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77c9a5da SR |
1 | #ifndef _LINUX_FIREWIRE_H |
2 | #define _LINUX_FIREWIRE_H | |
3 | ||
4 | #include <linux/completion.h> | |
5 | #include <linux/device.h> | |
c76acec6 | 6 | #include <linux/dma-mapping.h> |
77c9a5da SR |
7 | #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 | ||
77c9a5da SR |
23 | #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 | |
35 | #define CSR_BUS_MANAGER_ID 0x21c | |
36 | #define CSR_BANDWIDTH_AVAILABLE 0x220 | |
37 | #define CSR_CHANNELS_AVAILABLE 0x224 | |
38 | #define CSR_CHANNELS_AVAILABLE_HI 0x224 | |
39 | #define CSR_CHANNELS_AVAILABLE_LO 0x228 | |
40 | #define CSR_BROADCAST_CHANNEL 0x234 | |
41 | #define CSR_CONFIG_ROM 0x400 | |
42 | #define CSR_CONFIG_ROM_END 0x800 | |
43 | #define CSR_FCP_COMMAND 0xB00 | |
44 | #define CSR_FCP_RESPONSE 0xD00 | |
45 | #define CSR_FCP_END 0xF00 | |
46 | #define CSR_TOPOLOGY_MAP 0x1000 | |
47 | #define CSR_TOPOLOGY_MAP_END 0x1400 | |
48 | #define CSR_SPEED_MAP 0x2000 | |
49 | #define CSR_SPEED_MAP_END 0x3000 | |
50 | ||
51 | #define CSR_OFFSET 0x40 | |
52 | #define CSR_LEAF 0x80 | |
53 | #define CSR_DIRECTORY 0xc0 | |
54 | ||
55 | #define CSR_DESCRIPTOR 0x01 | |
56 | #define CSR_VENDOR 0x03 | |
57 | #define CSR_HARDWARE_VERSION 0x04 | |
77c9a5da SR |
58 | #define CSR_UNIT 0x11 |
59 | #define CSR_SPECIFIER_ID 0x12 | |
60 | #define CSR_VERSION 0x13 | |
61 | #define CSR_DEPENDENT_INFO 0x14 | |
62 | #define CSR_MODEL 0x17 | |
77c9a5da SR |
63 | #define CSR_DIRECTORY_ID 0x20 |
64 | ||
65 | struct fw_csr_iterator { | |
13b302d0 SR |
66 | const u32 *p; |
67 | const u32 *end; | |
77c9a5da SR |
68 | }; |
69 | ||
13b302d0 | 70 | void fw_csr_iterator_init(struct fw_csr_iterator *ci, const u32 *p); |
77c9a5da | 71 | int fw_csr_iterator_next(struct fw_csr_iterator *ci, int *key, int *value); |
13b302d0 | 72 | int fw_csr_string(const u32 *directory, int key, char *buf, size_t size); |
1f8fef7b | 73 | |
77c9a5da SR |
74 | extern struct bus_type fw_bus_type; |
75 | ||
76 | struct fw_card_driver; | |
77 | struct fw_node; | |
78 | ||
79 | struct fw_card { | |
80 | const struct fw_card_driver *driver; | |
81 | struct device *device; | |
82 | struct kref kref; | |
83 | struct completion done; | |
84 | ||
85 | int node_id; | |
86 | int generation; | |
1e626fdc SR |
87 | int current_tlabel; |
88 | u64 tlabel_mask; | |
77c9a5da | 89 | struct list_head transaction_list; |
77c9a5da SR |
90 | unsigned long reset_jiffies; |
91 | ||
92 | unsigned long long guid; | |
93 | unsigned max_receive; | |
94 | int link_speed; | |
95 | int config_rom_generation; | |
96 | ||
97 | spinlock_t lock; /* Take this lock when handling the lists in | |
98 | * this struct. */ | |
99 | struct fw_node *local_node; | |
100 | struct fw_node *root_node; | |
101 | struct fw_node *irm_node; | |
102 | u8 color; /* must be u8 to match the definition in struct fw_node */ | |
103 | int gap_count; | |
104 | bool beta_repeaters_present; | |
105 | ||
106 | int index; | |
107 | ||
108 | struct list_head link; | |
109 | ||
110 | /* Work struct for BM duties. */ | |
111 | struct delayed_work work; | |
112 | int bm_retries; | |
113 | int bm_generation; | |
6fdc0370 | 114 | __be32 bm_transaction_data[2]; |
77c9a5da SR |
115 | |
116 | bool broadcast_channel_allocated; | |
117 | u32 broadcast_channel; | |
cb7c96da | 118 | __be32 topology_map[(CSR_TOPOLOGY_MAP_END - CSR_TOPOLOGY_MAP) / 4]; |
77c9a5da SR |
119 | }; |
120 | ||
77c9a5da SR |
121 | struct fw_attribute_group { |
122 | struct attribute_group *groups[2]; | |
123 | struct attribute_group group; | |
124 | struct attribute *attrs[12]; | |
125 | }; | |
126 | ||
127 | enum fw_device_state { | |
128 | FW_DEVICE_INITIALIZING, | |
129 | FW_DEVICE_RUNNING, | |
130 | FW_DEVICE_GONE, | |
131 | FW_DEVICE_SHUTDOWN, | |
132 | }; | |
133 | ||
134 | /* | |
135 | * Note, fw_device.generation always has to be read before fw_device.node_id. | |
136 | * Use SMP memory barriers to ensure this. Otherwise requests will be sent | |
137 | * to an outdated node_id if the generation was updated in the meantime due | |
138 | * to a bus reset. | |
139 | * | |
140 | * Likewise, fw-core will take care to update .node_id before .generation so | |
141 | * that whenever fw_device.generation is current WRT the actual bus generation, | |
142 | * fw_device.node_id is guaranteed to be current too. | |
143 | * | |
144 | * The same applies to fw_device.card->node_id vs. fw_device.generation. | |
145 | * | |
146 | * fw_device.config_rom and fw_device.config_rom_length may be accessed during | |
147 | * the lifetime of any fw_unit belonging to the fw_device, before device_del() | |
148 | * was called on the last fw_unit. Alternatively, they may be accessed while | |
149 | * holding fw_device_rwsem. | |
150 | */ | |
151 | struct fw_device { | |
152 | atomic_t state; | |
153 | struct fw_node *node; | |
154 | int node_id; | |
155 | int generation; | |
156 | unsigned max_speed; | |
157 | struct fw_card *card; | |
158 | struct device device; | |
159 | ||
160 | struct mutex client_list_mutex; | |
161 | struct list_head client_list; | |
162 | ||
13b302d0 | 163 | const u32 *config_rom; |
77c9a5da SR |
164 | size_t config_rom_length; |
165 | int config_rom_retries; | |
166 | unsigned is_local:1; | |
837ec787 | 167 | unsigned max_rec:4; |
77c9a5da | 168 | unsigned cmc:1; |
837ec787 | 169 | unsigned irmc:1; |
77c9a5da SR |
170 | unsigned bc_implemented:2; |
171 | ||
172 | struct delayed_work work; | |
173 | struct fw_attribute_group attribute_group; | |
174 | }; | |
175 | ||
176 | static inline struct fw_device *fw_device(struct device *dev) | |
177 | { | |
178 | return container_of(dev, struct fw_device, device); | |
179 | } | |
180 | ||
181 | static inline int fw_device_is_shutdown(struct fw_device *device) | |
182 | { | |
183 | return atomic_read(&device->state) == FW_DEVICE_SHUTDOWN; | |
184 | } | |
185 | ||
186 | static inline struct fw_device *fw_device_get(struct fw_device *device) | |
187 | { | |
188 | get_device(&device->device); | |
189 | ||
190 | return device; | |
191 | } | |
192 | ||
193 | static inline void fw_device_put(struct fw_device *device) | |
194 | { | |
195 | put_device(&device->device); | |
196 | } | |
197 | ||
198 | int fw_device_enable_phys_dma(struct fw_device *device); | |
199 | ||
200 | /* | |
201 | * fw_unit.directory must not be accessed after device_del(&fw_unit.device). | |
202 | */ | |
203 | struct fw_unit { | |
204 | struct device device; | |
13b302d0 | 205 | const u32 *directory; |
77c9a5da SR |
206 | struct fw_attribute_group attribute_group; |
207 | }; | |
208 | ||
209 | static inline struct fw_unit *fw_unit(struct device *dev) | |
210 | { | |
211 | return container_of(dev, struct fw_unit, device); | |
212 | } | |
213 | ||
214 | static inline struct fw_unit *fw_unit_get(struct fw_unit *unit) | |
215 | { | |
216 | get_device(&unit->device); | |
217 | ||
218 | return unit; | |
219 | } | |
220 | ||
221 | static inline void fw_unit_put(struct fw_unit *unit) | |
222 | { | |
223 | put_device(&unit->device); | |
224 | } | |
225 | ||
e5110d01 SR |
226 | static inline struct fw_device *fw_parent_device(struct fw_unit *unit) |
227 | { | |
228 | return fw_device(unit->device.parent); | |
229 | } | |
230 | ||
77c9a5da SR |
231 | struct ieee1394_device_id; |
232 | ||
233 | struct fw_driver { | |
234 | struct device_driver driver; | |
235 | /* Called when the parent device sits through a bus reset. */ | |
236 | void (*update)(struct fw_unit *unit); | |
237 | const struct ieee1394_device_id *id_table; | |
238 | }; | |
239 | ||
240 | struct fw_packet; | |
241 | struct fw_request; | |
242 | ||
243 | typedef void (*fw_packet_callback_t)(struct fw_packet *packet, | |
244 | struct fw_card *card, int status); | |
245 | typedef void (*fw_transaction_callback_t)(struct fw_card *card, int rcode, | |
246 | void *data, size_t length, | |
247 | void *callback_data); | |
248 | /* | |
db5d247a CL |
249 | * Important note: Except for the FCP registers, the callback must guarantee |
250 | * that either fw_send_response() or kfree() is called on the @request. | |
77c9a5da SR |
251 | */ |
252 | typedef void (*fw_address_callback_t)(struct fw_card *card, | |
253 | struct fw_request *request, | |
254 | int tcode, int destination, int source, | |
255 | int generation, int speed, | |
256 | unsigned long long offset, | |
257 | void *data, size_t length, | |
258 | void *callback_data); | |
259 | ||
260 | struct fw_packet { | |
261 | int speed; | |
262 | int generation; | |
263 | u32 header[4]; | |
264 | size_t header_length; | |
265 | void *payload; | |
266 | size_t payload_length; | |
267 | dma_addr_t payload_bus; | |
19593ffd | 268 | bool payload_mapped; |
77c9a5da SR |
269 | u32 timestamp; |
270 | ||
271 | /* | |
272 | * This callback is called when the packet transmission has | |
273 | * completed; for successful transmission, the status code is | |
274 | * the ack received from the destination, otherwise it's a | |
275 | * negative errno: ENOMEM, ESTALE, ETIMEDOUT, ENODEV, EIO. | |
276 | * The callback can be called from tasklet context and thus | |
277 | * must never block. | |
278 | */ | |
279 | fw_packet_callback_t callback; | |
280 | int ack; | |
281 | struct list_head link; | |
282 | void *driver_data; | |
283 | }; | |
284 | ||
285 | struct fw_transaction { | |
286 | int node_id; /* The generation is implied; it is always the current. */ | |
287 | int tlabel; | |
288 | int timestamp; | |
289 | struct list_head link; | |
5c40cbfe CL |
290 | struct fw_card *card; |
291 | struct timer_list split_timeout_timer; | |
77c9a5da SR |
292 | |
293 | struct fw_packet packet; | |
294 | ||
295 | /* | |
296 | * The data passed to the callback is valid only during the | |
297 | * callback. | |
298 | */ | |
299 | fw_transaction_callback_t callback; | |
300 | void *callback_data; | |
301 | }; | |
302 | ||
303 | struct fw_address_handler { | |
304 | u64 offset; | |
305 | size_t length; | |
306 | fw_address_callback_t address_callback; | |
307 | void *callback_data; | |
308 | struct list_head link; | |
309 | }; | |
310 | ||
311 | struct fw_address_region { | |
312 | u64 start; | |
313 | u64 end; | |
314 | }; | |
315 | ||
316 | extern const struct fw_address_region fw_high_memory_region; | |
317 | ||
318 | int fw_core_add_address_handler(struct fw_address_handler *handler, | |
319 | const struct fw_address_region *region); | |
320 | void fw_core_remove_address_handler(struct fw_address_handler *handler); | |
321 | void fw_send_response(struct fw_card *card, | |
322 | struct fw_request *request, int rcode); | |
323 | void fw_send_request(struct fw_card *card, struct fw_transaction *t, | |
324 | int tcode, int destination_id, int generation, int speed, | |
325 | unsigned long long offset, void *payload, size_t length, | |
326 | fw_transaction_callback_t callback, void *callback_data); | |
327 | int fw_cancel_transaction(struct fw_card *card, | |
328 | struct fw_transaction *transaction); | |
329 | int fw_run_transaction(struct fw_card *card, int tcode, int destination_id, | |
330 | int generation, int speed, unsigned long long offset, | |
331 | void *payload, size_t length); | |
332 | ||
c76acec6 JF |
333 | static inline int fw_stream_packet_destination_id(int tag, int channel, int sy) |
334 | { | |
335 | return tag << 14 | channel << 8 | sy; | |
336 | } | |
337 | ||
338 | struct fw_descriptor { | |
339 | struct list_head link; | |
340 | size_t length; | |
341 | u32 immediate; | |
342 | u32 key; | |
343 | const u32 *data; | |
344 | }; | |
345 | ||
346 | int fw_core_add_descriptor(struct fw_descriptor *desc); | |
347 | void fw_core_remove_descriptor(struct fw_descriptor *desc); | |
348 | ||
349 | /* | |
350 | * The iso packet format allows for an immediate header/payload part | |
351 | * stored in 'header' immediately after the packet info plus an | |
352 | * indirect payload part that is pointer to by the 'payload' field. | |
353 | * Applications can use one or the other or both to implement simple | |
354 | * low-bandwidth streaming (e.g. audio) or more advanced | |
355 | * scatter-gather streaming (e.g. assembling video frame automatically). | |
356 | */ | |
357 | struct fw_iso_packet { | |
358 | u16 payload_length; /* Length of indirect payload. */ | |
359 | u32 interrupt:1; /* Generate interrupt on this packet */ | |
360 | u32 skip:1; /* Set to not send packet at all. */ | |
361 | u32 tag:2; | |
362 | u32 sy:4; | |
363 | u32 header_length:8; /* Length of immediate header. */ | |
364 | u32 header[0]; | |
365 | }; | |
366 | ||
367 | #define FW_ISO_CONTEXT_TRANSMIT 0 | |
368 | #define FW_ISO_CONTEXT_RECEIVE 1 | |
369 | ||
370 | #define FW_ISO_CONTEXT_MATCH_TAG0 1 | |
371 | #define FW_ISO_CONTEXT_MATCH_TAG1 2 | |
372 | #define FW_ISO_CONTEXT_MATCH_TAG2 4 | |
373 | #define FW_ISO_CONTEXT_MATCH_TAG3 8 | |
374 | #define FW_ISO_CONTEXT_MATCH_ALL_TAGS 15 | |
375 | ||
376 | /* | |
377 | * An iso buffer is just a set of pages mapped for DMA in the | |
378 | * specified direction. Since the pages are to be used for DMA, they | |
379 | * are not mapped into the kernel virtual address space. We store the | |
380 | * DMA address in the page private. The helper function | |
381 | * fw_iso_buffer_map() will map the pages into a given vma. | |
382 | */ | |
383 | struct fw_iso_buffer { | |
384 | enum dma_data_direction direction; | |
385 | struct page **pages; | |
386 | int page_count; | |
387 | }; | |
388 | ||
389 | int fw_iso_buffer_init(struct fw_iso_buffer *buffer, struct fw_card *card, | |
390 | int page_count, enum dma_data_direction direction); | |
391 | void fw_iso_buffer_destroy(struct fw_iso_buffer *buffer, struct fw_card *card); | |
392 | ||
393 | struct fw_iso_context; | |
394 | typedef void (*fw_iso_callback_t)(struct fw_iso_context *context, | |
395 | u32 cycle, size_t header_length, | |
396 | void *header, void *data); | |
397 | struct fw_iso_context { | |
398 | struct fw_card *card; | |
399 | int type; | |
400 | int channel; | |
401 | int speed; | |
402 | size_t header_size; | |
403 | fw_iso_callback_t callback; | |
404 | void *callback_data; | |
405 | }; | |
406 | ||
407 | struct fw_iso_context *fw_iso_context_create(struct fw_card *card, | |
408 | int type, int channel, int speed, size_t header_size, | |
409 | fw_iso_callback_t callback, void *callback_data); | |
410 | int fw_iso_context_queue(struct fw_iso_context *ctx, | |
411 | struct fw_iso_packet *packet, | |
412 | struct fw_iso_buffer *buffer, | |
413 | unsigned long payload); | |
414 | int fw_iso_context_start(struct fw_iso_context *ctx, | |
415 | int cycle, int sync, int tags); | |
416 | int fw_iso_context_stop(struct fw_iso_context *ctx); | |
417 | void fw_iso_context_destroy(struct fw_iso_context *ctx); | |
418 | ||
77c9a5da | 419 | #endif /* _LINUX_FIREWIRE_H */ |