![Linus Torvalds](/assets/img/avatar_default.png)
Resource management Add support for Enhanced Allocation devices (Sean O. Stalley) Add Enhanced Allocation register entries (Sean O. Stalley) Handle IORESOURCE_PCI_FIXED when sizing resources (David Daney) Handle IORESOURCE_PCI_FIXED when assigning resources (David Daney) Handle Enhanced Allocation capability for SR-IOV devices (David Daney) Clear IORESOURCE_UNSET when reverting to firmware-assigned address (Bjorn Helgaas) Make Enhanced Allocation bitmasks more obvious (Bjorn Helgaas) Expand Enhanced Allocation BAR output (Bjorn Helgaas) Add of_pci_check_probe_only to parse "linux,pci-probe-only" (Marc Zyngier) Fix lookup of linux,pci-probe-only property (Marc Zyngier) Add sparc mem64 resource parsing for root bus (Yinghai Lu) PCI device hotplug pciehp: Queue power work requests in dedicated function (Guenter Roeck) Driver binding Add builtin_pci_driver() to avoid registration boilerplate (Paul Gortmaker) Virtualization Set SR-IOV NumVFs to zero after enumeration (Alexander Duyck) Remove redundant validation of SR-IOV offset/stride registers (Alexander Duyck) Remove VFs in reverse order if virtfn_add() fails (Alexander Duyck) Reorder pcibios_sriov_disable() (Alexander Duyck) Wait 1 second between disabling VFs and clearing NumVFs (Alexander Duyck) Fix sriov_enable() error path for pcibios_enable_sriov() failures (Alexander Duyck) Enable SR-IOV ARI Capable Hierarchy before reading TotalVFs (Ben Shelton) Don't try to restore VF BARs (Wei Yang) MSI Don't alloc pcibios-irq when MSI is enabled (Joerg Roedel) Add msi_controller setup_irqs() method for special multivector setup (Lucas Stach) Export all remapped MSIs to sysfs attributes (Romain Bezut) Disable MSI on SiS 761 (Ondrej Zary) AER Clear error status registers during enumeration and restore (Taku Izumi) Generic host bridge driver Fix lookup of linux,pci-probe-only property (Marc Zyngier) Allow multiple hosts with different map_bus() methods (David Daney) Pass starting bus number to pci_scan_root_bus() (David Daney) Fix address window calculation for non-zero starting bus (David Daney) Altera host bridge driver Add msi.h to ARM Kbuild (Ley Foon Tan) Add Altera PCIe host controller driver (Ley Foon Tan) Add Altera PCIe MSI driver (Ley Foon Tan) APM X-Gene host bridge driver Remove msi_controller assignment (Duc Dang) Broadcom iProc host bridge driver Fix header comment "Corporation" misspelling (Florian Fainelli) Fix code comment to match code (Ray Jui) Remove unused struct iproc_pcie.irqs[] (Ray Jui) Call pci_fixup_irqs() for ARM64 as well as ARM (Ray Jui) Fix PCIe reset logic (Ray Jui) Improve link detection logic (Ray Jui) Update PCIe device tree bindings (Ray Jui) Add outbound mapping support (Ray Jui) Freescale i.MX6 host bridge driver Return real error code from imx6_add_pcie_port() (Fabio Estevam) Add PCIE_PHY_RX_ASIC_OUT_VALID definition (Fabio Estevam) Freescale Layerscape host bridge driver Remove ls_pcie_establish_link() (Minghuan Lian) Ignore PCIe controllers in Endpoint mode (Minghuan Lian) Factor out SCFG related function (Minghuan Lian) Update ls_add_pcie_port() (Minghuan Lian) Remove unused fields from struct ls_pcie (Minghuan Lian) Add support for LS1043a and LS2080a (Minghuan Lian) Add ls_pcie_msi_host_init() (Minghuan Lian) HiSilicon host bridge driver Add HiSilicon SoC Hip05 PCIe driver (Zhou Wang) Marvell MVEBU host bridge driver Return zero for reserved or unimplemented config space (Russell King) Use exact config access size; don't read/modify/write (Russell King) Use of_get_available_child_count() (Russell King) Use for_each_available_child_of_node() to walk child nodes (Russell King) Report full node name when reporting a DT error (Russell King) Use port->name rather than "PCIe%d.%d" (Russell King) Move port parsing and resource claiming to separate function (Russell King) Fix memory leaks and refcount leaks (Russell King) Split port parsing and resource claiming from port setup (Russell King) Use gpio_set_value_cansleep() (Russell King) Use devm_kcalloc() to allocate an array (Russell King) Use gpio_desc to carry around gpio (Russell King) Improve clock/reset handling (Russell King) Add PCI Express root complex capability block (Russell King) Remove code restricting accesses to slot 0 (Russell King) NVIDIA Tegra host bridge driver Wrap static pgprot_t initializer with __pgprot() (Ard Biesheuvel) Renesas R-Car host bridge driver Build pci-rcar-gen2.c only on ARM (Geert Uytterhoeven) Build pcie-rcar.c only on ARM (Geert Uytterhoeven) Make PCI aware of the I/O resources (Phil Edworthy) Remove dependency on ARM-specific struct hw_pci (Phil Edworthy) Set root bus nr to that provided in DT (Phil Edworthy) Fix I/O offset for multiple host bridges (Phil Edworthy) ST Microelectronics SPEAr13xx host bridge driver Fix dw_pcie_cfg_read/write() usage (Gabriele Paoloni) Synopsys DesignWare host bridge driver Make "clocks" and "clock-names" optional DT properties (Bhupesh Sharma) Use exact access size in dw_pcie_cfg_read() (Gabriele Paoloni) Simplify dw_pcie_cfg_read/write() interfaces (Gabriele Paoloni) Require config accesses to be naturally aligned (Gabriele Paoloni) Make "num-lanes" an optional DT property (Gabriele Paoloni) Move calculation of bus addresses to DRA7xx (Gabriele Paoloni) Replace ARM pci_sys_data->align_resource with global function pointer (Gabriele Paoloni) Factor out MSI msg setup (Lucas Stach) Implement multivector MSI IRQ setup (Lucas Stach) Make get_msi_addr() return phys_addr_t, not u32 (Lucas Stach) Set up high part of MSI target address (Lucas Stach) Fix PORT_LOGIC_LINK_WIDTH_MASK (Zhou Wang) Revert "PCI: designware: Program ATU with untranslated address" (Zhou Wang) Use of_pci_get_host_bridge_resources() to parse DT (Zhou Wang) Make driver arch-agnostic (Zhou Wang) Miscellaneous Make x86 pci_subsys_init() static (Alexander Kuleshov) Turn off Request Attributes to avoid Chelsio T5 Completion erratum (Hariprasad Shenai) -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJWPM9aAAoJEFmIoMA60/r89f8QALFMHegqKk5M08ZcCaG7unLF 5U5t88y6KF/kNYF6HOqLQiHh79U3ToU5HdrNaAtutr0UnvgbFC2WulLqKYgLiq6Y YJnwR3EfgGmdG7DKAVAXq19+nc2hgTPAEe8sciU7HKlTbqQmGj6//y3sQULGNLx3 zur0C33DCtrDgKDP7to273lkHO8Vl0YuLzyqwt0ePCMNcXR0h1dK8QxSTjuXBxaR c+T1V1Hw64MTxLz3xJd1/1ipy32u+9LnqqcdRz0zRq6qi48G9ch/i4Z6DHa8kTbj DUZrrTYKILQ2TcjcZSBmTueX11Z1Xa4/I/45sehIi6gVWL9qQbmGpt2E5YtFED+4 GdcmBSbWG/qsNsabXk38uiM3ww7+ltXEOhTXbcK+EgjvIhE6gSK/plYG0fU9pybs AKViEXVdHoT1X0N1dLK12mq7kvDCQvShHn08lz97Q9YrZ32wv1Fnij6WVSbJvfWt DubtPtisVM+rVy+VTpOImNR9wO54lTmG5jK53yNqH7I20K89y1kqARlN9nMXMB1a 2nQnwe9yWlsGj9gVNCn1KmyQSPOWjg+3Z+ekfwbxpca14s1AaN3Jm0N9Z61dXFoF y2ygoQtZ/z9BHr3quBpxXGt+aVUg2kcNw5GYeDYiALxXdJSObyzRrZ6HDb/zicU2 ZH9hBj0ctXvucmy6I2mt =uZrt -----END PGP SIGNATURE----- Merge tag 'pci-v4.4-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci Pull PCI updates from Bjorn Helgaas: "Resource management: - Add support for Enhanced Allocation devices (Sean O. Stalley) - Add Enhanced Allocation register entries (Sean O. Stalley) - Handle IORESOURCE_PCI_FIXED when sizing resources (David Daney) - Handle IORESOURCE_PCI_FIXED when assigning resources (David Daney) - Handle Enhanced Allocation capability for SR-IOV devices (David Daney) - Clear IORESOURCE_UNSET when reverting to firmware-assigned address (Bjorn Helgaas) - Make Enhanced Allocation bitmasks more obvious (Bjorn Helgaas) - Expand Enhanced Allocation BAR output (Bjorn Helgaas) - Add of_pci_check_probe_only to parse "linux,pci-probe-only" (Marc Zyngier) - Fix lookup of linux,pci-probe-only property (Marc Zyngier) - Add sparc mem64 resource parsing for root bus (Yinghai Lu) PCI device hotplug: - pciehp: Queue power work requests in dedicated function (Guenter Roeck) Driver binding: - Add builtin_pci_driver() to avoid registration boilerplate (Paul Gortmaker) Virtualization: - Set SR-IOV NumVFs to zero after enumeration (Alexander Duyck) - Remove redundant validation of SR-IOV offset/stride registers (Alexander Duyck) - Remove VFs in reverse order if virtfn_add() fails (Alexander Duyck) - Reorder pcibios_sriov_disable() (Alexander Duyck) - Wait 1 second between disabling VFs and clearing NumVFs (Alexander Duyck) - Fix sriov_enable() error path for pcibios_enable_sriov() failures (Alexander Duyck) - Enable SR-IOV ARI Capable Hierarchy before reading TotalVFs (Ben Shelton) - Don't try to restore VF BARs (Wei Yang) MSI: - Don't alloc pcibios-irq when MSI is enabled (Joerg Roedel) - Add msi_controller setup_irqs() method for special multivector setup (Lucas Stach) - Export all remapped MSIs to sysfs attributes (Romain Bezut) - Disable MSI on SiS 761 (Ondrej Zary) AER: - Clear error status registers during enumeration and restore (Taku Izumi) Generic host bridge driver: - Fix lookup of linux,pci-probe-only property (Marc Zyngier) - Allow multiple hosts with different map_bus() methods (David Daney) - Pass starting bus number to pci_scan_root_bus() (David Daney) - Fix address window calculation for non-zero starting bus (David Daney) Altera host bridge driver: - Add msi.h to ARM Kbuild (Ley Foon Tan) - Add Altera PCIe host controller driver (Ley Foon Tan) - Add Altera PCIe MSI driver (Ley Foon Tan) APM X-Gene host bridge driver: - Remove msi_controller assignment (Duc Dang) Broadcom iProc host bridge driver: - Fix header comment "Corporation" misspelling (Florian Fainelli) - Fix code comment to match code (Ray Jui) - Remove unused struct iproc_pcie.irqs[] (Ray Jui) - Call pci_fixup_irqs() for ARM64 as well as ARM (Ray Jui) - Fix PCIe reset logic (Ray Jui) - Improve link detection logic (Ray Jui) - Update PCIe device tree bindings (Ray Jui) - Add outbound mapping support (Ray Jui) Freescale i.MX6 host bridge driver: - Return real error code from imx6_add_pcie_port() (Fabio Estevam) - Add PCIE_PHY_RX_ASIC_OUT_VALID definition (Fabio Estevam) Freescale Layerscape host bridge driver: - Remove ls_pcie_establish_link() (Minghuan Lian) - Ignore PCIe controllers in Endpoint mode (Minghuan Lian) - Factor out SCFG related function (Minghuan Lian) - Update ls_add_pcie_port() (Minghuan Lian) - Remove unused fields from struct ls_pcie (Minghuan Lian) - Add support for LS1043a and LS2080a (Minghuan Lian) - Add ls_pcie_msi_host_init() (Minghuan Lian) HiSilicon host bridge driver: - Add HiSilicon SoC Hip05 PCIe driver (Zhou Wang) Marvell MVEBU host bridge driver: - Return zero for reserved or unimplemented config space (Russell King) - Use exact config access size; don't read/modify/write (Russell King) - Use of_get_available_child_count() (Russell King) - Use for_each_available_child_of_node() to walk child nodes (Russell King) - Report full node name when reporting a DT error (Russell King) - Use port->name rather than "PCIe%d.%d" (Russell King) - Move port parsing and resource claiming to separate function (Russell King) - Fix memory leaks and refcount leaks (Russell King) - Split port parsing and resource claiming from port setup (Russell King) - Use gpio_set_value_cansleep() (Russell King) - Use devm_kcalloc() to allocate an array (Russell King) - Use gpio_desc to carry around gpio (Russell King) - Improve clock/reset handling (Russell King) - Add PCI Express root complex capability block (Russell King) - Remove code restricting accesses to slot 0 (Russell King) NVIDIA Tegra host bridge driver: - Wrap static pgprot_t initializer with __pgprot() (Ard Biesheuvel) Renesas R-Car host bridge driver: - Build pci-rcar-gen2.c only on ARM (Geert Uytterhoeven) - Build pcie-rcar.c only on ARM (Geert Uytterhoeven) - Make PCI aware of the I/O resources (Phil Edworthy) - Remove dependency on ARM-specific struct hw_pci (Phil Edworthy) - Set root bus nr to that provided in DT (Phil Edworthy) - Fix I/O offset for multiple host bridges (Phil Edworthy) ST Microelectronics SPEAr13xx host bridge driver: - Fix dw_pcie_cfg_read/write() usage (Gabriele Paoloni) Synopsys DesignWare host bridge driver: - Make "clocks" and "clock-names" optional DT properties (Bhupesh Sharma) - Use exact access size in dw_pcie_cfg_read() (Gabriele Paoloni) - Simplify dw_pcie_cfg_read/write() interfaces (Gabriele Paoloni) - Require config accesses to be naturally aligned (Gabriele Paoloni) - Make "num-lanes" an optional DT property (Gabriele Paoloni) - Move calculation of bus addresses to DRA7xx (Gabriele Paoloni) - Replace ARM pci_sys_data->align_resource with global function pointer (Gabriele Paoloni) - Factor out MSI msg setup (Lucas Stach) - Implement multivector MSI IRQ setup (Lucas Stach) - Make get_msi_addr() return phys_addr_t, not u32 (Lucas Stach) - Set up high part of MSI target address (Lucas Stach) - Fix PORT_LOGIC_LINK_WIDTH_MASK (Zhou Wang) - Revert "PCI: designware: Program ATU with untranslated address" (Zhou Wang) - Use of_pci_get_host_bridge_resources() to parse DT (Zhou Wang) - Make driver arch-agnostic (Zhou Wang) Miscellaneous: - Make x86 pci_subsys_init() static (Alexander Kuleshov) - Turn off Request Attributes to avoid Chelsio T5 Completion erratum (Hariprasad Shenai)" * tag 'pci-v4.4-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (94 commits) PCI: altera: Add Altera PCIe MSI driver PCI: hisi: Add HiSilicon SoC Hip05 PCIe driver PCI: layerscape: Add ls_pcie_msi_host_init() PCI: layerscape: Add support for LS1043a and LS2080a PCI: layerscape: Remove unused fields from struct ls_pcie PCI: layerscape: Update ls_add_pcie_port() PCI: layerscape: Factor out SCFG related function PCI: layerscape: Ignore PCIe controllers in Endpoint mode PCI: layerscape: Remove ls_pcie_establish_link() PCI: designware: Make "clocks" and "clock-names" optional DT properties PCI: designware: Make driver arch-agnostic ARM/PCI: Replace pci_sys_data->align_resource with global function pointer PCI: designware: Use of_pci_get_host_bridge_resources() to parse DT Revert "PCI: designware: Program ATU with untranslated address" PCI: designware: Move calculation of bus addresses to DRA7xx PCI: designware: Make "num-lanes" an optional DT property PCI: designware: Require config accesses to be naturally aligned PCI: designware: Simplify dw_pcie_cfg_read/write() interfaces PCI: designware: Use exact access size in dw_pcie_cfg_read() PCI: spear: Fix dw_pcie_cfg_read/write() usage ...
1436 lines
35 KiB
C
1436 lines
35 KiB
C
/*
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* drivers/pci/pci-driver.c
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*
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* (C) Copyright 2002-2004, 2007 Greg Kroah-Hartman <greg@kroah.com>
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* (C) Copyright 2007 Novell Inc.
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*
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* Released under the GPL v2 only.
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*
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*/
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#include <linux/pci.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/mempolicy.h>
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#include <linux/string.h>
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#include <linux/slab.h>
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#include <linux/sched.h>
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#include <linux/cpu.h>
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#include <linux/pm_runtime.h>
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#include <linux/suspend.h>
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#include <linux/kexec.h>
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#include "pci.h"
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struct pci_dynid {
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struct list_head node;
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struct pci_device_id id;
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};
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/**
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* pci_add_dynid - add a new PCI device ID to this driver and re-probe devices
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* @drv: target pci driver
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* @vendor: PCI vendor ID
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* @device: PCI device ID
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* @subvendor: PCI subvendor ID
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* @subdevice: PCI subdevice ID
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* @class: PCI class
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* @class_mask: PCI class mask
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* @driver_data: private driver data
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*
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* Adds a new dynamic pci device ID to this driver and causes the
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* driver to probe for all devices again. @drv must have been
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* registered prior to calling this function.
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*
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* CONTEXT:
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* Does GFP_KERNEL allocation.
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*
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* RETURNS:
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* 0 on success, -errno on failure.
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*/
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int pci_add_dynid(struct pci_driver *drv,
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unsigned int vendor, unsigned int device,
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unsigned int subvendor, unsigned int subdevice,
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unsigned int class, unsigned int class_mask,
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unsigned long driver_data)
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{
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struct pci_dynid *dynid;
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dynid = kzalloc(sizeof(*dynid), GFP_KERNEL);
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if (!dynid)
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return -ENOMEM;
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dynid->id.vendor = vendor;
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dynid->id.device = device;
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dynid->id.subvendor = subvendor;
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dynid->id.subdevice = subdevice;
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dynid->id.class = class;
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dynid->id.class_mask = class_mask;
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dynid->id.driver_data = driver_data;
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spin_lock(&drv->dynids.lock);
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list_add_tail(&dynid->node, &drv->dynids.list);
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spin_unlock(&drv->dynids.lock);
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return driver_attach(&drv->driver);
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}
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EXPORT_SYMBOL_GPL(pci_add_dynid);
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static void pci_free_dynids(struct pci_driver *drv)
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{
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struct pci_dynid *dynid, *n;
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spin_lock(&drv->dynids.lock);
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list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
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list_del(&dynid->node);
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kfree(dynid);
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}
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spin_unlock(&drv->dynids.lock);
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}
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/**
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* store_new_id - sysfs frontend to pci_add_dynid()
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* @driver: target device driver
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* @buf: buffer for scanning device ID data
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* @count: input size
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*
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* Allow PCI IDs to be added to an existing driver via sysfs.
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*/
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static ssize_t store_new_id(struct device_driver *driver, const char *buf,
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size_t count)
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{
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struct pci_driver *pdrv = to_pci_driver(driver);
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const struct pci_device_id *ids = pdrv->id_table;
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__u32 vendor, device, subvendor = PCI_ANY_ID,
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subdevice = PCI_ANY_ID, class = 0, class_mask = 0;
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unsigned long driver_data = 0;
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int fields = 0;
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int retval = 0;
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fields = sscanf(buf, "%x %x %x %x %x %x %lx",
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&vendor, &device, &subvendor, &subdevice,
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&class, &class_mask, &driver_data);
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if (fields < 2)
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return -EINVAL;
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if (fields != 7) {
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struct pci_dev *pdev = kzalloc(sizeof(*pdev), GFP_KERNEL);
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if (!pdev)
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return -ENOMEM;
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pdev->vendor = vendor;
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pdev->device = device;
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pdev->subsystem_vendor = subvendor;
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pdev->subsystem_device = subdevice;
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pdev->class = class;
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if (pci_match_id(pdrv->id_table, pdev))
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retval = -EEXIST;
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kfree(pdev);
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if (retval)
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return retval;
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}
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/* Only accept driver_data values that match an existing id_table
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entry */
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if (ids) {
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retval = -EINVAL;
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while (ids->vendor || ids->subvendor || ids->class_mask) {
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if (driver_data == ids->driver_data) {
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retval = 0;
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break;
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}
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ids++;
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}
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if (retval) /* No match */
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return retval;
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}
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retval = pci_add_dynid(pdrv, vendor, device, subvendor, subdevice,
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class, class_mask, driver_data);
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if (retval)
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return retval;
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return count;
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}
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static DRIVER_ATTR(new_id, S_IWUSR, NULL, store_new_id);
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/**
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* store_remove_id - remove a PCI device ID from this driver
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* @driver: target device driver
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* @buf: buffer for scanning device ID data
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* @count: input size
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*
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* Removes a dynamic pci device ID to this driver.
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*/
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static ssize_t store_remove_id(struct device_driver *driver, const char *buf,
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size_t count)
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{
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struct pci_dynid *dynid, *n;
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struct pci_driver *pdrv = to_pci_driver(driver);
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__u32 vendor, device, subvendor = PCI_ANY_ID,
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subdevice = PCI_ANY_ID, class = 0, class_mask = 0;
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int fields = 0;
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size_t retval = -ENODEV;
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fields = sscanf(buf, "%x %x %x %x %x %x",
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&vendor, &device, &subvendor, &subdevice,
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&class, &class_mask);
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if (fields < 2)
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return -EINVAL;
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spin_lock(&pdrv->dynids.lock);
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list_for_each_entry_safe(dynid, n, &pdrv->dynids.list, node) {
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struct pci_device_id *id = &dynid->id;
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if ((id->vendor == vendor) &&
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(id->device == device) &&
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(subvendor == PCI_ANY_ID || id->subvendor == subvendor) &&
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(subdevice == PCI_ANY_ID || id->subdevice == subdevice) &&
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!((id->class ^ class) & class_mask)) {
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list_del(&dynid->node);
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kfree(dynid);
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retval = count;
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break;
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}
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}
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spin_unlock(&pdrv->dynids.lock);
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return retval;
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}
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static DRIVER_ATTR(remove_id, S_IWUSR, NULL, store_remove_id);
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static struct attribute *pci_drv_attrs[] = {
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&driver_attr_new_id.attr,
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&driver_attr_remove_id.attr,
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NULL,
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};
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ATTRIBUTE_GROUPS(pci_drv);
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/**
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* pci_match_id - See if a pci device matches a given pci_id table
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* @ids: array of PCI device id structures to search in
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* @dev: the PCI device structure to match against.
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*
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* Used by a driver to check whether a PCI device present in the
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* system is in its list of supported devices. Returns the matching
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* pci_device_id structure or %NULL if there is no match.
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*
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* Deprecated, don't use this as it will not catch any dynamic ids
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* that a driver might want to check for.
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*/
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const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
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struct pci_dev *dev)
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{
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if (ids) {
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while (ids->vendor || ids->subvendor || ids->class_mask) {
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|
if (pci_match_one_device(ids, dev))
|
|
return ids;
|
|
ids++;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL(pci_match_id);
|
|
|
|
static const struct pci_device_id pci_device_id_any = {
|
|
.vendor = PCI_ANY_ID,
|
|
.device = PCI_ANY_ID,
|
|
.subvendor = PCI_ANY_ID,
|
|
.subdevice = PCI_ANY_ID,
|
|
};
|
|
|
|
/**
|
|
* pci_match_device - Tell if a PCI device structure has a matching PCI device id structure
|
|
* @drv: the PCI driver to match against
|
|
* @dev: the PCI device structure to match against
|
|
*
|
|
* Used by a driver to check whether a PCI device present in the
|
|
* system is in its list of supported devices. Returns the matching
|
|
* pci_device_id structure or %NULL if there is no match.
|
|
*/
|
|
static const struct pci_device_id *pci_match_device(struct pci_driver *drv,
|
|
struct pci_dev *dev)
|
|
{
|
|
struct pci_dynid *dynid;
|
|
const struct pci_device_id *found_id = NULL;
|
|
|
|
/* When driver_override is set, only bind to the matching driver */
|
|
if (dev->driver_override && strcmp(dev->driver_override, drv->name))
|
|
return NULL;
|
|
|
|
/* Look at the dynamic ids first, before the static ones */
|
|
spin_lock(&drv->dynids.lock);
|
|
list_for_each_entry(dynid, &drv->dynids.list, node) {
|
|
if (pci_match_one_device(&dynid->id, dev)) {
|
|
found_id = &dynid->id;
|
|
break;
|
|
}
|
|
}
|
|
spin_unlock(&drv->dynids.lock);
|
|
|
|
if (!found_id)
|
|
found_id = pci_match_id(drv->id_table, dev);
|
|
|
|
/* driver_override will always match, send a dummy id */
|
|
if (!found_id && dev->driver_override)
|
|
found_id = &pci_device_id_any;
|
|
|
|
return found_id;
|
|
}
|
|
|
|
struct drv_dev_and_id {
|
|
struct pci_driver *drv;
|
|
struct pci_dev *dev;
|
|
const struct pci_device_id *id;
|
|
};
|
|
|
|
static long local_pci_probe(void *_ddi)
|
|
{
|
|
struct drv_dev_and_id *ddi = _ddi;
|
|
struct pci_dev *pci_dev = ddi->dev;
|
|
struct pci_driver *pci_drv = ddi->drv;
|
|
struct device *dev = &pci_dev->dev;
|
|
int rc;
|
|
|
|
/*
|
|
* Unbound PCI devices are always put in D0, regardless of
|
|
* runtime PM status. During probe, the device is set to
|
|
* active and the usage count is incremented. If the driver
|
|
* supports runtime PM, it should call pm_runtime_put_noidle(),
|
|
* or any other runtime PM helper function decrementing the usage
|
|
* count, in its probe routine and pm_runtime_get_noresume() in
|
|
* its remove routine.
|
|
*/
|
|
pm_runtime_get_sync(dev);
|
|
pci_dev->driver = pci_drv;
|
|
rc = pci_drv->probe(pci_dev, ddi->id);
|
|
if (!rc)
|
|
return rc;
|
|
if (rc < 0) {
|
|
pci_dev->driver = NULL;
|
|
pm_runtime_put_sync(dev);
|
|
return rc;
|
|
}
|
|
/*
|
|
* Probe function should return < 0 for failure, 0 for success
|
|
* Treat values > 0 as success, but warn.
|
|
*/
|
|
dev_warn(dev, "Driver probe function unexpectedly returned %d\n", rc);
|
|
return 0;
|
|
}
|
|
|
|
static int pci_call_probe(struct pci_driver *drv, struct pci_dev *dev,
|
|
const struct pci_device_id *id)
|
|
{
|
|
int error, node;
|
|
struct drv_dev_and_id ddi = { drv, dev, id };
|
|
|
|
/*
|
|
* Execute driver initialization on node where the device is
|
|
* attached. This way the driver likely allocates its local memory
|
|
* on the right node.
|
|
*/
|
|
node = dev_to_node(&dev->dev);
|
|
|
|
/*
|
|
* On NUMA systems, we are likely to call a PF probe function using
|
|
* work_on_cpu(). If that probe calls pci_enable_sriov() (which
|
|
* adds the VF devices via pci_bus_add_device()), we may re-enter
|
|
* this function to call the VF probe function. Calling
|
|
* work_on_cpu() again will cause a lockdep warning. Since VFs are
|
|
* always on the same node as the PF, we can work around this by
|
|
* avoiding work_on_cpu() when we're already on the correct node.
|
|
*
|
|
* Preemption is enabled, so it's theoretically unsafe to use
|
|
* numa_node_id(), but even if we run the probe function on the
|
|
* wrong node, it should be functionally correct.
|
|
*/
|
|
if (node >= 0 && node != numa_node_id()) {
|
|
int cpu;
|
|
|
|
get_online_cpus();
|
|
cpu = cpumask_any_and(cpumask_of_node(node), cpu_online_mask);
|
|
if (cpu < nr_cpu_ids)
|
|
error = work_on_cpu(cpu, local_pci_probe, &ddi);
|
|
else
|
|
error = local_pci_probe(&ddi);
|
|
put_online_cpus();
|
|
} else
|
|
error = local_pci_probe(&ddi);
|
|
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* __pci_device_probe - check if a driver wants to claim a specific PCI device
|
|
* @drv: driver to call to check if it wants the PCI device
|
|
* @pci_dev: PCI device being probed
|
|
*
|
|
* returns 0 on success, else error.
|
|
* side-effect: pci_dev->driver is set to drv when drv claims pci_dev.
|
|
*/
|
|
static int __pci_device_probe(struct pci_driver *drv, struct pci_dev *pci_dev)
|
|
{
|
|
const struct pci_device_id *id;
|
|
int error = 0;
|
|
|
|
if (!pci_dev->driver && drv->probe) {
|
|
error = -ENODEV;
|
|
|
|
id = pci_match_device(drv, pci_dev);
|
|
if (id)
|
|
error = pci_call_probe(drv, pci_dev, id);
|
|
if (error >= 0)
|
|
error = 0;
|
|
}
|
|
return error;
|
|
}
|
|
|
|
int __weak pcibios_alloc_irq(struct pci_dev *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
void __weak pcibios_free_irq(struct pci_dev *dev)
|
|
{
|
|
}
|
|
|
|
static int pci_device_probe(struct device *dev)
|
|
{
|
|
int error;
|
|
struct pci_dev *pci_dev = to_pci_dev(dev);
|
|
struct pci_driver *drv = to_pci_driver(dev->driver);
|
|
|
|
error = pcibios_alloc_irq(pci_dev);
|
|
if (error < 0)
|
|
return error;
|
|
|
|
pci_dev_get(pci_dev);
|
|
error = __pci_device_probe(drv, pci_dev);
|
|
if (error) {
|
|
pcibios_free_irq(pci_dev);
|
|
pci_dev_put(pci_dev);
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
static int pci_device_remove(struct device *dev)
|
|
{
|
|
struct pci_dev *pci_dev = to_pci_dev(dev);
|
|
struct pci_driver *drv = pci_dev->driver;
|
|
|
|
if (drv) {
|
|
if (drv->remove) {
|
|
pm_runtime_get_sync(dev);
|
|
drv->remove(pci_dev);
|
|
pm_runtime_put_noidle(dev);
|
|
}
|
|
pcibios_free_irq(pci_dev);
|
|
pci_dev->driver = NULL;
|
|
}
|
|
|
|
/* Undo the runtime PM settings in local_pci_probe() */
|
|
pm_runtime_put_sync(dev);
|
|
|
|
/*
|
|
* If the device is still on, set the power state as "unknown",
|
|
* since it might change by the next time we load the driver.
|
|
*/
|
|
if (pci_dev->current_state == PCI_D0)
|
|
pci_dev->current_state = PCI_UNKNOWN;
|
|
|
|
/*
|
|
* We would love to complain here if pci_dev->is_enabled is set, that
|
|
* the driver should have called pci_disable_device(), but the
|
|
* unfortunate fact is there are too many odd BIOS and bridge setups
|
|
* that don't like drivers doing that all of the time.
|
|
* Oh well, we can dream of sane hardware when we sleep, no matter how
|
|
* horrible the crap we have to deal with is when we are awake...
|
|
*/
|
|
|
|
pci_dev_put(pci_dev);
|
|
return 0;
|
|
}
|
|
|
|
static void pci_device_shutdown(struct device *dev)
|
|
{
|
|
struct pci_dev *pci_dev = to_pci_dev(dev);
|
|
struct pci_driver *drv = pci_dev->driver;
|
|
|
|
pm_runtime_resume(dev);
|
|
|
|
if (drv && drv->shutdown)
|
|
drv->shutdown(pci_dev);
|
|
pci_msi_shutdown(pci_dev);
|
|
pci_msix_shutdown(pci_dev);
|
|
|
|
#ifdef CONFIG_KEXEC_CORE
|
|
/*
|
|
* If this is a kexec reboot, turn off Bus Master bit on the
|
|
* device to tell it to not continue to do DMA. Don't touch
|
|
* devices in D3cold or unknown states.
|
|
* If it is not a kexec reboot, firmware will hit the PCI
|
|
* devices with big hammer and stop their DMA any way.
|
|
*/
|
|
if (kexec_in_progress && (pci_dev->current_state <= PCI_D3hot))
|
|
pci_clear_master(pci_dev);
|
|
#endif
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
|
|
/* Auxiliary functions used for system resume and run-time resume. */
|
|
|
|
/**
|
|
* pci_restore_standard_config - restore standard config registers of PCI device
|
|
* @pci_dev: PCI device to handle
|
|
*/
|
|
static int pci_restore_standard_config(struct pci_dev *pci_dev)
|
|
{
|
|
pci_update_current_state(pci_dev, PCI_UNKNOWN);
|
|
|
|
if (pci_dev->current_state != PCI_D0) {
|
|
int error = pci_set_power_state(pci_dev, PCI_D0);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
pci_restore_state(pci_dev);
|
|
return 0;
|
|
}
|
|
|
|
#endif
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
|
|
static void pci_pm_default_resume_early(struct pci_dev *pci_dev)
|
|
{
|
|
pci_power_up(pci_dev);
|
|
pci_restore_state(pci_dev);
|
|
pci_fixup_device(pci_fixup_resume_early, pci_dev);
|
|
}
|
|
|
|
/*
|
|
* Default "suspend" method for devices that have no driver provided suspend,
|
|
* or not even a driver at all (second part).
|
|
*/
|
|
static void pci_pm_set_unknown_state(struct pci_dev *pci_dev)
|
|
{
|
|
/*
|
|
* mark its power state as "unknown", since we don't know if
|
|
* e.g. the BIOS will change its device state when we suspend.
|
|
*/
|
|
if (pci_dev->current_state == PCI_D0)
|
|
pci_dev->current_state = PCI_UNKNOWN;
|
|
}
|
|
|
|
/*
|
|
* Default "resume" method for devices that have no driver provided resume,
|
|
* or not even a driver at all (second part).
|
|
*/
|
|
static int pci_pm_reenable_device(struct pci_dev *pci_dev)
|
|
{
|
|
int retval;
|
|
|
|
/* if the device was enabled before suspend, reenable */
|
|
retval = pci_reenable_device(pci_dev);
|
|
/*
|
|
* if the device was busmaster before the suspend, make it busmaster
|
|
* again
|
|
*/
|
|
if (pci_dev->is_busmaster)
|
|
pci_set_master(pci_dev);
|
|
|
|
return retval;
|
|
}
|
|
|
|
static int pci_legacy_suspend(struct device *dev, pm_message_t state)
|
|
{
|
|
struct pci_dev *pci_dev = to_pci_dev(dev);
|
|
struct pci_driver *drv = pci_dev->driver;
|
|
|
|
if (drv && drv->suspend) {
|
|
pci_power_t prev = pci_dev->current_state;
|
|
int error;
|
|
|
|
error = drv->suspend(pci_dev, state);
|
|
suspend_report_result(drv->suspend, error);
|
|
if (error)
|
|
return error;
|
|
|
|
if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0
|
|
&& pci_dev->current_state != PCI_UNKNOWN) {
|
|
WARN_ONCE(pci_dev->current_state != prev,
|
|
"PCI PM: Device state not saved by %pF\n",
|
|
drv->suspend);
|
|
}
|
|
}
|
|
|
|
pci_fixup_device(pci_fixup_suspend, pci_dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pci_legacy_suspend_late(struct device *dev, pm_message_t state)
|
|
{
|
|
struct pci_dev *pci_dev = to_pci_dev(dev);
|
|
struct pci_driver *drv = pci_dev->driver;
|
|
|
|
if (drv && drv->suspend_late) {
|
|
pci_power_t prev = pci_dev->current_state;
|
|
int error;
|
|
|
|
error = drv->suspend_late(pci_dev, state);
|
|
suspend_report_result(drv->suspend_late, error);
|
|
if (error)
|
|
return error;
|
|
|
|
if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0
|
|
&& pci_dev->current_state != PCI_UNKNOWN) {
|
|
WARN_ONCE(pci_dev->current_state != prev,
|
|
"PCI PM: Device state not saved by %pF\n",
|
|
drv->suspend_late);
|
|
goto Fixup;
|
|
}
|
|
}
|
|
|
|
if (!pci_dev->state_saved)
|
|
pci_save_state(pci_dev);
|
|
|
|
pci_pm_set_unknown_state(pci_dev);
|
|
|
|
Fixup:
|
|
pci_fixup_device(pci_fixup_suspend_late, pci_dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pci_legacy_resume_early(struct device *dev)
|
|
{
|
|
struct pci_dev *pci_dev = to_pci_dev(dev);
|
|
struct pci_driver *drv = pci_dev->driver;
|
|
|
|
return drv && drv->resume_early ?
|
|
drv->resume_early(pci_dev) : 0;
|
|
}
|
|
|
|
static int pci_legacy_resume(struct device *dev)
|
|
{
|
|
struct pci_dev *pci_dev = to_pci_dev(dev);
|
|
struct pci_driver *drv = pci_dev->driver;
|
|
|
|
pci_fixup_device(pci_fixup_resume, pci_dev);
|
|
|
|
return drv && drv->resume ?
|
|
drv->resume(pci_dev) : pci_pm_reenable_device(pci_dev);
|
|
}
|
|
|
|
/* Auxiliary functions used by the new power management framework */
|
|
|
|
static void pci_pm_default_resume(struct pci_dev *pci_dev)
|
|
{
|
|
pci_fixup_device(pci_fixup_resume, pci_dev);
|
|
|
|
if (!pci_has_subordinate(pci_dev))
|
|
pci_enable_wake(pci_dev, PCI_D0, false);
|
|
}
|
|
|
|
static void pci_pm_default_suspend(struct pci_dev *pci_dev)
|
|
{
|
|
/* Disable non-bridge devices without PM support */
|
|
if (!pci_has_subordinate(pci_dev))
|
|
pci_disable_enabled_device(pci_dev);
|
|
}
|
|
|
|
static bool pci_has_legacy_pm_support(struct pci_dev *pci_dev)
|
|
{
|
|
struct pci_driver *drv = pci_dev->driver;
|
|
bool ret = drv && (drv->suspend || drv->suspend_late || drv->resume
|
|
|| drv->resume_early);
|
|
|
|
/*
|
|
* Legacy PM support is used by default, so warn if the new framework is
|
|
* supported as well. Drivers are supposed to support either the
|
|
* former, or the latter, but not both at the same time.
|
|
*/
|
|
WARN(ret && drv->driver.pm, "driver %s device %04x:%04x\n",
|
|
drv->name, pci_dev->vendor, pci_dev->device);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* New power management framework */
|
|
|
|
static int pci_pm_prepare(struct device *dev)
|
|
{
|
|
struct device_driver *drv = dev->driver;
|
|
|
|
/*
|
|
* Devices having power.ignore_children set may still be necessary for
|
|
* suspending their children in the next phase of device suspend.
|
|
*/
|
|
if (dev->power.ignore_children)
|
|
pm_runtime_resume(dev);
|
|
|
|
if (drv && drv->pm && drv->pm->prepare) {
|
|
int error = drv->pm->prepare(dev);
|
|
if (error)
|
|
return error;
|
|
}
|
|
return pci_dev_keep_suspended(to_pci_dev(dev));
|
|
}
|
|
|
|
static void pci_pm_complete(struct device *dev)
|
|
{
|
|
pci_dev_complete_resume(to_pci_dev(dev));
|
|
pm_complete_with_resume_check(dev);
|
|
}
|
|
|
|
#else /* !CONFIG_PM_SLEEP */
|
|
|
|
#define pci_pm_prepare NULL
|
|
#define pci_pm_complete NULL
|
|
|
|
#endif /* !CONFIG_PM_SLEEP */
|
|
|
|
#ifdef CONFIG_SUSPEND
|
|
|
|
static int pci_pm_suspend(struct device *dev)
|
|
{
|
|
struct pci_dev *pci_dev = to_pci_dev(dev);
|
|
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
|
|
|
|
if (pci_has_legacy_pm_support(pci_dev))
|
|
return pci_legacy_suspend(dev, PMSG_SUSPEND);
|
|
|
|
if (!pm) {
|
|
pci_pm_default_suspend(pci_dev);
|
|
goto Fixup;
|
|
}
|
|
|
|
/*
|
|
* PCI devices suspended at run time need to be resumed at this point,
|
|
* because in general it is necessary to reconfigure them for system
|
|
* suspend. Namely, if the device is supposed to wake up the system
|
|
* from the sleep state, we may need to reconfigure it for this purpose.
|
|
* In turn, if the device is not supposed to wake up the system from the
|
|
* sleep state, we'll have to prevent it from signaling wake-up.
|
|
*/
|
|
pm_runtime_resume(dev);
|
|
|
|
pci_dev->state_saved = false;
|
|
if (pm->suspend) {
|
|
pci_power_t prev = pci_dev->current_state;
|
|
int error;
|
|
|
|
error = pm->suspend(dev);
|
|
suspend_report_result(pm->suspend, error);
|
|
if (error)
|
|
return error;
|
|
|
|
if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0
|
|
&& pci_dev->current_state != PCI_UNKNOWN) {
|
|
WARN_ONCE(pci_dev->current_state != prev,
|
|
"PCI PM: State of device not saved by %pF\n",
|
|
pm->suspend);
|
|
}
|
|
}
|
|
|
|
Fixup:
|
|
pci_fixup_device(pci_fixup_suspend, pci_dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pci_pm_suspend_noirq(struct device *dev)
|
|
{
|
|
struct pci_dev *pci_dev = to_pci_dev(dev);
|
|
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
|
|
|
|
if (pci_has_legacy_pm_support(pci_dev))
|
|
return pci_legacy_suspend_late(dev, PMSG_SUSPEND);
|
|
|
|
if (!pm) {
|
|
pci_save_state(pci_dev);
|
|
goto Fixup;
|
|
}
|
|
|
|
if (pm->suspend_noirq) {
|
|
pci_power_t prev = pci_dev->current_state;
|
|
int error;
|
|
|
|
error = pm->suspend_noirq(dev);
|
|
suspend_report_result(pm->suspend_noirq, error);
|
|
if (error)
|
|
return error;
|
|
|
|
if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0
|
|
&& pci_dev->current_state != PCI_UNKNOWN) {
|
|
WARN_ONCE(pci_dev->current_state != prev,
|
|
"PCI PM: State of device not saved by %pF\n",
|
|
pm->suspend_noirq);
|
|
goto Fixup;
|
|
}
|
|
}
|
|
|
|
if (!pci_dev->state_saved) {
|
|
pci_save_state(pci_dev);
|
|
if (!pci_has_subordinate(pci_dev))
|
|
pci_prepare_to_sleep(pci_dev);
|
|
}
|
|
|
|
pci_pm_set_unknown_state(pci_dev);
|
|
|
|
/*
|
|
* Some BIOSes from ASUS have a bug: If a USB EHCI host controller's
|
|
* PCI COMMAND register isn't 0, the BIOS assumes that the controller
|
|
* hasn't been quiesced and tries to turn it off. If the controller
|
|
* is already in D3, this can hang or cause memory corruption.
|
|
*
|
|
* Since the value of the COMMAND register doesn't matter once the
|
|
* device has been suspended, we can safely set it to 0 here.
|
|
*/
|
|
if (pci_dev->class == PCI_CLASS_SERIAL_USB_EHCI)
|
|
pci_write_config_word(pci_dev, PCI_COMMAND, 0);
|
|
|
|
Fixup:
|
|
pci_fixup_device(pci_fixup_suspend_late, pci_dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pci_pm_resume_noirq(struct device *dev)
|
|
{
|
|
struct pci_dev *pci_dev = to_pci_dev(dev);
|
|
struct device_driver *drv = dev->driver;
|
|
int error = 0;
|
|
|
|
pci_pm_default_resume_early(pci_dev);
|
|
|
|
if (pci_has_legacy_pm_support(pci_dev))
|
|
return pci_legacy_resume_early(dev);
|
|
|
|
if (drv && drv->pm && drv->pm->resume_noirq)
|
|
error = drv->pm->resume_noirq(dev);
|
|
|
|
return error;
|
|
}
|
|
|
|
static int pci_pm_resume(struct device *dev)
|
|
{
|
|
struct pci_dev *pci_dev = to_pci_dev(dev);
|
|
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
|
|
int error = 0;
|
|
|
|
/*
|
|
* This is necessary for the suspend error path in which resume is
|
|
* called without restoring the standard config registers of the device.
|
|
*/
|
|
if (pci_dev->state_saved)
|
|
pci_restore_standard_config(pci_dev);
|
|
|
|
if (pci_has_legacy_pm_support(pci_dev))
|
|
return pci_legacy_resume(dev);
|
|
|
|
pci_pm_default_resume(pci_dev);
|
|
|
|
if (pm) {
|
|
if (pm->resume)
|
|
error = pm->resume(dev);
|
|
} else {
|
|
pci_pm_reenable_device(pci_dev);
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
#else /* !CONFIG_SUSPEND */
|
|
|
|
#define pci_pm_suspend NULL
|
|
#define pci_pm_suspend_noirq NULL
|
|
#define pci_pm_resume NULL
|
|
#define pci_pm_resume_noirq NULL
|
|
|
|
#endif /* !CONFIG_SUSPEND */
|
|
|
|
#ifdef CONFIG_HIBERNATE_CALLBACKS
|
|
|
|
|
|
/*
|
|
* pcibios_pm_ops - provide arch-specific hooks when a PCI device is doing
|
|
* a hibernate transition
|
|
*/
|
|
struct dev_pm_ops __weak pcibios_pm_ops;
|
|
|
|
static int pci_pm_freeze(struct device *dev)
|
|
{
|
|
struct pci_dev *pci_dev = to_pci_dev(dev);
|
|
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
|
|
|
|
if (pci_has_legacy_pm_support(pci_dev))
|
|
return pci_legacy_suspend(dev, PMSG_FREEZE);
|
|
|
|
if (!pm) {
|
|
pci_pm_default_suspend(pci_dev);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This used to be done in pci_pm_prepare() for all devices and some
|
|
* drivers may depend on it, so do it here. Ideally, runtime-suspended
|
|
* devices should not be touched during freeze/thaw transitions,
|
|
* however.
|
|
*/
|
|
pm_runtime_resume(dev);
|
|
|
|
pci_dev->state_saved = false;
|
|
if (pm->freeze) {
|
|
int error;
|
|
|
|
error = pm->freeze(dev);
|
|
suspend_report_result(pm->freeze, error);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
if (pcibios_pm_ops.freeze)
|
|
return pcibios_pm_ops.freeze(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pci_pm_freeze_noirq(struct device *dev)
|
|
{
|
|
struct pci_dev *pci_dev = to_pci_dev(dev);
|
|
struct device_driver *drv = dev->driver;
|
|
|
|
if (pci_has_legacy_pm_support(pci_dev))
|
|
return pci_legacy_suspend_late(dev, PMSG_FREEZE);
|
|
|
|
if (drv && drv->pm && drv->pm->freeze_noirq) {
|
|
int error;
|
|
|
|
error = drv->pm->freeze_noirq(dev);
|
|
suspend_report_result(drv->pm->freeze_noirq, error);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
if (!pci_dev->state_saved)
|
|
pci_save_state(pci_dev);
|
|
|
|
pci_pm_set_unknown_state(pci_dev);
|
|
|
|
if (pcibios_pm_ops.freeze_noirq)
|
|
return pcibios_pm_ops.freeze_noirq(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pci_pm_thaw_noirq(struct device *dev)
|
|
{
|
|
struct pci_dev *pci_dev = to_pci_dev(dev);
|
|
struct device_driver *drv = dev->driver;
|
|
int error = 0;
|
|
|
|
if (pcibios_pm_ops.thaw_noirq) {
|
|
error = pcibios_pm_ops.thaw_noirq(dev);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
if (pci_has_legacy_pm_support(pci_dev))
|
|
return pci_legacy_resume_early(dev);
|
|
|
|
pci_update_current_state(pci_dev, PCI_D0);
|
|
|
|
if (drv && drv->pm && drv->pm->thaw_noirq)
|
|
error = drv->pm->thaw_noirq(dev);
|
|
|
|
return error;
|
|
}
|
|
|
|
static int pci_pm_thaw(struct device *dev)
|
|
{
|
|
struct pci_dev *pci_dev = to_pci_dev(dev);
|
|
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
|
|
int error = 0;
|
|
|
|
if (pcibios_pm_ops.thaw) {
|
|
error = pcibios_pm_ops.thaw(dev);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
if (pci_has_legacy_pm_support(pci_dev))
|
|
return pci_legacy_resume(dev);
|
|
|
|
if (pm) {
|
|
if (pm->thaw)
|
|
error = pm->thaw(dev);
|
|
} else {
|
|
pci_pm_reenable_device(pci_dev);
|
|
}
|
|
|
|
pci_dev->state_saved = false;
|
|
|
|
return error;
|
|
}
|
|
|
|
static int pci_pm_poweroff(struct device *dev)
|
|
{
|
|
struct pci_dev *pci_dev = to_pci_dev(dev);
|
|
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
|
|
|
|
if (pci_has_legacy_pm_support(pci_dev))
|
|
return pci_legacy_suspend(dev, PMSG_HIBERNATE);
|
|
|
|
if (!pm) {
|
|
pci_pm_default_suspend(pci_dev);
|
|
goto Fixup;
|
|
}
|
|
|
|
/* The reason to do that is the same as in pci_pm_suspend(). */
|
|
pm_runtime_resume(dev);
|
|
|
|
pci_dev->state_saved = false;
|
|
if (pm->poweroff) {
|
|
int error;
|
|
|
|
error = pm->poweroff(dev);
|
|
suspend_report_result(pm->poweroff, error);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
Fixup:
|
|
pci_fixup_device(pci_fixup_suspend, pci_dev);
|
|
|
|
if (pcibios_pm_ops.poweroff)
|
|
return pcibios_pm_ops.poweroff(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pci_pm_poweroff_noirq(struct device *dev)
|
|
{
|
|
struct pci_dev *pci_dev = to_pci_dev(dev);
|
|
struct device_driver *drv = dev->driver;
|
|
|
|
if (pci_has_legacy_pm_support(to_pci_dev(dev)))
|
|
return pci_legacy_suspend_late(dev, PMSG_HIBERNATE);
|
|
|
|
if (!drv || !drv->pm) {
|
|
pci_fixup_device(pci_fixup_suspend_late, pci_dev);
|
|
return 0;
|
|
}
|
|
|
|
if (drv->pm->poweroff_noirq) {
|
|
int error;
|
|
|
|
error = drv->pm->poweroff_noirq(dev);
|
|
suspend_report_result(drv->pm->poweroff_noirq, error);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
if (!pci_dev->state_saved && !pci_has_subordinate(pci_dev))
|
|
pci_prepare_to_sleep(pci_dev);
|
|
|
|
/*
|
|
* The reason for doing this here is the same as for the analogous code
|
|
* in pci_pm_suspend_noirq().
|
|
*/
|
|
if (pci_dev->class == PCI_CLASS_SERIAL_USB_EHCI)
|
|
pci_write_config_word(pci_dev, PCI_COMMAND, 0);
|
|
|
|
pci_fixup_device(pci_fixup_suspend_late, pci_dev);
|
|
|
|
if (pcibios_pm_ops.poweroff_noirq)
|
|
return pcibios_pm_ops.poweroff_noirq(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pci_pm_restore_noirq(struct device *dev)
|
|
{
|
|
struct pci_dev *pci_dev = to_pci_dev(dev);
|
|
struct device_driver *drv = dev->driver;
|
|
int error = 0;
|
|
|
|
if (pcibios_pm_ops.restore_noirq) {
|
|
error = pcibios_pm_ops.restore_noirq(dev);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
pci_pm_default_resume_early(pci_dev);
|
|
|
|
if (pci_has_legacy_pm_support(pci_dev))
|
|
return pci_legacy_resume_early(dev);
|
|
|
|
if (drv && drv->pm && drv->pm->restore_noirq)
|
|
error = drv->pm->restore_noirq(dev);
|
|
|
|
return error;
|
|
}
|
|
|
|
static int pci_pm_restore(struct device *dev)
|
|
{
|
|
struct pci_dev *pci_dev = to_pci_dev(dev);
|
|
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
|
|
int error = 0;
|
|
|
|
if (pcibios_pm_ops.restore) {
|
|
error = pcibios_pm_ops.restore(dev);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* This is necessary for the hibernation error path in which restore is
|
|
* called without restoring the standard config registers of the device.
|
|
*/
|
|
if (pci_dev->state_saved)
|
|
pci_restore_standard_config(pci_dev);
|
|
|
|
if (pci_has_legacy_pm_support(pci_dev))
|
|
return pci_legacy_resume(dev);
|
|
|
|
pci_pm_default_resume(pci_dev);
|
|
|
|
if (pm) {
|
|
if (pm->restore)
|
|
error = pm->restore(dev);
|
|
} else {
|
|
pci_pm_reenable_device(pci_dev);
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
#else /* !CONFIG_HIBERNATE_CALLBACKS */
|
|
|
|
#define pci_pm_freeze NULL
|
|
#define pci_pm_freeze_noirq NULL
|
|
#define pci_pm_thaw NULL
|
|
#define pci_pm_thaw_noirq NULL
|
|
#define pci_pm_poweroff NULL
|
|
#define pci_pm_poweroff_noirq NULL
|
|
#define pci_pm_restore NULL
|
|
#define pci_pm_restore_noirq NULL
|
|
|
|
#endif /* !CONFIG_HIBERNATE_CALLBACKS */
|
|
|
|
#ifdef CONFIG_PM
|
|
|
|
static int pci_pm_runtime_suspend(struct device *dev)
|
|
{
|
|
struct pci_dev *pci_dev = to_pci_dev(dev);
|
|
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
|
|
pci_power_t prev = pci_dev->current_state;
|
|
int error;
|
|
|
|
/*
|
|
* If pci_dev->driver is not set (unbound), the device should
|
|
* always remain in D0 regardless of the runtime PM status
|
|
*/
|
|
if (!pci_dev->driver)
|
|
return 0;
|
|
|
|
if (!pm || !pm->runtime_suspend)
|
|
return -ENOSYS;
|
|
|
|
pci_dev->state_saved = false;
|
|
pci_dev->no_d3cold = false;
|
|
error = pm->runtime_suspend(dev);
|
|
suspend_report_result(pm->runtime_suspend, error);
|
|
if (error)
|
|
return error;
|
|
if (!pci_dev->d3cold_allowed)
|
|
pci_dev->no_d3cold = true;
|
|
|
|
pci_fixup_device(pci_fixup_suspend, pci_dev);
|
|
|
|
if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0
|
|
&& pci_dev->current_state != PCI_UNKNOWN) {
|
|
WARN_ONCE(pci_dev->current_state != prev,
|
|
"PCI PM: State of device not saved by %pF\n",
|
|
pm->runtime_suspend);
|
|
return 0;
|
|
}
|
|
|
|
if (!pci_dev->state_saved) {
|
|
pci_save_state(pci_dev);
|
|
pci_finish_runtime_suspend(pci_dev);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pci_pm_runtime_resume(struct device *dev)
|
|
{
|
|
int rc;
|
|
struct pci_dev *pci_dev = to_pci_dev(dev);
|
|
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
|
|
|
|
/*
|
|
* If pci_dev->driver is not set (unbound), the device should
|
|
* always remain in D0 regardless of the runtime PM status
|
|
*/
|
|
if (!pci_dev->driver)
|
|
return 0;
|
|
|
|
if (!pm || !pm->runtime_resume)
|
|
return -ENOSYS;
|
|
|
|
pci_restore_standard_config(pci_dev);
|
|
pci_fixup_device(pci_fixup_resume_early, pci_dev);
|
|
__pci_enable_wake(pci_dev, PCI_D0, true, false);
|
|
pci_fixup_device(pci_fixup_resume, pci_dev);
|
|
|
|
rc = pm->runtime_resume(dev);
|
|
|
|
pci_dev->runtime_d3cold = false;
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int pci_pm_runtime_idle(struct device *dev)
|
|
{
|
|
struct pci_dev *pci_dev = to_pci_dev(dev);
|
|
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
|
|
int ret = 0;
|
|
|
|
/*
|
|
* If pci_dev->driver is not set (unbound), the device should
|
|
* always remain in D0 regardless of the runtime PM status
|
|
*/
|
|
if (!pci_dev->driver)
|
|
return 0;
|
|
|
|
if (!pm)
|
|
return -ENOSYS;
|
|
|
|
if (pm->runtime_idle)
|
|
ret = pm->runtime_idle(dev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct dev_pm_ops pci_dev_pm_ops = {
|
|
.prepare = pci_pm_prepare,
|
|
.complete = pci_pm_complete,
|
|
.suspend = pci_pm_suspend,
|
|
.resume = pci_pm_resume,
|
|
.freeze = pci_pm_freeze,
|
|
.thaw = pci_pm_thaw,
|
|
.poweroff = pci_pm_poweroff,
|
|
.restore = pci_pm_restore,
|
|
.suspend_noirq = pci_pm_suspend_noirq,
|
|
.resume_noirq = pci_pm_resume_noirq,
|
|
.freeze_noirq = pci_pm_freeze_noirq,
|
|
.thaw_noirq = pci_pm_thaw_noirq,
|
|
.poweroff_noirq = pci_pm_poweroff_noirq,
|
|
.restore_noirq = pci_pm_restore_noirq,
|
|
.runtime_suspend = pci_pm_runtime_suspend,
|
|
.runtime_resume = pci_pm_runtime_resume,
|
|
.runtime_idle = pci_pm_runtime_idle,
|
|
};
|
|
|
|
#define PCI_PM_OPS_PTR (&pci_dev_pm_ops)
|
|
|
|
#else /* !CONFIG_PM */
|
|
|
|
#define pci_pm_runtime_suspend NULL
|
|
#define pci_pm_runtime_resume NULL
|
|
#define pci_pm_runtime_idle NULL
|
|
|
|
#define PCI_PM_OPS_PTR NULL
|
|
|
|
#endif /* !CONFIG_PM */
|
|
|
|
/**
|
|
* __pci_register_driver - register a new pci driver
|
|
* @drv: the driver structure to register
|
|
* @owner: owner module of drv
|
|
* @mod_name: module name string
|
|
*
|
|
* Adds the driver structure to the list of registered drivers.
|
|
* Returns a negative value on error, otherwise 0.
|
|
* If no error occurred, the driver remains registered even if
|
|
* no device was claimed during registration.
|
|
*/
|
|
int __pci_register_driver(struct pci_driver *drv, struct module *owner,
|
|
const char *mod_name)
|
|
{
|
|
/* initialize common driver fields */
|
|
drv->driver.name = drv->name;
|
|
drv->driver.bus = &pci_bus_type;
|
|
drv->driver.owner = owner;
|
|
drv->driver.mod_name = mod_name;
|
|
|
|
spin_lock_init(&drv->dynids.lock);
|
|
INIT_LIST_HEAD(&drv->dynids.list);
|
|
|
|
/* register with core */
|
|
return driver_register(&drv->driver);
|
|
}
|
|
EXPORT_SYMBOL(__pci_register_driver);
|
|
|
|
/**
|
|
* pci_unregister_driver - unregister a pci driver
|
|
* @drv: the driver structure to unregister
|
|
*
|
|
* Deletes the driver structure from the list of registered PCI drivers,
|
|
* gives it a chance to clean up by calling its remove() function for
|
|
* each device it was responsible for, and marks those devices as
|
|
* driverless.
|
|
*/
|
|
|
|
void pci_unregister_driver(struct pci_driver *drv)
|
|
{
|
|
driver_unregister(&drv->driver);
|
|
pci_free_dynids(drv);
|
|
}
|
|
EXPORT_SYMBOL(pci_unregister_driver);
|
|
|
|
static struct pci_driver pci_compat_driver = {
|
|
.name = "compat"
|
|
};
|
|
|
|
/**
|
|
* pci_dev_driver - get the pci_driver of a device
|
|
* @dev: the device to query
|
|
*
|
|
* Returns the appropriate pci_driver structure or %NULL if there is no
|
|
* registered driver for the device.
|
|
*/
|
|
struct pci_driver *pci_dev_driver(const struct pci_dev *dev)
|
|
{
|
|
if (dev->driver)
|
|
return dev->driver;
|
|
else {
|
|
int i;
|
|
for (i = 0; i <= PCI_ROM_RESOURCE; i++)
|
|
if (dev->resource[i].flags & IORESOURCE_BUSY)
|
|
return &pci_compat_driver;
|
|
}
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL(pci_dev_driver);
|
|
|
|
/**
|
|
* pci_bus_match - Tell if a PCI device structure has a matching PCI device id structure
|
|
* @dev: the PCI device structure to match against
|
|
* @drv: the device driver to search for matching PCI device id structures
|
|
*
|
|
* Used by a driver to check whether a PCI device present in the
|
|
* system is in its list of supported devices. Returns the matching
|
|
* pci_device_id structure or %NULL if there is no match.
|
|
*/
|
|
static int pci_bus_match(struct device *dev, struct device_driver *drv)
|
|
{
|
|
struct pci_dev *pci_dev = to_pci_dev(dev);
|
|
struct pci_driver *pci_drv;
|
|
const struct pci_device_id *found_id;
|
|
|
|
if (!pci_dev->match_driver)
|
|
return 0;
|
|
|
|
pci_drv = to_pci_driver(drv);
|
|
found_id = pci_match_device(pci_drv, pci_dev);
|
|
if (found_id)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* pci_dev_get - increments the reference count of the pci device structure
|
|
* @dev: the device being referenced
|
|
*
|
|
* Each live reference to a device should be refcounted.
|
|
*
|
|
* Drivers for PCI devices should normally record such references in
|
|
* their probe() methods, when they bind to a device, and release
|
|
* them by calling pci_dev_put(), in their disconnect() methods.
|
|
*
|
|
* A pointer to the device with the incremented reference counter is returned.
|
|
*/
|
|
struct pci_dev *pci_dev_get(struct pci_dev *dev)
|
|
{
|
|
if (dev)
|
|
get_device(&dev->dev);
|
|
return dev;
|
|
}
|
|
EXPORT_SYMBOL(pci_dev_get);
|
|
|
|
/**
|
|
* pci_dev_put - release a use of the pci device structure
|
|
* @dev: device that's been disconnected
|
|
*
|
|
* Must be called when a user of a device is finished with it. When the last
|
|
* user of the device calls this function, the memory of the device is freed.
|
|
*/
|
|
void pci_dev_put(struct pci_dev *dev)
|
|
{
|
|
if (dev)
|
|
put_device(&dev->dev);
|
|
}
|
|
EXPORT_SYMBOL(pci_dev_put);
|
|
|
|
static int pci_uevent(struct device *dev, struct kobj_uevent_env *env)
|
|
{
|
|
struct pci_dev *pdev;
|
|
|
|
if (!dev)
|
|
return -ENODEV;
|
|
|
|
pdev = to_pci_dev(dev);
|
|
|
|
if (add_uevent_var(env, "PCI_CLASS=%04X", pdev->class))
|
|
return -ENOMEM;
|
|
|
|
if (add_uevent_var(env, "PCI_ID=%04X:%04X", pdev->vendor, pdev->device))
|
|
return -ENOMEM;
|
|
|
|
if (add_uevent_var(env, "PCI_SUBSYS_ID=%04X:%04X", pdev->subsystem_vendor,
|
|
pdev->subsystem_device))
|
|
return -ENOMEM;
|
|
|
|
if (add_uevent_var(env, "PCI_SLOT_NAME=%s", pci_name(pdev)))
|
|
return -ENOMEM;
|
|
|
|
if (add_uevent_var(env, "MODALIAS=pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02X",
|
|
pdev->vendor, pdev->device,
|
|
pdev->subsystem_vendor, pdev->subsystem_device,
|
|
(u8)(pdev->class >> 16), (u8)(pdev->class >> 8),
|
|
(u8)(pdev->class)))
|
|
return -ENOMEM;
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct bus_type pci_bus_type = {
|
|
.name = "pci",
|
|
.match = pci_bus_match,
|
|
.uevent = pci_uevent,
|
|
.probe = pci_device_probe,
|
|
.remove = pci_device_remove,
|
|
.shutdown = pci_device_shutdown,
|
|
.dev_groups = pci_dev_groups,
|
|
.bus_groups = pci_bus_groups,
|
|
.drv_groups = pci_drv_groups,
|
|
.pm = PCI_PM_OPS_PTR,
|
|
};
|
|
EXPORT_SYMBOL(pci_bus_type);
|
|
|
|
static int __init pci_driver_init(void)
|
|
{
|
|
return bus_register(&pci_bus_type);
|
|
}
|
|
postcore_initcall(pci_driver_init);
|