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Diffstat (limited to 'drivers/firewire/fw-transaction.h')
| -rw-r--r-- | drivers/firewire/fw-transaction.h | 422 |
1 files changed, 422 insertions, 0 deletions
diff --git a/drivers/firewire/fw-transaction.h b/drivers/firewire/fw-transaction.h new file mode 100644 index 00000000000..149ef1652ac --- /dev/null +++ b/drivers/firewire/fw-transaction.h @@ -0,0 +1,422 @@ +/* -*- c-basic-offset: 8 -*- + * + * fw-transaction.h - Header for IEEE1394 transaction logic + * + * Copyright (C) 2003-2006 Kristian Hoegsberg <krh@bitplanet.net> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#ifndef __fw_core_h +#define __fw_core_h + +#include <linux/device.h> +#include <linux/timer.h> +#include <linux/interrupt.h> +#include <linux/list.h> +#include <linux/fs.h> + +#define TCODE_WRITE_QUADLET_REQUEST 0 +#define TCODE_WRITE_BLOCK_REQUEST 1 +#define TCODE_WRITE_RESPONSE 2 +#define TCODE_READ_QUADLET_REQUEST 4 +#define TCODE_READ_BLOCK_REQUEST 5 +#define TCODE_READ_QUADLET_RESPONSE 6 +#define TCODE_READ_BLOCK_RESPONSE 7 +#define TCODE_CYCLE_START 8 +#define TCODE_LOCK_REQUEST 9 +#define TCODE_STREAM_DATA 10 +#define TCODE_LOCK_RESPONSE 11 + +#define TCODE_IS_BLOCK_PACKET(tcode) (((tcode) & 1) != 0) +#define TCODE_IS_REQUEST(tcode) (((tcode) & 2) == 0) +#define TCODE_IS_RESPONSE(tcode) (((tcode) & 2) != 0) +#define TCODE_HAS_REQUEST_DATA(tcode) (((tcode) & 12) != 4) +#define TCODE_HAS_RESPONSE_DATA(tcode) (((tcode) & 12) != 0) + +/* Juju specific tcodes */ +#define TCODE_DEALLOCATE 0x10 +#define TCODE_LOCK_MASK_SWAP 0x11 +#define TCODE_LOCK_COMPARE_SWAP 0x12 +#define TCODE_LOCK_FETCH_ADD 0x13 +#define TCODE_LOCK_LITTLE_ADD 0x14 +#define TCODE_LOCK_BOUNDED_ADD 0x15 +#define TCODE_LOCK_WRAP_ADD 0x16 +#define TCODE_LOCK_VENDOR_SPECIFIC 0x17 + +#define SCODE_100 0x0 +#define SCODE_200 0x1 +#define SCODE_400 0x2 +#define SCODE_BETA 0x3 + +#define EXTCODE_MASK_SWAP 0x1 +#define EXTCODE_COMPARE_SWAP 0x2 +#define EXTCODE_FETCH_ADD 0x3 +#define EXTCODE_LITTLE_ADD 0x4 +#define EXTCODE_BOUNDED_ADD 0x5 +#define EXTCODE_WRAP_ADD 0x6 + +#define ACK_COMPLETE 0x1 +#define ACK_PENDING 0x2 +#define ACK_BUSY_X 0x4 +#define ACK_BUSY_A 0x5 +#define ACK_BUSY_B 0x6 +#define ACK_DATA_ERROR 0xd +#define ACK_TYPE_ERROR 0xe + +#define RCODE_COMPLETE 0x0 +#define RCODE_CONFLICT_ERROR 0x4 +#define RCODE_DATA_ERROR 0x5 +#define RCODE_TYPE_ERROR 0x6 +#define RCODE_ADDRESS_ERROR 0x7 + +/* Juju specific rcodes */ +#define RCODE_SEND_ERROR 0x10 +#define RCODE_CANCELLED 0x11 +#define RCODE_BUSY 0x12 + +#define RETRY_1 0x00 +#define RETRY_X 0x01 +#define RETRY_A 0x02 +#define RETRY_B 0x03 + +#define LOCAL_BUS 0xffc0 + +#define SELFID_PORT_CHILD 0x3 +#define SELFID_PORT_PARENT 0x2 +#define SELFID_PORT_NCONN 0x1 +#define SELFID_PORT_NONE 0x0 + +#define PHY_PACKET_CONFIG 0x0 +#define PHY_PACKET_LINK_ON 0x1 +#define PHY_PACKET_SELF_ID 0x2 + +#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 fw_debug(s, args...) printk(KERN_DEBUG KBUILD_MODNAME ": " s, ## args) + +static inline void +fw_memcpy_from_be32(void *_dst, void *_src, size_t size) +{ + u32 *dst = _dst; + u32 *src = _src; + int i; + + for (i = 0; i < size / 4; i++) + dst[i] = cpu_to_be32(src[i]); +} + +static inline void +fw_memcpy_to_be32(void *_dst, void *_src, size_t size) +{ + fw_memcpy_from_be32(_dst, _src, size); +} + +struct fw_card; +struct fw_packet; +struct fw_node; +struct fw_request; + +struct fw_descriptor { + struct list_head link; + size_t length; + u32 key; + u32 *data; +}; + +int fw_core_add_descriptor (struct fw_descriptor *desc); +void fw_core_remove_descriptor (struct fw_descriptor *desc); + +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); + +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); + +typedef void (*fw_bus_reset_callback_t)(struct fw_card *handle, + int node_id, int generation, + u32 *self_ids, + int self_id_count, + void *callback_data); + +struct fw_packet { + int speed; + int generation; + u32 header[4]; + size_t header_length; + void *payload; + size_t payload_length; + u32 timestamp; + + dma_addr_t payload_bus; + + /* 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 status; + struct list_head link; +}; + +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; +}; + +extern inline struct fw_packet * +fw_packet(struct list_head *l) +{ + return list_entry (l, struct fw_packet, link); +} + +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 struct fw_address_region fw_low_memory_region; +extern struct fw_address_region fw_high_memory_region; +extern struct fw_address_region fw_private_region; +extern struct fw_address_region fw_csr_region; +extern struct fw_address_region fw_unit_space_region; + +int fw_core_add_address_handler(struct fw_address_handler *handler, + 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); + +extern struct bus_type fw_bus_type; + +struct fw_card { + struct fw_card_driver *driver; + struct device *device; + + int node_id; + int generation; + /* This is the generation used for timestamping incoming requests. */ + int request_generation; + int current_tlabel, tlabel_mask; + struct list_head transaction_list; + struct timer_list flush_timer; + + unsigned long long guid; + int max_receive; + int link_speed; + int config_rom_generation; + + /* We need to store up to 4 self ID for a maximum of 63 devices. */ + int self_id_count; + u32 self_ids[252]; + + 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; + int color; + + int index; + + struct device card_device; + + struct list_head link; +}; + +struct fw_card *fw_card_get(struct fw_card *card); +void fw_card_put(struct fw_card *card); + +/* 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 + +struct fw_iso_context; + +typedef void (*fw_iso_callback_t) (struct fw_iso_context *context, + int status, u32 cycle, void *data); + +struct fw_iso_context { + struct fw_card *card; + int type; + int channel; + int speed; + fw_iso_callback_t callback; + void *callback_data; + + void *buffer; + size_t buffer_size; + dma_addr_t *pages; + int page_count; +}; + +struct fw_iso_context * +fw_iso_context_create(struct fw_card *card, int type, + size_t buffer_size, + fw_iso_callback_t callback, + void *callback_data); + +void +fw_iso_context_destroy(struct fw_iso_context *ctx); + +void +fw_iso_context_start(struct fw_iso_context *ctx, + int channel, int speed, int cycle); + +int +fw_iso_context_queue(struct fw_iso_context *ctx, + struct fw_iso_packet *packet, void *payload); + +int +fw_iso_context_send(struct fw_iso_context *ctx, + int channel, int speed, int cycle); + +struct fw_card_driver { + const char *name; + + /* Enable the given card with the given initial config rom. + * This function is expected to activate the card, and either + * enable the PHY or set the link_on bit and initiate a bus + * reset. */ + int (*enable) (struct fw_card *card, u32 *config_rom, size_t length); + + int (*update_phy_reg) (struct fw_card *card, int address, + int clear_bits, int set_bits); + + /* Update the config rom for an enabled card. This function + * should change the config rom that is presented on the bus + * an initiate a bus reset. */ + int (*set_config_rom) (struct fw_card *card, + u32 *config_rom, size_t length); + + void (*send_request) (struct fw_card *card, struct fw_packet *packet); + void (*send_response) (struct fw_card *card, struct fw_packet *packet); + + /* Allow the specified node ID to do direct DMA out and in of + * host memory. The card will disable this for all node when + * a bus reset happens, so driver need to reenable this after + * bus reset. Returns 0 on success, -ENODEV if the card + * doesn't support this, -ESTALE if the generation doesn't + * match. */ + int (*enable_phys_dma) (struct fw_card *card, + int node_id, int generation); + + struct fw_iso_context * + (*allocate_iso_context)(struct fw_card *card, int type); + void (*free_iso_context)(struct fw_iso_context *ctx); + + int (*send_iso)(struct fw_iso_context *ctx, s32 cycle); + + int (*queue_iso)(struct fw_iso_context *ctx, + struct fw_iso_packet *packet, void *payload); +}; + +int +fw_core_initiate_bus_reset(struct fw_card *card, int short_reset); + +void +fw_send_request(struct fw_card *card, struct fw_transaction *t, + int tcode, int node_id, int generation, int speed, + unsigned long long offset, + void *data, size_t length, + fw_transaction_callback_t callback, void *callback_data); + +void fw_flush_transactions(struct fw_card *card); + +void +fw_send_force_root(struct fw_card *card, int node_id, int generation); + +/* Called by the topology code to inform the device code of node + * activity; found, lost, or updated nodes */ +void +fw_node_event(struct fw_card *card, struct fw_node *node, int event); + +/* API used by card level drivers */ + +/* Do we need phy speed here also? If we add more args, maybe we + should go back to struct fw_card_info. */ +void +fw_card_initialize(struct fw_card *card, struct fw_card_driver *driver, + struct device *device); +int +fw_card_add(struct fw_card *card, + u32 max_receive, u32 link_speed, u64 guid); + +void +fw_core_remove_card(struct fw_card *card); + +void +fw_core_handle_bus_reset(struct fw_card *card, + int node_id, int generation, + int self_id_count, u32 *self_ids); +void +fw_core_handle_request(struct fw_card *card, + int speed, int ack, int timestamp, + int generation, + u32 length, u32 *payload); +void +fw_core_handle_response(struct fw_card *card, + int speed, int ack, int timestamp, + u32 length, u32 *payload); + + +#endif /* __fw_core_h */ |