1 /* -*- c-basic-offset: 8 -*-
3 * fw-transaction.h - Header for IEEE1394 transaction logic
5 * Copyright (C) 2003-2006 Kristian Hoegsberg <krh@bitplanet.net>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software Foundation,
19 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 #ifndef __fw_transaction_h
23 #define __fw_transaction_h
25 #include <linux/device.h>
26 #include <linux/timer.h>
27 #include <linux/interrupt.h>
28 #include <linux/list.h>
31 #define TCODE_WRITE_QUADLET_REQUEST 0
32 #define TCODE_WRITE_BLOCK_REQUEST 1
33 #define TCODE_WRITE_RESPONSE 2
34 #define TCODE_READ_QUADLET_REQUEST 4
35 #define TCODE_READ_BLOCK_REQUEST 5
36 #define TCODE_READ_QUADLET_RESPONSE 6
37 #define TCODE_READ_BLOCK_RESPONSE 7
38 #define TCODE_CYCLE_START 8
39 #define TCODE_LOCK_REQUEST 9
40 #define TCODE_STREAM_DATA 10
41 #define TCODE_LOCK_RESPONSE 11
43 #define TCODE_IS_BLOCK_PACKET(tcode) (((tcode) & 1) != 0)
44 #define TCODE_IS_REQUEST(tcode) (((tcode) & 2) == 0)
45 #define TCODE_IS_RESPONSE(tcode) (((tcode) & 2) != 0)
46 #define TCODE_HAS_REQUEST_DATA(tcode) (((tcode) & 12) != 4)
47 #define TCODE_HAS_RESPONSE_DATA(tcode) (((tcode) & 12) != 0)
49 /* Juju specific tcodes */
50 #define TCODE_DEALLOCATE 0x10
51 #define TCODE_LOCK_MASK_SWAP 0x11
52 #define TCODE_LOCK_COMPARE_SWAP 0x12
53 #define TCODE_LOCK_FETCH_ADD 0x13
54 #define TCODE_LOCK_LITTLE_ADD 0x14
55 #define TCODE_LOCK_BOUNDED_ADD 0x15
56 #define TCODE_LOCK_WRAP_ADD 0x16
57 #define TCODE_LOCK_VENDOR_SPECIFIC 0x17
62 #define SCODE_BETA 0x3
64 #define EXTCODE_MASK_SWAP 0x1
65 #define EXTCODE_COMPARE_SWAP 0x2
66 #define EXTCODE_FETCH_ADD 0x3
67 #define EXTCODE_LITTLE_ADD 0x4
68 #define EXTCODE_BOUNDED_ADD 0x5
69 #define EXTCODE_WRAP_ADD 0x6
71 #define ACK_COMPLETE 0x1
72 #define ACK_PENDING 0x2
73 #define ACK_BUSY_X 0x4
74 #define ACK_BUSY_A 0x5
75 #define ACK_BUSY_B 0x6
76 #define ACK_DATA_ERROR 0xd
77 #define ACK_TYPE_ERROR 0xe
79 #define RCODE_COMPLETE 0x0
80 #define RCODE_CONFLICT_ERROR 0x4
81 #define RCODE_DATA_ERROR 0x5
82 #define RCODE_TYPE_ERROR 0x6
83 #define RCODE_ADDRESS_ERROR 0x7
85 /* Juju specific rcodes */
86 #define RCODE_SEND_ERROR 0x10
87 #define RCODE_CANCELLED 0x11
88 #define RCODE_BUSY 0x12
95 #define LOCAL_BUS 0xffc0
97 #define SELFID_PORT_CHILD 0x3
98 #define SELFID_PORT_PARENT 0x2
99 #define SELFID_PORT_NCONN 0x1
100 #define SELFID_PORT_NONE 0x0
102 #define PHY_PACKET_CONFIG 0x0
103 #define PHY_PACKET_LINK_ON 0x1
104 #define PHY_PACKET_SELF_ID 0x2
106 #define fw_notify(s, args...) printk(KERN_NOTICE KBUILD_MODNAME ": " s, ## args)
107 #define fw_error(s, args...) printk(KERN_ERR KBUILD_MODNAME ": " s, ## args)
108 #define fw_debug(s, args...) printk(KERN_DEBUG KBUILD_MODNAME ": " s, ## args)
111 fw_memcpy_from_be32(void *_dst, void *_src, size_t size)
117 for (i = 0; i < size / 4; i++)
118 dst[i] = cpu_to_be32(src[i]);
122 fw_memcpy_to_be32(void *_dst, void *_src, size_t size)
124 fw_memcpy_from_be32(_dst, _src, size);
132 struct fw_descriptor {
133 struct list_head link;
139 int fw_core_add_descriptor (struct fw_descriptor *desc);
140 void fw_core_remove_descriptor (struct fw_descriptor *desc);
142 typedef void (*fw_packet_callback_t) (struct fw_packet *packet,
143 struct fw_card *card, int status);
145 typedef void (*fw_transaction_callback_t)(struct fw_card *card, int rcode,
148 void *callback_data);
150 typedef void (*fw_address_callback_t)(struct fw_card *card,
151 struct fw_request *request,
152 int tcode, int destination, int source,
153 int generation, int speed,
154 unsigned long long offset,
155 void *data, size_t length,
156 void *callback_data);
158 typedef void (*fw_bus_reset_callback_t)(struct fw_card *handle,
159 int node_id, int generation,
162 void *callback_data);
168 size_t header_length;
170 size_t payload_length;
173 dma_addr_t payload_bus;
175 /* This callback is called when the packet transmission has
176 * completed; for successful transmission, the status code is
177 * the ack received from the destination, otherwise it's a
178 * negative errno: ENOMEM, ESTALE, ETIMEDOUT, ENODEV, EIO.
179 * The callback can be called from tasklet context and thus
182 fw_packet_callback_t callback;
184 struct list_head link;
187 struct fw_transaction {
188 int node_id; /* The generation is implied; it is always the current. */
191 struct list_head link;
193 struct fw_packet packet;
195 /* The data passed to the callback is valid only during the
197 fw_transaction_callback_t callback;
201 static inline struct fw_packet *
202 fw_packet(struct list_head *l)
204 return list_entry (l, struct fw_packet, link);
207 struct fw_address_handler {
210 fw_address_callback_t address_callback;
212 struct list_head link;
216 struct fw_address_region {
221 extern const struct fw_address_region fw_low_memory_region;
222 extern const struct fw_address_region fw_high_memory_region;
223 extern const struct fw_address_region fw_private_region;
224 extern const struct fw_address_region fw_csr_region;
225 extern const struct fw_address_region fw_unit_space_region;
227 int fw_core_add_address_handler(struct fw_address_handler *handler,
228 const struct fw_address_region *region);
229 void fw_core_remove_address_handler(struct fw_address_handler *handler);
230 void fw_send_response(struct fw_card *card,
231 struct fw_request *request, int rcode);
233 extern struct bus_type fw_bus_type;
236 const struct fw_card_driver *driver;
237 struct device *device;
241 /* This is the generation used for timestamping incoming requests. */
242 int request_generation;
243 int current_tlabel, tlabel_mask;
244 struct list_head transaction_list;
245 struct timer_list flush_timer;
247 unsigned long long guid;
250 int config_rom_generation;
252 /* We need to store up to 4 self ID for a maximum of 63 devices. */
256 spinlock_t lock; /* Take this lock when handling the lists in
258 struct fw_node *local_node;
259 struct fw_node *root_node;
260 struct fw_node *irm_node;
267 struct device card_device;
269 struct list_head link;
271 /* Work struct for IRM duties. */
272 struct delayed_work work;
276 struct fw_card *fw_card_get(struct fw_card *card);
277 void fw_card_put(struct fw_card *card);
279 /* The iso packet format allows for an immediate header/payload part
280 * stored in 'header' immediately after the packet info plus an
281 * indirect payload part that is pointer to by the 'payload' field.
282 * Applications can use one or the other or both to implement simple
283 * low-bandwidth streaming (e.g. audio) or more advanced
284 * scatter-gather streaming (e.g. assembling video frame automatically). */
286 struct fw_iso_packet {
287 u16 payload_length; /* Length of indirect payload. */
288 u32 interrupt : 1; /* Generate interrupt on this packet */
289 u32 skip : 1; /* Set to not send packet at all. */
292 u32 header_length : 8; /* Length of immediate header. */
296 #define FW_ISO_CONTEXT_TRANSMIT 0
297 #define FW_ISO_CONTEXT_RECEIVE 1
299 struct fw_iso_context;
301 typedef void (*fw_iso_callback_t) (struct fw_iso_context *context,
302 int status, u32 cycle, void *data);
304 struct fw_iso_context {
305 struct fw_card *card;
309 fw_iso_callback_t callback;
318 struct fw_iso_context *
319 fw_iso_context_create(struct fw_card *card, int type,
321 fw_iso_callback_t callback,
322 void *callback_data);
325 fw_iso_context_destroy(struct fw_iso_context *ctx);
328 fw_iso_context_start(struct fw_iso_context *ctx,
329 int channel, int speed, int cycle);
332 fw_iso_context_queue(struct fw_iso_context *ctx,
333 struct fw_iso_packet *packet, void *payload);
336 fw_iso_context_send(struct fw_iso_context *ctx,
337 int channel, int speed, int cycle);
339 struct fw_card_driver {
342 /* Enable the given card with the given initial config rom.
343 * This function is expected to activate the card, and either
344 * enable the PHY or set the link_on bit and initiate a bus
346 int (*enable) (struct fw_card *card, u32 *config_rom, size_t length);
348 int (*update_phy_reg) (struct fw_card *card, int address,
349 int clear_bits, int set_bits);
351 /* Update the config rom for an enabled card. This function
352 * should change the config rom that is presented on the bus
353 * an initiate a bus reset. */
354 int (*set_config_rom) (struct fw_card *card,
355 u32 *config_rom, size_t length);
357 void (*send_request) (struct fw_card *card, struct fw_packet *packet);
358 void (*send_response) (struct fw_card *card, struct fw_packet *packet);
360 /* Allow the specified node ID to do direct DMA out and in of
361 * host memory. The card will disable this for all node when
362 * a bus reset happens, so driver need to reenable this after
363 * bus reset. Returns 0 on success, -ENODEV if the card
364 * doesn't support this, -ESTALE if the generation doesn't
366 int (*enable_phys_dma) (struct fw_card *card,
367 int node_id, int generation);
369 struct fw_iso_context *
370 (*allocate_iso_context)(struct fw_card *card, int type);
371 void (*free_iso_context)(struct fw_iso_context *ctx);
373 int (*send_iso)(struct fw_iso_context *ctx, s32 cycle);
375 int (*queue_iso)(struct fw_iso_context *ctx,
376 struct fw_iso_packet *packet, void *payload);
380 fw_core_initiate_bus_reset(struct fw_card *card, int short_reset);
383 fw_send_request(struct fw_card *card, struct fw_transaction *t,
384 int tcode, int node_id, int generation, int speed,
385 unsigned long long offset,
386 void *data, size_t length,
387 fw_transaction_callback_t callback, void *callback_data);
389 void fw_flush_transactions(struct fw_card *card);
391 void fw_send_phy_config(struct fw_card *card,
392 int node_id, int generation, int gap_count);
394 /* Called by the topology code to inform the device code of node
395 * activity; found, lost, or updated nodes */
397 fw_node_event(struct fw_card *card, struct fw_node *node, int event);
399 /* API used by card level drivers */
401 /* Do we need phy speed here also? If we add more args, maybe we
402 should go back to struct fw_card_info. */
404 fw_card_initialize(struct fw_card *card, const struct fw_card_driver *driver,
405 struct device *device);
407 fw_card_add(struct fw_card *card,
408 u32 max_receive, u32 link_speed, u64 guid);
411 fw_core_remove_card(struct fw_card *card);
414 fw_core_handle_bus_reset(struct fw_card *card,
415 int node_id, int generation,
416 int self_id_count, u32 *self_ids);
418 fw_core_handle_request(struct fw_card *card, struct fw_packet *request);
421 fw_core_handle_response(struct fw_card *card, struct fw_packet *packet);
423 #endif /* __fw_transaction_h */