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Message-Id: <20230821131225.11290-4-petr.pavlu@suse.com>
Date: Mon, 21 Aug 2023 15:12:17 +0200
From: Petr Pavlu <petr.pavlu@...e.com>
To: tariqt@...dia.com, yishaih@...dia.com, leon@...nel.org
Cc: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
pabeni@...hat.com, jgg@...pe.ca, netdev@...r.kernel.org,
linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org,
Petr Pavlu <petr.pavlu@...e.com>
Subject: [PATCH net-next v3 03/11] mlx4: Use 'void *' as the event param of mlx4_dispatch_event()
Function mlx4_dispatch_event() takes an 'unsigned long' as its event
parameter. The actual value is none (MLX4_DEV_EVENT_CATASTROPHIC_ERROR),
a pointer to mlx4_eqe (MLX4_DEV_EVENT_PORT_MGMT_CHANGE), or a 32-bit
integer (remaining events).
In preparation to switch mlx4_en and mlx4_ib to be an auxiliary device,
the mlx4_interface.event callback is replaced with a notifier and
function mlx4_dispatch_event() gets updated to invoke
atomic_notifier_call_chain(). This requires forwarding the input 'param'
value from the former function to the latter. A problem is that the
notifier call takes 'void *' as its 'param' value, compared to
'unsigned long' used by mlx4_dispatch_event(). Re-passing the value
would need either punning it to 'void *' or passing down the address of
the input 'param'. Both approaches create a number of unnecessary casts.
Change instead the input 'param' of mlx4_dispatch_event() from
'unsigned long' to 'void *'. A mlx4_eqe pointer can be passed directly,
callers using an int value are adjusted to pass its address.
Signed-off-by: Petr Pavlu <petr.pavlu@...e.com>
---
drivers/infiniband/hw/mlx4/main.c | 14 ++++++++++----
drivers/net/ethernet/mellanox/mlx4/catas.c | 2 +-
drivers/net/ethernet/mellanox/mlx4/cmd.c | 4 ++--
drivers/net/ethernet/mellanox/mlx4/en_main.c | 17 +++++++++++++++--
drivers/net/ethernet/mellanox/mlx4/eq.c | 15 ++++++++-------
drivers/net/ethernet/mellanox/mlx4/intf.c | 2 +-
drivers/net/ethernet/mellanox/mlx4/mlx4.h | 2 +-
include/linux/mlx4/driver.h | 2 +-
8 files changed, 39 insertions(+), 19 deletions(-)
diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c
index 7dd70d778b6b..2c5fd8174b3c 100644
--- a/drivers/infiniband/hw/mlx4/main.c
+++ b/drivers/infiniband/hw/mlx4/main.c
@@ -3174,7 +3174,7 @@ void mlx4_sched_ib_sl2vl_update_work(struct mlx4_ib_dev *ibdev,
}
static void mlx4_ib_event(struct mlx4_dev *dev, void *ibdev_ptr,
- enum mlx4_dev_event event, unsigned long param)
+ enum mlx4_dev_event event, void *param)
{
struct ib_event ibev;
struct mlx4_ib_dev *ibdev = to_mdev((struct ib_device *) ibdev_ptr);
@@ -3194,10 +3194,16 @@ static void mlx4_ib_event(struct mlx4_dev *dev, void *ibdev_ptr,
return;
}
- if (event == MLX4_DEV_EVENT_PORT_MGMT_CHANGE)
+ switch (event) {
+ case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
+ break;
+ case MLX4_DEV_EVENT_PORT_MGMT_CHANGE:
eqe = (struct mlx4_eqe *)param;
- else
- p = (int) param;
+ break;
+ default:
+ p = *(int *)param;
+ break;
+ }
switch (event) {
case MLX4_DEV_EVENT_PORT_UP:
diff --git a/drivers/net/ethernet/mellanox/mlx4/catas.c b/drivers/net/ethernet/mellanox/mlx4/catas.c
index 0eb7b83637d8..0d8a362c2673 100644
--- a/drivers/net/ethernet/mellanox/mlx4/catas.c
+++ b/drivers/net/ethernet/mellanox/mlx4/catas.c
@@ -194,7 +194,7 @@ void mlx4_enter_error_state(struct mlx4_dev_persistent *persist)
mutex_unlock(&persist->device_state_mutex);
/* At that step HW was already reset, now notify clients */
- mlx4_dispatch_event(dev, MLX4_DEV_EVENT_CATASTROPHIC_ERROR, 0);
+ mlx4_dispatch_event(dev, MLX4_DEV_EVENT_CATASTROPHIC_ERROR, NULL);
mlx4_cmd_wake_completions(dev);
return;
diff --git a/drivers/net/ethernet/mellanox/mlx4/cmd.c b/drivers/net/ethernet/mellanox/mlx4/cmd.c
index c56d2194cbfc..f5b1f8c7834f 100644
--- a/drivers/net/ethernet/mellanox/mlx4/cmd.c
+++ b/drivers/net/ethernet/mellanox/mlx4/cmd.c
@@ -2113,7 +2113,7 @@ static void mlx4_master_do_cmd(struct mlx4_dev *dev, int slave, u8 cmd,
if (MLX4_COMM_CMD_FLR == slave_state[slave].last_cmd)
goto inform_slave_state;
- mlx4_dispatch_event(dev, MLX4_DEV_EVENT_SLAVE_SHUTDOWN, slave);
+ mlx4_dispatch_event(dev, MLX4_DEV_EVENT_SLAVE_SHUTDOWN, &slave);
/* write the version in the event field */
reply |= mlx4_comm_get_version();
@@ -2152,7 +2152,7 @@ static void mlx4_master_do_cmd(struct mlx4_dev *dev, int slave, u8 cmd,
if (mlx4_master_activate_admin_state(priv, slave))
goto reset_slave;
slave_state[slave].active = true;
- mlx4_dispatch_event(dev, MLX4_DEV_EVENT_SLAVE_INIT, slave);
+ mlx4_dispatch_event(dev, MLX4_DEV_EVENT_SLAVE_INIT, &slave);
break;
case MLX4_COMM_CMD_VHCR_POST:
if ((slave_state[slave].last_cmd != MLX4_COMM_CMD_VHCR_EN) &&
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_main.c b/drivers/net/ethernet/mellanox/mlx4/en_main.c
index be8ba34c9025..83dae886ade6 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_main.c
@@ -184,10 +184,22 @@ static void mlx4_en_get_profile(struct mlx4_en_dev *mdev)
}
static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr,
- enum mlx4_dev_event event, unsigned long port)
+ enum mlx4_dev_event event, void *param)
{
struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr;
struct mlx4_en_priv *priv;
+ int port;
+
+ switch (event) {
+ case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
+ case MLX4_DEV_EVENT_PORT_MGMT_CHANGE:
+ case MLX4_DEV_EVENT_SLAVE_INIT:
+ case MLX4_DEV_EVENT_SLAVE_SHUTDOWN:
+ break;
+ default:
+ port = *(int *)param;
+ break;
+ }
switch (event) {
case MLX4_DEV_EVENT_PORT_UP:
@@ -205,6 +217,7 @@ static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr,
mlx4_err(mdev, "Internal error detected, restarting device\n");
break;
+ case MLX4_DEV_EVENT_PORT_MGMT_CHANGE:
case MLX4_DEV_EVENT_SLAVE_INIT:
case MLX4_DEV_EVENT_SLAVE_SHUTDOWN:
break;
@@ -213,7 +226,7 @@ static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr,
!mdev->pndev[port])
return;
mlx4_warn(mdev, "Unhandled event %d for port %d\n", event,
- (int) port);
+ port);
}
}
diff --git a/drivers/net/ethernet/mellanox/mlx4/eq.c b/drivers/net/ethernet/mellanox/mlx4/eq.c
index 414e390e6b48..6598b10a9ff4 100644
--- a/drivers/net/ethernet/mellanox/mlx4/eq.c
+++ b/drivers/net/ethernet/mellanox/mlx4/eq.c
@@ -501,7 +501,7 @@ static int mlx4_eq_int(struct mlx4_dev *dev, struct mlx4_eq *eq)
int port;
int slave = 0;
int ret;
- u32 flr_slave;
+ int flr_slave;
u8 update_slave_state;
int i;
enum slave_port_gen_event gen_event;
@@ -606,8 +606,8 @@ static int mlx4_eq_int(struct mlx4_dev *dev, struct mlx4_eq *eq)
port = be32_to_cpu(eqe->event.port_change.port) >> 28;
slaves_port = mlx4_phys_to_slaves_pport(dev, port);
if (eqe->subtype == MLX4_PORT_CHANGE_SUBTYPE_DOWN) {
- mlx4_dispatch_event(dev, MLX4_DEV_EVENT_PORT_DOWN,
- port);
+ mlx4_dispatch_event(
+ dev, MLX4_DEV_EVENT_PORT_DOWN, &port);
mlx4_priv(dev)->sense.do_sense_port[port] = 1;
if (!mlx4_is_master(dev))
break;
@@ -647,7 +647,8 @@ static int mlx4_eq_int(struct mlx4_dev *dev, struct mlx4_eq *eq)
}
}
} else {
- mlx4_dispatch_event(dev, MLX4_DEV_EVENT_PORT_UP, port);
+ mlx4_dispatch_event(dev, MLX4_DEV_EVENT_PORT_UP,
+ &port);
mlx4_priv(dev)->sense.do_sense_port[port] = 0;
@@ -758,7 +759,7 @@ static int mlx4_eq_int(struct mlx4_dev *dev, struct mlx4_eq *eq)
}
spin_unlock_irqrestore(&priv->mfunc.master.slave_state_lock, flags);
mlx4_dispatch_event(dev, MLX4_DEV_EVENT_SLAVE_SHUTDOWN,
- flr_slave);
+ &flr_slave);
queue_work(priv->mfunc.master.comm_wq,
&priv->mfunc.master.slave_flr_event_work);
break;
@@ -787,8 +788,8 @@ static int mlx4_eq_int(struct mlx4_dev *dev, struct mlx4_eq *eq)
break;
case MLX4_EVENT_TYPE_PORT_MNG_CHG_EVENT:
- mlx4_dispatch_event(dev, MLX4_DEV_EVENT_PORT_MGMT_CHANGE,
- (unsigned long) eqe);
+ mlx4_dispatch_event(
+ dev, MLX4_DEV_EVENT_PORT_MGMT_CHANGE, eqe);
break;
case MLX4_EVENT_TYPE_RECOVERABLE_ERROR_EVENT:
diff --git a/drivers/net/ethernet/mellanox/mlx4/intf.c b/drivers/net/ethernet/mellanox/mlx4/intf.c
index 28d7da925d36..a761971cd0c4 100644
--- a/drivers/net/ethernet/mellanox/mlx4/intf.c
+++ b/drivers/net/ethernet/mellanox/mlx4/intf.c
@@ -180,7 +180,7 @@ int mlx4_do_bond(struct mlx4_dev *dev, bool enable)
}
void mlx4_dispatch_event(struct mlx4_dev *dev, enum mlx4_dev_event type,
- unsigned long param)
+ void *param)
{
struct mlx4_priv *priv = mlx4_priv(dev);
struct mlx4_device_context *dev_ctx;
diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4.h b/drivers/net/ethernet/mellanox/mlx4/mlx4.h
index 6ccf340660d9..de5699a4ddaa 100644
--- a/drivers/net/ethernet/mellanox/mlx4/mlx4.h
+++ b/drivers/net/ethernet/mellanox/mlx4/mlx4.h
@@ -1048,7 +1048,7 @@ int mlx4_restart_one(struct pci_dev *pdev);
int mlx4_register_device(struct mlx4_dev *dev);
void mlx4_unregister_device(struct mlx4_dev *dev);
void mlx4_dispatch_event(struct mlx4_dev *dev, enum mlx4_dev_event type,
- unsigned long param);
+ void *param);
struct mlx4_dev_cap;
struct mlx4_init_hca_param;
diff --git a/include/linux/mlx4/driver.h b/include/linux/mlx4/driver.h
index 923951e19300..032d7f5bfef6 100644
--- a/include/linux/mlx4/driver.h
+++ b/include/linux/mlx4/driver.h
@@ -58,7 +58,7 @@ struct mlx4_interface {
void * (*add) (struct mlx4_dev *dev);
void (*remove)(struct mlx4_dev *dev, void *context);
void (*event) (struct mlx4_dev *dev, void *context,
- enum mlx4_dev_event event, unsigned long param);
+ enum mlx4_dev_event event, void *param);
void (*activate)(struct mlx4_dev *dev, void *context);
struct list_head list;
enum mlx4_protocol protocol;
--
2.35.3
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