2 * IBM PowerPC Virtual I/O Infrastructure Support.
4 * Copyright (c) 2003 IBM Corp.
5 * Dave Engebretsen engebret@us.ibm.com
6 * Santiago Leon santil@us.ibm.com
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.
14 #ifndef _ASM_POWERPC_VIO_H
15 #define _ASM_POWERPC_VIO_H
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>
24 #include <asm/hvcall.h>
25 #include <asm/scatterlist.h>
28 * Architecture-specific constants for drivers to
29 * extract attributes of the device using vio_get_attribute()
31 #define VETH_MAC_ADDR "local-mac-address"
32 #define VETH_MCAST_FILTER_SIZE "ibm,mac-address-filters"
34 /* End architecture-specific constants */
36 #define h_vio_signal(ua, mode) \
37 plpar_hcall_norets(H_VIO_SIGNAL, ua, mode)
39 #define VIO_IRQ_DISABLE 0UL
40 #define VIO_IRQ_ENABLE 1UL
43 * VIO CMO minimum entitlement for all devices and spare entitlement
45 #define VIO_CMO_MIN_ENT 1562624
50 * Platform Facilities Option (PFO)-specific data
53 /* Starting unit address for PFO devices on the VIO BUS */
54 #define VIO_BASE_PFO_UA 0x50000000
57 * vio_pfo_op - PFO operation parameters
59 * @flags: h_call subfunctions and modifiers
60 * @in: Input data block logical real address
61 * @inlen: If non-negative, the length of the input data block. If negative,
62 * the length of the input data descriptor list in bytes.
63 * @out: Output data block logical real address
64 * @outlen: If non-negative, the length of the input data block. If negative,
65 * the length of the input data descriptor list in bytes.
66 * @csbcpb: Logical real address of the 4k naturally-aligned storage block
67 * containing the CSB & optional FC field specific CPB
68 * @timeout: # of milliseconds to retry h_call, 0 for no timeout.
69 * @hcall_err: pointer to return the h_call return value, else NULL
84 /* End PFO specific data */
87 VDEVICE, /* The OF node is a child of /vdevice */
88 PFO, /* The OF node is a child of /ibm,platform-facilities */
92 * vio_dev - This structure is used to describe virtual I/O devices.
94 * @desired: set from return of driver's get_desired_dma() function
95 * @entitled: bytes of IO data that has been reserved for this device.
96 * @allocated: bytes of IO data currently in use by the device.
97 * @allocs_failed: number of DMA failures due to insufficient entitlement.
102 uint32_t unit_address;
103 uint32_t resource_id;
109 atomic_t allocs_failed;
111 enum vio_dev_family family;
117 const struct vio_device_id *id_table;
118 int (*probe)(struct vio_dev *dev, const struct vio_device_id *id);
119 int (*remove)(struct vio_dev *dev);
120 /* A driver must have a get_desired_dma() function to
121 * be loaded in a CMO environment if it uses DMA.
123 unsigned long (*get_desired_dma)(struct vio_dev *dev);
124 const struct dev_pm_ops *pm;
125 struct device_driver driver;
128 extern int __vio_register_driver(struct vio_driver *drv, struct module *owner,
129 const char *mod_name);
131 * vio_register_driver must be a macro so that KBUILD_MODNAME can be expanded
133 #define vio_register_driver(driver) \
134 __vio_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
135 extern void vio_unregister_driver(struct vio_driver *drv);
137 extern int vio_cmo_entitlement_update(size_t);
138 extern void vio_cmo_set_dev_desired(struct vio_dev *viodev, size_t desired);
140 extern void __devinit vio_unregister_device(struct vio_dev *dev);
142 extern int vio_h_cop_sync(struct vio_dev *vdev, struct vio_pfo_op *op);
146 extern struct vio_dev *vio_register_device_node(
147 struct device_node *node_vdev);
148 extern const void *vio_get_attribute(struct vio_dev *vdev, char *which,
150 #ifdef CONFIG_PPC_PSERIES
151 extern struct vio_dev *vio_find_node(struct device_node *vnode);
152 extern int vio_enable_interrupts(struct vio_dev *dev);
153 extern int vio_disable_interrupts(struct vio_dev *dev);
155 static inline int vio_enable_interrupts(struct vio_dev *dev)
161 static inline struct vio_driver *to_vio_driver(struct device_driver *drv)
163 return container_of(drv, struct vio_driver, driver);
166 static inline struct vio_dev *to_vio_dev(struct device *dev)
168 return container_of(dev, struct vio_dev, dev);
171 #endif /* __KERNEL__ */
172 #endif /* _ASM_POWERPC_VIO_H */