1/* 2 * IBM PowerPC Virtual I/O Infrastructure Support. 3 * 4 * Copyright (c) 2003 IBM Corp. 5 * Dave Engebretsen engebret@us.ibm.com 6 * Santiago Leon santil@us.ibm.com 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License 10 * as published by the Free Software Foundation; either version 11 * 2 of the License, or (at your option) any later version. 12 */ 13 14#ifndef _ASM_POWERPC_VIO_H 15#define _ASM_POWERPC_VIO_H 16#ifdef __KERNEL__ 17 18#include <linux/init.h> 19#include <linux/errno.h> 20#include <linux/device.h> 21#include <linux/dma-mapping.h> 22#include <linux/mod_devicetable.h> 23 24#include <asm/hvcall.h> 25#include <asm/scatterlist.h> 26 27/* 28 * Architecture-specific constants for drivers to 29 * extract attributes of the device using vio_get_attribute() 30 */ 31#define VETH_MAC_ADDR "local-mac-address" 32#define VETH_MCAST_FILTER_SIZE "ibm,mac-address-filters" 33 34/* End architecture-specific constants */ 35 36#define h_vio_signal(ua, mode) \ 37 plpar_hcall_norets(H_VIO_SIGNAL, ua, mode) 38 39#define VIO_IRQ_DISABLE 0UL 40#define VIO_IRQ_ENABLE 1UL 41 42/* 43 * VIO CMO minimum entitlement for all devices and spare entitlement 44 */ 45#define VIO_CMO_MIN_ENT 1562624 46 47struct iommu_table; 48 49/** 50 * vio_dev - This structure is used to describe virtual I/O devices. 51 * 52 * @desired: set from return of driver's get_desired_dma() function 53 * @entitled: bytes of IO data that has been reserved for this device. 54 * @allocated: bytes of IO data currently in use by the device. 55 * @allocs_failed: number of DMA failures due to insufficient entitlement. 56 */ 57struct vio_dev { 58 const char *name; 59 const char *type; 60 uint32_t unit_address; 61 unsigned int irq; 62 struct { 63 size_t desired; 64 size_t entitled; 65 size_t allocated; 66 atomic_t allocs_failed; 67 } cmo; 68 struct device dev; 69}; 70 71struct vio_driver { 72 const struct vio_device_id *id_table; 73 int (*probe)(struct vio_dev *dev, const struct vio_device_id *id); 74 int (*remove)(struct vio_dev *dev); 75 /* A driver must have a get_desired_dma() function to 76 * be loaded in a CMO environment if it uses DMA. 77 */ 78 unsigned long (*get_desired_dma)(struct vio_dev *dev); 79 struct device_driver driver; 80}; 81 82extern int vio_register_driver(struct vio_driver *drv); 83extern void vio_unregister_driver(struct vio_driver *drv); 84 85extern int vio_cmo_entitlement_update(size_t); 86extern void vio_cmo_set_dev_desired(struct vio_dev *viodev, size_t desired); 87 88extern void __devinit vio_unregister_device(struct vio_dev *dev); 89 90struct device_node; 91 92extern struct vio_dev *vio_register_device_node( 93 struct device_node *node_vdev); 94extern const void *vio_get_attribute(struct vio_dev *vdev, char *which, 95 int *length); 96#ifdef CONFIG_PPC_PSERIES 97extern struct vio_dev *vio_find_node(struct device_node *vnode); 98extern int vio_enable_interrupts(struct vio_dev *dev); 99extern int vio_disable_interrupts(struct vio_dev *dev); 100#else 101static inline int vio_enable_interrupts(struct vio_dev *dev) 102{ 103 return 0; 104} 105#endif 106 107static inline struct vio_driver *to_vio_driver(struct device_driver *drv) 108{ 109 return container_of(drv, struct vio_driver, driver); 110} 111 112static inline struct vio_dev *to_vio_dev(struct device *dev) 113{ 114 return container_of(dev, struct vio_dev, dev); 115} 116 117#endif /* __KERNEL__ */ 118#endif /* _ASM_POWERPC_VIO_H */ 119