119 lines
3.2 KiB
C
119 lines
3.2 KiB
C
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/*
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* IBM PowerPC Virtual I/O Infrastructure Support.
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*
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* Copyright (c) 2003 IBM Corp.
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* Dave Engebretsen engebret@us.ibm.com
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* Santiago Leon santil@us.ibm.com
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _ASM_POWERPC_VIO_H
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#define _ASM_POWERPC_VIO_H
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#ifdef __KERNEL__
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#include <linux/init.h>
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#include <linux/errno.h>
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#include <linux/device.h>
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#include <linux/dma-mapping.h>
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#include <linux/mod_devicetable.h>
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#include <asm/hvcall.h>
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#include <asm/scatterlist.h>
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/*
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* Architecture-specific constants for drivers to
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* extract attributes of the device using vio_get_attribute()
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*/
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#define VETH_MAC_ADDR "local-mac-address"
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#define VETH_MCAST_FILTER_SIZE "ibm,mac-address-filters"
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/* End architecture-specific constants */
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#define h_vio_signal(ua, mode) \
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plpar_hcall_norets(H_VIO_SIGNAL, ua, mode)
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#define VIO_IRQ_DISABLE 0UL
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#define VIO_IRQ_ENABLE 1UL
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/*
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* VIO CMO minimum entitlement for all devices and spare entitlement
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*/
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#define VIO_CMO_MIN_ENT 1562624
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struct iommu_table;
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/**
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* vio_dev - This structure is used to describe virtual I/O devices.
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*
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* @desired: set from return of driver's get_desired_dma() function
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* @entitled: bytes of IO data that has been reserved for this device.
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* @allocated: bytes of IO data currently in use by the device.
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* @allocs_failed: number of DMA failures due to insufficient entitlement.
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*/
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struct vio_dev {
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const char *name;
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const char *type;
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uint32_t unit_address;
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unsigned int irq;
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struct {
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size_t desired;
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size_t entitled;
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size_t allocated;
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atomic_t allocs_failed;
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} cmo;
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struct device dev;
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};
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struct vio_driver {
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const struct vio_device_id *id_table;
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int (*probe)(struct vio_dev *dev, const struct vio_device_id *id);
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int (*remove)(struct vio_dev *dev);
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/* A driver must have a get_desired_dma() function to
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* be loaded in a CMO environment if it uses DMA.
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*/
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unsigned long (*get_desired_dma)(struct vio_dev *dev);
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struct device_driver driver;
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};
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extern int vio_register_driver(struct vio_driver *drv);
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extern void vio_unregister_driver(struct vio_driver *drv);
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extern int vio_cmo_entitlement_update(size_t);
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extern void vio_cmo_set_dev_desired(struct vio_dev *viodev, size_t desired);
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extern void __devinit vio_unregister_device(struct vio_dev *dev);
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struct device_node;
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extern struct vio_dev *vio_register_device_node(
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struct device_node *node_vdev);
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extern const void *vio_get_attribute(struct vio_dev *vdev, char *which,
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int *length);
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#ifdef CONFIG_PPC_PSERIES
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extern struct vio_dev *vio_find_node(struct device_node *vnode);
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extern int vio_enable_interrupts(struct vio_dev *dev);
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extern int vio_disable_interrupts(struct vio_dev *dev);
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#else
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static inline int vio_enable_interrupts(struct vio_dev *dev)
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{
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return 0;
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}
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#endif
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static inline struct vio_driver *to_vio_driver(struct device_driver *drv)
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{
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return container_of(drv, struct vio_driver, driver);
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}
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static inline struct vio_dev *to_vio_dev(struct device *dev)
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{
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return container_of(dev, struct vio_dev, dev);
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}
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#endif /* __KERNEL__ */
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#endif /* _ASM_POWERPC_VIO_H */
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