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Commit 8e9267bb authored by Radion Mirchevsky's avatar Radion Mirchevsky Committed by Mika Westerberg
Browse files

thunderbolt: Add tb_switch_find_by_route() 



With the new ICM messaging there is need for find switch by route string
instead of link and depth. Add new function that makes it possible.

Signed-off-by: default avatarRadion Mirchevsky <radion.mirchevsky@intel.com>
Signed-off-by: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: default avatarAndy Shevchenko <andy.shevchenko@gmail.com>
parent b6b0ea70

drivers/thunderbolt/switch.c

+33 −0
Original line number Diff line number Diff line
@@ -1479,6 +1479,7 @@ struct tb_sw_lookup { 
	u8 link;

	u8 depth;

	const uuid_t *uuid;

	u64 route;

};



static int tb_switch_match(struct device *dev, void *data)
@@ -1494,6 +1495,11 @@ static int tb_switch_match(struct device *dev, void *data) 
	if (lookup->uuid)

		return !memcmp(sw->uuid, lookup->uuid, sizeof(*lookup->uuid));



	if (lookup->route) {

		return sw->config.route_lo == lower_32_bits(lookup->route) &&

		       sw->config.route_hi == upper_32_bits(lookup->route);

	}



	/* Root switch is matched only by depth */

	if (!lookup->depth)

		return !sw->depth;
@@ -1551,6 +1557,33 @@ struct tb_switch *tb_switch_find_by_uuid(struct tb *tb, const uuid_t *uuid) 
	return NULL;

}



/**

 * tb_switch_find_by_route() - Find switch by route string

 * @tb: Domain the switch belongs

 * @route: Route string to look for

 *

 * Returned switch has reference count increased so the caller needs to

 * call tb_switch_put() when done with the switch.

 */

struct tb_switch *tb_switch_find_by_route(struct tb *tb, u64 route)

{

	struct tb_sw_lookup lookup;

	struct device *dev;



	if (!route)

		return tb_switch_get(tb->root_switch);



	memset(&lookup, 0, sizeof(lookup));

	lookup.tb = tb;

	lookup.route = route;



	dev = bus_find_device(&tb_bus_type, NULL, &lookup, tb_switch_match);

	if (dev)

		return tb_to_switch(dev);



	return NULL;

}



void tb_switch_exit(void)

{

	ida_destroy(&nvm_ida);

drivers/thunderbolt/tb.h

+1 −0
Original line number Diff line number Diff line
@@ -386,6 +386,7 @@ struct tb_switch *get_switch_at_route(struct tb_switch *sw, u64 route); 
struct tb_switch *tb_switch_find_by_link_depth(struct tb *tb, u8 link,

					       u8 depth);

struct tb_switch *tb_switch_find_by_uuid(struct tb *tb, const uuid_t *uuid);

struct tb_switch *tb_switch_find_by_route(struct tb *tb, u64 route);



static inline struct tb_switch *tb_switch_get(struct tb_switch *sw)

{