// SPDX-License-Identifier: GPL-2.0 /* Texas Instruments ICSSG Ethernet Driver * * Copyright (C) 2018-2022 Texas Instruments Incorporated - https://www.ti.com/ * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "icssg_prueth.h" #include "icssg_mii_rt.h" #include "../k3-cppi-desc-pool.h" #define PRUETH_MODULE_DESCRIPTION "PRUSS ICSSG Ethernet driver" /* Netif debug messages possible */ #define PRUETH_EMAC_DEBUG (NETIF_MSG_DRV | \ NETIF_MSG_PROBE | \ NETIF_MSG_LINK | \ NETIF_MSG_TIMER | \ NETIF_MSG_IFDOWN | \ NETIF_MSG_IFUP | \ NETIF_MSG_RX_ERR | \ NETIF_MSG_TX_ERR | \ NETIF_MSG_TX_QUEUED | \ NETIF_MSG_INTR | \ NETIF_MSG_TX_DONE | \ NETIF_MSG_RX_STATUS | \ NETIF_MSG_PKTDATA | \ NETIF_MSG_HW | \ NETIF_MSG_WOL) #define prueth_napi_to_emac(napi) container_of(napi, struct prueth_emac, napi_rx) /* CTRLMMR_ICSSG_RGMII_CTRL register bits */ #define ICSSG_CTRL_RGMII_ID_MODE BIT(24) #define IEP_DEFAULT_CYCLE_TIME_NS 1000000 /* 1 ms */ static void prueth_cleanup_rx_chns(struct prueth_emac *emac, struct prueth_rx_chn *rx_chn, int max_rflows) { if (rx_chn->desc_pool) k3_cppi_desc_pool_destroy(rx_chn->desc_pool); if (rx_chn->rx_chn) k3_udma_glue_release_rx_chn(rx_chn->rx_chn); } static void prueth_cleanup_tx_chns(struct prueth_emac *emac) { int i; for (i = 0; i < emac->tx_ch_num; i++) { struct prueth_tx_chn *tx_chn = &emac->tx_chns[i]; if (tx_chn->desc_pool) k3_cppi_desc_pool_destroy(tx_chn->desc_pool); if (tx_chn->tx_chn) k3_udma_glue_release_tx_chn(tx_chn->tx_chn); /* Assume prueth_cleanup_tx_chns() is called at the * end after all channel resources are freed */ memset(tx_chn, 0, sizeof(*tx_chn)); } } static void prueth_ndev_del_tx_napi(struct prueth_emac *emac, int num) { int i; for (i = 0; i < num; i++) { struct prueth_tx_chn *tx_chn = &emac->tx_chns[i]; if (tx_chn->irq) free_irq(tx_chn->irq, tx_chn); netif_napi_del(&tx_chn->napi_tx); } } static void prueth_xmit_free(struct prueth_tx_chn *tx_chn, struct cppi5_host_desc_t *desc) { struct cppi5_host_desc_t *first_desc, *next_desc; dma_addr_t buf_dma, next_desc_dma; u32 buf_dma_len; first_desc = desc; next_desc = first_desc; cppi5_hdesc_get_obuf(first_desc, &buf_dma, &buf_dma_len); k3_udma_glue_tx_cppi5_to_dma_addr(tx_chn->tx_chn, &buf_dma); dma_unmap_single(tx_chn->dma_dev, buf_dma, buf_dma_len, DMA_TO_DEVICE); next_desc_dma = cppi5_hdesc_get_next_hbdesc(first_desc); k3_udma_glue_tx_cppi5_to_dma_addr(tx_chn->tx_chn, &next_desc_dma); while (next_desc_dma) { next_desc = k3_cppi_desc_pool_dma2virt(tx_chn->desc_pool, next_desc_dma); cppi5_hdesc_get_obuf(next_desc, &buf_dma, &buf_dma_len); k3_udma_glue_tx_cppi5_to_dma_addr(tx_chn->tx_chn, &buf_dma); dma_unmap_page(tx_chn->dma_dev, buf_dma, buf_dma_len, DMA_TO_DEVICE); next_desc_dma = cppi5_hdesc_get_next_hbdesc(next_desc); k3_udma_glue_tx_cppi5_to_dma_addr(tx_chn->tx_chn, &next_desc_dma); k3_cppi_desc_pool_free(tx_chn->desc_pool, next_desc); } k3_cppi_desc_pool_free(tx_chn->desc_pool, first_desc); } static int emac_tx_complete_packets(struct prueth_emac *emac, int chn, int budget) { struct net_device *ndev = emac->ndev; struct cppi5_host_desc_t *desc_tx; struct netdev_queue *netif_txq; struct prueth_tx_chn *tx_chn; unsigned int total_bytes = 0; struct sk_buff *skb; dma_addr_t desc_dma; int res, num_tx = 0; void **swdata; tx_chn = &emac->tx_chns[chn]; while (true) { res = k3_udma_glue_pop_tx_chn(tx_chn->tx_chn, &desc_dma); if (res == -ENODATA) break; /* teardown completion */ if (cppi5_desc_is_tdcm(desc_dma)) { if (atomic_dec_and_test(&emac->tdown_cnt)) complete(&emac->tdown_complete); break; } desc_tx = k3_cppi_desc_pool_dma2virt(tx_chn->desc_pool, desc_dma); swdata = cppi5_hdesc_get_swdata(desc_tx); skb = *(swdata); prueth_xmit_free(tx_chn, desc_tx); ndev = skb->dev; ndev->stats.tx_packets++; ndev->stats.tx_bytes += skb->len; total_bytes += skb->len; napi_consume_skb(skb, budget); num_tx++; } if (!num_tx) return 0; netif_txq = netdev_get_tx_queue(ndev, chn); netdev_tx_completed_queue(netif_txq, num_tx, total_bytes); if (netif_tx_queue_stopped(netif_txq)) { /* If the TX queue was stopped, wake it now * if we have enough room. */ __netif_tx_lock(netif_txq, smp_processor_id()); if (netif_running(ndev) && (k3_cppi_desc_pool_avail(tx_chn->desc_pool) >= MAX_SKB_FRAGS)) netif_tx_wake_queue(netif_txq); __netif_tx_unlock(netif_txq); } return num_tx; } static int emac_napi_tx_poll(struct napi_struct *napi_tx, int budget) { struct prueth_tx_chn *tx_chn = prueth_napi_to_tx_chn(napi_tx); struct prueth_emac *emac = tx_chn->emac; int num_tx_packets; num_tx_packets = emac_tx_complete_packets(emac, tx_chn->id, budget); if (num_tx_packets >= budget) return budget; if (napi_complete_done(napi_tx, num_tx_packets)) enable_irq(tx_chn->irq); return num_tx_packets; } static irqreturn_t prueth_tx_irq(int irq, void *dev_id) { struct prueth_tx_chn *tx_chn = dev_id; disable_irq_nosync(irq); napi_schedule(&tx_chn->napi_tx); return IRQ_HANDLED; } static int prueth_ndev_add_tx_napi(struct prueth_emac *emac) { struct prueth *prueth = emac->prueth; int i, ret; for (i = 0; i < emac->tx_ch_num; i++) { struct prueth_tx_chn *tx_chn = &emac->tx_chns[i]; netif_napi_add_tx(emac->ndev, &tx_chn->napi_tx, emac_napi_tx_poll); ret = request_irq(tx_chn->irq, prueth_tx_irq, IRQF_TRIGGER_HIGH, tx_chn->name, tx_chn); if (ret) { netif_napi_del(&tx_chn->napi_tx); dev_err(prueth->dev, "unable to request TX IRQ %d\n", tx_chn->irq); goto fail; } } return 0; fail: prueth_ndev_del_tx_napi(emac, i); return ret; } static int prueth_init_tx_chns(struct prueth_emac *emac) { static const struct k3_ring_cfg ring_cfg = { .elm_size = K3_RINGACC_RING_ELSIZE_8, .mode = K3_RINGACC_RING_MODE_RING, .flags = 0, .size = PRUETH_MAX_TX_DESC, }; struct k3_udma_glue_tx_channel_cfg tx_cfg; struct device *dev = emac->prueth->dev; struct net_device *ndev = emac->ndev; int ret, slice, i; u32 hdesc_size; slice = prueth_emac_slice(emac); if (slice < 0) return slice; init_completion(&emac->tdown_complete); hdesc_size = cppi5_hdesc_calc_size(true, PRUETH_NAV_PS_DATA_SIZE, PRUETH_NAV_SW_DATA_SIZE); memset(&tx_cfg, 0, sizeof(tx_cfg)); tx_cfg.swdata_size = PRUETH_NAV_SW_DATA_SIZE; tx_cfg.tx_cfg = ring_cfg; tx_cfg.txcq_cfg = ring_cfg; for (i = 0; i < emac->tx_ch_num; i++) { struct prueth_tx_chn *tx_chn = &emac->tx_chns[i]; /* To differentiate channels for SLICE0 vs SLICE1 */ snprintf(tx_chn->name, sizeof(tx_chn->name), "tx%d-%d", slice, i); tx_chn->emac = emac; tx_chn->id = i; tx_chn->descs_num = PRUETH_MAX_TX_DESC; tx_chn->tx_chn = k3_udma_glue_request_tx_chn(dev, tx_chn->name, &tx_cfg); if (IS_ERR(tx_chn->tx_chn)) { ret = PTR_ERR(tx_chn->tx_chn); tx_chn->tx_chn = NULL; netdev_err(ndev, "Failed to request tx dma ch: %d\n", ret); goto fail; } tx_chn->dma_dev = k3_udma_glue_tx_get_dma_device(tx_chn->tx_chn); tx_chn->desc_pool = k3_cppi_desc_pool_create_name(tx_chn->dma_dev, tx_chn->descs_num, hdesc_size, tx_chn->name); if (IS_ERR(tx_chn->desc_pool)) { ret = PTR_ERR(tx_chn->desc_pool); tx_chn->desc_pool = NULL; netdev_err(ndev, "Failed to create tx pool: %d\n", ret); goto fail; } ret = k3_udma_glue_tx_get_irq(tx_chn->tx_chn); if (ret < 0) { netdev_err(ndev, "failed to get tx irq\n"); goto fail; } tx_chn->irq = ret; snprintf(tx_chn->name, sizeof(tx_chn->name), "%s-tx%d", dev_name(dev), tx_chn->id); } return 0; fail: prueth_cleanup_tx_chns(emac); return ret; } static int prueth_init_rx_chns(struct prueth_emac *emac, struct prueth_rx_chn *rx_chn, char *name, u32 max_rflows, u32 max_desc_num) { struct k3_udma_glue_rx_channel_cfg rx_cfg; struct device *dev = emac->prueth->dev; struct net_device *ndev = emac->ndev; u32 fdqring_id, hdesc_size; int i, ret = 0, slice; slice = prueth_emac_slice(emac); if (slice < 0) return slice; /* To differentiate channels for SLICE0 vs SLICE1 */ snprintf(rx_chn->name, sizeof(rx_chn->name), "%s%d", name, slice); hdesc_size = cppi5_hdesc_calc_size(true, PRUETH_NAV_PS_DATA_SIZE, PRUETH_NAV_SW_DATA_SIZE); memset(&rx_cfg, 0, sizeof(rx_cfg)); rx_cfg.swdata_size = PRUETH_NAV_SW_DATA_SIZE; rx_cfg.flow_id_num = max_rflows; rx_cfg.flow_id_base = -1; /* udmax will auto select flow id base */ /* init all flows */ rx_chn->dev = dev; rx_chn->descs_num = max_desc_num; rx_chn->rx_chn = k3_udma_glue_request_rx_chn(dev, rx_chn->name, &rx_cfg); if (IS_ERR(rx_chn->rx_chn)) { ret = PTR_ERR(rx_chn->rx_chn); rx_chn->rx_chn = NULL; netdev_err(ndev, "Failed to request rx dma ch: %d\n", ret); goto fail; } rx_chn->dma_dev = k3_udma_glue_rx_get_dma_device(rx_chn->rx_chn); rx_chn->desc_pool = k3_cppi_desc_pool_create_name(rx_chn->dma_dev, rx_chn->descs_num, hdesc_size, rx_chn->name); if (IS_ERR(rx_chn->desc_pool)) { ret = PTR_ERR(rx_chn->desc_pool); rx_chn->desc_pool = NULL; netdev_err(ndev, "Failed to create rx pool: %d\n", ret); goto fail; } emac->rx_flow_id_base = k3_udma_glue_rx_get_flow_id_base(rx_chn->rx_chn); netdev_dbg(ndev, "flow id base = %d\n", emac->rx_flow_id_base); fdqring_id = K3_RINGACC_RING_ID_ANY; for (i = 0; i < rx_cfg.flow_id_num; i++) { struct k3_ring_cfg rxring_cfg = { .elm_size = K3_RINGACC_RING_ELSIZE_8, .mode = K3_RINGACC_RING_MODE_RING, .flags = 0, }; struct k3_ring_cfg fdqring_cfg = { .elm_size = K3_RINGACC_RING_ELSIZE_8, .flags = K3_RINGACC_RING_SHARED, }; struct k3_udma_glue_rx_flow_cfg rx_flow_cfg = { .rx_cfg = rxring_cfg, .rxfdq_cfg = fdqring_cfg, .ring_rxq_id = K3_RINGACC_RING_ID_ANY, .src_tag_lo_sel = K3_UDMA_GLUE_SRC_TAG_LO_USE_REMOTE_SRC_TAG, }; rx_flow_cfg.ring_rxfdq0_id = fdqring_id; rx_flow_cfg.rx_cfg.size = max_desc_num; rx_flow_cfg.rxfdq_cfg.size = max_desc_num; rx_flow_cfg.rxfdq_cfg.mode = emac->prueth->pdata.fdqring_mode; ret = k3_udma_glue_rx_flow_init(rx_chn->rx_chn, i, &rx_flow_cfg); if (ret) { netdev_err(ndev, "Failed to init rx flow%d %d\n", i, ret); goto fail; } if (!i) fdqring_id = k3_udma_glue_rx_flow_get_fdq_id(rx_chn->rx_chn, i); ret = k3_udma_glue_rx_get_irq(rx_chn->rx_chn, i); if (ret <= 0) { if (!ret) ret = -ENXIO; netdev_err(ndev, "Failed to get rx dma irq"); goto fail; } rx_chn->irq[i] = ret; } return 0; fail: prueth_cleanup_rx_chns(emac, rx_chn, max_rflows); return ret; } static int prueth_dma_rx_push(struct prueth_emac *emac, struct sk_buff *skb, struct prueth_rx_chn *rx_chn) { struct net_device *ndev = emac->ndev; struct cppi5_host_desc_t *desc_rx; u32 pkt_len = skb_tailroom(skb); dma_addr_t desc_dma; dma_addr_t buf_dma; void **swdata; desc_rx = k3_cppi_desc_pool_alloc(rx_chn->desc_pool); if (!desc_rx) { netdev_err(ndev, "rx push: failed to allocate descriptor\n"); return -ENOMEM; } desc_dma = k3_cppi_desc_pool_virt2dma(rx_chn->desc_pool, desc_rx); buf_dma = dma_map_single(rx_chn->dma_dev, skb->data, pkt_len, DMA_FROM_DEVICE); if (unlikely(dma_mapping_error(rx_chn->dma_dev, buf_dma))) { k3_cppi_desc_pool_free(rx_chn->desc_pool, desc_rx); netdev_err(ndev, "rx push: failed to map rx pkt buffer\n"); return -EINVAL; } cppi5_hdesc_init(desc_rx, CPPI5_INFO0_HDESC_EPIB_PRESENT, PRUETH_NAV_PS_DATA_SIZE); k3_udma_glue_rx_dma_to_cppi5_addr(rx_chn->rx_chn, &buf_dma); cppi5_hdesc_attach_buf(desc_rx, buf_dma, skb_tailroom(skb), buf_dma, skb_tailroom(skb)); swdata = cppi5_hdesc_get_swdata(desc_rx); *swdata = skb; return k3_udma_glue_push_rx_chn(rx_chn->rx_chn, 0, desc_rx, desc_dma); } static u64 icssg_ts_to_ns(u32 hi_sw, u32 hi, u32 lo, u32 cycle_time_ns) { u32 iepcount_lo, iepcount_hi, hi_rollover_count; u64 ns; iepcount_lo = lo & GENMASK(19, 0); iepcount_hi = (hi & GENMASK(11, 0)) << 12 | lo >> 20; hi_rollover_count = hi >> 11; ns = ((u64)hi_rollover_count) << 23 | (iepcount_hi + hi_sw); ns = ns * cycle_time_ns + iepcount_lo; return ns; } static void emac_rx_timestamp(struct prueth_emac *emac, struct sk_buff *skb, u32 *psdata) { struct skb_shared_hwtstamps *ssh; u64 ns; u32 hi_sw = readl(emac->prueth->shram.va + TIMESYNC_FW_WC_COUNT_HI_SW_OFFSET_OFFSET); ns = icssg_ts_to_ns(hi_sw, psdata[1], psdata[0], IEP_DEFAULT_CYCLE_TIME_NS); ssh = skb_hwtstamps(skb); memset(ssh, 0, sizeof(*ssh)); ssh->hwtstamp = ns_to_ktime(ns); } static int emac_rx_packet(struct prueth_emac *emac, u32 flow_id) { struct prueth_rx_chn *rx_chn = &emac->rx_chns; u32 buf_dma_len, pkt_len, port_id = 0; struct net_device *ndev = emac->ndev; struct cppi5_host_desc_t *desc_rx; struct sk_buff *skb, *new_skb; dma_addr_t desc_dma, buf_dma; void **swdata; u32 *psdata; int ret; ret = k3_udma_glue_pop_rx_chn(rx_chn->rx_chn, flow_id, &desc_dma); if (ret) { if (ret != -ENODATA) netdev_err(ndev, "rx pop: failed: %d\n", ret); return ret; } if (cppi5_desc_is_tdcm(desc_dma)) /* Teardown ? */ return 0; desc_rx = k3_cppi_desc_pool_dma2virt(rx_chn->desc_pool, desc_dma); swdata = cppi5_hdesc_get_swdata(desc_rx); skb = *swdata; psdata = cppi5_hdesc_get_psdata(desc_rx); /* RX HW timestamp */ if (emac->rx_ts_enabled) emac_rx_timestamp(emac, skb, psdata); cppi5_hdesc_get_obuf(desc_rx, &buf_dma, &buf_dma_len); k3_udma_glue_rx_cppi5_to_dma_addr(rx_chn->rx_chn, &buf_dma); pkt_len = cppi5_hdesc_get_pktlen(desc_rx); /* firmware adds 4 CRC bytes, strip them */ pkt_len -= 4; cppi5_desc_get_tags_ids(&desc_rx->hdr, &port_id, NULL); dma_unmap_single(rx_chn->dma_dev, buf_dma, buf_dma_len, DMA_FROM_DEVICE); k3_cppi_desc_pool_free(rx_chn->desc_pool, desc_rx); skb->dev = ndev; new_skb = netdev_alloc_skb_ip_align(ndev, PRUETH_MAX_PKT_SIZE); /* if allocation fails we drop the packet but push the * descriptor back to the ring with old skb to prevent a stall */ if (!new_skb) { ndev->stats.rx_dropped++; new_skb = skb; } else { /* send the filled skb up the n/w stack */ skb_put(skb, pkt_len); skb->protocol = eth_type_trans(skb, ndev); napi_gro_receive(&emac->napi_rx, skb); ndev->stats.rx_bytes += pkt_len; ndev->stats.rx_packets++; } /* queue another RX DMA */ ret = prueth_dma_rx_push(emac, new_skb, &emac->rx_chns); if (WARN_ON(ret < 0)) { dev_kfree_skb_any(new_skb); ndev->stats.rx_errors++; ndev->stats.rx_dropped++; } return ret; } static void prueth_rx_cleanup(void *data, dma_addr_t desc_dma) { struct prueth_rx_chn *rx_chn = data; struct cppi5_host_desc_t *desc_rx; struct sk_buff *skb; dma_addr_t buf_dma; u32 buf_dma_len; void **swdata; desc_rx = k3_cppi_desc_pool_dma2virt(rx_chn->desc_pool, desc_dma); swdata = cppi5_hdesc_get_swdata(desc_rx); skb = *swdata; cppi5_hdesc_get_obuf(desc_rx, &buf_dma, &buf_dma_len); k3_udma_glue_rx_cppi5_to_dma_addr(rx_chn->rx_chn, &buf_dma); dma_unmap_single(rx_chn->dma_dev, buf_dma, buf_dma_len, DMA_FROM_DEVICE); k3_cppi_desc_pool_free(rx_chn->desc_pool, desc_rx); dev_kfree_skb_any(skb); } static int emac_get_tx_ts(struct prueth_emac *emac, struct emac_tx_ts_response *rsp) { struct prueth *prueth = emac->prueth; int slice = prueth_emac_slice(emac); int addr; addr = icssg_queue_pop(prueth, slice == 0 ? ICSSG_TS_POP_SLICE0 : ICSSG_TS_POP_SLICE1); if (addr < 0) return addr; memcpy_fromio(rsp, prueth->shram.va + addr, sizeof(*rsp)); /* return buffer back for to pool */ icssg_queue_push(prueth, slice == 0 ? ICSSG_TS_PUSH_SLICE0 : ICSSG_TS_PUSH_SLICE1, addr); return 0; } static void tx_ts_work(struct prueth_emac *emac) { struct skb_shared_hwtstamps ssh; struct emac_tx_ts_response tsr; struct sk_buff *skb; int ret = 0; u32 hi_sw; u64 ns; /* There may be more than one pending requests */ while (1) { ret = emac_get_tx_ts(emac, &tsr); if (ret) /* nothing more */ break; if (tsr.cookie >= PRUETH_MAX_TX_TS_REQUESTS || !emac->tx_ts_skb[tsr.cookie]) { netdev_err(emac->ndev, "Invalid TX TS cookie 0x%x\n", tsr.cookie); break; } skb = emac->tx_ts_skb[tsr.cookie]; emac->tx_ts_skb[tsr.cookie] = NULL; /* free slot */ if (!skb) { netdev_err(emac->ndev, "Driver Bug! got NULL skb\n"); break; } hi_sw = readl(emac->prueth->shram.va + TIMESYNC_FW_WC_COUNT_HI_SW_OFFSET_OFFSET); ns = icssg_ts_to_ns(hi_sw, tsr.hi_ts, tsr.lo_ts, IEP_DEFAULT_CYCLE_TIME_NS); memset(&ssh, 0, sizeof(ssh)); ssh.hwtstamp = ns_to_ktime(ns); skb_tstamp_tx(skb, &ssh); dev_consume_skb_any(skb); if (atomic_dec_and_test(&emac->tx_ts_pending)) /* no more? */ break; } } static int prueth_tx_ts_cookie_get(struct prueth_emac *emac) { int i; /* search and get the next free slot */ for (i = 0; i < PRUETH_MAX_TX_TS_REQUESTS; i++) { if (!emac->tx_ts_skb[i]) { emac->tx_ts_skb[i] = ERR_PTR(-EBUSY); /* reserve slot */ return i; } } return -EBUSY; } /** * emac_ndo_start_xmit - EMAC Transmit function * @skb: SKB pointer * @ndev: EMAC network adapter * * Called by the system to transmit a packet - we queue the packet in * EMAC hardware transmit queue * Doesn't wait for completion we'll check for TX completion in * emac_tx_complete_packets(). * * Return: enum netdev_tx */ static enum netdev_tx emac_ndo_start_xmit(struct sk_buff *skb, struct net_device *ndev) { struct cppi5_host_desc_t *first_desc, *next_desc, *cur_desc; struct prueth_emac *emac = netdev_priv(ndev); struct netdev_queue *netif_txq; struct prueth_tx_chn *tx_chn; dma_addr_t desc_dma, buf_dma; int i, ret = 0, q_idx; bool in_tx_ts = 0; int tx_ts_cookie; void **swdata; u32 pkt_len; u32 *epib; pkt_len = skb_headlen(skb); q_idx = skb_get_queue_mapping(skb); tx_chn = &emac->tx_chns[q_idx]; netif_txq = netdev_get_tx_queue(ndev, q_idx); /* Map the linear buffer */ buf_dma = dma_map_single(tx_chn->dma_dev, skb->data, pkt_len, DMA_TO_DEVICE); if (dma_mapping_error(tx_chn->dma_dev, buf_dma)) { netdev_err(ndev, "tx: failed to map skb buffer\n"); ret = NETDEV_TX_OK; goto drop_free_skb; } first_desc = k3_cppi_desc_pool_alloc(tx_chn->desc_pool); if (!first_desc) { netdev_dbg(ndev, "tx: failed to allocate descriptor\n"); dma_unmap_single(tx_chn->dma_dev, buf_dma, pkt_len, DMA_TO_DEVICE); goto drop_stop_q_busy; } cppi5_hdesc_init(first_desc, CPPI5_INFO0_HDESC_EPIB_PRESENT, PRUETH_NAV_PS_DATA_SIZE); cppi5_hdesc_set_pkttype(first_desc, 0); epib = first_desc->epib; epib[0] = 0; epib[1] = 0; if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP && emac->tx_ts_enabled) { tx_ts_cookie = prueth_tx_ts_cookie_get(emac); if (tx_ts_cookie >= 0) { skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; /* Request TX timestamp */ epib[0] = (u32)tx_ts_cookie; epib[1] = 0x80000000; /* TX TS request */ emac->tx_ts_skb[tx_ts_cookie] = skb_get(skb); in_tx_ts = 1; } } /* set dst tag to indicate internal qid at the firmware which is at * bit8..bit15. bit0..bit7 indicates port num for directed * packets in case of switch mode operation */ cppi5_desc_set_tags_ids(&first_desc->hdr, 0, (emac->port_id | (q_idx << 8))); k3_udma_glue_tx_dma_to_cppi5_addr(tx_chn->tx_chn, &buf_dma); cppi5_hdesc_attach_buf(first_desc, buf_dma, pkt_len, buf_dma, pkt_len); swdata = cppi5_hdesc_get_swdata(first_desc); *swdata = skb; /* Handle the case where skb is fragmented in pages */ cur_desc = first_desc; for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; u32 frag_size = skb_frag_size(frag); next_desc = k3_cppi_desc_pool_alloc(tx_chn->desc_pool); if (!next_desc) { netdev_err(ndev, "tx: failed to allocate frag. descriptor\n"); goto free_desc_stop_q_busy_cleanup_tx_ts; } buf_dma = skb_frag_dma_map(tx_chn->dma_dev, frag, 0, frag_size, DMA_TO_DEVICE); if (dma_mapping_error(tx_chn->dma_dev, buf_dma)) { netdev_err(ndev, "tx: Failed to map skb page\n"); k3_cppi_desc_pool_free(tx_chn->desc_pool, next_desc); ret = NETDEV_TX_OK; goto cleanup_tx_ts; } cppi5_hdesc_reset_hbdesc(next_desc); k3_udma_glue_tx_dma_to_cppi5_addr(tx_chn->tx_chn, &buf_dma); cppi5_hdesc_attach_buf(next_desc, buf_dma, frag_size, buf_dma, frag_size); desc_dma = k3_cppi_desc_pool_virt2dma(tx_chn->desc_pool, next_desc); k3_udma_glue_tx_dma_to_cppi5_addr(tx_chn->tx_chn, &desc_dma); cppi5_hdesc_link_hbdesc(cur_desc, desc_dma); pkt_len += frag_size; cur_desc = next_desc; } WARN_ON_ONCE(pkt_len != skb->len); /* report bql before sending packet */ netdev_tx_sent_queue(netif_txq, pkt_len); cppi5_hdesc_set_pktlen(first_desc, pkt_len); desc_dma = k3_cppi_desc_pool_virt2dma(tx_chn->desc_pool, first_desc); /* cppi5_desc_dump(first_desc, 64); */ skb_tx_timestamp(skb); /* SW timestamp if SKBTX_IN_PROGRESS not set */ ret = k3_udma_glue_push_tx_chn(tx_chn->tx_chn, first_desc, desc_dma); if (ret) { netdev_err(ndev, "tx: push failed: %d\n", ret); goto drop_free_descs; } if (in_tx_ts) atomic_inc(&emac->tx_ts_pending); if (k3_cppi_desc_pool_avail(tx_chn->desc_pool) < MAX_SKB_FRAGS) { netif_tx_stop_queue(netif_txq); /* Barrier, so that stop_queue visible to other cpus */ smp_mb__after_atomic(); if (k3_cppi_desc_pool_avail(tx_chn->desc_pool) >= MAX_SKB_FRAGS) netif_tx_wake_queue(netif_txq); } return NETDEV_TX_OK; cleanup_tx_ts: if (in_tx_ts) { dev_kfree_skb_any(emac->tx_ts_skb[tx_ts_cookie]); emac->tx_ts_skb[tx_ts_cookie] = NULL; } drop_free_descs: prueth_xmit_free(tx_chn, first_desc); drop_free_skb: dev_kfree_skb_any(skb); /* error */ ndev->stats.tx_dropped++; netdev_err(ndev, "tx: error: %d\n", ret); return ret; free_desc_stop_q_busy_cleanup_tx_ts: if (in_tx_ts) { dev_kfree_skb_any(emac->tx_ts_skb[tx_ts_cookie]); emac->tx_ts_skb[tx_ts_cookie] = NULL; } prueth_xmit_free(tx_chn, first_desc); drop_stop_q_busy: netif_tx_stop_queue(netif_txq); return NETDEV_TX_BUSY; } static void prueth_tx_cleanup(void *data, dma_addr_t desc_dma) { struct prueth_tx_chn *tx_chn = data; struct cppi5_host_desc_t *desc_tx; struct sk_buff *skb; void **swdata; desc_tx = k3_cppi_desc_pool_dma2virt(tx_chn->desc_pool, desc_dma); swdata = cppi5_hdesc_get_swdata(desc_tx); skb = *(swdata); prueth_xmit_free(tx_chn, desc_tx); dev_kfree_skb_any(skb); } static irqreturn_t prueth_tx_ts_irq(int irq, void *dev_id) { struct prueth_emac *emac = dev_id; /* currently only TX timestamp is being returned */ tx_ts_work(emac); return IRQ_HANDLED; } static irqreturn_t prueth_rx_irq(int irq, void *dev_id) { struct prueth_emac *emac = dev_id; disable_irq_nosync(irq); napi_schedule(&emac->napi_rx); return IRQ_HANDLED; } struct icssg_firmwares { char *pru; char *rtu; char *txpru; }; static struct icssg_firmwares icssg_emac_firmwares[] = { { .pru = "ti-pruss/am65x-sr2-pru0-prueth-fw.elf", .rtu = "ti-pruss/am65x-sr2-rtu0-prueth-fw.elf", .txpru = "ti-pruss/am65x-sr2-txpru0-prueth-fw.elf", }, { .pru = "ti-pruss/am65x-sr2-pru1-prueth-fw.elf", .rtu = "ti-pruss/am65x-sr2-rtu1-prueth-fw.elf", .txpru = "ti-pruss/am65x-sr2-txpru1-prueth-fw.elf", } }; static int prueth_emac_start(struct prueth *prueth, struct prueth_emac *emac) { struct icssg_firmwares *firmwares; struct device *dev = prueth->dev; int slice, ret; firmwares = icssg_emac_firmwares; slice = prueth_emac_slice(emac); if (slice < 0) { netdev_err(emac->ndev, "invalid port\n"); return -EINVAL; } ret = icssg_config(prueth, emac, slice); if (ret) return ret; ret = rproc_set_firmware(prueth->pru[slice], firmwares[slice].pru); ret = rproc_boot(prueth->pru[slice]); if (ret) { dev_err(dev, "failed to boot PRU%d: %d\n", slice, ret); return -EINVAL; } ret = rproc_set_firmware(prueth->rtu[slice], firmwares[slice].rtu); ret = rproc_boot(prueth->rtu[slice]); if (ret) { dev_err(dev, "failed to boot RTU%d: %d\n", slice, ret); goto halt_pru; } ret = rproc_set_firmware(prueth->txpru[slice], firmwares[slice].txpru); ret = rproc_boot(prueth->txpru[slice]); if (ret) { dev_err(dev, "failed to boot TX_PRU%d: %d\n", slice, ret); goto halt_rtu; } emac->fw_running = 1; return 0; halt_rtu: rproc_shutdown(prueth->rtu[slice]); halt_pru: rproc_shutdown(prueth->pru[slice]); return ret; } static void prueth_emac_stop(struct prueth_emac *emac) { struct prueth *prueth = emac->prueth; int slice; switch (emac->port_id) { case PRUETH_PORT_MII0: slice = ICSS_SLICE0; break; case PRUETH_PORT_MII1: slice = ICSS_SLICE1; break; default: netdev_err(emac->ndev, "invalid port\n"); return; } emac->fw_running = 0; rproc_shutdown(prueth->txpru[slice]); rproc_shutdown(prueth->rtu[slice]); rproc_shutdown(prueth->pru[slice]); } static void prueth_cleanup_tx_ts(struct prueth_emac *emac) { int i; for (i = 0; i < PRUETH_MAX_TX_TS_REQUESTS; i++) { if (emac->tx_ts_skb[i]) { dev_kfree_skb_any(emac->tx_ts_skb[i]); emac->tx_ts_skb[i] = NULL; } } } /* called back by PHY layer if there is change in link state of hw port*/ static void emac_adjust_link(struct net_device *ndev) { struct prueth_emac *emac = netdev_priv(ndev); struct phy_device *phydev = ndev->phydev; struct prueth *prueth = emac->prueth; bool new_state = false; unsigned long flags; if (phydev->link) { /* check the mode of operation - full/half duplex */ if (phydev->duplex != emac->duplex) { new_state = true; emac->duplex = phydev->duplex; } if (phydev->speed != emac->speed) { new_state = true; emac->speed = phydev->speed; } if (!emac->link) { new_state = true; emac->link = 1; } } else if (emac->link) { new_state = true; emac->link = 0; /* f/w should support 100 & 1000 */ emac->speed = SPEED_1000; /* half duplex may not be supported by f/w */ emac->duplex = DUPLEX_FULL; } if (new_state) { phy_print_status(phydev); /* update RGMII and MII configuration based on PHY negotiated * values */ if (emac->link) { /* Set the RGMII cfg for gig en and full duplex */ icssg_update_rgmii_cfg(prueth->miig_rt, emac); /* update the Tx IPG based on 100M/1G speed */ spin_lock_irqsave(&emac->lock, flags); icssg_config_ipg(emac); spin_unlock_irqrestore(&emac->lock, flags); icssg_config_set_speed(emac); emac_set_port_state(emac, ICSSG_EMAC_PORT_FORWARD); } else { emac_set_port_state(emac, ICSSG_EMAC_PORT_DISABLE); } } if (emac->link) { /* reactivate the transmit queue */ netif_tx_wake_all_queues(ndev); } else { netif_tx_stop_all_queues(ndev); prueth_cleanup_tx_ts(emac); } } static int emac_napi_rx_poll(struct napi_struct *napi_rx, int budget) { struct prueth_emac *emac = prueth_napi_to_emac(napi_rx); int rx_flow = PRUETH_RX_FLOW_DATA; int flow = PRUETH_MAX_RX_FLOWS; int num_rx = 0; int cur_budget; int ret; while (flow--) { cur_budget = budget - num_rx; while (cur_budget--) { ret = emac_rx_packet(emac, flow); if (ret) break; num_rx++; } if (num_rx >= budget) break; } if (num_rx < budget && napi_complete_done(napi_rx, num_rx)) enable_irq(emac->rx_chns.irq[rx_flow]); return num_rx; } static int prueth_prepare_rx_chan(struct prueth_emac *emac, struct prueth_rx_chn *chn, int buf_size) { struct sk_buff *skb; int i, ret; for (i = 0; i < chn->descs_num; i++) { skb = __netdev_alloc_skb_ip_align(NULL, buf_size, GFP_KERNEL); if (!skb) return -ENOMEM; ret = prueth_dma_rx_push(emac, skb, chn); if (ret < 0) { netdev_err(emac->ndev, "cannot submit skb for rx chan %s ret %d\n", chn->name, ret); kfree_skb(skb); return ret; } } return 0; } static void prueth_reset_tx_chan(struct prueth_emac *emac, int ch_num, bool free_skb) { int i; for (i = 0; i < ch_num; i++) { if (free_skb) k3_udma_glue_reset_tx_chn(emac->tx_chns[i].tx_chn, &emac->tx_chns[i], prueth_tx_cleanup); k3_udma_glue_disable_tx_chn(emac->tx_chns[i].tx_chn); } } static void prueth_reset_rx_chan(struct prueth_rx_chn *chn, int num_flows, bool disable) { int i; for (i = 0; i < num_flows; i++) k3_udma_glue_reset_rx_chn(chn->rx_chn, i, chn, prueth_rx_cleanup, !!i); if (disable) k3_udma_glue_disable_rx_chn(chn->rx_chn); } static int emac_phy_connect(struct prueth_emac *emac) { struct prueth *prueth = emac->prueth; struct net_device *ndev = emac->ndev; /* connect PHY */ ndev->phydev = of_phy_connect(emac->ndev, emac->phy_node, &emac_adjust_link, 0, emac->phy_if); if (!ndev->phydev) { dev_err(prueth->dev, "couldn't connect to phy %s\n", emac->phy_node->full_name); return -ENODEV; } /* remove unsupported modes */ phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_10baseT_Half_BIT); phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_100baseT_Half_BIT); phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT); phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_Pause_BIT); phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_Asym_Pause_BIT); if (emac->phy_if == PHY_INTERFACE_MODE_MII) phy_set_max_speed(ndev->phydev, SPEED_100); return 0; } static u64 prueth_iep_gettime(void *clockops_data, struct ptp_system_timestamp *sts) { u32 hi_rollover_count, hi_rollover_count_r; struct prueth_emac *emac = clockops_data; struct prueth *prueth = emac->prueth; void __iomem *fw_hi_r_count_addr; void __iomem *fw_count_hi_addr; u32 iepcount_hi, iepcount_hi_r; unsigned long flags; u32 iepcount_lo; u64 ts = 0; fw_count_hi_addr = prueth->shram.va + TIMESYNC_FW_WC_COUNT_HI_SW_OFFSET_OFFSET; fw_hi_r_count_addr = prueth->shram.va + TIMESYNC_FW_WC_HI_ROLLOVER_COUNT_OFFSET; local_irq_save(flags); do { iepcount_hi = icss_iep_get_count_hi(emac->iep); iepcount_hi += readl(fw_count_hi_addr); hi_rollover_count = readl(fw_hi_r_count_addr); ptp_read_system_prets(sts); iepcount_lo = icss_iep_get_count_low(emac->iep); ptp_read_system_postts(sts); iepcount_hi_r = icss_iep_get_count_hi(emac->iep); iepcount_hi_r += readl(fw_count_hi_addr); hi_rollover_count_r = readl(fw_hi_r_count_addr); } while ((iepcount_hi_r != iepcount_hi) || (hi_rollover_count != hi_rollover_count_r)); local_irq_restore(flags); ts = ((u64)hi_rollover_count) << 23 | iepcount_hi; ts = ts * (u64)IEP_DEFAULT_CYCLE_TIME_NS + iepcount_lo; return ts; } static void prueth_iep_settime(void *clockops_data, u64 ns) { struct icssg_setclock_desc __iomem *sc_descp; struct prueth_emac *emac = clockops_data; struct icssg_setclock_desc sc_desc; u64 cyclecount; u32 cycletime; int timeout; if (!emac->fw_running) return; sc_descp = emac->prueth->shram.va + TIMESYNC_FW_WC_SETCLOCK_DESC_OFFSET; cycletime = IEP_DEFAULT_CYCLE_TIME_NS; cyclecount = ns / cycletime; memset(&sc_desc, 0, sizeof(sc_desc)); sc_desc.margin = cycletime - 1000; sc_desc.cyclecounter0_set = cyclecount & GENMASK(31, 0); sc_desc.cyclecounter1_set = (cyclecount & GENMASK(63, 32)) >> 32; sc_desc.iepcount_set = ns % cycletime; sc_desc.CMP0_current = cycletime - 4; //Count from 0 to (cycle time)-4 memcpy_toio(sc_descp, &sc_desc, sizeof(sc_desc)); writeb(1, &sc_descp->request); timeout = 5; /* fw should take 2-3 ms */ while (timeout--) { if (readb(&sc_descp->acknowledgment)) return; usleep_range(500, 1000); } dev_err(emac->prueth->dev, "settime timeout\n"); } static int prueth_perout_enable(void *clockops_data, struct ptp_perout_request *req, int on, u64 *cmp) { struct prueth_emac *emac = clockops_data; u32 reduction_factor = 0, offset = 0; struct timespec64 ts; u64 current_cycle; u64 start_offset; u64 ns_period; if (!on) return 0; /* Any firmware specific stuff for PPS/PEROUT handling */ ts.tv_sec = req->period.sec; ts.tv_nsec = req->period.nsec; ns_period = timespec64_to_ns(&ts); /* f/w doesn't support period less than cycle time */ if (ns_period < IEP_DEFAULT_CYCLE_TIME_NS) return -ENXIO; reduction_factor = ns_period / IEP_DEFAULT_CYCLE_TIME_NS; offset = ns_period % IEP_DEFAULT_CYCLE_TIME_NS; /* f/w requires at least 1uS within a cycle so CMP * can trigger after SYNC is enabled */ if (offset < 5 * NSEC_PER_USEC) offset = 5 * NSEC_PER_USEC; /* if offset is close to cycle time then we will miss * the CMP event for last tick when IEP rolls over. * In normal mode, IEP tick is 4ns. * In slow compensation it could be 0ns or 8ns at * every slow compensation cycle. */ if (offset > IEP_DEFAULT_CYCLE_TIME_NS - 8) offset = IEP_DEFAULT_CYCLE_TIME_NS - 8; /* we're in shadow mode so need to set upper 32-bits */ *cmp = (u64)offset << 32; writel(reduction_factor, emac->prueth->shram.va + TIMESYNC_FW_WC_SYNCOUT_REDUCTION_FACTOR_OFFSET); current_cycle = icssg_read_time(emac->prueth->shram.va + TIMESYNC_FW_WC_CYCLECOUNT_OFFSET); /* Rounding of current_cycle count to next second */ start_offset = roundup(current_cycle, MSEC_PER_SEC); hi_lo_writeq(start_offset, emac->prueth->shram.va + TIMESYNC_FW_WC_SYNCOUT_START_TIME_CYCLECOUNT_OFFSET); return 0; } const struct icss_iep_clockops prueth_iep_clockops = { .settime = prueth_iep_settime, .gettime = prueth_iep_gettime, .perout_enable = prueth_perout_enable, }; /** * emac_ndo_open - EMAC device open * @ndev: network adapter device * * Called when system wants to start the interface. * * Return: 0 for a successful open, or appropriate error code */ static int emac_ndo_open(struct net_device *ndev) { struct prueth_emac *emac = netdev_priv(ndev); int ret, i, num_data_chn = emac->tx_ch_num; struct prueth *prueth = emac->prueth; int slice = prueth_emac_slice(emac); struct device *dev = prueth->dev; int max_rx_flows; int rx_flow; /* clear SMEM and MSMC settings for all slices */ if (!prueth->emacs_initialized) { memset_io(prueth->msmcram.va, 0, prueth->msmcram.size); memset_io(prueth->shram.va, 0, ICSSG_CONFIG_OFFSET_SLICE1 * PRUETH_NUM_MACS); } /* set h/w MAC as user might have re-configured */ ether_addr_copy(emac->mac_addr, ndev->dev_addr); icssg_class_set_mac_addr(prueth->miig_rt, slice, emac->mac_addr); icssg_ft1_set_mac_addr(prueth->miig_rt, slice, emac->mac_addr); icssg_class_default(prueth->miig_rt, slice, 0); /* Notify the stack of the actual queue counts. */ ret = netif_set_real_num_tx_queues(ndev, num_data_chn); if (ret) { dev_err(dev, "cannot set real number of tx queues\n"); return ret; } init_completion(&emac->cmd_complete); ret = prueth_init_tx_chns(emac); if (ret) { dev_err(dev, "failed to init tx channel: %d\n", ret); return ret; } max_rx_flows = PRUETH_MAX_RX_FLOWS; ret = prueth_init_rx_chns(emac, &emac->rx_chns, "rx", max_rx_flows, PRUETH_MAX_RX_DESC); if (ret) { dev_err(dev, "failed to init rx channel: %d\n", ret); goto cleanup_tx; } ret = prueth_ndev_add_tx_napi(emac); if (ret) goto cleanup_rx; /* we use only the highest priority flow for now i.e. @irq[3] */ rx_flow = PRUETH_RX_FLOW_DATA; ret = request_irq(emac->rx_chns.irq[rx_flow], prueth_rx_irq, IRQF_TRIGGER_HIGH, dev_name(dev), emac); if (ret) { dev_err(dev, "unable to request RX IRQ\n"); goto cleanup_napi; } /* reset and start PRU firmware */ ret = prueth_emac_start(prueth, emac); if (ret) goto free_rx_irq; icssg_mii_update_mtu(prueth->mii_rt, slice, ndev->max_mtu); if (!prueth->emacs_initialized) { ret = icss_iep_init(emac->iep, &prueth_iep_clockops, emac, IEP_DEFAULT_CYCLE_TIME_NS); } ret = request_threaded_irq(emac->tx_ts_irq, NULL, prueth_tx_ts_irq, IRQF_ONESHOT, dev_name(dev), emac); if (ret) goto stop; /* Prepare RX */ ret = prueth_prepare_rx_chan(emac, &emac->rx_chns, PRUETH_MAX_PKT_SIZE); if (ret) goto free_tx_ts_irq; ret = k3_udma_glue_enable_rx_chn(emac->rx_chns.rx_chn); if (ret) goto reset_rx_chn; for (i = 0; i < emac->tx_ch_num; i++) { ret = k3_udma_glue_enable_tx_chn(emac->tx_chns[i].tx_chn); if (ret) goto reset_tx_chan; } /* Enable NAPI in Tx and Rx direction */ for (i = 0; i < emac->tx_ch_num; i++) napi_enable(&emac->tx_chns[i].napi_tx); napi_enable(&emac->napi_rx); /* start PHY */ phy_start(ndev->phydev); prueth->emacs_initialized++; queue_work(system_long_wq, &emac->stats_work.work); return 0; reset_tx_chan: /* Since interface is not yet up, there is wouldn't be * any SKB for completion. So set false to free_skb */ prueth_reset_tx_chan(emac, i, false); reset_rx_chn: prueth_reset_rx_chan(&emac->rx_chns, max_rx_flows, false); free_tx_ts_irq: free_irq(emac->tx_ts_irq, emac); stop: prueth_emac_stop(emac); free_rx_irq: free_irq(emac->rx_chns.irq[rx_flow], emac); cleanup_napi: prueth_ndev_del_tx_napi(emac, emac->tx_ch_num); cleanup_rx: prueth_cleanup_rx_chns(emac, &emac->rx_chns, max_rx_flows); cleanup_tx: prueth_cleanup_tx_chns(emac); return ret; } /** * emac_ndo_stop - EMAC device stop * @ndev: network adapter device * * Called when system wants to stop or down the interface. * * Return: Always 0 (Success) */ static int emac_ndo_stop(struct net_device *ndev) { struct prueth_emac *emac = netdev_priv(ndev); struct prueth *prueth = emac->prueth; int rx_flow = PRUETH_RX_FLOW_DATA; int max_rx_flows; int ret, i; /* inform the upper layers. */ netif_tx_stop_all_queues(ndev); /* block packets from wire */ if (ndev->phydev) phy_stop(ndev->phydev); icssg_class_disable(prueth->miig_rt, prueth_emac_slice(emac)); atomic_set(&emac->tdown_cnt, emac->tx_ch_num); /* ensure new tdown_cnt value is visible */ smp_mb__after_atomic(); /* tear down and disable UDMA channels */ reinit_completion(&emac->tdown_complete); for (i = 0; i < emac->tx_ch_num; i++) k3_udma_glue_tdown_tx_chn(emac->tx_chns[i].tx_chn, false); ret = wait_for_completion_timeout(&emac->tdown_complete, msecs_to_jiffies(1000)); if (!ret) netdev_err(ndev, "tx teardown timeout\n"); prueth_reset_tx_chan(emac, emac->tx_ch_num, true); for (i = 0; i < emac->tx_ch_num; i++) napi_disable(&emac->tx_chns[i].napi_tx); max_rx_flows = PRUETH_MAX_RX_FLOWS; k3_udma_glue_tdown_rx_chn(emac->rx_chns.rx_chn, true); prueth_reset_rx_chan(&emac->rx_chns, max_rx_flows, true); napi_disable(&emac->napi_rx); cancel_work_sync(&emac->rx_mode_work); /* Destroying the queued work in ndo_stop() */ cancel_delayed_work_sync(&emac->stats_work); /* stop PRUs */ prueth_emac_stop(emac); if (prueth->emacs_initialized == 1) icss_iep_exit(emac->iep); /* stop PRUs */ prueth_emac_stop(emac); free_irq(emac->tx_ts_irq, emac); free_irq(emac->rx_chns.irq[rx_flow], emac); prueth_ndev_del_tx_napi(emac, emac->tx_ch_num); prueth_cleanup_tx_chns(emac); prueth_cleanup_rx_chns(emac, &emac->rx_chns, max_rx_flows); prueth_cleanup_tx_chns(emac); prueth->emacs_initialized--; return 0; } static void emac_ndo_tx_timeout(struct net_device *ndev, unsigned int txqueue) { ndev->stats.tx_errors++; } static void emac_ndo_set_rx_mode_work(struct work_struct *work) { struct prueth_emac *emac = container_of(work, struct prueth_emac, rx_mode_work); struct net_device *ndev = emac->ndev; bool promisc, allmulti; if (!netif_running(ndev)) return; promisc = ndev->flags & IFF_PROMISC; allmulti = ndev->flags & IFF_ALLMULTI; emac_set_port_state(emac, ICSSG_EMAC_PORT_UC_FLOODING_DISABLE); emac_set_port_state(emac, ICSSG_EMAC_PORT_MC_FLOODING_DISABLE); if (promisc) { emac_set_port_state(emac, ICSSG_EMAC_PORT_UC_FLOODING_ENABLE); emac_set_port_state(emac, ICSSG_EMAC_PORT_MC_FLOODING_ENABLE); return; } if (allmulti) { emac_set_port_state(emac, ICSSG_EMAC_PORT_MC_FLOODING_ENABLE); return; } if (!netdev_mc_empty(ndev)) { emac_set_port_state(emac, ICSSG_EMAC_PORT_MC_FLOODING_ENABLE); return; } } /** * emac_ndo_set_rx_mode - EMAC set receive mode function * @ndev: The EMAC network adapter * * Called when system wants to set the receive mode of the device. * */ static void emac_ndo_set_rx_mode(struct net_device *ndev) { struct prueth_emac *emac = netdev_priv(ndev); queue_work(emac->cmd_wq, &emac->rx_mode_work); } static int emac_set_ts_config(struct net_device *ndev, struct ifreq *ifr) { struct prueth_emac *emac = netdev_priv(ndev); struct hwtstamp_config config; if (copy_from_user(&config, ifr->ifr_data, sizeof(config))) return -EFAULT; switch (config.tx_type) { case HWTSTAMP_TX_OFF: emac->tx_ts_enabled = 0; break; case HWTSTAMP_TX_ON: emac->tx_ts_enabled = 1; break; default: return -ERANGE; } switch (config.rx_filter) { case HWTSTAMP_FILTER_NONE: emac->rx_ts_enabled = 0; break; case HWTSTAMP_FILTER_ALL: case HWTSTAMP_FILTER_SOME: case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: case HWTSTAMP_FILTER_PTP_V2_EVENT: case HWTSTAMP_FILTER_PTP_V2_SYNC: case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: case HWTSTAMP_FILTER_NTP_ALL: emac->rx_ts_enabled = 1; config.rx_filter = HWTSTAMP_FILTER_ALL; break; default: return -ERANGE; } return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ? -EFAULT : 0; } static int emac_get_ts_config(struct net_device *ndev, struct ifreq *ifr) { struct prueth_emac *emac = netdev_priv(ndev); struct hwtstamp_config config; config.flags = 0; config.tx_type = emac->tx_ts_enabled ? HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF; config.rx_filter = emac->rx_ts_enabled ? HWTSTAMP_FILTER_ALL : HWTSTAMP_FILTER_NONE; return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ? -EFAULT : 0; } static int emac_ndo_ioctl(struct net_device *ndev, struct ifreq *ifr, int cmd) { switch (cmd) { case SIOCGHWTSTAMP: return emac_get_ts_config(ndev, ifr); case SIOCSHWTSTAMP: return emac_set_ts_config(ndev, ifr); default: break; } return phy_do_ioctl(ndev, ifr, cmd); } static void emac_ndo_get_stats64(struct net_device *ndev, struct rtnl_link_stats64 *stats) { struct prueth_emac *emac = netdev_priv(ndev); emac_update_hardware_stats(emac); stats->rx_packets = emac_get_stat_by_name(emac, "rx_packets"); stats->rx_bytes = emac_get_stat_by_name(emac, "rx_bytes"); stats->tx_packets = emac_get_stat_by_name(emac, "tx_packets"); stats->tx_bytes = emac_get_stat_by_name(emac, "tx_bytes"); stats->rx_crc_errors = emac_get_stat_by_name(emac, "rx_crc_errors"); stats->rx_over_errors = emac_get_stat_by_name(emac, "rx_over_errors"); stats->multicast = emac_get_stat_by_name(emac, "rx_multicast_frames"); stats->rx_errors = ndev->stats.rx_errors; stats->rx_dropped = ndev->stats.rx_dropped; stats->tx_errors = ndev->stats.tx_errors; stats->tx_dropped = ndev->stats.tx_dropped; } static const struct net_device_ops emac_netdev_ops = { .ndo_open = emac_ndo_open, .ndo_stop = emac_ndo_stop, .ndo_start_xmit = emac_ndo_start_xmit, .ndo_set_mac_address = eth_mac_addr, .ndo_validate_addr = eth_validate_addr, .ndo_tx_timeout = emac_ndo_tx_timeout, .ndo_set_rx_mode = emac_ndo_set_rx_mode, .ndo_eth_ioctl = emac_ndo_ioctl, .ndo_get_stats64 = emac_ndo_get_stats64, }; /* get emac_port corresponding to eth_node name */ static int prueth_node_port(struct device_node *eth_node) { u32 port_id; int ret; ret = of_property_read_u32(eth_node, "reg", &port_id); if (ret) return ret; if (port_id == 0) return PRUETH_PORT_MII0; else if (port_id == 1) return PRUETH_PORT_MII1; else return PRUETH_PORT_INVALID; } /* get MAC instance corresponding to eth_node name */ static int prueth_node_mac(struct device_node *eth_node) { u32 port_id; int ret; ret = of_property_read_u32(eth_node, "reg", &port_id); if (ret) return ret; if (port_id == 0) return PRUETH_MAC0; else if (port_id == 1) return PRUETH_MAC1; else return PRUETH_MAC_INVALID; } static int prueth_netdev_init(struct prueth *prueth, struct device_node *eth_node) { int ret, num_tx_chn = PRUETH_MAX_TX_QUEUES; struct prueth_emac *emac; struct net_device *ndev; enum prueth_port port; const char *irq_name; enum prueth_mac mac; port = prueth_node_port(eth_node); if (port == PRUETH_PORT_INVALID) return -EINVAL; mac = prueth_node_mac(eth_node); if (mac == PRUETH_MAC_INVALID) return -EINVAL; ndev = alloc_etherdev_mq(sizeof(*emac), num_tx_chn); if (!ndev) return -ENOMEM; emac = netdev_priv(ndev); emac->prueth = prueth; emac->ndev = ndev; emac->port_id = port; emac->cmd_wq = create_singlethread_workqueue("icssg_cmd_wq"); if (!emac->cmd_wq) { ret = -ENOMEM; goto free_ndev; } INIT_WORK(&emac->rx_mode_work, emac_ndo_set_rx_mode_work); INIT_DELAYED_WORK(&emac->stats_work, emac_stats_work_handler); ret = pruss_request_mem_region(prueth->pruss, port == PRUETH_PORT_MII0 ? PRUSS_MEM_DRAM0 : PRUSS_MEM_DRAM1, &emac->dram); if (ret) { dev_err(prueth->dev, "unable to get DRAM: %d\n", ret); ret = -ENOMEM; goto free_wq; } emac->tx_ch_num = 1; irq_name = "tx_ts0"; if (emac->port_id == PRUETH_PORT_MII1) irq_name = "tx_ts1"; emac->tx_ts_irq = platform_get_irq_byname_optional(prueth->pdev, irq_name); if (emac->tx_ts_irq < 0) { ret = dev_err_probe(prueth->dev, emac->tx_ts_irq, "could not get tx_ts_irq\n"); goto free; } SET_NETDEV_DEV(ndev, prueth->dev); spin_lock_init(&emac->lock); mutex_init(&emac->cmd_lock); emac->phy_node = of_parse_phandle(eth_node, "phy-handle", 0); if (!emac->phy_node && !of_phy_is_fixed_link(eth_node)) { dev_err(prueth->dev, "couldn't find phy-handle\n"); ret = -ENODEV; goto free; } else if (of_phy_is_fixed_link(eth_node)) { ret = of_phy_register_fixed_link(eth_node); if (ret) { ret = dev_err_probe(prueth->dev, ret, "failed to register fixed-link phy\n"); goto free; } emac->phy_node = eth_node; } ret = of_get_phy_mode(eth_node, &emac->phy_if); if (ret) { dev_err(prueth->dev, "could not get phy-mode property\n"); goto free; } if (emac->phy_if != PHY_INTERFACE_MODE_MII && !phy_interface_mode_is_rgmii(emac->phy_if)) { dev_err(prueth->dev, "PHY mode unsupported %s\n", phy_modes(emac->phy_if)); ret = -EINVAL; goto free; } /* AM65 SR2.0 has TX Internal delay always enabled by hardware * and it is not possible to disable TX Internal delay. The below * switch case block describes how we handle different phy modes * based on hardware restriction. */ switch (emac->phy_if) { case PHY_INTERFACE_MODE_RGMII_ID: emac->phy_if = PHY_INTERFACE_MODE_RGMII_RXID; break; case PHY_INTERFACE_MODE_RGMII_TXID: emac->phy_if = PHY_INTERFACE_MODE_RGMII; break; case PHY_INTERFACE_MODE_RGMII: case PHY_INTERFACE_MODE_RGMII_RXID: dev_err(prueth->dev, "RGMII mode without TX delay is not supported"); ret = -EINVAL; goto free; default: break; } /* get mac address from DT and set private and netdev addr */ ret = of_get_ethdev_address(eth_node, ndev); if (!is_valid_ether_addr(ndev->dev_addr)) { eth_hw_addr_random(ndev); dev_warn(prueth->dev, "port %d: using random MAC addr: %pM\n", port, ndev->dev_addr); } ether_addr_copy(emac->mac_addr, ndev->dev_addr); ndev->min_mtu = PRUETH_MIN_PKT_SIZE; ndev->max_mtu = PRUETH_MAX_MTU; ndev->netdev_ops = &emac_netdev_ops; ndev->ethtool_ops = &icssg_ethtool_ops; ndev->hw_features = NETIF_F_SG; ndev->features = ndev->hw_features; netif_napi_add(ndev, &emac->napi_rx, emac_napi_rx_poll); prueth->emac[mac] = emac; return 0; free: pruss_release_mem_region(prueth->pruss, &emac->dram); free_wq: destroy_workqueue(emac->cmd_wq); free_ndev: emac->ndev = NULL; prueth->emac[mac] = NULL; free_netdev(ndev); return ret; } static void prueth_netdev_exit(struct prueth *prueth, struct device_node *eth_node) { struct prueth_emac *emac; enum prueth_mac mac; mac = prueth_node_mac(eth_node); if (mac == PRUETH_MAC_INVALID) return; emac = prueth->emac[mac]; if (!emac) return; if (of_phy_is_fixed_link(emac->phy_node)) of_phy_deregister_fixed_link(emac->phy_node); netif_napi_del(&emac->napi_rx); pruss_release_mem_region(prueth->pruss, &emac->dram); destroy_workqueue(emac->cmd_wq); free_netdev(emac->ndev); prueth->emac[mac] = NULL; } static int prueth_get_cores(struct prueth *prueth, int slice) { struct device *dev = prueth->dev; enum pruss_pru_id pruss_id; struct device_node *np; int idx = -1, ret; np = dev->of_node; switch (slice) { case ICSS_SLICE0: idx = 0; break; case ICSS_SLICE1: idx = 3; break; default: return -EINVAL; } prueth->pru[slice] = pru_rproc_get(np, idx, &pruss_id); if (IS_ERR(prueth->pru[slice])) { ret = PTR_ERR(prueth->pru[slice]); prueth->pru[slice] = NULL; return dev_err_probe(dev, ret, "unable to get PRU%d\n", slice); } prueth->pru_id[slice] = pruss_id; idx++; prueth->rtu[slice] = pru_rproc_get(np, idx, NULL); if (IS_ERR(prueth->rtu[slice])) { ret = PTR_ERR(prueth->rtu[slice]); prueth->rtu[slice] = NULL; return dev_err_probe(dev, ret, "unable to get RTU%d\n", slice); } idx++; prueth->txpru[slice] = pru_rproc_get(np, idx, NULL); if (IS_ERR(prueth->txpru[slice])) { ret = PTR_ERR(prueth->txpru[slice]); prueth->txpru[slice] = NULL; return dev_err_probe(dev, ret, "unable to get TX_PRU%d\n", slice); } return 0; } static void prueth_put_cores(struct prueth *prueth, int slice) { if (prueth->txpru[slice]) pru_rproc_put(prueth->txpru[slice]); if (prueth->rtu[slice]) pru_rproc_put(prueth->rtu[slice]); if (prueth->pru[slice]) pru_rproc_put(prueth->pru[slice]); } static const struct of_device_id prueth_dt_match[]; static int prueth_probe(struct platform_device *pdev) { struct device_node *eth_node, *eth_ports_node; struct device_node *eth0_node = NULL; struct device_node *eth1_node = NULL; struct genpool_data_align gp_data = { .align = SZ_64K, }; const struct of_device_id *match; struct device *dev = &pdev->dev; struct device_node *np; struct prueth *prueth; struct pruss *pruss; u32 msmc_ram_size; int i, ret; np = dev->of_node; match = of_match_device(prueth_dt_match, dev); if (!match) return -ENODEV; prueth = devm_kzalloc(dev, sizeof(*prueth), GFP_KERNEL); if (!prueth) return -ENOMEM; dev_set_drvdata(dev, prueth); prueth->pdev = pdev; prueth->pdata = *(const struct prueth_pdata *)match->data; prueth->dev = dev; eth_ports_node = of_get_child_by_name(np, "ethernet-ports"); if (!eth_ports_node) return -ENOENT; for_each_child_of_node(eth_ports_node, eth_node) { u32 reg; if (strcmp(eth_node->name, "port")) continue; ret = of_property_read_u32(eth_node, "reg", ®); if (ret < 0) { dev_err(dev, "%pOF error reading port_id %d\n", eth_node, ret); } of_node_get(eth_node); if (reg == 0) { eth0_node = eth_node; if (!of_device_is_available(eth0_node)) { of_node_put(eth0_node); eth0_node = NULL; } } else if (reg == 1) { eth1_node = eth_node; if (!of_device_is_available(eth1_node)) { of_node_put(eth1_node); eth1_node = NULL; } } else { dev_err(dev, "port reg should be 0 or 1\n"); } } of_node_put(eth_ports_node); /* At least one node must be present and available else we fail */ if (!eth0_node && !eth1_node) { dev_err(dev, "neither port0 nor port1 node available\n"); return -ENODEV; } if (eth0_node == eth1_node) { dev_err(dev, "port0 and port1 can't have same reg\n"); of_node_put(eth0_node); return -ENODEV; } prueth->eth_node[PRUETH_MAC0] = eth0_node; prueth->eth_node[PRUETH_MAC1] = eth1_node; prueth->miig_rt = syscon_regmap_lookup_by_phandle(np, "ti,mii-g-rt"); if (IS_ERR(prueth->miig_rt)) { dev_err(dev, "couldn't get ti,mii-g-rt syscon regmap\n"); return -ENODEV; } prueth->mii_rt = syscon_regmap_lookup_by_phandle(np, "ti,mii-rt"); if (IS_ERR(prueth->mii_rt)) { dev_err(dev, "couldn't get ti,mii-rt syscon regmap\n"); return -ENODEV; } if (eth0_node) { ret = prueth_get_cores(prueth, ICSS_SLICE0); if (ret) goto put_cores; } if (eth1_node) { ret = prueth_get_cores(prueth, ICSS_SLICE1); if (ret) goto put_cores; } pruss = pruss_get(eth0_node ? prueth->pru[ICSS_SLICE0] : prueth->pru[ICSS_SLICE1]); if (IS_ERR(pruss)) { ret = PTR_ERR(pruss); dev_err(dev, "unable to get pruss handle\n"); goto put_cores; } prueth->pruss = pruss; ret = pruss_request_mem_region(pruss, PRUSS_MEM_SHRD_RAM2, &prueth->shram); if (ret) { dev_err(dev, "unable to get PRUSS SHRD RAM2: %d\n", ret); goto put_pruss; } prueth->sram_pool = of_gen_pool_get(np, "sram", 0); if (!prueth->sram_pool) { dev_err(dev, "unable to get SRAM pool\n"); ret = -ENODEV; goto put_mem; } msmc_ram_size = MSMC_RAM_SIZE; /* NOTE: FW bug needs buffer base to be 64KB aligned */ prueth->msmcram.va = (void __iomem *)gen_pool_alloc_algo(prueth->sram_pool, msmc_ram_size, gen_pool_first_fit_align, &gp_data); if (!prueth->msmcram.va) { ret = -ENOMEM; dev_err(dev, "unable to allocate MSMC resource\n"); goto put_mem; } prueth->msmcram.pa = gen_pool_virt_to_phys(prueth->sram_pool, (unsigned long)prueth->msmcram.va); prueth->msmcram.size = msmc_ram_size; memset_io(prueth->msmcram.va, 0, msmc_ram_size); dev_dbg(dev, "sram: pa %llx va %p size %zx\n", prueth->msmcram.pa, prueth->msmcram.va, prueth->msmcram.size); prueth->iep0 = icss_iep_get_idx(np, 0); if (IS_ERR(prueth->iep0)) { ret = dev_err_probe(dev, PTR_ERR(prueth->iep0), "iep0 get failed\n"); prueth->iep0 = NULL; goto free_pool; } prueth->iep1 = icss_iep_get_idx(np, 1); if (IS_ERR(prueth->iep1)) { ret = dev_err_probe(dev, PTR_ERR(prueth->iep1), "iep1 get failed\n"); goto put_iep0; } if (prueth->pdata.quirk_10m_link_issue) { /* Enable IEP1 for FW in 64bit mode as W/A for 10M FD link detect issue under TX * traffic. */ icss_iep_init_fw(prueth->iep1); } /* setup netdev interfaces */ if (eth0_node) { ret = prueth_netdev_init(prueth, eth0_node); if (ret) { dev_err_probe(dev, ret, "netdev init %s failed\n", eth0_node->name); goto exit_iep; } prueth->emac[PRUETH_MAC0]->iep = prueth->iep0; } if (eth1_node) { ret = prueth_netdev_init(prueth, eth1_node); if (ret) { dev_err_probe(dev, ret, "netdev init %s failed\n", eth1_node->name); goto netdev_exit; } prueth->emac[PRUETH_MAC1]->iep = prueth->iep0; } /* register the network devices */ if (eth0_node) { ret = register_netdev(prueth->emac[PRUETH_MAC0]->ndev); if (ret) { dev_err(dev, "can't register netdev for port MII0"); goto netdev_exit; } prueth->registered_netdevs[PRUETH_MAC0] = prueth->emac[PRUETH_MAC0]->ndev; ret = emac_phy_connect(prueth->emac[PRUETH_MAC0]); if (ret) { dev_err(dev, "can't connect to MII0 PHY, error -%d", ret); goto netdev_unregister; } phy_attached_info(prueth->emac[PRUETH_MAC0]->ndev->phydev); } if (eth1_node) { ret = register_netdev(prueth->emac[PRUETH_MAC1]->ndev); if (ret) { dev_err(dev, "can't register netdev for port MII1"); goto netdev_unregister; } prueth->registered_netdevs[PRUETH_MAC1] = prueth->emac[PRUETH_MAC1]->ndev; ret = emac_phy_connect(prueth->emac[PRUETH_MAC1]); if (ret) { dev_err(dev, "can't connect to MII1 PHY, error %d", ret); goto netdev_unregister; } phy_attached_info(prueth->emac[PRUETH_MAC1]->ndev->phydev); } dev_info(dev, "TI PRU ethernet driver initialized: %s EMAC mode\n", (!eth0_node || !eth1_node) ? "single" : "dual"); if (eth1_node) of_node_put(eth1_node); if (eth0_node) of_node_put(eth0_node); return 0; netdev_unregister: for (i = 0; i < PRUETH_NUM_MACS; i++) { if (!prueth->registered_netdevs[i]) continue; if (prueth->emac[i]->ndev->phydev) { phy_disconnect(prueth->emac[i]->ndev->phydev); prueth->emac[i]->ndev->phydev = NULL; } unregister_netdev(prueth->registered_netdevs[i]); } netdev_exit: for (i = 0; i < PRUETH_NUM_MACS; i++) { eth_node = prueth->eth_node[i]; if (!eth_node) continue; prueth_netdev_exit(prueth, eth_node); } exit_iep: if (prueth->pdata.quirk_10m_link_issue) icss_iep_exit_fw(prueth->iep1); icss_iep_put(prueth->iep1); put_iep0: icss_iep_put(prueth->iep0); prueth->iep0 = NULL; prueth->iep1 = NULL; free_pool: gen_pool_free(prueth->sram_pool, (unsigned long)prueth->msmcram.va, msmc_ram_size); put_mem: pruss_release_mem_region(prueth->pruss, &prueth->shram); put_pruss: pruss_put(prueth->pruss); put_cores: if (eth1_node) { prueth_put_cores(prueth, ICSS_SLICE1); of_node_put(eth1_node); } if (eth0_node) { prueth_put_cores(prueth, ICSS_SLICE0); of_node_put(eth0_node); } return ret; } static void prueth_remove(struct platform_device *pdev) { struct prueth *prueth = platform_get_drvdata(pdev); struct device_node *eth_node; int i; for (i = 0; i < PRUETH_NUM_MACS; i++) { if (!prueth->registered_netdevs[i]) continue; phy_stop(prueth->emac[i]->ndev->phydev); phy_disconnect(prueth->emac[i]->ndev->phydev); prueth->emac[i]->ndev->phydev = NULL; unregister_netdev(prueth->registered_netdevs[i]); } for (i = 0; i < PRUETH_NUM_MACS; i++) { eth_node = prueth->eth_node[i]; if (!eth_node) continue; prueth_netdev_exit(prueth, eth_node); } if (prueth->pdata.quirk_10m_link_issue) icss_iep_exit_fw(prueth->iep1); icss_iep_put(prueth->iep1); icss_iep_put(prueth->iep0); gen_pool_free(prueth->sram_pool, (unsigned long)prueth->msmcram.va, MSMC_RAM_SIZE); pruss_release_mem_region(prueth->pruss, &prueth->shram); pruss_put(prueth->pruss); if (prueth->eth_node[PRUETH_MAC1]) prueth_put_cores(prueth, ICSS_SLICE1); if (prueth->eth_node[PRUETH_MAC0]) prueth_put_cores(prueth, ICSS_SLICE0); } #ifdef CONFIG_PM_SLEEP static int prueth_suspend(struct device *dev) { struct prueth *prueth = dev_get_drvdata(dev); struct net_device *ndev; int i, ret; for (i = 0; i < PRUETH_NUM_MACS; i++) { ndev = prueth->registered_netdevs[i]; if (!ndev) continue; if (netif_running(ndev)) { netif_device_detach(ndev); ret = emac_ndo_stop(ndev); if (ret < 0) { netdev_err(ndev, "failed to stop: %d", ret); return ret; } } } return 0; } static int prueth_resume(struct device *dev) { struct prueth *prueth = dev_get_drvdata(dev); struct net_device *ndev; int i, ret; for (i = 0; i < PRUETH_NUM_MACS; i++) { ndev = prueth->registered_netdevs[i]; if (!ndev) continue; if (netif_running(ndev)) { ret = emac_ndo_open(ndev); if (ret < 0) { netdev_err(ndev, "failed to start: %d", ret); return ret; } netif_device_attach(ndev); } } return 0; } #endif /* CONFIG_PM_SLEEP */ static const struct dev_pm_ops prueth_dev_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(prueth_suspend, prueth_resume) }; static const struct prueth_pdata am654_icssg_pdata = { .fdqring_mode = K3_RINGACC_RING_MODE_MESSAGE, .quirk_10m_link_issue = 1, }; static const struct of_device_id prueth_dt_match[] = { { .compatible = "ti,am654-icssg-prueth", .data = &am654_icssg_pdata }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, prueth_dt_match); static struct platform_driver prueth_driver = { .probe = prueth_probe, .remove_new = prueth_remove, .driver = { .name = "icssg-prueth", .of_match_table = prueth_dt_match, .pm = &prueth_dev_pm_ops, }, }; module_platform_driver(prueth_driver); MODULE_AUTHOR("Roger Quadros "); MODULE_AUTHOR("Md Danish Anwar "); MODULE_DESCRIPTION("PRUSS ICSSG Ethernet Driver"); MODULE_LICENSE("GPL");