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Date: Mon, 13 Dec 2021 19:30:49 +0000
From: Radha Chintakuntla <radhac@...vell.com>
To: Radha Chintakuntla <radhac@...vell.com>,
"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
"davem@...emloft.net" <davem@...emloft.net>,
Sunil Kovvuri Goutham <sgoutham@...vell.com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v2] octeontx2-nicvf: Add netdev interface support for SDP
VF devices
> -----Original Message-----
> From: Radha Mohan Chintakuntla <radhac@...vell.com>
> Sent: Monday, December 6, 2021 10:26 AM
> To: netdev@...r.kernel.org; davem@...emloft.net; Sunil Kovvuri Goutham
> <sgoutham@...vell.com>; linux-kernel@...r.kernel.org
> Cc: Radha Chintakuntla <radhac@...vell.com>
> Subject: [PATCH v2] octeontx2-nicvf: Add netdev interface support for SDP
> VF devices
>
> This patch adds netdev interface for SDP VFs. This interface can be used to
> communicate with a host over PCIe when OcteonTx is in PCIe Endpoint
> mode.
>
> Signed-off-by: Radha Mohan Chintakuntla <radhac@...vell.com>
> ---
> Changes from v1:
> - fixed formatting issues happened due to email client
>
> .../ethernet/marvell/octeontx2/nic/cn10k.c | 4 +--
> .../ethernet/marvell/octeontx2/nic/cn10k.h | 2 +-
> .../marvell/octeontx2/nic/otx2_common.c | 32 +++++++++++++------
> .../marvell/octeontx2/nic/otx2_common.h | 14 ++++++--
> .../ethernet/marvell/octeontx2/nic/otx2_reg.h | 1 +
> .../ethernet/marvell/octeontx2/nic/otx2_vf.c | 16 ++++++++--
> 6 files changed, 51 insertions(+), 18 deletions(-)
>
> diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/cn10k.c
> b/drivers/net/ethernet/marvell/octeontx2/nic/cn10k.c
> index fd4f083c699e..2262d33a7f23 100644
> --- a/drivers/net/ethernet/marvell/octeontx2/nic/cn10k.c
> +++ b/drivers/net/ethernet/marvell/octeontx2/nic/cn10k.c
> @@ -72,7 +72,7 @@ int cn10k_lmtst_init(struct otx2_nic *pfvf) }
> EXPORT_SYMBOL(cn10k_lmtst_init);
>
> -int cn10k_sq_aq_init(void *dev, u16 qidx, u16 sqb_aura)
> +int cn10k_sq_aq_init(void *dev, u16 qidx, u8 chan_offset, u16 sqb_aura)
> {
> struct nix_cn10k_aq_enq_req *aq;
> struct otx2_nic *pfvf = dev;
> @@ -89,7 +89,7 @@ int cn10k_sq_aq_init(void *dev, u16 qidx, u16 sqb_aura)
> /* Only one SMQ is allocated, map all SQ's to that SMQ */
> aq->sq.smq = pfvf->hw.txschq_list[NIX_TXSCH_LVL_SMQ][0];
> aq->sq.smq_rr_weight = mtu_to_dwrr_weight(pfvf, pfvf-
> >tx_max_pktlen);
> - aq->sq.default_chan = pfvf->hw.tx_chan_base;
> + aq->sq.default_chan = pfvf->hw.tx_chan_base + chan_offset;
> aq->sq.sqe_stype = NIX_STYPE_STF; /* Cache SQB */
> aq->sq.sqb_aura = sqb_aura;
> aq->sq.sq_int_ena = NIX_SQINT_BITS;
> diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/cn10k.h
> b/drivers/net/ethernet/marvell/octeontx2/nic/cn10k.h
> index 8ae96815865e..28b3b3275fe6 100644
> --- a/drivers/net/ethernet/marvell/octeontx2/nic/cn10k.h
> +++ b/drivers/net/ethernet/marvell/octeontx2/nic/cn10k.h
> @@ -26,7 +26,7 @@ static inline int mtu_to_dwrr_weight(struct otx2_nic
> *pfvf, int mtu)
>
> void cn10k_refill_pool_ptrs(void *dev, struct otx2_cq_queue *cq); void
> cn10k_sqe_flush(void *dev, struct otx2_snd_queue *sq, int size, int qidx); -
> int cn10k_sq_aq_init(void *dev, u16 qidx, u16 sqb_aura);
> +int cn10k_sq_aq_init(void *dev, u16 qidx, u8 chan_offset, u16
> +sqb_aura);
> int cn10k_lmtst_init(struct otx2_nic *pfvf); int
> cn10k_free_all_ipolicers(struct otx2_nic *pfvf); int
> cn10k_alloc_matchall_ipolicer(struct otx2_nic *pfvf); diff --git
> a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c
> b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c
> index 66da31f30d3e..e46c24171597 100644
> --- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c
> +++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c
> @@ -233,6 +233,9 @@ int otx2_hw_set_mtu(struct otx2_nic *pfvf, int mtu)
>
> req->maxlen = pfvf->netdev->mtu + OTX2_ETH_HLEN +
> OTX2_HW_TIMESTAMP_LEN;
>
> + if (is_otx2_sdpvf(pfvf->pdev))
> + req->sdp_link = true;
> +
> err = otx2_sync_mbox_msg(&pfvf->mbox);
> mutex_unlock(&pfvf->mbox.lock);
> return err;
> @@ -243,7 +246,7 @@ int otx2_config_pause_frm(struct otx2_nic *pfvf)
> struct cgx_pause_frm_cfg *req;
> int err;
>
> - if (is_otx2_lbkvf(pfvf->pdev))
> + if (is_otx2_lbkvf(pfvf->pdev) || is_otx2_sdpvf(pfvf->pdev))
> return 0;
>
> mutex_lock(&pfvf->mbox.lock);
> @@ -622,6 +625,11 @@ int otx2_txschq_config(struct otx2_nic *pfvf, int lvl)
> req->num_regs++;
> req->reg[1] = NIX_AF_TL4X_SCHEDULE(schq);
> req->regval[1] = dwrr_val;
> + if (is_otx2_sdpvf(pfvf->pdev)) {
> + req->num_regs++;
> + req->reg[2] = NIX_AF_TL4X_SDP_LINK_CFG(schq);
> + req->regval[2] = BIT_ULL(12);
> + }
> } else if (lvl == NIX_TXSCH_LVL_TL3) {
> parent = hw->txschq_list[NIX_TXSCH_LVL_TL2][0];
> req->reg[0] = NIX_AF_TL3X_PARENT(schq); @@ -638,11
> +646,12 @@ int otx2_txschq_config(struct otx2_nic *pfvf, int lvl)
> req->reg[1] = NIX_AF_TL2X_SCHEDULE(schq);
> req->regval[1] = TXSCH_TL1_DFLT_RR_PRIO << 24 |
> dwrr_val;
>
> - req->num_regs++;
> - req->reg[2] = NIX_AF_TL3_TL2X_LINKX_CFG(schq, hw-
> >tx_link);
> - /* Enable this queue and backpressure */
> - req->regval[2] = BIT_ULL(13) | BIT_ULL(12);
> -
> + if (!is_otx2_sdpvf(pfvf->pdev)) {
> + req->num_regs++;
> + req->reg[2] = NIX_AF_TL3_TL2X_LINKX_CFG(schq,
> hw->tx_link);
> + /* Enable this queue and backpressure */
> + req->regval[2] = BIT_ULL(13) | BIT_ULL(12);
> + }
> } else if (lvl == NIX_TXSCH_LVL_TL1) {
> /* Default config for TL1.
> * For VF this is always ignored.
> @@ -779,7 +788,7 @@ static int otx2_rq_init(struct otx2_nic *pfvf, u16 qidx,
> u16 lpb_aura)
> return otx2_sync_mbox_msg(&pfvf->mbox); }
>
> -int otx2_sq_aq_init(void *dev, u16 qidx, u16 sqb_aura)
> +int otx2_sq_aq_init(void *dev, u16 qidx, u8 chan_offset, u16 sqb_aura)
> {
> struct otx2_nic *pfvf = dev;
> struct otx2_snd_queue *sq;
> @@ -799,7 +808,7 @@ int otx2_sq_aq_init(void *dev, u16 qidx, u16
> sqb_aura)
> /* Only one SMQ is allocated, map all SQ's to that SMQ */
> aq->sq.smq = pfvf->hw.txschq_list[NIX_TXSCH_LVL_SMQ][0];
> aq->sq.smq_rr_quantum = mtu_to_dwrr_weight(pfvf, pfvf-
> >tx_max_pktlen);
> - aq->sq.default_chan = pfvf->hw.tx_chan_base;
> + aq->sq.default_chan = pfvf->hw.tx_chan_base + chan_offset;
> aq->sq.sqe_stype = NIX_STYPE_STF; /* Cache SQB */
> aq->sq.sqb_aura = sqb_aura;
> aq->sq.sq_int_ena = NIX_SQINT_BITS;
> @@ -822,6 +831,7 @@ static int otx2_sq_init(struct otx2_nic *pfvf, u16 qidx,
> u16 sqb_aura)
> struct otx2_qset *qset = &pfvf->qset;
> struct otx2_snd_queue *sq;
> struct otx2_pool *pool;
> + u8 chan_offset;
> int err;
>
> pool = &pfvf->qset.pool[sqb_aura];
> @@ -864,8 +874,8 @@ static int otx2_sq_init(struct otx2_nic *pfvf, u16 qidx,
> u16 sqb_aura)
> sq->stats.bytes = 0;
> sq->stats.pkts = 0;
>
> - return pfvf->hw_ops->sq_aq_init(pfvf, qidx, sqb_aura);
> -
> + chan_offset = qidx % pfvf->hw.tx_chan_cnt;
> + return pfvf->hw_ops->sq_aq_init(pfvf, qidx, chan_offset,
> sqb_aura);
> }
>
> static int otx2_cq_init(struct otx2_nic *pfvf, u16 qidx) @@ -1590,6 +1600,8
> @@ void mbox_handler_nix_lf_alloc(struct otx2_nic *pfvf,
> pfvf->hw.sqb_size = rsp->sqb_size;
> pfvf->hw.rx_chan_base = rsp->rx_chan_base;
> pfvf->hw.tx_chan_base = rsp->tx_chan_base;
> + pfvf->hw.rx_chan_cnt = rsp->rx_chan_cnt;
> + pfvf->hw.tx_chan_cnt = rsp->tx_chan_cnt;
> pfvf->hw.lso_tsov4_idx = rsp->lso_tsov4_idx;
> pfvf->hw.lso_tsov6_idx = rsp->lso_tsov6_idx;
> pfvf->hw.cgx_links = rsp->cgx_links;
> diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
> b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
> index 61e52812983f..386fd7f95944 100644
> --- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
> +++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
> @@ -28,6 +28,7 @@
> /* PCI device IDs */
> #define PCI_DEVID_OCTEONTX2_RVU_PF 0xA063
> #define PCI_DEVID_OCTEONTX2_RVU_VF 0xA064
> +#define PCI_DEVID_OCTEONTX2_SDP_VF 0xA0F7
> #define PCI_DEVID_OCTEONTX2_RVU_AFVF 0xA0F8
>
> #define PCI_SUBSYS_DEVID_96XX_RVU_PFVF 0xB200
> @@ -191,6 +192,8 @@ struct otx2_hw {
> /* HW settings, coalescing etc */
> u16 rx_chan_base;
> u16 tx_chan_base;
> + u8 rx_chan_cnt;
> + u8 tx_chan_cnt;
> u16 cq_qcount_wait;
> u16 cq_ecount_wait;
> u16 rq_skid;
> @@ -314,7 +317,7 @@ struct otx2_tc_info { };
>
> struct dev_hw_ops {
> - int (*sq_aq_init)(void *dev, u16 qidx, u16 sqb_aura);
> + int (*sq_aq_init)(void *dev, u16 qidx, u8 chan_offset, u16
> sqb_aura);
> void (*sqe_flush)(void *dev, struct otx2_snd_queue *sq,
> int size, int qidx);
> void (*refill_pool_ptrs)(void *dev, struct otx2_cq_queue *cq);
> @@ -403,6 +406,11 @@ static inline bool is_otx2_lbkvf(struct pci_dev *pdev)
> return pdev->device == PCI_DEVID_OCTEONTX2_RVU_AFVF; }
>
> +static inline bool is_otx2_sdpvf(struct pci_dev *pdev) {
> + return pdev->device == PCI_DEVID_OCTEONTX2_SDP_VF; }
> +
> static inline bool is_96xx_A0(struct pci_dev *pdev) {
> return (pdev->revision == 0x00) &&
> @@ -794,8 +802,8 @@ void otx2_ctx_disable(struct mbox *mbox, int type,
> bool npa); int otx2_nix_config_bp(struct otx2_nic *pfvf, bool enable); void
> otx2_cleanup_rx_cqes(struct otx2_nic *pfvf, struct otx2_cq_queue *cq);
> void otx2_cleanup_tx_cqes(struct otx2_nic *pfvf, struct otx2_cq_queue
> *cq); -int otx2_sq_aq_init(void *dev, u16 qidx, u16 sqb_aura); -int
> cn10k_sq_aq_init(void *dev, u16 qidx, u16 sqb_aura);
> +int otx2_sq_aq_init(void *dev, u16 qidx, u8 chan_offset, u16 sqb_aura);
> +int cn10k_sq_aq_init(void *dev, u16 qidx, u8 chan_offset, u16
> +sqb_aura);
> int otx2_alloc_buffer(struct otx2_nic *pfvf, struct otx2_cq_queue *cq,
> dma_addr_t *dma);
>
> diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_reg.h
> b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_reg.h
> index 1b967eaf948b..6ef52051ab09 100644
> --- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_reg.h
> +++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_reg.h
> @@ -140,6 +140,7 @@
>
> /* NIX AF transmit scheduler registers */
> #define NIX_AF_SMQX_CFG(a) (0x700 | (a) << 16)
> +#define NIX_AF_TL4X_SDP_LINK_CFG(a) (0xB10 | (a) << 16)
> #define NIX_AF_TL1X_SCHEDULE(a) (0xC00 | (a) << 16)
> #define NIX_AF_TL1X_CIR(a) (0xC20 | (a) << 16)
> #define NIX_AF_TL1X_TOPOLOGY(a) (0xC80 | (a) << 16)
> diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_vf.c
> b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_vf.c
> index 254bebffe8c1..bc2566cb2ec1 100644
> --- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_vf.c
> +++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_vf.c
> @@ -21,6 +21,7 @@
> static const struct pci_device_id otx2_vf_id_table[] = {
> { PCI_DEVICE(PCI_VENDOR_ID_CAVIUM,
> PCI_DEVID_OCTEONTX2_RVU_AFVF) },
> { PCI_DEVICE(PCI_VENDOR_ID_CAVIUM,
> PCI_DEVID_OCTEONTX2_RVU_VF) },
> + { PCI_DEVICE(PCI_VENDOR_ID_CAVIUM,
> PCI_DEVID_OCTEONTX2_SDP_VF) },
> { }
> };
>
> @@ -361,7 +362,7 @@ static int otx2vf_open(struct net_device *netdev)
>
> /* LBKs do not receive link events so tell everyone we are up here */
> vf = netdev_priv(netdev);
> - if (is_otx2_lbkvf(vf->pdev)) {
> + if (is_otx2_lbkvf(vf->pdev) || is_otx2_sdpvf(vf->pdev)) {
> pr_info("%s NIC Link is UP\n", netdev->name);
> netif_carrier_on(netdev);
> netif_tx_start_all_queues(netdev);
> @@ -681,6 +682,16 @@ static int otx2vf_probe(struct pci_dev *pdev, const
> struct pci_device_id *id)
> snprintf(netdev->name, sizeof(netdev->name), "lbk%d", n);
> }
>
> + /* To distinguish, for SDP VFs set netdev name explicitly */
> + if (is_otx2_sdpvf(vf->pdev)) {
> + int n;
> +
> + n = (vf->pcifunc >> RVU_PFVF_FUNC_SHIFT) &
> RVU_PFVF_FUNC_MASK;
> + /* Need to subtract 1 to get proper VF number */
> + n -= 1;
> + snprintf(netdev->name, sizeof(netdev->name), "sdp%d-
> %d", pdev->bus->number, n);
> + }
> +
> err = register_netdev(netdev);
> if (err) {
> dev_err(dev, "Failed to register netdevice\n"); @@ -691,7
> +702,8 @@ static int otx2vf_probe(struct pci_dev *pdev, const struct
> pci_device_id *id)
> if (err)
> goto err_unreg_netdev;
>
> - otx2vf_set_ethtool_ops(netdev);
> + if (!is_otx2_sdpvf(vf->pdev))
> + otx2vf_set_ethtool_ops(netdev);
>
> err = otx2vf_mcam_flow_init(vf);
> if (err)
> --
> 2.17.1
Hi David,
Could you please accept this ?
- Radha
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