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
  45         /* this nodes' duties on the bus */
  46         unsigned is_root:1;
  47         unsigned is_cycmst:1;
  48         unsigned is_irm:1;
  49         unsigned is_busmgr:1;
  50
  51         int reset_retries;
  52         quadlet_t *topology_map;
  53         u8 *speed_map;
  54         struct csr_control csr;
  55
  56         /* Per node tlabel pool allocation */
  57         struct hpsb_tlabel_pool tpool[64];
  58
  59         struct hpsb_host_driver *driver;
  60
  61         struct pci_dev *pdev;
  62
  63         int id;
  64
  65         struct device device;
  66         struct class_device class_dev;
  67
  68         int update_config_rom;
  69         struct work_struct delayed_reset;
  70
  71         unsigned int config_roms;
  72
  73         struct list_head addr_space;
  74 };
  75
  76
  77
  78 enum devctl_cmd {
  79         /* Host is requested to reset its bus and cancel all outstanding async
  80          * requests.  If arg == 1, it shall also attempt to become root on the
  81          * bus.  Return void. */
  82         RESET_BUS,
  83
  84         /* Arg is void, return value is the hardware cycle counter value. */
  85         GET_CYCLE_COUNTER,
  86
  87         /* Set the hardware cycle counter to the value in arg, return void.
  88          * FIXME - setting is probably not required. */
  89         SET_CYCLE_COUNTER,
  90
  91         /* Configure hardware for new bus ID in arg, return void. */
  92         SET_BUS_ID,
  93
  94         /* If arg true, start sending cycle start packets, stop if arg == 0.
  95          * Return void. */
  96         ACT_CYCLE_MASTER,
  97
  98         /* Cancel all outstanding async requests without resetting the bus.
  99          * Return void. */
 100         CANCEL_REQUESTS,
 101
 102         /* Start or stop receiving isochronous channel in arg.  Return void.
 103          * This acts as an optimization hint, hosts are not required not to
 104          * listen on unrequested channels. */
 105         ISO_LISTEN_CHANNEL,
 106         ISO_UNLISTEN_CHANNEL
 107 };
 108
 109 enum isoctl_cmd {
 110         /* rawiso API - see iso.h for the meanings of these commands
 111            (they correspond exactly to the hpsb_iso_* API functions)
 112          * INIT = allocate resources
 113          * START = begin transmission/reception
 114          * STOP = halt transmission/reception
 115          * QUEUE/RELEASE = produce/consume packets
 116          * SHUTDOWN = deallocate resources
 117          */
 118
 119         XMIT_INIT,
 120         XMIT_START,
 121         XMIT_STOP,
 122         XMIT_QUEUE,
 123         XMIT_SHUTDOWN,
 124
 125         RECV_INIT,
 126         RECV_LISTEN_CHANNEL,   /* multi-channel only */
 127         RECV_UNLISTEN_CHANNEL, /* multi-channel only */
 128         RECV_SET_CHANNEL_MASK, /* multi-channel only; arg is a *u64 */
 129         RECV_START,
 130         RECV_STOP,
 131         RECV_RELEASE,
 132         RECV_SHUTDOWN,
 133         RECV_FLUSH
 134 };
 135
 136 enum reset_types {
 137         /* 166 microsecond reset -- only type of reset available on
 138            non-1394a capable IEEE 1394 controllers */
 139         LONG_RESET,
 140
 141         /* Short (arbitrated) reset -- only available on 1394a capable
 142            IEEE 1394 capable controllers */
 143         SHORT_RESET,
 144
 145         /* Variants, that set force_root before issueing the bus reset */
 146         LONG_RESET_FORCE_ROOT, SHORT_RESET_FORCE_ROOT,
 147
 148         /* Variants, that clear force_root before issueing the bus reset */
 149         LONG_RESET_NO_FORCE_ROOT, SHORT_RESET_NO_FORCE_ROOT
 150 };
 151
 152 struct hpsb_host_driver {
 153         struct module *owner;
 154         const char *name;
 155
 156         /* The hardware driver may optionally support a function that is used
 157          * to set the hardware ConfigROM if the hardware supports handling
 158          * reads to the ConfigROM on its own. */
 159         void (*set_hw_config_rom) (struct hpsb_host *host, quadlet_t *config_rom);
 160
 161         /* This function shall implement packet transmission based on
 162          * packet->type.  It shall CRC both parts of the packet (unless
 163          * packet->type == raw) and do byte-swapping as necessary or instruct
 164          * the hardware to do so.  It can return immediately after the packet
 165          * was queued for sending.  After sending, hpsb_sent_packet() has to be
 166          * called.  Return 0 on success, negative errno on failure.
 167          * NOTE: The function must be callable in interrupt context.
 168          */
 169         int (*transmit_packet) (struct hpsb_host *host,
 170                                 struct hpsb_packet *packet);
 171
 172         /* This function requests miscellanous services from the driver, see
 173          * above for command codes and expected actions.  Return -1 for unknown
 174          * command, though that should never happen.
 175          */
 176         int (*devctl) (struct hpsb_host *host, enum devctl_cmd command, int arg);
 177
 178          /* ISO transmission/reception functions. Return 0 on success, -1
 179           * (or -EXXX errno code) on failure. If the low-level driver does not
 180           * support the new ISO API, set isoctl to NULL.
 181           */
 182         int (*isoctl) (struct hpsb_iso *iso, enum isoctl_cmd command, unsigned long arg);
 183
 184         /* This function is mainly to redirect local CSR reads/locks to the iso
 185          * management registers (bus manager id, bandwidth available, channels
 186          * available) to the hardware registers in OHCI.  reg is 0,1,2,3 for bus
 187          * mgr, bwdth avail, ch avail hi, ch avail lo respectively (the same ids
 188          * as OHCI uses).  data and compare are the new data and expected data
 189          * respectively, return value is the old value.
 190          */
 191         quadlet_t (*hw_csr_reg) (struct hpsb_host *host, int reg,
 192                                  quadlet_t data, quadlet_t compare);
 193 };
 194
 195
 196 struct hpsb_host *hpsb_alloc_host(struct hpsb_host_driver *drv, size_t extra,
 197                                   struct device *dev);
 198 int hpsb_add_host(struct hpsb_host *host);
 199 void hpsb_remove_host(struct hpsb_host *h);
 200
 201 /* The following 2 functions are deprecated and will be removed when the
 202  * raw1394/libraw1394 update is complete. */
 203 int hpsb_update_config_rom(struct hpsb_host *host,
 204       const quadlet_t *new_rom, size_t size, unsigned char rom_version);
 205 int hpsb_get_config_rom(struct hpsb_host *host, quadlet_t *buffer,
 206       size_t buffersize, size_t *rom_size, unsigned char *rom_version);
 207
 208 /* Updates the configuration rom image of a host.  rom_version must be the
 209  * current version, otherwise it will fail with return value -1. If this
 210  * host does not support config-rom-update, it will return -EINVAL.
 211  * Return value 0 indicates success.
 212  */
 213 int hpsb_update_config_rom_image(struct hpsb_host *host);
 214
 215 #endif /* _IEEE1394_HOSTS_H */