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Message-Id: <20181011012444.28194-8-saeedm@mellanox.com>
Date: Wed, 10 Oct 2018 18:24:44 -0700
From: Saeed Mahameed <saeedm@...lanox.com>
To: "David S. Miller" <davem@...emloft.net>
Cc: netdev@...r.kernel.org, Jason Gunthorpe <jgg@...lanox.com>,
linux-rdma@...r.kernel.org, Feras Daoud <ferasda@...lanox.com>,
Saeed Mahameed <saeedm@...lanox.com>
Subject: [net-next 7/7] net/mlx5e: Do not ignore netdevice TX/RX queues number
From: Feras Daoud <ferasda@...lanox.com>
The current design of mlx5e driver ignores the netdevice TX/RX queues
number for netdevices that RDMA IPoIB ULP creates. Instead, the queue
number is initialized to the maximum number that mlx5 thinks best for
performance. As a result, ULP drivers that choose to create a netdevice
with queue number that is less than the maximum channels mlx5 creates,
will get a memory corruption.
This fix changes the mlx5e netdev logic to respect ULP netdevices TX/RX
queue number and use it when creating resources instead of the maximum
channel number.
Fixes: cd565b4b51e5 ("IB/IPoIB: Support acceleration options callbacks")
Signed-off-by: Feras Daoud <ferasda@...lanox.com>
Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
---
drivers/net/ethernet/mellanox/mlx5/core/en.h | 11 ++++++--
.../ethernet/mellanox/mlx5/core/en_ethtool.c | 2 +-
.../net/ethernet/mellanox/mlx5/core/en_main.c | 25 ++++++++++---------
.../net/ethernet/mellanox/mlx5/core/en_rep.c | 9 ++++---
.../ethernet/mellanox/mlx5/core/en_stats.c | 8 +++---
.../ethernet/mellanox/mlx5/core/ipoib/ipoib.c | 9 ++++---
.../mellanox/mlx5/core/ipoib/ipoib_vlan.c | 1 -
7 files changed, 37 insertions(+), 28 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en.h b/drivers/net/ethernet/mellanox/mlx5/core/en.h
index 0fbdd7696ec4..d7fbd5b6ac95 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en.h
@@ -173,6 +173,7 @@ static inline u16 mlx5_min_rx_wqes(int wq_type, u32 wq_size)
}
}
+/* Use this function to get max num channels (rxqs/txqs) only to create netdev */
static inline int mlx5e_get_max_num_channels(struct mlx5_core_dev *mdev)
{
return is_kdump_kernel() ?
@@ -181,6 +182,13 @@ static inline int mlx5e_get_max_num_channels(struct mlx5_core_dev *mdev)
MLX5E_MAX_NUM_CHANNELS);
}
+/* Use this function to get max num channels after netdev was created */
+static inline int mlx5e_get_netdev_max_channels(struct net_device *netdev)
+{
+ return min_t(unsigned int, netdev->num_rx_queues,
+ netdev->num_tx_queues);
+}
+
struct mlx5e_tx_wqe {
struct mlx5_wqe_ctrl_seg ctrl;
struct mlx5_wqe_eth_seg eth;
@@ -710,7 +718,6 @@ struct mlx5e_profile {
void (*disable)(struct mlx5e_priv *priv);
void (*update_stats)(struct mlx5e_priv *priv);
void (*update_carrier)(struct mlx5e_priv *priv);
- int (*max_nch)(struct mlx5_core_dev *mdev);
struct {
mlx5e_fp_handle_rx_cqe handle_rx_cqe;
mlx5e_fp_handle_rx_cqe handle_rx_cqe_mpwqe;
@@ -970,7 +977,7 @@ int mlx5e_netdev_init(struct net_device *netdev,
void mlx5e_netdev_cleanup(struct net_device *netdev, struct mlx5e_priv *priv);
struct net_device*
mlx5e_create_netdev(struct mlx5_core_dev *mdev, const struct mlx5e_profile *profile,
- void *ppriv);
+ int nch, void *ppriv);
int mlx5e_attach_netdev(struct mlx5e_priv *priv);
void mlx5e_detach_netdev(struct mlx5e_priv *priv);
void mlx5e_destroy_netdev(struct mlx5e_priv *priv);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
index c86fd770c463..c61f6302cde2 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
@@ -319,7 +319,7 @@ static int mlx5e_set_ringparam(struct net_device *dev,
void mlx5e_ethtool_get_channels(struct mlx5e_priv *priv,
struct ethtool_channels *ch)
{
- ch->max_combined = priv->profile->max_nch(priv->mdev);
+ ch->max_combined = mlx5e_get_netdev_max_channels(priv->netdev);
ch->combined_count = priv->channels.params.num_channels;
}
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index f4b11bdae879..c9848e333450 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -1799,7 +1799,7 @@ static int mlx5e_open_sqs(struct mlx5e_channel *c,
struct mlx5e_channel_param *cparam)
{
struct mlx5e_priv *priv = c->priv;
- int err, tc, max_nch = priv->profile->max_nch(priv->mdev);
+ int err, tc, max_nch = mlx5e_get_netdev_max_channels(priv->netdev);
for (tc = 0; tc < params->num_tc; tc++) {
int txq_ix = c->ix + tc * max_nch;
@@ -2439,7 +2439,7 @@ int mlx5e_create_direct_rqts(struct mlx5e_priv *priv)
int err;
int ix;
- for (ix = 0; ix < priv->profile->max_nch(priv->mdev); ix++) {
+ for (ix = 0; ix < mlx5e_get_netdev_max_channels(priv->netdev); ix++) {
rqt = &priv->direct_tir[ix].rqt;
err = mlx5e_create_rqt(priv, 1 /*size */, rqt);
if (err)
@@ -2460,7 +2460,7 @@ void mlx5e_destroy_direct_rqts(struct mlx5e_priv *priv)
{
int i;
- for (i = 0; i < priv->profile->max_nch(priv->mdev); i++)
+ for (i = 0; i < mlx5e_get_netdev_max_channels(priv->netdev); i++)
mlx5e_destroy_rqt(priv, &priv->direct_tir[i].rqt);
}
@@ -2554,7 +2554,7 @@ static void mlx5e_redirect_rqts(struct mlx5e_priv *priv,
mlx5e_redirect_rqt(priv, rqtn, MLX5E_INDIR_RQT_SIZE, rrp);
}
- for (ix = 0; ix < priv->profile->max_nch(priv->mdev); ix++) {
+ for (ix = 0; ix < mlx5e_get_netdev_max_channels(priv->netdev); ix++) {
struct mlx5e_redirect_rqt_param direct_rrp = {
.is_rss = false,
{
@@ -2755,7 +2755,7 @@ static int mlx5e_modify_tirs_lro(struct mlx5e_priv *priv)
goto free_in;
}
- for (ix = 0; ix < priv->profile->max_nch(priv->mdev); ix++) {
+ for (ix = 0; ix < mlx5e_get_netdev_max_channels(priv->netdev); ix++) {
err = mlx5_core_modify_tir(mdev, priv->direct_tir[ix].tirn,
in, inlen);
if (err)
@@ -2855,7 +2855,7 @@ static void mlx5e_netdev_set_tcs(struct net_device *netdev)
static void mlx5e_build_tc2txq_maps(struct mlx5e_priv *priv)
{
- int max_nch = priv->profile->max_nch(priv->mdev);
+ int max_nch = mlx5e_get_netdev_max_channels(priv->netdev);
int i, tc;
for (i = 0; i < max_nch; i++)
@@ -3247,7 +3247,7 @@ int mlx5e_create_indirect_tirs(struct mlx5e_priv *priv, bool inner_ttc)
int mlx5e_create_direct_tirs(struct mlx5e_priv *priv)
{
- int nch = priv->profile->max_nch(priv->mdev);
+ int nch = mlx5e_get_netdev_max_channels(priv->netdev);
struct mlx5e_tir *tir;
void *tirc;
int inlen;
@@ -3300,7 +3300,7 @@ void mlx5e_destroy_indirect_tirs(struct mlx5e_priv *priv, bool inner_ttc)
void mlx5e_destroy_direct_tirs(struct mlx5e_priv *priv)
{
- int nch = priv->profile->max_nch(priv->mdev);
+ int nch = mlx5e_get_netdev_max_channels(priv->netdev);
int i;
for (i = 0; i < nch; i++)
@@ -4743,7 +4743,7 @@ static int mlx5e_nic_init(struct mlx5_core_dev *mdev,
return err;
mlx5e_build_nic_params(mdev, &priv->channels.params,
- profile->max_nch(mdev), netdev->mtu);
+ mlx5e_get_netdev_max_channels(netdev), netdev->mtu);
mlx5e_timestamp_init(priv);
@@ -4926,7 +4926,6 @@ static const struct mlx5e_profile mlx5e_nic_profile = {
.enable = mlx5e_nic_enable,
.disable = mlx5e_nic_disable,
.update_stats = mlx5e_update_ndo_stats,
- .max_nch = mlx5e_get_max_num_channels,
.update_carrier = mlx5e_update_carrier,
.rx_handlers.handle_rx_cqe = mlx5e_handle_rx_cqe,
.rx_handlers.handle_rx_cqe_mpwqe = mlx5e_handle_rx_cqe_mpwrq,
@@ -4977,9 +4976,9 @@ void mlx5e_netdev_cleanup(struct net_device *netdev, struct mlx5e_priv *priv)
struct net_device *mlx5e_create_netdev(struct mlx5_core_dev *mdev,
const struct mlx5e_profile *profile,
+ int nch,
void *ppriv)
{
- int nch = profile->max_nch(mdev);
struct net_device *netdev;
int err;
@@ -5101,6 +5100,7 @@ static void *mlx5e_add(struct mlx5_core_dev *mdev)
void *rpriv = NULL;
void *priv;
int err;
+ int nch;
err = mlx5e_check_required_hca_cap(mdev);
if (err)
@@ -5116,7 +5116,8 @@ static void *mlx5e_add(struct mlx5_core_dev *mdev)
}
#endif
- netdev = mlx5e_create_netdev(mdev, &mlx5e_nic_profile, rpriv);
+ nch = mlx5e_get_max_num_channels(mdev);
+ netdev = mlx5e_create_netdev(mdev, &mlx5e_nic_profile, nch, rpriv);
if (!netdev) {
mlx5_core_err(mdev, "mlx5e_create_netdev failed\n");
goto err_free_rpriv;
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
index 1846edb01fd6..64c2b9ea8b1e 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
@@ -1090,7 +1090,8 @@ static int mlx5e_init_rep(struct mlx5_core_dev *mdev,
return err;
- priv->channels.params.num_channels = profile->max_nch(mdev);
+ priv->channels.params.num_channels =
+ mlx5e_get_netdev_max_channels(netdev);
mlx5e_build_rep_params(mdev, &priv->channels.params, netdev->mtu);
mlx5e_build_rep_netdev(netdev);
@@ -1233,7 +1234,6 @@ static const struct mlx5e_profile mlx5e_rep_profile = {
.init_tx = mlx5e_init_rep_tx,
.cleanup_tx = mlx5e_cleanup_nic_tx,
.update_stats = mlx5e_rep_update_hw_counters,
- .max_nch = mlx5e_get_max_num_channels,
.update_carrier = NULL,
.rx_handlers.handle_rx_cqe = mlx5e_handle_rx_cqe_rep,
.rx_handlers.handle_rx_cqe_mpwqe = mlx5e_handle_rx_cqe_mpwrq,
@@ -1296,13 +1296,14 @@ mlx5e_vport_rep_load(struct mlx5_core_dev *dev, struct mlx5_eswitch_rep *rep)
struct mlx5e_rep_priv *rpriv;
struct net_device *netdev;
struct mlx5e_priv *upriv;
- int err;
+ int nch, err;
rpriv = kzalloc(sizeof(*rpriv), GFP_KERNEL);
if (!rpriv)
return -ENOMEM;
- netdev = mlx5e_create_netdev(dev, &mlx5e_rep_profile, rpriv);
+ nch = mlx5e_get_max_num_channels(dev);
+ netdev = mlx5e_create_netdev(dev, &mlx5e_rep_profile, nch, rpriv);
if (!netdev) {
pr_warn("Failed to create representor netdev for vport %d\n",
rep->vport);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c b/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c
index b7d4896c7c7b..1c006869a642 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c
@@ -133,7 +133,7 @@ void mlx5e_grp_sw_update_stats(struct mlx5e_priv *priv)
memset(s, 0, sizeof(*s));
- for (i = 0; i < priv->profile->max_nch(priv->mdev); i++) {
+ for (i = 0; i < mlx5e_get_netdev_max_channels(priv->netdev); i++) {
struct mlx5e_channel_stats *channel_stats =
&priv->channel_stats[i];
struct mlx5e_xdpsq_stats *xdpsq_red_stats = &channel_stats->xdpsq;
@@ -1217,7 +1217,7 @@ static const struct counter_desc ch_stats_desc[] = {
static int mlx5e_grp_channels_get_num_stats(struct mlx5e_priv *priv)
{
- int max_nch = priv->profile->max_nch(priv->mdev);
+ int max_nch = mlx5e_get_netdev_max_channels(priv->netdev);
return (NUM_RQ_STATS * max_nch) +
(NUM_CH_STATS * max_nch) +
@@ -1229,7 +1229,7 @@ static int mlx5e_grp_channels_get_num_stats(struct mlx5e_priv *priv)
static int mlx5e_grp_channels_fill_strings(struct mlx5e_priv *priv, u8 *data,
int idx)
{
- int max_nch = priv->profile->max_nch(priv->mdev);
+ int max_nch = mlx5e_get_netdev_max_channels(priv->netdev);
int i, j, tc;
for (i = 0; i < max_nch; i++)
@@ -1264,7 +1264,7 @@ static int mlx5e_grp_channels_fill_strings(struct mlx5e_priv *priv, u8 *data,
static int mlx5e_grp_channels_fill_stats(struct mlx5e_priv *priv, u64 *data,
int idx)
{
- int max_nch = priv->profile->max_nch(priv->mdev);
+ int max_nch = mlx5e_get_netdev_max_channels(priv->netdev);
int i, j, tc;
for (i = 0; i < max_nch; i++)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib.c b/drivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib.c
index ed28602c98f6..b59953daf8b4 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib.c
@@ -88,7 +88,8 @@ int mlx5i_init(struct mlx5_core_dev *mdev,
netdev->mtu = max_mtu;
mlx5e_build_nic_params(mdev, &priv->channels.params,
- profile->max_nch(mdev), netdev->mtu);
+ mlx5e_get_netdev_max_channels(netdev),
+ netdev->mtu);
mlx5i_build_nic_params(mdev, &priv->channels.params);
mlx5e_timestamp_init(priv);
@@ -117,10 +118,11 @@ void mlx5i_cleanup(struct mlx5e_priv *priv)
static void mlx5i_grp_sw_update_stats(struct mlx5e_priv *priv)
{
+ int max_nch = mlx5e_get_netdev_max_channels(priv->netdev);
struct mlx5e_sw_stats s = { 0 };
int i, j;
- for (i = 0; i < priv->profile->max_nch(priv->mdev); i++) {
+ for (i = 0; i < max_nch; i++) {
struct mlx5e_channel_stats *channel_stats;
struct mlx5e_rq_stats *rq_stats;
@@ -417,7 +419,6 @@ static const struct mlx5e_profile mlx5i_nic_profile = {
.enable = NULL, /* mlx5i_enable */
.disable = NULL, /* mlx5i_disable */
.update_stats = NULL, /* mlx5i_update_stats */
- .max_nch = mlx5e_get_max_num_channels,
.update_carrier = NULL, /* no HW update in IB link */
.rx_handlers.handle_rx_cqe = mlx5i_handle_rx_cqe,
.rx_handlers.handle_rx_cqe_mpwqe = NULL, /* Not supported */
@@ -729,7 +730,7 @@ int mlx5_rdma_rn_get_params(struct mlx5_core_dev *mdev,
if (rc)
return rc;
- nch = mlx5_get_profile(mdev)->max_nch(mdev);
+ nch = mlx5e_get_max_num_channels(mdev);
*params = (struct rdma_netdev_alloc_params){
.sizeof_priv = sizeof(struct mlx5i_priv) +
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib_vlan.c b/drivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib_vlan.c
index 3dbfa532fda1..b491b8f5fd6b 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib_vlan.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib_vlan.c
@@ -351,7 +351,6 @@ static const struct mlx5e_profile mlx5i_pkey_nic_profile = {
.enable = NULL,
.disable = NULL,
.update_stats = NULL,
- .max_nch = mlx5e_get_max_num_channels,
.rx_handlers.handle_rx_cqe = mlx5i_handle_rx_cqe,
.rx_handlers.handle_rx_cqe_mpwqe = NULL, /* Not supported */
.max_tc = MLX5I_MAX_NUM_TC,
--
2.17.1
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