Re: [net-next PATCH 2/9] octeontx2-pf: RVU representor driver

From: Kalesh Anakkur Purayil
Date: Tue Apr 16 2024 - 12:18:33 EST

On Tue, Apr 16, 2024 at 10:37 AM Geetha sowjanya <gakula@xxxxxxxxxxx> wrote:
>
> This patch adds basic driver for the RVU representor.
> Driver on probe does pci specific initialization and does hw
> resources configuration.
> Introduces RVU_ESWITCH kernel config to enable/disable
> this driver. Representor and NIC shares the code but represenotrs
> netdev support subset of NIC functionality. Hence "is_rep_dev"
> api helps to skip the features initialization that are not supported
> by the representors.
>
> Signed-off-by: Geetha sowjanya <gakula@xxxxxxxxxxx>
> ---
> .../net/ethernet/marvell/octeontx2/Kconfig | 8 +
> .../ethernet/marvell/octeontx2/af/Makefile | 3 +-
> .../net/ethernet/marvell/octeontx2/af/mbox.h | 8 +
> .../net/ethernet/marvell/octeontx2/af/rvu.h | 11 +
> .../ethernet/marvell/octeontx2/af/rvu_nix.c | 19 +-
> .../ethernet/marvell/octeontx2/af/rvu_rep.c | 48 ++++
> .../ethernet/marvell/octeontx2/nic/Makefile | 2 +
> .../marvell/octeontx2/nic/otx2_common.h | 12 +-
> .../ethernet/marvell/octeontx2/nic/otx2_pf.c | 17 +-
> .../marvell/octeontx2/nic/otx2_txrx.c | 19 +-
> .../net/ethernet/marvell/octeontx2/nic/rep.c | 221 ++++++++++++++++++
> .../net/ethernet/marvell/octeontx2/nic/rep.h | 32 +++
> 12 files changed, 383 insertions(+), 17 deletions(-)
> create mode 100644 drivers/net/ethernet/marvell/octeontx2/af/rvu_rep.c
> create mode 100644 drivers/net/ethernet/marvell/octeontx2/nic/rep.c
> create mode 100644 drivers/net/ethernet/marvell/octeontx2/nic/rep.h
>
> diff --git a/drivers/net/ethernet/marvell/octeontx2/Kconfig b/drivers/net/ethernet/marvell/octeontx2/Kconfig
> index a32d85d6f599..72f57d6f8a87 100644
> --- a/drivers/net/ethernet/marvell/octeontx2/Kconfig
> +++ b/drivers/net/ethernet/marvell/octeontx2/Kconfig
> @@ -46,3 +46,11 @@ config OCTEONTX2_VF
> depends on OCTEONTX2_PF
> help
> This driver supports Marvell's OcteonTX2 NIC virtual function.
> +
> +config RVU_ESWITCH
> + tristate "Marvell RVU E-Switch support"
> + depends on OCTEONTX2_PF && NET_SWITCHDEV
> + default m
> + help
> + This driver supports Marvell's RVU E-Switch that
> + provides internal SRIOV packet steering and switching for the
> diff --git a/drivers/net/ethernet/marvell/octeontx2/af/Makefile b/drivers/net/ethernet/marvell/octeontx2/af/Makefile
> index 3cf4c8285c90..ccea37847df8 100644
> --- a/drivers/net/ethernet/marvell/octeontx2/af/Makefile
> +++ b/drivers/net/ethernet/marvell/octeontx2/af/Makefile
> @@ -11,4 +11,5 @@ rvu_mbox-y := mbox.o rvu_trace.o
> rvu_af-y := cgx.o rvu.o rvu_cgx.o rvu_npa.o rvu_nix.o \
> rvu_reg.o rvu_npc.o rvu_debugfs.o ptp.o rvu_npc_fs.o \
> rvu_cpt.o rvu_devlink.o rpm.o rvu_cn10k.o rvu_switch.o \
> - rvu_sdp.o rvu_npc_hash.o mcs.o mcs_rvu_if.o mcs_cnf10kbo
> + rvu_sdp.o rvu_npc_hash.o mcs.o mcs_rvu_if.o mcs_cnf10kbo \
> + rvu_rep.o
> diff --git a/drivers/net/ethernet/marvell/octeontx2/af/mbox.h b/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
> index 10efbd56abd1..c77c02730cf9 100644
> --- a/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
> +++ b/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
> @@ -143,6 +143,7 @@ M(LMTST_TBL_SETUP, 0x00a, lmtst_tbl_setup, lmtst_tbl_setup_req, \
> msg_rsp) \
> 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) \
> /* 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) \
> @@ -1524,6 +1525,13 @@ struct ptp_get_cap_rsp {
> u64 cap;
> };
>
> +struct get_rep_cnt_rsp {
> + struct mbox_msghdr hdr;
> + u16 rep_cnt;
> + u16 rep_pf_map[64];
> + u64 rsvd;
> +};
> +
> 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 e7ff2f1b021f..1d76d52d7a5d 100644
> --- a/drivers/net/ethernet/marvell/octeontx2/af/rvu.h
> +++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu.h
> @@ -593,6 +593,9 @@ struct rvu {
> spinlock_t cpt_intr_lock;
>
> struct mutex mbox_lock; /* Serialize mbox up and down msgs */
> + u16 rep_pcifunc;
> + int rep_cnt;
> + u16 *rep2pfvf_map;
> };
>
> static inline void rvu_write64(struct rvu *rvu, u64 block, u64 offset, u64 val)
> @@ -821,6 +824,14 @@ bool is_sdp_pfvf(u16 pcifunc);
> bool is_sdp_pf(u16 pcifunc);
> bool is_sdp_vf(struct rvu *rvu, u16 pcifunc);
>
> +static inline bool is_rep_dev(struct rvu *rvu, u16 pcifunc)
> +{
> + if (rvu->rep_pcifunc && rvu->rep_pcifunc == pcifunc)
> + return true;
> +
> + return false;
> +}
> +
> /* CGX APIs */
> static inline bool is_pf_cgxmapped(struct rvu *rvu, u8 pf)
> {
> diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
> index cb795d09971e..4ef5bb7b337f 100644
> --- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
> +++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
> @@ -329,7 +329,8 @@ static bool is_valid_txschq(struct rvu *rvu, int blkaddr,
>
> /* TLs aggegating traffic are shared across PF and VFs */
> if (lvl >= hw->cap.nix_tx_aggr_lvl) {
> - if (rvu_get_pf(map_func) != rvu_get_pf(pcifunc))
> + if ((nix_get_tx_link(rvu, map_func) != nix_get_tx_link(rvu, pcifunc)) &&
> + (rvu_get_pf(map_func) != rvu_get_pf(pcifunc)))
> return false;
> else
> return true;
> @@ -1631,6 +1632,12 @@ int rvu_mbox_handler_nix_lf_alloc(struct rvu *rvu,
> cfg = NPC_TX_DEF_PKIND;
> rvu_write64(rvu, blkaddr, NIX_AF_LFX_TX_PARSE_CFG(nixlf), cfg);
>
> + if (is_rep_dev(rvu, pcifunc)) {
> + pfvf->tx_chan_base = RVU_SWITCH_LBK_CHAN;
> + pfvf->tx_chan_cnt = 1;
> + goto exit;
> + }
> +
> intf = is_lbk_vf(rvu, pcifunc) ? NIX_INTF_TYPE_LBK : NIX_INTF_TYPE_CGX;
> if (is_sdp_pfvf(pcifunc))
> intf = NIX_INTF_TYPE_SDP;
> @@ -1701,6 +1708,9 @@ int rvu_mbox_handler_nix_lf_free(struct rvu *rvu, struct nix_lf_free_req *req,
> if (nixlf < 0)
> return NIX_AF_ERR_AF_LF_INVALID;
>
> + if (is_rep_dev(rvu, pcifunc))
> + goto free_lf;
> +
> if (req->flags & NIX_LF_DISABLE_FLOWS)
> rvu_npc_disable_mcam_entries(rvu, pcifunc, nixlf);
> else
> @@ -1712,6 +1722,7 @@ int rvu_mbox_handler_nix_lf_free(struct rvu *rvu, struct nix_lf_free_req *req,
>
> nix_interface_deinit(rvu, pcifunc, nixlf);
>
> +free_lf:
> /* Reset this NIX LF */
> err = rvu_lf_reset(rvu, block, nixlf);
> if (err) {
> @@ -2007,7 +2018,7 @@ static void nix_get_txschq_range(struct rvu *rvu, u16 pcifunc,
> struct rvu_hwinfo *hw = rvu->hw;
> int pf = rvu_get_pf(pcifunc);
>
> - if (is_lbk_vf(rvu, pcifunc)) { /* LBK links */
> + if (is_lbk_vf(rvu, pcifunc) || is_rep_dev(rvu, pcifunc)) { /* LBK links */
> *start = hw->cap.nix_txsch_per_cgx_lmac * link;
> *end = *start + hw->cap.nix_txsch_per_lbk_lmac;
> } else if (is_pf_cgxmapped(rvu, pf)) { /* CGX links */
> @@ -4519,7 +4530,7 @@ int rvu_mbox_handler_nix_set_hw_frs(struct rvu *rvu, struct nix_frs_cfg *req,
> if (!nix_hw)
> return NIX_AF_ERR_INVALID_NIXBLK;
>
> - if (is_lbk_vf(rvu, pcifunc))
> + if (is_lbk_vf(rvu, pcifunc) || is_rep_dev(rvu, pcifunc))
> rvu_get_lbk_link_max_frs(rvu, &max_mtu);
> else
> rvu_get_lmac_link_max_frs(rvu, &max_mtu);
> @@ -4547,6 +4558,8 @@ int rvu_mbox_handler_nix_set_hw_frs(struct rvu *rvu, struct nix_frs_cfg *req,
> /* For VFs of PF0 ingress is LBK port, so config LBK link */
> pfvf = rvu_get_pfvf(rvu, pcifunc);
> link = hw->cgx_links + pfvf->lbkid;
> + } else if (is_rep_dev(rvu, pcifunc)) {
> + link = hw->cgx_links + 0;
> }
>
> if (link < 0)
> diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_rep.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_rep.c
> new file mode 100644
> index 000000000000..d07cb356d3d6
> --- /dev/null
> +++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_rep.c
> @@ -0,0 +1,48 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/* Marvell RVU Admin Function driver
> + *
> + * Copyright (C) 2024 Marvell.
> + *
> + */
> +
> +#include <linux/types.h>
> +#include <linux/device.h>
> +#include <linux/module.h>
> +#include <linux/pci.h>
> +
> +#include "rvu.h"
> +#include "rvu_reg.h"
> +
> +int rvu_mbox_handler_get_rep_cnt(struct rvu *rvu, struct msg_req *req,
> + struct get_rep_cnt_rsp *rsp)
> +{
> + int pf, vf, numvfs, hwvf, rep = 0;
> + u16 pcifunc;
> +
> + rvu->rep_pcifunc = req->hdr.pcifunc;
> + rsp->rep_cnt = rvu->cgx_mapped_pfs + rvu->cgx_mapped_vfs;
> + rvu->rep_cnt = rsp->rep_cnt;
> +
> + rvu->rep2pfvf_map = devm_kzalloc(rvu->dev, rvu->rep_cnt *
> + sizeof(u16), GFP_KERNEL);
[Kalesh] Any reason to use "devm_kzalloc" here? Why not kzalloc()
> + if (!rvu->rep2pfvf_map)
> + return -ENOMEM;
> +
> + for (pf = 0; pf < rvu->hw->total_pfs; pf++) {
> + if (!is_pf_cgxmapped(rvu, pf))
> + continue;
> + pcifunc = pf << RVU_PFVF_PF_SHIFT;
> + rvu->rep2pfvf_map[rep] = pcifunc;
> + rsp->rep_pf_map[rep] = pcifunc;
> + rep++;
> + rvu_get_pf_numvfs(rvu, pf, &numvfs, &hwvf);
> + for (vf = 0; vf < numvfs; vf++) {
> + rvu->rep2pfvf_map[rep] = pcifunc |
> + ((vf + 1) & RVU_PFVF_FUNC_MASK);
> + rsp->rep_pf_map[rep] = rvu->rep2pfvf_map[rep];
> + rep++;
> + }
> + }
> + return 0;
> +}
> +
> diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/Makefile b/drivers/net/ethernet/marvell/octeontx2/nic/Makefile
> index 5664f768cb0c..69ee78dc8aad 100644
> --- a/drivers/net/ethernet/marvell/octeontx2/nic/Makefile
> +++ b/drivers/net/ethernet/marvell/octeontx2/nic/Makefile
> @@ -5,11 +5,13 @@
>
> obj-$(CONFIG_OCTEONTX2_PF) += rvu_nicpf.o otx2_ptp.o
> obj-$(CONFIG_OCTEONTX2_VF) += rvu_nicvf.o otx2_ptp.o
> +obj-$(CONFIG_RVU_ESWITCH) += rvu_rep.o
>
> rvu_nicpf-y := otx2_pf.o otx2_common.o otx2_txrx.o otx2_ethtool.o \
> otx2_flows.o otx2_tc.o cn10k.o otx2_dmac_flt.o \
> otx2_devlink.o qos_sq.o qos.o
> rvu_nicvf-y := otx2_vf.o otx2_devlink.o
> +rvu_rep-y := rep.o
>
> rvu_nicpf-$(CONFIG_DCB) += otx2_dcbnl.o
> rvu_nicvf-$(CONFIG_DCB) += otx2_dcbnl.o
> diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
> index e6d7b2487ed1..79ec86035c16 100644
> --- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
> +++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
> @@ -29,6 +29,7 @@
> #include "otx2_devlink.h"
> #include <rvu_trace.h>
> #include "qos.h"
> +#include "rep.h"
>
> /* IPv4 flag more fragment bit */
> #define IPV4_FLAG_MORE 0x20
> @@ -439,6 +440,7 @@ struct otx2_nic {
> #define OTX2_FLAG_DMACFLTR_SUPPORT BIT_ULL(14)
> #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)
> u64 flags;
> u64 *cq_op_addr;
>
> @@ -506,11 +508,19 @@ struct otx2_nic {
> #if IS_ENABLED(CONFIG_MACSEC)
> struct cn10k_mcs_cfg *macsec_cfg;
> #endif
> +
> +#if IS_ENABLED(CONFIG_RVU_ESWITCH)
> + struct rep_dev **reps;
> + int rep_cnt;
> + u16 rep_pf_map[RVU_MAX_REP];
> + u16 esw_mode;
> +#endif
> };
>
> static inline bool is_otx2_lbkvf(struct pci_dev *pdev)
> {
> - return pdev->device == PCI_DEVID_OCTEONTX2_RVU_AFVF;
> + return (pdev->device == PCI_DEVID_OCTEONTX2_RVU_AFVF) ||
> + (pdev->device == PCI_DEVID_RVU_REP);
> }
>
> static inline bool is_96xx_A0(struct pci_dev *pdev)
> diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
> index 88886ea864cc..119c99768a85 100644
> --- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
> +++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
> @@ -1502,10 +1502,11 @@ int otx2_init_hw_resources(struct otx2_nic *pf)
> hw->sqpool_cnt = otx2_get_total_tx_queues(pf);
> hw->pool_cnt = hw->rqpool_cnt + hw->sqpool_cnt;
>
> - /* Maximum hardware supported transmit length */
> - pf->tx_max_pktlen = pf->netdev->max_mtu + OTX2_ETH_HLEN;
> -
> - pf->rbsize = otx2_get_rbuf_size(pf, pf->netdev->mtu);
> + if (!is_rep_dev(pf->pdev)) {
> + /* Maximum hardware supported transmit length */
> + pf->tx_max_pktlen = pf->netdev->max_mtu + OTX2_ETH_HLEN;
> + pf->rbsize = otx2_get_rbuf_size(pf, pf->netdev->mtu);
> + }
>
> mutex_lock(&mbox->lock);
> /* NPA init */
> @@ -1634,11 +1635,12 @@ void otx2_free_hw_resources(struct otx2_nic *pf)
> otx2_pfc_txschq_stop(pf);
> #endif
>
> - otx2_clean_qos_queues(pf);
> + if (!is_rep_dev(pf->pdev))
> + otx2_clean_qos_queues(pf);
>
> mutex_lock(&mbox->lock);
> /* Disable backpressure */
> - if (!(pf->pcifunc & RVU_PFVF_FUNC_MASK))
> + if (!is_otx2_lbkvf(pf->pdev))
> otx2_nix_config_bp(pf, false);
> mutex_unlock(&mbox->lock);
>
> @@ -1670,7 +1672,8 @@ void otx2_free_hw_resources(struct otx2_nic *pf)
> otx2_free_cq_res(pf);
>
> /* Free all ingress bandwidth profiles allocated */
> - cn10k_free_all_ipolicers(pf);
> + if (!is_rep_dev(pf->pdev))
> + cn10k_free_all_ipolicers(pf);
>
> mutex_lock(&mbox->lock);
> /* Reset NIX LF */
> diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c
> index 8223780fc269..2a2cfa77bd4d 100644
> --- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c
> +++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c
> @@ -375,11 +375,13 @@ static void otx2_rcv_pkt_handler(struct otx2_nic *pfvf,
> }
> start += sizeof(*sg);
> }
> - otx2_set_rxhash(pfvf, cqe, skb);
>
> - skb_record_rx_queue(skb, cq->cq_idx);
> - if (pfvf->netdev->features & NETIF_F_RXCSUM)
> - skb->ip_summed = CHECKSUM_UNNECESSARY;
> + if (!(pfvf->flags & OTX2_FLAG_REP_MODE_ENABLED)) {
> + otx2_set_rxhash(pfvf, cqe, skb);
> + skb_record_rx_queue(skb, cq->cq_idx);
> + if (pfvf->netdev->features & NETIF_F_RXCSUM)
> + skb->ip_summed = CHECKSUM_UNNECESSARY;
> + }
>
> skb_mark_for_recycle(skb);
>
> @@ -463,7 +465,11 @@ static int otx2_tx_napi_handler(struct otx2_nic *pfvf,
> process_cqe:
> qidx = cq->cq_idx - pfvf->hw.rx_queues;
> sq = &pfvf->qset.sq[qidx];
> - ndev = pfvf->netdev;
> +
> + if (pfvf->flags & OTX2_FLAG_REP_MODE_ENABLED)
> + ndev = pfvf->reps[qidx]->netdev;
> + else
> + ndev = pfvf->netdev;
>
> while (likely(processed_cqe < budget) && cq->pend_cqe) {
> cqe = (struct nix_cqe_tx_s *)otx2_get_next_cqe(cq);
> @@ -500,6 +506,9 @@ static int otx2_tx_napi_handler(struct otx2_nic *pfvf,
>
> if (qidx >= pfvf->hw.tx_queues)
> qidx -= pfvf->hw.xdp_queues;
> +
> + if (pfvf->flags & OTX2_FLAG_REP_MODE_ENABLED)
> + qidx = 0;
> txq = netdev_get_tx_queue(pfvf->netdev, qidx);
> netdev_tx_completed_queue(txq, tx_pkts, tx_bytes);
> /* Check if queue was stopped earlier due to ring full */
> diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/rep.c b/drivers/net/ethernet/marvell/octeontx2/nic/rep.c
> new file mode 100644
> index 000000000000..b892a7fe3ddc
> --- /dev/null
> +++ b/drivers/net/ethernet/marvell/octeontx2/nic/rep.c
> @@ -0,0 +1,221 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/* Marvell RVU representor driver
> + *
> + * Copyright (C) 2024 Marvell.
> + *
> + */
> +
> +#include <linux/etherdevice.h>
> +#include <linux/module.h>
> +#include <linux/pci.h>
> +#include <linux/net_tstamp.h>
> +
> +#include "otx2_common.h"
> +#include "cn10k.h"
> +#include "otx2_reg.h"
> +#include "rep.h"
> +
> +#define DRV_NAME "rvu_rep"
> +#define DRV_STRING "Marvell RVU Representor Driver"
> +
> +static const struct pci_device_id rvu_rep_id_table[] = {
> + { PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, PCI_DEVID_RVU_REP) },
> + { }
> +};
> +
> +MODULE_AUTHOR("Marvell International Ltd.");
> +MODULE_DESCRIPTION(DRV_STRING);
> +MODULE_LICENSE("GPL");
> +MODULE_DEVICE_TABLE(pci, rvu_rep_id_table);
> +
> +static int rvu_rep_rsrc_free(struct otx2_nic *priv)
[Kalesh] You can change this to a void function
> +{
> + struct otx2_qset *qset = &priv->qset;
> + int wrk;
> +
> + for (wrk = 0; wrk < priv->qset.cq_cnt; wrk++)
> + cancel_delayed_work_sync(&priv->refill_wrk[wrk].pool_refill_work);
> + devm_kfree(priv->dev, priv->refill_wrk);
> +
> + otx2_free_hw_resources(priv);
> + otx2_free_queue_mem(qset);
> + return 0;
> +}
> +
> +static int rvu_rep_rsrc_init(struct otx2_nic *priv)
> +{
> + struct otx2_qset *qset = &priv->qset;
> + int err = 0;
[Kalesh] No need to initialize "rc" here
> +
> + err = otx2_alloc_queue_mem(priv);
> + if (err)
> + return err;
> +
> + priv->hw.max_mtu = otx2_get_max_mtu(priv);
> + priv->tx_max_pktlen = priv->hw.max_mtu + OTX2_ETH_HLEN;
> + priv->rbsize = ALIGN(priv->hw.rbuf_len, OTX2_ALIGN) + OTX2_HEAD_ROOM;
> +
> + err = otx2_init_hw_resources(priv);
> + if (err)
> + goto err_free_rsrc;
> +
> + /* Set maximum frame size allowed in HW */
> + err = otx2_hw_set_mtu(priv, priv->hw.max_mtu);
> + if (err) {
> + dev_err(priv->dev, "Failed to set HW MTU\n");
> + goto err_free_rsrc;
> + }
> + return 0;
> +
> +err_free_rsrc:
> + otx2_free_hw_resources(priv);
> + otx2_free_queue_mem(qset);
> + return err;
> +}
> +
> +static int rvu_get_rep_cnt(struct otx2_nic *priv)
> +{
> + struct get_rep_cnt_rsp *rsp;
> + struct mbox_msghdr *msghdr;
> + struct msg_req *req;
> + int err, rep;
> +
> + mutex_lock(&priv->mbox.lock);
> + req = otx2_mbox_alloc_msg_get_rep_cnt(&priv->mbox);
> + if (!req) {
> + mutex_unlock(&priv->mbox.lock);
> + return -ENOMEM;
> + }
> + err = otx2_sync_mbox_msg(&priv->mbox);
> + if (err)
> + goto exit;
> +
> + msghdr = otx2_mbox_get_rsp(&priv->mbox.mbox, 0, &req->hdr);
> + if (IS_ERR(msghdr)) {
> + err = PTR_ERR(rsp);
[Kalesh] "rsp" is not initialized here. Did you mean "err = PTR_ERR(msghdr);"?
> + goto exit;
> + }
> +
> + rsp = (struct get_rep_cnt_rsp *)msghdr;
> + priv->hw.tx_queues = rsp->rep_cnt;
> + priv->hw.rx_queues = rsp->rep_cnt;
> + priv->rep_cnt = rsp->rep_cnt;
> + for (rep = 0; rep < priv->rep_cnt; rep++)
> + priv->rep_pf_map[rep] = rsp->rep_pf_map[rep];
> +
> +exit:
> + mutex_unlock(&priv->mbox.lock);
> + return err;
> +}
> +
> +static int rvu_rep_probe(struct pci_dev *pdev, const struct pci_device_id *id)
> +{
> + struct device *dev = &pdev->dev;
> + struct otx2_nic *priv;
> + struct otx2_hw *hw;
> + int err;
> +
> + err = pcim_enable_device(pdev);
> + if (err) {
> + dev_err(dev, "Failed to enable PCI device\n");
> + return err;
> + }
> +
> + err = pci_request_regions(pdev, DRV_NAME);
> + if (err) {
> + dev_err(dev, "PCI request regions failed 0x%x\n", err);
> + return err;
> + }
> +
> + err = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(48));
> + if (err) {
> + dev_err(dev, "DMA mask config failed, abort\n");
> + goto err_release_regions;
> + }
> +
> + pci_set_master(pdev);
> +
> + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
> + if (!priv)
> + return -ENOMEM;
[Kalesh: goto err_release_regions; ??
> + pci_set_drvdata(pdev, priv);
> + priv->pdev = pdev;
> + priv->dev = dev;
> + priv->flags |= OTX2_FLAG_INTF_DOWN;
> + priv->flags |= OTX2_FLAG_REP_MODE_ENABLED;
> +
> + hw = &priv->hw;
> + hw->pdev = pdev;
> + hw->max_queues = OTX2_MAX_CQ_CNT;
> + hw->rbuf_len = OTX2_DEFAULT_RBUF_LEN;
> + hw->xqe_size = 128;
> +
> + err = otx2_init_rsrc(pdev, priv);
> + if (err)
> + goto err_release_regions;
> +
> + err = rvu_get_rep_cnt(priv);
> + if (err)
> + goto err_detach_rsrc;
> +
> + err = rvu_rep_rsrc_init(priv);
> + if (err)
> + goto err_detach_rsrc;
> +
> + return 0;
> +
> +err_detach_rsrc:
> + if (priv->hw.lmt_info)
> + free_percpu(priv->hw.lmt_info);
> + if (test_bit(CN10K_LMTST, &priv->hw.cap_flag))
> + qmem_free(priv->dev, priv->dync_lmt);
> + otx2_detach_resources(&priv->mbox);
> + otx2_disable_mbox_intr(priv);
> + otx2_pfaf_mbox_destroy(priv);
> + pci_free_irq_vectors(pdev);
> +err_release_regions:
> + pci_set_drvdata(pdev, NULL);
> + pci_release_regions(pdev);
> + return err;
> +}
> +
> +static void rvu_rep_remove(struct pci_dev *pdev)
> +{
> + struct otx2_nic *priv = pci_get_drvdata(pdev);
> +
> + rvu_rep_rsrc_free(priv);
> + otx2_detach_resources(&priv->mbox);
> + if (priv->hw.lmt_info)
> + free_percpu(priv->hw.lmt_info);
> + if (test_bit(CN10K_LMTST, &priv->hw.cap_flag))
> + qmem_free(priv->dev, priv->dync_lmt);
> + otx2_disable_mbox_intr(priv);
> + otx2_pfaf_mbox_destroy(priv);
> + pci_free_irq_vectors(priv->pdev);
> + pci_set_drvdata(pdev, NULL);
> + pci_release_regions(pdev);
> +}
> +
> +static struct pci_driver rvu_rep_driver = {
> + .name = DRV_NAME,
> + .id_table = rvu_rep_id_table,
> + .probe = rvu_rep_probe,
> + .remove = rvu_rep_remove,
> + .shutdown = rvu_rep_remove,
> +};
> +
> +static int __init rvu_rep_init_module(void)
> +{
> + pr_info("%s: %s\n", DRV_NAME, DRV_STRING);
> +
> + return pci_register_driver(&rvu_rep_driver);
> +}
> +
> +static void __exit rvu_rep_cleanup_module(void)
> +{
> + pci_unregister_driver(&rvu_rep_driver);
> +}
> +
> +module_init(rvu_rep_init_module);
> +module_exit(rvu_rep_cleanup_module);
> +
> diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/rep.h b/drivers/net/ethernet/marvell/octeontx2/nic/rep.h
> new file mode 100644
> index 000000000000..30cce17eb48b
> --- /dev/null
> +++ b/drivers/net/ethernet/marvell/octeontx2/nic/rep.h
> @@ -0,0 +1,32 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/* Marvell RVU REPRESENTOR driver
> + *
> + * Copyright (C) 2024 Marvell.
> + *
> + */
> +
> +#ifndef REP_H
> +#define REP_H
> +
> +#include <linux/pci.h>
> +
> +#include "otx2_reg.h"
> +#include "otx2_txrx.h"
> +#include "otx2_common.h"
> +
> +#define PCI_DEVID_RVU_REP 0xA0E0
> +
> +#define RVU_MAX_REP OTX2_MAX_CQ_CNT
> +struct rep_dev {
> + struct otx2_nic *mdev;
> + struct net_device *netdev;
> + u16 rep_id;
> + u16 pcifunc;
> +};
> +
> +static inline bool is_rep_dev(struct pci_dev *pdev)
> +{
> + return pdev->device == PCI_DEVID_RVU_REP;
> +}
> +
> +#endif /* REP_H */
> --
> 2.25.1
>


--
Regards,
Kalesh A P

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