From 430da208089ba74ff3d2992d80387c8ea5cabd0e Mon Sep 17 00:00:00 2001 From: Sunil Goutham Date: Thu, 24 Nov 2016 14:48:03 +0530 Subject: [PATCH] net: thunderx: Pause frame support Enable pause frames on both Rx and Tx side, configure pause interval e.t.c. Also support for enable/disable pause frames on Rx/Tx via ethtool has been added. Signed-off-by: Sunil Goutham Signed-off-by: David S. Miller --- drivers/net/ethernet/cavium/thunder/nic.h | 17 ++++++ .../net/ethernet/cavium/thunder/nic_main.c | 27 ++++++++++ .../ethernet/cavium/thunder/nicvf_ethtool.c | 51 ++++++++++++++++++ .../net/ethernet/cavium/thunder/nicvf_main.c | 6 +++ .../net/ethernet/cavium/thunder/thunder_bgx.c | 53 +++++++++++++++++++ .../net/ethernet/cavium/thunder/thunder_bgx.h | 12 +++++ 6 files changed, 166 insertions(+) diff --git a/drivers/net/ethernet/cavium/thunder/nic.h b/drivers/net/ethernet/cavium/thunder/nic.h index be8404a9a325..e739c7153562 100644 --- a/drivers/net/ethernet/cavium/thunder/nic.h +++ b/drivers/net/ethernet/cavium/thunder/nic.h @@ -149,6 +149,12 @@ struct nicvf_rss_info { u64 key[RSS_HASH_KEY_SIZE]; } ____cacheline_aligned_in_smp; +struct nicvf_pfc { + u8 autoneg; + u8 fc_rx; + u8 fc_tx; +}; + enum rx_stats_reg_offset { RX_OCTS = 0x0, RX_UCAST = 0x1, @@ -298,6 +304,7 @@ struct nicvf { bool tns_mode; bool loopback_supported; struct nicvf_rss_info rss_info; + struct nicvf_pfc pfc; struct tasklet_struct qs_err_task; struct work_struct reset_task; @@ -358,6 +365,7 @@ struct nicvf { #define NIC_MBOX_MSG_SNICVF_PTR 0x15 /* Send sqet nicvf ptr to PVF */ #define NIC_MBOX_MSG_LOOPBACK 0x16 /* Set interface in loopback */ #define NIC_MBOX_MSG_RESET_STAT_COUNTER 0x17 /* Reset statistics counters */ +#define NIC_MBOX_MSG_PFC 0x18 /* Pause frame control */ #define NIC_MBOX_MSG_CFG_DONE 0xF0 /* VF configuration done */ #define NIC_MBOX_MSG_SHUTDOWN 0xF1 /* VF is being shutdown */ @@ -500,6 +508,14 @@ struct reset_stat_cfg { u16 sq_stat_mask; }; +struct pfc { + u8 msg; + u8 get; /* Get or set PFC settings */ + u8 autoneg; + u8 fc_rx; + u8 fc_tx; +}; + /* 128 bit shared memory between PF and each VF */ union nic_mbx { struct { u8 msg; } msg; @@ -518,6 +534,7 @@ union nic_mbx { struct nicvf_ptr nicvf; struct set_loopback lbk; struct reset_stat_cfg reset_stat; + struct pfc pfc; }; #define NIC_NODE_ID_MASK 0x03 diff --git a/drivers/net/ethernet/cavium/thunder/nic_main.c b/drivers/net/ethernet/cavium/thunder/nic_main.c index 17490ec02428..767234e2e8f9 100644 --- a/drivers/net/ethernet/cavium/thunder/nic_main.c +++ b/drivers/net/ethernet/cavium/thunder/nic_main.c @@ -898,6 +898,30 @@ static void nic_enable_vf(struct nicpf *nic, int vf, bool enable) bgx_lmac_rx_tx_enable(nic->node, bgx, lmac, enable); } +static void nic_pause_frame(struct nicpf *nic, int vf, struct pfc *cfg) +{ + int bgx, lmac; + struct pfc pfc; + union nic_mbx mbx = {}; + + if (vf >= nic->num_vf_en) + return; + bgx = NIC_GET_BGX_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vf]); + lmac = NIC_GET_LMAC_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vf]); + + if (cfg->get) { + bgx_lmac_get_pfc(nic->node, bgx, lmac, &pfc); + mbx.pfc.msg = NIC_MBOX_MSG_PFC; + mbx.pfc.autoneg = pfc.autoneg; + mbx.pfc.fc_rx = pfc.fc_rx; + mbx.pfc.fc_tx = pfc.fc_tx; + nic_send_msg_to_vf(nic, vf, &mbx); + } else { + bgx_lmac_set_pfc(nic->node, bgx, lmac, cfg); + nic_mbx_send_ack(nic, vf); + } +} + /* Interrupt handler to handle mailbox messages from VFs */ static void nic_handle_mbx_intr(struct nicpf *nic, int vf) { @@ -1037,6 +1061,9 @@ static void nic_handle_mbx_intr(struct nicpf *nic, int vf) case NIC_MBOX_MSG_RESET_STAT_COUNTER: ret = nic_reset_stat_counters(nic, vf, &mbx.reset_stat); break; + case NIC_MBOX_MSG_PFC: + nic_pause_frame(nic, vf, &mbx.pfc); + goto unlock; default: dev_err(&nic->pdev->dev, "Invalid msg from VF%d, msg 0x%x\n", vf, mbx.msg.msg); diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_ethtool.c b/drivers/net/ethernet/cavium/thunder/nicvf_ethtool.c index d4d76a72b998..b0482410052d 100644 --- a/drivers/net/ethernet/cavium/thunder/nicvf_ethtool.c +++ b/drivers/net/ethernet/cavium/thunder/nicvf_ethtool.c @@ -720,6 +720,55 @@ static int nicvf_set_channels(struct net_device *dev, return err; } +static void nicvf_get_pauseparam(struct net_device *dev, + struct ethtool_pauseparam *pause) +{ + struct nicvf *nic = netdev_priv(dev); + union nic_mbx mbx = {}; + + /* Supported only for 10G/40G interfaces */ + if ((nic->mac_type == BGX_MODE_SGMII) || + (nic->mac_type == BGX_MODE_QSGMII) || + (nic->mac_type == BGX_MODE_RGMII)) + return; + + mbx.pfc.msg = NIC_MBOX_MSG_PFC; + mbx.pfc.get = 1; + if (!nicvf_send_msg_to_pf(nic, &mbx)) { + pause->autoneg = nic->pfc.autoneg; + pause->rx_pause = nic->pfc.fc_rx; + pause->tx_pause = nic->pfc.fc_tx; + } +} + +static int nicvf_set_pauseparam(struct net_device *dev, + struct ethtool_pauseparam *pause) +{ + struct nicvf *nic = netdev_priv(dev); + union nic_mbx mbx = {}; + + /* Supported only for 10G/40G interfaces */ + if ((nic->mac_type == BGX_MODE_SGMII) || + (nic->mac_type == BGX_MODE_QSGMII) || + (nic->mac_type == BGX_MODE_RGMII)) + return -EOPNOTSUPP; + + if (pause->autoneg) + return -EOPNOTSUPP; + + mbx.pfc.msg = NIC_MBOX_MSG_PFC; + mbx.pfc.get = 0; + mbx.pfc.fc_rx = pause->rx_pause; + mbx.pfc.fc_tx = pause->tx_pause; + if (nicvf_send_msg_to_pf(nic, &mbx)) + return -EAGAIN; + + nic->pfc.fc_rx = pause->rx_pause; + nic->pfc.fc_tx = pause->tx_pause; + + return 0; +} + static const struct ethtool_ops nicvf_ethtool_ops = { .get_settings = nicvf_get_settings, .get_link = nicvf_get_link, @@ -741,6 +790,8 @@ static const struct ethtool_ops nicvf_ethtool_ops = { .set_rxfh = nicvf_set_rxfh, .get_channels = nicvf_get_channels, .set_channels = nicvf_set_channels, + .get_pauseparam = nicvf_get_pauseparam, + .set_pauseparam = nicvf_set_pauseparam, .get_ts_info = ethtool_op_get_ts_info, }; diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_main.c b/drivers/net/ethernet/cavium/thunder/nicvf_main.c index c6c23033e6eb..1eacec85dac3 100644 --- a/drivers/net/ethernet/cavium/thunder/nicvf_main.c +++ b/drivers/net/ethernet/cavium/thunder/nicvf_main.c @@ -256,6 +256,12 @@ static void nicvf_handle_mbx_intr(struct nicvf *nic) nic->pnicvf = (struct nicvf *)mbx.nicvf.nicvf; nic->pf_acked = true; break; + case NIC_MBOX_MSG_PFC: + nic->pfc.autoneg = mbx.pfc.autoneg; + nic->pfc.fc_rx = mbx.pfc.fc_rx; + nic->pfc.fc_tx = mbx.pfc.fc_tx; + nic->pf_acked = true; + break; default: netdev_err(nic->netdev, "Invalid message from PF, msg 0x%x\n", mbx.msg.msg); diff --git a/drivers/net/ethernet/cavium/thunder/thunder_bgx.c b/drivers/net/ethernet/cavium/thunder/thunder_bgx.c index 29c727fc887a..9211c750e064 100644 --- a/drivers/net/ethernet/cavium/thunder/thunder_bgx.c +++ b/drivers/net/ethernet/cavium/thunder/thunder_bgx.c @@ -212,6 +212,47 @@ void bgx_lmac_rx_tx_enable(int node, int bgx_idx, int lmacid, bool enable) } EXPORT_SYMBOL(bgx_lmac_rx_tx_enable); +void bgx_lmac_get_pfc(int node, int bgx_idx, int lmacid, void *pause) +{ + struct pfc *pfc = (struct pfc *)pause; + struct bgx *bgx = bgx_vnic[(node * MAX_BGX_PER_CN88XX) + bgx_idx]; + struct lmac *lmac; + u64 cfg; + + if (!bgx) + return; + lmac = &bgx->lmac[lmacid]; + if (lmac->is_sgmii) + return; + + cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_CBFC_CTL); + pfc->fc_rx = cfg & RX_EN; + pfc->fc_tx = cfg & TX_EN; + pfc->autoneg = 0; +} +EXPORT_SYMBOL(bgx_lmac_get_pfc); + +void bgx_lmac_set_pfc(int node, int bgx_idx, int lmacid, void *pause) +{ + struct pfc *pfc = (struct pfc *)pause; + struct bgx *bgx = bgx_vnic[(node * MAX_BGX_PER_CN88XX) + bgx_idx]; + struct lmac *lmac; + u64 cfg; + + if (!bgx) + return; + lmac = &bgx->lmac[lmacid]; + if (lmac->is_sgmii) + return; + + cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_CBFC_CTL); + cfg &= ~(RX_EN | TX_EN); + cfg |= (pfc->fc_rx ? RX_EN : 0x00); + cfg |= (pfc->fc_tx ? TX_EN : 0x00); + bgx_reg_write(bgx, lmacid, BGX_SMUX_CBFC_CTL, cfg); +} +EXPORT_SYMBOL(bgx_lmac_set_pfc); + static void bgx_sgmii_change_link_state(struct lmac *lmac) { struct bgx *bgx = lmac->bgx; @@ -525,6 +566,18 @@ static int bgx_lmac_xaui_init(struct bgx *bgx, struct lmac *lmac) cfg |= SMU_TX_CTL_DIC_EN; bgx_reg_write(bgx, lmacid, BGX_SMUX_TX_CTL, cfg); + /* Enable receive and transmission of pause frames */ + bgx_reg_write(bgx, lmacid, BGX_SMUX_CBFC_CTL, ((0xffffULL << 32) | + BCK_EN | DRP_EN | TX_EN | RX_EN)); + /* Configure pause time and interval */ + bgx_reg_write(bgx, lmacid, + BGX_SMUX_TX_PAUSE_PKT_TIME, DEFAULT_PAUSE_TIME); + cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_TX_PAUSE_PKT_INTERVAL); + cfg &= ~0xFFFFull; + bgx_reg_write(bgx, lmacid, BGX_SMUX_TX_PAUSE_PKT_INTERVAL, + cfg | (DEFAULT_PAUSE_TIME - 0x1000)); + bgx_reg_write(bgx, lmacid, BGX_SMUX_TX_PAUSE_ZERO, 0x01); + /* take lmac_count into account */ bgx_reg_modify(bgx, lmacid, BGX_SMUX_TX_THRESH, (0x100 - 1)); /* max packet size */ diff --git a/drivers/net/ethernet/cavium/thunder/thunder_bgx.h b/drivers/net/ethernet/cavium/thunder/thunder_bgx.h index 01cc7c859131..c18ebfeb2039 100644 --- a/drivers/net/ethernet/cavium/thunder/thunder_bgx.h +++ b/drivers/net/ethernet/cavium/thunder/thunder_bgx.h @@ -27,6 +27,7 @@ #define MAX_BGX_CHANS_PER_LMAC 16 #define MAX_DMAC_PER_LMAC 8 #define MAX_FRAME_SIZE 9216 +#define DEFAULT_PAUSE_TIME 0xFFFF #define BGX_ID_MASK 0x3 @@ -126,7 +127,10 @@ #define SMU_RX_CTL_STATUS (3ull << 0) #define BGX_SMUX_TX_APPEND 0x20100 #define SMU_TX_APPEND_FCS_D BIT_ULL(2) +#define BGX_SMUX_TX_PAUSE_PKT_TIME 0x20110 #define BGX_SMUX_TX_MIN_PKT 0x20118 +#define BGX_SMUX_TX_PAUSE_PKT_INTERVAL 0x20120 +#define BGX_SMUX_TX_PAUSE_ZERO 0x20138 #define BGX_SMUX_TX_INT 0x20140 #define BGX_SMUX_TX_CTL 0x20178 #define SMU_TX_CTL_DIC_EN BIT_ULL(0) @@ -136,6 +140,11 @@ #define BGX_SMUX_CTL 0x20200 #define SMU_CTL_RX_IDLE BIT_ULL(0) #define SMU_CTL_TX_IDLE BIT_ULL(1) +#define BGX_SMUX_CBFC_CTL 0x20218 +#define RX_EN BIT_ULL(0) +#define TX_EN BIT_ULL(1) +#define BCK_EN BIT_ULL(2) +#define DRP_EN BIT_ULL(3) #define BGX_GMP_PCS_MRX_CTL 0x30000 #define PCS_MRX_CTL_RST_AN BIT_ULL(9) @@ -207,6 +216,9 @@ void bgx_set_lmac_mac(int node, int bgx_idx, int lmacid, const u8 *mac); void bgx_get_lmac_link_state(int node, int bgx_idx, int lmacid, void *status); void bgx_lmac_internal_loopback(int node, int bgx_idx, int lmac_idx, bool enable); +void bgx_lmac_get_pfc(int node, int bgx_idx, int lmacid, void *pause); +void bgx_lmac_set_pfc(int node, int bgx_idx, int lmacid, void *pause); + void xcv_init_hw(void); void xcv_setup_link(bool link_up, int link_speed); -- 2.45.2