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
  39         nodeid_t node_id;    /* node ID of this host */
  40         nodeid_t irm_id;     /* ID of this bus' isochronous resource manager */
  41         nodeid_t busmgr_id;  /* ID of this bus' bus manager */
  42
  43         /* this nodes state */
  44         unsigned in_bus_reset:1;
  45         unsigned is_shutdown:1;
  46         unsigned resume_packet_sent:1;
  47
  48         /* this nodes' duties on the bus */
  49         unsigned is_root:1;
  50         unsigned is_cycmst:1;
  51         unsigned is_irm:1;
  52         unsigned is_busmgr:1;
  53
  54         int reset_retries;
  55         quadlet_t *topology_map;
  56         u8 *speed_map;
  57
  58         int id;
  59         struct hpsb_host_driver *driver;
  60         struct pci_dev *pdev;
  61         struct device device;
  62         struct class_device class_dev;
  63
  64         int update_config_rom;
  65         struct delayed_work delayed_reset;
  66         unsigned int config_roms;
  67
  68         struct list_head addr_space;
  69         u64 low_addr_space;     /* upper bound of physical DMA area */
  70         u64 middle_addr_space;  /* upper bound of posted write area */
  71
  72         u8 speed[ALL_NODES];    /* speed between each node and local node */
  73
  74         /* per node tlabel allocation */
  75         u8 next_tl[ALL_NODES];
  76         struct { DECLARE_BITMAP(map, 64); } tl_pool[ALL_NODES];
  77
  78         struct csr_control csr;
  79 };
  80
  81 enum devctl_cmd {
  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. */
  85         RESET_BUS,
  86
  87         /* Arg is void, return value is the hardware cycle counter value. */
  88         GET_CYCLE_COUNTER,
  89
  90         /* Set the hardware cycle counter to the value in arg, return void.
  91          * FIXME - setting is probably not required. */
  92         SET_CYCLE_COUNTER,
  93
  94         /* Configure hardware for new bus ID in arg, return void. */
  95         SET_BUS_ID,
  96
  97         /* If arg true, start sending cycle start packets, stop if arg == 0.
  98          * Return void. */
  99         ACT_CYCLE_MASTER,
 100
 101         /* Cancel all outstanding async requests without resetting the bus.
 102          * Return void. */
 103         CANCEL_REQUESTS,
 104
 105         /* Start or stop receiving isochronous channel in arg.  Return void.
 106          * This acts as an optimization hint, hosts are not required not to
 107          * listen on unrequested channels. */
 108         ISO_LISTEN_CHANNEL,
 109         ISO_UNLISTEN_CHANNEL
 110 };
 111
 112 enum isoctl_cmd {
 113         /* rawiso API - see iso.h for the meanings of these commands
 114          * (they correspond exactly to the hpsb_iso_* API functions)
 115          * INIT = allocate resources
 116          * START = begin transmission/reception
 117          * STOP = halt transmission/reception
 118          * QUEUE/RELEASE = produce/consume packets
 119          * SHUTDOWN = deallocate resources
 120          */
 121
 122         XMIT_INIT,
 123         XMIT_START,
 124         XMIT_STOP,
 125         XMIT_QUEUE,
 126         XMIT_SHUTDOWN,
 127
 128         RECV_INIT,
 129         RECV_LISTEN_CHANNEL,   /* multi-channel only */
 130         RECV_UNLISTEN_CHANNEL, /* multi-channel only */
 131         RECV_SET_CHANNEL_MASK, /* multi-channel only; arg is a *u64 */
 132         RECV_START,
 133         RECV_STOP,
 134         RECV_RELEASE,
 135         RECV_SHUTDOWN,
 136         RECV_FLUSH
 137 };
 138
 139 enum reset_types {
 140         /* 166 microsecond reset -- only type of reset available on
 141            non-1394a capable controllers */
 142         LONG_RESET,
 143
 144         /* Short (arbitrated) reset -- only available on 1394a capable
 145            controllers */
 146         SHORT_RESET,
 147
 148         /* Variants that set force_root before issueing the bus reset */
 149         LONG_RESET_FORCE_ROOT, SHORT_RESET_FORCE_ROOT,
 150
 151         /* Variants that clear force_root before issueing the bus reset */
 152         LONG_RESET_NO_FORCE_ROOT, SHORT_RESET_NO_FORCE_ROOT
 153 };
 154
 155 struct hpsb_host_driver {
 156         struct module *owner;
 157         const char *name;
 158
 159         /* The hardware driver may optionally support a function that is used
 160          * to set the hardware ConfigROM if the hardware supports handling
 161          * reads to the ConfigROM on its own. */
 162         void (*set_hw_config_rom)(struct hpsb_host *host,
 163                                   quadlet_t *config_rom);
 164
 165         /* This function shall implement packet transmission based on
 166          * packet->type.  It shall CRC both parts of the packet (unless
 167          * packet->type == raw) and do byte-swapping as necessary or instruct
 168          * the hardware to do so.  It can return immediately after the packet
 169          * was queued for sending.  After sending, hpsb_sent_packet() has to be
 170          * called.  Return 0 on success, negative errno on failure.
 171          * NOTE: The function must be callable in interrupt context.
 172          */
 173         int (*transmit_packet)(struct hpsb_host *host,
 174                                struct hpsb_packet *packet);
 175
 176         /* This function requests miscellanous services from the driver, see
 177          * above for command codes and expected actions.  Return -1 for unknown
 178          * command, though that should never happen.
 179          */
 180         int (*devctl)(struct hpsb_host *host, enum devctl_cmd command, int arg);
 181
 182          /* ISO transmission/reception functions. Return 0 on success, -1
 183           * (or -EXXX errno code) on failure. If the low-level driver does not
 184           * support the new ISO API, set isoctl to NULL.
 185           */
 186         int (*isoctl)(struct hpsb_iso *iso, enum isoctl_cmd command,
 187                       unsigned long arg);
 188
 189         /* This function is mainly to redirect local CSR reads/locks to the iso
 190          * management registers (bus manager id, bandwidth available, channels
 191          * available) to the hardware registers in OHCI.  reg is 0,1,2,3 for bus
 192          * mgr, bwdth avail, ch avail hi, ch avail lo respectively (the same ids
 193          * as OHCI uses).  data and compare are the new data and expected data
 194          * respectively, return value is the old value.
 195          */
 196         quadlet_t (*hw_csr_reg) (struct hpsb_host *host, int reg,
 197                                  quadlet_t data, quadlet_t compare);
 198 };
 199
 200 struct hpsb_host *hpsb_alloc_host(struct hpsb_host_driver *drv, size_t extra,
 201                                   struct device *dev);
 202 int hpsb_add_host(struct hpsb_host *host);
 203 void hpsb_remove_host(struct hpsb_host *h);
 204
 205 /* Updates the configuration rom image of a host.  rom_version must be the
 206  * current version, otherwise it will fail with return value -1. If this
 207  * host does not support config-rom-update, it will return -EINVAL.
 208  * Return value 0 indicates success.
 209  */
 210 int hpsb_update_config_rom_image(struct hpsb_host *host);
 211
 212 #endif /* _IEEE1394_HOSTS_H */