summaryrefslogtreecommitdiffstats
path: root/drivers/net/xen-netback/common.h
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2015-11-05 02:32:42 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2015-11-05 02:32:42 +0100
commit41ecf1404b34d9975eb97f5005d9e4274eaeb76a (patch)
tree8582dec3a644cfbe178132acded5ebb458e0e32e /drivers/net/xen-netback/common.h
parentMerge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/a... (diff)
parentxen: fix the check of e_pfn in xen_find_pfn_range (diff)
downloadlinux-41ecf1404b34d9975eb97f5005d9e4274eaeb76a.tar.xz
linux-41ecf1404b34d9975eb97f5005d9e4274eaeb76a.zip
Merge tag 'for-linus-4.4-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen updates from David Vrabel: - Improve balloon driver memory hotplug placement. - Use unpopulated hotplugged memory for foreign pages (if supported/enabled). - Support 64 KiB guest pages on arm64. - CPU hotplug support on arm/arm64. * tag 'for-linus-4.4-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: (44 commits) xen: fix the check of e_pfn in xen_find_pfn_range x86/xen: add reschedule point when mapping foreign GFNs xen/arm: don't try to re-register vcpu_info on cpu_hotplug. xen, cpu_hotplug: call device_offline instead of cpu_down xen/arm: Enable cpu_hotplug.c xenbus: Support multiple grants ring with 64KB xen/grant-table: Add an helper to iterate over a specific number of grants xen/xenbus: Rename *RING_PAGE* to *RING_GRANT* xen/arm: correct comment in enlighten.c xen/gntdev: use types from linux/types.h in userspace headers xen/gntalloc: use types from linux/types.h in userspace headers xen/balloon: Use the correct sizeof when declaring frame_list xen/swiotlb: Add support for 64KB page granularity xen/swiotlb: Pass addresses rather than frame numbers to xen_arch_need_swiotlb arm/xen: Add support for 64KB page granularity xen/privcmd: Add support for Linux 64KB page granularity net/xen-netback: Make it running on 64KB page granularity net/xen-netfront: Make it running on 64KB page granularity block/xen-blkback: Make it running on 64KB page granularity block/xen-blkfront: Make it running on 64KB page granularity ...
Diffstat (limited to 'drivers/net/xen-netback/common.h')
-rw-r--r--drivers/net/xen-netback/common.h16
1 files changed, 11 insertions, 5 deletions
diff --git a/drivers/net/xen-netback/common.h b/drivers/net/xen-netback/common.h
index a7bf74727116..0333ab0fd926 100644
--- a/drivers/net/xen-netback/common.h
+++ b/drivers/net/xen-netback/common.h
@@ -44,6 +44,7 @@
#include <xen/interface/grant_table.h>
#include <xen/grant_table.h>
#include <xen/xenbus.h>
+#include <xen/page.h>
#include <linux/debugfs.h>
typedef unsigned int pending_ring_idx_t;
@@ -64,8 +65,8 @@ struct pending_tx_info {
struct ubuf_info callback_struct;
};
-#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)
+#define XEN_NETIF_TX_RING_SIZE __CONST_RING_SIZE(xen_netif_tx, XEN_PAGE_SIZE)
+#define XEN_NETIF_RX_RING_SIZE __CONST_RING_SIZE(xen_netif_rx, XEN_PAGE_SIZE)
struct xenvif_rx_meta {
int id;
@@ -80,16 +81,21 @@ struct xenvif_rx_meta {
/* Discriminate from any valid pending_idx value. */
#define INVALID_PENDING_IDX 0xFFFF
-#define MAX_BUFFER_OFFSET PAGE_SIZE
+#define MAX_BUFFER_OFFSET XEN_PAGE_SIZE
#define MAX_PENDING_REQS XEN_NETIF_TX_RING_SIZE
+/* The maximum number of frags is derived from the size of a grant (same
+ * as a Xen page size for now).
+ */
+#define MAX_XEN_SKB_FRAGS (65536 / XEN_PAGE_SIZE + 1)
+
/* It's possible for an skb to have a maximal number of frags
* but still be less than MAX_BUFFER_OFFSET in size. Thus the
- * worst-case number of copy operations is MAX_SKB_FRAGS per
+ * worst-case number of copy operations is MAX_XEN_SKB_FRAGS per
* ring slot.
*/
-#define MAX_GRANT_COPY_OPS (MAX_SKB_FRAGS * XEN_NETIF_RX_RING_SIZE)
+#define MAX_GRANT_COPY_OPS (MAX_XEN_SKB_FRAGS * XEN_NETIF_RX_RING_SIZE)
#define NETBACK_INVALID_HANDLE -1