drivers/ieee1394/hosts.h

   1 #ifndef _IEEE1394_HOSTS_H
   2 #define _IEEE1394_HOSTS_H
   3
   4 #include <linux/device.h>
   5 #include <linux/list.h>
   6 #include <linux/skbuff.h>
   7 #include <linux/timer.h>
   8 #include <linux/types.h>
   9 #include <linux/workqueue.h>
  10 #include <asm/atomic.h>
  11
  12 struct pci_dev;
  13 struct module;
  14
  15 #include "ieee1394_types.h"
  16 #include "csr.h"
  17
  18 struct hpsb_packet;
  19 struct hpsb_iso;
  20
  21 struct hpsb_host {
  22         struct list_head host_list;
  23
  24         void *hostdata;
  25
  26         atomic_t generation;
  27
  28         struct sk_buff_head pending_packet_queue;
  29
  30         struct timer_list timeout;
  31         unsigned long timeout_interval;
  32
  33         unsigned char iso_listen_count[64];
  34
  35         int node_count;      /* number of identified nodes on this bus */
  36         int selfid_count;    /* total number of SelfIDs received */
  37         int nodes_active;    /* number of nodes with active link layer */
  38         u8 speed[ALL_NODES]; /* speed between each node and local node */
  39
  40         nodeid_t node_id;    /* node ID of this host */
  41         nodeid_t irm_id;     /* ID of this bus' isochronous resource manager */
  42         nodeid_t busmgr_id;  /* ID of this bus' bus manager */
  43
  44         /* this nodes state */
  45         unsigned in_bus_reset:1;
  46         unsigned is_shutdown:1;
  47         unsigned resume_packet_sent:1;
  48
  49         /* this nodes' duties on the bus */
  50         unsigned is_root:1;
  51         unsigned is_cycmst:1;
  52         unsigned is_irm:1;
  53         unsigned is_busmgr:1;
  54
  55         int reset_retries;
  56         quadlet_t *topology_map;
  57         u8 *speed_map;
  58         struct csr_control csr;
  59
  60         /* Per node tlabel pool allocation */
  61         struct hpsb_tlabel_pool tpool[ALL_NODES];
  62
  63         struct hpsb_host_driver *driver;
  64
  65         struct pci_dev *pdev;
  66
  67         int id;
  68
  69         struct device device;
  70         struct class_device class_dev;
  71
  72         int update_config_rom;
  73         struct work_struct delayed_reset;
  74
  75         unsigned int config_roms;
  76
  77         struct list_head addr_space;
  78         u64 low_addr_space;     /* upper bound of physical DMA area */
  79         u64 middle_addr_space;  /* upper bound of posted write area */
  80 };
  81
  82
  83
  84 enum devctl_cmd {
  85         /* Host is requested to reset its bus and cancel all outstanding async
  86          * requests.  If arg == 1, it shall also attempt to become root on the
  87          * bus.  Return void. */
  88         RESET_BUS,
  89
  90         /* Arg is void, return value is the hardware cycle counter value. */
  91         GET_CYCLE_COUNTER,
  92
  93         /* Set the hardware cycle counter to the value in arg, return void.
  94          * FIXME - setting is probably not required. */
  95         SET_CYCLE_COUNTER,
  96
  97         /* Configure hardware for new bus ID in arg, return void. */
  98         SET_BUS_ID,
  99
 100         /* If arg true, start sending cycle start packets, stop if arg == 0.
 101          * Return void. */
 102         ACT_CYCLE_MASTER,
 103
 104         /* Cancel all outstanding async requests without resetting the bus.
 105          * Return void. */
 106         CANCEL_REQUESTS,
 107
 108         /* Start or stop receiving isochronous channel in arg.  Return void.
 109          * This acts as an optimization hint, hosts are not required not to
 110          * listen on unrequested channels. */
 111         ISO_LISTEN_CHANNEL,
 112         ISO_UNLISTEN_CHANNEL
 113 };
 114
 115 enum isoctl_cmd {
 116         /* rawiso API - see iso.h for the meanings of these commands
 117          * (they correspond exactly to the hpsb_iso_* API functions)
 118          * INIT = allocate resources
 119          * START = begin transmission/reception
 120          * STOP = halt transmission/reception
 121          * QUEUE/RELEASE = produce/consume packets
 122          * SHUTDOWN = deallocate resources
 123          */
 124
 125         XMIT_INIT,
 126         XMIT_START,
 127         XMIT_STOP,
 128         XMIT_QUEUE,
 129         XMIT_SHUTDOWN,
 130
 131         RECV_INIT,
 132         RECV_LISTEN_CHANNEL,   /* multi-channel only */
 133         RECV_UNLISTEN_CHANNEL, /* multi-channel only */
 134         RECV_SET_CHANNEL_MASK, /* multi-channel only; arg is a *u64 */
 135         RECV_START,
 136         RECV_STOP,
 137         RECV_RELEASE,
 138         RECV_SHUTDOWN,
 139         RECV_FLUSH
 140 };
 141
 142 enum reset_types {
 143         /* 166 microsecond reset -- only type of reset available on
 144            non-1394a capable controllers */
 145         LONG_RESET,
 146
 147         /* Short (arbitrated) reset -- only available on 1394a capable
 148            controllers */
 149         SHORT_RESET,
 150
 151         /* Variants that set force_root before issueing the bus reset */
 152         LONG_RESET_FORCE_ROOT, SHORT_RESET_FORCE_ROOT,
 153
 154         /* Variants that clear force_root before issueing the bus reset */
 155         LONG_RESET_NO_FORCE_ROOT, SHORT_RESET_NO_FORCE_ROOT
 156 };
 157
 158 struct hpsb_host_driver {
 159         struct module *owner;
 160         const char *name;
 161
 162         /* The hardware driver may optionally support a function that is used
 163          * to set the hardware ConfigROM if the hardware supports handling
 164          * reads to the ConfigROM on its own. */
 165         void (*set_hw_config_rom)(struct hpsb_host *host,
 166                                   quadlet_t *config_rom);
 167
 168         /* This function shall implement packet transmission based on
 169          * packet->type.  It shall CRC both parts of the packet (unless
 170          * packet->type == raw) and do byte-swapping as necessary or instruct
 171          * the hardware to do so.  It can return immediately after the packet
 172          * was queued for sending.  After sending, hpsb_sent_packet() has to be
 173          * called.  Return 0 on success, negative errno on failure.
 174          * NOTE: The function must be callable in interrupt context.
 175          */
 176         int (*transmit_packet)(struct hpsb_host *host,
 177                                struct hpsb_packet *packet);
 178
 179         /* This function requests miscellanous services from the driver, see
 180          * above for command codes and expected actions.  Return -1 for unknown
 181          * command, though that should never happen.
 182          */
 183         int (*devctl)(struct hpsb_host *host, enum devctl_cmd command, int arg);
 184
 185          /* ISO transmission/reception functions. Return 0 on success, -1
 186           * (or -EXXX errno code) on failure. If the low-level driver does not
 187           * support the new ISO API, set isoctl to NULL.
 188           */
 189         int (*isoctl)(struct hpsb_iso *iso, enum isoctl_cmd command,
 190                       unsigned long arg);
 191
 192         /* This function is mainly to redirect local CSR reads/locks to the iso
 193          * management registers (bus manager id, bandwidth available, channels
 194          * available) to the hardware registers in OHCI.  reg is 0,1,2,3 for bus
 195          * mgr, bwdth avail, ch avail hi, ch avail lo respectively (the same ids
 196          * as OHCI uses).  data and compare are the new data and expected data
 197          * respectively, return value is the old value.
 198          */
 199         quadlet_t (*hw_csr_reg) (struct hpsb_host *host, int reg,
 200                                  quadlet_t data, quadlet_t compare);
 201 };
 202
 203 struct hpsb_host *hpsb_alloc_host(struct hpsb_host_driver *drv, size_t extra,
 204                                   struct device *dev);
 205 int hpsb_add_host(struct hpsb_host *host);
 206 void hpsb_remove_host(struct hpsb_host *h);
 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 */