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freebsd-dev/sys/dev/acpica/acpi_pcibvar.h

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Overhaul the ACPI PCI bridge driver a bit: - Add an ACPI PCI-PCI bridge driver (the previous driver just handled Host-PCI bridges) that is a PCI driver that is a subclass of the generic PCI-PCI bridge driver. It overrides probe, attach, read_ivar, and pci_route_interrupt. - The probe routine only succeeds if our parent is an ACPI PCI bus which we test for by seeing if we can read our ACPI_HANDLE as an ivar. - The attach routine saves a copy of our handle and calls the new acpi_pcib_attach_common() function described below. - The read_ivar routine handles normal PCI-PCI bridge ivars and adds an ivar to return the ACPI_HANDLE of the bus this bridge represents. - The route_interrupt routine fetches the _PRT (PCI Interrupt Routing Table) from the bridge device's softc and passes it off to acpi_pcib_route_interrupt() to route the interrupt. - Split the old ACPI Host-PCI bridge driver into two pieces. Part of the attach routine and most of the route_interrupt routine remain in acpi_pcib.c and are shared by both ACPI PCI bridge drivers. - The attach routine verifies the PCI bridge is present, reads in the _PRT for the bridge, and attaches the child PCI bus. - The route_interrupt routine uses the passed in _PRT to route a PCI interrupt. The rest of the driver is the ACPI Host-PCI bridge specific bits that live in acpi_pcib_acpi.c. - We no longer duplicate pcib_maxslots but use it directly. - The driver now uses the pcib devclass instead of its own devclass. This means that PCI busses are now only children of pcib devices. - Allow the ACPI_HANDLE for the child PCI bus to be read as an ivar of the child bus. - Fetch the _PRT for routing PCI interrupts directly from our softc instead of walking the devclass to find ourself and then fetch our own softc. With this change and the new ACPI PCI bus driver, ACPI can now properly route interrupts for devices behind PCI-PCI bridges. That is, the Itanium2 with like 10 PCI busses can now boot ok and route all the PCI interrupts. Hopefully this will also fix problems people are having with CardBus bridges behind PCI-PCI bridges not properly routing interrupts when ACPI is used. Tested on: i386, ia64
2002-08-26 18:30:27 +00:00
/*-
* Copyright (c) 2000 Michael Smith
* 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, 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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 _ACPI_PCIBVAR_H_
#define _ACPI_PCIBVAR_H_
Protect against multiple includes and use _KERNEL to protect the PCI fns.
2005-02-28 05:39:34 +00:00
#ifdef _KERNEL
- Remove some no longer used constants. - Sort function prototypes.
2004-11-23 22:30:03 +00:00
void acpi_pci_link_add_reference(device_t dev, int index, device_t pcib,
int slot, int pin);
int acpi_pci_link_route_interrupt(device_t dev, int index);
Overhaul the ACPI PCI bridge driver a bit: - Add an ACPI PCI-PCI bridge driver (the previous driver just handled Host-PCI bridges) that is a PCI driver that is a subclass of the generic PCI-PCI bridge driver. It overrides probe, attach, read_ivar, and pci_route_interrupt. - The probe routine only succeeds if our parent is an ACPI PCI bus which we test for by seeing if we can read our ACPI_HANDLE as an ivar. - The attach routine saves a copy of our handle and calls the new acpi_pcib_attach_common() function described below. - The read_ivar routine handles normal PCI-PCI bridge ivars and adds an ivar to return the ACPI_HANDLE of the bus this bridge represents. - The route_interrupt routine fetches the _PRT (PCI Interrupt Routing Table) from the bridge device's softc and passes it off to acpi_pcib_route_interrupt() to route the interrupt. - Split the old ACPI Host-PCI bridge driver into two pieces. Part of the attach routine and most of the route_interrupt routine remain in acpi_pcib.c and are shared by both ACPI PCI bridge drivers. - The attach routine verifies the PCI bridge is present, reads in the _PRT for the bridge, and attaches the child PCI bus. - The route_interrupt routine uses the passed in _PRT to route a PCI interrupt. The rest of the driver is the ACPI Host-PCI bridge specific bits that live in acpi_pcib_acpi.c. - We no longer duplicate pcib_maxslots but use it directly. - The driver now uses the pcib devclass instead of its own devclass. This means that PCI busses are now only children of pcib devices. - Allow the ACPI_HANDLE for the child PCI bus to be read as an ivar of the child bus. - Fetch the _PRT for routing PCI interrupts directly from our softc instead of walking the devclass to find ourself and then fetch our own softc. With this change and the new ACPI PCI bus driver, ACPI can now properly route interrupts for devices behind PCI-PCI bridges. That is, the Itanium2 with like 10 PCI busses can now boot ok and route all the PCI interrupts. Hopefully this will also fix problems people are having with CardBus bridges behind PCI-PCI bridges not properly routing interrupts when ACPI is used. Tested on: i386, ia64
2002-08-26 18:30:27 +00:00
int acpi_pcib_attach(device_t bus, ACPI_BUFFER *prt, int busno);
Rework the ACPI PCI link code. - Use a new-bus device driver for the ACPI PCI link devices. The devices are called pci_linkX. The driver includes suspend/resume support so that the ACPI bridge drivers no longer have to poke the links to get them to handle suspend/resume. Also, the code to handle which IRQs a link is routed to and choosing an IRQ when a link is not already routed is all contained in the link driver. The PCI bridge drivers now ask the link driver which IRQ to use once they determine that a _PRT entry does not use a hardwired interrupt number. - The new link driver includes support for multiple IRQ resources per link device as well as preserving any non-IRQ resources when adjusting the IRQ that a link is routed to. - The entire approach to routing when using a link device is now link-centric rather than pci bus/device/pin specific. Thus, when using a tunable to override the default IRQ settings, one now uses a single tunable to route an entire link rather than routing a single device that uses the link (which has great foot-shooting potential if the user tries to route the same link to two different IRQs using two different pci bus/device/pin hints). For example, to adjust the IRQ that \_SB_.LNKA uses, one would set 'hw.pci.link.LNKA.irq=10' from the loader. - As a side effect of having the link driver, unused link devices will now be disabled when they are probed. - The algorithm for choosing an IRQ for a link that doesn't already have an IRQ assigned is now much closer to the one used in $PIR routing. When a link is routed via an ISA IRQ, only known-good IRQs that the BIOS has already used are used for routing instead of using probabilities to guess at which IRQs are probably not used by an ISA device. One change from $PIR is that the SCI is always considered a viable ISA IRQ, so that if the BIOS does not setup any IRQs the kernel will degenerate to routing all interrupts over the SCI. For non ISA IRQs, interrupts are picked from the possible pool using a simplistic weighting algorithm. Tested by: ru, scottl, others on acpi@ Reviewed by: njl
2004-11-23 22:26:44 +00:00
int acpi_pcib_route_interrupt(device_t pcib, device_t dev, int pin,
ACPI_BUFFER *prtbuf);
Re-work ACPI PCI IRQ routing (_PRT, link devices). The old approach was incomplete in that the PRT routing was not aware of link programming. Fix this by doing all routing through the link devices. The new algorithm for setting up links is: 1. Read _CRS to get current setting. If invalid (not in _PRS), then set to 0. 2. Attempt to call _DIS on the link. If successful, mark the link as not routed. Otherwise, assume it still is. Then when a routing request occurs: 3. Update weights for all IRQs 4. Attempt to route the initial IRQ if valid 5. If that fails, walk through the sorted list, attempting to route IRQs. 6. Configure the trigger/polarity based on _PRS. Other changes: * Add acpi_pci_find_prt() to look up the PRT entry for a given device and acpi_pci_link_route() to select/route the best IRQ for it. * Remove duplicated code in acpi_pcib_route_interrupt() that picked the first IRQ from _PRS. * Remove unneeded arguments from acpi_pcib_resume() and friends. * Ignore _STA on link devices but report if it seems strange. * Add a prt_source handle to the PRT structure since the ACPI struct ACPI_PCI_ROUTING_TABLE uses a fixed-size entry for it. We'll need to dynamically size this object if we want to use it the same way ACPI-CA does. Null-terminate the source. Tested by: Luo Hong <luohong99_at_mails.tsinghua.edu.cn>, Jeffrey Katcher <jmkatcher_at_yahoo.com> Info from: jhb, Len Brown (Intel)
2004-08-11 14:52:50 +00:00
int acpi_pcib_resume(device_t dev);
Protect against multiple includes and use _KERNEL to protect the PCI fns.
2005-02-28 05:39:34 +00:00
#endif /* _KERNEL */
Re-work ACPI PCI IRQ routing (_PRT, link devices). The old approach was incomplete in that the PRT routing was not aware of link programming. Fix this by doing all routing through the link devices. The new algorithm for setting up links is: 1. Read _CRS to get current setting. If invalid (not in _PRS), then set to 0. 2. Attempt to call _DIS on the link. If successful, mark the link as not routed. Otherwise, assume it still is. Then when a routing request occurs: 3. Update weights for all IRQs 4. Attempt to route the initial IRQ if valid 5. If that fails, walk through the sorted list, attempting to route IRQs. 6. Configure the trigger/polarity based on _PRS. Other changes: * Add acpi_pci_find_prt() to look up the PRT entry for a given device and acpi_pci_link_route() to select/route the best IRQ for it. * Remove duplicated code in acpi_pcib_route_interrupt() that picked the first IRQ from _PRS. * Remove unneeded arguments from acpi_pcib_resume() and friends. * Ignore _STA on link devices but report if it seems strange. * Add a prt_source handle to the PRT structure since the ACPI struct ACPI_PCI_ROUTING_TABLE uses a fixed-size entry for it. We'll need to dynamically size this object if we want to use it the same way ACPI-CA does. Null-terminate the source. Tested by: Luo Hong <luohong99_at_mails.tsinghua.edu.cn>, Jeffrey Katcher <jmkatcher_at_yahoo.com> Info from: jhb, Len Brown (Intel)
2004-08-11 14:52:50 +00:00
Protect against multiple includes and use _KERNEL to protect the PCI fns.
2005-02-28 05:39:34 +00:00
#endif /* !_ACPI_PCIBVAR_H_ */
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