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linux-headers-6.8.0-83
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vio.h
/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * IBM PowerPC Virtual I/O Infrastructure Support. * * Copyright (c) 2003 IBM Corp. * Dave Engebretsen engebret@us.ibm.com * Santiago Leon santil@us.ibm.com */ #ifndef _ASM_POWERPC_VIO_H #define _ASM_POWERPC_VIO_H #ifdef __KERNEL__ #include <linux/errno.h> #include <linux/device.h> #include <linux/dma-mapping.h> #include <linux/mod_devicetable.h> #include <linux/scatterlist.h> #include <asm/hvcall.h> /* * Architecture-specific constants for drivers to * extract attributes of the device using vio_get_attribute() */ #define VETH_MAC_ADDR "local-mac-address" #define VETH_MCAST_FILTER_SIZE "ibm,mac-address-filters" /* End architecture-specific constants */ #define h_vio_signal(ua, mode) \ plpar_hcall_norets(H_VIO_SIGNAL, ua, mode) #define VIO_IRQ_DISABLE 0UL #define VIO_IRQ_ENABLE 1UL /* * VIO CMO minimum entitlement for all devices and spare entitlement */ #define VIO_CMO_MIN_ENT 1562624 extern struct bus_type vio_bus_type; struct iommu_table; /* * Platform Facilities Option (PFO)-specific data */ /* Starting unit address for PFO devices on the VIO BUS */ #define VIO_BASE_PFO_UA 0x50000000 /** * vio_pfo_op - PFO operation parameters * * @flags: h_call subfunctions and modifiers * @in: Input data block logical real address * @inlen: If non-negative, the length of the input data block. If negative, * the length of the input data descriptor list in bytes. * @out: Output data block logical real address * @outlen: If non-negative, the length of the input data block. If negative, * the length of the input data descriptor list in bytes. * @csbcpb: Logical real address of the 4k naturally-aligned storage block * containing the CSB & optional FC field specific CPB * @timeout: # of milliseconds to retry h_call, 0 for no timeout. * @hcall_err: pointer to return the h_call return value, else NULL */ struct vio_pfo_op { u64 flags; s64 in; s64 inlen; s64 out; s64 outlen; u64 csbcpb; void *done; unsigned long handle; unsigned int timeout; long hcall_err; }; /* End PFO specific data */ enum vio_dev_family { VDEVICE, /* The OF node is a child of /vdevice */ PFO, /* The OF node is a child of /ibm,platform-facilities */ }; /** * vio_dev - This structure is used to describe virtual I/O devices. * * @desired: set from return of driver's get_desired_dma() function * @entitled: bytes of IO data that has been reserved for this device. * @allocated: bytes of IO data currently in use by the device. * @allocs_failed: number of DMA failures due to insufficient entitlement. */ struct vio_dev { const char *name; const char *type; uint32_t unit_address; uint32_t resource_id; unsigned int irq; struct { size_t desired; size_t entitled; size_t allocated; atomic_t allocs_failed; } cmo; enum vio_dev_family family; struct device dev; }; struct vio_driver { const char *name; const struct vio_device_id *id_table; int (*probe)(struct vio_dev *dev, const struct vio_device_id *id); void (*remove)(struct vio_dev *dev); void (*shutdown)(struct vio_dev *dev); /* A driver must have a get_desired_dma() function to * be loaded in a CMO environment if it uses DMA. */ unsigned long (*get_desired_dma)(struct vio_dev *dev); const struct dev_pm_ops *pm; struct device_driver driver; }; extern int __vio_register_driver(struct vio_driver *drv, struct module *owner, const char *mod_name); /* * vio_register_driver must be a macro so that KBUILD_MODNAME can be expanded */ #define vio_register_driver(driver) \ __vio_register_driver(driver, THIS_MODULE, KBUILD_MODNAME) extern void vio_unregister_driver(struct vio_driver *drv); extern int vio_cmo_entitlement_update(size_t); extern void vio_cmo_set_dev_desired(struct vio_dev *viodev, size_t desired); extern void vio_unregister_device(struct vio_dev *dev); extern int vio_h_cop_sync(struct vio_dev *vdev, struct vio_pfo_op *op); struct device_node; extern struct vio_dev *vio_register_device_node( struct device_node *node_vdev); extern const void *vio_get_attribute(struct vio_dev *vdev, char *which, int *length); #ifdef CONFIG_PPC_PSERIES extern struct vio_dev *vio_find_node(struct device_node *vnode); extern int vio_enable_interrupts(struct vio_dev *dev); extern int vio_disable_interrupts(struct vio_dev *dev); #else static inline int vio_enable_interrupts(struct vio_dev *dev) { return 0; } #endif static inline struct vio_driver *to_vio_driver(struct device_driver *drv) { return container_of(drv, struct vio_driver, driver); } #define to_vio_dev(__dev) container_of_const(__dev, struct vio_dev, dev) #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_VIO_H */
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