[deliverable/linux.git] / include / linux / firewire.h

#ifndef _LINUX_FIREWIRE_H
#define _LINUX_FIREWIRE_H

#include <linux/completion.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/kernel.h>
#include <linux/kref.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/spinlock.h>
#include <linux/sysfs.h>
#include <linux/timer.h>
#include <linux/types.h>
#include <linux/workqueue.h>

#include <asm/atomic.h>
#include <asm/byteorder.h>

#define fw_notify(s, args...) printk(KERN_NOTICE KBUILD_MODNAME ": " s, ## args)
#define fw_error(s, args...) printk(KERN_ERR KBUILD_MODNAME ": " s, ## args)

#define CSR_REGISTER_BASE		0xfffff0000000ULL

/* register offsets are relative to CSR_REGISTER_BASE */
#define CSR_STATE_CLEAR			0x0
#define CSR_STATE_SET			0x4
#define CSR_NODE_IDS			0x8
#define CSR_RESET_START			0xc
#define CSR_SPLIT_TIMEOUT_HI		0x18
#define CSR_SPLIT_TIMEOUT_LO		0x1c
#define CSR_CYCLE_TIME			0x200
#define CSR_BUS_TIME			0x204
#define CSR_BUSY_TIMEOUT		0x210
#define CSR_PRIORITY_BUDGET		0x218
#define CSR_BUS_MANAGER_ID		0x21c
#define CSR_BANDWIDTH_AVAILABLE		0x220
#define CSR_CHANNELS_AVAILABLE		0x224
#define CSR_CHANNELS_AVAILABLE_HI	0x224
#define CSR_CHANNELS_AVAILABLE_LO	0x228
#define CSR_MAINT_UTILITY		0x230
#define CSR_BROADCAST_CHANNEL		0x234
#define CSR_CONFIG_ROM			0x400
#define CSR_CONFIG_ROM_END		0x800
#define CSR_FCP_COMMAND			0xB00
#define CSR_FCP_RESPONSE		0xD00
#define CSR_FCP_END			0xF00
#define CSR_TOPOLOGY_MAP		0x1000
#define CSR_TOPOLOGY_MAP_END		0x1400
#define CSR_SPEED_MAP			0x2000
#define CSR_SPEED_MAP_END		0x3000

#define CSR_OFFSET		0x40
#define CSR_LEAF		0x80
#define CSR_DIRECTORY		0xc0

#define CSR_DESCRIPTOR		0x01
#define CSR_VENDOR		0x03
#define CSR_HARDWARE_VERSION	0x04
#define CSR_UNIT		0x11
#define CSR_SPECIFIER_ID	0x12
#define CSR_VERSION		0x13
#define CSR_DEPENDENT_INFO	0x14
#define CSR_MODEL		0x17
#define CSR_DIRECTORY_ID	0x20

struct fw_csr_iterator {
	const u32 *p;
	const u32 *end;
};

void fw_csr_iterator_init(struct fw_csr_iterator *ci, const u32 *p);
int fw_csr_iterator_next(struct fw_csr_iterator *ci, int *key, int *value);
int fw_csr_string(const u32 *directory, int key, char *buf, size_t size);

extern struct bus_type fw_bus_type;

struct fw_card_driver;
struct fw_node;

struct fw_card {
	const struct fw_card_driver *driver;
	struct device *device;
	struct kref kref;
	struct completion done;

	int node_id;
	int generation;
	int current_tlabel;
	u64 tlabel_mask;
	struct list_head transaction_list;
	unsigned long reset_jiffies;

	u32 split_timeout_hi;
	u32 split_timeout_lo;
	unsigned int split_timeout_cycles;
	unsigned int split_timeout_jiffies;

	unsigned long long guid;
	unsigned max_receive;
	int link_speed;
	int config_rom_generation;

	spinlock_t lock; /* Take this lock when handling the lists in
			  * this struct. */
	struct fw_node *local_node;
	struct fw_node *root_node;
	struct fw_node *irm_node;
	u8 color; /* must be u8 to match the definition in struct fw_node */
	int gap_count;
	bool beta_repeaters_present;

	int index;

	struct list_head link;

	struct delayed_work br_work; /* bus reset job */
	bool br_short;

	struct delayed_work bm_work; /* bus manager job */
	int bm_retries;
	int bm_generation;
	__be32 bm_transaction_data[2];
	int bm_node_id;
	bool bm_abdicate;

	bool priority_budget_implemented;	/* controller feature */
	bool broadcast_channel_auto_allocated;	/* controller feature */

	bool broadcast_channel_allocated;
	u32 broadcast_channel;
	__be32 topology_map[(CSR_TOPOLOGY_MAP_END - CSR_TOPOLOGY_MAP) / 4];

	__be32 maint_utility_register;
};

struct fw_attribute_group {
	struct attribute_group *groups[2];
	struct attribute_group group;
	struct attribute *attrs[12];
};

enum fw_device_state {
	FW_DEVICE_INITIALIZING,
	FW_DEVICE_RUNNING,
	FW_DEVICE_GONE,
	FW_DEVICE_SHUTDOWN,
};

/*
 * Note, fw_device.generation always has to be read before fw_device.node_id.
 * Use SMP memory barriers to ensure this.  Otherwise requests will be sent
 * to an outdated node_id if the generation was updated in the meantime due
 * to a bus reset.
 *
 * Likewise, fw-core will take care to update .node_id before .generation so
 * that whenever fw_device.generation is current WRT the actual bus generation,
 * fw_device.node_id is guaranteed to be current too.
 *
 * The same applies to fw_device.card->node_id vs. fw_device.generation.
 *
 * fw_device.config_rom and fw_device.config_rom_length may be accessed during
 * the lifetime of any fw_unit belonging to the fw_device, before device_del()
 * was called on the last fw_unit.  Alternatively, they may be accessed while
 * holding fw_device_rwsem.
 */
struct fw_device {
	atomic_t state;
	struct fw_node *node;
	int node_id;
	int generation;
	unsigned max_speed;
	struct fw_card *card;
	struct device device;

	struct mutex client_list_mutex;
	struct list_head client_list;

	const u32 *config_rom;
	size_t config_rom_length;
	int config_rom_retries;
	unsigned is_local:1;
	unsigned max_rec:4;
	unsigned cmc:1;
	unsigned irmc:1;
	unsigned bc_implemented:2;

	struct delayed_work work;
	struct fw_attribute_group attribute_group;
};

static inline struct fw_device *fw_device(struct device *dev)
{
	return container_of(dev, struct fw_device, device);
}

static inline int fw_device_is_shutdown(struct fw_device *device)
{
	return atomic_read(&device->state) == FW_DEVICE_SHUTDOWN;
}

static inline struct fw_device *fw_device_get(struct fw_device *device)
{
	get_device(&device->device);

	return device;
}

static inline void fw_device_put(struct fw_device *device)
{
	put_device(&device->device);
}

int fw_device_enable_phys_dma(struct fw_device *device);

/*
 * fw_unit.directory must not be accessed after device_del(&fw_unit.device).
 */
struct fw_unit {
	struct device device;
	const u32 *directory;
	struct fw_attribute_group attribute_group;
};

static inline struct fw_unit *fw_unit(struct device *dev)
{
	return container_of(dev, struct fw_unit, device);
}

static inline struct fw_unit *fw_unit_get(struct fw_unit *unit)
{
	get_device(&unit->device);

	return unit;
}

static inline void fw_unit_put(struct fw_unit *unit)
{
	put_device(&unit->device);
}

static inline struct fw_device *fw_parent_device(struct fw_unit *unit)
{
	return fw_device(unit->device.parent);
}

struct ieee1394_device_id;

struct fw_driver {
	struct device_driver driver;
	/* Called when the parent device sits through a bus reset. */
	void (*update)(struct fw_unit *unit);
	const struct ieee1394_device_id *id_table;
};

struct fw_packet;
struct fw_request;

typedef void (*fw_packet_callback_t)(struct fw_packet *packet,
				     struct fw_card *card, int status);
typedef void (*fw_transaction_callback_t)(struct fw_card *card, int rcode,
					  void *data, size_t length,
					  void *callback_data);
/*
 * Important note:  Except for the FCP registers, the callback must guarantee
 * that either fw_send_response() or kfree() is called on the @request.
 */
typedef void (*fw_address_callback_t)(struct fw_card *card,
				      struct fw_request *request,
				      int tcode, int destination, int source,
				      int generation,
				      unsigned long long offset,
				      void *data, size_t length,
				      void *callback_data);

struct fw_packet {
	int speed;
	int generation;
	u32 header[4];
	size_t header_length;
	void *payload;
	size_t payload_length;
	dma_addr_t payload_bus;
	bool payload_mapped;
	u32 timestamp;

	/*
	 * This callback is called when the packet transmission has
	 * completed; for successful transmission, the status code is
	 * the ack received from the destination, otherwise it's a
	 * negative errno: ENOMEM, ESTALE, ETIMEDOUT, ENODEV, EIO.
	 * The callback can be called from tasklet context and thus
	 * must never block.
	 */
	fw_packet_callback_t callback;
	int ack;
	struct list_head link;
	void *driver_data;
};

struct fw_transaction {
	int node_id; /* The generation is implied; it is always the current. */
	int tlabel;
	int timestamp;
	struct list_head link;
	struct fw_card *card;
	struct timer_list split_timeout_timer;

	struct fw_packet packet;

	/*
	 * The data passed to the callback is valid only during the
	 * callback.
	 */
	fw_transaction_callback_t callback;
	void *callback_data;
};

struct fw_address_handler {
	u64 offset;
	size_t length;
	fw_address_callback_t address_callback;
	void *callback_data;
	struct list_head link;
};

struct fw_address_region {
	u64 start;
	u64 end;
};

extern const struct fw_address_region fw_high_memory_region;

int fw_core_add_address_handler(struct fw_address_handler *handler,
				const struct fw_address_region *region);
void fw_core_remove_address_handler(struct fw_address_handler *handler);
void fw_send_response(struct fw_card *card,
		      struct fw_request *request, int rcode);
void fw_send_request(struct fw_card *card, struct fw_transaction *t,
		     int tcode, int destination_id, int generation, int speed,
		     unsigned long long offset, void *payload, size_t length,
		     fw_transaction_callback_t callback, void *callback_data);
int fw_cancel_transaction(struct fw_card *card,
			  struct fw_transaction *transaction);
int fw_run_transaction(struct fw_card *card, int tcode, int destination_id,
		       int generation, int speed, unsigned long long offset,
		       void *payload, size_t length);

static inline int fw_stream_packet_destination_id(int tag, int channel, int sy)
{
	return tag << 14 | channel << 8 | sy;
}

struct fw_descriptor {
	struct list_head link;
	size_t length;
	u32 immediate;
	u32 key;
	const u32 *data;
};

int fw_core_add_descriptor(struct fw_descriptor *desc);
void fw_core_remove_descriptor(struct fw_descriptor *desc);

/*
 * The iso packet format allows for an immediate header/payload part
 * stored in 'header' immediately after the packet info plus an
 * indirect payload part that is pointer to by the 'payload' field.
 * Applications can use one or the other or both to implement simple
 * low-bandwidth streaming (e.g. audio) or more advanced
 * scatter-gather streaming (e.g. assembling video frame automatically).
 */
struct fw_iso_packet {
	u16 payload_length;	/* Length of indirect payload. */
	u32 interrupt:1;	/* Generate interrupt on this packet */
	u32 skip:1;		/* Set to not send packet at all. */
	u32 tag:2;
	u32 sy:4;
	u32 header_length:8;	/* Length of immediate header. */
	u32 header[0];
};

#define FW_ISO_CONTEXT_TRANSMIT	0
#define FW_ISO_CONTEXT_RECEIVE	1

#define FW_ISO_CONTEXT_MATCH_TAG0	 1
#define FW_ISO_CONTEXT_MATCH_TAG1	 2
#define FW_ISO_CONTEXT_MATCH_TAG2	 4
#define FW_ISO_CONTEXT_MATCH_TAG3	 8
#define FW_ISO_CONTEXT_MATCH_ALL_TAGS	15

/*
 * An iso buffer is just a set of pages mapped for DMA in the
 * specified direction.  Since the pages are to be used for DMA, they
 * are not mapped into the kernel virtual address space.  We store the
 * DMA address in the page private. The helper function
 * fw_iso_buffer_map() will map the pages into a given vma.
 */
struct fw_iso_buffer {
	enum dma_data_direction direction;
	struct page **pages;
	int page_count;
};

int fw_iso_buffer_init(struct fw_iso_buffer *buffer, struct fw_card *card,
		       int page_count, enum dma_data_direction direction);
void fw_iso_buffer_destroy(struct fw_iso_buffer *buffer, struct fw_card *card);

struct fw_iso_context;
typedef void (*fw_iso_callback_t)(struct fw_iso_context *context,
				  u32 cycle, size_t header_length,
				  void *header, void *data);
struct fw_iso_context {
	struct fw_card *card;
	int type;
	int channel;
	int speed;
	size_t header_size;
	fw_iso_callback_t callback;
	void *callback_data;
};

struct fw_iso_context *fw_iso_context_create(struct fw_card *card,
		int type, int channel, int speed, size_t header_size,
		fw_iso_callback_t callback, void *callback_data);
int fw_iso_context_queue(struct fw_iso_context *ctx,
			 struct fw_iso_packet *packet,
			 struct fw_iso_buffer *buffer,
			 unsigned long payload);
int fw_iso_context_start(struct fw_iso_context *ctx,
			 int cycle, int sync, int tags);
int fw_iso_context_stop(struct fw_iso_context *ctx);
void fw_iso_context_destroy(struct fw_iso_context *ctx);

#endif /* _LINUX_FIREWIRE_H */
Commit	Line	Data
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
a1a1132b	35	#define CSR_PRIORITY_BUDGET 0x218
77c9a5da SR	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
3d1f46eb	41	#define CSR_MAINT_UTILITY 0x230
77c9a5da SR	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
	52
	53	#define CSR_OFFSET 0x40
	54	#define CSR_LEAF 0x80
	55	#define CSR_DIRECTORY 0xc0
	56
	57	#define CSR_DESCRIPTOR 0x01
	58	#define CSR_VENDOR 0x03
	59	#define CSR_HARDWARE_VERSION 0x04
77c9a5da SR	60	#define CSR_UNIT 0x11
	61	#define CSR_SPECIFIER_ID 0x12
	62	#define CSR_VERSION 0x13
	63	#define CSR_DEPENDENT_INFO 0x14
	64	#define CSR_MODEL 0x17
77c9a5da SR	65	#define CSR_DIRECTORY_ID 0x20
	66
	67	struct fw_csr_iterator {
13b302d0 SR	68	const u32 *p;
13b302d0 SR	69	const u32 *end;
77c9a5da SR	70	};
77c9a5da SR	71
13b302d0	72	void fw_csr_iterator_init(struct fw_csr_iterator ci, const u32 p);
77c9a5da	73	int fw_csr_iterator_next(struct fw_csr_iterator ci, int key, int *value);
13b302d0	74	int fw_csr_string(const u32 directory, int key, char buf, size_t size);
1f8fef7b	75
77c9a5da SR	76	extern struct bus_type fw_bus_type;
	77
	78	struct fw_card_driver;
	79	struct fw_node;
	80
	81	struct fw_card {
	82	const struct fw_card_driver *driver;
	83	struct device *device;
	84	struct kref kref;
	85	struct completion done;
	86
	87	int node_id;
	88	int generation;
1e626fdc SR	89	int current_tlabel;
1e626fdc SR	90	u64 tlabel_mask;
77c9a5da	91	struct list_head transaction_list;
77c9a5da SR	92	unsigned long reset_jiffies;
77c9a5da SR	93
8e4b50f9 CL	94	u32 split_timeout_hi;
	95	u32 split_timeout_lo;
	96	unsigned int split_timeout_cycles;
	97	unsigned int split_timeout_jiffies;
	98
77c9a5da SR	99	unsigned long long guid;
	100	unsigned max_receive;
	101	int link_speed;
	102	int config_rom_generation;
	103
	104	spinlock_t lock; /* Take this lock when handling the lists in
	105	* this struct. */
	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 */
	110	int gap_count;
	111	bool beta_repeaters_present;
	112
	113	int index;
	114
	115	struct list_head link;
	116
02d37bed SR	117	struct delayed_work br_work; /* bus reset job */
	118	bool br_short;
	119
	120	struct delayed_work bm_work; /* bus manager job */
77c9a5da SR	121	int bm_retries;
77c9a5da SR	122	int bm_generation;
6fdc0370	123	__be32 bm_transaction_data[2];
250b2b6d	124	int bm_node_id;
c8a94ded	125	bool bm_abdicate;
77c9a5da	126
db3c9cc1 SR	127	bool priority_budget_implemented; /* controller feature */
	128	bool broadcast_channel_auto_allocated; /* controller feature */
	129
77c9a5da SR	130	bool broadcast_channel_allocated;
77c9a5da SR	131	u32 broadcast_channel;
cb7c96da	132	__be32 topology_map[(CSR_TOPOLOGY_MAP_END - CSR_TOPOLOGY_MAP) / 4];
3d1f46eb CL	133
3d1f46eb CL	134	__be32 maint_utility_register;
77c9a5da SR	135	};
77c9a5da SR	136
77c9a5da SR	137	struct fw_attribute_group {
	138	struct attribute_group *groups[2];
	139	struct attribute_group group;
	140	struct attribute *attrs[12];
	141	};
	142
	143	enum fw_device_state {
	144	FW_DEVICE_INITIALIZING,
	145	FW_DEVICE_RUNNING,
	146	FW_DEVICE_GONE,
	147	FW_DEVICE_SHUTDOWN,
	148	};
	149
	150	/*
	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
	154	* to a bus reset.
	155	*
	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.
	159	*
	160	* The same applies to fw_device.card->node_id vs. fw_device.generation.
	161	*
	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.
	166	*/
	167	struct fw_device {
	168	atomic_t state;
	169	struct fw_node *node;
	170	int node_id;
	171	int generation;
	172	unsigned max_speed;
	173	struct fw_card *card;
	174	struct device device;
	175
	176	struct mutex client_list_mutex;
	177	struct list_head client_list;
	178
13b302d0	179	const u32 *config_rom;
77c9a5da SR	180	size_t config_rom_length;
	181	int config_rom_retries;
	182	unsigned is_local:1;
837ec787	183	unsigned max_rec:4;
77c9a5da	184	unsigned cmc:1;
837ec787	185	unsigned irmc:1;
77c9a5da SR	186	unsigned bc_implemented:2;
	187
	188	struct delayed_work work;
	189	struct fw_attribute_group attribute_group;
	190	};
	191
	192	static inline struct fw_device fw_device(struct device dev)
	193	{
	194	return container_of(dev, struct fw_device, device);
	195	}
	196
	197	static inline int fw_device_is_shutdown(struct fw_device *device)
	198	{
	199	return atomic_read(&device->state) == FW_DEVICE_SHUTDOWN;
	200	}
	201
	202	static inline struct fw_device fw_device_get(struct fw_device device)
	203	{
	204	get_device(&device->device);
	205
	206	return device;
	207	}
	208
	209	static inline void fw_device_put(struct fw_device *device)
	210	{
	211	put_device(&device->device);
	212	}
	213
	214	int fw_device_enable_phys_dma(struct fw_device *device);
	215
	216	/*
	217	* fw_unit.directory must not be accessed after device_del(&fw_unit.device).
	218	*/
	219	struct fw_unit {
	220	struct device device;
13b302d0	221	const u32 *directory;
77c9a5da SR	222	struct fw_attribute_group attribute_group;
	223	};
	224
	225	static inline struct fw_unit fw_unit(struct device dev)
	226	{
	227	return container_of(dev, struct fw_unit, device);
	228	}
	229
	230	static inline struct fw_unit fw_unit_get(struct fw_unit unit)
	231	{
	232	get_device(&unit->device);
	233
	234	return unit;
	235	}
	236
	237	static inline void fw_unit_put(struct fw_unit *unit)
	238	{
	239	put_device(&unit->device);
	240	}
	241
e5110d01 SR	242	static inline struct fw_device fw_parent_device(struct fw_unit unit)
	243	{
	244	return fw_device(unit->device.parent);
	245	}
	246
77c9a5da SR	247	struct ieee1394_device_id;
	248
	249	struct fw_driver {
	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;
	254	};
	255
	256	struct fw_packet;
	257	struct fw_request;
	258
	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);
	264	/*
db5d247a CL	265	* Important note: Except for the FCP registers, the callback must guarantee
db5d247a CL	266	* that either fw_send_response() or kfree() is called on the @request.
77c9a5da SR	267	*/
	268	typedef void (fw_address_callback_t)(struct fw_card card,
	269	struct fw_request *request,
	270	int tcode, int destination, int source,
33e553fe	271	int generation,
77c9a5da SR	272	unsigned long long offset,
	273	void *data, size_t length,
	274	void *callback_data);
	275
	276	struct fw_packet {
	277	int speed;
	278	int generation;
	279	u32 header[4];
	280	size_t header_length;
	281	void *payload;
	282	size_t payload_length;
	283	dma_addr_t payload_bus;
19593ffd	284	bool payload_mapped;
77c9a5da SR	285	u32 timestamp;
	286
	287	/*
	288	* This callback is called when the packet transmission has
	289	* completed; for successful transmission, the status code is
	290	* the ack received from the destination, otherwise it's a
	291	* negative errno: ENOMEM, ESTALE, ETIMEDOUT, ENODEV, EIO.
	292	* The callback can be called from tasklet context and thus
	293	* must never block.
	294	*/
	295	fw_packet_callback_t callback;
	296	int ack;
	297	struct list_head link;
	298	void *driver_data;
	299	};
	300
	301	struct fw_transaction {
	302	int node_id; /* The generation is implied; it is always the current. */
	303	int tlabel;
	304	int timestamp;
	305	struct list_head link;
5c40cbfe CL	306	struct fw_card *card;
5c40cbfe CL	307	struct timer_list split_timeout_timer;
77c9a5da SR	308
	309	struct fw_packet packet;
	310
	311	/*
	312	* The data passed to the callback is valid only during the
	313	* callback.
	314	*/
	315	fw_transaction_callback_t callback;
	316	void *callback_data;
	317	};
	318
	319	struct fw_address_handler {
	320	u64 offset;
	321	size_t length;
	322	fw_address_callback_t address_callback;
	323	void *callback_data;
	324	struct list_head link;
	325	};
	326
	327	struct fw_address_region {
	328	u64 start;
	329	u64 end;
	330	};
	331
	332	extern const struct fw_address_region fw_high_memory_region;
	333
	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);
	348
c76acec6 JF	349	static inline int fw_stream_packet_destination_id(int tag, int channel, int sy)
	350	{
	351	return tag << 14 \| channel << 8 \| sy;
	352	}
	353
	354	struct fw_descriptor {
	355	struct list_head link;
	356	size_t length;
	357	u32 immediate;
	358	u32 key;
	359	const u32 *data;
	360	};
	361
	362	int fw_core_add_descriptor(struct fw_descriptor *desc);
	363	void fw_core_remove_descriptor(struct fw_descriptor *desc);
	364
	365	/*
	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).
	372	*/
	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. */
	377	u32 tag:2;
	378	u32 sy:4;
	379	u32 header_length:8; /* Length of immediate header. */
	380	u32 header[0];
	381	};
	382
	383	#define FW_ISO_CONTEXT_TRANSMIT 0
	384	#define FW_ISO_CONTEXT_RECEIVE 1
	385
	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
	391
	392	/*
	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.
	398	*/
	399	struct fw_iso_buffer {
	400	enum dma_data_direction direction;
	401	struct page **pages;
	402	int page_count;
	403	};
	404
	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);
	408
	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;
415	int type;
416	int channel;
417	int speed;
418	size_t header_size;
419	fw_iso_callback_t callback;
420	void *callback_data;
421	};
422
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);
434
77c9a5da	435	#endif /* _LINUX_FIREWIRE_H */