litmus-rt.git - The LITMUS^RT kernel.

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author	David S. Miller <davem@davemloft.net>	2010-04-04 04:12:50 -0400
committer	David S. Miller <davem@davemloft.net>	2010-04-04 04:12:50 -0400
commit	bdd32ce95f79fb5cc964cd789d7ae4500bba7c6f (patch)
tree	506a7deeb0e91f8ed8b582a0596303a804a8d779 /include/linux/sysctl.h
parent	954fbc8985328a3b59b5881243d3aa04a8f8da7c (diff)

sunxvr500: Ignore secondary output PCI devices.

These just represent the secondary and further heads attached to the card, and they have different sets of PCI bar registers to map. So don't try to drive them in the main driver. Reported-by: Frans van Berckel <fberckel@xs4all.nl> Tested-by: Frans van Berckel <fberckel@xs4all.nl> Signed-off-by: David S. Miller <davem@davemloft.net>

Diffstat (limited to 'include/linux/sysctl.h')

0 files changed, 0 insertions, 0 deletions

/* -*- mode: c; c-basic-offset: 8 -*- */ /* * MCA bus support functions for legacy (2.4) API. * * Legacy API means the API that operates in terms of MCA slot number * * (C) 2002 James Bottomley <James.Bottomley@HansenPartnership.com> * **----------------------------------------------------------------------------- ** ** This program is free software; you can redistribute it and/or modify ** it under the terms of the GNU General Public License as published by ** the Free Software Foundation; either version 2 of the License, or ** (at your option) any later version. ** ** This program is distributed in the hope that it will be useful, ** but WITHOUT ANY WARRANTY; without even the implied warranty of ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ** GNU General Public License for more details. ** ** You should have received a copy of the GNU General Public License ** along with this program; if not, write to the Free Software ** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. ** **----------------------------------------------------------------------------- */ #include <linux/module.h> #include <linux/device.h> #include <linux/mca-legacy.h> #include <asm/io.h> /* NOTE: This structure is stack allocated */ struct mca_find_adapter_info { int id; int slot; struct mca_device *mca_dev; }; /* The purpose of this iterator is to loop over all the devices and * find the one with the smallest slot number that's just greater than * or equal to the required slot with a matching id */ static int mca_find_adapter_callback(struct device *dev, void *data) { struct mca_find_adapter_info *info = data; struct mca_device *mca_dev = to_mca_device(dev); if(mca_dev->pos_id != info->id) return 0; if(mca_dev->slot < info->slot) return 0; if(!info->mca_dev || info->mca_dev->slot >= mca_dev->slot) info->mca_dev = mca_dev; return 0; } /** * mca_find_adapter - scan for adapters * @id: MCA identification to search for * @start: starting slot * * Search the MCA configuration for adapters matching the 16bit * ID given. The first time it should be called with start as zero * and then further calls made passing the return value of the * previous call until %MCA_NOTFOUND is returned. * * Disabled adapters are not reported. */ int mca_find_adapter(int id, int start) { struct mca_find_adapter_info info; if(id == 0xffff) return MCA_NOTFOUND; info.slot = start; info.id = id; info.mca_dev = NULL; for(;;) { bus_for_each_dev(&mca_bus_type, NULL, &info, mca_find_adapter_callback); if(info.mca_dev == NULL) return MCA_NOTFOUND; if(info.mca_dev->status != MCA_ADAPTER_DISABLED) break; /* OK, found adapter but it was disabled. Go around * again, excluding the slot we just found */ info.slot = info.mca_dev->slot + 1; info.mca_dev = NULL; } return info.mca_dev->slot; } EXPORT_SYMBOL(mca_find_adapter); /*--------------------------------------------------------------------*/ /** * mca_find_unused_adapter - scan for unused adapters * @id: MCA identification to search for * @start: starting slot * * Search the MCA configuration for adapters matching the 16bit * ID given. The first time it should be called with start as zero * and then further calls made passing the return value of the * previous call until %MCA_NOTFOUND is returned. * * Adapters that have been claimed by drivers and those that * are disabled are not reported. This function thus allows a driver * to scan for further cards when some may already be driven. */ int mca_find_unused_adapter(int id, int start) { struct mca_find_adapter_info info = { 0 }; if (!MCA_bus || id == 0xffff) return MCA_NOTFOUND; info.slot = start; info.id = id; info.mca_dev = NULL; for(;;) { bus_for_each_dev(&mca_bus_type, NULL, &info, mca_find_adapter_callback); if(info.mca_dev == NULL) return MCA_NOTFOUND; if(info.mca_dev->status != MCA_ADAPTER_DISABLED && !info.mca_dev->driver_loaded) break; /* OK, found adapter but it was disabled or already in * use. Go around again, excluding the slot we just * found */ info.slot = info.mca_dev->slot + 1; info.mca_dev = NULL; } return info.mca_dev->slot; } EXPORT_SYMBOL(mca_find_unused_adapter); /* NOTE: stack allocated structure */ struct mca_find_device_by_slot_info { int slot; struct mca_device *mca_dev; }; static int mca_find_device_by_slot_callback(struct device *dev, void *data) { struct mca_find_device_by_slot_info *info = data; struct mca_device *mca_dev = to_mca_device(dev); if(mca_dev->slot == info->slot) info->mca_dev = mca_dev; return 0; } struct mca_device *mca_find_device_by_slot(int slot) { struct mca_find_device_by_slot_info info; info.slot = slot; info.mca_dev = NULL; bus_for_each_dev(&mca_bus_type, NULL, &info, mca_find_device_by_slot_callback); return info.mca_dev; } /** * mca_read_stored_pos - read POS register from boot data * @slot: slot number to read from * @reg: register to read from * * Fetch a POS value that was stored at boot time by the kernel * when it scanned the MCA space. The register value is returned. * Missing or invalid registers report 0.


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