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![Stefan Richter](/assets/img/avatar_default.png)
Retrieval of an fw_unit's parent is a common pattern in high-level code. Wrap it up as device = fw_parent_device(unit). Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
355 lines
9 KiB
C
355 lines
9 KiB
C
#ifndef _LINUX_FIREWIRE_H
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#define _LINUX_FIREWIRE_H
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#include <linux/completion.h>
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#include <linux/device.h>
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#include <linux/kernel.h>
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#include <linux/kref.h>
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#include <linux/list.h>
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#include <linux/mutex.h>
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#include <linux/spinlock.h>
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#include <linux/sysfs.h>
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#include <linux/timer.h>
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#include <linux/types.h>
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#include <linux/workqueue.h>
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#include <asm/atomic.h>
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#include <asm/byteorder.h>
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#define fw_notify(s, args...) printk(KERN_NOTICE KBUILD_MODNAME ": " s, ## args)
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#define fw_error(s, args...) printk(KERN_ERR KBUILD_MODNAME ": " s, ## args)
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static inline void fw_memcpy_from_be32(void *_dst, void *_src, size_t size)
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{
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u32 *dst = _dst;
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__be32 *src = _src;
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int i;
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for (i = 0; i < size / 4; i++)
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dst[i] = be32_to_cpu(src[i]);
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}
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static inline void fw_memcpy_to_be32(void *_dst, void *_src, size_t size)
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{
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fw_memcpy_from_be32(_dst, _src, size);
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}
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#define CSR_REGISTER_BASE 0xfffff0000000ULL
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/* register offsets are relative to CSR_REGISTER_BASE */
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#define CSR_STATE_CLEAR 0x0
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#define CSR_STATE_SET 0x4
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#define CSR_NODE_IDS 0x8
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#define CSR_RESET_START 0xc
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#define CSR_SPLIT_TIMEOUT_HI 0x18
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#define CSR_SPLIT_TIMEOUT_LO 0x1c
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#define CSR_CYCLE_TIME 0x200
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#define CSR_BUS_TIME 0x204
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#define CSR_BUSY_TIMEOUT 0x210
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#define CSR_BUS_MANAGER_ID 0x21c
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#define CSR_BANDWIDTH_AVAILABLE 0x220
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#define CSR_CHANNELS_AVAILABLE 0x224
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#define CSR_CHANNELS_AVAILABLE_HI 0x224
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#define CSR_CHANNELS_AVAILABLE_LO 0x228
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#define CSR_BROADCAST_CHANNEL 0x234
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#define CSR_CONFIG_ROM 0x400
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#define CSR_CONFIG_ROM_END 0x800
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#define CSR_FCP_COMMAND 0xB00
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#define CSR_FCP_RESPONSE 0xD00
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#define CSR_FCP_END 0xF00
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#define CSR_TOPOLOGY_MAP 0x1000
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#define CSR_TOPOLOGY_MAP_END 0x1400
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#define CSR_SPEED_MAP 0x2000
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#define CSR_SPEED_MAP_END 0x3000
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#define CSR_OFFSET 0x40
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#define CSR_LEAF 0x80
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#define CSR_DIRECTORY 0xc0
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#define CSR_DESCRIPTOR 0x01
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#define CSR_VENDOR 0x03
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#define CSR_HARDWARE_VERSION 0x04
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#define CSR_NODE_CAPABILITIES 0x0c
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#define CSR_UNIT 0x11
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#define CSR_SPECIFIER_ID 0x12
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#define CSR_VERSION 0x13
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#define CSR_DEPENDENT_INFO 0x14
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#define CSR_MODEL 0x17
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#define CSR_INSTANCE 0x18
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#define CSR_DIRECTORY_ID 0x20
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struct fw_csr_iterator {
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u32 *p;
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u32 *end;
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};
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void fw_csr_iterator_init(struct fw_csr_iterator *ci, u32 *p);
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int fw_csr_iterator_next(struct fw_csr_iterator *ci, int *key, int *value);
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extern struct bus_type fw_bus_type;
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struct fw_card_driver;
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struct fw_node;
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struct fw_card {
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const struct fw_card_driver *driver;
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struct device *device;
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struct kref kref;
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struct completion done;
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int node_id;
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int generation;
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int current_tlabel, tlabel_mask;
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struct list_head transaction_list;
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struct timer_list flush_timer;
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unsigned long reset_jiffies;
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unsigned long long guid;
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unsigned max_receive;
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int link_speed;
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int config_rom_generation;
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spinlock_t lock; /* Take this lock when handling the lists in
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* this struct. */
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struct fw_node *local_node;
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struct fw_node *root_node;
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struct fw_node *irm_node;
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u8 color; /* must be u8 to match the definition in struct fw_node */
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int gap_count;
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bool beta_repeaters_present;
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int index;
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struct list_head link;
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/* Work struct for BM duties. */
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struct delayed_work work;
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int bm_retries;
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int bm_generation;
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bool broadcast_channel_allocated;
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u32 broadcast_channel;
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u32 topology_map[(CSR_TOPOLOGY_MAP_END - CSR_TOPOLOGY_MAP) / 4];
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};
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static inline struct fw_card *fw_card_get(struct fw_card *card)
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{
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kref_get(&card->kref);
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return card;
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}
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void fw_card_release(struct kref *kref);
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static inline void fw_card_put(struct fw_card *card)
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{
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kref_put(&card->kref, fw_card_release);
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}
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struct fw_attribute_group {
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struct attribute_group *groups[2];
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struct attribute_group group;
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struct attribute *attrs[12];
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};
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enum fw_device_state {
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FW_DEVICE_INITIALIZING,
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FW_DEVICE_RUNNING,
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FW_DEVICE_GONE,
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FW_DEVICE_SHUTDOWN,
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};
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/*
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* Note, fw_device.generation always has to be read before fw_device.node_id.
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* Use SMP memory barriers to ensure this. Otherwise requests will be sent
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* to an outdated node_id if the generation was updated in the meantime due
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* to a bus reset.
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*
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* Likewise, fw-core will take care to update .node_id before .generation so
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* that whenever fw_device.generation is current WRT the actual bus generation,
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* fw_device.node_id is guaranteed to be current too.
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*
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* The same applies to fw_device.card->node_id vs. fw_device.generation.
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*
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* fw_device.config_rom and fw_device.config_rom_length may be accessed during
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* the lifetime of any fw_unit belonging to the fw_device, before device_del()
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* was called on the last fw_unit. Alternatively, they may be accessed while
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* holding fw_device_rwsem.
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*/
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struct fw_device {
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atomic_t state;
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struct fw_node *node;
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int node_id;
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int generation;
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unsigned max_speed;
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struct fw_card *card;
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struct device device;
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struct mutex client_list_mutex;
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struct list_head client_list;
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u32 *config_rom;
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size_t config_rom_length;
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int config_rom_retries;
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unsigned is_local:1;
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unsigned cmc:1;
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unsigned bc_implemented:2;
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struct delayed_work work;
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struct fw_attribute_group attribute_group;
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};
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static inline struct fw_device *fw_device(struct device *dev)
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{
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return container_of(dev, struct fw_device, device);
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}
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static inline int fw_device_is_shutdown(struct fw_device *device)
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{
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return atomic_read(&device->state) == FW_DEVICE_SHUTDOWN;
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}
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static inline struct fw_device *fw_device_get(struct fw_device *device)
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{
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get_device(&device->device);
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return device;
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}
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static inline void fw_device_put(struct fw_device *device)
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{
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put_device(&device->device);
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}
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int fw_device_enable_phys_dma(struct fw_device *device);
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/*
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* fw_unit.directory must not be accessed after device_del(&fw_unit.device).
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*/
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struct fw_unit {
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struct device device;
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u32 *directory;
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struct fw_attribute_group attribute_group;
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};
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static inline struct fw_unit *fw_unit(struct device *dev)
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{
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return container_of(dev, struct fw_unit, device);
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}
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static inline struct fw_unit *fw_unit_get(struct fw_unit *unit)
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{
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get_device(&unit->device);
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return unit;
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}
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static inline void fw_unit_put(struct fw_unit *unit)
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{
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put_device(&unit->device);
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}
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static inline struct fw_device *fw_parent_device(struct fw_unit *unit)
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{
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return fw_device(unit->device.parent);
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}
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struct ieee1394_device_id;
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struct fw_driver {
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struct device_driver driver;
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/* Called when the parent device sits through a bus reset. */
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void (*update)(struct fw_unit *unit);
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const struct ieee1394_device_id *id_table;
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};
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struct fw_packet;
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struct fw_request;
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typedef void (*fw_packet_callback_t)(struct fw_packet *packet,
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struct fw_card *card, int status);
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typedef void (*fw_transaction_callback_t)(struct fw_card *card, int rcode,
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void *data, size_t length,
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void *callback_data);
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/*
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* Important note: The callback must guarantee that either fw_send_response()
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* or kfree() is called on the @request.
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*/
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typedef void (*fw_address_callback_t)(struct fw_card *card,
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struct fw_request *request,
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int tcode, int destination, int source,
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int generation, int speed,
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unsigned long long offset,
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void *data, size_t length,
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void *callback_data);
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struct fw_packet {
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int speed;
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int generation;
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u32 header[4];
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size_t header_length;
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void *payload;
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size_t payload_length;
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dma_addr_t payload_bus;
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u32 timestamp;
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/*
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* This callback is called when the packet transmission has
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* completed; for successful transmission, the status code is
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* the ack received from the destination, otherwise it's a
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* negative errno: ENOMEM, ESTALE, ETIMEDOUT, ENODEV, EIO.
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* The callback can be called from tasklet context and thus
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* must never block.
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*/
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fw_packet_callback_t callback;
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int ack;
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struct list_head link;
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void *driver_data;
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};
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struct fw_transaction {
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int node_id; /* The generation is implied; it is always the current. */
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int tlabel;
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int timestamp;
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struct list_head link;
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struct fw_packet packet;
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/*
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* The data passed to the callback is valid only during the
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* callback.
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*/
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fw_transaction_callback_t callback;
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void *callback_data;
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};
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struct fw_address_handler {
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u64 offset;
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size_t length;
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fw_address_callback_t address_callback;
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void *callback_data;
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struct list_head link;
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};
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struct fw_address_region {
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u64 start;
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u64 end;
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};
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extern const struct fw_address_region fw_high_memory_region;
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int fw_core_add_address_handler(struct fw_address_handler *handler,
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const struct fw_address_region *region);
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void fw_core_remove_address_handler(struct fw_address_handler *handler);
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void fw_send_response(struct fw_card *card,
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struct fw_request *request, int rcode);
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void fw_send_request(struct fw_card *card, struct fw_transaction *t,
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int tcode, int destination_id, int generation, int speed,
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unsigned long long offset, void *payload, size_t length,
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fw_transaction_callback_t callback, void *callback_data);
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int fw_cancel_transaction(struct fw_card *card,
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struct fw_transaction *transaction);
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int fw_run_transaction(struct fw_card *card, int tcode, int destination_id,
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int generation, int speed, unsigned long long offset,
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void *payload, size_t length);
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#endif /* _LINUX_FIREWIRE_H */
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