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e274e0ed0a
Add explicit device access check before performing device enumeration. This gives a chance to clear possible link error conditions by issuing safe maintenance read request(s). Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com> Cc: Thomas Moll <thomas.moll@sysgo.com> Cc: Matt Porter <mporter@kernel.crashing.org> Cc: Li Yang <leoli@freescale.com> Cc: Kumar Gala <galak@kernel.crashing.org> Cc: Micha Nelissen <micha@neli.hopto.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
72 lines
2.9 KiB
C
72 lines
2.9 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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/* 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_enum_mport(struct rio_mport *mport);
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extern int rio_disc_mport(struct rio_mport *mport);
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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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/* Structures internal to the RIO core code */
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extern struct device_attribute rio_dev_attrs[];
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extern spinlock_t rio_global_list_lock;
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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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