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path: root/drivers/net/ethernet/sfc/rx.c
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Diffstat (limited to 'drivers/net/ethernet/sfc/rx.c')
-rw-r--r--drivers/net/ethernet/sfc/rx.c592
1 files changed, 1 insertions, 591 deletions
diff --git a/drivers/net/ethernet/sfc/rx.c b/drivers/net/ethernet/sfc/rx.c
index c29bf862a94c..a2042f16babc 100644
--- a/drivers/net/ethernet/sfc/rx.c
+++ b/drivers/net/ethernet/sfc/rx.c
@@ -21,6 +21,7 @@
#include <linux/bpf_trace.h>
#include "net_driver.h"
#include "efx.h"
+#include "rx_common.h"
#include "filter.h"
#include "nic.h"
#include "selftest.h"
@@ -32,60 +33,13 @@
/* Maximum rx prefix used by any architecture. */
#define EFX_MAX_RX_PREFIX_SIZE 16
-/* Number of RX buffers to recycle pages for. When creating the RX page recycle
- * ring, this number is divided by the number of buffers per page to calculate
- * the number of pages to store in the RX page recycle ring.
- */
-#define EFX_RECYCLE_RING_SIZE_IOMMU 4096
-#define EFX_RECYCLE_RING_SIZE_NOIOMMU (2 * EFX_RX_PREFERRED_BATCH)
-
/* Size of buffer allocated for skb header area. */
#define EFX_SKB_HEADERS 128u
-/* This is the percentage fill level below which new RX descriptors
- * will be added to the RX descriptor ring.
- */
-static unsigned int rx_refill_threshold;
-
/* Each packet can consume up to ceil(max_frame_len / buffer_size) buffers */
#define EFX_RX_MAX_FRAGS DIV_ROUND_UP(EFX_MAX_FRAME_LEN(EFX_MAX_MTU), \
EFX_RX_USR_BUF_SIZE)
-/*
- * RX maximum head room required.
- *
- * This must be at least 1 to prevent overflow, plus one packet-worth
- * to allow pipelined receives.
- */
-#define EFX_RXD_HEAD_ROOM (1 + EFX_RX_MAX_FRAGS)
-
-static inline u8 *efx_rx_buf_va(struct efx_rx_buffer *buf)
-{
- return page_address(buf->page) + buf->page_offset;
-}
-
-static inline u32 efx_rx_buf_hash(struct efx_nic *efx, const u8 *eh)
-{
-#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS)
- return __le32_to_cpup((const __le32 *)(eh + efx->rx_packet_hash_offset));
-#else
- const u8 *data = eh + efx->rx_packet_hash_offset;
- return (u32)data[0] |
- (u32)data[1] << 8 |
- (u32)data[2] << 16 |
- (u32)data[3] << 24;
-#endif
-}
-
-static inline struct efx_rx_buffer *
-efx_rx_buf_next(struct efx_rx_queue *rx_queue, struct efx_rx_buffer *rx_buf)
-{
- if (unlikely(rx_buf == efx_rx_buffer(rx_queue, rx_queue->ptr_mask)))
- return efx_rx_buffer(rx_queue, 0);
- else
- return rx_buf + 1;
-}
-
static inline void efx_sync_rx_buffer(struct efx_nic *efx,
struct efx_rx_buffer *rx_buf,
unsigned int len)
@@ -94,301 +48,6 @@ static inline void efx_sync_rx_buffer(struct efx_nic *efx,
DMA_FROM_DEVICE);
}
-void efx_rx_config_page_split(struct efx_nic *efx)
-{
- efx->rx_page_buf_step = ALIGN(efx->rx_dma_len + efx->rx_ip_align +
- XDP_PACKET_HEADROOM,
- EFX_RX_BUF_ALIGNMENT);
- efx->rx_bufs_per_page = efx->rx_buffer_order ? 1 :
- ((PAGE_SIZE - sizeof(struct efx_rx_page_state)) /
- efx->rx_page_buf_step);
- efx->rx_buffer_truesize = (PAGE_SIZE << efx->rx_buffer_order) /
- efx->rx_bufs_per_page;
- efx->rx_pages_per_batch = DIV_ROUND_UP(EFX_RX_PREFERRED_BATCH,
- efx->rx_bufs_per_page);
-}
-
-/* Check the RX page recycle ring for a page that can be reused. */
-static struct page *efx_reuse_page(struct efx_rx_queue *rx_queue)
-{
- struct efx_nic *efx = rx_queue->efx;
- struct page *page;
- struct efx_rx_page_state *state;
- unsigned index;
-
- index = rx_queue->page_remove & rx_queue->page_ptr_mask;
- page = rx_queue->page_ring[index];
- if (page == NULL)
- return NULL;
-
- rx_queue->page_ring[index] = NULL;
- /* page_remove cannot exceed page_add. */
- if (rx_queue->page_remove != rx_queue->page_add)
- ++rx_queue->page_remove;
-
- /* If page_count is 1 then we hold the only reference to this page. */
- if (page_count(page) == 1) {
- ++rx_queue->page_recycle_count;
- return page;
- } else {
- state = page_address(page);
- dma_unmap_page(&efx->pci_dev->dev, state->dma_addr,
- PAGE_SIZE << efx->rx_buffer_order,
- DMA_FROM_DEVICE);
- put_page(page);
- ++rx_queue->page_recycle_failed;
- }
-
- return NULL;
-}
-
-/**
- * efx_init_rx_buffers - create EFX_RX_BATCH page-based RX buffers
- *
- * @rx_queue: Efx RX queue
- *
- * This allocates a batch of pages, maps them for DMA, and populates
- * struct efx_rx_buffers for each one. Return a negative error code or
- * 0 on success. If a single page can be used for multiple buffers,
- * then the page will either be inserted fully, or not at all.
- */
-static int efx_init_rx_buffers(struct efx_rx_queue *rx_queue, bool atomic)
-{
- struct efx_nic *efx = rx_queue->efx;
- struct efx_rx_buffer *rx_buf;
- struct page *page;
- unsigned int page_offset;
- struct efx_rx_page_state *state;
- dma_addr_t dma_addr;
- unsigned index, count;
-
- count = 0;
- do {
- page = efx_reuse_page(rx_queue);
- if (page == NULL) {
- page = alloc_pages(__GFP_COMP |
- (atomic ? GFP_ATOMIC : GFP_KERNEL),
- efx->rx_buffer_order);
- if (unlikely(page == NULL))
- return -ENOMEM;
- dma_addr =
- dma_map_page(&efx->pci_dev->dev, page, 0,
- PAGE_SIZE << efx->rx_buffer_order,
- DMA_FROM_DEVICE);
- if (unlikely(dma_mapping_error(&efx->pci_dev->dev,
- dma_addr))) {
- __free_pages(page, efx->rx_buffer_order);
- return -EIO;
- }
- state = page_address(page);
- state->dma_addr = dma_addr;
- } else {
- state = page_address(page);
- dma_addr = state->dma_addr;
- }
-
- dma_addr += sizeof(struct efx_rx_page_state);
- page_offset = sizeof(struct efx_rx_page_state);
-
- do {
- index = rx_queue->added_count & rx_queue->ptr_mask;
- rx_buf = efx_rx_buffer(rx_queue, index);
- rx_buf->dma_addr = dma_addr + efx->rx_ip_align +
- XDP_PACKET_HEADROOM;
- rx_buf->page = page;
- rx_buf->page_offset = page_offset + efx->rx_ip_align +
- XDP_PACKET_HEADROOM;
- rx_buf->len = efx->rx_dma_len;
- rx_buf->flags = 0;
- ++rx_queue->added_count;
- get_page(page);
- dma_addr += efx->rx_page_buf_step;
- page_offset += efx->rx_page_buf_step;
- } while (page_offset + efx->rx_page_buf_step <= PAGE_SIZE);
-
- rx_buf->flags = EFX_RX_BUF_LAST_IN_PAGE;
- } while (++count < efx->rx_pages_per_batch);
-
- return 0;
-}
-
-/* Unmap a DMA-mapped page. This function is only called for the final RX
- * buffer in a page.
- */
-static void efx_unmap_rx_buffer(struct efx_nic *efx,
- struct efx_rx_buffer *rx_buf)
-{
- struct page *page = rx_buf->page;
-
- if (page) {
- struct efx_rx_page_state *state = page_address(page);
- dma_unmap_page(&efx->pci_dev->dev,
- state->dma_addr,
- PAGE_SIZE << efx->rx_buffer_order,
- DMA_FROM_DEVICE);
- }
-}
-
-static void efx_free_rx_buffers(struct efx_rx_queue *rx_queue,
- struct efx_rx_buffer *rx_buf,
- unsigned int num_bufs)
-{
- do {
- if (rx_buf->page) {
- put_page(rx_buf->page);
- rx_buf->page = NULL;
- }
- rx_buf = efx_rx_buf_next(rx_queue, rx_buf);
- } while (--num_bufs);
-}
-
-/* Attempt to recycle the page if there is an RX recycle ring; the page can
- * only be added if this is the final RX buffer, to prevent pages being used in
- * the descriptor ring and appearing in the recycle ring simultaneously.
- */
-static void efx_recycle_rx_page(struct efx_channel *channel,
- struct efx_rx_buffer *rx_buf)
-{
- struct page *page = rx_buf->page;
- struct efx_rx_queue *rx_queue = efx_channel_get_rx_queue(channel);
- struct efx_nic *efx = rx_queue->efx;
- unsigned index;
-
- /* Only recycle the page after processing the final buffer. */
- if (!(rx_buf->flags & EFX_RX_BUF_LAST_IN_PAGE))
- return;
-
- index = rx_queue->page_add & rx_queue->page_ptr_mask;
- if (rx_queue->page_ring[index] == NULL) {
- unsigned read_index = rx_queue->page_remove &
- rx_queue->page_ptr_mask;
-
- /* The next slot in the recycle ring is available, but
- * increment page_remove if the read pointer currently
- * points here.
- */
- if (read_index == index)
- ++rx_queue->page_remove;
- rx_queue->page_ring[index] = page;
- ++rx_queue->page_add;
- return;
- }
- ++rx_queue->page_recycle_full;
- efx_unmap_rx_buffer(efx, rx_buf);
- put_page(rx_buf->page);
-}
-
-static void efx_fini_rx_buffer(struct efx_rx_queue *rx_queue,
- struct efx_rx_buffer *rx_buf)
-{
- /* Release the page reference we hold for the buffer. */
- if (rx_buf->page)
- put_page(rx_buf->page);
-
- /* If this is the last buffer in a page, unmap and free it. */
- if (rx_buf->flags & EFX_RX_BUF_LAST_IN_PAGE) {
- efx_unmap_rx_buffer(rx_queue->efx, rx_buf);
- efx_free_rx_buffers(rx_queue, rx_buf, 1);
- }
- rx_buf->page = NULL;
-}
-
-/* Recycle the pages that are used by buffers that have just been received. */
-static void efx_recycle_rx_pages(struct efx_channel *channel,
- struct efx_rx_buffer *rx_buf,
- unsigned int n_frags)
-{
- struct efx_rx_queue *rx_queue = efx_channel_get_rx_queue(channel);
-
- do {
- efx_recycle_rx_page(channel, rx_buf);
- rx_buf = efx_rx_buf_next(rx_queue, rx_buf);
- } while (--n_frags);
-}
-
-static void efx_discard_rx_packet(struct efx_channel *channel,
- struct efx_rx_buffer *rx_buf,
- unsigned int n_frags)
-{
- struct efx_rx_queue *rx_queue = efx_channel_get_rx_queue(channel);
-
- efx_recycle_rx_pages(channel, rx_buf, n_frags);
-
- efx_free_rx_buffers(rx_queue, rx_buf, n_frags);
-}
-
-/**
- * efx_fast_push_rx_descriptors - push new RX descriptors quickly
- * @rx_queue: RX descriptor queue
- *
- * This will aim to fill the RX descriptor queue up to
- * @rx_queue->@max_fill. If there is insufficient atomic
- * memory to do so, a slow fill will be scheduled.
- *
- * The caller must provide serialisation (none is used here). In practise,
- * this means this function must run from the NAPI handler, or be called
- * when NAPI is disabled.
- */
-void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue, bool atomic)
-{
- struct efx_nic *efx = rx_queue->efx;
- unsigned int fill_level, batch_size;
- int space, rc = 0;
-
- if (!rx_queue->refill_enabled)
- return;
-
- /* Calculate current fill level, and exit if we don't need to fill */
- fill_level = (rx_queue->added_count - rx_queue->removed_count);
- EFX_WARN_ON_ONCE_PARANOID(fill_level > rx_queue->efx->rxq_entries);
- if (fill_level >= rx_queue->fast_fill_trigger)
- goto out;
-
- /* Record minimum fill level */
- if (unlikely(fill_level < rx_queue->min_fill)) {
- if (fill_level)
- rx_queue->min_fill = fill_level;
- }
-
- batch_size = efx->rx_pages_per_batch * efx->rx_bufs_per_page;
- space = rx_queue->max_fill - fill_level;
- EFX_WARN_ON_ONCE_PARANOID(space < batch_size);
-
- netif_vdbg(rx_queue->efx, rx_status, rx_queue->efx->net_dev,
- "RX queue %d fast-filling descriptor ring from"
- " level %d to level %d\n",
- efx_rx_queue_index(rx_queue), fill_level,
- rx_queue->max_fill);
-
-
- do {
- rc = efx_init_rx_buffers(rx_queue, atomic);
- if (unlikely(rc)) {
- /* Ensure that we don't leave the rx queue empty */
- efx_schedule_slow_fill(rx_queue);
- goto out;
- }
- } while ((space -= batch_size) >= batch_size);
-
- netif_vdbg(rx_queue->efx, rx_status, rx_queue->efx->net_dev,
- "RX queue %d fast-filled descriptor ring "
- "to level %d\n", efx_rx_queue_index(rx_queue),
- rx_queue->added_count - rx_queue->removed_count);
-
- out:
- if (rx_queue->notified_count != rx_queue->added_count)
- efx_nic_notify_rx_desc(rx_queue);
-}
-
-void efx_rx_slow_fill(struct timer_list *t)
-{
- struct efx_rx_queue *rx_queue = from_timer(rx_queue, t, slow_fill);
-
- /* Post an event to cause NAPI to run and refill the queue */
- efx_nic_generate_fill_event(rx_queue);
- ++rx_queue->slow_fill_count;
-}
-
static void efx_rx_packet__check_len(struct efx_rx_queue *rx_queue,
struct efx_rx_buffer *rx_buf,
int len)
@@ -412,53 +71,6 @@ static void efx_rx_packet__check_len(struct efx_rx_queue *rx_queue,
efx_rx_queue_channel(rx_queue)->n_rx_overlength++;
}
-/* Pass a received packet up through GRO. GRO can handle pages
- * regardless of checksum state and skbs with a good checksum.
- */
-static void
-efx_rx_packet_gro(struct efx_channel *channel, struct efx_rx_buffer *rx_buf,
- unsigned int n_frags, u8 *eh)
-{
- struct napi_struct *napi = &channel->napi_str;
- struct efx_nic *efx = channel->efx;
- struct sk_buff *skb;
-
- skb = napi_get_frags(napi);
- if (unlikely(!skb)) {
- struct efx_rx_queue *rx_queue;
-
- rx_queue = efx_channel_get_rx_queue(channel);
- efx_free_rx_buffers(rx_queue, rx_buf, n_frags);
- return;
- }
-
- if (efx->net_dev->features & NETIF_F_RXHASH)
- skb_set_hash(skb, efx_rx_buf_hash(efx, eh),
- PKT_HASH_TYPE_L3);
- skb->ip_summed = ((rx_buf->flags & EFX_RX_PKT_CSUMMED) ?
- CHECKSUM_UNNECESSARY : CHECKSUM_NONE);
- skb->csum_level = !!(rx_buf->flags & EFX_RX_PKT_CSUM_LEVEL);
-
- for (;;) {
- skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
- rx_buf->page, rx_buf->page_offset,
- rx_buf->len);
- rx_buf->page = NULL;
- skb->len += rx_buf->len;
- if (skb_shinfo(skb)->nr_frags == n_frags)
- break;
-
- rx_buf = efx_rx_buf_next(&channel->rx_queue, rx_buf);
- }
-
- skb->data_len = skb->len;
- skb->truesize += n_frags * efx->rx_buffer_truesize;
-
- skb_record_rx_queue(skb, channel->rx_queue.core_index);
-
- napi_gro_frags(napi);
-}
-
/* Allocate and construct an SKB around page fragments */
static struct sk_buff *efx_rx_mk_skb(struct efx_channel *channel,
struct efx_rx_buffer *rx_buf,
@@ -805,174 +417,6 @@ out:
channel->rx_pkt_n_frags = 0;
}
-int efx_probe_rx_queue(struct efx_rx_queue *rx_queue)
-{
- struct efx_nic *efx = rx_queue->efx;
- unsigned int entries;
- int rc;
-
- /* Create the smallest power-of-two aligned ring */
- entries = max(roundup_pow_of_two(efx->rxq_entries), EFX_MIN_DMAQ_SIZE);
- EFX_WARN_ON_PARANOID(entries > EFX_MAX_DMAQ_SIZE);
- rx_queue->ptr_mask = entries - 1;
-
- netif_dbg(efx, probe, efx->net_dev,
- "creating RX queue %d size %#x mask %#x\n",
- efx_rx_queue_index(rx_queue), efx->rxq_entries,
- rx_queue->ptr_mask);
-
- /* Allocate RX buffers */
- rx_queue->buffer = kcalloc(entries, sizeof(*rx_queue->buffer),
- GFP_KERNEL);
- if (!rx_queue->buffer)
- return -ENOMEM;
-
- rc = efx_nic_probe_rx(rx_queue);
- if (rc) {
- kfree(rx_queue->buffer);
- rx_queue->buffer = NULL;
- }
-
- return rc;
-}
-
-static void efx_init_rx_recycle_ring(struct efx_nic *efx,
- struct efx_rx_queue *rx_queue)
-{
- unsigned int bufs_in_recycle_ring, page_ring_size;
-
- /* Set the RX recycle ring size */
-#ifdef CONFIG_PPC64
- bufs_in_recycle_ring = EFX_RECYCLE_RING_SIZE_IOMMU;
-#else
- if (iommu_present(&pci_bus_type))
- bufs_in_recycle_ring = EFX_RECYCLE_RING_SIZE_IOMMU;
- else
- bufs_in_recycle_ring = EFX_RECYCLE_RING_SIZE_NOIOMMU;
-#endif /* CONFIG_PPC64 */
-
- page_ring_size = roundup_pow_of_two(bufs_in_recycle_ring /
- efx->rx_bufs_per_page);
- rx_queue->page_ring = kcalloc(page_ring_size,
- sizeof(*rx_queue->page_ring), GFP_KERNEL);
- rx_queue->page_ptr_mask = page_ring_size - 1;
-}
-
-void efx_init_rx_queue(struct efx_rx_queue *rx_queue)
-{
- struct efx_nic *efx = rx_queue->efx;
- unsigned int max_fill, trigger, max_trigger;
- int rc = 0;
-
- netif_dbg(rx_queue->efx, drv, rx_queue->efx->net_dev,
- "initialising RX queue %d\n", efx_rx_queue_index(rx_queue));
-
- /* Initialise ptr fields */
- rx_queue->added_count = 0;
- rx_queue->notified_count = 0;
- rx_queue->removed_count = 0;
- rx_queue->min_fill = -1U;
- efx_init_rx_recycle_ring(efx, rx_queue);
-
- rx_queue->page_remove = 0;
- rx_queue->page_add = rx_queue->page_ptr_mask + 1;
- rx_queue->page_recycle_count = 0;
- rx_queue->page_recycle_failed = 0;
- rx_queue->page_recycle_full = 0;
-
- /* Initialise limit fields */
- max_fill = efx->rxq_entries - EFX_RXD_HEAD_ROOM;
- max_trigger =
- max_fill - efx->rx_pages_per_batch * efx->rx_bufs_per_page;
- if (rx_refill_threshold != 0) {
- trigger = max_fill * min(rx_refill_threshold, 100U) / 100U;
- if (trigger > max_trigger)
- trigger = max_trigger;
- } else {
- trigger = max_trigger;
- }
-
- rx_queue->max_fill = max_fill;
- rx_queue->fast_fill_trigger = trigger;
- rx_queue->refill_enabled = true;
-
- /* Initialise XDP queue information */
- rc = xdp_rxq_info_reg(&rx_queue->xdp_rxq_info, efx->net_dev,
- rx_queue->core_index);
-
- if (rc) {
- netif_err(efx, rx_err, efx->net_dev,
- "Failure to initialise XDP queue information rc=%d\n",
- rc);
- efx->xdp_rxq_info_failed = true;
- } else {
- rx_queue->xdp_rxq_info_valid = true;
- }
-
- /* Set up RX descriptor ring */
- efx_nic_init_rx(rx_queue);
-}
-
-void efx_fini_rx_queue(struct efx_rx_queue *rx_queue)
-{
- int i;
- struct efx_nic *efx = rx_queue->efx;
- struct efx_rx_buffer *rx_buf;
-
- netif_dbg(rx_queue->efx, drv, rx_queue->efx->net_dev,
- "shutting down RX queue %d\n", efx_rx_queue_index(rx_queue));
-
- del_timer_sync(&rx_queue->slow_fill);
-
- /* Release RX buffers from the current read ptr to the write ptr */
- if (rx_queue->buffer) {
- for (i = rx_queue->removed_count; i < rx_queue->added_count;
- i++) {
- unsigned index = i & rx_queue->ptr_mask;
- rx_buf = efx_rx_buffer(rx_queue, index);
- efx_fini_rx_buffer(rx_queue, rx_buf);
- }
- }
-
- /* Unmap and release the pages in the recycle ring. Remove the ring. */
- for (i = 0; i <= rx_queue->page_ptr_mask; i++) {
- struct page *page = rx_queue->page_ring[i];
- struct efx_rx_page_state *state;
-
- if (page == NULL)
- continue;
-
- state = page_address(page);
- dma_unmap_page(&efx->pci_dev->dev, state->dma_addr,
- PAGE_SIZE << efx->rx_buffer_order,
- DMA_FROM_DEVICE);
- put_page(page);
- }
- kfree(rx_queue->page_ring);
- rx_queue->page_ring = NULL;
-
- if (rx_queue->xdp_rxq_info_valid)
- xdp_rxq_info_unreg(&rx_queue->xdp_rxq_info);
-
- rx_queue->xdp_rxq_info_valid = false;
-}
-
-void efx_remove_rx_queue(struct efx_rx_queue *rx_queue)
-{
- netif_dbg(rx_queue->efx, drv, rx_queue->efx->net_dev,
- "destroying RX queue %d\n", efx_rx_queue_index(rx_queue));
-
- efx_nic_remove_rx(rx_queue);
-
- kfree(rx_queue->buffer);
- rx_queue->buffer = NULL;
-}
-
-
-module_param(rx_refill_threshold, uint, 0444);
-MODULE_PARM_DESC(rx_refill_threshold,
- "RX descriptor ring refill threshold (%)");
-
#ifdef CONFIG_RFS_ACCEL
static void efx_filter_rfs_work(struct work_struct *data)
@@ -1206,37 +650,3 @@ bool __efx_filter_rfs_expire(struct efx_channel *channel, unsigned int quota)
}
#endif /* CONFIG_RFS_ACCEL */
-
-/**
- * efx_filter_is_mc_recipient - test whether spec is a multicast recipient
- * @spec: Specification to test
- *
- * Return: %true if the specification is a non-drop RX filter that
- * matches a local MAC address I/G bit value of 1 or matches a local
- * IPv4 or IPv6 address value in the respective multicast address
- * range. Otherwise %false.
- */
-bool efx_filter_is_mc_recipient(const struct efx_filter_spec *spec)
-{
- if (!(spec->flags & EFX_FILTER_FLAG_RX) ||
- spec->dmaq_id == EFX_FILTER_RX_DMAQ_ID_DROP)
- return false;
-
- if (spec->match_flags &
- (EFX_FILTER_MATCH_LOC_MAC | EFX_FILTER_MATCH_LOC_MAC_IG) &&
- is_multicast_ether_addr(spec->loc_mac))
- return true;
-
- if ((spec->match_flags &
- (EFX_FILTER_MATCH_ETHER_TYPE | EFX_FILTER_MATCH_LOC_HOST)) ==
- (EFX_FILTER_MATCH_ETHER_TYPE | EFX_FILTER_MATCH_LOC_HOST)) {
- if (spec->ether_type == htons(ETH_P_IP) &&
- ipv4_is_multicast(spec->loc_host[0]))
- return true;
- if (spec->ether_type == htons(ETH_P_IPV6) &&
- ((const u8 *)spec->loc_host)[0] == 0xff)
- return true;
- }
-
- return false;
-}