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 with active link layer */
  36         u8 speed[ALL_NODES]; /* speed between each node and local node */
  37
  38         nodeid_t node_id;    /* node ID of this host */
  39         nodeid_t irm_id;     /* ID of this bus' isochronous resource manager */
  40         nodeid_t busmgr_id;  /* ID of this bus' bus manager */
  41
  42         /* this nodes state */
  43         unsigned in_bus_reset:1;
  44         unsigned is_shutdown:1;
  45         unsigned resume_packet_sent:1;
  46
  47         /* this nodes' duties on the bus */
  48         unsigned is_root:1;
  49         unsigned is_cycmst:1;
  50         unsigned is_irm:1;
  51         unsigned is_busmgr:1;
  52
  53         int reset_retries;
  54         quadlet_t *topology_map;
  55         u8 *speed_map;
  56         struct csr_control csr;
  57
  58         /* Per node tlabel pool allocation */
  59         struct hpsb_tlabel_pool tpool[ALL_NODES];
  60
  61         struct hpsb_host_driver *driver;
  62
  63         struct pci_dev *pdev;
  64
  65         int id;
  66
  67         struct device device;
  68         struct class_device class_dev;
  69
  70         int update_config_rom;
  71         struct work_struct delayed_reset;
  72
  73         unsigned int config_roms;
  74
  75         struct list_head addr_space;
  76 };
  77
  78
  79
  80 enum devctl_cmd {
  81         /* Host is requested to reset its bus and cancel all outstanding async
  82          * requests.  If arg == 1, it shall also attempt to become root on the
  83          * bus.  Return void. */
  84         RESET_BUS,
  85
  86         /* Arg is void, return value is the hardware cycle counter value. */
  87         GET_CYCLE_COUNTER,
  88
  89         /* Set the hardware cycle counter to the value in arg, return void.
  90          * FIXME - setting is probably not required. */
  91         SET_CYCLE_COUNTER,
  92
  93         /* Configure hardware for new bus ID in arg, return void. */
  94         SET_BUS_ID,
  95
  96         /* If arg true, start sending cycle start packets, stop if arg == 0.
  97          * Return void. */
  98         ACT_CYCLE_MASTER,
  99
 100         /* Cancel all outstanding async requests without resetting the bus.
 101          * Return void. */
 102         CANCEL_REQUESTS,
 103
 104         /* Start or stop receiving isochronous channel in arg.  Return void.
 105          * This acts as an optimization hint, hosts are not required not to
 106          * listen on unrequested channels. */
 107         ISO_LISTEN_CHANNEL,
 108         ISO_UNLISTEN_CHANNEL
 109 };
 110
 111 enum isoctl_cmd {
 112         /* rawiso API - see iso.h for the meanings of these commands
 113            (they correspond exactly to the hpsb_iso_* API functions)
 114          * INIT = allocate resources
 115          * START = begin transmission/reception
 116          * STOP = halt transmission/reception
 117          * QUEUE/RELEASE = produce/consume packets
 118          * SHUTDOWN = deallocate resources
 119          */
 120
 121         XMIT_INIT,
 122         XMIT_START,
 123         XMIT_STOP,
 124         XMIT_QUEUE,
 125         XMIT_SHUTDOWN,
 126
 127         RECV_INIT,
 128         RECV_LISTEN_CHANNEL,   /* multi-channel only */
 129         RECV_UNLISTEN_CHANNEL, /* multi-channel only */
 130         RECV_SET_CHANNEL_MASK, /* multi-channel only; arg is a *u64 */
 131         RECV_START,
 132         RECV_STOP,
 133         RECV_RELEASE,
 134         RECV_SHUTDOWN,
 135         RECV_FLUSH
 136 };
 137
 138 enum reset_types {
 139         /* 166 microsecond reset -- only type of reset available on
 140            non-1394a capable controllers */
 141         LONG_RESET,
 142
 143         /* Short (arbitrated) reset -- only available on 1394a capable
 144            controllers */
 145         SHORT_RESET,
 146
 147         /* Variants that set force_root before issueing the bus reset */
 148         LONG_RESET_FORCE_ROOT, SHORT_RESET_FORCE_ROOT,
 149
 150         /* Variants that clear force_root before issueing the bus reset */
 151         LONG_RESET_NO_FORCE_ROOT, SHORT_RESET_NO_FORCE_ROOT
 152 };
 153
 154 struct hpsb_host_driver {
 155         struct module *owner;
 156         const char *name;
 157
 158         /* The hardware driver may optionally support a function that is used
 159          * to set the hardware ConfigROM if the hardware supports handling
 160          * reads to the ConfigROM on its own. */
 161         void (*set_hw_config_rom) (struct hpsb_host *host, quadlet_t *config_rom);
 162
 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.
 170          */
 171         int (*transmit_packet) (struct hpsb_host *host,
 172                                 struct hpsb_packet *packet);
 173
 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.
 177          */
 178         int (*devctl) (struct hpsb_host *host, enum devctl_cmd command, int arg);
 179
 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.
 183           */
 184         int (*isoctl) (struct hpsb_iso *iso, enum isoctl_cmd command, unsigned long arg);
 185
 186         /* This function is mainly to redirect local CSR reads/locks to the iso
 187          * management registers (bus manager id, bandwidth available, channels
 188          * available) to the hardware registers in OHCI.  reg is 0,1,2,3 for bus
 189          * mgr, bwdth avail, ch avail hi, ch avail lo respectively (the same ids
 190          * as OHCI uses).  data and compare are the new data and expected data
 191          * respectively, return value is the old value.
 192          */
 193         quadlet_t (*hw_csr_reg) (struct hpsb_host *host, int reg,
 194                                  quadlet_t data, quadlet_t compare);
 195 };
 196
 197
 198 struct hpsb_host *hpsb_alloc_host(struct hpsb_host_driver *drv, size_t extra,
 199                                   struct device *dev);
 200 int hpsb_add_host(struct hpsb_host *host);
 201 void hpsb_remove_host(struct hpsb_host *h);
 202
 203 /* The following 2 functions are deprecated and will be removed when the
 204  * raw1394/libraw1394 update is complete. */
 205 int hpsb_update_config_rom(struct hpsb_host *host,
 206       const quadlet_t *new_rom, size_t size, unsigned char rom_version);
 207 int hpsb_get_config_rom(struct hpsb_host *host, quadlet_t *buffer,
 208       size_t buffersize, size_t *rom_size, unsigned char *rom_version);
 209
 210 /* Updates the configuration rom image of a host.  rom_version must be the
 211  * current version, otherwise it will fail with return value -1. If this
 212  * host does not support config-rom-update, it will return -EINVAL.
 213  * Return value 0 indicates success.
 214  */
 215 int hpsb_update_config_rom_image(struct hpsb_host *host);
 216
 217 #endif /* _IEEE1394_HOSTS_H */