1 #ifndef _IEEE1394_HOSTS_H
2 #define _IEEE1394_HOSTS_H
4 #include <linux/device.h>
5 #include <linux/list.h>
6 #include <linux/timer.h>
7 #include <linux/types.h>
8 #include <linux/workqueue.h>
9 #include <asm/atomic.h>
14 #include "ieee1394_types.h"
21 struct list_head host_list;
27 struct list_head pending_packets;
28 struct timer_list timeout;
29 unsigned long timeout_interval;
31 unsigned char iso_listen_count[64];
33 int node_count; /* number of identified nodes on this bus */
34 int selfid_count; /* total number of SelfIDs received */
35 int nodes_active; /* number of nodes with active link layer */
37 nodeid_t node_id; /* node ID of this host */
38 nodeid_t irm_id; /* ID of this bus' isochronous resource manager */
39 nodeid_t busmgr_id; /* ID of this bus' bus manager */
41 /* this nodes state */
42 unsigned in_bus_reset:1;
43 unsigned is_shutdown:1;
44 unsigned resume_packet_sent:1;
46 /* this nodes' duties on the bus */
53 quadlet_t *topology_map;
57 struct hpsb_host_driver *driver;
60 struct class_device class_dev;
62 struct delayed_work delayed_reset;
63 unsigned config_roms:31;
64 unsigned update_config_rom:1;
66 struct list_head addr_space;
67 u64 low_addr_space; /* upper bound of physical DMA area */
68 u64 middle_addr_space; /* upper bound of posted write area */
70 u8 speed[ALL_NODES]; /* speed between each node and local node */
72 /* per node tlabel allocation */
73 u8 next_tl[ALL_NODES];
74 struct { DECLARE_BITMAP(map, 64); } tl_pool[ALL_NODES];
76 struct csr_control csr;
80 /* Host is requested to reset its bus and cancel all outstanding async
81 * requests. If arg == 1, it shall also attempt to become root on the
82 * bus. Return void. */
85 /* Arg is void, return value is the hardware cycle counter value. */
88 /* Set the hardware cycle counter to the value in arg, return void.
89 * FIXME - setting is probably not required. */
92 /* Configure hardware for new bus ID in arg, return void. */
95 /* If arg true, start sending cycle start packets, stop if arg == 0.
99 /* Cancel all outstanding async requests without resetting the bus.
103 /* Start or stop receiving isochronous channel in arg. Return void.
104 * This acts as an optimization hint, hosts are not required not to
105 * listen on unrequested channels. */
111 /* rawiso API - see iso.h for the meanings of these commands
112 * (they correspond exactly to the hpsb_iso_* API functions)
113 * INIT = allocate resources
114 * START = begin transmission/reception
115 * STOP = halt transmission/reception
116 * QUEUE/RELEASE = produce/consume packets
117 * SHUTDOWN = deallocate resources
127 RECV_LISTEN_CHANNEL, /* multi-channel only */
128 RECV_UNLISTEN_CHANNEL, /* multi-channel only */
129 RECV_SET_CHANNEL_MASK, /* multi-channel only; arg is a *u64 */
138 /* 166 microsecond reset -- only type of reset available on
139 non-1394a capable controllers */
142 /* Short (arbitrated) reset -- only available on 1394a capable
146 /* Variants that set force_root before issueing the bus reset */
147 LONG_RESET_FORCE_ROOT, SHORT_RESET_FORCE_ROOT,
149 /* Variants that clear force_root before issueing the bus reset */
150 LONG_RESET_NO_FORCE_ROOT, SHORT_RESET_NO_FORCE_ROOT
153 struct hpsb_host_driver {
154 struct module *owner;
157 /* The hardware driver may optionally support a function that is used
158 * to set the hardware ConfigROM if the hardware supports handling
159 * reads to the ConfigROM on its own. */
160 void (*set_hw_config_rom)(struct hpsb_host *host,
161 quadlet_t *config_rom);
163 /* This function shall implement packet transmission based on
164 * packet->type. It shall CRC both parts of the packet (unless
165 * packet->type == raw) and do byte-swapping as necessary or instruct
166 * the hardware to do so. It can return immediately after the packet
167 * was queued for sending. After sending, hpsb_sent_packet() has to be
168 * called. Return 0 on success, negative errno on failure.
169 * NOTE: The function must be callable in interrupt context.
171 int (*transmit_packet)(struct hpsb_host *host,
172 struct hpsb_packet *packet);
174 /* This function requests miscellanous services from the driver, see
175 * above for command codes and expected actions. Return -1 for unknown
176 * command, though that should never happen.
178 int (*devctl)(struct hpsb_host *host, enum devctl_cmd command, int arg);
180 /* ISO transmission/reception functions. Return 0 on success, -1
181 * (or -EXXX errno code) on failure. If the low-level driver does not
182 * support the new ISO API, set isoctl to NULL.
184 int (*isoctl)(struct hpsb_iso *iso, enum isoctl_cmd command,
187 /* This function is mainly to redirect local CSR reads/locks to the iso
188 * management registers (bus manager id, bandwidth available, channels
189 * available) to the hardware registers in OHCI. reg is 0,1,2,3 for bus
190 * mgr, bwdth avail, ch avail hi, ch avail lo respectively (the same ids
191 * as OHCI uses). data and compare are the new data and expected data
192 * respectively, return value is the old value.
194 quadlet_t (*hw_csr_reg) (struct hpsb_host *host, int reg,
195 quadlet_t data, quadlet_t compare);
198 struct hpsb_host *hpsb_alloc_host(struct hpsb_host_driver *drv, size_t extra,
200 int hpsb_add_host(struct hpsb_host *host);
201 void hpsb_resume_host(struct hpsb_host *host);
202 void hpsb_remove_host(struct hpsb_host *host);
203 int hpsb_update_config_rom_image(struct hpsb_host *host);
205 #endif /* _IEEE1394_HOSTS_H */