Commit 51efbbdf authored by Brett Creeley's avatar Brett Creeley Committed by Tony Nguyen

ice: Manage VF's MAC address for both legacy and new cases

Currently there is no way for a VF driver to specify if it wants to
change it's hardware address. New bits are being added to virtchnl.h
in struct virtchnl_ether_addr that allow for the VF to correctly
communicate this information. However, legacy VF drivers that don't
support the new virtchnl.h bits still need to be supported. Make a
best effort attempt at saving the VF's primary/device address in the
legacy case and depend on the VIRTCHNL_ETHER_ADDR_PRIMARY type for
the new case.

Legacy case - If a unicast MAC is being added and the
hw_lan_addr.addr is empty, then populate it. This assumes that the
address is the VF's hardware address. If a unicast MAC is being
added and the hw_lan_addr.addr is not empty, then cache it in the
legacy_last_added_umac.addr. If a unicast MAC is being deleted and it
matches the hw_lan_addr.addr, then zero the hw_lan_addr.addr.
Also, if the legacy_last_added_umac.addr has not expired, copy the
legacy_last_added_umac.addr into the hw_lan_addr.addr. This is done
because we cannot guarantee the order of VIRTCHNL_OP_ADD_ETH_ADDR and
VIRTCHNL_OP_DEL_ETH_ADDR.

New case - If a unicast MAC is being added and it's specified as
VIRTCHNL_ETHER_ADDR_PRIMARY, then replace the current
hw_lan_addr.addr. If a unicast MAC is being deleted and it's type
is specified as VIRTCHNL_ETHER_ADDR_PRIMARY, then zero the
hw_lan_addr.addr.

Untrusted VFs - Only allow above legacy/new changes to their
hardware address if the PF has not set it administratively via
iproute2.

Trusted VFs - Always allow above legacy/new changes to their
hardware address even if the PF has administratively set it via
iproute2.

Also, change the variable dflt_lan_addr to hw_lan_addr to clearly
represent the purpose of this variable since it's purpose is to
act as a hardware programmed MAC address for the VF.
Signed-off-by: default avatarBrett Creeley <brett.creeley@intel.com>
Tested-by: default avatarKonrad Jankowski <konrad0.jankowski@intel.com>
Signed-off-by: default avatarTony Nguyen <anthony.l.nguyen@intel.com>
parent eb550f53
......@@ -937,12 +937,12 @@ static int ice_vf_rebuild_host_mac_cfg(struct ice_vf *vf)
vf->num_mac++;
if (is_valid_ether_addr(vf->dflt_lan_addr.addr)) {
status = ice_fltr_add_mac(vsi, vf->dflt_lan_addr.addr,
if (is_valid_ether_addr(vf->hw_lan_addr.addr)) {
status = ice_fltr_add_mac(vsi, vf->hw_lan_addr.addr,
ICE_FWD_TO_VSI);
if (status) {
dev_err(dev, "failed to add default unicast MAC filter %pM for VF %u, error %s\n",
&vf->dflt_lan_addr.addr[0], vf->vf_id,
&vf->hw_lan_addr.addr[0], vf->vf_id,
ice_stat_str(status));
return ice_status_to_errno(status);
}
......@@ -2379,7 +2379,7 @@ static int ice_vc_get_vf_res_msg(struct ice_vf *vf, u8 *msg)
vfres->vsi_res[0].vsi_type = VIRTCHNL_VSI_SRIOV;
vfres->vsi_res[0].num_queue_pairs = vsi->num_txq;
ether_addr_copy(vfres->vsi_res[0].default_mac_addr,
vf->dflt_lan_addr.addr);
vf->hw_lan_addr.addr);
/* match guest capabilities */
vf->driver_caps = vfres->vf_cap_flags;
......@@ -3659,20 +3659,94 @@ static bool ice_can_vf_change_mac(struct ice_vf *vf)
return true;
}
/**
* ice_vc_ether_addr_type - get type of virtchnl_ether_addr
* @vc_ether_addr: used to extract the type
*/
static u8
ice_vc_ether_addr_type(struct virtchnl_ether_addr *vc_ether_addr)
{
return (vc_ether_addr->type & VIRTCHNL_ETHER_ADDR_TYPE_MASK);
}
/**
* ice_is_vc_addr_legacy - check if the MAC address is from an older VF
* @vc_ether_addr: VIRTCHNL structure that contains MAC and type
*/
static bool
ice_is_vc_addr_legacy(struct virtchnl_ether_addr *vc_ether_addr)
{
u8 type = ice_vc_ether_addr_type(vc_ether_addr);
return (type == VIRTCHNL_ETHER_ADDR_LEGACY);
}
/**
* ice_is_vc_addr_primary - check if the MAC address is the VF's primary MAC
* @vc_ether_addr: VIRTCHNL structure that contains MAC and type
*
* This function should only be called when the MAC address in
* virtchnl_ether_addr is a valid unicast MAC
*/
static bool
ice_is_vc_addr_primary(struct virtchnl_ether_addr __maybe_unused *vc_ether_addr)
{
u8 type = ice_vc_ether_addr_type(vc_ether_addr);
return (type == VIRTCHNL_ETHER_ADDR_PRIMARY);
}
/**
* ice_vfhw_mac_add - update the VF's cached hardware MAC if allowed
* @vf: VF to update
* @vc_ether_addr: structure from VIRTCHNL with MAC to add
*/
static void
ice_vfhw_mac_add(struct ice_vf *vf, struct virtchnl_ether_addr *vc_ether_addr)
{
u8 *mac_addr = vc_ether_addr->addr;
if (!is_valid_ether_addr(mac_addr))
return;
/* only allow legacy VF drivers to set the hardware MAC if it is zero
* and allow new VF drivers to set the hardware MAC if the type was
* correctly specified over VIRTCHNL
*/
if ((ice_is_vc_addr_legacy(vc_ether_addr) &&
is_zero_ether_addr(vf->hw_lan_addr.addr)) ||
ice_is_vc_addr_primary(vc_ether_addr))
ether_addr_copy(vf->hw_lan_addr.addr, mac_addr);
/* hardware MAC is already set, but its possible that the VF driver sent
* the VIRTCHNL_OP_ADD_ETH_ADDR message before the
* VIRTCHNL_OP_DEL_ETH_ADDR when trying to update its MAC, so save it
* away for the legacy VF driver case as it will be updated in the
* delete flow for this case
*/
if (ice_is_vc_addr_legacy(vc_ether_addr)) {
ether_addr_copy(vf->legacy_last_added_umac.addr,
mac_addr);
vf->legacy_last_added_umac.time_modified = jiffies;
}
}
/**
* ice_vc_add_mac_addr - attempt to add the MAC address passed in
* @vf: pointer to the VF info
* @vsi: pointer to the VF's VSI
* @mac_addr: MAC address to add
* @vc_ether_addr: VIRTCHNL MAC address structure used to add MAC
*/
static int
ice_vc_add_mac_addr(struct ice_vf *vf, struct ice_vsi *vsi, u8 *mac_addr)
ice_vc_add_mac_addr(struct ice_vf *vf, struct ice_vsi *vsi,
struct virtchnl_ether_addr *vc_ether_addr)
{
struct device *dev = ice_pf_to_dev(vf->pf);
u8 *mac_addr = vc_ether_addr->addr;
enum ice_status status;
/* default unicast MAC already added */
if (ether_addr_equal(mac_addr, vf->dflt_lan_addr.addr))
if (ether_addr_equal(mac_addr, vf->hw_lan_addr.addr))
return 0;
if (is_unicast_ether_addr(mac_addr) && !ice_can_vf_change_mac(vf)) {
......@@ -3691,32 +3765,66 @@ ice_vc_add_mac_addr(struct ice_vf *vf, struct ice_vsi *vsi, u8 *mac_addr)
return -EIO;
}
/* Set the default LAN address to the latest unicast MAC address added
* by the VF. The default LAN address is reported by the PF via
* ndo_get_vf_config.
*/
if (is_unicast_ether_addr(mac_addr))
ether_addr_copy(vf->dflt_lan_addr.addr, mac_addr);
ice_vfhw_mac_add(vf, vc_ether_addr);
vf->num_mac++;
return 0;
}
/**
* ice_is_legacy_umac_expired - check if last added legacy unicast MAC expired
* @last_added_umac: structure used to check expiration
*/
static bool ice_is_legacy_umac_expired(struct ice_time_mac *last_added_umac)
{
#define ICE_LEGACY_VF_MAC_CHANGE_EXPIRE_TIME msecs_to_jiffies(3000)
return time_is_before_jiffies(last_added_umac->time_modified +
ICE_LEGACY_VF_MAC_CHANGE_EXPIRE_TIME);
}
/**
* ice_vfhw_mac_del - update the VF's cached hardware MAC if allowed
* @vf: VF to update
* @vc_ether_addr: structure from VIRTCHNL with MAC to delete
*/
static void
ice_vfhw_mac_del(struct ice_vf *vf, struct virtchnl_ether_addr *vc_ether_addr)
{
u8 *mac_addr = vc_ether_addr->addr;
if (!is_valid_ether_addr(mac_addr) ||
!ether_addr_equal(vf->hw_lan_addr.addr, mac_addr))
return;
/* allow the hardware MAC to be repopulated in the add flow */
eth_zero_addr(vf->hw_lan_addr.addr);
/* only update cached hardware MAC for legacy VF drivers on delete
* because we cannot guarantee order/type of MAC from the VF driver
*/
if (ice_is_vc_addr_legacy(vc_ether_addr) &&
!ice_is_legacy_umac_expired(&vf->legacy_last_added_umac))
ether_addr_copy(vf->hw_lan_addr.addr,
vf->legacy_last_added_umac.addr);
}
/**
* ice_vc_del_mac_addr - attempt to delete the MAC address passed in
* @vf: pointer to the VF info
* @vsi: pointer to the VF's VSI
* @mac_addr: MAC address to delete
* @vc_ether_addr: VIRTCHNL MAC address structure used to delete MAC
*/
static int
ice_vc_del_mac_addr(struct ice_vf *vf, struct ice_vsi *vsi, u8 *mac_addr)
ice_vc_del_mac_addr(struct ice_vf *vf, struct ice_vsi *vsi,
struct virtchnl_ether_addr *vc_ether_addr)
{
struct device *dev = ice_pf_to_dev(vf->pf);
u8 *mac_addr = vc_ether_addr->addr;
enum ice_status status;
if (!ice_can_vf_change_mac(vf) &&
ether_addr_equal(mac_addr, vf->dflt_lan_addr.addr))
ether_addr_equal(mac_addr, vf->hw_lan_addr.addr))
return 0;
status = ice_fltr_remove_mac(vsi, mac_addr, ICE_FWD_TO_VSI);
......@@ -3730,8 +3838,7 @@ ice_vc_del_mac_addr(struct ice_vf *vf, struct ice_vsi *vsi, u8 *mac_addr)
return -EIO;
}
if (ether_addr_equal(mac_addr, vf->dflt_lan_addr.addr))
eth_zero_addr(vf->dflt_lan_addr.addr);
ice_vfhw_mac_del(vf, vc_ether_addr);
vf->num_mac--;
......@@ -3750,7 +3857,8 @@ static int
ice_vc_handle_mac_addr_msg(struct ice_vf *vf, u8 *msg, bool set)
{
int (*ice_vc_cfg_mac)
(struct ice_vf *vf, struct ice_vsi *vsi, u8 *mac_addr);
(struct ice_vf *vf, struct ice_vsi *vsi,
struct virtchnl_ether_addr *virtchnl_ether_addr);
enum virtchnl_status_code v_ret = VIRTCHNL_STATUS_SUCCESS;
struct virtchnl_ether_addr_list *al =
(struct virtchnl_ether_addr_list *)msg;
......@@ -3799,7 +3907,7 @@ ice_vc_handle_mac_addr_msg(struct ice_vf *vf, u8 *msg, bool set)
is_zero_ether_addr(mac_addr))
continue;
result = ice_vc_cfg_mac(vf, vsi, mac_addr);
result = ice_vc_cfg_mac(vf, vsi, &al->list[i]);
if (result == -EEXIST || result == -ENOENT) {
continue;
} else if (result) {
......@@ -4437,7 +4545,7 @@ ice_get_vf_cfg(struct net_device *netdev, int vf_id, struct ifla_vf_info *ivi)
return -EBUSY;
ivi->vf = vf_id;
ether_addr_copy(ivi->mac, vf->dflt_lan_addr.addr);
ether_addr_copy(ivi->mac, vf->hw_lan_addr.addr);
/* VF configuration for VLAN and applicable QoS */
ivi->vlan = vf->port_vlan_info & VLAN_VID_MASK;
......@@ -4513,7 +4621,7 @@ int ice_set_vf_mac(struct net_device *netdev, int vf_id, u8 *mac)
vf = &pf->vf[vf_id];
/* nothing left to do, unicast MAC already set */
if (ether_addr_equal(vf->dflt_lan_addr.addr, mac))
if (ether_addr_equal(vf->hw_lan_addr.addr, mac))
return 0;
ret = ice_check_vf_ready_for_cfg(vf);
......@@ -4529,7 +4637,7 @@ int ice_set_vf_mac(struct net_device *netdev, int vf_id, u8 *mac)
/* VF is notified of its new MAC via the PF's response to the
* VIRTCHNL_OP_GET_VF_RESOURCES message after the VF has been reset
*/
ether_addr_copy(vf->dflt_lan_addr.addr, mac);
ether_addr_copy(vf->hw_lan_addr.addr, mac);
if (is_zero_ether_addr(mac)) {
/* VF will send VIRTCHNL_OP_ADD_ETH_ADDR message with its MAC */
vf->pf_set_mac = false;
......@@ -4682,7 +4790,7 @@ void ice_print_vf_rx_mdd_event(struct ice_vf *vf)
dev_info(dev, "%d Rx Malicious Driver Detection events detected on PF %d VF %d MAC %pM. mdd-auto-reset-vfs=%s\n",
vf->mdd_rx_events.count, pf->hw.pf_id, vf->vf_id,
vf->dflt_lan_addr.addr,
vf->hw_lan_addr.addr,
test_bit(ICE_FLAG_MDD_AUTO_RESET_VF, pf->flags)
? "on" : "off");
}
......@@ -4726,7 +4834,7 @@ void ice_print_vfs_mdd_events(struct ice_pf *pf)
dev_info(dev, "%d Tx Malicious Driver Detection events detected on PF %d VF %d MAC %pM.\n",
vf->mdd_tx_events.count, hw->pf_id, i,
vf->dflt_lan_addr.addr);
vf->hw_lan_addr.addr);
}
}
}
......@@ -4816,7 +4924,7 @@ ice_is_malicious_vf(struct ice_pf *pf, struct ice_rq_event_info *event,
if (pf_vsi)
dev_warn(dev, "VF MAC %pM on PF MAC %pM is generating asynchronous messages and may be overflowing the PF message queue. Please see the Adapter User Guide for more information\n",
&vf->dflt_lan_addr.addr[0],
&vf->hw_lan_addr.addr[0],
pf_vsi->netdev->dev_addr);
}
......
......@@ -58,6 +58,11 @@ enum ice_virtchnl_cap {
ICE_VIRTCHNL_VF_CAP_PRIVILEGE,
};
struct ice_time_mac {
unsigned long time_modified;
u8 addr[ETH_ALEN];
};
/* VF MDD events print structure */
struct ice_mdd_vf_events {
u16 count; /* total count of Rx|Tx events */
......@@ -78,7 +83,8 @@ struct ice_vf {
struct ice_sw *vf_sw_id; /* switch ID the VF VSIs connect to */
struct virtchnl_version_info vf_ver;
u32 driver_caps; /* reported by VF driver */
struct virtchnl_ether_addr dflt_lan_addr;
struct virtchnl_ether_addr hw_lan_addr;
struct ice_time_mac legacy_last_added_umac;
DECLARE_BITMAP(txq_ena, ICE_MAX_RSS_QS_PER_VF);
DECLARE_BITMAP(rxq_ena, ICE_MAX_RSS_QS_PER_VF);
u16 port_vlan_info; /* Port VLAN ID and QoS */
......
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