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/system.h>
  25 #include <asm/types.h>
  26
  27 #include "ieee1394_core.h"
  28 #include "ieee1394_transactions.h"
  29 #include "ieee1394_types.h"
  30
  31 struct csr1212_csr;
  32 struct csr1212_keyval;
  33 struct hpsb_host;
  34 struct ieee1394_device_id;
  35
  36 /* This is the start of a Node entry structure. It should be a stable API
  37  * for which to gather info from the Node Manager about devices attached
  38  * to the bus.  */
  39 struct bus_options {
  40         u8      irmc;           /* Iso Resource Manager Capable */
  41         u8      cmc;            /* Cycle Master Capable */
  42         u8      isc;            /* Iso Capable */
  43         u8      bmc;            /* Bus Master Capable */
  44         u8      pmc;            /* Power Manager Capable (PNP spec) */
  45         u8      cyc_clk_acc;    /* Cycle clock accuracy */
  46         u8      max_rom;        /* Maximum block read supported in the CSR */
  47         u8      generation;     /* Incremented when configrom changes */
  48         u8      lnkspd;         /* Link speed */
  49         u16     max_rec;        /* Maximum packet size node can receive */
  50 };
  51
  52 #define UNIT_DIRECTORY_VENDOR_ID                0x01
  53 #define UNIT_DIRECTORY_MODEL_ID                 0x02
  54 #define UNIT_DIRECTORY_SPECIFIER_ID             0x04
  55 #define UNIT_DIRECTORY_VERSION                  0x08
  56 #define UNIT_DIRECTORY_HAS_LUN_DIRECTORY        0x10
  57 #define UNIT_DIRECTORY_LUN_DIRECTORY            0x20
  58 #define UNIT_DIRECTORY_HAS_LUN                  0x40
  59
  60 /*
  61  * A unit directory corresponds to a protocol supported by the
  62  * node. If a node supports eg. IP/1394 and AV/C, its config rom has a
  63  * unit directory for each of these protocols.
  64  */
  65 struct unit_directory {
  66         struct node_entry *ne;  /* The node which this directory belongs to */
  67         octlet_t address;       /* Address of the unit directory on the node */
  68         u8 flags;               /* Indicates which entries were read */
  69
  70         quadlet_t vendor_id;
  71         struct csr1212_keyval *vendor_name_kv;
  72
  73         quadlet_t model_id;
  74         struct csr1212_keyval *model_name_kv;
  75         quadlet_t specifier_id;
  76         quadlet_t version;
  77         quadlet_t directory_id;
  78
  79         unsigned int id;
  80
  81         int ignore_driver;
  82
  83         int length;             /* Number of quadlets */
  84
  85         struct device device;
  86         struct device unit_dev;
  87
  88         struct csr1212_keyval *ud_kv;
  89         u32 lun;                /* logical unit number immediate value */
  90 };
  91
  92 struct node_entry {
  93         u64 guid;                       /* GUID of this node */
  94         u32 guid_vendor_id;             /* Top 24bits of guid */
  95
  96         struct hpsb_host *host;         /* Host this node is attached to */
  97         nodeid_t nodeid;                /* NodeID */
  98         struct bus_options busopt;      /* Bus Options */
  99         bool needs_probe;
 100         unsigned int generation;        /* Synced with hpsb generation */
 101
 102         /* The following is read from the config rom */
 103         u32 vendor_id;
 104         struct csr1212_keyval *vendor_name_kv;
 105
 106         u32 capabilities;
 107
 108         struct device device;
 109         struct device node_dev;
 110
 111         /* Means this node is not attached anymore */
 112         bool in_limbo;
 113
 114         struct csr1212_csr *csr;
 115 };
 116
 117 struct hpsb_protocol_driver {
 118         /* The name of the driver, e.g. SBP2 or IP1394 */
 119         const char *name;
 120
 121         /*
 122          * The device id table describing the protocols and/or devices
 123          * supported by this driver.  This is used by the nodemgr to
 124          * decide if a driver could support a given node, but the
 125          * probe function below can implement further protocol
 126          * dependent or vendor dependent checking.
 127          */
 128         const struct ieee1394_device_id *id_table;
 129
 130         /*
 131          * The update function is called when the node has just
 132          * survived a bus reset, i.e. it is still present on the bus.
 133          * However, it may be necessary to reestablish the connection
 134          * or login into the node again, depending on the protocol. If the
 135          * probe fails (returns non-zero), we unbind the driver from this
 136          * device.
 137          */
 138         int (*update)(struct unit_directory *ud);
 139
 140         /* Our LDM structure */
 141         struct device_driver driver;
 142 };
 143
 144 int __hpsb_register_protocol(struct hpsb_protocol_driver *, struct module *);
 145 static inline int hpsb_register_protocol(struct hpsb_protocol_driver *driver)
 146 {
 147         return __hpsb_register_protocol(driver, THIS_MODULE);
 148 }
 149
 150 void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver);
 151
 152 static inline int hpsb_node_entry_valid(struct node_entry *ne)
 153 {
 154         return ne->generation == get_hpsb_generation(ne->host);
 155 }
 156 void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *packet);
 157 int hpsb_node_write(struct node_entry *ne, u64 addr,
 158                     quadlet_t *buffer, size_t length);
 159 static inline int hpsb_node_read(struct node_entry *ne, u64 addr,
 160                                  quadlet_t *buffer, size_t length)
 161 {
 162         unsigned int g = ne->generation;
 163
 164         smp_rmb();
 165         return hpsb_read(ne->host, ne->nodeid, g, addr, buffer, length);
 166 }
 167 static inline int hpsb_node_lock(struct node_entry *ne, u64 addr, int extcode,
 168                                  quadlet_t *buffer, quadlet_t arg)
 169 {
 170         unsigned int g = ne->generation;
 171
 172         smp_rmb();
 173         return hpsb_lock(ne->host, ne->nodeid, g, addr, extcode, buffer, arg);
 174 }
 175 int nodemgr_for_each_host(void *data, int (*cb)(struct hpsb_host *, void *));
 176
 177 int init_ieee1394_nodemgr(void);
 178 void cleanup_ieee1394_nodemgr(void);
 179
 180 /* The template for a host device */
 181 extern struct device nodemgr_dev_template_host;
 182
 183 /* Bus attributes we export */
 184 extern struct bus_attribute *const fw_bus_attrs[];
 185
 186 #endif /* _IEEE1394_NODEMGR_H */