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 47 struct 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 */ 57 struct 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 71 struct vio_driver { 72 const char *name; 73 const struct vio_device_id *id_table; 74 int (*probe)(struct vio_dev *dev, const struct vio_device_id *id); 75 int (*remove)(struct vio_dev *dev); 76 /* A driver must have a get_desired_dma() function to 77 * be loaded in a CMO environment if it uses DMA. 78 */ 79 unsigned long (*get_desired_dma)(struct vio_dev *dev); 80 const struct dev_pm_ops *pm; 81 struct device_driver driver; 82 }; 83 84 extern int __vio_register_driver(struct vio_driver *drv, struct module *owner, 85 const char *mod_name); 86 /* 87 * vio_register_driver must be a macro so that KBUILD_MODNAME can be expanded 88 */ 89 #define vio_register_driver(driver) \ 90 __vio_register_driver(driver, THIS_MODULE, KBUILD_MODNAME) 91 extern void vio_unregister_driver(struct vio_driver *drv); 92 93 extern int vio_cmo_entitlement_update(size_t); 94 extern void vio_cmo_set_dev_desired(struct vio_dev *viodev, size_t desired); 95 96 extern void __devinit vio_unregister_device(struct vio_dev *dev); 97 98 struct device_node; 99 100 extern struct vio_dev *vio_register_device_node( 101 struct device_node *node_vdev); 102 extern const void *vio_get_attribute(struct vio_dev *vdev, char *which, 103 int *length); 104 #ifdef CONFIG_PPC_PSERIES 105 extern struct vio_dev *vio_find_node(struct device_node *vnode); 106 extern int vio_enable_interrupts(struct vio_dev *dev); 107 extern int vio_disable_interrupts(struct vio_dev *dev); 108 #else 109 static inline int vio_enable_interrupts(struct vio_dev *dev) 110 { 111 return 0; 112 } 113 #endif 114 115 static inline struct vio_driver *to_vio_driver(struct device_driver *drv) 116 { 117 return container_of(drv, struct vio_driver, driver); 118 } 119 120 static inline struct vio_dev *to_vio_dev(struct device *dev) 121 { 122 return container_of(dev, struct vio_dev, dev); 123 } 124 125 #endif /* __KERNEL__ */ 126 #endif /* _ASM_POWERPC_VIO_H */ 127