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- // 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"
- #if !defined(__i386__) && !defined(__x86_64__)
- #ifndef ioremap_nocache
- #define ioremap_nocache(X,Y) ioremap(X,Y)
- #endif
- #endif
- /*
- * TODO:
- *
- * Show stoppers
- * none
- *
- * Minor
- * - OAM support
- * - fix bugs listed below
- */
- /*
- * KNOWN BUGS:
- *
- * - may run into JK-JK bug and deadlock
- * - should allocate UBR channel first
- * - buffer space allocation algorithm is stupid
- * (RX: should be maxSDU+maxdelay*rate
- * TX: should be maxSDU+min(maxSDU,maxdelay*rate) )
- * - doesn't support OAM cells
- * - eni_put_free may hang if not putting memory fragments that _complete_
- * 2^n block (never happens in real life, though)
- */
- #if 0
- #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
- #else
- #define DPRINTK(format,args...)
- #endif
- #ifndef CONFIG_ATM_ENI_TUNE_BURST
- #define CONFIG_ATM_ENI_BURST_TX_8W
- #define CONFIG_ATM_ENI_BURST_RX_4W
- #endif
- #ifndef CONFIG_ATM_ENI_DEBUG
- #define NULLCHECK(x)
- #define EVENT(s,a,b)
- static void event_dump(void)
- {
- }
- #else
- /*
- * NULL pointer checking
- */
- #define NULLCHECK(x) \
- if ((unsigned long) (x) < 0x30) \
- printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x))
- /*
- * Very extensive activity logging. Greatly improves bug detection speed but
- * costs a few Mbps if enabled.
- */
- #define EV 64
- static const char *ev[EV];
- static unsigned long ev_a[EV],ev_b[EV];
- static int ec = 0;
- static void EVENT(const char *s,unsigned long a,unsigned long b)
- {
- ev[ec] = s;
- ev_a[ec] = a;
- ev_b[ec] = b;
- ec = (ec+1) % EV;
- }
- static void event_dump(void)
- {
- int n,i;
- for (n = 0; n < EV; n++) {
- i = (ec+n) % EV;
- printk(KERN_NOTICE);
- printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]);
- }
- }
- #endif /* CONFIG_ATM_ENI_DEBUG */
- /*
- * NExx must not be equal at end
- * EExx may be equal at end
- * xxPJOK verify validity of pointer jumps
- * xxPMOK operating on a circular buffer of "c" words
- */
- #define NEPJOK(a0,a1,b) \
- ((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1))
- #define EEPJOK(a0,a1,b) \
- ((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1))
- #define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b)
- #define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b)
- static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0,
- backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0,
- putting = 0;
- static struct atm_dev *eni_boards = NULL;
- /* Read/write registers on card */
- #define eni_in(r) readl(eni_dev->reg+(r)*4)
- #define eni_out(v,r) writel((v),eni_dev->reg+(r)*4)
- /*-------------------------------- utilities --------------------------------*/
- static void dump_mem(struct eni_dev *eni_dev)
- {
- int i;
- for (i = 0; i < eni_dev->free_len; i++)
- printk(KERN_DEBUG " %d: %p %d\n",i,
- eni_dev->free_list[i].start,
- 1 << eni_dev->free_list[i].order);
- }
- static void dump(struct atm_dev *dev)
- {
- struct eni_dev *eni_dev;
- int i;
- eni_dev = ENI_DEV(dev);
- printk(KERN_NOTICE "Free memory\n");
- dump_mem(eni_dev);
- printk(KERN_NOTICE "TX buffers\n");
- for (i = 0; i < NR_CHAN; i++)
- if (eni_dev->tx[i].send)
- printk(KERN_NOTICE " TX %d @ %p: %ld\n",i,
- eni_dev->tx[i].send,eni_dev->tx[i].words*4);
- printk(KERN_NOTICE "RX buffers\n");
- for (i = 0; i < 1024; i++)
- if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx)
- printk(KERN_NOTICE " RX %d @ %p: %ld\n",i,
- ENI_VCC(eni_dev->rx_map[i])->recv,
- ENI_VCC(eni_dev->rx_map[i])->words*4);
- printk(KERN_NOTICE "----\n");
- }
- static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start,
- unsigned long size)
- {
- struct eni_free *list;
- int len,order;
- DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size);
- start += eni_dev->base_diff;
- list = eni_dev->free_list;
- len = eni_dev->free_len;
- while (size) {
- if (len >= eni_dev->free_list_size) {
- printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n",
- start,size);
- break;
- }
- for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++);
- if (MID_MIN_BUF_SIZE > (1 << order)) {
- printk(KERN_CRIT "eni_put_free: order %d too small\n",
- order);
- break;
- }
- list[len].start = (void __iomem *) start;
- list[len].order = order;
- len++;
- start += 1 << order;
- size -= 1 << order;
- }
- eni_dev->free_len = len;
- /*dump_mem(eni_dev);*/
- }
- static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size)
- {
- struct eni_free *list;
- void __iomem *start;
- int len,i,order,best_order,index;
- list = eni_dev->free_list;
- len = eni_dev->free_len;
- if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE;
- if (*size > MID_MAX_BUF_SIZE) return NULL;
- for (order = 0; (1 << order) < *size; order++)
- ;
- DPRINTK("trying: %ld->%d\n",*size,order);
- best_order = 65; /* we don't have more than 2^64 of anything ... */
- index = 0; /* silence GCC */
- for (i = 0; i < len; i++)
- if (list[i].order == order) {
- best_order = order;
- index = i;
- break;
- }
- else if (best_order > list[i].order && list[i].order > order) {
- best_order = list[i].order;
- index = i;
- }
- if (best_order == 65) return NULL;
- start = list[index].start-eni_dev->base_diff;
- list[index] = list[--len];
- eni_dev->free_len = len;
- *size = 1 << order;
- eni_put_free(eni_dev,start+*size,(1 << best_order)-*size);
- DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start);
- memset_io(start,0,*size); /* never leak data */
- /*dump_mem(eni_dev);*/
- return start;
- }
- static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start,
- unsigned long size)
- {
- struct eni_free *list;
- int len,i,order;
- start += eni_dev->base_diff;
- list = eni_dev->free_list;
- len = eni_dev->free_len;
- for (order = -1; size; order++) size >>= 1;
- DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order);
- for (i = 0; i < len; i++)
- if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) &&
- list[i].order == order) {
- DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i,
- list[i].start,start,1 << order,list[i].order,order);
- list[i] = list[--len];
- start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order));
- order++;
- i = -1;
- continue;
- }
- if (len >= eni_dev->free_list_size) {
- printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start,
- order);
- return;
- }
- list[len].start = start;
- list[len].order = order;
- eni_dev->free_len = len+1;
- /*dump_mem(eni_dev);*/
- }
- /*----------------------------------- RX ------------------------------------*/
- #define ENI_VCC_NOS ((struct atm_vcc *) 1)
- static void rx_ident_err(struct atm_vcc *vcc)
- {
- struct atm_dev *dev;
- struct eni_dev *eni_dev;
- struct eni_vcc *eni_vcc;
- dev = vcc->dev;
- eni_dev = ENI_DEV(dev);
- /* immediately halt adapter */
- eni_out(eni_in(MID_MC_S) &
- ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S);
- /* dump useful information */
- eni_vcc = ENI_VCC(vcc);
- printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident "
- "mismatch\n",dev->number);
- printk(KERN_ALERT " VCI %d, rxing %d, words %ld\n",vcc->vci,
- eni_vcc->rxing,eni_vcc->words);
- printk(KERN_ALERT " host descr 0x%lx, rx pos 0x%lx, descr value "
- "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos,
- (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4));
- printk(KERN_ALERT " last %p, servicing %d\n",eni_vcc->last,
- eni_vcc->servicing);
- EVENT("---dump ends here---\n",0,0);
- printk(KERN_NOTICE "---recent events---\n");
- event_dump();
- ENI_DEV(dev)->fast = NULL; /* really stop it */
- ENI_DEV(dev)->slow = NULL;
- skb_queue_head_init(&ENI_DEV(dev)->rx_queue);
- }
- static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb,
- unsigned long skip,unsigned long size,unsigned long eff)
- {
- struct eni_dev *eni_dev;
- struct eni_vcc *eni_vcc;
- u32 dma_rd,dma_wr;
- u32 dma[RX_DMA_BUF*2];
- dma_addr_t paddr;
- unsigned long here;
- int i,j;
- eni_dev = ENI_DEV(vcc->dev);
- eni_vcc = ENI_VCC(vcc);
- paddr = 0; /* GCC, shut up */
- if (skb) {
- paddr = 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;
- 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 = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len,
- DMA_TO_DEVICE);
- 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->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);
- 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_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 -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_getsockopt(struct atm_vcc *vcc,int level,int optname,
- void __user *optval,int optlen)
- {
- return -EINVAL;
- }
- static int eni_setsockopt(struct atm_vcc *vcc,int level,int optname,
- void __user *optval,unsigned int optlen)
- {
- return -EINVAL;
- }
- static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb)
- {
- enum enq_res res;
- DPRINTK(">eni_send\n");
- if (!ENI_VCC(vcc)->tx) {
- if (vcc->pop) vcc->pop(vcc,skb);
- else dev_kfree_skb(skb);
- return -EINVAL;
- }
- if (!skb) {
- printk(KERN_CRIT "!skb in eni_send ?\n");
- if (vcc->pop) vcc->pop(vcc,skb);
- return -EINVAL;
- }
- if (vcc->qos.aal == ATM_AAL0) {
- if (skb->len != ATM_CELL_SIZE-1) {
- if (vcc->pop) vcc->pop(vcc,skb);
- else dev_kfree_skb(skb);
- return -EINVAL;
- }
- *(u32 *) skb->data = htonl(*(u32 *) skb->data);
- }
- submitted++;
- ATM_SKB(skb)->vcc = vcc;
- tasklet_disable(&ENI_DEV(vcc->dev)->task);
- res = do_tx(skb);
- tasklet_enable(&ENI_DEV(vcc->dev)->task);
- if (res == enq_ok) return 0;
- skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb);
- backlogged++;
- tasklet_schedule(&ENI_DEV(vcc->dev)->task);
- return 0;
- }
- static void eni_phy_put(struct atm_dev *dev,unsigned char value,
- unsigned long addr)
- {
- writel(value,ENI_DEV(dev)->phy+addr*4);
- }
- static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr)
- {
- return readl(ENI_DEV(dev)->phy+addr*4);
- }
- static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page)
- {
- struct 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,
- .getsockopt = eni_getsockopt,
- .setsockopt = eni_setsockopt,
- .send = eni_send,
- .phy_put = eni_phy_put,
- .phy_get = eni_phy_get,
- .change_qos = eni_change_qos,
- .proc_read = eni_proc_read
- };
- static int 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");
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