2 * Copyright (C) 2003-2006 Kristian Hoegsberg <krh@bitplanet.net>
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.
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.
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.
19 #ifndef __fw_transaction_h
20 #define __fw_transaction_h
22 #include <linux/completion.h>
23 #include <linux/device.h>
24 #include <linux/dma-mapping.h>
25 #include <linux/firewire-constants.h>
26 #include <linux/kref.h>
27 #include <linux/list.h>
28 #include <linux/spinlock_types.h>
29 #include <linux/timer.h>
30 #include <linux/workqueue.h>
32 #define TCODE_IS_READ_REQUEST(tcode) (((tcode) & ~1) == 4)
33 #define TCODE_IS_BLOCK_PACKET(tcode) (((tcode) & 1) != 0)
34 #define TCODE_IS_REQUEST(tcode) (((tcode) & 2) == 0)
35 #define TCODE_IS_RESPONSE(tcode) (((tcode) & 2) != 0)
36 #define TCODE_HAS_REQUEST_DATA(tcode) (((tcode) & 12) != 4)
37 #define TCODE_HAS_RESPONSE_DATA(tcode) (((tcode) & 12) != 0)
39 #define LOCAL_BUS 0xffc0
41 #define SELFID_PORT_CHILD 0x3
42 #define SELFID_PORT_PARENT 0x2
43 #define SELFID_PORT_NCONN 0x1
44 #define SELFID_PORT_NONE 0x0
46 #define PHY_PACKET_CONFIG 0x0
47 #define PHY_PACKET_LINK_ON 0x1
48 #define PHY_PACKET_SELF_ID 0x2
50 /* Bit fields _within_ the PHY registers. */
51 #define PHY_LINK_ACTIVE 0x80
52 #define PHY_CONTENDER 0x40
53 #define PHY_BUS_RESET 0x40
54 #define PHY_BUS_SHORT_RESET 0x40
56 #define CSR_REGISTER_BASE 0xfffff0000000ULL
58 /* register offsets relative to CSR_REGISTER_BASE */
59 #define CSR_STATE_CLEAR 0x0
60 #define CSR_STATE_SET 0x4
61 #define CSR_NODE_IDS 0x8
62 #define CSR_RESET_START 0xc
63 #define CSR_SPLIT_TIMEOUT_HI 0x18
64 #define CSR_SPLIT_TIMEOUT_LO 0x1c
65 #define CSR_CYCLE_TIME 0x200
66 #define CSR_BUS_TIME 0x204
67 #define CSR_BUSY_TIMEOUT 0x210
68 #define CSR_BUS_MANAGER_ID 0x21c
69 #define CSR_BANDWIDTH_AVAILABLE 0x220
70 #define CSR_CHANNELS_AVAILABLE 0x224
71 #define CSR_CHANNELS_AVAILABLE_HI 0x224
72 #define CSR_CHANNELS_AVAILABLE_LO 0x228
73 #define CSR_BROADCAST_CHANNEL 0x234
74 #define CSR_CONFIG_ROM 0x400
75 #define CSR_CONFIG_ROM_END 0x800
76 #define CSR_FCP_COMMAND 0xB00
77 #define CSR_FCP_RESPONSE 0xD00
78 #define CSR_FCP_END 0xF00
79 #define CSR_TOPOLOGY_MAP 0x1000
80 #define CSR_TOPOLOGY_MAP_END 0x1400
81 #define CSR_SPEED_MAP 0x2000
82 #define CSR_SPEED_MAP_END 0x3000
84 #define BROADCAST_CHANNEL_INITIAL (1 << 31 | 31)
85 #define BROADCAST_CHANNEL_VALID (1 << 30)
87 #define fw_notify(s, args...) printk(KERN_NOTICE KBUILD_MODNAME ": " s, ## args)
88 #define fw_error(s, args...) printk(KERN_ERR KBUILD_MODNAME ": " s, ## args)
91 fw_memcpy_from_be32(void *_dst, void *_src, size_t size)
97 for (i = 0; i < size / 4; i++)
98 dst[i] = be32_to_cpu(src[i]);
102 fw_memcpy_to_be32(void *_dst, void *_src, size_t size)
104 fw_memcpy_from_be32(_dst, _src, size);
112 struct fw_descriptor {
113 struct list_head link;
120 int fw_core_add_descriptor(struct fw_descriptor *desc);
121 void fw_core_remove_descriptor(struct fw_descriptor *desc);
123 typedef void (*fw_packet_callback_t)(struct fw_packet *packet,
124 struct fw_card *card, int status);
126 typedef void (*fw_transaction_callback_t)(struct fw_card *card, int rcode,
129 void *callback_data);
132 * Important note: The callback must guarantee that either fw_send_response()
133 * or kfree() is called on the @request.
135 typedef void (*fw_address_callback_t)(struct fw_card *card,
136 struct fw_request *request,
137 int tcode, int destination, int source,
138 int generation, int speed,
139 unsigned long long offset,
140 void *data, size_t length,
141 void *callback_data);
143 typedef void (*fw_bus_reset_callback_t)(struct fw_card *handle,
144 int node_id, int generation,
147 void *callback_data);
153 size_t header_length;
155 size_t payload_length;
159 * This callback is called when the packet transmission has
160 * completed; for successful transmission, the status code is
161 * the ack received from the destination, otherwise it's a
162 * negative errno: ENOMEM, ESTALE, ETIMEDOUT, ENODEV, EIO.
163 * The callback can be called from tasklet context and thus
166 fw_packet_callback_t callback;
168 struct list_head link;
172 struct fw_transaction {
173 int node_id; /* The generation is implied; it is always the current. */
176 struct list_head link;
178 struct fw_packet packet;
181 * The data passed to the callback is valid only during the
184 fw_transaction_callback_t callback;
188 static inline struct fw_packet *
189 fw_packet(struct list_head *l)
191 return list_entry(l, struct fw_packet, link);
194 struct fw_address_handler {
197 fw_address_callback_t address_callback;
199 struct list_head link;
203 struct fw_address_region {
208 extern const struct fw_address_region fw_high_memory_region;
210 int fw_core_add_address_handler(struct fw_address_handler *handler,
211 const struct fw_address_region *region);
212 void fw_core_remove_address_handler(struct fw_address_handler *handler);
213 void fw_fill_response(struct fw_packet *response, u32 *request_header,
214 int rcode, void *payload, size_t length);
215 void fw_send_response(struct fw_card *card,
216 struct fw_request *request, int rcode);
218 extern struct bus_type fw_bus_type;
221 const struct fw_card_driver *driver;
222 struct device *device;
224 struct completion done;
228 int current_tlabel, tlabel_mask;
229 struct list_head transaction_list;
230 struct timer_list flush_timer;
231 unsigned long reset_jiffies;
233 unsigned long long guid;
234 unsigned max_receive;
236 int config_rom_generation;
239 * We need to store up to 4 self ID for a maximum of 63
240 * devices plus 3 words for the topology map header.
243 u32 topology_map[252 + 3];
244 u32 broadcast_channel;
246 spinlock_t lock; /* Take this lock when handling the lists in
248 struct fw_node *local_node;
249 struct fw_node *root_node;
250 struct fw_node *irm_node;
253 bool beta_repeaters_present;
257 struct list_head link;
259 /* Work struct for BM duties. */
260 struct delayed_work work;
265 static inline struct fw_card *fw_card_get(struct fw_card *card)
267 kref_get(&card->kref);
272 void fw_card_release(struct kref *kref);
274 static inline void fw_card_put(struct fw_card *card)
276 kref_put(&card->kref, fw_card_release);
280 * The iso packet format allows for an immediate header/payload part
281 * stored in 'header' immediately after the packet info plus an
282 * indirect payload part that is pointer to by the 'payload' field.
283 * Applications can use one or the other or both to implement simple
284 * low-bandwidth streaming (e.g. audio) or more advanced
285 * scatter-gather streaming (e.g. assembling video frame automatically).
288 struct fw_iso_packet {
289 u16 payload_length; /* Length of indirect payload. */
290 u32 interrupt : 1; /* Generate interrupt on this packet */
291 u32 skip : 1; /* Set to not send packet at all. */
294 u32 header_length : 8; /* Length of immediate header. */
298 #define FW_ISO_CONTEXT_TRANSMIT 0
299 #define FW_ISO_CONTEXT_RECEIVE 1
301 #define FW_ISO_CONTEXT_MATCH_TAG0 1
302 #define FW_ISO_CONTEXT_MATCH_TAG1 2
303 #define FW_ISO_CONTEXT_MATCH_TAG2 4
304 #define FW_ISO_CONTEXT_MATCH_TAG3 8
305 #define FW_ISO_CONTEXT_MATCH_ALL_TAGS 15
307 struct fw_iso_context;
309 typedef void (*fw_iso_callback_t)(struct fw_iso_context *context,
311 size_t header_length,
316 * An iso buffer is just a set of pages mapped for DMA in the
317 * specified direction. Since the pages are to be used for DMA, they
318 * are not mapped into the kernel virtual address space. We store the
319 * DMA address in the page private. The helper function
320 * fw_iso_buffer_map() will map the pages into a given vma.
323 struct fw_iso_buffer {
324 enum dma_data_direction direction;
329 struct fw_iso_context {
330 struct fw_card *card;
335 fw_iso_callback_t callback;
340 fw_iso_buffer_init(struct fw_iso_buffer *buffer,
341 struct fw_card *card,
343 enum dma_data_direction direction);
345 fw_iso_buffer_map(struct fw_iso_buffer *buffer, struct vm_area_struct *vma);
347 fw_iso_buffer_destroy(struct fw_iso_buffer *buffer, struct fw_card *card);
349 struct fw_iso_context *
350 fw_iso_context_create(struct fw_card *card, int type,
351 int channel, int speed, size_t header_size,
352 fw_iso_callback_t callback, void *callback_data);
355 fw_iso_context_destroy(struct fw_iso_context *ctx);
358 fw_iso_context_queue(struct fw_iso_context *ctx,
359 struct fw_iso_packet *packet,
360 struct fw_iso_buffer *buffer,
361 unsigned long payload);
364 fw_iso_context_start(struct fw_iso_context *ctx,
365 int cycle, int sync, int tags);
368 fw_iso_context_stop(struct fw_iso_context *ctx);
370 struct fw_card_driver {
372 * Enable the given card with the given initial config rom.
373 * This function is expected to activate the card, and either
374 * enable the PHY or set the link_on bit and initiate a bus
377 int (*enable)(struct fw_card *card, u32 *config_rom, size_t length);
379 int (*update_phy_reg)(struct fw_card *card, int address,
380 int clear_bits, int set_bits);
383 * Update the config rom for an enabled card. This function
384 * should change the config rom that is presented on the bus
385 * an initiate a bus reset.
387 int (*set_config_rom)(struct fw_card *card,
388 u32 *config_rom, size_t length);
390 void (*send_request)(struct fw_card *card, struct fw_packet *packet);
391 void (*send_response)(struct fw_card *card, struct fw_packet *packet);
392 /* Calling cancel is valid once a packet has been submitted. */
393 int (*cancel_packet)(struct fw_card *card, struct fw_packet *packet);
396 * Allow the specified node ID to do direct DMA out and in of
397 * host memory. The card will disable this for all node when
398 * a bus reset happens, so driver need to reenable this after
399 * bus reset. Returns 0 on success, -ENODEV if the card
400 * doesn't support this, -ESTALE if the generation doesn't
403 int (*enable_phys_dma)(struct fw_card *card,
404 int node_id, int generation);
406 u64 (*get_bus_time)(struct fw_card *card);
408 struct fw_iso_context *
409 (*allocate_iso_context)(struct fw_card *card,
410 int type, size_t header_size);
411 void (*free_iso_context)(struct fw_iso_context *ctx);
413 int (*start_iso)(struct fw_iso_context *ctx,
414 s32 cycle, u32 sync, u32 tags);
416 int (*queue_iso)(struct fw_iso_context *ctx,
417 struct fw_iso_packet *packet,
418 struct fw_iso_buffer *buffer,
419 unsigned long payload);
421 int (*stop_iso)(struct fw_iso_context *ctx);
425 fw_core_initiate_bus_reset(struct fw_card *card, int short_reset);
428 fw_send_request(struct fw_card *card, struct fw_transaction *t,
429 int tcode, int node_id, int generation, int speed,
430 unsigned long long offset,
431 void *data, size_t length,
432 fw_transaction_callback_t callback, void *callback_data);
434 int fw_cancel_transaction(struct fw_card *card,
435 struct fw_transaction *transaction);
437 void fw_flush_transactions(struct fw_card *card);
439 void fw_send_phy_config(struct fw_card *card,
440 int node_id, int generation, int gap_count);
443 * Called by the topology code to inform the device code of node
444 * activity; found, lost, or updated nodes.
447 fw_node_event(struct fw_card *card, struct fw_node *node, int event);
449 /* API used by card level drivers */
452 fw_card_initialize(struct fw_card *card, const struct fw_card_driver *driver,
453 struct device *device);
455 fw_card_add(struct fw_card *card,
456 u32 max_receive, u32 link_speed, u64 guid);
459 fw_core_remove_card(struct fw_card *card);
462 fw_core_handle_bus_reset(struct fw_card *card,
463 int node_id, int generation,
464 int self_id_count, u32 *self_ids);
466 fw_core_handle_request(struct fw_card *card, struct fw_packet *request);
469 fw_core_handle_response(struct fw_card *card, struct fw_packet *packet);
471 #endif /* __fw_transaction_h */