drivers/ieee1394/hosts.h

   1 #ifndef _IEEE1394_HOSTS_H
   2 #define _IEEE1394_HOSTS_H
   3
   4 #include <linux/device.h>
   5 #include <linux/wait.h>
   6 #include <linux/list.h>
   7 #include <linux/timer.h>
   8 #include <linux/skbuff.h>
   9
  10 #include <asm/semaphore.h>
  11
  12 #include "ieee1394_types.h"
  13 #include "csr.h"
  14
  15
  16 struct hpsb_packet;
  17 struct hpsb_iso;
  18
  19 struct hpsb_host {
  20         struct list_head host_list;
  21
  22         void *hostdata;
  23
  24         atomic_t generation;
  25
  26         struct sk_buff_head pending_packet_queue;
  27
  28         struct timer_list timeout;
  29         unsigned long timeout_interval;
  30
  31         unsigned char iso_listen_count[64];
  32
  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 that are actually active */
  36
  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 */
  40
  41         /* this nodes state */
  42         unsigned in_bus_reset:1;
  43         unsigned is_shutdown:1;
  44         unsigned resume_packet_sent:1;
  45
  46         /* this nodes' duties on the bus */
  47         unsigned is_root:1;
  48         unsigned is_cycmst:1;
  49         unsigned is_irm:1;
  50         unsigned is_busmgr:1;
  51
  52         int reset_retries;
  53         quadlet_t *topology_map;
  54         u8 *speed_map;
  55         struct csr_control csr;
  56
  57         /* Per node tlabel pool allocation */
  58         struct hpsb_tlabel_pool tpool[64];
  59
  60         struct hpsb_host_driver *driver;
  61
  62         struct pci_dev *pdev;
  63
  64         int id;
  65
  66         struct device device;
  67         struct class_device class_dev;
  68
  69         int update_config_rom;
  70         struct work_struct delayed_reset;
  71
  72         unsigned int config_roms;
  73
  74         struct list_head addr_space;
  75 };
  76
  77
  78
  79 enum devctl_cmd {
  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. */
  83         RESET_BUS,
  84
  85         /* Arg is void, return value is the hardware cycle counter value. */
  86         GET_CYCLE_COUNTER,
  87
  88         /* Set the hardware cycle counter to the value in arg, return void.
  89          * FIXME - setting is probably not required. */
  90         SET_CYCLE_COUNTER,
  91
  92         /* Configure hardware for new bus ID in arg, return void. */
  93         SET_BUS_ID,
  94
  95         /* If arg true, start sending cycle start packets, stop if arg == 0.
  96          * Return void. */
  97         ACT_CYCLE_MASTER,
  98
  99         /* Cancel all outstanding async requests without resetting the bus.
 100          * Return void. */
 101         CANCEL_REQUESTS,
 102
 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. */
 106         ISO_LISTEN_CHANNEL,
 107         ISO_UNLISTEN_CHANNEL
 108 };
 109
 110 enum isoctl_cmd {
 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
 118          */
 119
 120         XMIT_INIT,
 121         XMIT_START,
 122         XMIT_STOP,
 123         XMIT_QUEUE,
 124         XMIT_SHUTDOWN,
 125
 126         RECV_INIT,
 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 */
 130         RECV_START,
 131         RECV_STOP,
 132         RECV_RELEASE,
 133         RECV_SHUTDOWN,
 134         RECV_FLUSH
 135 };
 136
 137 enum reset_types {
 138         /* 166 microsecond reset -- only type of reset available on
 139            non-1394a capable controllers */
 140         LONG_RESET,
 141
 142         /* Short (arbitrated) reset -- only available on 1394a capable
 143            controllers */
 144         SHORT_RESET,
 145
 146         /* Variants that set force_root before issueing the bus reset */
 147         LONG_RESET_FORCE_ROOT, SHORT_RESET_FORCE_ROOT,
 148
 149         /* Variants that clear force_root before issueing the bus reset */
 150         LONG_RESET_NO_FORCE_ROOT, SHORT_RESET_NO_FORCE_ROOT
 151 };
 152
 153 struct hpsb_host_driver {
 154         struct module *owner;
 155         const char *name;
 156
 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, quadlet_t *config_rom);
 161
 162         /* This function shall implement packet transmission based on
 163          * packet->type.  It shall CRC both parts of the packet (unless
 164          * packet->type == raw) and do byte-swapping as necessary or instruct
 165          * the hardware to do so.  It can return immediately after the packet
 166          * was queued for sending.  After sending, hpsb_sent_packet() has to be
 167          * called.  Return 0 on success, negative errno on failure.
 168          * NOTE: The function must be callable in interrupt context.
 169          */
 170         int (*transmit_packet) (struct hpsb_host *host,
 171                                 struct hpsb_packet *packet);
 172
 173         /* This function requests miscellanous services from the driver, see
 174          * above for command codes and expected actions.  Return -1 for unknown
 175          * command, though that should never happen.
 176          */
 177         int (*devctl) (struct hpsb_host *host, enum devctl_cmd command, int arg);
 178
 179          /* ISO transmission/reception functions. Return 0 on success, -1
 180           * (or -EXXX errno code) on failure. If the low-level driver does not
 181           * support the new ISO API, set isoctl to NULL.
 182           */
 183         int (*isoctl) (struct hpsb_iso *iso, enum isoctl_cmd command, unsigned long arg);
 184
 185         /* This function is mainly to redirect local CSR reads/locks to the iso
 186          * management registers (bus manager id, bandwidth available, channels
 187          * available) to the hardware registers in OHCI.  reg is 0,1,2,3 for bus
 188          * mgr, bwdth avail, ch avail hi, ch avail lo respectively (the same ids
 189          * as OHCI uses).  data and compare are the new data and expected data
 190          * respectively, return value is the old value.
 191          */
 192         quadlet_t (*hw_csr_reg) (struct hpsb_host *host, int reg,
 193                                  quadlet_t data, quadlet_t compare);
 194 };
 195
 196
 197 struct hpsb_host *hpsb_alloc_host(struct hpsb_host_driver *drv, size_t extra,
 198                                   struct device *dev);
 199 int hpsb_add_host(struct hpsb_host *host);
 200 void hpsb_remove_host(struct hpsb_host *h);
 201
 202 /* The following 2 functions are deprecated and will be removed when the
 203  * raw1394/libraw1394 update is complete. */
 204 int hpsb_update_config_rom(struct hpsb_host *host,
 205       const quadlet_t *new_rom, size_t size, unsigned char rom_version);
 206 int hpsb_get_config_rom(struct hpsb_host *host, quadlet_t *buffer,
 207       size_t buffersize, size_t *rom_size, unsigned char *rom_version);
 208
 209 /* Updates the configuration rom image of a host.  rom_version must be the
 210  * current version, otherwise it will fail with return value -1. If this
 211  * host does not support config-rom-update, it will return -EINVAL.
 212  * Return value 0 indicates success.
 213  */
 214 int hpsb_update_config_rom_image(struct hpsb_host *host);
 215
 216 #endif /* _IEEE1394_HOSTS_H */