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From bd1ba9688ed45fe25f151e33657b2c50c0b4f424 Mon Sep 17 00:00:00 2001
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From: Alaa Hleihel <ahleihel@redhat.com>
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Date: Sun, 10 May 2020 14:51:25 -0400
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Subject: [PATCH 008/312] [netdrv] net/mlx5e: xsk: dynamically allocate
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mlx5e_channel_param
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Message-id: <20200510145245.10054-3-ahleihel@redhat.com>
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Patchwork-id: 306542
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Patchwork-instance: patchwork
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O-Subject: [RHEL8.3 BZ 1789378 v2 02/82] net/mlx5e: xsk: dynamically allocate mlx5e_channel_param
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Bugzilla: 1789378
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RH-Acked-by: Kamal Heib <kheib@redhat.com>
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RH-Acked-by: Jarod Wilson <jarod@redhat.com>
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RH-Acked-by: Tony Camuso <tcamuso@redhat.com>
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RH-Acked-by: Jonathan Toppins <jtoppins@redhat.com>
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Bugzilla: http://bugzilla.redhat.com/1789378
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Upstream: v5.4-rc1
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commit 658688ce6c936254c34ea1f31549ec62439574aa
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Author: Arnd Bergmann <arnd@arndb.de>
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Date: Tue Jul 23 12:02:26 2019 +0000
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net/mlx5e: xsk: dynamically allocate mlx5e_channel_param
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The structure is too large to put on the stack, resulting in a
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warning on 32-bit ARM:
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drivers/net/ethernet/mellanox/mlx5/core/en/xsk/setup.c:59:5: error: stack frame size of 1344 bytes in function
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'mlx5e_open_xsk' [-Werror,-Wframe-larger-than=]
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Use kvzalloc() instead.
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Fixes: a038e9794541 ("net/mlx5e: Add XSK zero-copy support")
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Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Signed-off-by: Maxim Mikityanskiy <maximmi@mellanox.com>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: Alaa Hleihel <ahleihel@redhat.com>
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Signed-off-by: Frantisek Hrbata <fhrbata@redhat.com>
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---
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.../net/ethernet/mellanox/mlx5/core/en/xsk/setup.c | 27 ++++++++++++++--------
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1 file changed, 18 insertions(+), 9 deletions(-)
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diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/xsk/setup.c b/drivers/net/ethernet/mellanox/mlx5/core/en/xsk/setup.c
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index 81efd2fbc75d..79060ee60c98 100644
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--- a/drivers/net/ethernet/mellanox/mlx5/core/en/xsk/setup.c
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+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/xsk/setup.c
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@@ -65,24 +65,28 @@ int mlx5e_open_xsk(struct mlx5e_priv *priv, struct mlx5e_params *params,
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struct mlx5e_xsk_param *xsk, struct xdp_umem *umem,
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struct mlx5e_channel *c)
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{
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- struct mlx5e_channel_param cparam = {};
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+ struct mlx5e_channel_param *cparam;
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struct dim_cq_moder icocq_moder = {};
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int err;
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if (!mlx5e_validate_xsk_param(params, xsk, priv->mdev))
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return -EINVAL;
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- mlx5e_build_xsk_cparam(priv, params, xsk, &cparam);
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+ cparam = kvzalloc(sizeof(*cparam), GFP_KERNEL);
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+ if (!cparam)
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+ return -ENOMEM;
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- err = mlx5e_open_cq(c, params->rx_cq_moderation, &cparam.rx_cq, &c->xskrq.cq);
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+ mlx5e_build_xsk_cparam(priv, params, xsk, cparam);
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+
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+ err = mlx5e_open_cq(c, params->rx_cq_moderation, &cparam->rx_cq, &c->xskrq.cq);
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if (unlikely(err))
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- return err;
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+ goto err_free_cparam;
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- err = mlx5e_open_rq(c, params, &cparam.rq, xsk, umem, &c->xskrq);
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+ err = mlx5e_open_rq(c, params, &cparam->rq, xsk, umem, &c->xskrq);
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if (unlikely(err))
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goto err_close_rx_cq;
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- err = mlx5e_open_cq(c, params->tx_cq_moderation, &cparam.tx_cq, &c->xsksq.cq);
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+ err = mlx5e_open_cq(c, params->tx_cq_moderation, &cparam->tx_cq, &c->xsksq.cq);
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if (unlikely(err))
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goto err_close_rq;
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@@ -92,21 +96,23 @@ int mlx5e_open_xsk(struct mlx5e_priv *priv, struct mlx5e_params *params,
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* is disabled and then reenabled, but the SQ continues receiving CQEs
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* from the old UMEM.
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*/
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- err = mlx5e_open_xdpsq(c, params, &cparam.xdp_sq, umem, &c->xsksq, true);
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+ err = mlx5e_open_xdpsq(c, params, &cparam->xdp_sq, umem, &c->xsksq, true);
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if (unlikely(err))
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goto err_close_tx_cq;
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- err = mlx5e_open_cq(c, icocq_moder, &cparam.icosq_cq, &c->xskicosq.cq);
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+ err = mlx5e_open_cq(c, icocq_moder, &cparam->icosq_cq, &c->xskicosq.cq);
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if (unlikely(err))
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goto err_close_sq;
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/* Create a dedicated SQ for posting NOPs whenever we need an IRQ to be
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* triggered and NAPI to be called on the correct CPU.
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*/
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- err = mlx5e_open_icosq(c, params, &cparam.icosq, &c->xskicosq);
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+ err = mlx5e_open_icosq(c, params, &cparam->icosq, &c->xskicosq);
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if (unlikely(err))
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goto err_close_icocq;
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+ kvfree(cparam);
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+
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spin_lock_init(&c->xskicosq_lock);
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set_bit(MLX5E_CHANNEL_STATE_XSK, c->state);
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@@ -128,6 +134,9 @@ int mlx5e_open_xsk(struct mlx5e_priv *priv, struct mlx5e_params *params,
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err_close_rx_cq:
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mlx5e_close_cq(&c->xskrq.cq);
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+err_free_cparam:
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+ kvfree(cparam);
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+
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return err;
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}
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--
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2.13.6
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