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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 corresponding
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/string.h>
481 #include <linux/kernel.h>
482 #include <linux/ioport.h>
483 #include <linux/delay.h>
484 #include <linux/proc_fs.h>
485 #include <linux/blkdev.h>
486 #include <linux/interrupt.h>
487 #include <linux/stat.h>
488 #include <linux/pci.h>
489 #include <linux/init.h>
490 #include <linux/ctype.h>
491 #include <linux/spinlock.h>
492 #include <linux/dma-mapping.h>
493 #include <linux/slab.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_Host *, struct scsi_cmnd *);
509 static int eata2x_eh_abort(struct scsi_cmnd *);
510 static int eata2x_eh_host_reset(struct scsi_cmnd *);
511 static int eata2x_bios_param(struct scsi_device *, struct block_device *,
512 sector_t, int *);
513 static int eata2x_slave_configure(struct scsi_device *);
514
515 static struct scsi_host_template driver_template = {
516 .name = "EATA/DMA 2.0x rev. 8.10.00 ",
517 .detect = eata2x_detect,
518 .release = eata2x_release,
519 .queuecommand = eata2x_queuecommand,
520 .eh_abort_handler = eata2x_eh_abort,
521 .eh_host_reset_handler = eata2x_eh_host_reset,
522 .bios_param = eata2x_bios_param,
523 .slave_configure = eata2x_slave_configure,
524 .this_id = 7,
525 .unchecked_isa_dma = 1,
526 .use_clustering = ENABLE_CLUSTERING,
527 };
528
529 #if !defined(__BIG_ENDIAN_BITFIELD) && !defined(__LITTLE_ENDIAN_BITFIELD)
530 #error "Adjust your <asm/byteorder.h> defines"
531 #endif
532
533 /* Subversion values */
534 #define ISA 0
535 #define ESA 1
536
537 #undef FORCE_CONFIG
538
539 #undef DEBUG_LINKED_COMMANDS
540 #undef DEBUG_DETECT
541 #undef DEBUG_PCI_DETECT
542 #undef DEBUG_INTERRUPT
543 #undef DEBUG_RESET
544 #undef DEBUG_GENERATE_ERRORS
545 #undef DEBUG_GENERATE_ABORTS
546 #undef DEBUG_GEOMETRY
547
548 #define MAX_ISA 4
549 #define MAX_VESA 0
550 #define MAX_EISA 15
551 #define MAX_PCI 16
552 #define MAX_BOARDS (MAX_ISA + MAX_VESA + MAX_EISA + MAX_PCI)
553 #define MAX_CHANNEL 4
554 #define MAX_LUN 32
555 #define MAX_TARGET 32
556 #define MAX_MAILBOXES 64
557 #define MAX_SGLIST 64
558 #define MAX_LARGE_SGLIST 122
559 #define MAX_INTERNAL_RETRIES 64
560 #define MAX_CMD_PER_LUN 2
561 #define MAX_TAGGED_CMD_PER_LUN (MAX_MAILBOXES - MAX_CMD_PER_LUN)
562
563 #define SKIP ULONG_MAX
564 #define FREE 0
565 #define IN_USE 1
566 #define LOCKED 2
567 #define IN_RESET 3
568 #define IGNORE 4
569 #define READY 5
570 #define ABORTING 6
571 #define NO_DMA 0xff
572 #define MAXLOOP 10000
573 #define TAG_DISABLED 0
574 #define TAG_SIMPLE 1
575 #define TAG_ORDERED 2
576
577 #define REG_CMD 7
578 #define REG_STATUS 7
579 #define REG_AUX_STATUS 8
580 #define REG_DATA 0
581 #define REG_DATA2 1
582 #define REG_SEE 6
583 #define REG_LOW 2
584 #define REG_LM 3
585 #define REG_MID 4
586 #define REG_MSB 5
587 #define REGION_SIZE 9UL
588 #define MAX_ISA_ADDR 0x03ff
589 #define MIN_EISA_ADDR 0x1c88
590 #define MAX_EISA_ADDR 0xfc88
591 #define BSY_ASSERTED 0x80
592 #define DRQ_ASSERTED 0x08
593 #define ABSY_ASSERTED 0x01
594 #define IRQ_ASSERTED 0x02
595 #define READ_CONFIG_PIO 0xf0
596 #define SET_CONFIG_PIO 0xf1
597 #define SEND_CP_PIO 0xf2
598 #define RECEIVE_SP_PIO 0xf3
599 #define TRUNCATE_XFR_PIO 0xf4
600 #define RESET_PIO 0xf9
601 #define READ_CONFIG_DMA 0xfd
602 #define SET_CONFIG_DMA 0xfe
603 #define SEND_CP_DMA 0xff
604 #define ASOK 0x00
605 #define ASST 0x01
606
607 #define YESNO(a) ((a) ? 'y' : 'n')
608 #define TLDEV(type) ((type) == TYPE_DISK || (type) == TYPE_ROM)
609
610 /* "EATA", in Big Endian format */
611 #define EATA_SIG_BE 0x45415441
612
613 /* Number of valid bytes in the board config structure for EATA 2.0x */
614 #define EATA_2_0A_SIZE 28
615 #define EATA_2_0B_SIZE 30
616 #define EATA_2_0C_SIZE 34
617
618 /* Board info structure */
619 struct eata_info {
620 u_int32_t data_len; /* Number of valid bytes after this field */
621 u_int32_t sign; /* ASCII "EATA" signature */
622
623 #if defined(__BIG_ENDIAN_BITFIELD)
624 unchar version : 4,
625 : 4;
626 unchar haaval : 1,
627 ata : 1,
628 drqvld : 1,
629 dmasup : 1,
630 morsup : 1,
631 trnxfr : 1,
632 tarsup : 1,
633 ocsena : 1;
634 #else
635 unchar : 4, /* unused low nibble */
636 version : 4; /* EATA version, should be 0x1 */
637 unchar ocsena : 1, /* Overlap Command Support Enabled */
638 tarsup : 1, /* Target Mode Supported */
639 trnxfr : 1, /* Truncate Transfer Cmd NOT Necessary */
640 morsup : 1, /* More Supported */
641 dmasup : 1, /* DMA Supported */
642 drqvld : 1, /* DRQ Index (DRQX) is valid */
643 ata : 1, /* This is an ATA device */
644 haaval : 1; /* Host Adapter Address Valid */
645 #endif
646
647 ushort cp_pad_len; /* Number of pad bytes after cp_len */
648 unchar host_addr[4]; /* Host Adapter SCSI ID for channels 3, 2, 1, 0 */
649 u_int32_t cp_len; /* Number of valid bytes in cp */
650 u_int32_t sp_len; /* Number of valid bytes in sp */
651 ushort queue_size; /* Max number of cp that can be queued */
652 ushort unused;
653 ushort scatt_size; /* Max number of entries in scatter/gather table */
654
655 #if defined(__BIG_ENDIAN_BITFIELD)
656 unchar drqx : 2,
657 second : 1,
658 irq_tr : 1,
659 irq : 4;
660 unchar sync;
661 unchar : 4,
662 res1 : 1,
663 large_sg : 1,
664 forcaddr : 1,
665 isaena : 1;
666 unchar max_chan : 3,
667 max_id : 5;
668 unchar max_lun;
669 unchar eisa : 1,
670 pci : 1,
671 idquest : 1,
672 m1 : 1,
673 : 4;
674 #else
675 unchar irq : 4, /* Interrupt Request assigned to this controller */
676 irq_tr : 1, /* 0 for edge triggered, 1 for level triggered */
677 second : 1, /* 1 if this is a secondary (not primary) controller */
678 drqx : 2; /* DRQ Index (0=DMA0, 1=DMA7, 2=DMA6, 3=DMA5) */
679 unchar sync; /* 1 if scsi target id 7...0 is running sync scsi */
680
681 /* Structure extension defined in EATA 2.0B */
682 unchar isaena : 1, /* ISA i/o addressing is disabled/enabled */
683 forcaddr : 1, /* Port address has been forced */
684 large_sg : 1, /* 1 if large SG lists are supported */
685 res1 : 1,
686 : 4;
687 unchar max_id : 5, /* Max SCSI target ID number */
688 max_chan : 3; /* Max SCSI channel number on this board */
689
690 /* Structure extension defined in EATA 2.0C */
691 unchar max_lun; /* Max SCSI LUN number */
692 unchar
693 : 4,
694 m1 : 1, /* This is a PCI with an M1 chip installed */
695 idquest : 1, /* RAIDNUM returned is questionable */
696 pci : 1, /* This board is PCI */
697 eisa : 1; /* This board is EISA */
698 #endif
699
700 unchar raidnum; /* Uniquely identifies this HBA in a system */
701 unchar notused;
702
703 ushort ipad[247];
704 };
705
706 /* Board config structure */
707 struct eata_config {
708 ushort len; /* Number of bytes following this field */
709
710 #if defined(__BIG_ENDIAN_BITFIELD)
711 unchar : 4,
712 tarena : 1,
713 mdpena : 1,
714 ocena : 1,
715 edis : 1;
716 #else
717 unchar edis : 1, /* Disable EATA interface after config command */
718 ocena : 1, /* Overlapped Commands Enabled */
719 mdpena : 1, /* Transfer all Modified Data Pointer Messages */
720 tarena : 1, /* Target Mode Enabled for this controller */
721 : 4;
722 #endif
723 unchar cpad[511];
724 };
725
726 /* Returned status packet structure */
727 struct mssp {
728 #if defined(__BIG_ENDIAN_BITFIELD)
729 unchar eoc : 1,
730 adapter_status : 7;
731 #else
732 unchar adapter_status : 7, /* State related to current command */
733 eoc : 1; /* End Of Command (1 = command completed) */
734 #endif
735 unchar target_status; /* SCSI status received after data transfer */
736 unchar unused[2];
737 u_int32_t inv_res_len; /* Number of bytes not transferred */
738 u_int32_t cpp_index; /* Index of address set in cp */
739 char mess[12];
740 };
741
742 struct sg_list {
743 unsigned int address; /* Segment Address */
744 unsigned int num_bytes; /* Segment Length */
745 };
746
747 /* MailBox SCSI Command Packet */
748 struct mscp {
749 #if defined(__BIG_ENDIAN_BITFIELD)
750 unchar din : 1,
751 dout : 1,
752 interp : 1,
753 : 1,
754 sg : 1,
755 reqsen :1,
756 init : 1,
757 sreset : 1;
758 unchar sense_len;
759 unchar unused[3];
760 unchar : 7,
761 fwnest : 1;
762 unchar : 5,
763 hbaci : 1,
764 iat : 1,
765 phsunit : 1;
766 unchar channel : 3,
767 target : 5;
768 unchar one : 1,
769 dispri : 1,
770 luntar : 1,
771 lun : 5;
772 #else
773 unchar sreset :1, /* SCSI Bus Reset Signal should be asserted */
774 init :1, /* Re-initialize controller and self test */
775 reqsen :1, /* Transfer Request Sense Data to addr using DMA */
776 sg :1, /* Use Scatter/Gather */
777 :1,
778 interp :1, /* The controller interprets cp, not the target */
779 dout :1, /* Direction of Transfer is Out (Host to Target) */
780 din :1; /* Direction of Transfer is In (Target to Host) */
781 unchar sense_len; /* Request Sense Length */
782 unchar unused[3];
783 unchar fwnest : 1, /* Send command to a component of an Array Group */
784 : 7;
785 unchar phsunit : 1, /* Send to Target Physical Unit (bypass RAID) */
786 iat : 1, /* Inhibit Address Translation */
787 hbaci : 1, /* Inhibit HBA Caching for this command */
788 : 5;
789 unchar target : 5, /* SCSI target ID */
790 channel : 3; /* SCSI channel number */
791 unchar lun : 5, /* SCSI logical unit number */
792 luntar : 1, /* This cp is for Target (not LUN) */
793 dispri : 1, /* Disconnect Privilege granted */
794 one : 1; /* 1 */
795 #endif
796
797 unchar mess[3]; /* Massage to/from Target */
798 unchar cdb[12]; /* Command Descriptor Block */
799 u_int32_t data_len; /* If sg=0 Data Length, if sg=1 sglist length */
800 u_int32_t cpp_index; /* Index of address to be returned in sp */
801 u_int32_t data_address; /* If sg=0 Data Address, if sg=1 sglist address */
802 u_int32_t sp_dma_addr; /* Address where sp is DMA'ed when cp completes */
803 u_int32_t sense_addr; /* Address where Sense Data is DMA'ed on error */
804
805 /* Additional fields begin here. */
806 struct scsi_cmnd *SCpnt;
807
808 /* All the cp structure is zero filled by queuecommand except the
809 following CP_TAIL_SIZE bytes, initialized by detect */
810 dma_addr_t cp_dma_addr; /* dma handle for this cp structure */
811 struct sg_list *sglist; /* pointer to the allocated SG list */
812 };
813
814 #define CP_TAIL_SIZE (sizeof(struct sglist *) + sizeof(dma_addr_t))
815
816 struct hostdata {
817 struct mscp cp[MAX_MAILBOXES]; /* Mailboxes for this board */
818 unsigned int cp_stat[MAX_MAILBOXES]; /* FREE, IN_USE, LOCKED, IN_RESET */
819 unsigned int last_cp_used; /* Index of last mailbox used */
820 unsigned int iocount; /* Total i/o done for this board */
821 int board_number; /* Number of this board */
822 char board_name[16]; /* Name of this board */
823 int in_reset; /* True if board is doing a reset */
824 int target_to[MAX_TARGET][MAX_CHANNEL]; /* N. of timeout errors on target */
825 int target_redo[MAX_TARGET][MAX_CHANNEL]; /* If 1 redo i/o on target */
826 unsigned int retries; /* Number of internal retries */
827 unsigned long last_retried_pid; /* Pid of last retried command */
828 unsigned char subversion; /* Bus type, either ISA or EISA/PCI */
829 unsigned char protocol_rev; /* EATA 2.0 rev., 'A' or 'B' or 'C' */
830 unsigned char is_pci; /* 1 is bus type is PCI */
831 struct pci_dev *pdev; /* pdev for PCI bus, NULL otherwise */
832 struct mssp *sp_cpu_addr; /* cpu addr for DMA buffer sp */
833 dma_addr_t sp_dma_addr; /* dma handle for DMA buffer sp */
834 struct mssp sp; /* Local copy of sp buffer */
835 };
836
837 static struct Scsi_Host *sh[MAX_BOARDS];
838 static const char *driver_name = "EATA";
839 static char sha[MAX_BOARDS];
840
841 /* Initialize num_boards so that ihdlr can work while detect is in progress */
842 static unsigned int num_boards = MAX_BOARDS;
843
844 static unsigned long io_port[] = {
845
846 /* Space for MAX_INT_PARAM ports usable while loading as a module */
847 SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP,
848 SKIP, SKIP,
849
850 /* First ISA */
851 0x1f0,
852
853 /* Space for MAX_PCI ports possibly reported by PCI_BIOS */
854 SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP,
855 SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP,
856
857 /* MAX_EISA ports */
858 0x1c88, 0x2c88, 0x3c88, 0x4c88, 0x5c88, 0x6c88, 0x7c88, 0x8c88,
859 0x9c88, 0xac88, 0xbc88, 0xcc88, 0xdc88, 0xec88, 0xfc88,
860
861 /* Other (MAX_ISA - 1) ports */
862 0x170, 0x230, 0x330,
863
864 /* End of list */
865 0x0
866 };
867
868 /* Device is Big Endian */
869 #define H2DEV(x) cpu_to_be32(x)
870 #define DEV2H(x) be32_to_cpu(x)
871 #define H2DEV16(x) cpu_to_be16(x)
872 #define DEV2H16(x) be16_to_cpu(x)
873
874 /* But transfer orientation from the 16 bit data register is Little Endian */
875 #define REG2H(x) le16_to_cpu(x)
876
877 static irqreturn_t do_interrupt_handler(int, void *);
878 static void flush_dev(struct scsi_device *, unsigned long, struct hostdata *,
879 unsigned int);
880 static int do_trace = 0;
881 static int setup_done = 0;
882 static int link_statistics;
883 static int ext_tran = 0;
884 static int rev_scan = 1;
885
886 #if defined(CONFIG_SCSI_EATA_TAGGED_QUEUE)
887 static int tag_mode = TAG_SIMPLE;
888 #else
889 static int tag_mode = TAG_DISABLED;
890 #endif
891
892 #if defined(CONFIG_SCSI_EATA_LINKED_COMMANDS)
893 static int linked_comm = 1;
894 #else
895 static int linked_comm = 0;
896 #endif
897
898 #if defined(CONFIG_SCSI_EATA_MAX_TAGS)
899 static int max_queue_depth = CONFIG_SCSI_EATA_MAX_TAGS;
900 #else
901 static int max_queue_depth = MAX_CMD_PER_LUN;
902 #endif
903
904 #if defined(CONFIG_ISA)
905 static int isa_probe = 1;
906 #else
907 static int isa_probe = 0;
908 #endif
909
910 #if defined(CONFIG_EISA)
911 static int eisa_probe = 1;
912 #else
913 static int eisa_probe = 0;
914 #endif
915
916 #if defined(CONFIG_PCI)
917 static int pci_probe = 1;
918 #else
919 static int pci_probe = 0;
920 #endif
921
922 #define MAX_INT_PARAM 10
923 #define MAX_BOOT_OPTIONS_SIZE 256
924 static char boot_options[MAX_BOOT_OPTIONS_SIZE];
925
926 #if defined(MODULE)
927 #include <linux/module.h>
928 #include <linux/moduleparam.h>
929
930 module_param_string(eata, boot_options, MAX_BOOT_OPTIONS_SIZE, 0);
931 MODULE_PARM_DESC(eata, " equivalent to the \"eata=...\" kernel boot option."
932 " Example: modprobe eata \"eata=0x7410,0x230,lc:y,tm:0,mq:4,ep:n\"");
933 MODULE_AUTHOR("Dario Ballabio");
934 MODULE_LICENSE("GPL");
935 MODULE_DESCRIPTION("EATA/DMA SCSI Driver");
936
937 #endif
938
939 static int eata2x_slave_configure(struct scsi_device *dev)
940 {
941 int tqd, utqd;
942 char *tag_suffix, *link_suffix;
943
944 utqd = MAX_CMD_PER_LUN;
945 tqd = max_queue_depth;
946
947 if (TLDEV(dev->type) && dev->tagged_supported) {
948 if (tag_mode == TAG_SIMPLE) {
949 scsi_adjust_queue_depth(dev, MSG_SIMPLE_TAG, tqd);
950 tag_suffix = ", simple tags";
951 } else if (tag_mode == TAG_ORDERED) {
952 scsi_adjust_queue_depth(dev, MSG_ORDERED_TAG, tqd);
953 tag_suffix = ", ordered tags";
954 } else {
955 scsi_adjust_queue_depth(dev, 0, tqd);
956 tag_suffix = ", no tags";
957 }
958 } else if (TLDEV(dev->type) && linked_comm) {
959 scsi_adjust_queue_depth(dev, 0, tqd);
960 tag_suffix = ", untagged";
961 } else {
962 scsi_adjust_queue_depth(dev, 0, utqd);
963 tag_suffix = "";
964 }
965
966 if (TLDEV(dev->type) && linked_comm && dev->queue_depth > 2)
967 link_suffix = ", sorted";
968 else if (TLDEV(dev->type))
969 link_suffix = ", unsorted";
970 else
971 link_suffix = "";
972
973 sdev_printk(KERN_INFO, dev,
974 "cmds/lun %d%s%s.\n",
975 dev->queue_depth, link_suffix, tag_suffix);
976
977 return 0;
978 }
979
980 static int wait_on_busy(unsigned long iobase, unsigned int loop)
981 {
982 while (inb(iobase + REG_AUX_STATUS) & ABSY_ASSERTED) {
983 udelay(1L);
984 if (--loop == 0)
985 return 1;
986 }
987 return 0;
988 }
989
990 static int do_dma(unsigned long iobase, unsigned long addr, unchar cmd)
991 {
992 unsigned char *byaddr;
993 unsigned long devaddr;
994
995 if (wait_on_busy(iobase, (addr ? MAXLOOP * 100 : MAXLOOP)))
996 return 1;
997
998 if (addr) {
999 devaddr = H2DEV(addr);
1000 byaddr = (unsigned char *)&devaddr;
1001 outb(byaddr[3], iobase + REG_LOW);
1002 outb(byaddr[2], iobase + REG_LM);
1003 outb(byaddr[1], iobase + REG_MID);
1004 outb(byaddr[0], iobase + REG_MSB);
1005 }
1006
1007 outb(cmd, iobase + REG_CMD);
1008 return 0;
1009 }
1010
1011 static int read_pio(unsigned long iobase, ushort * start, ushort * end)
1012 {
1013 unsigned int loop = MAXLOOP;
1014 ushort *p;
1015
1016 for (p = start; p <= end; p++) {
1017 while (!(inb(iobase + REG_STATUS) & DRQ_ASSERTED)) {
1018 udelay(1L);
1019 if (--loop == 0)
1020 return 1;
1021 }
1022 loop = MAXLOOP;
1023 *p = REG2H(inw(iobase));
1024 }
1025
1026 return 0;
1027 }
1028
1029 static struct pci_dev *get_pci_dev(unsigned long port_base)
1030 {
1031 #if defined(CONFIG_PCI)
1032 unsigned int addr;
1033 struct pci_dev *dev = NULL;
1034
1035 while ((dev = pci_get_class(PCI_CLASS_STORAGE_SCSI << 8, dev))) {
1036 addr = pci_resource_start(dev, 0);
1037
1038 #if defined(DEBUG_PCI_DETECT)
1039 printk("%s: get_pci_dev, bus %d, devfn 0x%x, addr 0x%x.\n",
1040 driver_name, dev->bus->number, dev->devfn, addr);
1041 #endif
1042
1043 /* we are in so much trouble for a pci hotplug system with this driver
1044 * anyway, so doing this at least lets people unload the driver and not
1045 * cause memory problems, but in general this is a bad thing to do (this
1046 * driver needs to be converted to the proper PCI api someday... */
1047 pci_dev_put(dev);
1048 if (addr + PCI_BASE_ADDRESS_0 == port_base)
1049 return dev;
1050 }
1051 #endif /* end CONFIG_PCI */
1052 return NULL;
1053 }
1054
1055 static void enable_pci_ports(void)
1056 {
1057 #if defined(CONFIG_PCI)
1058 struct pci_dev *dev = NULL;
1059
1060 while ((dev = pci_get_class(PCI_CLASS_STORAGE_SCSI << 8, dev))) {
1061 #if defined(DEBUG_PCI_DETECT)
1062 printk("%s: enable_pci_ports, bus %d, devfn 0x%x.\n",
1063 driver_name, dev->bus->number, dev->devfn);
1064 #endif
1065
1066 if (pci_enable_device(dev))
1067 printk
1068 ("%s: warning, pci_enable_device failed, bus %d devfn 0x%x.\n",
1069 driver_name, dev->bus->number, dev->devfn);
1070 }
1071
1072 #endif /* end CONFIG_PCI */
1073 }
1074
1075 static int port_detect(unsigned long port_base, unsigned int j,
1076 struct scsi_host_template *tpnt)
1077 {
1078 unsigned char irq, dma_channel, subversion, i, is_pci = 0;
1079 unsigned char protocol_rev;
1080 struct eata_info info;
1081 char *bus_type, dma_name[16];
1082 struct pci_dev *pdev;
1083 /* Allowed DMA channels for ISA (0 indicates reserved) */
1084 unsigned char dma_channel_table[4] = { 5, 6, 7, 0 };
1085 struct Scsi_Host *shost;
1086 struct hostdata *ha;
1087 char name[16];
1088
1089 sprintf(name, "%s%d", driver_name, j);
1090
1091 if (!request_region(port_base, REGION_SIZE, driver_name)) {
1092 #if defined(DEBUG_DETECT)
1093 printk("%s: address 0x%03lx in use, skipping probe.\n", name,
1094 port_base);
1095 #endif
1096 goto fail;
1097 }
1098
1099 if (do_dma(port_base, 0, READ_CONFIG_PIO)) {
1100 #if defined(DEBUG_DETECT)
1101 printk("%s: detect, do_dma failed at 0x%03lx.\n", name,
1102 port_base);
1103 #endif
1104 goto freelock;
1105 }
1106
1107 /* Read the info structure */
1108 if (read_pio(port_base, (ushort *) & info, (ushort *) & info.ipad[0])) {
1109 #if defined(DEBUG_DETECT)
1110 printk("%s: detect, read_pio failed at 0x%03lx.\n", name,
1111 port_base);
1112 #endif
1113 goto freelock;
1114 }
1115
1116 info.data_len = DEV2H(info.data_len);
1117 info.sign = DEV2H(info.sign);
1118 info.cp_pad_len = DEV2H16(info.cp_pad_len);
1119 info.cp_len = DEV2H(info.cp_len);
1120 info.sp_len = DEV2H(info.sp_len);
1121 info.scatt_size = DEV2H16(info.scatt_size);
1122 info.queue_size = DEV2H16(info.queue_size);
1123
1124 /* Check the controller "EATA" signature */
1125 if (info.sign != EATA_SIG_BE) {
1126 #if defined(DEBUG_DETECT)
1127 printk("%s: signature 0x%04x discarded.\n", name, info.sign);
1128 #endif
1129 goto freelock;
1130 }
1131
1132 if (info.data_len < EATA_2_0A_SIZE) {
1133 printk
1134 ("%s: config structure size (%d bytes) too short, detaching.\n",
1135 name, info.data_len);
1136 goto freelock;
1137 } else if (info.data_len == EATA_2_0A_SIZE)
1138 protocol_rev = 'A';
1139 else if (info.data_len == EATA_2_0B_SIZE)
1140 protocol_rev = 'B';
1141 else
1142 protocol_rev = 'C';
1143
1144 if (protocol_rev != 'A' && info.forcaddr) {
1145 printk("%s: warning, port address has been forced.\n", name);
1146 bus_type = "PCI";
1147 is_pci = 1;
1148 subversion = ESA;
1149 } else if (port_base > MAX_EISA_ADDR
1150 || (protocol_rev == 'C' && info.pci)) {
1151 bus_type = "PCI";
1152 is_pci = 1;
1153 subversion = ESA;
1154 } else if (port_base >= MIN_EISA_ADDR
1155 || (protocol_rev == 'C' && info.eisa)) {
1156 bus_type = "EISA";
1157 subversion = ESA;
1158 } else if (protocol_rev == 'C' && !info.eisa && !info.pci) {
1159 bus_type = "ISA";
1160 subversion = ISA;
1161 } else if (port_base > MAX_ISA_ADDR) {
1162 bus_type = "PCI";
1163 is_pci = 1;
1164 subversion = ESA;
1165 } else {
1166 bus_type = "ISA";
1167 subversion = ISA;
1168 }
1169
1170 if (!info.haaval || info.ata) {
1171 printk
1172 ("%s: address 0x%03lx, unusable %s board (%d%d), detaching.\n",
1173 name, port_base, bus_type, info.haaval, info.ata);
1174 goto freelock;
1175 }
1176
1177 if (info.drqvld) {
1178 if (subversion == ESA)
1179 printk("%s: warning, weird %s board using DMA.\n", name,
1180 bus_type);
1181
1182 subversion = ISA;
1183 dma_channel = dma_channel_table[3 - info.drqx];
1184 } else {
1185 if (subversion == ISA)
1186 printk("%s: warning, weird %s board not using DMA.\n",
1187 name, bus_type);
1188
1189 subversion = ESA;
1190 dma_channel = NO_DMA;
1191 }
1192
1193 if (!info.dmasup)
1194 printk("%s: warning, DMA protocol support not asserted.\n",
1195 name);
1196
1197 irq = info.irq;
1198
1199 if (subversion == ESA && !info.irq_tr)
1200 printk
1201 ("%s: warning, LEVEL triggering is suggested for IRQ %u.\n",
1202 name, irq);
1203
1204 if (is_pci) {
1205 pdev = get_pci_dev(port_base);
1206 if (!pdev)
1207 printk
1208 ("%s: warning, failed to get pci_dev structure.\n",
1209 name);
1210 } else
1211 pdev = NULL;
1212
1213 if (pdev && (irq != pdev->irq)) {
1214 printk("%s: IRQ %u mapped to IO-APIC IRQ %u.\n", name, irq,
1215 pdev->irq);
1216 irq = pdev->irq;
1217 }
1218
1219 /* Board detected, allocate its IRQ */
1220 if (request_irq(irq, do_interrupt_handler,
1221 (subversion == ESA) ? IRQF_SHARED : 0,
1222 driver_name, (void *)&sha[j])) {
1223 printk("%s: unable to allocate IRQ %u, detaching.\n", name,
1224 irq);
1225 goto freelock;
1226 }
1227
1228 if (subversion == ISA && request_dma(dma_channel, driver_name)) {
1229 printk("%s: unable to allocate DMA channel %u, detaching.\n",
1230 name, dma_channel);
1231 goto freeirq;
1232 }
1233 #if defined(FORCE_CONFIG)
1234 {
1235 struct eata_config *cf;
1236 dma_addr_t cf_dma_addr;
1237
1238 cf = pci_zalloc_consistent(pdev, sizeof(struct eata_config),
1239 &cf_dma_addr);
1240
1241 if (!cf) {
1242 printk
1243 ("%s: config, pci_alloc_consistent failed, detaching.\n",
1244 name);
1245 goto freedma;
1246 }
1247
1248 /* Set board configuration */
1249 cf->len = (ushort) H2DEV16((ushort) 510);
1250 cf->ocena = 1;
1251
1252 if (do_dma(port_base, cf_dma_addr, SET_CONFIG_DMA)) {
1253 printk
1254 ("%s: busy timeout sending configuration, detaching.\n",
1255 name);
1256 pci_free_consistent(pdev, sizeof(struct eata_config),
1257 cf, cf_dma_addr);
1258 goto freedma;
1259 }
1260
1261 }
1262 #endif
1263
1264 sh[j] = shost = scsi_register(tpnt, sizeof(struct hostdata));
1265 if (shost == NULL) {
1266 printk("%s: unable to register host, detaching.\n", name);
1267 goto freedma;
1268 }
1269
1270 shost->io_port = port_base;
1271 shost->unique_id = port_base;
1272 shost->n_io_port = REGION_SIZE;
1273 shost->dma_channel = dma_channel;
1274 shost->irq = irq;
1275 shost->sg_tablesize = (ushort) info.scatt_size;
1276 shost->this_id = (ushort) info.host_addr[3];
1277 shost->can_queue = (ushort) info.queue_size;
1278 shost->cmd_per_lun = MAX_CMD_PER_LUN;
1279
1280 ha = (struct hostdata *)shost->hostdata;
1281
1282 memset(ha, 0, sizeof(struct hostdata));
1283 ha->subversion = subversion;
1284 ha->protocol_rev = protocol_rev;
1285 ha->is_pci = is_pci;
1286 ha->pdev = pdev;
1287 ha->board_number = j;
1288
1289 if (ha->subversion == ESA)
1290 shost->unchecked_isa_dma = 0;
1291 else {
1292 unsigned long flags;
1293 shost->unchecked_isa_dma = 1;
1294
1295 flags = claim_dma_lock();
1296 disable_dma(dma_channel);
1297 clear_dma_ff(dma_channel);
1298 set_dma_mode(dma_channel, DMA_MODE_CASCADE);
1299 enable_dma(dma_channel);
1300 release_dma_lock(flags);
1301
1302 }
1303
1304 strcpy(ha->board_name, name);
1305
1306 /* DPT PM2012 does not allow to detect sg_tablesize correctly */
1307 if (shost->sg_tablesize > MAX_SGLIST || shost->sg_tablesize < 2) {
1308 printk("%s: detect, wrong n. of SG lists %d, fixed.\n",
1309 ha->board_name, shost->sg_tablesize);
1310 shost->sg_tablesize = MAX_SGLIST;
1311 }
1312
1313 /* DPT PM2012 does not allow to detect can_queue correctly */
1314 if (shost->can_queue > MAX_MAILBOXES || shost->can_queue < 2) {
1315 printk("%s: detect, wrong n. of mbox %d, fixed.\n",
1316 ha->board_name, shost->can_queue);
1317 shost->can_queue = MAX_MAILBOXES;
1318 }
1319
1320 if (protocol_rev != 'A') {
1321 if (info.max_chan > 0 && info.max_chan < MAX_CHANNEL)
1322 shost->max_channel = info.max_chan;
1323
1324 if (info.max_id > 7 && info.max_id < MAX_TARGET)
1325 shost->max_id = info.max_id + 1;
1326
1327 if (info.large_sg && shost->sg_tablesize == MAX_SGLIST)
1328 shost->sg_tablesize = MAX_LARGE_SGLIST;
1329 }
1330
1331 if (protocol_rev == 'C') {
1332 if (info.max_lun > 7 && info.max_lun < MAX_LUN)
1333 shost->max_lun = info.max_lun + 1;
1334 }
1335
1336 if (dma_channel == NO_DMA)
1337 sprintf(dma_name, "%s", "BMST");
1338 else
1339 sprintf(dma_name, "DMA %u", dma_channel);
1340
1341 for (i = 0; i < shost->can_queue; i++)
1342 ha->cp[i].cp_dma_addr = pci_map_single(ha->pdev,
1343 &ha->cp[i],
1344 sizeof(struct mscp),
1345 PCI_DMA_BIDIRECTIONAL);
1346
1347 for (i = 0; i < shost->can_queue; i++) {
1348 size_t sz = shost->sg_tablesize *sizeof(struct sg_list);
1349 gfp_t gfp_mask = (shost->unchecked_isa_dma ? GFP_DMA : 0) | GFP_ATOMIC;
1350 ha->cp[i].sglist = kmalloc(sz, gfp_mask);
1351 if (!ha->cp[i].sglist) {
1352 printk
1353 ("%s: kmalloc SGlist failed, mbox %d, detaching.\n",
1354 ha->board_name, i);
1355 goto release;
1356 }
1357 }
1358
1359 if (!(ha->sp_cpu_addr = pci_alloc_consistent(ha->pdev,
1360 sizeof(struct mssp),
1361 &ha->sp_dma_addr))) {
1362 printk("%s: pci_alloc_consistent failed, detaching.\n", ha->board_name);
1363 goto release;
1364 }
1365
1366 if (max_queue_depth > MAX_TAGGED_CMD_PER_LUN)
1367 max_queue_depth = MAX_TAGGED_CMD_PER_LUN;
1368
1369 if (max_queue_depth < MAX_CMD_PER_LUN)
1370 max_queue_depth = MAX_CMD_PER_LUN;
1371
1372 if (tag_mode != TAG_DISABLED && tag_mode != TAG_SIMPLE)
1373 tag_mode = TAG_ORDERED;
1374
1375 if (j == 0) {
1376 printk
1377 ("EATA/DMA 2.0x: Copyright (C) 1994-2003 Dario Ballabio.\n");
1378 printk
1379 ("%s config options -> tm:%d, lc:%c, mq:%d, rs:%c, et:%c, "
1380 "ip:%c, ep:%c, pp:%c.\n", driver_name, tag_mode,
1381 YESNO(linked_comm), max_queue_depth, YESNO(rev_scan),
1382 YESNO(ext_tran), YESNO(isa_probe), YESNO(eisa_probe),
1383 YESNO(pci_probe));
1384 }
1385
1386 printk("%s: 2.0%c, %s 0x%03lx, IRQ %u, %s, SG %d, MB %d.\n",
1387 ha->board_name, ha->protocol_rev, bus_type,
1388 (unsigned long)shost->io_port, shost->irq, dma_name,
1389 shost->sg_tablesize, shost->can_queue);
1390
1391 if (shost->max_id > 8 || shost->max_lun > 8)
1392 printk
1393 ("%s: wide SCSI support enabled, max_id %u, max_lun %llu.\n",
1394 ha->board_name, shost->max_id, shost->max_lun);
1395
1396 for (i = 0; i <= shost->max_channel; i++)
1397 printk("%s: SCSI channel %u enabled, host target ID %d.\n",
1398 ha->board_name, i, info.host_addr[3 - i]);
1399
1400 #if defined(DEBUG_DETECT)
1401 printk("%s: Vers. 0x%x, ocs %u, tar %u, trnxfr %u, more %u, SYNC 0x%x, "
1402 "sec. %u, infol %d, cpl %d spl %d.\n", name, info.version,
1403 info.ocsena, info.tarsup, info.trnxfr, info.morsup, info.sync,
1404 info.second, info.data_len, info.cp_len, info.sp_len);
1405
1406 if (protocol_rev == 'B' || protocol_rev == 'C')
1407 printk("%s: isaena %u, forcaddr %u, max_id %u, max_chan %u, "
1408 "large_sg %u, res1 %u.\n", name, info.isaena,
1409 info.forcaddr, info.max_id, info.max_chan, info.large_sg,
1410 info.res1);
1411
1412 if (protocol_rev == 'C')
1413 printk("%s: max_lun %u, m1 %u, idquest %u, pci %u, eisa %u, "
1414 "raidnum %u.\n", name, info.max_lun, info.m1,
1415 info.idquest, info.pci, info.eisa, info.raidnum);
1416 #endif
1417
1418 if (ha->pdev) {
1419 pci_set_master(ha->pdev);
1420 if (pci_set_dma_mask(ha->pdev, DMA_BIT_MASK(32)))
1421 printk("%s: warning, pci_set_dma_mask failed.\n",
1422 ha->board_name);
1423 }
1424
1425 return 1;
1426
1427 freedma:
1428 if (subversion == ISA)
1429 free_dma(dma_channel);
1430 freeirq:
1431 free_irq(irq, &sha[j]);
1432 freelock:
1433 release_region(port_base, REGION_SIZE);
1434 fail:
1435 return 0;
1436
1437 release:
1438 eata2x_release(shost);
1439 return 0;
1440 }
1441
1442 static void internal_setup(char *str, int *ints)
1443 {
1444 int i, argc = ints[0];
1445 char *cur = str, *pc;
1446
1447 if (argc > 0) {
1448 if (argc > MAX_INT_PARAM)
1449 argc = MAX_INT_PARAM;
1450
1451 for (i = 0; i < argc; i++)
1452 io_port[i] = ints[i + 1];
1453
1454 io_port[i] = 0;
1455 setup_done = 1;
1456 }
1457
1458 while (cur && (pc = strchr(cur, ':'))) {
1459 int val = 0, c = *++pc;
1460
1461 if (c == 'n' || c == 'N')
1462 val = 0;
1463 else if (c == 'y' || c == 'Y')
1464 val = 1;
1465 else
1466 val = (int)simple_strtoul(pc, NULL, 0);
1467
1468 if (!strncmp(cur, "lc:", 3))
1469 linked_comm = val;
1470 else if (!strncmp(cur, "tm:", 3))
1471 tag_mode = val;
1472 else if (!strncmp(cur, "tc:", 3))
1473 tag_mode = val;
1474 else if (!strncmp(cur, "mq:", 3))
1475 max_queue_depth = val;
1476 else if (!strncmp(cur, "ls:", 3))
1477 link_statistics = val;
1478 else if (!strncmp(cur, "et:", 3))
1479 ext_tran = val;
1480 else if (!strncmp(cur, "rs:", 3))
1481 rev_scan = val;
1482 else if (!strncmp(cur, "ip:", 3))
1483 isa_probe = val;
1484 else if (!strncmp(cur, "ep:", 3))
1485 eisa_probe = val;
1486 else if (!strncmp(cur, "pp:", 3))
1487 pci_probe = val;
1488
1489 if ((cur = strchr(cur, ',')))
1490 ++cur;
1491 }
1492
1493 return;
1494 }
1495
1496 static int option_setup(char *str)
1497 {
1498 int ints[MAX_INT_PARAM];
1499 char *cur = str;
1500 int i = 1;
1501
1502 while (cur && isdigit(*cur) && i < MAX_INT_PARAM) {
1503 ints[i++] = simple_strtoul(cur, NULL, 0);
1504
1505 if ((cur = strchr(cur, ',')) != NULL)
1506 cur++;
1507 }
1508
1509 ints[0] = i - 1;
1510 internal_setup(cur, ints);
1511 return 1;
1512 }
1513
1514 static void add_pci_ports(void)
1515 {
1516 #if defined(CONFIG_PCI)
1517 unsigned int addr, k;
1518 struct pci_dev *dev = NULL;
1519
1520 for (k = 0; k < MAX_PCI; k++) {
1521
1522 if (!(dev = pci_get_class(PCI_CLASS_STORAGE_SCSI << 8, dev)))
1523 break;
1524
1525 if (pci_enable_device(dev)) {
1526 #if defined(DEBUG_PCI_DETECT)
1527 printk
1528 ("%s: detect, bus %d, devfn 0x%x, pci_enable_device failed.\n",
1529 driver_name, dev->bus->number, dev->devfn);
1530 #endif
1531
1532 continue;
1533 }
1534
1535 addr = pci_resource_start(dev, 0);
1536
1537 #if defined(DEBUG_PCI_DETECT)
1538 printk("%s: detect, seq. %d, bus %d, devfn 0x%x, addr 0x%x.\n",
1539 driver_name, k, dev->bus->number, dev->devfn, addr);
1540 #endif
1541
1542 /* Order addresses according to rev_scan value */
1543 io_port[MAX_INT_PARAM + (rev_scan ? (MAX_PCI - k) : (1 + k))] =
1544 addr + PCI_BASE_ADDRESS_0;
1545 }
1546
1547 pci_dev_put(dev);
1548 #endif /* end CONFIG_PCI */
1549 }
1550
1551 static int eata2x_detect(struct scsi_host_template *tpnt)
1552 {
1553 unsigned int j = 0, k;
1554
1555 tpnt->proc_name = "eata2x";
1556
1557 if (strlen(boot_options))
1558 option_setup(boot_options);
1559
1560 #if defined(MODULE)
1561 /* io_port could have been modified when loading as a module */
1562 if (io_port[0] != SKIP) {
1563 setup_done = 1;
1564 io_port[MAX_INT_PARAM] = 0;
1565 }
1566 #endif
1567
1568 for (k = MAX_INT_PARAM; io_port[k]; k++)
1569 if (io_port[k] == SKIP)
1570 continue;
1571 else if (io_port[k] <= MAX_ISA_ADDR) {
1572 if (!isa_probe)
1573 io_port[k] = SKIP;
1574 } else if (io_port[k] >= MIN_EISA_ADDR
1575 && io_port[k] <= MAX_EISA_ADDR) {
1576 if (!eisa_probe)
1577 io_port[k] = SKIP;
1578 }
1579
1580 if (pci_probe) {
1581 if (!setup_done)
1582 add_pci_ports();
1583 else
1584 enable_pci_ports();
1585 }
1586
1587 for (k = 0; io_port[k]; k++) {
1588
1589 if (io_port[k] == SKIP)
1590 continue;
1591
1592 if (j < MAX_BOARDS && port_detect(io_port[k], j, tpnt))
1593 j++;
1594 }
1595
1596 num_boards = j;
1597 return j;
1598 }
1599
1600 static void map_dma(unsigned int i, struct hostdata *ha)
1601 {
1602 unsigned int k, pci_dir;
1603 int count;
1604 struct scatterlist *sg;
1605 struct mscp *cpp;
1606 struct scsi_cmnd *SCpnt;
1607
1608 cpp = &ha->cp[i];
1609 SCpnt = cpp->SCpnt;
1610 pci_dir = SCpnt->sc_data_direction;
1611
1612 if (SCpnt->sense_buffer)
1613 cpp->sense_addr =
1614 H2DEV(pci_map_single(ha->pdev, SCpnt->sense_buffer,
1615 SCSI_SENSE_BUFFERSIZE, PCI_DMA_FROMDEVICE));
1616
1617 cpp->sense_len = SCSI_SENSE_BUFFERSIZE;
1618
1619 if (!scsi_sg_count(SCpnt)) {
1620 cpp->data_len = 0;
1621 return;
1622 }
1623
1624 count = pci_map_sg(ha->pdev, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
1625 pci_dir);
1626 BUG_ON(!count);
1627
1628 scsi_for_each_sg(SCpnt, sg, count, k) {
1629 cpp->sglist[k].address = H2DEV(sg_dma_address(sg));
1630 cpp->sglist[k].num_bytes = H2DEV(sg_dma_len(sg));
1631 }
1632
1633 cpp->sg = 1;
1634 cpp->data_address = H2DEV(pci_map_single(ha->pdev, cpp->sglist,
1635 scsi_sg_count(SCpnt) *
1636 sizeof(struct sg_list),
1637 pci_dir));
1638 cpp->data_len = H2DEV((scsi_sg_count(SCpnt) * sizeof(struct sg_list)));
1639 }
1640
1641 static void unmap_dma(unsigned int i, struct hostdata *ha)
1642 {
1643 unsigned int pci_dir;
1644 struct mscp *cpp;
1645 struct scsi_cmnd *SCpnt;
1646
1647 cpp = &ha->cp[i];
1648 SCpnt = cpp->SCpnt;
1649 pci_dir = SCpnt->sc_data_direction;
1650
1651 if (DEV2H(cpp->sense_addr))
1652 pci_unmap_single(ha->pdev, DEV2H(cpp->sense_addr),
1653 DEV2H(cpp->sense_len), PCI_DMA_FROMDEVICE);
1654
1655 if (scsi_sg_count(SCpnt))
1656 pci_unmap_sg(ha->pdev, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
1657 pci_dir);
1658
1659 if (!DEV2H(cpp->data_len))
1660 pci_dir = PCI_DMA_BIDIRECTIONAL;
1661
1662 if (DEV2H(cpp->data_address))
1663 pci_unmap_single(ha->pdev, DEV2H(cpp->data_address),
1664 DEV2H(cpp->data_len), pci_dir);
1665 }
1666
1667 static void sync_dma(unsigned int i, struct hostdata *ha)
1668 {
1669 unsigned int pci_dir;
1670 struct mscp *cpp;
1671 struct scsi_cmnd *SCpnt;
1672
1673 cpp = &ha->cp[i];
1674 SCpnt = cpp->SCpnt;
1675 pci_dir = SCpnt->sc_data_direction;
1676
1677 if (DEV2H(cpp->sense_addr))
1678 pci_dma_sync_single_for_cpu(ha->pdev, DEV2H(cpp->sense_addr),
1679 DEV2H(cpp->sense_len),
1680 PCI_DMA_FROMDEVICE);
1681
1682 if (scsi_sg_count(SCpnt))
1683 pci_dma_sync_sg_for_cpu(ha->pdev, scsi_sglist(SCpnt),
1684 scsi_sg_count(SCpnt), pci_dir);
1685
1686 if (!DEV2H(cpp->data_len))
1687 pci_dir = PCI_DMA_BIDIRECTIONAL;
1688
1689 if (DEV2H(cpp->data_address))
1690 pci_dma_sync_single_for_cpu(ha->pdev,
1691 DEV2H(cpp->data_address),
1692 DEV2H(cpp->data_len), pci_dir);
1693 }
1694
1695 static void scsi_to_dev_dir(unsigned int i, struct hostdata *ha)
1696 {
1697 unsigned int k;
1698
1699 static const unsigned char data_out_cmds[] = {
1700 0x0a, 0x2a, 0x15, 0x55, 0x04, 0x07, 0x18, 0x1d, 0x24, 0x2e,
1701 0x30, 0x31, 0x32, 0x38, 0x39, 0x3a, 0x3b, 0x3d, 0x3f, 0x40,
1702 0x41, 0x4c, 0xaa, 0xae, 0xb0, 0xb1, 0xb2, 0xb6, 0xea, 0x1b, 0x5d
1703 };
1704
1705 static const unsigned char data_none_cmds[] = {
1706 0x01, 0x0b, 0x10, 0x11, 0x13, 0x16, 0x17, 0x19, 0x2b, 0x1e,
1707 0x2c, 0xac, 0x2f, 0xaf, 0x33, 0xb3, 0x35, 0x36, 0x45, 0x47,
1708 0x48, 0x49, 0xa9, 0x4b, 0xa5, 0xa6, 0xb5, 0x00
1709 };
1710
1711 struct mscp *cpp;
1712 struct scsi_cmnd *SCpnt;
1713
1714 cpp = &ha->cp[i];
1715 SCpnt = cpp->SCpnt;
1716
1717 if (SCpnt->sc_data_direction == DMA_FROM_DEVICE) {
1718 cpp->din = 1;
1719 cpp->dout = 0;
1720 return;
1721 } else if (SCpnt->sc_data_direction == DMA_TO_DEVICE) {
1722 cpp->din = 0;
1723 cpp->dout = 1;
1724 return;
1725 } else if (SCpnt->sc_data_direction == DMA_NONE) {
1726 cpp->din = 0;
1727 cpp->dout = 0;
1728 return;
1729 }
1730
1731 if (SCpnt->sc_data_direction != DMA_BIDIRECTIONAL)
1732 panic("%s: qcomm, invalid SCpnt->sc_data_direction.\n",
1733 ha->board_name);
1734
1735 for (k = 0; k < ARRAY_SIZE(data_out_cmds); k++)
1736 if (SCpnt->cmnd[0] == data_out_cmds[k]) {
1737 cpp->dout = 1;
1738 break;
1739 }
1740
1741 if ((cpp->din = !cpp->dout))
1742 for (k = 0; k < ARRAY_SIZE(data_none_cmds); k++)
1743 if (SCpnt->cmnd[0] == data_none_cmds[k]) {
1744 cpp->din = 0;
1745 break;
1746 }
1747
1748 }
1749
1750 static int eata2x_queuecommand_lck(struct scsi_cmnd *SCpnt,
1751 void (*done) (struct scsi_cmnd *))
1752 {
1753 struct Scsi_Host *shost = SCpnt->device->host;
1754 struct hostdata *ha = (struct hostdata *)shost->hostdata;
1755 unsigned int i, k;
1756 struct mscp *cpp;
1757
1758 if (SCpnt->host_scribble)
1759 panic("%s: qcomm, SCpnt %p already active.\n",
1760 ha->board_name, SCpnt);
1761
1762 /* i is the mailbox number, look for the first free mailbox
1763 starting from last_cp_used */
1764 i = ha->last_cp_used + 1;
1765
1766 for (k = 0; k < shost->can_queue; k++, i++) {
1767 if (i >= shost->can_queue)
1768 i = 0;
1769 if (ha->cp_stat[i] == FREE) {
1770 ha->last_cp_used = i;
1771 break;
1772 }
1773 }
1774
1775 if (k == shost->can_queue) {
1776 printk("%s: qcomm, no free mailbox.\n", ha->board_name);
1777 return 1;
1778 }
1779
1780 /* Set pointer to control packet structure */
1781 cpp = &ha->cp[i];
1782
1783 memset(cpp, 0, sizeof(struct mscp) - CP_TAIL_SIZE);
1784
1785 /* Set pointer to status packet structure, Big Endian format */
1786 cpp->sp_dma_addr = H2DEV(ha->sp_dma_addr);
1787
1788 SCpnt->scsi_done = done;
1789 cpp->cpp_index = i;
1790 SCpnt->host_scribble = (unsigned char *)&cpp->cpp_index;
1791
1792 if (do_trace)
1793 scmd_printk(KERN_INFO, SCpnt,
1794 "qcomm, mbox %d.\n", i);
1795
1796 cpp->reqsen = 1;
1797 cpp->dispri = 1;
1798 #if 0
1799 if (SCpnt->device->type == TYPE_TAPE)
1800 cpp->hbaci = 1;
1801 #endif
1802 cpp->one = 1;
1803 cpp->channel = SCpnt->device->channel;
1804 cpp->target = SCpnt->device->id;
1805 cpp->lun = SCpnt->device->lun;
1806 cpp->SCpnt = SCpnt;
1807 memcpy(cpp->cdb, SCpnt->cmnd, SCpnt->cmd_len);
1808
1809 /* Use data transfer direction SCpnt->sc_data_direction */
1810 scsi_to_dev_dir(i, ha);
1811
1812 /* Map DMA buffers and SG list */
1813 map_dma(i, ha);
1814
1815 if (linked_comm && SCpnt->device->queue_depth > 2
1816 && TLDEV(SCpnt->device->type)) {
1817 ha->cp_stat[i] = READY;
1818 flush_dev(SCpnt->device, blk_rq_pos(SCpnt->request), ha, 0);
1819 return 0;
1820 }
1821
1822 /* Send control packet to the board */
1823 if (do_dma(shost->io_port, cpp->cp_dma_addr, SEND_CP_DMA)) {
1824 unmap_dma(i, ha);
1825 SCpnt->host_scribble = NULL;
1826 scmd_printk(KERN_INFO, SCpnt, "qcomm, adapter busy.\n");
1827 return 1;
1828 }
1829
1830 ha->cp_stat[i] = IN_USE;
1831 return 0;
1832 }
1833
1834 static DEF_SCSI_QCMD(eata2x_queuecommand)
1835
1836 static int eata2x_eh_abort(struct scsi_cmnd *SCarg)
1837 {
1838 struct Scsi_Host *shost = SCarg->device->host;
1839 struct hostdata *ha = (struct hostdata *)shost->hostdata;
1840 unsigned int i;
1841
1842 if (SCarg->host_scribble == NULL) {
1843 scmd_printk(KERN_INFO, SCarg, "abort, cmd inactive.\n");
1844 return SUCCESS;
1845 }
1846
1847 i = *(unsigned int *)SCarg->host_scribble;
1848 scmd_printk(KERN_WARNING, SCarg, "abort, mbox %d.\n", i);
1849
1850 if (i >= shost->can_queue)
1851 panic("%s: abort, invalid SCarg->host_scribble.\n", ha->board_name);
1852
1853 if (wait_on_busy(shost->io_port, MAXLOOP)) {
1854 printk("%s: abort, timeout error.\n", ha->board_name);
1855 return FAILED;
1856 }
1857
1858 if (ha->cp_stat[i] == FREE) {
1859 printk("%s: abort, mbox %d is free.\n", ha->board_name, i);
1860 return SUCCESS;
1861 }
1862
1863 if (ha->cp_stat[i] == IN_USE) {
1864 printk("%s: abort, mbox %d is in use.\n", ha->board_name, i);
1865
1866 if (SCarg != ha->cp[i].SCpnt)
1867 panic("%s: abort, mbox %d, SCarg %p, cp SCpnt %p.\n",
1868 ha->board_name, i, SCarg, ha->cp[i].SCpnt);
1869
1870 if (inb(shost->io_port + REG_AUX_STATUS) & IRQ_ASSERTED)
1871 printk("%s: abort, mbox %d, interrupt pending.\n",
1872 ha->board_name, i);
1873
1874 return FAILED;
1875 }
1876
1877 if (ha->cp_stat[i] == IN_RESET) {
1878 printk("%s: abort, mbox %d is in reset.\n", ha->board_name, i);
1879 return FAILED;
1880 }
1881
1882 if (ha->cp_stat[i] == LOCKED) {
1883 printk("%s: abort, mbox %d is locked.\n", ha->board_name, i);
1884 return SUCCESS;
1885 }
1886
1887 if (ha->cp_stat[i] == READY || ha->cp_stat[i] == ABORTING) {
1888 unmap_dma(i, ha);
1889 SCarg->result = DID_ABORT << 16;
1890 SCarg->host_scribble = NULL;
1891 ha->cp_stat[i] = FREE;
1892 printk("%s, abort, mbox %d ready, DID_ABORT, done.\n",
1893 ha->board_name, i);
1894 SCarg->scsi_done(SCarg);
1895 return SUCCESS;
1896 }
1897
1898 panic("%s: abort, mbox %d, invalid cp_stat.\n", ha->board_name, i);
1899 }
1900
1901 static int eata2x_eh_host_reset(struct scsi_cmnd *SCarg)
1902 {
1903 unsigned int i, time, k, c, limit = 0;
1904 int arg_done = 0;
1905 struct scsi_cmnd *SCpnt;
1906 struct Scsi_Host *shost = SCarg->device->host;
1907 struct hostdata *ha = (struct hostdata *)shost->hostdata;
1908
1909 scmd_printk(KERN_INFO, SCarg, "reset, enter.\n");
1910
1911 spin_lock_irq(shost->host_lock);
1912
1913 if (SCarg->host_scribble == NULL)
1914 printk("%s: reset, inactive.\n", ha->board_name);
1915
1916 if (ha->in_reset) {
1917 printk("%s: reset, exit, already in reset.\n", ha->board_name);
1918 spin_unlock_irq(shost->host_lock);
1919 return FAILED;
1920 }
1921
1922 if (wait_on_busy(shost->io_port, MAXLOOP)) {
1923 printk("%s: reset, exit, timeout error.\n", ha->board_name);
1924 spin_unlock_irq(shost->host_lock);
1925 return FAILED;
1926 }
1927
1928 ha->retries = 0;
1929
1930 for (c = 0; c <= shost->max_channel; c++)
1931 for (k = 0; k < shost->max_id; k++) {
1932 ha->target_redo[k][c] = 1;
1933 ha->target_to[k][c] = 0;
1934 }
1935
1936 for (i = 0; i < shost->can_queue; i++) {
1937
1938 if (ha->cp_stat[i] == FREE)
1939 continue;
1940
1941 if (ha->cp_stat[i] == LOCKED) {
1942 ha->cp_stat[i] = FREE;
1943 printk("%s: reset, locked mbox %d forced free.\n",
1944 ha->board_name, i);
1945 continue;
1946 }
1947
1948 if (!(SCpnt = ha->cp[i].SCpnt))
1949 panic("%s: reset, mbox %d, SCpnt == NULL.\n", ha->board_name, i);
1950
1951 if (ha->cp_stat[i] == READY || ha->cp_stat[i] == ABORTING) {
1952 ha->cp_stat[i] = ABORTING;
1953 printk("%s: reset, mbox %d aborting.\n",
1954 ha->board_name, i);
1955 }
1956
1957 else {
1958 ha->cp_stat[i] = IN_RESET;
1959 printk("%s: reset, mbox %d in reset.\n",
1960 ha->board_name, i);
1961 }
1962
1963 if (SCpnt->host_scribble == NULL)
1964 panic("%s: reset, mbox %d, garbled SCpnt.\n", ha->board_name, i);
1965
1966 if (*(unsigned int *)SCpnt->host_scribble != i)
1967 panic("%s: reset, mbox %d, index mismatch.\n", ha->board_name, i);
1968
1969 if (SCpnt->scsi_done == NULL)
1970 panic("%s: reset, mbox %d, SCpnt->scsi_done == NULL.\n",
1971 ha->board_name, i);
1972
1973 if (SCpnt == SCarg)
1974 arg_done = 1;
1975 }
1976
1977 if (do_dma(shost->io_port, 0, RESET_PIO)) {
1978 printk("%s: reset, cannot reset, timeout error.\n", ha->board_name);
1979 spin_unlock_irq(shost->host_lock);
1980 return FAILED;
1981 }
1982
1983 printk("%s: reset, board reset done, enabling interrupts.\n", ha->board_name);
1984
1985 #if defined(DEBUG_RESET)
1986 do_trace = 1;
1987 #endif
1988
1989 ha->in_reset = 1;
1990
1991 spin_unlock_irq(shost->host_lock);
1992
1993 /* FIXME: use a sleep instead */
1994 time = jiffies;
1995 while ((jiffies - time) < (10 * HZ) && limit++ < 200000)
1996 udelay(100L);
1997
1998 spin_lock_irq(shost->host_lock);
1999
2000 printk("%s: reset, interrupts disabled, loops %d.\n", ha->board_name, limit);
2001
2002 for (i = 0; i < shost->can_queue; i++) {
2003
2004 if (ha->cp_stat[i] == IN_RESET) {
2005 SCpnt = ha->cp[i].SCpnt;
2006 unmap_dma(i, ha);
2007 SCpnt->result = DID_RESET << 16;
2008 SCpnt->host_scribble = NULL;
2009
2010 /* This mailbox is still waiting for its interrupt */
2011 ha->cp_stat[i] = LOCKED;
2012
2013 printk
2014 ("%s, reset, mbox %d locked, DID_RESET, done.\n",
2015 ha->board_name, i);
2016 }
2017
2018 else if (ha->cp_stat[i] == ABORTING) {
2019 SCpnt = ha->cp[i].SCpnt;
2020 unmap_dma(i, ha);
2021 SCpnt->result = DID_RESET << 16;
2022 SCpnt->host_scribble = NULL;
2023
2024 /* This mailbox was never queued to the adapter */
2025 ha->cp_stat[i] = FREE;
2026
2027 printk
2028 ("%s, reset, mbox %d aborting, DID_RESET, done.\n",
2029 ha->board_name, i);
2030 }
2031
2032 else
2033 /* Any other mailbox has already been set free by interrupt */
2034 continue;
2035
2036 SCpnt->scsi_done(SCpnt);
2037 }
2038
2039 ha->in_reset = 0;
2040 do_trace = 0;
2041
2042 if (arg_done)
2043 printk("%s: reset, exit, done.\n", ha->board_name);
2044 else
2045 printk("%s: reset, exit.\n", ha->board_name);
2046
2047 spin_unlock_irq(shost->host_lock);
2048 return SUCCESS;
2049 }
2050
2051 int eata2x_bios_param(struct scsi_device *sdev, struct block_device *bdev,
2052 sector_t capacity, int *dkinfo)
2053 {
2054 unsigned int size = capacity;
2055
2056 if (ext_tran || (scsicam_bios_param(bdev, capacity, dkinfo) < 0)) {
2057 dkinfo[0] = 255;
2058 dkinfo[1] = 63;
2059 dkinfo[2] = size / (dkinfo[0] * dkinfo[1]);
2060 }
2061 #if defined (DEBUG_GEOMETRY)
2062 printk("%s: bios_param, head=%d, sec=%d, cyl=%d.\n", driver_name,
2063 dkinfo[0], dkinfo[1], dkinfo[2]);
2064 #endif
2065
2066 return 0;
2067 }
2068
2069 static void sort(unsigned long sk[], unsigned int da[], unsigned int n,
2070 unsigned int rev)
2071 {
2072 unsigned int i, j, k, y;
2073 unsigned long x;
2074
2075 for (i = 0; i < n - 1; i++) {
2076 k = i;
2077
2078 for (j = k + 1; j < n; j++)
2079 if (rev) {
2080 if (sk[j] > sk[k])
2081 k = j;
2082 } else {
2083 if (sk[j] < sk[k])
2084 k = j;
2085 }
2086
2087 if (k != i) {
2088 x = sk[k];
2089 sk[k] = sk[i];
2090 sk[i] = x;
2091 y = da[k];
2092 da[k] = da[i];
2093 da[i] = y;
2094 }
2095 }
2096
2097 return;
2098 }
2099
2100 static int reorder(struct hostdata *ha, unsigned long cursec,
2101 unsigned int ihdlr, unsigned int il[], unsigned int n_ready)
2102 {
2103 struct scsi_cmnd *SCpnt;
2104 struct mscp *cpp;
2105 unsigned int k, n;
2106 unsigned int rev = 0, s = 1, r = 1;
2107 unsigned int input_only = 1, overlap = 0;
2108 unsigned long sl[n_ready], pl[n_ready], ll[n_ready];
2109 unsigned long maxsec = 0, minsec = ULONG_MAX, seek = 0, iseek = 0;
2110 unsigned long ioseek = 0;
2111
2112 static unsigned int flushcount = 0, batchcount = 0, sortcount = 0;
2113 static unsigned int readycount = 0, ovlcount = 0, inputcount = 0;
2114 static unsigned int readysorted = 0, revcount = 0;
2115 static unsigned long seeksorted = 0, seeknosort = 0;
2116
2117 if (link_statistics && !(++flushcount % link_statistics))
2118 printk("fc %d bc %d ic %d oc %d rc %d rs %d sc %d re %d"
2119 " av %ldK as %ldK.\n", flushcount, batchcount,
2120 inputcount, ovlcount, readycount, readysorted, sortcount,
2121 revcount, seeknosort / (readycount + 1),
2122 seeksorted / (readycount + 1));
2123
2124 if (n_ready <= 1)
2125 return 0;
2126
2127 for (n = 0; n < n_ready; n++) {
2128 k = il[n];
2129 cpp = &ha->cp[k];
2130 SCpnt = cpp->SCpnt;
2131
2132 if (!cpp->din)
2133 input_only = 0;
2134
2135 if (blk_rq_pos(SCpnt->request) < minsec)
2136 minsec = blk_rq_pos(SCpnt->request);
2137 if (blk_rq_pos(SCpnt->request) > maxsec)
2138 maxsec = blk_rq_pos(SCpnt->request);
2139
2140 sl[n] = blk_rq_pos(SCpnt->request);
2141 ioseek += blk_rq_sectors(SCpnt->request);
2142
2143 if (!n)
2144 continue;
2145
2146 if (sl[n] < sl[n - 1])
2147 s = 0;
2148 if (sl[n] > sl[n - 1])
2149 r = 0;
2150
2151 if (link_statistics) {
2152 if (sl[n] > sl[n - 1])
2153 seek += sl[n] - sl[n - 1];
2154 else
2155 seek += sl[n - 1] - sl[n];
2156 }
2157
2158 }
2159
2160 if (link_statistics) {
2161 if (cursec > sl[0])
2162 seek += cursec - sl[0];
2163 else
2164 seek += sl[0] - cursec;
2165 }
2166
2167 if (cursec > ((maxsec + minsec) / 2))
2168 rev = 1;
2169
2170 if (ioseek > ((maxsec - minsec) / 2))
2171 rev = 0;
2172
2173 if (!((rev && r) || (!rev && s)))
2174 sort(sl, il, n_ready, rev);
2175
2176 if (!input_only)
2177 for (n = 0; n < n_ready; n++) {
2178 k = il[n];
2179 cpp = &ha->cp[k];
2180 SCpnt = cpp->SCpnt;
2181 ll[n] = blk_rq_sectors(SCpnt->request);
2182 pl[n] = SCpnt->serial_number;
2183
2184 if (!n)
2185 continue;
2186
2187 if ((sl[n] == sl[n - 1])
2188 || (!rev && ((sl[n - 1] + ll[n - 1]) > sl[n]))
2189 || (rev && ((sl[n] + ll[n]) > sl[n - 1])))
2190 overlap = 1;
2191 }
2192
2193 if (overlap)
2194 sort(pl, il, n_ready, 0);
2195
2196 if (link_statistics) {
2197 if (cursec > sl[0])
2198 iseek = cursec - sl[0];
2199 else
2200 iseek = sl[0] - cursec;
2201 batchcount++;
2202 readycount += n_ready;
2203 seeknosort += seek / 1024;
2204 if (input_only)
2205 inputcount++;
2206 if (overlap) {
2207 ovlcount++;
2208 seeksorted += iseek / 1024;
2209 } else
2210 seeksorted += (iseek + maxsec - minsec) / 1024;
2211 if (rev && !r) {
2212 revcount++;
2213 readysorted += n_ready;
2214 }
2215 if (!rev && !s) {
2216 sortcount++;
2217 readysorted += n_ready;
2218 }
2219 }
2220 #if defined(DEBUG_LINKED_COMMANDS)
2221 if (link_statistics && (overlap || !(flushcount % link_statistics)))
2222 for (n = 0; n < n_ready; n++) {
2223 k = il[n];
2224 cpp = &ha->cp[k];
2225 SCpnt = cpp->SCpnt;
2226 scmd_printk(KERN_INFO, SCpnt,
2227 "%s mb %d fc %d nr %d sec %ld ns %u"
2228 " cur %ld s:%c r:%c rev:%c in:%c ov:%c xd %d.\n",
2229 (ihdlr ? "ihdlr" : "qcomm"),
2230 k, flushcount,
2231 n_ready, blk_rq_pos(SCpnt->request),
2232 blk_rq_sectors(SCpnt->request), cursec, YESNO(s),
2233 YESNO(r), YESNO(rev), YESNO(input_only),
2234 YESNO(overlap), cpp->din);
2235 }
2236 #endif
2237 return overlap;
2238 }
2239
2240 static void flush_dev(struct scsi_device *dev, unsigned long cursec,
2241 struct hostdata *ha, unsigned int ihdlr)
2242 {
2243 struct scsi_cmnd *SCpnt;
2244 struct mscp *cpp;
2245 unsigned int k, n, n_ready = 0, il[MAX_MAILBOXES];
2246
2247 for (k = 0; k < dev->host->can_queue; k++) {
2248
2249 if (ha->cp_stat[k] != READY && ha->cp_stat[k] != IN_USE)
2250 continue;
2251
2252 cpp = &ha->cp[k];
2253 SCpnt = cpp->SCpnt;
2254
2255 if (SCpnt->device != dev)
2256 continue;
2257
2258 if (ha->cp_stat[k] == IN_USE)
2259 return;
2260
2261 il[n_ready++] = k;
2262 }
2263
2264 if (reorder(ha, cursec, ihdlr, il, n_ready))
2265 n_ready = 1;
2266
2267 for (n = 0; n < n_ready; n++) {
2268 k = il[n];
2269 cpp = &ha->cp[k];
2270 SCpnt = cpp->SCpnt;
2271
2272 if (do_dma(dev->host->io_port, cpp->cp_dma_addr, SEND_CP_DMA)) {
2273 scmd_printk(KERN_INFO, SCpnt,
2274 "%s, mbox %d, adapter"
2275 " busy, will abort.\n",
2276 (ihdlr ? "ihdlr" : "qcomm"),
2277 k);
2278 ha->cp_stat[k] = ABORTING;
2279 continue;
2280 }
2281
2282 ha->cp_stat[k] = IN_USE;
2283 }
2284 }
2285
2286 static irqreturn_t ihdlr(struct Scsi_Host *shost)
2287 {
2288 struct scsi_cmnd *SCpnt;
2289 unsigned int i, k, c, status, tstatus, reg;
2290 struct mssp *spp;
2291 struct mscp *cpp;
2292 struct hostdata *ha = (struct hostdata *)shost->hostdata;
2293 int irq = shost->irq;
2294
2295 /* Check if this board need to be serviced */
2296 if (!(inb(shost->io_port + REG_AUX_STATUS) & IRQ_ASSERTED))
2297 goto none;
2298
2299 ha->iocount++;
2300
2301 if (do_trace)
2302 printk("%s: ihdlr, enter, irq %d, count %d.\n", ha->board_name, irq,
2303 ha->iocount);
2304
2305 /* Check if this board is still busy */
2306 if (wait_on_busy(shost->io_port, 20 * MAXLOOP)) {
2307 reg = inb(shost->io_port + REG_STATUS);
2308 printk
2309 ("%s: ihdlr, busy timeout error, irq %d, reg 0x%x, count %d.\n",
2310 ha->board_name, irq, reg, ha->iocount);
2311 goto none;
2312 }
2313
2314 spp = &ha->sp;
2315
2316 /* Make a local copy just before clearing the interrupt indication */
2317 memcpy(spp, ha->sp_cpu_addr, sizeof(struct mssp));
2318
2319 /* Clear the completion flag and cp pointer on the dynamic copy of sp */
2320 memset(ha->sp_cpu_addr, 0, sizeof(struct mssp));
2321
2322 /* Read the status register to clear the interrupt indication */
2323 reg = inb(shost->io_port + REG_STATUS);
2324
2325 #if defined (DEBUG_INTERRUPT)
2326 {
2327 unsigned char *bytesp;
2328 int cnt;
2329 bytesp = (unsigned char *)spp;
2330 if (ha->iocount < 200) {
2331 printk("sp[] =");
2332 for (cnt = 0; cnt < 15; cnt++)
2333 printk(" 0x%x", bytesp[cnt]);
2334 printk("\n");
2335 }
2336 }
2337 #endif
2338
2339 /* Reject any sp with supspect data */
2340 if (spp->eoc == 0 && ha->iocount > 1)
2341 printk
2342 ("%s: ihdlr, spp->eoc == 0, irq %d, reg 0x%x, count %d.\n",
2343 ha->board_name, irq, reg, ha->iocount);
2344 if (spp->cpp_index < 0 || spp->cpp_index >= shost->can_queue)
2345 printk
2346 ("%s: ihdlr, bad spp->cpp_index %d, irq %d, reg 0x%x, count %d.\n",
2347 ha->board_name, spp->cpp_index, irq, reg, ha->iocount);
2348 if (spp->eoc == 0 || spp->cpp_index < 0
2349 || spp->cpp_index >= shost->can_queue)
2350 goto handled;
2351
2352 /* Find the mailbox to be serviced on this board */
2353 i = spp->cpp_index;
2354
2355 cpp = &(ha->cp[i]);
2356
2357 #if defined(DEBUG_GENERATE_ABORTS)
2358 if ((ha->iocount > 500) && ((ha->iocount % 500) < 3))
2359 goto handled;
2360 #endif
2361
2362 if (ha->cp_stat[i] == IGNORE) {
2363 ha->cp_stat[i] = FREE;
2364 goto handled;
2365 } else if (ha->cp_stat[i] == LOCKED) {
2366 ha->cp_stat[i] = FREE;
2367 printk("%s: ihdlr, mbox %d unlocked, count %d.\n", ha->board_name, i,
2368 ha->iocount);
2369 goto handled;
2370 } else if (ha->cp_stat[i] == FREE) {
2371 printk("%s: ihdlr, mbox %d is free, count %d.\n", ha->board_name, i,
2372 ha->iocount);
2373 goto handled;
2374 } else if (ha->cp_stat[i] == IN_RESET)
2375 printk("%s: ihdlr, mbox %d is in reset.\n", ha->board_name, i);
2376 else if (ha->cp_stat[i] != IN_USE)
2377 panic("%s: ihdlr, mbox %d, invalid cp_stat: %d.\n",
2378 ha->board_name, i, ha->cp_stat[i]);
2379
2380 ha->cp_stat[i] = FREE;
2381 SCpnt = cpp->SCpnt;
2382
2383 if (SCpnt == NULL)
2384 panic("%s: ihdlr, mbox %d, SCpnt == NULL.\n", ha->board_name, i);
2385
2386 if (SCpnt->host_scribble == NULL)
2387 panic("%s: ihdlr, mbox %d, SCpnt %p garbled.\n", ha->board_name,
2388 i, SCpnt);
2389
2390 if (*(unsigned int *)SCpnt->host_scribble != i)
2391 panic("%s: ihdlr, mbox %d, index mismatch %d.\n",
2392 ha->board_name, i,
2393 *(unsigned int *)SCpnt->host_scribble);
2394
2395 sync_dma(i, ha);
2396
2397 if (linked_comm && SCpnt->device->queue_depth > 2
2398 && TLDEV(SCpnt->device->type))
2399 flush_dev(SCpnt->device, blk_rq_pos(SCpnt->request), ha, 1);
2400
2401 tstatus = status_byte(spp->target_status);
2402
2403 #if defined(DEBUG_GENERATE_ERRORS)
2404 if ((ha->iocount > 500) && ((ha->iocount % 200) < 2))
2405 spp->adapter_status = 0x01;
2406 #endif
2407
2408 switch (spp->adapter_status) {
2409 case ASOK: /* status OK */
2410
2411 /* Forces a reset if a disk drive keeps returning BUSY */
2412 if (tstatus == BUSY && SCpnt->device->type != TYPE_TAPE)
2413 status = DID_ERROR << 16;
2414
2415 /* If there was a bus reset, redo operation on each target */
2416 else if (tstatus != GOOD && SCpnt->device->type == TYPE_DISK
2417 && ha->target_redo[SCpnt->device->id][SCpnt->
2418 device->
2419 channel])
2420 status = DID_BUS_BUSY << 16;
2421
2422 /* Works around a flaw in scsi.c */
2423 else if (tstatus == CHECK_CONDITION
2424 && SCpnt->device->type == TYPE_DISK
2425 && (SCpnt->sense_buffer[2] & 0xf) == RECOVERED_ERROR)
2426 status = DID_BUS_BUSY << 16;
2427
2428 else
2429 status = DID_OK << 16;
2430
2431 if (tstatus == GOOD)
2432 ha->target_redo[SCpnt->device->id][SCpnt->device->
2433 channel] = 0;
2434
2435 if (spp->target_status && SCpnt->device->type == TYPE_DISK &&
2436 (!(tstatus == CHECK_CONDITION && ha->iocount <= 1000 &&
2437 (SCpnt->sense_buffer[2] & 0xf) == NOT_READY)))
2438 printk("%s: ihdlr, target %d.%d:%d, "
2439 "target_status 0x%x, sense key 0x%x.\n",
2440 ha->board_name,
2441 SCpnt->device->channel, SCpnt->device->id,
2442 (u8)SCpnt->device->lun,
2443 spp->target_status, SCpnt->sense_buffer[2]);
2444
2445 ha->target_to[SCpnt->device->id][SCpnt->device->channel] = 0;
2446
2447 if (ha->last_retried_pid == SCpnt->serial_number)
2448 ha->retries = 0;
2449
2450 break;
2451 case ASST: /* Selection Time Out */
2452 case 0x02: /* Command Time Out */
2453
2454 if (ha->target_to[SCpnt->device->id][SCpnt->device->channel] > 1)
2455 status = DID_ERROR << 16;
2456 else {
2457 status = DID_TIME_OUT << 16;
2458 ha->target_to[SCpnt->device->id][SCpnt->device->
2459 channel]++;
2460 }
2461
2462 break;
2463
2464 /* Perform a limited number of internal retries */
2465 case 0x03: /* SCSI Bus Reset Received */
2466 case 0x04: /* Initial Controller Power-up */
2467
2468 for (c = 0; c <= shost->max_channel; c++)
2469 for (k = 0; k < shost->max_id; k++)
2470 ha->target_redo[k][c] = 1;
2471
2472 if (SCpnt->device->type != TYPE_TAPE
2473 && ha->retries < MAX_INTERNAL_RETRIES) {
2474
2475 #if defined(DID_SOFT_ERROR)
2476 status = DID_SOFT_ERROR << 16;
2477 #else
2478 status = DID_BUS_BUSY << 16;
2479 #endif
2480
2481 ha->retries++;
2482 ha->last_retried_pid = SCpnt->serial_number;
2483 } else
2484 status = DID_ERROR << 16;
2485
2486 break;
2487 case 0x05: /* Unexpected Bus Phase */
2488 case 0x06: /* Unexpected Bus Free */
2489 case 0x07: /* Bus Parity Error */
2490 case 0x08: /* SCSI Hung */
2491 case 0x09: /* Unexpected Message Reject */
2492 case 0x0a: /* SCSI Bus Reset Stuck */
2493 case 0x0b: /* Auto Request-Sense Failed */
2494 case 0x0c: /* Controller Ram Parity Error */
2495 default:
2496 status = DID_ERROR << 16;
2497 break;
2498 }
2499
2500 SCpnt->result = status | spp->target_status;
2501
2502 #if defined(DEBUG_INTERRUPT)
2503 if (SCpnt->result || do_trace)
2504 #else
2505 if ((spp->adapter_status != ASOK && ha->iocount > 1000) ||
2506 (spp->adapter_status != ASOK &&
2507 spp->adapter_status != ASST && ha->iocount <= 1000) ||
2508 do_trace || msg_byte(spp->target_status))
2509 #endif
2510 scmd_printk(KERN_INFO, SCpnt, "ihdlr, mbox %2d, err 0x%x:%x,"
2511 " reg 0x%x, count %d.\n",
2512 i, spp->adapter_status, spp->target_status,
2513 reg, ha->iocount);
2514
2515 unmap_dma(i, ha);
2516
2517 /* Set the command state to inactive */
2518 SCpnt->host_scribble = NULL;
2519
2520 SCpnt->scsi_done(SCpnt);
2521
2522 if (do_trace)
2523 printk("%s: ihdlr, exit, irq %d, count %d.\n", ha->board_name,
2524 irq, ha->iocount);
2525
2526 handled:
2527 return IRQ_HANDLED;
2528 none:
2529 return IRQ_NONE;
2530 }
2531
2532 static irqreturn_t do_interrupt_handler(int dummy, void *shap)
2533 {
2534 struct Scsi_Host *shost;
2535 unsigned int j;
2536 unsigned long spin_flags;
2537 irqreturn_t ret;
2538
2539 /* Check if the interrupt must be processed by this handler */
2540 if ((j = (unsigned int)((char *)shap - sha)) >= num_boards)
2541 return IRQ_NONE;
2542 shost = sh[j];
2543
2544 spin_lock_irqsave(shost->host_lock, spin_flags);
2545 ret = ihdlr(shost);
2546 spin_unlock_irqrestore(shost->host_lock, spin_flags);
2547 return ret;
2548 }
2549
2550 static int eata2x_release(struct Scsi_Host *shost)
2551 {
2552 struct hostdata *ha = (struct hostdata *)shost->hostdata;
2553 unsigned int i;
2554
2555 for (i = 0; i < shost->can_queue; i++)
2556 kfree((&ha->cp[i])->sglist);
2557
2558 for (i = 0; i < shost->can_queue; i++)
2559 pci_unmap_single(ha->pdev, ha->cp[i].cp_dma_addr,
2560 sizeof(struct mscp), PCI_DMA_BIDIRECTIONAL);
2561
2562 if (ha->sp_cpu_addr)
2563 pci_free_consistent(ha->pdev, sizeof(struct mssp),
2564 ha->sp_cpu_addr, ha->sp_dma_addr);
2565
2566 free_irq(shost->irq, &sha[ha->board_number]);
2567
2568 if (shost->dma_channel != NO_DMA)
2569 free_dma(shost->dma_channel);
2570
2571 release_region(shost->io_port, shost->n_io_port);
2572 scsi_unregister(shost);
2573 return 0;
2574 }
2575
2576 #include "scsi_module.c"
2577
2578 #ifndef MODULE
2579 __setup("eata=", option_setup);
2580 #endif /* end MODULE */
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