litmus-rt-ext-res.git - LITMUS^RT with extended reservations for Forbidden Zones paper @ RTAS'20

diff options

-rw-r--r--

1 files changed, 2 insertions, 2 deletions


diff --git a/arch/x86/crypto/sha512-mb/sha512_mb.c b/arch/x86/crypto/sha512-mb/sha512_mb.c index f4cf5b78fd36..d210174a52b0 100644 --- a/arch/x86/crypto/sha512-mb/sha512_mb.c +++ b/arch/x86/crypto/sha512-mb/sha512_mb.c
@@ -497,10 +497,10 @@ static int sha_complete_job(struct mcryptd_hash_request_ctx *rctx,
497		497
498	req = cast_mcryptd_ctx_to_req(req_ctx);	498	req = cast_mcryptd_ctx_to_req(req_ctx);
499	if (irqs_disabled())	499	if (irqs_disabled())
500	rctx->complete(&req->base, ret);	500	req_ctx->complete(&req->base, ret);
501	else {	501	else {
502	local_bh_disable();	502	local_bh_disable();
503	rctx->complete(&req->base, ret);	503	req_ctx->complete(&req->base, ret);
504	local_bh_enable();	504	local_bh_enable();
505	}	505	}
506	}	506	}

/* 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 <asm/system.h> #include <asm/io.h> #include <asm/atomic.h> #include <asm/uaccess.h> #include <asm/string.h> #include <asm/byteorder.h> #include "tonga.h" #include "midway.h" #include "suni.h" #include "eni.h" #if !defined(__i386__) && !defined(__x86_64__) #ifndef ioremap_nocache #define ioremap_nocache(X,Y) ioremap(X,Y) #endif #endif /* * TODO: * * Show stoppers * none * * Minor * - OAM support * - fix bugs listed below */ /* * KNOWN BUGS: * * - may run into JK-JK bug and deadlock * - should allocate UBR channel first * - buffer space allocation algorithm is stupid * (RX: should be maxSDU+maxdelay*rate * TX: should be maxSDU+min(maxSDU,maxdelay*rate) ) * - doesn't support OAM cells * - eni_put_free may hang if not putting memory fragments that _complete_ * 2^n block (never happens in real life, though) */ #if 0 #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args) #else #define DPRINTK(format,args...) #endif #ifndef CONFIG_ATM_ENI_TUNE_BURST #define CONFIG_ATM_ENI_BURST_TX_8W #define CONFIG_ATM_ENI_BURST_RX_4W #endif #ifndef CONFIG_ATM_ENI_DEBUG #define NULLCHECK(x) #define EVENT(s,a,b) static void event_dump(void) { } #else /* * NULL pointer checking */ #define NULLCHECK(x) \ if ((unsigned long) (x) < 0x30) \ printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x)) /* * Very extensive activity logging. Greatly improves bug detection speed but * costs a few Mbps if enabled. */ #define EV 64 static const char *ev[EV]; static unsigned long ev_a[EV],ev_b[EV]; static int ec = 0; static void EVENT(const char *s,unsigned long a,unsigned long b) { ev[ec] = s; ev_a[ec] = a; ev_b[ec] = b; ec = (ec+1) % EV; } static void event_dump(void) { int n,i; for (n = 0; n < EV; n++) { i = (ec+n) % EV; printk(KERN_NOTICE); printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]); } } #endif /* CONFIG_ATM_ENI_DEBUG */ /* * NExx must not be equal at end * EExx may be equal at end * xxPJOK verify validity of pointer jumps * xxPMOK operating on a circular buffer of "c" words */ #define NEPJOK(a0,a1,b) \ ((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1)) #define EEPJOK(a0,a1,b) \ ((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1)) #define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b) #define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b) static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0, backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0, putting = 0; static struct atm_dev *eni_boards = NULL; static u32 *cpu_zeroes = NULL; /* aligned "magic" zeroes */ static dma_addr_t zeroes; /* Read/write registers on card */ #define eni_in(r) readl(eni_dev->reg+(r)*4) #define eni_out(v,r) writel((v),eni_dev->reg+(r)*4) /*-------------------------------- utilities --------------------------------*/ static void dump_mem(struct eni_dev *eni_dev) { int i; for (i = 0; i < eni_dev->free_len; i++) printk(KERN_DEBUG " %d: %p %d\n",i, eni_dev->free_list[i].start, 1 << eni_dev->free_list[i].order); } static void dump(struct atm_dev *dev) { struct eni_dev *eni_dev; int i; eni_dev = ENI_DEV(dev); printk(KERN_NOTICE "Free memory\n"); dump_mem(eni_dev); printk(KERN_NOTICE "TX buffers\n"); for (i = 0; i < NR_CHAN; i++) if (eni_dev->tx[i].send) printk(KERN_NOTICE " TX %d @ %p: %ld\n",i, eni_dev->tx[i].send,eni_dev->tx[i].words*4); printk(KERN_NOTICE "RX buffers\n"); for (i = 0; i < 1024; i++) if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx) printk(KERN_NOTICE " RX %d @ %p: %ld\n",i, ENI_VCC(eni_dev->rx_map[i])->recv, ENI_VCC(eni_dev->rx_map[i])->words*4); printk(KERN_NOTICE "----\n"); } static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start, unsigned long size) { struct eni_free *list; int len,order; DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size); start += eni_dev->base_diff; list = eni_dev->free_list; len = eni_dev->free_len; while (size) { if (len >= eni_dev->free_list_size) { printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n", start,size); break; } for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++); if (MID_MIN_BUF_SIZE > (1 << order)) { printk(KERN_CRIT "eni_put_free: order %d too small\n", order); break; } list[len].start = (void __iomem *) start; list[len].order = order; len++; start += 1 << order; size -= 1 << order; } eni_dev->free_len = len; /*dump_mem(eni_dev);*/ } static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size) { struct eni_free *list; void __iomem *start; int len,i,order,best_order,index; list = eni_dev->free_list; len = eni_dev->free_len; if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE; if (*size > MID_MAX_BUF_SIZE) return NULL; for (order = 0; (1 << order) < *size; order++); DPRINTK("trying: %ld->%d\n",*size,order); best_order = 65; /* we don't have more than 2^64 of anything ... */ index = 0; /* silence GCC */ for (i = 0; i < len; i++) if (list[i].order == order) { best_order = order; index = i; break; } else if (best_order > list[i].order && list[i].order > order) { best_order = list[i].order; index = i; } if (best_order == 65) return NULL; start = list[index].start-eni_dev->base_diff; list[index] = list[--len]; eni_dev->free_len = len; *size = 1 << order; eni_put_free(eni_dev,start+*size,(1 << best_order)-*size); DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start); memset_io(start,0,*size); /* never leak data */ /*dump_mem(eni_dev);*/ return start; } static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start, unsigned long size) { struct eni_free *list; int len,i,order; start += eni_dev->base_diff; list = eni_dev->free_list; len = eni_dev->free_len; for (order = -1; size; order++) size >>= 1; DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order); for (i = 0; i < len; i++) if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) && list[i].order == order) { DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i, list[i].start,start,1 << order,list[i].order,order); list[i] = list[--len]; start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order)); order++; i = -1; continue; } if (len >= eni_dev->free_list_size) { printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start, order); return; } list[len].start = start; list[len].order = order; eni_dev->free_len = len+1; /*dump_mem(eni_dev);*/ } /*----------------------------------- RX ------------------------------------*/ #define ENI_VCC_NOS ((struct atm_vcc *) 1) static void rx_ident_err(struct atm_vcc *vcc) { struct atm_dev *dev; struct eni_dev *eni_dev; struct eni_vcc *eni_vcc; dev = vcc->dev; eni_dev = ENI_DEV(dev); /* immediately halt adapter */ eni_out(eni_in(MID_MC_S) & ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S); /* dump useful information */ eni_vcc = ENI_VCC(vcc); printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident " "mismatch\n",dev->number); printk(KERN_ALERT " VCI %d, rxing %d, words %ld\n",vcc->vci, eni_vcc->rxing,eni_vcc->words); printk(KERN_ALERT " host descr 0x%lx, rx pos 0x%lx, descr value " "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos, (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4)); printk(KERN_ALERT " last %p, servicing %d\n",eni_vcc->last, eni_vcc->servicing); EVENT("---dump ends here---\n",0,0); printk(KERN_NOTICE "---recent events---\n"); event_dump(); ENI_DEV(dev)->fast = NULL; /* really stop it */ ENI_DEV(dev)->slow = NULL; skb_queue_head_init(&ENI_DEV(dev)->rx_queue); } static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb, unsigned long skip,unsigned long size,unsigned long eff) { struct eni_dev *eni_dev; struct eni_vcc *eni_vcc; u32 dma_rd,dma_wr; u32 dma[RX_DMA_BUF*2]; dma_addr_t paddr; unsigned long here; int i,j; eni_dev = ENI_DEV(vcc->dev); eni_vcc = ENI_VCC(vcc); paddr = 0; /* GCC, shut up */ if (skb) { paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len, PCI_DMA_FROMDEVICE); ENI_PRV_PADDR(skb) = paddr; if (paddr & 3) printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has " "mis-aligned RX data (0x%lx)\n",vcc->dev->number, vcc->vci,(unsigned long) paddr); ENI_PRV_SIZE(skb) = size+skip; /* PDU plus descriptor */ ATM_SKB(skb)->vcc = vcc; } j = 0; if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */ here = (eni_vcc->descr+skip) & (eni_vcc->words-1); dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK; j++; } here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1); if (!eff) size += skip; else { unsigned long words; if (!size) { DPRINTK("strange things happen ...\n"); EVENT("strange things happen ... (skip=%ld,eff=%ld)\n", size,eff); } words = eff; if (paddr & 15) { unsigned long init; init = 4-((paddr & 15) >> 2); if (init > words) init = words; dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) | (vcc->vci << MID_DMA_VCI_SHIFT); dma[j++] = paddr; paddr += init << 2; words -= init; } #ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */ if (words & ~15) { dma[j++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT) | (vcc->vci << MID_DMA_VCI_SHIFT); dma[j++] = paddr; paddr += (words & ~15) << 2; words &= 15; } #endif #ifdef CONFIG_ATM_ENI_BURST_RX_8W /* works only with *some* PCI chipsets ... */ if (words & ~7) { dma[j++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT) | (vcc->vci << MID_DMA_VCI_SHIFT); dma[j++] = paddr; paddr += (words & ~7) << 2; words &= 7; } #endif #ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */ if (words & ~3) { dma[j++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT) | (vcc->vci << MID_DMA_VCI_SHIFT); dma[j++] = paddr; paddr += (words & ~3) << 2; words &= 3; } #endif #ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */ if (words & ~1) { dma[j++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT) | (vcc->vci << MID_DMA_VCI_SHIFT); dma[j++] = paddr; paddr += (words & ~1) << 2; words &= 1; } #endif if (words) { dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) | (vcc->vci << MID_DMA_VCI_SHIFT); dma[j++] = paddr; } } if (size != eff) { dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK; j++; } if (!j || j > 2*RX_DMA_BUF) { printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n"); goto trouble; } dma[j-2] |= MID_DMA_END; j = j >> 1; dma_wr = eni_in(MID_DMA_WR_RX); dma_rd = eni_in(MID_DMA_RD_RX); /* * Can I move the dma_wr pointer by 2j+1 positions without overwriting * data that hasn't been read (position of dma_rd) yet ? */ if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */ printk(KERN_WARNING DEV_LABEL "(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) pci_unmap_single(eni_dev->pci_dev,paddr,skb->len, PCI_DMA_FROMDEVICE); 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); pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len, PCI_DMA_TODEVICE); if (!skb->len) dev_kfree_skb_irq(skb); else { EVENT("pushing (len=%ld)\n",skb->len,0); if (vcc->qos.aal == ATM_AAL0) *(unsigned long *) skb->data = ntohl(*(unsigned long *) skb->data); memset(skb->cb,0,sizeof(struct eni_skb_prv)); vcc->push(vcc,skb); pushed++; } atomic_inc(&vcc->stats->rx); } wake_up(&eni_dev->rx_wait); } static int open_rx_first(struct atm_vcc *vcc) { struct eni_dev *eni_dev; struct eni_vcc *eni_vcc; unsigned long size; DPRINTK("open_rx_first\n"); eni_dev = ENI_DEV(vcc->dev); eni_vcc = ENI_VCC(vcc); eni_vcc->rx = NULL; if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0; size = vcc->qos.rxtp.max_sdu*eni_dev->rx_mult/100; if (size > MID_MAX_BUF_SIZE && vcc->qos.rxtp.max_sdu <= MID_MAX_BUF_SIZE) size = MID_MAX_BUF_SIZE; eni_vcc->recv = eni_alloc_mem(eni_dev,&size); DPRINTK("rx at 0x%lx\n",eni_vcc->recv); eni_vcc->words = size >> 2; if (!eni_vcc->recv) return -ENOBUFS; eni_vcc->rx = vcc->qos.aal == ATM_AAL5 ? rx_aal5 : rx_aal0; eni_vcc->descr = 0; eni_vcc->rx_pos = 0; eni_vcc->rxing = 0; eni_vcc->servicing = 0; eni_vcc->next = ENI_VCC_NOS; return 0; } static int open_rx_second(struct atm_vcc *vcc) { void __iomem *here; struct eni_dev *eni_dev; struct eni_vcc *eni_vcc; unsigned long size; int order; DPRINTK("open_rx_second\n"); eni_dev = ENI_DEV(vcc->dev); eni_vcc = ENI_VCC(vcc); if (!eni_vcc->rx) return 0; /* set up VCI descriptor */ here = eni_dev->vci+vcc->vci*16; DPRINTK("loc 0x%x\n",(unsigned) (eni_vcc->recv-eni_dev->ram)/4); size = eni_vcc->words >> 8; for (order = -1; size; order++) size >>= 1; writel(0,here+4); /* descr, read = 0 */ writel(0,here+8); /* write, state, count = 0 */ if (eni_dev->rx_map[vcc->vci]) printk(KERN_CRIT DEV_LABEL "(itf %d): BUG - VCI %d already " "in use\n",vcc->dev->number,vcc->vci); eni_dev->rx_map[vcc->vci] = vcc; /* now it counts */ writel(((vcc->qos.aal != ATM_AAL5 ? MID_MODE_RAW : MID_MODE_AAL5) << MID_VCI_MODE_SHIFT) | MID_VCI_PTI_MODE | (((eni_vcc->recv-eni_dev->ram) >> (MID_LOC_SKIP+2)) << MID_VCI_LOCATION_SHIFT) | (order << MID_VCI_SIZE_SHIFT),here); return 0; } static void close_rx(struct atm_vcc *vcc) { DECLARE_WAITQUEUE(wait,current); void __iomem *here; struct eni_dev *eni_dev; struct eni_vcc *eni_vcc; eni_vcc = ENI_VCC(vcc); if (!eni_vcc->rx) return; eni_dev = ENI_DEV(vcc->dev); if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) { here = eni_dev->vci+vcc->vci*16; /* block receiver */ writel((readl(here) & ~MID_VCI_MODE) | (MID_MODE_TRASH << MID_VCI_MODE_SHIFT),here); /* wait for receiver to become idle */ udelay(27); /* discard pending cell */ writel(readl(here) & ~MID_VCI_IN_SERVICE,here); /* don't accept any new ones */ eni_dev->rx_map[vcc->vci] = NULL; /* wait for RX queue to drain */ DPRINTK("eni_close: waiting for RX ...\n"); EVENT("RX closing\n",0,0); add_wait_queue(&eni_dev->rx_wait,&wait); set_current_state(TASK_UNINTERRUPTIBLE); barrier(); for (;;) { /* transition service->rx: rxing++, servicing-- */ if (!eni_vcc->servicing) { barrier(); if (!eni_vcc->rxing) break; } EVENT("drain PDUs (rx %ld, serv %ld)\n",eni_vcc->rxing, eni_vcc->servicing); printk(KERN_INFO "%d+%d RX left\n",eni_vcc->servicing, eni_vcc->rxing); schedule(); set_current_state(TASK_UNINTERRUPTIBLE); } for (;;) { int at_end; u32 tmp; tasklet_disable(&eni_dev->task); tmp = readl(eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ; at_end = eni_vcc->rx_pos == tmp >> MID_VCI_READ_SHIFT; tasklet_enable(&eni_dev->task); if (at_end) break; EVENT("drain discard (host 0x%lx, nic 0x%lx)\n", eni_vcc->rx_pos,tmp); printk(KERN_INFO "draining RX: host 0x%lx, nic 0x%x\n", eni_vcc->rx_pos,tmp); schedule(); set_current_state(TASK_UNINTERRUPTIBLE); } set_current_state(TASK_RUNNING); remove_wait_queue(&eni_dev->rx_wait,&wait); } eni_free_mem(eni_dev,eni_vcc->recv,eni_vcc->words << 2); eni_vcc->rx = NULL; } static int start_rx(struct atm_dev *dev) { struct eni_dev *eni_dev; eni_dev = ENI_DEV(dev); eni_dev->rx_map = (struct atm_vcc **) get_zeroed_page(GFP_KERNEL); if (!eni_dev->rx_map) { printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n", dev->number); free_page((unsigned long) eni_dev->free_list); return -ENOMEM; } eni_dev->rx_mult = DEFAULT_RX_MULT; eni_dev->fast = eni_dev->last_fast = NULL; eni_dev->slow = eni_dev->last_slow = NULL; init_waitqueue_head(&eni_dev->rx_wait); skb_queue_head_init(&eni_dev->rx_queue); eni_dev->serv_read = eni_in(MID_SERV_WRITE); eni_out(0,MID_DMA_WR_RX); return 0; } /*----------------------------------- TX ------------------------------------*/ enum enq_res { enq_ok,enq_next,enq_jam }; static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr, u32 size) { u32 init,words; DPRINTK("put_dma: 0x%lx+0x%x\n",(unsigned long) paddr,size); EVENT("put_dma: 0x%lx+0x%lx\n",(unsigned long) paddr,size); #if 0 /* don't complain anymore */ if (paddr & 3) printk(KERN_ERR "put_dma: unaligned addr (0x%lx)\n",paddr); if (size & 3) printk(KERN_ERR "put_dma: unaligned size (0x%lx)\n",size); #endif if (paddr & 3) { init = 4-(paddr & 3); if (init > size || size < 7) init = size; DPRINTK("put_dma: %lx DMA: %d/%d bytes\n", (unsigned long) paddr,init,size); dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) | (chan << MID_DMA_CHAN_SHIFT); dma[(*j)++] = paddr; paddr += init; size -= init; } words = size >> 2; size &= 3; if (words && (paddr & 31)) { init = 8-((paddr & 31) >> 2); if (init > words) init = words; DPRINTK("put_dma: %lx DMA: %d/%d words\n", (unsigned long) paddr,init,words); dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) | (chan << MID_DMA_CHAN_SHIFT); dma[(*j)++] = paddr; paddr += init << 2; words -= init; } #ifdef CONFIG_ATM_ENI_BURST_TX_16W /* may work with some PCI chipsets ... */ if (words & ~15) { DPRINTK("put_dma: %lx DMA: %d*16/%d words\n", (unsigned long) paddr,words >> 4,words); dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT) | (chan << MID_DMA_CHAN_SHIFT); dma[(*j)++] = paddr; paddr += (words & ~15) << 2; words &= 15; } #endif #ifdef CONFIG_ATM_ENI_BURST_TX_8W /* recommended */ if (words & ~7) { DPRINTK("put_dma: %lx DMA: %d*8/%d words\n", (unsigned long) paddr,words >> 3,words); dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT) | (chan << MID_DMA_CHAN_SHIFT); dma[(*j)++] = paddr; paddr += (words & ~7) << 2; words &= 7; } #endif #ifdef CONFIG_ATM_ENI_BURST_TX_4W /* probably useless if TX_8W or TX_16W */ if (words & ~3) { DPRINTK("put_dma: %lx DMA: %d*4/%d words\n", (unsigned long) paddr,words >> 2,words); dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT) | (chan << MID_DMA_CHAN_SHIFT); dma[(*j)++] = paddr; paddr += (words & ~3) << 2; words &= 3; } #endif #ifdef CONFIG_ATM_ENI_BURST_TX_2W /* probably useless if TX_4W, TX_8W, ... */ if (words & ~1) { DPRINTK("put_dma: %lx DMA: %d*2/%d words\n", (unsigned long) paddr,words >> 1,words); dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT) | (chan << MID_DMA_CHAN_SHIFT); dma[(*j)++] = paddr; paddr += (words & ~1) << 2; words &= 1; } #endif if (words) { DPRINTK("put_dma: %lx DMA: %d words\n",(unsigned long) paddr, words); dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) | (chan << MID_DMA_CHAN_SHIFT); dma[(*j)++] = paddr; paddr += words << 2; } if (size) { DPRINTK("put_dma: %lx DMA: %d bytes\n",(unsigned long) paddr, size); dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) | (chan << MID_DMA_CHAN_SHIFT); dma[(*j)++] = paddr; } } static enum enq_res do_tx(struct sk_buff *skb) { struct atm_vcc *vcc; struct eni_dev *eni_dev; struct eni_vcc *eni_vcc; struct eni_tx *tx; dma_addr_t paddr; u32 dma_rd,dma_wr; u32 size; /* in words */ int aal5,dma_size,i,j; DPRINTK(">do_tx\n"); NULLCHECK(skb); EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,skb->len); vcc = ATM_SKB(skb)->vcc; NULLCHECK(vcc); eni_dev = ENI_DEV(vcc->dev); NULLCHECK(eni_dev); eni_vcc = ENI_VCC(vcc); tx = eni_vcc->tx; NULLCHECK(tx); #if 0 /* Enable this for testing with the "align" program */ { unsigned int hack = *((char *) skb->data)-'0'; if (hack < 8) { skb->data += hack; skb->len -= hack; } } #endif #if 0 /* should work now */ if ((unsigned long) skb->data & 3) printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned " "TX data\n",vcc->dev->number,vcc->vci); #endif /* * Potential future IP speedup: make hard_header big enough to put * segmentation descriptor directly into PDU. Saves: 4 slave writes, * 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-) */ aal5 = vcc->qos.aal == ATM_AAL5; /* check space in buffer */ if (!aal5) size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE; /* cell without HEC plus segmentation header (includes four-byte cell header) */ else { size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1; /* add AAL5 trailer */ size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE; /* add segmentation header */ } /* * Can I move tx_pos by size bytes without getting closer than TX_GAP * to the read pointer ? TX_GAP means to leave some space for what * the manual calls "too close". */ if (!NEPMOK(tx->tx_pos,size+TX_GAP, eni_in(MID_TX_RDPTR(tx->index)),tx->words)) { DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n", vcc->dev->number,size); return enq_next; } /* check DMA */ dma_wr = eni_in(MID_DMA_WR_TX); dma_rd = eni_in(MID_DMA_RD_TX); dma_size = 3; /* JK for descriptor and final fill, plus final size mis-alignment fix */ DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags); if (!skb_shinfo(skb)->nr_frags) dma_size += 5; else dma_size += 5*(skb_shinfo(skb)->nr_frags+1); if (dma_size > TX_DMA_BUF) { printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries " "(got only %d)\n",vcc->dev->number,dma_size,TX_DMA_BUF); } DPRINTK("dma_wr is %d, tx_pos is %ld\n",dma_wr,tx->tx_pos); if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) < dma_size) { printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n", vcc->dev->number); return enq_jam; } paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len, PCI_DMA_TODEVICE); ENI_PRV_PADDR(skb) = paddr; /* prepare DMA queue entries */ j = 0; eni_dev->dma[j++] = (((tx->tx_pos+TX_DESCR_SIZE) & (tx->words-1)) << MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) | MID_DT_JK; j++; if (!skb_shinfo(skb)->nr_frags) if (aal5) put_dma(tx->index,eni_dev->dma,&j,paddr,skb->len); else put_dma(tx->index,eni_dev->dma,&j,paddr+4,skb->len-4); else { DPRINTK("doing direct send\n"); /* @@@ well, this doesn't work anyway */ for (i = -1; i < skb_shinfo(skb)->nr_frags; i++) if (i == -1) put_dma(tx->index,eni_dev->dma,&j,(unsigned long) skb->data, skb->len - skb->data_len); else put_dma(tx->index,eni_dev->dma,&j,(unsigned long) skb_shinfo(skb)->frags[i].page + skb_shinfo(skb)->frags[i].page_offset, skb_shinfo(skb)->frags[i].size); } if (skb->len & 3) put_dma(tx->index,eni_dev->dma,&j,zeroes,4-(skb->len & 3)); /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */ eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) << MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) | MID_DMA_END | MID_DT_JK; j++; DPRINTK("DMA at end: %d\n",j); /* store frame */ writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) | (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) | (tx->resolution << MID_SEG_RATE_SHIFT) | (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4); /*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/ writel((vcc->vci << MID_SEG_VCI_SHIFT) | (aal5 ? 0 : (skb->data[3] & 0xf)) | (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0), tx->send+((tx->tx_pos+1) & (tx->words-1))*4); DPRINTK("size: %d, len:%d\n",size,skb->len); if (aal5) writel(skb->len,tx->send+ ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4); j = j >> 1; for (i = 0; i < j; i++) { writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8); writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4); dma_wr = (dma_wr+1) & (NR_DMA_TX-1); } ENI_PRV_POS(skb) = tx->tx_pos; ENI_PRV_SIZE(skb) = size; ENI_VCC(vcc)->txing += size; tx->tx_pos = (tx->tx_pos+size) & (tx->words-1); DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos); eni_out(dma_wr,MID_DMA_WR_TX); skb_queue_tail(&eni_dev->tx_queue,skb); queued++; return enq_ok; } static void poll_tx(struct atm_dev *dev) { struct eni_tx *tx; struct sk_buff *skb; enum enq_res res; int i; DPRINTK(">poll_tx\n"); for (i = NR_CHAN-1; i >= 0; i--) { tx = &ENI_DEV(dev)->tx[i]; if (tx->send) while ((skb = skb_dequeue(&tx->backlog))) { res = do_tx(skb); if (res == enq_ok) continue; DPRINTK("re-queuing TX PDU\n"); skb_queue_head(&tx->backlog,skb); requeued++; if (res == enq_jam) return; break; } } } static void dequeue_tx(struct atm_dev *dev) { struct eni_dev *eni_dev; struct atm_vcc *vcc; struct sk_buff *skb; struct eni_tx *tx; NULLCHECK(dev); eni_dev = ENI_DEV(dev); NULLCHECK(eni_dev); while ((skb = skb_dequeue(&eni_dev->tx_queue))) { vcc = ATM_SKB(skb)->vcc; NULLCHECK(vcc); tx = ENI_VCC(vcc)->tx; NULLCHECK(ENI_VCC(vcc)->tx); DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb), (unsigned) eni_in(MID_TX_DESCRSTART(tx->index))); if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) == eni_in(MID_TX_DESCRSTART(tx->index))) { skb_queue_head(&eni_dev->tx_queue,skb); break; } ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb); pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len, PCI_DMA_TODEVICE); if (vcc->pop) vcc->pop(vcc,skb); else dev_kfree_skb_irq(skb); atomic_inc(&vcc->stats->tx); wake_up(&eni_dev->tx_wait); dma_complete++; } } static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr) { int i; for (i = !ubr; i < NR_CHAN; i++) if (!eni_dev->tx[i].send) return eni_dev->tx+i; return NULL; } static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre, int *res,int unlimited) { static const int pre_div[] = { 4,16,128,2048 }; /* 2^(((x+2)^2-(x+2))/2+1) */ if (unlimited) *pre = *res = 0; else { if (*pcr > 0) { int div; for (*pre = 0; *pre < 3; (*pre)++) if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break; div = pre_div[*pre]**pcr; DPRINTK("min div %d\n",div); *res = TS_CLOCK/div-1; } else { int div; if (!*pcr) *pcr = eni_dev->tx_bw+reserved; for (*pre = 3; *pre >= 0; (*pre)--) if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break; if (*pre < 3) (*pre)++; /* else fail later */ div = pre_div[*pre]*-*pcr; DPRINTK("max div %d\n",div); *res = (TS_CLOCK+div-1)/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) { struct eni_dev *eni_dev; DPRINTK(">bug_int\n"); eni_dev = ENI_DEV(dev); 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 const char *media_name[] __devinitdata = { "MMF", "SMF", "MMF", "03?", /* 0- 3 */ "UTP", "05?", "06?", "07?", /* 4- 7 */ "TAXI","09?", "10?", "11?", /* 8-11 */ "12?", "13?", "14?", "15?", /* 12-15 */ "MMF", "SMF", "18?", "19?", /* 16-19 */ "UTP", "21?", "22?", "23?", /* 20-23 */ "24?", "25?", "26?", "27?", /* 24-27 */ "28?", "29?", "30?", "31?" /* 28-31 */ }; #define SET_SEPROM \ ({ if (!error && !pci_error) { \ pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \ udelay(10); /* 10 usecs */ \ } }) #define GET_SEPROM \ ({ if (!error && !pci_error) { \ pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \ udelay(10); /* 10 usecs */ \ } }) static int __devinit get_esi_asic(struct atm_dev *dev) { struct eni_dev *eni_dev; unsigned char tonga; int error,failed,pci_error; int address,i,j; eni_dev = ENI_DEV(dev); error = pci_error = 0; tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK; SET_SEPROM; for (i = 0; i < ESI_LEN && !error && !pci_error; i++) { /* start operation */ tonga |= SEPROM_DATA; SET_SEPROM; tonga |= SEPROM_CLK; SET_SEPROM; tonga &= ~SEPROM_DATA; SET_SEPROM; tonga &= ~SEPROM_CLK; SET_SEPROM; /* send address */ address = ((i+SEPROM_ESI_BASE) << 1)+1; for (j = 7; j >= 0; j--) { tonga = (address >> j) & 1 ? tonga | SEPROM_DATA : tonga & ~SEPROM_DATA; SET_SEPROM; tonga |= SEPROM_CLK; SET_SEPROM; tonga &= ~SEPROM_CLK; SET_SEPROM; } /* get ack */ tonga |= SEPROM_DATA; SET_SEPROM; tonga |= SEPROM_CLK; SET_SEPROM; GET_SEPROM; failed = tonga & SEPROM_DATA; tonga &= ~SEPROM_CLK; SET_SEPROM; tonga |= SEPROM_DATA; SET_SEPROM; if (failed) error = -EIO; else { dev->esi[i] = 0; for (j = 7; j >= 0; j--) { dev->esi[i] <<= 1; tonga |= SEPROM_DATA; SET_SEPROM; tonga |= SEPROM_CLK; SET_SEPROM; GET_SEPROM; if (tonga & SEPROM_DATA) dev->esi[i] |= 1; tonga &= ~SEPROM_CLK; SET_SEPROM; tonga |= SEPROM_DATA; SET_SEPROM; } /* get ack */ tonga |= SEPROM_DATA; SET_SEPROM; tonga |= SEPROM_CLK; SET_SEPROM; GET_SEPROM; if (!(tonga & SEPROM_DATA)) error = -EIO; tonga &= ~SEPROM_CLK; SET_SEPROM; tonga |= SEPROM_DATA; SET_SEPROM; } /* stop operation */ tonga &= ~SEPROM_DATA; SET_SEPROM; tonga |= SEPROM_CLK; SET_SEPROM; tonga |= SEPROM_DATA; SET_SEPROM; } if (pci_error) { printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI " "(0x%02x)\n",dev->number,pci_error); error = -EIO; } return error; } #undef SET_SEPROM #undef GET_SEPROM static int __devinit get_esi_fpga(struct atm_dev *dev, void __iomem *base) { void __iomem *mac_base; int i; mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom); for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3)); return 0; } static int __devinit eni_do_init(struct atm_dev *dev) { struct midway_eprom __iomem *eprom; struct eni_dev *eni_dev; struct pci_dev *pci_dev; unsigned long real_base; void __iomem *base; int error,i,last; DPRINTK(">eni_init\n"); dev->ci_range.vpi_bits = 0; dev->ci_range.vci_bits = NR_VCI_LD; dev->link_rate = ATM_OC3_PCR; eni_dev = ENI_DEV(dev); pci_dev = eni_dev->pci_dev; real_base = pci_resource_start(pci_dev, 0); eni_dev->irq = pci_dev->irq; if ((error = pci_write_config_word(pci_dev,PCI_COMMAND, PCI_COMMAND_MEMORY | (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) { printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory " "(0x%02x)\n",dev->number,error); return -EIO; } printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,", dev->number,pci_dev->revision,real_base,eni_dev->irq); if (!(base = ioremap_nocache(real_base,MAP_MAX_SIZE))) { printk("\n"); printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page " "mapping\n",dev->number); return error; } eni_dev->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 KERN_ERR DEV_LABEL "(itf %d): bad " "magic - expected 0x%x, got 0x%x\n",dev->number, ENI155_MAGIC,(unsigned) readl(&eprom->magic)); error = -EINVAL; goto unmap; } } eni_dev->phy = base+PHY_BASE; eni_dev->reg = base+REG_BASE; eni_dev->ram = base+RAM_BASE; last = MAP_MAX_SIZE-RAM_BASE; for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) { writel(0x55555555,eni_dev->ram+i); if (readl(eni_dev->ram+i) != 0x55555555) last = i; else { writel(0xAAAAAAAA,eni_dev->ram+i); if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i; else writel(i,eni_dev->ram+i); } } for (i = 0; i < last; i += RAM_INCREMENT) if (readl(eni_dev->ram+i) != i) break; eni_dev->mem = i; memset_io(eni_dev->ram,0,eni_dev->mem); /* TODO: should shrink allocation now */ printk("mem=%dkB (",eni_dev->mem >> 10); /* TODO: check for non-SUNI, check for TAXI ? */ if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) { printk(")\n"); printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n", dev->number,(unsigned) eni_in(MID_RES_ID_MCON)); error = -EINVAL; goto unmap; } error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base); if (error) goto unmap; for (i = 0; i < ESI_LEN; i++) printk("%s%02X",i ? "-" : "",dev->esi[i]); printk(")\n"); printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number, eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA", media_name[eni_in(MID_RES_ID_MCON) & DAUGTHER_ID]); error = suni_init(dev); if (error) goto unmap; out: return error; unmap: iounmap(base); goto out; } static int __devinit eni_start(struct atm_dev *dev) { struct eni_dev *eni_dev; void __iomem *buf; unsigned long buffer_mem; int error; DPRINTK(">eni_start\n"); eni_dev = ENI_DEV(dev); if (request_irq(eni_dev->irq,&eni_int,IRQF_SHARED,DEV_LABEL,dev)) { printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n", dev->number,eni_dev->irq); error = -EAGAIN; goto out; } pci_set_master(eni_dev->pci_dev); if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND, PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) { printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+" "master (0x%02x)\n",dev->number,error); goto free_irq; } if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL, END_SWAP_DMA))) { printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap " "(0x%02x)\n",dev->number,error); goto free_irq; } /* determine addresses of internal tables */ eni_dev->vci = eni_dev->ram; eni_dev->rx_dma = eni_dev->ram+NR_VCI*16; eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8; eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8; buf = eni_dev->service+NR_SERVICE*4; DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n", eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma, eni_dev->service,buf); spin_lock_init(&eni_dev->lock); tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev); eni_dev->events = 0; /* initialize memory management */ buffer_mem = eni_dev->mem - (buf - eni_dev->ram); eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2; eni_dev->free_list = kmalloc( sizeof(struct eni_free)*(eni_dev->free_list_size+1),GFP_KERNEL); if (!eni_dev->free_list) { printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n", dev->number); error = -ENOMEM; goto free_irq; } eni_dev->free_len = 0; eni_put_free(eni_dev,buf,buffer_mem); memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */ /* * byte_addr free (k) * 0x00000000 512 VCI table * 0x00004000 496 RX DMA * 0x00005000 492 TX DMA * 0x00006000 488 service list * 0x00007000 484 buffers * 0x00080000 0 end (512kB) */ eni_out(0xffffffff,MID_IE); error = start_tx(dev); if (error) goto free_list; error = start_rx(dev); if (error) goto free_list; error = dev->phy->start(dev); if (error) goto free_list; eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) | MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE, MID_MC_S); /* Tonga uses SBus INTReq1 */ (void) eni_in(MID_ISA); /* clear Midway interrupts */ return 0; free_list: kfree(eni_dev->free_list); free_irq: free_irq(eni_dev->irq, eni_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_dev *eni_dev; 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; eni_dev = ENI_DEV(vcc->dev); 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);


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