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_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
51 #define CSR_OFFSET 0x40
53 #define CSR_DIRECTORY 0xc0
55 #define CSR_DESCRIPTOR 0x01
56 #define CSR_VENDOR 0x03
57 #define CSR_HARDWARE_VERSION 0x04
58 #define CSR_NODE_CAPABILITIES 0x0c
60 #define CSR_SPECIFIER_ID 0x12
61 #define CSR_VERSION 0x13
62 #define CSR_DEPENDENT_INFO 0x14
63 #define CSR_MODEL 0x17
64 #define CSR_INSTANCE 0x18
65 #define CSR_DIRECTORY_ID 0x20
67 struct fw_csr_iterator {
72 void fw_csr_iterator_init(struct fw_csr_iterator *ci, u32 *p);
73 int fw_csr_iterator_next(struct fw_csr_iterator *ci, int *key, int *value);
75 int fw_csr_string(u32 *directory, int key, char *buf, size_t size);
77 extern struct bus_type fw_bus_type;
79 struct fw_card_driver;
83 const struct fw_card_driver *driver;
84 struct device *device;
86 struct completion done;
92 struct list_head transaction_list;
93 struct timer_list flush_timer;
94 unsigned long reset_jiffies;
96 unsigned long long guid;
99 int config_rom_generation;
101 spinlock_t lock; /* Take this lock when handling the lists in
103 struct fw_node *local_node;
104 struct fw_node *root_node;
105 struct fw_node *irm_node;
106 u8 color; /* must be u8 to match the definition in struct fw_node */
108 bool beta_repeaters_present;
112 struct list_head link;
114 /* Work struct for BM duties. */
115 struct delayed_work work;
118 __be32 bm_transaction_data[2];
120 bool broadcast_channel_allocated;
121 u32 broadcast_channel;
122 __be32 topology_map[(CSR_TOPOLOGY_MAP_END - CSR_TOPOLOGY_MAP) / 4];
125 struct fw_attribute_group {
126 struct attribute_group *groups[2];
127 struct attribute_group group;
128 struct attribute *attrs[12];
131 enum fw_device_state {
132 FW_DEVICE_INITIALIZING,
139 * Note, fw_device.generation always has to be read before fw_device.node_id.
140 * Use SMP memory barriers to ensure this. Otherwise requests will be sent
141 * to an outdated node_id if the generation was updated in the meantime due
144 * Likewise, fw-core will take care to update .node_id before .generation so
145 * that whenever fw_device.generation is current WRT the actual bus generation,
146 * fw_device.node_id is guaranteed to be current too.
148 * The same applies to fw_device.card->node_id vs. fw_device.generation.
150 * fw_device.config_rom and fw_device.config_rom_length may be accessed during
151 * the lifetime of any fw_unit belonging to the fw_device, before device_del()
152 * was called on the last fw_unit. Alternatively, they may be accessed while
153 * holding fw_device_rwsem.
157 struct fw_node *node;
161 struct fw_card *card;
162 struct device device;
164 struct mutex client_list_mutex;
165 struct list_head client_list;
168 size_t config_rom_length;
169 int config_rom_retries;
174 unsigned bc_implemented:2;
176 struct delayed_work work;
177 struct fw_attribute_group attribute_group;
180 static inline struct fw_device *fw_device(struct device *dev)
182 return container_of(dev, struct fw_device, device);
185 static inline int fw_device_is_shutdown(struct fw_device *device)
187 return atomic_read(&device->state) == FW_DEVICE_SHUTDOWN;
190 static inline struct fw_device *fw_device_get(struct fw_device *device)
192 get_device(&device->device);
197 static inline void fw_device_put(struct fw_device *device)
199 put_device(&device->device);
202 int fw_device_enable_phys_dma(struct fw_device *device);
205 * fw_unit.directory must not be accessed after device_del(&fw_unit.device).
208 struct device device;
210 struct fw_attribute_group attribute_group;
213 static inline struct fw_unit *fw_unit(struct device *dev)
215 return container_of(dev, struct fw_unit, device);
218 static inline struct fw_unit *fw_unit_get(struct fw_unit *unit)
220 get_device(&unit->device);
225 static inline void fw_unit_put(struct fw_unit *unit)
227 put_device(&unit->device);
230 static inline struct fw_device *fw_parent_device(struct fw_unit *unit)
232 return fw_device(unit->device.parent);
235 struct ieee1394_device_id;
238 struct device_driver driver;
239 /* Called when the parent device sits through a bus reset. */
240 void (*update)(struct fw_unit *unit);
241 const struct ieee1394_device_id *id_table;
247 typedef void (*fw_packet_callback_t)(struct fw_packet *packet,
248 struct fw_card *card, int status);
249 typedef void (*fw_transaction_callback_t)(struct fw_card *card, int rcode,
250 void *data, size_t length,
251 void *callback_data);
253 * Important note: Except for the FCP registers, the callback must guarantee
254 * that either fw_send_response() or kfree() is called on the @request.
256 typedef void (*fw_address_callback_t)(struct fw_card *card,
257 struct fw_request *request,
258 int tcode, int destination, int source,
259 int generation, int speed,
260 unsigned long long offset,
261 void *data, size_t length,
262 void *callback_data);
268 size_t header_length;
270 size_t payload_length;
271 dma_addr_t payload_bus;
276 * This callback is called when the packet transmission has
277 * completed; for successful transmission, the status code is
278 * the ack received from the destination, otherwise it's a
279 * negative errno: ENOMEM, ESTALE, ETIMEDOUT, ENODEV, EIO.
280 * The callback can be called from tasklet context and thus
283 fw_packet_callback_t callback;
285 struct list_head link;
289 struct fw_transaction {
290 int node_id; /* The generation is implied; it is always the current. */
293 struct list_head link;
295 struct fw_packet packet;
298 * The data passed to the callback is valid only during the
301 fw_transaction_callback_t callback;
305 struct fw_address_handler {
308 fw_address_callback_t address_callback;
310 struct list_head link;
313 struct fw_address_region {
318 extern const struct fw_address_region fw_high_memory_region;
320 int fw_core_add_address_handler(struct fw_address_handler *handler,
321 const struct fw_address_region *region);
322 void fw_core_remove_address_handler(struct fw_address_handler *handler);
323 void fw_send_response(struct fw_card *card,
324 struct fw_request *request, int rcode);
325 void fw_send_request(struct fw_card *card, struct fw_transaction *t,
326 int tcode, int destination_id, int generation, int speed,
327 unsigned long long offset, void *payload, size_t length,
328 fw_transaction_callback_t callback, void *callback_data);
329 int fw_cancel_transaction(struct fw_card *card,
330 struct fw_transaction *transaction);
331 int fw_run_transaction(struct fw_card *card, int tcode, int destination_id,
332 int generation, int speed, unsigned long long offset,
333 void *payload, size_t length);
335 static inline int fw_stream_packet_destination_id(int tag, int channel, int sy)
337 return tag << 14 | channel << 8 | sy;
340 struct fw_descriptor {
341 struct list_head link;
348 int fw_core_add_descriptor(struct fw_descriptor *desc);
349 void fw_core_remove_descriptor(struct fw_descriptor *desc);
352 * The iso packet format allows for an immediate header/payload part
353 * stored in 'header' immediately after the packet info plus an
354 * indirect payload part that is pointer to by the 'payload' field.
355 * Applications can use one or the other or both to implement simple
356 * low-bandwidth streaming (e.g. audio) or more advanced
357 * scatter-gather streaming (e.g. assembling video frame automatically).
359 struct fw_iso_packet {
360 u16 payload_length; /* Length of indirect payload. */
361 u32 interrupt:1; /* Generate interrupt on this packet */
362 u32 skip:1; /* Set to not send packet at all. */
365 u32 header_length:8; /* Length of immediate header. */
369 #define FW_ISO_CONTEXT_TRANSMIT 0
370 #define FW_ISO_CONTEXT_RECEIVE 1
372 #define FW_ISO_CONTEXT_MATCH_TAG0 1
373 #define FW_ISO_CONTEXT_MATCH_TAG1 2
374 #define FW_ISO_CONTEXT_MATCH_TAG2 4
375 #define FW_ISO_CONTEXT_MATCH_TAG3 8
376 #define FW_ISO_CONTEXT_MATCH_ALL_TAGS 15
379 * An iso buffer is just a set of pages mapped for DMA in the
380 * specified direction. Since the pages are to be used for DMA, they
381 * are not mapped into the kernel virtual address space. We store the
382 * DMA address in the page private. The helper function
383 * fw_iso_buffer_map() will map the pages into a given vma.
385 struct fw_iso_buffer {
386 enum dma_data_direction direction;
391 int fw_iso_buffer_init(struct fw_iso_buffer *buffer, struct fw_card *card,
392 int page_count, enum dma_data_direction direction);
393 void fw_iso_buffer_destroy(struct fw_iso_buffer *buffer, struct fw_card *card);
395 struct fw_iso_context;
396 typedef void (*fw_iso_callback_t)(struct fw_iso_context *context,
397 u32 cycle, size_t header_length,
398 void *header, void *data);
399 struct fw_iso_context {
400 struct fw_card *card;
405 fw_iso_callback_t callback;
409 struct fw_iso_context *fw_iso_context_create(struct fw_card *card,
410 int type, int channel, int speed, size_t header_size,
411 fw_iso_callback_t callback, void *callback_data);
412 int fw_iso_context_queue(struct fw_iso_context *ctx,
413 struct fw_iso_packet *packet,
414 struct fw_iso_buffer *buffer,
415 unsigned long payload);
416 int fw_iso_context_start(struct fw_iso_context *ctx,
417 int cycle, int sync, int tags);
418 int fw_iso_context_stop(struct fw_iso_context *ctx);
419 void fw_iso_context_destroy(struct fw_iso_context *ctx);
421 #endif /* _LINUX_FIREWIRE_H */