- u32 vpi, vci;
- vc_map *vc;
- struct sk_buff *iovb;
- struct iovec *iov;
- struct atm_vcc *vcc;
- struct sk_buff *skb;
- unsigned short aal5_len;
- int len;
- u32 stat;
-
- stat = readl(card->membase + STAT);
- card->sbfqc = ns_stat_sfbqc_get(stat);
- card->lbfqc = ns_stat_lfbqc_get(stat);
-
- skb = (struct sk_buff *) le32_to_cpu(rsqe->buffer_handle);
- vpi = ns_rsqe_vpi(rsqe);
- vci = ns_rsqe_vci(rsqe);
- if (vpi >= 1UL << card->vpibits || vci >= 1UL << card->vcibits)
- {
- printk("nicstar%d: SDU received for out-of-range vc %d.%d.\n",
- card->index, vpi, vci);
- recycle_rx_buf(card, skb);
- return;
- }
-
- vc = &(card->vcmap[vpi << card->vcibits | vci]);
- if (!vc->rx)
- {
- RXPRINTK("nicstar%d: SDU received on non-rx vc %d.%d.\n",
- card->index, vpi, vci);
- recycle_rx_buf(card, skb);
- return;
- }
-
- vcc = vc->rx_vcc;
-
- if (vcc->qos.aal == ATM_AAL0)
- {
- struct sk_buff *sb;
- unsigned char *cell;
- int i;
-
- cell = skb->data;
- for (i = ns_rsqe_cellcount(rsqe); i; i--)
- {
- if ((sb = dev_alloc_skb(NS_SMSKBSIZE)) == NULL)
- {
- printk("nicstar%d: Can't allocate buffers for aal0.\n",
- card->index);
- atomic_add(i,&vcc->stats->rx_drop);
- break;
- }
- if (!atm_charge(vcc, sb->truesize))
- {
- RXPRINTK("nicstar%d: atm_charge() dropped aal0 packets.\n",
- card->index);
- atomic_add(i-1,&vcc->stats->rx_drop); /* already increased by 1 */
- dev_kfree_skb_any(sb);
- break;
- }
- /* Rebuild the header */
- *((u32 *) sb->data) = le32_to_cpu(rsqe->word_1) << 4 |
- (ns_rsqe_clp(rsqe) ? 0x00000001 : 0x00000000);
- if (i == 1 && ns_rsqe_eopdu(rsqe))
- *((u32 *) sb->data) |= 0x00000002;
- skb_put(sb, NS_AAL0_HEADER);
- memcpy(skb_tail_pointer(sb), cell, ATM_CELL_PAYLOAD);
- skb_put(sb, ATM_CELL_PAYLOAD);
- ATM_SKB(sb)->vcc = vcc;
- __net_timestamp(sb);
- vcc->push(vcc, sb);
- atomic_inc(&vcc->stats->rx);
- cell += ATM_CELL_PAYLOAD;
- }
-
- recycle_rx_buf(card, skb);
- return;
- }
-
- /* To reach this point, the AAL layer can only be AAL5 */
-
- if ((iovb = vc->rx_iov) == NULL)
- {
- iovb = skb_dequeue(&(card->iovpool.queue));
- if (iovb == NULL) /* No buffers in the queue */
- {
- iovb = alloc_skb(NS_IOVBUFSIZE, GFP_ATOMIC);
- if (iovb == NULL)
- {
- printk("nicstar%d: Out of iovec buffers.\n", card->index);
- atomic_inc(&vcc->stats->rx_drop);
- recycle_rx_buf(card, skb);
- return;
- }
- NS_SKB_CB(iovb)->buf_type = BUF_NONE;
- }
- else
- if (--card->iovpool.count < card->iovnr.min)
- {
- struct sk_buff *new_iovb;
- if ((new_iovb = alloc_skb(NS_IOVBUFSIZE, GFP_ATOMIC)) != NULL)
- {
- NS_SKB_CB(iovb)->buf_type = BUF_NONE;
- skb_queue_tail(&card->iovpool.queue, new_iovb);
- card->iovpool.count++;
- }
- }
- vc->rx_iov = iovb;
- NS_SKB(iovb)->iovcnt = 0;
- iovb->len = 0;
- iovb->data = iovb->head;
- skb_reset_tail_pointer(iovb);
- NS_SKB(iovb)->vcc = vcc;
- /* IMPORTANT: a pointer to the sk_buff containing the small or large
- buffer is stored as iovec base, NOT a pointer to the
- small or large buffer itself. */
- }
- else if (NS_SKB(iovb)->iovcnt >= NS_MAX_IOVECS)
- {
- printk("nicstar%d: received too big AAL5 SDU.\n", card->index);
- atomic_inc(&vcc->stats->rx_err);
- recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data, NS_MAX_IOVECS);
- NS_SKB(iovb)->iovcnt = 0;
- iovb->len = 0;
- iovb->data = iovb->head;
- skb_reset_tail_pointer(iovb);
- NS_SKB(iovb)->vcc = vcc;
- }
- iov = &((struct iovec *) iovb->data)[NS_SKB(iovb)->iovcnt++];
- iov->iov_base = (void *) skb;
- iov->iov_len = ns_rsqe_cellcount(rsqe) * 48;
- iovb->len += iov->iov_len;
-
- if (NS_SKB(iovb)->iovcnt == 1)
- {
- if (NS_SKB_CB(skb)->buf_type != BUF_SM)
- {
- printk("nicstar%d: Expected a small buffer, and this is not one.\n",
- card->index);
- which_list(card, skb);
- atomic_inc(&vcc->stats->rx_err);
- recycle_rx_buf(card, skb);
- vc->rx_iov = NULL;
- recycle_iov_buf(card, iovb);
- return;
- }
- }
- else /* NS_SKB(iovb)->iovcnt >= 2 */
- {
- if (NS_SKB_CB(skb)->buf_type != BUF_LG)
- {
- printk("nicstar%d: Expected a large buffer, and this is not one.\n",
- card->index);
- which_list(card, skb);
- atomic_inc(&vcc->stats->rx_err);
- recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data,
- NS_SKB(iovb)->iovcnt);
- vc->rx_iov = NULL;
- recycle_iov_buf(card, iovb);
- return;
- }
- }
-
- if (ns_rsqe_eopdu(rsqe))
- {
- /* This works correctly regardless of the endianness of the host */
- unsigned char *L1L2 = (unsigned char *)((u32)skb->data +
- iov->iov_len - 6);
- aal5_len = L1L2[0] << 8 | L1L2[1];
- len = (aal5_len == 0x0000) ? 0x10000 : aal5_len;
- if (ns_rsqe_crcerr(rsqe) ||
- len + 8 > iovb->len || len + (47 + 8) < iovb->len)
- {
- printk("nicstar%d: AAL5 CRC error", card->index);
- if (len + 8 > iovb->len || len + (47 + 8) < iovb->len)
- printk(" - PDU size mismatch.\n");
- else
- printk(".\n");
- atomic_inc(&vcc->stats->rx_err);
- recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data,
- NS_SKB(iovb)->iovcnt);
- vc->rx_iov = NULL;
- recycle_iov_buf(card, iovb);
- return;
- }
-
- /* By this point we (hopefully) have a complete SDU without errors. */
-
- if (NS_SKB(iovb)->iovcnt == 1) /* Just a small buffer */
- {
- /* skb points to a small buffer */
- if (!atm_charge(vcc, skb->truesize))
- {
- push_rxbufs(card, skb);
- atomic_inc(&vcc->stats->rx_drop);
- }
- else
- {
- skb_put(skb, len);
- dequeue_sm_buf(card, skb);
+ u32 vpi, vci;
+ vc_map *vc;
+ struct sk_buff *iovb;
+ struct iovec *iov;
+ struct atm_vcc *vcc;
+ struct sk_buff *skb;
+ unsigned short aal5_len;
+ int len;
+ u32 stat;
+
+ stat = readl(card->membase + STAT);
+ card->sbfqc = ns_stat_sfbqc_get(stat);
+ card->lbfqc = ns_stat_lfbqc_get(stat);
+
+ skb = (struct sk_buff *)le32_to_cpu(rsqe->buffer_handle);
+ vpi = ns_rsqe_vpi(rsqe);
+ vci = ns_rsqe_vci(rsqe);
+ if (vpi >= 1UL << card->vpibits || vci >= 1UL << card->vcibits) {
+ printk("nicstar%d: SDU received for out-of-range vc %d.%d.\n",
+ card->index, vpi, vci);
+ recycle_rx_buf(card, skb);
+ return;
+ }
+
+ vc = &(card->vcmap[vpi << card->vcibits | vci]);
+ if (!vc->rx) {
+ RXPRINTK("nicstar%d: SDU received on non-rx vc %d.%d.\n",
+ card->index, vpi, vci);
+ recycle_rx_buf(card, skb);
+ return;
+ }
+
+ vcc = vc->rx_vcc;
+
+ if (vcc->qos.aal == ATM_AAL0) {
+ struct sk_buff *sb;
+ unsigned char *cell;
+ int i;
+
+ cell = skb->data;
+ for (i = ns_rsqe_cellcount(rsqe); i; i--) {
+ if ((sb = dev_alloc_skb(NS_SMSKBSIZE)) == NULL) {
+ printk
+ ("nicstar%d: Can't allocate buffers for aal0.\n",
+ card->index);
+ atomic_add(i, &vcc->stats->rx_drop);
+ break;
+ }
+ if (!atm_charge(vcc, sb->truesize)) {
+ RXPRINTK
+ ("nicstar%d: atm_charge() dropped aal0 packets.\n",
+ card->index);
+ atomic_add(i - 1, &vcc->stats->rx_drop); /* already increased by 1 */
+ dev_kfree_skb_any(sb);
+ break;
+ }
+ /* Rebuild the header */
+ *((u32 *) sb->data) = le32_to_cpu(rsqe->word_1) << 4 |
+ (ns_rsqe_clp(rsqe) ? 0x00000001 : 0x00000000);
+ if (i == 1 && ns_rsqe_eopdu(rsqe))
+ *((u32 *) sb->data) |= 0x00000002;
+ skb_put(sb, NS_AAL0_HEADER);
+ memcpy(skb_tail_pointer(sb), cell, ATM_CELL_PAYLOAD);
+ skb_put(sb, ATM_CELL_PAYLOAD);
+ ATM_SKB(sb)->vcc = vcc;
+ __net_timestamp(sb);
+ vcc->push(vcc, sb);
+ atomic_inc(&vcc->stats->rx);
+ cell += ATM_CELL_PAYLOAD;
+ }
+
+ recycle_rx_buf(card, skb);
+ return;
+ }
+
+ /* To reach this point, the AAL layer can only be AAL5 */
+
+ if ((iovb = vc->rx_iov) == NULL) {
+ iovb = skb_dequeue(&(card->iovpool.queue));
+ if (iovb == NULL) { /* No buffers in the queue */
+ iovb = alloc_skb(NS_IOVBUFSIZE, GFP_ATOMIC);
+ if (iovb == NULL) {
+ printk("nicstar%d: Out of iovec buffers.\n",
+ card->index);
+ atomic_inc(&vcc->stats->rx_drop);
+ recycle_rx_buf(card, skb);
+ return;
+ }
+ NS_SKB_CB(iovb)->buf_type = BUF_NONE;
+ } else if (--card->iovpool.count < card->iovnr.min) {
+ struct sk_buff *new_iovb;
+ if ((new_iovb =
+ alloc_skb(NS_IOVBUFSIZE, GFP_ATOMIC)) != NULL) {
+ NS_SKB_CB(iovb)->buf_type = BUF_NONE;
+ skb_queue_tail(&card->iovpool.queue, new_iovb);
+ card->iovpool.count++;
+ }
+ }
+ vc->rx_iov = iovb;
+ NS_SKB(iovb)->iovcnt = 0;
+ iovb->len = 0;
+ iovb->data = iovb->head;
+ skb_reset_tail_pointer(iovb);
+ NS_SKB(iovb)->vcc = vcc;
+ /* IMPORTANT: a pointer to the sk_buff containing the small or large
+ buffer is stored as iovec base, NOT a pointer to the
+ small or large buffer itself. */
+ } else if (NS_SKB(iovb)->iovcnt >= NS_MAX_IOVECS) {
+ printk("nicstar%d: received too big AAL5 SDU.\n", card->index);
+ atomic_inc(&vcc->stats->rx_err);
+ recycle_iovec_rx_bufs(card, (struct iovec *)iovb->data,
+ NS_MAX_IOVECS);
+ NS_SKB(iovb)->iovcnt = 0;
+ iovb->len = 0;
+ iovb->data = iovb->head;
+ skb_reset_tail_pointer(iovb);
+ NS_SKB(iovb)->vcc = vcc;
+ }
+ iov = &((struct iovec *)iovb->data)[NS_SKB(iovb)->iovcnt++];
+ iov->iov_base = (void *)skb;
+ iov->iov_len = ns_rsqe_cellcount(rsqe) * 48;
+ iovb->len += iov->iov_len;
+
+ if (NS_SKB(iovb)->iovcnt == 1) {
+ if (NS_SKB_CB(skb)->buf_type != BUF_SM) {
+ printk
+ ("nicstar%d: Expected a small buffer, and this is not one.\n",
+ card->index);
+ which_list(card, skb);
+ atomic_inc(&vcc->stats->rx_err);
+ recycle_rx_buf(card, skb);
+ vc->rx_iov = NULL;
+ recycle_iov_buf(card, iovb);
+ return;
+ }
+ } else { /* NS_SKB(iovb)->iovcnt >= 2 */
+
+ if (NS_SKB_CB(skb)->buf_type != BUF_LG) {
+ printk
+ ("nicstar%d: Expected a large buffer, and this is not one.\n",
+ card->index);
+ which_list(card, skb);
+ atomic_inc(&vcc->stats->rx_err);
+ recycle_iovec_rx_bufs(card, (struct iovec *)iovb->data,
+ NS_SKB(iovb)->iovcnt);
+ vc->rx_iov = NULL;
+ recycle_iov_buf(card, iovb);
+ return;
+ }
+ }
+
+ if (ns_rsqe_eopdu(rsqe)) {
+ /* This works correctly regardless of the endianness of the host */
+ unsigned char *L1L2 = (unsigned char *)((u32) skb->data +
+ iov->iov_len - 6);
+ aal5_len = L1L2[0] << 8 | L1L2[1];
+ len = (aal5_len == 0x0000) ? 0x10000 : aal5_len;
+ if (ns_rsqe_crcerr(rsqe) ||
+ len + 8 > iovb->len || len + (47 + 8) < iovb->len) {
+ printk("nicstar%d: AAL5 CRC error", card->index);
+ if (len + 8 > iovb->len || len + (47 + 8) < iovb->len)
+ printk(" - PDU size mismatch.\n");
+ else
+ printk(".\n");
+ atomic_inc(&vcc->stats->rx_err);
+ recycle_iovec_rx_bufs(card, (struct iovec *)iovb->data,
+ NS_SKB(iovb)->iovcnt);
+ vc->rx_iov = NULL;
+ recycle_iov_buf(card, iovb);
+ return;
+ }
+
+ /* By this point we (hopefully) have a complete SDU without errors. */
+
+ if (NS_SKB(iovb)->iovcnt == 1) { /* Just a small buffer */
+ /* skb points to a small buffer */
+ if (!atm_charge(vcc, skb->truesize)) {
+ push_rxbufs(card, skb);
+ atomic_inc(&vcc->stats->rx_drop);
+ } else {
+ skb_put(skb, len);
+ dequeue_sm_buf(card, skb);