diff options
Diffstat (limited to 'drivers/net/ethernet/intel/igc/igc_main.c')
| -rw-r--r-- | drivers/net/ethernet/intel/igc/igc_main.c | 253 |
1 files changed, 229 insertions, 24 deletions
diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c index 9700527dd797..25989c087aca 100644 --- a/drivers/net/ethernet/intel/igc/igc_main.c +++ b/drivers/net/ethernet/intel/igc/igc_main.c @@ -8,6 +8,7 @@ #include <linux/tcp.h> #include <linux/udp.h> #include <linux/ip.h> +#include <linux/pm_runtime.h> #include <net/ipv6.h> @@ -114,7 +115,7 @@ void igc_reset(struct igc_adapter *adapter) } /** - * igc_power_up_link - Power up the phy/serdes link + * igc_power_up_link - Power up the phy link * @adapter: address of board private structure */ static void igc_power_up_link(struct igc_adapter *adapter) @@ -128,7 +129,7 @@ static void igc_power_up_link(struct igc_adapter *adapter) } /** - * igc_power_down_link - Power down the phy/serdes link + * igc_power_down_link - Power down the phy link * @adapter: address of board private structure */ static void igc_power_down_link(struct igc_adapter *adapter) @@ -1485,7 +1486,6 @@ static bool igc_can_reuse_rx_page(struct igc_rx_buffer *rx_buffer) * igc_is_non_eop - process handling of non-EOP buffers * @rx_ring: Rx ring being processed * @rx_desc: Rx descriptor for current buffer - * @skb: current socket buffer containing buffer in progress * * This function updates next to clean. If the buffer is an EOP buffer * this function exits returning false, otherwise it will place the @@ -1567,7 +1567,8 @@ static void igc_put_rx_buffer(struct igc_ring *rx_ring, /** * igc_alloc_rx_buffers - Replace used receive buffers; packet split - * @adapter: address of board private structure + * @rx_ring: rx descriptor ring + * @cleaned_count: number of buffers to clean */ static void igc_alloc_rx_buffers(struct igc_ring *rx_ring, u16 cleaned_count) { @@ -3109,7 +3110,7 @@ bool igc_has_link(struct igc_adapter *adapter) /** * igc_watchdog - Timer Call-back - * @data: pointer to adapter cast into an unsigned long + * @t: timer for the watchdog */ static void igc_watchdog(struct timer_list *t) { @@ -3638,6 +3639,7 @@ static int igc_poll(struct napi_struct *napi, int budget) /** * igc_set_interrupt_capability - set MSI or MSI-X if supported * @adapter: Pointer to adapter structure + * @msix: boolean value for MSI-X capability * * Attempt to configure interrupts using the best available * capabilities of the hardware and kernel. @@ -3906,6 +3908,7 @@ static void igc_cache_ring_register(struct igc_adapter *adapter) /** * igc_init_interrupt_scheme - initialize interrupts, allocate queues/vectors * @adapter: Pointer to adapter structure + * @msix: boolean for MSI-X capability * * This function initializes the interrupts and allocates all of the queues. */ @@ -4073,8 +4076,9 @@ static void igc_write_itr(struct igc_q_vector *q_vector) } /** - * igc_open - Called when a network interface is made active + * __igc_open - Called when a network interface is made active * @netdev: network interface device structure + * @resuming: boolean indicating if the device is resuming * * Returns 0 on success, negative value on failure * @@ -4164,8 +4168,9 @@ static int igc_open(struct net_device *netdev) } /** - * igc_close - Disables a network interface + * __igc_close - Disables a network interface * @netdev: network interface device structure + * @suspending: boolean indicating the device is suspending * * Returns 0, this is not allowed to fail * @@ -4345,32 +4350,26 @@ static int igc_probe(struct pci_dev *pdev, struct net_device *netdev; struct igc_hw *hw; const struct igc_info *ei = igc_info_tbl[ent->driver_data]; - int err; + int err, pci_using_dac; err = pci_enable_device_mem(pdev); if (err) return err; - err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)); + pci_using_dac = 0; + err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); if (!err) { - err = dma_set_coherent_mask(&pdev->dev, - DMA_BIT_MASK(64)); + pci_using_dac = 1; } else { - err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); + err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); if (err) { - err = dma_set_coherent_mask(&pdev->dev, - DMA_BIT_MASK(32)); - if (err) { - dev_err(&pdev->dev, "igc: Wrong DMA config\n"); - goto err_dma; - } + dev_err(&pdev->dev, + "No usable DMA configuration, aborting\n"); + goto err_dma; } } - err = pci_request_selected_regions(pdev, - pci_select_bars(pdev, - IORESOURCE_MEM), - igc_driver_name); + err = pci_request_mem_regions(pdev, igc_driver_name); if (err) goto err_pci_reg; @@ -4433,6 +4432,7 @@ static int igc_probe(struct pci_dev *pdev, goto err_sw_init; /* Add supported features to the features list*/ + netdev->features |= NETIF_F_SG; netdev->features |= NETIF_F_RXCSUM; netdev->features |= NETIF_F_HW_CSUM; netdev->features |= NETIF_F_SCTP_CRC; @@ -4446,6 +4446,9 @@ static int igc_probe(struct pci_dev *pdev, netdev->hw_features |= NETIF_F_NTUPLE; netdev->hw_features |= netdev->features; + if (pci_using_dac) + netdev->features |= NETIF_F_HIGHDMA; + /* MTU range: 68 - 9216 */ netdev->min_mtu = ETH_MIN_MTU; netdev->max_mtu = MAX_STD_JUMBO_FRAME_SIZE; @@ -4532,8 +4535,7 @@ err_sw_init: err_ioremap: free_netdev(netdev); err_alloc_etherdev: - pci_release_selected_regions(pdev, - pci_select_bars(pdev, IORESOURCE_MEM)); + pci_release_mem_regions(pdev); err_pci_reg: err_dma: pci_disable_device(pdev); @@ -4580,11 +4582,214 @@ static void igc_remove(struct pci_dev *pdev) pci_disable_device(pdev); } +static int __igc_shutdown(struct pci_dev *pdev, bool *enable_wake, + bool runtime) +{ + struct net_device *netdev = pci_get_drvdata(pdev); + struct igc_adapter *adapter = netdev_priv(netdev); + u32 wufc = runtime ? IGC_WUFC_LNKC : adapter->wol; + struct igc_hw *hw = &adapter->hw; + u32 ctrl, rctl, status; + bool wake; + + rtnl_lock(); + netif_device_detach(netdev); + + if (netif_running(netdev)) + __igc_close(netdev, true); + + igc_clear_interrupt_scheme(adapter); + rtnl_unlock(); + + status = rd32(IGC_STATUS); + if (status & IGC_STATUS_LU) + wufc &= ~IGC_WUFC_LNKC; + + if (wufc) { + igc_setup_rctl(adapter); + igc_set_rx_mode(netdev); + + /* turn on all-multi mode if wake on multicast is enabled */ + if (wufc & IGC_WUFC_MC) { + rctl = rd32(IGC_RCTL); + rctl |= IGC_RCTL_MPE; + wr32(IGC_RCTL, rctl); + } + + ctrl = rd32(IGC_CTRL); + ctrl |= IGC_CTRL_ADVD3WUC; + wr32(IGC_CTRL, ctrl); + + /* Allow time for pending master requests to run */ + igc_disable_pcie_master(hw); + + wr32(IGC_WUC, IGC_WUC_PME_EN); + wr32(IGC_WUFC, wufc); + } else { + wr32(IGC_WUC, 0); + wr32(IGC_WUFC, 0); + } + + wake = wufc || adapter->en_mng_pt; + if (!wake) + igc_power_down_link(adapter); + else + igc_power_up_link(adapter); + + if (enable_wake) + *enable_wake = wake; + + /* Release control of h/w to f/w. If f/w is AMT enabled, this + * would have already happened in close and is redundant. + */ + igc_release_hw_control(adapter); + + pci_disable_device(pdev); + + return 0; +} + +#ifdef CONFIG_PM +static int __maybe_unused igc_runtime_suspend(struct device *dev) +{ + return __igc_shutdown(to_pci_dev(dev), NULL, 1); +} + +static void igc_deliver_wake_packet(struct net_device *netdev) +{ + struct igc_adapter *adapter = netdev_priv(netdev); + struct igc_hw *hw = &adapter->hw; + struct sk_buff *skb; + u32 wupl; + + wupl = rd32(IGC_WUPL) & IGC_WUPL_MASK; + + /* WUPM stores only the first 128 bytes of the wake packet. + * Read the packet only if we have the whole thing. + */ + if (wupl == 0 || wupl > IGC_WUPM_BYTES) + return; + + skb = netdev_alloc_skb_ip_align(netdev, IGC_WUPM_BYTES); + if (!skb) + return; + + skb_put(skb, wupl); + + /* Ensure reads are 32-bit aligned */ + wupl = roundup(wupl, 4); + + memcpy_fromio(skb->data, hw->hw_addr + IGC_WUPM_REG(0), wupl); + + skb->protocol = eth_type_trans(skb, netdev); + netif_rx(skb); +} + +static int __maybe_unused igc_resume(struct device *dev) +{ + struct pci_dev *pdev = to_pci_dev(dev); + struct net_device *netdev = pci_get_drvdata(pdev); + struct igc_adapter *adapter = netdev_priv(netdev); + struct igc_hw *hw = &adapter->hw; + u32 err, val; + + pci_set_power_state(pdev, PCI_D0); + pci_restore_state(pdev); + pci_save_state(pdev); + + if (!pci_device_is_present(pdev)) + return -ENODEV; + err = pci_enable_device_mem(pdev); + if (err) { + dev_err(&pdev->dev, + "igc: Cannot enable PCI device from suspend\n"); + return err; + } + pci_set_master(pdev); + + pci_enable_wake(pdev, PCI_D3hot, 0); + pci_enable_wake(pdev, PCI_D3cold, 0); + + if (igc_init_interrupt_scheme(adapter, true)) { + dev_err(&pdev->dev, "Unable to allocate memory for queues\n"); + return -ENOMEM; + } + + igc_reset(adapter); + + /* let the f/w know that the h/w is now under the control of the + * driver. + */ + igc_get_hw_control(adapter); + + val = rd32(IGC_WUS); + if (val & WAKE_PKT_WUS) + igc_deliver_wake_packet(netdev); + + wr32(IGC_WUS, ~0); + + rtnl_lock(); + if (!err && netif_running(netdev)) + err = __igc_open(netdev, true); + + if (!err) + netif_device_attach(netdev); + rtnl_unlock(); + + return err; +} + +static int __maybe_unused igc_runtime_resume(struct device *dev) +{ + return igc_resume(dev); +} + +static int __maybe_unused igc_suspend(struct device *dev) +{ + return __igc_shutdown(to_pci_dev(dev), NULL, 0); +} + +static int __maybe_unused igc_runtime_idle(struct device *dev) +{ + struct net_device *netdev = dev_get_drvdata(dev); + struct igc_adapter *adapter = netdev_priv(netdev); + + if (!igc_has_link(adapter)) + pm_schedule_suspend(dev, MSEC_PER_SEC * 5); + + return -EBUSY; +} +#endif /* CONFIG_PM */ + +static void igc_shutdown(struct pci_dev *pdev) +{ + bool wake; + + __igc_shutdown(pdev, &wake, 0); + + if (system_state == SYSTEM_POWER_OFF) { + pci_wake_from_d3(pdev, wake); + pci_set_power_state(pdev, PCI_D3hot); + } +} + +#ifdef CONFIG_PM +static const struct dev_pm_ops igc_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(igc_suspend, igc_resume) + SET_RUNTIME_PM_OPS(igc_runtime_suspend, igc_runtime_resume, + igc_runtime_idle) +}; +#endif + static struct pci_driver igc_driver = { .name = igc_driver_name, .id_table = igc_pci_tbl, .probe = igc_probe, .remove = igc_remove, +#ifdef CONFIG_PM + .driver.pm = &igc_pm_ops, +#endif + .shutdown = igc_shutdown, }; void igc_set_flag_queue_pairs(struct igc_adapter *adapter, |