diff options
Diffstat (limited to 'drivers/net/ethernet/marvell/octeontx2/af/rvu_cgx.c')
| -rw-r--r-- | drivers/net/ethernet/marvell/octeontx2/af/rvu_cgx.c | 515 |
1 files changed, 515 insertions, 0 deletions
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_cgx.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_cgx.c new file mode 100644 index 000000000000..188185c15b4a --- /dev/null +++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_cgx.c @@ -0,0 +1,515 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Marvell OcteonTx2 RVU Admin Function driver + * + * Copyright (C) 2018 Marvell International Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/types.h> +#include <linux/module.h> +#include <linux/pci.h> + +#include "rvu.h" +#include "cgx.h" + +struct cgx_evq_entry { + struct list_head evq_node; + struct cgx_link_event link_event; +}; + +#define M(_name, _id, _req_type, _rsp_type) \ +static struct _req_type __maybe_unused \ +*otx2_mbox_alloc_msg_ ## _name(struct rvu *rvu, int devid) \ +{ \ + struct _req_type *req; \ + \ + req = (struct _req_type *)otx2_mbox_alloc_msg_rsp( \ + &rvu->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_CGX_MESSAGES +#undef M + +/* Returns bitmap of mapped PFs */ +static inline u16 cgxlmac_to_pfmap(struct rvu *rvu, u8 cgx_id, u8 lmac_id) +{ + return rvu->cgxlmac2pf_map[CGX_OFFSET(cgx_id) + lmac_id]; +} + +static inline u8 cgxlmac_id_to_bmap(u8 cgx_id, u8 lmac_id) +{ + return ((cgx_id & 0xF) << 4) | (lmac_id & 0xF); +} + +void *rvu_cgx_pdata(u8 cgx_id, struct rvu *rvu) +{ + if (cgx_id >= rvu->cgx_cnt) + return NULL; + + return rvu->cgx_idmap[cgx_id]; +} + +static int rvu_map_cgx_lmac_pf(struct rvu *rvu) +{ + struct npc_pkind *pkind = &rvu->hw->pkind; + int cgx_cnt = rvu->cgx_cnt; + int cgx, lmac_cnt, lmac; + int pf = PF_CGXMAP_BASE; + int size, free_pkind; + + if (!cgx_cnt) + return 0; + + if (cgx_cnt > 0xF || MAX_LMAC_PER_CGX > 0xF) + return -EINVAL; + + /* Alloc map table + * An additional entry is required since PF id starts from 1 and + * hence entry at offset 0 is invalid. + */ + size = (cgx_cnt * MAX_LMAC_PER_CGX + 1) * sizeof(u8); + rvu->pf2cgxlmac_map = devm_kzalloc(rvu->dev, size, GFP_KERNEL); + if (!rvu->pf2cgxlmac_map) + return -ENOMEM; + + /* Initialize offset 0 with an invalid cgx and lmac id */ + rvu->pf2cgxlmac_map[0] = 0xFF; + + /* Reverse map table */ + rvu->cgxlmac2pf_map = devm_kzalloc(rvu->dev, + cgx_cnt * MAX_LMAC_PER_CGX * sizeof(u16), + GFP_KERNEL); + if (!rvu->cgxlmac2pf_map) + return -ENOMEM; + + rvu->cgx_mapped_pfs = 0; + for (cgx = 0; cgx < cgx_cnt; cgx++) { + lmac_cnt = cgx_get_lmac_cnt(rvu_cgx_pdata(cgx, rvu)); + for (lmac = 0; lmac < lmac_cnt; lmac++, pf++) { + rvu->pf2cgxlmac_map[pf] = cgxlmac_id_to_bmap(cgx, lmac); + rvu->cgxlmac2pf_map[CGX_OFFSET(cgx) + lmac] = 1 << pf; + free_pkind = rvu_alloc_rsrc(&pkind->rsrc); + pkind->pfchan_map[free_pkind] = ((pf) & 0x3F) << 16; + rvu->cgx_mapped_pfs++; + } + } + return 0; +} + +static int rvu_cgx_send_link_info(int cgx_id, int lmac_id, struct rvu *rvu) +{ + struct cgx_evq_entry *qentry; + unsigned long flags; + int err; + + qentry = kmalloc(sizeof(*qentry), GFP_KERNEL); + if (!qentry) + return -ENOMEM; + + /* Lock the event queue before we read the local link status */ + spin_lock_irqsave(&rvu->cgx_evq_lock, flags); + err = cgx_get_link_info(rvu_cgx_pdata(cgx_id, rvu), lmac_id, + &qentry->link_event.link_uinfo); + qentry->link_event.cgx_id = cgx_id; + qentry->link_event.lmac_id = lmac_id; + if (err) + goto skip_add; + list_add_tail(&qentry->evq_node, &rvu->cgx_evq_head); +skip_add: + spin_unlock_irqrestore(&rvu->cgx_evq_lock, flags); + + /* start worker to process the events */ + queue_work(rvu->cgx_evh_wq, &rvu->cgx_evh_work); + + return 0; +} + +/* This is called from interrupt context and is expected to be atomic */ +static int cgx_lmac_postevent(struct cgx_link_event *event, void *data) +{ + struct cgx_evq_entry *qentry; + struct rvu *rvu = data; + + /* post event to the event queue */ + qentry = kmalloc(sizeof(*qentry), GFP_ATOMIC); + if (!qentry) + return -ENOMEM; + qentry->link_event = *event; + spin_lock(&rvu->cgx_evq_lock); + list_add_tail(&qentry->evq_node, &rvu->cgx_evq_head); + spin_unlock(&rvu->cgx_evq_lock); + + /* start worker to process the events */ + queue_work(rvu->cgx_evh_wq, &rvu->cgx_evh_work); + + return 0; +} + +static void cgx_notify_pfs(struct cgx_link_event *event, struct rvu *rvu) +{ + struct cgx_link_user_info *linfo; + struct cgx_link_info_msg *msg; + unsigned long pfmap; + int err, pfid; + + linfo = &event->link_uinfo; + pfmap = cgxlmac_to_pfmap(rvu, event->cgx_id, event->lmac_id); + + do { + pfid = find_first_bit(&pfmap, 16); + clear_bit(pfid, &pfmap); + + /* check if notification is enabled */ + if (!test_bit(pfid, &rvu->pf_notify_bmap)) { + dev_info(rvu->dev, "cgx %d: lmac %d Link status %s\n", + event->cgx_id, event->lmac_id, + linfo->link_up ? "UP" : "DOWN"); + continue; + } + + /* Send mbox message to PF */ + msg = otx2_mbox_alloc_msg_CGX_LINK_EVENT(rvu, pfid); + if (!msg) + continue; + msg->link_info = *linfo; + otx2_mbox_msg_send(&rvu->mbox_up, pfid); + err = otx2_mbox_wait_for_rsp(&rvu->mbox_up, pfid); + if (err) + dev_warn(rvu->dev, "notification to pf %d failed\n", + pfid); + } while (pfmap); +} + +static void cgx_evhandler_task(struct work_struct *work) +{ + struct rvu *rvu = container_of(work, struct rvu, cgx_evh_work); + struct cgx_evq_entry *qentry; + struct cgx_link_event *event; + unsigned long flags; + + do { + /* Dequeue an event */ + spin_lock_irqsave(&rvu->cgx_evq_lock, flags); + qentry = list_first_entry_or_null(&rvu->cgx_evq_head, + struct cgx_evq_entry, + evq_node); + if (qentry) + list_del(&qentry->evq_node); + spin_unlock_irqrestore(&rvu->cgx_evq_lock, flags); + if (!qentry) + break; /* nothing more to process */ + + event = &qentry->link_event; + + /* process event */ + cgx_notify_pfs(event, rvu); + kfree(qentry); + } while (1); +} + +static void cgx_lmac_event_handler_init(struct rvu *rvu) +{ + struct cgx_event_cb cb; + int cgx, lmac, err; + void *cgxd; + + spin_lock_init(&rvu->cgx_evq_lock); + INIT_LIST_HEAD(&rvu->cgx_evq_head); + INIT_WORK(&rvu->cgx_evh_work, cgx_evhandler_task); + rvu->cgx_evh_wq = alloc_workqueue("rvu_evh_wq", 0, 0); + if (!rvu->cgx_evh_wq) { + dev_err(rvu->dev, "alloc workqueue failed"); + return; + } + + cb.notify_link_chg = cgx_lmac_postevent; /* link change call back */ + cb.data = rvu; + + for (cgx = 0; cgx < rvu->cgx_cnt; cgx++) { + cgxd = rvu_cgx_pdata(cgx, rvu); + for (lmac = 0; lmac < cgx_get_lmac_cnt(cgxd); lmac++) { + err = cgx_lmac_evh_register(&cb, cgxd, lmac); + if (err) + dev_err(rvu->dev, + "%d:%d handler register failed\n", + cgx, lmac); + } + } +} + +void rvu_cgx_wq_destroy(struct rvu *rvu) +{ + if (rvu->cgx_evh_wq) { + flush_workqueue(rvu->cgx_evh_wq); + destroy_workqueue(rvu->cgx_evh_wq); + rvu->cgx_evh_wq = NULL; + } +} + +int rvu_cgx_probe(struct rvu *rvu) +{ + int i, err; + + /* find available cgx ports */ + rvu->cgx_cnt = cgx_get_cgx_cnt(); + if (!rvu->cgx_cnt) { + dev_info(rvu->dev, "No CGX devices found!\n"); + return -ENODEV; + } + + rvu->cgx_idmap = devm_kzalloc(rvu->dev, rvu->cgx_cnt * sizeof(void *), + GFP_KERNEL); + if (!rvu->cgx_idmap) + return -ENOMEM; + + /* Initialize the cgxdata table */ + for (i = 0; i < rvu->cgx_cnt; i++) + rvu->cgx_idmap[i] = cgx_get_pdata(i); + + /* Map CGX LMAC interfaces to RVU PFs */ + err = rvu_map_cgx_lmac_pf(rvu); + if (err) + return err; + + /* Register for CGX events */ + cgx_lmac_event_handler_init(rvu); + return 0; +} + +int rvu_cgx_config_rxtx(struct rvu *rvu, u16 pcifunc, bool start) +{ + int pf = rvu_get_pf(pcifunc); + u8 cgx_id, lmac_id; + + /* This msg is expected only from PFs that are mapped to CGX LMACs, + * if received from other PF/VF simply ACK, nothing to do. + */ + if ((pcifunc & RVU_PFVF_FUNC_MASK) || !is_pf_cgxmapped(rvu, pf)) + return -ENODEV; + + rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id); + + cgx_lmac_rx_tx_enable(rvu_cgx_pdata(cgx_id, rvu), lmac_id, start); + + return 0; +} + +int rvu_mbox_handler_CGX_START_RXTX(struct rvu *rvu, struct msg_req *req, + struct msg_rsp *rsp) +{ + rvu_cgx_config_rxtx(rvu, req->hdr.pcifunc, true); + return 0; +} + +int rvu_mbox_handler_CGX_STOP_RXTX(struct rvu *rvu, struct msg_req *req, + struct msg_rsp *rsp) +{ + rvu_cgx_config_rxtx(rvu, req->hdr.pcifunc, false); + return 0; +} + +int rvu_mbox_handler_CGX_STATS(struct rvu *rvu, struct msg_req *req, + struct cgx_stats_rsp *rsp) +{ + int pf = rvu_get_pf(req->hdr.pcifunc); + int stat = 0, err = 0; + u64 tx_stat, rx_stat; + u8 cgx_idx, lmac; + void *cgxd; + + if ((req->hdr.pcifunc & RVU_PFVF_FUNC_MASK) || + !is_pf_cgxmapped(rvu, pf)) + return -ENODEV; + + rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_idx, &lmac); + cgxd = rvu_cgx_pdata(cgx_idx, rvu); + + /* Rx stats */ + while (stat < CGX_RX_STATS_COUNT) { + err = cgx_get_rx_stats(cgxd, lmac, stat, &rx_stat); + if (err) + return err; + rsp->rx_stats[stat] = rx_stat; + stat++; + } + + /* Tx stats */ + stat = 0; + while (stat < CGX_TX_STATS_COUNT) { + err = cgx_get_tx_stats(cgxd, lmac, stat, &tx_stat); + if (err) + return err; + rsp->tx_stats[stat] = tx_stat; + stat++; + } + return 0; +} + +int rvu_mbox_handler_CGX_MAC_ADDR_SET(struct rvu *rvu, + struct cgx_mac_addr_set_or_get *req, + struct cgx_mac_addr_set_or_get *rsp) +{ + int pf = rvu_get_pf(req->hdr.pcifunc); + u8 cgx_id, lmac_id; + + rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id); + + cgx_lmac_addr_set(cgx_id, lmac_id, req->mac_addr); + + return 0; +} + +int rvu_mbox_handler_CGX_MAC_ADDR_GET(struct rvu *rvu, + struct cgx_mac_addr_set_or_get *req, + struct cgx_mac_addr_set_or_get *rsp) +{ + int pf = rvu_get_pf(req->hdr.pcifunc); + u8 cgx_id, lmac_id; + int rc = 0, i; + u64 cfg; + + rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id); + + rsp->hdr.rc = rc; + cfg = cgx_lmac_addr_get(cgx_id, lmac_id); + /* copy 48 bit mac address to req->mac_addr */ + for (i = 0; i < ETH_ALEN; i++) + rsp->mac_addr[i] = cfg >> (ETH_ALEN - 1 - i) * 8; + return 0; +} + +int rvu_mbox_handler_CGX_PROMISC_ENABLE(struct rvu *rvu, struct msg_req *req, + struct msg_rsp *rsp) +{ + u16 pcifunc = req->hdr.pcifunc; + int pf = rvu_get_pf(pcifunc); + u8 cgx_id, lmac_id; + + /* This msg is expected only from PFs that are mapped to CGX LMACs, + * if received from other PF/VF simply ACK, nothing to do. + */ + if ((req->hdr.pcifunc & RVU_PFVF_FUNC_MASK) || + !is_pf_cgxmapped(rvu, pf)) + return -ENODEV; + + rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id); + + cgx_lmac_promisc_config(cgx_id, lmac_id, true); + return 0; +} + +int rvu_mbox_handler_CGX_PROMISC_DISABLE(struct rvu *rvu, struct msg_req *req, + struct msg_rsp *rsp) +{ + u16 pcifunc = req->hdr.pcifunc; + int pf = rvu_get_pf(pcifunc); + u8 cgx_id, lmac_id; + + /* This msg is expected only from PFs that are mapped to CGX LMACs, + * if received from other PF/VF simply ACK, nothing to do. + */ + if ((req->hdr.pcifunc & RVU_PFVF_FUNC_MASK) || + !is_pf_cgxmapped(rvu, pf)) + return -ENODEV; + + rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id); + + cgx_lmac_promisc_config(cgx_id, lmac_id, false); + return 0; +} + +static int rvu_cgx_config_linkevents(struct rvu *rvu, u16 pcifunc, bool en) +{ + int pf = rvu_get_pf(pcifunc); + u8 cgx_id, lmac_id; + + /* This msg is expected only from PFs that are mapped to CGX LMACs, + * if received from other PF/VF simply ACK, nothing to do. + */ + if ((pcifunc & RVU_PFVF_FUNC_MASK) || !is_pf_cgxmapped(rvu, pf)) + return -ENODEV; + + rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id); + + if (en) { + set_bit(pf, &rvu->pf_notify_bmap); + /* Send the current link status to PF */ + rvu_cgx_send_link_info(cgx_id, lmac_id, rvu); + } else { + clear_bit(pf, &rvu->pf_notify_bmap); + } + + return 0; +} + +int rvu_mbox_handler_CGX_START_LINKEVENTS(struct rvu *rvu, struct msg_req *req, + struct msg_rsp *rsp) +{ + rvu_cgx_config_linkevents(rvu, req->hdr.pcifunc, true); + return 0; +} + +int rvu_mbox_handler_CGX_STOP_LINKEVENTS(struct rvu *rvu, struct msg_req *req, + struct msg_rsp *rsp) +{ + rvu_cgx_config_linkevents(rvu, req->hdr.pcifunc, false); + return 0; +} + +int rvu_mbox_handler_CGX_GET_LINKINFO(struct rvu *rvu, struct msg_req *req, + struct cgx_link_info_msg *rsp) +{ + u8 cgx_id, lmac_id; + int pf, err; + + pf = rvu_get_pf(req->hdr.pcifunc); + + if (!is_pf_cgxmapped(rvu, pf)) + return -ENODEV; + + rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id); + + err = cgx_get_link_info(rvu_cgx_pdata(cgx_id, rvu), lmac_id, + &rsp->link_info); + return err; +} + +static int rvu_cgx_config_intlbk(struct rvu *rvu, u16 pcifunc, bool en) +{ + int pf = rvu_get_pf(pcifunc); + u8 cgx_id, lmac_id; + + /* This msg is expected only from PFs that are mapped to CGX LMACs, + * if received from other PF/VF simply ACK, nothing to do. + */ + if ((pcifunc & RVU_PFVF_FUNC_MASK) || !is_pf_cgxmapped(rvu, pf)) + return -ENODEV; + + rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id); + + return cgx_lmac_internal_loopback(rvu_cgx_pdata(cgx_id, rvu), + lmac_id, en); +} + +int rvu_mbox_handler_CGX_INTLBK_ENABLE(struct rvu *rvu, struct msg_req *req, + struct msg_rsp *rsp) +{ + rvu_cgx_config_intlbk(rvu, req->hdr.pcifunc, true); + return 0; +} + +int rvu_mbox_handler_CGX_INTLBK_DISABLE(struct rvu *rvu, struct msg_req *req, + struct msg_rsp *rsp) +{ + rvu_cgx_config_intlbk(rvu, req->hdr.pcifunc, false); + return 0; +} |