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mlx4: Use port management change event instead of smp_snoop

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The port management change event can replace smp_snoop.  If the
capability bit for this event is set in dev-caps, the event is used
(by the driver setting the PORT_MNG_CHG_EVENT bit in the async event
mask in the MAP_EQ fw command).  In this case, when the driver passes
incoming SMP PORT_INFO SET mads to the FW, the FW generates port
management change events to signal any changes to the driver.

If the FW generates these events, smp_snoop shouldn't be invoked in
ib_process_mad(), or duplicate events will occur (once from the
FW-generated event, and once from smp_snoop).

In the case where the FW does not generate port management change
events smp_snoop needs to be invoked to create these events.  The flow
in smp_snoop has been modified to make use of the same procedures as
in the fw-generated-event event case to generate the port management
events (LID change, Client-rereg, Pkey change, and/or GID change).

Port management change event handling required changing the
mlx4_ib_event and mlx4_dispatch_event prototypes; the "param" argument
(last argument) had to be changed to unsigned long in order to
accomodate passing the EQE pointer.

We also needed to move the definition of struct mlx4_eqe from
net/mlx4.h to file device.h -- to make it available to the IB driver,
to handle port management change events.

Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Jack Morgenstein
2012-06-19 11:21:40 +03:00
committed by Roland Dreier
parent 3045f09203
commit 00f5ce99dc
10 changed files with 250 additions and 106 deletions
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3
include/linux/mlx4/driver.h
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@@ -42,13 +42,14 @@ enum mlx4_dev_event {
MLX4_DEV_EVENT_PORT_UP,
MLX4_DEV_EVENT_PORT_DOWN,
MLX4_DEV_EVENT_PORT_REINIT,
MLX4_DEV_EVENT_PORT_MGMT_CHANGE,
};
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, int port);
enum mlx4_dev_event event, unsigned long param);
void * (*get_dev)(struct mlx4_dev *dev, void *context, u8 port);
struct list_head list;
enum mlx4_protocol protocol;