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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 | /* SPDX-License-Identifier: GPL-2.0-only */ /* * linux/drivers/acorn/scsi/fas216.h * * Copyright (C) 1997-2000 Russell King * * FAS216 generic driver */ #ifndef FAS216_H #define FAS216_H #include <scsi/scsi_eh.h> #include "queue.h" #include "msgqueue.h" /* FAS register definitions */ /* transfer count low */ #define REG_CTCL (0) #define REG_STCL (0) /* transfer count medium */ #define REG_CTCM (1) #define REG_STCM (1) /* fifo data */ #define REG_FF (2) /* command */ #define REG_CMD (3) #define CMD_NOP 0x00 #define CMD_FLUSHFIFO 0x01 #define CMD_RESETCHIP 0x02 #define CMD_RESETSCSI 0x03 #define CMD_TRANSFERINFO 0x10 #define CMD_INITCMDCOMPLETE 0x11 #define CMD_MSGACCEPTED 0x12 #define CMD_PADBYTES 0x18 #define CMD_SETATN 0x1a #define CMD_RSETATN 0x1b #define CMD_SELECTWOATN 0x41 #define CMD_SELECTATN 0x42 #define CMD_SELECTATNSTOP 0x43 #define CMD_ENABLESEL 0x44 #define CMD_DISABLESEL 0x45 #define CMD_SELECTATN3 0x46 #define CMD_RESEL3 0x47 #define CMD_WITHDMA 0x80 /* status register (read) */ #define REG_STAT (4) #define STAT_IO (1 << 0) /* IO phase */ #define STAT_CD (1 << 1) /* CD phase */ #define STAT_MSG (1 << 2) /* MSG phase */ #define STAT_TRANSFERDONE (1 << 3) /* Transfer completed */ #define STAT_TRANSFERCNTZ (1 << 4) /* Transfer counter is zero */ #define STAT_PARITYERROR (1 << 5) /* Parity error */ #define STAT_REALBAD (1 << 6) /* Something bad */ #define STAT_INT (1 << 7) /* Interrupt */ #define STAT_BUSMASK (STAT_MSG|STAT_CD|STAT_IO) #define STAT_DATAOUT (0) /* Data out */ #define STAT_DATAIN (STAT_IO) /* Data in */ #define STAT_COMMAND (STAT_CD) /* Command out */ #define STAT_STATUS (STAT_CD|STAT_IO) /* Status In */ #define STAT_MESGOUT (STAT_MSG|STAT_CD) /* Message out */ #define STAT_MESGIN (STAT_MSG|STAT_CD|STAT_IO) /* Message In */ /* bus ID for select / reselect */ #define REG_SDID (4) #define BUSID(target) ((target) & 7) /* Interrupt status register (read) */ #define REG_INST (5) #define INST_SELWOATN (1 << 0) /* Select w/o ATN */ #define INST_SELATN (1 << 1) /* Select w/ATN */ #define INST_RESELECTED (1 << 2) /* Reselected */ #define INST_FUNCDONE (1 << 3) /* Function done */ #define INST_BUSSERVICE (1 << 4) /* Bus service */ #define INST_DISCONNECT (1 << 5) /* Disconnect */ #define INST_ILLEGALCMD (1 << 6) /* Illegal command */ #define INST_BUSRESET (1 << 7) /* SCSI Bus reset */ /* Timeout register (write) */ #define REG_STIM (5) /* Sequence step register (read) */ #define REG_IS (6) #define IS_BITS 0x07 #define IS_SELARB 0x00 /* Select & Arb ok */ #define IS_MSGBYTESENT 0x01 /* One byte message sent*/ #define IS_NOTCOMMAND 0x02 /* Not in command state */ #define IS_EARLYPHASE 0x03 /* Early phase change */ #define IS_COMPLETE 0x04 /* Command ok */ #define IS_SOF 0x08 /* Sync off flag */ /* Transfer period step (write) */ #define REG_STP (6) /* Synchronous Offset (write) */ #define REG_SOF (7) /* Fifo state register (read) */ #define REG_CFIS (7) #define CFIS_CF 0x1f /* Num bytes in FIFO */ #define CFIS_IS 0xe0 /* Step */ /* config register 1 */ #define REG_CNTL1 (8) #define CNTL1_CID (7 << 0) /* Chip ID */ #define CNTL1_STE (1 << 3) /* Self test enable */ #define CNTL1_PERE (1 << 4) /* Parity enable reporting en. */ #define CNTL1_PTE (1 << 5) /* Parity test enable */ #define CNTL1_DISR (1 << 6) /* Disable Irq on SCSI reset */ #define CNTL1_ETM (1 << 7) /* Extended Timing Mode */ /* Clock conversion factor (read) */ #define REG_CLKF (9) #define CLKF_F37MHZ 0x00 /* 35.01 - 40 MHz */ #define CLKF_F10MHZ 0x02 /* 10 MHz */ #define CLKF_F12MHZ 0x03 /* 10.01 - 15 MHz */ #define CLKF_F17MHZ 0x04 /* 15.01 - 20 MHz */ #define CLKF_F22MHZ 0x05 /* 20.01 - 25 MHz */ #define CLKF_F27MHZ 0x06 /* 25.01 - 30 MHz */ #define CLKF_F32MHZ 0x07 /* 30.01 - 35 MHz */ /* Chip test register (write) */ #define REG_FTM (10) #define TEST_FTM 0x01 /* Force target mode */ #define TEST_FIM 0x02 /* Force initiator mode */ #define TEST_FHI 0x04 /* Force high impedance mode */ /* Configuration register 2 (read/write) */ #define REG_CNTL2 (11) #define CNTL2_PGDP (1 << 0) /* Pass Th/Generate Data Parity */ #define CNTL2_PGRP (1 << 1) /* Pass Th/Generate Reg Parity */ #define CNTL2_ACDPE (1 << 2) /* Abort on Cmd/Data Parity Err */ #define CNTL2_S2FE (1 << 3) /* SCSI2 Features Enable */ #define CNTL2_TSDR (1 << 4) /* Tristate DREQ */ #define CNTL2_SBO (1 << 5) /* Select Byte Order */ #define CNTL2_ENF (1 << 6) /* Enable features */ #define CNTL2_DAE (1 << 7) /* Data Alignment Enable */ /* Configuration register 3 (read/write) */ #define REG_CNTL3 (12) #define CNTL3_BS8 (1 << 0) /* Burst size 8 */ #define CNTL3_MDM (1 << 1) /* Modify DMA mode */ #define CNTL3_LBTM (1 << 2) /* Last Byte Transfer mode */ #define CNTL3_FASTCLK (1 << 3) /* Fast SCSI clocking */ #define CNTL3_FASTSCSI (1 << 4) /* Fast SCSI */ #define CNTL3_G2CB (1 << 5) /* Group2 SCSI support */ #define CNTL3_QTAG (1 << 6) /* Enable 3 byte msgs */ #define CNTL3_ADIDCHK (1 << 7) /* Additional ID check */ /* High transfer count (read/write) */ #define REG_CTCH (14) #define REG_STCH (14) /* ID register (read only) */ #define REG_ID (14) /* Data alignment */ #define REG_DAL (15) typedef enum { PHASE_IDLE, /* we're not planning on doing anything */ PHASE_SELECTION, /* selecting a device */ PHASE_SELSTEPS, /* selection with command steps */ PHASE_COMMAND, /* command sent */ PHASE_MESSAGESENT, /* selected, and we're sending cmd */ PHASE_DATAOUT, /* data out to device */ PHASE_DATAIN, /* data in from device */ PHASE_MSGIN, /* message in from device */ PHASE_MSGIN_DISCONNECT, /* disconnecting from bus */ PHASE_MSGOUT, /* after message out phase */ PHASE_MSGOUT_EXPECT, /* expecting message out */ PHASE_STATUS, /* status from device */ PHASE_DONE /* Command complete */ } phase_t; typedef enum { DMA_OUT, /* DMA from memory to chip */ DMA_IN /* DMA from chip to memory */ } fasdmadir_t; typedef enum { fasdma_none, /* No dma */ fasdma_pio, /* PIO mode */ fasdma_pseudo, /* Pseudo DMA */ fasdma_real_block, /* Real DMA, on block by block basis */ fasdma_real_all /* Real DMA, on request by request */ } fasdmatype_t; typedef enum { neg_wait, /* Negotiate with device */ neg_inprogress, /* Negotiation sent */ neg_complete, /* Negotiation complete */ neg_targcomplete, /* Target completed negotiation */ neg_invalid /* Negotiation not supported */ } neg_t; #define MAGIC 0x441296bdUL #define NR_MSGS 8 #define FASCAP_DMA (1 << 0) #define FASCAP_PSEUDODMA (1 << 1) typedef struct { unsigned long magic_start; spinlock_t host_lock; struct Scsi_Host *host; /* host */ struct scsi_cmnd *SCpnt; /* currently processing command */ struct scsi_cmnd *origSCpnt; /* original connecting command */ struct scsi_cmnd *reqSCpnt; /* request sense command */ struct scsi_cmnd *rstSCpnt; /* reset command */ struct scsi_cmnd *pending_SCpnt[8]; /* per-device pending commands */ int next_pending; /* next pending device */ /* * Error recovery */ wait_queue_head_t eh_wait; struct timer_list eh_timer; unsigned int rst_dev_status; unsigned int rst_bus_status; /* driver information */ struct { phase_t phase; /* current phase */ void __iomem *io_base; /* iomem base of FAS216 */ unsigned int io_shift; /* shift to adjust reg offsets by */ unsigned char cfg[4]; /* configuration registers */ const char *type; /* chip type */ unsigned int irq; /* interrupt */ int dma; /* dma channel */ struct scsi_pointer SCp; /* current commands data pointer */ MsgQueue_t msgs; /* message queue for connected device */ unsigned int async_stp; /* Async transfer STP value */ unsigned char msgin_fifo; /* bytes in fifo at time of message in */ unsigned char message[256]; /* last message received from device */ unsigned char disconnectable:1; /* this command can be disconnected */ unsigned char aborting:1; /* aborting command */ } scsi; /* statistics information */ struct { unsigned int queues; unsigned int removes; unsigned int fins; unsigned int reads; unsigned int writes; unsigned int miscs; unsigned int disconnects; unsigned int aborts; unsigned int bus_resets; unsigned int host_resets; } stats; /* configuration information */ struct { unsigned char clockrate; /* clock rate of FAS device (MHz) */ unsigned char select_timeout; /* timeout (R5) */ unsigned char sync_max_depth; /* Synchronous xfer max fifo depth */ unsigned char wide_max_size; /* Maximum wide transfer size */ unsigned char cntl3; /* Control Reg 3 */ unsigned int asyncperiod; /* Async transfer period (ns) */ unsigned int capabilities; /* driver capabilities */ unsigned int disconnect_ok:1; /* Disconnects allowed? */ } ifcfg; /* queue handling */ struct { Queue_t issue; /* issue queue */ Queue_t disconnected; /* disconnected command queue */ } queues; /* per-device info */ struct fas216_device { unsigned char disconnect_ok:1; /* device can disconnect */ unsigned char parity_enabled:1; /* parity checking enabled */ unsigned char parity_check:1; /* need to check parity checking */ unsigned char period; /* sync xfer period in (*4ns) */ unsigned char stp; /* synchronous transfer period */ unsigned char sof; /* synchronous offset register */ unsigned char wide_xfer; /* currently negociated wide transfer */ neg_t sync_state; /* synchronous transfer mode */ neg_t wide_state; /* wide transfer mode */ } device[8]; unsigned long busyluns[64/sizeof(unsigned long)];/* array of bits indicating LUNs busy */ /* dma */ struct { fasdmatype_t transfer_type; /* current type of DMA transfer */ fasdmatype_t (*setup) (struct Scsi_Host *host, struct scsi_pointer *SCp, fasdmadir_t direction, fasdmatype_t min_dma); void (*pseudo)(struct Scsi_Host *host, struct scsi_pointer *SCp, fasdmadir_t direction, int transfer); void (*stop) (struct Scsi_Host *host, struct scsi_pointer *SCp); } dma; /* miscellaneous */ int internal_done; /* flag to indicate request done */ struct scsi_eh_save ses; /* holds request sense restore info */ unsigned long magic_end; } FAS216_Info; /* driver-private data per SCSI command. */ struct fas216_cmd_priv { /* * @scsi_pointer must be the first member. See also arm_scsi_pointer(). */ struct scsi_pointer scsi_pointer; void (*scsi_done)(struct scsi_cmnd *cmd); }; static inline struct fas216_cmd_priv *fas216_cmd_priv(struct scsi_cmnd *cmd) { return scsi_cmd_priv(cmd); } /* Function: int fas216_init (struct Scsi_Host *instance) * Purpose : initialise FAS/NCR/AMD SCSI structures. * Params : instance - a driver-specific filled-out structure * Returns : 0 on success */ extern int fas216_init (struct Scsi_Host *instance); /* Function: int fas216_add (struct Scsi_Host *instance, struct device *dev) * Purpose : initialise FAS/NCR/AMD SCSI ic. * Params : instance - a driver-specific filled-out structure * Returns : 0 on success */ extern int fas216_add (struct Scsi_Host *instance, struct device *dev); /* Function: int fas216_queue_command(struct Scsi_Host *h, struct scsi_cmnd *SCpnt) * Purpose : queue a command for adapter to process. * Params : h - host adapter * : SCpnt - Command to queue * Returns : 0 - success, else error */ extern int fas216_queue_command(struct Scsi_Host *h, struct scsi_cmnd *SCpnt); /* Function: int fas216_noqueue_command(struct Scsi_Host *h, struct scsi_cmnd *SCpnt) * Purpose : queue a command for adapter to process, and process it to completion. * Params : h - host adapter * : SCpnt - Command to queue * Returns : 0 - success, else error */ extern int fas216_noqueue_command(struct Scsi_Host *, struct scsi_cmnd *); /* Function: irqreturn_t fas216_intr (FAS216_Info *info) * Purpose : handle interrupts from the interface to progress a command * Params : info - interface to service */ extern irqreturn_t fas216_intr (FAS216_Info *info); extern void fas216_remove (struct Scsi_Host *instance); /* Function: void fas216_release (struct Scsi_Host *instance) * Purpose : release all resources and put everything to bed for FAS/NCR/AMD SCSI ic. * Params : instance - a driver-specific filled-out structure * Returns : 0 on success */ extern void fas216_release (struct Scsi_Host *instance); extern void fas216_print_host(FAS216_Info *info, struct seq_file *m); extern void fas216_print_stats(FAS216_Info *info, struct seq_file *m); extern void fas216_print_devices(FAS216_Info *info, struct seq_file *m); /* Function: int fas216_eh_abort(struct scsi_cmnd *SCpnt) * Purpose : abort this command * Params : SCpnt - command to abort * Returns : FAILED if unable to abort */ extern int fas216_eh_abort(struct scsi_cmnd *SCpnt); /* Function: int fas216_eh_device_reset(struct scsi_cmnd *SCpnt) * Purpose : Reset the device associated with this command * Params : SCpnt - command specifing device to reset * Returns : FAILED if unable to reset */ extern int fas216_eh_device_reset(struct scsi_cmnd *SCpnt); /* Function: int fas216_eh_bus_reset(struct scsi_cmnd *SCpnt) * Purpose : Reset the complete bus associated with this command * Params : SCpnt - command specifing bus to reset * Returns : FAILED if unable to reset */ extern int fas216_eh_bus_reset(struct scsi_cmnd *SCpnt); /* Function: int fas216_eh_host_reset(struct scsi_cmnd *SCpnt) * Purpose : Reset the host associated with this command * Params : SCpnt - command specifing host to reset * Returns : FAILED if unable to reset */ extern int fas216_eh_host_reset(struct scsi_cmnd *SCpnt); #endif /* FAS216_H */ |