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cxgb4: implement ndo_set_vf_rate() 

Implement ndo_set_vf_rate() for mgmt interface to support rate-limiting
of VF traffic using 'ip' command.

Based on the original work of Kumar Sanghvi <kumaras@chelsio.com>

Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ganesh Goudar 2017-06-05 18:34:20 +05:30 committed by David S. Miller
parent 4f5a98410d
commit 8ea4fae926
2 changed files with 107 additions and 0 deletions
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1
drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
View File

@ -777,6 +777,7 @@ struct uld_msix_info {
struct vf_info {
unsigned char vf_mac_addr[ETH_ALEN];
unsigned int tx_rate;
bool pf_set_mac;
};

106
drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
View File

@ -2563,6 +2563,8 @@ static int cxgb_get_vf_config(struct net_device *dev,
if (vf >= adap->num_vfs)
return -EINVAL;
ivi->vf = vf;
ivi->max_tx_rate = adap->vfinfo[vf].tx_rate;
ivi->min_tx_rate = 0;
ether_addr_copy(ivi->mac, adap->vfinfo[vf].vf_mac_addr);
return 0;
}
@ -2579,6 +2581,109 @@ static int cxgb_get_phys_port_id(struct net_device *dev,
return 0;
}
static int cxgb_set_vf_rate(struct net_device *dev, int vf, int min_tx_rate,
int max_tx_rate)
{
struct port_info *pi = netdev_priv(dev);
struct adapter *adap = pi->adapter;
struct fw_port_cmd port_cmd, port_rpl;
u32 link_status, speed = 0;
u32 fw_pfvf, fw_class;
int class_id = vf;
int link_ok, ret;
u16 pktsize;
if (vf >= adap->num_vfs)
return -EINVAL;
if (min_tx_rate) {
dev_err(adap->pdev_dev,
"Min tx rate (%d) (> 0) for VF %d is Invalid.\n",
min_tx_rate, vf);
return -EINVAL;
}
/* Retrieve link details for VF port */
memset(&port_cmd, 0, sizeof(port_cmd));
port_cmd.op_to_portid = cpu_to_be32(FW_CMD_OP_V(FW_PORT_CMD) |
FW_CMD_REQUEST_F |
FW_CMD_READ_F |
FW_PORT_CMD_PORTID_V(pi->port_id));
port_cmd.action_to_len16 =
cpu_to_be32(FW_PORT_CMD_ACTION_V(FW_PORT_ACTION_GET_PORT_INFO) |
FW_LEN16(port_cmd));
ret = t4_wr_mbox(adap, adap->mbox, &port_cmd, sizeof(port_cmd),
&port_rpl);
if (ret != FW_SUCCESS) {
dev_err(adap->pdev_dev,
"Failed to get link status for VF %d\n", vf);
return -EINVAL;
}
link_status = be32_to_cpu(port_rpl.u.info.lstatus_to_modtype);
link_ok = (link_status & FW_PORT_CMD_LSTATUS_F) != 0;
if (!link_ok) {
dev_err(adap->pdev_dev, "Link down for VF %d\n", vf);
return -EINVAL;
}
/* Determine link speed */
if (link_status & FW_PORT_CMD_LSPEED_V(FW_PORT_CAP_SPEED_100M))
speed = 100;
else if (link_status & FW_PORT_CMD_LSPEED_V(FW_PORT_CAP_SPEED_1G))
speed = 1000;
else if (link_status & FW_PORT_CMD_LSPEED_V(FW_PORT_CAP_SPEED_10G))
speed = 10000;
else if (link_status & FW_PORT_CMD_LSPEED_V(FW_PORT_CAP_SPEED_25G))
speed = 25000;
else if (link_status & FW_PORT_CMD_LSPEED_V(FW_PORT_CAP_SPEED_40G))
speed = 40000;
else if (link_status & FW_PORT_CMD_LSPEED_V(FW_PORT_CAP_SPEED_100G))
speed = 100000;
if (max_tx_rate > speed) {
dev_err(adap->pdev_dev,
"Max tx rate %d for VF %d can't be > link-speed %u",
max_tx_rate, vf, speed);
return -EINVAL;
}
pktsize = be16_to_cpu(port_rpl.u.info.mtu);
/* subtract ethhdr size and 4 bytes crc since, f/w appends it */
pktsize = pktsize - sizeof(struct ethhdr) - 4;
/* subtract ipv4 hdr size, tcp hdr size to get typical IPv4 MSS size */
pktsize = pktsize - sizeof(struct iphdr) - sizeof(struct tcphdr);
/* configure Traffic Class for rate-limiting */
ret = t4_sched_params(adap, SCHED_CLASS_TYPE_PACKET,
SCHED_CLASS_LEVEL_CL_RL,
SCHED_CLASS_MODE_CLASS,
SCHED_CLASS_RATEUNIT_BITS,
SCHED_CLASS_RATEMODE_ABS,
pi->port_id, class_id, 0,
max_tx_rate * 1000, 0, pktsize);
if (ret) {
dev_err(adap->pdev_dev, "Err %d for Traffic Class config\n",
ret);
return -EINVAL;
}
dev_info(adap->pdev_dev,
"Class %d with MSS %u configured with rate %u\n",
class_id, pktsize, max_tx_rate);
/* bind VF to configured Traffic Class */
fw_pfvf = (FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_PFVF) |
FW_PARAMS_PARAM_X_V(FW_PARAMS_PARAM_PFVF_SCHEDCLASS_ETH));
fw_class = class_id;
ret = t4_set_params(adap, adap->mbox, adap->pf, vf + 1, 1, &fw_pfvf,
&fw_class);
if (ret) {
dev_err(adap->pdev_dev,
"Err %d in binding VF %d to Traffic Class %d\n",
ret, vf, class_id);
return -EINVAL;
}
dev_info(adap->pdev_dev, "PF %d VF %d is bound to Class %d\n",
adap->pf, vf, class_id);
adap->vfinfo[vf].tx_rate = max_tx_rate;
return 0;
}
#endif
static int cxgb_set_mac_addr(struct net_device *dev, void *p)
@ -2766,6 +2871,7 @@ static const struct net_device_ops cxgb4_mgmt_netdev_ops = {
.ndo_open = dummy_open,
.ndo_set_vf_mac = cxgb_set_vf_mac,
.ndo_get_vf_config = cxgb_get_vf_config,
.ndo_set_vf_rate = cxgb_set_vf_rate,
.ndo_get_phys_port_id = cxgb_get_phys_port_id,
};
#endif