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3038e353 KH |
1 | /* -*- c-basic-offset: 8 -*- |
2 | * | |
3 | * fw-transaction.h - Header for IEEE1394 transaction logic | |
4 | * | |
5 | * Copyright (C) 2003-2006 Kristian Hoegsberg <krh@bitplanet.net> | |
6 | * | |
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. | |
11 | * | |
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. | |
16 | * | |
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. | |
20 | */ | |
21 | ||
687198bb SR |
22 | #ifndef __fw_transaction_h |
23 | #define __fw_transaction_h | |
3038e353 KH |
24 | |
25 | #include <linux/device.h> | |
26 | #include <linux/timer.h> | |
27 | #include <linux/interrupt.h> | |
28 | #include <linux/list.h> | |
29 | #include <linux/fs.h> | |
30 | ||
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 | |
5e20c282 SR |
39 | #define TCODE_LOCK_REQUEST 9 |
40 | #define TCODE_STREAM_DATA 10 | |
41 | #define TCODE_LOCK_RESPONSE 11 | |
3038e353 | 42 | |
93c4cceb | 43 | #define TCODE_IS_READ_REQUEST(tcode) (((tcode) & ~1) == 4) |
3038e353 KH |
44 | #define TCODE_IS_BLOCK_PACKET(tcode) (((tcode) & 1) != 0) |
45 | #define TCODE_IS_REQUEST(tcode) (((tcode) & 2) == 0) | |
46 | #define TCODE_IS_RESPONSE(tcode) (((tcode) & 2) != 0) | |
47 | #define TCODE_HAS_REQUEST_DATA(tcode) (((tcode) & 12) != 4) | |
48 | #define TCODE_HAS_RESPONSE_DATA(tcode) (((tcode) & 12) != 0) | |
49 | ||
50 | /* Juju specific tcodes */ | |
51 | #define TCODE_DEALLOCATE 0x10 | |
52 | #define TCODE_LOCK_MASK_SWAP 0x11 | |
53 | #define TCODE_LOCK_COMPARE_SWAP 0x12 | |
54 | #define TCODE_LOCK_FETCH_ADD 0x13 | |
55 | #define TCODE_LOCK_LITTLE_ADD 0x14 | |
56 | #define TCODE_LOCK_BOUNDED_ADD 0x15 | |
57 | #define TCODE_LOCK_WRAP_ADD 0x16 | |
58 | #define TCODE_LOCK_VENDOR_SPECIFIC 0x17 | |
59 | ||
60 | #define SCODE_100 0x0 | |
61 | #define SCODE_200 0x1 | |
62 | #define SCODE_400 0x2 | |
63 | #define SCODE_BETA 0x3 | |
64 | ||
5e20c282 SR |
65 | #define EXTCODE_MASK_SWAP 0x1 |
66 | #define EXTCODE_COMPARE_SWAP 0x2 | |
67 | #define EXTCODE_FETCH_ADD 0x3 | |
68 | #define EXTCODE_LITTLE_ADD 0x4 | |
69 | #define EXTCODE_BOUNDED_ADD 0x5 | |
70 | #define EXTCODE_WRAP_ADD 0x6 | |
71 | ||
72 | #define ACK_COMPLETE 0x1 | |
73 | #define ACK_PENDING 0x2 | |
74 | #define ACK_BUSY_X 0x4 | |
75 | #define ACK_BUSY_A 0x5 | |
76 | #define ACK_BUSY_B 0x6 | |
77 | #define ACK_DATA_ERROR 0xd | |
78 | #define ACK_TYPE_ERROR 0xe | |
79 | ||
80 | #define RCODE_COMPLETE 0x0 | |
81 | #define RCODE_CONFLICT_ERROR 0x4 | |
82 | #define RCODE_DATA_ERROR 0x5 | |
83 | #define RCODE_TYPE_ERROR 0x6 | |
84 | #define RCODE_ADDRESS_ERROR 0x7 | |
3038e353 KH |
85 | |
86 | /* Juju specific rcodes */ | |
87 | #define RCODE_SEND_ERROR 0x10 | |
88 | #define RCODE_CANCELLED 0x11 | |
89 | #define RCODE_BUSY 0x12 | |
e5f49c3b KH |
90 | #define RCODE_GENERATION 0x13 |
91 | #define RCODE_NO_ACK 0x14 | |
3038e353 KH |
92 | |
93 | #define RETRY_1 0x00 | |
94 | #define RETRY_X 0x01 | |
95 | #define RETRY_A 0x02 | |
96 | #define RETRY_B 0x03 | |
97 | ||
98 | #define LOCAL_BUS 0xffc0 | |
99 | ||
5e20c282 SR |
100 | #define SELFID_PORT_CHILD 0x3 |
101 | #define SELFID_PORT_PARENT 0x2 | |
102 | #define SELFID_PORT_NCONN 0x1 | |
103 | #define SELFID_PORT_NONE 0x0 | |
3038e353 KH |
104 | |
105 | #define PHY_PACKET_CONFIG 0x0 | |
106 | #define PHY_PACKET_LINK_ON 0x1 | |
107 | #define PHY_PACKET_SELF_ID 0x2 | |
108 | ||
93c4cceb KH |
109 | #define CSR_REGISTER_BASE 0xfffff0000000ULL |
110 | ||
111 | /* register offsets relative to CSR_REGISTER_BASE */ | |
112 | #define CSR_STATE_CLEAR 0x0 | |
113 | #define CSR_STATE_SET 0x4 | |
114 | #define CSR_NODE_IDS 0x8 | |
115 | #define CSR_RESET_START 0xc | |
116 | #define CSR_SPLIT_TIMEOUT_HI 0x18 | |
117 | #define CSR_SPLIT_TIMEOUT_LO 0x1c | |
118 | #define CSR_CYCLE_TIME 0x200 | |
119 | #define CSR_BUS_TIME 0x204 | |
120 | #define CSR_BUSY_TIMEOUT 0x210 | |
121 | #define CSR_BUS_MANAGER_ID 0x21c | |
122 | #define CSR_BANDWIDTH_AVAILABLE 0x220 | |
123 | #define CSR_CHANNELS_AVAILABLE 0x224 | |
124 | #define CSR_CHANNELS_AVAILABLE_HI 0x224 | |
125 | #define CSR_CHANNELS_AVAILABLE_LO 0x228 | |
126 | #define CSR_BROADCAST_CHANNEL 0x234 | |
127 | #define CSR_CONFIG_ROM 0x400 | |
128 | #define CSR_CONFIG_ROM_END 0x800 | |
129 | #define CSR_FCP_COMMAND 0xB00 | |
130 | #define CSR_FCP_RESPONSE 0xD00 | |
131 | #define CSR_FCP_END 0xF00 | |
132 | #define CSR_TOPOLOGY_MAP 0x1000 | |
133 | #define CSR_TOPOLOGY_MAP_END 0x1400 | |
134 | #define CSR_SPEED_MAP 0x2000 | |
135 | #define CSR_SPEED_MAP_END 0x3000 | |
136 | ||
3038e353 KH |
137 | #define fw_notify(s, args...) printk(KERN_NOTICE KBUILD_MODNAME ": " s, ## args) |
138 | #define fw_error(s, args...) printk(KERN_ERR KBUILD_MODNAME ": " s, ## args) | |
139 | #define fw_debug(s, args...) printk(KERN_DEBUG KBUILD_MODNAME ": " s, ## args) | |
140 | ||
141 | static inline void | |
142 | fw_memcpy_from_be32(void *_dst, void *_src, size_t size) | |
143 | { | |
144 | u32 *dst = _dst; | |
145 | u32 *src = _src; | |
146 | int i; | |
147 | ||
148 | for (i = 0; i < size / 4; i++) | |
149 | dst[i] = cpu_to_be32(src[i]); | |
150 | } | |
151 | ||
152 | static inline void | |
153 | fw_memcpy_to_be32(void *_dst, void *_src, size_t size) | |
154 | { | |
155 | fw_memcpy_from_be32(_dst, _src, size); | |
156 | } | |
157 | ||
158 | struct fw_card; | |
159 | struct fw_packet; | |
160 | struct fw_node; | |
161 | struct fw_request; | |
162 | ||
163 | struct fw_descriptor { | |
164 | struct list_head link; | |
165 | size_t length; | |
166 | u32 key; | |
21ebcd12 | 167 | const u32 *data; |
3038e353 KH |
168 | }; |
169 | ||
170 | int fw_core_add_descriptor (struct fw_descriptor *desc); | |
171 | void fw_core_remove_descriptor (struct fw_descriptor *desc); | |
172 | ||
173 | typedef void (*fw_packet_callback_t) (struct fw_packet *packet, | |
174 | struct fw_card *card, int status); | |
175 | ||
176 | typedef void (*fw_transaction_callback_t)(struct fw_card *card, int rcode, | |
177 | void *data, | |
178 | size_t length, | |
179 | void *callback_data); | |
180 | ||
181 | typedef void (*fw_address_callback_t)(struct fw_card *card, | |
182 | struct fw_request *request, | |
183 | int tcode, int destination, int source, | |
184 | int generation, int speed, | |
185 | unsigned long long offset, | |
186 | void *data, size_t length, | |
187 | void *callback_data); | |
188 | ||
189 | typedef void (*fw_bus_reset_callback_t)(struct fw_card *handle, | |
190 | int node_id, int generation, | |
191 | u32 *self_ids, | |
192 | int self_id_count, | |
193 | void *callback_data); | |
194 | ||
195 | struct fw_packet { | |
5e20c282 SR |
196 | int speed; |
197 | int generation; | |
198 | u32 header[4]; | |
199 | size_t header_length; | |
200 | void *payload; | |
201 | size_t payload_length; | |
202 | u32 timestamp; | |
203 | ||
204 | dma_addr_t payload_bus; | |
205 | ||
206 | /* This callback is called when the packet transmission has | |
207 | * completed; for successful transmission, the status code is | |
208 | * the ack received from the destination, otherwise it's a | |
209 | * negative errno: ENOMEM, ESTALE, ETIMEDOUT, ENODEV, EIO. | |
210 | * The callback can be called from tasklet context and thus | |
211 | * must never block. | |
212 | */ | |
213 | fw_packet_callback_t callback; | |
2639a6fb | 214 | int ack; |
5e20c282 | 215 | struct list_head link; |
3038e353 KH |
216 | }; |
217 | ||
218 | struct fw_transaction { | |
5e20c282 SR |
219 | int node_id; /* The generation is implied; it is always the current. */ |
220 | int tlabel; | |
221 | int timestamp; | |
222 | struct list_head link; | |
3038e353 | 223 | |
5e20c282 | 224 | struct fw_packet packet; |
3038e353 KH |
225 | |
226 | /* The data passed to the callback is valid only during the | |
227 | * callback. */ | |
5e20c282 SR |
228 | fw_transaction_callback_t callback; |
229 | void *callback_data; | |
3038e353 KH |
230 | }; |
231 | ||
95688e97 | 232 | static inline struct fw_packet * |
3038e353 KH |
233 | fw_packet(struct list_head *l) |
234 | { | |
5e20c282 | 235 | return list_entry (l, struct fw_packet, link); |
3038e353 KH |
236 | } |
237 | ||
238 | struct fw_address_handler { | |
5e20c282 SR |
239 | u64 offset; |
240 | size_t length; | |
241 | fw_address_callback_t address_callback; | |
242 | void *callback_data; | |
243 | struct list_head link; | |
3038e353 KH |
244 | }; |
245 | ||
246 | ||
247 | struct fw_address_region { | |
248 | u64 start; | |
249 | u64 end; | |
250 | }; | |
251 | ||
21ebcd12 SR |
252 | extern const struct fw_address_region fw_low_memory_region; |
253 | extern const struct fw_address_region fw_high_memory_region; | |
254 | extern const struct fw_address_region fw_private_region; | |
255 | extern const struct fw_address_region fw_csr_region; | |
256 | extern const struct fw_address_region fw_unit_space_region; | |
3038e353 KH |
257 | |
258 | int fw_core_add_address_handler(struct fw_address_handler *handler, | |
21ebcd12 | 259 | const struct fw_address_region *region); |
3038e353 | 260 | void fw_core_remove_address_handler(struct fw_address_handler *handler); |
93c4cceb KH |
261 | void fw_fill_response(struct fw_packet *response, u32 *request_header, |
262 | int rcode, void *payload, size_t length); | |
3038e353 KH |
263 | void fw_send_response(struct fw_card *card, |
264 | struct fw_request *request, int rcode); | |
265 | ||
266 | extern struct bus_type fw_bus_type; | |
267 | ||
268 | struct fw_card { | |
21ebcd12 | 269 | const struct fw_card_driver *driver; |
3038e353 KH |
270 | struct device *device; |
271 | ||
5e20c282 SR |
272 | int node_id; |
273 | int generation; | |
274 | /* This is the generation used for timestamping incoming requests. */ | |
275 | int request_generation; | |
276 | int current_tlabel, tlabel_mask; | |
277 | struct list_head transaction_list; | |
3038e353 KH |
278 | struct timer_list flush_timer; |
279 | ||
5e20c282 | 280 | unsigned long long guid; |
3038e353 KH |
281 | int max_receive; |
282 | int link_speed; | |
283 | int config_rom_generation; | |
284 | ||
5e20c282 SR |
285 | /* We need to store up to 4 self ID for a maximum of 63 devices. */ |
286 | int self_id_count; | |
287 | u32 self_ids[252]; | |
3038e353 KH |
288 | |
289 | spinlock_t lock; /* Take this lock when handling the lists in | |
290 | * this struct. */ | |
291 | struct fw_node *local_node; | |
292 | struct fw_node *root_node; | |
293 | struct fw_node *irm_node; | |
294 | int color; | |
83db801c KH |
295 | int gap_count; |
296 | int topology_type; | |
3038e353 KH |
297 | |
298 | int index; | |
299 | ||
300 | struct device card_device; | |
301 | ||
302 | struct list_head link; | |
19a15b93 KH |
303 | |
304 | /* Work struct for IRM duties. */ | |
305 | struct delayed_work work; | |
306 | int irm_retries; | |
3038e353 KH |
307 | }; |
308 | ||
309 | struct fw_card *fw_card_get(struct fw_card *card); | |
310 | void fw_card_put(struct fw_card *card); | |
311 | ||
312 | /* The iso packet format allows for an immediate header/payload part | |
313 | * stored in 'header' immediately after the packet info plus an | |
314 | * indirect payload part that is pointer to by the 'payload' field. | |
315 | * Applications can use one or the other or both to implement simple | |
316 | * low-bandwidth streaming (e.g. audio) or more advanced | |
317 | * scatter-gather streaming (e.g. assembling video frame automatically). */ | |
318 | ||
319 | struct fw_iso_packet { | |
5e20c282 | 320 | u16 payload_length; /* Length of indirect payload. */ |
3038e353 KH |
321 | u32 interrupt : 1; /* Generate interrupt on this packet */ |
322 | u32 skip : 1; /* Set to not send packet at all. */ | |
323 | u32 tag : 2; | |
324 | u32 sy : 4; | |
325 | u32 header_length : 8; /* Length of immediate header. */ | |
5e20c282 | 326 | u32 header[0]; |
3038e353 KH |
327 | }; |
328 | ||
329 | #define FW_ISO_CONTEXT_TRANSMIT 0 | |
330 | #define FW_ISO_CONTEXT_RECEIVE 1 | |
331 | ||
332 | struct fw_iso_context; | |
333 | ||
334 | typedef void (*fw_iso_callback_t) (struct fw_iso_context *context, | |
335 | int status, u32 cycle, void *data); | |
336 | ||
337 | struct fw_iso_context { | |
338 | struct fw_card *card; | |
339 | int type; | |
340 | int channel; | |
341 | int speed; | |
342 | fw_iso_callback_t callback; | |
343 | void *callback_data; | |
344 | ||
345 | void *buffer; | |
346 | size_t buffer_size; | |
347 | dma_addr_t *pages; | |
348 | int page_count; | |
349 | }; | |
350 | ||
351 | struct fw_iso_context * | |
352 | fw_iso_context_create(struct fw_card *card, int type, | |
353 | size_t buffer_size, | |
354 | fw_iso_callback_t callback, | |
355 | void *callback_data); | |
356 | ||
357 | void | |
358 | fw_iso_context_destroy(struct fw_iso_context *ctx); | |
359 | ||
360 | void | |
361 | fw_iso_context_start(struct fw_iso_context *ctx, | |
362 | int channel, int speed, int cycle); | |
363 | ||
364 | int | |
365 | fw_iso_context_queue(struct fw_iso_context *ctx, | |
366 | struct fw_iso_packet *packet, void *payload); | |
367 | ||
368 | int | |
369 | fw_iso_context_send(struct fw_iso_context *ctx, | |
370 | int channel, int speed, int cycle); | |
371 | ||
372 | struct fw_card_driver { | |
5e20c282 | 373 | const char *name; |
3038e353 | 374 | |
5e20c282 SR |
375 | /* Enable the given card with the given initial config rom. |
376 | * This function is expected to activate the card, and either | |
377 | * enable the PHY or set the link_on bit and initiate a bus | |
378 | * reset. */ | |
379 | int (*enable) (struct fw_card *card, u32 *config_rom, size_t length); | |
3038e353 | 380 | |
5e20c282 SR |
381 | int (*update_phy_reg) (struct fw_card *card, int address, |
382 | int clear_bits, int set_bits); | |
3038e353 | 383 | |
5e20c282 SR |
384 | /* Update the config rom for an enabled card. This function |
385 | * should change the config rom that is presented on the bus | |
386 | * an initiate a bus reset. */ | |
387 | int (*set_config_rom) (struct fw_card *card, | |
3038e353 KH |
388 | u32 *config_rom, size_t length); |
389 | ||
5e20c282 SR |
390 | void (*send_request) (struct fw_card *card, struct fw_packet *packet); |
391 | void (*send_response) (struct fw_card *card, struct fw_packet *packet); | |
3038e353 KH |
392 | |
393 | /* Allow the specified node ID to do direct DMA out and in of | |
394 | * host memory. The card will disable this for all node when | |
395 | * a bus reset happens, so driver need to reenable this after | |
396 | * bus reset. Returns 0 on success, -ENODEV if the card | |
397 | * doesn't support this, -ESTALE if the generation doesn't | |
398 | * match. */ | |
399 | int (*enable_phys_dma) (struct fw_card *card, | |
400 | int node_id, int generation); | |
401 | ||
402 | struct fw_iso_context * | |
403 | (*allocate_iso_context)(struct fw_card *card, int type); | |
404 | void (*free_iso_context)(struct fw_iso_context *ctx); | |
405 | ||
406 | int (*send_iso)(struct fw_iso_context *ctx, s32 cycle); | |
407 | ||
408 | int (*queue_iso)(struct fw_iso_context *ctx, | |
409 | struct fw_iso_packet *packet, void *payload); | |
410 | }; | |
411 | ||
412 | int | |
413 | fw_core_initiate_bus_reset(struct fw_card *card, int short_reset); | |
414 | ||
415 | void | |
416 | fw_send_request(struct fw_card *card, struct fw_transaction *t, | |
417 | int tcode, int node_id, int generation, int speed, | |
418 | unsigned long long offset, | |
419 | void *data, size_t length, | |
420 | fw_transaction_callback_t callback, void *callback_data); | |
421 | ||
422 | void fw_flush_transactions(struct fw_card *card); | |
423 | ||
83db801c KH |
424 | void fw_send_phy_config(struct fw_card *card, |
425 | int node_id, int generation, int gap_count); | |
3038e353 KH |
426 | |
427 | /* Called by the topology code to inform the device code of node | |
428 | * activity; found, lost, or updated nodes */ | |
429 | void | |
430 | fw_node_event(struct fw_card *card, struct fw_node *node, int event); | |
431 | ||
432 | /* API used by card level drivers */ | |
433 | ||
434 | /* Do we need phy speed here also? If we add more args, maybe we | |
435 | should go back to struct fw_card_info. */ | |
436 | void | |
21ebcd12 | 437 | fw_card_initialize(struct fw_card *card, const struct fw_card_driver *driver, |
3038e353 KH |
438 | struct device *device); |
439 | int | |
440 | fw_card_add(struct fw_card *card, | |
441 | u32 max_receive, u32 link_speed, u64 guid); | |
442 | ||
443 | void | |
444 | fw_core_remove_card(struct fw_card *card); | |
445 | ||
446 | void | |
447 | fw_core_handle_bus_reset(struct fw_card *card, | |
448 | int node_id, int generation, | |
449 | int self_id_count, u32 *self_ids); | |
450 | void | |
2639a6fb | 451 | fw_core_handle_request(struct fw_card *card, struct fw_packet *request); |
3038e353 | 452 | |
2639a6fb KH |
453 | void |
454 | fw_core_handle_response(struct fw_card *card, struct fw_packet *packet); | |
3038e353 | 455 | |
687198bb | 456 | #endif /* __fw_transaction_h */ |