Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* $Id$ |
| 2 | * 1993/03/31 |
| 3 | * linux/kernel/aha1740.c |
| 4 | * |
| 5 | * Based loosely on aha1542.c which is |
| 6 | * Copyright (C) 1992 Tommy Thorn and |
| 7 | * Modified by Eric Youngdale |
| 8 | * |
| 9 | * This file is aha1740.c, written and |
| 10 | * Copyright (C) 1992,1993 Brad McLean |
| 11 | * brad@saturn.gaylord.com or brad@bradpc.gaylord.com. |
| 12 | * |
| 13 | * Modifications to makecode and queuecommand |
| 14 | * for proper handling of multiple devices courteously |
| 15 | * provided by Michael Weller, March, 1993 |
| 16 | * |
| 17 | * Multiple adapter support, extended translation detection, |
| 18 | * update to current scsi subsystem changes, proc fs support, |
| 19 | * working (!) module support based on patches from Andreas Arens, |
| 20 | * by Andreas Degert <ad@papyrus.hamburg.com>, 2/1997 |
| 21 | * |
| 22 | * aha1740_makecode may still need even more work |
| 23 | * if it doesn't work for your devices, take a look. |
| 24 | * |
Alan Cox | fa195af | 2008-10-27 15:16:36 +0000 | [diff] [blame] | 25 | * Reworked for new_eh and new locking by Alan Cox <alan@lxorguk.ukuu.org.uk> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | * |
| 27 | * Converted to EISA and generic DMA APIs by Marc Zyngier |
| 28 | * <maz@wild-wind.fr.eu.org>, 4/2003. |
| 29 | * |
| 30 | * Shared interrupt support added by Rask Ingemann Lambertsen |
| 31 | * <rask@sygehus.dk>, 10/2003 |
| 32 | * |
| 33 | * For the avoidance of doubt the "preferred form" of this code is one which |
| 34 | * is in an open non patent encumbered format. Where cryptographic key signing |
| 35 | * forms part of the process of creating an executable the information |
| 36 | * including keys needed to generate an equivalently functional executable |
| 37 | * are deemed to be part of the source code. |
| 38 | */ |
| 39 | |
| 40 | #include <linux/blkdev.h> |
| 41 | #include <linux/interrupt.h> |
| 42 | #include <linux/module.h> |
| 43 | #include <linux/kernel.h> |
| 44 | #include <linux/types.h> |
| 45 | #include <linux/string.h> |
| 46 | #include <linux/ioport.h> |
| 47 | #include <linux/proc_fs.h> |
| 48 | #include <linux/stat.h> |
| 49 | #include <linux/init.h> |
| 50 | #include <linux/device.h> |
| 51 | #include <linux/eisa.h> |
| 52 | #include <linux/dma-mapping.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 53 | #include <linux/gfp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | |
| 55 | #include <asm/dma.h> |
| 56 | #include <asm/system.h> |
| 57 | #include <asm/io.h> |
| 58 | |
| 59 | #include "scsi.h" |
| 60 | #include <scsi/scsi_host.h> |
| 61 | #include "aha1740.h" |
| 62 | |
| 63 | /* IF YOU ARE HAVING PROBLEMS WITH THIS DRIVER, AND WANT TO WATCH |
| 64 | IT WORK, THEN: |
| 65 | #define DEBUG |
| 66 | */ |
| 67 | #ifdef DEBUG |
| 68 | #define DEB(x) x |
| 69 | #else |
| 70 | #define DEB(x) |
| 71 | #endif |
| 72 | |
| 73 | struct aha1740_hostdata { |
| 74 | struct eisa_device *edev; |
| 75 | unsigned int translation; |
| 76 | unsigned int last_ecb_used; |
| 77 | dma_addr_t ecb_dma_addr; |
| 78 | struct ecb ecb[AHA1740_ECBS]; |
| 79 | }; |
| 80 | |
| 81 | struct aha1740_sg { |
| 82 | struct aha1740_chain sg_chain[AHA1740_SCATTER]; |
| 83 | dma_addr_t sg_dma_addr; |
| 84 | dma_addr_t buf_dma_addr; |
| 85 | }; |
| 86 | |
| 87 | #define HOSTDATA(host) ((struct aha1740_hostdata *) &host->hostdata) |
| 88 | |
| 89 | static inline struct ecb *ecb_dma_to_cpu (struct Scsi_Host *host, |
| 90 | dma_addr_t dma) |
| 91 | { |
| 92 | struct aha1740_hostdata *hdata = HOSTDATA (host); |
| 93 | dma_addr_t offset; |
| 94 | |
| 95 | offset = dma - hdata->ecb_dma_addr; |
| 96 | |
| 97 | return (struct ecb *)(((char *) hdata->ecb) + (unsigned int) offset); |
| 98 | } |
| 99 | |
| 100 | static inline dma_addr_t ecb_cpu_to_dma (struct Scsi_Host *host, void *cpu) |
| 101 | { |
| 102 | struct aha1740_hostdata *hdata = HOSTDATA (host); |
| 103 | dma_addr_t offset; |
| 104 | |
| 105 | offset = (char *) cpu - (char *) hdata->ecb; |
| 106 | |
| 107 | return hdata->ecb_dma_addr + offset; |
| 108 | } |
| 109 | |
| 110 | static int aha1740_proc_info(struct Scsi_Host *shpnt, char *buffer, |
| 111 | char **start, off_t offset, |
| 112 | int length, int inout) |
| 113 | { |
| 114 | int len; |
| 115 | struct aha1740_hostdata *host; |
| 116 | |
| 117 | if (inout) |
| 118 | return-ENOSYS; |
| 119 | |
| 120 | host = HOSTDATA(shpnt); |
| 121 | |
| 122 | len = sprintf(buffer, "aha174x at IO:%lx, IRQ %d, SLOT %d.\n" |
| 123 | "Extended translation %sabled.\n", |
| 124 | shpnt->io_port, shpnt->irq, host->edev->slot, |
| 125 | host->translation ? "en" : "dis"); |
| 126 | |
| 127 | if (offset > len) { |
| 128 | *start = buffer; |
| 129 | return 0; |
| 130 | } |
| 131 | |
| 132 | *start = buffer + offset; |
| 133 | len -= offset; |
| 134 | if (len > length) |
| 135 | len = length; |
| 136 | return len; |
| 137 | } |
| 138 | |
| 139 | static int aha1740_makecode(unchar *sense, unchar *status) |
| 140 | { |
| 141 | struct statusword |
| 142 | { |
| 143 | ushort don:1, /* Command Done - No Error */ |
| 144 | du:1, /* Data underrun */ |
| 145 | :1, qf:1, /* Queue full */ |
| 146 | sc:1, /* Specification Check */ |
| 147 | dor:1, /* Data overrun */ |
| 148 | ch:1, /* Chaining Halted */ |
| 149 | intr:1, /* Interrupt issued */ |
| 150 | asa:1, /* Additional Status Available */ |
| 151 | sns:1, /* Sense information Stored */ |
| 152 | :1, ini:1, /* Initialization Required */ |
| 153 | me:1, /* Major error or exception */ |
| 154 | :1, eca:1, /* Extended Contingent alliance */ |
| 155 | :1; |
| 156 | } status_word; |
| 157 | int retval = DID_OK; |
| 158 | |
| 159 | status_word = * (struct statusword *) status; |
| 160 | #ifdef DEBUG |
| 161 | printk("makecode from %x,%x,%x,%x %x,%x,%x,%x", |
| 162 | status[0], status[1], status[2], status[3], |
| 163 | sense[0], sense[1], sense[2], sense[3]); |
| 164 | #endif |
| 165 | if (!status_word.don) { /* Anything abnormal was detected */ |
| 166 | if ( (status[1]&0x18) || status_word.sc ) { |
| 167 | /*Additional info available*/ |
| 168 | /* Use the supplied info for further diagnostics */ |
| 169 | switch ( status[2] ) { |
| 170 | case 0x12: |
| 171 | if ( status_word.dor ) |
| 172 | retval=DID_ERROR; /* It's an Overrun */ |
| 173 | /* If not overrun, assume underrun and |
| 174 | * ignore it! */ |
| 175 | case 0x00: /* No info, assume no error, should |
| 176 | * not occur */ |
| 177 | break; |
| 178 | case 0x11: |
| 179 | case 0x21: |
| 180 | retval=DID_TIME_OUT; |
| 181 | break; |
| 182 | case 0x0a: |
| 183 | retval=DID_BAD_TARGET; |
| 184 | break; |
| 185 | case 0x04: |
| 186 | case 0x05: |
| 187 | retval=DID_ABORT; |
| 188 | /* Either by this driver or the |
| 189 | * AHA1740 itself */ |
| 190 | break; |
| 191 | default: |
| 192 | retval=DID_ERROR; /* No further |
| 193 | * diagnostics |
| 194 | * possible */ |
| 195 | } |
| 196 | } else { |
| 197 | /* Michael suggests, and Brad concurs: */ |
| 198 | if ( status_word.qf ) { |
| 199 | retval = DID_TIME_OUT; /* forces a redo */ |
| 200 | /* I think this specific one should |
| 201 | * not happen -Brad */ |
| 202 | printk("aha1740.c: WARNING: AHA1740 queue overflow!\n"); |
| 203 | } else |
| 204 | if ( status[0]&0x60 ) { |
| 205 | /* Didn't find a better error */ |
| 206 | retval = DID_ERROR; |
| 207 | } |
| 208 | /* In any other case return DID_OK so for example |
| 209 | CONDITION_CHECKS make it through to the appropriate |
| 210 | device driver */ |
| 211 | } |
| 212 | } |
| 213 | /* Under all circumstances supply the target status -Michael */ |
| 214 | return status[3] | retval << 16; |
| 215 | } |
| 216 | |
| 217 | static int aha1740_test_port(unsigned int base) |
| 218 | { |
| 219 | if ( inb(PORTADR(base)) & PORTADDR_ENH ) |
| 220 | return 1; /* Okay, we're all set */ |
| 221 | |
| 222 | printk("aha174x: Board detected, but not in enhanced mode, so disabled it.\n"); |
| 223 | return 0; |
| 224 | } |
| 225 | |
| 226 | /* A "high" level interrupt handler */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 227 | static irqreturn_t aha1740_intr_handle(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | { |
| 229 | struct Scsi_Host *host = (struct Scsi_Host *) dev_id; |
| 230 | void (*my_done)(Scsi_Cmnd *); |
| 231 | int errstatus, adapstat; |
| 232 | int number_serviced; |
| 233 | struct ecb *ecbptr; |
| 234 | Scsi_Cmnd *SCtmp; |
| 235 | unsigned int base; |
| 236 | unsigned long flags; |
| 237 | int handled = 0; |
| 238 | struct aha1740_sg *sgptr; |
| 239 | struct eisa_device *edev; |
| 240 | |
| 241 | if (!host) |
| 242 | panic("aha1740.c: Irq from unknown host!\n"); |
| 243 | spin_lock_irqsave(host->host_lock, flags); |
| 244 | base = host->io_port; |
| 245 | number_serviced = 0; |
| 246 | edev = HOSTDATA(host)->edev; |
| 247 | |
| 248 | while(inb(G2STAT(base)) & G2STAT_INTPEND) { |
| 249 | handled = 1; |
| 250 | DEB(printk("aha1740_intr top of loop.\n")); |
| 251 | adapstat = inb(G2INTST(base)); |
| 252 | ecbptr = ecb_dma_to_cpu (host, inl(MBOXIN0(base))); |
| 253 | outb(G2CNTRL_IRST,G2CNTRL(base)); /* interrupt reset */ |
| 254 | |
| 255 | switch ( adapstat & G2INTST_MASK ) { |
| 256 | case G2INTST_CCBRETRY: |
| 257 | case G2INTST_CCBERROR: |
| 258 | case G2INTST_CCBGOOD: |
| 259 | /* Host Ready -> Mailbox in complete */ |
| 260 | outb(G2CNTRL_HRDY,G2CNTRL(base)); |
| 261 | if (!ecbptr) { |
| 262 | printk("Aha1740 null ecbptr in interrupt (%x,%x,%x,%d)\n", |
| 263 | inb(G2STAT(base)),adapstat, |
| 264 | inb(G2INTST(base)), number_serviced++); |
| 265 | continue; |
| 266 | } |
| 267 | SCtmp = ecbptr->SCpnt; |
| 268 | if (!SCtmp) { |
| 269 | printk("Aha1740 null SCtmp in interrupt (%x,%x,%x,%d)\n", |
| 270 | inb(G2STAT(base)),adapstat, |
| 271 | inb(G2INTST(base)), number_serviced++); |
| 272 | continue; |
| 273 | } |
| 274 | sgptr = (struct aha1740_sg *) SCtmp->host_scribble; |
FUJITA Tomonori | c66cc13 | 2007-05-14 20:26:06 +0900 | [diff] [blame] | 275 | scsi_dma_unmap(SCtmp); |
| 276 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | /* Free the sg block */ |
| 278 | dma_free_coherent (&edev->dev, |
| 279 | sizeof (struct aha1740_sg), |
| 280 | SCtmp->host_scribble, |
| 281 | sgptr->sg_dma_addr); |
| 282 | |
| 283 | /* Fetch the sense data, and tuck it away, in |
| 284 | the required slot. The Adaptec |
| 285 | automatically fetches it, and there is no |
| 286 | guarantee that we will still have it in the |
| 287 | cdb when we come back */ |
| 288 | if ( (adapstat & G2INTST_MASK) == G2INTST_CCBERROR ) { |
| 289 | memcpy(SCtmp->sense_buffer, ecbptr->sense, |
FUJITA Tomonori | b80ca4f | 2008-01-13 15:46:13 +0900 | [diff] [blame] | 290 | SCSI_SENSE_BUFFERSIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | errstatus = aha1740_makecode(ecbptr->sense,ecbptr->status); |
| 292 | } else |
| 293 | errstatus = 0; |
| 294 | DEB(if (errstatus) |
| 295 | printk("aha1740_intr_handle: returning %6x\n", |
| 296 | errstatus)); |
| 297 | SCtmp->result = errstatus; |
| 298 | my_done = ecbptr->done; |
| 299 | memset(ecbptr,0,sizeof(struct ecb)); |
| 300 | if ( my_done ) |
| 301 | my_done(SCtmp); |
| 302 | break; |
| 303 | |
| 304 | case G2INTST_HARDFAIL: |
| 305 | printk(KERN_ALERT "aha1740 hardware failure!\n"); |
| 306 | panic("aha1740.c"); /* Goodbye */ |
| 307 | |
| 308 | case G2INTST_ASNEVENT: |
| 309 | printk("aha1740 asynchronous event: %02x %02x %02x %02x %02x\n", |
| 310 | adapstat, |
| 311 | inb(MBOXIN0(base)), |
| 312 | inb(MBOXIN1(base)), |
| 313 | inb(MBOXIN2(base)), |
| 314 | inb(MBOXIN3(base))); /* Say What? */ |
| 315 | /* Host Ready -> Mailbox in complete */ |
| 316 | outb(G2CNTRL_HRDY,G2CNTRL(base)); |
| 317 | break; |
| 318 | |
| 319 | case G2INTST_CMDGOOD: |
| 320 | /* set immediate command success flag here: */ |
| 321 | break; |
| 322 | |
| 323 | case G2INTST_CMDERROR: |
| 324 | /* Set immediate command failure flag here: */ |
| 325 | break; |
| 326 | } |
| 327 | number_serviced++; |
| 328 | } |
| 329 | |
| 330 | spin_unlock_irqrestore(host->host_lock, flags); |
| 331 | return IRQ_RETVAL(handled); |
| 332 | } |
| 333 | |
Jeff Garzik | f281233 | 2010-11-16 02:10:29 -0500 | [diff] [blame] | 334 | static int aha1740_queuecommand_lck(Scsi_Cmnd * SCpnt, void (*done)(Scsi_Cmnd *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | { |
| 336 | unchar direction; |
| 337 | unchar *cmd = (unchar *) SCpnt->cmnd; |
Jeff Garzik | 422c0d6 | 2005-10-24 18:05:09 -0400 | [diff] [blame] | 338 | unchar target = scmd_id(SCpnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | struct aha1740_hostdata *host = HOSTDATA(SCpnt->device->host); |
| 340 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | dma_addr_t sg_dma; |
| 342 | struct aha1740_sg *sgptr; |
FUJITA Tomonori | c66cc13 | 2007-05-14 20:26:06 +0900 | [diff] [blame] | 343 | int ecbno, nseg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | DEB(int i); |
| 345 | |
| 346 | if(*cmd == REQUEST_SENSE) { |
| 347 | SCpnt->result = 0; |
| 348 | done(SCpnt); |
| 349 | return 0; |
| 350 | } |
| 351 | |
| 352 | #ifdef DEBUG |
| 353 | if (*cmd == READ_10 || *cmd == WRITE_10) |
| 354 | i = xscsi2int(cmd+2); |
| 355 | else if (*cmd == READ_6 || *cmd == WRITE_6) |
| 356 | i = scsi2int(cmd+2); |
| 357 | else |
| 358 | i = -1; |
| 359 | printk("aha1740_queuecommand: dev %d cmd %02x pos %d len %d ", |
| 360 | target, *cmd, i, bufflen); |
| 361 | printk("scsi cmd:"); |
| 362 | for (i = 0; i < SCpnt->cmd_len; i++) printk("%02x ", cmd[i]); |
| 363 | printk("\n"); |
| 364 | #endif |
| 365 | |
| 366 | /* locate an available ecb */ |
| 367 | spin_lock_irqsave(SCpnt->device->host->host_lock, flags); |
| 368 | ecbno = host->last_ecb_used + 1; /* An optimization */ |
| 369 | if (ecbno >= AHA1740_ECBS) |
| 370 | ecbno = 0; |
| 371 | do { |
| 372 | if (!host->ecb[ecbno].cmdw) |
| 373 | break; |
| 374 | ecbno++; |
| 375 | if (ecbno >= AHA1740_ECBS) |
| 376 | ecbno = 0; |
| 377 | } while (ecbno != host->last_ecb_used); |
| 378 | |
| 379 | if (host->ecb[ecbno].cmdw) |
| 380 | panic("Unable to find empty ecb for aha1740.\n"); |
| 381 | |
| 382 | host->ecb[ecbno].cmdw = AHA1740CMD_INIT; /* SCSI Initiator Command |
| 383 | doubles as reserved flag */ |
| 384 | |
| 385 | host->last_ecb_used = ecbno; |
| 386 | spin_unlock_irqrestore(SCpnt->device->host->host_lock, flags); |
| 387 | |
| 388 | #ifdef DEBUG |
| 389 | printk("Sending command (%d %x)...", ecbno, done); |
| 390 | #endif |
| 391 | |
| 392 | host->ecb[ecbno].cdblen = SCpnt->cmd_len; /* SCSI Command |
| 393 | * Descriptor Block |
| 394 | * Length */ |
| 395 | |
| 396 | direction = 0; |
| 397 | if (*cmd == READ_10 || *cmd == READ_6) |
| 398 | direction = 1; |
| 399 | else if (*cmd == WRITE_10 || *cmd == WRITE_6) |
| 400 | direction = 0; |
| 401 | |
| 402 | memcpy(host->ecb[ecbno].cdb, cmd, SCpnt->cmd_len); |
| 403 | |
| 404 | SCpnt->host_scribble = dma_alloc_coherent (&host->edev->dev, |
| 405 | sizeof (struct aha1740_sg), |
| 406 | &sg_dma, GFP_ATOMIC); |
| 407 | if(SCpnt->host_scribble == NULL) { |
| 408 | printk(KERN_WARNING "aha1740: out of memory in queuecommand!\n"); |
| 409 | return 1; |
| 410 | } |
| 411 | sgptr = (struct aha1740_sg *) SCpnt->host_scribble; |
| 412 | sgptr->sg_dma_addr = sg_dma; |
FUJITA Tomonori | c66cc13 | 2007-05-14 20:26:06 +0900 | [diff] [blame] | 413 | |
| 414 | nseg = scsi_dma_map(SCpnt); |
| 415 | BUG_ON(nseg < 0); |
| 416 | if (nseg) { |
| 417 | struct scatterlist *sg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | struct aha1740_chain * cptr; |
FUJITA Tomonori | c66cc13 | 2007-05-14 20:26:06 +0900 | [diff] [blame] | 419 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | DEB(unsigned char * ptr); |
| 421 | |
| 422 | host->ecb[ecbno].sg = 1; /* SCSI Initiator Command |
| 423 | * w/scatter-gather*/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | cptr = sgptr->sg_chain; |
FUJITA Tomonori | c66cc13 | 2007-05-14 20:26:06 +0900 | [diff] [blame] | 425 | scsi_for_each_sg(SCpnt, sg, nseg, i) { |
| 426 | cptr[i].datalen = sg_dma_len (sg); |
| 427 | cptr[i].dataptr = sg_dma_address (sg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | } |
FUJITA Tomonori | c66cc13 | 2007-05-14 20:26:06 +0900 | [diff] [blame] | 429 | host->ecb[ecbno].datalen = nseg * sizeof(struct aha1740_chain); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | host->ecb[ecbno].dataptr = sg_dma; |
| 431 | #ifdef DEBUG |
| 432 | printk("cptr %x: ",cptr); |
| 433 | ptr = (unsigned char *) cptr; |
| 434 | for(i=0;i<24;i++) printk("%02x ", ptr[i]); |
| 435 | #endif |
| 436 | } else { |
FUJITA Tomonori | c66cc13 | 2007-05-14 20:26:06 +0900 | [diff] [blame] | 437 | host->ecb[ecbno].datalen = 0; |
| 438 | host->ecb[ecbno].dataptr = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | } |
| 440 | host->ecb[ecbno].lun = SCpnt->device->lun; |
| 441 | host->ecb[ecbno].ses = 1; /* Suppress underrun errors */ |
| 442 | host->ecb[ecbno].dir = direction; |
| 443 | host->ecb[ecbno].ars = 1; /* Yes, get the sense on an error */ |
| 444 | host->ecb[ecbno].senselen = 12; |
| 445 | host->ecb[ecbno].senseptr = ecb_cpu_to_dma (SCpnt->device->host, |
| 446 | host->ecb[ecbno].sense); |
| 447 | host->ecb[ecbno].statusptr = ecb_cpu_to_dma (SCpnt->device->host, |
| 448 | host->ecb[ecbno].status); |
| 449 | host->ecb[ecbno].done = done; |
| 450 | host->ecb[ecbno].SCpnt = SCpnt; |
| 451 | #ifdef DEBUG |
| 452 | { |
| 453 | int i; |
| 454 | printk("aha1740_command: sending.. "); |
| 455 | for (i = 0; i < sizeof(host->ecb[ecbno]) - 10; i++) |
| 456 | printk("%02x ", ((unchar *)&host->ecb[ecbno])[i]); |
| 457 | } |
| 458 | printk("\n"); |
| 459 | #endif |
| 460 | if (done) { |
| 461 | /* The Adaptec Spec says the card is so fast that the loops |
| 462 | will only be executed once in the code below. Even if this |
| 463 | was true with the fastest processors when the spec was |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 464 | written, it doesn't seem to be true with today's fast |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | processors. We print a warning if the code is executed more |
| 466 | often than LOOPCNT_WARN. If this happens, it should be |
| 467 | investigated. If the count reaches LOOPCNT_MAX, we assume |
| 468 | something is broken; since there is no way to return an |
| 469 | error (the return value is ignored by the mid-level scsi |
| 470 | layer) we have to panic (and maybe that's the best thing we |
| 471 | can do then anyhow). */ |
| 472 | |
| 473 | #define LOOPCNT_WARN 10 /* excessive mbxout wait -> syslog-msg */ |
| 474 | #define LOOPCNT_MAX 1000000 /* mbxout deadlock -> panic() after ~ 2 sec. */ |
| 475 | int loopcnt; |
| 476 | unsigned int base = SCpnt->device->host->io_port; |
| 477 | DEB(printk("aha1740[%d] critical section\n",ecbno)); |
| 478 | |
| 479 | spin_lock_irqsave(SCpnt->device->host->host_lock, flags); |
| 480 | for (loopcnt = 0; ; loopcnt++) { |
| 481 | if (inb(G2STAT(base)) & G2STAT_MBXOUT) break; |
| 482 | if (loopcnt == LOOPCNT_WARN) { |
| 483 | printk("aha1740[%d]_mbxout wait!\n",ecbno); |
| 484 | } |
| 485 | if (loopcnt == LOOPCNT_MAX) |
| 486 | panic("aha1740.c: mbxout busy!\n"); |
| 487 | } |
| 488 | outl (ecb_cpu_to_dma (SCpnt->device->host, host->ecb + ecbno), |
| 489 | MBOXOUT0(base)); |
| 490 | for (loopcnt = 0; ; loopcnt++) { |
| 491 | if (! (inb(G2STAT(base)) & G2STAT_BUSY)) break; |
| 492 | if (loopcnt == LOOPCNT_WARN) { |
| 493 | printk("aha1740[%d]_attn wait!\n",ecbno); |
| 494 | } |
| 495 | if (loopcnt == LOOPCNT_MAX) |
| 496 | panic("aha1740.c: attn wait failed!\n"); |
| 497 | } |
| 498 | outb(ATTN_START | (target & 7), ATTN(base)); /* Start it up */ |
| 499 | spin_unlock_irqrestore(SCpnt->device->host->host_lock, flags); |
| 500 | DEB(printk("aha1740[%d] request queued.\n",ecbno)); |
| 501 | } else |
| 502 | printk(KERN_ALERT "aha1740_queuecommand: done can't be NULL\n"); |
| 503 | return 0; |
| 504 | } |
| 505 | |
Jeff Garzik | f281233 | 2010-11-16 02:10:29 -0500 | [diff] [blame] | 506 | static DEF_SCSI_QCMD(aha1740_queuecommand) |
| 507 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | /* Query the board for its irq_level and irq_type. Nothing else matters |
| 509 | in enhanced mode on an EISA bus. */ |
| 510 | |
| 511 | static void aha1740_getconfig(unsigned int base, unsigned int *irq_level, |
| 512 | unsigned int *irq_type, |
| 513 | unsigned int *translation) |
| 514 | { |
| 515 | static int intab[] = { 9, 10, 11, 12, 0, 14, 15, 0 }; |
| 516 | |
| 517 | *irq_level = intab[inb(INTDEF(base)) & 0x7]; |
| 518 | *irq_type = (inb(INTDEF(base)) & 0x8) >> 3; |
| 519 | *translation = inb(RESV1(base)) & 0x1; |
| 520 | outb(inb(INTDEF(base)) | 0x10, INTDEF(base)); |
| 521 | } |
| 522 | |
| 523 | static int aha1740_biosparam(struct scsi_device *sdev, |
| 524 | struct block_device *dev, |
| 525 | sector_t capacity, int* ip) |
| 526 | { |
| 527 | int size = capacity; |
| 528 | int extended = HOSTDATA(sdev->host)->translation; |
| 529 | |
| 530 | DEB(printk("aha1740_biosparam\n")); |
| 531 | if (extended && (ip[2] > 1024)) { |
| 532 | ip[0] = 255; |
| 533 | ip[1] = 63; |
| 534 | ip[2] = size / (255 * 63); |
| 535 | } else { |
| 536 | ip[0] = 64; |
| 537 | ip[1] = 32; |
| 538 | ip[2] = size >> 11; |
| 539 | } |
| 540 | return 0; |
| 541 | } |
| 542 | |
| 543 | static int aha1740_eh_abort_handler (Scsi_Cmnd *dummy) |
| 544 | { |
| 545 | /* |
| 546 | * From Alan Cox : |
| 547 | * The AHA1740 has firmware handled abort/reset handling. The "head in |
| 548 | * sand" kernel code is correct for once 8) |
| 549 | * |
| 550 | * So we define a dummy handler just to keep the kernel SCSI code as |
| 551 | * quiet as possible... |
| 552 | */ |
| 553 | |
| 554 | return 0; |
| 555 | } |
| 556 | |
Christoph Hellwig | d0be4a7d | 2005-10-31 18:31:40 +0100 | [diff] [blame] | 557 | static struct scsi_host_template aha1740_template = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | .module = THIS_MODULE, |
| 559 | .proc_name = "aha1740", |
| 560 | .proc_info = aha1740_proc_info, |
| 561 | .name = "Adaptec 174x (EISA)", |
| 562 | .queuecommand = aha1740_queuecommand, |
| 563 | .bios_param = aha1740_biosparam, |
| 564 | .can_queue = AHA1740_ECBS, |
| 565 | .this_id = 7, |
| 566 | .sg_tablesize = AHA1740_SCATTER, |
| 567 | .cmd_per_lun = AHA1740_CMDLUN, |
| 568 | .use_clustering = ENABLE_CLUSTERING, |
| 569 | .eh_abort_handler = aha1740_eh_abort_handler, |
| 570 | }; |
| 571 | |
| 572 | static int aha1740_probe (struct device *dev) |
| 573 | { |
Jeff Garzik | 08157cd | 2006-11-08 19:56:19 -0800 | [diff] [blame] | 574 | int slotbase, rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | unsigned int irq_level, irq_type, translation; |
| 576 | struct Scsi_Host *shpnt; |
| 577 | struct aha1740_hostdata *host; |
| 578 | struct eisa_device *edev = to_eisa_device (dev); |
| 579 | |
| 580 | DEB(printk("aha1740_probe: \n")); |
| 581 | |
| 582 | slotbase = edev->base_addr + EISA_VENDOR_ID_OFFSET; |
| 583 | if (!request_region(slotbase, SLOTSIZE, "aha1740")) /* See if in use */ |
| 584 | return -EBUSY; |
| 585 | if (!aha1740_test_port(slotbase)) |
| 586 | goto err_release_region; |
| 587 | aha1740_getconfig(slotbase,&irq_level,&irq_type,&translation); |
| 588 | if ((inb(G2STAT(slotbase)) & |
| 589 | (G2STAT_MBXOUT|G2STAT_BUSY)) != G2STAT_MBXOUT) { |
| 590 | /* If the card isn't ready, hard reset it */ |
| 591 | outb(G2CNTRL_HRST, G2CNTRL(slotbase)); |
| 592 | outb(0, G2CNTRL(slotbase)); |
| 593 | } |
| 594 | printk(KERN_INFO "Configuring slot %d at IO:%x, IRQ %u (%s)\n", |
| 595 | edev->slot, slotbase, irq_level, irq_type ? "edge" : "level"); |
| 596 | printk(KERN_INFO "aha174x: Extended translation %sabled.\n", |
| 597 | translation ? "en" : "dis"); |
| 598 | shpnt = scsi_host_alloc(&aha1740_template, |
| 599 | sizeof(struct aha1740_hostdata)); |
| 600 | if(shpnt == NULL) |
| 601 | goto err_release_region; |
| 602 | |
| 603 | shpnt->base = 0; |
| 604 | shpnt->io_port = slotbase; |
| 605 | shpnt->n_io_port = SLOTSIZE; |
| 606 | shpnt->irq = irq_level; |
| 607 | shpnt->dma_channel = 0xff; |
| 608 | host = HOSTDATA(shpnt); |
| 609 | host->edev = edev; |
| 610 | host->translation = translation; |
| 611 | host->ecb_dma_addr = dma_map_single (&edev->dev, host->ecb, |
| 612 | sizeof (host->ecb), |
| 613 | DMA_BIDIRECTIONAL); |
| 614 | if (!host->ecb_dma_addr) { |
| 615 | printk (KERN_ERR "aha1740_probe: Couldn't map ECB, giving up\n"); |
| 616 | scsi_unregister (shpnt); |
| 617 | goto err_host_put; |
| 618 | } |
| 619 | |
| 620 | DEB(printk("aha1740_probe: enable interrupt channel %d\n",irq_level)); |
Thomas Gleixner | 1d6f359 | 2006-07-01 19:29:42 -0700 | [diff] [blame] | 621 | if (request_irq(irq_level,aha1740_intr_handle,irq_type ? 0 : IRQF_SHARED, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | "aha1740",shpnt)) { |
| 623 | printk(KERN_ERR "aha1740_probe: Unable to allocate IRQ %d.\n", |
| 624 | irq_level); |
| 625 | goto err_unmap; |
| 626 | } |
| 627 | |
| 628 | eisa_set_drvdata (edev, shpnt); |
Jeff Garzik | 08157cd | 2006-11-08 19:56:19 -0800 | [diff] [blame] | 629 | |
| 630 | rc = scsi_add_host (shpnt, dev); |
| 631 | if (rc) |
| 632 | goto err_irq; |
| 633 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | scsi_scan_host (shpnt); |
| 635 | return 0; |
| 636 | |
Jeff Garzik | 08157cd | 2006-11-08 19:56:19 -0800 | [diff] [blame] | 637 | err_irq: |
| 638 | free_irq(irq_level, shpnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | err_unmap: |
| 640 | dma_unmap_single (&edev->dev, host->ecb_dma_addr, |
| 641 | sizeof (host->ecb), DMA_BIDIRECTIONAL); |
| 642 | err_host_put: |
| 643 | scsi_host_put (shpnt); |
| 644 | err_release_region: |
| 645 | release_region(slotbase, SLOTSIZE); |
| 646 | |
| 647 | return -ENODEV; |
| 648 | } |
| 649 | |
| 650 | static __devexit int aha1740_remove (struct device *dev) |
| 651 | { |
Greg Kroah-Hartman | 78c55d7 | 2009-04-30 14:43:31 -0700 | [diff] [blame] | 652 | struct Scsi_Host *shpnt = dev_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | struct aha1740_hostdata *host = HOSTDATA (shpnt); |
| 654 | |
| 655 | scsi_remove_host(shpnt); |
| 656 | |
| 657 | free_irq (shpnt->irq, shpnt); |
| 658 | dma_unmap_single (dev, host->ecb_dma_addr, |
| 659 | sizeof (host->ecb), DMA_BIDIRECTIONAL); |
| 660 | release_region (shpnt->io_port, SLOTSIZE); |
| 661 | |
| 662 | scsi_host_put (shpnt); |
| 663 | |
| 664 | return 0; |
| 665 | } |
| 666 | |
| 667 | static struct eisa_device_id aha1740_ids[] = { |
| 668 | { "ADP0000" }, /* 1740 */ |
| 669 | { "ADP0001" }, /* 1740A */ |
| 670 | { "ADP0002" }, /* 1742A */ |
| 671 | { "ADP0400" }, /* 1744 */ |
| 672 | { "" } |
| 673 | }; |
Michael Tokarev | 07563c7 | 2006-09-27 01:50:56 -0700 | [diff] [blame] | 674 | MODULE_DEVICE_TABLE(eisa, aha1740_ids); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | |
| 676 | static struct eisa_driver aha1740_driver = { |
| 677 | .id_table = aha1740_ids, |
| 678 | .driver = { |
| 679 | .name = "aha1740", |
| 680 | .probe = aha1740_probe, |
| 681 | .remove = __devexit_p (aha1740_remove), |
| 682 | }, |
| 683 | }; |
| 684 | |
| 685 | static __init int aha1740_init (void) |
| 686 | { |
| 687 | return eisa_driver_register (&aha1740_driver); |
| 688 | } |
| 689 | |
| 690 | static __exit void aha1740_exit (void) |
| 691 | { |
| 692 | eisa_driver_unregister (&aha1740_driver); |
| 693 | } |
| 694 | |
| 695 | module_init (aha1740_init); |
| 696 | module_exit (aha1740_exit); |
| 697 | |
| 698 | MODULE_LICENSE("GPL"); |