forked from luck/tmp_suning_uos_patched
9edbc30b43
Update enumeration/discovery method registration mechanism to allow loading enumeration/discovery methods before all mports are registered. Existing statically linked RapidIO subsystem expects that all available RapidIO mport devices are initialized and registered before the enumeration/discovery method is registered. Switching to loadable mport device drivers creates situation when mport device driver can be loaded after enumeration/discovery method is attached (e.g., loadable mport driver in a system with statically linked RapidIO core and enumerator). This also will happen in a system with hot-pluggable RapidIO controllers. To remove the dependency on the initialization/registration order this patch introduces enumeration/discovery registration mechanism that supports arbitrary registration order of mports and enumerator/discovery methods. The following registration rules are implemented: - only one enumeration/discovery method can be registered for given mport ID (including RIO_MPORT_ANY); - when new enumeration/discovery methods tries to attach to the registered mport device, method with matching mport ID will replace a default method previously registered for given mport (if any); - enumeration/discovery method with target ID=RIO_MPORT_ANY will be attached only to mports that do not have another enumerator attached to them; - when new mport device is registered with RapidIO subsystem, registration routine searches for the enumeration/discovery method with the best matching mport ID; 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>
56 lines
2.4 KiB
C
56 lines
2.4 KiB
C
/*
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* RapidIO interconnect services
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*
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* Copyright 2005 MontaVista Software, Inc.
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* Matt Porter <mporter@kernel.crashing.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/device.h>
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#include <linux/list.h>
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#include <linux/rio.h>
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#define RIO_MAX_CHK_RETRY 3
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#define RIO_MPORT_ANY (-1)
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/* Functions internal to the RIO core code */
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extern u32 rio_mport_get_feature(struct rio_mport *mport, int local, u16 destid,
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u8 hopcount, int ftr);
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extern u32 rio_mport_get_physefb(struct rio_mport *port, int local,
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u16 destid, u8 hopcount);
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extern u32 rio_mport_get_efb(struct rio_mport *port, int local, u16 destid,
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u8 hopcount, u32 from);
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extern int rio_mport_chk_dev_access(struct rio_mport *mport, u16 destid,
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u8 hopcount);
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extern int rio_create_sysfs_dev_files(struct rio_dev *rdev);
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extern int rio_lock_device(struct rio_mport *port, u16 destid,
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u8 hopcount, int wait_ms);
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extern int rio_unlock_device(struct rio_mport *port, u16 destid, u8 hopcount);
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extern int rio_route_add_entry(struct rio_dev *rdev,
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u16 table, u16 route_destid, u8 route_port, int lock);
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extern int rio_route_get_entry(struct rio_dev *rdev, u16 table,
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u16 route_destid, u8 *route_port, int lock);
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extern int rio_route_clr_table(struct rio_dev *rdev, u16 table, int lock);
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extern int rio_set_port_lockout(struct rio_dev *rdev, u32 pnum, int lock);
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extern struct rio_dev *rio_get_comptag(u32 comp_tag, struct rio_dev *from);
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extern int rio_add_device(struct rio_dev *rdev);
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extern int rio_enable_rx_tx_port(struct rio_mport *port, int local, u16 destid,
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u8 hopcount, u8 port_num);
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extern int rio_register_scan(int mport_id, struct rio_scan *scan_ops);
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extern int rio_unregister_scan(int mport_id, struct rio_scan *scan_ops);
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extern void rio_attach_device(struct rio_dev *rdev);
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extern struct rio_mport *rio_find_mport(int mport_id);
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extern int rio_mport_scan(int mport_id);
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/* Structures internal to the RIO core code */
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extern struct device_attribute rio_dev_attrs[];
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extern struct bus_attribute rio_bus_attrs[];
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#define RIO_GET_DID(size, x) (size ? (x & 0xffff) : ((x & 0x00ff0000) >> 16))
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#define RIO_SET_DID(size, x) (size ? (x & 0xffff) : ((x & 0x000000ff) << 16))
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