4 * Global definitions for the zfcp device driver.
6 * Copyright IBM Corporation 2002, 2010
12 /*************************** INCLUDES *****************************************/
14 #include <linux/init.h>
15 #include <linux/moduleparam.h>
16 #include <linux/major.h>
17 #include <linux/blkdev.h>
18 #include <linux/delay.h>
19 #include <linux/timer.h>
20 #include <linux/slab.h>
21 #include <linux/mempool.h>
22 #include <linux/syscalls.h>
23 #include <linux/scatterlist.h>
24 #include <linux/ioctl.h>
25 #include <scsi/fc/fc_fs.h>
26 #include <scsi/fc/fc_gs.h>
27 #include <scsi/scsi.h>
28 #include <scsi/scsi_tcq.h>
29 #include <scsi/scsi_cmnd.h>
30 #include <scsi/scsi_device.h>
31 #include <scsi/scsi_host.h>
32 #include <scsi/scsi_transport.h>
33 #include <scsi/scsi_transport_fc.h>
34 #include <scsi/scsi_bsg_fc.h>
35 #include <asm/ccwdev.h>
36 #include <asm/debug.h>
37 #include <asm/ebcdic.h>
38 #include <asm/sysinfo.h>
41 #include "zfcp_qdio.h"
45 /********************* SCSI SPECIFIC DEFINES *********************************/
46 #define ZFCP_SCSI_ER_TIMEOUT (10*HZ)
48 /********************* FSF SPECIFIC DEFINES *********************************/
50 /* ATTENTION: value must not be used by hardware */
51 #define FSF_QTCB_UNSOLICITED_STATUS 0x6305
53 /* timeout value for "default timer" for fsf requests */
54 #define ZFCP_FSF_REQUEST_TIMEOUT (60*HZ)
56 /*************** ADAPTER/PORT/UNIT AND FSF_REQ STATUS FLAGS ******************/
59 * Note, the leftmost status byte is common among adapter, port
62 #define ZFCP_COMMON_FLAGS 0xfff00000
64 /* common status bits */
65 #define ZFCP_STATUS_COMMON_RUNNING 0x40000000
66 #define ZFCP_STATUS_COMMON_ERP_FAILED 0x20000000
67 #define ZFCP_STATUS_COMMON_UNBLOCKED 0x10000000
68 #define ZFCP_STATUS_COMMON_OPEN 0x04000000
69 #define ZFCP_STATUS_COMMON_ERP_INUSE 0x01000000
70 #define ZFCP_STATUS_COMMON_ACCESS_DENIED 0x00800000
71 #define ZFCP_STATUS_COMMON_ACCESS_BOXED 0x00400000
72 #define ZFCP_STATUS_COMMON_NOESC 0x00200000
75 #define ZFCP_STATUS_ADAPTER_QDIOUP 0x00000002
76 #define ZFCP_STATUS_ADAPTER_SIOSL_ISSUED 0x00000004
77 #define ZFCP_STATUS_ADAPTER_XCONFIG_OK 0x00000008
78 #define ZFCP_STATUS_ADAPTER_HOST_CON_INIT 0x00000010
79 #define ZFCP_STATUS_ADAPTER_ERP_PENDING 0x00000100
80 #define ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED 0x00000200
81 #define ZFCP_STATUS_ADAPTER_DATA_DIV_ENABLED 0x00000400
83 /* remote port status */
84 #define ZFCP_STATUS_PORT_PHYS_OPEN 0x00000001
85 #define ZFCP_STATUS_PORT_LINK_TEST 0x00000002
87 /* logical unit status */
88 #define ZFCP_STATUS_LUN_SHARED 0x00000004
89 #define ZFCP_STATUS_LUN_READONLY 0x00000008
91 /* FSF request status (this does not have a common part) */
92 #define ZFCP_STATUS_FSFREQ_ERROR 0x00000008
93 #define ZFCP_STATUS_FSFREQ_CLEANUP 0x00000010
94 #define ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED 0x00000040
95 #define ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED 0x00000080
96 #define ZFCP_STATUS_FSFREQ_TMFUNCFAILED 0x00000200
97 #define ZFCP_STATUS_FSFREQ_DISMISSED 0x00001000
99 /************************* STRUCTURE DEFINITIONS *****************************/
103 /* holds various memory pools of an adapter */
104 struct zfcp_adapter_mempool
{
106 mempool_t
*gid_pn_req
;
108 mempool_t
*scsi_abort
;
109 mempool_t
*status_read_req
;
112 mempool_t
*qtcb_pool
;
115 struct zfcp_erp_action
{
116 struct list_head list
;
117 int action
; /* requested action code */
118 struct zfcp_adapter
*adapter
; /* device which should be recovered */
119 struct zfcp_port
*port
;
120 struct scsi_device
*sdev
;
121 u32 status
; /* recovery status */
122 u32 step
; /* active step of this erp action */
123 unsigned long fsf_req_id
;
124 struct timer_list timer
;
127 struct fsf_latency_record
{
133 struct latency_cont
{
134 struct fsf_latency_record channel
;
135 struct fsf_latency_record fabric
;
139 struct zfcp_latencies
{
140 struct latency_cont read
;
141 struct latency_cont write
;
142 struct latency_cont cmd
;
146 struct zfcp_adapter
{
148 u64 peer_wwnn
; /* P2P peer WWNN */
149 u64 peer_wwpn
; /* P2P peer WWPN */
150 u32 peer_d_id
; /* P2P peer D_ID */
151 struct ccw_device
*ccw_device
; /* S/390 ccw device */
152 struct zfcp_qdio
*qdio
;
153 u32 hydra_version
; /* Hydra version */
155 u32 adapter_features
; /* FCP channel features */
156 u32 connection_features
; /* host connection features */
157 u32 hardware_version
; /* of FCP channel */
158 u16 timer_ticks
; /* time int for a tick */
159 struct Scsi_Host
*scsi_host
; /* Pointer to mid-layer */
160 struct list_head port_list
; /* remote port list */
161 rwlock_t port_list_lock
; /* port list lock */
162 unsigned long req_no
; /* unique FSF req number */
163 struct zfcp_reqlist
*req_list
;
164 u32 fsf_req_seq_no
; /* FSF cmnd seq number */
165 rwlock_t abort_lock
; /* Protects against SCSI
168 atomic_t stat_miss
; /* # missing status reads*/
169 unsigned int stat_read_buf_num
;
170 struct work_struct stat_work
;
171 atomic_t status
; /* status of this adapter */
172 struct list_head erp_ready_head
; /* error recovery for this
174 wait_queue_head_t erp_ready_wq
;
175 struct list_head erp_running_head
;
177 wait_queue_head_t erp_done_wqh
;
178 struct zfcp_erp_action erp_action
; /* pending error recovery */
179 atomic_t erp_counter
;
180 u32 erp_total_count
; /* total nr of enqueued erp
182 u32 erp_low_mem_count
; /* nr of erp actions waiting
184 struct task_struct
*erp_thread
;
185 struct zfcp_fc_wka_ports
*gs
; /* generic services */
186 struct zfcp_dbf
*dbf
; /* debug traces */
187 struct zfcp_adapter_mempool pool
; /* Adapter memory pools */
188 struct fc_host_statistics
*fc_stats
;
189 struct fsf_qtcb_bottom_port
*stats_reset_data
;
190 unsigned long stats_reset
;
191 struct work_struct scan_work
;
192 struct work_struct ns_up_work
;
193 struct service_level service_level
;
194 struct workqueue_struct
*work_queue
;
195 struct device_dma_parameters dma_parms
;
196 struct zfcp_fc_events events
;
201 struct fc_rport
*rport
; /* rport of fc transport class */
202 struct list_head list
; /* list of remote ports */
203 struct zfcp_adapter
*adapter
; /* adapter used to access port */
204 struct list_head unit_list
; /* head of logical unit list */
205 rwlock_t unit_list_lock
; /* unit list lock */
206 atomic_t status
; /* status of this remote port */
207 u64 wwnn
; /* WWNN if known */
210 u32 handle
; /* handle assigned by FSF */
211 struct zfcp_erp_action erp_action
; /* pending error recovery */
212 atomic_t erp_counter
;
214 u32 supported_classes
;
215 struct work_struct gid_pn_work
;
216 struct work_struct test_link_work
;
217 struct work_struct rport_work
;
218 enum { RPORT_NONE
, RPORT_ADD
, RPORT_DEL
} rport_task
;
219 unsigned int starget_id
;
223 * struct zfcp_unit - LUN configured via zfcp sysfs
224 * @dev: struct device for sysfs representation and reference counting
225 * @list: entry in LUN/unit list per zfcp_port
226 * @port: reference to zfcp_port where this LUN is configured
227 * @fcp_lun: 64 bit LUN value
228 * @scsi_work: for running scsi_scan_target
230 * This is the representation of a LUN that has been configured for
231 * usage. The main data here is the 64 bit LUN value, data for
232 * running I/O and recovery is in struct zfcp_scsi_dev.
236 struct list_head list
;
237 struct zfcp_port
*port
;
239 struct work_struct scsi_work
;
243 * struct zfcp_scsi_dev - zfcp data per SCSI device
244 * @status: zfcp internal status flags
245 * @lun_handle: handle from "open lun" for issuing FSF requests
246 * @erp_action: zfcp erp data for opening and recovering this LUN
247 * @erp_counter: zfcp erp counter for this LUN
248 * @latencies: FSF channel and fabric latencies
249 * @port: zfcp_port where this LUN belongs to
251 struct zfcp_scsi_dev
{
254 struct zfcp_erp_action erp_action
;
255 atomic_t erp_counter
;
256 struct zfcp_latencies latencies
;
257 struct zfcp_port
*port
;
261 * sdev_to_zfcp - Access zfcp LUN data for SCSI device
262 * @sdev: scsi_device where to get the zfcp_scsi_dev pointer
264 static inline struct zfcp_scsi_dev
*sdev_to_zfcp(struct scsi_device
*sdev
)
266 return scsi_transport_device_data(sdev
);
270 * zfcp_scsi_dev_lun - Return SCSI device LUN as 64 bit FCP LUN
271 * @sdev: SCSI device where to get the LUN from
273 static inline u64
zfcp_scsi_dev_lun(struct scsi_device
*sdev
)
277 int_to_scsilun(sdev
->lun
, (struct scsi_lun
*)&fcp_lun
);
282 * struct zfcp_fsf_req - basic FSF request structure
283 * @list: list of FSF requests
284 * @req_id: unique request ID
285 * @adapter: adapter this request belongs to
286 * @qdio_req: qdio queue related values
287 * @completion: used to signal the completion of the request
288 * @status: status of the request
289 * @fsf_command: FSF command issued
290 * @qtcb: associated QTCB
291 * @seq_no: sequence number of this request
292 * @data: private data
293 * @timer: timer data of this request
294 * @erp_action: reference to erp action if request issued on behalf of ERP
295 * @pool: reference to memory pool if used for this request
296 * @issued: time when request was send (STCK)
297 * @handler: handler which should be called to process response
299 struct zfcp_fsf_req
{
300 struct list_head list
;
301 unsigned long req_id
;
302 struct zfcp_adapter
*adapter
;
303 struct zfcp_qdio_req qdio_req
;
304 struct completion completion
;
307 struct fsf_qtcb
*qtcb
;
310 struct timer_list timer
;
311 struct zfcp_erp_action
*erp_action
;
313 unsigned long long issued
;
314 void (*handler
)(struct zfcp_fsf_req
*);
317 #endif /* ZFCP_DEF_H */