net/virtio: remove remaining simple Tx related stuff

[ upstream commit 1d2aa48 ]

The simple Tx path in virtio has been removed in below commit.
This patch removes an undefined function declaration of simple
Tx and all related descriptions in the doc.

Fixes: 57f8189 ("net/virtio: remove simple Tx path")

Signed-off-by: Tiwei Bie <tiwei.bie@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>

doc/guides/nics/virtio.rst

@@ -201,7 +201,7 @@ The packet transmission flow is:
 Virtio PMD Rx/Tx Callbacks
 --------------------------
 
-Virtio driver has 4 Rx callbacks and 3 Tx callbacks.
+Virtio driver has 4 Rx callbacks and 2 Tx callbacks.
 
 Rx callbacks:
 
@@ -223,9 +223,6 @@ Tx callbacks:
 #. ``virtio_xmit_pkts``:
    Regular version.
 
-#. ``virtio_xmit_pkts_simple``:
-   Vector version fixes the available ring indexes to optimize performance.
-
 #. ``virtio_xmit_pkts_inorder``:
    In-order version.
 
@@ -239,25 +236,17 @@ By default, the non-vector callbacks are used:
 
 Vector callbacks will be used when:
 
-*   ``txmode.offloads`` is set to ``0x0``, which implies:
-
-    *   Single segment is specified.
-
-    *   No offload support is needed.
-
 *   Mergeable Rx buffers is disabled.
 
 The corresponding callbacks are:
 
 *   For Rx: ``virtio_recv_pkts_vec``.
 
-*   For Tx: ``virtio_xmit_pkts_simple``.
-
 
 Example of using the vector version of the virtio poll mode driver in
 ``testpmd``::
 
-   testpmd -l 0-2 -n 4 -- -i --tx-offloads=0x0 --rxq=1 --txq=1 --nb-cores=1
+   testpmd -l 0-2 -n 4 -- -i --rxq=1 --txq=1 --nb-cores=1
 
 In-order callbacks only work on simulated virtio user vdev.
 

drivers/net/virtio/virtio_ethdev.h

@@ -94,9 +94,6 @@ uint16_t virtio_xmit_pkts_inorder(void *tx_queue, struct rte_mbuf **tx_pkts,
 uint16_t virtio_recv_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts,
 		uint16_t nb_pkts);
 
-uint16_t virtio_xmit_pkts_simple(void *tx_queue, struct rte_mbuf **tx_pkts,
-		uint16_t nb_pkts);
-
 int eth_virtio_dev_init(struct rte_eth_dev *eth_dev);
 
 void virtio_interrupt_handler(void *param);