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Date: Mon, 9 Mar 2009 11:50:52 -0700
From: Dhananjay Phadke <dhananjay@...xen.com>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net
Subject: [patch next 1/5] netxen: cleanup rx handling
o remove unused rx fragment handling code.
o imporove check for status descriptor ownership.
Signed-off-by: Dhananjay Phadke <dhananjay@...xen.com>
---
drivers/net/netxen/netxen_nic.h | 16 +-------
drivers/net/netxen/netxen_nic_init.c | 71 +++++----------------------------
2 files changed, 13 insertions(+), 74 deletions(-)
diff --git a/drivers/net/netxen/netxen_nic.h b/drivers/net/netxen/netxen_nic.h
index ce2b391..92a0c77 100644
--- a/drivers/net/netxen/netxen_nic.h
+++ b/drivers/net/netxen/netxen_nic.h
@@ -392,11 +392,8 @@ struct rcv_desc {
#define STATUS_CKSUM_OK (2)
/* owner bits of status_desc */
-#define STATUS_OWNER_HOST (0x1)
-#define STATUS_OWNER_PHANTOM (0x2)
-
-#define NETXEN_PROT_IP (1)
-#define NETXEN_PROT_UNKNOWN (0)
+#define STATUS_OWNER_HOST (0x1ULL << 56)
+#define STATUS_OWNER_PHANTOM (0x2ULL << 56)
/* Note: sizeof(status_desc) should always be a mutliple of 2 */
@@ -422,15 +419,6 @@ struct rcv_desc {
#define netxen_get_sts_opcode(sts_data) \
(((sts_data) >> 58) & 0x03F)
-#define netxen_get_sts_owner(status_desc) \
- ((le64_to_cpu((status_desc)->status_desc_data) >> 56) & 0x03)
-#define netxen_set_sts_owner(status_desc, val) { \
- (status_desc)->status_desc_data = \
- ((status_desc)->status_desc_data & \
- ~cpu_to_le64(0x3ULL << 56)) | \
- cpu_to_le64((u64)((val) & 0x3) << 56); \
-}
-
struct status_desc {
/* Bit pattern: 0-3 port, 4-7 status, 8-11 type, 12-27 total_length
28-43 reference_handle, 44-47 protocol, 48-52 pkt_offset
diff --git a/drivers/net/netxen/netxen_nic_init.c b/drivers/net/netxen/netxen_nic_init.c
index f323cee..f816434 100644
--- a/drivers/net/netxen/netxen_nic_init.c
+++ b/drivers/net/netxen/netxen_nic_init.c
@@ -838,13 +838,8 @@ no_skb:
return skb;
}
-/*
- * netxen_process_rcv() send the received packet to the protocol stack.
- * and if the number of receives exceeds RX_BUFFERS_REFILL, then we
- * invoke the routine to send more rx buffers to the Phantom...
- */
static void netxen_process_rcv(struct netxen_adapter *adapter, int ctxid,
- struct status_desc *desc, struct status_desc *frag_desc)
+ struct status_desc *desc)
{
struct net_device *netdev = adapter->netdev;
u64 sts_data = le64_to_cpu(desc->status_desc_data);
@@ -859,15 +854,11 @@ static void netxen_process_rcv(struct netxen_adapter *adapter, int ctxid,
desc_ctx = netxen_get_sts_type(sts_data);
if (unlikely(desc_ctx >= NUM_RCV_DESC_RINGS)) {
- printk("%s: %s Bad Rcv descriptor ring\n",
- netxen_nic_driver_name, netdev->name);
return;
}
rds_ring = &recv_ctx->rds_rings[desc_ctx];
if (unlikely(index > rds_ring->max_rx_desc_count)) {
- DPRINTK(ERR, "Got a buffer index:%x Max is %x\n",
- index, rds_ring->max_rx_desc_count);
return;
}
buffer = &rds_ring->rx_buf_arr[index];
@@ -879,14 +870,6 @@ static void netxen_process_rcv(struct netxen_adapter *adapter, int ctxid,
buffer->lro_length = length;
}
if (buffer->lro_current_frags != buffer->lro_expected_frags) {
- if (buffer->lro_expected_frags != 0) {
- printk("LRO: (refhandle:%x) recv frag. "
- "wait for last. flags: %x expected:%d "
- "have:%d\n", index,
- netxen_get_sts_desc_lro_last_frag(desc),
- buffer->lro_expected_frags,
- buffer->lro_current_frags);
- }
return;
}
}
@@ -913,28 +896,10 @@ static void netxen_process_rcv(struct netxen_adapter *adapter, int ctxid,
skb->protocol = eth_type_trans(skb, netdev);
- /*
- * rx buffer chaining is disabled, walk and free
- * any spurious rx buffer chain.
- */
- if (frag_desc) {
- u16 i, nr_frags = desc->nr_frags;
-
- dev_kfree_skb_any(skb);
- for (i = 0; i < nr_frags; i++) {
- index = le16_to_cpu(frag_desc->frag_handles[i]);
- skb = netxen_process_rxbuf(adapter,
- rds_ring, index, cksum);
- if (skb)
- dev_kfree_skb_any(skb);
- }
- adapter->stats.rxdropped++;
- } else {
- netif_receive_skb(skb);
+ netif_receive_skb(skb);
- adapter->stats.no_rcv++;
- adapter->stats.rxbytes += length;
- }
+ adapter->stats.no_rcv++;
+ adapter->stats.rxbytes += length;
}
/* Process Receive status ring */
@@ -942,7 +907,7 @@ u32 netxen_process_rcv_ring(struct netxen_adapter *adapter, int ctxid, int max)
{
struct netxen_recv_context *recv_ctx = &(adapter->recv_ctx[ctxid]);
struct status_desc *desc_head = recv_ctx->rcv_status_desc_head;
- struct status_desc *desc, *frag_desc;
+ struct status_desc *desc;
u32 consumer = recv_ctx->status_rx_consumer;
int count = 0, ring;
u64 sts_data;
@@ -950,41 +915,27 @@ u32 netxen_process_rcv_ring(struct netxen_adapter *adapter, int ctxid, int max)
while (count < max) {
desc = &desc_head[consumer];
- if (!(netxen_get_sts_owner(desc) & STATUS_OWNER_HOST)) {
- DPRINTK(ERR, "desc %p ownedby %x\n", desc,
- netxen_get_sts_owner(desc));
+ sts_data = le64_to_cpu(desc->status_desc_data);
+
+ if (!(sts_data & STATUS_OWNER_HOST))
break;
- }
- sts_data = le64_to_cpu(desc->status_desc_data);
opcode = netxen_get_sts_opcode(sts_data);
- frag_desc = NULL;
- if (opcode == NETXEN_NIC_RXPKT_DESC) {
- if (desc->nr_frags) {
- consumer = get_next_index(consumer,
- adapter->max_rx_desc_count);
- frag_desc = &desc_head[consumer];
- netxen_set_sts_owner(frag_desc,
- STATUS_OWNER_PHANTOM);
- }
- }
- netxen_process_rcv(adapter, ctxid, desc, frag_desc);
+ netxen_process_rcv(adapter, ctxid, desc);
- netxen_set_sts_owner(desc, STATUS_OWNER_PHANTOM);
+ desc->status_desc_data = cpu_to_le64(STATUS_OWNER_PHANTOM);
consumer = get_next_index(consumer,
adapter->max_rx_desc_count);
count++;
}
+
for (ring = 0; ring < adapter->max_rds_rings; ring++)
netxen_post_rx_buffers_nodb(adapter, ctxid, ring);
- /* update the consumer index in phantom */
if (count) {
recv_ctx->status_rx_consumer = consumer;
-
- /* Window = 1 */
adapter->pci_write_normalize(adapter,
recv_ctx->crb_sts_consumer, consumer);
}
--
1.6.0.2
--
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