2008-10-23 13:26:29 +08:00
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#ifndef _ASM_X86_PCI_H
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#define _ASM_X86_PCI_H
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2007-10-13 05:07:23 +08:00
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#include <linux/mm.h> /* for struct page */
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <asm/scatterlist.h>
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#include <asm/io.h>
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2010-10-07 04:12:28 +08:00
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#include <asm/x86_init.h>
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2007-10-13 05:07:23 +08:00
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#ifdef __KERNEL__
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struct pci_sysdata {
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int domain; /* PCI domain */
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int node; /* NUMA node */
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ACPI / PCI: Set root bridge ACPI handle in advance
The ACPI handles of PCI root bridges need to be known to
acpi_bind_one(), so that it can create the appropriate
"firmware_node" and "physical_node" files for them, but currently
the way it gets to know those handles is not exactly straightforward
(to put it lightly).
This is how it works, roughly:
1. acpi_bus_scan() finds the handle of a PCI root bridge,
creates a struct acpi_device object for it and passes that
object to acpi_pci_root_add().
2. acpi_pci_root_add() creates a struct acpi_pci_root object,
populates its "device" field with its argument's address
(device->handle is the ACPI handle found in step 1).
3. The struct acpi_pci_root object created in step 2 is passed
to pci_acpi_scan_root() and used to get resources that are
passed to pci_create_root_bus().
4. pci_create_root_bus() creates a struct pci_host_bridge object
and passes its "dev" member to device_register().
5. platform_notify(), which for systems with ACPI is set to
acpi_platform_notify(), is called.
So far, so good. Now it starts to be "interesting".
6. acpi_find_bridge_device() is used to find the ACPI handle of
the given device (which is the PCI root bridge) and executes
acpi_pci_find_root_bridge(), among other things, for the
given device object.
7. acpi_pci_find_root_bridge() uses the name (sic!) of the given
device object to extract the segment and bus numbers of the PCI
root bridge and passes them to acpi_get_pci_rootbridge_handle().
8. acpi_get_pci_rootbridge_handle() browses the list of ACPI PCI
root bridges and finds the one that matches the given segment
and bus numbers. Its handle is then used to initialize the
ACPI handle of the PCI root bridge's device object by
acpi_bind_one(). However, this is *exactly* the ACPI handle we
started with in step 1.
Needless to say, this is quite embarassing, but it may be avoided
thanks to commit f3fd0c8 (ACPI: Allow ACPI handles of devices to be
initialized in advance), which makes it possible to initialize the
ACPI handle of a device before passing it to device_register().
Accordingly, add a new __weak routine, pcibios_root_bridge_prepare(),
defaulting to an empty implementation that can be replaced by the
interested architecutres (x86 and ia64 at the moment) with functions
that will set the root bridge's ACPI handle before its dev member is
passed to device_register(). Make both x86 and ia64 provide such
implementations of pcibios_root_bridge_prepare() and remove
acpi_pci_find_root_bridge() and acpi_get_pci_rootbridge_handle() that
aren't necessary any more.
Included is a fix for breakage on systems with non-ACPI PCI host
bridges from Bjorn Helgaas.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2013-01-10 05:33:37 +08:00
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#ifdef CONFIG_ACPI
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void *acpi; /* ACPI-specific data */
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#endif
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2007-10-13 05:07:23 +08:00
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#ifdef CONFIG_X86_64
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2008-03-23 16:03:04 +08:00
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void *iommu; /* IOMMU private data */
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2007-10-13 05:07:23 +08:00
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#endif
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};
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2008-05-12 21:43:37 +08:00
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extern int pci_routeirq;
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2008-06-11 22:35:14 +08:00
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extern int noioapicquirk;
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2008-07-15 19:48:55 +08:00
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extern int noioapicreroute;
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2008-05-12 21:43:37 +08:00
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2007-10-13 05:07:23 +08:00
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/* scan a bus after allocating a pci_sysdata for it */
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x86: get mp_bus_to_node early
Currently, on an amd k8 system with multi ht chains, the numa_node of
pci devices under /sys/devices/pci0000:80/* is always 0, even if that
chain is on node 1 or 2 or 3.
Workaround: pcibus_to_node(bus) is used when we want to get the node that
pci_device is on.
In struct device, we already have numa_node member, and we could use
dev_to_node()/set_dev_node() to get and set numa_node in the device.
set_dev_node is called in pci_device_add() with pcibus_to_node(bus),
and pcibus_to_node uses bus->sysdata for nodeid.
The problem is when pci_add_device is called, bus->sysdata is not assigned
correct nodeid yet. The result is that numa_node will always be 0.
pcibios_scan_root and pci_scan_root could take sysdata. So we need to get
mp_bus_to_node mapping before these two are called, and thus
get_mp_bus_to_node could get correct node for sysdata in root bus.
In scanning of the root bus, all child busses will take parent bus sysdata.
So all pci_device->dev.numa_node will be assigned correctly and automatically.
Later we could use dev_to_node(&pci_dev->dev) to get numa_node, and we
could also could make other bus specific device get the correct numa_node
too.
This is an updated version of pci_sysdata and Jeff's pci_domain patch.
[ mingo@elte.hu: build fix ]
Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-19 19:20:09 +08:00
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extern struct pci_bus *pci_scan_bus_on_node(int busno, struct pci_ops *ops,
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int node);
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2007-10-13 05:07:23 +08:00
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extern struct pci_bus *pci_scan_bus_with_sysdata(int busno);
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2010-08-18 00:15:24 +08:00
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#ifdef CONFIG_PCI
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#ifdef CONFIG_PCI_DOMAINS
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2007-10-13 05:07:23 +08:00
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static inline int pci_domain_nr(struct pci_bus *bus)
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{
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struct pci_sysdata *sd = bus->sysdata;
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return sd->domain;
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}
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static inline int pci_proc_domain(struct pci_bus *bus)
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{
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return pci_domain_nr(bus);
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}
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2010-08-18 00:15:24 +08:00
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#endif
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2007-10-13 05:07:23 +08:00
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/* Can be used to override the logic in pci_scan_bus for skipping
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already-configured bus numbers - to be used for buggy BIOSes
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or architectures with incomplete PCI setup by the loader */
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extern unsigned int pcibios_assign_all_busses(void);
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2009-08-29 22:24:51 +08:00
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extern int pci_legacy_init(void);
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# ifdef CONFIG_ACPI
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# define x86_default_pci_init pci_acpi_init
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# else
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# define x86_default_pci_init pci_legacy_init
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# endif
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2007-10-13 05:07:23 +08:00
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#else
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2009-08-29 22:24:51 +08:00
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# define pcibios_assign_all_busses() 0
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# define x86_default_pci_init NULL
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2007-10-13 05:07:23 +08:00
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#endif
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extern unsigned long pci_mem_start;
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#define PCIBIOS_MIN_IO 0x1000
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#define PCIBIOS_MIN_MEM (pci_mem_start)
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#define PCIBIOS_MIN_CARDBUS_IO 0x4000
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2010-11-17 05:31:26 +08:00
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extern int pcibios_enabled;
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2007-10-13 05:07:23 +08:00
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void pcibios_config_init(void);
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2008-03-23 16:03:04 +08:00
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struct pci_bus *pcibios_scan_root(int bus);
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2007-10-13 05:07:23 +08:00
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void pcibios_set_master(struct pci_dev *dev);
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void pcibios_penalize_isa_irq(int irq, int active);
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struct irq_routing_table *pcibios_get_irq_routing_table(void);
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int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq);
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#define HAVE_PCI_MMAP
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extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
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2008-03-23 16:03:04 +08:00
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enum pci_mmap_state mmap_state,
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int write_combine);
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2007-10-13 05:07:23 +08:00
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#ifdef CONFIG_PCI
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2008-01-30 20:30:16 +08:00
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extern void early_quirks(void);
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2007-10-13 05:07:23 +08:00
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static inline void pci_dma_burst_advice(struct pci_dev *pdev,
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enum pci_dma_burst_strategy *strat,
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unsigned long *strategy_parameter)
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{
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*strat = PCI_DMA_BURST_INFINITY;
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*strategy_parameter = ~0UL;
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}
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2008-01-30 20:30:16 +08:00
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#else
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static inline void early_quirks(void) { }
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2007-10-13 05:07:23 +08:00
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#endif
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2008-12-17 04:17:36 +08:00
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extern void pci_iommu_alloc(void);
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2010-10-07 04:12:28 +08:00
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#ifdef CONFIG_PCI_MSI
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/* implemented in arch/x86/kernel/apic/io_apic. */
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2012-09-26 18:44:38 +08:00
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struct msi_desc;
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2010-10-07 04:12:28 +08:00
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int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
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void native_teardown_msi_irq(unsigned int irq);
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2011-12-17 06:38:18 +08:00
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void native_restore_msi_irqs(struct pci_dev *dev, int irq);
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2012-09-26 18:44:38 +08:00
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int setup_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc,
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unsigned int irq_base, unsigned int irq_offset);
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2010-10-07 04:12:28 +08:00
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#else
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#define native_setup_msi_irqs NULL
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#define native_teardown_msi_irq NULL
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#endif
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2009-01-19 08:31:00 +08:00
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2009-04-02 21:55:55 +08:00
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#define PCI_DMA_BUS_IS_PHYS (dma_ops->is_phys)
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#endif /* __KERNEL__ */
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#ifdef CONFIG_X86_64
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2012-10-03 01:01:25 +08:00
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#include <asm/pci_64.h>
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2007-10-13 05:07:23 +08:00
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#endif
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/* implement the pci_ DMA API in terms of the generic device dma_ one */
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#include <asm-generic/pci-dma-compat.h>
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/* generic pci stuff */
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#include <asm-generic/pci.h>
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2009-04-24 11:48:32 +08:00
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#define PCIBIOS_MAX_MEM_32 0xffffffff
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2007-10-13 05:07:23 +08:00
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2008-01-30 20:30:38 +08:00
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#ifdef CONFIG_NUMA
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/* Returns the node based on pci bus */
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2008-12-26 19:53:38 +08:00
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static inline int __pcibus_to_node(const struct pci_bus *bus)
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2008-01-30 20:30:38 +08:00
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{
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2008-12-26 19:53:38 +08:00
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const struct pci_sysdata *sd = bus->sysdata;
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2008-01-30 20:30:38 +08:00
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return sd->node;
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}
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2007-10-13 05:07:23 +08:00
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2008-12-26 19:53:38 +08:00
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static inline const struct cpumask *
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cpumask_of_pcibus(const struct pci_bus *bus)
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{
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2009-09-18 18:41:10 +08:00
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int node;
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node = __pcibus_to_node(bus);
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return (node == -1) ? cpu_online_mask :
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cpumask_of_node(node);
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2008-12-26 19:53:38 +08:00
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}
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2008-01-30 20:30:38 +08:00
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#endif
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2007-10-13 05:07:23 +08:00
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2012-12-06 05:33:26 +08:00
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struct pci_setup_rom {
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struct setup_data data;
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uint16_t vendor;
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uint16_t devid;
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uint64_t pcilen;
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unsigned long segment;
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unsigned long bus;
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unsigned long device;
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unsigned long function;
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uint8_t romdata[0];
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};
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2008-10-23 13:26:29 +08:00
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#endif /* _ASM_X86_PCI_H */
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