983 lines
23 KiB
C
983 lines
23 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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#include <linux/bpf.h>
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#include <linux/filter.h>
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#include <net/page_pool/helpers.h>
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#include "lan966x_main.h"
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static int lan966x_fdma_rx_dataptr_cb(struct fdma *fdma, int dcb, int db,
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u64 *dataptr)
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{
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struct lan966x *lan966x = (struct lan966x *)fdma->priv;
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struct lan966x_rx *rx = &lan966x->rx;
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struct page *page;
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page = page_pool_dev_alloc_pages(rx->page_pool);
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if (unlikely(!page))
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return -ENOMEM;
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rx->page[dcb][db] = page;
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*dataptr = page_pool_get_dma_addr(page) + XDP_PACKET_HEADROOM;
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return 0;
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}
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static int lan966x_fdma_tx_dataptr_cb(struct fdma *fdma, int dcb, int db,
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u64 *dataptr)
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{
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struct lan966x *lan966x = (struct lan966x *)fdma->priv;
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*dataptr = lan966x->tx.dcbs_buf[dcb].dma_addr;
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return 0;
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}
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static int lan966x_fdma_xdp_tx_dataptr_cb(struct fdma *fdma, int dcb, int db,
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u64 *dataptr)
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{
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struct lan966x *lan966x = (struct lan966x *)fdma->priv;
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*dataptr = lan966x->tx.dcbs_buf[dcb].dma_addr + XDP_PACKET_HEADROOM;
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return 0;
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}
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static int lan966x_fdma_channel_active(struct lan966x *lan966x)
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{
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return lan_rd(lan966x, FDMA_CH_ACTIVE);
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}
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static void lan966x_fdma_rx_free_pages(struct lan966x_rx *rx)
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{
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struct fdma *fdma = &rx->fdma;
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int i, j;
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for (i = 0; i < fdma->n_dcbs; ++i) {
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for (j = 0; j < fdma->n_dbs; ++j)
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page_pool_put_full_page(rx->page_pool,
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rx->page[i][j], false);
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}
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}
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static void lan966x_fdma_rx_free_page(struct lan966x_rx *rx)
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{
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struct fdma *fdma = &rx->fdma;
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struct page *page;
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page = rx->page[fdma->dcb_index][fdma->db_index];
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if (unlikely(!page))
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return;
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page_pool_recycle_direct(rx->page_pool, page);
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}
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static int lan966x_fdma_rx_alloc_page_pool(struct lan966x_rx *rx)
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{
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struct lan966x *lan966x = rx->lan966x;
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struct page_pool_params pp_params = {
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.order = rx->page_order,
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.flags = PP_FLAG_DMA_MAP | PP_FLAG_DMA_SYNC_DEV,
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.pool_size = rx->fdma.n_dcbs,
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.nid = NUMA_NO_NODE,
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.dev = lan966x->dev,
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.dma_dir = DMA_FROM_DEVICE,
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.offset = XDP_PACKET_HEADROOM,
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.max_len = rx->max_mtu -
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SKB_DATA_ALIGN(sizeof(struct skb_shared_info)),
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};
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if (lan966x_xdp_present(lan966x))
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pp_params.dma_dir = DMA_BIDIRECTIONAL;
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rx->page_pool = page_pool_create(&pp_params);
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for (int i = 0; i < lan966x->num_phys_ports; ++i) {
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struct lan966x_port *port;
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if (!lan966x->ports[i])
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continue;
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port = lan966x->ports[i];
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xdp_rxq_info_unreg_mem_model(&port->xdp_rxq);
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xdp_rxq_info_reg_mem_model(&port->xdp_rxq, MEM_TYPE_PAGE_POOL,
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rx->page_pool);
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}
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return PTR_ERR_OR_ZERO(rx->page_pool);
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}
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static int lan966x_fdma_rx_alloc(struct lan966x_rx *rx)
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{
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struct lan966x *lan966x = rx->lan966x;
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struct fdma *fdma = &rx->fdma;
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int err;
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if (lan966x_fdma_rx_alloc_page_pool(rx))
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return PTR_ERR(rx->page_pool);
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err = fdma_alloc_coherent(lan966x->dev, fdma);
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if (err)
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return err;
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fdma_dcbs_init(fdma, FDMA_DCB_INFO_DATAL(fdma->db_size),
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FDMA_DCB_STATUS_INTR);
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return 0;
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}
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static void lan966x_fdma_rx_start(struct lan966x_rx *rx)
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{
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struct lan966x *lan966x = rx->lan966x;
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struct fdma *fdma = &rx->fdma;
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u32 mask;
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/* When activating a channel, first is required to write the first DCB
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* address and then to activate it
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*/
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lan_wr(lower_32_bits((u64)fdma->dma), lan966x,
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FDMA_DCB_LLP(fdma->channel_id));
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lan_wr(upper_32_bits((u64)fdma->dma), lan966x,
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FDMA_DCB_LLP1(fdma->channel_id));
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lan_wr(FDMA_CH_CFG_CH_DCB_DB_CNT_SET(fdma->n_dbs) |
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FDMA_CH_CFG_CH_INTR_DB_EOF_ONLY_SET(1) |
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FDMA_CH_CFG_CH_INJ_PORT_SET(0) |
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FDMA_CH_CFG_CH_MEM_SET(1),
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lan966x, FDMA_CH_CFG(fdma->channel_id));
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/* Start fdma */
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lan_rmw(FDMA_PORT_CTRL_XTR_STOP_SET(0),
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FDMA_PORT_CTRL_XTR_STOP,
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lan966x, FDMA_PORT_CTRL(0));
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/* Enable interrupts */
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mask = lan_rd(lan966x, FDMA_INTR_DB_ENA);
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mask = FDMA_INTR_DB_ENA_INTR_DB_ENA_GET(mask);
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mask |= BIT(fdma->channel_id);
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lan_rmw(FDMA_INTR_DB_ENA_INTR_DB_ENA_SET(mask),
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FDMA_INTR_DB_ENA_INTR_DB_ENA,
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lan966x, FDMA_INTR_DB_ENA);
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/* Activate the channel */
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lan_rmw(FDMA_CH_ACTIVATE_CH_ACTIVATE_SET(BIT(fdma->channel_id)),
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FDMA_CH_ACTIVATE_CH_ACTIVATE,
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lan966x, FDMA_CH_ACTIVATE);
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}
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static void lan966x_fdma_rx_disable(struct lan966x_rx *rx)
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{
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struct lan966x *lan966x = rx->lan966x;
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struct fdma *fdma = &rx->fdma;
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u32 val;
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/* Disable the channel */
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lan_rmw(FDMA_CH_DISABLE_CH_DISABLE_SET(BIT(fdma->channel_id)),
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FDMA_CH_DISABLE_CH_DISABLE,
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lan966x, FDMA_CH_DISABLE);
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readx_poll_timeout_atomic(lan966x_fdma_channel_active, lan966x,
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val, !(val & BIT(fdma->channel_id)),
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READL_SLEEP_US, READL_TIMEOUT_US);
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lan_rmw(FDMA_CH_DB_DISCARD_DB_DISCARD_SET(BIT(fdma->channel_id)),
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FDMA_CH_DB_DISCARD_DB_DISCARD,
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lan966x, FDMA_CH_DB_DISCARD);
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}
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static void lan966x_fdma_rx_reload(struct lan966x_rx *rx)
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{
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struct lan966x *lan966x = rx->lan966x;
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lan_rmw(FDMA_CH_RELOAD_CH_RELOAD_SET(BIT(rx->fdma.channel_id)),
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FDMA_CH_RELOAD_CH_RELOAD,
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lan966x, FDMA_CH_RELOAD);
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}
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static int lan966x_fdma_tx_alloc(struct lan966x_tx *tx)
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{
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struct lan966x *lan966x = tx->lan966x;
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struct fdma *fdma = &tx->fdma;
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int err;
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tx->dcbs_buf = kcalloc(fdma->n_dcbs, sizeof(struct lan966x_tx_dcb_buf),
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GFP_KERNEL);
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if (!tx->dcbs_buf)
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return -ENOMEM;
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err = fdma_alloc_coherent(lan966x->dev, fdma);
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if (err)
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goto out;
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fdma_dcbs_init(fdma, 0, 0);
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return 0;
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out:
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kfree(tx->dcbs_buf);
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return -ENOMEM;
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}
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static void lan966x_fdma_tx_free(struct lan966x_tx *tx)
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{
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struct lan966x *lan966x = tx->lan966x;
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kfree(tx->dcbs_buf);
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fdma_free_coherent(lan966x->dev, &tx->fdma);
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}
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static void lan966x_fdma_tx_activate(struct lan966x_tx *tx)
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{
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struct lan966x *lan966x = tx->lan966x;
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struct fdma *fdma = &tx->fdma;
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u32 mask;
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/* When activating a channel, first is required to write the first DCB
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* address and then to activate it
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*/
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lan_wr(lower_32_bits((u64)fdma->dma), lan966x,
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FDMA_DCB_LLP(fdma->channel_id));
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lan_wr(upper_32_bits((u64)fdma->dma), lan966x,
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FDMA_DCB_LLP1(fdma->channel_id));
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lan_wr(FDMA_CH_CFG_CH_DCB_DB_CNT_SET(fdma->n_dbs) |
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FDMA_CH_CFG_CH_INTR_DB_EOF_ONLY_SET(1) |
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FDMA_CH_CFG_CH_INJ_PORT_SET(0) |
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FDMA_CH_CFG_CH_MEM_SET(1),
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lan966x, FDMA_CH_CFG(fdma->channel_id));
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/* Start fdma */
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lan_rmw(FDMA_PORT_CTRL_INJ_STOP_SET(0),
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FDMA_PORT_CTRL_INJ_STOP,
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lan966x, FDMA_PORT_CTRL(0));
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/* Enable interrupts */
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mask = lan_rd(lan966x, FDMA_INTR_DB_ENA);
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mask = FDMA_INTR_DB_ENA_INTR_DB_ENA_GET(mask);
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mask |= BIT(fdma->channel_id);
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lan_rmw(FDMA_INTR_DB_ENA_INTR_DB_ENA_SET(mask),
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FDMA_INTR_DB_ENA_INTR_DB_ENA,
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lan966x, FDMA_INTR_DB_ENA);
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/* Activate the channel */
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lan_rmw(FDMA_CH_ACTIVATE_CH_ACTIVATE_SET(BIT(fdma->channel_id)),
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FDMA_CH_ACTIVATE_CH_ACTIVATE,
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lan966x, FDMA_CH_ACTIVATE);
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}
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static void lan966x_fdma_tx_disable(struct lan966x_tx *tx)
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{
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struct lan966x *lan966x = tx->lan966x;
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struct fdma *fdma = &tx->fdma;
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u32 val;
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/* Disable the channel */
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lan_rmw(FDMA_CH_DISABLE_CH_DISABLE_SET(BIT(fdma->channel_id)),
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FDMA_CH_DISABLE_CH_DISABLE,
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lan966x, FDMA_CH_DISABLE);
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readx_poll_timeout_atomic(lan966x_fdma_channel_active, lan966x,
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val, !(val & BIT(fdma->channel_id)),
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READL_SLEEP_US, READL_TIMEOUT_US);
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lan_rmw(FDMA_CH_DB_DISCARD_DB_DISCARD_SET(BIT(fdma->channel_id)),
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FDMA_CH_DB_DISCARD_DB_DISCARD,
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lan966x, FDMA_CH_DB_DISCARD);
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tx->activated = false;
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}
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static void lan966x_fdma_tx_reload(struct lan966x_tx *tx)
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{
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struct lan966x *lan966x = tx->lan966x;
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/* Write the registers to reload the channel */
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lan_rmw(FDMA_CH_RELOAD_CH_RELOAD_SET(BIT(tx->fdma.channel_id)),
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FDMA_CH_RELOAD_CH_RELOAD,
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lan966x, FDMA_CH_RELOAD);
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}
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static void lan966x_fdma_wakeup_netdev(struct lan966x *lan966x)
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{
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struct lan966x_port *port;
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int i;
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for (i = 0; i < lan966x->num_phys_ports; ++i) {
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port = lan966x->ports[i];
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if (!port)
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continue;
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if (netif_queue_stopped(port->dev))
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netif_wake_queue(port->dev);
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}
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}
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static void lan966x_fdma_stop_netdev(struct lan966x *lan966x)
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{
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struct lan966x_port *port;
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int i;
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for (i = 0; i < lan966x->num_phys_ports; ++i) {
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port = lan966x->ports[i];
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if (!port)
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continue;
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netif_stop_queue(port->dev);
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}
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}
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static void lan966x_fdma_tx_clear_buf(struct lan966x *lan966x, int weight)
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{
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struct lan966x_tx *tx = &lan966x->tx;
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struct lan966x_rx *rx = &lan966x->rx;
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struct lan966x_tx_dcb_buf *dcb_buf;
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struct fdma *fdma = &tx->fdma;
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struct xdp_frame_bulk bq;
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unsigned long flags;
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bool clear = false;
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struct fdma_db *db;
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int i;
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xdp_frame_bulk_init(&bq);
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spin_lock_irqsave(&lan966x->tx_lock, flags);
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for (i = 0; i < fdma->n_dcbs; ++i) {
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dcb_buf = &tx->dcbs_buf[i];
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if (!dcb_buf->used)
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continue;
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db = fdma_db_get(fdma, i, 0);
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if (!fdma_db_is_done(db))
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continue;
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dcb_buf->dev->stats.tx_packets++;
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dcb_buf->dev->stats.tx_bytes += dcb_buf->len;
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dcb_buf->used = false;
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if (dcb_buf->use_skb) {
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dma_unmap_single(lan966x->dev,
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dcb_buf->dma_addr,
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dcb_buf->len,
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DMA_TO_DEVICE);
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if (!dcb_buf->ptp)
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napi_consume_skb(dcb_buf->data.skb, weight);
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} else {
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if (dcb_buf->xdp_ndo)
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dma_unmap_single(lan966x->dev,
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dcb_buf->dma_addr,
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dcb_buf->len,
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DMA_TO_DEVICE);
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if (dcb_buf->xdp_ndo)
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xdp_return_frame_bulk(dcb_buf->data.xdpf, &bq);
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else
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page_pool_recycle_direct(rx->page_pool,
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dcb_buf->data.page);
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}
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clear = true;
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}
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xdp_flush_frame_bulk(&bq);
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if (clear)
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lan966x_fdma_wakeup_netdev(lan966x);
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spin_unlock_irqrestore(&lan966x->tx_lock, flags);
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}
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static int lan966x_fdma_rx_check_frame(struct lan966x_rx *rx, u64 *src_port)
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{
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struct lan966x *lan966x = rx->lan966x;
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struct fdma *fdma = &rx->fdma;
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struct lan966x_port *port;
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struct fdma_db *db;
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struct page *page;
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db = fdma_db_next_get(fdma);
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page = rx->page[fdma->dcb_index][fdma->db_index];
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if (unlikely(!page))
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return FDMA_ERROR;
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dma_sync_single_for_cpu(lan966x->dev,
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(dma_addr_t)db->dataptr + XDP_PACKET_HEADROOM,
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FDMA_DCB_STATUS_BLOCKL(db->status),
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DMA_FROM_DEVICE);
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lan966x_ifh_get_src_port(page_address(page) + XDP_PACKET_HEADROOM,
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src_port);
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if (WARN_ON(*src_port >= lan966x->num_phys_ports))
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return FDMA_ERROR;
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port = lan966x->ports[*src_port];
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if (!lan966x_xdp_port_present(port))
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return FDMA_PASS;
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return lan966x_xdp_run(port, page, FDMA_DCB_STATUS_BLOCKL(db->status));
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}
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static struct sk_buff *lan966x_fdma_rx_get_frame(struct lan966x_rx *rx,
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u64 src_port)
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{
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struct lan966x *lan966x = rx->lan966x;
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struct fdma *fdma = &rx->fdma;
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struct sk_buff *skb;
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struct fdma_db *db;
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struct page *page;
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u64 timestamp;
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/* Get the received frame and unmap it */
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db = fdma_db_next_get(fdma);
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page = rx->page[fdma->dcb_index][fdma->db_index];
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skb = build_skb(page_address(page), fdma->db_size);
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if (unlikely(!skb))
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goto free_page;
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skb_mark_for_recycle(skb);
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skb_reserve(skb, XDP_PACKET_HEADROOM);
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skb_put(skb, FDMA_DCB_STATUS_BLOCKL(db->status));
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lan966x_ifh_get_timestamp(skb->data, ×tamp);
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skb->dev = lan966x->ports[src_port]->dev;
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skb_pull(skb, IFH_LEN_BYTES);
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if (likely(!(skb->dev->features & NETIF_F_RXFCS)))
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skb_trim(skb, skb->len - ETH_FCS_LEN);
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lan966x_ptp_rxtstamp(lan966x, skb, src_port, timestamp);
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skb->protocol = eth_type_trans(skb, skb->dev);
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if (lan966x->bridge_mask & BIT(src_port)) {
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skb->offload_fwd_mark = 1;
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skb_reset_network_header(skb);
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if (!lan966x_hw_offload(lan966x, src_port, skb))
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skb->offload_fwd_mark = 0;
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}
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skb->dev->stats.rx_bytes += skb->len;
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skb->dev->stats.rx_packets++;
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|
|
return skb;
|
|
|
|
free_page:
|
|
page_pool_recycle_direct(rx->page_pool, page);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int lan966x_fdma_napi_poll(struct napi_struct *napi, int weight)
|
|
{
|
|
struct lan966x *lan966x = container_of(napi, struct lan966x, napi);
|
|
struct lan966x_rx *rx = &lan966x->rx;
|
|
int old_dcb, dcb_reload, counter = 0;
|
|
struct fdma *fdma = &rx->fdma;
|
|
bool redirect = false;
|
|
struct sk_buff *skb;
|
|
u64 src_port;
|
|
|
|
dcb_reload = fdma->dcb_index;
|
|
|
|
lan966x_fdma_tx_clear_buf(lan966x, weight);
|
|
|
|
/* Get all received skb */
|
|
while (counter < weight) {
|
|
if (!fdma_has_frames(fdma))
|
|
break;
|
|
|
|
counter++;
|
|
|
|
switch (lan966x_fdma_rx_check_frame(rx, &src_port)) {
|
|
case FDMA_PASS:
|
|
break;
|
|
case FDMA_ERROR:
|
|
lan966x_fdma_rx_free_page(rx);
|
|
fdma_dcb_advance(fdma);
|
|
goto allocate_new;
|
|
case FDMA_REDIRECT:
|
|
redirect = true;
|
|
fallthrough;
|
|
case FDMA_TX:
|
|
fdma_dcb_advance(fdma);
|
|
continue;
|
|
case FDMA_DROP:
|
|
lan966x_fdma_rx_free_page(rx);
|
|
fdma_dcb_advance(fdma);
|
|
continue;
|
|
}
|
|
|
|
skb = lan966x_fdma_rx_get_frame(rx, src_port);
|
|
fdma_dcb_advance(fdma);
|
|
if (!skb)
|
|
goto allocate_new;
|
|
|
|
napi_gro_receive(&lan966x->napi, skb);
|
|
}
|
|
|
|
allocate_new:
|
|
/* Allocate new pages and map them */
|
|
while (dcb_reload != fdma->dcb_index) {
|
|
old_dcb = dcb_reload;
|
|
dcb_reload++;
|
|
dcb_reload &= fdma->n_dcbs - 1;
|
|
|
|
fdma_dcb_add(fdma, old_dcb, FDMA_DCB_INFO_DATAL(fdma->db_size),
|
|
FDMA_DCB_STATUS_INTR);
|
|
|
|
lan966x_fdma_rx_reload(rx);
|
|
}
|
|
|
|
if (redirect)
|
|
xdp_do_flush();
|
|
|
|
if (counter < weight && napi_complete_done(napi, counter))
|
|
lan_wr(0xff, lan966x, FDMA_INTR_DB_ENA);
|
|
|
|
return counter;
|
|
}
|
|
|
|
irqreturn_t lan966x_fdma_irq_handler(int irq, void *args)
|
|
{
|
|
struct lan966x *lan966x = args;
|
|
u32 db, err, err_type;
|
|
|
|
db = lan_rd(lan966x, FDMA_INTR_DB);
|
|
err = lan_rd(lan966x, FDMA_INTR_ERR);
|
|
|
|
if (db) {
|
|
lan_wr(0, lan966x, FDMA_INTR_DB_ENA);
|
|
lan_wr(db, lan966x, FDMA_INTR_DB);
|
|
|
|
napi_schedule(&lan966x->napi);
|
|
}
|
|
|
|
if (err) {
|
|
err_type = lan_rd(lan966x, FDMA_ERRORS);
|
|
|
|
WARN(1, "Unexpected error: %d, error_type: %d\n", err, err_type);
|
|
|
|
lan_wr(err, lan966x, FDMA_INTR_ERR);
|
|
lan_wr(err_type, lan966x, FDMA_ERRORS);
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int lan966x_fdma_get_next_dcb(struct lan966x_tx *tx)
|
|
{
|
|
struct lan966x_tx_dcb_buf *dcb_buf;
|
|
struct fdma *fdma = &tx->fdma;
|
|
int i;
|
|
|
|
for (i = 0; i < fdma->n_dcbs; ++i) {
|
|
dcb_buf = &tx->dcbs_buf[i];
|
|
if (!dcb_buf->used &&
|
|
!fdma_is_last(&tx->fdma, &tx->fdma.dcbs[i]))
|
|
return i;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
static void lan966x_fdma_tx_start(struct lan966x_tx *tx)
|
|
{
|
|
struct lan966x *lan966x = tx->lan966x;
|
|
|
|
if (likely(lan966x->tx.activated)) {
|
|
lan966x_fdma_tx_reload(tx);
|
|
} else {
|
|
/* Because it is first time, then just activate */
|
|
lan966x->tx.activated = true;
|
|
lan966x_fdma_tx_activate(tx);
|
|
}
|
|
}
|
|
|
|
int lan966x_fdma_xmit_xdpf(struct lan966x_port *port, void *ptr, u32 len)
|
|
{
|
|
struct lan966x *lan966x = port->lan966x;
|
|
struct lan966x_tx_dcb_buf *next_dcb_buf;
|
|
struct lan966x_tx *tx = &lan966x->tx;
|
|
struct xdp_frame *xdpf;
|
|
dma_addr_t dma_addr;
|
|
struct page *page;
|
|
int next_to_use;
|
|
__be32 *ifh;
|
|
int ret = 0;
|
|
|
|
spin_lock(&lan966x->tx_lock);
|
|
|
|
/* Get next index */
|
|
next_to_use = lan966x_fdma_get_next_dcb(tx);
|
|
if (next_to_use < 0) {
|
|
netif_stop_queue(port->dev);
|
|
ret = NETDEV_TX_BUSY;
|
|
goto out;
|
|
}
|
|
|
|
/* Get the next buffer */
|
|
next_dcb_buf = &tx->dcbs_buf[next_to_use];
|
|
|
|
/* Generate new IFH */
|
|
if (!len) {
|
|
xdpf = ptr;
|
|
|
|
if (xdpf->headroom < IFH_LEN_BYTES) {
|
|
ret = NETDEV_TX_OK;
|
|
goto out;
|
|
}
|
|
|
|
ifh = xdpf->data - IFH_LEN_BYTES;
|
|
memset(ifh, 0x0, sizeof(__be32) * IFH_LEN);
|
|
lan966x_ifh_set_bypass(ifh, 1);
|
|
lan966x_ifh_set_port(ifh, BIT_ULL(port->chip_port));
|
|
|
|
dma_addr = dma_map_single(lan966x->dev,
|
|
xdpf->data - IFH_LEN_BYTES,
|
|
xdpf->len + IFH_LEN_BYTES,
|
|
DMA_TO_DEVICE);
|
|
if (dma_mapping_error(lan966x->dev, dma_addr)) {
|
|
ret = NETDEV_TX_OK;
|
|
goto out;
|
|
}
|
|
|
|
next_dcb_buf->data.xdpf = xdpf;
|
|
next_dcb_buf->len = xdpf->len + IFH_LEN_BYTES;
|
|
} else {
|
|
page = ptr;
|
|
|
|
ifh = page_address(page) + XDP_PACKET_HEADROOM;
|
|
memset(ifh, 0x0, sizeof(__be32) * IFH_LEN);
|
|
lan966x_ifh_set_bypass(ifh, 1);
|
|
lan966x_ifh_set_port(ifh, BIT_ULL(port->chip_port));
|
|
|
|
dma_addr = page_pool_get_dma_addr(page);
|
|
dma_sync_single_for_device(lan966x->dev,
|
|
dma_addr + XDP_PACKET_HEADROOM,
|
|
len + IFH_LEN_BYTES,
|
|
DMA_TO_DEVICE);
|
|
|
|
next_dcb_buf->data.page = page;
|
|
next_dcb_buf->len = len + IFH_LEN_BYTES;
|
|
}
|
|
|
|
/* Fill up the buffer */
|
|
next_dcb_buf->use_skb = false;
|
|
next_dcb_buf->xdp_ndo = !len;
|
|
next_dcb_buf->dma_addr = dma_addr;
|
|
next_dcb_buf->used = true;
|
|
next_dcb_buf->ptp = false;
|
|
next_dcb_buf->dev = port->dev;
|
|
|
|
__fdma_dcb_add(&tx->fdma,
|
|
next_to_use,
|
|
0,
|
|
FDMA_DCB_STATUS_INTR |
|
|
FDMA_DCB_STATUS_SOF |
|
|
FDMA_DCB_STATUS_EOF |
|
|
FDMA_DCB_STATUS_BLOCKO(0) |
|
|
FDMA_DCB_STATUS_BLOCKL(next_dcb_buf->len),
|
|
&fdma_nextptr_cb,
|
|
&lan966x_fdma_xdp_tx_dataptr_cb);
|
|
|
|
/* Start the transmission */
|
|
lan966x_fdma_tx_start(tx);
|
|
|
|
out:
|
|
spin_unlock(&lan966x->tx_lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int lan966x_fdma_xmit(struct sk_buff *skb, __be32 *ifh, struct net_device *dev)
|
|
{
|
|
struct lan966x_port *port = netdev_priv(dev);
|
|
struct lan966x *lan966x = port->lan966x;
|
|
struct lan966x_tx_dcb_buf *next_dcb_buf;
|
|
struct lan966x_tx *tx = &lan966x->tx;
|
|
int needed_headroom;
|
|
int needed_tailroom;
|
|
dma_addr_t dma_addr;
|
|
int next_to_use;
|
|
int err;
|
|
|
|
/* Get next index */
|
|
next_to_use = lan966x_fdma_get_next_dcb(tx);
|
|
if (next_to_use < 0) {
|
|
netif_stop_queue(dev);
|
|
return NETDEV_TX_BUSY;
|
|
}
|
|
|
|
if (skb_put_padto(skb, ETH_ZLEN)) {
|
|
dev->stats.tx_dropped++;
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
/* skb processing */
|
|
needed_headroom = max_t(int, IFH_LEN_BYTES - skb_headroom(skb), 0);
|
|
needed_tailroom = max_t(int, ETH_FCS_LEN - skb_tailroom(skb), 0);
|
|
if (needed_headroom || needed_tailroom || skb_header_cloned(skb)) {
|
|
err = pskb_expand_head(skb, needed_headroom, needed_tailroom,
|
|
GFP_ATOMIC);
|
|
if (unlikely(err)) {
|
|
dev->stats.tx_dropped++;
|
|
err = NETDEV_TX_OK;
|
|
goto release;
|
|
}
|
|
}
|
|
|
|
skb_tx_timestamp(skb);
|
|
skb_push(skb, IFH_LEN_BYTES);
|
|
memcpy(skb->data, ifh, IFH_LEN_BYTES);
|
|
skb_put(skb, 4);
|
|
|
|
dma_addr = dma_map_single(lan966x->dev, skb->data, skb->len,
|
|
DMA_TO_DEVICE);
|
|
if (dma_mapping_error(lan966x->dev, dma_addr)) {
|
|
dev->stats.tx_dropped++;
|
|
err = NETDEV_TX_OK;
|
|
goto release;
|
|
}
|
|
|
|
/* Fill up the buffer */
|
|
next_dcb_buf = &tx->dcbs_buf[next_to_use];
|
|
next_dcb_buf->use_skb = true;
|
|
next_dcb_buf->data.skb = skb;
|
|
next_dcb_buf->xdp_ndo = false;
|
|
next_dcb_buf->len = skb->len;
|
|
next_dcb_buf->dma_addr = dma_addr;
|
|
next_dcb_buf->used = true;
|
|
next_dcb_buf->ptp = false;
|
|
next_dcb_buf->dev = dev;
|
|
|
|
fdma_dcb_add(&tx->fdma,
|
|
next_to_use,
|
|
0,
|
|
FDMA_DCB_STATUS_INTR |
|
|
FDMA_DCB_STATUS_SOF |
|
|
FDMA_DCB_STATUS_EOF |
|
|
FDMA_DCB_STATUS_BLOCKO(0) |
|
|
FDMA_DCB_STATUS_BLOCKL(skb->len));
|
|
|
|
if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP &&
|
|
LAN966X_SKB_CB(skb)->rew_op == IFH_REW_OP_TWO_STEP_PTP)
|
|
next_dcb_buf->ptp = true;
|
|
|
|
/* Start the transmission */
|
|
lan966x_fdma_tx_start(tx);
|
|
|
|
return NETDEV_TX_OK;
|
|
|
|
release:
|
|
if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP &&
|
|
LAN966X_SKB_CB(skb)->rew_op == IFH_REW_OP_TWO_STEP_PTP)
|
|
lan966x_ptp_txtstamp_release(port, skb);
|
|
|
|
dev_kfree_skb_any(skb);
|
|
return err;
|
|
}
|
|
|
|
static int lan966x_fdma_get_max_mtu(struct lan966x *lan966x)
|
|
{
|
|
int max_mtu = 0;
|
|
int i;
|
|
|
|
for (i = 0; i < lan966x->num_phys_ports; ++i) {
|
|
struct lan966x_port *port;
|
|
int mtu;
|
|
|
|
port = lan966x->ports[i];
|
|
if (!port)
|
|
continue;
|
|
|
|
mtu = lan_rd(lan966x, DEV_MAC_MAXLEN_CFG(port->chip_port));
|
|
if (mtu > max_mtu)
|
|
max_mtu = mtu;
|
|
}
|
|
|
|
return max_mtu;
|
|
}
|
|
|
|
static int lan966x_qsys_sw_status(struct lan966x *lan966x)
|
|
{
|
|
return lan_rd(lan966x, QSYS_SW_STATUS(CPU_PORT));
|
|
}
|
|
|
|
static int lan966x_fdma_reload(struct lan966x *lan966x, int new_mtu)
|
|
{
|
|
struct page_pool *page_pool;
|
|
struct fdma fdma_rx_old;
|
|
int err;
|
|
|
|
/* Store these for later to free them */
|
|
memcpy(&fdma_rx_old, &lan966x->rx.fdma, sizeof(struct fdma));
|
|
page_pool = lan966x->rx.page_pool;
|
|
|
|
napi_synchronize(&lan966x->napi);
|
|
napi_disable(&lan966x->napi);
|
|
lan966x_fdma_stop_netdev(lan966x);
|
|
|
|
lan966x_fdma_rx_disable(&lan966x->rx);
|
|
lan966x_fdma_rx_free_pages(&lan966x->rx);
|
|
lan966x->rx.page_order = round_up(new_mtu, PAGE_SIZE) / PAGE_SIZE - 1;
|
|
lan966x->rx.max_mtu = new_mtu;
|
|
err = lan966x_fdma_rx_alloc(&lan966x->rx);
|
|
if (err)
|
|
goto restore;
|
|
lan966x_fdma_rx_start(&lan966x->rx);
|
|
|
|
fdma_free_coherent(lan966x->dev, &fdma_rx_old);
|
|
|
|
page_pool_destroy(page_pool);
|
|
|
|
lan966x_fdma_wakeup_netdev(lan966x);
|
|
napi_enable(&lan966x->napi);
|
|
|
|
return err;
|
|
restore:
|
|
lan966x->rx.page_pool = page_pool;
|
|
memcpy(&lan966x->rx.fdma, &fdma_rx_old, sizeof(struct fdma));
|
|
lan966x_fdma_rx_start(&lan966x->rx);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int lan966x_fdma_get_max_frame(struct lan966x *lan966x)
|
|
{
|
|
return lan966x_fdma_get_max_mtu(lan966x) +
|
|
IFH_LEN_BYTES +
|
|
SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) +
|
|
VLAN_HLEN * 2 +
|
|
XDP_PACKET_HEADROOM;
|
|
}
|
|
|
|
static int __lan966x_fdma_reload(struct lan966x *lan966x, int max_mtu)
|
|
{
|
|
int err;
|
|
u32 val;
|
|
|
|
/* Disable the CPU port */
|
|
lan_rmw(QSYS_SW_PORT_MODE_PORT_ENA_SET(0),
|
|
QSYS_SW_PORT_MODE_PORT_ENA,
|
|
lan966x, QSYS_SW_PORT_MODE(CPU_PORT));
|
|
|
|
/* Flush the CPU queues */
|
|
readx_poll_timeout(lan966x_qsys_sw_status, lan966x,
|
|
val, !(QSYS_SW_STATUS_EQ_AVAIL_GET(val)),
|
|
READL_SLEEP_US, READL_TIMEOUT_US);
|
|
|
|
/* Add a sleep in case there are frames between the queues and the CPU
|
|
* port
|
|
*/
|
|
usleep_range(1000, 2000);
|
|
|
|
err = lan966x_fdma_reload(lan966x, max_mtu);
|
|
|
|
/* Enable back the CPU port */
|
|
lan_rmw(QSYS_SW_PORT_MODE_PORT_ENA_SET(1),
|
|
QSYS_SW_PORT_MODE_PORT_ENA,
|
|
lan966x, QSYS_SW_PORT_MODE(CPU_PORT));
|
|
|
|
return err;
|
|
}
|
|
|
|
int lan966x_fdma_change_mtu(struct lan966x *lan966x)
|
|
{
|
|
int max_mtu;
|
|
|
|
max_mtu = lan966x_fdma_get_max_frame(lan966x);
|
|
if (max_mtu == lan966x->rx.max_mtu)
|
|
return 0;
|
|
|
|
return __lan966x_fdma_reload(lan966x, max_mtu);
|
|
}
|
|
|
|
int lan966x_fdma_reload_page_pool(struct lan966x *lan966x)
|
|
{
|
|
int max_mtu;
|
|
|
|
max_mtu = lan966x_fdma_get_max_frame(lan966x);
|
|
return __lan966x_fdma_reload(lan966x, max_mtu);
|
|
}
|
|
|
|
void lan966x_fdma_netdev_init(struct lan966x *lan966x, struct net_device *dev)
|
|
{
|
|
if (lan966x->fdma_ndev)
|
|
return;
|
|
|
|
lan966x->fdma_ndev = dev;
|
|
netif_napi_add(dev, &lan966x->napi, lan966x_fdma_napi_poll);
|
|
napi_enable(&lan966x->napi);
|
|
}
|
|
|
|
void lan966x_fdma_netdev_deinit(struct lan966x *lan966x, struct net_device *dev)
|
|
{
|
|
if (lan966x->fdma_ndev == dev) {
|
|
netif_napi_del(&lan966x->napi);
|
|
lan966x->fdma_ndev = NULL;
|
|
}
|
|
}
|
|
|
|
int lan966x_fdma_init(struct lan966x *lan966x)
|
|
{
|
|
int err;
|
|
|
|
if (!lan966x->fdma)
|
|
return 0;
|
|
|
|
lan966x->rx.lan966x = lan966x;
|
|
lan966x->rx.fdma.channel_id = FDMA_XTR_CHANNEL;
|
|
lan966x->rx.fdma.n_dcbs = FDMA_DCB_MAX;
|
|
lan966x->rx.fdma.n_dbs = FDMA_RX_DCB_MAX_DBS;
|
|
lan966x->rx.fdma.priv = lan966x;
|
|
lan966x->rx.fdma.size = fdma_get_size(&lan966x->rx.fdma);
|
|
lan966x->rx.fdma.db_size = PAGE_SIZE << lan966x->rx.page_order;
|
|
lan966x->rx.fdma.ops.nextptr_cb = &fdma_nextptr_cb;
|
|
lan966x->rx.fdma.ops.dataptr_cb = &lan966x_fdma_rx_dataptr_cb;
|
|
lan966x->rx.max_mtu = lan966x_fdma_get_max_frame(lan966x);
|
|
lan966x->tx.lan966x = lan966x;
|
|
lan966x->tx.fdma.channel_id = FDMA_INJ_CHANNEL;
|
|
lan966x->tx.fdma.n_dcbs = FDMA_DCB_MAX;
|
|
lan966x->tx.fdma.n_dbs = FDMA_TX_DCB_MAX_DBS;
|
|
lan966x->tx.fdma.priv = lan966x;
|
|
lan966x->tx.fdma.size = fdma_get_size(&lan966x->tx.fdma);
|
|
lan966x->tx.fdma.db_size = PAGE_SIZE << lan966x->rx.page_order;
|
|
lan966x->tx.fdma.ops.nextptr_cb = &fdma_nextptr_cb;
|
|
lan966x->tx.fdma.ops.dataptr_cb = &lan966x_fdma_tx_dataptr_cb;
|
|
|
|
err = lan966x_fdma_rx_alloc(&lan966x->rx);
|
|
if (err)
|
|
return err;
|
|
|
|
err = lan966x_fdma_tx_alloc(&lan966x->tx);
|
|
if (err) {
|
|
fdma_free_coherent(lan966x->dev, &lan966x->rx.fdma);
|
|
return err;
|
|
}
|
|
|
|
lan966x_fdma_rx_start(&lan966x->rx);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void lan966x_fdma_deinit(struct lan966x *lan966x)
|
|
{
|
|
if (!lan966x->fdma)
|
|
return;
|
|
|
|
lan966x_fdma_rx_disable(&lan966x->rx);
|
|
lan966x_fdma_tx_disable(&lan966x->tx);
|
|
|
|
napi_synchronize(&lan966x->napi);
|
|
napi_disable(&lan966x->napi);
|
|
|
|
lan966x_fdma_rx_free_pages(&lan966x->rx);
|
|
fdma_free_coherent(lan966x->dev, &lan966x->rx.fdma);
|
|
page_pool_destroy(lan966x->rx.page_pool);
|
|
lan966x_fdma_tx_free(&lan966x->tx);
|
|
}
|