[pull request][net 0/7] mlx5 fixes 2023-03-21

[pull request][net 0/7] mlx5 fixes 2023-03-21

[Saeed Mahameed]

From: Saeed Mahameed <saeedm@nvidia.com>

This series provides bug fixes to mlx5 driver.
Please pull and let me know if there is any problem.

Conflict notice:
when merged into net-next, this series will cause a conflict in file:
drivers/net/ethernet/mellanox/mlx5/core/en_tc.

to resolve just to DON'T take any changes to the missing function 
mlx5e_hairpin_params_init() inside that file, that function doesn't
exist there anymore, we will submit a separate patch to fix net-next.

Thanks,
Saeed.


The following changes since commit f038f3917baf04835ba2b7bcf2a04ac93fbf8a9c:

  octeontx2-vf: Add missing free for alloc_percpu (2023-03-20 22:00:19 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux.git tags/mlx5-fixes-2023-03-21

for you to fetch changes up to 640fcdbcf27fc62de9223f958ceb4e897a00e791:

  net/mlx5: E-Switch, Fix an Oops in error handling code (2023-03-21 14:06:32 -0700)

----------------------------------------------------------------
mlx5-fixes-2023-03-21

----------------------------------------------------------------
Dan Carpenter (1):
      net/mlx5: E-Switch, Fix an Oops in error handling code

Emeel Hakim (1):
      net/mlx5e: Overcome slow response for first macsec ASO WQE

Gavin Li (2):
      net/mlx5e: Set uplink rep as NETNS_LOCAL
      net/mlx5e: Block entering switchdev mode with ns inconsistency

Lama Kayal (1):
      net/mlx5: Fix steering rules cleanup

Maher Sanalla (1):
      net/mlx5: Read the TC mapping of all priorities on ETS query

Roy Novich (1):
      net/mlx5e: Initialize link speed to zero

 .../net/ethernet/mellanox/mlx5/core/en_accel/macsec.c |  9 ++++++++-
 drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c    |  6 ++++--
 drivers/net/ethernet/mellanox/mlx5/core/en_main.c     |  6 +++++-
 drivers/net/ethernet/mellanox/mlx5/core/en_tc.c       |  2 +-
 .../mellanox/mlx5/core/esw/acl/ingress_ofld.c         |  3 +--
 drivers/net/ethernet/mellanox/mlx5/core/eswitch.c     |  1 +
 .../ethernet/mellanox/mlx5/core/eswitch_offloads.c    | 19 +++++++++++++++++++
 7 files changed, 39 insertions(+), 7 deletions(-)

[net 1/7] net/mlx5e: Set uplink rep as NETNS_LOCAL

[Saeed Mahameed]

From: Gavin Li <gavinl@nvidia.com>

Previously, NETNS_LOCAL was not set for uplink representors, inconsistent
with VF representors, and allowed the uplink representor to be moved
between net namespaces and separated from the VF representors it shares
the core device with. Such usage would break the isolation model of
namespaces, as devices in different namespaces would have access to
shared memory.

To solve this issue, set NETNS_LOCAL for uplink representors if eswitch is
in switchdev mode.

Fixes: 7a9fb35e8c3a ("net/mlx5e: Do not reload ethernet ports when changing eswitch mode")
Signed-off-by: Gavin Li <gavinl@nvidia.com>
Reviewed-by: Gavi Teitz <gavi@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_main.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index a7f2ab22cc40..7ca7e9b57607 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -4150,8 +4150,12 @@ static netdev_features_t mlx5e_fix_features(struct net_device *netdev,
 		}
 	}
 
-	if (mlx5e_is_uplink_rep(priv))
+	if (mlx5e_is_uplink_rep(priv)) {
 		features = mlx5e_fix_uplink_rep_features(netdev, features);
+		features |= NETIF_F_NETNS_LOCAL;
+	} else {
+		features &= ~NETIF_F_NETNS_LOCAL;
+	}
 
 	mutex_unlock(&priv->state_lock);
 
-- 
2.39.2

[net 2/7] net/mlx5e: Block entering switchdev mode with ns inconsistency

[Saeed Mahameed]

From: Gavin Li <gavinl@nvidia.com>

Upon entering switchdev mode, VF/SF representors are spawned in the
devlink instance's net namespace, whereas the PF net device transforms
into the uplink representor, remaining in the net namespace the PF net
device was in. Therefore, if a PF net device's namespace is different from
its parent devlink net namespace, entering switchdev mode can create an
illegal situation where all representors sharing the same core device
are NOT in the same net namespace.

To avoid this issue, block entering switchdev mode for devices whose child
netdev net namespace has diverged from the parent devlink's.

Fixes: 7768d1971de6 ("net/mlx5: E-Switch, Add control for encapsulation")
Signed-off-by: Gavin Li <gavinl@nvidia.com>
Reviewed-by: Gavi Teitz <gavi@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
---
 .../mellanox/mlx5/core/eswitch_offloads.c     | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
index 22075943bb58..25a8076a77bf 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
@@ -3405,6 +3405,18 @@ static int esw_inline_mode_to_devlink(u8 mlx5_mode, u8 *mode)
 	return 0;
 }
 
+static bool esw_offloads_devlink_ns_eq_netdev_ns(struct devlink *devlink)
+{
+	struct net *devl_net, *netdev_net;
+	struct mlx5_eswitch *esw;
+
+	esw = mlx5_devlink_eswitch_get(devlink);
+	netdev_net = dev_net(esw->dev->mlx5e_res.uplink_netdev);
+	devl_net = devlink_net(devlink);
+
+	return net_eq(devl_net, netdev_net);
+}
+
 int mlx5_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode,
 				  struct netlink_ext_ack *extack)
 {
@@ -3419,6 +3431,13 @@ int mlx5_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode,
 	if (esw_mode_from_devlink(mode, &mlx5_mode))
 		return -EINVAL;
 
+	if (mode == DEVLINK_ESWITCH_MODE_SWITCHDEV &&
+	    !esw_offloads_devlink_ns_eq_netdev_ns(devlink)) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Can't change E-Switch mode to switchdev when netdev net namespace has diverged from the devlink's.");
+		return -EPERM;
+	}
+
 	mlx5_lag_disable_change(esw->dev);
 	err = mlx5_esw_try_lock(esw);
 	if (err < 0) {
-- 
2.39.2

[net 3/7] net/mlx5: Fix steering rules cleanup

[Saeed Mahameed]

From: Lama Kayal <lkayal@nvidia.com>

vport's mc, uc and multicast rules are not deleted in teardown path when
EEH happens. Since the vport's promisc settings(uc, mc and all) in
firmware are reset after EEH, mlx5 driver will try to delete the above
rules in the initialization path. This cause kernel crash because these
software rules are no longer valid.

Fix by nullifying these rules right after delete to avoid accessing any dangling
pointers.

Call Trace:
__list_del_entry_valid+0xcc/0x100 (unreliable)
tree_put_node+0xf4/0x1b0 [mlx5_core]
tree_remove_node+0x30/0x70 [mlx5_core]
mlx5_del_flow_rules+0x14c/0x1f0 [mlx5_core]
esw_apply_vport_rx_mode+0x10c/0x200 [mlx5_core]
esw_update_vport_rx_mode+0xb4/0x180 [mlx5_core]
esw_vport_change_handle_locked+0x1ec/0x230 [mlx5_core]
esw_enable_vport+0x130/0x260 [mlx5_core]
mlx5_eswitch_enable_sriov+0x2a0/0x2f0 [mlx5_core]
mlx5_device_enable_sriov+0x74/0x440 [mlx5_core]
mlx5_load_one+0x114c/0x1550 [mlx5_core]
mlx5_pci_resume+0x68/0xf0 [mlx5_core]
eeh_report_resume+0x1a4/0x230
eeh_pe_dev_traverse+0x98/0x170
eeh_handle_normal_event+0x3e4/0x640
eeh_handle_event+0x4c/0x370
eeh_event_handler+0x14c/0x210
kthread+0x168/0x1b0
ret_from_kernel_thread+0x5c/0x84

Fixes: a35f71f27a61 ("net/mlx5: E-Switch, Implement promiscuous rx modes vf request handling")
Signed-off-by: Huy Nguyen <huyn@mellanox.com>
Signed-off-by: Lama Kayal <lkayal@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/eswitch.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
index 0f052513fefa..8bdf28762f41 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
@@ -959,6 +959,7 @@ void mlx5_esw_vport_disable(struct mlx5_eswitch *esw, u16 vport_num)
 	 */
 	esw_vport_change_handle_locked(vport);
 	vport->enabled_events = 0;
+	esw_apply_vport_rx_mode(esw, vport, false, false);
 	esw_vport_cleanup(esw, vport);
 	esw->enabled_vports--;
 
-- 
2.39.2

[net 4/7] net/mlx5e: Initialize link speed to zero

[Saeed Mahameed]

From: Roy Novich <royno@nvidia.com>

mlx5e_port_max_linkspeed does not guarantee value assignment for speed.
Avoid cases where link_speed might be used uninitialized. In case
mlx5e_port_max_linkspeed fails, a default link speed of 50000 will be
used for the calculations.

Fixes: 3f6d08d196b2 ("net/mlx5e: Add RSS support for hairpin")
Signed-off-by: Roy Novich <royno@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Aya Levin <ayal@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_tc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
index 6bfed633343a..87a2850b32d0 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -1103,8 +1103,8 @@ static void
 mlx5e_hairpin_params_init(struct mlx5e_hairpin_params *hairpin_params,
 			  struct mlx5_core_dev *mdev)
 {
+	u32 link_speed = 0;
 	u64 link_speed64;
-	u32 link_speed;
 
 	hairpin_params->mdev = mdev;
 	/* set hairpin pair per each 50Gbs share of the link */
-- 
2.39.2

[net 5/7] net/mlx5e: Overcome slow response for first macsec ASO WQE

[Saeed Mahameed]

From: Emeel Hakim <ehakim@nvidia.com>

First ASO WQE poll causes a cache miss in hardware hence the resut is
delayed. It causes to the situation where such WQE is polled earlier
than it is needed.

Add logic to retry ASO CQ polling operation.

Fixes: 739cfa34518e ("net/mlx5: Make ASO poll CQ usable in atomic context") 
Signed-off-by: Emeel Hakim <ehakim@nvidia.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Reviewed-by: Raed Salem <raeds@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
---
 .../net/ethernet/mellanox/mlx5/core/en_accel/macsec.c    | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c
index 8af53178e40d..33b3620ea45c 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c
@@ -1412,6 +1412,7 @@ static int macsec_aso_query(struct mlx5_core_dev *mdev, struct mlx5e_macsec *mac
 	struct mlx5e_macsec_aso *aso;
 	struct mlx5_aso_wqe *aso_wqe;
 	struct mlx5_aso *maso;
+	unsigned long expires;
 	int err;
 
 	aso = &macsec->aso;
@@ -1425,7 +1426,13 @@ static int macsec_aso_query(struct mlx5_core_dev *mdev, struct mlx5e_macsec *mac
 	macsec_aso_build_wqe_ctrl_seg(aso, &aso_wqe->aso_ctrl, NULL);
 
 	mlx5_aso_post_wqe(maso, false, &aso_wqe->ctrl);
-	err = mlx5_aso_poll_cq(maso, false);
+	expires = jiffies + msecs_to_jiffies(10);
+	do {
+		err = mlx5_aso_poll_cq(maso, false);
+		if (err)
+			usleep_range(2, 10);
+	} while (err && time_is_after_jiffies(expires));
+
 	if (err)
 		goto err_out;
 
-- 
2.39.2

[net 6/7] net/mlx5: Read the TC mapping of all priorities on ETS query

[Saeed Mahameed]

From: Maher Sanalla <msanalla@nvidia.com>

When ETS configurations are queried by the user to get the mapping
assignment between packet priority and traffic class, only priorities up
to maximum TCs are queried from QTCT register in FW to retrieve their
assigned TC, leaving the rest of the priorities mapped to the default
TC #0 which might be misleading.

Fix by querying the TC mapping of all priorities on each ETS query,
regardless of the maximum number of TCs configured in FW.

Fixes: 820c2c5e773d ("net/mlx5e: Read ETS settings directly from firmware")
Signed-off-by: Maher Sanalla <msanalla@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c b/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
index 2449731b7d79..89de92d06483 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
@@ -117,12 +117,14 @@ static int mlx5e_dcbnl_ieee_getets(struct net_device *netdev,
 	if (!MLX5_CAP_GEN(priv->mdev, ets))
 		return -EOPNOTSUPP;
 
-	ets->ets_cap = mlx5_max_tc(priv->mdev) + 1;
-	for (i = 0; i < ets->ets_cap; i++) {
+	for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
 		err = mlx5_query_port_prio_tc(mdev, i, &ets->prio_tc[i]);
 		if (err)
 			return err;
+	}
 
+	ets->ets_cap = mlx5_max_tc(priv->mdev) + 1;
+	for (i = 0; i < ets->ets_cap; i++) {
 		err = mlx5_query_port_tc_group(mdev, i, &tc_group[i]);
 		if (err)
 			return err;
-- 
2.39.2

[net 7/7] net/mlx5: E-Switch, Fix an Oops in error handling code

[Saeed Mahameed]

From: Dan Carpenter <error27@gmail.com>

The error handling dereferences "vport".  There is nothing we can do if
it is an error pointer except returning the error code.

Fixes: 133dcfc577ea ("net/mlx5: E-Switch, Alloc and free unique metadata for match")
Signed-off-by: Dan Carpenter <error27@gmail.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/esw/acl/ingress_ofld.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/esw/acl/ingress_ofld.c b/drivers/net/ethernet/mellanox/mlx5/core/esw/acl/ingress_ofld.c
index d55775627a47..50d2ea323979 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/esw/acl/ingress_ofld.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/esw/acl/ingress_ofld.c
@@ -364,8 +364,7 @@ int mlx5_esw_acl_ingress_vport_metadata_update(struct mlx5_eswitch *esw, u16 vpo
 
 	if (WARN_ON_ONCE(IS_ERR(vport))) {
 		esw_warn(esw->dev, "vport(%d) invalid!\n", vport_num);
-		err = PTR_ERR(vport);
-		goto out;
+		return PTR_ERR(vport);
 	}
 
 	esw_acl_ingress_ofld_rules_destroy(esw, vport);
-- 
2.39.2

Re: [net 1/7] net/mlx5e: Set uplink rep as NETNS_LOCAL

[patchwork-bot+netdevbpf]

Hello:

This series was applied to netdev/net.git (main)
by Saeed Mahameed <saeedm@nvidia.com>:

On Tue, 21 Mar 2023 14:11:29 -0700 you wrote:
> From: Gavin Li <gavinl@nvidia.com>
> 
> Previously, NETNS_LOCAL was not set for uplink representors, inconsistent
> with VF representors, and allowed the uplink representor to be moved
> between net namespaces and separated from the VF representors it shares
> the core device with. Such usage would break the isolation model of
> namespaces, as devices in different namespaces would have access to
> shared memory.
> 
> [...]

Here is the summary with links:
  - [net,1/7] net/mlx5e: Set uplink rep as NETNS_LOCAL
    https://git.kernel.org/netdev/net/c/c83172b0639c
  - [net,2/7] net/mlx5e: Block entering switchdev mode with ns inconsistency
    https://git.kernel.org/netdev/net/c/662404b24a4c
  - [net,3/7] net/mlx5: Fix steering rules cleanup
    https://git.kernel.org/netdev/net/c/922f56e9a795
  - [net,4/7] net/mlx5e: Initialize link speed to zero
    https://git.kernel.org/netdev/net/c/6e9d51b1a5cb
  - [net,5/7] net/mlx5e: Overcome slow response for first macsec ASO WQE
    https://git.kernel.org/netdev/net/c/7e3fce82d945
  - [net,6/7] net/mlx5: Read the TC mapping of all priorities on ETS query
    https://git.kernel.org/netdev/net/c/44d553188c38
  - [net,7/7] net/mlx5: E-Switch, Fix an Oops in error handling code
    https://git.kernel.org/netdev/net/c/640fcdbcf27f

You are awesome, thank you!
-- 
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