534 lines
14 KiB
C
534 lines
14 KiB
C
/* Intel(R) Ethernet Switch Host Interface Driver
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* Copyright(c) 2013 - 2016 Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* The full GNU General Public License is included in this distribution in
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* the file called "COPYING".
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*
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* Contact Information:
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* e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
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* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*/
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#include "fm10k.h"
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#include "fm10k_vf.h"
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#include "fm10k_pf.h"
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static s32 fm10k_iov_msg_error(struct fm10k_hw *hw, u32 **results,
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struct fm10k_mbx_info *mbx)
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{
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struct fm10k_vf_info *vf_info = (struct fm10k_vf_info *)mbx;
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struct fm10k_intfc *interface = hw->back;
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struct pci_dev *pdev = interface->pdev;
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dev_err(&pdev->dev, "Unknown message ID %u on VF %d\n",
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**results & FM10K_TLV_ID_MASK, vf_info->vf_idx);
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return fm10k_tlv_msg_error(hw, results, mbx);
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}
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static const struct fm10k_msg_data iov_mbx_data[] = {
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FM10K_TLV_MSG_TEST_HANDLER(fm10k_tlv_msg_test),
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FM10K_VF_MSG_MSIX_HANDLER(fm10k_iov_msg_msix_pf),
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FM10K_VF_MSG_MAC_VLAN_HANDLER(fm10k_iov_msg_mac_vlan_pf),
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FM10K_VF_MSG_LPORT_STATE_HANDLER(fm10k_iov_msg_lport_state_pf),
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FM10K_TLV_MSG_ERROR_HANDLER(fm10k_iov_msg_error),
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};
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s32 fm10k_iov_event(struct fm10k_intfc *interface)
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{
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struct fm10k_hw *hw = &interface->hw;
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struct fm10k_iov_data *iov_data;
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s64 vflre;
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int i;
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/* if there is no iov_data then there is no mailbox to process */
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if (!READ_ONCE(interface->iov_data))
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return 0;
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rcu_read_lock();
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iov_data = interface->iov_data;
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/* check again now that we are in the RCU block */
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if (!iov_data)
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goto read_unlock;
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if (!(fm10k_read_reg(hw, FM10K_EICR) & FM10K_EICR_VFLR))
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goto read_unlock;
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/* read VFLRE to determine if any VFs have been reset */
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do {
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vflre = fm10k_read_reg(hw, FM10K_PFVFLRE(0));
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vflre <<= 32;
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vflre |= fm10k_read_reg(hw, FM10K_PFVFLRE(1));
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vflre = (vflre << 32) | (vflre >> 32);
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vflre |= fm10k_read_reg(hw, FM10K_PFVFLRE(0));
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i = iov_data->num_vfs;
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for (vflre <<= 64 - i; vflre && i--; vflre += vflre) {
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struct fm10k_vf_info *vf_info = &iov_data->vf_info[i];
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if (vflre >= 0)
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continue;
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hw->iov.ops.reset_resources(hw, vf_info);
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vf_info->mbx.ops.connect(hw, &vf_info->mbx);
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}
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} while (i != iov_data->num_vfs);
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read_unlock:
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rcu_read_unlock();
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return 0;
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}
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s32 fm10k_iov_mbx(struct fm10k_intfc *interface)
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{
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struct fm10k_hw *hw = &interface->hw;
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struct fm10k_iov_data *iov_data;
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int i;
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/* if there is no iov_data then there is no mailbox to process */
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if (!READ_ONCE(interface->iov_data))
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return 0;
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rcu_read_lock();
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iov_data = interface->iov_data;
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/* check again now that we are in the RCU block */
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if (!iov_data)
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goto read_unlock;
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/* lock the mailbox for transmit and receive */
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fm10k_mbx_lock(interface);
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/* Most VF messages sent to the PF cause the PF to respond by
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* requesting from the SM mailbox. This means that too many VF
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* messages processed at once could cause a mailbox timeout on the PF.
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* To prevent this, store a pointer to the next VF mbx to process. Use
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* that as the start of the loop so that we don't starve whichever VF
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* got ignored on the previous run.
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*/
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process_mbx:
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for (i = iov_data->next_vf_mbx ? : iov_data->num_vfs; i--;) {
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struct fm10k_vf_info *vf_info = &iov_data->vf_info[i];
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struct fm10k_mbx_info *mbx = &vf_info->mbx;
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u16 glort = vf_info->glort;
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/* process the SM mailbox first to drain outgoing messages */
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hw->mbx.ops.process(hw, &hw->mbx);
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/* verify port mapping is valid, if not reset port */
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if (vf_info->vf_flags && !fm10k_glort_valid_pf(hw, glort))
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hw->iov.ops.reset_lport(hw, vf_info);
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/* reset VFs that have mailbox timed out */
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if (!mbx->timeout) {
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hw->iov.ops.reset_resources(hw, vf_info);
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mbx->ops.connect(hw, mbx);
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}
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/* guarantee we have free space in the SM mailbox */
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if (!hw->mbx.ops.tx_ready(&hw->mbx, FM10K_VFMBX_MSG_MTU)) {
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/* keep track of how many times this occurs */
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interface->hw_sm_mbx_full++;
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break;
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}
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/* cleanup mailbox and process received messages */
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mbx->ops.process(hw, mbx);
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}
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/* if we stopped processing mailboxes early, update next_vf_mbx.
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* Otherwise, reset next_vf_mbx, and restart loop so that we process
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* the remaining mailboxes we skipped at the start.
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*/
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if (i >= 0) {
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iov_data->next_vf_mbx = i + 1;
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} else if (iov_data->next_vf_mbx) {
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iov_data->next_vf_mbx = 0;
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goto process_mbx;
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}
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/* free the lock */
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fm10k_mbx_unlock(interface);
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read_unlock:
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rcu_read_unlock();
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return 0;
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}
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void fm10k_iov_suspend(struct pci_dev *pdev)
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{
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struct fm10k_intfc *interface = pci_get_drvdata(pdev);
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struct fm10k_iov_data *iov_data = interface->iov_data;
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struct fm10k_hw *hw = &interface->hw;
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int num_vfs, i;
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/* pull out num_vfs from iov_data */
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num_vfs = iov_data ? iov_data->num_vfs : 0;
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/* shut down queue mapping for VFs */
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fm10k_write_reg(hw, FM10K_DGLORTMAP(fm10k_dglort_vf_rss),
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FM10K_DGLORTMAP_NONE);
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/* Stop any active VFs and reset their resources */
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for (i = 0; i < num_vfs; i++) {
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struct fm10k_vf_info *vf_info = &iov_data->vf_info[i];
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hw->iov.ops.reset_resources(hw, vf_info);
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hw->iov.ops.reset_lport(hw, vf_info);
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}
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}
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int fm10k_iov_resume(struct pci_dev *pdev)
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{
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struct fm10k_intfc *interface = pci_get_drvdata(pdev);
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struct fm10k_iov_data *iov_data = interface->iov_data;
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struct fm10k_dglort_cfg dglort = { 0 };
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struct fm10k_hw *hw = &interface->hw;
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int num_vfs, i;
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/* pull out num_vfs from iov_data */
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num_vfs = iov_data ? iov_data->num_vfs : 0;
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/* return error if iov_data is not already populated */
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if (!iov_data)
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return -ENOMEM;
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/* allocate hardware resources for the VFs */
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hw->iov.ops.assign_resources(hw, num_vfs, num_vfs);
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/* configure DGLORT mapping for RSS */
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dglort.glort = hw->mac.dglort_map & FM10K_DGLORTMAP_NONE;
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dglort.idx = fm10k_dglort_vf_rss;
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dglort.inner_rss = 1;
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dglort.rss_l = fls(fm10k_queues_per_pool(hw) - 1);
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dglort.queue_b = fm10k_vf_queue_index(hw, 0);
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dglort.vsi_l = fls(hw->iov.total_vfs - 1);
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dglort.vsi_b = 1;
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hw->mac.ops.configure_dglort_map(hw, &dglort);
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/* assign resources to the device */
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for (i = 0; i < num_vfs; i++) {
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struct fm10k_vf_info *vf_info = &iov_data->vf_info[i];
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/* allocate all but the last GLORT to the VFs */
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if (i == ((~hw->mac.dglort_map) >> FM10K_DGLORTMAP_MASK_SHIFT))
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break;
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/* assign GLORT to VF, and restrict it to multicast */
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hw->iov.ops.set_lport(hw, vf_info, i,
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FM10K_VF_FLAG_MULTI_CAPABLE);
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/* mailbox is disconnected so we don't send a message */
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hw->iov.ops.assign_default_mac_vlan(hw, vf_info);
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/* now we are ready so we can connect */
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vf_info->mbx.ops.connect(hw, &vf_info->mbx);
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}
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return 0;
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}
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s32 fm10k_iov_update_pvid(struct fm10k_intfc *interface, u16 glort, u16 pvid)
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{
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struct fm10k_iov_data *iov_data = interface->iov_data;
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struct fm10k_hw *hw = &interface->hw;
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struct fm10k_vf_info *vf_info;
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u16 vf_idx = (glort - hw->mac.dglort_map) & FM10K_DGLORTMAP_NONE;
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/* no IOV support, not our message to process */
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if (!iov_data)
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return FM10K_ERR_PARAM;
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/* glort outside our range, not our message to process */
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if (vf_idx >= iov_data->num_vfs)
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return FM10K_ERR_PARAM;
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/* determine if an update has occurred and if so notify the VF */
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vf_info = &iov_data->vf_info[vf_idx];
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if (vf_info->sw_vid != pvid) {
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vf_info->sw_vid = pvid;
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hw->iov.ops.assign_default_mac_vlan(hw, vf_info);
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}
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return 0;
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}
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static void fm10k_iov_free_data(struct pci_dev *pdev)
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{
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struct fm10k_intfc *interface = pci_get_drvdata(pdev);
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if (!interface->iov_data)
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return;
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/* reclaim hardware resources */
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fm10k_iov_suspend(pdev);
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/* drop iov_data from interface */
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kfree_rcu(interface->iov_data, rcu);
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interface->iov_data = NULL;
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}
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static s32 fm10k_iov_alloc_data(struct pci_dev *pdev, int num_vfs)
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{
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struct fm10k_intfc *interface = pci_get_drvdata(pdev);
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struct fm10k_iov_data *iov_data = interface->iov_data;
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struct fm10k_hw *hw = &interface->hw;
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size_t size;
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int i, err;
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/* return error if iov_data is already populated */
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if (iov_data)
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return -EBUSY;
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/* The PF should always be able to assign resources */
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if (!hw->iov.ops.assign_resources)
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return -ENODEV;
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/* nothing to do if no VFs are requested */
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if (!num_vfs)
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return 0;
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/* allocate memory for VF storage */
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size = offsetof(struct fm10k_iov_data, vf_info[num_vfs]);
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iov_data = kzalloc(size, GFP_KERNEL);
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if (!iov_data)
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return -ENOMEM;
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/* record number of VFs */
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iov_data->num_vfs = num_vfs;
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/* loop through vf_info structures initializing each entry */
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for (i = 0; i < num_vfs; i++) {
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struct fm10k_vf_info *vf_info = &iov_data->vf_info[i];
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/* Record VF VSI value */
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vf_info->vsi = i + 1;
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vf_info->vf_idx = i;
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/* initialize mailbox memory */
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err = fm10k_pfvf_mbx_init(hw, &vf_info->mbx, iov_mbx_data, i);
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if (err) {
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dev_err(&pdev->dev,
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"Unable to initialize SR-IOV mailbox\n");
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kfree(iov_data);
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return err;
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}
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}
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/* assign iov_data to interface */
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interface->iov_data = iov_data;
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/* allocate hardware resources for the VFs */
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fm10k_iov_resume(pdev);
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return 0;
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}
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void fm10k_iov_disable(struct pci_dev *pdev)
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{
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if (pci_num_vf(pdev) && pci_vfs_assigned(pdev))
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dev_err(&pdev->dev,
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"Cannot disable SR-IOV while VFs are assigned\n");
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else
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pci_disable_sriov(pdev);
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fm10k_iov_free_data(pdev);
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}
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static void fm10k_disable_aer_comp_abort(struct pci_dev *pdev)
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{
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u32 err_sev;
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int pos;
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pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
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if (!pos)
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return;
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pci_read_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, &err_sev);
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err_sev &= ~PCI_ERR_UNC_COMP_ABORT;
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pci_write_config_dword(pdev, pos + PCI_ERR_UNCOR_SEVER, err_sev);
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}
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int fm10k_iov_configure(struct pci_dev *pdev, int num_vfs)
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{
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int current_vfs = pci_num_vf(pdev);
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int err = 0;
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if (current_vfs && pci_vfs_assigned(pdev)) {
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dev_err(&pdev->dev,
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"Cannot modify SR-IOV while VFs are assigned\n");
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num_vfs = current_vfs;
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} else {
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pci_disable_sriov(pdev);
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fm10k_iov_free_data(pdev);
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}
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/* allocate resources for the VFs */
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err = fm10k_iov_alloc_data(pdev, num_vfs);
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if (err)
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return err;
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/* allocate VFs if not already allocated */
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if (num_vfs && (num_vfs != current_vfs)) {
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/* Disable completer abort error reporting as
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* the VFs can trigger this any time they read a queue
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* that they don't own.
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*/
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fm10k_disable_aer_comp_abort(pdev);
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err = pci_enable_sriov(pdev, num_vfs);
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if (err) {
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dev_err(&pdev->dev,
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"Enable PCI SR-IOV failed: %d\n", err);
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return err;
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}
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}
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return num_vfs;
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}
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static inline void fm10k_reset_vf_info(struct fm10k_intfc *interface,
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struct fm10k_vf_info *vf_info)
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{
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struct fm10k_hw *hw = &interface->hw;
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/* assigning the MAC address will send a mailbox message */
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fm10k_mbx_lock(interface);
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/* disable LPORT for this VF which clears switch rules */
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hw->iov.ops.reset_lport(hw, vf_info);
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/* assign new MAC+VLAN for this VF */
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hw->iov.ops.assign_default_mac_vlan(hw, vf_info);
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/* re-enable the LPORT for this VF */
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hw->iov.ops.set_lport(hw, vf_info, vf_info->vf_idx,
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FM10K_VF_FLAG_MULTI_CAPABLE);
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fm10k_mbx_unlock(interface);
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}
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int fm10k_ndo_set_vf_mac(struct net_device *netdev, int vf_idx, u8 *mac)
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{
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struct fm10k_intfc *interface = netdev_priv(netdev);
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struct fm10k_iov_data *iov_data = interface->iov_data;
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struct fm10k_vf_info *vf_info;
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/* verify SR-IOV is active and that vf idx is valid */
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if (!iov_data || vf_idx >= iov_data->num_vfs)
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return -EINVAL;
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/* verify MAC addr is valid */
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if (!is_zero_ether_addr(mac) && !is_valid_ether_addr(mac))
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return -EINVAL;
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/* record new MAC address */
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vf_info = &iov_data->vf_info[vf_idx];
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ether_addr_copy(vf_info->mac, mac);
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fm10k_reset_vf_info(interface, vf_info);
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return 0;
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}
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int fm10k_ndo_set_vf_vlan(struct net_device *netdev, int vf_idx, u16 vid,
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u8 qos, __be16 vlan_proto)
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{
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struct fm10k_intfc *interface = netdev_priv(netdev);
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struct fm10k_iov_data *iov_data = interface->iov_data;
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struct fm10k_hw *hw = &interface->hw;
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struct fm10k_vf_info *vf_info;
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/* verify SR-IOV is active and that vf idx is valid */
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if (!iov_data || vf_idx >= iov_data->num_vfs)
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return -EINVAL;
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/* QOS is unsupported and VLAN IDs accepted range 0-4094 */
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if (qos || (vid > (VLAN_VID_MASK - 1)))
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return -EINVAL;
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/* VF VLAN Protocol part to default is unsupported */
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if (vlan_proto != htons(ETH_P_8021Q))
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return -EPROTONOSUPPORT;
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vf_info = &iov_data->vf_info[vf_idx];
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/* exit if there is nothing to do */
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if (vf_info->pf_vid == vid)
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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 min_rate, int max_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 (max_rate &&
|
|
(max_rate < FM10K_VF_TC_MIN || max_rate > FM10K_VF_TC_MAX))
|
|
return -EINVAL;
|
|
|
|
/* store values */
|
|
iov_data->vf_info[vf_idx].rate = max_rate;
|
|
|
|
/* update hardware configuration */
|
|
hw->iov.ops.configure_tc(hw, vf_idx, max_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;
|
|
}
|