1 files changed, 358 insertions, 0 deletions

diff --git a/include/linux/firewire.h b/include/linux/firewire.h
new file mode 100644
index 000000000000..e584b7215e8b
--- /dev/null
+++ b/include/linux/firewire.h
@@ -0,0 +1,358 @@
+#ifndef _LINUX_FIREWIRE_H
+#define _LINUX_FIREWIRE_H
+
+#include <linux/completion.h>
+#include <linux/device.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)
+
+static inline void fw_memcpy_from_be32(void *_dst, void *_src, size_t size)
+{
+        u32    *dst = _dst;
+        __be32 *src = _src;
+        int i;
+
+        for (i = 0; i < size / 4; i++)
+                dst[i] = be32_to_cpu(src[i]);
+}
+
+static inline void fw_memcpy_to_be32(void *_dst, void *_src, size_t size)
+{
+        fw_memcpy_from_be32(_dst, _src, size);
+}
+#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_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_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_NODE_CAPABILITIES   0x0c
+#define CSR_UNIT                0x11
+#define CSR_SPECIFIER_ID        0x12
+#define CSR_VERSION             0x13
+#define CSR_DEPENDENT_INFO      0x14
+#define CSR_MODEL               0x17
+#define CSR_INSTANCE            0x18
+#define CSR_DIRECTORY_ID        0x20
+
+struct fw_csr_iterator {
+        u32 *p;
+        u32 *end;
+};
+
+void fw_csr_iterator_init(struct fw_csr_iterator *ci, u32 *p);
+int fw_csr_iterator_next(struct fw_csr_iterator *ci, int *key, int *value);
+
+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;
+        struct timer_list flush_timer;
+        unsigned long reset_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;
+
+        /* Work struct for BM duties. */
+        struct delayed_work work;
+        int bm_retries;
+        int bm_generation;
+
+        bool broadcast_channel_allocated;
+        u32 broadcast_channel;
+        u32 topology_map[(CSR_TOPOLOGY_MAP_END - CSR_TOPOLOGY_MAP) / 4];
+};
+
+static inline struct fw_card *fw_card_get(struct fw_card *card)
+{
+        kref_get(&card->kref);
+
+        return card;
+}
+
+void fw_card_release(struct kref *kref);
+
+static inline void fw_card_put(struct fw_card *card)
+{
+        kref_put(&card->kref, fw_card_release);
+}
+
+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;
+
+        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;
+        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:  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, int speed,
+                                      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;
+        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_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);
+
+#endif /* _LINUX_FIREWIRE_H */