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