[PATCH] e1000: Fix mulitple queues

Fixed stats when using multiple queues.
When multiple queues are enabled, log a message in syslog.
Fixed memory allocation for multiple queues.
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: John Ronciak <john.ronciak@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

drivers/net/e1000/e1000.h

@@ -72,10 +72,6 @@
 #include <linux/mii.h>
 #include <linux/ethtool.h>
 #include <linux/if_vlan.h>
-#ifdef CONFIG_E1000_MQ
-#include <linux/cpu.h>
-#include <linux/smp.h>
-#endif
 
 #define BAR_0		0
 #define BAR_1		1
@@ -87,6 +83,10 @@
 struct e1000_adapter;
 
 #include "e1000_hw.h"
+#ifdef CONFIG_E1000_MQ
+#include <linux/cpu.h>
+#include <linux/smp.h>
+#endif
 
 #ifdef DBG
 #define E1000_DBG(args...) printk(KERN_DEBUG "e1000: " args)
@@ -169,6 +169,13 @@ struct e1000_buffer {
 	uint16_t next_to_watch;
 };
 
+#ifdef CONFIG_E1000_MQ
+struct e1000_queue_stats {
+	uint64_t packets;
+	uint64_t bytes;
+};
+#endif
+
 struct e1000_ps_page { struct page *ps_page[PS_PAGE_BUFFERS]; };
 struct e1000_ps_page_dma { uint64_t ps_page_dma[PS_PAGE_BUFFERS]; };
 
@@ -194,6 +201,9 @@ struct e1000_tx_ring {
 
 	boolean_t last_tx_tso;
 
+#ifdef CONFIG_E1000_MQ
+	struct e1000_queue_stats tx_stats;
+#endif
 };
 
 struct e1000_rx_ring {
@@ -223,6 +233,9 @@ struct e1000_rx_ring {
 
 	uint16_t rdh;
 	uint16_t rdt;
+#ifdef CONFIG_E1000_MQ
+	struct e1000_queue_stats rx_stats;
+#endif
 };
 
 #define E1000_DESC_UNUSED(R) \
@@ -255,6 +268,9 @@ struct e1000_adapter {
 	uint16_t link_speed;
 	uint16_t link_duplex;
 	spinlock_t stats_lock;
+#ifdef CONFIG_E1000_NAPI
+	spinlock_t tx_queue_lock;
+#endif
 	atomic_t irq_sem;
 	struct work_struct tx_timeout_task;
 	struct work_struct watchdog_task;
@@ -302,7 +318,7 @@ struct e1000_adapter {
 #ifdef CONFIG_E1000_MQ
 	struct net_device **cpu_netdev;     /* per-cpu */
 	struct call_async_data_struct rx_sched_call_data;
-	int cpu_for_queue[4];
+	cpumask_t cpumask;
 #endif
 	int num_tx_queues;
 	int num_rx_queues;

drivers/net/e1000/e1000_ethtool.c

@@ -96,8 +96,18 @@ static const struct e1000_stats e1000_gstrings_stats[] = {
 	{ "rx_header_split", E1000_STAT(rx_hdr_split) },
 	{ "alloc_rx_buff_failed", E1000_STAT(alloc_rx_buff_failed) },
 };
-#define E1000_STATS_LEN	\
+
+#ifdef CONFIG_E1000_MQ
+#define E1000_QUEUE_STATS_LEN \
+	(((struct e1000_adapter *)netdev->priv)->num_tx_queues + \
+	 ((struct e1000_adapter *)netdev->priv)->num_rx_queues) \
+	* (sizeof(struct e1000_queue_stats) / sizeof(uint64_t))
+#else
+#define E1000_QUEUE_STATS_LEN 0
+#endif
+#define E1000_GLOBAL_STATS_LEN	\
 	sizeof(e1000_gstrings_stats) / sizeof(struct e1000_stats)
+#define E1000_STATS_LEN (E1000_GLOBAL_STATS_LEN + E1000_QUEUE_STATS_LEN)
 static const char e1000_gstrings_test[][ETH_GSTRING_LEN] = {
 	"Register test  (offline)", "Eeprom test    (offline)",
 	"Interrupt test (offline)", "Loopback test  (offline)",
@@ -1746,19 +1756,43 @@ e1000_get_ethtool_stats(struct net_device *netdev,
 		struct ethtool_stats *stats, uint64_t *data)
 {
 	struct e1000_adapter *adapter = netdev_priv(netdev);
+#ifdef CONFIG_E1000_MQ
+	uint64_t *queue_stat;
+	int stat_count = sizeof(struct e1000_queue_stats) / sizeof(uint64_t);
+	int j, k;
+#endif
 	int i;
 
 	e1000_update_stats(adapter);
-	for(i = 0; i < E1000_STATS_LEN; i++) {
-		char *p = (char *)adapter+e1000_gstrings_stats[i].stat_offset;	
-		data[i] = (e1000_gstrings_stats[i].sizeof_stat == 
+	for (i = 0; i < E1000_GLOBAL_STATS_LEN; i++) {
+		char *p = (char *)adapter+e1000_gstrings_stats[i].stat_offset;
+		data[i] = (e1000_gstrings_stats[i].sizeof_stat ==
 			sizeof(uint64_t)) ? *(uint64_t *)p : *(uint32_t *)p;
 	}
+#ifdef CONFIG_E1000_MQ
+	for (j = 0; j < adapter->num_tx_queues; j++) {
+		queue_stat = (uint64_t *)&adapter->tx_ring[j].tx_stats;
+		for (k = 0; k < stat_count; k++)
+			data[i + k] = queue_stat[k];
+		i += k;
+	}
+	for (j = 0; j < adapter->num_rx_queues; j++) {
+		queue_stat = (uint64_t *)&adapter->rx_ring[j].rx_stats;
+		for (k = 0; k < stat_count; k++)
+			data[i + k] = queue_stat[k];
+		i += k;
+	}
+#endif
+/*	BUG_ON(i != E1000_STATS_LEN); */
 }
 
 static void 
 e1000_get_strings(struct net_device *netdev, uint32_t stringset, uint8_t *data)
 {
+#ifdef CONFIG_E1000_MQ
+	struct e1000_adapter *adapter = netdev_priv(netdev);
+#endif
+	uint8_t *p = data;
 	int i;
 
 	switch(stringset) {
@@ -1767,11 +1801,26 @@ e1000_get_strings(struct net_device *netdev, uint32_t stringset, uint8_t *data)
 			E1000_TEST_LEN*ETH_GSTRING_LEN);
 		break;
 	case ETH_SS_STATS:
-		for (i=0; i < E1000_STATS_LEN; i++) {
-			memcpy(data + i * ETH_GSTRING_LEN, 
-			e1000_gstrings_stats[i].stat_string,
-			ETH_GSTRING_LEN);
+		for (i = 0; i < E1000_GLOBAL_STATS_LEN; i++) {
+			memcpy(p, e1000_gstrings_stats[i].stat_string,
+			       ETH_GSTRING_LEN);
+			p += ETH_GSTRING_LEN;
+		}
+#ifdef CONFIG_E1000_MQ
+		for (i = 0; i < adapter->num_tx_queues; i++) {
+			sprintf(p, "tx_queue_%u_packets", i);
+			p += ETH_GSTRING_LEN;
+			sprintf(p, "tx_queue_%u_bytes", i);
+			p += ETH_GSTRING_LEN;
 		}
+		for (i = 0; i < adapter->num_rx_queues; i++) {
+			sprintf(p, "rx_queue_%u_packets", i);
+			p += ETH_GSTRING_LEN;
+			sprintf(p, "rx_queue_%u_bytes", i);
+			p += ETH_GSTRING_LEN;
+		}
+#endif
+/*		BUG_ON(p - data != E1000_STATS_LEN * ETH_GSTRING_LEN); */
 		break;
 	}
 }

drivers/net/e1000/e1000_main.c

@@ -433,6 +433,12 @@ e1000_up(struct e1000_adapter *adapter)
 		return err;
 	}
 
+#ifdef CONFIG_E1000_MQ
+	e1000_setup_queue_mapping(adapter);
+#endif
+
+	adapter->tx_queue_len = netdev->tx_queue_len;
+
 	mod_timer(&adapter->watchdog_timer, jiffies);
 
 #ifdef CONFIG_E1000_NAPI
@@ -467,6 +473,7 @@ e1000_down(struct e1000_adapter *adapter)
 #ifdef CONFIG_E1000_NAPI
 	netif_poll_disable(netdev);
 #endif
+	netdev->tx_queue_len = adapter->tx_queue_len;
 	adapter->link_speed = 0;
 	adapter->link_duplex = 0;
 	netif_carrier_off(netdev);
@@ -989,6 +996,15 @@ e1000_sw_init(struct e1000_adapter *adapter)
 	}
 	adapter->num_rx_queues = min(adapter->num_rx_queues, num_online_cpus());
 	adapter->num_tx_queues = min(adapter->num_tx_queues, num_online_cpus());
+	DPRINTK(DRV, INFO, "Multiqueue Enabled: Rx Queue count = %u %s\n",
+		adapter->num_rx_queues,
+		((adapter->num_rx_queues == 1)
+		 ? ((num_online_cpus() > 1)
+			? "(due to unsupported feature in current adapter)"
+			: "(due to unsupported system configuration)")
+		 : ""));
+	DPRINTK(DRV, INFO, "Multiqueue Enabled: Tx Queue count = %u\n",
+		adapter->num_tx_queues);
 #else
 	adapter->num_tx_queues = 1;
 	adapter->num_rx_queues = 1;
@@ -1007,10 +1023,7 @@ e1000_sw_init(struct e1000_adapter *adapter)
 		dev_hold(&adapter->polling_netdev[i]);
 		set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
 	}
-#endif
-
-#ifdef CONFIG_E1000_MQ
-	e1000_setup_queue_mapping(adapter);
+	spin_lock_init(&adapter->tx_queue_lock);
 #endif
 
 	atomic_set(&adapter->irq_sem, 1);
@@ -1058,6 +1071,14 @@ e1000_alloc_queues(struct e1000_adapter *adapter)
 	memset(adapter->polling_netdev, 0, size);
 #endif
 
+#ifdef CONFIG_E1000_MQ
+	adapter->rx_sched_call_data.func = e1000_rx_schedule;
+	adapter->rx_sched_call_data.info = adapter->netdev;
+
+	adapter->cpu_netdev = alloc_percpu(struct net_device *);
+	adapter->cpu_tx_ring = alloc_percpu(struct e1000_tx_ring *);
+#endif
+
 	return E1000_SUCCESS;
 }
 
@@ -1084,7 +1105,8 @@ e1000_setup_queue_mapping(struct e1000_adapter *adapter)
 		 */
 		if (i < adapter->num_rx_queues) {
 			*per_cpu_ptr(adapter->cpu_netdev, cpu) = &adapter->polling_netdev[i];
-			adapter->cpu_for_queue[i] = cpu;
+			adapter->rx_ring[i].cpu = cpu;
+			cpu_set(cpu, adapter->cpumask);
 		} else
 			*per_cpu_ptr(adapter->cpu_netdev, cpu) = NULL;
 
@@ -3337,6 +3359,10 @@ e1000_clean_tx_irq(struct e1000_adapter *adapter,
 			if(unlikely(++i == tx_ring->count)) i = 0;
 		}
 
+#ifdef CONFIG_E1000_MQ
+		tx_ring->tx_stats.packets++;
+#endif
+
 		eop = tx_ring->buffer_info[i].next_to_watch;
 		eop_desc = E1000_TX_DESC(*tx_ring, eop);
 	}
@@ -3365,6 +3391,7 @@ e1000_clean_tx_irq(struct e1000_adapter *adapter,
 			eop = tx_ring->buffer_info[i].next_to_watch;
 			eop_desc = E1000_TX_DESC(*tx_ring, eop);
 			DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
+					"  Tx Queue             <%lu>\n"
 					"  TDH                  <%x>\n"
 					"  TDT                  <%x>\n"
 					"  next_to_use          <%x>\n"
@@ -3375,6 +3402,8 @@ e1000_clean_tx_irq(struct e1000_adapter *adapter,
 					"  next_to_watch        <%x>\n"
 					"  jiffies              <%lx>\n"
 					"  next_to_watch.status <%x>\n",
+				(unsigned long)((tx_ring - adapter->tx_ring) /
+					sizeof(struct e1000_tx_ring)),
 				readl(adapter->hw.hw_addr + tx_ring->tdh),
 				readl(adapter->hw.hw_addr + tx_ring->tdt),
 				tx_ring->next_to_use,
@@ -3541,6 +3570,10 @@ e1000_clean_rx_irq(struct e1000_adapter *adapter,
 		}
 #endif /* CONFIG_E1000_NAPI */
 		netdev->last_rx = jiffies;
+#ifdef CONFIG_E1000_MQ
+		rx_ring->rx_stats.packets++;
+		rx_ring->rx_stats.bytes += length;
+#endif
 
 next_desc:
 		rx_desc->status = 0;
@@ -3671,6 +3704,10 @@ e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 		}
 #endif /* CONFIG_E1000_NAPI */
 		netdev->last_rx = jiffies;
+#ifdef CONFIG_E1000_MQ
+		rx_ring->rx_stats.packets++;
+		rx_ring->rx_stats.bytes += length;
+#endif
 
 next_desc:
 		rx_desc->wb.middle.status_error &= ~0xFF;