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Date: Mon, 22 Apr 2024 15:23:59 +0530
From: Geetha sowjanya <gakula@...vell.com>
To: <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC: <kuba@...nel.org>, <davem@...emloft.net>, <pabeni@...hat.com>,
<edumazet@...gle.com>, <sgoutham@...vell.com>, <gakula@...vell.com>,
<sbhatta@...vell.com>, <hkelam@...vell.com>
Subject: [net-next PATCH v2 7/9] octeontx2-pf: Add support to sync link state between representor and VFs
Implements mbox function to sync the link state between VFs and
its representors. Same mbox is use to notify other updates like mtu etc.
This patch enables
- Reflecting the link state of representor based on the VF state and
link state of VF based on representor.
- On VF interface up/down a notification is sent via mbox to representor
to update the link state.
- On representor interafce up/down will cause the link state update of VF.
Signed-off-by: Harman Kalra <hkalra@...vell.com>
Signed-off-by: Geetha sowjanya <gakula@...vell.com>
---
.../net/ethernet/marvell/octeontx2/af/mbox.h | 25 ++++
.../net/ethernet/marvell/octeontx2/af/rvu.h | 11 ++
.../ethernet/marvell/octeontx2/af/rvu_nix.c | 6 +
.../ethernet/marvell/octeontx2/af/rvu_rep.c | 127 ++++++++++++++++++
.../marvell/octeontx2/nic/otx2_common.h | 2 +
.../ethernet/marvell/octeontx2/nic/otx2_pf.c | 30 +++++
.../net/ethernet/marvell/octeontx2/nic/rep.c | 76 +++++++++++
.../net/ethernet/marvell/octeontx2/nic/rep.h | 3 +
8 files changed, 280 insertions(+)
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/mbox.h b/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
index b7f250d218d9..8f099b05ba10 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
+++ b/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
@@ -145,6 +145,7 @@ M(SET_VF_PERM, 0x00b, set_vf_perm, set_vf_perm, msg_rsp) \
M(PTP_GET_CAP, 0x00c, ptp_get_cap, msg_req, ptp_get_cap_rsp) \
M(GET_REP_CNT, 0x00d, get_rep_cnt, msg_req, get_rep_cnt_rsp) \
M(ESW_CFG, 0x00e, esw_cfg, esw_cfg_req, msg_rsp) \
+M(REP_EVENT_NOTIFY, 0x00f, rep_event_notify, rep_event, msg_rsp) \
/* CGX mbox IDs (range 0x200 - 0x3FF) */ \
M(CGX_START_RXTX, 0x200, cgx_start_rxtx, msg_req, msg_rsp) \
M(CGX_STOP_RXTX, 0x201, cgx_stop_rxtx, msg_req, msg_rsp) \
@@ -382,12 +383,16 @@ M(CPT_INST_LMTST, 0xD00, cpt_inst_lmtst, cpt_inst_lmtst_req, msg_rsp)
#define MBOX_UP_MCS_MESSAGES \
M(MCS_INTR_NOTIFY, 0xE00, mcs_intr_notify, mcs_intr_info, msg_rsp)
+#define MBOX_UP_REP_MESSAGES \
+M(REP_EVENT_UP_NOTIFY, 0xEF0, rep_event_up_notify, rep_event, msg_rsp) \
+
enum {
#define M(_name, _id, _1, _2, _3) MBOX_MSG_ ## _name = _id,
MBOX_MESSAGES
MBOX_UP_CGX_MESSAGES
MBOX_UP_CPT_MESSAGES
MBOX_UP_MCS_MESSAGES
+MBOX_UP_REP_MESSAGES
#undef M
};
@@ -1571,6 +1576,26 @@ struct esw_cfg_req {
u64 rsvd;
};
+struct rep_evt_data {
+ u8 port_state;
+ u8 vf_state;
+ u16 rx_mode;
+ u16 rx_flags;
+ u16 mtu;
+ u64 rsvd[5];
+};
+
+struct rep_event {
+ struct mbox_msghdr hdr;
+ u16 pcifunc;
+#define RVU_EVENT_PORT_STATE BIT_ULL(0)
+#define RVU_EVENT_PFVF_STATE BIT_ULL(1)
+#define RVU_EVENT_MTU_CHANGE BIT_ULL(2)
+#define RVU_EVENT_RX_MODE_CHANGE BIT_ULL(3)
+ u16 event;
+ struct rep_evt_data evt_data;
+};
+
struct flow_msg {
unsigned char dmac[6];
unsigned char smac[6];
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu.h b/drivers/net/ethernet/marvell/octeontx2/af/rvu.h
index c8572d79a968..7556ce0a772e 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu.h
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu.h
@@ -512,6 +512,11 @@ struct rvu_switch {
u16 start_entry;
};
+struct rep_evtq_ent {
+ struct list_head node;
+ struct rep_event event;
+};
+
struct rvu {
void __iomem *afreg_base;
void __iomem *pfreg_base;
@@ -597,6 +602,11 @@ struct rvu {
int rep_cnt;
u16 *rep2pfvf_map;
u8 rep_mode;
+ struct work_struct rep_evt_work;
+ struct workqueue_struct *rep_evt_wq;
+ struct list_head rep_evtq_head;
+ /* Representor event lock */
+ spinlock_t rep_evtq_lock;
};
static inline void rvu_write64(struct rvu *rvu, u64 block, u64 offset, u64 val)
@@ -1044,4 +1054,5 @@ void rvu_mcs_exit(struct rvu *rvu);
int rvu_rep_pf_init(struct rvu *rvu);
int rvu_rep_install_mcam_rules(struct rvu *rvu);
void rvu_rep_update_rules(struct rvu *rvu, u16 pcifunc, bool ena);
+int rvu_rep_notify_pfvf_state(struct rvu *rvu, u16 pcifunc, bool enable);
#endif /* RVU_H */
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
index df019c68ae6c..b1206c5b8c80 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
@@ -379,6 +379,9 @@ static int nix_interface_init(struct rvu *rvu, u16 pcifunc, int type, int nixlf,
cgx_set_pkind(rvu_cgx_pdata(cgx_id, rvu), lmac_id, pkind);
rvu_npc_set_pkind(rvu, pkind, pfvf);
+ if (rvu->rep_mode)
+ rvu_rep_notify_pfvf_state(rvu, pcifunc, true);
+
break;
case NIX_INTF_TYPE_LBK:
vf = (pcifunc & RVU_PFVF_FUNC_MASK) - 1;
@@ -515,6 +518,9 @@ static void nix_interface_deinit(struct rvu *rvu, u16 pcifunc, u8 nixlf)
/* Disable DMAC filters used */
rvu_cgx_disable_dmac_entries(rvu, pcifunc);
+
+ if (rvu->rep_mode)
+ rvu_rep_notify_pfvf_state(rvu, pcifunc, false);
}
#define NIX_BPIDS_PER_LMAC 8
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_rep.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_rep.c
index dd7d60a626c0..6050ac62fc71 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_rep.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_rep.c
@@ -13,6 +13,124 @@
#include "rvu.h"
#include "rvu_reg.h"
+#define M(_name, _id, _fn_name, _req_type, _rsp_type) \
+static struct _req_type __maybe_unused \
+*otx2_mbox_alloc_msg_ ## _fn_name(struct rvu *rvu, int devid) \
+{ \
+ struct _req_type *req; \
+ \
+ req = (struct _req_type *)otx2_mbox_alloc_msg_rsp( \
+ &rvu->afpf_wq_info.mbox_up, devid, sizeof(struct _req_type), \
+ sizeof(struct _rsp_type)); \
+ if (!req) \
+ return NULL; \
+ req->hdr.sig = OTX2_MBOX_REQ_SIG; \
+ req->hdr.id = _id; \
+ return req; \
+}
+
+MBOX_UP_REP_MESSAGES
+#undef M
+
+static int rvu_rep_up_notify(struct rvu *rvu, struct rep_event *event)
+{
+ struct rep_event *msg;
+ int pf;
+
+ pf = rvu_get_pf(event->pcifunc);
+
+ mutex_lock(&rvu->mbox_lock);
+ msg = otx2_mbox_alloc_msg_rep_event_up_notify(rvu, pf);
+ if (!msg) {
+ mutex_unlock(&rvu->mbox_lock);
+ return -ENOMEM;
+ }
+
+ msg->hdr.pcifunc = event->pcifunc;
+ msg->event = event->event;
+
+ memcpy(&msg->evt_data, &event->evt_data, sizeof(struct rep_evt_data));
+
+ otx2_mbox_wait_for_zero(&rvu->afpf_wq_info.mbox_up, pf);
+
+ otx2_mbox_msg_send_up(&rvu->afpf_wq_info.mbox_up, pf);
+
+ mutex_unlock(&rvu->mbox_lock);
+ return 0;
+}
+
+static void rvu_rep_wq_handler(struct work_struct *work)
+{
+ struct rvu *rvu = container_of(work, struct rvu, rep_evt_work);
+ struct rep_evtq_ent *qentry;
+ struct rep_event *event;
+ unsigned long flags;
+
+ do {
+ spin_lock_irqsave(&rvu->rep_evtq_lock, flags);
+ qentry = list_first_entry_or_null(&rvu->rep_evtq_head,
+ struct rep_evtq_ent,
+ node);
+ if (qentry)
+ list_del(&qentry->node);
+
+ spin_unlock_irqrestore(&rvu->rep_evtq_lock, flags);
+ if (!qentry)
+ break; /* nothing more to process */
+
+ event = &qentry->event;
+
+ rvu_rep_up_notify(rvu, event);
+ kfree(qentry);
+ } while (1);
+}
+
+int rvu_mbox_handler_rep_event_notify(struct rvu *rvu, struct rep_event *req,
+ struct msg_rsp *rsp)
+{
+ struct rep_evtq_ent *qentry;
+
+ qentry = kmalloc(sizeof(*qentry), GFP_ATOMIC);
+ if (!qentry)
+ return -ENOMEM;
+
+ qentry->event = *req;
+ spin_lock(&rvu->rep_evtq_lock);
+ list_add_tail(&qentry->node, &rvu->rep_evtq_head);
+ spin_unlock(&rvu->rep_evtq_lock);
+ queue_work(rvu->rep_evt_wq, &rvu->rep_evt_work);
+ return 0;
+}
+
+int rvu_rep_notify_pfvf_state(struct rvu *rvu, u16 pcifunc, bool enable)
+{
+ struct rep_event *req;
+ int pf;
+
+ if (!is_pf_cgxmapped(rvu, rvu_get_pf(pcifunc)))
+ return 0;
+
+ pf = rvu_get_pf(rvu->rep_pcifunc);
+
+ mutex_lock(&rvu->mbox_lock);
+ req = otx2_mbox_alloc_msg_rep_event_up_notify(rvu, pf);
+ if (!req) {
+ mutex_unlock(&rvu->mbox_lock);
+ return -ENOMEM;
+ }
+
+ req->hdr.pcifunc = rvu->rep_pcifunc;
+ req->event |= RVU_EVENT_PFVF_STATE;
+ req->pcifunc = pcifunc;
+ req->evt_data.vf_state = enable;
+
+ otx2_mbox_wait_for_zero(&rvu->afpf_wq_info.mbox_up, pf);
+ otx2_mbox_msg_send_up(&rvu->afpf_wq_info.mbox_up, pf);
+
+ mutex_unlock(&rvu->mbox_lock);
+ return 0;
+}
+
#define RVU_LF_RX_STATS(reg) \
rvu_read64(rvu, blkaddr, NIX_AF_LFX_RX_STATX(nixlf, reg))
@@ -241,6 +359,15 @@ int rvu_rep_install_mcam_rules(struct rvu *rvu)
}
}
}
+
+ /* Initialize the wq for handling REP events */
+ INIT_LIST_HEAD(&rvu->rep_evtq_head);
+ INIT_WORK(&rvu->rep_evt_work, rvu_rep_wq_handler);
+ rvu->rep_evt_wq = alloc_workqueue("rep_evt_wq", 0, 0);
+ if (!rvu->rep_evt_wq) {
+ dev_err(rvu->dev, "REP workqueue allocation failed\n");
+ return -ENOMEM;
+ }
return 0;
}
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
index 79ec86035c16..865d5d3146a9 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
@@ -441,6 +441,7 @@ struct otx2_nic {
#define OTX2_FLAG_PTP_ONESTEP_SYNC BIT_ULL(15)
#define OTX2_FLAG_ADPTV_INT_COAL_ENABLED BIT_ULL(16)
#define OTX2_FLAG_REP_MODE_ENABLED BIT_ULL(17)
+#define OTX2_FLAG_PORT_UP BIT_ULL(18)
u64 flags;
u64 *cq_op_addr;
@@ -1125,4 +1126,5 @@ u16 otx2_select_queue(struct net_device *netdev, struct sk_buff *skb,
int otx2_get_txq_by_classid(struct otx2_nic *pfvf, u16 classid);
void otx2_qos_config_txschq(struct otx2_nic *pfvf);
void otx2_clean_qos_queues(struct otx2_nic *pfvf);
+int rvu_event_up_notify(struct otx2_nic *pf, struct rep_event *info);
#endif /* OTX2_COMMON_H */
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
index 119c99768a85..2a1bc8cdea19 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
@@ -519,6 +519,7 @@ static void otx2_pfvf_mbox_up_handler(struct work_struct *work)
switch (msg->id) {
case MBOX_MSG_CGX_LINK_EVENT:
+ case MBOX_MSG_REP_EVENT_UP_NOTIFY:
break;
default:
if (msg->rc)
@@ -832,6 +833,9 @@ static void otx2_handle_link_event(struct otx2_nic *pf)
struct cgx_link_user_info *linfo = &pf->linfo;
struct net_device *netdev = pf->netdev;
+ if (pf->flags & OTX2_FLAG_PORT_UP)
+ return;
+
pr_info("%s NIC Link is %s %d Mbps %s duplex\n", netdev->name,
linfo->link_up ? "UP" : "DOWN", linfo->speed,
linfo->full_duplex ? "Full" : "Half");
@@ -844,6 +848,30 @@ static void otx2_handle_link_event(struct otx2_nic *pf)
}
}
+static int otx2_mbox_up_handler_rep_event_up_notify(struct otx2_nic *pf,
+ struct rep_event *info,
+ struct msg_rsp *rsp)
+{
+ struct net_device *netdev = pf->netdev;
+
+ if (info->event == RVU_EVENT_PORT_STATE) {
+ if (info->evt_data.port_state) {
+ pf->flags |= OTX2_FLAG_PORT_UP;
+ netif_carrier_on(netdev);
+ netif_tx_start_all_queues(netdev);
+ } else {
+ pf->flags &= ~OTX2_FLAG_PORT_UP;
+ netif_tx_stop_all_queues(netdev);
+ netif_carrier_off(netdev);
+ }
+ return 0;
+ }
+#ifdef CONFIG_RVU_ESWITCH
+ rvu_event_up_notify(pf, info);
+#endif
+ return 0;
+}
+
int otx2_mbox_up_handler_mcs_intr_notify(struct otx2_nic *pf,
struct mcs_intr_info *event,
struct msg_rsp *rsp)
@@ -913,6 +941,7 @@ static int otx2_process_mbox_msg_up(struct otx2_nic *pf,
}
MBOX_UP_CGX_MESSAGES
MBOX_UP_MCS_MESSAGES
+MBOX_UP_REP_MESSAGES
#undef M
break;
default:
@@ -1967,6 +1996,7 @@ int otx2_open(struct net_device *netdev)
}
pf->flags &= ~OTX2_FLAG_INTF_DOWN;
+ pf->flags &= ~OTX2_FLAG_PORT_UP;
/* 'intf_down' may be checked on any cpu */
smp_wmb();
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/rep.c b/drivers/net/ethernet/marvell/octeontx2/nic/rep.c
index 88afe285d3e9..304c8bb2812d 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/rep.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/rep.c
@@ -28,6 +28,57 @@ MODULE_DESCRIPTION(DRV_STRING);
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, rvu_rep_id_table);
+static int rvu_rep_get_repid(struct otx2_nic *priv, u16 pcifunc)
+{
+ int rep_id;
+
+ for (rep_id = 0; rep_id < priv->rep_cnt; rep_id++)
+ if (priv->rep_pf_map[rep_id] == pcifunc)
+ return rep_id;
+ return -EINVAL;
+}
+
+static int rvu_rep_notify_pfvf(struct otx2_nic *priv, u16 event,
+ struct rep_event *data)
+{
+ struct rep_event *req;
+
+ mutex_lock(&priv->mbox.lock);
+ req = otx2_mbox_alloc_msg_rep_event_notify(&priv->mbox);
+ if (!req) {
+ mutex_unlock(&priv->mbox.lock);
+ return -ENOMEM;
+ }
+ req->event = event;
+ req->pcifunc = data->pcifunc;
+
+ memcpy(&req->evt_data, &data->evt_data, sizeof(struct rep_evt_data));
+ otx2_sync_mbox_msg(&priv->mbox);
+ mutex_unlock(&priv->mbox.lock);
+ return 0;
+}
+
+static void rvu_rep_state_evt_handler(struct otx2_nic *priv,
+ struct rep_event *info)
+{
+ struct rep_dev *rep;
+ int rep_id;
+
+ rep_id = rvu_rep_get_repid(priv, info->pcifunc);
+ rep = priv->reps[rep_id];
+ if (info->evt_data.vf_state)
+ rep->flags |= RVU_REP_VF_INITIALIZED;
+ else
+ rep->flags &= ~RVU_REP_VF_INITIALIZED;
+}
+
+int rvu_event_up_notify(struct otx2_nic *pf, struct rep_event *info)
+{
+ if (info->event & RVU_EVENT_PFVF_STATE)
+ rvu_rep_state_evt_handler(pf, info);
+ return 0;
+}
+
static void rvu_rep_get_stats(struct work_struct *work)
{
struct delayed_work *del_work = to_delayed_work(work);
@@ -77,6 +128,9 @@ static void rvu_rep_get_stats64(struct net_device *dev, struct rtnl_link_stats64
{
struct rep_dev *rep = netdev_priv(dev);
+ if (!(rep->flags & RVU_REP_VF_INITIALIZED))
+ return;
+
stats->rx_packets = rep->stats.rx_frames;
stats->rx_bytes = rep->stats.rx_bytes;
stats->rx_dropped = rep->stats.rx_drops;
@@ -131,16 +185,38 @@ static netdev_tx_t rvu_rep_xmit(struct sk_buff *skb, struct net_device *dev)
static int rvu_rep_open(struct net_device *dev)
{
+ struct rep_dev *rep = netdev_priv(dev);
+ struct otx2_nic *priv = rep->mdev;
+ struct rep_event evt = {0};
+
+ if (!(rep->flags & RVU_REP_VF_INITIALIZED))
+ return 0;
+
netif_carrier_on(dev);
netif_tx_start_all_queues(dev);
+
+ evt.event = RVU_EVENT_PORT_STATE;
+ evt.evt_data.port_state = 1;
+ evt.pcifunc = rep->pcifunc;
+ rvu_rep_notify_pfvf(priv, RVU_EVENT_PORT_STATE, &evt);
return 0;
}
static int rvu_rep_stop(struct net_device *dev)
{
+ struct rep_dev *rep = netdev_priv(dev);
+ struct otx2_nic *priv = rep->mdev;
+ struct rep_event evt = {0};
+
+ if (!(rep->flags & RVU_REP_VF_INITIALIZED))
+ return 0;
+
netif_carrier_off(dev);
netif_tx_disable(dev);
+ evt.event = RVU_EVENT_PORT_STATE;
+ evt.pcifunc = rep->pcifunc;
+ rvu_rep_notify_pfvf(priv, RVU_EVENT_PORT_STATE, &evt);
return 0;
}
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/rep.h b/drivers/net/ethernet/marvell/octeontx2/nic/rep.h
index 9526b886b173..c0bbb383ab88 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/rep.h
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/rep.h
@@ -36,6 +36,8 @@ struct rep_dev {
struct delayed_work stats_wrk;
u16 rep_id;
u16 pcifunc;
+#define RVU_REP_VF_INITIALIZED BIT_ULL(0)
+ u8 flags;
};
static inline bool is_rep_dev(struct pci_dev *pdev)
@@ -45,4 +47,5 @@ static inline bool is_rep_dev(struct pci_dev *pdev)
int rvu_rep_create(struct otx2_nic *priv);
void rvu_rep_destroy(struct otx2_nic *priv);
+int rvu_event_up_notify(struct otx2_nic *pf, struct rep_event *info);
#endif /* REP_H */
--
2.25.1
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