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Message-ID: <1327934734-8908-7-git-send-email-wei.liu2@citrix.com>
Date: Mon, 30 Jan 2012 14:45:24 +0000
From: Wei Liu <wei.liu2@...rix.com>
To: netdev@...r.kernel.org, xen-devel@...ts.xensource.com
CC: ian.campbell@...rix.com, konrad.wilk@...cle.com,
Wei Liu <wei.liu2@...rix.com>
Subject: [RFC PATCH V3 06/16] netback: melt xen_netbk into xenvif
In the 1:1 model, there is no need to keep xen_netbk and xenvif
separated.
Tested-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Signed-off-by: Wei Liu <wei.liu2@...rix.com>
---
drivers/net/xen-netback/common.h | 36 +++---
drivers/net/xen-netback/interface.c | 36 +++----
drivers/net/xen-netback/netback.c | 213 +++++++++++++----------------------
drivers/net/xen-netback/page_pool.c | 10 +-
drivers/net/xen-netback/page_pool.h | 13 ++-
5 files changed, 122 insertions(+), 186 deletions(-)
diff --git a/drivers/net/xen-netback/common.h b/drivers/net/xen-netback/common.h
index 3b85563..17d4e1a 100644
--- a/drivers/net/xen-netback/common.h
+++ b/drivers/net/xen-netback/common.h
@@ -45,34 +45,29 @@
#include <xen/grant_table.h>
#include <xen/xenbus.h>
+#include "page_pool.h"
+
struct netbk_rx_meta {
int id;
int size;
int gso_size;
};
-#define MAX_PENDING_REQS 256
-
/* Discriminate from any valid pending_idx value. */
#define INVALID_PENDING_IDX 0xFFFF
#define MAX_BUFFER_OFFSET PAGE_SIZE
-struct pending_tx_info {
- struct xen_netif_tx_request req;
-};
-typedef unsigned int pending_ring_idx_t;
+#define XEN_NETIF_TX_RING_SIZE __CONST_RING_SIZE(xen_netif_tx, PAGE_SIZE)
+#define XEN_NETIF_RX_RING_SIZE __CONST_RING_SIZE(xen_netif_rx, PAGE_SIZE)
-struct xen_netbk;
+#define MAX_PENDING_REQS 256
struct xenvif {
/* Unique identifier for this interface. */
domid_t domid;
unsigned int handle;
- /* Reference to netback processing backend. */
- struct xen_netbk *netbk;
-
/* Use NAPI for guest TX */
struct napi_struct napi;
/* Use kthread for guest RX */
@@ -115,6 +110,16 @@ struct xenvif {
/* Miscellaneous private stuff. */
struct net_device *dev;
+
+ struct sk_buff_head rx_queue;
+ struct sk_buff_head tx_queue;
+
+ idx_t mmap_pages[MAX_PENDING_REQS];
+
+ pending_ring_idx_t pending_prod;
+ pending_ring_idx_t pending_cons;
+
+ u16 pending_ring[MAX_PENDING_REQS];
};
static inline struct xenbus_device *xenvif_to_xenbus_device(struct xenvif *vif)
@@ -122,9 +127,6 @@ static inline struct xenbus_device *xenvif_to_xenbus_device(struct xenvif *vif)
return to_xenbus_device(vif->dev->dev.parent);
}
-#define XEN_NETIF_TX_RING_SIZE __CONST_RING_SIZE(xen_netif_tx, PAGE_SIZE)
-#define XEN_NETIF_RX_RING_SIZE __CONST_RING_SIZE(xen_netif_rx, PAGE_SIZE)
-
struct xenvif *xenvif_alloc(struct device *parent,
domid_t domid,
unsigned int handle);
@@ -161,12 +163,8 @@ void xenvif_notify_tx_completion(struct xenvif *vif);
/* Returns number of ring slots required to send an skb to the frontend */
unsigned int xen_netbk_count_skb_slots(struct xenvif *vif, struct sk_buff *skb);
-/* Allocate and free xen_netbk structure */
-struct xen_netbk *xen_netbk_alloc_netbk(struct xenvif *vif);
-void xen_netbk_free_netbk(struct xen_netbk *netbk);
-
-void xen_netbk_tx_action(struct xen_netbk *netbk, int *work_done, int budget);
-void xen_netbk_rx_action(struct xen_netbk *netbk);
+void xen_netbk_tx_action(struct xenvif *vif, int *work_done, int budget);
+void xen_netbk_rx_action(struct xenvif *vif);
int xen_netbk_kthread(void *data);
diff --git a/drivers/net/xen-netback/interface.c b/drivers/net/xen-netback/interface.c
index 7914f60..3c004fa 100644
--- a/drivers/net/xen-netback/interface.c
+++ b/drivers/net/xen-netback/interface.c
@@ -55,9 +55,6 @@ static irqreturn_t xenvif_interrupt(int irq, void *dev_id)
{
struct xenvif *vif = dev_id;
- if (vif->netbk == NULL)
- return IRQ_NONE;
-
if (xenvif_rx_schedulable(vif))
netif_wake_queue(vif->dev);
@@ -72,7 +69,7 @@ static int xenvif_poll(struct napi_struct *napi, int budget)
struct xenvif *vif = container_of(napi, struct xenvif, napi);
int work_done = 0;
- xen_netbk_tx_action(vif->netbk, &work_done, budget);
+ xen_netbk_tx_action(vif, &work_done, budget);
if (work_done < budget) {
int more_to_do = 0;
@@ -95,7 +92,8 @@ static int xenvif_start_xmit(struct sk_buff *skb, struct net_device *dev)
BUG_ON(skb->dev != dev);
- if (vif->netbk == NULL)
+ /* Drop the packet if vif is not ready */
+ if (vif->task == NULL)
goto drop;
/* Drop the packet if the target domain has no receive buffers. */
@@ -257,6 +255,7 @@ struct xenvif *xenvif_alloc(struct device *parent, domid_t domid,
int err;
struct net_device *dev;
struct xenvif *vif;
+ int i;
char name[IFNAMSIZ] = {};
snprintf(name, IFNAMSIZ - 1, "vif%u.%u", domid, handle);
@@ -271,7 +270,6 @@ struct xenvif *xenvif_alloc(struct device *parent, domid_t domid,
vif = netdev_priv(dev);
vif->domid = domid;
vif->handle = handle;
- vif->netbk = NULL;
vif->can_sg = 1;
vif->csum = 1;
@@ -290,6 +288,17 @@ 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] = INVALID_ENTRY;
+
/*
* Initialise a dummy MAC address. We choose the numerically
* largest non-broadcast address to prevent the address getting
@@ -337,14 +346,6 @@ int xenvif_connect(struct xenvif *vif, unsigned long tx_ring_ref,
vif->irq = err;
disable_irq(vif->irq);
- vif->netbk = xen_netbk_alloc_netbk(vif);
- if (!vif->netbk) {
- pr_warn("Could not allocate xen_netbk\n");
- err = -ENOMEM;
- goto err_unbind;
- }
-
-
init_waitqueue_head(&vif->wq);
vif->task = kthread_create(xen_netbk_kthread,
(void *)vif,
@@ -352,7 +353,7 @@ int xenvif_connect(struct xenvif *vif, unsigned long tx_ring_ref,
if (IS_ERR(vif->task)) {
pr_warn("Could not create kthread\n");
err = PTR_ERR(vif->task);
- goto err_free_netbk;
+ goto err_unbind;
}
rtnl_lock();
@@ -367,8 +368,6 @@ int xenvif_connect(struct xenvif *vif, unsigned long tx_ring_ref,
wake_up_process(vif->task);
return 0;
-err_free_netbk:
- xen_netbk_free_netbk(vif->netbk);
err_unbind:
unbind_from_irqhandler(vif->irq, vif);
err_unmap:
@@ -394,9 +393,6 @@ void xenvif_disconnect(struct xenvif *vif)
if (vif->task)
kthread_stop(vif->task);
- if (vif->netbk)
- xen_netbk_free_netbk(vif->netbk);
-
netif_napi_del(&vif->napi);
del_timer_sync(&vif->credit_timeout);
diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c
index 1c68afb..0a52bb1 100644
--- a/drivers/net/xen-netback/netback.c
+++ b/drivers/net/xen-netback/netback.c
@@ -59,28 +59,13 @@ struct gnttab_copy *tx_copy_ops;
struct gnttab_copy *grant_copy_op;
struct netbk_rx_meta *meta;
-
-struct xen_netbk {
- struct sk_buff_head rx_queue;
- struct sk_buff_head tx_queue;
-
- idx_t mmap_pages[MAX_PENDING_REQS];
-
- pending_ring_idx_t pending_prod;
- pending_ring_idx_t pending_cons;
-
- struct xenvif *vif;
-
- u16 pending_ring[MAX_PENDING_REQS];
-};
-
-static void xen_netbk_idx_release(struct xen_netbk *netbk, u16 pending_idx);
+static void xen_netbk_idx_release(struct xenvif *vif, u16 pending_idx);
static void make_tx_response(struct xenvif *vif,
struct xen_netif_tx_request *txp,
s8 st);
-static inline int tx_work_todo(struct xen_netbk *netbk);
-static inline int rx_work_todo(struct xen_netbk *netbk);
+static inline int tx_work_todo(struct xenvif *vif);
+static inline int rx_work_todo(struct xenvif *vif);
static struct xen_netif_rx_response *make_rx_response(struct xenvif *vif,
u16 id,
@@ -89,16 +74,16 @@ static struct xen_netif_rx_response *make_rx_response(struct xenvif *vif,
u16 size,
u16 flags);
-static inline unsigned long idx_to_pfn(struct xen_netbk *netbk,
+static inline unsigned long idx_to_pfn(struct xenvif *vif,
u16 idx)
{
- return page_to_pfn(to_page(netbk->mmap_pages[idx]));
+ return page_to_pfn(to_page(vif->mmap_pages[idx]));
}
-static inline unsigned long idx_to_kaddr(struct xen_netbk *netbk,
+static inline unsigned long idx_to_kaddr(struct xenvif *vif,
u16 idx)
{
- return (unsigned long)pfn_to_kaddr(idx_to_pfn(netbk, idx));
+ return (unsigned long)pfn_to_kaddr(idx_to_pfn(vif, idx));
}
/*
@@ -126,10 +111,10 @@ 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 xen_netbk *netbk)
+static inline pending_ring_idx_t nr_pending_reqs(struct xenvif *vif)
{
return MAX_PENDING_REQS -
- netbk->pending_prod + netbk->pending_cons;
+ vif->pending_prod + vif->pending_cons;
}
static int max_required_rx_slots(struct xenvif *vif)
@@ -316,9 +301,9 @@ static void netbk_gop_frag_copy(struct xenvif *vif, struct sk_buff *skb,
copy_gop->flags = GNTCOPY_dest_gref;
if (foreign) {
struct pending_tx_info *src_pend = to_txinfo(idx);
- struct xen_netbk *rnetbk = to_netbk(idx);
+ struct xenvif *rvif = to_vif(idx);
- copy_gop->source.domid = rnetbk->vif->domid;
+ copy_gop->source.domid = rvif->domid;
copy_gop->source.u.ref = src_pend->req.gref;
copy_gop->flags |= GNTCOPY_source_gref;
} else {
@@ -476,16 +461,13 @@ struct skb_cb_overlay {
int meta_slots_used;
};
-static void xen_netbk_kick_thread(struct xen_netbk *netbk)
+static void xen_netbk_kick_thread(struct xenvif *vif)
{
- struct xenvif *vif = netbk->vif;
-
wake_up(&vif->wq);
}
-void xen_netbk_rx_action(struct xen_netbk *netbk)
+void xen_netbk_rx_action(struct xenvif *vif)
{
- struct xenvif *vif = NULL;
s8 status;
u16 flags;
struct xen_netif_rx_response *resp;
@@ -511,7 +493,7 @@ void xen_netbk_rx_action(struct xen_netbk *netbk)
count = 0;
- while ((skb = skb_dequeue(&netbk->rx_queue)) != NULL) {
+ while ((skb = skb_dequeue(&vif->rx_queue)) != NULL) {
vif = netdev_priv(skb->dev);
nr_frags = skb_shinfo(skb)->nr_frags;
@@ -543,8 +525,6 @@ void xen_netbk_rx_action(struct xen_netbk *netbk)
while ((skb = __skb_dequeue(&rxq)) != NULL) {
sco = (struct skb_cb_overlay *)skb->cb;
- vif = netdev_priv(skb->dev);
-
if (m[npo.meta_cons].gso_size && vif->gso_prefix) {
resp = RING_GET_RESPONSE(&vif->rx,
vif->rx.rsp_prod_pvt++);
@@ -616,8 +596,8 @@ void xen_netbk_rx_action(struct xen_netbk *netbk)
if (need_to_notify)
notify_remote_via_irq(vif->irq);
- if (!skb_queue_empty(&netbk->rx_queue))
- xen_netbk_kick_thread(netbk);
+ if (!skb_queue_empty(&vif->rx_queue))
+ xen_netbk_kick_thread(vif);
put_cpu_ptr(gco);
put_cpu_ptr(m);
@@ -625,11 +605,9 @@ void xen_netbk_rx_action(struct xen_netbk *netbk)
void xen_netbk_queue_tx_skb(struct xenvif *vif, struct sk_buff *skb)
{
- struct xen_netbk *netbk = vif->netbk;
+ skb_queue_tail(&vif->rx_queue, skb);
- skb_queue_tail(&netbk->rx_queue, skb);
-
- xen_netbk_kick_thread(netbk);
+ xen_netbk_kick_thread(vif);
}
void xen_netbk_check_rx_xenvif(struct xenvif *vif)
@@ -728,21 +706,20 @@ static int netbk_count_requests(struct xenvif *vif,
return frags;
}
-static struct page *xen_netbk_alloc_page(struct xen_netbk *netbk,
+static struct page *xen_netbk_alloc_page(struct xenvif *vif,
struct sk_buff *skb,
u16 pending_idx)
{
struct page *page;
int idx;
- page = page_pool_get(netbk, &idx);
+ page = page_pool_get(vif, &idx);
if (!page)
return NULL;
- netbk->mmap_pages[pending_idx] = idx;
+ vif->mmap_pages[pending_idx] = idx;
return page;
}
-static struct gnttab_copy *xen_netbk_get_requests(struct xen_netbk *netbk,
- struct xenvif *vif,
+static struct gnttab_copy *xen_netbk_get_requests(struct xenvif *vif,
struct sk_buff *skb,
struct xen_netif_tx_request *txp,
struct gnttab_copy *gop)
@@ -761,13 +738,13 @@ static struct gnttab_copy *xen_netbk_get_requests(struct xen_netbk *netbk,
int idx;
struct pending_tx_info *pending_tx_info;
- index = pending_index(netbk->pending_cons++);
- pending_idx = netbk->pending_ring[index];
- page = xen_netbk_alloc_page(netbk, skb, pending_idx);
+ index = pending_index(vif->pending_cons++);
+ pending_idx = vif->pending_ring[index];
+ page = xen_netbk_alloc_page(vif, skb, pending_idx);
if (!page)
return NULL;
- idx = netbk->mmap_pages[pending_idx];
+ idx = vif->mmap_pages[pending_idx];
pending_tx_info = to_txinfo(idx);
gop->source.u.ref = txp->gref;
@@ -791,7 +768,7 @@ static struct gnttab_copy *xen_netbk_get_requests(struct xen_netbk *netbk,
return gop;
}
-static int xen_netbk_tx_check_gop(struct xen_netbk *netbk,
+static int xen_netbk_tx_check_gop(struct xenvif *vif,
struct sk_buff *skb,
struct gnttab_copy **gopp)
{
@@ -799,8 +776,6 @@ static int xen_netbk_tx_check_gop(struct xen_netbk *netbk,
u16 pending_idx = *((u16 *)skb->data);
struct pending_tx_info *pending_tx_info;
int idx;
- struct xenvif *vif = netbk->vif;
-
struct xen_netif_tx_request *txp;
struct skb_shared_info *shinfo = skb_shinfo(skb);
int nr_frags = shinfo->nr_frags;
@@ -810,12 +785,12 @@ static int xen_netbk_tx_check_gop(struct xen_netbk *netbk,
err = gop->status;
if (unlikely(err)) {
pending_ring_idx_t index;
- index = pending_index(netbk->pending_prod++);
- idx = netbk->mmap_pages[index];
+ index = pending_index(vif->pending_prod++);
+ idx = vif->mmap_pages[index];
pending_tx_info = to_txinfo(idx);
txp = &pending_tx_info->req;
make_tx_response(vif, txp, XEN_NETIF_RSP_ERROR);
- netbk->pending_ring[index] = pending_idx;
+ vif->pending_ring[index] = pending_idx;
}
/* Skip first skb fragment if it is on same page as header fragment. */
@@ -832,16 +807,16 @@ static int xen_netbk_tx_check_gop(struct xen_netbk *netbk,
if (likely(!newerr)) {
/* Had a previous error? Invalidate this fragment. */
if (unlikely(err))
- xen_netbk_idx_release(netbk, pending_idx);
+ xen_netbk_idx_release(vif, pending_idx);
continue;
}
/* Error on this fragment: respond to client with an error. */
- idx = netbk->mmap_pages[pending_idx];
+ idx = vif->mmap_pages[pending_idx];
txp = &to_txinfo(idx)->req;
make_tx_response(vif, txp, XEN_NETIF_RSP_ERROR);
- index = pending_index(netbk->pending_prod++);
- netbk->pending_ring[index] = pending_idx;
+ index = pending_index(vif->pending_prod++);
+ vif->pending_ring[index] = pending_idx;
/* Not the first error? Preceding frags already invalidated. */
if (err)
@@ -849,10 +824,10 @@ static int xen_netbk_tx_check_gop(struct xen_netbk *netbk,
/* First error: invalidate header and preceding fragments. */
pending_idx = *((u16 *)skb->data);
- xen_netbk_idx_release(netbk, pending_idx);
+ xen_netbk_idx_release(vif, pending_idx);
for (j = start; j < i; j++) {
pending_idx = frag_get_pending_idx(&shinfo->frags[j]);
- xen_netbk_idx_release(netbk, pending_idx);
+ xen_netbk_idx_release(vif, pending_idx);
}
/* Remember the error: invalidate all subsequent fragments. */
@@ -863,7 +838,7 @@ static int xen_netbk_tx_check_gop(struct xen_netbk *netbk,
return err;
}
-static void xen_netbk_fill_frags(struct xen_netbk *netbk, struct sk_buff *skb)
+static void xen_netbk_fill_frags(struct xenvif *vif, struct sk_buff *skb)
{
struct skb_shared_info *shinfo = skb_shinfo(skb);
int nr_frags = shinfo->nr_frags;
@@ -879,11 +854,11 @@ static void xen_netbk_fill_frags(struct xen_netbk *netbk, struct sk_buff *skb)
pending_idx = frag_get_pending_idx(frag);
- idx = netbk->mmap_pages[pending_idx];
+ idx = vif->mmap_pages[pending_idx];
pending_tx_info = to_txinfo(idx);
txp = &pending_tx_info->req;
- page = virt_to_page(idx_to_kaddr(netbk, pending_idx));
+ page = virt_to_page(idx_to_kaddr(vif, pending_idx));
__skb_fill_page_desc(skb, i, page, txp->offset, txp->size);
skb->len += txp->size;
skb->data_len += txp->size;
@@ -891,7 +866,7 @@ static void xen_netbk_fill_frags(struct xen_netbk *netbk, struct sk_buff *skb)
/* Take an extra reference to offset xen_netbk_idx_release */
get_page(page);
- xen_netbk_idx_release(netbk, pending_idx);
+ xen_netbk_idx_release(vif, pending_idx);
}
}
@@ -1052,15 +1027,14 @@ static bool tx_credit_exceeded(struct xenvif *vif, unsigned size)
return false;
}
-static unsigned xen_netbk_tx_build_gops(struct xen_netbk *netbk,
+static unsigned xen_netbk_tx_build_gops(struct xenvif *vif,
struct gnttab_copy *tco)
{
struct gnttab_copy *gop = tco, *request_gop;
struct sk_buff *skb;
int ret;
- struct xenvif *vif = netbk->vif;
- while ((nr_pending_reqs(netbk) + MAX_SKB_FRAGS) < MAX_PENDING_REQS) {
+ while ((nr_pending_reqs(vif) + MAX_SKB_FRAGS) < MAX_PENDING_REQS) {
struct xen_netif_tx_request txreq;
struct xen_netif_tx_request txfrags[MAX_SKB_FRAGS];
struct page *page;
@@ -1128,8 +1102,8 @@ static unsigned xen_netbk_tx_build_gops(struct xen_netbk *netbk,
break;
}
- index = pending_index(netbk->pending_cons);
- pending_idx = netbk->pending_ring[index];
+ index = pending_index(vif->pending_cons);
+ pending_idx = vif->pending_ring[index];
data_len = (txreq.size > PKT_PROT_LEN &&
ret < MAX_SKB_FRAGS) ?
@@ -1159,7 +1133,7 @@ static unsigned xen_netbk_tx_build_gops(struct xen_netbk *netbk,
}
/* XXX could copy straight to head */
- page = xen_netbk_alloc_page(netbk, skb, pending_idx);
+ page = xen_netbk_alloc_page(vif, skb, pending_idx);
if (!page) {
kfree_skb(skb);
netbk_tx_err(vif, &txreq, idx);
@@ -1179,7 +1153,7 @@ static unsigned xen_netbk_tx_build_gops(struct xen_netbk *netbk,
gop++;
- pool_idx = netbk->mmap_pages[pending_idx];
+ pool_idx = vif->mmap_pages[pending_idx];
pending_tx_info = to_txinfo(pool_idx);
memcpy(&pending_tx_info->req,
@@ -1199,11 +1173,11 @@ static unsigned xen_netbk_tx_build_gops(struct xen_netbk *netbk,
INVALID_PENDING_IDX);
}
- __skb_queue_tail(&netbk->tx_queue, skb);
+ __skb_queue_tail(&vif->tx_queue, skb);
- netbk->pending_cons++;
+ vif->pending_cons++;
- request_gop = xen_netbk_get_requests(netbk, vif,
+ request_gop = xen_netbk_get_requests(vif,
skb, txfrags, gop);
if (request_gop == NULL) {
kfree_skb(skb);
@@ -1222,16 +1196,15 @@ static unsigned xen_netbk_tx_build_gops(struct xen_netbk *netbk,
return gop - tco;
}
-static void xen_netbk_tx_submit(struct xen_netbk *netbk,
+static void xen_netbk_tx_submit(struct xenvif *vif,
struct gnttab_copy *tco,
int *work_done, int budget)
{
struct gnttab_copy *gop = tco;
struct sk_buff *skb;
- struct xenvif *vif = netbk->vif;
while ((*work_done < budget) &&
- (skb = __skb_dequeue(&netbk->tx_queue)) != NULL) {
+ (skb = __skb_dequeue(&vif->tx_queue)) != NULL) {
struct xen_netif_tx_request *txp;
u16 pending_idx;
unsigned data_len;
@@ -1240,13 +1213,13 @@ static void xen_netbk_tx_submit(struct xen_netbk *netbk,
pending_idx = *((u16 *)skb->data);
- idx = netbk->mmap_pages[pending_idx];
+ idx = vif->mmap_pages[pending_idx];
pending_tx_info = to_txinfo(idx);
txp = &pending_tx_info->req;
/* Check the remap error code. */
- if (unlikely(xen_netbk_tx_check_gop(netbk, skb, &gop))) {
+ if (unlikely(xen_netbk_tx_check_gop(vif, skb, &gop))) {
netdev_dbg(vif->dev, "netback grant failed.\n");
skb_shinfo(skb)->nr_frags = 0;
kfree_skb(skb);
@@ -1255,7 +1228,7 @@ static void xen_netbk_tx_submit(struct xen_netbk *netbk,
data_len = skb->len;
memcpy(skb->data,
- (void *)(idx_to_kaddr(netbk, pending_idx)|txp->offset),
+ (void *)(idx_to_kaddr(vif, pending_idx)|txp->offset),
data_len);
if (data_len < txp->size) {
/* Append the packet payload as a fragment. */
@@ -1263,7 +1236,7 @@ static void xen_netbk_tx_submit(struct xen_netbk *netbk,
txp->size -= data_len;
} else {
/* Schedule a response immediately. */
- xen_netbk_idx_release(netbk, pending_idx);
+ xen_netbk_idx_release(vif, pending_idx);
}
if (txp->flags & XEN_NETTXF_csum_blank)
@@ -1271,7 +1244,7 @@ static void xen_netbk_tx_submit(struct xen_netbk *netbk,
else if (txp->flags & XEN_NETTXF_data_validated)
skb->ip_summed = CHECKSUM_UNNECESSARY;
- xen_netbk_fill_frags(netbk, skb);
+ xen_netbk_fill_frags(vif, skb);
/*
* If the initial fragment was < PKT_PROT_LEN then
@@ -1303,53 +1276,52 @@ static void xen_netbk_tx_submit(struct xen_netbk *netbk,
}
/* Called after netfront has transmitted */
-void xen_netbk_tx_action(struct xen_netbk *netbk, int *work_done, int budget)
+void xen_netbk_tx_action(struct xenvif *vif, int *work_done, int budget)
{
unsigned nr_gops;
int ret;
struct gnttab_copy *tco;
- if (unlikely(!tx_work_todo(netbk)))
+ if (unlikely(!tx_work_todo(vif)))
return;
tco = get_cpu_ptr(tx_copy_ops);
- nr_gops = xen_netbk_tx_build_gops(netbk, tco);
+ nr_gops = xen_netbk_tx_build_gops(vif, tco);
if (nr_gops == 0) {
put_cpu_ptr(tco);
- return 0;
+ return;
}
ret = HYPERVISOR_grant_table_op(GNTTABOP_copy, tco, nr_gops);
BUG_ON(ret);
- xen_netbk_tx_submit(netbk, tco, work_done, budget);
+ xen_netbk_tx_submit(vif, tco, work_done, budget);
put_cpu_ptr(tco);
}
-static void xen_netbk_idx_release(struct xen_netbk *netbk, u16 pending_idx)
+static void xen_netbk_idx_release(struct xenvif *vif, u16 pending_idx)
{
- struct xenvif *vif = netbk->vif;
struct pending_tx_info *pending_tx_info;
pending_ring_idx_t index;
int idx;
/* Already complete? */
- if (netbk->mmap_pages[pending_idx] == INVALID_ENTRY)
+ if (vif->mmap_pages[pending_idx] == INVALID_ENTRY)
return;
- idx = netbk->mmap_pages[pending_idx];
+ idx = vif->mmap_pages[pending_idx];
pending_tx_info = to_txinfo(idx);
make_tx_response(vif, &pending_tx_info->req, XEN_NETIF_RSP_OKAY);
- index = pending_index(netbk->pending_prod++);
- netbk->pending_ring[index] = pending_idx;
+ index = pending_index(vif->pending_prod++);
+ vif->pending_ring[index] = pending_idx;
- page_pool_put(netbk->mmap_pages[pending_idx]);
+ page_pool_put(vif->mmap_pages[pending_idx]);
- netbk->mmap_pages[pending_idx] = INVALID_ENTRY;
+ vif->mmap_pages[pending_idx] = INVALID_ENTRY;
}
static void make_tx_response(struct xenvif *vif,
@@ -1396,15 +1368,15 @@ static struct xen_netif_rx_response *make_rx_response(struct xenvif *vif,
return resp;
}
-static inline int rx_work_todo(struct xen_netbk *netbk)
+static inline int rx_work_todo(struct xenvif *vif)
{
- return !skb_queue_empty(&netbk->rx_queue);
+ return !skb_queue_empty(&vif->rx_queue);
}
-static inline int tx_work_todo(struct xen_netbk *netbk)
+static inline int tx_work_todo(struct xenvif *vif)
{
- if (likely(RING_HAS_UNCONSUMED_REQUESTS(&netbk->vif->tx)) &&
- (nr_pending_reqs(netbk) + MAX_SKB_FRAGS) < MAX_PENDING_REQS)
+ if (likely(RING_HAS_UNCONSUMED_REQUESTS(&vif->tx)) &&
+ (nr_pending_reqs(vif) + MAX_SKB_FRAGS) < MAX_PENDING_REQS)
return 1;
return 0;
@@ -1455,54 +1427,21 @@ err:
return err;
}
-struct xen_netbk *xen_netbk_alloc_netbk(struct xenvif *vif)
-{
- int i;
- struct xen_netbk *netbk;
-
- netbk = vzalloc(sizeof(struct xen_netbk));
- if (!netbk) {
- printk(KERN_ALERT "%s: out of memory\n", __func__);
- return NULL;
- }
-
- netbk->vif = vif;
-
- skb_queue_head_init(&netbk->rx_queue);
- skb_queue_head_init(&netbk->tx_queue);
-
- netbk->pending_cons = 0;
- netbk->pending_prod = MAX_PENDING_REQS;
- for (i = 0; i < MAX_PENDING_REQS; i++)
- netbk->pending_ring[i] = i;
-
- for (i = 0; i < MAX_PENDING_REQS; i++)
- netbk->mmap_pages[i] = INVALID_ENTRY;
-
- return netbk;
-}
-
-void xen_netbk_free_netbk(struct xen_netbk *netbk)
-{
- vfree(netbk);
-}
-
int xen_netbk_kthread(void *data)
{
struct xenvif *vif = data;
- struct xen_netbk *netbk = vif->netbk;
while (!kthread_should_stop()) {
wait_event_interruptible(vif->wq,
- rx_work_todo(netbk) ||
+ rx_work_todo(vif) ||
kthread_should_stop());
cond_resched();
if (kthread_should_stop())
break;
- if (rx_work_todo(netbk))
- xen_netbk_rx_action(netbk);
+ if (rx_work_todo(vif))
+ xen_netbk_rx_action(vif);
}
return 0;
diff --git a/drivers/net/xen-netback/page_pool.c b/drivers/net/xen-netback/page_pool.c
index 294f48b..ce00a93 100644
--- a/drivers/net/xen-netback/page_pool.c
+++ b/drivers/net/xen-netback/page_pool.c
@@ -102,7 +102,7 @@ int is_in_pool(struct page *page, int *pidx)
return get_page_ext(page, pidx);
}
-struct page *page_pool_get(struct xen_netbk *netbk, int *pidx)
+struct page *page_pool_get(struct xenvif *vif, int *pidx)
{
int idx;
struct page *page;
@@ -118,7 +118,7 @@ struct page *page_pool_get(struct xen_netbk *netbk, int *pidx)
}
set_page_ext(page, idx);
- pool[idx].u.netbk = netbk;
+ pool[idx].u.vif = vif;
pool[idx].page = page;
*pidx = idx;
@@ -131,7 +131,7 @@ void page_pool_put(int idx)
struct page *page = pool[idx].page;
pool[idx].page = NULL;
- pool[idx].u.netbk = NULL;
+ pool[idx].u.vif = NULL;
page->mapping = 0;
put_page(page);
put_free_entry(idx);
@@ -174,9 +174,9 @@ struct page *to_page(int idx)
return pool[idx].page;
}
-struct xen_netbk *to_netbk(int idx)
+struct xenvif *to_vif(int idx)
{
- return pool[idx].u.netbk;
+ return pool[idx].u.vif;
}
struct pending_tx_info *to_txinfo(int idx)
diff --git a/drivers/net/xen-netback/page_pool.h b/drivers/net/xen-netback/page_pool.h
index 572b037..efae17c 100644
--- a/drivers/net/xen-netback/page_pool.h
+++ b/drivers/net/xen-netback/page_pool.h
@@ -27,7 +27,10 @@
#ifndef __PAGE_POOL_H__
#define __PAGE_POOL_H__
-#include "common.h"
+struct pending_tx_info {
+ struct xen_netif_tx_request req;
+};
+typedef unsigned int pending_ring_idx_t;
typedef uint32_t idx_t;
@@ -38,8 +41,8 @@ struct page_pool_entry {
struct page *page;
struct pending_tx_info tx_info;
union {
- struct xen_netbk *netbk;
- idx_t fl;
+ struct xenvif *vif;
+ idx_t fl;
} u;
};
@@ -52,12 +55,12 @@ int page_pool_init(void);
void page_pool_destroy(void);
-struct page *page_pool_get(struct xen_netbk *netbk, int *pidx);
+struct page *page_pool_get(struct xenvif *vif, int *pidx);
void page_pool_put(int idx);
int is_in_pool(struct page *page, int *pidx);
struct page *to_page(int idx);
-struct xen_netbk *to_netbk(int idx);
+struct xenvif *to_vif(int idx);
struct pending_tx_info *to_txinfo(int idx);
#endif /* __PAGE_POOL_H__ */
--
1.7.2.5
--
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