Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit ecc82c53 authored by Leon Romanovsky's avatar Leon Romanovsky
Browse files

RDMA/core: Add and expose static device index 



This patch adds static device index in similar fashion to
already available in netdev world (struct net->ifindex).

In downstream patches, the RDMA nelink will use this idx-to-ib_device
conversion, so as part of this commit, we are exposing the translation
function to be visible for IB/core users.

Signed-off-by: default avatarLeon Romanovsky <leonro@mellanox.com>
parent 8030c835

drivers/infiniband/core/core_priv.h

+5 −0
Original line number Diff line number Diff line
@@ -309,4 +309,9 @@ static inline int ib_mad_enforce_security(struct ib_mad_agent_private *map, 
	return 0;

}

#endif



struct ib_device *__ib_device_get_by_index(u32 ifindex);

/* RDMA device netlink */

void nldev_init(void);

void nldev_exit(void);

#endif /* _CORE_PRIV_H */

drivers/infiniband/core/device.c

+36 −1
Original line number Diff line number Diff line
@@ -134,6 +134,17 @@ static int ib_device_check_mandatory(struct ib_device *device) 
	return 0;

}



struct ib_device *__ib_device_get_by_index(u32 index)

{

	struct ib_device *device;



	list_for_each_entry(device, &device_list, core_list)

		if (device->index == index)

			return device;



	return NULL;

}



static struct ib_device *__ib_device_get_by_name(const char *name)

{

	struct ib_device *device;
@@ -145,7 +156,6 @@ static struct ib_device *__ib_device_get_by_name(const char *name) 
	return NULL;

}





static int alloc_name(char *name)

{

	unsigned long *inuse;
@@ -394,6 +404,30 @@ static int ib_security_change(struct notifier_block *nb, unsigned long event, 
	return NOTIFY_OK;

}



/**

 *	__dev_new_index	-	allocate an device index

 *

 *	Returns a suitable unique value for a new device interface

 *	number.  It assumes that there are less than 2^32-1 ib devices

 *	will be present in the system.

 */

static u32 __dev_new_index(void)

{

	/*

	 * The device index to allow stable naming.

	 * Similar to struct net -> ifindex.

	 */

	static u32 index;



	for (;;) {

		if (!(++index))

			index = 1;



		if (!__ib_device_get_by_index(index))

			return index;

	}

}



/**

 * ib_register_device - Register an IB device with IB core

 * @device:Device to register
@@ -492,6 +526,7 @@ int ib_register_device(struct ib_device *device, 
		if (client->add && !add_client_context(device, client))

			client->add(device);



	device->index = __dev_new_index();

	down_write(&lists_rwsem);

	list_add_tail(&device->core_list, &device_list);

	up_write(&lists_rwsem);

include/rdma/ib_verbs.h

+2 −0
Original line number Diff line number Diff line
@@ -2298,6 +2298,8 @@ struct ib_device { 
	struct rdmacg_device         cg_device;

#endif



	u32                          index;



	/**

	 * The following mandatory functions are used only at device

	 * registration.  Keep functions such as these at the end of this