pci_find_capability – query for devices’ capabilities Synopsis int pci_find_capability(struct pci_dev *dev, int cap); Arguments dev PCI device to query cap capability code Description Tell if a device supports a given PCI capability. Returns the address of the requested capability structure within the device’s PCI configuration space or 0 in case the device does not support…
pci_find_bus – locate PCI bus from a given domain and bus number Synopsis struct pci_bus *pci_find_bus(int domain, int busnr); Arguments domain number of PCI domain to search busnr number of desired PCI bus Description Given a PCI bus number and domain number, the desired PCI bus is located in the global list of PCI buses….
pci_enable_sriov – enable the SR-IOV capability Synopsis int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn); Arguments dev the PCI device nr_virtfn number of virtual functions to enable Description Returns 0 on success, or negative on failure. Copyright
pci_enable_rom – enable ROM decoding for a PCI device Synopsis int pci_enable_rom(struct pci_dev *pdev); Arguments pdev PCI device to enable Description Enable ROM decoding on dev. This involves simply turning on the last bit of the PCI ROM BAR. Note that some cards may share address decoders between the ROM and other resources, so enabling…
pci_enable_msix_range – configure device’s MSI-X capability structure Synopsis int pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries, int minvec, int maxvec); Arguments dev pointer to the pci_dev data structure of MSI-X device function entries pointer to an array of MSI-X entries minvec minimum number of MSI-X irqs requested maxvec maximum number of MSI-X irqs requested Description Setup…
pci_enable_msix – configure device’s MSI-X capability structure Synopsis int pci_enable_msix(struct pci_dev *dev, struct msix_entry *entries, int nvec); Arguments dev pointer to the pci_dev data structure of MSI-X device function entries pointer to an array of MSI-X entries (optional) nvec number of MSI-X irqs requested for allocation by device driver Description Setup the MSI-X capability structure…
pci_enable_msi_range – configure device’s MSI capability structure Synopsis int pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec); Arguments dev device to configure minvec minimal number of interrupts to configure maxvec maximum number of interrupts to configure Description This function tries to allocate a maximum possible number of interrupts in a range between minvec and maxvec. It…
pci_enable_device_mem – Initialize a device for use with Memory space Synopsis int pci_enable_device_mem(struct pci_dev *dev); Arguments dev PCI device to be initialized Description Initialize device before it’s used by a driver. Ask low-level code to enable Memory resources. Wake up the device if it was suspended. Beware, this function can fail. Copyright
pci_enable_device_io – Initialize a device for use with IO space Synopsis int pci_enable_device_io(struct pci_dev *dev); Arguments dev PCI device to be initialized Description Initialize device before it’s used by a driver. Ask low-level code to enable I/O resources. Wake up the device if it was suspended. Beware, this function can fail. Copyright
pci_enable_device – Initialize device before it’s used by a driver. Synopsis int pci_enable_device(struct pci_dev *dev); Arguments dev PCI device to be initialized Description Initialize device before it’s used by a driver. Ask low-level code to enable I/O and memory. Wake up the device if it was suspended. Beware, this function can fail. Note we don’t…
pci_disable_sriov – disable the SR-IOV capability Synopsis void pci_disable_sriov(struct pci_dev *dev); Arguments dev the PCI device Copyright
pci_disable_rom – disable ROM decoding for a PCI device Synopsis void pci_disable_rom(struct pci_dev *pdev); Arguments pdev PCI device to disable Description Disable ROM decoding on a PCI device by turning off the last bit in the ROM BAR. Copyright
pci_disable_device – Disable PCI device after use Synopsis void pci_disable_device(struct pci_dev *dev); Arguments dev PCI device to be disabled Description Signal to the system that the PCI device is not in use by the system anymore. This only involves disabling PCI bus-mastering, if active. Note we don’t actually disable the device until all callers of…
pci_dev_run_wake – Check if device can generate run-time wake-up events. Synopsis bool pci_dev_run_wake(struct pci_dev * dev); Arguments dev Device to check. Description Return true if the device itself is capable of generating wake-up events (through the platform or using the native PCIe PME) or if the device supports PME and one of its upstream bridges can generate…
pci_dev_put – release a use of the pci device structure Synopsis void pci_dev_put(struct pci_dev *dev); Arguments dev device that’s been disconnected Description 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. Copyright
pci_dev_present – Returns 1 if device matching the device list is present, 0 if not. Synopsis int pci_dev_present(const struct pci_device_id *ids); Arguments ids A pointer to a null terminated list of struct pci_device_id structures that describe the type of PCI device the caller is trying to find. Description Obvious fact: You do not have a…
pci_dev_get – increments the reference count of the pci device structure Synopsis struct pci_dev *pci_dev_get(struct pci_dev *dev); Arguments dev the device being referenced Description 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…
pci_dev_driver – get the pci_driver of a device Synopsis struct pci_driver *pci_dev_driver(const struct pci_dev *dev); Arguments dev the device to query Description Returns the appropriate pci_driver structure or NULL if there is no registered driver for the device. Copyright
pci_destroy_slot – decrement refcount for physical PCI slot Synopsis void pci_destroy_slot(struct pci_slot *slot); Arguments slot struct pci_slot to decrement Description struct pci_slot is refcounted, so destroying them is really easy; we just call kobject_put on its kobj and let our release methods do the rest. Copyright
pci_d3cold_enable – Enable D3cold for device Synopsis void pci_d3cold_enable(struct pci_dev *dev); Arguments dev PCI device to handle Description This function can be used in drivers to enable D3cold from the device they handle. It also updates upstream PCI bridge PM capabilities accordingly. Copyright