diff options
Diffstat (limited to 'drivers/atm/eni.c')
| -rw-r--r-- | drivers/atm/eni.c | 2321 |
1 files changed, 2321 insertions, 0 deletions
diff --git a/drivers/atm/eni.c b/drivers/atm/eni.c new file mode 100644 index 000000000..a31ffe16e --- /dev/null +++ b/drivers/atm/eni.c @@ -0,0 +1,2321 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* drivers/atm/eni.c - Efficient Networks ENI155P device driver */ + +/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ + + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/pci.h> +#include <linux/errno.h> +#include <linux/atm.h> +#include <linux/atmdev.h> +#include <linux/sonet.h> +#include <linux/skbuff.h> +#include <linux/time.h> +#include <linux/delay.h> +#include <linux/uio.h> +#include <linux/init.h> +#include <linux/atm_eni.h> +#include <linux/bitops.h> +#include <linux/slab.h> +#include <asm/io.h> +#include <linux/atomic.h> +#include <linux/uaccess.h> +#include <asm/string.h> +#include <asm/byteorder.h> + +#include "tonga.h" +#include "midway.h" +#include "suni.h" +#include "eni.h" + +/* + * 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 = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len, + DMA_FROM_DEVICE); + if (dma_mapping_error(&eni_dev->pci_dev->dev, paddr)) + goto dma_map_error; + 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; + dma[j++] = 0; + } + 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; + dma[j++] = 0; + } + 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 "(itf %d): RX DMA full\n", + vcc->dev->number); + goto trouble; + } + for (i = 0; i < j; i++) { + writel(dma[i*2],eni_dev->rx_dma+dma_wr*8); + writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4); + dma_wr = (dma_wr+1) & (NR_DMA_RX-1); + } + if (skb) { + ENI_PRV_POS(skb) = eni_vcc->descr+size+1; + skb_queue_tail(&eni_dev->rx_queue,skb); + eni_vcc->last = skb; + rx_enqueued++; + } + eni_vcc->descr = here; + eni_out(dma_wr,MID_DMA_WR_RX); + return 0; + +trouble: + if (paddr) + dma_unmap_single(&eni_dev->pci_dev->dev,paddr,skb->len, + DMA_FROM_DEVICE); +dma_map_error: + if (skb) dev_kfree_skb_irq(skb); + return -1; +} + + +static void discard(struct atm_vcc *vcc,unsigned long size) +{ + struct eni_vcc *eni_vcc; + + eni_vcc = ENI_VCC(vcc); + EVENT("discard (size=%ld)\n",size,0); + while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0); + /* could do a full fallback, but that might be more expensive */ + if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1; + else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1); +} + + +/* + * TODO: should check whether direct copies (without DMA setup, dequeuing on + * interrupt, etc.) aren't much faster for AAL0 + */ + +static int rx_aal0(struct atm_vcc *vcc) +{ + struct eni_vcc *eni_vcc; + unsigned long descr; + unsigned long length; + struct sk_buff *skb; + + DPRINTK(">rx_aal0\n"); + eni_vcc = ENI_VCC(vcc); + descr = readl(eni_vcc->recv+eni_vcc->descr*4); + if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) { + rx_ident_err(vcc); + return 1; + } + if (descr & MID_RED_T) { + DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n", + vcc->dev->number); + length = 0; + atomic_inc(&vcc->stats->rx_err); + } + else { + length = ATM_CELL_SIZE-1; /* no HEC */ + } + skb = length ? atm_alloc_charge(vcc,length,GFP_ATOMIC) : NULL; + if (!skb) { + discard(vcc,length >> 2); + return 0; + } + skb_put(skb,length); + skb->tstamp = eni_vcc->timestamp; + DPRINTK("got len %ld\n",length); + if (do_rx_dma(vcc,skb,1,length >> 2,length >> 2)) return 1; + eni_vcc->rxing++; + return 0; +} + + +static int rx_aal5(struct atm_vcc *vcc) +{ + struct eni_vcc *eni_vcc; + unsigned long descr; + unsigned long size,eff,length; + struct sk_buff *skb; + + EVENT("rx_aal5\n",0,0); + DPRINTK(">rx_aal5\n"); + eni_vcc = ENI_VCC(vcc); + descr = readl(eni_vcc->recv+eni_vcc->descr*4); + if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) { + rx_ident_err(vcc); + return 1; + } + if (descr & (MID_RED_T | MID_RED_CRC_ERR)) { + if (descr & MID_RED_T) { + EVENT("empty cell (descr=0x%lx)\n",descr,0); + DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n", + vcc->dev->number); + size = 0; + } + else { + static unsigned long silence = 0; + + if (time_after(jiffies, silence) || silence == 0) { + printk(KERN_WARNING DEV_LABEL "(itf %d): " + "discarding PDU(s) with CRC error\n", + vcc->dev->number); + silence = (jiffies+2*HZ)|1; + } + size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2); + EVENT("CRC error (descr=0x%lx,size=%ld)\n",descr, + size); + } + eff = length = 0; + atomic_inc(&vcc->stats->rx_err); + } + else { + size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2); + DPRINTK("size=%ld\n",size); + length = readl(eni_vcc->recv+(((eni_vcc->descr+size-1) & + (eni_vcc->words-1)))*4) & 0xffff; + /* -trailer(2)+header(1) */ + if (length && length <= (size << 2)-8 && length <= + ATM_MAX_AAL5_PDU) eff = (length+3) >> 2; + else { /* ^ trailer length (8) */ + EVENT("bad PDU (descr=0x08%lx,length=%ld)\n",descr, + length); + printk(KERN_ERR DEV_LABEL "(itf %d): bad AAL5 PDU " + "(VCI=%d,length=%ld,size=%ld (descr 0x%lx))\n", + vcc->dev->number,vcc->vci,length,size << 2,descr); + length = eff = 0; + atomic_inc(&vcc->stats->rx_err); + } + } + skb = eff ? atm_alloc_charge(vcc,eff << 2,GFP_ATOMIC) : NULL; + if (!skb) { + discard(vcc,size); + return 0; + } + skb_put(skb,length); + DPRINTK("got len %ld\n",length); + if (do_rx_dma(vcc,skb,1,size,eff)) return 1; + eni_vcc->rxing++; + return 0; +} + + +static inline int rx_vcc(struct atm_vcc *vcc) +{ + void __iomem *vci_dsc; + unsigned long tmp; + struct eni_vcc *eni_vcc; + + eni_vcc = ENI_VCC(vcc); + vci_dsc = ENI_DEV(vcc->dev)->vci+vcc->vci*16; + EVENT("rx_vcc(1)\n",0,0); + while (eni_vcc->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) >> + MID_VCI_DESCR_SHIFT)) { + EVENT("rx_vcc(2: host dsc=0x%lx, nic dsc=0x%lx)\n", + eni_vcc->descr,tmp); + DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr, + (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >> + MID_VCI_DESCR_SHIFT)); + if (ENI_VCC(vcc)->rx(vcc)) return 1; + } + /* clear IN_SERVICE flag */ + writel(readl(vci_dsc) & ~MID_VCI_IN_SERVICE,vci_dsc); + /* + * If new data has arrived between evaluating the while condition and + * clearing IN_SERVICE, we wouldn't be notified until additional data + * follows. So we have to loop again to be sure. + */ + EVENT("rx_vcc(3)\n",0,0); + while (ENI_VCC(vcc)->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) + >> MID_VCI_DESCR_SHIFT)) { + EVENT("rx_vcc(4: host dsc=0x%lx, nic dsc=0x%lx)\n", + eni_vcc->descr,tmp); + DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr, + (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >> + MID_VCI_DESCR_SHIFT)); + if (ENI_VCC(vcc)->rx(vcc)) return 1; + } + return 0; +} + + +static void poll_rx(struct atm_dev *dev) +{ + struct eni_dev *eni_dev; + struct atm_vcc *curr; + + eni_dev = ENI_DEV(dev); + while ((curr = eni_dev->fast)) { + EVENT("poll_rx.fast\n",0,0); + if (rx_vcc(curr)) return; + eni_dev->fast = ENI_VCC(curr)->next; + ENI_VCC(curr)->next = ENI_VCC_NOS; + barrier(); + ENI_VCC(curr)->servicing--; + } + while ((curr = eni_dev->slow)) { + EVENT("poll_rx.slow\n",0,0); + if (rx_vcc(curr)) return; + eni_dev->slow = ENI_VCC(curr)->next; + ENI_VCC(curr)->next = ENI_VCC_NOS; + barrier(); + ENI_VCC(curr)->servicing--; + } +} + + +static void get_service(struct atm_dev *dev) +{ + struct eni_dev *eni_dev; + struct atm_vcc *vcc; + unsigned long vci; + + DPRINTK(">get_service\n"); + eni_dev = ENI_DEV(dev); + while (eni_in(MID_SERV_WRITE) != eni_dev->serv_read) { + vci = readl(eni_dev->service+eni_dev->serv_read*4); + eni_dev->serv_read = (eni_dev->serv_read+1) & (NR_SERVICE-1); + vcc = eni_dev->rx_map[vci & 1023]; + if (!vcc) { + printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %ld not " + "found\n",dev->number,vci); + continue; /* nasty but we try to go on anyway */ + /* @@@ nope, doesn't work */ + } + EVENT("getting from service\n",0,0); + if (ENI_VCC(vcc)->next != ENI_VCC_NOS) { + EVENT("double service\n",0,0); + DPRINTK("Grr, servicing VCC %ld twice\n",vci); + continue; + } + ENI_VCC(vcc)->timestamp = ktime_get_real(); + ENI_VCC(vcc)->next = NULL; + if (vcc->qos.rxtp.traffic_class == ATM_CBR) { + if (eni_dev->fast) + ENI_VCC(eni_dev->last_fast)->next = vcc; + else eni_dev->fast = vcc; + eni_dev->last_fast = vcc; + } + else { + if (eni_dev->slow) + ENI_VCC(eni_dev->last_slow)->next = vcc; + else eni_dev->slow = vcc; + eni_dev->last_slow = vcc; + } + putting++; + ENI_VCC(vcc)->servicing++; + } +} + + +static void dequeue_rx(struct atm_dev *dev) +{ + struct eni_dev *eni_dev; + struct eni_vcc *eni_vcc; + struct atm_vcc *vcc; + struct sk_buff *skb; + void __iomem *vci_dsc; + int first; + + eni_dev = ENI_DEV(dev); + first = 1; + while (1) { + skb = skb_dequeue(&eni_dev->rx_queue); + if (!skb) { + if (first) { + DPRINTK(DEV_LABEL "(itf %d): RX but not " + "rxing\n",dev->number); + EVENT("nothing to dequeue\n",0,0); + } + break; + } + EVENT("dequeued (size=%ld,pos=0x%lx)\n",ENI_PRV_SIZE(skb), + ENI_PRV_POS(skb)); + rx_dequeued++; + vcc = ATM_SKB(skb)->vcc; + eni_vcc = ENI_VCC(vcc); + first = 0; + vci_dsc = eni_dev->vci+vcc->vci*16; + if (!EEPMOK(eni_vcc->rx_pos,ENI_PRV_SIZE(skb), + (readl(vci_dsc+4) & MID_VCI_READ) >> MID_VCI_READ_SHIFT, + eni_vcc->words)) { + EVENT("requeuing\n",0,0); + skb_queue_head(&eni_dev->rx_queue,skb); + break; + } + eni_vcc->rxing--; + eni_vcc->rx_pos = ENI_PRV_POS(skb) & (eni_vcc->words-1); + dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len, + DMA_TO_DEVICE); + if (!skb->len) dev_kfree_skb_irq(skb); + else { + EVENT("pushing (len=%ld)\n",skb->len,0); + if (vcc->qos.aal == ATM_AAL0) + *(unsigned long *) skb->data = + ntohl(*(unsigned long *) skb->data); + memset(skb->cb,0,sizeof(struct eni_skb_prv)); + vcc->push(vcc,skb); + pushed++; + } + atomic_inc(&vcc->stats->rx); + } + wake_up(&eni_dev->rx_wait); +} + + +static int open_rx_first(struct atm_vcc *vcc) +{ + struct eni_dev *eni_dev; + struct eni_vcc *eni_vcc; + unsigned long size; + + DPRINTK("open_rx_first\n"); + eni_dev = ENI_DEV(vcc->dev); + eni_vcc = ENI_VCC(vcc); + eni_vcc->rx = NULL; + if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0; + size = vcc->qos.rxtp.max_sdu*eni_dev->rx_mult/100; + if (size > MID_MAX_BUF_SIZE && vcc->qos.rxtp.max_sdu <= + MID_MAX_BUF_SIZE) + size = MID_MAX_BUF_SIZE; + eni_vcc->recv = eni_alloc_mem(eni_dev,&size); + DPRINTK("rx at 0x%lx\n",eni_vcc->recv); + eni_vcc->words = size >> 2; + if (!eni_vcc->recv) return -ENOBUFS; + eni_vcc->rx = vcc->qos.aal == ATM_AAL5 ? rx_aal5 : rx_aal0; + eni_vcc->descr = 0; + eni_vcc->rx_pos = 0; + eni_vcc->rxing = 0; + eni_vcc->servicing = 0; + eni_vcc->next = ENI_VCC_NOS; + return 0; +} + + +static int open_rx_second(struct atm_vcc *vcc) +{ + void __iomem *here; + struct eni_dev *eni_dev; + struct eni_vcc *eni_vcc; + unsigned long size; + int order; + + DPRINTK("open_rx_second\n"); + eni_dev = ENI_DEV(vcc->dev); + eni_vcc = ENI_VCC(vcc); + if (!eni_vcc->rx) return 0; + /* set up VCI descriptor */ + here = eni_dev->vci+vcc->vci*16; + DPRINTK("loc 0x%x\n",(unsigned) (eni_vcc->recv-eni_dev->ram)/4); + size = eni_vcc->words >> 8; + for (order = -1; size; order++) size >>= 1; + writel(0,here+4); /* descr, read = 0 */ + writel(0,here+8); /* write, state, count = 0 */ + if (eni_dev->rx_map[vcc->vci]) + printk(KERN_CRIT DEV_LABEL "(itf %d): BUG - VCI %d already " + "in use\n",vcc->dev->number,vcc->vci); + eni_dev->rx_map[vcc->vci] = vcc; /* now it counts */ + writel(((vcc->qos.aal != ATM_AAL5 ? MID_MODE_RAW : MID_MODE_AAL5) << + MID_VCI_MODE_SHIFT) | MID_VCI_PTI_MODE | + (((eni_vcc->recv-eni_dev->ram) >> (MID_LOC_SKIP+2)) << + MID_VCI_LOCATION_SHIFT) | (order << MID_VCI_SIZE_SHIFT),here); + return 0; +} + + +static void close_rx(struct atm_vcc *vcc) +{ + DECLARE_WAITQUEUE(wait,current); + void __iomem *here; + struct eni_dev *eni_dev; + struct eni_vcc *eni_vcc; + + eni_vcc = ENI_VCC(vcc); + if (!eni_vcc->rx) return; + eni_dev = ENI_DEV(vcc->dev); + if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) { + here = eni_dev->vci+vcc->vci*16; + /* block receiver */ + writel((readl(here) & ~MID_VCI_MODE) | (MID_MODE_TRASH << + MID_VCI_MODE_SHIFT),here); + /* wait for receiver to become idle */ + udelay(27); + /* discard pending cell */ + writel(readl(here) & ~MID_VCI_IN_SERVICE,here); + /* don't accept any new ones */ + eni_dev->rx_map[vcc->vci] = NULL; + /* wait for RX queue to drain */ + DPRINTK("eni_close: waiting for RX ...\n"); + EVENT("RX closing\n",0,0); + add_wait_queue(&eni_dev->rx_wait,&wait); + set_current_state(TASK_UNINTERRUPTIBLE); + barrier(); + for (;;) { + /* transition service->rx: rxing++, servicing-- */ + if (!eni_vcc->servicing) { + barrier(); + if (!eni_vcc->rxing) break; + } + EVENT("drain PDUs (rx %ld, serv %ld)\n",eni_vcc->rxing, + eni_vcc->servicing); + printk(KERN_INFO "%d+%d RX left\n",eni_vcc->servicing, + eni_vcc->rxing); + schedule(); + set_current_state(TASK_UNINTERRUPTIBLE); + } + for (;;) { + int at_end; + u32 tmp; + + tasklet_disable(&eni_dev->task); + tmp = readl(eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ; + at_end = eni_vcc->rx_pos == tmp >> MID_VCI_READ_SHIFT; + tasklet_enable(&eni_dev->task); + if (at_end) break; + EVENT("drain discard (host 0x%lx, nic 0x%lx)\n", + eni_vcc->rx_pos,tmp); + printk(KERN_INFO "draining RX: host 0x%lx, nic 0x%x\n", + eni_vcc->rx_pos,tmp); + schedule(); + set_current_state(TASK_UNINTERRUPTIBLE); + } + set_current_state(TASK_RUNNING); + remove_wait_queue(&eni_dev->rx_wait,&wait); + } + eni_free_mem(eni_dev,eni_vcc->recv,eni_vcc->words << 2); + eni_vcc->rx = NULL; +} + + +static int start_rx(struct atm_dev *dev) +{ + struct eni_dev *eni_dev; + + eni_dev = ENI_DEV(dev); + eni_dev->rx_map = (struct atm_vcc **) get_zeroed_page(GFP_KERNEL); + if (!eni_dev->rx_map) { + printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n", + dev->number); + free_page((unsigned long) eni_dev->free_list); + return -ENOMEM; + } + eni_dev->rx_mult = DEFAULT_RX_MULT; + eni_dev->fast = eni_dev->last_fast = NULL; + eni_dev->slow = eni_dev->last_slow = NULL; + init_waitqueue_head(&eni_dev->rx_wait); + skb_queue_head_init(&eni_dev->rx_queue); + eni_dev->serv_read = eni_in(MID_SERV_WRITE); + eni_out(0,MID_DMA_WR_RX); + return 0; +} + + +/*----------------------------------- TX ------------------------------------*/ + + +enum enq_res { enq_ok,enq_next,enq_jam }; + + +static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr, + u32 size) +{ + u32 init,words; + + DPRINTK("put_dma: 0x%lx+0x%x\n",(unsigned long) paddr,size); + EVENT("put_dma: 0x%lx+0x%lx\n",(unsigned long) paddr,size); +#if 0 /* don't complain anymore */ + if (paddr & 3) + printk(KERN_ERR "put_dma: unaligned addr (0x%lx)\n",paddr); + if (size & 3) + printk(KERN_ERR "put_dma: unaligned size (0x%lx)\n",size); +#endif + if (paddr & 3) { + init = 4-(paddr & 3); + if (init > size || size < 7) init = size; + DPRINTK("put_dma: %lx DMA: %d/%d bytes\n", + (unsigned long) paddr,init,size); + dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) | + (chan << MID_DMA_CHAN_SHIFT); + dma[(*j)++] = paddr; + paddr += init; + size -= init; + } + words = size >> 2; + size &= 3; + if (words && (paddr & 31)) { + init = 8-((paddr & 31) >> 2); + if (init > words) init = words; + DPRINTK("put_dma: %lx DMA: %d/%d words\n", + (unsigned long) paddr,init,words); + dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) | + (chan << MID_DMA_CHAN_SHIFT); + dma[(*j)++] = paddr; + paddr += init << 2; + words -= init; + } +#ifdef CONFIG_ATM_ENI_BURST_TX_16W /* may work with some PCI chipsets ... */ + if (words & ~15) { + DPRINTK("put_dma: %lx DMA: %d*16/%d words\n", + (unsigned long) paddr,words >> 4,words); + dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT) + | (chan << MID_DMA_CHAN_SHIFT); + dma[(*j)++] = paddr; + paddr += (words & ~15) << 2; + words &= 15; + } +#endif +#ifdef CONFIG_ATM_ENI_BURST_TX_8W /* recommended */ + if (words & ~7) { + DPRINTK("put_dma: %lx DMA: %d*8/%d words\n", + (unsigned long) paddr,words >> 3,words); + dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT) + | (chan << MID_DMA_CHAN_SHIFT); + dma[(*j)++] = paddr; + paddr += (words & ~7) << 2; + words &= 7; + } +#endif +#ifdef CONFIG_ATM_ENI_BURST_TX_4W /* probably useless if TX_8W or TX_16W */ + if (words & ~3) { + DPRINTK("put_dma: %lx DMA: %d*4/%d words\n", + (unsigned long) paddr,words >> 2,words); + dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT) + | (chan << MID_DMA_CHAN_SHIFT); + dma[(*j)++] = paddr; + paddr += (words & ~3) << 2; + words &= 3; + } +#endif +#ifdef CONFIG_ATM_ENI_BURST_TX_2W /* probably useless if TX_4W, TX_8W, ... */ + if (words & ~1) { + DPRINTK("put_dma: %lx DMA: %d*2/%d words\n", + (unsigned long) paddr,words >> 1,words); + dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT) + | (chan << MID_DMA_CHAN_SHIFT); + dma[(*j)++] = paddr; + paddr += (words & ~1) << 2; + words &= 1; + } +#endif + if (words) { + DPRINTK("put_dma: %lx DMA: %d words\n",(unsigned long) paddr, + words); + dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) | + (chan << MID_DMA_CHAN_SHIFT); + dma[(*j)++] = paddr; + paddr += words << 2; + } + if (size) { + DPRINTK("put_dma: %lx DMA: %d bytes\n",(unsigned long) paddr, + size); + dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) | + (chan << MID_DMA_CHAN_SHIFT); + dma[(*j)++] = paddr; + } +} + + +static enum enq_res do_tx(struct sk_buff *skb) +{ + struct atm_vcc *vcc; + struct eni_dev *eni_dev; + struct eni_vcc *eni_vcc; + struct eni_tx *tx; + dma_addr_t paddr; + u32 dma_rd,dma_wr; + u32 size; /* in words */ + int aal5,dma_size,i,j; + unsigned char skb_data3; + + DPRINTK(">do_tx\n"); + NULLCHECK(skb); + EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,skb->len); + vcc = ATM_SKB(skb)->vcc; + NULLCHECK(vcc); + eni_dev = ENI_DEV(vcc->dev); + NULLCHECK(eni_dev); + eni_vcc = ENI_VCC(vcc); + tx = eni_vcc->tx; + NULLCHECK(tx); +#if 0 /* Enable this for testing with the "align" program */ + { + unsigned int hack = *((char *) skb->data)-'0'; + + if (hack < 8) { + skb->data += hack; + skb->len -= hack; + } + } +#endif +#if 0 /* should work now */ + if ((unsigned long) skb->data & 3) + printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned " + "TX data\n",vcc->dev->number,vcc->vci); +#endif + /* + * Potential future IP speedup: make hard_header big enough to put + * segmentation descriptor directly into PDU. Saves: 4 slave writes, + * 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-) + */ + + aal5 = vcc->qos.aal == ATM_AAL5; + /* check space in buffer */ + if (!aal5) + size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE; + /* cell without HEC plus segmentation header (includes + four-byte cell header) */ + else { + size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1; + /* add AAL5 trailer */ + size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE; + /* add segmentation header */ + } + /* + * Can I move tx_pos by size bytes without getting closer than TX_GAP + * to the read pointer ? TX_GAP means to leave some space for what + * the manual calls "too close". + */ + if (!NEPMOK(tx->tx_pos,size+TX_GAP, + eni_in(MID_TX_RDPTR(tx->index)),tx->words)) { + DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n", + vcc->dev->number,size); + return enq_next; + } + /* check DMA */ + dma_wr = eni_in(MID_DMA_WR_TX); + dma_rd = eni_in(MID_DMA_RD_TX); + dma_size = 3; /* JK for descriptor and final fill, plus final size + mis-alignment fix */ +DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags); + if (!skb_shinfo(skb)->nr_frags) dma_size += 5; + else dma_size += 5*(skb_shinfo(skb)->nr_frags+1); + if (dma_size > TX_DMA_BUF) { + printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries " + "(got only %d)\n",vcc->dev->number,dma_size,TX_DMA_BUF); + } + DPRINTK("dma_wr is %d, tx_pos is %ld\n",dma_wr,tx->tx_pos); + if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) < + dma_size) { + printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n", + vcc->dev->number); + return enq_jam; + } + skb_data3 = skb->data[3]; + paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len, + DMA_TO_DEVICE); + if (dma_mapping_error(&eni_dev->pci_dev->dev, paddr)) + return enq_next; + ENI_PRV_PADDR(skb) = paddr; + /* prepare DMA queue entries */ + j = 0; + eni_dev->dma[j++] = (((tx->tx_pos+TX_DESCR_SIZE) & (tx->words-1)) << + MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) | + MID_DT_JK; + j++; + if (!skb_shinfo(skb)->nr_frags) + if (aal5) put_dma(tx->index,eni_dev->dma,&j,paddr,skb->len); + else put_dma(tx->index,eni_dev->dma,&j,paddr+4,skb->len-4); + else { +DPRINTK("doing direct send\n"); /* @@@ well, this doesn't work anyway */ + for (i = -1; i < skb_shinfo(skb)->nr_frags; i++) + if (i == -1) + put_dma(tx->index,eni_dev->dma,&j,(unsigned long) + skb->data, + skb_headlen(skb)); + else + put_dma(tx->index,eni_dev->dma,&j,(unsigned long) + skb_frag_page(&skb_shinfo(skb)->frags[i]) + + skb_frag_off(&skb_shinfo(skb)->frags[i]), + skb_frag_size(&skb_shinfo(skb)->frags[i])); + } + if (skb->len & 3) { + put_dma(tx->index, eni_dev->dma, &j, eni_dev->zero.dma, + 4 - (skb->len & 3)); + } + /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */ + eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) << + MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) | + MID_DMA_END | MID_DT_JK; + j++; + DPRINTK("DMA at end: %d\n",j); + /* store frame */ + writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) | + (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) | + (tx->resolution << MID_SEG_RATE_SHIFT) | + (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4); +/*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/ + writel((vcc->vci << MID_SEG_VCI_SHIFT) | + (aal5 ? 0 : (skb_data3 & 0xf)) | + (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0), + tx->send+((tx->tx_pos+1) & (tx->words-1))*4); + DPRINTK("size: %d, len:%d\n",size,skb->len); + if (aal5) + writel(skb->len,tx->send+ + ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4); + j = j >> 1; + for (i = 0; i < j; i++) { + writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8); + writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4); + dma_wr = (dma_wr+1) & (NR_DMA_TX-1); + } + ENI_PRV_POS(skb) = tx->tx_pos; + ENI_PRV_SIZE(skb) = size; + ENI_VCC(vcc)->txing += size; + tx->tx_pos = (tx->tx_pos+size) & (tx->words-1); + DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos); + eni_out(dma_wr,MID_DMA_WR_TX); + skb_queue_tail(&eni_dev->tx_queue,skb); + queued++; + return enq_ok; +} + + +static void poll_tx(struct atm_dev *dev) +{ + struct eni_tx *tx; + struct sk_buff *skb; + enum enq_res res; + int i; + + DPRINTK(">poll_tx\n"); + for (i = NR_CHAN-1; i >= 0; i--) { + tx = &ENI_DEV(dev)->tx[i]; + if (tx->send) + while ((skb = skb_dequeue(&tx->backlog))) { + res = do_tx(skb); + if (res == enq_ok) continue; + DPRINTK("re-queuing TX PDU\n"); + skb_queue_head(&tx->backlog,skb); + requeued++; + if (res == enq_jam) return; + break; + } + } +} + + +static void dequeue_tx(struct atm_dev *dev) +{ + struct eni_dev *eni_dev; + struct atm_vcc *vcc; + struct sk_buff *skb; + struct eni_tx *tx; + + NULLCHECK(dev); + eni_dev = ENI_DEV(dev); + NULLCHECK(eni_dev); + while ((skb = skb_dequeue(&eni_dev->tx_queue))) { + vcc = ATM_SKB(skb)->vcc; + NULLCHECK(vcc); + tx = ENI_VCC(vcc)->tx; + NULLCHECK(ENI_VCC(vcc)->tx); + DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb), + (unsigned) eni_in(MID_TX_DESCRSTART(tx->index))); + if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) == + eni_in(MID_TX_DESCRSTART(tx->index))) { + skb_queue_head(&eni_dev->tx_queue,skb); + break; + } + ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb); + dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len, + DMA_TO_DEVICE); + if (vcc->pop) vcc->pop(vcc,skb); + else dev_kfree_skb_irq(skb); + atomic_inc(&vcc->stats->tx); + wake_up(&eni_dev->tx_wait); + dma_complete++; + } +} + + +static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr) +{ + int i; + + for (i = !ubr; i < NR_CHAN; i++) + if (!eni_dev->tx[i].send) return eni_dev->tx+i; + return NULL; +} + + +static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre, + int *res,int unlimited) +{ + static const int pre_div[] = { 4,16,128,2048 }; + /* 2^(((x+2)^2-(x+2))/2+1) */ + + if (unlimited) *pre = *res = 0; + else { + if (*pcr > 0) { + int div; + + for (*pre = 0; *pre < 3; (*pre)++) + if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break; + div = pre_div[*pre]**pcr; + DPRINTK("min div %d\n",div); + *res = TS_CLOCK/div-1; + } + else { + int div; + + if (!*pcr) *pcr = eni_dev->tx_bw+reserved; + for (*pre = 3; *pre >= 0; (*pre)--) + if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break; + if (*pre < 3) (*pre)++; /* else fail later */ + div = pre_div[*pre]*-*pcr; + DPRINTK("max div %d\n",div); + *res = DIV_ROUND_UP(TS_CLOCK, div)-1; + } + if (*res < 0) *res = 0; + if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE; + } + *pcr = TS_CLOCK/pre_div[*pre]/(*res+1); + DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res); + return 0; +} + + +static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp, + int set_rsv,int set_shp) +{ + struct eni_dev *eni_dev = ENI_DEV(vcc->dev); + struct eni_vcc *eni_vcc = ENI_VCC(vcc); + struct eni_tx *tx; + unsigned long size; + void __iomem *mem; + int rate,ubr,unlimited,new_tx; + int pre,res,order; + int error; + + rate = atm_pcr_goal(txtp); + ubr = txtp->traffic_class == ATM_UBR; + unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR || + rate >= ATM_OC3_PCR); + if (!unlimited) { + size = txtp->max_sdu*eni_dev->tx_mult/100; + if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <= + MID_MAX_BUF_SIZE) + size = MID_MAX_BUF_SIZE; + } + else { + if (eni_dev->ubr) { + eni_vcc->tx = eni_dev->ubr; + txtp->pcr = ATM_OC3_PCR; + return 0; + } + size = UBR_BUFFER; + } + new_tx = !eni_vcc->tx; + mem = NULL; /* for gcc */ + if (!new_tx) tx = eni_vcc->tx; + else { + mem = eni_alloc_mem(eni_dev,&size); + if (!mem) return -ENOBUFS; + tx = alloc_tx(eni_dev,unlimited); + if (!tx) { + eni_free_mem(eni_dev,mem,size); + return -EBUSY; + } + DPRINTK("got chan %d\n",tx->index); + tx->reserved = tx->shaping = 0; + tx->send = mem; + tx->words = size >> 2; + skb_queue_head_init(&tx->backlog); + for (order = 0; size > (1 << (order+10)); order++); + eni_out((order << MID_SIZE_SHIFT) | + ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)), + MID_TX_PLACE(tx->index)); + tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) & + MID_DESCR_START; + } + error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited); + if (!error && txtp->min_pcr > rate) error = -EINVAL; + if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR && + txtp->max_pcr < rate) error = -EINVAL; + if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved) + error = -EINVAL; + if (!error && set_rsv && !set_shp && rate < tx->shaping) + error = -EINVAL; + if (!error && !set_rsv && rate > tx->reserved && !ubr) + error = -EINVAL; + if (error) { + if (new_tx) { + tx->send = NULL; + eni_free_mem(eni_dev,mem,size); + } + return error; + } + txtp->pcr = rate; + if (set_rsv && !ubr) { + eni_dev->tx_bw += tx->reserved; + tx->reserved = rate; + eni_dev->tx_bw -= rate; + } + if (set_shp || (unlimited && new_tx)) { + if (unlimited && new_tx) eni_dev->ubr = tx; + tx->prescaler = pre; + tx->resolution = res; + tx->shaping = rate; + } + if (set_shp) eni_vcc->tx = tx; + DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping); + return 0; +} + + +static int open_tx_first(struct atm_vcc *vcc) +{ + ENI_VCC(vcc)->tx = NULL; + if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0; + ENI_VCC(vcc)->txing = 0; + return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1); +} + + +static int open_tx_second(struct atm_vcc *vcc) +{ + return 0; /* nothing to do */ +} + + +static void close_tx(struct atm_vcc *vcc) +{ + DECLARE_WAITQUEUE(wait,current); + struct eni_dev *eni_dev; + struct eni_vcc *eni_vcc; + + eni_vcc = ENI_VCC(vcc); + if (!eni_vcc->tx) return; + eni_dev = ENI_DEV(vcc->dev); + /* wait for TX queue to drain */ + DPRINTK("eni_close: waiting for TX ...\n"); + add_wait_queue(&eni_dev->tx_wait,&wait); + set_current_state(TASK_UNINTERRUPTIBLE); + for (;;) { + int txing; + + tasklet_disable(&eni_dev->task); + txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing; + tasklet_enable(&eni_dev->task); + if (!txing) break; + DPRINTK("%d TX left\n",eni_vcc->txing); + schedule(); + set_current_state(TASK_UNINTERRUPTIBLE); + } + set_current_state(TASK_RUNNING); + remove_wait_queue(&eni_dev->tx_wait,&wait); + if (eni_vcc->tx != eni_dev->ubr) { + /* + * Looping a few times in here is probably far cheaper than + * keeping track of TX completions all the time, so let's poll + * a bit ... + */ + while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) != + eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index))) + schedule(); + eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2); + eni_vcc->tx->send = NULL; + eni_dev->tx_bw += eni_vcc->tx->reserved; + } + eni_vcc->tx = NULL; +} + + +static int start_tx(struct atm_dev *dev) +{ + struct eni_dev *eni_dev; + int i; + + eni_dev = ENI_DEV(dev); + eni_dev->lost = 0; + eni_dev->tx_bw = ATM_OC3_PCR; + eni_dev->tx_mult = DEFAULT_TX_MULT; + init_waitqueue_head(&eni_dev->tx_wait); + eni_dev->ubr = NULL; + skb_queue_head_init(&eni_dev->tx_queue); + eni_out(0,MID_DMA_WR_TX); + for (i = 0; i < NR_CHAN; i++) { + eni_dev->tx[i].send = NULL; + eni_dev->tx[i].index = i; + } + return 0; +} + + +/*--------------------------------- common ----------------------------------*/ + + +#if 0 /* may become useful again when tuning things */ + +static void foo(void) +{ +printk(KERN_INFO + "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n" + "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n", + tx_complete,dma_complete,queued,requeued,submitted,backlogged, + rx_enqueued,rx_dequeued,putting,pushed); +if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost); +} + +#endif + + +static void bug_int(struct atm_dev *dev,unsigned long reason) +{ + DPRINTK(">bug_int\n"); + if (reason & MID_DMA_ERR_ACK) + printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA " + "error\n",dev->number); + if (reason & MID_TX_IDENT_MISM) + printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident " + "mismatch\n",dev->number); + if (reason & MID_TX_DMA_OVFL) + printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA " + "overflow\n",dev->number); + EVENT("---dump ends here---\n",0,0); + printk(KERN_NOTICE "---recent events---\n"); + event_dump(); +} + + +static irqreturn_t eni_int(int irq,void *dev_id) +{ + struct atm_dev *dev; + struct eni_dev *eni_dev; + u32 reason; + + DPRINTK(">eni_int\n"); + dev = dev_id; + eni_dev = ENI_DEV(dev); + reason = eni_in(MID_ISA); + DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason); + /* + * Must handle these two right now, because reading ISA doesn't clear + * them, so they re-occur and we never make it to the tasklet. Since + * they're rare, we don't mind the occasional invocation of eni_tasklet + * with eni_dev->events == 0. + */ + if (reason & MID_STAT_OVFL) { + EVENT("stat overflow\n",0,0); + eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH; + } + if (reason & MID_SUNI_INT) { + EVENT("SUNI int\n",0,0); + dev->phy->interrupt(dev); +#if 0 + foo(); +#endif + } + spin_lock(&eni_dev->lock); + eni_dev->events |= reason; + spin_unlock(&eni_dev->lock); + tasklet_schedule(&eni_dev->task); + return IRQ_HANDLED; +} + + +static void eni_tasklet(unsigned long data) +{ + struct atm_dev *dev = (struct atm_dev *) data; + struct eni_dev *eni_dev = ENI_DEV(dev); + unsigned long flags; + u32 events; + + DPRINTK("eni_tasklet (dev %p)\n",dev); + spin_lock_irqsave(&eni_dev->lock,flags); + events = xchg(&eni_dev->events,0); + spin_unlock_irqrestore(&eni_dev->lock,flags); + if (events & MID_RX_DMA_COMPLETE) { + EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0); + dequeue_rx(dev); + EVENT("dequeue_rx done, starting poll_rx\n",0,0); + poll_rx(dev); + EVENT("poll_rx done\n",0,0); + /* poll_tx ? */ + } + if (events & MID_SERVICE) { + EVENT("INT: service, starting get_service\n",0,0); + get_service(dev); + EVENT("get_service done, starting poll_rx\n",0,0); + poll_rx(dev); + EVENT("poll_rx done\n",0,0); + } + if (events & MID_TX_DMA_COMPLETE) { + EVENT("INT: TX DMA COMPLETE\n",0,0); + dequeue_tx(dev); + } + if (events & MID_TX_COMPLETE) { + EVENT("INT: TX COMPLETE\n",0,0); + tx_complete++; + wake_up(&eni_dev->tx_wait); + /* poll_rx ? */ + } + if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) { + EVENT("bug interrupt\n",0,0); + bug_int(dev,events); + } + poll_tx(dev); +} + + +/*--------------------------------- entries ---------------------------------*/ + + +static char * const media_name[] = { + "MMF", "SMF", "MMF", "03?", /* 0- 3 */ + "UTP", "05?", "06?", "07?", /* 4- 7 */ + "TAXI","09?", "10?", "11?", /* 8-11 */ + "12?", "13?", "14?", "15?", /* 12-15 */ + "MMF", "SMF", "18?", "19?", /* 16-19 */ + "UTP", "21?", "22?", "23?", /* 20-23 */ + "24?", "25?", "26?", "27?", /* 24-27 */ + "28?", "29?", "30?", "31?" /* 28-31 */ +}; + + +#define SET_SEPROM \ + ({ if (!error && !pci_error) { \ + pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \ + udelay(10); /* 10 usecs */ \ + } }) +#define GET_SEPROM \ + ({ if (!error && !pci_error) { \ + pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \ + udelay(10); /* 10 usecs */ \ + } }) + + +static int get_esi_asic(struct atm_dev *dev) +{ + struct eni_dev *eni_dev; + unsigned char tonga; + int error,failed,pci_error; + int address,i,j; + + eni_dev = ENI_DEV(dev); + error = pci_error = 0; + tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK; + SET_SEPROM; + for (i = 0; i < ESI_LEN && !error && !pci_error; i++) { + /* start operation */ + tonga |= SEPROM_DATA; + SET_SEPROM; + tonga |= SEPROM_CLK; + SET_SEPROM; + tonga &= ~SEPROM_DATA; + SET_SEPROM; + tonga &= ~SEPROM_CLK; + SET_SEPROM; + /* send address */ + address = ((i+SEPROM_ESI_BASE) << 1)+1; + for (j = 7; j >= 0; j--) { + tonga = (address >> j) & 1 ? tonga | SEPROM_DATA : + tonga & ~SEPROM_DATA; + SET_SEPROM; + tonga |= SEPROM_CLK; + SET_SEPROM; + tonga &= ~SEPROM_CLK; + SET_SEPROM; + } + /* get ack */ + tonga |= SEPROM_DATA; + SET_SEPROM; + tonga |= SEPROM_CLK; + SET_SEPROM; + GET_SEPROM; + failed = tonga & SEPROM_DATA; + tonga &= ~SEPROM_CLK; + SET_SEPROM; + tonga |= SEPROM_DATA; + SET_SEPROM; + if (failed) error = -EIO; + else { + dev->esi[i] = 0; + for (j = 7; j >= 0; j--) { + dev->esi[i] <<= 1; + tonga |= SEPROM_DATA; + SET_SEPROM; + tonga |= SEPROM_CLK; + SET_SEPROM; + GET_SEPROM; + if (tonga & SEPROM_DATA) dev->esi[i] |= 1; + tonga &= ~SEPROM_CLK; + SET_SEPROM; + tonga |= SEPROM_DATA; + SET_SEPROM; + } + /* get ack */ + tonga |= SEPROM_DATA; + SET_SEPROM; + tonga |= SEPROM_CLK; + SET_SEPROM; + GET_SEPROM; + if (!(tonga & SEPROM_DATA)) error = -EIO; + tonga &= ~SEPROM_CLK; + SET_SEPROM; + tonga |= SEPROM_DATA; + SET_SEPROM; + } + /* stop operation */ + tonga &= ~SEPROM_DATA; + SET_SEPROM; + tonga |= SEPROM_CLK; + SET_SEPROM; + tonga |= SEPROM_DATA; + SET_SEPROM; + } + if (pci_error) { + printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI " + "(0x%02x)\n",dev->number,pci_error); + error = -EIO; + } + return error; +} + + +#undef SET_SEPROM +#undef GET_SEPROM + + +static int get_esi_fpga(struct atm_dev *dev, void __iomem *base) +{ + void __iomem *mac_base; + int i; + + mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom); + for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3)); + return 0; +} + + +static int eni_do_init(struct atm_dev *dev) +{ + struct midway_eprom __iomem *eprom; + struct eni_dev *eni_dev; + struct pci_dev *pci_dev; + unsigned long real_base; + void __iomem *base; + int error,i,last; + + DPRINTK(">eni_init\n"); + dev->ci_range.vpi_bits = 0; + dev->ci_range.vci_bits = NR_VCI_LD; + dev->link_rate = ATM_OC3_PCR; + eni_dev = ENI_DEV(dev); + pci_dev = eni_dev->pci_dev; + real_base = pci_resource_start(pci_dev, 0); + eni_dev->irq = pci_dev->irq; + if ((error = pci_write_config_word(pci_dev,PCI_COMMAND, + PCI_COMMAND_MEMORY | + (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) { + printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory " + "(0x%02x)\n",dev->number,error); + return -EIO; + } + printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,", + dev->number,pci_dev->revision,real_base,eni_dev->irq); + if (!(base = ioremap(real_base,MAP_MAX_SIZE))) { + printk("\n"); + printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page " + "mapping\n",dev->number); + return -ENOMEM; + } + eni_dev->ioaddr = base; + eni_dev->base_diff = real_base - (unsigned long) base; + /* id may not be present in ASIC Tonga boards - check this @@@ */ + if (!eni_dev->asic) { + eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom)); + if (readl(&eprom->magic) != ENI155_MAGIC) { + printk("\n"); + printk(KERN_ERR DEV_LABEL + "(itf %d): bad magic - expected 0x%x, got 0x%x\n", + dev->number, ENI155_MAGIC, + (unsigned)readl(&eprom->magic)); + error = -EINVAL; + goto unmap; + } + } + eni_dev->phy = base+PHY_BASE; + eni_dev->reg = base+REG_BASE; + eni_dev->ram = base+RAM_BASE; + last = MAP_MAX_SIZE-RAM_BASE; + for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) { + writel(0x55555555,eni_dev->ram+i); + if (readl(eni_dev->ram+i) != 0x55555555) last = i; + else { + writel(0xAAAAAAAA,eni_dev->ram+i); + if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i; + else writel(i,eni_dev->ram+i); + } + } + for (i = 0; i < last; i += RAM_INCREMENT) + if (readl(eni_dev->ram+i) != i) break; + eni_dev->mem = i; + memset_io(eni_dev->ram,0,eni_dev->mem); + /* TODO: should shrink allocation now */ + printk("mem=%dkB (",eni_dev->mem >> 10); + /* TODO: check for non-SUNI, check for TAXI ? */ + if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) { + printk(")\n"); + printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n", + dev->number,(unsigned) eni_in(MID_RES_ID_MCON)); + error = -EINVAL; + goto unmap; + } + error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base); + if (error) + goto unmap; + for (i = 0; i < ESI_LEN; i++) + printk("%s%02X",i ? "-" : "",dev->esi[i]); + printk(")\n"); + printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number, + eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA", + media_name[eni_in(MID_RES_ID_MCON) & DAUGHTER_ID]); + + error = suni_init(dev); + if (error) + goto unmap; +out: + return error; +unmap: + iounmap(base); + goto out; +} + +static void eni_do_release(struct atm_dev *dev) +{ + struct eni_dev *ed = ENI_DEV(dev); + + dev->phy->stop(dev); + dev->phy = NULL; + iounmap(ed->ioaddr); +} + +static int eni_start(struct atm_dev *dev) +{ + struct eni_dev *eni_dev; + + void __iomem *buf; + unsigned long buffer_mem; + int error; + + DPRINTK(">eni_start\n"); + eni_dev = ENI_DEV(dev); + if (request_irq(eni_dev->irq,&eni_int,IRQF_SHARED,DEV_LABEL,dev)) { + printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n", + dev->number,eni_dev->irq); + error = -EAGAIN; + goto out; + } + pci_set_master(eni_dev->pci_dev); + if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND, + PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | + (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) { + printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+" + "master (0x%02x)\n",dev->number,error); + goto free_irq; + } + if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL, + END_SWAP_DMA))) { + printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap " + "(0x%02x)\n",dev->number,error); + goto free_irq; + } + /* determine addresses of internal tables */ + eni_dev->vci = eni_dev->ram; + eni_dev->rx_dma = eni_dev->ram+NR_VCI*16; + eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8; + eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8; + buf = eni_dev->service+NR_SERVICE*4; + DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n", + eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma, + eni_dev->service,buf); + spin_lock_init(&eni_dev->lock); + tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev); + eni_dev->events = 0; + /* initialize memory management */ + buffer_mem = eni_dev->mem - (buf - eni_dev->ram); + eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2; + eni_dev->free_list = kmalloc_array(eni_dev->free_list_size + 1, + sizeof(*eni_dev->free_list), + GFP_KERNEL); + if (!eni_dev->free_list) { + printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n", + dev->number); + error = -ENOMEM; + goto free_irq; + } + eni_dev->free_len = 0; + eni_put_free(eni_dev,buf,buffer_mem); + memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */ + /* + * byte_addr free (k) + * 0x00000000 512 VCI table + * 0x00004000 496 RX DMA + * 0x00005000 492 TX DMA + * 0x00006000 488 service list + * 0x00007000 484 buffers + * 0x00080000 0 end (512kB) + */ + eni_out(0xffffffff,MID_IE); + error = start_tx(dev); + if (error) goto free_list; + error = start_rx(dev); + if (error) goto free_list; + error = dev->phy->start(dev); + if (error) goto free_list; + eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) | + MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE, + MID_MC_S); + /* Tonga uses SBus INTReq1 */ + (void) eni_in(MID_ISA); /* clear Midway interrupts */ + return 0; + +free_list: + kfree(eni_dev->free_list); + +free_irq: + free_irq(eni_dev->irq, dev); + +out: + return error; +} + + +static void eni_close(struct atm_vcc *vcc) +{ + DPRINTK(">eni_close\n"); + if (!ENI_VCC(vcc)) return; + clear_bit(ATM_VF_READY,&vcc->flags); + close_rx(vcc); + close_tx(vcc); + DPRINTK("eni_close: done waiting\n"); + /* deallocate memory */ + kfree(ENI_VCC(vcc)); + vcc->dev_data = NULL; + clear_bit(ATM_VF_ADDR,&vcc->flags); + /*foo();*/ +} + + +static int eni_open(struct atm_vcc *vcc) +{ + struct eni_vcc *eni_vcc; + int error; + short vpi = vcc->vpi; + int vci = vcc->vci; + + DPRINTK(">eni_open\n"); + EVENT("eni_open\n",0,0); + if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) + vcc->dev_data = NULL; + if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC) + set_bit(ATM_VF_ADDR,&vcc->flags); + if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5) + return -EINVAL; + DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi, + vcc->vci); + if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) { + eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL); + if (!eni_vcc) return -ENOMEM; + vcc->dev_data = eni_vcc; + eni_vcc->tx = NULL; /* for eni_close after open_rx */ + if ((error = open_rx_first(vcc))) { + eni_close(vcc); + return error; + } + if ((error = open_tx_first(vcc))) { + eni_close(vcc); + return error; + } + } + if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0; + if ((error = open_rx_second(vcc))) { + eni_close(vcc); + return error; + } + if ((error = open_tx_second(vcc))) { + eni_close(vcc); + return error; + } + set_bit(ATM_VF_READY,&vcc->flags); + /* should power down SUNI while !ref_count @@@ */ + return 0; +} + + +static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs) +{ + struct eni_dev *eni_dev = ENI_DEV(vcc->dev); + struct eni_tx *tx = ENI_VCC(vcc)->tx; + struct sk_buff *skb; + int error,rate,rsv,shp; + + if (qos->txtp.traffic_class == ATM_NONE) return 0; + if (tx == eni_dev->ubr) return -EBADFD; + rate = atm_pcr_goal(&qos->txtp); + if (rate < 0) rate = -rate; + rsv = shp = 0; + if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1; + if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1; + if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1; + if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1; + if (!rsv && !shp) return 0; + error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp); + if (error) return error; + if (shp && !(flgs & ATM_MF_IMMED)) return 0; + /* + * Walk through the send buffer and patch the rate information in all + * segmentation buffer descriptors of this VCC. + */ + tasklet_disable(&eni_dev->task); + skb_queue_walk(&eni_dev->tx_queue, skb) { + void __iomem *dsc; + + if (ATM_SKB(skb)->vcc != vcc) continue; + dsc = tx->send+ENI_PRV_POS(skb)*4; + writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) | + (tx->prescaler << MID_SEG_PR_SHIFT) | + (tx->resolution << MID_SEG_RATE_SHIFT), dsc); + } + tasklet_enable(&eni_dev->task); + return 0; +} + + +static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg) +{ + struct eni_dev *eni_dev = ENI_DEV(dev); + + if (cmd == ENI_MEMDUMP) { + if (!capable(CAP_NET_ADMIN)) return -EPERM; + printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d " + "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number); + dump(dev); + return 0; + } + if (cmd == ENI_SETMULT) { + struct eni_multipliers mult; + + if (!capable(CAP_NET_ADMIN)) return -EPERM; + if (copy_from_user(&mult, arg, + sizeof(struct eni_multipliers))) + return -EFAULT; + if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) || + mult.tx > 65536 || mult.rx > 65536) + return -EINVAL; + if (mult.tx) eni_dev->tx_mult = mult.tx; + if (mult.rx) eni_dev->rx_mult = mult.rx; + return 0; + } + if (cmd == ATM_SETCIRANGE) { + struct atm_cirange ci; + + if (copy_from_user(&ci, arg,sizeof(struct atm_cirange))) + return -EFAULT; + if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) && + (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX)) + return 0; + return -EINVAL; + } + if (!dev->phy->ioctl) return -ENOIOCTLCMD; + return dev->phy->ioctl(dev,cmd,arg); +} + +static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb) +{ + enum enq_res res; + + DPRINTK(">eni_send\n"); + if (!ENI_VCC(vcc)->tx) { + if (vcc->pop) vcc->pop(vcc,skb); + else dev_kfree_skb(skb); + return -EINVAL; + } + if (!skb) { + printk(KERN_CRIT "!skb in eni_send ?\n"); + if (vcc->pop) vcc->pop(vcc,skb); + return -EINVAL; + } + if (vcc->qos.aal == ATM_AAL0) { + if (skb->len != ATM_CELL_SIZE-1) { + if (vcc->pop) vcc->pop(vcc,skb); + else dev_kfree_skb(skb); + return -EINVAL; + } + *(u32 *) skb->data = htonl(*(u32 *) skb->data); + } + submitted++; + ATM_SKB(skb)->vcc = vcc; + tasklet_disable_in_atomic(&ENI_DEV(vcc->dev)->task); + res = do_tx(skb); + tasklet_enable(&ENI_DEV(vcc->dev)->task); + if (res == enq_ok) return 0; + skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb); + backlogged++; + tasklet_schedule(&ENI_DEV(vcc->dev)->task); + return 0; +} + +static void eni_phy_put(struct atm_dev *dev,unsigned char value, + unsigned long addr) +{ + writel(value,ENI_DEV(dev)->phy+addr*4); +} + + + +static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr) +{ + return readl(ENI_DEV(dev)->phy+addr*4); +} + + +static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page) +{ + struct sock *s; + static const char *signal[] = { "LOST","unknown","okay" }; + struct eni_dev *eni_dev = ENI_DEV(dev); + struct atm_vcc *vcc; + int left,i; + + left = *pos; + if (!left) + return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, " + "%d cps remaining\n",dev->number,signal[(int) dev->signal], + eni_dev->mem >> 10,eni_dev->tx_bw); + if (!--left) + return sprintf(page,"%4sBursts: TX" +#if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \ + !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \ + !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \ + !defined(CONFIG_ATM_ENI_BURST_TX_2W) + " none" +#endif +#ifdef CONFIG_ATM_ENI_BURST_TX_16W + " 16W" +#endif +#ifdef CONFIG_ATM_ENI_BURST_TX_8W + " 8W" +#endif +#ifdef CONFIG_ATM_ENI_BURST_TX_4W + " 4W" +#endif +#ifdef CONFIG_ATM_ENI_BURST_TX_2W + " 2W" +#endif + ", RX" +#if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \ + !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \ + !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \ + !defined(CONFIG_ATM_ENI_BURST_RX_2W) + " none" +#endif +#ifdef CONFIG_ATM_ENI_BURST_RX_16W + " 16W" +#endif +#ifdef CONFIG_ATM_ENI_BURST_RX_8W + " 8W" +#endif +#ifdef CONFIG_ATM_ENI_BURST_RX_4W + " 4W" +#endif +#ifdef CONFIG_ATM_ENI_BURST_RX_2W + " 2W" +#endif +#ifndef CONFIG_ATM_ENI_TUNE_BURST + " (default)" +#endif + "\n",""); + if (!--left) + return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n", + "",eni_dev->tx_mult,eni_dev->rx_mult); + for (i = 0; i < NR_CHAN; i++) { + struct eni_tx *tx = eni_dev->tx+i; + + if (!tx->send) continue; + if (!--left) { + return sprintf(page, "tx[%d]: 0x%lx-0x%lx " + "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i, + (unsigned long) (tx->send - eni_dev->ram), + tx->send-eni_dev->ram+tx->words*4-1,tx->words*4, + tx->reserved,tx->shaping, + tx == eni_dev->ubr ? " (UBR)" : ""); + } + if (--left) continue; + return sprintf(page,"%10sbacklog %u packets\n","", + skb_queue_len(&tx->backlog)); + } + read_lock(&vcc_sklist_lock); + for(i = 0; i < VCC_HTABLE_SIZE; ++i) { + struct hlist_head *head = &vcc_hash[i]; + + sk_for_each(s, head) { + struct eni_vcc *eni_vcc; + int length; + + vcc = atm_sk(s); + if (vcc->dev != dev) + continue; + eni_vcc = ENI_VCC(vcc); + if (--left) continue; + length = sprintf(page,"vcc %4d: ",vcc->vci); + if (eni_vcc->rx) { + length += sprintf(page+length, "0x%lx-0x%lx " + "(%6ld bytes)", + (unsigned long) (eni_vcc->recv - eni_dev->ram), + eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1, + eni_vcc->words*4); + if (eni_vcc->tx) length += sprintf(page+length,", "); + } + if (eni_vcc->tx) + length += sprintf(page+length,"tx[%d], txing %d bytes", + eni_vcc->tx->index,eni_vcc->txing); + page[length] = '\n'; + read_unlock(&vcc_sklist_lock); + return length+1; + } + } + read_unlock(&vcc_sklist_lock); + for (i = 0; i < eni_dev->free_len; i++) { + struct eni_free *fe = eni_dev->free_list+i; + unsigned long offset; + + if (--left) continue; + offset = (unsigned long) eni_dev->ram+eni_dev->base_diff; + return sprintf(page,"free %p-%p (%6d bytes)\n", + fe->start-offset,fe->start-offset+(1 << fe->order)-1, + 1 << fe->order); + } + return 0; +} + + +static const struct atmdev_ops ops = { + .open = eni_open, + .close = eni_close, + .ioctl = eni_ioctl, + .send = eni_send, + .phy_put = eni_phy_put, + .phy_get = eni_phy_get, + .change_qos = eni_change_qos, + .proc_read = eni_proc_read +}; + + +static int eni_init_one(struct pci_dev *pci_dev, + const struct pci_device_id *ent) +{ + struct atm_dev *dev; + struct eni_dev *eni_dev; + struct eni_zero *zero; + int rc; + + rc = pci_enable_device(pci_dev); + if (rc < 0) + goto out; + + rc = dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(32)); + if (rc < 0) + goto err_disable; + + rc = -ENOMEM; + eni_dev = kmalloc(sizeof(struct eni_dev), GFP_KERNEL); + if (!eni_dev) + goto err_disable; + + zero = &eni_dev->zero; + zero->addr = dma_alloc_coherent(&pci_dev->dev, + ENI_ZEROES_SIZE, &zero->dma, GFP_KERNEL); + if (!zero->addr) + goto err_kfree; + + dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL); + if (!dev) + goto err_free_consistent; + + dev->dev_data = eni_dev; + pci_set_drvdata(pci_dev, dev); + eni_dev->pci_dev = pci_dev; + eni_dev->asic = ent->driver_data; + + rc = eni_do_init(dev); + if (rc < 0) + goto err_unregister; + + rc = eni_start(dev); + if (rc < 0) + goto err_eni_release; + + eni_dev->more = eni_boards; + eni_boards = dev; +out: + return rc; + +err_eni_release: + dev->phy = NULL; + iounmap(ENI_DEV(dev)->ioaddr); +err_unregister: + atm_dev_deregister(dev); +err_free_consistent: + dma_free_coherent(&pci_dev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma); +err_kfree: + kfree(eni_dev); +err_disable: + pci_disable_device(pci_dev); + goto out; +} + + +static const struct pci_device_id eni_pci_tbl[] = { + { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_FPGA), 0 /* FPGA */ }, + { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_ASIC), 1 /* ASIC */ }, + { 0, } +}; +MODULE_DEVICE_TABLE(pci,eni_pci_tbl); + + +static void eni_remove_one(struct pci_dev *pdev) +{ + struct atm_dev *dev = pci_get_drvdata(pdev); + struct eni_dev *ed = ENI_DEV(dev); + struct eni_zero *zero = &ed->zero; + + eni_do_release(dev); + atm_dev_deregister(dev); + dma_free_coherent(&pdev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma); + kfree(ed); + pci_disable_device(pdev); +} + + +static struct pci_driver eni_driver = { + .name = DEV_LABEL, + .id_table = eni_pci_tbl, + .probe = eni_init_one, + .remove = eni_remove_one, +}; + + +static int __init eni_init(void) +{ + struct sk_buff *skb; /* dummy for sizeof */ + + BUILD_BUG_ON(sizeof(skb->cb) < sizeof(struct eni_skb_prv)); + return pci_register_driver(&eni_driver); +} + + +module_init(eni_init); +/* @@@ since exit routine not defined, this module can not be unloaded */ + +MODULE_LICENSE("GPL"); |