1 files changed, 801 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c
new file mode 100644
index 000000000000..65c3e2c979d4
--- /dev/null
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c
@@ -0,0 +1,801 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright(c) 2018 Intel Corporation. */
+
+#include <linux/bpf_trace.h>
+#include <net/xdp_sock.h>
+#include <net/xdp.h>
+
+#include "ixgbe.h"
+#include "ixgbe_txrx_common.h"
+
+struct xdp_umem *ixgbe_xsk_umem(struct ixgbe_adapter *adapter,
+                                struct ixgbe_ring *ring)
+{
+        bool xdp_on = READ_ONCE(adapter->xdp_prog);
+        int qid = ring->ring_idx;
+
+        if (!adapter->xsk_umems || !adapter->xsk_umems[qid] ||
+            qid >= adapter->num_xsk_umems || !xdp_on)
+                return NULL;
+
+        return adapter->xsk_umems[qid];
+}
+
+static int ixgbe_alloc_xsk_umems(struct ixgbe_adapter *adapter)
+{
+        if (adapter->xsk_umems)
+                return 0;
+
+        adapter->num_xsk_umems_used = 0;
+        adapter->num_xsk_umems = adapter->num_rx_queues;
+        adapter->xsk_umems = kcalloc(adapter->num_xsk_umems,
+                                     sizeof(*adapter->xsk_umems),
+                                     GFP_KERNEL);
+        if (!adapter->xsk_umems) {
+                adapter->num_xsk_umems = 0;
+                return -ENOMEM;
+        }
+
+        return 0;
+}
+
+static int ixgbe_add_xsk_umem(struct ixgbe_adapter *adapter,
+                              struct xdp_umem *umem,
+                              u16 qid)
+{
+        int err;
+
+        err = ixgbe_alloc_xsk_umems(adapter);
+        if (err)
+                return err;
+
+        adapter->xsk_umems[qid] = umem;
+        adapter->num_xsk_umems_used++;
+
+        return 0;
+}
+
+static void ixgbe_remove_xsk_umem(struct ixgbe_adapter *adapter, u16 qid)
+{
+        adapter->xsk_umems[qid] = NULL;
+        adapter->num_xsk_umems_used--;
+
+        if (adapter->num_xsk_umems == 0) {
+                kfree(adapter->xsk_umems);
+                adapter->xsk_umems = NULL;
+                adapter->num_xsk_umems = 0;
+        }
+}
+
+static int ixgbe_xsk_umem_dma_map(struct ixgbe_adapter *adapter,
+                                  struct xdp_umem *umem)
+{
+        struct device *dev = &adapter->pdev->dev;
+        unsigned int i, j;
+        dma_addr_t dma;
+
+        for (i = 0; i < umem->npgs; i++) {
+                dma = dma_map_page_attrs(dev, umem->pgs[i], 0, PAGE_SIZE,
+                                         DMA_BIDIRECTIONAL, IXGBE_RX_DMA_ATTR);
+                if (dma_mapping_error(dev, dma))
+                        goto out_unmap;
+
+                umem->pages[i].dma = dma;
+        }
+
+        return 0;
+
+out_unmap:
+        for (j = 0; j < i; j++) {
+                dma_unmap_page_attrs(dev, umem->pages[i].dma, PAGE_SIZE,
+                                     DMA_BIDIRECTIONAL, IXGBE_RX_DMA_ATTR);
+                umem->pages[i].dma = 0;
+        }
+
+        return -1;
+}
+
+static void ixgbe_xsk_umem_dma_unmap(struct ixgbe_adapter *adapter,
+                                     struct xdp_umem *umem)
+{
+        struct device *dev = &adapter->pdev->dev;
+        unsigned int i;
+
+        for (i = 0; i < umem->npgs; i++) {
+                dma_unmap_page_attrs(dev, umem->pages[i].dma, PAGE_SIZE,
+                                     DMA_BIDIRECTIONAL, IXGBE_RX_DMA_ATTR);
+
+                umem->pages[i].dma = 0;
+        }
+}
+
+static int ixgbe_xsk_umem_enable(struct ixgbe_adapter *adapter,
+                                 struct xdp_umem *umem,
+                                 u16 qid)
+{
+        struct xdp_umem_fq_reuse *reuseq;
+        bool if_running;
+        int err;
+
+        if (qid >= adapter->num_rx_queues)
+                return -EINVAL;
+
+        if (adapter->xsk_umems) {
+                if (qid >= adapter->num_xsk_umems)
+                        return -EINVAL;
+                if (adapter->xsk_umems[qid])
+                        return -EBUSY;
+        }
+
+        reuseq = xsk_reuseq_prepare(adapter->rx_ring[0]->count);
+        if (!reuseq)
+                return -ENOMEM;
+
+        xsk_reuseq_free(xsk_reuseq_swap(umem, reuseq));
+
+        err = ixgbe_xsk_umem_dma_map(adapter, umem);
+        if (err)
+                return err;
+
+        if_running = netif_running(adapter->netdev) &&
+                     READ_ONCE(adapter->xdp_prog);
+
+        if (if_running)
+                ixgbe_txrx_ring_disable(adapter, qid);
+
+        err = ixgbe_add_xsk_umem(adapter, umem, qid);
+
+        if (if_running)
+                ixgbe_txrx_ring_enable(adapter, qid);
+
+        return err;
+}
+
+static int ixgbe_xsk_umem_disable(struct ixgbe_adapter *adapter, u16 qid)
+{
+        bool if_running;
+
+        if (!adapter->xsk_umems || qid >= adapter->num_xsk_umems ||
+            !adapter->xsk_umems[qid])
+                return -EINVAL;
+
+        if_running = netif_running(adapter->netdev) &&
+                     READ_ONCE(adapter->xdp_prog);
+
+        if (if_running)
+                ixgbe_txrx_ring_disable(adapter, qid);
+
+        ixgbe_xsk_umem_dma_unmap(adapter, adapter->xsk_umems[qid]);
+        ixgbe_remove_xsk_umem(adapter, qid);
+
+        if (if_running)
+                ixgbe_txrx_ring_enable(adapter, qid);
+
+        return 0;
+}
+
+int ixgbe_xsk_umem_query(struct ixgbe_adapter *adapter, struct xdp_umem **umem,
+                         u16 qid)
+{
+        if (qid >= adapter->num_rx_queues)
+                return -EINVAL;
+
+        if (adapter->xsk_umems) {
+                if (qid >= adapter->num_xsk_umems)
+                        return -EINVAL;
+                *umem = adapter->xsk_umems[qid];
+                return 0;
+        }
+
+        *umem = NULL;
+        return 0;
+}
+
+int ixgbe_xsk_umem_setup(struct ixgbe_adapter *adapter, struct xdp_umem *umem,
+                         u16 qid)
+{
+        return umem ? ixgbe_xsk_umem_enable(adapter, umem, qid) :
+                ixgbe_xsk_umem_disable(adapter, qid);
+}
+
+static int ixgbe_run_xdp_zc(struct ixgbe_adapter *adapter,
+                            struct ixgbe_ring *rx_ring,
+                            struct xdp_buff *xdp)
+{
+        int err, result = IXGBE_XDP_PASS;
+        struct bpf_prog *xdp_prog;
+        struct xdp_frame *xdpf;
+        u32 act;
+
+        rcu_read_lock();
+        xdp_prog = READ_ONCE(rx_ring->xdp_prog);
+        act = bpf_prog_run_xdp(xdp_prog, xdp);
+        xdp->handle += xdp->data - xdp->data_hard_start;
+        switch (act) {
+        case XDP_PASS:
+                break;
+        case XDP_TX:
+                xdpf = convert_to_xdp_frame(xdp);
+                if (unlikely(!xdpf)) {
+                        result = IXGBE_XDP_CONSUMED;
+                        break;
+                }
+                result = ixgbe_xmit_xdp_ring(adapter, xdpf);
+                break;
+        case XDP_REDIRECT:
+                err = xdp_do_redirect(rx_ring->netdev, xdp, xdp_prog);
+                result = !err ? IXGBE_XDP_REDIR : IXGBE_XDP_CONSUMED;
+                break;
+        default:
+                bpf_warn_invalid_xdp_action(act);
+                /* fallthrough */
+        case XDP_ABORTED:
+                trace_xdp_exception(rx_ring->netdev, xdp_prog, act);
+                /* fallthrough -- handle aborts by dropping packet */
+        case XDP_DROP:
+                result = IXGBE_XDP_CONSUMED;
+                break;
+        }
+        rcu_read_unlock();
+        return result;
+}
+
+static struct
+ixgbe_rx_buffer *ixgbe_get_rx_buffer_zc(struct ixgbe_ring *rx_ring,
+                                        unsigned int size)
+{
+        struct ixgbe_rx_buffer *bi;
+
+        bi = &rx_ring->rx_buffer_info[rx_ring->next_to_clean];
+
+        /* we are reusing so sync this buffer for CPU use */
+        dma_sync_single_range_for_cpu(rx_ring->dev,
+                                      bi->dma, 0,
+                                      size,
+                                      DMA_BIDIRECTIONAL);
+
+        return bi;
+}
+
+static void ixgbe_reuse_rx_buffer_zc(struct ixgbe_ring *rx_ring,
+                                     struct ixgbe_rx_buffer *obi)
+{
+        unsigned long mask = (unsigned long)rx_ring->xsk_umem->chunk_mask;
+        u64 hr = rx_ring->xsk_umem->headroom + XDP_PACKET_HEADROOM;
+        u16 nta = rx_ring->next_to_alloc;
+        struct ixgbe_rx_buffer *nbi;
+
+        nbi = &rx_ring->rx_buffer_info[rx_ring->next_to_alloc];
+        /* update, and store next to alloc */
+        nta++;
+        rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0;
+
+        /* transfer page from old buffer to new buffer */
+        nbi->dma = obi->dma & mask;
+        nbi->dma += hr;
+
+        nbi->addr = (void *)((unsigned long)obi->addr & mask);
+        nbi->addr += hr;
+
+        nbi->handle = obi->handle & mask;
+        nbi->handle += rx_ring->xsk_umem->headroom;
+
+        obi->addr = NULL;
+        obi->skb = NULL;
+}
+
+void ixgbe_zca_free(struct zero_copy_allocator *alloc, unsigned long handle)
+{
+        struct ixgbe_rx_buffer *bi;
+        struct ixgbe_ring *rx_ring;
+        u64 hr, mask;
+        u16 nta;
+
+        rx_ring = container_of(alloc, struct ixgbe_ring, zca);
+        hr = rx_ring->xsk_umem->headroom + XDP_PACKET_HEADROOM;
+        mask = rx_ring->xsk_umem->chunk_mask;
+
+        nta = rx_ring->next_to_alloc;
+        bi = rx_ring->rx_buffer_info;
+
+        nta++;
+        rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0;
+
+        handle &= mask;
+
+        bi->dma = xdp_umem_get_dma(rx_ring->xsk_umem, handle);
+        bi->dma += hr;
+
+        bi->addr = xdp_umem_get_data(rx_ring->xsk_umem, handle);
+        bi->addr += hr;
+
+        bi->handle = (u64)handle + rx_ring->xsk_umem->headroom;
+}
+
+static bool ixgbe_alloc_buffer_zc(struct ixgbe_ring *rx_ring,
+                                  struct ixgbe_rx_buffer *bi)
+{
+        struct xdp_umem *umem = rx_ring->xsk_umem;
+        void *addr = bi->addr;
+        u64 handle, hr;
+
+        if (addr)
+                return true;
+
+        if (!xsk_umem_peek_addr(umem, &handle)) {
+                rx_ring->rx_stats.alloc_rx_page_failed++;
+                return false;
+        }
+
+        hr = umem->headroom + XDP_PACKET_HEADROOM;
+
+        bi->dma = xdp_umem_get_dma(umem, handle);
+        bi->dma += hr;
+
+        bi->addr = xdp_umem_get_data(umem, handle);
+        bi->addr += hr;
+
+        bi->handle = handle + umem->headroom;
+
+        xsk_umem_discard_addr(umem);
+        return true;
+}
+
+static bool ixgbe_alloc_buffer_slow_zc(struct ixgbe_ring *rx_ring,
+                                       struct ixgbe_rx_buffer *bi)
+{
+        struct xdp_umem *umem = rx_ring->xsk_umem;
+        u64 handle, hr;
+
+        if (!xsk_umem_peek_addr_rq(umem, &handle)) {
+                rx_ring->rx_stats.alloc_rx_page_failed++;
+                return false;
+        }
+
+        handle &= rx_ring->xsk_umem->chunk_mask;
+
+        hr = umem->headroom + XDP_PACKET_HEADROOM;
+
+        bi->dma = xdp_umem_get_dma(umem, handle);
+        bi->dma += hr;
+
+        bi->addr = xdp_umem_get_data(umem, handle);
+        bi->addr += hr;
+
+        bi->handle = handle + umem->headroom;
+
+        xsk_umem_discard_addr_rq(umem);
+        return true;
+}
+
+static __always_inline bool
+__ixgbe_alloc_rx_buffers_zc(struct ixgbe_ring *rx_ring, u16 cleaned_count,
+                            bool alloc(struct ixgbe_ring *rx_ring,
+                                       struct ixgbe_rx_buffer *bi))
+{
+        union ixgbe_adv_rx_desc *rx_desc;
+        struct ixgbe_rx_buffer *bi;
+        u16 i = rx_ring->next_to_use;
+        bool ok = true;
+
+        /* nothing to do */
+        if (!cleaned_count)
+                return true;
+
+        rx_desc = IXGBE_RX_DESC(rx_ring, i);
+        bi = &rx_ring->rx_buffer_info[i];
+        i -= rx_ring->count;
+
+        do {
+                if (!alloc(rx_ring, bi)) {
+                        ok = false;
+                        break;
+                }
+
+                /* sync the buffer for use by the device */
+                dma_sync_single_range_for_device(rx_ring->dev, bi->dma,
+                                                 bi->page_offset,
+                                                 rx_ring->rx_buf_len,
+                                                 DMA_BIDIRECTIONAL);
+
+                /* Refresh the desc even if buffer_addrs didn't change
+                 * because each write-back erases this info.
+                 */
+                rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
+
+                rx_desc++;
+                bi++;
+                i++;
+                if (unlikely(!i)) {
+                        rx_desc = IXGBE_RX_DESC(rx_ring, 0);
+                        bi = rx_ring->rx_buffer_info;
+                        i -= rx_ring->count;
+                }
+
+                /* clear the length for the next_to_use descriptor */
+                rx_desc->wb.upper.length = 0;
+
+                cleaned_count--;
+        } while (cleaned_count);
+
+        i += rx_ring->count;
+
+        if (rx_ring->next_to_use != i) {
+                rx_ring->next_to_use = i;
+
+                /* update next to alloc since we have filled the ring */
+                rx_ring->next_to_alloc = i;
+
+                /* Force memory writes to complete before letting h/w
+                 * know there are new descriptors to fetch.  (Only
+                 * applicable for weak-ordered memory model archs,
+                 * such as IA-64).
+                 */
+                wmb();
+                writel(i, rx_ring->tail);
+        }
+
+        return ok;
+}
+
+void ixgbe_alloc_rx_buffers_zc(struct ixgbe_ring *rx_ring, u16 count)
+{
+        __ixgbe_alloc_rx_buffers_zc(rx_ring, count,
+                                    ixgbe_alloc_buffer_slow_zc);
+}
+
+static bool ixgbe_alloc_rx_buffers_fast_zc(struct ixgbe_ring *rx_ring,
+                                           u16 count)
+{
+        return __ixgbe_alloc_rx_buffers_zc(rx_ring, count,
+                                           ixgbe_alloc_buffer_zc);
+}
+
+static struct sk_buff *ixgbe_construct_skb_zc(struct ixgbe_ring *rx_ring,
+                                              struct ixgbe_rx_buffer *bi,
+                                              struct xdp_buff *xdp)
+{
+        unsigned int metasize = xdp->data - xdp->data_meta;
+        unsigned int datasize = xdp->data_end - xdp->data;
+        struct sk_buff *skb;
+
+        /* allocate a skb to store the frags */
+        skb = __napi_alloc_skb(&rx_ring->q_vector->napi,
+                               xdp->data_end - xdp->data_hard_start,
+                               GFP_ATOMIC | __GFP_NOWARN);
+        if (unlikely(!skb))
+                return NULL;
+
+        skb_reserve(skb, xdp->data - xdp->data_hard_start);
+        memcpy(__skb_put(skb, datasize), xdp->data, datasize);
+        if (metasize)
+                skb_metadata_set(skb, metasize);
+
+        ixgbe_reuse_rx_buffer_zc(rx_ring, bi);
+        return skb;
+}
+
+static void ixgbe_inc_ntc(struct ixgbe_ring *rx_ring)
+{
+        u32 ntc = rx_ring->next_to_clean + 1;
+
+        ntc = (ntc < rx_ring->count) ? ntc : 0;
+        rx_ring->next_to_clean = ntc;
+        prefetch(IXGBE_RX_DESC(rx_ring, ntc));
+}
+
+int ixgbe_clean_rx_irq_zc(struct ixgbe_q_vector *q_vector,
+                          struct ixgbe_ring *rx_ring,
+                          const int budget)
+{
+        unsigned int total_rx_bytes = 0, total_rx_packets = 0;
+        struct ixgbe_adapter *adapter = q_vector->adapter;
+        u16 cleaned_count = ixgbe_desc_unused(rx_ring);
+        unsigned int xdp_res, xdp_xmit = 0;
+        bool failure = false;
+        struct sk_buff *skb;
+        struct xdp_buff xdp;
+
+        xdp.rxq = &rx_ring->xdp_rxq;
+
+        while (likely(total_rx_packets < budget)) {
+                union ixgbe_adv_rx_desc *rx_desc;
+                struct ixgbe_rx_buffer *bi;
+                unsigned int size;
+
+                /* return some buffers to hardware, one at a time is too slow */
+                if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
+                        failure = failure ||
+                                  !ixgbe_alloc_rx_buffers_fast_zc(rx_ring,
+                                                                 cleaned_count);
+                        cleaned_count = 0;
+                }
+
+                rx_desc = IXGBE_RX_DESC(rx_ring, rx_ring->next_to_clean);
+                size = le16_to_cpu(rx_desc->wb.upper.length);
+                if (!size)
+                        break;
+
+                /* This memory barrier is needed to keep us from reading
+                 * any other fields out of the rx_desc until we know the
+                 * descriptor has been written back
+                 */
+                dma_rmb();
+
+                bi = ixgbe_get_rx_buffer_zc(rx_ring, size);
+
+                if (unlikely(!ixgbe_test_staterr(rx_desc,
+                                                 IXGBE_RXD_STAT_EOP))) {
+                        struct ixgbe_rx_buffer *next_bi;
+
+                        ixgbe_reuse_rx_buffer_zc(rx_ring, bi);
+                        ixgbe_inc_ntc(rx_ring);
+                        next_bi =
+                               &rx_ring->rx_buffer_info[rx_ring->next_to_clean];
+                        next_bi->skb = ERR_PTR(-EINVAL);
+                        continue;
+                }
+
+                if (unlikely(bi->skb)) {
+                        ixgbe_reuse_rx_buffer_zc(rx_ring, bi);
+                        ixgbe_inc_ntc(rx_ring);
+                        continue;
+                }
+
+                xdp.data = bi->addr;
+                xdp.data_meta = xdp.data;
+                xdp.data_hard_start = xdp.data - XDP_PACKET_HEADROOM;
+                xdp.data_end = xdp.data + size;
+                xdp.handle = bi->handle;
+
+                xdp_res = ixgbe_run_xdp_zc(adapter, rx_ring, &xdp);
+
+                if (xdp_res) {
+                        if (xdp_res & (IXGBE_XDP_TX | IXGBE_XDP_REDIR)) {
+                                xdp_xmit |= xdp_res;
+                                bi->addr = NULL;
+                                bi->skb = NULL;
+                        } else {
+                                ixgbe_reuse_rx_buffer_zc(rx_ring, bi);
+                        }
+                        total_rx_packets++;
+                        total_rx_bytes += size;
+
+                        cleaned_count++;
+                        ixgbe_inc_ntc(rx_ring);
+                        continue;
+                }
+
+                /* XDP_PASS path */
+                skb = ixgbe_construct_skb_zc(rx_ring, bi, &xdp);
+                if (!skb) {
+                        rx_ring->rx_stats.alloc_rx_buff_failed++;
+                        break;
+                }
+
+                cleaned_count++;
+                ixgbe_inc_ntc(rx_ring);
+
+                if (eth_skb_pad(skb))
+                        continue;
+
+                total_rx_bytes += skb->len;
+                total_rx_packets++;
+
+                ixgbe_process_skb_fields(rx_ring, rx_desc, skb);
+                ixgbe_rx_skb(q_vector, skb);
+        }
+
+        if (xdp_xmit & IXGBE_XDP_REDIR)
+                xdp_do_flush_map();
+
+        if (xdp_xmit & IXGBE_XDP_TX) {
+                struct ixgbe_ring *ring = adapter->xdp_ring[smp_processor_id()];
+
+                /* Force memory writes to complete before letting h/w
+                 * know there are new descriptors to fetch.
+                 */
+                wmb();
+                writel(ring->next_to_use, ring->tail);
+        }
+
+        u64_stats_update_begin(&rx_ring->syncp);
+        rx_ring->stats.packets += total_rx_packets;
+        rx_ring->stats.bytes += total_rx_bytes;
+        u64_stats_update_end(&rx_ring->syncp);
+        q_vector->rx.total_packets += total_rx_packets;
+        q_vector->rx.total_bytes += total_rx_bytes;
+
+        return failure ? budget : (int)total_rx_packets;
+}
+
+void ixgbe_xsk_clean_rx_ring(struct ixgbe_ring *rx_ring)
+{
+        u16 i = rx_ring->next_to_clean;
+        struct ixgbe_rx_buffer *bi = &rx_ring->rx_buffer_info[i];
+
+        while (i != rx_ring->next_to_alloc) {
+                xsk_umem_fq_reuse(rx_ring->xsk_umem, bi->handle);
+                i++;
+                bi++;
+                if (i == rx_ring->count) {
+                        i = 0;
+                        bi = rx_ring->rx_buffer_info;
+                }
+        }
+}
+
+static bool ixgbe_xmit_zc(struct ixgbe_ring *xdp_ring, unsigned int budget)
+{
+        union ixgbe_adv_tx_desc *tx_desc = NULL;
+        struct ixgbe_tx_buffer *tx_bi;
+        bool work_done = true;
+        u32 len, cmd_type;
+        dma_addr_t dma;
+
+        while (budget-- > 0) {
+                if (unlikely(!ixgbe_desc_unused(xdp_ring))) {
+                        work_done = false;
+                        break;
+                }
+
+                if (!xsk_umem_consume_tx(xdp_ring->xsk_umem, &dma, &len))
+                        break;
+
+                dma_sync_single_for_device(xdp_ring->dev, dma, len,
+                                           DMA_BIDIRECTIONAL);
+
+                tx_bi = &xdp_ring->tx_buffer_info[xdp_ring->next_to_use];
+                tx_bi->bytecount = len;
+                tx_bi->xdpf = NULL;
+
+                tx_desc = IXGBE_TX_DESC(xdp_ring, xdp_ring->next_to_use);
+                tx_desc->read.buffer_addr = cpu_to_le64(dma);
+
+                /* put descriptor type bits */
+                cmd_type = IXGBE_ADVTXD_DTYP_DATA |
+                           IXGBE_ADVTXD_DCMD_DEXT |
+                           IXGBE_ADVTXD_DCMD_IFCS;
+                cmd_type |= len | IXGBE_TXD_CMD;
+                tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type);
+                tx_desc->read.olinfo_status =
+                        cpu_to_le32(len << IXGBE_ADVTXD_PAYLEN_SHIFT);
+
+                xdp_ring->next_to_use++;
+                if (xdp_ring->next_to_use == xdp_ring->count)
+                        xdp_ring->next_to_use = 0;
+        }
+
+        if (tx_desc) {
+                ixgbe_xdp_ring_update_tail(xdp_ring);
+                xsk_umem_consume_tx_done(xdp_ring->xsk_umem);
+        }
+
+        return !!budget && work_done;
+}
+
+static void ixgbe_clean_xdp_tx_buffer(struct ixgbe_ring *tx_ring,
+                                      struct ixgbe_tx_buffer *tx_bi)
+{
+        xdp_return_frame(tx_bi->xdpf);
+        dma_unmap_single(tx_ring->dev,
+                         dma_unmap_addr(tx_bi, dma),
+                         dma_unmap_len(tx_bi, len), DMA_TO_DEVICE);
+        dma_unmap_len_set(tx_bi, len, 0);
+}
+
+bool ixgbe_clean_xdp_tx_irq(struct ixgbe_q_vector *q_vector,
+                            struct ixgbe_ring *tx_ring, int napi_budget)
+{
+        unsigned int total_packets = 0, total_bytes = 0;
+        u32 i = tx_ring->next_to_clean, xsk_frames = 0;
+        unsigned int budget = q_vector->tx.work_limit;
+        struct xdp_umem *umem = tx_ring->xsk_umem;
+        union ixgbe_adv_tx_desc *tx_desc;
+        struct ixgbe_tx_buffer *tx_bi;
+        bool xmit_done;
+
+        tx_bi = &tx_ring->tx_buffer_info[i];
+        tx_desc = IXGBE_TX_DESC(tx_ring, i);
+        i -= tx_ring->count;
+
+        do {
+                if (!(tx_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)))
+                        break;
+
+                total_bytes += tx_bi->bytecount;
+                total_packets += tx_bi->gso_segs;
+
+                if (tx_bi->xdpf)
+                        ixgbe_clean_xdp_tx_buffer(tx_ring, tx_bi);
+                else
+                        xsk_frames++;
+
+                tx_bi->xdpf = NULL;
+                total_bytes += tx_bi->bytecount;
+
+                tx_bi++;
+                tx_desc++;
+                i++;
+                if (unlikely(!i)) {
+                        i -= tx_ring->count;
+                        tx_bi = tx_ring->tx_buffer_info;
+                        tx_desc = IXGBE_TX_DESC(tx_ring, 0);
+                }
+
+                /* issue prefetch for next Tx descriptor */
+                prefetch(tx_desc);
+
+                /* update budget accounting */
+                budget--;
+        } while (likely(budget));
+
+        i += tx_ring->count;
+        tx_ring->next_to_clean = i;
+
+        u64_stats_update_begin(&tx_ring->syncp);
+        tx_ring->stats.bytes += total_bytes;
+        tx_ring->stats.packets += total_packets;
+        u64_stats_update_end(&tx_ring->syncp);
+        q_vector->tx.total_bytes += total_bytes;
+        q_vector->tx.total_packets += total_packets;
+
+        if (xsk_frames)
+                xsk_umem_complete_tx(umem, xsk_frames);
+
+        xmit_done = ixgbe_xmit_zc(tx_ring, q_vector->tx.work_limit);
+        return budget > 0 && xmit_done;
+}
+
+int ixgbe_xsk_async_xmit(struct net_device *dev, u32 qid)
+{
+        struct ixgbe_adapter *adapter = netdev_priv(dev);
+        struct ixgbe_ring *ring;
+
+        if (test_bit(__IXGBE_DOWN, &adapter->state))
+                return -ENETDOWN;
+
+        if (!READ_ONCE(adapter->xdp_prog))
+                return -ENXIO;
+
+        if (qid >= adapter->num_xdp_queues)
+                return -ENXIO;
+
+        if (!adapter->xsk_umems || !adapter->xsk_umems[qid])
+                return -ENXIO;
+
+        ring = adapter->xdp_ring[qid];
+        if (!napi_if_scheduled_mark_missed(&ring->q_vector->napi)) {
+                u64 eics = BIT_ULL(ring->q_vector->v_idx);
+
+                ixgbe_irq_rearm_queues(adapter, eics);
+        }
+
+        return 0;
+}
+
+void ixgbe_xsk_clean_tx_ring(struct ixgbe_ring *tx_ring)
+{
+        u16 ntc = tx_ring->next_to_clean, ntu = tx_ring->next_to_use;
+        struct xdp_umem *umem = tx_ring->xsk_umem;
+        struct ixgbe_tx_buffer *tx_bi;
+        u32 xsk_frames = 0;
+
+        while (ntc != ntu) {
+                tx_bi = &tx_ring->tx_buffer_info[ntc];
+
+                if (tx_bi->xdpf)
+                        ixgbe_clean_xdp_tx_buffer(tx_ring, tx_bi);
+                else
+                        xsk_frames++;
+
+                tx_bi->xdpf = NULL;
+
+                ntc++;
+                if (ntc == tx_ring->count)
+                        ntc = 0;
+        }
+
+        if (xsk_frames)
+                xsk_umem_complete_tx(umem, xsk_frames);
+}