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/timer.h>
   7 #include <linux/types.h>
   8 #include <linux/workqueue.h>
   9 #include <asm/atomic.h>
  10
  11 struct pci_dev;
  12 struct module;
  13
  14 #include "ieee1394_types.h"
  15 #include "csr.h"
  16
  17 struct hpsb_packet;
  18 struct hpsb_iso;
  19
  20 struct hpsb_host {
  21         struct list_head host_list;
  22
  23         void *hostdata;
  24
  25         atomic_t generation;
  26
  27         struct list_head pending_packets;
  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
  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
  56         int id;
  57         struct hpsb_host_driver *driver;
  58         struct pci_dev *pdev;
  59         struct device device;
  60         struct class_device class_dev;
  61
  62         struct delayed_work delayed_reset;
  63         unsigned config_roms:31;
  64         unsigned update_config_rom:1;
  65
  66         struct list_head addr_space;
  67         u64 low_addr_space;     /* upper bound of physical DMA area */
  68         u64 middle_addr_space;  /* upper bound of posted write area */
  69
  70         u8 speed[ALL_NODES];    /* speed between each node and local node */
  71
  72         /* per node tlabel allocation */
  73         u8 next_tl[ALL_NODES];
  74         struct { DECLARE_BITMAP(map, 64); } tl_pool[ALL_NODES];
  75
  76         struct csr_control csr;
  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,
 161                                   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,
 185                       unsigned long arg);
 186
 187         /* This function is mainly to redirect local CSR reads/locks to the iso
 188          * management registers (bus manager id, bandwidth available, channels
 189          * available) to the hardware registers in OHCI.  reg is 0,1,2,3 for bus
 190          * mgr, bwdth avail, ch avail hi, ch avail lo respectively (the same ids
 191          * as OHCI uses).  data and compare are the new data and expected data
 192          * respectively, return value is the old value.
 193          */
 194         quadlet_t (*hw_csr_reg) (struct hpsb_host *host, int reg,
 195                                  quadlet_t data, quadlet_t compare);
 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_resume_host(struct hpsb_host *host);
 202 void hpsb_remove_host(struct hpsb_host *host);
 203 int hpsb_update_config_rom_image(struct hpsb_host *host);
 204
 205 #endif /* _IEEE1394_HOSTS_H */