[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH v2 02/15] xen/asm-generic: introduce generic device.h
Arm, PPC and RISC-V use the same device.h thereby device.h was moved to asm-generic. Arm's device.h was taken as a base with the following changes: - #ifdef PCI related things. - #ifdef ACPI related things. - Rename #ifdef guards. - Add SPDX tag. Signed-off-by: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx> --- It is still open question if device.h should be in asm-generic. Need more opinions. Changes in V2: - take ( as common ) device.h from Arm as PPC and RISC-V use it as a base. - #ifdef PCI related things. - #ifdef ACPI related things. - rename DEVICE_GIC to DEVIC_IC. - rename #ifdef guards. - switch Arm and PPC to generic device.h - add SPDX tag - update the commit message --- xen/include/asm-generic/device.h | 140 +++++++++++++++++++++++++++++++ 1 file changed, 140 insertions(+) create mode 100644 xen/include/asm-generic/device.h diff --git a/xen/include/asm-generic/device.h b/xen/include/asm-generic/device.h new file mode 100644 index 0000000000..5478fc11ca --- /dev/null +++ b/xen/include/asm-generic/device.h @@ -0,0 +1,140 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#ifndef __ASM_GENERIC_DEVICE_H__ +#define __ASM_GENERIC_DEVICE_H__ + +enum device_type +{ + DEV_DT, +#ifdef HAS_PCI + DEV_PCI, +#endif +}; + +struct dev_archdata { + void *iommu; /* IOMMU private data */ +}; + +/* struct device - The basic device structure */ +struct device +{ + enum device_type type; +#ifdef CONFIG_HAS_DEVICE_TREE + struct dt_device_node *of_node; /* Used by drivers imported from Linux */ +#endif + struct dev_archdata archdata; + struct iommu_fwspec *iommu_fwspec; /* per-device IOMMU instance data */ +}; + +typedef struct device device_t; + +#include <xen/device_tree.h> + +#ifdef HAS_PCI +#define dev_is_pci(dev) ((dev)->type == DEV_PCI) +#endif + +#define dev_is_dt(dev) ((dev)->type == DEV_DT) + +enum device_class +{ + DEVICE_SERIAL, + DEVICE_IOMMU, + DEVICE_IC, +#ifdef HAS_PCI + DEVICE_PCI_HOSTBRIDGE, +#endif + /* Use for error */ + DEVICE_UNKNOWN, +}; + +struct device_desc { + /* Device name */ + const char *name; + /* Device class */ + enum device_class class; + /* List of devices supported by this driver */ + const struct dt_device_match *dt_match; + /* + * Device initialization. + * + * -EAGAIN is used to indicate that device probing is deferred. + */ + int (*init)(struct dt_device_node *dev, const void *data); +}; + +#ifdef CONFIG_ACPI + +struct acpi_device_desc { + /* Device name */ + const char *name; + /* Device class */ + enum device_class class; + /* type of device supported by the driver */ + const int class_type; + /* Device initialization */ + int (*init)(const void *data); +}; + +/** + * acpi_device_init - Initialize a device + * @class: class of the device (serial, network...) + * @data: specific data for initializing the device + * + * Return 0 on success. + */ +int acpi_device_init(enum device_class class, + const void *data, int class_type); + +#endif /* CONFIG_ACPI */ + +/** + * device_init - Initialize a device + * @dev: device to initialize + * @class: class of the device (serial, network...) + * @data: specific data for initializing the device + * + * Return 0 on success. + */ +int device_init(struct dt_device_node *dev, enum device_class class, + const void *data); + +/** + * device_get_type - Get the type of the device + * @dev: device to match + * + * Return the device type on success or DEVICE_ANY on failure + */ +enum device_class device_get_class(const struct dt_device_node *dev); + +#define DT_DEVICE_START(_name, _namestr, _class) \ +static const struct device_desc __dev_desc_##_name __used \ +__section(".dev.info") = { \ + .name = _namestr, \ + .class = _class, \ + +#define DT_DEVICE_END \ +}; + +#ifdef CONFIG_ACPI + +#define ACPI_DEVICE_START(_name, _namestr, _class) \ +static const struct acpi_device_desc __dev_desc_##_name __used \ +__section(".adev.info") = { \ + .name = _namestr, \ + .class = _class, \ + +#define ACPI_DEVICE_END \ +}; + +#endif /* CONFIG_ACPI */ + +#endif /* __ASM_GENERIC_DEVICE_H__ */ + +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ -- 2.41.0
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