Root/
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 | 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_BIT_MASK(32))) |
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 | if (!scsi_sg_count(SCpnt)) { |
1630 | cpp->data_len = 0; |
1631 | return; |
1632 | } |
1633 | |
1634 | count = pci_map_sg(ha->pdev, scsi_sglist(SCpnt), scsi_sg_count(SCpnt), |
1635 | pci_dir); |
1636 | BUG_ON(!count); |
1637 | |
1638 | scsi_for_each_sg(SCpnt, sg, count, k) { |
1639 | cpp->sglist[k].address = H2DEV(sg_dma_address(sg)); |
1640 | cpp->sglist[k].num_bytes = H2DEV(sg_dma_len(sg)); |
1641 | } |
1642 | |
1643 | cpp->sg = 1; |
1644 | cpp->data_address = H2DEV(pci_map_single(ha->pdev, cpp->sglist, |
1645 | scsi_sg_count(SCpnt) * |
1646 | sizeof(struct sg_list), |
1647 | pci_dir)); |
1648 | cpp->data_len = H2DEV((scsi_sg_count(SCpnt) * sizeof(struct sg_list))); |
1649 | } |
1650 | |
1651 | static void unmap_dma(unsigned int i, struct hostdata *ha) |
1652 | { |
1653 | unsigned int pci_dir; |
1654 | struct mscp *cpp; |
1655 | struct scsi_cmnd *SCpnt; |
1656 | |
1657 | cpp = &ha->cp[i]; |
1658 | SCpnt = cpp->SCpnt; |
1659 | pci_dir = SCpnt->sc_data_direction; |
1660 | |
1661 | if (DEV2H(cpp->sense_addr)) |
1662 | pci_unmap_single(ha->pdev, DEV2H(cpp->sense_addr), |
1663 | DEV2H(cpp->sense_len), PCI_DMA_FROMDEVICE); |
1664 | |
1665 | if (scsi_sg_count(SCpnt)) |
1666 | pci_unmap_sg(ha->pdev, scsi_sglist(SCpnt), scsi_sg_count(SCpnt), |
1667 | pci_dir); |
1668 | |
1669 | if (!DEV2H(cpp->data_len)) |
1670 | pci_dir = PCI_DMA_BIDIRECTIONAL; |
1671 | |
1672 | if (DEV2H(cpp->data_address)) |
1673 | pci_unmap_single(ha->pdev, DEV2H(cpp->data_address), |
1674 | DEV2H(cpp->data_len), pci_dir); |
1675 | } |
1676 | |
1677 | static void sync_dma(unsigned int i, struct hostdata *ha) |
1678 | { |
1679 | unsigned int pci_dir; |
1680 | struct mscp *cpp; |
1681 | struct scsi_cmnd *SCpnt; |
1682 | |
1683 | cpp = &ha->cp[i]; |
1684 | SCpnt = cpp->SCpnt; |
1685 | pci_dir = SCpnt->sc_data_direction; |
1686 | |
1687 | if (DEV2H(cpp->sense_addr)) |
1688 | pci_dma_sync_single_for_cpu(ha->pdev, DEV2H(cpp->sense_addr), |
1689 | DEV2H(cpp->sense_len), |
1690 | PCI_DMA_FROMDEVICE); |
1691 | |
1692 | if (scsi_sg_count(SCpnt)) |
1693 | pci_dma_sync_sg_for_cpu(ha->pdev, scsi_sglist(SCpnt), |
1694 | scsi_sg_count(SCpnt), pci_dir); |
1695 | |
1696 | if (!DEV2H(cpp->data_len)) |
1697 | pci_dir = PCI_DMA_BIDIRECTIONAL; |
1698 | |
1699 | if (DEV2H(cpp->data_address)) |
1700 | pci_dma_sync_single_for_cpu(ha->pdev, |
1701 | DEV2H(cpp->data_address), |
1702 | DEV2H(cpp->data_len), pci_dir); |
1703 | } |
1704 | |
1705 | static void scsi_to_dev_dir(unsigned int i, struct hostdata *ha) |
1706 | { |
1707 | unsigned int k; |
1708 | |
1709 | static const unsigned char data_out_cmds[] = { |
1710 | 0x0a, 0x2a, 0x15, 0x55, 0x04, 0x07, 0x18, 0x1d, 0x24, 0x2e, |
1711 | 0x30, 0x31, 0x32, 0x38, 0x39, 0x3a, 0x3b, 0x3d, 0x3f, 0x40, |
1712 | 0x41, 0x4c, 0xaa, 0xae, 0xb0, 0xb1, 0xb2, 0xb6, 0xea, 0x1b, 0x5d |
1713 | }; |
1714 | |
1715 | static const unsigned char data_none_cmds[] = { |
1716 | 0x01, 0x0b, 0x10, 0x11, 0x13, 0x16, 0x17, 0x19, 0x2b, 0x1e, |
1717 | 0x2c, 0xac, 0x2f, 0xaf, 0x33, 0xb3, 0x35, 0x36, 0x45, 0x47, |
1718 | 0x48, 0x49, 0xa9, 0x4b, 0xa5, 0xa6, 0xb5, 0x00 |
1719 | }; |
1720 | |
1721 | struct mscp *cpp; |
1722 | struct scsi_cmnd *SCpnt; |
1723 | |
1724 | cpp = &ha->cp[i]; |
1725 | SCpnt = cpp->SCpnt; |
1726 | |
1727 | if (SCpnt->sc_data_direction == DMA_FROM_DEVICE) { |
1728 | cpp->din = 1; |
1729 | cpp->dout = 0; |
1730 | return; |
1731 | } else if (SCpnt->sc_data_direction == DMA_TO_DEVICE) { |
1732 | cpp->din = 0; |
1733 | cpp->dout = 1; |
1734 | return; |
1735 | } else if (SCpnt->sc_data_direction == DMA_NONE) { |
1736 | cpp->din = 0; |
1737 | cpp->dout = 0; |
1738 | return; |
1739 | } |
1740 | |
1741 | if (SCpnt->sc_data_direction != DMA_BIDIRECTIONAL) |
1742 | panic("%s: qcomm, invalid SCpnt->sc_data_direction.\n", |
1743 | ha->board_name); |
1744 | |
1745 | for (k = 0; k < ARRAY_SIZE(data_out_cmds); k++) |
1746 | if (SCpnt->cmnd[0] == data_out_cmds[k]) { |
1747 | cpp->dout = 1; |
1748 | break; |
1749 | } |
1750 | |
1751 | if ((cpp->din = !cpp->dout)) |
1752 | for (k = 0; k < ARRAY_SIZE(data_none_cmds); k++) |
1753 | if (SCpnt->cmnd[0] == data_none_cmds[k]) { |
1754 | cpp->din = 0; |
1755 | break; |
1756 | } |
1757 | |
1758 | } |
1759 | |
1760 | static int eata2x_queuecommand_lck(struct scsi_cmnd *SCpnt, |
1761 | void (*done) (struct scsi_cmnd *)) |
1762 | { |
1763 | struct Scsi_Host *shost = SCpnt->device->host; |
1764 | struct hostdata *ha = (struct hostdata *)shost->hostdata; |
1765 | unsigned int i, k; |
1766 | struct mscp *cpp; |
1767 | |
1768 | if (SCpnt->host_scribble) |
1769 | panic("%s: qcomm, SCpnt %p already active.\n", |
1770 | ha->board_name, SCpnt); |
1771 | |
1772 | /* i is the mailbox number, look for the first free mailbox |
1773 | starting from last_cp_used */ |
1774 | i = ha->last_cp_used + 1; |
1775 | |
1776 | for (k = 0; k < shost->can_queue; k++, i++) { |
1777 | if (i >= shost->can_queue) |
1778 | i = 0; |
1779 | if (ha->cp_stat[i] == FREE) { |
1780 | ha->last_cp_used = i; |
1781 | break; |
1782 | } |
1783 | } |
1784 | |
1785 | if (k == shost->can_queue) { |
1786 | printk("%s: qcomm, no free mailbox.\n", ha->board_name); |
1787 | return 1; |
1788 | } |
1789 | |
1790 | /* Set pointer to control packet structure */ |
1791 | cpp = &ha->cp[i]; |
1792 | |
1793 | memset(cpp, 0, sizeof(struct mscp) - CP_TAIL_SIZE); |
1794 | |
1795 | /* Set pointer to status packet structure, Big Endian format */ |
1796 | cpp->sp_dma_addr = H2DEV(ha->sp_dma_addr); |
1797 | |
1798 | SCpnt->scsi_done = done; |
1799 | cpp->cpp_index = i; |
1800 | SCpnt->host_scribble = (unsigned char *)&cpp->cpp_index; |
1801 | |
1802 | if (do_trace) |
1803 | scmd_printk(KERN_INFO, SCpnt, |
1804 | "qcomm, mbox %d.\n", i); |
1805 | |
1806 | cpp->reqsen = 1; |
1807 | cpp->dispri = 1; |
1808 | #if 0 |
1809 | if (SCpnt->device->type == TYPE_TAPE) |
1810 | cpp->hbaci = 1; |
1811 | #endif |
1812 | cpp->one = 1; |
1813 | cpp->channel = SCpnt->device->channel; |
1814 | cpp->target = SCpnt->device->id; |
1815 | cpp->lun = SCpnt->device->lun; |
1816 | cpp->SCpnt = SCpnt; |
1817 | memcpy(cpp->cdb, SCpnt->cmnd, SCpnt->cmd_len); |
1818 | |
1819 | /* Use data transfer direction SCpnt->sc_data_direction */ |
1820 | scsi_to_dev_dir(i, ha); |
1821 | |
1822 | /* Map DMA buffers and SG list */ |
1823 | map_dma(i, ha); |
1824 | |
1825 | if (linked_comm && SCpnt->device->queue_depth > 2 |
1826 | && TLDEV(SCpnt->device->type)) { |
1827 | ha->cp_stat[i] = READY; |
1828 | flush_dev(SCpnt->device, blk_rq_pos(SCpnt->request), ha, 0); |
1829 | return 0; |
1830 | } |
1831 | |
1832 | /* Send control packet to the board */ |
1833 | if (do_dma(shost->io_port, cpp->cp_dma_addr, SEND_CP_DMA)) { |
1834 | unmap_dma(i, ha); |
1835 | SCpnt->host_scribble = NULL; |
1836 | scmd_printk(KERN_INFO, SCpnt, "qcomm, adapter busy.\n"); |
1837 | return 1; |
1838 | } |
1839 | |
1840 | ha->cp_stat[i] = IN_USE; |
1841 | return 0; |
1842 | } |
1843 | |
1844 | static DEF_SCSI_QCMD(eata2x_queuecommand) |
1845 | |
1846 | static int eata2x_eh_abort(struct scsi_cmnd *SCarg) |
1847 | { |
1848 | struct Scsi_Host *shost = SCarg->device->host; |
1849 | struct hostdata *ha = (struct hostdata *)shost->hostdata; |
1850 | unsigned int i; |
1851 | |
1852 | if (SCarg->host_scribble == NULL) { |
1853 | scmd_printk(KERN_INFO, SCarg, "abort, cmd inactive.\n"); |
1854 | return SUCCESS; |
1855 | } |
1856 | |
1857 | i = *(unsigned int *)SCarg->host_scribble; |
1858 | scmd_printk(KERN_WARNING, SCarg, "abort, mbox %d.\n", i); |
1859 | |
1860 | if (i >= shost->can_queue) |
1861 | panic("%s: abort, invalid SCarg->host_scribble.\n", ha->board_name); |
1862 | |
1863 | if (wait_on_busy(shost->io_port, MAXLOOP)) { |
1864 | printk("%s: abort, timeout error.\n", ha->board_name); |
1865 | return FAILED; |
1866 | } |
1867 | |
1868 | if (ha->cp_stat[i] == FREE) { |
1869 | printk("%s: abort, mbox %d is free.\n", ha->board_name, i); |
1870 | return SUCCESS; |
1871 | } |
1872 | |
1873 | if (ha->cp_stat[i] == IN_USE) { |
1874 | printk("%s: abort, mbox %d is in use.\n", ha->board_name, i); |
1875 | |
1876 | if (SCarg != ha->cp[i].SCpnt) |
1877 | panic("%s: abort, mbox %d, SCarg %p, cp SCpnt %p.\n", |
1878 | ha->board_name, i, SCarg, ha->cp[i].SCpnt); |
1879 | |
1880 | if (inb(shost->io_port + REG_AUX_STATUS) & IRQ_ASSERTED) |
1881 | printk("%s: abort, mbox %d, interrupt pending.\n", |
1882 | ha->board_name, i); |
1883 | |
1884 | return FAILED; |
1885 | } |
1886 | |
1887 | if (ha->cp_stat[i] == IN_RESET) { |
1888 | printk("%s: abort, mbox %d is in reset.\n", ha->board_name, i); |
1889 | return FAILED; |
1890 | } |
1891 | |
1892 | if (ha->cp_stat[i] == LOCKED) { |
1893 | printk("%s: abort, mbox %d is locked.\n", ha->board_name, i); |
1894 | return SUCCESS; |
1895 | } |
1896 | |
1897 | if (ha->cp_stat[i] == READY || ha->cp_stat[i] == ABORTING) { |
1898 | unmap_dma(i, ha); |
1899 | SCarg->result = DID_ABORT << 16; |
1900 | SCarg->host_scribble = NULL; |
1901 | ha->cp_stat[i] = FREE; |
1902 | printk("%s, abort, mbox %d ready, DID_ABORT, done.\n", |
1903 | ha->board_name, i); |
1904 | SCarg->scsi_done(SCarg); |
1905 | return SUCCESS; |
1906 | } |
1907 | |
1908 | panic("%s: abort, mbox %d, invalid cp_stat.\n", ha->board_name, i); |
1909 | } |
1910 | |
1911 | static int eata2x_eh_host_reset(struct scsi_cmnd *SCarg) |
1912 | { |
1913 | unsigned int i, time, k, c, limit = 0; |
1914 | int arg_done = 0; |
1915 | struct scsi_cmnd *SCpnt; |
1916 | struct Scsi_Host *shost = SCarg->device->host; |
1917 | struct hostdata *ha = (struct hostdata *)shost->hostdata; |
1918 | |
1919 | scmd_printk(KERN_INFO, SCarg, "reset, enter.\n"); |
1920 | |
1921 | spin_lock_irq(shost->host_lock); |
1922 | |
1923 | if (SCarg->host_scribble == NULL) |
1924 | printk("%s: reset, inactive.\n", ha->board_name); |
1925 | |
1926 | if (ha->in_reset) { |
1927 | printk("%s: reset, exit, already in reset.\n", ha->board_name); |
1928 | spin_unlock_irq(shost->host_lock); |
1929 | return FAILED; |
1930 | } |
1931 | |
1932 | if (wait_on_busy(shost->io_port, MAXLOOP)) { |
1933 | printk("%s: reset, exit, timeout error.\n", ha->board_name); |
1934 | spin_unlock_irq(shost->host_lock); |
1935 | return FAILED; |
1936 | } |
1937 | |
1938 | ha->retries = 0; |
1939 | |
1940 | for (c = 0; c <= shost->max_channel; c++) |
1941 | for (k = 0; k < shost->max_id; k++) { |
1942 | ha->target_redo[k][c] = 1; |
1943 | ha->target_to[k][c] = 0; |
1944 | } |
1945 | |
1946 | for (i = 0; i < shost->can_queue; i++) { |
1947 | |
1948 | if (ha->cp_stat[i] == FREE) |
1949 | continue; |
1950 | |
1951 | if (ha->cp_stat[i] == LOCKED) { |
1952 | ha->cp_stat[i] = FREE; |
1953 | printk("%s: reset, locked mbox %d forced free.\n", |
1954 | ha->board_name, i); |
1955 | continue; |
1956 | } |
1957 | |
1958 | if (!(SCpnt = ha->cp[i].SCpnt)) |
1959 | panic("%s: reset, mbox %d, SCpnt == NULL.\n", ha->board_name, i); |
1960 | |
1961 | if (ha->cp_stat[i] == READY || ha->cp_stat[i] == ABORTING) { |
1962 | ha->cp_stat[i] = ABORTING; |
1963 | printk("%s: reset, mbox %d aborting.\n", |
1964 | ha->board_name, i); |
1965 | } |
1966 | |
1967 | else { |
1968 | ha->cp_stat[i] = IN_RESET; |
1969 | printk("%s: reset, mbox %d in reset.\n", |
1970 | ha->board_name, i); |
1971 | } |
1972 | |
1973 | if (SCpnt->host_scribble == NULL) |
1974 | panic("%s: reset, mbox %d, garbled SCpnt.\n", ha->board_name, i); |
1975 | |
1976 | if (*(unsigned int *)SCpnt->host_scribble != i) |
1977 | panic("%s: reset, mbox %d, index mismatch.\n", ha->board_name, i); |
1978 | |
1979 | if (SCpnt->scsi_done == NULL) |
1980 | panic("%s: reset, mbox %d, SCpnt->scsi_done == NULL.\n", |
1981 | ha->board_name, i); |
1982 | |
1983 | if (SCpnt == SCarg) |
1984 | arg_done = 1; |
1985 | } |
1986 | |
1987 | if (do_dma(shost->io_port, 0, RESET_PIO)) { |
1988 | printk("%s: reset, cannot reset, timeout error.\n", ha->board_name); |
1989 | spin_unlock_irq(shost->host_lock); |
1990 | return FAILED; |
1991 | } |
1992 | |
1993 | printk("%s: reset, board reset done, enabling interrupts.\n", ha->board_name); |
1994 | |
1995 | #if defined(DEBUG_RESET) |
1996 | do_trace = 1; |
1997 | #endif |
1998 | |
1999 | ha->in_reset = 1; |
2000 | |
2001 | spin_unlock_irq(shost->host_lock); |
2002 | |
2003 | /* FIXME: use a sleep instead */ |
2004 | time = jiffies; |
2005 | while ((jiffies - time) < (10 * HZ) && limit++ < 200000) |
2006 | udelay(100L); |
2007 | |
2008 | spin_lock_irq(shost->host_lock); |
2009 | |
2010 | printk("%s: reset, interrupts disabled, loops %d.\n", ha->board_name, limit); |
2011 | |
2012 | for (i = 0; i < shost->can_queue; i++) { |
2013 | |
2014 | if (ha->cp_stat[i] == IN_RESET) { |
2015 | SCpnt = ha->cp[i].SCpnt; |
2016 | unmap_dma(i, ha); |
2017 | SCpnt->result = DID_RESET << 16; |
2018 | SCpnt->host_scribble = NULL; |
2019 | |
2020 | /* This mailbox is still waiting for its interrupt */ |
2021 | ha->cp_stat[i] = LOCKED; |
2022 | |
2023 | printk |
2024 | ("%s, reset, mbox %d locked, DID_RESET, done.\n", |
2025 | ha->board_name, i); |
2026 | } |
2027 | |
2028 | else if (ha->cp_stat[i] == ABORTING) { |
2029 | SCpnt = ha->cp[i].SCpnt; |
2030 | unmap_dma(i, ha); |
2031 | SCpnt->result = DID_RESET << 16; |
2032 | SCpnt->host_scribble = NULL; |
2033 | |
2034 | /* This mailbox was never queued to the adapter */ |
2035 | ha->cp_stat[i] = FREE; |
2036 | |
2037 | printk |
2038 | ("%s, reset, mbox %d aborting, DID_RESET, done.\n", |
2039 | ha->board_name, i); |
2040 | } |
2041 | |
2042 | else |
2043 | /* Any other mailbox has already been set free by interrupt */ |
2044 | continue; |
2045 | |
2046 | SCpnt->scsi_done(SCpnt); |
2047 | } |
2048 | |
2049 | ha->in_reset = 0; |
2050 | do_trace = 0; |
2051 | |
2052 | if (arg_done) |
2053 | printk("%s: reset, exit, done.\n", ha->board_name); |
2054 | else |
2055 | printk("%s: reset, exit.\n", ha->board_name); |
2056 | |
2057 | spin_unlock_irq(shost->host_lock); |
2058 | return SUCCESS; |
2059 | } |
2060 | |
2061 | int eata2x_bios_param(struct scsi_device *sdev, struct block_device *bdev, |
2062 | sector_t capacity, int *dkinfo) |
2063 | { |
2064 | unsigned int size = capacity; |
2065 | |
2066 | if (ext_tran || (scsicam_bios_param(bdev, capacity, dkinfo) < 0)) { |
2067 | dkinfo[0] = 255; |
2068 | dkinfo[1] = 63; |
2069 | dkinfo[2] = size / (dkinfo[0] * dkinfo[1]); |
2070 | } |
2071 | #if defined (DEBUG_GEOMETRY) |
2072 | printk("%s: bios_param, head=%d, sec=%d, cyl=%d.\n", driver_name, |
2073 | dkinfo[0], dkinfo[1], dkinfo[2]); |
2074 | #endif |
2075 | |
2076 | return 0; |
2077 | } |
2078 | |
2079 | static void sort(unsigned long sk[], unsigned int da[], unsigned int n, |
2080 | unsigned int rev) |
2081 | { |
2082 | unsigned int i, j, k, y; |
2083 | unsigned long x; |
2084 | |
2085 | for (i = 0; i < n - 1; i++) { |
2086 | k = i; |
2087 | |
2088 | for (j = k + 1; j < n; j++) |
2089 | if (rev) { |
2090 | if (sk[j] > sk[k]) |
2091 | k = j; |
2092 | } else { |
2093 | if (sk[j] < sk[k]) |
2094 | k = j; |
2095 | } |
2096 | |
2097 | if (k != i) { |
2098 | x = sk[k]; |
2099 | sk[k] = sk[i]; |
2100 | sk[i] = x; |
2101 | y = da[k]; |
2102 | da[k] = da[i]; |
2103 | da[i] = y; |
2104 | } |
2105 | } |
2106 | |
2107 | return; |
2108 | } |
2109 | |
2110 | static int reorder(struct hostdata *ha, unsigned long cursec, |
2111 | unsigned int ihdlr, unsigned int il[], unsigned int n_ready) |
2112 | { |
2113 | struct scsi_cmnd *SCpnt; |
2114 | struct mscp *cpp; |
2115 | unsigned int k, n; |
2116 | unsigned int rev = 0, s = 1, r = 1; |
2117 | unsigned int input_only = 1, overlap = 0; |
2118 | unsigned long sl[n_ready], pl[n_ready], ll[n_ready]; |
2119 | unsigned long maxsec = 0, minsec = ULONG_MAX, seek = 0, iseek = 0; |
2120 | unsigned long ioseek = 0; |
2121 | |
2122 | static unsigned int flushcount = 0, batchcount = 0, sortcount = 0; |
2123 | static unsigned int readycount = 0, ovlcount = 0, inputcount = 0; |
2124 | static unsigned int readysorted = 0, revcount = 0; |
2125 | static unsigned long seeksorted = 0, seeknosort = 0; |
2126 | |
2127 | if (link_statistics && !(++flushcount % link_statistics)) |
2128 | printk("fc %d bc %d ic %d oc %d rc %d rs %d sc %d re %d" |
2129 | " av %ldK as %ldK.\n", flushcount, batchcount, |
2130 | inputcount, ovlcount, readycount, readysorted, sortcount, |
2131 | revcount, seeknosort / (readycount + 1), |
2132 | seeksorted / (readycount + 1)); |
2133 | |
2134 | if (n_ready <= 1) |
2135 | return 0; |
2136 | |
2137 | for (n = 0; n < n_ready; n++) { |
2138 | k = il[n]; |
2139 | cpp = &ha->cp[k]; |
2140 | SCpnt = cpp->SCpnt; |
2141 | |
2142 | if (!cpp->din) |
2143 | input_only = 0; |
2144 | |
2145 | if (blk_rq_pos(SCpnt->request) < minsec) |
2146 | minsec = blk_rq_pos(SCpnt->request); |
2147 | if (blk_rq_pos(SCpnt->request) > maxsec) |
2148 | maxsec = blk_rq_pos(SCpnt->request); |
2149 | |
2150 | sl[n] = blk_rq_pos(SCpnt->request); |
2151 | ioseek += blk_rq_sectors(SCpnt->request); |
2152 | |
2153 | if (!n) |
2154 | continue; |
2155 | |
2156 | if (sl[n] < sl[n - 1]) |
2157 | s = 0; |
2158 | if (sl[n] > sl[n - 1]) |
2159 | r = 0; |
2160 | |
2161 | if (link_statistics) { |
2162 | if (sl[n] > sl[n - 1]) |
2163 | seek += sl[n] - sl[n - 1]; |
2164 | else |
2165 | seek += sl[n - 1] - sl[n]; |
2166 | } |
2167 | |
2168 | } |
2169 | |
2170 | if (link_statistics) { |
2171 | if (cursec > sl[0]) |
2172 | seek += cursec - sl[0]; |
2173 | else |
2174 | seek += sl[0] - cursec; |
2175 | } |
2176 | |
2177 | if (cursec > ((maxsec + minsec) / 2)) |
2178 | rev = 1; |
2179 | |
2180 | if (ioseek > ((maxsec - minsec) / 2)) |
2181 | rev = 0; |
2182 | |
2183 | if (!((rev && r) || (!rev && s))) |
2184 | sort(sl, il, n_ready, rev); |
2185 | |
2186 | if (!input_only) |
2187 | for (n = 0; n < n_ready; n++) { |
2188 | k = il[n]; |
2189 | cpp = &ha->cp[k]; |
2190 | SCpnt = cpp->SCpnt; |
2191 | ll[n] = blk_rq_sectors(SCpnt->request); |
2192 | pl[n] = SCpnt->serial_number; |
2193 | |
2194 | if (!n) |
2195 | continue; |
2196 | |
2197 | if ((sl[n] == sl[n - 1]) |
2198 | || (!rev && ((sl[n - 1] + ll[n - 1]) > sl[n])) |
2199 | || (rev && ((sl[n] + ll[n]) > sl[n - 1]))) |
2200 | overlap = 1; |
2201 | } |
2202 | |
2203 | if (overlap) |
2204 | sort(pl, il, n_ready, 0); |
2205 | |
2206 | if (link_statistics) { |
2207 | if (cursec > sl[0]) |
2208 | iseek = cursec - sl[0]; |
2209 | else |
2210 | iseek = sl[0] - cursec; |
2211 | batchcount++; |
2212 | readycount += n_ready; |
2213 | seeknosort += seek / 1024; |
2214 | if (input_only) |
2215 | inputcount++; |
2216 | if (overlap) { |
2217 | ovlcount++; |
2218 | seeksorted += iseek / 1024; |
2219 | } else |
2220 | seeksorted += (iseek + maxsec - minsec) / 1024; |
2221 | if (rev && !r) { |
2222 | revcount++; |
2223 | readysorted += n_ready; |
2224 | } |
2225 | if (!rev && !s) { |
2226 | sortcount++; |
2227 | readysorted += n_ready; |
2228 | } |
2229 | } |
2230 | #if defined(DEBUG_LINKED_COMMANDS) |
2231 | if (link_statistics && (overlap || !(flushcount % link_statistics))) |
2232 | for (n = 0; n < n_ready; n++) { |
2233 | k = il[n]; |
2234 | cpp = &ha->cp[k]; |
2235 | SCpnt = cpp->SCpnt; |
2236 | scmd_printk(KERN_INFO, SCpnt, |
2237 | "%s mb %d fc %d nr %d sec %ld ns %u" |
2238 | " cur %ld s:%c r:%c rev:%c in:%c ov:%c xd %d.\n", |
2239 | (ihdlr ? "ihdlr" : "qcomm"), |
2240 | k, flushcount, |
2241 | n_ready, blk_rq_pos(SCpnt->request), |
2242 | blk_rq_sectors(SCpnt->request), cursec, YESNO(s), |
2243 | YESNO(r), YESNO(rev), YESNO(input_only), |
2244 | YESNO(overlap), cpp->din); |
2245 | } |
2246 | #endif |
2247 | return overlap; |
2248 | } |
2249 | |
2250 | static void flush_dev(struct scsi_device *dev, unsigned long cursec, |
2251 | struct hostdata *ha, unsigned int ihdlr) |
2252 | { |
2253 | struct scsi_cmnd *SCpnt; |
2254 | struct mscp *cpp; |
2255 | unsigned int k, n, n_ready = 0, il[MAX_MAILBOXES]; |
2256 | |
2257 | for (k = 0; k < dev->host->can_queue; k++) { |
2258 | |
2259 | if (ha->cp_stat[k] != READY && ha->cp_stat[k] != IN_USE) |
2260 | continue; |
2261 | |
2262 | cpp = &ha->cp[k]; |
2263 | SCpnt = cpp->SCpnt; |
2264 | |
2265 | if (SCpnt->device != dev) |
2266 | continue; |
2267 | |
2268 | if (ha->cp_stat[k] == IN_USE) |
2269 | return; |
2270 | |
2271 | il[n_ready++] = k; |
2272 | } |
2273 | |
2274 | if (reorder(ha, cursec, ihdlr, il, n_ready)) |
2275 | n_ready = 1; |
2276 | |
2277 | for (n = 0; n < n_ready; n++) { |
2278 | k = il[n]; |
2279 | cpp = &ha->cp[k]; |
2280 | SCpnt = cpp->SCpnt; |
2281 | |
2282 | if (do_dma(dev->host->io_port, cpp->cp_dma_addr, SEND_CP_DMA)) { |
2283 | scmd_printk(KERN_INFO, SCpnt, |
2284 | "%s, mbox %d, adapter" |
2285 | " busy, will abort.\n", |
2286 | (ihdlr ? "ihdlr" : "qcomm"), |
2287 | k); |
2288 | ha->cp_stat[k] = ABORTING; |
2289 | continue; |
2290 | } |
2291 | |
2292 | ha->cp_stat[k] = IN_USE; |
2293 | } |
2294 | } |
2295 | |
2296 | static irqreturn_t ihdlr(struct Scsi_Host *shost) |
2297 | { |
2298 | struct scsi_cmnd *SCpnt; |
2299 | unsigned int i, k, c, status, tstatus, reg; |
2300 | struct mssp *spp; |
2301 | struct mscp *cpp; |
2302 | struct hostdata *ha = (struct hostdata *)shost->hostdata; |
2303 | int irq = shost->irq; |
2304 | |
2305 | /* Check if this board need to be serviced */ |
2306 | if (!(inb(shost->io_port + REG_AUX_STATUS) & IRQ_ASSERTED)) |
2307 | goto none; |
2308 | |
2309 | ha->iocount++; |
2310 | |
2311 | if (do_trace) |
2312 | printk("%s: ihdlr, enter, irq %d, count %d.\n", ha->board_name, irq, |
2313 | ha->iocount); |
2314 | |
2315 | /* Check if this board is still busy */ |
2316 | if (wait_on_busy(shost->io_port, 20 * MAXLOOP)) { |
2317 | reg = inb(shost->io_port + REG_STATUS); |
2318 | printk |
2319 | ("%s: ihdlr, busy timeout error, irq %d, reg 0x%x, count %d.\n", |
2320 | ha->board_name, irq, reg, ha->iocount); |
2321 | goto none; |
2322 | } |
2323 | |
2324 | spp = &ha->sp; |
2325 | |
2326 | /* Make a local copy just before clearing the interrupt indication */ |
2327 | memcpy(spp, ha->sp_cpu_addr, sizeof(struct mssp)); |
2328 | |
2329 | /* Clear the completion flag and cp pointer on the dynamic copy of sp */ |
2330 | memset(ha->sp_cpu_addr, 0, sizeof(struct mssp)); |
2331 | |
2332 | /* Read the status register to clear the interrupt indication */ |
2333 | reg = inb(shost->io_port + REG_STATUS); |
2334 | |
2335 | #if defined (DEBUG_INTERRUPT) |
2336 | { |
2337 | unsigned char *bytesp; |
2338 | int cnt; |
2339 | bytesp = (unsigned char *)spp; |
2340 | if (ha->iocount < 200) { |
2341 | printk("sp[] ="); |
2342 | for (cnt = 0; cnt < 15; cnt++) |
2343 | printk(" 0x%x", bytesp[cnt]); |
2344 | printk("\n"); |
2345 | } |
2346 | } |
2347 | #endif |
2348 | |
2349 | /* Reject any sp with supspect data */ |
2350 | if (spp->eoc == 0 && ha->iocount > 1) |
2351 | printk |
2352 | ("%s: ihdlr, spp->eoc == 0, irq %d, reg 0x%x, count %d.\n", |
2353 | ha->board_name, irq, reg, ha->iocount); |
2354 | if (spp->cpp_index < 0 || spp->cpp_index >= shost->can_queue) |
2355 | printk |
2356 | ("%s: ihdlr, bad spp->cpp_index %d, irq %d, reg 0x%x, count %d.\n", |
2357 | ha->board_name, spp->cpp_index, irq, reg, ha->iocount); |
2358 | if (spp->eoc == 0 || spp->cpp_index < 0 |
2359 | || spp->cpp_index >= shost->can_queue) |
2360 | goto handled; |
2361 | |
2362 | /* Find the mailbox to be serviced on this board */ |
2363 | i = spp->cpp_index; |
2364 | |
2365 | cpp = &(ha->cp[i]); |
2366 | |
2367 | #if defined(DEBUG_GENERATE_ABORTS) |
2368 | if ((ha->iocount > 500) && ((ha->iocount % 500) < 3)) |
2369 | goto handled; |
2370 | #endif |
2371 | |
2372 | if (ha->cp_stat[i] == IGNORE) { |
2373 | ha->cp_stat[i] = FREE; |
2374 | goto handled; |
2375 | } else if (ha->cp_stat[i] == LOCKED) { |
2376 | ha->cp_stat[i] = FREE; |
2377 | printk("%s: ihdlr, mbox %d unlocked, count %d.\n", ha->board_name, i, |
2378 | ha->iocount); |
2379 | goto handled; |
2380 | } else if (ha->cp_stat[i] == FREE) { |
2381 | printk("%s: ihdlr, mbox %d is free, count %d.\n", ha->board_name, i, |
2382 | ha->iocount); |
2383 | goto handled; |
2384 | } else if (ha->cp_stat[i] == IN_RESET) |
2385 | printk("%s: ihdlr, mbox %d is in reset.\n", ha->board_name, i); |
2386 | else if (ha->cp_stat[i] != IN_USE) |
2387 | panic("%s: ihdlr, mbox %d, invalid cp_stat: %d.\n", |
2388 | ha->board_name, i, ha->cp_stat[i]); |
2389 | |
2390 | ha->cp_stat[i] = FREE; |
2391 | SCpnt = cpp->SCpnt; |
2392 | |
2393 | if (SCpnt == NULL) |
2394 | panic("%s: ihdlr, mbox %d, SCpnt == NULL.\n", ha->board_name, i); |
2395 | |
2396 | if (SCpnt->host_scribble == NULL) |
2397 | panic("%s: ihdlr, mbox %d, SCpnt %p garbled.\n", ha->board_name, |
2398 | i, SCpnt); |
2399 | |
2400 | if (*(unsigned int *)SCpnt->host_scribble != i) |
2401 | panic("%s: ihdlr, mbox %d, index mismatch %d.\n", |
2402 | ha->board_name, i, |
2403 | *(unsigned int *)SCpnt->host_scribble); |
2404 | |
2405 | sync_dma(i, ha); |
2406 | |
2407 | if (linked_comm && SCpnt->device->queue_depth > 2 |
2408 | && TLDEV(SCpnt->device->type)) |
2409 | flush_dev(SCpnt->device, blk_rq_pos(SCpnt->request), ha, 1); |
2410 | |
2411 | tstatus = status_byte(spp->target_status); |
2412 | |
2413 | #if defined(DEBUG_GENERATE_ERRORS) |
2414 | if ((ha->iocount > 500) && ((ha->iocount % 200) < 2)) |
2415 | spp->adapter_status = 0x01; |
2416 | #endif |
2417 | |
2418 | switch (spp->adapter_status) { |
2419 | case ASOK: /* status OK */ |
2420 | |
2421 | /* Forces a reset if a disk drive keeps returning BUSY */ |
2422 | if (tstatus == BUSY && SCpnt->device->type != TYPE_TAPE) |
2423 | status = DID_ERROR << 16; |
2424 | |
2425 | /* If there was a bus reset, redo operation on each target */ |
2426 | else if (tstatus != GOOD && SCpnt->device->type == TYPE_DISK |
2427 | && ha->target_redo[SCpnt->device->id][SCpnt-> |
2428 | device-> |
2429 | channel]) |
2430 | status = DID_BUS_BUSY << 16; |
2431 | |
2432 | /* Works around a flaw in scsi.c */ |
2433 | else if (tstatus == CHECK_CONDITION |
2434 | && SCpnt->device->type == TYPE_DISK |
2435 | && (SCpnt->sense_buffer[2] & 0xf) == RECOVERED_ERROR) |
2436 | status = DID_BUS_BUSY << 16; |
2437 | |
2438 | else |
2439 | status = DID_OK << 16; |
2440 | |
2441 | if (tstatus == GOOD) |
2442 | ha->target_redo[SCpnt->device->id][SCpnt->device-> |
2443 | channel] = 0; |
2444 | |
2445 | if (spp->target_status && SCpnt->device->type == TYPE_DISK && |
2446 | (!(tstatus == CHECK_CONDITION && ha->iocount <= 1000 && |
2447 | (SCpnt->sense_buffer[2] & 0xf) == NOT_READY))) |
2448 | printk("%s: ihdlr, target %d.%d:%d, " |
2449 | "target_status 0x%x, sense key 0x%x.\n", |
2450 | ha->board_name, |
2451 | SCpnt->device->channel, SCpnt->device->id, |
2452 | SCpnt->device->lun, |
2453 | spp->target_status, SCpnt->sense_buffer[2]); |
2454 | |
2455 | ha->target_to[SCpnt->device->id][SCpnt->device->channel] = 0; |
2456 | |
2457 | if (ha->last_retried_pid == SCpnt->serial_number) |
2458 | ha->retries = 0; |
2459 | |
2460 | break; |
2461 | case ASST: /* Selection Time Out */ |
2462 | case 0x02: /* Command Time Out */ |
2463 | |
2464 | if (ha->target_to[SCpnt->device->id][SCpnt->device->channel] > 1) |
2465 | status = DID_ERROR << 16; |
2466 | else { |
2467 | status = DID_TIME_OUT << 16; |
2468 | ha->target_to[SCpnt->device->id][SCpnt->device-> |
2469 | channel]++; |
2470 | } |
2471 | |
2472 | break; |
2473 | |
2474 | /* Perform a limited number of internal retries */ |
2475 | case 0x03: /* SCSI Bus Reset Received */ |
2476 | case 0x04: /* Initial Controller Power-up */ |
2477 | |
2478 | for (c = 0; c <= shost->max_channel; c++) |
2479 | for (k = 0; k < shost->max_id; k++) |
2480 | ha->target_redo[k][c] = 1; |
2481 | |
2482 | if (SCpnt->device->type != TYPE_TAPE |
2483 | && ha->retries < MAX_INTERNAL_RETRIES) { |
2484 | |
2485 | #if defined(DID_SOFT_ERROR) |
2486 | status = DID_SOFT_ERROR << 16; |
2487 | #else |
2488 | status = DID_BUS_BUSY << 16; |
2489 | #endif |
2490 | |
2491 | ha->retries++; |
2492 | ha->last_retried_pid = SCpnt->serial_number; |
2493 | } else |
2494 | status = DID_ERROR << 16; |
2495 | |
2496 | break; |
2497 | case 0x05: /* Unexpected Bus Phase */ |
2498 | case 0x06: /* Unexpected Bus Free */ |
2499 | case 0x07: /* Bus Parity Error */ |
2500 | case 0x08: /* SCSI Hung */ |
2501 | case 0x09: /* Unexpected Message Reject */ |
2502 | case 0x0a: /* SCSI Bus Reset Stuck */ |
2503 | case 0x0b: /* Auto Request-Sense Failed */ |
2504 | case 0x0c: /* Controller Ram Parity Error */ |
2505 | default: |
2506 | status = DID_ERROR << 16; |
2507 | break; |
2508 | } |
2509 | |
2510 | SCpnt->result = status | spp->target_status; |
2511 | |
2512 | #if defined(DEBUG_INTERRUPT) |
2513 | if (SCpnt->result || do_trace) |
2514 | #else |
2515 | if ((spp->adapter_status != ASOK && ha->iocount > 1000) || |
2516 | (spp->adapter_status != ASOK && |
2517 | spp->adapter_status != ASST && ha->iocount <= 1000) || |
2518 | do_trace || msg_byte(spp->target_status)) |
2519 | #endif |
2520 | scmd_printk(KERN_INFO, SCpnt, "ihdlr, mbox %2d, err 0x%x:%x," |
2521 | " reg 0x%x, count %d.\n", |
2522 | i, spp->adapter_status, spp->target_status, |
2523 | reg, ha->iocount); |
2524 | |
2525 | unmap_dma(i, ha); |
2526 | |
2527 | /* Set the command state to inactive */ |
2528 | SCpnt->host_scribble = NULL; |
2529 | |
2530 | SCpnt->scsi_done(SCpnt); |
2531 | |
2532 | if (do_trace) |
2533 | printk("%s: ihdlr, exit, irq %d, count %d.\n", ha->board_name, |
2534 | irq, ha->iocount); |
2535 | |
2536 | handled: |
2537 | return IRQ_HANDLED; |
2538 | none: |
2539 | return IRQ_NONE; |
2540 | } |
2541 | |
2542 | static irqreturn_t do_interrupt_handler(int dummy, void *shap) |
2543 | { |
2544 | struct Scsi_Host *shost; |
2545 | unsigned int j; |
2546 | unsigned long spin_flags; |
2547 | irqreturn_t ret; |
2548 | |
2549 | /* Check if the interrupt must be processed by this handler */ |
2550 | if ((j = (unsigned int)((char *)shap - sha)) >= num_boards) |
2551 | return IRQ_NONE; |
2552 | shost = sh[j]; |
2553 | |
2554 | spin_lock_irqsave(shost->host_lock, spin_flags); |
2555 | ret = ihdlr(shost); |
2556 | spin_unlock_irqrestore(shost->host_lock, spin_flags); |
2557 | return ret; |
2558 | } |
2559 | |
2560 | static int eata2x_release(struct Scsi_Host *shost) |
2561 | { |
2562 | struct hostdata *ha = (struct hostdata *)shost->hostdata; |
2563 | unsigned int i; |
2564 | |
2565 | for (i = 0; i < shost->can_queue; i++) |
2566 | kfree((&ha->cp[i])->sglist); |
2567 | |
2568 | for (i = 0; i < shost->can_queue; i++) |
2569 | pci_unmap_single(ha->pdev, ha->cp[i].cp_dma_addr, |
2570 | sizeof(struct mscp), PCI_DMA_BIDIRECTIONAL); |
2571 | |
2572 | if (ha->sp_cpu_addr) |
2573 | pci_free_consistent(ha->pdev, sizeof(struct mssp), |
2574 | ha->sp_cpu_addr, ha->sp_dma_addr); |
2575 | |
2576 | free_irq(shost->irq, &sha[ha->board_number]); |
2577 | |
2578 | if (shost->dma_channel != NO_DMA) |
2579 | free_dma(shost->dma_channel); |
2580 | |
2581 | release_region(shost->io_port, shost->n_io_port); |
2582 | scsi_unregister(shost); |
2583 | return 0; |
2584 | } |
2585 | |
2586 | #include "scsi_module.c" |
2587 | |
2588 | #ifndef MODULE |
2589 | __setup("eata=", option_setup); |
2590 | #endif /* end MODULE */ |
2591 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9