xref: /linux/drivers/target/sbp/sbp_target.h (revision 93d90ad708b8da6efc0e487b66111aa9db7f70c7) 
1 #ifndef _SBP_BASE_H
2 #define _SBP_BASE_H
3 
4 #include <linux/firewire.h>
5 #include <linux/spinlock.h>
6 #include <linux/types.h>
7 #include <linux/workqueue.h>
8 #include <target/target_core_base.h>
9 
10 #define SBP_VERSION  "v0.1"
11 #define SBP_NAMELEN 32
12 
13 #define SBP_ORB_FETCH_SIZE	8
14 
15 #define MANAGEMENT_AGENT_STATE_IDLE	0
16 #define MANAGEMENT_AGENT_STATE_BUSY	1
17 
18 #define ORB_NOTIFY(v)			(((v) >> 31) & 0x01)
19 #define ORB_REQUEST_FORMAT(v)		(((v) >> 29) & 0x03)
20 
21 #define MANAGEMENT_ORB_FUNCTION(v)	(((v) >> 16) & 0x0f)
22 
23 #define MANAGEMENT_ORB_FUNCTION_LOGIN			0x0
24 #define MANAGEMENT_ORB_FUNCTION_QUERY_LOGINS		0x1
25 #define MANAGEMENT_ORB_FUNCTION_RECONNECT		0x3
26 #define MANAGEMENT_ORB_FUNCTION_SET_PASSWORD		0x4
27 #define MANAGEMENT_ORB_FUNCTION_LOGOUT			0x7
28 #define MANAGEMENT_ORB_FUNCTION_ABORT_TASK		0xb
29 #define MANAGEMENT_ORB_FUNCTION_ABORT_TASK_SET		0xc
30 #define MANAGEMENT_ORB_FUNCTION_LOGICAL_UNIT_RESET	0xe
31 #define MANAGEMENT_ORB_FUNCTION_TARGET_RESET		0xf
32 
33 #define LOGIN_ORB_EXCLUSIVE(v)		(((v) >> 28) &   0x01)
34 #define LOGIN_ORB_RESERVED(v)		(((v) >> 24) &   0x0f)
35 #define LOGIN_ORB_RECONNECT(v)		(((v) >> 20) &   0x0f)
36 #define LOGIN_ORB_LUN(v)		(((v) >>  0) & 0xffff)
37 #define LOGIN_ORB_PASSWORD_LENGTH(v)	(((v) >> 16) & 0xffff)
38 #define LOGIN_ORB_RESPONSE_LENGTH(v)	(((v) >>  0) & 0xffff)
39 
40 #define RECONNECT_ORB_LOGIN_ID(v)	(((v) >>  0) & 0xffff)
41 #define LOGOUT_ORB_LOGIN_ID(v)		(((v) >>  0) & 0xffff)
42 
43 #define CMDBLK_ORB_DIRECTION(v)		(((v) >> 27) &   0x01)
44 #define CMDBLK_ORB_SPEED(v)		(((v) >> 24) &   0x07)
45 #define CMDBLK_ORB_MAX_PAYLOAD(v)	(((v) >> 20) &   0x0f)
46 #define CMDBLK_ORB_PG_TBL_PRESENT(v)	(((v) >> 19) &   0x01)
47 #define CMDBLK_ORB_PG_SIZE(v)		(((v) >> 16) &   0x07)
48 #define CMDBLK_ORB_DATA_SIZE(v)		(((v) >>  0) & 0xffff)
49 
50 #define STATUS_BLOCK_SRC(v)		(((v) &   0x03) << 30)
51 #define STATUS_BLOCK_RESP(v)		(((v) &   0x03) << 28)
52 #define STATUS_BLOCK_DEAD(v)		(((v) ? 1 : 0)  << 27)
53 #define STATUS_BLOCK_LEN(v)		(((v) &   0x07) << 24)
54 #define STATUS_BLOCK_SBP_STATUS(v)	(((v) &   0xff) << 16)
55 #define STATUS_BLOCK_ORB_OFFSET_HIGH(v)	(((v) & 0xffff) <<  0)
56 
57 #define STATUS_SRC_ORB_CONTINUING	0
58 #define STATUS_SRC_ORB_FINISHED		1
59 #define STATUS_SRC_UNSOLICITED		2
60 
61 #define STATUS_RESP_REQUEST_COMPLETE	0
62 #define STATUS_RESP_TRANSPORT_FAILURE	1
63 #define STATUS_RESP_ILLEGAL_REQUEST	2
64 #define STATUS_RESP_VENDOR_DEPENDENT	3
65 
66 #define SBP_STATUS_OK			0
67 #define SBP_STATUS_REQ_TYPE_NOTSUPP	1
68 #define SBP_STATUS_SPEED_NOTSUPP	2
69 #define SBP_STATUS_PAGE_SIZE_NOTSUPP	3
70 #define SBP_STATUS_ACCESS_DENIED	4
71 #define SBP_STATUS_LUN_NOTSUPP		5
72 #define SBP_STATUS_PAYLOAD_TOO_SMALL	6
73 /* 7 is reserved */
74 #define SBP_STATUS_RESOURCES_UNAVAIL	8
75 #define SBP_STATUS_FUNCTION_REJECTED	9
76 #define SBP_STATUS_LOGIN_ID_UNKNOWN	10
77 #define SBP_STATUS_DUMMY_ORB_COMPLETE	11
78 #define SBP_STATUS_REQUEST_ABORTED	12
79 #define SBP_STATUS_UNSPECIFIED_ERROR	0xff
80 
81 #define AGENT_STATE_RESET	0
82 #define AGENT_STATE_ACTIVE	1
83 #define AGENT_STATE_SUSPENDED	2
84 #define AGENT_STATE_DEAD	3
85 
86 struct sbp2_pointer {
87 	__be32 high;
88 	__be32 low;
89 };
90 
91 struct sbp_command_block_orb {
92 	struct sbp2_pointer next_orb;
93 	struct sbp2_pointer data_descriptor;
94 	__be32 misc;
95 	u8 command_block[12];
96 };
97 
98 struct sbp_page_table_entry {
99 	__be16 segment_length;
100 	__be16 segment_base_hi;
101 	__be32 segment_base_lo;
102 };
103 
104 struct sbp_management_orb {
105 	struct sbp2_pointer ptr1;
106 	struct sbp2_pointer ptr2;
107 	__be32 misc;
108 	__be32 length;
109 	struct sbp2_pointer status_fifo;
110 };
111 
112 struct sbp_status_block {
113 	__be32 status;
114 	__be32 orb_low;
115 	u8 data[24];
116 };
117 
118 struct sbp_login_response_block {
119 	__be32 misc;
120 	struct sbp2_pointer command_block_agent;
121 	__be32 reconnect_hold;
122 };
123 
124 struct sbp_login_descriptor {
125 	struct sbp_session *sess;
126 	struct list_head link;
127 
128 	struct se_lun *lun;
129 
130 	u64 status_fifo_addr;
131 	int exclusive;
132 	u16 login_id;
133 
134 	struct sbp_target_agent *tgt_agt;
135 };
136 
137 struct sbp_session {
138 	spinlock_t lock;
139 	struct se_session *se_sess;
140 	struct list_head login_list;
141 	struct delayed_work maint_work;
142 
143 	u64 guid; /* login_owner_EUI_64 */
144 	int node_id; /* login_owner_ID */
145 
146 	struct fw_card *card;
147 	int generation;
148 	int speed;
149 
150 	int reconnect_hold;
151 	u64 reconnect_expires;
152 };
153 
154 struct sbp_nacl {
155 	/* Initiator EUI-64 */
156 	u64 guid;
157 	/* ASCII formatted GUID for SBP Initiator port */
158 	char iport_name[SBP_NAMELEN];
159 	/* Returned by sbp_make_nodeacl() */
160 	struct se_node_acl se_node_acl;
161 };
162 
163 struct sbp_tpg {
164 	/* Target portal group tag for TCM */
165 	u16 tport_tpgt;
166 	/* Pointer back to sbp_tport */
167 	struct sbp_tport *tport;
168 	/* Returned by sbp_make_tpg() */
169 	struct se_portal_group se_tpg;
170 };
171 
172 struct sbp_tport {
173 	/* Target Unit Identifier (EUI-64) */
174 	u64 guid;
175 	/* Target port name */
176 	char tport_name[SBP_NAMELEN];
177 	/* Returned by sbp_make_tport() */
178 	struct se_wwn tport_wwn;
179 
180 	struct sbp_tpg *tpg;
181 
182 	/* FireWire unit directory */
183 	struct fw_descriptor unit_directory;
184 
185 	/* SBP Management Agent */
186 	struct sbp_management_agent *mgt_agt;
187 
188 	/* Parameters */
189 	int enable;
190 	s32 directory_id;
191 	int mgt_orb_timeout;
192 	int max_reconnect_timeout;
193 	int max_logins_per_lun;
194 };
195 
196 static inline u64 sbp2_pointer_to_addr(const struct sbp2_pointer *ptr)
197 {
198 	return (u64)(be32_to_cpu(ptr->high) & 0x0000ffff) << 32 |
199 		(be32_to_cpu(ptr->low) & 0xfffffffc);
200 }
201 
202 static inline void addr_to_sbp2_pointer(u64 addr, struct sbp2_pointer *ptr)
203 {
204 	ptr->high = cpu_to_be32(addr >> 32);
205 	ptr->low = cpu_to_be32(addr);
206 }
207 
208 struct sbp_target_agent {
209 	spinlock_t lock;
210 	struct fw_address_handler handler;
211 	struct sbp_login_descriptor *login;
212 	int state;
213 	struct work_struct work;
214 	u64 orb_pointer;
215 	bool doorbell;
216 };
217 
218 struct sbp_target_request {
219 	struct sbp_login_descriptor *login;
220 	u64 orb_pointer;
221 	struct sbp_command_block_orb orb;
222 	struct sbp_status_block status;
223 	struct work_struct work;
224 
225 	struct se_cmd se_cmd;
226 	struct sbp_page_table_entry *pg_tbl;
227 	void *cmd_buf;
228 
229 	unsigned char sense_buf[TRANSPORT_SENSE_BUFFER];
230 };
231 
232 struct sbp_management_agent {
233 	spinlock_t lock;
234 	struct sbp_tport *tport;
235 	struct fw_address_handler handler;
236 	int state;
237 	struct work_struct work;
238 	u64 orb_offset;
239 	struct sbp_management_request *request;
240 };
241 
242 struct sbp_management_request {
243 	struct sbp_management_orb orb;
244 	struct sbp_status_block status;
245 	struct fw_card *card;
246 	int generation;
247 	int node_addr;
248 	int speed;
249 };
250 
251 #endif
252