[mirror_ubuntu-zesty-kernel.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 <linux/atomic.h>
#include <asm/byteorder.h>

#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_OMPR			0x900
#define CSR_OPCR(i)			(0x904 + (i) * 4)
#define CSR_IMPR			0x980
#define CSR_IPCR(i)			(0x984 + (i) * 4)
#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;
	u64 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 list_head phy_receiver_list;

	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;
	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;
}

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 is one of the juju-specific
	 * rcodes:  RCODE_SEND_ERROR, _CANCELLED, _BUSY, _GENERATION, _NO_ACK.
	 * 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;
	struct list_head link;
	struct fw_card *card;
	bool is_split_transaction;
	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;		/* tx: Set to not send packet at all	*/
				/* rx: Sync bit, wait for matching sy	*/
	u32 tag:2;		/* tx: Tag in packet header		*/
	u32 sy:4;		/* tx: Sy in packet header		*/
	u32 header_length:8;	/* Length of immediate header		*/
	u32 header[0];		/* tx: Top of 1394 isoch. data_block	*/
};

#define FW_ISO_CONTEXT_TRANSMIT			0
#define FW_ISO_CONTEXT_RECEIVE			1
#define FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL	2

#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);
size_t fw_iso_buffer_lookup(struct fw_iso_buffer *buffer, dma_addr_t completed);

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);
typedef void (*fw_iso_mc_callback_t)(struct fw_iso_context *context,
				     dma_addr_t completed, void *data);
struct fw_iso_context {
	struct fw_card *card;
	int type;
	int channel;
	int speed;
	size_t header_size;
	union {
		fw_iso_callback_t sc;
		fw_iso_mc_callback_t mc;
	} 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_set_channels(struct fw_iso_context *ctx, u64 *channels);
int fw_iso_context_queue(struct fw_iso_context *ctx,
			 struct fw_iso_packet *packet,
			 struct fw_iso_buffer *buffer,
			 unsigned long payload);
void fw_iso_context_queue_flush(struct fw_iso_context *ctx);
int fw_iso_context_flush_completions(struct fw_iso_context *ctx);
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);
void fw_iso_resource_manage(struct fw_card *card, int generation,
			    u64 channels_mask, int *channel, int *bandwidth,
			    bool allocate);

extern struct workqueue_struct *fw_workqueue;

#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>
f68c56b7	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
60063497	17	#include <linux/atomic.h>
77c9a5da SR	18	#include <asm/byteorder.h>
77c9a5da SR	19
77c9a5da SR	20	#define CSR_REGISTER_BASE 0xfffff0000000ULL
	21
	22	/* register offsets are relative to CSR_REGISTER_BASE */
	23	#define CSR_STATE_CLEAR 0x0
	24	#define CSR_STATE_SET 0x4
	25	#define CSR_NODE_IDS 0x8
	26	#define CSR_RESET_START 0xc
	27	#define CSR_SPLIT_TIMEOUT_HI 0x18
	28	#define CSR_SPLIT_TIMEOUT_LO 0x1c
	29	#define CSR_CYCLE_TIME 0x200
	30	#define CSR_BUS_TIME 0x204
	31	#define CSR_BUSY_TIMEOUT 0x210
a1a1132b	32	#define CSR_PRIORITY_BUDGET 0x218
77c9a5da SR	33	#define CSR_BUS_MANAGER_ID 0x21c
	34	#define CSR_BANDWIDTH_AVAILABLE 0x220
	35	#define CSR_CHANNELS_AVAILABLE 0x224
	36	#define CSR_CHANNELS_AVAILABLE_HI 0x224
	37	#define CSR_CHANNELS_AVAILABLE_LO 0x228
3d1f46eb	38	#define CSR_MAINT_UTILITY 0x230
77c9a5da SR	39	#define CSR_BROADCAST_CHANNEL 0x234
	40	#define CSR_CONFIG_ROM 0x400
	41	#define CSR_CONFIG_ROM_END 0x800
31ef9134 CL	42	#define CSR_OMPR 0x900
	43	#define CSR_OPCR(i) (0x904 + (i) * 4)
	44	#define CSR_IMPR 0x980
	45	#define CSR_IPCR(i) (0x984 + (i) * 4)
77c9a5da SR	46	#define CSR_FCP_COMMAND 0xB00
	47	#define CSR_FCP_RESPONSE 0xD00
	48	#define CSR_FCP_END 0xF00
	49	#define CSR_TOPOLOGY_MAP 0x1000
	50	#define CSR_TOPOLOGY_MAP_END 0x1400
	51	#define CSR_SPEED_MAP 0x2000
	52	#define CSR_SPEED_MAP_END 0x3000
	53
	54	#define CSR_OFFSET 0x40
	55	#define CSR_LEAF 0x80
	56	#define CSR_DIRECTORY 0xc0
	57
	58	#define CSR_DESCRIPTOR 0x01
	59	#define CSR_VENDOR 0x03
	60	#define CSR_HARDWARE_VERSION 0x04
77c9a5da SR	61	#define CSR_UNIT 0x11
	62	#define CSR_SPECIFIER_ID 0x12
	63	#define CSR_VERSION 0x13
	64	#define CSR_DEPENDENT_INFO 0x14
	65	#define CSR_MODEL 0x17
77c9a5da SR	66	#define CSR_DIRECTORY_ID 0x20
	67
	68	struct fw_csr_iterator {
13b302d0 SR	69	const u32 *p;
13b302d0 SR	70	const u32 *end;
77c9a5da SR	71	};
77c9a5da SR	72
13b302d0	73	void fw_csr_iterator_init(struct fw_csr_iterator ci, const u32 p);
77c9a5da	74	int fw_csr_iterator_next(struct fw_csr_iterator ci, int key, int *value);
13b302d0	75	int fw_csr_string(const u32 directory, int key, char buf, size_t size);
1f8fef7b	76
77c9a5da SR	77	extern struct bus_type fw_bus_type;
	78
	79	struct fw_card_driver;
	80	struct fw_node;
	81
	82	struct fw_card {
	83	const struct fw_card_driver *driver;
	84	struct device *device;
	85	struct kref kref;
	86	struct completion done;
	87
	88	int node_id;
	89	int generation;
1e626fdc SR	90	int current_tlabel;
1e626fdc SR	91	u64 tlabel_mask;
77c9a5da	92	struct list_head transaction_list;
e71084af	93	u64 reset_jiffies;
77c9a5da	94
8e4b50f9 CL	95	u32 split_timeout_hi;
	96	u32 split_timeout_lo;
	97	unsigned int split_timeout_cycles;
	98	unsigned int split_timeout_jiffies;
	99
77c9a5da SR	100	unsigned long long guid;
	101	unsigned max_receive;
	102	int link_speed;
	103	int config_rom_generation;
	104
	105	spinlock_t lock; /* Take this lock when handling the lists in
	106	* this struct. */
	107	struct fw_node *local_node;
	108	struct fw_node *root_node;
	109	struct fw_node *irm_node;
	110	u8 color; /* must be u8 to match the definition in struct fw_node */
	111	int gap_count;
	112	bool beta_repeaters_present;
	113
	114	int index;
77c9a5da SR	115	struct list_head link;
77c9a5da SR	116
bf54e146 SR	117	struct list_head phy_receiver_list;
bf54e146 SR	118
02d37bed SR	119	struct delayed_work br_work; /* bus reset job */
	120	bool br_short;
	121
	122	struct delayed_work bm_work; /* bus manager job */
77c9a5da SR	123	int bm_retries;
77c9a5da SR	124	int bm_generation;
250b2b6d	125	int bm_node_id;
c8a94ded	126	bool bm_abdicate;
77c9a5da	127
db3c9cc1 SR	128	bool priority_budget_implemented; /* controller feature */
	129	bool broadcast_channel_auto_allocated; /* controller feature */
	130
77c9a5da SR	131	bool broadcast_channel_allocated;
77c9a5da SR	132	u32 broadcast_channel;
cb7c96da	133	__be32 topology_map[(CSR_TOPOLOGY_MAP_END - CSR_TOPOLOGY_MAP) / 4];
3d1f46eb CL	134
3d1f46eb CL	135	__be32 maint_utility_register;
77c9a5da SR	136	};
77c9a5da SR	137
77c9a5da SR	138	struct fw_attribute_group {
	139	struct attribute_group *groups[2];
	140	struct attribute_group group;
	141	struct attribute *attrs[12];
	142	};
	143
	144	enum fw_device_state {
	145	FW_DEVICE_INITIALIZING,
	146	FW_DEVICE_RUNNING,
	147	FW_DEVICE_GONE,
	148	FW_DEVICE_SHUTDOWN,
	149	};
	150
	151	/*
	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
	155	* to a bus reset.
	156	*
	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.
	160	*
	161	* The same applies to fw_device.card->node_id vs. fw_device.generation.
	162	*
	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.
	167	*/
	168	struct fw_device {
	169	atomic_t state;
	170	struct fw_node *node;
	171	int node_id;
	172	int generation;
	173	unsigned max_speed;
	174	struct fw_card *card;
	175	struct device device;
	176
	177	struct mutex client_list_mutex;
	178	struct list_head client_list;
	179
13b302d0	180	const u32 *config_rom;
77c9a5da SR	181	size_t config_rom_length;
	182	int config_rom_retries;
	183	unsigned is_local:1;
837ec787	184	unsigned max_rec:4;
77c9a5da	185	unsigned cmc:1;
837ec787	186	unsigned irmc:1;
77c9a5da SR	187	unsigned bc_implemented:2;
	188
	189	struct delayed_work work;
	190	struct fw_attribute_group attribute_group;
	191	};
	192
	193	static inline struct fw_device fw_device(struct device dev)
	194	{
	195	return container_of(dev, struct fw_device, device);
	196	}
	197
	198	static inline int fw_device_is_shutdown(struct fw_device *device)
	199	{
	200	return atomic_read(&device->state) == FW_DEVICE_SHUTDOWN;
	201	}
	202
77c9a5da SR	203	int fw_device_enable_phys_dma(struct fw_device *device);
	204
	205	/*
	206	* fw_unit.directory must not be accessed after device_del(&fw_unit.device).
	207	*/
	208	struct fw_unit {
	209	struct device device;
13b302d0	210	const u32 *directory;
77c9a5da SR	211	struct fw_attribute_group attribute_group;
	212	};
	213
	214	static inline struct fw_unit fw_unit(struct device dev)
	215	{
	216	return container_of(dev, struct fw_unit, device);
	217	}
	218
	219	static inline struct fw_unit fw_unit_get(struct fw_unit unit)
	220	{
	221	get_device(&unit->device);
	222
	223	return unit;
	224	}
	225
	226	static inline void fw_unit_put(struct fw_unit *unit)
	227	{
	228	put_device(&unit->device);
	229	}
	230
e5110d01 SR	231	static inline struct fw_device fw_parent_device(struct fw_unit unit)
	232	{
	233	return fw_device(unit->device.parent);
	234	}
	235
77c9a5da SR	236	struct ieee1394_device_id;
	237
	238	struct fw_driver {
	239	struct device_driver driver;
	240	/* Called when the parent device sits through a bus reset. */
	241	void (update)(struct fw_unit unit);
	242	const struct ieee1394_device_id *id_table;
	243	};
	244
	245	struct fw_packet;
	246	struct fw_request;
	247
	248	typedef void (fw_packet_callback_t)(struct fw_packet packet,
	249	struct fw_card *card, int status);
	250	typedef void (fw_transaction_callback_t)(struct fw_card card, int rcode,
	251	void *data, size_t length,
	252	void *callback_data);
	253	/*
db5d247a CL	254	* Important note: Except for the FCP registers, the callback must guarantee
db5d247a CL	255	* that either fw_send_response() or kfree() is called on the @request.
77c9a5da SR	256	*/
	257	typedef void (fw_address_callback_t)(struct fw_card card,
	258	struct fw_request *request,
	259	int tcode, int destination, int source,
33e553fe	260	int generation,
77c9a5da SR	261	unsigned long long offset,
	262	void *data, size_t length,
	263	void *callback_data);
	264
	265	struct fw_packet {
	266	int speed;
	267	int generation;
	268	u32 header[4];
	269	size_t header_length;
	270	void *payload;
	271	size_t payload_length;
	272	dma_addr_t payload_bus;
19593ffd	273	bool payload_mapped;
77c9a5da SR	274	u32 timestamp;
	275
	276	/*
18d0cdfd SR	277	* This callback is called when the packet transmission has completed.
	278	* For successful transmission, the status code is the ack received
	279	* from the destination. Otherwise it is one of the juju-specific
	280	* rcodes: RCODE_SEND_ERROR, _CANCELLED, _BUSY, _GENERATION, _NO_ACK.
77c9a5da SR	281	* The callback can be called from tasklet context and thus
	282	* must never block.
	283	*/
	284	fw_packet_callback_t callback;
	285	int ack;
	286	struct list_head link;
	287	void *driver_data;
	288	};
	289
	290	struct fw_transaction {
	291	int node_id; /* The generation is implied; it is always the current. */
	292	int tlabel;
77c9a5da	293	struct list_head link;
5c40cbfe	294	struct fw_card *card;
410cf2bd	295	bool is_split_transaction;
5c40cbfe	296	struct timer_list split_timeout_timer;
77c9a5da SR	297
	298	struct fw_packet packet;
	299
	300	/*
	301	* The data passed to the callback is valid only during the
	302	* callback.
	303	*/
	304	fw_transaction_callback_t callback;
	305	void *callback_data;
	306	};
	307
	308	struct fw_address_handler {
	309	u64 offset;
	310	size_t length;
	311	fw_address_callback_t address_callback;
	312	void *callback_data;
	313	struct list_head link;
	314	};
	315
	316	struct fw_address_region {
	317	u64 start;
	318	u64 end;
	319	};
	320
	321	extern const struct fw_address_region fw_high_memory_region;
	322
	323	int fw_core_add_address_handler(struct fw_address_handler *handler,
	324	const struct fw_address_region *region);
	325	void fw_core_remove_address_handler(struct fw_address_handler *handler);
	326	void fw_send_response(struct fw_card *card,
	327	struct fw_request *request, int rcode);
	328	void fw_send_request(struct fw_card card, struct fw_transaction t,
	329	int tcode, int destination_id, int generation, int speed,
	330	unsigned long long offset, void *payload, size_t length,
	331	fw_transaction_callback_t callback, void *callback_data);
	332	int fw_cancel_transaction(struct fw_card *card,
	333	struct fw_transaction *transaction);
	334	int fw_run_transaction(struct fw_card *card, int tcode, int destination_id,
	335	int generation, int speed, unsigned long long offset,
	336	void *payload, size_t length);
	337
c76acec6 JF	338	static inline int fw_stream_packet_destination_id(int tag, int channel, int sy)
	339	{
	340	return tag << 14 \| channel << 8 \| sy;
	341	}
	342
	343	struct fw_descriptor {
	344	struct list_head link;
	345	size_t length;
	346	u32 immediate;
	347	u32 key;
	348	const u32 *data;
	349	};
	350
	351	int fw_core_add_descriptor(struct fw_descriptor *desc);
	352	void fw_core_remove_descriptor(struct fw_descriptor *desc);
	353
	354	/*
	355	* The iso packet format allows for an immediate header/payload part
	356	* stored in 'header' immediately after the packet info plus an
	357	* indirect payload part that is pointer to by the 'payload' field.
	358	* Applications can use one or the other or both to implement simple
	359	* low-bandwidth streaming (e.g. audio) or more advanced
	360	* scatter-gather streaming (e.g. assembling video frame automatically).
	361	*/
	362	struct fw_iso_packet {
872e330e SR	363	u16 payload_length; /* Length of indirect payload */
	364	u32 interrupt:1; /* Generate interrupt on this packet */
	365	u32 skip:1; /* tx: Set to not send packet at all */
	366	/* rx: Sync bit, wait for matching sy */
	367	u32 tag:2; /* tx: Tag in packet header */
	368	u32 sy:4; /* tx: Sy in packet header */
	369	u32 header_length:8; /* Length of immediate header */
	370	u32 header[0]; /* tx: Top of 1394 isoch. data_block */
c76acec6 JF	371	};
c76acec6 JF	372
872e330e SR	373	#define FW_ISO_CONTEXT_TRANSMIT 0
	374	#define FW_ISO_CONTEXT_RECEIVE 1
	375	#define FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL 2
c76acec6 JF	376
	377	#define FW_ISO_CONTEXT_MATCH_TAG0 1
	378	#define FW_ISO_CONTEXT_MATCH_TAG1 2
	379	#define FW_ISO_CONTEXT_MATCH_TAG2 4
	380	#define FW_ISO_CONTEXT_MATCH_TAG3 8
	381	#define FW_ISO_CONTEXT_MATCH_ALL_TAGS 15
	382
	383	/*
	384	* An iso buffer is just a set of pages mapped for DMA in the
	385	* specified direction. Since the pages are to be used for DMA, they
	386	* are not mapped into the kernel virtual address space. We store the
	387	* DMA address in the page private. The helper function
	388	* fw_iso_buffer_map() will map the pages into a given vma.
	389	*/
	390	struct fw_iso_buffer {
	391	enum dma_data_direction direction;
	392	struct page **pages;
	393	int page_count;
	394	};
	395
	396	int fw_iso_buffer_init(struct fw_iso_buffer buffer, struct fw_card card,
	397	int page_count, enum dma_data_direction direction);
	398	void fw_iso_buffer_destroy(struct fw_iso_buffer buffer, struct fw_card card);
872e330e	399	size_t fw_iso_buffer_lookup(struct fw_iso_buffer *buffer, dma_addr_t completed);
c76acec6 JF	400
	401	struct fw_iso_context;
	402	typedef void (fw_iso_callback_t)(struct fw_iso_context context,
	403	u32 cycle, size_t header_length,
	404	void header, void data);
872e330e SR	405	typedef void (fw_iso_mc_callback_t)(struct fw_iso_context context,
872e330e SR	406	dma_addr_t completed, void *data);
c76acec6 JF	407	struct fw_iso_context {
	408	struct fw_card *card;
	409	int type;
	410	int channel;
	411	int speed;
	412	size_t header_size;
872e330e SR	413	union {
	414	fw_iso_callback_t sc;
	415	fw_iso_mc_callback_t mc;
	416	} callback;
c76acec6 JF	417	void *callback_data;
	418	};
	419
	420	struct fw_iso_context fw_iso_context_create(struct fw_card card,
	421	int type, int channel, int speed, size_t header_size,
	422	fw_iso_callback_t callback, void *callback_data);
872e330e	423	int fw_iso_context_set_channels(struct fw_iso_context ctx, u64 channels);
c76acec6 JF	424	int fw_iso_context_queue(struct fw_iso_context *ctx,
	425	struct fw_iso_packet *packet,
	426	struct fw_iso_buffer *buffer,
	427	unsigned long payload);
13882a82	428	void fw_iso_context_queue_flush(struct fw_iso_context *ctx);
d1bbd209	429	int fw_iso_context_flush_completions(struct fw_iso_context *ctx);
c76acec6 JF	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);
31ef9134 CL	434	void fw_iso_resource_manage(struct fw_card *card, int generation,
31ef9134 CL	435	u64 channels_mask, int channel, int bandwidth,
f30e6d3e	436	bool allocate);
c76acec6	437
105e53f8 SR	438	extern struct workqueue_struct *fw_workqueue;
105e53f8 SR	439
77c9a5da	440	#endif /* _LINUX_FIREWIRE_H */