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freebsd-skq/sys/dev/pci/pci_private.h

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Start each of the license/copyright comments with /*-, minor shuffle of lines
2005-01-06 01:43:34 +00:00
/*-
Use the pci.c code wherever possible, rather than copying all the pci code into cardbus and s/pci/cardbus. This exposes a few pci_* functions that are now static. This work is similar to work Justin posted to the mobile list about a year or two ago, which I have neglected since then. This is a subset of his current work with the multiple inheritance newbus architecutre. When completed, that will eliminate the need for pci/pci_private.h. Similar work is needed for the cardbus_cis and pccard_cis code as well.
2002-02-27 05:09:14 +00:00
* Copyright (c) 1997, Stefan Esser <se@freebsd.org>
* Copyright (c) 2000, Michael Smith <msmith@freebsd.org>
* Copyright (c) 2000, BSDi
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice unmodified, this list of conditions, and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*
*/
#ifndef _PCI_PRIVATE_H_
Replace #define<space> with #define<tab> so the code is consistent with style(9) and avoids mixing the two formats.
2006-12-14 16:53:48 +00:00
#define _PCI_PRIVATE_H_
Use the pci.c code wherever possible, rather than copying all the pci code into cardbus and s/pci/cardbus. This exposes a few pci_* functions that are now static. This work is similar to work Justin posted to the mobile list about a year or two ago, which I have neglected since then. This is a subset of his current work with the multiple inheritance newbus architecutre. When completed, that will eliminate the need for pci/pci_private.h. Similar work is needed for the cardbus_cis and pccard_cis code as well.
2002-02-27 05:09:14 +00:00
/*
* Export definitions of the pci bus so that we can more easily share
Make the 'pci_devclass' pointer variable private (drivers really shouldn't share devclass pointers, a mistake I've encouraged in the past) and move the declaration of the pci_driver kobj class from cardbus.c to pci_private.h so that other drivers can inherit from pci_driver.
2006-01-20 22:00:50 +00:00
* it with "subclass" busses.
Use the pci.c code wherever possible, rather than copying all the pci code into cardbus and s/pci/cardbus. This exposes a few pci_* functions that are now static. This work is similar to work Justin posted to the mobile list about a year or two ago, which I have neglected since then. This is a subset of his current work with the multiple inheritance newbus architecutre. When completed, that will eliminate the need for pci/pci_private.h. Similar work is needed for the cardbus_cis and pccard_cis code as well.
2002-02-27 05:09:14 +00:00
*/
Make the 'pci_devclass' pointer variable private (drivers really shouldn't share devclass pointers, a mistake I've encouraged in the past) and move the declaration of the pci_driver kobj class from cardbus.c to pci_private.h so that other drivers can inherit from pci_driver.
2006-01-20 22:00:50 +00:00
DECLARE_CLASS(pci_driver);
Various changes to make it easier to subclass the PCI bus device. - Make the pci devclass a global variable. - Add child devices in pci_attach() instead of pci_probe(). Change pci_probe() to just check for a valid bus number from the associated bridge and return -1000 if successful. This allows subclasses of the PCI bus driver to override the generic driver. - Move the code to load the vendor data into its own public function. Really though, doing this at attach is just plain wrong. This should really be done in the module load routine instead. As a side effect, the 'busno' variable in pci_attach() is now no longer static (minor bug that was harmless so far.) - Change pci_add_children() to take an extra argument that is the size of the device info structure passed to pci_read_device() and make it public so subclasses of the PCI bus can call it in their attach routines. - Move the bits to attach a probed PCI child to a PCI bus into a global pci_add_child() function. This will allow subclasses that can detect a PCI device not found in the normal PCI probe to add those devices in their own attach routine. (I have seen this in the ACPI tree on my laptop for example.) As a side effect, change the static function pci_add_resources() to get the busno, slot, and func from the passed in dinfo structure instead of requiring them as function arguments. Tested on: i386, alpha, ia64, sparc64
2002-08-26 15:23:52 +00:00
void pci_add_children(device_t dev, int busno, size_t dinfo_size);
void pci_add_child(device_t bus, struct pci_devinfo *dinfo);
Expose pci_add_resources to the outside world, add a 'force' flag to force allocation of unallocated BARs (cardbus uses this to preallocate everything). Add a prefetchmask to allow for busses that get prefetch hints to set them. Addjust pci_add_map and pci_ata_maps to take a new force flag which pci_add_resources will pass in. Implement 'force' in pci_add_map. Write new value of allocated resource into the bar, if the allocation succeeded (we should have done this before, but with the new force the bug was very obvious).
2005-12-30 19:28:26 +00:00
void pci_add_resources(device_t bus, device_t dev, int force,
uint32_t prefetchmask);
Omnibus PCI commit: o Save and restore bars for suspend/resume as well as for D3->D0 transitions. o preallocate resources that the PCI devices use to avoid resource conflicts o lazy allocation of resources not allocated by the BIOS. o set unattached drivers to state D3. Set power state to D0 before probe/attach. Right now there's two special cases for this (display and memory devices) that need work in other areas of the tree. Please report any bugs to me.
2004-04-09 15:44:34 +00:00
void pci_driver_added(device_t dev, driver_t *driver);
Use the pci.c code wherever possible, rather than copying all the pci code into cardbus and s/pci/cardbus. This exposes a few pci_* functions that are now static. This work is similar to work Justin posted to the mobile list about a year or two ago, which I have neglected since then. This is a subset of his current work with the multiple inheritance newbus architecutre. When completed, that will eliminate the need for pci/pci_private.h. Similar work is needed for the cardbus_cis and pccard_cis code as well.
2002-02-27 05:09:14 +00:00
int pci_print_child(device_t dev, device_t child);
void pci_probe_nomatch(device_t dev, device_t child);
int pci_read_ivar(device_t dev, device_t child, int which,
uintptr_t *result);
int pci_write_ivar(device_t dev, device_t child, int which,
uintptr_t value);
provide routines to access VPD data at the PCI layer... remove sk's own implementation, and use the new calls to get the data... Reviewed by: -arch
2006-10-09 16:15:56 +00:00
int pci_get_vpd_ident_method(device_t dev, device_t child,
const char **identptr);
int pci_get_vpd_readonly_method(device_t dev, device_t child,
const char *kw, const char **vptr);
Use the pci.c code wherever possible, rather than copying all the pci code into cardbus and s/pci/cardbus. This exposes a few pci_* functions that are now static. This work is similar to work Justin posted to the mobile list about a year or two ago, which I have neglected since then. This is a subset of his current work with the multiple inheritance newbus architecutre. When completed, that will eliminate the need for pci/pci_private.h. Similar work is needed for the cardbus_cis and pccard_cis code as well.
2002-02-27 05:09:14 +00:00
int pci_set_powerstate_method(device_t dev, device_t child,
int state);
int pci_get_powerstate_method(device_t dev, device_t child);
Prefer the uintXX_t to the u_intXX_t names.
2003-08-22 03:11:53 +00:00
uint32_t pci_read_config_method(device_t dev, device_t child,
Use the pci.c code wherever possible, rather than copying all the pci code into cardbus and s/pci/cardbus. This exposes a few pci_* functions that are now static. This work is similar to work Justin posted to the mobile list about a year or two ago, which I have neglected since then. This is a subset of his current work with the multiple inheritance newbus architecutre. When completed, that will eliminate the need for pci/pci_private.h. Similar work is needed for the cardbus_cis and pccard_cis code as well.
2002-02-27 05:09:14 +00:00
int reg, int width);
void pci_write_config_method(device_t dev, device_t child,
Prefer the uintXX_t to the u_intXX_t names.
2003-08-22 03:11:53 +00:00
int reg, uint32_t val, int width);
Return status for PCI methods '{enable,disable}_{io,busmaster}'. Reviewed by: imp
2003-04-16 03:15:08 +00:00
int pci_enable_busmaster_method(device_t dev, device_t child);
int pci_disable_busmaster_method(device_t dev, device_t child);
int pci_enable_io_method(device_t dev, device_t child, int space);
int pci_disable_io_method(device_t dev, device_t child, int space);
Add a new method PCI_FIND_EXTCAP() to the pci bus interface that is used to search for a specific extended capability. If the specified capability is found for the given device, then the function returns success and optionally returns the offset of that capability. If the capability is not found, the function returns an error.
2005-12-20 19:57:47 +00:00
int pci_find_extcap_method(device_t dev, device_t child,
int capability, int *capreg);
First cut at MI support for PCI Message Signalled Interrupts (MSI): - Add 3 new functions to the pci_if interface along with suitable wrappers to provide the device driver visible API: - pci_alloc_msi(dev, int *count) backed by PCI_ALLOC_MSI(). '*count' here is an in and out parameter. The driver stores the desired number of messages in '*count' before calling the function. On success, '*count' holds the number of messages allocated to the device. Also on success, the driver can access the messages as SYS_RES_IRQ resources starting at rid 1. Note that the legacy INTx interrupt resource will not be available when using MSI. Note that this function will allocate either MSI or MSI-X messages depending on the devices capabilities and the 'hw.pci.enable_msix' and 'hw.pci.enable_msi' tunables. Also note that the driver should activate the memory resource that holds the MSI-X table and pending bit array (PBA) before calling this function if the device supports MSI-X. - pci_release_msi(dev) backed by PCI_RELEASE_MSI(). This function releases the messages allocated for this device. All of the SYS_RES_IRQ resources need to be released for this function to succeed. - pci_msi_count(dev) backed by PCI_MSI_COUNT(). This function returns the maximum number of MSI or MSI-X messages supported by this device. MSI-X is preferred if present, but this function will honor the 'hw.pci.enable_msix' and 'hw.pci.enable_msi' tunables. This function should return the largest value that pci_alloc_msi() can return (assuming the MD code is able to allocate sufficient backing resources for all of the messages). - Add default implementations for these 3 methods to the pci_driver generic PCI bus driver. (The various other PCI bus drivers such as for ACPI and OFW will inherit these default implementations.) This default implementation depends on 4 new pcib_if methods that bubble up through the PCI bridges to the MD code to allocate IRQ values and perform any needed MD setup code needed: - PCIB_ALLOC_MSI() attempts to allocate a group of MSI messages. - PCIB_RELEASE_MSI() releases a group of MSI messages. - PCIB_ALLOC_MSIX() attempts to allocate a single MSI-X message. - PCIB_RELEASE_MSIX() releases a single MSI-X message. - Add default implementations for these 4 methods that just pass the request up to the parent bus's parent bridge driver and use the default implementation in the various MI PCI bridge drivers. - Add MI functions for use by MD code when managing MSI and MSI-X interrupts: - pci_enable_msi(dev, address, data) programs the MSI capability address and data registers for a group of MSI messages - pci_enable_msix(dev, index, address, data) initializes a single MSI-X message in the MSI-X table - pci_mask_msix(dev, index) masks a single MSI-X message - pci_unmask_msix(dev, index) unmasks a single MSI-X message - pci_pending_msix(dev, index) returns true if the specified MSI-X message is currently pending - Save the MSI capability address and data registers in the pci_cfgreg block in a PCI devices ivars and restore the values when a device is resumed. Note that the MSI-X table is not currently restored during resume. - Add constants for MSI-X register offsets and fields. - Record interesting data about any MSI-X capability blocks we come across in the pci_cfgreg block in the ivars for PCI devices. Tested on: em (i386, MSI), bce (amd64/i386, MSI), mpt (amd64, MSI-X) Reviewed by: scottl, grehan, jfv MFC after: 2 months
2006-11-13 21:47:30 +00:00
int pci_alloc_msi_method(device_t dev, device_t child, int *count);
Expand the MSI/MSI-X API to address some deficiencies in the MSI-X support. - First off, device drivers really do need to know if they are allocating MSI or MSI-X messages. MSI requires allocating powerof2() messages for example where MSI-X does not. To address this, split out the MSI-X support from pci_msi_count() and pci_alloc_msi() into new driver-visible functions pci_msix_count() and pci_alloc_msix(). As a result, pci_msi_count() now just returns a count of the max supported MSI messages for the device, and pci_alloc_msi() only tries to allocate MSI messages. To get a count of the max supported MSI-X messages, use pci_msix_count(). To allocate MSI-X messages, use pci_alloc_msix(). pci_release_msi() still handles both MSI and MSI-X messages, however. As a result of this change, drivers using the existing API will only use MSI messages and will no longer try to use MSI-X messages. - Because MSI-X allows for each message to have its own data and address values (and thus does not require all of the messages to have their MD vectors allocated as a group), some devices allow for "sparse" use of MSI-X message slots. For example, if a device supports 8 messages but the OS is only able to allocate 2 messages, the device may make the best use of 2 IRQs if it enables the messages at slots 1 and 4 rather than default of using the first N slots (or indicies) at 1 and 2. To support this, add a new pci_remap_msix() function that a driver may call after a successful pci_alloc_msix() (but before allocating any of the SYS_RES_IRQ resources) to allow the allocated IRQ resources to be assigned to different message indices. For example, from the earlier example, after pci_alloc_msix() returned a value of 2, the driver would call pci_remap_msix() passing in array of integers { 1, 4 } as the new message indices to use. The rid's for the SYS_RES_IRQ resources will always match the message indices. Thus, after the call to pci_remap_msix() the driver would be able to access the first message in slot 1 at SYS_RES_IRQ rid 1, and the second message at slot 4 at SYS_RES_IRQ rid 4. Note that the message slots/indices are 1-based rather than 0-based so that they will always correspond to the rid values (SYS_RES_IRQ rid 0 is reserved for the legacy INTx interrupt). To support this API, a new PCIB_REMAP_MSIX() method was added to the pcib interface to change the message index for a single IRQ. Tested by: scottl
2007-01-22 21:48:44 +00:00
int pci_alloc_msix_method(device_t dev, device_t child, int *count);
int pci_remap_msix_method(device_t dev, device_t child,
u_int *indices);
First cut at MI support for PCI Message Signalled Interrupts (MSI): - Add 3 new functions to the pci_if interface along with suitable wrappers to provide the device driver visible API: - pci_alloc_msi(dev, int *count) backed by PCI_ALLOC_MSI(). '*count' here is an in and out parameter. The driver stores the desired number of messages in '*count' before calling the function. On success, '*count' holds the number of messages allocated to the device. Also on success, the driver can access the messages as SYS_RES_IRQ resources starting at rid 1. Note that the legacy INTx interrupt resource will not be available when using MSI. Note that this function will allocate either MSI or MSI-X messages depending on the devices capabilities and the 'hw.pci.enable_msix' and 'hw.pci.enable_msi' tunables. Also note that the driver should activate the memory resource that holds the MSI-X table and pending bit array (PBA) before calling this function if the device supports MSI-X. - pci_release_msi(dev) backed by PCI_RELEASE_MSI(). This function releases the messages allocated for this device. All of the SYS_RES_IRQ resources need to be released for this function to succeed. - pci_msi_count(dev) backed by PCI_MSI_COUNT(). This function returns the maximum number of MSI or MSI-X messages supported by this device. MSI-X is preferred if present, but this function will honor the 'hw.pci.enable_msix' and 'hw.pci.enable_msi' tunables. This function should return the largest value that pci_alloc_msi() can return (assuming the MD code is able to allocate sufficient backing resources for all of the messages). - Add default implementations for these 3 methods to the pci_driver generic PCI bus driver. (The various other PCI bus drivers such as for ACPI and OFW will inherit these default implementations.) This default implementation depends on 4 new pcib_if methods that bubble up through the PCI bridges to the MD code to allocate IRQ values and perform any needed MD setup code needed: - PCIB_ALLOC_MSI() attempts to allocate a group of MSI messages. - PCIB_RELEASE_MSI() releases a group of MSI messages. - PCIB_ALLOC_MSIX() attempts to allocate a single MSI-X message. - PCIB_RELEASE_MSIX() releases a single MSI-X message. - Add default implementations for these 4 methods that just pass the request up to the parent bus's parent bridge driver and use the default implementation in the various MI PCI bridge drivers. - Add MI functions for use by MD code when managing MSI and MSI-X interrupts: - pci_enable_msi(dev, address, data) programs the MSI capability address and data registers for a group of MSI messages - pci_enable_msix(dev, index, address, data) initializes a single MSI-X message in the MSI-X table - pci_mask_msix(dev, index) masks a single MSI-X message - pci_unmask_msix(dev, index) unmasks a single MSI-X message - pci_pending_msix(dev, index) returns true if the specified MSI-X message is currently pending - Save the MSI capability address and data registers in the pci_cfgreg block in a PCI devices ivars and restore the values when a device is resumed. Note that the MSI-X table is not currently restored during resume. - Add constants for MSI-X register offsets and fields. - Record interesting data about any MSI-X capability blocks we come across in the pci_cfgreg block in the ivars for PCI devices. Tested on: em (i386, MSI), bce (amd64/i386, MSI), mpt (amd64, MSI-X) Reviewed by: scottl, grehan, jfv MFC after: 2 months
2006-11-13 21:47:30 +00:00
int pci_release_msi_method(device_t dev, device_t child);
int pci_msi_count_method(device_t dev, device_t child);
Expand the MSI/MSI-X API to address some deficiencies in the MSI-X support. - First off, device drivers really do need to know if they are allocating MSI or MSI-X messages. MSI requires allocating powerof2() messages for example where MSI-X does not. To address this, split out the MSI-X support from pci_msi_count() and pci_alloc_msi() into new driver-visible functions pci_msix_count() and pci_alloc_msix(). As a result, pci_msi_count() now just returns a count of the max supported MSI messages for the device, and pci_alloc_msi() only tries to allocate MSI messages. To get a count of the max supported MSI-X messages, use pci_msix_count(). To allocate MSI-X messages, use pci_alloc_msix(). pci_release_msi() still handles both MSI and MSI-X messages, however. As a result of this change, drivers using the existing API will only use MSI messages and will no longer try to use MSI-X messages. - Because MSI-X allows for each message to have its own data and address values (and thus does not require all of the messages to have their MD vectors allocated as a group), some devices allow for "sparse" use of MSI-X message slots. For example, if a device supports 8 messages but the OS is only able to allocate 2 messages, the device may make the best use of 2 IRQs if it enables the messages at slots 1 and 4 rather than default of using the first N slots (or indicies) at 1 and 2. To support this, add a new pci_remap_msix() function that a driver may call after a successful pci_alloc_msix() (but before allocating any of the SYS_RES_IRQ resources) to allow the allocated IRQ resources to be assigned to different message indices. For example, from the earlier example, after pci_alloc_msix() returned a value of 2, the driver would call pci_remap_msix() passing in array of integers { 1, 4 } as the new message indices to use. The rid's for the SYS_RES_IRQ resources will always match the message indices. Thus, after the call to pci_remap_msix() the driver would be able to access the first message in slot 1 at SYS_RES_IRQ rid 1, and the second message at slot 4 at SYS_RES_IRQ rid 4. Note that the message slots/indices are 1-based rather than 0-based so that they will always correspond to the rid values (SYS_RES_IRQ rid 0 is reserved for the legacy INTx interrupt). To support this API, a new PCIB_REMAP_MSIX() method was added to the pcib interface to change the message index for a single IRQ. Tested by: scottl
2007-01-22 21:48:44 +00:00
int pci_msix_count_method(device_t dev, device_t child);
Use the pci.c code wherever possible, rather than copying all the pci code into cardbus and s/pci/cardbus. This exposes a few pci_* functions that are now static. This work is similar to work Justin posted to the mobile list about a year or two ago, which I have neglected since then. This is a subset of his current work with the multiple inheritance newbus architecutre. When completed, that will eliminate the need for pci/pci_private.h. Similar work is needed for the cardbus_cis and pccard_cis code as well.
2002-02-27 05:09:14 +00:00
struct resource *pci_alloc_resource(device_t dev, device_t child,
int type, int *rid, u_long start, u_long end, u_long count,
u_int flags);
void pci_delete_resource(device_t dev, device_t child,
int type, int rid);
struct resource_list *pci_get_resource_list (device_t dev, device_t child);
Add 5th parameter to pci_read_device specifying the size of the object to create.
2002-03-13 16:32:11 +00:00
struct pci_devinfo *pci_read_device(device_t pcib, int b, int s, int f,
size_t size);
Use the pci.c code wherever possible, rather than copying all the pci code into cardbus and s/pci/cardbus. This exposes a few pci_* functions that are now static. This work is similar to work Justin posted to the mobile list about a year or two ago, which I have neglected since then. This is a subset of his current work with the multiple inheritance newbus architecutre. When completed, that will eliminate the need for pci/pci_private.h. Similar work is needed for the cardbus_cis and pccard_cis code as well.
2002-02-27 05:09:14 +00:00
void pci_print_verbose(struct pci_devinfo *dinfo);
int pci_freecfg(struct pci_devinfo *dinfo);
Move the pnp and location info into the common pci bus. Make all known pci busses implement this. Also minor comment smithing in cardbus. Fix copyright to this year with my name on it since I've been doing a lot to this file. Reviewed by: jhb
2003-02-17 21:20:35 +00:00
int pci_child_location_str_method(device_t cbdev, device_t child,
char *buf, size_t buflen);
int pci_child_pnpinfo_str_method(device_t cbdev, device_t child,
char *buf, size_t buflen);
Add a new PCI interface method, assign_interrupt, to determine the interrupt to be used for a device. This is intended solely for internal use of PCI bus implementations, and exists so that PCI bus drivers implementing special interrupt assignment methods which require additional work at the bus level to work right can be easily derived from the generic driver (or any other one) without resorting to hacks. It will be used in the sparc64 ofw_pcibus driver, which will be committed shortly. Make use of this method in the generic implementation, and add it to the method table of bus drivers derived from the PCI one. Reviewed by: imp, -hackers
2003-07-01 14:08:33 +00:00
int pci_assign_interrupt_method(device_t dev, device_t child);
Add pci_resume() to reestablish interrupt routing after suspend/resume. Especially after hibernation, interrupt routing went back to initial status on some machines.
2003-09-17 08:32:44 +00:00
int pci_resume(device_t dev);
Omnibus PCI commit: o Save and restore bars for suspend/resume as well as for D3->D0 transitions. o preallocate resources that the PCI devices use to avoid resource conflicts o lazy allocation of resources not allocated by the BIOS. o set unattached drivers to state D3. Set power state to D0 before probe/attach. Right now there's two special cases for this (display and memory devices) that need work in other areas of the tree. Please report any bugs to me.
2004-04-09 15:44:34 +00:00
int pci_suspend(device_t dev);
Expose pci_cfg_safe/restore for subclasses of pci to use.
2005-02-28 01:14:15 +00:00
void pci_cfg_restore(device_t, struct pci_devinfo *);
void pci_cfg_save(device_t, struct pci_devinfo *, int);
Various whitespace cleanups.
2006-11-07 18:55:51 +00:00
Use the pci.c code wherever possible, rather than copying all the pci code into cardbus and s/pci/cardbus. This exposes a few pci_* functions that are now static. This work is similar to work Justin posted to the mobile list about a year or two ago, which I have neglected since then. This is a subset of his current work with the multiple inheritance newbus architecutre. When completed, that will eliminate the need for pci/pci_private.h. Similar work is needed for the cardbus_cis and pccard_cis code as well.
2002-02-27 05:09:14 +00:00
#endif /* _PCI_PRIVATE_H_ */
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