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Stefan Richter77c9a5d2009-06-05 16:26:18 +02001#ifndef _LINUX_FIREWIRE_H
2#define _LINUX_FIREWIRE_H
3
4#include <linux/completion.h>
5#include <linux/device.h>
Jay Fenlasonc76acec2009-05-18 13:08:06 -04006#include <linux/dma-mapping.h>
Stefan Richter77c9a5d2009-06-05 16:26:18 +02007#include <linux/kernel.h>
8#include <linux/kref.h>
9#include <linux/list.h>
10#include <linux/mutex.h>
11#include <linux/spinlock.h>
12#include <linux/sysfs.h>
13#include <linux/timer.h>
14#include <linux/types.h>
15#include <linux/workqueue.h>
16
17#include <asm/atomic.h>
18#include <asm/byteorder.h>
19
20#define fw_notify(s, args...) printk(KERN_NOTICE KBUILD_MODNAME ": " s, ## args)
21#define fw_error(s, args...) printk(KERN_ERR KBUILD_MODNAME ": " s, ## args)
22
Stefan Richter77c9a5d2009-06-05 16:26:18 +020023#define CSR_REGISTER_BASE 0xfffff0000000ULL
24
25/* register offsets are relative to CSR_REGISTER_BASE */
26#define CSR_STATE_CLEAR 0x0
27#define CSR_STATE_SET 0x4
28#define CSR_NODE_IDS 0x8
29#define CSR_RESET_START 0xc
30#define CSR_SPLIT_TIMEOUT_HI 0x18
31#define CSR_SPLIT_TIMEOUT_LO 0x1c
32#define CSR_CYCLE_TIME 0x200
33#define CSR_BUS_TIME 0x204
34#define CSR_BUSY_TIMEOUT 0x210
Clemens Ladischa1a11322010-06-10 08:35:06 +020035#define CSR_PRIORITY_BUDGET 0x218
Stefan Richter77c9a5d2009-06-05 16:26:18 +020036#define CSR_BUS_MANAGER_ID 0x21c
37#define CSR_BANDWIDTH_AVAILABLE 0x220
38#define CSR_CHANNELS_AVAILABLE 0x224
39#define CSR_CHANNELS_AVAILABLE_HI 0x224
40#define CSR_CHANNELS_AVAILABLE_LO 0x228
Clemens Ladisch3d1f46e2010-06-10 08:35:37 +020041#define CSR_MAINT_UTILITY 0x230
Stefan Richter77c9a5d2009-06-05 16:26:18 +020042#define CSR_BROADCAST_CHANNEL 0x234
43#define CSR_CONFIG_ROM 0x400
44#define CSR_CONFIG_ROM_END 0x800
Clemens Ladisch31ef9132011-03-15 07:53:21 +010045#define CSR_OMPR 0x900
46#define CSR_OPCR(i) (0x904 + (i) * 4)
47#define CSR_IMPR 0x980
48#define CSR_IPCR(i) (0x984 + (i) * 4)
Stefan Richter77c9a5d2009-06-05 16:26:18 +020049#define CSR_FCP_COMMAND 0xB00
50#define CSR_FCP_RESPONSE 0xD00
51#define CSR_FCP_END 0xF00
52#define CSR_TOPOLOGY_MAP 0x1000
53#define CSR_TOPOLOGY_MAP_END 0x1400
54#define CSR_SPEED_MAP 0x2000
55#define CSR_SPEED_MAP_END 0x3000
56
57#define CSR_OFFSET 0x40
58#define CSR_LEAF 0x80
59#define CSR_DIRECTORY 0xc0
60
61#define CSR_DESCRIPTOR 0x01
62#define CSR_VENDOR 0x03
63#define CSR_HARDWARE_VERSION 0x04
Stefan Richter77c9a5d2009-06-05 16:26:18 +020064#define CSR_UNIT 0x11
65#define CSR_SPECIFIER_ID 0x12
66#define CSR_VERSION 0x13
67#define CSR_DEPENDENT_INFO 0x14
68#define CSR_MODEL 0x17
Stefan Richter77c9a5d2009-06-05 16:26:18 +020069#define CSR_DIRECTORY_ID 0x20
70
71struct fw_csr_iterator {
Stefan Richter13b302d2009-12-26 01:44:10 +010072 const u32 *p;
73 const u32 *end;
Stefan Richter77c9a5d2009-06-05 16:26:18 +020074};
75
Stefan Richter13b302d2009-12-26 01:44:10 +010076void fw_csr_iterator_init(struct fw_csr_iterator *ci, const u32 *p);
Stefan Richter77c9a5d2009-06-05 16:26:18 +020077int fw_csr_iterator_next(struct fw_csr_iterator *ci, int *key, int *value);
Stefan Richter13b302d2009-12-26 01:44:10 +010078int fw_csr_string(const u32 *directory, int key, char *buf, size_t size);
Clemens Ladisch1f8fef72009-12-24 11:59:57 +010079
Stefan Richter77c9a5d2009-06-05 16:26:18 +020080extern struct bus_type fw_bus_type;
81
82struct fw_card_driver;
83struct fw_node;
84
85struct fw_card {
86 const struct fw_card_driver *driver;
87 struct device *device;
88 struct kref kref;
89 struct completion done;
90
91 int node_id;
92 int generation;
Stefan Richter1e626fd2009-06-14 13:23:58 +020093 int current_tlabel;
94 u64 tlabel_mask;
Stefan Richter77c9a5d2009-06-05 16:26:18 +020095 struct list_head transaction_list;
Clemens Ladische71084a2011-01-22 15:05:03 +010096 u64 reset_jiffies;
Stefan Richter77c9a5d2009-06-05 16:26:18 +020097
Clemens Ladisch8e4b50f2010-06-10 08:26:28 +020098 u32 split_timeout_hi;
99 u32 split_timeout_lo;
100 unsigned int split_timeout_cycles;
101 unsigned int split_timeout_jiffies;
102
Stefan Richter77c9a5d2009-06-05 16:26:18 +0200103 unsigned long long guid;
104 unsigned max_receive;
105 int link_speed;
106 int config_rom_generation;
107
108 spinlock_t lock; /* Take this lock when handling the lists in
109 * this struct. */
110 struct fw_node *local_node;
111 struct fw_node *root_node;
112 struct fw_node *irm_node;
113 u8 color; /* must be u8 to match the definition in struct fw_node */
114 int gap_count;
115 bool beta_repeaters_present;
116
117 int index;
Stefan Richter77c9a5d2009-06-05 16:26:18 +0200118 struct list_head link;
119
Stefan Richterbf54e142010-07-16 22:25:51 +0200120 struct list_head phy_receiver_list;
121
Stefan Richter02d37be2010-07-08 16:09:06 +0200122 struct delayed_work br_work; /* bus reset job */
123 bool br_short;
124
125 struct delayed_work bm_work; /* bus manager job */
Stefan Richter77c9a5d2009-06-05 16:26:18 +0200126 int bm_retries;
127 int bm_generation;
Stefan Richter6fdc0372009-06-20 13:23:59 +0200128 __be32 bm_transaction_data[2];
Stefan Richter250b2b62010-06-21 23:24:35 +0200129 int bm_node_id;
Stefan Richterc8a94de2010-06-12 20:34:50 +0200130 bool bm_abdicate;
Stefan Richter77c9a5d2009-06-05 16:26:18 +0200131
Stefan Richterdb3c9cc2010-06-12 20:30:21 +0200132 bool priority_budget_implemented; /* controller feature */
133 bool broadcast_channel_auto_allocated; /* controller feature */
134
Stefan Richter77c9a5d2009-06-05 16:26:18 +0200135 bool broadcast_channel_allocated;
136 u32 broadcast_channel;
Stefan Richtercb7c96d2009-10-08 00:42:53 +0200137 __be32 topology_map[(CSR_TOPOLOGY_MAP_END - CSR_TOPOLOGY_MAP) / 4];
Clemens Ladisch3d1f46e2010-06-10 08:35:37 +0200138
139 __be32 maint_utility_register;
Stefan Richter77c9a5d2009-06-05 16:26:18 +0200140};
141
Stefan Richter77c9a5d2009-06-05 16:26:18 +0200142struct fw_attribute_group {
143 struct attribute_group *groups[2];
144 struct attribute_group group;
145 struct attribute *attrs[12];
146};
147
148enum fw_device_state {
149 FW_DEVICE_INITIALIZING,
150 FW_DEVICE_RUNNING,
151 FW_DEVICE_GONE,
152 FW_DEVICE_SHUTDOWN,
153};
154
155/*
156 * Note, fw_device.generation always has to be read before fw_device.node_id.
157 * Use SMP memory barriers to ensure this. Otherwise requests will be sent
158 * to an outdated node_id if the generation was updated in the meantime due
159 * to a bus reset.
160 *
161 * Likewise, fw-core will take care to update .node_id before .generation so
162 * that whenever fw_device.generation is current WRT the actual bus generation,
163 * fw_device.node_id is guaranteed to be current too.
164 *
165 * The same applies to fw_device.card->node_id vs. fw_device.generation.
166 *
167 * fw_device.config_rom and fw_device.config_rom_length may be accessed during
168 * the lifetime of any fw_unit belonging to the fw_device, before device_del()
169 * was called on the last fw_unit. Alternatively, they may be accessed while
170 * holding fw_device_rwsem.
171 */
172struct fw_device {
173 atomic_t state;
174 struct fw_node *node;
175 int node_id;
176 int generation;
177 unsigned max_speed;
178 struct fw_card *card;
179 struct device device;
180
181 struct mutex client_list_mutex;
182 struct list_head client_list;
183
Stefan Richter13b302d2009-12-26 01:44:10 +0100184 const u32 *config_rom;
Stefan Richter77c9a5d2009-06-05 16:26:18 +0200185 size_t config_rom_length;
186 int config_rom_retries;
187 unsigned is_local:1;
Stefan Richter837ec782009-06-09 23:56:55 +0200188 unsigned max_rec:4;
Stefan Richter77c9a5d2009-06-05 16:26:18 +0200189 unsigned cmc:1;
Stefan Richter837ec782009-06-09 23:56:55 +0200190 unsigned irmc:1;
Stefan Richter77c9a5d2009-06-05 16:26:18 +0200191 unsigned bc_implemented:2;
192
193 struct delayed_work work;
194 struct fw_attribute_group attribute_group;
195};
196
197static inline struct fw_device *fw_device(struct device *dev)
198{
199 return container_of(dev, struct fw_device, device);
200}
201
202static inline int fw_device_is_shutdown(struct fw_device *device)
203{
204 return atomic_read(&device->state) == FW_DEVICE_SHUTDOWN;
205}
206
207static inline struct fw_device *fw_device_get(struct fw_device *device)
208{
209 get_device(&device->device);
210
211 return device;
212}
213
214static inline void fw_device_put(struct fw_device *device)
215{
216 put_device(&device->device);
217}
218
219int fw_device_enable_phys_dma(struct fw_device *device);
220
221/*
222 * fw_unit.directory must not be accessed after device_del(&fw_unit.device).
223 */
224struct fw_unit {
225 struct device device;
Stefan Richter13b302d2009-12-26 01:44:10 +0100226 const u32 *directory;
Stefan Richter77c9a5d2009-06-05 16:26:18 +0200227 struct fw_attribute_group attribute_group;
228};
229
230static inline struct fw_unit *fw_unit(struct device *dev)
231{
232 return container_of(dev, struct fw_unit, device);
233}
234
235static inline struct fw_unit *fw_unit_get(struct fw_unit *unit)
236{
237 get_device(&unit->device);
238
239 return unit;
240}
241
242static inline void fw_unit_put(struct fw_unit *unit)
243{
244 put_device(&unit->device);
245}
246
Stefan Richtere5110d02009-06-06 18:35:27 +0200247static inline struct fw_device *fw_parent_device(struct fw_unit *unit)
248{
249 return fw_device(unit->device.parent);
250}
251
Stefan Richter77c9a5d2009-06-05 16:26:18 +0200252struct ieee1394_device_id;
253
254struct fw_driver {
255 struct device_driver driver;
256 /* Called when the parent device sits through a bus reset. */
257 void (*update)(struct fw_unit *unit);
258 const struct ieee1394_device_id *id_table;
259};
260
261struct fw_packet;
262struct fw_request;
263
264typedef void (*fw_packet_callback_t)(struct fw_packet *packet,
265 struct fw_card *card, int status);
266typedef void (*fw_transaction_callback_t)(struct fw_card *card, int rcode,
267 void *data, size_t length,
268 void *callback_data);
269/*
Clemens Ladischdb5d2472009-12-24 12:05:58 +0100270 * Important note: Except for the FCP registers, the callback must guarantee
271 * that either fw_send_response() or kfree() is called on the @request.
Stefan Richter77c9a5d2009-06-05 16:26:18 +0200272 */
273typedef void (*fw_address_callback_t)(struct fw_card *card,
274 struct fw_request *request,
275 int tcode, int destination, int source,
Stefan Richter33e553f2010-06-20 22:50:35 +0200276 int generation,
Stefan Richter77c9a5d2009-06-05 16:26:18 +0200277 unsigned long long offset,
278 void *data, size_t length,
279 void *callback_data);
280
281struct fw_packet {
282 int speed;
283 int generation;
284 u32 header[4];
285 size_t header_length;
286 void *payload;
287 size_t payload_length;
288 dma_addr_t payload_bus;
Stefan Richter19593ff2009-10-14 20:40:10 +0200289 bool payload_mapped;
Stefan Richter77c9a5d2009-06-05 16:26:18 +0200290 u32 timestamp;
291
292 /*
Stefan Richter18d0cdf2010-07-18 12:44:01 +0200293 * This callback is called when the packet transmission has completed.
294 * For successful transmission, the status code is the ack received
295 * from the destination. Otherwise it is one of the juju-specific
296 * rcodes: RCODE_SEND_ERROR, _CANCELLED, _BUSY, _GENERATION, _NO_ACK.
Stefan Richter77c9a5d2009-06-05 16:26:18 +0200297 * The callback can be called from tasklet context and thus
298 * must never block.
299 */
300 fw_packet_callback_t callback;
301 int ack;
302 struct list_head link;
303 void *driver_data;
304};
305
306struct fw_transaction {
307 int node_id; /* The generation is implied; it is always the current. */
308 int tlabel;
Stefan Richter77c9a5d2009-06-05 16:26:18 +0200309 struct list_head link;
Clemens Ladisch5c40cbf2010-04-27 09:07:00 +0200310 struct fw_card *card;
Clemens Ladisch410cf2b2010-12-13 14:56:02 +0100311 bool is_split_transaction;
Clemens Ladisch5c40cbf2010-04-27 09:07:00 +0200312 struct timer_list split_timeout_timer;
Stefan Richter77c9a5d2009-06-05 16:26:18 +0200313
314 struct fw_packet packet;
315
316 /*
317 * The data passed to the callback is valid only during the
318 * callback.
319 */
320 fw_transaction_callback_t callback;
321 void *callback_data;
322};
323
324struct fw_address_handler {
325 u64 offset;
326 size_t length;
327 fw_address_callback_t address_callback;
328 void *callback_data;
329 struct list_head link;
330};
331
332struct fw_address_region {
333 u64 start;
334 u64 end;
335};
336
337extern const struct fw_address_region fw_high_memory_region;
338
339int fw_core_add_address_handler(struct fw_address_handler *handler,
340 const struct fw_address_region *region);
341void fw_core_remove_address_handler(struct fw_address_handler *handler);
342void fw_send_response(struct fw_card *card,
343 struct fw_request *request, int rcode);
344void fw_send_request(struct fw_card *card, struct fw_transaction *t,
345 int tcode, int destination_id, int generation, int speed,
346 unsigned long long offset, void *payload, size_t length,
347 fw_transaction_callback_t callback, void *callback_data);
348int fw_cancel_transaction(struct fw_card *card,
349 struct fw_transaction *transaction);
350int fw_run_transaction(struct fw_card *card, int tcode, int destination_id,
351 int generation, int speed, unsigned long long offset,
352 void *payload, size_t length);
353
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400354static inline int fw_stream_packet_destination_id(int tag, int channel, int sy)
355{
356 return tag << 14 | channel << 8 | sy;
357}
358
359struct fw_descriptor {
360 struct list_head link;
361 size_t length;
362 u32 immediate;
363 u32 key;
364 const u32 *data;
365};
366
367int fw_core_add_descriptor(struct fw_descriptor *desc);
368void fw_core_remove_descriptor(struct fw_descriptor *desc);
369
370/*
371 * The iso packet format allows for an immediate header/payload part
372 * stored in 'header' immediately after the packet info plus an
373 * indirect payload part that is pointer to by the 'payload' field.
374 * Applications can use one or the other or both to implement simple
375 * low-bandwidth streaming (e.g. audio) or more advanced
376 * scatter-gather streaming (e.g. assembling video frame automatically).
377 */
378struct fw_iso_packet {
Stefan Richter872e3302010-07-29 18:19:22 +0200379 u16 payload_length; /* Length of indirect payload */
380 u32 interrupt:1; /* Generate interrupt on this packet */
381 u32 skip:1; /* tx: Set to not send packet at all */
382 /* rx: Sync bit, wait for matching sy */
383 u32 tag:2; /* tx: Tag in packet header */
384 u32 sy:4; /* tx: Sy in packet header */
385 u32 header_length:8; /* Length of immediate header */
386 u32 header[0]; /* tx: Top of 1394 isoch. data_block */
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400387};
388
Stefan Richter872e3302010-07-29 18:19:22 +0200389#define FW_ISO_CONTEXT_TRANSMIT 0
390#define FW_ISO_CONTEXT_RECEIVE 1
391#define FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL 2
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400392
393#define FW_ISO_CONTEXT_MATCH_TAG0 1
394#define FW_ISO_CONTEXT_MATCH_TAG1 2
395#define FW_ISO_CONTEXT_MATCH_TAG2 4
396#define FW_ISO_CONTEXT_MATCH_TAG3 8
397#define FW_ISO_CONTEXT_MATCH_ALL_TAGS 15
398
399/*
400 * An iso buffer is just a set of pages mapped for DMA in the
401 * specified direction. Since the pages are to be used for DMA, they
402 * are not mapped into the kernel virtual address space. We store the
403 * DMA address in the page private. The helper function
404 * fw_iso_buffer_map() will map the pages into a given vma.
405 */
406struct fw_iso_buffer {
407 enum dma_data_direction direction;
408 struct page **pages;
409 int page_count;
410};
411
412int fw_iso_buffer_init(struct fw_iso_buffer *buffer, struct fw_card *card,
413 int page_count, enum dma_data_direction direction);
414void fw_iso_buffer_destroy(struct fw_iso_buffer *buffer, struct fw_card *card);
Stefan Richter872e3302010-07-29 18:19:22 +0200415size_t fw_iso_buffer_lookup(struct fw_iso_buffer *buffer, dma_addr_t completed);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400416
417struct fw_iso_context;
418typedef void (*fw_iso_callback_t)(struct fw_iso_context *context,
419 u32 cycle, size_t header_length,
420 void *header, void *data);
Stefan Richter872e3302010-07-29 18:19:22 +0200421typedef void (*fw_iso_mc_callback_t)(struct fw_iso_context *context,
422 dma_addr_t completed, void *data);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400423struct fw_iso_context {
424 struct fw_card *card;
425 int type;
426 int channel;
427 int speed;
428 size_t header_size;
Stefan Richter872e3302010-07-29 18:19:22 +0200429 union {
430 fw_iso_callback_t sc;
431 fw_iso_mc_callback_t mc;
432 } callback;
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400433 void *callback_data;
434};
435
436struct fw_iso_context *fw_iso_context_create(struct fw_card *card,
437 int type, int channel, int speed, size_t header_size,
438 fw_iso_callback_t callback, void *callback_data);
Stefan Richter872e3302010-07-29 18:19:22 +0200439int fw_iso_context_set_channels(struct fw_iso_context *ctx, u64 *channels);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400440int fw_iso_context_queue(struct fw_iso_context *ctx,
441 struct fw_iso_packet *packet,
442 struct fw_iso_buffer *buffer,
443 unsigned long payload);
444int fw_iso_context_start(struct fw_iso_context *ctx,
445 int cycle, int sync, int tags);
446int fw_iso_context_stop(struct fw_iso_context *ctx);
447void fw_iso_context_destroy(struct fw_iso_context *ctx);
Clemens Ladisch31ef9132011-03-15 07:53:21 +0100448void fw_iso_resource_manage(struct fw_card *card, int generation,
449 u64 channels_mask, int *channel, int *bandwidth,
450 bool allocate, __be32 buffer[2]);
Jay Fenlasonc76acec2009-05-18 13:08:06 -0400451
Stefan Richter77c9a5d2009-06-05 16:26:18 +0200452#endif /* _LINUX_FIREWIRE_H */