diff options
Diffstat (limited to 'drivers/net/ethernet/intel/ice/ice_xsk.c')
-rw-r--r-- | drivers/net/ethernet/intel/ice/ice_xsk.c | 1051 |
1 files changed, 470 insertions, 581 deletions
diff --git a/drivers/net/ethernet/intel/ice/ice_xsk.c b/drivers/net/ethernet/intel/ice/ice_xsk.c index 4d3407bbd4c4..056c904b83cc 100644 --- a/drivers/net/ethernet/intel/ice/ice_xsk.c +++ b/drivers/net/ethernet/intel/ice/ice_xsk.c @@ -2,7 +2,7 @@ /* Copyright (c) 2019, Intel Corporation. */ #include <linux/bpf_trace.h> -#include <net/xdp_sock.h> +#include <net/xdp_sock_drv.h> #include <net/xdp.h> #include "ice.h" #include "ice_base.h" @@ -12,6 +12,11 @@ #include "ice_txrx_lib.h" #include "ice_lib.h" +static struct xdp_buff **ice_xdp_buf(struct ice_rx_ring *rx_ring, u32 idx) +{ + return &rx_ring->xdp_buf[idx]; +} + /** * ice_qp_reset_stats - Resets all stats for rings of given index * @vsi: VSI that contains rings of interest @@ -36,8 +41,10 @@ static void ice_qp_reset_stats(struct ice_vsi *vsi, u16 q_idx) static void ice_qp_clean_rings(struct ice_vsi *vsi, u16 q_idx) { ice_clean_tx_ring(vsi->tx_rings[q_idx]); - if (ice_is_xdp_ena_vsi(vsi)) + if (ice_is_xdp_ena_vsi(vsi)) { + synchronize_rcu(); ice_clean_tx_ring(vsi->xdp_rings[q_idx]); + } ice_clean_rx_ring(vsi->rx_rings[q_idx]); } @@ -67,7 +74,7 @@ ice_qvec_toggle_napi(struct ice_vsi *vsi, struct ice_q_vector *q_vector, * @q_vector: queue vector */ static void -ice_qvec_dis_irq(struct ice_vsi *vsi, struct ice_ring *rx_ring, +ice_qvec_dis_irq(struct ice_vsi *vsi, struct ice_rx_ring *rx_ring, struct ice_q_vector *q_vector) { struct ice_pf *pf = vsi->back; @@ -104,19 +111,17 @@ ice_qvec_cfg_msix(struct ice_vsi *vsi, struct ice_q_vector *q_vector) u16 reg_idx = q_vector->reg_idx; struct ice_pf *pf = vsi->back; struct ice_hw *hw = &pf->hw; - struct ice_ring *ring; + struct ice_tx_ring *tx_ring; + struct ice_rx_ring *rx_ring; ice_cfg_itr(hw, q_vector); - wr32(hw, GLINT_RATE(reg_idx), - ice_intrl_usec_to_reg(q_vector->intrl, hw->intrl_gran)); - - ice_for_each_ring(ring, q_vector->tx) - ice_cfg_txq_interrupt(vsi, ring->reg_idx, reg_idx, + ice_for_each_tx_ring(tx_ring, q_vector->tx) + ice_cfg_txq_interrupt(vsi, tx_ring->reg_idx, reg_idx, q_vector->tx.itr_idx); - ice_for_each_ring(ring, q_vector->rx) - ice_cfg_rxq_interrupt(vsi, ring->reg_idx, reg_idx, + ice_for_each_rx_ring(rx_ring, q_vector->rx) + ice_cfg_rxq_interrupt(vsi, rx_ring->reg_idx, reg_idx, q_vector->rx.itr_idx); ice_flush(hw); @@ -147,8 +152,9 @@ static void ice_qvec_ena_irq(struct ice_vsi *vsi, struct ice_q_vector *q_vector) static int ice_qp_dis(struct ice_vsi *vsi, u16 q_idx) { struct ice_txq_meta txq_meta = { }; - struct ice_ring *tx_ring, *rx_ring; struct ice_q_vector *q_vector; + struct ice_tx_ring *tx_ring; + struct ice_rx_ring *rx_ring; int timeout = 50; int err; @@ -159,7 +165,7 @@ static int ice_qp_dis(struct ice_vsi *vsi, u16 q_idx) rx_ring = vsi->rx_rings[q_idx]; q_vector = rx_ring->q_vector; - while (test_and_set_bit(__ICE_CFG_BUSY, vsi->state)) { + while (test_and_set_bit(ICE_CFG_BUSY, vsi->state)) { timeout--; if (!timeout) return -EBUSY; @@ -174,7 +180,7 @@ static int ice_qp_dis(struct ice_vsi *vsi, u16 q_idx) if (err) return err; if (ice_is_xdp_ena_vsi(vsi)) { - struct ice_ring *xdp_ring = vsi->xdp_rings[q_idx]; + struct ice_tx_ring *xdp_ring = vsi->xdp_rings[q_idx]; memset(&txq_meta, 0, sizeof(txq_meta)); ice_fill_txq_meta(vsi, xdp_ring, &txq_meta); @@ -183,9 +189,10 @@ static int ice_qp_dis(struct ice_vsi *vsi, u16 q_idx) if (err) return err; } - err = ice_vsi_ctrl_rx_ring(vsi, false, q_idx); + err = ice_vsi_ctrl_one_rx_ring(vsi, false, q_idx, true); if (err) return err; + ice_clean_rx_ring(rx_ring); ice_qvec_toggle_napi(vsi, q_vector, false); ice_qp_clean_rings(vsi, q_idx); @@ -204,14 +211,17 @@ static int ice_qp_dis(struct ice_vsi *vsi, u16 q_idx) static int ice_qp_ena(struct ice_vsi *vsi, u16 q_idx) { struct ice_aqc_add_tx_qgrp *qg_buf; - struct ice_ring *tx_ring, *rx_ring; struct ice_q_vector *q_vector; + struct ice_tx_ring *tx_ring; + struct ice_rx_ring *rx_ring; + u16 size; int err; if (q_idx >= vsi->num_rxq || q_idx >= vsi->num_txq) return -EINVAL; - qg_buf = kzalloc(sizeof(*qg_buf), GFP_KERNEL); + size = struct_size(qg_buf, txqs, 1); + qg_buf = kzalloc(size, GFP_KERNEL); if (!qg_buf) return -ENOMEM; @@ -226,28 +236,28 @@ static int ice_qp_ena(struct ice_vsi *vsi, u16 q_idx) goto free_buf; if (ice_is_xdp_ena_vsi(vsi)) { - struct ice_ring *xdp_ring = vsi->xdp_rings[q_idx]; + struct ice_tx_ring *xdp_ring = vsi->xdp_rings[q_idx]; - memset(qg_buf, 0, sizeof(*qg_buf)); + memset(qg_buf, 0, size); qg_buf->num_txqs = 1; err = ice_vsi_cfg_txq(vsi, xdp_ring, qg_buf); if (err) goto free_buf; ice_set_ring_xdp(xdp_ring); - xdp_ring->xsk_umem = ice_xsk_umem(xdp_ring); + ice_tx_xsk_pool(vsi, q_idx); } - err = ice_setup_rx_ctx(rx_ring); + err = ice_vsi_cfg_rxq(rx_ring); if (err) goto free_buf; ice_qvec_cfg_msix(vsi, q_vector); - err = ice_vsi_ctrl_rx_ring(vsi, true, q_idx); + err = ice_vsi_ctrl_one_rx_ring(vsi, true, q_idx, true); if (err) goto free_buf; - clear_bit(__ICE_CFG_BUSY, vsi->state); + clear_bit(ICE_CFG_BUSY, vsi->state); ice_qvec_toggle_napi(vsi, q_vector, true); ice_qvec_ena_irq(vsi, q_vector); @@ -258,431 +268,281 @@ free_buf: } /** - * ice_xsk_alloc_umems - allocate a UMEM region for an XDP socket - * @vsi: VSI to allocate the UMEM on + * ice_xsk_pool_disable - disable a buffer pool region + * @vsi: Current VSI + * @qid: queue ID * - * Returns 0 on success, negative on error + * Returns 0 on success, negative on failure */ -static int ice_xsk_alloc_umems(struct ice_vsi *vsi) +static int ice_xsk_pool_disable(struct ice_vsi *vsi, u16 qid) { - if (vsi->xsk_umems) - return 0; + struct xsk_buff_pool *pool = xsk_get_pool_from_qid(vsi->netdev, qid); - vsi->xsk_umems = kcalloc(vsi->num_xsk_umems, sizeof(*vsi->xsk_umems), - GFP_KERNEL); + if (!pool) + return -EINVAL; - if (!vsi->xsk_umems) { - vsi->num_xsk_umems = 0; - return -ENOMEM; - } + clear_bit(qid, vsi->af_xdp_zc_qps); + xsk_pool_dma_unmap(pool, ICE_RX_DMA_ATTR); return 0; } /** - * ice_xsk_add_umem - add a UMEM region for XDP sockets - * @vsi: VSI to which the UMEM will be added - * @umem: pointer to a requested UMEM region + * ice_xsk_pool_enable - enable a buffer pool region + * @vsi: Current VSI + * @pool: pointer to a requested buffer pool region * @qid: queue ID * - * Returns 0 on success, negative on error + * Returns 0 on success, negative on failure */ -static int ice_xsk_add_umem(struct ice_vsi *vsi, struct xdp_umem *umem, u16 qid) +static int +ice_xsk_pool_enable(struct ice_vsi *vsi, struct xsk_buff_pool *pool, u16 qid) { int err; - err = ice_xsk_alloc_umems(vsi); + if (vsi->type != ICE_VSI_PF) + return -EINVAL; + + if (qid >= vsi->netdev->real_num_rx_queues || + qid >= vsi->netdev->real_num_tx_queues) + return -EINVAL; + + err = xsk_pool_dma_map(pool, ice_pf_to_dev(vsi->back), + ICE_RX_DMA_ATTR); if (err) return err; - vsi->xsk_umems[qid] = umem; - vsi->num_xsk_umems_used++; + set_bit(qid, vsi->af_xdp_zc_qps); return 0; } /** - * ice_xsk_remove_umem - Remove an UMEM for a certain ring/qid - * @vsi: VSI from which the VSI will be removed - * @qid: Ring/qid associated with the UMEM - */ -static void ice_xsk_remove_umem(struct ice_vsi *vsi, u16 qid) -{ - vsi->xsk_umems[qid] = NULL; - vsi->num_xsk_umems_used--; - - if (vsi->num_xsk_umems_used == 0) { - kfree(vsi->xsk_umems); - vsi->xsk_umems = NULL; - vsi->num_xsk_umems = 0; - } -} - -/** - * ice_xsk_umem_dma_map - DMA map UMEM region for XDP sockets - * @vsi: VSI to map the UMEM region - * @umem: UMEM to map + * ice_realloc_rx_xdp_bufs - reallocate for either XSK or normal buffer + * @rx_ring: Rx ring + * @pool_present: is pool for XSK present * - * Returns 0 on success, negative on error - */ -static int ice_xsk_umem_dma_map(struct ice_vsi *vsi, struct xdp_umem *umem) -{ - struct ice_pf *pf = vsi->back; - struct device *dev; - unsigned int i; - - dev = ice_pf_to_dev(pf); - for (i = 0; i < umem->npgs; i++) { - dma_addr_t dma = dma_map_page_attrs(dev, umem->pgs[i], 0, - PAGE_SIZE, - DMA_BIDIRECTIONAL, - ICE_RX_DMA_ATTR); - if (dma_mapping_error(dev, dma)) { - dev_dbg(dev, "XSK UMEM DMA mapping error on page num %d\n", - i); - goto out_unmap; - } - - umem->pages[i].dma = dma; - } - - return 0; - -out_unmap: - for (; i > 0; i--) { - dma_unmap_page_attrs(dev, umem->pages[i].dma, PAGE_SIZE, - DMA_BIDIRECTIONAL, ICE_RX_DMA_ATTR); - umem->pages[i].dma = 0; - } - - return -EFAULT; -} - -/** - * ice_xsk_umem_dma_unmap - DMA unmap UMEM region for XDP sockets - * @vsi: VSI from which the UMEM will be unmapped - * @umem: UMEM to unmap + * Try allocating memory and return ENOMEM, if failed to allocate. + * If allocation was successful, substitute buffer with allocated one. + * Returns 0 on success, negative on failure */ -static void ice_xsk_umem_dma_unmap(struct ice_vsi *vsi, struct xdp_umem *umem) +static int +ice_realloc_rx_xdp_bufs(struct ice_rx_ring *rx_ring, bool pool_present) { - struct ice_pf *pf = vsi->back; - struct device *dev; - unsigned int i; + size_t elem_size = pool_present ? sizeof(*rx_ring->xdp_buf) : + sizeof(*rx_ring->rx_buf); + void *sw_ring = kcalloc(rx_ring->count, elem_size, GFP_KERNEL); - dev = ice_pf_to_dev(pf); - for (i = 0; i < umem->npgs; i++) { - dma_unmap_page_attrs(dev, umem->pages[i].dma, PAGE_SIZE, - DMA_BIDIRECTIONAL, ICE_RX_DMA_ATTR); + if (!sw_ring) + return -ENOMEM; - umem->pages[i].dma = 0; + if (pool_present) { + kfree(rx_ring->rx_buf); + rx_ring->rx_buf = NULL; + rx_ring->xdp_buf = sw_ring; + } else { + kfree(rx_ring->xdp_buf); + rx_ring->xdp_buf = NULL; + rx_ring->rx_buf = sw_ring; } -} - -/** - * ice_xsk_umem_disable - disable a UMEM region - * @vsi: Current VSI - * @qid: queue ID - * - * Returns 0 on success, negative on failure - */ -static int ice_xsk_umem_disable(struct ice_vsi *vsi, u16 qid) -{ - if (!vsi->xsk_umems || qid >= vsi->num_xsk_umems || - !vsi->xsk_umems[qid]) - return -EINVAL; - - ice_xsk_umem_dma_unmap(vsi, vsi->xsk_umems[qid]); - ice_xsk_remove_umem(vsi, qid); return 0; } /** - * ice_xsk_umem_enable - enable a UMEM region + * ice_realloc_zc_buf - reallocate XDP ZC queue pairs * @vsi: Current VSI - * @umem: pointer to a requested UMEM region - * @qid: queue ID + * @zc: is zero copy set * + * Reallocate buffer for rx_rings that might be used by XSK. + * XDP requires more memory, than rx_buf provides. * Returns 0 on success, negative on failure */ -static int -ice_xsk_umem_enable(struct ice_vsi *vsi, struct xdp_umem *umem, u16 qid) +int ice_realloc_zc_buf(struct ice_vsi *vsi, bool zc) { - struct xdp_umem_fq_reuse *reuseq; - int err; - - if (vsi->type != ICE_VSI_PF) - return -EINVAL; - - if (!vsi->num_xsk_umems) - vsi->num_xsk_umems = min_t(u16, vsi->num_rxq, vsi->num_txq); - if (qid >= vsi->num_xsk_umems) - return -EINVAL; - - if (vsi->xsk_umems && vsi->xsk_umems[qid]) - return -EBUSY; - - reuseq = xsk_reuseq_prepare(vsi->rx_rings[0]->count); - if (!reuseq) - return -ENOMEM; - - xsk_reuseq_free(xsk_reuseq_swap(umem, reuseq)); - - err = ice_xsk_umem_dma_map(vsi, umem); - if (err) - return err; - - err = ice_xsk_add_umem(vsi, umem, qid); - if (err) - return err; + struct ice_rx_ring *rx_ring; + unsigned long q; + + for_each_set_bit(q, vsi->af_xdp_zc_qps, + max_t(int, vsi->alloc_txq, vsi->alloc_rxq)) { + rx_ring = vsi->rx_rings[q]; + if (ice_realloc_rx_xdp_bufs(rx_ring, zc)) + return -ENOMEM; + } return 0; } /** - * ice_xsk_umem_setup - enable/disable a UMEM region depending on its state + * ice_xsk_pool_setup - enable/disable a buffer pool region depending on its state * @vsi: Current VSI - * @umem: UMEM to enable/associate to a ring, NULL to disable + * @pool: buffer pool to enable/associate to a ring, NULL to disable * @qid: queue ID * * Returns 0 on success, negative on failure */ -int ice_xsk_umem_setup(struct ice_vsi *vsi, struct xdp_umem *umem, u16 qid) +int ice_xsk_pool_setup(struct ice_vsi *vsi, struct xsk_buff_pool *pool, u16 qid) { - bool if_running, umem_present = !!umem; - int ret = 0, umem_failure = 0; + bool if_running, pool_present = !!pool; + int ret = 0, pool_failure = 0; + + if (qid >= vsi->num_rxq || qid >= vsi->num_txq) { + netdev_err(vsi->netdev, "Please use queue id in scope of combined queues count\n"); + pool_failure = -EINVAL; + goto failure; + } if_running = netif_running(vsi->netdev) && ice_is_xdp_ena_vsi(vsi); if (if_running) { + struct ice_rx_ring *rx_ring = vsi->rx_rings[qid]; + ret = ice_qp_dis(vsi, qid); if (ret) { - netdev_err(vsi->netdev, "ice_qp_dis error = %d", ret); - goto xsk_umem_if_up; + netdev_err(vsi->netdev, "ice_qp_dis error = %d\n", ret); + goto xsk_pool_if_up; } + + ret = ice_realloc_rx_xdp_bufs(rx_ring, pool_present); + if (ret) + goto xsk_pool_if_up; } - umem_failure = umem_present ? ice_xsk_umem_enable(vsi, umem, qid) : - ice_xsk_umem_disable(vsi, qid); + pool_failure = pool_present ? ice_xsk_pool_enable(vsi, pool, qid) : + ice_xsk_pool_disable(vsi, qid); -xsk_umem_if_up: +xsk_pool_if_up: if (if_running) { ret = ice_qp_ena(vsi, qid); - if (!ret && umem_present) - napi_schedule(&vsi->xdp_rings[qid]->q_vector->napi); + if (!ret && pool_present) + napi_schedule(&vsi->rx_rings[qid]->xdp_ring->q_vector->napi); else if (ret) - netdev_err(vsi->netdev, "ice_qp_ena error = %d", ret); + netdev_err(vsi->netdev, "ice_qp_ena error = %d\n", ret); } - if (umem_failure) { - netdev_err(vsi->netdev, "Could not %sable UMEM, error = %d", - umem_present ? "en" : "dis", umem_failure); - return umem_failure; +failure: + if (pool_failure) { + netdev_err(vsi->netdev, "Could not %sable buffer pool, error = %d\n", + pool_present ? "en" : "dis", pool_failure); + return pool_failure; } return ret; } /** - * ice_zca_free - Callback for MEM_TYPE_ZERO_COPY allocations - * @zca: zero-cpoy allocator - * @handle: Buffer handle - */ -void ice_zca_free(struct zero_copy_allocator *zca, unsigned long handle) -{ - struct ice_rx_buf *rx_buf; - struct ice_ring *rx_ring; - struct xdp_umem *umem; - u64 hr, mask; - u16 nta; - - rx_ring = container_of(zca, struct ice_ring, zca); - umem = rx_ring->xsk_umem; - hr = umem->headroom + XDP_PACKET_HEADROOM; - - mask = umem->chunk_mask; - - nta = rx_ring->next_to_alloc; - rx_buf = &rx_ring->rx_buf[nta]; - - nta++; - rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0; - - handle &= mask; - - rx_buf->dma = xdp_umem_get_dma(umem, handle); - rx_buf->dma += hr; - - rx_buf->addr = xdp_umem_get_data(umem, handle); - rx_buf->addr += hr; - - rx_buf->handle = (u64)handle + umem->headroom; -} - -/** - * ice_alloc_buf_fast_zc - Retrieve buffer address from XDP umem - * @rx_ring: ring with an xdp_umem bound to it - * @rx_buf: buffer to which xsk page address will be assigned - * - * This function allocates an Rx buffer in the hot path. - * The buffer can come from fill queue or recycle queue. + * ice_fill_rx_descs - pick buffers from XSK buffer pool and use it + * @pool: XSK Buffer pool to pull the buffers from + * @xdp: SW ring of xdp_buff that will hold the buffers + * @rx_desc: Pointer to Rx descriptors that will be filled + * @count: The number of buffers to allocate * - * Returns true if an assignment was successful, false if not. - */ -static __always_inline bool -ice_alloc_buf_fast_zc(struct ice_ring *rx_ring, struct ice_rx_buf *rx_buf) -{ - struct xdp_umem *umem = rx_ring->xsk_umem; - void *addr = rx_buf->addr; - u64 handle, hr; - - if (addr) { - rx_ring->rx_stats.page_reuse_count++; - return true; - } - - if (!xsk_umem_peek_addr(umem, &handle)) { - rx_ring->rx_stats.alloc_page_failed++; - return false; - } - - hr = umem->headroom + XDP_PACKET_HEADROOM; - - rx_buf->dma = xdp_umem_get_dma(umem, handle); - rx_buf->dma += hr; - - rx_buf->addr = xdp_umem_get_data(umem, handle); - rx_buf->addr += hr; - - rx_buf->handle = handle + umem->headroom; - - xsk_umem_release_addr(umem); - return true; -} - -/** - * ice_alloc_buf_slow_zc - Retrieve buffer address from XDP umem - * @rx_ring: ring with an xdp_umem bound to it - * @rx_buf: buffer to which xsk page address will be assigned + * This function allocates a number of Rx buffers from the fill ring + * or the internal recycle mechanism and places them on the Rx ring. * - * This function allocates an Rx buffer in the slow path. - * The buffer can come from fill queue or recycle queue. + * Note that ring wrap should be handled by caller of this function. * - * Returns true if an assignment was successful, false if not. + * Returns the amount of allocated Rx descriptors */ -static __always_inline bool -ice_alloc_buf_slow_zc(struct ice_ring *rx_ring, struct ice_rx_buf *rx_buf) +static u16 ice_fill_rx_descs(struct xsk_buff_pool *pool, struct xdp_buff **xdp, + union ice_32b_rx_flex_desc *rx_desc, u16 count) { - struct xdp_umem *umem = rx_ring->xsk_umem; - u64 handle, headroom; - - if (!xsk_umem_peek_addr_rq(umem, &handle)) { - rx_ring->rx_stats.alloc_page_failed++; - return false; - } - - handle &= umem->chunk_mask; - headroom = umem->headroom + XDP_PACKET_HEADROOM; - - rx_buf->dma = xdp_umem_get_dma(umem, handle); - rx_buf->dma += headroom; + dma_addr_t dma; + u16 buffs; + int i; - rx_buf->addr = xdp_umem_get_data(umem, handle); - rx_buf->addr += headroom; + buffs = xsk_buff_alloc_batch(pool, xdp, count); + for (i = 0; i < buffs; i++) { + dma = xsk_buff_xdp_get_dma(*xdp); + rx_desc->read.pkt_addr = cpu_to_le64(dma); + rx_desc->wb.status_error0 = 0; - rx_buf->handle = handle + umem->headroom; + rx_desc++; + xdp++; + } - xsk_umem_release_addr_rq(umem); - return true; + return buffs; } /** - * ice_alloc_rx_bufs_zc - allocate a number of Rx buffers + * __ice_alloc_rx_bufs_zc - allocate a number of Rx buffers * @rx_ring: Rx ring * @count: The number of buffers to allocate - * @alloc: the function pointer to call for allocation * - * This function allocates a number of Rx buffers from the fill ring - * or the internal recycle mechanism and places them on the Rx ring. + * Place the @count of descriptors onto Rx ring. Handle the ring wrap + * for case where space from next_to_use up to the end of ring is less + * than @count. Finally do a tail bump. * - * Returns false if all allocations were successful, true if any fail. + * Returns true if all allocations were successful, false if any fail. */ -static bool -ice_alloc_rx_bufs_zc(struct ice_ring *rx_ring, int count, - bool alloc(struct ice_ring *, struct ice_rx_buf *)) +static bool __ice_alloc_rx_bufs_zc(struct ice_rx_ring *rx_ring, u16 count) { + u32 nb_buffs_extra = 0, nb_buffs = 0; union ice_32b_rx_flex_desc *rx_desc; u16 ntu = rx_ring->next_to_use; - struct ice_rx_buf *rx_buf; - bool ret = false; - - if (!count) - return false; + u16 total_count = count; + struct xdp_buff **xdp; rx_desc = ICE_RX_DESC(rx_ring, ntu); - rx_buf = &rx_ring->rx_buf[ntu]; - - do { - if (!alloc(rx_ring, rx_buf)) { - ret = true; - break; + xdp = ice_xdp_buf(rx_ring, ntu); + + if (ntu + count >= rx_ring->count) { + nb_buffs_extra = ice_fill_rx_descs(rx_ring->xsk_pool, xdp, + rx_desc, + rx_ring->count - ntu); + if (nb_buffs_extra != rx_ring->count - ntu) { + ntu += nb_buffs_extra; + goto exit; } + rx_desc = ICE_RX_DESC(rx_ring, 0); + xdp = ice_xdp_buf(rx_ring, 0); + ntu = 0; + count -= nb_buffs_extra; + ice_release_rx_desc(rx_ring, 0); + } - dma_sync_single_range_for_device(rx_ring->dev, rx_buf->dma, 0, - rx_ring->rx_buf_len, - DMA_BIDIRECTIONAL); - - rx_desc->read.pkt_addr = cpu_to_le64(rx_buf->dma); - rx_desc->wb.status_error0 = 0; - - rx_desc++; - rx_buf++; - ntu++; + nb_buffs = ice_fill_rx_descs(rx_ring->xsk_pool, xdp, rx_desc, count); - if (unlikely(ntu == rx_ring->count)) { - rx_desc = ICE_RX_DESC(rx_ring, 0); - rx_buf = rx_ring->rx_buf; - ntu = 0; - } - } while (--count); + ntu += nb_buffs; + if (ntu == rx_ring->count) + ntu = 0; +exit: if (rx_ring->next_to_use != ntu) ice_release_rx_desc(rx_ring, ntu); - return ret; + return total_count == (nb_buffs_extra + nb_buffs); } /** - * ice_alloc_rx_bufs_fast_zc - allocate zero copy bufs in the hot path + * ice_alloc_rx_bufs_zc - allocate a number of Rx buffers * @rx_ring: Rx ring - * @count: number of bufs to allocate + * @count: The number of buffers to allocate * - * Returns false on success, true on failure. - */ -static bool ice_alloc_rx_bufs_fast_zc(struct ice_ring *rx_ring, u16 count) -{ - return ice_alloc_rx_bufs_zc(rx_ring, count, - ice_alloc_buf_fast_zc); -} - -/** - * ice_alloc_rx_bufs_slow_zc - allocate zero copy bufs in the slow path - * @rx_ring: Rx ring - * @count: number of bufs to allocate + * Wrapper for internal allocation routine; figure out how many tail + * bumps should take place based on the given threshold * - * Returns false on success, true on failure. + * Returns true if all calls to internal alloc routine succeeded */ -bool ice_alloc_rx_bufs_slow_zc(struct ice_ring *rx_ring, u16 count) +bool ice_alloc_rx_bufs_zc(struct ice_rx_ring *rx_ring, u16 count) { - return ice_alloc_rx_bufs_zc(rx_ring, count, - ice_alloc_buf_slow_zc); + u16 rx_thresh = ICE_RING_QUARTER(rx_ring); + u16 leftover, i, tail_bumps; + + tail_bumps = count / rx_thresh; + leftover = count - (tail_bumps * rx_thresh); + + for (i = 0; i < tail_bumps; i++) + if (!__ice_alloc_rx_bufs_zc(rx_ring, rx_thresh)) + return false; + return __ice_alloc_rx_bufs_zc(rx_ring, leftover); } /** * ice_bump_ntc - Bump the next_to_clean counter of an Rx ring * @rx_ring: Rx ring */ -static void ice_bump_ntc(struct ice_ring *rx_ring) +static void ice_bump_ntc(struct ice_rx_ring *rx_ring) { int ntc = rx_ring->next_to_clean + 1; @@ -692,90 +552,37 @@ static void ice_bump_ntc(struct ice_ring *rx_ring) } /** - * ice_get_rx_buf_zc - Fetch the current Rx buffer - * @rx_ring: Rx ring - * @size: size of a buffer - * - * This function returns the current, received Rx buffer and does - * DMA synchronization. - * - * Returns a pointer to the received Rx buffer. - */ -static struct ice_rx_buf *ice_get_rx_buf_zc(struct ice_ring *rx_ring, int size) -{ - struct ice_rx_buf *rx_buf; - - rx_buf = &rx_ring->rx_buf[rx_ring->next_to_clean]; - - dma_sync_single_range_for_cpu(rx_ring->dev, rx_buf->dma, 0, - size, DMA_BIDIRECTIONAL); - - return rx_buf; -} - -/** - * ice_reuse_rx_buf_zc - reuse an Rx buffer - * @rx_ring: Rx ring - * @old_buf: The buffer to recycle - * - * This function recycles a finished Rx buffer, and places it on the recycle - * queue (next_to_alloc). - */ -static void -ice_reuse_rx_buf_zc(struct ice_ring *rx_ring, struct ice_rx_buf *old_buf) -{ - 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 ice_rx_buf *new_buf; - - new_buf = &rx_ring->rx_buf[nta++]; - rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0; - - new_buf->dma = old_buf->dma & mask; - new_buf->dma += hr; - - new_buf->addr = (void *)((unsigned long)old_buf->addr & mask); - new_buf->addr += hr; - - new_buf->handle = old_buf->handle & mask; - new_buf->handle += rx_ring->xsk_umem->headroom; - - old_buf->addr = NULL; -} - -/** * ice_construct_skb_zc - Create an sk_buff from zero-copy buffer * @rx_ring: Rx ring - * @rx_buf: zero-copy Rx buffer - * @xdp: XDP buffer + * @xdp: Pointer to XDP buffer * * This function allocates a new skb from a zero-copy Rx buffer. * * Returns the skb on success, NULL on failure. */ static struct sk_buff * -ice_construct_skb_zc(struct ice_ring *rx_ring, struct ice_rx_buf *rx_buf, - struct xdp_buff *xdp) +ice_construct_skb_zc(struct ice_rx_ring *rx_ring, struct xdp_buff *xdp) { + unsigned int totalsize = xdp->data_end - xdp->data_meta; unsigned int metasize = xdp->data - xdp->data_meta; - unsigned int datasize = xdp->data_end - xdp->data; - unsigned int datasize_hard = xdp->data_end - - xdp->data_hard_start; struct sk_buff *skb; - skb = __napi_alloc_skb(&rx_ring->q_vector->napi, datasize_hard, + net_prefetch(xdp->data_meta); + + skb = __napi_alloc_skb(&rx_ring->q_vector->napi, totalsize, 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); + memcpy(__skb_put(skb, totalsize), xdp->data_meta, + ALIGN(totalsize, sizeof(long))); - ice_reuse_rx_buf_zc(rx_ring, rx_buf); + if (metasize) { + skb_metadata_set(skb, metasize); + __skb_pull(skb, metasize); + } + xsk_buff_free(xdp); return skb; } @@ -783,49 +590,52 @@ ice_construct_skb_zc(struct ice_ring *rx_ring, struct ice_rx_buf *rx_buf, * ice_run_xdp_zc - Executes an XDP program in zero-copy path * @rx_ring: Rx ring * @xdp: xdp_buff used as input to the XDP program + * @xdp_prog: XDP program to run + * @xdp_ring: ring to be used for XDP_TX action * * Returns any of ICE_XDP_{PASS, CONSUMED, TX, REDIR} */ static int -ice_run_xdp_zc(struct ice_ring *rx_ring, struct xdp_buff *xdp) +ice_run_xdp_zc(struct ice_rx_ring *rx_ring, struct xdp_buff *xdp, + struct bpf_prog *xdp_prog, struct ice_tx_ring *xdp_ring) { int err, result = ICE_XDP_PASS; - struct bpf_prog *xdp_prog; - struct ice_ring *xdp_ring; u32 act; - rcu_read_lock(); - xdp_prog = READ_ONCE(rx_ring->xdp_prog); - if (!xdp_prog) { - rcu_read_unlock(); - return ICE_XDP_PASS; + act = bpf_prog_run_xdp(xdp_prog, xdp); + + if (likely(act == XDP_REDIRECT)) { + err = xdp_do_redirect(rx_ring->netdev, xdp, xdp_prog); + if (!err) + return ICE_XDP_REDIR; + if (xsk_uses_need_wakeup(rx_ring->xsk_pool) && err == -ENOBUFS) + result = ICE_XDP_EXIT; + else + result = ICE_XDP_CONSUMED; + goto out_failure; } - 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: - xdp_ring = rx_ring->vsi->xdp_rings[rx_ring->q_index]; result = ice_xmit_xdp_buff(xdp, xdp_ring); + if (result == ICE_XDP_CONSUMED) + goto out_failure; break; - case XDP_REDIRECT: - err = xdp_do_redirect(rx_ring->netdev, xdp, xdp_prog); - result = !err ? ICE_XDP_REDIR : ICE_XDP_CONSUMED; + case XDP_DROP: + result = ICE_XDP_CONSUMED; break; default: - bpf_warn_invalid_xdp_action(act); - /* fallthrough -- not supported action */ + bpf_warn_invalid_xdp_action(rx_ring->netdev, xdp_prog, act); + fallthrough; case XDP_ABORTED: - trace_xdp_exception(rx_ring->netdev, xdp_prog, act); - /* fallthrough -- handle aborts by dropping frame */ - case XDP_DROP: result = ICE_XDP_CONSUMED; +out_failure: + trace_xdp_exception(rx_ring->netdev, xdp_prog, act); break; } - rcu_read_unlock(); return result; } @@ -836,35 +646,34 @@ ice_run_xdp_zc(struct ice_ring *rx_ring, struct xdp_buff *xdp) * * Returns number of processed packets on success, remaining budget on failure. */ -int ice_clean_rx_irq_zc(struct ice_ring *rx_ring, int budget) +int ice_clean_rx_irq_zc(struct ice_rx_ring *rx_ring, int budget) { unsigned int total_rx_bytes = 0, total_rx_packets = 0; - u16 cleaned_count = ICE_DESC_UNUSED(rx_ring); + struct ice_tx_ring *xdp_ring; unsigned int xdp_xmit = 0; - struct xdp_buff xdp; - bool failure = 0; + struct bpf_prog *xdp_prog; + bool failure = false; + int entries_to_alloc; - xdp.rxq = &rx_ring->xdp_rxq; + /* ZC patch is enabled only when XDP program is set, + * so here it can not be NULL + */ + xdp_prog = READ_ONCE(rx_ring->xdp_prog); + xdp_ring = rx_ring->xdp_ring; while (likely(total_rx_packets < (unsigned int)budget)) { union ice_32b_rx_flex_desc *rx_desc; unsigned int size, xdp_res = 0; - struct ice_rx_buf *rx_buf; + struct xdp_buff *xdp; struct sk_buff *skb; u16 stat_err_bits; u16 vlan_tag = 0; - u8 rx_ptype; - - if (cleaned_count >= ICE_RX_BUF_WRITE) { - failure |= ice_alloc_rx_bufs_fast_zc(rx_ring, - cleaned_count); - cleaned_count = 0; - } + u16 rx_ptype; rx_desc = ICE_RX_DESC(rx_ring, rx_ring->next_to_clean); stat_err_bits = BIT(ICE_RX_FLEX_DESC_STATUS0_DD_S); - if (!ice_test_staterr(rx_desc, stat_err_bits)) + if (!ice_test_staterr(rx_desc->wb.status_error0, stat_err_bits)) break; /* This memory barrier is needed to keep us from reading @@ -873,46 +682,50 @@ int ice_clean_rx_irq_zc(struct ice_ring *rx_ring, int budget) */ dma_rmb(); + if (unlikely(rx_ring->next_to_clean == rx_ring->next_to_use)) + break; + + xdp = *ice_xdp_buf(rx_ring, rx_ring->next_to_clean); + size = le16_to_cpu(rx_desc->wb.pkt_len) & ICE_RX_FLX_DESC_PKT_LEN_M; - if (!size) - break; + if (!size) { + xdp->data = NULL; + xdp->data_end = NULL; + xdp->data_hard_start = NULL; + xdp->data_meta = NULL; + goto construct_skb; + } - rx_buf = ice_get_rx_buf_zc(rx_ring, size); - if (!rx_buf->addr) - break; + xsk_buff_set_size(xdp, size); + xsk_buff_dma_sync_for_cpu(xdp, rx_ring->xsk_pool); - xdp.data = rx_buf->addr; - xdp.data_meta = xdp.data; - xdp.data_hard_start = xdp.data - XDP_PACKET_HEADROOM; - xdp.data_end = xdp.data + size; - xdp.handle = rx_buf->handle; - - xdp_res = ice_run_xdp_zc(rx_ring, &xdp); - if (xdp_res) { - if (xdp_res & (ICE_XDP_TX | ICE_XDP_REDIR)) { - xdp_xmit |= xdp_res; - rx_buf->addr = NULL; - } else { - ice_reuse_rx_buf_zc(rx_ring, rx_buf); - } - - total_rx_bytes += size; - total_rx_packets++; - cleaned_count++; - - ice_bump_ntc(rx_ring); - continue; + xdp_res = ice_run_xdp_zc(rx_ring, xdp, xdp_prog, xdp_ring); + if (likely(xdp_res & (ICE_XDP_TX | ICE_XDP_REDIR))) { + xdp_xmit |= xdp_res; + } else if (xdp_res == ICE_XDP_EXIT) { + failure = true; + break; + } else if (xdp_res == ICE_XDP_CONSUMED) { + xsk_buff_free(xdp); + } else if (xdp_res == ICE_XDP_PASS) { + goto construct_skb; } + total_rx_bytes += size; + total_rx_packets++; + + ice_bump_ntc(rx_ring); + continue; + +construct_skb: /* XDP_PASS path */ - skb = ice_construct_skb_zc(rx_ring, rx_buf, &xdp); + skb = ice_construct_skb_zc(rx_ring, xdp); if (!skb) { rx_ring->rx_stats.alloc_buf_failed++; break; } - cleaned_count++; ice_bump_ntc(rx_ring); if (eth_skb_pad(skb)) { @@ -923,9 +736,7 @@ int ice_clean_rx_irq_zc(struct ice_ring *rx_ring, int budget) total_rx_bytes += skb->len; total_rx_packets++; - stat_err_bits = BIT(ICE_RX_FLEX_DESC_STATUS0_L2TAG1P_S); - if (ice_test_staterr(rx_desc, stat_err_bits)) - vlan_tag = le16_to_cpu(rx_desc->wb.l2tag1); + vlan_tag = ice_get_vlan_tag_from_rx_desc(rx_desc); rx_ptype = le16_to_cpu(rx_desc->wb.ptype_flex_flags0) & ICE_RX_FLEX_DESC_PTYPE_M; @@ -934,63 +745,23 @@ int ice_clean_rx_irq_zc(struct ice_ring *rx_ring, int budget) ice_receive_skb(rx_ring, skb, vlan_tag); } - ice_finalize_xdp_rx(rx_ring, xdp_xmit); - ice_update_rx_ring_stats(rx_ring, total_rx_packets, total_rx_bytes); - - return failure ? budget : (int)total_rx_packets; -} - -/** - * ice_xmit_zc - Completes AF_XDP entries, and cleans XDP entries - * @xdp_ring: XDP Tx ring - * @budget: max number of frames to xmit - * - * Returns true if cleanup/transmission is done. - */ -static bool ice_xmit_zc(struct ice_ring *xdp_ring, int budget) -{ - struct ice_tx_desc *tx_desc = NULL; - bool work_done = true; - struct xdp_desc desc; - dma_addr_t dma; - - while (likely(budget-- > 0)) { - struct ice_tx_buf *tx_buf; - - if (unlikely(!ICE_DESC_UNUSED(xdp_ring))) { - xdp_ring->tx_stats.tx_busy++; - work_done = false; - break; - } - - tx_buf = &xdp_ring->tx_buf[xdp_ring->next_to_use]; - - if (!xsk_umem_consume_tx(xdp_ring->xsk_umem, &desc)) - break; - - dma = xdp_umem_get_dma(xdp_ring->xsk_umem, desc.addr); - - dma_sync_single_for_device(xdp_ring->dev, dma, desc.len, - DMA_BIDIRECTIONAL); - - tx_buf->bytecount = desc.len; + entries_to_alloc = ICE_DESC_UNUSED(rx_ring); + if (entries_to_alloc > ICE_RING_QUARTER(rx_ring)) + failure |= !ice_alloc_rx_bufs_zc(rx_ring, entries_to_alloc); - tx_desc = ICE_TX_DESC(xdp_ring, xdp_ring->next_to_use); - tx_desc->buf_addr = cpu_to_le64(dma); - tx_desc->cmd_type_offset_bsz = build_ctob(ICE_TXD_LAST_DESC_CMD, - 0, desc.len, 0); + ice_finalize_xdp_rx(xdp_ring, xdp_xmit); + ice_update_rx_ring_stats(rx_ring, total_rx_packets, total_rx_bytes); - xdp_ring->next_to_use++; - if (xdp_ring->next_to_use == xdp_ring->count) - xdp_ring->next_to_use = 0; - } + if (xsk_uses_need_wakeup(rx_ring->xsk_pool)) { + if (failure || rx_ring->next_to_clean == rx_ring->next_to_use) + xsk_set_rx_need_wakeup(rx_ring->xsk_pool); + else + xsk_clear_rx_need_wakeup(rx_ring->xsk_pool); - if (tx_desc) { - ice_xdp_ring_update_tail(xdp_ring); - xsk_umem_consume_tx_done(xdp_ring->xsk_umem); + return (int)total_rx_packets; } - return budget > 0 && work_done; + return failure ? budget : (int)total_rx_packets; } /** @@ -999,41 +770,48 @@ static bool ice_xmit_zc(struct ice_ring *xdp_ring, int budget) * @tx_buf: Tx buffer to clean */ static void -ice_clean_xdp_tx_buf(struct ice_ring *xdp_ring, struct ice_tx_buf *tx_buf) +ice_clean_xdp_tx_buf(struct ice_tx_ring *xdp_ring, struct ice_tx_buf *tx_buf) { xdp_return_frame((struct xdp_frame *)tx_buf->raw_buf); + xdp_ring->xdp_tx_active--; dma_unmap_single(xdp_ring->dev, dma_unmap_addr(tx_buf, dma), dma_unmap_len(tx_buf, len), DMA_TO_DEVICE); dma_unmap_len_set(tx_buf, len, 0); } /** - * ice_clean_tx_irq_zc - Completes AF_XDP entries, and cleans XDP entries + * ice_clean_xdp_irq_zc - produce AF_XDP descriptors to CQ * @xdp_ring: XDP Tx ring - * @budget: NAPI budget - * - * Returns true if cleanup/tranmission is done. */ -bool ice_clean_tx_irq_zc(struct ice_ring *xdp_ring, int budget) +static void ice_clean_xdp_irq_zc(struct ice_tx_ring *xdp_ring) { - int total_packets = 0, total_bytes = 0; - s16 ntc = xdp_ring->next_to_clean; + u16 ntc = xdp_ring->next_to_clean; struct ice_tx_desc *tx_desc; + u16 cnt = xdp_ring->count; struct ice_tx_buf *tx_buf; - u32 xsk_frames = 0; - bool xmit_done; + u16 xsk_frames = 0; + u16 last_rs; + int i; - tx_desc = ICE_TX_DESC(xdp_ring, ntc); - tx_buf = &xdp_ring->tx_buf[ntc]; - ntc -= xdp_ring->count; + last_rs = xdp_ring->next_to_use ? xdp_ring->next_to_use - 1 : cnt - 1; + tx_desc = ICE_TX_DESC(xdp_ring, last_rs); + if ((tx_desc->cmd_type_offset_bsz & + cpu_to_le64(ICE_TX_DESC_DTYPE_DESC_DONE))) { + if (last_rs >= ntc) + xsk_frames = last_rs - ntc + 1; + else + xsk_frames = last_rs + cnt - ntc + 1; + } - do { - if (!(tx_desc->cmd_type_offset_bsz & - cpu_to_le64(ICE_TX_DESC_DTYPE_DESC_DONE))) - break; + if (!xsk_frames) + return; - total_bytes += tx_buf->bytecount; - total_packets++; + if (likely(!xdp_ring->xdp_tx_active)) + goto skip; + + ntc = xdp_ring->next_to_clean; + for (i = 0; i < xsk_frames; i++) { + tx_buf = &xdp_ring->tx_buf[ntc]; if (tx_buf->raw_buf) { ice_clean_xdp_tx_buf(xdp_ring, tx_buf); @@ -1042,31 +820,145 @@ bool ice_clean_tx_irq_zc(struct ice_ring *xdp_ring, int budget) xsk_frames++; } - tx_desc->cmd_type_offset_bsz = 0; - tx_buf++; - tx_desc++; ntc++; + if (ntc >= xdp_ring->count) + ntc = 0; + } +skip: + tx_desc->cmd_type_offset_bsz = 0; + xdp_ring->next_to_clean += xsk_frames; + if (xdp_ring->next_to_clean >= cnt) + xdp_ring->next_to_clean -= cnt; + if (xsk_frames) + xsk_tx_completed(xdp_ring->xsk_pool, xsk_frames); +} - if (unlikely(!ntc)) { - ntc -= xdp_ring->count; - tx_buf = xdp_ring->tx_buf; - tx_desc = ICE_TX_DESC(xdp_ring, 0); - } +/** + * ice_xmit_pkt - produce a single HW Tx descriptor out of AF_XDP descriptor + * @xdp_ring: XDP ring to produce the HW Tx descriptor on + * @desc: AF_XDP descriptor to pull the DMA address and length from + * @total_bytes: bytes accumulator that will be used for stats update + */ +static void ice_xmit_pkt(struct ice_tx_ring *xdp_ring, struct xdp_desc *desc, + unsigned int *total_bytes) +{ + struct ice_tx_desc *tx_desc; + dma_addr_t dma; - prefetch(tx_desc); + dma = xsk_buff_raw_get_dma(xdp_ring->xsk_pool, desc->addr); + xsk_buff_raw_dma_sync_for_device(xdp_ring->xsk_pool, dma, desc->len); - } while (likely(--budget)); + tx_desc = ICE_TX_DESC(xdp_ring, xdp_ring->next_to_use++); + tx_desc->buf_addr = cpu_to_le64(dma); + tx_desc->cmd_type_offset_bsz = ice_build_ctob(ICE_TX_DESC_CMD_EOP, + 0, desc->len, 0); - ntc += xdp_ring->count; - xdp_ring->next_to_clean = ntc; + *total_bytes += desc->len; +} - if (xsk_frames) - xsk_umem_complete_tx(xdp_ring->xsk_umem, xsk_frames); +/** + * ice_xmit_pkt_batch - produce a batch of HW Tx descriptors out of AF_XDP descriptors + * @xdp_ring: XDP ring to produce the HW Tx descriptors on + * @descs: AF_XDP descriptors to pull the DMA addresses and lengths from + * @total_bytes: bytes accumulator that will be used for stats update + */ +static void ice_xmit_pkt_batch(struct ice_tx_ring *xdp_ring, struct xdp_desc *descs, + unsigned int *total_bytes) +{ + u16 ntu = xdp_ring->next_to_use; + struct ice_tx_desc *tx_desc; + u32 i; + + loop_unrolled_for(i = 0; i < PKTS_PER_BATCH; i++) { + dma_addr_t dma; + + dma = xsk_buff_raw_get_dma(xdp_ring->xsk_pool, descs[i].addr); + xsk_buff_raw_dma_sync_for_device(xdp_ring->xsk_pool, dma, descs[i].len); + + tx_desc = ICE_TX_DESC(xdp_ring, ntu++); + tx_desc->buf_addr = cpu_to_le64(dma); + tx_desc->cmd_type_offset_bsz = ice_build_ctob(ICE_TX_DESC_CMD_EOP, + 0, descs[i].len, 0); + + *total_bytes += descs[i].len; + } - ice_update_tx_ring_stats(xdp_ring, total_packets, total_bytes); - xmit_done = ice_xmit_zc(xdp_ring, ICE_DFLT_IRQ_WORK); + xdp_ring->next_to_use = ntu; +} - return budget > 0 && xmit_done; +/** + * ice_fill_tx_hw_ring - produce the number of Tx descriptors onto ring + * @xdp_ring: XDP ring to produce the HW Tx descriptors on + * @descs: AF_XDP descriptors to pull the DMA addresses and lengths from + * @nb_pkts: count of packets to be send + * @total_bytes: bytes accumulator that will be used for stats update + */ +static void ice_fill_tx_hw_ring(struct ice_tx_ring *xdp_ring, struct xdp_desc *descs, + u32 nb_pkts, unsigned int *total_bytes) +{ + u32 batched, leftover, i; + + batched = ALIGN_DOWN(nb_pkts, PKTS_PER_BATCH); + leftover = nb_pkts & (PKTS_PER_BATCH - 1); + for (i = 0; i < batched; i += PKTS_PER_BATCH) + ice_xmit_pkt_batch(xdp_ring, &descs[i], total_bytes); + for (; i < batched + leftover; i++) + ice_xmit_pkt(xdp_ring, &descs[i], total_bytes); +} + +/** + * ice_set_rs_bit - set RS bit on last produced descriptor (one behind current NTU) + * @xdp_ring: XDP ring to produce the HW Tx descriptors on + */ +static void ice_set_rs_bit(struct ice_tx_ring *xdp_ring) +{ + u16 ntu = xdp_ring->next_to_use ? xdp_ring->next_to_use - 1 : xdp_ring->count - 1; + struct ice_tx_desc *tx_desc; + + tx_desc = ICE_TX_DESC(xdp_ring, ntu); + tx_desc->cmd_type_offset_bsz |= + cpu_to_le64(ICE_TX_DESC_CMD_RS << ICE_TXD_QW1_CMD_S); +} + +/** + * ice_xmit_zc - take entries from XSK Tx ring and place them onto HW Tx ring + * @xdp_ring: XDP ring to produce the HW Tx descriptors on + * + * Returns true if there is no more work that needs to be done, false otherwise + */ +bool ice_xmit_zc(struct ice_tx_ring *xdp_ring) +{ + struct xdp_desc *descs = xdp_ring->xsk_pool->tx_descs; + u32 nb_pkts, nb_processed = 0; + unsigned int total_bytes = 0; + int budget; + + ice_clean_xdp_irq_zc(xdp_ring); + + budget = ICE_DESC_UNUSED(xdp_ring); + budget = min_t(u16, budget, ICE_RING_QUARTER(xdp_ring)); + + nb_pkts = xsk_tx_peek_release_desc_batch(xdp_ring->xsk_pool, budget); + if (!nb_pkts) + return true; + + if (xdp_ring->next_to_use + nb_pkts >= xdp_ring->count) { + nb_processed = xdp_ring->count - xdp_ring->next_to_use; + ice_fill_tx_hw_ring(xdp_ring, descs, nb_processed, &total_bytes); + xdp_ring->next_to_use = 0; + } + + ice_fill_tx_hw_ring(xdp_ring, &descs[nb_processed], nb_pkts - nb_processed, + &total_bytes); + + ice_set_rs_bit(xdp_ring); + ice_xdp_ring_update_tail(xdp_ring); + ice_update_tx_ring_stats(xdp_ring, nb_pkts, total_bytes); + + if (xsk_uses_need_wakeup(xdp_ring->xsk_pool)) + xsk_set_tx_need_wakeup(xdp_ring->xsk_pool); + + return nb_pkts < budget; } /** @@ -1084,21 +976,21 @@ ice_xsk_wakeup(struct net_device *netdev, u32 queue_id, struct ice_netdev_priv *np = netdev_priv(netdev); struct ice_q_vector *q_vector; struct ice_vsi *vsi = np->vsi; - struct ice_ring *ring; + struct ice_tx_ring *ring; - if (test_bit(__ICE_DOWN, vsi->state)) + if (test_bit(ICE_VSI_DOWN, vsi->state)) return -ENETDOWN; if (!ice_is_xdp_ena_vsi(vsi)) - return -ENXIO; + return -EINVAL; - if (queue_id >= vsi->num_txq) - return -ENXIO; + if (queue_id >= vsi->num_txq || queue_id >= vsi->num_rxq) + return -EINVAL; - if (!vsi->xdp_rings[queue_id]->xsk_umem) - return -ENXIO; + ring = vsi->rx_rings[queue_id]->xdp_ring; - ring = vsi->xdp_rings[queue_id]; + if (!ring->xsk_pool) + return -EINVAL; /* The idea here is that if NAPI is running, mark a miss, so * it will run again. If not, trigger an interrupt and @@ -1114,20 +1006,17 @@ ice_xsk_wakeup(struct net_device *netdev, u32 queue_id, } /** - * ice_xsk_any_rx_ring_ena - Checks if Rx rings have AF_XDP UMEM attached + * ice_xsk_any_rx_ring_ena - Checks if Rx rings have AF_XDP buff pool attached * @vsi: VSI to be checked * - * Returns true if any of the Rx rings has an AF_XDP UMEM attached + * Returns true if any of the Rx rings has an AF_XDP buff pool attached */ bool ice_xsk_any_rx_ring_ena(struct ice_vsi *vsi) { int i; - if (!vsi->xsk_umems) - return false; - - for (i = 0; i < vsi->num_xsk_umems; i++) { - if (vsi->xsk_umems[i]) + ice_for_each_rxq(vsi, i) { + if (xsk_get_pool_from_qid(vsi->netdev, i)) return true; } @@ -1135,29 +1024,29 @@ bool ice_xsk_any_rx_ring_ena(struct ice_vsi *vsi) } /** - * ice_xsk_clean_rx_ring - clean UMEM queues connected to a given Rx ring + * ice_xsk_clean_rx_ring - clean buffer pool queues connected to a given Rx ring * @rx_ring: ring to be cleaned */ -void ice_xsk_clean_rx_ring(struct ice_ring *rx_ring) +void ice_xsk_clean_rx_ring(struct ice_rx_ring *rx_ring) { - u16 i; - - for (i = 0; i < rx_ring->count; i++) { - struct ice_rx_buf *rx_buf = &rx_ring->rx_buf[i]; + u16 ntc = rx_ring->next_to_clean; + u16 ntu = rx_ring->next_to_use; - if (!rx_buf->addr) - continue; + while (ntc != ntu) { + struct xdp_buff *xdp = *ice_xdp_buf(rx_ring, ntc); - xsk_umem_fq_reuse(rx_ring->xsk_umem, rx_buf->handle); - rx_buf->addr = NULL; + xsk_buff_free(xdp); + ntc++; + if (ntc >= rx_ring->count) + ntc = 0; } } /** - * ice_xsk_clean_xdp_ring - Clean the XDP Tx ring and its UMEM queues + * ice_xsk_clean_xdp_ring - Clean the XDP Tx ring and its buffer pool queues * @xdp_ring: XDP_Tx ring */ -void ice_xsk_clean_xdp_ring(struct ice_ring *xdp_ring) +void ice_xsk_clean_xdp_ring(struct ice_tx_ring *xdp_ring) { u16 ntc = xdp_ring->next_to_clean, ntu = xdp_ring->next_to_use; u32 xsk_frames = 0; @@ -1178,5 +1067,5 @@ void ice_xsk_clean_xdp_ring(struct ice_ring *xdp_ring) } if (xsk_frames) - xsk_umem_complete_tx(xdp_ring->xsk_umem, xsk_frames); + xsk_tx_completed(xdp_ring->xsk_pool, xsk_frames); } |