From 04a1839950d92ab6519479bc95710e89ae6cbc77 Mon Sep 17 00:00:00 2001 From: Egor Pomozov Date: Tue, 22 Oct 2019 09:53:35 +0000 Subject: [PATCH] net: aquantia: implement data PTP datapath Here we do alloc/free IRQs for PTP rings. We also implement processing of PTP packets on TX and RX sides. Signed-off-by: Egor Pomozov Co-developed-by: Sergey Samoilenko Signed-off-by: Sergey Samoilenko Co-developed-by: Dmitry Bezrukov Signed-off-by: Dmitry Bezrukov Signed-off-by: Igor Russkikh Signed-off-by: David S. Miller --- .../net/ethernet/aquantia/atlantic/aq_cfg.h | 4 +- .../net/ethernet/aquantia/atlantic/aq_hw.h | 12 + .../net/ethernet/aquantia/atlantic/aq_main.c | 23 +- .../net/ethernet/aquantia/atlantic/aq_nic.c | 18 +- .../net/ethernet/aquantia/atlantic/aq_nic.h | 3 + .../ethernet/aquantia/atlantic/aq_pci_func.c | 5 +- .../net/ethernet/aquantia/atlantic/aq_ptp.c | 534 +++++++++++++++++- .../net/ethernet/aquantia/atlantic/aq_ptp.h | 19 + .../net/ethernet/aquantia/atlantic/aq_ring.c | 31 +- .../net/ethernet/aquantia/atlantic/aq_ring.h | 1 + .../aquantia/atlantic/hw_atl/hw_atl_b0.c | 100 ++++ 11 files changed, 738 insertions(+), 12 deletions(-) diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_cfg.h b/drivers/net/ethernet/aquantia/atlantic/aq_cfg.h index 02f1b70c4e25..8c633caf79d2 100644 --- a/drivers/net/ethernet/aquantia/atlantic/aq_cfg.h +++ b/drivers/net/ethernet/aquantia/atlantic/aq_cfg.h @@ -1,7 +1,7 @@ /* SPDX-License-Identifier: GPL-2.0-only */ /* * aQuantia Corporation Network Driver - * Copyright (C) 2014-2017 aQuantia Corporation. All rights reserved + * Copyright (C) 2014-2019 aQuantia Corporation. All rights reserved */ /* File aq_cfg.h: Definition of configuration parameters and constants. */ @@ -27,7 +27,7 @@ #define AQ_CFG_INTERRUPT_MODERATION_USEC_MAX (0x1FF * 2) -#define AQ_CFG_IRQ_MASK 0x1FFU +#define AQ_CFG_IRQ_MASK 0x3FFU #define AQ_CFG_VECS_MAX 8U #define AQ_CFG_TCS_MAX 8U diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_hw.h b/drivers/net/ethernet/aquantia/atlantic/aq_hw.h index edc7d83ef5e1..5b0f42818033 100644 --- a/drivers/net/ethernet/aquantia/atlantic/aq_hw.h +++ b/drivers/net/ethernet/aquantia/atlantic/aq_hw.h @@ -244,6 +244,12 @@ struct aq_hw_ops { int (*hw_rx_tc_mode_get)(struct aq_hw_s *self, u32 *tc_mode); + int (*hw_ring_hwts_rx_fill)(struct aq_hw_s *self, + struct aq_ring_s *aq_ring); + + int (*hw_ring_hwts_rx_receive)(struct aq_hw_s *self, + struct aq_ring_s *ring); + void (*hw_get_ptp_ts)(struct aq_hw_s *self, u64 *stamp); int (*hw_adj_clock_freq)(struct aq_hw_s *self, s32 delta); @@ -252,6 +258,12 @@ struct aq_hw_ops { int (*hw_set_sys_clock)(struct aq_hw_s *self, u64 time, u64 ts); + u16 (*rx_extract_ts)(struct aq_hw_s *self, u8 *p, unsigned int len, + u64 *timestamp); + + int (*extract_hwts)(struct aq_hw_s *self, u8 *p, unsigned int len, + u64 *timestamp); + int (*hw_set_fc)(struct aq_hw_s *self, u32 fc, u32 tc); }; diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_main.c b/drivers/net/ethernet/aquantia/atlantic/aq_main.c index bb65dd39f847..f630032af8e1 100644 --- a/drivers/net/ethernet/aquantia/atlantic/aq_main.c +++ b/drivers/net/ethernet/aquantia/atlantic/aq_main.c @@ -1,7 +1,7 @@ // SPDX-License-Identifier: GPL-2.0-only /* * aQuantia Corporation Network Driver - * Copyright (C) 2014-2017 aQuantia Corporation. All rights reserved + * Copyright (C) 2014-2019 aQuantia Corporation. All rights reserved */ /* File aq_main.c: Main file for aQuantia Linux driver. */ @@ -10,10 +10,13 @@ #include "aq_nic.h" #include "aq_pci_func.h" #include "aq_ethtool.h" +#include "aq_ptp.h" #include "aq_filters.h" #include #include +#include +#include MODULE_LICENSE("GPL v2"); MODULE_VERSION(AQ_CFG_DRV_VERSION); @@ -93,6 +96,24 @@ static int aq_ndev_start_xmit(struct sk_buff *skb, struct net_device *ndev) { struct aq_nic_s *aq_nic = netdev_priv(ndev); + if (unlikely(aq_utils_obj_test(&aq_nic->flags, AQ_NIC_PTP_DPATH_UP))) { + /* Hardware adds the Timestamp for PTPv2 802.AS1 + * and PTPv2 IPv4 UDP. + * We have to push even general 320 port messages to the ptp + * queue explicitly. This is a limitation of current firmware + * and hardware PTP design of the chip. Otherwise ptp stream + * will fail to sync + */ + if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) || + unlikely((ip_hdr(skb)->version == 4) && + (ip_hdr(skb)->protocol == IPPROTO_UDP) && + ((udp_hdr(skb)->dest == htons(319)) || + (udp_hdr(skb)->dest == htons(320)))) || + unlikely(eth_hdr(skb)->h_proto == htons(ETH_P_1588))) + return aq_ptp_xmit(aq_nic, skb); + } + + skb_tx_timestamp(skb); return aq_nic_xmit(aq_nic, skb); } diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c index ecca2c4cf140..65384f45805f 100644 --- a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c +++ b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c @@ -146,8 +146,11 @@ static int aq_nic_update_link_status(struct aq_nic_s *self) self->aq_hw->aq_link_status.mbps); aq_nic_update_interrupt_moderation_settings(self); - if (self->aq_ptp) + if (self->aq_ptp) { aq_ptp_clock_init(self); + aq_ptp_tm_offset_set(self, + self->aq_hw->aq_link_status.mbps); + } /* Driver has to update flow control settings on RX block * on any link event. @@ -196,6 +199,8 @@ static void aq_nic_service_task(struct work_struct *work) service_task); int err; + aq_ptp_service_task(self); + if (aq_utils_obj_test(&self->flags, AQ_NIC_FLAGS_IS_NOT_READY)) return; @@ -408,6 +413,10 @@ int aq_nic_start(struct aq_nic_s *self) goto err_exit; } + err = aq_ptp_irq_alloc(self); + if (err < 0) + goto err_exit; + if (self->aq_nic_cfg.link_irq_vec) { int irqvec = pci_irq_vector(self->pdev, self->aq_nic_cfg.link_irq_vec); @@ -440,9 +449,8 @@ int aq_nic_start(struct aq_nic_s *self) return err; } -static unsigned int aq_nic_map_skb(struct aq_nic_s *self, - struct sk_buff *skb, - struct aq_ring_s *ring) +unsigned int aq_nic_map_skb(struct aq_nic_s *self, struct sk_buff *skb, + struct aq_ring_s *ring) { unsigned int ret = 0U; unsigned int nr_frags = skb_shinfo(skb)->nr_frags; @@ -973,6 +981,8 @@ int aq_nic_stop(struct aq_nic_s *self) else aq_pci_func_free_irqs(self); + aq_ptp_irq_free(self); + for (i = 0U, aq_vec = self->aq_vec[0]; self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i]) aq_vec_stop(aq_vec); diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_nic.h b/drivers/net/ethernet/aquantia/atlantic/aq_nic.h index d0979bba7ed3..576432adda4c 100644 --- a/drivers/net/ethernet/aquantia/atlantic/aq_nic.h +++ b/drivers/net/ethernet/aquantia/atlantic/aq_nic.h @@ -54,6 +54,7 @@ struct aq_nic_cfg_s { #define AQ_NIC_FLAG_STOPPING 0x00000008U #define AQ_NIC_FLAG_RESETTING 0x00000010U #define AQ_NIC_FLAG_CLOSING 0x00000020U +#define AQ_NIC_PTP_DPATH_UP 0x02000000U #define AQ_NIC_LINK_DOWN 0x04000000U #define AQ_NIC_FLAG_ERR_UNPLUG 0x40000000U #define AQ_NIC_FLAG_ERR_HW 0x80000000U @@ -129,6 +130,8 @@ void aq_nic_cfg_start(struct aq_nic_s *self); int aq_nic_ndev_register(struct aq_nic_s *self); void aq_nic_ndev_free(struct aq_nic_s *self); int aq_nic_start(struct aq_nic_s *self); +unsigned int aq_nic_map_skb(struct aq_nic_s *self, struct sk_buff *skb, + struct aq_ring_s *ring); int aq_nic_xmit(struct aq_nic_s *self, struct sk_buff *skb); int aq_nic_get_regs(struct aq_nic_s *self, struct ethtool_regs *regs, void *p); int aq_nic_get_regs_count(struct aq_nic_s *self); diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c b/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c index 74b9f3f1da81..e82c96b50373 100644 --- a/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c +++ b/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c @@ -1,7 +1,7 @@ // SPDX-License-Identifier: GPL-2.0-only /* * aQuantia Corporation Network Driver - * Copyright (C) 2014-2017 aQuantia Corporation. All rights reserved + * Copyright (C) 2014-2019 aQuantia Corporation. All rights reserved */ /* File aq_pci_func.c: Definition of PCI functions. */ @@ -269,6 +269,9 @@ static int aq_pci_probe(struct pci_dev *pdev, numvecs = min((u8)AQ_CFG_VECS_DEF, aq_nic_get_cfg(self)->aq_hw_caps->msix_irqs); numvecs = min(numvecs, num_online_cpus()); + /* Request IRQ vector for PTP */ + numvecs += 1; + numvecs += AQ_HW_SERVICE_IRQS; /*enable interrupts */ #if !AQ_CFG_FORCE_LEGACY_INT diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_ptp.c b/drivers/net/ethernet/aquantia/atlantic/aq_ptp.c index f2fd0ca14a49..fbb1912a34d7 100644 --- a/drivers/net/ethernet/aquantia/atlantic/aq_ptp.c +++ b/drivers/net/ethernet/aquantia/atlantic/aq_ptp.c @@ -8,12 +8,24 @@ */ #include +#include #include #include "aq_nic.h" #include "aq_ptp.h" #include "aq_ring.h" +#define AQ_PTP_TX_TIMEOUT (HZ * 10) + +enum ptp_speed_offsets { + ptp_offset_idx_10 = 0, + ptp_offset_idx_100, + ptp_offset_idx_1000, + ptp_offset_idx_2500, + ptp_offset_idx_5000, + ptp_offset_idx_10000, +}; + struct ptp_skb_ring { struct sk_buff **buff; spinlock_t lock; @@ -22,6 +34,12 @@ struct ptp_skb_ring { unsigned int tail; }; +struct ptp_tx_timeout { + spinlock_t lock; + bool active; + unsigned long tx_start; +}; + struct aq_ptp_s { struct aq_nic_s *aq_nic; spinlock_t ptp_lock; @@ -29,8 +47,16 @@ struct aq_ptp_s { struct ptp_clock *ptp_clock; struct ptp_clock_info ptp_info; + atomic_t offset_egress; + atomic_t offset_ingress; + struct aq_ring_param_s ptp_ring_param; + struct ptp_tx_timeout ptp_tx_timeout; + + unsigned int idx_vector; + struct napi_struct napi; + struct aq_ring_s ptp_tx; struct aq_ring_s ptp_rx; struct aq_ring_s hwts_rx; @@ -38,6 +64,101 @@ struct aq_ptp_s { struct ptp_skb_ring skb_ring; }; +struct ptp_tm_offset { + unsigned int mbps; + int egress; + int ingress; +}; + +static struct ptp_tm_offset ptp_offset[6]; + +void aq_ptp_tm_offset_set(struct aq_nic_s *aq_nic, unsigned int mbps) +{ + struct aq_ptp_s *aq_ptp = aq_nic->aq_ptp; + int i, egress, ingress; + + if (!aq_ptp) + return; + + egress = 0; + ingress = 0; + + for (i = 0; i < ARRAY_SIZE(ptp_offset); i++) { + if (mbps == ptp_offset[i].mbps) { + egress = ptp_offset[i].egress; + ingress = ptp_offset[i].ingress; + break; + } + } + + atomic_set(&aq_ptp->offset_egress, egress); + atomic_set(&aq_ptp->offset_ingress, ingress); +} + +static int __aq_ptp_skb_put(struct ptp_skb_ring *ring, struct sk_buff *skb) +{ + unsigned int next_head = (ring->head + 1) % ring->size; + + if (next_head == ring->tail) + return -ENOMEM; + + ring->buff[ring->head] = skb_get(skb); + ring->head = next_head; + + return 0; +} + +static int aq_ptp_skb_put(struct ptp_skb_ring *ring, struct sk_buff *skb) +{ + unsigned long flags; + int ret; + + spin_lock_irqsave(&ring->lock, flags); + ret = __aq_ptp_skb_put(ring, skb); + spin_unlock_irqrestore(&ring->lock, flags); + + return ret; +} + +static struct sk_buff *__aq_ptp_skb_get(struct ptp_skb_ring *ring) +{ + struct sk_buff *skb; + + if (ring->tail == ring->head) + return NULL; + + skb = ring->buff[ring->tail]; + ring->tail = (ring->tail + 1) % ring->size; + + return skb; +} + +static struct sk_buff *aq_ptp_skb_get(struct ptp_skb_ring *ring) +{ + unsigned long flags; + struct sk_buff *skb; + + spin_lock_irqsave(&ring->lock, flags); + skb = __aq_ptp_skb_get(ring); + spin_unlock_irqrestore(&ring->lock, flags); + + return skb; +} + +static unsigned int aq_ptp_skb_buf_len(struct ptp_skb_ring *ring) +{ + unsigned long flags; + unsigned int len; + + spin_lock_irqsave(&ring->lock, flags); + len = (ring->head >= ring->tail) ? + ring->head - ring->tail : + ring->size - ring->tail + ring->head; + spin_unlock_irqrestore(&ring->lock, flags); + + return len; +} + static int aq_ptp_skb_ring_init(struct ptp_skb_ring *ring, unsigned int size) { struct sk_buff **buff = kmalloc(sizeof(*buff) * size, GFP_KERNEL); @@ -55,10 +176,75 @@ static int aq_ptp_skb_ring_init(struct ptp_skb_ring *ring, unsigned int size) return 0; } +static void aq_ptp_skb_ring_clean(struct ptp_skb_ring *ring) +{ + struct sk_buff *skb; + + while ((skb = aq_ptp_skb_get(ring)) != NULL) + dev_kfree_skb_any(skb); +} + static void aq_ptp_skb_ring_release(struct ptp_skb_ring *ring) { - kfree(ring->buff); - ring->buff = NULL; + if (ring->buff) { + aq_ptp_skb_ring_clean(ring); + kfree(ring->buff); + ring->buff = NULL; + } +} + +static void aq_ptp_tx_timeout_init(struct ptp_tx_timeout *timeout) +{ + spin_lock_init(&timeout->lock); + timeout->active = false; +} + +static void aq_ptp_tx_timeout_start(struct aq_ptp_s *aq_ptp) +{ + struct ptp_tx_timeout *timeout = &aq_ptp->ptp_tx_timeout; + unsigned long flags; + + spin_lock_irqsave(&timeout->lock, flags); + timeout->active = true; + timeout->tx_start = jiffies; + spin_unlock_irqrestore(&timeout->lock, flags); +} + +static void aq_ptp_tx_timeout_update(struct aq_ptp_s *aq_ptp) +{ + if (!aq_ptp_skb_buf_len(&aq_ptp->skb_ring)) { + struct ptp_tx_timeout *timeout = &aq_ptp->ptp_tx_timeout; + unsigned long flags; + + spin_lock_irqsave(&timeout->lock, flags); + timeout->active = false; + spin_unlock_irqrestore(&timeout->lock, flags); + } +} + +static void aq_ptp_tx_timeout_check(struct aq_ptp_s *aq_ptp) +{ + struct ptp_tx_timeout *timeout = &aq_ptp->ptp_tx_timeout; + unsigned long flags; + bool timeout_flag; + + timeout_flag = false; + + spin_lock_irqsave(&timeout->lock, flags); + if (timeout->active) { + timeout_flag = time_is_before_jiffies(timeout->tx_start + + AQ_PTP_TX_TIMEOUT); + /* reset active flag if timeout detected */ + if (timeout_flag) + timeout->active = false; + } + spin_unlock_irqrestore(&timeout->lock, flags); + + if (timeout_flag) { + aq_ptp_skb_ring_clean(&aq_ptp->skb_ring); + netdev_err(aq_ptp->aq_nic->ndev, + "PTP Timeout. Clearing Tx Timestamp SKBs\n"); + } } /* aq_ptp_adjfine @@ -148,6 +334,263 @@ static int aq_ptp_settime(struct ptp_clock_info *ptp, return 0; } +static void aq_ptp_convert_to_hwtstamp(struct aq_ptp_s *aq_ptp, + struct skb_shared_hwtstamps *hwtstamp, + u64 timestamp) +{ + memset(hwtstamp, 0, sizeof(*hwtstamp)); + hwtstamp->hwtstamp = ns_to_ktime(timestamp); +} + +/* aq_ptp_tx_hwtstamp - utility function which checks for TX time stamp + * @adapter: the private adapter struct + * + * if the timestamp is valid, we convert it into the timecounter ns + * value, then store that result into the hwtstamps structure which + * is passed up the network stack + */ +void aq_ptp_tx_hwtstamp(struct aq_nic_s *aq_nic, u64 timestamp) +{ + struct aq_ptp_s *aq_ptp = aq_nic->aq_ptp; + struct sk_buff *skb = aq_ptp_skb_get(&aq_ptp->skb_ring); + struct skb_shared_hwtstamps hwtstamp; + + if (!skb) { + netdev_err(aq_nic->ndev, "have timestamp but tx_queus empty\n"); + return; + } + + timestamp += atomic_read(&aq_ptp->offset_egress); + aq_ptp_convert_to_hwtstamp(aq_ptp, &hwtstamp, timestamp); + skb_tstamp_tx(skb, &hwtstamp); + dev_kfree_skb_any(skb); + + aq_ptp_tx_timeout_update(aq_ptp); +} + +/* aq_ptp_rx_hwtstamp - utility function which checks for RX time stamp + * @adapter: pointer to adapter struct + * @skb: particular skb to send timestamp with + * + * if the timestamp is valid, we convert it into the timecounter ns + * value, then store that result into the hwtstamps structure which + * is passed up the network stack + */ +static void aq_ptp_rx_hwtstamp(struct aq_ptp_s *aq_ptp, struct sk_buff *skb, + u64 timestamp) +{ + timestamp -= atomic_read(&aq_ptp->offset_ingress); + aq_ptp_convert_to_hwtstamp(aq_ptp, skb_hwtstamps(skb), timestamp); +} + +bool aq_ptp_ring(struct aq_nic_s *aq_nic, struct aq_ring_s *ring) +{ + struct aq_ptp_s *aq_ptp = aq_nic->aq_ptp; + + if (!aq_ptp) + return false; + + return &aq_ptp->ptp_tx == ring || + &aq_ptp->ptp_rx == ring || &aq_ptp->hwts_rx == ring; +} + +u16 aq_ptp_extract_ts(struct aq_nic_s *aq_nic, struct sk_buff *skb, u8 *p, + unsigned int len) +{ + struct aq_ptp_s *aq_ptp = aq_nic->aq_ptp; + u64 timestamp = 0; + u16 ret = aq_nic->aq_hw_ops->rx_extract_ts(aq_nic->aq_hw, + p, len, ×tamp); + + if (ret > 0) + aq_ptp_rx_hwtstamp(aq_ptp, skb, timestamp); + + return ret; +} + +static int aq_ptp_poll(struct napi_struct *napi, int budget) +{ + struct aq_ptp_s *aq_ptp = container_of(napi, struct aq_ptp_s, napi); + struct aq_nic_s *aq_nic = aq_ptp->aq_nic; + bool was_cleaned = false; + int work_done = 0; + int err; + + /* Processing PTP TX traffic */ + err = aq_nic->aq_hw_ops->hw_ring_tx_head_update(aq_nic->aq_hw, + &aq_ptp->ptp_tx); + if (err < 0) + goto err_exit; + + if (aq_ptp->ptp_tx.sw_head != aq_ptp->ptp_tx.hw_head) { + aq_ring_tx_clean(&aq_ptp->ptp_tx); + + was_cleaned = true; + } + + /* Processing HW_TIMESTAMP RX traffic */ + err = aq_nic->aq_hw_ops->hw_ring_hwts_rx_receive(aq_nic->aq_hw, + &aq_ptp->hwts_rx); + if (err < 0) + goto err_exit; + + if (aq_ptp->hwts_rx.sw_head != aq_ptp->hwts_rx.hw_head) { + aq_ring_hwts_rx_clean(&aq_ptp->hwts_rx, aq_nic); + + err = aq_nic->aq_hw_ops->hw_ring_hwts_rx_fill(aq_nic->aq_hw, + &aq_ptp->hwts_rx); + + was_cleaned = true; + } + + /* Processing PTP RX traffic */ + err = aq_nic->aq_hw_ops->hw_ring_rx_receive(aq_nic->aq_hw, + &aq_ptp->ptp_rx); + if (err < 0) + goto err_exit; + + if (aq_ptp->ptp_rx.sw_head != aq_ptp->ptp_rx.hw_head) { + unsigned int sw_tail_old; + + err = aq_ring_rx_clean(&aq_ptp->ptp_rx, napi, &work_done, budget); + if (err < 0) + goto err_exit; + + sw_tail_old = aq_ptp->ptp_rx.sw_tail; + err = aq_ring_rx_fill(&aq_ptp->ptp_rx); + if (err < 0) + goto err_exit; + + err = aq_nic->aq_hw_ops->hw_ring_rx_fill(aq_nic->aq_hw, + &aq_ptp->ptp_rx, + sw_tail_old); + if (err < 0) + goto err_exit; + } + + if (was_cleaned) + work_done = budget; + + if (work_done < budget) { + napi_complete_done(napi, work_done); + aq_nic->aq_hw_ops->hw_irq_enable(aq_nic->aq_hw, + 1 << aq_ptp->ptp_ring_param.vec_idx); + } + +err_exit: + return work_done; +} + +static irqreturn_t aq_ptp_isr(int irq, void *private) +{ + struct aq_ptp_s *aq_ptp = private; + int err = 0; + + if (!aq_ptp) { + err = -EINVAL; + goto err_exit; + } + napi_schedule(&aq_ptp->napi); + +err_exit: + return err >= 0 ? IRQ_HANDLED : IRQ_NONE; +} + +int aq_ptp_xmit(struct aq_nic_s *aq_nic, struct sk_buff *skb) +{ + struct aq_ptp_s *aq_ptp = aq_nic->aq_ptp; + struct aq_ring_s *ring = &aq_ptp->ptp_tx; + unsigned long irq_flags; + int err = NETDEV_TX_OK; + unsigned int frags; + + if (skb->len <= 0) { + dev_kfree_skb_any(skb); + goto err_exit; + } + + frags = skb_shinfo(skb)->nr_frags + 1; + /* Frags cannot be bigger 16KB + * because PTP usually works + * without Jumbo even in a background + */ + if (frags > AQ_CFG_SKB_FRAGS_MAX || frags > aq_ring_avail_dx(ring)) { + /* Drop packet because it doesn't make sence to delay it */ + dev_kfree_skb_any(skb); + goto err_exit; + } + + err = aq_ptp_skb_put(&aq_ptp->skb_ring, skb); + if (err) { + netdev_err(aq_nic->ndev, "SKB Ring is overflow (%u)!\n", + ring->size); + return NETDEV_TX_BUSY; + } + skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; + aq_ptp_tx_timeout_start(aq_ptp); + skb_tx_timestamp(skb); + + spin_lock_irqsave(&aq_nic->aq_ptp->ptp_ring_lock, irq_flags); + frags = aq_nic_map_skb(aq_nic, skb, ring); + + if (likely(frags)) { + err = aq_nic->aq_hw_ops->hw_ring_tx_xmit(aq_nic->aq_hw, + ring, frags); + if (err >= 0) { + ++ring->stats.tx.packets; + ring->stats.tx.bytes += skb->len; + } + } else { + err = NETDEV_TX_BUSY; + } + spin_unlock_irqrestore(&aq_nic->aq_ptp->ptp_ring_lock, irq_flags); + +err_exit: + return err; +} + +void aq_ptp_service_task(struct aq_nic_s *aq_nic) +{ + struct aq_ptp_s *aq_ptp = aq_nic->aq_ptp; + + if (!aq_ptp) + return; + + aq_ptp_tx_timeout_check(aq_ptp); +} + +int aq_ptp_irq_alloc(struct aq_nic_s *aq_nic) +{ + struct pci_dev *pdev = aq_nic->pdev; + struct aq_ptp_s *aq_ptp = aq_nic->aq_ptp; + int err = 0; + + if (!aq_ptp) + return 0; + + if (pdev->msix_enabled || pdev->msi_enabled) { + err = request_irq(pci_irq_vector(pdev, aq_ptp->idx_vector), + aq_ptp_isr, 0, aq_nic->ndev->name, aq_ptp); + } else { + err = -EINVAL; + goto err_exit; + } + +err_exit: + return err; +} + +void aq_ptp_irq_free(struct aq_nic_s *aq_nic) +{ + struct aq_ptp_s *aq_ptp = aq_nic->aq_ptp; + struct pci_dev *pdev = aq_nic->pdev; + + if (!aq_ptp) + return; + + free_irq(pci_irq_vector(pdev, aq_ptp->idx_vector), aq_ptp); +} + int aq_ptp_ring_init(struct aq_nic_s *aq_nic) { struct aq_ptp_s *aq_ptp = aq_nic->aq_ptp; @@ -189,6 +632,12 @@ int aq_ptp_ring_init(struct aq_nic_s *aq_nic) err = aq_nic->aq_hw_ops->hw_ring_rx_init(aq_nic->aq_hw, &aq_ptp->hwts_rx, &aq_ptp->ptp_ring_param); + if (err < 0) + goto err_exit; + err = aq_nic->aq_hw_ops->hw_ring_hwts_rx_fill(aq_nic->aq_hw, + &aq_ptp->hwts_rx); + if (err < 0) + goto err_exit; return err; @@ -219,6 +668,8 @@ int aq_ptp_ring_start(struct aq_nic_s *aq_nic) if (err < 0) goto err_exit; + napi_enable(&aq_ptp->napi); + err_exit: return err; } @@ -234,6 +685,8 @@ void aq_ptp_ring_stop(struct aq_nic_s *aq_nic) aq_nic->aq_hw_ops->hw_ring_rx_stop(aq_nic->aq_hw, &aq_ptp->ptp_rx); aq_nic->aq_hw_ops->hw_ring_rx_stop(aq_nic->aq_hw, &aq_ptp->hwts_rx); + + napi_disable(&aq_ptp->napi); } void aq_ptp_ring_deinit(struct aq_nic_s *aq_nic) @@ -306,6 +759,12 @@ int aq_ptp_ring_alloc(struct aq_nic_s *aq_nic) goto err_exit_hwts_rx; } + aq_ptp->ptp_ring_param.vec_idx = aq_ptp->idx_vector; + aq_ptp->ptp_ring_param.cpu = aq_ptp->ptp_ring_param.vec_idx + + aq_nic_get_cfg(aq_nic)->aq_rss.base_cpu_number; + cpumask_set_cpu(aq_ptp->ptp_ring_param.cpu, + &aq_ptp->ptp_ring_param.affinity_mask); + return 0; err_exit_hwts_rx: @@ -347,6 +806,60 @@ static struct ptp_clock_info aq_ptp_clock = { .pin_config = NULL, }; +#define ptp_offset_init(__idx, __mbps, __egress, __ingress) do { \ + ptp_offset[__idx].mbps = (__mbps); \ + ptp_offset[__idx].egress = (__egress); \ + ptp_offset[__idx].ingress = (__ingress); } \ + while (0) + +static void aq_ptp_offset_init_from_fw(const struct hw_aq_ptp_offset *offsets) +{ + int i; + + /* Load offsets for PTP */ + for (i = 0; i < ARRAY_SIZE(ptp_offset); i++) { + switch (i) { + /* 100M */ + case ptp_offset_idx_100: + ptp_offset_init(i, 100, + offsets->egress_100, + offsets->ingress_100); + break; + /* 1G */ + case ptp_offset_idx_1000: + ptp_offset_init(i, 1000, + offsets->egress_1000, + offsets->ingress_1000); + break; + /* 2.5G */ + case ptp_offset_idx_2500: + ptp_offset_init(i, 2500, + offsets->egress_2500, + offsets->ingress_2500); + break; + /* 5G */ + case ptp_offset_idx_5000: + ptp_offset_init(i, 5000, + offsets->egress_5000, + offsets->ingress_5000); + break; + /* 10G */ + case ptp_offset_idx_10000: + ptp_offset_init(i, 10000, + offsets->egress_10000, + offsets->ingress_10000); + break; + } + } +} + +static void aq_ptp_offset_init(const struct hw_aq_ptp_offset *offsets) +{ + memset(ptp_offset, 0, sizeof(ptp_offset)); + + aq_ptp_offset_init_from_fw(offsets); +} + void aq_ptp_clock_init(struct aq_nic_s *aq_nic) { struct aq_ptp_s *aq_ptp = aq_nic->aq_ptp; @@ -380,6 +893,8 @@ int aq_ptp_init(struct aq_nic_s *aq_nic, unsigned int idx_vec) return 0; } + aq_ptp_offset_init(&mbox.info.ptp_offset); + aq_ptp = kzalloc(sizeof(*aq_ptp), GFP_KERNEL); if (!aq_ptp) { err = -ENOMEM; @@ -399,6 +914,15 @@ int aq_ptp_init(struct aq_nic_s *aq_nic, unsigned int idx_vec) goto err_exit; } aq_ptp->ptp_clock = clock; + aq_ptp_tx_timeout_init(&aq_ptp->ptp_tx_timeout); + + atomic_set(&aq_ptp->offset_egress, 0); + atomic_set(&aq_ptp->offset_ingress, 0); + + netif_napi_add(aq_nic_get_ndev(aq_nic), &aq_ptp->napi, + aq_ptp_poll, AQ_CFG_NAPI_WEIGHT); + + aq_ptp->idx_vector = idx_vec; aq_nic->aq_ptp = aq_ptp; @@ -439,6 +963,12 @@ void aq_ptp_free(struct aq_nic_s *aq_nic) aq_nic->aq_fw_ops->enable_ptp(aq_nic->aq_hw, 0); mutex_unlock(&aq_nic->fwreq_mutex); + netif_napi_del(&aq_ptp->napi); kfree(aq_ptp); aq_nic->aq_ptp = NULL; } + +struct ptp_clock *aq_ptp_get_ptp_clock(struct aq_ptp_s *aq_ptp) +{ + return aq_ptp->ptp_clock; +} diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_ptp.h b/drivers/net/ethernet/aquantia/atlantic/aq_ptp.h index 32350f75e138..2c84483fcac1 100644 --- a/drivers/net/ethernet/aquantia/atlantic/aq_ptp.h +++ b/drivers/net/ethernet/aquantia/atlantic/aq_ptp.h @@ -17,6 +17,9 @@ int aq_ptp_init(struct aq_nic_s *aq_nic, unsigned int idx_vec); void aq_ptp_unregister(struct aq_nic_s *aq_nic); void aq_ptp_free(struct aq_nic_s *aq_nic); +int aq_ptp_irq_alloc(struct aq_nic_s *aq_nic); +void aq_ptp_irq_free(struct aq_nic_s *aq_nic); + int aq_ptp_ring_alloc(struct aq_nic_s *aq_nic); void aq_ptp_ring_free(struct aq_nic_s *aq_nic); @@ -25,6 +28,22 @@ int aq_ptp_ring_start(struct aq_nic_s *aq_nic); void aq_ptp_ring_stop(struct aq_nic_s *aq_nic); void aq_ptp_ring_deinit(struct aq_nic_s *aq_nic); +void aq_ptp_service_task(struct aq_nic_s *aq_nic); + +void aq_ptp_tm_offset_set(struct aq_nic_s *aq_nic, unsigned int mbps); + void aq_ptp_clock_init(struct aq_nic_s *aq_nic); +/* Traffic processing functions */ +int aq_ptp_xmit(struct aq_nic_s *aq_nic, struct sk_buff *skb); +void aq_ptp_tx_hwtstamp(struct aq_nic_s *aq_nic, u64 timestamp); + +/* Return either ring is belong to PTP or not*/ +bool aq_ptp_ring(struct aq_nic_s *aq_nic, struct aq_ring_s *ring); + +u16 aq_ptp_extract_ts(struct aq_nic_s *aq_nic, struct sk_buff *skb, u8 *p, + unsigned int len); + +struct ptp_clock *aq_ptp_get_ptp_clock(struct aq_ptp_s *aq_ptp); + #endif /* AQ_PTP_H */ diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_ring.c b/drivers/net/ethernet/aquantia/atlantic/aq_ring.c index 8e84ff6eefe3..f756cc0bbdf0 100644 --- a/drivers/net/ethernet/aquantia/atlantic/aq_ring.c +++ b/drivers/net/ethernet/aquantia/atlantic/aq_ring.c @@ -10,6 +10,7 @@ #include "aq_nic.h" #include "aq_hw.h" #include "aq_hw_utils.h" +#include "aq_ptp.h" #include #include @@ -314,6 +315,7 @@ int aq_ring_rx_clean(struct aq_ring_s *self, self->sw_head = aq_ring_next_dx(self, self->sw_head), --budget, ++(*work_done)) { struct aq_ring_buff_s *buff = &self->buff_ring[self->sw_head]; + bool is_ptp_ring = aq_ptp_ring(self->aq_nic, self); struct aq_ring_buff_s *buff_ = NULL; struct sk_buff *skb = NULL; unsigned int next_ = 0U; @@ -378,6 +380,11 @@ int aq_ring_rx_clean(struct aq_ring_s *self, err = -ENOMEM; goto err_exit; } + if (is_ptp_ring) + buff->len -= + aq_ptp_extract_ts(self->aq_nic, skb, + aq_buf_vaddr(&buff->rxdata), + buff->len); skb_put(skb, buff->len); page_ref_inc(buff->rxdata.page); } else { @@ -386,6 +393,11 @@ int aq_ring_rx_clean(struct aq_ring_s *self, err = -ENOMEM; goto err_exit; } + if (is_ptp_ring) + buff->len -= + aq_ptp_extract_ts(self->aq_nic, skb, + aq_buf_vaddr(&buff->rxdata), + buff->len); hdr_len = buff->len; if (hdr_len > AQ_CFG_RX_HDR_SIZE) @@ -445,8 +457,8 @@ int aq_ring_rx_clean(struct aq_ring_s *self, skb_set_hash(skb, buff->rss_hash, buff->is_hash_l4 ? PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_NONE); - - skb_record_rx_queue(skb, self->idx); + /* Send all PTP traffic to 0 queue */ + skb_record_rx_queue(skb, is_ptp_ring ? 0 : self->idx); ++self->stats.rx.packets; self->stats.rx.bytes += skb->len; @@ -458,6 +470,21 @@ int aq_ring_rx_clean(struct aq_ring_s *self, return err; } +void aq_ring_hwts_rx_clean(struct aq_ring_s *self, struct aq_nic_s *aq_nic) +{ + while (self->sw_head != self->hw_head) { + u64 ns; + + aq_nic->aq_hw_ops->extract_hwts(aq_nic->aq_hw, + self->dx_ring + + (self->sw_head * self->dx_size), + self->dx_size, &ns); + aq_ptp_tx_hwtstamp(aq_nic, ns); + + self->sw_head = aq_ring_next_dx(self, self->sw_head); + } +} + int aq_ring_rx_fill(struct aq_ring_s *self) { unsigned int page_order = self->page_order; diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_ring.h b/drivers/net/ethernet/aquantia/atlantic/aq_ring.h index 068689f44bc9..be3702a4dcc9 100644 --- a/drivers/net/ethernet/aquantia/atlantic/aq_ring.h +++ b/drivers/net/ethernet/aquantia/atlantic/aq_ring.h @@ -177,5 +177,6 @@ int aq_ring_rx_fill(struct aq_ring_s *self); struct aq_ring_s *aq_ring_hwts_rx_alloc(struct aq_ring_s *self, struct aq_nic_s *aq_nic, unsigned int idx, unsigned int size, unsigned int dx_size); +void aq_ring_hwts_rx_clean(struct aq_ring_s *self, struct aq_nic_s *aq_nic); #endif /* AQ_RING_H */ diff --git a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c index 55c7f9985692..bd9e5a598657 100644 --- a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c +++ b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c @@ -682,6 +682,46 @@ static int hw_atl_b0_hw_ring_rx_fill(struct aq_hw_s *self, return aq_hw_err_from_flags(self); } +static int hw_atl_b0_hw_ring_hwts_rx_fill(struct aq_hw_s *self, + struct aq_ring_s *ring) +{ + unsigned int i; + + for (i = aq_ring_avail_dx(ring); i--; + ring->sw_tail = aq_ring_next_dx(ring, ring->sw_tail)) { + struct hw_atl_rxd_s *rxd = + (struct hw_atl_rxd_s *) + &ring->dx_ring[ring->sw_tail * HW_ATL_B0_RXD_SIZE]; + + rxd->buf_addr = ring->dx_ring_pa + ring->size * ring->dx_size; + rxd->hdr_addr = 0U; + } + /* Make sure descriptors are updated before bump tail*/ + wmb(); + + hw_atl_reg_rx_dma_desc_tail_ptr_set(self, ring->sw_tail, ring->idx); + + return aq_hw_err_from_flags(self); +} + +static int hw_atl_b0_hw_ring_hwts_rx_receive(struct aq_hw_s *self, + struct aq_ring_s *ring) +{ + while (ring->hw_head != ring->sw_tail) { + struct hw_atl_rxd_hwts_wb_s *hwts_wb = + (struct hw_atl_rxd_hwts_wb_s *) + (ring->dx_ring + (ring->hw_head * HW_ATL_B0_RXD_SIZE)); + + /* RxD is not done */ + if (!(hwts_wb->sec_lw0 & 0x1U)) + break; + + ring->hw_head = aq_ring_next_dx(ring, ring->hw_head); + } + + return aq_hw_err_from_flags(self); +} + static int hw_atl_b0_hw_ring_tx_head_update(struct aq_hw_s *self, struct aq_ring_s *ring) { @@ -1133,6 +1173,61 @@ static int hw_atl_b0_adj_clock_freq(struct aq_hw_s *self, s32 ppb) return self->aq_fw_ops->send_fw_request(self, &fwreq, size); } +static u16 hw_atl_b0_rx_extract_ts(struct aq_hw_s *self, u8 *p, + unsigned int len, u64 *timestamp) +{ + unsigned int offset = 14; + struct ethhdr *eth; + u64 sec; + u8 *ptr; + u32 ns; + + if (len <= offset || !timestamp) + return 0; + + /* The TIMESTAMP in the end of package has following format: + * (big-endian) + * struct { + * uint64_t sec; + * uint32_t ns; + * uint16_t stream_id; + * }; + */ + ptr = p + (len - offset); + memcpy(&sec, ptr, sizeof(sec)); + ptr += sizeof(sec); + memcpy(&ns, ptr, sizeof(ns)); + + sec = be64_to_cpu(sec) & 0xffffffffffffllu; + ns = be32_to_cpu(ns); + *timestamp = sec * NSEC_PER_SEC + ns + self->ptp_clk_offset; + + eth = (struct ethhdr *)p; + + return (eth->h_proto == htons(ETH_P_1588)) ? 12 : 14; +} + +static int hw_atl_b0_extract_hwts(struct aq_hw_s *self, u8 *p, unsigned int len, + u64 *timestamp) +{ + struct hw_atl_rxd_hwts_wb_s *hwts_wb = (struct hw_atl_rxd_hwts_wb_s *)p; + u64 tmp, sec, ns; + + sec = 0; + tmp = (hwts_wb->sec_lw0 >> 2) & 0x3ff; + sec += tmp; + tmp = (u64)((hwts_wb->sec_lw1 >> 16) & 0xffff) << 10; + sec += tmp; + tmp = (u64)(hwts_wb->sec_hw & 0xfff) << 26; + sec += tmp; + tmp = (u64)((hwts_wb->sec_hw >> 22) & 0x3ff) << 38; + sec += tmp; + ns = sec * NSEC_PER_SEC + hwts_wb->ns; + if (timestamp) + *timestamp = ns + self->ptp_clk_offset; + return 0; +} + static int hw_atl_b0_hw_fl3l4_clear(struct aq_hw_s *self, struct aq_rx_filter_l3l4 *data) { @@ -1309,11 +1404,16 @@ const struct aq_hw_ops hw_atl_ops_b0 = { .hw_tx_tc_mode_get = hw_atl_b0_tx_tc_mode_get, .hw_rx_tc_mode_get = hw_atl_b0_rx_tc_mode_get, + .hw_ring_hwts_rx_fill = hw_atl_b0_hw_ring_hwts_rx_fill, + .hw_ring_hwts_rx_receive = hw_atl_b0_hw_ring_hwts_rx_receive, + .hw_get_ptp_ts = hw_atl_b0_get_ptp_ts, .hw_adj_sys_clock = hw_atl_b0_adj_sys_clock, .hw_set_sys_clock = hw_atl_b0_set_sys_clock, .hw_adj_clock_freq = hw_atl_b0_adj_clock_freq, + .rx_extract_ts = hw_atl_b0_rx_extract_ts, + .extract_hwts = hw_atl_b0_extract_hwts, .hw_set_offload = hw_atl_b0_hw_offload_set, .hw_set_fc = hw_atl_b0_set_fc, }; -- GitLab