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 */
187
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