OSCL-LXR linux-6.0.1/​drivers/​net/​ethernet/​rocker/​rocker_main.c	Source navigation Diff markup Identifier search General search
	Version: linux-6.0.1 spark-3.0.0 hadoop-3.2.0-src hadoop-3.3.0-src spark-2.4.7 linux-4.15.13 hadoop-2.7.4-src Revert   Change

 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * drivers/net/ethernet/rocker/rocker.c - Rocker switch device driver
  * Copyright (c) 2014-2016 Jiri Pirko <jiri@mellanox.com>
  * Copyright (c) 2014 Scott Feldman <sfeldma@gmail.com>
  */
 
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/pci.h>
 #include <linux/interrupt.h>
 #include <linux/sched.h>
 #include <linux/wait.h>
 #include <linux/spinlock.h>
 #include <linux/sort.h>
 #include <linux/random.h>
 #include <linux/netdevice.h>
 #include <linux/skbuff.h>
 #include <linux/socket.h>
 #include <linux/etherdevice.h>
 #include <linux/ethtool.h>
 #include <linux/if_ether.h>
 #include <linux/if_vlan.h>
 #include <linux/if_bridge.h>
 #include <linux/bitops.h>
 #include <linux/ctype.h>
 #include <linux/workqueue.h>
 #include <net/switchdev.h>
 #include <net/rtnetlink.h>
 #include <net/netevent.h>
 #include <net/arp.h>
 #include <net/fib_rules.h>
 #include <net/fib_notifier.h>
 #include <linux/io-64-nonatomic-lo-hi.h>
 #include <generated/utsrelease.h>
 
 #include "rocker_hw.h"
 #include "rocker.h"
 #include "rocker_tlv.h"
 
 static const char rocker_driver_name[] = "rocker";
 
 static const struct pci_device_id rocker_pci_id_table[] = {
     {PCI_VDEVICE(REDHAT, PCI_DEVICE_ID_REDHAT_ROCKER), 0},
     {0, }
 };
 
 struct rocker_wait {
     wait_queue_head_t wait;
     bool done;
     bool nowait;
 };
 
 static void rocker_wait_reset(struct rocker_wait *wait)
 {
     wait->done = false;
     wait->nowait = false;
 }
 
 static void rocker_wait_init(struct rocker_wait *wait)
 {
     init_waitqueue_head(&wait->wait);
     rocker_wait_reset(wait);
 }
 
 static struct rocker_wait *rocker_wait_create(void)
 {
     struct rocker_wait *wait;
 
     wait = kzalloc(sizeof(*wait), GFP_KERNEL);
     if (!wait)
         return NULL;
     return wait;
 }
 
 static void rocker_wait_destroy(struct rocker_wait *wait)
 {
     kfree(wait);
 }
 
 static bool rocker_wait_event_timeout(struct rocker_wait *wait,
                       unsigned long timeout)
 {
     wait_event_timeout(wait->wait, wait->done, HZ / 10);
     if (!wait->done)
         return false;
     return true;
 }
 
 static void rocker_wait_wake_up(struct rocker_wait *wait)
 {
     wait->done = true;
     wake_up(&wait->wait);
 }
 
 static u32 rocker_msix_vector(const struct rocker *rocker, unsigned int vector)
 {
     return rocker->msix_entries[vector].vector;
 }
 
 static u32 rocker_msix_tx_vector(const struct rocker_port *rocker_port)
 {
     return rocker_msix_vector(rocker_port->rocker,
                   ROCKER_MSIX_VEC_TX(rocker_port->port_number));
 }
 
 static u32 rocker_msix_rx_vector(const struct rocker_port *rocker_port)
 {
     return rocker_msix_vector(rocker_port->rocker,
                   ROCKER_MSIX_VEC_RX(rocker_port->port_number));
 }
 
 #define rocker_write32(rocker, reg, val)    \
     writel((val), (rocker)->hw_addr + (ROCKER_ ## reg))
 #define rocker_read32(rocker, reg)  \
     readl((rocker)->hw_addr + (ROCKER_ ## reg))
 #define rocker_write64(rocker, reg, val)    \
     writeq((val), (rocker)->hw_addr + (ROCKER_ ## reg))
 #define rocker_read64(rocker, reg)  \
     readq((rocker)->hw_addr + (ROCKER_ ## reg))
 
 /*****************************
  * HW basic testing functions
  *****************************/
 
 static int rocker_reg_test(const struct rocker *rocker)
 {
     const struct pci_dev *pdev = rocker->pdev;
     u64 test_reg;
     u64 rnd;
 
     rnd = prandom_u32();
     rnd >>= 1;
     rocker_write32(rocker, TEST_REG, rnd);
     test_reg = rocker_read32(rocker, TEST_REG);
     if (test_reg != rnd * 2) {
         dev_err(&pdev->dev, "unexpected 32bit register value %08llx, expected %08llx\n",
             test_reg, rnd * 2);
         return -EIO;
     }
 
     rnd = prandom_u32();
     rnd <<= 31;
     rnd |= prandom_u32();
     rocker_write64(rocker, TEST_REG64, rnd);
     test_reg = rocker_read64(rocker, TEST_REG64);
     if (test_reg != rnd * 2) {
         dev_err(&pdev->dev, "unexpected 64bit register value %16llx, expected %16llx\n",
             test_reg, rnd * 2);
         return -EIO;
     }
 
     return 0;
 }
 
 static int rocker_dma_test_one(const struct rocker *rocker,
                    struct rocker_wait *wait, u32 test_type,
                    dma_addr_t dma_handle, const unsigned char *buf,
                    const unsigned char *expect, size_t size)
 {
     const struct pci_dev *pdev = rocker->pdev;
     int i;
 
     rocker_wait_reset(wait);
     rocker_write32(rocker, TEST_DMA_CTRL, test_type);
 
     if (!rocker_wait_event_timeout(wait, HZ / 10)) {
         dev_err(&pdev->dev, "no interrupt received within a timeout\n");
         return -EIO;
     }
 
     for (i = 0; i < size; i++) {
         if (buf[i] != expect[i]) {
             dev_err(&pdev->dev, "unexpected memory content %02x at byte %x\n, %02x expected",
                 buf[i], i, expect[i]);
             return -EIO;
         }
     }
     return 0;
 }
 
 #define ROCKER_TEST_DMA_BUF_SIZE (PAGE_SIZE * 4)
 #define ROCKER_TEST_DMA_FILL_PATTERN 0x96
 
 static int rocker_dma_test_offset(const struct rocker *rocker,
                   struct rocker_wait *wait, int offset)
 {
     struct pci_dev *pdev = rocker->pdev;
     unsigned char *alloc;
     unsigned char *buf;
     unsigned char *expect;
     dma_addr_t dma_handle;
     int i;
     int err;
 
     alloc = kzalloc(ROCKER_TEST_DMA_BUF_SIZE * 2 + offset,
             GFP_KERNEL | GFP_DMA);
     if (!alloc)
         return -ENOMEM;
     buf = alloc + offset;
     expect = buf + ROCKER_TEST_DMA_BUF_SIZE;
 
     dma_handle = dma_map_single(&pdev->dev, buf, ROCKER_TEST_DMA_BUF_SIZE,
                     DMA_BIDIRECTIONAL);
     if (dma_mapping_error(&pdev->dev, dma_handle)) {
         err = -EIO;
         goto free_alloc;
     }
 
     rocker_write64(rocker, TEST_DMA_ADDR, dma_handle);
     rocker_write32(rocker, TEST_DMA_SIZE, ROCKER_TEST_DMA_BUF_SIZE);
 
     memset(expect, ROCKER_TEST_DMA_FILL_PATTERN, ROCKER_TEST_DMA_BUF_SIZE);
     err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_FILL,
                   dma_handle, buf, expect,
                   ROCKER_TEST_DMA_BUF_SIZE);
     if (err)
         goto unmap;
 
     memset(expect, 0, ROCKER_TEST_DMA_BUF_SIZE);
     err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_CLEAR,
                   dma_handle, buf, expect,
                   ROCKER_TEST_DMA_BUF_SIZE);
     if (err)
         goto unmap;
 
     prandom_bytes(buf, ROCKER_TEST_DMA_BUF_SIZE);
     for (i = 0; i < ROCKER_TEST_DMA_BUF_SIZE; i++)
         expect[i] = ~buf[i];
     err = rocker_dma_test_one(rocker, wait, ROCKER_TEST_DMA_CTRL_INVERT,
                   dma_handle, buf, expect,
                   ROCKER_TEST_DMA_BUF_SIZE);
     if (err)
         goto unmap;
 
 unmap:
     dma_unmap_single(&pdev->dev, dma_handle, ROCKER_TEST_DMA_BUF_SIZE,
              DMA_BIDIRECTIONAL);
 free_alloc:
     kfree(alloc);
 
     return err;
 }
 
 static int rocker_dma_test(const struct rocker *rocker,
                struct rocker_wait *wait)
 {
     int i;
     int err;
 
     for (i = 0; i < 8; i++) {
         err = rocker_dma_test_offset(rocker, wait, i);
         if (err)
             return err;
     }
     return 0;
 }
 
 static irqreturn_t rocker_test_irq_handler(int irq, void *dev_id)
 {
     struct rocker_wait *wait = dev_id;
 
     rocker_wait_wake_up(wait);
 
     return IRQ_HANDLED;
 }
 
 static int rocker_basic_hw_test(const struct rocker *rocker)
 {
     const struct pci_dev *pdev = rocker->pdev;
     struct rocker_wait wait;
     int err;
 
     err = rocker_reg_test(rocker);
     if (err) {
         dev_err(&pdev->dev, "reg test failed\n");
         return err;
     }
 
     err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_TEST),
               rocker_test_irq_handler, 0,
               rocker_driver_name, &wait);
     if (err) {
         dev_err(&pdev->dev, "cannot assign test irq\n");
         return err;
     }
 
     rocker_wait_init(&wait);
     rocker_write32(rocker, TEST_IRQ, ROCKER_MSIX_VEC_TEST);
 
     if (!rocker_wait_event_timeout(&wait, HZ / 10)) {
         dev_err(&pdev->dev, "no interrupt received within a timeout\n");
         err = -EIO;
         goto free_irq;
     }
 
     err = rocker_dma_test(rocker, &wait);
     if (err)
         dev_err(&pdev->dev, "dma test failed\n");
 
 free_irq:
     free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_TEST), &wait);
     return err;
 }
 
 /******************************************
  * DMA rings and descriptors manipulations
  ******************************************/
 
 static u32 __pos_inc(u32 pos, size_t limit)
 {
     return ++pos == limit ? 0 : pos;
 }
 
 static int rocker_desc_err(const struct rocker_desc_info *desc_info)
 {
     int err = desc_info->desc->comp_err & ~ROCKER_DMA_DESC_COMP_ERR_GEN;
 
     switch (err) {
     case ROCKER_OK:
         return 0;
     case -ROCKER_ENOENT:
         return -ENOENT;
     case -ROCKER_ENXIO:
         return -ENXIO;
     case -ROCKER_ENOMEM:
         return -ENOMEM;
     case -ROCKER_EEXIST:
         return -EEXIST;
     case -ROCKER_EINVAL:
         return -EINVAL;
     case -ROCKER_EMSGSIZE:
         return -EMSGSIZE;
     case -ROCKER_ENOTSUP:
         return -EOPNOTSUPP;
     case -ROCKER_ENOBUFS:
         return -ENOBUFS;
     }
 
     return -EINVAL;
 }
 
 static void rocker_desc_gen_clear(const struct rocker_desc_info *desc_info)
 {
     desc_info->desc->comp_err &= ~ROCKER_DMA_DESC_COMP_ERR_GEN;
 }
 
 static bool rocker_desc_gen(const struct rocker_desc_info *desc_info)
 {
     u32 comp_err = desc_info->desc->comp_err;
 
     return comp_err & ROCKER_DMA_DESC_COMP_ERR_GEN ? true : false;
 }
 
 static void *
 rocker_desc_cookie_ptr_get(const struct rocker_desc_info *desc_info)
 {
     return (void *)(uintptr_t)desc_info->desc->cookie;
 }
 
 static void rocker_desc_cookie_ptr_set(const struct rocker_desc_info *desc_info,
                        void *ptr)
 {
     desc_info->desc->cookie = (uintptr_t) ptr;
 }
 
 static struct rocker_desc_info *
 rocker_desc_head_get(const struct rocker_dma_ring_info *info)
 {
     struct rocker_desc_info *desc_info;
     u32 head = __pos_inc(info->head, info->size);
 
     desc_info = &info->desc_info[info->head];
     if (head == info->tail)
         return NULL; /* ring full */
     desc_info->tlv_size = 0;
     return desc_info;
 }
 
 static void rocker_desc_commit(const struct rocker_desc_info *desc_info)
 {
     desc_info->desc->buf_size = desc_info->data_size;
     desc_info->desc->tlv_size = desc_info->tlv_size;
 }
 
 static void rocker_desc_head_set(const struct rocker *rocker,
                  struct rocker_dma_ring_info *info,
                  const struct rocker_desc_info *desc_info)
 {
     u32 head = __pos_inc(info->head, info->size);
 
     BUG_ON(head == info->tail);
     rocker_desc_commit(desc_info);
     info->head = head;
     rocker_write32(rocker, DMA_DESC_HEAD(info->type), head);
 }
 
 static struct rocker_desc_info *
 rocker_desc_tail_get(struct rocker_dma_ring_info *info)
 {
     struct rocker_desc_info *desc_info;
 
     if (info->tail == info->head)
         return NULL; /* nothing to be done between head and tail */
     desc_info = &info->desc_info[info->tail];
     if (!rocker_desc_gen(desc_info))
         return NULL; /* gen bit not set, desc is not ready yet */
     info->tail = __pos_inc(info->tail, info->size);
     desc_info->tlv_size = desc_info->desc->tlv_size;
     return desc_info;
 }
 
 static void rocker_dma_ring_credits_set(const struct rocker *rocker,
                     const struct rocker_dma_ring_info *info,
                     u32 credits)
 {
     if (credits)
         rocker_write32(rocker, DMA_DESC_CREDITS(info->type), credits);
 }
 
 static unsigned long rocker_dma_ring_size_fix(size_t size)
 {
     return max(ROCKER_DMA_SIZE_MIN,
            min(roundup_pow_of_two(size), ROCKER_DMA_SIZE_MAX));
 }
 
 static int rocker_dma_ring_create(const struct rocker *rocker,
                   unsigned int type,
                   size_t size,
                   struct rocker_dma_ring_info *info)
 {
     int i;
 
     BUG_ON(size != rocker_dma_ring_size_fix(size));
     info->size = size;
     info->type = type;
     info->head = 0;
     info->tail = 0;
     info->desc_info = kcalloc(info->size, sizeof(*info->desc_info),
                   GFP_KERNEL);
     if (!info->desc_info)
         return -ENOMEM;
 
     info->desc = dma_alloc_coherent(&rocker->pdev->dev,
                     info->size * sizeof(*info->desc),
                     &info->mapaddr, GFP_KERNEL);
     if (!info->desc) {
         kfree(info->desc_info);
         return -ENOMEM;
     }
 
     for (i = 0; i < info->size; i++)
         info->desc_info[i].desc = &info->desc[i];
 
     rocker_write32(rocker, DMA_DESC_CTRL(info->type),
                ROCKER_DMA_DESC_CTRL_RESET);
     rocker_write64(rocker, DMA_DESC_ADDR(info->type), info->mapaddr);
     rocker_write32(rocker, DMA_DESC_SIZE(info->type), info->size);
 
     return 0;
 }
 
 static void rocker_dma_ring_destroy(const struct rocker *rocker,
                     const struct rocker_dma_ring_info *info)
 {
     rocker_write64(rocker, DMA_DESC_ADDR(info->type), 0);
 
     dma_free_coherent(&rocker->pdev->dev,
               info->size * sizeof(struct rocker_desc), info->desc,
               info->mapaddr);
     kfree(info->desc_info);
 }
 
 static void rocker_dma_ring_pass_to_producer(const struct rocker *rocker,
                          struct rocker_dma_ring_info *info)
 {
     int i;
 
     BUG_ON(info->head || info->tail);
 
     /* When ring is consumer, we need to advance head for each desc.
      * That tells hw that the desc is ready to be used by it.
      */
     for (i = 0; i < info->size - 1; i++)
         rocker_desc_head_set(rocker, info, &info->desc_info[i]);
     rocker_desc_commit(&info->desc_info[i]);
 }
 
 static int rocker_dma_ring_bufs_alloc(const struct rocker *rocker,
                       const struct rocker_dma_ring_info *info,
                       int direction, size_t buf_size)
 {
     struct pci_dev *pdev = rocker->pdev;
     int i;
     int err;
 
     for (i = 0; i < info->size; i++) {
         struct rocker_desc_info *desc_info = &info->desc_info[i];
         struct rocker_desc *desc = &info->desc[i];
         dma_addr_t dma_handle;
         char *buf;
 
         buf = kzalloc(buf_size, GFP_KERNEL | GFP_DMA);
         if (!buf) {
             err = -ENOMEM;
             goto rollback;
         }
 
         dma_handle = dma_map_single(&pdev->dev, buf, buf_size,
                         direction);
         if (dma_mapping_error(&pdev->dev, dma_handle)) {
             kfree(buf);
             err = -EIO;
             goto rollback;
         }
 
         desc_info->data = buf;
         desc_info->data_size = buf_size;
         dma_unmap_addr_set(desc_info, mapaddr, dma_handle);
 
         desc->buf_addr = dma_handle;
         desc->buf_size = buf_size;
     }
     return 0;
 
 rollback:
     for (i--; i >= 0; i--) {
         const struct rocker_desc_info *desc_info = &info->desc_info[i];
 
         dma_unmap_single(&pdev->dev,
                  dma_unmap_addr(desc_info, mapaddr),
                  desc_info->data_size, direction);
         kfree(desc_info->data);
     }
     return err;
 }
 
 static void rocker_dma_ring_bufs_free(const struct rocker *rocker,
                       const struct rocker_dma_ring_info *info,
                       int direction)
 {
     struct pci_dev *pdev = rocker->pdev;
     int i;
 
     for (i = 0; i < info->size; i++) {
         const struct rocker_desc_info *desc_info = &info->desc_info[i];
         struct rocker_desc *desc = &info->desc[i];
 
         desc->buf_addr = 0;
         desc->buf_size = 0;
         dma_unmap_single(&pdev->dev,
                  dma_unmap_addr(desc_info, mapaddr),
                  desc_info->data_size, direction);
         kfree(desc_info->data);
     }
 }
 
 static int rocker_dma_cmd_ring_wait_alloc(struct rocker_desc_info *desc_info)
 {
     struct rocker_wait *wait;
 
     wait = rocker_wait_create();
     if (!wait)
         return -ENOMEM;
     rocker_desc_cookie_ptr_set(desc_info, wait);
     return 0;
 }
 
 static void
 rocker_dma_cmd_ring_wait_free(const struct rocker_desc_info *desc_info)
 {
     struct rocker_wait *wait = rocker_desc_cookie_ptr_get(desc_info);
 
     rocker_wait_destroy(wait);
 }
 
 static int rocker_dma_cmd_ring_waits_alloc(const struct rocker *rocker)
 {
     const struct rocker_dma_ring_info *cmd_ring = &rocker->cmd_ring;
     int i;
     int err;
 
     for (i = 0; i < cmd_ring->size; i++) {
         err = rocker_dma_cmd_ring_wait_alloc(&cmd_ring->desc_info[i]);
         if (err)
             goto rollback;
     }
     return 0;
 
 rollback:
     for (i--; i >= 0; i--)
         rocker_dma_cmd_ring_wait_free(&cmd_ring->desc_info[i]);
     return err;
 }
 
 static void rocker_dma_cmd_ring_waits_free(const struct rocker *rocker)
 {
     const struct rocker_dma_ring_info *cmd_ring = &rocker->cmd_ring;
     int i;
 
     for (i = 0; i < cmd_ring->size; i++)
         rocker_dma_cmd_ring_wait_free(&cmd_ring->desc_info[i]);
 }
 
 static int rocker_dma_rings_init(struct rocker *rocker)
 {
     const struct pci_dev *pdev = rocker->pdev;
     int err;
 
     err = rocker_dma_ring_create(rocker, ROCKER_DMA_CMD,
                      ROCKER_DMA_CMD_DEFAULT_SIZE,
                      &rocker->cmd_ring);
     if (err) {
         dev_err(&pdev->dev, "failed to create command dma ring\n");
         return err;
     }
 
     spin_lock_init(&rocker->cmd_ring_lock);
 
     err = rocker_dma_ring_bufs_alloc(rocker, &rocker->cmd_ring,
                      DMA_BIDIRECTIONAL, PAGE_SIZE);
     if (err) {
         dev_err(&pdev->dev, "failed to alloc command dma ring buffers\n");
         goto err_dma_cmd_ring_bufs_alloc;
     }
 
     err = rocker_dma_cmd_ring_waits_alloc(rocker);
     if (err) {
         dev_err(&pdev->dev, "failed to alloc command dma ring waits\n");
         goto err_dma_cmd_ring_waits_alloc;
     }
 
     err = rocker_dma_ring_create(rocker, ROCKER_DMA_EVENT,
                      ROCKER_DMA_EVENT_DEFAULT_SIZE,
                      &rocker->event_ring);
     if (err) {
         dev_err(&pdev->dev, "failed to create event dma ring\n");
         goto err_dma_event_ring_create;
     }
 
     err = rocker_dma_ring_bufs_alloc(rocker, &rocker->event_ring,
                      DMA_FROM_DEVICE, PAGE_SIZE);
     if (err) {
         dev_err(&pdev->dev, "failed to alloc event dma ring buffers\n");
         goto err_dma_event_ring_bufs_alloc;
     }
     rocker_dma_ring_pass_to_producer(rocker, &rocker->event_ring);
     return 0;
 
 err_dma_event_ring_bufs_alloc:
     rocker_dma_ring_destroy(rocker, &rocker->event_ring);
 err_dma_event_ring_create:
     rocker_dma_cmd_ring_waits_free(rocker);
 err_dma_cmd_ring_waits_alloc:
     rocker_dma_ring_bufs_free(rocker, &rocker->cmd_ring,
                   DMA_BIDIRECTIONAL);
 err_dma_cmd_ring_bufs_alloc:
     rocker_dma_ring_destroy(rocker, &rocker->cmd_ring);
     return err;
 }
 
 static void rocker_dma_rings_fini(struct rocker *rocker)
 {
     rocker_dma_ring_bufs_free(rocker, &rocker->event_ring,
                   DMA_BIDIRECTIONAL);
     rocker_dma_ring_destroy(rocker, &rocker->event_ring);
     rocker_dma_cmd_ring_waits_free(rocker);
     rocker_dma_ring_bufs_free(rocker, &rocker->cmd_ring,
                   DMA_BIDIRECTIONAL);
     rocker_dma_ring_destroy(rocker, &rocker->cmd_ring);
 }
 
 static int rocker_dma_rx_ring_skb_map(const struct rocker_port *rocker_port,
                       struct rocker_desc_info *desc_info,
                       struct sk_buff *skb, size_t buf_len)
 {
     const struct rocker *rocker = rocker_port->rocker;
     struct pci_dev *pdev = rocker->pdev;
     dma_addr_t dma_handle;
 
     dma_handle = dma_map_single(&pdev->dev, skb->data, buf_len,
                     DMA_FROM_DEVICE);
     if (dma_mapping_error(&pdev->dev, dma_handle))
         return -EIO;
     if (rocker_tlv_put_u64(desc_info, ROCKER_TLV_RX_FRAG_ADDR, dma_handle))
         goto tlv_put_failure;
     if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_RX_FRAG_MAX_LEN, buf_len))
         goto tlv_put_failure;
     return 0;
 
 tlv_put_failure:
     dma_unmap_single(&pdev->dev, dma_handle, buf_len, DMA_FROM_DEVICE);
     desc_info->tlv_size = 0;
     return -EMSGSIZE;
 }
 
 static size_t rocker_port_rx_buf_len(const struct rocker_port *rocker_port)
 {
     return rocker_port->dev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 }
 
 static int rocker_dma_rx_ring_skb_alloc(const struct rocker_port *rocker_port,
                     struct rocker_desc_info *desc_info)
 {
     struct net_device *dev = rocker_port->dev;
     struct sk_buff *skb;
     size_t buf_len = rocker_port_rx_buf_len(rocker_port);
     int err;
 
     /* Ensure that hw will see tlv_size zero in case of an error.
      * That tells hw to use another descriptor.
      */
     rocker_desc_cookie_ptr_set(desc_info, NULL);
     desc_info->tlv_size = 0;
 
     skb = netdev_alloc_skb_ip_align(dev, buf_len);
     if (!skb)
         return -ENOMEM;
     err = rocker_dma_rx_ring_skb_map(rocker_port, desc_info, skb, buf_len);
     if (err) {
         dev_kfree_skb_any(skb);
         return err;
     }
     rocker_desc_cookie_ptr_set(desc_info, skb);
     return 0;
 }
 
 static void rocker_dma_rx_ring_skb_unmap(const struct rocker *rocker,
                      const struct rocker_tlv **attrs)
 {
     struct pci_dev *pdev = rocker->pdev;
     dma_addr_t dma_handle;
     size_t len;
 
     if (!attrs[ROCKER_TLV_RX_FRAG_ADDR] ||
         !attrs[ROCKER_TLV_RX_FRAG_MAX_LEN])
         return;
     dma_handle = rocker_tlv_get_u64(attrs[ROCKER_TLV_RX_FRAG_ADDR]);
     len = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FRAG_MAX_LEN]);
     dma_unmap_single(&pdev->dev, dma_handle, len, DMA_FROM_DEVICE);
 }
 
 static void rocker_dma_rx_ring_skb_free(const struct rocker *rocker,
                     const struct rocker_desc_info *desc_info)
 {
     const struct rocker_tlv *attrs[ROCKER_TLV_RX_MAX + 1];
     struct sk_buff *skb = rocker_desc_cookie_ptr_get(desc_info);
 
     if (!skb)
         return;
     rocker_tlv_parse_desc(attrs, ROCKER_TLV_RX_MAX, desc_info);
     rocker_dma_rx_ring_skb_unmap(rocker, attrs);
     dev_kfree_skb_any(skb);
 }
 
 static int rocker_dma_rx_ring_skbs_alloc(const struct rocker_port *rocker_port)
 {
     const struct rocker_dma_ring_info *rx_ring = &rocker_port->rx_ring;
     const struct rocker *rocker = rocker_port->rocker;
     int i;
     int err;
 
     for (i = 0; i < rx_ring->size; i++) {
         err = rocker_dma_rx_ring_skb_alloc(rocker_port,
                            &rx_ring->desc_info[i]);
         if (err)
             goto rollback;
     }
     return 0;
 
 rollback:
     for (i--; i >= 0; i--)
         rocker_dma_rx_ring_skb_free(rocker, &rx_ring->desc_info[i]);
     return err;
 }
 
 static void rocker_dma_rx_ring_skbs_free(const struct rocker_port *rocker_port)
 {
     const struct rocker_dma_ring_info *rx_ring = &rocker_port->rx_ring;
     const struct rocker *rocker = rocker_port->rocker;
     int i;
 
     for (i = 0; i < rx_ring->size; i++)
         rocker_dma_rx_ring_skb_free(rocker, &rx_ring->desc_info[i]);
 }
 
 static int rocker_port_dma_rings_init(struct rocker_port *rocker_port)
 {
     struct rocker *rocker = rocker_port->rocker;
     int err;
 
     err = rocker_dma_ring_create(rocker,
                      ROCKER_DMA_TX(rocker_port->port_number),
                      ROCKER_DMA_TX_DEFAULT_SIZE,
                      &rocker_port->tx_ring);
     if (err) {
         netdev_err(rocker_port->dev, "failed to create tx dma ring\n");
         return err;
     }
 
     err = rocker_dma_ring_bufs_alloc(rocker, &rocker_port->tx_ring,
                      DMA_TO_DEVICE,
                      ROCKER_DMA_TX_DESC_SIZE);
     if (err) {
         netdev_err(rocker_port->dev, "failed to alloc tx dma ring buffers\n");
         goto err_dma_tx_ring_bufs_alloc;
     }
 
     err = rocker_dma_ring_create(rocker,
                      ROCKER_DMA_RX(rocker_port->port_number),
                      ROCKER_DMA_RX_DEFAULT_SIZE,
                      &rocker_port->rx_ring);
     if (err) {
         netdev_err(rocker_port->dev, "failed to create rx dma ring\n");
         goto err_dma_rx_ring_create;
     }
 
     err = rocker_dma_ring_bufs_alloc(rocker, &rocker_port->rx_ring,
                      DMA_BIDIRECTIONAL,
                      ROCKER_DMA_RX_DESC_SIZE);
     if (err) {
         netdev_err(rocker_port->dev, "failed to alloc rx dma ring buffers\n");
         goto err_dma_rx_ring_bufs_alloc;
     }
 
     err = rocker_dma_rx_ring_skbs_alloc(rocker_port);
     if (err) {
         netdev_err(rocker_port->dev, "failed to alloc rx dma ring skbs\n");
         goto err_dma_rx_ring_skbs_alloc;
     }
     rocker_dma_ring_pass_to_producer(rocker, &rocker_port->rx_ring);
 
     return 0;
 
 err_dma_rx_ring_skbs_alloc:
     rocker_dma_ring_bufs_free(rocker, &rocker_port->rx_ring,
                   DMA_BIDIRECTIONAL);
 err_dma_rx_ring_bufs_alloc:
     rocker_dma_ring_destroy(rocker, &rocker_port->rx_ring);
 err_dma_rx_ring_create:
     rocker_dma_ring_bufs_free(rocker, &rocker_port->tx_ring,
                   DMA_TO_DEVICE);
 err_dma_tx_ring_bufs_alloc:
     rocker_dma_ring_destroy(rocker, &rocker_port->tx_ring);
     return err;
 }
 
 static void rocker_port_dma_rings_fini(struct rocker_port *rocker_port)
 {
     struct rocker *rocker = rocker_port->rocker;
 
     rocker_dma_rx_ring_skbs_free(rocker_port);
     rocker_dma_ring_bufs_free(rocker, &rocker_port->rx_ring,
                   DMA_BIDIRECTIONAL);
     rocker_dma_ring_destroy(rocker, &rocker_port->rx_ring);
     rocker_dma_ring_bufs_free(rocker, &rocker_port->tx_ring,
                   DMA_TO_DEVICE);
     rocker_dma_ring_destroy(rocker, &rocker_port->tx_ring);
 }
 
 static void rocker_port_set_enable(const struct rocker_port *rocker_port,
                    bool enable)
 {
     u64 val = rocker_read64(rocker_port->rocker, PORT_PHYS_ENABLE);
 
     if (enable)
         val |= 1ULL << rocker_port->pport;
     else
         val &= ~(1ULL << rocker_port->pport);
     rocker_write64(rocker_port->rocker, PORT_PHYS_ENABLE, val);
 }
 
 /********************************
  * Interrupt handler and helpers
  ********************************/
 
 static irqreturn_t rocker_cmd_irq_handler(int irq, void *dev_id)
 {
     struct rocker *rocker = dev_id;
     const struct rocker_desc_info *desc_info;
     struct rocker_wait *wait;
     u32 credits = 0;
 
     spin_lock(&rocker->cmd_ring_lock);
     while ((desc_info = rocker_desc_tail_get(&rocker->cmd_ring))) {
         wait = rocker_desc_cookie_ptr_get(desc_info);
         if (wait->nowait) {
             rocker_desc_gen_clear(desc_info);
         } else {
             rocker_wait_wake_up(wait);
         }
         credits++;
     }
     spin_unlock(&rocker->cmd_ring_lock);
     rocker_dma_ring_credits_set(rocker, &rocker->cmd_ring, credits);
 
     return IRQ_HANDLED;
 }
 
 static void rocker_port_link_up(const struct rocker_port *rocker_port)
 {
     netif_carrier_on(rocker_port->dev);
     netdev_info(rocker_port->dev, "Link is up\n");
 }
 
 static void rocker_port_link_down(const struct rocker_port *rocker_port)
 {
     netif_carrier_off(rocker_port->dev);
     netdev_info(rocker_port->dev, "Link is down\n");
 }
 
 static int rocker_event_link_change(const struct rocker *rocker,
                     const struct rocker_tlv *info)
 {
     const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_LINK_CHANGED_MAX + 1];
     unsigned int port_number;
     bool link_up;
     struct rocker_port *rocker_port;
 
     rocker_tlv_parse_nested(attrs, ROCKER_TLV_EVENT_LINK_CHANGED_MAX, info);
     if (!attrs[ROCKER_TLV_EVENT_LINK_CHANGED_PPORT] ||
         !attrs[ROCKER_TLV_EVENT_LINK_CHANGED_LINKUP])
         return -EIO;
     port_number =
         rocker_tlv_get_u32(attrs[ROCKER_TLV_EVENT_LINK_CHANGED_PPORT]) - 1;
     link_up = rocker_tlv_get_u8(attrs[ROCKER_TLV_EVENT_LINK_CHANGED_LINKUP]);
 
     if (port_number >= rocker->port_count)
         return -EINVAL;
 
     rocker_port = rocker->ports[port_number];
     if (netif_carrier_ok(rocker_port->dev) != link_up) {
         if (link_up)
             rocker_port_link_up(rocker_port);
         else
             rocker_port_link_down(rocker_port);
     }
 
     return 0;
 }
 
 static int rocker_world_port_ev_mac_vlan_seen(struct rocker_port *rocker_port,
                           const unsigned char *addr,
                           __be16 vlan_id);
 
 static int rocker_event_mac_vlan_seen(const struct rocker *rocker,
                       const struct rocker_tlv *info)
 {
     const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAX + 1];
     unsigned int port_number;
     struct rocker_port *rocker_port;
     const unsigned char *addr;
     __be16 vlan_id;
 
     rocker_tlv_parse_nested(attrs, ROCKER_TLV_EVENT_MAC_VLAN_MAX, info);
     if (!attrs[ROCKER_TLV_EVENT_MAC_VLAN_PPORT] ||
         !attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAC] ||
         !attrs[ROCKER_TLV_EVENT_MAC_VLAN_VLAN_ID])
         return -EIO;
     port_number =
         rocker_tlv_get_u32(attrs[ROCKER_TLV_EVENT_MAC_VLAN_PPORT]) - 1;
     addr = rocker_tlv_data(attrs[ROCKER_TLV_EVENT_MAC_VLAN_MAC]);
     vlan_id = rocker_tlv_get_be16(attrs[ROCKER_TLV_EVENT_MAC_VLAN_VLAN_ID]);
 
     if (port_number >= rocker->port_count)
         return -EINVAL;
 
     rocker_port = rocker->ports[port_number];
     return rocker_world_port_ev_mac_vlan_seen(rocker_port, addr, vlan_id);
 }
 
 static int rocker_event_process(const struct rocker *rocker,
                 const struct rocker_desc_info *desc_info)
 {
     const struct rocker_tlv *attrs[ROCKER_TLV_EVENT_MAX + 1];
     const struct rocker_tlv *info;
     u16 type;
 
     rocker_tlv_parse_desc(attrs, ROCKER_TLV_EVENT_MAX, desc_info);
     if (!attrs[ROCKER_TLV_EVENT_TYPE] ||
         !attrs[ROCKER_TLV_EVENT_INFO])
         return -EIO;
 
     type = rocker_tlv_get_u16(attrs[ROCKER_TLV_EVENT_TYPE]);
     info = attrs[ROCKER_TLV_EVENT_INFO];
 
     switch (type) {
     case ROCKER_TLV_EVENT_TYPE_LINK_CHANGED:
         return rocker_event_link_change(rocker, info);
     case ROCKER_TLV_EVENT_TYPE_MAC_VLAN_SEEN:
         return rocker_event_mac_vlan_seen(rocker, info);
     }
 
     return -EOPNOTSUPP;
 }
 
 static irqreturn_t rocker_event_irq_handler(int irq, void *dev_id)
 {
     struct rocker *rocker = dev_id;
     const struct pci_dev *pdev = rocker->pdev;
     const struct rocker_desc_info *desc_info;
     u32 credits = 0;
     int err;
 
     while ((desc_info = rocker_desc_tail_get(&rocker->event_ring))) {
         err = rocker_desc_err(desc_info);
         if (err) {
             dev_err(&pdev->dev, "event desc received with err %d\n",
                 err);
         } else {
             err = rocker_event_process(rocker, desc_info);
             if (err)
                 dev_err(&pdev->dev, "event processing failed with err %d\n",
                     err);
         }
         rocker_desc_gen_clear(desc_info);
         rocker_desc_head_set(rocker, &rocker->event_ring, desc_info);
         credits++;
     }
     rocker_dma_ring_credits_set(rocker, &rocker->event_ring, credits);
 
     return IRQ_HANDLED;
 }
 
 static irqreturn_t rocker_tx_irq_handler(int irq, void *dev_id)
 {
     struct rocker_port *rocker_port = dev_id;
 
     napi_schedule(&rocker_port->napi_tx);
     return IRQ_HANDLED;
 }
 
 static irqreturn_t rocker_rx_irq_handler(int irq, void *dev_id)
 {
     struct rocker_port *rocker_port = dev_id;
 
     napi_schedule(&rocker_port->napi_rx);
     return IRQ_HANDLED;
 }
 
 /********************
  * Command interface
  ********************/
 
 int rocker_cmd_exec(struct rocker_port *rocker_port, bool nowait,
             rocker_cmd_prep_cb_t prepare, void *prepare_priv,
             rocker_cmd_proc_cb_t process, void *process_priv)
 {
     struct rocker *rocker = rocker_port->rocker;
     struct rocker_desc_info *desc_info;
     struct rocker_wait *wait;
     unsigned long lock_flags;
     int err;
 
     spin_lock_irqsave(&rocker->cmd_ring_lock, lock_flags);
 
     desc_info = rocker_desc_head_get(&rocker->cmd_ring);
     if (!desc_info) {
         spin_unlock_irqrestore(&rocker->cmd_ring_lock, lock_flags);
         return -EAGAIN;
     }
 
     wait = rocker_desc_cookie_ptr_get(desc_info);
     rocker_wait_init(wait);
     wait->nowait = nowait;
 
     err = prepare(rocker_port, desc_info, prepare_priv);
     if (err) {
         spin_unlock_irqrestore(&rocker->cmd_ring_lock, lock_flags);
         return err;
     }
 
     rocker_desc_head_set(rocker, &rocker->cmd_ring, desc_info);
 
     spin_unlock_irqrestore(&rocker->cmd_ring_lock, lock_flags);
 
     if (nowait)
         return 0;
 
     if (!rocker_wait_event_timeout(wait, HZ / 10))
         return -EIO;
 
     err = rocker_desc_err(desc_info);
     if (err)
         return err;
 
     if (process)
         err = process(rocker_port, desc_info, process_priv);
 
     rocker_desc_gen_clear(desc_info);
     return err;
 }
 
 static int
 rocker_cmd_get_port_settings_prep(const struct rocker_port *rocker_port,
                   struct rocker_desc_info *desc_info,
                   void *priv)
 {
     struct rocker_tlv *cmd_info;
 
     if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
                    ROCKER_TLV_CMD_TYPE_GET_PORT_SETTINGS))
         return -EMSGSIZE;
     cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
     if (!cmd_info)
         return -EMSGSIZE;
     if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
                    rocker_port->pport))
         return -EMSGSIZE;
     rocker_tlv_nest_end(desc_info, cmd_info);
     return 0;
 }
 
 static int
 rocker_cmd_get_port_settings_ethtool_proc(const struct rocker_port *rocker_port,
                       const struct rocker_desc_info *desc_info,
                       void *priv)
 {
     struct ethtool_link_ksettings *ecmd = priv;
     const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
     const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
     u32 speed;
     u8 duplex;
     u8 autoneg;
 
     rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
     if (!attrs[ROCKER_TLV_CMD_INFO])
         return -EIO;
 
     rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
                 attrs[ROCKER_TLV_CMD_INFO]);
     if (!info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_SPEED] ||
         !info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX] ||
         !info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG])
         return -EIO;
 
     speed = rocker_tlv_get_u32(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_SPEED]);
     duplex = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX]);
     autoneg = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG]);
 
     ethtool_link_ksettings_zero_link_mode(ecmd, supported);
     ethtool_link_ksettings_add_link_mode(ecmd, supported, TP);
 
     ecmd->base.phy_address = 0xff;
     ecmd->base.port = PORT_TP;
     ecmd->base.speed = speed;
     ecmd->base.duplex = duplex ? DUPLEX_FULL : DUPLEX_HALF;
     ecmd->base.autoneg = autoneg ? AUTONEG_ENABLE : AUTONEG_DISABLE;
 
     return 0;
 }
 
 static int
 rocker_cmd_get_port_settings_macaddr_proc(const struct rocker_port *rocker_port,
                       const struct rocker_desc_info *desc_info,
                       void *priv)
 {
     unsigned char *macaddr = priv;
     const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
     const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
     const struct rocker_tlv *attr;
 
     rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
     if (!attrs[ROCKER_TLV_CMD_INFO])
         return -EIO;
 
     rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
                 attrs[ROCKER_TLV_CMD_INFO]);
     attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MACADDR];
     if (!attr)
         return -EIO;
 
     if (rocker_tlv_len(attr) != ETH_ALEN)
         return -EINVAL;
 
     ether_addr_copy(macaddr, rocker_tlv_data(attr));
     return 0;
 }
 
 static int
 rocker_cmd_get_port_settings_mode_proc(const struct rocker_port *rocker_port,
                        const struct rocker_desc_info *desc_info,
                        void *priv)
 {
     u8 *p_mode = priv;
     const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
     const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
     const struct rocker_tlv *attr;
 
     rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
     if (!attrs[ROCKER_TLV_CMD_INFO])
         return -EIO;
 
     rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
                 attrs[ROCKER_TLV_CMD_INFO]);
     attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MODE];
     if (!attr)
         return -EIO;
 
     *p_mode = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MODE]);
     return 0;
 }
 
 struct port_name {
     char *buf;
     size_t len;
 };
 
 static int
 rocker_cmd_get_port_settings_phys_name_proc(const struct rocker_port *rocker_port,
                         const struct rocker_desc_info *desc_info,
                         void *priv)
 {
     const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
     const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
     struct port_name *name = priv;
     const struct rocker_tlv *attr;
     size_t i, j, len;
     const char *str;
 
     rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
     if (!attrs[ROCKER_TLV_CMD_INFO])
         return -EIO;
 
     rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
                 attrs[ROCKER_TLV_CMD_INFO]);
     attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_PHYS_NAME];
     if (!attr)
         return -EIO;
 
     len = min_t(size_t, rocker_tlv_len(attr), name->len);
     str = rocker_tlv_data(attr);
 
     /* make sure name only contains alphanumeric characters */
     for (i = j = 0; i < len; ++i) {
         if (isalnum(str[i])) {
             name->buf[j] = str[i];
             j++;
         }
     }
 
     if (j == 0)
         return -EIO;
 
     name->buf[j] = '\0';
 
     return 0;
 }
 
 static int
 rocker_cmd_set_port_settings_ethtool_prep(const struct rocker_port *rocker_port,
                       struct rocker_desc_info *desc_info,
                       void *priv)
 {
     struct ethtool_link_ksettings *ecmd = priv;
     struct rocker_tlv *cmd_info;
 
     if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
                    ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
         return -EMSGSIZE;
     cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
     if (!cmd_info)
         return -EMSGSIZE;
     if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
                    rocker_port->pport))
         return -EMSGSIZE;
     if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_SPEED,
                    ecmd->base.speed))
         return -EMSGSIZE;
     if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_DUPLEX,
                   ecmd->base.duplex))
         return -EMSGSIZE;
     if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_AUTONEG,
                   ecmd->base.autoneg))
         return -EMSGSIZE;
     rocker_tlv_nest_end(desc_info, cmd_info);
     return 0;
 }
 
 static int
 rocker_cmd_set_port_settings_macaddr_prep(const struct rocker_port *rocker_port,
                       struct rocker_desc_info *desc_info,
                       void *priv)
 {
     const unsigned char *macaddr = priv;
     struct rocker_tlv *cmd_info;
 
     if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
                    ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
         return -EMSGSIZE;
     cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
     if (!cmd_info)
         return -EMSGSIZE;
     if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
                    rocker_port->pport))
         return -EMSGSIZE;
     if (rocker_tlv_put(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_MACADDR,
                ETH_ALEN, macaddr))
         return -EMSGSIZE;
     rocker_tlv_nest_end(desc_info, cmd_info);
     return 0;
 }
 
 static int
 rocker_cmd_set_port_settings_mtu_prep(const struct rocker_port *rocker_port,
                       struct rocker_desc_info *desc_info,
                       void *priv)
 {
     int mtu = *(int *)priv;
     struct rocker_tlv *cmd_info;
 
     if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
                    ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
         return -EMSGSIZE;
     cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
     if (!cmd_info)
         return -EMSGSIZE;
     if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
                    rocker_port->pport))
         return -EMSGSIZE;
     if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_MTU,
                    mtu))
         return -EMSGSIZE;
     rocker_tlv_nest_end(desc_info, cmd_info);
     return 0;
 }
 
 static int
 rocker_cmd_set_port_learning_prep(const struct rocker_port *rocker_port,
                   struct rocker_desc_info *desc_info,
                   void *priv)
 {
     bool learning = *(bool *)priv;
     struct rocker_tlv *cmd_info;
 
     if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
                    ROCKER_TLV_CMD_TYPE_SET_PORT_SETTINGS))
         return -EMSGSIZE;
     cmd_info = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
     if (!cmd_info)
         return -EMSGSIZE;
     if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_PPORT,
                    rocker_port->pport))
         return -EMSGSIZE;
     if (rocker_tlv_put_u8(desc_info, ROCKER_TLV_CMD_PORT_SETTINGS_LEARNING,
                   learning))
         return -EMSGSIZE;
     rocker_tlv_nest_end(desc_info, cmd_info);
     return 0;
 }
 
 static int
 rocker_cmd_get_port_settings_ethtool(struct rocker_port *rocker_port,
                      struct ethtool_link_ksettings *ecmd)
 {
     return rocker_cmd_exec(rocker_port, false,
                    rocker_cmd_get_port_settings_prep, NULL,
                    rocker_cmd_get_port_settings_ethtool_proc,
                    ecmd);
 }
 
 static int rocker_cmd_get_port_settings_macaddr(struct rocker_port *rocker_port,
                         unsigned char *macaddr)
 {
     return rocker_cmd_exec(rocker_port, false,
                    rocker_cmd_get_port_settings_prep, NULL,
                    rocker_cmd_get_port_settings_macaddr_proc,
                    macaddr);
 }
 
 static int rocker_cmd_get_port_settings_mode(struct rocker_port *rocker_port,
                          u8 *p_mode)
 {
     return rocker_cmd_exec(rocker_port, false,
                    rocker_cmd_get_port_settings_prep, NULL,
                    rocker_cmd_get_port_settings_mode_proc, p_mode);
 }
 
 static int
 rocker_cmd_set_port_settings_ethtool(struct rocker_port *rocker_port,
                      const struct ethtool_link_ksettings *ecmd)
 {
     struct ethtool_link_ksettings copy_ecmd;
 
     memcpy(&copy_ecmd, ecmd, sizeof(copy_ecmd));
 
     return rocker_cmd_exec(rocker_port, false,
                    rocker_cmd_set_port_settings_ethtool_prep,
                    &copy_ecmd, NULL, NULL);
 }
 
 static int rocker_cmd_set_port_settings_macaddr(struct rocker_port *rocker_port,
                         unsigned char *macaddr)
 {
     return rocker_cmd_exec(rocker_port, false,
                    rocker_cmd_set_port_settings_macaddr_prep,
                    macaddr, NULL, NULL);
 }
 
 static int rocker_cmd_set_port_settings_mtu(struct rocker_port *rocker_port,
                         int mtu)
 {
     return rocker_cmd_exec(rocker_port, false,
                    rocker_cmd_set_port_settings_mtu_prep,
                    &mtu, NULL, NULL);
 }
 
 int rocker_port_set_learning(struct rocker_port *rocker_port,
                  bool learning)
 {
     return rocker_cmd_exec(rocker_port, false,
                    rocker_cmd_set_port_learning_prep,
                    &learning, NULL, NULL);
 }
 
 /**********************
  * Worlds manipulation
  **********************/
 
 static struct rocker_world_ops *rocker_world_ops[] = {
     &rocker_ofdpa_ops,
 };
 
 #define ROCKER_WORLD_OPS_LEN ARRAY_SIZE(rocker_world_ops)
 
 static struct rocker_world_ops *rocker_world_ops_find(u8 mode)
 {
     int i;
 
     for (i = 0; i < ROCKER_WORLD_OPS_LEN; i++)
         if (rocker_world_ops[i]->mode == mode)
             return rocker_world_ops[i];
     return NULL;
 }
 
 static int rocker_world_init(struct rocker *rocker, u8 mode)
 {
     struct rocker_world_ops *wops;
     int err;
 
     wops = rocker_world_ops_find(mode);
     if (!wops) {
         dev_err(&rocker->pdev->dev, "port mode \"%d\" is not supported\n",
             mode);
         return -EINVAL;
     }
     rocker->wops = wops;
     rocker->wpriv = kzalloc(wops->priv_size, GFP_KERNEL);
     if (!rocker->wpriv)
         return -ENOMEM;
     if (!wops->init)
         return 0;
     err = wops->init(rocker);
     if (err)
         kfree(rocker->wpriv);
     return err;
 }
 
 static void rocker_world_fini(struct rocker *rocker)
 {
     struct rocker_world_ops *wops = rocker->wops;
 
     if (!wops || !wops->fini)
         return;
     wops->fini(rocker);
     kfree(rocker->wpriv);
 }
 
 static int rocker_world_check_init(struct rocker_port *rocker_port)
 {
     struct rocker *rocker = rocker_port->rocker;
     u8 mode;
     int err;
 
     err = rocker_cmd_get_port_settings_mode(rocker_port, &mode);
     if (err) {
         dev_err(&rocker->pdev->dev, "failed to get port mode\n");
         return err;
     }
     if (rocker->wops) {
         if (rocker->wops->mode != mode) {
             dev_err(&rocker->pdev->dev, "hardware has ports in different worlds, which is not supported\n");
             return -EINVAL;
         }
         return 0;
     }
     return rocker_world_init(rocker, mode);
 }
 
 static int rocker_world_port_pre_init(struct rocker_port *rocker_port)
 {
     struct rocker_world_ops *wops = rocker_port->rocker->wops;
     int err;
 
     rocker_port->wpriv = kzalloc(wops->port_priv_size, GFP_KERNEL);
     if (!rocker_port->wpriv)
         return -ENOMEM;
     if (!wops->port_pre_init)
         return 0;
     err = wops->port_pre_init(rocker_port);
     if (err)
         kfree(rocker_port->wpriv);
     return 0;
 }
 
 static int rocker_world_port_init(struct rocker_port *rocker_port)
 {
     struct rocker_world_ops *wops = rocker_port->rocker->wops;
 
     if (!wops->port_init)
         return 0;
     return wops->port_init(rocker_port);
 }
 
 static void rocker_world_port_fini(struct rocker_port *rocker_port)
 {
     struct rocker_world_ops *wops = rocker_port->rocker->wops;
 
     if (!wops->port_fini)
         return;
     wops->port_fini(rocker_port);
 }
 
 static void rocker_world_port_post_fini(struct rocker_port *rocker_port)
 {
     struct rocker_world_ops *wops = rocker_port->rocker->wops;
 
     if (!wops->port_post_fini)
         return;
     wops->port_post_fini(rocker_port);
     kfree(rocker_port->wpriv);
 }
 
 static int rocker_world_port_open(struct rocker_port *rocker_port)
 {
     struct rocker_world_ops *wops = rocker_port->rocker->wops;
 
     if (!wops->port_open)
         return 0;
     return wops->port_open(rocker_port);
 }
 
 static void rocker_world_port_stop(struct rocker_port *rocker_port)
 {
     struct rocker_world_ops *wops = rocker_port->rocker->wops;
 
     if (!wops->port_stop)
         return;
     wops->port_stop(rocker_port);
 }
 
 static int rocker_world_port_attr_stp_state_set(struct rocker_port *rocker_port,
                         u8 state)
 {
     struct rocker_world_ops *wops = rocker_port->rocker->wops;
 
     if (!wops->port_attr_stp_state_set)
         return -EOPNOTSUPP;
 
     return wops->port_attr_stp_state_set(rocker_port, state);
 }
 
 static int
 rocker_world_port_attr_bridge_flags_support_get(const struct rocker_port *
                         rocker_port,
                         unsigned long *
                         p_brport_flags_support)
 {
     struct rocker_world_ops *wops = rocker_port->rocker->wops;
 
     if (!wops->port_attr_bridge_flags_support_get)
         return -EOPNOTSUPP;
     return wops->port_attr_bridge_flags_support_get(rocker_port,
                             p_brport_flags_support);
 }
 
 static int
 rocker_world_port_attr_pre_bridge_flags_set(struct rocker_port *rocker_port,
                         struct switchdev_brport_flags flags)
 {
     struct rocker_world_ops *wops = rocker_port->rocker->wops;
     unsigned long brport_flags_s;
     int err;
 
     if (!wops->port_attr_bridge_flags_set)
         return -EOPNOTSUPP;
 
     err = rocker_world_port_attr_bridge_flags_support_get(rocker_port,
                                   &brport_flags_s);
     if (err)
         return err;
 
     if (flags.mask & ~brport_flags_s)
         return -EINVAL;
 
     return 0;
 }
 
 static int
 rocker_world_port_attr_bridge_flags_set(struct rocker_port *rocker_port,
                     struct switchdev_brport_flags flags)
 {
     struct rocker_world_ops *wops = rocker_port->rocker->wops;
 
     if (!wops->port_attr_bridge_flags_set)
         return -EOPNOTSUPP;
 
     return wops->port_attr_bridge_flags_set(rocker_port, flags.val);
 }
 
 static int
 rocker_world_port_attr_bridge_ageing_time_set(struct rocker_port *rocker_port,
                           u32 ageing_time)
 {
     struct rocker_world_ops *wops = rocker_port->rocker->wops;
 
     if (!wops->port_attr_bridge_ageing_time_set)
         return -EOPNOTSUPP;
 
     return wops->port_attr_bridge_ageing_time_set(rocker_port, ageing_time);
 }
 
 static int
 rocker_world_port_obj_vlan_add(struct rocker_port *rocker_port,
                    const struct switchdev_obj_port_vlan *vlan)
 {
     struct rocker_world_ops *wops = rocker_port->rocker->wops;
 
     if (!wops->port_obj_vlan_add)
         return -EOPNOTSUPP;
 
     return wops->port_obj_vlan_add(rocker_port, vlan);
 }
 
 static int
 rocker_world_port_obj_vlan_del(struct rocker_port *rocker_port,
                    const struct switchdev_obj_port_vlan *vlan)
 {
     struct rocker_world_ops *wops = rocker_port->rocker->wops;
 
     if (netif_is_bridge_master(vlan->obj.orig_dev))
         return -EOPNOTSUPP;
 
     if (!wops->port_obj_vlan_del)
         return -EOPNOTSUPP;
     return wops->port_obj_vlan_del(rocker_port, vlan);
 }
 
 static int
 rocker_world_port_fdb_add(struct rocker_port *rocker_port,
               struct switchdev_notifier_fdb_info *info)
 {
     struct rocker_world_ops *wops = rocker_port->rocker->wops;
 
     if (!wops->port_obj_fdb_add)
         return -EOPNOTSUPP;
 
     return wops->port_obj_fdb_add(rocker_port, info->vid, info->addr);
 }
 
 static int
 rocker_world_port_fdb_del(struct rocker_port *rocker_port,
               struct switchdev_notifier_fdb_info *info)
 {
     struct rocker_world_ops *wops = rocker_port->rocker->wops;
 
     if (!wops->port_obj_fdb_del)
         return -EOPNOTSUPP;
     return wops->port_obj_fdb_del(rocker_port, info->vid, info->addr);
 }
 
 static int rocker_world_port_master_linked(struct rocker_port *rocker_port,
                        struct net_device *master,
                        struct netlink_ext_ack *extack)
 {
     struct rocker_world_ops *wops = rocker_port->rocker->wops;
 
     if (!wops->port_master_linked)
         return -EOPNOTSUPP;
     return wops->port_master_linked(rocker_port, master, extack);
 }
 
 static int rocker_world_port_master_unlinked(struct rocker_port *rocker_port,
                          struct net_device *master)
 {
     struct rocker_world_ops *wops = rocker_port->rocker->wops;
 
     if (!wops->port_master_unlinked)
         return -EOPNOTSUPP;
     return wops->port_master_unlinked(rocker_port, master);
 }
 
 static int rocker_world_port_neigh_update(struct rocker_port *rocker_port,
                       struct neighbour *n)
 {
     struct rocker_world_ops *wops = rocker_port->rocker->wops;
 
     if (!wops->port_neigh_update)
         return -EOPNOTSUPP;
     return wops->port_neigh_update(rocker_port, n);
 }
 
 static int rocker_world_port_neigh_destroy(struct rocker_port *rocker_port,
                        struct neighbour *n)
 {
     struct rocker_world_ops *wops = rocker_port->rocker->wops;
 
     if (!wops->port_neigh_destroy)
         return -EOPNOTSUPP;
     return wops->port_neigh_destroy(rocker_port, n);
 }
 
 static int rocker_world_port_ev_mac_vlan_seen(struct rocker_port *rocker_port,
                           const unsigned char *addr,
                           __be16 vlan_id)
 {
     struct rocker_world_ops *wops = rocker_port->rocker->wops;
 
     if (!wops->port_ev_mac_vlan_seen)
         return -EOPNOTSUPP;
     return wops->port_ev_mac_vlan_seen(rocker_port, addr, vlan_id);
 }
 
 static int rocker_world_fib4_add(struct rocker *rocker,
                  const struct fib_entry_notifier_info *fen_info)
 {
     struct rocker_world_ops *wops = rocker->wops;
 
     if (!wops->fib4_add)
         return 0;
     return wops->fib4_add(rocker, fen_info);
 }
 
 static int rocker_world_fib4_del(struct rocker *rocker,
                  const struct fib_entry_notifier_info *fen_info)
 {
     struct rocker_world_ops *wops = rocker->wops;
 
     if (!wops->fib4_del)
         return 0;
     return wops->fib4_del(rocker, fen_info);
 }
 
 static void rocker_world_fib4_abort(struct rocker *rocker)
 {
     struct rocker_world_ops *wops = rocker->wops;
 
     if (wops->fib4_abort)
         wops->fib4_abort(rocker);
 }
 
 /*****************
  * Net device ops
  *****************/
 
 static int rocker_port_open(struct net_device *dev)
 {
     struct rocker_port *rocker_port = netdev_priv(dev);
     int err;
 
     err = rocker_port_dma_rings_init(rocker_port);
     if (err)
         return err;
 
     err = request_irq(rocker_msix_tx_vector(rocker_port),
               rocker_tx_irq_handler, 0,
               rocker_driver_name, rocker_port);
     if (err) {
         netdev_err(rocker_port->dev, "cannot assign tx irq\n");
         goto err_request_tx_irq;
     }
 
     err = request_irq(rocker_msix_rx_vector(rocker_port),
               rocker_rx_irq_handler, 0,
               rocker_driver_name, rocker_port);
     if (err) {
         netdev_err(rocker_port->dev, "cannot assign rx irq\n");
         goto err_request_rx_irq;
     }
 
     err = rocker_world_port_open(rocker_port);
     if (err) {
         netdev_err(rocker_port->dev, "cannot open port in world\n");
         goto err_world_port_open;
     }
 
     napi_enable(&rocker_port->napi_tx);
     napi_enable(&rocker_port->napi_rx);
     if (!dev->proto_down)
         rocker_port_set_enable(rocker_port, true);
     netif_start_queue(dev);
     return 0;
 
 err_world_port_open:
     free_irq(rocker_msix_rx_vector(rocker_port), rocker_port);
 err_request_rx_irq:
     free_irq(rocker_msix_tx_vector(rocker_port), rocker_port);
 err_request_tx_irq:
     rocker_port_dma_rings_fini(rocker_port);
     return err;
 }
 
 static int rocker_port_stop(struct net_device *dev)
 {
     struct rocker_port *rocker_port = netdev_priv(dev);
 
     netif_stop_queue(dev);
     rocker_port_set_enable(rocker_port, false);
     napi_disable(&rocker_port->napi_rx);
     napi_disable(&rocker_port->napi_tx);
     rocker_world_port_stop(rocker_port);
     free_irq(rocker_msix_rx_vector(rocker_port), rocker_port);
     free_irq(rocker_msix_tx_vector(rocker_port), rocker_port);
     rocker_port_dma_rings_fini(rocker_port);
 
     return 0;
 }
 
 static void rocker_tx_desc_frags_unmap(const struct rocker_port *rocker_port,
                        const struct rocker_desc_info *desc_info)
 {
     const struct rocker *rocker = rocker_port->rocker;
     struct pci_dev *pdev = rocker->pdev;
     const struct rocker_tlv *attrs[ROCKER_TLV_TX_MAX + 1];
     struct rocker_tlv *attr;
     int rem;
 
     rocker_tlv_parse_desc(attrs, ROCKER_TLV_TX_MAX, desc_info);
     if (!attrs[ROCKER_TLV_TX_FRAGS])
         return;
     rocker_tlv_for_each_nested(attr, attrs[ROCKER_TLV_TX_FRAGS], rem) {
         const struct rocker_tlv *frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_MAX + 1];
         dma_addr_t dma_handle;
         size_t len;
 
         if (rocker_tlv_type(attr) != ROCKER_TLV_TX_FRAG)
             continue;
         rocker_tlv_parse_nested(frag_attrs, ROCKER_TLV_TX_FRAG_ATTR_MAX,
                     attr);
         if (!frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_ADDR] ||
             !frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_LEN])
             continue;
         dma_handle = rocker_tlv_get_u64(frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_ADDR]);
         len = rocker_tlv_get_u16(frag_attrs[ROCKER_TLV_TX_FRAG_ATTR_LEN]);
         dma_unmap_single(&pdev->dev, dma_handle, len, DMA_TO_DEVICE);
     }
 }
 
 static int rocker_tx_desc_frag_map_put(const struct rocker_port *rocker_port,
                        struct rocker_desc_info *desc_info,
                        char *buf, size_t buf_len)
 {
     const struct rocker *rocker = rocker_port->rocker;
     struct pci_dev *pdev = rocker->pdev;
     dma_addr_t dma_handle;
     struct rocker_tlv *frag;
 
     dma_handle = dma_map_single(&pdev->dev, buf, buf_len, DMA_TO_DEVICE);
     if (unlikely(dma_mapping_error(&pdev->dev, dma_handle))) {
         if (net_ratelimit())
             netdev_err(rocker_port->dev, "failed to dma map tx frag\n");
         return -EIO;
     }
     frag = rocker_tlv_nest_start(desc_info, ROCKER_TLV_TX_FRAG);
     if (!frag)
         goto unmap_frag;
     if (rocker_tlv_put_u64(desc_info, ROCKER_TLV_TX_FRAG_ATTR_ADDR,
                    dma_handle))
         goto nest_cancel;
     if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_TX_FRAG_ATTR_LEN,
                    buf_len))
         goto nest_cancel;
     rocker_tlv_nest_end(desc_info, frag);
     return 0;
 
 nest_cancel:
     rocker_tlv_nest_cancel(desc_info, frag);
 unmap_frag:
     dma_unmap_single(&pdev->dev, dma_handle, buf_len, DMA_TO_DEVICE);
     return -EMSGSIZE;
 }
 
 static netdev_tx_t rocker_port_xmit(struct sk_buff *skb, struct net_device *dev)
 {
     struct rocker_port *rocker_port = netdev_priv(dev);
     struct rocker *rocker = rocker_port->rocker;
     struct rocker_desc_info *desc_info;
     struct rocker_tlv *frags;
     int i;
     int err;
 
     desc_info = rocker_desc_head_get(&rocker_port->tx_ring);
     if (unlikely(!desc_info)) {
         if (net_ratelimit())
             netdev_err(dev, "tx ring full when queue awake\n");
         return NETDEV_TX_BUSY;
     }
 
     rocker_desc_cookie_ptr_set(desc_info, skb);
 
     frags = rocker_tlv_nest_start(desc_info, ROCKER_TLV_TX_FRAGS);
     if (!frags)
         goto out;
     err = rocker_tx_desc_frag_map_put(rocker_port, desc_info,
                       skb->data, skb_headlen(skb));
     if (err)
         goto nest_cancel;
     if (skb_shinfo(skb)->nr_frags > ROCKER_TX_FRAGS_MAX) {
         err = skb_linearize(skb);
         if (err)
             goto unmap_frags;
     }
 
     for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
         const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
 
         err = rocker_tx_desc_frag_map_put(rocker_port, desc_info,
                           skb_frag_address(frag),
                           skb_frag_size(frag));
         if (err)
             goto unmap_frags;
     }
     rocker_tlv_nest_end(desc_info, frags);
 
     rocker_desc_gen_clear(desc_info);
     rocker_desc_head_set(rocker, &rocker_port->tx_ring, desc_info);
 
     desc_info = rocker_desc_head_get(&rocker_port->tx_ring);
     if (!desc_info)
         netif_stop_queue(dev);
 
     return NETDEV_TX_OK;
 
 unmap_frags:
     rocker_tx_desc_frags_unmap(rocker_port, desc_info);
 nest_cancel:
     rocker_tlv_nest_cancel(desc_info, frags);
 out:
     dev_kfree_skb(skb);
     dev->stats.tx_dropped++;
 
     return NETDEV_TX_OK;
 }
 
 static int rocker_port_set_mac_address(struct net_device *dev, void *p)
 {
     struct sockaddr *addr = p;
     struct rocker_port *rocker_port = netdev_priv(dev);
     int err;
 
     if (!is_valid_ether_addr(addr->sa_data))
         return -EADDRNOTAVAIL;
 
     err = rocker_cmd_set_port_settings_macaddr(rocker_port, addr->sa_data);
     if (err)
         return err;
     eth_hw_addr_set(dev, addr->sa_data);
     return 0;
 }
 
 static int rocker_port_change_mtu(struct net_device *dev, int new_mtu)
 {
     struct rocker_port *rocker_port = netdev_priv(dev);
     int running = netif_running(dev);
     int err;
 
     if (running)
         rocker_port_stop(dev);
 
     netdev_info(dev, "MTU change from %d to %d\n", dev->mtu, new_mtu);
     dev->mtu = new_mtu;
 
     err = rocker_cmd_set_port_settings_mtu(rocker_port, new_mtu);
     if (err)
         return err;
 
     if (running)
         err = rocker_port_open(dev);
 
     return err;
 }
 
 static int rocker_port_get_phys_port_name(struct net_device *dev,
                       char *buf, size_t len)
 {
     struct rocker_port *rocker_port = netdev_priv(dev);
     struct port_name name = { .buf = buf, .len = len };
     int err;
 
     err = rocker_cmd_exec(rocker_port, false,
                   rocker_cmd_get_port_settings_prep, NULL,
                   rocker_cmd_get_port_settings_phys_name_proc,
                   &name);
 
     return err ? -EOPNOTSUPP : 0;
 }
 
 static void rocker_port_neigh_destroy(struct net_device *dev,
                       struct neighbour *n)
 {
     struct rocker_port *rocker_port = netdev_priv(n->dev);
     int err;
 
     err = rocker_world_port_neigh_destroy(rocker_port, n);
     if (err)
         netdev_warn(rocker_port->dev, "failed to handle neigh destroy (err %d)\n",
                 err);
 }
 
 static int rocker_port_get_port_parent_id(struct net_device *dev,
                       struct netdev_phys_item_id *ppid)
 {
     const struct rocker_port *rocker_port = netdev_priv(dev);
     const struct rocker *rocker = rocker_port->rocker;
 
     ppid->id_len = sizeof(rocker->hw.id);
     memcpy(&ppid->id, &rocker->hw.id, ppid->id_len);
 
     return 0;
 }
 
 static const struct net_device_ops rocker_port_netdev_ops = {
     .ndo_open           = rocker_port_open,
     .ndo_stop           = rocker_port_stop,
     .ndo_start_xmit         = rocker_port_xmit,
     .ndo_set_mac_address        = rocker_port_set_mac_address,
     .ndo_change_mtu         = rocker_port_change_mtu,
     .ndo_get_phys_port_name     = rocker_port_get_phys_port_name,
     .ndo_neigh_destroy      = rocker_port_neigh_destroy,
     .ndo_get_port_parent_id     = rocker_port_get_port_parent_id,
 };
 
 /********************
  * swdev interface
  ********************/
 
 static int rocker_port_attr_set(struct net_device *dev,
                 const struct switchdev_attr *attr)
 {
     struct rocker_port *rocker_port = netdev_priv(dev);
     int err = 0;
 
     switch (attr->id) {
     case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
         err = rocker_world_port_attr_stp_state_set(rocker_port,
                                attr->u.stp_state);
         break;
     case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
         err = rocker_world_port_attr_pre_bridge_flags_set(rocker_port,
                                   attr->u.brport_flags);
         break;
     case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
         err = rocker_world_port_attr_bridge_flags_set(rocker_port,
                                   attr->u.brport_flags);
         break;
     case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
         err = rocker_world_port_attr_bridge_ageing_time_set(rocker_port,
                                     attr->u.ageing_time);
         break;
     default:
         err = -EOPNOTSUPP;
         break;
     }
 
     return err;
 }
 
 static int rocker_port_obj_add(struct net_device *dev,
                    const struct switchdev_obj *obj)
 {
     struct rocker_port *rocker_port = netdev_priv(dev);
     int err = 0;
 
     switch (obj->id) {
     case SWITCHDEV_OBJ_ID_PORT_VLAN:
         err = rocker_world_port_obj_vlan_add(rocker_port,
                              SWITCHDEV_OBJ_PORT_VLAN(obj));
         break;
     default:
         err = -EOPNOTSUPP;
         break;
     }
 
     return err;
 }
 
 static int rocker_port_obj_del(struct net_device *dev,
                    const struct switchdev_obj *obj)
 {
     struct rocker_port *rocker_port = netdev_priv(dev);
     int err = 0;
 
     switch (obj->id) {
     case SWITCHDEV_OBJ_ID_PORT_VLAN:
         err = rocker_world_port_obj_vlan_del(rocker_port,
                              SWITCHDEV_OBJ_PORT_VLAN(obj));
         break;
     default:
         err = -EOPNOTSUPP;
         break;
     }
 
     return err;
 }
 
 struct rocker_fib_event_work {
     struct work_struct work;
     union {
         struct fib_entry_notifier_info fen_info;
         struct fib_rule_notifier_info fr_info;
     };
     struct rocker *rocker;
     unsigned long event;
 };
 
 static void rocker_router_fib_event_work(struct work_struct *work)
 {
     struct rocker_fib_event_work *fib_work =
         container_of(work, struct rocker_fib_event_work, work);
     struct rocker *rocker = fib_work->rocker;
     struct fib_rule *rule;
     int err;
 
     /* Protect internal structures from changes */
     rtnl_lock();
     switch (fib_work->event) {
     case FIB_EVENT_ENTRY_REPLACE:
         err = rocker_world_fib4_add(rocker, &fib_work->fen_info);
         if (err)
             rocker_world_fib4_abort(rocker);
         fib_info_put(fib_work->fen_info.fi);
         break;
     case FIB_EVENT_ENTRY_DEL:
         rocker_world_fib4_del(rocker, &fib_work->fen_info);
         fib_info_put(fib_work->fen_info.fi);
         break;
     case FIB_EVENT_RULE_ADD:
     case FIB_EVENT_RULE_DEL:
         rule = fib_work->fr_info.rule;
         if (!fib4_rule_default(rule))
             rocker_world_fib4_abort(rocker);
         fib_rule_put(rule);
         break;
     }
     rtnl_unlock();
     kfree(fib_work);
 }
 
 /* Called with rcu_read_lock() */
 static int rocker_router_fib_event(struct notifier_block *nb,
                    unsigned long event, void *ptr)
 {
     struct rocker *rocker = container_of(nb, struct rocker, fib_nb);
     struct rocker_fib_event_work *fib_work;
     struct fib_notifier_info *info = ptr;
 
     if (info->family != AF_INET)
         return NOTIFY_DONE;
 
     fib_work = kzalloc(sizeof(*fib_work), GFP_ATOMIC);
     if (WARN_ON(!fib_work))
         return NOTIFY_BAD;
 
     INIT_WORK(&fib_work->work, rocker_router_fib_event_work);
     fib_work->rocker = rocker;
     fib_work->event = event;
 
     switch (event) {
     case FIB_EVENT_ENTRY_REPLACE:
     case FIB_EVENT_ENTRY_DEL:
         if (info->family == AF_INET) {
             struct fib_entry_notifier_info *fen_info = ptr;
 
             if (fen_info->fi->fib_nh_is_v6) {
                 NL_SET_ERR_MSG_MOD(info->extack, "IPv6 gateway with IPv4 route is not supported");
                 kfree(fib_work);
                 return notifier_from_errno(-EINVAL);
             }
             if (fen_info->fi->nh) {
                 NL_SET_ERR_MSG_MOD(info->extack, "IPv4 route with nexthop objects is not supported");
                 kfree(fib_work);
                 return notifier_from_errno(-EINVAL);
             }
         }
 
         memcpy(&fib_work->fen_info, ptr, sizeof(fib_work->fen_info));
         /* Take referece on fib_info to prevent it from being
          * freed while work is queued. Release it afterwards.
          */
         fib_info_hold(fib_work->fen_info.fi);
         break;
     case FIB_EVENT_RULE_ADD:
     case FIB_EVENT_RULE_DEL:
         memcpy(&fib_work->fr_info, ptr, sizeof(fib_work->fr_info));
         fib_rule_get(fib_work->fr_info.rule);
         break;
     }
 
     queue_work(rocker->rocker_owq, &fib_work->work);
 
     return NOTIFY_DONE;
 }
 
 /********************
  * ethtool interface
  ********************/
 
 static int
 rocker_port_get_link_ksettings(struct net_device *dev,
                    struct ethtool_link_ksettings *ecmd)
 {
     struct rocker_port *rocker_port = netdev_priv(dev);
 
     return rocker_cmd_get_port_settings_ethtool(rocker_port, ecmd);
 }
 
 static int
 rocker_port_set_link_ksettings(struct net_device *dev,
                    const struct ethtool_link_ksettings *ecmd)
 {
     struct rocker_port *rocker_port = netdev_priv(dev);
 
     return rocker_cmd_set_port_settings_ethtool(rocker_port, ecmd);
 }
 
 static void rocker_port_get_drvinfo(struct net_device *dev,
                     struct ethtool_drvinfo *drvinfo)
 {
     strlcpy(drvinfo->driver, rocker_driver_name, sizeof(drvinfo->driver));
     strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
 }
 
 static struct rocker_port_stats {
     char str[ETH_GSTRING_LEN];
     int type;
 } rocker_port_stats[] = {
     { "rx_packets", ROCKER_TLV_CMD_PORT_STATS_RX_PKTS,    },
     { "rx_bytes",   ROCKER_TLV_CMD_PORT_STATS_RX_BYTES,   },
     { "rx_dropped", ROCKER_TLV_CMD_PORT_STATS_RX_DROPPED, },
     { "rx_errors",  ROCKER_TLV_CMD_PORT_STATS_RX_ERRORS,  },
 
     { "tx_packets", ROCKER_TLV_CMD_PORT_STATS_TX_PKTS,    },
     { "tx_bytes",   ROCKER_TLV_CMD_PORT_STATS_TX_BYTES,   },
     { "tx_dropped", ROCKER_TLV_CMD_PORT_STATS_TX_DROPPED, },
     { "tx_errors",  ROCKER_TLV_CMD_PORT_STATS_TX_ERRORS,  },
 };
 
 #define ROCKER_PORT_STATS_LEN  ARRAY_SIZE(rocker_port_stats)
 
 static void rocker_port_get_strings(struct net_device *netdev, u32 stringset,
                     u8 *data)
 {
     u8 *p = data;
     int i;
 
     switch (stringset) {
     case ETH_SS_STATS:
         for (i = 0; i < ARRAY_SIZE(rocker_port_stats); i++) {
             memcpy(p, rocker_port_stats[i].str, ETH_GSTRING_LEN);
             p += ETH_GSTRING_LEN;
         }
         break;
     }
 }
 
 static int
 rocker_cmd_get_port_stats_prep(const struct rocker_port *rocker_port,
                    struct rocker_desc_info *desc_info,
                    void *priv)
 {
     struct rocker_tlv *cmd_stats;
 
     if (rocker_tlv_put_u16(desc_info, ROCKER_TLV_CMD_TYPE,
                    ROCKER_TLV_CMD_TYPE_GET_PORT_STATS))
         return -EMSGSIZE;
 
     cmd_stats = rocker_tlv_nest_start(desc_info, ROCKER_TLV_CMD_INFO);
     if (!cmd_stats)
         return -EMSGSIZE;
 
     if (rocker_tlv_put_u32(desc_info, ROCKER_TLV_CMD_PORT_STATS_PPORT,
                    rocker_port->pport))
         return -EMSGSIZE;
 
     rocker_tlv_nest_end(desc_info, cmd_stats);
 
     return 0;
 }
 
 static int
 rocker_cmd_get_port_stats_ethtool_proc(const struct rocker_port *rocker_port,
                        const struct rocker_desc_info *desc_info,
                        void *priv)
 {
     const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
     const struct rocker_tlv *stats_attrs[ROCKER_TLV_CMD_PORT_STATS_MAX + 1];
     const struct rocker_tlv *pattr;
     u32 pport;
     u64 *data = priv;
     int i;
 
     rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
 
     if (!attrs[ROCKER_TLV_CMD_INFO])
         return -EIO;
 
     rocker_tlv_parse_nested(stats_attrs, ROCKER_TLV_CMD_PORT_STATS_MAX,
                 attrs[ROCKER_TLV_CMD_INFO]);
 
     if (!stats_attrs[ROCKER_TLV_CMD_PORT_STATS_PPORT])
         return -EIO;
 
     pport = rocker_tlv_get_u32(stats_attrs[ROCKER_TLV_CMD_PORT_STATS_PPORT]);
     if (pport != rocker_port->pport)
         return -EIO;
 
     for (i = 0; i < ARRAY_SIZE(rocker_port_stats); i++) {
         pattr = stats_attrs[rocker_port_stats[i].type];
         if (!pattr)
             continue;
 
         data[i] = rocker_tlv_get_u64(pattr);
     }
 
     return 0;
 }
 
 static int rocker_cmd_get_port_stats_ethtool(struct rocker_port *rocker_port,
                          void *priv)
 {
     return rocker_cmd_exec(rocker_port, false,
                    rocker_cmd_get_port_stats_prep, NULL,
                    rocker_cmd_get_port_stats_ethtool_proc,
                    priv);
 }
 
 static void rocker_port_get_stats(struct net_device *dev,
                   struct ethtool_stats *stats, u64 *data)
 {
     struct rocker_port *rocker_port = netdev_priv(dev);
 
     if (rocker_cmd_get_port_stats_ethtool(rocker_port, data) != 0) {
         int i;
 
         for (i = 0; i < ARRAY_SIZE(rocker_port_stats); ++i)
             data[i] = 0;
     }
 }
 
 static int rocker_port_get_sset_count(struct net_device *netdev, int sset)
 {
     switch (sset) {
     case ETH_SS_STATS:
         return ROCKER_PORT_STATS_LEN;
     default:
         return -EOPNOTSUPP;
     }
 }
 
 static const struct ethtool_ops rocker_port_ethtool_ops = {
     .get_drvinfo        = rocker_port_get_drvinfo,
     .get_link       = ethtool_op_get_link,
     .get_strings        = rocker_port_get_strings,
     .get_ethtool_stats  = rocker_port_get_stats,
     .get_sset_count     = rocker_port_get_sset_count,
     .get_link_ksettings = rocker_port_get_link_ksettings,
     .set_link_ksettings = rocker_port_set_link_ksettings,
 };
 
 /*****************
  * NAPI interface
  *****************/
 
 static struct rocker_port *rocker_port_napi_tx_get(struct napi_struct *napi)
 {
     return container_of(napi, struct rocker_port, napi_tx);
 }
 
 static int rocker_port_poll_tx(struct napi_struct *napi, int budget)
 {
     struct rocker_port *rocker_port = rocker_port_napi_tx_get(napi);
     const struct rocker *rocker = rocker_port->rocker;
     const struct rocker_desc_info *desc_info;
     u32 credits = 0;
     int err;
 
     /* Cleanup tx descriptors */
     while ((desc_info = rocker_desc_tail_get(&rocker_port->tx_ring))) {
         struct sk_buff *skb;
 
         err = rocker_desc_err(desc_info);
         if (err && net_ratelimit())
             netdev_err(rocker_port->dev, "tx desc received with err %d\n",
                    err);
         rocker_tx_desc_frags_unmap(rocker_port, desc_info);
 
         skb = rocker_desc_cookie_ptr_get(desc_info);
         if (err == 0) {
             rocker_port->dev->stats.tx_packets++;
             rocker_port->dev->stats.tx_bytes += skb->len;
         } else {
             rocker_port->dev->stats.tx_errors++;
         }
 
         dev_kfree_skb_any(skb);
         credits++;
     }
 
     if (credits && netif_queue_stopped(rocker_port->dev))
         netif_wake_queue(rocker_port->dev);
 
     napi_complete(napi);
     rocker_dma_ring_credits_set(rocker, &rocker_port->tx_ring, credits);
 
     return 0;
 }
 
 static int rocker_port_rx_proc(const struct rocker *rocker,
                    const struct rocker_port *rocker_port,
                    struct rocker_desc_info *desc_info)
 {
     const struct rocker_tlv *attrs[ROCKER_TLV_RX_MAX + 1];
     struct sk_buff *skb = rocker_desc_cookie_ptr_get(desc_info);
     size_t rx_len;
     u16 rx_flags = 0;
 
     if (!skb)
         return -ENOENT;
 
     rocker_tlv_parse_desc(attrs, ROCKER_TLV_RX_MAX, desc_info);
     if (!attrs[ROCKER_TLV_RX_FRAG_LEN])
         return -EINVAL;
     if (attrs[ROCKER_TLV_RX_FLAGS])
         rx_flags = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FLAGS]);
 
     rocker_dma_rx_ring_skb_unmap(rocker, attrs);
 
     rx_len = rocker_tlv_get_u16(attrs[ROCKER_TLV_RX_FRAG_LEN]);
     skb_put(skb, rx_len);
     skb->protocol = eth_type_trans(skb, rocker_port->dev);
 
     if (rx_flags & ROCKER_RX_FLAGS_FWD_OFFLOAD)
         skb->offload_fwd_mark = 1;
 
     rocker_port->dev->stats.rx_packets++;
     rocker_port->dev->stats.rx_bytes += skb->len;
 
     netif_receive_skb(skb);
 
     return rocker_dma_rx_ring_skb_alloc(rocker_port, desc_info);
 }
 
 static struct rocker_port *rocker_port_napi_rx_get(struct napi_struct *napi)
 {
     return container_of(napi, struct rocker_port, napi_rx);
 }
 
 static int rocker_port_poll_rx(struct napi_struct *napi, int budget)
 {
     struct rocker_port *rocker_port = rocker_port_napi_rx_get(napi);
     const struct rocker *rocker = rocker_port->rocker;
     struct rocker_desc_info *desc_info;
     u32 credits = 0;
     int err;
 
     /* Process rx descriptors */
     while (credits < budget &&
            (desc_info = rocker_desc_tail_get(&rocker_port->rx_ring))) {
         err = rocker_desc_err(desc_info);
         if (err) {
             if (net_ratelimit())
                 netdev_err(rocker_port->dev, "rx desc received with err %d\n",
                        err);
         } else {
             err = rocker_port_rx_proc(rocker, rocker_port,
                           desc_info);
             if (err && net_ratelimit())
                 netdev_err(rocker_port->dev, "rx processing failed with err %d\n",
                        err);
         }
         if (err)
             rocker_port->dev->stats.rx_errors++;
 
         rocker_desc_gen_clear(desc_info);
         rocker_desc_head_set(rocker, &rocker_port->rx_ring, desc_info);
         credits++;
     }
 
     if (credits < budget)
         napi_complete_done(napi, credits);
 
     rocker_dma_ring_credits_set(rocker, &rocker_port->rx_ring, credits);
 
     return credits;
 }
 
 /*****************
  * PCI driver ops
  *****************/
 
 static void rocker_carrier_init(const struct rocker_port *rocker_port)
 {
     const struct rocker *rocker = rocker_port->rocker;
     u64 link_status = rocker_read64(rocker, PORT_PHYS_LINK_STATUS);
     bool link_up;
 
     link_up = link_status & (1 << rocker_port->pport);
     if (link_up)
         netif_carrier_on(rocker_port->dev);
     else
         netif_carrier_off(rocker_port->dev);
 }
 
 static void rocker_remove_ports(struct rocker *rocker)
 {
     struct rocker_port *rocker_port;
     int i;
 
     for (i = 0; i < rocker->port_count; i++) {
         rocker_port = rocker->ports[i];
         if (!rocker_port)
             continue;
         rocker_world_port_fini(rocker_port);
         unregister_netdev(rocker_port->dev);
         rocker_world_port_post_fini(rocker_port);
         free_netdev(rocker_port->dev);
     }
     rocker_world_fini(rocker);
     kfree(rocker->ports);
 }
 
 static void rocker_port_dev_addr_init(struct rocker_port *rocker_port)
 {
     const struct rocker *rocker = rocker_port->rocker;
     const struct pci_dev *pdev = rocker->pdev;
     u8 addr[ETH_ALEN];
     int err;
 
     err = rocker_cmd_get_port_settings_macaddr(rocker_port, addr);
     if (!err) {
         eth_hw_addr_set(rocker_port->dev, addr);
     } else {
         dev_warn(&pdev->dev, "failed to get mac address, using random\n");
         eth_hw_addr_random(rocker_port->dev);
     }
 }
 
 #define ROCKER_PORT_MIN_MTU ETH_MIN_MTU
 #define ROCKER_PORT_MAX_MTU 9000
 static int rocker_probe_port(struct rocker *rocker, unsigned int port_number)
 {
     struct pci_dev *pdev = rocker->pdev;
     struct rocker_port *rocker_port;
     struct net_device *dev;
     int err;
 
     dev = alloc_etherdev(sizeof(struct rocker_port));
     if (!dev)
         return -ENOMEM;
     SET_NETDEV_DEV(dev, &pdev->dev);
     rocker_port = netdev_priv(dev);
     rocker_port->dev = dev;
     rocker_port->rocker = rocker;
     rocker_port->port_number = port_number;
     rocker_port->pport = port_number + 1;
 
     err = rocker_world_check_init(rocker_port);
     if (err) {
         dev_err(&pdev->dev, "world init failed\n");
         goto err_world_check_init;
     }
 
     rocker_port_dev_addr_init(rocker_port);
     dev->netdev_ops = &rocker_port_netdev_ops;
     dev->ethtool_ops = &rocker_port_ethtool_ops;
     netif_napi_add_tx(dev, &rocker_port->napi_tx, rocker_port_poll_tx);
     netif_napi_add(dev, &rocker_port->napi_rx, rocker_port_poll_rx,
                NAPI_POLL_WEIGHT);
     rocker_carrier_init(rocker_port);
 
     dev->features |= NETIF_F_NETNS_LOCAL | NETIF_F_SG;
 
     /* MTU range: 68 - 9000 */
     dev->min_mtu = ROCKER_PORT_MIN_MTU;
     dev->max_mtu = ROCKER_PORT_MAX_MTU;
 
     err = rocker_world_port_pre_init(rocker_port);
     if (err) {
         dev_err(&pdev->dev, "port world pre-init failed\n");
         goto err_world_port_pre_init;
     }
     err = register_netdev(dev);
     if (err) {
         dev_err(&pdev->dev, "register_netdev failed\n");
         goto err_register_netdev;
     }
     rocker->ports[port_number] = rocker_port;
 
     err = rocker_world_port_init(rocker_port);
     if (err) {
         dev_err(&pdev->dev, "port world init failed\n");
         goto err_world_port_init;
     }
 
     return 0;
 
 err_world_port_init:
     rocker->ports[port_number] = NULL;
     unregister_netdev(dev);
 err_register_netdev:
     rocker_world_port_post_fini(rocker_port);
 err_world_port_pre_init:
 err_world_check_init:
     free_netdev(dev);
     return err;
 }
 
 static int rocker_probe_ports(struct rocker *rocker)
 {
     int i;
     size_t alloc_size;
     int err;
 
     alloc_size = sizeof(struct rocker_port *) * rocker->port_count;
     rocker->ports = kzalloc(alloc_size, GFP_KERNEL);
     if (!rocker->ports)
         return -ENOMEM;
     for (i = 0; i < rocker->port_count; i++) {
         err = rocker_probe_port(rocker, i);
         if (err)
             goto remove_ports;
     }
     return 0;
 
 remove_ports:
     rocker_remove_ports(rocker);
     return err;
 }
 
 static int rocker_msix_init(struct rocker *rocker)
 {
     struct pci_dev *pdev = rocker->pdev;
     int msix_entries;
     int i;
     int err;
 
     msix_entries = pci_msix_vec_count(pdev);
     if (msix_entries < 0)
         return msix_entries;
 
     if (msix_entries != ROCKER_MSIX_VEC_COUNT(rocker->port_count))
         return -EINVAL;
 
     rocker->msix_entries = kmalloc_array(msix_entries,
                          sizeof(struct msix_entry),
                          GFP_KERNEL);
     if (!rocker->msix_entries)
         return -ENOMEM;
 
     for (i = 0; i < msix_entries; i++)
         rocker->msix_entries[i].entry = i;
 
     err = pci_enable_msix_exact(pdev, rocker->msix_entries, msix_entries);
     if (err < 0)
         goto err_enable_msix;
 
     return 0;
 
 err_enable_msix:
     kfree(rocker->msix_entries);
     return err;
 }
 
 static void rocker_msix_fini(const struct rocker *rocker)
 {
     pci_disable_msix(rocker->pdev);
     kfree(rocker->msix_entries);
 }
 
 static bool rocker_port_dev_check(const struct net_device *dev)
 {
     return dev->netdev_ops == &rocker_port_netdev_ops;
 }
 
 static int
 rocker_switchdev_port_attr_set_event(struct net_device *netdev,
         struct switchdev_notifier_port_attr_info *port_attr_info)
 {
     int err;
 
     err = rocker_port_attr_set(netdev, port_attr_info->attr);
 
     port_attr_info->handled = true;
     return notifier_from_errno(err);
 }
 
 struct rocker_switchdev_event_work {
     struct work_struct work;
     struct switchdev_notifier_fdb_info fdb_info;
     struct rocker_port *rocker_port;
     unsigned long event;
 };
 
 static void
 rocker_fdb_offload_notify(struct rocker_port *rocker_port,
               struct switchdev_notifier_fdb_info *recv_info)
 {
     struct switchdev_notifier_fdb_info info = {};
 
     info.addr = recv_info->addr;
     info.vid = recv_info->vid;
     info.offloaded = true;
     call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED,
                  rocker_port->dev, &info.info, NULL);
 }
 
 static void rocker_switchdev_event_work(struct work_struct *work)
 {
     struct rocker_switchdev_event_work *switchdev_work =
         container_of(work, struct rocker_switchdev_event_work, work);
     struct rocker_port *rocker_port = switchdev_work->rocker_port;
     struct switchdev_notifier_fdb_info *fdb_info;
     int err;
 
     rtnl_lock();
     switch (switchdev_work->event) {
     case SWITCHDEV_FDB_ADD_TO_DEVICE:
         fdb_info = &switchdev_work->fdb_info;
         if (!fdb_info->added_by_user || fdb_info->is_local)
             break;
         err = rocker_world_port_fdb_add(rocker_port, fdb_info);
         if (err) {
             netdev_dbg(rocker_port->dev, "fdb add failed err=%d\n", err);
             break;
         }
         rocker_fdb_offload_notify(rocker_port, fdb_info);
         break;
     case SWITCHDEV_FDB_DEL_TO_DEVICE:
         fdb_info = &switchdev_work->fdb_info;
         if (!fdb_info->added_by_user || fdb_info->is_local)
             break;
         err = rocker_world_port_fdb_del(rocker_port, fdb_info);
         if (err)
             netdev_dbg(rocker_port->dev, "fdb add failed err=%d\n", err);
         break;
     }
     rtnl_unlock();
 
     kfree(switchdev_work->fdb_info.addr);
     kfree(switchdev_work);
     dev_put(rocker_port->dev);
 }
 
 /* called under rcu_read_lock() */
 static int rocker_switchdev_event(struct notifier_block *unused,
                   unsigned long event, void *ptr)
 {
     struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
     struct rocker_switchdev_event_work *switchdev_work;
     struct switchdev_notifier_fdb_info *fdb_info = ptr;
     struct rocker_port *rocker_port;
 
     if (!rocker_port_dev_check(dev))
         return NOTIFY_DONE;
 
     if (event == SWITCHDEV_PORT_ATTR_SET)
         return rocker_switchdev_port_attr_set_event(dev, ptr);
 
     rocker_port = netdev_priv(dev);
     switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
     if (WARN_ON(!switchdev_work))
         return NOTIFY_BAD;
 
     INIT_WORK(&switchdev_work->work, rocker_switchdev_event_work);
     switchdev_work->rocker_port = rocker_port;
     switchdev_work->event = event;
 
     switch (event) {
     case SWITCHDEV_FDB_ADD_TO_DEVICE:
     case SWITCHDEV_FDB_DEL_TO_DEVICE:
         memcpy(&switchdev_work->fdb_info, ptr,
                sizeof(switchdev_work->fdb_info));
         switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
         if (unlikely(!switchdev_work->fdb_info.addr)) {
             kfree(switchdev_work);
             return NOTIFY_BAD;
         }
 
         ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
                 fdb_info->addr);
         /* Take a reference on the rocker device */
         dev_hold(dev);
         break;
     default:
         kfree(switchdev_work);
         return NOTIFY_DONE;
     }
 
     queue_work(rocker_port->rocker->rocker_owq,
            &switchdev_work->work);
     return NOTIFY_DONE;
 }
 
 static int
 rocker_switchdev_port_obj_event(unsigned long event, struct net_device *netdev,
             struct switchdev_notifier_port_obj_info *port_obj_info)
 {
     int err = -EOPNOTSUPP;
 
     switch (event) {
     case SWITCHDEV_PORT_OBJ_ADD:
         err = rocker_port_obj_add(netdev, port_obj_info->obj);
         break;
     case SWITCHDEV_PORT_OBJ_DEL:
         err = rocker_port_obj_del(netdev, port_obj_info->obj);
         break;
     }
 
     port_obj_info->handled = true;
     return notifier_from_errno(err);
 }
 
 static int rocker_switchdev_blocking_event(struct notifier_block *unused,
                        unsigned long event, void *ptr)
 {
     struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
 
     if (!rocker_port_dev_check(dev))
         return NOTIFY_DONE;
 
     switch (event) {
     case SWITCHDEV_PORT_OBJ_ADD:
     case SWITCHDEV_PORT_OBJ_DEL:
         return rocker_switchdev_port_obj_event(event, dev, ptr);
     case SWITCHDEV_PORT_ATTR_SET:
         return rocker_switchdev_port_attr_set_event(dev, ptr);
     }
 
     return NOTIFY_DONE;
 }
 
 static struct notifier_block rocker_switchdev_notifier = {
     .notifier_call = rocker_switchdev_event,
 };
 
 static struct notifier_block rocker_switchdev_blocking_notifier = {
     .notifier_call = rocker_switchdev_blocking_event,
 };
 
 static int rocker_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 {
     struct notifier_block *nb;
     struct rocker *rocker;
     int err;
 
     rocker = kzalloc(sizeof(*rocker), GFP_KERNEL);
     if (!rocker)
         return -ENOMEM;
 
     err = pci_enable_device(pdev);
     if (err) {
         dev_err(&pdev->dev, "pci_enable_device failed\n");
         goto err_pci_enable_device;
     }
 
     err = pci_request_regions(pdev, rocker_driver_name);
     if (err) {
         dev_err(&pdev->dev, "pci_request_regions failed\n");
         goto err_pci_request_regions;
     }
 
     err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
     if (err) {
         dev_err(&pdev->dev, "dma_set_mask failed\n");
         goto err_pci_set_dma_mask;
     }
 
     if (pci_resource_len(pdev, 0) < ROCKER_PCI_BAR0_SIZE) {
         dev_err(&pdev->dev, "invalid PCI region size\n");
         err = -EINVAL;
         goto err_pci_resource_len_check;
     }
 
     rocker->hw_addr = ioremap(pci_resource_start(pdev, 0),
                   pci_resource_len(pdev, 0));
     if (!rocker->hw_addr) {
         dev_err(&pdev->dev, "ioremap failed\n");
         err = -EIO;
         goto err_ioremap;
     }
     pci_set_master(pdev);
 
     rocker->pdev = pdev;
     pci_set_drvdata(pdev, rocker);
 
     rocker->port_count = rocker_read32(rocker, PORT_PHYS_COUNT);
 
     err = rocker_msix_init(rocker);
     if (err) {
         dev_err(&pdev->dev, "MSI-X init failed\n");
         goto err_msix_init;
     }
 
     err = rocker_basic_hw_test(rocker);
     if (err) {
         dev_err(&pdev->dev, "basic hw test failed\n");
         goto err_basic_hw_test;
     }
 
     rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET);
 
     err = rocker_dma_rings_init(rocker);
     if (err)
         goto err_dma_rings_init;
 
     err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD),
               rocker_cmd_irq_handler, 0,
               rocker_driver_name, rocker);
     if (err) {
         dev_err(&pdev->dev, "cannot assign cmd irq\n");
         goto err_request_cmd_irq;
     }
 
     err = request_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT),
               rocker_event_irq_handler, 0,
               rocker_driver_name, rocker);
     if (err) {
         dev_err(&pdev->dev, "cannot assign event irq\n");
         goto err_request_event_irq;
     }
 
     rocker->rocker_owq = alloc_ordered_workqueue(rocker_driver_name,
                              WQ_MEM_RECLAIM);
     if (!rocker->rocker_owq) {
         err = -ENOMEM;
         goto err_alloc_ordered_workqueue;
     }
 
     err = rocker_probe_ports(rocker);
     if (err) {
         dev_err(&pdev->dev, "failed to probe ports\n");
         goto err_probe_ports;
     }
 
     /* Only FIBs pointing to our own netdevs are programmed into
      * the device, so no need to pass a callback.
      */
     rocker->fib_nb.notifier_call = rocker_router_fib_event;
     err = register_fib_notifier(&init_net, &rocker->fib_nb, NULL, NULL);
     if (err)
         goto err_register_fib_notifier;
 
     err = register_switchdev_notifier(&rocker_switchdev_notifier);
     if (err) {
         dev_err(&pdev->dev, "Failed to register switchdev notifier\n");
         goto err_register_switchdev_notifier;
     }
 
     nb = &rocker_switchdev_blocking_notifier;
     err = register_switchdev_blocking_notifier(nb);
     if (err) {
         dev_err(&pdev->dev, "Failed to register switchdev blocking notifier\n");
         goto err_register_switchdev_blocking_notifier;
     }
 
     rocker->hw.id = rocker_read64(rocker, SWITCH_ID);
 
     dev_info(&pdev->dev, "Rocker switch with id %*phN\n",
          (int)sizeof(rocker->hw.id), &rocker->hw.id);
 
     return 0;
 
 err_register_switchdev_blocking_notifier:
     unregister_switchdev_notifier(&rocker_switchdev_notifier);
 err_register_switchdev_notifier:
     unregister_fib_notifier(&init_net, &rocker->fib_nb);
 err_register_fib_notifier:
     rocker_remove_ports(rocker);
 err_probe_ports:
     destroy_workqueue(rocker->rocker_owq);
 err_alloc_ordered_workqueue:
     free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker);
 err_request_event_irq:
     free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker);
 err_request_cmd_irq:
     rocker_dma_rings_fini(rocker);
 err_dma_rings_init:
 err_basic_hw_test:
     rocker_msix_fini(rocker);
 err_msix_init:
     iounmap(rocker->hw_addr);
 err_ioremap:
 err_pci_resource_len_check:
 err_pci_set_dma_mask:
     pci_release_regions(pdev);
 err_pci_request_regions:
     pci_disable_device(pdev);
 err_pci_enable_device:
     kfree(rocker);
     return err;
 }
 
 static void rocker_remove(struct pci_dev *pdev)
 {
     struct rocker *rocker = pci_get_drvdata(pdev);
     struct notifier_block *nb;
 
     nb = &rocker_switchdev_blocking_notifier;
     unregister_switchdev_blocking_notifier(nb);
 
     unregister_switchdev_notifier(&rocker_switchdev_notifier);
     unregister_fib_notifier(&init_net, &rocker->fib_nb);
     rocker_remove_ports(rocker);
     rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET);
     destroy_workqueue(rocker->rocker_owq);
     free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker);
     free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker);
     rocker_dma_rings_fini(rocker);
     rocker_msix_fini(rocker);
     iounmap(rocker->hw_addr);
     pci_release_regions(rocker->pdev);
     pci_disable_device(rocker->pdev);
     kfree(rocker);
 }
 
 static struct pci_driver rocker_pci_driver = {
     .name       = rocker_driver_name,
     .id_table   = rocker_pci_id_table,
     .probe      = rocker_probe,
     .remove     = rocker_remove,
 };
 
 /************************************
  * Net device notifier event handler
  ************************************/
 
 static bool rocker_port_dev_check_under(const struct net_device *dev,
                     struct rocker *rocker)
 {
     struct rocker_port *rocker_port;
 
     if (!rocker_port_dev_check(dev))
         return false;
 
     rocker_port = netdev_priv(dev);
     if (rocker_port->rocker != rocker)
         return false;
 
     return true;
 }
 
 struct rocker_walk_data {
     struct rocker *rocker;
     struct rocker_port *port;
 };
 
 static int rocker_lower_dev_walk(struct net_device *lower_dev,
                  struct netdev_nested_priv *priv)
 {
     struct rocker_walk_data *data = (struct rocker_walk_data *)priv->data;
     int ret = 0;
 
     if (rocker_port_dev_check_under(lower_dev, data->rocker)) {
         data->port = netdev_priv(lower_dev);
         ret = 1;
     }
 
     return ret;
 }
 
 struct rocker_port *rocker_port_dev_lower_find(struct net_device *dev,
                            struct rocker *rocker)
 {
     struct netdev_nested_priv priv;
     struct rocker_walk_data data;
 
     if (rocker_port_dev_check_under(dev, rocker))
         return netdev_priv(dev);
 
     data.rocker = rocker;
     data.port = NULL;
     priv.data = (void *)&data;
     netdev_walk_all_lower_dev(dev, rocker_lower_dev_walk, &priv);
 
     return data.port;
 }
 
 static int rocker_netdevice_event(struct notifier_block *unused,
                   unsigned long event, void *ptr)
 {
     struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr);
     struct net_device *dev = netdev_notifier_info_to_dev(ptr);
     struct netdev_notifier_changeupper_info *info;
     struct rocker_port *rocker_port;
     int err;
 
     if (!rocker_port_dev_check(dev))
         return NOTIFY_DONE;
 
     switch (event) {
     case NETDEV_CHANGEUPPER:
         info = ptr;
         if (!info->master)
             goto out;
         rocker_port = netdev_priv(dev);
         if (info->linking) {
             err = rocker_world_port_master_linked(rocker_port,
                                   info->upper_dev,
                                   extack);
             if (err)
                 netdev_warn(dev, "failed to reflect master linked (err %d)\n",
                         err);
         } else {
             err = rocker_world_port_master_unlinked(rocker_port,
                                 info->upper_dev);
             if (err)
                 netdev_warn(dev, "failed to reflect master unlinked (err %d)\n",
                         err);
         }
     }
 out:
     return NOTIFY_DONE;
 }
 
 static struct notifier_block rocker_netdevice_nb __read_mostly = {
     .notifier_call = rocker_netdevice_event,
 };
 
 /************************************
  * Net event notifier event handler
  ************************************/
 
 static int rocker_netevent_event(struct notifier_block *unused,
                  unsigned long event, void *ptr)
 {
     struct rocker_port *rocker_port;
     struct net_device *dev;
     struct neighbour *n = ptr;
     int err;
 
     switch (event) {
     case NETEVENT_NEIGH_UPDATE:
         if (n->tbl != &arp_tbl)
             return NOTIFY_DONE;
         dev = n->dev;
         if (!rocker_port_dev_check(dev))
             return NOTIFY_DONE;
         rocker_port = netdev_priv(dev);
         err = rocker_world_port_neigh_update(rocker_port, n);
         if (err)
             netdev_warn(dev, "failed to handle neigh update (err %d)\n",
                     err);
         break;
     }
 
     return NOTIFY_DONE;
 }
 
 static struct notifier_block rocker_netevent_nb __read_mostly = {
     .notifier_call = rocker_netevent_event,
 };
 
 /***********************
  * Module init and exit
  ***********************/
 
 static int __init rocker_module_init(void)
 {
     int err;
 
     register_netdevice_notifier(&rocker_netdevice_nb);
     register_netevent_notifier(&rocker_netevent_nb);
     err = pci_register_driver(&rocker_pci_driver);
     if (err)
         goto err_pci_register_driver;
     return 0;
 
 err_pci_register_driver:
     unregister_netevent_notifier(&rocker_netevent_nb);
     unregister_netdevice_notifier(&rocker_netdevice_nb);
     return err;
 }
 
 static void __exit rocker_module_exit(void)
 {
     unregister_netevent_notifier(&rocker_netevent_nb);
     unregister_netdevice_notifier(&rocker_netdevice_nb);
     pci_unregister_driver(&rocker_pci_driver);
 }
 
 module_init(rocker_module_init);
 module_exit(rocker_module_exit);
 
 MODULE_LICENSE("GPL v2");
 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
 MODULE_AUTHOR("Scott Feldman <sfeldma@gmail.com>");
 MODULE_DESCRIPTION("Rocker switch device driver");
 MODULE_DEVICE_TABLE(pci, rocker_pci_id_table);