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[mirror_ubuntu-artful-kernel.git] / drivers / scsi / eata.c
1 /*
2 * eata.c - Low-level driver for EATA/DMA SCSI host adapters.
3 *
4 * 03 Jun 2003 Rev. 8.10 for linux-2.5.70
5 * + Update for new IRQ API.
6 * + Use "goto" when appropriate.
7 * + Drop eata.h.
8 * + Update for new module_param API.
9 * + Module parameters can now be specified only in the
10 * same format as the kernel boot options.
11 *
12 * boot option old module param
13 * ----------- ------------------
14 * addr,... io_port=addr,...
15 * lc:[y|n] linked_comm=[1|0]
16 * mq:xx max_queue_depth=xx
17 * tm:[0|1|2] tag_mode=[0|1|2]
18 * et:[y|n] ext_tran=[1|0]
19 * rs:[y|n] rev_scan=[1|0]
20 * ip:[y|n] isa_probe=[1|0]
21 * ep:[y|n] eisa_probe=[1|0]
22 * pp:[y|n] pci_probe=[1|0]
23 *
24 * A valid example using the new parameter format is:
25 * modprobe eata "eata=0x7410,0x230,lc:y,tm:0,mq:4,ep:n"
26 *
27 * which is equivalent to the old format:
28 * modprobe eata io_port=0x7410,0x230 linked_comm=1 tag_mode=0 \
29 * max_queue_depth=4 eisa_probe=0
30 *
31 * 12 Feb 2003 Rev. 8.04 for linux 2.5.60
32 * + Release irq before calling scsi_register.
33 *
34 * 12 Nov 2002 Rev. 8.02 for linux 2.5.47
35 * + Release driver_lock before calling scsi_register.
36 *
37 * 11 Nov 2002 Rev. 8.01 for linux 2.5.47
38 * + Fixed bios_param and scsicam_bios_param calling parameters.
39 *
40 * 28 Oct 2002 Rev. 8.00 for linux 2.5.44-ac4
41 * + Use new tcq and adjust_queue_depth api.
42 * + New command line option (tm:[0-2]) to choose the type of tags:
43 * 0 -> disable tagging ; 1 -> simple tags ; 2 -> ordered tags.
44 * Default is tm:0 (tagged commands disabled).
45 * For compatibility the "tc:" option is an alias of the "tm:"
46 * option; tc:n is equivalent to tm:0 and tc:y is equivalent to
47 * tm:1.
48 * + The tagged_comm module parameter has been removed, use tag_mode
49 * instead, equivalent to the "tm:" boot option.
50 *
51 * 10 Oct 2002 Rev. 7.70 for linux 2.5.42
52 * + Foreport from revision 6.70.
53 *
54 * 25 Jun 2002 Rev. 6.70 for linux 2.4.19
55 * + This release is the first one tested on a Big Endian platform:
56 * fixed endian-ness problem due to bitfields;
57 * fixed endian-ness problem in read_pio.
58 * + Added new options for selectively probing ISA, EISA and PCI bus:
59 *
60 * Boot option Parameter name Default according to
61 *
62 * ip:[y|n] isa_probe=[1|0] CONFIG_ISA defined
63 * ep:[y|n] eisa_probe=[1|0] CONFIG_EISA defined
64 * pp:[y|n] pci_probe=[1|0] CONFIG_PCI defined
65 *
66 * The default action is to perform probing if the corrisponding
67 * bus is configured and to skip probing otherwise.
68 *
69 * + If pci_probe is in effect and a list of I/O ports is specified
70 * as parameter or boot option, pci_enable_device() is performed
71 * on all pci devices matching PCI_CLASS_STORAGE_SCSI.
72 *
73 * 21 Feb 2002 Rev. 6.52 for linux 2.4.18
74 * + Backport from rev. 7.22 (use io_request_lock).
75 *
76 * 20 Feb 2002 Rev. 7.22 for linux 2.5.5
77 * + Remove any reference to virt_to_bus().
78 * + Fix pio hang while detecting multiple HBAs.
79 * + Fixed a board detection bug: in a system with
80 * multiple ISA/EISA boards, all but the first one
81 * were erroneously detected as PCI.
82 *
83 * 01 Jan 2002 Rev. 7.20 for linux 2.5.1
84 * + Use the dynamic DMA mapping API.
85 *
86 * 19 Dec 2001 Rev. 7.02 for linux 2.5.1
87 * + Use SCpnt->sc_data_direction if set.
88 * + Use sglist.page instead of sglist.address.
89 *
90 * 11 Dec 2001 Rev. 7.00 for linux 2.5.1
91 * + Use host->host_lock instead of io_request_lock.
92 *
93 * 1 May 2001 Rev. 6.05 for linux 2.4.4
94 * + Clean up all pci related routines.
95 * + Fix data transfer direction for opcode SEND_CUE_SHEET (0x5d)
96 *
97 * 30 Jan 2001 Rev. 6.04 for linux 2.4.1
98 * + Call pci_resource_start after pci_enable_device.
99 *
100 * 25 Jan 2001 Rev. 6.03 for linux 2.4.0
101 * + "check_region" call replaced by "request_region".
102 *
103 * 22 Nov 2000 Rev. 6.02 for linux 2.4.0-test11
104 * + Return code checked when calling pci_enable_device.
105 * + Removed old scsi error handling support.
106 * + The obsolete boot option flag eh:n is silently ignored.
107 * + Removed error messages while a disk drive is powered up at
108 * boot time.
109 * + Improved boot messages: all tagged capable device are
110 * indicated as "tagged" or "soft-tagged" :
111 * - "soft-tagged" means that the driver is trying to do its
112 * own tagging (i.e. the tc:y option is in effect);
113 * - "tagged" means that the device supports tagged commands,
114 * but the driver lets the HBA be responsible for tagging
115 * support.
116 *
117 * 16 Sep 1999 Rev. 5.11 for linux 2.2.12 and 2.3.18
118 * + Updated to the new __setup interface for boot command line options.
119 * + When loaded as a module, accepts the new parameter boot_options
120 * which value is a string with the same format of the kernel boot
121 * command line options. A valid example is:
122 * modprobe eata 'boot_options="0x7410,0x230,lc:y,tc:n,mq:4"'
123 *
124 * 9 Sep 1999 Rev. 5.10 for linux 2.2.12 and 2.3.17
125 * + 64bit cleanup for Linux/Alpha platform support
126 * (contribution from H.J. Lu).
127 *
128 * 22 Jul 1999 Rev. 5.00 for linux 2.2.10 and 2.3.11
129 * + Removed pre-2.2 source code compatibility.
130 * + Added call to pci_set_master.
131 *
132 * 26 Jul 1998 Rev. 4.33 for linux 2.0.35 and 2.1.111
133 * + Added command line option (rs:[y|n]) to reverse the scan order
134 * of PCI boards. The default is rs:y, which reverses the BIOS order
135 * while registering PCI boards. The default value rs:y generates
136 * the same order of all previous revisions of this driver.
137 * Pls. note that "BIOS order" might have been reversed itself
138 * after the 2.1.9x PCI modifications in the linux kernel.
139 * The rs value is ignored when the explicit list of addresses
140 * is used by the "eata=port0,port1,..." command line option.
141 * + Added command line option (et:[y|n]) to force use of extended
142 * translation (255 heads, 63 sectors) as disk geometry.
143 * The default is et:n, which uses the disk geometry returned
144 * by scsicam_bios_param. The default value et:n is compatible with
145 * all previous revisions of this driver.
146 *
147 * 28 May 1998 Rev. 4.32 for linux 2.0.33 and 2.1.104
148 * Increased busy timeout from 10 msec. to 200 msec. while
149 * processing interrupts.
150 *
151 * 16 May 1998 Rev. 4.31 for linux 2.0.33 and 2.1.102
152 * Improved abort handling during the eh recovery process.
153 *
154 * 13 May 1998 Rev. 4.30 for linux 2.0.33 and 2.1.101
155 * The driver is now fully SMP safe, including the
156 * abort and reset routines.
157 * Added command line options (eh:[y|n]) to choose between
158 * new_eh_code and the old scsi code.
159 * If linux version >= 2.1.101 the default is eh:y, while the eh
160 * option is ignored for previous releases and the old scsi code
161 * is used.
162 *
163 * 18 Apr 1998 Rev. 4.20 for linux 2.0.33 and 2.1.97
164 * Reworked interrupt handler.
165 *
166 * 11 Apr 1998 rev. 4.05 for linux 2.0.33 and 2.1.95
167 * Major reliability improvement: when a batch with overlapping
168 * requests is detected, requests are queued one at a time
169 * eliminating any possible board or drive reordering.
170 *
171 * 10 Apr 1998 rev. 4.04 for linux 2.0.33 and 2.1.95
172 * Improved SMP support (if linux version >= 2.1.95).
173 *
174 * 9 Apr 1998 rev. 4.03 for linux 2.0.33 and 2.1.94
175 * Added support for new PCI code and IO-APIC remapping of irqs.
176 * Performance improvement: when sequential i/o is detected,
177 * always use direct sort instead of reverse sort.
178 *
179 * 4 Apr 1998 rev. 4.02 for linux 2.0.33 and 2.1.92
180 * io_port is now unsigned long.
181 *
182 * 17 Mar 1998 rev. 4.01 for linux 2.0.33 and 2.1.88
183 * Use new scsi error handling code (if linux version >= 2.1.88).
184 * Use new interrupt code.
185 *
186 * 12 Sep 1997 rev. 3.11 for linux 2.0.30 and 2.1.55
187 * Use of udelay inside the wait loops to avoid timeout
188 * problems with fast cpus.
189 * Removed check about useless calls to the interrupt service
190 * routine (reported on SMP systems only).
191 * At initialization time "sorted/unsorted" is displayed instead
192 * of "linked/unlinked" to reinforce the fact that "linking" is
193 * nothing but "elevator sorting" in the actual implementation.
194 *
195 * 17 May 1997 rev. 3.10 for linux 2.0.30 and 2.1.38
196 * Use of serial_number_at_timeout in abort and reset processing.
197 * Use of the __initfunc and __initdata macro in setup code.
198 * Minor cleanups in the list_statistics code.
199 * Increased controller busy timeout in order to better support
200 * slow SCSI devices.
201 *
202 * 24 Feb 1997 rev. 3.00 for linux 2.0.29 and 2.1.26
203 * When loading as a module, parameter passing is now supported
204 * both in 2.0 and in 2.1 style.
205 * Fixed data transfer direction for some SCSI opcodes.
206 * Immediate acknowledge to request sense commands.
207 * Linked commands to each disk device are now reordered by elevator
208 * sorting. Rare cases in which reordering of write requests could
209 * cause wrong results are managed.
210 * Fixed spurious timeouts caused by long simple queue tag sequences.
211 * New command line option (tm:[0-3]) to choose the type of tags:
212 * 0 -> mixed (default); 1 -> simple; 2 -> head; 3 -> ordered.
213 *
214 * 18 Jan 1997 rev. 2.60 for linux 2.1.21 and 2.0.28
215 * Added command line options to enable/disable linked commands
216 * (lc:[y|n]), tagged commands (tc:[y|n]) and to set the max queue
217 * depth (mq:xx). Default is "eata=lc:n,tc:n,mq:16".
218 * Improved command linking.
219 * Documented how to setup RAID-0 with DPT SmartRAID boards.
220 *
221 * 8 Jan 1997 rev. 2.50 for linux 2.1.20 and 2.0.27
222 * Added linked command support.
223 * Improved detection of PCI boards using ISA base addresses.
224 *
225 * 3 Dec 1996 rev. 2.40 for linux 2.1.14 and 2.0.27
226 * Added support for tagged commands and queue depth adjustment.
227 *
228 * 22 Nov 1996 rev. 2.30 for linux 2.1.12 and 2.0.26
229 * When CONFIG_PCI is defined, BIOS32 is used to include in the
230 * list of i/o ports to be probed all the PCI SCSI controllers.
231 * The list of i/o ports to be probed can be overwritten by the
232 * "eata=port0,port1,...." boot command line option.
233 * Scatter/gather lists are now allocated by a number of kmalloc
234 * calls, in order to avoid the previous size limit of 64Kb.
235 *
236 * 16 Nov 1996 rev. 2.20 for linux 2.1.10 and 2.0.25
237 * Added support for EATA 2.0C, PCI, multichannel and wide SCSI.
238 *
239 * 27 Sep 1996 rev. 2.12 for linux 2.1.0
240 * Portability cleanups (virtual/bus addressing, little/big endian
241 * support).
242 *
243 * 09 Jul 1996 rev. 2.11 for linux 2.0.4
244 * Number of internal retries is now limited.
245 *
246 * 16 Apr 1996 rev. 2.10 for linux 1.3.90
247 * New argument "reset_flags" to the reset routine.
248 *
249 * 6 Jul 1995 rev. 2.01 for linux 1.3.7
250 * Update required by the new /proc/scsi support.
251 *
252 * 11 Mar 1995 rev. 2.00 for linux 1.2.0
253 * Fixed a bug which prevented media change detection for removable
254 * disk drives.
255 *
256 * 23 Feb 1995 rev. 1.18 for linux 1.1.94
257 * Added a check for scsi_register returning NULL.
258 *
259 * 11 Feb 1995 rev. 1.17 for linux 1.1.91
260 * Now DEBUG_RESET is disabled by default.
261 * Register a board even if it does not assert DMA protocol support
262 * (DPT SK2011B does not report correctly the dmasup bit).
263 *
264 * 9 Feb 1995 rev. 1.16 for linux 1.1.90
265 * Use host->wish_block instead of host->block.
266 * New list of Data Out SCSI commands.
267 *
268 * 8 Feb 1995 rev. 1.15 for linux 1.1.89
269 * Cleared target_time_out counter while performing a reset.
270 * All external symbols renamed to avoid possible name conflicts.
271 *
272 * 28 Jan 1995 rev. 1.14 for linux 1.1.86
273 * Added module support.
274 * Log and do a retry when a disk drive returns a target status
275 * different from zero on a recovered error.
276 *
277 * 24 Jan 1995 rev. 1.13 for linux 1.1.85
278 * Use optimized board configuration, with a measured performance
279 * increase in the range 10%-20% on i/o throughput.
280 *
281 * 16 Jan 1995 rev. 1.12 for linux 1.1.81
282 * Fix mscp structure comments (no functional change).
283 * Display a message if check_region detects a port address
284 * already in use.
285 *
286 * 17 Dec 1994 rev. 1.11 for linux 1.1.74
287 * Use the scsicam_bios_param routine. This allows an easy
288 * migration path from disk partition tables created using
289 * different SCSI drivers and non optimal disk geometry.
290 *
291 * 15 Dec 1994 rev. 1.10 for linux 1.1.74
292 * Added support for ISA EATA boards (DPT PM2011, DPT PM2021).
293 * The host->block flag is set for all the detected ISA boards.
294 * The detect routine no longer enforces LEVEL triggering
295 * for EISA boards, it just prints a warning message.
296 *
297 * 30 Nov 1994 rev. 1.09 for linux 1.1.68
298 * Redo i/o on target status CHECK_CONDITION for TYPE_DISK only.
299 * Added optional support for using a single board at a time.
300 *
301 * 18 Nov 1994 rev. 1.08 for linux 1.1.64
302 * Forces sg_tablesize = 64 and can_queue = 64 if these
303 * values are not correctly detected (DPT PM2012).
304 *
305 * 14 Nov 1994 rev. 1.07 for linux 1.1.63 Final BETA release.
306 * 04 Aug 1994 rev. 1.00 for linux 1.1.39 First BETA release.
307 *
308 *
309 * This driver is based on the CAM (Common Access Method Committee)
310 * EATA (Enhanced AT Bus Attachment) rev. 2.0A, using DMA protocol.
311 *
312 * Copyright (C) 1994-2003 Dario Ballabio (ballabio_dario@emc.com)
313 *
314 * Alternate email: dario.ballabio@inwind.it, dario.ballabio@tiscalinet.it
315 *
316 * Redistribution and use in source and binary forms, with or without
317 * modification, are permitted provided that redistributions of source
318 * code retain the above copyright notice and this comment without
319 * modification.
320 *
321 */
322
323 /*
324 *
325 * Here is a brief description of the DPT SCSI host adapters.
326 * All these boards provide an EATA/DMA compatible programming interface
327 * and are fully supported by this driver in any configuration, including
328 * multiple SCSI channels:
329 *
330 * PM2011B/9X - Entry Level ISA
331 * PM2021A/9X - High Performance ISA
332 * PM2012A Old EISA
333 * PM2012B Old EISA
334 * PM2022A/9X - Entry Level EISA
335 * PM2122A/9X - High Performance EISA
336 * PM2322A/9X - Extra High Performance EISA
337 * PM3021 - SmartRAID Adapter for ISA
338 * PM3222 - SmartRAID Adapter for EISA (PM3222W is 16-bit wide SCSI)
339 * PM3224 - SmartRAID Adapter for PCI (PM3224W is 16-bit wide SCSI)
340 * PM33340UW - SmartRAID Adapter for PCI ultra wide multichannel
341 *
342 * The above list is just an indication: as a matter of fact all DPT
343 * boards using the EATA/DMA protocol are supported by this driver,
344 * since they use exactely the same programming interface.
345 *
346 * The DPT PM2001 provides only the EATA/PIO interface and hence is not
347 * supported by this driver.
348 *
349 * This code has been tested with up to 3 Distributed Processing Technology
350 * PM2122A/9X (DPT SCSI BIOS v002.D1, firmware v05E.0) EISA controllers,
351 * in any combination of private and shared IRQ.
352 * PCI support has been tested using up to 2 DPT PM3224W (DPT SCSI BIOS
353 * v003.D0, firmware v07G.0).
354 *
355 * DPT SmartRAID boards support "Hardware Array" - a group of disk drives
356 * which are all members of the same RAID-0, RAID-1 or RAID-5 array implemented
357 * in host adapter hardware. Hardware Arrays are fully compatible with this
358 * driver, since they look to it as a single disk drive.
359 *
360 * WARNING: to create a RAID-0 "Hardware Array" you must select "Other Unix"
361 * as the current OS in the DPTMGR "Initial System Installation" menu.
362 * Otherwise RAID-0 is generated as an "Array Group" (i.e. software RAID-0),
363 * which is not supported by the actual SCSI subsystem.
364 * To get the "Array Group" functionality, the Linux MD driver must be used
365 * instead of the DPT "Array Group" feature.
366 *
367 * Multiple ISA, EISA and PCI boards can be configured in the same system.
368 * It is suggested to put all the EISA boards on the same IRQ level, all
369 * the PCI boards on another IRQ level, while ISA boards cannot share
370 * interrupts.
371 *
372 * If you configure multiple boards on the same IRQ, the interrupt must
373 * be _level_ triggered (not _edge_ triggered).
374 *
375 * This driver detects EATA boards by probes at fixed port addresses,
376 * so no BIOS32 or PCI BIOS support is required.
377 * The suggested way to detect a generic EATA PCI board is to force on it
378 * any unused EISA address, even if there are other controllers on the EISA
379 * bus, or even if you system has no EISA bus at all.
380 * Do not force any ISA address on EATA PCI boards.
381 *
382 * If PCI bios support is configured into the kernel, BIOS32 is used to
383 * include in the list of i/o ports to be probed all the PCI SCSI controllers.
384 *
385 * Due to a DPT BIOS "feature", it might not be possible to force an EISA
386 * address on more than a single DPT PCI board, so in this case you have to
387 * let the PCI BIOS assign the addresses.
388 *
389 * The sequence of detection probes is:
390 *
391 * - ISA 0x1F0;
392 * - PCI SCSI controllers (only if BIOS32 is available);
393 * - EISA/PCI 0x1C88 through 0xFC88 (corresponding to EISA slots 1 to 15);
394 * - ISA 0x170, 0x230, 0x330.
395 *
396 * The above list of detection probes can be totally replaced by the
397 * boot command line option: "eata=port0,port1,port2,...", where the
398 * port0, port1... arguments are ISA/EISA/PCI addresses to be probed.
399 * For example using "eata=0x7410,0x7450,0x230", the driver probes
400 * only the two PCI addresses 0x7410 and 0x7450 and the ISA address 0x230,
401 * in this order; "eata=0" totally disables this driver.
402 *
403 * After the optional list of detection probes, other possible command line
404 * options are:
405 *
406 * et:y force use of extended translation (255 heads, 63 sectors);
407 * et:n use disk geometry detected by scsicam_bios_param;
408 * rs:y reverse scan order while detecting PCI boards;
409 * rs:n use BIOS order while detecting PCI boards;
410 * lc:y enables linked commands;
411 * lc:n disables linked commands;
412 * tm:0 disables tagged commands (same as tc:n);
413 * tm:1 use simple queue tags (same as tc:y);
414 * tm:2 use ordered queue tags (same as tc:2);
415 * mq:xx set the max queue depth to the value xx (2 <= xx <= 32).
416 *
417 * The default value is: "eata=lc:n,mq:16,tm:0,et:n,rs:n".
418 * An example using the list of detection probes could be:
419 * "eata=0x7410,0x230,lc:y,tm:2,mq:4,et:n".
420 *
421 * When loading as a module, parameters can be specified as well.
422 * The above example would be (use 1 in place of y and 0 in place of n):
423 *
424 * modprobe eata io_port=0x7410,0x230 linked_comm=1 \
425 * max_queue_depth=4 ext_tran=0 tag_mode=2 \
426 * rev_scan=1
427 *
428 * ----------------------------------------------------------------------------
429 * In this implementation, linked commands are designed to work with any DISK
430 * or CD-ROM, since this linking has only the intent of clustering (time-wise)
431 * and reordering by elevator sorting commands directed to each device,
432 * without any relation with the actual SCSI protocol between the controller
433 * and the device.
434 * If Q is the queue depth reported at boot time for each device (also named
435 * cmds/lun) and Q > 2, whenever there is already an active command to the
436 * device all other commands to the same device (up to Q-1) are kept waiting
437 * in the elevator sorting queue. When the active command completes, the
438 * commands in this queue are sorted by sector address. The sort is chosen
439 * between increasing or decreasing by minimizing the seek distance between
440 * the sector of the commands just completed and the sector of the first
441 * command in the list to be sorted.
442 * Trivial math assures that the unsorted average seek distance when doing
443 * random seeks over S sectors is S/3.
444 * When (Q-1) requests are uniformly distributed over S sectors, the average
445 * distance between two adjacent requests is S/((Q-1) + 1), so the sorted
446 * average seek distance for (Q-1) random requests over S sectors is S/Q.
447 * The elevator sorting hence divides the seek distance by a factor Q/3.
448 * The above pure geometric remarks are valid in all cases and the
449 * driver effectively reduces the seek distance by the predicted factor
450 * when there are Q concurrent read i/o operations on the device, but this
451 * does not necessarily results in a noticeable performance improvement:
452 * your mileage may vary....
453 *
454 * Note: command reordering inside a batch of queued commands could cause
455 * wrong results only if there is at least one write request and the
456 * intersection (sector-wise) of all requests is not empty.
457 * When the driver detects a batch including overlapping requests
458 * (a really rare event) strict serial (pid) order is enforced.
459 * ----------------------------------------------------------------------------
460 * The extended translation option (et:y) is useful when using large physical
461 * disks/arrays. It could also be useful when switching between Adaptec boards
462 * and DPT boards without reformatting the disk.
463 * When a boot disk is partitioned with extended translation, in order to
464 * be able to boot it with a DPT board is could be necessary to add to
465 * lilo.conf additional commands as in the following example:
466 *
467 * fix-table
468 * disk=/dev/sda bios=0x80 sectors=63 heads=128 cylindres=546
469 *
470 * where the above geometry should be replaced with the one reported at
471 * power up by the DPT controller.
472 * ----------------------------------------------------------------------------
473 *
474 * The boards are named EATA0, EATA1,... according to the detection order.
475 *
476 * In order to support multiple ISA boards in a reliable way,
477 * the driver sets host->wish_block = 1 for all ISA boards.
478 */
479
480 #include <linux/config.h>
481 #include <linux/string.h>
482 #include <linux/kernel.h>
483 #include <linux/ioport.h>
484 #include <linux/delay.h>
485 #include <linux/proc_fs.h>
486 #include <linux/blkdev.h>
487 #include <linux/interrupt.h>
488 #include <linux/stat.h>
489 #include <linux/pci.h>
490 #include <linux/init.h>
491 #include <linux/ctype.h>
492 #include <linux/spinlock.h>
493 #include <linux/dma-mapping.h>
494 #include <asm/byteorder.h>
495 #include <asm/dma.h>
496 #include <asm/io.h>
497 #include <asm/irq.h>
498
499 #include <scsi/scsi.h>
500 #include <scsi/scsi_cmnd.h>
501 #include <scsi/scsi_device.h>
502 #include <scsi/scsi_host.h>
503 #include <scsi/scsi_tcq.h>
504 #include <scsi/scsicam.h>
505
506 static int eata2x_detect(struct scsi_host_template *);
507 static int eata2x_release(struct Scsi_Host *);
508 static int eata2x_queuecommand(struct scsi_cmnd *,
509 void (*done) (struct scsi_cmnd *));
510 static int eata2x_eh_abort(struct scsi_cmnd *);
511 static int eata2x_eh_host_reset(struct scsi_cmnd *);
512 static int eata2x_bios_param(struct scsi_device *, struct block_device *,
513 sector_t, int *);
514 static int eata2x_slave_configure(struct scsi_device *);
515
516 static struct scsi_host_template driver_template = {
517 .name = "EATA/DMA 2.0x rev. 8.10.00 ",
518 .detect = eata2x_detect,
519 .release = eata2x_release,
520 .queuecommand = eata2x_queuecommand,
521 .eh_abort_handler = eata2x_eh_abort,
522 .eh_host_reset_handler = eata2x_eh_host_reset,
523 .bios_param = eata2x_bios_param,
524 .slave_configure = eata2x_slave_configure,
525 .this_id = 7,
526 .unchecked_isa_dma = 1,
527 .use_clustering = ENABLE_CLUSTERING
528 };
529
530 #if !defined(__BIG_ENDIAN_BITFIELD) && !defined(__LITTLE_ENDIAN_BITFIELD)
531 #error "Adjust your <asm/byteorder.h> defines"
532 #endif
533
534 /* Subversion values */
535 #define ISA 0
536 #define ESA 1
537
538 #undef FORCE_CONFIG
539
540 #undef DEBUG_LINKED_COMMANDS
541 #undef DEBUG_DETECT
542 #undef DEBUG_PCI_DETECT
543 #undef DEBUG_INTERRUPT
544 #undef DEBUG_RESET
545 #undef DEBUG_GENERATE_ERRORS
546 #undef DEBUG_GENERATE_ABORTS
547 #undef DEBUG_GEOMETRY
548
549 #define MAX_ISA 4
550 #define MAX_VESA 0
551 #define MAX_EISA 15
552 #define MAX_PCI 16
553 #define MAX_BOARDS (MAX_ISA + MAX_VESA + MAX_EISA + MAX_PCI)
554 #define MAX_CHANNEL 4
555 #define MAX_LUN 32
556 #define MAX_TARGET 32
557 #define MAX_MAILBOXES 64
558 #define MAX_SGLIST 64
559 #define MAX_LARGE_SGLIST 122
560 #define MAX_INTERNAL_RETRIES 64
561 #define MAX_CMD_PER_LUN 2
562 #define MAX_TAGGED_CMD_PER_LUN (MAX_MAILBOXES - MAX_CMD_PER_LUN)
563
564 #define SKIP ULONG_MAX
565 #define FREE 0
566 #define IN_USE 1
567 #define LOCKED 2
568 #define IN_RESET 3
569 #define IGNORE 4
570 #define READY 5
571 #define ABORTING 6
572 #define NO_DMA 0xff
573 #define MAXLOOP 10000
574 #define TAG_DISABLED 0
575 #define TAG_SIMPLE 1
576 #define TAG_ORDERED 2
577
578 #define REG_CMD 7
579 #define REG_STATUS 7
580 #define REG_AUX_STATUS 8
581 #define REG_DATA 0
582 #define REG_DATA2 1
583 #define REG_SEE 6
584 #define REG_LOW 2
585 #define REG_LM 3
586 #define REG_MID 4
587 #define REG_MSB 5
588 #define REGION_SIZE 9UL
589 #define MAX_ISA_ADDR 0x03ff
590 #define MIN_EISA_ADDR 0x1c88
591 #define MAX_EISA_ADDR 0xfc88
592 #define BSY_ASSERTED 0x80
593 #define DRQ_ASSERTED 0x08
594 #define ABSY_ASSERTED 0x01
595 #define IRQ_ASSERTED 0x02
596 #define READ_CONFIG_PIO 0xf0
597 #define SET_CONFIG_PIO 0xf1
598 #define SEND_CP_PIO 0xf2
599 #define RECEIVE_SP_PIO 0xf3
600 #define TRUNCATE_XFR_PIO 0xf4
601 #define RESET_PIO 0xf9
602 #define READ_CONFIG_DMA 0xfd
603 #define SET_CONFIG_DMA 0xfe
604 #define SEND_CP_DMA 0xff
605 #define ASOK 0x00
606 #define ASST 0x01
607
608 #define YESNO(a) ((a) ? 'y' : 'n')
609 #define TLDEV(type) ((type) == TYPE_DISK || (type) == TYPE_ROM)
610
611 /* "EATA", in Big Endian format */
612 #define EATA_SIG_BE 0x45415441
613
614 /* Number of valid bytes in the board config structure for EATA 2.0x */
615 #define EATA_2_0A_SIZE 28
616 #define EATA_2_0B_SIZE 30
617 #define EATA_2_0C_SIZE 34
618
619 /* Board info structure */
620 struct eata_info {
621 u_int32_t data_len; /* Number of valid bytes after this field */
622 u_int32_t sign; /* ASCII "EATA" signature */
623
624 #if defined(__BIG_ENDIAN_BITFIELD)
625 unchar version : 4,
626 : 4;
627 unchar haaval : 1,
628 ata : 1,
629 drqvld : 1,
630 dmasup : 1,
631 morsup : 1,
632 trnxfr : 1,
633 tarsup : 1,
634 ocsena : 1;
635 #else
636 unchar : 4, /* unused low nibble */
637 version : 4; /* EATA version, should be 0x1 */
638 unchar ocsena : 1, /* Overlap Command Support Enabled */
639 tarsup : 1, /* Target Mode Supported */
640 trnxfr : 1, /* Truncate Transfer Cmd NOT Necessary */
641 morsup : 1, /* More Supported */
642 dmasup : 1, /* DMA Supported */
643 drqvld : 1, /* DRQ Index (DRQX) is valid */
644 ata : 1, /* This is an ATA device */
645 haaval : 1; /* Host Adapter Address Valid */
646 #endif
647
648 ushort cp_pad_len; /* Number of pad bytes after cp_len */
649 unchar host_addr[4]; /* Host Adapter SCSI ID for channels 3, 2, 1, 0 */
650 u_int32_t cp_len; /* Number of valid bytes in cp */
651 u_int32_t sp_len; /* Number of valid bytes in sp */
652 ushort queue_size; /* Max number of cp that can be queued */
653 ushort unused;
654 ushort scatt_size; /* Max number of entries in scatter/gather table */
655
656 #if defined(__BIG_ENDIAN_BITFIELD)
657 unchar drqx : 2,
658 second : 1,
659 irq_tr : 1,
660 irq : 4;
661 unchar sync;
662 unchar : 4,
663 res1 : 1,
664 large_sg : 1,
665 forcaddr : 1,
666 isaena : 1;
667 unchar max_chan : 3,
668 max_id : 5;
669 unchar max_lun;
670 unchar eisa : 1,
671 pci : 1,
672 idquest : 1,
673 m1 : 1,
674 : 4;
675 #else
676 unchar irq : 4, /* Interrupt Request assigned to this controller */
677 irq_tr : 1, /* 0 for edge triggered, 1 for level triggered */
678 second : 1, /* 1 if this is a secondary (not primary) controller */
679 drqx : 2; /* DRQ Index (0=DMA0, 1=DMA7, 2=DMA6, 3=DMA5) */
680 unchar sync; /* 1 if scsi target id 7...0 is running sync scsi */
681
682 /* Structure extension defined in EATA 2.0B */
683 unchar isaena : 1, /* ISA i/o addressing is disabled/enabled */
684 forcaddr : 1, /* Port address has been forced */
685 large_sg : 1, /* 1 if large SG lists are supported */
686 res1 : 1,
687 : 4;
688 unchar max_id : 5, /* Max SCSI target ID number */
689 max_chan : 3; /* Max SCSI channel number on this board */
690
691 /* Structure extension defined in EATA 2.0C */
692 unchar max_lun; /* Max SCSI LUN number */
693 unchar
694 : 4,
695 m1 : 1, /* This is a PCI with an M1 chip installed */
696 idquest : 1, /* RAIDNUM returned is questionable */
697 pci : 1, /* This board is PCI */
698 eisa : 1; /* This board is EISA */
699 #endif
700
701 unchar raidnum; /* Uniquely identifies this HBA in a system */
702 unchar notused;
703
704 ushort ipad[247];
705 };
706
707 /* Board config structure */
708 struct eata_config {
709 ushort len; /* Number of bytes following this field */
710
711 #if defined(__BIG_ENDIAN_BITFIELD)
712 unchar : 4,
713 tarena : 1,
714 mdpena : 1,
715 ocena : 1,
716 edis : 1;
717 #else
718 unchar edis : 1, /* Disable EATA interface after config command */
719 ocena : 1, /* Overlapped Commands Enabled */
720 mdpena : 1, /* Transfer all Modified Data Pointer Messages */
721 tarena : 1, /* Target Mode Enabled for this controller */
722 : 4;
723 #endif
724 unchar cpad[511];
725 };
726
727 /* Returned status packet structure */
728 struct mssp {
729 #if defined(__BIG_ENDIAN_BITFIELD)
730 unchar eoc : 1,
731 adapter_status : 7;
732 #else
733 unchar adapter_status : 7, /* State related to current command */
734 eoc : 1; /* End Of Command (1 = command completed) */
735 #endif
736 unchar target_status; /* SCSI status received after data transfer */
737 unchar unused[2];
738 u_int32_t inv_res_len; /* Number of bytes not transferred */
739 u_int32_t cpp_index; /* Index of address set in cp */
740 char mess[12];
741 };
742
743 struct sg_list {
744 unsigned int address; /* Segment Address */
745 unsigned int num_bytes; /* Segment Length */
746 };
747
748 /* MailBox SCSI Command Packet */
749 struct mscp {
750 #if defined(__BIG_ENDIAN_BITFIELD)
751 unchar din : 1,
752 dout : 1,
753 interp : 1,
754 : 1,
755 sg : 1,
756 reqsen :1,
757 init : 1,
758 sreset : 1;
759 unchar sense_len;
760 unchar unused[3];
761 unchar : 7,
762 fwnest : 1;
763 unchar : 5,
764 hbaci : 1,
765 iat : 1,
766 phsunit : 1;
767 unchar channel : 3,
768 target : 5;
769 unchar one : 1,
770 dispri : 1,
771 luntar : 1,
772 lun : 5;
773 #else
774 unchar sreset :1, /* SCSI Bus Reset Signal should be asserted */
775 init :1, /* Re-initialize controller and self test */
776 reqsen :1, /* Transfer Request Sense Data to addr using DMA */
777 sg :1, /* Use Scatter/Gather */
778 :1,
779 interp :1, /* The controller interprets cp, not the target */
780 dout :1, /* Direction of Transfer is Out (Host to Target) */
781 din :1; /* Direction of Transfer is In (Target to Host) */
782 unchar sense_len; /* Request Sense Length */
783 unchar unused[3];
784 unchar fwnest : 1, /* Send command to a component of an Array Group */
785 : 7;
786 unchar phsunit : 1, /* Send to Target Physical Unit (bypass RAID) */
787 iat : 1, /* Inhibit Address Translation */
788 hbaci : 1, /* Inhibit HBA Caching for this command */
789 : 5;
790 unchar target : 5, /* SCSI target ID */
791 channel : 3; /* SCSI channel number */
792 unchar lun : 5, /* SCSI logical unit number */
793 luntar : 1, /* This cp is for Target (not LUN) */
794 dispri : 1, /* Disconnect Privilege granted */
795 one : 1; /* 1 */
796 #endif
797
798 unchar mess[3]; /* Massage to/from Target */
799 unchar cdb[12]; /* Command Descriptor Block */
800 u_int32_t data_len; /* If sg=0 Data Length, if sg=1 sglist length */
801 u_int32_t cpp_index; /* Index of address to be returned in sp */
802 u_int32_t data_address; /* If sg=0 Data Address, if sg=1 sglist address */
803 u_int32_t sp_dma_addr; /* Address where sp is DMA'ed when cp completes */
804 u_int32_t sense_addr; /* Address where Sense Data is DMA'ed on error */
805
806 /* Additional fields begin here. */
807 struct scsi_cmnd *SCpnt;
808
809 /* All the cp structure is zero filled by queuecommand except the
810 following CP_TAIL_SIZE bytes, initialized by detect */
811 dma_addr_t cp_dma_addr; /* dma handle for this cp structure */
812 struct sg_list *sglist; /* pointer to the allocated SG list */
813 };
814
815 #define CP_TAIL_SIZE (sizeof(struct sglist *) + sizeof(dma_addr_t))
816
817 struct hostdata {
818 struct mscp cp[MAX_MAILBOXES]; /* Mailboxes for this board */
819 unsigned int cp_stat[MAX_MAILBOXES]; /* FREE, IN_USE, LOCKED, IN_RESET */
820 unsigned int last_cp_used; /* Index of last mailbox used */
821 unsigned int iocount; /* Total i/o done for this board */
822 int board_number; /* Number of this board */
823 char board_name[16]; /* Name of this board */
824 int in_reset; /* True if board is doing a reset */
825 int target_to[MAX_TARGET][MAX_CHANNEL]; /* N. of timeout errors on target */
826 int target_redo[MAX_TARGET][MAX_CHANNEL]; /* If 1 redo i/o on target */
827 unsigned int retries; /* Number of internal retries */
828 unsigned long last_retried_pid; /* Pid of last retried command */
829 unsigned char subversion; /* Bus type, either ISA or EISA/PCI */
830 unsigned char protocol_rev; /* EATA 2.0 rev., 'A' or 'B' or 'C' */
831 unsigned char is_pci; /* 1 is bus type is PCI */
832 struct pci_dev *pdev; /* pdev for PCI bus, NULL otherwise */
833 struct mssp *sp_cpu_addr; /* cpu addr for DMA buffer sp */
834 dma_addr_t sp_dma_addr; /* dma handle for DMA buffer sp */
835 struct mssp sp; /* Local copy of sp buffer */
836 };
837
838 static struct Scsi_Host *sh[MAX_BOARDS];
839 static const char *driver_name = "EATA";
840 static char sha[MAX_BOARDS];
841 static DEFINE_SPINLOCK(driver_lock);
842
843 /* Initialize num_boards so that ihdlr can work while detect is in progress */
844 static unsigned int num_boards = MAX_BOARDS;
845
846 static unsigned long io_port[] = {
847
848 /* Space for MAX_INT_PARAM ports usable while loading as a module */
849 SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP,
850 SKIP, SKIP,
851
852 /* First ISA */
853 0x1f0,
854
855 /* Space for MAX_PCI ports possibly reported by PCI_BIOS */
856 SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP,
857 SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP,
858
859 /* MAX_EISA ports */
860 0x1c88, 0x2c88, 0x3c88, 0x4c88, 0x5c88, 0x6c88, 0x7c88, 0x8c88,
861 0x9c88, 0xac88, 0xbc88, 0xcc88, 0xdc88, 0xec88, 0xfc88,
862
863 /* Other (MAX_ISA - 1) ports */
864 0x170, 0x230, 0x330,
865
866 /* End of list */
867 0x0
868 };
869
870 /* Device is Big Endian */
871 #define H2DEV(x) cpu_to_be32(x)
872 #define DEV2H(x) be32_to_cpu(x)
873 #define H2DEV16(x) cpu_to_be16(x)
874 #define DEV2H16(x) be16_to_cpu(x)
875
876 /* But transfer orientation from the 16 bit data register is Little Endian */
877 #define REG2H(x) le16_to_cpu(x)
878
879 static irqreturn_t do_interrupt_handler(int, void *, struct pt_regs *);
880 static void flush_dev(struct scsi_device *, unsigned long, struct hostdata *,
881 unsigned int);
882 static int do_trace = 0;
883 static int setup_done = 0;
884 static int link_statistics;
885 static int ext_tran = 0;
886 static int rev_scan = 1;
887
888 #if defined(CONFIG_SCSI_EATA_TAGGED_QUEUE)
889 static int tag_mode = TAG_SIMPLE;
890 #else
891 static int tag_mode = TAG_DISABLED;
892 #endif
893
894 #if defined(CONFIG_SCSI_EATA_LINKED_COMMANDS)
895 static int linked_comm = 1;
896 #else
897 static int linked_comm = 0;
898 #endif
899
900 #if defined(CONFIG_SCSI_EATA_MAX_TAGS)
901 static int max_queue_depth = CONFIG_SCSI_EATA_MAX_TAGS;
902 #else
903 static int max_queue_depth = MAX_CMD_PER_LUN;
904 #endif
905
906 #if defined(CONFIG_ISA)
907 static int isa_probe = 1;
908 #else
909 static int isa_probe = 0;
910 #endif
911
912 #if defined(CONFIG_EISA)
913 static int eisa_probe = 1;
914 #else
915 static int eisa_probe = 0;
916 #endif
917
918 #if defined(CONFIG_PCI)
919 static int pci_probe = 1;
920 #else
921 static int pci_probe = 0;
922 #endif
923
924 #define MAX_INT_PARAM 10
925 #define MAX_BOOT_OPTIONS_SIZE 256
926 static char boot_options[MAX_BOOT_OPTIONS_SIZE];
927
928 #if defined(MODULE)
929 #include <linux/module.h>
930 #include <linux/moduleparam.h>
931
932 module_param_string(eata, boot_options, MAX_BOOT_OPTIONS_SIZE, 0);
933 MODULE_PARM_DESC(eata, " equivalent to the \"eata=...\" kernel boot option."
934 " Example: modprobe eata \"eata=0x7410,0x230,lc:y,tm:0,mq:4,ep:n\"");
935 MODULE_AUTHOR("Dario Ballabio");
936 MODULE_LICENSE("GPL");
937 MODULE_DESCRIPTION("EATA/DMA SCSI Driver");
938
939 #endif
940
941 static int eata2x_slave_configure(struct scsi_device *dev)
942 {
943 int tqd, utqd;
944 char *tag_suffix, *link_suffix;
945
946 utqd = MAX_CMD_PER_LUN;
947 tqd = max_queue_depth;
948
949 if (TLDEV(dev->type) && dev->tagged_supported) {
950 if (tag_mode == TAG_SIMPLE) {
951 scsi_adjust_queue_depth(dev, MSG_SIMPLE_TAG, tqd);
952 tag_suffix = ", simple tags";
953 } else if (tag_mode == TAG_ORDERED) {
954 scsi_adjust_queue_depth(dev, MSG_ORDERED_TAG, tqd);
955 tag_suffix = ", ordered tags";
956 } else {
957 scsi_adjust_queue_depth(dev, 0, tqd);
958 tag_suffix = ", no tags";
959 }
960 } else if (TLDEV(dev->type) && linked_comm) {
961 scsi_adjust_queue_depth(dev, 0, tqd);
962 tag_suffix = ", untagged";
963 } else {
964 scsi_adjust_queue_depth(dev, 0, utqd);
965 tag_suffix = "";
966 }
967
968 if (TLDEV(dev->type) && linked_comm && dev->queue_depth > 2)
969 link_suffix = ", sorted";
970 else if (TLDEV(dev->type))
971 link_suffix = ", unsorted";
972 else
973 link_suffix = "";
974
975 sdev_printk(KERN_INFO, dev,
976 "cmds/lun %d%s%s.\n",
977 dev->queue_depth, link_suffix, tag_suffix);
978
979 return 0;
980 }
981
982 static int wait_on_busy(unsigned long iobase, unsigned int loop)
983 {
984 while (inb(iobase + REG_AUX_STATUS) & ABSY_ASSERTED) {
985 udelay(1L);
986 if (--loop == 0)
987 return 1;
988 }
989 return 0;
990 }
991
992 static int do_dma(unsigned long iobase, unsigned long addr, unchar cmd)
993 {
994 unsigned char *byaddr;
995 unsigned long devaddr;
996
997 if (wait_on_busy(iobase, (addr ? MAXLOOP * 100 : MAXLOOP)))
998 return 1;
999
1000 if (addr) {
1001 devaddr = H2DEV(addr);
1002 byaddr = (unsigned char *)&devaddr;
1003 outb(byaddr[3], iobase + REG_LOW);
1004 outb(byaddr[2], iobase + REG_LM);
1005 outb(byaddr[1], iobase + REG_MID);
1006 outb(byaddr[0], iobase + REG_MSB);
1007 }
1008
1009 outb(cmd, iobase + REG_CMD);
1010 return 0;
1011 }
1012
1013 static int read_pio(unsigned long iobase, ushort * start, ushort * end)
1014 {
1015 unsigned int loop = MAXLOOP;
1016 ushort *p;
1017
1018 for (p = start; p <= end; p++) {
1019 while (!(inb(iobase + REG_STATUS) & DRQ_ASSERTED)) {
1020 udelay(1L);
1021 if (--loop == 0)
1022 return 1;
1023 }
1024 loop = MAXLOOP;
1025 *p = REG2H(inw(iobase));
1026 }
1027
1028 return 0;
1029 }
1030
1031 static struct pci_dev *get_pci_dev(unsigned long port_base)
1032 {
1033 #if defined(CONFIG_PCI)
1034 unsigned int addr;
1035 struct pci_dev *dev = NULL;
1036
1037 while ((dev = pci_get_class(PCI_CLASS_STORAGE_SCSI << 8, dev))) {
1038 addr = pci_resource_start(dev, 0);
1039
1040 #if defined(DEBUG_PCI_DETECT)
1041 printk("%s: get_pci_dev, bus %d, devfn 0x%x, addr 0x%x.\n",
1042 driver_name, dev->bus->number, dev->devfn, addr);
1043 #endif
1044
1045 /* we are in so much trouble for a pci hotplug system with this driver
1046 * anyway, so doing this at least lets people unload the driver and not
1047 * cause memory problems, but in general this is a bad thing to do (this
1048 * driver needs to be converted to the proper PCI api someday... */
1049 pci_dev_put(dev);
1050 if (addr + PCI_BASE_ADDRESS_0 == port_base)
1051 return dev;
1052 }
1053 #endif /* end CONFIG_PCI */
1054 return NULL;
1055 }
1056
1057 static void enable_pci_ports(void)
1058 {
1059 #if defined(CONFIG_PCI)
1060 struct pci_dev *dev = NULL;
1061
1062 while ((dev = pci_get_class(PCI_CLASS_STORAGE_SCSI << 8, dev))) {
1063 #if defined(DEBUG_PCI_DETECT)
1064 printk("%s: enable_pci_ports, bus %d, devfn 0x%x.\n",
1065 driver_name, dev->bus->number, dev->devfn);
1066 #endif
1067
1068 if (pci_enable_device(dev))
1069 printk
1070 ("%s: warning, pci_enable_device failed, bus %d devfn 0x%x.\n",
1071 driver_name, dev->bus->number, dev->devfn);
1072 }
1073
1074 #endif /* end CONFIG_PCI */
1075 }
1076
1077 static int port_detect(unsigned long port_base, unsigned int j,
1078 struct scsi_host_template *tpnt)
1079 {
1080 unsigned char irq, dma_channel, subversion, i, is_pci = 0;
1081 unsigned char protocol_rev;
1082 struct eata_info info;
1083 char *bus_type, dma_name[16];
1084 struct pci_dev *pdev;
1085 /* Allowed DMA channels for ISA (0 indicates reserved) */
1086 unsigned char dma_channel_table[4] = { 5, 6, 7, 0 };
1087 struct Scsi_Host *shost;
1088 struct hostdata *ha;
1089 char name[16];
1090
1091 sprintf(name, "%s%d", driver_name, j);
1092
1093 if (!request_region(port_base, REGION_SIZE, driver_name)) {
1094 #if defined(DEBUG_DETECT)
1095 printk("%s: address 0x%03lx in use, skipping probe.\n", name,
1096 port_base);
1097 #endif
1098 goto fail;
1099 }
1100
1101 spin_lock_irq(&driver_lock);
1102
1103 if (do_dma(port_base, 0, READ_CONFIG_PIO)) {
1104 #if defined(DEBUG_DETECT)
1105 printk("%s: detect, do_dma failed at 0x%03lx.\n", name,
1106 port_base);
1107 #endif
1108 goto freelock;
1109 }
1110
1111 /* Read the info structure */
1112 if (read_pio(port_base, (ushort *) & info, (ushort *) & info.ipad[0])) {
1113 #if defined(DEBUG_DETECT)
1114 printk("%s: detect, read_pio failed at 0x%03lx.\n", name,
1115 port_base);
1116 #endif
1117 goto freelock;
1118 }
1119
1120 info.data_len = DEV2H(info.data_len);
1121 info.sign = DEV2H(info.sign);
1122 info.cp_pad_len = DEV2H16(info.cp_pad_len);
1123 info.cp_len = DEV2H(info.cp_len);
1124 info.sp_len = DEV2H(info.sp_len);
1125 info.scatt_size = DEV2H16(info.scatt_size);
1126 info.queue_size = DEV2H16(info.queue_size);
1127
1128 /* Check the controller "EATA" signature */
1129 if (info.sign != EATA_SIG_BE) {
1130 #if defined(DEBUG_DETECT)
1131 printk("%s: signature 0x%04x discarded.\n", name, info.sign);
1132 #endif
1133 goto freelock;
1134 }
1135
1136 if (info.data_len < EATA_2_0A_SIZE) {
1137 printk
1138 ("%s: config structure size (%d bytes) too short, detaching.\n",
1139 name, info.data_len);
1140 goto freelock;
1141 } else if (info.data_len == EATA_2_0A_SIZE)
1142 protocol_rev = 'A';
1143 else if (info.data_len == EATA_2_0B_SIZE)
1144 protocol_rev = 'B';
1145 else
1146 protocol_rev = 'C';
1147
1148 if (protocol_rev != 'A' && info.forcaddr) {
1149 printk("%s: warning, port address has been forced.\n", name);
1150 bus_type = "PCI";
1151 is_pci = 1;
1152 subversion = ESA;
1153 } else if (port_base > MAX_EISA_ADDR
1154 || (protocol_rev == 'C' && info.pci)) {
1155 bus_type = "PCI";
1156 is_pci = 1;
1157 subversion = ESA;
1158 } else if (port_base >= MIN_EISA_ADDR
1159 || (protocol_rev == 'C' && info.eisa)) {
1160 bus_type = "EISA";
1161 subversion = ESA;
1162 } else if (protocol_rev == 'C' && !info.eisa && !info.pci) {
1163 bus_type = "ISA";
1164 subversion = ISA;
1165 } else if (port_base > MAX_ISA_ADDR) {
1166 bus_type = "PCI";
1167 is_pci = 1;
1168 subversion = ESA;
1169 } else {
1170 bus_type = "ISA";
1171 subversion = ISA;
1172 }
1173
1174 if (!info.haaval || info.ata) {
1175 printk
1176 ("%s: address 0x%03lx, unusable %s board (%d%d), detaching.\n",
1177 name, port_base, bus_type, info.haaval, info.ata);
1178 goto freelock;
1179 }
1180
1181 if (info.drqvld) {
1182 if (subversion == ESA)
1183 printk("%s: warning, weird %s board using DMA.\n", name,
1184 bus_type);
1185
1186 subversion = ISA;
1187 dma_channel = dma_channel_table[3 - info.drqx];
1188 } else {
1189 if (subversion == ISA)
1190 printk("%s: warning, weird %s board not using DMA.\n",
1191 name, bus_type);
1192
1193 subversion = ESA;
1194 dma_channel = NO_DMA;
1195 }
1196
1197 if (!info.dmasup)
1198 printk("%s: warning, DMA protocol support not asserted.\n",
1199 name);
1200
1201 irq = info.irq;
1202
1203 if (subversion == ESA && !info.irq_tr)
1204 printk
1205 ("%s: warning, LEVEL triggering is suggested for IRQ %u.\n",
1206 name, irq);
1207
1208 if (is_pci) {
1209 pdev = get_pci_dev(port_base);
1210 if (!pdev)
1211 printk
1212 ("%s: warning, failed to get pci_dev structure.\n",
1213 name);
1214 } else
1215 pdev = NULL;
1216
1217 if (pdev && (irq != pdev->irq)) {
1218 printk("%s: IRQ %u mapped to IO-APIC IRQ %u.\n", name, irq,
1219 pdev->irq);
1220 irq = pdev->irq;
1221 }
1222
1223 /* Board detected, allocate its IRQ */
1224 if (request_irq(irq, do_interrupt_handler,
1225 SA_INTERRUPT | ((subversion == ESA) ? SA_SHIRQ : 0),
1226 driver_name, (void *)&sha[j])) {
1227 printk("%s: unable to allocate IRQ %u, detaching.\n", name,
1228 irq);
1229 goto freelock;
1230 }
1231
1232 if (subversion == ISA && request_dma(dma_channel, driver_name)) {
1233 printk("%s: unable to allocate DMA channel %u, detaching.\n",
1234 name, dma_channel);
1235 goto freeirq;
1236 }
1237 #if defined(FORCE_CONFIG)
1238 {
1239 struct eata_config *cf;
1240 dma_addr_t cf_dma_addr;
1241
1242 cf = pci_alloc_consistent(pdev, sizeof(struct eata_config),
1243 &cf_dma_addr);
1244
1245 if (!cf) {
1246 printk
1247 ("%s: config, pci_alloc_consistent failed, detaching.\n",
1248 name);
1249 goto freedma;
1250 }
1251
1252 /* Set board configuration */
1253 memset((char *)cf, 0, sizeof(struct eata_config));
1254 cf->len = (ushort) H2DEV16((ushort) 510);
1255 cf->ocena = 1;
1256
1257 if (do_dma(port_base, cf_dma_addr, SET_CONFIG_DMA)) {
1258 printk
1259 ("%s: busy timeout sending configuration, detaching.\n",
1260 name);
1261 pci_free_consistent(pdev, sizeof(struct eata_config),
1262 cf, cf_dma_addr);
1263 goto freedma;
1264 }
1265
1266 }
1267 #endif
1268
1269 spin_unlock_irq(&driver_lock);
1270 sh[j] = shost = scsi_register(tpnt, sizeof(struct hostdata));
1271 spin_lock_irq(&driver_lock);
1272
1273 if (shost == NULL) {
1274 printk("%s: unable to register host, detaching.\n", name);
1275 goto freedma;
1276 }
1277
1278 shost->io_port = port_base;
1279 shost->unique_id = port_base;
1280 shost->n_io_port = REGION_SIZE;
1281 shost->dma_channel = dma_channel;
1282 shost->irq = irq;
1283 shost->sg_tablesize = (ushort) info.scatt_size;
1284 shost->this_id = (ushort) info.host_addr[3];
1285 shost->can_queue = (ushort) info.queue_size;
1286 shost->cmd_per_lun = MAX_CMD_PER_LUN;
1287
1288 ha = (struct hostdata *)shost->hostdata;
1289
1290 memset(ha, 0, sizeof(struct hostdata));
1291 ha->subversion = subversion;
1292 ha->protocol_rev = protocol_rev;
1293 ha->is_pci = is_pci;
1294 ha->pdev = pdev;
1295 ha->board_number = j;
1296
1297 if (ha->subversion == ESA)
1298 shost->unchecked_isa_dma = 0;
1299 else {
1300 unsigned long flags;
1301 shost->unchecked_isa_dma = 1;
1302
1303 flags = claim_dma_lock();
1304 disable_dma(dma_channel);
1305 clear_dma_ff(dma_channel);
1306 set_dma_mode(dma_channel, DMA_MODE_CASCADE);
1307 enable_dma(dma_channel);
1308 release_dma_lock(flags);
1309
1310 }
1311
1312 strcpy(ha->board_name, name);
1313
1314 /* DPT PM2012 does not allow to detect sg_tablesize correctly */
1315 if (shost->sg_tablesize > MAX_SGLIST || shost->sg_tablesize < 2) {
1316 printk("%s: detect, wrong n. of SG lists %d, fixed.\n",
1317 ha->board_name, shost->sg_tablesize);
1318 shost->sg_tablesize = MAX_SGLIST;
1319 }
1320
1321 /* DPT PM2012 does not allow to detect can_queue correctly */
1322 if (shost->can_queue > MAX_MAILBOXES || shost->can_queue < 2) {
1323 printk("%s: detect, wrong n. of mbox %d, fixed.\n",
1324 ha->board_name, shost->can_queue);
1325 shost->can_queue = MAX_MAILBOXES;
1326 }
1327
1328 if (protocol_rev != 'A') {
1329 if (info.max_chan > 0 && info.max_chan < MAX_CHANNEL)
1330 shost->max_channel = info.max_chan;
1331
1332 if (info.max_id > 7 && info.max_id < MAX_TARGET)
1333 shost->max_id = info.max_id + 1;
1334
1335 if (info.large_sg && shost->sg_tablesize == MAX_SGLIST)
1336 shost->sg_tablesize = MAX_LARGE_SGLIST;
1337 }
1338
1339 if (protocol_rev == 'C') {
1340 if (info.max_lun > 7 && info.max_lun < MAX_LUN)
1341 shost->max_lun = info.max_lun + 1;
1342 }
1343
1344 if (dma_channel == NO_DMA)
1345 sprintf(dma_name, "%s", "BMST");
1346 else
1347 sprintf(dma_name, "DMA %u", dma_channel);
1348
1349 spin_unlock_irq(&driver_lock);
1350
1351 for (i = 0; i < shost->can_queue; i++)
1352 ha->cp[i].cp_dma_addr = pci_map_single(ha->pdev,
1353 &ha->cp[i],
1354 sizeof(struct mscp),
1355 PCI_DMA_BIDIRECTIONAL);
1356
1357 for (i = 0; i < shost->can_queue; i++) {
1358 size_t sz = shost->sg_tablesize *sizeof(struct sg_list);
1359 gfp_t gfp_mask = (shost->unchecked_isa_dma ? GFP_DMA : 0) | GFP_ATOMIC;
1360 ha->cp[i].sglist = kmalloc(sz, gfp_mask);
1361 if (!ha->cp[i].sglist) {
1362 printk
1363 ("%s: kmalloc SGlist failed, mbox %d, detaching.\n",
1364 ha->board_name, i);
1365 goto release;
1366 }
1367 }
1368
1369 if (!(ha->sp_cpu_addr = pci_alloc_consistent(ha->pdev,
1370 sizeof(struct mssp),
1371 &ha->sp_dma_addr))) {
1372 printk("%s: pci_alloc_consistent failed, detaching.\n", ha->board_name);
1373 goto release;
1374 }
1375
1376 if (max_queue_depth > MAX_TAGGED_CMD_PER_LUN)
1377 max_queue_depth = MAX_TAGGED_CMD_PER_LUN;
1378
1379 if (max_queue_depth < MAX_CMD_PER_LUN)
1380 max_queue_depth = MAX_CMD_PER_LUN;
1381
1382 if (tag_mode != TAG_DISABLED && tag_mode != TAG_SIMPLE)
1383 tag_mode = TAG_ORDERED;
1384
1385 if (j == 0) {
1386 printk
1387 ("EATA/DMA 2.0x: Copyright (C) 1994-2003 Dario Ballabio.\n");
1388 printk
1389 ("%s config options -> tm:%d, lc:%c, mq:%d, rs:%c, et:%c, "
1390 "ip:%c, ep:%c, pp:%c.\n", driver_name, tag_mode,
1391 YESNO(linked_comm), max_queue_depth, YESNO(rev_scan),
1392 YESNO(ext_tran), YESNO(isa_probe), YESNO(eisa_probe),
1393 YESNO(pci_probe));
1394 }
1395
1396 printk("%s: 2.0%c, %s 0x%03lx, IRQ %u, %s, SG %d, MB %d.\n",
1397 ha->board_name, ha->protocol_rev, bus_type,
1398 (unsigned long)shost->io_port, shost->irq, dma_name,
1399 shost->sg_tablesize, shost->can_queue);
1400
1401 if (shost->max_id > 8 || shost->max_lun > 8)
1402 printk
1403 ("%s: wide SCSI support enabled, max_id %u, max_lun %u.\n",
1404 ha->board_name, shost->max_id, shost->max_lun);
1405
1406 for (i = 0; i <= shost->max_channel; i++)
1407 printk("%s: SCSI channel %u enabled, host target ID %d.\n",
1408 ha->board_name, i, info.host_addr[3 - i]);
1409
1410 #if defined(DEBUG_DETECT)
1411 printk("%s: Vers. 0x%x, ocs %u, tar %u, trnxfr %u, more %u, SYNC 0x%x, "
1412 "sec. %u, infol %d, cpl %d spl %d.\n", name, info.version,
1413 info.ocsena, info.tarsup, info.trnxfr, info.morsup, info.sync,
1414 info.second, info.data_len, info.cp_len, info.sp_len);
1415
1416 if (protocol_rev == 'B' || protocol_rev == 'C')
1417 printk("%s: isaena %u, forcaddr %u, max_id %u, max_chan %u, "
1418 "large_sg %u, res1 %u.\n", name, info.isaena,
1419 info.forcaddr, info.max_id, info.max_chan, info.large_sg,
1420 info.res1);
1421
1422 if (protocol_rev == 'C')
1423 printk("%s: max_lun %u, m1 %u, idquest %u, pci %u, eisa %u, "
1424 "raidnum %u.\n", name, info.max_lun, info.m1,
1425 info.idquest, info.pci, info.eisa, info.raidnum);
1426 #endif
1427
1428 if (ha->pdev) {
1429 pci_set_master(ha->pdev);
1430 if (pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK))
1431 printk("%s: warning, pci_set_dma_mask failed.\n",
1432 ha->board_name);
1433 }
1434
1435 return 1;
1436
1437 freedma:
1438 if (subversion == ISA)
1439 free_dma(dma_channel);
1440 freeirq:
1441 free_irq(irq, &sha[j]);
1442 freelock:
1443 spin_unlock_irq(&driver_lock);
1444 release_region(port_base, REGION_SIZE);
1445 fail:
1446 return 0;
1447
1448 release:
1449 eata2x_release(shost);
1450 return 0;
1451 }
1452
1453 static void internal_setup(char *str, int *ints)
1454 {
1455 int i, argc = ints[0];
1456 char *cur = str, *pc;
1457
1458 if (argc > 0) {
1459 if (argc > MAX_INT_PARAM)
1460 argc = MAX_INT_PARAM;
1461
1462 for (i = 0; i < argc; i++)
1463 io_port[i] = ints[i + 1];
1464
1465 io_port[i] = 0;
1466 setup_done = 1;
1467 }
1468
1469 while (cur && (pc = strchr(cur, ':'))) {
1470 int val = 0, c = *++pc;
1471
1472 if (c == 'n' || c == 'N')
1473 val = 0;
1474 else if (c == 'y' || c == 'Y')
1475 val = 1;
1476 else
1477 val = (int)simple_strtoul(pc, NULL, 0);
1478
1479 if (!strncmp(cur, "lc:", 3))
1480 linked_comm = val;
1481 else if (!strncmp(cur, "tm:", 3))
1482 tag_mode = val;
1483 else if (!strncmp(cur, "tc:", 3))
1484 tag_mode = val;
1485 else if (!strncmp(cur, "mq:", 3))
1486 max_queue_depth = val;
1487 else if (!strncmp(cur, "ls:", 3))
1488 link_statistics = val;
1489 else if (!strncmp(cur, "et:", 3))
1490 ext_tran = val;
1491 else if (!strncmp(cur, "rs:", 3))
1492 rev_scan = val;
1493 else if (!strncmp(cur, "ip:", 3))
1494 isa_probe = val;
1495 else if (!strncmp(cur, "ep:", 3))
1496 eisa_probe = val;
1497 else if (!strncmp(cur, "pp:", 3))
1498 pci_probe = val;
1499
1500 if ((cur = strchr(cur, ',')))
1501 ++cur;
1502 }
1503
1504 return;
1505 }
1506
1507 static int option_setup(char *str)
1508 {
1509 int ints[MAX_INT_PARAM];
1510 char *cur = str;
1511 int i = 1;
1512
1513 while (cur && isdigit(*cur) && i <= MAX_INT_PARAM) {
1514 ints[i++] = simple_strtoul(cur, NULL, 0);
1515
1516 if ((cur = strchr(cur, ',')) != NULL)
1517 cur++;
1518 }
1519
1520 ints[0] = i - 1;
1521 internal_setup(cur, ints);
1522 return 1;
1523 }
1524
1525 static void add_pci_ports(void)
1526 {
1527 #if defined(CONFIG_PCI)
1528 unsigned int addr, k;
1529 struct pci_dev *dev = NULL;
1530
1531 for (k = 0; k < MAX_PCI; k++) {
1532
1533 if (!(dev = pci_get_class(PCI_CLASS_STORAGE_SCSI << 8, dev)))
1534 break;
1535
1536 if (pci_enable_device(dev)) {
1537 #if defined(DEBUG_PCI_DETECT)
1538 printk
1539 ("%s: detect, bus %d, devfn 0x%x, pci_enable_device failed.\n",
1540 driver_name, dev->bus->number, dev->devfn);
1541 #endif
1542
1543 continue;
1544 }
1545
1546 addr = pci_resource_start(dev, 0);
1547
1548 #if defined(DEBUG_PCI_DETECT)
1549 printk("%s: detect, seq. %d, bus %d, devfn 0x%x, addr 0x%x.\n",
1550 driver_name, k, dev->bus->number, dev->devfn, addr);
1551 #endif
1552
1553 /* Order addresses according to rev_scan value */
1554 io_port[MAX_INT_PARAM + (rev_scan ? (MAX_PCI - k) : (1 + k))] =
1555 addr + PCI_BASE_ADDRESS_0;
1556 }
1557
1558 pci_dev_put(dev);
1559 #endif /* end CONFIG_PCI */
1560 }
1561
1562 static int eata2x_detect(struct scsi_host_template *tpnt)
1563 {
1564 unsigned int j = 0, k;
1565
1566 tpnt->proc_name = "eata2x";
1567
1568 if (strlen(boot_options))
1569 option_setup(boot_options);
1570
1571 #if defined(MODULE)
1572 /* io_port could have been modified when loading as a module */
1573 if (io_port[0] != SKIP) {
1574 setup_done = 1;
1575 io_port[MAX_INT_PARAM] = 0;
1576 }
1577 #endif
1578
1579 for (k = MAX_INT_PARAM; io_port[k]; k++)
1580 if (io_port[k] == SKIP)
1581 continue;
1582 else if (io_port[k] <= MAX_ISA_ADDR) {
1583 if (!isa_probe)
1584 io_port[k] = SKIP;
1585 } else if (io_port[k] >= MIN_EISA_ADDR
1586 && io_port[k] <= MAX_EISA_ADDR) {
1587 if (!eisa_probe)
1588 io_port[k] = SKIP;
1589 }
1590
1591 if (pci_probe) {
1592 if (!setup_done)
1593 add_pci_ports();
1594 else
1595 enable_pci_ports();
1596 }
1597
1598 for (k = 0; io_port[k]; k++) {
1599
1600 if (io_port[k] == SKIP)
1601 continue;
1602
1603 if (j < MAX_BOARDS && port_detect(io_port[k], j, tpnt))
1604 j++;
1605 }
1606
1607 num_boards = j;
1608 return j;
1609 }
1610
1611 static void map_dma(unsigned int i, struct hostdata *ha)
1612 {
1613 unsigned int k, count, pci_dir;
1614 struct scatterlist *sgpnt;
1615 struct mscp *cpp;
1616 struct scsi_cmnd *SCpnt;
1617
1618 cpp = &ha->cp[i];
1619 SCpnt = cpp->SCpnt;
1620 pci_dir = SCpnt->sc_data_direction;
1621
1622 if (SCpnt->sense_buffer)
1623 cpp->sense_addr =
1624 H2DEV(pci_map_single(ha->pdev, SCpnt->sense_buffer,
1625 sizeof SCpnt->sense_buffer, PCI_DMA_FROMDEVICE));
1626
1627 cpp->sense_len = sizeof SCpnt->sense_buffer;
1628
1629 if (!SCpnt->use_sg) {
1630
1631 /* If we get here with PCI_DMA_NONE, pci_map_single triggers a BUG() */
1632 if (!SCpnt->request_bufflen)
1633 pci_dir = PCI_DMA_BIDIRECTIONAL;
1634
1635 if (SCpnt->request_buffer)
1636 cpp->data_address = H2DEV(pci_map_single(ha->pdev,
1637 SCpnt->
1638 request_buffer,
1639 SCpnt->
1640 request_bufflen,
1641 pci_dir));
1642
1643 cpp->data_len = H2DEV(SCpnt->request_bufflen);
1644 return;
1645 }
1646
1647 sgpnt = (struct scatterlist *)SCpnt->request_buffer;
1648 count = pci_map_sg(ha->pdev, sgpnt, SCpnt->use_sg, pci_dir);
1649
1650 for (k = 0; k < count; k++) {
1651 cpp->sglist[k].address = H2DEV(sg_dma_address(&sgpnt[k]));
1652 cpp->sglist[k].num_bytes = H2DEV(sg_dma_len(&sgpnt[k]));
1653 }
1654
1655 cpp->sg = 1;
1656 cpp->data_address = H2DEV(pci_map_single(ha->pdev, cpp->sglist,
1657 SCpnt->use_sg *
1658 sizeof(struct sg_list),
1659 pci_dir));
1660 cpp->data_len = H2DEV((SCpnt->use_sg * sizeof(struct sg_list)));
1661 }
1662
1663 static void unmap_dma(unsigned int i, struct hostdata *ha)
1664 {
1665 unsigned int pci_dir;
1666 struct mscp *cpp;
1667 struct scsi_cmnd *SCpnt;
1668
1669 cpp = &ha->cp[i];
1670 SCpnt = cpp->SCpnt;
1671 pci_dir = SCpnt->sc_data_direction;
1672
1673 if (DEV2H(cpp->sense_addr))
1674 pci_unmap_single(ha->pdev, DEV2H(cpp->sense_addr),
1675 DEV2H(cpp->sense_len), PCI_DMA_FROMDEVICE);
1676
1677 if (SCpnt->use_sg)
1678 pci_unmap_sg(ha->pdev, SCpnt->request_buffer, SCpnt->use_sg,
1679 pci_dir);
1680
1681 if (!DEV2H(cpp->data_len))
1682 pci_dir = PCI_DMA_BIDIRECTIONAL;
1683
1684 if (DEV2H(cpp->data_address))
1685 pci_unmap_single(ha->pdev, DEV2H(cpp->data_address),
1686 DEV2H(cpp->data_len), pci_dir);
1687 }
1688
1689 static void sync_dma(unsigned int i, struct hostdata *ha)
1690 {
1691 unsigned int pci_dir;
1692 struct mscp *cpp;
1693 struct scsi_cmnd *SCpnt;
1694
1695 cpp = &ha->cp[i];
1696 SCpnt = cpp->SCpnt;
1697 pci_dir = SCpnt->sc_data_direction;
1698
1699 if (DEV2H(cpp->sense_addr))
1700 pci_dma_sync_single_for_cpu(ha->pdev, DEV2H(cpp->sense_addr),
1701 DEV2H(cpp->sense_len),
1702 PCI_DMA_FROMDEVICE);
1703
1704 if (SCpnt->use_sg)
1705 pci_dma_sync_sg_for_cpu(ha->pdev, SCpnt->request_buffer,
1706 SCpnt->use_sg, pci_dir);
1707
1708 if (!DEV2H(cpp->data_len))
1709 pci_dir = PCI_DMA_BIDIRECTIONAL;
1710
1711 if (DEV2H(cpp->data_address))
1712 pci_dma_sync_single_for_cpu(ha->pdev,
1713 DEV2H(cpp->data_address),
1714 DEV2H(cpp->data_len), pci_dir);
1715 }
1716
1717 static void scsi_to_dev_dir(unsigned int i, struct hostdata *ha)
1718 {
1719 unsigned int k;
1720
1721 static const unsigned char data_out_cmds[] = {
1722 0x0a, 0x2a, 0x15, 0x55, 0x04, 0x07, 0x18, 0x1d, 0x24, 0x2e,
1723 0x30, 0x31, 0x32, 0x38, 0x39, 0x3a, 0x3b, 0x3d, 0x3f, 0x40,
1724 0x41, 0x4c, 0xaa, 0xae, 0xb0, 0xb1, 0xb2, 0xb6, 0xea, 0x1b, 0x5d
1725 };
1726
1727 static const unsigned char data_none_cmds[] = {
1728 0x01, 0x0b, 0x10, 0x11, 0x13, 0x16, 0x17, 0x19, 0x2b, 0x1e,
1729 0x2c, 0xac, 0x2f, 0xaf, 0x33, 0xb3, 0x35, 0x36, 0x45, 0x47,
1730 0x48, 0x49, 0xa9, 0x4b, 0xa5, 0xa6, 0xb5, 0x00
1731 };
1732
1733 struct mscp *cpp;
1734 struct scsi_cmnd *SCpnt;
1735
1736 cpp = &ha->cp[i];
1737 SCpnt = cpp->SCpnt;
1738
1739 if (SCpnt->sc_data_direction == DMA_FROM_DEVICE) {
1740 cpp->din = 1;
1741 cpp->dout = 0;
1742 return;
1743 } else if (SCpnt->sc_data_direction == DMA_TO_DEVICE) {
1744 cpp->din = 0;
1745 cpp->dout = 1;
1746 return;
1747 } else if (SCpnt->sc_data_direction == DMA_NONE) {
1748 cpp->din = 0;
1749 cpp->dout = 0;
1750 return;
1751 }
1752
1753 if (SCpnt->sc_data_direction != DMA_BIDIRECTIONAL)
1754 panic("%s: qcomm, invalid SCpnt->sc_data_direction.\n",
1755 ha->board_name);
1756
1757 for (k = 0; k < ARRAY_SIZE(data_out_cmds); k++)
1758 if (SCpnt->cmnd[0] == data_out_cmds[k]) {
1759 cpp->dout = 1;
1760 break;
1761 }
1762
1763 if ((cpp->din = !cpp->dout))
1764 for (k = 0; k < ARRAY_SIZE(data_none_cmds); k++)
1765 if (SCpnt->cmnd[0] == data_none_cmds[k]) {
1766 cpp->din = 0;
1767 break;
1768 }
1769
1770 }
1771
1772 static int eata2x_queuecommand(struct scsi_cmnd *SCpnt,
1773 void (*done) (struct scsi_cmnd *))
1774 {
1775 struct Scsi_Host *shost = SCpnt->device->host;
1776 struct hostdata *ha = (struct hostdata *)shost->hostdata;
1777 unsigned int i, k;
1778 struct mscp *cpp;
1779
1780 if (SCpnt->host_scribble)
1781 panic("%s: qcomm, pid %ld, SCpnt %p already active.\n",
1782 ha->board_name, SCpnt->pid, SCpnt);
1783
1784 /* i is the mailbox number, look for the first free mailbox
1785 starting from last_cp_used */
1786 i = ha->last_cp_used + 1;
1787
1788 for (k = 0; k < shost->can_queue; k++, i++) {
1789 if (i >= shost->can_queue)
1790 i = 0;
1791 if (ha->cp_stat[i] == FREE) {
1792 ha->last_cp_used = i;
1793 break;
1794 }
1795 }
1796
1797 if (k == shost->can_queue) {
1798 printk("%s: qcomm, no free mailbox.\n", ha->board_name);
1799 return 1;
1800 }
1801
1802 /* Set pointer to control packet structure */
1803 cpp = &ha->cp[i];
1804
1805 memset(cpp, 0, sizeof(struct mscp) - CP_TAIL_SIZE);
1806
1807 /* Set pointer to status packet structure, Big Endian format */
1808 cpp->sp_dma_addr = H2DEV(ha->sp_dma_addr);
1809
1810 SCpnt->scsi_done = done;
1811 cpp->cpp_index = i;
1812 SCpnt->host_scribble = (unsigned char *)&cpp->cpp_index;
1813
1814 if (do_trace)
1815 scmd_printk(KERN_INFO, SCpnt,
1816 "qcomm, mbox %d, pid %ld.\n", i, SCpnt->pid);
1817
1818 cpp->reqsen = 1;
1819 cpp->dispri = 1;
1820 #if 0
1821 if (SCpnt->device->type == TYPE_TAPE)
1822 cpp->hbaci = 1;
1823 #endif
1824 cpp->one = 1;
1825 cpp->channel = SCpnt->device->channel;
1826 cpp->target = SCpnt->device->id;
1827 cpp->lun = SCpnt->device->lun;
1828 cpp->SCpnt = SCpnt;
1829 memcpy(cpp->cdb, SCpnt->cmnd, SCpnt->cmd_len);
1830
1831 /* Use data transfer direction SCpnt->sc_data_direction */
1832 scsi_to_dev_dir(i, ha);
1833
1834 /* Map DMA buffers and SG list */
1835 map_dma(i, ha);
1836
1837 if (linked_comm && SCpnt->device->queue_depth > 2
1838 && TLDEV(SCpnt->device->type)) {
1839 ha->cp_stat[i] = READY;
1840 flush_dev(SCpnt->device, SCpnt->request->sector, ha, 0);
1841 return 0;
1842 }
1843
1844 /* Send control packet to the board */
1845 if (do_dma(shost->io_port, cpp->cp_dma_addr, SEND_CP_DMA)) {
1846 unmap_dma(i, ha);
1847 SCpnt->host_scribble = NULL;
1848 scmd_printk(KERN_INFO, SCpnt,
1849 "qcomm, pid %ld, adapter busy.\n", SCpnt->pid);
1850 return 1;
1851 }
1852
1853 ha->cp_stat[i] = IN_USE;
1854 return 0;
1855 }
1856
1857 static int eata2x_eh_abort(struct scsi_cmnd *SCarg)
1858 {
1859 struct Scsi_Host *shost = SCarg->device->host;
1860 struct hostdata *ha = (struct hostdata *)shost->hostdata;
1861 unsigned int i;
1862
1863 if (SCarg->host_scribble == NULL) {
1864 scmd_printk(KERN_INFO, SCarg,
1865 "abort, pid %ld inactive.\n", SCarg->pid);
1866 return SUCCESS;
1867 }
1868
1869 i = *(unsigned int *)SCarg->host_scribble;
1870 scmd_printk(KERN_WARNING, SCarg,
1871 "abort, mbox %d, pid %ld.\n", i, SCarg->pid);
1872
1873 if (i >= shost->can_queue)
1874 panic("%s: abort, invalid SCarg->host_scribble.\n", ha->board_name);
1875
1876 if (wait_on_busy(shost->io_port, MAXLOOP)) {
1877 printk("%s: abort, timeout error.\n", ha->board_name);
1878 return FAILED;
1879 }
1880
1881 if (ha->cp_stat[i] == FREE) {
1882 printk("%s: abort, mbox %d is free.\n", ha->board_name, i);
1883 return SUCCESS;
1884 }
1885
1886 if (ha->cp_stat[i] == IN_USE) {
1887 printk("%s: abort, mbox %d is in use.\n", ha->board_name, i);
1888
1889 if (SCarg != ha->cp[i].SCpnt)
1890 panic("%s: abort, mbox %d, SCarg %p, cp SCpnt %p.\n",
1891 ha->board_name, i, SCarg, ha->cp[i].SCpnt);
1892
1893 if (inb(shost->io_port + REG_AUX_STATUS) & IRQ_ASSERTED)
1894 printk("%s: abort, mbox %d, interrupt pending.\n",
1895 ha->board_name, i);
1896
1897 return FAILED;
1898 }
1899
1900 if (ha->cp_stat[i] == IN_RESET) {
1901 printk("%s: abort, mbox %d is in reset.\n", ha->board_name, i);
1902 return FAILED;
1903 }
1904
1905 if (ha->cp_stat[i] == LOCKED) {
1906 printk("%s: abort, mbox %d is locked.\n", ha->board_name, i);
1907 return SUCCESS;
1908 }
1909
1910 if (ha->cp_stat[i] == READY || ha->cp_stat[i] == ABORTING) {
1911 unmap_dma(i, ha);
1912 SCarg->result = DID_ABORT << 16;
1913 SCarg->host_scribble = NULL;
1914 ha->cp_stat[i] = FREE;
1915 printk("%s, abort, mbox %d ready, DID_ABORT, pid %ld done.\n",
1916 ha->board_name, i, SCarg->pid);
1917 SCarg->scsi_done(SCarg);
1918 return SUCCESS;
1919 }
1920
1921 panic("%s: abort, mbox %d, invalid cp_stat.\n", ha->board_name, i);
1922 }
1923
1924 static int eata2x_eh_host_reset(struct scsi_cmnd *SCarg)
1925 {
1926 unsigned int i, time, k, c, limit = 0;
1927 int arg_done = 0;
1928 struct scsi_cmnd *SCpnt;
1929 struct Scsi_Host *shost = SCarg->device->host;
1930 struct hostdata *ha = (struct hostdata *)shost->hostdata;
1931
1932 scmd_printk(KERN_INFO, SCarg,
1933 "reset, enter, pid %ld.\n", SCarg->pid);
1934
1935 spin_lock_irq(shost->host_lock);
1936
1937 if (SCarg->host_scribble == NULL)
1938 printk("%s: reset, pid %ld inactive.\n", ha->board_name, SCarg->pid);
1939
1940 if (ha->in_reset) {
1941 printk("%s: reset, exit, already in reset.\n", ha->board_name);
1942 spin_unlock_irq(shost->host_lock);
1943 return FAILED;
1944 }
1945
1946 if (wait_on_busy(shost->io_port, MAXLOOP)) {
1947 printk("%s: reset, exit, timeout error.\n", ha->board_name);
1948 spin_unlock_irq(shost->host_lock);
1949 return FAILED;
1950 }
1951
1952 ha->retries = 0;
1953
1954 for (c = 0; c <= shost->max_channel; c++)
1955 for (k = 0; k < shost->max_id; k++) {
1956 ha->target_redo[k][c] = 1;
1957 ha->target_to[k][c] = 0;
1958 }
1959
1960 for (i = 0; i < shost->can_queue; i++) {
1961
1962 if (ha->cp_stat[i] == FREE)
1963 continue;
1964
1965 if (ha->cp_stat[i] == LOCKED) {
1966 ha->cp_stat[i] = FREE;
1967 printk("%s: reset, locked mbox %d forced free.\n",
1968 ha->board_name, i);
1969 continue;
1970 }
1971
1972 if (!(SCpnt = ha->cp[i].SCpnt))
1973 panic("%s: reset, mbox %d, SCpnt == NULL.\n", ha->board_name, i);
1974
1975 if (ha->cp_stat[i] == READY || ha->cp_stat[i] == ABORTING) {
1976 ha->cp_stat[i] = ABORTING;
1977 printk("%s: reset, mbox %d aborting, pid %ld.\n",
1978 ha->board_name, i, SCpnt->pid);
1979 }
1980
1981 else {
1982 ha->cp_stat[i] = IN_RESET;
1983 printk("%s: reset, mbox %d in reset, pid %ld.\n",
1984 ha->board_name, i, SCpnt->pid);
1985 }
1986
1987 if (SCpnt->host_scribble == NULL)
1988 panic("%s: reset, mbox %d, garbled SCpnt.\n", ha->board_name, i);
1989
1990 if (*(unsigned int *)SCpnt->host_scribble != i)
1991 panic("%s: reset, mbox %d, index mismatch.\n", ha->board_name, i);
1992
1993 if (SCpnt->scsi_done == NULL)
1994 panic("%s: reset, mbox %d, SCpnt->scsi_done == NULL.\n",
1995 ha->board_name, i);
1996
1997 if (SCpnt == SCarg)
1998 arg_done = 1;
1999 }
2000
2001 if (do_dma(shost->io_port, 0, RESET_PIO)) {
2002 printk("%s: reset, cannot reset, timeout error.\n", ha->board_name);
2003 spin_unlock_irq(shost->host_lock);
2004 return FAILED;
2005 }
2006
2007 printk("%s: reset, board reset done, enabling interrupts.\n", ha->board_name);
2008
2009 #if defined(DEBUG_RESET)
2010 do_trace = 1;
2011 #endif
2012
2013 ha->in_reset = 1;
2014
2015 spin_unlock_irq(shost->host_lock);
2016
2017 /* FIXME: use a sleep instead */
2018 time = jiffies;
2019 while ((jiffies - time) < (10 * HZ) && limit++ < 200000)
2020 udelay(100L);
2021
2022 spin_lock_irq(shost->host_lock);
2023
2024 printk("%s: reset, interrupts disabled, loops %d.\n", ha->board_name, limit);
2025
2026 for (i = 0; i < shost->can_queue; i++) {
2027
2028 if (ha->cp_stat[i] == IN_RESET) {
2029 SCpnt = ha->cp[i].SCpnt;
2030 unmap_dma(i, ha);
2031 SCpnt->result = DID_RESET << 16;
2032 SCpnt->host_scribble = NULL;
2033
2034 /* This mailbox is still waiting for its interrupt */
2035 ha->cp_stat[i] = LOCKED;
2036
2037 printk
2038 ("%s, reset, mbox %d locked, DID_RESET, pid %ld done.\n",
2039 ha->board_name, i, SCpnt->pid);
2040 }
2041
2042 else if (ha->cp_stat[i] == ABORTING) {
2043 SCpnt = ha->cp[i].SCpnt;
2044 unmap_dma(i, ha);
2045 SCpnt->result = DID_RESET << 16;
2046 SCpnt->host_scribble = NULL;
2047
2048 /* This mailbox was never queued to the adapter */
2049 ha->cp_stat[i] = FREE;
2050
2051 printk
2052 ("%s, reset, mbox %d aborting, DID_RESET, pid %ld done.\n",
2053 ha->board_name, i, SCpnt->pid);
2054 }
2055
2056 else
2057 /* Any other mailbox has already been set free by interrupt */
2058 continue;
2059
2060 SCpnt->scsi_done(SCpnt);
2061 }
2062
2063 ha->in_reset = 0;
2064 do_trace = 0;
2065
2066 if (arg_done)
2067 printk("%s: reset, exit, pid %ld done.\n", ha->board_name, SCarg->pid);
2068 else
2069 printk("%s: reset, exit.\n", ha->board_name);
2070
2071 spin_unlock_irq(shost->host_lock);
2072 return SUCCESS;
2073 }
2074
2075 int eata2x_bios_param(struct scsi_device *sdev, struct block_device *bdev,
2076 sector_t capacity, int *dkinfo)
2077 {
2078 unsigned int size = capacity;
2079
2080 if (ext_tran || (scsicam_bios_param(bdev, capacity, dkinfo) < 0)) {
2081 dkinfo[0] = 255;
2082 dkinfo[1] = 63;
2083 dkinfo[2] = size / (dkinfo[0] * dkinfo[1]);
2084 }
2085 #if defined (DEBUG_GEOMETRY)
2086 printk("%s: bios_param, head=%d, sec=%d, cyl=%d.\n", driver_name,
2087 dkinfo[0], dkinfo[1], dkinfo[2]);
2088 #endif
2089
2090 return 0;
2091 }
2092
2093 static void sort(unsigned long sk[], unsigned int da[], unsigned int n,
2094 unsigned int rev)
2095 {
2096 unsigned int i, j, k, y;
2097 unsigned long x;
2098
2099 for (i = 0; i < n - 1; i++) {
2100 k = i;
2101
2102 for (j = k + 1; j < n; j++)
2103 if (rev) {
2104 if (sk[j] > sk[k])
2105 k = j;
2106 } else {
2107 if (sk[j] < sk[k])
2108 k = j;
2109 }
2110
2111 if (k != i) {
2112 x = sk[k];
2113 sk[k] = sk[i];
2114 sk[i] = x;
2115 y = da[k];
2116 da[k] = da[i];
2117 da[i] = y;
2118 }
2119 }
2120
2121 return;
2122 }
2123
2124 static int reorder(struct hostdata *ha, unsigned long cursec,
2125 unsigned int ihdlr, unsigned int il[], unsigned int n_ready)
2126 {
2127 struct scsi_cmnd *SCpnt;
2128 struct mscp *cpp;
2129 unsigned int k, n;
2130 unsigned int rev = 0, s = 1, r = 1;
2131 unsigned int input_only = 1, overlap = 0;
2132 unsigned long sl[n_ready], pl[n_ready], ll[n_ready];
2133 unsigned long maxsec = 0, minsec = ULONG_MAX, seek = 0, iseek = 0;
2134 unsigned long ioseek = 0;
2135
2136 static unsigned int flushcount = 0, batchcount = 0, sortcount = 0;
2137 static unsigned int readycount = 0, ovlcount = 0, inputcount = 0;
2138 static unsigned int readysorted = 0, revcount = 0;
2139 static unsigned long seeksorted = 0, seeknosort = 0;
2140
2141 if (link_statistics && !(++flushcount % link_statistics))
2142 printk("fc %d bc %d ic %d oc %d rc %d rs %d sc %d re %d"
2143 " av %ldK as %ldK.\n", flushcount, batchcount,
2144 inputcount, ovlcount, readycount, readysorted, sortcount,
2145 revcount, seeknosort / (readycount + 1),
2146 seeksorted / (readycount + 1));
2147
2148 if (n_ready <= 1)
2149 return 0;
2150
2151 for (n = 0; n < n_ready; n++) {
2152 k = il[n];
2153 cpp = &ha->cp[k];
2154 SCpnt = cpp->SCpnt;
2155
2156 if (!cpp->din)
2157 input_only = 0;
2158
2159 if (SCpnt->request->sector < minsec)
2160 minsec = SCpnt->request->sector;
2161 if (SCpnt->request->sector > maxsec)
2162 maxsec = SCpnt->request->sector;
2163
2164 sl[n] = SCpnt->request->sector;
2165 ioseek += SCpnt->request->nr_sectors;
2166
2167 if (!n)
2168 continue;
2169
2170 if (sl[n] < sl[n - 1])
2171 s = 0;
2172 if (sl[n] > sl[n - 1])
2173 r = 0;
2174
2175 if (link_statistics) {
2176 if (sl[n] > sl[n - 1])
2177 seek += sl[n] - sl[n - 1];
2178 else
2179 seek += sl[n - 1] - sl[n];
2180 }
2181
2182 }
2183
2184 if (link_statistics) {
2185 if (cursec > sl[0])
2186 seek += cursec - sl[0];
2187 else
2188 seek += sl[0] - cursec;
2189 }
2190
2191 if (cursec > ((maxsec + minsec) / 2))
2192 rev = 1;
2193
2194 if (ioseek > ((maxsec - minsec) / 2))
2195 rev = 0;
2196
2197 if (!((rev && r) || (!rev && s)))
2198 sort(sl, il, n_ready, rev);
2199
2200 if (!input_only)
2201 for (n = 0; n < n_ready; n++) {
2202 k = il[n];
2203 cpp = &ha->cp[k];
2204 SCpnt = cpp->SCpnt;
2205 ll[n] = SCpnt->request->nr_sectors;
2206 pl[n] = SCpnt->pid;
2207
2208 if (!n)
2209 continue;
2210
2211 if ((sl[n] == sl[n - 1])
2212 || (!rev && ((sl[n - 1] + ll[n - 1]) > sl[n]))
2213 || (rev && ((sl[n] + ll[n]) > sl[n - 1])))
2214 overlap = 1;
2215 }
2216
2217 if (overlap)
2218 sort(pl, il, n_ready, 0);
2219
2220 if (link_statistics) {
2221 if (cursec > sl[0])
2222 iseek = cursec - sl[0];
2223 else
2224 iseek = sl[0] - cursec;
2225 batchcount++;
2226 readycount += n_ready;
2227 seeknosort += seek / 1024;
2228 if (input_only)
2229 inputcount++;
2230 if (overlap) {
2231 ovlcount++;
2232 seeksorted += iseek / 1024;
2233 } else
2234 seeksorted += (iseek + maxsec - minsec) / 1024;
2235 if (rev && !r) {
2236 revcount++;
2237 readysorted += n_ready;
2238 }
2239 if (!rev && !s) {
2240 sortcount++;
2241 readysorted += n_ready;
2242 }
2243 }
2244 #if defined(DEBUG_LINKED_COMMANDS)
2245 if (link_statistics && (overlap || !(flushcount % link_statistics)))
2246 for (n = 0; n < n_ready; n++) {
2247 k = il[n];
2248 cpp = &ha->cp[k];
2249 SCpnt = cpp->SCpnt;
2250 scmd_printk(KERN_INFO, SCpnt,
2251 "%s pid %ld mb %d fc %d nr %d sec %ld ns %ld"
2252 " cur %ld s:%c r:%c rev:%c in:%c ov:%c xd %d.\n",
2253 (ihdlr ? "ihdlr" : "qcomm"),
2254 SCpnt->pid, k, flushcount,
2255 n_ready, SCpnt->request->sector,
2256 SCpnt->request->nr_sectors, cursec, YESNO(s),
2257 YESNO(r), YESNO(rev), YESNO(input_only),
2258 YESNO(overlap), cpp->din);
2259 }
2260 #endif
2261 return overlap;
2262 }
2263
2264 static void flush_dev(struct scsi_device *dev, unsigned long cursec,
2265 struct hostdata *ha, unsigned int ihdlr)
2266 {
2267 struct scsi_cmnd *SCpnt;
2268 struct mscp *cpp;
2269 unsigned int k, n, n_ready = 0, il[MAX_MAILBOXES];
2270
2271 for (k = 0; k < dev->host->can_queue; k++) {
2272
2273 if (ha->cp_stat[k] != READY && ha->cp_stat[k] != IN_USE)
2274 continue;
2275
2276 cpp = &ha->cp[k];
2277 SCpnt = cpp->SCpnt;
2278
2279 if (SCpnt->device != dev)
2280 continue;
2281
2282 if (ha->cp_stat[k] == IN_USE)
2283 return;
2284
2285 il[n_ready++] = k;
2286 }
2287
2288 if (reorder(ha, cursec, ihdlr, il, n_ready))
2289 n_ready = 1;
2290
2291 for (n = 0; n < n_ready; n++) {
2292 k = il[n];
2293 cpp = &ha->cp[k];
2294 SCpnt = cpp->SCpnt;
2295
2296 if (do_dma(dev->host->io_port, cpp->cp_dma_addr, SEND_CP_DMA)) {
2297 scmd_printk(KERN_INFO, SCpnt,
2298 "%s, pid %ld, mbox %d, adapter"
2299 " busy, will abort.\n",
2300 (ihdlr ? "ihdlr" : "qcomm"),
2301 SCpnt->pid, k);
2302 ha->cp_stat[k] = ABORTING;
2303 continue;
2304 }
2305
2306 ha->cp_stat[k] = IN_USE;
2307 }
2308 }
2309
2310 static irqreturn_t ihdlr(int irq, struct Scsi_Host *shost)
2311 {
2312 struct scsi_cmnd *SCpnt;
2313 unsigned int i, k, c, status, tstatus, reg;
2314 struct mssp *spp;
2315 struct mscp *cpp;
2316 struct hostdata *ha = (struct hostdata *)shost->hostdata;
2317
2318 if (shost->irq != irq)
2319 panic("%s: ihdlr, irq %d, shost->irq %d.\n", ha->board_name, irq,
2320 shost->irq);
2321
2322 /* Check if this board need to be serviced */
2323 if (!(inb(shost->io_port + REG_AUX_STATUS) & IRQ_ASSERTED))
2324 goto none;
2325
2326 ha->iocount++;
2327
2328 if (do_trace)
2329 printk("%s: ihdlr, enter, irq %d, count %d.\n", ha->board_name, irq,
2330 ha->iocount);
2331
2332 /* Check if this board is still busy */
2333 if (wait_on_busy(shost->io_port, 20 * MAXLOOP)) {
2334 reg = inb(shost->io_port + REG_STATUS);
2335 printk
2336 ("%s: ihdlr, busy timeout error, irq %d, reg 0x%x, count %d.\n",
2337 ha->board_name, irq, reg, ha->iocount);
2338 goto none;
2339 }
2340
2341 spp = &ha->sp;
2342
2343 /* Make a local copy just before clearing the interrupt indication */
2344 memcpy(spp, ha->sp_cpu_addr, sizeof(struct mssp));
2345
2346 /* Clear the completion flag and cp pointer on the dynamic copy of sp */
2347 memset(ha->sp_cpu_addr, 0, sizeof(struct mssp));
2348
2349 /* Read the status register to clear the interrupt indication */
2350 reg = inb(shost->io_port + REG_STATUS);
2351
2352 #if defined (DEBUG_INTERRUPT)
2353 {
2354 unsigned char *bytesp;
2355 int cnt;
2356 bytesp = (unsigned char *)spp;
2357 if (ha->iocount < 200) {
2358 printk("sp[] =");
2359 for (cnt = 0; cnt < 15; cnt++)
2360 printk(" 0x%x", bytesp[cnt]);
2361 printk("\n");
2362 }
2363 }
2364 #endif
2365
2366 /* Reject any sp with supspect data */
2367 if (spp->eoc == 0 && ha->iocount > 1)
2368 printk
2369 ("%s: ihdlr, spp->eoc == 0, irq %d, reg 0x%x, count %d.\n",
2370 ha->board_name, irq, reg, ha->iocount);
2371 if (spp->cpp_index < 0 || spp->cpp_index >= shost->can_queue)
2372 printk
2373 ("%s: ihdlr, bad spp->cpp_index %d, irq %d, reg 0x%x, count %d.\n",
2374 ha->board_name, spp->cpp_index, irq, reg, ha->iocount);
2375 if (spp->eoc == 0 || spp->cpp_index < 0
2376 || spp->cpp_index >= shost->can_queue)
2377 goto handled;
2378
2379 /* Find the mailbox to be serviced on this board */
2380 i = spp->cpp_index;
2381
2382 cpp = &(ha->cp[i]);
2383
2384 #if defined(DEBUG_GENERATE_ABORTS)
2385 if ((ha->iocount > 500) && ((ha->iocount % 500) < 3))
2386 goto handled;
2387 #endif
2388
2389 if (ha->cp_stat[i] == IGNORE) {
2390 ha->cp_stat[i] = FREE;
2391 goto handled;
2392 } else if (ha->cp_stat[i] == LOCKED) {
2393 ha->cp_stat[i] = FREE;
2394 printk("%s: ihdlr, mbox %d unlocked, count %d.\n", ha->board_name, i,
2395 ha->iocount);
2396 goto handled;
2397 } else if (ha->cp_stat[i] == FREE) {
2398 printk("%s: ihdlr, mbox %d is free, count %d.\n", ha->board_name, i,
2399 ha->iocount);
2400 goto handled;
2401 } else if (ha->cp_stat[i] == IN_RESET)
2402 printk("%s: ihdlr, mbox %d is in reset.\n", ha->board_name, i);
2403 else if (ha->cp_stat[i] != IN_USE)
2404 panic("%s: ihdlr, mbox %d, invalid cp_stat: %d.\n",
2405 ha->board_name, i, ha->cp_stat[i]);
2406
2407 ha->cp_stat[i] = FREE;
2408 SCpnt = cpp->SCpnt;
2409
2410 if (SCpnt == NULL)
2411 panic("%s: ihdlr, mbox %d, SCpnt == NULL.\n", ha->board_name, i);
2412
2413 if (SCpnt->host_scribble == NULL)
2414 panic("%s: ihdlr, mbox %d, pid %ld, SCpnt %p garbled.\n", ha->board_name,
2415 i, SCpnt->pid, SCpnt);
2416
2417 if (*(unsigned int *)SCpnt->host_scribble != i)
2418 panic("%s: ihdlr, mbox %d, pid %ld, index mismatch %d.\n",
2419 ha->board_name, i, SCpnt->pid,
2420 *(unsigned int *)SCpnt->host_scribble);
2421
2422 sync_dma(i, ha);
2423
2424 if (linked_comm && SCpnt->device->queue_depth > 2
2425 && TLDEV(SCpnt->device->type))
2426 flush_dev(SCpnt->device, SCpnt->request->sector, ha, 1);
2427
2428 tstatus = status_byte(spp->target_status);
2429
2430 #if defined(DEBUG_GENERATE_ERRORS)
2431 if ((ha->iocount > 500) && ((ha->iocount % 200) < 2))
2432 spp->adapter_status = 0x01;
2433 #endif
2434
2435 switch (spp->adapter_status) {
2436 case ASOK: /* status OK */
2437
2438 /* Forces a reset if a disk drive keeps returning BUSY */
2439 if (tstatus == BUSY && SCpnt->device->type != TYPE_TAPE)
2440 status = DID_ERROR << 16;
2441
2442 /* If there was a bus reset, redo operation on each target */
2443 else if (tstatus != GOOD && SCpnt->device->type == TYPE_DISK
2444 && ha->target_redo[SCpnt->device->id][SCpnt->
2445 device->
2446 channel])
2447 status = DID_BUS_BUSY << 16;
2448
2449 /* Works around a flaw in scsi.c */
2450 else if (tstatus == CHECK_CONDITION
2451 && SCpnt->device->type == TYPE_DISK
2452 && (SCpnt->sense_buffer[2] & 0xf) == RECOVERED_ERROR)
2453 status = DID_BUS_BUSY << 16;
2454
2455 else
2456 status = DID_OK << 16;
2457
2458 if (tstatus == GOOD)
2459 ha->target_redo[SCpnt->device->id][SCpnt->device->
2460 channel] = 0;
2461
2462 if (spp->target_status && SCpnt->device->type == TYPE_DISK &&
2463 (!(tstatus == CHECK_CONDITION && ha->iocount <= 1000 &&
2464 (SCpnt->sense_buffer[2] & 0xf) == NOT_READY)))
2465 printk("%s: ihdlr, target %d.%d:%d, pid %ld, "
2466 "target_status 0x%x, sense key 0x%x.\n",
2467 ha->board_name,
2468 SCpnt->device->channel, SCpnt->device->id,
2469 SCpnt->device->lun, SCpnt->pid,
2470 spp->target_status, SCpnt->sense_buffer[2]);
2471
2472 ha->target_to[SCpnt->device->id][SCpnt->device->channel] = 0;
2473
2474 if (ha->last_retried_pid == SCpnt->pid)
2475 ha->retries = 0;
2476
2477 break;
2478 case ASST: /* Selection Time Out */
2479 case 0x02: /* Command Time Out */
2480
2481 if (ha->target_to[SCpnt->device->id][SCpnt->device->channel] > 1)
2482 status = DID_ERROR << 16;
2483 else {
2484 status = DID_TIME_OUT << 16;
2485 ha->target_to[SCpnt->device->id][SCpnt->device->
2486 channel]++;
2487 }
2488
2489 break;
2490
2491 /* Perform a limited number of internal retries */
2492 case 0x03: /* SCSI Bus Reset Received */
2493 case 0x04: /* Initial Controller Power-up */
2494
2495 for (c = 0; c <= shost->max_channel; c++)
2496 for (k = 0; k < shost->max_id; k++)
2497 ha->target_redo[k][c] = 1;
2498
2499 if (SCpnt->device->type != TYPE_TAPE
2500 && ha->retries < MAX_INTERNAL_RETRIES) {
2501
2502 #if defined(DID_SOFT_ERROR)
2503 status = DID_SOFT_ERROR << 16;
2504 #else
2505 status = DID_BUS_BUSY << 16;
2506 #endif
2507
2508 ha->retries++;
2509 ha->last_retried_pid = SCpnt->pid;
2510 } else
2511 status = DID_ERROR << 16;
2512
2513 break;
2514 case 0x05: /* Unexpected Bus Phase */
2515 case 0x06: /* Unexpected Bus Free */
2516 case 0x07: /* Bus Parity Error */
2517 case 0x08: /* SCSI Hung */
2518 case 0x09: /* Unexpected Message Reject */
2519 case 0x0a: /* SCSI Bus Reset Stuck */
2520 case 0x0b: /* Auto Request-Sense Failed */
2521 case 0x0c: /* Controller Ram Parity Error */
2522 default:
2523 status = DID_ERROR << 16;
2524 break;
2525 }
2526
2527 SCpnt->result = status | spp->target_status;
2528
2529 #if defined(DEBUG_INTERRUPT)
2530 if (SCpnt->result || do_trace)
2531 #else
2532 if ((spp->adapter_status != ASOK && ha->iocount > 1000) ||
2533 (spp->adapter_status != ASOK &&
2534 spp->adapter_status != ASST && ha->iocount <= 1000) ||
2535 do_trace || msg_byte(spp->target_status))
2536 #endif
2537 scmd_printk(KERN_INFO, SCpnt, "ihdlr, mbox %2d, err 0x%x:%x,"
2538 " pid %ld, reg 0x%x, count %d.\n",
2539 i, spp->adapter_status, spp->target_status,
2540 SCpnt->pid, reg, ha->iocount);
2541
2542 unmap_dma(i, ha);
2543
2544 /* Set the command state to inactive */
2545 SCpnt->host_scribble = NULL;
2546
2547 SCpnt->scsi_done(SCpnt);
2548
2549 if (do_trace)
2550 printk("%s: ihdlr, exit, irq %d, count %d.\n", ha->board_name,
2551 irq, ha->iocount);
2552
2553 handled:
2554 return IRQ_HANDLED;
2555 none:
2556 return IRQ_NONE;
2557 }
2558
2559 static irqreturn_t do_interrupt_handler(int irq, void *shap,
2560 struct pt_regs *regs)
2561 {
2562 struct Scsi_Host *shost;
2563 unsigned int j;
2564 unsigned long spin_flags;
2565 irqreturn_t ret;
2566
2567 /* Check if the interrupt must be processed by this handler */
2568 if ((j = (unsigned int)((char *)shap - sha)) >= num_boards)
2569 return IRQ_NONE;
2570 shost = sh[j];
2571
2572 spin_lock_irqsave(shost->host_lock, spin_flags);
2573 ret = ihdlr(irq, shost);
2574 spin_unlock_irqrestore(shost->host_lock, spin_flags);
2575 return ret;
2576 }
2577
2578 static int eata2x_release(struct Scsi_Host *shost)
2579 {
2580 struct hostdata *ha = (struct hostdata *)shost->hostdata;
2581 unsigned int i;
2582
2583 for (i = 0; i < shost->can_queue; i++)
2584 kfree((&ha->cp[i])->sglist);
2585
2586 for (i = 0; i < shost->can_queue; i++)
2587 pci_unmap_single(ha->pdev, ha->cp[i].cp_dma_addr,
2588 sizeof(struct mscp), PCI_DMA_BIDIRECTIONAL);
2589
2590 if (ha->sp_cpu_addr)
2591 pci_free_consistent(ha->pdev, sizeof(struct mssp),
2592 ha->sp_cpu_addr, ha->sp_dma_addr);
2593
2594 free_irq(shost->irq, &sha[ha->board_number]);
2595
2596 if (shost->dma_channel != NO_DMA)
2597 free_dma(shost->dma_channel);
2598
2599 release_region(shost->io_port, shost->n_io_port);
2600 scsi_unregister(shost);
2601 return 0;
2602 }
2603
2604 #include "scsi_module.c"
2605
2606 #ifndef MODULE
2607 __setup("eata=", option_setup);
2608 #endif /* end MODULE */
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