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 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 82 extern int vio_register_driver(struct vio_driver *drv); 83 extern void vio_unregister_driver(struct vio_driver *drv); 84 85 extern int vio_cmo_entitlement_update(size_t); 86 extern void vio_cmo_set_dev_desired(struct vio_dev *viodev, size_t desired); 87 88 extern void __devinit vio_unregister_device(struct vio_dev *dev); 89 90 struct device_node; 91 92 extern struct vio_dev *vio_register_device_node( 93 struct device_node *node_vdev); 94 extern const void *vio_get_attribute(struct vio_dev *vdev, char *which, 95 int *length); 96 #ifdef CONFIG_PPC_PSERIES 97 extern struct vio_dev *vio_find_node(struct device_node *vnode); 98 extern int vio_enable_interrupts(struct vio_dev *dev); 99 extern int vio_disable_interrupts(struct vio_dev *dev); 100 #else 101 static inline int vio_enable_interrupts(struct vio_dev *dev) 102 { 103 return 0; 104 } 105 #endif 106 107 static inline struct vio_driver *to_vio_driver(struct device_driver *drv) 108 { 109 return container_of(drv, struct vio_driver, driver); 110 } 111 112 static 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