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;
114 struct list_head link;
116 struct list_head phy_receiver_list;
118 struct delayed_work br_work; /* bus reset job */
121 struct delayed_work bm_work; /* bus manager job */
124 __be32 bm_transaction_data[2];
128 bool priority_budget_implemented; /* controller feature */
129 bool broadcast_channel_auto_allocated; /* controller feature */
131 bool broadcast_channel_allocated;
132 u32 broadcast_channel;
133 __be32 topology_map[(CSR_TOPOLOGY_MAP_END - CSR_TOPOLOGY_MAP) / 4];
135 __be32 maint_utility_register;
138 struct fw_attribute_group {
139 struct attribute_group *groups[2];
140 struct attribute_group group;
141 struct attribute *attrs[12];
144 enum fw_device_state {
145 FW_DEVICE_INITIALIZING,
152 * Note, fw_device.generation always has to be read before fw_device.node_id.
153 * Use SMP memory barriers to ensure this. Otherwise requests will be sent
154 * to an outdated node_id if the generation was updated in the meantime due
157 * Likewise, fw-core will take care to update .node_id before .generation so
158 * that whenever fw_device.generation is current WRT the actual bus generation,
159 * fw_device.node_id is guaranteed to be current too.
161 * The same applies to fw_device.card->node_id vs. fw_device.generation.
163 * fw_device.config_rom and fw_device.config_rom_length may be accessed during
164 * the lifetime of any fw_unit belonging to the fw_device, before device_del()
165 * was called on the last fw_unit. Alternatively, they may be accessed while
166 * holding fw_device_rwsem.
170 struct fw_node *node;
174 struct fw_card *card;
175 struct device device;
177 struct mutex client_list_mutex;
178 struct list_head client_list;
180 const u32 *config_rom;
181 size_t config_rom_length;
182 int config_rom_retries;
187 unsigned bc_implemented:2;
189 struct delayed_work work;
190 struct fw_attribute_group attribute_group;
193 static inline struct fw_device *fw_device(struct device *dev)
195 return container_of(dev, struct fw_device, device);
198 static inline int fw_device_is_shutdown(struct fw_device *device)
200 return atomic_read(&device->state) == FW_DEVICE_SHUTDOWN;
203 static inline struct fw_device *fw_device_get(struct fw_device *device)
205 get_device(&device->device);
210 static inline void fw_device_put(struct fw_device *device)
212 put_device(&device->device);
215 int fw_device_enable_phys_dma(struct fw_device *device);
218 * fw_unit.directory must not be accessed after device_del(&fw_unit.device).
221 struct device device;
222 const u32 *directory;
223 struct fw_attribute_group attribute_group;
226 static inline struct fw_unit *fw_unit(struct device *dev)
228 return container_of(dev, struct fw_unit, device);
231 static inline struct fw_unit *fw_unit_get(struct fw_unit *unit)
233 get_device(&unit->device);
238 static inline void fw_unit_put(struct fw_unit *unit)
240 put_device(&unit->device);
243 static inline struct fw_device *fw_parent_device(struct fw_unit *unit)
245 return fw_device(unit->device.parent);
248 struct ieee1394_device_id;
251 struct device_driver driver;
252 /* Called when the parent device sits through a bus reset. */
253 void (*update)(struct fw_unit *unit);
254 const struct ieee1394_device_id *id_table;
260 typedef void (*fw_packet_callback_t)(struct fw_packet *packet,
261 struct fw_card *card, int status);
262 typedef void (*fw_transaction_callback_t)(struct fw_card *card, int rcode,
263 void *data, size_t length,
264 void *callback_data);
266 * Important note: Except for the FCP registers, the callback must guarantee
267 * that either fw_send_response() or kfree() is called on the @request.
269 typedef void (*fw_address_callback_t)(struct fw_card *card,
270 struct fw_request *request,
271 int tcode, int destination, int source,
273 unsigned long long offset,
274 void *data, size_t length,
275 void *callback_data);
281 size_t header_length;
283 size_t payload_length;
284 dma_addr_t payload_bus;
289 * This callback is called when the packet transmission has completed.
290 * For successful transmission, the status code is the ack received
291 * from the destination. Otherwise it is one of the juju-specific
292 * rcodes: RCODE_SEND_ERROR, _CANCELLED, _BUSY, _GENERATION, _NO_ACK.
293 * The callback can be called from tasklet context and thus
296 fw_packet_callback_t callback;
298 struct list_head link;
302 struct fw_transaction {
303 int node_id; /* The generation is implied; it is always the current. */
306 struct list_head link;
307 struct fw_card *card;
308 struct timer_list split_timeout_timer;
310 struct fw_packet packet;
313 * The data passed to the callback is valid only during the
316 fw_transaction_callback_t callback;
320 struct fw_address_handler {
323 fw_address_callback_t address_callback;
325 struct list_head link;
328 struct fw_address_region {
333 extern const struct fw_address_region fw_high_memory_region;
335 int fw_core_add_address_handler(struct fw_address_handler *handler,
336 const struct fw_address_region *region);
337 void fw_core_remove_address_handler(struct fw_address_handler *handler);
338 void fw_send_response(struct fw_card *card,
339 struct fw_request *request, int rcode);
340 void fw_send_request(struct fw_card *card, struct fw_transaction *t,
341 int tcode, int destination_id, int generation, int speed,
342 unsigned long long offset, void *payload, size_t length,
343 fw_transaction_callback_t callback, void *callback_data);
344 int fw_cancel_transaction(struct fw_card *card,
345 struct fw_transaction *transaction);
346 int fw_run_transaction(struct fw_card *card, int tcode, int destination_id,
347 int generation, int speed, unsigned long long offset,
348 void *payload, size_t length);
350 static inline int fw_stream_packet_destination_id(int tag, int channel, int sy)
352 return tag << 14 | channel << 8 | sy;
355 struct fw_descriptor {
356 struct list_head link;
363 int fw_core_add_descriptor(struct fw_descriptor *desc);
364 void fw_core_remove_descriptor(struct fw_descriptor *desc);
367 * The iso packet format allows for an immediate header/payload part
368 * stored in 'header' immediately after the packet info plus an
369 * indirect payload part that is pointer to by the 'payload' field.
370 * Applications can use one or the other or both to implement simple
371 * low-bandwidth streaming (e.g. audio) or more advanced
372 * scatter-gather streaming (e.g. assembling video frame automatically).
374 struct fw_iso_packet {
375 u16 payload_length; /* Length of indirect payload */
376 u32 interrupt:1; /* Generate interrupt on this packet */
377 u32 skip:1; /* tx: Set to not send packet at all */
378 /* rx: Sync bit, wait for matching sy */
379 u32 tag:2; /* tx: Tag in packet header */
380 u32 sy:4; /* tx: Sy in packet header */
381 u32 header_length:8; /* Length of immediate header */
382 u32 header[0]; /* tx: Top of 1394 isoch. data_block */
385 #define FW_ISO_CONTEXT_TRANSMIT 0
386 #define FW_ISO_CONTEXT_RECEIVE 1
387 #define FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL 2
389 #define FW_ISO_CONTEXT_MATCH_TAG0 1
390 #define FW_ISO_CONTEXT_MATCH_TAG1 2
391 #define FW_ISO_CONTEXT_MATCH_TAG2 4
392 #define FW_ISO_CONTEXT_MATCH_TAG3 8
393 #define FW_ISO_CONTEXT_MATCH_ALL_TAGS 15
396 * An iso buffer is just a set of pages mapped for DMA in the
397 * specified direction. Since the pages are to be used for DMA, they
398 * are not mapped into the kernel virtual address space. We store the
399 * DMA address in the page private. The helper function
400 * fw_iso_buffer_map() will map the pages into a given vma.
402 struct fw_iso_buffer {
403 enum dma_data_direction direction;
408 int fw_iso_buffer_init(struct fw_iso_buffer *buffer, struct fw_card *card,
409 int page_count, enum dma_data_direction direction);
410 void fw_iso_buffer_destroy(struct fw_iso_buffer *buffer, struct fw_card *card);
411 size_t fw_iso_buffer_lookup(struct fw_iso_buffer *buffer, dma_addr_t completed);
413 struct fw_iso_context;
414 typedef void (*fw_iso_callback_t)(struct fw_iso_context *context,
415 u32 cycle, size_t header_length,
416 void *header, void *data);
417 typedef void (*fw_iso_mc_callback_t)(struct fw_iso_context *context,
418 dma_addr_t completed, void *data);
419 struct fw_iso_context {
420 struct fw_card *card;
426 fw_iso_callback_t sc;
427 fw_iso_mc_callback_t mc;
432 struct fw_iso_context *fw_iso_context_create(struct fw_card *card,
433 int type, int channel, int speed, size_t header_size,
434 fw_iso_callback_t callback, void *callback_data);
435 int fw_iso_context_set_channels(struct fw_iso_context *ctx, u64 *channels);
436 int fw_iso_context_queue(struct fw_iso_context *ctx,
437 struct fw_iso_packet *packet,
438 struct fw_iso_buffer *buffer,
439 unsigned long payload);
440 int fw_iso_context_start(struct fw_iso_context *ctx,
441 int cycle, int sync, int tags);
442 int fw_iso_context_stop(struct fw_iso_context *ctx);
443 void fw_iso_context_destroy(struct fw_iso_context *ctx);
445 #endif /* _LINUX_FIREWIRE_H */