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
|
#ifndef _IEEE1394_HOSTS_H
#define _IEEE1394_HOSTS_H
#include <linux/device.h>
#include <linux/list.h>
#include <linux/skbuff.h>
#include <linux/timer.h>
#include <linux/types.h>
#include <linux/workqueue.h>
#include <asm/atomic.h>
struct pci_dev;
struct module;
#include "ieee1394_types.h"
#include "csr.h"
struct hpsb_packet;
struct hpsb_iso;
struct hpsb_host {
struct list_head host_list;
void *hostdata;
atomic_t generation;
struct sk_buff_head pending_packet_queue;
struct timer_list timeout;
unsigned long timeout_interval;
unsigned char iso_listen_count[64];
int node_count; /* number of identified nodes on this bus */
int selfid_count; /* total number of SelfIDs received */
int nodes_active; /* number of nodes with active link layer */
nodeid_t node_id; /* node ID of this host */
nodeid_t irm_id; /* ID of this bus' isochronous resource manager */
nodeid_t busmgr_id; /* ID of this bus' bus manager */
/* this nodes state */
unsigned in_bus_reset:1;
unsigned is_shutdown:1;
unsigned resume_packet_sent:1;
/* this nodes' duties on the bus */
unsigned is_root:1;
unsigned is_cycmst:1;
unsigned is_irm:1;
unsigned is_busmgr:1;
int reset_retries;
quadlet_t *topology_map;
u8 *speed_map;
int id;
struct hpsb_host_driver *driver;
struct pci_dev *pdev;
struct device device;
struct class_device class_dev;
int update_config_rom;
struct work_struct delayed_reset;
unsigned int config_roms;
struct list_head addr_space;
u64 low_addr_space; /* upper bound of physical DMA area */
u64 middle_addr_space; /* upper bound of posted write area */
u8 speed[ALL_NODES]; /* speed between each node and local node */
/* per node tlabel allocation */
u8 next_tl[ALL_NODES];
struct { DECLARE_BITMAP(map, 64); } tl_pool[ALL_NODES];
struct csr_control csr;
};
enum devctl_cmd {
/* Host is requested to reset its bus and cancel all outstanding async
* requests. If arg == 1, it shall also attempt to become root on the
* bus. Return void. */
RESET_BUS,
/* Arg is void, return value is the hardware cycle counter value. */
GET_CYCLE_COUNTER,
/* Set the hardware cycle counter to the value in arg, return void.
* FIXME - setting is probably not required. */
SET_CYCLE_COUNTER,
/* Configure hardware for new bus ID in arg, return void. */
SET_BUS_ID,
/* If arg true, start sending cycle start packets, stop if arg == 0.
* Return void. */
ACT_CYCLE_MASTER,
/* Cancel all outstanding async requests without resetting the bus.
* Return void. */
CANCEL_REQUESTS,
/* Start or stop receiving isochronous channel in arg. Return void.
* This acts as an optimization hint, hosts are not required not to
* listen on unrequested channels. */
ISO_LISTEN_CHANNEL,
ISO_UNLISTEN_CHANNEL
};
enum isoctl_cmd {
/* rawiso API - see iso.h for the meanings of these commands
* (they correspond exactly to the hpsb_iso_* API functions)
* INIT = allocate resources
* START = begin transmission/reception
* STOP = halt transmission/reception
* QUEUE/RELEASE = produce/consume packets
* SHUTDOWN = deallocate resources
*/
XMIT_INIT,
XMIT_START,
XMIT_STOP,
XMIT_QUEUE,
XMIT_SHUTDOWN,
RECV_INIT,
RECV_LISTEN_CHANNEL, /* multi-channel only */
RECV_UNLISTEN_CHANNEL, /* multi-channel only */
RECV_SET_CHANNEL_MASK, /* multi-channel only; arg is a *u64 */
RECV_START,
RECV_STOP,
RECV_RELEASE,
RECV_SHUTDOWN,
RECV_FLUSH
};
enum reset_types {
/* 166 microsecond reset -- only type of reset available on
non-1394a capable controllers */
LONG_RESET,
/* Short (arbitrated) reset -- only available on 1394a capable
controllers */
SHORT_RESET,
/* Variants that set force_root before issueing the bus reset */
LONG_RESET_FORCE_ROOT, SHORT_RESET_FORCE_ROOT,
/* Variants that clear force_root before issueing the bus reset */
LONG_RESET_NO_FORCE_ROOT, SHORT_RESET_NO_FORCE_ROOT
};
struct hpsb_host_driver {
struct module *owner;
const char *name;
/* The hardware driver may optionally support a function that is used
* to set the hardware ConfigROM if the hardware supports handling
* reads to the ConfigROM on its own. */
void (*set_hw_config_rom)(struct hpsb_host *host,
quadlet_t *config_rom);
/* This function shall implement packet transmission based on
* packet->type. It shall CRC both parts of the packet (unless
* packet->type == raw) and do byte-swapping as necessary or instruct
* the hardware to do so. It can return immediately after the packet
* was queued for sending. After sending, hpsb_sent_packet() has to be
* called. Return 0 on success, negative errno on failure.
* NOTE: The function must be callable in interrupt context.
*/
int (*transmit_packet)(struct hpsb_host *host,
struct hpsb_packet *packet);
/* This function requests miscellanous services from the driver, see
* above for command codes and expected actions. Return -1 for unknown
* command, though that should never happen.
*/
int (*devctl)(struct hpsb_host *host, enum devctl_cmd command, int arg);
/* ISO transmission/reception functions. Return 0 on success, -1
* (or -EXXX errno code) on failure. If the low-level driver does not
* support the new ISO API, set isoctl to NULL.
*/
int (*isoctl)(struct hpsb_iso *iso, enum isoctl_cmd command,
unsigned long arg);
/* This function is mainly to redirect local CSR reads/locks to the iso
* management registers (bus manager id, bandwidth available, channels
* available) to the hardware registers in OHCI. reg is 0,1,2,3 for bus
* mgr, bwdth avail, ch avail hi, ch avail lo respectively (the same ids
* as OHCI uses). data and compare are the new data and expected data
* respectively, return value is the old value.
*/
quadlet_t (*hw_csr_reg) (struct hpsb_host *host, int reg,
quadlet_t data, quadlet_t compare);
};
struct hpsb_host *hpsb_alloc_host(struct hpsb_host_driver *drv, size_t extra,
struct device *dev);
int hpsb_add_host(struct hpsb_host *host);
void hpsb_remove_host(struct hpsb_host *h);
/* Updates the configuration rom image of a host. rom_version must be the
* current version, otherwise it will fail with return value -1. If this
* host does not support config-rom-update, it will return -EINVAL.
* Return value 0 indicates success.
*/
int hpsb_update_config_rom_image(struct hpsb_host *host);
#endif /* _IEEE1394_HOSTS_H */
|
