1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
|
#ifndef _IEEE1394_CORE_H
#define _IEEE1394_CORE_H
#include <linux/slab.h>
#include <asm/atomic.h>
#include <asm/semaphore.h>
#include "hosts.h"
struct hpsb_packet {
/* This struct is basically read-only for hosts with the exception of
* the data buffer contents and xnext - see below. */
/* This can be used for host driver internal linking.
*
* NOTE: This must be left in init state when the driver is done
* with it (e.g. by using list_del_init()), since the core does
* some sanity checks to make sure the packet is not on a
* driver_list when free'ing it. */
struct list_head driver_list;
nodeid_t node_id;
/* Async and Iso types should be clear, raw means send-as-is, do not
* CRC! Byte swapping shall still be done in this case. */
enum { hpsb_async, hpsb_iso, hpsb_raw } __attribute__((packed)) type;
/* Okay, this is core internal and a no care for hosts.
* queued = queued for sending
* pending = sent, waiting for response
* complete = processing completed, successful or not
*/
enum {
hpsb_unused, hpsb_queued, hpsb_pending, hpsb_complete
} __attribute__((packed)) state;
/* These are core internal. */
signed char tlabel;
signed char ack_code;
unsigned char tcode;
unsigned expect_response:1;
unsigned no_waiter:1;
/* Speed to transmit with: 0 = 100Mbps, 1 = 200Mbps, 2 = 400Mbps */
unsigned speed_code:2;
/*
* *header and *data are guaranteed to be 32-bit DMAable and may be
* overwritten to allow in-place byte swapping. Neither of these is
* CRCed (the sizes also don't include CRC), but contain space for at
* least one additional quadlet to allow in-place CRCing. The memory is
* also guaranteed to be DMA mappable.
*/
quadlet_t *header;
quadlet_t *data;
size_t header_size;
size_t data_size;
struct hpsb_host *host;
unsigned int generation;
atomic_t refcnt;
/* Function (and possible data to pass to it) to call when this
* packet is completed. */
void (*complete_routine)(void *);
void *complete_data;
/* XXX This is just a hack at the moment */
struct sk_buff *skb;
/* Store jiffies for implementing bus timeouts. */
unsigned long sendtime;
quadlet_t embedded_header[5];
};
/* Set a task for when a packet completes */
void hpsb_set_packet_complete_task(struct hpsb_packet *packet,
void (*routine)(void *), void *data);
static inline struct hpsb_packet *driver_packet(struct list_head *l)
{
return list_entry(l, struct hpsb_packet, driver_list);
}
void abort_timedouts(unsigned long __opaque);
struct hpsb_packet *hpsb_alloc_packet(size_t data_size);
void hpsb_free_packet(struct hpsb_packet *packet);
/*
* Generation counter for the complete 1394 subsystem. Generation gets
* incremented on every change in the subsystem (e.g. bus reset).
*
* Use the functions, not the variable.
*/
static inline unsigned int get_hpsb_generation(struct hpsb_host *host)
{
return atomic_read(&host->generation);
}
/*
* Send a PHY configuration packet, return 0 on success, negative
* errno on failure.
*/
int hpsb_send_phy_config(struct hpsb_host *host, int rootid, int gapcnt);
/*
* Queue packet for transmitting, return 0 on success, negative errno
* on failure.
*/
int hpsb_send_packet(struct hpsb_packet *packet);
/*
* Queue packet for transmitting, and block until the transaction
* completes. Return 0 on success, negative errno on failure.
*/
int hpsb_send_packet_and_wait(struct hpsb_packet *packet);
/* Initiate bus reset on the given host. Returns 1 if bus reset already in
* progress, 0 otherwise. */
int hpsb_reset_bus(struct hpsb_host *host, int type);
/*
* The following functions are exported for host driver module usage. All of
* them are safe to use in interrupt contexts, although some are quite
* complicated so you may want to run them in bottom halves instead of calling
* them directly.
*/
/* Notify a bus reset to the core. Returns 1 if bus reset already in progress,
* 0 otherwise. */
int hpsb_bus_reset(struct hpsb_host *host);
/*
* Hand over received selfid packet to the core. Complement check (second
* quadlet is complement of first) is expected to be done and successful.
*/
void hpsb_selfid_received(struct hpsb_host *host, quadlet_t sid);
/*
* Notify completion of SelfID stage to the core and report new physical ID
* and whether host is root now.
*/
void hpsb_selfid_complete(struct hpsb_host *host, int phyid, int isroot);
/*
* Notify core of sending a packet. Ackcode is the ack code returned for async
* transmits or ACKX_SEND_ERROR if the transmission failed completely; ACKX_NONE
* for other cases (internal errors that don't justify a panic). Safe to call
* from within a transmit packet routine.
*/
void hpsb_packet_sent(struct hpsb_host *host, struct hpsb_packet *packet,
int ackcode);
/*
* Hand over received packet to the core. The contents of data are expected to
* be the full packet but with the CRCs left out (data block follows header
* immediately), with the header (i.e. the first four quadlets) in machine byte
* order and the data block in big endian. *data can be safely overwritten
* after this call.
*
* If the packet is a write request, write_acked is to be set to true if it was
* ack_complete'd already, false otherwise. This arg is ignored for any other
* packet type.
*/
void hpsb_packet_received(struct hpsb_host *host, quadlet_t *data, size_t size,
int write_acked);
/*
* CHARACTER DEVICE DISPATCHING
*
* All ieee1394 character device drivers share the same major number
* (major 171). The 256 minor numbers are allocated to the various
* task-specific interfaces (raw1394, video1394, dv1394, etc) in
* blocks of 16.
*
* The core ieee1394.o module allocates the device number region
* 171:0-255, the various drivers must then cdev_add() their cdev
* objects to handle their respective sub-regions.
*
* Minor device number block allocations:
*
* Block 0 ( 0- 15) raw1394
* Block 1 ( 16- 31) video1394
* Block 2 ( 32- 47) dv1394
*
* Blocks 3-14 free for future allocation
*
* Block 15 (240-255) reserved for drivers under development, etc.
*/
#define IEEE1394_MAJOR 171
#define IEEE1394_MINOR_BLOCK_RAW1394 0
#define IEEE1394_MINOR_BLOCK_VIDEO1394 1
#define IEEE1394_MINOR_BLOCK_DV1394 2
#define IEEE1394_MINOR_BLOCK_EXPERIMENTAL 15
#define IEEE1394_CORE_DEV MKDEV(IEEE1394_MAJOR, 0)
#define IEEE1394_RAW1394_DEV MKDEV(IEEE1394_MAJOR, IEEE1394_MINOR_BLOCK_RAW1394 * 16)
#define IEEE1394_VIDEO1394_DEV MKDEV(IEEE1394_MAJOR, IEEE1394_MINOR_BLOCK_VIDEO1394 * 16)
#define IEEE1394_DV1394_DEV MKDEV(IEEE1394_MAJOR, IEEE1394_MINOR_BLOCK_DV1394 * 16)
#define IEEE1394_EXPERIMENTAL_DEV MKDEV(IEEE1394_MAJOR, IEEE1394_MINOR_BLOCK_EXPERIMENTAL * 16)
/* return the index (within a minor number block) of a file */
static inline unsigned char ieee1394_file_to_instance(struct file *file)
{
return file->f_dentry->d_inode->i_cindex;
}
extern int hpsb_disable_irm;
/* Our sysfs bus entry */
extern struct bus_type ieee1394_bus_type;
extern struct class hpsb_host_class;
extern struct class *hpsb_protocol_class;
#endif /* _IEEE1394_CORE_H */
|
