rapidio: convert switch drivers to modules

Rework RapidIO switch drivers to add an option to build them as loadable
kernel modules.

This patch removes RapidIO-specific vmlinux section and converts switch
drivers to be compatible with LDM driver registration method.  To simplify
registration of device-specific callback routines this patch introduces
rio_switch_ops data structure.  The sw_sysfs() callback is removed from
the list of device-specific operations because under the new structure its
functions can be handled by switch driver's probe() and remove() routines.

If a specific switch device driver is not loaded the RapidIO subsystem
core will use default standard-based operations to configure a switch.
Because the current implementation of RapidIO enumeration/discovery method
relies on availability of device-specific operations for error management,
switch device drivers must be loaded before the RapidIO
enumeration/discovery starts.

This patch also moves several common routines from enumeration/discovery
module into the RapidIO core code to make switch-specific operations
accessible to all components of RapidIO subsystem.

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Li Yang <leoli@freescale.com>
Cc: Kumar Gala <galak@kernel.crashing.org>
Cc: Andre van Herk <andre.van.herk@Prodrive.nl>
Cc: Micha Nelissen <micha.nelissen@Prodrive.nl>
Cc: Stef van Os <stef.van.os@Prodrive.nl>
Cc: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 8 insertions, 33 deletions

diff --git a/drivers/rapidio/rio.h b/drivers/rapidio/rio.h
index c14f864dea5c..d59587762c76 100644
--- a/drivers/rapidio/rio.h
+++ b/drivers/rapidio/rio.h
@@ -28,18 +28,17 @@ extern u32 rio_mport_get_efb(struct rio_mport *port, int local, u16 destid,
 extern int rio_mport_chk_dev_access(struct rio_mport *mport, u16 destid,
 				    u8 hopcount);
 extern int rio_create_sysfs_dev_files(struct rio_dev *rdev);
-extern int rio_std_route_add_entry(struct rio_mport *mport, u16 destid,
-				   u8 hopcount, u16 table, u16 route_destid,
-				   u8 route_port);
-extern int rio_std_route_get_entry(struct rio_mport *mport, u16 destid,
-				   u8 hopcount, u16 table, u16 route_destid,
-				   u8 *route_port);
-extern int rio_std_route_clr_table(struct rio_mport *mport, u16 destid,
-				   u8 hopcount, u16 table);
+extern int rio_lock_device(struct rio_mport *port, u16 destid,
+			u8 hopcount, int wait_ms);
+extern int rio_unlock_device(struct rio_mport *port, u16 destid, u8 hopcount);
+extern int rio_route_add_entry(struct rio_dev *rdev,
+			u16 table, u16 route_destid, u8 route_port, int lock);
+extern int rio_route_get_entry(struct rio_dev *rdev, u16 table,
+			u16 route_destid, u8 *route_port, int lock);
+extern int rio_route_clr_table(struct rio_dev *rdev, u16 table, int lock);
 extern int rio_set_port_lockout(struct rio_dev *rdev, u32 pnum, int lock);
 extern struct rio_dev *rio_get_comptag(u32 comp_tag, struct rio_dev *from);
 extern int rio_add_device(struct rio_dev *rdev);
-extern void rio_switch_init(struct rio_dev *rdev, int do_enum);
 extern int rio_enable_rx_tx_port(struct rio_mport *port, int local, u16 destid,
 				 u8 hopcount, u8 port_num);
 extern int rio_register_scan(int mport_id, struct rio_scan *scan_ops);
@@ -51,29 +50,5 @@ extern struct rio_mport *rio_find_mport(int mport_id);
 extern struct device_attribute rio_dev_attrs[];
 extern struct bus_attribute rio_bus_attrs[];
 
-extern struct rio_switch_ops __start_rio_switch_ops[];
-extern struct rio_switch_ops __end_rio_switch_ops[];
-
-/* Helpers internal to the RIO core code */
-#define DECLARE_RIO_SWITCH_SECTION(section, name, vid, did, init_hook) \
-	static const struct rio_switch_ops __rio_switch_##name __used \
-	__section(section) = { vid, did, init_hook };
-
-/**
- * DECLARE_RIO_SWITCH_INIT - Registers switch initialization routine
- * @vid: RIO vendor ID
- * @did: RIO device ID
- * @init_hook: Callback that performs switch-specific initialization
- *
- * Manipulating switch route tables and error management in RIO
- * is switch specific. This registers a switch by vendor and device ID with
- * initialization callback for setting up switch operations and (if required)
- * hardware initialization. A &struct rio_switch_ops is initialized with
- * pointer to the init routine and placed into a RIO-specific kernel section.
- */
-#define DECLARE_RIO_SWITCH_INIT(vid, did, init_hook)		\
-	DECLARE_RIO_SWITCH_SECTION(.rio_switch_ops, vid##did, \
-			vid, did, init_hook)
-
 #define RIO_GET_DID(size, x)	(size ? (x & 0xffff) : ((x & 0x00ff0000) >> 16))
 #define RIO_SET_DID(size, x)	(size ? (x & 0xffff) : ((x & 0x000000ff) << 16))