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Merge branch 'cpus4096-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6/mini2440.git] / drivers / scsi / eata.c
bloba73a6bbb1b2bb37d2426c19987992b4f6f1ef49c
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/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 <asm/byteorder.h>
494 #include <asm/dma.h>
495 #include <asm/io.h>
496 #include <asm/irq.h>
497
498 #include <scsi/scsi.h>
499 #include <scsi/scsi_cmnd.h>
500 #include <scsi/scsi_device.h>
501 #include <scsi/scsi_host.h>
502 #include <scsi/scsi_tcq.h>
503 #include <scsi/scsicam.h>
504
505 static int eata2x_detect(struct scsi_host_template *);
506 static int eata2x_release(struct Scsi_Host *);
507 static int eata2x_queuecommand(struct scsi_cmnd *,
508 void (*done) (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 static DEFINE_SPINLOCK(driver_lock);
841
842 /* Initialize num_boards so that ihdlr can work while detect is in progress */
843 static unsigned int num_boards = MAX_BOARDS;
844
845 static unsigned long io_port[] = {
846
847 /* Space for MAX_INT_PARAM ports usable while loading as a module */
848 SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP,
849 SKIP, SKIP,
850
851 /* First ISA */
852 0x1f0,
853
854 /* Space for MAX_PCI ports possibly reported by PCI_BIOS */
855 SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP,
856 SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP,
857
858 /* MAX_EISA ports */
859 0x1c88, 0x2c88, 0x3c88, 0x4c88, 0x5c88, 0x6c88, 0x7c88, 0x8c88,
860 0x9c88, 0xac88, 0xbc88, 0xcc88, 0xdc88, 0xec88, 0xfc88,
861
862 /* Other (MAX_ISA - 1) ports */
863 0x170, 0x230, 0x330,
864
865 /* End of list */
866 0x0
867 };
868
869 /* Device is Big Endian */
870 #define H2DEV(x) cpu_to_be32(x)
871 #define DEV2H(x) be32_to_cpu(x)
872 #define H2DEV16(x) cpu_to_be16(x)
873 #define DEV2H16(x) be16_to_cpu(x)
874
875 /* But transfer orientation from the 16 bit data register is Little Endian */
876 #define REG2H(x) le16_to_cpu(x)
877
878 static irqreturn_t do_interrupt_handler(int, void *);
879 static void flush_dev(struct scsi_device *, unsigned long, struct hostdata *,
880 unsigned int);
881 static int do_trace = 0;
882 static int setup_done = 0;
883 static int link_statistics;
884 static int ext_tran = 0;
885 static int rev_scan = 1;
886
887 #if defined(CONFIG_SCSI_EATA_TAGGED_QUEUE)
888 static int tag_mode = TAG_SIMPLE;
889 #else
890 static int tag_mode = TAG_DISABLED;
891 #endif
892
893 #if defined(CONFIG_SCSI_EATA_LINKED_COMMANDS)
894 static int linked_comm = 1;
895 #else
896 static int linked_comm = 0;
897 #endif
898
899 #if defined(CONFIG_SCSI_EATA_MAX_TAGS)
900 static int max_queue_depth = CONFIG_SCSI_EATA_MAX_TAGS;
901 #else
902 static int max_queue_depth = MAX_CMD_PER_LUN;
903 #endif
904
905 #if defined(CONFIG_ISA)
906 static int isa_probe = 1;
907 #else
908 static int isa_probe = 0;
909 #endif
910
911 #if defined(CONFIG_EISA)
912 static int eisa_probe = 1;
913 #else
914 static int eisa_probe = 0;
915 #endif
916
917 #if defined(CONFIG_PCI)
918 static int pci_probe = 1;
919 #else
920 static int pci_probe = 0;
921 #endif
922
923 #define MAX_INT_PARAM 10
924 #define MAX_BOOT_OPTIONS_SIZE 256
925 static char boot_options[MAX_BOOT_OPTIONS_SIZE];
926
927 #if defined(MODULE)
928 #include <linux/module.h>
929 #include <linux/moduleparam.h>
930
931 module_param_string(eata, boot_options, MAX_BOOT_OPTIONS_SIZE, 0);
932 MODULE_PARM_DESC(eata, " equivalent to the \"eata=...\" kernel boot option."
933 " Example: modprobe eata \"eata=0x7410,0x230,lc:y,tm:0,mq:4,ep:n\"");
934 MODULE_AUTHOR("Dario Ballabio");
935 MODULE_LICENSE("GPL");
936 MODULE_DESCRIPTION("EATA/DMA SCSI Driver");
937
938 #endif
939
940 static int eata2x_slave_configure(struct scsi_device *dev)
941 {
942 int tqd, utqd;
943 char *tag_suffix, *link_suffix;
944
945 utqd = MAX_CMD_PER_LUN;
946 tqd = max_queue_depth;
947
948 if (TLDEV(dev->type) && dev->tagged_supported) {
949 if (tag_mode == TAG_SIMPLE) {
950 scsi_adjust_queue_depth(dev, MSG_SIMPLE_TAG, tqd);
951 tag_suffix = ", simple tags";
952 } else if (tag_mode == TAG_ORDERED) {
953 scsi_adjust_queue_depth(dev, MSG_ORDERED_TAG, tqd);
954 tag_suffix = ", ordered tags";
955 } else {
956 scsi_adjust_queue_depth(dev, 0, tqd);
957 tag_suffix = ", no tags";
958 }
959 } else if (TLDEV(dev->type) && linked_comm) {
960 scsi_adjust_queue_depth(dev, 0, tqd);
961 tag_suffix = ", untagged";
962 } else {
963 scsi_adjust_queue_depth(dev, 0, utqd);
964 tag_suffix = "";
965 }
966
967 if (TLDEV(dev->type) && linked_comm && dev->queue_depth > 2)
968 link_suffix = ", sorted";
969 else if (TLDEV(dev->type))
970 link_suffix = ", unsorted";
971 else
972 link_suffix = "";
973
974 sdev_printk(KERN_INFO, dev,
975 "cmds/lun %d%s%s.\n",
976 dev->queue_depth, link_suffix, tag_suffix);
977
978 return 0;
979 }
980
981 static int wait_on_busy(unsigned long iobase, unsigned int loop)
982 {
983 while (inb(iobase + REG_AUX_STATUS) & ABSY_ASSERTED) {
984 udelay(1L);
985 if (--loop == 0)
986 return 1;
987 }
988 return 0;
989 }
990
991 static int do_dma(unsigned long iobase, unsigned long addr, unchar cmd)
992 {
993 unsigned char *byaddr;
994 unsigned long devaddr;
995
996 if (wait_on_busy(iobase, (addr ? MAXLOOP * 100 : MAXLOOP)))
997 return 1;
998
999 if (addr) {
1000 devaddr = H2DEV(addr);
1001 byaddr = (unsigned char *)&devaddr;
1002 outb(byaddr[3], iobase + REG_LOW);
1003 outb(byaddr[2], iobase + REG_LM);
1004 outb(byaddr[1], iobase + REG_MID);
1005 outb(byaddr[0], iobase + REG_MSB);
1006 }
1007
1008 outb(cmd, iobase + REG_CMD);
1009 return 0;
1010 }
1011
1012 static int read_pio(unsigned long iobase, ushort * start, ushort * end)
1013 {
1014 unsigned int loop = MAXLOOP;
1015 ushort *p;
1016
1017 for (p = start; p <= end; p++) {
1018 while (!(inb(iobase + REG_STATUS) & DRQ_ASSERTED)) {
1019 udelay(1L);
1020 if (--loop == 0)
1021 return 1;
1022 }
1023 loop = MAXLOOP;
1024 *p = REG2H(inw(iobase));
1025 }
1026
1027 return 0;
1028 }
1029
1030 static struct pci_dev *get_pci_dev(unsigned long port_base)
1031 {
1032 #if defined(CONFIG_PCI)
1033 unsigned int addr;
1034 struct pci_dev *dev = NULL;
1035
1036 while ((dev = pci_get_class(PCI_CLASS_STORAGE_SCSI << 8, dev))) {
1037 addr = pci_resource_start(dev, 0);
1038
1039 #if defined(DEBUG_PCI_DETECT)
1040 printk("%s: get_pci_dev, bus %d, devfn 0x%x, addr 0x%x.\n",
1041 driver_name, dev->bus->number, dev->devfn, addr);
1042 #endif
1043
1044 /* we are in so much trouble for a pci hotplug system with this driver
1045 * anyway, so doing this at least lets people unload the driver and not
1046 * cause memory problems, but in general this is a bad thing to do (this
1047 * driver needs to be converted to the proper PCI api someday... */
1048 pci_dev_put(dev);
1049 if (addr + PCI_BASE_ADDRESS_0 == port_base)
1050 return dev;
1051 }
1052 #endif /* end CONFIG_PCI */
1053 return NULL;
1054 }
1055
1056 static void enable_pci_ports(void)
1057 {
1058 #if defined(CONFIG_PCI)
1059 struct pci_dev *dev = NULL;
1060
1061 while ((dev = pci_get_class(PCI_CLASS_STORAGE_SCSI << 8, dev))) {
1062 #if defined(DEBUG_PCI_DETECT)
1063 printk("%s: enable_pci_ports, bus %d, devfn 0x%x.\n",
1064 driver_name, dev->bus->number, dev->devfn);
1065 #endif
1066
1067 if (pci_enable_device(dev))
1068 printk
1069 ("%s: warning, pci_enable_device failed, bus %d devfn 0x%x.\n",
1070 driver_name, dev->bus->number, dev->devfn);
1071 }
1072
1073 #endif /* end CONFIG_PCI */
1074 }
1075
1076 static int port_detect(unsigned long port_base, unsigned int j,
1077 struct scsi_host_template *tpnt)
1078 {
1079 unsigned char irq, dma_channel, subversion, i, is_pci = 0;
1080 unsigned char protocol_rev;
1081 struct eata_info info;
1082 char *bus_type, dma_name[16];
1083 struct pci_dev *pdev;
1084 /* Allowed DMA channels for ISA (0 indicates reserved) */
1085 unsigned char dma_channel_table[4] = { 5, 6, 7, 0 };
1086 struct Scsi_Host *shost;
1087 struct hostdata *ha;
1088 char name[16];
1089
1090 sprintf(name, "%s%d", driver_name, j);
1091
1092 if (!request_region(port_base, REGION_SIZE, driver_name)) {
1093 #if defined(DEBUG_DETECT)
1094 printk("%s: address 0x%03lx in use, skipping probe.\n", name,
1095 port_base);
1096 #endif
1097 goto fail;
1098 }
1099
1100 spin_lock_irq(&driver_lock);
1101
1102 if (do_dma(port_base, 0, READ_CONFIG_PIO)) {
1103 #if defined(DEBUG_DETECT)
1104 printk("%s: detect, do_dma failed at 0x%03lx.\n", name,
1105 port_base);
1106 #endif
1107 goto freelock;
1108 }
1109
1110 /* Read the info structure */
1111 if (read_pio(port_base, (ushort *) & info, (ushort *) & info.ipad[0])) {
1112 #if defined(DEBUG_DETECT)
1113 printk("%s: detect, read_pio failed at 0x%03lx.\n", name,
1114 port_base);
1115 #endif
1116 goto freelock;
1117 }
1118
1119 info.data_len = DEV2H(info.data_len);
1120 info.sign = DEV2H(info.sign);
1121 info.cp_pad_len = DEV2H16(info.cp_pad_len);
1122 info.cp_len = DEV2H(info.cp_len);
1123 info.sp_len = DEV2H(info.sp_len);
1124 info.scatt_size = DEV2H16(info.scatt_size);
1125 info.queue_size = DEV2H16(info.queue_size);
1126
1127 /* Check the controller "EATA" signature */
1128 if (info.sign != EATA_SIG_BE) {
1129 #if defined(DEBUG_DETECT)
1130 printk("%s: signature 0x%04x discarded.\n", name, info.sign);
1131 #endif
1132 goto freelock;
1133 }
1134
1135 if (info.data_len < EATA_2_0A_SIZE) {
1136 printk
1137 ("%s: config structure size (%d bytes) too short, detaching.\n",
1138 name, info.data_len);
1139 goto freelock;
1140 } else if (info.data_len == EATA_2_0A_SIZE)
1141 protocol_rev = 'A';
1142 else if (info.data_len == EATA_2_0B_SIZE)
1143 protocol_rev = 'B';
1144 else
1145 protocol_rev = 'C';
1146
1147 if (protocol_rev != 'A' && info.forcaddr) {
1148 printk("%s: warning, port address has been forced.\n", name);
1149 bus_type = "PCI";
1150 is_pci = 1;
1151 subversion = ESA;
1152 } else if (port_base > MAX_EISA_ADDR
1153 || (protocol_rev == 'C' && info.pci)) {
1154 bus_type = "PCI";
1155 is_pci = 1;
1156 subversion = ESA;
1157 } else if (port_base >= MIN_EISA_ADDR
1158 || (protocol_rev == 'C' && info.eisa)) {
1159 bus_type = "EISA";
1160 subversion = ESA;
1161 } else if (protocol_rev == 'C' && !info.eisa && !info.pci) {
1162 bus_type = "ISA";
1163 subversion = ISA;
1164 } else if (port_base > MAX_ISA_ADDR) {
1165 bus_type = "PCI";
1166 is_pci = 1;
1167 subversion = ESA;
1168 } else {
1169 bus_type = "ISA";
1170 subversion = ISA;
1171 }
1172
1173 if (!info.haaval || info.ata) {
1174 printk
1175 ("%s: address 0x%03lx, unusable %s board (%d%d), detaching.\n",
1176 name, port_base, bus_type, info.haaval, info.ata);
1177 goto freelock;
1178 }
1179
1180 if (info.drqvld) {
1181 if (subversion == ESA)
1182 printk("%s: warning, weird %s board using DMA.\n", name,
1183 bus_type);
1184
1185 subversion = ISA;
1186 dma_channel = dma_channel_table[3 - info.drqx];
1187 } else {
1188 if (subversion == ISA)
1189 printk("%s: warning, weird %s board not using DMA.\n",
1190 name, bus_type);
1191
1192 subversion = ESA;
1193 dma_channel = NO_DMA;
1194 }
1195
1196 if (!info.dmasup)
1197 printk("%s: warning, DMA protocol support not asserted.\n",
1198 name);
1199
1200 irq = info.irq;
1201
1202 if (subversion == ESA && !info.irq_tr)
1203 printk
1204 ("%s: warning, LEVEL triggering is suggested for IRQ %u.\n",
1205 name, irq);
1206
1207 if (is_pci) {
1208 pdev = get_pci_dev(port_base);
1209 if (!pdev)
1210 printk
1211 ("%s: warning, failed to get pci_dev structure.\n",
1212 name);
1213 } else
1214 pdev = NULL;
1215
1216 if (pdev && (irq != pdev->irq)) {
1217 printk("%s: IRQ %u mapped to IO-APIC IRQ %u.\n", name, irq,
1218 pdev->irq);
1219 irq = pdev->irq;
1220 }
1221
1222 /* Board detected, allocate its IRQ */
1223 if (request_irq(irq, do_interrupt_handler,
1224 IRQF_DISABLED | ((subversion == ESA) ? IRQF_SHARED : 0),
1225 driver_name, (void *)&sha[j])) {
1226 printk("%s: unable to allocate IRQ %u, detaching.\n", name,
1227 irq);
1228 goto freelock;
1229 }
1230
1231 if (subversion == ISA && request_dma(dma_channel, driver_name)) {
1232 printk("%s: unable to allocate DMA channel %u, detaching.\n",
1233 name, dma_channel);
1234 goto freeirq;
1235 }
1236 #if defined(FORCE_CONFIG)
1237 {
1238 struct eata_config *cf;
1239 dma_addr_t cf_dma_addr;
1240
1241 cf = pci_alloc_consistent(pdev, sizeof(struct eata_config),
1242 &cf_dma_addr);
1243
1244 if (!cf) {
1245 printk
1246 ("%s: config, pci_alloc_consistent failed, detaching.\n",
1247 name);
1248 goto freedma;
1249 }
1250
1251 /* Set board configuration */
1252 memset((char *)cf, 0, sizeof(struct eata_config));
1253 cf->len = (ushort) H2DEV16((ushort) 510);
1254 cf->ocena = 1;
1255
1256 if (do_dma(port_base, cf_dma_addr, SET_CONFIG_DMA)) {
1257 printk
1258 ("%s: busy timeout sending configuration, detaching.\n",
1259 name);
1260 pci_free_consistent(pdev, sizeof(struct eata_config),
1261 cf, cf_dma_addr);
1262 goto freedma;
1263 }
1264
1265 }
1266 #endif
1267
1268 spin_unlock_irq(&driver_lock);
1269 sh[j] = shost = scsi_register(tpnt, sizeof(struct hostdata));
1270 spin_lock_irq(&driver_lock);
1271
1272 if (shost == NULL) {
1273 printk("%s: unable to register host, detaching.\n", name);
1274 goto freedma;
1275 }
1276
1277 shost->io_port = port_base;
1278 shost->unique_id = port_base;
1279 shost->n_io_port = REGION_SIZE;
1280 shost->dma_channel = dma_channel;
1281 shost->irq = irq;
1282 shost->sg_tablesize = (ushort) info.scatt_size;
1283 shost->this_id = (ushort) info.host_addr[3];
1284 shost->can_queue = (ushort) info.queue_size;
1285 shost->cmd_per_lun = MAX_CMD_PER_LUN;
1286
1287 ha = (struct hostdata *)shost->hostdata;
1288
1289 memset(ha, 0, sizeof(struct hostdata));
1290 ha->subversion = subversion;
1291 ha->protocol_rev = protocol_rev;
1292 ha->is_pci = is_pci;
1293 ha->pdev = pdev;
1294 ha->board_number = j;
1295
1296 if (ha->subversion == ESA)
1297 shost->unchecked_isa_dma = 0;
1298 else {
1299 unsigned long flags;
1300 shost->unchecked_isa_dma = 1;
1301
1302 flags = claim_dma_lock();
1303 disable_dma(dma_channel);
1304 clear_dma_ff(dma_channel);
1305 set_dma_mode(dma_channel, DMA_MODE_CASCADE);
1306 enable_dma(dma_channel);
1307 release_dma_lock(flags);
1308
1309 }
1310
1311 strcpy(ha->board_name, name);
1312
1313 /* DPT PM2012 does not allow to detect sg_tablesize correctly */
1314 if (shost->sg_tablesize > MAX_SGLIST || shost->sg_tablesize < 2) {
1315 printk("%s: detect, wrong n. of SG lists %d, fixed.\n",
1316 ha->board_name, shost->sg_tablesize);
1317 shost->sg_tablesize = MAX_SGLIST;
1318 }
1319
1320 /* DPT PM2012 does not allow to detect can_queue correctly */
1321 if (shost->can_queue > MAX_MAILBOXES || shost->can_queue < 2) {
1322 printk("%s: detect, wrong n. of mbox %d, fixed.\n",
1323 ha->board_name, shost->can_queue);
1324 shost->can_queue = MAX_MAILBOXES;
1325 }
1326
1327 if (protocol_rev != 'A') {
1328 if (info.max_chan > 0 && info.max_chan < MAX_CHANNEL)
1329 shost->max_channel = info.max_chan;
1330
1331 if (info.max_id > 7 && info.max_id < MAX_TARGET)
1332 shost->max_id = info.max_id + 1;
1333
1334 if (info.large_sg && shost->sg_tablesize == MAX_SGLIST)
1335 shost->sg_tablesize = MAX_LARGE_SGLIST;
1336 }
1337
1338 if (protocol_rev == 'C') {
1339 if (info.max_lun > 7 && info.max_lun < MAX_LUN)
1340 shost->max_lun = info.max_lun + 1;
1341 }
1342
1343 if (dma_channel == NO_DMA)
1344 sprintf(dma_name, "%s", "BMST");
1345 else
1346 sprintf(dma_name, "DMA %u", dma_channel);
1347
1348 spin_unlock_irq(&driver_lock);
1349
1350 for (i = 0; i < shost->can_queue; i++)
1351 ha->cp[i].cp_dma_addr = pci_map_single(ha->pdev,
1352 &ha->cp[i],
1353 sizeof(struct mscp),
1354 PCI_DMA_BIDIRECTIONAL);
1355
1356 for (i = 0; i < shost->can_queue; i++) {
1357 size_t sz = shost->sg_tablesize *sizeof(struct sg_list);
1358 gfp_t gfp_mask = (shost->unchecked_isa_dma ? GFP_DMA : 0) | GFP_ATOMIC;
1359 ha->cp[i].sglist = kmalloc(sz, gfp_mask);
1360 if (!ha->cp[i].sglist) {
1361 printk
1362 ("%s: kmalloc SGlist failed, mbox %d, detaching.\n",
1363 ha->board_name, i);
1364 goto release;
1365 }
1366 }
1367
1368 if (!(ha->sp_cpu_addr = pci_alloc_consistent(ha->pdev,
1369 sizeof(struct mssp),
1370 &ha->sp_dma_addr))) {
1371 printk("%s: pci_alloc_consistent failed, detaching.\n", ha->board_name);
1372 goto release;
1373 }
1374
1375 if (max_queue_depth > MAX_TAGGED_CMD_PER_LUN)
1376 max_queue_depth = MAX_TAGGED_CMD_PER_LUN;
1377
1378 if (max_queue_depth < MAX_CMD_PER_LUN)
1379 max_queue_depth = MAX_CMD_PER_LUN;
1380
1381 if (tag_mode != TAG_DISABLED && tag_mode != TAG_SIMPLE)
1382 tag_mode = TAG_ORDERED;
1383
1384 if (j == 0) {
1385 printk
1386 ("EATA/DMA 2.0x: Copyright (C) 1994-2003 Dario Ballabio.\n");
1387 printk
1388 ("%s config options -> tm:%d, lc:%c, mq:%d, rs:%c, et:%c, "
1389 "ip:%c, ep:%c, pp:%c.\n", driver_name, tag_mode,
1390 YESNO(linked_comm), max_queue_depth, YESNO(rev_scan),
1391 YESNO(ext_tran), YESNO(isa_probe), YESNO(eisa_probe),
1392 YESNO(pci_probe));
1393 }
1394
1395 printk("%s: 2.0%c, %s 0x%03lx, IRQ %u, %s, SG %d, MB %d.\n",
1396 ha->board_name, ha->protocol_rev, bus_type,
1397 (unsigned long)shost->io_port, shost->irq, dma_name,
1398 shost->sg_tablesize, shost->can_queue);
1399
1400 if (shost->max_id > 8 || shost->max_lun > 8)
1401 printk
1402 ("%s: wide SCSI support enabled, max_id %u, max_lun %u.\n",
1403 ha->board_name, shost->max_id, shost->max_lun);
1404
1405 for (i = 0; i <= shost->max_channel; i++)
1406 printk("%s: SCSI channel %u enabled, host target ID %d.\n",
1407 ha->board_name, i, info.host_addr[3 - i]);
1408
1409 #if defined(DEBUG_DETECT)
1410 printk("%s: Vers. 0x%x, ocs %u, tar %u, trnxfr %u, more %u, SYNC 0x%x, "
1411 "sec. %u, infol %d, cpl %d spl %d.\n", name, info.version,
1412 info.ocsena, info.tarsup, info.trnxfr, info.morsup, info.sync,
1413 info.second, info.data_len, info.cp_len, info.sp_len);
1414
1415 if (protocol_rev == 'B' || protocol_rev == 'C')
1416 printk("%s: isaena %u, forcaddr %u, max_id %u, max_chan %u, "
1417 "large_sg %u, res1 %u.\n", name, info.isaena,
1418 info.forcaddr, info.max_id, info.max_chan, info.large_sg,
1419 info.res1);
1420
1421 if (protocol_rev == 'C')
1422 printk("%s: max_lun %u, m1 %u, idquest %u, pci %u, eisa %u, "
1423 "raidnum %u.\n", name, info.max_lun, info.m1,
1424 info.idquest, info.pci, info.eisa, info.raidnum);
1425 #endif
1426
1427 if (ha->pdev) {
1428 pci_set_master(ha->pdev);
1429 if (pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK))
1430 printk("%s: warning, pci_set_dma_mask failed.\n",
1431 ha->board_name);
1432 }
1433
1434 return 1;
1435
1436 freedma:
1437 if (subversion == ISA)
1438 free_dma(dma_channel);
1439 freeirq:
1440 free_irq(irq, &sha[j]);
1441 freelock:
1442 spin_unlock_irq(&driver_lock);
1443 release_region(port_base, REGION_SIZE);
1444 fail:
1445 return 0;
1446
1447 release:
1448 eata2x_release(shost);
1449 return 0;
1450 }
1451
1452 static void internal_setup(char *str, int *ints)
1453 {
1454 int i, argc = ints[0];
1455 char *cur = str, *pc;
1456
1457 if (argc > 0) {
1458 if (argc > MAX_INT_PARAM)
1459 argc = MAX_INT_PARAM;
1460
1461 for (i = 0; i < argc; i++)
1462 io_port[i] = ints[i + 1];
1463
1464 io_port[i] = 0;
1465 setup_done = 1;
1466 }
1467
1468 while (cur && (pc = strchr(cur, ':'))) {
1469 int val = 0, c = *++pc;
1470
1471 if (c == 'n' || c == 'N')
1472 val = 0;
1473 else if (c == 'y' || c == 'Y')
1474 val = 1;
1475 else
1476 val = (int)simple_strtoul(pc, NULL, 0);
1477
1478 if (!strncmp(cur, "lc:", 3))
1479 linked_comm = val;
1480 else if (!strncmp(cur, "tm:", 3))
1481 tag_mode = val;
1482 else if (!strncmp(cur, "tc:", 3))
1483 tag_mode = val;
1484 else if (!strncmp(cur, "mq:", 3))
1485 max_queue_depth = val;
1486 else if (!strncmp(cur, "ls:", 3))
1487 link_statistics = val;
1488 else if (!strncmp(cur, "et:", 3))
1489 ext_tran = val;
1490 else if (!strncmp(cur, "rs:", 3))
1491 rev_scan = val;
1492 else if (!strncmp(cur, "ip:", 3))
1493 isa_probe = val;
1494 else if (!strncmp(cur, "ep:", 3))
1495 eisa_probe = val;
1496 else if (!strncmp(cur, "pp:", 3))
1497 pci_probe = val;
1498
1499 if ((cur = strchr(cur, ',')))
1500 ++cur;
1501 }
1502
1503 return;
1504 }
1505
1506 static int option_setup(char *str)
1507 {
1508 int ints[MAX_INT_PARAM];
1509 char *cur = str;
1510 int i = 1;
1511
1512 while (cur && isdigit(*cur) && i <= MAX_INT_PARAM) {
1513 ints[i++] = simple_strtoul(cur, NULL, 0);
1514
1515 if ((cur = strchr(cur, ',')) != NULL)
1516 cur++;
1517 }
1518
1519 ints[0] = i - 1;
1520 internal_setup(cur, ints);
1521 return 1;
1522 }
1523
1524 static void add_pci_ports(void)
1525 {
1526 #if defined(CONFIG_PCI)
1527 unsigned int addr, k;
1528 struct pci_dev *dev = NULL;
1529
1530 for (k = 0; k < MAX_PCI; k++) {
1531
1532 if (!(dev = pci_get_class(PCI_CLASS_STORAGE_SCSI << 8, dev)))
1533 break;
1534
1535 if (pci_enable_device(dev)) {
1536 #if defined(DEBUG_PCI_DETECT)
1537 printk
1538 ("%s: detect, bus %d, devfn 0x%x, pci_enable_device failed.\n",
1539 driver_name, dev->bus->number, dev->devfn);
1540 #endif
1541
1542 continue;
1543 }
1544
1545 addr = pci_resource_start(dev, 0);
1546
1547 #if defined(DEBUG_PCI_DETECT)
1548 printk("%s: detect, seq. %d, bus %d, devfn 0x%x, addr 0x%x.\n",
1549 driver_name, k, dev->bus->number, dev->devfn, addr);
1550 #endif
1551
1552 /* Order addresses according to rev_scan value */
1553 io_port[MAX_INT_PARAM + (rev_scan ? (MAX_PCI - k) : (1 + k))] =
1554 addr + PCI_BASE_ADDRESS_0;
1555 }
1556
1557 pci_dev_put(dev);
1558 #endif /* end CONFIG_PCI */
1559 }
1560
1561 static int eata2x_detect(struct scsi_host_template *tpnt)
1562 {
1563 unsigned int j = 0, k;
1564
1565 tpnt->proc_name = "eata2x";
1566
1567 if (strlen(boot_options))
1568 option_setup(boot_options);
1569
1570 #if defined(MODULE)
1571 /* io_port could have been modified when loading as a module */
1572 if (io_port[0] != SKIP) {
1573 setup_done = 1;
1574 io_port[MAX_INT_PARAM] = 0;
1575 }
1576 #endif
1577
1578 for (k = MAX_INT_PARAM; io_port[k]; k++)
1579 if (io_port[k] == SKIP)
1580 continue;
1581 else if (io_port[k] <= MAX_ISA_ADDR) {
1582 if (!isa_probe)
1583 io_port[k] = SKIP;
1584 } else if (io_port[k] >= MIN_EISA_ADDR
1585 && io_port[k] <= MAX_EISA_ADDR) {
1586 if (!eisa_probe)
1587 io_port[k] = SKIP;
1588 }
1589
1590 if (pci_probe) {
1591 if (!setup_done)
1592 add_pci_ports();
1593 else
1594 enable_pci_ports();
1595 }
1596
1597 for (k = 0; io_port[k]; k++) {
1598
1599 if (io_port[k] == SKIP)
1600 continue;
1601
1602 if (j < MAX_BOARDS && port_detect(io_port[k], j, tpnt))
1603 j++;
1604 }
1605
1606 num_boards = j;
1607 return j;
1608 }
1609
1610 static void map_dma(unsigned int i, struct hostdata *ha)
1611 {
1612 unsigned int k, pci_dir;
1613 int count;
1614 struct scatterlist *sg;
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 SCSI_SENSE_BUFFERSIZE, PCI_DMA_FROMDEVICE));
1626
1627 cpp->sense_len = SCSI_SENSE_BUFFERSIZE;
1628
1629 count = scsi_dma_map(SCpnt);
1630 BUG_ON(count < 0);
1631 scsi_for_each_sg(SCpnt, sg, count, k) {
1632 cpp->sglist[k].address = H2DEV(sg_dma_address(sg));
1633 cpp->sglist[k].num_bytes = H2DEV(sg_dma_len(sg));
1634 }
1635
1636 cpp->sg = 1;
1637 cpp->data_address = H2DEV(pci_map_single(ha->pdev, cpp->sglist,
1638 scsi_sg_count(SCpnt) *
1639 sizeof(struct sg_list),
1640 pci_dir));
1641 cpp->data_len = H2DEV((scsi_sg_count(SCpnt) * sizeof(struct sg_list)));
1642 }
1643
1644 static void unmap_dma(unsigned int i, struct hostdata *ha)
1645 {
1646 unsigned int pci_dir;
1647 struct mscp *cpp;
1648 struct scsi_cmnd *SCpnt;
1649
1650 cpp = &ha->cp[i];
1651 SCpnt = cpp->SCpnt;
1652 pci_dir = SCpnt->sc_data_direction;
1653
1654 if (DEV2H(cpp->sense_addr))
1655 pci_unmap_single(ha->pdev, DEV2H(cpp->sense_addr),
1656 DEV2H(cpp->sense_len), PCI_DMA_FROMDEVICE);
1657
1658 scsi_dma_unmap(SCpnt);
1659
1660 if (!DEV2H(cpp->data_len))
1661 pci_dir = PCI_DMA_BIDIRECTIONAL;
1662
1663 if (DEV2H(cpp->data_address))
1664 pci_unmap_single(ha->pdev, DEV2H(cpp->data_address),
1665 DEV2H(cpp->data_len), pci_dir);
1666 }
1667
1668 static void sync_dma(unsigned int i, struct hostdata *ha)
1669 {
1670 unsigned int pci_dir;
1671 struct mscp *cpp;
1672 struct scsi_cmnd *SCpnt;
1673
1674 cpp = &ha->cp[i];
1675 SCpnt = cpp->SCpnt;
1676 pci_dir = SCpnt->sc_data_direction;
1677
1678 if (DEV2H(cpp->sense_addr))
1679 pci_dma_sync_single_for_cpu(ha->pdev, DEV2H(cpp->sense_addr),
1680 DEV2H(cpp->sense_len),
1681 PCI_DMA_FROMDEVICE);
1682
1683 if (scsi_sg_count(SCpnt))
1684 pci_dma_sync_sg_for_cpu(ha->pdev, scsi_sglist(SCpnt),
1685 scsi_sg_count(SCpnt), pci_dir);
1686
1687 if (!DEV2H(cpp->data_len))
1688 pci_dir = PCI_DMA_BIDIRECTIONAL;
1689
1690 if (DEV2H(cpp->data_address))
1691 pci_dma_sync_single_for_cpu(ha->pdev,
1692 DEV2H(cpp->data_address),
1693 DEV2H(cpp->data_len), pci_dir);
1694 }
1695
1696 static void scsi_to_dev_dir(unsigned int i, struct hostdata *ha)
1697 {
1698 unsigned int k;
1699
1700 static const unsigned char data_out_cmds[] = {
1701 0x0a, 0x2a, 0x15, 0x55, 0x04, 0x07, 0x18, 0x1d, 0x24, 0x2e,
1702 0x30, 0x31, 0x32, 0x38, 0x39, 0x3a, 0x3b, 0x3d, 0x3f, 0x40,
1703 0x41, 0x4c, 0xaa, 0xae, 0xb0, 0xb1, 0xb2, 0xb6, 0xea, 0x1b, 0x5d
1704 };
1705
1706 static const unsigned char data_none_cmds[] = {
1707 0x01, 0x0b, 0x10, 0x11, 0x13, 0x16, 0x17, 0x19, 0x2b, 0x1e,
1708 0x2c, 0xac, 0x2f, 0xaf, 0x33, 0xb3, 0x35, 0x36, 0x45, 0x47,
1709 0x48, 0x49, 0xa9, 0x4b, 0xa5, 0xa6, 0xb5, 0x00
1710 };
1711
1712 struct mscp *cpp;
1713 struct scsi_cmnd *SCpnt;
1714
1715 cpp = &ha->cp[i];
1716 SCpnt = cpp->SCpnt;
1717
1718 if (SCpnt->sc_data_direction == DMA_FROM_DEVICE) {
1719 cpp->din = 1;
1720 cpp->dout = 0;
1721 return;
1722 } else if (SCpnt->sc_data_direction == DMA_TO_DEVICE) {
1723 cpp->din = 0;
1724 cpp->dout = 1;
1725 return;
1726 } else if (SCpnt->sc_data_direction == DMA_NONE) {
1727 cpp->din = 0;
1728 cpp->dout = 0;
1729 return;
1730 }
1731
1732 if (SCpnt->sc_data_direction != DMA_BIDIRECTIONAL)
1733 panic("%s: qcomm, invalid SCpnt->sc_data_direction.\n",
1734 ha->board_name);
1735
1736 for (k = 0; k < ARRAY_SIZE(data_out_cmds); k++)
1737 if (SCpnt->cmnd[0] == data_out_cmds[k]) {
1738 cpp->dout = 1;
1739 break;
1740 }
1741
1742 if ((cpp->din = !cpp->dout))
1743 for (k = 0; k < ARRAY_SIZE(data_none_cmds); k++)
1744 if (SCpnt->cmnd[0] == data_none_cmds[k]) {
1745 cpp->din = 0;
1746 break;
1747 }
1748
1749 }
1750
1751 static int eata2x_queuecommand(struct scsi_cmnd *SCpnt,
1752 void (*done) (struct scsi_cmnd *))
1753 {
1754 struct Scsi_Host *shost = SCpnt->device->host;
1755 struct hostdata *ha = (struct hostdata *)shost->hostdata;
1756 unsigned int i, k;
1757 struct mscp *cpp;
1758
1759 if (SCpnt->host_scribble)
1760 panic("%s: qcomm, pid %ld, SCpnt %p already active.\n",
1761 ha->board_name, SCpnt->serial_number, SCpnt);
1762
1763 /* i is the mailbox number, look for the first free mailbox
1764 starting from last_cp_used */
1765 i = ha->last_cp_used + 1;
1766
1767 for (k = 0; k < shost->can_queue; k++, i++) {
1768 if (i >= shost->can_queue)
1769 i = 0;
1770 if (ha->cp_stat[i] == FREE) {
1771 ha->last_cp_used = i;
1772 break;
1773 }
1774 }
1775
1776 if (k == shost->can_queue) {
1777 printk("%s: qcomm, no free mailbox.\n", ha->board_name);
1778 return 1;
1779 }
1780
1781 /* Set pointer to control packet structure */
1782 cpp = &ha->cp[i];
1783
1784 memset(cpp, 0, sizeof(struct mscp) - CP_TAIL_SIZE);
1785
1786 /* Set pointer to status packet structure, Big Endian format */
1787 cpp->sp_dma_addr = H2DEV(ha->sp_dma_addr);
1788
1789 SCpnt->scsi_done = done;
1790 cpp->cpp_index = i;
1791 SCpnt->host_scribble = (unsigned char *)&cpp->cpp_index;
1792
1793 if (do_trace)
1794 scmd_printk(KERN_INFO, SCpnt,
1795 "qcomm, mbox %d, pid %ld.\n", i, SCpnt->serial_number);
1796
1797 cpp->reqsen = 1;
1798 cpp->dispri = 1;
1799 #if 0
1800 if (SCpnt->device->type == TYPE_TAPE)
1801 cpp->hbaci = 1;
1802 #endif
1803 cpp->one = 1;
1804 cpp->channel = SCpnt->device->channel;
1805 cpp->target = SCpnt->device->id;
1806 cpp->lun = SCpnt->device->lun;
1807 cpp->SCpnt = SCpnt;
1808 memcpy(cpp->cdb, SCpnt->cmnd, SCpnt->cmd_len);
1809
1810 /* Use data transfer direction SCpnt->sc_data_direction */
1811 scsi_to_dev_dir(i, ha);
1812
1813 /* Map DMA buffers and SG list */
1814 map_dma(i, ha);
1815
1816 if (linked_comm && SCpnt->device->queue_depth > 2
1817 && TLDEV(SCpnt->device->type)) {
1818 ha->cp_stat[i] = READY;
1819 flush_dev(SCpnt->device, SCpnt->request->sector, ha, 0);
1820 return 0;
1821 }
1822
1823 /* Send control packet to the board */
1824 if (do_dma(shost->io_port, cpp->cp_dma_addr, SEND_CP_DMA)) {
1825 unmap_dma(i, ha);
1826 SCpnt->host_scribble = NULL;
1827 scmd_printk(KERN_INFO, SCpnt,
1828 "qcomm, pid %ld, adapter busy.\n", SCpnt->serial_number);
1829 return 1;
1830 }
1831
1832 ha->cp_stat[i] = IN_USE;
1833 return 0;
1834 }
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,
1844 "abort, pid %ld inactive.\n", SCarg->serial_number);
1845 return SUCCESS;
1846 }
1847
1848 i = *(unsigned int *)SCarg->host_scribble;
1849 scmd_printk(KERN_WARNING, SCarg,
1850 "abort, mbox %d, pid %ld.\n", i, SCarg->serial_number);
1851
1852 if (i >= shost->can_queue)
1853 panic("%s: abort, invalid SCarg->host_scribble.\n", ha->board_name);
1854
1855 if (wait_on_busy(shost->io_port, MAXLOOP)) {
1856 printk("%s: abort, timeout error.\n", ha->board_name);
1857 return FAILED;
1858 }
1859
1860 if (ha->cp_stat[i] == FREE) {
1861 printk("%s: abort, mbox %d is free.\n", ha->board_name, i);
1862 return SUCCESS;
1863 }
1864
1865 if (ha->cp_stat[i] == IN_USE) {
1866 printk("%s: abort, mbox %d is in use.\n", ha->board_name, i);
1867
1868 if (SCarg != ha->cp[i].SCpnt)
1869 panic("%s: abort, mbox %d, SCarg %p, cp SCpnt %p.\n",
1870 ha->board_name, i, SCarg, ha->cp[i].SCpnt);
1871
1872 if (inb(shost->io_port + REG_AUX_STATUS) & IRQ_ASSERTED)
1873 printk("%s: abort, mbox %d, interrupt pending.\n",
1874 ha->board_name, i);
1875
1876 return FAILED;
1877 }
1878
1879 if (ha->cp_stat[i] == IN_RESET) {
1880 printk("%s: abort, mbox %d is in reset.\n", ha->board_name, i);
1881 return FAILED;
1882 }
1883
1884 if (ha->cp_stat[i] == LOCKED) {
1885 printk("%s: abort, mbox %d is locked.\n", ha->board_name, i);
1886 return SUCCESS;
1887 }
1888
1889 if (ha->cp_stat[i] == READY || ha->cp_stat[i] == ABORTING) {
1890 unmap_dma(i, ha);
1891 SCarg->result = DID_ABORT << 16;
1892 SCarg->host_scribble = NULL;
1893 ha->cp_stat[i] = FREE;
1894 printk("%s, abort, mbox %d ready, DID_ABORT, pid %ld done.\n",
1895 ha->board_name, i, SCarg->serial_number);
1896 SCarg->scsi_done(SCarg);
1897 return SUCCESS;
1898 }
1899
1900 panic("%s: abort, mbox %d, invalid cp_stat.\n", ha->board_name, i);
1901 }
1902
1903 static int eata2x_eh_host_reset(struct scsi_cmnd *SCarg)
1904 {
1905 unsigned int i, time, k, c, limit = 0;
1906 int arg_done = 0;
1907 struct scsi_cmnd *SCpnt;
1908 struct Scsi_Host *shost = SCarg->device->host;
1909 struct hostdata *ha = (struct hostdata *)shost->hostdata;
1910
1911 scmd_printk(KERN_INFO, SCarg,
1912 "reset, enter, pid %ld.\n", SCarg->serial_number);
1913
1914 spin_lock_irq(shost->host_lock);
1915
1916 if (SCarg->host_scribble == NULL)
1917 printk("%s: reset, pid %ld inactive.\n", ha->board_name, SCarg->serial_number);
1918
1919 if (ha->in_reset) {
1920 printk("%s: reset, exit, already in reset.\n", ha->board_name);
1921 spin_unlock_irq(shost->host_lock);
1922 return FAILED;
1923 }
1924
1925 if (wait_on_busy(shost->io_port, MAXLOOP)) {
1926 printk("%s: reset, exit, timeout error.\n", ha->board_name);
1927 spin_unlock_irq(shost->host_lock);
1928 return FAILED;
1929 }
1930
1931 ha->retries = 0;
1932
1933 for (c = 0; c <= shost->max_channel; c++)
1934 for (k = 0; k < shost->max_id; k++) {
1935 ha->target_redo[k][c] = 1;
1936 ha->target_to[k][c] = 0;
1937 }
1938
1939 for (i = 0; i < shost->can_queue; i++) {
1940
1941 if (ha->cp_stat[i] == FREE)
1942 continue;
1943
1944 if (ha->cp_stat[i] == LOCKED) {
1945 ha->cp_stat[i] = FREE;
1946 printk("%s: reset, locked mbox %d forced free.\n",
1947 ha->board_name, i);
1948 continue;
1949 }
1950
1951 if (!(SCpnt = ha->cp[i].SCpnt))
1952 panic("%s: reset, mbox %d, SCpnt == NULL.\n", ha->board_name, i);
1953
1954 if (ha->cp_stat[i] == READY || ha->cp_stat[i] == ABORTING) {
1955 ha->cp_stat[i] = ABORTING;
1956 printk("%s: reset, mbox %d aborting, pid %ld.\n",
1957 ha->board_name, i, SCpnt->serial_number);
1958 }
1959
1960 else {
1961 ha->cp_stat[i] = IN_RESET;
1962 printk("%s: reset, mbox %d in reset, pid %ld.\n",
1963 ha->board_name, i, SCpnt->serial_number);
1964 }
1965
1966 if (SCpnt->host_scribble == NULL)
1967 panic("%s: reset, mbox %d, garbled SCpnt.\n", ha->board_name, i);
1968
1969 if (*(unsigned int *)SCpnt->host_scribble != i)
1970 panic("%s: reset, mbox %d, index mismatch.\n", ha->board_name, i);
1971
1972 if (SCpnt->scsi_done == NULL)
1973 panic("%s: reset, mbox %d, SCpnt->scsi_done == NULL.\n",
1974 ha->board_name, i);
1975
1976 if (SCpnt == SCarg)
1977 arg_done = 1;
1978 }
1979
1980 if (do_dma(shost->io_port, 0, RESET_PIO)) {
1981 printk("%s: reset, cannot reset, timeout error.\n", ha->board_name);
1982 spin_unlock_irq(shost->host_lock);
1983 return FAILED;
1984 }
1985
1986 printk("%s: reset, board reset done, enabling interrupts.\n", ha->board_name);
1987
1988 #if defined(DEBUG_RESET)
1989 do_trace = 1;
1990 #endif
1991
1992 ha->in_reset = 1;
1993
1994 spin_unlock_irq(shost->host_lock);
1995
1996 /* FIXME: use a sleep instead */
1997 time = jiffies;
1998 while ((jiffies - time) < (10 * HZ) && limit++ < 200000)
1999 udelay(100L);
2000
2001 spin_lock_irq(shost->host_lock);
2002
2003 printk("%s: reset, interrupts disabled, loops %d.\n", ha->board_name, limit);
2004
2005 for (i = 0; i < shost->can_queue; i++) {
2006
2007 if (ha->cp_stat[i] == IN_RESET) {
2008 SCpnt = ha->cp[i].SCpnt;
2009 unmap_dma(i, ha);
2010 SCpnt->result = DID_RESET << 16;
2011 SCpnt->host_scribble = NULL;
2012
2013 /* This mailbox is still waiting for its interrupt */
2014 ha->cp_stat[i] = LOCKED;
2015
2016 printk
2017 ("%s, reset, mbox %d locked, DID_RESET, pid %ld done.\n",
2018 ha->board_name, i, SCpnt->serial_number);
2019 }
2020
2021 else if (ha->cp_stat[i] == ABORTING) {
2022 SCpnt = ha->cp[i].SCpnt;
2023 unmap_dma(i, ha);
2024 SCpnt->result = DID_RESET << 16;
2025 SCpnt->host_scribble = NULL;
2026
2027 /* This mailbox was never queued to the adapter */
2028 ha->cp_stat[i] = FREE;
2029
2030 printk
2031 ("%s, reset, mbox %d aborting, DID_RESET, pid %ld done.\n",
2032 ha->board_name, i, SCpnt->serial_number);
2033 }
2034
2035 else
2036 /* Any other mailbox has already been set free by interrupt */
2037 continue;
2038
2039 SCpnt->scsi_done(SCpnt);
2040 }
2041
2042 ha->in_reset = 0;
2043 do_trace = 0;
2044
2045 if (arg_done)
2046 printk("%s: reset, exit, pid %ld done.\n", ha->board_name, SCarg->serial_number);
2047 else
2048 printk("%s: reset, exit.\n", ha->board_name);
2049
2050 spin_unlock_irq(shost->host_lock);
2051 return SUCCESS;
2052 }
2053
2054 int eata2x_bios_param(struct scsi_device *sdev, struct block_device *bdev,
2055 sector_t capacity, int *dkinfo)
2056 {
2057 unsigned int size = capacity;
2058
2059 if (ext_tran || (scsicam_bios_param(bdev, capacity, dkinfo) < 0)) {
2060 dkinfo[0] = 255;
2061 dkinfo[1] = 63;
2062 dkinfo[2] = size / (dkinfo[0] * dkinfo[1]);
2063 }
2064 #if defined (DEBUG_GEOMETRY)
2065 printk("%s: bios_param, head=%d, sec=%d, cyl=%d.\n", driver_name,
2066 dkinfo[0], dkinfo[1], dkinfo[2]);
2067 #endif
2068
2069 return 0;
2070 }
2071
2072 static void sort(unsigned long sk[], unsigned int da[], unsigned int n,
2073 unsigned int rev)
2074 {
2075 unsigned int i, j, k, y;
2076 unsigned long x;
2077
2078 for (i = 0; i < n - 1; i++) {
2079 k = i;
2080
2081 for (j = k + 1; j < n; j++)
2082 if (rev) {
2083 if (sk[j] > sk[k])
2084 k = j;
2085 } else {
2086 if (sk[j] < sk[k])
2087 k = j;
2088 }
2089
2090 if (k != i) {
2091 x = sk[k];
2092 sk[k] = sk[i];
2093 sk[i] = x;
2094 y = da[k];
2095 da[k] = da[i];
2096 da[i] = y;
2097 }
2098 }
2099
2100 return;
2101 }
2102
2103 static int reorder(struct hostdata *ha, unsigned long cursec,
2104 unsigned int ihdlr, unsigned int il[], unsigned int n_ready)
2105 {
2106 struct scsi_cmnd *SCpnt;
2107 struct mscp *cpp;
2108 unsigned int k, n;
2109 unsigned int rev = 0, s = 1, r = 1;
2110 unsigned int input_only = 1, overlap = 0;
2111 unsigned long sl[n_ready], pl[n_ready], ll[n_ready];
2112 unsigned long maxsec = 0, minsec = ULONG_MAX, seek = 0, iseek = 0;
2113 unsigned long ioseek = 0;
2114
2115 static unsigned int flushcount = 0, batchcount = 0, sortcount = 0;
2116 static unsigned int readycount = 0, ovlcount = 0, inputcount = 0;
2117 static unsigned int readysorted = 0, revcount = 0;
2118 static unsigned long seeksorted = 0, seeknosort = 0;
2119
2120 if (link_statistics && !(++flushcount % link_statistics))
2121 printk("fc %d bc %d ic %d oc %d rc %d rs %d sc %d re %d"
2122 " av %ldK as %ldK.\n", flushcount, batchcount,
2123 inputcount, ovlcount, readycount, readysorted, sortcount,
2124 revcount, seeknosort / (readycount + 1),
2125 seeksorted / (readycount + 1));
2126
2127 if (n_ready <= 1)
2128 return 0;
2129
2130 for (n = 0; n < n_ready; n++) {
2131 k = il[n];
2132 cpp = &ha->cp[k];
2133 SCpnt = cpp->SCpnt;
2134
2135 if (!cpp->din)
2136 input_only = 0;
2137
2138 if (SCpnt->request->sector < minsec)
2139 minsec = SCpnt->request->sector;
2140 if (SCpnt->request->sector > maxsec)
2141 maxsec = SCpnt->request->sector;
2142
2143 sl[n] = SCpnt->request->sector;
2144 ioseek += SCpnt->request->nr_sectors;
2145
2146 if (!n)
2147 continue;
2148
2149 if (sl[n] < sl[n - 1])
2150 s = 0;
2151 if (sl[n] > sl[n - 1])
2152 r = 0;
2153
2154 if (link_statistics) {
2155 if (sl[n] > sl[n - 1])
2156 seek += sl[n] - sl[n - 1];
2157 else
2158 seek += sl[n - 1] - sl[n];
2159 }
2160
2161 }
2162
2163 if (link_statistics) {
2164 if (cursec > sl[0])
2165 seek += cursec - sl[0];
2166 else
2167 seek += sl[0] - cursec;
2168 }
2169
2170 if (cursec > ((maxsec + minsec) / 2))
2171 rev = 1;
2172
2173 if (ioseek > ((maxsec - minsec) / 2))
2174 rev = 0;
2175
2176 if (!((rev && r) || (!rev && s)))
2177 sort(sl, il, n_ready, rev);
2178
2179 if (!input_only)
2180 for (n = 0; n < n_ready; n++) {
2181 k = il[n];
2182 cpp = &ha->cp[k];
2183 SCpnt = cpp->SCpnt;
2184 ll[n] = SCpnt->request->nr_sectors;
2185 pl[n] = SCpnt->serial_number;
2186
2187 if (!n)
2188 continue;
2189
2190 if ((sl[n] == sl[n - 1])
2191 || (!rev && ((sl[n - 1] + ll[n - 1]) > sl[n]))
2192 || (rev && ((sl[n] + ll[n]) > sl[n - 1])))
2193 overlap = 1;
2194 }
2195
2196 if (overlap)
2197 sort(pl, il, n_ready, 0);
2198
2199 if (link_statistics) {
2200 if (cursec > sl[0])
2201 iseek = cursec - sl[0];
2202 else
2203 iseek = sl[0] - cursec;
2204 batchcount++;
2205 readycount += n_ready;
2206 seeknosort += seek / 1024;
2207 if (input_only)
2208 inputcount++;
2209 if (overlap) {
2210 ovlcount++;
2211 seeksorted += iseek / 1024;
2212 } else
2213 seeksorted += (iseek + maxsec - minsec) / 1024;
2214 if (rev && !r) {
2215 revcount++;
2216 readysorted += n_ready;
2217 }
2218 if (!rev && !s) {
2219 sortcount++;
2220 readysorted += n_ready;
2221 }
2222 }
2223 #if defined(DEBUG_LINKED_COMMANDS)
2224 if (link_statistics && (overlap || !(flushcount % link_statistics)))
2225 for (n = 0; n < n_ready; n++) {
2226 k = il[n];
2227 cpp = &ha->cp[k];
2228 SCpnt = cpp->SCpnt;
2229 scmd_printk(KERN_INFO, SCpnt,
2230 "%s pid %ld mb %d fc %d nr %d sec %ld ns %ld"
2231 " cur %ld s:%c r:%c rev:%c in:%c ov:%c xd %d.\n",
2232 (ihdlr ? "ihdlr" : "qcomm"),
2233 SCpnt->serial_number, k, flushcount,
2234 n_ready, SCpnt->request->sector,
2235 SCpnt->request->nr_sectors, cursec, YESNO(s),
2236 YESNO(r), YESNO(rev), YESNO(input_only),
2237 YESNO(overlap), cpp->din);
2238 }
2239 #endif
2240 return overlap;
2241 }
2242
2243 static void flush_dev(struct scsi_device *dev, unsigned long cursec,
2244 struct hostdata *ha, unsigned int ihdlr)
2245 {
2246 struct scsi_cmnd *SCpnt;
2247 struct mscp *cpp;
2248 unsigned int k, n, n_ready = 0, il[MAX_MAILBOXES];
2249
2250 for (k = 0; k < dev->host->can_queue; k++) {
2251
2252 if (ha->cp_stat[k] != READY && ha->cp_stat[k] != IN_USE)
2253 continue;
2254
2255 cpp = &ha->cp[k];
2256 SCpnt = cpp->SCpnt;
2257
2258 if (SCpnt->device != dev)
2259 continue;
2260
2261 if (ha->cp_stat[k] == IN_USE)
2262 return;
2263
2264 il[n_ready++] = k;
2265 }
2266
2267 if (reorder(ha, cursec, ihdlr, il, n_ready))
2268 n_ready = 1;
2269
2270 for (n = 0; n < n_ready; n++) {
2271 k = il[n];
2272 cpp = &ha->cp[k];
2273 SCpnt = cpp->SCpnt;
2274
2275 if (do_dma(dev->host->io_port, cpp->cp_dma_addr, SEND_CP_DMA)) {
2276 scmd_printk(KERN_INFO, SCpnt,
2277 "%s, pid %ld, mbox %d, adapter"
2278 " busy, will abort.\n",
2279 (ihdlr ? "ihdlr" : "qcomm"),
2280 SCpnt->serial_number, k);
2281 ha->cp_stat[k] = ABORTING;
2282 continue;
2283 }
2284
2285 ha->cp_stat[k] = IN_USE;
2286 }
2287 }
2288
2289 static irqreturn_t ihdlr(struct Scsi_Host *shost)
2290 {
2291 struct scsi_cmnd *SCpnt;
2292 unsigned int i, k, c, status, tstatus, reg;
2293 struct mssp *spp;
2294 struct mscp *cpp;
2295 struct hostdata *ha = (struct hostdata *)shost->hostdata;
2296 int irq = shost->irq;
2297
2298 /* Check if this board need to be serviced */
2299 if (!(inb(shost->io_port + REG_AUX_STATUS) & IRQ_ASSERTED))
2300 goto none;
2301
2302 ha->iocount++;
2303
2304 if (do_trace)
2305 printk("%s: ihdlr, enter, irq %d, count %d.\n", ha->board_name, irq,
2306 ha->iocount);
2307
2308 /* Check if this board is still busy */
2309 if (wait_on_busy(shost->io_port, 20 * MAXLOOP)) {
2310 reg = inb(shost->io_port + REG_STATUS);
2311 printk
2312 ("%s: ihdlr, busy timeout error, irq %d, reg 0x%x, count %d.\n",
2313 ha->board_name, irq, reg, ha->iocount);
2314 goto none;
2315 }
2316
2317 spp = &ha->sp;
2318
2319 /* Make a local copy just before clearing the interrupt indication */
2320 memcpy(spp, ha->sp_cpu_addr, sizeof(struct mssp));
2321
2322 /* Clear the completion flag and cp pointer on the dynamic copy of sp */
2323 memset(ha->sp_cpu_addr, 0, sizeof(struct mssp));
2324
2325 /* Read the status register to clear the interrupt indication */
2326 reg = inb(shost->io_port + REG_STATUS);
2327
2328 #if defined (DEBUG_INTERRUPT)
2329 {
2330 unsigned char *bytesp;
2331 int cnt;
2332 bytesp = (unsigned char *)spp;
2333 if (ha->iocount < 200) {
2334 printk("sp[] =");
2335 for (cnt = 0; cnt < 15; cnt++)
2336 printk(" 0x%x", bytesp[cnt]);
2337 printk("\n");
2338 }
2339 }
2340 #endif
2341
2342 /* Reject any sp with supspect data */
2343 if (spp->eoc == 0 && ha->iocount > 1)
2344 printk
2345 ("%s: ihdlr, spp->eoc == 0, irq %d, reg 0x%x, count %d.\n",
2346 ha->board_name, irq, reg, ha->iocount);
2347 if (spp->cpp_index < 0 || spp->cpp_index >= shost->can_queue)
2348 printk
2349 ("%s: ihdlr, bad spp->cpp_index %d, irq %d, reg 0x%x, count %d.\n",
2350 ha->board_name, spp->cpp_index, irq, reg, ha->iocount);
2351 if (spp->eoc == 0 || spp->cpp_index < 0
2352 || spp->cpp_index >= shost->can_queue)
2353 goto handled;
2354
2355 /* Find the mailbox to be serviced on this board */
2356 i = spp->cpp_index;
2357
2358 cpp = &(ha->cp[i]);
2359
2360 #if defined(DEBUG_GENERATE_ABORTS)
2361 if ((ha->iocount > 500) && ((ha->iocount % 500) < 3))
2362 goto handled;
2363 #endif
2364
2365 if (ha->cp_stat[i] == IGNORE) {
2366 ha->cp_stat[i] = FREE;
2367 goto handled;
2368 } else if (ha->cp_stat[i] == LOCKED) {
2369 ha->cp_stat[i] = FREE;
2370 printk("%s: ihdlr, mbox %d unlocked, count %d.\n", ha->board_name, i,
2371 ha->iocount);
2372 goto handled;
2373 } else if (ha->cp_stat[i] == FREE) {
2374 printk("%s: ihdlr, mbox %d is free, count %d.\n", ha->board_name, i,
2375 ha->iocount);
2376 goto handled;
2377 } else if (ha->cp_stat[i] == IN_RESET)
2378 printk("%s: ihdlr, mbox %d is in reset.\n", ha->board_name, i);
2379 else if (ha->cp_stat[i] != IN_USE)
2380 panic("%s: ihdlr, mbox %d, invalid cp_stat: %d.\n",
2381 ha->board_name, i, ha->cp_stat[i]);
2382
2383 ha->cp_stat[i] = FREE;
2384 SCpnt = cpp->SCpnt;
2385
2386 if (SCpnt == NULL)
2387 panic("%s: ihdlr, mbox %d, SCpnt == NULL.\n", ha->board_name, i);
2388
2389 if (SCpnt->host_scribble == NULL)
2390 panic("%s: ihdlr, mbox %d, pid %ld, SCpnt %p garbled.\n", ha->board_name,
2391 i, SCpnt->serial_number, SCpnt);
2392
2393 if (*(unsigned int *)SCpnt->host_scribble != i)
2394 panic("%s: ihdlr, mbox %d, pid %ld, index mismatch %d.\n",
2395 ha->board_name, i, SCpnt->serial_number,
2396 *(unsigned int *)SCpnt->host_scribble);
2397
2398 sync_dma(i, ha);
2399
2400 if (linked_comm && SCpnt->device->queue_depth > 2
2401 && TLDEV(SCpnt->device->type))
2402 flush_dev(SCpnt->device, SCpnt->request->sector, ha, 1);
2403
2404 tstatus = status_byte(spp->target_status);
2405
2406 #if defined(DEBUG_GENERATE_ERRORS)
2407 if ((ha->iocount > 500) && ((ha->iocount % 200) < 2))
2408 spp->adapter_status = 0x01;
2409 #endif
2410
2411 switch (spp->adapter_status) {
2412 case ASOK: /* status OK */
2413
2414 /* Forces a reset if a disk drive keeps returning BUSY */
2415 if (tstatus == BUSY && SCpnt->device->type != TYPE_TAPE)
2416 status = DID_ERROR << 16;
2417
2418 /* If there was a bus reset, redo operation on each target */
2419 else if (tstatus != GOOD && SCpnt->device->type == TYPE_DISK
2420 && ha->target_redo[SCpnt->device->id][SCpnt->
2421 device->
2422 channel])
2423 status = DID_BUS_BUSY << 16;
2424
2425 /* Works around a flaw in scsi.c */
2426 else if (tstatus == CHECK_CONDITION
2427 && SCpnt->device->type == TYPE_DISK
2428 && (SCpnt->sense_buffer[2] & 0xf) == RECOVERED_ERROR)
2429 status = DID_BUS_BUSY << 16;
2430
2431 else
2432 status = DID_OK << 16;
2433
2434 if (tstatus == GOOD)
2435 ha->target_redo[SCpnt->device->id][SCpnt->device->
2436 channel] = 0;
2437
2438 if (spp->target_status && SCpnt->device->type == TYPE_DISK &&
2439 (!(tstatus == CHECK_CONDITION && ha->iocount <= 1000 &&
2440 (SCpnt->sense_buffer[2] & 0xf) == NOT_READY)))
2441 printk("%s: ihdlr, target %d.%d:%d, pid %ld, "
2442 "target_status 0x%x, sense key 0x%x.\n",
2443 ha->board_name,
2444 SCpnt->device->channel, SCpnt->device->id,
2445 SCpnt->device->lun, SCpnt->serial_number,
2446 spp->target_status, SCpnt->sense_buffer[2]);
2447
2448 ha->target_to[SCpnt->device->id][SCpnt->device->channel] = 0;
2449
2450 if (ha->last_retried_pid == SCpnt->serial_number)
2451 ha->retries = 0;
2452
2453 break;
2454 case ASST: /* Selection Time Out */
2455 case 0x02: /* Command Time Out */
2456
2457 if (ha->target_to[SCpnt->device->id][SCpnt->device->channel] > 1)
2458 status = DID_ERROR << 16;
2459 else {
2460 status = DID_TIME_OUT << 16;
2461 ha->target_to[SCpnt->device->id][SCpnt->device->
2462 channel]++;
2463 }
2464
2465 break;
2466
2467 /* Perform a limited number of internal retries */
2468 case 0x03: /* SCSI Bus Reset Received */
2469 case 0x04: /* Initial Controller Power-up */
2470
2471 for (c = 0; c <= shost->max_channel; c++)
2472 for (k = 0; k < shost->max_id; k++)
2473 ha->target_redo[k][c] = 1;
2474
2475 if (SCpnt->device->type != TYPE_TAPE
2476 && ha->retries < MAX_INTERNAL_RETRIES) {
2477
2478 #if defined(DID_SOFT_ERROR)
2479 status = DID_SOFT_ERROR << 16;
2480 #else
2481 status = DID_BUS_BUSY << 16;
2482 #endif
2483
2484 ha->retries++;
2485 ha->last_retried_pid = SCpnt->serial_number;
2486 } else
2487 status = DID_ERROR << 16;
2488
2489 break;
2490 case 0x05: /* Unexpected Bus Phase */
2491 case 0x06: /* Unexpected Bus Free */
2492 case 0x07: /* Bus Parity Error */
2493 case 0x08: /* SCSI Hung */
2494 case 0x09: /* Unexpected Message Reject */
2495 case 0x0a: /* SCSI Bus Reset Stuck */
2496 case 0x0b: /* Auto Request-Sense Failed */
2497 case 0x0c: /* Controller Ram Parity Error */
2498 default:
2499 status = DID_ERROR << 16;
2500 break;
2501 }
2502
2503 SCpnt->result = status | spp->target_status;
2504
2505 #if defined(DEBUG_INTERRUPT)
2506 if (SCpnt->result || do_trace)
2507 #else
2508 if ((spp->adapter_status != ASOK && ha->iocount > 1000) ||
2509 (spp->adapter_status != ASOK &&
2510 spp->adapter_status != ASST && ha->iocount <= 1000) ||
2511 do_trace || msg_byte(spp->target_status))
2512 #endif
2513 scmd_printk(KERN_INFO, SCpnt, "ihdlr, mbox %2d, err 0x%x:%x,"
2514 " pid %ld, reg 0x%x, count %d.\n",
2515 i, spp->adapter_status, spp->target_status,
2516 SCpnt->serial_number, reg, ha->iocount);
2517
2518 unmap_dma(i, ha);
2519
2520 /* Set the command state to inactive */
2521 SCpnt->host_scribble = NULL;
2522
2523 SCpnt->scsi_done(SCpnt);
2524
2525 if (do_trace)
2526 printk("%s: ihdlr, exit, irq %d, count %d.\n", ha->board_name,
2527 irq, ha->iocount);
2528
2529 handled:
2530 return IRQ_HANDLED;
2531 none:
2532 return IRQ_NONE;
2533 }
2534
2535 static irqreturn_t do_interrupt_handler(int dummy, void *shap)
2536 {
2537 struct Scsi_Host *shost;
2538 unsigned int j;
2539 unsigned long spin_flags;
2540 irqreturn_t ret;
2541
2542 /* Check if the interrupt must be processed by this handler */
2543 if ((j = (unsigned int)((char *)shap - sha)) >= num_boards)
2544 return IRQ_NONE;
2545 shost = sh[j];
2546
2547 spin_lock_irqsave(shost->host_lock, spin_flags);
2548 ret = ihdlr(shost);
2549 spin_unlock_irqrestore(shost->host_lock, spin_flags);
2550 return ret;
2551 }
2552
2553 static int eata2x_release(struct Scsi_Host *shost)
2554 {
2555 struct hostdata *ha = (struct hostdata *)shost->hostdata;
2556 unsigned int i;
2557
2558 for (i = 0; i < shost->can_queue; i++)
2559 kfree((&ha->cp[i])->sglist);
2560
2561 for (i = 0; i < shost->can_queue; i++)
2562 pci_unmap_single(ha->pdev, ha->cp[i].cp_dma_addr,
2563 sizeof(struct mscp), PCI_DMA_BIDIRECTIONAL);
2564
2565 if (ha->sp_cpu_addr)
2566 pci_free_consistent(ha->pdev, sizeof(struct mssp),
2567 ha->sp_cpu_addr, ha->sp_dma_addr);
2568
2569 free_irq(shost->irq, &sha[ha->board_number]);
2570
2571 if (shost->dma_channel != NO_DMA)
2572 free_dma(shost->dma_channel);
2573
2574 release_region(shost->io_port, shost->n_io_port);
2575 scsi_unregister(shost);
2576 return 0;
2577 }
2578
2579 #include "scsi_module.c"
2580
2581 #ifndef MODULE
2582 __setup("eata=", option_setup);
2583 #endif /* end MODULE */
Support for the Chinese Samsung S3C2440 based development boards