@@ -191,21 +191,6 @@ struct myri10ge_slice_state {
int cpu;
__be32 __iomem *dca_tag;
#endif
-#ifdef CONFIG_NET_RX_BUSY_POLL
- unsigned int state;
-#define SLICE_STATE_IDLE 0
-#define SLICE_STATE_NAPI 1 /* NAPI owns this slice */
-#define SLICE_STATE_POLL 2 /* poll owns this slice */
-#define SLICE_LOCKED (SLICE_STATE_NAPI | SLICE_STATE_POLL)
-#define SLICE_STATE_NAPI_YIELD 4 /* NAPI yielded this slice */
-#define SLICE_STATE_POLL_YIELD 8 /* poll yielded this slice */
-#define SLICE_USER_PEND (SLICE_STATE_POLL | SLICE_STATE_POLL_YIELD)
- spinlock_t lock;
- unsigned long lock_napi_yield;
- unsigned long lock_poll_yield;
- unsigned long busy_poll_miss;
- unsigned long busy_poll_cnt;
-#endif /* CONFIG_NET_RX_BUSY_POLL */
char irq_desc[32];
};
@@ -925,92 +910,6 @@ static int myri10ge_dma_test(struct myri10ge_priv *mgp, int test_type)
return status;
}
-#ifdef CONFIG_NET_RX_BUSY_POLL
-static inline void myri10ge_ss_init_lock(struct myri10ge_slice_state *ss)
-{
- spin_lock_init(&ss->lock);
- ss->state = SLICE_STATE_IDLE;
-}
-
-static inline bool myri10ge_ss_lock_napi(struct myri10ge_slice_state *ss)
-{
- bool rc = true;
- spin_lock(&ss->lock);
- if ((ss->state & SLICE_LOCKED)) {
- WARN_ON((ss->state & SLICE_STATE_NAPI));
- ss->state |= SLICE_STATE_NAPI_YIELD;
- rc = false;
- ss->lock_napi_yield++;
- } else
- ss->state = SLICE_STATE_NAPI;
- spin_unlock(&ss->lock);
- return rc;
-}
-
-static inline void myri10ge_ss_unlock_napi(struct myri10ge_slice_state *ss)
-{
- spin_lock(&ss->lock);
- WARN_ON((ss->state & (SLICE_STATE_POLL | SLICE_STATE_NAPI_YIELD)));
- ss->state = SLICE_STATE_IDLE;
- spin_unlock(&ss->lock);
-}
-
-static inline bool myri10ge_ss_lock_poll(struct myri10ge_slice_state *ss)
-{
- bool rc = true;
- spin_lock_bh(&ss->lock);
- if ((ss->state & SLICE_LOCKED)) {
- ss->state |= SLICE_STATE_POLL_YIELD;
- rc = false;
- ss->lock_poll_yield++;
- } else
- ss->state |= SLICE_STATE_POLL;
- spin_unlock_bh(&ss->lock);
- return rc;
-}
-
-static inline void myri10ge_ss_unlock_poll(struct myri10ge_slice_state *ss)
-{
- spin_lock_bh(&ss->lock);
- WARN_ON((ss->state & SLICE_STATE_NAPI));
- ss->state = SLICE_STATE_IDLE;
- spin_unlock_bh(&ss->lock);
-}
-
-static inline bool myri10ge_ss_busy_polling(struct myri10ge_slice_state *ss)
-{
- WARN_ON(!(ss->state & SLICE_LOCKED));
- return (ss->state & SLICE_USER_PEND);
-}
-#else /* CONFIG_NET_RX_BUSY_POLL */
-static inline void myri10ge_ss_init_lock(struct myri10ge_slice_state *ss)
-{
-}
-
-static inline bool myri10ge_ss_lock_napi(struct myri10ge_slice_state *ss)
-{
- return false;
-}
-
-static inline void myri10ge_ss_unlock_napi(struct myri10ge_slice_state *ss)
-{
-}
-
-static inline bool myri10ge_ss_lock_poll(struct myri10ge_slice_state *ss)
-{
- return false;
-}
-
-static inline void myri10ge_ss_unlock_poll(struct myri10ge_slice_state *ss)
-{
-}
-
-static inline bool myri10ge_ss_busy_polling(struct myri10ge_slice_state *ss)
-{
- return false;
-}
-#endif
-
static int myri10ge_reset(struct myri10ge_priv *mgp)
{
struct myri10ge_cmd cmd;
@@ -1426,7 +1325,6 @@ myri10ge_rx_done(struct myri10ge_slice_state *ss, int len, __wsum csum)
struct pci_dev *pdev = mgp->pdev;
struct net_device *dev = mgp->dev;
u8 *va;
- bool polling;
if (len <= mgp->small_bytes) {
rx = &ss->rx_small;
@@ -1441,15 +1339,7 @@ myri10ge_rx_done(struct myri10ge_slice_state *ss, int len, __wsum csum)
va = page_address(rx->info[idx].page) + rx->info[idx].page_offset;
prefetch(va);
- /* When busy polling in user context, allocate skb and copy headers to
- * skb's linear memory ourselves. When not busy polling, use the napi
- * gro api.
- */
- polling = myri10ge_ss_busy_polling(ss);
- if (polling)
- skb = netdev_alloc_skb(dev, MYRI10GE_HLEN + 16);
- else
- skb = napi_get_frags(&ss->napi);
+ skb = napi_get_frags(&ss->napi);
if (unlikely(skb == NULL)) {
ss->stats.rx_dropped++;
for (i = 0, remainder = len; remainder > 0; i++) {
@@ -1489,27 +1379,7 @@ myri10ge_rx_done(struct myri10ge_slice_state *ss, int len, __wsum csum)
myri10ge_vlan_rx(mgp->dev, va, skb);
skb_record_rx_queue(skb, ss - &mgp->ss[0]);
- if (polling) {
- int hlen;
-
- /* myri10ge_vlan_rx might have moved the header, so compute
- * length and address again.
- */
- hlen = MYRI10GE_HLEN > skb->len ? skb->len : MYRI10GE_HLEN;
- va = page_address(skb_frag_page(&rx_frags[0])) +
- rx_frags[0].page_offset;
- /* Copy header into the skb linear memory */
- skb_copy_to_linear_data(skb, va, hlen);
- rx_frags[0].page_offset += hlen;
- rx_frags[0].size -= hlen;
- skb->data_len -= hlen;
- skb->tail += hlen;
- skb->protocol = eth_type_trans(skb, dev);
- skb_mark_napi_id(skb, &ss->napi);
- netif_receive_skb(skb);
- }
- else
- napi_gro_frags(&ss->napi);
+ napi_gro_frags(&ss->napi);
return 1;
}
@@ -1669,14 +1539,9 @@ static int myri10ge_poll(struct napi_struct *napi, int budget)
if (ss->mgp->dca_enabled)
myri10ge_update_dca(ss);
#endif
- /* Try later if the busy_poll handler is running. */
- if (!myri10ge_ss_lock_napi(ss))
- return budget;
-
/* process as many rx events as NAPI will allow */
work_done = myri10ge_clean_rx_done(ss, budget);
- myri10ge_ss_unlock_napi(ss);
if (work_done < budget) {
napi_complete_done(napi, work_done);
put_be32(htonl(3), ss->irq_claim);
@@ -1684,34 +1549,6 @@ static int myri10ge_poll(struct napi_struct *napi, int budget)
return work_done;
}
-#ifdef CONFIG_NET_RX_BUSY_POLL
-static int myri10ge_busy_poll(struct napi_struct *napi)
-{
- struct myri10ge_slice_state *ss =
- container_of(napi, struct myri10ge_slice_state, napi);
- struct myri10ge_priv *mgp = ss->mgp;
- int work_done;
-
- /* Poll only when the link is up */
- if (mgp->link_state != MXGEFW_LINK_UP)
- return LL_FLUSH_FAILED;
-
- if (!myri10ge_ss_lock_poll(ss))
- return LL_FLUSH_BUSY;
-
- /* Process a small number of packets */
- work_done = myri10ge_clean_rx_done(ss, 4);
- if (work_done)
- ss->busy_poll_cnt += work_done;
- else
- ss->busy_poll_miss++;
-
- myri10ge_ss_unlock_poll(ss);
-
- return work_done;
-}
-#endif /* CONFIG_NET_RX_BUSY_POLL */
-
static irqreturn_t myri10ge_intr(int irq, void *arg)
{
struct myri10ge_slice_state *ss = arg;
@@ -1919,10 +1756,6 @@ static const char myri10ge_gstrings_slice_stats[][ETH_GSTRING_LEN] = {
"tx_pkt_start", "tx_pkt_done", "tx_req", "tx_done",
"rx_small_cnt", "rx_big_cnt",
"wake_queue", "stop_queue", "tx_linearized",
-#ifdef CONFIG_NET_RX_BUSY_POLL
- "rx_lock_napi_yield", "rx_lock_poll_yield", "rx_busy_poll_miss",
- "rx_busy_poll_cnt",
-#endif
};
#define MYRI10GE_NET_STATS_LEN 21
@@ -2022,12 +1855,6 @@ myri10ge_get_ethtool_stats(struct net_device *netdev,
data[i++] = (unsigned int)ss->tx.wake_queue;
data[i++] = (unsigned int)ss->tx.stop_queue;
data[i++] = (unsigned int)ss->tx.linearized;
-#ifdef CONFIG_NET_RX_BUSY_POLL
- data[i++] = ss->lock_napi_yield;
- data[i++] = ss->lock_poll_yield;
- data[i++] = ss->busy_poll_miss;
- data[i++] = ss->busy_poll_cnt;
-#endif
}
}
@@ -2589,9 +2416,6 @@ static int myri10ge_open(struct net_device *dev)
goto abort_with_rings;
}
- /* Initialize the slice spinlock and state used for polling */
- myri10ge_ss_init_lock(ss);
-
/* must happen prior to any irq */
napi_enable(&(ss)->napi);
}
@@ -2668,19 +2492,9 @@ static int myri10ge_close(struct net_device *dev)
del_timer_sync(&mgp->watchdog_timer);
mgp->running = MYRI10GE_ETH_STOPPING;
- for (i = 0; i < mgp->num_slices; i++) {
+ for (i = 0; i < mgp->num_slices; i++)
napi_disable(&mgp->ss[i].napi);
- local_bh_disable(); /* myri10ge_ss_lock_napi needs this */
- /* Lock the slice to prevent the busy_poll handler from
- * accessing it. Later when we bring the NIC up, myri10ge_open
- * resets the slice including this lock.
- */
- while (!myri10ge_ss_lock_napi(&mgp->ss[i])) {
- pr_info("Slice %d locked\n", i);
- mdelay(1);
- }
- local_bh_enable();
- }
+
netif_carrier_off(dev);
netif_tx_stop_all_queues(dev);
@@ -3953,9 +3767,6 @@ static const struct net_device_ops myri10ge_netdev_ops = {
.ndo_change_mtu = myri10ge_change_mtu,
.ndo_set_rx_mode = myri10ge_set_multicast_list,
.ndo_set_mac_address = myri10ge_set_mac_address,
-#ifdef CONFIG_NET_RX_BUSY_POLL
- .ndo_busy_poll = myri10ge_busy_poll,
-#endif
};
static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent)