From 688848b1493a0a55059041dcc1ea332dabd1c75d Mon Sep 17 00:00:00 2001 From: Anish Bhatt Date: Thu, 19 Jun 2014 21:37:13 -0700 Subject: [PATCH] cxgb4 : Integrate DCBx support into cxgb4 module. Register dbcnl_ops to give access to DCBx functions Signed-off-by: Anish Bhatt Signed-off-by: David S. Miller --- drivers/net/ethernet/chelsio/cxgb4/cxgb4.h | 11 + .../net/ethernet/chelsio/cxgb4/cxgb4_main.c | 199 +++++++++++++++++- drivers/net/ethernet/chelsio/cxgb4/t4_hw.c | 76 ++++++- 3 files changed, 272 insertions(+), 14 deletions(-) diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h index f503dce4ab17..9d69c3ebbf00 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h +++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h @@ -373,6 +373,8 @@ enum { struct adapter; struct sge_rspq; +#include "cxgb4_dcb.h" + struct port_info { struct adapter *adapter; u16 viid; @@ -389,6 +391,9 @@ struct port_info { u8 rss_mode; struct link_config link_cfg; u16 *rss; +#ifdef CONFIG_CHELSIO_T4_DCB + struct port_dcb_info dcb; /* Data Center Bridging support */ +#endif }; struct dentry; @@ -1007,6 +1012,10 @@ int t4_query_params(struct adapter *adap, unsigned int mbox, unsigned int pf, int t4_set_params(struct adapter *adap, unsigned int mbox, unsigned int pf, unsigned int vf, unsigned int nparams, const u32 *params, const u32 *val); +int t4_set_params_nosleep(struct adapter *adap, unsigned int mbox, + unsigned int pf, unsigned int vf, + unsigned int nparams, const u32 *params, + const u32 *val); int t4_cfg_pfvf(struct adapter *adap, unsigned int mbox, unsigned int pf, unsigned int vf, unsigned int txq, unsigned int txq_eth_ctrl, unsigned int rxqi, unsigned int rxq, unsigned int tc, @@ -1025,6 +1034,8 @@ int t4_change_mac(struct adapter *adap, unsigned int mbox, unsigned int viid, int idx, const u8 *addr, bool persist, bool add_smt); int t4_set_addr_hash(struct adapter *adap, unsigned int mbox, unsigned int viid, bool ucast, u64 vec, bool sleep_ok); +int t4_enable_vi_params(struct adapter *adap, unsigned int mbox, + unsigned int viid, bool rx_en, bool tx_en, bool dcb_en); int t4_enable_vi(struct adapter *adap, unsigned int mbox, unsigned int viid, bool rx_en, bool tx_en); int t4_identify_port(struct adapter *adap, unsigned int mbox, unsigned int viid, diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c index 2f8d6b910383..74b0ce50a8ef 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c +++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c @@ -67,6 +67,7 @@ #include "t4_regs.h" #include "t4_msg.h" #include "t4fw_api.h" +#include "cxgb4_dcb.h" #include "l2t.h" #include <../drivers/net/bonding/bonding.h> @@ -391,6 +392,17 @@ module_param_array(num_vf, uint, NULL, 0644); MODULE_PARM_DESC(num_vf, "number of VFs for each of PFs 0-3"); #endif +/* TX Queue select used to determine what algorithm to use for selecting TX + * queue. Select between the kernel provided function (select_queue=0) or user + * cxgb_select_queue function (select_queue=1) + * + * Default: select_queue=0 + */ +static int select_queue; +module_param(select_queue, int, 0644); +MODULE_PARM_DESC(select_queue, + "Select between kernel provided method of selecting or driver method of selecting TX queue. Default is kernel method."); + /* * The filter TCAM has a fixed portion and a variable portion. The fixed * portion can match on source/destination IP IPv4/IPv6 addresses and TCP/UDP @@ -458,6 +470,42 @@ static void link_report(struct net_device *dev) } } +#ifdef CONFIG_CHELSIO_T4_DCB +/* Set up/tear down Data Center Bridging Priority mapping for a net device. */ +static void dcb_tx_queue_prio_enable(struct net_device *dev, int enable) +{ + struct port_info *pi = netdev_priv(dev); + struct adapter *adap = pi->adapter; + struct sge_eth_txq *txq = &adap->sge.ethtxq[pi->first_qset]; + int i; + + /* We use a simple mapping of Port TX Queue Index to DCB + * Priority when we're enabling DCB. + */ + for (i = 0; i < pi->nqsets; i++, txq++) { + u32 name, value; + int err; + + name = (FW_PARAMS_MNEM(FW_PARAMS_MNEM_DMAQ) | + FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_DMAQ_EQ_DCBPRIO_ETH) | + FW_PARAMS_PARAM_YZ(txq->q.cntxt_id)); + value = enable ? i : 0xffffffff; + + /* Since we can be called while atomic (from "interrupt + * level") we need to issue the Set Parameters Commannd + * without sleeping (timeout < 0). + */ + err = t4_set_params_nosleep(adap, adap->mbox, adap->fn, 0, 1, + &name, &value); + + if (err) + dev_err(adap->pdev_dev, + "Can't %s DCB Priority on port %d, TX Queue %d: err=%d\n", + enable ? "set" : "unset", pi->port_id, i, -err); + } +} +#endif /* CONFIG_CHELSIO_T4_DCB */ + void t4_os_link_changed(struct adapter *adapter, int port_id, int link_stat) { struct net_device *dev = adapter->port[port_id]; @@ -466,8 +514,13 @@ void t4_os_link_changed(struct adapter *adapter, int port_id, int link_stat) if (netif_running(dev) && link_stat != netif_carrier_ok(dev)) { if (link_stat) netif_carrier_on(dev); - else + else { +#ifdef CONFIG_CHELSIO_T4_DCB + cxgb4_dcb_state_init(dev); + dcb_tx_queue_prio_enable(dev, false); +#endif /* CONFIG_CHELSIO_T4_DCB */ netif_carrier_off(dev); + } link_report(dev); } @@ -601,10 +654,45 @@ static int link_start(struct net_device *dev) ret = t4_link_start(pi->adapter, mb, pi->tx_chan, &pi->link_cfg); if (ret == 0) - ret = t4_enable_vi(pi->adapter, mb, pi->viid, true, true); + ret = t4_enable_vi_params(pi->adapter, mb, pi->viid, true, + true, CXGB4_DCB_ENABLED); + return ret; } +int cxgb4_dcb_enabled(const struct net_device *dev) +{ +#ifdef CONFIG_CHELSIO_T4_DCB + struct port_info *pi = netdev_priv(dev); + + return pi->dcb.state == CXGB4_DCB_STATE_FW_ALLSYNCED; +#else + return 0; +#endif +} +EXPORT_SYMBOL(cxgb4_dcb_enabled); + +#ifdef CONFIG_CHELSIO_T4_DCB +/* Handle a Data Center Bridging update message from the firmware. */ +static void dcb_rpl(struct adapter *adap, const struct fw_port_cmd *pcmd) +{ + int port = FW_PORT_CMD_PORTID_GET(ntohl(pcmd->op_to_portid)); + struct net_device *dev = adap->port[port]; + int old_dcb_enabled = cxgb4_dcb_enabled(dev); + int new_dcb_enabled; + + cxgb4_dcb_handle_fw_update(adap, pcmd); + new_dcb_enabled = cxgb4_dcb_enabled(dev); + + /* If the DCB has become enabled or disabled on the port then we're + * going to need to set up/tear down DCB Priority parameters for the + * TX Queues associated with the port. + */ + if (new_dcb_enabled != old_dcb_enabled) + dcb_tx_queue_prio_enable(dev, new_dcb_enabled); +} +#endif /* CONFIG_CHELSIO_T4_DCB */ + /* Clear a filter and release any of its resources that we own. This also * clears the filter's "pending" status. */ @@ -709,8 +797,32 @@ static int fwevtq_handler(struct sge_rspq *q, const __be64 *rsp, } else if (opcode == CPL_FW6_MSG || opcode == CPL_FW4_MSG) { const struct cpl_fw6_msg *p = (void *)rsp; - if (p->type == 0) - t4_handle_fw_rpl(q->adap, p->data); +#ifdef CONFIG_CHELSIO_T4_DCB + const struct fw_port_cmd *pcmd = (const void *)p->data; + unsigned int cmd = FW_CMD_OP_GET(ntohl(pcmd->op_to_portid)); + unsigned int action = + FW_PORT_CMD_ACTION_GET(ntohl(pcmd->action_to_len16)); + + if (cmd == FW_PORT_CMD && + action == FW_PORT_ACTION_GET_PORT_INFO) { + int port = FW_PORT_CMD_PORTID_GET( + be32_to_cpu(pcmd->op_to_portid)); + struct net_device *dev = q->adap->port[port]; + int state_input = ((pcmd->u.info.dcbxdis_pkd & + FW_PORT_CMD_DCBXDIS) + ? CXGB4_DCB_INPUT_FW_DISABLED + : CXGB4_DCB_INPUT_FW_ENABLED); + + cxgb4_dcb_state_fsm(dev, state_input); + } + + if (cmd == FW_PORT_CMD && + action == FW_PORT_ACTION_L2_DCB_CFG) + dcb_rpl(q->adap, pcmd); + else +#endif + if (p->type == 0) + t4_handle_fw_rpl(q->adap, p->data); } else if (opcode == CPL_L2T_WRITE_RPL) { const struct cpl_l2t_write_rpl *p = (void *)rsp; @@ -1290,6 +1402,48 @@ static int del_filter_wr(struct adapter *adapter, int fidx) return 0; } +static u16 cxgb_select_queue(struct net_device *dev, struct sk_buff *skb, + void *accel_priv, select_queue_fallback_t fallback) +{ + int txq; + +#ifdef CONFIG_CHELSIO_T4_DCB + /* If a Data Center Bridging has been successfully negotiated on this + * link then we'll use the skb's priority to map it to a TX Queue. + * The skb's priority is determined via the VLAN Tag Priority Code + * Point field. + */ + if (cxgb4_dcb_enabled(dev)) { + u16 vlan_tci; + int err; + + err = vlan_get_tag(skb, &vlan_tci); + if (unlikely(err)) { + if (net_ratelimit()) + netdev_warn(dev, + "TX Packet without VLAN Tag on DCB Link\n"); + txq = 0; + } else { + txq = (vlan_tci & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT; + } + return txq; + } +#endif /* CONFIG_CHELSIO_T4_DCB */ + + if (select_queue) { + txq = (skb_rx_queue_recorded(skb) + ? skb_get_rx_queue(skb) + : smp_processor_id()); + + while (unlikely(txq >= dev->real_num_tx_queues)) + txq -= dev->real_num_tx_queues; + + return txq; + } + + return fallback(dev, skb) % dev->real_num_tx_queues; +} + static inline int is_offload(const struct adapter *adap) { return adap->params.offload; @@ -4601,6 +4755,7 @@ static const struct net_device_ops cxgb4_netdev_ops = { .ndo_open = cxgb_open, .ndo_stop = cxgb_close, .ndo_start_xmit = t4_eth_xmit, + .ndo_select_queue = cxgb_select_queue, .ndo_get_stats64 = cxgb_get_stats, .ndo_set_rx_mode = cxgb_set_rxmode, .ndo_set_mac_address = cxgb_set_mac_addr, @@ -5841,12 +5996,33 @@ static inline void init_rspq(struct adapter *adap, struct sge_rspq *q, static void cfg_queues(struct adapter *adap) { struct sge *s = &adap->sge; - int i, q10g = 0, n10g = 0, qidx = 0; + int i, n10g = 0, qidx = 0; +#ifndef CONFIG_CHELSIO_T4_DCB + int q10g = 0; +#endif int ciq_size; for_each_port(adap, i) n10g += is_x_10g_port(&adap2pinfo(adap, i)->link_cfg); +#ifdef CONFIG_CHELSIO_T4_DCB + /* For Data Center Bridging support we need to be able to support up + * to 8 Traffic Priorities; each of which will be assigned to its + * own TX Queue in order to prevent Head-Of-Line Blocking. + */ + if (adap->params.nports * 8 > MAX_ETH_QSETS) { + dev_err(adap->pdev_dev, "MAX_ETH_QSETS=%d < %d!\n", + MAX_ETH_QSETS, adap->params.nports * 8); + BUG_ON(1); + } + for_each_port(adap, i) { + struct port_info *pi = adap2pinfo(adap, i); + + pi->first_qset = qidx; + pi->nqsets = 8; + qidx += pi->nqsets; + } +#else /* !CONFIG_CHELSIO_T4_DCB */ /* * We default to 1 queue per non-10G port and up to # of cores queues * per 10G port. @@ -5863,6 +6039,7 @@ static void cfg_queues(struct adapter *adap) pi->nqsets = is_x_10g_port(&pi->link_cfg) ? q10g : 1; qidx += pi->nqsets; } +#endif /* !CONFIG_CHELSIO_T4_DCB */ s->ethqsets = qidx; s->max_ethqsets = qidx; /* MSI-X may lower it later */ @@ -5981,8 +6158,14 @@ static int enable_msix(struct adapter *adap) /* need nchan for each possible ULD */ ofld_need = 3 * nchan; } +#ifdef CONFIG_CHELSIO_T4_DCB + /* For Data Center Bridging we need 8 Ethernet TX Priority Queues for + * each port. + */ + need = 8 * adap->params.nports + EXTRA_VECS + ofld_need; +#else need = adap->params.nports + EXTRA_VECS + ofld_need; - +#endif want = pci_enable_msix_range(adap->pdev, entries, need, want); if (want < 0) return want; @@ -6245,6 +6428,10 @@ static int init_one(struct pci_dev *pdev, const struct pci_device_id *ent) netdev->priv_flags |= IFF_UNICAST_FLT; netdev->netdev_ops = &cxgb4_netdev_ops; +#ifdef CONFIG_CHELSIO_T4_DCB + netdev->dcbnl_ops = &cxgb4_dcb_ops; + cxgb4_dcb_state_init(netdev); +#endif netdev->ethtool_ops = &cxgb_ethtool_ops; } diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c index bba67681aeaa..2a9da077c806 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c +++ b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c @@ -3174,6 +3174,46 @@ int t4_query_params(struct adapter *adap, unsigned int mbox, unsigned int pf, return ret; } +/** + * t4_set_params_nosleep - sets FW or device parameters + * @adap: the adapter + * @mbox: mailbox to use for the FW command + * @pf: the PF + * @vf: the VF + * @nparams: the number of parameters + * @params: the parameter names + * @val: the parameter values + * + * Does not ever sleep + * Sets the value of FW or device parameters. Up to 7 parameters can be + * specified at once. + */ +int t4_set_params_nosleep(struct adapter *adap, unsigned int mbox, + unsigned int pf, unsigned int vf, + unsigned int nparams, const u32 *params, + const u32 *val) +{ + struct fw_params_cmd c; + __be32 *p = &c.param[0].mnem; + + if (nparams > 7) + return -EINVAL; + + memset(&c, 0, sizeof(c)); + c.op_to_vfn = cpu_to_be32(FW_CMD_OP(FW_PARAMS_CMD) | + FW_CMD_REQUEST | FW_CMD_WRITE | + FW_PARAMS_CMD_PFN(pf) | + FW_PARAMS_CMD_VFN(vf)); + c.retval_len16 = cpu_to_be32(FW_LEN16(c)); + + while (nparams--) { + *p++ = cpu_to_be32(*params++); + *p++ = cpu_to_be32(*val++); + } + + return t4_wr_mbox_ns(adap, mbox, &c, sizeof(c), NULL); +} + /** * t4_set_params - sets FW or device parameters * @adap: the adapter @@ -3498,6 +3538,33 @@ int t4_set_addr_hash(struct adapter *adap, unsigned int mbox, unsigned int viid, return t4_wr_mbox_meat(adap, mbox, &c, sizeof(c), NULL, sleep_ok); } +/** + * t4_enable_vi_params - enable/disable a virtual interface + * @adap: the adapter + * @mbox: mailbox to use for the FW command + * @viid: the VI id + * @rx_en: 1=enable Rx, 0=disable Rx + * @tx_en: 1=enable Tx, 0=disable Tx + * @dcb_en: 1=enable delivery of Data Center Bridging messages. + * + * Enables/disables a virtual interface. Note that setting DCB Enable + * only makes sense when enabling a Virtual Interface ... + */ +int t4_enable_vi_params(struct adapter *adap, unsigned int mbox, + unsigned int viid, bool rx_en, bool tx_en, bool dcb_en) +{ + struct fw_vi_enable_cmd c; + + memset(&c, 0, sizeof(c)); + c.op_to_viid = htonl(FW_CMD_OP(FW_VI_ENABLE_CMD) | FW_CMD_REQUEST | + FW_CMD_EXEC | FW_VI_ENABLE_CMD_VIID(viid)); + + c.ien_to_len16 = htonl(FW_VI_ENABLE_CMD_IEN(rx_en) | + FW_VI_ENABLE_CMD_EEN(tx_en) | FW_LEN16(c) | + FW_VI_ENABLE_CMD_DCB_INFO(dcb_en)); + return t4_wr_mbox(adap, mbox, &c, sizeof(c), NULL); +} + /** * t4_enable_vi - enable/disable a virtual interface * @adap: the adapter @@ -3511,14 +3578,7 @@ int t4_set_addr_hash(struct adapter *adap, unsigned int mbox, unsigned int viid, int t4_enable_vi(struct adapter *adap, unsigned int mbox, unsigned int viid, bool rx_en, bool tx_en) { - struct fw_vi_enable_cmd c; - - memset(&c, 0, sizeof(c)); - c.op_to_viid = htonl(FW_CMD_OP(FW_VI_ENABLE_CMD) | FW_CMD_REQUEST | - FW_CMD_EXEC | FW_VI_ENABLE_CMD_VIID(viid)); - c.ien_to_len16 = htonl(FW_VI_ENABLE_CMD_IEN(rx_en) | - FW_VI_ENABLE_CMD_EEN(tx_en) | FW_LEN16(c)); - return t4_wr_mbox(adap, mbox, &c, sizeof(c), NULL); + return t4_enable_vi_params(adap, mbox, viid, rx_en, tx_en, 0); } /** -- 2.20.1