X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fnet%2Fcxgb3%2Fsge.c;h=87919419b707faf3107877181dd96ec0b8cd5938;hb=c170ecf434bceb0e188b14a6deb3bfa3ec9ef699;hp=1b0861d73ab7d00ef103ab2d58de7975b134ab20;hpb=eda3d8f5604860aae1bb9996bb5efc4213778369;p=linux-2.6-omap-h63xx.git

diff --git a/drivers/net/cxgb3/sge.c b/drivers/net/cxgb3/sge.c
index 1b0861d73ab..87919419b70 100644
--- a/drivers/net/cxgb3/sge.c
+++ b/drivers/net/cxgb3/sge.c
@@ -351,7 +351,8 @@ static void free_rx_bufs(struct pci_dev *pdev, struct sge_fl *q)
 		pci_unmap_single(pdev, pci_unmap_addr(d, dma_addr),
 				 q->buf_size, PCI_DMA_FROMDEVICE);
 		if (q->use_pages) {
-			put_page(d->pg_chunk.page);
+			if (d->pg_chunk.page)
+				put_page(d->pg_chunk.page);
 			d->pg_chunk.page = NULL;
 		} else {
 			kfree_skb(d->skb);
@@ -583,7 +584,7 @@ static void t3_reset_qset(struct sge_qset *q)
 	memset(q->fl, 0, sizeof(struct sge_fl) * SGE_RXQ_PER_SET);
 	memset(q->txq, 0, sizeof(struct sge_txq) * SGE_TXQ_PER_SET);
 	q->txq_stopped = 0;
-	memset(&q->tx_reclaim_timer, 0, sizeof(q->tx_reclaim_timer));
+	q->tx_reclaim_timer.function = NULL; /* for t3_stop_sge_timers() */
 	kfree(q->lro_frag_tbl);
 	q->lro_nfrags = q->lro_frag_len = 0;
 }
@@ -603,9 +604,6 @@ static void t3_free_qset(struct adapter *adapter, struct sge_qset *q)
 	int i;
 	struct pci_dev *pdev = adapter->pdev;
 
-	if (q->tx_reclaim_timer.function)
-		del_timer_sync(&q->tx_reclaim_timer);
-
 	for (i = 0; i < SGE_RXQ_PER_SET; ++i)
 		if (q->fl[i].desc) {
 			spin_lock_irq(&adapter->sge.reg_lock);
@@ -1704,16 +1702,15 @@ int t3_offload_tx(struct t3cdev *tdev, struct sk_buff *skb)
  */
 static inline void offload_enqueue(struct sge_rspq *q, struct sk_buff *skb)
 {
-	skb->next = skb->prev = NULL;
-	if (q->rx_tail)
-		q->rx_tail->next = skb;
-	else {
+	int was_empty = skb_queue_empty(&q->rx_queue);
+
+	__skb_queue_tail(&q->rx_queue, skb);
+
+	if (was_empty) {
 		struct sge_qset *qs = rspq_to_qset(q);
 
 		napi_schedule(&qs->napi);
-		q->rx_head = skb;
 	}
-	q->rx_tail = skb;
 }
 
 /**
@@ -1754,26 +1751,29 @@ static int ofld_poll(struct napi_struct *napi, int budget)
 	int work_done = 0;
 
 	while (work_done < budget) {
-		struct sk_buff *head, *tail, *skbs[RX_BUNDLE_SIZE];
+		struct sk_buff *skb, *tmp, *skbs[RX_BUNDLE_SIZE];
+		struct sk_buff_head queue;
 		int ngathered;
 
 		spin_lock_irq(&q->lock);
-		head = q->rx_head;
-		if (!head) {
+		__skb_queue_head_init(&queue);
+		skb_queue_splice_init(&q->rx_queue, &queue);
+		if (skb_queue_empty(&queue)) {
 			napi_complete(napi);
 			spin_unlock_irq(&q->lock);
 			return work_done;
 		}
-
-		tail = q->rx_tail;
-		q->rx_head = q->rx_tail = NULL;
 		spin_unlock_irq(&q->lock);
 
-		for (ngathered = 0; work_done < budget && head; work_done++) {
-			prefetch(head->data);
-			skbs[ngathered] = head;
-			head = head->next;
-			skbs[ngathered]->next = NULL;
+		ngathered = 0;
+		skb_queue_walk_safe(&queue, skb, tmp) {
+			if (work_done >= budget)
+				break;
+			work_done++;
+
+			__skb_unlink(skb, &queue);
+			prefetch(skb->data);
+			skbs[ngathered] = skb;
 			if (++ngathered == RX_BUNDLE_SIZE) {
 				q->offload_bundles++;
 				adapter->tdev.recv(&adapter->tdev, skbs,
@@ -1781,12 +1781,10 @@ static int ofld_poll(struct napi_struct *napi, int budget)
 				ngathered = 0;
 			}
 		}
-		if (head) {	/* splice remaining packets back onto Rx queue */
+		if (!skb_queue_empty(&queue)) {
+			/* splice remaining packets back onto Rx queue */
 			spin_lock_irq(&q->lock);
-			tail->next = q->rx_head;
-			if (!q->rx_head)
-				q->rx_tail = tail;
-			q->rx_head = head;
+			skb_queue_splice(&queue, &q->rx_queue);
 			spin_unlock_irq(&q->lock);
 		}
 		deliver_partial_bundle(&adapter->tdev, q, skbs, ngathered);
@@ -1937,38 +1935,6 @@ static inline int lro_frame_ok(const struct cpl_rx_pkt *p)
 		eh->h_proto == htons(ETH_P_IP) && ih->ihl == (sizeof(*ih) >> 2);
 }
 
-#define TCP_FLAG_MASK (TCP_FLAG_CWR | TCP_FLAG_ECE | TCP_FLAG_URG |\
-                       TCP_FLAG_ACK | TCP_FLAG_PSH | TCP_FLAG_RST |\
-		                       TCP_FLAG_SYN | TCP_FLAG_FIN)
-#define TSTAMP_WORD ((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16) |\
-                     (TCPOPT_TIMESTAMP << 8) | TCPOLEN_TIMESTAMP)
-
-/**
- *	lro_segment_ok - check if a TCP segment is eligible for LRO
- *	@tcph: the TCP header of the packet
- *
- *	Returns true if a TCP packet is eligible for LRO.  This requires that
- *	the packet have only the ACK flag set and no TCP options besides
- *	time stamps.
- */
-static inline int lro_segment_ok(const struct tcphdr *tcph)
-{
-	int optlen;
-
-	if (unlikely((tcp_flag_word(tcph) & TCP_FLAG_MASK) != TCP_FLAG_ACK))
-		return 0;
-
-	optlen = (tcph->doff << 2) - sizeof(*tcph);
-	if (optlen) {
-		const u32 *opt = (const u32 *)(tcph + 1);
-
-		if (optlen != TCPOLEN_TSTAMP_ALIGNED ||
-		    *opt != htonl(TSTAMP_WORD) || !opt[2])
-			return 0;
-	}
-	return 1;
-}
-
 static int t3_get_lro_header(void **eh,  void **iph, void **tcph,
 			     u64 *hdr_flags, void *priv)
 {
@@ -1981,9 +1947,6 @@ static int t3_get_lro_header(void **eh,  void **iph, void **tcph,
 	*iph = (struct iphdr *)((struct ethhdr *)*eh + 1);
 	*tcph = (struct tcphdr *)((struct iphdr *)*iph + 1);
 
-	 if (!lro_segment_ok(*tcph))
-		return -1;
-
 	*hdr_flags = LRO_IPV4 | LRO_TCP;
 	return 0;
 }
@@ -2878,9 +2841,7 @@ int t3_sge_alloc_qset(struct adapter *adapter, unsigned int id, int nports,
 	struct net_lro_mgr *lro_mgr = &q->lro_mgr;
 
 	init_qset_cntxt(q, id);
-	init_timer(&q->tx_reclaim_timer);
-	q->tx_reclaim_timer.data = (unsigned long)q;
-	q->tx_reclaim_timer.function = sge_timer_cb;
+	setup_timer(&q->tx_reclaim_timer, sge_timer_cb, (unsigned long)q);
 
 	q->fl[0].desc = alloc_ring(adapter->pdev, p->fl_size,
 				   sizeof(struct rx_desc),
@@ -2934,6 +2895,7 @@ int t3_sge_alloc_qset(struct adapter *adapter, unsigned int id, int nports,
 	q->rspq.gen = 1;
 	q->rspq.size = p->rspq_size;
 	spin_lock_init(&q->rspq.lock);
+	skb_queue_head_init(&q->rspq.rx_queue);
 
 	q->txq[TXQ_ETH].stop_thres = nports *
 	    flits_to_desc(sgl_len(MAX_SKB_FRAGS + 1) + 3);
@@ -3042,6 +3004,24 @@ err:
 	return ret;
 }
 
+/**
+ *	t3_stop_sge_timers - stop SGE timer call backs
+ *	@adap: the adapter
+ *
+ *	Stops each SGE queue set's timer call back
+ */
+void t3_stop_sge_timers(struct adapter *adap)
+{
+	int i;
+
+	for (i = 0; i < SGE_QSETS; ++i) {
+		struct sge_qset *q = &adap->sge.qs[i];
+
+		if (q->tx_reclaim_timer.function)
+			del_timer_sync(&q->tx_reclaim_timer);
+	}
+}
+
 /**
  *	t3_free_sge_resources - free SGE resources
  *	@adap: the adapter