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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 "fm10k.h"
- #include <linux/vmalloc.h>
- #if IS_ENABLED(CONFIG_FM10K_VXLAN)
- #include <net/vxlan.h>
- #endif /* CONFIG_FM10K_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 interface 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_FM10K_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)) &&
- !skb_vlan_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) {
- dev_kfree_skb(skb);
- 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;
- int i;
- /* 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;
- /* update active_vlans bitmask */
- set_bit(vid, interface->active_vlans);
- if (!set)
- clear_bit(vid, interface->active_vlans);
- /* disable the default VID on ring if we have an active VLAN */
- for (i = 0; i < interface->num_rx_queues; i++) {
- struct fm10k_ring *rx_ring = interface->rx_ring[i];
- u16 rx_vid = rx_ring->vid & (VLAN_N_VID - 1);
- if (test_bit(rx_vid, interface->active_vlans))
- rx_ring->vid |= FM10K_VLAN_CLEAR;
- else
- rx_ring->vid &= ~FM10K_VLAN_CLEAR;
- }
- /* Do not remove default VID related entries from VLAN and MAC tables */
- if (!set && vid == hw->mac.default_vid)
- return 0;
- /* Do not throw an error if the interface is down. We will sync once
- * we come up
- */
- if (test_bit(__FM10K_DOWN, &interface->state))
- return 0;
- fm10k_mbx_lock(interface);
- /* only need to update the VLAN if not in promiscuous mode */
- if (!(netdev->flags & IFF_PROMISC)) {
- err = hw->mac.ops.update_vlan(hw, vid, 0, set);
- if (err)
- goto err_out;
- }
- /* update our base MAC address */
- err = hw->mac.ops.update_uc_addr(hw, interface->glort, hw->mac.addr,
- vid, set, 0);
- if (err)
- goto err_out;
- /* 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);
- err_out:
- fm10k_mbx_unlock(interface);
- return err;
- }
- 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;
- /* 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_mc_addr(hw, glort, addr, vid, sync);
- }
- 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);
- /* update xcast mode first, but only if it changed */
- 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;
- }
- /* synchronize 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);
- }
- 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;
- /* 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);
- }
- /* update xcast mode before synchronizing addresses */
- hw->mac.ops.update_xcast_mode(hw, glort, xcast_mode);
- /* synchronize 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);
- }
- 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->tx_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;
- 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 netdev_features_t fm10k_features_check(struct sk_buff *skb,
- struct net_device *dev,
- netdev_features_t features)
- {
- if (!skb->encapsulation || fm10k_tx_encap_offload(skb))
- return features;
- return features & ~(NETIF_F_ALL_CSUM | NETIF_F_GSO_MASK);
- }
- 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,
- #ifdef CONFIG_NET_POLL_CONTROLLER
- .ndo_poll_controller = fm10k_netpoll,
- #endif
- .ndo_features_check = fm10k_features_check,
- };
- #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;
- /* 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;
- }
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