981 lines
24 KiB
C
981 lines
24 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/* Atlantic Network Driver
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*
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* Copyright (C) 2014-2019 aQuantia Corporation
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* Copyright (C) 2019-2020 Marvell International Ltd.
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*/
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/* File aq_ring.c: Definition of functions for Rx/Tx rings. */
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#include "aq_nic.h"
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#include "aq_hw.h"
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#include "aq_hw_utils.h"
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#include "aq_ptp.h"
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#include "aq_vec.h"
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#include "aq_main.h"
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#include <net/xdp.h>
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#include <linux/filter.h>
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#include <linux/bpf_trace.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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static void aq_get_rxpages_xdp(struct aq_ring_buff_s *buff,
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struct xdp_buff *xdp)
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{
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struct skb_shared_info *sinfo;
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int i;
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if (xdp_buff_has_frags(xdp)) {
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sinfo = xdp_get_shared_info_from_buff(xdp);
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for (i = 0; i < sinfo->nr_frags; i++) {
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skb_frag_t *frag = &sinfo->frags[i];
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page_ref_inc(skb_frag_page(frag));
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}
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}
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page_ref_inc(buff->rxdata.page);
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}
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static inline void aq_free_rxpage(struct aq_rxpage *rxpage, struct device *dev)
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{
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unsigned int len = PAGE_SIZE << rxpage->order;
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dma_unmap_page(dev, rxpage->daddr, len, DMA_FROM_DEVICE);
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/* Drop the ref for being in the ring. */
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__free_pages(rxpage->page, rxpage->order);
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rxpage->page = NULL;
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}
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static int aq_alloc_rxpages(struct aq_rxpage *rxpage, struct aq_ring_s *rx_ring)
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{
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struct device *dev = aq_nic_get_dev(rx_ring->aq_nic);
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unsigned int order = rx_ring->page_order;
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struct page *page;
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int ret = -ENOMEM;
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dma_addr_t daddr;
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page = dev_alloc_pages(order);
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if (unlikely(!page))
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goto err_exit;
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daddr = dma_map_page(dev, page, 0, PAGE_SIZE << order,
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DMA_FROM_DEVICE);
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if (unlikely(dma_mapping_error(dev, daddr)))
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goto free_page;
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rxpage->page = page;
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rxpage->daddr = daddr;
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rxpage->order = order;
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rxpage->pg_off = rx_ring->page_offset;
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return 0;
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free_page:
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__free_pages(page, order);
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err_exit:
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return ret;
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}
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static int aq_get_rxpages(struct aq_ring_s *self, struct aq_ring_buff_s *rxbuf)
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{
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unsigned int order = self->page_order;
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u16 page_offset = self->page_offset;
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u16 frame_max = self->frame_max;
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u16 tail_size = self->tail_size;
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int ret;
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if (rxbuf->rxdata.page) {
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/* One means ring is the only user and can reuse */
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if (page_ref_count(rxbuf->rxdata.page) > 1) {
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/* Try reuse buffer */
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rxbuf->rxdata.pg_off += frame_max + page_offset +
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tail_size;
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if (rxbuf->rxdata.pg_off + frame_max + tail_size <=
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(PAGE_SIZE << order)) {
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u64_stats_update_begin(&self->stats.rx.syncp);
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self->stats.rx.pg_flips++;
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u64_stats_update_end(&self->stats.rx.syncp);
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} else {
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/* Buffer exhausted. We have other users and
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* should release this page and realloc
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*/
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aq_free_rxpage(&rxbuf->rxdata,
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aq_nic_get_dev(self->aq_nic));
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u64_stats_update_begin(&self->stats.rx.syncp);
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self->stats.rx.pg_losts++;
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u64_stats_update_end(&self->stats.rx.syncp);
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}
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} else {
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rxbuf->rxdata.pg_off = page_offset;
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u64_stats_update_begin(&self->stats.rx.syncp);
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self->stats.rx.pg_reuses++;
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u64_stats_update_end(&self->stats.rx.syncp);
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}
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}
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if (!rxbuf->rxdata.page) {
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ret = aq_alloc_rxpages(&rxbuf->rxdata, self);
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if (ret) {
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u64_stats_update_begin(&self->stats.rx.syncp);
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self->stats.rx.alloc_fails++;
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u64_stats_update_end(&self->stats.rx.syncp);
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}
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return ret;
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}
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return 0;
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}
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static struct aq_ring_s *aq_ring_alloc(struct aq_ring_s *self,
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struct aq_nic_s *aq_nic)
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{
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int err = 0;
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self->buff_ring =
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kcalloc(self->size, sizeof(struct aq_ring_buff_s), GFP_KERNEL);
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if (!self->buff_ring) {
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err = -ENOMEM;
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goto err_exit;
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}
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self->dx_ring = dma_alloc_coherent(aq_nic_get_dev(aq_nic),
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self->size * self->dx_size,
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&self->dx_ring_pa, GFP_KERNEL);
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if (!self->dx_ring) {
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err = -ENOMEM;
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goto err_exit;
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}
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err_exit:
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if (err < 0) {
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aq_ring_free(self);
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self = NULL;
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}
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return self;
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}
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struct aq_ring_s *aq_ring_tx_alloc(struct aq_ring_s *self,
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struct aq_nic_s *aq_nic,
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unsigned int idx,
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struct aq_nic_cfg_s *aq_nic_cfg)
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{
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int err = 0;
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self->aq_nic = aq_nic;
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self->idx = idx;
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self->size = aq_nic_cfg->txds;
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self->dx_size = aq_nic_cfg->aq_hw_caps->txd_size;
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self = aq_ring_alloc(self, aq_nic);
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if (!self) {
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err = -ENOMEM;
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goto err_exit;
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}
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err_exit:
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if (err < 0) {
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aq_ring_free(self);
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self = NULL;
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}
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return self;
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}
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struct aq_ring_s *aq_ring_rx_alloc(struct aq_ring_s *self,
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struct aq_nic_s *aq_nic,
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unsigned int idx,
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struct aq_nic_cfg_s *aq_nic_cfg)
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{
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int err = 0;
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self->aq_nic = aq_nic;
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self->idx = idx;
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self->size = aq_nic_cfg->rxds;
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self->dx_size = aq_nic_cfg->aq_hw_caps->rxd_size;
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self->xdp_prog = aq_nic->xdp_prog;
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self->frame_max = AQ_CFG_RX_FRAME_MAX;
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/* Only order-2 is allowed if XDP is enabled */
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if (READ_ONCE(self->xdp_prog)) {
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self->page_offset = AQ_XDP_HEADROOM;
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self->page_order = AQ_CFG_XDP_PAGEORDER;
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self->tail_size = AQ_XDP_TAILROOM;
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} else {
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self->page_offset = 0;
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self->page_order = fls(self->frame_max / PAGE_SIZE +
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(self->frame_max % PAGE_SIZE ? 1 : 0)) - 1;
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if (aq_nic_cfg->rxpageorder > self->page_order)
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self->page_order = aq_nic_cfg->rxpageorder;
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self->tail_size = 0;
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}
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self = aq_ring_alloc(self, aq_nic);
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if (!self) {
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err = -ENOMEM;
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goto err_exit;
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}
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err_exit:
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if (err < 0) {
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aq_ring_free(self);
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self = NULL;
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}
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return self;
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}
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struct aq_ring_s *
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aq_ring_hwts_rx_alloc(struct aq_ring_s *self, struct aq_nic_s *aq_nic,
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unsigned int idx, unsigned int size, unsigned int dx_size)
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{
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struct device *dev = aq_nic_get_dev(aq_nic);
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size_t sz = size * dx_size + AQ_CFG_RXDS_DEF;
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memset(self, 0, sizeof(*self));
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self->aq_nic = aq_nic;
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self->idx = idx;
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self->size = size;
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self->dx_size = dx_size;
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self->dx_ring = dma_alloc_coherent(dev, sz, &self->dx_ring_pa,
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GFP_KERNEL);
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if (!self->dx_ring) {
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aq_ring_free(self);
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return NULL;
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}
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return self;
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}
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int aq_ring_init(struct aq_ring_s *self, const enum atl_ring_type ring_type)
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{
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self->hw_head = 0;
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self->sw_head = 0;
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self->sw_tail = 0;
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self->ring_type = ring_type;
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if (self->ring_type == ATL_RING_RX)
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u64_stats_init(&self->stats.rx.syncp);
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else
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u64_stats_init(&self->stats.tx.syncp);
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return 0;
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}
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static inline bool aq_ring_dx_in_range(unsigned int h, unsigned int i,
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unsigned int t)
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{
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return (h < t) ? ((h < i) && (i < t)) : ((h < i) || (i < t));
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}
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void aq_ring_update_queue_state(struct aq_ring_s *ring)
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{
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if (aq_ring_avail_dx(ring) <= AQ_CFG_SKB_FRAGS_MAX)
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aq_ring_queue_stop(ring);
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else if (aq_ring_avail_dx(ring) > AQ_CFG_RESTART_DESC_THRES)
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aq_ring_queue_wake(ring);
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}
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void aq_ring_queue_wake(struct aq_ring_s *ring)
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{
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struct net_device *ndev = aq_nic_get_ndev(ring->aq_nic);
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if (__netif_subqueue_stopped(ndev,
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AQ_NIC_RING2QMAP(ring->aq_nic,
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ring->idx))) {
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netif_wake_subqueue(ndev,
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AQ_NIC_RING2QMAP(ring->aq_nic, ring->idx));
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u64_stats_update_begin(&ring->stats.tx.syncp);
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ring->stats.tx.queue_restarts++;
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u64_stats_update_end(&ring->stats.tx.syncp);
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}
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}
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void aq_ring_queue_stop(struct aq_ring_s *ring)
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{
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struct net_device *ndev = aq_nic_get_ndev(ring->aq_nic);
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if (!__netif_subqueue_stopped(ndev,
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AQ_NIC_RING2QMAP(ring->aq_nic,
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ring->idx)))
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netif_stop_subqueue(ndev,
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AQ_NIC_RING2QMAP(ring->aq_nic, ring->idx));
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}
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bool aq_ring_tx_clean(struct aq_ring_s *self)
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{
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struct device *dev = aq_nic_get_dev(self->aq_nic);
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unsigned int budget;
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for (budget = AQ_CFG_TX_CLEAN_BUDGET;
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budget && self->sw_head != self->hw_head; budget--) {
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struct aq_ring_buff_s *buff = &self->buff_ring[self->sw_head];
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if (likely(buff->is_mapped)) {
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if (unlikely(buff->is_sop)) {
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if (!buff->is_eop &&
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buff->eop_index != 0xffffU &&
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(!aq_ring_dx_in_range(self->sw_head,
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buff->eop_index,
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self->hw_head)))
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break;
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dma_unmap_single(dev, buff->pa, buff->len,
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DMA_TO_DEVICE);
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} else {
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dma_unmap_page(dev, buff->pa, buff->len,
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DMA_TO_DEVICE);
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}
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}
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if (likely(!buff->is_eop))
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goto out;
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if (buff->skb) {
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u64_stats_update_begin(&self->stats.tx.syncp);
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++self->stats.tx.packets;
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self->stats.tx.bytes += buff->skb->len;
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u64_stats_update_end(&self->stats.tx.syncp);
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dev_kfree_skb_any(buff->skb);
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} else if (buff->xdpf) {
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u64_stats_update_begin(&self->stats.tx.syncp);
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++self->stats.tx.packets;
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self->stats.tx.bytes += xdp_get_frame_len(buff->xdpf);
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u64_stats_update_end(&self->stats.tx.syncp);
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xdp_return_frame_rx_napi(buff->xdpf);
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}
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out:
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buff->skb = NULL;
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buff->xdpf = NULL;
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buff->pa = 0U;
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buff->eop_index = 0xffffU;
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self->sw_head = aq_ring_next_dx(self, self->sw_head);
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}
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return !!budget;
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}
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static void aq_rx_checksum(struct aq_ring_s *self,
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struct aq_ring_buff_s *buff,
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struct sk_buff *skb)
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{
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if (!(self->aq_nic->ndev->features & NETIF_F_RXCSUM))
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return;
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if (unlikely(buff->is_cso_err)) {
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u64_stats_update_begin(&self->stats.rx.syncp);
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++self->stats.rx.errors;
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u64_stats_update_end(&self->stats.rx.syncp);
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skb->ip_summed = CHECKSUM_NONE;
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return;
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}
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if (buff->is_ip_cso) {
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__skb_incr_checksum_unnecessary(skb);
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} else {
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skb->ip_summed = CHECKSUM_NONE;
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}
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if (buff->is_udp_cso || buff->is_tcp_cso)
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__skb_incr_checksum_unnecessary(skb);
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}
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int aq_xdp_xmit(struct net_device *dev, int num_frames,
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struct xdp_frame **frames, u32 flags)
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{
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struct aq_nic_s *aq_nic = netdev_priv(dev);
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unsigned int vec, i, drop = 0;
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int cpu = smp_processor_id();
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struct aq_nic_cfg_s *aq_cfg;
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struct aq_ring_s *ring;
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aq_cfg = aq_nic_get_cfg(aq_nic);
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vec = cpu % aq_cfg->vecs;
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ring = aq_nic->aq_ring_tx[AQ_NIC_CFG_TCVEC2RING(aq_cfg, 0, vec)];
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for (i = 0; i < num_frames; i++) {
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struct xdp_frame *xdpf = frames[i];
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if (aq_nic_xmit_xdpf(aq_nic, ring, xdpf) == NETDEV_TX_BUSY)
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drop++;
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}
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return num_frames - drop;
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}
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static struct sk_buff *aq_xdp_build_skb(struct xdp_buff *xdp,
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struct net_device *dev,
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struct aq_ring_buff_s *buff)
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{
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struct xdp_frame *xdpf;
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struct sk_buff *skb;
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xdpf = xdp_convert_buff_to_frame(xdp);
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if (unlikely(!xdpf))
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return NULL;
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skb = xdp_build_skb_from_frame(xdpf, dev);
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if (!skb)
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return NULL;
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aq_get_rxpages_xdp(buff, xdp);
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return skb;
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}
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static struct sk_buff *aq_xdp_run_prog(struct aq_nic_s *aq_nic,
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struct xdp_buff *xdp,
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struct aq_ring_s *rx_ring,
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struct aq_ring_buff_s *buff)
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{
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int result = NETDEV_TX_BUSY;
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struct aq_ring_s *tx_ring;
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struct xdp_frame *xdpf;
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struct bpf_prog *prog;
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u32 act = XDP_ABORTED;
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struct sk_buff *skb;
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|
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u64_stats_update_begin(&rx_ring->stats.rx.syncp);
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++rx_ring->stats.rx.packets;
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rx_ring->stats.rx.bytes += xdp_get_buff_len(xdp);
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u64_stats_update_end(&rx_ring->stats.rx.syncp);
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prog = READ_ONCE(rx_ring->xdp_prog);
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if (!prog)
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return aq_xdp_build_skb(xdp, aq_nic->ndev, buff);
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|
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prefetchw(xdp->data_hard_start); /* xdp_frame write */
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|
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/* single buffer XDP program, but packet is multi buffer, aborted */
|
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if (xdp_buff_has_frags(xdp) && !prog->aux->xdp_has_frags)
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goto out_aborted;
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|
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act = bpf_prog_run_xdp(prog, xdp);
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switch (act) {
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case XDP_PASS:
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skb = aq_xdp_build_skb(xdp, aq_nic->ndev, buff);
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if (!skb)
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goto out_aborted;
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u64_stats_update_begin(&rx_ring->stats.rx.syncp);
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++rx_ring->stats.rx.xdp_pass;
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u64_stats_update_end(&rx_ring->stats.rx.syncp);
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return skb;
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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_aborted;
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tx_ring = aq_nic->aq_ring_tx[rx_ring->idx];
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result = aq_nic_xmit_xdpf(aq_nic, tx_ring, xdpf);
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if (result == NETDEV_TX_BUSY)
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goto out_aborted;
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u64_stats_update_begin(&rx_ring->stats.rx.syncp);
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++rx_ring->stats.rx.xdp_tx;
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u64_stats_update_end(&rx_ring->stats.rx.syncp);
|
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aq_get_rxpages_xdp(buff, xdp);
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break;
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case XDP_REDIRECT:
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if (xdp_do_redirect(aq_nic->ndev, xdp, prog) < 0)
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goto out_aborted;
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xdp_do_flush();
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u64_stats_update_begin(&rx_ring->stats.rx.syncp);
|
|
++rx_ring->stats.rx.xdp_redirect;
|
|
u64_stats_update_end(&rx_ring->stats.rx.syncp);
|
|
aq_get_rxpages_xdp(buff, xdp);
|
|
break;
|
|
default:
|
|
fallthrough;
|
|
case XDP_ABORTED:
|
|
out_aborted:
|
|
u64_stats_update_begin(&rx_ring->stats.rx.syncp);
|
|
++rx_ring->stats.rx.xdp_aborted;
|
|
u64_stats_update_end(&rx_ring->stats.rx.syncp);
|
|
trace_xdp_exception(aq_nic->ndev, prog, act);
|
|
bpf_warn_invalid_xdp_action(aq_nic->ndev, prog, act);
|
|
break;
|
|
case XDP_DROP:
|
|
u64_stats_update_begin(&rx_ring->stats.rx.syncp);
|
|
++rx_ring->stats.rx.xdp_drop;
|
|
u64_stats_update_end(&rx_ring->stats.rx.syncp);
|
|
break;
|
|
}
|
|
|
|
return ERR_PTR(-result);
|
|
}
|
|
|
|
static bool aq_add_rx_fragment(struct device *dev,
|
|
struct aq_ring_s *ring,
|
|
struct aq_ring_buff_s *buff,
|
|
struct xdp_buff *xdp)
|
|
{
|
|
struct skb_shared_info *sinfo = xdp_get_shared_info_from_buff(xdp);
|
|
struct aq_ring_buff_s *buff_ = buff;
|
|
|
|
memset(sinfo, 0, sizeof(*sinfo));
|
|
do {
|
|
skb_frag_t *frag;
|
|
|
|
if (unlikely(sinfo->nr_frags >= MAX_SKB_FRAGS))
|
|
return true;
|
|
|
|
frag = &sinfo->frags[sinfo->nr_frags++];
|
|
buff_ = &ring->buff_ring[buff_->next];
|
|
dma_sync_single_range_for_cpu(dev,
|
|
buff_->rxdata.daddr,
|
|
buff_->rxdata.pg_off,
|
|
buff_->len,
|
|
DMA_FROM_DEVICE);
|
|
skb_frag_off_set(frag, buff_->rxdata.pg_off);
|
|
skb_frag_size_set(frag, buff_->len);
|
|
sinfo->xdp_frags_size += buff_->len;
|
|
__skb_frag_set_page(frag, buff_->rxdata.page);
|
|
|
|
buff_->is_cleaned = 1;
|
|
|
|
buff->is_ip_cso &= buff_->is_ip_cso;
|
|
buff->is_udp_cso &= buff_->is_udp_cso;
|
|
buff->is_tcp_cso &= buff_->is_tcp_cso;
|
|
buff->is_cso_err |= buff_->is_cso_err;
|
|
|
|
if (page_is_pfmemalloc(buff_->rxdata.page))
|
|
xdp_buff_set_frag_pfmemalloc(xdp);
|
|
|
|
} while (!buff_->is_eop);
|
|
|
|
xdp_buff_set_frags_flag(xdp);
|
|
|
|
return false;
|
|
}
|
|
|
|
static int __aq_ring_rx_clean(struct aq_ring_s *self, struct napi_struct *napi,
|
|
int *work_done, int budget)
|
|
{
|
|
struct net_device *ndev = aq_nic_get_ndev(self->aq_nic);
|
|
int err = 0;
|
|
|
|
for (; (self->sw_head != self->hw_head) && budget;
|
|
self->sw_head = aq_ring_next_dx(self, self->sw_head),
|
|
--budget, ++(*work_done)) {
|
|
struct aq_ring_buff_s *buff = &self->buff_ring[self->sw_head];
|
|
bool is_ptp_ring = aq_ptp_ring(self->aq_nic, self);
|
|
struct aq_ring_buff_s *buff_ = NULL;
|
|
struct sk_buff *skb = NULL;
|
|
unsigned int next_ = 0U;
|
|
unsigned int i = 0U;
|
|
u16 hdr_len;
|
|
|
|
if (buff->is_cleaned)
|
|
continue;
|
|
|
|
if (!buff->is_eop) {
|
|
unsigned int frag_cnt = 0U;
|
|
buff_ = buff;
|
|
do {
|
|
bool is_rsc_completed = true;
|
|
|
|
if (buff_->next >= self->size) {
|
|
err = -EIO;
|
|
goto err_exit;
|
|
}
|
|
|
|
frag_cnt++;
|
|
next_ = buff_->next,
|
|
buff_ = &self->buff_ring[next_];
|
|
is_rsc_completed =
|
|
aq_ring_dx_in_range(self->sw_head,
|
|
next_,
|
|
self->hw_head);
|
|
|
|
if (unlikely(!is_rsc_completed) ||
|
|
frag_cnt > MAX_SKB_FRAGS) {
|
|
err = 0;
|
|
goto err_exit;
|
|
}
|
|
|
|
buff->is_error |= buff_->is_error;
|
|
buff->is_cso_err |= buff_->is_cso_err;
|
|
|
|
} while (!buff_->is_eop);
|
|
|
|
if (buff->is_error ||
|
|
(buff->is_lro && buff->is_cso_err)) {
|
|
buff_ = buff;
|
|
do {
|
|
if (buff_->next >= self->size) {
|
|
err = -EIO;
|
|
goto err_exit;
|
|
}
|
|
next_ = buff_->next,
|
|
buff_ = &self->buff_ring[next_];
|
|
|
|
buff_->is_cleaned = true;
|
|
} while (!buff_->is_eop);
|
|
|
|
u64_stats_update_begin(&self->stats.rx.syncp);
|
|
++self->stats.rx.errors;
|
|
u64_stats_update_end(&self->stats.rx.syncp);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (buff->is_error) {
|
|
u64_stats_update_begin(&self->stats.rx.syncp);
|
|
++self->stats.rx.errors;
|
|
u64_stats_update_end(&self->stats.rx.syncp);
|
|
continue;
|
|
}
|
|
|
|
dma_sync_single_range_for_cpu(aq_nic_get_dev(self->aq_nic),
|
|
buff->rxdata.daddr,
|
|
buff->rxdata.pg_off,
|
|
buff->len, DMA_FROM_DEVICE);
|
|
|
|
skb = napi_alloc_skb(napi, AQ_CFG_RX_HDR_SIZE);
|
|
if (unlikely(!skb)) {
|
|
u64_stats_update_begin(&self->stats.rx.syncp);
|
|
self->stats.rx.skb_alloc_fails++;
|
|
u64_stats_update_end(&self->stats.rx.syncp);
|
|
err = -ENOMEM;
|
|
goto err_exit;
|
|
}
|
|
if (is_ptp_ring)
|
|
buff->len -=
|
|
aq_ptp_extract_ts(self->aq_nic, skb,
|
|
aq_buf_vaddr(&buff->rxdata),
|
|
buff->len);
|
|
|
|
hdr_len = buff->len;
|
|
if (hdr_len > AQ_CFG_RX_HDR_SIZE)
|
|
hdr_len = eth_get_headlen(skb->dev,
|
|
aq_buf_vaddr(&buff->rxdata),
|
|
AQ_CFG_RX_HDR_SIZE);
|
|
|
|
memcpy(__skb_put(skb, hdr_len), aq_buf_vaddr(&buff->rxdata),
|
|
ALIGN(hdr_len, sizeof(long)));
|
|
|
|
if (buff->len - hdr_len > 0) {
|
|
skb_add_rx_frag(skb, i++, buff->rxdata.page,
|
|
buff->rxdata.pg_off + hdr_len,
|
|
buff->len - hdr_len,
|
|
self->frame_max);
|
|
page_ref_inc(buff->rxdata.page);
|
|
}
|
|
|
|
if (!buff->is_eop) {
|
|
buff_ = buff;
|
|
do {
|
|
next_ = buff_->next;
|
|
buff_ = &self->buff_ring[next_];
|
|
|
|
dma_sync_single_range_for_cpu(aq_nic_get_dev(self->aq_nic),
|
|
buff_->rxdata.daddr,
|
|
buff_->rxdata.pg_off,
|
|
buff_->len,
|
|
DMA_FROM_DEVICE);
|
|
skb_add_rx_frag(skb, i++,
|
|
buff_->rxdata.page,
|
|
buff_->rxdata.pg_off,
|
|
buff_->len,
|
|
self->frame_max);
|
|
page_ref_inc(buff_->rxdata.page);
|
|
buff_->is_cleaned = 1;
|
|
|
|
buff->is_ip_cso &= buff_->is_ip_cso;
|
|
buff->is_udp_cso &= buff_->is_udp_cso;
|
|
buff->is_tcp_cso &= buff_->is_tcp_cso;
|
|
buff->is_cso_err |= buff_->is_cso_err;
|
|
|
|
} while (!buff_->is_eop);
|
|
}
|
|
|
|
if (buff->is_vlan)
|
|
__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
|
|
buff->vlan_rx_tag);
|
|
|
|
skb->protocol = eth_type_trans(skb, ndev);
|
|
|
|
aq_rx_checksum(self, buff, skb);
|
|
|
|
skb_set_hash(skb, buff->rss_hash,
|
|
buff->is_hash_l4 ? PKT_HASH_TYPE_L4 :
|
|
PKT_HASH_TYPE_NONE);
|
|
/* Send all PTP traffic to 0 queue */
|
|
skb_record_rx_queue(skb,
|
|
is_ptp_ring ? 0
|
|
: AQ_NIC_RING2QMAP(self->aq_nic,
|
|
self->idx));
|
|
|
|
u64_stats_update_begin(&self->stats.rx.syncp);
|
|
++self->stats.rx.packets;
|
|
self->stats.rx.bytes += skb->len;
|
|
u64_stats_update_end(&self->stats.rx.syncp);
|
|
|
|
napi_gro_receive(napi, skb);
|
|
}
|
|
|
|
err_exit:
|
|
return err;
|
|
}
|
|
|
|
static int __aq_ring_xdp_clean(struct aq_ring_s *rx_ring,
|
|
struct napi_struct *napi, int *work_done,
|
|
int budget)
|
|
{
|
|
int frame_sz = rx_ring->page_offset + rx_ring->frame_max +
|
|
rx_ring->tail_size;
|
|
struct aq_nic_s *aq_nic = rx_ring->aq_nic;
|
|
bool is_rsc_completed = true;
|
|
struct device *dev;
|
|
int err = 0;
|
|
|
|
dev = aq_nic_get_dev(aq_nic);
|
|
for (; (rx_ring->sw_head != rx_ring->hw_head) && budget;
|
|
rx_ring->sw_head = aq_ring_next_dx(rx_ring, rx_ring->sw_head),
|
|
--budget, ++(*work_done)) {
|
|
struct aq_ring_buff_s *buff = &rx_ring->buff_ring[rx_ring->sw_head];
|
|
bool is_ptp_ring = aq_ptp_ring(rx_ring->aq_nic, rx_ring);
|
|
struct aq_ring_buff_s *buff_ = NULL;
|
|
struct sk_buff *skb = NULL;
|
|
unsigned int next_ = 0U;
|
|
struct xdp_buff xdp;
|
|
void *hard_start;
|
|
|
|
if (buff->is_cleaned)
|
|
continue;
|
|
|
|
if (!buff->is_eop) {
|
|
buff_ = buff;
|
|
do {
|
|
if (buff_->next >= rx_ring->size) {
|
|
err = -EIO;
|
|
goto err_exit;
|
|
}
|
|
next_ = buff_->next;
|
|
buff_ = &rx_ring->buff_ring[next_];
|
|
is_rsc_completed =
|
|
aq_ring_dx_in_range(rx_ring->sw_head,
|
|
next_,
|
|
rx_ring->hw_head);
|
|
|
|
if (unlikely(!is_rsc_completed))
|
|
break;
|
|
|
|
buff->is_error |= buff_->is_error;
|
|
buff->is_cso_err |= buff_->is_cso_err;
|
|
} while (!buff_->is_eop);
|
|
|
|
if (!is_rsc_completed) {
|
|
err = 0;
|
|
goto err_exit;
|
|
}
|
|
if (buff->is_error ||
|
|
(buff->is_lro && buff->is_cso_err)) {
|
|
buff_ = buff;
|
|
do {
|
|
if (buff_->next >= rx_ring->size) {
|
|
err = -EIO;
|
|
goto err_exit;
|
|
}
|
|
next_ = buff_->next;
|
|
buff_ = &rx_ring->buff_ring[next_];
|
|
|
|
buff_->is_cleaned = true;
|
|
} while (!buff_->is_eop);
|
|
|
|
u64_stats_update_begin(&rx_ring->stats.rx.syncp);
|
|
++rx_ring->stats.rx.errors;
|
|
u64_stats_update_end(&rx_ring->stats.rx.syncp);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (buff->is_error) {
|
|
u64_stats_update_begin(&rx_ring->stats.rx.syncp);
|
|
++rx_ring->stats.rx.errors;
|
|
u64_stats_update_end(&rx_ring->stats.rx.syncp);
|
|
continue;
|
|
}
|
|
|
|
dma_sync_single_range_for_cpu(dev,
|
|
buff->rxdata.daddr,
|
|
buff->rxdata.pg_off,
|
|
buff->len, DMA_FROM_DEVICE);
|
|
hard_start = page_address(buff->rxdata.page) +
|
|
buff->rxdata.pg_off - rx_ring->page_offset;
|
|
|
|
if (is_ptp_ring)
|
|
buff->len -=
|
|
aq_ptp_extract_ts(rx_ring->aq_nic, skb,
|
|
aq_buf_vaddr(&buff->rxdata),
|
|
buff->len);
|
|
|
|
xdp_init_buff(&xdp, frame_sz, &rx_ring->xdp_rxq);
|
|
xdp_prepare_buff(&xdp, hard_start, rx_ring->page_offset,
|
|
buff->len, false);
|
|
if (!buff->is_eop) {
|
|
if (aq_add_rx_fragment(dev, rx_ring, buff, &xdp)) {
|
|
u64_stats_update_begin(&rx_ring->stats.rx.syncp);
|
|
++rx_ring->stats.rx.packets;
|
|
rx_ring->stats.rx.bytes += xdp_get_buff_len(&xdp);
|
|
++rx_ring->stats.rx.xdp_aborted;
|
|
u64_stats_update_end(&rx_ring->stats.rx.syncp);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
skb = aq_xdp_run_prog(aq_nic, &xdp, rx_ring, buff);
|
|
if (IS_ERR(skb) || !skb)
|
|
continue;
|
|
|
|
if (buff->is_vlan)
|
|
__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
|
|
buff->vlan_rx_tag);
|
|
|
|
aq_rx_checksum(rx_ring, buff, skb);
|
|
|
|
skb_set_hash(skb, buff->rss_hash,
|
|
buff->is_hash_l4 ? PKT_HASH_TYPE_L4 :
|
|
PKT_HASH_TYPE_NONE);
|
|
/* Send all PTP traffic to 0 queue */
|
|
skb_record_rx_queue(skb,
|
|
is_ptp_ring ? 0
|
|
: AQ_NIC_RING2QMAP(rx_ring->aq_nic,
|
|
rx_ring->idx));
|
|
|
|
napi_gro_receive(napi, skb);
|
|
}
|
|
|
|
err_exit:
|
|
return err;
|
|
}
|
|
|
|
int aq_ring_rx_clean(struct aq_ring_s *self,
|
|
struct napi_struct *napi,
|
|
int *work_done,
|
|
int budget)
|
|
{
|
|
if (static_branch_unlikely(&aq_xdp_locking_key))
|
|
return __aq_ring_xdp_clean(self, napi, work_done, budget);
|
|
else
|
|
return __aq_ring_rx_clean(self, napi, work_done, budget);
|
|
}
|
|
|
|
void aq_ring_hwts_rx_clean(struct aq_ring_s *self, struct aq_nic_s *aq_nic)
|
|
{
|
|
#if IS_REACHABLE(CONFIG_PTP_1588_CLOCK)
|
|
while (self->sw_head != self->hw_head) {
|
|
u64 ns;
|
|
|
|
aq_nic->aq_hw_ops->extract_hwts(aq_nic->aq_hw,
|
|
self->dx_ring +
|
|
(self->sw_head * self->dx_size),
|
|
self->dx_size, &ns);
|
|
aq_ptp_tx_hwtstamp(aq_nic, ns);
|
|
|
|
self->sw_head = aq_ring_next_dx(self, self->sw_head);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
int aq_ring_rx_fill(struct aq_ring_s *self)
|
|
{
|
|
struct aq_ring_buff_s *buff = NULL;
|
|
int err = 0;
|
|
int i = 0;
|
|
|
|
if (aq_ring_avail_dx(self) < min_t(unsigned int, AQ_CFG_RX_REFILL_THRES,
|
|
self->size / 2))
|
|
return err;
|
|
|
|
for (i = aq_ring_avail_dx(self); i--;
|
|
self->sw_tail = aq_ring_next_dx(self, self->sw_tail)) {
|
|
buff = &self->buff_ring[self->sw_tail];
|
|
|
|
buff->flags = 0U;
|
|
buff->len = self->frame_max;
|
|
|
|
err = aq_get_rxpages(self, buff);
|
|
if (err)
|
|
goto err_exit;
|
|
|
|
buff->pa = aq_buf_daddr(&buff->rxdata);
|
|
buff = NULL;
|
|
}
|
|
|
|
err_exit:
|
|
return err;
|
|
}
|
|
|
|
void aq_ring_rx_deinit(struct aq_ring_s *self)
|
|
{
|
|
if (!self)
|
|
return;
|
|
|
|
for (; self->sw_head != self->sw_tail;
|
|
self->sw_head = aq_ring_next_dx(self, self->sw_head)) {
|
|
struct aq_ring_buff_s *buff = &self->buff_ring[self->sw_head];
|
|
|
|
aq_free_rxpage(&buff->rxdata, aq_nic_get_dev(self->aq_nic));
|
|
}
|
|
}
|
|
|
|
void aq_ring_free(struct aq_ring_s *self)
|
|
{
|
|
if (!self)
|
|
return;
|
|
|
|
kfree(self->buff_ring);
|
|
|
|
if (self->dx_ring)
|
|
dma_free_coherent(aq_nic_get_dev(self->aq_nic),
|
|
self->size * self->dx_size, self->dx_ring,
|
|
self->dx_ring_pa);
|
|
}
|
|
|
|
unsigned int aq_ring_fill_stats_data(struct aq_ring_s *self, u64 *data)
|
|
{
|
|
unsigned int count;
|
|
unsigned int start;
|
|
|
|
if (self->ring_type == ATL_RING_RX) {
|
|
/* This data should mimic aq_ethtool_queue_rx_stat_names structure */
|
|
do {
|
|
count = 0;
|
|
start = u64_stats_fetch_begin_irq(&self->stats.rx.syncp);
|
|
data[count] = self->stats.rx.packets;
|
|
data[++count] = self->stats.rx.jumbo_packets;
|
|
data[++count] = self->stats.rx.lro_packets;
|
|
data[++count] = self->stats.rx.errors;
|
|
data[++count] = self->stats.rx.alloc_fails;
|
|
data[++count] = self->stats.rx.skb_alloc_fails;
|
|
data[++count] = self->stats.rx.polls;
|
|
data[++count] = self->stats.rx.pg_flips;
|
|
data[++count] = self->stats.rx.pg_reuses;
|
|
data[++count] = self->stats.rx.pg_losts;
|
|
data[++count] = self->stats.rx.xdp_aborted;
|
|
data[++count] = self->stats.rx.xdp_drop;
|
|
data[++count] = self->stats.rx.xdp_pass;
|
|
data[++count] = self->stats.rx.xdp_tx;
|
|
data[++count] = self->stats.rx.xdp_invalid;
|
|
data[++count] = self->stats.rx.xdp_redirect;
|
|
} while (u64_stats_fetch_retry_irq(&self->stats.rx.syncp, start));
|
|
} else {
|
|
/* This data should mimic aq_ethtool_queue_tx_stat_names structure */
|
|
do {
|
|
count = 0;
|
|
start = u64_stats_fetch_begin_irq(&self->stats.tx.syncp);
|
|
data[count] = self->stats.tx.packets;
|
|
data[++count] = self->stats.tx.queue_restarts;
|
|
} while (u64_stats_fetch_retry_irq(&self->stats.tx.syncp, start));
|
|
}
|
|
|
|
return ++count;
|
|
}
|