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net/virtio: add in-order feature bit definition

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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>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
This commit is contained in:
Marvin Liu 2018-07-02 21:56:35 +08:00 committed by Ferruh Yigit
parent 22d2e78840
commit 9f233f54aa
2 changed files with 10 additions and 0 deletions
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8
drivers/net/virtio/virtio_pci.h
View File

@ -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;

2
drivers/net/virtio/virtio_user_ethdev.c
View File

@ -441,6 +441,8 @@ virtio_user_eth_dev_alloc(struct rte_vdev_device *vdev)
hw->modern = 0;
hw->use_simple_rx = 0;
hw->use_simple_tx = 0;
hw->use_inorder_rx = 0;
hw->use_inorder_tx = 0;
hw->virtio_user_dev = dev;
return eth_dev;
}