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/errno.h> 19 #include <linux/device.h> 20 #include <linux/dma-mapping.h> 21 #include <linux/mod_devicetable.h> 22 23 #include <asm/hvcall.h> 24 #include <asm/scatterlist.h> 25 26 /* 27 * Architecture-specific constants for drivers to 28 * extract attributes of the device using vio_get_attribute() 29 */ 30 #define VETH_MAC_ADDR "local-mac-address" 31 #define VETH_MCAST_FILTER_SIZE "ibm,mac-address-filters" 32 33 /* End architecture-specific constants */ 34 35 #define h_vio_signal(ua, mode) \ 36 plpar_hcall_norets(H_VIO_SIGNAL, ua, mode) 37 38 #define VIO_IRQ_DISABLE 0UL 39 #define VIO_IRQ_ENABLE 1UL 40 41 /* 42 * VIO CMO minimum entitlement for all devices and spare entitlement 43 */ 44 #define VIO_CMO_MIN_ENT 1562624 45 46 extern struct bus_type vio_bus_type; 47 48 struct iommu_table; 49 50 /* 51 * Platform Facilities Option (PFO)-specific data 52 */ 53 54 /* Starting unit address for PFO devices on the VIO BUS */ 55 #define VIO_BASE_PFO_UA 0x50000000 56 57 /** 58 * vio_pfo_op - PFO operation parameters 59 * 60 * @flags: h_call subfunctions and modifiers 61 * @in: Input data block logical real address 62 * @inlen: If non-negative, the length of the input data block. If negative, 63 * the length of the input data descriptor list in bytes. 64 * @out: Output data block logical real address 65 * @outlen: If non-negative, the length of the input data block. If negative, 66 * the length of the input data descriptor list in bytes. 67 * @csbcpb: Logical real address of the 4k naturally-aligned storage block 68 * containing the CSB & optional FC field specific CPB 69 * @timeout: # of milliseconds to retry h_call, 0 for no timeout. 70 * @hcall_err: pointer to return the h_call return value, else NULL 71 */ 72 struct vio_pfo_op { 73 u64 flags; 74 s64 in; 75 s64 inlen; 76 s64 out; 77 s64 outlen; 78 u64 csbcpb; 79 void *done; 80 unsigned long handle; 81 unsigned int timeout; 82 long hcall_err; 83 }; 84 85 /* End PFO specific data */ 86 87 enum vio_dev_family { 88 VDEVICE, /* The OF node is a child of /vdevice */ 89 PFO, /* The OF node is a child of /ibm,platform-facilities */ 90 }; 91 92 /** 93 * vio_dev - This structure is used to describe virtual I/O devices. 94 * 95 * @desired: set from return of driver's get_desired_dma() function 96 * @entitled: bytes of IO data that has been reserved for this device. 97 * @allocated: bytes of IO data currently in use by the device. 98 * @allocs_failed: number of DMA failures due to insufficient entitlement. 99 */ 100 struct vio_dev { 101 const char *name; 102 const char *type; 103 uint32_t unit_address; 104 uint32_t resource_id; 105 unsigned int irq; 106 struct { 107 size_t desired; 108 size_t entitled; 109 size_t allocated; 110 atomic_t allocs_failed; 111 } cmo; 112 enum vio_dev_family family; 113 struct device dev; 114 }; 115 116 struct vio_driver { 117 const char *name; 118 const struct vio_device_id *id_table; 119 int (*probe)(struct vio_dev *dev, const struct vio_device_id *id); 120 int (*remove)(struct vio_dev *dev); 121 /* A driver must have a get_desired_dma() function to 122 * be loaded in a CMO environment if it uses DMA. 123 */ 124 unsigned long (*get_desired_dma)(struct vio_dev *dev); 125 const struct dev_pm_ops *pm; 126 struct device_driver driver; 127 }; 128 129 extern int __vio_register_driver(struct vio_driver *drv, struct module *owner, 130 const char *mod_name); 131 /* 132 * vio_register_driver must be a macro so that KBUILD_MODNAME can be expanded 133 */ 134 #define vio_register_driver(driver) \ 135 __vio_register_driver(driver, THIS_MODULE, KBUILD_MODNAME) 136 extern void vio_unregister_driver(struct vio_driver *drv); 137 138 extern int vio_cmo_entitlement_update(size_t); 139 extern void vio_cmo_set_dev_desired(struct vio_dev *viodev, size_t desired); 140 141 extern void vio_unregister_device(struct vio_dev *dev); 142 143 extern int vio_h_cop_sync(struct vio_dev *vdev, struct vio_pfo_op *op); 144 145 struct device_node; 146 147 extern struct vio_dev *vio_register_device_node( 148 struct device_node *node_vdev); 149 extern const void *vio_get_attribute(struct vio_dev *vdev, char *which, 150 int *length); 151 #ifdef CONFIG_PPC_PSERIES 152 extern struct vio_dev *vio_find_node(struct device_node *vnode); 153 extern int vio_enable_interrupts(struct vio_dev *dev); 154 extern int vio_disable_interrupts(struct vio_dev *dev); 155 #else 156 static inline int vio_enable_interrupts(struct vio_dev *dev) 157 { 158 return 0; 159 } 160 #endif 161 162 static inline struct vio_driver *to_vio_driver(struct device_driver *drv) 163 { 164 return container_of(drv, struct vio_driver, driver); 165 } 166 167 static inline struct vio_dev *to_vio_dev(struct device *dev) 168 { 169 return container_of(dev, struct vio_dev, dev); 170 } 171 172 #endif /* __KERNEL__ */ 173 #endif /* _ASM_POWERPC_VIO_H */ 174