Commit | Line | Data |
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c781c06d | 1 | /* |
3038e353 KH |
2 | * Copyright (C) 2003-2006 Kristian Hoegsberg <krh@bitplanet.net> |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software Foundation, | |
16 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
17 | */ | |
18 | ||
687198bb SR |
19 | #ifndef __fw_transaction_h |
20 | #define __fw_transaction_h | |
3038e353 KH |
21 | |
22 | #include <linux/device.h> | |
23 | #include <linux/timer.h> | |
24 | #include <linux/interrupt.h> | |
25 | #include <linux/list.h> | |
26 | #include <linux/fs.h> | |
9aad8125 | 27 | #include <linux/dma-mapping.h> |
4c5a443e | 28 | #include <linux/firewire-constants.h> |
855c603d | 29 | #include <asm/atomic.h> |
3038e353 | 30 | |
93c4cceb | 31 | #define TCODE_IS_READ_REQUEST(tcode) (((tcode) & ~1) == 4) |
3038e353 KH |
32 | #define TCODE_IS_BLOCK_PACKET(tcode) (((tcode) & 1) != 0) |
33 | #define TCODE_IS_REQUEST(tcode) (((tcode) & 2) == 0) | |
34 | #define TCODE_IS_RESPONSE(tcode) (((tcode) & 2) != 0) | |
35 | #define TCODE_HAS_REQUEST_DATA(tcode) (((tcode) & 12) != 4) | |
36 | #define TCODE_HAS_RESPONSE_DATA(tcode) (((tcode) & 12) != 0) | |
37 | ||
3038e353 KH |
38 | #define LOCAL_BUS 0xffc0 |
39 | ||
5e20c282 SR |
40 | #define SELFID_PORT_CHILD 0x3 |
41 | #define SELFID_PORT_PARENT 0x2 | |
42 | #define SELFID_PORT_NCONN 0x1 | |
43 | #define SELFID_PORT_NONE 0x0 | |
3038e353 KH |
44 | |
45 | #define PHY_PACKET_CONFIG 0x0 | |
46 | #define PHY_PACKET_LINK_ON 0x1 | |
47 | #define PHY_PACKET_SELF_ID 0x2 | |
48 | ||
ecab4133 MB |
49 | /* Bit fields _within_ the PHY registers. */ |
50 | #define PHY_LINK_ACTIVE 0x80 | |
51 | #define PHY_CONTENDER 0x40 | |
52 | #define PHY_BUS_RESET 0x40 | |
53 | #define PHY_BUS_SHORT_RESET 0x40 | |
54 | ||
93c4cceb KH |
55 | #define CSR_REGISTER_BASE 0xfffff0000000ULL |
56 | ||
57 | /* register offsets relative to CSR_REGISTER_BASE */ | |
58 | #define CSR_STATE_CLEAR 0x0 | |
59 | #define CSR_STATE_SET 0x4 | |
60 | #define CSR_NODE_IDS 0x8 | |
61 | #define CSR_RESET_START 0xc | |
62 | #define CSR_SPLIT_TIMEOUT_HI 0x18 | |
63 | #define CSR_SPLIT_TIMEOUT_LO 0x1c | |
64 | #define CSR_CYCLE_TIME 0x200 | |
65 | #define CSR_BUS_TIME 0x204 | |
66 | #define CSR_BUSY_TIMEOUT 0x210 | |
67 | #define CSR_BUS_MANAGER_ID 0x21c | |
68 | #define CSR_BANDWIDTH_AVAILABLE 0x220 | |
69 | #define CSR_CHANNELS_AVAILABLE 0x224 | |
70 | #define CSR_CHANNELS_AVAILABLE_HI 0x224 | |
71 | #define CSR_CHANNELS_AVAILABLE_LO 0x228 | |
72 | #define CSR_BROADCAST_CHANNEL 0x234 | |
73 | #define CSR_CONFIG_ROM 0x400 | |
74 | #define CSR_CONFIG_ROM_END 0x800 | |
75 | #define CSR_FCP_COMMAND 0xB00 | |
76 | #define CSR_FCP_RESPONSE 0xD00 | |
77 | #define CSR_FCP_END 0xF00 | |
78 | #define CSR_TOPOLOGY_MAP 0x1000 | |
79 | #define CSR_TOPOLOGY_MAP_END 0x1400 | |
80 | #define CSR_SPEED_MAP 0x2000 | |
81 | #define CSR_SPEED_MAP_END 0x3000 | |
82 | ||
3038e353 KH |
83 | #define fw_notify(s, args...) printk(KERN_NOTICE KBUILD_MODNAME ": " s, ## args) |
84 | #define fw_error(s, args...) printk(KERN_ERR KBUILD_MODNAME ": " s, ## args) | |
3038e353 KH |
85 | |
86 | static inline void | |
87 | fw_memcpy_from_be32(void *_dst, void *_src, size_t size) | |
88 | { | |
efbf390a SR |
89 | u32 *dst = _dst; |
90 | __be32 *src = _src; | |
3038e353 KH |
91 | int i; |
92 | ||
93 | for (i = 0; i < size / 4; i++) | |
efbf390a | 94 | dst[i] = be32_to_cpu(src[i]); |
3038e353 KH |
95 | } |
96 | ||
97 | static inline void | |
98 | fw_memcpy_to_be32(void *_dst, void *_src, size_t size) | |
99 | { | |
100 | fw_memcpy_from_be32(_dst, _src, size); | |
101 | } | |
102 | ||
103 | struct fw_card; | |
104 | struct fw_packet; | |
105 | struct fw_node; | |
106 | struct fw_request; | |
107 | ||
108 | struct fw_descriptor { | |
109 | struct list_head link; | |
110 | size_t length; | |
937f6879 | 111 | u32 immediate; |
3038e353 | 112 | u32 key; |
21ebcd12 | 113 | const u32 *data; |
3038e353 KH |
114 | }; |
115 | ||
a98e2719 KH |
116 | int fw_core_add_descriptor(struct fw_descriptor *desc); |
117 | void fw_core_remove_descriptor(struct fw_descriptor *desc); | |
3038e353 | 118 | |
a98e2719 KH |
119 | typedef void (*fw_packet_callback_t)(struct fw_packet *packet, |
120 | struct fw_card *card, int status); | |
3038e353 KH |
121 | |
122 | typedef void (*fw_transaction_callback_t)(struct fw_card *card, int rcode, | |
123 | void *data, | |
124 | size_t length, | |
125 | void *callback_data); | |
126 | ||
9c9bdf4d SR |
127 | /* |
128 | * Important note: The callback must guarantee that either fw_send_response() | |
129 | * or kfree() is called on the @request. | |
130 | */ | |
3038e353 KH |
131 | typedef void (*fw_address_callback_t)(struct fw_card *card, |
132 | struct fw_request *request, | |
133 | int tcode, int destination, int source, | |
134 | int generation, int speed, | |
135 | unsigned long long offset, | |
136 | void *data, size_t length, | |
137 | void *callback_data); | |
138 | ||
139 | typedef void (*fw_bus_reset_callback_t)(struct fw_card *handle, | |
140 | int node_id, int generation, | |
141 | u32 *self_ids, | |
142 | int self_id_count, | |
143 | void *callback_data); | |
144 | ||
145 | struct fw_packet { | |
5e20c282 SR |
146 | int speed; |
147 | int generation; | |
148 | u32 header[4]; | |
149 | size_t header_length; | |
150 | void *payload; | |
151 | size_t payload_length; | |
152 | u32 timestamp; | |
153 | ||
c781c06d KH |
154 | /* |
155 | * This callback is called when the packet transmission has | |
5e20c282 SR |
156 | * completed; for successful transmission, the status code is |
157 | * the ack received from the destination, otherwise it's a | |
158 | * negative errno: ENOMEM, ESTALE, ETIMEDOUT, ENODEV, EIO. | |
159 | * The callback can be called from tasklet context and thus | |
160 | * must never block. | |
161 | */ | |
162 | fw_packet_callback_t callback; | |
2639a6fb | 163 | int ack; |
5e20c282 | 164 | struct list_head link; |
f319b6a0 | 165 | void *driver_data; |
3038e353 KH |
166 | }; |
167 | ||
168 | struct fw_transaction { | |
5e20c282 SR |
169 | int node_id; /* The generation is implied; it is always the current. */ |
170 | int tlabel; | |
171 | int timestamp; | |
172 | struct list_head link; | |
3038e353 | 173 | |
5e20c282 | 174 | struct fw_packet packet; |
3038e353 | 175 | |
c781c06d KH |
176 | /* |
177 | * The data passed to the callback is valid only during the | |
178 | * callback. | |
179 | */ | |
5e20c282 SR |
180 | fw_transaction_callback_t callback; |
181 | void *callback_data; | |
3038e353 KH |
182 | }; |
183 | ||
95688e97 | 184 | static inline struct fw_packet * |
3038e353 KH |
185 | fw_packet(struct list_head *l) |
186 | { | |
a98e2719 | 187 | return list_entry(l, struct fw_packet, link); |
3038e353 KH |
188 | } |
189 | ||
190 | struct fw_address_handler { | |
5e20c282 SR |
191 | u64 offset; |
192 | size_t length; | |
193 | fw_address_callback_t address_callback; | |
194 | void *callback_data; | |
195 | struct list_head link; | |
3038e353 KH |
196 | }; |
197 | ||
198 | ||
199 | struct fw_address_region { | |
200 | u64 start; | |
201 | u64 end; | |
202 | }; | |
203 | ||
21ebcd12 SR |
204 | extern const struct fw_address_region fw_low_memory_region; |
205 | extern const struct fw_address_region fw_high_memory_region; | |
206 | extern const struct fw_address_region fw_private_region; | |
207 | extern const struct fw_address_region fw_csr_region; | |
208 | extern const struct fw_address_region fw_unit_space_region; | |
3038e353 KH |
209 | |
210 | int fw_core_add_address_handler(struct fw_address_handler *handler, | |
21ebcd12 | 211 | const struct fw_address_region *region); |
3038e353 | 212 | void fw_core_remove_address_handler(struct fw_address_handler *handler); |
93c4cceb KH |
213 | void fw_fill_response(struct fw_packet *response, u32 *request_header, |
214 | int rcode, void *payload, size_t length); | |
3038e353 KH |
215 | void fw_send_response(struct fw_card *card, |
216 | struct fw_request *request, int rcode); | |
217 | ||
218 | extern struct bus_type fw_bus_type; | |
219 | ||
220 | struct fw_card { | |
21ebcd12 | 221 | const struct fw_card_driver *driver; |
3038e353 | 222 | struct device *device; |
855c603d | 223 | atomic_t device_count; |
49e1179b | 224 | struct kref kref; |
3038e353 | 225 | |
5e20c282 SR |
226 | int node_id; |
227 | int generation; | |
228 | /* This is the generation used for timestamping incoming requests. */ | |
229 | int request_generation; | |
230 | int current_tlabel, tlabel_mask; | |
231 | struct list_head transaction_list; | |
3038e353 | 232 | struct timer_list flush_timer; |
931c4834 | 233 | unsigned long reset_jiffies; |
3038e353 | 234 | |
5e20c282 | 235 | unsigned long long guid; |
25659f71 | 236 | unsigned max_receive; |
3038e353 KH |
237 | int link_speed; |
238 | int config_rom_generation; | |
239 | ||
c781c06d KH |
240 | /* |
241 | * We need to store up to 4 self ID for a maximum of 63 | |
242 | * devices plus 3 words for the topology map header. | |
243 | */ | |
5e20c282 | 244 | int self_id_count; |
473d28c7 | 245 | u32 topology_map[252 + 3]; |
3038e353 KH |
246 | |
247 | spinlock_t lock; /* Take this lock when handling the lists in | |
248 | * this struct. */ | |
249 | struct fw_node *local_node; | |
250 | struct fw_node *root_node; | |
251 | struct fw_node *irm_node; | |
252 | int color; | |
83db801c | 253 | int gap_count; |
24d40125 | 254 | bool beta_repeaters_present; |
3038e353 KH |
255 | |
256 | int index; | |
257 | ||
3038e353 | 258 | struct list_head link; |
19a15b93 | 259 | |
931c4834 | 260 | /* Work struct for BM duties. */ |
19a15b93 | 261 | struct delayed_work work; |
931c4834 KH |
262 | int bm_retries; |
263 | int bm_generation; | |
3038e353 KH |
264 | }; |
265 | ||
266 | struct fw_card *fw_card_get(struct fw_card *card); | |
267 | void fw_card_put(struct fw_card *card); | |
268 | ||
c781c06d KH |
269 | /* |
270 | * The iso packet format allows for an immediate header/payload part | |
3038e353 KH |
271 | * stored in 'header' immediately after the packet info plus an |
272 | * indirect payload part that is pointer to by the 'payload' field. | |
273 | * Applications can use one or the other or both to implement simple | |
274 | * low-bandwidth streaming (e.g. audio) or more advanced | |
c781c06d KH |
275 | * scatter-gather streaming (e.g. assembling video frame automatically). |
276 | */ | |
3038e353 KH |
277 | |
278 | struct fw_iso_packet { | |
5e20c282 | 279 | u16 payload_length; /* Length of indirect payload. */ |
3038e353 KH |
280 | u32 interrupt : 1; /* Generate interrupt on this packet */ |
281 | u32 skip : 1; /* Set to not send packet at all. */ | |
282 | u32 tag : 2; | |
283 | u32 sy : 4; | |
284 | u32 header_length : 8; /* Length of immediate header. */ | |
5e20c282 | 285 | u32 header[0]; |
3038e353 KH |
286 | }; |
287 | ||
288 | #define FW_ISO_CONTEXT_TRANSMIT 0 | |
289 | #define FW_ISO_CONTEXT_RECEIVE 1 | |
290 | ||
98b6cbe8 KH |
291 | #define FW_ISO_CONTEXT_MATCH_TAG0 1 |
292 | #define FW_ISO_CONTEXT_MATCH_TAG1 2 | |
293 | #define FW_ISO_CONTEXT_MATCH_TAG2 4 | |
294 | #define FW_ISO_CONTEXT_MATCH_TAG3 8 | |
295 | #define FW_ISO_CONTEXT_MATCH_ALL_TAGS 15 | |
296 | ||
3038e353 KH |
297 | struct fw_iso_context; |
298 | ||
a98e2719 KH |
299 | typedef void (*fw_iso_callback_t)(struct fw_iso_context *context, |
300 | u32 cycle, | |
301 | size_t header_length, | |
302 | void *header, | |
303 | void *data); | |
3038e353 | 304 | |
c781c06d KH |
305 | /* |
306 | * An iso buffer is just a set of pages mapped for DMA in the | |
9aad8125 KH |
307 | * specified direction. Since the pages are to be used for DMA, they |
308 | * are not mapped into the kernel virtual address space. We store the | |
309 | * DMA address in the page private. The helper function | |
c781c06d KH |
310 | * fw_iso_buffer_map() will map the pages into a given vma. |
311 | */ | |
9aad8125 KH |
312 | |
313 | struct fw_iso_buffer { | |
314 | enum dma_data_direction direction; | |
315 | struct page **pages; | |
316 | int page_count; | |
317 | }; | |
318 | ||
3038e353 KH |
319 | struct fw_iso_context { |
320 | struct fw_card *card; | |
321 | int type; | |
322 | int channel; | |
323 | int speed; | |
295e3feb | 324 | size_t header_size; |
3038e353 KH |
325 | fw_iso_callback_t callback; |
326 | void *callback_data; | |
3038e353 KH |
327 | }; |
328 | ||
9aad8125 KH |
329 | int |
330 | fw_iso_buffer_init(struct fw_iso_buffer *buffer, | |
331 | struct fw_card *card, | |
332 | int page_count, | |
333 | enum dma_data_direction direction); | |
334 | int | |
335 | fw_iso_buffer_map(struct fw_iso_buffer *buffer, struct vm_area_struct *vma); | |
336 | void | |
337 | fw_iso_buffer_destroy(struct fw_iso_buffer *buffer, struct fw_card *card); | |
338 | ||
3038e353 | 339 | struct fw_iso_context * |
21efb3cf | 340 | fw_iso_context_create(struct fw_card *card, int type, |
eb0306ea | 341 | int channel, int speed, size_t header_size, |
295e3feb | 342 | fw_iso_callback_t callback, void *callback_data); |
9aad8125 | 343 | |
3038e353 KH |
344 | void |
345 | fw_iso_context_destroy(struct fw_iso_context *ctx); | |
346 | ||
3038e353 KH |
347 | int |
348 | fw_iso_context_queue(struct fw_iso_context *ctx, | |
9aad8125 KH |
349 | struct fw_iso_packet *packet, |
350 | struct fw_iso_buffer *buffer, | |
351 | unsigned long payload); | |
3038e353 KH |
352 | |
353 | int | |
eb0306ea KH |
354 | fw_iso_context_start(struct fw_iso_context *ctx, |
355 | int cycle, int sync, int tags); | |
3038e353 | 356 | |
b8295668 KH |
357 | int |
358 | fw_iso_context_stop(struct fw_iso_context *ctx); | |
359 | ||
3038e353 | 360 | struct fw_card_driver { |
5e20c282 | 361 | const char *name; |
3038e353 | 362 | |
c781c06d KH |
363 | /* |
364 | * Enable the given card with the given initial config rom. | |
5e20c282 SR |
365 | * This function is expected to activate the card, and either |
366 | * enable the PHY or set the link_on bit and initiate a bus | |
c781c06d KH |
367 | * reset. |
368 | */ | |
a98e2719 | 369 | int (*enable)(struct fw_card *card, u32 *config_rom, size_t length); |
3038e353 | 370 | |
a98e2719 KH |
371 | int (*update_phy_reg)(struct fw_card *card, int address, |
372 | int clear_bits, int set_bits); | |
3038e353 | 373 | |
c781c06d KH |
374 | /* |
375 | * Update the config rom for an enabled card. This function | |
5e20c282 | 376 | * should change the config rom that is presented on the bus |
c781c06d KH |
377 | * an initiate a bus reset. |
378 | */ | |
a98e2719 KH |
379 | int (*set_config_rom)(struct fw_card *card, |
380 | u32 *config_rom, size_t length); | |
3038e353 | 381 | |
a98e2719 KH |
382 | void (*send_request)(struct fw_card *card, struct fw_packet *packet); |
383 | void (*send_response)(struct fw_card *card, struct fw_packet *packet); | |
730c32f5 | 384 | /* Calling cancel is valid once a packet has been submitted. */ |
a98e2719 | 385 | int (*cancel_packet)(struct fw_card *card, struct fw_packet *packet); |
3038e353 | 386 | |
c781c06d KH |
387 | /* |
388 | * Allow the specified node ID to do direct DMA out and in of | |
3038e353 KH |
389 | * host memory. The card will disable this for all node when |
390 | * a bus reset happens, so driver need to reenable this after | |
391 | * bus reset. Returns 0 on success, -ENODEV if the card | |
392 | * doesn't support this, -ESTALE if the generation doesn't | |
c781c06d KH |
393 | * match. |
394 | */ | |
a98e2719 KH |
395 | int (*enable_phys_dma)(struct fw_card *card, |
396 | int node_id, int generation); | |
3038e353 | 397 | |
a98e2719 | 398 | u64 (*get_bus_time)(struct fw_card *card); |
d60d7f1d | 399 | |
3038e353 | 400 | struct fw_iso_context * |
eb0306ea | 401 | (*allocate_iso_context)(struct fw_card *card, |
d2746dc1 | 402 | int type, size_t header_size); |
3038e353 KH |
403 | void (*free_iso_context)(struct fw_iso_context *ctx); |
404 | ||
eb0306ea KH |
405 | int (*start_iso)(struct fw_iso_context *ctx, |
406 | s32 cycle, u32 sync, u32 tags); | |
3038e353 KH |
407 | |
408 | int (*queue_iso)(struct fw_iso_context *ctx, | |
9aad8125 KH |
409 | struct fw_iso_packet *packet, |
410 | struct fw_iso_buffer *buffer, | |
411 | unsigned long payload); | |
b8295668 KH |
412 | |
413 | int (*stop_iso)(struct fw_iso_context *ctx); | |
3038e353 KH |
414 | }; |
415 | ||
416 | int | |
417 | fw_core_initiate_bus_reset(struct fw_card *card, int short_reset); | |
418 | ||
419 | void | |
420 | fw_send_request(struct fw_card *card, struct fw_transaction *t, | |
421 | int tcode, int node_id, int generation, int speed, | |
422 | unsigned long long offset, | |
423 | void *data, size_t length, | |
424 | fw_transaction_callback_t callback, void *callback_data); | |
425 | ||
730c32f5 KH |
426 | int fw_cancel_transaction(struct fw_card *card, |
427 | struct fw_transaction *transaction); | |
428 | ||
3038e353 KH |
429 | void fw_flush_transactions(struct fw_card *card); |
430 | ||
83db801c KH |
431 | void fw_send_phy_config(struct fw_card *card, |
432 | int node_id, int generation, int gap_count); | |
3038e353 | 433 | |
c781c06d KH |
434 | /* |
435 | * Called by the topology code to inform the device code of node | |
436 | * activity; found, lost, or updated nodes. | |
437 | */ | |
3038e353 KH |
438 | void |
439 | fw_node_event(struct fw_card *card, struct fw_node *node, int event); | |
440 | ||
441 | /* API used by card level drivers */ | |
442 | ||
3038e353 | 443 | void |
21ebcd12 | 444 | fw_card_initialize(struct fw_card *card, const struct fw_card_driver *driver, |
3038e353 KH |
445 | struct device *device); |
446 | int | |
447 | fw_card_add(struct fw_card *card, | |
448 | u32 max_receive, u32 link_speed, u64 guid); | |
449 | ||
450 | void | |
451 | fw_core_remove_card(struct fw_card *card); | |
452 | ||
453 | void | |
454 | fw_core_handle_bus_reset(struct fw_card *card, | |
455 | int node_id, int generation, | |
456 | int self_id_count, u32 *self_ids); | |
457 | void | |
2639a6fb | 458 | fw_core_handle_request(struct fw_card *card, struct fw_packet *request); |
3038e353 | 459 | |
2639a6fb KH |
460 | void |
461 | fw_core_handle_response(struct fw_card *card, struct fw_packet *packet); | |
3038e353 | 462 | |
687198bb | 463 | #endif /* __fw_transaction_h */ |