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"
16 #include "highlevel.h"
22 struct list_head host_list;
28 struct list_head pending_packets;
29 struct timer_list timeout;
30 unsigned long timeout_interval;
32 int node_count; /* number of identified nodes on this bus */
33 int selfid_count; /* total number of SelfIDs received */
34 int nodes_active; /* number of nodes with active link layer */
36 nodeid_t node_id; /* node ID of this host */
37 nodeid_t irm_id; /* ID of this bus' isochronous resource manager */
38 nodeid_t busmgr_id; /* ID of this bus' bus manager */
40 /* this nodes state */
41 unsigned in_bus_reset:1;
42 unsigned is_shutdown:1;
43 unsigned resume_packet_sent:1;
45 /* this nodes' duties on the bus */
52 quadlet_t *topology_map;
56 struct hpsb_host_driver *driver;
59 struct device host_dev;
61 struct delayed_work delayed_reset;
62 unsigned config_roms:31;
63 unsigned update_config_rom:1;
65 struct list_head addr_space;
66 u64 low_addr_space; /* upper bound of physical DMA area */
67 u64 middle_addr_space; /* upper bound of posted write area */
69 u8 speed[ALL_NODES]; /* speed between each node and local node */
71 /* per node tlabel allocation */
72 u8 next_tl[ALL_NODES];
73 struct { DECLARE_BITMAP(map, 64); } tl_pool[ALL_NODES];
75 struct csr_control csr;
77 struct hpsb_address_serve dummy_zero_addr;
78 struct hpsb_address_serve dummy_max_addr;
82 /* Host is requested to reset its bus and cancel all outstanding async
83 * requests. If arg == 1, it shall also attempt to become root on the
84 * bus. Return void. */
87 /* Arg is void, return value is the hardware cycle counter value. */
90 /* Set the hardware cycle counter to the value in arg, return void.
91 * FIXME - setting is probably not required. */
94 /* Configure hardware for new bus ID in arg, return void. */
97 /* If arg true, start sending cycle start packets, stop if arg == 0.
101 /* Cancel all outstanding async requests without resetting the bus.
107 /* rawiso API - see iso.h for the meanings of these commands
108 * (they correspond exactly to the hpsb_iso_* API functions)
109 * INIT = allocate resources
110 * START = begin transmission/reception
111 * STOP = halt transmission/reception
112 * QUEUE/RELEASE = produce/consume packets
113 * SHUTDOWN = deallocate resources
123 RECV_LISTEN_CHANNEL, /* multi-channel only */
124 RECV_UNLISTEN_CHANNEL, /* multi-channel only */
125 RECV_SET_CHANNEL_MASK, /* multi-channel only; arg is a *u64 */
134 /* 166 microsecond reset -- only type of reset available on
135 non-1394a capable controllers */
138 /* Short (arbitrated) reset -- only available on 1394a capable
142 /* Variants that set force_root before issueing the bus reset */
143 LONG_RESET_FORCE_ROOT, SHORT_RESET_FORCE_ROOT,
145 /* Variants that clear force_root before issueing the bus reset */
146 LONG_RESET_NO_FORCE_ROOT, SHORT_RESET_NO_FORCE_ROOT
149 struct hpsb_host_driver {
150 struct module *owner;
153 /* The hardware driver may optionally support a function that is used
154 * to set the hardware ConfigROM if the hardware supports handling
155 * reads to the ConfigROM on its own. */
156 void (*set_hw_config_rom)(struct hpsb_host *host,
157 quadlet_t *config_rom);
159 /* This function shall implement packet transmission based on
160 * packet->type. It shall CRC both parts of the packet (unless
161 * packet->type == raw) and do byte-swapping as necessary or instruct
162 * the hardware to do so. It can return immediately after the packet
163 * was queued for sending. After sending, hpsb_sent_packet() has to be
164 * called. Return 0 on success, negative errno on failure.
165 * NOTE: The function must be callable in interrupt context.
167 int (*transmit_packet)(struct hpsb_host *host,
168 struct hpsb_packet *packet);
170 /* This function requests miscellanous services from the driver, see
171 * above for command codes and expected actions. Return -1 for unknown
172 * command, though that should never happen.
174 int (*devctl)(struct hpsb_host *host, enum devctl_cmd command, int arg);
176 /* ISO transmission/reception functions. Return 0 on success, -1
177 * (or -EXXX errno code) on failure. If the low-level driver does not
178 * support the new ISO API, set isoctl to NULL.
180 int (*isoctl)(struct hpsb_iso *iso, enum isoctl_cmd command,
183 /* This function is mainly to redirect local CSR reads/locks to the iso
184 * management registers (bus manager id, bandwidth available, channels
185 * available) to the hardware registers in OHCI. reg is 0,1,2,3 for bus
186 * mgr, bwdth avail, ch avail hi, ch avail lo respectively (the same ids
187 * as OHCI uses). data and compare are the new data and expected data
188 * respectively, return value is the old value.
190 quadlet_t (*hw_csr_reg) (struct hpsb_host *host, int reg,
191 quadlet_t data, quadlet_t compare);
194 struct hpsb_host *hpsb_alloc_host(struct hpsb_host_driver *drv, size_t extra,
196 int hpsb_add_host(struct hpsb_host *host);
197 void hpsb_resume_host(struct hpsb_host *host);
198 void hpsb_remove_host(struct hpsb_host *host);
199 int hpsb_update_config_rom_image(struct hpsb_host *host);
201 #endif /* _IEEE1394_HOSTS_H */