Nothing lives outside the repo: the bench ixgbe driver source moves in tracked at kernel/ixgbe-sff/ (build artifacts gitignored, load-ixgbe repointed, module build verified from the new home — the reg_ops/ts_bench bench extras are finally versioned), the ice sff_i2c patch is vendored at docs/nics/e810/ice-sff-i2c.patch with its out-of-tree build recipe (TRACE_INCLUDE_PATH fixup, version-matched Makefile), the e810 NVM flash logistics land in the e810 README (exact package name, rollback -m B49691D578EC into the inactive bank, post-flash inventory failing until power cycle is the expected tell), and every ~/work/phydiag-work pointer becomes an inline statement; phydiag-work, ice-sff, e810nvm and the wiitekphy CLI (a duplicate of documented transport+protocol) are deleted
This commit is contained in:
flamingcow
@@ -0,0 +1,566 @@
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// SPDX-License-Identifier: GPL-2.0
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/* Copyright(c) 2018 Intel Corporation. */
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#include <linux/bpf_trace.h>
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#include <net/xdp_sock_drv.h>
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#include <net/xdp.h>
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#include "ixgbe.h"
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#include "ixgbe_txrx_common.h"
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struct xsk_buff_pool *ixgbe_xsk_pool(struct ixgbe_adapter *adapter,
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struct ixgbe_ring *ring)
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{
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bool xdp_on = READ_ONCE(adapter->xdp_prog);
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int qid = ring->ring_idx;
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if (!xdp_on || !test_bit(qid, adapter->af_xdp_zc_qps))
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return NULL;
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return xsk_get_pool_from_qid(adapter->netdev, qid);
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}
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static int ixgbe_xsk_pool_enable(struct ixgbe_adapter *adapter,
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struct xsk_buff_pool *pool,
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u16 qid)
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{
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struct net_device *netdev = adapter->netdev;
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bool if_running;
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int err;
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if (qid >= adapter->num_rx_queues)
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return -EINVAL;
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if (qid >= netdev->real_num_rx_queues ||
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qid >= netdev->real_num_tx_queues)
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return -EINVAL;
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err = xsk_pool_dma_map(pool, &adapter->pdev->dev, IXGBE_RX_DMA_ATTR);
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if (err)
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return err;
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if_running = netif_running(adapter->netdev) &&
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ixgbe_enabled_xdp_adapter(adapter);
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if (if_running)
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ixgbe_txrx_ring_disable(adapter, qid);
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set_bit(qid, adapter->af_xdp_zc_qps);
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if (if_running) {
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ixgbe_txrx_ring_enable(adapter, qid);
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/* Kick start the NAPI context so that receiving will start */
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err = ixgbe_xsk_wakeup(adapter->netdev, qid, XDP_WAKEUP_RX);
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if (err) {
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clear_bit(qid, adapter->af_xdp_zc_qps);
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xsk_pool_dma_unmap(pool, IXGBE_RX_DMA_ATTR);
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return err;
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}
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}
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return 0;
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}
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static int ixgbe_xsk_pool_disable(struct ixgbe_adapter *adapter, u16 qid)
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{
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struct xsk_buff_pool *pool;
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bool if_running;
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pool = xsk_get_pool_from_qid(adapter->netdev, qid);
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if (!pool)
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return -EINVAL;
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if_running = netif_running(adapter->netdev) &&
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ixgbe_enabled_xdp_adapter(adapter);
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if (if_running)
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ixgbe_txrx_ring_disable(adapter, qid);
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clear_bit(qid, adapter->af_xdp_zc_qps);
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xsk_pool_dma_unmap(pool, IXGBE_RX_DMA_ATTR);
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if (if_running)
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ixgbe_txrx_ring_enable(adapter, qid);
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return 0;
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}
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int ixgbe_xsk_pool_setup(struct ixgbe_adapter *adapter,
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struct xsk_buff_pool *pool,
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u16 qid)
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{
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return pool ? ixgbe_xsk_pool_enable(adapter, pool, qid) :
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ixgbe_xsk_pool_disable(adapter, qid);
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}
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static int ixgbe_run_xdp_zc(struct ixgbe_adapter *adapter,
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struct ixgbe_ring *rx_ring,
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struct xdp_buff *xdp)
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{
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int err, result = IXGBE_XDP_PASS;
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struct bpf_prog *xdp_prog;
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struct ixgbe_ring *ring;
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struct xdp_frame *xdpf;
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u32 act;
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xdp_prog = READ_ONCE(rx_ring->xdp_prog);
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act = bpf_prog_run_xdp(xdp_prog, xdp);
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if (likely(act == XDP_REDIRECT)) {
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err = xdp_do_redirect(rx_ring->netdev, xdp, xdp_prog);
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if (!err)
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return IXGBE_XDP_REDIR;
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if (xsk_uses_need_wakeup(rx_ring->xsk_pool) && err == -ENOBUFS)
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result = IXGBE_XDP_EXIT;
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else
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result = IXGBE_XDP_CONSUMED;
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goto out_failure;
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}
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switch (act) {
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case XDP_PASS:
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break;
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case XDP_TX:
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xdpf = xdp_convert_buff_to_frame(xdp);
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if (unlikely(!xdpf))
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goto out_failure;
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ring = ixgbe_determine_xdp_ring(adapter);
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if (static_branch_unlikely(&ixgbe_xdp_locking_key))
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spin_lock(&ring->tx_lock);
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result = ixgbe_xmit_xdp_ring(ring, xdpf);
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if (static_branch_unlikely(&ixgbe_xdp_locking_key))
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spin_unlock(&ring->tx_lock);
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if (result == IXGBE_XDP_CONSUMED)
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goto out_failure;
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break;
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case XDP_DROP:
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result = IXGBE_XDP_CONSUMED;
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break;
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default:
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bpf_warn_invalid_xdp_action(rx_ring->netdev, xdp_prog, act);
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fallthrough;
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case XDP_ABORTED:
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result = IXGBE_XDP_CONSUMED;
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out_failure:
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trace_xdp_exception(rx_ring->netdev, xdp_prog, act);
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}
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return result;
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}
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bool ixgbe_alloc_rx_buffers_zc(struct ixgbe_ring *rx_ring, u16 count)
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{
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union ixgbe_adv_rx_desc *rx_desc;
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struct ixgbe_rx_buffer *bi;
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u16 i = rx_ring->next_to_use;
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dma_addr_t dma;
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bool ok = true;
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/* nothing to do */
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if (!count)
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return true;
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rx_desc = IXGBE_RX_DESC(rx_ring, i);
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bi = &rx_ring->rx_buffer_info[i];
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i -= rx_ring->count;
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do {
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bi->xdp = xsk_buff_alloc(rx_ring->xsk_pool);
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if (!bi->xdp) {
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ok = false;
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break;
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}
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dma = xsk_buff_xdp_get_dma(bi->xdp);
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/* Refresh the desc even if buffer_addrs didn't change
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* because each write-back erases this info.
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*/
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rx_desc->read.pkt_addr = cpu_to_le64(dma);
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rx_desc++;
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bi++;
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i++;
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if (unlikely(!i)) {
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rx_desc = IXGBE_RX_DESC(rx_ring, 0);
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bi = rx_ring->rx_buffer_info;
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i -= rx_ring->count;
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}
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/* clear the length for the next_to_use descriptor */
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rx_desc->wb.upper.length = 0;
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count--;
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} while (count);
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i += rx_ring->count;
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if (rx_ring->next_to_use != i) {
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rx_ring->next_to_use = i;
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/* Force memory writes to complete before letting h/w
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* know there are new descriptors to fetch. (Only
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* applicable for weak-ordered memory model archs,
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* such as IA-64).
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*/
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wmb();
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writel(i, rx_ring->tail);
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}
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return ok;
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}
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static struct sk_buff *ixgbe_construct_skb_zc(struct ixgbe_ring *rx_ring,
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const struct xdp_buff *xdp)
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{
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unsigned int totalsize = xdp->data_end - xdp->data_meta;
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unsigned int metasize = xdp->data - xdp->data_meta;
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struct sk_buff *skb;
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net_prefetch(xdp->data_meta);
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/* allocate a skb to store the frags */
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skb = napi_alloc_skb(&rx_ring->q_vector->napi, totalsize);
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if (unlikely(!skb))
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return NULL;
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memcpy(__skb_put(skb, totalsize), xdp->data_meta,
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ALIGN(totalsize, sizeof(long)));
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if (metasize) {
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skb_metadata_set(skb, metasize);
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__skb_pull(skb, metasize);
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}
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return skb;
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}
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static void ixgbe_inc_ntc(struct ixgbe_ring *rx_ring)
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{
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u32 ntc = rx_ring->next_to_clean + 1;
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ntc = (ntc < rx_ring->count) ? ntc : 0;
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rx_ring->next_to_clean = ntc;
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prefetch(IXGBE_RX_DESC(rx_ring, ntc));
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}
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int ixgbe_clean_rx_irq_zc(struct ixgbe_q_vector *q_vector,
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struct ixgbe_ring *rx_ring,
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const int budget)
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{
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unsigned int total_rx_bytes = 0, total_rx_packets = 0;
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struct ixgbe_adapter *adapter = q_vector->adapter;
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u16 cleaned_count = ixgbe_desc_unused(rx_ring);
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unsigned int xdp_res, xdp_xmit = 0;
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bool failure = false;
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struct sk_buff *skb;
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while (likely(total_rx_packets < budget)) {
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union ixgbe_adv_rx_desc *rx_desc;
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struct ixgbe_rx_buffer *bi;
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unsigned int size;
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/* return some buffers to hardware, one at a time is too slow */
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if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
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failure = failure ||
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!ixgbe_alloc_rx_buffers_zc(rx_ring,
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cleaned_count);
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cleaned_count = 0;
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}
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rx_desc = IXGBE_RX_DESC(rx_ring, rx_ring->next_to_clean);
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size = le16_to_cpu(rx_desc->wb.upper.length);
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if (!size)
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break;
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/* This memory barrier is needed to keep us from reading
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* any other fields out of the rx_desc until we know the
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* descriptor has been written back
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*/
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dma_rmb();
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bi = &rx_ring->rx_buffer_info[rx_ring->next_to_clean];
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if (unlikely(!ixgbe_test_staterr(rx_desc,
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IXGBE_RXD_STAT_EOP))) {
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struct ixgbe_rx_buffer *next_bi;
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xsk_buff_free(bi->xdp);
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bi->xdp = NULL;
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ixgbe_inc_ntc(rx_ring);
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next_bi =
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&rx_ring->rx_buffer_info[rx_ring->next_to_clean];
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next_bi->discard = true;
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continue;
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}
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if (unlikely(bi->discard)) {
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xsk_buff_free(bi->xdp);
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bi->xdp = NULL;
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bi->discard = false;
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ixgbe_inc_ntc(rx_ring);
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continue;
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}
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bi->xdp->data_end = bi->xdp->data + size;
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xsk_buff_dma_sync_for_cpu(bi->xdp);
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xdp_res = ixgbe_run_xdp_zc(adapter, rx_ring, bi->xdp);
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if (likely(xdp_res & (IXGBE_XDP_TX | IXGBE_XDP_REDIR))) {
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xdp_xmit |= xdp_res;
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} else if (xdp_res == IXGBE_XDP_EXIT) {
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failure = true;
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break;
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} else if (xdp_res == IXGBE_XDP_CONSUMED) {
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xsk_buff_free(bi->xdp);
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} else if (xdp_res == IXGBE_XDP_PASS) {
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goto construct_skb;
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}
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bi->xdp = NULL;
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total_rx_packets++;
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total_rx_bytes += size;
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cleaned_count++;
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ixgbe_inc_ntc(rx_ring);
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continue;
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construct_skb:
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/* XDP_PASS path */
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skb = ixgbe_construct_skb_zc(rx_ring, bi->xdp);
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if (!skb) {
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rx_ring->rx_stats.alloc_rx_buff_failed++;
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break;
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}
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xsk_buff_free(bi->xdp);
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bi->xdp = NULL;
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cleaned_count++;
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ixgbe_inc_ntc(rx_ring);
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if (eth_skb_pad(skb))
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continue;
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total_rx_bytes += skb->len;
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total_rx_packets++;
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ixgbe_process_skb_fields(rx_ring, rx_desc, skb);
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ixgbe_rx_skb(q_vector, skb);
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}
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if (xdp_xmit & IXGBE_XDP_REDIR)
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xdp_do_flush();
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if (xdp_xmit & IXGBE_XDP_TX) {
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struct ixgbe_ring *ring = ixgbe_determine_xdp_ring(adapter);
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|
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ixgbe_xdp_ring_update_tail_locked(ring);
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}
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||||
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||||
ixgbe_update_rx_ring_stats(rx_ring, q_vector, total_rx_packets,
|
||||
total_rx_bytes);
|
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|
||||
if (xsk_uses_need_wakeup(rx_ring->xsk_pool)) {
|
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if (failure || rx_ring->next_to_clean == rx_ring->next_to_use)
|
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xsk_set_rx_need_wakeup(rx_ring->xsk_pool);
|
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else
|
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xsk_clear_rx_need_wakeup(rx_ring->xsk_pool);
|
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|
||||
return (int)total_rx_packets;
|
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}
|
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return failure ? budget : (int)total_rx_packets;
|
||||
}
|
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|
||||
void ixgbe_xsk_clean_rx_ring(struct ixgbe_ring *rx_ring)
|
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{
|
||||
struct ixgbe_rx_buffer *bi;
|
||||
u16 i;
|
||||
|
||||
for (i = 0; i < rx_ring->count; i++) {
|
||||
bi = &rx_ring->rx_buffer_info[i];
|
||||
|
||||
if (!bi->xdp)
|
||||
continue;
|
||||
|
||||
xsk_buff_free(bi->xdp);
|
||||
bi->xdp = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
static bool ixgbe_xmit_zc(struct ixgbe_ring *xdp_ring, unsigned int budget)
|
||||
{
|
||||
struct xsk_buff_pool *pool = xdp_ring->xsk_pool;
|
||||
union ixgbe_adv_tx_desc *tx_desc = NULL;
|
||||
struct ixgbe_tx_buffer *tx_bi;
|
||||
bool work_done = true;
|
||||
struct xdp_desc desc;
|
||||
dma_addr_t dma;
|
||||
u32 cmd_type;
|
||||
|
||||
while (likely(budget)) {
|
||||
if (unlikely(!ixgbe_desc_unused(xdp_ring))) {
|
||||
work_done = false;
|
||||
break;
|
||||
}
|
||||
|
||||
if (!netif_carrier_ok(xdp_ring->netdev))
|
||||
break;
|
||||
|
||||
if (!xsk_tx_peek_desc(pool, &desc))
|
||||
break;
|
||||
|
||||
dma = xsk_buff_raw_get_dma(pool, desc.addr);
|
||||
xsk_buff_raw_dma_sync_for_device(pool, dma, desc.len);
|
||||
|
||||
tx_bi = &xdp_ring->tx_buffer_info[xdp_ring->next_to_use];
|
||||
tx_bi->bytecount = desc.len;
|
||||
tx_bi->xdpf = NULL;
|
||||
tx_bi->gso_segs = 1;
|
||||
|
||||
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 |= desc.len | IXGBE_TXD_CMD;
|
||||
tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type);
|
||||
tx_desc->read.olinfo_status =
|
||||
cpu_to_le32(desc.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;
|
||||
|
||||
budget--;
|
||||
}
|
||||
|
||||
if (tx_desc) {
|
||||
ixgbe_xdp_ring_update_tail(xdp_ring);
|
||||
xsk_tx_release(pool);
|
||||
}
|
||||
|
||||
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)
|
||||
{
|
||||
u16 ntc = tx_ring->next_to_clean, ntu = tx_ring->next_to_use;
|
||||
unsigned int total_packets = 0, total_bytes = 0;
|
||||
struct xsk_buff_pool *pool = tx_ring->xsk_pool;
|
||||
union ixgbe_adv_tx_desc *tx_desc;
|
||||
struct ixgbe_tx_buffer *tx_bi;
|
||||
u32 xsk_frames = 0;
|
||||
|
||||
tx_bi = &tx_ring->tx_buffer_info[ntc];
|
||||
tx_desc = IXGBE_TX_DESC(tx_ring, ntc);
|
||||
|
||||
while (ntc != ntu) {
|
||||
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;
|
||||
|
||||
tx_bi++;
|
||||
tx_desc++;
|
||||
ntc++;
|
||||
if (unlikely(ntc == tx_ring->count)) {
|
||||
ntc = 0;
|
||||
tx_bi = tx_ring->tx_buffer_info;
|
||||
tx_desc = IXGBE_TX_DESC(tx_ring, 0);
|
||||
}
|
||||
|
||||
/* issue prefetch for next Tx descriptor */
|
||||
prefetch(tx_desc);
|
||||
}
|
||||
|
||||
tx_ring->next_to_clean = ntc;
|
||||
ixgbe_update_tx_ring_stats(tx_ring, q_vector, total_packets,
|
||||
total_bytes);
|
||||
|
||||
if (xsk_frames)
|
||||
xsk_tx_completed(pool, xsk_frames);
|
||||
|
||||
if (xsk_uses_need_wakeup(pool))
|
||||
xsk_set_tx_need_wakeup(pool);
|
||||
|
||||
return ixgbe_xmit_zc(tx_ring, q_vector->tx.work_limit);
|
||||
}
|
||||
|
||||
int ixgbe_xsk_wakeup(struct net_device *dev, u32 qid, u32 flags)
|
||||
{
|
||||
struct ixgbe_adapter *adapter = ixgbe_from_netdev(dev);
|
||||
struct ixgbe_ring *ring;
|
||||
|
||||
if (test_bit(__IXGBE_DOWN, &adapter->state))
|
||||
return -ENETDOWN;
|
||||
|
||||
if (!READ_ONCE(adapter->xdp_prog))
|
||||
return -EINVAL;
|
||||
|
||||
if (qid >= adapter->num_xdp_queues)
|
||||
return -EINVAL;
|
||||
|
||||
ring = adapter->xdp_ring[qid];
|
||||
|
||||
if (test_bit(__IXGBE_TX_DISABLED, ring->state))
|
||||
return -ENETDOWN;
|
||||
|
||||
if (!ring->xsk_pool)
|
||||
return -EINVAL;
|
||||
|
||||
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 xsk_buff_pool *pool = tx_ring->xsk_pool;
|
||||
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_tx_completed(pool, xsk_frames);
|
||||
}
|
||||
Reference in New Issue
Block a user