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0001 // SPDX-License-Identifier: GPL-2.0
0002 /* Copyright(c) 2013 - 2019 Intel Corporation. */
0003 
0004 #include "fm10k.h"
0005 #include <linux/vmalloc.h>
0006 #include <net/udp_tunnel.h>
0007 #include <linux/if_macvlan.h>
0008 
0009 /**
0010  * fm10k_setup_tx_resources - allocate Tx resources (Descriptors)
0011  * @tx_ring:    tx descriptor ring (for a specific queue) to setup
0012  *
0013  * Return 0 on success, negative on failure
0014  **/
0015 int fm10k_setup_tx_resources(struct fm10k_ring *tx_ring)
0016 {
0017     struct device *dev = tx_ring->dev;
0018     int size;
0019 
0020     size = sizeof(struct fm10k_tx_buffer) * tx_ring->count;
0021 
0022     tx_ring->tx_buffer = vzalloc(size);
0023     if (!tx_ring->tx_buffer)
0024         goto err;
0025 
0026     u64_stats_init(&tx_ring->syncp);
0027 
0028     /* round up to nearest 4K */
0029     tx_ring->size = tx_ring->count * sizeof(struct fm10k_tx_desc);
0030     tx_ring->size = ALIGN(tx_ring->size, 4096);
0031 
0032     tx_ring->desc = dma_alloc_coherent(dev, tx_ring->size,
0033                        &tx_ring->dma, GFP_KERNEL);
0034     if (!tx_ring->desc)
0035         goto err;
0036 
0037     return 0;
0038 
0039 err:
0040     vfree(tx_ring->tx_buffer);
0041     tx_ring->tx_buffer = NULL;
0042     return -ENOMEM;
0043 }
0044 
0045 /**
0046  * fm10k_setup_all_tx_resources - allocate all queues Tx resources
0047  * @interface: board private structure
0048  *
0049  * If this function returns with an error, then it's possible one or
0050  * more of the rings is populated (while the rest are not).  It is the
0051  * callers duty to clean those orphaned rings.
0052  *
0053  * Return 0 on success, negative on failure
0054  **/
0055 static int fm10k_setup_all_tx_resources(struct fm10k_intfc *interface)
0056 {
0057     int i, err;
0058 
0059     for (i = 0; i < interface->num_tx_queues; i++) {
0060         err = fm10k_setup_tx_resources(interface->tx_ring[i]);
0061         if (!err)
0062             continue;
0063 
0064         netif_err(interface, probe, interface->netdev,
0065               "Allocation for Tx Queue %u failed\n", i);
0066         goto err_setup_tx;
0067     }
0068 
0069     return 0;
0070 err_setup_tx:
0071     /* rewind the index freeing the rings as we go */
0072     while (i--)
0073         fm10k_free_tx_resources(interface->tx_ring[i]);
0074     return err;
0075 }
0076 
0077 /**
0078  * fm10k_setup_rx_resources - allocate Rx resources (Descriptors)
0079  * @rx_ring:    rx descriptor ring (for a specific queue) to setup
0080  *
0081  * Returns 0 on success, negative on failure
0082  **/
0083 int fm10k_setup_rx_resources(struct fm10k_ring *rx_ring)
0084 {
0085     struct device *dev = rx_ring->dev;
0086     int size;
0087 
0088     size = sizeof(struct fm10k_rx_buffer) * rx_ring->count;
0089 
0090     rx_ring->rx_buffer = vzalloc(size);
0091     if (!rx_ring->rx_buffer)
0092         goto err;
0093 
0094     u64_stats_init(&rx_ring->syncp);
0095 
0096     /* Round up to nearest 4K */
0097     rx_ring->size = rx_ring->count * sizeof(union fm10k_rx_desc);
0098     rx_ring->size = ALIGN(rx_ring->size, 4096);
0099 
0100     rx_ring->desc = dma_alloc_coherent(dev, rx_ring->size,
0101                        &rx_ring->dma, GFP_KERNEL);
0102     if (!rx_ring->desc)
0103         goto err;
0104 
0105     return 0;
0106 err:
0107     vfree(rx_ring->rx_buffer);
0108     rx_ring->rx_buffer = NULL;
0109     return -ENOMEM;
0110 }
0111 
0112 /**
0113  * fm10k_setup_all_rx_resources - allocate all queues Rx resources
0114  * @interface: board private structure
0115  *
0116  * If this function returns with an error, then it's possible one or
0117  * more of the rings is populated (while the rest are not).  It is the
0118  * callers duty to clean those orphaned rings.
0119  *
0120  * Return 0 on success, negative on failure
0121  **/
0122 static int fm10k_setup_all_rx_resources(struct fm10k_intfc *interface)
0123 {
0124     int i, err;
0125 
0126     for (i = 0; i < interface->num_rx_queues; i++) {
0127         err = fm10k_setup_rx_resources(interface->rx_ring[i]);
0128         if (!err)
0129             continue;
0130 
0131         netif_err(interface, probe, interface->netdev,
0132               "Allocation for Rx Queue %u failed\n", i);
0133         goto err_setup_rx;
0134     }
0135 
0136     return 0;
0137 err_setup_rx:
0138     /* rewind the index freeing the rings as we go */
0139     while (i--)
0140         fm10k_free_rx_resources(interface->rx_ring[i]);
0141     return err;
0142 }
0143 
0144 void fm10k_unmap_and_free_tx_resource(struct fm10k_ring *ring,
0145                       struct fm10k_tx_buffer *tx_buffer)
0146 {
0147     if (tx_buffer->skb) {
0148         dev_kfree_skb_any(tx_buffer->skb);
0149         if (dma_unmap_len(tx_buffer, len))
0150             dma_unmap_single(ring->dev,
0151                      dma_unmap_addr(tx_buffer, dma),
0152                      dma_unmap_len(tx_buffer, len),
0153                      DMA_TO_DEVICE);
0154     } else if (dma_unmap_len(tx_buffer, len)) {
0155         dma_unmap_page(ring->dev,
0156                    dma_unmap_addr(tx_buffer, dma),
0157                    dma_unmap_len(tx_buffer, len),
0158                    DMA_TO_DEVICE);
0159     }
0160     tx_buffer->next_to_watch = NULL;
0161     tx_buffer->skb = NULL;
0162     dma_unmap_len_set(tx_buffer, len, 0);
0163     /* tx_buffer must be completely set up in the transmit path */
0164 }
0165 
0166 /**
0167  * fm10k_clean_tx_ring - Free Tx Buffers
0168  * @tx_ring: ring to be cleaned
0169  **/
0170 static void fm10k_clean_tx_ring(struct fm10k_ring *tx_ring)
0171 {
0172     unsigned long size;
0173     u16 i;
0174 
0175     /* ring already cleared, nothing to do */
0176     if (!tx_ring->tx_buffer)
0177         return;
0178 
0179     /* Free all the Tx ring sk_buffs */
0180     for (i = 0; i < tx_ring->count; i++) {
0181         struct fm10k_tx_buffer *tx_buffer = &tx_ring->tx_buffer[i];
0182 
0183         fm10k_unmap_and_free_tx_resource(tx_ring, tx_buffer);
0184     }
0185 
0186     /* reset BQL values */
0187     netdev_tx_reset_queue(txring_txq(tx_ring));
0188 
0189     size = sizeof(struct fm10k_tx_buffer) * tx_ring->count;
0190     memset(tx_ring->tx_buffer, 0, size);
0191 
0192     /* Zero out the descriptor ring */
0193     memset(tx_ring->desc, 0, tx_ring->size);
0194 }
0195 
0196 /**
0197  * fm10k_free_tx_resources - Free Tx Resources per Queue
0198  * @tx_ring: Tx descriptor ring for a specific queue
0199  *
0200  * Free all transmit software resources
0201  **/
0202 void fm10k_free_tx_resources(struct fm10k_ring *tx_ring)
0203 {
0204     fm10k_clean_tx_ring(tx_ring);
0205 
0206     vfree(tx_ring->tx_buffer);
0207     tx_ring->tx_buffer = NULL;
0208 
0209     /* if not set, then don't free */
0210     if (!tx_ring->desc)
0211         return;
0212 
0213     dma_free_coherent(tx_ring->dev, tx_ring->size,
0214               tx_ring->desc, tx_ring->dma);
0215     tx_ring->desc = NULL;
0216 }
0217 
0218 /**
0219  * fm10k_clean_all_tx_rings - Free Tx Buffers for all queues
0220  * @interface: board private structure
0221  **/
0222 void fm10k_clean_all_tx_rings(struct fm10k_intfc *interface)
0223 {
0224     int i;
0225 
0226     for (i = 0; i < interface->num_tx_queues; i++)
0227         fm10k_clean_tx_ring(interface->tx_ring[i]);
0228 }
0229 
0230 /**
0231  * fm10k_free_all_tx_resources - Free Tx Resources for All Queues
0232  * @interface: board private structure
0233  *
0234  * Free all transmit software resources
0235  **/
0236 static void fm10k_free_all_tx_resources(struct fm10k_intfc *interface)
0237 {
0238     int i = interface->num_tx_queues;
0239 
0240     while (i--)
0241         fm10k_free_tx_resources(interface->tx_ring[i]);
0242 }
0243 
0244 /**
0245  * fm10k_clean_rx_ring - Free Rx Buffers per Queue
0246  * @rx_ring: ring to free buffers from
0247  **/
0248 static void fm10k_clean_rx_ring(struct fm10k_ring *rx_ring)
0249 {
0250     unsigned long size;
0251     u16 i;
0252 
0253     if (!rx_ring->rx_buffer)
0254         return;
0255 
0256     dev_kfree_skb(rx_ring->skb);
0257     rx_ring->skb = NULL;
0258 
0259     /* Free all the Rx ring sk_buffs */
0260     for (i = 0; i < rx_ring->count; i++) {
0261         struct fm10k_rx_buffer *buffer = &rx_ring->rx_buffer[i];
0262         /* clean-up will only set page pointer to NULL */
0263         if (!buffer->page)
0264             continue;
0265 
0266         dma_unmap_page(rx_ring->dev, buffer->dma,
0267                    PAGE_SIZE, DMA_FROM_DEVICE);
0268         __free_page(buffer->page);
0269 
0270         buffer->page = NULL;
0271     }
0272 
0273     size = sizeof(struct fm10k_rx_buffer) * rx_ring->count;
0274     memset(rx_ring->rx_buffer, 0, size);
0275 
0276     /* Zero out the descriptor ring */
0277     memset(rx_ring->desc, 0, rx_ring->size);
0278 
0279     rx_ring->next_to_alloc = 0;
0280     rx_ring->next_to_clean = 0;
0281     rx_ring->next_to_use = 0;
0282 }
0283 
0284 /**
0285  * fm10k_free_rx_resources - Free Rx Resources
0286  * @rx_ring: ring to clean the resources from
0287  *
0288  * Free all receive software resources
0289  **/
0290 void fm10k_free_rx_resources(struct fm10k_ring *rx_ring)
0291 {
0292     fm10k_clean_rx_ring(rx_ring);
0293 
0294     vfree(rx_ring->rx_buffer);
0295     rx_ring->rx_buffer = NULL;
0296 
0297     /* if not set, then don't free */
0298     if (!rx_ring->desc)
0299         return;
0300 
0301     dma_free_coherent(rx_ring->dev, rx_ring->size,
0302               rx_ring->desc, rx_ring->dma);
0303 
0304     rx_ring->desc = NULL;
0305 }
0306 
0307 /**
0308  * fm10k_clean_all_rx_rings - Free Rx Buffers for all queues
0309  * @interface: board private structure
0310  **/
0311 void fm10k_clean_all_rx_rings(struct fm10k_intfc *interface)
0312 {
0313     int i;
0314 
0315     for (i = 0; i < interface->num_rx_queues; i++)
0316         fm10k_clean_rx_ring(interface->rx_ring[i]);
0317 }
0318 
0319 /**
0320  * fm10k_free_all_rx_resources - Free Rx Resources for All Queues
0321  * @interface: board private structure
0322  *
0323  * Free all receive software resources
0324  **/
0325 static void fm10k_free_all_rx_resources(struct fm10k_intfc *interface)
0326 {
0327     int i = interface->num_rx_queues;
0328 
0329     while (i--)
0330         fm10k_free_rx_resources(interface->rx_ring[i]);
0331 }
0332 
0333 /**
0334  * fm10k_request_glort_range - Request GLORTs for use in configuring rules
0335  * @interface: board private structure
0336  *
0337  * This function allocates a range of glorts for this interface to use.
0338  **/
0339 static void fm10k_request_glort_range(struct fm10k_intfc *interface)
0340 {
0341     struct fm10k_hw *hw = &interface->hw;
0342     u16 mask = (~hw->mac.dglort_map) >> FM10K_DGLORTMAP_MASK_SHIFT;
0343 
0344     /* establish GLORT base */
0345     interface->glort = hw->mac.dglort_map & FM10K_DGLORTMAP_NONE;
0346     interface->glort_count = 0;
0347 
0348     /* nothing we can do until mask is allocated */
0349     if (hw->mac.dglort_map == FM10K_DGLORTMAP_NONE)
0350         return;
0351 
0352     /* we support 3 possible GLORT configurations.
0353      * 1: VFs consume all but the last 1
0354      * 2: VFs and PF split glorts with possible gap between
0355      * 3: VFs allocated first 64, all others belong to PF
0356      */
0357     if (mask <= hw->iov.total_vfs) {
0358         interface->glort_count = 1;
0359         interface->glort += mask;
0360     } else if (mask < 64) {
0361         interface->glort_count = (mask + 1) / 2;
0362         interface->glort += interface->glort_count;
0363     } else {
0364         interface->glort_count = mask - 63;
0365         interface->glort += 64;
0366     }
0367 }
0368 
0369 /**
0370  * fm10k_restore_udp_port_info
0371  * @interface: board private structure
0372  *
0373  * This function restores the value in the tunnel_cfg register(s) after reset
0374  **/
0375 static void fm10k_restore_udp_port_info(struct fm10k_intfc *interface)
0376 {
0377     struct fm10k_hw *hw = &interface->hw;
0378 
0379     /* only the PF supports configuring tunnels */
0380     if (hw->mac.type != fm10k_mac_pf)
0381         return;
0382 
0383     /* restore tunnel configuration register */
0384     fm10k_write_reg(hw, FM10K_TUNNEL_CFG,
0385             ntohs(interface->vxlan_port) |
0386             (ETH_P_TEB << FM10K_TUNNEL_CFG_NVGRE_SHIFT));
0387 
0388     /* restore Geneve tunnel configuration register */
0389     fm10k_write_reg(hw, FM10K_TUNNEL_CFG_GENEVE,
0390             ntohs(interface->geneve_port));
0391 }
0392 
0393 /**
0394  * fm10k_udp_tunnel_sync - Called when UDP tunnel ports change
0395  * @dev: network interface device structure
0396  * @table: Tunnel table (according to tables of @fm10k_udp_tunnels)
0397  *
0398  * This function is called when a new UDP tunnel port is added or deleted.
0399  * Due to hardware restrictions, only one port per type can be offloaded at
0400  * once. Core will send to the driver a port of its choice.
0401  **/
0402 static int fm10k_udp_tunnel_sync(struct net_device *dev, unsigned int table)
0403 {
0404     struct fm10k_intfc *interface = netdev_priv(dev);
0405     struct udp_tunnel_info ti;
0406 
0407     udp_tunnel_nic_get_port(dev, table, 0, &ti);
0408     if (!table)
0409         interface->vxlan_port = ti.port;
0410     else
0411         interface->geneve_port = ti.port;
0412 
0413     fm10k_restore_udp_port_info(interface);
0414     return 0;
0415 }
0416 
0417 static const struct udp_tunnel_nic_info fm10k_udp_tunnels = {
0418     .sync_table = fm10k_udp_tunnel_sync,
0419     .tables     = {
0420         { .n_entries = 1, .tunnel_types = UDP_TUNNEL_TYPE_VXLAN,  },
0421         { .n_entries = 1, .tunnel_types = UDP_TUNNEL_TYPE_GENEVE, },
0422     },
0423 };
0424 
0425 /**
0426  * fm10k_open - Called when a network interface is made active
0427  * @netdev: network interface device structure
0428  *
0429  * Returns 0 on success, negative value on failure
0430  *
0431  * The open entry point is called when a network interface is made
0432  * active by the system (IFF_UP).  At this point all resources needed
0433  * for transmit and receive operations are allocated, the interrupt
0434  * handler is registered with the OS, the watchdog timer is started,
0435  * and the stack is notified that the interface is ready.
0436  **/
0437 int fm10k_open(struct net_device *netdev)
0438 {
0439     struct fm10k_intfc *interface = netdev_priv(netdev);
0440     int err;
0441 
0442     /* allocate transmit descriptors */
0443     err = fm10k_setup_all_tx_resources(interface);
0444     if (err)
0445         goto err_setup_tx;
0446 
0447     /* allocate receive descriptors */
0448     err = fm10k_setup_all_rx_resources(interface);
0449     if (err)
0450         goto err_setup_rx;
0451 
0452     /* allocate interrupt resources */
0453     err = fm10k_qv_request_irq(interface);
0454     if (err)
0455         goto err_req_irq;
0456 
0457     /* setup GLORT assignment for this port */
0458     fm10k_request_glort_range(interface);
0459 
0460     /* Notify the stack of the actual queue counts */
0461     err = netif_set_real_num_tx_queues(netdev,
0462                        interface->num_tx_queues);
0463     if (err)
0464         goto err_set_queues;
0465 
0466     err = netif_set_real_num_rx_queues(netdev,
0467                        interface->num_rx_queues);
0468     if (err)
0469         goto err_set_queues;
0470 
0471     fm10k_up(interface);
0472 
0473     return 0;
0474 
0475 err_set_queues:
0476     fm10k_qv_free_irq(interface);
0477 err_req_irq:
0478     fm10k_free_all_rx_resources(interface);
0479 err_setup_rx:
0480     fm10k_free_all_tx_resources(interface);
0481 err_setup_tx:
0482     return err;
0483 }
0484 
0485 /**
0486  * fm10k_close - Disables a network interface
0487  * @netdev: network interface device structure
0488  *
0489  * Returns 0, this is not allowed to fail
0490  *
0491  * The close entry point is called when an interface is de-activated
0492  * by the OS.  The hardware is still under the drivers control, but
0493  * needs to be disabled.  A global MAC reset is issued to stop the
0494  * hardware, and all transmit and receive resources are freed.
0495  **/
0496 int fm10k_close(struct net_device *netdev)
0497 {
0498     struct fm10k_intfc *interface = netdev_priv(netdev);
0499 
0500     fm10k_down(interface);
0501 
0502     fm10k_qv_free_irq(interface);
0503 
0504     fm10k_free_all_tx_resources(interface);
0505     fm10k_free_all_rx_resources(interface);
0506 
0507     return 0;
0508 }
0509 
0510 static netdev_tx_t fm10k_xmit_frame(struct sk_buff *skb, struct net_device *dev)
0511 {
0512     struct fm10k_intfc *interface = netdev_priv(dev);
0513     int num_tx_queues = READ_ONCE(interface->num_tx_queues);
0514     unsigned int r_idx = skb->queue_mapping;
0515     int err;
0516 
0517     if (!num_tx_queues)
0518         return NETDEV_TX_BUSY;
0519 
0520     if ((skb->protocol == htons(ETH_P_8021Q)) &&
0521         !skb_vlan_tag_present(skb)) {
0522         /* FM10K only supports hardware tagging, any tags in frame
0523          * are considered 2nd level or "outer" tags
0524          */
0525         struct vlan_hdr *vhdr;
0526         __be16 proto;
0527 
0528         /* make sure skb is not shared */
0529         skb = skb_share_check(skb, GFP_ATOMIC);
0530         if (!skb)
0531             return NETDEV_TX_OK;
0532 
0533         /* make sure there is enough room to move the ethernet header */
0534         if (unlikely(!pskb_may_pull(skb, VLAN_ETH_HLEN)))
0535             return NETDEV_TX_OK;
0536 
0537         /* verify the skb head is not shared */
0538         err = skb_cow_head(skb, 0);
0539         if (err) {
0540             dev_kfree_skb(skb);
0541             return NETDEV_TX_OK;
0542         }
0543 
0544         /* locate VLAN header */
0545         vhdr = (struct vlan_hdr *)(skb->data + ETH_HLEN);
0546 
0547         /* pull the 2 key pieces of data out of it */
0548         __vlan_hwaccel_put_tag(skb,
0549                        htons(ETH_P_8021Q),
0550                        ntohs(vhdr->h_vlan_TCI));
0551         proto = vhdr->h_vlan_encapsulated_proto;
0552         skb->protocol = (ntohs(proto) >= 1536) ? proto :
0553                              htons(ETH_P_802_2);
0554 
0555         /* squash it by moving the ethernet addresses up 4 bytes */
0556         memmove(skb->data + VLAN_HLEN, skb->data, 12);
0557         __skb_pull(skb, VLAN_HLEN);
0558         skb_reset_mac_header(skb);
0559     }
0560 
0561     /* The minimum packet size for a single buffer is 17B so pad the skb
0562      * in order to meet this minimum size requirement.
0563      */
0564     if (unlikely(skb->len < 17)) {
0565         int pad_len = 17 - skb->len;
0566 
0567         if (skb_pad(skb, pad_len))
0568             return NETDEV_TX_OK;
0569         __skb_put(skb, pad_len);
0570     }
0571 
0572     if (r_idx >= num_tx_queues)
0573         r_idx %= num_tx_queues;
0574 
0575     err = fm10k_xmit_frame_ring(skb, interface->tx_ring[r_idx]);
0576 
0577     return err;
0578 }
0579 
0580 /**
0581  * fm10k_tx_timeout - Respond to a Tx Hang
0582  * @netdev: network interface device structure
0583  * @txqueue: the index of the Tx queue that timed out
0584  **/
0585 static void fm10k_tx_timeout(struct net_device *netdev, unsigned int txqueue)
0586 {
0587     struct fm10k_intfc *interface = netdev_priv(netdev);
0588     struct fm10k_ring *tx_ring;
0589     bool real_tx_hang = false;
0590 
0591     if (txqueue >= interface->num_tx_queues) {
0592         WARN(1, "invalid Tx queue index %d", txqueue);
0593         return;
0594     }
0595 
0596     tx_ring = interface->tx_ring[txqueue];
0597     if (check_for_tx_hang(tx_ring) && fm10k_check_tx_hang(tx_ring))
0598         real_tx_hang = true;
0599 
0600 #define TX_TIMEO_LIMIT 16000
0601     if (real_tx_hang) {
0602         fm10k_tx_timeout_reset(interface);
0603     } else {
0604         netif_info(interface, drv, netdev,
0605                "Fake Tx hang detected with timeout of %d seconds\n",
0606                netdev->watchdog_timeo / HZ);
0607 
0608         /* fake Tx hang - increase the kernel timeout */
0609         if (netdev->watchdog_timeo < TX_TIMEO_LIMIT)
0610             netdev->watchdog_timeo *= 2;
0611     }
0612 }
0613 
0614 /**
0615  * fm10k_host_mbx_ready - Check PF interface's mailbox readiness
0616  * @interface: board private structure
0617  *
0618  * This function checks if the PF interface's mailbox is ready before queueing
0619  * mailbox messages for transmission. This will prevent filling the TX mailbox
0620  * queue when the receiver is not ready. VF interfaces are exempt from this
0621  * check since it will block all PF-VF mailbox messages from being sent from
0622  * the VF to the PF at initialization.
0623  **/
0624 static bool fm10k_host_mbx_ready(struct fm10k_intfc *interface)
0625 {
0626     struct fm10k_hw *hw = &interface->hw;
0627 
0628     return (hw->mac.type == fm10k_mac_vf || interface->host_ready);
0629 }
0630 
0631 /**
0632  * fm10k_queue_vlan_request - Queue a VLAN update request
0633  * @interface: the fm10k interface structure
0634  * @vid: the VLAN vid
0635  * @vsi: VSI index number
0636  * @set: whether to set or clear
0637  *
0638  * This function queues up a VLAN update. For VFs, this must be sent to the
0639  * managing PF over the mailbox. For PFs, we'll use the same handling so that
0640  * it's similar to the VF. This avoids storming the PF<->VF mailbox with too
0641  * many VLAN updates during reset.
0642  */
0643 int fm10k_queue_vlan_request(struct fm10k_intfc *interface,
0644                  u32 vid, u8 vsi, bool set)
0645 {
0646     struct fm10k_macvlan_request *request;
0647     unsigned long flags;
0648 
0649     /* This must be atomic since we may be called while the netdev
0650      * addr_list_lock is held
0651      */
0652     request = kzalloc(sizeof(*request), GFP_ATOMIC);
0653     if (!request)
0654         return -ENOMEM;
0655 
0656     request->type = FM10K_VLAN_REQUEST;
0657     request->vlan.vid = vid;
0658     request->vlan.vsi = vsi;
0659     request->set = set;
0660 
0661     spin_lock_irqsave(&interface->macvlan_lock, flags);
0662     list_add_tail(&request->list, &interface->macvlan_requests);
0663     spin_unlock_irqrestore(&interface->macvlan_lock, flags);
0664 
0665     fm10k_macvlan_schedule(interface);
0666 
0667     return 0;
0668 }
0669 
0670 /**
0671  * fm10k_queue_mac_request - Queue a MAC update request
0672  * @interface: the fm10k interface structure
0673  * @glort: the target glort for this update
0674  * @addr: the address to update
0675  * @vid: the vid to update
0676  * @set: whether to add or remove
0677  *
0678  * This function queues up a MAC request for sending to the switch manager.
0679  * A separate thread monitors the queue and sends updates to the switch
0680  * manager. Return 0 on success, and negative error code on failure.
0681  **/
0682 int fm10k_queue_mac_request(struct fm10k_intfc *interface, u16 glort,
0683                 const unsigned char *addr, u16 vid, bool set)
0684 {
0685     struct fm10k_macvlan_request *request;
0686     unsigned long flags;
0687 
0688     /* This must be atomic since we may be called while the netdev
0689      * addr_list_lock is held
0690      */
0691     request = kzalloc(sizeof(*request), GFP_ATOMIC);
0692     if (!request)
0693         return -ENOMEM;
0694 
0695     if (is_multicast_ether_addr(addr))
0696         request->type = FM10K_MC_MAC_REQUEST;
0697     else
0698         request->type = FM10K_UC_MAC_REQUEST;
0699 
0700     ether_addr_copy(request->mac.addr, addr);
0701     request->mac.glort = glort;
0702     request->mac.vid = vid;
0703     request->set = set;
0704 
0705     spin_lock_irqsave(&interface->macvlan_lock, flags);
0706     list_add_tail(&request->list, &interface->macvlan_requests);
0707     spin_unlock_irqrestore(&interface->macvlan_lock, flags);
0708 
0709     fm10k_macvlan_schedule(interface);
0710 
0711     return 0;
0712 }
0713 
0714 /**
0715  * fm10k_clear_macvlan_queue - Cancel pending updates for a given glort
0716  * @interface: the fm10k interface structure
0717  * @glort: the target glort to clear
0718  * @vlans: true to clear VLAN messages, false to ignore them
0719  *
0720  * Cancel any outstanding MAC/VLAN requests for a given glort. This is
0721  * expected to be called when a logical port goes down.
0722  **/
0723 void fm10k_clear_macvlan_queue(struct fm10k_intfc *interface,
0724                    u16 glort, bool vlans)
0725 
0726 {
0727     struct fm10k_macvlan_request *r, *tmp;
0728     unsigned long flags;
0729 
0730     spin_lock_irqsave(&interface->macvlan_lock, flags);
0731 
0732     /* Free any outstanding MAC/VLAN requests for this interface */
0733     list_for_each_entry_safe(r, tmp, &interface->macvlan_requests, list) {
0734         switch (r->type) {
0735         case FM10K_MC_MAC_REQUEST:
0736         case FM10K_UC_MAC_REQUEST:
0737             /* Don't free requests for other interfaces */
0738             if (r->mac.glort != glort)
0739                 break;
0740             fallthrough;
0741         case FM10K_VLAN_REQUEST:
0742             if (vlans) {
0743                 list_del(&r->list);
0744                 kfree(r);
0745             }
0746             break;
0747         }
0748     }
0749 
0750     spin_unlock_irqrestore(&interface->macvlan_lock, flags);
0751 }
0752 
0753 static int fm10k_uc_vlan_unsync(struct net_device *netdev,
0754                 const unsigned char *uc_addr)
0755 {
0756     struct fm10k_intfc *interface = netdev_priv(netdev);
0757     u16 glort = interface->glort;
0758     u16 vid = interface->vid;
0759     bool set = !!(vid / VLAN_N_VID);
0760     int err;
0761 
0762     /* drop any leading bits on the VLAN ID */
0763     vid &= VLAN_N_VID - 1;
0764 
0765     err = fm10k_queue_mac_request(interface, glort, uc_addr, vid, set);
0766     if (err)
0767         return err;
0768 
0769     /* return non-zero value as we are only doing a partial sync/unsync */
0770     return 1;
0771 }
0772 
0773 static int fm10k_mc_vlan_unsync(struct net_device *netdev,
0774                 const unsigned char *mc_addr)
0775 {
0776     struct fm10k_intfc *interface = netdev_priv(netdev);
0777     u16 glort = interface->glort;
0778     u16 vid = interface->vid;
0779     bool set = !!(vid / VLAN_N_VID);
0780     int err;
0781 
0782     /* drop any leading bits on the VLAN ID */
0783     vid &= VLAN_N_VID - 1;
0784 
0785     err = fm10k_queue_mac_request(interface, glort, mc_addr, vid, set);
0786     if (err)
0787         return err;
0788 
0789     /* return non-zero value as we are only doing a partial sync/unsync */
0790     return 1;
0791 }
0792 
0793 static int fm10k_update_vid(struct net_device *netdev, u16 vid, bool set)
0794 {
0795     struct fm10k_intfc *interface = netdev_priv(netdev);
0796     struct fm10k_l2_accel *l2_accel = interface->l2_accel;
0797     struct fm10k_hw *hw = &interface->hw;
0798     u16 glort;
0799     s32 err;
0800     int i;
0801 
0802     /* updates do not apply to VLAN 0 */
0803     if (!vid)
0804         return 0;
0805 
0806     if (vid >= VLAN_N_VID)
0807         return -EINVAL;
0808 
0809     /* Verify that we have permission to add VLANs. If this is a request
0810      * to remove a VLAN, we still want to allow the user to remove the
0811      * VLAN device. In that case, we need to clear the bit in the
0812      * active_vlans bitmask.
0813      */
0814     if (set && hw->mac.vlan_override)
0815         return -EACCES;
0816 
0817     /* update active_vlans bitmask */
0818     set_bit(vid, interface->active_vlans);
0819     if (!set)
0820         clear_bit(vid, interface->active_vlans);
0821 
0822     /* disable the default VLAN ID on ring if we have an active VLAN */
0823     for (i = 0; i < interface->num_rx_queues; i++) {
0824         struct fm10k_ring *rx_ring = interface->rx_ring[i];
0825         u16 rx_vid = rx_ring->vid & (VLAN_N_VID - 1);
0826 
0827         if (test_bit(rx_vid, interface->active_vlans))
0828             rx_ring->vid |= FM10K_VLAN_CLEAR;
0829         else
0830             rx_ring->vid &= ~FM10K_VLAN_CLEAR;
0831     }
0832 
0833     /* If our VLAN has been overridden, there is no reason to send VLAN
0834      * removal requests as they will be silently ignored.
0835      */
0836     if (hw->mac.vlan_override)
0837         return 0;
0838 
0839     /* Do not remove default VLAN ID related entries from VLAN and MAC
0840      * tables
0841      */
0842     if (!set && vid == hw->mac.default_vid)
0843         return 0;
0844 
0845     /* Do not throw an error if the interface is down. We will sync once
0846      * we come up
0847      */
0848     if (test_bit(__FM10K_DOWN, interface->state))
0849         return 0;
0850 
0851     fm10k_mbx_lock(interface);
0852 
0853     /* only need to update the VLAN if not in promiscuous mode */
0854     if (!(netdev->flags & IFF_PROMISC)) {
0855         err = fm10k_queue_vlan_request(interface, vid, 0, set);
0856         if (err)
0857             goto err_out;
0858     }
0859 
0860     /* Update our base MAC address */
0861     err = fm10k_queue_mac_request(interface, interface->glort,
0862                       hw->mac.addr, vid, set);
0863     if (err)
0864         goto err_out;
0865 
0866     /* Update L2 accelerated macvlan addresses */
0867     if (l2_accel) {
0868         for (i = 0; i < l2_accel->size; i++) {
0869             struct net_device *sdev = l2_accel->macvlan[i];
0870 
0871             if (!sdev)
0872                 continue;
0873 
0874             glort = l2_accel->dglort + 1 + i;
0875 
0876             fm10k_queue_mac_request(interface, glort,
0877                         sdev->dev_addr,
0878                         vid, set);
0879         }
0880     }
0881 
0882     /* set VLAN ID prior to syncing/unsyncing the VLAN */
0883     interface->vid = vid + (set ? VLAN_N_VID : 0);
0884 
0885     /* Update the unicast and multicast address list to add/drop VLAN */
0886     __dev_uc_unsync(netdev, fm10k_uc_vlan_unsync);
0887     __dev_mc_unsync(netdev, fm10k_mc_vlan_unsync);
0888 
0889 err_out:
0890     fm10k_mbx_unlock(interface);
0891 
0892     return err;
0893 }
0894 
0895 static int fm10k_vlan_rx_add_vid(struct net_device *netdev,
0896                  __always_unused __be16 proto, u16 vid)
0897 {
0898     /* update VLAN and address table based on changes */
0899     return fm10k_update_vid(netdev, vid, true);
0900 }
0901 
0902 static int fm10k_vlan_rx_kill_vid(struct net_device *netdev,
0903                   __always_unused __be16 proto, u16 vid)
0904 {
0905     /* update VLAN and address table based on changes */
0906     return fm10k_update_vid(netdev, vid, false);
0907 }
0908 
0909 static u16 fm10k_find_next_vlan(struct fm10k_intfc *interface, u16 vid)
0910 {
0911     struct fm10k_hw *hw = &interface->hw;
0912     u16 default_vid = hw->mac.default_vid;
0913     u16 vid_limit = vid < default_vid ? default_vid : VLAN_N_VID;
0914 
0915     vid = find_next_bit(interface->active_vlans, vid_limit, ++vid);
0916 
0917     return vid;
0918 }
0919 
0920 static void fm10k_clear_unused_vlans(struct fm10k_intfc *interface)
0921 {
0922     u32 vid, prev_vid;
0923 
0924     /* loop through and find any gaps in the table */
0925     for (vid = 0, prev_vid = 0;
0926          prev_vid < VLAN_N_VID;
0927          prev_vid = vid + 1, vid = fm10k_find_next_vlan(interface, vid)) {
0928         if (prev_vid == vid)
0929             continue;
0930 
0931         /* send request to clear multiple bits at a time */
0932         prev_vid += (vid - prev_vid - 1) << FM10K_VLAN_LENGTH_SHIFT;
0933         fm10k_queue_vlan_request(interface, prev_vid, 0, false);
0934     }
0935 }
0936 
0937 static int __fm10k_uc_sync(struct net_device *dev,
0938                const unsigned char *addr, bool sync)
0939 {
0940     struct fm10k_intfc *interface = netdev_priv(dev);
0941     u16 vid, glort = interface->glort;
0942     s32 err;
0943 
0944     if (!is_valid_ether_addr(addr))
0945         return -EADDRNOTAVAIL;
0946 
0947     for (vid = fm10k_find_next_vlan(interface, 0);
0948          vid < VLAN_N_VID;
0949          vid = fm10k_find_next_vlan(interface, vid)) {
0950         err = fm10k_queue_mac_request(interface, glort,
0951                           addr, vid, sync);
0952         if (err)
0953             return err;
0954     }
0955 
0956     return 0;
0957 }
0958 
0959 static int fm10k_uc_sync(struct net_device *dev,
0960              const unsigned char *addr)
0961 {
0962     return __fm10k_uc_sync(dev, addr, true);
0963 }
0964 
0965 static int fm10k_uc_unsync(struct net_device *dev,
0966                const unsigned char *addr)
0967 {
0968     return __fm10k_uc_sync(dev, addr, false);
0969 }
0970 
0971 static int fm10k_set_mac(struct net_device *dev, void *p)
0972 {
0973     struct fm10k_intfc *interface = netdev_priv(dev);
0974     struct fm10k_hw *hw = &interface->hw;
0975     struct sockaddr *addr = p;
0976     s32 err = 0;
0977 
0978     if (!is_valid_ether_addr(addr->sa_data))
0979         return -EADDRNOTAVAIL;
0980 
0981     if (dev->flags & IFF_UP) {
0982         /* setting MAC address requires mailbox */
0983         fm10k_mbx_lock(interface);
0984 
0985         err = fm10k_uc_sync(dev, addr->sa_data);
0986         if (!err)
0987             fm10k_uc_unsync(dev, hw->mac.addr);
0988 
0989         fm10k_mbx_unlock(interface);
0990     }
0991 
0992     if (!err) {
0993         eth_hw_addr_set(dev, addr->sa_data);
0994         ether_addr_copy(hw->mac.addr, addr->sa_data);
0995         dev->addr_assign_type &= ~NET_ADDR_RANDOM;
0996     }
0997 
0998     /* if we had a mailbox error suggest trying again */
0999     return err ? -EAGAIN : 0;
1000 }
1001 
1002 static int __fm10k_mc_sync(struct net_device *dev,
1003                const unsigned char *addr, bool sync)
1004 {
1005     struct fm10k_intfc *interface = netdev_priv(dev);
1006     u16 vid, glort = interface->glort;
1007     s32 err;
1008 
1009     if (!is_multicast_ether_addr(addr))
1010         return -EADDRNOTAVAIL;
1011 
1012     for (vid = fm10k_find_next_vlan(interface, 0);
1013          vid < VLAN_N_VID;
1014          vid = fm10k_find_next_vlan(interface, vid)) {
1015         err = fm10k_queue_mac_request(interface, glort,
1016                           addr, vid, sync);
1017         if (err)
1018             return err;
1019     }
1020 
1021     return 0;
1022 }
1023 
1024 static int fm10k_mc_sync(struct net_device *dev,
1025              const unsigned char *addr)
1026 {
1027     return __fm10k_mc_sync(dev, addr, true);
1028 }
1029 
1030 static int fm10k_mc_unsync(struct net_device *dev,
1031                const unsigned char *addr)
1032 {
1033     return __fm10k_mc_sync(dev, addr, false);
1034 }
1035 
1036 static void fm10k_set_rx_mode(struct net_device *dev)
1037 {
1038     struct fm10k_intfc *interface = netdev_priv(dev);
1039     struct fm10k_hw *hw = &interface->hw;
1040     int xcast_mode;
1041 
1042     /* no need to update the harwdare if we are not running */
1043     if (!(dev->flags & IFF_UP))
1044         return;
1045 
1046     /* determine new mode based on flags */
1047     xcast_mode = (dev->flags & IFF_PROMISC) ? FM10K_XCAST_MODE_PROMISC :
1048              (dev->flags & IFF_ALLMULTI) ? FM10K_XCAST_MODE_ALLMULTI :
1049              (dev->flags & (IFF_BROADCAST | IFF_MULTICAST)) ?
1050              FM10K_XCAST_MODE_MULTI : FM10K_XCAST_MODE_NONE;
1051 
1052     fm10k_mbx_lock(interface);
1053 
1054     /* update xcast mode first, but only if it changed */
1055     if (interface->xcast_mode != xcast_mode) {
1056         /* update VLAN table when entering promiscuous mode */
1057         if (xcast_mode == FM10K_XCAST_MODE_PROMISC)
1058             fm10k_queue_vlan_request(interface, FM10K_VLAN_ALL,
1059                          0, true);
1060 
1061         /* clear VLAN table when exiting promiscuous mode */
1062         if (interface->xcast_mode == FM10K_XCAST_MODE_PROMISC)
1063             fm10k_clear_unused_vlans(interface);
1064 
1065         /* update xcast mode if host's mailbox is ready */
1066         if (fm10k_host_mbx_ready(interface))
1067             hw->mac.ops.update_xcast_mode(hw, interface->glort,
1068                               xcast_mode);
1069 
1070         /* record updated xcast mode state */
1071         interface->xcast_mode = xcast_mode;
1072     }
1073 
1074     /* synchronize all of the addresses */
1075     __dev_uc_sync(dev, fm10k_uc_sync, fm10k_uc_unsync);
1076     __dev_mc_sync(dev, fm10k_mc_sync, fm10k_mc_unsync);
1077 
1078     fm10k_mbx_unlock(interface);
1079 }
1080 
1081 void fm10k_restore_rx_state(struct fm10k_intfc *interface)
1082 {
1083     struct fm10k_l2_accel *l2_accel = interface->l2_accel;
1084     struct net_device *netdev = interface->netdev;
1085     struct fm10k_hw *hw = &interface->hw;
1086     int xcast_mode, i;
1087     u16 vid, glort;
1088 
1089     /* record glort for this interface */
1090     glort = interface->glort;
1091 
1092     /* convert interface flags to xcast mode */
1093     if (netdev->flags & IFF_PROMISC)
1094         xcast_mode = FM10K_XCAST_MODE_PROMISC;
1095     else if (netdev->flags & IFF_ALLMULTI)
1096         xcast_mode = FM10K_XCAST_MODE_ALLMULTI;
1097     else if (netdev->flags & (IFF_BROADCAST | IFF_MULTICAST))
1098         xcast_mode = FM10K_XCAST_MODE_MULTI;
1099     else
1100         xcast_mode = FM10K_XCAST_MODE_NONE;
1101 
1102     fm10k_mbx_lock(interface);
1103 
1104     /* Enable logical port if host's mailbox is ready */
1105     if (fm10k_host_mbx_ready(interface))
1106         hw->mac.ops.update_lport_state(hw, glort,
1107                            interface->glort_count, true);
1108 
1109     /* update VLAN table */
1110     fm10k_queue_vlan_request(interface, FM10K_VLAN_ALL, 0,
1111                  xcast_mode == FM10K_XCAST_MODE_PROMISC);
1112 
1113     /* update table with current entries */
1114     for (vid = fm10k_find_next_vlan(interface, 0);
1115          vid < VLAN_N_VID;
1116          vid = fm10k_find_next_vlan(interface, vid)) {
1117         fm10k_queue_vlan_request(interface, vid, 0, true);
1118 
1119         fm10k_queue_mac_request(interface, glort,
1120                     hw->mac.addr, vid, true);
1121 
1122         /* synchronize macvlan addresses */
1123         if (l2_accel) {
1124             for (i = 0; i < l2_accel->size; i++) {
1125                 struct net_device *sdev = l2_accel->macvlan[i];
1126 
1127                 if (!sdev)
1128                     continue;
1129 
1130                 glort = l2_accel->dglort + 1 + i;
1131 
1132                 fm10k_queue_mac_request(interface, glort,
1133                             sdev->dev_addr,
1134                             vid, true);
1135             }
1136         }
1137     }
1138 
1139     /* update xcast mode before synchronizing addresses if host's mailbox
1140      * is ready
1141      */
1142     if (fm10k_host_mbx_ready(interface))
1143         hw->mac.ops.update_xcast_mode(hw, glort, xcast_mode);
1144 
1145     /* synchronize all of the addresses */
1146     __dev_uc_sync(netdev, fm10k_uc_sync, fm10k_uc_unsync);
1147     __dev_mc_sync(netdev, fm10k_mc_sync, fm10k_mc_unsync);
1148 
1149     /* synchronize macvlan addresses */
1150     if (l2_accel) {
1151         for (i = 0; i < l2_accel->size; i++) {
1152             struct net_device *sdev = l2_accel->macvlan[i];
1153 
1154             if (!sdev)
1155                 continue;
1156 
1157             glort = l2_accel->dglort + 1 + i;
1158 
1159             hw->mac.ops.update_xcast_mode(hw, glort,
1160                               FM10K_XCAST_MODE_NONE);
1161             fm10k_queue_mac_request(interface, glort,
1162                         sdev->dev_addr,
1163                         hw->mac.default_vid, true);
1164         }
1165     }
1166 
1167     fm10k_mbx_unlock(interface);
1168 
1169     /* record updated xcast mode state */
1170     interface->xcast_mode = xcast_mode;
1171 
1172     /* Restore tunnel configuration */
1173     fm10k_restore_udp_port_info(interface);
1174 }
1175 
1176 void fm10k_reset_rx_state(struct fm10k_intfc *interface)
1177 {
1178     struct net_device *netdev = interface->netdev;
1179     struct fm10k_hw *hw = &interface->hw;
1180 
1181     /* Wait for MAC/VLAN work to finish */
1182     while (test_bit(__FM10K_MACVLAN_SCHED, interface->state))
1183         usleep_range(1000, 2000);
1184 
1185     /* Cancel pending MAC/VLAN requests */
1186     fm10k_clear_macvlan_queue(interface, interface->glort, true);
1187 
1188     fm10k_mbx_lock(interface);
1189 
1190     /* clear the logical port state on lower device if host's mailbox is
1191      * ready
1192      */
1193     if (fm10k_host_mbx_ready(interface))
1194         hw->mac.ops.update_lport_state(hw, interface->glort,
1195                            interface->glort_count, false);
1196 
1197     fm10k_mbx_unlock(interface);
1198 
1199     /* reset flags to default state */
1200     interface->xcast_mode = FM10K_XCAST_MODE_NONE;
1201 
1202     /* clear the sync flag since the lport has been dropped */
1203     __dev_uc_unsync(netdev, NULL);
1204     __dev_mc_unsync(netdev, NULL);
1205 }
1206 
1207 /**
1208  * fm10k_get_stats64 - Get System Network Statistics
1209  * @netdev: network interface device structure
1210  * @stats: storage space for 64bit statistics
1211  *
1212  * Obtain 64bit statistics in a way that is safe for both 32bit and 64bit
1213  * architectures.
1214  */
1215 static void fm10k_get_stats64(struct net_device *netdev,
1216                   struct rtnl_link_stats64 *stats)
1217 {
1218     struct fm10k_intfc *interface = netdev_priv(netdev);
1219     struct fm10k_ring *ring;
1220     unsigned int start, i;
1221     u64 bytes, packets;
1222 
1223     rcu_read_lock();
1224 
1225     for (i = 0; i < interface->num_rx_queues; i++) {
1226         ring = READ_ONCE(interface->rx_ring[i]);
1227 
1228         if (!ring)
1229             continue;
1230 
1231         do {
1232             start = u64_stats_fetch_begin_irq(&ring->syncp);
1233             packets = ring->stats.packets;
1234             bytes   = ring->stats.bytes;
1235         } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
1236 
1237         stats->rx_packets += packets;
1238         stats->rx_bytes   += bytes;
1239     }
1240 
1241     for (i = 0; i < interface->num_tx_queues; i++) {
1242         ring = READ_ONCE(interface->tx_ring[i]);
1243 
1244         if (!ring)
1245             continue;
1246 
1247         do {
1248             start = u64_stats_fetch_begin_irq(&ring->syncp);
1249             packets = ring->stats.packets;
1250             bytes   = ring->stats.bytes;
1251         } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
1252 
1253         stats->tx_packets += packets;
1254         stats->tx_bytes   += bytes;
1255     }
1256 
1257     rcu_read_unlock();
1258 
1259     /* following stats updated by fm10k_service_task() */
1260     stats->rx_missed_errors = netdev->stats.rx_missed_errors;
1261 }
1262 
1263 int fm10k_setup_tc(struct net_device *dev, u8 tc)
1264 {
1265     struct fm10k_intfc *interface = netdev_priv(dev);
1266     int err;
1267 
1268     /* Currently only the PF supports priority classes */
1269     if (tc && (interface->hw.mac.type != fm10k_mac_pf))
1270         return -EINVAL;
1271 
1272     /* Hardware supports up to 8 traffic classes */
1273     if (tc > 8)
1274         return -EINVAL;
1275 
1276     /* Hardware has to reinitialize queues to match packet
1277      * buffer alignment. Unfortunately, the hardware is not
1278      * flexible enough to do this dynamically.
1279      */
1280     if (netif_running(dev))
1281         fm10k_close(dev);
1282 
1283     fm10k_mbx_free_irq(interface);
1284 
1285     fm10k_clear_queueing_scheme(interface);
1286 
1287     /* we expect the prio_tc map to be repopulated later */
1288     netdev_reset_tc(dev);
1289     netdev_set_num_tc(dev, tc);
1290 
1291     err = fm10k_init_queueing_scheme(interface);
1292     if (err)
1293         goto err_queueing_scheme;
1294 
1295     err = fm10k_mbx_request_irq(interface);
1296     if (err)
1297         goto err_mbx_irq;
1298 
1299     err = netif_running(dev) ? fm10k_open(dev) : 0;
1300     if (err)
1301         goto err_open;
1302 
1303     /* flag to indicate SWPRI has yet to be updated */
1304     set_bit(FM10K_FLAG_SWPRI_CONFIG, interface->flags);
1305 
1306     return 0;
1307 err_open:
1308     fm10k_mbx_free_irq(interface);
1309 err_mbx_irq:
1310     fm10k_clear_queueing_scheme(interface);
1311 err_queueing_scheme:
1312     netif_device_detach(dev);
1313 
1314     return err;
1315 }
1316 
1317 static int __fm10k_setup_tc(struct net_device *dev, enum tc_setup_type type,
1318                 void *type_data)
1319 {
1320     struct tc_mqprio_qopt *mqprio = type_data;
1321 
1322     if (type != TC_SETUP_QDISC_MQPRIO)
1323         return -EOPNOTSUPP;
1324 
1325     mqprio->hw = TC_MQPRIO_HW_OFFLOAD_TCS;
1326 
1327     return fm10k_setup_tc(dev, mqprio->num_tc);
1328 }
1329 
1330 static void fm10k_assign_l2_accel(struct fm10k_intfc *interface,
1331                   struct fm10k_l2_accel *l2_accel)
1332 {
1333     int i;
1334 
1335     for (i = 0; i < interface->num_rx_queues; i++) {
1336         struct fm10k_ring *ring = interface->rx_ring[i];
1337 
1338         rcu_assign_pointer(ring->l2_accel, l2_accel);
1339     }
1340 
1341     interface->l2_accel = l2_accel;
1342 }
1343 
1344 static void *fm10k_dfwd_add_station(struct net_device *dev,
1345                     struct net_device *sdev)
1346 {
1347     struct fm10k_intfc *interface = netdev_priv(dev);
1348     struct fm10k_l2_accel *l2_accel = interface->l2_accel;
1349     struct fm10k_l2_accel *old_l2_accel = NULL;
1350     struct fm10k_dglort_cfg dglort = { 0 };
1351     struct fm10k_hw *hw = &interface->hw;
1352     int size, i;
1353     u16 vid, glort;
1354 
1355     /* The hardware supported by fm10k only filters on the destination MAC
1356      * address. In order to avoid issues we only support offloading modes
1357      * where the hardware can actually provide the functionality.
1358      */
1359     if (!macvlan_supports_dest_filter(sdev))
1360         return ERR_PTR(-EMEDIUMTYPE);
1361 
1362     /* allocate l2 accel structure if it is not available */
1363     if (!l2_accel) {
1364         /* verify there is enough free GLORTs to support l2_accel */
1365         if (interface->glort_count < 7)
1366             return ERR_PTR(-EBUSY);
1367 
1368         size = offsetof(struct fm10k_l2_accel, macvlan[7]);
1369         l2_accel = kzalloc(size, GFP_KERNEL);
1370         if (!l2_accel)
1371             return ERR_PTR(-ENOMEM);
1372 
1373         l2_accel->size = 7;
1374         l2_accel->dglort = interface->glort;
1375 
1376         /* update pointers */
1377         fm10k_assign_l2_accel(interface, l2_accel);
1378     /* do not expand if we are at our limit */
1379     } else if ((l2_accel->count == FM10K_MAX_STATIONS) ||
1380            (l2_accel->count == (interface->glort_count - 1))) {
1381         return ERR_PTR(-EBUSY);
1382     /* expand if we have hit the size limit */
1383     } else if (l2_accel->count == l2_accel->size) {
1384         old_l2_accel = l2_accel;
1385         size = offsetof(struct fm10k_l2_accel,
1386                 macvlan[(l2_accel->size * 2) + 1]);
1387         l2_accel = kzalloc(size, GFP_KERNEL);
1388         if (!l2_accel)
1389             return ERR_PTR(-ENOMEM);
1390 
1391         memcpy(l2_accel, old_l2_accel,
1392                offsetof(struct fm10k_l2_accel,
1393                 macvlan[old_l2_accel->size]));
1394 
1395         l2_accel->size = (old_l2_accel->size * 2) + 1;
1396 
1397         /* update pointers */
1398         fm10k_assign_l2_accel(interface, l2_accel);
1399         kfree_rcu(old_l2_accel, rcu);
1400     }
1401 
1402     /* add macvlan to accel table, and record GLORT for position */
1403     for (i = 0; i < l2_accel->size; i++) {
1404         if (!l2_accel->macvlan[i])
1405             break;
1406     }
1407 
1408     /* record station */
1409     l2_accel->macvlan[i] = sdev;
1410     l2_accel->count++;
1411 
1412     /* configure default DGLORT mapping for RSS/DCB */
1413     dglort.idx = fm10k_dglort_pf_rss;
1414     dglort.inner_rss = 1;
1415     dglort.rss_l = fls(interface->ring_feature[RING_F_RSS].mask);
1416     dglort.pc_l = fls(interface->ring_feature[RING_F_QOS].mask);
1417     dglort.glort = interface->glort;
1418     dglort.shared_l = fls(l2_accel->size);
1419     hw->mac.ops.configure_dglort_map(hw, &dglort);
1420 
1421     /* Add rules for this specific dglort to the switch */
1422     fm10k_mbx_lock(interface);
1423 
1424     glort = l2_accel->dglort + 1 + i;
1425 
1426     if (fm10k_host_mbx_ready(interface))
1427         hw->mac.ops.update_xcast_mode(hw, glort,
1428                           FM10K_XCAST_MODE_NONE);
1429 
1430     fm10k_queue_mac_request(interface, glort, sdev->dev_addr,
1431                 hw->mac.default_vid, true);
1432 
1433     for (vid = fm10k_find_next_vlan(interface, 0);
1434          vid < VLAN_N_VID;
1435          vid = fm10k_find_next_vlan(interface, vid))
1436         fm10k_queue_mac_request(interface, glort, sdev->dev_addr,
1437                     vid, true);
1438 
1439     fm10k_mbx_unlock(interface);
1440 
1441     return sdev;
1442 }
1443 
1444 static void fm10k_dfwd_del_station(struct net_device *dev, void *priv)
1445 {
1446     struct fm10k_intfc *interface = netdev_priv(dev);
1447     struct fm10k_l2_accel *l2_accel = READ_ONCE(interface->l2_accel);
1448     struct fm10k_dglort_cfg dglort = { 0 };
1449     struct fm10k_hw *hw = &interface->hw;
1450     struct net_device *sdev = priv;
1451     u16 vid, glort;
1452     int i;
1453 
1454     if (!l2_accel)
1455         return;
1456 
1457     /* search table for matching interface */
1458     for (i = 0; i < l2_accel->size; i++) {
1459         if (l2_accel->macvlan[i] == sdev)
1460             break;
1461     }
1462 
1463     /* exit if macvlan not found */
1464     if (i == l2_accel->size)
1465         return;
1466 
1467     /* Remove any rules specific to this dglort */
1468     fm10k_mbx_lock(interface);
1469 
1470     glort = l2_accel->dglort + 1 + i;
1471 
1472     if (fm10k_host_mbx_ready(interface))
1473         hw->mac.ops.update_xcast_mode(hw, glort,
1474                           FM10K_XCAST_MODE_NONE);
1475 
1476     fm10k_queue_mac_request(interface, glort, sdev->dev_addr,
1477                 hw->mac.default_vid, false);
1478 
1479     for (vid = fm10k_find_next_vlan(interface, 0);
1480          vid < VLAN_N_VID;
1481          vid = fm10k_find_next_vlan(interface, vid))
1482         fm10k_queue_mac_request(interface, glort, sdev->dev_addr,
1483                     vid, false);
1484 
1485     fm10k_mbx_unlock(interface);
1486 
1487     /* record removal */
1488     l2_accel->macvlan[i] = NULL;
1489     l2_accel->count--;
1490 
1491     /* configure default DGLORT mapping for RSS/DCB */
1492     dglort.idx = fm10k_dglort_pf_rss;
1493     dglort.inner_rss = 1;
1494     dglort.rss_l = fls(interface->ring_feature[RING_F_RSS].mask);
1495     dglort.pc_l = fls(interface->ring_feature[RING_F_QOS].mask);
1496     dglort.glort = interface->glort;
1497     dglort.shared_l = fls(l2_accel->size);
1498     hw->mac.ops.configure_dglort_map(hw, &dglort);
1499 
1500     /* If table is empty remove it */
1501     if (l2_accel->count == 0) {
1502         fm10k_assign_l2_accel(interface, NULL);
1503         kfree_rcu(l2_accel, rcu);
1504     }
1505 }
1506 
1507 static netdev_features_t fm10k_features_check(struct sk_buff *skb,
1508                           struct net_device *dev,
1509                           netdev_features_t features)
1510 {
1511     if (!skb->encapsulation || fm10k_tx_encap_offload(skb))
1512         return features;
1513 
1514     return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
1515 }
1516 
1517 static const struct net_device_ops fm10k_netdev_ops = {
1518     .ndo_open       = fm10k_open,
1519     .ndo_stop       = fm10k_close,
1520     .ndo_validate_addr  = eth_validate_addr,
1521     .ndo_start_xmit     = fm10k_xmit_frame,
1522     .ndo_set_mac_address    = fm10k_set_mac,
1523     .ndo_tx_timeout     = fm10k_tx_timeout,
1524     .ndo_vlan_rx_add_vid    = fm10k_vlan_rx_add_vid,
1525     .ndo_vlan_rx_kill_vid   = fm10k_vlan_rx_kill_vid,
1526     .ndo_set_rx_mode    = fm10k_set_rx_mode,
1527     .ndo_get_stats64    = fm10k_get_stats64,
1528     .ndo_setup_tc       = __fm10k_setup_tc,
1529     .ndo_set_vf_mac     = fm10k_ndo_set_vf_mac,
1530     .ndo_set_vf_vlan    = fm10k_ndo_set_vf_vlan,
1531     .ndo_set_vf_rate    = fm10k_ndo_set_vf_bw,
1532     .ndo_get_vf_config  = fm10k_ndo_get_vf_config,
1533     .ndo_get_vf_stats   = fm10k_ndo_get_vf_stats,
1534     .ndo_dfwd_add_station   = fm10k_dfwd_add_station,
1535     .ndo_dfwd_del_station   = fm10k_dfwd_del_station,
1536     .ndo_features_check = fm10k_features_check,
1537 };
1538 
1539 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
1540 
1541 struct net_device *fm10k_alloc_netdev(const struct fm10k_info *info)
1542 {
1543     netdev_features_t hw_features;
1544     struct fm10k_intfc *interface;
1545     struct net_device *dev;
1546 
1547     dev = alloc_etherdev_mq(sizeof(struct fm10k_intfc), MAX_QUEUES);
1548     if (!dev)
1549         return NULL;
1550 
1551     /* set net device and ethtool ops */
1552     dev->netdev_ops = &fm10k_netdev_ops;
1553     fm10k_set_ethtool_ops(dev);
1554 
1555     /* configure default debug level */
1556     interface = netdev_priv(dev);
1557     interface->msg_enable = BIT(DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
1558 
1559     /* configure default features */
1560     dev->features |= NETIF_F_IP_CSUM |
1561              NETIF_F_IPV6_CSUM |
1562              NETIF_F_SG |
1563              NETIF_F_TSO |
1564              NETIF_F_TSO6 |
1565              NETIF_F_TSO_ECN |
1566              NETIF_F_RXHASH |
1567              NETIF_F_RXCSUM;
1568 
1569     /* Only the PF can support VXLAN and NVGRE tunnel offloads */
1570     if (info->mac == fm10k_mac_pf) {
1571         dev->hw_enc_features = NETIF_F_IP_CSUM |
1572                        NETIF_F_TSO |
1573                        NETIF_F_TSO6 |
1574                        NETIF_F_TSO_ECN |
1575                        NETIF_F_GSO_UDP_TUNNEL |
1576                        NETIF_F_IPV6_CSUM |
1577                        NETIF_F_SG;
1578 
1579         dev->features |= NETIF_F_GSO_UDP_TUNNEL;
1580 
1581         dev->udp_tunnel_nic_info = &fm10k_udp_tunnels;
1582     }
1583 
1584     /* all features defined to this point should be changeable */
1585     hw_features = dev->features;
1586 
1587     /* allow user to enable L2 forwarding acceleration */
1588     hw_features |= NETIF_F_HW_L2FW_DOFFLOAD;
1589 
1590     /* configure VLAN features */
1591     dev->vlan_features |= dev->features;
1592 
1593     /* we want to leave these both on as we cannot disable VLAN tag
1594      * insertion or stripping on the hardware since it is contained
1595      * in the FTAG and not in the frame itself.
1596      */
1597     dev->features |= NETIF_F_HW_VLAN_CTAG_TX |
1598              NETIF_F_HW_VLAN_CTAG_RX |
1599              NETIF_F_HW_VLAN_CTAG_FILTER;
1600 
1601     dev->priv_flags |= IFF_UNICAST_FLT;
1602 
1603     dev->hw_features |= hw_features;
1604 
1605     /* MTU range: 68 - 15342 */
1606     dev->min_mtu = ETH_MIN_MTU;
1607     dev->max_mtu = FM10K_MAX_JUMBO_FRAME_SIZE;
1608 
1609     return dev;
1610 }
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