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1/*
2 * RapidIO interconnect services
3 * (RapidIO Interconnect Specification, http://www.rapidio.org)
4 *
5 * Copyright 2005 MontaVista Software, Inc.
6 * Matt Porter <mporter@kernel.crashing.org>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 */
13
14#ifndef LINUX_RIO_H
15#define LINUX_RIO_H
16
17#ifdef __KERNEL__
18
19#include <linux/types.h>
20#include <linux/config.h>
21#include <linux/ioport.h>
22#include <linux/list.h>
23#include <linux/errno.h>
24#include <linux/device.h>
25#include <linux/rio_regs.h>
26
27#define RIO_ANY_DESTID 0xff
28#define RIO_NO_HOPCOUNT -1
29
30#define RIO_MAX_MPORT_RESOURCES 16
31#define RIO_MAX_DEV_RESOURCES 16
32
33#define RIO_GLOBAL_TABLE 0xff /* Indicates access of a switch's
34 global routing table if it
35 has multiple (or per port)
36 tables */
37
38#define RIO_INVALID_ROUTE 0xff /* Indicates that a route table
39 entry is invalid (no route
40 exists for the device ID) */
41
42#ifdef CONFIG_RAPIDIO_8_BIT_TRANSPORT
43#define RIO_MAX_ROUTE_ENTRIES (1 << 8)
44#else
45#define RIO_MAX_ROUTE_ENTRIES (1 << 16)
46#endif
47
48#define RIO_MAX_MBOX 4
49#define RIO_MAX_MSG_SIZE 0x1000
50
51/*
52 * Error values that may be returned by RIO functions.
53 */
54#define RIO_SUCCESSFUL 0x00
55#define RIO_BAD_SIZE 0x81
56
57/*
58 * For RIO devices, the region numbers are assigned this way:
59 *
60 * 0 RapidIO outbound doorbells
61 * 1-15 RapidIO memory regions
62 *
63 * For RIO master ports, the region number are assigned this way:
64 *
65 * 0 RapidIO inbound doorbells
66 * 1 RapidIO inbound mailboxes
67 * 1 RapidIO outbound mailboxes
68 */
69#define RIO_DOORBELL_RESOURCE 0
70#define RIO_INB_MBOX_RESOURCE 1
71#define RIO_OUTB_MBOX_RESOURCE 2
72
73extern struct bus_type rio_bus_type;
74extern struct list_head rio_devices; /* list of all devices */
75
76struct rio_mport;
77
78/**
79 * struct rio_dev - RIO device info
80 * @global_list: Node in list of all RIO devices
81 * @net_list: Node in list of RIO devices in a network
82 * @net: Network this device is a part of
83 * @did: Device ID
84 * @vid: Vendor ID
85 * @device_rev: Device revision
86 * @asm_did: Assembly device ID
87 * @asm_vid: Assembly vendor ID
88 * @asm_rev: Assembly revision
89 * @efptr: Extended feature pointer
90 * @pef: Processing element features
91 * @swpinfo: Switch port info
92 * @src_ops: Source operation capabilities
93 * @dst_ops: Destination operation capabilities
94 * @rswitch: Pointer to &struct rio_switch if valid for this device
95 * @driver: Driver claiming this device
96 * @dev: Device model device
97 * @riores: RIO resources this device owns
98 * @destid: Network destination ID
99 */
100struct rio_dev {
101 struct list_head global_list; /* node in list of all RIO devices */
102 struct list_head net_list; /* node in per net list */
103 struct rio_net *net; /* RIO net this device resides in */
104 u16 did;
105 u16 vid;
106 u32 device_rev;
107 u16 asm_did;
108 u16 asm_vid;
109 u16 asm_rev;
110 u16 efptr;
111 u32 pef;
112 u32 swpinfo; /* Only used for switches */
113 u32 src_ops;
114 u32 dst_ops;
115 struct rio_switch *rswitch; /* RIO switch info */
116 struct rio_driver *driver; /* RIO driver claiming this device */
117 struct device dev; /* LDM device structure */
118 struct resource riores[RIO_MAX_DEV_RESOURCES];
119 u16 destid;
120};
121
122#define rio_dev_g(n) list_entry(n, struct rio_dev, global_list)
123#define rio_dev_f(n) list_entry(n, struct rio_dev, net_list)
124#define to_rio_dev(n) container_of(n, struct rio_dev, dev)
125
126/**
127 * struct rio_msg - RIO message event
128 * @res: Mailbox resource
129 * @mcback: Message event callback
130 */
131struct rio_msg {
132 struct resource *res;
133 void (*mcback) (struct rio_mport * mport, int mbox, int slot);
134};
135
136/**
137 * struct rio_dbell - RIO doorbell event
138 * @node: Node in list of doorbell events
139 * @res: Doorbell resource
140 * @dinb: Doorbell event callback
141 */
142struct rio_dbell {
143 struct list_head node;
144 struct resource *res;
145 void (*dinb) (struct rio_mport * mport, u16 src, u16 dst, u16 info);
146};
147
148/**
149 * struct rio_mport - RIO master port info
150 * @dbells: List of doorbell events
151 * @node: Node in global list of master ports
152 * @nnode: Node in network list of master ports
153 * @iores: I/O mem resource that this master port interface owns
154 * @riores: RIO resources that this master port interfaces owns
155 * @inb_msg: RIO inbound message event descriptors
156 * @outb_msg: RIO outbound message event descriptors
157 * @host_deviceid: Host device ID associated with this master port
158 * @ops: configuration space functions
159 * @id: Port ID, unique among all ports
160 * @index: Port index, unique among all port interfaces of the same type
161 * @name: Port name string
162 */
163struct rio_mport {
164 struct list_head dbells; /* list of doorbell events */
165 struct list_head node; /* node in global list of ports */
166 struct list_head nnode; /* node in net list of ports */
167 struct resource iores;
168 struct resource riores[RIO_MAX_MPORT_RESOURCES];
169 struct rio_msg inb_msg[RIO_MAX_MBOX];
170 struct rio_msg outb_msg[RIO_MAX_MBOX];
171 int host_deviceid; /* Host device ID */
172 struct rio_ops *ops; /* maintenance transaction functions */
173 unsigned char id; /* port ID, unique among all ports */
174 unsigned char index; /* port index, unique among all port
175 interfaces of the same type */
176 unsigned char name[40];
177};
178
179/**
180 * struct rio_net - RIO network info
181 * @node: Node in global list of RIO networks
182 * @devices: List of devices in this network
183 * @mports: List of master ports accessing this network
184 * @hport: Default port for accessing this network
185 * @id: RIO network ID
186 */
187struct rio_net {
188 struct list_head node; /* node in list of networks */
189 struct list_head devices; /* list of devices in this net */
190 struct list_head mports; /* list of ports accessing net */
191 struct rio_mport *hport; /* primary port for accessing net */
192 unsigned char id; /* RIO network ID */
193};
194
195/**
196 * struct rio_switch - RIO switch info
197 * @node: Node in global list of switches
198 * @switchid: Switch ID that is unique across a network
199 * @hopcount: Hopcount to this switch
200 * @destid: Associated destid in the path
201 * @route_table: Copy of switch routing table
202 * @add_entry: Callback for switch-specific route add function
203 * @get_entry: Callback for switch-specific route get function
204 */
205struct rio_switch {
206 struct list_head node;
207 u16 switchid;
208 u16 hopcount;
209 u16 destid;
210 u8 route_table[RIO_MAX_ROUTE_ENTRIES];
211 int (*add_entry) (struct rio_mport * mport, u16 destid, u8 hopcount,
212 u16 table, u16 route_destid, u8 route_port);
213 int (*get_entry) (struct rio_mport * mport, u16 destid, u8 hopcount,
214 u16 table, u16 route_destid, u8 * route_port);
215};
216
217/* Low-level architecture-dependent routines */
218
219/**
220 * struct rio_ops - Low-level RIO configuration space operations
221 * @lcread: Callback to perform local (master port) read of config space.
222 * @lcwrite: Callback to perform local (master port) write of config space.
223 * @cread: Callback to perform network read of config space.
224 * @cwrite: Callback to perform network write of config space.
225 * @dsend: Callback to send a doorbell message.
226 */
227struct rio_ops {
228 int (*lcread) (int index, u32 offset, int len, u32 * data);
229 int (*lcwrite) (int index, u32 offset, int len, u32 data);
230 int (*cread) (int index, u16 destid, u8 hopcount, u32 offset, int len,
231 u32 * data);
232 int (*cwrite) (int index, u16 destid, u8 hopcount, u32 offset, int len,
233 u32 data);
234 int (*dsend) (int index, u16 destid, u16 data);
235};
236
237#define RIO_RESOURCE_MEM 0x00000100
238#define RIO_RESOURCE_DOORBELL 0x00000200
239#define RIO_RESOURCE_MAILBOX 0x00000400
240
241#define RIO_RESOURCE_CACHEABLE 0x00010000
242#define RIO_RESOURCE_PCI 0x00020000
243
244#define RIO_RESOURCE_BUSY 0x80000000
245
246/**
247 * struct rio_driver - RIO driver info
248 * @node: Node in list of drivers
249 * @name: RIO driver name
250 * @id_table: RIO device ids to be associated with this driver
251 * @probe: RIO device inserted
252 * @remove: RIO device removed
253 * @suspend: RIO device suspended
254 * @resume: RIO device awakened
255 * @enable_wake: RIO device enable wake event
256 * @driver: LDM driver struct
257 *
258 * Provides info on a RIO device driver for insertion/removal and
259 * power management purposes.
260 */
261struct rio_driver {
262 struct list_head node;
263 char *name;
264 const struct rio_device_id *id_table;
265 int (*probe) (struct rio_dev * dev, const struct rio_device_id * id);
266 void (*remove) (struct rio_dev * dev);
267 int (*suspend) (struct rio_dev * dev, u32 state);
268 int (*resume) (struct rio_dev * dev);
269 int (*enable_wake) (struct rio_dev * dev, u32 state, int enable);
270 struct device_driver driver;
271};
272
273#define to_rio_driver(drv) container_of(drv,struct rio_driver, driver)
274
275/**
276 * struct rio_device_id - RIO device identifier
277 * @did: RIO device ID
278 * @vid: RIO vendor ID
279 * @asm_did: RIO assembly device ID
280 * @asm_vid: RIO assembly vendor ID
281 *
282 * Identifies a RIO device based on both the device/vendor IDs and
283 * the assembly device/vendor IDs.
284 */
285struct rio_device_id {
286 u16 did, vid;
287 u16 asm_did, asm_vid;
288};
289
290/**
291 * struct rio_route_ops - Per-switch route operations
292 * @vid: RIO vendor ID
293 * @did: RIO device ID
294 * @add_hook: Callback that adds a route entry
295 * @get_hook: Callback that gets a route entry
296 *
297 * Defines the operations that are necessary to manipulate the route
298 * tables for a particular RIO switch device.
299 */
300struct rio_route_ops {
301 u16 vid, did;
302 int (*add_hook) (struct rio_mport * mport, u16 destid, u8 hopcount,
303 u16 table, u16 route_destid, u8 route_port);
304 int (*get_hook) (struct rio_mport * mport, u16 destid, u8 hopcount,
305 u16 table, u16 route_destid, u8 * route_port);
306};
307
308/* Architecture and hardware-specific functions */
309extern int rio_init_mports(void);
310extern void rio_register_mport(struct rio_mport *);
311extern int rio_hw_add_outb_message(struct rio_mport *, struct rio_dev *, int,
312 void *, size_t);
313extern int rio_hw_add_inb_buffer(struct rio_mport *, int, void *);
314extern void *rio_hw_get_inb_message(struct rio_mport *, int);
315extern int rio_open_inb_mbox(struct rio_mport *, int, int);
316extern void rio_close_inb_mbox(struct rio_mport *, int);
317extern int rio_open_outb_mbox(struct rio_mport *, int, int);
318extern void rio_close_outb_mbox(struct rio_mport *, int);
319
320#endif /* __KERNEL__ */
321#endif /* LINUX_RIO_H */
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