--- /dev/null
+/* 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;
+}
+
+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_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;
+
+ /* 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);
+
+ /* assigning the MAC will send a mailbox message so lock is needed */
+ fm10k_mbx_lock(interface);
+
+ /* assign MAC address to VF */
+ hw->iov.ops.assign_default_mac_vlan(hw, vf_info);
+
+ fm10k_mbx_unlock(interface);
+
+ 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;
+
+ /* assigning the VLAN will send a mailbox message so lock is needed */
+ fm10k_mbx_lock(interface);
+
+ /* Clear the VLAN table for the VF */
+ hw->mac.ops.update_vlan(hw, FM10K_VLAN_ALL, vf_info->vsi, false);
+
+ /* Update VF assignment and trigger reset */
+ hw->iov.ops.assign_default_mac_vlan(hw, vf_info);
+
+ fm10k_mbx_unlock(interface);
+
+ 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;
+}
Code Review / kvmfornfv.git / blobdiff