drivers/ieee1394/nodemgr.h

   1 /*
   2  * Copyright (C) 2000   Andreas E. Bombe
   3  *               2001   Ben Collins <bcollins@debian.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software Foundation,
  17  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18  */
  19
  20 #ifndef _IEEE1394_NODEMGR_H
  21 #define _IEEE1394_NODEMGR_H
  22
  23 #include <linux/device.h>
  24 #include <asm/types.h>
  25
  26 #include "ieee1394_core.h"
  27 #include "ieee1394_types.h"
  28
  29 struct csr1212_csr;
  30 struct csr1212_keyval;
  31 struct hpsb_host;
  32 struct ieee1394_device_id;
  33
  34 /* '1' '3' '9' '4' in ASCII */
  35 #define IEEE1394_BUSID_MAGIC    __constant_cpu_to_be32(0x31333934)
  36
  37 /* This is the start of a Node entry structure. It should be a stable API
  38  * for which to gather info from the Node Manager about devices attached
  39  * to the bus.  */
  40 struct bus_options {
  41         u8      irmc;           /* Iso Resource Manager Capable */
  42         u8      cmc;            /* Cycle Master Capable */
  43         u8      isc;            /* Iso Capable */
  44         u8      bmc;            /* Bus Master Capable */
  45         u8      pmc;            /* Power Manager Capable (PNP spec) */
  46         u8      cyc_clk_acc;    /* Cycle clock accuracy */
  47         u8      max_rom;        /* Maximum block read supported in the CSR */
  48         u8      generation;     /* Incremented when configrom changes */
  49         u8      lnkspd;         /* Link speed */
  50         u16     max_rec;        /* Maximum packet size node can receive */
  51 };
  52
  53 #define UNIT_DIRECTORY_VENDOR_ID                0x01
  54 #define UNIT_DIRECTORY_MODEL_ID                 0x02
  55 #define UNIT_DIRECTORY_SPECIFIER_ID             0x04
  56 #define UNIT_DIRECTORY_VERSION                  0x08
  57 #define UNIT_DIRECTORY_HAS_LUN_DIRECTORY        0x10
  58 #define UNIT_DIRECTORY_LUN_DIRECTORY            0x20
  59 #define UNIT_DIRECTORY_HAS_LUN                  0x40
  60
  61 /*
  62  * A unit directory corresponds to a protocol supported by the
  63  * node. If a node supports eg. IP/1394 and AV/C, its config rom has a
  64  * unit directory for each of these protocols.
  65  */
  66 struct unit_directory {
  67         struct node_entry *ne;  /* The node which this directory belongs to */
  68         octlet_t address;       /* Address of the unit directory on the node */
  69         u8 flags;               /* Indicates which entries were read */
  70
  71         quadlet_t vendor_id;
  72         struct csr1212_keyval *vendor_name_kv;
  73         const char *vendor_oui;
  74
  75         quadlet_t model_id;
  76         struct csr1212_keyval *model_name_kv;
  77         quadlet_t specifier_id;
  78         quadlet_t version;
  79
  80         unsigned int id;
  81
  82         int ignore_driver;
  83
  84         int length;             /* Number of quadlets */
  85
  86         struct device device;
  87         struct class_device class_dev;
  88
  89         struct csr1212_keyval *ud_kv;
  90         u32 lun;                /* logical unit number immediate value */
  91 };
  92
  93 struct node_entry {
  94         u64 guid;                       /* GUID of this node */
  95         u32 guid_vendor_id;             /* Top 24bits of guid */
  96         const char *guid_vendor_oui;    /* OUI name of guid vendor id */
  97
  98         struct hpsb_host *host;         /* Host this node is attached to */
  99         nodeid_t nodeid;                /* NodeID */
 100         struct bus_options busopt;      /* Bus Options */
 101         int needs_probe;
 102         unsigned int generation;        /* Synced with hpsb generation */
 103
 104         /* The following is read from the config rom */
 105         u32 vendor_id;
 106         struct csr1212_keyval *vendor_name_kv;
 107         const char *vendor_oui;
 108
 109         u32 capabilities;
 110
 111         struct device device;
 112         struct class_device class_dev;
 113
 114         /* Means this node is not attached anymore */
 115         int in_limbo;
 116
 117         struct csr1212_csr *csr;
 118 };
 119
 120 struct hpsb_protocol_driver {
 121         /* The name of the driver, e.g. SBP2 or IP1394 */
 122         const char *name;
 123
 124         /*
 125          * The device id table describing the protocols and/or devices
 126          * supported by this driver.  This is used by the nodemgr to
 127          * decide if a driver could support a given node, but the
 128          * probe function below can implement further protocol
 129          * dependent or vendor dependent checking.
 130          */
 131         struct ieee1394_device_id *id_table;
 132
 133         /*
 134          * The update function is called when the node has just
 135          * survived a bus reset, i.e. it is still present on the bus.
 136          * However, it may be necessary to reestablish the connection
 137          * or login into the node again, depending on the protocol. If the
 138          * probe fails (returns non-zero), we unbind the driver from this
 139          * device.
 140          */
 141         int (*update)(struct unit_directory *ud);
 142
 143         /* Our LDM structure */
 144         struct device_driver driver;
 145 };
 146
 147 int hpsb_register_protocol(struct hpsb_protocol_driver *driver);
 148 void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver);
 149
 150 static inline int hpsb_node_entry_valid(struct node_entry *ne)
 151 {
 152         return ne->generation == get_hpsb_generation(ne->host);
 153 }
 154
 155 /*
 156  * This will fill in the given, pre-initialised hpsb_packet with the current
 157  * information from the node entry (host, node ID, generation number).  It will
 158  * return false if the node owning the GUID is not accessible (and not modify
 159  * the hpsb_packet) and return true otherwise.
 160  *
 161  * Note that packet sending may still fail in hpsb_send_packet if a bus reset
 162  * happens while you are trying to set up the packet (due to obsolete generation
 163  * number).  It will at least reliably fail so that you don't accidentally and
 164  * unknowingly send your packet to the wrong node.
 165  */
 166 void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *pkt);
 167
 168 int hpsb_node_read(struct node_entry *ne, u64 addr,
 169                    quadlet_t *buffer, size_t length);
 170 int hpsb_node_write(struct node_entry *ne, u64 addr,
 171                     quadlet_t *buffer, size_t length);
 172 int hpsb_node_lock(struct node_entry *ne, u64 addr,
 173                    int extcode, quadlet_t *data, quadlet_t arg);
 174
 175 /* Iterate the hosts, calling a given function with supplied data for each
 176  * host. */
 177 int nodemgr_for_each_host(void *__data, int (*cb)(struct hpsb_host *, void *));
 178
 179 int init_ieee1394_nodemgr(void);
 180 void cleanup_ieee1394_nodemgr(void);
 181
 182 /* The template for a host device */
 183 extern struct device nodemgr_dev_template_host;
 184
 185 /* Bus attributes we export */
 186 extern struct bus_attribute *const fw_bus_attrs[];
 187
 188 #endif /* _IEEE1394_NODEMGR_H */