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Release 4.12 include/linux/firewire.h

Directory: include/linux
#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;
};




static inline struct fw_card *fw_card_get(struct fw_card *card)
{
	kref_get(&card->kref);

	return card;
}


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void fw_card_release(struct kref *kref);




static inline void fw_card_put(struct fw_card *card)
{
	kref_put(&card->kref, fw_card_release);
}


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struct fw_attribute_group {
	
struct attribute_group *groups[2];
	
struct attribute_group group;
	
struct attribute *attrs[13];
};


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;

	
work_func_t workfn;
	
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);
}


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


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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);
}


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

	return unit;
}


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


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


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struct ieee1394_device_id;


struct fw_driver {
	
struct device_driver driver;
	
int (*probe)(struct fw_unit *unit, const struct ieee1394_device_id *id);
	/* Called when the parent device sits through a bus reset. */
	
void (*update)(struct fw_unit *unit);
	
void (*remove)(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);
/*
 * This callback handles an inbound request subaction.  It is called in
 * RCU read-side context, therefore must not sleep.
 *
 * The callback should not initiate outbound request subactions directly.
 * Otherwise there is a danger of recursion of inbound and outbound
 * transactions from and to the local node.
 *
 * The callback is responsible that either fw_send_response() or kfree()
 * is called on the @request, except for FCP registers for which the core
 * takes care of that.
 */

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;
	
u64 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);
int fw_get_request_speed(struct fw_request *request);
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);
const char *fw_rcode_string(int rcode);




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


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void fw_schedule_bus_reset(struct fw_card *card, bool delayed,
			   bool short_reset);


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 page_count_mapped;
};

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;
	
bool drop_overflow_headers;
	
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 */

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Kristian Högsberg32118.47%1118.64%


Clemens Ladisch1398.00%1525.42%


Chris Boot653.74%23.39%


Takashi Sakamoto150.86%11.69%


Jay Fenlason, Stefan Richter70.40%11.69%


Paul Gortmaker30.17%11.69%


Tejun Heo30.17%11.69%


Arun Sharma10.06%11.69%


Total1738100.00%59100.00%


Directory: include/linux



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