![Arnd Bergmann](/assets/img/avatar_default.png)
A cleanup of the PM code left an incorrect #ifdef in place, leading
to a harmless build warning:
drivers/net/ethernet/intel/fm10k/fm10k_pci.c:2502:12: error: 'fm10k_suspend' defined but not used [-Werror=unused-function]
drivers/net/ethernet/intel/fm10k/fm10k_pci.c:2475:12: error: 'fm10k_resume' defined but not used [-Werror=unused-function]
It's easier to use __maybe_unused attributes here, since you
can't pick the wrong one.
Fixes: 8249c47c6b
("fm10k: use generic PM hooks instead of legacy PCIe power hooks")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Krishneil Singh <krishneil.k.singh@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2669 lines
74 KiB
C
2669 lines
74 KiB
C
/* Intel(R) Ethernet Switch Host Interface Driver
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* Copyright(c) 2013 - 2017 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 <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/aer.h>
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#include "fm10k.h"
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static const struct fm10k_info *fm10k_info_tbl[] = {
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[fm10k_device_pf] = &fm10k_pf_info,
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[fm10k_device_vf] = &fm10k_vf_info,
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};
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/**
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* fm10k_pci_tbl - PCI Device ID Table
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*
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* Wildcard entries (PCI_ANY_ID) should come last
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* Last entry must be all 0s
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*
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* { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
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* Class, Class Mask, private data (not used) }
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*/
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static const struct pci_device_id fm10k_pci_tbl[] = {
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{ PCI_VDEVICE(INTEL, FM10K_DEV_ID_PF), fm10k_device_pf },
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{ PCI_VDEVICE(INTEL, FM10K_DEV_ID_VF), fm10k_device_vf },
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/* required last entry */
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{ 0, }
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};
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MODULE_DEVICE_TABLE(pci, fm10k_pci_tbl);
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u16 fm10k_read_pci_cfg_word(struct fm10k_hw *hw, u32 reg)
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{
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struct fm10k_intfc *interface = hw->back;
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u16 value = 0;
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if (FM10K_REMOVED(hw->hw_addr))
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return ~value;
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pci_read_config_word(interface->pdev, reg, &value);
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if (value == 0xFFFF)
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fm10k_write_flush(hw);
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return value;
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}
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u32 fm10k_read_reg(struct fm10k_hw *hw, int reg)
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{
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u32 __iomem *hw_addr = READ_ONCE(hw->hw_addr);
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u32 value = 0;
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if (FM10K_REMOVED(hw_addr))
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return ~value;
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value = readl(&hw_addr[reg]);
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if (!(~value) && (!reg || !(~readl(hw_addr)))) {
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struct fm10k_intfc *interface = hw->back;
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struct net_device *netdev = interface->netdev;
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hw->hw_addr = NULL;
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netif_device_detach(netdev);
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netdev_err(netdev, "PCIe link lost, device now detached\n");
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}
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return value;
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}
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static int fm10k_hw_ready(struct fm10k_intfc *interface)
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{
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struct fm10k_hw *hw = &interface->hw;
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fm10k_write_flush(hw);
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return FM10K_REMOVED(hw->hw_addr) ? -ENODEV : 0;
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}
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/**
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* fm10k_macvlan_schedule - Schedule MAC/VLAN queue task
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* @interface: fm10k private interface structure
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*
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* Schedule the MAC/VLAN queue monitor task. If the MAC/VLAN task cannot be
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* started immediately, request that it be restarted when possible.
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*/
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void fm10k_macvlan_schedule(struct fm10k_intfc *interface)
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{
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/* Avoid processing the MAC/VLAN queue when the service task is
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* disabled, or when we're resetting the device.
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*/
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if (!test_bit(__FM10K_MACVLAN_DISABLE, interface->state) &&
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!test_and_set_bit(__FM10K_MACVLAN_SCHED, interface->state)) {
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clear_bit(__FM10K_MACVLAN_REQUEST, interface->state);
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/* We delay the actual start of execution in order to allow
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* multiple MAC/VLAN updates to accumulate before handling
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* them, and to allow some time to let the mailbox drain
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* between runs.
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*/
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queue_delayed_work(fm10k_workqueue,
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&interface->macvlan_task, 10);
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} else {
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set_bit(__FM10K_MACVLAN_REQUEST, interface->state);
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}
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}
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/**
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* fm10k_stop_macvlan_task - Stop the MAC/VLAN queue monitor
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* @interface: fm10k private interface structure
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*
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* Wait until the MAC/VLAN queue task has stopped, and cancel any future
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* requests.
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*/
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static void fm10k_stop_macvlan_task(struct fm10k_intfc *interface)
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{
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/* Disable the MAC/VLAN work item */
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set_bit(__FM10K_MACVLAN_DISABLE, interface->state);
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/* Make sure we waited until any current invocations have stopped */
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cancel_delayed_work_sync(&interface->macvlan_task);
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/* We set the __FM10K_MACVLAN_SCHED bit when we schedule the task.
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* However, it may not be unset of the MAC/VLAN task never actually
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* got a chance to run. Since we've canceled the task here, and it
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* cannot be rescheuled right now, we need to ensure the scheduled bit
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* gets unset.
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*/
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clear_bit(__FM10K_MACVLAN_SCHED, interface->state);
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}
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/**
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* fm10k_resume_macvlan_task - Restart the MAC/VLAN queue monitor
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* @interface: fm10k private interface structure
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*
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* Clear the __FM10K_MACVLAN_DISABLE bit and, if a request occurred, schedule
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* the MAC/VLAN work monitor.
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*/
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static void fm10k_resume_macvlan_task(struct fm10k_intfc *interface)
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{
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/* Re-enable the MAC/VLAN work item */
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clear_bit(__FM10K_MACVLAN_DISABLE, interface->state);
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/* We might have received a MAC/VLAN request while disabled. If so,
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* kick off the queue now.
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*/
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if (test_bit(__FM10K_MACVLAN_REQUEST, interface->state))
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fm10k_macvlan_schedule(interface);
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}
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void fm10k_service_event_schedule(struct fm10k_intfc *interface)
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{
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if (!test_bit(__FM10K_SERVICE_DISABLE, interface->state) &&
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!test_and_set_bit(__FM10K_SERVICE_SCHED, interface->state)) {
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clear_bit(__FM10K_SERVICE_REQUEST, interface->state);
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queue_work(fm10k_workqueue, &interface->service_task);
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} else {
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set_bit(__FM10K_SERVICE_REQUEST, interface->state);
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}
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}
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static void fm10k_service_event_complete(struct fm10k_intfc *interface)
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{
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WARN_ON(!test_bit(__FM10K_SERVICE_SCHED, interface->state));
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/* flush memory to make sure state is correct before next watchog */
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smp_mb__before_atomic();
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clear_bit(__FM10K_SERVICE_SCHED, interface->state);
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/* If a service event was requested since we started, immediately
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* re-schedule now. This ensures we don't drop a request until the
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* next timer event.
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*/
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if (test_bit(__FM10K_SERVICE_REQUEST, interface->state))
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fm10k_service_event_schedule(interface);
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}
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static void fm10k_stop_service_event(struct fm10k_intfc *interface)
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{
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set_bit(__FM10K_SERVICE_DISABLE, interface->state);
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cancel_work_sync(&interface->service_task);
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/* It's possible that cancel_work_sync stopped the service task from
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* running before it could actually start. In this case the
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* __FM10K_SERVICE_SCHED bit will never be cleared. Since we know that
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* the service task cannot be running at this point, we need to clear
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* the scheduled bit, as otherwise the service task may never be
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* restarted.
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*/
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clear_bit(__FM10K_SERVICE_SCHED, interface->state);
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}
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static void fm10k_start_service_event(struct fm10k_intfc *interface)
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{
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clear_bit(__FM10K_SERVICE_DISABLE, interface->state);
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fm10k_service_event_schedule(interface);
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}
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/**
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* fm10k_service_timer - Timer Call-back
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* @data: pointer to interface cast into an unsigned long
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**/
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static void fm10k_service_timer(struct timer_list *t)
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{
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struct fm10k_intfc *interface = from_timer(interface, t,
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service_timer);
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/* Reset the timer */
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mod_timer(&interface->service_timer, (HZ * 2) + jiffies);
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fm10k_service_event_schedule(interface);
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}
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/**
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* fm10k_prepare_for_reset - Prepare the driver and device for a pending reset
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* @interface: fm10k private data structure
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*
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* This function prepares for a device reset by shutting as much down as we
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* can. It does nothing and returns false if __FM10K_RESETTING was already set
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* prior to calling this function. It returns true if it actually did work.
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*/
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static bool fm10k_prepare_for_reset(struct fm10k_intfc *interface)
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{
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struct net_device *netdev = interface->netdev;
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WARN_ON(in_interrupt());
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/* put off any impending NetWatchDogTimeout */
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netif_trans_update(netdev);
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/* Nothing to do if a reset is already in progress */
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if (test_and_set_bit(__FM10K_RESETTING, interface->state))
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return false;
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/* As the MAC/VLAN task will be accessing registers it must not be
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* running while we reset. Although the task will not be scheduled
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* once we start resetting it may already be running
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*/
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fm10k_stop_macvlan_task(interface);
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rtnl_lock();
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fm10k_iov_suspend(interface->pdev);
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if (netif_running(netdev))
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fm10k_close(netdev);
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fm10k_mbx_free_irq(interface);
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/* free interrupts */
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fm10k_clear_queueing_scheme(interface);
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/* delay any future reset requests */
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interface->last_reset = jiffies + (10 * HZ);
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rtnl_unlock();
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return true;
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}
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static int fm10k_handle_reset(struct fm10k_intfc *interface)
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{
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struct net_device *netdev = interface->netdev;
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struct fm10k_hw *hw = &interface->hw;
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int err;
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WARN_ON(!test_bit(__FM10K_RESETTING, interface->state));
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rtnl_lock();
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pci_set_master(interface->pdev);
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/* reset and initialize the hardware so it is in a known state */
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err = hw->mac.ops.reset_hw(hw);
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if (err) {
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dev_err(&interface->pdev->dev, "reset_hw failed: %d\n", err);
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goto reinit_err;
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}
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err = hw->mac.ops.init_hw(hw);
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if (err) {
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dev_err(&interface->pdev->dev, "init_hw failed: %d\n", err);
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goto reinit_err;
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}
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err = fm10k_init_queueing_scheme(interface);
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if (err) {
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dev_err(&interface->pdev->dev,
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"init_queueing_scheme failed: %d\n", err);
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goto reinit_err;
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}
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/* re-associate interrupts */
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err = fm10k_mbx_request_irq(interface);
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if (err)
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goto err_mbx_irq;
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err = fm10k_hw_ready(interface);
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if (err)
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goto err_open;
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/* update hardware address for VFs if perm_addr has changed */
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if (hw->mac.type == fm10k_mac_vf) {
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if (is_valid_ether_addr(hw->mac.perm_addr)) {
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ether_addr_copy(hw->mac.addr, hw->mac.perm_addr);
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ether_addr_copy(netdev->perm_addr, hw->mac.perm_addr);
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ether_addr_copy(netdev->dev_addr, hw->mac.perm_addr);
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netdev->addr_assign_type &= ~NET_ADDR_RANDOM;
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}
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if (hw->mac.vlan_override)
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netdev->features &= ~NETIF_F_HW_VLAN_CTAG_RX;
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else
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netdev->features |= NETIF_F_HW_VLAN_CTAG_RX;
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}
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err = netif_running(netdev) ? fm10k_open(netdev) : 0;
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if (err)
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goto err_open;
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fm10k_iov_resume(interface->pdev);
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rtnl_unlock();
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fm10k_resume_macvlan_task(interface);
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clear_bit(__FM10K_RESETTING, interface->state);
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return err;
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err_open:
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fm10k_mbx_free_irq(interface);
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err_mbx_irq:
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fm10k_clear_queueing_scheme(interface);
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reinit_err:
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netif_device_detach(netdev);
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rtnl_unlock();
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clear_bit(__FM10K_RESETTING, interface->state);
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return err;
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}
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static void fm10k_detach_subtask(struct fm10k_intfc *interface)
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{
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struct net_device *netdev = interface->netdev;
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u32 __iomem *hw_addr;
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u32 value;
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int err;
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/* do nothing if netdev is still present or hw_addr is set */
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if (netif_device_present(netdev) || interface->hw.hw_addr)
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return;
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/* We've lost the PCIe register space, and can no longer access the
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* device. Shut everything except the detach subtask down and prepare
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* to reset the device in case we recover. If we actually prepare for
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* reset, indicate that we're detached.
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*/
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if (fm10k_prepare_for_reset(interface))
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set_bit(__FM10K_RESET_DETACHED, interface->state);
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/* check the real address space to see if we've recovered */
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hw_addr = READ_ONCE(interface->uc_addr);
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value = readl(hw_addr);
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if (~value) {
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/* Make sure the reset was initiated because we detached,
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* otherwise we might race with a different reset flow.
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*/
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if (!test_and_clear_bit(__FM10K_RESET_DETACHED,
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interface->state))
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return;
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/* Restore the hardware address */
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interface->hw.hw_addr = interface->uc_addr;
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/* PCIe link has been restored, and the device is active
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* again. Restore everything and reset the device.
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*/
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err = fm10k_handle_reset(interface);
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if (err) {
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netdev_err(netdev, "Unable to reset device: %d\n", err);
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interface->hw.hw_addr = NULL;
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return;
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}
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/* Re-attach the netdev */
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netif_device_attach(netdev);
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netdev_warn(netdev, "PCIe link restored, device now attached\n");
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return;
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}
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}
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static void fm10k_reset_subtask(struct fm10k_intfc *interface)
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{
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int err;
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if (!test_and_clear_bit(FM10K_FLAG_RESET_REQUESTED,
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interface->flags))
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return;
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/* If another thread has already prepared to reset the device, we
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* should not attempt to handle a reset here, since we'd race with
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* that thread. This may happen if we suspend the device or if the
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* PCIe link is lost. In this case, we'll just ignore the RESET
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* request, as it will (eventually) be taken care of when the thread
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* which actually started the reset is finished.
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*/
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if (!fm10k_prepare_for_reset(interface))
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return;
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netdev_err(interface->netdev, "Reset interface\n");
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err = fm10k_handle_reset(interface);
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if (err)
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dev_err(&interface->pdev->dev,
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"fm10k_handle_reset failed: %d\n", err);
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}
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/**
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* fm10k_configure_swpri_map - Configure Receive SWPRI to PC mapping
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* @interface: board private structure
|
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*
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* Configure the SWPRI to PC mapping for the port.
|
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**/
|
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static void fm10k_configure_swpri_map(struct fm10k_intfc *interface)
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{
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struct net_device *netdev = interface->netdev;
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struct fm10k_hw *hw = &interface->hw;
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int i;
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/* clear flag indicating update is needed */
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clear_bit(FM10K_FLAG_SWPRI_CONFIG, interface->flags);
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/* these registers are only available on the PF */
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if (hw->mac.type != fm10k_mac_pf)
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return;
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|
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/* configure SWPRI to PC map */
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for (i = 0; i < FM10K_SWPRI_MAX; i++)
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fm10k_write_reg(hw, FM10K_SWPRI_MAP(i),
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netdev_get_prio_tc_map(netdev, i));
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}
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|
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/**
|
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* fm10k_watchdog_update_host_state - Update the link status based on host.
|
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* @interface: board private structure
|
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**/
|
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static void fm10k_watchdog_update_host_state(struct fm10k_intfc *interface)
|
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{
|
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struct fm10k_hw *hw = &interface->hw;
|
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s32 err;
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|
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if (test_bit(__FM10K_LINK_DOWN, interface->state)) {
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interface->host_ready = false;
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if (time_is_after_jiffies(interface->link_down_event))
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return;
|
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clear_bit(__FM10K_LINK_DOWN, interface->state);
|
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}
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|
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if (test_bit(FM10K_FLAG_SWPRI_CONFIG, interface->flags)) {
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if (rtnl_trylock()) {
|
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fm10k_configure_swpri_map(interface);
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rtnl_unlock();
|
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}
|
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}
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|
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/* lock the mailbox for transmit and receive */
|
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fm10k_mbx_lock(interface);
|
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|
|
err = hw->mac.ops.get_host_state(hw, &interface->host_ready);
|
|
if (err && time_is_before_jiffies(interface->last_reset))
|
|
set_bit(FM10K_FLAG_RESET_REQUESTED, interface->flags);
|
|
|
|
/* free the lock */
|
|
fm10k_mbx_unlock(interface);
|
|
}
|
|
|
|
/**
|
|
* fm10k_mbx_subtask - Process upstream and downstream mailboxes
|
|
* @interface: board private structure
|
|
*
|
|
* This function will process both the upstream and downstream mailboxes.
|
|
**/
|
|
static void fm10k_mbx_subtask(struct fm10k_intfc *interface)
|
|
{
|
|
/* If we're resetting, bail out */
|
|
if (test_bit(__FM10K_RESETTING, interface->state))
|
|
return;
|
|
|
|
/* process upstream mailbox and update device state */
|
|
fm10k_watchdog_update_host_state(interface);
|
|
|
|
/* process downstream mailboxes */
|
|
fm10k_iov_mbx(interface);
|
|
}
|
|
|
|
/**
|
|
* fm10k_watchdog_host_is_ready - Update netdev status based on host ready
|
|
* @interface: board private structure
|
|
**/
|
|
static void fm10k_watchdog_host_is_ready(struct fm10k_intfc *interface)
|
|
{
|
|
struct net_device *netdev = interface->netdev;
|
|
|
|
/* only continue if link state is currently down */
|
|
if (netif_carrier_ok(netdev))
|
|
return;
|
|
|
|
netif_info(interface, drv, netdev, "NIC Link is up\n");
|
|
|
|
netif_carrier_on(netdev);
|
|
netif_tx_wake_all_queues(netdev);
|
|
}
|
|
|
|
/**
|
|
* fm10k_watchdog_host_not_ready - Update netdev status based on host not ready
|
|
* @interface: board private structure
|
|
**/
|
|
static void fm10k_watchdog_host_not_ready(struct fm10k_intfc *interface)
|
|
{
|
|
struct net_device *netdev = interface->netdev;
|
|
|
|
/* only continue if link state is currently up */
|
|
if (!netif_carrier_ok(netdev))
|
|
return;
|
|
|
|
netif_info(interface, drv, netdev, "NIC Link is down\n");
|
|
|
|
netif_carrier_off(netdev);
|
|
netif_tx_stop_all_queues(netdev);
|
|
}
|
|
|
|
/**
|
|
* fm10k_update_stats - Update the board statistics counters.
|
|
* @interface: board private structure
|
|
**/
|
|
void fm10k_update_stats(struct fm10k_intfc *interface)
|
|
{
|
|
struct net_device_stats *net_stats = &interface->netdev->stats;
|
|
struct fm10k_hw *hw = &interface->hw;
|
|
u64 hw_csum_tx_good = 0, hw_csum_rx_good = 0, rx_length_errors = 0;
|
|
u64 rx_switch_errors = 0, rx_drops = 0, rx_pp_errors = 0;
|
|
u64 rx_link_errors = 0;
|
|
u64 rx_errors = 0, rx_csum_errors = 0, tx_csum_errors = 0;
|
|
u64 restart_queue = 0, tx_busy = 0, alloc_failed = 0;
|
|
u64 rx_bytes_nic = 0, rx_pkts_nic = 0, rx_drops_nic = 0;
|
|
u64 tx_bytes_nic = 0, tx_pkts_nic = 0;
|
|
u64 bytes, pkts;
|
|
int i;
|
|
|
|
/* ensure only one thread updates stats at a time */
|
|
if (test_and_set_bit(__FM10K_UPDATING_STATS, interface->state))
|
|
return;
|
|
|
|
/* do not allow stats update via service task for next second */
|
|
interface->next_stats_update = jiffies + HZ;
|
|
|
|
/* gather some stats to the interface struct that are per queue */
|
|
for (bytes = 0, pkts = 0, i = 0; i < interface->num_tx_queues; i++) {
|
|
struct fm10k_ring *tx_ring = READ_ONCE(interface->tx_ring[i]);
|
|
|
|
if (!tx_ring)
|
|
continue;
|
|
|
|
restart_queue += tx_ring->tx_stats.restart_queue;
|
|
tx_busy += tx_ring->tx_stats.tx_busy;
|
|
tx_csum_errors += tx_ring->tx_stats.csum_err;
|
|
bytes += tx_ring->stats.bytes;
|
|
pkts += tx_ring->stats.packets;
|
|
hw_csum_tx_good += tx_ring->tx_stats.csum_good;
|
|
}
|
|
|
|
interface->restart_queue = restart_queue;
|
|
interface->tx_busy = tx_busy;
|
|
net_stats->tx_bytes = bytes;
|
|
net_stats->tx_packets = pkts;
|
|
interface->tx_csum_errors = tx_csum_errors;
|
|
interface->hw_csum_tx_good = hw_csum_tx_good;
|
|
|
|
/* gather some stats to the interface struct that are per queue */
|
|
for (bytes = 0, pkts = 0, i = 0; i < interface->num_rx_queues; i++) {
|
|
struct fm10k_ring *rx_ring = READ_ONCE(interface->rx_ring[i]);
|
|
|
|
if (!rx_ring)
|
|
continue;
|
|
|
|
bytes += rx_ring->stats.bytes;
|
|
pkts += rx_ring->stats.packets;
|
|
alloc_failed += rx_ring->rx_stats.alloc_failed;
|
|
rx_csum_errors += rx_ring->rx_stats.csum_err;
|
|
rx_errors += rx_ring->rx_stats.errors;
|
|
hw_csum_rx_good += rx_ring->rx_stats.csum_good;
|
|
rx_switch_errors += rx_ring->rx_stats.switch_errors;
|
|
rx_drops += rx_ring->rx_stats.drops;
|
|
rx_pp_errors += rx_ring->rx_stats.pp_errors;
|
|
rx_link_errors += rx_ring->rx_stats.link_errors;
|
|
rx_length_errors += rx_ring->rx_stats.length_errors;
|
|
}
|
|
|
|
net_stats->rx_bytes = bytes;
|
|
net_stats->rx_packets = pkts;
|
|
interface->alloc_failed = alloc_failed;
|
|
interface->rx_csum_errors = rx_csum_errors;
|
|
interface->hw_csum_rx_good = hw_csum_rx_good;
|
|
interface->rx_switch_errors = rx_switch_errors;
|
|
interface->rx_drops = rx_drops;
|
|
interface->rx_pp_errors = rx_pp_errors;
|
|
interface->rx_link_errors = rx_link_errors;
|
|
interface->rx_length_errors = rx_length_errors;
|
|
|
|
hw->mac.ops.update_hw_stats(hw, &interface->stats);
|
|
|
|
for (i = 0; i < hw->mac.max_queues; i++) {
|
|
struct fm10k_hw_stats_q *q = &interface->stats.q[i];
|
|
|
|
tx_bytes_nic += q->tx_bytes.count;
|
|
tx_pkts_nic += q->tx_packets.count;
|
|
rx_bytes_nic += q->rx_bytes.count;
|
|
rx_pkts_nic += q->rx_packets.count;
|
|
rx_drops_nic += q->rx_drops.count;
|
|
}
|
|
|
|
interface->tx_bytes_nic = tx_bytes_nic;
|
|
interface->tx_packets_nic = tx_pkts_nic;
|
|
interface->rx_bytes_nic = rx_bytes_nic;
|
|
interface->rx_packets_nic = rx_pkts_nic;
|
|
interface->rx_drops_nic = rx_drops_nic;
|
|
|
|
/* Fill out the OS statistics structure */
|
|
net_stats->rx_errors = rx_errors;
|
|
net_stats->rx_dropped = interface->stats.nodesc_drop.count;
|
|
|
|
clear_bit(__FM10K_UPDATING_STATS, interface->state);
|
|
}
|
|
|
|
/**
|
|
* fm10k_watchdog_flush_tx - flush queues on host not ready
|
|
* @interface - pointer to the device interface structure
|
|
**/
|
|
static void fm10k_watchdog_flush_tx(struct fm10k_intfc *interface)
|
|
{
|
|
int some_tx_pending = 0;
|
|
int i;
|
|
|
|
/* nothing to do if carrier is up */
|
|
if (netif_carrier_ok(interface->netdev))
|
|
return;
|
|
|
|
for (i = 0; i < interface->num_tx_queues; i++) {
|
|
struct fm10k_ring *tx_ring = interface->tx_ring[i];
|
|
|
|
if (tx_ring->next_to_use != tx_ring->next_to_clean) {
|
|
some_tx_pending = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* We've lost link, so the controller stops DMA, but we've got
|
|
* queued Tx work that's never going to get done, so reset
|
|
* controller to flush Tx.
|
|
*/
|
|
if (some_tx_pending)
|
|
set_bit(FM10K_FLAG_RESET_REQUESTED, interface->flags);
|
|
}
|
|
|
|
/**
|
|
* fm10k_watchdog_subtask - check and bring link up
|
|
* @interface - pointer to the device interface structure
|
|
**/
|
|
static void fm10k_watchdog_subtask(struct fm10k_intfc *interface)
|
|
{
|
|
/* if interface is down do nothing */
|
|
if (test_bit(__FM10K_DOWN, interface->state) ||
|
|
test_bit(__FM10K_RESETTING, interface->state))
|
|
return;
|
|
|
|
if (interface->host_ready)
|
|
fm10k_watchdog_host_is_ready(interface);
|
|
else
|
|
fm10k_watchdog_host_not_ready(interface);
|
|
|
|
/* update stats only once every second */
|
|
if (time_is_before_jiffies(interface->next_stats_update))
|
|
fm10k_update_stats(interface);
|
|
|
|
/* flush any uncompleted work */
|
|
fm10k_watchdog_flush_tx(interface);
|
|
}
|
|
|
|
/**
|
|
* fm10k_check_hang_subtask - check for hung queues and dropped interrupts
|
|
* @interface - pointer to the device interface structure
|
|
*
|
|
* This function serves two purposes. First it strobes the interrupt lines
|
|
* in order to make certain interrupts are occurring. Secondly it sets the
|
|
* bits needed to check for TX hangs. As a result we should immediately
|
|
* determine if a hang has occurred.
|
|
*/
|
|
static void fm10k_check_hang_subtask(struct fm10k_intfc *interface)
|
|
{
|
|
int i;
|
|
|
|
/* If we're down or resetting, just bail */
|
|
if (test_bit(__FM10K_DOWN, interface->state) ||
|
|
test_bit(__FM10K_RESETTING, interface->state))
|
|
return;
|
|
|
|
/* rate limit tx hang checks to only once every 2 seconds */
|
|
if (time_is_after_eq_jiffies(interface->next_tx_hang_check))
|
|
return;
|
|
interface->next_tx_hang_check = jiffies + (2 * HZ);
|
|
|
|
if (netif_carrier_ok(interface->netdev)) {
|
|
/* Force detection of hung controller */
|
|
for (i = 0; i < interface->num_tx_queues; i++)
|
|
set_check_for_tx_hang(interface->tx_ring[i]);
|
|
|
|
/* Rearm all in-use q_vectors for immediate firing */
|
|
for (i = 0; i < interface->num_q_vectors; i++) {
|
|
struct fm10k_q_vector *qv = interface->q_vector[i];
|
|
|
|
if (!qv->tx.count && !qv->rx.count)
|
|
continue;
|
|
writel(FM10K_ITR_ENABLE | FM10K_ITR_PENDING2, qv->itr);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* fm10k_service_task - manages and runs subtasks
|
|
* @work: pointer to work_struct containing our data
|
|
**/
|
|
static void fm10k_service_task(struct work_struct *work)
|
|
{
|
|
struct fm10k_intfc *interface;
|
|
|
|
interface = container_of(work, struct fm10k_intfc, service_task);
|
|
|
|
/* Check whether we're detached first */
|
|
fm10k_detach_subtask(interface);
|
|
|
|
/* tasks run even when interface is down */
|
|
fm10k_mbx_subtask(interface);
|
|
fm10k_reset_subtask(interface);
|
|
|
|
/* tasks only run when interface is up */
|
|
fm10k_watchdog_subtask(interface);
|
|
fm10k_check_hang_subtask(interface);
|
|
|
|
/* release lock on service events to allow scheduling next event */
|
|
fm10k_service_event_complete(interface);
|
|
}
|
|
|
|
/**
|
|
* fm10k_macvlan_task - send queued MAC/VLAN requests to switch manager
|
|
* @work: pointer to work_struct containing our data
|
|
*
|
|
* This work item handles sending MAC/VLAN updates to the switch manager. When
|
|
* the interface is up, it will attempt to queue mailbox messages to the
|
|
* switch manager requesting updates for MAC/VLAN pairs. If the Tx fifo of the
|
|
* mailbox is full, it will reschedule itself to try again in a short while.
|
|
* This ensures that the driver does not overload the switch mailbox with too
|
|
* many simultaneous requests, causing an unnecessary reset.
|
|
**/
|
|
static void fm10k_macvlan_task(struct work_struct *work)
|
|
{
|
|
struct fm10k_macvlan_request *item;
|
|
struct fm10k_intfc *interface;
|
|
struct delayed_work *dwork;
|
|
struct list_head *requests;
|
|
struct fm10k_hw *hw;
|
|
unsigned long flags;
|
|
|
|
dwork = to_delayed_work(work);
|
|
interface = container_of(dwork, struct fm10k_intfc, macvlan_task);
|
|
hw = &interface->hw;
|
|
requests = &interface->macvlan_requests;
|
|
|
|
do {
|
|
/* Pop the first item off the list */
|
|
spin_lock_irqsave(&interface->macvlan_lock, flags);
|
|
item = list_first_entry_or_null(requests,
|
|
struct fm10k_macvlan_request,
|
|
list);
|
|
if (item)
|
|
list_del_init(&item->list);
|
|
|
|
spin_unlock_irqrestore(&interface->macvlan_lock, flags);
|
|
|
|
/* We have no more items to process */
|
|
if (!item)
|
|
goto done;
|
|
|
|
fm10k_mbx_lock(interface);
|
|
|
|
/* Check that we have plenty of space to send the message. We
|
|
* want to ensure that the mailbox stays low enough to avoid a
|
|
* change in the host state, otherwise we may see spurious
|
|
* link up / link down notifications.
|
|
*/
|
|
if (!hw->mbx.ops.tx_ready(&hw->mbx, FM10K_VFMBX_MSG_MTU + 5)) {
|
|
hw->mbx.ops.process(hw, &hw->mbx);
|
|
set_bit(__FM10K_MACVLAN_REQUEST, interface->state);
|
|
fm10k_mbx_unlock(interface);
|
|
|
|
/* Put the request back on the list */
|
|
spin_lock_irqsave(&interface->macvlan_lock, flags);
|
|
list_add(&item->list, requests);
|
|
spin_unlock_irqrestore(&interface->macvlan_lock, flags);
|
|
break;
|
|
}
|
|
|
|
switch (item->type) {
|
|
case FM10K_MC_MAC_REQUEST:
|
|
hw->mac.ops.update_mc_addr(hw,
|
|
item->mac.glort,
|
|
item->mac.addr,
|
|
item->mac.vid,
|
|
item->set);
|
|
break;
|
|
case FM10K_UC_MAC_REQUEST:
|
|
hw->mac.ops.update_uc_addr(hw,
|
|
item->mac.glort,
|
|
item->mac.addr,
|
|
item->mac.vid,
|
|
item->set,
|
|
0);
|
|
break;
|
|
case FM10K_VLAN_REQUEST:
|
|
hw->mac.ops.update_vlan(hw,
|
|
item->vlan.vid,
|
|
item->vlan.vsi,
|
|
item->set);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
fm10k_mbx_unlock(interface);
|
|
|
|
/* Free the item now that we've sent the update */
|
|
kfree(item);
|
|
} while (true);
|
|
|
|
done:
|
|
WARN_ON(!test_bit(__FM10K_MACVLAN_SCHED, interface->state));
|
|
|
|
/* flush memory to make sure state is correct */
|
|
smp_mb__before_atomic();
|
|
clear_bit(__FM10K_MACVLAN_SCHED, interface->state);
|
|
|
|
/* If a MAC/VLAN request was scheduled since we started, we should
|
|
* re-schedule. However, there is no reason to re-schedule if there is
|
|
* no work to do.
|
|
*/
|
|
if (test_bit(__FM10K_MACVLAN_REQUEST, interface->state))
|
|
fm10k_macvlan_schedule(interface);
|
|
}
|
|
|
|
/**
|
|
* fm10k_configure_tx_ring - Configure Tx ring after Reset
|
|
* @interface: board private structure
|
|
* @ring: structure containing ring specific data
|
|
*
|
|
* Configure the Tx descriptor ring after a reset.
|
|
**/
|
|
static void fm10k_configure_tx_ring(struct fm10k_intfc *interface,
|
|
struct fm10k_ring *ring)
|
|
{
|
|
struct fm10k_hw *hw = &interface->hw;
|
|
u64 tdba = ring->dma;
|
|
u32 size = ring->count * sizeof(struct fm10k_tx_desc);
|
|
u32 txint = FM10K_INT_MAP_DISABLE;
|
|
u32 txdctl = BIT(FM10K_TXDCTL_MAX_TIME_SHIFT) | FM10K_TXDCTL_ENABLE;
|
|
u8 reg_idx = ring->reg_idx;
|
|
|
|
/* disable queue to avoid issues while updating state */
|
|
fm10k_write_reg(hw, FM10K_TXDCTL(reg_idx), 0);
|
|
fm10k_write_flush(hw);
|
|
|
|
/* possible poll here to verify ring resources have been cleaned */
|
|
|
|
/* set location and size for descriptor ring */
|
|
fm10k_write_reg(hw, FM10K_TDBAL(reg_idx), tdba & DMA_BIT_MASK(32));
|
|
fm10k_write_reg(hw, FM10K_TDBAH(reg_idx), tdba >> 32);
|
|
fm10k_write_reg(hw, FM10K_TDLEN(reg_idx), size);
|
|
|
|
/* reset head and tail pointers */
|
|
fm10k_write_reg(hw, FM10K_TDH(reg_idx), 0);
|
|
fm10k_write_reg(hw, FM10K_TDT(reg_idx), 0);
|
|
|
|
/* store tail pointer */
|
|
ring->tail = &interface->uc_addr[FM10K_TDT(reg_idx)];
|
|
|
|
/* reset ntu and ntc to place SW in sync with hardware */
|
|
ring->next_to_clean = 0;
|
|
ring->next_to_use = 0;
|
|
|
|
/* Map interrupt */
|
|
if (ring->q_vector) {
|
|
txint = ring->q_vector->v_idx + NON_Q_VECTORS(hw);
|
|
txint |= FM10K_INT_MAP_TIMER0;
|
|
}
|
|
|
|
fm10k_write_reg(hw, FM10K_TXINT(reg_idx), txint);
|
|
|
|
/* enable use of FTAG bit in Tx descriptor, register is RO for VF */
|
|
fm10k_write_reg(hw, FM10K_PFVTCTL(reg_idx),
|
|
FM10K_PFVTCTL_FTAG_DESC_ENABLE);
|
|
|
|
/* Initialize XPS */
|
|
if (!test_and_set_bit(__FM10K_TX_XPS_INIT_DONE, ring->state) &&
|
|
ring->q_vector)
|
|
netif_set_xps_queue(ring->netdev,
|
|
&ring->q_vector->affinity_mask,
|
|
ring->queue_index);
|
|
|
|
/* enable queue */
|
|
fm10k_write_reg(hw, FM10K_TXDCTL(reg_idx), txdctl);
|
|
}
|
|
|
|
/**
|
|
* fm10k_enable_tx_ring - Verify Tx ring is enabled after configuration
|
|
* @interface: board private structure
|
|
* @ring: structure containing ring specific data
|
|
*
|
|
* Verify the Tx descriptor ring is ready for transmit.
|
|
**/
|
|
static void fm10k_enable_tx_ring(struct fm10k_intfc *interface,
|
|
struct fm10k_ring *ring)
|
|
{
|
|
struct fm10k_hw *hw = &interface->hw;
|
|
int wait_loop = 10;
|
|
u32 txdctl;
|
|
u8 reg_idx = ring->reg_idx;
|
|
|
|
/* if we are already enabled just exit */
|
|
if (fm10k_read_reg(hw, FM10K_TXDCTL(reg_idx)) & FM10K_TXDCTL_ENABLE)
|
|
return;
|
|
|
|
/* poll to verify queue is enabled */
|
|
do {
|
|
usleep_range(1000, 2000);
|
|
txdctl = fm10k_read_reg(hw, FM10K_TXDCTL(reg_idx));
|
|
} while (!(txdctl & FM10K_TXDCTL_ENABLE) && --wait_loop);
|
|
if (!wait_loop)
|
|
netif_err(interface, drv, interface->netdev,
|
|
"Could not enable Tx Queue %d\n", reg_idx);
|
|
}
|
|
|
|
/**
|
|
* fm10k_configure_tx - Configure Transmit Unit after Reset
|
|
* @interface: board private structure
|
|
*
|
|
* Configure the Tx unit of the MAC after a reset.
|
|
**/
|
|
static void fm10k_configure_tx(struct fm10k_intfc *interface)
|
|
{
|
|
int i;
|
|
|
|
/* Setup the HW Tx Head and Tail descriptor pointers */
|
|
for (i = 0; i < interface->num_tx_queues; i++)
|
|
fm10k_configure_tx_ring(interface, interface->tx_ring[i]);
|
|
|
|
/* poll here to verify that Tx rings are now enabled */
|
|
for (i = 0; i < interface->num_tx_queues; i++)
|
|
fm10k_enable_tx_ring(interface, interface->tx_ring[i]);
|
|
}
|
|
|
|
/**
|
|
* fm10k_configure_rx_ring - Configure Rx ring after Reset
|
|
* @interface: board private structure
|
|
* @ring: structure containing ring specific data
|
|
*
|
|
* Configure the Rx descriptor ring after a reset.
|
|
**/
|
|
static void fm10k_configure_rx_ring(struct fm10k_intfc *interface,
|
|
struct fm10k_ring *ring)
|
|
{
|
|
u64 rdba = ring->dma;
|
|
struct fm10k_hw *hw = &interface->hw;
|
|
u32 size = ring->count * sizeof(union fm10k_rx_desc);
|
|
u32 rxqctl, rxdctl = FM10K_RXDCTL_WRITE_BACK_MIN_DELAY;
|
|
u32 srrctl = FM10K_SRRCTL_BUFFER_CHAINING_EN;
|
|
u32 rxint = FM10K_INT_MAP_DISABLE;
|
|
u8 rx_pause = interface->rx_pause;
|
|
u8 reg_idx = ring->reg_idx;
|
|
|
|
/* disable queue to avoid issues while updating state */
|
|
rxqctl = fm10k_read_reg(hw, FM10K_RXQCTL(reg_idx));
|
|
rxqctl &= ~FM10K_RXQCTL_ENABLE;
|
|
fm10k_write_reg(hw, FM10K_RXQCTL(reg_idx), rxqctl);
|
|
fm10k_write_flush(hw);
|
|
|
|
/* possible poll here to verify ring resources have been cleaned */
|
|
|
|
/* set location and size for descriptor ring */
|
|
fm10k_write_reg(hw, FM10K_RDBAL(reg_idx), rdba & DMA_BIT_MASK(32));
|
|
fm10k_write_reg(hw, FM10K_RDBAH(reg_idx), rdba >> 32);
|
|
fm10k_write_reg(hw, FM10K_RDLEN(reg_idx), size);
|
|
|
|
/* reset head and tail pointers */
|
|
fm10k_write_reg(hw, FM10K_RDH(reg_idx), 0);
|
|
fm10k_write_reg(hw, FM10K_RDT(reg_idx), 0);
|
|
|
|
/* store tail pointer */
|
|
ring->tail = &interface->uc_addr[FM10K_RDT(reg_idx)];
|
|
|
|
/* reset ntu and ntc to place SW in sync with hardware */
|
|
ring->next_to_clean = 0;
|
|
ring->next_to_use = 0;
|
|
ring->next_to_alloc = 0;
|
|
|
|
/* Configure the Rx buffer size for one buff without split */
|
|
srrctl |= FM10K_RX_BUFSZ >> FM10K_SRRCTL_BSIZEPKT_SHIFT;
|
|
|
|
/* Configure the Rx ring to suppress loopback packets */
|
|
srrctl |= FM10K_SRRCTL_LOOPBACK_SUPPRESS;
|
|
fm10k_write_reg(hw, FM10K_SRRCTL(reg_idx), srrctl);
|
|
|
|
/* Enable drop on empty */
|
|
#ifdef CONFIG_DCB
|
|
if (interface->pfc_en)
|
|
rx_pause = interface->pfc_en;
|
|
#endif
|
|
if (!(rx_pause & BIT(ring->qos_pc)))
|
|
rxdctl |= FM10K_RXDCTL_DROP_ON_EMPTY;
|
|
|
|
fm10k_write_reg(hw, FM10K_RXDCTL(reg_idx), rxdctl);
|
|
|
|
/* assign default VLAN to queue */
|
|
ring->vid = hw->mac.default_vid;
|
|
|
|
/* if we have an active VLAN, disable default VLAN ID */
|
|
if (test_bit(hw->mac.default_vid, interface->active_vlans))
|
|
ring->vid |= FM10K_VLAN_CLEAR;
|
|
|
|
/* Map interrupt */
|
|
if (ring->q_vector) {
|
|
rxint = ring->q_vector->v_idx + NON_Q_VECTORS(hw);
|
|
rxint |= FM10K_INT_MAP_TIMER1;
|
|
}
|
|
|
|
fm10k_write_reg(hw, FM10K_RXINT(reg_idx), rxint);
|
|
|
|
/* enable queue */
|
|
rxqctl = fm10k_read_reg(hw, FM10K_RXQCTL(reg_idx));
|
|
rxqctl |= FM10K_RXQCTL_ENABLE;
|
|
fm10k_write_reg(hw, FM10K_RXQCTL(reg_idx), rxqctl);
|
|
|
|
/* place buffers on ring for receive data */
|
|
fm10k_alloc_rx_buffers(ring, fm10k_desc_unused(ring));
|
|
}
|
|
|
|
/**
|
|
* fm10k_update_rx_drop_en - Configures the drop enable bits for Rx rings
|
|
* @interface: board private structure
|
|
*
|
|
* Configure the drop enable bits for the Rx rings.
|
|
**/
|
|
void fm10k_update_rx_drop_en(struct fm10k_intfc *interface)
|
|
{
|
|
struct fm10k_hw *hw = &interface->hw;
|
|
u8 rx_pause = interface->rx_pause;
|
|
int i;
|
|
|
|
#ifdef CONFIG_DCB
|
|
if (interface->pfc_en)
|
|
rx_pause = interface->pfc_en;
|
|
|
|
#endif
|
|
for (i = 0; i < interface->num_rx_queues; i++) {
|
|
struct fm10k_ring *ring = interface->rx_ring[i];
|
|
u32 rxdctl = FM10K_RXDCTL_WRITE_BACK_MIN_DELAY;
|
|
u8 reg_idx = ring->reg_idx;
|
|
|
|
if (!(rx_pause & BIT(ring->qos_pc)))
|
|
rxdctl |= FM10K_RXDCTL_DROP_ON_EMPTY;
|
|
|
|
fm10k_write_reg(hw, FM10K_RXDCTL(reg_idx), rxdctl);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* fm10k_configure_dglort - Configure Receive DGLORT after reset
|
|
* @interface: board private structure
|
|
*
|
|
* Configure the DGLORT description and RSS tables.
|
|
**/
|
|
static void fm10k_configure_dglort(struct fm10k_intfc *interface)
|
|
{
|
|
struct fm10k_dglort_cfg dglort = { 0 };
|
|
struct fm10k_hw *hw = &interface->hw;
|
|
int i;
|
|
u32 mrqc;
|
|
|
|
/* Fill out hash function seeds */
|
|
for (i = 0; i < FM10K_RSSRK_SIZE; i++)
|
|
fm10k_write_reg(hw, FM10K_RSSRK(0, i), interface->rssrk[i]);
|
|
|
|
/* Write RETA table to hardware */
|
|
for (i = 0; i < FM10K_RETA_SIZE; i++)
|
|
fm10k_write_reg(hw, FM10K_RETA(0, i), interface->reta[i]);
|
|
|
|
/* Generate RSS hash based on packet types, TCP/UDP
|
|
* port numbers and/or IPv4/v6 src and dst addresses
|
|
*/
|
|
mrqc = FM10K_MRQC_IPV4 |
|
|
FM10K_MRQC_TCP_IPV4 |
|
|
FM10K_MRQC_IPV6 |
|
|
FM10K_MRQC_TCP_IPV6;
|
|
|
|
if (test_bit(FM10K_FLAG_RSS_FIELD_IPV4_UDP, interface->flags))
|
|
mrqc |= FM10K_MRQC_UDP_IPV4;
|
|
if (test_bit(FM10K_FLAG_RSS_FIELD_IPV6_UDP, interface->flags))
|
|
mrqc |= FM10K_MRQC_UDP_IPV6;
|
|
|
|
fm10k_write_reg(hw, FM10K_MRQC(0), mrqc);
|
|
|
|
/* configure default DGLORT mapping for RSS/DCB */
|
|
dglort.inner_rss = 1;
|
|
dglort.rss_l = fls(interface->ring_feature[RING_F_RSS].mask);
|
|
dglort.pc_l = fls(interface->ring_feature[RING_F_QOS].mask);
|
|
hw->mac.ops.configure_dglort_map(hw, &dglort);
|
|
|
|
/* assign GLORT per queue for queue mapped testing */
|
|
if (interface->glort_count > 64) {
|
|
memset(&dglort, 0, sizeof(dglort));
|
|
dglort.inner_rss = 1;
|
|
dglort.glort = interface->glort + 64;
|
|
dglort.idx = fm10k_dglort_pf_queue;
|
|
dglort.queue_l = fls(interface->num_rx_queues - 1);
|
|
hw->mac.ops.configure_dglort_map(hw, &dglort);
|
|
}
|
|
|
|
/* assign glort value for RSS/DCB specific to this interface */
|
|
memset(&dglort, 0, sizeof(dglort));
|
|
dglort.inner_rss = 1;
|
|
dglort.glort = interface->glort;
|
|
dglort.rss_l = fls(interface->ring_feature[RING_F_RSS].mask);
|
|
dglort.pc_l = fls(interface->ring_feature[RING_F_QOS].mask);
|
|
/* configure DGLORT mapping for RSS/DCB */
|
|
dglort.idx = fm10k_dglort_pf_rss;
|
|
if (interface->l2_accel)
|
|
dglort.shared_l = fls(interface->l2_accel->size);
|
|
hw->mac.ops.configure_dglort_map(hw, &dglort);
|
|
}
|
|
|
|
/**
|
|
* fm10k_configure_rx - Configure Receive Unit after Reset
|
|
* @interface: board private structure
|
|
*
|
|
* Configure the Rx unit of the MAC after a reset.
|
|
**/
|
|
static void fm10k_configure_rx(struct fm10k_intfc *interface)
|
|
{
|
|
int i;
|
|
|
|
/* Configure SWPRI to PC map */
|
|
fm10k_configure_swpri_map(interface);
|
|
|
|
/* Configure RSS and DGLORT map */
|
|
fm10k_configure_dglort(interface);
|
|
|
|
/* Setup the HW Rx Head and Tail descriptor pointers */
|
|
for (i = 0; i < interface->num_rx_queues; i++)
|
|
fm10k_configure_rx_ring(interface, interface->rx_ring[i]);
|
|
|
|
/* possible poll here to verify that Rx rings are now enabled */
|
|
}
|
|
|
|
static void fm10k_napi_enable_all(struct fm10k_intfc *interface)
|
|
{
|
|
struct fm10k_q_vector *q_vector;
|
|
int q_idx;
|
|
|
|
for (q_idx = 0; q_idx < interface->num_q_vectors; q_idx++) {
|
|
q_vector = interface->q_vector[q_idx];
|
|
napi_enable(&q_vector->napi);
|
|
}
|
|
}
|
|
|
|
static irqreturn_t fm10k_msix_clean_rings(int __always_unused irq, void *data)
|
|
{
|
|
struct fm10k_q_vector *q_vector = data;
|
|
|
|
if (q_vector->rx.count || q_vector->tx.count)
|
|
napi_schedule_irqoff(&q_vector->napi);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static irqreturn_t fm10k_msix_mbx_vf(int __always_unused irq, void *data)
|
|
{
|
|
struct fm10k_intfc *interface = data;
|
|
struct fm10k_hw *hw = &interface->hw;
|
|
struct fm10k_mbx_info *mbx = &hw->mbx;
|
|
|
|
/* re-enable mailbox interrupt and indicate 20us delay */
|
|
fm10k_write_reg(hw, FM10K_VFITR(FM10K_MBX_VECTOR),
|
|
(FM10K_MBX_INT_DELAY >> hw->mac.itr_scale) |
|
|
FM10K_ITR_ENABLE);
|
|
|
|
/* service upstream mailbox */
|
|
if (fm10k_mbx_trylock(interface)) {
|
|
mbx->ops.process(hw, mbx);
|
|
fm10k_mbx_unlock(interface);
|
|
}
|
|
|
|
hw->mac.get_host_state = true;
|
|
fm10k_service_event_schedule(interface);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
|
/**
|
|
* fm10k_netpoll - A Polling 'interrupt' handler
|
|
* @netdev: network interface device structure
|
|
*
|
|
* This is used by netconsole to send skbs without having to re-enable
|
|
* interrupts. It's not called while the normal interrupt routine is executing.
|
|
**/
|
|
void fm10k_netpoll(struct net_device *netdev)
|
|
{
|
|
struct fm10k_intfc *interface = netdev_priv(netdev);
|
|
int i;
|
|
|
|
/* if interface is down do nothing */
|
|
if (test_bit(__FM10K_DOWN, interface->state))
|
|
return;
|
|
|
|
for (i = 0; i < interface->num_q_vectors; i++)
|
|
fm10k_msix_clean_rings(0, interface->q_vector[i]);
|
|
}
|
|
|
|
#endif
|
|
#define FM10K_ERR_MSG(type) case (type): error = #type; break
|
|
static void fm10k_handle_fault(struct fm10k_intfc *interface, int type,
|
|
struct fm10k_fault *fault)
|
|
{
|
|
struct pci_dev *pdev = interface->pdev;
|
|
struct fm10k_hw *hw = &interface->hw;
|
|
struct fm10k_iov_data *iov_data = interface->iov_data;
|
|
char *error;
|
|
|
|
switch (type) {
|
|
case FM10K_PCA_FAULT:
|
|
switch (fault->type) {
|
|
default:
|
|
error = "Unknown PCA error";
|
|
break;
|
|
FM10K_ERR_MSG(PCA_NO_FAULT);
|
|
FM10K_ERR_MSG(PCA_UNMAPPED_ADDR);
|
|
FM10K_ERR_MSG(PCA_BAD_QACCESS_PF);
|
|
FM10K_ERR_MSG(PCA_BAD_QACCESS_VF);
|
|
FM10K_ERR_MSG(PCA_MALICIOUS_REQ);
|
|
FM10K_ERR_MSG(PCA_POISONED_TLP);
|
|
FM10K_ERR_MSG(PCA_TLP_ABORT);
|
|
}
|
|
break;
|
|
case FM10K_THI_FAULT:
|
|
switch (fault->type) {
|
|
default:
|
|
error = "Unknown THI error";
|
|
break;
|
|
FM10K_ERR_MSG(THI_NO_FAULT);
|
|
FM10K_ERR_MSG(THI_MAL_DIS_Q_FAULT);
|
|
}
|
|
break;
|
|
case FM10K_FUM_FAULT:
|
|
switch (fault->type) {
|
|
default:
|
|
error = "Unknown FUM error";
|
|
break;
|
|
FM10K_ERR_MSG(FUM_NO_FAULT);
|
|
FM10K_ERR_MSG(FUM_UNMAPPED_ADDR);
|
|
FM10K_ERR_MSG(FUM_BAD_VF_QACCESS);
|
|
FM10K_ERR_MSG(FUM_ADD_DECODE_ERR);
|
|
FM10K_ERR_MSG(FUM_RO_ERROR);
|
|
FM10K_ERR_MSG(FUM_QPRC_CRC_ERROR);
|
|
FM10K_ERR_MSG(FUM_CSR_TIMEOUT);
|
|
FM10K_ERR_MSG(FUM_INVALID_TYPE);
|
|
FM10K_ERR_MSG(FUM_INVALID_LENGTH);
|
|
FM10K_ERR_MSG(FUM_INVALID_BE);
|
|
FM10K_ERR_MSG(FUM_INVALID_ALIGN);
|
|
}
|
|
break;
|
|
default:
|
|
error = "Undocumented fault";
|
|
break;
|
|
}
|
|
|
|
dev_warn(&pdev->dev,
|
|
"%s Address: 0x%llx SpecInfo: 0x%x Func: %02x.%0x\n",
|
|
error, fault->address, fault->specinfo,
|
|
PCI_SLOT(fault->func), PCI_FUNC(fault->func));
|
|
|
|
/* For VF faults, clear out the respective LPORT, reset the queue
|
|
* resources, and then reconnect to the mailbox. This allows the
|
|
* VF in question to resume behavior. For transient faults that are
|
|
* the result of non-malicious behavior this will log the fault and
|
|
* allow the VF to resume functionality. Obviously for malicious VFs
|
|
* they will be able to attempt malicious behavior again. In this
|
|
* case, the system administrator will need to step in and manually
|
|
* remove or disable the VF in question.
|
|
*/
|
|
if (fault->func && iov_data) {
|
|
int vf = fault->func - 1;
|
|
struct fm10k_vf_info *vf_info = &iov_data->vf_info[vf];
|
|
|
|
hw->iov.ops.reset_lport(hw, vf_info);
|
|
hw->iov.ops.reset_resources(hw, vf_info);
|
|
|
|
/* reset_lport disables the VF, so re-enable it */
|
|
hw->iov.ops.set_lport(hw, vf_info, vf,
|
|
FM10K_VF_FLAG_MULTI_CAPABLE);
|
|
|
|
/* reset_resources will disconnect from the mbx */
|
|
vf_info->mbx.ops.connect(hw, &vf_info->mbx);
|
|
}
|
|
}
|
|
|
|
static void fm10k_report_fault(struct fm10k_intfc *interface, u32 eicr)
|
|
{
|
|
struct fm10k_hw *hw = &interface->hw;
|
|
struct fm10k_fault fault = { 0 };
|
|
int type, err;
|
|
|
|
for (eicr &= FM10K_EICR_FAULT_MASK, type = FM10K_PCA_FAULT;
|
|
eicr;
|
|
eicr >>= 1, type += FM10K_FAULT_SIZE) {
|
|
/* only check if there is an error reported */
|
|
if (!(eicr & 0x1))
|
|
continue;
|
|
|
|
/* retrieve fault info */
|
|
err = hw->mac.ops.get_fault(hw, type, &fault);
|
|
if (err) {
|
|
dev_err(&interface->pdev->dev,
|
|
"error reading fault\n");
|
|
continue;
|
|
}
|
|
|
|
fm10k_handle_fault(interface, type, &fault);
|
|
}
|
|
}
|
|
|
|
static void fm10k_reset_drop_on_empty(struct fm10k_intfc *interface, u32 eicr)
|
|
{
|
|
struct fm10k_hw *hw = &interface->hw;
|
|
const u32 rxdctl = FM10K_RXDCTL_WRITE_BACK_MIN_DELAY;
|
|
u32 maxholdq;
|
|
int q;
|
|
|
|
if (!(eicr & FM10K_EICR_MAXHOLDTIME))
|
|
return;
|
|
|
|
maxholdq = fm10k_read_reg(hw, FM10K_MAXHOLDQ(7));
|
|
if (maxholdq)
|
|
fm10k_write_reg(hw, FM10K_MAXHOLDQ(7), maxholdq);
|
|
for (q = 255;;) {
|
|
if (maxholdq & BIT(31)) {
|
|
if (q < FM10K_MAX_QUEUES_PF) {
|
|
interface->rx_overrun_pf++;
|
|
fm10k_write_reg(hw, FM10K_RXDCTL(q), rxdctl);
|
|
} else {
|
|
interface->rx_overrun_vf++;
|
|
}
|
|
}
|
|
|
|
maxholdq *= 2;
|
|
if (!maxholdq)
|
|
q &= ~(32 - 1);
|
|
|
|
if (!q)
|
|
break;
|
|
|
|
if (q-- % 32)
|
|
continue;
|
|
|
|
maxholdq = fm10k_read_reg(hw, FM10K_MAXHOLDQ(q / 32));
|
|
if (maxholdq)
|
|
fm10k_write_reg(hw, FM10K_MAXHOLDQ(q / 32), maxholdq);
|
|
}
|
|
}
|
|
|
|
static irqreturn_t fm10k_msix_mbx_pf(int __always_unused irq, void *data)
|
|
{
|
|
struct fm10k_intfc *interface = data;
|
|
struct fm10k_hw *hw = &interface->hw;
|
|
struct fm10k_mbx_info *mbx = &hw->mbx;
|
|
u32 eicr;
|
|
s32 err = 0;
|
|
|
|
/* unmask any set bits related to this interrupt */
|
|
eicr = fm10k_read_reg(hw, FM10K_EICR);
|
|
fm10k_write_reg(hw, FM10K_EICR, eicr & (FM10K_EICR_MAILBOX |
|
|
FM10K_EICR_SWITCHREADY |
|
|
FM10K_EICR_SWITCHNOTREADY));
|
|
|
|
/* report any faults found to the message log */
|
|
fm10k_report_fault(interface, eicr);
|
|
|
|
/* reset any queues disabled due to receiver overrun */
|
|
fm10k_reset_drop_on_empty(interface, eicr);
|
|
|
|
/* service mailboxes */
|
|
if (fm10k_mbx_trylock(interface)) {
|
|
err = mbx->ops.process(hw, mbx);
|
|
/* handle VFLRE events */
|
|
fm10k_iov_event(interface);
|
|
fm10k_mbx_unlock(interface);
|
|
}
|
|
|
|
if (err == FM10K_ERR_RESET_REQUESTED)
|
|
set_bit(FM10K_FLAG_RESET_REQUESTED, interface->flags);
|
|
|
|
/* if switch toggled state we should reset GLORTs */
|
|
if (eicr & FM10K_EICR_SWITCHNOTREADY) {
|
|
/* force link down for at least 4 seconds */
|
|
interface->link_down_event = jiffies + (4 * HZ);
|
|
set_bit(__FM10K_LINK_DOWN, interface->state);
|
|
|
|
/* reset dglort_map back to no config */
|
|
hw->mac.dglort_map = FM10K_DGLORTMAP_NONE;
|
|
}
|
|
|
|
/* we should validate host state after interrupt event */
|
|
hw->mac.get_host_state = true;
|
|
|
|
/* validate host state, and handle VF mailboxes in the service task */
|
|
fm10k_service_event_schedule(interface);
|
|
|
|
/* re-enable mailbox interrupt and indicate 20us delay */
|
|
fm10k_write_reg(hw, FM10K_ITR(FM10K_MBX_VECTOR),
|
|
(FM10K_MBX_INT_DELAY >> hw->mac.itr_scale) |
|
|
FM10K_ITR_ENABLE);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
void fm10k_mbx_free_irq(struct fm10k_intfc *interface)
|
|
{
|
|
struct fm10k_hw *hw = &interface->hw;
|
|
struct msix_entry *entry;
|
|
int itr_reg;
|
|
|
|
/* no mailbox IRQ to free if MSI-X is not enabled */
|
|
if (!interface->msix_entries)
|
|
return;
|
|
|
|
entry = &interface->msix_entries[FM10K_MBX_VECTOR];
|
|
|
|
/* disconnect the mailbox */
|
|
hw->mbx.ops.disconnect(hw, &hw->mbx);
|
|
|
|
/* disable Mailbox cause */
|
|
if (hw->mac.type == fm10k_mac_pf) {
|
|
fm10k_write_reg(hw, FM10K_EIMR,
|
|
FM10K_EIMR_DISABLE(PCA_FAULT) |
|
|
FM10K_EIMR_DISABLE(FUM_FAULT) |
|
|
FM10K_EIMR_DISABLE(MAILBOX) |
|
|
FM10K_EIMR_DISABLE(SWITCHREADY) |
|
|
FM10K_EIMR_DISABLE(SWITCHNOTREADY) |
|
|
FM10K_EIMR_DISABLE(SRAMERROR) |
|
|
FM10K_EIMR_DISABLE(VFLR) |
|
|
FM10K_EIMR_DISABLE(MAXHOLDTIME));
|
|
itr_reg = FM10K_ITR(FM10K_MBX_VECTOR);
|
|
} else {
|
|
itr_reg = FM10K_VFITR(FM10K_MBX_VECTOR);
|
|
}
|
|
|
|
fm10k_write_reg(hw, itr_reg, FM10K_ITR_MASK_SET);
|
|
|
|
free_irq(entry->vector, interface);
|
|
}
|
|
|
|
static s32 fm10k_mbx_mac_addr(struct fm10k_hw *hw, u32 **results,
|
|
struct fm10k_mbx_info *mbx)
|
|
{
|
|
bool vlan_override = hw->mac.vlan_override;
|
|
u16 default_vid = hw->mac.default_vid;
|
|
struct fm10k_intfc *interface;
|
|
s32 err;
|
|
|
|
err = fm10k_msg_mac_vlan_vf(hw, results, mbx);
|
|
if (err)
|
|
return err;
|
|
|
|
interface = container_of(hw, struct fm10k_intfc, hw);
|
|
|
|
/* MAC was changed so we need reset */
|
|
if (is_valid_ether_addr(hw->mac.perm_addr) &&
|
|
!ether_addr_equal(hw->mac.perm_addr, hw->mac.addr))
|
|
set_bit(FM10K_FLAG_RESET_REQUESTED, interface->flags);
|
|
|
|
/* VLAN override was changed, or default VLAN changed */
|
|
if ((vlan_override != hw->mac.vlan_override) ||
|
|
(default_vid != hw->mac.default_vid))
|
|
set_bit(FM10K_FLAG_RESET_REQUESTED, interface->flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* generic error handler for mailbox issues */
|
|
static s32 fm10k_mbx_error(struct fm10k_hw *hw, u32 **results,
|
|
struct fm10k_mbx_info __always_unused *mbx)
|
|
{
|
|
struct fm10k_intfc *interface;
|
|
struct pci_dev *pdev;
|
|
|
|
interface = container_of(hw, struct fm10k_intfc, hw);
|
|
pdev = interface->pdev;
|
|
|
|
dev_err(&pdev->dev, "Unknown message ID %u\n",
|
|
**results & FM10K_TLV_ID_MASK);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct fm10k_msg_data vf_mbx_data[] = {
|
|
FM10K_TLV_MSG_TEST_HANDLER(fm10k_tlv_msg_test),
|
|
FM10K_VF_MSG_MAC_VLAN_HANDLER(fm10k_mbx_mac_addr),
|
|
FM10K_VF_MSG_LPORT_STATE_HANDLER(fm10k_msg_lport_state_vf),
|
|
FM10K_TLV_MSG_ERROR_HANDLER(fm10k_mbx_error),
|
|
};
|
|
|
|
static int fm10k_mbx_request_irq_vf(struct fm10k_intfc *interface)
|
|
{
|
|
struct msix_entry *entry = &interface->msix_entries[FM10K_MBX_VECTOR];
|
|
struct net_device *dev = interface->netdev;
|
|
struct fm10k_hw *hw = &interface->hw;
|
|
int err;
|
|
|
|
/* Use timer0 for interrupt moderation on the mailbox */
|
|
u32 itr = entry->entry | FM10K_INT_MAP_TIMER0;
|
|
|
|
/* register mailbox handlers */
|
|
err = hw->mbx.ops.register_handlers(&hw->mbx, vf_mbx_data);
|
|
if (err)
|
|
return err;
|
|
|
|
/* request the IRQ */
|
|
err = request_irq(entry->vector, fm10k_msix_mbx_vf, 0,
|
|
dev->name, interface);
|
|
if (err) {
|
|
netif_err(interface, probe, dev,
|
|
"request_irq for msix_mbx failed: %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
/* map all of the interrupt sources */
|
|
fm10k_write_reg(hw, FM10K_VFINT_MAP, itr);
|
|
|
|
/* enable interrupt */
|
|
fm10k_write_reg(hw, FM10K_VFITR(entry->entry), FM10K_ITR_ENABLE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static s32 fm10k_lport_map(struct fm10k_hw *hw, u32 **results,
|
|
struct fm10k_mbx_info *mbx)
|
|
{
|
|
struct fm10k_intfc *interface;
|
|
u32 dglort_map = hw->mac.dglort_map;
|
|
s32 err;
|
|
|
|
interface = container_of(hw, struct fm10k_intfc, hw);
|
|
|
|
err = fm10k_msg_err_pf(hw, results, mbx);
|
|
if (!err && hw->swapi.status) {
|
|
/* force link down for a reasonable delay */
|
|
interface->link_down_event = jiffies + (2 * HZ);
|
|
set_bit(__FM10K_LINK_DOWN, interface->state);
|
|
|
|
/* reset dglort_map back to no config */
|
|
hw->mac.dglort_map = FM10K_DGLORTMAP_NONE;
|
|
|
|
fm10k_service_event_schedule(interface);
|
|
|
|
/* prevent overloading kernel message buffer */
|
|
if (interface->lport_map_failed)
|
|
return 0;
|
|
|
|
interface->lport_map_failed = true;
|
|
|
|
if (hw->swapi.status == FM10K_MSG_ERR_PEP_NOT_SCHEDULED)
|
|
dev_warn(&interface->pdev->dev,
|
|
"cannot obtain link because the host interface is configured for a PCIe host interface bandwidth of zero\n");
|
|
dev_warn(&interface->pdev->dev,
|
|
"request logical port map failed: %d\n",
|
|
hw->swapi.status);
|
|
|
|
return 0;
|
|
}
|
|
|
|
err = fm10k_msg_lport_map_pf(hw, results, mbx);
|
|
if (err)
|
|
return err;
|
|
|
|
interface->lport_map_failed = false;
|
|
|
|
/* we need to reset if port count was just updated */
|
|
if (dglort_map != hw->mac.dglort_map)
|
|
set_bit(FM10K_FLAG_RESET_REQUESTED, interface->flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static s32 fm10k_update_pvid(struct fm10k_hw *hw, u32 **results,
|
|
struct fm10k_mbx_info __always_unused *mbx)
|
|
{
|
|
struct fm10k_intfc *interface;
|
|
u16 glort, pvid;
|
|
u32 pvid_update;
|
|
s32 err;
|
|
|
|
err = fm10k_tlv_attr_get_u32(results[FM10K_PF_ATTR_ID_UPDATE_PVID],
|
|
&pvid_update);
|
|
if (err)
|
|
return err;
|
|
|
|
/* extract values from the pvid update */
|
|
glort = FM10K_MSG_HDR_FIELD_GET(pvid_update, UPDATE_PVID_GLORT);
|
|
pvid = FM10K_MSG_HDR_FIELD_GET(pvid_update, UPDATE_PVID_PVID);
|
|
|
|
/* if glort is not valid return error */
|
|
if (!fm10k_glort_valid_pf(hw, glort))
|
|
return FM10K_ERR_PARAM;
|
|
|
|
/* verify VLAN ID is valid */
|
|
if (pvid >= FM10K_VLAN_TABLE_VID_MAX)
|
|
return FM10K_ERR_PARAM;
|
|
|
|
interface = container_of(hw, struct fm10k_intfc, hw);
|
|
|
|
/* check to see if this belongs to one of the VFs */
|
|
err = fm10k_iov_update_pvid(interface, glort, pvid);
|
|
if (!err)
|
|
return 0;
|
|
|
|
/* we need to reset if default VLAN was just updated */
|
|
if (pvid != hw->mac.default_vid)
|
|
set_bit(FM10K_FLAG_RESET_REQUESTED, interface->flags);
|
|
|
|
hw->mac.default_vid = pvid;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct fm10k_msg_data pf_mbx_data[] = {
|
|
FM10K_PF_MSG_ERR_HANDLER(XCAST_MODES, fm10k_msg_err_pf),
|
|
FM10K_PF_MSG_ERR_HANDLER(UPDATE_MAC_FWD_RULE, fm10k_msg_err_pf),
|
|
FM10K_PF_MSG_LPORT_MAP_HANDLER(fm10k_lport_map),
|
|
FM10K_PF_MSG_ERR_HANDLER(LPORT_CREATE, fm10k_msg_err_pf),
|
|
FM10K_PF_MSG_ERR_HANDLER(LPORT_DELETE, fm10k_msg_err_pf),
|
|
FM10K_PF_MSG_UPDATE_PVID_HANDLER(fm10k_update_pvid),
|
|
FM10K_TLV_MSG_ERROR_HANDLER(fm10k_mbx_error),
|
|
};
|
|
|
|
static int fm10k_mbx_request_irq_pf(struct fm10k_intfc *interface)
|
|
{
|
|
struct msix_entry *entry = &interface->msix_entries[FM10K_MBX_VECTOR];
|
|
struct net_device *dev = interface->netdev;
|
|
struct fm10k_hw *hw = &interface->hw;
|
|
int err;
|
|
|
|
/* Use timer0 for interrupt moderation on the mailbox */
|
|
u32 mbx_itr = entry->entry | FM10K_INT_MAP_TIMER0;
|
|
u32 other_itr = entry->entry | FM10K_INT_MAP_IMMEDIATE;
|
|
|
|
/* register mailbox handlers */
|
|
err = hw->mbx.ops.register_handlers(&hw->mbx, pf_mbx_data);
|
|
if (err)
|
|
return err;
|
|
|
|
/* request the IRQ */
|
|
err = request_irq(entry->vector, fm10k_msix_mbx_pf, 0,
|
|
dev->name, interface);
|
|
if (err) {
|
|
netif_err(interface, probe, dev,
|
|
"request_irq for msix_mbx failed: %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
/* Enable interrupts w/ no moderation for "other" interrupts */
|
|
fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_pcie_fault), other_itr);
|
|
fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_switch_up_down), other_itr);
|
|
fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_sram), other_itr);
|
|
fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_max_hold_time), other_itr);
|
|
fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_vflr), other_itr);
|
|
|
|
/* Enable interrupts w/ moderation for mailbox */
|
|
fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_mailbox), mbx_itr);
|
|
|
|
/* Enable individual interrupt causes */
|
|
fm10k_write_reg(hw, FM10K_EIMR, FM10K_EIMR_ENABLE(PCA_FAULT) |
|
|
FM10K_EIMR_ENABLE(FUM_FAULT) |
|
|
FM10K_EIMR_ENABLE(MAILBOX) |
|
|
FM10K_EIMR_ENABLE(SWITCHREADY) |
|
|
FM10K_EIMR_ENABLE(SWITCHNOTREADY) |
|
|
FM10K_EIMR_ENABLE(SRAMERROR) |
|
|
FM10K_EIMR_ENABLE(VFLR) |
|
|
FM10K_EIMR_ENABLE(MAXHOLDTIME));
|
|
|
|
/* enable interrupt */
|
|
fm10k_write_reg(hw, FM10K_ITR(entry->entry), FM10K_ITR_ENABLE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int fm10k_mbx_request_irq(struct fm10k_intfc *interface)
|
|
{
|
|
struct fm10k_hw *hw = &interface->hw;
|
|
int err;
|
|
|
|
/* enable Mailbox cause */
|
|
if (hw->mac.type == fm10k_mac_pf)
|
|
err = fm10k_mbx_request_irq_pf(interface);
|
|
else
|
|
err = fm10k_mbx_request_irq_vf(interface);
|
|
if (err)
|
|
return err;
|
|
|
|
/* connect mailbox */
|
|
err = hw->mbx.ops.connect(hw, &hw->mbx);
|
|
|
|
/* if the mailbox failed to connect, then free IRQ */
|
|
if (err)
|
|
fm10k_mbx_free_irq(interface);
|
|
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* fm10k_qv_free_irq - release interrupts associated with queue vectors
|
|
* @interface: board private structure
|
|
*
|
|
* Release all interrupts associated with this interface
|
|
**/
|
|
void fm10k_qv_free_irq(struct fm10k_intfc *interface)
|
|
{
|
|
int vector = interface->num_q_vectors;
|
|
struct fm10k_hw *hw = &interface->hw;
|
|
struct msix_entry *entry;
|
|
|
|
entry = &interface->msix_entries[NON_Q_VECTORS(hw) + vector];
|
|
|
|
while (vector) {
|
|
struct fm10k_q_vector *q_vector;
|
|
|
|
vector--;
|
|
entry--;
|
|
q_vector = interface->q_vector[vector];
|
|
|
|
if (!q_vector->tx.count && !q_vector->rx.count)
|
|
continue;
|
|
|
|
/* clear the affinity_mask in the IRQ descriptor */
|
|
irq_set_affinity_hint(entry->vector, NULL);
|
|
|
|
/* disable interrupts */
|
|
writel(FM10K_ITR_MASK_SET, q_vector->itr);
|
|
|
|
free_irq(entry->vector, q_vector);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* fm10k_qv_request_irq - initialize interrupts for queue vectors
|
|
* @interface: board private structure
|
|
*
|
|
* Attempts to configure interrupts using the best available
|
|
* capabilities of the hardware and kernel.
|
|
**/
|
|
int fm10k_qv_request_irq(struct fm10k_intfc *interface)
|
|
{
|
|
struct net_device *dev = interface->netdev;
|
|
struct fm10k_hw *hw = &interface->hw;
|
|
struct msix_entry *entry;
|
|
unsigned int ri = 0, ti = 0;
|
|
int vector, err;
|
|
|
|
entry = &interface->msix_entries[NON_Q_VECTORS(hw)];
|
|
|
|
for (vector = 0; vector < interface->num_q_vectors; vector++) {
|
|
struct fm10k_q_vector *q_vector = interface->q_vector[vector];
|
|
|
|
/* name the vector */
|
|
if (q_vector->tx.count && q_vector->rx.count) {
|
|
snprintf(q_vector->name, sizeof(q_vector->name),
|
|
"%s-TxRx-%u", dev->name, ri++);
|
|
ti++;
|
|
} else if (q_vector->rx.count) {
|
|
snprintf(q_vector->name, sizeof(q_vector->name),
|
|
"%s-rx-%u", dev->name, ri++);
|
|
} else if (q_vector->tx.count) {
|
|
snprintf(q_vector->name, sizeof(q_vector->name),
|
|
"%s-tx-%u", dev->name, ti++);
|
|
} else {
|
|
/* skip this unused q_vector */
|
|
continue;
|
|
}
|
|
|
|
/* Assign ITR register to q_vector */
|
|
q_vector->itr = (hw->mac.type == fm10k_mac_pf) ?
|
|
&interface->uc_addr[FM10K_ITR(entry->entry)] :
|
|
&interface->uc_addr[FM10K_VFITR(entry->entry)];
|
|
|
|
/* request the IRQ */
|
|
err = request_irq(entry->vector, &fm10k_msix_clean_rings, 0,
|
|
q_vector->name, q_vector);
|
|
if (err) {
|
|
netif_err(interface, probe, dev,
|
|
"request_irq failed for MSIX interrupt Error: %d\n",
|
|
err);
|
|
goto err_out;
|
|
}
|
|
|
|
/* assign the mask for this irq */
|
|
irq_set_affinity_hint(entry->vector, &q_vector->affinity_mask);
|
|
|
|
/* Enable q_vector */
|
|
writel(FM10K_ITR_ENABLE, q_vector->itr);
|
|
|
|
entry++;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_out:
|
|
/* wind through the ring freeing all entries and vectors */
|
|
while (vector) {
|
|
struct fm10k_q_vector *q_vector;
|
|
|
|
entry--;
|
|
vector--;
|
|
q_vector = interface->q_vector[vector];
|
|
|
|
if (!q_vector->tx.count && !q_vector->rx.count)
|
|
continue;
|
|
|
|
/* clear the affinity_mask in the IRQ descriptor */
|
|
irq_set_affinity_hint(entry->vector, NULL);
|
|
|
|
/* disable interrupts */
|
|
writel(FM10K_ITR_MASK_SET, q_vector->itr);
|
|
|
|
free_irq(entry->vector, q_vector);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
void fm10k_up(struct fm10k_intfc *interface)
|
|
{
|
|
struct fm10k_hw *hw = &interface->hw;
|
|
|
|
/* Enable Tx/Rx DMA */
|
|
hw->mac.ops.start_hw(hw);
|
|
|
|
/* configure Tx descriptor rings */
|
|
fm10k_configure_tx(interface);
|
|
|
|
/* configure Rx descriptor rings */
|
|
fm10k_configure_rx(interface);
|
|
|
|
/* configure interrupts */
|
|
hw->mac.ops.update_int_moderator(hw);
|
|
|
|
/* enable statistics capture again */
|
|
clear_bit(__FM10K_UPDATING_STATS, interface->state);
|
|
|
|
/* clear down bit to indicate we are ready to go */
|
|
clear_bit(__FM10K_DOWN, interface->state);
|
|
|
|
/* enable polling cleanups */
|
|
fm10k_napi_enable_all(interface);
|
|
|
|
/* re-establish Rx filters */
|
|
fm10k_restore_rx_state(interface);
|
|
|
|
/* enable transmits */
|
|
netif_tx_start_all_queues(interface->netdev);
|
|
|
|
/* kick off the service timer now */
|
|
hw->mac.get_host_state = true;
|
|
mod_timer(&interface->service_timer, jiffies);
|
|
}
|
|
|
|
static void fm10k_napi_disable_all(struct fm10k_intfc *interface)
|
|
{
|
|
struct fm10k_q_vector *q_vector;
|
|
int q_idx;
|
|
|
|
for (q_idx = 0; q_idx < interface->num_q_vectors; q_idx++) {
|
|
q_vector = interface->q_vector[q_idx];
|
|
napi_disable(&q_vector->napi);
|
|
}
|
|
}
|
|
|
|
void fm10k_down(struct fm10k_intfc *interface)
|
|
{
|
|
struct net_device *netdev = interface->netdev;
|
|
struct fm10k_hw *hw = &interface->hw;
|
|
int err, i = 0, count = 0;
|
|
|
|
/* signal that we are down to the interrupt handler and service task */
|
|
if (test_and_set_bit(__FM10K_DOWN, interface->state))
|
|
return;
|
|
|
|
/* call carrier off first to avoid false dev_watchdog timeouts */
|
|
netif_carrier_off(netdev);
|
|
|
|
/* disable transmits */
|
|
netif_tx_stop_all_queues(netdev);
|
|
netif_tx_disable(netdev);
|
|
|
|
/* reset Rx filters */
|
|
fm10k_reset_rx_state(interface);
|
|
|
|
/* disable polling routines */
|
|
fm10k_napi_disable_all(interface);
|
|
|
|
/* capture stats one last time before stopping interface */
|
|
fm10k_update_stats(interface);
|
|
|
|
/* prevent updating statistics while we're down */
|
|
while (test_and_set_bit(__FM10K_UPDATING_STATS, interface->state))
|
|
usleep_range(1000, 2000);
|
|
|
|
/* skip waiting for TX DMA if we lost PCIe link */
|
|
if (FM10K_REMOVED(hw->hw_addr))
|
|
goto skip_tx_dma_drain;
|
|
|
|
/* In some rare circumstances it can take a while for Tx queues to
|
|
* quiesce and be fully disabled. Attempt to .stop_hw() first, and
|
|
* then if we get ERR_REQUESTS_PENDING, go ahead and wait in a loop
|
|
* until the Tx queues have emptied, or until a number of retries. If
|
|
* we fail to clear within the retry loop, we will issue a warning
|
|
* indicating that Tx DMA is probably hung. Note this means we call
|
|
* .stop_hw() twice but this shouldn't cause any problems.
|
|
*/
|
|
err = hw->mac.ops.stop_hw(hw);
|
|
if (err != FM10K_ERR_REQUESTS_PENDING)
|
|
goto skip_tx_dma_drain;
|
|
|
|
#define TX_DMA_DRAIN_RETRIES 25
|
|
for (count = 0; count < TX_DMA_DRAIN_RETRIES; count++) {
|
|
usleep_range(10000, 20000);
|
|
|
|
/* start checking at the last ring to have pending Tx */
|
|
for (; i < interface->num_tx_queues; i++)
|
|
if (fm10k_get_tx_pending(interface->tx_ring[i], false))
|
|
break;
|
|
|
|
/* if all the queues are drained, we can break now */
|
|
if (i == interface->num_tx_queues)
|
|
break;
|
|
}
|
|
|
|
if (count >= TX_DMA_DRAIN_RETRIES)
|
|
dev_err(&interface->pdev->dev,
|
|
"Tx queues failed to drain after %d tries. Tx DMA is probably hung.\n",
|
|
count);
|
|
skip_tx_dma_drain:
|
|
/* Disable DMA engine for Tx/Rx */
|
|
err = hw->mac.ops.stop_hw(hw);
|
|
if (err == FM10K_ERR_REQUESTS_PENDING)
|
|
dev_err(&interface->pdev->dev,
|
|
"due to pending requests hw was not shut down gracefully\n");
|
|
else if (err)
|
|
dev_err(&interface->pdev->dev, "stop_hw failed: %d\n", err);
|
|
|
|
/* free any buffers still on the rings */
|
|
fm10k_clean_all_tx_rings(interface);
|
|
fm10k_clean_all_rx_rings(interface);
|
|
}
|
|
|
|
/**
|
|
* fm10k_sw_init - Initialize general software structures
|
|
* @interface: host interface private structure to initialize
|
|
*
|
|
* fm10k_sw_init initializes the interface private data structure.
|
|
* Fields are initialized based on PCI device information and
|
|
* OS network device settings (MTU size).
|
|
**/
|
|
static int fm10k_sw_init(struct fm10k_intfc *interface,
|
|
const struct pci_device_id *ent)
|
|
{
|
|
const struct fm10k_info *fi = fm10k_info_tbl[ent->driver_data];
|
|
struct fm10k_hw *hw = &interface->hw;
|
|
struct pci_dev *pdev = interface->pdev;
|
|
struct net_device *netdev = interface->netdev;
|
|
u32 rss_key[FM10K_RSSRK_SIZE];
|
|
unsigned int rss;
|
|
int err;
|
|
|
|
/* initialize back pointer */
|
|
hw->back = interface;
|
|
hw->hw_addr = interface->uc_addr;
|
|
|
|
/* PCI config space info */
|
|
hw->vendor_id = pdev->vendor;
|
|
hw->device_id = pdev->device;
|
|
hw->revision_id = pdev->revision;
|
|
hw->subsystem_vendor_id = pdev->subsystem_vendor;
|
|
hw->subsystem_device_id = pdev->subsystem_device;
|
|
|
|
/* Setup hw api */
|
|
memcpy(&hw->mac.ops, fi->mac_ops, sizeof(hw->mac.ops));
|
|
hw->mac.type = fi->mac;
|
|
|
|
/* Setup IOV handlers */
|
|
if (fi->iov_ops)
|
|
memcpy(&hw->iov.ops, fi->iov_ops, sizeof(hw->iov.ops));
|
|
|
|
/* Set common capability flags and settings */
|
|
rss = min_t(int, FM10K_MAX_RSS_INDICES, num_online_cpus());
|
|
interface->ring_feature[RING_F_RSS].limit = rss;
|
|
fi->get_invariants(hw);
|
|
|
|
/* pick up the PCIe bus settings for reporting later */
|
|
if (hw->mac.ops.get_bus_info)
|
|
hw->mac.ops.get_bus_info(hw);
|
|
|
|
/* limit the usable DMA range */
|
|
if (hw->mac.ops.set_dma_mask)
|
|
hw->mac.ops.set_dma_mask(hw, dma_get_mask(&pdev->dev));
|
|
|
|
/* update netdev with DMA restrictions */
|
|
if (dma_get_mask(&pdev->dev) > DMA_BIT_MASK(32)) {
|
|
netdev->features |= NETIF_F_HIGHDMA;
|
|
netdev->vlan_features |= NETIF_F_HIGHDMA;
|
|
}
|
|
|
|
/* reset and initialize the hardware so it is in a known state */
|
|
err = hw->mac.ops.reset_hw(hw);
|
|
if (err) {
|
|
dev_err(&pdev->dev, "reset_hw failed: %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
err = hw->mac.ops.init_hw(hw);
|
|
if (err) {
|
|
dev_err(&pdev->dev, "init_hw failed: %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
/* initialize hardware statistics */
|
|
hw->mac.ops.update_hw_stats(hw, &interface->stats);
|
|
|
|
/* Set upper limit on IOV VFs that can be allocated */
|
|
pci_sriov_set_totalvfs(pdev, hw->iov.total_vfs);
|
|
|
|
/* Start with random Ethernet address */
|
|
eth_random_addr(hw->mac.addr);
|
|
|
|
/* Initialize MAC address from hardware */
|
|
err = hw->mac.ops.read_mac_addr(hw);
|
|
if (err) {
|
|
dev_warn(&pdev->dev,
|
|
"Failed to obtain MAC address defaulting to random\n");
|
|
/* tag address assignment as random */
|
|
netdev->addr_assign_type |= NET_ADDR_RANDOM;
|
|
}
|
|
|
|
ether_addr_copy(netdev->dev_addr, hw->mac.addr);
|
|
ether_addr_copy(netdev->perm_addr, hw->mac.addr);
|
|
|
|
if (!is_valid_ether_addr(netdev->perm_addr)) {
|
|
dev_err(&pdev->dev, "Invalid MAC Address\n");
|
|
return -EIO;
|
|
}
|
|
|
|
/* initialize DCBNL interface */
|
|
fm10k_dcbnl_set_ops(netdev);
|
|
|
|
/* set default ring sizes */
|
|
interface->tx_ring_count = FM10K_DEFAULT_TXD;
|
|
interface->rx_ring_count = FM10K_DEFAULT_RXD;
|
|
|
|
/* set default interrupt moderation */
|
|
interface->tx_itr = FM10K_TX_ITR_DEFAULT;
|
|
interface->rx_itr = FM10K_ITR_ADAPTIVE | FM10K_RX_ITR_DEFAULT;
|
|
|
|
/* initialize udp port lists */
|
|
INIT_LIST_HEAD(&interface->vxlan_port);
|
|
INIT_LIST_HEAD(&interface->geneve_port);
|
|
|
|
/* Initialize the MAC/VLAN queue */
|
|
INIT_LIST_HEAD(&interface->macvlan_requests);
|
|
|
|
netdev_rss_key_fill(rss_key, sizeof(rss_key));
|
|
memcpy(interface->rssrk, rss_key, sizeof(rss_key));
|
|
|
|
/* Initialize the mailbox lock */
|
|
spin_lock_init(&interface->mbx_lock);
|
|
spin_lock_init(&interface->macvlan_lock);
|
|
|
|
/* Start off interface as being down */
|
|
set_bit(__FM10K_DOWN, interface->state);
|
|
set_bit(__FM10K_UPDATING_STATS, interface->state);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void fm10k_slot_warn(struct fm10k_intfc *interface)
|
|
{
|
|
enum pcie_link_width width = PCIE_LNK_WIDTH_UNKNOWN;
|
|
enum pci_bus_speed speed = PCI_SPEED_UNKNOWN;
|
|
struct fm10k_hw *hw = &interface->hw;
|
|
int max_gts = 0, expected_gts = 0;
|
|
|
|
if (pcie_get_minimum_link(interface->pdev, &speed, &width) ||
|
|
speed == PCI_SPEED_UNKNOWN || width == PCIE_LNK_WIDTH_UNKNOWN) {
|
|
dev_warn(&interface->pdev->dev,
|
|
"Unable to determine PCI Express bandwidth.\n");
|
|
return;
|
|
}
|
|
|
|
switch (speed) {
|
|
case PCIE_SPEED_2_5GT:
|
|
/* 8b/10b encoding reduces max throughput by 20% */
|
|
max_gts = 2 * width;
|
|
break;
|
|
case PCIE_SPEED_5_0GT:
|
|
/* 8b/10b encoding reduces max throughput by 20% */
|
|
max_gts = 4 * width;
|
|
break;
|
|
case PCIE_SPEED_8_0GT:
|
|
/* 128b/130b encoding has less than 2% impact on throughput */
|
|
max_gts = 8 * width;
|
|
break;
|
|
default:
|
|
dev_warn(&interface->pdev->dev,
|
|
"Unable to determine PCI Express bandwidth.\n");
|
|
return;
|
|
}
|
|
|
|
dev_info(&interface->pdev->dev,
|
|
"PCI Express bandwidth of %dGT/s available\n",
|
|
max_gts);
|
|
dev_info(&interface->pdev->dev,
|
|
"(Speed:%s, Width: x%d, Encoding Loss:%s, Payload:%s)\n",
|
|
(speed == PCIE_SPEED_8_0GT ? "8.0GT/s" :
|
|
speed == PCIE_SPEED_5_0GT ? "5.0GT/s" :
|
|
speed == PCIE_SPEED_2_5GT ? "2.5GT/s" :
|
|
"Unknown"),
|
|
hw->bus.width,
|
|
(speed == PCIE_SPEED_2_5GT ? "20%" :
|
|
speed == PCIE_SPEED_5_0GT ? "20%" :
|
|
speed == PCIE_SPEED_8_0GT ? "<2%" :
|
|
"Unknown"),
|
|
(hw->bus.payload == fm10k_bus_payload_128 ? "128B" :
|
|
hw->bus.payload == fm10k_bus_payload_256 ? "256B" :
|
|
hw->bus.payload == fm10k_bus_payload_512 ? "512B" :
|
|
"Unknown"));
|
|
|
|
switch (hw->bus_caps.speed) {
|
|
case fm10k_bus_speed_2500:
|
|
/* 8b/10b encoding reduces max throughput by 20% */
|
|
expected_gts = 2 * hw->bus_caps.width;
|
|
break;
|
|
case fm10k_bus_speed_5000:
|
|
/* 8b/10b encoding reduces max throughput by 20% */
|
|
expected_gts = 4 * hw->bus_caps.width;
|
|
break;
|
|
case fm10k_bus_speed_8000:
|
|
/* 128b/130b encoding has less than 2% impact on throughput */
|
|
expected_gts = 8 * hw->bus_caps.width;
|
|
break;
|
|
default:
|
|
dev_warn(&interface->pdev->dev,
|
|
"Unable to determine expected PCI Express bandwidth.\n");
|
|
return;
|
|
}
|
|
|
|
if (max_gts >= expected_gts)
|
|
return;
|
|
|
|
dev_warn(&interface->pdev->dev,
|
|
"This device requires %dGT/s of bandwidth for optimal performance.\n",
|
|
expected_gts);
|
|
dev_warn(&interface->pdev->dev,
|
|
"A %sslot with x%d lanes is suggested.\n",
|
|
(hw->bus_caps.speed == fm10k_bus_speed_2500 ? "2.5GT/s " :
|
|
hw->bus_caps.speed == fm10k_bus_speed_5000 ? "5.0GT/s " :
|
|
hw->bus_caps.speed == fm10k_bus_speed_8000 ? "8.0GT/s " : ""),
|
|
hw->bus_caps.width);
|
|
}
|
|
|
|
/**
|
|
* fm10k_probe - Device Initialization Routine
|
|
* @pdev: PCI device information struct
|
|
* @ent: entry in fm10k_pci_tbl
|
|
*
|
|
* Returns 0 on success, negative on failure
|
|
*
|
|
* fm10k_probe initializes an interface identified by a pci_dev structure.
|
|
* The OS initialization, configuring of the interface private structure,
|
|
* and a hardware reset occur.
|
|
**/
|
|
static int fm10k_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
|
|
{
|
|
struct net_device *netdev;
|
|
struct fm10k_intfc *interface;
|
|
int err;
|
|
|
|
if (pdev->error_state != pci_channel_io_normal) {
|
|
dev_err(&pdev->dev,
|
|
"PCI device still in an error state. Unable to load...\n");
|
|
return -EIO;
|
|
}
|
|
|
|
err = pci_enable_device_mem(pdev);
|
|
if (err) {
|
|
dev_err(&pdev->dev,
|
|
"PCI enable device failed: %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(48));
|
|
if (err)
|
|
err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
|
|
if (err) {
|
|
dev_err(&pdev->dev,
|
|
"DMA configuration failed: %d\n", err);
|
|
goto err_dma;
|
|
}
|
|
|
|
err = pci_request_mem_regions(pdev, fm10k_driver_name);
|
|
if (err) {
|
|
dev_err(&pdev->dev,
|
|
"pci_request_selected_regions failed: %d\n", err);
|
|
goto err_pci_reg;
|
|
}
|
|
|
|
pci_enable_pcie_error_reporting(pdev);
|
|
|
|
pci_set_master(pdev);
|
|
pci_save_state(pdev);
|
|
|
|
netdev = fm10k_alloc_netdev(fm10k_info_tbl[ent->driver_data]);
|
|
if (!netdev) {
|
|
err = -ENOMEM;
|
|
goto err_alloc_netdev;
|
|
}
|
|
|
|
SET_NETDEV_DEV(netdev, &pdev->dev);
|
|
|
|
interface = netdev_priv(netdev);
|
|
pci_set_drvdata(pdev, interface);
|
|
|
|
interface->netdev = netdev;
|
|
interface->pdev = pdev;
|
|
|
|
interface->uc_addr = ioremap(pci_resource_start(pdev, 0),
|
|
FM10K_UC_ADDR_SIZE);
|
|
if (!interface->uc_addr) {
|
|
err = -EIO;
|
|
goto err_ioremap;
|
|
}
|
|
|
|
err = fm10k_sw_init(interface, ent);
|
|
if (err)
|
|
goto err_sw_init;
|
|
|
|
/* enable debugfs support */
|
|
fm10k_dbg_intfc_init(interface);
|
|
|
|
err = fm10k_init_queueing_scheme(interface);
|
|
if (err)
|
|
goto err_sw_init;
|
|
|
|
/* the mbx interrupt might attempt to schedule the service task, so we
|
|
* must ensure it is disabled since we haven't yet requested the timer
|
|
* or work item.
|
|
*/
|
|
set_bit(__FM10K_SERVICE_DISABLE, interface->state);
|
|
|
|
err = fm10k_mbx_request_irq(interface);
|
|
if (err)
|
|
goto err_mbx_interrupt;
|
|
|
|
/* final check of hardware state before registering the interface */
|
|
err = fm10k_hw_ready(interface);
|
|
if (err)
|
|
goto err_register;
|
|
|
|
err = register_netdev(netdev);
|
|
if (err)
|
|
goto err_register;
|
|
|
|
/* carrier off reporting is important to ethtool even BEFORE open */
|
|
netif_carrier_off(netdev);
|
|
|
|
/* stop all the transmit queues from transmitting until link is up */
|
|
netif_tx_stop_all_queues(netdev);
|
|
|
|
/* Initialize service timer and service task late in order to avoid
|
|
* cleanup issues.
|
|
*/
|
|
timer_setup(&interface->service_timer, fm10k_service_timer, 0);
|
|
INIT_WORK(&interface->service_task, fm10k_service_task);
|
|
|
|
/* Setup the MAC/VLAN queue */
|
|
INIT_DELAYED_WORK(&interface->macvlan_task, fm10k_macvlan_task);
|
|
|
|
/* kick off service timer now, even when interface is down */
|
|
mod_timer(&interface->service_timer, (HZ * 2) + jiffies);
|
|
|
|
/* print warning for non-optimal configurations */
|
|
fm10k_slot_warn(interface);
|
|
|
|
/* report MAC address for logging */
|
|
dev_info(&pdev->dev, "%pM\n", netdev->dev_addr);
|
|
|
|
/* enable SR-IOV after registering netdev to enforce PF/VF ordering */
|
|
fm10k_iov_configure(pdev, 0);
|
|
|
|
/* clear the service task disable bit and kick off service task */
|
|
clear_bit(__FM10K_SERVICE_DISABLE, interface->state);
|
|
fm10k_service_event_schedule(interface);
|
|
|
|
return 0;
|
|
|
|
err_register:
|
|
fm10k_mbx_free_irq(interface);
|
|
err_mbx_interrupt:
|
|
fm10k_clear_queueing_scheme(interface);
|
|
err_sw_init:
|
|
if (interface->sw_addr)
|
|
iounmap(interface->sw_addr);
|
|
iounmap(interface->uc_addr);
|
|
err_ioremap:
|
|
free_netdev(netdev);
|
|
err_alloc_netdev:
|
|
pci_release_mem_regions(pdev);
|
|
err_pci_reg:
|
|
err_dma:
|
|
pci_disable_device(pdev);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* fm10k_remove - Device Removal Routine
|
|
* @pdev: PCI device information struct
|
|
*
|
|
* fm10k_remove is called by the PCI subsystem to alert the driver
|
|
* that it should release a PCI device. The could be caused by a
|
|
* Hot-Plug event, or because the driver is going to be removed from
|
|
* memory.
|
|
**/
|
|
static void fm10k_remove(struct pci_dev *pdev)
|
|
{
|
|
struct fm10k_intfc *interface = pci_get_drvdata(pdev);
|
|
struct net_device *netdev = interface->netdev;
|
|
|
|
del_timer_sync(&interface->service_timer);
|
|
|
|
fm10k_stop_service_event(interface);
|
|
fm10k_stop_macvlan_task(interface);
|
|
|
|
/* Remove all pending MAC/VLAN requests */
|
|
fm10k_clear_macvlan_queue(interface, interface->glort, true);
|
|
|
|
/* free netdev, this may bounce the interrupts due to setup_tc */
|
|
if (netdev->reg_state == NETREG_REGISTERED)
|
|
unregister_netdev(netdev);
|
|
|
|
/* release VFs */
|
|
fm10k_iov_disable(pdev);
|
|
|
|
/* disable mailbox interrupt */
|
|
fm10k_mbx_free_irq(interface);
|
|
|
|
/* free interrupts */
|
|
fm10k_clear_queueing_scheme(interface);
|
|
|
|
/* remove any debugfs interfaces */
|
|
fm10k_dbg_intfc_exit(interface);
|
|
|
|
if (interface->sw_addr)
|
|
iounmap(interface->sw_addr);
|
|
iounmap(interface->uc_addr);
|
|
|
|
free_netdev(netdev);
|
|
|
|
pci_release_mem_regions(pdev);
|
|
|
|
pci_disable_pcie_error_reporting(pdev);
|
|
|
|
pci_disable_device(pdev);
|
|
}
|
|
|
|
static void fm10k_prepare_suspend(struct fm10k_intfc *interface)
|
|
{
|
|
/* the watchdog task reads from registers, which might appear like
|
|
* a surprise remove if the PCIe device is disabled while we're
|
|
* stopped. We stop the watchdog task until after we resume software
|
|
* activity.
|
|
*
|
|
* Note that the MAC/VLAN task will be stopped as part of preparing
|
|
* for reset so we don't need to handle it here.
|
|
*/
|
|
fm10k_stop_service_event(interface);
|
|
|
|
if (fm10k_prepare_for_reset(interface))
|
|
set_bit(__FM10K_RESET_SUSPENDED, interface->state);
|
|
}
|
|
|
|
static int fm10k_handle_resume(struct fm10k_intfc *interface)
|
|
{
|
|
struct fm10k_hw *hw = &interface->hw;
|
|
int err;
|
|
|
|
/* Even if we didn't properly prepare for reset in
|
|
* fm10k_prepare_suspend, we'll attempt to resume anyways.
|
|
*/
|
|
if (!test_and_clear_bit(__FM10K_RESET_SUSPENDED, interface->state))
|
|
dev_warn(&interface->pdev->dev,
|
|
"Device was shut down as part of suspend... Attempting to recover\n");
|
|
|
|
/* reset statistics starting values */
|
|
hw->mac.ops.rebind_hw_stats(hw, &interface->stats);
|
|
|
|
err = fm10k_handle_reset(interface);
|
|
if (err)
|
|
return err;
|
|
|
|
/* assume host is not ready, to prevent race with watchdog in case we
|
|
* actually don't have connection to the switch
|
|
*/
|
|
interface->host_ready = false;
|
|
fm10k_watchdog_host_not_ready(interface);
|
|
|
|
/* force link to stay down for a second to prevent link flutter */
|
|
interface->link_down_event = jiffies + (HZ);
|
|
set_bit(__FM10K_LINK_DOWN, interface->state);
|
|
|
|
/* restart the service task */
|
|
fm10k_start_service_event(interface);
|
|
|
|
/* Restart the MAC/VLAN request queue in-case of outstanding events */
|
|
fm10k_macvlan_schedule(interface);
|
|
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* fm10k_resume - Generic PM resume hook
|
|
* @dev: generic device structure
|
|
*
|
|
* Generic PM hook used when waking the device from a low power state after
|
|
* suspend or hibernation. This function does not need to handle lower PCIe
|
|
* device state as the stack takes care of that for us.
|
|
**/
|
|
static int __maybe_unused fm10k_resume(struct device *dev)
|
|
{
|
|
struct fm10k_intfc *interface = pci_get_drvdata(to_pci_dev(dev));
|
|
struct net_device *netdev = interface->netdev;
|
|
struct fm10k_hw *hw = &interface->hw;
|
|
int err;
|
|
|
|
/* refresh hw_addr in case it was dropped */
|
|
hw->hw_addr = interface->uc_addr;
|
|
|
|
err = fm10k_handle_resume(interface);
|
|
if (err)
|
|
return err;
|
|
|
|
netif_device_attach(netdev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* fm10k_suspend - Generic PM suspend hook
|
|
* @dev: generic device structure
|
|
*
|
|
* Generic PM hook used when setting the device into a low power state for
|
|
* system suspend or hibernation. This function does not need to handle lower
|
|
* PCIe device state as the stack takes care of that for us.
|
|
**/
|
|
static int __maybe_unused fm10k_suspend(struct device *dev)
|
|
{
|
|
struct fm10k_intfc *interface = pci_get_drvdata(to_pci_dev(dev));
|
|
struct net_device *netdev = interface->netdev;
|
|
|
|
netif_device_detach(netdev);
|
|
|
|
fm10k_prepare_suspend(interface);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* fm10k_io_error_detected - called when PCI error is detected
|
|
* @pdev: Pointer to PCI device
|
|
* @state: The current pci connection state
|
|
*
|
|
* This function is called after a PCI bus error affecting
|
|
* this device has been detected.
|
|
*/
|
|
static pci_ers_result_t fm10k_io_error_detected(struct pci_dev *pdev,
|
|
pci_channel_state_t state)
|
|
{
|
|
struct fm10k_intfc *interface = pci_get_drvdata(pdev);
|
|
struct net_device *netdev = interface->netdev;
|
|
|
|
netif_device_detach(netdev);
|
|
|
|
if (state == pci_channel_io_perm_failure)
|
|
return PCI_ERS_RESULT_DISCONNECT;
|
|
|
|
fm10k_prepare_suspend(interface);
|
|
|
|
/* Request a slot reset. */
|
|
return PCI_ERS_RESULT_NEED_RESET;
|
|
}
|
|
|
|
/**
|
|
* fm10k_io_slot_reset - called after the pci bus has been reset.
|
|
* @pdev: Pointer to PCI device
|
|
*
|
|
* Restart the card from scratch, as if from a cold-boot.
|
|
*/
|
|
static pci_ers_result_t fm10k_io_slot_reset(struct pci_dev *pdev)
|
|
{
|
|
pci_ers_result_t result;
|
|
|
|
if (pci_reenable_device(pdev)) {
|
|
dev_err(&pdev->dev,
|
|
"Cannot re-enable PCI device after reset.\n");
|
|
result = PCI_ERS_RESULT_DISCONNECT;
|
|
} else {
|
|
pci_set_master(pdev);
|
|
pci_restore_state(pdev);
|
|
|
|
/* After second error pci->state_saved is false, this
|
|
* resets it so EEH doesn't break.
|
|
*/
|
|
pci_save_state(pdev);
|
|
|
|
pci_wake_from_d3(pdev, false);
|
|
|
|
result = PCI_ERS_RESULT_RECOVERED;
|
|
}
|
|
|
|
pci_cleanup_aer_uncorrect_error_status(pdev);
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* fm10k_io_resume - called when traffic can start flowing again.
|
|
* @pdev: Pointer to PCI device
|
|
*
|
|
* This callback is called when the error recovery driver tells us that
|
|
* its OK to resume normal operation.
|
|
*/
|
|
static void fm10k_io_resume(struct pci_dev *pdev)
|
|
{
|
|
struct fm10k_intfc *interface = pci_get_drvdata(pdev);
|
|
struct net_device *netdev = interface->netdev;
|
|
int err;
|
|
|
|
err = fm10k_handle_resume(interface);
|
|
|
|
if (err)
|
|
dev_warn(&pdev->dev,
|
|
"%s failed: %d\n", __func__, err);
|
|
else
|
|
netif_device_attach(netdev);
|
|
}
|
|
|
|
/**
|
|
* fm10k_io_reset_prepare - called when PCI function is about to be reset
|
|
* @pdev: Pointer to PCI device
|
|
*
|
|
* This callback is called when the PCI function is about to be reset,
|
|
* allowing the device driver to prepare for it.
|
|
*/
|
|
static void fm10k_io_reset_prepare(struct pci_dev *pdev)
|
|
{
|
|
/* warn incase we have any active VF devices */
|
|
if (pci_num_vf(pdev))
|
|
dev_warn(&pdev->dev,
|
|
"PCIe FLR may cause issues for any active VF devices\n");
|
|
fm10k_prepare_suspend(pci_get_drvdata(pdev));
|
|
}
|
|
|
|
/**
|
|
* fm10k_io_reset_done - called when PCI function has finished resetting
|
|
* @pdev: Pointer to PCI device
|
|
*
|
|
* This callback is called just after the PCI function is reset, such as via
|
|
* /sys/class/net/<enpX>/device/reset or similar.
|
|
*/
|
|
static void fm10k_io_reset_done(struct pci_dev *pdev)
|
|
{
|
|
struct fm10k_intfc *interface = pci_get_drvdata(pdev);
|
|
int err = fm10k_handle_resume(interface);
|
|
|
|
if (err) {
|
|
dev_warn(&pdev->dev,
|
|
"%s failed: %d\n", __func__, err);
|
|
netif_device_detach(interface->netdev);
|
|
}
|
|
}
|
|
|
|
static const struct pci_error_handlers fm10k_err_handler = {
|
|
.error_detected = fm10k_io_error_detected,
|
|
.slot_reset = fm10k_io_slot_reset,
|
|
.resume = fm10k_io_resume,
|
|
.reset_prepare = fm10k_io_reset_prepare,
|
|
.reset_done = fm10k_io_reset_done,
|
|
};
|
|
|
|
static SIMPLE_DEV_PM_OPS(fm10k_pm_ops, fm10k_suspend, fm10k_resume);
|
|
|
|
static struct pci_driver fm10k_driver = {
|
|
.name = fm10k_driver_name,
|
|
.id_table = fm10k_pci_tbl,
|
|
.probe = fm10k_probe,
|
|
.remove = fm10k_remove,
|
|
.driver = {
|
|
.pm = &fm10k_pm_ops,
|
|
},
|
|
.sriov_configure = fm10k_iov_configure,
|
|
.err_handler = &fm10k_err_handler
|
|
};
|
|
|
|
/**
|
|
* fm10k_register_pci_driver - register driver interface
|
|
*
|
|
* This function is called on module load in order to register the driver.
|
|
**/
|
|
int fm10k_register_pci_driver(void)
|
|
{
|
|
return pci_register_driver(&fm10k_driver);
|
|
}
|
|
|
|
/**
|
|
* fm10k_unregister_pci_driver - unregister driver interface
|
|
*
|
|
* This function is called on module unload in order to remove the driver.
|
|
**/
|
|
void fm10k_unregister_pci_driver(void)
|
|
{
|
|
pci_unregister_driver(&fm10k_driver);
|
|
}
|