From e04449488fdb1ed4d94a2bd1e7f24dfeed84d862 Mon Sep 17 00:00:00 2001 From: Selwin Sebastian Date: Tue, 9 Jun 2020 20:43:43 +0530 Subject: [PATCH] net/axgbe: support IEEE 1588 PTP Add ethdev APIs to support PTP timestamping Signed-off-by: Selwin Sebastian Acked-by: Amaranath Somalapuram --- drivers/net/axgbe/axgbe_common.h | 8 + drivers/net/axgbe/axgbe_ethdev.c | 338 +++++++++++++++++++++++++ drivers/net/axgbe/axgbe_ethdev.h | 14 + drivers/net/axgbe/axgbe_rxtx.c | 8 + drivers/net/axgbe/axgbe_rxtx_vec_sse.c | 8 +- 5 files changed, 375 insertions(+), 1 deletion(-) diff --git a/drivers/net/axgbe/axgbe_common.h b/drivers/net/axgbe/axgbe_common.h index d53b48ce6b..fb97f0b5b7 100644 --- a/drivers/net/axgbe/axgbe_common.h +++ b/drivers/net/axgbe/axgbe_common.h @@ -46,6 +46,7 @@ #endif #define AXGBE_HZ 250 +#define NSEC_PER_SEC 1000000000L /* DMA register offsets */ #define DMA_MR 0x3000 @@ -492,6 +493,8 @@ #define MAC_TSCR_TSEVNTENA_WIDTH 1 #define MAC_TSCR_TSINIT_INDEX 2 #define MAC_TSCR_TSINIT_WIDTH 1 +#define MAC_TSCR_TSUPDT_INDEX 3 +#define MAC_TSCR_TSUPDT_WIDTH 1 #define MAC_TSCR_TSIPENA_INDEX 11 #define MAC_TSCR_TSIPENA_WIDTH 1 #define MAC_TSCR_TSIPV4ENA_INDEX 13 @@ -506,6 +509,8 @@ #define MAC_TSCR_TXTSSTSM_WIDTH 1 #define MAC_TSSR_TXTSC_INDEX 15 #define MAC_TSSR_TXTSC_WIDTH 1 +#define MAC_STNUR_ADDSUB_INDEX 31 +#define MAC_STNUR_ADDSUB_WIDTH 1 #define MAC_TXSNR_TXTSSTSMIS_INDEX 31 #define MAC_TXSNR_TXTSSTSMIS_WIDTH 1 #define MAC_VLANHTR_VLHT_INDEX 0 @@ -539,6 +544,7 @@ #define MAC_VR_USERVER_INDEX 16 #define MAC_VR_USERVER_WIDTH 8 + /* MMC register offsets */ #define MMC_CR 0x0800 #define MMC_RISR 0x0804 @@ -1171,6 +1177,8 @@ #define RX_CONTEXT_DESC3_TSA_WIDTH 1 #define RX_CONTEXT_DESC3_TSD_INDEX 6 #define RX_CONTEXT_DESC3_TSD_WIDTH 1 +#define RX_CONTEXT_DESC3_PMT_INDEX 0 +#define RX_CONTEXT_DESC3_PMT_WIDTH 4 #define TX_PACKET_ATTRIBUTES_CSUM_ENABLE_INDEX 0 #define TX_PACKET_ATTRIBUTES_CSUM_ENABLE_WIDTH 1 diff --git a/drivers/net/axgbe/axgbe_ethdev.c b/drivers/net/axgbe/axgbe_ethdev.c index 02ceb95754..4f5a014b54 100644 --- a/drivers/net/axgbe/axgbe_ethdev.c +++ b/drivers/net/axgbe/axgbe_ethdev.c @@ -8,6 +8,7 @@ #include "axgbe_common.h" #include "axgbe_phy.h" #include "axgbe_regs.h" +#include "rte_time.h" static int eth_axgbe_dev_init(struct rte_eth_dev *eth_dev); static int eth_axgbe_dev_uninit(struct rte_eth_dev *eth_dev); @@ -85,6 +86,31 @@ static void axgbe_txq_info_get(struct rte_eth_dev *dev, uint16_t queue_id, const uint32_t *axgbe_dev_supported_ptypes_get(struct rte_eth_dev *dev); static int axgb_mtu_set(struct rte_eth_dev *dev, uint16_t mtu); +static int +axgbe_timesync_enable(struct rte_eth_dev *dev); +static int +axgbe_timesync_disable(struct rte_eth_dev *dev); +static int +axgbe_timesync_read_rx_timestamp(struct rte_eth_dev *dev, + struct timespec *timestamp, uint32_t flags); +static int +axgbe_timesync_read_tx_timestamp(struct rte_eth_dev *dev, + struct timespec *timestamp); +static int +axgbe_timesync_adjust_time(struct rte_eth_dev *dev, int64_t delta); +static int +axgbe_timesync_read_time(struct rte_eth_dev *dev, + struct timespec *timestamp); +static int +axgbe_timesync_write_time(struct rte_eth_dev *dev, + const struct timespec *timestamp); +static void +axgbe_set_tstamp_time(struct axgbe_port *pdata, unsigned int sec, + unsigned int nsec); +static void +axgbe_update_tstamp_addend(struct axgbe_port *pdata, + unsigned int addend); + struct axgbe_xstats { char name[RTE_ETH_XSTATS_NAME_SIZE]; int offset; @@ -225,6 +251,13 @@ static const struct eth_dev_ops axgbe_eth_dev_ops = { .txq_info_get = axgbe_txq_info_get, .dev_supported_ptypes_get = axgbe_dev_supported_ptypes_get, .mtu_set = axgb_mtu_set, + .timesync_enable = axgbe_timesync_enable, + .timesync_disable = axgbe_timesync_disable, + .timesync_read_rx_timestamp = axgbe_timesync_read_rx_timestamp, + .timesync_read_tx_timestamp = axgbe_timesync_read_tx_timestamp, + .timesync_adjust_time = axgbe_timesync_adjust_time, + .timesync_read_time = axgbe_timesync_read_time, + .timesync_write_time = axgbe_timesync_write_time, }; static int axgbe_phy_reset(struct axgbe_port *pdata) @@ -1395,6 +1428,7 @@ axgbe_dev_supported_ptypes_get(struct rte_eth_dev *dev) return ptypes; return NULL; } + static int axgb_mtu_set(struct rte_eth_dev *dev, uint16_t mtu) { struct rte_eth_dev_info dev_info; @@ -1424,6 +1458,310 @@ static int axgb_mtu_set(struct rte_eth_dev *dev, uint16_t mtu) dev->data->dev_conf.rxmode.max_rx_pkt_len = frame_size; return 0; } + +static void +axgbe_update_tstamp_time(struct axgbe_port *pdata, + unsigned int sec, unsigned int nsec, int addsub) +{ + unsigned int count = 100; + uint32_t sub_val = 0; + uint32_t sub_val_sec = 0xFFFFFFFF; + uint32_t sub_val_nsec = 0x3B9ACA00; + + if (addsub) { + if (sec) + sub_val = sub_val_sec - (sec - 1); + else + sub_val = sec; + + AXGMAC_IOWRITE(pdata, MAC_STSUR, sub_val); + sub_val = sub_val_nsec - nsec; + AXGMAC_IOWRITE(pdata, MAC_STNUR, sub_val); + AXGMAC_IOWRITE_BITS(pdata, MAC_STNUR, ADDSUB, 1); + } else { + AXGMAC_IOWRITE(pdata, MAC_STSUR, sec); + AXGMAC_IOWRITE_BITS(pdata, MAC_STNUR, ADDSUB, 0); + AXGMAC_IOWRITE(pdata, MAC_STNUR, nsec); + } + AXGMAC_IOWRITE_BITS(pdata, MAC_TSCR, TSUPDT, 1); + /* Wait for time update to complete */ + while (--count && AXGMAC_IOREAD_BITS(pdata, MAC_TSCR, TSUPDT)) + rte_delay_ms(1); +} + +static inline uint64_t +div_u64_rem(uint64_t dividend, uint32_t divisor, uint32_t *remainder) +{ + *remainder = dividend % divisor; + return dividend / divisor; +} + +static inline uint64_t +div_u64(uint64_t dividend, uint32_t divisor) +{ + uint32_t remainder; + return div_u64_rem(dividend, divisor, &remainder); +} + +static int +axgbe_adjfreq(struct axgbe_port *pdata, int64_t delta) +{ + uint64_t adjust; + uint32_t addend, diff; + unsigned int neg_adjust = 0; + + if (delta < 0) { + neg_adjust = 1; + delta = -delta; + } + adjust = (uint64_t)pdata->tstamp_addend; + adjust *= delta; + diff = (uint32_t)div_u64(adjust, 1000000000UL); + addend = (neg_adjust) ? pdata->tstamp_addend - diff : + pdata->tstamp_addend + diff; + pdata->tstamp_addend = addend; + axgbe_update_tstamp_addend(pdata, addend); + return 0; +} + +static int +axgbe_timesync_adjust_time(struct rte_eth_dev *dev, int64_t delta) +{ + struct axgbe_port *pdata = dev->data->dev_private; + struct timespec timestamp_delta; + + axgbe_adjfreq(pdata, delta); + pdata->systime_tc.nsec += delta; + + if (delta < 0) { + delta = -delta; + timestamp_delta = rte_ns_to_timespec(delta); + axgbe_update_tstamp_time(pdata, timestamp_delta.tv_sec, + timestamp_delta.tv_nsec, 1); + } else { + timestamp_delta = rte_ns_to_timespec(delta); + axgbe_update_tstamp_time(pdata, timestamp_delta.tv_sec, + timestamp_delta.tv_nsec, 0); + } + return 0; +} + +static int +axgbe_timesync_read_time(struct rte_eth_dev *dev, + struct timespec *timestamp) +{ + uint64_t nsec; + struct axgbe_port *pdata = dev->data->dev_private; + + nsec = AXGMAC_IOREAD(pdata, MAC_STSR); + nsec *= NSEC_PER_SEC; + nsec += AXGMAC_IOREAD(pdata, MAC_STNR); + *timestamp = rte_ns_to_timespec(nsec); + return 0; +} +static int +axgbe_timesync_write_time(struct rte_eth_dev *dev, + const struct timespec *timestamp) +{ + unsigned int count = 100; + struct axgbe_port *pdata = dev->data->dev_private; + + AXGMAC_IOWRITE(pdata, MAC_STSUR, timestamp->tv_sec); + AXGMAC_IOWRITE(pdata, MAC_STNUR, timestamp->tv_nsec); + AXGMAC_IOWRITE_BITS(pdata, MAC_TSCR, TSUPDT, 1); + /* Wait for time update to complete */ + while (--count && AXGMAC_IOREAD_BITS(pdata, MAC_TSCR, TSUPDT)) + rte_delay_ms(1); + if (!count) + PMD_DRV_LOG(ERR, "Timed out update timestamp\n"); + return 0; +} + +static void +axgbe_update_tstamp_addend(struct axgbe_port *pdata, + uint32_t addend) +{ + unsigned int count = 100; + + AXGMAC_IOWRITE(pdata, MAC_TSAR, addend); + AXGMAC_IOWRITE_BITS(pdata, MAC_TSCR, TSADDREG, 1); + + /* Wait for addend update to complete */ + while (--count && AXGMAC_IOREAD_BITS(pdata, MAC_TSCR, TSADDREG)) + rte_delay_ms(1); + if (!count) + PMD_DRV_LOG(ERR, "Timed out updating timestamp addend register\n"); +} + +static void +axgbe_set_tstamp_time(struct axgbe_port *pdata, unsigned int sec, + unsigned int nsec) +{ + unsigned int count = 100; + + /*System Time Sec Update*/ + AXGMAC_IOWRITE(pdata, MAC_STSUR, sec); + /*System Time nanoSec Update*/ + AXGMAC_IOWRITE(pdata, MAC_STNUR, nsec); + /*Initialize Timestamp*/ + AXGMAC_IOWRITE_BITS(pdata, MAC_TSCR, TSINIT, 1); + + /* Wait for time update to complete */ + while (--count && AXGMAC_IOREAD_BITS(pdata, MAC_TSCR, TSINIT)) + rte_delay_ms(1); + if (!count) + PMD_DRV_LOG(ERR, "Timed out initializing timestamp\n"); +} + +static int +axgbe_timesync_enable(struct rte_eth_dev *dev) +{ + struct axgbe_port *pdata = dev->data->dev_private; + unsigned int mac_tscr = 0; + uint64_t dividend; + struct timespec timestamp; + uint64_t nsec; + + /* Set one nano-second accuracy */ + AXGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSCTRLSSR, 1); + + /* Set fine timestamp update */ + AXGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSCFUPDT, 1); + + /* Overwrite earlier timestamps */ + AXGMAC_SET_BITS(mac_tscr, MAC_TSCR, TXTSSTSM, 1); + + AXGMAC_IOWRITE(pdata, MAC_TSCR, mac_tscr); + + /* Enabling processing of ptp over eth pkt */ + AXGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPENA, 1); + AXGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1); + /* Enable timestamp for all pkts*/ + AXGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENALL, 1); + + /* enabling timestamp */ + AXGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1); + AXGMAC_IOWRITE(pdata, MAC_TSCR, mac_tscr); + + /* Exit if timestamping is not enabled */ + if (!AXGMAC_GET_BITS(mac_tscr, MAC_TSCR, TSENA)) { + PMD_DRV_LOG(ERR, "Exiting as timestamp is not enabled\n"); + return 0; + } + + /* Sub-second Increment Value*/ + AXGMAC_IOWRITE_BITS(pdata, MAC_SSIR, SSINC, AXGBE_TSTAMP_SSINC); + /* Sub-nanosecond Increment Value */ + AXGMAC_IOWRITE_BITS(pdata, MAC_SSIR, SNSINC, AXGBE_TSTAMP_SNSINC); + + pdata->ptpclk_rate = AXGBE_V2_PTP_CLOCK_FREQ; + dividend = 50000000; + dividend <<= 32; + pdata->tstamp_addend = div_u64(dividend, pdata->ptpclk_rate); + + axgbe_update_tstamp_addend(pdata, pdata->tstamp_addend); + axgbe_set_tstamp_time(pdata, 0, 0); + + /* Initialize the timecounter */ + memset(&pdata->systime_tc, 0, sizeof(struct rte_timecounter)); + + pdata->systime_tc.cc_mask = AXGBE_CYCLECOUNTER_MASK; + pdata->systime_tc.cc_shift = 0; + pdata->systime_tc.nsec_mask = 0; + + PMD_DRV_LOG(DEBUG, "Initializing system time counter with realtime\n"); + + /* Updating the counter once with clock real time */ + clock_gettime(CLOCK_REALTIME, ×tamp); + nsec = rte_timespec_to_ns(×tamp); + nsec = rte_timecounter_update(&pdata->systime_tc, nsec); + axgbe_set_tstamp_time(pdata, timestamp.tv_sec, timestamp.tv_nsec); + return 0; +} + +static int +axgbe_timesync_disable(struct rte_eth_dev *dev) +{ + struct axgbe_port *pdata = dev->data->dev_private; + unsigned int mac_tscr = 0; + + /*disable timestamp for all pkts*/ + AXGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENALL, 0); + /*disable the addened register*/ + AXGMAC_IOWRITE_BITS(pdata, MAC_TSCR, TSADDREG, 0); + /* disable timestamp update */ + AXGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSCFUPDT, 0); + /*disable time stamp*/ + AXGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 0); + return 0; +} + +static int +axgbe_timesync_read_rx_timestamp(struct rte_eth_dev *dev, + struct timespec *timestamp, uint32_t flags) +{ + uint64_t nsec = 0; + volatile union axgbe_rx_desc *desc; + uint16_t idx, pmt; + struct axgbe_rx_queue *rxq = *dev->data->rx_queues; + + idx = AXGBE_GET_DESC_IDX(rxq, rxq->cur); + desc = &rxq->desc[idx]; + + while (AXGMAC_GET_BITS_LE(desc->write.desc3, RX_NORMAL_DESC3, OWN)) + rte_delay_ms(1); + if (AXGMAC_GET_BITS_LE(desc->write.desc3, RX_NORMAL_DESC3, CTXT)) { + if (AXGMAC_GET_BITS_LE(desc->write.desc3, RX_CONTEXT_DESC3, TSA) && + !AXGMAC_GET_BITS_LE(desc->write.desc3, + RX_CONTEXT_DESC3, TSD)) { + pmt = AXGMAC_GET_BITS_LE(desc->write.desc3, + RX_CONTEXT_DESC3, PMT); + nsec = rte_le_to_cpu_32(desc->write.desc1); + nsec *= NSEC_PER_SEC; + nsec += rte_le_to_cpu_32(desc->write.desc0); + if (nsec != 0xffffffffffffffffULL) { + if (pmt == 0x01) + *timestamp = rte_ns_to_timespec(nsec); + PMD_DRV_LOG(DEBUG, + "flags = 0x%x nsec = %"PRIu64"\n", + flags, nsec); + } + } + } + + return 0; +} + +static int +axgbe_timesync_read_tx_timestamp(struct rte_eth_dev *dev, + struct timespec *timestamp) +{ + uint64_t nsec; + struct axgbe_port *pdata = dev->data->dev_private; + unsigned int tx_snr, tx_ssr; + + rte_delay_us(5); + if (pdata->vdata->tx_tstamp_workaround) { + tx_snr = AXGMAC_IOREAD(pdata, MAC_TXSNR); + tx_ssr = AXGMAC_IOREAD(pdata, MAC_TXSSR); + + } else { + tx_ssr = AXGMAC_IOREAD(pdata, MAC_TXSSR); + tx_snr = AXGMAC_IOREAD(pdata, MAC_TXSNR); + } + if (AXGMAC_GET_BITS(tx_snr, MAC_TXSNR, TXTSSTSMIS)) { + PMD_DRV_LOG(DEBUG, "Waiting for TXTSSTSMIS\n"); + return 0; + } + nsec = tx_ssr; + nsec *= NSEC_PER_SEC; + nsec += tx_snr; + PMD_DRV_LOG(DEBUG, "nsec = %"PRIu64" tx_ssr = %d tx_snr = %d\n", + nsec, tx_ssr, tx_snr); + *timestamp = rte_ns_to_timespec(nsec); + return 0; +} + static void axgbe_get_all_hw_features(struct axgbe_port *pdata) { unsigned int mac_hfr0, mac_hfr1, mac_hfr2; diff --git a/drivers/net/axgbe/axgbe_ethdev.h b/drivers/net/axgbe/axgbe_ethdev.h index bb759ffe35..35a8476466 100644 --- a/drivers/net/axgbe/axgbe_ethdev.h +++ b/drivers/net/axgbe/axgbe_ethdev.h @@ -9,6 +9,7 @@ #include #include #include "axgbe_common.h" +#include "rte_time.h" #define IRQ 0xff #define VLAN_HLEN 4 @@ -63,6 +64,13 @@ #define AXGBE_V2_DMA_CLOCK_FREQ 500000000 #define AXGBE_V2_PTP_CLOCK_FREQ 125000000 +/* Timestamp support - values based on 50MHz PTP clock + * 50MHz => 20 nsec + */ +#define AXGBE_TSTAMP_SSINC 20 +#define AXGBE_TSTAMP_SNSINC 0 +#define AXGBE_CYCLECOUNTER_MASK 0xffffffffffffffffULL + #define AXGMAC_FIFO_MIN_ALLOC 2048 #define AXGMAC_FIFO_UNIT 256 #define AXGMAC_FIFO_ALIGN(_x) \ @@ -645,6 +653,12 @@ struct axgbe_port { unsigned int hash_table_count; unsigned int uc_hash_mac_addr; unsigned int uc_hash_table[AXGBE_MAC_HASH_TABLE_SIZE]; + + /* For IEEE1588 PTP */ + struct rte_timecounter systime_tc; + struct rte_timecounter tx_tstamp; + unsigned int tstamp_addend; + }; void axgbe_init_function_ptrs_dev(struct axgbe_hw_if *hw_if); diff --git a/drivers/net/axgbe/axgbe_rxtx.c b/drivers/net/axgbe/axgbe_rxtx.c index da3a9822b8..bc93becaa5 100644 --- a/drivers/net/axgbe/axgbe_rxtx.c +++ b/drivers/net/axgbe/axgbe_rxtx.c @@ -275,6 +275,10 @@ axgbe_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, /* Get the RSS hash */ if (AXGMAC_GET_BITS_LE(desc->write.desc3, RX_NORMAL_DESC3, RSV)) mbuf->hash.rss = rte_le_to_cpu_32(desc->write.desc1); + /* Indicate if a Context Descriptor is next */ + if (AXGMAC_GET_BITS_LE(desc->write.desc3, RX_NORMAL_DESC3, CDA)) + mbuf->ol_flags |= PKT_RX_IEEE1588_PTP + | PKT_RX_IEEE1588_TMST; pkt_len = AXGMAC_GET_BITS_LE(desc->write.desc3, RX_NORMAL_DESC3, PL) - rxq->crc_len; /* Mbuf populate */ @@ -722,6 +726,10 @@ static int axgbe_xmit_hw(struct axgbe_tx_queue *txq, /* Total msg length to transmit */ AXGMAC_SET_BITS_LE(desc->desc3, TX_NORMAL_DESC3, FL, mbuf->pkt_len); + /* Timestamp enablement check */ + if (mbuf->ol_flags & PKT_TX_IEEE1588_TMST) + AXGMAC_SET_BITS_LE(desc->desc2, TX_NORMAL_DESC2, TTSE, 1); + rte_wmb(); /* Mark it as First and Last Descriptor */ AXGMAC_SET_BITS_LE(desc->desc3, TX_NORMAL_DESC3, FD, 1); AXGMAC_SET_BITS_LE(desc->desc3, TX_NORMAL_DESC3, LD, 1); diff --git a/drivers/net/axgbe/axgbe_rxtx_vec_sse.c b/drivers/net/axgbe/axgbe_rxtx_vec_sse.c index 9be7037136..1c962b9333 100644 --- a/drivers/net/axgbe/axgbe_rxtx_vec_sse.c +++ b/drivers/net/axgbe/axgbe_rxtx_vec_sse.c @@ -13,6 +13,7 @@ /* Useful to avoid shifting for every descriptor prepration*/ #define TX_DESC_CTRL_FLAGS 0xb000000000000000 +#define TX_DESC_CTRL_FLAG_TMST 0x40000000 #define TX_FREE_BULK 8 #define TX_FREE_BULK_CHECK (TX_FREE_BULK - 1) @@ -20,8 +21,13 @@ static inline void axgbe_vec_tx(volatile struct axgbe_tx_desc *desc, struct rte_mbuf *mbuf) { + uint64_t tmst_en = 0; + /* Timestamp enablement check */ + if (mbuf->ol_flags & PKT_TX_IEEE1588_TMST) + tmst_en = TX_DESC_CTRL_FLAG_TMST; __m128i descriptor = _mm_set_epi64x((uint64_t)mbuf->pkt_len << 32 | - TX_DESC_CTRL_FLAGS | mbuf->data_len, + TX_DESC_CTRL_FLAGS | mbuf->data_len + | tmst_en, mbuf->buf_iova + mbuf->data_off); _mm_store_si128((__m128i *)desc, descriptor);