2 * RapidIO interconnect services
3 * (RapidIO Interconnect Specification, http://www.rapidio.org)
5 * Copyright 2005 MontaVista Software, Inc.
6 * Matt Porter <mporter@kernel.crashing.org>
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.
17 #include <linux/types.h>
18 #include <linux/ioport.h>
19 #include <linux/list.h>
20 #include <linux/errno.h>
21 #include <linux/device.h>
22 #include <linux/rio_regs.h>
23 #ifdef CONFIG_RAPIDIO_DMA_ENGINE
24 #include <linux/dmaengine.h>
27 #define RIO_NO_HOPCOUNT -1
28 #define RIO_INVALID_DESTID 0xffff
30 #define RIO_MAX_MPORTS 8
31 #define RIO_MAX_MPORT_RESOURCES 16
32 #define RIO_MAX_DEV_RESOURCES 16
34 #define RIO_GLOBAL_TABLE 0xff /* Indicates access of a switch's
35 global routing table if it
36 has multiple (or per port)
39 #define RIO_INVALID_ROUTE 0xff /* Indicates that a route table
40 entry is invalid (no route
41 exists for the device ID) */
43 #define RIO_MAX_ROUTE_ENTRIES(size) (size ? (1 << 16) : (1 << 8))
44 #define RIO_ANY_DESTID(size) (size ? 0xffff : 0xff)
46 #define RIO_MAX_MBOX 4
47 #define RIO_MAX_MSG_SIZE 0x1000
50 * Error values that may be returned by RIO functions.
52 #define RIO_SUCCESSFUL 0x00
53 #define RIO_BAD_SIZE 0x81
56 * For RIO devices, the region numbers are assigned this way:
58 * 0 RapidIO outbound doorbells
59 * 1-15 RapidIO memory regions
61 * For RIO master ports, the region number are assigned this way:
63 * 0 RapidIO inbound doorbells
64 * 1 RapidIO inbound mailboxes
65 * 1 RapidIO outbound mailboxes
67 #define RIO_DOORBELL_RESOURCE 0
68 #define RIO_INB_MBOX_RESOURCE 1
69 #define RIO_OUTB_MBOX_RESOURCE 2
71 #define RIO_PW_MSG_SIZE 64
74 * A component tag value (stored in the component tag CSR) is used as device's
75 * unique identifier assigned during enumeration. Besides being used for
76 * identifying switches (which do not have device ID register), it also is used
77 * by error management notification and therefore has to be assigned
78 * to endpoints as well.
80 #define RIO_CTAG_RESRVD 0xfffe0000 /* Reserved */
81 #define RIO_CTAG_UDEVID 0x0001ffff /* Unique device identifier */
83 extern struct bus_type rio_bus_type;
84 extern struct device rio_bus;
85 extern struct list_head rio_devices; /* list of all devices */
92 * struct rio_switch - RIO switch info
93 * @node: Node in global list of switches
94 * @switchid: Switch ID that is unique across a network
95 * @route_table: Copy of switch routing table
96 * @port_ok: Status of each port (one bit per port) - OK=1 or UNINIT=0
97 * @add_entry: Callback for switch-specific route add function
98 * @get_entry: Callback for switch-specific route get function
99 * @clr_table: Callback for switch-specific clear route table function
100 * @set_domain: Callback for switch-specific domain setting function
101 * @get_domain: Callback for switch-specific domain get function
102 * @em_init: Callback for switch-specific error management init function
103 * @em_handle: Callback for switch-specific error management handler function
104 * @sw_sysfs: Callback that initializes switch-specific sysfs attributes
105 * @nextdev: Array of per-port pointers to the next attached device
108 struct list_head node;
112 int (*add_entry) (struct rio_mport *mport, u16 destid, u8 hopcount,
113 u16 table, u16 route_destid, u8 route_port);
114 int (*get_entry) (struct rio_mport *mport, u16 destid, u8 hopcount,
115 u16 table, u16 route_destid, u8 *route_port);
116 int (*clr_table) (struct rio_mport *mport, u16 destid, u8 hopcount,
118 int (*set_domain) (struct rio_mport *mport, u16 destid, u8 hopcount,
120 int (*get_domain) (struct rio_mport *mport, u16 destid, u8 hopcount,
122 int (*em_init) (struct rio_dev *dev);
123 int (*em_handle) (struct rio_dev *dev, u8 swport);
124 int (*sw_sysfs) (struct rio_dev *dev, int create);
125 struct rio_dev *nextdev[0];
129 * struct rio_dev - RIO device info
130 * @global_list: Node in list of all RIO devices
131 * @net_list: Node in list of RIO devices in a network
132 * @net: Network this device is a part of
135 * @device_rev: Device revision
136 * @asm_did: Assembly device ID
137 * @asm_vid: Assembly vendor ID
138 * @asm_rev: Assembly revision
139 * @efptr: Extended feature pointer
140 * @pef: Processing element features
141 * @swpinfo: Switch port info
142 * @src_ops: Source operation capabilities
143 * @dst_ops: Destination operation capabilities
144 * @comp_tag: RIO component tag
145 * @phys_efptr: RIO device extended features pointer
146 * @em_efptr: RIO Error Management features pointer
147 * @dma_mask: Mask of bits of RIO address this device implements
148 * @driver: Driver claiming this device
149 * @dev: Device model device
150 * @riores: RIO resources this device owns
151 * @pwcback: port-write callback function for this device
152 * @destid: Network destination ID (or associated destid for switch)
153 * @hopcount: Hopcount to this device
154 * @prev: Previous RIO device connected to the current one
155 * @rswitch: struct rio_switch (if valid for this device)
158 struct list_head global_list; /* node in list of all RIO devices */
159 struct list_head net_list; /* node in per net list */
160 struct rio_net *net; /* RIO net this device resides in */
176 struct rio_driver *driver; /* RIO driver claiming this device */
177 struct device dev; /* LDM device structure */
178 struct resource riores[RIO_MAX_DEV_RESOURCES];
179 int (*pwcback) (struct rio_dev *rdev, union rio_pw_msg *msg, int step);
182 struct rio_dev *prev;
183 struct rio_switch rswitch[0]; /* RIO switch info */
186 #define rio_dev_g(n) list_entry(n, struct rio_dev, global_list)
187 #define rio_dev_f(n) list_entry(n, struct rio_dev, net_list)
188 #define to_rio_dev(n) container_of(n, struct rio_dev, dev)
189 #define sw_to_rio_dev(n) container_of(n, struct rio_dev, rswitch[0])
192 * struct rio_msg - RIO message event
193 * @res: Mailbox resource
194 * @mcback: Message event callback
197 struct resource *res;
198 void (*mcback) (struct rio_mport * mport, void *dev_id, int mbox, int slot);
202 * struct rio_dbell - RIO doorbell event
203 * @node: Node in list of doorbell events
204 * @res: Doorbell resource
205 * @dinb: Doorbell event callback
206 * @dev_id: Device specific pointer to pass on event
209 struct list_head node;
210 struct resource *res;
211 void (*dinb) (struct rio_mport *mport, void *dev_id, u16 src, u16 dst, u16 info);
221 * struct rio_mport - RIO master port info
222 * @dbells: List of doorbell events
223 * @node: Node in global list of master ports
224 * @nnode: Node in network list of master ports
225 * @iores: I/O mem resource that this master port interface owns
226 * @riores: RIO resources that this master port interfaces owns
227 * @inb_msg: RIO inbound message event descriptors
228 * @outb_msg: RIO outbound message event descriptors
229 * @host_deviceid: Host device ID associated with this master port
230 * @ops: configuration space functions
231 * @id: Port ID, unique among all ports
232 * @index: Port index, unique among all port interfaces of the same type
233 * @sys_size: RapidIO common transport system size
234 * @phy_type: RapidIO phy type
235 * @phys_efptr: RIO port extended features pointer
236 * @name: Port name string
237 * @priv: Master port private data
240 struct list_head dbells; /* list of doorbell events */
241 struct list_head node; /* node in global list of ports */
242 struct list_head nnode; /* node in net list of ports */
243 struct resource iores;
244 struct resource riores[RIO_MAX_MPORT_RESOURCES];
245 struct rio_msg inb_msg[RIO_MAX_MBOX];
246 struct rio_msg outb_msg[RIO_MAX_MBOX];
247 int host_deviceid; /* Host device ID */
248 struct rio_ops *ops; /* low-level architecture-dependent routines */
249 unsigned char id; /* port ID, unique among all ports */
250 unsigned char index; /* port index, unique among all port
251 interfaces of the same type */
252 unsigned int sys_size; /* RapidIO common transport system size.
253 * 0 - Small size. 256 devices.
254 * 1 - Large size, 65536 devices.
256 enum rio_phy_type phy_type; /* RapidIO phy type */
258 unsigned char name[40];
259 void *priv; /* Master port private data */
260 #ifdef CONFIG_RAPIDIO_DMA_ENGINE
261 struct dma_device dma;
266 * struct rio_net - RIO network info
267 * @node: Node in global list of RIO networks
268 * @devices: List of devices in this network
269 * @mports: List of master ports accessing this network
270 * @hport: Default port for accessing this network
271 * @id: RIO network ID
274 struct list_head node; /* node in list of networks */
275 struct list_head devices; /* list of devices in this net */
276 struct list_head mports; /* list of ports accessing net */
277 struct rio_mport *hport; /* primary port for accessing net */
278 unsigned char id; /* RIO network ID */
281 /* Definitions used by switch sysfs initialization callback */
282 #define RIO_SW_SYSFS_CREATE 1 /* Create switch attributes */
283 #define RIO_SW_SYSFS_REMOVE 0 /* Remove switch attributes */
285 /* Low-level architecture-dependent routines */
288 * struct rio_ops - Low-level RIO configuration space operations
289 * @lcread: Callback to perform local (master port) read of config space.
290 * @lcwrite: Callback to perform local (master port) write of config space.
291 * @cread: Callback to perform network read of config space.
292 * @cwrite: Callback to perform network write of config space.
293 * @dsend: Callback to send a doorbell message.
294 * @pwenable: Callback to enable/disable port-write message handling.
295 * @open_outb_mbox: Callback to initialize outbound mailbox.
296 * @close_outb_mbox: Callback to shut down outbound mailbox.
297 * @open_inb_mbox: Callback to initialize inbound mailbox.
298 * @close_inb_mbox: Callback to shut down inbound mailbox.
299 * @add_outb_message: Callback to add a message to an outbound mailbox queue.
300 * @add_inb_buffer: Callback to add a buffer to an inbound mailbox queue.
301 * @get_inb_message: Callback to get a message from an inbound mailbox queue.
304 int (*lcread) (struct rio_mport *mport, int index, u32 offset, int len,
306 int (*lcwrite) (struct rio_mport *mport, int index, u32 offset, int len,
308 int (*cread) (struct rio_mport *mport, int index, u16 destid,
309 u8 hopcount, u32 offset, int len, u32 *data);
310 int (*cwrite) (struct rio_mport *mport, int index, u16 destid,
311 u8 hopcount, u32 offset, int len, u32 data);
312 int (*dsend) (struct rio_mport *mport, int index, u16 destid, u16 data);
313 int (*pwenable) (struct rio_mport *mport, int enable);
314 int (*open_outb_mbox)(struct rio_mport *mport, void *dev_id,
315 int mbox, int entries);
316 void (*close_outb_mbox)(struct rio_mport *mport, int mbox);
317 int (*open_inb_mbox)(struct rio_mport *mport, void *dev_id,
318 int mbox, int entries);
319 void (*close_inb_mbox)(struct rio_mport *mport, int mbox);
320 int (*add_outb_message)(struct rio_mport *mport, struct rio_dev *rdev,
321 int mbox, void *buffer, size_t len);
322 int (*add_inb_buffer)(struct rio_mport *mport, int mbox, void *buf);
323 void *(*get_inb_message)(struct rio_mport *mport, int mbox);
326 #define RIO_RESOURCE_MEM 0x00000100
327 #define RIO_RESOURCE_DOORBELL 0x00000200
328 #define RIO_RESOURCE_MAILBOX 0x00000400
330 #define RIO_RESOURCE_CACHEABLE 0x00010000
331 #define RIO_RESOURCE_PCI 0x00020000
333 #define RIO_RESOURCE_BUSY 0x80000000
336 * struct rio_driver - RIO driver info
337 * @node: Node in list of drivers
338 * @name: RIO driver name
339 * @id_table: RIO device ids to be associated with this driver
340 * @probe: RIO device inserted
341 * @remove: RIO device removed
342 * @suspend: RIO device suspended
343 * @resume: RIO device awakened
344 * @enable_wake: RIO device enable wake event
345 * @driver: LDM driver struct
347 * Provides info on a RIO device driver for insertion/removal and
348 * power management purposes.
351 struct list_head node;
353 const struct rio_device_id *id_table;
354 int (*probe) (struct rio_dev * dev, const struct rio_device_id * id);
355 void (*remove) (struct rio_dev * dev);
356 int (*suspend) (struct rio_dev * dev, u32 state);
357 int (*resume) (struct rio_dev * dev);
358 int (*enable_wake) (struct rio_dev * dev, u32 state, int enable);
359 struct device_driver driver;
362 #define to_rio_driver(drv) container_of(drv,struct rio_driver, driver)
365 * struct rio_device_id - RIO device identifier
366 * @did: RIO device ID
367 * @vid: RIO vendor ID
368 * @asm_did: RIO assembly device ID
369 * @asm_vid: RIO assembly vendor ID
371 * Identifies a RIO device based on both the device/vendor IDs and
372 * the assembly device/vendor IDs.
374 struct rio_device_id {
376 u16 asm_did, asm_vid;
380 * struct rio_switch_ops - Per-switch operations
381 * @vid: RIO vendor ID
382 * @did: RIO device ID
383 * @init_hook: Callback that performs switch device initialization
385 * Defines the operations that are necessary to initialize/control
386 * a particular RIO switch device.
388 struct rio_switch_ops {
390 int (*init_hook) (struct rio_dev *rdev, int do_enum);
395 u32 comptag; /* Component Tag CSR */
396 u32 errdetect; /* Port N Error Detect CSR */
397 u32 is_port; /* Implementation specific + PortID */
398 u32 ltlerrdet; /* LTL Error Detect CSR */
401 u32 raw[RIO_PW_MSG_SIZE/sizeof(u32)];
404 #ifdef CONFIG_RAPIDIO_DMA_ENGINE
407 * enum rio_write_type - RIO write transaction types used in DMA transfers
409 * Note: RapidIO specification defines write (NWRITE) and
410 * write-with-response (NWRITE_R) data transfer operations.
411 * Existing DMA controllers that service RapidIO may use one of these operations
412 * for entire data transfer or their combination with only the last data packet
415 enum rio_write_type {
416 RDW_DEFAULT, /* default method used by DMA driver */
417 RDW_ALL_NWRITE, /* all packets use NWRITE */
418 RDW_ALL_NWRITE_R, /* all packets use NWRITE_R */
419 RDW_LAST_NWRITE_R, /* last packet uses NWRITE_R, others - NWRITE */
424 u64 rio_addr; /* low 64-bits of 66-bit RapidIO address */
425 u8 rio_addr_u; /* upper 2-bits of 66-bit RapidIO address */
426 enum rio_write_type wr_type; /* preferred RIO write operation type */
429 struct rio_dma_data {
430 /* Local data (as scatterlist) */
431 struct scatterlist *sg; /* I/O scatter list */
432 unsigned int sg_len; /* size of scatter list */
433 /* Remote device address (flat buffer) */
434 u64 rio_addr; /* low 64-bits of 66-bit RapidIO address */
435 u8 rio_addr_u; /* upper 2-bits of 66-bit RapidIO address */
436 enum rio_write_type wr_type; /* preferred RIO write operation type */
439 static inline struct rio_mport *dma_to_mport(struct dma_device *ddev)
441 return container_of(ddev, struct rio_mport, dma);
443 #endif /* CONFIG_RAPIDIO_DMA_ENGINE */
445 /* Architecture and hardware-specific functions */
446 extern int rio_register_mport(struct rio_mport *);
447 extern int rio_open_inb_mbox(struct rio_mport *, void *, int, int);
448 extern void rio_close_inb_mbox(struct rio_mport *, int);
449 extern int rio_open_outb_mbox(struct rio_mport *, void *, int, int);
450 extern void rio_close_outb_mbox(struct rio_mport *, int);
452 #endif /* LINUX_RIO_H */