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RT-AC66 3.0.0.4.374.130 core
[tomato.git] / release / src-rt-6.x / linux / linux-2.6 / drivers / scsi / ibmmca.c
blob0e57fb6964d5944c76a60e6f905fc46f38fa0272
1 /*
2 Low Level Linux Driver for the IBM Microchannel SCSI Subsystem for
3 Linux Kernel >= 2.4.0.
4 Copyright (c) 1995 Strom Systems, Inc. under the terms of the GNU
5 General Public License. Written by Martin Kolinek, December 1995.
6 Further development by: Chris Beauregard, Klaus Kudielka, Michael Lang
7 See the file Documentation/scsi/ibmmca.txt for a detailed description
8 of this driver, the commandline arguments and the history of its
9 development.
10 See the WWW-page: http://www.uni-mainz.de/~langm000/linux.html for latest
11 updates, info and ADF-files for adapters supported by this driver.
12
13 Alan Cox <alan@redhat.com>
14 Updated for Linux 2.5.45 to use the new error handler, cleaned up the
15 lock macros and did a few unavoidable locking tweaks, plus one locking
16 fix in the irq and completion path.
17
18 */
19
20 #include <linux/module.h>
21 #include <linux/kernel.h>
22 #include <linux/types.h>
23 #include <linux/ctype.h>
24 #include <linux/string.h>
25 #include <linux/interrupt.h>
26 #include <linux/ioport.h>
27 #include <linux/delay.h>
28 #include <linux/blkdev.h>
29 #include <linux/proc_fs.h>
30 #include <linux/stat.h>
31 #include <linux/mca.h>
32 #include <linux/spinlock.h>
33 #include <linux/init.h>
34 #include <linux/mca-legacy.h>
35
36 #include <asm/system.h>
37 #include <asm/io.h>
38
39 #include "scsi.h"
40 #include <scsi/scsi_host.h>
41 #include "ibmmca.h"
42
43 /* current version of this driver-source: */
44 #define IBMMCA_SCSI_DRIVER_VERSION "4.0b-ac"
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 static 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 module_param(boot_options, charp, 0);
447 module_param_array(io_port, int, NULL, 0);
448 module_param_array(scsi_id, int, NULL, 0);
449
450 #if 0 /* FIXME: No longer exist? --RR */
451 MODULE_PARM(display, "1i");
452 MODULE_PARM(adisplay, "1i");
453 MODULE_PARM(normal, "1i");
454 MODULE_PARM(ansi, "1i");
455 #endif
456
457 MODULE_LICENSE("GPL");
458 #endif
459 /*counter of concurrent disk read/writes, to turn on/off disk led */
460 static int disk_rw_in_progress = 0;
461
462 /* host information */
463 static int found = 0;
464 static struct Scsi_Host *hosts[IM_MAX_HOSTS + 1] = {
465 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
466 };
467 static unsigned int pos[8]; /* whole pos register-line for diagnosis */
468 /* Taking into account the additions, made by ZP Gu.
469 * This selects now the preset value from the configfile and
470 * offers the 'normal' commandline option to be accepted */
471 #ifdef CONFIG_IBMMCA_SCSI_ORDER_STANDARD
472 static char ibm_ansi_order = 1;
473 #else
474 static char ibm_ansi_order = 0;
475 #endif
476
477 static void issue_cmd(int, unsigned long, unsigned char);
478 static void internal_done(Scsi_Cmnd * cmd);
479 static void check_devices(int, int);
480 static int immediate_assign(int, unsigned int, unsigned int, unsigned int, unsigned int);
481 static int immediate_feature(int, unsigned int, unsigned int);
482 #ifdef CONFIG_IBMMCA_SCSI_DEV_RESET
483 static int immediate_reset(int, unsigned int);
484 #endif
485 static int device_inquiry(int, int);
486 static int read_capacity(int, int);
487 static int get_pos_info(int);
488 static char *ti_p(int);
489 static char *ti_l(int);
490 static char *ibmrate(unsigned int, int);
491 static int probe_display(int);
492 static int probe_bus_mode(int);
493 static int device_exists(int, int, int *, int *);
494 static struct Scsi_Host *ibmmca_register(struct scsi_host_template *, int, int, int, char *);
495 static int option_setup(char *);
496 /* local functions needed for proc_info */
497 static int ldn_access_load(int, int);
498 static int ldn_access_total_read_write(int);
499
500 static irqreturn_t interrupt_handler(int irq, void *dev_id)
501 {
502 int host_index, ihost_index;
503 unsigned int intr_reg;
504 unsigned int cmd_result;
505 unsigned int ldn;
506 Scsi_Cmnd *cmd;
507 int lastSCSI;
508 struct Scsi_Host *dev = dev_id;
509
510 spin_lock(dev->host_lock);
511 /* search for one adapter-response on shared interrupt */
512 for (host_index = 0; hosts[host_index] && !(inb(IM_STAT_REG(host_index)) & IM_INTR_REQUEST); host_index++);
513 /* return if some other device on this IRQ caused the interrupt */
514 if (!hosts[host_index]) {
515 spin_unlock(dev->host_lock);
516 return IRQ_NONE;
517 }
518
519 /* the reset-function already did all the job, even ints got
520 renabled on the subsystem, so just return */
521 if ((reset_status(host_index) == IM_RESET_NOT_IN_PROGRESS_NO_INT) || (reset_status(host_index) == IM_RESET_FINISHED_OK_NO_INT)) {
522 reset_status(host_index) = IM_RESET_NOT_IN_PROGRESS;
523 spin_unlock(dev->host_lock);
524 return IRQ_HANDLED;
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))
530 break;
531 cpu_relax();
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
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(KERN_ERR "IBM MCA SCSI: Fatal Subsystem ERROR!\n");
550 printk(KERN_ERR " Last cmd=0x%x, ena=%x, len=", lastSCSI, ld(ihost_index)[ldn].scb.enable);
551 if (ld(ihost_index)[ldn].cmd)
552 printk("%ld/%ld,", (long) (ld(ihost_index)[ldn].cmd->request_bufflen), (long) (ld(ihost_index)[ldn].scb.sys_buf_length));
553 else
554 printk("none,");
555 if (ld(ihost_index)[ldn].cmd)
556 printk("Blocksize=%d", ld(ihost_index)[ldn].scb.u2.blk.length);
557 else
558 printk("Blocksize=none");
559 printk(", host=0x%x, ldn=0x%x\n", ihost_index, ldn);
560 if (ld(ihost_index)[ldn].cmd) {
561 printk(KERN_ERR "Blockcount=%d/%d\n", last_scsi_blockcount(ihost_index)[ldn], ld(ihost_index)[ldn].scb.u2.blk.count);
562 printk(KERN_ERR "Logical block=%lx/%lx\n", last_scsi_logical_block(ihost_index)[ldn], ld(ihost_index)[ldn].scb.u1.log_blk_adr);
563 }
564 printk(KERN_ERR "Reason given: %s\n", (cmd_result == IM_ADAPTER_HW_FAILURE) ? "HARDWARE FAILURE" : (cmd_result == IM_SOFTWARE_SEQUENCING_ERROR) ? "SOFTWARE SEQUENCING ERROR" : (cmd_result == IM_CMD_ERROR) ? "COMMAND ERROR" : "UNKNOWN");
565 /* if errors appear, enter this section to give detailed info */
566 printk(KERN_ERR "IBM MCA SCSI: Subsystem Error-Status follows:\n");
567 printk(KERN_ERR " Command Type................: %x\n", last_scsi_type(ihost_index)[ldn]);
568 printk(KERN_ERR " Attention Register..........: %x\n", inb(IM_ATTN_REG(ihost_index)));
569 printk(KERN_ERR " Basic Control Register......: %x\n", inb(IM_CTR_REG(ihost_index)));
570 printk(KERN_ERR " Interrupt Status Register...: %x\n", intr_reg);
571 printk(KERN_ERR " Basic Status Register.......: %x\n", inb(IM_STAT_REG(ihost_index)));
572 if ((last_scsi_type(ihost_index)[ldn] == IM_SCB) || (last_scsi_type(ihost_index)[ldn] == IM_LONG_SCB)) {
573 printk(KERN_ERR " SCB-Command.................: %x\n", ld(ihost_index)[ldn].scb.command);
574 printk(KERN_ERR " SCB-Enable..................: %x\n", ld(ihost_index)[ldn].scb.enable);
575 printk(KERN_ERR " SCB-logical block address...: %lx\n", ld(ihost_index)[ldn].scb.u1.log_blk_adr);
576 printk(KERN_ERR " SCB-system buffer address...: %lx\n", ld(ihost_index)[ldn].scb.sys_buf_adr);
577 printk(KERN_ERR " SCB-system buffer length....: %lx\n", ld(ihost_index)[ldn].scb.sys_buf_length);
578 printk(KERN_ERR " SCB-tsb address.............: %lx\n", ld(ihost_index)[ldn].scb.tsb_adr);
579 printk(KERN_ERR " SCB-Chain address...........: %lx\n", ld(ihost_index)[ldn].scb.scb_chain_adr);
580 printk(KERN_ERR " SCB-block count.............: %x\n", ld(ihost_index)[ldn].scb.u2.blk.count);
581 printk(KERN_ERR " SCB-block length............: %x\n", ld(ihost_index)[ldn].scb.u2.blk.length);
582 }
583 printk(KERN_ERR " Send this report to the maintainer.\n");
584 panic("IBM MCA SCSI: Fatal error message from the subsystem (0x%X,0x%X)!\n", lastSCSI, cmd_result);
585 break;
586 }
587 } else {
588 /* The command error handling is made silent, but we tell the
589 * calling function, that there is a reported error from the
590 * adapter. */
591 switch (cmd_result) {
592 case IM_ADAPTER_HW_FAILURE:
593 case IM_SOFTWARE_SEQUENCING_ERROR:
594 case IM_CMD_ERROR:
595 global_command_error_excuse = CMD_FAIL;
596 break;
597 default:
598 global_command_error_excuse = 0;
599 break;
600 }
601 }
602 /* if no panic appeared, increase the interrupt-counter */
603 IBM_DS(ihost_index).total_interrupts++;
604 /*only for local checking phase */
605 if (local_checking_phase_flag(ihost_index)) {
606 stat_result(ihost_index) = cmd_result;
607 got_interrupt(ihost_index) = 1;
608 reset_status(ihost_index) = IM_RESET_FINISHED_OK;
609 last_scsi_command(ihost_index)[ldn] = NO_SCSI;
610 spin_unlock(dev->host_lock);
611 return IRQ_HANDLED;
612 }
613 /* handling of commands coming from upper level of scsi driver */
614 if (last_scsi_type(ihost_index)[ldn] == IM_IMM_CMD) {
615 /* verify ldn, and may handle rare reset immediate command */
616 if ((reset_status(ihost_index) == IM_RESET_IN_PROGRESS) && (last_scsi_command(ihost_index)[ldn] == IM_RESET_IMM_CMD)) {
617 if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE) {
618 disk_rw_in_progress = 0;
619 PS2_DISK_LED_OFF();
620 reset_status(ihost_index) = IM_RESET_FINISHED_FAIL;
621 } else {
622 /*reset disk led counter, turn off disk led */
623 disk_rw_in_progress = 0;
624 PS2_DISK_LED_OFF();
625 reset_status(ihost_index) = IM_RESET_FINISHED_OK;
626 }
627 stat_result(ihost_index) = cmd_result;
628 last_scsi_command(ihost_index)[ldn] = NO_SCSI;
629 last_scsi_type(ihost_index)[ldn] = 0;
630 spin_unlock(dev->host_lock);
631 return IRQ_HANDLED;
632 } else if (last_scsi_command(ihost_index)[ldn] == IM_ABORT_IMM_CMD) {
633 /* react on SCSI abort command */
634 #ifdef IM_DEBUG_PROBE
635 printk("IBM MCA SCSI: Interrupt from SCSI-abort.\n");
636 #endif
637 disk_rw_in_progress = 0;
638 PS2_DISK_LED_OFF();
639 cmd = ld(ihost_index)[ldn].cmd;
640 ld(ihost_index)[ldn].cmd = NULL;
641 if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE)
642 cmd->result = DID_NO_CONNECT << 16;
643 else
644 cmd->result = DID_ABORT << 16;
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 if (cmd->scsi_done)
649 (cmd->scsi_done) (cmd); /* should be the internal_done */
650 spin_unlock(dev->host_lock);
651 return IRQ_HANDLED;
652 } else {
653 disk_rw_in_progress = 0;
654 PS2_DISK_LED_OFF();
655 reset_status(ihost_index) = IM_RESET_FINISHED_OK;
656 stat_result(ihost_index) = cmd_result;
657 last_scsi_command(ihost_index)[ldn] = NO_SCSI;
658 spin_unlock(dev->host_lock);
659 return IRQ_HANDLED;
660 }
661 }
662 last_scsi_command(ihost_index)[ldn] = NO_SCSI;
663 last_scsi_type(ihost_index)[ldn] = 0;
664 cmd = ld(ihost_index)[ldn].cmd;
665 ld(ihost_index)[ldn].cmd = NULL;
666 #ifdef IM_DEBUG_TIMEOUT
667 if (cmd) {
668 if ((cmd->target == TIMEOUT_PUN) && (cmd->device->lun == TIMEOUT_LUN)) {
669 printk("IBM MCA SCSI: Ignoring interrupt from pun=%x, lun=%x.\n", cmd->target, cmd->device->lun);
670 return IRQ_HANDLED;
671 }
672 }
673 #endif
674 /*if no command structure, just return, else clear cmd */
675 if (!cmd)
676 {
677 spin_unlock(dev->host_lock);
678 return IRQ_HANDLED;
679 }
680
681 #ifdef IM_DEBUG_INT
682 printk("cmd=%02x ireg=%02x ds=%02x cs=%02x de=%02x ce=%02x\n", cmd->cmnd[0], intr_reg, ld(ihost_index)[ldn].tsb.dev_status, ld(ihost_index)[ldn].tsb.cmd_status, ld(ihost_index)[ldn].tsb.dev_error, ld(ihost_index)[ldn].tsb.cmd_error);
683 #endif
684 /*if this is end of media read/write, may turn off PS/2 disk led */
685 if ((ld(ihost_index)[ldn].device_type != TYPE_NO_LUN) && (ld(ihost_index)[ldn].device_type != TYPE_NO_DEVICE)) {
686 /* only access this, if there was a valid device addressed */
687 if (--disk_rw_in_progress == 0)
688 PS2_DISK_LED_OFF();
689 }
690
691 /* IBM describes the status-mask to be 0x1e, but this is not conform
692 * with SCSI-definition, I suppose, the reason for it is that IBM
693 * adapters do not support CMD_TERMINATED, TASK_SET_FULL and
694 * ACA_ACTIVE as returning statusbyte information. (ML) */
695 if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE) {
696 cmd->result = (unsigned char) (ld(ihost_index)[ldn].tsb.dev_status & 0x1e);
697 IBM_DS(ihost_index).total_errors++;
698 } else
699 cmd->result = 0;
700 /* write device status into cmd->result, and call done function */
701 if (lastSCSI == NO_SCSI) { /* unexpected interrupt :-( */
702 cmd->result |= DID_BAD_INTR << 16;
703 printk("IBM MCA SCSI: WARNING - Interrupt from non-pending SCSI-command!\n");
704 } else /* things went right :-) */
705 cmd->result |= DID_OK << 16;
706 if (cmd->scsi_done)
707 (cmd->scsi_done) (cmd);
708 spin_unlock(dev->host_lock);
709 return IRQ_HANDLED;
710 }
711
712 static void issue_cmd(int host_index, unsigned long cmd_reg, unsigned char attn_reg)
713 {
714 unsigned long flags;
715 /* must wait for attention reg not busy */
716 while (1) {
717 spin_lock_irqsave(hosts[host_index]->host_lock, flags);
718 if (!(inb(IM_STAT_REG(host_index)) & IM_BUSY))
719 break;
720 spin_unlock_irqrestore(hosts[host_index]->host_lock, flags);
721 }
722 /* write registers and enable system interrupts */
723 outl(cmd_reg, IM_CMD_REG(host_index));
724 outb(attn_reg, IM_ATTN_REG(host_index));
725 spin_unlock_irqrestore(hosts[host_index]->host_lock, flags);
726 }
727
728 static void internal_done(Scsi_Cmnd * cmd)
729 {
730 cmd->SCp.Status++;
731 return;
732 }
733
734 /* SCSI-SCB-command for device_inquiry */
735 static int device_inquiry(int host_index, int ldn)
736 {
737 int retr;
738 struct im_scb *scb;
739 struct im_tsb *tsb;
740 unsigned char *buf;
741
742 scb = &(ld(host_index)[ldn].scb);
743 tsb = &(ld(host_index)[ldn].tsb);
744 buf = (unsigned char *) (&(ld(host_index)[ldn].buf));
745 ld(host_index)[ldn].tsb.dev_status = 0; /* prepare statusblock */
746 for (retr = 0; retr < 3; retr++) {
747 /* fill scb with inquiry command */
748 scb->command = IM_DEVICE_INQUIRY_CMD | IM_NO_DISCONNECT;
749 scb->enable = IM_REPORT_TSB_ONLY_ON_ERROR | IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_RETRY_ENABLE | IM_BYPASS_BUFFER;
750 last_scsi_command(host_index)[ldn] = IM_DEVICE_INQUIRY_CMD;
751 last_scsi_type(host_index)[ldn] = IM_SCB;
752 scb->sys_buf_adr = isa_virt_to_bus(buf);
753 scb->sys_buf_length = 255; /* maximum bufferlength gives max info */
754 scb->tsb_adr = isa_virt_to_bus(tsb);
755 /* issue scb to passed ldn, and busy wait for interrupt */
756 got_interrupt(host_index) = 0;
757 issue_cmd(host_index, isa_virt_to_bus(scb), IM_SCB | ldn);
758 while (!got_interrupt(host_index))
759 barrier();
760
761 /*if command successful, break */
762 if ((stat_result(host_index) == IM_SCB_CMD_COMPLETED) || (stat_result(host_index) == IM_SCB_CMD_COMPLETED_WITH_RETRIES))
763 return 1;
764 }
765 /*if all three retries failed, return "no device at this ldn" */
766 if (retr >= 3)
767 return 0;
768 else
769 return 1;
770 }
771
772 static int read_capacity(int host_index, int ldn)
773 {
774 int retr;
775 struct im_scb *scb;
776 struct im_tsb *tsb;
777 unsigned char *buf;
778
779 scb = &(ld(host_index)[ldn].scb);
780 tsb = &(ld(host_index)[ldn].tsb);
781 buf = (unsigned char *) (&(ld(host_index)[ldn].buf));
782 ld(host_index)[ldn].tsb.dev_status = 0;
783 for (retr = 0; retr < 3; retr++) {
784 /*fill scb with read capacity command */
785 scb->command = IM_READ_CAPACITY_CMD;
786 scb->enable = IM_REPORT_TSB_ONLY_ON_ERROR | IM_READ_CONTROL | IM_RETRY_ENABLE | IM_BYPASS_BUFFER;
787 last_scsi_command(host_index)[ldn] = IM_READ_CAPACITY_CMD;
788 last_scsi_type(host_index)[ldn] = IM_SCB;
789 scb->sys_buf_adr = isa_virt_to_bus(buf);
790 scb->sys_buf_length = 8;
791 scb->tsb_adr = isa_virt_to_bus(tsb);
792 /*issue scb to passed ldn, and busy wait for interrupt */
793 got_interrupt(host_index) = 0;
794 issue_cmd(host_index, isa_virt_to_bus(scb), IM_SCB | ldn);
795 while (!got_interrupt(host_index))
796 barrier();
797
798 /*if got capacity, get block length and return one device found */
799 if ((stat_result(host_index) == IM_SCB_CMD_COMPLETED) || (stat_result(host_index) == IM_SCB_CMD_COMPLETED_WITH_RETRIES))
800 return 1;
801 }
802 /*if all three retries failed, return "no device at this ldn" */
803 if (retr >= 3)
804 return 0;
805 else
806 return 1;
807 }
808
809 static int get_pos_info(int host_index)
810 {
811 int retr;
812 struct im_scb *scb;
813 struct im_tsb *tsb;
814 unsigned char *buf;
815
816 scb = &(ld(host_index)[MAX_LOG_DEV].scb);
817 tsb = &(ld(host_index)[MAX_LOG_DEV].tsb);
818 buf = (unsigned char *) (&(ld(host_index)[MAX_LOG_DEV].buf));
819 ld(host_index)[MAX_LOG_DEV].tsb.dev_status = 0;
820 for (retr = 0; retr < 3; retr++) {
821 /*fill scb with get_pos_info command */
822 scb->command = IM_GET_POS_INFO_CMD;
823 scb->enable = IM_READ_CONTROL | IM_REPORT_TSB_ONLY_ON_ERROR | IM_RETRY_ENABLE | IM_BYPASS_BUFFER;
824 last_scsi_command(host_index)[MAX_LOG_DEV] = IM_GET_POS_INFO_CMD;
825 last_scsi_type(host_index)[MAX_LOG_DEV] = IM_SCB;
826 scb->sys_buf_adr = isa_virt_to_bus(buf);
827 if (special(host_index) == IBM_SCSI2_FW)
828 scb->sys_buf_length = 256; /* get all info from F/W adapter */
829 else
830 scb->sys_buf_length = 18; /* get exactly 18 bytes for other SCSI */
831 scb->tsb_adr = isa_virt_to_bus(tsb);
832 /*issue scb to ldn=15, and busy wait for interrupt */
833 got_interrupt(host_index) = 0;
834 issue_cmd(host_index, isa_virt_to_bus(scb), IM_SCB | MAX_LOG_DEV);
835
836 /* FIXME: timeout */
837 while (!got_interrupt(host_index))
838 barrier();
839
840 /*if got POS-stuff, get block length and return one device found */
841 if ((stat_result(host_index) == IM_SCB_CMD_COMPLETED) || (stat_result(host_index) == IM_SCB_CMD_COMPLETED_WITH_RETRIES))
842 return 1;
843 }
844 /* if all three retries failed, return "no device at this ldn" */
845 if (retr >= 3)
846 return 0;
847 else
848 return 1;
849 }
850
851 /* SCSI-immediate-command for assign. This functions maps/unmaps specific
852 ldn-numbers on SCSI (PUN,LUN). It is needed for presetting of the
853 subsystem and for dynamical remapping od ldns. */
854 static int immediate_assign(int host_index, unsigned int pun, unsigned int lun, unsigned int ldn, unsigned int operation)
855 {
856 int retr;
857 unsigned long imm_cmd;
858
859 for (retr = 0; retr < 3; retr++) {
860 /* select mutation level of the SCSI-adapter */
861 switch (special(host_index)) {
862 case IBM_SCSI2_FW:
863 imm_cmd = (unsigned long) (IM_ASSIGN_IMM_CMD);
864 imm_cmd |= (unsigned long) ((lun & 7) << 24);
865 imm_cmd |= (unsigned long) ((operation & 1) << 23);
866 imm_cmd |= (unsigned long) ((pun & 7) << 20) | ((pun & 8) << 24);
867 imm_cmd |= (unsigned long) ((ldn & 15) << 16);
868 break;
869 default:
870 imm_cmd = inl(IM_CMD_REG(host_index));
871 imm_cmd &= (unsigned long) (0xF8000000); /* keep reserved bits */
872 imm_cmd |= (unsigned long) (IM_ASSIGN_IMM_CMD);
873 imm_cmd |= (unsigned long) ((lun & 7) << 24);
874 imm_cmd |= (unsigned long) ((operation & 1) << 23);
875 imm_cmd |= (unsigned long) ((pun & 7) << 20);
876 imm_cmd |= (unsigned long) ((ldn & 15) << 16);
877 break;
878 }
879 last_scsi_command(host_index)[MAX_LOG_DEV] = IM_ASSIGN_IMM_CMD;
880 last_scsi_type(host_index)[MAX_LOG_DEV] = IM_IMM_CMD;
881 got_interrupt(host_index) = 0;
882 issue_cmd(host_index, (unsigned long) (imm_cmd), IM_IMM_CMD | MAX_LOG_DEV);
883 while (!got_interrupt(host_index))
884 barrier();
885
886 /*if command successful, break */
887 if (stat_result(host_index) == IM_IMMEDIATE_CMD_COMPLETED)
888 return 1;
889 }
890 if (retr >= 3)
891 return 0;
892 else
893 return 1;
894 }
895
896 static int immediate_feature(int host_index, unsigned int speed, unsigned int timeout)
897 {
898 int retr;
899 unsigned long imm_cmd;
900
901 for (retr = 0; retr < 3; retr++) {
902 /* select mutation level of the SCSI-adapter */
903 imm_cmd = IM_FEATURE_CTR_IMM_CMD;
904 imm_cmd |= (unsigned long) ((speed & 0x7) << 29);
905 imm_cmd |= (unsigned long) ((timeout & 0x1fff) << 16);
906 last_scsi_command(host_index)[MAX_LOG_DEV] = IM_FEATURE_CTR_IMM_CMD;
907 last_scsi_type(host_index)[MAX_LOG_DEV] = IM_IMM_CMD;
908 got_interrupt(host_index) = 0;
909 /* we need to run into command errors in order to probe for the
910 * right speed! */
911 global_command_error_excuse = 1;
912 issue_cmd(host_index, (unsigned long) (imm_cmd), IM_IMM_CMD | MAX_LOG_DEV);
913
914 /* FIXME: timeout */
915 while (!got_interrupt(host_index))
916 barrier();
917 if (global_command_error_excuse == CMD_FAIL) {
918 global_command_error_excuse = 0;
919 return 2;
920 } else
921 global_command_error_excuse = 0;
922 /*if command successful, break */
923 if (stat_result(host_index) == IM_IMMEDIATE_CMD_COMPLETED)
924 return 1;
925 }
926 if (retr >= 3)
927 return 0;
928 else
929 return 1;
930 }
931
932 #ifdef CONFIG_IBMMCA_SCSI_DEV_RESET
933 static int immediate_reset(int host_index, unsigned int ldn)
934 {
935 int retries;
936 int ticks;
937 unsigned long imm_command;
938
939 for (retries = 0; retries < 3; retries++) {
940 imm_command = inl(IM_CMD_REG(host_index));
941 imm_command &= (unsigned long) (0xFFFF0000); /* keep reserved bits */
942 imm_command |= (unsigned long) (IM_RESET_IMM_CMD);
943 last_scsi_command(host_index)[ldn] = IM_RESET_IMM_CMD;
944 last_scsi_type(host_index)[ldn] = IM_IMM_CMD;
945 got_interrupt(host_index) = 0;
946 reset_status(host_index) = IM_RESET_IN_PROGRESS;
947 issue_cmd(host_index, (unsigned long) (imm_command), IM_IMM_CMD | ldn);
948 ticks = IM_RESET_DELAY * HZ;
949 while (reset_status(host_index) == IM_RESET_IN_PROGRESS && --ticks) {
950 udelay((1 + 999 / HZ) * 1000);
951 barrier();
952 }
953 /* if reset did not complete, just complain */
954 if (!ticks) {
955 printk(KERN_ERR "IBM MCA SCSI: reset did not complete within %d seconds.\n", IM_RESET_DELAY);
956 reset_status(host_index) = IM_RESET_FINISHED_OK;
957 /* did not work, finish */
958 return 1;
959 }
960 /*if command successful, break */
961 if (stat_result(host_index) == IM_IMMEDIATE_CMD_COMPLETED)
962 return 1;
963 }
964 if (retries >= 3)
965 return 0;
966 else
967 return 1;
968 }
969 #endif
970
971 /* type-interpreter for physical device numbers */
972 static char *ti_p(int dev)
973 {
974 switch (dev) {
975 case TYPE_IBM_SCSI_ADAPTER:
976 return ("A");
977 case TYPE_DISK:
978 return ("D");
979 case TYPE_TAPE:
980 return ("T");
981 case TYPE_PROCESSOR:
982 return ("P");
983 case TYPE_WORM:
984 return ("W");
985 case TYPE_ROM:
986 return ("R");
987 case TYPE_SCANNER:
988 return ("S");
989 case TYPE_MOD:
990 return ("M");
991 case TYPE_MEDIUM_CHANGER:
992 return ("C");
993 case TYPE_NO_LUN:
994 return ("+"); /* show NO_LUN */
995 }
996 return ("-"); /* TYPE_NO_DEVICE and others */
997 }
998
999 /* interpreter for logical device numbers (ldn) */
1000 static char *ti_l(int val)
1001 {
1002 const char hex[16] = "0123456789abcdef";
1003 static char answer[2];
1004
1005 answer[1] = (char) (0x0);
1006 if (val <= MAX_LOG_DEV)
1007 answer[0] = hex[val];
1008 else
1009 answer[0] = '-';
1010 return (char *) &answer;
1011 }
1012
1013 /* transfers bitpattern of the feature command to values in MHz */
1014 static char *ibmrate(unsigned int speed, int i)
1015 {
1016 switch (speed) {
1017 case 0:
1018 return i ? "5.00" : "10.00";
1019 case 1:
1020 return i ? "4.00" : "8.00";
1021 case 2:
1022 return i ? "3.33" : "6.66";
1023 case 3:
1024 return i ? "2.86" : "5.00";
1025 case 4:
1026 return i ? "2.50" : "4.00";
1027 case 5:
1028 return i ? "2.22" : "3.10";
1029 case 6:
1030 return i ? "2.00" : "2.50";
1031 case 7:
1032 return i ? "1.82" : "2.00";
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);
1049 outb('C', MOD95_LED_PORT + 6);
1050 outb('S', MOD95_LED_PORT + 5);
1051 outb('I', MOD95_LED_PORT + 4);
1052 outb('i', MOD95_LED_PORT + 3);
1053 outb('n', MOD95_LED_PORT + 2);
1054 outb('i', MOD95_LED_PORT + 1);
1055 outb((char) (rotor[rotator]), MOD95_LED_PORT);
1056 rotator++;
1057 if (rotator > 3)
1058 rotator = 0;
1059 }
1060 return 0;
1061 }
1062
1063 static int probe_bus_mode(int host_index)
1064 {
1065 struct im_pos_info *info;
1066 int num_bus = 0;
1067 int ldn;
1068
1069 info = (struct im_pos_info *) (&(ld(host_index)[MAX_LOG_DEV].buf));
1070 if (get_pos_info(host_index)) {
1071 if (info->connector_size & 0xf000)
1072 subsystem_connector_size(host_index) = 16;
1073 else
1074 subsystem_connector_size(host_index) = 32;
1075 num_bus |= (info->pos_4b & 8) >> 3;
1076 for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) {
1077 if ((special(host_index) == IBM_SCSI_WCACHE) || (special(host_index) == IBM_7568_WCACHE)) {
1078 if (!((info->cache_stat >> ldn) & 1))
1079 ld(host_index)[ldn].cache_flag = 0;
1080 }
1081 if (!((info->retry_stat >> ldn) & 1))
1082 ld(host_index)[ldn].retry_flag = 0;
1083 }
1084 #ifdef IM_DEBUG_PROBE
1085 printk("IBM MCA SCSI: SCSI-Cache bits: ");
1086 for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) {
1087 printk("%d", ld(host_index)[ldn].cache_flag);
1088 }
1089 printk("\nIBM MCA SCSI: SCSI-Retry bits: ");
1090 for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) {
1091 printk("%d", ld(host_index)[ldn].retry_flag);
1092 }
1093 printk("\n");
1094 #endif
1095 }
1096 return num_bus;
1097 }
1098
1099 /* probing scsi devices */
1100 static void check_devices(int host_index, int adaptertype)
1101 {
1102 int id, lun, ldn, ticks;
1103 int count_devices; /* local counter for connected device */
1104 int max_pun;
1105 int num_bus;
1106 int speedrun; /* local adapter_speed check variable */
1107
1108 /* assign default values to certain variables */
1109 ticks = 0;
1110 count_devices = 0;
1111 IBM_DS(host_index).dyn_flag = 0; /* normally no need for dynamical ldn management */
1112 IBM_DS(host_index).total_errors = 0; /* set errorcounter to 0 */
1113 next_ldn(host_index) = 7; /* next ldn to be assigned is 7, because 0-6 is 'hardwired' */
1114
1115 /* initialize the very important driver-informational arrays/structs */
1116 memset(ld(host_index), 0, sizeof(ld(host_index)));
1117 for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) {
1118 last_scsi_command(host_index)[ldn] = NO_SCSI; /* emptify last SCSI-command storage */
1119 last_scsi_type(host_index)[ldn] = 0;
1120 ld(host_index)[ldn].cache_flag = 1;
1121 ld(host_index)[ldn].retry_flag = 1;
1122 }
1123 memset(get_ldn(host_index), TYPE_NO_DEVICE, sizeof(get_ldn(host_index))); /* this is essential ! */
1124 memset(get_scsi(host_index), TYPE_NO_DEVICE, sizeof(get_scsi(host_index))); /* this is essential ! */
1125 for (lun = 0; lun < 8; lun++) {
1126 /* mark the adapter at its pun on all luns */
1127 get_scsi(host_index)[subsystem_pun(host_index)][lun] = TYPE_IBM_SCSI_ADAPTER;
1128 get_ldn(host_index)[subsystem_pun(host_index)][lun] = MAX_LOG_DEV; /* make sure, the subsystem
1129 ldn is active for all
1130 luns. */
1131 }
1132 probe_display(0); /* Supercool display usage during SCSI-probing. */
1133 /* This makes sense, when booting without any */
1134 /* monitor connected on model XX95. */
1135
1136 /* STEP 1: */
1137 adapter_speed(host_index) = global_adapter_speed;
1138 speedrun = adapter_speed(host_index);
1139 while (immediate_feature(host_index, speedrun, adapter_timeout) == 2) {
1140 probe_display(1);
1141 if (speedrun == 7)
1142 panic("IBM MCA SCSI: Cannot set Synchronous-Transfer-Rate!\n");
1143 speedrun++;
1144 if (speedrun > 7)
1145 speedrun = 7;
1146 }
1147 adapter_speed(host_index) = speedrun;
1148 /* Get detailed information about the current adapter, necessary for
1149 * device operations: */
1150 num_bus = probe_bus_mode(host_index);
1151
1152 /* num_bus contains only valid data for the F/W adapter! */
1153 if (adaptertype == IBM_SCSI2_FW) { /* F/W SCSI adapter: */
1154 /* F/W adapter PUN-space extension evaluation: */
1155 if (num_bus) {
1156 printk(KERN_INFO "IBM MCA SCSI: Separate bus mode (wide-addressing enabled)\n");
1157 subsystem_maxid(host_index) = 16;
1158 } else {
1159 printk(KERN_INFO "IBM MCA SCSI: Combined bus mode (wide-addressing disabled)\n");
1160 subsystem_maxid(host_index) = 8;
1161 }
1162 printk(KERN_INFO "IBM MCA SCSI: Sync.-Rate (F/W: 20, Int.: 10, Ext.: %s) MBytes/s\n", ibmrate(speedrun, adaptertype));
1163 } else /* all other IBM SCSI adapters: */
1164 printk(KERN_INFO "IBM MCA SCSI: Synchronous-SCSI-Transfer-Rate: %s MBytes/s\n", ibmrate(speedrun, adaptertype));
1165
1166 /* assign correct PUN device space */
1167 max_pun = subsystem_maxid(host_index);
1168
1169 #ifdef IM_DEBUG_PROBE
1170 printk("IBM MCA SCSI: Current SCSI-host index: %d\n", host_index);
1171 printk("IBM MCA SCSI: Removing default logical SCSI-device mapping.");
1172 #else
1173 printk(KERN_INFO "IBM MCA SCSI: Dev. Order: %s, Mapping (takes <2min): ", (ibm_ansi_order) ? "ANSI" : "New");
1174 #endif
1175 for (ldn = 0; ldn < MAX_LOG_DEV; ldn++) {
1176 probe_display(1);
1177 #ifdef IM_DEBUG_PROBE
1178 printk(".");
1179 #endif
1180 immediate_assign(host_index, 0, 0, ldn, REMOVE_LDN); /* remove ldn (wherever) */
1181 }
1182 lun = 0; /* default lun is 0 */
1183 #ifndef IM_DEBUG_PROBE
1184 printk("cleared,");
1185 #endif
1186 /* STEP 2: */
1187 #ifdef IM_DEBUG_PROBE
1188 printk("\nIBM MCA SCSI: Scanning SCSI-devices.");
1189 #endif
1190 for (id = 0; id < max_pun; id++)
1191 #ifdef CONFIG_SCSI_MULTI_LUN
1192 for (lun = 0; lun < 8; lun++)
1193 #endif
1194 {
1195 probe_display(1);
1196 #ifdef IM_DEBUG_PROBE
1197 printk(".");
1198 #endif
1199 if (id != subsystem_pun(host_index)) {
1200 /* if pun is not the adapter: */
1201 /* set ldn=0 to pun,lun */
1202 immediate_assign(host_index, id, lun, PROBE_LDN, SET_LDN);
1203 if (device_inquiry(host_index, PROBE_LDN)) { /* probe device */
1204 get_scsi(host_index)[id][lun] = (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 && get_scsi(host_index)[id][lun] != TYPE_NO_DEVICE) {
1232 /* Only map if accepted type. Always enter for
1233 lun == 0 to get no gaps into ldn-mapping for ldn<7. */
1234 immediate_assign(host_index, id, lun, ldn, SET_LDN);
1235 get_ldn(host_index)[id][lun] = ldn; /* map ldn */
1236 if (device_exists(host_index, ldn, &ld(host_index)[ldn].block_length, &ld(host_index)[ldn].device_type)) {
1237 #ifdef CONFIG_IBMMCA_SCSI_DEV_RESET
1238 printk("resetting device at ldn=%x ... ", ldn);
1239 immediate_reset(host_index, ldn);
1240 #endif
1241 ldn++;
1242 } else {
1243 /* device vanished, probably because we don't know how to
1244 * handle it or because it has problems */
1245 if (lun > 0) {
1246 /* remove mapping */
1247 get_ldn(host_index)[id][lun] = TYPE_NO_DEVICE;
1248 immediate_assign(host_index, 0, 0, ldn, REMOVE_LDN);
1249 } else
1250 ldn++;
1251 }
1252 } else if (lun == 0) {
1253 /* map lun == 0, even if no device exists */
1254 immediate_assign(host_index, id, lun, ldn, SET_LDN);
1255 get_ldn(host_index)[id][lun] = ldn; /* map ldn */
1256 ldn++;
1257 }
1258 }
1259 }
1260 /* STEP 4: */
1261
1262 /* map remaining ldns to non-existing devices */
1263 for (lun = 1; lun < 8 && ldn < MAX_LOG_DEV; lun++)
1264 for (id = 0; id < max_pun && ldn < MAX_LOG_DEV; id++) {
1265 if (get_scsi(host_index)[id][lun] == TYPE_NO_LUN || get_scsi(host_index)[id][lun] == TYPE_NO_DEVICE) {
1266 probe_display(1);
1267 /* Map remaining ldns only to NON-existing pun,lun
1268 combinations to make sure an inquiry will fail.
1269 For MULTI_LUN, it is needed to avoid adapter autonome
1270 SCSI-remapping. */
1271 immediate_assign(host_index, id, lun, ldn, SET_LDN);
1272 get_ldn(host_index)[id][lun] = ldn;
1273 ldn++;
1274 }
1275 }
1276 #ifndef IM_DEBUG_PROBE
1277 printk("mapped.");
1278 #endif
1279 printk("\n");
1280 #ifdef IM_DEBUG_PROBE
1281 if (ibm_ansi_order)
1282 printk("IBM MCA SCSI: Device order: IBM/ANSI (pun=7 is first).\n");
1283 else
1284 printk("IBM MCA SCSI: Device order: New Industry Standard (pun=0 is first).\n");
1285 #endif
1286
1287 #ifdef IM_DEBUG_PROBE
1288 /* Show the physical and logical mapping during boot. */
1289 printk("IBM MCA SCSI: Determined SCSI-device-mapping:\n");
1290 printk(" Physical SCSI-Device Map Logical SCSI-Device Map\n");
1291 printk("ID\\LUN 0 1 2 3 4 5 6 7 ID\\LUN 0 1 2 3 4 5 6 7\n");
1292 for (id = 0; id < max_pun; id++) {
1293 printk("%2d ", id);
1294 for (lun = 0; lun < 8; lun++)
1295 printk("%2s ", ti_p(get_scsi(host_index)[id][lun]));
1296 printk(" %2d ", id);
1297 for (lun = 0; lun < 8; lun++)
1298 printk("%2s ", ti_l(get_ldn(host_index)[id][lun]));
1299 printk("\n");
1300 }
1301 #endif
1302
1303 /* assign total number of found SCSI-devices to the statistics struct */
1304 IBM_DS(host_index).total_scsi_devices = count_devices;
1305
1306 /* decide for output in /proc-filesystem, if the configuration of
1307 SCSI-devices makes dynamical reassignment of devices necessary */
1308 if (count_devices >= MAX_LOG_DEV)
1309 IBM_DS(host_index).dyn_flag = 1; /* dynamical assignment is necessary */
1310 else
1311 IBM_DS(host_index).dyn_flag = 0; /* dynamical assignment is not necessary */
1312
1313 /* If no SCSI-devices are assigned, return 1 in order to cause message. */
1314 if (ldn == 0)
1315 printk("IBM MCA SCSI: Warning: No SCSI-devices found/assigned!\n");
1316
1317 /* reset the counters for statistics on the current adapter */
1318 IBM_DS(host_index).scbs = 0;
1319 IBM_DS(host_index).long_scbs = 0;
1320 IBM_DS(host_index).total_accesses = 0;
1321 IBM_DS(host_index).total_interrupts = 0;
1322 IBM_DS(host_index).dynamical_assignments = 0;
1323 memset(IBM_DS(host_index).ldn_access, 0x0, sizeof(IBM_DS(host_index).ldn_access));
1324 memset(IBM_DS(host_index).ldn_read_access, 0x0, sizeof(IBM_DS(host_index).ldn_read_access));
1325 memset(IBM_DS(host_index).ldn_write_access, 0x0, sizeof(IBM_DS(host_index).ldn_write_access));
1326 memset(IBM_DS(host_index).ldn_inquiry_access, 0x0, sizeof(IBM_DS(host_index).ldn_inquiry_access));
1327 memset(IBM_DS(host_index).ldn_modeselect_access, 0x0, sizeof(IBM_DS(host_index).ldn_modeselect_access));
1328 memset(IBM_DS(host_index).ldn_assignments, 0x0, sizeof(IBM_DS(host_index).ldn_assignments));
1329 probe_display(0);
1330 return;
1331 }
1332
1333 static int device_exists(int host_index, int ldn, int *block_length, int *device_type)
1334 {
1335 unsigned char *buf;
1336 /* if no valid device found, return immediately with 0 */
1337 if (!(device_inquiry(host_index, ldn)))
1338 return 0;
1339 buf = (unsigned char *) (&(ld(host_index)[ldn].buf));
1340 if (*buf == TYPE_ROM) {
1341 *device_type = TYPE_ROM;
1342 *block_length = 2048; /* (standard blocksize for yellow-/red-book) */
1343 return 1;
1344 }
1345 if (*buf == TYPE_WORM) {
1346 *device_type = TYPE_WORM;
1347 *block_length = 2048;
1348 return 1;
1349 }
1350 if (*buf == TYPE_DISK) {
1351 *device_type = TYPE_DISK;
1352 if (read_capacity(host_index, ldn)) {
1353 *block_length = *(buf + 7) + (*(buf + 6) << 8) + (*(buf + 5) << 16) + (*(buf + 4) << 24);
1354 return 1;
1355 } else
1356 return 0;
1357 }
1358 if (*buf == TYPE_MOD) {
1359 *device_type = TYPE_MOD;
1360 if (read_capacity(host_index, ldn)) {
1361 *block_length = *(buf + 7) + (*(buf + 6) << 8) + (*(buf + 5) << 16) + (*(buf + 4) << 24);
1362 return 1;
1363 } else
1364 return 0;
1365 }
1366 if (*buf == TYPE_TAPE) {
1367 *device_type = TYPE_TAPE;
1368 *block_length = 0; /* not in use (setting by mt and mtst in op.) */
1369 return 1;
1370 }
1371 if (*buf == TYPE_PROCESSOR) {
1372 *device_type = TYPE_PROCESSOR;
1373 *block_length = 0; /* they set their stuff on drivers */
1374 return 1;
1375 }
1376 if (*buf == TYPE_SCANNER) {
1377 *device_type = TYPE_SCANNER;
1378 *block_length = 0; /* they set their stuff on drivers */
1379 return 1;
1380 }
1381 if (*buf == TYPE_MEDIUM_CHANGER) {
1382 *device_type = TYPE_MEDIUM_CHANGER;
1383 *block_length = 0; /* One never knows, what to expect on a medium
1384 changer device. */
1385 return 1;
1386 }
1387 return 0;
1388 }
1389
1390 static void internal_ibmmca_scsi_setup(char *str, int *ints)
1391 {
1392 int i, j, io_base, id_base;
1393 char *token;
1394
1395 io_base = 0;
1396 id_base = 0;
1397 if (str) {
1398 j = 0;
1399 while ((token = strsep(&str, ",")) != NULL) {
1400 if (!strcmp(token, "activity"))
1401 display_mode |= LED_ACTIVITY;
1402 if (!strcmp(token, "display"))
1403 display_mode |= LED_DISP;
1404 if (!strcmp(token, "adisplay"))
1405 display_mode |= LED_ADISP;
1406 if (!strcmp(token, "normal"))
1407 ibm_ansi_order = 0;
1408 if (!strcmp(token, "ansi"))
1409 ibm_ansi_order = 1;
1410 if (!strcmp(token, "fast"))
1411 global_adapter_speed = 0;
1412 if (!strcmp(token, "medium"))
1413 global_adapter_speed = 4;
1414 if (!strcmp(token, "slow"))
1415 global_adapter_speed = 7;
1416 if ((*token == '-') || (isdigit(*token))) {
1417 if (!(j % 2) && (io_base < IM_MAX_HOSTS))
1418 io_port[io_base++] = simple_strtoul(token, NULL, 0);
1419 if ((j % 2) && (id_base < IM_MAX_HOSTS))
1420 scsi_id[id_base++] = simple_strtoul(token, NULL, 0);
1421 j++;
1422 }
1423 }
1424 } else if (ints) {
1425 for (i = 0; i < IM_MAX_HOSTS && 2 * i + 2 < ints[0]; i++) {
1426 io_port[i] = ints[2 * i + 2];
1427 scsi_id[i] = ints[2 * i + 2];
1428 }
1429 }
1430 return;
1431 }
1432
1433 static int ibmmca_getinfo(char *buf, int slot, void *dev_id)
1434 {
1435 struct Scsi_Host *shpnt;
1436 int len, speciale, connectore, k;
1437 unsigned int pos[8];
1438 unsigned long flags;
1439 struct Scsi_Host *dev = dev_id;
1440
1441 spin_lock_irqsave(dev->host_lock, flags);
1442
1443 shpnt = dev; /* assign host-structure to local pointer */
1444 len = 0; /* set filled text-buffer index to 0 */
1445 /* get the _special contents of the hostdata structure */
1446 speciale = ((struct ibmmca_hostdata *) shpnt->hostdata)->_special;
1447 connectore = ((struct ibmmca_hostdata *) shpnt->hostdata)->_connector_size;
1448 for (k = 2; k < 4; k++)
1449 pos[k] = ((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k];
1450 if (speciale == FORCED_DETECTION) { /* forced detection */
1451 len += sprintf(buf + len,
1452 "Adapter category: forced detected\n" "***************************************\n" "*** Forced detected SCSI Adapter ***\n" "*** No chip-information available ***\n" "***************************************\n");
1453 } else if (speciale == INTEGRATED_SCSI) {
1454 /* if the integrated subsystem has been found automatically: */
1455 len += sprintf(buf + len,
1456 "Adapter category: integrated\n" "Chip revision level: %d\n" "Chip status: %s\n" "8 kByte NVRAM status: %s\n", ((pos[2] & 0xf0) >> 4), (pos[2] & 1) ? "enabled" : "disabled", (pos[2] & 2) ? "locked" : "accessible");
1457 } else if ((speciale >= 0) && (speciale < ARRAY_SIZE(subsys_list))) {
1458 /* if the subsystem is a slot adapter */
1459 len += sprintf(buf + len, "Adapter category: slot-card\n" "ROM Segment Address: ");
1460 if ((pos[2] & 0xf0) == 0xf0)
1461 len += sprintf(buf + len, "off\n");
1462 else
1463 len += sprintf(buf + len, "0x%x\n", ((pos[2] & 0xf0) << 13) + 0xc0000);
1464 len += sprintf(buf + len, "Chip status: %s\n", (pos[2] & 1) ? "enabled" : "disabled");
1465 len += sprintf(buf + len, "Adapter I/O Offset: 0x%x\n", ((pos[2] & 0x0e) << 2));
1466 } else {
1467 len += sprintf(buf + len, "Adapter category: unknown\n");
1468 }
1469 /* common subsystem information to write to the slotn file */
1470 len += sprintf(buf + len, "Subsystem PUN: %d\n", shpnt->this_id);
1471 len += sprintf(buf + len, "I/O base address range: 0x%x-0x%x\n", (unsigned int) (shpnt->io_port), (unsigned int) (shpnt->io_port + 7));
1472 len += sprintf(buf + len, "MCA-slot size: %d bits", connectore);
1473 /* Now make sure, the bufferlength is devidable by 4 to avoid
1474 * paging problems of the buffer. */
1475 while (len % sizeof(int) != (sizeof(int) - 1))
1476 len += sprintf(buf + len, " ");
1477 len += sprintf(buf + len, "\n");
1478
1479 spin_unlock_irqrestore(shpnt->host_lock, flags);
1480
1481 return len;
1482 }
1483
1484 int ibmmca_detect(struct scsi_host_template * scsi_template)
1485 {
1486 struct Scsi_Host *shpnt;
1487 int port, id, i, j, k, slot;
1488 int devices_on_irq_11 = 0;
1489 int devices_on_irq_14 = 0;
1490 int IRQ14_registered = 0;
1491 int IRQ11_registered = 0;
1492
1493 found = 0; /* make absolutely sure, that found is set to 0 */
1494
1495 /* First of all, print the version number of the driver. This is
1496 * important to allow better user bugreports in case of already
1497 * having problems with the MCA_bus probing. */
1498 printk(KERN_INFO "IBM MCA SCSI: Version %s\n", IBMMCA_SCSI_DRIVER_VERSION);
1499 /* if this is not MCA machine, return "nothing found" */
1500 if (!MCA_bus) {
1501 printk(KERN_INFO "IBM MCA SCSI: No Microchannel-bus present --> Aborting.\n" " This machine does not have any IBM MCA-bus\n" " or the MCA-Kernel-support is not enabled!\n");
1502 return 0;
1503 }
1504
1505 #ifdef MODULE
1506 /* If the driver is run as module, read from conf.modules or cmd-line */
1507 if (boot_options)
1508 option_setup(boot_options);
1509 #endif
1510
1511 /* get interrupt request level */
1512 if (request_irq(IM_IRQ, interrupt_handler, IRQF_SHARED, "ibmmcascsi", hosts)) {
1513 printk(KERN_ERR "IBM MCA SCSI: Unable to get shared IRQ %d.\n", IM_IRQ);
1514 return 0;
1515 } else
1516 IRQ14_registered++;
1517
1518 /* if ibmmcascsi setup option was passed to kernel, return "found" */
1519 for (i = 0; i < IM_MAX_HOSTS; i++)
1520 if (io_port[i] > 0 && scsi_id[i] >= 0 && scsi_id[i] < 8) {
1521 printk("IBM MCA SCSI: forced detected SCSI Adapter, io=0x%x, scsi id=%d.\n", io_port[i], scsi_id[i]);
1522 if ((shpnt = ibmmca_register(scsi_template, io_port[i], scsi_id[i], FORCED_DETECTION, "forced detected SCSI Adapter"))) {
1523 for (k = 2; k < 7; k++)
1524 ((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k] = 0;
1525 ((struct ibmmca_hostdata *) shpnt->hostdata)->_special = FORCED_DETECTION;
1526 mca_set_adapter_name(MCA_INTEGSCSI, "forced detected SCSI Adapter");
1527 mca_set_adapter_procfn(MCA_INTEGSCSI, (MCA_ProcFn) ibmmca_getinfo, shpnt);
1528 mca_mark_as_used(MCA_INTEGSCSI);
1529 devices_on_irq_14++;
1530 }
1531 }
1532 if (found)
1533 return found;
1534
1535 /* The POS2-register of all PS/2 model SCSI-subsystems has the following
1536 * interpretation of bits:
1537 * Bit 7 - 4 : Chip Revision ID (Release)
1538 * Bit 3 - 2 : Reserved
1539 * Bit 1 : 8k NVRAM Disabled
1540 * Bit 0 : Chip Enable (EN-Signal)
1541 * The POS3-register is interpreted as follows:
1542 * Bit 7 - 5 : SCSI ID
1543 * Bit 4 : Reserved = 0
1544 * Bit 3 - 0 : Reserved = 0
1545 * (taken from "IBM, PS/2 Hardware Interface Technical Reference, Common
1546 * Interfaces (1991)").
1547 * In short words, this means, that IBM PS/2 machines only support
1548 * 1 single subsystem by default. The slot-adapters must have another
1549 * configuration on pos2. Here, one has to assume the following
1550 * things for POS2-register:
1551 * Bit 7 - 4 : Chip Revision ID (Release)
1552 * Bit 3 - 1 : port offset factor
1553 * Bit 0 : Chip Enable (EN-Signal)
1554 * As I found a patch here, setting the IO-registers to 0x3540 forced,
1555 * as there was a 0x05 in POS2 on a model 56, I assume, that the
1556 * port 0x3540 must be fix for integrated SCSI-controllers.
1557 * Ok, this discovery leads to the following implementation: (M.Lang) */
1558
1559 /* first look for the IBM SCSI integrated subsystem on the motherboard */
1560 for (j = 0; j < 8; j++) /* read the pos-information */
1561 pos[j] = mca_read_stored_pos(MCA_INTEGSCSI, j);
1562 /* pos2 = pos3 = 0xff if there is no integrated SCSI-subsystem present, but
1563 * if we ignore the settings of all surrounding pos registers, it is not
1564 * completely sufficient to only check pos2 and pos3. */
1565 /* Therefore, now the following if statement is used to
1566 * make sure, we see a real integrated onboard SCSI-interface and no
1567 * internal system information, which gets mapped to some pos registers
1568 * on models 95xx. */
1569 if ((!pos[0] && !pos[1] && pos[2] > 0 && pos[3] > 0 && !pos[4] && !pos[5] && !pos[6] && !pos[7]) || (pos[0] == 0xff && pos[1] == 0xff && pos[2] < 0xff && pos[3] < 0xff && pos[4] == 0xff && pos[5] == 0xff && pos[6] == 0xff && pos[7] == 0xff)) {
1570 if ((pos[2] & 1) == 1) /* is the subsystem chip enabled ? */
1571 port = IM_IO_PORT;
1572 else { /* if disabled, no IRQs will be generated, as the chip won't
1573 * listen to the incoming commands and will do really nothing,
1574 * except for listening to the pos-register settings. If this
1575 * happens, I need to hugely think about it, as one has to
1576 * write something to the MCA-Bus pos register in order to
1577 * enable the chip. Normally, IBM-SCSI won't pass the POST,
1578 * when the chip is disabled (see IBM tech. ref.). */
1579 port = IM_IO_PORT; /* anyway, set the portnumber and warn */
1580 printk("IBM MCA SCSI: WARNING - Your SCSI-subsystem is disabled!\n" " SCSI-operations may not work.\n");
1581 }
1582 id = (pos[3] & 0xe0) >> 5; /* this is correct and represents the PUN */
1583 /* give detailed information on the subsystem. This helps me
1584 * additionally during debugging and analyzing bug-reports. */
1585 printk(KERN_INFO "IBM MCA SCSI: IBM Integrated SCSI Controller ffound, io=0x%x, scsi id=%d,\n", port, id);
1586 printk(KERN_INFO " chip rev.=%d, 8K NVRAM=%s, subsystem=%s\n", ((pos[2] & 0xf0) >> 4), (pos[2] & 2) ? "locked" : "accessible", (pos[2] & 1) ? "enabled." : "disabled.");
1587
1588 /* register the found integrated SCSI-subsystem */
1589 if ((shpnt = ibmmca_register(scsi_template, port, id, INTEGRATED_SCSI, "IBM Integrated SCSI Controller")))
1590 {
1591 for (k = 2; k < 7; k++)
1592 ((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k] = pos[k];
1593 ((struct ibmmca_hostdata *) shpnt->hostdata)->_special = INTEGRATED_SCSI;
1594 mca_set_adapter_name(MCA_INTEGSCSI, "IBM Integrated SCSI Controller");
1595 mca_set_adapter_procfn(MCA_INTEGSCSI, (MCA_ProcFn) ibmmca_getinfo, shpnt);
1596 mca_mark_as_used(MCA_INTEGSCSI);
1597 devices_on_irq_14++;
1598 }
1599 }
1600
1601 /* now look for other adapters in MCA slots, */
1602 /* determine the number of known IBM-SCSI-subsystem types */
1603 /* see the pos[2] dependence to get the adapter port-offset. */
1604 for (i = 0; i < ARRAY_SIZE(subsys_list); i++) {
1605 /* scan each slot for a fitting adapter id */
1606 slot = 0; /* start at slot 0 */
1607 while ((slot = mca_find_adapter(subsys_list[i].mca_id, slot))
1608 != MCA_NOTFOUND) { /* scan through all slots */
1609 for (j = 0; j < 8; j++) /* read the pos-information */
1610 pos[j] = mca_read_stored_pos(slot, j);
1611 if ((pos[2] & 1) == 1)
1612 /* is the subsystem chip enabled ? */
1613 /* (explanations see above) */
1614 port = IM_IO_PORT + ((pos[2] & 0x0e) << 2);
1615 else {
1616 /* anyway, set the portnumber and warn */
1617 port = IM_IO_PORT + ((pos[2] & 0x0e) << 2);
1618 printk(KERN_WARNING "IBM MCA SCSI: WARNING - Your SCSI-subsystem is disabled!\n");
1619 printk(KERN_WARNING " SCSI-operations may not work.\n");
1620 }
1621 if ((i == IBM_SCSI2_FW) && (pos[6] != 0)) {
1622 printk(KERN_ERR "IBM MCA SCSI: ERROR - Wrong POS(6)-register setting!\n");
1623 printk(KERN_ERR " Impossible to determine adapter PUN!\n");
1624 printk(KERN_ERR " Guessing adapter PUN = 7.\n");
1625 id = 7;
1626 } else {
1627 id = (pos[3] & 0xe0) >> 5; /* get subsystem PUN */
1628 if (i == IBM_SCSI2_FW) {
1629 id |= (pos[3] & 0x10) >> 1; /* get subsystem PUN high-bit
1630 * for F/W adapters */
1631 }
1632 }
1633 if ((i == IBM_SCSI2_FW) && (pos[4] & 0x01) && (pos[6] == 0)) {
1634 /* IRQ11 is used by SCSI-2 F/W Adapter/A */
1635 printk(KERN_DEBUG "IBM MCA SCSI: SCSI-2 F/W adapter needs IRQ 11.\n");
1636 /* get interrupt request level */
1637 if (request_irq(IM_IRQ_FW, interrupt_handler, IRQF_SHARED, "ibmmcascsi", hosts)) {
1638 printk(KERN_ERR "IBM MCA SCSI: Unable to get shared IRQ %d.\n", IM_IRQ_FW);
1639 } else
1640 IRQ11_registered++;
1641 }
1642 printk(KERN_INFO "IBM MCA SCSI: %s found in slot %d, io=0x%x, scsi id=%d,\n", subsys_list[i].description, slot + 1, port, id);
1643 if ((pos[2] & 0xf0) == 0xf0)
1644 printk(KERN_DEBUG" ROM Addr.=off,");
1645 else
1646 printk(KERN_DEBUG " ROM Addr.=0x%x,", ((pos[2] & 0xf0) << 13) + 0xc0000);
1647 printk(KERN_DEBUG " port-offset=0x%x, subsystem=%s\n", ((pos[2] & 0x0e) << 2), (pos[2] & 1) ? "enabled." : "disabled.");
1648
1649 /* register the hostadapter */
1650 if ((shpnt = ibmmca_register(scsi_template, port, id, i, subsys_list[i].description))) {
1651 for (k = 2; k < 8; k++)
1652 ((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k] = pos[k];
1653 ((struct ibmmca_hostdata *) shpnt->hostdata)->_special = i;
1654 mca_set_adapter_name(slot, subsys_list[i].description);
1655 mca_set_adapter_procfn(slot, (MCA_ProcFn) ibmmca_getinfo, shpnt);
1656 mca_mark_as_used(slot);
1657 if ((i == IBM_SCSI2_FW) && (pos[4] & 0x01) && (pos[6] == 0))
1658 devices_on_irq_11++;
1659 else
1660 devices_on_irq_14++;
1661 }
1662 slot++; /* advance to next slot */
1663 } /* advance to next adapter id in the list of IBM-SCSI-subsystems */
1664 }
1665
1666 /* now check for SCSI-adapters, mapped to the integrated SCSI
1667 * area. E.g. a W/Cache in MCA-slot 9(!). Do the check correct here,
1668 * as this is a known effect on some models 95xx. */
1669 for (i = 0; i < ARRAY_SIZE(subsys_list); i++) {
1670 /* scan each slot for a fitting adapter id */
1671 slot = mca_find_adapter(subsys_list[i].mca_id, MCA_INTEGSCSI);
1672 if (slot != MCA_NOTFOUND) { /* scan through all slots */
1673 for (j = 0; j < 8; j++) /* read the pos-information */
1674 pos[j] = mca_read_stored_pos(slot, j);
1675 if ((pos[2] & 1) == 1) { /* is the subsystem chip enabled ? */
1676 /* (explanations see above) */
1677 port = IM_IO_PORT + ((pos[2] & 0x0e) << 2);
1678 } else { /* anyway, set the portnumber and warn */
1679 port = IM_IO_PORT + ((pos[2] & 0x0e) << 2);
1680 printk(KERN_WARNING "IBM MCA SCSI: WARNING - Your SCSI-subsystem is disabled!\n");
1681 printk(KERN_WARNING " SCSI-operations may not work.\n");
1682 }
1683 if ((i == IBM_SCSI2_FW) && (pos[6] != 0)) {
1684 printk(KERN_ERR "IBM MCA SCSI: ERROR - Wrong POS(6)-register setting!\n");
1685 printk(KERN_ERR " Impossible to determine adapter PUN!\n");
1686 printk(KERN_ERR " Guessing adapter PUN = 7.\n");
1687 id = 7;
1688 } else {
1689 id = (pos[3] & 0xe0) >> 5; /* get subsystem PUN */
1690 if (i == IBM_SCSI2_FW)
1691 id |= (pos[3] & 0x10) >> 1; /* get subsystem PUN high-bit
1692 * for F/W adapters */
1693 }
1694 if ((i == IBM_SCSI2_FW) && (pos[4] & 0x01) && (pos[6] == 0)) {
1695 /* IRQ11 is used by SCSI-2 F/W Adapter/A */
1696 printk(KERN_DEBUG "IBM MCA SCSI: SCSI-2 F/W adapter needs IRQ 11.\n");
1697 /* get interrupt request level */
1698 if (request_irq(IM_IRQ_FW, interrupt_handler, IRQF_SHARED, "ibmmcascsi", hosts))
1699 printk(KERN_ERR "IBM MCA SCSI: Unable to get shared IRQ %d.\n", IM_IRQ_FW);
1700 else
1701 IRQ11_registered++;
1702 }
1703 printk(KERN_INFO "IBM MCA SCSI: %s found in slot %d, io=0x%x, scsi id=%d,\n", subsys_list[i].description, slot + 1, port, id);
1704 if ((pos[2] & 0xf0) == 0xf0)
1705 printk(KERN_DEBUG " ROM Addr.=off,");
1706 else
1707 printk(KERN_DEBUG " ROM Addr.=0x%x,", ((pos[2] & 0xf0) << 13) + 0xc0000);
1708 printk(KERN_DEBUG " port-offset=0x%x, subsystem=%s\n", ((pos[2] & 0x0e) << 2), (pos[2] & 1) ? "enabled." : "disabled.");
1709
1710 /* register the hostadapter */
1711 if ((shpnt = ibmmca_register(scsi_template, port, id, i, subsys_list[i].description))) {
1712 for (k = 2; k < 7; k++)
1713 ((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k] = pos[k];
1714 ((struct ibmmca_hostdata *) shpnt->hostdata)->_special = i;
1715 mca_set_adapter_name(slot, subsys_list[i].description);
1716 mca_set_adapter_procfn(slot, (MCA_ProcFn) ibmmca_getinfo, shpnt);
1717 mca_mark_as_used(slot);
1718 if ((i == IBM_SCSI2_FW) && (pos[4] & 0x01) && (pos[6] == 0))
1719 devices_on_irq_11++;
1720 else
1721 devices_on_irq_14++;
1722 }
1723 slot++; /* advance to next slot */
1724 } /* advance to next adapter id in the list of IBM-SCSI-subsystems */
1725 }
1726 if (IRQ11_registered && !devices_on_irq_11)
1727 free_irq(IM_IRQ_FW, hosts); /* no devices on IRQ 11 */
1728 if (IRQ14_registered && !devices_on_irq_14)
1729 free_irq(IM_IRQ, hosts); /* no devices on IRQ 14 */
1730 if (!devices_on_irq_11 && !devices_on_irq_14)
1731 printk(KERN_WARNING "IBM MCA SCSI: No IBM SCSI-subsystem adapter attached.\n");
1732 return found; /* return the number of found SCSI hosts. Should be 1 or 0. */
1733 }
1734
1735 static struct Scsi_Host *ibmmca_register(struct scsi_host_template * scsi_template, int port, int id, int adaptertype, char *hostname)
1736 {
1737 struct Scsi_Host *shpnt;
1738 int i, j;
1739 unsigned int ctrl;
1740
1741 /* check I/O region */
1742 if (!request_region(port, IM_N_IO_PORT, hostname)) {
1743 printk(KERN_ERR "IBM MCA SCSI: Unable to get I/O region 0x%x-0x%x (%d ports).\n", port, port + IM_N_IO_PORT - 1, IM_N_IO_PORT);
1744 return NULL;
1745 }
1746
1747 /* register host */
1748 shpnt = scsi_register(scsi_template, sizeof(struct ibmmca_hostdata));
1749 if (!shpnt) {
1750 printk(KERN_ERR "IBM MCA SCSI: Unable to register host.\n");
1751 release_region(port, IM_N_IO_PORT);
1752 return NULL;
1753 }
1754
1755 /* request I/O region */
1756 hosts[found] = shpnt; /* add new found hostadapter to the list */
1757 special(found) = adaptertype; /* important assignment or else crash! */
1758 subsystem_connector_size(found) = 0; /* preset slot-size */
1759 shpnt->irq = IM_IRQ; /* assign necessary stuff for the adapter */
1760 shpnt->io_port = port;
1761 shpnt->n_io_port = IM_N_IO_PORT;
1762 shpnt->this_id = id;
1763 shpnt->max_id = 8; /* 8 PUNs are default */
1764 /* now, the SCSI-subsystem is connected to Linux */
1765
1766 ctrl = (unsigned int) (inb(IM_CTR_REG(found))); /* get control-register status */
1767 #ifdef IM_DEBUG_PROBE
1768 printk("IBM MCA SCSI: Control Register contents: %x, status: %x\n", ctrl, inb(IM_STAT_REG(found)));
1769 printk("IBM MCA SCSI: This adapters' POS-registers: ");
1770 for (i = 0; i < 8; i++)
1771 printk("%x ", pos[i]);
1772 printk("\n");
1773 #endif
1774 reset_status(found) = IM_RESET_NOT_IN_PROGRESS;
1775
1776 for (i = 0; i < 16; i++) /* reset the tables */
1777 for (j = 0; j < 8; j++)
1778 get_ldn(found)[i][j] = MAX_LOG_DEV;
1779
1780 /* check which logical devices exist */
1781 /* after this line, local interrupting is possible: */
1782 local_checking_phase_flag(found) = 1;
1783 check_devices(found, adaptertype); /* call by value, using the global variable hosts */
1784 local_checking_phase_flag(found) = 0;
1785 found++; /* now increase index to be prepared for next found subsystem */
1786 /* an ibm mca subsystem has been detected */
1787 return shpnt;
1788 }
1789
1790 static int ibmmca_release(struct Scsi_Host *shpnt)
1791 {
1792 release_region(shpnt->io_port, shpnt->n_io_port);
1793 if (!(--found))
1794 free_irq(shpnt->irq, hosts);
1795 return 0;
1796 }
1797
1798 /* The following routine is the SCSI command queue for the midlevel driver */
1799 static int ibmmca_queuecommand(Scsi_Cmnd * cmd, void (*done) (Scsi_Cmnd *))
1800 {
1801 unsigned int ldn;
1802 unsigned int scsi_cmd;
1803 struct im_scb *scb;
1804 struct Scsi_Host *shpnt;
1805 int current_ldn;
1806 int id, lun;
1807 int target;
1808 int host_index;
1809 int max_pun;
1810 int i;
1811 struct scatterlist *sl;
1812
1813 shpnt = cmd->device->host;
1814 /* search for the right hostadapter */
1815 for (host_index = 0; hosts[host_index] && hosts[host_index]->host_no != shpnt->host_no; host_index++);
1816
1817 if (!hosts[host_index]) { /* invalid hostadapter descriptor address */
1818 cmd->result = DID_NO_CONNECT << 16;
1819 if (done)
1820 done(cmd);
1821 return 0;
1822 }
1823 max_pun = subsystem_maxid(host_index);
1824 if (ibm_ansi_order) {
1825 target = max_pun - 1 - cmd->device->id;
1826 if ((target <= subsystem_pun(host_index)) && (cmd->device->id <= subsystem_pun(host_index)))
1827 target--;
1828 else if ((target >= subsystem_pun(host_index)) && (cmd->device->id >= subsystem_pun(host_index)))
1829 target++;
1830 } else
1831 target = cmd->device->id;
1832
1833 /* if (target,lun) is NO LUN or not existing at all, return error */
1834 if ((get_scsi(host_index)[target][cmd->device->lun] == TYPE_NO_LUN) || (get_scsi(host_index)[target][cmd->device->lun] == TYPE_NO_DEVICE)) {
1835 cmd->result = DID_NO_CONNECT << 16;
1836 if (done)
1837 done(cmd);
1838 return 0;
1839 }
1840
1841 /*if (target,lun) unassigned, do further checks... */
1842 ldn = get_ldn(host_index)[target][cmd->device->lun];
1843 if (ldn >= MAX_LOG_DEV) { /* on invalid ldn do special stuff */
1844 if (ldn > MAX_LOG_DEV) { /* dynamical remapping if ldn unassigned */
1845 current_ldn = next_ldn(host_index); /* stop-value for one circle */
1846 while (ld(host_index)[next_ldn(host_index)].cmd) { /* search for a occupied, but not in */
1847 /* command-processing ldn. */
1848 next_ldn(host_index)++;
1849 if (next_ldn(host_index) >= MAX_LOG_DEV)
1850 next_ldn(host_index) = 7;
1851 if (current_ldn == next_ldn(host_index)) { /* One circle done ? */
1852 /* no non-processing ldn found */
1853 scmd_printk(KERN_WARNING, cmd,
1854 "IBM MCA SCSI: Cannot assign SCSI-device dynamically!\n"
1855 " On ldn 7-14 SCSI-commands everywhere in progress.\n"
1856 " Reporting DID_NO_CONNECT for device.\n");
1857 cmd->result = DID_NO_CONNECT << 16; /* return no connect */
1858 if (done)
1859 done(cmd);
1860 return 0;
1861 }
1862 }
1863
1864 /* unmap non-processing ldn */
1865 for (id = 0; id < max_pun; id++)
1866 for (lun = 0; lun < 8; lun++) {
1867 if (get_ldn(host_index)[id][lun] == next_ldn(host_index)) {
1868 get_ldn(host_index)[id][lun] = TYPE_NO_DEVICE;
1869 get_scsi(host_index)[id][lun] = TYPE_NO_DEVICE;
1870 /* unmap entry */
1871 }
1872 }
1873 /* set reduced interrupt_handler-mode for checking */
1874 local_checking_phase_flag(host_index) = 1;
1875 /* map found ldn to pun,lun */
1876 get_ldn(host_index)[target][cmd->device->lun] = next_ldn(host_index);
1877 /* change ldn to the right value, that is now next_ldn */
1878 ldn = next_ldn(host_index);
1879 /* unassign all ldns (pun,lun,ldn does not matter for remove) */
1880 immediate_assign(host_index, 0, 0, 0, REMOVE_LDN);
1881 /* set only LDN for remapped device */
1882 immediate_assign(host_index, target, cmd->device->lun, ldn, SET_LDN);
1883 /* get device information for ld[ldn] */
1884 if (device_exists(host_index, ldn, &ld(host_index)[ldn].block_length, &ld(host_index)[ldn].device_type)) {
1885 ld(host_index)[ldn].cmd = NULL; /* To prevent panic set 0, because
1886 devices that were not assigned,
1887 should have nothing in progress. */
1888 get_scsi(host_index)[target][cmd->device->lun] = ld(host_index)[ldn].device_type;
1889 /* increase assignment counters for statistics in /proc */
1890 IBM_DS(host_index).dynamical_assignments++;
1891 IBM_DS(host_index).ldn_assignments[ldn]++;
1892 } else
1893 /* panic here, because a device, found at boottime has
1894 vanished */
1895 panic("IBM MCA SCSI: ldn=0x%x, SCSI-device on (%d,%d) vanished!\n", ldn, target, cmd->device->lun);
1896 /* unassign again all ldns (pun,lun,ldn does not matter for remove) */
1897 immediate_assign(host_index, 0, 0, 0, REMOVE_LDN);
1898 /* remap all ldns, as written in the pun/lun table */
1899 lun = 0;
1900 #ifdef CONFIG_SCSI_MULTI_LUN
1901 for (lun = 0; lun < 8; lun++)
1902 #endif
1903 for (id = 0; id < max_pun; id++) {
1904 if (get_ldn(host_index)[id][lun] <= MAX_LOG_DEV)
1905 immediate_assign(host_index, id, lun, get_ldn(host_index)[id][lun], SET_LDN);
1906 }
1907 /* set back to normal interrupt_handling */
1908 local_checking_phase_flag(host_index) = 0;
1909 #ifdef IM_DEBUG_PROBE
1910 /* Information on syslog terminal */
1911 printk("IBM MCA SCSI: ldn=0x%x dynamically reassigned to (%d,%d).\n", ldn, target, cmd->device->lun);
1912 #endif
1913 /* increase next_ldn for next dynamical assignment */
1914 next_ldn(host_index)++;
1915 if (next_ldn(host_index) >= MAX_LOG_DEV)
1916 next_ldn(host_index) = 7;
1917 } else { /* wall against Linux accesses to the subsystem adapter */
1918 cmd->result = DID_BAD_TARGET << 16;
1919 if (done)
1920 done(cmd);
1921 return 0;
1922 }
1923 }
1924
1925 /*verify there is no command already in progress for this log dev */
1926 if (ld(host_index)[ldn].cmd)
1927 panic("IBM MCA SCSI: cmd already in progress for this ldn.\n");
1928
1929 /*save done in cmd, and save cmd for the interrupt handler */
1930 cmd->scsi_done = done;
1931 ld(host_index)[ldn].cmd = cmd;
1932
1933 /*fill scb information independent of the scsi command */
1934 scb = &(ld(host_index)[ldn].scb);
1935 ld(host_index)[ldn].tsb.dev_status = 0;
1936 scb->enable = IM_REPORT_TSB_ONLY_ON_ERROR | IM_RETRY_ENABLE;
1937 scb->tsb_adr = isa_virt_to_bus(&(ld(host_index)[ldn].tsb));
1938 scsi_cmd = cmd->cmnd[0];
1939
1940 if (cmd->use_sg) {
1941 i = cmd->use_sg;
1942 sl = (struct scatterlist *) (cmd->request_buffer);
1943 if (i > 16)
1944 panic("IBM MCA SCSI: scatter-gather list too long.\n");
1945 while (--i >= 0) {
1946 ld(host_index)[ldn].sge[i].address = (void *) (isa_page_to_bus(sl[i].page) + sl[i].offset);
1947 ld(host_index)[ldn].sge[i].byte_length = sl[i].length;
1948 }
1949 scb->enable |= IM_POINTER_TO_LIST;
1950 scb->sys_buf_adr = isa_virt_to_bus(&(ld(host_index)[ldn].sge[0]));
1951 scb->sys_buf_length = cmd->use_sg * sizeof(struct im_sge);
1952 } else {
1953 scb->sys_buf_adr = isa_virt_to_bus(cmd->request_buffer);
1954 /* recent Linux midlevel SCSI places 1024 byte for inquiry
1955 * command. Far too much for old PS/2 hardware. */
1956 switch (scsi_cmd) {
1957 /* avoid command errors by setting bufferlengths to
1958 * ANSI-standard. Beware of forcing it to 255,
1959 * this could SEGV the kernel!!! */
1960 case INQUIRY:
1961 case REQUEST_SENSE:
1962 case MODE_SENSE:
1963 case MODE_SELECT:
1964 if (cmd->request_bufflen > 255)
1965 scb->sys_buf_length = 255;
1966 else
1967 scb->sys_buf_length = cmd->request_bufflen;
1968 break;
1969 case TEST_UNIT_READY:
1970 scb->sys_buf_length = 0;
1971 break;
1972 default:
1973 scb->sys_buf_length = cmd->request_bufflen;
1974 break;
1975 }
1976 }
1977 /*fill scb information dependent on scsi command */
1978
1979 #ifdef IM_DEBUG_CMD
1980 printk("issue scsi cmd=%02x to ldn=%d\n", scsi_cmd, ldn);
1981 #endif
1982
1983 /* for specific device-type debugging: */
1984 #ifdef IM_DEBUG_CMD_SPEC_DEV
1985 if (ld(host_index)[ldn].device_type == IM_DEBUG_CMD_DEVICE)
1986 printk("(SCSI-device-type=0x%x) issue scsi cmd=%02x to ldn=%d\n", ld(host_index)[ldn].device_type, scsi_cmd, ldn);
1987 #endif
1988
1989 /* for possible panics store current command */
1990 last_scsi_command(host_index)[ldn] = scsi_cmd;
1991 last_scsi_type(host_index)[ldn] = IM_SCB;
1992 /* update statistical info */
1993 IBM_DS(host_index).total_accesses++;
1994 IBM_DS(host_index).ldn_access[ldn]++;
1995
1996 switch (scsi_cmd) {
1997 case READ_6:
1998 case WRITE_6:
1999 case READ_10:
2000 case WRITE_10:
2001 case READ_12:
2002 case WRITE_12:
2003 /* Distinguish between disk and other devices. Only disks (that are the
2004 most frequently accessed devices) should be supported by the
2005 IBM-SCSI-Subsystem commands. */
2006 switch (ld(host_index)[ldn].device_type) {
2007 case TYPE_DISK: /* for harddisks enter here ... */
2008 case TYPE_MOD: /* ... try it also for MO-drives (send flames as */
2009 /* you like, if this won't work.) */
2010 if (scsi_cmd == READ_6 || scsi_cmd == READ_10 || scsi_cmd == READ_12) {
2011 /* read command preparations */
2012 scb->enable |= IM_READ_CONTROL;
2013 IBM_DS(host_index).ldn_read_access[ldn]++; /* increase READ-access on ldn stat. */
2014 scb->command = IM_READ_DATA_CMD | IM_NO_DISCONNECT;
2015 } else { /* write command preparations */
2016 IBM_DS(host_index).ldn_write_access[ldn]++; /* increase write-count on ldn stat. */
2017 scb->command = IM_WRITE_DATA_CMD | IM_NO_DISCONNECT;
2018 }
2019 if (scsi_cmd == READ_6 || scsi_cmd == WRITE_6) {
2020 scb->u1.log_blk_adr = (((unsigned) cmd->cmnd[3]) << 0) | (((unsigned) cmd->cmnd[2]) << 8) | ((((unsigned) cmd->cmnd[1]) & 0x1f) << 16);
2021 scb->u2.blk.count = (unsigned) cmd->cmnd[4];
2022 } else {
2023 scb->u1.log_blk_adr = (((unsigned) cmd->cmnd[5]) << 0) | (((unsigned) cmd->cmnd[4]) << 8) | (((unsigned) cmd->cmnd[3]) << 16) | (((unsigned) cmd->cmnd[2]) << 24);
2024 scb->u2.blk.count = (((unsigned) cmd->cmnd[8]) << 0) | (((unsigned) cmd->cmnd[7]) << 8);
2025 }
2026 last_scsi_logical_block(host_index)[ldn] = scb->u1.log_blk_adr;
2027 last_scsi_blockcount(host_index)[ldn] = scb->u2.blk.count;
2028 scb->u2.blk.length = ld(host_index)[ldn].block_length;
2029 break;
2030 /* for other devices, enter here. Other types are not known by
2031 Linux! TYPE_NO_LUN is forbidden as valid device. */
2032 case TYPE_ROM:
2033 case TYPE_TAPE:
2034 case TYPE_PROCESSOR:
2035 case TYPE_WORM:
2036 case TYPE_SCANNER:
2037 case TYPE_MEDIUM_CHANGER:
2038 /* If there is a sequential-device, IBM recommends to use
2039 IM_OTHER_SCSI_CMD_CMD instead of subsystem READ/WRITE.
2040 This includes CD-ROM devices, too, due to the partial sequential
2041 read capabilities. */
2042 scb->command = IM_OTHER_SCSI_CMD_CMD;
2043 if (scsi_cmd == READ_6 || scsi_cmd == READ_10 || scsi_cmd == READ_12)
2044 /* enable READ */
2045 scb->enable |= IM_READ_CONTROL;
2046 scb->enable |= IM_BYPASS_BUFFER;
2047 scb->u1.scsi_cmd_length = cmd->cmd_len;
2048 memcpy(scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len);
2049 last_scsi_type(host_index)[ldn] = IM_LONG_SCB;
2050 /* Read/write on this non-disk devices is also displayworthy,
2051 so flash-up the LED/display. */
2052 break;
2053 }
2054 break;
2055 case INQUIRY:
2056 IBM_DS(host_index).ldn_inquiry_access[ldn]++;
2057 scb->command = IM_DEVICE_INQUIRY_CMD;
2058 scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER;
2059 scb->u1.log_blk_adr = 0;
2060 break;
2061 case TEST_UNIT_READY:
2062 scb->command = IM_OTHER_SCSI_CMD_CMD;
2063 scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER;
2064 scb->u1.log_blk_adr = 0;
2065 scb->u1.scsi_cmd_length = 6;
2066 memcpy(scb->u2.scsi_command, cmd->cmnd, 6);
2067 last_scsi_type(host_index)[ldn] = IM_LONG_SCB;
2068 break;
2069 case READ_CAPACITY:
2070 /* the length of system memory buffer must be exactly 8 bytes */
2071 scb->command = IM_READ_CAPACITY_CMD;
2072 scb->enable |= IM_READ_CONTROL | IM_BYPASS_BUFFER;
2073 if (scb->sys_buf_length > 8)
2074 scb->sys_buf_length = 8;
2075 break;
2076 /* Commands that need read-only-mode (system <- device): */
2077 case REQUEST_SENSE:
2078 scb->command = IM_REQUEST_SENSE_CMD;
2079 scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER;
2080 break;
2081 /* Commands that need write-only-mode (system -> device): */
2082 case MODE_SELECT:
2083 case MODE_SELECT_10:
2084 IBM_DS(host_index).ldn_modeselect_access[ldn]++;
2085 scb->command = IM_OTHER_SCSI_CMD_CMD;
2086 scb->enable |= IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER; /*Select needs WRITE-enabled */
2087 scb->u1.scsi_cmd_length = cmd->cmd_len;
2088 memcpy(scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len);
2089 last_scsi_type(host_index)[ldn] = IM_LONG_SCB;
2090 break;
2091 /* For other commands, read-only is useful. Most other commands are
2092 running without an input-data-block. */
2093 default:
2094 scb->command = IM_OTHER_SCSI_CMD_CMD;
2095 scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER;
2096 scb->u1.scsi_cmd_length = cmd->cmd_len;
2097 memcpy(scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len);
2098 last_scsi_type(host_index)[ldn] = IM_LONG_SCB;
2099 break;
2100 }
2101 /*issue scb command, and return */
2102 if (++disk_rw_in_progress == 1)
2103 PS2_DISK_LED_ON(shpnt->host_no, target);
2104
2105 if (last_scsi_type(host_index)[ldn] == IM_LONG_SCB) {
2106 issue_cmd(host_index, isa_virt_to_bus(scb), IM_LONG_SCB | ldn);
2107 IBM_DS(host_index).long_scbs++;
2108 } else {
2109 issue_cmd(host_index, isa_virt_to_bus(scb), IM_SCB | ldn);
2110 IBM_DS(host_index).scbs++;
2111 }
2112 return 0;
2113 }
2114
2115 static int __ibmmca_abort(Scsi_Cmnd * cmd)
2116 {
2117 /* Abort does not work, as the adapter never generates an interrupt on
2118 * whatever situation is simulated, even when really pending commands
2119 * are running on the adapters' hardware ! */
2120
2121 struct Scsi_Host *shpnt;
2122 unsigned int ldn;
2123 void (*saved_done) (Scsi_Cmnd *);
2124 int target;
2125 int host_index;
2126 int max_pun;
2127 unsigned long imm_command;
2128
2129 #ifdef IM_DEBUG_PROBE
2130 printk("IBM MCA SCSI: Abort subroutine called...\n");
2131 #endif
2132
2133 shpnt = cmd->device->host;
2134 /* search for the right hostadapter */
2135 for (host_index = 0; hosts[host_index] && hosts[host_index]->host_no != shpnt->host_no; host_index++);
2136
2137 if (!hosts[host_index]) { /* invalid hostadapter descriptor address */
2138 cmd->result = DID_NO_CONNECT << 16;
2139 if (cmd->scsi_done)
2140 (cmd->scsi_done) (cmd);
2141 shpnt = cmd->device->host;
2142 #ifdef IM_DEBUG_PROBE
2143 printk(KERN_DEBUG "IBM MCA SCSI: Abort adapter selection failed!\n");
2144 #endif
2145 return SUCCESS;
2146 }
2147 max_pun = subsystem_maxid(host_index);
2148 if (ibm_ansi_order) {
2149 target = max_pun - 1 - cmd->device->id;
2150 if ((target <= subsystem_pun(host_index)) && (cmd->device->id <= subsystem_pun(host_index)))
2151 target--;
2152 else if ((target >= subsystem_pun(host_index)) && (cmd->device->id >= subsystem_pun(host_index)))
2153 target++;
2154 } else
2155 target = cmd->device->id;
2156
2157 /* get logical device number, and disable system interrupts */
2158 printk(KERN_WARNING "IBM MCA SCSI: Sending abort to device pun=%d, lun=%d.\n", target, cmd->device->lun);
2159 ldn = get_ldn(host_index)[target][cmd->device->lun];
2160
2161 /*if cmd for this ldn has already finished, no need to abort */
2162 if (!ld(host_index)[ldn].cmd) {
2163 return SUCCESS;
2164 }
2165
2166 /* Clear ld.cmd, save done function, install internal done,
2167 * send abort immediate command (this enables sys. interrupts),
2168 * and wait until the interrupt arrives.
2169 */
2170 saved_done = cmd->scsi_done;
2171 cmd->scsi_done = internal_done;
2172 cmd->SCp.Status = 0;
2173 last_scsi_command(host_index)[ldn] = IM_ABORT_IMM_CMD;
2174 last_scsi_type(host_index)[ldn] = IM_IMM_CMD;
2175 imm_command = inl(IM_CMD_REG(host_index));
2176 imm_command &= (unsigned long) (0xffff0000); /* mask reserved stuff */
2177 imm_command |= (unsigned long) (IM_ABORT_IMM_CMD);
2178 /* must wait for attention reg not busy */
2179 /* FIXME - timeout, politeness */
2180 while (1) {
2181 if (!(inb(IM_STAT_REG(host_index)) & IM_BUSY))
2182 break;
2183 }
2184 /* write registers and enable system interrupts */
2185 outl(imm_command, IM_CMD_REG(host_index));
2186 outb(IM_IMM_CMD | ldn, IM_ATTN_REG(host_index));
2187 #ifdef IM_DEBUG_PROBE
2188 printk("IBM MCA SCSI: Abort queued to adapter...\n");
2189 #endif
2190 spin_unlock_irq(shpnt->host_lock);
2191 while (!cmd->SCp.Status)
2192 yield();
2193 spin_lock_irq(shpnt->host_lock);
2194 cmd->scsi_done = saved_done;
2195 #ifdef IM_DEBUG_PROBE
2196 printk("IBM MCA SCSI: Abort returned with adapter response...\n");
2197 #endif
2198
2199 /*if abort went well, call saved done, then return success or error */
2200 if (cmd->result == (DID_ABORT << 16))
2201 {
2202 cmd->result |= DID_ABORT << 16;
2203 if (cmd->scsi_done)
2204 (cmd->scsi_done) (cmd);
2205 ld(host_index)[ldn].cmd = NULL;
2206 #ifdef IM_DEBUG_PROBE
2207 printk("IBM MCA SCSI: Abort finished with success.\n");
2208 #endif
2209 return SUCCESS;
2210 } else {
2211 cmd->result |= DID_NO_CONNECT << 16;
2212 if (cmd->scsi_done)
2213 (cmd->scsi_done) (cmd);
2214 ld(host_index)[ldn].cmd = NULL;
2215 #ifdef IM_DEBUG_PROBE
2216 printk("IBM MCA SCSI: Abort failed.\n");
2217 #endif
2218 return FAILED;
2219 }
2220 }
2221
2222 static int ibmmca_abort(Scsi_Cmnd * cmd)
2223 {
2224 struct Scsi_Host *shpnt = cmd->device->host;
2225 int rc;
2226
2227 spin_lock_irq(shpnt->host_lock);
2228 rc = __ibmmca_abort(cmd);
2229 spin_unlock_irq(shpnt->host_lock);
2230
2231 return rc;
2232 }
2233
2234 static int __ibmmca_host_reset(Scsi_Cmnd * cmd)
2235 {
2236 struct Scsi_Host *shpnt;
2237 Scsi_Cmnd *cmd_aid;
2238 int ticks, i;
2239 int host_index;
2240 unsigned long imm_command;
2241
2242 BUG_ON(cmd == NULL);
2243
2244 ticks = IM_RESET_DELAY * HZ;
2245 shpnt = cmd->device->host;
2246 /* search for the right hostadapter */
2247 for (host_index = 0; hosts[host_index] && hosts[host_index]->host_no != shpnt->host_no; host_index++);
2248
2249 if (!hosts[host_index]) /* invalid hostadapter descriptor address */
2250 return FAILED;
2251
2252 if (local_checking_phase_flag(host_index)) {
2253 printk(KERN_WARNING "IBM MCA SCSI: unable to reset while checking devices.\n");
2254 return FAILED;
2255 }
2256
2257 /* issue reset immediate command to subsystem, and wait for interrupt */
2258 printk("IBM MCA SCSI: resetting all devices.\n");
2259 reset_status(host_index) = IM_RESET_IN_PROGRESS;
2260 last_scsi_command(host_index)[0xf] = IM_RESET_IMM_CMD;
2261 last_scsi_type(host_index)[0xf] = IM_IMM_CMD;
2262 imm_command = inl(IM_CMD_REG(host_index));
2263 imm_command &= (unsigned long) (0xffff0000); /* mask reserved stuff */
2264 imm_command |= (unsigned long) (IM_RESET_IMM_CMD);
2265 /* must wait for attention reg not busy */
2266 while (1) {
2267 if (!(inb(IM_STAT_REG(host_index)) & IM_BUSY))
2268 break;
2269 spin_unlock_irq(shpnt->host_lock);
2270 yield();
2271 spin_lock_irq(shpnt->host_lock);
2272 }
2273 /*write registers and enable system interrupts */
2274 outl(imm_command, IM_CMD_REG(host_index));
2275 outb(IM_IMM_CMD | 0xf, IM_ATTN_REG(host_index));
2276 /* wait for interrupt finished or intr_stat register to be set, as the
2277 * interrupt will not be executed, while we are in here! */
2278
2279 /* FIXME: This is really really icky we so want a sleeping version of this ! */
2280 while (reset_status(host_index) == IM_RESET_IN_PROGRESS && --ticks && ((inb(IM_INTR_REG(host_index)) & 0x8f) != 0x8f)) {
2281 udelay((1 + 999 / HZ) * 1000);
2282 barrier();
2283 }
2284 /* if reset did not complete, just return an error */
2285 if (!ticks) {
2286 printk(KERN_ERR "IBM MCA SCSI: reset did not complete within %d seconds.\n", IM_RESET_DELAY);
2287 reset_status(host_index) = IM_RESET_FINISHED_FAIL;
2288 return FAILED;
2289 }
2290
2291 if ((inb(IM_INTR_REG(host_index)) & 0x8f) == 0x8f) {
2292 /* analysis done by this routine and not by the intr-routine */
2293 if (inb(IM_INTR_REG(host_index)) == 0xaf)
2294 reset_status(host_index) = IM_RESET_FINISHED_OK_NO_INT;
2295 else if (inb(IM_INTR_REG(host_index)) == 0xcf)
2296 reset_status(host_index) = IM_RESET_FINISHED_FAIL;
2297 else /* failed, 4get it */
2298 reset_status(host_index) = IM_RESET_NOT_IN_PROGRESS_NO_INT;
2299 outb(IM_EOI | 0xf, IM_ATTN_REG(host_index));
2300 }
2301
2302 /* if reset failed, just return an error */
2303 if (reset_status(host_index) == IM_RESET_FINISHED_FAIL) {
2304 printk(KERN_ERR "IBM MCA SCSI: reset failed.\n");
2305 return FAILED;
2306 }
2307
2308 /* so reset finished ok - call outstanding done's, and return success */
2309 printk(KERN_INFO "IBM MCA SCSI: Reset successfully completed.\n");
2310 for (i = 0; i < MAX_LOG_DEV; i++) {
2311 cmd_aid = ld(host_index)[i].cmd;
2312 if (cmd_aid && cmd_aid->scsi_done) {
2313 ld(host_index)[i].cmd = NULL;
2314 cmd_aid->result = DID_RESET << 16;
2315 }
2316 }
2317 return SUCCESS;
2318 }
2319
2320 static int ibmmca_host_reset(Scsi_Cmnd * cmd)
2321 {
2322 struct Scsi_Host *shpnt = cmd->device->host;
2323 int rc;
2324
2325 spin_lock_irq(shpnt->host_lock);
2326 rc = __ibmmca_host_reset(cmd);
2327 spin_unlock_irq(shpnt->host_lock);
2328
2329 return rc;
2330 }
2331
2332 static int ibmmca_biosparam(struct scsi_device *sdev, struct block_device *bdev, sector_t capacity, int *info)
2333 {
2334 int size = capacity;
2335 info[0] = 64;
2336 info[1] = 32;
2337 info[2] = size / (info[0] * info[1]);
2338 if (info[2] >= 1024) {
2339 info[0] = 128;
2340 info[1] = 63;
2341 info[2] = size / (info[0] * info[1]);
2342 if (info[2] >= 1024) {
2343 info[0] = 255;
2344 info[1] = 63;
2345 info[2] = size / (info[0] * info[1]);
2346 if (info[2] >= 1024)
2347 info[2] = 1023;
2348 }
2349 }
2350 return 0;
2351 }
2352
2353 /* calculate percentage of total accesses on a ldn */
2354 static int ldn_access_load(int host_index, int ldn)
2355 {
2356 if (IBM_DS(host_index).total_accesses == 0)
2357 return (0);
2358 if (IBM_DS(host_index).ldn_access[ldn] == 0)
2359 return (0);
2360 return (IBM_DS(host_index).ldn_access[ldn] * 100) / IBM_DS(host_index).total_accesses;
2361 }
2362
2363 /* calculate total amount of r/w-accesses */
2364 static int ldn_access_total_read_write(int host_index)
2365 {
2366 int a;
2367 int i;
2368
2369 a = 0;
2370 for (i = 0; i <= MAX_LOG_DEV; i++)
2371 a += IBM_DS(host_index).ldn_read_access[i] + IBM_DS(host_index).ldn_write_access[i];
2372 return (a);
2373 }
2374
2375 static int ldn_access_total_inquiry(int host_index)
2376 {
2377 int a;
2378 int i;
2379
2380 a = 0;
2381 for (i = 0; i <= MAX_LOG_DEV; i++)
2382 a += IBM_DS(host_index).ldn_inquiry_access[i];
2383 return (a);
2384 }
2385
2386 static int ldn_access_total_modeselect(int host_index)
2387 {
2388 int a;
2389 int i;
2390
2391 a = 0;
2392 for (i = 0; i <= MAX_LOG_DEV; i++)
2393 a += IBM_DS(host_index).ldn_modeselect_access[i];
2394 return (a);
2395 }
2396
2397 /* routine to display info in the proc-fs-structure (a deluxe feature) */
2398 static int ibmmca_proc_info(struct Scsi_Host *shpnt, char *buffer, char **start, off_t offset, int length, int inout)
2399 {
2400 int len = 0;
2401 int i, id, lun, host_index;
2402 unsigned long flags;
2403 int max_pun;
2404
2405 for (i = 0; hosts[i] && hosts[i] != shpnt; i++);
2406
2407 spin_lock_irqsave(hosts[i]->host_lock, flags); /* Check it */
2408 host_index = i;
2409 if (!shpnt) {
2410 len += sprintf(buffer + len, "\nIBM MCA SCSI: Can't find adapter");
2411 return len;
2412 }
2413 max_pun = subsystem_maxid(host_index);
2414
2415 len += sprintf(buffer + len, "\n IBM-SCSI-Subsystem-Linux-Driver, Version %s\n\n\n", IBMMCA_SCSI_DRIVER_VERSION);
2416 len += sprintf(buffer + len, " SCSI Access-Statistics:\n");
2417 len += sprintf(buffer + len, " Device Scanning Order....: %s\n", (ibm_ansi_order) ? "IBM/ANSI" : "New Industry Standard");
2418 #ifdef CONFIG_SCSI_MULTI_LUN
2419 len += sprintf(buffer + len, " Multiple LUN probing.....: Yes\n");
2420 #else
2421 len += sprintf(buffer + len, " Multiple LUN probing.....: No\n");
2422 #endif
2423 len += sprintf(buffer + len, " This Hostnumber..........: %d\n", shpnt->host_no);
2424 len += sprintf(buffer + len, " Base I/O-Port............: 0x%x\n", (unsigned int) (IM_CMD_REG(host_index)));
2425 len += sprintf(buffer + len, " (Shared) IRQ.............: %d\n", IM_IRQ);
2426 len += sprintf(buffer + len, " Total Interrupts.........: %d\n", IBM_DS(host_index).total_interrupts);
2427 len += sprintf(buffer + len, " Total SCSI Accesses......: %d\n", IBM_DS(host_index).total_accesses);
2428 len += sprintf(buffer + len, " Total short SCBs.........: %d\n", IBM_DS(host_index).scbs);
2429 len += sprintf(buffer + len, " Total long SCBs..........: %d\n", IBM_DS(host_index).long_scbs);
2430 len += sprintf(buffer + len, " Total SCSI READ/WRITE..: %d\n", ldn_access_total_read_write(host_index));
2431 len += sprintf(buffer + len, " Total SCSI Inquiries...: %d\n", ldn_access_total_inquiry(host_index));
2432 len += sprintf(buffer + len, " Total SCSI Modeselects.: %d\n", ldn_access_total_modeselect(host_index));
2433 len += sprintf(buffer + len, " Total SCSI other cmds..: %d\n", IBM_DS(host_index).total_accesses - ldn_access_total_read_write(host_index)
2434 - ldn_access_total_modeselect(host_index)
2435 - ldn_access_total_inquiry(host_index));
2436 len += sprintf(buffer + len, " Total SCSI command fails.: %d\n\n", IBM_DS(host_index).total_errors);
2437 len += sprintf(buffer + len, " Logical-Device-Number (LDN) Access-Statistics:\n");
2438 len += sprintf(buffer + len, " LDN | Accesses [%%] | READ | WRITE | ASSIGNMENTS\n");
2439 len += sprintf(buffer + len, " -----|--------------|-----------|-----------|--------------\n");
2440 for (i = 0; i <= MAX_LOG_DEV; i++)
2441 len += sprintf(buffer + len, " %2X | %3d | %8d | %8d | %8d\n", i, ldn_access_load(host_index, i), IBM_DS(host_index).ldn_read_access[i], IBM_DS(host_index).ldn_write_access[i], IBM_DS(host_index).ldn_assignments[i]);
2442 len += sprintf(buffer + len, " -----------------------------------------------------------\n\n");
2443 len += sprintf(buffer + len, " Dynamical-LDN-Assignment-Statistics:\n");
2444 len += sprintf(buffer + len, " Number of physical SCSI-devices..: %d (+ Adapter)\n", IBM_DS(host_index).total_scsi_devices);
2445 len += sprintf(buffer + len, " Dynamical Assignment necessary...: %s\n", IBM_DS(host_index).dyn_flag ? "Yes" : "No ");
2446 len += sprintf(buffer + len, " Next LDN to be assigned..........: 0x%x\n", next_ldn(host_index));
2447 len += sprintf(buffer + len, " Dynamical assignments done yet...: %d\n", IBM_DS(host_index).dynamical_assignments);
2448 len += sprintf(buffer + len, "\n Current SCSI-Device-Mapping:\n");
2449 len += sprintf(buffer + len, " Physical SCSI-Device Map Logical SCSI-Device Map\n");
2450 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");
2451 for (id = 0; id < max_pun; id++) {
2452 len += sprintf(buffer + len, " %2d ", id);
2453 for (lun = 0; lun < 8; lun++)
2454 len += sprintf(buffer + len, "%2s ", ti_p(get_scsi(host_index)[id][lun]));
2455 len += sprintf(buffer + len, " %2d ", id);
2456 for (lun = 0; lun < 8; lun++)
2457 len += sprintf(buffer + len, "%2s ", ti_l(get_ldn(host_index)[id][lun]));
2458 len += sprintf(buffer + len, "\n");
2459 }
2460
2461 len += sprintf(buffer + len, "(A = IBM-Subsystem, D = Harddisk, T = Tapedrive, P = Processor, W = WORM,\n");
2462 len += sprintf(buffer + len, " R = CD-ROM, S = Scanner, M = MO-Drive, C = Medium-Changer, + = unprovided LUN,\n");
2463 len += sprintf(buffer + len, " - = nothing found, nothing assigned or unprobed LUN)\n\n");
2464
2465 *start = buffer + offset;
2466 len -= offset;
2467 if (len > length)
2468 len = length;
2469 spin_unlock_irqrestore(shpnt->host_lock, flags);
2470 return len;
2471 }
2472
2473 static int option_setup(char *str)
2474 {
2475 int ints[IM_MAX_HOSTS];
2476 char *cur = str;
2477 int i = 1;
2478
2479 while (cur && isdigit(*cur) && i <= IM_MAX_HOSTS) {
2480 ints[i++] = simple_strtoul(cur, NULL, 0);
2481 if ((cur = strchr(cur, ',')) != NULL)
2482 cur++;
2483 }
2484 ints[0] = i - 1;
2485 internal_ibmmca_scsi_setup(cur, ints);
2486 return 1;
2487 }
2488
2489 __setup("ibmmcascsi=", option_setup);
2490
2491 static struct scsi_host_template driver_template = {
2492 .proc_name = "ibmmca",
2493 .proc_info = ibmmca_proc_info,
2494 .name = "IBM SCSI-Subsystem",
2495 .detect = ibmmca_detect,
2496 .release = ibmmca_release,
2497 .queuecommand = ibmmca_queuecommand,
2498 .eh_abort_handler = ibmmca_abort,
2499 .eh_host_reset_handler = ibmmca_host_reset,
2500 .bios_param = ibmmca_biosparam,
2501 .can_queue = 16,
2502 .this_id = 7,
2503 .sg_tablesize = 16,
2504 .cmd_per_lun = 1,
2505 .use_clustering = ENABLE_CLUSTERING,
2506 };
2507 #include "scsi_module.c"
Tomato firmware and modifications.