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- /* Intel Ethernet Switch Host Interface Driver
- * Copyright(c) 2013 - 2015 Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * The full GNU General Public License is included in this distribution in
- * the file called "COPYING".
- *
- * Contact Information:
- * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
- * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
- */
- #include <linux/module.h>
- #include <linux/aer.h>
- #include "fm10k.h"
- static const struct fm10k_info *fm10k_info_tbl[] = {
- [fm10k_device_pf] = &fm10k_pf_info,
- [fm10k_device_vf] = &fm10k_vf_info,
- };
- /**
- * fm10k_pci_tbl - PCI Device ID Table
- *
- * Wildcard entries (PCI_ANY_ID) should come last
- * Last entry must be all 0s
- *
- * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
- * Class, Class Mask, private data (not used) }
- */
- static const struct pci_device_id fm10k_pci_tbl[] = {
- { PCI_VDEVICE(INTEL, FM10K_DEV_ID_PF), fm10k_device_pf },
- { PCI_VDEVICE(INTEL, FM10K_DEV_ID_VF), fm10k_device_vf },
- /* required last entry */
- { 0, }
- };
- MODULE_DEVICE_TABLE(pci, fm10k_pci_tbl);
- u16 fm10k_read_pci_cfg_word(struct fm10k_hw *hw, u32 reg)
- {
- struct fm10k_intfc *interface = hw->back;
- u16 value = 0;
- if (FM10K_REMOVED(hw->hw_addr))
- return ~value;
- pci_read_config_word(interface->pdev, reg, &value);
- if (value == 0xFFFF)
- fm10k_write_flush(hw);
- return value;
- }
- u32 fm10k_read_reg(struct fm10k_hw *hw, int reg)
- {
- u32 __iomem *hw_addr = ACCESS_ONCE(hw->hw_addr);
- u32 value = 0;
- if (FM10K_REMOVED(hw_addr))
- return ~value;
- value = readl(&hw_addr[reg]);
- if (!(~value) && (!reg || !(~readl(hw_addr)))) {
- struct fm10k_intfc *interface = hw->back;
- struct net_device *netdev = interface->netdev;
- hw->hw_addr = NULL;
- netif_device_detach(netdev);
- netdev_err(netdev, "PCIe link lost, device now detached\n");
- }
- return value;
- }
- static int fm10k_hw_ready(struct fm10k_intfc *interface)
- {
- struct fm10k_hw *hw = &interface->hw;
- fm10k_write_flush(hw);
- return FM10K_REMOVED(hw->hw_addr) ? -ENODEV : 0;
- }
- void fm10k_service_event_schedule(struct fm10k_intfc *interface)
- {
- if (!test_bit(__FM10K_SERVICE_DISABLE, &interface->state) &&
- !test_and_set_bit(__FM10K_SERVICE_SCHED, &interface->state))
- queue_work(fm10k_workqueue, &interface->service_task);
- }
- static void fm10k_service_event_complete(struct fm10k_intfc *interface)
- {
- BUG_ON(!test_bit(__FM10K_SERVICE_SCHED, &interface->state));
- /* flush memory to make sure state is correct before next watchog */
- smp_mb__before_atomic();
- clear_bit(__FM10K_SERVICE_SCHED, &interface->state);
- }
- /**
- * fm10k_service_timer - Timer Call-back
- * @data: pointer to interface cast into an unsigned long
- **/
- static void fm10k_service_timer(unsigned long data)
- {
- struct fm10k_intfc *interface = (struct fm10k_intfc *)data;
- /* Reset the timer */
- mod_timer(&interface->service_timer, (HZ * 2) + jiffies);
- fm10k_service_event_schedule(interface);
- }
- static void fm10k_detach_subtask(struct fm10k_intfc *interface)
- {
- struct net_device *netdev = interface->netdev;
- /* do nothing if device is still present or hw_addr is set */
- if (netif_device_present(netdev) || interface->hw.hw_addr)
- return;
- rtnl_lock();
- if (netif_running(netdev))
- dev_close(netdev);
- rtnl_unlock();
- }
- static void fm10k_reinit(struct fm10k_intfc *interface)
- {
- struct net_device *netdev = interface->netdev;
- struct fm10k_hw *hw = &interface->hw;
- int err;
- WARN_ON(in_interrupt());
- /* put off any impending NetWatchDogTimeout */
- netdev->trans_start = jiffies;
- while (test_and_set_bit(__FM10K_RESETTING, &interface->state))
- usleep_range(1000, 2000);
- rtnl_lock();
- fm10k_iov_suspend(interface->pdev);
- if (netif_running(netdev))
- fm10k_close(netdev);
- fm10k_mbx_free_irq(interface);
- /* free interrupts */
- fm10k_clear_queueing_scheme(interface);
- /* delay any future reset requests */
- interface->last_reset = jiffies + (10 * HZ);
- /* reset and initialize the hardware so it is in a known state */
- err = hw->mac.ops.reset_hw(hw);
- if (err) {
- dev_err(&interface->pdev->dev, "reset_hw failed: %d\n", err);
- goto reinit_err;
- }
- err = hw->mac.ops.init_hw(hw);
- if (err) {
- dev_err(&interface->pdev->dev, "init_hw failed: %d\n", err);
- goto reinit_err;
- }
- err = fm10k_init_queueing_scheme(interface);
- if (err) {
- dev_err(&interface->pdev->dev, "init_queueing_scheme failed: %d\n", err);
- goto reinit_err;
- }
- /* reassociate interrupts */
- fm10k_mbx_request_irq(interface);
- /* update hardware address for VFs if perm_addr has changed */
- if (hw->mac.type == fm10k_mac_vf) {
- if (is_valid_ether_addr(hw->mac.perm_addr)) {
- ether_addr_copy(hw->mac.addr, hw->mac.perm_addr);
- ether_addr_copy(netdev->perm_addr, hw->mac.perm_addr);
- ether_addr_copy(netdev->dev_addr, hw->mac.perm_addr);
- netdev->addr_assign_type &= ~NET_ADDR_RANDOM;
- }
- if (hw->mac.vlan_override)
- netdev->features &= ~NETIF_F_HW_VLAN_CTAG_RX;
- else
- netdev->features |= NETIF_F_HW_VLAN_CTAG_RX;
- }
- /* reset clock */
- fm10k_ts_reset(interface);
- if (netif_running(netdev))
- fm10k_open(netdev);
- fm10k_iov_resume(interface->pdev);
- reinit_err:
- if (err)
- netif_device_detach(netdev);
- rtnl_unlock();
- clear_bit(__FM10K_RESETTING, &interface->state);
- }
- static void fm10k_reset_subtask(struct fm10k_intfc *interface)
- {
- if (!(interface->flags & FM10K_FLAG_RESET_REQUESTED))
- return;
- interface->flags &= ~FM10K_FLAG_RESET_REQUESTED;
- netdev_err(interface->netdev, "Reset interface\n");
- fm10k_reinit(interface);
- }
- /**
- * fm10k_configure_swpri_map - Configure Receive SWPRI to PC mapping
- * @interface: board private structure
- *
- * Configure the SWPRI to PC mapping for the port.
- **/
- static void fm10k_configure_swpri_map(struct fm10k_intfc *interface)
- {
- struct net_device *netdev = interface->netdev;
- struct fm10k_hw *hw = &interface->hw;
- int i;
- /* clear flag indicating update is needed */
- interface->flags &= ~FM10K_FLAG_SWPRI_CONFIG;
- /* these registers are only available on the PF */
- if (hw->mac.type != fm10k_mac_pf)
- return;
- /* configure SWPRI to PC map */
- for (i = 0; i < FM10K_SWPRI_MAX; i++)
- fm10k_write_reg(hw, FM10K_SWPRI_MAP(i),
- netdev_get_prio_tc_map(netdev, i));
- }
- /**
- * fm10k_watchdog_update_host_state - Update the link status based on host.
- * @interface: board private structure
- **/
- static void fm10k_watchdog_update_host_state(struct fm10k_intfc *interface)
- {
- struct fm10k_hw *hw = &interface->hw;
- s32 err;
- if (test_bit(__FM10K_LINK_DOWN, &interface->state)) {
- interface->host_ready = false;
- if (time_is_after_jiffies(interface->link_down_event))
- return;
- clear_bit(__FM10K_LINK_DOWN, &interface->state);
- }
- if (interface->flags & FM10K_FLAG_SWPRI_CONFIG) {
- if (rtnl_trylock()) {
- fm10k_configure_swpri_map(interface);
- rtnl_unlock();
- }
- }
- /* lock the mailbox for transmit and receive */
- fm10k_mbx_lock(interface);
- err = hw->mac.ops.get_host_state(hw, &interface->host_ready);
- if (err && time_is_before_jiffies(interface->last_reset))
- interface->flags |= FM10K_FLAG_RESET_REQUESTED;
- /* 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)
- {
- /* 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;
- /* 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 = interface->tx_ring[i];
- 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 = interface->rx_ring[i];
- 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;
- }
- /**
- * 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)
- interface->flags |= FM10K_FLAG_RESET_REQUESTED;
- }
- /**
- * 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);
- /* tasks run even when interface is down */
- fm10k_mbx_subtask(interface);
- fm10k_detach_subtask(interface);
- fm10k_reset_subtask(interface);
- /* tasks only run when interface is up */
- fm10k_watchdog_subtask(interface);
- fm10k_check_hang_subtask(interface);
- fm10k_ts_tx_subtask(interface);
- /* release lock on service events to allow scheduling next event */
- fm10k_service_event_complete(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 = FM10K_TXDCTL_ENABLE | (1 << FM10K_TXDCTL_MAX_TIME_SHIFT);
- 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 hardwdare */
- 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);
- /* 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 = FM10K_RXQCTL_ENABLE | FM10K_RXQCTL_PF;
- u32 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 */
- fm10k_write_reg(hw, FM10K_RXQCTL(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_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 hardwdare */
- 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 & (1 << 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 VID */
- 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 */
- 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 & (1 << 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 (interface->flags & FM10K_FLAG_RSS_FIELD_IPV4_UDP)
- mrqc |= FM10K_MRQC_UDP_IPV4;
- if (interface->flags & FM10K_FLAG_RSS_FIELD_IPV6_UDP)
- 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(&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_ITR_ENABLE | FM10K_MBX_INT_DELAY);
- /* service upstream mailbox */
- if (fm10k_mbx_trylock(interface)) {
- mbx->ops.process(hw, mbx);
- fm10k_mbx_unlock(interface);
- }
- hw->mac.get_host_state = 1;
- 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 & (1 << 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)
- interface->flags |= FM10K_FLAG_RESET_REQUESTED;
- /* 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 = 1;
- /* 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_ITR_ENABLE | FM10K_MBX_INT_DELAY);
- return IRQ_HANDLED;
- }
- void fm10k_mbx_free_irq(struct fm10k_intfc *interface)
- {
- struct msix_entry *entry = &interface->msix_entries[FM10K_MBX_VECTOR];
- struct fm10k_hw *hw = &interface->hw;
- int itr_reg;
- /* no mailbox IRQ to free if MSI-X is not enabled */
- if (!interface->msix_entries)
- return;
- /* 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) &&
- memcmp(hw->mac.perm_addr, hw->mac.addr, ETH_ALEN))
- interface->flags |= FM10K_FLAG_RESET_REQUESTED;
- /* VLAN override was changed, or default VLAN changed */
- if ((vlan_override != hw->mac.vlan_override) ||
- (default_vid != hw->mac.default_vid))
- interface->flags |= FM10K_FLAG_RESET_REQUESTED;
- return 0;
- }
- static s32 fm10k_1588_msg_vf(struct fm10k_hw *hw, u32 **results,
- struct fm10k_mbx_info __always_unused *mbx)
- {
- struct fm10k_intfc *interface;
- u64 timestamp;
- s32 err;
- err = fm10k_tlv_attr_get_u64(results[FM10K_1588_MSG_TIMESTAMP],
- ×tamp);
- if (err)
- return err;
- interface = container_of(hw, struct fm10k_intfc, hw);
- fm10k_ts_tx_hwtstamp(interface, 0, timestamp);
- 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_VF_MSG_1588_HANDLER(fm10k_1588_msg_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 = FM10K_INT_MAP_TIMER0 | entry->entry;
- /* 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;
- err = fm10k_msg_lport_map_pf(hw, results, mbx);
- if (err)
- return err;
- interface = container_of(hw, struct fm10k_intfc, hw);
- /* we need to reset if port count was just updated */
- if (dglort_map != hw->mac.dglort_map)
- interface->flags |= FM10K_FLAG_RESET_REQUESTED;
- 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 VID 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)
- interface->flags |= FM10K_FLAG_RESET_REQUESTED;
- hw->mac.default_vid = pvid;
- return 0;
- }
- static s32 fm10k_1588_msg_pf(struct fm10k_hw *hw, u32 **results,
- struct fm10k_mbx_info __always_unused *mbx)
- {
- struct fm10k_swapi_1588_timestamp timestamp;
- struct fm10k_iov_data *iov_data;
- struct fm10k_intfc *interface;
- u16 sglort, vf_idx;
- s32 err;
- err = fm10k_tlv_attr_get_le_struct(
- results[FM10K_PF_ATTR_ID_1588_TIMESTAMP],
- ×tamp, sizeof(timestamp));
- if (err)
- return err;
- interface = container_of(hw, struct fm10k_intfc, hw);
- if (timestamp.dglort) {
- fm10k_ts_tx_hwtstamp(interface, timestamp.dglort,
- le64_to_cpu(timestamp.egress));
- return 0;
- }
- /* either dglort or sglort must be set */
- if (!timestamp.sglort)
- return FM10K_ERR_PARAM;
- /* verify GLORT is at least one of the ones we own */
- sglort = le16_to_cpu(timestamp.sglort);
- if (!fm10k_glort_valid_pf(hw, sglort))
- return FM10K_ERR_PARAM;
- if (sglort == interface->glort) {
- fm10k_ts_tx_hwtstamp(interface, 0,
- le64_to_cpu(timestamp.ingress));
- return 0;
- }
- /* if there is no iov_data then there is no mailboxes to process */
- if (!ACCESS_ONCE(interface->iov_data))
- return FM10K_ERR_PARAM;
- rcu_read_lock();
- /* notify VF if this timestamp belongs to it */
- iov_data = interface->iov_data;
- vf_idx = (hw->mac.dglort_map & FM10K_DGLORTMAP_NONE) - sglort;
- if (!iov_data || vf_idx >= iov_data->num_vfs) {
- err = FM10K_ERR_PARAM;
- goto err_unlock;
- }
- err = hw->iov.ops.report_timestamp(hw, &iov_data->vf_info[vf_idx],
- le64_to_cpu(timestamp.ingress));
- err_unlock:
- rcu_read_unlock();
- return err;
- }
- 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_PF_MSG_1588_TIMESTAMP_HANDLER(fm10k_1588_msg_pf),
- 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 = FM10K_INT_MAP_TIMER0 | entry->entry;
- u32 other_itr = FM10K_INT_MAP_IMMEDIATE | entry->entry;
- /* 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_PCIeFault), other_itr);
- fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_SwitchUpDown), other_itr);
- fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_SRAM), other_itr);
- fm10k_write_reg(hw, FM10K_INT_MAP(fm10k_int_MaxHoldTime), 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;
- /* 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;
- 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) - 1,
- "%s-TxRx-%d", dev->name, ri++);
- ti++;
- } else if (q_vector->rx.count) {
- snprintf(q_vector->name, sizeof(q_vector->name) - 1,
- "%s-rx-%d", dev->name, ri++);
- } else if (q_vector->tx.count) {
- snprintf(q_vector->name, sizeof(q_vector->name) - 1,
- "%s-tx-%d", 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;
- }
- /* 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;
- /* 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);
- /* 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 = 1;
- 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;
- /* signal that we are down to the interrupt handler and service task */
- set_bit(__FM10K_DOWN, &interface->state);
- /* 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);
- /* allow 10ms for device to quiesce */
- usleep_range(10000, 20000);
- /* disable polling routines */
- fm10k_napi_disable_all(interface);
- /* capture stats one last time before stopping interface */
- fm10k_update_stats(interface);
- /* Disable DMA engine for Tx/Rx */
- hw->mac.ops.stop_hw(hw);
- /* 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;
- }
- /* delay any future reset requests */
- interface->last_reset = jiffies + (10 * HZ);
- /* 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;
- }
- memcpy(netdev->dev_addr, hw->mac.addr, netdev->addr_len);
- memcpy(netdev->perm_addr, hw->mac.addr, netdev->addr_len);
- if (!is_valid_ether_addr(netdev->perm_addr)) {
- dev_err(&pdev->dev, "Invalid MAC Address\n");
- return -EIO;
- }
- /* assign BAR 4 resources for use with PTP */
- if (fm10k_read_reg(hw, FM10K_CTRL) & FM10K_CTRL_BAR4_ALLOWED)
- interface->sw_addr = ioremap(pci_resource_start(pdev, 4),
- pci_resource_len(pdev, 4));
- hw->sw_addr = interface->sw_addr;
- /* Only the PF can support VXLAN and NVGRE offloads */
- if (hw->mac.type != fm10k_mac_pf) {
- netdev->hw_enc_features = 0;
- netdev->features &= ~NETIF_F_GSO_UDP_TUNNEL;
- netdev->hw_features &= ~NETIF_F_GSO_UDP_TUNNEL;
- }
- /* initialize DCBNL interface */
- fm10k_dcbnl_set_ops(netdev);
- /* Initialize service timer and service task */
- set_bit(__FM10K_SERVICE_DISABLE, &interface->state);
- setup_timer(&interface->service_timer, &fm10k_service_timer,
- (unsigned long)interface);
- INIT_WORK(&interface->service_task, fm10k_service_task);
- /* kick off service timer now, even when interface is down */
- mod_timer(&interface->service_timer, (HZ * 2) + jiffies);
- /* Intitialize timestamp data */
- fm10k_ts_init(interface);
- /* 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_ITR_10K;
- interface->rx_itr = FM10K_ITR_ADAPTIVE | FM10K_ITR_20K;
- /* initialize vxlan_port list */
- INIT_LIST_HEAD(&interface->vxlan_port);
- netdev_rss_key_fill(rss_key, sizeof(rss_key));
- memcpy(interface->rssrk, rss_key, sizeof(rss_key));
- /* Start off interface as being down */
- set_bit(__FM10K_DOWN, &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) {
- 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;
- err = pci_enable_device_mem(pdev);
- if (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_selected_regions(pdev,
- pci_select_bars(pdev,
- IORESOURCE_MEM),
- 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();
- 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;
- 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);
- /* Register PTP interface */
- fm10k_ptp_register(interface);
- /* 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 to allow service task to start */
- clear_bit(__FM10K_SERVICE_DISABLE, &interface->state);
- 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_selected_regions(pdev,
- pci_select_bars(pdev, IORESOURCE_MEM));
- 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);
- set_bit(__FM10K_SERVICE_DISABLE, &interface->state);
- cancel_work_sync(&interface->service_task);
- /* free netdev, this may bounce the interrupts due to setup_tc */
- if (netdev->reg_state == NETREG_REGISTERED)
- unregister_netdev(netdev);
- /* cleanup timestamp handling */
- fm10k_ptp_unregister(interface);
- /* 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_selected_regions(pdev,
- pci_select_bars(pdev, IORESOURCE_MEM));
- pci_disable_pcie_error_reporting(pdev);
- pci_disable_device(pdev);
- }
- #ifdef CONFIG_PM
- /**
- * fm10k_resume - Restore device to pre-sleep state
- * @pdev: PCI device information struct
- *
- * fm10k_resume is called after the system has powered back up from a sleep
- * state and is ready to resume operation. This function is meant to restore
- * the device back to its pre-sleep state.
- **/
- static int fm10k_resume(struct pci_dev *pdev)
- {
- struct fm10k_intfc *interface = pci_get_drvdata(pdev);
- struct net_device *netdev = interface->netdev;
- struct fm10k_hw *hw = &interface->hw;
- u32 err;
- pci_set_power_state(pdev, PCI_D0);
- pci_restore_state(pdev);
- /* pci_restore_state clears dev->state_saved so call
- * pci_save_state to restore it.
- */
- pci_save_state(pdev);
- err = pci_enable_device_mem(pdev);
- if (err) {
- dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n");
- return err;
- }
- pci_set_master(pdev);
- pci_wake_from_d3(pdev, false);
- /* refresh hw_addr in case it was dropped */
- hw->hw_addr = interface->uc_addr;
- /* reset hardware to known state */
- err = hw->mac.ops.init_hw(&interface->hw);
- if (err) {
- dev_err(&pdev->dev, "init_hw failed: %d\n", err);
- return err;
- }
- /* reset statistics starting values */
- hw->mac.ops.rebind_hw_stats(hw, &interface->stats);
- /* reset clock */
- fm10k_ts_reset(interface);
- rtnl_lock();
- err = fm10k_init_queueing_scheme(interface);
- if (!err) {
- fm10k_mbx_request_irq(interface);
- if (netif_running(netdev))
- err = fm10k_open(netdev);
- }
- rtnl_unlock();
- 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);
- /* clear the service task disable bit to allow service task to start */
- clear_bit(__FM10K_SERVICE_DISABLE, &interface->state);
- fm10k_service_event_schedule(interface);
- /* restore SR-IOV interface */
- fm10k_iov_resume(pdev);
- netif_device_attach(netdev);
- return 0;
- }
- /**
- * fm10k_suspend - Prepare the device for a system sleep state
- * @pdev: PCI device information struct
- *
- * fm10k_suspend is meant to shutdown the device prior to the system entering
- * a sleep state. The fm10k hardware does not support wake on lan so the
- * driver simply needs to shut down the device so it is in a low power state.
- **/
- static int fm10k_suspend(struct pci_dev *pdev,
- pm_message_t __always_unused state)
- {
- struct fm10k_intfc *interface = pci_get_drvdata(pdev);
- struct net_device *netdev = interface->netdev;
- int err = 0;
- netif_device_detach(netdev);
- fm10k_iov_suspend(pdev);
- /* the watchdog tasks may read registers, which will appear like a
- * surprise-remove event once the PCI device is disabled. This will
- * cause us to close the netdevice, so we don't retain the open/closed
- * state post-resume. Prevent this by disabling the service task while
- * suspended, until we actually resume.
- */
- set_bit(__FM10K_SERVICE_DISABLE, &interface->state);
- cancel_work_sync(&interface->service_task);
- rtnl_lock();
- if (netif_running(netdev))
- fm10k_close(netdev);
- fm10k_mbx_free_irq(interface);
- fm10k_clear_queueing_scheme(interface);
- rtnl_unlock();
- err = pci_save_state(pdev);
- if (err)
- return err;
- pci_disable_device(pdev);
- pci_wake_from_d3(pdev, false);
- pci_set_power_state(pdev, PCI_D3hot);
- return 0;
- }
- #endif /* CONFIG_PM */
- /**
- * 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;
- if (netif_running(netdev))
- fm10k_close(netdev);
- /* free interrupts */
- fm10k_clear_queueing_scheme(interface);
- fm10k_mbx_free_irq(interface);
- pci_disable_device(pdev);
- /* 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)
- {
- struct fm10k_intfc *interface = pci_get_drvdata(pdev);
- pci_ers_result_t result;
- if (pci_enable_device_mem(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);
- /* refresh hw_addr in case it was dropped */
- interface->hw.hw_addr = interface->uc_addr;
- interface->flags |= FM10K_FLAG_RESET_REQUESTED;
- fm10k_service_event_schedule(interface);
- 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;
- struct fm10k_hw *hw = &interface->hw;
- int err = 0;
- /* reset hardware to known state */
- err = hw->mac.ops.init_hw(&interface->hw);
- if (err) {
- dev_err(&pdev->dev, "init_hw failed: %d\n", err);
- return;
- }
- /* reset statistics starting values */
- hw->mac.ops.rebind_hw_stats(hw, &interface->stats);
- err = fm10k_init_queueing_scheme(interface);
- if (err) {
- dev_err(&interface->pdev->dev, "init_queueing_scheme failed: %d\n", err);
- return;
- }
- /* reassociate interrupts */
- fm10k_mbx_request_irq(interface);
- /* reset clock */
- fm10k_ts_reset(interface);
- if (netif_running(netdev))
- err = fm10k_open(netdev);
- /* final check of hardware state before registering the interface */
- err = err ? : fm10k_hw_ready(interface);
- if (!err)
- netif_device_attach(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,
- };
- static struct pci_driver fm10k_driver = {
- .name = fm10k_driver_name,
- .id_table = fm10k_pci_tbl,
- .probe = fm10k_probe,
- .remove = fm10k_remove,
- #ifdef CONFIG_PM
- .suspend = fm10k_suspend,
- .resume = fm10k_resume,
- #endif
- .sriov_configure = fm10k_iov_configure,
- .err_handler = &fm10k_err_handler
- };
- /**
- * fm10k_register_pci_driver - register driver interface
- *
- * This funciton 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 funciton is called on module unload in order to remove the driver.
- **/
- void fm10k_unregister_pci_driver(void)
- {
- pci_unregister_driver(&fm10k_driver);
- }
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