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nfp: VF rate limit support

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Add VF rate limit feature

This patch enhances the NFP driver to supports assignment of
both max_tx_rate and min_tx_rate to VFs

The template of configurations below is all supported.
e.g.
 # ip link set $DEV vf $VF_NUM max_tx_rate $RATE_VALUE
 # ip link set $DEV vf $VF_NUM min_tx_rate $RATE_VALUE
 # ip link set $DEV vf $VF_NUM max_tx_rate $RATE_VALUE \
			       min_tx_rate $RATE_VALUE
 # ip link set $DEV vf $VF_NUM min_tx_rate $RATE_VALUE \
			       max_tx_rate $RATE_VALUE

The max RATE_VALUE is limited to 0xFFFF which is about
63Gbps (using 1024 for 1G)

Signed-off-by: Bin Chen <bin.chen@corigine.com>
Signed-off-by: Louis Peens <louis.peens@corigine.com>
Signed-off-by: Baowen Zheng <baowen.zheng@corigine.com>
Signed-off-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Bin Chen 2022-05-11 13:39:32 +02:00 committed by Paolo Abeni
parent a14857c27a
commit e0d0e1fdf1
3 changed files with 56 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/net/ethernet/netronome/nfp/nfp_net_common.c
View File

@ -1903,6 +1903,7 @@ const struct net_device_ops nfp_nfd3_netdev_ops = {
.ndo_vlan_rx_kill_vid = nfp_net_vlan_rx_kill_vid,
.ndo_set_vf_mac = nfp_app_set_vf_mac,
.ndo_set_vf_vlan = nfp_app_set_vf_vlan,
.ndo_set_vf_rate = nfp_app_set_vf_rate,
.ndo_set_vf_spoofchk = nfp_app_set_vf_spoofchk,
.ndo_set_vf_trust = nfp_app_set_vf_trust,
.ndo_get_vf_config = nfp_app_get_vf_config,

48
drivers/net/ethernet/netronome/nfp/nfp_net_sriov.c
View File

@ -142,6 +142,37 @@ int nfp_app_set_vf_vlan(struct net_device *netdev, int vf, u16 vlan, u8 qos,
return nfp_net_sriov_update(app, vf, update, "vlan");
}
int nfp_app_set_vf_rate(struct net_device *netdev, int vf,
int min_tx_rate, int max_tx_rate)
{
struct nfp_app *app = nfp_app_from_netdev(netdev);
u32 vf_offset, ratevalue;
int err;
err = nfp_net_sriov_check(app, vf, NFP_NET_VF_CFG_MB_CAP_RATE, "rate");
if (err)
return err;
if (max_tx_rate >= NFP_NET_VF_RATE_MAX ||
min_tx_rate >= NFP_NET_VF_RATE_MAX) {
nfp_warn(app->cpp, "tx-rate exceeds %d.\n",
NFP_NET_VF_RATE_MAX);
return -EINVAL;
}
vf_offset = NFP_NET_VF_CFG_MB_SZ + vf * NFP_NET_VF_CFG_SZ;
ratevalue = FIELD_PREP(NFP_NET_VF_CFG_MAX_RATE,
max_tx_rate ? max_tx_rate :
NFP_NET_VF_RATE_MAX) |
FIELD_PREP(NFP_NET_VF_CFG_MIN_RATE, min_tx_rate);
writel(ratevalue,
app->pf->vfcfg_tbl2 + vf_offset + NFP_NET_VF_CFG_RATE);
return nfp_net_sriov_update(app, vf, NFP_NET_VF_CFG_MB_UPD_RATE,
"rate");
}
int nfp_app_set_vf_spoofchk(struct net_device *netdev, int vf, bool enable)
{
struct nfp_app *app = nfp_app_from_netdev(netdev);
@ -228,9 +259,8 @@ int nfp_app_get_vf_config(struct net_device *netdev, int vf,
struct ifla_vf_info *ivi)
{
struct nfp_app *app = nfp_app_from_netdev(netdev);
unsigned int vf_offset;
u32 vf_offset, mac_hi, rate;
u32 vlan_tag;
u32 mac_hi;
u16 mac_lo;
u8 flags;
int err;
@ -261,5 +291,19 @@ int nfp_app_get_vf_config(struct net_device *netdev, int vf,
ivi->trusted = FIELD_GET(NFP_NET_VF_CFG_CTRL_TRUST, flags);
ivi->linkstate = FIELD_GET(NFP_NET_VF_CFG_CTRL_LINK_STATE, flags);
err = nfp_net_sriov_check(app, vf, NFP_NET_VF_CFG_MB_CAP_RATE, "rate");
if (!err) {
rate = readl(app->pf->vfcfg_tbl2 + vf_offset +
NFP_NET_VF_CFG_RATE);
ivi->max_tx_rate = FIELD_GET(NFP_NET_VF_CFG_MAX_RATE, rate);
ivi->min_tx_rate = FIELD_GET(NFP_NET_VF_CFG_MIN_RATE, rate);
if (ivi->max_tx_rate == NFP_NET_VF_RATE_MAX)
ivi->max_tx_rate = 0;
if (ivi->min_tx_rate == NFP_NET_VF_RATE_MAX)
ivi->min_tx_rate = 0;
}
return 0;
}

9
drivers/net/ethernet/netronome/nfp/nfp_net_sriov.h
View File

@ -20,6 +20,7 @@
#define NFP_NET_VF_CFG_MB_CAP_LINK_STATE (0x1 << 3)
#define NFP_NET_VF_CFG_MB_CAP_TRUST (0x1 << 4)
#define NFP_NET_VF_CFG_MB_CAP_VLAN_PROTO (0x1 << 5)
#define NFP_NET_VF_CFG_MB_CAP_RATE (0x1 << 6)
#define NFP_NET_VF_CFG_MB_RET 0x2
#define NFP_NET_VF_CFG_MB_UPD 0x4
#define NFP_NET_VF_CFG_MB_UPD_MAC (0x1 << 0)
@ -28,6 +29,7 @@
#define NFP_NET_VF_CFG_MB_UPD_LINK_STATE (0x1 << 3)
#define NFP_NET_VF_CFG_MB_UPD_TRUST (0x1 << 4)
#define NFP_NET_VF_CFG_MB_UPD_VLAN_PROTO (0x1 << 5)
#define NFP_NET_VF_CFG_MB_UPD_RATE (0x1 << 6)
#define NFP_NET_VF_CFG_MB_VF_NUM 0x7
/* VF config entry
@ -48,10 +50,17 @@
#define NFP_NET_VF_CFG_VLAN_PROT 0xffff0000
#define NFP_NET_VF_CFG_VLAN_QOS 0xe000
#define NFP_NET_VF_CFG_VLAN_VID 0x0fff
#define NFP_NET_VF_CFG_RATE 0xc
#define NFP_NET_VF_CFG_MIN_RATE 0x0000ffff
#define NFP_NET_VF_CFG_MAX_RATE 0xffff0000
#define NFP_NET_VF_RATE_MAX 0xffff
int nfp_app_set_vf_mac(struct net_device *netdev, int vf, u8 *mac);
int nfp_app_set_vf_vlan(struct net_device *netdev, int vf, u16 vlan, u8 qos,
__be16 vlan_proto);
int nfp_app_set_vf_rate(struct net_device *netdev, int vf, int min_tx_rate,
int max_tx_rate);
int nfp_app_set_vf_spoofchk(struct net_device *netdev, int vf, bool setting);
int nfp_app_set_vf_trust(struct net_device *netdev, int vf, bool setting);
int nfp_app_set_vf_link_state(struct net_device *netdev, int vf,