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MOXA linux-2.6.x / linux-2.6.9-uc0 from sdlinux-moxaart.tgz
[linux-2.6.9-moxart.git] / drivers / scsi / ibmmca.c
blob917dc2ed9244dfcc4898465eb34d3408e32ae3b1
1 /*
2 Low Level Linux Driver for the IBM Microchannel SCSI Subsystem for
3 Linux Kernel >= 2.4.0.
4 Copyright (c) 1995 Strom Systems, Inc. under the terms of the GNU
5 General Public License. Written by Martin Kolinek, December 1995.
6 Further development by: Chris Beauregard, Klaus Kudielka, Michael Lang
7 See the file Documentation/scsi/ibmmca.txt for a detailed description
8 of this driver, the commandline arguments and the history of its
9 development.
10 See the WWW-page: http://www.uni-mainz.de/~langm000/linux.html for latest
11 updates, info and ADF-files for adapters supported by this driver.
12
13 Alan Cox <alan@redhat.com>
14 Updated for Linux 2.5.45 to use the new error handler, cleaned up the
15 lock macros and did a few unavoidable locking tweaks, plus one locking
16 fix in the irq and completion path.
17
18 */
19
20 #include <linux/config.h>
21 #ifndef LINUX_VERSION_CODE
22 #include <linux/version.h>
23 #endif
24 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,45)
25 #error "This driver works only with kernel 2.5.45 or higher!"
26 #endif
27 #include <linux/module.h>
28 #include <linux/kernel.h>
29 #include <linux/types.h>
30 #include <linux/ctype.h>
31 #include <linux/string.h>
32 #include <linux/interrupt.h>
33 #include <linux/ioport.h>
34 #include <linux/delay.h>
35 #include <linux/blkdev.h>
36 #include <linux/proc_fs.h>
37 #include <linux/stat.h>
38 #include <linux/mca.h>
39 #include <linux/string.h>
40 #include <linux/spinlock.h>
41 #include <linux/init.h>
42 #include <linux/mca-legacy.h>
43
44 #include <asm/system.h>
45 #include <asm/io.h>
46
47 #include "scsi.h"
48 #include <scsi/scsi_host.h>
49 #include "ibmmca.h"
50
51 /* current version of this driver-source: */
52 #define IBMMCA_SCSI_DRIVER_VERSION "4.0b-ac"
53
54 /* driver configuration */
55 #define IM_MAX_HOSTS 8 /* maximum number of host adapters */
56 #define IM_RESET_DELAY 60 /* seconds allowed for a reset */
57
58 /* driver debugging - #undef all for normal operation */
59 /* if defined: count interrupts and ignore this special one: */
60 #undef IM_DEBUG_TIMEOUT //50
61 #define TIMEOUT_PUN 0
62 #define TIMEOUT_LUN 0
63 /* verbose interrupt: */
64 #undef IM_DEBUG_INT
65 /* verbose queuecommand: */
66 #undef IM_DEBUG_CMD
67 /* verbose queucommand for specific SCSI-device type: */
68 #undef IM_DEBUG_CMD_SPEC_DEV
69 /* verbose device probing */
70 #undef IM_DEBUG_PROBE
71
72 /* device type that shall be displayed on syslog (only during debugging): */
73 #define IM_DEBUG_CMD_DEVICE TYPE_TAPE
74
75 /* relative addresses of hardware registers on a subsystem */
76 #define IM_CMD_REG(hi) (hosts[(hi)]->io_port) /*Command Interface, (4 bytes long) */
77 #define IM_ATTN_REG(hi) (hosts[(hi)]->io_port+4) /*Attention (1 byte) */
78 #define IM_CTR_REG(hi) (hosts[(hi)]->io_port+5) /*Basic Control (1 byte) */
79 #define IM_INTR_REG(hi) (hosts[(hi)]->io_port+6) /*Interrupt Status (1 byte, r/o) */
80 #define IM_STAT_REG(hi) (hosts[(hi)]->io_port+7) /*Basic Status (1 byte, read only) */
81
82 /* basic I/O-port of first adapter */
83 #define IM_IO_PORT 0x3540
84 /* maximum number of hosts that can be found */
85 #define IM_N_IO_PORT 8
86
87 /*requests going into the upper nibble of the Attention register */
88 /*note: the lower nibble specifies the device(0-14), or subsystem(15) */
89 #define IM_IMM_CMD 0x10 /*immediate command */
90 #define IM_SCB 0x30 /*Subsystem Control Block command */
91 #define IM_LONG_SCB 0x40 /*long Subsystem Control Block command */
92 #define IM_EOI 0xe0 /*end-of-interrupt request */
93
94 /*values for bits 7,1,0 of Basic Control reg. (bits 6-2 reserved) */
95 #define IM_HW_RESET 0x80 /*hardware reset */
96 #define IM_ENABLE_DMA 0x02 /*enable subsystem's busmaster DMA */
97 #define IM_ENABLE_INTR 0x01 /*enable interrupts to the system */
98
99 /*to interpret the upper nibble of Interrupt Status register */
100 /*note: the lower nibble specifies the device(0-14), or subsystem(15) */
101 #define IM_SCB_CMD_COMPLETED 0x10
102 #define IM_SCB_CMD_COMPLETED_WITH_RETRIES 0x50
103 #define IM_LOOP_SCATTER_BUFFER_FULL 0x60
104 #define IM_ADAPTER_HW_FAILURE 0x70
105 #define IM_IMMEDIATE_CMD_COMPLETED 0xa0
106 #define IM_CMD_COMPLETED_WITH_FAILURE 0xc0
107 #define IM_CMD_ERROR 0xe0
108 #define IM_SOFTWARE_SEQUENCING_ERROR 0xf0
109
110 /*to interpret bits 3-0 of Basic Status register (bits 7-4 reserved) */
111 #define IM_CMD_REG_FULL 0x08
112 #define IM_CMD_REG_EMPTY 0x04
113 #define IM_INTR_REQUEST 0x02
114 #define IM_BUSY 0x01
115
116 /*immediate commands (word written into low 2 bytes of command reg) */
117 #define IM_RESET_IMM_CMD 0x0400
118 #define IM_FEATURE_CTR_IMM_CMD 0x040c
119 #define IM_DMA_PACING_IMM_CMD 0x040d
120 #define IM_ASSIGN_IMM_CMD 0x040e
121 #define IM_ABORT_IMM_CMD 0x040f
122 #define IM_FORMAT_PREP_IMM_CMD 0x0417
123
124 /*SCB (Subsystem Control Block) structure */
125 struct im_scb {
126 unsigned short command; /*command word (read, etc.) */
127 unsigned short enable; /*enable word, modifies cmd */
128 union {
129 unsigned long log_blk_adr; /*block address on SCSI device */
130 unsigned char scsi_cmd_length; /*6,10,12, for other scsi cmd */
131 } u1;
132 unsigned long sys_buf_adr; /*physical system memory adr */
133 unsigned long sys_buf_length; /*size of sys mem buffer */
134 unsigned long tsb_adr; /*Termination Status Block adr */
135 unsigned long scb_chain_adr; /*optional SCB chain address */
136 union {
137 struct {
138 unsigned short count; /*block count, on SCSI device */
139 unsigned short length; /*block length, on SCSI device */
140 } blk;
141 unsigned char scsi_command[12]; /*other scsi command */
142 } u2;
143 };
144
145 /*structure scatter-gather element (for list of system memory areas) */
146 struct im_sge {
147 void *address;
148 unsigned long byte_length;
149 };
150
151 /*structure returned by a get_pos_info command: */
152 struct im_pos_info {
153 unsigned short pos_id; /* adapter id */
154 unsigned char pos_3a; /* pos 3 (if pos 6 = 0) */
155 unsigned char pos_2; /* pos 2 */
156 unsigned char int_level; /* interrupt level IRQ 11 or 14 */
157 unsigned char pos_4a; /* pos 4 (if pos 6 = 0) */
158 unsigned short connector_size; /* MCA connector size: 16 or 32 Bit */
159 unsigned char num_luns; /* number of supported luns per device */
160 unsigned char num_puns; /* number of supported puns */
161 unsigned char pacing_factor; /* pacing factor */
162 unsigned char num_ldns; /* number of ldns available */
163 unsigned char eoi_off; /* time EOI and interrupt inactive */
164 unsigned char max_busy; /* time between reset and busy on */
165 unsigned short cache_stat; /* ldn cachestat. Bit=1 = not cached */
166 unsigned short retry_stat; /* retry status of ldns. Bit=1=disabled */
167 unsigned char pos_4b; /* pos 4 (if pos 6 = 1) */
168 unsigned char pos_3b; /* pos 3 (if pos 6 = 1) */
169 unsigned char pos_6; /* pos 6 */
170 unsigned char pos_5; /* pos 5 */
171 unsigned short max_overlap; /* maximum overlapping requests */
172 unsigned short num_bus; /* number of SCSI-busses */
173 };
174
175 /*values for SCB command word */
176 #define IM_NO_SYNCHRONOUS 0x0040 /*flag for any command */
177 #define IM_NO_DISCONNECT 0x0080 /*flag for any command */
178 #define IM_READ_DATA_CMD 0x1c01
179 #define IM_WRITE_DATA_CMD 0x1c02
180 #define IM_READ_VERIFY_CMD 0x1c03
181 #define IM_WRITE_VERIFY_CMD 0x1c04
182 #define IM_REQUEST_SENSE_CMD 0x1c08
183 #define IM_READ_CAPACITY_CMD 0x1c09
184 #define IM_DEVICE_INQUIRY_CMD 0x1c0b
185 #define IM_READ_LOGICAL_CMD 0x1c2a
186 #define IM_OTHER_SCSI_CMD_CMD 0x241f
187
188 /* unused, but supported, SCB commands */
189 #define IM_GET_COMMAND_COMPLETE_STATUS_CMD 0x1c07 /* command status */
190 #define IM_GET_POS_INFO_CMD 0x1c0a /* returns neat stuff */
191 #define IM_READ_PREFETCH_CMD 0x1c31 /* caching controller only */
192 #define IM_FOMAT_UNIT_CMD 0x1c16 /* format unit */
193 #define IM_REASSIGN_BLOCK_CMD 0x1c18 /* in case of error */
194
195 /*values to set bits in the enable word of SCB */
196 #define IM_READ_CONTROL 0x8000
197 #define IM_REPORT_TSB_ONLY_ON_ERROR 0x4000
198 #define IM_RETRY_ENABLE 0x2000
199 #define IM_POINTER_TO_LIST 0x1000
200 #define IM_SUPRESS_EXCEPTION_SHORT 0x0400
201 #define IM_BYPASS_BUFFER 0x0200
202 #define IM_CHAIN_ON_NO_ERROR 0x0001
203
204 /*TSB (Termination Status Block) structure */
205 struct im_tsb {
206 unsigned short end_status;
207 unsigned short reserved1;
208 unsigned long residual_byte_count;
209 unsigned long sg_list_element_adr;
210 unsigned short status_length;
211 unsigned char dev_status;
212 unsigned char cmd_status;
213 unsigned char dev_error;
214 unsigned char cmd_error;
215 unsigned short reserved2;
216 unsigned short reserved3;
217 unsigned short low_of_last_scb_adr;
218 unsigned short high_of_last_scb_adr;
219 };
220
221 /*subsystem uses interrupt request level 14 */
222 #define IM_IRQ 14
223 /*SCSI-2 F/W may evade to interrupt 11 */
224 #define IM_IRQ_FW 11
225
226 /* Model 95 has an additional alphanumeric display, which can be used
227 to display SCSI-activities. 8595 models do not have any disk led, which
228 makes this feature quite useful.
229 The regular PS/2 disk led is turned on/off by bits 6,7 of system
230 control port. */
231
232 /* LED display-port (actually, last LED on display) */
233 #define MOD95_LED_PORT 0x108
234 /* system-control-register of PS/2s with diskindicator */
235 #define PS2_SYS_CTR 0x92
236 /* activity displaying methods */
237 #define LED_DISP 1
238 #define LED_ADISP 2
239 #define LED_ACTIVITY 4
240 /* failed intr */
241 #define CMD_FAIL 255
242
243 /* The SCSI-ID(!) of the accessed SCSI-device is shown on PS/2-95 machines' LED
244 displays. ldn is no longer displayed here, because the ldn mapping is now
245 done dynamically and the ldn <-> pun,lun maps can be looked-up at boottime
246 or during uptime in /proc/scsi/ibmmca/<host_no> in case of trouble,
247 interest, debugging or just for having fun. The left number gives the
248 host-adapter number and the right shows the accessed SCSI-ID. */
249
250 /* display_mode is set by the ibmmcascsi= command line arg */
251 static int display_mode = 0;
252 /* set default adapter timeout */
253 static unsigned int adapter_timeout = 45;
254 /* for probing on feature-command: */
255 static unsigned int global_command_error_excuse = 0;
256 /* global setting by command line for adapter_speed */
257 static int global_adapter_speed = 0; /* full speed by default */
258
259 /* Panel / LED on, do it right for F/W addressin, too. adisplay will
260 * just ignore ids>7, as the panel has only 7 digits available */
261 #define PS2_DISK_LED_ON(ad,id) { if (display_mode & LED_DISP) { if (id>9) \
262 outw((ad+48)|((id+55)<<8), MOD95_LED_PORT ); else \
263 outw((ad+48)|((id+48)<<8), MOD95_LED_PORT ); } else \
264 if (display_mode & LED_ADISP) { if (id<7) outb((char)(id+48),MOD95_LED_PORT+1+id); \
265 outb((char)(ad+48), MOD95_LED_PORT); } \
266 if ((display_mode & LED_ACTIVITY)||(!display_mode)) \
267 outb(inb(PS2_SYS_CTR) | 0xc0, PS2_SYS_CTR); }
268
269 /* Panel / LED off */
270 /* bug fixed, Dec 15, 1997, where | was replaced by & here */
271 #define PS2_DISK_LED_OFF() { if (display_mode & LED_DISP) \
272 outw(0x2020, MOD95_LED_PORT ); else if (display_mode & LED_ADISP) { \
273 outl(0x20202020,MOD95_LED_PORT); outl(0x20202020,MOD95_LED_PORT+4); } \
274 if ((display_mode & LED_ACTIVITY)||(!display_mode)) \
275 outb(inb(PS2_SYS_CTR) & 0x3f, PS2_SYS_CTR); }
276
277 /*list of supported subsystems */
278 struct subsys_list_struct {
279 unsigned short mca_id;
280 char *description;
281 };
282
283 /* types of different supported hardware that goes to hostdata special */
284 #define IBM_SCSI2_FW 0
285 #define IBM_7568_WCACHE 1
286 #define IBM_EXP_UNIT 2
287 #define IBM_SCSI_WCACHE 3
288 #define IBM_SCSI 4
289
290 /* other special flags for hostdata structure */
291 #define FORCED_DETECTION 100
292 #define INTEGRATED_SCSI 101
293
294 /* List of possible IBM-SCSI-adapters */
295 struct subsys_list_struct subsys_list[] = {
296 {0x8efc, "IBM SCSI-2 F/W Adapter"}, /* special = 0 */
297 {0x8efd, "IBM 7568 Industrial Computer SCSI Adapter w/Cache"}, /* special = 1 */
298 {0x8ef8, "IBM Expansion Unit SCSI Controller"}, /* special = 2 */
299 {0x8eff, "IBM SCSI Adapter w/Cache"}, /* special = 3 */
300 {0x8efe, "IBM SCSI Adapter"}, /* special = 4 */
301 };
302
303 /* Max number of logical devices (can be up from 0 to 14). 15 is the address
304 of the adapter itself. */
305 #define MAX_LOG_DEV 15
306
307 /*local data for a logical device */
308 struct logical_device {
309 struct im_scb scb; /* SCSI-subsystem-control-block structure */
310 struct im_tsb tsb; /* SCSI command complete status block structure */
311 struct im_sge sge[16]; /* scatter gather list structure */
312 unsigned char buf[256]; /* SCSI command return data buffer */
313 Scsi_Cmnd *cmd; /* SCSI-command that is currently in progress */
314 int device_type; /* type of the SCSI-device. See include/scsi/scsi.h
315 for interpretation of the possible values */
316 int block_length; /* blocksize of a particular logical SCSI-device */
317 int cache_flag; /* 1 if this is uncached, 0 if cache is present for ldn */
318 int retry_flag; /* 1 if adapter retry is disabled, 0 if enabled */
319 };
320
321 /* statistics of the driver during operations (for proc_info) */
322 struct Driver_Statistics {
323 /* SCSI statistics on the adapter */
324 int ldn_access[MAX_LOG_DEV + 1]; /* total accesses on a ldn */
325 int ldn_read_access[MAX_LOG_DEV + 1]; /* total read-access on a ldn */
326 int ldn_write_access[MAX_LOG_DEV + 1]; /* total write-access on a ldn */
327 int ldn_inquiry_access[MAX_LOG_DEV + 1]; /* total inquiries on a ldn */
328 int ldn_modeselect_access[MAX_LOG_DEV + 1]; /* total mode selects on ldn */
329 int scbs; /* short SCBs queued */
330 int long_scbs; /* long SCBs queued */
331 int total_accesses; /* total accesses on all ldns */
332 int total_interrupts; /* total interrupts (should be
333 same as total_accesses) */
334 int total_errors; /* command completed with error */
335 /* dynamical assignment statistics */
336 int total_scsi_devices; /* number of physical pun,lun */
337 int dyn_flag; /* flag showing dynamical mode */
338 int dynamical_assignments; /* number of remappings of ldns */
339 int ldn_assignments[MAX_LOG_DEV + 1]; /* number of remappings of each
340 ldn */
341 };
342
343 /* data structure for each host adapter */
344 struct ibmmca_hostdata {
345 /* array of logical devices: */
346 struct logical_device _ld[MAX_LOG_DEV + 1];
347 /* array to convert (pun, lun) into logical device number: */
348 unsigned char _get_ldn[16][8];
349 /*array that contains the information about the physical SCSI-devices
350 attached to this host adapter: */
351 unsigned char _get_scsi[16][8];
352 /* used only when checking logical devices: */
353 int _local_checking_phase_flag;
354 /* report received interrupt: */
355 int _got_interrupt;
356 /* report termination-status of SCSI-command: */
357 int _stat_result;
358 /* reset status (used only when doing reset): */
359 int _reset_status;
360 /* code of the last SCSI command (needed for panic info): */
361 int _last_scsi_command[MAX_LOG_DEV + 1];
362 /* identifier of the last SCSI-command type */
363 int _last_scsi_type[MAX_LOG_DEV + 1];
364 /* last blockcount */
365 int _last_scsi_blockcount[MAX_LOG_DEV + 1];
366 /* last locgical block address */
367 unsigned long _last_scsi_logical_block[MAX_LOG_DEV + 1];
368 /* Counter that points on the next reassignable ldn for dynamical
369 remapping. The default value is 7, that is the first reassignable
370 number in the list at boottime: */
371 int _next_ldn;
372 /* Statistics-structure for this IBM-SCSI-host: */
373 struct Driver_Statistics _IBM_DS;
374 /* This hostadapters pos-registers pos2 until pos6 */
375 unsigned int _pos[8];
376 /* assign a special variable, that contains dedicated info about the
377 adaptertype */
378 int _special;
379 /* connector size on the MCA bus */
380 int _connector_size;
381 /* synchronous SCSI transfer rate bitpattern */
382 int _adapter_speed;
383 };
384
385 /* macros to access host data structure */
386 #define subsystem_pun(hi) (hosts[(hi)]->this_id)
387 #define subsystem_maxid(hi) (hosts[(hi)]->max_id)
388 #define ld(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_ld)
389 #define get_ldn(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_get_ldn)
390 #define get_scsi(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_get_scsi)
391 #define local_checking_phase_flag(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_local_checking_phase_flag)
392 #define got_interrupt(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_got_interrupt)
393 #define stat_result(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_stat_result)
394 #define reset_status(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_reset_status)
395 #define last_scsi_command(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_command)
396 #define last_scsi_type(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_type)
397 #define last_scsi_blockcount(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_blockcount)
398 #define last_scsi_logical_block(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_logical_block)
399 #define last_scsi_type(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_type)
400 #define next_ldn(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_next_ldn)
401 #define IBM_DS(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_IBM_DS)
402 #define special(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_special)
403 #define subsystem_connector_size(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_connector_size)
404 #define adapter_speed(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_adapter_speed)
405 #define pos2(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_pos[2])
406 #define pos3(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_pos[3])
407 #define pos4(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_pos[4])
408 #define pos5(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_pos[5])
409 #define pos6(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_pos[6])
410
411 /* Define a arbitrary number as subsystem-marker-type. This number is, as
412 described in the ANSI-SCSI-standard, not occupied by other device-types. */
413 #define TYPE_IBM_SCSI_ADAPTER 0x2F
414
415 /* Define 0xFF for no device type, because this type is not defined within
416 the ANSI-SCSI-standard, therefore, it can be used and should not cause any
417 harm. */
418 #define TYPE_NO_DEVICE 0xFF
419
420 /* define medium-changer. If this is not defined previously, e.g. Linux
421 2.0.x, define this type here. */
422 #ifndef TYPE_MEDIUM_CHANGER
423 #define TYPE_MEDIUM_CHANGER 0x08
424 #endif
425
426 /* define possible operations for the immediate_assign command */
427 #define SET_LDN 0
428 #define REMOVE_LDN 1
429
430 /* ldn which is used to probe the SCSI devices */
431 #define PROBE_LDN 0
432
433 /* reset status flag contents */
434 #define IM_RESET_NOT_IN_PROGRESS 0
435 #define IM_RESET_IN_PROGRESS 1
436 #define IM_RESET_FINISHED_OK 2
437 #define IM_RESET_FINISHED_FAIL 3
438 #define IM_RESET_NOT_IN_PROGRESS_NO_INT 4
439 #define IM_RESET_FINISHED_OK_NO_INT 5
440
441 /* define undefined SCSI-command */
442 #define NO_SCSI 0xffff
443
444 /*-----------------------------------------------------------------------*/
445
446 /* if this is nonzero, ibmmcascsi option has been passed to the kernel */
447 static int io_port[IM_MAX_HOSTS] = { 0, 0, 0, 0, 0, 0, 0, 0 };
448 static int scsi_id[IM_MAX_HOSTS] = { 7, 7, 7, 7, 7, 7, 7, 7 };
449
450 /* fill module-parameters only, when this define is present.
451 (that is kernel version 2.1.x) */
452 #if defined(MODULE)
453 static char *boot_options = NULL;
454 MODULE_PARM(boot_options, "s");
455 MODULE_PARM(io_port, "1-" __MODULE_STRING(IM_MAX_HOSTS) "i");
456 MODULE_PARM(scsi_id, "1-" __MODULE_STRING(IM_MAX_HOSTS) "i");
457 MODULE_PARM(display, "1i");
458 MODULE_PARM(adisplay, "1i");
459 MODULE_PARM(normal, "1i");
460 MODULE_PARM(ansi, "1i");
461 #endif
462 /*counter of concurrent disk read/writes, to turn on/off disk led */
463 static int disk_rw_in_progress = 0;
464
465 /* host information */
466 static int found = 0;
467 static struct Scsi_Host *hosts[IM_MAX_HOSTS + 1] = {
468 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
469 };
470 static unsigned int pos[8]; /* whole pos register-line for diagnosis */
471 /* Taking into account the additions, made by ZP Gu.
472 * This selects now the preset value from the configfile and
473 * offers the 'normal' commandline option to be accepted */
474 #ifdef CONFIG_IBMMCA_SCSI_ORDER_STANDARD
475 static char ibm_ansi_order = 1;
476 #else
477 static char ibm_ansi_order = 0;
478 #endif
479
480 static void issue_cmd(int, unsigned long, unsigned char);
481 static void internal_done(Scsi_Cmnd * cmd);
482 static void check_devices(int, int);
483 static int immediate_assign(int, unsigned int, unsigned int, unsigned int, unsigned int);
484 static int immediate_feature(int, unsigned int, unsigned int);
485 #ifdef CONFIG_IBMMCA_SCSI_DEV_RESET
486 static int immediate_reset(int, unsigned int);
487 #endif
488 static int device_inquiry(int, int);
489 static int read_capacity(int, int);
490 static int get_pos_info(int);
491 static char *ti_p(int);
492 static char *ti_l(int);
493 static char *ibmrate(unsigned int, int);
494 static int probe_display(int);
495 static int probe_bus_mode(int);
496 static int device_exists(int, int, int *, int *);
497 static struct Scsi_Host *ibmmca_register(Scsi_Host_Template *, int, int, int, char *);
498 static int option_setup(char *);
499 /* local functions needed for proc_info */
500 static int ldn_access_load(int, int);
501 static int ldn_access_total_read_write(int);
502
503 static irqreturn_t interrupt_handler(int irq, void *dev_id,
504 struct pt_regs *regs)
505 {
506 int host_index, ihost_index;
507 unsigned int intr_reg;
508 unsigned int cmd_result;
509 unsigned int ldn;
510 Scsi_Cmnd *cmd;
511 int lastSCSI;
512 struct Scsi_Host *dev = dev_id;
513
514 spin_lock(dev->host_lock);
515 /* search for one adapter-response on shared interrupt */
516 for (host_index = 0; hosts[host_index] && !(inb(IM_STAT_REG(host_index)) & IM_INTR_REQUEST); host_index++);
517 /* return if some other device on this IRQ caused the interrupt */
518 if (!hosts[host_index]) {
519 spin_unlock(dev->host_lock);
520 return IRQ_NONE;
521 }
522
523 /* the reset-function already did all the job, even ints got
524 renabled on the subsystem, so just return */
525 if ((reset_status(host_index) == IM_RESET_NOT_IN_PROGRESS_NO_INT) || (reset_status(host_index) == IM_RESET_FINISHED_OK_NO_INT)) {
526 reset_status(host_index) = IM_RESET_NOT_IN_PROGRESS;
527 spin_unlock(dev->host_lock);
528 return IRQ_HANDLED;
529 }
530
531 /*must wait for attention reg not busy, then send EOI to subsystem */
532 while (1) {
533 if (!(inb(IM_STAT_REG(host_index)) & IM_BUSY))
534 break;
535 cpu_relax();
536 }
537 ihost_index = host_index;
538 /*get command result and logical device */
539 intr_reg = (unsigned char) (inb(IM_INTR_REG(ihost_index)));
540 cmd_result = intr_reg & 0xf0;
541 ldn = intr_reg & 0x0f;
542 /* get the last_scsi_command here */
543 lastSCSI = last_scsi_command(ihost_index)[ldn];
544 outb(IM_EOI | ldn, IM_ATTN_REG(ihost_index));
545
546 /*these should never happen (hw fails, or a local programming bug) */
547 if (!global_command_error_excuse) {
548 switch (cmd_result) {
549 /* Prevent from Ooopsing on error to show the real reason */
550 case IM_ADAPTER_HW_FAILURE:
551 case IM_SOFTWARE_SEQUENCING_ERROR:
552 case IM_CMD_ERROR:
553 printk(KERN_ERR "IBM MCA SCSI: Fatal Subsystem ERROR!\n");
554 printk(KERN_ERR " Last cmd=0x%x, ena=%x, len=", lastSCSI, ld(ihost_index)[ldn].scb.enable);
555 if (ld(ihost_index)[ldn].cmd)
556 printk("%ld/%ld,", (long) (ld(ihost_index)[ldn].cmd->request_bufflen), (long) (ld(ihost_index)[ldn].scb.sys_buf_length));
557 else
558 printk("none,");
559 if (ld(ihost_index)[ldn].cmd)
560 printk("Blocksize=%d", ld(ihost_index)[ldn].scb.u2.blk.length);
561 else
562 printk("Blocksize=none");
563 printk(", host=0x%x, ldn=0x%x\n", ihost_index, ldn);
564 if (ld(ihost_index)[ldn].cmd) {
565 printk(KERN_ERR "Blockcount=%d/%d\n", last_scsi_blockcount(ihost_index)[ldn], ld(ihost_index)[ldn].scb.u2.blk.count);
566 printk(KERN_ERR "Logical block=%lx/%lx\n", last_scsi_logical_block(ihost_index)[ldn], ld(ihost_index)[ldn].scb.u1.log_blk_adr);
567 }
568 printk(KERN_ERR "Reason given: %s\n", (cmd_result == IM_ADAPTER_HW_FAILURE) ? "HARDWARE FAILURE" : (cmd_result == IM_SOFTWARE_SEQUENCING_ERROR) ? "SOFTWARE SEQUENCING ERROR" : (cmd_result == IM_CMD_ERROR) ? "COMMAND ERROR" : "UNKNOWN");
569 /* if errors appear, enter this section to give detailed info */
570 printk(KERN_ERR "IBM MCA SCSI: Subsystem Error-Status follows:\n");
571 printk(KERN_ERR " Command Type................: %x\n", last_scsi_type(ihost_index)[ldn]);
572 printk(KERN_ERR " Attention Register..........: %x\n", inb(IM_ATTN_REG(ihost_index)));
573 printk(KERN_ERR " Basic Control Register......: %x\n", inb(IM_CTR_REG(ihost_index)));
574 printk(KERN_ERR " Interrupt Status Register...: %x\n", intr_reg);
575 printk(KERN_ERR " Basic Status Register.......: %x\n", inb(IM_STAT_REG(ihost_index)));
576 if ((last_scsi_type(ihost_index)[ldn] == IM_SCB) || (last_scsi_type(ihost_index)[ldn] == IM_LONG_SCB)) {
577 printk(KERN_ERR " SCB-Command.................: %x\n", ld(ihost_index)[ldn].scb.command);
578 printk(KERN_ERR " SCB-Enable..................: %x\n", ld(ihost_index)[ldn].scb.enable);
579 printk(KERN_ERR " SCB-logical block address...: %lx\n", ld(ihost_index)[ldn].scb.u1.log_blk_adr);
580 printk(KERN_ERR " SCB-system buffer address...: %lx\n", ld(ihost_index)[ldn].scb.sys_buf_adr);
581 printk(KERN_ERR " SCB-system buffer length....: %lx\n", ld(ihost_index)[ldn].scb.sys_buf_length);
582 printk(KERN_ERR " SCB-tsb address.............: %lx\n", ld(ihost_index)[ldn].scb.tsb_adr);
583 printk(KERN_ERR " SCB-Chain address...........: %lx\n", ld(ihost_index)[ldn].scb.scb_chain_adr);
584 printk(KERN_ERR " SCB-block count.............: %x\n", ld(ihost_index)[ldn].scb.u2.blk.count);
585 printk(KERN_ERR " SCB-block length............: %x\n", ld(ihost_index)[ldn].scb.u2.blk.length);
586 }
587 printk(KERN_ERR " Send this report to the maintainer.\n");
588 panic("IBM MCA SCSI: Fatal error message from the subsystem (0x%X,0x%X)!\n", lastSCSI, cmd_result);
589 break;
590 }
591 } else {
592 /* The command error handling is made silent, but we tell the
593 * calling function, that there is a reported error from the
594 * adapter. */
595 switch (cmd_result) {
596 case IM_ADAPTER_HW_FAILURE:
597 case IM_SOFTWARE_SEQUENCING_ERROR:
598 case IM_CMD_ERROR:
599 global_command_error_excuse = CMD_FAIL;
600 break;
601 default:
602 global_command_error_excuse = 0;
603 break;
604 }
605 }
606 /* if no panic appeared, increase the interrupt-counter */
607 IBM_DS(ihost_index).total_interrupts++;
608 /*only for local checking phase */
609 if (local_checking_phase_flag(ihost_index)) {
610 stat_result(ihost_index) = cmd_result;
611 got_interrupt(ihost_index) = 1;
612 reset_status(ihost_index) = IM_RESET_FINISHED_OK;
613 last_scsi_command(ihost_index)[ldn] = NO_SCSI;
614 spin_unlock(dev->host_lock);
615 return IRQ_HANDLED;
616 }
617 /* handling of commands coming from upper level of scsi driver */
618 if (last_scsi_type(ihost_index)[ldn] == IM_IMM_CMD) {
619 /* verify ldn, and may handle rare reset immediate command */
620 if ((reset_status(ihost_index) == IM_RESET_IN_PROGRESS) && (last_scsi_command(ihost_index)[ldn] == IM_RESET_IMM_CMD)) {
621 if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE) {
622 disk_rw_in_progress = 0;
623 PS2_DISK_LED_OFF();
624 reset_status(ihost_index) = IM_RESET_FINISHED_FAIL;
625 } else {
626 /*reset disk led counter, turn off disk led */
627 disk_rw_in_progress = 0;
628 PS2_DISK_LED_OFF();
629 reset_status(ihost_index) = IM_RESET_FINISHED_OK;
630 }
631 stat_result(ihost_index) = cmd_result;
632 last_scsi_command(ihost_index)[ldn] = NO_SCSI;
633 last_scsi_type(ihost_index)[ldn] = 0;
634 spin_unlock(dev->host_lock);
635 return IRQ_HANDLED;
636 } else if (last_scsi_command(ihost_index)[ldn] == IM_ABORT_IMM_CMD) {
637 /* react on SCSI abort command */
638 #ifdef IM_DEBUG_PROBE
639 printk("IBM MCA SCSI: Interrupt from SCSI-abort.\n");
640 #endif
641 disk_rw_in_progress = 0;
642 PS2_DISK_LED_OFF();
643 cmd = ld(ihost_index)[ldn].cmd;
644 ld(ihost_index)[ldn].cmd = NULL;
645 if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE)
646 cmd->result = DID_NO_CONNECT << 16;
647 else
648 cmd->result = DID_ABORT << 16;
649 stat_result(ihost_index) = cmd_result;
650 last_scsi_command(ihost_index)[ldn] = NO_SCSI;
651 last_scsi_type(ihost_index)[ldn] = 0;
652 if (cmd->scsi_done)
653 (cmd->scsi_done) (cmd); /* should be the internal_done */
654 spin_unlock(dev->host_lock);
655 return IRQ_HANDLED;
656 } else {
657 disk_rw_in_progress = 0;
658 PS2_DISK_LED_OFF();
659 reset_status(ihost_index) = IM_RESET_FINISHED_OK;
660 stat_result(ihost_index) = cmd_result;
661 last_scsi_command(ihost_index)[ldn] = NO_SCSI;
662 spin_unlock(dev->host_lock);
663 return IRQ_HANDLED;
664 }
665 }
666 last_scsi_command(ihost_index)[ldn] = NO_SCSI;
667 last_scsi_type(ihost_index)[ldn] = 0;
668 cmd = ld(ihost_index)[ldn].cmd;
669 ld(ihost_index)[ldn].cmd = NULL;
670 #ifdef IM_DEBUG_TIMEOUT
671 if (cmd) {
672 if ((cmd->target == TIMEOUT_PUN) && (cmd->device->lun == TIMEOUT_LUN)) {
673 printk("IBM MCA SCSI: Ignoring interrupt from pun=%x, lun=%x.\n", cmd->target, cmd->device->lun);
674 return IRQ_HANDLED;
675 }
676 }
677 #endif
678 /*if no command structure, just return, else clear cmd */
679 if (!cmd)
680 {
681 spin_unlock(dev->host_lock);
682 return IRQ_HANDLED;
683 }
684
685 #ifdef IM_DEBUG_INT
686 printk("cmd=%02x ireg=%02x ds=%02x cs=%02x de=%02x ce=%02x\n", cmd->cmnd[0], intr_reg, ld(ihost_index)[ldn].tsb.dev_status, ld(ihost_index)[ldn].tsb.cmd_status, ld(ihost_index)[ldn].tsb.dev_error, ld(ihost_index)[ldn].tsb.cmd_error);
687 #endif
688 /*if this is end of media read/write, may turn off PS/2 disk led */
689 if ((ld(ihost_index)[ldn].device_type != TYPE_NO_LUN) && (ld(ihost_index)[ldn].device_type != TYPE_NO_DEVICE)) {
690 /* only access this, if there was a valid device addressed */
691 if (--disk_rw_in_progress == 0)
692 PS2_DISK_LED_OFF();
693 }
694
695 /* IBM describes the status-mask to be 0x1e, but this is not conform
696 * with SCSI-definition, I suppose, the reason for it is that IBM
697 * adapters do not support CMD_TERMINATED, TASK_SET_FULL and
698 * ACA_ACTIVE as returning statusbyte information. (ML) */
699 if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE) {
700 cmd->result = (unsigned char) (ld(ihost_index)[ldn].tsb.dev_status & 0x1e);
701 IBM_DS(ihost_index).total_errors++;
702 } else
703 cmd->result = 0;
704 /* write device status into cmd->result, and call done function */
705 if (lastSCSI == NO_SCSI) { /* unexpected interrupt :-( */
706 cmd->result |= DID_BAD_INTR << 16;
707 printk("IBM MCA SCSI: WARNING - Interrupt from non-pending SCSI-command!\n");
708 } else /* things went right :-) */
709 cmd->result |= DID_OK << 16;
710 if (cmd->scsi_done)
711 (cmd->scsi_done) (cmd);
712 spin_unlock(dev->host_lock);
713 return IRQ_HANDLED;
714 }
715
716 static void issue_cmd(int host_index, unsigned long cmd_reg, unsigned char attn_reg)
717 {
718 unsigned long flags;
719 /* must wait for attention reg not busy */
720 while (1) {
721 spin_lock_irqsave(hosts[host_index]->host_lock, flags);
722 if (!(inb(IM_STAT_REG(host_index)) & IM_BUSY))
723 break;
724 spin_unlock_irqrestore(hosts[host_index]->host_lock, flags);
725 }
726 /* write registers and enable system interrupts */
727 outl(cmd_reg, IM_CMD_REG(host_index));
728 outb(attn_reg, IM_ATTN_REG(host_index));
729 spin_unlock_irqrestore(hosts[host_index]->host_lock, flags);
730 }
731
732 static void internal_done(Scsi_Cmnd * cmd)
733 {
734 cmd->SCp.Status++;
735 return;
736 }
737
738 /* SCSI-SCB-command for device_inquiry */
739 static int device_inquiry(int host_index, int ldn)
740 {
741 int retr;
742 struct im_scb *scb;
743 struct im_tsb *tsb;
744 unsigned char *buf;
745
746 scb = &(ld(host_index)[ldn].scb);
747 tsb = &(ld(host_index)[ldn].tsb);
748 buf = (unsigned char *) (&(ld(host_index)[ldn].buf));
749 ld(host_index)[ldn].tsb.dev_status = 0; /* prepare statusblock */
750 for (retr = 0; retr < 3; retr++) {
751 /* fill scb with inquiry command */
752 scb->command = IM_DEVICE_INQUIRY_CMD | IM_NO_DISCONNECT;
753 scb->enable = IM_REPORT_TSB_ONLY_ON_ERROR | IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_RETRY_ENABLE | IM_BYPASS_BUFFER;
754 last_scsi_command(host_index)[ldn] = IM_DEVICE_INQUIRY_CMD;
755 last_scsi_type(host_index)[ldn] = IM_SCB;
756 scb->sys_buf_adr = isa_virt_to_bus(buf);
757 scb->sys_buf_length = 255; /* maximum bufferlength gives max info */
758 scb->tsb_adr = isa_virt_to_bus(tsb);
759 /* issue scb to passed ldn, and busy wait for interrupt */
760 got_interrupt(host_index) = 0;
761 issue_cmd(host_index, isa_virt_to_bus(scb), IM_SCB | ldn);
762 while (!got_interrupt(host_index))
763 barrier();
764
765 /*if command succesful, break */
766 if ((stat_result(host_index) == IM_SCB_CMD_COMPLETED) || (stat_result(host_index) == IM_SCB_CMD_COMPLETED_WITH_RETRIES))
767 return 1;
768 }
769 /*if all three retries failed, return "no device at this ldn" */
770 if (retr >= 3)
771 return 0;
772 else
773 return 1;
774 }
775
776 static int read_capacity(int host_index, int ldn)
777 {
778 int retr;
779 struct im_scb *scb;
780 struct im_tsb *tsb;
781 unsigned char *buf;
782
783 scb = &(ld(host_index)[ldn].scb);
784 tsb = &(ld(host_index)[ldn].tsb);
785 buf = (unsigned char *) (&(ld(host_index)[ldn].buf));
786 ld(host_index)[ldn].tsb.dev_status = 0;
787 for (retr = 0; retr < 3; retr++) {
788 /*fill scb with read capacity command */
789 scb->command = IM_READ_CAPACITY_CMD;
790 scb->enable = IM_REPORT_TSB_ONLY_ON_ERROR | IM_READ_CONTROL | IM_RETRY_ENABLE | IM_BYPASS_BUFFER;
791 last_scsi_command(host_index)[ldn] = IM_READ_CAPACITY_CMD;
792 last_scsi_type(host_index)[ldn] = IM_SCB;
793 scb->sys_buf_adr = isa_virt_to_bus(buf);
794 scb->sys_buf_length = 8;
795 scb->tsb_adr = isa_virt_to_bus(tsb);
796 /*issue scb to passed ldn, and busy wait for interrupt */
797 got_interrupt(host_index) = 0;
798 issue_cmd(host_index, isa_virt_to_bus(scb), IM_SCB | ldn);
799 while (!got_interrupt(host_index))
800 barrier();
801
802 /*if got capacity, get block length and return one device found */
803 if ((stat_result(host_index) == IM_SCB_CMD_COMPLETED) || (stat_result(host_index) == IM_SCB_CMD_COMPLETED_WITH_RETRIES))
804 return 1;
805 }
806 /*if all three retries failed, return "no device at this ldn" */
807 if (retr >= 3)
808 return 0;
809 else
810 return 1;
811 }
812
813 static int get_pos_info(int host_index)
814 {
815 int retr;
816 struct im_scb *scb;
817 struct im_tsb *tsb;
818 unsigned char *buf;
819
820 scb = &(ld(host_index)[MAX_LOG_DEV].scb);
821 tsb = &(ld(host_index)[MAX_LOG_DEV].tsb);
822 buf = (unsigned char *) (&(ld(host_index)[MAX_LOG_DEV].buf));
823 ld(host_index)[MAX_LOG_DEV].tsb.dev_status = 0;
824 for (retr = 0; retr < 3; retr++) {
825 /*fill scb with get_pos_info command */
826 scb->command = IM_GET_POS_INFO_CMD;
827 scb->enable = IM_READ_CONTROL | IM_REPORT_TSB_ONLY_ON_ERROR | IM_RETRY_ENABLE | IM_BYPASS_BUFFER;
828 last_scsi_command(host_index)[MAX_LOG_DEV] = IM_GET_POS_INFO_CMD;
829 last_scsi_type(host_index)[MAX_LOG_DEV] = IM_SCB;
830 scb->sys_buf_adr = isa_virt_to_bus(buf);
831 if (special(host_index) == IBM_SCSI2_FW)
832 scb->sys_buf_length = 256; /* get all info from F/W adapter */
833 else
834 scb->sys_buf_length = 18; /* get exactly 18 bytes for other SCSI */
835 scb->tsb_adr = isa_virt_to_bus(tsb);
836 /*issue scb to ldn=15, and busy wait for interrupt */
837 got_interrupt(host_index) = 0;
838 issue_cmd(host_index, isa_virt_to_bus(scb), IM_SCB | MAX_LOG_DEV);
839
840 /* FIXME: timeout */
841 while (!got_interrupt(host_index))
842 barrier();
843
844 /*if got POS-stuff, get block length and return one device found */
845 if ((stat_result(host_index) == IM_SCB_CMD_COMPLETED) || (stat_result(host_index) == IM_SCB_CMD_COMPLETED_WITH_RETRIES))
846 return 1;
847 }
848 /* if all three retries failed, return "no device at this ldn" */
849 if (retr >= 3)
850 return 0;
851 else
852 return 1;
853 }
854
855 /* SCSI-immediate-command for assign. This functions maps/unmaps specific
856 ldn-numbers on SCSI (PUN,LUN). It is needed for presetting of the
857 subsystem and for dynamical remapping od ldns. */
858 static int immediate_assign(int host_index, unsigned int pun, unsigned int lun, unsigned int ldn, unsigned int operation)
859 {
860 int retr;
861 unsigned long imm_cmd;
862
863 for (retr = 0; retr < 3; retr++) {
864 /* select mutation level of the SCSI-adapter */
865 switch (special(host_index)) {
866 case IBM_SCSI2_FW:
867 imm_cmd = (unsigned long) (IM_ASSIGN_IMM_CMD);
868 imm_cmd |= (unsigned long) ((lun & 7) << 24);
869 imm_cmd |= (unsigned long) ((operation & 1) << 23);
870 imm_cmd |= (unsigned long) ((pun & 7) << 20) | ((pun & 8) << 24);
871 imm_cmd |= (unsigned long) ((ldn & 15) << 16);
872 break;
873 default:
874 imm_cmd = inl(IM_CMD_REG(host_index));
875 imm_cmd &= (unsigned long) (0xF8000000); /* keep reserved bits */
876 imm_cmd |= (unsigned long) (IM_ASSIGN_IMM_CMD);
877 imm_cmd |= (unsigned long) ((lun & 7) << 24);
878 imm_cmd |= (unsigned long) ((operation & 1) << 23);
879 imm_cmd |= (unsigned long) ((pun & 7) << 20);
880 imm_cmd |= (unsigned long) ((ldn & 15) << 16);
881 break;
882 }
883 last_scsi_command(host_index)[MAX_LOG_DEV] = IM_ASSIGN_IMM_CMD;
884 last_scsi_type(host_index)[MAX_LOG_DEV] = IM_IMM_CMD;
885 got_interrupt(host_index) = 0;
886 issue_cmd(host_index, (unsigned long) (imm_cmd), IM_IMM_CMD | MAX_LOG_DEV);
887 while (!got_interrupt(host_index))
888 barrier();
889
890 /*if command succesful, break */
891 if (stat_result(host_index) == IM_IMMEDIATE_CMD_COMPLETED)
892 return 1;
893 }
894 if (retr >= 3)
895 return 0;
896 else
897 return 1;
898 }
899
900 static int immediate_feature(int host_index, unsigned int speed, unsigned int timeout)
901 {
902 int retr;
903 unsigned long imm_cmd;
904
905 for (retr = 0; retr < 3; retr++) {
906 /* select mutation level of the SCSI-adapter */
907 imm_cmd = IM_FEATURE_CTR_IMM_CMD;
908 imm_cmd |= (unsigned long) ((speed & 0x7) << 29);
909 imm_cmd |= (unsigned long) ((timeout & 0x1fff) << 16);
910 last_scsi_command(host_index)[MAX_LOG_DEV] = IM_FEATURE_CTR_IMM_CMD;
911 last_scsi_type(host_index)[MAX_LOG_DEV] = IM_IMM_CMD;
912 got_interrupt(host_index) = 0;
913 /* we need to run into command errors in order to probe for the
914 * right speed! */
915 global_command_error_excuse = 1;
916 issue_cmd(host_index, (unsigned long) (imm_cmd), IM_IMM_CMD | MAX_LOG_DEV);
917
918 /* FIXME: timeout */
919 while (!got_interrupt(host_index))
920 barrier();
921 if (global_command_error_excuse == CMD_FAIL) {
922 global_command_error_excuse = 0;
923 return 2;
924 } else
925 global_command_error_excuse = 0;
926 /*if command succesful, break */
927 if (stat_result(host_index) == IM_IMMEDIATE_CMD_COMPLETED)
928 return 1;
929 }
930 if (retr >= 3)
931 return 0;
932 else
933 return 1;
934 }
935
936 #ifdef CONFIG_IBMMCA_SCSI_DEV_RESET
937 static int immediate_reset(int host_index, unsigned int ldn)
938 {
939 int retries;
940 int ticks;
941 unsigned long imm_command;
942
943 for (retries = 0; retries < 3; retries++) {
944 imm_command = inl(IM_CMD_REG(host_index));
945 imm_command &= (unsigned long) (0xFFFF0000); /* keep reserved bits */
946 imm_command |= (unsigned long) (IM_RESET_IMM_CMD);
947 last_scsi_command(host_index)[ldn] = IM_RESET_IMM_CMD;
948 last_scsi_type(host_index)[ldn] = IM_IMM_CMD;
949 got_interrupt(host_index) = 0;
950 reset_status(host_index) = IM_RESET_IN_PROGRESS;
951 issue_cmd(host_index, (unsigned long) (imm_command), IM_IMM_CMD | ldn);
952 ticks = IM_RESET_DELAY * HZ;
953 while (reset_status(host_index) == IM_RESET_IN_PROGRESS && --ticks) {
954 udelay((1 + 999 / HZ) * 1000);
955 barrier();
956 }
957 /* if reset did not complete, just complain */
958 if (!ticks) {
959 printk(KERN_ERR "IBM MCA SCSI: reset did not complete within %d seconds.\n", IM_RESET_DELAY);
960 reset_status(host_index) = IM_RESET_FINISHED_OK;
961 /* did not work, finish */
962 return 1;
963 }
964 /*if command succesful, break */
965 if (stat_result(host_index) == IM_IMMEDIATE_CMD_COMPLETED)
966 return 1;
967 }
968 if (retries >= 3)
969 return 0;
970 else
971 return 1;
972 }
973 #endif
974
975 /* type-interpreter for physical device numbers */
976 static char *ti_p(int dev)
977 {
978 switch (dev) {
979 case TYPE_IBM_SCSI_ADAPTER:
980 return ("A");
981 case TYPE_DISK:
982 return ("D");
983 case TYPE_TAPE:
984 return ("T");
985 case TYPE_PROCESSOR:
986 return ("P");
987 case TYPE_WORM:
988 return ("W");
989 case TYPE_ROM:
990 return ("R");
991 case TYPE_SCANNER:
992 return ("S");
993 case TYPE_MOD:
994 return ("M");
995 case TYPE_MEDIUM_CHANGER:
996 return ("C");
997 case TYPE_NO_LUN:
998 return ("+"); /* show NO_LUN */
999 }
1000 return ("-"); /* TYPE_NO_DEVICE and others */
1001 }
1002
1003 /* interpreter for logical device numbers (ldn) */
1004 static char *ti_l(int val)
1005 {
1006 const char hex[16] = "0123456789abcdef";
1007 static char answer[2];
1008
1009 answer[1] = (char) (0x0);
1010 if (val <= MAX_LOG_DEV)
1011 answer[0] = hex[val];
1012 else
1013 answer[0] = '-';
1014 return (char *) &answer;
1015 }
1016
1017 /* transfers bitpattern of the feature command to values in MHz */
1018 static char *ibmrate(unsigned int speed, int i)
1019 {
1020 switch (speed) {
1021 case 0:
1022 return i ? "5.00" : "10.00";
1023 case 1:
1024 return i ? "4.00" : "8.00";
1025 case 2:
1026 return i ? "3.33" : "6.66";
1027 case 3:
1028 return i ? "2.86" : "5.00";
1029 case 4:
1030 return i ? "2.50" : "4.00";
1031 case 5:
1032 return i ? "2.22" : "3.10";
1033 case 6:
1034 return i ? "2.00" : "2.50";
1035 case 7:
1036 return i ? "1.82" : "2.00";
1037 }
1038 return "---";
1039 }
1040
1041 static int probe_display(int what)
1042 {
1043 static int rotator = 0;
1044 const char rotor[] = "|/-\\";
1045
1046 if (!(display_mode & LED_DISP))
1047 return 0;
1048 if (!what) {
1049 outl(0x20202020, MOD95_LED_PORT);
1050 outl(0x20202020, MOD95_LED_PORT + 4);
1051 } else {
1052 outb('S', MOD95_LED_PORT + 7);
1053 outb('C', MOD95_LED_PORT + 6);
1054 outb('S', MOD95_LED_PORT + 5);
1055 outb('I', MOD95_LED_PORT + 4);
1056 outb('i', MOD95_LED_PORT + 3);
1057 outb('n', MOD95_LED_PORT + 2);
1058 outb('i', MOD95_LED_PORT + 1);
1059 outb((char) (rotor[rotator]), MOD95_LED_PORT);
1060 rotator++;
1061 if (rotator > 3)
1062 rotator = 0;
1063 }
1064 return 0;
1065 }
1066
1067 static int probe_bus_mode(int host_index)
1068 {
1069 struct im_pos_info *info;
1070 int num_bus = 0;
1071 int ldn;
1072
1073 info = (struct im_pos_info *) (&(ld(host_index)[MAX_LOG_DEV].buf));
1074 if (get_pos_info(host_index)) {
1075 if (info->connector_size & 0xf000)
1076 subsystem_connector_size(host_index) = 16;
1077 else
1078 subsystem_connector_size(host_index) = 32;
1079 num_bus |= (info->pos_4b & 8) >> 3;
1080 for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) {
1081 if ((special(host_index) == IBM_SCSI_WCACHE) || (special(host_index) == IBM_7568_WCACHE)) {
1082 if (!((info->cache_stat >> ldn) & 1))
1083 ld(host_index)[ldn].cache_flag = 0;
1084 }
1085 if (!((info->retry_stat >> ldn) & 1))
1086 ld(host_index)[ldn].retry_flag = 0;
1087 }
1088 #ifdef IM_DEBUG_PROBE
1089 printk("IBM MCA SCSI: SCSI-Cache bits: ");
1090 for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) {
1091 printk("%d", ld(host_index)[ldn].cache_flag);
1092 }
1093 printk("\nIBM MCA SCSI: SCSI-Retry bits: ");
1094 for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) {
1095 printk("%d", ld(host_index)[ldn].retry_flag);
1096 }
1097 printk("\n");
1098 #endif
1099 }
1100 return num_bus;
1101 }
1102
1103 /* probing scsi devices */
1104 static void check_devices(int host_index, int adaptertype)
1105 {
1106 int id, lun, ldn, ticks;
1107 int count_devices; /* local counter for connected device */
1108 int max_pun;
1109 int num_bus;
1110 int speedrun; /* local adapter_speed check variable */
1111
1112 /* assign default values to certain variables */
1113 ticks = 0;
1114 count_devices = 0;
1115 IBM_DS(host_index).dyn_flag = 0; /* normally no need for dynamical ldn management */
1116 IBM_DS(host_index).total_errors = 0; /* set errorcounter to 0 */
1117 next_ldn(host_index) = 7; /* next ldn to be assigned is 7, because 0-6 is 'hardwired' */
1118
1119 /* initialize the very important driver-informational arrays/structs */
1120 memset(ld(host_index), 0, sizeof(ld(host_index)));
1121 for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) {
1122 last_scsi_command(host_index)[ldn] = NO_SCSI; /* emptify last SCSI-command storage */
1123 last_scsi_type(host_index)[ldn] = 0;
1124 ld(host_index)[ldn].cache_flag = 1;
1125 ld(host_index)[ldn].retry_flag = 1;
1126 }
1127 memset(get_ldn(host_index), TYPE_NO_DEVICE, sizeof(get_ldn(host_index))); /* this is essential ! */
1128 memset(get_scsi(host_index), TYPE_NO_DEVICE, sizeof(get_scsi(host_index))); /* this is essential ! */
1129 for (lun = 0; lun < 8; lun++) {
1130 /* mark the adapter at its pun on all luns */
1131 get_scsi(host_index)[subsystem_pun(host_index)][lun] = TYPE_IBM_SCSI_ADAPTER;
1132 get_ldn(host_index)[subsystem_pun(host_index)][lun] = MAX_LOG_DEV; /* make sure, the subsystem
1133 ldn is active for all
1134 luns. */
1135 }
1136 probe_display(0); /* Supercool display usage during SCSI-probing. */
1137 /* This makes sense, when booting without any */
1138 /* monitor connected on model XX95. */
1139
1140 /* STEP 1: */
1141 adapter_speed(host_index) = global_adapter_speed;
1142 speedrun = adapter_speed(host_index);
1143 while (immediate_feature(host_index, speedrun, adapter_timeout) == 2) {
1144 probe_display(1);
1145 if (speedrun == 7)
1146 panic("IBM MCA SCSI: Cannot set Synchronous-Transfer-Rate!\n");
1147 speedrun++;
1148 if (speedrun > 7)
1149 speedrun = 7;
1150 }
1151 adapter_speed(host_index) = speedrun;
1152 /* Get detailed information about the current adapter, necessary for
1153 * device operations: */
1154 num_bus = probe_bus_mode(host_index);
1155
1156 /* num_bus contains only valid data for the F/W adapter! */
1157 if (adaptertype == IBM_SCSI2_FW) { /* F/W SCSI adapter: */
1158 /* F/W adapter PUN-space extension evaluation: */
1159 if (num_bus) {
1160 printk(KERN_INFO "IBM MCA SCSI: Separate bus mode (wide-addressing enabled)\n");
1161 subsystem_maxid(host_index) = 16;
1162 } else {
1163 printk(KERN_INFO "IBM MCA SCSI: Combined bus mode (wide-addressing disabled)\n");
1164 subsystem_maxid(host_index) = 8;
1165 }
1166 printk(KERN_INFO "IBM MCA SCSI: Sync.-Rate (F/W: 20, Int.: 10, Ext.: %s) MBytes/s\n", ibmrate(speedrun, adaptertype));
1167 } else /* all other IBM SCSI adapters: */
1168 printk(KERN_INFO "IBM MCA SCSI: Synchronous-SCSI-Transfer-Rate: %s MBytes/s\n", ibmrate(speedrun, adaptertype));
1169
1170 /* assign correct PUN device space */
1171 max_pun = subsystem_maxid(host_index);
1172
1173 #ifdef IM_DEBUG_PROBE
1174 printk("IBM MCA SCSI: Current SCSI-host index: %d\n", host_index);
1175 printk("IBM MCA SCSI: Removing default logical SCSI-device mapping.");
1176 #else
1177 printk(KERN_INFO "IBM MCA SCSI: Dev. Order: %s, Mapping (takes <2min): ", (ibm_ansi_order) ? "ANSI" : "New");
1178 #endif
1179 for (ldn = 0; ldn < MAX_LOG_DEV; ldn++) {
1180 probe_display(1);
1181 #ifdef IM_DEBUG_PROBE
1182 printk(".");
1183 #endif
1184 immediate_assign(host_index, 0, 0, ldn, REMOVE_LDN); /* remove ldn (wherever) */
1185 }
1186 lun = 0; /* default lun is 0 */
1187 #ifndef IM_DEBUG_PROBE
1188 printk("cleared,");
1189 #endif
1190 /* STEP 2: */
1191 #ifdef IM_DEBUG_PROBE
1192 printk("\nIBM MCA SCSI: Scanning SCSI-devices.");
1193 #endif
1194 for (id = 0; id < max_pun; id++)
1195 #ifdef CONFIG_SCSI_MULTI_LUN
1196 for (lun = 0; lun < 8; lun++)
1197 #endif
1198 {
1199 probe_display(1);
1200 #ifdef IM_DEBUG_PROBE
1201 printk(".");
1202 #endif
1203 if (id != subsystem_pun(host_index)) {
1204 /* if pun is not the adapter: */
1205 /* set ldn=0 to pun,lun */
1206 immediate_assign(host_index, id, lun, PROBE_LDN, SET_LDN);
1207 if (device_inquiry(host_index, PROBE_LDN)) { /* probe device */
1208 get_scsi(host_index)[id][lun] = (unsigned char) (ld(host_index)[PROBE_LDN].buf[0]);
1209 /* entry, even for NO_LUN */
1210 if (ld(host_index)[PROBE_LDN].buf[0] != TYPE_NO_LUN)
1211 count_devices++; /* a existing device is found */
1212 }
1213 /* remove ldn */
1214 immediate_assign(host_index, id, lun, PROBE_LDN, REMOVE_LDN);
1215 }
1216 }
1217 #ifndef IM_DEBUG_PROBE
1218 printk("scanned,");
1219 #endif
1220 /* STEP 3: */
1221 #ifdef IM_DEBUG_PROBE
1222 printk("\nIBM MCA SCSI: Mapping SCSI-devices.");
1223 #endif
1224 ldn = 0;
1225 lun = 0;
1226 #ifdef CONFIG_SCSI_MULTI_LUN
1227 for (lun = 0; lun < 8 && ldn < MAX_LOG_DEV; lun++)
1228 #endif
1229 for (id = 0; id < max_pun && ldn < MAX_LOG_DEV; id++) {
1230 probe_display(1);
1231 #ifdef IM_DEBUG_PROBE
1232 printk(".");
1233 #endif
1234 if (id != subsystem_pun(host_index)) {
1235 if (get_scsi(host_index)[id][lun] != TYPE_NO_LUN && get_scsi(host_index)[id][lun] != TYPE_NO_DEVICE) {
1236 /* Only map if accepted type. Always enter for
1237 lun == 0 to get no gaps into ldn-mapping for ldn<7. */
1238 immediate_assign(host_index, id, lun, ldn, SET_LDN);
1239 get_ldn(host_index)[id][lun] = ldn; /* map ldn */
1240 if (device_exists(host_index, ldn, &ld(host_index)[ldn].block_length, &ld(host_index)[ldn].device_type)) {
1241 #ifdef CONFIG_IBMMCA_SCSI_DEV_RESET
1242 printk("resetting device at ldn=%x ... ", ldn);
1243 immediate_reset(host_index, ldn);
1244 #endif
1245 ldn++;
1246 } else {
1247 /* device vanished, probably because we don't know how to
1248 * handle it or because it has problems */
1249 if (lun > 0) {
1250 /* remove mapping */
1251 get_ldn(host_index)[id][lun] = TYPE_NO_DEVICE;
1252 immediate_assign(host_index, 0, 0, ldn, REMOVE_LDN);
1253 } else
1254 ldn++;
1255 }
1256 } else if (lun == 0) {
1257 /* map lun == 0, even if no device exists */
1258 immediate_assign(host_index, id, lun, ldn, SET_LDN);
1259 get_ldn(host_index)[id][lun] = ldn; /* map ldn */
1260 ldn++;
1261 }
1262 }
1263 }
1264 /* STEP 4: */
1265
1266 /* map remaining ldns to non-existing devices */
1267 for (lun = 1; lun < 8 && ldn < MAX_LOG_DEV; lun++)
1268 for (id = 0; id < max_pun && ldn < MAX_LOG_DEV; id++) {
1269 if (get_scsi(host_index)[id][lun] == TYPE_NO_LUN || get_scsi(host_index)[id][lun] == TYPE_NO_DEVICE) {
1270 probe_display(1);
1271 /* Map remaining ldns only to NON-existing pun,lun
1272 combinations to make sure an inquiry will fail.
1273 For MULTI_LUN, it is needed to avoid adapter autonome
1274 SCSI-remapping. */
1275 immediate_assign(host_index, id, lun, ldn, SET_LDN);
1276 get_ldn(host_index)[id][lun] = ldn;
1277 ldn++;
1278 }
1279 }
1280 #ifndef IM_DEBUG_PROBE
1281 printk("mapped.");
1282 #endif
1283 printk("\n");
1284 #ifdef IM_DEBUG_PROBE
1285 if (ibm_ansi_order)
1286 printk("IBM MCA SCSI: Device order: IBM/ANSI (pun=7 is first).\n");
1287 else
1288 printk("IBM MCA SCSI: Device order: New Industry Standard (pun=0 is first).\n");
1289 #endif
1290
1291 #ifdef IM_DEBUG_PROBE
1292 /* Show the physical and logical mapping during boot. */
1293 printk("IBM MCA SCSI: Determined SCSI-device-mapping:\n");
1294 printk(" Physical SCSI-Device Map Logical SCSI-Device Map\n");
1295 printk("ID\\LUN 0 1 2 3 4 5 6 7 ID\\LUN 0 1 2 3 4 5 6 7\n");
1296 for (id = 0; id < max_pun; id++) {
1297 printk("%2d ", id);
1298 for (lun = 0; lun < 8; lun++)
1299 printk("%2s ", ti_p(get_scsi(host_index)[id][lun]));
1300 printk(" %2d ", id);
1301 for (lun = 0; lun < 8; lun++)
1302 printk("%2s ", ti_l(get_ldn(host_index)[id][lun]));
1303 printk("\n");
1304 }
1305 #endif
1306
1307 /* assign total number of found SCSI-devices to the statistics struct */
1308 IBM_DS(host_index).total_scsi_devices = count_devices;
1309
1310 /* decide for output in /proc-filesystem, if the configuration of
1311 SCSI-devices makes dynamical reassignment of devices necessary */
1312 if (count_devices >= MAX_LOG_DEV)
1313 IBM_DS(host_index).dyn_flag = 1; /* dynamical assignment is necessary */
1314 else
1315 IBM_DS(host_index).dyn_flag = 0; /* dynamical assignment is not necessary */
1316
1317 /* If no SCSI-devices are assigned, return 1 in order to cause message. */
1318 if (ldn == 0)
1319 printk("IBM MCA SCSI: Warning: No SCSI-devices found/assigned!\n");
1320
1321 /* reset the counters for statistics on the current adapter */
1322 IBM_DS(host_index).scbs = 0;
1323 IBM_DS(host_index).long_scbs = 0;
1324 IBM_DS(host_index).total_accesses = 0;
1325 IBM_DS(host_index).total_interrupts = 0;
1326 IBM_DS(host_index).dynamical_assignments = 0;
1327 memset(IBM_DS(host_index).ldn_access, 0x0, sizeof(IBM_DS(host_index).ldn_access));
1328 memset(IBM_DS(host_index).ldn_read_access, 0x0, sizeof(IBM_DS(host_index).ldn_read_access));
1329 memset(IBM_DS(host_index).ldn_write_access, 0x0, sizeof(IBM_DS(host_index).ldn_write_access));
1330 memset(IBM_DS(host_index).ldn_inquiry_access, 0x0, sizeof(IBM_DS(host_index).ldn_inquiry_access));
1331 memset(IBM_DS(host_index).ldn_modeselect_access, 0x0, sizeof(IBM_DS(host_index).ldn_modeselect_access));
1332 memset(IBM_DS(host_index).ldn_assignments, 0x0, sizeof(IBM_DS(host_index).ldn_assignments));
1333 probe_display(0);
1334 return;
1335 }
1336
1337 static int device_exists(int host_index, int ldn, int *block_length, int *device_type)
1338 {
1339 unsigned char *buf;
1340 /* if no valid device found, return immediately with 0 */
1341 if (!(device_inquiry(host_index, ldn)))
1342 return 0;
1343 buf = (unsigned char *) (&(ld(host_index)[ldn].buf));
1344 if (*buf == TYPE_ROM) {
1345 *device_type = TYPE_ROM;
1346 *block_length = 2048; /* (standard blocksize for yellow-/red-book) */
1347 return 1;
1348 }
1349 if (*buf == TYPE_WORM) {
1350 *device_type = TYPE_WORM;
1351 *block_length = 2048;
1352 return 1;
1353 }
1354 if (*buf == TYPE_DISK) {
1355 *device_type = TYPE_DISK;
1356 if (read_capacity(host_index, ldn)) {
1357 *block_length = *(buf + 7) + (*(buf + 6) << 8) + (*(buf + 5) << 16) + (*(buf + 4) << 24);
1358 return 1;
1359 } else
1360 return 0;
1361 }
1362 if (*buf == TYPE_MOD) {
1363 *device_type = TYPE_MOD;
1364 if (read_capacity(host_index, ldn)) {
1365 *block_length = *(buf + 7) + (*(buf + 6) << 8) + (*(buf + 5) << 16) + (*(buf + 4) << 24);
1366 return 1;
1367 } else
1368 return 0;
1369 }
1370 if (*buf == TYPE_TAPE) {
1371 *device_type = TYPE_TAPE;
1372 *block_length = 0; /* not in use (setting by mt and mtst in op.) */
1373 return 1;
1374 }
1375 if (*buf == TYPE_PROCESSOR) {
1376 *device_type = TYPE_PROCESSOR;
1377 *block_length = 0; /* they set their stuff on drivers */
1378 return 1;
1379 }
1380 if (*buf == TYPE_SCANNER) {
1381 *device_type = TYPE_SCANNER;
1382 *block_length = 0; /* they set their stuff on drivers */
1383 return 1;
1384 }
1385 if (*buf == TYPE_MEDIUM_CHANGER) {
1386 *device_type = TYPE_MEDIUM_CHANGER;
1387 *block_length = 0; /* One never knows, what to expect on a medium
1388 changer device. */
1389 return 1;
1390 }
1391 return 0;
1392 }
1393
1394 static void internal_ibmmca_scsi_setup(char *str, int *ints)
1395 {
1396 int i, j, io_base, id_base;
1397 char *token;
1398
1399 io_base = 0;
1400 id_base = 0;
1401 if (str) {
1402 j = 0;
1403 while ((token = strsep(&str, ",")) != NULL) {
1404 if (!strcmp(token, "activity"))
1405 display_mode |= LED_ACTIVITY;
1406 if (!strcmp(token, "display"))
1407 display_mode |= LED_DISP;
1408 if (!strcmp(token, "adisplay"))
1409 display_mode |= LED_ADISP;
1410 if (!strcmp(token, "normal"))
1411 ibm_ansi_order = 0;
1412 if (!strcmp(token, "ansi"))
1413 ibm_ansi_order = 1;
1414 if (!strcmp(token, "fast"))
1415 global_adapter_speed = 0;
1416 if (!strcmp(token, "medium"))
1417 global_adapter_speed = 4;
1418 if (!strcmp(token, "slow"))
1419 global_adapter_speed = 7;
1420 if ((*token == '-') || (isdigit(*token))) {
1421 if (!(j % 2) && (io_base < IM_MAX_HOSTS))
1422 io_port[io_base++] = simple_strtoul(token, NULL, 0);
1423 if ((j % 2) && (id_base < IM_MAX_HOSTS))
1424 scsi_id[id_base++] = simple_strtoul(token, NULL, 0);
1425 j++;
1426 }
1427 }
1428 } else if (ints) {
1429 for (i = 0; i < IM_MAX_HOSTS && 2 * i + 2 < ints[0]; i++) {
1430 io_port[i] = ints[2 * i + 2];
1431 scsi_id[i] = ints[2 * i + 2];
1432 }
1433 }
1434 return;
1435 }
1436
1437 static int ibmmca_getinfo(char *buf, int slot, void *dev_id)
1438 {
1439 struct Scsi_Host *shpnt;
1440 int len, speciale, connectore, k;
1441 unsigned int pos[8];
1442 unsigned long flags;
1443 struct Scsi_Host *dev = dev_id;
1444
1445 spin_lock_irqsave(dev->host_lock, flags);
1446
1447 shpnt = dev; /* assign host-structure to local pointer */
1448 len = 0; /* set filled text-buffer index to 0 */
1449 /* get the _special contents of the hostdata structure */
1450 speciale = ((struct ibmmca_hostdata *) shpnt->hostdata)->_special;
1451 connectore = ((struct ibmmca_hostdata *) shpnt->hostdata)->_connector_size;
1452 for (k = 2; k < 4; k++)
1453 pos[k] = ((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k];
1454 if (speciale == FORCED_DETECTION) { /* forced detection */
1455 len += sprintf(buf + len,
1456 "Adapter category: forced detected\n" "***************************************\n" "*** Forced detected SCSI Adapter ***\n" "*** No chip-information available ***\n" "***************************************\n");
1457 } else if (speciale == INTEGRATED_SCSI) {
1458 /* if the integrated subsystem has been found automatically: */
1459 len += sprintf(buf + len,
1460 "Adapter category: integrated\n" "Chip revision level: %d\n" "Chip status: %s\n" "8 kByte NVRAM status: %s\n", ((pos[2] & 0xf0) >> 4), (pos[2] & 1) ? "enabled" : "disabled", (pos[2] & 2) ? "locked" : "accessible");
1461 } else if ((speciale >= 0) && (speciale < (sizeof(subsys_list) / sizeof(struct subsys_list_struct)))) {
1462 /* if the subsystem is a slot adapter */
1463 len += sprintf(buf + len, "Adapter category: slot-card\n" "ROM Segment Address: ");
1464 if ((pos[2] & 0xf0) == 0xf0)
1465 len += sprintf(buf + len, "off\n");
1466 else
1467 len += sprintf(buf + len, "0x%x\n", ((pos[2] & 0xf0) << 13) + 0xc0000);
1468 len += sprintf(buf + len, "Chip status: %s\n", (pos[2] & 1) ? "enabled" : "disabled");
1469 len += sprintf(buf + len, "Adapter I/O Offset: 0x%x\n", ((pos[2] & 0x0e) << 2));
1470 } else {
1471 len += sprintf(buf + len, "Adapter category: unknown\n");
1472 }
1473 /* common subsystem information to write to the slotn file */
1474 len += sprintf(buf + len, "Subsystem PUN: %d\n", shpnt->this_id);
1475 len += sprintf(buf + len, "I/O base address range: 0x%x-0x%x\n", (unsigned int) (shpnt->io_port), (unsigned int) (shpnt->io_port + 7));
1476 len += sprintf(buf + len, "MCA-slot size: %d bits", connectore);
1477 /* Now make sure, the bufferlength is devidable by 4 to avoid
1478 * paging problems of the buffer. */
1479 while (len % sizeof(int) != (sizeof(int) - 1))
1480 len += sprintf(buf + len, " ");
1481 len += sprintf(buf + len, "\n");
1482
1483 spin_unlock_irqrestore(shpnt->host_lock, flags);
1484
1485 return len;
1486 }
1487
1488 int ibmmca_detect(Scsi_Host_Template * scsi_template)
1489 {
1490 struct Scsi_Host *shpnt;
1491 int port, id, i, j, k, list_size, slot;
1492 int devices_on_irq_11 = 0;
1493 int devices_on_irq_14 = 0;
1494 int IRQ14_registered = 0;
1495 int IRQ11_registered = 0;
1496
1497 found = 0; /* make absolutely sure, that found is set to 0 */
1498
1499 /* First of all, print the version number of the driver. This is
1500 * important to allow better user bugreports in case of already
1501 * having problems with the MCA_bus probing. */
1502 printk(KERN_INFO "IBM MCA SCSI: Version %s\n", IBMMCA_SCSI_DRIVER_VERSION);
1503 /* if this is not MCA machine, return "nothing found" */
1504 if (!MCA_bus) {
1505 printk(KERN_INFO "IBM MCA SCSI: No Microchannel-bus present --> Aborting.\n" " This machine does not have any IBM MCA-bus\n" " or the MCA-Kernel-support is not enabled!\n");
1506 return 0;
1507 }
1508
1509 #ifdef MODULE
1510 /* If the driver is run as module, read from conf.modules or cmd-line */
1511 if (boot_options)
1512 option_setup(boot_options);
1513 #endif
1514
1515 /* get interrupt request level */
1516 if (request_irq(IM_IRQ, interrupt_handler, SA_SHIRQ, "ibmmcascsi", hosts)) {
1517 printk(KERN_ERR "IBM MCA SCSI: Unable to get shared IRQ %d.\n", IM_IRQ);
1518 return 0;
1519 } else
1520 IRQ14_registered++;
1521
1522 /* if ibmmcascsi setup option was passed to kernel, return "found" */
1523 for (i = 0; i < IM_MAX_HOSTS; i++)
1524 if (io_port[i] > 0 && scsi_id[i] >= 0 && scsi_id[i] < 8) {
1525 printk("IBM MCA SCSI: forced detected SCSI Adapter, io=0x%x, scsi id=%d.\n", io_port[i], scsi_id[i]);
1526 if ((shpnt = ibmmca_register(scsi_template, io_port[i], scsi_id[i], FORCED_DETECTION, "forced detected SCSI Adapter"))) {
1527 for (k = 2; k < 7; k++)
1528 ((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k] = 0;
1529 ((struct ibmmca_hostdata *) shpnt->hostdata)->_special = FORCED_DETECTION;
1530 mca_set_adapter_name(MCA_INTEGSCSI, "forced detected SCSI Adapter");
1531 mca_set_adapter_procfn(MCA_INTEGSCSI, (MCA_ProcFn) ibmmca_getinfo, shpnt);
1532 mca_mark_as_used(MCA_INTEGSCSI);
1533 devices_on_irq_14++;
1534 }
1535 }
1536 if (found)
1537 return found;
1538
1539 /* The POS2-register of all PS/2 model SCSI-subsystems has the following
1540 * interpretation of bits:
1541 * Bit 7 - 4 : Chip Revision ID (Release)
1542 * Bit 3 - 2 : Reserved
1543 * Bit 1 : 8k NVRAM Disabled
1544 * Bit 0 : Chip Enable (EN-Signal)
1545 * The POS3-register is interpreted as follows:
1546 * Bit 7 - 5 : SCSI ID
1547 * Bit 4 : Reserved = 0
1548 * Bit 3 - 0 : Reserved = 0
1549 * (taken from "IBM, PS/2 Hardware Interface Technical Reference, Common
1550 * Interfaces (1991)").
1551 * In short words, this means, that IBM PS/2 machines only support
1552 * 1 single subsystem by default. The slot-adapters must have another
1553 * configuration on pos2. Here, one has to assume the following
1554 * things for POS2-register:
1555 * Bit 7 - 4 : Chip Revision ID (Release)
1556 * Bit 3 - 1 : port offset factor
1557 * Bit 0 : Chip Enable (EN-Signal)
1558 * As I found a patch here, setting the IO-registers to 0x3540 forced,
1559 * as there was a 0x05 in POS2 on a model 56, I assume, that the
1560 * port 0x3540 must be fix for integrated SCSI-controllers.
1561 * Ok, this discovery leads to the following implementation: (M.Lang) */
1562
1563 /* first look for the IBM SCSI integrated subsystem on the motherboard */
1564 for (j = 0; j < 8; j++) /* read the pos-information */
1565 pos[j] = mca_read_stored_pos(MCA_INTEGSCSI, j);
1566 /* pos2 = pos3 = 0xff if there is no integrated SCSI-subsystem present, but
1567 * if we ignore the settings of all surrounding pos registers, it is not
1568 * completely sufficient to only check pos2 and pos3. */
1569 /* Therefore, now the following if statement is used to
1570 * make sure, we see a real integrated onboard SCSI-interface and no
1571 * internal system information, which gets mapped to some pos registers
1572 * on models 95xx. */
1573 if ((!pos[0] && !pos[1] && pos[2] > 0 && pos[3] > 0 && !pos[4] && !pos[5] && !pos[6] && !pos[7]) || (pos[0] == 0xff && pos[1] == 0xff && pos[2] < 0xff && pos[3] < 0xff && pos[4] == 0xff && pos[5] == 0xff && pos[6] == 0xff && pos[7] == 0xff)) {
1574 if ((pos[2] & 1) == 1) /* is the subsystem chip enabled ? */
1575 port = IM_IO_PORT;
1576 else { /* if disabled, no IRQs will be generated, as the chip won't
1577 * listen to the incoming commands and will do really nothing,
1578 * except for listening to the pos-register settings. If this
1579 * happens, I need to hugely think about it, as one has to
1580 * write something to the MCA-Bus pos register in order to
1581 * enable the chip. Normally, IBM-SCSI won't pass the POST,
1582 * when the chip is disabled (see IBM tech. ref.). */
1583 port = IM_IO_PORT; /* anyway, set the portnumber and warn */
1584 printk("IBM MCA SCSI: WARNING - Your SCSI-subsystem is disabled!\n" " SCSI-operations may not work.\n");
1585 }
1586 id = (pos[3] & 0xe0) >> 5; /* this is correct and represents the PUN */
1587 /* give detailed information on the subsystem. This helps me
1588 * additionally during debugging and analyzing bug-reports. */
1589 printk(KERN_INFO "IBM MCA SCSI: IBM Integrated SCSI Controller ffound, io=0x%x, scsi id=%d,\n", port, id);
1590 printk(KERN_INFO " chip rev.=%d, 8K NVRAM=%s, subsystem=%s\n", ((pos[2] & 0xf0) >> 4), (pos[2] & 2) ? "locked" : "accessible", (pos[2] & 1) ? "enabled." : "disabled.");
1591
1592 /* register the found integrated SCSI-subsystem */
1593 if ((shpnt = ibmmca_register(scsi_template, port, id, INTEGRATED_SCSI, "IBM Integrated SCSI Controller")))
1594 {
1595 for (k = 2; k < 7; k++)
1596 ((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k] = pos[k];
1597 ((struct ibmmca_hostdata *) shpnt->hostdata)->_special = INTEGRATED_SCSI;
1598 mca_set_adapter_name(MCA_INTEGSCSI, "IBM Integrated SCSI Controller");
1599 mca_set_adapter_procfn(MCA_INTEGSCSI, (MCA_ProcFn) ibmmca_getinfo, shpnt);
1600 mca_mark_as_used(MCA_INTEGSCSI);
1601 devices_on_irq_14++;
1602 }
1603 }
1604
1605 /* now look for other adapters in MCA slots, */
1606 /* determine the number of known IBM-SCSI-subsystem types */
1607 /* see the pos[2] dependence to get the adapter port-offset. */
1608 list_size = sizeof(subsys_list) / sizeof(struct subsys_list_struct);
1609 for (i = 0; i < list_size; i++) {
1610 /* scan each slot for a fitting adapter id */
1611 slot = 0; /* start at slot 0 */
1612 while ((slot = mca_find_adapter(subsys_list[i].mca_id, slot))
1613 != MCA_NOTFOUND) { /* scan through all slots */
1614 for (j = 0; j < 8; j++) /* read the pos-information */
1615 pos[j] = mca_read_stored_pos(slot, j);
1616 if ((pos[2] & 1) == 1)
1617 /* is the subsystem chip enabled ? */
1618 /* (explanations see above) */
1619 port = IM_IO_PORT + ((pos[2] & 0x0e) << 2);
1620 else {
1621 /* anyway, set the portnumber and warn */
1622 port = IM_IO_PORT + ((pos[2] & 0x0e) << 2);
1623 printk(KERN_WARNING "IBM MCA SCSI: WARNING - Your SCSI-subsystem is disabled!\n");
1624 printk(KERN_WARNING " SCSI-operations may not work.\n");
1625 }
1626 if ((i == IBM_SCSI2_FW) && (pos[6] != 0)) {
1627 printk(KERN_ERR "IBM MCA SCSI: ERROR - Wrong POS(6)-register setting!\n");
1628 printk(KERN_ERR " Impossible to determine adapter PUN!\n");
1629 printk(KERN_ERR " Guessing adapter PUN = 7.\n");
1630 id = 7;
1631 } else {
1632 id = (pos[3] & 0xe0) >> 5; /* get subsystem PUN */
1633 if (i == IBM_SCSI2_FW) {
1634 id |= (pos[3] & 0x10) >> 1; /* get subsystem PUN high-bit
1635 * for F/W adapters */
1636 }
1637 }
1638 if ((i == IBM_SCSI2_FW) && (pos[4] & 0x01) && (pos[6] == 0)) {
1639 /* IRQ11 is used by SCSI-2 F/W Adapter/A */
1640 printk(KERN_DEBUG "IBM MCA SCSI: SCSI-2 F/W adapter needs IRQ 11.\n");
1641 /* get interrupt request level */
1642 if (request_irq(IM_IRQ_FW, interrupt_handler, SA_SHIRQ, "ibmmcascsi", hosts)) {
1643 printk(KERN_ERR "IBM MCA SCSI: Unable to get shared IRQ %d.\n", IM_IRQ_FW);
1644 } else
1645 IRQ11_registered++;
1646 }
1647 printk(KERN_INFO "IBM MCA SCSI: %s found in slot %d, io=0x%x, scsi id=%d,\n", subsys_list[i].description, slot + 1, port, id);
1648 if ((pos[2] & 0xf0) == 0xf0)
1649 printk(KERN_DEBUG" ROM Addr.=off,");
1650 else
1651 printk(KERN_DEBUG " ROM Addr.=0x%x,", ((pos[2] & 0xf0) << 13) + 0xc0000);
1652 printk(KERN_DEBUG " port-offset=0x%x, subsystem=%s\n", ((pos[2] & 0x0e) << 2), (pos[2] & 1) ? "enabled." : "disabled.");
1653
1654 /* register the hostadapter */
1655 if ((shpnt = ibmmca_register(scsi_template, port, id, i, subsys_list[i].description))) {
1656 for (k = 2; k < 8; k++)
1657 ((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k] = pos[k];
1658 ((struct ibmmca_hostdata *) shpnt->hostdata)->_special = i;
1659 mca_set_adapter_name(slot, subsys_list[i].description);
1660 mca_set_adapter_procfn(slot, (MCA_ProcFn) ibmmca_getinfo, shpnt);
1661 mca_mark_as_used(slot);
1662 if ((i == IBM_SCSI2_FW) && (pos[4] & 0x01) && (pos[6] == 0))
1663 devices_on_irq_11++;
1664 else
1665 devices_on_irq_14++;
1666 }
1667 slot++; /* advance to next slot */
1668 } /* advance to next adapter id in the list of IBM-SCSI-subsystems */
1669 }
1670
1671 /* now check for SCSI-adapters, mapped to the integrated SCSI
1672 * area. E.g. a W/Cache in MCA-slot 9(!). Do the check correct here,
1673 * as this is a known effect on some models 95xx. */
1674 list_size = sizeof(subsys_list) / sizeof(struct subsys_list_struct);
1675 for (i = 0; i < list_size; i++) {
1676 /* scan each slot for a fitting adapter id */
1677 slot = mca_find_adapter(subsys_list[i].mca_id, MCA_INTEGSCSI);
1678 if (slot != MCA_NOTFOUND) { /* scan through all slots */
1679 for (j = 0; j < 8; j++) /* read the pos-information */
1680 pos[j] = mca_read_stored_pos(slot, j);
1681 if ((pos[2] & 1) == 1) { /* is the subsystem chip enabled ? */
1682 /* (explanations see above) */
1683 port = IM_IO_PORT + ((pos[2] & 0x0e) << 2);
1684 } else { /* anyway, set the portnumber and warn */
1685 port = IM_IO_PORT + ((pos[2] & 0x0e) << 2);
1686 printk(KERN_WARNING "IBM MCA SCSI: WARNING - Your SCSI-subsystem is disabled!\n");
1687 printk(KERN_WARNING " SCSI-operations may not work.\n");
1688 }
1689 if ((i == IBM_SCSI2_FW) && (pos[6] != 0)) {
1690 printk(KERN_ERR "IBM MCA SCSI: ERROR - Wrong POS(6)-register setting!\n");
1691 printk(KERN_ERR " Impossible to determine adapter PUN!\n");
1692 printk(KERN_ERR " Guessing adapter PUN = 7.\n");
1693 id = 7;
1694 } else {
1695 id = (pos[3] & 0xe0) >> 5; /* get subsystem PUN */
1696 if (i == IBM_SCSI2_FW)
1697 id |= (pos[3] & 0x10) >> 1; /* get subsystem PUN high-bit
1698 * for F/W adapters */
1699 }
1700 if ((i == IBM_SCSI2_FW) && (pos[4] & 0x01) && (pos[6] == 0)) {
1701 /* IRQ11 is used by SCSI-2 F/W Adapter/A */
1702 printk(KERN_DEBUG "IBM MCA SCSI: SCSI-2 F/W adapter needs IRQ 11.\n");
1703 /* get interrupt request level */
1704 if (request_irq(IM_IRQ_FW, interrupt_handler, SA_SHIRQ, "ibmmcascsi", hosts))
1705 printk(KERN_ERR "IBM MCA SCSI: Unable to get shared IRQ %d.\n", IM_IRQ_FW);
1706 else
1707 IRQ11_registered++;
1708 }
1709 printk(KERN_INFO "IBM MCA SCSI: %s found in slot %d, io=0x%x, scsi id=%d,\n", subsys_list[i].description, slot + 1, port, id);
1710 if ((pos[2] & 0xf0) == 0xf0)
1711 printk(KERN_DEBUG " ROM Addr.=off,");
1712 else
1713 printk(KERN_DEBUG " ROM Addr.=0x%x,", ((pos[2] & 0xf0) << 13) + 0xc0000);
1714 printk(KERN_DEBUG " port-offset=0x%x, subsystem=%s\n", ((pos[2] & 0x0e) << 2), (pos[2] & 1) ? "enabled." : "disabled.");
1715
1716 /* register the hostadapter */
1717 if ((shpnt = ibmmca_register(scsi_template, port, id, i, subsys_list[i].description))) {
1718 for (k = 2; k < 7; k++)
1719 ((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k] = pos[k];
1720 ((struct ibmmca_hostdata *) shpnt->hostdata)->_special = i;
1721 mca_set_adapter_name(slot, subsys_list[i].description);
1722 mca_set_adapter_procfn(slot, (MCA_ProcFn) ibmmca_getinfo, shpnt);
1723 mca_mark_as_used(slot);
1724 if ((i == IBM_SCSI2_FW) && (pos[4] & 0x01) && (pos[6] == 0))
1725 devices_on_irq_11++;
1726 else
1727 devices_on_irq_14++;
1728 }
1729 slot++; /* advance to next slot */
1730 } /* advance to next adapter id in the list of IBM-SCSI-subsystems */
1731 }
1732 if (IRQ11_registered && !devices_on_irq_11)
1733 free_irq(IM_IRQ_FW, hosts); /* no devices on IRQ 11 */
1734 if (IRQ14_registered && !devices_on_irq_14)
1735 free_irq(IM_IRQ, hosts); /* no devices on IRQ 14 */
1736 if (!devices_on_irq_11 && !devices_on_irq_14)
1737 printk(KERN_WARNING "IBM MCA SCSI: No IBM SCSI-subsystem adapter attached.\n");
1738 return found; /* return the number of found SCSI hosts. Should be 1 or 0. */
1739 }
1740
1741 static struct Scsi_Host *ibmmca_register(Scsi_Host_Template * scsi_template, int port, int id, int adaptertype, char *hostname)
1742 {
1743 struct Scsi_Host *shpnt;
1744 int i, j;
1745 unsigned int ctrl;
1746
1747 /* check I/O region */
1748 if (!request_region(port, IM_N_IO_PORT, hostname)) {
1749 printk(KERN_ERR "IBM MCA SCSI: Unable to get I/O region 0x%x-0x%x (%d ports).\n", port, port + IM_N_IO_PORT - 1, IM_N_IO_PORT);
1750 return NULL;
1751 }
1752
1753 /* register host */
1754 shpnt = scsi_register(scsi_template, sizeof(struct ibmmca_hostdata));
1755 if (!shpnt) {
1756 printk(KERN_ERR "IBM MCA SCSI: Unable to register host.\n");
1757 release_region(port, IM_N_IO_PORT);
1758 return NULL;
1759 }
1760
1761 /* request I/O region */
1762 hosts[found] = shpnt; /* add new found hostadapter to the list */
1763 special(found) = adaptertype; /* important assignment or else crash! */
1764 subsystem_connector_size(found) = 0; /* preset slot-size */
1765 shpnt->irq = IM_IRQ; /* assign necessary stuff for the adapter */
1766 shpnt->io_port = port;
1767 shpnt->n_io_port = IM_N_IO_PORT;
1768 shpnt->this_id = id;
1769 shpnt->max_id = 8; /* 8 PUNs are default */
1770 /* now, the SCSI-subsystem is connected to Linux */
1771
1772 ctrl = (unsigned int) (inb(IM_CTR_REG(found))); /* get control-register status */
1773 #ifdef IM_DEBUG_PROBE
1774 printk("IBM MCA SCSI: Control Register contents: %x, status: %x\n", ctrl, inb(IM_STAT_REG(found)));
1775 printk("IBM MCA SCSI: This adapters' POS-registers: ");
1776 for (i = 0; i < 8; i++)
1777 printk("%x ", pos[i]);
1778 printk("\n");
1779 #endif
1780 reset_status(found) = IM_RESET_NOT_IN_PROGRESS;
1781
1782 for (i = 0; i < 16; i++) /* reset the tables */
1783 for (j = 0; j < 8; j++)
1784 get_ldn(found)[i][j] = MAX_LOG_DEV;
1785
1786 /* check which logical devices exist */
1787 /* after this line, local interrupting is possible: */
1788 local_checking_phase_flag(found) = 1;
1789 check_devices(found, adaptertype); /* call by value, using the global variable hosts */
1790 local_checking_phase_flag(found) = 0;
1791 found++; /* now increase index to be prepared for next found subsystem */
1792 /* an ibm mca subsystem has been detected */
1793 return shpnt;
1794 }
1795
1796 static int ibmmca_release(struct Scsi_Host *shpnt)
1797 {
1798 release_region(shpnt->io_port, shpnt->n_io_port);
1799 if (!(--found))
1800 free_irq(shpnt->irq, hosts);
1801 return 0;
1802 }
1803
1804 /* The following routine is the SCSI command queue for the midlevel driver */
1805 static int ibmmca_queuecommand(Scsi_Cmnd * cmd, void (*done) (Scsi_Cmnd *))
1806 {
1807 unsigned int ldn;
1808 unsigned int scsi_cmd;
1809 struct im_scb *scb;
1810 struct Scsi_Host *shpnt;
1811 int current_ldn;
1812 int id, lun;
1813 int target;
1814 int host_index;
1815 int max_pun;
1816 int i;
1817 struct scatterlist *sl;
1818
1819 shpnt = cmd->device->host;
1820 /* search for the right hostadapter */
1821 for (host_index = 0; hosts[host_index] && hosts[host_index]->host_no != shpnt->host_no; host_index++);
1822
1823 if (!hosts[host_index]) { /* invalid hostadapter descriptor address */
1824 cmd->result = DID_NO_CONNECT << 16;
1825 if (done)
1826 done(cmd);
1827 return 0;
1828 }
1829 max_pun = subsystem_maxid(host_index);
1830 if (ibm_ansi_order) {
1831 target = max_pun - 1 - cmd->device->id;
1832 if ((target <= subsystem_pun(host_index)) && (cmd->device->id <= subsystem_pun(host_index)))
1833 target--;
1834 else if ((target >= subsystem_pun(host_index)) && (cmd->device->id >= subsystem_pun(host_index)))
1835 target++;
1836 } else
1837 target = cmd->device->id;
1838
1839 /* if (target,lun) is NO LUN or not existing at all, return error */
1840 if ((get_scsi(host_index)[target][cmd->device->lun] == TYPE_NO_LUN) || (get_scsi(host_index)[target][cmd->device->lun] == TYPE_NO_DEVICE)) {
1841 cmd->result = DID_NO_CONNECT << 16;
1842 if (done)
1843 done(cmd);
1844 return 0;
1845 }
1846
1847 /*if (target,lun) unassigned, do further checks... */
1848 ldn = get_ldn(host_index)[target][cmd->device->lun];
1849 if (ldn >= MAX_LOG_DEV) { /* on invalid ldn do special stuff */
1850 if (ldn > MAX_LOG_DEV) { /* dynamical remapping if ldn unassigned */
1851 current_ldn = next_ldn(host_index); /* stop-value for one circle */
1852 while (ld(host_index)[next_ldn(host_index)].cmd) { /* search for a occupied, but not in */
1853 /* command-processing ldn. */
1854 next_ldn(host_index)++;
1855 if (next_ldn(host_index) >= MAX_LOG_DEV)
1856 next_ldn(host_index) = 7;
1857 if (current_ldn == next_ldn(host_index)) { /* One circle done ? */
1858 /* no non-processing ldn found */
1859 printk("IBM MCA SCSI: Cannot assign SCSI-device dynamically!\n" " On ldn 7-14 SCSI-commands everywhere in progress.\n" " Reporting DID_NO_CONNECT for device (%d,%d).\n", target, cmd->device->lun);
1860 cmd->result = DID_NO_CONNECT << 16; /* return no connect */
1861 if (done)
1862 done(cmd);
1863 return 0;
1864 }
1865 }
1866
1867 /* unmap non-processing ldn */
1868 for (id = 0; id < max_pun; id++)
1869 for (lun = 0; lun < 8; lun++) {
1870 if (get_ldn(host_index)[id][lun] == next_ldn(host_index)) {
1871 get_ldn(host_index)[id][lun] = TYPE_NO_DEVICE;
1872 get_scsi(host_index)[id][lun] = TYPE_NO_DEVICE;
1873 /* unmap entry */
1874 }
1875 }
1876 /* set reduced interrupt_handler-mode for checking */
1877 local_checking_phase_flag(host_index) = 1;
1878 /* map found ldn to pun,lun */
1879 get_ldn(host_index)[target][cmd->device->lun] = next_ldn(host_index);
1880 /* change ldn to the right value, that is now next_ldn */
1881 ldn = next_ldn(host_index);
1882 /* unassign all ldns (pun,lun,ldn does not matter for remove) */
1883 immediate_assign(host_index, 0, 0, 0, REMOVE_LDN);
1884 /* set only LDN for remapped device */
1885 immediate_assign(host_index, target, cmd->device->lun, ldn, SET_LDN);
1886 /* get device information for ld[ldn] */
1887 if (device_exists(host_index, ldn, &ld(host_index)[ldn].block_length, &ld(host_index)[ldn].device_type)) {
1888 ld(host_index)[ldn].cmd = NULL; /* To prevent panic set 0, because
1889 devices that were not assigned,
1890 should have nothing in progress. */
1891 get_scsi(host_index)[target][cmd->device->lun] = ld(host_index)[ldn].device_type;
1892 /* increase assignment counters for statistics in /proc */
1893 IBM_DS(host_index).dynamical_assignments++;
1894 IBM_DS(host_index).ldn_assignments[ldn]++;
1895 } else
1896 /* panic here, because a device, found at boottime has
1897 vanished */
1898 panic("IBM MCA SCSI: ldn=0x%x, SCSI-device on (%d,%d) vanished!\n", ldn, target, cmd->device->lun);
1899 /* unassign again all ldns (pun,lun,ldn does not matter for remove) */
1900 immediate_assign(host_index, 0, 0, 0, REMOVE_LDN);
1901 /* remap all ldns, as written in the pun/lun table */
1902 lun = 0;
1903 #ifdef CONFIG_SCSI_MULTI_LUN
1904 for (lun = 0; lun < 8; lun++)
1905 #endif
1906 for (id = 0; id < max_pun; id++) {
1907 if (get_ldn(host_index)[id][lun] <= MAX_LOG_DEV)
1908 immediate_assign(host_index, id, lun, get_ldn(host_index)[id][lun], SET_LDN);
1909 }
1910 /* set back to normal interrupt_handling */
1911 local_checking_phase_flag(host_index) = 0;
1912 #ifdef IM_DEBUG_PROBE
1913 /* Information on syslog terminal */
1914 printk("IBM MCA SCSI: ldn=0x%x dynamically reassigned to (%d,%d).\n", ldn, target, cmd->device->lun);
1915 #endif
1916 /* increase next_ldn for next dynamical assignment */
1917 next_ldn(host_index)++;
1918 if (next_ldn(host_index) >= MAX_LOG_DEV)
1919 next_ldn(host_index) = 7;
1920 } else { /* wall against Linux accesses to the subsystem adapter */
1921 cmd->result = DID_BAD_TARGET << 16;
1922 if (done)
1923 done(cmd);
1924 return 0;
1925 }
1926 }
1927
1928 /*verify there is no command already in progress for this log dev */
1929 if (ld(host_index)[ldn].cmd)
1930 panic("IBM MCA SCSI: cmd already in progress for this ldn.\n");
1931
1932 /*save done in cmd, and save cmd for the interrupt handler */
1933 cmd->scsi_done = done;
1934 ld(host_index)[ldn].cmd = cmd;
1935
1936 /*fill scb information independent of the scsi command */
1937 scb = &(ld(host_index)[ldn].scb);
1938 ld(host_index)[ldn].tsb.dev_status = 0;
1939 scb->enable = IM_REPORT_TSB_ONLY_ON_ERROR | IM_RETRY_ENABLE;
1940 scb->tsb_adr = isa_virt_to_bus(&(ld(host_index)[ldn].tsb));
1941 scsi_cmd = cmd->cmnd[0];
1942
1943 if (cmd->use_sg) {
1944 i = cmd->use_sg;
1945 sl = (struct scatterlist *) (cmd->request_buffer);
1946 if (i > 16)
1947 panic("IBM MCA SCSI: scatter-gather list too long.\n");
1948 while (--i >= 0) {
1949 ld(host_index)[ldn].sge[i].address = (void *) (isa_page_to_bus(sl[i].page) + sl[i].offset);
1950 ld(host_index)[ldn].sge[i].byte_length = sl[i].length;
1951 }
1952 scb->enable |= IM_POINTER_TO_LIST;
1953 scb->sys_buf_adr = isa_virt_to_bus(&(ld(host_index)[ldn].sge[0]));
1954 scb->sys_buf_length = cmd->use_sg * sizeof(struct im_sge);
1955 } else {
1956 scb->sys_buf_adr = isa_virt_to_bus(cmd->request_buffer);
1957 /* recent Linux midlevel SCSI places 1024 byte for inquiry
1958 * command. Far too much for old PS/2 hardware. */
1959 switch (scsi_cmd) {
1960 /* avoid command errors by setting bufferlengths to
1961 * ANSI-standard. Beware of forcing it to 255,
1962 * this could SEGV the kernel!!! */
1963 case INQUIRY:
1964 case REQUEST_SENSE:
1965 case MODE_SENSE:
1966 case MODE_SELECT:
1967 if (cmd->request_bufflen > 255)
1968 scb->sys_buf_length = 255;
1969 else
1970 scb->sys_buf_length = cmd->request_bufflen;
1971 break;
1972 case TEST_UNIT_READY:
1973 scb->sys_buf_length = 0;
1974 break;
1975 default:
1976 scb->sys_buf_length = cmd->request_bufflen;
1977 break;
1978 }
1979 }
1980 /*fill scb information dependent on scsi command */
1981
1982 #ifdef IM_DEBUG_CMD
1983 printk("issue scsi cmd=%02x to ldn=%d\n", scsi_cmd, ldn);
1984 #endif
1985
1986 /* for specific device-type debugging: */
1987 #ifdef IM_DEBUG_CMD_SPEC_DEV
1988 if (ld(host_index)[ldn].device_type == IM_DEBUG_CMD_DEVICE)
1989 printk("(SCSI-device-type=0x%x) issue scsi cmd=%02x to ldn=%d\n", ld(host_index)[ldn].device_type, scsi_cmd, ldn);
1990 #endif
1991
1992 /* for possible panics store current command */
1993 last_scsi_command(host_index)[ldn] = scsi_cmd;
1994 last_scsi_type(host_index)[ldn] = IM_SCB;
1995 /* update statistical info */
1996 IBM_DS(host_index).total_accesses++;
1997 IBM_DS(host_index).ldn_access[ldn]++;
1998
1999 switch (scsi_cmd) {
2000 case READ_6:
2001 case WRITE_6:
2002 case READ_10:
2003 case WRITE_10:
2004 case READ_12:
2005 case WRITE_12:
2006 /* Distinguish between disk and other devices. Only disks (that are the
2007 most frequently accessed devices) should be supported by the
2008 IBM-SCSI-Subsystem commands. */
2009 switch (ld(host_index)[ldn].device_type) {
2010 case TYPE_DISK: /* for harddisks enter here ... */
2011 case TYPE_MOD: /* ... try it also for MO-drives (send flames as */
2012 /* you like, if this won't work.) */
2013 if (scsi_cmd == READ_6 || scsi_cmd == READ_10 || scsi_cmd == READ_12) {
2014 /* read command preparations */
2015 scb->enable |= IM_READ_CONTROL;
2016 IBM_DS(host_index).ldn_read_access[ldn]++; /* increase READ-access on ldn stat. */
2017 scb->command = IM_READ_DATA_CMD | IM_NO_DISCONNECT;
2018 } else { /* write command preparations */
2019 IBM_DS(host_index).ldn_write_access[ldn]++; /* increase write-count on ldn stat. */
2020 scb->command = IM_WRITE_DATA_CMD | IM_NO_DISCONNECT;
2021 }
2022 if (scsi_cmd == READ_6 || scsi_cmd == WRITE_6) {
2023 scb->u1.log_blk_adr = (((unsigned) cmd->cmnd[3]) << 0) | (((unsigned) cmd->cmnd[2]) << 8) | ((((unsigned) cmd->cmnd[1]) & 0x1f) << 16);
2024 scb->u2.blk.count = (unsigned) cmd->cmnd[4];
2025 } else {
2026 scb->u1.log_blk_adr = (((unsigned) cmd->cmnd[5]) << 0) | (((unsigned) cmd->cmnd[4]) << 8) | (((unsigned) cmd->cmnd[3]) << 16) | (((unsigned) cmd->cmnd[2]) << 24);
2027 scb->u2.blk.count = (((unsigned) cmd->cmnd[8]) << 0) | (((unsigned) cmd->cmnd[7]) << 8);
2028 }
2029 last_scsi_logical_block(host_index)[ldn] = scb->u1.log_blk_adr;
2030 last_scsi_blockcount(host_index)[ldn] = scb->u2.blk.count;
2031 scb->u2.blk.length = ld(host_index)[ldn].block_length;
2032 break;
2033 /* for other devices, enter here. Other types are not known by
2034 Linux! TYPE_NO_LUN is forbidden as valid device. */
2035 case TYPE_ROM:
2036 case TYPE_TAPE:
2037 case TYPE_PROCESSOR:
2038 case TYPE_WORM:
2039 case TYPE_SCANNER:
2040 case TYPE_MEDIUM_CHANGER:
2041 /* If there is a sequential-device, IBM recommends to use
2042 IM_OTHER_SCSI_CMD_CMD instead of subsystem READ/WRITE.
2043 This includes CD-ROM devices, too, due to the partial sequential
2044 read capabilities. */
2045 scb->command = IM_OTHER_SCSI_CMD_CMD;
2046 if (scsi_cmd == READ_6 || scsi_cmd == READ_10 || scsi_cmd == READ_12)
2047 /* enable READ */
2048 scb->enable |= IM_READ_CONTROL;
2049 scb->enable |= IM_BYPASS_BUFFER;
2050 scb->u1.scsi_cmd_length = cmd->cmd_len;
2051 memcpy(scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len);
2052 last_scsi_type(host_index)[ldn] = IM_LONG_SCB;
2053 /* Read/write on this non-disk devices is also displayworthy,
2054 so flash-up the LED/display. */
2055 break;
2056 }
2057 break;
2058 case INQUIRY:
2059 IBM_DS(host_index).ldn_inquiry_access[ldn]++;
2060 scb->command = IM_DEVICE_INQUIRY_CMD;
2061 scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER;
2062 scb->u1.log_blk_adr = 0;
2063 break;
2064 case TEST_UNIT_READY:
2065 scb->command = IM_OTHER_SCSI_CMD_CMD;
2066 scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER;
2067 scb->u1.log_blk_adr = 0;
2068 scb->u1.scsi_cmd_length = 6;
2069 memcpy(scb->u2.scsi_command, cmd->cmnd, 6);
2070 last_scsi_type(host_index)[ldn] = IM_LONG_SCB;
2071 break;
2072 case READ_CAPACITY:
2073 /* the length of system memory buffer must be exactly 8 bytes */
2074 scb->command = IM_READ_CAPACITY_CMD;
2075 scb->enable |= IM_READ_CONTROL | IM_BYPASS_BUFFER;
2076 if (scb->sys_buf_length > 8)
2077 scb->sys_buf_length = 8;
2078 break;
2079 /* Commands that need read-only-mode (system <- device): */
2080 case REQUEST_SENSE:
2081 scb->command = IM_REQUEST_SENSE_CMD;
2082 scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER;
2083 break;
2084 /* Commands that need write-only-mode (system -> device): */
2085 case MODE_SELECT:
2086 case MODE_SELECT_10:
2087 IBM_DS(host_index).ldn_modeselect_access[ldn]++;
2088 scb->command = IM_OTHER_SCSI_CMD_CMD;
2089 scb->enable |= IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER; /*Select needs WRITE-enabled */
2090 scb->u1.scsi_cmd_length = cmd->cmd_len;
2091 memcpy(scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len);
2092 last_scsi_type(host_index)[ldn] = IM_LONG_SCB;
2093 break;
2094 /* For other commands, read-only is useful. Most other commands are
2095 running without an input-data-block. */
2096 default:
2097 scb->command = IM_OTHER_SCSI_CMD_CMD;
2098 scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER;
2099 scb->u1.scsi_cmd_length = cmd->cmd_len;
2100 memcpy(scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len);
2101 last_scsi_type(host_index)[ldn] = IM_LONG_SCB;
2102 break;
2103 }
2104 /*issue scb command, and return */
2105 if (++disk_rw_in_progress == 1)
2106 PS2_DISK_LED_ON(shpnt->host_no, target);
2107
2108 if (last_scsi_type(host_index)[ldn] == IM_LONG_SCB) {
2109 issue_cmd(host_index, isa_virt_to_bus(scb), IM_LONG_SCB | ldn);
2110 IBM_DS(host_index).long_scbs++;
2111 } else {
2112 issue_cmd(host_index, isa_virt_to_bus(scb), IM_SCB | ldn);
2113 IBM_DS(host_index).scbs++;
2114 }
2115 return 0;
2116 }
2117
2118 static int ibmmca_abort(Scsi_Cmnd * cmd)
2119 {
2120 /* Abort does not work, as the adapter never generates an interrupt on
2121 * whatever situation is simulated, even when really pending commands
2122 * are running on the adapters' hardware ! */
2123
2124 struct Scsi_Host *shpnt;
2125 unsigned int ldn;
2126 void (*saved_done) (Scsi_Cmnd *);
2127 int target;
2128 int host_index;
2129 int max_pun;
2130 unsigned long imm_command;
2131
2132 #ifdef IM_DEBUG_PROBE
2133 printk("IBM MCA SCSI: Abort subroutine called...\n");
2134 #endif
2135
2136 shpnt = cmd->device->host;
2137 /* search for the right hostadapter */
2138 for (host_index = 0; hosts[host_index] && hosts[host_index]->host_no != shpnt->host_no; host_index++);
2139
2140 if (!hosts[host_index]) { /* invalid hostadapter descriptor address */
2141 cmd->result = DID_NO_CONNECT << 16;
2142 if (cmd->scsi_done)
2143 (cmd->scsi_done) (cmd);
2144 shpnt = cmd->device->host;
2145 #ifdef IM_DEBUG_PROBE
2146 printk(KERN_DEBUG "IBM MCA SCSI: Abort adapter selection failed!\n");
2147 #endif
2148 return SUCCESS;
2149 }
2150 max_pun = subsystem_maxid(host_index);
2151 if (ibm_ansi_order) {
2152 target = max_pun - 1 - cmd->device->id;
2153 if ((target <= subsystem_pun(host_index)) && (cmd->device->id <= subsystem_pun(host_index)))
2154 target--;
2155 else if ((target >= subsystem_pun(host_index)) && (cmd->device->id >= subsystem_pun(host_index)))
2156 target++;
2157 } else
2158 target = cmd->device->id;
2159
2160 /* get logical device number, and disable system interrupts */
2161 printk(KERN_WARNING "IBM MCA SCSI: Sending abort to device pun=%d, lun=%d.\n", target, cmd->device->lun);
2162 ldn = get_ldn(host_index)[target][cmd->device->lun];
2163
2164 /*if cmd for this ldn has already finished, no need to abort */
2165 if (!ld(host_index)[ldn].cmd) {
2166 return SUCCESS;
2167 }
2168
2169 /* Clear ld.cmd, save done function, install internal done,
2170 * send abort immediate command (this enables sys. interrupts),
2171 * and wait until the interrupt arrives.
2172 */
2173 saved_done = cmd->scsi_done;
2174 cmd->scsi_done = internal_done;
2175 cmd->SCp.Status = 0;
2176 last_scsi_command(host_index)[ldn] = IM_ABORT_IMM_CMD;
2177 last_scsi_type(host_index)[ldn] = IM_IMM_CMD;
2178 imm_command = inl(IM_CMD_REG(host_index));
2179 imm_command &= (unsigned long) (0xffff0000); /* mask reserved stuff */
2180 imm_command |= (unsigned long) (IM_ABORT_IMM_CMD);
2181 /* must wait for attention reg not busy */
2182 /* FIXME - timeout, politeness */
2183 while (1) {
2184 if (!(inb(IM_STAT_REG(host_index)) & IM_BUSY))
2185 break;
2186 }
2187 /* write registers and enable system interrupts */
2188 outl(imm_command, IM_CMD_REG(host_index));
2189 outb(IM_IMM_CMD | ldn, IM_ATTN_REG(host_index));
2190 #ifdef IM_DEBUG_PROBE
2191 printk("IBM MCA SCSI: Abort queued to adapter...\n");
2192 #endif
2193 spin_unlock_irq(shpnt->host_lock);
2194 while (!cmd->SCp.Status)
2195 yield();
2196 spin_lock_irq(shpnt->host_lock);
2197 cmd->scsi_done = saved_done;
2198 #ifdef IM_DEBUG_PROBE
2199 printk("IBM MCA SCSI: Abort returned with adapter response...\n");
2200 #endif
2201
2202 /*if abort went well, call saved done, then return success or error */
2203 if (cmd->result == (DID_ABORT << 16))
2204 {
2205 cmd->result |= DID_ABORT << 16;
2206 if (cmd->scsi_done)
2207 (cmd->scsi_done) (cmd);
2208 ld(host_index)[ldn].cmd = NULL;
2209 #ifdef IM_DEBUG_PROBE
2210 printk("IBM MCA SCSI: Abort finished with success.\n");
2211 #endif
2212 return SUCCESS;
2213 } else {
2214 cmd->result |= DID_NO_CONNECT << 16;
2215 if (cmd->scsi_done)
2216 (cmd->scsi_done) (cmd);
2217 ld(host_index)[ldn].cmd = NULL;
2218 #ifdef IM_DEBUG_PROBE
2219 printk("IBM MCA SCSI: Abort failed.\n");
2220 #endif
2221 return FAILED;
2222 }
2223 }
2224
2225 static int ibmmca_host_reset(Scsi_Cmnd * cmd)
2226 {
2227 struct Scsi_Host *shpnt;
2228 Scsi_Cmnd *cmd_aid;
2229 int ticks, i;
2230 int host_index;
2231 unsigned long imm_command;
2232
2233 if (cmd == NULL)
2234 BUG();
2235
2236 ticks = IM_RESET_DELAY * HZ;
2237 shpnt = cmd->device->host;
2238 /* search for the right hostadapter */
2239 for (host_index = 0; hosts[host_index] && hosts[host_index]->host_no != shpnt->host_no; host_index++);
2240
2241 if (!hosts[host_index]) /* invalid hostadapter descriptor address */
2242 return FAILED;
2243
2244 if (local_checking_phase_flag(host_index)) {
2245 printk(KERN_WARNING "IBM MCA SCSI: unable to reset while checking devices.\n");
2246 return FAILED;
2247 }
2248
2249 /* issue reset immediate command to subsystem, and wait for interrupt */
2250 printk("IBM MCA SCSI: resetting all devices.\n");
2251 reset_status(host_index) = IM_RESET_IN_PROGRESS;
2252 last_scsi_command(host_index)[0xf] = IM_RESET_IMM_CMD;
2253 last_scsi_type(host_index)[0xf] = IM_IMM_CMD;
2254 imm_command = inl(IM_CMD_REG(host_index));
2255 imm_command &= (unsigned long) (0xffff0000); /* mask reserved stuff */
2256 imm_command |= (unsigned long) (IM_RESET_IMM_CMD);
2257 /* must wait for attention reg not busy */
2258 while (1) {
2259 if (!(inb(IM_STAT_REG(host_index)) & IM_BUSY))
2260 break;
2261 spin_unlock_irq(shpnt->host_lock);
2262 yield();
2263 spin_lock_irq(shpnt->host_lock);
2264 }
2265 /*write registers and enable system interrupts */
2266 outl(imm_command, IM_CMD_REG(host_index));
2267 outb(IM_IMM_CMD | 0xf, IM_ATTN_REG(host_index));
2268 /* wait for interrupt finished or intr_stat register to be set, as the
2269 * interrupt will not be executed, while we are in here! */
2270
2271 /* FIXME: This is really really icky we so want a sleeping version of this ! */
2272 while (reset_status(host_index) == IM_RESET_IN_PROGRESS && --ticks && ((inb(IM_INTR_REG(host_index)) & 0x8f) != 0x8f)) {
2273 udelay((1 + 999 / HZ) * 1000);
2274 barrier();
2275 }
2276 /* if reset did not complete, just return an error */
2277 if (!ticks) {
2278 printk(KERN_ERR "IBM MCA SCSI: reset did not complete within %d seconds.\n", IM_RESET_DELAY);
2279 reset_status(host_index) = IM_RESET_FINISHED_FAIL;
2280 return FAILED;
2281 }
2282
2283 if ((inb(IM_INTR_REG(host_index)) & 0x8f) == 0x8f) {
2284 /* analysis done by this routine and not by the intr-routine */
2285 if (inb(IM_INTR_REG(host_index)) == 0xaf)
2286 reset_status(host_index) = IM_RESET_FINISHED_OK_NO_INT;
2287 else if (inb(IM_INTR_REG(host_index)) == 0xcf)
2288 reset_status(host_index) = IM_RESET_FINISHED_FAIL;
2289 else /* failed, 4get it */
2290 reset_status(host_index) = IM_RESET_NOT_IN_PROGRESS_NO_INT;
2291 outb(IM_EOI | 0xf, IM_ATTN_REG(host_index));
2292 }
2293
2294 /* if reset failed, just return an error */
2295 if (reset_status(host_index) == IM_RESET_FINISHED_FAIL) {
2296 printk(KERN_ERR "IBM MCA SCSI: reset failed.\n");
2297 return FAILED;
2298 }
2299
2300 /* so reset finished ok - call outstanding done's, and return success */
2301 printk(KERN_INFO "IBM MCA SCSI: Reset successfully completed.\n");
2302 for (i = 0; i < MAX_LOG_DEV; i++) {
2303 cmd_aid = ld(host_index)[i].cmd;
2304 if (cmd_aid && cmd_aid->scsi_done) {
2305 ld(host_index)[i].cmd = NULL;
2306 cmd_aid->result = DID_RESET << 16;
2307 }
2308 }
2309 return SUCCESS;
2310 }
2311
2312 static int ibmmca_biosparam(struct scsi_device *sdev, struct block_device *bdev, sector_t capacity, int *info)
2313 {
2314 int size = capacity;
2315 info[0] = 64;
2316 info[1] = 32;
2317 info[2] = size / (info[0] * info[1]);
2318 if (info[2] >= 1024) {
2319 info[0] = 128;
2320 info[1] = 63;
2321 info[2] = size / (info[0] * info[1]);
2322 if (info[2] >= 1024) {
2323 info[0] = 255;
2324 info[1] = 63;
2325 info[2] = size / (info[0] * info[1]);
2326 if (info[2] >= 1024)
2327 info[2] = 1023;
2328 }
2329 }
2330 return 0;
2331 }
2332
2333 /* calculate percentage of total accesses on a ldn */
2334 static int ldn_access_load(int host_index, int ldn)
2335 {
2336 if (IBM_DS(host_index).total_accesses == 0)
2337 return (0);
2338 if (IBM_DS(host_index).ldn_access[ldn] == 0)
2339 return (0);
2340 return (IBM_DS(host_index).ldn_access[ldn] * 100) / IBM_DS(host_index).total_accesses;
2341 }
2342
2343 /* calculate total amount of r/w-accesses */
2344 static int ldn_access_total_read_write(int host_index)
2345 {
2346 int a;
2347 int i;
2348
2349 a = 0;
2350 for (i = 0; i <= MAX_LOG_DEV; i++)
2351 a += IBM_DS(host_index).ldn_read_access[i] + IBM_DS(host_index).ldn_write_access[i];
2352 return (a);
2353 }
2354
2355 static int ldn_access_total_inquiry(int host_index)
2356 {
2357 int a;
2358 int i;
2359
2360 a = 0;
2361 for (i = 0; i <= MAX_LOG_DEV; i++)
2362 a += IBM_DS(host_index).ldn_inquiry_access[i];
2363 return (a);
2364 }
2365
2366 static int ldn_access_total_modeselect(int host_index)
2367 {
2368 int a;
2369 int i;
2370
2371 a = 0;
2372 for (i = 0; i <= MAX_LOG_DEV; i++)
2373 a += IBM_DS(host_index).ldn_modeselect_access[i];
2374 return (a);
2375 }
2376
2377 /* routine to display info in the proc-fs-structure (a deluxe feature) */
2378 static int ibmmca_proc_info(struct Scsi_Host *shpnt, char *buffer, char **start, off_t offset, int length, int inout)
2379 {
2380 int len = 0;
2381 int i, id, lun, host_index;
2382 unsigned long flags;
2383 int max_pun;
2384
2385 for (i = 0; hosts[i] && hosts[i] != shpnt; i++);
2386
2387 spin_lock_irqsave(hosts[i]->host_lock, flags); /* Check it */
2388 host_index = i;
2389 if (!shpnt) {
2390 len += sprintf(buffer + len, "\nIBM MCA SCSI: Can't find adapter for host number %d\n",
2391 shpnt->host_no);
2392 return len;
2393 }
2394 max_pun = subsystem_maxid(host_index);
2395
2396 len += sprintf(buffer + len, "\n IBM-SCSI-Subsystem-Linux-Driver, Version %s\n\n\n", IBMMCA_SCSI_DRIVER_VERSION);
2397 len += sprintf(buffer + len, " SCSI Access-Statistics:\n");
2398 len += sprintf(buffer + len, " Device Scanning Order....: %s\n", (ibm_ansi_order) ? "IBM/ANSI" : "New Industry Standard");
2399 #ifdef CONFIG_SCSI_MULTI_LUN
2400 len += sprintf(buffer + len, " Multiple LUN probing.....: Yes\n");
2401 #else
2402 len += sprintf(buffer + len, " Multiple LUN probing.....: No\n");
2403 #endif
2404 len += sprintf(buffer + len, " This Hostnumber..........: %d\n", shpnt->host_no);
2405 len += sprintf(buffer + len, " Base I/O-Port............: 0x%x\n", (unsigned int) (IM_CMD_REG(host_index)));
2406 len += sprintf(buffer + len, " (Shared) IRQ.............: %d\n", IM_IRQ);
2407 len += sprintf(buffer + len, " Total Interrupts.........: %d\n", IBM_DS(host_index).total_interrupts);
2408 len += sprintf(buffer + len, " Total SCSI Accesses......: %d\n", IBM_DS(host_index).total_accesses);
2409 len += sprintf(buffer + len, " Total short SCBs.........: %d\n", IBM_DS(host_index).scbs);
2410 len += sprintf(buffer + len, " Total long SCBs..........: %d\n", IBM_DS(host_index).long_scbs);
2411 len += sprintf(buffer + len, " Total SCSI READ/WRITE..: %d\n", ldn_access_total_read_write(host_index));
2412 len += sprintf(buffer + len, " Total SCSI Inquiries...: %d\n", ldn_access_total_inquiry(host_index));
2413 len += sprintf(buffer + len, " Total SCSI Modeselects.: %d\n", ldn_access_total_modeselect(host_index));
2414 len += sprintf(buffer + len, " Total SCSI other cmds..: %d\n", IBM_DS(host_index).total_accesses - ldn_access_total_read_write(host_index)
2415 - ldn_access_total_modeselect(host_index)
2416 - ldn_access_total_inquiry(host_index));
2417 len += sprintf(buffer + len, " Total SCSI command fails.: %d\n\n", IBM_DS(host_index).total_errors);
2418 len += sprintf(buffer + len, " Logical-Device-Number (LDN) Access-Statistics:\n");
2419 len += sprintf(buffer + len, " LDN | Accesses [%%] | READ | WRITE | ASSIGNMENTS\n");
2420 len += sprintf(buffer + len, " -----|--------------|-----------|-----------|--------------\n");
2421 for (i = 0; i <= MAX_LOG_DEV; i++)
2422 len += sprintf(buffer + len, " %2X | %3d | %8d | %8d | %8d\n", i, ldn_access_load(host_index, i), IBM_DS(host_index).ldn_read_access[i], IBM_DS(host_index).ldn_write_access[i], IBM_DS(host_index).ldn_assignments[i]);
2423 len += sprintf(buffer + len, " -----------------------------------------------------------\n\n");
2424 len += sprintf(buffer + len, " Dynamical-LDN-Assignment-Statistics:\n");
2425 len += sprintf(buffer + len, " Number of physical SCSI-devices..: %d (+ Adapter)\n", IBM_DS(host_index).total_scsi_devices);
2426 len += sprintf(buffer + len, " Dynamical Assignment necessary...: %s\n", IBM_DS(host_index).dyn_flag ? "Yes" : "No ");
2427 len += sprintf(buffer + len, " Next LDN to be assigned..........: 0x%x\n", next_ldn(host_index));
2428 len += sprintf(buffer + len, " Dynamical assignments done yet...: %d\n", IBM_DS(host_index).dynamical_assignments);
2429 len += sprintf(buffer + len, "\n Current SCSI-Device-Mapping:\n");
2430 len += sprintf(buffer + len, " Physical SCSI-Device Map Logical SCSI-Device Map\n");
2431 len += sprintf(buffer + len, " ID\\LUN 0 1 2 3 4 5 6 7 ID\\LUN 0 1 2 3 4 5 6 7\n");
2432 for (id = 0; id < max_pun; id++) {
2433 len += sprintf(buffer + len, " %2d ", id);
2434 for (lun = 0; lun < 8; lun++)
2435 len += sprintf(buffer + len, "%2s ", ti_p(get_scsi(host_index)[id][lun]));
2436 len += sprintf(buffer + len, " %2d ", id);
2437 for (lun = 0; lun < 8; lun++)
2438 len += sprintf(buffer + len, "%2s ", ti_l(get_ldn(host_index)[id][lun]));
2439 len += sprintf(buffer + len, "\n");
2440 }
2441
2442 len += sprintf(buffer + len, "(A = IBM-Subsystem, D = Harddisk, T = Tapedrive, P = Processor, W = WORM,\n");
2443 len += sprintf(buffer + len, " R = CD-ROM, S = Scanner, M = MO-Drive, C = Medium-Changer, + = unprovided LUN,\n");
2444 len += sprintf(buffer + len, " - = nothing found, nothing assigned or unprobed LUN)\n\n");
2445
2446 *start = buffer + offset;
2447 len -= offset;
2448 if (len > length)
2449 len = length;
2450 spin_unlock_irqrestore(shpnt->host_lock, flags);
2451 return len;
2452 }
2453
2454 static int option_setup(char *str)
2455 {
2456 int ints[IM_MAX_HOSTS];
2457 char *cur = str;
2458 int i = 1;
2459
2460 while (cur && isdigit(*cur) && i <= IM_MAX_HOSTS) {
2461 ints[i++] = simple_strtoul(cur, NULL, 0);
2462 if ((cur = strchr(cur, ',')) != NULL)
2463 cur++;
2464 }
2465 ints[0] = i - 1;
2466 internal_ibmmca_scsi_setup(cur, ints);
2467 return 0;
2468 }
2469
2470 __setup("ibmmcascsi=", option_setup);
2471
2472 static Scsi_Host_Template driver_template = {
2473 .proc_name = "ibmmca",
2474 .proc_info = ibmmca_proc_info,
2475 .name = "IBM SCSI-Subsystem",
2476 .detect = ibmmca_detect,
2477 .release = ibmmca_release,
2478 .queuecommand = ibmmca_queuecommand,
2479 .eh_abort_handler = ibmmca_abort,
2480 .eh_host_reset_handler = ibmmca_host_reset,
2481 .bios_param = ibmmca_biosparam,
2482 .can_queue = 16,
2483 .this_id = 7,
2484 .sg_tablesize = 16,
2485 .cmd_per_lun = 1,
2486 .use_clustering = ENABLE_CLUSTERING,
2487 };
2488 #include "scsi_module.c"
MOXA 2.6.9 from sdlinux-moxaart.tgz