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ocfs2: fix several issues of append dio
[linux/fpc-iii.git] / drivers / scsi / eata.c
blob227dd2c2ec2f16d1cec7e7b2bb5894fa84862b5e
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 tag_suffix = ", simple tags";
950 } else if (tag_mode == TAG_ORDERED) {
951 tag_suffix = ", ordered tags";
952 } else {
953 tag_suffix = ", no tags";
954 }
955 scsi_change_queue_depth(dev, tqd);
956 } else if (TLDEV(dev->type) && linked_comm) {
957 scsi_change_queue_depth(dev, tqd);
958 tag_suffix = ", untagged";
959 } else {
960 scsi_change_queue_depth(dev, utqd);
961 tag_suffix = "";
962 }
963
964 if (TLDEV(dev->type) && linked_comm && dev->queue_depth > 2)
965 link_suffix = ", sorted";
966 else if (TLDEV(dev->type))
967 link_suffix = ", unsorted";
968 else
969 link_suffix = "";
970
971 sdev_printk(KERN_INFO, dev,
972 "cmds/lun %d%s%s.\n",
973 dev->queue_depth, link_suffix, tag_suffix);
974
975 return 0;
976 }
977
978 static int wait_on_busy(unsigned long iobase, unsigned int loop)
979 {
980 while (inb(iobase + REG_AUX_STATUS) & ABSY_ASSERTED) {
981 udelay(1L);
982 if (--loop == 0)
983 return 1;
984 }
985 return 0;
986 }
987
988 static int do_dma(unsigned long iobase, unsigned long addr, unchar cmd)
989 {
990 unsigned char *byaddr;
991 unsigned long devaddr;
992
993 if (wait_on_busy(iobase, (addr ? MAXLOOP * 100 : MAXLOOP)))
994 return 1;
995
996 if (addr) {
997 devaddr = H2DEV(addr);
998 byaddr = (unsigned char *)&devaddr;
999 outb(byaddr[3], iobase + REG_LOW);
1000 outb(byaddr[2], iobase + REG_LM);
1001 outb(byaddr[1], iobase + REG_MID);
1002 outb(byaddr[0], iobase + REG_MSB);
1003 }
1004
1005 outb(cmd, iobase + REG_CMD);
1006 return 0;
1007 }
1008
1009 static int read_pio(unsigned long iobase, ushort * start, ushort * end)
1010 {
1011 unsigned int loop = MAXLOOP;
1012 ushort *p;
1013
1014 for (p = start; p <= end; p++) {
1015 while (!(inb(iobase + REG_STATUS) & DRQ_ASSERTED)) {
1016 udelay(1L);
1017 if (--loop == 0)
1018 return 1;
1019 }
1020 loop = MAXLOOP;
1021 *p = REG2H(inw(iobase));
1022 }
1023
1024 return 0;
1025 }
1026
1027 static struct pci_dev *get_pci_dev(unsigned long port_base)
1028 {
1029 #if defined(CONFIG_PCI)
1030 unsigned int addr;
1031 struct pci_dev *dev = NULL;
1032
1033 while ((dev = pci_get_class(PCI_CLASS_STORAGE_SCSI << 8, dev))) {
1034 addr = pci_resource_start(dev, 0);
1035
1036 #if defined(DEBUG_PCI_DETECT)
1037 printk("%s: get_pci_dev, bus %d, devfn 0x%x, addr 0x%x.\n",
1038 driver_name, dev->bus->number, dev->devfn, addr);
1039 #endif
1040
1041 /* we are in so much trouble for a pci hotplug system with this driver
1042 * anyway, so doing this at least lets people unload the driver and not
1043 * cause memory problems, but in general this is a bad thing to do (this
1044 * driver needs to be converted to the proper PCI api someday... */
1045 pci_dev_put(dev);
1046 if (addr + PCI_BASE_ADDRESS_0 == port_base)
1047 return dev;
1048 }
1049 #endif /* end CONFIG_PCI */
1050 return NULL;
1051 }
1052
1053 static void enable_pci_ports(void)
1054 {
1055 #if defined(CONFIG_PCI)
1056 struct pci_dev *dev = NULL;
1057
1058 while ((dev = pci_get_class(PCI_CLASS_STORAGE_SCSI << 8, dev))) {
1059 #if defined(DEBUG_PCI_DETECT)
1060 printk("%s: enable_pci_ports, bus %d, devfn 0x%x.\n",
1061 driver_name, dev->bus->number, dev->devfn);
1062 #endif
1063
1064 if (pci_enable_device(dev))
1065 printk
1066 ("%s: warning, pci_enable_device failed, bus %d devfn 0x%x.\n",
1067 driver_name, dev->bus->number, dev->devfn);
1068 }
1069
1070 #endif /* end CONFIG_PCI */
1071 }
1072
1073 static int port_detect(unsigned long port_base, unsigned int j,
1074 struct scsi_host_template *tpnt)
1075 {
1076 unsigned char irq, dma_channel, subversion, i, is_pci = 0;
1077 unsigned char protocol_rev;
1078 struct eata_info info;
1079 char *bus_type, dma_name[16];
1080 struct pci_dev *pdev;
1081 /* Allowed DMA channels for ISA (0 indicates reserved) */
1082 unsigned char dma_channel_table[4] = { 5, 6, 7, 0 };
1083 struct Scsi_Host *shost;
1084 struct hostdata *ha;
1085 char name[16];
1086
1087 sprintf(name, "%s%d", driver_name, j);
1088
1089 if (!request_region(port_base, REGION_SIZE, driver_name)) {
1090 #if defined(DEBUG_DETECT)
1091 printk("%s: address 0x%03lx in use, skipping probe.\n", name,
1092 port_base);
1093 #endif
1094 goto fail;
1095 }
1096
1097 if (do_dma(port_base, 0, READ_CONFIG_PIO)) {
1098 #if defined(DEBUG_DETECT)
1099 printk("%s: detect, do_dma failed at 0x%03lx.\n", name,
1100 port_base);
1101 #endif
1102 goto freelock;
1103 }
1104
1105 /* Read the info structure */
1106 if (read_pio(port_base, (ushort *) & info, (ushort *) & info.ipad[0])) {
1107 #if defined(DEBUG_DETECT)
1108 printk("%s: detect, read_pio failed at 0x%03lx.\n", name,
1109 port_base);
1110 #endif
1111 goto freelock;
1112 }
1113
1114 info.data_len = DEV2H(info.data_len);
1115 info.sign = DEV2H(info.sign);
1116 info.cp_pad_len = DEV2H16(info.cp_pad_len);
1117 info.cp_len = DEV2H(info.cp_len);
1118 info.sp_len = DEV2H(info.sp_len);
1119 info.scatt_size = DEV2H16(info.scatt_size);
1120 info.queue_size = DEV2H16(info.queue_size);
1121
1122 /* Check the controller "EATA" signature */
1123 if (info.sign != EATA_SIG_BE) {
1124 #if defined(DEBUG_DETECT)
1125 printk("%s: signature 0x%04x discarded.\n", name, info.sign);
1126 #endif
1127 goto freelock;
1128 }
1129
1130 if (info.data_len < EATA_2_0A_SIZE) {
1131 printk
1132 ("%s: config structure size (%d bytes) too short, detaching.\n",
1133 name, info.data_len);
1134 goto freelock;
1135 } else if (info.data_len == EATA_2_0A_SIZE)
1136 protocol_rev = 'A';
1137 else if (info.data_len == EATA_2_0B_SIZE)
1138 protocol_rev = 'B';
1139 else
1140 protocol_rev = 'C';
1141
1142 if (protocol_rev != 'A' && info.forcaddr) {
1143 printk("%s: warning, port address has been forced.\n", name);
1144 bus_type = "PCI";
1145 is_pci = 1;
1146 subversion = ESA;
1147 } else if (port_base > MAX_EISA_ADDR
1148 || (protocol_rev == 'C' && info.pci)) {
1149 bus_type = "PCI";
1150 is_pci = 1;
1151 subversion = ESA;
1152 } else if (port_base >= MIN_EISA_ADDR
1153 || (protocol_rev == 'C' && info.eisa)) {
1154 bus_type = "EISA";
1155 subversion = ESA;
1156 } else if (protocol_rev == 'C' && !info.eisa && !info.pci) {
1157 bus_type = "ISA";
1158 subversion = ISA;
1159 } else if (port_base > MAX_ISA_ADDR) {
1160 bus_type = "PCI";
1161 is_pci = 1;
1162 subversion = ESA;
1163 } else {
1164 bus_type = "ISA";
1165 subversion = ISA;
1166 }
1167
1168 if (!info.haaval || info.ata) {
1169 printk
1170 ("%s: address 0x%03lx, unusable %s board (%d%d), detaching.\n",
1171 name, port_base, bus_type, info.haaval, info.ata);
1172 goto freelock;
1173 }
1174
1175 if (info.drqvld) {
1176 if (subversion == ESA)
1177 printk("%s: warning, weird %s board using DMA.\n", name,
1178 bus_type);
1179
1180 subversion = ISA;
1181 dma_channel = dma_channel_table[3 - info.drqx];
1182 } else {
1183 if (subversion == ISA)
1184 printk("%s: warning, weird %s board not using DMA.\n",
1185 name, bus_type);
1186
1187 subversion = ESA;
1188 dma_channel = NO_DMA;
1189 }
1190
1191 if (!info.dmasup)
1192 printk("%s: warning, DMA protocol support not asserted.\n",
1193 name);
1194
1195 irq = info.irq;
1196
1197 if (subversion == ESA && !info.irq_tr)
1198 printk
1199 ("%s: warning, LEVEL triggering is suggested for IRQ %u.\n",
1200 name, irq);
1201
1202 if (is_pci) {
1203 pdev = get_pci_dev(port_base);
1204 if (!pdev)
1205 printk
1206 ("%s: warning, failed to get pci_dev structure.\n",
1207 name);
1208 } else
1209 pdev = NULL;
1210
1211 if (pdev && (irq != pdev->irq)) {
1212 printk("%s: IRQ %u mapped to IO-APIC IRQ %u.\n", name, irq,
1213 pdev->irq);
1214 irq = pdev->irq;
1215 }
1216
1217 /* Board detected, allocate its IRQ */
1218 if (request_irq(irq, do_interrupt_handler,
1219 (subversion == ESA) ? IRQF_SHARED : 0,
1220 driver_name, (void *)&sha[j])) {
1221 printk("%s: unable to allocate IRQ %u, detaching.\n", name,
1222 irq);
1223 goto freelock;
1224 }
1225
1226 if (subversion == ISA && request_dma(dma_channel, driver_name)) {
1227 printk("%s: unable to allocate DMA channel %u, detaching.\n",
1228 name, dma_channel);
1229 goto freeirq;
1230 }
1231 #if defined(FORCE_CONFIG)
1232 {
1233 struct eata_config *cf;
1234 dma_addr_t cf_dma_addr;
1235
1236 cf = pci_zalloc_consistent(pdev, sizeof(struct eata_config),
1237 &cf_dma_addr);
1238
1239 if (!cf) {
1240 printk
1241 ("%s: config, pci_alloc_consistent failed, detaching.\n",
1242 name);
1243 goto freedma;
1244 }
1245
1246 /* Set board configuration */
1247 cf->len = (ushort) H2DEV16((ushort) 510);
1248 cf->ocena = 1;
1249
1250 if (do_dma(port_base, cf_dma_addr, SET_CONFIG_DMA)) {
1251 printk
1252 ("%s: busy timeout sending configuration, detaching.\n",
1253 name);
1254 pci_free_consistent(pdev, sizeof(struct eata_config),
1255 cf, cf_dma_addr);
1256 goto freedma;
1257 }
1258
1259 }
1260 #endif
1261
1262 sh[j] = shost = scsi_register(tpnt, sizeof(struct hostdata));
1263 if (shost == NULL) {
1264 printk("%s: unable to register host, detaching.\n", name);
1265 goto freedma;
1266 }
1267
1268 shost->io_port = port_base;
1269 shost->unique_id = port_base;
1270 shost->n_io_port = REGION_SIZE;
1271 shost->dma_channel = dma_channel;
1272 shost->irq = irq;
1273 shost->sg_tablesize = (ushort) info.scatt_size;
1274 shost->this_id = (ushort) info.host_addr[3];
1275 shost->can_queue = (ushort) info.queue_size;
1276 shost->cmd_per_lun = MAX_CMD_PER_LUN;
1277
1278 ha = (struct hostdata *)shost->hostdata;
1279
1280 memset(ha, 0, sizeof(struct hostdata));
1281 ha->subversion = subversion;
1282 ha->protocol_rev = protocol_rev;
1283 ha->is_pci = is_pci;
1284 ha->pdev = pdev;
1285 ha->board_number = j;
1286
1287 if (ha->subversion == ESA)
1288 shost->unchecked_isa_dma = 0;
1289 else {
1290 unsigned long flags;
1291 shost->unchecked_isa_dma = 1;
1292
1293 flags = claim_dma_lock();
1294 disable_dma(dma_channel);
1295 clear_dma_ff(dma_channel);
1296 set_dma_mode(dma_channel, DMA_MODE_CASCADE);
1297 enable_dma(dma_channel);
1298 release_dma_lock(flags);
1299
1300 }
1301
1302 strcpy(ha->board_name, name);
1303
1304 /* DPT PM2012 does not allow to detect sg_tablesize correctly */
1305 if (shost->sg_tablesize > MAX_SGLIST || shost->sg_tablesize < 2) {
1306 printk("%s: detect, wrong n. of SG lists %d, fixed.\n",
1307 ha->board_name, shost->sg_tablesize);
1308 shost->sg_tablesize = MAX_SGLIST;
1309 }
1310
1311 /* DPT PM2012 does not allow to detect can_queue correctly */
1312 if (shost->can_queue > MAX_MAILBOXES || shost->can_queue < 2) {
1313 printk("%s: detect, wrong n. of mbox %d, fixed.\n",
1314 ha->board_name, shost->can_queue);
1315 shost->can_queue = MAX_MAILBOXES;
1316 }
1317
1318 if (protocol_rev != 'A') {
1319 if (info.max_chan > 0 && info.max_chan < MAX_CHANNEL)
1320 shost->max_channel = info.max_chan;
1321
1322 if (info.max_id > 7 && info.max_id < MAX_TARGET)
1323 shost->max_id = info.max_id + 1;
1324
1325 if (info.large_sg && shost->sg_tablesize == MAX_SGLIST)
1326 shost->sg_tablesize = MAX_LARGE_SGLIST;
1327 }
1328
1329 if (protocol_rev == 'C') {
1330 if (info.max_lun > 7 && info.max_lun < MAX_LUN)
1331 shost->max_lun = info.max_lun + 1;
1332 }
1333
1334 if (dma_channel == NO_DMA)
1335 sprintf(dma_name, "%s", "BMST");
1336 else
1337 sprintf(dma_name, "DMA %u", dma_channel);
1338
1339 for (i = 0; i < shost->can_queue; i++)
1340 ha->cp[i].cp_dma_addr = pci_map_single(ha->pdev,
1341 &ha->cp[i],
1342 sizeof(struct mscp),
1343 PCI_DMA_BIDIRECTIONAL);
1344
1345 for (i = 0; i < shost->can_queue; i++) {
1346 size_t sz = shost->sg_tablesize *sizeof(struct sg_list);
1347 gfp_t gfp_mask = (shost->unchecked_isa_dma ? GFP_DMA : 0) | GFP_ATOMIC;
1348 ha->cp[i].sglist = kmalloc(sz, gfp_mask);
1349 if (!ha->cp[i].sglist) {
1350 printk
1351 ("%s: kmalloc SGlist failed, mbox %d, detaching.\n",
1352 ha->board_name, i);
1353 goto release;
1354 }
1355 }
1356
1357 if (!(ha->sp_cpu_addr = pci_alloc_consistent(ha->pdev,
1358 sizeof(struct mssp),
1359 &ha->sp_dma_addr))) {
1360 printk("%s: pci_alloc_consistent failed, detaching.\n", ha->board_name);
1361 goto release;
1362 }
1363
1364 if (max_queue_depth > MAX_TAGGED_CMD_PER_LUN)
1365 max_queue_depth = MAX_TAGGED_CMD_PER_LUN;
1366
1367 if (max_queue_depth < MAX_CMD_PER_LUN)
1368 max_queue_depth = MAX_CMD_PER_LUN;
1369
1370 if (tag_mode != TAG_DISABLED && tag_mode != TAG_SIMPLE)
1371 tag_mode = TAG_ORDERED;
1372
1373 if (j == 0) {
1374 printk
1375 ("EATA/DMA 2.0x: Copyright (C) 1994-2003 Dario Ballabio.\n");
1376 printk
1377 ("%s config options -> tm:%d, lc:%c, mq:%d, rs:%c, et:%c, "
1378 "ip:%c, ep:%c, pp:%c.\n", driver_name, tag_mode,
1379 YESNO(linked_comm), max_queue_depth, YESNO(rev_scan),
1380 YESNO(ext_tran), YESNO(isa_probe), YESNO(eisa_probe),
1381 YESNO(pci_probe));
1382 }
1383
1384 printk("%s: 2.0%c, %s 0x%03lx, IRQ %u, %s, SG %d, MB %d.\n",
1385 ha->board_name, ha->protocol_rev, bus_type,
1386 (unsigned long)shost->io_port, shost->irq, dma_name,
1387 shost->sg_tablesize, shost->can_queue);
1388
1389 if (shost->max_id > 8 || shost->max_lun > 8)
1390 printk
1391 ("%s: wide SCSI support enabled, max_id %u, max_lun %llu.\n",
1392 ha->board_name, shost->max_id, shost->max_lun);
1393
1394 for (i = 0; i <= shost->max_channel; i++)
1395 printk("%s: SCSI channel %u enabled, host target ID %d.\n",
1396 ha->board_name, i, info.host_addr[3 - i]);
1397
1398 #if defined(DEBUG_DETECT)
1399 printk("%s: Vers. 0x%x, ocs %u, tar %u, trnxfr %u, more %u, SYNC 0x%x, "
1400 "sec. %u, infol %d, cpl %d spl %d.\n", name, info.version,
1401 info.ocsena, info.tarsup, info.trnxfr, info.morsup, info.sync,
1402 info.second, info.data_len, info.cp_len, info.sp_len);
1403
1404 if (protocol_rev == 'B' || protocol_rev == 'C')
1405 printk("%s: isaena %u, forcaddr %u, max_id %u, max_chan %u, "
1406 "large_sg %u, res1 %u.\n", name, info.isaena,
1407 info.forcaddr, info.max_id, info.max_chan, info.large_sg,
1408 info.res1);
1409
1410 if (protocol_rev == 'C')
1411 printk("%s: max_lun %u, m1 %u, idquest %u, pci %u, eisa %u, "
1412 "raidnum %u.\n", name, info.max_lun, info.m1,
1413 info.idquest, info.pci, info.eisa, info.raidnum);
1414 #endif
1415
1416 if (ha->pdev) {
1417 pci_set_master(ha->pdev);
1418 if (pci_set_dma_mask(ha->pdev, DMA_BIT_MASK(32)))
1419 printk("%s: warning, pci_set_dma_mask failed.\n",
1420 ha->board_name);
1421 }
1422
1423 return 1;
1424
1425 freedma:
1426 if (subversion == ISA)
1427 free_dma(dma_channel);
1428 freeirq:
1429 free_irq(irq, &sha[j]);
1430 freelock:
1431 release_region(port_base, REGION_SIZE);
1432 fail:
1433 return 0;
1434
1435 release:
1436 eata2x_release(shost);
1437 return 0;
1438 }
1439
1440 static void internal_setup(char *str, int *ints)
1441 {
1442 int i, argc = ints[0];
1443 char *cur = str, *pc;
1444
1445 if (argc > 0) {
1446 if (argc > MAX_INT_PARAM)
1447 argc = MAX_INT_PARAM;
1448
1449 for (i = 0; i < argc; i++)
1450 io_port[i] = ints[i + 1];
1451
1452 io_port[i] = 0;
1453 setup_done = 1;
1454 }
1455
1456 while (cur && (pc = strchr(cur, ':'))) {
1457 int val = 0, c = *++pc;
1458
1459 if (c == 'n' || c == 'N')
1460 val = 0;
1461 else if (c == 'y' || c == 'Y')
1462 val = 1;
1463 else
1464 val = (int)simple_strtoul(pc, NULL, 0);
1465
1466 if (!strncmp(cur, "lc:", 3))
1467 linked_comm = val;
1468 else if (!strncmp(cur, "tm:", 3))
1469 tag_mode = val;
1470 else if (!strncmp(cur, "tc:", 3))
1471 tag_mode = val;
1472 else if (!strncmp(cur, "mq:", 3))
1473 max_queue_depth = val;
1474 else if (!strncmp(cur, "ls:", 3))
1475 link_statistics = val;
1476 else if (!strncmp(cur, "et:", 3))
1477 ext_tran = val;
1478 else if (!strncmp(cur, "rs:", 3))
1479 rev_scan = val;
1480 else if (!strncmp(cur, "ip:", 3))
1481 isa_probe = val;
1482 else if (!strncmp(cur, "ep:", 3))
1483 eisa_probe = val;
1484 else if (!strncmp(cur, "pp:", 3))
1485 pci_probe = val;
1486
1487 if ((cur = strchr(cur, ',')))
1488 ++cur;
1489 }
1490
1491 return;
1492 }
1493
1494 static int option_setup(char *str)
1495 {
1496 int ints[MAX_INT_PARAM];
1497 char *cur = str;
1498 int i = 1;
1499
1500 while (cur && isdigit(*cur) && i < MAX_INT_PARAM) {
1501 ints[i++] = simple_strtoul(cur, NULL, 0);
1502
1503 if ((cur = strchr(cur, ',')) != NULL)
1504 cur++;
1505 }
1506
1507 ints[0] = i - 1;
1508 internal_setup(cur, ints);
1509 return 1;
1510 }
1511
1512 static void add_pci_ports(void)
1513 {
1514 #if defined(CONFIG_PCI)
1515 unsigned int addr, k;
1516 struct pci_dev *dev = NULL;
1517
1518 for (k = 0; k < MAX_PCI; k++) {
1519
1520 if (!(dev = pci_get_class(PCI_CLASS_STORAGE_SCSI << 8, dev)))
1521 break;
1522
1523 if (pci_enable_device(dev)) {
1524 #if defined(DEBUG_PCI_DETECT)
1525 printk
1526 ("%s: detect, bus %d, devfn 0x%x, pci_enable_device failed.\n",
1527 driver_name, dev->bus->number, dev->devfn);
1528 #endif
1529
1530 continue;
1531 }
1532
1533 addr = pci_resource_start(dev, 0);
1534
1535 #if defined(DEBUG_PCI_DETECT)
1536 printk("%s: detect, seq. %d, bus %d, devfn 0x%x, addr 0x%x.\n",
1537 driver_name, k, dev->bus->number, dev->devfn, addr);
1538 #endif
1539
1540 /* Order addresses according to rev_scan value */
1541 io_port[MAX_INT_PARAM + (rev_scan ? (MAX_PCI - k) : (1 + k))] =
1542 addr + PCI_BASE_ADDRESS_0;
1543 }
1544
1545 pci_dev_put(dev);
1546 #endif /* end CONFIG_PCI */
1547 }
1548
1549 static int eata2x_detect(struct scsi_host_template *tpnt)
1550 {
1551 unsigned int j = 0, k;
1552
1553 tpnt->proc_name = "eata2x";
1554
1555 if (strlen(boot_options))
1556 option_setup(boot_options);
1557
1558 #if defined(MODULE)
1559 /* io_port could have been modified when loading as a module */
1560 if (io_port[0] != SKIP) {
1561 setup_done = 1;
1562 io_port[MAX_INT_PARAM] = 0;
1563 }
1564 #endif
1565
1566 for (k = MAX_INT_PARAM; io_port[k]; k++)
1567 if (io_port[k] == SKIP)
1568 continue;
1569 else if (io_port[k] <= MAX_ISA_ADDR) {
1570 if (!isa_probe)
1571 io_port[k] = SKIP;
1572 } else if (io_port[k] >= MIN_EISA_ADDR
1573 && io_port[k] <= MAX_EISA_ADDR) {
1574 if (!eisa_probe)
1575 io_port[k] = SKIP;
1576 }
1577
1578 if (pci_probe) {
1579 if (!setup_done)
1580 add_pci_ports();
1581 else
1582 enable_pci_ports();
1583 }
1584
1585 for (k = 0; io_port[k]; k++) {
1586
1587 if (io_port[k] == SKIP)
1588 continue;
1589
1590 if (j < MAX_BOARDS && port_detect(io_port[k], j, tpnt))
1591 j++;
1592 }
1593
1594 num_boards = j;
1595 return j;
1596 }
1597
1598 static void map_dma(unsigned int i, struct hostdata *ha)
1599 {
1600 unsigned int k, pci_dir;
1601 int count;
1602 struct scatterlist *sg;
1603 struct mscp *cpp;
1604 struct scsi_cmnd *SCpnt;
1605
1606 cpp = &ha->cp[i];
1607 SCpnt = cpp->SCpnt;
1608 pci_dir = SCpnt->sc_data_direction;
1609
1610 if (SCpnt->sense_buffer)
1611 cpp->sense_addr =
1612 H2DEV(pci_map_single(ha->pdev, SCpnt->sense_buffer,
1613 SCSI_SENSE_BUFFERSIZE, PCI_DMA_FROMDEVICE));
1614
1615 cpp->sense_len = SCSI_SENSE_BUFFERSIZE;
1616
1617 if (!scsi_sg_count(SCpnt)) {
1618 cpp->data_len = 0;
1619 return;
1620 }
1621
1622 count = pci_map_sg(ha->pdev, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
1623 pci_dir);
1624 BUG_ON(!count);
1625
1626 scsi_for_each_sg(SCpnt, sg, count, k) {
1627 cpp->sglist[k].address = H2DEV(sg_dma_address(sg));
1628 cpp->sglist[k].num_bytes = H2DEV(sg_dma_len(sg));
1629 }
1630
1631 cpp->sg = 1;
1632 cpp->data_address = H2DEV(pci_map_single(ha->pdev, cpp->sglist,
1633 scsi_sg_count(SCpnt) *
1634 sizeof(struct sg_list),
1635 pci_dir));
1636 cpp->data_len = H2DEV((scsi_sg_count(SCpnt) * sizeof(struct sg_list)));
1637 }
1638
1639 static void unmap_dma(unsigned int i, struct hostdata *ha)
1640 {
1641 unsigned int pci_dir;
1642 struct mscp *cpp;
1643 struct scsi_cmnd *SCpnt;
1644
1645 cpp = &ha->cp[i];
1646 SCpnt = cpp->SCpnt;
1647 pci_dir = SCpnt->sc_data_direction;
1648
1649 if (DEV2H(cpp->sense_addr))
1650 pci_unmap_single(ha->pdev, DEV2H(cpp->sense_addr),
1651 DEV2H(cpp->sense_len), PCI_DMA_FROMDEVICE);
1652
1653 if (scsi_sg_count(SCpnt))
1654 pci_unmap_sg(ha->pdev, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
1655 pci_dir);
1656
1657 if (!DEV2H(cpp->data_len))
1658 pci_dir = PCI_DMA_BIDIRECTIONAL;
1659
1660 if (DEV2H(cpp->data_address))
1661 pci_unmap_single(ha->pdev, DEV2H(cpp->data_address),
1662 DEV2H(cpp->data_len), pci_dir);
1663 }
1664
1665 static void sync_dma(unsigned int i, struct hostdata *ha)
1666 {
1667 unsigned int pci_dir;
1668 struct mscp *cpp;
1669 struct scsi_cmnd *SCpnt;
1670
1671 cpp = &ha->cp[i];
1672 SCpnt = cpp->SCpnt;
1673 pci_dir = SCpnt->sc_data_direction;
1674
1675 if (DEV2H(cpp->sense_addr))
1676 pci_dma_sync_single_for_cpu(ha->pdev, DEV2H(cpp->sense_addr),
1677 DEV2H(cpp->sense_len),
1678 PCI_DMA_FROMDEVICE);
1679
1680 if (scsi_sg_count(SCpnt))
1681 pci_dma_sync_sg_for_cpu(ha->pdev, scsi_sglist(SCpnt),
1682 scsi_sg_count(SCpnt), pci_dir);
1683
1684 if (!DEV2H(cpp->data_len))
1685 pci_dir = PCI_DMA_BIDIRECTIONAL;
1686
1687 if (DEV2H(cpp->data_address))
1688 pci_dma_sync_single_for_cpu(ha->pdev,
1689 DEV2H(cpp->data_address),
1690 DEV2H(cpp->data_len), pci_dir);
1691 }
1692
1693 static void scsi_to_dev_dir(unsigned int i, struct hostdata *ha)
1694 {
1695 unsigned int k;
1696
1697 static const unsigned char data_out_cmds[] = {
1698 0x0a, 0x2a, 0x15, 0x55, 0x04, 0x07, 0x18, 0x1d, 0x24, 0x2e,
1699 0x30, 0x31, 0x32, 0x38, 0x39, 0x3a, 0x3b, 0x3d, 0x3f, 0x40,
1700 0x41, 0x4c, 0xaa, 0xae, 0xb0, 0xb1, 0xb2, 0xb6, 0xea, 0x1b, 0x5d
1701 };
1702
1703 static const unsigned char data_none_cmds[] = {
1704 0x01, 0x0b, 0x10, 0x11, 0x13, 0x16, 0x17, 0x19, 0x2b, 0x1e,
1705 0x2c, 0xac, 0x2f, 0xaf, 0x33, 0xb3, 0x35, 0x36, 0x45, 0x47,
1706 0x48, 0x49, 0xa9, 0x4b, 0xa5, 0xa6, 0xb5, 0x00
1707 };
1708
1709 struct mscp *cpp;
1710 struct scsi_cmnd *SCpnt;
1711
1712 cpp = &ha->cp[i];
1713 SCpnt = cpp->SCpnt;
1714
1715 if (SCpnt->sc_data_direction == DMA_FROM_DEVICE) {
1716 cpp->din = 1;
1717 cpp->dout = 0;
1718 return;
1719 } else if (SCpnt->sc_data_direction == DMA_TO_DEVICE) {
1720 cpp->din = 0;
1721 cpp->dout = 1;
1722 return;
1723 } else if (SCpnt->sc_data_direction == DMA_NONE) {
1724 cpp->din = 0;
1725 cpp->dout = 0;
1726 return;
1727 }
1728
1729 if (SCpnt->sc_data_direction != DMA_BIDIRECTIONAL)
1730 panic("%s: qcomm, invalid SCpnt->sc_data_direction.\n",
1731 ha->board_name);
1732
1733 for (k = 0; k < ARRAY_SIZE(data_out_cmds); k++)
1734 if (SCpnt->cmnd[0] == data_out_cmds[k]) {
1735 cpp->dout = 1;
1736 break;
1737 }
1738
1739 if ((cpp->din = !cpp->dout))
1740 for (k = 0; k < ARRAY_SIZE(data_none_cmds); k++)
1741 if (SCpnt->cmnd[0] == data_none_cmds[k]) {
1742 cpp->din = 0;
1743 break;
1744 }
1745
1746 }
1747
1748 static int eata2x_queuecommand_lck(struct scsi_cmnd *SCpnt,
1749 void (*done) (struct scsi_cmnd *))
1750 {
1751 struct Scsi_Host *shost = SCpnt->device->host;
1752 struct hostdata *ha = (struct hostdata *)shost->hostdata;
1753 unsigned int i, k;
1754 struct mscp *cpp;
1755
1756 if (SCpnt->host_scribble)
1757 panic("%s: qcomm, SCpnt %p already active.\n",
1758 ha->board_name, SCpnt);
1759
1760 /* i is the mailbox number, look for the first free mailbox
1761 starting from last_cp_used */
1762 i = ha->last_cp_used + 1;
1763
1764 for (k = 0; k < shost->can_queue; k++, i++) {
1765 if (i >= shost->can_queue)
1766 i = 0;
1767 if (ha->cp_stat[i] == FREE) {
1768 ha->last_cp_used = i;
1769 break;
1770 }
1771 }
1772
1773 if (k == shost->can_queue) {
1774 printk("%s: qcomm, no free mailbox.\n", ha->board_name);
1775 return 1;
1776 }
1777
1778 /* Set pointer to control packet structure */
1779 cpp = &ha->cp[i];
1780
1781 memset(cpp, 0, sizeof(struct mscp) - CP_TAIL_SIZE);
1782
1783 /* Set pointer to status packet structure, Big Endian format */
1784 cpp->sp_dma_addr = H2DEV(ha->sp_dma_addr);
1785
1786 SCpnt->scsi_done = done;
1787 cpp->cpp_index = i;
1788 SCpnt->host_scribble = (unsigned char *)&cpp->cpp_index;
1789
1790 if (do_trace)
1791 scmd_printk(KERN_INFO, SCpnt,
1792 "qcomm, mbox %d.\n", i);
1793
1794 cpp->reqsen = 1;
1795 cpp->dispri = 1;
1796 #if 0
1797 if (SCpnt->device->type == TYPE_TAPE)
1798 cpp->hbaci = 1;
1799 #endif
1800 cpp->one = 1;
1801 cpp->channel = SCpnt->device->channel;
1802 cpp->target = SCpnt->device->id;
1803 cpp->lun = SCpnt->device->lun;
1804 cpp->SCpnt = SCpnt;
1805 memcpy(cpp->cdb, SCpnt->cmnd, SCpnt->cmd_len);
1806
1807 /* Use data transfer direction SCpnt->sc_data_direction */
1808 scsi_to_dev_dir(i, ha);
1809
1810 /* Map DMA buffers and SG list */
1811 map_dma(i, ha);
1812
1813 if (linked_comm && SCpnt->device->queue_depth > 2
1814 && TLDEV(SCpnt->device->type)) {
1815 ha->cp_stat[i] = READY;
1816 flush_dev(SCpnt->device, blk_rq_pos(SCpnt->request), ha, 0);
1817 return 0;
1818 }
1819
1820 /* Send control packet to the board */
1821 if (do_dma(shost->io_port, cpp->cp_dma_addr, SEND_CP_DMA)) {
1822 unmap_dma(i, ha);
1823 SCpnt->host_scribble = NULL;
1824 scmd_printk(KERN_INFO, SCpnt, "qcomm, adapter busy.\n");
1825 return 1;
1826 }
1827
1828 ha->cp_stat[i] = IN_USE;
1829 return 0;
1830 }
1831
1832 static DEF_SCSI_QCMD(eata2x_queuecommand)
1833
1834 static int eata2x_eh_abort(struct scsi_cmnd *SCarg)
1835 {
1836 struct Scsi_Host *shost = SCarg->device->host;
1837 struct hostdata *ha = (struct hostdata *)shost->hostdata;
1838 unsigned int i;
1839
1840 if (SCarg->host_scribble == NULL) {
1841 scmd_printk(KERN_INFO, SCarg, "abort, cmd inactive.\n");
1842 return SUCCESS;
1843 }
1844
1845 i = *(unsigned int *)SCarg->host_scribble;
1846 scmd_printk(KERN_WARNING, SCarg, "abort, mbox %d.\n", i);
1847
1848 if (i >= shost->can_queue)
1849 panic("%s: abort, invalid SCarg->host_scribble.\n", ha->board_name);
1850
1851 if (wait_on_busy(shost->io_port, MAXLOOP)) {
1852 printk("%s: abort, timeout error.\n", ha->board_name);
1853 return FAILED;
1854 }
1855
1856 if (ha->cp_stat[i] == FREE) {
1857 printk("%s: abort, mbox %d is free.\n", ha->board_name, i);
1858 return SUCCESS;
1859 }
1860
1861 if (ha->cp_stat[i] == IN_USE) {
1862 printk("%s: abort, mbox %d is in use.\n", ha->board_name, i);
1863
1864 if (SCarg != ha->cp[i].SCpnt)
1865 panic("%s: abort, mbox %d, SCarg %p, cp SCpnt %p.\n",
1866 ha->board_name, i, SCarg, ha->cp[i].SCpnt);
1867
1868 if (inb(shost->io_port + REG_AUX_STATUS) & IRQ_ASSERTED)
1869 printk("%s: abort, mbox %d, interrupt pending.\n",
1870 ha->board_name, i);
1871
1872 return FAILED;
1873 }
1874
1875 if (ha->cp_stat[i] == IN_RESET) {
1876 printk("%s: abort, mbox %d is in reset.\n", ha->board_name, i);
1877 return FAILED;
1878 }
1879
1880 if (ha->cp_stat[i] == LOCKED) {
1881 printk("%s: abort, mbox %d is locked.\n", ha->board_name, i);
1882 return SUCCESS;
1883 }
1884
1885 if (ha->cp_stat[i] == READY || ha->cp_stat[i] == ABORTING) {
1886 unmap_dma(i, ha);
1887 SCarg->result = DID_ABORT << 16;
1888 SCarg->host_scribble = NULL;
1889 ha->cp_stat[i] = FREE;
1890 printk("%s, abort, mbox %d ready, DID_ABORT, done.\n",
1891 ha->board_name, i);
1892 SCarg->scsi_done(SCarg);
1893 return SUCCESS;
1894 }
1895
1896 panic("%s: abort, mbox %d, invalid cp_stat.\n", ha->board_name, i);
1897 }
1898
1899 static int eata2x_eh_host_reset(struct scsi_cmnd *SCarg)
1900 {
1901 unsigned int i, time, k, c, limit = 0;
1902 int arg_done = 0;
1903 struct scsi_cmnd *SCpnt;
1904 struct Scsi_Host *shost = SCarg->device->host;
1905 struct hostdata *ha = (struct hostdata *)shost->hostdata;
1906
1907 scmd_printk(KERN_INFO, SCarg, "reset, enter.\n");
1908
1909 spin_lock_irq(shost->host_lock);
1910
1911 if (SCarg->host_scribble == NULL)
1912 printk("%s: reset, inactive.\n", ha->board_name);
1913
1914 if (ha->in_reset) {
1915 printk("%s: reset, exit, already in reset.\n", ha->board_name);
1916 spin_unlock_irq(shost->host_lock);
1917 return FAILED;
1918 }
1919
1920 if (wait_on_busy(shost->io_port, MAXLOOP)) {
1921 printk("%s: reset, exit, timeout error.\n", ha->board_name);
1922 spin_unlock_irq(shost->host_lock);
1923 return FAILED;
1924 }
1925
1926 ha->retries = 0;
1927
1928 for (c = 0; c <= shost->max_channel; c++)
1929 for (k = 0; k < shost->max_id; k++) {
1930 ha->target_redo[k][c] = 1;
1931 ha->target_to[k][c] = 0;
1932 }
1933
1934 for (i = 0; i < shost->can_queue; i++) {
1935
1936 if (ha->cp_stat[i] == FREE)
1937 continue;
1938
1939 if (ha->cp_stat[i] == LOCKED) {
1940 ha->cp_stat[i] = FREE;
1941 printk("%s: reset, locked mbox %d forced free.\n",
1942 ha->board_name, i);
1943 continue;
1944 }
1945
1946 if (!(SCpnt = ha->cp[i].SCpnt))
1947 panic("%s: reset, mbox %d, SCpnt == NULL.\n", ha->board_name, i);
1948
1949 if (ha->cp_stat[i] == READY || ha->cp_stat[i] == ABORTING) {
1950 ha->cp_stat[i] = ABORTING;
1951 printk("%s: reset, mbox %d aborting.\n",
1952 ha->board_name, i);
1953 }
1954
1955 else {
1956 ha->cp_stat[i] = IN_RESET;
1957 printk("%s: reset, mbox %d in reset.\n",
1958 ha->board_name, i);
1959 }
1960
1961 if (SCpnt->host_scribble == NULL)
1962 panic("%s: reset, mbox %d, garbled SCpnt.\n", ha->board_name, i);
1963
1964 if (*(unsigned int *)SCpnt->host_scribble != i)
1965 panic("%s: reset, mbox %d, index mismatch.\n", ha->board_name, i);
1966
1967 if (SCpnt->scsi_done == NULL)
1968 panic("%s: reset, mbox %d, SCpnt->scsi_done == NULL.\n",
1969 ha->board_name, i);
1970
1971 if (SCpnt == SCarg)
1972 arg_done = 1;
1973 }
1974
1975 if (do_dma(shost->io_port, 0, RESET_PIO)) {
1976 printk("%s: reset, cannot reset, timeout error.\n", ha->board_name);
1977 spin_unlock_irq(shost->host_lock);
1978 return FAILED;
1979 }
1980
1981 printk("%s: reset, board reset done, enabling interrupts.\n", ha->board_name);
1982
1983 #if defined(DEBUG_RESET)
1984 do_trace = 1;
1985 #endif
1986
1987 ha->in_reset = 1;
1988
1989 spin_unlock_irq(shost->host_lock);
1990
1991 /* FIXME: use a sleep instead */
1992 time = jiffies;
1993 while ((jiffies - time) < (10 * HZ) && limit++ < 200000)
1994 udelay(100L);
1995
1996 spin_lock_irq(shost->host_lock);
1997
1998 printk("%s: reset, interrupts disabled, loops %d.\n", ha->board_name, limit);
1999
2000 for (i = 0; i < shost->can_queue; i++) {
2001
2002 if (ha->cp_stat[i] == IN_RESET) {
2003 SCpnt = ha->cp[i].SCpnt;
2004 unmap_dma(i, ha);
2005 SCpnt->result = DID_RESET << 16;
2006 SCpnt->host_scribble = NULL;
2007
2008 /* This mailbox is still waiting for its interrupt */
2009 ha->cp_stat[i] = LOCKED;
2010
2011 printk
2012 ("%s, reset, mbox %d locked, DID_RESET, done.\n",
2013 ha->board_name, i);
2014 }
2015
2016 else if (ha->cp_stat[i] == ABORTING) {
2017 SCpnt = ha->cp[i].SCpnt;
2018 unmap_dma(i, ha);
2019 SCpnt->result = DID_RESET << 16;
2020 SCpnt->host_scribble = NULL;
2021
2022 /* This mailbox was never queued to the adapter */
2023 ha->cp_stat[i] = FREE;
2024
2025 printk
2026 ("%s, reset, mbox %d aborting, DID_RESET, done.\n",
2027 ha->board_name, i);
2028 }
2029
2030 else
2031 /* Any other mailbox has already been set free by interrupt */
2032 continue;
2033
2034 SCpnt->scsi_done(SCpnt);
2035 }
2036
2037 ha->in_reset = 0;
2038 do_trace = 0;
2039
2040 if (arg_done)
2041 printk("%s: reset, exit, done.\n", ha->board_name);
2042 else
2043 printk("%s: reset, exit.\n", ha->board_name);
2044
2045 spin_unlock_irq(shost->host_lock);
2046 return SUCCESS;
2047 }
2048
2049 int eata2x_bios_param(struct scsi_device *sdev, struct block_device *bdev,
2050 sector_t capacity, int *dkinfo)
2051 {
2052 unsigned int size = capacity;
2053
2054 if (ext_tran || (scsicam_bios_param(bdev, capacity, dkinfo) < 0)) {
2055 dkinfo[0] = 255;
2056 dkinfo[1] = 63;
2057 dkinfo[2] = size / (dkinfo[0] * dkinfo[1]);
2058 }
2059 #if defined (DEBUG_GEOMETRY)
2060 printk("%s: bios_param, head=%d, sec=%d, cyl=%d.\n", driver_name,
2061 dkinfo[0], dkinfo[1], dkinfo[2]);
2062 #endif
2063
2064 return 0;
2065 }
2066
2067 static void sort(unsigned long sk[], unsigned int da[], unsigned int n,
2068 unsigned int rev)
2069 {
2070 unsigned int i, j, k, y;
2071 unsigned long x;
2072
2073 for (i = 0; i < n - 1; i++) {
2074 k = i;
2075
2076 for (j = k + 1; j < n; j++)
2077 if (rev) {
2078 if (sk[j] > sk[k])
2079 k = j;
2080 } else {
2081 if (sk[j] < sk[k])
2082 k = j;
2083 }
2084
2085 if (k != i) {
2086 x = sk[k];
2087 sk[k] = sk[i];
2088 sk[i] = x;
2089 y = da[k];
2090 da[k] = da[i];
2091 da[i] = y;
2092 }
2093 }
2094
2095 return;
2096 }
2097
2098 static int reorder(struct hostdata *ha, unsigned long cursec,
2099 unsigned int ihdlr, unsigned int il[], unsigned int n_ready)
2100 {
2101 struct scsi_cmnd *SCpnt;
2102 struct mscp *cpp;
2103 unsigned int k, n;
2104 unsigned int rev = 0, s = 1, r = 1;
2105 unsigned int input_only = 1, overlap = 0;
2106 unsigned long sl[n_ready], pl[n_ready], ll[n_ready];
2107 unsigned long maxsec = 0, minsec = ULONG_MAX, seek = 0, iseek = 0;
2108 unsigned long ioseek = 0;
2109
2110 static unsigned int flushcount = 0, batchcount = 0, sortcount = 0;
2111 static unsigned int readycount = 0, ovlcount = 0, inputcount = 0;
2112 static unsigned int readysorted = 0, revcount = 0;
2113 static unsigned long seeksorted = 0, seeknosort = 0;
2114
2115 if (link_statistics && !(++flushcount % link_statistics))
2116 printk("fc %d bc %d ic %d oc %d rc %d rs %d sc %d re %d"
2117 " av %ldK as %ldK.\n", flushcount, batchcount,
2118 inputcount, ovlcount, readycount, readysorted, sortcount,
2119 revcount, seeknosort / (readycount + 1),
2120 seeksorted / (readycount + 1));
2121
2122 if (n_ready <= 1)
2123 return 0;
2124
2125 for (n = 0; n < n_ready; n++) {
2126 k = il[n];
2127 cpp = &ha->cp[k];
2128 SCpnt = cpp->SCpnt;
2129
2130 if (!cpp->din)
2131 input_only = 0;
2132
2133 if (blk_rq_pos(SCpnt->request) < minsec)
2134 minsec = blk_rq_pos(SCpnt->request);
2135 if (blk_rq_pos(SCpnt->request) > maxsec)
2136 maxsec = blk_rq_pos(SCpnt->request);
2137
2138 sl[n] = blk_rq_pos(SCpnt->request);
2139 ioseek += blk_rq_sectors(SCpnt->request);
2140
2141 if (!n)
2142 continue;
2143
2144 if (sl[n] < sl[n - 1])
2145 s = 0;
2146 if (sl[n] > sl[n - 1])
2147 r = 0;
2148
2149 if (link_statistics) {
2150 if (sl[n] > sl[n - 1])
2151 seek += sl[n] - sl[n - 1];
2152 else
2153 seek += sl[n - 1] - sl[n];
2154 }
2155
2156 }
2157
2158 if (link_statistics) {
2159 if (cursec > sl[0])
2160 seek += cursec - sl[0];
2161 else
2162 seek += sl[0] - cursec;
2163 }
2164
2165 if (cursec > ((maxsec + minsec) / 2))
2166 rev = 1;
2167
2168 if (ioseek > ((maxsec - minsec) / 2))
2169 rev = 0;
2170
2171 if (!((rev && r) || (!rev && s)))
2172 sort(sl, il, n_ready, rev);
2173
2174 if (!input_only)
2175 for (n = 0; n < n_ready; n++) {
2176 k = il[n];
2177 cpp = &ha->cp[k];
2178 SCpnt = cpp->SCpnt;
2179 ll[n] = blk_rq_sectors(SCpnt->request);
2180 pl[n] = SCpnt->serial_number;
2181
2182 if (!n)
2183 continue;
2184
2185 if ((sl[n] == sl[n - 1])
2186 || (!rev && ((sl[n - 1] + ll[n - 1]) > sl[n]))
2187 || (rev && ((sl[n] + ll[n]) > sl[n - 1])))
2188 overlap = 1;
2189 }
2190
2191 if (overlap)
2192 sort(pl, il, n_ready, 0);
2193
2194 if (link_statistics) {
2195 if (cursec > sl[0])
2196 iseek = cursec - sl[0];
2197 else
2198 iseek = sl[0] - cursec;
2199 batchcount++;
2200 readycount += n_ready;
2201 seeknosort += seek / 1024;
2202 if (input_only)
2203 inputcount++;
2204 if (overlap) {
2205 ovlcount++;
2206 seeksorted += iseek / 1024;
2207 } else
2208 seeksorted += (iseek + maxsec - minsec) / 1024;
2209 if (rev && !r) {
2210 revcount++;
2211 readysorted += n_ready;
2212 }
2213 if (!rev && !s) {
2214 sortcount++;
2215 readysorted += n_ready;
2216 }
2217 }
2218 #if defined(DEBUG_LINKED_COMMANDS)
2219 if (link_statistics && (overlap || !(flushcount % link_statistics)))
2220 for (n = 0; n < n_ready; n++) {
2221 k = il[n];
2222 cpp = &ha->cp[k];
2223 SCpnt = cpp->SCpnt;
2224 scmd_printk(KERN_INFO, SCpnt,
2225 "%s mb %d fc %d nr %d sec %ld ns %u"
2226 " cur %ld s:%c r:%c rev:%c in:%c ov:%c xd %d.\n",
2227 (ihdlr ? "ihdlr" : "qcomm"),
2228 k, flushcount,
2229 n_ready, blk_rq_pos(SCpnt->request),
2230 blk_rq_sectors(SCpnt->request), cursec, YESNO(s),
2231 YESNO(r), YESNO(rev), YESNO(input_only),
2232 YESNO(overlap), cpp->din);
2233 }
2234 #endif
2235 return overlap;
2236 }
2237
2238 static void flush_dev(struct scsi_device *dev, unsigned long cursec,
2239 struct hostdata *ha, unsigned int ihdlr)
2240 {
2241 struct scsi_cmnd *SCpnt;
2242 struct mscp *cpp;
2243 unsigned int k, n, n_ready = 0, il[MAX_MAILBOXES];
2244
2245 for (k = 0; k < dev->host->can_queue; k++) {
2246
2247 if (ha->cp_stat[k] != READY && ha->cp_stat[k] != IN_USE)
2248 continue;
2249
2250 cpp = &ha->cp[k];
2251 SCpnt = cpp->SCpnt;
2252
2253 if (SCpnt->device != dev)
2254 continue;
2255
2256 if (ha->cp_stat[k] == IN_USE)
2257 return;
2258
2259 il[n_ready++] = k;
2260 }
2261
2262 if (reorder(ha, cursec, ihdlr, il, n_ready))
2263 n_ready = 1;
2264
2265 for (n = 0; n < n_ready; n++) {
2266 k = il[n];
2267 cpp = &ha->cp[k];
2268 SCpnt = cpp->SCpnt;
2269
2270 if (do_dma(dev->host->io_port, cpp->cp_dma_addr, SEND_CP_DMA)) {
2271 scmd_printk(KERN_INFO, SCpnt,
2272 "%s, mbox %d, adapter"
2273 " busy, will abort.\n",
2274 (ihdlr ? "ihdlr" : "qcomm"),
2275 k);
2276 ha->cp_stat[k] = ABORTING;
2277 continue;
2278 }
2279
2280 ha->cp_stat[k] = IN_USE;
2281 }
2282 }
2283
2284 static irqreturn_t ihdlr(struct Scsi_Host *shost)
2285 {
2286 struct scsi_cmnd *SCpnt;
2287 unsigned int i, k, c, status, tstatus, reg;
2288 struct mssp *spp;
2289 struct mscp *cpp;
2290 struct hostdata *ha = (struct hostdata *)shost->hostdata;
2291 int irq = shost->irq;
2292
2293 /* Check if this board need to be serviced */
2294 if (!(inb(shost->io_port + REG_AUX_STATUS) & IRQ_ASSERTED))
2295 goto none;
2296
2297 ha->iocount++;
2298
2299 if (do_trace)
2300 printk("%s: ihdlr, enter, irq %d, count %d.\n", ha->board_name, irq,
2301 ha->iocount);
2302
2303 /* Check if this board is still busy */
2304 if (wait_on_busy(shost->io_port, 20 * MAXLOOP)) {
2305 reg = inb(shost->io_port + REG_STATUS);
2306 printk
2307 ("%s: ihdlr, busy timeout error, irq %d, reg 0x%x, count %d.\n",
2308 ha->board_name, irq, reg, ha->iocount);
2309 goto none;
2310 }
2311
2312 spp = &ha->sp;
2313
2314 /* Make a local copy just before clearing the interrupt indication */
2315 memcpy(spp, ha->sp_cpu_addr, sizeof(struct mssp));
2316
2317 /* Clear the completion flag and cp pointer on the dynamic copy of sp */
2318 memset(ha->sp_cpu_addr, 0, sizeof(struct mssp));
2319
2320 /* Read the status register to clear the interrupt indication */
2321 reg = inb(shost->io_port + REG_STATUS);
2322
2323 #if defined (DEBUG_INTERRUPT)
2324 {
2325 unsigned char *bytesp;
2326 int cnt;
2327 bytesp = (unsigned char *)spp;
2328 if (ha->iocount < 200) {
2329 printk("sp[] =");
2330 for (cnt = 0; cnt < 15; cnt++)
2331 printk(" 0x%x", bytesp[cnt]);
2332 printk("\n");
2333 }
2334 }
2335 #endif
2336
2337 /* Reject any sp with supspect data */
2338 if (spp->eoc == 0 && ha->iocount > 1)
2339 printk
2340 ("%s: ihdlr, spp->eoc == 0, irq %d, reg 0x%x, count %d.\n",
2341 ha->board_name, irq, reg, ha->iocount);
2342 if (spp->cpp_index < 0 || spp->cpp_index >= shost->can_queue)
2343 printk
2344 ("%s: ihdlr, bad spp->cpp_index %d, irq %d, reg 0x%x, count %d.\n",
2345 ha->board_name, spp->cpp_index, irq, reg, ha->iocount);
2346 if (spp->eoc == 0 || spp->cpp_index < 0
2347 || spp->cpp_index >= shost->can_queue)
2348 goto handled;
2349
2350 /* Find the mailbox to be serviced on this board */
2351 i = spp->cpp_index;
2352
2353 cpp = &(ha->cp[i]);
2354
2355 #if defined(DEBUG_GENERATE_ABORTS)
2356 if ((ha->iocount > 500) && ((ha->iocount % 500) < 3))
2357 goto handled;
2358 #endif
2359
2360 if (ha->cp_stat[i] == IGNORE) {
2361 ha->cp_stat[i] = FREE;
2362 goto handled;
2363 } else if (ha->cp_stat[i] == LOCKED) {
2364 ha->cp_stat[i] = FREE;
2365 printk("%s: ihdlr, mbox %d unlocked, count %d.\n", ha->board_name, i,
2366 ha->iocount);
2367 goto handled;
2368 } else if (ha->cp_stat[i] == FREE) {
2369 printk("%s: ihdlr, mbox %d is free, count %d.\n", ha->board_name, i,
2370 ha->iocount);
2371 goto handled;
2372 } else if (ha->cp_stat[i] == IN_RESET)
2373 printk("%s: ihdlr, mbox %d is in reset.\n", ha->board_name, i);
2374 else if (ha->cp_stat[i] != IN_USE)
2375 panic("%s: ihdlr, mbox %d, invalid cp_stat: %d.\n",
2376 ha->board_name, i, ha->cp_stat[i]);
2377
2378 ha->cp_stat[i] = FREE;
2379 SCpnt = cpp->SCpnt;
2380
2381 if (SCpnt == NULL)
2382 panic("%s: ihdlr, mbox %d, SCpnt == NULL.\n", ha->board_name, i);
2383
2384 if (SCpnt->host_scribble == NULL)
2385 panic("%s: ihdlr, mbox %d, SCpnt %p garbled.\n", ha->board_name,
2386 i, SCpnt);
2387
2388 if (*(unsigned int *)SCpnt->host_scribble != i)
2389 panic("%s: ihdlr, mbox %d, index mismatch %d.\n",
2390 ha->board_name, i,
2391 *(unsigned int *)SCpnt->host_scribble);
2392
2393 sync_dma(i, ha);
2394
2395 if (linked_comm && SCpnt->device->queue_depth > 2
2396 && TLDEV(SCpnt->device->type))
2397 flush_dev(SCpnt->device, blk_rq_pos(SCpnt->request), ha, 1);
2398
2399 tstatus = status_byte(spp->target_status);
2400
2401 #if defined(DEBUG_GENERATE_ERRORS)
2402 if ((ha->iocount > 500) && ((ha->iocount % 200) < 2))
2403 spp->adapter_status = 0x01;
2404 #endif
2405
2406 switch (spp->adapter_status) {
2407 case ASOK: /* status OK */
2408
2409 /* Forces a reset if a disk drive keeps returning BUSY */
2410 if (tstatus == BUSY && SCpnt->device->type != TYPE_TAPE)
2411 status = DID_ERROR << 16;
2412
2413 /* If there was a bus reset, redo operation on each target */
2414 else if (tstatus != GOOD && SCpnt->device->type == TYPE_DISK
2415 && ha->target_redo[SCpnt->device->id][SCpnt->
2416 device->
2417 channel])
2418 status = DID_BUS_BUSY << 16;
2419
2420 /* Works around a flaw in scsi.c */
2421 else if (tstatus == CHECK_CONDITION
2422 && SCpnt->device->type == TYPE_DISK
2423 && (SCpnt->sense_buffer[2] & 0xf) == RECOVERED_ERROR)
2424 status = DID_BUS_BUSY << 16;
2425
2426 else
2427 status = DID_OK << 16;
2428
2429 if (tstatus == GOOD)
2430 ha->target_redo[SCpnt->device->id][SCpnt->device->
2431 channel] = 0;
2432
2433 if (spp->target_status && SCpnt->device->type == TYPE_DISK &&
2434 (!(tstatus == CHECK_CONDITION && ha->iocount <= 1000 &&
2435 (SCpnt->sense_buffer[2] & 0xf) == NOT_READY)))
2436 printk("%s: ihdlr, target %d.%d:%d, "
2437 "target_status 0x%x, sense key 0x%x.\n",
2438 ha->board_name,
2439 SCpnt->device->channel, SCpnt->device->id,
2440 (u8)SCpnt->device->lun,
2441 spp->target_status, SCpnt->sense_buffer[2]);
2442
2443 ha->target_to[SCpnt->device->id][SCpnt->device->channel] = 0;
2444
2445 if (ha->last_retried_pid == SCpnt->serial_number)
2446 ha->retries = 0;
2447
2448 break;
2449 case ASST: /* Selection Time Out */
2450 case 0x02: /* Command Time Out */
2451
2452 if (ha->target_to[SCpnt->device->id][SCpnt->device->channel] > 1)
2453 status = DID_ERROR << 16;
2454 else {
2455 status = DID_TIME_OUT << 16;
2456 ha->target_to[SCpnt->device->id][SCpnt->device->
2457 channel]++;
2458 }
2459
2460 break;
2461
2462 /* Perform a limited number of internal retries */
2463 case 0x03: /* SCSI Bus Reset Received */
2464 case 0x04: /* Initial Controller Power-up */
2465
2466 for (c = 0; c <= shost->max_channel; c++)
2467 for (k = 0; k < shost->max_id; k++)
2468 ha->target_redo[k][c] = 1;
2469
2470 if (SCpnt->device->type != TYPE_TAPE
2471 && ha->retries < MAX_INTERNAL_RETRIES) {
2472
2473 #if defined(DID_SOFT_ERROR)
2474 status = DID_SOFT_ERROR << 16;
2475 #else
2476 status = DID_BUS_BUSY << 16;
2477 #endif
2478
2479 ha->retries++;
2480 ha->last_retried_pid = SCpnt->serial_number;
2481 } else
2482 status = DID_ERROR << 16;
2483
2484 break;
2485 case 0x05: /* Unexpected Bus Phase */
2486 case 0x06: /* Unexpected Bus Free */
2487 case 0x07: /* Bus Parity Error */
2488 case 0x08: /* SCSI Hung */
2489 case 0x09: /* Unexpected Message Reject */
2490 case 0x0a: /* SCSI Bus Reset Stuck */
2491 case 0x0b: /* Auto Request-Sense Failed */
2492 case 0x0c: /* Controller Ram Parity Error */
2493 default:
2494 status = DID_ERROR << 16;
2495 break;
2496 }
2497
2498 SCpnt->result = status | spp->target_status;
2499
2500 #if defined(DEBUG_INTERRUPT)
2501 if (SCpnt->result || do_trace)
2502 #else
2503 if ((spp->adapter_status != ASOK && ha->iocount > 1000) ||
2504 (spp->adapter_status != ASOK &&
2505 spp->adapter_status != ASST && ha->iocount <= 1000) ||
2506 do_trace || msg_byte(spp->target_status))
2507 #endif
2508 scmd_printk(KERN_INFO, SCpnt, "ihdlr, mbox %2d, err 0x%x:%x,"
2509 " reg 0x%x, count %d.\n",
2510 i, spp->adapter_status, spp->target_status,
2511 reg, ha->iocount);
2512
2513 unmap_dma(i, ha);
2514
2515 /* Set the command state to inactive */
2516 SCpnt->host_scribble = NULL;
2517
2518 SCpnt->scsi_done(SCpnt);
2519
2520 if (do_trace)
2521 printk("%s: ihdlr, exit, irq %d, count %d.\n", ha->board_name,
2522 irq, ha->iocount);
2523
2524 handled:
2525 return IRQ_HANDLED;
2526 none:
2527 return IRQ_NONE;
2528 }
2529
2530 static irqreturn_t do_interrupt_handler(int dummy, void *shap)
2531 {
2532 struct Scsi_Host *shost;
2533 unsigned int j;
2534 unsigned long spin_flags;
2535 irqreturn_t ret;
2536
2537 /* Check if the interrupt must be processed by this handler */
2538 if ((j = (unsigned int)((char *)shap - sha)) >= num_boards)
2539 return IRQ_NONE;
2540 shost = sh[j];
2541
2542 spin_lock_irqsave(shost->host_lock, spin_flags);
2543 ret = ihdlr(shost);
2544 spin_unlock_irqrestore(shost->host_lock, spin_flags);
2545 return ret;
2546 }
2547
2548 static int eata2x_release(struct Scsi_Host *shost)
2549 {
2550 struct hostdata *ha = (struct hostdata *)shost->hostdata;
2551 unsigned int i;
2552
2553 for (i = 0; i < shost->can_queue; i++)
2554 kfree((&ha->cp[i])->sglist);
2555
2556 for (i = 0; i < shost->can_queue; i++)
2557 pci_unmap_single(ha->pdev, ha->cp[i].cp_dma_addr,
2558 sizeof(struct mscp), PCI_DMA_BIDIRECTIONAL);
2559
2560 if (ha->sp_cpu_addr)
2561 pci_free_consistent(ha->pdev, sizeof(struct mssp),
2562 ha->sp_cpu_addr, ha->sp_dma_addr);
2563
2564 free_irq(shost->irq, &sha[ha->board_number]);
2565
2566 if (shost->dma_channel != NO_DMA)
2567 free_dma(shost->dma_channel);
2568
2569 release_region(shost->io_port, shost->n_io_port);
2570 scsi_unregister(shost);
2571 return 0;
2572 }
2573
2574 #include "scsi_module.c"
2575
2576 #ifndef MODULE
2577 __setup("eata=", option_setup);
2578 #endif /* end MODULE */
Linux with added FPC-III support