tbl,
2304     .probe      = eni_init_one,
2305     .remove     = eni_remove_one,
2306 };
2307
2308
2309 static int __init eni_init(void)
2310 {
2311     struct sk_buff *skb; /* dummy for sizeof */
2312
2313     BUILD_BUG_ON(sizeof(skb->cb) < sizeof(struct eni_skb_prv));
2314     return pci_register_driver(&eni_driver);
2315 }
2316
2317
2318 module_init(eni_init);
2319 /* @@@ since exit routine not defined, this module can not be unloaded */
2320
2321 MODULE_LICENSE("GPL");