Commit | Line | Data |
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2874c5fd | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
1da177e4 LT |
2 | /* |
3 | * IBM PowerPC Virtual I/O Infrastructure Support. | |
4 | * | |
f38d87f5 SR |
5 | * Copyright (c) 2003 IBM Corp. |
6 | * Dave Engebretsen engebret@us.ibm.com | |
7 | * Santiago Leon santil@us.ibm.com | |
1da177e4 LT |
8 | */ |
9 | ||
f38d87f5 SR |
10 | #ifndef _ASM_POWERPC_VIO_H |
11 | #define _ASM_POWERPC_VIO_H | |
88ced031 | 12 | #ifdef __KERNEL__ |
1da177e4 | 13 | |
1da177e4 LT |
14 | #include <linux/errno.h> |
15 | #include <linux/device.h> | |
16 | #include <linux/dma-mapping.h> | |
fb120da6 | 17 | #include <linux/mod_devicetable.h> |
84be456f | 18 | #include <linux/scatterlist.h> |
71d276d7 | 19 | |
1da177e4 | 20 | #include <asm/hvcall.h> |
71d276d7 SR |
21 | |
22 | /* | |
1da177e4 LT |
23 | * Architecture-specific constants for drivers to |
24 | * extract attributes of the device using vio_get_attribute() | |
71d276d7 | 25 | */ |
1da177e4 LT |
26 | #define VETH_MAC_ADDR "local-mac-address" |
27 | #define VETH_MCAST_FILTER_SIZE "ibm,mac-address-filters" | |
28 | ||
29 | /* End architecture-specific constants */ | |
30 | ||
31 | #define h_vio_signal(ua, mode) \ | |
32 | plpar_hcall_norets(H_VIO_SIGNAL, ua, mode) | |
33 | ||
34 | #define VIO_IRQ_DISABLE 0UL | |
35 | #define VIO_IRQ_ENABLE 1UL | |
36 | ||
a90ab95a RJ |
37 | /* |
38 | * VIO CMO minimum entitlement for all devices and spare entitlement | |
39 | */ | |
40 | #define VIO_CMO_MIN_ENT 1562624 | |
41 | ||
a9803497 AB |
42 | extern struct bus_type vio_bus_type; |
43 | ||
1da177e4 LT |
44 | struct iommu_table; |
45 | ||
f2ab6219 KY |
46 | /* |
47 | * Platform Facilities Option (PFO)-specific data | |
48 | */ | |
49 | ||
50 | /* Starting unit address for PFO devices on the VIO BUS */ | |
51 | #define VIO_BASE_PFO_UA 0x50000000 | |
52 | ||
53 | /** | |
54 | * vio_pfo_op - PFO operation parameters | |
55 | * | |
56 | * @flags: h_call subfunctions and modifiers | |
57 | * @in: Input data block logical real address | |
58 | * @inlen: If non-negative, the length of the input data block. If negative, | |
59 | * the length of the input data descriptor list in bytes. | |
60 | * @out: Output data block logical real address | |
61 | * @outlen: If non-negative, the length of the input data block. If negative, | |
62 | * the length of the input data descriptor list in bytes. | |
63 | * @csbcpb: Logical real address of the 4k naturally-aligned storage block | |
64 | * containing the CSB & optional FC field specific CPB | |
65 | * @timeout: # of milliseconds to retry h_call, 0 for no timeout. | |
66 | * @hcall_err: pointer to return the h_call return value, else NULL | |
67 | */ | |
68 | struct vio_pfo_op { | |
69 | u64 flags; | |
70 | s64 in; | |
71 | s64 inlen; | |
72 | s64 out; | |
73 | s64 outlen; | |
74 | u64 csbcpb; | |
75 | void *done; | |
76 | unsigned long handle; | |
77 | unsigned int timeout; | |
78 | long hcall_err; | |
79 | }; | |
80 | ||
81 | /* End PFO specific data */ | |
82 | ||
83 | enum vio_dev_family { | |
84 | VDEVICE, /* The OF node is a child of /vdevice */ | |
85 | PFO, /* The OF node is a child of /ibm,platform-facilities */ | |
86 | }; | |
87 | ||
a90ab95a RJ |
88 | /** |
89 | * vio_dev - This structure is used to describe virtual I/O devices. | |
90 | * | |
91 | * @desired: set from return of driver's get_desired_dma() function | |
92 | * @entitled: bytes of IO data that has been reserved for this device. | |
93 | * @allocated: bytes of IO data currently in use by the device. | |
94 | * @allocs_failed: number of DMA failures due to insufficient entitlement. | |
71d276d7 SR |
95 | */ |
96 | struct vio_dev { | |
a7f67bdf JK |
97 | const char *name; |
98 | const char *type; | |
71d276d7 | 99 | uint32_t unit_address; |
f2ab6219 | 100 | uint32_t resource_id; |
71d276d7 | 101 | unsigned int irq; |
a90ab95a RJ |
102 | struct { |
103 | size_t desired; | |
104 | size_t entitled; | |
105 | size_t allocated; | |
106 | atomic_t allocs_failed; | |
107 | } cmo; | |
f2ab6219 | 108 | enum vio_dev_family family; |
71d276d7 SR |
109 | struct device dev; |
110 | }; | |
1da177e4 | 111 | |
1da177e4 | 112 | struct vio_driver { |
cb52d897 | 113 | const char *name; |
71d276d7 SR |
114 | const struct vio_device_id *id_table; |
115 | int (*probe)(struct vio_dev *dev, const struct vio_device_id *id); | |
116 | int (*remove)(struct vio_dev *dev); | |
a90ab95a RJ |
117 | /* A driver must have a get_desired_dma() function to |
118 | * be loaded in a CMO environment if it uses DMA. | |
119 | */ | |
120 | unsigned long (*get_desired_dma)(struct vio_dev *dev); | |
cb52d897 | 121 | const struct dev_pm_ops *pm; |
1da177e4 LT |
122 | struct device_driver driver; |
123 | }; | |
124 | ||
cb52d897 BH |
125 | extern int __vio_register_driver(struct vio_driver *drv, struct module *owner, |
126 | const char *mod_name); | |
127 | /* | |
128 | * vio_register_driver must be a macro so that KBUILD_MODNAME can be expanded | |
129 | */ | |
130 | #define vio_register_driver(driver) \ | |
131 | __vio_register_driver(driver, THIS_MODULE, KBUILD_MODNAME) | |
71d276d7 SR |
132 | extern void vio_unregister_driver(struct vio_driver *drv); |
133 | ||
a90ab95a RJ |
134 | extern int vio_cmo_entitlement_update(size_t); |
135 | extern void vio_cmo_set_dev_desired(struct vio_dev *viodev, size_t desired); | |
136 | ||
cad5cef6 | 137 | extern void vio_unregister_device(struct vio_dev *dev); |
71d276d7 | 138 | |
f2ab6219 KY |
139 | extern int vio_h_cop_sync(struct vio_dev *vdev, struct vio_pfo_op *op); |
140 | ||
71d276d7 SR |
141 | struct device_node; |
142 | ||
de7d812d | 143 | extern struct vio_dev *vio_register_device_node( |
71d276d7 | 144 | struct device_node *node_vdev); |
e10fa773 | 145 | extern const void *vio_get_attribute(struct vio_dev *vdev, char *which, |
71d276d7 | 146 | int *length); |
e10fa773 SR |
147 | #ifdef CONFIG_PPC_PSERIES |
148 | extern struct vio_dev *vio_find_node(struct device_node *vnode); | |
71d276d7 SR |
149 | extern int vio_enable_interrupts(struct vio_dev *dev); |
150 | extern int vio_disable_interrupts(struct vio_dev *dev); | |
56a4c6e3 SR |
151 | #else |
152 | static inline int vio_enable_interrupts(struct vio_dev *dev) | |
153 | { | |
154 | return 0; | |
155 | } | |
71d276d7 SR |
156 | #endif |
157 | ||
1da177e4 LT |
158 | static inline struct vio_driver *to_vio_driver(struct device_driver *drv) |
159 | { | |
160 | return container_of(drv, struct vio_driver, driver); | |
161 | } | |
162 | ||
1da177e4 LT |
163 | static inline struct vio_dev *to_vio_dev(struct device *dev) |
164 | { | |
165 | return container_of(dev, struct vio_dev, dev); | |
166 | } | |
167 | ||
88ced031 | 168 | #endif /* __KERNEL__ */ |
f38d87f5 | 169 | #endif /* _ASM_POWERPC_VIO_H */ |