From patchwork Mon Aug 7 11:00:47 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: MD Danish Anwar X-Patchwork-Id: 711453 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 96799EB64DD for ; Mon, 7 Aug 2023 11:02:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231907AbjHGLCS (ORCPT ); Mon, 7 Aug 2023 07:02:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40434 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231829AbjHGLB6 (ORCPT ); Mon, 7 Aug 2023 07:01:58 -0400 Received: from fllv0015.ext.ti.com (fllv0015.ext.ti.com [198.47.19.141]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0B88C1FD0; Mon, 7 Aug 2023 04:01:40 -0700 (PDT) Received: from lelv0266.itg.ti.com ([10.180.67.225]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 377B1Mbd125851; Mon, 7 Aug 2023 06:01:22 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1691406082; bh=DaMI+qL9Q+yXfWZ7dR+mLKqN7JYeMzIasYOnffIaPrg=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=LZOwT8JLLTw3DXguWJNEiAlQtr+n2Ckl0tmVKCIdzN3PG7xDaI9SDZ+Ih49Z/uOmX 0OCQ5P8iXWV9kZjOkBtiD1W1Kk2scbaCJRbwOKksuSQxObvhOubrt3Xz1fYZlQ4K0F xVqts9lQHEoXmsZ8N9EUsYq9wIu8oMYh++pGog2E= Received: from DLEE108.ent.ti.com (dlee108.ent.ti.com [157.170.170.38]) by lelv0266.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 377B1Mr7075217 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 7 Aug 2023 06:01:22 -0500 Received: from DLEE114.ent.ti.com (157.170.170.25) by DLEE108.ent.ti.com (157.170.170.38) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23; Mon, 7 Aug 2023 06:01:21 -0500 Received: from lelv0327.itg.ti.com (10.180.67.183) by DLEE114.ent.ti.com (157.170.170.25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23 via Frontend Transport; Mon, 7 Aug 2023 06:01:21 -0500 Received: from fllv0122.itg.ti.com (fllv0122.itg.ti.com [10.247.120.72]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id 377B1LrT032143; Mon, 7 Aug 2023 06:01:21 -0500 Received: from localhost (uda0501179.dhcp.ti.com [172.24.227.217]) by fllv0122.itg.ti.com (8.14.7/8.14.7) with ESMTP id 377B1KRv028419; Mon, 7 Aug 2023 06:01:21 -0500 From: MD Danish Anwar To: Randy Dunlap , Roger Quadros , Simon Horman , Vignesh Raghavendra , Andrew Lunn , Richard Cochran , Conor Dooley , Krzysztof Kozlowski , Rob Herring , Paolo Abeni , Jakub Kicinski , Eric Dumazet , "David S. Miller" , MD Danish Anwar CC: , , , , , , Subject: [PATCH v2 4/5] net: ti: icssg-prueth: add packet timestamping and ptp support Date: Mon, 7 Aug 2023 16:30:47 +0530 Message-ID: <20230807110048.2611456-5-danishanwar@ti.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230807110048.2611456-1-danishanwar@ti.com> References: <20230807110048.2611456-1-danishanwar@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org From: Roger Quadros Add packet timestamping TS and PTP PHC clock support. For AM65x and AM64x: - IEP1 is not used - IEP0 is configured in shadow mode with 1ms cycle and shared between Linux and FW. It provides time and TS in number cycles, so special conversation in ns is required. - IEP0 shared between PRUeth ports. - IEP0 supports PPS, periodic output. - IEP0 settime() and enabling PPS required FW interraction. - RX TS provided with each packet in CPPI5 descriptor. - TX TS returned through separate ICSSG hw queues for each port. TX TS readiness is signaled by INTC IRQ. Only one packet at time can be requested for TX TS. Signed-off-by: Roger Quadros Co-developed-by: Grygorii Strashko Signed-off-by: Grygorii Strashko Signed-off-by: Vignesh Raghavendra Signed-off-by: MD Danish Anwar --- drivers/net/ethernet/ti/icssg/icss_iep.c | 2 +- drivers/net/ethernet/ti/icssg/icss_iep.h | 3 +- drivers/net/ethernet/ti/icssg/icssg_ethtool.c | 21 + drivers/net/ethernet/ti/icssg/icssg_prueth.c | 416 +++++++++++++++++- drivers/net/ethernet/ti/icssg/icssg_prueth.h | 28 +- 5 files changed, 463 insertions(+), 7 deletions(-) diff --git a/drivers/net/ethernet/ti/icssg/icss_iep.c b/drivers/net/ethernet/ti/icssg/icss_iep.c index cc0ee113a2c5..455c803dea36 100644 --- a/drivers/net/ethernet/ti/icssg/icss_iep.c +++ b/drivers/net/ethernet/ti/icssg/icss_iep.c @@ -224,7 +224,7 @@ static u64 icss_iep_gettime(struct icss_iep *iep, unsigned long flags; if (iep->ops && iep->ops->gettime) - return iep->ops->gettime(iep->clockops_data); + return iep->ops->gettime(iep->clockops_data, sts); /* use local_irq_x() to make it work for both RT/non-RT */ local_irq_save(flags); diff --git a/drivers/net/ethernet/ti/icssg/icss_iep.h b/drivers/net/ethernet/ti/icssg/icss_iep.h index 4f9d4b6bb5d1..9c7f4d0a0916 100644 --- a/drivers/net/ethernet/ti/icssg/icss_iep.h +++ b/drivers/net/ethernet/ti/icssg/icss_iep.h @@ -13,12 +13,13 @@ #include struct icss_iep; +extern const struct icss_iep_clockops prueth_iep_clockops; /* Firmware specific clock operations */ struct icss_iep_clockops { void (*settime)(void *clockops_data, u64 ns); void (*adjtime)(void *clockops_data, s64 delta); - u64 (*gettime)(void *clockops_data); + u64 (*gettime)(void *clockops_data, struct ptp_system_timestamp *sts); int (*perout_enable)(void *clockops_data, struct ptp_perout_request *req, int on, u64 *cmp); diff --git a/drivers/net/ethernet/ti/icssg/icssg_ethtool.c b/drivers/net/ethernet/ti/icssg/icssg_ethtool.c index 02c312f01d10..a27ec1dcc8d5 100644 --- a/drivers/net/ethernet/ti/icssg/icssg_ethtool.c +++ b/drivers/net/ethernet/ti/icssg/icssg_ethtool.c @@ -109,6 +109,26 @@ static void emac_get_ethtool_stats(struct net_device *ndev, *(data++) = emac->stats[i]; } +static int emac_get_ts_info(struct net_device *ndev, + struct ethtool_ts_info *info) +{ + struct prueth_emac *emac = netdev_priv(ndev); + + info->so_timestamping = + SOF_TIMESTAMPING_TX_HARDWARE | + SOF_TIMESTAMPING_TX_SOFTWARE | + SOF_TIMESTAMPING_RX_HARDWARE | + SOF_TIMESTAMPING_RX_SOFTWARE | + SOF_TIMESTAMPING_SOFTWARE | + SOF_TIMESTAMPING_RAW_HARDWARE; + + info->phc_index = icss_iep_get_ptp_clock_idx(emac->iep); + info->tx_types = BIT(HWTSTAMP_TX_OFF) | BIT(HWTSTAMP_TX_ON); + info->rx_filters = BIT(HWTSTAMP_FILTER_NONE) | BIT(HWTSTAMP_FILTER_ALL); + + return 0; +} + static int emac_set_channels(struct net_device *ndev, struct ethtool_channels *ch) { @@ -176,6 +196,7 @@ const struct ethtool_ops icssg_ethtool_ops = { .get_sset_count = emac_get_sset_count, .get_ethtool_stats = emac_get_ethtool_stats, .get_strings = emac_get_strings, + .get_ts_info = emac_get_ts_info, .get_channels = emac_get_channels, .set_channels = emac_set_channels, .get_link_ksettings = emac_get_link_ksettings, diff --git a/drivers/net/ethernet/ti/icssg/icssg_prueth.c b/drivers/net/ethernet/ti/icssg/icssg_prueth.c index 47b941fb0198..b82a718fd602 100644 --- a/drivers/net/ethernet/ti/icssg/icssg_prueth.c +++ b/drivers/net/ethernet/ti/icssg/icssg_prueth.c @@ -56,6 +56,8 @@ /* 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) @@ -471,6 +473,37 @@ static int prueth_dma_rx_push(struct prueth_emac *emac, 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; @@ -480,6 +513,7 @@ static int emac_rx_packet(struct prueth_emac *emac, u32 flow_id) 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); @@ -497,6 +531,11 @@ static int emac_rx_packet(struct prueth_emac *emac, u32 flow_id) 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); @@ -557,6 +596,82 @@ static void prueth_rx_cleanup(void *data, dma_addr_t desc_dma) 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 timeout = 10; + int ret = 0; + u32 hi_sw; + u64 ns; + + if (!test_bit(__STATE_TX_TS_IN_PROGRESS, &emac->state)) { + netdev_err(emac->ndev, "unexpected TS response\n"); + return; + } + + skb = emac->tx_ts_skb; + while (timeout-- > 0) { + /* wait for response or timeout */ + ret = emac_get_tx_ts(emac, &tsr); + if (!ret) + break; + usleep_range(10, 20); + } + + if (ret) { + netdev_err(emac->ndev, "TX timestamp timeout\n"); + goto error; + } + + if (tsr.cookie != emac->tx_ts_cookie) { + netdev_err(emac->ndev, "TX TS cookie mismatch 0x%x:0x%x\n", + tsr.cookie, emac->tx_ts_cookie); + goto error; + } + + 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); + + emac->tx_ts_cookie++; + memset(&ssh, 0, sizeof(ssh)); + ssh.hwtstamp = ns_to_ktime(ns); + clear_bit_unlock(__STATE_TX_TS_IN_PROGRESS, &emac->state); + + skb_tstamp_tx(skb, &ssh); + dev_consume_skb_any(skb); + + return; + +error: + dev_kfree_skb_any(skb); + emac->tx_ts_skb = NULL; + clear_bit_unlock(__STATE_TX_TS_IN_PROGRESS, &emac->state); +} + /** * emac_ndo_start_xmit - EMAC Transmit function * @skb: SKB pointer @@ -577,6 +692,7 @@ static enum netdev_tx emac_ndo_start_xmit(struct sk_buff *skb, struct net_device struct prueth_tx_chn *tx_chn; dma_addr_t desc_dma, buf_dma; int i, ret = 0, q_idx; + bool in_tx_ts = 0; void **swdata; u32 pkt_len; u32 *epib; @@ -608,6 +724,19 @@ static enum netdev_tx emac_ndo_start_xmit(struct sk_buff *skb, struct net_device epib = first_desc->epib; epib[0] = 0; epib[1] = 0; + if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP && + emac->tx_ts_enabled) { + /* We currently support only one TX HW timestamp at a time */ + if (!test_and_set_bit_lock(__STATE_TX_TS_IN_PROGRESS, + &emac->state)) { + skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; + /* Request TX timestamp */ + epib[0] = emac->tx_ts_cookie; + epib[1] = 0x80000000; /* TX TS request */ + emac->tx_ts_skb = 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 @@ -629,7 +758,7 @@ static enum netdev_tx emac_ndo_start_xmit(struct sk_buff *skb, struct net_device if (!next_desc) { netdev_err(ndev, "tx: failed to allocate frag. descriptor\n"); - goto free_desc_stop_q_busy; + goto free_desc_stop_q_busy_cleanup_tx_ts; } buf_dma = skb_frag_dma_map(tx_chn->dma_dev, frag, 0, frag_size, @@ -638,7 +767,7 @@ static enum netdev_tx emac_ndo_start_xmit(struct sk_buff *skb, struct net_device 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 drop_free_descs; + goto cleanup_tx_ts; } cppi5_hdesc_reset_hbdesc(next_desc); @@ -682,6 +811,13 @@ static enum netdev_tx emac_ndo_start_xmit(struct sk_buff *skb, struct net_device return NETDEV_TX_OK; +cleanup_tx_ts: + if (in_tx_ts) { + dev_kfree_skb_any(emac->tx_ts_skb); + emac->tx_ts_skb = NULL; + clear_bit_unlock(__STATE_TX_TS_IN_PROGRESS, &emac->state); + } + drop_free_descs: prueth_xmit_free(tx_chn, first_desc); @@ -694,7 +830,12 @@ static enum netdev_tx emac_ndo_start_xmit(struct sk_buff *skb, struct net_device return ret; -free_desc_stop_q_busy: +free_desc_stop_q_busy_cleanup_tx_ts: + if (in_tx_ts) { + dev_kfree_skb_any(emac->tx_ts_skb); + emac->tx_ts_skb = NULL; + clear_bit_unlock(__STATE_TX_TS_IN_PROGRESS, &emac->state); + } prueth_xmit_free(tx_chn, first_desc); drop_stop_q_busy: @@ -717,6 +858,16 @@ static void prueth_tx_cleanup(void *data, dma_addr_t desc_dma) 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; @@ -992,6 +1143,139 @@ static int emac_phy_connect(struct prueth_emac *emac) 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 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); + + writel(0, 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 @@ -1066,10 +1350,20 @@ static int emac_ndo_open(struct net_device *ndev) 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 stop; + goto free_tx_ts_irq; ret = k3_udma_glue_enable_rx_chn(emac->rx_chns.rx_chn); if (ret) @@ -1102,6 +1396,8 @@ static int emac_ndo_open(struct net_device *ndev) 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: @@ -1173,6 +1469,14 @@ static int emac_ndo_stop(struct net_device *ndev) /* 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); @@ -1235,8 +1539,79 @@ 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); } @@ -1316,6 +1691,7 @@ static int prueth_netdev_init(struct prueth *prueth, 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); @@ -1355,6 +1731,15 @@ static int prueth_netdev_init(struct prueth *prueth, 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); @@ -1680,6 +2065,22 @@ static int prueth_probe(struct platform_device *pdev) 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"); + icss_iep_put(prueth->iep0); + prueth->iep0 = NULL; + prueth->iep1 = NULL; + goto free_pool; + } + /* setup netdev interfaces */ if (eth0_node) { ret = prueth_netdev_init(prueth, eth0_node); @@ -1688,6 +2089,7 @@ static int prueth_probe(struct platform_device *pdev) eth0_node->name); goto netdev_exit; } + prueth->emac[PRUETH_MAC0]->iep = prueth->iep0; } if (eth1_node) { @@ -1697,6 +2099,8 @@ static int prueth_probe(struct platform_device *pdev) eth1_node->name); goto netdev_exit; } + + prueth->emac[PRUETH_MAC1]->iep = prueth->iep0; } /* register the network devices */ @@ -1754,6 +2158,7 @@ static int prueth_probe(struct platform_device *pdev) prueth_netdev_exit(prueth, eth_node); } +free_pool: gen_pool_free(prueth->sram_pool, (unsigned long)prueth->msmcram.va, msmc_ram_size); @@ -1798,6 +2203,9 @@ static void prueth_remove(struct platform_device *pdev) prueth_netdev_exit(prueth, eth_node); } + icss_iep_put(prueth->iep1); + icss_iep_put(prueth->iep0); + gen_pool_free(prueth->sram_pool, (unsigned long)prueth->msmcram.va, MSMC_RAM_SIZE); diff --git a/drivers/net/ethernet/ti/icssg/icssg_prueth.h b/drivers/net/ethernet/ti/icssg/icssg_prueth.h index a8ce4d01ef16..67ddbff40108 100644 --- a/drivers/net/ethernet/ti/icssg/icssg_prueth.h +++ b/drivers/net/ethernet/ti/icssg/icssg_prueth.h @@ -35,6 +35,7 @@ #include #include "icssg_config.h" +#include "icss_iep.h" #include "icssg_switch_map.h" #define PRUETH_MAX_MTU (2000 - ETH_HLEN - ETH_FCS_LEN) @@ -117,6 +118,10 @@ struct prueth_rx_chn { char name[32]; }; +enum prueth_state_flags { + __STATE_TX_TS_IN_PROGRESS, +}; + /* There are 4 Tx DMA channels, but the highest priority is CH3 (thread 3) * and lower three are lower priority channels or threads. */ @@ -139,6 +144,9 @@ struct prueth_emac { struct device_node *phy_node; phy_interface_t phy_if; enum prueth_port port_id; + struct icss_iep *iep; + unsigned int rx_ts_enabled : 1; + unsigned int tx_ts_enabled : 1; /* DMA related */ struct prueth_tx_chn tx_chns[PRUETH_MAX_TX_QUEUES]; @@ -151,6 +159,14 @@ struct prueth_emac { spinlock_t lock; /* serialize access */ unsigned long state; + /* TX HW Timestamping */ + u32 tx_ts_cookie; + struct sk_buff *tx_ts_skb; + int tx_ts_irq; + + u8 cmd_seq; + /* shutdown related */ + u32 cmd_data[4]; struct completion cmd_complete; /* Mutex to serialize access to firmware command interface */ struct mutex cmd_lock; @@ -193,6 +209,8 @@ struct prueth_pdata { * @pdata: pointer to platform data for ICSSG driver * @icssg_hwcmdseq: seq counter or HWQ messages * @emacs_initialized: num of EMACs/ext ports that are up/running + * @iep0: pointer to IEP0 device + * @iep1: pointer to IEP1 device */ struct prueth { struct device *dev; @@ -214,8 +232,16 @@ struct prueth { struct platform_device *pdev; struct prueth_pdata pdata; u8 icssg_hwcmdseq; - int emacs_initialized; + struct icss_iep *iep0; + struct icss_iep *iep1; +}; + +struct emac_tx_ts_response { + u32 reserved[2]; + u32 cookie; + u32 lo_ts; + u32 hi_ts; }; /* get PRUSS SLICE number from prueth_emac */