forked from luck/tmp_suning_uos_patched
a11650e110
Systems that use RapidIO fabric may need to implement their own enumeration and discovery methods which are better suitable for needs of a target application. The following set of patches is intended to simplify process of introduction of new RapidIO fabric enumeration/discovery methods. The first patch offers ability to add new RapidIO enumeration/discovery methods using kernel configuration options. This new configuration option mechanism allows to select statically linked or modular enumeration/discovery method(s) from the list of existing methods or use external module(s). This patch also updates the currently existing enumeration/discovery code to be used as a statically linked or modular method. The corresponding configuration option is named "Basic enumeration/discovery" method. This is the only one configuration option available today but new methods are expected to be introduced after adoption of provided patches. The second patch address a long time complaint of RapidIO subsystem users regarding fabric enumeration/discovery start sequence. Existing implementation offers only a boot-time enumeration/discovery start which requires synchronized boot of all endpoints in RapidIO network. While it works for small closed configurations with limited number of endpoints, using this approach in systems with large number of endpoints is quite challenging. To eliminate requirement for synchronized start the second patch introduces RapidIO enumeration/discovery start from user space. For compatibility with the existing RapidIO subsystem implementation, automatic boot time enumeration/discovery start can be configured in by specifying "rio-scan.scan=1" command line parameter if statically linked basic enumeration method is selected. This patch: Rework to implement RapidIO enumeration/discovery method selection combined with ability to use enumeration/discovery as a kernel module. This patch adds ability to introduce new RapidIO enumeration/discovery methods using kernel configuration options. Configuration option mechanism allows to select statically linked or modular enumeration/discovery method from the list of existing methods or use external modules. If a modular enumeration/discovery is selected each RapidIO mport device can have its own method attached to it. The existing enumeration/discovery code was updated to be used as statically linked or modular method. This configuration option is named "Basic enumeration/discovery" method. Several common routines have been moved from rio-scan.c to make them available to other enumeration methods and reduce number of exported symbols. 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> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
78 lines
3.2 KiB
C
78 lines
3.2 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_std_route_add_entry(struct rio_mport *mport, u16 destid,
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u8 hopcount, u16 table, u16 route_destid,
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u8 route_port);
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extern int rio_std_route_get_entry(struct rio_mport *mport, u16 destid,
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u8 hopcount, u16 table, u16 route_destid,
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u8 *route_port);
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extern int rio_std_route_clr_table(struct rio_mport *mport, u16 destid,
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u8 hopcount, u16 table);
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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 void rio_switch_init(struct rio_dev *rdev, int do_enum);
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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);
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extern void rio_attach_device(struct rio_dev *rdev);
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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 rio_switch_ops __start_rio_switch_ops[];
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extern struct rio_switch_ops __end_rio_switch_ops[];
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/* Helpers internal to the RIO core code */
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#define DECLARE_RIO_SWITCH_SECTION(section, name, vid, did, init_hook) \
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static const struct rio_switch_ops __rio_switch_##name __used \
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__section(section) = { vid, did, init_hook };
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/**
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* DECLARE_RIO_SWITCH_INIT - Registers switch initialization routine
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* @vid: RIO vendor ID
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* @did: RIO device ID
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* @init_hook: Callback that performs switch-specific initialization
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*
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* Manipulating switch route tables and error management in RIO
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* is switch specific. This registers a switch by vendor and device ID with
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* initialization callback for setting up switch operations and (if required)
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* hardware initialization. A &struct rio_switch_ops is initialized with
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* pointer to the init routine and placed into a RIO-specific kernel section.
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*/
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#define DECLARE_RIO_SWITCH_INIT(vid, did, init_hook) \
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DECLARE_RIO_SWITCH_SECTION(.rio_switch_ops, vid##did, \
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vid, did, init_hook)
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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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