From patchwork Wed Apr 3 10:48:13 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Diogo Ivo X-Patchwork-Id: 13616019 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C9765CD1288 for ; Wed, 3 Apr 2024 12:04:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=t8vMBkbe1SijLFhpFz6U0cSgP7f9RwxAO5gzeOXhneE=; b=bLxihxR3IWkVJN G2Uy05yszkalEs3mNelMuXq/Lu2v+u79F5VwEa5CqKRCvCe4eWcGg2X6SuJPxU01b6lAC25uOiTDO z+d+ZBOS1PeKPPCljF9A41bGV3KkTmQ9kZn3uWJcUUgYlxTpLxfUVR/0Xvy0hd0b7ekNXbv4NW5oI /p4DE4DJYnYhGTdlRFQlVonN/dVsWQDHVCFp27Yy0sM+/f/pt2+ibWr3YJidmNpArCuau9uNCjXiK kl4kS2qgH8qYKjfJh3VT9iEWUGxbQ6e4V34ZOPIP+4FFThZZ9tUqADiT9oAAKstIX3TT/5yBl4Ygs SZ0u0HCUnMoMMdNhSgvg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rrzLi-0000000FsbS-44kg; Wed, 03 Apr 2024 12:04:14 +0000 Received: from mta-64-226.siemens.flowmailer.net ([185.136.64.226]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1rryAU-0000000FcuJ-0rFG for linux-arm-kernel@lists.infradead.org; Wed, 03 Apr 2024 10:48:43 +0000 Received: by mta-64-226.siemens.flowmailer.net with ESMTPSA id 202404031048285cfe7fa2aa51c49040 for ; Wed, 03 Apr 2024 12:48:29 +0200 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; s=fm1; d=siemens.com; i=diogo.ivo@siemens.com; h=Date:From:Subject:To:Message-ID:MIME-Version:Content-Type:Content-Transfer-Encoding:Cc:References:In-Reply-To; bh=dwWaTQENgIBphAg6vcb11BuK3P2YItPn2hi3TroWPIU=; b=m6lVr6kh6jGnaON8kjXhbwmceNVBIVFkNTN5MSEmlwfcEkJalh1P/4HtlQgmrkB/XhuqMz Wo7OhzwZWJryywksP9Od0T37+tHIV5KewvgabRNmNt5ppZ0tKhBJ5Heb1aDE9dBNn2YUINiJ 3D4YeBGyVJhabf3lug27II4QW5tRw=; From: Diogo Ivo To: davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, danishanwar@ti.com, rogerq@kernel.org, andrew@lunn.ch, vigneshr@ti.com, wsa+renesas@sang-engineering.com, dan.carpenter@linaro.org, netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Diogo Ivo , jan.kiszka@siemens.com Subject: [PATCH net-next v6 03/10] net: ti: icssg-prueth: Move common functions into a separate file Date: Wed, 3 Apr 2024 11:48:13 +0100 Message-ID: <20240403104821.283832-4-diogo.ivo@siemens.com> In-Reply-To: <20240403104821.283832-1-diogo.ivo@siemens.com> References: <20240403104821.283832-1-diogo.ivo@siemens.com> MIME-Version: 1.0 X-Flowmailer-Platform: Siemens Feedback-ID: 519:519-1320519:519-21489:flowmailer X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240403_034834_979673_08B324AF X-CRM114-Status: GOOD ( 24.80 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org In order to allow code sharing between Silicon Revisions 1.0 and 2.0 move all functions that can be shared into a common file. This commit introduces no functional changes. Signed-off-by: Diogo Ivo Reviewed-by: MD Danish Anwar --- Changes in v5: - Added Reviewed-by tag from Danish drivers/net/ethernet/ti/Makefile | 1 + drivers/net/ethernet/ti/icssg/icssg_common.c | 1198 ++++++++++++++++++ drivers/net/ethernet/ti/icssg/icssg_prueth.c | 1183 ----------------- drivers/net/ethernet/ti/icssg/icssg_prueth.h | 59 + 4 files changed, 1258 insertions(+), 1183 deletions(-) create mode 100644 drivers/net/ethernet/ti/icssg/icssg_common.c diff --git a/drivers/net/ethernet/ti/Makefile b/drivers/net/ethernet/ti/Makefile index d8590304f3df..4876f20aa495 100644 --- a/drivers/net/ethernet/ti/Makefile +++ b/drivers/net/ethernet/ti/Makefile @@ -33,6 +33,7 @@ obj-$(CONFIG_TI_K3_AM65_CPTS) += am65-cpts.o obj-$(CONFIG_TI_ICSSG_PRUETH) += icssg-prueth.o icssg-prueth-y := icssg/icssg_prueth.o \ + icssg/icssg_common.o \ icssg/icssg_classifier.o \ icssg/icssg_queues.o \ icssg/icssg_config.o \ diff --git a/drivers/net/ethernet/ti/icssg/icssg_common.c b/drivers/net/ethernet/ti/icssg/icssg_common.c new file mode 100644 index 000000000000..99f27ecc9352 --- /dev/null +++ b/drivers/net/ethernet/ti/icssg/icssg_common.c @@ -0,0 +1,1198 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* Texas Instruments ICSSG Ethernet Driver + * + * Copyright (C) 2018-2022 Texas Instruments Incorporated - https://www.ti.com/ + * Copyright (C) Siemens AG, 2024 + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "icssg_prueth.h" +#include "../k3-cppi-desc-pool.h" + +/* 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) + +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); +} + +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)); + } +} + +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); + } +} + +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); +} + +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; +} + +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; +} + +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; +} + +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); + rx_chn->irq[i] = k3_udma_glue_rx_get_irq(rx_chn->rx_chn, i); + if (rx_chn->irq[i] <= 0) { + ret = rx_chn->irq[i]; + netdev_err(ndev, "Failed to get rx dma irq"); + goto fail; + } + } + + return 0; + +fail: + prueth_cleanup_rx_chns(emac, rx_chn, max_rflows); + return ret; +} + +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); +} + +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; +} + +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 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 + */ +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); +} + +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; +} + +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]); +} + +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; + } + } +} + +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; +} + +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; +} + +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); + } +} + +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); +} + +void emac_ndo_tx_timeout(struct net_device *ndev, unsigned int txqueue) +{ + ndev->stats.tx_errors++; +} + +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; +} + +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); +} + +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; +} + +int emac_ndo_get_phys_port_name(struct net_device *ndev, char *name, + size_t len) +{ + struct prueth_emac *emac = netdev_priv(ndev); + int ret; + + ret = snprintf(name, len, "p%d", emac->port_id); + if (ret >= len) + return -EINVAL; + + return 0; +} + +/* get emac_port corresponding to eth_node name */ +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 */ +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; +} + +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; +} + +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; +} + +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]); +} + +#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 = ndev->netdev_ops->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 = ndev->netdev_ops->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 */ + +const struct dev_pm_ops prueth_dev_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(prueth_suspend, prueth_resume) +}; diff --git a/drivers/net/ethernet/ti/icssg/icssg_prueth.c b/drivers/net/ethernet/ti/icssg/icssg_prueth.c index cf7b73f8f450..e6eac01f9f99 100644 --- a/drivers/net/ethernet/ti/icssg/icssg_prueth.c +++ b/drivers/net/ethernet/ti/icssg/icssg_prueth.c @@ -34,568 +34,9 @@ #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); - rx_chn->irq[i] = k3_udma_glue_rx_get_irq(rx_chn->rx_chn, i); - if (rx_chn->irq[i] <= 0) { - ret = rx_chn->irq[i]; - netdev_err(ndev, "Failed to get rx dma irq"); - goto fail; - } - } - - 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) { @@ -661,208 +102,6 @@ static void tx_ts_work(struct prueth_emac *emac) } } -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; @@ -873,22 +112,6 @@ static irqreturn_t prueth_tx_ts_irq(int irq, void *dev_id) 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", @@ -953,41 +176,6 @@ static int prueth_emac_start(struct prueth *prueth, struct prueth_emac *emac) 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) { @@ -1055,86 +243,6 @@ static void emac_adjust_link(struct net_device *ndev) } } -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; @@ -1508,11 +616,6 @@ static int emac_ndo_stop(struct net_device *ndev) 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); @@ -1558,116 +661,6 @@ static void emac_ndo_set_rx_mode(struct net_device *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 int emac_ndo_get_phys_port_name(struct net_device *ndev, char *name, - size_t len) -{ - struct prueth_emac *emac = netdev_priv(ndev); - int ret; - - ret = snprintf(name, len, "p%d", emac->port_id); - if (ret >= len) - return -EINVAL; - - return 0; -} - static const struct net_device_ops emac_netdev_ops = { .ndo_open = emac_ndo_open, .ndo_stop = emac_ndo_stop, @@ -1681,42 +674,6 @@ static const struct net_device_ops emac_netdev_ops = { .ndo_get_phys_port_name = emac_ndo_get_phys_port_name, }; -/* 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) { @@ -1860,90 +817,6 @@ static int prueth_netdev_init(struct prueth *prueth, 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 int prueth_probe(struct platform_device *pdev) { struct device_node *eth_node, *eth_ports_node; @@ -2273,62 +1146,6 @@ static void prueth_remove(struct platform_device *pdev) 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, diff --git a/drivers/net/ethernet/ti/icssg/icssg_prueth.h b/drivers/net/ethernet/ti/icssg/icssg_prueth.h index 8b6d6b497010..5d792e9bade0 100644 --- a/drivers/net/ethernet/ti/icssg/icssg_prueth.h +++ b/drivers/net/ethernet/ti/icssg/icssg_prueth.h @@ -55,6 +55,8 @@ #define ICSSG_NUM_STANDARD_STATS 31 #define ICSSG_NUM_ETHTOOL_STATS (ICSSG_NUM_STATS - ICSSG_NUM_STANDARD_STATS) +#define IEP_DEFAULT_CYCLE_TIME_NS 1000000 /* 1 ms */ + /* Firmware status codes */ #define ICSS_HS_FW_READY 0x55555555 #define ICSS_HS_FW_DEAD 0xDEAD0000 /* lower 16 bits contain error code */ @@ -188,6 +190,12 @@ struct prueth_pdata { u32 quirk_10m_link_issue:1; }; +struct icssg_firmwares { + char *pru; + char *rtu; + char *txpru; +}; + /** * struct prueth - PRUeth structure * @dev: device @@ -257,6 +265,7 @@ static inline int prueth_emac_slice(struct prueth_emac *emac) } extern const struct ethtool_ops icssg_ethtool_ops; +extern const struct dev_pm_ops prueth_dev_pm_ops; /* Classifier helpers */ void icssg_class_set_mac_addr(struct regmap *miig_rt, int slice, u8 *mac); @@ -285,4 +294,54 @@ u32 icssg_queue_level(struct prueth *prueth, int queue); void emac_stats_work_handler(struct work_struct *work); void emac_update_hardware_stats(struct prueth_emac *emac); int emac_get_stat_by_name(struct prueth_emac *emac, char *stat_name); + +/* Common functions */ +void prueth_cleanup_rx_chns(struct prueth_emac *emac, + struct prueth_rx_chn *rx_chn, + int max_rflows); +void prueth_cleanup_tx_chns(struct prueth_emac *emac); +void prueth_ndev_del_tx_napi(struct prueth_emac *emac, int num); +void prueth_xmit_free(struct prueth_tx_chn *tx_chn, + struct cppi5_host_desc_t *desc); +int emac_tx_complete_packets(struct prueth_emac *emac, int chn, + int budget); +int prueth_ndev_add_tx_napi(struct prueth_emac *emac); +int prueth_init_tx_chns(struct prueth_emac *emac); +int prueth_init_rx_chns(struct prueth_emac *emac, + struct prueth_rx_chn *rx_chn, + char *name, u32 max_rflows, + u32 max_desc_num); +int prueth_dma_rx_push(struct prueth_emac *emac, + struct sk_buff *skb, + struct prueth_rx_chn *rx_chn); +void emac_rx_timestamp(struct prueth_emac *emac, + struct sk_buff *skb, u32 *psdata); +enum netdev_tx emac_ndo_start_xmit(struct sk_buff *skb, struct net_device *ndev); +irqreturn_t prueth_rx_irq(int irq, void *dev_id); +void prueth_emac_stop(struct prueth_emac *emac); +void prueth_cleanup_tx_ts(struct prueth_emac *emac); +int emac_napi_rx_poll(struct napi_struct *napi_rx, int budget); +int prueth_prepare_rx_chan(struct prueth_emac *emac, + struct prueth_rx_chn *chn, + int buf_size); +void prueth_reset_tx_chan(struct prueth_emac *emac, int ch_num, + bool free_skb); +void prueth_reset_rx_chan(struct prueth_rx_chn *chn, + int num_flows, bool disable); +void emac_ndo_tx_timeout(struct net_device *ndev, unsigned int txqueue); +int emac_ndo_ioctl(struct net_device *ndev, struct ifreq *ifr, int cmd); +void emac_ndo_get_stats64(struct net_device *ndev, + struct rtnl_link_stats64 *stats); +int emac_ndo_get_phys_port_name(struct net_device *ndev, char *name, + size_t len); +int prueth_node_port(struct device_node *eth_node); +int prueth_node_mac(struct device_node *eth_node); +void prueth_netdev_exit(struct prueth *prueth, + struct device_node *eth_node); +int prueth_get_cores(struct prueth *prueth, int slice); +void prueth_put_cores(struct prueth *prueth, int slice); + +/* Revision specific helper */ +u64 icssg_ts_to_ns(u32 hi_sw, u32 hi, u32 lo, u32 cycle_time_ns); + #endif /* __NET_TI_ICSSG_PRUETH_H */