diff mbox series

[v2,2/8] net/virtio: add VIRTIO_F_IN_ORDER definition

Message ID 20180625151710.29437-3-yong.liu@intel.com (mailing list archive)
State Superseded, archived
Delegated to: Maxime Coquelin
Headers show
Series support VIRTIO_F_IN_ORDER feature | expand

Checks

Context Check Description
ci/checkpatch success coding style OK
ci/Intel-compilation success Compilation OK

Commit Message

Marvin Liu June 25, 2018, 3:17 p.m. UTC
If VIRTIO_F_IN_ORDER has been negotiated, driver will use descriptors in
ring order: starting from offset 0 in the table, and wrapping around at
the end of the table. Also introduce use_inorder_[rt]x flag for
selection of IN_ORDER [RT]x handlers.

Signed-off-by: Marvin Liu <yong.liu@intel.com>

Comments

Maxime Coquelin June 26, 2018, 7:58 a.m. UTC | #1
On 06/25/2018 05:17 PM, Marvin Liu wrote:
> If VIRTIO_F_IN_ORDER has been negotiated, driver will use descriptors in
> ring order: starting from offset 0 in the table, and wrapping around at
> the end of the table. Also introduce use_inorder_[rt]x flag for
> selection of IN_ORDER [RT]x handlers.

Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>

Thanks,
Maxime
diff mbox series

Patch

diff --git a/drivers/net/virtio/virtio_pci.h b/drivers/net/virtio/virtio_pci.h
index a28ba8339..77f805df6 100644
--- a/drivers/net/virtio/virtio_pci.h
+++ b/drivers/net/virtio/virtio_pci.h
@@ -121,6 +121,12 @@  struct virtnet_ctl;
 #define VIRTIO_TRANSPORT_F_START 28
 #define VIRTIO_TRANSPORT_F_END   34
 
+/*
+ * Inorder feature indicates that all buffers are used by the device
+ * in the same order in which they have been made available.
+ */
+#define VIRTIO_F_IN_ORDER 35
+
 /* The Guest publishes the used index for which it expects an interrupt
  * at the end of the avail ring. Host should ignore the avail->flags field. */
 /* The Host publishes the avail index for which it expects a kick
@@ -233,6 +239,8 @@  struct virtio_hw {
 	uint8_t     modern;
 	uint8_t     use_simple_rx;
 	uint8_t     use_simple_tx;
+	uint8_t     use_inorder_rx;
+	uint8_t     use_inorder_tx;
 	uint16_t    port_id;
 	uint8_t     mac_addr[ETHER_ADDR_LEN];
 	uint32_t    notify_off_multiplier;