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Date: Mon, 7 Feb 2022 14:55:37 +0200
From: Eli Cohen <elic@...dia.com>
To: <stephen@...workplumber.org>, <netdev@...r.kernel.org>
CC: <jasowang@...hat.com>, <si-wei.liu@...cle.com>,
Eli Cohen <elic@...dia.com>, Jianbo Liu <jianbol@...dia.com>
Subject: [PATCH 3/3] vdpa: Add support to configure max number of VQs
Add support to configure max supported virtqueue pairs for a vdpa
device. For this to be possible, add support for reading management
device's capabilities. Management device capabilities give the user a
hint as to how many virtqueue pairs at most he can ask for. Using this
information the user can choose a valid number of virtqueue pairs when
creating the device.
Examples:
- Show management device capabiliteis:
$ vdpa mgmtdev show
auxiliary/mlx5_core.sf.1:
supported_classes net
max_supported_vqs 257
dev_features CSUM GUEST_CSUM MTU HOST_TSO4 HOST_TSO6 STATUS CTRL_VQ \
MQ CTRL_MAC_ADDR VERSION_1 ACCESS_PLATFORM
A user can now create a device based on the above information. In the
above case 128 virtqueue pairs at most. The other VQ being for the
control virtqueue.
- Add a vdpa device with 16 data virtqueue pairs
$ vdpa dev add name vdpa-a mgmtdev auxiliary/mlx5_core.sf.1 max_vqp 16
After feature negotiation has been completed, one can read the vdpa
configuration using:
$ vdpa dev config show
vdpa-a: mac 00:00:00:00:88:88 link up link_announce false max_vq_pairs 16 mtu 1500
negotiated_features CSUM GUEST_CSUM MTU MAC HOST_TSO4 HOST_TSO6 STATUS
CTRL_VQ MQ CTRL_MAC_ADDR VERSION_1 ACCESS_PLATFORM
Reviewed-by: Jianbo Liu <jianbol@...dia.com>
Signed-off-by: Eli Cohen <elic@...dia.com>
---
vdpa/include/uapi/linux/vdpa.h | 4 ++
vdpa/vdpa.c | 113 ++++++++++++++++++++++++++++++++-
2 files changed, 114 insertions(+), 3 deletions(-)
diff --git a/vdpa/include/uapi/linux/vdpa.h b/vdpa/include/uapi/linux/vdpa.h
index b7eab069988a..171122dd03c9 100644
--- a/vdpa/include/uapi/linux/vdpa.h
+++ b/vdpa/include/uapi/linux/vdpa.h
@@ -40,6 +40,10 @@ enum vdpa_attr {
VDPA_ATTR_DEV_NET_CFG_MAX_VQP, /* u16 */
VDPA_ATTR_DEV_NET_CFG_MTU, /* u16 */
+ VDPA_ATTR_DEV_NEGOTIATED_FEATURES, /* u64 */
+ VDPA_ATTR_DEV_MGMTDEV_MAX_VQS, /* u32 */
+ VDPA_ATTR_DEV_SUPPORTED_FEATURES, /* u64 */
+
/* new attributes must be added above here */
VDPA_ATTR_MAX,
};
diff --git a/vdpa/vdpa.c b/vdpa/vdpa.c
index 4ccb564872a0..d0dd4196610f 100644
--- a/vdpa/vdpa.c
+++ b/vdpa/vdpa.c
@@ -23,6 +23,7 @@
#define VDPA_OPT_VDEV_HANDLE BIT(3)
#define VDPA_OPT_VDEV_MAC BIT(4)
#define VDPA_OPT_VDEV_MTU BIT(5)
+#define VDPA_OPT_MAX_VQP BIT(6)
struct vdpa_opts {
uint64_t present; /* flags of present items */
@@ -32,6 +33,7 @@ struct vdpa_opts {
unsigned int device_id;
char mac[ETH_ALEN];
uint16_t mtu;
+ uint16_t max_vqp;
};
struct vdpa {
@@ -78,6 +80,9 @@ static const enum mnl_attr_data_type vdpa_policy[VDPA_ATTR_MAX + 1] = {
[VDPA_ATTR_DEV_VENDOR_ID] = MNL_TYPE_U32,
[VDPA_ATTR_DEV_MAX_VQS] = MNL_TYPE_U32,
[VDPA_ATTR_DEV_MAX_VQ_SIZE] = MNL_TYPE_U16,
+ [VDPA_ATTR_DEV_NEGOTIATED_FEATURES] = MNL_TYPE_U64,
+ [VDPA_ATTR_DEV_MGMTDEV_MAX_VQS] = MNL_TYPE_U32,
+ [VDPA_ATTR_DEV_SUPPORTED_FEATURES] = MNL_TYPE_U64,
};
static int attr_cb(const struct nlattr *attr, void *data)
@@ -219,6 +224,8 @@ static void vdpa_opts_put(struct nlmsghdr *nlh, struct vdpa *vdpa)
sizeof(opts->mac), opts->mac);
if (opts->present & VDPA_OPT_VDEV_MTU)
mnl_attr_put_u16(nlh, VDPA_ATTR_DEV_NET_CFG_MTU, opts->mtu);
+ if (opts->present & VDPA_OPT_MAX_VQP)
+ mnl_attr_put_u16(nlh, VDPA_ATTR_DEV_NET_CFG_MAX_VQP, opts->max_vqp);
}
static int vdpa_argv_parse(struct vdpa *vdpa, int argc, char **argv,
@@ -287,6 +294,14 @@ static int vdpa_argv_parse(struct vdpa *vdpa, int argc, char **argv,
NEXT_ARG_FWD();
o_found |= VDPA_OPT_VDEV_MTU;
+ } else if ((matches(*argv, "max_vqp") == 0) && (o_optional & VDPA_OPT_MAX_VQP)) {
+ NEXT_ARG_FWD();
+ err = vdpa_argv_u16(vdpa, argc, argv, &opts->max_vqp);
+ if (err)
+ return err;
+
+ NEXT_ARG_FWD();
+ o_found |= VDPA_OPT_MAX_VQP;
} else {
fprintf(stderr, "Unknown option \"%s\"\n", *argv);
return -EINVAL;
@@ -385,6 +400,77 @@ static const char *parse_class(int num)
return class ? class : "< unknown class >";
}
+static const char * const net_feature_strs[64] = {
+ [VIRTIO_NET_F_CSUM] = "CSUM",
+ [VIRTIO_NET_F_GUEST_CSUM] = "GUEST_CSUM",
+ [VIRTIO_NET_F_CTRL_GUEST_OFFLOADS] = "CTRL_GUEST_OFFLOADS",
+ [VIRTIO_NET_F_MTU] = "MTU",
+ [VIRTIO_NET_F_MAC] = "MAC",
+ [VIRTIO_NET_F_GUEST_TSO4] = "GUEST_TSO4",
+ [VIRTIO_NET_F_GUEST_TSO6] = "GUEST_TSO6",
+ [VIRTIO_NET_F_GUEST_ECN] = "GUEST_ECN",
+ [VIRTIO_NET_F_GUEST_UFO] = "GUEST_UFO",
+ [VIRTIO_NET_F_HOST_TSO4] = "HOST_TSO4",
+ [VIRTIO_NET_F_HOST_TSO6] = "HOST_TSO6",
+ [VIRTIO_NET_F_HOST_ECN] = "HOST_ECN",
+ [VIRTIO_NET_F_HOST_UFO] = "HOST_UFO",
+ [VIRTIO_NET_F_MRG_RXBUF] = "MRG_RXBUF",
+ [VIRTIO_NET_F_STATUS] = "STATUS",
+ [VIRTIO_NET_F_CTRL_VQ] = "CTRL_VQ",
+ [VIRTIO_NET_F_CTRL_RX] = "CTRL_RX",
+ [VIRTIO_NET_F_CTRL_VLAN] = "CTRL_VLAN",
+ [VIRTIO_NET_F_CTRL_RX_EXTRA] = "CTRL_RX_EXTRA",
+ [VIRTIO_NET_F_GUEST_ANNOUNCE] = "GUEST_ANNOUNCE",
+ [VIRTIO_NET_F_MQ] = "MQ",
+ [VIRTIO_F_NOTIFY_ON_EMPTY] = "NOTIFY_ON_EMPTY",
+ [VIRTIO_NET_F_CTRL_MAC_ADDR] = "CTRL_MAC_ADDR",
+ [VIRTIO_F_ANY_LAYOUT] = "ANY_LAYOUT",
+ [VIRTIO_NET_F_RSC_EXT] = "RSC_EXT",
+ [VIRTIO_NET_F_STANDBY] = "STANDBY",
+};
+
+#define VDPA_EXT_FEATURES_SZ (VIRTIO_DEV_INDEPENDENT_F_END - \
+ VIRTIO_DEV_INDEPENDENT_F_START + 1)
+
+static const char * const ext_feature_strs[VDPA_EXT_FEATURES_SZ] = {
+ [VIRTIO_F_RING_INDIRECT_DESC - VIRTIO_DEV_INDEPENDENT_F_START] = "RING_INDIRECT_DESC",
+ [VIRTIO_F_RING_EVENT_IDX - VIRTIO_DEV_INDEPENDENT_F_START] = "RING_EVENT_IDX",
+ [VIRTIO_F_VERSION_1 - VIRTIO_DEV_INDEPENDENT_F_START] = "VERSION_1",
+ [VIRTIO_F_ACCESS_PLATFORM - VIRTIO_DEV_INDEPENDENT_F_START] = "ACCESS_PLATFORM",
+ [VIRTIO_F_RING_PACKED - VIRTIO_DEV_INDEPENDENT_F_START] = "RING_PACKED",
+ [VIRTIO_F_IN_ORDER - VIRTIO_DEV_INDEPENDENT_F_START] = "IN_ORDER",
+ [VIRTIO_F_ORDER_PLATFORM - VIRTIO_DEV_INDEPENDENT_F_START] = "ORDER_PLATFORM",
+ [VIRTIO_F_SR_IOV - VIRTIO_DEV_INDEPENDENT_F_START] = "SR_IOV",
+ [VIRTIO_F_NOTIFICATION_DATA - VIRTIO_DEV_INDEPENDENT_F_START] = "NOTIFICATION_DATA",
+};
+
+static void print_net_features(struct vdpa *vdpa, uint64_t features, bool maxf)
+{
+ const char *s;
+ int i;
+
+ if (maxf)
+ pr_out_array_start(vdpa, "dev_features");
+ else
+ pr_out_array_start(vdpa, "negotiated_features");
+
+ for (i = 0; i < 64; i++) {
+ if (!(features & (1ULL << i)))
+ continue;
+
+ if (i >= VIRTIO_DEV_INDEPENDENT_F_START && i <= VIRTIO_DEV_INDEPENDENT_F_END)
+ s = ext_feature_strs[i - VIRTIO_DEV_INDEPENDENT_F_START];
+ else
+ s = net_feature_strs[i];
+
+ if (!s)
+ print_uint(PRINT_ANY, NULL, " unrecognized_bit_%d", i);
+ else
+ print_string(PRINT_ANY, NULL, " %s", s);
+ }
+ pr_out_array_end(vdpa);
+}
+
static void pr_out_mgmtdev_show(struct vdpa *vdpa, const struct nlmsghdr *nlh,
struct nlattr **tb)
{
@@ -408,6 +494,22 @@ static void pr_out_mgmtdev_show(struct vdpa *vdpa, const struct nlmsghdr *nlh,
pr_out_array_end(vdpa);
}
+ if (tb[VDPA_ATTR_DEV_MGMTDEV_MAX_VQS]) {
+ uint16_t num_vqs;
+
+ if (!vdpa->json_output)
+ printf("\n");
+ num_vqs = mnl_attr_get_u16(tb[VDPA_ATTR_DEV_MGMTDEV_MAX_VQS]);
+ print_uint(PRINT_ANY, "max_supported_vqs", " max_supported_vqs %d", num_vqs);
+ }
+
+ if (tb[VDPA_ATTR_DEV_SUPPORTED_FEATURES]) {
+ uint64_t features;
+
+ features = mnl_attr_get_u64(tb[VDPA_ATTR_DEV_SUPPORTED_FEATURES]);
+ print_net_features(vdpa, features, true);
+ }
+
pr_out_handle_end(vdpa);
}
@@ -557,7 +659,7 @@ static int cmd_dev_add(struct vdpa *vdpa, int argc, char **argv)
NLM_F_REQUEST | NLM_F_ACK);
err = vdpa_argv_parse_put(nlh, vdpa, argc, argv,
VDPA_OPT_VDEV_MGMTDEV_HANDLE | VDPA_OPT_VDEV_NAME,
- VDPA_OPT_VDEV_MAC | VDPA_OPT_VDEV_MTU);
+ VDPA_OPT_VDEV_MAC | VDPA_OPT_VDEV_MTU | VDPA_OPT_MAX_VQP);
if (err)
return err;
@@ -579,9 +681,10 @@ static int cmd_dev_del(struct vdpa *vdpa, int argc, char **argv)
return mnlu_gen_socket_sndrcv(&vdpa->nlg, nlh, NULL, NULL);
}
-static void pr_out_dev_net_config(struct nlattr **tb)
+static void pr_out_dev_net_config(struct vdpa *vdpa, struct nlattr **tb)
{
SPRINT_BUF(macaddr);
+ uint64_t val_u64;
uint16_t val_u16;
if (tb[VDPA_ATTR_DEV_NET_CFG_MACADDR]) {
@@ -610,6 +713,10 @@ static void pr_out_dev_net_config(struct nlattr **tb)
val_u16 = mnl_attr_get_u16(tb[VDPA_ATTR_DEV_NET_CFG_MTU]);
print_uint(PRINT_ANY, "mtu", "mtu %d ", val_u16);
}
+ if (tb[VDPA_ATTR_DEV_NEGOTIATED_FEATURES]) {
+ val_u64 = mnl_attr_get_u64(tb[VDPA_ATTR_DEV_NEGOTIATED_FEATURES]);
+ print_net_features(vdpa, val_u64, false);
+ }
}
static void pr_out_dev_config(struct vdpa *vdpa, struct nlattr **tb)
@@ -619,7 +726,7 @@ static void pr_out_dev_config(struct vdpa *vdpa, struct nlattr **tb)
pr_out_vdev_handle_start(vdpa, tb);
switch (device_id) {
case VIRTIO_ID_NET:
- pr_out_dev_net_config(tb);
+ pr_out_dev_net_config(vdpa, tb);
break;
default:
break;
--
2.34.1
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