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Y. Srinivasan" , Haiyang Zhang , Wei Liu , Dexuan Cui , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Long Li , Simon Horman , Konstantin Taranov , Souradeep Chakrabarti , Erick Archer , Pavan Chebbi , Ahmed Zaki , Colin Ian King , Shradha Gupta Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="00000000000057a3470623a1f4c9" --00000000000057a3470623a1f4c9 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Tue, Oct 1, 2024 at 9:10=E2=80=AFAM Shradha Gupta wrote: > > Implement debugfs in MANA driver to be able to view RX,TX,EQ queue > specific attributes and dump their gdma queues. > These dumps can be used by other userspace utilities to improve > debuggability and troubleshooting > > Following files are added in debugfs: > > /sys/kernel/debug/mana/ > |-------------- 1 > |--------------- EQs > | |------- eq0 > | | |---head > | | |---tail > | | |---eq_dump > | |------- eq1 > | . > | . > | > |--------------- adapter-MTU > |--------------- vport0 > |------- RX-0 > | |---cq_budget > | |---cq_dump > | |---cq_head > | |---cq_tail > | |---rq_head > | |---rq_nbuf > | |---rq_tail > | |---rxq_dump > |------- RX-1 > . > . > |------- TX-0 > | |---cq_budget > | |---cq_dump > | |---cq_head > | |---cq_tail > | |---sq_head > | |---sq_pend_skb_qlen > | |---sq_tail > | |---txq_dump > |------- TX-1 > . > . > > Signed-off-by: Shradha Gupta > Reviewed-by: Haiyang Zhang > --- > .../net/ethernet/microsoft/mana/gdma_main.c | 45 +++++++- > drivers/net/ethernet/microsoft/mana/mana_en.c | 105 +++++++++++++++++- > include/net/mana/gdma.h | 6 +- > include/net/mana/mana.h | 8 ++ > 4 files changed, 161 insertions(+), 3 deletions(-) > > diff --git a/drivers/net/ethernet/microsoft/mana/gdma_main.c b/drivers/ne= t/ethernet/microsoft/mana/gdma_main.c > index ca4ed58f1206..3541bc5e7a48 100644 > --- a/drivers/net/ethernet/microsoft/mana/gdma_main.c > +++ b/drivers/net/ethernet/microsoft/mana/gdma_main.c > @@ -5,9 +5,12 @@ > #include > #include > #include > +#include > > #include > > +struct dentry *mana_debugfs_root; > + > static u32 mana_gd_r32(struct gdma_context *g, u64 offset) > { > return readl(g->bar0_va + offset); > @@ -1516,6 +1519,13 @@ static int mana_gd_probe(struct pci_dev *pdev, con= st struct pci_device_id *ent) > gc->bar0_va =3D bar0_va; > gc->dev =3D &pdev->dev; > > + if (gc->is_pf) { > + gc->mana_pci_debugfs =3D debugfs_create_dir("0", mana_deb= ugfs_root); > + } else { > + gc->mana_pci_debugfs =3D debugfs_create_dir(pci_slot_name= (pdev->slot), > + mana_debugfs_ro= ot); > + } [Kalesh] You can remove the braces here. > + > err =3D mana_gd_setup(pdev); > if (err) > goto unmap_bar; > @@ -1529,6 +1539,13 @@ static int mana_gd_probe(struct pci_dev *pdev, con= st struct pci_device_id *ent) > cleanup_gd: > mana_gd_cleanup(pdev); > unmap_bar: > + /* > + * at this point we know that the other debugfs child dir/files > + * are either not yet created or are already cleaned up. > + * The pci debugfs folder clean-up now, will only be cleaning up > + * adapter-MTU file and apc->mana_pci_debugfs folder. > + */ > + debugfs_remove_recursive(gc->mana_pci_debugfs); > pci_iounmap(pdev, bar0_va); > free_gc: > pci_set_drvdata(pdev, NULL); > @@ -1549,6 +1566,8 @@ static void mana_gd_remove(struct pci_dev *pdev) > > mana_gd_cleanup(pdev); > > + debugfs_remove_recursive(gc->mana_pci_debugfs); > + > pci_iounmap(pdev, gc->bar0_va); > > vfree(gc); > @@ -1600,6 +1619,8 @@ static void mana_gd_shutdown(struct pci_dev *pdev) > > mana_gd_cleanup(pdev); > > + debugfs_remove_recursive(gc->mana_pci_debugfs); > + > pci_disable_device(pdev); > } > > @@ -1619,7 +1640,29 @@ static struct pci_driver mana_driver =3D { > .shutdown =3D mana_gd_shutdown, > }; > > -module_pci_driver(mana_driver); > +static int __init mana_driver_init(void) > +{ > + int err; > + > + mana_debugfs_root =3D debugfs_create_dir("mana", NULL); > + > + err =3D pci_register_driver(&mana_driver); > + > + if (err) > + debugfs_remove(mana_debugfs_root); > + > + return err; > +} > + > +static void __exit mana_driver_exit(void) > +{ > + debugfs_remove(mana_debugfs_root); > + > + pci_unregister_driver(&mana_driver); > +} > + > +module_init(mana_driver_init); > +module_exit(mana_driver_exit); > > MODULE_DEVICE_TABLE(pci, mana_id_table); > > diff --git a/drivers/net/ethernet/microsoft/mana/mana_en.c b/drivers/net/= ethernet/microsoft/mana/mana_en.c > index c47266d1c7c2..255f3189f6fa 100644 > --- a/drivers/net/ethernet/microsoft/mana/mana_en.c > +++ b/drivers/net/ethernet/microsoft/mana/mana_en.c > @@ -9,6 +9,7 @@ > #include > #include > #include > +#include > > #include > #include > @@ -30,6 +31,21 @@ static void mana_adev_idx_free(int idx) > ida_free(&mana_adev_ida, idx); > } > > +static ssize_t mana_dbg_q_read(struct file *filp, char __user *buf, size= _t count, > + loff_t *pos) > +{ > + struct gdma_queue *gdma_q =3D filp->private_data; > + > + return simple_read_from_buffer(buf, count, pos, gdma_q->queue_mem= _ptr, > + gdma_q->queue_size); > +} > + > +static const struct file_operations mana_dbg_q_fops =3D { > + .owner =3D THIS_MODULE, > + .open =3D simple_open, > + .read =3D mana_dbg_q_read, > +}; > + > /* Microsoft Azure Network Adapter (MANA) functions */ > > static int mana_open(struct net_device *ndev) > @@ -721,6 +737,13 @@ static const struct net_device_ops mana_devops =3D { > > static void mana_cleanup_port_context(struct mana_port_context *apc) > { > + /* > + * at this point all dir/files under the vport directory > + * are already cleaned up. > + * We are sure the apc->mana_port_debugfs remove will not > + * cause any freed memory access issues > + */ > + debugfs_remove(apc->mana_port_debugfs); > kfree(apc->rxqs); > apc->rxqs =3D NULL; > } > @@ -943,6 +966,8 @@ static int mana_query_device_cfg(struct mana_context = *ac, u32 proto_major_ver, > else > gc->adapter_mtu =3D ETH_FRAME_LEN; > > + debugfs_create_u16("adapter-MTU", 0400, gc->mana_pci_debugfs, &gc= ->adapter_mtu); > + > return 0; > } > > @@ -1228,6 +1253,8 @@ static void mana_destroy_eq(struct mana_context *ac= ) > if (!ac->eqs) > return; > > + debugfs_remove_recursive(ac->mana_eqs_debugfs); > + > for (i =3D 0; i < gc->max_num_queues; i++) { > eq =3D ac->eqs[i].eq; > if (!eq) > @@ -1240,6 +1267,18 @@ static void mana_destroy_eq(struct mana_context *a= c) > ac->eqs =3D NULL; > } > > +static void mana_create_eq_debugfs(struct mana_context *ac, int i) > +{ > + struct mana_eq eq =3D ac->eqs[i]; > + char eqnum[32]; > + > + sprintf(eqnum, "eq%d", i); > + eq.mana_eq_debugfs =3D debugfs_create_dir(eqnum, ac->mana_eqs_deb= ugfs); > + debugfs_create_u32("head", 0400, eq.mana_eq_debugfs, &eq.eq->head= ); > + debugfs_create_u32("tail", 0400, eq.mana_eq_debugfs, &eq.eq->tail= ); > + debugfs_create_file("eq_dump", 0400, eq.mana_eq_debugfs, eq.eq, &= mana_dbg_q_fops); > +} > + > static int mana_create_eq(struct mana_context *ac) > { > struct gdma_dev *gd =3D ac->gdma_dev; > @@ -1260,11 +1299,14 @@ static int mana_create_eq(struct mana_context *ac= ) > spec.eq.context =3D ac->eqs; > spec.eq.log2_throttle_limit =3D LOG2_EQ_THROTTLE; > > + ac->mana_eqs_debugfs =3D debugfs_create_dir("EQs", gc->mana_pci_d= ebugfs); > + > for (i =3D 0; i < gc->max_num_queues; i++) { > spec.eq.msix_index =3D (i + 1) % gc->num_msix_usable; > err =3D mana_gd_create_mana_eq(gd, &spec, &ac->eqs[i].eq)= ; > if (err) > goto out; > + mana_create_eq_debugfs(ac, i); > } > > return 0; > @@ -1871,6 +1913,8 @@ static void mana_destroy_txq(struct mana_port_conte= xt *apc) > return; > > for (i =3D 0; i < apc->num_queues; i++) { > + debugfs_remove_recursive(apc->tx_qp[i].mana_tx_debugfs); > + > napi =3D &apc->tx_qp[i].tx_cq.napi; > if (apc->tx_qp[i].txq.napi_initialized) { > napi_synchronize(napi); > @@ -1889,6 +1933,31 @@ static void mana_destroy_txq(struct mana_port_cont= ext *apc) > apc->tx_qp =3D NULL; > } > > +static void mana_create_txq_debugfs(struct mana_port_context *apc, int i= dx) > +{ > + struct mana_tx_qp *tx_qp =3D &apc->tx_qp[idx]; > + char qnum[32]; > + > + sprintf(qnum, "TX-%d", idx); > + tx_qp->mana_tx_debugfs =3D debugfs_create_dir(qnum, apc->mana_por= t_debugfs); > + debugfs_create_u32("sq_head", 0400, tx_qp->mana_tx_debugfs, > + &tx_qp->txq.gdma_sq->head); > + debugfs_create_u32("sq_tail", 0400, tx_qp->mana_tx_debugfs, > + &tx_qp->txq.gdma_sq->tail); > + debugfs_create_u32("sq_pend_skb_qlen", 0400, tx_qp->mana_tx_debug= fs, > + &tx_qp->txq.pending_skbs.qlen); > + debugfs_create_u32("cq_head", 0400, tx_qp->mana_tx_debugfs, > + &tx_qp->tx_cq.gdma_cq->head); > + debugfs_create_u32("cq_tail", 0400, tx_qp->mana_tx_debugfs, > + &tx_qp->tx_cq.gdma_cq->tail); > + debugfs_create_u32("cq_budget", 0400, tx_qp->mana_tx_debugfs, > + &tx_qp->tx_cq.budget); > + debugfs_create_file("txq_dump", 0400, tx_qp->mana_tx_debugfs, > + tx_qp->txq.gdma_sq, &mana_dbg_q_fops); > + debugfs_create_file("cq_dump", 0400, tx_qp->mana_tx_debugfs, > + tx_qp->tx_cq.gdma_cq, &mana_dbg_q_fops); > +} > + > static int mana_create_txq(struct mana_port_context *apc, > struct net_device *net) > { > @@ -2000,6 +2069,8 @@ static int mana_create_txq(struct mana_port_context= *apc, > > gc->cq_table[cq->gdma_id] =3D cq->gdma_cq; > > + mana_create_txq_debugfs(apc, i); > + > netif_napi_add_tx(net, &cq->napi, mana_poll); > napi_enable(&cq->napi); > txq->napi_initialized =3D true; > @@ -2027,6 +2098,8 @@ static void mana_destroy_rxq(struct mana_port_conte= xt *apc, > if (!rxq) > return; > > + debugfs_remove_recursive(rxq->mana_rx_debugfs); > + > napi =3D &rxq->rx_cq.napi; > > if (napi_initialized) { > @@ -2308,6 +2381,28 @@ static struct mana_rxq *mana_create_rxq(struct man= a_port_context *apc, > return NULL; > } > > +static void mana_create_rxq_debugfs(struct mana_port_context *apc, int i= dx) > +{ > + char qnum[32]; > + struct mana_rxq *rxq; [Kalesh] Maintain RCT order here > + > + rxq =3D apc->rxqs[idx]; > + > + sprintf(qnum, "RX-%d", idx); > + rxq->mana_rx_debugfs =3D debugfs_create_dir(qnum, apc->mana_port_= debugfs); > + debugfs_create_u32("rq_head", 0400, rxq->mana_rx_debugfs, &rxq->g= dma_rq->head); > + debugfs_create_u32("rq_tail", 0400, rxq->mana_rx_debugfs, &rxq->g= dma_rq->tail); > + debugfs_create_u32("rq_nbuf", 0400, rxq->mana_rx_debugfs, &rxq->n= um_rx_buf); > + debugfs_create_u32("cq_head", 0400, rxq->mana_rx_debugfs, > + &rxq->rx_cq.gdma_cq->head); > + debugfs_create_u32("cq_tail", 0400, rxq->mana_rx_debugfs, > + &rxq->rx_cq.gdma_cq->tail); > + debugfs_create_u32("cq_budget", 0400, rxq->mana_rx_debugfs, &rxq-= >rx_cq.budget); > + debugfs_create_file("rxq_dump", 0400, rxq->mana_rx_debugfs, rxq->= gdma_rq, &mana_dbg_q_fops); > + debugfs_create_file("cq_dump", 0400, rxq->mana_rx_debugfs, rxq->r= x_cq.gdma_cq, > + &mana_dbg_q_fops); > +} > + > static int mana_add_rx_queues(struct mana_port_context *apc, > struct net_device *ndev) > { > @@ -2326,6 +2421,8 @@ static int mana_add_rx_queues(struct mana_port_cont= ext *apc, > u64_stats_init(&rxq->stats.syncp); > > apc->rxqs[i] =3D rxq; > + > + mana_create_rxq_debugfs(apc, i); > } > > apc->default_rxobj =3D apc->rxqs[0]->rxobj; > @@ -2518,14 +2615,19 @@ void mana_query_gf_stats(struct mana_port_context= *apc) > static int mana_init_port(struct net_device *ndev) > { > struct mana_port_context *apc =3D netdev_priv(ndev); > + struct gdma_dev *gd =3D apc->ac->gdma_dev; > + struct gdma_context *gc; > u32 max_txq, max_rxq, max_queues; > int port_idx =3D apc->port_idx; > + char vport[32]; [Kalesh] Maintain RCT order while declaring variables > int err; > > err =3D mana_init_port_context(apc); > if (err) > return err; > > + gc =3D gd->gdma_context; > + > err =3D mana_query_vport_cfg(apc, port_idx, &max_txq, &max_rxq, > &apc->indir_table_sz); > if (err) { > @@ -2542,7 +2644,8 @@ static int mana_init_port(struct net_device *ndev) > apc->num_queues =3D apc->max_queues; > > eth_hw_addr_set(ndev, apc->mac_addr); > - > + sprintf(vport, "vport%d", port_idx); > + apc->mana_port_debugfs =3D debugfs_create_dir(vport, gc->mana_pci= _debugfs); > return 0; > > reset_apc: > diff --git a/include/net/mana/gdma.h b/include/net/mana/gdma.h > index de47fa533b15..32afb15e46bc 100644 > --- a/include/net/mana/gdma.h > +++ b/include/net/mana/gdma.h > @@ -267,7 +267,8 @@ struct gdma_event { > struct gdma_queue; > > struct mana_eq { > - struct gdma_queue *eq; > + struct gdma_queue *eq; > + struct dentry *mana_eq_debugfs; > }; > > typedef void gdma_eq_callback(void *context, struct gdma_queue *q, > @@ -365,6 +366,7 @@ struct gdma_irq_context { > > struct gdma_context { > struct device *dev; > + struct dentry *mana_pci_debugfs; > > /* Per-vPort max number of queues */ > unsigned int max_num_queues; > @@ -878,5 +880,7 @@ int mana_gd_send_request(struct gdma_context *gc, u32= req_len, const void *req, > u32 resp_len, void *resp); > > int mana_gd_destroy_dma_region(struct gdma_context *gc, u64 dma_region_h= andle); > +void mana_register_debugfs(void); > +void mana_unregister_debugfs(void); > > #endif /* _GDMA_H */ > diff --git a/include/net/mana/mana.h b/include/net/mana/mana.h > index f2a5200d8a0f..5ca4941f15ef 100644 > --- a/include/net/mana/mana.h > +++ b/include/net/mana/mana.h > @@ -350,6 +350,7 @@ struct mana_rxq { > int xdp_rc; /* XDP redirect return code */ > > struct page_pool *page_pool; > + struct dentry *mana_rx_debugfs; > > /* MUST BE THE LAST MEMBER: > * Each receive buffer has an associated mana_recv_buf_oob. > @@ -363,6 +364,8 @@ struct mana_tx_qp { > struct mana_cq tx_cq; > > mana_handle_t tx_object; > + > + struct dentry *mana_tx_debugfs; > }; > > struct mana_ethtool_stats { > @@ -407,6 +410,7 @@ struct mana_context { > u16 num_ports; > > struct mana_eq *eqs; > + struct dentry *mana_eqs_debugfs; > > struct net_device *ports[MAX_PORTS_IN_MANA_DEV]; > }; > @@ -468,6 +472,9 @@ struct mana_port_context { > bool port_st_save; /* Saved port state */ > > struct mana_ethtool_stats eth_stats; > + > + /* Debugfs */ > + struct dentry *mana_port_debugfs; > }; > > netdev_tx_t mana_start_xmit(struct sk_buff *skb, struct net_device *ndev= ); > @@ -494,6 +501,7 @@ int mana_pre_alloc_rxbufs(struct mana_port_context *a= pc, int mtu, int num_queues > void mana_pre_dealloc_rxbufs(struct mana_port_context *apc); > > extern const struct ethtool_ops mana_ethtool_ops; > +extern struct dentry *mana_debugfs_root; > > /* A CQ can be created not associated with any EQ */ > #define GDMA_CQ_NO_EQ 0xffff > -- > 2.34.1 > > --=20 Regards, Kalesh A P --00000000000057a3470623a1f4c9 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIIQiwYJKoZIhvcNAQcCoIIQfDCCEHgCAQExDzANBglghkgBZQMEAgEFADALBgkqhkiG9w0BBwGg gg3iMIIFDTCCA/WgAwIBAgIQeEqpED+lv77edQixNJMdADANBgkqhkiG9w0BAQsFADBMMSAwHgYD VQQLExdHbG9iYWxTaWduIFJvb3QgQ0EgLSBSMzETMBEGA1UEChMKR2xvYmFsU2lnbjETMBEGA1UE AxMKR2xvYmFsU2lnbjAeFw0yMDA5MTYwMDAwMDBaFw0yODA5MTYwMDAwMDBaMFsxCzAJBgNVBAYT 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