[dpdk-dev] [PATCH v1] net/vhost: add config option for linear and extbuf
Sivaprasad Tummala
Sivaprasad.Tummala at intel.com
Wed Feb 26 11:00:34 CET 2020
Added vHost PMD arguments 'linear-buffer' and 'ext-buffer'
to configure 'RTE_VHOST_USER_LINEARBUF_SUPPORT' and
'RTE_VHOST_USER_EXTBUF_SUPPORT' flags in the vhost library
Signed-off-by: Sivaprasad Tummala <Sivaprasad.Tummala at intel.com>
---
doc/guides/nics/vhost.rst | 10 ++++++++++
drivers/net/vhost/rte_eth_vhost.c | 32 ++++++++++++++++++++++++++++++-
2 files changed, 41 insertions(+), 1 deletion(-)
diff --git a/doc/guides/nics/vhost.rst b/doc/guides/nics/vhost.rst
index 912f4bdd9..d36f3120b 100644
--- a/doc/guides/nics/vhost.rst
+++ b/doc/guides/nics/vhost.rst
@@ -54,6 +54,16 @@ The user can specify below arguments in `--vdev` option.
It is used to enable tso support in vhost library.
(Default: 0 (disabled))
+#. ``linear-buffer``:
+
+ It is used to enable linear buffer support in vhost library.
+ (Default: 0 (disabled))
+
+#. ``ext-buffer``:
+
+ It is used to enable external buffer support in vhost library.
+ (Default: 0 (disabled))
+
Vhost PMD event handling
------------------------
diff --git a/drivers/net/vhost/rte_eth_vhost.c b/drivers/net/vhost/rte_eth_vhost.c
index a63588986..9f2e85a1b 100644
--- a/drivers/net/vhost/rte_eth_vhost.c
+++ b/drivers/net/vhost/rte_eth_vhost.c
@@ -32,6 +32,8 @@ enum {VIRTIO_RXQ, VIRTIO_TXQ, VIRTIO_QNUM};
#define ETH_VHOST_IOMMU_SUPPORT "iommu-support"
#define ETH_VHOST_POSTCOPY_SUPPORT "postcopy-support"
#define ETH_VHOST_VIRTIO_NET_F_HOST_TSO "tso"
+#define ETH_VHOST_LINEAR_BUF "linear-buffer"
+#define ETH_VHOST_EXT_BUF "ext-buffer"
#define VHOST_MAX_PKT_BURST 32
static const char *valid_arguments[] = {
@@ -42,6 +44,8 @@ static const char *valid_arguments[] = {
ETH_VHOST_IOMMU_SUPPORT,
ETH_VHOST_POSTCOPY_SUPPORT,
ETH_VHOST_VIRTIO_NET_F_HOST_TSO,
+ ETH_VHOST_LINEAR_BUF,
+ ETH_VHOST_EXT_BUF,
NULL
};
@@ -1358,6 +1362,8 @@ rte_pmd_vhost_probe(struct rte_vdev_device *dev)
int iommu_support = 0;
int postcopy_support = 0;
int tso = 0;
+ int linear_buf = 0;
+ int ext_buf = 0;
struct rte_eth_dev *eth_dev;
const char *name = rte_vdev_device_name(dev);
@@ -1452,6 +1458,28 @@ rte_pmd_vhost_probe(struct rte_vdev_device *dev)
}
}
+ if (rte_kvargs_count(kvlist, ETH_VHOST_LINEAR_BUF) == 1) {
+ ret = rte_kvargs_process(kvlist,
+ ETH_VHOST_LINEAR_BUF,
+ &open_int, &linear_buf);
+ if (ret < 0)
+ goto out_free;
+
+ if (linear_buf == 1)
+ flags |= RTE_VHOST_USER_LINEARBUF_SUPPORT;
+ }
+
+ if (rte_kvargs_count(kvlist, ETH_VHOST_EXT_BUF) == 1) {
+ ret = rte_kvargs_process(kvlist,
+ ETH_VHOST_EXT_BUF,
+ &open_int, &ext_buf);
+ if (ret < 0)
+ goto out_free;
+
+ if (ext_buf == 1)
+ flags |= RTE_VHOST_USER_EXTBUF_SUPPORT;
+ }
+
if (dev->device.numa_node == SOCKET_ID_ANY)
dev->device.numa_node = rte_socket_id();
@@ -1503,7 +1531,9 @@ RTE_PMD_REGISTER_PARAM_STRING(net_vhost,
"dequeue-zero-copy=<0|1> "
"iommu-support=<0|1> "
"postcopy-support=<0|1> "
- "tso=<0|1>");
+ "tso=<0|1> "
+ "linear-buffer=<0|1> "
+ "ext-buffer=<0|1>");
RTE_INIT(vhost_init_log)
{
--
2.17.1
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