/* Intel Ethernet Switch Host Interface Driver
* Copyright(c) 2013 - 2015 Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* The full GNU General Public License is included in this distribution in
* the file called "COPYING".
*
* Contact Information:
* e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*/
#include "fm10k.h"
#include "fm10k_vf.h"
#include "fm10k_pf.h"
static s32 fm10k_iov_msg_error(struct fm10k_hw *hw, u32 **results,
struct fm10k_mbx_info *mbx)
{
struct fm10k_vf_info *vf_info = (struct fm10k_vf_info *)mbx;
struct fm10k_intfc *interface = hw->back;
struct pci_dev *pdev = interface->pdev;
dev_err(&pdev->dev, "Unknown message ID %u on VF %d\n",
**results & FM10K_TLV_ID_MASK, vf_info->vf_idx);
return fm10k_tlv_msg_error(hw, results, mbx);
}
static const struct fm10k_msg_data iov_mbx_data[] = {
FM10K_TLV_MSG_TEST_HANDLER(fm10k_tlv_msg_test),
FM10K_VF_MSG_MSIX_HANDLER(fm10k_iov_msg_msix_pf),
FM10K_VF_MSG_MAC_VLAN_HANDLER(fm10k_iov_msg_mac_vlan_pf),
FM10K_VF_MSG_LPORT_STATE_HANDLER(fm10k_iov_msg_lport_state_pf),
FM10K_TLV_MSG_ERROR_HANDLER(fm10k_iov_msg_error),
};
s32 fm10k_iov_event(struct fm10k_intfc *interface)
{
struct fm10k_hw *hw = &interface->hw;
struct fm10k_iov_data *iov_data;
s64 vflre;
int i;
/* if there is no iov_data then there is no mailboxes to process */
if (!ACCESS_ONCE(interface->iov_data))
return 0;
rcu_read_lock();
iov_data = interface->iov_data;
/* check again now that we are in the RCU block */
if (!iov_data)
goto read_unlock;
if (!(fm10k_read_reg(hw, FM10K_EICR) & FM10K_EICR_VFLR))
goto read_unlock;
/* read VFLRE to determine if any VFs have been reset */
do {
vflre = fm10k_read_reg(hw, FM10K_PFVFLRE(0));
vflre <<= 32;
vflre |= fm10k_read_reg(hw, FM10K_PFVFLRE(1));
vflre = (vflre << 32) | (vflre >> 32);
vflre |= fm10k_read_reg(hw, FM10K_PFVFLRE(0));
i = iov_data->num_vfs;
for (vflre <<= 64 - i; vflre && i--; vflre += vflre) {
struct fm10k_vf_info *vf_info = &iov_data->vf_info[i];
if (vflre >= 0)
continue;
hw->iov.ops.reset_resources(hw, vf_info);
vf_info->mbx.ops.connect(hw, &vf_info->mbx);
}
} while (i != iov_data->num_vfs);
read_unlock:
rcu_read_unlock();
return 0;
}
s32 fm10k_iov_mbx(struct fm10k_intfc *interface)
{
struct fm10k_hw *hw = &interface->hw;
struct fm10k_iov_data *iov_data;
int i;
/* if there is no iov_data then there is no mailboxes to process */
if (!ACCESS_ONCE(interface->iov_data))
return 0;
rcu_read_lock();
iov_data = interface->iov_data;
/* check again now that we are in the RCU block */
if (!iov_data)
goto read_unlock;
/* lock the mailbox for transmit and receive */
fm10k_mbx_lock(interface);
/* Most VF messages sent to the PF cause the PF to respond by
* requesting from the SM mailbox. This means that too many VF
* messages processed at once could cause a mailbox timeout on the PF.
* To prevent this, store a pointer to the next VF mbx to process. Use
* that as the start of the loop so that we don't starve whichever VF
* got ignored on the previous run.
*/
process_mbx:
for (i = iov_data->next_vf_mbx ? : iov_data->num_vfs; i--;) {
struct fm10k_vf_info *vf_info = &iov_data->vf_info[i];
struct fm10k_mbx_info *mbx = &vf_info->mbx;
u16 glort = vf_info->glort;
/* verify port mapping is valid, if not reset port */
if (vf_info->vf_flags && !fm10k_glort_valid_pf(hw, glort))
hw->iov.ops.reset_lport(hw, vf_info);
/* reset VFs that have mailbox timed out */
if (!mbx->timeout) {
hw->iov.ops.reset_resources(hw, vf_info);
mbx->ops.connect(hw, mbx);
}
/* guarantee we have free space in the SM mailbox */
if (!hw->mbx.ops.tx_ready(&hw->mbx, FM10K_VFMBX_MSG_MTU))
break;
/* cleanup mailbox and process received messages */
mbx->ops.process(hw, mbx);
}
/* if we stopped processing mailboxes early, update next_vf_mbx.
* Otherwise, reset next_vf_mbx, and restart loop so that we process
* the remaining mailboxes we skipped at the start.
*/
if (i >= 0) {
iov_data->next_vf_mbx = i + 1;
} else if (iov_data->next_vf_mbx) {
iov_data->next_vf_mbx = 0;
goto process_mbx;
}
/* free the lock */
fm10k_mbx_unlock(interface);
read_unlock:
rcu_read_unlock();
return 0;
}
void fm10k_iov_suspend(struct pci_dev *pdev)
{
struct fm10k_intfc *interface = pci_get_drvdata(pdev);
struct fm10k_iov_data *iov_data = interface->iov_data;
struct fm10k_hw *hw = &interface->hw;
int num_vfs, i;
/* pull out num_vfs from iov_data */
num_vfs = iov_data ? iov_data->num_vfs : 0;
/* shut down queue mapping for VFs */
fm10k_write_reg(hw, FM10K_DGLORTMAP(fm10k_dglort_vf_rss),
FM10K_DGLORTMAP_NONE);
/* Stop any active VFs and reset their resources */
for (i = 0; i < num_vfs; i++) {
struct fm10k_vf_info *vf_info = &iov_data->vf_info[i];
hw->iov.ops.reset_resources(hw, vf_info);
hw->iov.ops.reset_lport(hw, vf_info);
}
}
int fm10k_iov_resume(struct pci_dev *pdev)
{
struct fm10k_intfc *interface = pci_get_drvdata(pdev);
struct fm10k_iov_data *iov_data = interface->iov_data;
struct fm10k_dglort_cfg dglort = { 0 };
struct fm10k_hw *hw = &interface->hw;
int num_vfs, i;
/* pull out num_vfs from iov_data */
num_vfs = iov_data ? iov_data->num_vfs : 0;
/* return error if iov_data is not already populated */
if (!iov_data)
return -ENOMEM;
/* allocate hardware resources for the VFs */
hw->iov.ops.assign_resources(hw, num_vfs, num_vfs);
/* configure DGLORT mapping for RSS */
dglort.glort = hw->mac.dglort_map & FM10K_DGLORTMAP_NONE;
dglort.idx = fm10k_dglort_vf_rss;
dglort.inner_rss = 1;
dglort.rss_l = fls(fm10k_queues_per_pool(hw) - 1);
dglort.queue_b = fm10k_vf_queue_index(hw, 0);
dglort.vsi_l = fls(hw->iov.total_vfs - 1);
dglort.vsi_b = 1;
hw->mac.ops.configure_dglort_map(hw, &dglort);
/* assign resources to the device */
for (i = 0; i < num_vfs; i++) {
struct fm10k_vf_info *vf_info = &iov_data->vf_info[i];
/* allocate all but the last GLORT to the VFs */
if (i == ((~hw->mac.dglort_map) >> FM10K_DGLORTMAP_MASK_SHIFT))
break;
/* assign GLORT to VF, and restrict it to multicast */
hw->iov.ops.set_lport(hw, vf_info, i,
FM10K_VF_FLAG_MULTI_CAPABLE);
/* assign our default vid to the VF following reset */
vf_info->sw_vid = hw->mac.default_vid;
/* mailbox is disconnected so we don't send a message */
hw->iov.ops.assign_default_mac_vlan(hw, vf_info);
/* now we are ready so we can connect */
vf_info->mbx.ops.connect(hw, &vf_info->mbx);
}
return 0;
}
s32 fm10k_iov_update_pvid(struct fm10k_intfc *interface, u16 glort, u16 pvid)
{
struct fm10k_iov_data *iov_data = interface->iov_data;
struct fm10k_hw *hw = &interface->hw;
struct fm10k_vf_info *vf_info;
u16 vf_idx = (glort - hw->mac.dglort_map) & FM10K_DGLORTMAP_NONE;
/* no IOV support, not our message to process */
if (!iov_data)
return FM10K_ERR_PARAM;
/* glort outside our range, not our message to process */
if (vf_idx >= iov_data->num_vfs)
return FM10K_ERR_PARAM;
/* determine if an update has occurred and if so notify the VF */
vf_info = &iov_data->vf_info[vf_idx];
if (vf_info->sw_vid != pvid) {
vf_info->sw_vid = pvid;
hw->iov.ops.assign_default_mac_vlan(hw, vf_info);
}
return 0;
}
static void fm10k_iov_free_data(struct pci_dev *pdev)
{
struct fm10k_intfc *interface = pci_get_drvdata(pdev);
if (!interface->iov_data)
return;
/* reclaim hardware resources */
fm10k_iov_suspend(pdev);
/* drop iov_data from interface */
kfree_rcu(interface->iov_data, rcu);
interface->iov_data = NULL;
}
static s32 fm10k_iov_alloc_data(struct pci_dev *pdev, int num_vfs)
{
struct fm10k_intfc *interface = pci_get_drvdata(pdev);
struct fm10k_iov_data *iov_data = interface->iov_data;
struct fm10k_hw *hw = &interface->hw;
size_t size;
int i, err;
/* return error if iov_data is already populated */
if (iov_data)
return -EBUSY;
/* The PF should always be able to assign resources */
if (!hw->iov.ops.assign_resources)
return -ENODEV;
/* nothing to do if no VFs are requested */
if (!num_vfs)
return 0;
/* allocate memory for VF storage */
size = offsetof(struct fm10k_iov_data, vf_info[num_vfs]);
iov_data = kzalloc(size, GFP_KERNEL);
if (!iov_data)
return -ENOMEM;
/* record number of VFs */
iov_data->num_vfs = num_vfs;
/* loop through vf_info structures initializing each entry */
for (i = 0; i < num_vfs; i++) {
struct fm10k_vf_info *vf_info = &iov_data->vf_info[i];
/* Record VF VSI value */
vf_info->vsi = i + 1;
vf_info->vf_idx = i;
/* initialize mailbox memory */
err = fm10k_pfvf_mbx_init(hw, &vf_info->mbx, iov_mbx_data, i);
if (err) {
dev_err(&pdev->dev,
"Unable to initialize SR-IOV mailbox\n");
kfree(iov_data);
return err;
}
}
/* assign iov_data to interface */
interface->iov_data = iov_data;
/* allocate hardware resources for the VFs */
fm10k_iov_resume(pdev);
return 0;
}
void fm10k_iov_disable(struct pci_dev *pdev)
{
if (pci_num_vf(pdev) && pci_vfs_assigned(pdev))
dev_err(&pdev->dev,
"Cannot disable SR-IOV while VFs are assigned\n");
else
pci_disable_sriov(pdev);
fm10k_iov_free_data(pdev);
}
static void fm10k_disable_aer_comp_abort(struct pci_dev *pdev)
{
u32 err_sev;
int pos;
pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
if (!pos)
return;
pci_read_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, &err_sev);
err_sev &= ~PCI_ERR_UNC_COMP_ABORT;
pci_write_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, err_sev);
}
int fm10k_iov_configure(struct pci_dev *pdev, int num_vfs)
{
int current_vfs = pci_num_vf(pdev);
int err = 0;
if (current_vfs && pci_vfs_assigned(pdev)) {
dev_err(&pdev->dev,
"Cannot modify SR-IOV while VFs are assigned\n");
num_vfs = current_vfs;
} else {
pci_disable_sriov(pdev);
fm10k_iov_free_data(pdev);
}
/* allocate resources for the VFs */
err = fm10k_iov_alloc_data(pdev, num_vfs);
if (err)
return err;
/* allocate VFs if not already allocated */
if (num_vfs && (num_vfs != current_vfs)) {
/* Disable completer abort error reporting as
* the VFs can trigger this any time they read a queue
* that they don't own.
*/
fm10k_disable_aer_comp_abort(pdev);
err = pci_enable_sriov(pdev, num_vfs);
if (err) {
dev_err(&pdev->dev,
"Enable PCI SR-IOV failed: %d\n", err);
return err;
}
}
return num_vfs;
}
static inline void fm10k_reset_vf_info(struct fm10k_intfc *interface,
struct fm10k_vf_info *vf_info)
{
struct fm10k_hw *hw = &interface->hw;
/* assigning the MAC address will send a mailbox message */
fm10k_mbx_lock(interface);
/* disable LPORT for this VF which clears switch rules */
hw->iov.ops.reset_lport(hw, vf_info);
/* assign new MAC+VLAN for this VF */
hw->iov.ops.assign_default_mac_vlan(hw, vf_info);
/* re-enable the LPORT for this VF */
hw->iov.ops.set_lport(hw, vf_info, vf_info->vf_idx,
FM10K_VF_FLAG_MULTI_CAPABLE);
fm10k_mbx_unlock(interface);
}
int fm10k_ndo_set_vf_mac(struct net_device *netdev, int vf_idx, u8 *mac)
{
struct fm10k_intfc *interface = netdev_priv(netdev);
struct fm10k_iov_data *iov_data = interface->iov_data;
struct fm10k_vf_info *vf_info;
/* verify SR-IOV is active and that vf idx is valid */
if (!iov_data || vf_idx >= iov_data->num_vfs)
return -EINVAL;
/* verify MAC addr is valid */
if (!is_zero_ether_addr(mac) && !is_valid_ether_addr(mac))
return -EINVAL;
/* record new MAC address */
vf_info = &iov_data->vf_info[vf_idx];
ether_addr_copy(vf_info->mac, mac);
fm10k_reset_vf_info(interface, vf_info);
return 0;
}
int fm10k_ndo_set_vf_vlan(struct net_device *netdev, int vf_idx, u16 vid,
u8 qos)
{
struct fm10k_intfc *interface = netdev_priv(netdev);
struct fm10k_iov_data *iov_data = interface->iov_data;
struct fm10k_hw *hw = &interface->hw;
struct fm10k_vf_info *vf_info;
/* verify SR-IOV is active and that vf idx is valid */
if (!iov_data || vf_idx >= iov_data->num_vfs)
return -EINVAL;
/* QOS is unsupported and VLAN IDs accepted range 0-4094 */
if (qos || (vid > (VLAN_VID_MASK - 1)))
return -EINVAL;
vf_info = &iov_data->vf_info[vf_idx];
/* exit if there is nothing to do */
if (vf_info->pf_vid == vid)
return 0;
/* record default VLAN ID for VF */
vf_info->pf_vid = vid;
/* Clear the VLAN table for the VF */
hw->mac.ops.update_vlan(hw, FM10K_VLAN_ALL, vf_info->vsi, false);
fm10k_reset_vf_info(interface, vf_info);
return 0;
}
int fm10k_ndo_set_vf_bw(struct net_device *netdev, int vf_idx,
int __always_unused unused, int rate)
{
struct fm10k_intfc *interface = netdev_priv(netdev);
struct fm10k_iov_data *iov_data = interface->iov_data;
struct fm10k_hw *hw = &interface->hw;
/* verify SR-IOV is active and that vf idx is valid */
if (!iov_data || vf_idx >= iov_data->num_vfs)
return -EINVAL;
/* rate limit cannot be less than 10Mbs or greater than link speed */
if (rate && ((rate < FM10K_VF_TC_MIN) || rate > FM10K_VF_TC_MAX))
return -EINVAL;
/* store values */
iov_data->vf_info[vf_idx].rate = rate;
/* update hardware configuration */
hw->iov.ops.configure_tc(hw, vf_idx, rate);
return 0;
}
int fm10k_ndo_get_vf_config(struct net_device *netdev,
int vf_idx, struct ifla_vf_info *ivi)
{
struct fm10k_intfc *interface = netdev_priv(netdev);
struct fm10k_iov_data *iov_data = interface->iov_data;
struct fm10k_vf_info *vf_info;
/* verify SR-IOV is active and that vf idx is valid */
if (!iov_data || vf_idx >= iov_data->num_vfs)
return -EINVAL;
vf_info = &iov_data->vf_info[vf_idx];
ivi->vf = vf_idx;
ivi->max_tx_rate = vf_info->rate;
ivi->min_tx_rate = 0;
ether_addr_copy(ivi->mac, vf_info->mac);
ivi->vlan = vf_info->pf_vid;
ivi->qos = 0;
return 0;
}
