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From: Marvin Liu <yong.liu@intel.com>
To: maxime.coquelin@redhat.com, tiwei.bie@intel.com
Cc: zhihong.wang@intel.com, dev@dpdk.org, Marvin Liu <yong.liu@intel.com>
Subject: [dpdk-dev] [PATCH v4 2/9] net/virtio: add in-order feature bit definition
Date: Sun,  1 Jul 2018 07:50:42 +0800	[thread overview]
Message-ID: <20180630235049.62610-3-yong.liu@intel.com> (raw)
In-Reply-To: <20180630235049.62610-1-yong.liu@intel.com>

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>

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;
-- 
2.17.0

  parent reply	other threads:[~2018-06-30 16:05 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-30 23:50 [dpdk-dev] [PATCH v4 0/9] support in-order feature Marvin Liu
2018-06-30 23:50 ` [dpdk-dev] [PATCH v4 1/9] vhost: advertise " Marvin Liu
2018-06-30 23:50 ` Marvin Liu [this message]
2018-06-30 23:50 ` [dpdk-dev] [PATCH v4 3/9] net/virtio-user: add unsupported features mask Marvin Liu
2018-06-30 23:50 ` [dpdk-dev] [PATCH v4 4/9] net/virtio-user: add mrg-rxbuf and in-order vdev parameters Marvin Liu
2018-06-30 23:50 ` [dpdk-dev] [PATCH v4 5/9] net/virtio: free in-order descriptors before device start Marvin Liu
2018-07-02  7:18   ` Maxime Coquelin
2018-06-30 23:50 ` [dpdk-dev] [PATCH v4 6/9] net/virtio: extract common part for in-order functions Marvin Liu
2018-06-30 23:50 ` [dpdk-dev] [PATCH v4 7/9] net/virtio: support in-order Rx and Tx Marvin Liu
2018-06-30 23:50 ` [dpdk-dev] [PATCH v4 8/9] net/virtio: add in-order Rx/Tx into selection Marvin Liu
2018-06-30 23:50 ` [dpdk-dev] [PATCH v4 9/9] net/virtio: advertise support in-order feature Marvin Liu

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