diff mbox series

[net-next,v4,03/10] octeontx2-pf: Create representor netdev

Message ID 20240507163921.29683-4-gakula@marvell.com (mailing list archive)
State Changes Requested
Delegated to: Netdev Maintainers
Headers show
Series Introduce RVU representors | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 8 this patch: 8
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 8 of 8 maintainers
netdev/build_clang fail Errors and warnings before: 937 this patch: 25
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn fail Errors and warnings before: 949 this patch: 43
netdev/checkpatch warning WARNING: line length of 81 exceeds 80 columns WARNING: line length of 83 exceeds 80 columns WARNING: line length of 91 exceeds 80 columns
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Geetha sowjanya May 7, 2024, 4:39 p.m. UTC 
Adds initial devlink support to set/get the switchdev mode.
Representor netdevs are created for each rvu devices when
the switch mode is set to 'switchdev'. These netdevs are
be used to control and configure VFs.

Signed-off-by: Geetha sowjanya <gakula@marvell.com>
---
 .../marvell/octeontx2/nic/otx2_devlink.c      |  49 ++++++
 .../net/ethernet/marvell/octeontx2/nic/rep.c  | 157 ++++++++++++++++++
 .../net/ethernet/marvell/octeontx2/nic/rep.h  |   2 +
 3 files changed, 208 insertions(+)

Comments

Jakub Kicinski May 10, 2024, 3:28 a.m. UTC | #1 
On Tue, 7 May 2024 22:09:14 +0530 Geetha sowjanya wrote:
> +	priv->reps = devm_kcalloc(priv->dev, rep_cnt, sizeof(struct rep_dev *),
> +				  GFP_KERNEL);
> +	if (!priv->reps)
> +		return -ENOMEM;

using devm_ here is pointless, the objects are not tied to the lifetime
of the device (there can be created multiple times) and you have to
unregister the netdevs manually, anyway.
Simon Horman May 11, 2024, 2:10 p.m. UTC | #2 
On Tue, May 07, 2024 at 10:09:14PM +0530, Geetha sowjanya wrote:
> Adds initial devlink support to set/get the switchdev mode.
> Representor netdevs are created for each rvu devices when
> the switch mode is set to 'switchdev'. These netdevs are
> be used to control and configure VFs.
> 
> Signed-off-by: Geetha sowjanya <gakula@marvell.com>

...

> diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/rep.c b/drivers/net/ethernet/marvell/octeontx2/nic/rep.c
> index 33ebbcb223e1..ff4318f414f8 100644
> --- a/drivers/net/ethernet/marvell/octeontx2/nic/rep.c
> +++ b/drivers/net/ethernet/marvell/octeontx2/nic/rep.c
> @@ -28,6 +28,157 @@ MODULE_DESCRIPTION(DRV_STRING);
>  MODULE_LICENSE("GPL");
>  MODULE_DEVICE_TABLE(pci, rvu_rep_id_table);
>  
> +static int rvu_rep_napi_init(struct otx2_nic *priv, struct netlink_ext_ack *extack)
> +{
> +	struct otx2_cq_poll *cq_poll = NULL;
> +	struct otx2_qset *qset = &priv->qset;
> +	struct otx2_hw *hw = &priv->hw;
> +	int err = 0, qidx, vec;
> +	char *irq_name;

Please consider using reverse xmas tree - longest line to shortest -
for local variable declarations in new Networking code.

This tool can be helpful: https://github.com/ecree-solarflare/xmastree

...

> +int rvu_rep_create(struct otx2_nic *priv, struct netlink_ext_ack *extack)
> +{
> +	int rep_cnt = priv->rep_cnt;
> +	struct net_device *ndev;
> +	struct rep_dev *rep;
> +	int rep_id, err;
> +	u16 pcifunc;
> +
> +	priv->reps = devm_kcalloc(priv->dev, rep_cnt, sizeof(struct rep_dev *),
> +				  GFP_KERNEL);
> +	if (!priv->reps)
> +		return -ENOMEM;
> +
> +	for (rep_id = 0; rep_id < rep_cnt; rep_id++) {
> +		ndev = alloc_etherdev(sizeof(*rep));
> +		if (!ndev) {
> +			NL_SET_ERR_MSG_FMT_MOD(extack, "PFVF representor:%d
> +					       creation failed", rep_id);

gcc-13 seems unhappy with a string spanning multiple lines.
I suggest living with a line longer than 80 columns in this case.
Maybe:

			NL_SET_ERR_MSG_FMT_MOD(extack,
					       "PFVF representor:%d creation failed",
					       rep_id);

> +			err = -ENOMEM;
> +			goto exit;
> +		}

...
Geetha sowjanya May 13, 2024, 10:35 a.m. UTC | #3 
> -----Original Message-----
> From: Jakub Kicinski <kuba@kernel.org>
> Sent: Friday, May 10, 2024 8:58 AM
> To: Geethasowjanya Akula <gakula@marvell.com>
> Cc: netdev@vger.kernel.org; linux-kernel@vger.kernel.org;
> davem@davemloft.net; pabeni@redhat.com; edumazet@google.com; Sunil
> Kovvuri Goutham <sgoutham@marvell.com>; Subbaraya Sundeep Bhatta
> <sbhatta@marvell.com>; Hariprasad Kelam <hkelam@marvell.com>
> Subject: [EXTERNAL] Re: [net-next PATCH v4 03/10] octeontx2-pf: Create
> representor netdev> 
> ----------------------------------------------------------------------
> On Tue, 7 May 2024 22:09:14 +0530 Geetha sowjanya wrote:
> > +	priv->reps = devm_kcalloc(priv->dev, rep_cnt, sizeof(struct rep_dev *),
> > +				  GFP_KERNEL);
> > +	if (!priv->reps)
> > +		return -ENOMEM;
> 
> using devm_ here is pointless, the objects are not tied to the lifetime of the
> device (there can be created multiple times) and you have to unregister the
> netdevs manually, anyway.
Will fix it next version.
Geetha sowjanya May 13, 2024, 10:38 a.m. UTC | #4 
> -----Original Message-----
> From: Simon Horman <horms@kernel.org>
> Sent: Saturday, May 11, 2024 7:41 PM
> To: Geethasowjanya Akula <gakula@marvell.com>
> Cc: netdev@vger.kernel.org; linux-kernel@vger.kernel.org; kuba@kernel.org;
> davem@davemloft.net; pabeni@redhat.com; edumazet@google.com; Sunil
> Kovvuri Goutham <sgoutham@marvell.com>; Subbaraya Sundeep Bhatta
> <sbhatta@marvell.com>; Hariprasad Kelam <hkelam@marvell.com>
> Subject: [EXTERNAL] Re: [net-next PATCH v4 03/10] octeontx2-pf: Create
> representor netdev
> 
> ----------------------------------------------------------------------
> On Tue, May 07, 2024 at 10:09:14PM +0530, Geetha sowjanya wrote:
> > Adds initial devlink support to set/get the switchdev mode.
> > Representor netdevs are created for each rvu devices when the switch
> > mode is set to 'switchdev'. These netdevs are be used to control and
> > configure VFs.
> >
> > Signed-off-by: Geetha sowjanya <gakula@marvell.com>
> 
> ...
> 
> > diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/rep.c
> > b/drivers/net/ethernet/marvell/octeontx2/nic/rep.c
> > index 33ebbcb223e1..ff4318f414f8 100644
> > --- a/drivers/net/ethernet/marvell/octeontx2/nic/rep.c
> > +++ b/drivers/net/ethernet/marvell/octeontx2/nic/rep.c
> > @@ -28,6 +28,157 @@ MODULE_DESCRIPTION(DRV_STRING);
> > MODULE_LICENSE("GPL");  MODULE_DEVICE_TABLE(pci, rvu_rep_id_table);
> >
> > +static int rvu_rep_napi_init(struct otx2_nic *priv, struct
> > +netlink_ext_ack *extack) {
> > +	struct otx2_cq_poll *cq_poll = NULL;
> > +	struct otx2_qset *qset = &priv->qset;
> > +	struct otx2_hw *hw = &priv->hw;
> > +	int err = 0, qidx, vec;
> > +	char *irq_name;
> 
> Please consider using reverse xmas tree - longest line to shortest - for local
> variable declarations in new Networking code.
Will fix it in next version.
> 
> This tool can be helpful: https://urldefense.proofpoint.com/v2/url?u=https-
> 3A__github.com_ecree-
> 2Dsolarflare_xmastree&d=DwIBAg&c=nKjWec2b6R0mOyPaz7xtfQ&r=UiEt_nU
> eYFctu7JVLXVlXDhTmq_EAfooaZEYInfGuEQ&m=Mq4aRWpUpar1zTktQDlrt8Jl6
> 8BXQjkee8RpXExMCFcKMalirC_mVOYEGA0fcuSf&s=Kg1fSyZvUeZAO0TSWVB5
> A1GPqngBfG82Tx1Dz46ZH8c&e=
> 
> ...
> 
> > +int rvu_rep_create(struct otx2_nic *priv, struct netlink_ext_ack
> > +*extack) {
> > +	int rep_cnt = priv->rep_cnt;
> > +	struct net_device *ndev;
> > +	struct rep_dev *rep;
> > +	int rep_id, err;
> > +	u16 pcifunc;
> > +
> > +	priv->reps = devm_kcalloc(priv->dev, rep_cnt, sizeof(struct rep_dev *),
> > +				  GFP_KERNEL);
> > +	if (!priv->reps)
> > +		return -ENOMEM;
> > +
> > +	for (rep_id = 0; rep_id < rep_cnt; rep_id++) {
> > +		ndev = alloc_etherdev(sizeof(*rep));
> > +		if (!ndev) {
> > +			NL_SET_ERR_MSG_FMT_MOD(extack, "PFVF
> representor:%d
> > +					       creation failed", rep_id);
> 
> gcc-13 seems unhappy with a string spanning multiple lines.
> I suggest living with a line longer than 80 columns in this case.
> Maybe:
> 
> 			NL_SET_ERR_MSG_FMT_MOD(extack,
> 					       "PFVF representor:%d creation
> failed",
> 					       rep_id);
> 
> > +			err = -ENOMEM;
> > +			goto exit;
> > +		}
> 
Thanks for the feedback. Will submit next version with the suggested changes.
> ...
diff mbox series

Patch

diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_devlink.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_devlink.c
index 99ddf31269d9..5d577b671686 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_devlink.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_devlink.c
@@ -77,7 +77,56 @@  static const struct devlink_param otx2_dl_params[] = {
 			     otx2_dl_mcam_count_validate),
 };
 
+#ifdef CONFIG_RVU_ESWITCH
+static int otx2_devlink_eswitch_mode_get(struct devlink *devlink, u16 *mode)
+{
+	struct otx2_devlink *otx2_dl = devlink_priv(devlink);
+	struct otx2_nic *pfvf = otx2_dl->pfvf;
+
+	if (!otx2_rep_dev(pfvf->pdev))
+		return -EOPNOTSUPP;
+
+	*mode = pfvf->esw_mode;
+
+	return 0;
+}
+
+static int otx2_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode,
+					 struct netlink_ext_ack *extack)
+{
+	struct otx2_devlink *otx2_dl = devlink_priv(devlink);
+	struct otx2_nic *pfvf = otx2_dl->pfvf;
+	int ret = 0;
+
+	if (!otx2_rep_dev(pfvf->pdev))
+		return -EOPNOTSUPP;
+
+	if (pfvf->esw_mode == mode)
+		return 0;
+
+	switch (mode) {
+	case DEVLINK_ESWITCH_MODE_LEGACY:
+		rvu_rep_destroy(pfvf);
+		break;
+	case DEVLINK_ESWITCH_MODE_SWITCHDEV:
+		ret = rvu_rep_create(pfvf, extack);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (!ret)
+		pfvf->esw_mode = mode;
+
+	return ret;
+}
+#endif
+
 static const struct devlink_ops otx2_devlink_ops = {
+#ifdef CONFIG_RVU_ESWITCH
+	.eswitch_mode_get = otx2_devlink_eswitch_mode_get,
+	.eswitch_mode_set = otx2_devlink_eswitch_mode_set,
+#endif
 };
 
 int otx2_register_dl(struct otx2_nic *pfvf)
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/rep.c b/drivers/net/ethernet/marvell/octeontx2/nic/rep.c
index 33ebbcb223e1..ff4318f414f8 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/rep.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/rep.c
@@ -28,6 +28,157 @@  MODULE_DESCRIPTION(DRV_STRING);
 MODULE_LICENSE("GPL");
 MODULE_DEVICE_TABLE(pci, rvu_rep_id_table);
 
+static int rvu_rep_napi_init(struct otx2_nic *priv, struct netlink_ext_ack *extack)
+{
+	struct otx2_cq_poll *cq_poll = NULL;
+	struct otx2_qset *qset = &priv->qset;
+	struct otx2_hw *hw = &priv->hw;
+	int err = 0, qidx, vec;
+	char *irq_name;
+
+	qset->napi = kcalloc(hw->cint_cnt, sizeof(*cq_poll), GFP_KERNEL);
+	if (!qset->napi)
+		return -ENOMEM;
+
+	/* Register NAPI handler */
+	for (qidx = 0; qidx < hw->cint_cnt; qidx++) {
+		cq_poll = &qset->napi[qidx];
+		cq_poll->cint_idx = qidx;
+		cq_poll->cq_ids[CQ_RX] =
+			(qidx <  hw->rx_queues) ? qidx : CINT_INVALID_CQ;
+		cq_poll->cq_ids[CQ_TX] = (qidx < hw->tx_queues) ?
+					  qidx + hw->rx_queues : CINT_INVALID_CQ;
+		cq_poll->cq_ids[CQ_XDP] = CINT_INVALID_CQ;
+		cq_poll->cq_ids[CQ_QOS] = CINT_INVALID_CQ;
+
+		cq_poll->dev = (void *)priv;
+		netif_napi_add(priv->reps[qidx]->netdev, &cq_poll->napi,
+			       otx2_napi_handler);
+		napi_enable(&cq_poll->napi);
+	}
+	/* Register CQ IRQ handlers */
+	vec = hw->nix_msixoff + NIX_LF_CINT_VEC_START;
+	for (qidx = 0; qidx < hw->cint_cnt; qidx++) {
+		irq_name = &hw->irq_name[vec * NAME_SIZE];
+
+		snprintf(irq_name, NAME_SIZE, "rep%d-rxtx-%d", qidx, qidx);
+
+		err = request_irq(pci_irq_vector(priv->pdev, vec),
+				  otx2_cq_intr_handler, 0, irq_name,
+				  &qset->napi[qidx]);
+		if (err) {
+			NL_SET_ERR_MSG_FMT_MOD(extack,
+					       "RVU REP IRQ registration failed for CQ%d",
+						qidx);
+			goto err_free_cints;
+		}
+		vec++;
+
+		/* Enable CQ IRQ */
+		otx2_write64(priv, NIX_LF_CINTX_INT(qidx), BIT_ULL(0));
+		otx2_write64(priv, NIX_LF_CINTX_ENA_W1S(qidx), BIT_ULL(0));
+	}
+	priv->flags &= ~OTX2_FLAG_INTF_DOWN;
+	return 0;
+
+err_free_cints:
+	otx2_free_cints(priv, qidx);
+	otx2_disable_napi(priv);
+	return err;
+}
+
+static void rvu_rep_free_cq_rsrc(struct otx2_nic *priv)
+{
+	struct otx2_cq_poll *cq_poll = NULL;
+	struct otx2_qset *qset = &priv->qset;
+	int qidx, vec;
+
+	/* Cleanup CQ NAPI and IRQ */
+	vec = priv->hw.nix_msixoff + NIX_LF_CINT_VEC_START;
+	for (qidx = 0; qidx < priv->hw.cint_cnt; qidx++) {
+		/* Disable interrupt */
+		otx2_write64(priv, NIX_LF_CINTX_ENA_W1C(qidx), BIT_ULL(0));
+
+		synchronize_irq(pci_irq_vector(priv->pdev, vec));
+
+		cq_poll = &qset->napi[qidx];
+		napi_synchronize(&cq_poll->napi);
+		vec++;
+	}
+	otx2_free_cints(priv, priv->hw.cint_cnt);
+	otx2_disable_napi(priv);
+}
+
+void rvu_rep_destroy(struct otx2_nic *priv)
+{
+	struct rep_dev *rep;
+	int rep_id;
+
+	rvu_rep_free_cq_rsrc(priv);
+	for (rep_id = 0; rep_id < priv->rep_cnt; rep_id++) {
+		rep = priv->reps[rep_id];
+		unregister_netdev(rep->netdev);
+		free_netdev(rep->netdev);
+	}
+}
+
+int rvu_rep_create(struct otx2_nic *priv, struct netlink_ext_ack *extack)
+{
+	int rep_cnt = priv->rep_cnt;
+	struct net_device *ndev;
+	struct rep_dev *rep;
+	int rep_id, err;
+	u16 pcifunc;
+
+	priv->reps = devm_kcalloc(priv->dev, rep_cnt, sizeof(struct rep_dev *),
+				  GFP_KERNEL);
+	if (!priv->reps)
+		return -ENOMEM;
+
+	for (rep_id = 0; rep_id < rep_cnt; rep_id++) {
+		ndev = alloc_etherdev(sizeof(*rep));
+		if (!ndev) {
+			NL_SET_ERR_MSG_FMT_MOD(extack, "PFVF representor:%d
+					       creation failed", rep_id);
+			err = -ENOMEM;
+			goto exit;
+		}
+
+		rep = netdev_priv(ndev);
+		priv->reps[rep_id] = rep;
+		rep->mdev = priv;
+		rep->netdev = ndev;
+		rep->rep_id = rep_id;
+
+		ndev->min_mtu = OTX2_MIN_MTU;
+		ndev->max_mtu = priv->hw.max_mtu;
+		pcifunc = priv->rep_pf_map[rep_id];
+		rep->pcifunc = pcifunc;
+
+		snprintf(ndev->name, sizeof(ndev->name), "r%dp%d", rep_id,
+			 rvu_get_pf(pcifunc));
+
+		eth_hw_addr_random(ndev);
+		err = register_netdev(ndev);
+		if (err) {
+			NL_SET_ERR_MSG_MOD(extack, "PFVF reprentator registration failed");
+			goto exit;
+		}
+	}
+	err = rvu_rep_napi_init(priv, extack);
+	if (err)
+		goto exit;
+
+	return 0;
+exit:
+	while (--rep_id >= 0) {
+		rep = priv->reps[rep_id];
+		unregister_netdev(rep->netdev);
+		free_netdev(rep->netdev);
+	}
+	return err;
+}
+
 static int rvu_rep_rsrc_free(struct otx2_nic *priv)
 {
 	struct otx2_qset *qset = &priv->qset;
@@ -165,6 +316,10 @@  static int rvu_rep_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	if (err)
 		goto err_detach_rsrc;
 
+	err = otx2_register_dl(priv);
+	if (err)
+		goto err_detach_rsrc;
+
 	return 0;
 
 err_detach_rsrc:
@@ -186,6 +341,8 @@  static void rvu_rep_remove(struct pci_dev *pdev)
 {
 	struct otx2_nic *priv = pci_get_drvdata(pdev);
 
+	otx2_unregister_dl(priv);
+	rvu_rep_destroy(priv);
 	rvu_rep_rsrc_free(priv);
 	otx2_detach_resources(&priv->mbox);
 	if (priv->hw.lmt_info)
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/rep.h b/drivers/net/ethernet/marvell/octeontx2/nic/rep.h
index 9b3734146dd1..c04874c4d4c6 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/rep.h
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/rep.h
@@ -29,4 +29,6 @@  static inline bool otx2_rep_dev(struct pci_dev *pdev)
 	return pdev->device == PCI_DEVID_RVU_REP;
 }
 
+int rvu_rep_create(struct otx2_nic *priv, struct netlink_ext_ack *extack);
+void rvu_rep_destroy(struct otx2_nic *priv);
 #endif /* REP_H */