patch-2.3.15 linux/drivers/atm/eni.c
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- Lines: 2265
- Date:
Mon Aug 23 09:56:31 1999
- Orig file:
v2.3.14/linux/drivers/atm/eni.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.3.14/linux/drivers/atm/eni.c linux/drivers/atm/eni.c
@@ -0,0 +1,2264 @@
+/* drivers/atm/eni.c - Efficient Networks ENI155P device driver */
+
+/* Written 1995-1999 by Werner Almesberger, EPFL LRC/ICA */
+
+
+#include <linux/module.h>
+#include <linux/config.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/sched.h> /* for xtime */
+#include <linux/delay.h>
+#include <linux/uio.h>
+#include <linux/init.h>
+#include <linux/atm_eni.h>
+#include <asm/system.h>
+#include <asm/io.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"
+
+#ifndef __i386__
+#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)
+ * - keeps IRQ even if initialization fails
+ */
+
+
+#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 *zeroes = NULL; /* aligned "magic" 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: 0x%lx %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 @ 0x%lx: %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 @ 0x%lx: %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,unsigned long 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 (0x%lx,%ld)\n",
+ start,size);
+ break;
+ }
+ for (order = 0; !((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 = start;
+ list[len].order = order;
+ len++;
+ start += 1 << order;
+ size -= 1 << order;
+ }
+ eni_dev->free_len = len;
+ /*dump_mem(eni_dev);*/
+}
+
+
+static unsigned long eni_alloc_mem(struct eni_dev *eni_dev,unsigned long *size)
+{
+ struct eni_free *list;
+ unsigned long 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 0;
+ 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 0;
+ 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,unsigned long 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: 0x%lx+0x%lx (order %d)\n",start,size,order);
+ for (i = 0; i < len; i++)
+ if (list[i].start == (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 &= ~(unsigned long) (1 << order);
+ order++;
+ i = -1;
+ continue;
+ }
+ if (len >= eni_dev->free_list_size) {
+ printk(KERN_ALERT "eni_free_mem overflow (0x%lx,%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 0x%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];
+ unsigned long paddr,here;
+ int i,j;
+
+ eni_dev = ENI_DEV(vcc->dev);
+ eni_vcc = ENI_VCC(vcc);
+ paddr = 0; /* GCC, shut up */
+ if (skb) {
+ paddr = (unsigned long) skb->data;
+ 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,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++] = virt_to_bus((void *) 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++] = virt_to_bus((void *) 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++] = virt_to_bus((void *) 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++] = virt_to_bus((void *) 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++] = virt_to_bus((void *) 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++] = virt_to_bus((void *) 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");
+ if (skb) kfree_skb(skb);
+ return -1;
+ }
+ 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);
+ if (skb) kfree_skb(skb);
+ return -1;
+ }
+ 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;
+}
+
+
+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;
+ vcc->stats->rx_err++;
+ }
+ else {
+ length = ATM_CELL_SIZE-1; /* no HEC */
+ }
+ if (!length || !atm_charge(vcc,atm_pdu2truesize(length))) skb = NULL;
+ else {
+ skb = alloc_skb(length,GFP_ATOMIC);
+ if (!skb) atm_return(vcc,atm_pdu2truesize(length));
+ }
+ if (!skb) {
+ discard(vcc,length >> 2);
+ return 0;
+ }
+ skb_put(skb,length);
+ skb->stamp = 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;
+ 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;
+ vcc->stats->rx_err++;
+ }
+ }
+ if (!eff || !atm_charge(vcc,atm_pdu2truesize(eff << 2))) skb = NULL;
+ else {
+ skb = alloc_skb(eff << 2,GFP_ATOMIC);
+ if (!skb) {
+ EVENT("peek reject (eff << 2=%ld)\n",eff << 2,0);
+ DPRINTK(DEV_LABEL "(itf %d): peek reject for %ld "
+ "bytes\n",vcc->dev->number,eff << 2);
+ atm_return(vcc,atm_pdu2truesize(eff << 2));
+ }
+ }
+ 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)
+{
+ unsigned long vci_dsc,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;
+ 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;
+ 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 = xtime;
+ 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;
+ unsigned long 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);
+ if (!skb->len) kfree_skb(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++;
+ }
+ 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*3; /* @@@ improve this */
+ 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)
+{
+ unsigned long 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)
+{
+ unsigned long here,flags;
+ struct eni_dev *eni_dev;
+ struct eni_vcc *eni_vcc;
+ u32 tmp;
+
+ 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);
+ save_flags(flags);
+ cli();
+ while (eni_vcc->rxing || eni_vcc->servicing) {
+ 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);
+ sleep_on(&eni_dev->rx_wait);
+ }
+ while (eni_vcc->rx_pos != (tmp =
+ readl(eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ)>>
+ MID_VCI_READ_SHIFT) {
+ 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);
+ sleep_on(&eni_dev->rx_wait);
+ }
+ restore_flags(flags);
+ }
+ 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_free_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;
+ }
+ memset(eni_dev->rx_map,0,PAGE_SIZE);
+ 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,unsigned long paddr,
+ u32 size)
+{
+ u32 init,words;
+
+ DPRINTK("put_dma: 0x%lx+0x%x\n",paddr,size);
+ EVENT("put_dma: 0x%lx+0x%lx\n",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",paddr,init,size);
+ dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) |
+ (chan << MID_DMA_CHAN_SHIFT);
+ dma[(*j)++] = virt_to_bus((void *) 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",paddr,init,words);
+ dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
+ (chan << MID_DMA_CHAN_SHIFT);
+ dma[(*j)++] = virt_to_bus((void *) 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",paddr,words >> 4,
+ words);
+ dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT)
+ | (chan << MID_DMA_CHAN_SHIFT);
+ dma[(*j)++] = virt_to_bus((void *) 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",paddr,words >> 3,
+ words);
+ dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT)
+ | (chan << MID_DMA_CHAN_SHIFT);
+ dma[(*j)++] = virt_to_bus((void *) 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",paddr,words >> 2,
+ words);
+ dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT)
+ | (chan << MID_DMA_CHAN_SHIFT);
+ dma[(*j)++] = virt_to_bus((void *) 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",paddr,words >> 1,
+ words);
+ dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT)
+ | (chan << MID_DMA_CHAN_SHIFT);
+ dma[(*j)++] = virt_to_bus((void *) paddr);
+ paddr += (words & ~1) << 2;
+ words &= 1;
+ }
+#endif
+ if (words) {
+ DPRINTK("put_dma: %lx DMA: %d words\n",paddr,words);
+ dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) |
+ (chan << MID_DMA_CHAN_SHIFT);
+ dma[(*j)++] = virt_to_bus((void *) paddr);
+ paddr += words << 2;
+ }
+ if (size) {
+ DPRINTK("put_dma: %lx DMA: %d bytes\n",paddr,size);
+ dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) |
+ (chan << MID_DMA_CHAN_SHIFT);
+ dma[(*j)++] = virt_to_bus((void *) 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;
+ 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 :-)
+ */
+
+ /* check space in buffer */
+ if (!(aal5 = vcc->qos.aal == ATM_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",ATM_SKB(skb)->iovcnt);
+ if (!ATM_SKB(skb)->iovcnt) dma_size += 5;
+ else dma_size += 5*ATM_SKB(skb)->iovcnt;
+ 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;
+ }
+ /* 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 (!ATM_SKB(skb)->iovcnt)
+ if (aal5)
+ put_dma(tx->index,eni_dev->dma,&j,
+ (unsigned long) skb->data,skb->len);
+ else put_dma(tx->index,eni_dev->dma,&j,
+ (unsigned long) skb->data+4,skb->len-4);
+ else {
+DPRINTK("doing direct send\n");
+ for (i = 0; i < ATM_SKB(skb)->iovcnt; i++)
+ put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
+ ((struct iovec *) skb->data)[i].iov_base,
+ ((struct iovec *) skb->data)[i].iov_len);
+ }
+ if (skb->len & 3)
+ put_dma(tx->index,eni_dev->dma,&j,
+ (unsigned long) 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) {
+ DPRINTK("re-queuing TX PDU\n");
+ skb_queue_head(&tx->backlog,skb);
+requeued++;
+ if (res == enq_jam) return;
+ else 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);
+ if (vcc->pop) vcc->pop(vcc,skb);
+ else dev_kfree_skb(skb);
+ 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,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*3; /* @@@ improve */
+ 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 = 0; /* 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 = 0;
+ 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)
+{
+ struct eni_dev *eni_dev;
+ struct eni_vcc *eni_vcc;
+ unsigned long flags;
+
+ 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");
+ save_flags(flags);
+ cli();
+ while (skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing) {
+ DPRINTK("%d TX left\n",eni_vcc->txing);
+ sleep_on(&eni_dev->tx_wait);
+ }
+ /*
+ * 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();
+ restore_flags(flags);
+#if 0
+ if (skb_peek(&eni_vcc->tx->backlog))
+ printk(KERN_CRIT DEV_LABEL "SKBs in BACKLOG !!!\n");
+#endif
+ if (eni_vcc->tx != eni_dev->ubr) {
+ eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2);
+ eni_vcc->tx->send = 0;
+ 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;
+ 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 = 0;
+ 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 misc_int(struct atm_dev *dev,unsigned long reason)
+{
+ struct eni_dev *eni_dev;
+
+ DPRINTK(">misc_int\n");
+ eni_dev = ENI_DEV(dev);
+ 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
+ }
+ if (reason & MID_DMA_ERR_ACK) {
+ printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
+ "error\n",dev->number);
+ EVENT("---dump ends here---\n",0,0);
+ printk(KERN_NOTICE "---recent events---\n");
+ event_dump();
+ }
+ if (reason & MID_TX_IDENT_MISM) {
+ printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident "
+ "mismatch\n",dev->number);
+ EVENT("---dump ends here---\n",0,0);
+ printk(KERN_NOTICE "---recent events---\n");
+ event_dump();
+ }
+ 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 void eni_int(int irq,void *dev_id,struct pt_regs *regs)
+{
+ struct atm_dev *dev;
+ struct eni_dev *eni_dev;
+ unsigned long reason;
+
+ DPRINTK(">eni_int\n");
+ dev = dev_id;
+ eni_dev = ENI_DEV(dev);
+ while ((reason = eni_in(MID_ISA))) {
+ DPRINTK(DEV_LABEL ": int 0x%lx\n",reason);
+ if (reason & 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 (reason & 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 (reason & MID_TX_DMA_COMPLETE) {
+ EVENT("INT: TX DMA COMPLETE\n",0,0);
+ dequeue_tx(dev);
+ }
+ if (reason & MID_TX_COMPLETE) {
+ EVENT("INT: TX COMPLETE\n",0,0);
+tx_complete++;
+ wake_up(&eni_dev->tx_wait);
+ poll_tx(dev);
+ /* poll_rx ? */
+ }
+ if (reason & (MID_STAT_OVFL | MID_SUNI_INT | MID_DMA_ERR_ACK |
+ MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) {
+ EVENT("misc interrupt\n",0,0);
+ misc_int(dev,reason);
+ }
+ }
+}
+
+
+/*--------------------------------- entries ---------------------------------*/
+
+
+static const char *media_name[] __initdata = {
+ "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 */ \
+ } })
+
+
+__initfunc(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
+
+
+__initfunc(static int get_esi_fpga(struct atm_dev *dev,unsigned long base))
+{
+ unsigned long 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;
+}
+
+
+__initfunc(static int eni_init(struct atm_dev *dev))
+{
+ struct midway_eprom *eprom;
+ struct eni_dev *eni_dev;
+ struct pci_dev *pci_dev;
+ unsigned int real_base,base;
+ unsigned char revision;
+ 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_dev->base_address[0] & MEM_VALID; /* strip flags */
+ eni_dev->irq = pci_dev->irq;
+ error = pci_read_config_byte(pci_dev,PCI_REVISION_ID,&revision);
+ if (error) {
+ printk(KERN_ERR DEV_LABEL "(itf %d): init error 0x%02x\n",
+ dev->number,error);
+ return -EINVAL;
+ }
+ 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 error;
+ }
+ printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%x,irq=%d,",
+ dev->number,revision,real_base,eni_dev->irq);
+ if (!(base = (unsigned long) 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-base;
+ /* id may not be present in ASIC Tonga boards - check this @@@ */
+ if (!eni_dev->asic) {
+ eprom = (struct midway_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));
+ return -EINVAL;
+ }
+ }
+ 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));
+ return -EINVAL;
+ }
+ error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base);
+ if (error) return error;
+ 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]);
+ return suni_init(dev);
+}
+
+
+__initfunc(static int eni_start(struct atm_dev *dev))
+{
+ struct eni_dev *eni_dev;
+ unsigned long buf,buffer_mem;
+ int error;
+
+ DPRINTK(">eni_start\n");
+ eni_dev = ENI_DEV(dev);
+ if (request_irq(eni_dev->irq,&eni_int,SA_SHIRQ,DEV_LABEL,dev)) {
+ printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n",
+ dev->number,eni_dev->irq);
+ return -EAGAIN;
+ }
+ /* @@@ should release IRQ on error */
+ 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);
+ return error;
+ }
+ 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);
+ return error;
+ }
+ /* 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);
+ /* 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 = (struct eni_free *) 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);
+ return -ENOMEM;
+ }
+ 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) return error;
+ error = start_rx(dev);
+ if (error) return error;
+ error = dev->phy->start(dev);
+ if (error) return error;
+ 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;
+}
+
+
+static void eni_close(struct atm_vcc *vcc)
+{
+ DPRINTK(">eni_close\n");
+ if (!ENI_VCC(vcc)) return;
+ vcc->flags &= ~ATM_VF_READY;
+ close_rx(vcc);
+ close_tx(vcc);
+ DPRINTK("eni_close: done waiting\n");
+ /* deallocate memory */
+ kfree(ENI_VCC(vcc));
+ ENI_VCC(vcc) = NULL;
+ vcc->flags &= ~ATM_VF_ADDR;
+ /*foo();*/
+}
+
+
+static int get_ci(struct atm_vcc *vcc,short *vpi,int *vci)
+{
+ struct atm_vcc *walk;
+
+ if (*vpi == ATM_VPI_ANY) *vpi = 0;
+ if (*vci == ATM_VCI_ANY) {
+ for (*vci = ATM_NOT_RSV_VCI; *vci < NR_VCI; (*vci)++) {
+ if (vcc->qos.rxtp.traffic_class != ATM_NONE &&
+ ENI_DEV(vcc->dev)->rx_map[*vci])
+ continue;
+ if (vcc->qos.txtp.traffic_class != ATM_NONE) {
+ for (walk = vcc->dev->vccs; walk;
+ walk = walk->next)
+ if ((walk->flags & ATM_VF_ADDR) &&
+ walk->vci == *vci &&
+ walk->qos.txtp.traffic_class !=
+ ATM_NONE)
+ break;
+ if (walk) continue;
+ }
+ break;
+ }
+ return *vci == NR_VCI ? -EADDRINUSE : 0;
+ }
+ if (*vci == ATM_VCI_UNSPEC) return 0;
+ if (vcc->qos.rxtp.traffic_class != ATM_NONE &&
+ ENI_DEV(vcc->dev)->rx_map[*vci])
+ return -EADDRINUSE;
+ if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0;
+ for (walk = vcc->dev->vccs; walk; walk = walk->next)
+ if ((walk->flags & ATM_VF_ADDR) && walk->vci == *vci &&
+ walk->qos.txtp.traffic_class != ATM_NONE)
+ return -EADDRINUSE;
+ return 0;
+}
+
+
+static int eni_open(struct atm_vcc *vcc,short vpi,int vci)
+{
+ struct eni_dev *eni_dev;
+ struct eni_vcc *eni_vcc;
+ int error;
+
+ DPRINTK(">eni_open\n");
+ EVENT("eni_open\n",0,0);
+ if (!(vcc->flags & ATM_VF_PARTIAL)) ENI_VCC(vcc) = NULL;
+ eni_dev = ENI_DEV(vcc->dev);
+ error = get_ci(vcc,&vpi,&vci);
+ if (error) return error;
+ vcc->vpi = vpi;
+ vcc->vci = vci;
+ if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
+ vcc->flags |= ATM_VF_ADDR;
+ 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 (!(vcc->flags & ATM_VF_PARTIAL)) {
+ eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL);
+ if (!eni_vcc) return -ENOMEM;
+ ENI_VCC(vcc) = 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;
+ }
+ vcc->flags |= ATM_VF_READY;
+ /* 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;
+ unsigned long flags;
+ 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.
+ */
+ save_flags(flags);
+ cli();
+ for (skb = eni_dev->tx_queue.next; skb !=
+ (struct sk_buff *) &eni_dev->tx_queue; skb = skb->next) {
+ unsigned long 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);
+ }
+ restore_flags(flags);
+ return 0;
+}
+
+
+static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void *arg)
+{
+ if (cmd == ENI_MEMDUMP) {
+ 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 == ATM_SETCIRANGE) {
+ struct atm_cirange ci;
+
+ if (copy_from_user(&ci,(void *) 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 -EINVAL;
+ return dev->phy->ioctl(dev,cmd,arg);
+}
+
+
+static int eni_getsockopt(struct atm_vcc *vcc,int level,int optname,
+ void *optval,int optlen)
+{
+#ifdef CONFIG_MMU_HACKS
+
+static const struct atm_buffconst bctx = { PAGE_SIZE,0,PAGE_SIZE,0,0,0 };
+static const struct atm_buffconst bcrx = { PAGE_SIZE,0,PAGE_SIZE,0,0,0 };
+
+#else
+
+static const struct atm_buffconst bctx = { sizeof(int),0,sizeof(int),0,0,0 };
+static const struct atm_buffconst bcrx = { sizeof(int),0,sizeof(int),0,0,0 };
+
+#endif
+ if (level == SOL_AAL && (optname == SO_BCTXOPT ||
+ optname == SO_BCRXOPT))
+ return copy_to_user(optval,optname == SO_BCTXOPT ? &bctx :
+ &bcrx,sizeof(struct atm_buffconst)) ? -EFAULT : 0;
+ return -EINVAL;
+}
+
+
+static int eni_setsockopt(struct atm_vcc *vcc,int level,int optname,
+ void *optval,int optlen)
+{
+ return -EINVAL;
+}
+
+
+static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb)
+{
+ unsigned long flags;
+
+ 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);
+ else dev_kfree_skb(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;
+ save_flags(flags);
+ cli(); /* brute force */
+ if (skb_peek(&ENI_VCC(vcc)->tx->backlog) || do_tx(skb)) {
+ skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb);
+ backlogged++;
+ }
+ restore_flags(flags);
+ return 0;
+}
+
+
+static int eni_sg_send(struct atm_vcc *vcc,unsigned long start,
+ unsigned long size)
+{
+ return vcc->qos.aal == ATM_AAL5 && !((start | size) & 3);
+ /* don't tolerate misalignment */
+}
+
+
+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)
+{
+ 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);
+ left--;
+ if (!left)
+ return sprintf(page,"Bursts: 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");
+ for (i = 0; i < NR_CHAN; i++) {
+ struct eni_tx *tx = eni_dev->tx+i;
+
+ if (!tx->send) continue;
+ if (--left) continue;
+ return sprintf(page,"tx[%d]: 0x%06lx-0x%06lx (%6ld bytes), "
+ "rsv %d cps, shp %d cps%s\n",i,
+ 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)" : "");
+ }
+ for (vcc = dev->vccs; vcc; vcc = vcc->next) {
+ struct eni_vcc *eni_vcc = ENI_VCC(vcc);
+ int length;
+
+ if (--left) continue;
+ length = sprintf(page,"vcc %4d: ",vcc->vci);
+ if (eni_vcc->rx) {
+ length += sprintf(page+length,"0x%06lx-0x%06lx "
+ "(%6ld bytes)",
+ 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]",
+ eni_vcc->tx->index);
+ page[length] = '\n';
+ return length+1;
+ }
+ 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 = eni_dev->ram+eni_dev->base_diff;
+ return sprintf(page,"free 0x%06lx-0x%06lx (%6d bytes)\n",
+ fe->start-offset,fe->start-offset+(1 << fe->order)-1,
+ 1 << fe->order);
+ }
+ return 0;
+}
+
+
+static const struct atmdev_ops ops = {
+ NULL, /* no dev_close */
+ eni_open,
+ eni_close,
+ eni_ioctl,
+ eni_getsockopt,
+ eni_setsockopt,
+ eni_send,
+ eni_sg_send,
+ NULL, /* no send_oam */
+ eni_phy_put,
+ eni_phy_get,
+ NULL, /* no feedback */
+ eni_change_qos, /* no change_qos */
+ NULL, /* no free_rx_skb */
+ eni_proc_read
+};
+
+
+__initfunc(int eni_detect(void))
+{
+ struct atm_dev *dev;
+ struct eni_dev *eni_dev;
+ int devs,type;
+
+ eni_dev = (struct eni_dev *) kmalloc(sizeof(struct eni_dev),
+ GFP_KERNEL);
+ if (!eni_dev) return -ENOMEM;
+ devs = 0;
+ for (type = 0; type < 2; type++) {
+ struct pci_dev *pci_dev;
+
+ pci_dev = NULL;
+ while ((pci_dev = pci_find_device(PCI_VENDOR_ID_EF,type ?
+ PCI_DEVICE_ID_EF_ATM_ASIC : PCI_DEVICE_ID_EF_ATM_FPGA,
+ pci_dev))) {
+ if (!devs) {
+ zeroes = kmalloc(4,GFP_KERNEL);
+ if (!zeroes) {
+ kfree(eni_dev);
+ return -ENOMEM;
+ }
+ }
+ dev = atm_dev_register(DEV_LABEL,&ops,-1,0);
+ if (!dev) break;
+ eni_dev->pci_dev = pci_dev;
+ ENI_DEV(dev) = eni_dev;
+ eni_dev->asic = type;
+ if (eni_init(dev) || eni_start(dev)) {
+ atm_dev_deregister(dev);
+ break;
+ }
+ eni_dev->more = eni_boards;
+ eni_boards = dev;
+ devs++;
+ eni_dev = (struct eni_dev *) kmalloc(sizeof(struct
+ eni_dev),GFP_KERNEL);
+ if (!eni_dev) break;
+ }
+ }
+ kfree(eni_dev);
+ if (!devs && zeroes) {
+ kfree(zeroes);
+ zeroes = NULL;
+ }
+ return devs;
+}
+
+
+#ifdef MODULE
+
+int init_module(void)
+{
+ if (!eni_detect()) {
+ printk(KERN_ERR DEV_LABEL ": no adapter found\n");
+ return -ENXIO;
+ }
+ MOD_INC_USE_COUNT;
+ return 0;
+}
+
+
+void cleanup_module(void)
+{
+ /*
+ * Well, there's no way to get rid of the driver yet, so we don't
+ * have to clean up, right ? :-)
+ */
+}
+
+#endif
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)