e4116e931c
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)
73 lines
2.5 KiB
C
73 lines
2.5 KiB
C
/*-
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* Copyright (c) 2000 Michael Smith
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* Copyright (c) 2000 BSDi
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _ACPI_PCIBVAR_H_
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#define _ACPI_PCIBVAR_H_
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int acpi_pcib_attach(device_t bus, ACPI_BUFFER *prt, int busno);
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int acpi_pcib_route_interrupt(device_t pcib, device_t dev, int pin);
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int acpi_pcib_resume(device_t dev);
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#define MAX_POSSIBLE_INTERRUPTS 16
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#define MAX_ISA_INTERRUPTS 16
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#define MAX_ACPI_INTERRUPTS 255
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struct acpi_pci_link_entry {
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TAILQ_ENTRY(acpi_pci_link_entry) links;
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ACPI_HANDLE handle;
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UINT8 current_irq;
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UINT8 initial_irq;
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ACPI_RESOURCE possible_resources;
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UINT8 number_of_interrupts;
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UINT8 interrupts[MAX_POSSIBLE_INTERRUPTS];
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UINT8 sorted_irq[MAX_POSSIBLE_INTERRUPTS];
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int references;
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int priority;
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int flags;
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#define ACPI_LINK_NONE 0
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#define ACPI_LINK_ROUTED (1 << 0)
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};
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struct acpi_prt_entry {
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TAILQ_ENTRY(acpi_prt_entry) links;
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device_t pcidev;
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int busno;
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ACPI_PCI_ROUTING_TABLE prt;
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ACPI_HANDLE prt_source;
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struct acpi_pci_link_entry *pci_link;
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};
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int acpi_pci_link_config(device_t pcib, ACPI_BUFFER *prt, int busno);
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int acpi_pci_link_resume(device_t pcib);
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struct acpi_prt_entry *acpi_pci_find_prt(device_t pcibdev, device_t dev,
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int pin);
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int acpi_pci_link_route(device_t dev, struct acpi_prt_entry *prt);
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#endif
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