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 int node_count; /* number of identified nodes on this bus */
32 int selfid_count; /* total number of SelfIDs received */
33 int nodes_active; /* number of nodes with active link layer */
35 nodeid_t node_id; /* node ID of this host */
36 nodeid_t irm_id; /* ID of this bus' isochronous resource manager */
37 nodeid_t busmgr_id; /* ID of this bus' bus manager */
39 /* this nodes state */
40 unsigned in_bus_reset:1;
41 unsigned is_shutdown:1;
42 unsigned resume_packet_sent:1;
44 /* this nodes' duties on the bus */
51 quadlet_t *topology_map;
55 struct hpsb_host_driver *driver;
58 struct device host_dev;
60 struct delayed_work delayed_reset;
61 unsigned config_roms:31;
62 unsigned update_config_rom:1;
64 struct list_head addr_space;
65 u64 low_addr_space; /* upper bound of physical DMA area */
66 u64 middle_addr_space; /* upper bound of posted write area */
68 u8 speed[ALL_NODES]; /* speed between each node and local node */
70 /* per node tlabel allocation */
71 u8 next_tl[ALL_NODES];
72 struct { DECLARE_BITMAP(map, 64); } tl_pool[ALL_NODES];
74 struct csr_control csr;
78 /* Host is requested to reset its bus and cancel all outstanding async
79 * requests. If arg == 1, it shall also attempt to become root on the
80 * bus. Return void. */
83 /* Arg is void, return value is the hardware cycle counter value. */
86 /* Set the hardware cycle counter to the value in arg, return void.
87 * FIXME - setting is probably not required. */
90 /* Configure hardware for new bus ID in arg, return void. */
93 /* If arg true, start sending cycle start packets, stop if arg == 0.
97 /* Cancel all outstanding async requests without resetting the bus.
103 /* rawiso API - see iso.h for the meanings of these commands
104 * (they correspond exactly to the hpsb_iso_* API functions)
105 * INIT = allocate resources
106 * START = begin transmission/reception
107 * STOP = halt transmission/reception
108 * QUEUE/RELEASE = produce/consume packets
109 * SHUTDOWN = deallocate resources
119 RECV_LISTEN_CHANNEL, /* multi-channel only */
120 RECV_UNLISTEN_CHANNEL, /* multi-channel only */
121 RECV_SET_CHANNEL_MASK, /* multi-channel only; arg is a *u64 */
130 /* 166 microsecond reset -- only type of reset available on
131 non-1394a capable controllers */
134 /* Short (arbitrated) reset -- only available on 1394a capable
138 /* Variants that set force_root before issueing the bus reset */
139 LONG_RESET_FORCE_ROOT, SHORT_RESET_FORCE_ROOT,
141 /* Variants that clear force_root before issueing the bus reset */
142 LONG_RESET_NO_FORCE_ROOT, SHORT_RESET_NO_FORCE_ROOT
145 struct hpsb_host_driver {
146 struct module *owner;
149 /* The hardware driver may optionally support a function that is used
150 * to set the hardware ConfigROM if the hardware supports handling
151 * reads to the ConfigROM on its own. */
152 void (*set_hw_config_rom)(struct hpsb_host *host,
153 quadlet_t *config_rom);
155 /* This function shall implement packet transmission based on
156 * packet->type. It shall CRC both parts of the packet (unless
157 * packet->type == raw) and do byte-swapping as necessary or instruct
158 * the hardware to do so. It can return immediately after the packet
159 * was queued for sending. After sending, hpsb_sent_packet() has to be
160 * called. Return 0 on success, negative errno on failure.
161 * NOTE: The function must be callable in interrupt context.
163 int (*transmit_packet)(struct hpsb_host *host,
164 struct hpsb_packet *packet);
166 /* This function requests miscellanous services from the driver, see
167 * above for command codes and expected actions. Return -1 for unknown
168 * command, though that should never happen.
170 int (*devctl)(struct hpsb_host *host, enum devctl_cmd command, int arg);
172 /* ISO transmission/reception functions. Return 0 on success, -1
173 * (or -EXXX errno code) on failure. If the low-level driver does not
174 * support the new ISO API, set isoctl to NULL.
176 int (*isoctl)(struct hpsb_iso *iso, enum isoctl_cmd command,
179 /* This function is mainly to redirect local CSR reads/locks to the iso
180 * management registers (bus manager id, bandwidth available, channels
181 * available) to the hardware registers in OHCI. reg is 0,1,2,3 for bus
182 * mgr, bwdth avail, ch avail hi, ch avail lo respectively (the same ids
183 * as OHCI uses). data and compare are the new data and expected data
184 * respectively, return value is the old value.
186 quadlet_t (*hw_csr_reg) (struct hpsb_host *host, int reg,
187 quadlet_t data, quadlet_t compare);
190 struct hpsb_host *hpsb_alloc_host(struct hpsb_host_driver *drv, size_t extra,
192 int hpsb_add_host(struct hpsb_host *host);
193 void hpsb_resume_host(struct hpsb_host *host);
194 void hpsb_remove_host(struct hpsb_host *host);
195 int hpsb_update_config_rom_image(struct hpsb_host *host);
197 #endif /* _IEEE1394_HOSTS_H */