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Ok. I didn't make 2.4.0 in 2000. Tough. I tried, but we had some
[davej-history.git] / drivers / scsi / ibmmca.c
blobb97b9055401c9d4c6fdb324371fc8eeff72e0023
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 README.ibmmca for a detailed description of this driver,
8 the commandline arguments and the history of its development.
9 See the WWW-page: http://www.uni-mainz.de/~langm000/linux.html for latest
10 updates, info and ADF-files for adapters supported by this driver.
11 */
12
13 #ifndef LINUX_VERSION_CODE
14 #include <linux/version.h>
15 #endif
16 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,4,0)
17 #error "This driver works only with kernel 2.4.0 or higher!"
18 #endif
19 #include <linux/kernel.h>
20 #include <linux/types.h>
21 #include <linux/ctype.h>
22 #include <linux/string.h>
23 #include <linux/ioport.h>
24 #include <linux/delay.h>
25 #include <linux/sched.h>
26 #include <linux/blk.h>
27 #include <linux/proc_fs.h>
28 #include <linux/stat.h>
29 #include <linux/mca.h>
30 #include <asm/system.h>
31 #include <linux/spinlock.h>
32 #include <asm/io.h>
33 #include <linux/init.h>
34 #include "sd.h"
35 #include "scsi.h"
36 #include "hosts.h"
37 #include "ibmmca.h"
38 #include <linux/config.h>
39
40 /* current version of this driver-source: */
41 #define IBMMCA_SCSI_DRIVER_VERSION "4.0"
42
43 #define IBMLOCK spin_lock_irqsave(&io_request_lock, flags);
44 #define IBMUNLOCK spin_unlock_irqrestore(&io_request_lock, flags);
45
46 /* driver configuration */
47 #define IM_MAX_HOSTS 8 /* maximum number of host adapters */
48 #define IM_RESET_DELAY 60 /* seconds allowed for a reset */
49
50 /* driver debugging - #undef all for normal operation */
51 /* if defined: count interrupts and ignore this special one: */
52 #undef IM_DEBUG_TIMEOUT 50
53 #define TIMEOUT_PUN 0
54 #define TIMEOUT_LUN 0
55 /* verbose interrupt: */
56 #undef IM_DEBUG_INT
57 /* verbose queuecommand: */
58 #undef IM_DEBUG_CMD
59 /* verbose queucommand for specific SCSI-device type: */
60 #undef IM_DEBUG_CMD_SPEC_DEV
61 /* verbose device probing */
62 #undef IM_DEBUG_PROBE
63
64 /* device type that shall be displayed on syslog (only during debugging): */
65 #define IM_DEBUG_CMD_DEVICE TYPE_TAPE
66
67 /* relative addresses of hardware registers on a subsystem */
68 #define IM_CMD_REG(hi) (hosts[(hi)]->io_port) /*Command Interface, (4 bytes long) */
69 #define IM_ATTN_REG(hi) (hosts[(hi)]->io_port+4) /*Attention (1 byte) */
70 #define IM_CTR_REG(hi) (hosts[(hi)]->io_port+5) /*Basic Control (1 byte) */
71 #define IM_INTR_REG(hi) (hosts[(hi)]->io_port+6) /*Interrupt Status (1 byte, r/o) */
72 #define IM_STAT_REG(hi) (hosts[(hi)]->io_port+7) /*Basic Status (1 byte, read only) */
73
74 /* basic I/O-port of first adapter */
75 #define IM_IO_PORT 0x3540
76 /* maximum number of hosts that can be found */
77 #define IM_N_IO_PORT 8
78
79 /*requests going into the upper nibble of the Attention register */
80 /*note: the lower nibble specifies the device(0-14), or subsystem(15) */
81 #define IM_IMM_CMD 0x10 /*immediate command */
82 #define IM_SCB 0x30 /*Subsystem Control Block command */
83 #define IM_LONG_SCB 0x40 /*long Subsystem Control Block command */
84 #define IM_EOI 0xe0 /*end-of-interrupt request */
85
86 /*values for bits 7,1,0 of Basic Control reg. (bits 6-2 reserved) */
87 #define IM_HW_RESET 0x80 /*hardware reset */
88 #define IM_ENABLE_DMA 0x02 /*enable subsystem's busmaster DMA */
89 #define IM_ENABLE_INTR 0x01 /*enable interrupts to the system */
90
91 /*to interpret the upper nibble of Interrupt Status register */
92 /*note: the lower nibble specifies the device(0-14), or subsystem(15) */
93 #define IM_SCB_CMD_COMPLETED 0x10
94 #define IM_SCB_CMD_COMPLETED_WITH_RETRIES 0x50
95 #define IM_LOOP_SCATTER_BUFFER_FULL 0x60
96 #define IM_ADAPTER_HW_FAILURE 0x70
97 #define IM_IMMEDIATE_CMD_COMPLETED 0xa0
98 #define IM_CMD_COMPLETED_WITH_FAILURE 0xc0
99 #define IM_CMD_ERROR 0xe0
100 #define IM_SOFTWARE_SEQUENCING_ERROR 0xf0
101
102 /*to interpret bits 3-0 of Basic Status register (bits 7-4 reserved) */
103 #define IM_CMD_REG_FULL 0x08
104 #define IM_CMD_REG_EMPTY 0x04
105 #define IM_INTR_REQUEST 0x02
106 #define IM_BUSY 0x01
107
108 /*immediate commands (word written into low 2 bytes of command reg) */
109 #define IM_RESET_IMM_CMD 0x0400
110 #define IM_FEATURE_CTR_IMM_CMD 0x040c
111 #define IM_DMA_PACING_IMM_CMD 0x040d
112 #define IM_ASSIGN_IMM_CMD 0x040e
113 #define IM_ABORT_IMM_CMD 0x040f
114 #define IM_FORMAT_PREP_IMM_CMD 0x0417
115
116 /*SCB (Subsystem Control Block) structure */
117 struct im_scb {
118 unsigned short command; /*command word (read, etc.) */
119 unsigned short enable; /*enable word, modifies cmd */
120 union {
121 unsigned long log_blk_adr; /*block address on SCSI device */
122 unsigned char scsi_cmd_length; /*6,10,12, for other scsi cmd */
123 } u1;
124 unsigned long sys_buf_adr; /*physical system memory adr */
125 unsigned long sys_buf_length; /*size of sys mem buffer */
126 unsigned long tsb_adr; /*Termination Status Block adr */
127 unsigned long scb_chain_adr; /*optional SCB chain address */
128 union {
129 struct {
130 unsigned short count; /*block count, on SCSI device */
131 unsigned short length; /*block length, on SCSI device */
132 } blk;
133 unsigned char scsi_command[12]; /*other scsi command */
134 } u2;
135 };
136
137 /*structure scatter-gather element (for list of system memory areas) */
138 struct im_sge {
139 void *address;
140 unsigned long byte_length;
141 };
142
143 /*structure returned by a get_pos_info command: */
144 struct im_pos_info {
145 unsigned short pos_id; /* adapter id */
146 unsigned char pos_3a; /* pos 3 (if pos 6 = 0) */
147 unsigned char pos_2; /* pos 2 */
148 unsigned char int_level; /* interrupt level IRQ 11 or 14 */
149 unsigned char pos_4a; /* pos 4 (if pos 6 = 0) */
150 unsigned short connector_size; /* MCA connector size: 16 or 32 Bit */
151 unsigned char num_luns; /* number of supported luns per device */
152 unsigned char num_puns; /* number of supported puns */
153 unsigned char pacing_factor; /* pacing factor */
154 unsigned char num_ldns; /* number of ldns available */
155 unsigned char eoi_off; /* time EOI and interrupt inactive */
156 unsigned char max_busy; /* time between reset and busy on */
157 unsigned short cache_stat; /* ldn cachestat. Bit=1 = not cached */
158 unsigned short retry_stat; /* retry status of ldns. Bit=1=disabled */
159 unsigned char pos_4b; /* pos 4 (if pos 6 = 1) */
160 unsigned char pos_3b; /* pos 3 (if pos 6 = 1) */
161 unsigned char pos_6; /* pos 6 */
162 unsigned char pos_5; /* pos 5 */
163 unsigned short max_overlap; /* maximum overlapping requests */
164 unsigned short num_bus; /* number of SCSI-busses */
165 };
166
167 /*values for SCB command word */
168 #define IM_NO_SYNCHRONOUS 0x0040 /*flag for any command */
169 #define IM_NO_DISCONNECT 0x0080 /*flag for any command */
170 #define IM_READ_DATA_CMD 0x1c01
171 #define IM_WRITE_DATA_CMD 0x1c02
172 #define IM_READ_VERIFY_CMD 0x1c03
173 #define IM_WRITE_VERIFY_CMD 0x1c04
174 #define IM_REQUEST_SENSE_CMD 0x1c08
175 #define IM_READ_CAPACITY_CMD 0x1c09
176 #define IM_DEVICE_INQUIRY_CMD 0x1c0b
177 #define IM_READ_LOGICAL_CMD 0x1c2a
178 #define IM_OTHER_SCSI_CMD_CMD 0x241f
179
180 /* unused, but supported, SCB commands */
181 #define IM_GET_COMMAND_COMPLETE_STATUS_CMD 0x1c07 /* command status */
182 #define IM_GET_POS_INFO_CMD 0x1c0a /* returns neat stuff */
183 #define IM_READ_PREFETCH_CMD 0x1c31 /* caching controller only */
184 #define IM_FOMAT_UNIT_CMD 0x1c16 /* format unit */
185 #define IM_REASSIGN_BLOCK_CMD 0x1c18 /* in case of error */
186
187 /*values to set bits in the enable word of SCB */
188 #define IM_READ_CONTROL 0x8000
189 #define IM_REPORT_TSB_ONLY_ON_ERROR 0x4000
190 #define IM_RETRY_ENABLE 0x2000
191 #define IM_POINTER_TO_LIST 0x1000
192 #define IM_SUPRESS_EXCEPTION_SHORT 0x0400
193 #define IM_BYPASS_BUFFER 0x0200
194 #define IM_CHAIN_ON_NO_ERROR 0x0001
195
196 /*TSB (Termination Status Block) structure */
197 struct im_tsb {
198 unsigned short end_status;
199 unsigned short reserved1;
200 unsigned long residual_byte_count;
201 unsigned long sg_list_element_adr;
202 unsigned short status_length;
203 unsigned char dev_status;
204 unsigned char cmd_status;
205 unsigned char dev_error;
206 unsigned char cmd_error;
207 unsigned short reserved2;
208 unsigned short reserved3;
209 unsigned short low_of_last_scb_adr;
210 unsigned short high_of_last_scb_adr;
211 };
212
213 /*subsystem uses interrupt request level 14 */
214 #define IM_IRQ 14
215 /*SCSI-2 F/W may evade to interrupt 11 */
216 #define IM_IRQ_FW 11
217
218 /* Model 95 has an additional alphanumeric display, which can be used
219 to display SCSI-activities. 8595 models do not have any disk led, which
220 makes this feature quite useful.
221 The regular PS/2 disk led is turned on/off by bits 6,7 of system
222 control port. */
223
224 /* LED display-port (actually, last LED on display) */
225 #define MOD95_LED_PORT 0x108
226 /* system-control-register of PS/2s with diskindicator */
227 #define PS2_SYS_CTR 0x92
228 /* activity displaying methods */
229 #define LED_DISP 1
230 #define LED_ADISP 2
231 #define LED_ACTIVITY 4
232 /* failed intr */
233 #define CMD_FAIL 255
234
235 /* The SCSI-ID(!) of the accessed SCSI-device is shown on PS/2-95 machines' LED
236 displays. ldn is no longer displayed here, because the ldn mapping is now
237 done dynamically and the ldn <-> pun,lun maps can be looked-up at boottime
238 or during uptime in /proc/scsi/ibmmca/<host_no> in case of trouble,
239 interest, debugging or just for having fun. The left number gives the
240 host-adapter number and the right shows the accessed SCSI-ID. */
241
242 /* display_mode is set by the ibmmcascsi= command line arg */
243 static int display_mode = 0;
244 /* set default adapter timeout */
245 static unsigned int adapter_timeout = 45;
246 /* for probing on feature-command: */
247 static unsigned int global_command_error_excuse = 0;
248 /* global setting by command line for adapter_speed */
249 static int global_adapter_speed = 0; /* full speed by default */
250
251 /* Panel / LED on, do it right for F/W addressin, too. adisplay will
252 * just ignore ids>7, as the panel has only 7 digits available */
253 #define PS2_DISK_LED_ON(ad,id) { if (display_mode & LED_DISP) { if (id>9) \
254 outw((ad+48)|((id+55)<<8), MOD95_LED_PORT ); else \
255 outw((ad+48)|((id+48)<<8), MOD95_LED_PORT ); } else \
256 if (display_mode & LED_ADISP) { if (id<7) outb((char)(id+48),MOD95_LED_PORT+1+id); \
257 outb((char)(ad+48), MOD95_LED_PORT); } \
258 if ((display_mode & LED_ACTIVITY)||(!display_mode)) \
259 outb(inb(PS2_SYS_CTR) | 0xc0, PS2_SYS_CTR); }
260
261 /* Panel / LED off */
262 /* bug fixed, Dec 15, 1997, where | was replaced by & here */
263 #define PS2_DISK_LED_OFF() { if (display_mode & LED_DISP) \
264 outw(0x2020, MOD95_LED_PORT ); else if (display_mode & LED_ADISP) { \
265 outl(0x20202020,MOD95_LED_PORT); outl(0x20202020,MOD95_LED_PORT+4); } \
266 if ((display_mode & LED_ACTIVITY)||(!display_mode)) \
267 outb(inb(PS2_SYS_CTR) & 0x3f, PS2_SYS_CTR); }
268
269 /*list of supported subsystems */
270 struct subsys_list_struct {
271 unsigned short mca_id;
272 char *description;
273 };
274
275 /* types of different supported hardware that goes to hostdata special */
276 #define IBM_SCSI2_FW 0
277 #define IBM_7568_WCACHE 1
278 #define IBM_EXP_UNIT 2
279 #define IBM_SCSI_WCACHE 3
280 #define IBM_SCSI 4
281
282 /* other special flags for hostdata structure */
283 #define FORCED_DETECTION 100
284 #define INTEGRATED_SCSI 101
285
286 /* List of possible IBM-SCSI-adapters */
287 struct subsys_list_struct subsys_list[] = {
288 {0x8efc,"IBM SCSI-2 F/W Adapter"}, /* special = 0 */
289 {0x8efd,"IBM 7568 Industrial Computer SCSI Adapter w/Cache"}, /* special = 1 */
290 {0x8ef8,"IBM Expansion Unit SCSI Controller"},/* special = 2 */
291 {0x8eff,"IBM SCSI Adapter w/Cache"}, /* special = 3 */
292 {0x8efe,"IBM SCSI Adapter"}, /* special = 4 */
293 };
294
295 /* Max number of logical devices (can be up from 0 to 14). 15 is the address
296 of the adapter itself. */
297 #define MAX_LOG_DEV 15
298
299 /*local data for a logical device */
300 struct logical_device {
301 struct im_scb scb; /* SCSI-subsystem-control-block structure */
302 struct im_tsb tsb; /* SCSI command complete status block structure */
303 struct im_sge sge[16]; /* scatter gather list structure */
304 unsigned char buf[256]; /* SCSI command return data buffer */
305 Scsi_Cmnd *cmd; /* SCSI-command that is currently in progress */
306 int device_type; /* type of the SCSI-device. See include/scsi/scsi.h
307 for interpretation of the possible values */
308 int block_length; /* blocksize of a particular logical SCSI-device */
309 int cache_flag; /* 1 if this is uncached, 0 if cache is present for ldn */
310 int retry_flag; /* 1 if adapter retry is disabled, 0 if enabled */
311 };
312
313 /* statistics of the driver during operations (for proc_info) */
314 struct Driver_Statistics {
315 /* SCSI statistics on the adapter */
316 int ldn_access[MAX_LOG_DEV+1]; /* total accesses on a ldn */
317 int ldn_read_access[MAX_LOG_DEV+1]; /* total read-access on a ldn */
318 int ldn_write_access[MAX_LOG_DEV+1]; /* total write-access on a ldn */
319 int ldn_inquiry_access[MAX_LOG_DEV+1]; /* total inquiries on a ldn */
320 int ldn_modeselect_access[MAX_LOG_DEV+1]; /* total mode selects on ldn */
321 int scbs; /* short SCBs queued */
322 int long_scbs; /* long SCBs queued */
323 int total_accesses; /* total accesses on all ldns */
324 int total_interrupts; /* total interrupts (should be
325 same as total_accesses) */
326 int total_errors; /* command completed with error */
327 /* dynamical assignment statistics */
328 int total_scsi_devices; /* number of physical pun,lun */
329 int dyn_flag; /* flag showing dynamical mode */
330 int dynamical_assignments; /* number of remappings of ldns */
331 int ldn_assignments[MAX_LOG_DEV+1]; /* number of remappings of each
332 ldn */
333 };
334
335 /* data structure for each host adapter */
336 struct ibmmca_hostdata {
337 /* array of logical devices: */
338 struct logical_device _ld[MAX_LOG_DEV+1];
339 /* array to convert (pun, lun) into logical device number: */
340 unsigned char _get_ldn[16][8];
341 /*array that contains the information about the physical SCSI-devices
342 attached to this host adapter: */
343 unsigned char _get_scsi[16][8];
344 /* used only when checking logical devices: */
345 int _local_checking_phase_flag;
346 /* report received interrupt: */
347 int _got_interrupt;
348 /* report termination-status of SCSI-command: */
349 int _stat_result;
350 /* reset status (used only when doing reset): */
351 int _reset_status;
352 /* code of the last SCSI command (needed for panic info): */
353 int _last_scsi_command[MAX_LOG_DEV+1];
354 /* identifier of the last SCSI-command type */
355 int _last_scsi_type[MAX_LOG_DEV+1];
356 /* last blockcount */
357 int _last_scsi_blockcount[MAX_LOG_DEV+1];
358 /* last locgical block address */
359 unsigned long _last_scsi_logical_block[MAX_LOG_DEV+1];
360 /* Counter that points on the next reassignable ldn for dynamical
361 remapping. The default value is 7, that is the first reassignable
362 number in the list at boottime: */
363 int _next_ldn;
364 /* Statistics-structure for this IBM-SCSI-host: */
365 struct Driver_Statistics _IBM_DS;
366 /* This hostadapters pos-registers pos2 until pos6 */
367 unsigned int _pos[8];
368 /* assign a special variable, that contains dedicated info about the
369 adaptertype */
370 int _special;
371 /* connector size on the MCA bus */
372 int _connector_size;
373 /* synchronous SCSI transfer rate bitpattern */
374 int _adapter_speed;
375 };
376
377 /* macros to access host data structure */
378 #define subsystem_pun(hi) (hosts[(hi)]->this_id)
379 #define subsystem_maxid(hi) (hosts[(hi)]->max_id)
380 #define ld(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_ld)
381 #define get_ldn(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_get_ldn)
382 #define get_scsi(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_get_scsi)
383 #define local_checking_phase_flag(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_local_checking_phase_flag)
384 #define got_interrupt(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_got_interrupt)
385 #define stat_result(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_stat_result)
386 #define reset_status(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_reset_status)
387 #define last_scsi_command(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_command)
388 #define last_scsi_type(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_type)
389 #define last_scsi_blockcount(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_blockcount)
390 #define last_scsi_logical_block(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_logical_block)
391 #define last_scsi_type(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_type)
392 #define next_ldn(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_next_ldn)
393 #define IBM_DS(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_IBM_DS)
394 #define special(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_special)
395 #define subsystem_connector_size(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_connector_size)
396 #define adapter_speed(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_adapter_speed)
397 #define pos2(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_pos[2])
398 #define pos3(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_pos[3])
399 #define pos4(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_pos[4])
400 #define pos5(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_pos[5])
401 #define pos6(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_pos[6])
402
403 /* Define a arbitrary number as subsystem-marker-type. This number is, as
404 described in the ANSI-SCSI-standard, not occupied by other device-types. */
405 #define TYPE_IBM_SCSI_ADAPTER 0x2F
406
407 /* Define 0xFF for no device type, because this type is not defined within
408 the ANSI-SCSI-standard, therefore, it can be used and should not cause any
409 harm. */
410 #define TYPE_NO_DEVICE 0xFF
411
412 /* define medium-changer. If this is not defined previously, e.g. Linux
413 2.0.x, define this type here. */
414 #ifndef TYPE_MEDIUM_CHANGER
415 #define TYPE_MEDIUM_CHANGER 0x08
416 #endif
417
418 /* define possible operations for the immediate_assign command */
419 #define SET_LDN 0
420 #define REMOVE_LDN 1
421
422 /* ldn which is used to probe the SCSI devices */
423 #define PROBE_LDN 0
424
425 /* reset status flag contents */
426 #define IM_RESET_NOT_IN_PROGRESS 0
427 #define IM_RESET_IN_PROGRESS 1
428 #define IM_RESET_FINISHED_OK 2
429 #define IM_RESET_FINISHED_FAIL 3
430 #define IM_RESET_NOT_IN_PROGRESS_NO_INT 4
431 #define IM_RESET_FINISHED_OK_NO_INT 5
432
433 /* define undefined SCSI-command */
434 #define NO_SCSI 0xffff
435
436 /*-----------------------------------------------------------------------*/
437
438 /* if this is nonzero, ibmmcascsi option has been passed to the kernel */
439 static int io_port[IM_MAX_HOSTS] = { 0, 0, 0, 0, 0, 0, 0, 0 };
440 static int scsi_id[IM_MAX_HOSTS] = { 7, 7, 7, 7, 7, 7, 7, 7 };
441
442 /* fill module-parameters only, when this define is present.
443 (that is kernel version 2.1.x) */
444 #if defined(MODULE)
445 static char *boot_options = NULL;
446 #include <linux/module.h>
447 MODULE_PARM(boot_options, "s");
448 MODULE_PARM(io_port, "1-" __MODULE_STRING(IM_MAX_HOSTS) "i");
449 MODULE_PARM(scsi_id, "1-" __MODULE_STRING(IM_MAX_HOSTS) "i");
450 MODULE_PARM(display, "1i");
451 MODULE_PARM(adisplay, "1i");
452 MODULE_PARM(normal, "1i");
453 MODULE_PARM(ansi, "1i");
454 #endif
455 /*counter of concurrent disk read/writes, to turn on/off disk led */
456 static int disk_rw_in_progress = 0;
457
458 /* host information */
459 static int found = 0;
460 static struct Scsi_Host *hosts[IM_MAX_HOSTS+1] = {
461 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL };
462 static unsigned int pos[8]; /* whole pos register-line for diagnosis */
463 /* Taking into account the additions, made by ZP Gu.
464 * This selects now the preset value from the configfile and
465 * offers the 'normal' commandline option to be accepted */
466 #ifdef CONFIG_IBMMCA_SCSI_ORDER_STANDARD
467 static char ibm_ansi_order = 1;
468 #else
469 static char ibm_ansi_order = 0;
470 #endif
471
472 static void interrupt_handler (int, void *, struct pt_regs *);
473 static void issue_cmd (int, unsigned long, unsigned char);
474 static void internal_done (Scsi_Cmnd * cmd);
475 static void check_devices (int, int);
476 static int immediate_assign(int, unsigned int, unsigned int, unsigned int,
477 unsigned int);
478 static int immediate_feature(int, unsigned int, unsigned int);
479 #ifdef CONFIG_IBMMCA_SCSI_DEV_RESET
480 static int immediate_reset(int, unsigned int);
481 #endif
482 static int device_inquiry(int, int);
483 static int read_capacity(int, int);
484 static int get_pos_info(int);
485 static char *ti_p(int);
486 static char *ti_l(int);
487 static char *ibmrate(unsigned int, int);
488 static int probe_display(int);
489 static int probe_bus_mode(int);
490 static int device_exists (int, int, int *, int *);
491 static struct Scsi_Host *ibmmca_register(Scsi_Host_Template *,
492 int, int, int, char *);
493 /* local functions needed for proc_info */
494 static int ldn_access_load(int, int);
495 static int ldn_access_total_read_write(int);
496
497 static void interrupt_handler (int irq, void *dev_id, struct pt_regs *regs)
498 {
499 int host_index, ihost_index;
500 unsigned int intr_reg;
501 unsigned int cmd_result;
502 unsigned int ldn;
503 unsigned long flags;
504 Scsi_Cmnd *cmd;
505 int lastSCSI;
506
507 IBMLOCK
508 /* search for one adapter-response on shared interrupt */
509 for (host_index=0;
510 hosts[host_index] && !(inb(IM_STAT_REG(host_index)) & IM_INTR_REQUEST);
511 host_index++);
512 /* return if some other device on this IRQ caused the interrupt */
513 if (!hosts[host_index]) {
514 IBMUNLOCK
515 return;
516 }
517
518 /* the reset-function already did all the job, even ints got
519 renabled on the subsystem, so just return */
520 if ((reset_status(host_index) == IM_RESET_NOT_IN_PROGRESS_NO_INT)||
521 (reset_status(host_index) == IM_RESET_FINISHED_OK_NO_INT)) {
522 reset_status(host_index) = IM_RESET_NOT_IN_PROGRESS;
523 IBMUNLOCK
524 return;
525 }
526
527 /*must wait for attention reg not busy, then send EOI to subsystem */
528 while (1) {
529 if (!(inb (IM_STAT_REG(host_index)) & IM_BUSY)) break;
530 IBMUNLOCK /* cycle interrupt */
531 IBMLOCK
532 }
533 ihost_index=host_index;
534 /*get command result and logical device */
535 intr_reg = (unsigned char)(inb (IM_INTR_REG(ihost_index)));
536 cmd_result = intr_reg & 0xf0;
537 ldn = intr_reg & 0x0f;
538 /* get the last_scsi_command here */
539 lastSCSI = last_scsi_command(ihost_index)[ldn];
540 outb (IM_EOI | ldn, IM_ATTN_REG(ihost_index));
541 IBMUNLOCK
542 /*these should never happen (hw fails, or a local programming bug) */
543 if (!global_command_error_excuse) {
544 switch (cmd_result) {
545 /* Prevent from Ooopsing on error to show the real reason */
546 case IM_ADAPTER_HW_FAILURE:
547 case IM_SOFTWARE_SEQUENCING_ERROR:
548 case IM_CMD_ERROR:
549 printk("\nIBM MCA SCSI: Fatal Subsystem ERROR!\n");
550 printk(" Last cmd=0x%x, ena=%x, len=",lastSCSI,
551 ld(ihost_index)[ldn].scb.enable);
552 if (ld(ihost_index)[ldn].cmd)
553 printk("%ld/%ld,",(long)(ld(ihost_index)[ldn].cmd->request_bufflen),
554 (long)(ld(ihost_index)[ldn].scb.sys_buf_length));
555 else
556 printk("none,");
557 if (ld(ihost_index)[ldn].cmd)
558 printk("Blocksize=%d",ld(ihost_index)[ldn].scb.u2.blk.length);
559 else
560 printk("Blocksize=none");
561 printk(", host=0x%x, ldn=0x%x\n",ihost_index, ldn);
562 if (ld(ihost_index)[ldn].cmd) {
563 printk("Blockcount=%d/%d\n",last_scsi_blockcount(ihost_index)[ldn],
564 ld(ihost_index)[ldn].scb.u2.blk.count);
565 printk("Logical block=%lx/%lx\n",last_scsi_logical_block(ihost_index)[ldn],
566 ld(ihost_index)[ldn].scb.u1.log_blk_adr);
567 }
568 printk("Reason given: %s\n",
569 (cmd_result==IM_ADAPTER_HW_FAILURE) ? "HARDWARE FAILURE" :
570 (cmd_result==IM_SOFTWARE_SEQUENCING_ERROR) ? "SOFTWARE SEQUENCING ERROR" :
571 (cmd_result==IM_CMD_ERROR) ? "COMMAND ERROR" : "UNKNOWN");
572 /* if errors appear, enter this section to give detailed info */
573 printk("IBM MCA SCSI: Subsystem Error-Status follows:\n");
574 printk(" Command Type................: %x\n",
575 last_scsi_type(ihost_index)[ldn]);
576 printk(" Attention Register..........: %x\n",
577 inb (IM_ATTN_REG(ihost_index)));
578 printk(" Basic Control Register......: %x\n",
579 inb (IM_CTR_REG(ihost_index)));
580 printk(" Interrupt Status Register...: %x\n",
581 intr_reg);
582 printk(" Basic Status Register.......: %x\n",
583 inb (IM_STAT_REG(ihost_index)));
584 if ((last_scsi_type(ihost_index)[ldn]==IM_SCB)||
585 (last_scsi_type(ihost_index)[ldn]==IM_LONG_SCB)) {
586 printk(" SCB-Command.................: %x\n",
587 ld(ihost_index)[ldn].scb.command);
588 printk(" SCB-Enable..................: %x\n",
589 ld(ihost_index)[ldn].scb.enable);
590 printk(" SCB-logical block address...: %lx\n",
591 ld(ihost_index)[ldn].scb.u1.log_blk_adr);
592 printk(" SCB-system buffer address...: %lx\n",
593 ld(ihost_index)[ldn].scb.sys_buf_adr);
594 printk(" SCB-system buffer length....: %lx\n",
595 ld(ihost_index)[ldn].scb.sys_buf_length);
596 printk(" SCB-tsb address.............: %lx\n",
597 ld(ihost_index)[ldn].scb.tsb_adr);
598 printk(" SCB-Chain address...........: %lx\n",
599 ld(ihost_index)[ldn].scb.scb_chain_adr);
600 printk(" SCB-block count.............: %x\n",
601 ld(ihost_index)[ldn].scb.u2.blk.count);
602 printk(" SCB-block length............: %x\n",
603 ld(ihost_index)[ldn].scb.u2.blk.length);
604 }
605 printk(" Send this report to the maintainer.\n");
606 panic("IBM MCA SCSI: Fatal errormessage from the subsystem (0x%X,0x%X)!\n",
607 lastSCSI,cmd_result);
608 break;
609 }
610 } else {
611 /* The command error handling is made silent, but we tell the
612 * calling function, that there is a reported error from the
613 * adapter. */
614 switch (cmd_result) {
615 case IM_ADAPTER_HW_FAILURE: case IM_SOFTWARE_SEQUENCING_ERROR:
616 case IM_CMD_ERROR: global_command_error_excuse = CMD_FAIL; break;
617 default: global_command_error_excuse = 0; break;
618 }
619 }
620 /* if no panic appeared, increase the interrupt-counter */
621 IBM_DS(ihost_index).total_interrupts++;
622 /*only for local checking phase */
623 if (local_checking_phase_flag(ihost_index)) {
624 stat_result(ihost_index) = cmd_result;
625 got_interrupt(ihost_index) = 1;
626 reset_status(ihost_index) = IM_RESET_FINISHED_OK;
627 last_scsi_command(ihost_index)[ldn] = NO_SCSI;
628 return;
629 }
630 /* handling of commands coming from upper level of scsi driver */
631 if (last_scsi_type(ihost_index)[ldn] == IM_IMM_CMD) {
632 /* verify ldn, and may handle rare reset immediate command */
633 if ((reset_status(ihost_index) == IM_RESET_IN_PROGRESS)&&
634 (last_scsi_command(ihost_index)[ldn] == IM_RESET_IMM_CMD)) {
635 if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE) {
636 disk_rw_in_progress = 0;
637 PS2_DISK_LED_OFF ();
638 reset_status(ihost_index) = IM_RESET_FINISHED_FAIL;
639 } else {
640 /*reset disk led counter, turn off disk led */
641 disk_rw_in_progress = 0;
642 PS2_DISK_LED_OFF ();
643 reset_status(ihost_index) = IM_RESET_FINISHED_OK;
644 }
645 stat_result(ihost_index) = cmd_result;
646 last_scsi_command(ihost_index)[ldn] = NO_SCSI;
647 last_scsi_type(ihost_index)[ldn] = 0;
648 return;
649 } else if (last_scsi_command(ihost_index)[ldn] == IM_ABORT_IMM_CMD) {
650 /* react on SCSI abort command */
651 #ifdef IM_DEBUG_PROBE
652 printk("IBM MCA SCSI: Interrupt from SCSI-abort.\n");
653 #endif
654 disk_rw_in_progress = 0;
655 PS2_DISK_LED_OFF();
656 cmd = ld(ihost_index)[ldn].cmd;
657 ld(ihost_index)[ldn].cmd = NULL;
658 if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE)
659 cmd->result = DID_NO_CONNECT << 16;
660 else
661 cmd->result = DID_ABORT << 16;
662 stat_result(ihost_index) = cmd_result;
663 last_scsi_command(ihost_index)[ldn] = NO_SCSI;
664 last_scsi_type(ihost_index)[ldn] = 0;
665 if (cmd->scsi_done)
666 (cmd->scsi_done)(cmd); /* should be the internal_done */
667 return;
668 } else {
669 disk_rw_in_progress = 0;
670 PS2_DISK_LED_OFF ();
671 reset_status(ihost_index) = IM_RESET_FINISHED_OK;
672 stat_result(ihost_index) = cmd_result;
673 last_scsi_command(ihost_index)[ldn] = NO_SCSI;
674 return;
675 }
676 }
677 last_scsi_command(ihost_index)[ldn] = NO_SCSI;
678 last_scsi_type(ihost_index)[ldn] = 0;
679 cmd = ld(ihost_index)[ldn].cmd;
680 ld(ihost_index)[ldn].cmd = NULL;
681 #ifdef IM_DEBUG_TIMEOUT
682 if (cmd) {
683 if ((cmd->target == TIMEOUT_PUN)&&(cmd->lun == TIMEOUT_LUN)) {
684 printk("IBM MCA SCSI: Ignoring interrupt from pun=%x, lun=%x.\n",
685 cmd->target, cmd->lun);
686 return;
687 }
688 }
689 #endif
690 /*if no command structure, just return, else clear cmd */
691 if (!cmd) return;
692
693 #ifdef IM_DEBUG_INT
694 printk("cmd=%02x ireg=%02x ds=%02x cs=%02x de=%02x ce=%02x\n",
695 cmd->cmnd[0], intr_reg,
696 ld(ihost_index)[ldn].tsb.dev_status,
697 ld(ihost_index)[ldn].tsb.cmd_status,
698 ld(ihost_index)[ldn].tsb.dev_error,
699 ld(ihost_index)[ldn].tsb.cmd_error);
700 #endif
701 /*if this is end of media read/write, may turn off PS/2 disk led */
702 if ((ld(ihost_index)[ldn].device_type!=TYPE_NO_LUN)&&
703 (ld(ihost_index)[ldn].device_type!=TYPE_NO_DEVICE)) {
704 /* only access this, if there was a valid device addressed */
705 if (--disk_rw_in_progress == 0) PS2_DISK_LED_OFF ();
706 }
707
708 /* IBM describes the status-mask to be 0x1e, but this is not conform
709 * with SCSI-definition, I suppose, the reason for it is that IBM
710 * adapters do not support CMD_TERMINATED, TASK_SET_FULL and
711 * ACA_ACTIVE as returning statusbyte information. (ML) */
712 if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE) {
713 cmd->result = (unsigned char)(ld(ihost_index)[ldn].tsb.dev_status & 0x1e);
714 IBM_DS(ihost_index).total_errors++;
715 } else
716 cmd->result = 0;
717 /* write device status into cmd->result, and call done function */
718 if (lastSCSI == NO_SCSI) { /* unexpected interrupt :-( */
719 cmd->result |= DID_BAD_INTR << 16;
720 printk("IBM MCA SCSI: WARNING - Interrupt from non-pending SCSI-command!\n");
721 } else /* things went right :-) */
722 cmd->result |= DID_OK << 16;
723 if (cmd->scsi_done) (cmd->scsi_done)(cmd);
724 return;
725 }
726
727 static void issue_cmd (int host_index, unsigned long cmd_reg,
728 unsigned char attn_reg)
729 {
730 unsigned long flags;
731 /* must wait for attention reg not busy */
732 while (1) {
733 IBMLOCK
734 if (!(inb(IM_STAT_REG(host_index)) & IM_BUSY)) break;
735 IBMUNLOCK
736 }
737 /* write registers and enable system interrupts */
738 outl (cmd_reg, IM_CMD_REG(host_index));
739 outb (attn_reg, IM_ATTN_REG(host_index));
740 IBMUNLOCK
741 return;
742 }
743
744 static void internal_done (Scsi_Cmnd * cmd)
745 {
746 cmd->SCp.Status++;
747 return;
748 }
749
750 /* SCSI-SCB-command for device_inquiry */
751 static int device_inquiry(int host_index, int ldn)
752 {
753 int retries;
754 struct im_scb *scb;
755 struct im_tsb *tsb;
756 unsigned char *buf;
757
758 scb = &(ld(host_index)[ldn].scb);
759 tsb = &(ld(host_index)[ldn].tsb);
760 buf = (unsigned char *)(&(ld(host_index)[ldn].buf));
761 ld(host_index)[ldn].tsb.dev_status = 0; /* prepare statusblock */
762 for (retries = 0; retries < 3; retries++) {
763 /* fill scb with inquiry command */
764 scb->command = IM_DEVICE_INQUIRY_CMD | IM_NO_DISCONNECT;
765 scb->enable = IM_REPORT_TSB_ONLY_ON_ERROR | IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_RETRY_ENABLE | IM_BYPASS_BUFFER;
766 last_scsi_command(host_index)[ldn] = IM_DEVICE_INQUIRY_CMD;
767 last_scsi_type(host_index)[ldn] = IM_SCB;
768 scb->sys_buf_adr = virt_to_bus(buf);
769 scb->sys_buf_length = 0xff; /* maximum bufferlength gives max info */
770 scb->tsb_adr = virt_to_bus(tsb);
771 /* issue scb to passed ldn, and busy wait for interrupt */
772 got_interrupt(host_index) = 0;
773 issue_cmd (host_index, virt_to_bus(scb), IM_SCB | ldn);
774 while (!got_interrupt(host_index))
775 barrier ();
776
777 /*if command succesful, break */
778 if ((stat_result(host_index) == IM_SCB_CMD_COMPLETED)||
779 (stat_result(host_index) == IM_SCB_CMD_COMPLETED_WITH_RETRIES))
780 return 1;
781 }
782 /*if all three retries failed, return "no device at this ldn" */
783 if (retries >= 3)
784 return 0;
785 else
786 return 1;
787 }
788
789 static int read_capacity(int host_index, int ldn)
790 {
791 int retries;
792 struct im_scb *scb;
793 struct im_tsb *tsb;
794 unsigned char *buf;
795
796 scb = &(ld(host_index)[ldn].scb);
797 tsb = &(ld(host_index)[ldn].tsb);
798 buf = (unsigned char *)(&(ld(host_index)[ldn].buf));
799 ld(host_index)[ldn].tsb.dev_status = 0;
800 for (retries = 0; retries < 3; retries++) {
801 /*fill scb with read capacity command */
802 scb->command = IM_READ_CAPACITY_CMD;
803 scb->enable = IM_REPORT_TSB_ONLY_ON_ERROR | IM_READ_CONTROL | IM_RETRY_ENABLE | IM_BYPASS_BUFFER;
804 last_scsi_command(host_index)[ldn] = IM_READ_CAPACITY_CMD;
805 last_scsi_type(host_index)[ldn] = IM_SCB;
806 scb->sys_buf_adr = virt_to_bus(buf);
807 scb->sys_buf_length = 8;
808 scb->tsb_adr = virt_to_bus(tsb);
809 /*issue scb to passed ldn, and busy wait for interrupt */
810 got_interrupt(host_index) = 0;
811 issue_cmd (host_index, virt_to_bus(scb), IM_SCB | ldn);
812 while (!got_interrupt(host_index))
813 barrier ();
814
815 /*if got capacity, get block length and return one device found */
816 if ((stat_result(host_index) == IM_SCB_CMD_COMPLETED)||
817 (stat_result(host_index) == IM_SCB_CMD_COMPLETED_WITH_RETRIES))
818 return 1;
819 }
820 /*if all three retries failed, return "no device at this ldn" */
821 if (retries >= 3)
822 return 0;
823 else
824 return 1;
825 }
826
827 static int get_pos_info(int host_index)
828 {
829 int retries;
830 struct im_scb *scb;
831 struct im_tsb *tsb;
832 unsigned char *buf;
833
834 scb = &(ld(host_index)[MAX_LOG_DEV].scb);
835 tsb = &(ld(host_index)[MAX_LOG_DEV].tsb);
836 buf = (unsigned char *)(&(ld(host_index)[MAX_LOG_DEV].buf));
837 ld(host_index)[MAX_LOG_DEV].tsb.dev_status = 0;
838 for (retries = 0; retries < 3; retries++) {
839 /*fill scb with get_pos_info command */
840 scb->command = IM_GET_POS_INFO_CMD;
841 scb->enable = IM_READ_CONTROL | IM_REPORT_TSB_ONLY_ON_ERROR | IM_RETRY_ENABLE | IM_BYPASS_BUFFER;
842 last_scsi_command(host_index)[MAX_LOG_DEV] = IM_GET_POS_INFO_CMD;
843 last_scsi_type(host_index)[MAX_LOG_DEV] = IM_SCB;
844 scb->sys_buf_adr = virt_to_bus(buf);
845 if (special(host_index)==IBM_SCSI2_FW)
846 scb->sys_buf_length = 256; /* get all info from F/W adapter */
847 else
848 scb->sys_buf_length = 18; /* get exactly 18 bytes for other SCSI */
849 scb->tsb_adr = virt_to_bus(tsb);
850 /*issue scb to ldn=15, and busy wait for interrupt */
851 got_interrupt(host_index) = 0;
852 issue_cmd (host_index, virt_to_bus(scb), IM_SCB | MAX_LOG_DEV);
853 while (!got_interrupt(host_index))
854 barrier ();
855
856 /*if got POS-stuff, get block length and return one device found */
857 if ((stat_result(host_index) == IM_SCB_CMD_COMPLETED)||
858 (stat_result(host_index) == IM_SCB_CMD_COMPLETED_WITH_RETRIES))
859 return 1;
860 }
861 /* if all three retries failed, return "no device at this ldn" */
862 if (retries >= 3)
863 return 0;
864 else
865 return 1;
866 }
867
868 /* SCSI-immediate-command for assign. This functions maps/unmaps specific
869 ldn-numbers on SCSI (PUN,LUN). It is needed for presetting of the
870 subsystem and for dynamical remapping od ldns. */
871 static int immediate_assign(int host_index, unsigned int pun,
872 unsigned int lun, unsigned int ldn,
873 unsigned int operation)
874 {
875 int retries;
876 unsigned long imm_command;
877
878 for (retries=0; retries<3; retries ++) {
879 /* select mutation level of the SCSI-adapter */
880 switch (special(host_index)) {
881 case IBM_SCSI2_FW:
882 imm_command = (unsigned long)(IM_ASSIGN_IMM_CMD);
883 imm_command |= (unsigned long)((lun & 7) << 24);
884 imm_command |= (unsigned long)((operation & 1) << 23);
885 imm_command |= (unsigned long)((pun & 7)<< 20)|((pun & 8)<< 24);
886 imm_command |= (unsigned long)((ldn & 15) << 16);
887 break;
888 default:
889 imm_command = inl(IM_CMD_REG(host_index));
890 imm_command &= (unsigned long)(0xF8000000); /* keep reserved bits */
891 imm_command |= (unsigned long)(IM_ASSIGN_IMM_CMD);
892 imm_command |= (unsigned long)((lun & 7) << 24);
893 imm_command |= (unsigned long)((operation & 1) << 23);
894 imm_command |= (unsigned long)((pun & 7) << 20);
895 imm_command |= (unsigned long)((ldn & 15) << 16);
896 break;
897 }
898 last_scsi_command(host_index)[MAX_LOG_DEV] = IM_ASSIGN_IMM_CMD;
899 last_scsi_type(host_index)[MAX_LOG_DEV] = IM_IMM_CMD;
900 got_interrupt(host_index) = 0;
901 issue_cmd (host_index, (unsigned long)(imm_command), IM_IMM_CMD | MAX_LOG_DEV);
902 while (!got_interrupt(host_index))
903 barrier ();
904
905 /*if command succesful, break */
906 if (stat_result(host_index) == IM_IMMEDIATE_CMD_COMPLETED)
907 return 1;
908 }
909 if (retries >= 3)
910 return 0;
911 else
912 return 1;
913 }
914
915 static int immediate_feature(int host_index, unsigned int speed,
916 unsigned int timeout)
917 {
918 int retries;
919 unsigned long imm_command;
920
921 for (retries=0; retries<3; retries ++) {
922 /* select mutation level of the SCSI-adapter */
923 imm_command = IM_FEATURE_CTR_IMM_CMD;
924 imm_command |= (unsigned long)((speed & 0x7) << 29);
925 imm_command |= (unsigned long)((timeout & 0x1fff) << 16);
926 last_scsi_command(host_index)[MAX_LOG_DEV] = IM_FEATURE_CTR_IMM_CMD;
927 last_scsi_type(host_index)[MAX_LOG_DEV] = IM_IMM_CMD;
928 got_interrupt(host_index) = 0;
929 /* we need to run into command errors in order to probe for the
930 * right speed! */
931 global_command_error_excuse = 1;
932 issue_cmd (host_index, (unsigned long)(imm_command), IM_IMM_CMD | MAX_LOG_DEV);
933 while (!got_interrupt(host_index))
934 barrier ();
935 if (global_command_error_excuse == CMD_FAIL) {
936 global_command_error_excuse = 0;
937 return 2;
938 } else
939 global_command_error_excuse = 0;
940 /*if command succesful, break */
941 if (stat_result(host_index) == IM_IMMEDIATE_CMD_COMPLETED)
942 return 1;
943 }
944 if (retries >= 3)
945 return 0;
946 else
947 return 1;
948 }
949
950 #ifdef CONFIG_IBMMCA_SCSI_DEV_RESET
951 static int immediate_reset(int host_index, unsigned int ldn)
952 {
953 int retries;
954 int ticks;
955 unsigned long imm_command;
956
957 for (retries=0; retries<3; retries ++) {
958 imm_command = inl(IM_CMD_REG(host_index));
959 imm_command &= (unsigned long)(0xFFFF0000); /* keep reserved bits */
960 imm_command |= (unsigned long)(IM_RESET_IMM_CMD);
961 last_scsi_command(host_index)[ldn] = IM_RESET_IMM_CMD;
962 last_scsi_type(host_index)[ldn] = IM_IMM_CMD;
963 got_interrupt(host_index) = 0;
964 reset_status(host_index) = IM_RESET_IN_PROGRESS;
965 issue_cmd (host_index, (unsigned long)(imm_command), IM_IMM_CMD | ldn);
966 ticks = IM_RESET_DELAY*HZ;
967 while (reset_status(host_index) == IM_RESET_IN_PROGRESS && --ticks) {
968 udelay((1+999/HZ)*1000);
969 barrier();
970 }
971 /* if reset did not complete, just complain */
972 if (!ticks) {
973 printk("IBM MCA SCSI: reset did not complete within %d seconds.\n",
974 IM_RESET_DELAY);
975 reset_status(host_index) = IM_RESET_FINISHED_OK;
976 /* did not work, finish */
977 return 1;
978 }
979 /*if command succesful, break */
980 if (stat_result(host_index) == IM_IMMEDIATE_CMD_COMPLETED)
981 return 1;
982 }
983 if (retries >= 3)
984 return 0;
985 else
986 return 1;
987 }
988 #endif
989
990 /* type-interpreter for physical device numbers */
991 static char *ti_p(int value)
992 {
993 switch (value) {
994 case TYPE_IBM_SCSI_ADAPTER: return("A"); break;
995 case TYPE_DISK: return("D"); break;
996 case TYPE_TAPE: return("T"); break;
997 case TYPE_PROCESSOR: return("P"); break;
998 case TYPE_WORM: return("W"); break;
999 case TYPE_ROM: return("R"); break;
1000 case TYPE_SCANNER: return("S"); break;
1001 case TYPE_MOD: return("M"); break;
1002 case TYPE_MEDIUM_CHANGER: return("C"); break;
1003 case TYPE_NO_LUN: return("+"); break; /* show NO_LUN */
1004 case TYPE_NO_DEVICE:
1005 default: return("-"); break;
1006 }
1007 return("-");
1008 }
1009
1010 /* interpreter for logical device numbers (ldn) */
1011 static char *ti_l(int value)
1012 {
1013 const char hex[16] = "0123456789abcdef";
1014 static char answer[2];
1015
1016 answer[1] = (char)(0x0);
1017 if (value<=MAX_LOG_DEV) answer[0] = hex[value]; else answer[0] = '-';
1018 return (char *)&answer;
1019 }
1020
1021 /* transfers bitpattern of the feature command to values in MHz */
1022 static char *ibmrate(unsigned int speed, int i)
1023 {
1024 switch (speed) {
1025 case 0: if (i) return "5.00"; else return "10.00"; break;
1026 case 1: if (i) return "4.00"; else return "8.00"; break;
1027 case 2: if (i) return "3.33"; else return "6.66"; break;
1028 case 3: if (i) return "2.86"; else return "5.00"; break;
1029 case 4: if (i) return "2.50"; else return "4.00"; break;
1030 case 5: if (i) return "2.22"; else return "3.10"; break;
1031 case 6: if (i) return "2.00"; else return "2.50"; break;
1032 case 7: if (i) return "1.82"; else return "2.00"; break;
1033 }
1034 return "---";
1035 }
1036
1037 static int probe_display(int what)
1038 {
1039 static int rotator = 0;
1040 const char rotor[] = "|/-\\";
1041
1042 if (!(display_mode & LED_DISP))
1043 return 0;
1044 if (!what) {
1045 outl(0x20202020,MOD95_LED_PORT);
1046 outl(0x20202020,MOD95_LED_PORT+4);
1047 } else {
1048 outb('S',MOD95_LED_PORT+7); outb('C',MOD95_LED_PORT+6);
1049 outb('S',MOD95_LED_PORT+5); outb('I',MOD95_LED_PORT+4);
1050 outb('i',MOD95_LED_PORT+3); outb('n',MOD95_LED_PORT+2);
1051 outb('i',MOD95_LED_PORT+1); outb((char)(rotor[rotator]),MOD95_LED_PORT);
1052 rotator++;
1053 if (rotator>3) rotator=0;
1054 }
1055 return 0;
1056 }
1057
1058 static int probe_bus_mode(int host_index)
1059 {
1060 struct im_pos_info *info;
1061 int num_bus = 0;
1062 int ldn;
1063
1064 info = (struct im_pos_info *)(&(ld(host_index)[MAX_LOG_DEV].buf));
1065 if (get_pos_info(host_index)) {
1066 if (info->connector_size & 0xf000)
1067 subsystem_connector_size(host_index)=16;
1068 else
1069 subsystem_connector_size(host_index)=32;
1070 num_bus |= (info->pos_4b & 8) >> 3;
1071 for (ldn=0; ldn<=MAX_LOG_DEV; ldn++) {
1072 if ((special(host_index)==IBM_SCSI_WCACHE)||
1073 (special(host_index)==IBM_7568_WCACHE)) {
1074 if (!((info->cache_stat >> ldn) & 1))
1075 ld(host_index)[ldn].cache_flag = 0;
1076 }
1077 if (!((info->retry_stat >> ldn) & 1))
1078 ld(host_index)[ldn].retry_flag = 0;
1079 }
1080 #ifdef IM_DEBUG_PROBE
1081 printk("IBM MCA SCSI: SCSI-Cache bits: ");
1082 for (ldn=0; ldn<=MAX_LOG_DEV; ldn++) {
1083 printk("%d",ld(host_index)[ldn].cache_flag);
1084 }
1085 printk("\nIBM MCA SCSI: SCSI-Retry bits: ");
1086 for (ldn=0; ldn<=MAX_LOG_DEV; ldn++) {
1087 printk("%d",ld(host_index)[ldn].retry_flag);
1088 }
1089 printk("\n");
1090 #endif
1091 }
1092 return num_bus;
1093 }
1094
1095 /* probing scsi devices */
1096 static void check_devices (int host_index, int adaptertype)
1097 {
1098 int id, lun, ldn, ticks;
1099 int count_devices; /* local counter for connected device */
1100 int max_pun;
1101 int num_bus;
1102 int speedrun; /* local adapter_speed check variable */
1103
1104 /* assign default values to certain variables */
1105 ticks = 0;
1106 count_devices = 0;
1107 IBM_DS(host_index).dyn_flag = 0; /* normally no need for dynamical ldn management */
1108 IBM_DS(host_index).total_errors = 0; /* set errorcounter to 0 */
1109 next_ldn(host_index) = 7; /* next ldn to be assigned is 7, because 0-6 is 'hardwired'*/
1110
1111 /* initialize the very important driver-informational arrays/structs */
1112 memset (ld(host_index), 0, sizeof(ld(host_index)));
1113 for (ldn=0; ldn<=MAX_LOG_DEV; ldn++) {
1114 last_scsi_command(host_index)[ldn] = NO_SCSI; /* emptify last SCSI-command storage */
1115 last_scsi_type(host_index)[ldn] = 0;
1116 ld(host_index)[ldn].cache_flag = 1;
1117 ld(host_index)[ldn].retry_flag = 1;
1118 }
1119 memset (get_ldn(host_index), TYPE_NO_DEVICE, sizeof(get_ldn(host_index))); /* this is essential ! */
1120 memset (get_scsi(host_index), TYPE_NO_DEVICE, sizeof(get_scsi(host_index))); /* this is essential ! */
1121 for (lun=0; lun<8; lun++) {
1122 /* mark the adapter at its pun on all luns*/
1123 get_scsi(host_index)[subsystem_pun(host_index)][lun] = TYPE_IBM_SCSI_ADAPTER;
1124 get_ldn(host_index)[subsystem_pun(host_index)][lun] = MAX_LOG_DEV; /* make sure, the subsystem
1125 ldn is active for all
1126 luns. */
1127 }
1128 probe_display(0); /* Supercool display usage during SCSI-probing. */
1129 /* This makes sense, when booting without any */
1130 /* monitor connected on model XX95. */
1131
1132 /* STEP 1: */
1133 adapter_speed(host_index) = global_adapter_speed;
1134 speedrun = adapter_speed(host_index);
1135 while (immediate_feature(host_index,speedrun,adapter_timeout)==2) {
1136 probe_display(1);
1137 if (speedrun==7)
1138 panic("IBM MCA SCSI: Cannot set Synchronous-Transfer-Rate!\n");
1139 speedrun++;
1140 if (speedrun>7)
1141 speedrun=7;
1142 }
1143 adapter_speed(host_index) = speedrun;
1144 /* Get detailed information about the current adapter, necessary for
1145 * device operations: */
1146 num_bus=probe_bus_mode(host_index);
1147
1148 /* num_bus contains only valid data for the F/W adapter! */
1149 if (adaptertype==IBM_SCSI2_FW) { /* F/W SCSI adapter: */
1150 /* F/W adapter PUN-space extension evaluation: */
1151 if (num_bus) {
1152 printk("IBM MCA SCSI: Seperate bus mode (wide-addressing enabled)\n");
1153 subsystem_maxid(host_index) = 16;
1154 } else {
1155 printk("IBM MCA SCSI: Combined bus mode (wide-addressing disabled)\n");
1156 subsystem_maxid(host_index) = 8;
1157 }
1158 printk("IBM MCA SCSI: Sync.-Rate (F/W: 20, Int.: 10, Ext.: %s) MBytes/s\n",
1159 ibmrate(speedrun,adaptertype));
1160 } else /* all other IBM SCSI adapters: */
1161 printk("IBM MCA SCSI: Synchronous-SCSI-Transfer-Rate: %s MBytes/s\n",
1162 ibmrate(speedrun,adaptertype));
1163
1164 /* assign correct PUN device space */
1165 max_pun = subsystem_maxid(host_index);
1166
1167 #ifdef IM_DEBUG_PROBE
1168 printk("IBM MCA SCSI: Current SCSI-host index: %d\n",host_index);
1169 printk("IBM MCA SCSI: Removing default logical SCSI-device mapping.");
1170 #else
1171 printk("IBM MCA SCSI: Dev. Order: %s, Mapping (takes <2min): ",
1172 (ibm_ansi_order) ? "ANSI" : "New");
1173 #endif
1174 for (ldn=0; ldn<MAX_LOG_DEV; ldn++) {
1175 probe_display(1);
1176 #ifdef IM_DEBUG_PROBE
1177 printk(".");
1178 #endif
1179 immediate_assign(host_index,0,0,ldn,REMOVE_LDN); /* remove ldn (wherever)*/
1180 }
1181 lun = 0; /* default lun is 0 */
1182 #ifndef IM_DEBUG_PROBE
1183 printk("cleared,");
1184 #endif
1185 /* STEP 2: */
1186 #ifdef IM_DEBUG_PROBE
1187 printk("\nIBM MCA SCSI: Scanning SCSI-devices.");
1188 #endif
1189 for (id=0; id<max_pun ; id++)
1190 #ifdef CONFIG_SCSI_MULTI_LUN
1191 for (lun=0; lun<8; lun++)
1192 #endif
1193 {
1194 probe_display(1);
1195 #ifdef IM_DEBUG_PROBE
1196 printk(".");
1197 #endif
1198 if (id != subsystem_pun(host_index)) {
1199 /* if pun is not the adapter: */
1200 /* set ldn=0 to pun,lun*/
1201 immediate_assign(host_index,id,lun,PROBE_LDN,SET_LDN);
1202 if (device_inquiry(host_index, PROBE_LDN)) { /* probe device */
1203 get_scsi(host_index)[id][lun]=
1204 (unsigned char)(ld(host_index)[PROBE_LDN].buf[0]);
1205 /* entry, even for NO_LUN */
1206 if (ld(host_index)[PROBE_LDN].buf[0] != TYPE_NO_LUN)
1207 count_devices++; /* a existing device is found */
1208 }
1209 /* remove ldn */
1210 immediate_assign(host_index,id,lun,PROBE_LDN,REMOVE_LDN);
1211 }
1212 }
1213 #ifndef IM_DEBUG_PROBE
1214 printk("scanned,");
1215 #endif
1216 /* STEP 3: */
1217 #ifdef IM_DEBUG_PROBE
1218 printk("\nIBM MCA SCSI: Mapping SCSI-devices.");
1219 #endif
1220 ldn = 0;
1221 lun = 0;
1222 #ifdef CONFIG_SCSI_MULTI_LUN
1223 for (lun=0; lun<8 && ldn<MAX_LOG_DEV; lun++)
1224 #endif
1225 for (id=0; id<max_pun && ldn<MAX_LOG_DEV; id++) {
1226 probe_display(1);
1227 #ifdef IM_DEBUG_PROBE
1228 printk(".");
1229 #endif
1230 if (id != subsystem_pun(host_index)) {
1231 if (get_scsi(host_index)[id][lun] != TYPE_NO_LUN &&
1232 get_scsi(host_index)[id][lun] != TYPE_NO_DEVICE) {
1233 /* Only map if accepted type. Always enter for
1234 lun == 0 to get no gaps into ldn-mapping for ldn<7. */
1235 immediate_assign(host_index,id,lun,ldn,SET_LDN);
1236 get_ldn(host_index)[id][lun]=ldn; /* map ldn */
1237 if (device_exists (host_index, ldn,
1238 &ld(host_index)[ldn].block_length,
1239 &ld(host_index)[ldn].device_type)) {
1240 #ifdef CONFIG_IBMMCA_SCSI_DEV_RESET
1241 printk("resetting device at ldn=%x ... ",ldn);
1242 immediate_reset(host_index,ldn);
1243 #endif
1244 ldn++;
1245 } else {
1246 /* device vanished, probably because we don't know how to
1247 * handle it or because it has problems */
1248 if (lun > 0) {
1249 /* remove mapping */
1250 get_ldn(host_index)[id][lun]=TYPE_NO_DEVICE;
1251 immediate_assign(host_index,0,0,ldn,REMOVE_LDN);
1252 } else ldn++;
1253 }
1254 } else if (lun == 0) {
1255 /* map lun == 0, even if no device exists */
1256 immediate_assign(host_index,id,lun,ldn,SET_LDN);
1257 get_ldn(host_index)[id][lun]=ldn; /* map ldn */
1258 ldn++;
1259 }
1260 }
1261 }
1262 /* STEP 4: */
1263
1264 /* map remaining ldns to non-existing devices */
1265 for (lun=1; lun<8 && ldn<MAX_LOG_DEV; lun++)
1266 for (id=0; id<max_pun && ldn<MAX_LOG_DEV; id++) {
1267 if (get_scsi(host_index)[id][lun] == TYPE_NO_LUN ||
1268 get_scsi(host_index)[id][lun] == TYPE_NO_DEVICE) {
1269 probe_display(1);
1270 /* Map remaining ldns only to NON-existing pun,lun
1271 combinations to make sure an inquiry will fail.
1272 For MULTI_LUN, it is needed to avoid adapter autonome
1273 SCSI-remapping. */
1274 immediate_assign(host_index,id,lun,ldn,SET_LDN);
1275 get_ldn(host_index)[id][lun]=ldn;
1276 ldn++;
1277 }
1278 }
1279 #ifndef IM_DEBUG_PROBE
1280 printk("mapped.");
1281 #endif
1282 printk("\n");
1283 #ifdef IM_DEBUG_PROBE
1284 if (ibm_ansi_order)
1285 printk("IBM MCA SCSI: Device order: IBM/ANSI (pun=7 is first).\n");
1286 else
1287 printk("IBM MCA SCSI: Device order: New Industry Standard (pun=0 is first).\n");
1288 #endif
1289
1290 #ifdef IM_DEBUG_PROBE
1291 /* Show the physical and logical mapping during boot. */
1292 printk("IBM MCA SCSI: Determined SCSI-device-mapping:\n");
1293 printk(" Physical SCSI-Device Map Logical SCSI-Device Map\n");
1294 printk("ID\\LUN 0 1 2 3 4 5 6 7 ID\\LUN 0 1 2 3 4 5 6 7\n");
1295 for (id=0; id<max_pun; id++) {
1296 printk("%2d ",id);
1297 for (lun=0; lun<8; lun++)
1298 printk("%2s ",ti_p(get_scsi(host_index)[id][lun]));
1299 printk(" %2d ",id);
1300 for (lun=0; lun<8; lun++)
1301 printk("%2s ",ti_l(get_ldn(host_index)[id][lun]));
1302 printk("\n");
1303 }
1304 #endif
1305
1306 /* assign total number of found SCSI-devices to the statistics struct */
1307 IBM_DS(host_index).total_scsi_devices = count_devices;
1308
1309 /* decide for output in /proc-filesystem, if the configuration of
1310 SCSI-devices makes dynamical reassignment of devices necessary */
1311 if (count_devices>=MAX_LOG_DEV)
1312 IBM_DS(host_index).dyn_flag = 1; /* dynamical assignment is necessary */
1313 else
1314 IBM_DS(host_index).dyn_flag = 0; /* dynamical assignment is not necessary */
1315
1316 /* If no SCSI-devices are assigned, return 1 in order to cause message. */
1317 if (ldn == 0)
1318 printk("IBM MCA SCSI: Warning: No SCSI-devices found/assigned!\n");
1319
1320 /* reset the counters for statistics on the current adapter */
1321 IBM_DS(host_index).scbs = 0;
1322 IBM_DS(host_index).long_scbs = 0;
1323 IBM_DS(host_index).total_accesses = 0;
1324 IBM_DS(host_index).total_interrupts = 0;
1325 IBM_DS(host_index).dynamical_assignments = 0;
1326 memset (IBM_DS(host_index).ldn_access, 0x0,
1327 sizeof (IBM_DS(host_index).ldn_access));
1328 memset (IBM_DS(host_index).ldn_read_access, 0x0,
1329 sizeof (IBM_DS(host_index).ldn_read_access));
1330 memset (IBM_DS(host_index).ldn_write_access, 0x0,
1331 sizeof (IBM_DS(host_index).ldn_write_access));
1332 memset (IBM_DS(host_index).ldn_inquiry_access, 0x0,
1333 sizeof (IBM_DS(host_index).ldn_inquiry_access));
1334 memset (IBM_DS(host_index).ldn_modeselect_access, 0x0,
1335 sizeof (IBM_DS(host_index).ldn_modeselect_access));
1336 memset (IBM_DS(host_index).ldn_assignments, 0x0,
1337 sizeof (IBM_DS(host_index).ldn_assignments));
1338 probe_display(0);
1339 return;
1340 }
1341
1342 static int device_exists (int host_index, int ldn, int *block_length,
1343 int *device_type)
1344 {
1345 unsigned char *buf;
1346 /* if no valid device found, return immediately with 0 */
1347 if (!(device_inquiry(host_index, ldn)))
1348 return 0;
1349 buf = (unsigned char *)(&(ld(host_index)[ldn].buf));
1350 if (*buf == TYPE_ROM) {
1351 *device_type = TYPE_ROM;
1352 *block_length = 2048; /* (standard blocksize for yellow-/red-book) */
1353 return 1;
1354 }
1355 if (*buf == TYPE_WORM) {
1356 *device_type = TYPE_WORM;
1357 *block_length = 2048;
1358 return 1;
1359 }
1360 if (*buf == TYPE_DISK) {
1361 *device_type = TYPE_DISK;
1362 if (read_capacity( host_index, ldn)) {
1363 *block_length = *(buf+7) + (*(buf+6) << 8) +
1364 (*(buf+5) << 16) + (*(buf+4) << 24);
1365 return 1;
1366 } else
1367 return 0;
1368 }
1369 if (*buf == TYPE_MOD) {
1370 *device_type = TYPE_MOD;
1371 if (read_capacity( host_index, ldn)) {
1372 *block_length = *(buf+7) + (*(buf+6) << 8) +
1373 (*(buf+5) << 16) + (*(buf+4) << 24);
1374 return 1;
1375 } else
1376 return 0;
1377 }
1378 if (*buf == TYPE_TAPE) {
1379 *device_type = TYPE_TAPE;
1380 *block_length = 0; /* not in use (setting by mt and mtst in op.) */
1381 return 1;
1382 }
1383 if (*buf == TYPE_PROCESSOR) {
1384 *device_type = TYPE_PROCESSOR;
1385 *block_length = 0; /* they set their stuff on drivers */
1386 return 1;
1387 }
1388 if (*buf == TYPE_SCANNER) {
1389 *device_type = TYPE_SCANNER;
1390 *block_length = 0; /* they set their stuff on drivers */
1391 return 1;
1392 }
1393 if (*buf == TYPE_MEDIUM_CHANGER) {
1394 *device_type = TYPE_MEDIUM_CHANGER;
1395 *block_length = 0; /* One never knows, what to expect on a medium
1396 changer device. */
1397 return 1;
1398 }
1399 return 0;
1400 }
1401
1402 #ifdef CONFIG_SCSI_IBMMCA
1403 void internal_ibmmca_scsi_setup (char *str, int *ints)
1404 {
1405 int i, j, io_base, id_base;
1406 char *token;
1407
1408 io_base = 0;
1409 id_base = 0;
1410 if (str) {
1411 token = strtok(str,",");
1412 j = 0;
1413 while (token) {
1414 if (!strcmp(token,"activity")) display_mode |= LED_ACTIVITY;
1415 if (!strcmp(token,"display")) display_mode |= LED_DISP;
1416 if (!strcmp(token,"adisplay")) display_mode |= LED_ADISP;
1417 if (!strcmp(token,"normal")) ibm_ansi_order = 0;
1418 if (!strcmp(token,"ansi")) ibm_ansi_order = 1;
1419 if (!strcmp(token,"fast")) global_adapter_speed = 0;
1420 if (!strcmp(token,"medium")) global_adapter_speed = 4;
1421 if (!strcmp(token,"slow")) global_adapter_speed = 7;
1422 if ((*token == '-') || (isdigit(*token))) {
1423 if (!(j%2) && (io_base < IM_MAX_HOSTS))
1424 io_port[io_base++] = simple_strtoul(token,NULL,0);
1425 if ((j%2) && (id_base < IM_MAX_HOSTS))
1426 scsi_id[id_base++] = simple_strtoul(token,NULL,0);
1427 j++;
1428 }
1429 token = strtok(NULL,",");
1430 }
1431 } else if (ints) {
1432 for (i = 0; i < IM_MAX_HOSTS && 2*i+2 < ints[0]; i++) {
1433 io_port[i] = ints[2*i+2];
1434 scsi_id[i] = ints[2*i+2];
1435 }
1436 }
1437 return;
1438 }
1439 #endif
1440
1441 static int ibmmca_getinfo (char *buf, int slot, void *dev)
1442 {
1443 struct Scsi_Host *shpnt;
1444 int len, speciale, connectore, k;
1445 unsigned int pos[8];
1446 unsigned long flags;
1447
1448 IBMLOCK
1449 shpnt = dev; /* assign host-structure to local pointer */
1450 len = 0; /* set filled text-buffer index to 0 */
1451 /* get the _special contents of the hostdata structure */
1452 speciale = ((struct ibmmca_hostdata *)shpnt->hostdata)->_special;
1453 connectore = ((struct ibmmca_hostdata *)shpnt->hostdata)->_connector_size;
1454 for (k=2;k<4;k++)
1455 pos[k] = ((struct ibmmca_hostdata *)shpnt->hostdata)->_pos[k];
1456 if (speciale == FORCED_DETECTION) { /* forced detection */
1457 len += sprintf (buf+len,
1458 "Adapter category: forced detected\n"
1459 "***************************************\n"
1460 "*** Forced detected SCSI Adapter ***\n"
1461 "*** No chip-information available ***\n"
1462 "***************************************\n");
1463 } else if (speciale == INTEGRATED_SCSI) {
1464 /* if the integrated subsystem has been found automatically: */
1465 len += sprintf (buf+len,
1466 "Adapter category: integrated\n"
1467 "Chip revision level: %d\n"
1468 "Chip status: %s\n"
1469 "8 kByte NVRAM status: %s\n",
1470 ((pos[2] & 0xf0) >> 4),
1471 (pos[2] & 1) ? "enabled" : "disabled",
1472 (pos[2] & 2) ? "locked" : "accessible");
1473 } else if ((speciale>=0)&&
1474 (speciale<(sizeof(subsys_list)/sizeof(struct subsys_list_struct)))) {
1475 /* if the subsystem is a slot adapter */
1476 len += sprintf (buf+len,
1477 "Adapter category: slot-card\n"
1478 "ROM Segment Address: ");
1479 if ((pos[2] & 0xf0) == 0xf0)
1480 len += sprintf (buf+len, "off\n");
1481 else
1482 len += sprintf (buf+len, "0x%x\n",
1483 ((pos[2] & 0xf0) << 13) + 0xc0000);
1484 len += sprintf (buf + len, "Chip status: %s\n",
1485 (pos[2] & 1) ? "enabled" : "disabled");
1486 len += sprintf (buf + len, "Adapter I/O Offset: 0x%x\n",
1487 ((pos[2] & 0x0e) << 2));
1488 } else {
1489 len += sprintf (buf + len, "Adapter category: unknown\n");
1490 }
1491 /* common subsystem information to write to the slotn file */
1492 len += sprintf (buf + len, "Subsystem PUN: %d\n", shpnt->this_id);
1493 len += sprintf (buf + len, "I/O base address range: 0x%x-0x%x\n",
1494 (unsigned int)(shpnt->io_port),
1495 (unsigned int)(shpnt->io_port+7));
1496 len += sprintf (buf + len, "MCA-slot size: %d bits",connectore);
1497 /* Now make sure, the bufferlength is devidable by 4 to avoid
1498 * paging problems of the buffer. */
1499 while ( len % sizeof( int ) != ( sizeof ( int ) - 1 ) )
1500 len += sprintf (buf+len, " ");
1501 len += sprintf (buf+len, "\n");
1502 IBMUNLOCK
1503 return len;
1504 }
1505
1506 int ibmmca_detect (Scsi_Host_Template * scsi_template)
1507 {
1508 struct Scsi_Host *shpnt;
1509 int port, id, i, j, k, list_size, slot;
1510 int devices_on_irq_11 = 0;
1511 int devices_on_irq_14 = 0;
1512 int IRQ14_registered = 0;
1513 int IRQ11_registered = 0;
1514
1515 found = 0; /* make absolutely sure, that found is set to 0 */
1516
1517 /* First of all, print the version number of the driver. This is
1518 * important to allow better user bugreports in case of already
1519 * having problems with the MCA_bus probing. */
1520 printk("IBM MCA SCSI: Version %s\n",IBMMCA_SCSI_DRIVER_VERSION);
1521 /* if this is not MCA machine, return "nothing found" */
1522 if (!MCA_bus) {
1523 printk("IBM MCA SCSI: No Microchannel-bus present --> Aborting.\n"
1524 " This machine does not have any IBM MCA-bus\n"
1525 " or the MCA-Kernel-support is not enabled!\n");
1526 return 0;
1527 }
1528
1529 #ifdef MODULE
1530 /* If the driver is run as module, read from conf.modules or cmd-line */
1531 if (boot_options) option_setup(boot_options);
1532 #endif
1533
1534 /* get interrupt request level */
1535 if (request_irq (IM_IRQ, interrupt_handler, SA_SHIRQ, "ibmmcascsi",
1536 hosts)) {
1537 printk("IBM MCA SCSI: Unable to get shared IRQ %d.\n", IM_IRQ);
1538 return 0;
1539 } else
1540 IRQ14_registered++;
1541
1542 /* if ibmmcascsi setup option was passed to kernel, return "found" */
1543 for (i = 0; i < IM_MAX_HOSTS; i++)
1544 if (io_port[i] > 0 && scsi_id[i] >= 0 && scsi_id[i] < 8) {
1545 printk("IBM MCA SCSI: forced detected SCSI Adapter, io=0x%x, scsi id=%d.\n",
1546 io_port[i], scsi_id[i]);
1547 if ((shpnt = ibmmca_register(scsi_template, io_port[i], scsi_id[i],
1548 FORCED_DETECTION, "forced detected SCSI Adapter"))) {
1549 for (k=2;k<7;k++)
1550 ((struct ibmmca_hostdata *)shpnt->hostdata)->_pos[k] = 0;
1551 ((struct ibmmca_hostdata *)shpnt->hostdata)->_special = FORCED_DETECTION;
1552 mca_set_adapter_name(MCA_INTEGSCSI, "forced detected SCSI Adapter");
1553 mca_set_adapter_procfn(MCA_INTEGSCSI, (MCA_ProcFn) ibmmca_getinfo,
1554 shpnt);
1555 mca_mark_as_used(MCA_INTEGSCSI);
1556 devices_on_irq_14++;
1557 }
1558 }
1559 if (found) return found;
1560
1561 /* The POS2-register of all PS/2 model SCSI-subsystems has the following
1562 * interpretation of bits:
1563 * Bit 7 - 4 : Chip Revision ID (Release)
1564 * Bit 3 - 2 : Reserved
1565 * Bit 1 : 8k NVRAM Disabled
1566 * Bit 0 : Chip Enable (EN-Signal)
1567 * The POS3-register is interpreted as follows:
1568 * Bit 7 - 5 : SCSI ID
1569 * Bit 4 : Reserved = 0
1570 * Bit 3 - 0 : Reserved = 0
1571 * (taken from "IBM, PS/2 Hardware Interface Technical Reference, Common
1572 * Interfaces (1991)").
1573 * In short words, this means, that IBM PS/2 machines only support
1574 * 1 single subsystem by default. The slot-adapters must have another
1575 * configuration on pos2. Here, one has to assume the following
1576 * things for POS2-register:
1577 * Bit 7 - 4 : Chip Revision ID (Release)
1578 * Bit 3 - 1 : port offset factor
1579 * Bit 0 : Chip Enable (EN-Signal)
1580 * As I found a patch here, setting the IO-registers to 0x3540 forced,
1581 * as there was a 0x05 in POS2 on a model 56, I assume, that the
1582 * port 0x3540 must be fix for integrated SCSI-controllers.
1583 * Ok, this discovery leads to the following implementation: (M.Lang) */
1584
1585 /* first look for the IBM SCSI integrated subsystem on the motherboard */
1586 for (j=0;j<8;j++) /* read the pos-information */
1587 pos[j] = mca_read_stored_pos(MCA_INTEGSCSI,j);
1588 /* pos2 = pos3 = 0xff if there is no integrated SCSI-subsystem present, but
1589 * if we ignore the settings of all surrounding pos registers, it is not
1590 * completely sufficient to only check pos2 and pos3. */
1591 /* Therefore, now the following if statement is used to
1592 * make sure, we see a real integrated onboard SCSI-interface and no
1593 * internal system information, which gets mapped to some pos registers
1594 * on models 95xx. */
1595 if ((!pos[0] && !pos[1] && pos[2]>0 && pos[3]>0 && !pos[4] && !pos[5] && !pos[6] && !pos[7]) ||
1596 (pos[0]==0xff && pos[1]==0xff && pos[2]<0xff && pos[3]<0xff && pos[4]==0xff && pos[5]==0xff && pos[6]==0xff && pos[7]==0xff)) {
1597 if ((pos[2] & 1) == 1) /* is the subsystem chip enabled ? */
1598 port = IM_IO_PORT;
1599 else { /* if disabled, no IRQs will be generated, as the chip won't
1600 * listen to the incomming commands and will do really nothing,
1601 * except for listening to the pos-register settings. If this
1602 * happens, I need to hugely think about it, as one has to
1603 * write something to the MCA-Bus pos register in order to
1604 * enable the chip. Normally, IBM-SCSI won't pass the POST,
1605 * when the chip is disabled (see IBM tech. ref.). */
1606 port = IM_IO_PORT; /* anyway, set the portnumber and warn */
1607 printk("IBM MCA SCSI: WARNING - Your SCSI-subsystem is disabled!\n"
1608 " SCSI-operations may not work.\n");
1609 }
1610 id = (pos[3] & 0xe0) >> 5; /* this is correct and represents the PUN */
1611 /* give detailed information on the subsystem. This helps me
1612 * additionally during debugging and analyzing bug-reports. */
1613 printk("IBM MCA SCSI: IBM Integrated SCSI Controller found, io=0x%x, scsi id=%d,\n"
1614 " chip rev.=%d, 8K NVRAM=%s, subsystem=%s\n",
1615 port, id,
1616 ((pos[2] & 0xf0) >> 4), (pos[2] & 2) ? "locked" : "accessible",
1617 (pos[2] & 1) ? "enabled." : "disabled.");
1618
1619 /* register the found integrated SCSI-subsystem */
1620 if ((shpnt = ibmmca_register(scsi_template, port, id, INTEGRATED_SCSI,
1621 "IBM Integrated SCSI Controller"))) {
1622 for (k=2;k<7;k++)
1623 ((struct ibmmca_hostdata *)shpnt->hostdata)->_pos[k] = pos[k];
1624 ((struct ibmmca_hostdata *)shpnt->hostdata)->_special = INTEGRATED_SCSI;
1625 mca_set_adapter_name(MCA_INTEGSCSI, "IBM Integrated SCSI Controller");
1626 mca_set_adapter_procfn(MCA_INTEGSCSI, (MCA_ProcFn) ibmmca_getinfo,
1627 shpnt);
1628 mca_mark_as_used(MCA_INTEGSCSI);
1629 devices_on_irq_14++;
1630 }
1631 }
1632
1633 /* now look for other adapters in MCA slots, */
1634 /* determine the number of known IBM-SCSI-subsystem types */
1635 /* see the pos[2] dependence to get the adapter port-offset. */
1636 list_size = sizeof(subsys_list) / sizeof(struct subsys_list_struct);
1637 for (i = 0; i < list_size; i++) {
1638 /* scan each slot for a fitting adapter id */
1639 slot = 0; /* start at slot 0 */
1640 while ((slot = mca_find_adapter(subsys_list[i].mca_id, slot))
1641 != MCA_NOTFOUND) { /* scan through all slots */
1642 for (j=0;j<8;j++) /* read the pos-information */
1643 pos[j] = mca_read_stored_pos(slot, j);
1644 if ((pos[2] & 1) == 1) /* is the subsystem chip enabled ? */
1645 /* (explanations see above) */
1646 port = IM_IO_PORT + ((pos[2] & 0x0e) << 2);
1647 else {
1648 /* anyway, set the portnumber and warn */
1649 port = IM_IO_PORT + ((pos[2] & 0x0e) << 2);
1650 printk("IBM MCA SCSI: WARNING - Your SCSI-subsystem is disabled!\n"
1651 " SCSI-operations may not work.\n");
1652 }
1653 if ((i==IBM_SCSI2_FW)&&(pos[6]!=0)) {
1654 printk("IBM MCA SCSI: ERROR - Wrong POS(6)-register setting!\n"
1655 " Impossible to determine adapter PUN!\n"
1656 " Guessing adapter PUN = 7.\n");
1657 id = 7;
1658 } else {
1659 id = (pos[3] & 0xe0) >> 5; /* get subsystem PUN */
1660 if (i==IBM_SCSI2_FW) {
1661 id |= (pos[3] & 0x10) >> 1; /* get subsystem PUN high-bit
1662 * for F/W adapters */
1663 }
1664 }
1665 if ((i==IBM_SCSI2_FW)&&(pos[4] & 0x01)&&(pos[6]==0)) {
1666 /* IRQ11 is used by SCSI-2 F/W Adapter/A */
1667 printk("IBM MCA SCSI: SCSI-2 F/W adapter needs IRQ 11.\n");
1668 /* get interrupt request level */
1669 if (request_irq (IM_IRQ_FW, interrupt_handler, SA_SHIRQ,
1670 "ibmmcascsi", hosts)) {
1671 printk("IBM MCA SCSI: Unable to get shared IRQ %d.\n",
1672 IM_IRQ_FW);
1673 } else
1674 IRQ11_registered++;
1675 }
1676 printk("IBM MCA SCSI: %s found in slot %d, io=0x%x, scsi id=%d,\n",
1677 subsys_list[i].description, slot + 1, port, id);
1678 if ((pos[2] & 0xf0) == 0xf0)
1679 printk(" ROM Addr.=off,");
1680 else
1681 printk(" ROM Addr.=0x%x,",
1682 ((pos[2] & 0xf0) << 13) + 0xc0000);
1683 printk(" port-offset=0x%x, subsystem=%s\n",
1684 ((pos[2] & 0x0e) << 2),
1685 (pos[2] & 1) ? "enabled." : "disabled.");
1686
1687 /* register the hostadapter */
1688 if ((shpnt = ibmmca_register(scsi_template, port, id, i,
1689 subsys_list[i].description))) {
1690 for (k=2;k<8;k++)
1691 ((struct ibmmca_hostdata *)shpnt->hostdata)->_pos[k] = pos[k];
1692 ((struct ibmmca_hostdata *)shpnt->hostdata)->_special = i;
1693 mca_set_adapter_name (slot, subsys_list[i].description);
1694 mca_set_adapter_procfn (slot, (MCA_ProcFn) ibmmca_getinfo,
1695 shpnt);
1696 mca_mark_as_used(slot);
1697 if ((i==IBM_SCSI2_FW)&&(pos[4] & 0x01)&&(pos[6]==0))
1698 devices_on_irq_11++;
1699 else
1700 devices_on_irq_14++;
1701 }
1702 slot++; /* advance to next slot */
1703 } /* advance to next adapter id in the list of IBM-SCSI-subsystems*/
1704 }
1705
1706 /* now check for SCSI-adapters, mapped to the integrated SCSI
1707 * area. E.g. a W/Cache in MCA-slot 9(!). Do the check correct here,
1708 * as this is a known effect on some models 95xx. */
1709 list_size = sizeof(subsys_list) / sizeof(struct subsys_list_struct);
1710 for (i = 0; i < list_size; i++) {
1711 /* scan each slot for a fitting adapter id */
1712 slot = mca_find_adapter(subsys_list[i].mca_id, MCA_INTEGSCSI);
1713 if (slot != MCA_NOTFOUND) { /* scan through all slots */
1714 for (j=0;j<8;j++) /* read the pos-information */
1715 pos[j] = mca_read_stored_pos(slot, j);
1716 if ((pos[2] & 1) == 1) { /* is the subsystem chip enabled ? */
1717 /* (explanations see above) */
1718 port = IM_IO_PORT + ((pos[2] & 0x0e) << 2);
1719 } else { /* anyway, set the portnumber and warn */
1720 port = IM_IO_PORT + ((pos[2] & 0x0e) << 2);
1721 printk("IBM MCA SCSI: WARNING - Your SCSI-subsystem is disabled!\n"
1722 " SCSI-operations may not work.\n");
1723 }
1724 if ((i==IBM_SCSI2_FW)&&(pos[6]!=0)) {
1725 printk("IBM MCA SCSI: ERROR - Wrong POS(6)-register setting!\n"
1726 " Impossible to determine adapter PUN!\n"
1727 " Guessing adapter PUN = 7.\n");
1728 id = 7;
1729 } else {
1730 id = (pos[3] & 0xe0) >> 5; /* get subsystem PUN */
1731 if (i==IBM_SCSI2_FW)
1732 id |= (pos[3] & 0x10) >> 1; /* get subsystem PUN high-bit
1733 * for F/W adapters */
1734 }
1735 if ((i==IBM_SCSI2_FW)&&(pos[4] & 0x01)&&(pos[6]==0)) {
1736 /* IRQ11 is used by SCSI-2 F/W Adapter/A */
1737 printk("IBM MCA SCSI: SCSI-2 F/W adapter needs IRQ 11.\n");
1738 /* get interrupt request level */
1739 if (request_irq (IM_IRQ_FW, interrupt_handler, SA_SHIRQ,
1740 "ibmmcascsi", hosts))
1741 printk("IBM MCA SCSI: Unable to get shared IRQ %d.\n",
1742 IM_IRQ_FW);
1743 else
1744 IRQ11_registered++;
1745 }
1746 printk("IBM MCA SCSI: %s found in slot %d, io=0x%x, scsi id=%d,\n",
1747 subsys_list[i].description, slot + 1, port, id);
1748 if ((pos[2] & 0xf0) == 0xf0)
1749 printk(" ROM Addr.=off,");
1750 else
1751 printk(" ROM Addr.=0x%x,",
1752 ((pos[2] & 0xf0) << 13) + 0xc0000);
1753 printk(" port-offset=0x%x, subsystem=%s\n",
1754 ((pos[2] & 0x0e) << 2),
1755 (pos[2] & 1) ? "enabled." : "disabled.");
1756
1757 /* register the hostadapter */
1758 if ((shpnt = ibmmca_register(scsi_template, port, id, i,
1759 subsys_list[i].description))) {
1760 for (k=2;k<7;k++)
1761 ((struct ibmmca_hostdata *)shpnt->hostdata)->_pos[k] = pos[k];
1762 ((struct ibmmca_hostdata *)shpnt->hostdata)->_special = i;
1763 mca_set_adapter_name (slot, subsys_list[i].description);
1764 mca_set_adapter_procfn (slot, (MCA_ProcFn) ibmmca_getinfo, shpnt);
1765 mca_mark_as_used(slot);
1766 if ((i==IBM_SCSI2_FW)&&(pos[4] & 0x01)&&(pos[6]==0))
1767 devices_on_irq_11++;
1768 else
1769 devices_on_irq_14++;
1770 }
1771 slot++; /* advance to next slot */
1772 } /* advance to next adapter id in the list of IBM-SCSI-subsystems*/
1773 }
1774 if ( IRQ11_registered && !devices_on_irq_11 )
1775 free_irq(IM_IRQ_FW, hosts); /* no devices on IRQ 11 */
1776 if ( IRQ14_registered && !devices_on_irq_14 )
1777 free_irq(IM_IRQ, hosts); /* no devices on IRQ 14 */
1778 if ( !devices_on_irq_11 && !devices_on_irq_14 )
1779 printk("IBM MCA SCSI: No IBM SCSI-subsystem adapter attached.\n");
1780 return found; /* return the number of found SCSI hosts. Should be 1 or 0. */
1781 }
1782
1783 static struct Scsi_Host *
1784 ibmmca_register(Scsi_Host_Template * scsi_template, int port, int id,
1785 int adaptertype, char *hostname)
1786 {
1787 struct Scsi_Host *shpnt;
1788 int i, j;
1789 unsigned int ctrl;
1790
1791 /* check I/O region */
1792 if (check_region(port, IM_N_IO_PORT)) {
1793 printk("IBM MCA SCSI: Unable to get I/O region 0x%x-0x%x (%d ports).\n",
1794 port, port + IM_N_IO_PORT - 1, IM_N_IO_PORT);
1795 return NULL;
1796 }
1797
1798 /* register host */
1799 shpnt = scsi_register(scsi_template, sizeof(struct ibmmca_hostdata));
1800 if (!shpnt) {
1801 printk("IBM MCA SCSI: Unable to register host.\n");
1802 return NULL;
1803 }
1804
1805 /* request I/O region */
1806 request_region(port, IM_N_IO_PORT, hostname);
1807 hosts[found] = shpnt; /* add new found hostadapter to the list */
1808 special(found) = adaptertype; /* important assignment or else crash! */
1809 subsystem_connector_size(found) = 0; /* preset slot-size */
1810 shpnt->irq = IM_IRQ; /* assign necessary stuff for the adapter */
1811 shpnt->io_port = port;
1812 shpnt->n_io_port = IM_N_IO_PORT;
1813 shpnt->this_id = id;
1814 shpnt->max_id = 8; /* 8 PUNs are default */
1815 /* now, the SCSI-subsystem is connected to Linux */
1816
1817 ctrl = (unsigned int)(inb(IM_CTR_REG(found))); /* get control-register status */
1818 #ifdef IM_DEBUG_PROBE
1819 printk("IBM MCA SCSI: Control Register contents: %x, status: %x\n",
1820 ctrl,inb(IM_STAT_REG(found)));
1821 printk("IBM MCA SCSI: This adapters' POS-registers: ");
1822 for (i=0;i<8;i++)
1823 printk("%x ",pos[i]);
1824 printk("\n");
1825 #endif
1826 reset_status(found) = IM_RESET_NOT_IN_PROGRESS;
1827
1828 for (i = 0; i < 16; i++) /* reset the tables */
1829 for (j = 0; j < 8; j++)
1830 get_ldn(found)[i][j] = MAX_LOG_DEV;
1831
1832 /* check which logical devices exist */
1833 /* after this line, local interrupting is possible: */
1834 local_checking_phase_flag(found) = 1;
1835 check_devices(found,adaptertype); /* call by value, using the global variable hosts*/
1836 local_checking_phase_flag(found) = 0;
1837 found++; /* now increase index to be prepared for next found subsystem */
1838 /* an ibm mca subsystem has been detected */
1839 return shpnt;
1840 }
1841
1842 int ibmmca_command (Scsi_Cmnd * cmd)
1843 {
1844 ibmmca_queuecommand (cmd, internal_done);
1845 cmd->SCp.Status = 0;
1846 while (!cmd->SCp.Status) barrier ();
1847 return cmd->result;
1848 }
1849
1850 int ibmmca_release(struct Scsi_Host *shpnt)
1851 {
1852 release_region(shpnt->io_port, shpnt->n_io_port);
1853 if (!(--found)) free_irq(shpnt->irq, hosts);
1854 return 0;
1855 }
1856
1857 /* The following routine is the SCSI command queue for the midlevel driver */
1858 int ibmmca_queuecommand (Scsi_Cmnd * cmd, void (*done) (Scsi_Cmnd *))
1859 {
1860 unsigned int ldn;
1861 unsigned int scsi_cmd;
1862 struct im_scb *scb;
1863 struct Scsi_Host *shpnt;
1864 int current_ldn;
1865 int id,lun;
1866 int target;
1867 int host_index;
1868 int max_pun;
1869 int i;
1870 struct scatterlist *sl;
1871
1872 shpnt = cmd->host;
1873 /* search for the right hostadapter */
1874 for (host_index = 0; hosts[host_index] && hosts[host_index]->host_no != shpnt->host_no; host_index++);
1875
1876 if (!hosts[host_index]) { /* invalid hostadapter descriptor address */
1877 cmd->result = DID_NO_CONNECT << 16;
1878 if (done) done (cmd);
1879 return 0;
1880 }
1881 max_pun = subsystem_maxid(host_index);
1882 if (ibm_ansi_order) {
1883 target = max_pun - 1 - cmd->target;
1884 if ((target <= subsystem_pun(host_index))&&(cmd->target <= subsystem_pun(host_index)))
1885 target--;
1886 else if ((target >= subsystem_pun(host_index))&&(cmd->target >= subsystem_pun(host_index)))
1887 target++;
1888 } else
1889 target = cmd->target;
1890
1891 /* if (target,lun) is NO LUN or not existing at all, return error */
1892 if ((get_scsi(host_index)[target][cmd->lun] == TYPE_NO_LUN)||
1893 (get_scsi(host_index)[target][cmd->lun] == TYPE_NO_DEVICE)) {
1894 cmd->result = DID_NO_CONNECT << 16;
1895 if (done) done (cmd);
1896 return 0;
1897 }
1898
1899 /*if (target,lun) unassigned, do further checks... */
1900 ldn = get_ldn(host_index)[target][cmd->lun];
1901 if (ldn >= MAX_LOG_DEV) { /* on invalid ldn do special stuff */
1902 if (ldn > MAX_LOG_DEV) { /* dynamical remapping if ldn unassigned */
1903 current_ldn = next_ldn(host_index); /* stop-value for one circle */
1904 while (ld(host_index)[next_ldn(host_index)].cmd) { /* search for a occupied, but not in */
1905 /* command-processing ldn. */
1906 next_ldn(host_index)++;
1907 if (next_ldn(host_index)>=MAX_LOG_DEV)
1908 next_ldn(host_index) = 7;
1909 if (current_ldn == next_ldn(host_index)) { /* One circle done ? */
1910 /* no non-processing ldn found */
1911 printk("IBM MCA SCSI: Cannot assign SCSI-device dynamically!\n" \
1912 " On ldn 7-14 SCSI-commands everywhere in progress.\n" \
1913 " Reporting DID_NO_CONNECT for device (%d,%d).\n",
1914 target, cmd->lun);
1915 cmd->result = DID_NO_CONNECT << 16;/* return no connect*/
1916 if (done) done (cmd);
1917 return 0;
1918 }
1919 }
1920
1921 /* unmap non-processing ldn */
1922 for (id=0; id<max_pun; id ++)
1923 for (lun=0; lun<8; lun++) {
1924 if (get_ldn(host_index)[id][lun] == next_ldn(host_index)) {
1925 get_ldn(host_index)[id][lun] = TYPE_NO_DEVICE;
1926 get_scsi(host_index)[id][lun] = TYPE_NO_DEVICE;
1927 /* unmap entry */
1928 }
1929 }
1930 /* set reduced interrupt_handler-mode for checking */
1931 local_checking_phase_flag(host_index) = 1;
1932 /* map found ldn to pun,lun */
1933 get_ldn(host_index)[target][cmd->lun] = next_ldn(host_index);
1934 /* change ldn to the right value, that is now next_ldn */
1935 ldn = next_ldn(host_index);
1936 /* unassign all ldns (pun,lun,ldn does not matter for remove) */
1937 immediate_assign(host_index,0,0,0,REMOVE_LDN);
1938 /* set only LDN for remapped device */
1939 immediate_assign(host_index,target,cmd->lun,ldn,SET_LDN);
1940 /* get device information for ld[ldn] */
1941 if (device_exists (host_index, ldn,
1942 &ld(host_index)[ldn].block_length,
1943 &ld(host_index)[ldn].device_type)) {
1944 ld(host_index)[ldn].cmd = NULL; /* To prevent panic set 0, because
1945 devices that were not assigned,
1946 should have nothing in progress. */
1947 get_scsi(host_index)[target][cmd->lun] = ld(host_index)[ldn].device_type;
1948 /* increase assignment counters for statistics in /proc */
1949 IBM_DS(host_index).dynamical_assignments++;
1950 IBM_DS(host_index).ldn_assignments[ldn]++;
1951 } else
1952 /* panic here, because a device, found at boottime has
1953 vanished */
1954 panic("IBM MCA SCSI: ldn=0x%x, SCSI-device on (%d,%d) vanished!\n",
1955 ldn, target, cmd->lun);
1956 /* unassign again all ldns (pun,lun,ldn does not matter for remove) */
1957 immediate_assign(host_index,0,0,0,REMOVE_LDN);
1958 /* remap all ldns, as written in the pun/lun table */
1959 lun=0;
1960 #ifdef CONFIG_SCSI_MULTI_LUN
1961 for (lun=0; lun<8; lun++)
1962 #endif
1963 for (id=0; id<max_pun; id ++) {
1964 if (get_ldn(host_index)[id][lun] <= MAX_LOG_DEV)
1965 immediate_assign(host_index,id,lun,
1966 get_ldn(host_index)[id][lun],SET_LDN);
1967 }
1968 /* set back to normal interrupt_handling */
1969 local_checking_phase_flag(host_index) = 0;
1970 #ifdef IM_DEBUG_PROBE
1971 /* Information on syslog terminal */
1972 printk("IBM MCA SCSI: ldn=0x%x dynamically reassigned to (%d,%d).\n",
1973 ldn, target, cmd->lun);
1974 #endif
1975 /* increase next_ldn for next dynamical assignment */
1976 next_ldn(host_index)++;
1977 if (next_ldn(host_index)>=MAX_LOG_DEV)
1978 next_ldn(host_index) = 7;
1979 } else { /* wall against Linux accesses to the subsystem adapter */
1980 cmd->result = DID_BAD_TARGET << 16;
1981 if (done) done (cmd);
1982 return 0;
1983 }
1984 }
1985
1986 /*verify there is no command already in progress for this log dev */
1987 if (ld(host_index)[ldn].cmd)
1988 panic ("IBM MCA SCSI: cmd already in progress for this ldn.\n");
1989
1990 /*save done in cmd, and save cmd for the interrupt handler */
1991 cmd->scsi_done = done;
1992 ld(host_index)[ldn].cmd = cmd;
1993
1994 /*fill scb information independent of the scsi command */
1995 scb = &(ld(host_index)[ldn].scb);
1996 ld(host_index)[ldn].tsb.dev_status = 0;
1997 scb->enable = IM_REPORT_TSB_ONLY_ON_ERROR | IM_RETRY_ENABLE;
1998 scb->tsb_adr = virt_to_bus(&(ld(host_index)[ldn].tsb));
1999 scsi_cmd = cmd->cmnd[0];
2000
2001 if (cmd->use_sg) {
2002 i = cmd->use_sg;
2003 sl = (struct scatterlist *)(cmd->request_buffer);
2004 if (i > 16)
2005 panic ("IBM MCA SCSI: scatter-gather list too long.\n");
2006 while (--i >= 0) {
2007 ld(host_index)[ldn].sge[i].address = (void *)(virt_to_bus(sl[i].address));
2008 ld(host_index)[ldn].sge[i].byte_length = sl[i].length;
2009 }
2010 scb->enable |= IM_POINTER_TO_LIST;
2011 scb->sys_buf_adr = virt_to_bus(&(ld(host_index)[ldn].sge[0]));
2012 scb->sys_buf_length = cmd->use_sg * sizeof (struct im_sge);
2013 } else {
2014 scb->sys_buf_adr = virt_to_bus(cmd->request_buffer);
2015 /* recent Linux midlevel SCSI places 1024 byte for inquiry
2016 * command. Far too much for old PS/2 hardware. */
2017 switch (scsi_cmd) {
2018 /* avoid command errors by setting bufferlengths to
2019 * ANSI-standard. Beware of forcing it to 255,
2020 * this could SEGV the kernel!!! */
2021 case INQUIRY:
2022 case REQUEST_SENSE:
2023 case MODE_SENSE:
2024 case MODE_SELECT:
2025 if (cmd->request_bufflen > 255) scb->sys_buf_length = 255;
2026 else scb->sys_buf_length = cmd->request_bufflen;
2027 break;
2028 case TEST_UNIT_READY:
2029 scb->sys_buf_length = 0;
2030 break;
2031 default:
2032 scb->sys_buf_length = cmd->request_bufflen;
2033 break;
2034 }
2035 }
2036 /*fill scb information dependent on scsi command */
2037
2038 #ifdef IM_DEBUG_CMD
2039 printk("issue scsi cmd=%02x to ldn=%d\n", scsi_cmd, ldn);
2040 #endif
2041
2042 /* for specific device-type debugging: */
2043 #ifdef IM_DEBUG_CMD_SPEC_DEV
2044 if (ld(host_index)[ldn].device_type==IM_DEBUG_CMD_DEVICE)
2045 printk("(SCSI-device-type=0x%x) issue scsi cmd=%02x to ldn=%d\n",
2046 ld(host_index)[ldn].device_type, scsi_cmd, ldn);
2047 #endif
2048
2049 /* for possible panics store current command */
2050 last_scsi_command(host_index)[ldn] = scsi_cmd;
2051 last_scsi_type(host_index)[ldn] = IM_SCB;
2052 /* update statistical info */
2053 IBM_DS(host_index).total_accesses++;
2054 IBM_DS(host_index).ldn_access[ldn]++;
2055
2056 switch (scsi_cmd) {
2057 case READ_6:
2058 case WRITE_6:
2059 case READ_10:
2060 case WRITE_10:
2061 case READ_12:
2062 case WRITE_12:
2063 /* Distinguish between disk and other devices. Only disks (that are the
2064 most frequently accessed devices) should be supported by the
2065 IBM-SCSI-Subsystem commands. */
2066 switch (ld(host_index)[ldn].device_type) {
2067 case TYPE_DISK: /* for harddisks enter here ... */
2068 case TYPE_MOD: /* ... try it also for MO-drives (send flames as */
2069 /* you like, if this won't work.) */
2070 if (scsi_cmd == READ_6 || scsi_cmd == READ_10 || scsi_cmd == READ_12) {
2071 /* read command preparations */
2072 scb->enable |= IM_READ_CONTROL;
2073 IBM_DS(host_index).ldn_read_access[ldn]++; /* increase READ-access on ldn stat. */
2074 scb->command = IM_READ_DATA_CMD | IM_NO_DISCONNECT;
2075 } else { /* write command preparations */
2076 IBM_DS(host_index).ldn_write_access[ldn]++; /* increase write-count on ldn stat.*/
2077 scb->command = IM_WRITE_DATA_CMD | IM_NO_DISCONNECT;
2078 }
2079 if (scsi_cmd == READ_6 || scsi_cmd == WRITE_6) {
2080 scb->u1.log_blk_adr = (((unsigned) cmd->cmnd[3]) << 0) |
2081 (((unsigned) cmd->cmnd[2]) << 8) |
2082 ((((unsigned) cmd->cmnd[1]) & 0x1f) << 16);
2083 scb->u2.blk.count = (unsigned) cmd->cmnd[4];
2084 } else {
2085 scb->u1.log_blk_adr = (((unsigned) cmd->cmnd[5]) << 0) |
2086 (((unsigned) cmd->cmnd[4]) << 8) |
2087 (((unsigned) cmd->cmnd[3]) << 16) |
2088 (((unsigned) cmd->cmnd[2]) << 24);
2089 scb->u2.blk.count = (((unsigned) cmd->cmnd[8]) << 0) |
2090 (((unsigned) cmd->cmnd[7]) << 8);
2091 }
2092 last_scsi_logical_block(host_index)[ldn] = scb->u1.log_blk_adr;
2093 last_scsi_blockcount(host_index)[ldn] = scb->u2.blk.count;
2094 scb->u2.blk.length = ld(host_index)[ldn].block_length;
2095 break;
2096 /* for other devices, enter here. Other types are not known by
2097 Linux! TYPE_NO_LUN is forbidden as valid device. */
2098 case TYPE_ROM:
2099 case TYPE_TAPE:
2100 case TYPE_PROCESSOR:
2101 case TYPE_WORM:
2102 case TYPE_SCANNER:
2103 case TYPE_MEDIUM_CHANGER:
2104 /* If there is a sequential-device, IBM recommends to use
2105 IM_OTHER_SCSI_CMD_CMD instead of subsystem READ/WRITE.
2106 This includes CD-ROM devices, too, due to the partial sequential
2107 read capabilities. */
2108 scb->command = IM_OTHER_SCSI_CMD_CMD;
2109 if (scsi_cmd == READ_6 || scsi_cmd == READ_10 || scsi_cmd == READ_12)
2110 /* enable READ */
2111 scb->enable |= IM_READ_CONTROL;
2112 scb->enable |= IM_BYPASS_BUFFER;
2113 scb->u1.scsi_cmd_length = cmd->cmd_len;
2114 memcpy (scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len);
2115 last_scsi_type(host_index)[ldn] = IM_LONG_SCB;
2116 /* Read/write on this non-disk devices is also displayworthy,
2117 so flash-up the LED/display. */
2118 break;
2119 }
2120 break;
2121 case INQUIRY:
2122 IBM_DS(host_index).ldn_inquiry_access[ldn]++;
2123 scb->command = IM_DEVICE_INQUIRY_CMD;
2124 scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER;
2125 scb->u1.log_blk_adr = 0;
2126 break;
2127 case TEST_UNIT_READY:
2128 scb->command = IM_OTHER_SCSI_CMD_CMD;
2129 scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER;
2130 scb->u1.log_blk_adr = 0;
2131 scb->u1.scsi_cmd_length = 6;
2132 memcpy (scb->u2.scsi_command, cmd->cmnd, 6);
2133 last_scsi_type(host_index)[ldn] = IM_LONG_SCB;
2134 break;
2135 case READ_CAPACITY:
2136 /* the length of system memory buffer must be exactly 8 bytes */
2137 scb->command = IM_READ_CAPACITY_CMD;
2138 scb->enable |= IM_READ_CONTROL | IM_BYPASS_BUFFER;
2139 if (scb->sys_buf_length > 8) scb->sys_buf_length = 8;
2140 break;
2141 /* Commands that need read-only-mode (system <- device): */
2142 case REQUEST_SENSE:
2143 scb->command = IM_REQUEST_SENSE_CMD;
2144 scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER;
2145 break;
2146 /* Commands that need write-only-mode (system -> device): */
2147 case MODE_SELECT:
2148 case MODE_SELECT_10:
2149 IBM_DS(host_index).ldn_modeselect_access[ldn]++;
2150 scb->command = IM_OTHER_SCSI_CMD_CMD;
2151 scb->enable |= IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER; /*Select needs WRITE-enabled*/
2152 scb->u1.scsi_cmd_length = cmd->cmd_len;
2153 memcpy (scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len);
2154 last_scsi_type(host_index)[ldn] = IM_LONG_SCB;
2155 break;
2156 /* For other commands, read-only is useful. Most other commands are
2157 running without an input-data-block. */
2158 default:
2159 scb->command = IM_OTHER_SCSI_CMD_CMD;
2160 scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER;
2161 scb->u1.scsi_cmd_length = cmd->cmd_len;
2162 memcpy (scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len);
2163 last_scsi_type(host_index)[ldn] = IM_LONG_SCB;
2164 break;
2165 }
2166 /*issue scb command, and return */
2167 if (++disk_rw_in_progress == 1)
2168 PS2_DISK_LED_ON (shpnt->host_no, target);
2169
2170 if (last_scsi_type(host_index)[ldn] == IM_LONG_SCB) {
2171 issue_cmd (host_index, virt_to_bus(scb), IM_LONG_SCB | ldn);
2172 IBM_DS(host_index).long_scbs++;
2173 } else {
2174 issue_cmd (host_index, virt_to_bus(scb), IM_SCB | ldn);
2175 IBM_DS(host_index).scbs++;
2176 }
2177 return 0;
2178 }
2179
2180 int ibmmca_abort (Scsi_Cmnd * cmd)
2181 {
2182 /* Abort does not work, as the adapter never generates an interrupt on
2183 * whatever situation is simulated, even when really pending commands
2184 * are running on the adapters' hardware ! */
2185
2186 struct Scsi_Host *shpnt;
2187 unsigned int ldn;
2188 void (*saved_done) (Scsi_Cmnd *);
2189 int target;
2190 int host_index;
2191 int max_pun;
2192 static unsigned long flags;
2193 unsigned long imm_command;
2194
2195 #ifdef IM_DEBUG_PROBE
2196 printk("IBM MCA SCSI: Abort subroutine called...\n");
2197 #endif
2198 IBMLOCK
2199 shpnt = cmd->host;
2200 /* search for the right hostadapter */
2201 for (host_index = 0; hosts[host_index] && hosts[host_index]->host_no != shpnt->host_no; host_index++);
2202
2203 if (!hosts[host_index]) { /* invalid hostadapter descriptor address */
2204 cmd->result = DID_NO_CONNECT << 16;
2205 if (cmd->scsi_done) (cmd->scsi_done) (cmd);
2206 shpnt = cmd->host;
2207 IBMUNLOCK
2208 #ifdef IM_DEBUG_PROBE
2209 printk("IBM MCA SCSI: Abort adapter selection failed!\n");
2210 #endif
2211 return SCSI_ABORT_SNOOZE;
2212 }
2213 max_pun = subsystem_maxid(host_index);
2214 if (ibm_ansi_order) {
2215 target = max_pun - 1 - cmd->target;
2216 if ((target <= subsystem_pun(host_index))&&(cmd->target <= subsystem_pun(host_index)))
2217 target--;
2218 else if ((target >= subsystem_pun(host_index))&&(cmd->target >= subsystem_pun(host_index)))
2219 target++;
2220 } else
2221 target = cmd->target;
2222
2223 /* get logical device number, and disable system interrupts */
2224 printk ("IBM MCA SCSI: Sending abort to device pun=%d, lun=%d.\n",
2225 target, cmd->lun);
2226 ldn = get_ldn(host_index)[target][cmd->lun];
2227
2228 /*if cmd for this ldn has already finished, no need to abort */
2229 if (!ld(host_index)[ldn].cmd) {
2230 IBMUNLOCK
2231 return SCSI_ABORT_NOT_RUNNING;
2232 }
2233
2234 /* Clear ld.cmd, save done function, install internal done,
2235 * send abort immediate command (this enables sys. interrupts),
2236 * and wait until the interrupt arrives.
2237 */
2238 saved_done = cmd->scsi_done;
2239 cmd->scsi_done = internal_done;
2240 cmd->SCp.Status = 0;
2241 last_scsi_command(host_index)[ldn] = IM_ABORT_IMM_CMD;
2242 last_scsi_type(host_index)[ldn] = IM_IMM_CMD;
2243 imm_command = inl(IM_CMD_REG(host_index));
2244 imm_command &= (unsigned long)(0xffff0000); /* mask reserved stuff */
2245 imm_command |= (unsigned long)(IM_ABORT_IMM_CMD);
2246 /* must wait for attention reg not busy */
2247 while (1) {
2248 if (!(inb (IM_STAT_REG(host_index)) & IM_BUSY))
2249 break;
2250 IBMUNLOCK
2251 IBMLOCK
2252 }
2253 /* write registers and enable system interrupts */
2254 outl (imm_command, IM_CMD_REG(host_index));
2255 outb (IM_IMM_CMD | ldn, IM_ATTN_REG(host_index));
2256 IBMUNLOCK
2257 #ifdef IM_DEBUG_PROBE
2258 printk("IBM MCA SCSI: Abort queued to adapter...\n");
2259 #endif
2260 while (!cmd->SCp.Status) barrier ();
2261 cmd->scsi_done = saved_done;
2262 #ifdef IM_DEBUG_PROBE
2263 printk("IBM MCA SCSI: Abort returned with adapter response...\n");
2264 #endif
2265
2266 /*if abort went well, call saved done, then return success or error */
2267 if (cmd->result == (DID_ABORT << 16)) {
2268 IBMLOCK
2269 cmd->result |= DID_ABORT << 16;
2270 if (cmd->scsi_done) (cmd->scsi_done) (cmd);
2271 ld(host_index)[ldn].cmd = NULL;
2272 IBMUNLOCK
2273 #ifdef IM_DEBUG_PROBE
2274 printk("IBM MCA SCSI: Abort finished with success.\n");
2275 #endif
2276 return SCSI_ABORT_SUCCESS;
2277 } else {
2278 IBMLOCK
2279 cmd->result |= DID_NO_CONNECT << 16;
2280 if (cmd->scsi_done) (cmd->scsi_done) (cmd);
2281 ld(host_index)[ldn].cmd = NULL;
2282 IBMUNLOCK
2283 #ifdef IM_DEBUG_PROBE
2284 printk("IBM MCA SCSI: Abort failed.\n");
2285 #endif
2286 return SCSI_ABORT_ERROR;
2287 }
2288 }
2289
2290 int ibmmca_reset (Scsi_Cmnd * cmd, unsigned int reset_flags)
2291 {
2292 struct Scsi_Host *shpnt;
2293 Scsi_Cmnd *cmd_aid;
2294 int ticks,i;
2295 int host_index;
2296 static unsigned long flags;
2297 unsigned long imm_command;
2298
2299 if (cmd == NULL) {
2300 printk("IBM MCA SCSI: Reset called with NULL-command!\n");
2301 return(SCSI_RESET_SNOOZE);
2302 }
2303 IBMLOCK
2304 ticks = IM_RESET_DELAY*HZ;
2305 shpnt = cmd->host;
2306 /* search for the right hostadapter */
2307 for (host_index = 0; hosts[host_index] && hosts[host_index]->host_no != shpnt->host_no; host_index++);
2308
2309 if (!hosts[host_index]) /* invalid hostadapter descriptor address */
2310 return SCSI_ABORT_SNOOZE;
2311
2312 if (local_checking_phase_flag(host_index)) {
2313 printk("IBM MCA SCSI: unable to reset while checking devices.\n");
2314 IBMUNLOCK
2315 return SCSI_RESET_SNOOZE;
2316 }
2317
2318 /* issue reset immediate command to subsystem, and wait for interrupt */
2319 printk("IBM MCA SCSI: resetting all devices.\n");
2320 reset_status(host_index) = IM_RESET_IN_PROGRESS;
2321 last_scsi_command(host_index)[0xf] = IM_RESET_IMM_CMD;
2322 last_scsi_type(host_index)[0xf] = IM_IMM_CMD;
2323 imm_command = inl(IM_CMD_REG(host_index));
2324 imm_command &= (unsigned long)(0xffff0000); /* mask reserved stuff */
2325 imm_command |= (unsigned long)(IM_RESET_IMM_CMD);
2326 /* must wait for attention reg not busy */
2327 while (1) {
2328 if (!(inb (IM_STAT_REG(host_index)) & IM_BUSY))
2329 break;
2330 IBMUNLOCK
2331 IBMLOCK
2332 }
2333 /*write registers and enable system interrupts */
2334 outl (imm_command, IM_CMD_REG(host_index));
2335 outb (IM_IMM_CMD | 0xf, IM_ATTN_REG(host_index));
2336 /* wait for interrupt finished or intr_stat register to be set, as the
2337 * interrupt will not be executed, while we are in here! */
2338 while (reset_status(host_index) == IM_RESET_IN_PROGRESS && --ticks
2339 && ((inb(IM_INTR_REG(host_index)) & 0x8f)!=0x8f)) {
2340 udelay((1+999/HZ)*1000);
2341 barrier();
2342 }
2343 /* if reset did not complete, just return an error*/
2344 if (!ticks) {
2345 printk("IBM MCA SCSI: reset did not complete within %d seconds.\n",
2346 IM_RESET_DELAY);
2347 reset_status(host_index) = IM_RESET_FINISHED_FAIL;
2348 IBMUNLOCK
2349 return SCSI_RESET_ERROR;
2350 }
2351
2352 if ((inb(IM_INTR_REG(host_index)) & 0x8f)==0x8f) {
2353 /* analysis done by this routine and not by the intr-routine */
2354 if (inb(IM_INTR_REG(host_index))==0xaf)
2355 reset_status(host_index) = IM_RESET_FINISHED_OK_NO_INT;
2356 else if (inb(IM_INTR_REG(host_index))==0xcf)
2357 reset_status(host_index) = IM_RESET_FINISHED_FAIL;
2358 else /* failed, 4get it */
2359 reset_status(host_index) = IM_RESET_NOT_IN_PROGRESS_NO_INT;
2360 outb (IM_EOI | 0xf, IM_ATTN_REG(host_index));
2361 }
2362
2363 /* if reset failed, just return an error */
2364 if (reset_status(host_index) == IM_RESET_FINISHED_FAIL) {
2365 printk("IBM MCA SCSI: reset failed.\n");
2366 IBMUNLOCK
2367 return SCSI_RESET_ERROR;
2368 }
2369
2370 /* so reset finished ok - call outstanding done's, and return success */
2371 printk ("IBM MCA SCSI: Reset successfully completed.\n");
2372 IBMUNLOCK
2373 for (i = 0; i < MAX_LOG_DEV; i++) {
2374 cmd_aid = ld(host_index)[i].cmd;
2375 if (cmd_aid && cmd_aid->scsi_done) {
2376 ld(host_index)[i].cmd = NULL;
2377 cmd_aid->result = DID_RESET << 16;
2378 }
2379 }
2380 if (reset_flags & SCSI_RESET_SUGGEST_HOST_RESET)
2381 return (SCSI_RESET_SUCCESS | SCSI_RESET_HOST_RESET);
2382 else if (reset_flags & SCSI_RESET_SUGGEST_BUS_RESET)
2383 return (SCSI_RESET_SUCCESS | SCSI_RESET_BUS_RESET);
2384 else
2385 return SCSI_RESET_SUCCESS;
2386 }
2387
2388 int ibmmca_biosparam (Disk * disk, kdev_t dev, int *info)
2389 {
2390 info[0] = 64;
2391 info[1] = 32;
2392 info[2] = disk->capacity / (info[0] * info[1]);
2393 if (info[2] >= 1024) {
2394 info[0] = 128;
2395 info[1] = 63;
2396 info[2] = disk->capacity / (info[0] * info[1]);
2397 if (info[2] >= 1024) {
2398 info[0] = 255;
2399 info[1] = 63;
2400 info[2] = disk->capacity / (info[0] * info[1]);
2401 if (info[2] >= 1024)
2402 info[2] = 1023;
2403 }
2404 }
2405 return 0;
2406 }
2407
2408 /* calculate percentage of total accesses on a ldn */
2409 static int ldn_access_load(int host_index, int ldn)
2410 {
2411 if (IBM_DS(host_index).total_accesses == 0) return (0);
2412 if (IBM_DS(host_index).ldn_access[ldn] == 0) return (0);
2413 return (IBM_DS(host_index).ldn_access[ldn] * 100) / IBM_DS(host_index).total_accesses;
2414 }
2415
2416 /* calculate total amount of r/w-accesses */
2417 static int ldn_access_total_read_write(int host_index)
2418 {
2419 int a;
2420 int i;
2421
2422 a = 0;
2423 for (i=0; i<=MAX_LOG_DEV; i++)
2424 a+=IBM_DS(host_index).ldn_read_access[i]+IBM_DS(host_index).ldn_write_access[i];
2425 return(a);
2426 }
2427
2428 static int ldn_access_total_inquiry(int host_index)
2429 {
2430 int a;
2431 int i;
2432
2433 a = 0;
2434 for (i=0; i<=MAX_LOG_DEV; i++)
2435 a+=IBM_DS(host_index).ldn_inquiry_access[i];
2436 return(a);
2437 }
2438
2439 static int ldn_access_total_modeselect(int host_index)
2440 {
2441 int a;
2442 int i;
2443
2444 a = 0;
2445 for (i=0; i<=MAX_LOG_DEV; i++)
2446 a+=IBM_DS(host_index).ldn_modeselect_access[i];
2447 return(a);
2448 }
2449
2450 /* routine to display info in the proc-fs-structure (a deluxe feature) */
2451 int ibmmca_proc_info (char *buffer, char **start, off_t offset, int length,
2452 int hostno, int inout)
2453 {
2454 int len=0;
2455 int i,id,lun,host_index;
2456 struct Scsi_Host *shpnt;
2457 unsigned long flags;
2458 int max_pun;
2459
2460 IBMLOCK
2461 for (i = 0; hosts[i] && hosts[i]->host_no != hostno; i++);
2462 shpnt = hosts[i];
2463 host_index = i;
2464 if (!shpnt) {
2465 len += sprintf(buffer+len, "\nIBM MCA SCSI: Can't find adapter for host number %d\n", hostno);
2466 return len;
2467 }
2468 max_pun = subsystem_maxid(host_index);
2469
2470 len += sprintf(buffer+len, "\n IBM-SCSI-Subsystem-Linux-Driver, Version %s\n\n\n",
2471 IBMMCA_SCSI_DRIVER_VERSION);
2472 len += sprintf(buffer+len, " SCSI Access-Statistics:\n");
2473 len += sprintf(buffer+len, " Device Scanning Order....: %s\n",
2474 (ibm_ansi_order) ? "IBM/ANSI" : "New Industry Standard");
2475 #ifdef CONFIG_SCSI_MULTI_LUN
2476 len += sprintf(buffer+len, " Multiple LUN probing.....: Yes\n");
2477 #else
2478 len += sprintf(buffer+len, " Multiple LUN probing.....: No\n");
2479 #endif
2480 len += sprintf(buffer+len, " This Hostnumber..........: %d\n",
2481 hostno);
2482 len += sprintf(buffer+len, " Base I/O-Port............: 0x%x\n",
2483 (unsigned int)(IM_CMD_REG(host_index)));
2484 len += sprintf(buffer+len, " (Shared) IRQ.............: %d\n",
2485 IM_IRQ);
2486 len += sprintf(buffer+len, " Total Interrupts.........: %d\n",
2487 IBM_DS(host_index).total_interrupts);
2488 len += sprintf(buffer+len, " Total SCSI Accesses......: %d\n",
2489 IBM_DS(host_index).total_accesses);
2490 len += sprintf(buffer+len, " Total short SCBs.........: %d\n",
2491 IBM_DS(host_index).scbs);
2492 len += sprintf(buffer+len, " Total long SCBs..........: %d\n",
2493 IBM_DS(host_index).long_scbs);
2494 len += sprintf(buffer+len, " Total SCSI READ/WRITE..: %d\n",
2495 ldn_access_total_read_write(host_index));
2496 len += sprintf(buffer+len, " Total SCSI Inquiries...: %d\n",
2497 ldn_access_total_inquiry(host_index));
2498 len += sprintf(buffer+len, " Total SCSI Modeselects.: %d\n",
2499 ldn_access_total_modeselect(host_index));
2500 len += sprintf(buffer+len, " Total SCSI other cmds..: %d\n",
2501 IBM_DS(host_index).total_accesses - ldn_access_total_read_write(host_index)
2502 - ldn_access_total_modeselect(host_index)
2503 - ldn_access_total_inquiry(host_index));
2504 len += sprintf(buffer+len, " Total SCSI command fails.: %d\n\n",
2505 IBM_DS(host_index).total_errors);
2506 len += sprintf(buffer+len, " Logical-Device-Number (LDN) Access-Statistics:\n");
2507 len += sprintf(buffer+len, " LDN | Accesses [%%] | READ | WRITE | ASSIGNMENTS\n");
2508 len += sprintf(buffer+len, " -----|--------------|-----------|-----------|--------------\n");
2509 for (i=0; i<=MAX_LOG_DEV; i++)
2510 len += sprintf(buffer+len, " %2X | %3d | %8d | %8d | %8d\n",
2511 i, ldn_access_load(host_index, i), IBM_DS(host_index).ldn_read_access[i],
2512 IBM_DS(host_index).ldn_write_access[i], IBM_DS(host_index).ldn_assignments[i]);
2513 len += sprintf(buffer+len, " -----------------------------------------------------------\n\n");
2514 len += sprintf(buffer+len, " Dynamical-LDN-Assignment-Statistics:\n");
2515 len += sprintf(buffer+len, " Number of physical SCSI-devices..: %d (+ Adapter)\n",
2516 IBM_DS(host_index).total_scsi_devices);
2517 len += sprintf(buffer+len, " Dynamical Assignment necessary...: %s\n",
2518 IBM_DS(host_index).dyn_flag ? "Yes" : "No ");
2519 len += sprintf(buffer+len, " Next LDN to be assigned..........: 0x%x\n",
2520 next_ldn(host_index));
2521 len += sprintf(buffer+len, " Dynamical assignments done yet...: %d\n",
2522 IBM_DS(host_index).dynamical_assignments);
2523 len += sprintf(buffer+len, "\n Current SCSI-Device-Mapping:\n");
2524 len += sprintf(buffer+len, " Physical SCSI-Device Map Logical SCSI-Device Map\n");
2525 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");
2526 for (id=0; id<max_pun; id++) {
2527 len += sprintf(buffer+len, " %2d ",id);
2528 for (lun=0; lun<8; lun++)
2529 len += sprintf(buffer+len,"%2s ",ti_p(get_scsi(host_index)[id][lun]));
2530 len += sprintf(buffer+len, " %2d ",id);
2531 for (lun=0; lun<8; lun++)
2532 len += sprintf(buffer+len,"%2s ",ti_l(get_ldn(host_index)[id][lun]));
2533 len += sprintf(buffer+len,"\n");
2534 }
2535
2536 len += sprintf(buffer+len, "(A = IBM-Subsystem, D = Harddisk, T = Tapedrive, P = Processor, W = WORM,\n");
2537 len += sprintf(buffer+len, " R = CD-ROM, S = Scanner, M = MO-Drive, C = Medium-Changer, + = unprovided LUN,\n");
2538 len += sprintf(buffer+len, " - = nothing found, nothing assigned or unprobed LUN)\n\n");
2539
2540 *start = buffer + offset;
2541 len -= offset;
2542 if (len > length) len = length;
2543 IBMUNLOCK
2544 return len;
2545 }
2546
2547 void ibmmca_scsi_setup (char *str, int *ints)
2548 {
2549 internal_ibmmca_scsi_setup (str, ints);
2550 }
2551
2552 static int option_setup(char *str)
2553 {
2554 int ints[IM_MAX_HOSTS];
2555 char *cur = str;
2556 int i = 1;
2557
2558 while (cur && isdigit(*cur) && i <= IM_MAX_HOSTS) {
2559 ints[i++] = simple_strtoul(cur, NULL, 0);
2560 if ((cur = strchr(cur,',')) != NULL) cur++;
2561 }
2562 ints[0] = i - 1;
2563 internal_ibmmca_scsi_setup(cur, ints);
2564 return 0;
2565 }
2566
2567 __setup("ibmmcascsi=", option_setup);
2568
2569 #ifdef MODULE
2570 /* Eventually this will go into an include file, but this will be later */
2571 Scsi_Host_Template driver_template = IBMMCA;
2572
2573 #include "scsi_module.c"
2574 #endif
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