|
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH V4 net-next 1/5] xen-netback: Factor queue-specific data into queue struct.
From: "Andrew J. Bennieston" <andrew.bennieston@xxxxxxxxxx>
In preparation for multi-queue support in xen-netback, move the
queue-specific data from struct xenvif into struct xenvif_queue, and
update the rest of the code to use this.
Also adds loops over queues where appropriate, even though only one is
configured at this point, and uses alloc_netdev_mq() and the
corresponding multi-queue netif wake/start/stop functions in preparation
for multiple active queues.
Finally, implements a trivial queue selection function suitable for
ndo_select_queue, which simply returns 0 for a single queue and uses
skb_get_hash() to compute the queue index otherwise.
Signed-off-by: Andrew J. Bennieston <andrew.bennieston@xxxxxxxxxx>
---
drivers/net/xen-netback/common.h | 81 ++++--
drivers/net/xen-netback/interface.c | 314 ++++++++++++++-------
drivers/net/xen-netback/netback.c | 528 ++++++++++++++++++-----------------
drivers/net/xen-netback/xenbus.c | 87 ++++--
4 files changed, 593 insertions(+), 417 deletions(-)
diff --git a/drivers/net/xen-netback/common.h b/drivers/net/xen-netback/common.h
index ae413a2..2550867 100644
--- a/drivers/net/xen-netback/common.h
+++ b/drivers/net/xen-netback/common.h
@@ -108,17 +108,36 @@ struct xenvif_rx_meta {
*/
#define MAX_GRANT_COPY_OPS (MAX_SKB_FRAGS * XEN_NETIF_RX_RING_SIZE)
-struct xenvif {
- /* Unique identifier for this interface. */
- domid_t domid;
- unsigned int handle;
+/* Queue name is interface name with "-qNNN" appended */
+#define QUEUE_NAME_SIZE (IFNAMSIZ + 6)
+
+/* IRQ name is queue name with "-tx" or "-rx" appended */
+#define IRQ_NAME_SIZE (QUEUE_NAME_SIZE + 4)
+
+struct xenvif;
+
+struct xenvif_stats {
+ /* Stats fields to be updated per-queue.
+ * A subset of struct net_device_stats that contains only the
+ * fields that are updated in netback.c for each queue.
+ */
+ unsigned int rx_bytes;
+ unsigned int rx_packets;
+ unsigned int tx_bytes;
+ unsigned int tx_packets;
+};
+
+struct xenvif_queue { /* Per-queue data for xenvif */
+ unsigned int id; /* Queue ID, 0-based */
+ char name[QUEUE_NAME_SIZE]; /* DEVNAME-qN */
+ struct xenvif *vif; /* Parent VIF */
/* Use NAPI for guest TX */
struct napi_struct napi;
/* When feature-split-event-channels = 0, tx_irq = rx_irq. */
unsigned int tx_irq;
/* Only used when feature-split-event-channels = 1 */
- char tx_irq_name[IFNAMSIZ+4]; /* DEVNAME-tx */
+ char tx_irq_name[IRQ_NAME_SIZE]; /* DEVNAME-qN-tx */
struct xen_netif_tx_back_ring tx;
struct sk_buff_head tx_queue;
struct page *mmap_pages[MAX_PENDING_REQS];
@@ -140,19 +159,34 @@ struct xenvif {
/* When feature-split-event-channels = 0, tx_irq = rx_irq. */
unsigned int rx_irq;
/* Only used when feature-split-event-channels = 1 */
- char rx_irq_name[IFNAMSIZ+4]; /* DEVNAME-rx */
+ char rx_irq_name[IRQ_NAME_SIZE]; /* DEVNAME-qN-rx */
struct xen_netif_rx_back_ring rx;
struct sk_buff_head rx_queue;
RING_IDX rx_last_skb_slots;
- /* This array is allocated seperately as it is large */
- struct gnttab_copy *grant_copy_op;
+ struct gnttab_copy grant_copy_op[MAX_GRANT_COPY_OPS];
/* We create one meta structure per ring request we consume, so
* the maximum number is the same as the ring size.
*/
struct xenvif_rx_meta meta[XEN_NETIF_RX_RING_SIZE];
+ /* Transmit shaping: allow 'credit_bytes' every 'credit_usec'. */
+ unsigned long credit_bytes;
+ unsigned long credit_usec;
+ unsigned long remaining_credit;
+ struct timer_list credit_timeout;
+ u64 credit_window_start;
+
+ /* Statistics */
+ struct xenvif_stats stats;
+};
+
+struct xenvif {
+ /* Unique identifier for this interface. */
+ domid_t domid;
+ unsigned int handle;
+
u8 fe_dev_addr[6];
/* Frontend feature information. */
@@ -166,15 +200,12 @@ struct xenvif {
/* Internal feature information. */
u8 can_queue:1; /* can queue packets for receiver? */
- /* Transmit shaping: allow 'credit_bytes' every 'credit_usec'. */
- unsigned long credit_bytes;
- unsigned long credit_usec;
- unsigned long remaining_credit;
- struct timer_list credit_timeout;
- u64 credit_window_start;
+ /* Queues */
+ unsigned int num_queues;
+ struct xenvif_queue *queues;
/* Statistics */
- unsigned long rx_gso_checksum_fixup;
+ atomic_t rx_gso_checksum_fixup;
/* Miscellaneous private stuff. */
struct net_device *dev;
@@ -189,7 +220,9 @@ struct xenvif *xenvif_alloc(struct device *parent,
domid_t domid,
unsigned int handle);
-int xenvif_connect(struct xenvif *vif, unsigned long tx_ring_ref,
+void xenvif_init_queue(struct xenvif_queue *queue);
+
+int xenvif_connect(struct xenvif_queue *queue, unsigned long tx_ring_ref,
unsigned long rx_ring_ref, unsigned int tx_evtchn,
unsigned int rx_evtchn);
void xenvif_disconnect(struct xenvif *vif);
@@ -200,31 +233,31 @@ void xenvif_xenbus_fini(void);
int xenvif_schedulable(struct xenvif *vif);
-int xenvif_must_stop_queue(struct xenvif *vif);
+int xenvif_must_stop_queue(struct xenvif_queue *queue);
/* (Un)Map communication rings. */
-void xenvif_unmap_frontend_rings(struct xenvif *vif);
-int xenvif_map_frontend_rings(struct xenvif *vif,
+void xenvif_unmap_frontend_rings(struct xenvif_queue *queue);
+int xenvif_map_frontend_rings(struct xenvif_queue *queue,
grant_ref_t tx_ring_ref,
grant_ref_t rx_ring_ref);
/* Check for SKBs from frontend and schedule backend processing */
-void xenvif_check_rx_xenvif(struct xenvif *vif);
+void xenvif_check_rx_xenvif(struct xenvif_queue *queue);
/* Prevent the device from generating any further traffic. */
void xenvif_carrier_off(struct xenvif *vif);
-int xenvif_tx_action(struct xenvif *vif, int budget);
+int xenvif_tx_action(struct xenvif_queue *queue, int budget);
int xenvif_kthread(void *data);
-void xenvif_kick_thread(struct xenvif *vif);
+void xenvif_kick_thread(struct xenvif_queue *queue);
/* Determine whether the needed number of slots (req) are available,
* and set req_event if not.
*/
-bool xenvif_rx_ring_slots_available(struct xenvif *vif, int needed);
+bool xenvif_rx_ring_slots_available(struct xenvif_queue *queue, int needed);
-void xenvif_stop_queue(struct xenvif *vif);
+void xenvif_carrier_on(struct xenvif *vif);
extern bool separate_tx_rx_irq;
diff --git a/drivers/net/xen-netback/interface.c
b/drivers/net/xen-netback/interface.c
index 7669d49..daf93f6 100644
--- a/drivers/net/xen-netback/interface.c
+++ b/drivers/net/xen-netback/interface.c
@@ -34,7 +34,6 @@
#include <linux/ethtool.h>
#include <linux/rtnetlink.h>
#include <linux/if_vlan.h>
-#include <linux/vmalloc.h>
#include <xen/events.h>
#include <asm/xen/hypercall.h>
@@ -42,6 +41,16 @@
#define XENVIF_QUEUE_LENGTH 32
#define XENVIF_NAPI_WEIGHT 64
+static inline void xenvif_stop_queue(struct xenvif_queue *queue)
+{
+ struct net_device *dev = queue->vif->dev;
+
+ if (!queue->vif->can_queue)
+ return;
+
+ netif_tx_stop_queue(netdev_get_tx_queue(dev, queue->id));
+}
+
int xenvif_schedulable(struct xenvif *vif)
{
return netif_running(vif->dev) && netif_carrier_ok(vif->dev);
@@ -49,20 +58,20 @@ int xenvif_schedulable(struct xenvif *vif)
static irqreturn_t xenvif_tx_interrupt(int irq, void *dev_id)
{
- struct xenvif *vif = dev_id;
+ struct xenvif_queue *queue = dev_id;
- if (RING_HAS_UNCONSUMED_REQUESTS(&vif->tx))
- napi_schedule(&vif->napi);
+ if (RING_HAS_UNCONSUMED_REQUESTS(&queue->tx))
+ napi_schedule(&queue->napi);
return IRQ_HANDLED;
}
-static int xenvif_poll(struct napi_struct *napi, int budget)
+int xenvif_poll(struct napi_struct *napi, int budget)
{
- struct xenvif *vif = container_of(napi, struct xenvif, napi);
+ struct xenvif_queue *queue = container_of(napi, struct xenvif_queue,
napi);
int work_done;
- work_done = xenvif_tx_action(vif, budget);
+ work_done = xenvif_tx_action(queue, budget);
if (work_done < budget) {
int more_to_do = 0;
@@ -86,7 +95,7 @@ static int xenvif_poll(struct napi_struct *napi, int budget)
local_irq_save(flags);
- RING_FINAL_CHECK_FOR_REQUESTS(&vif->tx, more_to_do);
+ RING_FINAL_CHECK_FOR_REQUESTS(&queue->tx, more_to_do);
if (!more_to_do)
__napi_complete(napi);
@@ -98,9 +107,9 @@ static int xenvif_poll(struct napi_struct *napi, int budget)
static irqreturn_t xenvif_rx_interrupt(int irq, void *dev_id)
{
- struct xenvif *vif = dev_id;
+ struct xenvif_queue *queue = dev_id;
- xenvif_kick_thread(vif);
+ xenvif_kick_thread(queue);
return IRQ_HANDLED;
}
@@ -113,15 +122,48 @@ static irqreturn_t xenvif_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}
+static u16 xenvif_select_queue(struct net_device *dev, struct sk_buff *skb,
+ void *accel_priv)
+{
+ struct xenvif *vif = netdev_priv(dev);
+ u32 hash;
+ u16 queue_index;
+
+ /* First, check if there is only one queue to optimise the
+ * single-queue or old frontend scenario.
+ */
+ if (vif->num_queues == 1) {
+ queue_index = 0;
+ } else {
+ /* Use skb_get_hash to obtain an L4 hash if available */
+ hash = skb_get_hash(skb);
+ queue_index = (u16) (((u64)hash * vif->num_queues) >> 32);
+ }
+
+ return queue_index;
+}
+
static int xenvif_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct xenvif *vif = netdev_priv(dev);
+ struct xenvif_queue *queue = NULL;
+ u16 index;
int min_slots_needed;
BUG_ON(skb->dev != dev);
+ /* Drop the packet if queues are not set up */
+ if (vif->num_queues < 1)
+ goto drop;
+
+ /* Obtain the queue to be used to transmit this packet */
+ index = skb_get_queue_mapping(skb);
+ if (index >= vif->num_queues)
+ index = 0; /* Fall back to queue 0 if out of range */
+ queue = &vif->queues[index];
+
/* Drop the packet if vif is not ready */
- if (vif->task == NULL || !xenvif_schedulable(vif))
+ if (queue->task == NULL || !xenvif_schedulable(vif))
goto drop;
/* At best we'll need one slot for the header and one for each
@@ -140,11 +182,11 @@ static int xenvif_start_xmit(struct sk_buff *skb, struct
net_device *dev)
* then turn off the queue to give the ring a chance to
* drain.
*/
- if (!xenvif_rx_ring_slots_available(vif, min_slots_needed))
- xenvif_stop_queue(vif);
+ if (!xenvif_rx_ring_slots_available(queue, min_slots_needed))
+ xenvif_stop_queue(queue);
- skb_queue_tail(&vif->rx_queue, skb);
- xenvif_kick_thread(vif);
+ skb_queue_tail(&queue->rx_queue, skb);
+ xenvif_kick_thread(queue);
return NETDEV_TX_OK;
@@ -157,25 +199,58 @@ static int xenvif_start_xmit(struct sk_buff *skb, struct
net_device *dev)
static struct net_device_stats *xenvif_get_stats(struct net_device *dev)
{
struct xenvif *vif = netdev_priv(dev);
+ struct xenvif_queue *queue = NULL;
+ unsigned long rx_bytes = 0;
+ unsigned long rx_packets = 0;
+ unsigned long tx_bytes = 0;
+ unsigned long tx_packets = 0;
+ unsigned int index;
+
+ /* Aggregate tx and rx stats from each queue */
+ for (index = 0; index < vif->num_queues; ++index) {
+ queue = &vif->queues[index];
+ rx_bytes += queue->stats.rx_bytes;
+ rx_packets += queue->stats.rx_packets;
+ tx_bytes += queue->stats.tx_bytes;
+ tx_packets += queue->stats.tx_packets;
+ }
+
+ vif->dev->stats.rx_bytes = rx_bytes;
+ vif->dev->stats.rx_packets = rx_packets;
+ vif->dev->stats.tx_bytes = tx_bytes;
+ vif->dev->stats.tx_packets = tx_packets;
+
return &vif->dev->stats;
}
static void xenvif_up(struct xenvif *vif)
{
- napi_enable(&vif->napi);
- enable_irq(vif->tx_irq);
- if (vif->tx_irq != vif->rx_irq)
- enable_irq(vif->rx_irq);
- xenvif_check_rx_xenvif(vif);
+ struct xenvif_queue *queue = NULL;
+ unsigned int queue_index;
+
+ for (queue_index = 0; queue_index < vif->num_queues; ++queue_index) {
+ queue = &vif->queues[queue_index];
+ napi_enable(&queue->napi);
+ enable_irq(queue->tx_irq);
+ if (queue->tx_irq != queue->rx_irq)
+ enable_irq(queue->rx_irq);
+ xenvif_check_rx_xenvif(queue);
+ }
}
static void xenvif_down(struct xenvif *vif)
{
- napi_disable(&vif->napi);
- disable_irq(vif->tx_irq);
- if (vif->tx_irq != vif->rx_irq)
- disable_irq(vif->rx_irq);
- del_timer_sync(&vif->credit_timeout);
+ struct xenvif_queue *queue = NULL;
+ unsigned int queue_index;
+
+ for (queue_index = 0; queue_index < vif->num_queues; ++queue_index) {
+ queue = &vif->queues[queue_index];
+ napi_disable(&queue->napi);
+ disable_irq(queue->tx_irq);
+ if (queue->tx_irq != queue->rx_irq)
+ disable_irq(queue->rx_irq);
+ del_timer_sync(&queue->credit_timeout);
+ }
}
static int xenvif_open(struct net_device *dev)
@@ -183,7 +258,7 @@ static int xenvif_open(struct net_device *dev)
struct xenvif *vif = netdev_priv(dev);
if (netif_carrier_ok(dev))
xenvif_up(vif);
- netif_start_queue(dev);
+ netif_tx_start_all_queues(dev);
return 0;
}
@@ -192,7 +267,7 @@ static int xenvif_close(struct net_device *dev)
struct xenvif *vif = netdev_priv(dev);
if (netif_carrier_ok(dev))
xenvif_down(vif);
- netif_stop_queue(dev);
+ netif_tx_stop_all_queues(dev);
return 0;
}
@@ -253,7 +328,7 @@ static void xenvif_get_ethtool_stats(struct net_device *dev,
int i;
for (i = 0; i < ARRAY_SIZE(xenvif_stats); i++)
- data[i] = *(unsigned long *)(vif + xenvif_stats[i].offset);
+ data[i] = atomic_read((atomic_t *)vif + xenvif_stats[i].offset);
}
static void xenvif_get_strings(struct net_device *dev, u32 stringset, u8 *
data)
@@ -286,6 +361,7 @@ static const struct net_device_ops xenvif_netdev_ops = {
.ndo_fix_features = xenvif_fix_features,
.ndo_set_mac_address = eth_mac_addr,
.ndo_validate_addr = eth_validate_addr,
+ .ndo_select_queue = xenvif_select_queue,
};
struct xenvif *xenvif_alloc(struct device *parent, domid_t domid,
@@ -295,10 +371,9 @@ struct xenvif *xenvif_alloc(struct device *parent, domid_t
domid,
struct net_device *dev;
struct xenvif *vif;
char name[IFNAMSIZ] = {};
- int i;
snprintf(name, IFNAMSIZ - 1, "vif%u.%u", domid, handle);
- dev = alloc_netdev(sizeof(struct xenvif), name, ether_setup);
+ dev = alloc_netdev_mq(sizeof(struct xenvif), name, ether_setup, 1);
if (dev == NULL) {
pr_warn("Could not allocate netdev for %s\n", name);
return ERR_PTR(-ENOMEM);
@@ -308,24 +383,15 @@ struct xenvif *xenvif_alloc(struct device *parent,
domid_t domid,
vif = netdev_priv(dev);
- vif->grant_copy_op = vmalloc(sizeof(struct gnttab_copy) *
- MAX_GRANT_COPY_OPS);
- if (vif->grant_copy_op == NULL) {
- pr_warn("Could not allocate grant copy space for %s\n", name);
- free_netdev(dev);
- return ERR_PTR(-ENOMEM);
- }
-
vif->domid = domid;
vif->handle = handle;
vif->can_sg = 1;
vif->ip_csum = 1;
vif->dev = dev;
- vif->credit_bytes = vif->remaining_credit = ~0UL;
- vif->credit_usec = 0UL;
- init_timer(&vif->credit_timeout);
- vif->credit_window_start = get_jiffies_64();
+ /* Start out with no queues */
+ vif->num_queues = 0;
+ vif->queues = NULL;
dev->netdev_ops = &xenvif_netdev_ops;
dev->hw_features = NETIF_F_SG |
@@ -336,16 +402,6 @@ struct xenvif *xenvif_alloc(struct device *parent, domid_t
domid,
dev->tx_queue_len = XENVIF_QUEUE_LENGTH;
- skb_queue_head_init(&vif->rx_queue);
- skb_queue_head_init(&vif->tx_queue);
-
- vif->pending_cons = 0;
- vif->pending_prod = MAX_PENDING_REQS;
- for (i = 0; i < MAX_PENDING_REQS; i++)
- vif->pending_ring[i] = i;
- for (i = 0; i < MAX_PENDING_REQS; i++)
- vif->mmap_pages[i] = NULL;
-
/*
* Initialise a dummy MAC address. We choose the numerically
* largest non-broadcast address to prevent the address getting
@@ -355,8 +411,6 @@ struct xenvif *xenvif_alloc(struct device *parent, domid_t
domid,
memset(dev->dev_addr, 0xFF, ETH_ALEN);
dev->dev_addr[0] &= ~0x01;
- netif_napi_add(dev, &vif->napi, xenvif_poll, XENVIF_NAPI_WEIGHT);
-
netif_carrier_off(dev);
err = register_netdev(dev);
@@ -373,85 +427,111 @@ struct xenvif *xenvif_alloc(struct device *parent,
domid_t domid,
return vif;
}
-int xenvif_connect(struct xenvif *vif, unsigned long tx_ring_ref,
+void xenvif_init_queue(struct xenvif_queue *queue)
+{
+ int i;
+
+ queue->credit_bytes = queue->remaining_credit = ~0UL;
+ queue->credit_usec = 0UL;
+ init_timer(&queue->credit_timeout);
+ queue->credit_window_start = get_jiffies_64();
+
+ skb_queue_head_init(&queue->rx_queue);
+ skb_queue_head_init(&queue->tx_queue);
+
+ queue->pending_cons = 0;
+ queue->pending_prod = MAX_PENDING_REQS;
+ for (i = 0; i < MAX_PENDING_REQS; ++i) {
+ queue->pending_ring[i] = i;
+ queue->mmap_pages[i] = NULL;
+ }
+
+ netif_napi_add(queue->vif->dev, &queue->napi, xenvif_poll,
+ XENVIF_NAPI_WEIGHT);
+}
+
+void xenvif_carrier_on(struct xenvif *vif)
+{
+ rtnl_lock();
+ if (!vif->can_sg && vif->dev->mtu > ETH_DATA_LEN)
+ dev_set_mtu(vif->dev, ETH_DATA_LEN);
+ netdev_update_features(vif->dev);
+ netif_carrier_on(vif->dev);
+ if (netif_running(vif->dev))
+ xenvif_up(vif);
+ rtnl_unlock();
+}
+
+int xenvif_connect(struct xenvif_queue *queue, unsigned long tx_ring_ref,
unsigned long rx_ring_ref, unsigned int tx_evtchn,
unsigned int rx_evtchn)
{
struct task_struct *task;
int err = -ENOMEM;
- BUG_ON(vif->tx_irq);
- BUG_ON(vif->task);
+ BUG_ON(queue->tx_irq);
+ BUG_ON(queue->task);
- err = xenvif_map_frontend_rings(vif, tx_ring_ref, rx_ring_ref);
+ err = xenvif_map_frontend_rings(queue, tx_ring_ref, rx_ring_ref);
if (err < 0)
goto err;
- init_waitqueue_head(&vif->wq);
+ init_waitqueue_head(&queue->wq);
if (tx_evtchn == rx_evtchn) {
/* feature-split-event-channels == 0 */
err = bind_interdomain_evtchn_to_irqhandler(
- vif->domid, tx_evtchn, xenvif_interrupt, 0,
- vif->dev->name, vif);
+ queue->vif->domid, tx_evtchn, xenvif_interrupt, 0,
+ queue->name, queue);
if (err < 0)
goto err_unmap;
- vif->tx_irq = vif->rx_irq = err;
- disable_irq(vif->tx_irq);
+ queue->tx_irq = queue->rx_irq = err;
+ disable_irq(queue->tx_irq);
} else {
/* feature-split-event-channels == 1 */
- snprintf(vif->tx_irq_name, sizeof(vif->tx_irq_name),
- "%s-tx", vif->dev->name);
+ snprintf(queue->tx_irq_name, sizeof(queue->tx_irq_name),
+ "%s-tx", queue->name);
err = bind_interdomain_evtchn_to_irqhandler(
- vif->domid, tx_evtchn, xenvif_tx_interrupt, 0,
- vif->tx_irq_name, vif);
+ queue->vif->domid, tx_evtchn, xenvif_tx_interrupt, 0,
+ queue->tx_irq_name, queue);
if (err < 0)
goto err_unmap;
- vif->tx_irq = err;
- disable_irq(vif->tx_irq);
+ queue->tx_irq = err;
+ disable_irq(queue->tx_irq);
- snprintf(vif->rx_irq_name, sizeof(vif->rx_irq_name),
- "%s-rx", vif->dev->name);
+ snprintf(queue->rx_irq_name, sizeof(queue->rx_irq_name),
+ "%s-rx", queue->name);
err = bind_interdomain_evtchn_to_irqhandler(
- vif->domid, rx_evtchn, xenvif_rx_interrupt, 0,
- vif->rx_irq_name, vif);
+ queue->vif->domid, rx_evtchn, xenvif_rx_interrupt, 0,
+ queue->rx_irq_name, queue);
if (err < 0)
goto err_tx_unbind;
- vif->rx_irq = err;
- disable_irq(vif->rx_irq);
+ queue->rx_irq = err;
+ disable_irq(queue->rx_irq);
}
task = kthread_create(xenvif_kthread,
- (void *)vif, "%s", vif->dev->name);
+ (void *)queue, "%s", queue->name);
if (IS_ERR(task)) {
- pr_warn("Could not allocate kthread for %s\n", vif->dev->name);
+ pr_warn("Could not allocate kthread for %s\n", queue->name);
err = PTR_ERR(task);
goto err_rx_unbind;
}
- vif->task = task;
-
- rtnl_lock();
- if (!vif->can_sg && vif->dev->mtu > ETH_DATA_LEN)
- dev_set_mtu(vif->dev, ETH_DATA_LEN);
- netdev_update_features(vif->dev);
- netif_carrier_on(vif->dev);
- if (netif_running(vif->dev))
- xenvif_up(vif);
- rtnl_unlock();
+ queue->task = task;
- wake_up_process(vif->task);
+ wake_up_process(queue->task);
return 0;
err_rx_unbind:
- unbind_from_irqhandler(vif->rx_irq, vif);
- vif->rx_irq = 0;
+ unbind_from_irqhandler(queue->rx_irq, queue);
+ queue->rx_irq = 0;
err_tx_unbind:
- unbind_from_irqhandler(vif->tx_irq, vif);
- vif->tx_irq = 0;
+ unbind_from_irqhandler(queue->tx_irq, queue);
+ queue->tx_irq = 0;
err_unmap:
- xenvif_unmap_frontend_rings(vif);
+ xenvif_unmap_frontend_rings(queue);
err:
module_put(THIS_MODULE);
return err;
@@ -470,34 +550,52 @@ void xenvif_carrier_off(struct xenvif *vif)
void xenvif_disconnect(struct xenvif *vif)
{
+ struct xenvif_queue *queue = NULL;
+ unsigned int queue_index;
+
if (netif_carrier_ok(vif->dev))
xenvif_carrier_off(vif);
- if (vif->task) {
- kthread_stop(vif->task);
- vif->task = NULL;
- }
+ for (queue_index = 0; queue_index < vif->num_queues; ++queue_index) {
+ queue = &vif->queues[queue_index];
- if (vif->tx_irq) {
- if (vif->tx_irq == vif->rx_irq)
- unbind_from_irqhandler(vif->tx_irq, vif);
- else {
- unbind_from_irqhandler(vif->tx_irq, vif);
- unbind_from_irqhandler(vif->rx_irq, vif);
+ if (queue->task) {
+ kthread_stop(queue->task);
+ queue->task = NULL;
}
- vif->tx_irq = 0;
+
+ if (queue->tx_irq) {
+ if (queue->tx_irq == queue->rx_irq)
+ unbind_from_irqhandler(queue->tx_irq, queue);
+ else {
+ unbind_from_irqhandler(queue->tx_irq, queue);
+ unbind_from_irqhandler(queue->rx_irq, queue);
+ }
+ queue->tx_irq = 0;
+ }
+
+ xenvif_unmap_frontend_rings(queue);
}
- xenvif_unmap_frontend_rings(vif);
+
}
void xenvif_free(struct xenvif *vif)
{
- netif_napi_del(&vif->napi);
+ struct xenvif_queue *queue = NULL;
+ unsigned int queue_index;
- unregister_netdev(vif->dev);
+ for (queue_index = 0; queue_index < vif->num_queues; ++queue_index) {
+ queue = &vif->queues[queue_index];
+ netif_napi_del(&queue->napi);
+ }
- vfree(vif->grant_copy_op);
+ /* Free the array of queues */
+ vfree(vif->queues);
+ vif->num_queues = 0;
+ vif->queues = 0;
+
+ unregister_netdev(vif->dev);
free_netdev(vif->dev);
module_put(THIS_MODULE);
diff --git a/drivers/net/xen-netback/netback.c
b/drivers/net/xen-netback/netback.c
index e5284bc..46b2f5b 100644
--- a/drivers/net/xen-netback/netback.c
+++ b/drivers/net/xen-netback/netback.c
@@ -75,38 +75,38 @@ module_param(fatal_skb_slots, uint, 0444);
* one or more merged tx requests, otherwise it is the continuation of
* previous tx request.
*/
-static inline int pending_tx_is_head(struct xenvif *vif, RING_IDX idx)
+static inline int pending_tx_is_head(struct xenvif_queue *queue, RING_IDX idx)
{
- return vif->pending_tx_info[idx].head != INVALID_PENDING_RING_IDX;
+ return queue->pending_tx_info[idx].head != INVALID_PENDING_RING_IDX;
}
-static void xenvif_idx_release(struct xenvif *vif, u16 pending_idx,
+static void xenvif_idx_release(struct xenvif_queue *queue, u16 pending_idx,
u8 status);
-static void make_tx_response(struct xenvif *vif,
+static void make_tx_response(struct xenvif_queue *queue,
struct xen_netif_tx_request *txp,
s8 st);
-static inline int tx_work_todo(struct xenvif *vif);
-static inline int rx_work_todo(struct xenvif *vif);
+static inline int tx_work_todo(struct xenvif_queue *queue);
+static inline int rx_work_todo(struct xenvif_queue *queue);
-static struct xen_netif_rx_response *make_rx_response(struct xenvif *vif,
+static struct xen_netif_rx_response *make_rx_response(struct xenvif_queue
*queue,
u16 id,
s8 st,
u16 offset,
u16 size,
u16 flags);
-static inline unsigned long idx_to_pfn(struct xenvif *vif,
+static inline unsigned long idx_to_pfn(struct xenvif_queue *queue,
u16 idx)
{
- return page_to_pfn(vif->mmap_pages[idx]);
+ return page_to_pfn(queue->mmap_pages[idx]);
}
-static inline unsigned long idx_to_kaddr(struct xenvif *vif,
+static inline unsigned long idx_to_kaddr(struct xenvif_queue *queue,
u16 idx)
{
- return (unsigned long)pfn_to_kaddr(idx_to_pfn(vif, idx));
+ return (unsigned long)pfn_to_kaddr(idx_to_pfn(queue, idx));
}
/* This is a miniumum size for the linear area to avoid lots of
@@ -131,30 +131,30 @@ static inline pending_ring_idx_t pending_index(unsigned i)
return i & (MAX_PENDING_REQS-1);
}
-static inline pending_ring_idx_t nr_pending_reqs(struct xenvif *vif)
+static inline pending_ring_idx_t nr_pending_reqs(struct xenvif_queue *queue)
{
return MAX_PENDING_REQS -
- vif->pending_prod + vif->pending_cons;
+ queue->pending_prod + queue->pending_cons;
}
-bool xenvif_rx_ring_slots_available(struct xenvif *vif, int needed)
+bool xenvif_rx_ring_slots_available(struct xenvif_queue *queue, int needed)
{
RING_IDX prod, cons;
do {
- prod = vif->rx.sring->req_prod;
- cons = vif->rx.req_cons;
+ prod = queue->rx.sring->req_prod;
+ cons = queue->rx.req_cons;
if (prod - cons >= needed)
return true;
- vif->rx.sring->req_event = prod + 1;
+ queue->rx.sring->req_event = prod + 1;
/* Make sure event is visible before we check prod
* again.
*/
mb();
- } while (vif->rx.sring->req_prod != prod);
+ } while (queue->rx.sring->req_prod != prod);
return false;
}
@@ -208,13 +208,13 @@ struct netrx_pending_operations {
grant_ref_t copy_gref;
};
-static struct xenvif_rx_meta *get_next_rx_buffer(struct xenvif *vif,
+static struct xenvif_rx_meta *get_next_rx_buffer(struct xenvif_queue *queue,
struct
netrx_pending_operations *npo)
{
struct xenvif_rx_meta *meta;
struct xen_netif_rx_request *req;
- req = RING_GET_REQUEST(&vif->rx, vif->rx.req_cons++);
+ req = RING_GET_REQUEST(&queue->rx, queue->rx.req_cons++);
meta = npo->meta + npo->meta_prod++;
meta->gso_type = XEN_NETIF_GSO_TYPE_NONE;
@@ -232,7 +232,7 @@ static struct xenvif_rx_meta *get_next_rx_buffer(struct
xenvif *vif,
* Set up the grant operations for this fragment. If it's a flipping
* interface, we also set up the unmap request from here.
*/
-static void xenvif_gop_frag_copy(struct xenvif *vif, struct sk_buff *skb,
+static void xenvif_gop_frag_copy(struct xenvif_queue *queue, struct sk_buff
*skb,
struct netrx_pending_operations *npo,
struct page *page, unsigned long size,
unsigned long offset, int *head)
@@ -267,7 +267,7 @@ static void xenvif_gop_frag_copy(struct xenvif *vif, struct
sk_buff *skb,
*/
BUG_ON(*head);
- meta = get_next_rx_buffer(vif, npo);
+ meta = get_next_rx_buffer(queue, npo);
}
if (npo->copy_off + bytes > MAX_BUFFER_OFFSET)
@@ -281,7 +281,7 @@ static void xenvif_gop_frag_copy(struct xenvif *vif, struct
sk_buff *skb,
copy_gop->source.u.gmfn = virt_to_mfn(page_address(page));
copy_gop->source.offset = offset;
- copy_gop->dest.domid = vif->domid;
+ copy_gop->dest.domid = queue->vif->domid;
copy_gop->dest.offset = npo->copy_off;
copy_gop->dest.u.ref = npo->copy_gref;
@@ -306,8 +306,8 @@ static void xenvif_gop_frag_copy(struct xenvif *vif, struct
sk_buff *skb,
else
gso_type = XEN_NETIF_GSO_TYPE_NONE;
- if (*head && ((1 << gso_type) & vif->gso_mask))
- vif->rx.req_cons++;
+ if (*head && ((1 << gso_type) & queue->vif->gso_mask))
+ queue->rx.req_cons++;
*head = 0; /* There must be something in this buffer now. */
@@ -327,7 +327,8 @@ static void xenvif_gop_frag_copy(struct xenvif *vif, struct
sk_buff *skb,
* frontend-side LRO).
*/
static int xenvif_gop_skb(struct sk_buff *skb,
- struct netrx_pending_operations *npo)
+ struct netrx_pending_operations *npo,
+ struct xenvif_queue *queue)
{
struct xenvif *vif = netdev_priv(skb->dev);
int nr_frags = skb_shinfo(skb)->nr_frags;
@@ -355,7 +356,7 @@ static int xenvif_gop_skb(struct sk_buff *skb,
/* Set up a GSO prefix descriptor, if necessary */
if ((1 << gso_type) & vif->gso_prefix_mask) {
- req = RING_GET_REQUEST(&vif->rx, vif->rx.req_cons++);
+ req = RING_GET_REQUEST(&queue->rx, queue->rx.req_cons++);
meta = npo->meta + npo->meta_prod++;
meta->gso_type = gso_type;
meta->gso_size = gso_size;
@@ -363,7 +364,7 @@ static int xenvif_gop_skb(struct sk_buff *skb,
meta->id = req->id;
}
- req = RING_GET_REQUEST(&vif->rx, vif->rx.req_cons++);
+ req = RING_GET_REQUEST(&queue->rx, queue->rx.req_cons++);
meta = npo->meta + npo->meta_prod++;
if ((1 << gso_type) & vif->gso_mask) {
@@ -387,13 +388,13 @@ static int xenvif_gop_skb(struct sk_buff *skb,
if (data + len > skb_tail_pointer(skb))
len = skb_tail_pointer(skb) - data;
- xenvif_gop_frag_copy(vif, skb, npo,
+ xenvif_gop_frag_copy(queue, skb, npo,
virt_to_page(data), len, offset, &head);
data += len;
}
for (i = 0; i < nr_frags; i++) {
- xenvif_gop_frag_copy(vif, skb, npo,
+ xenvif_gop_frag_copy(queue, skb, npo,
skb_frag_page(&skb_shinfo(skb)->frags[i]),
skb_frag_size(&skb_shinfo(skb)->frags[i]),
skb_shinfo(skb)->frags[i].page_offset,
@@ -429,7 +430,7 @@ static int xenvif_check_gop(struct xenvif *vif, int
nr_meta_slots,
return status;
}
-static void xenvif_add_frag_responses(struct xenvif *vif, int status,
+static void xenvif_add_frag_responses(struct xenvif_queue *queue, int status,
struct xenvif_rx_meta *meta,
int nr_meta_slots)
{
@@ -450,7 +451,7 @@ static void xenvif_add_frag_responses(struct xenvif *vif,
int status,
flags = XEN_NETRXF_more_data;
offset = 0;
- make_rx_response(vif, meta[i].id, status, offset,
+ make_rx_response(queue, meta[i].id, status, offset,
meta[i].size, flags);
}
}
@@ -459,12 +460,12 @@ struct skb_cb_overlay {
int meta_slots_used;
};
-void xenvif_kick_thread(struct xenvif *vif)
+void xenvif_kick_thread(struct xenvif_queue *queue)
{
- wake_up(&vif->wq);
+ wake_up(&queue->wq);
}
-static void xenvif_rx_action(struct xenvif *vif)
+static void xenvif_rx_action(struct xenvif_queue *queue)
{
s8 status;
u16 flags;
@@ -478,13 +479,13 @@ static void xenvif_rx_action(struct xenvif *vif)
bool need_to_notify = false;
struct netrx_pending_operations npo = {
- .copy = vif->grant_copy_op,
- .meta = vif->meta,
+ .copy = queue->grant_copy_op,
+ .meta = queue->meta,
};
skb_queue_head_init(&rxq);
- while ((skb = skb_dequeue(&vif->rx_queue)) != NULL) {
+ while ((skb = skb_dequeue(&queue->rx_queue)) != NULL) {
RING_IDX max_slots_needed;
int i;
@@ -505,41 +506,41 @@ static void xenvif_rx_action(struct xenvif *vif)
max_slots_needed++;
/* If the skb may not fit then bail out now */
- if (!xenvif_rx_ring_slots_available(vif, max_slots_needed)) {
- skb_queue_head(&vif->rx_queue, skb);
+ if (!xenvif_rx_ring_slots_available(queue, max_slots_needed)) {
+ skb_queue_head(&queue->rx_queue, skb);
need_to_notify = true;
- vif->rx_last_skb_slots = max_slots_needed;
+ queue->rx_last_skb_slots = max_slots_needed;
break;
} else
- vif->rx_last_skb_slots = 0;
+ queue->rx_last_skb_slots = 0;
sco = (struct skb_cb_overlay *)skb->cb;
- sco->meta_slots_used = xenvif_gop_skb(skb, &npo);
+ sco->meta_slots_used = xenvif_gop_skb(skb, &npo, queue);
BUG_ON(sco->meta_slots_used > max_slots_needed);
__skb_queue_tail(&rxq, skb);
}
- BUG_ON(npo.meta_prod > ARRAY_SIZE(vif->meta));
+ BUG_ON(npo.meta_prod > ARRAY_SIZE(queue->meta));
if (!npo.copy_prod)
goto done;
BUG_ON(npo.copy_prod > MAX_GRANT_COPY_OPS);
- gnttab_batch_copy(vif->grant_copy_op, npo.copy_prod);
+ gnttab_batch_copy(queue->grant_copy_op, npo.copy_prod);
while ((skb = __skb_dequeue(&rxq)) != NULL) {
sco = (struct skb_cb_overlay *)skb->cb;
- if ((1 << vif->meta[npo.meta_cons].gso_type) &
- vif->gso_prefix_mask) {
- resp = RING_GET_RESPONSE(&vif->rx,
- vif->rx.rsp_prod_pvt++);
+ if ((1 << queue->meta[npo.meta_cons].gso_type) &
+ queue->vif->gso_prefix_mask) {
+ resp = RING_GET_RESPONSE(&queue->rx,
+ queue->rx.rsp_prod_pvt++);
resp->flags = XEN_NETRXF_gso_prefix |
XEN_NETRXF_more_data;
- resp->offset = vif->meta[npo.meta_cons].gso_size;
- resp->id = vif->meta[npo.meta_cons].id;
+ resp->offset = queue->meta[npo.meta_cons].gso_size;
+ resp->id = queue->meta[npo.meta_cons].id;
resp->status = sco->meta_slots_used;
npo.meta_cons++;
@@ -547,10 +548,10 @@ static void xenvif_rx_action(struct xenvif *vif)
}
- vif->dev->stats.tx_bytes += skb->len;
- vif->dev->stats.tx_packets++;
+ queue->stats.tx_bytes += skb->len;
+ queue->stats.tx_packets++;
- status = xenvif_check_gop(vif, sco->meta_slots_used, &npo);
+ status = xenvif_check_gop(queue->vif, sco->meta_slots_used,
&npo);
if (sco->meta_slots_used == 1)
flags = 0;
@@ -564,22 +565,22 @@ static void xenvif_rx_action(struct xenvif *vif)
flags |= XEN_NETRXF_data_validated;
offset = 0;
- resp = make_rx_response(vif, vif->meta[npo.meta_cons].id,
+ resp = make_rx_response(queue, queue->meta[npo.meta_cons].id,
status, offset,
- vif->meta[npo.meta_cons].size,
+ queue->meta[npo.meta_cons].size,
flags);
- if ((1 << vif->meta[npo.meta_cons].gso_type) &
- vif->gso_mask) {
+ if ((1 << queue->meta[npo.meta_cons].gso_type) &
+ queue->vif->gso_mask) {
struct xen_netif_extra_info *gso =
(struct xen_netif_extra_info *)
- RING_GET_RESPONSE(&vif->rx,
- vif->rx.rsp_prod_pvt++);
+ RING_GET_RESPONSE(&queue->rx,
+ queue->rx.rsp_prod_pvt++);
resp->flags |= XEN_NETRXF_extra_info;
- gso->u.gso.type = vif->meta[npo.meta_cons].gso_type;
- gso->u.gso.size = vif->meta[npo.meta_cons].gso_size;
+ gso->u.gso.type = queue->meta[npo.meta_cons].gso_type;
+ gso->u.gso.size = queue->meta[npo.meta_cons].gso_size;
gso->u.gso.pad = 0;
gso->u.gso.features = 0;
@@ -587,11 +588,11 @@ static void xenvif_rx_action(struct xenvif *vif)
gso->flags = 0;
}
- xenvif_add_frag_responses(vif, status,
- vif->meta + npo.meta_cons + 1,
+ xenvif_add_frag_responses(queue, status,
+ queue->meta + npo.meta_cons + 1,
sco->meta_slots_used);
- RING_PUSH_RESPONSES_AND_CHECK_NOTIFY(&vif->rx, ret);
+ RING_PUSH_RESPONSES_AND_CHECK_NOTIFY(&queue->rx, ret);
need_to_notify |= !!ret;
@@ -601,20 +602,20 @@ static void xenvif_rx_action(struct xenvif *vif)
done:
if (need_to_notify)
- notify_remote_via_irq(vif->rx_irq);
+ notify_remote_via_irq(queue->rx_irq);
}
-void xenvif_check_rx_xenvif(struct xenvif *vif)
+void xenvif_check_rx_xenvif(struct xenvif_queue *queue)
{
int more_to_do;
- RING_FINAL_CHECK_FOR_REQUESTS(&vif->tx, more_to_do);
+ RING_FINAL_CHECK_FOR_REQUESTS(&queue->tx, more_to_do);
if (more_to_do)
- napi_schedule(&vif->napi);
+ napi_schedule(&queue->napi);
}
-static void tx_add_credit(struct xenvif *vif)
+static void tx_add_credit(struct xenvif_queue *queue)
{
unsigned long max_burst, max_credit;
@@ -622,37 +623,37 @@ static void tx_add_credit(struct xenvif *vif)
* Allow a burst big enough to transmit a jumbo packet of up to 128kB.
* Otherwise the interface can seize up due to insufficient credit.
*/
- max_burst = RING_GET_REQUEST(&vif->tx, vif->tx.req_cons)->size;
+ max_burst = RING_GET_REQUEST(&queue->tx, queue->tx.req_cons)->size;
max_burst = min(max_burst, 131072UL);
- max_burst = max(max_burst, vif->credit_bytes);
+ max_burst = max(max_burst, queue->credit_bytes);
/* Take care that adding a new chunk of credit doesn't wrap to zero. */
- max_credit = vif->remaining_credit + vif->credit_bytes;
- if (max_credit < vif->remaining_credit)
+ max_credit = queue->remaining_credit + queue->credit_bytes;
+ if (max_credit < queue->remaining_credit)
max_credit = ULONG_MAX; /* wrapped: clamp to ULONG_MAX */
- vif->remaining_credit = min(max_credit, max_burst);
+ queue->remaining_credit = min(max_credit, max_burst);
}
static void tx_credit_callback(unsigned long data)
{
- struct xenvif *vif = (struct xenvif *)data;
- tx_add_credit(vif);
- xenvif_check_rx_xenvif(vif);
+ struct xenvif_queue *queue = (struct xenvif_queue *)data;
+ tx_add_credit(queue);
+ xenvif_check_rx_xenvif(queue);
}
-static void xenvif_tx_err(struct xenvif *vif,
+static void xenvif_tx_err(struct xenvif_queue *queue,
struct xen_netif_tx_request *txp, RING_IDX end)
{
- RING_IDX cons = vif->tx.req_cons;
+ RING_IDX cons = queue->tx.req_cons;
do {
- make_tx_response(vif, txp, XEN_NETIF_RSP_ERROR);
+ make_tx_response(queue, txp, XEN_NETIF_RSP_ERROR);
if (cons == end)
break;
- txp = RING_GET_REQUEST(&vif->tx, cons++);
+ txp = RING_GET_REQUEST(&queue->tx, cons++);
} while (1);
- vif->tx.req_cons = cons;
+ queue->tx.req_cons = cons;
}
static void xenvif_fatal_tx_err(struct xenvif *vif)
@@ -661,12 +662,12 @@ static void xenvif_fatal_tx_err(struct xenvif *vif)
xenvif_carrier_off(vif);
}
-static int xenvif_count_requests(struct xenvif *vif,
+static int xenvif_count_requests(struct xenvif_queue *queue,
struct xen_netif_tx_request *first,
struct xen_netif_tx_request *txp,
int work_to_do)
{
- RING_IDX cons = vif->tx.req_cons;
+ RING_IDX cons = queue->tx.req_cons;
int slots = 0;
int drop_err = 0;
int more_data;
@@ -678,10 +679,10 @@ static int xenvif_count_requests(struct xenvif *vif,
struct xen_netif_tx_request dropped_tx = { 0 };
if (slots >= work_to_do) {
- netdev_err(vif->dev,
+ netdev_err(queue->vif->dev,
"Asked for %d slots but exceeds this
limit\n",
work_to_do);
- xenvif_fatal_tx_err(vif);
+ xenvif_fatal_tx_err(queue->vif);
return -ENODATA;
}
@@ -689,10 +690,10 @@ static int xenvif_count_requests(struct xenvif *vif,
* considered malicious.
*/
if (unlikely(slots >= fatal_skb_slots)) {
- netdev_err(vif->dev,
+ netdev_err(queue->vif->dev,
"Malicious frontend using %d slots,
threshold %u\n",
slots, fatal_skb_slots);
- xenvif_fatal_tx_err(vif);
+ xenvif_fatal_tx_err(queue->vif);
return -E2BIG;
}
@@ -705,7 +706,7 @@ static int xenvif_count_requests(struct xenvif *vif,
*/
if (!drop_err && slots >= XEN_NETBK_LEGACY_SLOTS_MAX) {
if (net_ratelimit())
- netdev_dbg(vif->dev,
+ netdev_dbg(queue->vif->dev,
"Too many slots (%d) exceeding limit
(%d), dropping packet\n",
slots, XEN_NETBK_LEGACY_SLOTS_MAX);
drop_err = -E2BIG;
@@ -714,7 +715,7 @@ static int xenvif_count_requests(struct xenvif *vif,
if (drop_err)
txp = &dropped_tx;
- memcpy(txp, RING_GET_REQUEST(&vif->tx, cons + slots),
+ memcpy(txp, RING_GET_REQUEST(&queue->tx, cons + slots),
sizeof(*txp));
/* If the guest submitted a frame >= 64 KiB then
@@ -728,7 +729,7 @@ static int xenvif_count_requests(struct xenvif *vif,
*/
if (!drop_err && txp->size > first->size) {
if (net_ratelimit())
- netdev_dbg(vif->dev,
+ netdev_dbg(queue->vif->dev,
"Invalid tx request, slot size %u >
remaining size %u\n",
txp->size, first->size);
drop_err = -EIO;
@@ -738,9 +739,9 @@ static int xenvif_count_requests(struct xenvif *vif,
slots++;
if (unlikely((txp->offset + txp->size) > PAGE_SIZE)) {
- netdev_err(vif->dev, "Cross page boundary, txp->offset:
%x, size: %u\n",
+ netdev_err(queue->vif->dev, "Cross page boundary,
txp->offset: %x, size: %u\n",
txp->offset, txp->size);
- xenvif_fatal_tx_err(vif);
+ xenvif_fatal_tx_err(queue->vif);
return -EINVAL;
}
@@ -752,14 +753,14 @@ static int xenvif_count_requests(struct xenvif *vif,
} while (more_data);
if (drop_err) {
- xenvif_tx_err(vif, first, cons + slots);
+ xenvif_tx_err(queue, first, cons + slots);
return drop_err;
}
return slots;
}
-static struct page *xenvif_alloc_page(struct xenvif *vif,
+static struct page *xenvif_alloc_page(struct xenvif_queue *queue,
u16 pending_idx)
{
struct page *page;
@@ -767,12 +768,12 @@ static struct page *xenvif_alloc_page(struct xenvif *vif,
page = alloc_page(GFP_ATOMIC|__GFP_COLD);
if (!page)
return NULL;
- vif->mmap_pages[pending_idx] = page;
+ queue->mmap_pages[pending_idx] = page;
return page;
}
-static struct gnttab_copy *xenvif_get_requests(struct xenvif *vif,
+static struct gnttab_copy *xenvif_get_requests(struct xenvif_queue *queue,
struct sk_buff *skb,
struct xen_netif_tx_request *txp,
struct gnttab_copy *gop)
@@ -803,7 +804,7 @@ static struct gnttab_copy *xenvif_get_requests(struct
xenvif *vif,
for (shinfo->nr_frags = slot = start; slot < nr_slots;
shinfo->nr_frags++) {
struct pending_tx_info *pending_tx_info =
- vif->pending_tx_info;
+ queue->pending_tx_info;
page = alloc_page(GFP_ATOMIC|__GFP_COLD);
if (!page)
@@ -815,7 +816,7 @@ static struct gnttab_copy *xenvif_get_requests(struct
xenvif *vif,
gop->flags = GNTCOPY_source_gref;
gop->source.u.ref = txp->gref;
- gop->source.domid = vif->domid;
+ gop->source.domid = queue->vif->domid;
gop->source.offset = txp->offset;
gop->dest.domid = DOMID_SELF;
@@ -840,9 +841,9 @@ static struct gnttab_copy *xenvif_get_requests(struct
xenvif *vif,
gop->len = txp->size;
dst_offset += gop->len;
- index = pending_index(vif->pending_cons++);
+ index = pending_index(queue->pending_cons++);
- pending_idx = vif->pending_ring[index];
+ pending_idx = queue->pending_ring[index];
memcpy(&pending_tx_info[pending_idx].req, txp,
sizeof(*txp));
@@ -851,7 +852,7 @@ static struct gnttab_copy *xenvif_get_requests(struct
xenvif *vif,
* fields for head tx req will be set
* to correct values after the loop.
*/
- vif->mmap_pages[pending_idx] = (void *)(~0UL);
+ queue->mmap_pages[pending_idx] = (void *)(~0UL);
pending_tx_info[pending_idx].head =
INVALID_PENDING_RING_IDX;
@@ -871,7 +872,7 @@ static struct gnttab_copy *xenvif_get_requests(struct
xenvif *vif,
first->req.offset = 0;
first->req.size = dst_offset;
first->head = start_idx;
- vif->mmap_pages[head_idx] = page;
+ queue->mmap_pages[head_idx] = page;
frag_set_pending_idx(&frags[shinfo->nr_frags], head_idx);
}
@@ -881,18 +882,18 @@ static struct gnttab_copy *xenvif_get_requests(struct
xenvif *vif,
err:
/* Unwind, freeing all pages and sending error responses. */
while (shinfo->nr_frags-- > start) {
- xenvif_idx_release(vif,
+ xenvif_idx_release(queue,
frag_get_pending_idx(&frags[shinfo->nr_frags]),
XEN_NETIF_RSP_ERROR);
}
/* The head too, if necessary. */
if (start)
- xenvif_idx_release(vif, pending_idx, XEN_NETIF_RSP_ERROR);
+ xenvif_idx_release(queue, pending_idx, XEN_NETIF_RSP_ERROR);
return NULL;
}
-static int xenvif_tx_check_gop(struct xenvif *vif,
+static int xenvif_tx_check_gop(struct xenvif_queue *queue,
struct sk_buff *skb,
struct gnttab_copy **gopp)
{
@@ -907,7 +908,7 @@ static int xenvif_tx_check_gop(struct xenvif *vif,
/* Check status of header. */
err = gop->status;
if (unlikely(err))
- xenvif_idx_release(vif, pending_idx, XEN_NETIF_RSP_ERROR);
+ xenvif_idx_release(queue, pending_idx, XEN_NETIF_RSP_ERROR);
/* Skip first skb fragment if it is on same page as header fragment. */
start = (frag_get_pending_idx(&shinfo->frags[0]) == pending_idx);
@@ -917,7 +918,7 @@ static int xenvif_tx_check_gop(struct xenvif *vif,
pending_ring_idx_t head;
pending_idx = frag_get_pending_idx(&shinfo->frags[i]);
- tx_info = &vif->pending_tx_info[pending_idx];
+ tx_info = &queue->pending_tx_info[pending_idx];
head = tx_info->head;
/* Check error status: if okay then remember grant handle. */
@@ -925,19 +926,19 @@ static int xenvif_tx_check_gop(struct xenvif *vif,
newerr = (++gop)->status;
if (newerr)
break;
- peek = vif->pending_ring[pending_index(++head)];
- } while (!pending_tx_is_head(vif, peek));
+ peek = queue->pending_ring[pending_index(++head)];
+ } while (!pending_tx_is_head(queue, peek));
if (likely(!newerr)) {
/* Had a previous error? Invalidate this fragment. */
if (unlikely(err))
- xenvif_idx_release(vif, pending_idx,
+ xenvif_idx_release(queue, pending_idx,
XEN_NETIF_RSP_OKAY);
continue;
}
/* Error on this fragment: respond to client with an error. */
- xenvif_idx_release(vif, pending_idx, XEN_NETIF_RSP_ERROR);
+ xenvif_idx_release(queue, pending_idx, XEN_NETIF_RSP_ERROR);
/* Not the first error? Preceding frags already invalidated. */
if (err)
@@ -945,10 +946,10 @@ static int xenvif_tx_check_gop(struct xenvif *vif,
/* First error: invalidate header and preceding fragments. */
pending_idx = *((u16 *)skb->data);
- xenvif_idx_release(vif, pending_idx, XEN_NETIF_RSP_OKAY);
+ xenvif_idx_release(queue, pending_idx, XEN_NETIF_RSP_OKAY);
for (j = start; j < i; j++) {
pending_idx = frag_get_pending_idx(&shinfo->frags[j]);
- xenvif_idx_release(vif, pending_idx,
+ xenvif_idx_release(queue, pending_idx,
XEN_NETIF_RSP_OKAY);
}
@@ -960,7 +961,7 @@ static int xenvif_tx_check_gop(struct xenvif *vif,
return err;
}
-static void xenvif_fill_frags(struct xenvif *vif, struct sk_buff *skb)
+static void xenvif_fill_frags(struct xenvif_queue *queue, struct sk_buff *skb)
{
struct skb_shared_info *shinfo = skb_shinfo(skb);
int nr_frags = shinfo->nr_frags;
@@ -974,46 +975,46 @@ static void xenvif_fill_frags(struct xenvif *vif, struct
sk_buff *skb)
pending_idx = frag_get_pending_idx(frag);
- txp = &vif->pending_tx_info[pending_idx].req;
- page = virt_to_page(idx_to_kaddr(vif, pending_idx));
+ txp = &queue->pending_tx_info[pending_idx].req;
+ page = virt_to_page(idx_to_kaddr(queue, pending_idx));
__skb_fill_page_desc(skb, i, page, txp->offset, txp->size);
skb->len += txp->size;
skb->data_len += txp->size;
skb->truesize += txp->size;
/* Take an extra reference to offset xenvif_idx_release */
- get_page(vif->mmap_pages[pending_idx]);
- xenvif_idx_release(vif, pending_idx, XEN_NETIF_RSP_OKAY);
+ get_page(queue->mmap_pages[pending_idx]);
+ xenvif_idx_release(queue, pending_idx, XEN_NETIF_RSP_OKAY);
}
}
-static int xenvif_get_extras(struct xenvif *vif,
+static int xenvif_get_extras(struct xenvif_queue *queue,
struct xen_netif_extra_info *extras,
int work_to_do)
{
struct xen_netif_extra_info extra;
- RING_IDX cons = vif->tx.req_cons;
+ RING_IDX cons = queue->tx.req_cons;
do {
if (unlikely(work_to_do-- <= 0)) {
- netdev_err(vif->dev, "Missing extra info\n");
- xenvif_fatal_tx_err(vif);
+ netdev_err(queue->vif->dev, "Missing extra info\n");
+ xenvif_fatal_tx_err(queue->vif);
return -EBADR;
}
- memcpy(&extra, RING_GET_REQUEST(&vif->tx, cons),
+ memcpy(&extra, RING_GET_REQUEST(&queue->tx, cons),
sizeof(extra));
if (unlikely(!extra.type ||
extra.type >= XEN_NETIF_EXTRA_TYPE_MAX)) {
- vif->tx.req_cons = ++cons;
- netdev_err(vif->dev,
+ queue->tx.req_cons = ++cons;
+ netdev_err(queue->vif->dev,
"Invalid extra type: %d\n", extra.type);
- xenvif_fatal_tx_err(vif);
+ xenvif_fatal_tx_err(queue->vif);
return -EINVAL;
}
memcpy(&extras[extra.type - 1], &extra, sizeof(extra));
- vif->tx.req_cons = ++cons;
+ queue->tx.req_cons = ++cons;
} while (extra.flags & XEN_NETIF_EXTRA_FLAG_MORE);
return work_to_do;
@@ -1058,7 +1059,7 @@ static int checksum_setup(struct xenvif *vif, struct
sk_buff *skb)
* recalculate the partial checksum.
*/
if (skb->ip_summed != CHECKSUM_PARTIAL && skb_is_gso(skb)) {
- vif->rx_gso_checksum_fixup++;
+ atomic_inc(&vif->rx_gso_checksum_fixup);
skb->ip_summed = CHECKSUM_PARTIAL;
recalculate_partial_csum = true;
}
@@ -1070,31 +1071,31 @@ static int checksum_setup(struct xenvif *vif, struct
sk_buff *skb)
return skb_checksum_setup(skb, recalculate_partial_csum);
}
-static bool tx_credit_exceeded(struct xenvif *vif, unsigned size)
+static bool tx_credit_exceeded(struct xenvif_queue *queue, unsigned size)
{
u64 now = get_jiffies_64();
- u64 next_credit = vif->credit_window_start +
- msecs_to_jiffies(vif->credit_usec / 1000);
+ u64 next_credit = queue->credit_window_start +
+ msecs_to_jiffies(queue->credit_usec / 1000);
/* Timer could already be pending in rare cases. */
- if (timer_pending(&vif->credit_timeout))
+ if (timer_pending(&queue->credit_timeout))
return true;
/* Passed the point where we can replenish credit? */
if (time_after_eq64(now, next_credit)) {
- vif->credit_window_start = now;
- tx_add_credit(vif);
+ queue->credit_window_start = now;
+ tx_add_credit(queue);
}
/* Still too big to send right now? Set a callback. */
- if (size > vif->remaining_credit) {
- vif->credit_timeout.data =
- (unsigned long)vif;
- vif->credit_timeout.function =
+ if (size > queue->remaining_credit) {
+ queue->credit_timeout.data =
+ (unsigned long)queue;
+ queue->credit_timeout.function =
tx_credit_callback;
- mod_timer(&vif->credit_timeout,
+ mod_timer(&queue->credit_timeout,
next_credit);
- vif->credit_window_start = next_credit;
+ queue->credit_window_start = next_credit;
return true;
}
@@ -1102,15 +1103,15 @@ static bool tx_credit_exceeded(struct xenvif *vif,
unsigned size)
return false;
}
-static unsigned xenvif_tx_build_gops(struct xenvif *vif, int budget)
+static unsigned xenvif_tx_build_gops(struct xenvif_queue *queue, int budget)
{
- struct gnttab_copy *gop = vif->tx_copy_ops, *request_gop;
+ struct gnttab_copy *gop = queue->tx_copy_ops, *request_gop;
struct sk_buff *skb;
int ret;
- while ((nr_pending_reqs(vif) + XEN_NETBK_LEGACY_SLOTS_MAX
+ while ((nr_pending_reqs(queue) + XEN_NETBK_LEGACY_SLOTS_MAX
< MAX_PENDING_REQS) &&
- (skb_queue_len(&vif->tx_queue) < budget)) {
+ (skb_queue_len(&queue->tx_queue) < budget)) {
struct xen_netif_tx_request txreq;
struct xen_netif_tx_request txfrags[XEN_NETBK_LEGACY_SLOTS_MAX];
struct page *page;
@@ -1121,69 +1122,69 @@ static unsigned xenvif_tx_build_gops(struct xenvif
*vif, int budget)
unsigned int data_len;
pending_ring_idx_t index;
- if (vif->tx.sring->req_prod - vif->tx.req_cons >
+ if (queue->tx.sring->req_prod - queue->tx.req_cons >
XEN_NETIF_TX_RING_SIZE) {
- netdev_err(vif->dev,
+ netdev_err(queue->vif->dev,
"Impossible number of requests. "
"req_prod %d, req_cons %d, size %ld\n",
- vif->tx.sring->req_prod, vif->tx.req_cons,
+ queue->tx.sring->req_prod,
queue->tx.req_cons,
XEN_NETIF_TX_RING_SIZE);
- xenvif_fatal_tx_err(vif);
+ xenvif_fatal_tx_err(queue->vif);
continue;
}
- work_to_do = RING_HAS_UNCONSUMED_REQUESTS(&vif->tx);
+ work_to_do = RING_HAS_UNCONSUMED_REQUESTS(&queue->tx);
if (!work_to_do)
break;
- idx = vif->tx.req_cons;
+ idx = queue->tx.req_cons;
rmb(); /* Ensure that we see the request before we copy it. */
- memcpy(&txreq, RING_GET_REQUEST(&vif->tx, idx), sizeof(txreq));
+ memcpy(&txreq, RING_GET_REQUEST(&queue->tx, idx),
sizeof(txreq));
/* Credit-based scheduling. */
- if (txreq.size > vif->remaining_credit &&
- tx_credit_exceeded(vif, txreq.size))
+ if (txreq.size > queue->remaining_credit &&
+ tx_credit_exceeded(queue, txreq.size))
break;
- vif->remaining_credit -= txreq.size;
+ queue->remaining_credit -= txreq.size;
work_to_do--;
- vif->tx.req_cons = ++idx;
+ queue->tx.req_cons = ++idx;
memset(extras, 0, sizeof(extras));
if (txreq.flags & XEN_NETTXF_extra_info) {
- work_to_do = xenvif_get_extras(vif, extras,
+ work_to_do = xenvif_get_extras(queue, extras,
work_to_do);
- idx = vif->tx.req_cons;
+ idx = queue->tx.req_cons;
if (unlikely(work_to_do < 0))
break;
}
- ret = xenvif_count_requests(vif, &txreq, txfrags, work_to_do);
+ ret = xenvif_count_requests(queue, &txreq, txfrags, work_to_do);
if (unlikely(ret < 0))
break;
idx += ret;
if (unlikely(txreq.size < ETH_HLEN)) {
- netdev_dbg(vif->dev,
+ netdev_dbg(queue->vif->dev,
"Bad packet size: %d\n", txreq.size);
- xenvif_tx_err(vif, &txreq, idx);
+ xenvif_tx_err(queue, &txreq, idx);
break;
}
/* No crossing a page as the payload mustn't fragment. */
if (unlikely((txreq.offset + txreq.size) > PAGE_SIZE)) {
- netdev_err(vif->dev,
+ netdev_err(queue->vif->dev,
"txreq.offset: %x, size: %u, end: %lu\n",
txreq.offset, txreq.size,
(txreq.offset&~PAGE_MASK) + txreq.size);
- xenvif_fatal_tx_err(vif);
+ xenvif_fatal_tx_err(queue->vif);
break;
}
- index = pending_index(vif->pending_cons);
- pending_idx = vif->pending_ring[index];
+ index = pending_index(queue->pending_cons);
+ pending_idx = queue->pending_ring[index];
data_len = (txreq.size > PKT_PROT_LEN &&
ret < XEN_NETBK_LEGACY_SLOTS_MAX) ?
@@ -1192,9 +1193,9 @@ static unsigned xenvif_tx_build_gops(struct xenvif *vif,
int budget)
skb = alloc_skb(data_len + NET_SKB_PAD + NET_IP_ALIGN,
GFP_ATOMIC | __GFP_NOWARN);
if (unlikely(skb == NULL)) {
- netdev_dbg(vif->dev,
+ netdev_dbg(queue->vif->dev,
"Can't allocate a skb in start_xmit.\n");
- xenvif_tx_err(vif, &txreq, idx);
+ xenvif_tx_err(queue, &txreq, idx);
break;
}
@@ -1205,7 +1206,7 @@ static unsigned xenvif_tx_build_gops(struct xenvif *vif,
int budget)
struct xen_netif_extra_info *gso;
gso = &extras[XEN_NETIF_EXTRA_TYPE_GSO - 1];
- if (xenvif_set_skb_gso(vif, skb, gso)) {
+ if (xenvif_set_skb_gso(queue->vif, skb, gso)) {
/* Failure in xenvif_set_skb_gso is fatal. */
kfree_skb(skb);
break;
@@ -1213,15 +1214,15 @@ static unsigned xenvif_tx_build_gops(struct xenvif
*vif, int budget)
}
/* XXX could copy straight to head */
- page = xenvif_alloc_page(vif, pending_idx);
+ page = xenvif_alloc_page(queue, pending_idx);
if (!page) {
kfree_skb(skb);
- xenvif_tx_err(vif, &txreq, idx);
+ xenvif_tx_err(queue, &txreq, idx);
break;
}
gop->source.u.ref = txreq.gref;
- gop->source.domid = vif->domid;
+ gop->source.domid = queue->vif->domid;
gop->source.offset = txreq.offset;
gop->dest.u.gmfn = virt_to_mfn(page_address(page));
@@ -1233,9 +1234,9 @@ static unsigned xenvif_tx_build_gops(struct xenvif *vif,
int budget)
gop++;
- memcpy(&vif->pending_tx_info[pending_idx].req,
+ memcpy(&queue->pending_tx_info[pending_idx].req,
&txreq, sizeof(txreq));
- vif->pending_tx_info[pending_idx].head = index;
+ queue->pending_tx_info[pending_idx].head = index;
*((u16 *)skb->data) = pending_idx;
__skb_put(skb, data_len);
@@ -1250,45 +1251,45 @@ static unsigned xenvif_tx_build_gops(struct xenvif
*vif, int budget)
INVALID_PENDING_IDX);
}
- vif->pending_cons++;
+ queue->pending_cons++;
- request_gop = xenvif_get_requests(vif, skb, txfrags, gop);
+ request_gop = xenvif_get_requests(queue, skb, txfrags, gop);
if (request_gop == NULL) {
kfree_skb(skb);
- xenvif_tx_err(vif, &txreq, idx);
+ xenvif_tx_err(queue, &txreq, idx);
break;
}
gop = request_gop;
- __skb_queue_tail(&vif->tx_queue, skb);
+ __skb_queue_tail(&queue->tx_queue, skb);
- vif->tx.req_cons = idx;
+ queue->tx.req_cons = idx;
- if ((gop-vif->tx_copy_ops) >= ARRAY_SIZE(vif->tx_copy_ops))
+ if ((gop - queue->tx_copy_ops) >=
ARRAY_SIZE(queue->tx_copy_ops))
break;
}
- return gop - vif->tx_copy_ops;
+ return gop - queue->tx_copy_ops;
}
-static int xenvif_tx_submit(struct xenvif *vif)
+static int xenvif_tx_submit(struct xenvif_queue *queue)
{
- struct gnttab_copy *gop = vif->tx_copy_ops;
+ struct gnttab_copy *gop = queue->tx_copy_ops;
struct sk_buff *skb;
int work_done = 0;
- while ((skb = __skb_dequeue(&vif->tx_queue)) != NULL) {
+ while ((skb = __skb_dequeue(&queue->tx_queue)) != NULL) {
struct xen_netif_tx_request *txp;
u16 pending_idx;
unsigned data_len;
pending_idx = *((u16 *)skb->data);
- txp = &vif->pending_tx_info[pending_idx].req;
+ txp = &queue->pending_tx_info[pending_idx].req;
/* Check the remap error code. */
- if (unlikely(xenvif_tx_check_gop(vif, skb, &gop))) {
- netdev_dbg(vif->dev, "netback grant failed.\n");
+ if (unlikely(xenvif_tx_check_gop(queue, skb, &gop))) {
+ netdev_dbg(queue->vif->dev, "netback grant failed.\n");
skb_shinfo(skb)->nr_frags = 0;
kfree_skb(skb);
continue;
@@ -1296,7 +1297,7 @@ static int xenvif_tx_submit(struct xenvif *vif)
data_len = skb->len;
memcpy(skb->data,
- (void *)(idx_to_kaddr(vif, pending_idx)|txp->offset),
+ (void *)(idx_to_kaddr(queue, pending_idx)|txp->offset),
data_len);
if (data_len < txp->size) {
/* Append the packet payload as a fragment. */
@@ -1304,7 +1305,7 @@ static int xenvif_tx_submit(struct xenvif *vif)
txp->size -= data_len;
} else {
/* Schedule a response immediately. */
- xenvif_idx_release(vif, pending_idx,
+ xenvif_idx_release(queue, pending_idx,
XEN_NETIF_RSP_OKAY);
}
@@ -1313,19 +1314,19 @@ static int xenvif_tx_submit(struct xenvif *vif)
else if (txp->flags & XEN_NETTXF_data_validated)
skb->ip_summed = CHECKSUM_UNNECESSARY;
- xenvif_fill_frags(vif, skb);
+ xenvif_fill_frags(queue, skb);
if (skb_is_nonlinear(skb) && skb_headlen(skb) < PKT_PROT_LEN) {
int target = min_t(int, skb->len, PKT_PROT_LEN);
__pskb_pull_tail(skb, target - skb_headlen(skb));
}
- skb->dev = vif->dev;
+ skb->dev = queue->vif->dev;
skb->protocol = eth_type_trans(skb, skb->dev);
skb_reset_network_header(skb);
- if (checksum_setup(vif, skb)) {
- netdev_dbg(vif->dev,
+ if (checksum_setup(queue->vif, skb)) {
+ netdev_dbg(queue->vif->dev,
"Can't setup checksum in net_tx_action\n");
kfree_skb(skb);
continue;
@@ -1347,8 +1348,8 @@ static int xenvif_tx_submit(struct xenvif *vif)
DIV_ROUND_UP(skb->len - hdrlen, mss);
}
- vif->dev->stats.rx_bytes += skb->len;
- vif->dev->stats.rx_packets++;
+ queue->stats.rx_bytes += skb->len;
+ queue->stats.rx_packets++;
work_done++;
@@ -1359,53 +1360,53 @@ static int xenvif_tx_submit(struct xenvif *vif)
}
/* Called after netfront has transmitted */
-int xenvif_tx_action(struct xenvif *vif, int budget)
+int xenvif_tx_action(struct xenvif_queue *queue, int budget)
{
unsigned nr_gops;
int work_done;
- if (unlikely(!tx_work_todo(vif)))
+ if (unlikely(!tx_work_todo(queue)))
return 0;
- nr_gops = xenvif_tx_build_gops(vif, budget);
+ nr_gops = xenvif_tx_build_gops(queue, budget);
if (nr_gops == 0)
return 0;
- gnttab_batch_copy(vif->tx_copy_ops, nr_gops);
+ gnttab_batch_copy(queue->tx_copy_ops, nr_gops);
- work_done = xenvif_tx_submit(vif);
+ work_done = xenvif_tx_submit(queue);
return work_done;
}
-static void xenvif_idx_release(struct xenvif *vif, u16 pending_idx,
+static void xenvif_idx_release(struct xenvif_queue *queue, u16 pending_idx,
u8 status)
{
struct pending_tx_info *pending_tx_info;
pending_ring_idx_t head;
u16 peek; /* peek into next tx request */
- BUG_ON(vif->mmap_pages[pending_idx] == (void *)(~0UL));
+ BUG_ON(queue->mmap_pages[pending_idx] == (void *)(~0UL));
/* Already complete? */
- if (vif->mmap_pages[pending_idx] == NULL)
+ if (queue->mmap_pages[pending_idx] == NULL)
return;
- pending_tx_info = &vif->pending_tx_info[pending_idx];
+ pending_tx_info = &queue->pending_tx_info[pending_idx];
head = pending_tx_info->head;
- BUG_ON(!pending_tx_is_head(vif, head));
- BUG_ON(vif->pending_ring[pending_index(head)] != pending_idx);
+ BUG_ON(!pending_tx_is_head(queue, head));
+ BUG_ON(queue->pending_ring[pending_index(head)] != pending_idx);
do {
pending_ring_idx_t index;
pending_ring_idx_t idx = pending_index(head);
- u16 info_idx = vif->pending_ring[idx];
+ u16 info_idx = queue->pending_ring[idx];
- pending_tx_info = &vif->pending_tx_info[info_idx];
- make_tx_response(vif, &pending_tx_info->req, status);
+ pending_tx_info = &queue->pending_tx_info[info_idx];
+ make_tx_response(queue, &pending_tx_info->req, status);
/* Setting any number other than
* INVALID_PENDING_RING_IDX indicates this slot is
@@ -1413,50 +1414,50 @@ static void xenvif_idx_release(struct xenvif *vif, u16
pending_idx,
*/
pending_tx_info->head = 0;
- index = pending_index(vif->pending_prod++);
- vif->pending_ring[index] = vif->pending_ring[info_idx];
+ index = pending_index(queue->pending_prod++);
+ queue->pending_ring[index] = queue->pending_ring[info_idx];
- peek = vif->pending_ring[pending_index(++head)];
+ peek = queue->pending_ring[pending_index(++head)];
- } while (!pending_tx_is_head(vif, peek));
+ } while (!pending_tx_is_head(queue, peek));
- put_page(vif->mmap_pages[pending_idx]);
- vif->mmap_pages[pending_idx] = NULL;
+ put_page(queue->mmap_pages[pending_idx]);
+ queue->mmap_pages[pending_idx] = NULL;
}
-static void make_tx_response(struct xenvif *vif,
+static void make_tx_response(struct xenvif_queue *queue,
struct xen_netif_tx_request *txp,
s8 st)
{
- RING_IDX i = vif->tx.rsp_prod_pvt;
+ RING_IDX i = queue->tx.rsp_prod_pvt;
struct xen_netif_tx_response *resp;
int notify;
- resp = RING_GET_RESPONSE(&vif->tx, i);
+ resp = RING_GET_RESPONSE(&queue->tx, i);
resp->id = txp->id;
resp->status = st;
if (txp->flags & XEN_NETTXF_extra_info)
- RING_GET_RESPONSE(&vif->tx, ++i)->status = XEN_NETIF_RSP_NULL;
+ RING_GET_RESPONSE(&queue->tx, ++i)->status = XEN_NETIF_RSP_NULL;
- vif->tx.rsp_prod_pvt = ++i;
- RING_PUSH_RESPONSES_AND_CHECK_NOTIFY(&vif->tx, notify);
+ queue->tx.rsp_prod_pvt = ++i;
+ RING_PUSH_RESPONSES_AND_CHECK_NOTIFY(&queue->tx, notify);
if (notify)
- notify_remote_via_irq(vif->tx_irq);
+ notify_remote_via_irq(queue->tx_irq);
}
-static struct xen_netif_rx_response *make_rx_response(struct xenvif *vif,
+static struct xen_netif_rx_response *make_rx_response(struct xenvif_queue
*queue,
u16 id,
s8 st,
u16 offset,
u16 size,
u16 flags)
{
- RING_IDX i = vif->rx.rsp_prod_pvt;
+ RING_IDX i = queue->rx.rsp_prod_pvt;
struct xen_netif_rx_response *resp;
- resp = RING_GET_RESPONSE(&vif->rx, i);
+ resp = RING_GET_RESPONSE(&queue->rx, i);
resp->offset = offset;
resp->flags = flags;
resp->id = id;
@@ -1464,39 +1465,39 @@ static struct xen_netif_rx_response
*make_rx_response(struct xenvif *vif,
if (st < 0)
resp->status = (s16)st;
- vif->rx.rsp_prod_pvt = ++i;
+ queue->rx.rsp_prod_pvt = ++i;
return resp;
}
-static inline int rx_work_todo(struct xenvif *vif)
+static inline int rx_work_todo(struct xenvif_queue *queue)
{
- return !skb_queue_empty(&vif->rx_queue) &&
- xenvif_rx_ring_slots_available(vif, vif->rx_last_skb_slots);
+ return !skb_queue_empty(&queue->rx_queue) &&
+ xenvif_rx_ring_slots_available(queue, queue->rx_last_skb_slots);
}
-static inline int tx_work_todo(struct xenvif *vif)
+static inline int tx_work_todo(struct xenvif_queue *queue)
{
- if (likely(RING_HAS_UNCONSUMED_REQUESTS(&vif->tx)) &&
- (nr_pending_reqs(vif) + XEN_NETBK_LEGACY_SLOTS_MAX
+ if (likely(RING_HAS_UNCONSUMED_REQUESTS(&queue->tx)) &&
+ (nr_pending_reqs(queue) + XEN_NETBK_LEGACY_SLOTS_MAX
< MAX_PENDING_REQS))
return 1;
return 0;
}
-void xenvif_unmap_frontend_rings(struct xenvif *vif)
+void xenvif_unmap_frontend_rings(struct xenvif_queue *queue)
{
- if (vif->tx.sring)
- xenbus_unmap_ring_vfree(xenvif_to_xenbus_device(vif),
- vif->tx.sring);
- if (vif->rx.sring)
- xenbus_unmap_ring_vfree(xenvif_to_xenbus_device(vif),
- vif->rx.sring);
+ if (queue->tx.sring)
+ xenbus_unmap_ring_vfree(xenvif_to_xenbus_device(queue->vif),
+ queue->tx.sring);
+ if (queue->rx.sring)
+ xenbus_unmap_ring_vfree(xenvif_to_xenbus_device(queue->vif),
+ queue->rx.sring);
}
-int xenvif_map_frontend_rings(struct xenvif *vif,
+int xenvif_map_frontend_rings(struct xenvif_queue *queue,
grant_ref_t tx_ring_ref,
grant_ref_t rx_ring_ref)
{
@@ -1506,67 +1507,72 @@ int xenvif_map_frontend_rings(struct xenvif *vif,
int err = -ENOMEM;
- err = xenbus_map_ring_valloc(xenvif_to_xenbus_device(vif),
+ err = xenbus_map_ring_valloc(xenvif_to_xenbus_device(queue->vif),
tx_ring_ref, &addr);
if (err)
goto err;
txs = (struct xen_netif_tx_sring *)addr;
- BACK_RING_INIT(&vif->tx, txs, PAGE_SIZE);
+ BACK_RING_INIT(&queue->tx, txs, PAGE_SIZE);
- err = xenbus_map_ring_valloc(xenvif_to_xenbus_device(vif),
+ err = xenbus_map_ring_valloc(xenvif_to_xenbus_device(queue->vif),
rx_ring_ref, &addr);
if (err)
goto err;
rxs = (struct xen_netif_rx_sring *)addr;
- BACK_RING_INIT(&vif->rx, rxs, PAGE_SIZE);
+ BACK_RING_INIT(&queue->rx, rxs, PAGE_SIZE);
return 0;
err:
- xenvif_unmap_frontend_rings(vif);
+ xenvif_unmap_frontend_rings(queue);
return err;
}
-void xenvif_stop_queue(struct xenvif *vif)
+static inline void xenvif_wake_queue(struct xenvif_queue *queue)
{
- if (!vif->can_queue)
- return;
+ struct net_device *dev = queue->vif->dev;
+ netif_tx_wake_queue(netdev_get_tx_queue(dev, queue->id));
+}
- netif_stop_queue(vif->dev);
+static void xenvif_start_queue(struct xenvif_queue *queue)
+{
+ if (xenvif_schedulable(queue->vif))
+ xenvif_wake_queue(queue);
}
-static void xenvif_start_queue(struct xenvif *vif)
+static int xenvif_queue_stopped(struct xenvif_queue *queue)
{
- if (xenvif_schedulable(vif))
- netif_wake_queue(vif->dev);
+ struct net_device *dev = queue->vif->dev;
+ unsigned int id = queue->id;
+ return netif_tx_queue_stopped(netdev_get_tx_queue(dev, id));
}
int xenvif_kthread(void *data)
{
- struct xenvif *vif = data;
+ struct xenvif_queue *queue = data;
struct sk_buff *skb;
while (!kthread_should_stop()) {
- wait_event_interruptible(vif->wq,
- rx_work_todo(vif) ||
+ wait_event_interruptible(queue->wq,
+ rx_work_todo(queue) ||
kthread_should_stop());
if (kthread_should_stop())
break;
- if (!skb_queue_empty(&vif->rx_queue))
- xenvif_rx_action(vif);
+ if (!skb_queue_empty(&queue->rx_queue))
+ xenvif_rx_action(queue);
- if (skb_queue_empty(&vif->rx_queue) &&
- netif_queue_stopped(vif->dev))
- xenvif_start_queue(vif);
+ if (skb_queue_empty(&queue->rx_queue) &&
+ xenvif_queue_stopped(queue))
+ xenvif_start_queue(queue);
cond_resched();
}
/* Bin any remaining skbs */
- while ((skb = skb_dequeue(&vif->rx_queue)) != NULL)
+ while ((skb = skb_dequeue(&queue->rx_queue)) != NULL)
dev_kfree_skb(skb);
return 0;
diff --git a/drivers/net/xen-netback/xenbus.c b/drivers/net/xen-netback/xenbus.c
index 7a206cf..f23ea0a 100644
--- a/drivers/net/xen-netback/xenbus.c
+++ b/drivers/net/xen-netback/xenbus.c
@@ -19,6 +19,7 @@
*/
#include "common.h"
+#include <linux/vmalloc.h>
struct backend_info {
struct xenbus_device *dev;
@@ -34,8 +35,9 @@ struct backend_info {
u8 have_hotplug_status_watch:1;
};
-static int connect_rings(struct backend_info *);
-static void connect(struct backend_info *);
+static int connect_rings(struct backend_info *be, struct xenvif_queue *queue);
+static void connect(struct backend_info *be);
+static int read_xenbus_vif_flags(struct backend_info *be);
static void backend_create_xenvif(struct backend_info *be);
static void unregister_hotplug_status_watch(struct backend_info *be);
static void set_backend_state(struct backend_info *be,
@@ -485,10 +487,9 @@ static void connect(struct backend_info *be)
{
int err;
struct xenbus_device *dev = be->dev;
-
- err = connect_rings(be);
- if (err)
- return;
+ unsigned long credit_bytes, credit_usec;
+ unsigned int queue_index;
+ struct xenvif_queue *queue;
err = xen_net_read_mac(dev, be->vif->fe_dev_addr);
if (err) {
@@ -496,9 +497,30 @@ static void connect(struct backend_info *be)
return;
}
- xen_net_read_rate(dev, &be->vif->credit_bytes,
- &be->vif->credit_usec);
- be->vif->remaining_credit = be->vif->credit_bytes;
+ xen_net_read_rate(dev, &credit_bytes, &credit_usec);
+ read_xenbus_vif_flags(be);
+
+ be->vif->num_queues = 1;
+ be->vif->queues = vzalloc(be->vif->num_queues *
+ sizeof(struct xenvif_queue));
+
+ for (queue_index = 0; queue_index < be->vif->num_queues; ++queue_index)
{
+ queue = &be->vif->queues[queue_index];
+ queue->vif = be->vif;
+ queue->id = queue_index;
+ snprintf(queue->name, sizeof(queue->name), "%s-q%u",
+ be->vif->dev->name, queue->id);
+
+ xenvif_init_queue(queue);
+
+ queue->remaining_credit = credit_bytes;
+
+ err = connect_rings(be, queue);
+ if (err)
+ goto err;
+ }
+
+ xenvif_carrier_on(be->vif);
unregister_hotplug_status_watch(be);
err = xenbus_watch_pathfmt(dev, &be->hotplug_status_watch,
@@ -507,18 +529,24 @@ static void connect(struct backend_info *be)
if (!err)
be->have_hotplug_status_watch = 1;
- netif_wake_queue(be->vif->dev);
+ netif_tx_wake_all_queues(be->vif->dev);
+
+ return;
+
+err:
+ vfree(be->vif->queues);
+ be->vif->queues = NULL;
+ be->vif->num_queues = 0;
+ return;
}
-static int connect_rings(struct backend_info *be)
+static int connect_rings(struct backend_info *be, struct xenvif_queue *queue)
{
- struct xenvif *vif = be->vif;
struct xenbus_device *dev = be->dev;
unsigned long tx_ring_ref, rx_ring_ref;
- unsigned int tx_evtchn, rx_evtchn, rx_copy;
+ unsigned int tx_evtchn, rx_evtchn;
int err;
- int val;
err = xenbus_gather(XBT_NIL, dev->otherend,
"tx-ring-ref", "%lu", &tx_ring_ref,
@@ -546,6 +574,27 @@ static int connect_rings(struct backend_info *be)
rx_evtchn = tx_evtchn;
}
+ /* Map the shared frame, irq etc. */
+ err = xenvif_connect(queue, tx_ring_ref, rx_ring_ref,
+ tx_evtchn, rx_evtchn);
+ if (err) {
+ xenbus_dev_fatal(dev, err,
+ "mapping shared-frames %lu/%lu port tx %u rx
%u",
+ tx_ring_ref, rx_ring_ref,
+ tx_evtchn, rx_evtchn);
+ return err;
+ }
+
+ return 0;
+}
+
+static int read_xenbus_vif_flags(struct backend_info *be)
+{
+ struct xenvif *vif = be->vif;
+ struct xenbus_device *dev = be->dev;
+ unsigned int rx_copy;
+ int err, val;
+
err = xenbus_scanf(XBT_NIL, dev->otherend, "request-rx-copy", "%u",
&rx_copy);
if (err == -ENOENT) {
@@ -621,16 +670,6 @@ static int connect_rings(struct backend_info *be)
val = 0;
vif->ipv6_csum = !!val;
- /* Map the shared frame, irq etc. */
- err = xenvif_connect(vif, tx_ring_ref, rx_ring_ref,
- tx_evtchn, rx_evtchn);
- if (err) {
- xenbus_dev_fatal(dev, err,
- "mapping shared-frames %lu/%lu port tx %u rx
%u",
- tx_ring_ref, rx_ring_ref,
- tx_evtchn, rx_evtchn);
- return err;
- }
return 0;
}
--
1.7.10.4
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel
|
 |
Lists.xenproject.org is hosted with RackSpace, monitoring our |