1 #ifndef _LINUX_FIREWIRE_H
2 #define _LINUX_FIREWIRE_H
4 #include <linux/completion.h>
5 #include <linux/device.h>
6 #include <linux/dma-mapping.h>
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>
17 #include <asm/atomic.h>
18 #include <asm/byteorder.h>
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)
23 #define CSR_REGISTER_BASE 0xfffff0000000ULL
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_PRIORITY_BUDGET 0x218
36 #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
41 #define CSR_MAINT_UTILITY 0x230
42 #define CSR_BROADCAST_CHANNEL 0x234
43 #define CSR_CONFIG_ROM 0x400
44 #define CSR_CONFIG_ROM_END 0x800
45 #define CSR_FCP_COMMAND 0xB00
46 #define CSR_FCP_RESPONSE 0xD00
47 #define CSR_FCP_END 0xF00
48 #define CSR_TOPOLOGY_MAP 0x1000
49 #define CSR_TOPOLOGY_MAP_END 0x1400
50 #define CSR_SPEED_MAP 0x2000
51 #define CSR_SPEED_MAP_END 0x3000
53 #define CSR_OFFSET 0x40
55 #define CSR_DIRECTORY 0xc0
57 #define CSR_DESCRIPTOR 0x01
58 #define CSR_VENDOR 0x03
59 #define CSR_HARDWARE_VERSION 0x04
61 #define CSR_SPECIFIER_ID 0x12
62 #define CSR_VERSION 0x13
63 #define CSR_DEPENDENT_INFO 0x14
64 #define CSR_MODEL 0x17
65 #define CSR_DIRECTORY_ID 0x20
67 struct fw_csr_iterator {
72 void fw_csr_iterator_init(struct fw_csr_iterator *ci, const u32 *p);
73 int fw_csr_iterator_next(struct fw_csr_iterator *ci, int *key, int *value);
74 int fw_csr_string(const u32 *directory, int key, char *buf, size_t size);
76 extern struct bus_type fw_bus_type;
78 struct fw_card_driver;
82 const struct fw_card_driver *driver;
83 struct device *device;
85 struct completion done;
91 struct list_head transaction_list;
92 unsigned long reset_jiffies;
96 unsigned int split_timeout_cycles;
97 unsigned int split_timeout_jiffies;
99 unsigned long long guid;
100 unsigned max_receive;
102 int config_rom_generation;
104 spinlock_t lock; /* Take this lock when handling the lists in
106 struct fw_node *local_node;
107 struct fw_node *root_node;
108 struct fw_node *irm_node;
109 u8 color; /* must be u8 to match the definition in struct fw_node */
111 bool beta_repeaters_present;
115 struct list_head link;
117 struct delayed_work br_work; /* bus reset job */
120 struct delayed_work bm_work; /* bus manager job */
123 __be32 bm_transaction_data[2];
127 bool priority_budget_implemented; /* controller feature */
128 bool broadcast_channel_auto_allocated; /* controller feature */
130 bool broadcast_channel_allocated;
131 u32 broadcast_channel;
132 __be32 topology_map[(CSR_TOPOLOGY_MAP_END - CSR_TOPOLOGY_MAP) / 4];
134 __be32 maint_utility_register;
137 struct fw_attribute_group {
138 struct attribute_group *groups[2];
139 struct attribute_group group;
140 struct attribute *attrs[12];
143 enum fw_device_state {
144 FW_DEVICE_INITIALIZING,
151 * Note, fw_device.generation always has to be read before fw_device.node_id.
152 * Use SMP memory barriers to ensure this. Otherwise requests will be sent
153 * to an outdated node_id if the generation was updated in the meantime due
156 * Likewise, fw-core will take care to update .node_id before .generation so
157 * that whenever fw_device.generation is current WRT the actual bus generation,
158 * fw_device.node_id is guaranteed to be current too.
160 * The same applies to fw_device.card->node_id vs. fw_device.generation.
162 * fw_device.config_rom and fw_device.config_rom_length may be accessed during
163 * the lifetime of any fw_unit belonging to the fw_device, before device_del()
164 * was called on the last fw_unit. Alternatively, they may be accessed while
165 * holding fw_device_rwsem.
169 struct fw_node *node;
173 struct fw_card *card;
174 struct device device;
176 struct mutex client_list_mutex;
177 struct list_head client_list;
179 const u32 *config_rom;
180 size_t config_rom_length;
181 int config_rom_retries;
186 unsigned bc_implemented:2;
188 struct delayed_work work;
189 struct fw_attribute_group attribute_group;
192 static inline struct fw_device *fw_device(struct device *dev)
194 return container_of(dev, struct fw_device, device);
197 static inline int fw_device_is_shutdown(struct fw_device *device)
199 return atomic_read(&device->state) == FW_DEVICE_SHUTDOWN;
202 static inline struct fw_device *fw_device_get(struct fw_device *device)
204 get_device(&device->device);
209 static inline void fw_device_put(struct fw_device *device)
211 put_device(&device->device);
214 int fw_device_enable_phys_dma(struct fw_device *device);
217 * fw_unit.directory must not be accessed after device_del(&fw_unit.device).
220 struct device device;
221 const u32 *directory;
222 struct fw_attribute_group attribute_group;
225 static inline struct fw_unit *fw_unit(struct device *dev)
227 return container_of(dev, struct fw_unit, device);
230 static inline struct fw_unit *fw_unit_get(struct fw_unit *unit)
232 get_device(&unit->device);
237 static inline void fw_unit_put(struct fw_unit *unit)
239 put_device(&unit->device);
242 static inline struct fw_device *fw_parent_device(struct fw_unit *unit)
244 return fw_device(unit->device.parent);
247 struct ieee1394_device_id;
250 struct device_driver driver;
251 /* Called when the parent device sits through a bus reset. */
252 void (*update)(struct fw_unit *unit);
253 const struct ieee1394_device_id *id_table;
259 typedef void (*fw_packet_callback_t)(struct fw_packet *packet,
260 struct fw_card *card, int status);
261 typedef void (*fw_transaction_callback_t)(struct fw_card *card, int rcode,
262 void *data, size_t length,
263 void *callback_data);
265 * Important note: Except for the FCP registers, the callback must guarantee
266 * that either fw_send_response() or kfree() is called on the @request.
268 typedef void (*fw_address_callback_t)(struct fw_card *card,
269 struct fw_request *request,
270 int tcode, int destination, int source,
272 unsigned long long offset,
273 void *data, size_t length,
274 void *callback_data);
280 size_t header_length;
282 size_t payload_length;
283 dma_addr_t payload_bus;
288 * This callback is called when the packet transmission has completed.
289 * For successful transmission, the status code is the ack received
290 * from the destination. Otherwise it is one of the juju-specific
291 * rcodes: RCODE_SEND_ERROR, _CANCELLED, _BUSY, _GENERATION, _NO_ACK.
292 * The callback can be called from tasklet context and thus
295 fw_packet_callback_t callback;
297 struct list_head link;
301 struct fw_transaction {
302 int node_id; /* The generation is implied; it is always the current. */
305 struct list_head link;
306 struct fw_card *card;
307 struct timer_list split_timeout_timer;
309 struct fw_packet packet;
312 * The data passed to the callback is valid only during the
315 fw_transaction_callback_t callback;
319 struct fw_address_handler {
322 fw_address_callback_t address_callback;
324 struct list_head link;
327 struct fw_address_region {
332 extern const struct fw_address_region fw_high_memory_region;
334 int fw_core_add_address_handler(struct fw_address_handler *handler,
335 const struct fw_address_region *region);
336 void fw_core_remove_address_handler(struct fw_address_handler *handler);
337 void fw_send_response(struct fw_card *card,
338 struct fw_request *request, int rcode);
339 void fw_send_request(struct fw_card *card, struct fw_transaction *t,
340 int tcode, int destination_id, int generation, int speed,
341 unsigned long long offset, void *payload, size_t length,
342 fw_transaction_callback_t callback, void *callback_data);
343 int fw_cancel_transaction(struct fw_card *card,
344 struct fw_transaction *transaction);
345 int fw_run_transaction(struct fw_card *card, int tcode, int destination_id,
346 int generation, int speed, unsigned long long offset,
347 void *payload, size_t length);
349 static inline int fw_stream_packet_destination_id(int tag, int channel, int sy)
351 return tag << 14 | channel << 8 | sy;
354 struct fw_descriptor {
355 struct list_head link;
362 int fw_core_add_descriptor(struct fw_descriptor *desc);
363 void fw_core_remove_descriptor(struct fw_descriptor *desc);
366 * The iso packet format allows for an immediate header/payload part
367 * stored in 'header' immediately after the packet info plus an
368 * indirect payload part that is pointer to by the 'payload' field.
369 * Applications can use one or the other or both to implement simple
370 * low-bandwidth streaming (e.g. audio) or more advanced
371 * scatter-gather streaming (e.g. assembling video frame automatically).
373 struct fw_iso_packet {
374 u16 payload_length; /* Length of indirect payload. */
375 u32 interrupt:1; /* Generate interrupt on this packet */
376 u32 skip:1; /* Set to not send packet at all. */
379 u32 header_length:8; /* Length of immediate header. */
383 #define FW_ISO_CONTEXT_TRANSMIT 0
384 #define FW_ISO_CONTEXT_RECEIVE 1
386 #define FW_ISO_CONTEXT_MATCH_TAG0 1
387 #define FW_ISO_CONTEXT_MATCH_TAG1 2
388 #define FW_ISO_CONTEXT_MATCH_TAG2 4
389 #define FW_ISO_CONTEXT_MATCH_TAG3 8
390 #define FW_ISO_CONTEXT_MATCH_ALL_TAGS 15
393 * An iso buffer is just a set of pages mapped for DMA in the
394 * specified direction. Since the pages are to be used for DMA, they
395 * are not mapped into the kernel virtual address space. We store the
396 * DMA address in the page private. The helper function
397 * fw_iso_buffer_map() will map the pages into a given vma.
399 struct fw_iso_buffer {
400 enum dma_data_direction direction;
405 int fw_iso_buffer_init(struct fw_iso_buffer *buffer, struct fw_card *card,
406 int page_count, enum dma_data_direction direction);
407 void fw_iso_buffer_destroy(struct fw_iso_buffer *buffer, struct fw_card *card);
409 struct fw_iso_context;
410 typedef void (*fw_iso_callback_t)(struct fw_iso_context *context,
411 u32 cycle, size_t header_length,
412 void *header, void *data);
413 struct fw_iso_context {
414 struct fw_card *card;
419 fw_iso_callback_t callback;
423 struct fw_iso_context *fw_iso_context_create(struct fw_card *card,
424 int type, int channel, int speed, size_t header_size,
425 fw_iso_callback_t callback, void *callback_data);
426 int fw_iso_context_queue(struct fw_iso_context *ctx,
427 struct fw_iso_packet *packet,
428 struct fw_iso_buffer *buffer,
429 unsigned long payload);
430 int fw_iso_context_start(struct fw_iso_context *ctx,
431 int cycle, int sync, int tags);
432 int fw_iso_context_stop(struct fw_iso_context *ctx);
433 void fw_iso_context_destroy(struct fw_iso_context *ctx);
435 #endif /* _LINUX_FIREWIRE_H */