diff options
Diffstat (limited to 'drivers/net/ethernet/intel/fm10k/fm10k_netdev.c')
| -rw-r--r-- | drivers/net/ethernet/intel/fm10k/fm10k_netdev.c | 1435 |
1 files changed, 1435 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c b/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c new file mode 100644 index 000000000000..bf44a8fe711f --- /dev/null +++ b/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c @@ -0,0 +1,1435 @@ +/* Intel Ethernet Switch Host Interface Driver + * Copyright(c) 2013 - 2014 Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * The full GNU General Public License is included in this distribution in + * the file called "COPYING". + * + * Contact Information: + * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> + * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 + */ + +#include "fm10k.h" +#include <linux/vmalloc.h> +#if IS_ENABLED(CONFIG_VXLAN) +#include <net/vxlan.h> +#endif /* CONFIG_VXLAN */ + +/** + * fm10k_setup_tx_resources - allocate Tx resources (Descriptors) + * @tx_ring: tx descriptor ring (for a specific queue) to setup + * + * Return 0 on success, negative on failure + **/ +int fm10k_setup_tx_resources(struct fm10k_ring *tx_ring) +{ + struct device *dev = tx_ring->dev; + int size; + + size = sizeof(struct fm10k_tx_buffer) * tx_ring->count; + + tx_ring->tx_buffer = vzalloc(size); + if (!tx_ring->tx_buffer) + goto err; + + u64_stats_init(&tx_ring->syncp); + + /* round up to nearest 4K */ + tx_ring->size = tx_ring->count * sizeof(struct fm10k_tx_desc); + tx_ring->size = ALIGN(tx_ring->size, 4096); + + tx_ring->desc = dma_alloc_coherent(dev, tx_ring->size, + &tx_ring->dma, GFP_KERNEL); + if (!tx_ring->desc) + goto err; + + return 0; + +err: + vfree(tx_ring->tx_buffer); + tx_ring->tx_buffer = NULL; + return -ENOMEM; +} + +/** + * fm10k_setup_all_tx_resources - allocate all queues Tx resources + * @interface: board private structure + * + * If this function returns with an error, then it's possible one or + * more of the rings is populated (while the rest are not). It is the + * callers duty to clean those orphaned rings. + * + * Return 0 on success, negative on failure + **/ +static int fm10k_setup_all_tx_resources(struct fm10k_intfc *interface) +{ + int i, err = 0; + + for (i = 0; i < interface->num_tx_queues; i++) { + err = fm10k_setup_tx_resources(interface->tx_ring[i]); + if (!err) + continue; + + netif_err(interface, probe, interface->netdev, + "Allocation for Tx Queue %u failed\n", i); + goto err_setup_tx; + } + + return 0; +err_setup_tx: + /* rewind the index freeing the rings as we go */ + while (i--) + fm10k_free_tx_resources(interface->tx_ring[i]); + return err; +} + +/** + * fm10k_setup_rx_resources - allocate Rx resources (Descriptors) + * @rx_ring: rx descriptor ring (for a specific queue) to setup + * + * Returns 0 on success, negative on failure + **/ +int fm10k_setup_rx_resources(struct fm10k_ring *rx_ring) +{ + struct device *dev = rx_ring->dev; + int size; + + size = sizeof(struct fm10k_rx_buffer) * rx_ring->count; + + rx_ring->rx_buffer = vzalloc(size); + if (!rx_ring->rx_buffer) + goto err; + + u64_stats_init(&rx_ring->syncp); + + /* Round up to nearest 4K */ + rx_ring->size = rx_ring->count * sizeof(union fm10k_rx_desc); + rx_ring->size = ALIGN(rx_ring->size, 4096); + + rx_ring->desc = dma_alloc_coherent(dev, rx_ring->size, + &rx_ring->dma, GFP_KERNEL); + if (!rx_ring->desc) + goto err; + + return 0; +err: + vfree(rx_ring->rx_buffer); + rx_ring->rx_buffer = NULL; + return -ENOMEM; +} + +/** + * fm10k_setup_all_rx_resources - allocate all queues Rx resources + * @interface: board private structure + * + * If this function returns with an error, then it's possible one or + * more of the rings is populated (while the rest are not). It is the + * callers duty to clean those orphaned rings. + * + * Return 0 on success, negative on failure + **/ +static int fm10k_setup_all_rx_resources(struct fm10k_intfc *interface) +{ + int i, err = 0; + + for (i = 0; i < interface->num_rx_queues; i++) { + err = fm10k_setup_rx_resources(interface->rx_ring[i]); + if (!err) + continue; + + netif_err(interface, probe, interface->netdev, + "Allocation for Rx Queue %u failed\n", i); + goto err_setup_rx; + } + + return 0; +err_setup_rx: + /* rewind the index freeing the rings as we go */ + while (i--) + fm10k_free_rx_resources(interface->rx_ring[i]); + return err; +} + +void fm10k_unmap_and_free_tx_resource(struct fm10k_ring *ring, + struct fm10k_tx_buffer *tx_buffer) +{ + if (tx_buffer->skb) { + dev_kfree_skb_any(tx_buffer->skb); + if (dma_unmap_len(tx_buffer, len)) + dma_unmap_single(ring->dev, + dma_unmap_addr(tx_buffer, dma), + dma_unmap_len(tx_buffer, len), + DMA_TO_DEVICE); + } else if (dma_unmap_len(tx_buffer, len)) { + dma_unmap_page(ring->dev, + dma_unmap_addr(tx_buffer, dma), + dma_unmap_len(tx_buffer, len), + DMA_TO_DEVICE); + } + tx_buffer->next_to_watch = NULL; + tx_buffer->skb = NULL; + dma_unmap_len_set(tx_buffer, len, 0); + /* tx_buffer must be completely set up in the transmit path */ +} + +/** + * fm10k_clean_tx_ring - Free Tx Buffers + * @tx_ring: ring to be cleaned + **/ +static void fm10k_clean_tx_ring(struct fm10k_ring *tx_ring) +{ + struct fm10k_tx_buffer *tx_buffer; + unsigned long size; + u16 i; + + /* ring already cleared, nothing to do */ + if (!tx_ring->tx_buffer) + return; + + /* Free all the Tx ring sk_buffs */ + for (i = 0; i < tx_ring->count; i++) { + tx_buffer = &tx_ring->tx_buffer[i]; + fm10k_unmap_and_free_tx_resource(tx_ring, tx_buffer); + } + + /* reset BQL values */ + netdev_tx_reset_queue(txring_txq(tx_ring)); + + size = sizeof(struct fm10k_tx_buffer) * tx_ring->count; + memset(tx_ring->tx_buffer, 0, size); + + /* Zero out the descriptor ring */ + memset(tx_ring->desc, 0, tx_ring->size); +} + +/** + * fm10k_free_tx_resources - Free Tx Resources per Queue + * @tx_ring: Tx descriptor ring for a specific queue + * + * Free all transmit software resources + **/ +void fm10k_free_tx_resources(struct fm10k_ring *tx_ring) +{ + fm10k_clean_tx_ring(tx_ring); + + vfree(tx_ring->tx_buffer); + tx_ring->tx_buffer = NULL; + + /* if not set, then don't free */ + if (!tx_ring->desc) + return; + + dma_free_coherent(tx_ring->dev, tx_ring->size, + tx_ring->desc, tx_ring->dma); + tx_ring->desc = NULL; +} + +/** + * fm10k_clean_all_tx_rings - Free Tx Buffers for all queues + * @interface: board private structure + **/ +void fm10k_clean_all_tx_rings(struct fm10k_intfc *interface) +{ + int i; + + for (i = 0; i < interface->num_tx_queues; i++) + fm10k_clean_tx_ring(interface->tx_ring[i]); + + /* remove any stale timestamp buffers and free them */ + skb_queue_purge(&interface->ts_tx_skb_queue); +} + +/** + * fm10k_free_all_tx_resources - Free Tx Resources for All Queues + * @interface: board private structure + * + * Free all transmit software resources + **/ +static void fm10k_free_all_tx_resources(struct fm10k_intfc *interface) +{ + int i = interface->num_tx_queues; + + while (i--) + fm10k_free_tx_resources(interface->tx_ring[i]); +} + +/** + * fm10k_clean_rx_ring - Free Rx Buffers per Queue + * @rx_ring: ring to free buffers from + **/ +static void fm10k_clean_rx_ring(struct fm10k_ring *rx_ring) +{ + unsigned long size; + u16 i; + + if (!rx_ring->rx_buffer) + return; + + if (rx_ring->skb) + dev_kfree_skb(rx_ring->skb); + rx_ring->skb = NULL; + + /* Free all the Rx ring sk_buffs */ + for (i = 0; i < rx_ring->count; i++) { + struct fm10k_rx_buffer *buffer = &rx_ring->rx_buffer[i]; + /* clean-up will only set page pointer to NULL */ + if (!buffer->page) + continue; + + dma_unmap_page(rx_ring->dev, buffer->dma, + PAGE_SIZE, DMA_FROM_DEVICE); + __free_page(buffer->page); + + buffer->page = NULL; + } + + size = sizeof(struct fm10k_rx_buffer) * rx_ring->count; + memset(rx_ring->rx_buffer, 0, size); + + /* Zero out the descriptor ring */ + memset(rx_ring->desc, 0, rx_ring->size); + + rx_ring->next_to_alloc = 0; + rx_ring->next_to_clean = 0; + rx_ring->next_to_use = 0; +} + +/** + * fm10k_free_rx_resources - Free Rx Resources + * @rx_ring: ring to clean the resources from + * + * Free all receive software resources + **/ +void fm10k_free_rx_resources(struct fm10k_ring *rx_ring) +{ + fm10k_clean_rx_ring(rx_ring); + + vfree(rx_ring->rx_buffer); + rx_ring->rx_buffer = NULL; + + /* if not set, then don't free */ + if (!rx_ring->desc) + return; + + dma_free_coherent(rx_ring->dev, rx_ring->size, + rx_ring->desc, rx_ring->dma); + + rx_ring->desc = NULL; +} + +/** + * fm10k_clean_all_rx_rings - Free Rx Buffers for all queues + * @interface: board private structure + **/ +void fm10k_clean_all_rx_rings(struct fm10k_intfc *interface) +{ + int i; + + for (i = 0; i < interface->num_rx_queues; i++) + fm10k_clean_rx_ring(interface->rx_ring[i]); +} + +/** + * fm10k_free_all_rx_resources - Free Rx Resources for All Queues + * @interface: board private structure + * + * Free all receive software resources + **/ +static void fm10k_free_all_rx_resources(struct fm10k_intfc *interface) +{ + int i = interface->num_rx_queues; + + while (i--) + fm10k_free_rx_resources(interface->rx_ring[i]); +} + +/** + * fm10k_request_glort_range - Request GLORTs for use in configuring rules + * @interface: board private structure + * + * This function allocates a range of glorts for this inteface to use. + **/ +static void fm10k_request_glort_range(struct fm10k_intfc *interface) +{ + struct fm10k_hw *hw = &interface->hw; + u16 mask = (~hw->mac.dglort_map) >> FM10K_DGLORTMAP_MASK_SHIFT; + + /* establish GLORT base */ + interface->glort = hw->mac.dglort_map & FM10K_DGLORTMAP_NONE; + interface->glort_count = 0; + + /* nothing we can do until mask is allocated */ + if (hw->mac.dglort_map == FM10K_DGLORTMAP_NONE) + return; + + /* we support 3 possible GLORT configurations. + * 1: VFs consume all but the last 1 + * 2: VFs and PF split glorts with possible gap between + * 3: VFs allocated first 64, all others belong to PF + */ + if (mask <= hw->iov.total_vfs) { + interface->glort_count = 1; + interface->glort += mask; + } else if (mask < 64) { + interface->glort_count = (mask + 1) / 2; + interface->glort += interface->glort_count; + } else { + interface->glort_count = mask - 63; + interface->glort += 64; + } +} + +/** + * fm10k_del_vxlan_port_all + * @interface: board private structure + * + * This function frees the entire vxlan_port list + **/ +static void fm10k_del_vxlan_port_all(struct fm10k_intfc *interface) +{ + struct fm10k_vxlan_port *vxlan_port; + + /* flush all entries from list */ + vxlan_port = list_first_entry_or_null(&interface->vxlan_port, + struct fm10k_vxlan_port, list); + while (vxlan_port) { + list_del(&vxlan_port->list); + kfree(vxlan_port); + vxlan_port = list_first_entry_or_null(&interface->vxlan_port, + struct fm10k_vxlan_port, + list); + } +} + +/** + * fm10k_restore_vxlan_port + * @interface: board private structure + * + * This function restores the value in the tunnel_cfg register after reset + **/ +static void fm10k_restore_vxlan_port(struct fm10k_intfc *interface) +{ + struct fm10k_hw *hw = &interface->hw; + struct fm10k_vxlan_port *vxlan_port; + + /* only the PF supports configuring tunnels */ + if (hw->mac.type != fm10k_mac_pf) + return; + + vxlan_port = list_first_entry_or_null(&interface->vxlan_port, + struct fm10k_vxlan_port, list); + + /* restore tunnel configuration register */ + fm10k_write_reg(hw, FM10K_TUNNEL_CFG, + (vxlan_port ? ntohs(vxlan_port->port) : 0) | + (ETH_P_TEB << FM10K_TUNNEL_CFG_NVGRE_SHIFT)); +} + +/** + * fm10k_add_vxlan_port + * @netdev: network interface device structure + * @sa_family: Address family of new port + * @port: port number used for VXLAN + * + * This funciton is called when a new VXLAN interface has added a new port + * number to the range that is currently in use for VXLAN. The new port + * number is always added to the tail so that the port number list should + * match the order in which the ports were allocated. The head of the list + * is always used as the VXLAN port number for offloads. + **/ +static void fm10k_add_vxlan_port(struct net_device *dev, + sa_family_t sa_family, __be16 port) { + struct fm10k_intfc *interface = netdev_priv(dev); + struct fm10k_vxlan_port *vxlan_port; + + /* only the PF supports configuring tunnels */ + if (interface->hw.mac.type != fm10k_mac_pf) + return; + + /* existing ports are pulled out so our new entry is always last */ + fm10k_vxlan_port_for_each(vxlan_port, interface) { + if ((vxlan_port->port == port) && + (vxlan_port->sa_family == sa_family)) { + list_del(&vxlan_port->list); + goto insert_tail; + } + } + + /* allocate memory to track ports */ + vxlan_port = kmalloc(sizeof(*vxlan_port), GFP_ATOMIC); + if (!vxlan_port) + return; + vxlan_port->port = port; + vxlan_port->sa_family = sa_family; + +insert_tail: + /* add new port value to list */ + list_add_tail(&vxlan_port->list, &interface->vxlan_port); + + fm10k_restore_vxlan_port(interface); +} + +/** + * fm10k_del_vxlan_port + * @netdev: network interface device structure + * @sa_family: Address family of freed port + * @port: port number used for VXLAN + * + * This funciton is called when a new VXLAN interface has freed a port + * number from the range that is currently in use for VXLAN. The freed + * port is removed from the list and the new head is used to determine + * the port number for offloads. + **/ +static void fm10k_del_vxlan_port(struct net_device *dev, + sa_family_t sa_family, __be16 port) { + struct fm10k_intfc *interface = netdev_priv(dev); + struct fm10k_vxlan_port *vxlan_port; + + if (interface->hw.mac.type != fm10k_mac_pf) + return; + + /* find the port in the list and free it */ + fm10k_vxlan_port_for_each(vxlan_port, interface) { + if ((vxlan_port->port == port) && + (vxlan_port->sa_family == sa_family)) { + list_del(&vxlan_port->list); + kfree(vxlan_port); + break; + } + } + + fm10k_restore_vxlan_port(interface); +} + +/** + * fm10k_open - Called when a network interface is made active + * @netdev: network interface device structure + * + * Returns 0 on success, negative value on failure + * + * The open entry point is called when a network interface is made + * active by the system (IFF_UP). At this point all resources needed + * for transmit and receive operations are allocated, the interrupt + * handler is registered with the OS, the watchdog timer is started, + * and the stack is notified that the interface is ready. + **/ +int fm10k_open(struct net_device *netdev) +{ + struct fm10k_intfc *interface = netdev_priv(netdev); + int err; + + /* allocate transmit descriptors */ + err = fm10k_setup_all_tx_resources(interface); + if (err) + goto err_setup_tx; + + /* allocate receive descriptors */ + err = fm10k_setup_all_rx_resources(interface); + if (err) + goto err_setup_rx; + + /* allocate interrupt resources */ + err = fm10k_qv_request_irq(interface); + if (err) + goto err_req_irq; + + /* setup GLORT assignment for this port */ + fm10k_request_glort_range(interface); + + /* Notify the stack of the actual queue counts */ + err = netif_set_real_num_tx_queues(netdev, + interface->num_tx_queues); + if (err) + goto err_set_queues; + + err = netif_set_real_num_rx_queues(netdev, + interface->num_rx_queues); + if (err) + goto err_set_queues; + +#if IS_ENABLED(CONFIG_VXLAN) + /* update VXLAN port configuration */ + vxlan_get_rx_port(netdev); + +#endif + fm10k_up(interface); + + return 0; + +err_set_queues: + fm10k_qv_free_irq(interface); +err_req_irq: + fm10k_free_all_rx_resources(interface); +err_setup_rx: + fm10k_free_all_tx_resources(interface); +err_setup_tx: + return err; +} + +/** + * fm10k_close - Disables a network interface + * @netdev: network interface device structure + * + * Returns 0, this is not allowed to fail + * + * The close entry point is called when an interface is de-activated + * by the OS. The hardware is still under the drivers control, but + * needs to be disabled. A global MAC reset is issued to stop the + * hardware, and all transmit and receive resources are freed. + **/ +int fm10k_close(struct net_device *netdev) +{ + struct fm10k_intfc *interface = netdev_priv(netdev); + + fm10k_down(interface); + + fm10k_qv_free_irq(interface); + + fm10k_del_vxlan_port_all(interface); + + fm10k_free_all_tx_resources(interface); + fm10k_free_all_rx_resources(interface); + + return 0; +} + +static netdev_tx_t fm10k_xmit_frame(struct sk_buff *skb, struct net_device *dev) +{ + struct fm10k_intfc *interface = netdev_priv(dev); + unsigned int r_idx = skb->queue_mapping; + int err; + + if ((skb->protocol == htons(ETH_P_8021Q)) && + !vlan_tx_tag_present(skb)) { + /* FM10K only supports hardware tagging, any tags in frame + * are considered 2nd level or "outer" tags + */ + struct vlan_hdr *vhdr; + __be16 proto; + + /* make sure skb is not shared */ + skb = skb_share_check(skb, GFP_ATOMIC); + if (!skb) + return NETDEV_TX_OK; + + /* make sure there is enough room to move the ethernet header */ + if (unlikely(!pskb_may_pull(skb, VLAN_ETH_HLEN))) + return NETDEV_TX_OK; + + /* verify the skb head is not shared */ + err = skb_cow_head(skb, 0); + if (err) + return NETDEV_TX_OK; + + /* locate vlan header */ + vhdr = (struct vlan_hdr *)(skb->data + ETH_HLEN); + + /* pull the 2 key pieces of data out of it */ + __vlan_hwaccel_put_tag(skb, + htons(ETH_P_8021Q), + ntohs(vhdr->h_vlan_TCI)); + proto = vhdr->h_vlan_encapsulated_proto; + skb->protocol = (ntohs(proto) >= 1536) ? proto : + htons(ETH_P_802_2); + + /* squash it by moving the ethernet addresses up 4 bytes */ + memmove(skb->data + VLAN_HLEN, skb->data, 12); + __skb_pull(skb, VLAN_HLEN); + skb_reset_mac_header(skb); + } + + /* The minimum packet size for a single buffer is 17B so pad the skb + * in order to meet this minimum size requirement. + */ + if (unlikely(skb->len < 17)) { + int pad_len = 17 - skb->len; + + if (skb_pad(skb, pad_len)) + return NETDEV_TX_OK; + __skb_put(skb, pad_len); + } + + /* prepare packet for hardware time stamping */ + if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) + fm10k_ts_tx_enqueue(interface, skb); + + if (r_idx >= interface->num_tx_queues) + r_idx %= interface->num_tx_queues; + + err = fm10k_xmit_frame_ring(skb, interface->tx_ring[r_idx]); + + return err; +} + +static int fm10k_change_mtu(struct net_device *dev, int new_mtu) +{ + if (new_mtu < 68 || new_mtu > FM10K_MAX_JUMBO_FRAME_SIZE) + return -EINVAL; + + dev->mtu = new_mtu; + + return 0; +} + +/** + * fm10k_tx_timeout - Respond to a Tx Hang + * @netdev: network interface device structure + **/ +static void fm10k_tx_timeout(struct net_device *netdev) +{ + struct fm10k_intfc *interface = netdev_priv(netdev); + bool real_tx_hang = false; + int i; + +#define TX_TIMEO_LIMIT 16000 + for (i = 0; i < interface->num_tx_queues; i++) { + struct fm10k_ring *tx_ring = interface->tx_ring[i]; + + if (check_for_tx_hang(tx_ring) && fm10k_check_tx_hang(tx_ring)) + real_tx_hang = true; + } + + if (real_tx_hang) { + fm10k_tx_timeout_reset(interface); + } else { + netif_info(interface, drv, netdev, + "Fake Tx hang detected with timeout of %d seconds\n", + netdev->watchdog_timeo/HZ); + + /* fake Tx hang - increase the kernel timeout */ + if (netdev->watchdog_timeo < TX_TIMEO_LIMIT) + netdev->watchdog_timeo *= 2; + } +} + +static int fm10k_uc_vlan_unsync(struct net_device *netdev, + const unsigned char *uc_addr) +{ + struct fm10k_intfc *interface = netdev_priv(netdev); + struct fm10k_hw *hw = &interface->hw; + u16 glort = interface->glort; + u16 vid = interface->vid; + bool set = !!(vid / VLAN_N_VID); + int err; + + /* drop any leading bits on the VLAN ID */ + vid &= VLAN_N_VID - 1; + + err = hw->mac.ops.update_uc_addr(hw, glort, uc_addr, vid, set, 0); + if (err) + return err; + + /* return non-zero value as we are only doing a partial sync/unsync */ + return 1; +} + +static int fm10k_mc_vlan_unsync(struct net_device *netdev, + const unsigned char *mc_addr) +{ + struct fm10k_intfc *interface = netdev_priv(netdev); + struct fm10k_hw *hw = &interface->hw; + u16 glort = interface->glort; + u16 vid = interface->vid; + bool set = !!(vid / VLAN_N_VID); + int err; + + /* drop any leading bits on the VLAN ID */ + vid &= VLAN_N_VID - 1; + + err = hw->mac.ops.update_mc_addr(hw, glort, mc_addr, vid, set); + if (err) + return err; + + /* return non-zero value as we are only doing a partial sync/unsync */ + return 1; +} + +static int fm10k_update_vid(struct net_device *netdev, u16 vid, bool set) +{ + struct fm10k_intfc *interface = netdev_priv(netdev); + struct fm10k_hw *hw = &interface->hw; + s32 err; + + /* updates do not apply to VLAN 0 */ + if (!vid) + return 0; + + if (vid >= VLAN_N_VID) + return -EINVAL; + + /* Verify we have permission to add VLANs */ + if (hw->mac.vlan_override) + return -EACCES; + + /* if default VLAN is already present do nothing */ + if (vid == hw->mac.default_vid) + return -EBUSY; + + /* update active_vlans bitmask */ + set_bit(vid, interface->active_vlans); + if (!set) + clear_bit(vid, interface->active_vlans); + + fm10k_mbx_lock(interface); + + /* only need to update the VLAN if not in promiscous mode */ + if (!(netdev->flags & IFF_PROMISC)) { + err = hw->mac.ops.update_vlan(hw, vid, 0, set); + if (err) + return err; + } + + /* update our base MAC address */ + err = hw->mac.ops.update_uc_addr(hw, interface->glort, hw->mac.addr, + vid, set, 0); + if (err) + return err; + + /* set vid prior to syncing/unsyncing the VLAN */ + interface->vid = vid + (set ? VLAN_N_VID : 0); + + /* Update the unicast and multicast address list to add/drop VLAN */ + __dev_uc_unsync(netdev, fm10k_uc_vlan_unsync); + __dev_mc_unsync(netdev, fm10k_mc_vlan_unsync); + + fm10k_mbx_unlock(interface); + + return 0; +} + +static int fm10k_vlan_rx_add_vid(struct net_device *netdev, + __always_unused __be16 proto, u16 vid) +{ + /* update VLAN and address table based on changes */ + return fm10k_update_vid(netdev, vid, true); +} + +static int fm10k_vlan_rx_kill_vid(struct net_device *netdev, + __always_unused __be16 proto, u16 vid) +{ + /* update VLAN and address table based on changes */ + return fm10k_update_vid(netdev, vid, false); +} + +static u16 fm10k_find_next_vlan(struct fm10k_intfc *interface, u16 vid) +{ + struct fm10k_hw *hw = &interface->hw; + u16 default_vid = hw->mac.default_vid; + u16 vid_limit = vid < default_vid ? default_vid : VLAN_N_VID; + + vid = find_next_bit(interface->active_vlans, vid_limit, ++vid); + + return vid; +} + +static void fm10k_clear_unused_vlans(struct fm10k_intfc *interface) +{ + struct fm10k_hw *hw = &interface->hw; + u32 vid, prev_vid; + + /* loop through and find any gaps in the table */ + for (vid = 0, prev_vid = 0; + prev_vid < VLAN_N_VID; + prev_vid = vid + 1, vid = fm10k_find_next_vlan(interface, vid)) { + if (prev_vid == vid) + continue; + + /* send request to clear multiple bits at a time */ + prev_vid += (vid - prev_vid - 1) << FM10K_VLAN_LENGTH_SHIFT; + hw->mac.ops.update_vlan(hw, prev_vid, 0, false); + } +} + +static int __fm10k_uc_sync(struct net_device *dev, + const unsigned char *addr, bool sync) +{ + struct fm10k_intfc *interface = netdev_priv(dev); + struct fm10k_hw *hw = &interface->hw; + u16 vid, glort = interface->glort; + s32 err; + + if (!is_valid_ether_addr(addr)) + return -EADDRNOTAVAIL; + + /* update table with current entries */ + for (vid = hw->mac.default_vid ? fm10k_find_next_vlan(interface, 0) : 0; + vid < VLAN_N_VID; + vid = fm10k_find_next_vlan(interface, vid)) { + err = hw->mac.ops.update_uc_addr(hw, glort, addr, + vid, sync, 0); + if (err) + return err; + } + + return 0; +} + +static int fm10k_uc_sync(struct net_device *dev, + const unsigned char *addr) +{ + return __fm10k_uc_sync(dev, addr, true); +} + +static int fm10k_uc_unsync(struct net_device *dev, + const unsigned char *addr) +{ + return __fm10k_uc_sync(dev, addr, false); +} + +static int fm10k_set_mac(struct net_device *dev, void *p) +{ + struct fm10k_intfc *interface = netdev_priv(dev); + struct fm10k_hw *hw = &interface->hw; + struct sockaddr *addr = p; + s32 err = 0; + + if (!is_valid_ether_addr(addr->sa_data)) + return -EADDRNOTAVAIL; + + if (dev->flags & IFF_UP) { + /* setting MAC address requires mailbox */ + fm10k_mbx_lock(interface); + + err = fm10k_uc_sync(dev, addr->sa_data); + if (!err) + fm10k_uc_unsync(dev, hw->mac.addr); + + fm10k_mbx_unlock(interface); + } + + if (!err) { + ether_addr_copy(dev->dev_addr, addr->sa_data); + ether_addr_copy(hw->mac.addr, addr->sa_data); + dev->addr_assign_type &= ~NET_ADDR_RANDOM; + } + + /* if we had a mailbox error suggest trying again */ + return err ? -EAGAIN : 0; +} + +static int __fm10k_mc_sync(struct net_device *dev, + const unsigned char *addr, bool sync) +{ + struct fm10k_intfc *interface = netdev_priv(dev); + struct fm10k_hw *hw = &interface->hw; + u16 vid, glort = interface->glort; + s32 err; + + if (!is_multicast_ether_addr(addr)) + return -EADDRNOTAVAIL; + + /* update table with current entries */ + for (vid = hw->mac.default_vid ? fm10k_find_next_vlan(interface, 0) : 0; + vid < VLAN_N_VID; + vid = fm10k_find_next_vlan(interface, vid)) { + err = hw->mac.ops.update_mc_addr(hw, glort, addr, vid, sync); + if (err) + return err; + } + + return 0; +} + +static int fm10k_mc_sync(struct net_device *dev, + const unsigned char *addr) +{ + return __fm10k_mc_sync(dev, addr, true); +} + +static int fm10k_mc_unsync(struct net_device *dev, + const unsigned char *addr) +{ + return __fm10k_mc_sync(dev, addr, false); +} + +static void fm10k_set_rx_mode(struct net_device *dev) +{ + struct fm10k_intfc *interface = netdev_priv(dev); + struct fm10k_hw *hw = &interface->hw; + int xcast_mode; + + /* no need to update the harwdare if we are not running */ + if (!(dev->flags & IFF_UP)) + return; + + /* determine new mode based on flags */ + xcast_mode = (dev->flags & IFF_PROMISC) ? FM10K_XCAST_MODE_PROMISC : + (dev->flags & IFF_ALLMULTI) ? FM10K_XCAST_MODE_ALLMULTI : + (dev->flags & (IFF_BROADCAST | IFF_MULTICAST)) ? + FM10K_XCAST_MODE_MULTI : FM10K_XCAST_MODE_NONE; + + fm10k_mbx_lock(interface); + + /* syncronize all of the addresses */ + if (xcast_mode != FM10K_XCAST_MODE_PROMISC) { + __dev_uc_sync(dev, fm10k_uc_sync, fm10k_uc_unsync); + if (xcast_mode != FM10K_XCAST_MODE_ALLMULTI) + __dev_mc_sync(dev, fm10k_mc_sync, fm10k_mc_unsync); + } + + /* if we aren't changing modes there is nothing to do */ + if (interface->xcast_mode != xcast_mode) { + /* update VLAN table */ + if (xcast_mode == FM10K_XCAST_MODE_PROMISC) + hw->mac.ops.update_vlan(hw, FM10K_VLAN_ALL, 0, true); + if (interface->xcast_mode == FM10K_XCAST_MODE_PROMISC) + fm10k_clear_unused_vlans(interface); + + /* update xcast mode */ + hw->mac.ops.update_xcast_mode(hw, interface->glort, xcast_mode); + + /* record updated xcast mode state */ + interface->xcast_mode = xcast_mode; + } + + fm10k_mbx_unlock(interface); +} + +void fm10k_restore_rx_state(struct fm10k_intfc *interface) +{ + struct net_device *netdev = interface->netdev; + struct fm10k_hw *hw = &interface->hw; + int xcast_mode; + u16 vid, glort; + + /* restore our address if perm_addr is set */ + 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; + } + + /* record glort for this interface */ + glort = interface->glort; + + /* convert interface flags to xcast mode */ + if (netdev->flags & IFF_PROMISC) + xcast_mode = FM10K_XCAST_MODE_PROMISC; + else if (netdev->flags & IFF_ALLMULTI) + xcast_mode = FM10K_XCAST_MODE_ALLMULTI; + else if (netdev->flags & (IFF_BROADCAST | IFF_MULTICAST)) + xcast_mode = FM10K_XCAST_MODE_MULTI; + else + xcast_mode = FM10K_XCAST_MODE_NONE; + + fm10k_mbx_lock(interface); + + /* Enable logical port */ + hw->mac.ops.update_lport_state(hw, glort, interface->glort_count, true); + + /* update VLAN table */ + hw->mac.ops.update_vlan(hw, FM10K_VLAN_ALL, 0, + xcast_mode == FM10K_XCAST_MODE_PROMISC); + + /* Add filter for VLAN 0 */ + hw->mac.ops.update_vlan(hw, 0, 0, true); + + /* update table with current entries */ + for (vid = hw->mac.default_vid ? fm10k_find_next_vlan(interface, 0) : 0; + vid < VLAN_N_VID; + vid = fm10k_find_next_vlan(interface, vid)) { + hw->mac.ops.update_vlan(hw, vid, 0, true); + hw->mac.ops.update_uc_addr(hw, glort, hw->mac.addr, + vid, true, 0); + } + + /* syncronize all of the addresses */ + if (xcast_mode != FM10K_XCAST_MODE_PROMISC) { + __dev_uc_sync(netdev, fm10k_uc_sync, fm10k_uc_unsync); + if (xcast_mode != FM10K_XCAST_MODE_ALLMULTI) + __dev_mc_sync(netdev, fm10k_mc_sync, fm10k_mc_unsync); + } + + /* update xcast mode */ + hw->mac.ops.update_xcast_mode(hw, glort, xcast_mode); + + fm10k_mbx_unlock(interface); + + /* record updated xcast mode state */ + interface->xcast_mode = xcast_mode; + + /* Restore tunnel configuration */ + fm10k_restore_vxlan_port(interface); +} + +void fm10k_reset_rx_state(struct fm10k_intfc *interface) +{ + struct net_device *netdev = interface->netdev; + struct fm10k_hw *hw = &interface->hw; + + fm10k_mbx_lock(interface); + + /* clear the logical port state on lower device */ + hw->mac.ops.update_lport_state(hw, interface->glort, + interface->glort_count, false); + + fm10k_mbx_unlock(interface); + + /* reset flags to default state */ + interface->xcast_mode = FM10K_XCAST_MODE_NONE; + + /* clear the sync flag since the lport has been dropped */ + __dev_uc_unsync(netdev, NULL); + __dev_mc_unsync(netdev, NULL); +} + +/** + * fm10k_get_stats64 - Get System Network Statistics + * @netdev: network interface device structure + * @stats: storage space for 64bit statistics + * + * Returns 64bit statistics, for use in the ndo_get_stats64 callback. This + * function replaces fm10k_get_stats for kernels which support it. + */ +static struct rtnl_link_stats64 *fm10k_get_stats64(struct net_device *netdev, + struct rtnl_link_stats64 *stats) +{ + struct fm10k_intfc *interface = netdev_priv(netdev); + struct fm10k_ring *ring; + unsigned int start, i; + u64 bytes, packets; + + rcu_read_lock(); + + for (i = 0; i < interface->num_rx_queues; i++) { + ring = ACCESS_ONCE(interface->rx_ring[i]); + + if (!ring) + continue; + + do { + start = u64_stats_fetch_begin_irq(&ring->syncp); + packets = ring->stats.packets; + bytes = ring->stats.bytes; + } while (u64_stats_fetch_retry_irq(&ring->syncp, start)); + + stats->rx_packets += packets; + stats->rx_bytes += bytes; + } + + for (i = 0; i < interface->num_tx_queues; i++) { + ring = ACCESS_ONCE(interface->rx_ring[i]); + + if (!ring) + continue; + + do { + start = u64_stats_fetch_begin_irq(&ring->syncp); + packets = ring->stats.packets; + bytes = ring->stats.bytes; + } while (u64_stats_fetch_retry_irq(&ring->syncp, start)); + + stats->tx_packets += packets; + stats->tx_bytes += bytes; + } + + rcu_read_unlock(); + + /* following stats updated by fm10k_service_task() */ + stats->rx_missed_errors = netdev->stats.rx_missed_errors; + + return stats; +} + +int fm10k_setup_tc(struct net_device *dev, u8 tc) +{ + struct fm10k_intfc *interface = netdev_priv(dev); + + /* Currently only the PF supports priority classes */ + if (tc && (interface->hw.mac.type != fm10k_mac_pf)) + return -EINVAL; + + /* Hardware supports up to 8 traffic classes */ + if (tc > 8) + return -EINVAL; + + /* Hardware has to reinitialize queues to match packet + * buffer alignment. Unfortunately, the hardware is not + * flexible enough to do this dynamically. + */ + if (netif_running(dev)) + fm10k_close(dev); + + fm10k_mbx_free_irq(interface); + + fm10k_clear_queueing_scheme(interface); + + /* we expect the prio_tc map to be repopulated later */ + netdev_reset_tc(dev); + netdev_set_num_tc(dev, tc); + + fm10k_init_queueing_scheme(interface); + + fm10k_mbx_request_irq(interface); + + if (netif_running(dev)) + fm10k_open(dev); + + /* flag to indicate SWPRI has yet to be updated */ + interface->flags |= FM10K_FLAG_SWPRI_CONFIG; + + return 0; +} + +static int fm10k_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) +{ + switch (cmd) { + case SIOCGHWTSTAMP: + return fm10k_get_ts_config(netdev, ifr); + case SIOCSHWTSTAMP: + return fm10k_set_ts_config(netdev, ifr); + default: + return -EOPNOTSUPP; + } +} + +static void fm10k_assign_l2_accel(struct fm10k_intfc *interface, + struct fm10k_l2_accel *l2_accel) +{ + struct fm10k_ring *ring; + int i; + + for (i = 0; i < interface->num_rx_queues; i++) { + ring = interface->rx_ring[i]; + rcu_assign_pointer(ring->l2_accel, l2_accel); + } + + interface->l2_accel = l2_accel; +} + +static void *fm10k_dfwd_add_station(struct net_device *dev, + struct net_device *sdev) +{ + struct fm10k_intfc *interface = netdev_priv(dev); + struct fm10k_l2_accel *l2_accel = interface->l2_accel; + struct fm10k_l2_accel *old_l2_accel = NULL; + struct fm10k_dglort_cfg dglort = { 0 }; + struct fm10k_hw *hw = &interface->hw; + int size = 0, i; + u16 glort; + + /* allocate l2 accel structure if it is not available */ + if (!l2_accel) { + /* verify there is enough free GLORTs to support l2_accel */ + if (interface->glort_count < 7) + return ERR_PTR(-EBUSY); + + size = offsetof(struct fm10k_l2_accel, macvlan[7]); + l2_accel = kzalloc(size, GFP_KERNEL); + if (!l2_accel) + return ERR_PTR(-ENOMEM); + + l2_accel->size = 7; + l2_accel->dglort = interface->glort; + + /* update pointers */ + fm10k_assign_l2_accel(interface, l2_accel); + /* do not expand if we are at our limit */ + } else if ((l2_accel->count == FM10K_MAX_STATIONS) || + (l2_accel->count == (interface->glort_count - 1))) { + return ERR_PTR(-EBUSY); + /* expand if we have hit the size limit */ + } else if (l2_accel->count == l2_accel->size) { + old_l2_accel = l2_accel; + size = offsetof(struct fm10k_l2_accel, + macvlan[(l2_accel->size * 2) + 1]); + l2_accel = kzalloc(size, GFP_KERNEL); + if (!l2_accel) + return ERR_PTR(-ENOMEM); + + memcpy(l2_accel, old_l2_accel, + offsetof(struct fm10k_l2_accel, + macvlan[old_l2_accel->size])); + + l2_accel->size = (old_l2_accel->size * 2) + 1; + + /* update pointers */ + fm10k_assign_l2_accel(interface, l2_accel); + kfree_rcu(old_l2_accel, rcu); + } + + /* add macvlan to accel table, and record GLORT for position */ + for (i = 0; i < l2_accel->size; i++) { + if (!l2_accel->macvlan[i]) + break; + } + + /* record station */ + l2_accel->macvlan[i] = sdev; + l2_accel->count++; + + /* configure default DGLORT mapping for RSS/DCB */ + dglort.idx = fm10k_dglort_pf_rss; + 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); + dglort.glort = interface->glort; + dglort.shared_l = fls(l2_accel->size); + hw->mac.ops.configure_dglort_map(hw, &dglort); + + /* Add rules for this specific dglort to the switch */ + fm10k_mbx_lock(interface); + + glort = l2_accel->dglort + 1 + i; + hw->mac.ops.update_xcast_mode(hw, glort, FM10K_XCAST_MODE_MULTI); + hw->mac.ops.update_uc_addr(hw, glort, sdev->dev_addr, 0, true, 0); + + fm10k_mbx_unlock(interface); + + return sdev; +} + +static void fm10k_dfwd_del_station(struct net_device *dev, void *priv) +{ + struct fm10k_intfc *interface = netdev_priv(dev); + struct fm10k_l2_accel *l2_accel = ACCESS_ONCE(interface->l2_accel); + struct fm10k_dglort_cfg dglort = { 0 }; + struct fm10k_hw *hw = &interface->hw; + struct net_device *sdev = priv; + int i; + u16 glort; + + if (!l2_accel) + return; + + /* search table for matching interface */ + for (i = 0; i < l2_accel->size; i++) { + if (l2_accel->macvlan[i] == sdev) + break; + } + + /* exit if macvlan not found */ + if (i == l2_accel->size) + return; + + /* Remove any rules specific to this dglort */ + fm10k_mbx_lock(interface); + + glort = l2_accel->dglort + 1 + i; + hw->mac.ops.update_xcast_mode(hw, glort, FM10K_XCAST_MODE_NONE); + hw->mac.ops.update_uc_addr(hw, glort, sdev->dev_addr, 0, false, 0); + + fm10k_mbx_unlock(interface); + + /* record removal */ + l2_accel->macvlan[i] = NULL; + l2_accel->count--; + + /* configure default DGLORT mapping for RSS/DCB */ + dglort.idx = fm10k_dglort_pf_rss; + 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); + dglort.glort = interface->glort; + if (l2_accel) + dglort.shared_l = fls(l2_accel->size); + hw->mac.ops.configure_dglort_map(hw, &dglort); + + /* If table is empty remove it */ + if (l2_accel->count == 0) { + fm10k_assign_l2_accel(interface, NULL); + kfree_rcu(l2_accel, rcu); + } +} + +static const struct net_device_ops fm10k_netdev_ops = { + .ndo_open = fm10k_open, + .ndo_stop = fm10k_close, + .ndo_validate_addr = eth_validate_addr, + .ndo_start_xmit = fm10k_xmit_frame, + .ndo_set_mac_address = fm10k_set_mac, + .ndo_change_mtu = fm10k_change_mtu, + .ndo_tx_timeout = fm10k_tx_timeout, + .ndo_vlan_rx_add_vid = fm10k_vlan_rx_add_vid, + .ndo_vlan_rx_kill_vid = fm10k_vlan_rx_kill_vid, + .ndo_set_rx_mode = fm10k_set_rx_mode, + .ndo_get_stats64 = fm10k_get_stats64, + .ndo_setup_tc = fm10k_setup_tc, + .ndo_set_vf_mac = fm10k_ndo_set_vf_mac, + .ndo_set_vf_vlan = fm10k_ndo_set_vf_vlan, + .ndo_set_vf_rate = fm10k_ndo_set_vf_bw, + .ndo_get_vf_config = fm10k_ndo_get_vf_config, + .ndo_add_vxlan_port = fm10k_add_vxlan_port, + .ndo_del_vxlan_port = fm10k_del_vxlan_port, + .ndo_do_ioctl = fm10k_ioctl, + .ndo_dfwd_add_station = fm10k_dfwd_add_station, + .ndo_dfwd_del_station = fm10k_dfwd_del_station, +}; + +#define DEFAULT_DEBUG_LEVEL_SHIFT 3 + +struct net_device *fm10k_alloc_netdev(void) +{ + struct fm10k_intfc *interface; + struct net_device *dev; + + dev = alloc_etherdev_mq(sizeof(struct fm10k_intfc), MAX_QUEUES); + if (!dev) + return NULL; + + /* set net device and ethtool ops */ + dev->netdev_ops = &fm10k_netdev_ops; + fm10k_set_ethtool_ops(dev); + + /* configure default debug level */ + interface = netdev_priv(dev); + interface->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1; + + /* configure default features */ + dev->features |= NETIF_F_IP_CSUM | + NETIF_F_IPV6_CSUM | + NETIF_F_SG | + NETIF_F_TSO | + NETIF_F_TSO6 | + NETIF_F_TSO_ECN | + NETIF_F_GSO_UDP_TUNNEL | + NETIF_F_RXHASH | + NETIF_F_RXCSUM; + + /* all features defined to this point should be changeable */ + dev->hw_features |= dev->features; + + /* allow user to enable L2 forwarding acceleration */ + dev->hw_features |= NETIF_F_HW_L2FW_DOFFLOAD; + + /* configure VLAN features */ + dev->vlan_features |= dev->features; + + /* configure tunnel offloads */ + dev->hw_enc_features = NETIF_F_IP_CSUM | + NETIF_F_TSO | + NETIF_F_TSO6 | + NETIF_F_TSO_ECN | + NETIF_F_GSO_UDP_TUNNEL | + NETIF_F_IPV6_CSUM | + NETIF_F_SG; + + /* we want to leave these both on as we cannot disable VLAN tag + * insertion or stripping on the hardware since it is contained + * in the FTAG and not in the frame itself. + */ + dev->features |= NETIF_F_HW_VLAN_CTAG_TX | + NETIF_F_HW_VLAN_CTAG_RX | + NETIF_F_HW_VLAN_CTAG_FILTER; + + dev->priv_flags |= IFF_UNICAST_FLT; + + return dev; +} |