From 92dc87697e6a71675a9e9eec04ebecd8cf4837a3 Mon Sep 17 00:00:00 2001 From: Sunil Goutham Date: Sun, 30 Aug 2015 12:29:15 +0300 Subject: [PATCH] net: thunderx: Support for upto 96 queues for a VF This patch adds support for handling multiple qsets assigned to a single VF. There by increasing no of queues from earlier 8 to max no of CPUs in the system i.e 48 queues on a single node and 96 on dual node system. User doesn't have option to assign which Qsets/VFs to be merged. Upon request from VF, PF assigns next free Qsets as secondary qsets. To maintain current behavior no of queues is kept to 8 by default which can be increased via ethtool. If user wants to unbind NICVF driver from a secondary Qset then it should be done after tearing down primary VF's interface. Signed-off-by: Sunil Goutham Signed-off-by: Aleksey Makarov Signed-off-by: Robert Richter Signed-off-by: David S. Miller --- drivers/net/ethernet/cavium/thunder/nic.h | 42 +++- .../net/ethernet/cavium/thunder/nic_main.c | 173 +++++++++++++-- .../ethernet/cavium/thunder/nicvf_ethtool.c | 134 ++++++++--- .../net/ethernet/cavium/thunder/nicvf_main.c | 210 ++++++++++++++++-- .../ethernet/cavium/thunder/nicvf_queues.c | 30 ++- 5 files changed, 505 insertions(+), 84 deletions(-) diff --git a/drivers/net/ethernet/cavium/thunder/nic.h b/drivers/net/ethernet/cavium/thunder/nic.h index 89b997e07313..35b2ee1bc07e 100644 --- a/drivers/net/ethernet/cavium/thunder/nic.h +++ b/drivers/net/ethernet/cavium/thunder/nic.h @@ -258,13 +258,23 @@ struct nicvf_drv_stats { }; struct nicvf { + struct nicvf *pnicvf; struct net_device *netdev; struct pci_dev *pdev; u8 vf_id; u8 node; - u8 tns_mode; + u8 tns_mode:1; + u8 sqs_mode:1; u16 mtu; struct queue_set *qs; +#define MAX_SQS_PER_VF_SINGLE_NODE 5 +#define MAX_SQS_PER_VF 11 + u8 sqs_id; + u8 sqs_count; /* Secondary Qset count */ + struct nicvf *snicvf[MAX_SQS_PER_VF]; + u8 rx_queues; + u8 tx_queues; + u8 max_queues; void __iomem *reg_base; bool link_up; u8 duplex; @@ -330,14 +340,19 @@ struct nicvf { #define NIC_MBOX_MSG_RQ_SW_SYNC 0x0F /* Flush inflight pkts to RQ */ #define NIC_MBOX_MSG_BGX_STATS 0x10 /* Get stats from BGX */ #define NIC_MBOX_MSG_BGX_LINK_CHANGE 0x11 /* BGX:LMAC link status */ -#define NIC_MBOX_MSG_CFG_DONE 0x12 /* VF configuration done */ -#define NIC_MBOX_MSG_SHUTDOWN 0x13 /* VF is being shutdown */ +#define NIC_MBOX_MSG_ALLOC_SQS 0x12 /* Allocate secondary Qset */ +#define NIC_MBOX_MSG_NICVF_PTR 0x13 /* Send nicvf ptr to PF */ +#define NIC_MBOX_MSG_PNICVF_PTR 0x14 /* Get primary qset nicvf ptr */ +#define NIC_MBOX_MSG_SNICVF_PTR 0x15 /* Send sqet nicvf ptr to PVF */ +#define NIC_MBOX_MSG_CFG_DONE 0xF0 /* VF configuration done */ +#define NIC_MBOX_MSG_SHUTDOWN 0xF1 /* VF is being shutdown */ struct nic_cfg_msg { u8 msg; u8 vf_id; - u8 tns_mode; u8 node_id; + u8 tns_mode:1; + u8 sqs_mode:1; u8 mac_addr[ETH_ALEN]; }; @@ -345,6 +360,7 @@ struct nic_cfg_msg { struct qs_cfg_msg { u8 msg; u8 num; + u8 sqs_count; u64 cfg; }; @@ -361,6 +377,7 @@ struct sq_cfg_msg { u8 msg; u8 qs_num; u8 sq_num; + bool sqs_mode; u64 cfg; }; @@ -420,6 +437,21 @@ struct bgx_link_status { u32 speed; }; +/* Get Extra Qset IDs */ +struct sqs_alloc { + u8 msg; + u8 vf_id; + u8 qs_count; +}; + +struct nicvf_ptr { + u8 msg; + u8 vf_id; + bool sqs_mode; + u8 sqs_id; + u64 nicvf; +}; + /* 128 bit shared memory between PF and each VF */ union nic_mbx { struct { u8 msg; } msg; @@ -434,6 +466,8 @@ union nic_mbx { struct rss_cfg_msg rss_cfg; struct bgx_stats_msg bgx_stats; struct bgx_link_status link_status; + struct sqs_alloc sqs_alloc; + struct nicvf_ptr nicvf; }; #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 7dfec4afe3f9..dac80943a782 100644 --- a/drivers/net/ethernet/cavium/thunder/nic_main.c +++ b/drivers/net/ethernet/cavium/thunder/nic_main.c @@ -28,6 +28,11 @@ struct nicpf { u8 num_vf_en; /* No of VF enabled */ bool vf_enabled[MAX_NUM_VFS_SUPPORTED]; void __iomem *reg_base; /* Register start address */ + u8 num_sqs_en; /* Secondary qsets enabled */ + u64 nicvf[MAX_NUM_VFS_SUPPORTED]; + u8 vf_sqs[MAX_NUM_VFS_SUPPORTED][MAX_SQS_PER_VF]; + u8 pqs_vf[MAX_NUM_VFS_SUPPORTED]; + bool sqs_used[MAX_NUM_VFS_SUPPORTED]; struct pkind_cfg pkind; #define NIC_SET_VF_LMAC_MAP(bgx, lmac) (((bgx & 0xF) << 4) | (lmac & 0xF)) #define NIC_GET_BGX_FROM_VF_LMAC_MAP(map) ((map >> 4) & 0xF) @@ -139,13 +144,15 @@ static void nic_mbx_send_ready(struct nicpf *nic, int vf) mbx.nic_cfg.tns_mode = NIC_TNS_BYPASS_MODE; - bgx_idx = 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]); - - mac = bgx_get_lmac_mac(nic->node, bgx_idx, lmac); - if (mac) - ether_addr_copy((u8 *)&mbx.nic_cfg.mac_addr, mac); + if (vf < MAX_LMAC) { + bgx_idx = 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]); + mac = bgx_get_lmac_mac(nic->node, bgx_idx, lmac); + if (mac) + ether_addr_copy((u8 *)&mbx.nic_cfg.mac_addr, mac); + } + mbx.nic_cfg.sqs_mode = (vf >= nic->num_vf_en) ? true : false; mbx.nic_cfg.node_id = nic->node; nic_send_msg_to_vf(nic, vf, &mbx); } @@ -433,6 +440,12 @@ static void nic_config_rss(struct nicpf *nic, struct rss_cfg_msg *cfg) qset = cfg->vf_id; for (; rssi < (rssi_base + cfg->tbl_len); rssi++) { + u8 svf = cfg->ind_tbl[idx] >> 3; + + if (svf) + qset = nic->vf_sqs[cfg->vf_id][svf - 1]; + else + qset = cfg->vf_id; nic_reg_write(nic, NIC_PF_RSSI_0_4097_RQ | (rssi << 3), (qset << 3) | (cfg->ind_tbl[idx] & 0x7)); idx++; @@ -456,19 +469,31 @@ static void nic_config_rss(struct nicpf *nic, struct rss_cfg_msg *cfg) * VNIC6-SQ0 -> TL4(528) -> TL3[132] -> TL2[33] -> TL1[1] -> BGX1 * VNIC7-SQ0 -> TL4(536) -> TL3[134] -> TL2[33] -> TL1[1] -> BGX1 */ -static void nic_tx_channel_cfg(struct nicpf *nic, u8 vnic, u8 sq_idx) +static void nic_tx_channel_cfg(struct nicpf *nic, u8 vnic, + struct sq_cfg_msg *sq) { u32 bgx, lmac, chan; u32 tl2, tl3, tl4; u32 rr_quantum; + u8 sq_idx = sq->sq_num; + u8 pqs_vnic; + + if (sq->sqs_mode) + pqs_vnic = nic->pqs_vf[vnic]; + else + pqs_vnic = vnic; + + bgx = NIC_GET_BGX_FROM_VF_LMAC_MAP(nic->vf_lmac_map[pqs_vnic]); + lmac = NIC_GET_LMAC_FROM_VF_LMAC_MAP(nic->vf_lmac_map[pqs_vnic]); - bgx = NIC_GET_BGX_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vnic]); - lmac = NIC_GET_LMAC_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vnic]); /* 24 bytes for FCS, IPG and preamble */ rr_quantum = ((NIC_HW_MAX_FRS + 24) / 4); tl4 = (lmac * NIC_TL4_PER_LMAC) + (bgx * NIC_TL4_PER_BGX); tl4 += sq_idx; + if (sq->sqs_mode) + tl4 += vnic * 8; + tl3 = tl4 / (NIC_MAX_TL4 / NIC_MAX_TL3); nic_reg_write(nic, NIC_PF_QSET_0_127_SQ_0_7_CFG2 | ((u64)vnic << NIC_QS_ID_SHIFT) | @@ -489,6 +514,71 @@ static void nic_tx_channel_cfg(struct nicpf *nic, u8 vnic, u8 sq_idx) nic_reg_write(nic, NIC_PF_TL2_0_63_PRI | (tl2 << 3), 0x00); } +/* Send primary nicvf pointer to secondary QS's VF */ +static void nic_send_pnicvf(struct nicpf *nic, int sqs) +{ + union nic_mbx mbx = {}; + + mbx.nicvf.msg = NIC_MBOX_MSG_PNICVF_PTR; + mbx.nicvf.nicvf = nic->nicvf[nic->pqs_vf[sqs]]; + nic_send_msg_to_vf(nic, sqs, &mbx); +} + +/* Send SQS's nicvf pointer to primary QS's VF */ +static void nic_send_snicvf(struct nicpf *nic, struct nicvf_ptr *nicvf) +{ + union nic_mbx mbx = {}; + int sqs_id = nic->vf_sqs[nicvf->vf_id][nicvf->sqs_id]; + + mbx.nicvf.msg = NIC_MBOX_MSG_SNICVF_PTR; + mbx.nicvf.sqs_id = nicvf->sqs_id; + mbx.nicvf.nicvf = nic->nicvf[sqs_id]; + nic_send_msg_to_vf(nic, nicvf->vf_id, &mbx); +} + +/* Find next available Qset that can be assigned as a + * secondary Qset to a VF. + */ +static int nic_nxt_avail_sqs(struct nicpf *nic) +{ + int sqs; + + for (sqs = 0; sqs < nic->num_sqs_en; sqs++) { + if (!nic->sqs_used[sqs]) + nic->sqs_used[sqs] = true; + else + continue; + return sqs + nic->num_vf_en; + } + return -1; +} + +/* Allocate additional Qsets for requested VF */ +static void nic_alloc_sqs(struct nicpf *nic, struct sqs_alloc *sqs) +{ + union nic_mbx mbx = {}; + int idx, alloc_qs = 0; + int sqs_id; + + if (!nic->num_sqs_en) + goto send_mbox; + + for (idx = 0; idx < sqs->qs_count; idx++) { + sqs_id = nic_nxt_avail_sqs(nic); + if (sqs_id < 0) + break; + nic->vf_sqs[sqs->vf_id][idx] = sqs_id; + nic->pqs_vf[sqs_id] = sqs->vf_id; + alloc_qs++; + } + +send_mbox: + mbx.sqs_alloc.msg = NIC_MBOX_MSG_ALLOC_SQS; + mbx.sqs_alloc.vf_id = sqs->vf_id; + mbx.sqs_alloc.qs_count = alloc_qs; + nic_send_msg_to_vf(nic, sqs->vf_id, &mbx); +} + /* Interrupt handler to handle mailbox messages from VFs */ static void nic_handle_mbx_intr(struct nicpf *nic, int vf) { @@ -496,6 +586,7 @@ static void nic_handle_mbx_intr(struct nicpf *nic, int vf) u64 *mbx_data; u64 mbx_addr; u64 reg_addr; + u64 cfg; int bgx, lmac; int i; int ret = 0; @@ -516,15 +607,24 @@ static void nic_handle_mbx_intr(struct nicpf *nic, int vf) switch (mbx.msg.msg) { case NIC_MBOX_MSG_READY: nic_mbx_send_ready(nic, vf); - nic->link[vf] = 0; - nic->duplex[vf] = 0; - nic->speed[vf] = 0; + if (vf < MAX_LMAC) { + nic->link[vf] = 0; + nic->duplex[vf] = 0; + nic->speed[vf] = 0; + } ret = 1; break; case NIC_MBOX_MSG_QS_CFG: reg_addr = NIC_PF_QSET_0_127_CFG | (mbx.qs.num << NIC_QS_ID_SHIFT); - nic_reg_write(nic, reg_addr, mbx.qs.cfg); + cfg = mbx.qs.cfg; + /* Check if its a secondary Qset */ + if (vf >= nic->num_vf_en) { + cfg = cfg & (~0x7FULL); + /* Assign this Qset to primary Qset's VF */ + cfg |= nic->pqs_vf[vf]; + } + nic_reg_write(nic, reg_addr, cfg); break; case NIC_MBOX_MSG_RQ_CFG: reg_addr = NIC_PF_QSET_0_127_RQ_0_7_CFG | @@ -552,9 +652,11 @@ static void nic_handle_mbx_intr(struct nicpf *nic, int vf) (mbx.sq.qs_num << NIC_QS_ID_SHIFT) | (mbx.sq.sq_num << NIC_Q_NUM_SHIFT); nic_reg_write(nic, reg_addr, mbx.sq.cfg); - nic_tx_channel_cfg(nic, mbx.qs.num, mbx.sq.sq_num); + nic_tx_channel_cfg(nic, mbx.qs.num, &mbx.sq); break; case NIC_MBOX_MSG_SET_MAC: + if (vf >= nic->num_vf_en) + break; lmac = mbx.mac.vf_id; bgx = NIC_GET_BGX_FROM_VF_LMAC_MAP(nic->vf_lmac_map[lmac]); lmac = NIC_GET_LMAC_FROM_VF_LMAC_MAP(nic->vf_lmac_map[lmac]); @@ -581,7 +683,22 @@ static void nic_handle_mbx_intr(struct nicpf *nic, int vf) case NIC_MBOX_MSG_SHUTDOWN: /* First msg in VF teardown sequence */ nic->vf_enabled[vf] = false; + if (vf >= nic->num_vf_en) + nic->sqs_used[vf - nic->num_vf_en] = false; + nic->pqs_vf[vf] = 0; break; + case NIC_MBOX_MSG_ALLOC_SQS: + nic_alloc_sqs(nic, &mbx.sqs_alloc); + goto unlock; + case NIC_MBOX_MSG_NICVF_PTR: + nic->nicvf[vf] = mbx.nicvf.nicvf; + break; + case NIC_MBOX_MSG_PNICVF_PTR: + nic_send_pnicvf(nic, vf); + goto unlock; + case NIC_MBOX_MSG_SNICVF_PTR: + nic_send_snicvf(nic, &mbx.nicvf); + goto unlock; case NIC_MBOX_MSG_BGX_STATS: nic_get_bgx_stats(nic, &mbx.bgx_stats); goto unlock; @@ -610,8 +727,7 @@ static void nic_mbx_intr_handler (struct nicpf *nic, int mbx) if (intr & (1ULL << vf)) { dev_dbg(&nic->pdev->dev, "Intr from VF %d\n", vf + (mbx * vf_per_mbx_reg)); - if ((vf + (mbx * vf_per_mbx_reg)) > nic->num_vf_en) - break; + nic_handle_mbx_intr(nic, vf + (mbx * vf_per_mbx_reg)); nic_clear_mbx_intr(nic, vf, mbx); } @@ -717,9 +833,24 @@ static void nic_unregister_interrupts(struct nicpf *nic) nic_disable_msix(nic); } +static int nic_num_sqs_en(struct nicpf *nic, int vf_en) +{ + int pos, sqs_per_vf = MAX_SQS_PER_VF_SINGLE_NODE; + u16 total_vf; + + /* Check if its a multi-node environment */ + if (nr_node_ids > 1) + sqs_per_vf = MAX_SQS_PER_VF; + + pos = pci_find_ext_capability(nic->pdev, PCI_EXT_CAP_ID_SRIOV); + pci_read_config_word(nic->pdev, (pos + PCI_SRIOV_TOTAL_VF), &total_vf); + return min(total_vf - vf_en, vf_en * sqs_per_vf); +} + static int nic_sriov_init(struct pci_dev *pdev, struct nicpf *nic) { int pos = 0; + int vf_en; int err; u16 total_vf_cnt; @@ -736,16 +867,20 @@ static int nic_sriov_init(struct pci_dev *pdev, struct nicpf *nic) if (!total_vf_cnt) return 0; - err = pci_enable_sriov(pdev, nic->num_vf_en); + vf_en = nic->num_vf_en; + nic->num_sqs_en = nic_num_sqs_en(nic, nic->num_vf_en); + vf_en += nic->num_sqs_en; + + err = pci_enable_sriov(pdev, vf_en); if (err) { dev_err(&pdev->dev, "SRIOV enable failed, num VF is %d\n", - nic->num_vf_en); + vf_en); nic->num_vf_en = 0; return err; } dev_info(&pdev->dev, "SRIOV enabled, number of VF available %d\n", - nic->num_vf_en); + vf_en); nic->flags |= NIC_SRIOV_ENABLED; return 0; diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_ethtool.c b/drivers/net/ethernet/cavium/thunder/nicvf_ethtool.c index 1eec2cd657ff..af54c10945c2 100644 --- a/drivers/net/ethernet/cavium/thunder/nicvf_ethtool.c +++ b/drivers/net/ethernet/cavium/thunder/nicvf_ethtool.c @@ -149,10 +149,33 @@ static void nicvf_set_msglevel(struct net_device *netdev, u32 lvl) nic->msg_enable = lvl; } +static void nicvf_get_qset_strings(struct nicvf *nic, u8 **data, int qset) +{ + int stats, qidx; + int start_qidx = qset * MAX_RCV_QUEUES_PER_QS; + + for (qidx = 0; qidx < nic->qs->rq_cnt; qidx++) { + for (stats = 0; stats < nicvf_n_queue_stats; stats++) { + sprintf(*data, "rxq%d: %s", qidx + start_qidx, + nicvf_queue_stats[stats].name); + *data += ETH_GSTRING_LEN; + } + } + + for (qidx = 0; qidx < nic->qs->sq_cnt; qidx++) { + for (stats = 0; stats < nicvf_n_queue_stats; stats++) { + sprintf(*data, "txq%d: %s", qidx + start_qidx, + nicvf_queue_stats[stats].name); + *data += ETH_GSTRING_LEN; + } + } +} + static void nicvf_get_strings(struct net_device *netdev, u32 sset, u8 *data) { struct nicvf *nic = netdev_priv(netdev); - int stats, qidx; + int stats; + int sqs; if (sset != ETH_SS_STATS) return; @@ -167,20 +190,12 @@ static void nicvf_get_strings(struct net_device *netdev, u32 sset, u8 *data) data += ETH_GSTRING_LEN; } - for (qidx = 0; qidx < nic->qs->rq_cnt; qidx++) { - for (stats = 0; stats < nicvf_n_queue_stats; stats++) { - sprintf(data, "rxq%d: %s", qidx, - nicvf_queue_stats[stats].name); - data += ETH_GSTRING_LEN; - } - } + nicvf_get_qset_strings(nic, &data, 0); - for (qidx = 0; qidx < nic->qs->sq_cnt; qidx++) { - for (stats = 0; stats < nicvf_n_queue_stats; stats++) { - sprintf(data, "txq%d: %s", qidx, - nicvf_queue_stats[stats].name); - data += ETH_GSTRING_LEN; - } + for (sqs = 0; sqs < nic->sqs_count; sqs++) { + if (!nic->snicvf[sqs]) + continue; + nicvf_get_qset_strings(nic->snicvf[sqs], &data, sqs + 1); } for (stats = 0; stats < BGX_RX_STATS_COUNT; stats++) { @@ -197,21 +212,58 @@ static void nicvf_get_strings(struct net_device *netdev, u32 sset, u8 *data) static int nicvf_get_sset_count(struct net_device *netdev, int sset) { struct nicvf *nic = netdev_priv(netdev); + int qstats_count; + int sqs; if (sset != ETH_SS_STATS) return -EINVAL; + qstats_count = nicvf_n_queue_stats * + (nic->qs->rq_cnt + nic->qs->sq_cnt); + for (sqs = 0; sqs < nic->sqs_count; sqs++) { + struct nicvf *snic; + + snic = nic->snicvf[sqs]; + if (!snic) + continue; + qstats_count += nicvf_n_queue_stats * + (snic->qs->rq_cnt + snic->qs->sq_cnt); + } + return nicvf_n_hw_stats + nicvf_n_drv_stats + - (nicvf_n_queue_stats * - (nic->qs->rq_cnt + nic->qs->sq_cnt)) + + qstats_count + BGX_RX_STATS_COUNT + BGX_TX_STATS_COUNT; } +static void nicvf_get_qset_stats(struct nicvf *nic, + struct ethtool_stats *stats, u64 **data) +{ + int stat, qidx; + + if (!nic) + return; + + for (qidx = 0; qidx < nic->qs->rq_cnt; qidx++) { + nicvf_update_rq_stats(nic, qidx); + for (stat = 0; stat < nicvf_n_queue_stats; stat++) + *((*data)++) = ((u64 *)&nic->qs->rq[qidx].stats) + [nicvf_queue_stats[stat].index]; + } + + for (qidx = 0; qidx < nic->qs->sq_cnt; qidx++) { + nicvf_update_sq_stats(nic, qidx); + for (stat = 0; stat < nicvf_n_queue_stats; stat++) + *((*data)++) = ((u64 *)&nic->qs->sq[qidx].stats) + [nicvf_queue_stats[stat].index]; + } +} + static void nicvf_get_ethtool_stats(struct net_device *netdev, struct ethtool_stats *stats, u64 *data) { struct nicvf *nic = netdev_priv(netdev); - int stat, qidx; + int stat; + int sqs; nicvf_update_stats(nic); @@ -225,16 +277,12 @@ static void nicvf_get_ethtool_stats(struct net_device *netdev, *(data++) = ((u64 *)&nic->drv_stats) [nicvf_drv_stats[stat].index]; - for (qidx = 0; qidx < nic->qs->rq_cnt; qidx++) { - for (stat = 0; stat < nicvf_n_queue_stats; stat++) - *(data++) = ((u64 *)&nic->qs->rq[qidx].stats) - [nicvf_queue_stats[stat].index]; - } + nicvf_get_qset_stats(nic, stats, &data); - for (qidx = 0; qidx < nic->qs->sq_cnt; qidx++) { - for (stat = 0; stat < nicvf_n_queue_stats; stat++) - *(data++) = ((u64 *)&nic->qs->sq[qidx].stats) - [nicvf_queue_stats[stat].index]; + for (sqs = 0; sqs < nic->sqs_count; sqs++) { + if (!nic->snicvf[sqs]) + continue; + nicvf_get_qset_stats(nic->snicvf[sqs], stats, &data); } for (stat = 0; stat < BGX_RX_STATS_COUNT; stat++) @@ -393,7 +441,7 @@ static int nicvf_get_rxnfc(struct net_device *dev, switch (info->cmd) { case ETHTOOL_GRXRINGS: - info->data = nic->qs->rq_cnt; + info->data = nic->rx_queues; ret = 0; break; case ETHTOOL_GRXFH: @@ -556,11 +604,11 @@ static void nicvf_get_channels(struct net_device *dev, memset(channel, 0, sizeof(*channel)); - channel->max_rx = MAX_RCV_QUEUES_PER_QS; - channel->max_tx = MAX_SND_QUEUES_PER_QS; + channel->max_rx = nic->max_queues; + channel->max_tx = nic->max_queues; - channel->rx_count = nic->qs->rq_cnt; - channel->tx_count = nic->qs->sq_cnt; + channel->rx_count = nic->rx_queues; + channel->tx_count = nic->tx_queues; } /* Set no of Tx, Rx queues to be used */ @@ -570,22 +618,34 @@ static int nicvf_set_channels(struct net_device *dev, struct nicvf *nic = netdev_priv(dev); int err = 0; bool if_up = netif_running(dev); + int cqcount; if (!channel->rx_count || !channel->tx_count) return -EINVAL; - if (channel->rx_count > MAX_RCV_QUEUES_PER_QS) + if (channel->rx_count > nic->max_queues) return -EINVAL; - if (channel->tx_count > MAX_SND_QUEUES_PER_QS) + if (channel->tx_count > nic->max_queues) return -EINVAL; if (if_up) nicvf_stop(dev); - nic->qs->rq_cnt = channel->rx_count; - nic->qs->sq_cnt = channel->tx_count; + cqcount = max(channel->rx_count, channel->tx_count); + + if (cqcount > MAX_CMP_QUEUES_PER_QS) { + nic->sqs_count = roundup(cqcount, MAX_CMP_QUEUES_PER_QS); + nic->sqs_count = (nic->sqs_count / MAX_CMP_QUEUES_PER_QS) - 1; + } else { + nic->sqs_count = 0; + } + + nic->qs->rq_cnt = min_t(u32, channel->rx_count, MAX_RCV_QUEUES_PER_QS); + nic->qs->sq_cnt = min_t(u32, channel->tx_count, MAX_SND_QUEUES_PER_QS); nic->qs->cq_cnt = max(nic->qs->rq_cnt, nic->qs->sq_cnt); - err = nicvf_set_real_num_queues(dev, nic->qs->sq_cnt, nic->qs->rq_cnt); + nic->rx_queues = channel->rx_count; + nic->tx_queues = channel->tx_count; + err = nicvf_set_real_num_queues(dev, nic->tx_queues, nic->rx_queues); if (err) return err; @@ -593,7 +653,7 @@ static int nicvf_set_channels(struct net_device *dev, nicvf_open(dev); netdev_info(dev, "Setting num Tx rings to %d, Rx rings to %d success\n", - nic->qs->sq_cnt, nic->qs->rq_cnt); + nic->tx_queues, nic->rx_queues); return err; } diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_main.c b/drivers/net/ethernet/cavium/thunder/nicvf_main.c index 85213f38ceb0..68b2dce9229d 100644 --- a/drivers/net/ethernet/cavium/thunder/nicvf_main.c +++ b/drivers/net/ethernet/cavium/thunder/nicvf_main.c @@ -51,6 +51,14 @@ module_param(cpi_alg, int, S_IRUGO); MODULE_PARM_DESC(cpi_alg, "PFC algorithm (0=none, 1=VLAN, 2=VLAN16, 3=IP Diffserv)"); +static inline u8 nicvf_netdev_qidx(struct nicvf *nic, u8 qidx) +{ + if (nic->sqs_mode) + return qidx + ((nic->sqs_id + 1) * MAX_CMP_QUEUES_PER_QS); + else + return qidx; +} + static inline void nicvf_set_rx_frame_cnt(struct nicvf *nic, struct sk_buff *skb) { @@ -193,6 +201,7 @@ static void nicvf_handle_mbx_intr(struct nicvf *nic) if (!nic->set_mac_pending) ether_addr_copy(nic->netdev->dev_addr, mbx.nic_cfg.mac_addr); + nic->sqs_mode = mbx.nic_cfg.sqs_mode; nic->link_up = false; nic->duplex = 0; nic->speed = 0; @@ -230,6 +239,26 @@ static void nicvf_handle_mbx_intr(struct nicvf *nic) netif_tx_stop_all_queues(nic->netdev); } break; + case NIC_MBOX_MSG_ALLOC_SQS: + nic->sqs_count = mbx.sqs_alloc.qs_count; + nic->pf_acked = true; + break; + case NIC_MBOX_MSG_SNICVF_PTR: + /* Primary VF: make note of secondary VF's pointer + * to be used while packet transmission. + */ + nic->snicvf[mbx.nicvf.sqs_id] = + (struct nicvf *)mbx.nicvf.nicvf; + nic->pf_acked = true; + break; + case NIC_MBOX_MSG_PNICVF_PTR: + /* Secondary VF/Qset: make note of primary VF's pointer + * to be used while packet reception, to handover packet + * to primary VF's netdev. + */ + nic->pnicvf = (struct nicvf *)mbx.nicvf.nicvf; + nic->pf_acked = true; + break; default: netdev_err(nic->netdev, "Invalid message from PF, msg 0x%x\n", mbx.msg.msg); @@ -338,11 +367,100 @@ static int nicvf_rss_init(struct nicvf *nic) for (idx = 0; idx < rss->rss_size; idx++) rss->ind_tbl[idx] = ethtool_rxfh_indir_default(idx, - nic->qs->rq_cnt); + nic->rx_queues); nicvf_config_rss(nic); return 1; } +/* Request PF to allocate additional Qsets */ +static void nicvf_request_sqs(struct nicvf *nic) +{ + union nic_mbx mbx = {}; + int sqs; + int sqs_count = nic->sqs_count; + int rx_queues = 0, tx_queues = 0; + + /* Only primary VF should request */ + if (nic->sqs_mode || !nic->sqs_count) + return; + + mbx.sqs_alloc.msg = NIC_MBOX_MSG_ALLOC_SQS; + mbx.sqs_alloc.vf_id = nic->vf_id; + mbx.sqs_alloc.qs_count = nic->sqs_count; + if (nicvf_send_msg_to_pf(nic, &mbx)) { + /* No response from PF */ + nic->sqs_count = 0; + return; + } + + /* Return if no Secondary Qsets available */ + if (!nic->sqs_count) + return; + + if (nic->rx_queues > MAX_RCV_QUEUES_PER_QS) + rx_queues = nic->rx_queues - MAX_RCV_QUEUES_PER_QS; + if (nic->tx_queues > MAX_SND_QUEUES_PER_QS) + tx_queues = nic->tx_queues - MAX_SND_QUEUES_PER_QS; + + /* Set no of Rx/Tx queues in each of the SQsets */ + for (sqs = 0; sqs < nic->sqs_count; sqs++) { + mbx.nicvf.msg = NIC_MBOX_MSG_SNICVF_PTR; + mbx.nicvf.vf_id = nic->vf_id; + mbx.nicvf.sqs_id = sqs; + nicvf_send_msg_to_pf(nic, &mbx); + + nic->snicvf[sqs]->sqs_id = sqs; + if (rx_queues > MAX_RCV_QUEUES_PER_QS) { + nic->snicvf[sqs]->qs->rq_cnt = MAX_RCV_QUEUES_PER_QS; + rx_queues -= MAX_RCV_QUEUES_PER_QS; + } else { + nic->snicvf[sqs]->qs->rq_cnt = rx_queues; + rx_queues = 0; + } + + if (tx_queues > MAX_SND_QUEUES_PER_QS) { + nic->snicvf[sqs]->qs->sq_cnt = MAX_SND_QUEUES_PER_QS; + tx_queues -= MAX_SND_QUEUES_PER_QS; + } else { + nic->snicvf[sqs]->qs->sq_cnt = tx_queues; + tx_queues = 0; + } + + nic->snicvf[sqs]->qs->cq_cnt = + max(nic->snicvf[sqs]->qs->rq_cnt, nic->snicvf[sqs]->qs->sq_cnt); + + /* Initialize secondary Qset's queues and its interrupts */ + nicvf_open(nic->snicvf[sqs]->netdev); + } + + /* Update stack with actual Rx/Tx queue count allocated */ + if (sqs_count != nic->sqs_count) + nicvf_set_real_num_queues(nic->netdev, + nic->tx_queues, nic->rx_queues); +} + +/* Send this Qset's nicvf pointer to PF. + * PF inturn sends primary VF's nicvf struct to secondary Qsets/VFs + * so that packets received by these Qsets can use primary VF's netdev + */ +static void nicvf_send_vf_struct(struct nicvf *nic) +{ + union nic_mbx mbx = {}; + + mbx.nicvf.msg = NIC_MBOX_MSG_NICVF_PTR; + mbx.nicvf.sqs_mode = nic->sqs_mode; + mbx.nicvf.nicvf = (u64)nic; + nicvf_send_msg_to_pf(nic, &mbx); +} + +static void nicvf_get_primary_vf_struct(struct nicvf *nic) +{ + union nic_mbx mbx = {}; + + mbx.nicvf.msg = NIC_MBOX_MSG_PNICVF_PTR; + nicvf_send_msg_to_pf(nic, &mbx); +} + int nicvf_set_real_num_queues(struct net_device *netdev, int tx_queues, int rx_queues) { @@ -453,6 +571,15 @@ static void nicvf_rcv_pkt_handler(struct net_device *netdev, struct sk_buff *skb; struct nicvf *nic = netdev_priv(netdev); int err = 0; + int rq_idx; + + rq_idx = nicvf_netdev_qidx(nic, cqe_rx->rq_idx); + + if (nic->sqs_mode) { + /* Use primary VF's 'nicvf' struct */ + nic = nic->pnicvf; + netdev = nic->netdev; + } /* Check for errors */ err = nicvf_check_cqe_rx_errs(nic, cq, cqe_rx); @@ -482,7 +609,7 @@ static void nicvf_rcv_pkt_handler(struct net_device *netdev, nicvf_set_rxhash(netdev, cqe_rx, skb); - skb_record_rx_queue(skb, cqe_rx->rq_idx); + skb_record_rx_queue(skb, rq_idx); if (netdev->hw_features & NETIF_F_RXCSUM) { /* HW by default verifies TCP/UDP/SCTP checksums */ skb->ip_summed = CHECKSUM_UNNECESSARY; @@ -578,8 +705,11 @@ static int nicvf_cq_intr_handler(struct net_device *netdev, u8 cq_idx, done: /* Wakeup TXQ if its stopped earlier due to SQ full */ if (tx_done) { - txq = netdev_get_tx_queue(netdev, cq_idx); - if (netif_tx_queue_stopped(txq)) { + netdev = nic->pnicvf->netdev; + txq = netdev_get_tx_queue(netdev, + nicvf_netdev_qidx(nic, cq_idx)); + nic = nic->pnicvf; + if (netif_tx_queue_stopped(txq) && netif_carrier_ok(netdev)) { netif_tx_start_queue(txq); nic->drv_stats.txq_wake++; if (netif_msg_tx_err(nic)) @@ -893,7 +1023,6 @@ static netdev_tx_t nicvf_xmit(struct sk_buff *skb, struct net_device *netdev) netdev_warn(netdev, "%s: Transmit ring full, stopping SQ%d\n", netdev->name, qid); - return NETDEV_TX_BUSY; } @@ -926,6 +1055,17 @@ int nicvf_stop(struct net_device *netdev) nicvf_send_msg_to_pf(nic, &mbx); netif_carrier_off(netdev); + netif_tx_stop_all_queues(nic->netdev); + + /* Teardown secondary qsets first */ + if (!nic->sqs_mode) { + for (qidx = 0; qidx < nic->sqs_count; qidx++) { + if (!nic->snicvf[qidx]) + continue; + nicvf_stop(nic->snicvf[qidx]->netdev); + nic->snicvf[qidx] = NULL; + } + } /* Disable RBDR & QS error interrupts */ for (qidx = 0; qidx < qs->rbdr_cnt; qidx++) { @@ -973,6 +1113,10 @@ int nicvf_stop(struct net_device *netdev) nicvf_free_cq_poll(nic); + /* Clear multiqset info */ + nic->pnicvf = nic; + nic->sqs_count = 0; + return 0; } @@ -1028,10 +1172,16 @@ int nicvf_open(struct net_device *netdev) /* Configure CPI alorithm */ nic->cpi_alg = cpi_alg; - nicvf_config_cpi(nic); + if (!nic->sqs_mode) + nicvf_config_cpi(nic); + + nicvf_request_sqs(nic); + if (nic->sqs_mode) + nicvf_get_primary_vf_struct(nic); /* Configure receive side scaling */ - nicvf_rss_init(nic); + if (!nic->sqs_mode) + nicvf_rss_init(nic); err = nicvf_register_interrupts(nic); if (err) @@ -1282,8 +1432,7 @@ static int nicvf_probe(struct pci_dev *pdev, const struct pci_device_id *ent) struct device *dev = &pdev->dev; struct net_device *netdev; struct nicvf *nic; - struct queue_set *qs; - int err; + int err, qcount; err = pci_enable_device(pdev); if (err) { @@ -1309,9 +1458,17 @@ static int nicvf_probe(struct pci_dev *pdev, const struct pci_device_id *ent) goto err_release_regions; } - netdev = alloc_etherdev_mqs(sizeof(struct nicvf), - MAX_RCV_QUEUES_PER_QS, - MAX_SND_QUEUES_PER_QS); + qcount = MAX_CMP_QUEUES_PER_QS; + + /* Restrict multiqset support only for host bound VFs */ + if (pdev->is_virtfn) { + /* Set max number of queues per VF */ + qcount = roundup(num_online_cpus(), MAX_CMP_QUEUES_PER_QS); + qcount = min(qcount, + (MAX_SQS_PER_VF + 1) * MAX_CMP_QUEUES_PER_QS); + } + + netdev = alloc_etherdev_mqs(sizeof(struct nicvf), qcount, qcount); if (!netdev) { err = -ENOMEM; goto err_release_regions; @@ -1324,6 +1481,8 @@ static int nicvf_probe(struct pci_dev *pdev, const struct pci_device_id *ent) nic = netdev_priv(netdev); nic->netdev = netdev; nic->pdev = pdev; + nic->pnicvf = nic; + nic->max_queues = qcount; /* MAP VF's configuration registers */ nic->reg_base = pcim_iomap(pdev, PCI_CFG_REG_BAR_NUM, 0); @@ -1337,20 +1496,26 @@ static int nicvf_probe(struct pci_dev *pdev, const struct pci_device_id *ent) if (err) goto err_free_netdev; - qs = nic->qs; - - err = nicvf_set_real_num_queues(netdev, qs->sq_cnt, qs->rq_cnt); - if (err) - goto err_free_netdev; - /* Check if PF is alive and get MAC address for this VF */ err = nicvf_register_misc_interrupt(nic); if (err) goto err_free_netdev; + nicvf_send_vf_struct(nic); + + /* Check if this VF is in QS only mode */ + if (nic->sqs_mode) + return 0; + + err = nicvf_set_real_num_queues(netdev, nic->tx_queues, nic->rx_queues); + if (err) + goto err_unregister_interrupts; + netdev->hw_features = (NETIF_F_RXCSUM | NETIF_F_IP_CSUM | NETIF_F_SG | NETIF_F_TSO | NETIF_F_GRO | - NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_RXHASH); + NETIF_F_HW_VLAN_CTAG_RX); + + netdev->hw_features |= NETIF_F_RXHASH; netdev->features |= netdev->hw_features; @@ -1389,8 +1554,13 @@ static void nicvf_remove(struct pci_dev *pdev) { struct net_device *netdev = pci_get_drvdata(pdev); struct nicvf *nic = netdev_priv(netdev); + struct net_device *pnetdev = nic->pnicvf->netdev; - unregister_netdev(netdev); + /* Check if this Qset is assigned to different VF. + * If yes, clean primary and all secondary Qsets. + */ + if (pnetdev && (pnetdev->reg_state == NETREG_REGISTERED)) + unregister_netdev(pnetdev); nicvf_unregister_interrupts(nic); pci_set_drvdata(pdev, NULL); free_netdev(netdev); diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_queues.c b/drivers/net/ethernet/cavium/thunder/nicvf_queues.c index b294d67d48e4..e404ea837727 100644 --- a/drivers/net/ethernet/cavium/thunder/nicvf_queues.c +++ b/drivers/net/ethernet/cavium/thunder/nicvf_queues.c @@ -621,6 +621,7 @@ static void nicvf_snd_queue_config(struct nicvf *nic, struct queue_set *qs, mbx.sq.msg = NIC_MBOX_MSG_SQ_CFG; mbx.sq.qs_num = qs->vnic_id; mbx.sq.sq_num = qidx; + mbx.sq.sqs_mode = nic->sqs_mode; mbx.sq.cfg = (sq->cq_qs << 3) | sq->cq_idx; nicvf_send_msg_to_pf(nic, &mbx); @@ -702,6 +703,7 @@ void nicvf_qset_config(struct nicvf *nic, bool enable) /* Send a mailbox msg to PF to config Qset */ mbx.qs.msg = NIC_MBOX_MSG_QS_CFG; mbx.qs.num = qs->vnic_id; + mbx.qs.sqs_count = nic->sqs_count; mbx.qs.cfg = 0; qs_cfg = (struct qs_cfg *)&mbx.qs.cfg; @@ -782,6 +784,10 @@ int nicvf_set_qset_resources(struct nicvf *nic) qs->rbdr_len = RCV_BUF_COUNT; qs->sq_len = SND_QUEUE_LEN; qs->cq_len = CMP_QUEUE_LEN; + + nic->rx_queues = qs->rq_cnt; + nic->tx_queues = qs->sq_cnt; + return 0; } @@ -1025,7 +1031,7 @@ static inline void nicvf_sq_add_gather_subdesc(struct snd_queue *sq, int qentry, * them to SQ for transfer */ static int nicvf_sq_append_tso(struct nicvf *nic, struct snd_queue *sq, - int qentry, struct sk_buff *skb) + int sq_num, int qentry, struct sk_buff *skb) { struct tso_t tso; int seg_subdescs = 0, desc_cnt = 0; @@ -1085,7 +1091,7 @@ static int nicvf_sq_append_tso(struct nicvf *nic, struct snd_queue *sq, /* Inform HW to xmit all TSO segments */ nicvf_queue_reg_write(nic, NIC_QSET_SQ_0_7_DOOR, - skb_get_queue_mapping(skb), desc_cnt); + sq_num, desc_cnt); nic->drv_stats.tx_tso++; return 1; } @@ -1096,10 +1102,24 @@ int nicvf_sq_append_skb(struct nicvf *nic, struct sk_buff *skb) int i, size; int subdesc_cnt; int sq_num, qentry; - struct queue_set *qs = nic->qs; + struct queue_set *qs; struct snd_queue *sq; sq_num = skb_get_queue_mapping(skb); + if (sq_num >= MAX_SND_QUEUES_PER_QS) { + /* Get secondary Qset's SQ structure */ + i = sq_num / MAX_SND_QUEUES_PER_QS; + if (!nic->snicvf[i - 1]) { + netdev_warn(nic->netdev, + "Secondary Qset#%d's ptr not initialized\n", + i - 1); + return 1; + } + nic = (struct nicvf *)nic->snicvf[i - 1]; + sq_num = sq_num % MAX_SND_QUEUES_PER_QS; + } + + qs = nic->qs; sq = &qs->sq[sq_num]; subdesc_cnt = nicvf_sq_subdesc_required(nic, skb); @@ -1110,7 +1130,7 @@ int nicvf_sq_append_skb(struct nicvf *nic, struct sk_buff *skb) /* Check if its a TSO packet */ if (skb_shinfo(skb)->gso_size) - return nicvf_sq_append_tso(nic, sq, qentry, skb); + return nicvf_sq_append_tso(nic, sq, sq_num, qentry, skb); /* Add SQ header subdesc */ nicvf_sq_add_hdr_subdesc(sq, qentry, subdesc_cnt - 1, skb, skb->len); @@ -1146,6 +1166,8 @@ int nicvf_sq_append_skb(struct nicvf *nic, struct sk_buff *skb) return 1; append_fail: + /* Use original PCI dev for debug log */ + nic = nic->pnicvf; netdev_dbg(nic->netdev, "Not enough SQ descriptors to xmit pkt\n"); return 0; }