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[PATCH] radix-tree documentation cleanups
[linux-2.6/mini2440.git] / drivers / scsi / ibmmca.c
blob3a8462e8d06354e390de6921df07190fbaa4ce61
1 /*
2 Low Level Linux Driver for the IBM Microchannel SCSI Subsystem for
3 Linux Kernel >= 2.4.0.
4 Copyright (c) 1995 Strom Systems, Inc. under the terms of the GNU
5 General Public License. Written by Martin Kolinek, December 1995.
6 Further development by: Chris Beauregard, Klaus Kudielka, Michael Lang
7 See the file Documentation/scsi/ibmmca.txt for a detailed description
8 of this driver, the commandline arguments and the history of its
9 development.
10 See the WWW-page: http://www.uni-mainz.de/~langm000/linux.html for latest
11 updates, info and ADF-files for adapters supported by this driver.
12
13 Alan Cox <alan@redhat.com>
14 Updated for Linux 2.5.45 to use the new error handler, cleaned up the
15 lock macros and did a few unavoidable locking tweaks, plus one locking
16 fix in the irq and completion path.
17
18 */
19
20 #include <linux/config.h>
21 #include <linux/module.h>
22 #include <linux/kernel.h>
23 #include <linux/types.h>
24 #include <linux/ctype.h>
25 #include <linux/string.h>
26 #include <linux/interrupt.h>
27 #include <linux/ioport.h>
28 #include <linux/delay.h>
29 #include <linux/blkdev.h>
30 #include <linux/proc_fs.h>
31 #include <linux/stat.h>
32 #include <linux/mca.h>
33 #include <linux/spinlock.h>
34 #include <linux/init.h>
35 #include <linux/mca-legacy.h>
36
37 #include <asm/system.h>
38 #include <asm/io.h>
39
40 #include "scsi.h"
41 #include <scsi/scsi_host.h>
42 #include "ibmmca.h"
43
44 /* current version of this driver-source: */
45 #define IBMMCA_SCSI_DRIVER_VERSION "4.0b-ac"
46
47 /* driver configuration */
48 #define IM_MAX_HOSTS 8 /* maximum number of host adapters */
49 #define IM_RESET_DELAY 60 /* seconds allowed for a reset */
50
51 /* driver debugging - #undef all for normal operation */
52 /* if defined: count interrupts and ignore this special one: */
53 #undef IM_DEBUG_TIMEOUT //50
54 #define TIMEOUT_PUN 0
55 #define TIMEOUT_LUN 0
56 /* verbose interrupt: */
57 #undef IM_DEBUG_INT
58 /* verbose queuecommand: */
59 #undef IM_DEBUG_CMD
60 /* verbose queucommand for specific SCSI-device type: */
61 #undef IM_DEBUG_CMD_SPEC_DEV
62 /* verbose device probing */
63 #undef IM_DEBUG_PROBE
64
65 /* device type that shall be displayed on syslog (only during debugging): */
66 #define IM_DEBUG_CMD_DEVICE TYPE_TAPE
67
68 /* relative addresses of hardware registers on a subsystem */
69 #define IM_CMD_REG(hi) (hosts[(hi)]->io_port) /*Command Interface, (4 bytes long) */
70 #define IM_ATTN_REG(hi) (hosts[(hi)]->io_port+4) /*Attention (1 byte) */
71 #define IM_CTR_REG(hi) (hosts[(hi)]->io_port+5) /*Basic Control (1 byte) */
72 #define IM_INTR_REG(hi) (hosts[(hi)]->io_port+6) /*Interrupt Status (1 byte, r/o) */
73 #define IM_STAT_REG(hi) (hosts[(hi)]->io_port+7) /*Basic Status (1 byte, read only) */
74
75 /* basic I/O-port of first adapter */
76 #define IM_IO_PORT 0x3540
77 /* maximum number of hosts that can be found */
78 #define IM_N_IO_PORT 8
79
80 /*requests going into the upper nibble of the Attention register */
81 /*note: the lower nibble specifies the device(0-14), or subsystem(15) */
82 #define IM_IMM_CMD 0x10 /*immediate command */
83 #define IM_SCB 0x30 /*Subsystem Control Block command */
84 #define IM_LONG_SCB 0x40 /*long Subsystem Control Block command */
85 #define IM_EOI 0xe0 /*end-of-interrupt request */
86
87 /*values for bits 7,1,0 of Basic Control reg. (bits 6-2 reserved) */
88 #define IM_HW_RESET 0x80 /*hardware reset */
89 #define IM_ENABLE_DMA 0x02 /*enable subsystem's busmaster DMA */
90 #define IM_ENABLE_INTR 0x01 /*enable interrupts to the system */
91
92 /*to interpret the upper nibble of Interrupt Status register */
93 /*note: the lower nibble specifies the device(0-14), or subsystem(15) */
94 #define IM_SCB_CMD_COMPLETED 0x10
95 #define IM_SCB_CMD_COMPLETED_WITH_RETRIES 0x50
96 #define IM_LOOP_SCATTER_BUFFER_FULL 0x60
97 #define IM_ADAPTER_HW_FAILURE 0x70
98 #define IM_IMMEDIATE_CMD_COMPLETED 0xa0
99 #define IM_CMD_COMPLETED_WITH_FAILURE 0xc0
100 #define IM_CMD_ERROR 0xe0
101 #define IM_SOFTWARE_SEQUENCING_ERROR 0xf0
102
103 /*to interpret bits 3-0 of Basic Status register (bits 7-4 reserved) */
104 #define IM_CMD_REG_FULL 0x08
105 #define IM_CMD_REG_EMPTY 0x04
106 #define IM_INTR_REQUEST 0x02
107 #define IM_BUSY 0x01
108
109 /*immediate commands (word written into low 2 bytes of command reg) */
110 #define IM_RESET_IMM_CMD 0x0400
111 #define IM_FEATURE_CTR_IMM_CMD 0x040c
112 #define IM_DMA_PACING_IMM_CMD 0x040d
113 #define IM_ASSIGN_IMM_CMD 0x040e
114 #define IM_ABORT_IMM_CMD 0x040f
115 #define IM_FORMAT_PREP_IMM_CMD 0x0417
116
117 /*SCB (Subsystem Control Block) structure */
118 struct im_scb {
119 unsigned short command; /*command word (read, etc.) */
120 unsigned short enable; /*enable word, modifies cmd */
121 union {
122 unsigned long log_blk_adr; /*block address on SCSI device */
123 unsigned char scsi_cmd_length; /*6,10,12, for other scsi cmd */
124 } u1;
125 unsigned long sys_buf_adr; /*physical system memory adr */
126 unsigned long sys_buf_length; /*size of sys mem buffer */
127 unsigned long tsb_adr; /*Termination Status Block adr */
128 unsigned long scb_chain_adr; /*optional SCB chain address */
129 union {
130 struct {
131 unsigned short count; /*block count, on SCSI device */
132 unsigned short length; /*block length, on SCSI device */
133 } blk;
134 unsigned char scsi_command[12]; /*other scsi command */
135 } u2;
136 };
137
138 /*structure scatter-gather element (for list of system memory areas) */
139 struct im_sge {
140 void *address;
141 unsigned long byte_length;
142 };
143
144 /*structure returned by a get_pos_info command: */
145 struct im_pos_info {
146 unsigned short pos_id; /* adapter id */
147 unsigned char pos_3a; /* pos 3 (if pos 6 = 0) */
148 unsigned char pos_2; /* pos 2 */
149 unsigned char int_level; /* interrupt level IRQ 11 or 14 */
150 unsigned char pos_4a; /* pos 4 (if pos 6 = 0) */
151 unsigned short connector_size; /* MCA connector size: 16 or 32 Bit */
152 unsigned char num_luns; /* number of supported luns per device */
153 unsigned char num_puns; /* number of supported puns */
154 unsigned char pacing_factor; /* pacing factor */
155 unsigned char num_ldns; /* number of ldns available */
156 unsigned char eoi_off; /* time EOI and interrupt inactive */
157 unsigned char max_busy; /* time between reset and busy on */
158 unsigned short cache_stat; /* ldn cachestat. Bit=1 = not cached */
159 unsigned short retry_stat; /* retry status of ldns. Bit=1=disabled */
160 unsigned char pos_4b; /* pos 4 (if pos 6 = 1) */
161 unsigned char pos_3b; /* pos 3 (if pos 6 = 1) */
162 unsigned char pos_6; /* pos 6 */
163 unsigned char pos_5; /* pos 5 */
164 unsigned short max_overlap; /* maximum overlapping requests */
165 unsigned short num_bus; /* number of SCSI-busses */
166 };
167
168 /*values for SCB command word */
169 #define IM_NO_SYNCHRONOUS 0x0040 /*flag for any command */
170 #define IM_NO_DISCONNECT 0x0080 /*flag for any command */
171 #define IM_READ_DATA_CMD 0x1c01
172 #define IM_WRITE_DATA_CMD 0x1c02
173 #define IM_READ_VERIFY_CMD 0x1c03
174 #define IM_WRITE_VERIFY_CMD 0x1c04
175 #define IM_REQUEST_SENSE_CMD 0x1c08
176 #define IM_READ_CAPACITY_CMD 0x1c09
177 #define IM_DEVICE_INQUIRY_CMD 0x1c0b
178 #define IM_READ_LOGICAL_CMD 0x1c2a
179 #define IM_OTHER_SCSI_CMD_CMD 0x241f
180
181 /* unused, but supported, SCB commands */
182 #define IM_GET_COMMAND_COMPLETE_STATUS_CMD 0x1c07 /* command status */
183 #define IM_GET_POS_INFO_CMD 0x1c0a /* returns neat stuff */
184 #define IM_READ_PREFETCH_CMD 0x1c31 /* caching controller only */
185 #define IM_FOMAT_UNIT_CMD 0x1c16 /* format unit */
186 #define IM_REASSIGN_BLOCK_CMD 0x1c18 /* in case of error */
187
188 /*values to set bits in the enable word of SCB */
189 #define IM_READ_CONTROL 0x8000
190 #define IM_REPORT_TSB_ONLY_ON_ERROR 0x4000
191 #define IM_RETRY_ENABLE 0x2000
192 #define IM_POINTER_TO_LIST 0x1000
193 #define IM_SUPRESS_EXCEPTION_SHORT 0x0400
194 #define IM_BYPASS_BUFFER 0x0200
195 #define IM_CHAIN_ON_NO_ERROR 0x0001
196
197 /*TSB (Termination Status Block) structure */
198 struct im_tsb {
199 unsigned short end_status;
200 unsigned short reserved1;
201 unsigned long residual_byte_count;
202 unsigned long sg_list_element_adr;
203 unsigned short status_length;
204 unsigned char dev_status;
205 unsigned char cmd_status;
206 unsigned char dev_error;
207 unsigned char cmd_error;
208 unsigned short reserved2;
209 unsigned short reserved3;
210 unsigned short low_of_last_scb_adr;
211 unsigned short high_of_last_scb_adr;
212 };
213
214 /*subsystem uses interrupt request level 14 */
215 #define IM_IRQ 14
216 /*SCSI-2 F/W may evade to interrupt 11 */
217 #define IM_IRQ_FW 11
218
219 /* Model 95 has an additional alphanumeric display, which can be used
220 to display SCSI-activities. 8595 models do not have any disk led, which
221 makes this feature quite useful.
222 The regular PS/2 disk led is turned on/off by bits 6,7 of system
223 control port. */
224
225 /* LED display-port (actually, last LED on display) */
226 #define MOD95_LED_PORT 0x108
227 /* system-control-register of PS/2s with diskindicator */
228 #define PS2_SYS_CTR 0x92
229 /* activity displaying methods */
230 #define LED_DISP 1
231 #define LED_ADISP 2
232 #define LED_ACTIVITY 4
233 /* failed intr */
234 #define CMD_FAIL 255
235
236 /* The SCSI-ID(!) of the accessed SCSI-device is shown on PS/2-95 machines' LED
237 displays. ldn is no longer displayed here, because the ldn mapping is now
238 done dynamically and the ldn <-> pun,lun maps can be looked-up at boottime
239 or during uptime in /proc/scsi/ibmmca/<host_no> in case of trouble,
240 interest, debugging or just for having fun. The left number gives the
241 host-adapter number and the right shows the accessed SCSI-ID. */
242
243 /* display_mode is set by the ibmmcascsi= command line arg */
244 static int display_mode = 0;
245 /* set default adapter timeout */
246 static unsigned int adapter_timeout = 45;
247 /* for probing on feature-command: */
248 static unsigned int global_command_error_excuse = 0;
249 /* global setting by command line for adapter_speed */
250 static int global_adapter_speed = 0; /* full speed by default */
251
252 /* Panel / LED on, do it right for F/W addressin, too. adisplay will
253 * just ignore ids>7, as the panel has only 7 digits available */
254 #define PS2_DISK_LED_ON(ad,id) { if (display_mode & LED_DISP) { if (id>9) \
255 outw((ad+48)|((id+55)<<8), MOD95_LED_PORT ); else \
256 outw((ad+48)|((id+48)<<8), MOD95_LED_PORT ); } else \
257 if (display_mode & LED_ADISP) { if (id<7) outb((char)(id+48),MOD95_LED_PORT+1+id); \
258 outb((char)(ad+48), MOD95_LED_PORT); } \
259 if ((display_mode & LED_ACTIVITY)||(!display_mode)) \
260 outb(inb(PS2_SYS_CTR) | 0xc0, PS2_SYS_CTR); }
261
262 /* Panel / LED off */
263 /* bug fixed, Dec 15, 1997, where | was replaced by & here */
264 #define PS2_DISK_LED_OFF() { if (display_mode & LED_DISP) \
265 outw(0x2020, MOD95_LED_PORT ); else if (display_mode & LED_ADISP) { \
266 outl(0x20202020,MOD95_LED_PORT); outl(0x20202020,MOD95_LED_PORT+4); } \
267 if ((display_mode & LED_ACTIVITY)||(!display_mode)) \
268 outb(inb(PS2_SYS_CTR) & 0x3f, PS2_SYS_CTR); }
269
270 /*list of supported subsystems */
271 struct subsys_list_struct {
272 unsigned short mca_id;
273 char *description;
274 };
275
276 /* types of different supported hardware that goes to hostdata special */
277 #define IBM_SCSI2_FW 0
278 #define IBM_7568_WCACHE 1
279 #define IBM_EXP_UNIT 2
280 #define IBM_SCSI_WCACHE 3
281 #define IBM_SCSI 4
282
283 /* other special flags for hostdata structure */
284 #define FORCED_DETECTION 100
285 #define INTEGRATED_SCSI 101
286
287 /* List of possible IBM-SCSI-adapters */
288 static struct subsys_list_struct subsys_list[] = {
289 {0x8efc, "IBM SCSI-2 F/W Adapter"}, /* special = 0 */
290 {0x8efd, "IBM 7568 Industrial Computer SCSI Adapter w/Cache"}, /* special = 1 */
291 {0x8ef8, "IBM Expansion Unit SCSI Controller"}, /* special = 2 */
292 {0x8eff, "IBM SCSI Adapter w/Cache"}, /* special = 3 */
293 {0x8efe, "IBM SCSI Adapter"}, /* special = 4 */
294 };
295
296 /* Max number of logical devices (can be up from 0 to 14). 15 is the address
297 of the adapter itself. */
298 #define MAX_LOG_DEV 15
299
300 /*local data for a logical device */
301 struct logical_device {
302 struct im_scb scb; /* SCSI-subsystem-control-block structure */
303 struct im_tsb tsb; /* SCSI command complete status block structure */
304 struct im_sge sge[16]; /* scatter gather list structure */
305 unsigned char buf[256]; /* SCSI command return data buffer */
306 Scsi_Cmnd *cmd; /* SCSI-command that is currently in progress */
307 int device_type; /* type of the SCSI-device. See include/scsi/scsi.h
308 for interpretation of the possible values */
309 int block_length; /* blocksize of a particular logical SCSI-device */
310 int cache_flag; /* 1 if this is uncached, 0 if cache is present for ldn */
311 int retry_flag; /* 1 if adapter retry is disabled, 0 if enabled */
312 };
313
314 /* statistics of the driver during operations (for proc_info) */
315 struct Driver_Statistics {
316 /* SCSI statistics on the adapter */
317 int ldn_access[MAX_LOG_DEV + 1]; /* total accesses on a ldn */
318 int ldn_read_access[MAX_LOG_DEV + 1]; /* total read-access on a ldn */
319 int ldn_write_access[MAX_LOG_DEV + 1]; /* total write-access on a ldn */
320 int ldn_inquiry_access[MAX_LOG_DEV + 1]; /* total inquiries on a ldn */
321 int ldn_modeselect_access[MAX_LOG_DEV + 1]; /* total mode selects on ldn */
322 int scbs; /* short SCBs queued */
323 int long_scbs; /* long SCBs queued */
324 int total_accesses; /* total accesses on all ldns */
325 int total_interrupts; /* total interrupts (should be
326 same as total_accesses) */
327 int total_errors; /* command completed with error */
328 /* dynamical assignment statistics */
329 int total_scsi_devices; /* number of physical pun,lun */
330 int dyn_flag; /* flag showing dynamical mode */
331 int dynamical_assignments; /* number of remappings of ldns */
332 int ldn_assignments[MAX_LOG_DEV + 1]; /* number of remappings of each
333 ldn */
334 };
335
336 /* data structure for each host adapter */
337 struct ibmmca_hostdata {
338 /* array of logical devices: */
339 struct logical_device _ld[MAX_LOG_DEV + 1];
340 /* array to convert (pun, lun) into logical device number: */
341 unsigned char _get_ldn[16][8];
342 /*array that contains the information about the physical SCSI-devices
343 attached to this host adapter: */
344 unsigned char _get_scsi[16][8];
345 /* used only when checking logical devices: */
346 int _local_checking_phase_flag;
347 /* report received interrupt: */
348 int _got_interrupt;
349 /* report termination-status of SCSI-command: */
350 int _stat_result;
351 /* reset status (used only when doing reset): */
352 int _reset_status;
353 /* code of the last SCSI command (needed for panic info): */
354 int _last_scsi_command[MAX_LOG_DEV + 1];
355 /* identifier of the last SCSI-command type */
356 int _last_scsi_type[MAX_LOG_DEV + 1];
357 /* last blockcount */
358 int _last_scsi_blockcount[MAX_LOG_DEV + 1];
359 /* last locgical block address */
360 unsigned long _last_scsi_logical_block[MAX_LOG_DEV + 1];
361 /* Counter that points on the next reassignable ldn for dynamical
362 remapping. The default value is 7, that is the first reassignable
363 number in the list at boottime: */
364 int _next_ldn;
365 /* Statistics-structure for this IBM-SCSI-host: */
366 struct Driver_Statistics _IBM_DS;
367 /* This hostadapters pos-registers pos2 until pos6 */
368 unsigned int _pos[8];
369 /* assign a special variable, that contains dedicated info about the
370 adaptertype */
371 int _special;
372 /* connector size on the MCA bus */
373 int _connector_size;
374 /* synchronous SCSI transfer rate bitpattern */
375 int _adapter_speed;
376 };
377
378 /* macros to access host data structure */
379 #define subsystem_pun(hi) (hosts[(hi)]->this_id)
380 #define subsystem_maxid(hi) (hosts[(hi)]->max_id)
381 #define ld(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_ld)
382 #define get_ldn(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_get_ldn)
383 #define get_scsi(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_get_scsi)
384 #define local_checking_phase_flag(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_local_checking_phase_flag)
385 #define got_interrupt(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_got_interrupt)
386 #define stat_result(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_stat_result)
387 #define reset_status(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_reset_status)
388 #define last_scsi_command(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_command)
389 #define last_scsi_type(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_type)
390 #define last_scsi_blockcount(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_blockcount)
391 #define last_scsi_logical_block(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_logical_block)
392 #define last_scsi_type(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_type)
393 #define next_ldn(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_next_ldn)
394 #define IBM_DS(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_IBM_DS)
395 #define special(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_special)
396 #define subsystem_connector_size(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_connector_size)
397 #define adapter_speed(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_adapter_speed)
398 #define pos2(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_pos[2])
399 #define pos3(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_pos[3])
400 #define pos4(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_pos[4])
401 #define pos5(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_pos[5])
402 #define pos6(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_pos[6])
403
404 /* Define a arbitrary number as subsystem-marker-type. This number is, as
405 described in the ANSI-SCSI-standard, not occupied by other device-types. */
406 #define TYPE_IBM_SCSI_ADAPTER 0x2F
407
408 /* Define 0xFF for no device type, because this type is not defined within
409 the ANSI-SCSI-standard, therefore, it can be used and should not cause any
410 harm. */
411 #define TYPE_NO_DEVICE 0xFF
412
413 /* define medium-changer. If this is not defined previously, e.g. Linux
414 2.0.x, define this type here. */
415 #ifndef TYPE_MEDIUM_CHANGER
416 #define TYPE_MEDIUM_CHANGER 0x08
417 #endif
418
419 /* define possible operations for the immediate_assign command */
420 #define SET_LDN 0
421 #define REMOVE_LDN 1
422
423 /* ldn which is used to probe the SCSI devices */
424 #define PROBE_LDN 0
425
426 /* reset status flag contents */
427 #define IM_RESET_NOT_IN_PROGRESS 0
428 #define IM_RESET_IN_PROGRESS 1
429 #define IM_RESET_FINISHED_OK 2
430 #define IM_RESET_FINISHED_FAIL 3
431 #define IM_RESET_NOT_IN_PROGRESS_NO_INT 4
432 #define IM_RESET_FINISHED_OK_NO_INT 5
433
434 /* define undefined SCSI-command */
435 #define NO_SCSI 0xffff
436
437 /*-----------------------------------------------------------------------*/
438
439 /* if this is nonzero, ibmmcascsi option has been passed to the kernel */
440 static int io_port[IM_MAX_HOSTS] = { 0, 0, 0, 0, 0, 0, 0, 0 };
441 static int scsi_id[IM_MAX_HOSTS] = { 7, 7, 7, 7, 7, 7, 7, 7 };
442
443 /* fill module-parameters only, when this define is present.
444 (that is kernel version 2.1.x) */
445 #if defined(MODULE)
446 static char *boot_options = NULL;
447 module_param(boot_options, charp, 0);
448 module_param_array(io_port, int, NULL, 0);
449 module_param_array(scsi_id, int, NULL, 0);
450
451 #if 0 /* FIXME: No longer exist? --RR */
452 MODULE_PARM(display, "1i");
453 MODULE_PARM(adisplay, "1i");
454 MODULE_PARM(normal, "1i");
455 MODULE_PARM(ansi, "1i");
456 #endif
457
458 MODULE_LICENSE("GPL");
459 #endif
460 /*counter of concurrent disk read/writes, to turn on/off disk led */
461 static int disk_rw_in_progress = 0;
462
463 /* host information */
464 static int found = 0;
465 static struct Scsi_Host *hosts[IM_MAX_HOSTS + 1] = {
466 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
467 };
468 static unsigned int pos[8]; /* whole pos register-line for diagnosis */
469 /* Taking into account the additions, made by ZP Gu.
470 * This selects now the preset value from the configfile and
471 * offers the 'normal' commandline option to be accepted */
472 #ifdef CONFIG_IBMMCA_SCSI_ORDER_STANDARD
473 static char ibm_ansi_order = 1;
474 #else
475 static char ibm_ansi_order = 0;
476 #endif
477
478 static void issue_cmd(int, unsigned long, unsigned char);
479 static void internal_done(Scsi_Cmnd * cmd);
480 static void check_devices(int, int);
481 static int immediate_assign(int, unsigned int, unsigned int, unsigned int, unsigned int);
482 static int immediate_feature(int, unsigned int, unsigned int);
483 #ifdef CONFIG_IBMMCA_SCSI_DEV_RESET
484 static int immediate_reset(int, unsigned int);
485 #endif
486 static int device_inquiry(int, int);
487 static int read_capacity(int, int);
488 static int get_pos_info(int);
489 static char *ti_p(int);
490 static char *ti_l(int);
491 static char *ibmrate(unsigned int, int);
492 static int probe_display(int);
493 static int probe_bus_mode(int);
494 static int device_exists(int, int, int *, int *);
495 static struct Scsi_Host *ibmmca_register(struct scsi_host_template *, int, int, int, char *);
496 static int option_setup(char *);
497 /* local functions needed for proc_info */
498 static int ldn_access_load(int, int);
499 static int ldn_access_total_read_write(int);
500
501 static irqreturn_t interrupt_handler(int irq, void *dev_id,
502 struct pt_regs *regs)
503 {
504 int host_index, ihost_index;
505 unsigned int intr_reg;
506 unsigned int cmd_result;
507 unsigned int ldn;
508 Scsi_Cmnd *cmd;
509 int lastSCSI;
510 struct Scsi_Host *dev = dev_id;
511
512 spin_lock(dev->host_lock);
513 /* search for one adapter-response on shared interrupt */
514 for (host_index = 0; hosts[host_index] && !(inb(IM_STAT_REG(host_index)) & IM_INTR_REQUEST); host_index++);
515 /* return if some other device on this IRQ caused the interrupt */
516 if (!hosts[host_index]) {
517 spin_unlock(dev->host_lock);
518 return IRQ_NONE;
519 }
520
521 /* the reset-function already did all the job, even ints got
522 renabled on the subsystem, so just return */
523 if ((reset_status(host_index) == IM_RESET_NOT_IN_PROGRESS_NO_INT) || (reset_status(host_index) == IM_RESET_FINISHED_OK_NO_INT)) {
524 reset_status(host_index) = IM_RESET_NOT_IN_PROGRESS;
525 spin_unlock(dev->host_lock);
526 return IRQ_HANDLED;
527 }
528
529 /*must wait for attention reg not busy, then send EOI to subsystem */
530 while (1) {
531 if (!(inb(IM_STAT_REG(host_index)) & IM_BUSY))
532 break;
533 cpu_relax();
534 }
535 ihost_index = host_index;
536 /*get command result and logical device */
537 intr_reg = (unsigned char) (inb(IM_INTR_REG(ihost_index)));
538 cmd_result = intr_reg & 0xf0;
539 ldn = intr_reg & 0x0f;
540 /* get the last_scsi_command here */
541 lastSCSI = last_scsi_command(ihost_index)[ldn];
542 outb(IM_EOI | ldn, IM_ATTN_REG(ihost_index));
543
544 /*these should never happen (hw fails, or a local programming bug) */
545 if (!global_command_error_excuse) {
546 switch (cmd_result) {
547 /* Prevent from Ooopsing on error to show the real reason */
548 case IM_ADAPTER_HW_FAILURE:
549 case IM_SOFTWARE_SEQUENCING_ERROR:
550 case IM_CMD_ERROR:
551 printk(KERN_ERR "IBM MCA SCSI: Fatal Subsystem ERROR!\n");
552 printk(KERN_ERR " Last cmd=0x%x, ena=%x, len=", lastSCSI, ld(ihost_index)[ldn].scb.enable);
553 if (ld(ihost_index)[ldn].cmd)
554 printk("%ld/%ld,", (long) (ld(ihost_index)[ldn].cmd->request_bufflen), (long) (ld(ihost_index)[ldn].scb.sys_buf_length));
555 else
556 printk("none,");
557 if (ld(ihost_index)[ldn].cmd)
558 printk("Blocksize=%d", ld(ihost_index)[ldn].scb.u2.blk.length);
559 else
560 printk("Blocksize=none");
561 printk(", host=0x%x, ldn=0x%x\n", ihost_index, ldn);
562 if (ld(ihost_index)[ldn].cmd) {
563 printk(KERN_ERR "Blockcount=%d/%d\n", last_scsi_blockcount(ihost_index)[ldn], ld(ihost_index)[ldn].scb.u2.blk.count);
564 printk(KERN_ERR "Logical block=%lx/%lx\n", last_scsi_logical_block(ihost_index)[ldn], ld(ihost_index)[ldn].scb.u1.log_blk_adr);
565 }
566 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");
567 /* if errors appear, enter this section to give detailed info */
568 printk(KERN_ERR "IBM MCA SCSI: Subsystem Error-Status follows:\n");
569 printk(KERN_ERR " Command Type................: %x\n", last_scsi_type(ihost_index)[ldn]);
570 printk(KERN_ERR " Attention Register..........: %x\n", inb(IM_ATTN_REG(ihost_index)));
571 printk(KERN_ERR " Basic Control Register......: %x\n", inb(IM_CTR_REG(ihost_index)));
572 printk(KERN_ERR " Interrupt Status Register...: %x\n", intr_reg);
573 printk(KERN_ERR " Basic Status Register.......: %x\n", inb(IM_STAT_REG(ihost_index)));
574 if ((last_scsi_type(ihost_index)[ldn] == IM_SCB) || (last_scsi_type(ihost_index)[ldn] == IM_LONG_SCB)) {
575 printk(KERN_ERR " SCB-Command.................: %x\n", ld(ihost_index)[ldn].scb.command);
576 printk(KERN_ERR " SCB-Enable..................: %x\n", ld(ihost_index)[ldn].scb.enable);
577 printk(KERN_ERR " SCB-logical block address...: %lx\n", ld(ihost_index)[ldn].scb.u1.log_blk_adr);
578 printk(KERN_ERR " SCB-system buffer address...: %lx\n", ld(ihost_index)[ldn].scb.sys_buf_adr);
579 printk(KERN_ERR " SCB-system buffer length....: %lx\n", ld(ihost_index)[ldn].scb.sys_buf_length);
580 printk(KERN_ERR " SCB-tsb address.............: %lx\n", ld(ihost_index)[ldn].scb.tsb_adr);
581 printk(KERN_ERR " SCB-Chain address...........: %lx\n", ld(ihost_index)[ldn].scb.scb_chain_adr);
582 printk(KERN_ERR " SCB-block count.............: %x\n", ld(ihost_index)[ldn].scb.u2.blk.count);
583 printk(KERN_ERR " SCB-block length............: %x\n", ld(ihost_index)[ldn].scb.u2.blk.length);
584 }
585 printk(KERN_ERR " Send this report to the maintainer.\n");
586 panic("IBM MCA SCSI: Fatal error message from the subsystem (0x%X,0x%X)!\n", lastSCSI, cmd_result);
587 break;
588 }
589 } else {
590 /* The command error handling is made silent, but we tell the
591 * calling function, that there is a reported error from the
592 * adapter. */
593 switch (cmd_result) {
594 case IM_ADAPTER_HW_FAILURE:
595 case IM_SOFTWARE_SEQUENCING_ERROR:
596 case IM_CMD_ERROR:
597 global_command_error_excuse = CMD_FAIL;
598 break;
599 default:
600 global_command_error_excuse = 0;
601 break;
602 }
603 }
604 /* if no panic appeared, increase the interrupt-counter */
605 IBM_DS(ihost_index).total_interrupts++;
606 /*only for local checking phase */
607 if (local_checking_phase_flag(ihost_index)) {
608 stat_result(ihost_index) = cmd_result;
609 got_interrupt(ihost_index) = 1;
610 reset_status(ihost_index) = IM_RESET_FINISHED_OK;
611 last_scsi_command(ihost_index)[ldn] = NO_SCSI;
612 spin_unlock(dev->host_lock);
613 return IRQ_HANDLED;
614 }
615 /* handling of commands coming from upper level of scsi driver */
616 if (last_scsi_type(ihost_index)[ldn] == IM_IMM_CMD) {
617 /* verify ldn, and may handle rare reset immediate command */
618 if ((reset_status(ihost_index) == IM_RESET_IN_PROGRESS) && (last_scsi_command(ihost_index)[ldn] == IM_RESET_IMM_CMD)) {
619 if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE) {
620 disk_rw_in_progress = 0;
621 PS2_DISK_LED_OFF();
622 reset_status(ihost_index) = IM_RESET_FINISHED_FAIL;
623 } else {
624 /*reset disk led counter, turn off disk led */
625 disk_rw_in_progress = 0;
626 PS2_DISK_LED_OFF();
627 reset_status(ihost_index) = IM_RESET_FINISHED_OK;
628 }
629 stat_result(ihost_index) = cmd_result;
630 last_scsi_command(ihost_index)[ldn] = NO_SCSI;
631 last_scsi_type(ihost_index)[ldn] = 0;
632 spin_unlock(dev->host_lock);
633 return IRQ_HANDLED;
634 } else if (last_scsi_command(ihost_index)[ldn] == IM_ABORT_IMM_CMD) {
635 /* react on SCSI abort command */
636 #ifdef IM_DEBUG_PROBE
637 printk("IBM MCA SCSI: Interrupt from SCSI-abort.\n");
638 #endif
639 disk_rw_in_progress = 0;
640 PS2_DISK_LED_OFF();
641 cmd = ld(ihost_index)[ldn].cmd;
642 ld(ihost_index)[ldn].cmd = NULL;
643 if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE)
644 cmd->result = DID_NO_CONNECT << 16;
645 else
646 cmd->result = DID_ABORT << 16;
647 stat_result(ihost_index) = cmd_result;
648 last_scsi_command(ihost_index)[ldn] = NO_SCSI;
649 last_scsi_type(ihost_index)[ldn] = 0;
650 if (cmd->scsi_done)
651 (cmd->scsi_done) (cmd); /* should be the internal_done */
652 spin_unlock(dev->host_lock);
653 return IRQ_HANDLED;
654 } else {
655 disk_rw_in_progress = 0;
656 PS2_DISK_LED_OFF();
657 reset_status(ihost_index) = IM_RESET_FINISHED_OK;
658 stat_result(ihost_index) = cmd_result;
659 last_scsi_command(ihost_index)[ldn] = NO_SCSI;
660 spin_unlock(dev->host_lock);
661 return IRQ_HANDLED;
662 }
663 }
664 last_scsi_command(ihost_index)[ldn] = NO_SCSI;
665 last_scsi_type(ihost_index)[ldn] = 0;
666 cmd = ld(ihost_index)[ldn].cmd;
667 ld(ihost_index)[ldn].cmd = NULL;
668 #ifdef IM_DEBUG_TIMEOUT
669 if (cmd) {
670 if ((cmd->target == TIMEOUT_PUN) && (cmd->device->lun == TIMEOUT_LUN)) {
671 printk("IBM MCA SCSI: Ignoring interrupt from pun=%x, lun=%x.\n", cmd->target, cmd->device->lun);
672 return IRQ_HANDLED;
673 }
674 }
675 #endif
676 /*if no command structure, just return, else clear cmd */
677 if (!cmd)
678 {
679 spin_unlock(dev->host_lock);
680 return IRQ_HANDLED;
681 }
682
683 #ifdef IM_DEBUG_INT
684 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);
685 #endif
686 /*if this is end of media read/write, may turn off PS/2 disk led */
687 if ((ld(ihost_index)[ldn].device_type != TYPE_NO_LUN) && (ld(ihost_index)[ldn].device_type != TYPE_NO_DEVICE)) {
688 /* only access this, if there was a valid device addressed */
689 if (--disk_rw_in_progress == 0)
690 PS2_DISK_LED_OFF();
691 }
692
693 /* IBM describes the status-mask to be 0x1e, but this is not conform
694 * with SCSI-definition, I suppose, the reason for it is that IBM
695 * adapters do not support CMD_TERMINATED, TASK_SET_FULL and
696 * ACA_ACTIVE as returning statusbyte information. (ML) */
697 if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE) {
698 cmd->result = (unsigned char) (ld(ihost_index)[ldn].tsb.dev_status & 0x1e);
699 IBM_DS(ihost_index).total_errors++;
700 } else
701 cmd->result = 0;
702 /* write device status into cmd->result, and call done function */
703 if (lastSCSI == NO_SCSI) { /* unexpected interrupt :-( */
704 cmd->result |= DID_BAD_INTR << 16;
705 printk("IBM MCA SCSI: WARNING - Interrupt from non-pending SCSI-command!\n");
706 } else /* things went right :-) */
707 cmd->result |= DID_OK << 16;
708 if (cmd->scsi_done)
709 (cmd->scsi_done) (cmd);
710 spin_unlock(dev->host_lock);
711 return IRQ_HANDLED;
712 }
713
714 static void issue_cmd(int host_index, unsigned long cmd_reg, unsigned char attn_reg)
715 {
716 unsigned long flags;
717 /* must wait for attention reg not busy */
718 while (1) {
719 spin_lock_irqsave(hosts[host_index]->host_lock, flags);
720 if (!(inb(IM_STAT_REG(host_index)) & IM_BUSY))
721 break;
722 spin_unlock_irqrestore(hosts[host_index]->host_lock, flags);
723 }
724 /* write registers and enable system interrupts */
725 outl(cmd_reg, IM_CMD_REG(host_index));
726 outb(attn_reg, IM_ATTN_REG(host_index));
727 spin_unlock_irqrestore(hosts[host_index]->host_lock, flags);
728 }
729
730 static void internal_done(Scsi_Cmnd * cmd)
731 {
732 cmd->SCp.Status++;
733 return;
734 }
735
736 /* SCSI-SCB-command for device_inquiry */
737 static int device_inquiry(int host_index, int ldn)
738 {
739 int retr;
740 struct im_scb *scb;
741 struct im_tsb *tsb;
742 unsigned char *buf;
743
744 scb = &(ld(host_index)[ldn].scb);
745 tsb = &(ld(host_index)[ldn].tsb);
746 buf = (unsigned char *) (&(ld(host_index)[ldn].buf));
747 ld(host_index)[ldn].tsb.dev_status = 0; /* prepare statusblock */
748 for (retr = 0; retr < 3; retr++) {
749 /* fill scb with inquiry command */
750 scb->command = IM_DEVICE_INQUIRY_CMD | IM_NO_DISCONNECT;
751 scb->enable = IM_REPORT_TSB_ONLY_ON_ERROR | IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_RETRY_ENABLE | IM_BYPASS_BUFFER;
752 last_scsi_command(host_index)[ldn] = IM_DEVICE_INQUIRY_CMD;
753 last_scsi_type(host_index)[ldn] = IM_SCB;
754 scb->sys_buf_adr = isa_virt_to_bus(buf);
755 scb->sys_buf_length = 255; /* maximum bufferlength gives max info */
756 scb->tsb_adr = isa_virt_to_bus(tsb);
757 /* issue scb to passed ldn, and busy wait for interrupt */
758 got_interrupt(host_index) = 0;
759 issue_cmd(host_index, isa_virt_to_bus(scb), IM_SCB | ldn);
760 while (!got_interrupt(host_index))
761 barrier();
762
763 /*if command succesful, break */
764 if ((stat_result(host_index) == IM_SCB_CMD_COMPLETED) || (stat_result(host_index) == IM_SCB_CMD_COMPLETED_WITH_RETRIES))
765 return 1;
766 }
767 /*if all three retries failed, return "no device at this ldn" */
768 if (retr >= 3)
769 return 0;
770 else
771 return 1;
772 }
773
774 static int read_capacity(int host_index, int ldn)
775 {
776 int retr;
777 struct im_scb *scb;
778 struct im_tsb *tsb;
779 unsigned char *buf;
780
781 scb = &(ld(host_index)[ldn].scb);
782 tsb = &(ld(host_index)[ldn].tsb);
783 buf = (unsigned char *) (&(ld(host_index)[ldn].buf));
784 ld(host_index)[ldn].tsb.dev_status = 0;
785 for (retr = 0; retr < 3; retr++) {
786 /*fill scb with read capacity command */
787 scb->command = IM_READ_CAPACITY_CMD;
788 scb->enable = IM_REPORT_TSB_ONLY_ON_ERROR | IM_READ_CONTROL | IM_RETRY_ENABLE | IM_BYPASS_BUFFER;
789 last_scsi_command(host_index)[ldn] = IM_READ_CAPACITY_CMD;
790 last_scsi_type(host_index)[ldn] = IM_SCB;
791 scb->sys_buf_adr = isa_virt_to_bus(buf);
792 scb->sys_buf_length = 8;
793 scb->tsb_adr = isa_virt_to_bus(tsb);
794 /*issue scb to passed ldn, and busy wait for interrupt */
795 got_interrupt(host_index) = 0;
796 issue_cmd(host_index, isa_virt_to_bus(scb), IM_SCB | ldn);
797 while (!got_interrupt(host_index))
798 barrier();
799
800 /*if got capacity, get block length and return one device found */
801 if ((stat_result(host_index) == IM_SCB_CMD_COMPLETED) || (stat_result(host_index) == IM_SCB_CMD_COMPLETED_WITH_RETRIES))
802 return 1;
803 }
804 /*if all three retries failed, return "no device at this ldn" */
805 if (retr >= 3)
806 return 0;
807 else
808 return 1;
809 }
810
811 static int get_pos_info(int host_index)
812 {
813 int retr;
814 struct im_scb *scb;
815 struct im_tsb *tsb;
816 unsigned char *buf;
817
818 scb = &(ld(host_index)[MAX_LOG_DEV].scb);
819 tsb = &(ld(host_index)[MAX_LOG_DEV].tsb);
820 buf = (unsigned char *) (&(ld(host_index)[MAX_LOG_DEV].buf));
821 ld(host_index)[MAX_LOG_DEV].tsb.dev_status = 0;
822 for (retr = 0; retr < 3; retr++) {
823 /*fill scb with get_pos_info command */
824 scb->command = IM_GET_POS_INFO_CMD;
825 scb->enable = IM_READ_CONTROL | IM_REPORT_TSB_ONLY_ON_ERROR | IM_RETRY_ENABLE | IM_BYPASS_BUFFER;
826 last_scsi_command(host_index)[MAX_LOG_DEV] = IM_GET_POS_INFO_CMD;
827 last_scsi_type(host_index)[MAX_LOG_DEV] = IM_SCB;
828 scb->sys_buf_adr = isa_virt_to_bus(buf);
829 if (special(host_index) == IBM_SCSI2_FW)
830 scb->sys_buf_length = 256; /* get all info from F/W adapter */
831 else
832 scb->sys_buf_length = 18; /* get exactly 18 bytes for other SCSI */
833 scb->tsb_adr = isa_virt_to_bus(tsb);
834 /*issue scb to ldn=15, and busy wait for interrupt */
835 got_interrupt(host_index) = 0;
836 issue_cmd(host_index, isa_virt_to_bus(scb), IM_SCB | MAX_LOG_DEV);
837
838 /* FIXME: timeout */
839 while (!got_interrupt(host_index))
840 barrier();
841
842 /*if got POS-stuff, get block length and return one device found */
843 if ((stat_result(host_index) == IM_SCB_CMD_COMPLETED) || (stat_result(host_index) == IM_SCB_CMD_COMPLETED_WITH_RETRIES))
844 return 1;
845 }
846 /* if all three retries failed, return "no device at this ldn" */
847 if (retr >= 3)
848 return 0;
849 else
850 return 1;
851 }
852
853 /* SCSI-immediate-command for assign. This functions maps/unmaps specific
854 ldn-numbers on SCSI (PUN,LUN). It is needed for presetting of the
855 subsystem and for dynamical remapping od ldns. */
856 static int immediate_assign(int host_index, unsigned int pun, unsigned int lun, unsigned int ldn, unsigned int operation)
857 {
858 int retr;
859 unsigned long imm_cmd;
860
861 for (retr = 0; retr < 3; retr++) {
862 /* select mutation level of the SCSI-adapter */
863 switch (special(host_index)) {
864 case IBM_SCSI2_FW:
865 imm_cmd = (unsigned long) (IM_ASSIGN_IMM_CMD);
866 imm_cmd |= (unsigned long) ((lun & 7) << 24);
867 imm_cmd |= (unsigned long) ((operation & 1) << 23);
868 imm_cmd |= (unsigned long) ((pun & 7) << 20) | ((pun & 8) << 24);
869 imm_cmd |= (unsigned long) ((ldn & 15) << 16);
870 break;
871 default:
872 imm_cmd = inl(IM_CMD_REG(host_index));
873 imm_cmd &= (unsigned long) (0xF8000000); /* keep reserved bits */
874 imm_cmd |= (unsigned long) (IM_ASSIGN_IMM_CMD);
875 imm_cmd |= (unsigned long) ((lun & 7) << 24);
876 imm_cmd |= (unsigned long) ((operation & 1) << 23);
877 imm_cmd |= (unsigned long) ((pun & 7) << 20);
878 imm_cmd |= (unsigned long) ((ldn & 15) << 16);
879 break;
880 }
881 last_scsi_command(host_index)[MAX_LOG_DEV] = IM_ASSIGN_IMM_CMD;
882 last_scsi_type(host_index)[MAX_LOG_DEV] = IM_IMM_CMD;
883 got_interrupt(host_index) = 0;
884 issue_cmd(host_index, (unsigned long) (imm_cmd), IM_IMM_CMD | MAX_LOG_DEV);
885 while (!got_interrupt(host_index))
886 barrier();
887
888 /*if command succesful, break */
889 if (stat_result(host_index) == IM_IMMEDIATE_CMD_COMPLETED)
890 return 1;
891 }
892 if (retr >= 3)
893 return 0;
894 else
895 return 1;
896 }
897
898 static int immediate_feature(int host_index, unsigned int speed, unsigned int timeout)
899 {
900 int retr;
901 unsigned long imm_cmd;
902
903 for (retr = 0; retr < 3; retr++) {
904 /* select mutation level of the SCSI-adapter */
905 imm_cmd = IM_FEATURE_CTR_IMM_CMD;
906 imm_cmd |= (unsigned long) ((speed & 0x7) << 29);
907 imm_cmd |= (unsigned long) ((timeout & 0x1fff) << 16);
908 last_scsi_command(host_index)[MAX_LOG_DEV] = IM_FEATURE_CTR_IMM_CMD;
909 last_scsi_type(host_index)[MAX_LOG_DEV] = IM_IMM_CMD;
910 got_interrupt(host_index) = 0;
911 /* we need to run into command errors in order to probe for the
912 * right speed! */
913 global_command_error_excuse = 1;
914 issue_cmd(host_index, (unsigned long) (imm_cmd), IM_IMM_CMD | MAX_LOG_DEV);
915
916 /* FIXME: timeout */
917 while (!got_interrupt(host_index))
918 barrier();
919 if (global_command_error_excuse == CMD_FAIL) {
920 global_command_error_excuse = 0;
921 return 2;
922 } else
923 global_command_error_excuse = 0;
924 /*if command succesful, break */
925 if (stat_result(host_index) == IM_IMMEDIATE_CMD_COMPLETED)
926 return 1;
927 }
928 if (retr >= 3)
929 return 0;
930 else
931 return 1;
932 }
933
934 #ifdef CONFIG_IBMMCA_SCSI_DEV_RESET
935 static int immediate_reset(int host_index, unsigned int ldn)
936 {
937 int retries;
938 int ticks;
939 unsigned long imm_command;
940
941 for (retries = 0; retries < 3; retries++) {
942 imm_command = inl(IM_CMD_REG(host_index));
943 imm_command &= (unsigned long) (0xFFFF0000); /* keep reserved bits */
944 imm_command |= (unsigned long) (IM_RESET_IMM_CMD);
945 last_scsi_command(host_index)[ldn] = IM_RESET_IMM_CMD;
946 last_scsi_type(host_index)[ldn] = IM_IMM_CMD;
947 got_interrupt(host_index) = 0;
948 reset_status(host_index) = IM_RESET_IN_PROGRESS;
949 issue_cmd(host_index, (unsigned long) (imm_command), IM_IMM_CMD | ldn);
950 ticks = IM_RESET_DELAY * HZ;
951 while (reset_status(host_index) == IM_RESET_IN_PROGRESS && --ticks) {
952 udelay((1 + 999 / HZ) * 1000);
953 barrier();
954 }
955 /* if reset did not complete, just complain */
956 if (!ticks) {
957 printk(KERN_ERR "IBM MCA SCSI: reset did not complete within %d seconds.\n", IM_RESET_DELAY);
958 reset_status(host_index) = IM_RESET_FINISHED_OK;
959 /* did not work, finish */
960 return 1;
961 }
962 /*if command succesful, break */
963 if (stat_result(host_index) == IM_IMMEDIATE_CMD_COMPLETED)
964 return 1;
965 }
966 if (retries >= 3)
967 return 0;
968 else
969 return 1;
970 }
971 #endif
972
973 /* type-interpreter for physical device numbers */
974 static char *ti_p(int dev)
975 {
976 switch (dev) {
977 case TYPE_IBM_SCSI_ADAPTER:
978 return ("A");
979 case TYPE_DISK:
980 return ("D");
981 case TYPE_TAPE:
982 return ("T");
983 case TYPE_PROCESSOR:
984 return ("P");
985 case TYPE_WORM:
986 return ("W");
987 case TYPE_ROM:
988 return ("R");
989 case TYPE_SCANNER:
990 return ("S");
991 case TYPE_MOD:
992 return ("M");
993 case TYPE_MEDIUM_CHANGER:
994 return ("C");
995 case TYPE_NO_LUN:
996 return ("+"); /* show NO_LUN */
997 }
998 return ("-"); /* TYPE_NO_DEVICE and others */
999 }
1000
1001 /* interpreter for logical device numbers (ldn) */
1002 static char *ti_l(int val)
1003 {
1004 const char hex[16] = "0123456789abcdef";
1005 static char answer[2];
1006
1007 answer[1] = (char) (0x0);
1008 if (val <= MAX_LOG_DEV)
1009 answer[0] = hex[val];
1010 else
1011 answer[0] = '-';
1012 return (char *) &answer;
1013 }
1014
1015 /* transfers bitpattern of the feature command to values in MHz */
1016 static char *ibmrate(unsigned int speed, int i)
1017 {
1018 switch (speed) {
1019 case 0:
1020 return i ? "5.00" : "10.00";
1021 case 1:
1022 return i ? "4.00" : "8.00";
1023 case 2:
1024 return i ? "3.33" : "6.66";
1025 case 3:
1026 return i ? "2.86" : "5.00";
1027 case 4:
1028 return i ? "2.50" : "4.00";
1029 case 5:
1030 return i ? "2.22" : "3.10";
1031 case 6:
1032 return i ? "2.00" : "2.50";
1033 case 7:
1034 return i ? "1.82" : "2.00";
1035 }
1036 return "---";
1037 }
1038
1039 static int probe_display(int what)
1040 {
1041 static int rotator = 0;
1042 const char rotor[] = "|/-\\";
1043
1044 if (!(display_mode & LED_DISP))
1045 return 0;
1046 if (!what) {
1047 outl(0x20202020, MOD95_LED_PORT);
1048 outl(0x20202020, MOD95_LED_PORT + 4);
1049 } else {
1050 outb('S', MOD95_LED_PORT + 7);
1051 outb('C', MOD95_LED_PORT + 6);
1052 outb('S', MOD95_LED_PORT + 5);
1053 outb('I', MOD95_LED_PORT + 4);
1054 outb('i', MOD95_LED_PORT + 3);
1055 outb('n', MOD95_LED_PORT + 2);
1056 outb('i', MOD95_LED_PORT + 1);
1057 outb((char) (rotor[rotator]), MOD95_LED_PORT);
1058 rotator++;
1059 if (rotator > 3)
1060 rotator = 0;
1061 }
1062 return 0;
1063 }
1064
1065 static int probe_bus_mode(int host_index)
1066 {
1067 struct im_pos_info *info;
1068 int num_bus = 0;
1069 int ldn;
1070
1071 info = (struct im_pos_info *) (&(ld(host_index)[MAX_LOG_DEV].buf));
1072 if (get_pos_info(host_index)) {
1073 if (info->connector_size & 0xf000)
1074 subsystem_connector_size(host_index) = 16;
1075 else
1076 subsystem_connector_size(host_index) = 32;
1077 num_bus |= (info->pos_4b & 8) >> 3;
1078 for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) {
1079 if ((special(host_index) == IBM_SCSI_WCACHE) || (special(host_index) == IBM_7568_WCACHE)) {
1080 if (!((info->cache_stat >> ldn) & 1))
1081 ld(host_index)[ldn].cache_flag = 0;
1082 }
1083 if (!((info->retry_stat >> ldn) & 1))
1084 ld(host_index)[ldn].retry_flag = 0;
1085 }
1086 #ifdef IM_DEBUG_PROBE
1087 printk("IBM MCA SCSI: SCSI-Cache bits: ");
1088 for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) {
1089 printk("%d", ld(host_index)[ldn].cache_flag);
1090 }
1091 printk("\nIBM MCA SCSI: SCSI-Retry bits: ");
1092 for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) {
1093 printk("%d", ld(host_index)[ldn].retry_flag);
1094 }
1095 printk("\n");
1096 #endif
1097 }
1098 return num_bus;
1099 }
1100
1101 /* probing scsi devices */
1102 static void check_devices(int host_index, int adaptertype)
1103 {
1104 int id, lun, ldn, ticks;
1105 int count_devices; /* local counter for connected device */
1106 int max_pun;
1107 int num_bus;
1108 int speedrun; /* local adapter_speed check variable */
1109
1110 /* assign default values to certain variables */
1111 ticks = 0;
1112 count_devices = 0;
1113 IBM_DS(host_index).dyn_flag = 0; /* normally no need for dynamical ldn management */
1114 IBM_DS(host_index).total_errors = 0; /* set errorcounter to 0 */
1115 next_ldn(host_index) = 7; /* next ldn to be assigned is 7, because 0-6 is 'hardwired' */
1116
1117 /* initialize the very important driver-informational arrays/structs */
1118 memset(ld(host_index), 0, sizeof(ld(host_index)));
1119 for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) {
1120 last_scsi_command(host_index)[ldn] = NO_SCSI; /* emptify last SCSI-command storage */
1121 last_scsi_type(host_index)[ldn] = 0;
1122 ld(host_index)[ldn].cache_flag = 1;
1123 ld(host_index)[ldn].retry_flag = 1;
1124 }
1125 memset(get_ldn(host_index), TYPE_NO_DEVICE, sizeof(get_ldn(host_index))); /* this is essential ! */
1126 memset(get_scsi(host_index), TYPE_NO_DEVICE, sizeof(get_scsi(host_index))); /* this is essential ! */
1127 for (lun = 0; lun < 8; lun++) {
1128 /* mark the adapter at its pun on all luns */
1129 get_scsi(host_index)[subsystem_pun(host_index)][lun] = TYPE_IBM_SCSI_ADAPTER;
1130 get_ldn(host_index)[subsystem_pun(host_index)][lun] = MAX_LOG_DEV; /* make sure, the subsystem
1131 ldn is active for all
1132 luns. */
1133 }
1134 probe_display(0); /* Supercool display usage during SCSI-probing. */
1135 /* This makes sense, when booting without any */
1136 /* monitor connected on model XX95. */
1137
1138 /* STEP 1: */
1139 adapter_speed(host_index) = global_adapter_speed;
1140 speedrun = adapter_speed(host_index);
1141 while (immediate_feature(host_index, speedrun, adapter_timeout) == 2) {
1142 probe_display(1);
1143 if (speedrun == 7)
1144 panic("IBM MCA SCSI: Cannot set Synchronous-Transfer-Rate!\n");
1145 speedrun++;
1146 if (speedrun > 7)
1147 speedrun = 7;
1148 }
1149 adapter_speed(host_index) = speedrun;
1150 /* Get detailed information about the current adapter, necessary for
1151 * device operations: */
1152 num_bus = probe_bus_mode(host_index);
1153
1154 /* num_bus contains only valid data for the F/W adapter! */
1155 if (adaptertype == IBM_SCSI2_FW) { /* F/W SCSI adapter: */
1156 /* F/W adapter PUN-space extension evaluation: */
1157 if (num_bus) {
1158 printk(KERN_INFO "IBM MCA SCSI: Separate bus mode (wide-addressing enabled)\n");
1159 subsystem_maxid(host_index) = 16;
1160 } else {
1161 printk(KERN_INFO "IBM MCA SCSI: Combined bus mode (wide-addressing disabled)\n");
1162 subsystem_maxid(host_index) = 8;
1163 }
1164 printk(KERN_INFO "IBM MCA SCSI: Sync.-Rate (F/W: 20, Int.: 10, Ext.: %s) MBytes/s\n", ibmrate(speedrun, adaptertype));
1165 } else /* all other IBM SCSI adapters: */
1166 printk(KERN_INFO "IBM MCA SCSI: Synchronous-SCSI-Transfer-Rate: %s MBytes/s\n", ibmrate(speedrun, adaptertype));
1167
1168 /* assign correct PUN device space */
1169 max_pun = subsystem_maxid(host_index);
1170
1171 #ifdef IM_DEBUG_PROBE
1172 printk("IBM MCA SCSI: Current SCSI-host index: %d\n", host_index);
1173 printk("IBM MCA SCSI: Removing default logical SCSI-device mapping.");
1174 #else
1175 printk(KERN_INFO "IBM MCA SCSI: Dev. Order: %s, Mapping (takes <2min): ", (ibm_ansi_order) ? "ANSI" : "New");
1176 #endif
1177 for (ldn = 0; ldn < MAX_LOG_DEV; ldn++) {
1178 probe_display(1);
1179 #ifdef IM_DEBUG_PROBE
1180 printk(".");
1181 #endif
1182 immediate_assign(host_index, 0, 0, ldn, REMOVE_LDN); /* remove ldn (wherever) */
1183 }
1184 lun = 0; /* default lun is 0 */
1185 #ifndef IM_DEBUG_PROBE
1186 printk("cleared,");
1187 #endif
1188 /* STEP 2: */
1189 #ifdef IM_DEBUG_PROBE
1190 printk("\nIBM MCA SCSI: Scanning SCSI-devices.");
1191 #endif
1192 for (id = 0; id < max_pun; id++)
1193 #ifdef CONFIG_SCSI_MULTI_LUN
1194 for (lun = 0; lun < 8; lun++)
1195 #endif
1196 {
1197 probe_display(1);
1198 #ifdef IM_DEBUG_PROBE
1199 printk(".");
1200 #endif
1201 if (id != subsystem_pun(host_index)) {
1202 /* if pun is not the adapter: */
1203 /* set ldn=0 to pun,lun */
1204 immediate_assign(host_index, id, lun, PROBE_LDN, SET_LDN);
1205 if (device_inquiry(host_index, PROBE_LDN)) { /* probe device */
1206 get_scsi(host_index)[id][lun] = (unsigned char) (ld(host_index)[PROBE_LDN].buf[0]);
1207 /* entry, even for NO_LUN */
1208 if (ld(host_index)[PROBE_LDN].buf[0] != TYPE_NO_LUN)
1209 count_devices++; /* a existing device is found */
1210 }
1211 /* remove ldn */
1212 immediate_assign(host_index, id, lun, PROBE_LDN, REMOVE_LDN);
1213 }
1214 }
1215 #ifndef IM_DEBUG_PROBE
1216 printk("scanned,");
1217 #endif
1218 /* STEP 3: */
1219 #ifdef IM_DEBUG_PROBE
1220 printk("\nIBM MCA SCSI: Mapping SCSI-devices.");
1221 #endif
1222 ldn = 0;
1223 lun = 0;
1224 #ifdef CONFIG_SCSI_MULTI_LUN
1225 for (lun = 0; lun < 8 && ldn < MAX_LOG_DEV; lun++)
1226 #endif
1227 for (id = 0; id < max_pun && ldn < MAX_LOG_DEV; id++) {
1228 probe_display(1);
1229 #ifdef IM_DEBUG_PROBE
1230 printk(".");
1231 #endif
1232 if (id != subsystem_pun(host_index)) {
1233 if (get_scsi(host_index)[id][lun] != TYPE_NO_LUN && get_scsi(host_index)[id][lun] != TYPE_NO_DEVICE) {
1234 /* Only map if accepted type. Always enter for
1235 lun == 0 to get no gaps into ldn-mapping for ldn<7. */
1236 immediate_assign(host_index, id, lun, ldn, SET_LDN);
1237 get_ldn(host_index)[id][lun] = ldn; /* map ldn */
1238 if (device_exists(host_index, ldn, &ld(host_index)[ldn].block_length, &ld(host_index)[ldn].device_type)) {
1239 #ifdef CONFIG_IBMMCA_SCSI_DEV_RESET
1240 printk("resetting device at ldn=%x ... ", ldn);
1241 immediate_reset(host_index, ldn);
1242 #endif
1243 ldn++;
1244 } else {
1245 /* device vanished, probably because we don't know how to
1246 * handle it or because it has problems */
1247 if (lun > 0) {
1248 /* remove mapping */
1249 get_ldn(host_index)[id][lun] = TYPE_NO_DEVICE;
1250 immediate_assign(host_index, 0, 0, ldn, REMOVE_LDN);
1251 } else
1252 ldn++;
1253 }
1254 } else if (lun == 0) {
1255 /* map lun == 0, even if no device exists */
1256 immediate_assign(host_index, id, lun, ldn, SET_LDN);
1257 get_ldn(host_index)[id][lun] = ldn; /* map ldn */
1258 ldn++;
1259 }
1260 }
1261 }
1262 /* STEP 4: */
1263
1264 /* map remaining ldns to non-existing devices */
1265 for (lun = 1; lun < 8 && ldn < MAX_LOG_DEV; lun++)
1266 for (id = 0; id < max_pun && ldn < MAX_LOG_DEV; id++) {
1267 if (get_scsi(host_index)[id][lun] == TYPE_NO_LUN || get_scsi(host_index)[id][lun] == TYPE_NO_DEVICE) {
1268 probe_display(1);
1269 /* Map remaining ldns only to NON-existing pun,lun
1270 combinations to make sure an inquiry will fail.
1271 For MULTI_LUN, it is needed to avoid adapter autonome
1272 SCSI-remapping. */
1273 immediate_assign(host_index, id, lun, ldn, SET_LDN);
1274 get_ldn(host_index)[id][lun] = ldn;
1275 ldn++;
1276 }
1277 }
1278 #ifndef IM_DEBUG_PROBE
1279 printk("mapped.");
1280 #endif
1281 printk("\n");
1282 #ifdef IM_DEBUG_PROBE
1283 if (ibm_ansi_order)
1284 printk("IBM MCA SCSI: Device order: IBM/ANSI (pun=7 is first).\n");
1285 else
1286 printk("IBM MCA SCSI: Device order: New Industry Standard (pun=0 is first).\n");
1287 #endif
1288
1289 #ifdef IM_DEBUG_PROBE
1290 /* Show the physical and logical mapping during boot. */
1291 printk("IBM MCA SCSI: Determined SCSI-device-mapping:\n");
1292 printk(" Physical SCSI-Device Map Logical SCSI-Device Map\n");
1293 printk("ID\\LUN 0 1 2 3 4 5 6 7 ID\\LUN 0 1 2 3 4 5 6 7\n");
1294 for (id = 0; id < max_pun; id++) {
1295 printk("%2d ", id);
1296 for (lun = 0; lun < 8; lun++)
1297 printk("%2s ", ti_p(get_scsi(host_index)[id][lun]));
1298 printk(" %2d ", id);
1299 for (lun = 0; lun < 8; lun++)
1300 printk("%2s ", ti_l(get_ldn(host_index)[id][lun]));
1301 printk("\n");
1302 }
1303 #endif
1304
1305 /* assign total number of found SCSI-devices to the statistics struct */
1306 IBM_DS(host_index).total_scsi_devices = count_devices;
1307
1308 /* decide for output in /proc-filesystem, if the configuration of
1309 SCSI-devices makes dynamical reassignment of devices necessary */
1310 if (count_devices >= MAX_LOG_DEV)
1311 IBM_DS(host_index).dyn_flag = 1; /* dynamical assignment is necessary */
1312 else
1313 IBM_DS(host_index).dyn_flag = 0; /* dynamical assignment is not necessary */
1314
1315 /* If no SCSI-devices are assigned, return 1 in order to cause message. */
1316 if (ldn == 0)
1317 printk("IBM MCA SCSI: Warning: No SCSI-devices found/assigned!\n");
1318
1319 /* reset the counters for statistics on the current adapter */
1320 IBM_DS(host_index).scbs = 0;
1321 IBM_DS(host_index).long_scbs = 0;
1322 IBM_DS(host_index).total_accesses = 0;
1323 IBM_DS(host_index).total_interrupts = 0;
1324 IBM_DS(host_index).dynamical_assignments = 0;
1325 memset(IBM_DS(host_index).ldn_access, 0x0, sizeof(IBM_DS(host_index).ldn_access));
1326 memset(IBM_DS(host_index).ldn_read_access, 0x0, sizeof(IBM_DS(host_index).ldn_read_access));
1327 memset(IBM_DS(host_index).ldn_write_access, 0x0, sizeof(IBM_DS(host_index).ldn_write_access));
1328 memset(IBM_DS(host_index).ldn_inquiry_access, 0x0, sizeof(IBM_DS(host_index).ldn_inquiry_access));
1329 memset(IBM_DS(host_index).ldn_modeselect_access, 0x0, sizeof(IBM_DS(host_index).ldn_modeselect_access));
1330 memset(IBM_DS(host_index).ldn_assignments, 0x0, sizeof(IBM_DS(host_index).ldn_assignments));
1331 probe_display(0);
1332 return;
1333 }
1334
1335 static int device_exists(int host_index, int ldn, int *block_length, int *device_type)
1336 {
1337 unsigned char *buf;
1338 /* if no valid device found, return immediately with 0 */
1339 if (!(device_inquiry(host_index, ldn)))
1340 return 0;
1341 buf = (unsigned char *) (&(ld(host_index)[ldn].buf));
1342 if (*buf == TYPE_ROM) {
1343 *device_type = TYPE_ROM;
1344 *block_length = 2048; /* (standard blocksize for yellow-/red-book) */
1345 return 1;
1346 }
1347 if (*buf == TYPE_WORM) {
1348 *device_type = TYPE_WORM;
1349 *block_length = 2048;
1350 return 1;
1351 }
1352 if (*buf == TYPE_DISK) {
1353 *device_type = TYPE_DISK;
1354 if (read_capacity(host_index, ldn)) {
1355 *block_length = *(buf + 7) + (*(buf + 6) << 8) + (*(buf + 5) << 16) + (*(buf + 4) << 24);
1356 return 1;
1357 } else
1358 return 0;
1359 }
1360 if (*buf == TYPE_MOD) {
1361 *device_type = TYPE_MOD;
1362 if (read_capacity(host_index, ldn)) {
1363 *block_length = *(buf + 7) + (*(buf + 6) << 8) + (*(buf + 5) << 16) + (*(buf + 4) << 24);
1364 return 1;
1365 } else
1366 return 0;
1367 }
1368 if (*buf == TYPE_TAPE) {
1369 *device_type = TYPE_TAPE;
1370 *block_length = 0; /* not in use (setting by mt and mtst in op.) */
1371 return 1;
1372 }
1373 if (*buf == TYPE_PROCESSOR) {
1374 *device_type = TYPE_PROCESSOR;
1375 *block_length = 0; /* they set their stuff on drivers */
1376 return 1;
1377 }
1378 if (*buf == TYPE_SCANNER) {
1379 *device_type = TYPE_SCANNER;
1380 *block_length = 0; /* they set their stuff on drivers */
1381 return 1;
1382 }
1383 if (*buf == TYPE_MEDIUM_CHANGER) {
1384 *device_type = TYPE_MEDIUM_CHANGER;
1385 *block_length = 0; /* One never knows, what to expect on a medium
1386 changer device. */
1387 return 1;
1388 }
1389 return 0;
1390 }
1391
1392 static void internal_ibmmca_scsi_setup(char *str, int *ints)
1393 {
1394 int i, j, io_base, id_base;
1395 char *token;
1396
1397 io_base = 0;
1398 id_base = 0;
1399 if (str) {
1400 j = 0;
1401 while ((token = strsep(&str, ",")) != NULL) {
1402 if (!strcmp(token, "activity"))
1403 display_mode |= LED_ACTIVITY;
1404 if (!strcmp(token, "display"))
1405 display_mode |= LED_DISP;
1406 if (!strcmp(token, "adisplay"))
1407 display_mode |= LED_ADISP;
1408 if (!strcmp(token, "normal"))
1409 ibm_ansi_order = 0;
1410 if (!strcmp(token, "ansi"))
1411 ibm_ansi_order = 1;
1412 if (!strcmp(token, "fast"))
1413 global_adapter_speed = 0;
1414 if (!strcmp(token, "medium"))
1415 global_adapter_speed = 4;
1416 if (!strcmp(token, "slow"))
1417 global_adapter_speed = 7;
1418 if ((*token == '-') || (isdigit(*token))) {
1419 if (!(j % 2) && (io_base < IM_MAX_HOSTS))
1420 io_port[io_base++] = simple_strtoul(token, NULL, 0);
1421 if ((j % 2) && (id_base < IM_MAX_HOSTS))
1422 scsi_id[id_base++] = simple_strtoul(token, NULL, 0);
1423 j++;
1424 }
1425 }
1426 } else if (ints) {
1427 for (i = 0; i < IM_MAX_HOSTS && 2 * i + 2 < ints[0]; i++) {
1428 io_port[i] = ints[2 * i + 2];
1429 scsi_id[i] = ints[2 * i + 2];
1430 }
1431 }
1432 return;
1433 }
1434
1435 static int ibmmca_getinfo(char *buf, int slot, void *dev_id)
1436 {
1437 struct Scsi_Host *shpnt;
1438 int len, speciale, connectore, k;
1439 unsigned int pos[8];
1440 unsigned long flags;
1441 struct Scsi_Host *dev = dev_id;
1442
1443 spin_lock_irqsave(dev->host_lock, flags);
1444
1445 shpnt = dev; /* assign host-structure to local pointer */
1446 len = 0; /* set filled text-buffer index to 0 */
1447 /* get the _special contents of the hostdata structure */
1448 speciale = ((struct ibmmca_hostdata *) shpnt->hostdata)->_special;
1449 connectore = ((struct ibmmca_hostdata *) shpnt->hostdata)->_connector_size;
1450 for (k = 2; k < 4; k++)
1451 pos[k] = ((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k];
1452 if (speciale == FORCED_DETECTION) { /* forced detection */
1453 len += sprintf(buf + len,
1454 "Adapter category: forced detected\n" "***************************************\n" "*** Forced detected SCSI Adapter ***\n" "*** No chip-information available ***\n" "***************************************\n");
1455 } else if (speciale == INTEGRATED_SCSI) {
1456 /* if the integrated subsystem has been found automatically: */
1457 len += sprintf(buf + len,
1458 "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");
1459 } else if ((speciale >= 0) && (speciale < (sizeof(subsys_list) / sizeof(struct subsys_list_struct)))) {
1460 /* if the subsystem is a slot adapter */
1461 len += sprintf(buf + len, "Adapter category: slot-card\n" "ROM Segment Address: ");
1462 if ((pos[2] & 0xf0) == 0xf0)
1463 len += sprintf(buf + len, "off\n");
1464 else
1465 len += sprintf(buf + len, "0x%x\n", ((pos[2] & 0xf0) << 13) + 0xc0000);
1466 len += sprintf(buf + len, "Chip status: %s\n", (pos[2] & 1) ? "enabled" : "disabled");
1467 len += sprintf(buf + len, "Adapter I/O Offset: 0x%x\n", ((pos[2] & 0x0e) << 2));
1468 } else {
1469 len += sprintf(buf + len, "Adapter category: unknown\n");
1470 }
1471 /* common subsystem information to write to the slotn file */
1472 len += sprintf(buf + len, "Subsystem PUN: %d\n", shpnt->this_id);
1473 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));
1474 len += sprintf(buf + len, "MCA-slot size: %d bits", connectore);
1475 /* Now make sure, the bufferlength is devidable by 4 to avoid
1476 * paging problems of the buffer. */
1477 while (len % sizeof(int) != (sizeof(int) - 1))
1478 len += sprintf(buf + len, " ");
1479 len += sprintf(buf + len, "\n");
1480
1481 spin_unlock_irqrestore(shpnt->host_lock, flags);
1482
1483 return len;
1484 }
1485
1486 int ibmmca_detect(struct scsi_host_template * scsi_template)
1487 {
1488 struct Scsi_Host *shpnt;
1489 int port, id, i, j, k, list_size, slot;
1490 int devices_on_irq_11 = 0;
1491 int devices_on_irq_14 = 0;
1492 int IRQ14_registered = 0;
1493 int IRQ11_registered = 0;
1494
1495 found = 0; /* make absolutely sure, that found is set to 0 */
1496
1497 /* First of all, print the version number of the driver. This is
1498 * important to allow better user bugreports in case of already
1499 * having problems with the MCA_bus probing. */
1500 printk(KERN_INFO "IBM MCA SCSI: Version %s\n", IBMMCA_SCSI_DRIVER_VERSION);
1501 /* if this is not MCA machine, return "nothing found" */
1502 if (!MCA_bus) {
1503 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");
1504 return 0;
1505 }
1506
1507 #ifdef MODULE
1508 /* If the driver is run as module, read from conf.modules or cmd-line */
1509 if (boot_options)
1510 option_setup(boot_options);
1511 #endif
1512
1513 /* get interrupt request level */
1514 if (request_irq(IM_IRQ, interrupt_handler, SA_SHIRQ, "ibmmcascsi", hosts)) {
1515 printk(KERN_ERR "IBM MCA SCSI: Unable to get shared IRQ %d.\n", IM_IRQ);
1516 return 0;
1517 } else
1518 IRQ14_registered++;
1519
1520 /* if ibmmcascsi setup option was passed to kernel, return "found" */
1521 for (i = 0; i < IM_MAX_HOSTS; i++)
1522 if (io_port[i] > 0 && scsi_id[i] >= 0 && scsi_id[i] < 8) {
1523 printk("IBM MCA SCSI: forced detected SCSI Adapter, io=0x%x, scsi id=%d.\n", io_port[i], scsi_id[i]);
1524 if ((shpnt = ibmmca_register(scsi_template, io_port[i], scsi_id[i], FORCED_DETECTION, "forced detected SCSI Adapter"))) {
1525 for (k = 2; k < 7; k++)
1526 ((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k] = 0;
1527 ((struct ibmmca_hostdata *) shpnt->hostdata)->_special = FORCED_DETECTION;
1528 mca_set_adapter_name(MCA_INTEGSCSI, "forced detected SCSI Adapter");
1529 mca_set_adapter_procfn(MCA_INTEGSCSI, (MCA_ProcFn) ibmmca_getinfo, shpnt);
1530 mca_mark_as_used(MCA_INTEGSCSI);
1531 devices_on_irq_14++;
1532 }
1533 }
1534 if (found)
1535 return found;
1536
1537 /* The POS2-register of all PS/2 model SCSI-subsystems has the following
1538 * interpretation of bits:
1539 * Bit 7 - 4 : Chip Revision ID (Release)
1540 * Bit 3 - 2 : Reserved
1541 * Bit 1 : 8k NVRAM Disabled
1542 * Bit 0 : Chip Enable (EN-Signal)
1543 * The POS3-register is interpreted as follows:
1544 * Bit 7 - 5 : SCSI ID
1545 * Bit 4 : Reserved = 0
1546 * Bit 3 - 0 : Reserved = 0
1547 * (taken from "IBM, PS/2 Hardware Interface Technical Reference, Common
1548 * Interfaces (1991)").
1549 * In short words, this means, that IBM PS/2 machines only support
1550 * 1 single subsystem by default. The slot-adapters must have another
1551 * configuration on pos2. Here, one has to assume the following
1552 * things for POS2-register:
1553 * Bit 7 - 4 : Chip Revision ID (Release)
1554 * Bit 3 - 1 : port offset factor
1555 * Bit 0 : Chip Enable (EN-Signal)
1556 * As I found a patch here, setting the IO-registers to 0x3540 forced,
1557 * as there was a 0x05 in POS2 on a model 56, I assume, that the
1558 * port 0x3540 must be fix for integrated SCSI-controllers.
1559 * Ok, this discovery leads to the following implementation: (M.Lang) */
1560
1561 /* first look for the IBM SCSI integrated subsystem on the motherboard */
1562 for (j = 0; j < 8; j++) /* read the pos-information */
1563 pos[j] = mca_read_stored_pos(MCA_INTEGSCSI, j);
1564 /* pos2 = pos3 = 0xff if there is no integrated SCSI-subsystem present, but
1565 * if we ignore the settings of all surrounding pos registers, it is not
1566 * completely sufficient to only check pos2 and pos3. */
1567 /* Therefore, now the following if statement is used to
1568 * make sure, we see a real integrated onboard SCSI-interface and no
1569 * internal system information, which gets mapped to some pos registers
1570 * on models 95xx. */
1571 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)) {
1572 if ((pos[2] & 1) == 1) /* is the subsystem chip enabled ? */
1573 port = IM_IO_PORT;
1574 else { /* if disabled, no IRQs will be generated, as the chip won't
1575 * listen to the incoming commands and will do really nothing,
1576 * except for listening to the pos-register settings. If this
1577 * happens, I need to hugely think about it, as one has to
1578 * write something to the MCA-Bus pos register in order to
1579 * enable the chip. Normally, IBM-SCSI won't pass the POST,
1580 * when the chip is disabled (see IBM tech. ref.). */
1581 port = IM_IO_PORT; /* anyway, set the portnumber and warn */
1582 printk("IBM MCA SCSI: WARNING - Your SCSI-subsystem is disabled!\n" " SCSI-operations may not work.\n");
1583 }
1584 id = (pos[3] & 0xe0) >> 5; /* this is correct and represents the PUN */
1585 /* give detailed information on the subsystem. This helps me
1586 * additionally during debugging and analyzing bug-reports. */
1587 printk(KERN_INFO "IBM MCA SCSI: IBM Integrated SCSI Controller ffound, io=0x%x, scsi id=%d,\n", port, id);
1588 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.");
1589
1590 /* register the found integrated SCSI-subsystem */
1591 if ((shpnt = ibmmca_register(scsi_template, port, id, INTEGRATED_SCSI, "IBM Integrated SCSI Controller")))
1592 {
1593 for (k = 2; k < 7; k++)
1594 ((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k] = pos[k];
1595 ((struct ibmmca_hostdata *) shpnt->hostdata)->_special = INTEGRATED_SCSI;
1596 mca_set_adapter_name(MCA_INTEGSCSI, "IBM Integrated SCSI Controller");
1597 mca_set_adapter_procfn(MCA_INTEGSCSI, (MCA_ProcFn) ibmmca_getinfo, shpnt);
1598 mca_mark_as_used(MCA_INTEGSCSI);
1599 devices_on_irq_14++;
1600 }
1601 }
1602
1603 /* now look for other adapters in MCA slots, */
1604 /* determine the number of known IBM-SCSI-subsystem types */
1605 /* see the pos[2] dependence to get the adapter port-offset. */
1606 list_size = sizeof(subsys_list) / sizeof(struct subsys_list_struct);
1607 for (i = 0; i < list_size; i++) {
1608 /* scan each slot for a fitting adapter id */
1609 slot = 0; /* start at slot 0 */
1610 while ((slot = mca_find_adapter(subsys_list[i].mca_id, slot))
1611 != MCA_NOTFOUND) { /* scan through all slots */
1612 for (j = 0; j < 8; j++) /* read the pos-information */
1613 pos[j] = mca_read_stored_pos(slot, j);
1614 if ((pos[2] & 1) == 1)
1615 /* is the subsystem chip enabled ? */
1616 /* (explanations see above) */
1617 port = IM_IO_PORT + ((pos[2] & 0x0e) << 2);
1618 else {
1619 /* anyway, set the portnumber and warn */
1620 port = IM_IO_PORT + ((pos[2] & 0x0e) << 2);
1621 printk(KERN_WARNING "IBM MCA SCSI: WARNING - Your SCSI-subsystem is disabled!\n");
1622 printk(KERN_WARNING " SCSI-operations may not work.\n");
1623 }
1624 if ((i == IBM_SCSI2_FW) && (pos[6] != 0)) {
1625 printk(KERN_ERR "IBM MCA SCSI: ERROR - Wrong POS(6)-register setting!\n");
1626 printk(KERN_ERR " Impossible to determine adapter PUN!\n");
1627 printk(KERN_ERR " Guessing adapter PUN = 7.\n");
1628 id = 7;
1629 } else {
1630 id = (pos[3] & 0xe0) >> 5; /* get subsystem PUN */
1631 if (i == IBM_SCSI2_FW) {
1632 id |= (pos[3] & 0x10) >> 1; /* get subsystem PUN high-bit
1633 * for F/W adapters */
1634 }
1635 }
1636 if ((i == IBM_SCSI2_FW) && (pos[4] & 0x01) && (pos[6] == 0)) {
1637 /* IRQ11 is used by SCSI-2 F/W Adapter/A */
1638 printk(KERN_DEBUG "IBM MCA SCSI: SCSI-2 F/W adapter needs IRQ 11.\n");
1639 /* get interrupt request level */
1640 if (request_irq(IM_IRQ_FW, interrupt_handler, SA_SHIRQ, "ibmmcascsi", hosts)) {
1641 printk(KERN_ERR "IBM MCA SCSI: Unable to get shared IRQ %d.\n", IM_IRQ_FW);
1642 } else
1643 IRQ11_registered++;
1644 }
1645 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);
1646 if ((pos[2] & 0xf0) == 0xf0)
1647 printk(KERN_DEBUG" ROM Addr.=off,");
1648 else
1649 printk(KERN_DEBUG " ROM Addr.=0x%x,", ((pos[2] & 0xf0) << 13) + 0xc0000);
1650 printk(KERN_DEBUG " port-offset=0x%x, subsystem=%s\n", ((pos[2] & 0x0e) << 2), (pos[2] & 1) ? "enabled." : "disabled.");
1651
1652 /* register the hostadapter */
1653 if ((shpnt = ibmmca_register(scsi_template, port, id, i, subsys_list[i].description))) {
1654 for (k = 2; k < 8; k++)
1655 ((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k] = pos[k];
1656 ((struct ibmmca_hostdata *) shpnt->hostdata)->_special = i;
1657 mca_set_adapter_name(slot, subsys_list[i].description);
1658 mca_set_adapter_procfn(slot, (MCA_ProcFn) ibmmca_getinfo, shpnt);
1659 mca_mark_as_used(slot);
1660 if ((i == IBM_SCSI2_FW) && (pos[4] & 0x01) && (pos[6] == 0))
1661 devices_on_irq_11++;
1662 else
1663 devices_on_irq_14++;
1664 }
1665 slot++; /* advance to next slot */
1666 } /* advance to next adapter id in the list of IBM-SCSI-subsystems */
1667 }
1668
1669 /* now check for SCSI-adapters, mapped to the integrated SCSI
1670 * area. E.g. a W/Cache in MCA-slot 9(!). Do the check correct here,
1671 * as this is a known effect on some models 95xx. */
1672 list_size = sizeof(subsys_list) / sizeof(struct subsys_list_struct);
1673 for (i = 0; i < list_size; i++) {
1674 /* scan each slot for a fitting adapter id */
1675 slot = mca_find_adapter(subsys_list[i].mca_id, MCA_INTEGSCSI);
1676 if (slot != MCA_NOTFOUND) { /* scan through all slots */
1677 for (j = 0; j < 8; j++) /* read the pos-information */
1678 pos[j] = mca_read_stored_pos(slot, j);
1679 if ((pos[2] & 1) == 1) { /* is the subsystem chip enabled ? */
1680 /* (explanations see above) */
1681 port = IM_IO_PORT + ((pos[2] & 0x0e) << 2);
1682 } else { /* anyway, set the portnumber and warn */
1683 port = IM_IO_PORT + ((pos[2] & 0x0e) << 2);
1684 printk(KERN_WARNING "IBM MCA SCSI: WARNING - Your SCSI-subsystem is disabled!\n");
1685 printk(KERN_WARNING " SCSI-operations may not work.\n");
1686 }
1687 if ((i == IBM_SCSI2_FW) && (pos[6] != 0)) {
1688 printk(KERN_ERR "IBM MCA SCSI: ERROR - Wrong POS(6)-register setting!\n");
1689 printk(KERN_ERR " Impossible to determine adapter PUN!\n");
1690 printk(KERN_ERR " Guessing adapter PUN = 7.\n");
1691 id = 7;
1692 } else {
1693 id = (pos[3] & 0xe0) >> 5; /* get subsystem PUN */
1694 if (i == IBM_SCSI2_FW)
1695 id |= (pos[3] & 0x10) >> 1; /* get subsystem PUN high-bit
1696 * for F/W adapters */
1697 }
1698 if ((i == IBM_SCSI2_FW) && (pos[4] & 0x01) && (pos[6] == 0)) {
1699 /* IRQ11 is used by SCSI-2 F/W Adapter/A */
1700 printk(KERN_DEBUG "IBM MCA SCSI: SCSI-2 F/W adapter needs IRQ 11.\n");
1701 /* get interrupt request level */
1702 if (request_irq(IM_IRQ_FW, interrupt_handler, SA_SHIRQ, "ibmmcascsi", hosts))
1703 printk(KERN_ERR "IBM MCA SCSI: Unable to get shared IRQ %d.\n", IM_IRQ_FW);
1704 else
1705 IRQ11_registered++;
1706 }
1707 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);
1708 if ((pos[2] & 0xf0) == 0xf0)
1709 printk(KERN_DEBUG " ROM Addr.=off,");
1710 else
1711 printk(KERN_DEBUG " ROM Addr.=0x%x,", ((pos[2] & 0xf0) << 13) + 0xc0000);
1712 printk(KERN_DEBUG " port-offset=0x%x, subsystem=%s\n", ((pos[2] & 0x0e) << 2), (pos[2] & 1) ? "enabled." : "disabled.");
1713
1714 /* register the hostadapter */
1715 if ((shpnt = ibmmca_register(scsi_template, port, id, i, subsys_list[i].description))) {
1716 for (k = 2; k < 7; k++)
1717 ((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k] = pos[k];
1718 ((struct ibmmca_hostdata *) shpnt->hostdata)->_special = i;
1719 mca_set_adapter_name(slot, subsys_list[i].description);
1720 mca_set_adapter_procfn(slot, (MCA_ProcFn) ibmmca_getinfo, shpnt);
1721 mca_mark_as_used(slot);
1722 if ((i == IBM_SCSI2_FW) && (pos[4] & 0x01) && (pos[6] == 0))
1723 devices_on_irq_11++;
1724 else
1725 devices_on_irq_14++;
1726 }
1727 slot++; /* advance to next slot */
1728 } /* advance to next adapter id in the list of IBM-SCSI-subsystems */
1729 }
1730 if (IRQ11_registered && !devices_on_irq_11)
1731 free_irq(IM_IRQ_FW, hosts); /* no devices on IRQ 11 */
1732 if (IRQ14_registered && !devices_on_irq_14)
1733 free_irq(IM_IRQ, hosts); /* no devices on IRQ 14 */
1734 if (!devices_on_irq_11 && !devices_on_irq_14)
1735 printk(KERN_WARNING "IBM MCA SCSI: No IBM SCSI-subsystem adapter attached.\n");
1736 return found; /* return the number of found SCSI hosts. Should be 1 or 0. */
1737 }
1738
1739 static struct Scsi_Host *ibmmca_register(struct scsi_host_template * scsi_template, int port, int id, int adaptertype, char *hostname)
1740 {
1741 struct Scsi_Host *shpnt;
1742 int i, j;
1743 unsigned int ctrl;
1744
1745 /* check I/O region */
1746 if (!request_region(port, IM_N_IO_PORT, hostname)) {
1747 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);
1748 return NULL;
1749 }
1750
1751 /* register host */
1752 shpnt = scsi_register(scsi_template, sizeof(struct ibmmca_hostdata));
1753 if (!shpnt) {
1754 printk(KERN_ERR "IBM MCA SCSI: Unable to register host.\n");
1755 release_region(port, IM_N_IO_PORT);
1756 return NULL;
1757 }
1758
1759 /* request I/O region */
1760 hosts[found] = shpnt; /* add new found hostadapter to the list */
1761 special(found) = adaptertype; /* important assignment or else crash! */
1762 subsystem_connector_size(found) = 0; /* preset slot-size */
1763 shpnt->irq = IM_IRQ; /* assign necessary stuff for the adapter */
1764 shpnt->io_port = port;
1765 shpnt->n_io_port = IM_N_IO_PORT;
1766 shpnt->this_id = id;
1767 shpnt->max_id = 8; /* 8 PUNs are default */
1768 /* now, the SCSI-subsystem is connected to Linux */
1769
1770 ctrl = (unsigned int) (inb(IM_CTR_REG(found))); /* get control-register status */
1771 #ifdef IM_DEBUG_PROBE
1772 printk("IBM MCA SCSI: Control Register contents: %x, status: %x\n", ctrl, inb(IM_STAT_REG(found)));
1773 printk("IBM MCA SCSI: This adapters' POS-registers: ");
1774 for (i = 0; i < 8; i++)
1775 printk("%x ", pos[i]);
1776 printk("\n");
1777 #endif
1778 reset_status(found) = IM_RESET_NOT_IN_PROGRESS;
1779
1780 for (i = 0; i < 16; i++) /* reset the tables */
1781 for (j = 0; j < 8; j++)
1782 get_ldn(found)[i][j] = MAX_LOG_DEV;
1783
1784 /* check which logical devices exist */
1785 /* after this line, local interrupting is possible: */
1786 local_checking_phase_flag(found) = 1;
1787 check_devices(found, adaptertype); /* call by value, using the global variable hosts */
1788 local_checking_phase_flag(found) = 0;
1789 found++; /* now increase index to be prepared for next found subsystem */
1790 /* an ibm mca subsystem has been detected */
1791 return shpnt;
1792 }
1793
1794 static int ibmmca_release(struct Scsi_Host *shpnt)
1795 {
1796 release_region(shpnt->io_port, shpnt->n_io_port);
1797 if (!(--found))
1798 free_irq(shpnt->irq, hosts);
1799 return 0;
1800 }
1801
1802 /* The following routine is the SCSI command queue for the midlevel driver */
1803 static int ibmmca_queuecommand(Scsi_Cmnd * cmd, void (*done) (Scsi_Cmnd *))
1804 {
1805 unsigned int ldn;
1806 unsigned int scsi_cmd;
1807 struct im_scb *scb;
1808 struct Scsi_Host *shpnt;
1809 int current_ldn;
1810 int id, lun;
1811 int target;
1812 int host_index;
1813 int max_pun;
1814 int i;
1815 struct scatterlist *sl;
1816
1817 shpnt = cmd->device->host;
1818 /* search for the right hostadapter */
1819 for (host_index = 0; hosts[host_index] && hosts[host_index]->host_no != shpnt->host_no; host_index++);
1820
1821 if (!hosts[host_index]) { /* invalid hostadapter descriptor address */
1822 cmd->result = DID_NO_CONNECT << 16;
1823 if (done)
1824 done(cmd);
1825 return 0;
1826 }
1827 max_pun = subsystem_maxid(host_index);
1828 if (ibm_ansi_order) {
1829 target = max_pun - 1 - cmd->device->id;
1830 if ((target <= subsystem_pun(host_index)) && (cmd->device->id <= subsystem_pun(host_index)))
1831 target--;
1832 else if ((target >= subsystem_pun(host_index)) && (cmd->device->id >= subsystem_pun(host_index)))
1833 target++;
1834 } else
1835 target = cmd->device->id;
1836
1837 /* if (target,lun) is NO LUN or not existing at all, return error */
1838 if ((get_scsi(host_index)[target][cmd->device->lun] == TYPE_NO_LUN) || (get_scsi(host_index)[target][cmd->device->lun] == TYPE_NO_DEVICE)) {
1839 cmd->result = DID_NO_CONNECT << 16;
1840 if (done)
1841 done(cmd);
1842 return 0;
1843 }
1844
1845 /*if (target,lun) unassigned, do further checks... */
1846 ldn = get_ldn(host_index)[target][cmd->device->lun];
1847 if (ldn >= MAX_LOG_DEV) { /* on invalid ldn do special stuff */
1848 if (ldn > MAX_LOG_DEV) { /* dynamical remapping if ldn unassigned */
1849 current_ldn = next_ldn(host_index); /* stop-value for one circle */
1850 while (ld(host_index)[next_ldn(host_index)].cmd) { /* search for a occupied, but not in */
1851 /* command-processing ldn. */
1852 next_ldn(host_index)++;
1853 if (next_ldn(host_index) >= MAX_LOG_DEV)
1854 next_ldn(host_index) = 7;
1855 if (current_ldn == next_ldn(host_index)) { /* One circle done ? */
1856 /* no non-processing ldn found */
1857 scmd_printk(KERN_WARNING, cmd,
1858 "IBM MCA SCSI: Cannot assign SCSI-device dynamically!\n"
1859 " On ldn 7-14 SCSI-commands everywhere in progress.\n"
1860 " Reporting DID_NO_CONNECT for device.\n");
1861 cmd->result = DID_NO_CONNECT << 16; /* return no connect */
1862 if (done)
1863 done(cmd);
1864 return 0;
1865 }
1866 }
1867
1868 /* unmap non-processing ldn */
1869 for (id = 0; id < max_pun; id++)
1870 for (lun = 0; lun < 8; lun++) {
1871 if (get_ldn(host_index)[id][lun] == next_ldn(host_index)) {
1872 get_ldn(host_index)[id][lun] = TYPE_NO_DEVICE;
1873 get_scsi(host_index)[id][lun] = TYPE_NO_DEVICE;
1874 /* unmap entry */
1875 }
1876 }
1877 /* set reduced interrupt_handler-mode for checking */
1878 local_checking_phase_flag(host_index) = 1;
1879 /* map found ldn to pun,lun */
1880 get_ldn(host_index)[target][cmd->device->lun] = next_ldn(host_index);
1881 /* change ldn to the right value, that is now next_ldn */
1882 ldn = next_ldn(host_index);
1883 /* unassign all ldns (pun,lun,ldn does not matter for remove) */
1884 immediate_assign(host_index, 0, 0, 0, REMOVE_LDN);
1885 /* set only LDN for remapped device */
1886 immediate_assign(host_index, target, cmd->device->lun, ldn, SET_LDN);
1887 /* get device information for ld[ldn] */
1888 if (device_exists(host_index, ldn, &ld(host_index)[ldn].block_length, &ld(host_index)[ldn].device_type)) {
1889 ld(host_index)[ldn].cmd = NULL; /* To prevent panic set 0, because
1890 devices that were not assigned,
1891 should have nothing in progress. */
1892 get_scsi(host_index)[target][cmd->device->lun] = ld(host_index)[ldn].device_type;
1893 /* increase assignment counters for statistics in /proc */
1894 IBM_DS(host_index).dynamical_assignments++;
1895 IBM_DS(host_index).ldn_assignments[ldn]++;
1896 } else
1897 /* panic here, because a device, found at boottime has
1898 vanished */
1899 panic("IBM MCA SCSI: ldn=0x%x, SCSI-device on (%d,%d) vanished!\n", ldn, target, cmd->device->lun);
1900 /* unassign again all ldns (pun,lun,ldn does not matter for remove) */
1901 immediate_assign(host_index, 0, 0, 0, REMOVE_LDN);
1902 /* remap all ldns, as written in the pun/lun table */
1903 lun = 0;
1904 #ifdef CONFIG_SCSI_MULTI_LUN
1905 for (lun = 0; lun < 8; lun++)
1906 #endif
1907 for (id = 0; id < max_pun; id++) {
1908 if (get_ldn(host_index)[id][lun] <= MAX_LOG_DEV)
1909 immediate_assign(host_index, id, lun, get_ldn(host_index)[id][lun], SET_LDN);
1910 }
1911 /* set back to normal interrupt_handling */
1912 local_checking_phase_flag(host_index) = 0;
1913 #ifdef IM_DEBUG_PROBE
1914 /* Information on syslog terminal */
1915 printk("IBM MCA SCSI: ldn=0x%x dynamically reassigned to (%d,%d).\n", ldn, target, cmd->device->lun);
1916 #endif
1917 /* increase next_ldn for next dynamical assignment */
1918 next_ldn(host_index)++;
1919 if (next_ldn(host_index) >= MAX_LOG_DEV)
1920 next_ldn(host_index) = 7;
1921 } else { /* wall against Linux accesses to the subsystem adapter */
1922 cmd->result = DID_BAD_TARGET << 16;
1923 if (done)
1924 done(cmd);
1925 return 0;
1926 }
1927 }
1928
1929 /*verify there is no command already in progress for this log dev */
1930 if (ld(host_index)[ldn].cmd)
1931 panic("IBM MCA SCSI: cmd already in progress for this ldn.\n");
1932
1933 /*save done in cmd, and save cmd for the interrupt handler */
1934 cmd->scsi_done = done;
1935 ld(host_index)[ldn].cmd = cmd;
1936
1937 /*fill scb information independent of the scsi command */
1938 scb = &(ld(host_index)[ldn].scb);
1939 ld(host_index)[ldn].tsb.dev_status = 0;
1940 scb->enable = IM_REPORT_TSB_ONLY_ON_ERROR | IM_RETRY_ENABLE;
1941 scb->tsb_adr = isa_virt_to_bus(&(ld(host_index)[ldn].tsb));
1942 scsi_cmd = cmd->cmnd[0];
1943
1944 if (cmd->use_sg) {
1945 i = cmd->use_sg;
1946 sl = (struct scatterlist *) (cmd->request_buffer);
1947 if (i > 16)
1948 panic("IBM MCA SCSI: scatter-gather list too long.\n");
1949 while (--i >= 0) {
1950 ld(host_index)[ldn].sge[i].address = (void *) (isa_page_to_bus(sl[i].page) + sl[i].offset);
1951 ld(host_index)[ldn].sge[i].byte_length = sl[i].length;
1952 }
1953 scb->enable |= IM_POINTER_TO_LIST;
1954 scb->sys_buf_adr = isa_virt_to_bus(&(ld(host_index)[ldn].sge[0]));
1955 scb->sys_buf_length = cmd->use_sg * sizeof(struct im_sge);
1956 } else {
1957 scb->sys_buf_adr = isa_virt_to_bus(cmd->request_buffer);
1958 /* recent Linux midlevel SCSI places 1024 byte for inquiry
1959 * command. Far too much for old PS/2 hardware. */
1960 switch (scsi_cmd) {
1961 /* avoid command errors by setting bufferlengths to
1962 * ANSI-standard. Beware of forcing it to 255,
1963 * this could SEGV the kernel!!! */
1964 case INQUIRY:
1965 case REQUEST_SENSE:
1966 case MODE_SENSE:
1967 case MODE_SELECT:
1968 if (cmd->request_bufflen > 255)
1969 scb->sys_buf_length = 255;
1970 else
1971 scb->sys_buf_length = cmd->request_bufflen;
1972 break;
1973 case TEST_UNIT_READY:
1974 scb->sys_buf_length = 0;
1975 break;
1976 default:
1977 scb->sys_buf_length = cmd->request_bufflen;
1978 break;
1979 }
1980 }
1981 /*fill scb information dependent on scsi command */
1982
1983 #ifdef IM_DEBUG_CMD
1984 printk("issue scsi cmd=%02x to ldn=%d\n", scsi_cmd, ldn);
1985 #endif
1986
1987 /* for specific device-type debugging: */
1988 #ifdef IM_DEBUG_CMD_SPEC_DEV
1989 if (ld(host_index)[ldn].device_type == IM_DEBUG_CMD_DEVICE)
1990 printk("(SCSI-device-type=0x%x) issue scsi cmd=%02x to ldn=%d\n", ld(host_index)[ldn].device_type, scsi_cmd, ldn);
1991 #endif
1992
1993 /* for possible panics store current command */
1994 last_scsi_command(host_index)[ldn] = scsi_cmd;
1995 last_scsi_type(host_index)[ldn] = IM_SCB;
1996 /* update statistical info */
1997 IBM_DS(host_index).total_accesses++;
1998 IBM_DS(host_index).ldn_access[ldn]++;
1999
2000 switch (scsi_cmd) {
2001 case READ_6:
2002 case WRITE_6:
2003 case READ_10:
2004 case WRITE_10:
2005 case READ_12:
2006 case WRITE_12:
2007 /* Distinguish between disk and other devices. Only disks (that are the
2008 most frequently accessed devices) should be supported by the
2009 IBM-SCSI-Subsystem commands. */
2010 switch (ld(host_index)[ldn].device_type) {
2011 case TYPE_DISK: /* for harddisks enter here ... */
2012 case TYPE_MOD: /* ... try it also for MO-drives (send flames as */
2013 /* you like, if this won't work.) */
2014 if (scsi_cmd == READ_6 || scsi_cmd == READ_10 || scsi_cmd == READ_12) {
2015 /* read command preparations */
2016 scb->enable |= IM_READ_CONTROL;
2017 IBM_DS(host_index).ldn_read_access[ldn]++; /* increase READ-access on ldn stat. */
2018 scb->command = IM_READ_DATA_CMD | IM_NO_DISCONNECT;
2019 } else { /* write command preparations */
2020 IBM_DS(host_index).ldn_write_access[ldn]++; /* increase write-count on ldn stat. */
2021 scb->command = IM_WRITE_DATA_CMD | IM_NO_DISCONNECT;
2022 }
2023 if (scsi_cmd == READ_6 || scsi_cmd == WRITE_6) {
2024 scb->u1.log_blk_adr = (((unsigned) cmd->cmnd[3]) << 0) | (((unsigned) cmd->cmnd[2]) << 8) | ((((unsigned) cmd->cmnd[1]) & 0x1f) << 16);
2025 scb->u2.blk.count = (unsigned) cmd->cmnd[4];
2026 } else {
2027 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);
2028 scb->u2.blk.count = (((unsigned) cmd->cmnd[8]) << 0) | (((unsigned) cmd->cmnd[7]) << 8);
2029 }
2030 last_scsi_logical_block(host_index)[ldn] = scb->u1.log_blk_adr;
2031 last_scsi_blockcount(host_index)[ldn] = scb->u2.blk.count;
2032 scb->u2.blk.length = ld(host_index)[ldn].block_length;
2033 break;
2034 /* for other devices, enter here. Other types are not known by
2035 Linux! TYPE_NO_LUN is forbidden as valid device. */
2036 case TYPE_ROM:
2037 case TYPE_TAPE:
2038 case TYPE_PROCESSOR:
2039 case TYPE_WORM:
2040 case TYPE_SCANNER:
2041 case TYPE_MEDIUM_CHANGER:
2042 /* If there is a sequential-device, IBM recommends to use
2043 IM_OTHER_SCSI_CMD_CMD instead of subsystem READ/WRITE.
2044 This includes CD-ROM devices, too, due to the partial sequential
2045 read capabilities. */
2046 scb->command = IM_OTHER_SCSI_CMD_CMD;
2047 if (scsi_cmd == READ_6 || scsi_cmd == READ_10 || scsi_cmd == READ_12)
2048 /* enable READ */
2049 scb->enable |= IM_READ_CONTROL;
2050 scb->enable |= IM_BYPASS_BUFFER;
2051 scb->u1.scsi_cmd_length = cmd->cmd_len;
2052 memcpy(scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len);
2053 last_scsi_type(host_index)[ldn] = IM_LONG_SCB;
2054 /* Read/write on this non-disk devices is also displayworthy,
2055 so flash-up the LED/display. */
2056 break;
2057 }
2058 break;
2059 case INQUIRY:
2060 IBM_DS(host_index).ldn_inquiry_access[ldn]++;
2061 scb->command = IM_DEVICE_INQUIRY_CMD;
2062 scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER;
2063 scb->u1.log_blk_adr = 0;
2064 break;
2065 case TEST_UNIT_READY:
2066 scb->command = IM_OTHER_SCSI_CMD_CMD;
2067 scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER;
2068 scb->u1.log_blk_adr = 0;
2069 scb->u1.scsi_cmd_length = 6;
2070 memcpy(scb->u2.scsi_command, cmd->cmnd, 6);
2071 last_scsi_type(host_index)[ldn] = IM_LONG_SCB;
2072 break;
2073 case READ_CAPACITY:
2074 /* the length of system memory buffer must be exactly 8 bytes */
2075 scb->command = IM_READ_CAPACITY_CMD;
2076 scb->enable |= IM_READ_CONTROL | IM_BYPASS_BUFFER;
2077 if (scb->sys_buf_length > 8)
2078 scb->sys_buf_length = 8;
2079 break;
2080 /* Commands that need read-only-mode (system <- device): */
2081 case REQUEST_SENSE:
2082 scb->command = IM_REQUEST_SENSE_CMD;
2083 scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER;
2084 break;
2085 /* Commands that need write-only-mode (system -> device): */
2086 case MODE_SELECT:
2087 case MODE_SELECT_10:
2088 IBM_DS(host_index).ldn_modeselect_access[ldn]++;
2089 scb->command = IM_OTHER_SCSI_CMD_CMD;
2090 scb->enable |= IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER; /*Select needs WRITE-enabled */
2091 scb->u1.scsi_cmd_length = cmd->cmd_len;
2092 memcpy(scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len);
2093 last_scsi_type(host_index)[ldn] = IM_LONG_SCB;
2094 break;
2095 /* For other commands, read-only is useful. Most other commands are
2096 running without an input-data-block. */
2097 default:
2098 scb->command = IM_OTHER_SCSI_CMD_CMD;
2099 scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER;
2100 scb->u1.scsi_cmd_length = cmd->cmd_len;
2101 memcpy(scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len);
2102 last_scsi_type(host_index)[ldn] = IM_LONG_SCB;
2103 break;
2104 }
2105 /*issue scb command, and return */
2106 if (++disk_rw_in_progress == 1)
2107 PS2_DISK_LED_ON(shpnt->host_no, target);
2108
2109 if (last_scsi_type(host_index)[ldn] == IM_LONG_SCB) {
2110 issue_cmd(host_index, isa_virt_to_bus(scb), IM_LONG_SCB | ldn);
2111 IBM_DS(host_index).long_scbs++;
2112 } else {
2113 issue_cmd(host_index, isa_virt_to_bus(scb), IM_SCB | ldn);
2114 IBM_DS(host_index).scbs++;
2115 }
2116 return 0;
2117 }
2118
2119 static int __ibmmca_abort(Scsi_Cmnd * cmd)
2120 {
2121 /* Abort does not work, as the adapter never generates an interrupt on
2122 * whatever situation is simulated, even when really pending commands
2123 * are running on the adapters' hardware ! */
2124
2125 struct Scsi_Host *shpnt;
2126 unsigned int ldn;
2127 void (*saved_done) (Scsi_Cmnd *);
2128 int target;
2129 int host_index;
2130 int max_pun;
2131 unsigned long imm_command;
2132
2133 #ifdef IM_DEBUG_PROBE
2134 printk("IBM MCA SCSI: Abort subroutine called...\n");
2135 #endif
2136
2137 shpnt = cmd->device->host;
2138 /* search for the right hostadapter */
2139 for (host_index = 0; hosts[host_index] && hosts[host_index]->host_no != shpnt->host_no; host_index++);
2140
2141 if (!hosts[host_index]) { /* invalid hostadapter descriptor address */
2142 cmd->result = DID_NO_CONNECT << 16;
2143 if (cmd->scsi_done)
2144 (cmd->scsi_done) (cmd);
2145 shpnt = cmd->device->host;
2146 #ifdef IM_DEBUG_PROBE
2147 printk(KERN_DEBUG "IBM MCA SCSI: Abort adapter selection failed!\n");
2148 #endif
2149 return SUCCESS;
2150 }
2151 max_pun = subsystem_maxid(host_index);
2152 if (ibm_ansi_order) {
2153 target = max_pun - 1 - cmd->device->id;
2154 if ((target <= subsystem_pun(host_index)) && (cmd->device->id <= subsystem_pun(host_index)))
2155 target--;
2156 else if ((target >= subsystem_pun(host_index)) && (cmd->device->id >= subsystem_pun(host_index)))
2157 target++;
2158 } else
2159 target = cmd->device->id;
2160
2161 /* get logical device number, and disable system interrupts */
2162 printk(KERN_WARNING "IBM MCA SCSI: Sending abort to device pun=%d, lun=%d.\n", target, cmd->device->lun);
2163 ldn = get_ldn(host_index)[target][cmd->device->lun];
2164
2165 /*if cmd for this ldn has already finished, no need to abort */
2166 if (!ld(host_index)[ldn].cmd) {
2167 return SUCCESS;
2168 }
2169
2170 /* Clear ld.cmd, save done function, install internal done,
2171 * send abort immediate command (this enables sys. interrupts),
2172 * and wait until the interrupt arrives.
2173 */
2174 saved_done = cmd->scsi_done;
2175 cmd->scsi_done = internal_done;
2176 cmd->SCp.Status = 0;
2177 last_scsi_command(host_index)[ldn] = IM_ABORT_IMM_CMD;
2178 last_scsi_type(host_index)[ldn] = IM_IMM_CMD;
2179 imm_command = inl(IM_CMD_REG(host_index));
2180 imm_command &= (unsigned long) (0xffff0000); /* mask reserved stuff */
2181 imm_command |= (unsigned long) (IM_ABORT_IMM_CMD);
2182 /* must wait for attention reg not busy */
2183 /* FIXME - timeout, politeness */
2184 while (1) {
2185 if (!(inb(IM_STAT_REG(host_index)) & IM_BUSY))
2186 break;
2187 }
2188 /* write registers and enable system interrupts */
2189 outl(imm_command, IM_CMD_REG(host_index));
2190 outb(IM_IMM_CMD | ldn, IM_ATTN_REG(host_index));
2191 #ifdef IM_DEBUG_PROBE
2192 printk("IBM MCA SCSI: Abort queued to adapter...\n");
2193 #endif
2194 spin_unlock_irq(shpnt->host_lock);
2195 while (!cmd->SCp.Status)
2196 yield();
2197 spin_lock_irq(shpnt->host_lock);
2198 cmd->scsi_done = saved_done;
2199 #ifdef IM_DEBUG_PROBE
2200 printk("IBM MCA SCSI: Abort returned with adapter response...\n");
2201 #endif
2202
2203 /*if abort went well, call saved done, then return success or error */
2204 if (cmd->result == (DID_ABORT << 16))
2205 {
2206 cmd->result |= DID_ABORT << 16;
2207 if (cmd->scsi_done)
2208 (cmd->scsi_done) (cmd);
2209 ld(host_index)[ldn].cmd = NULL;
2210 #ifdef IM_DEBUG_PROBE
2211 printk("IBM MCA SCSI: Abort finished with success.\n");
2212 #endif
2213 return SUCCESS;
2214 } else {
2215 cmd->result |= DID_NO_CONNECT << 16;
2216 if (cmd->scsi_done)
2217 (cmd->scsi_done) (cmd);
2218 ld(host_index)[ldn].cmd = NULL;
2219 #ifdef IM_DEBUG_PROBE
2220 printk("IBM MCA SCSI: Abort failed.\n");
2221 #endif
2222 return FAILED;
2223 }
2224 }
2225
2226 static int ibmmca_abort(Scsi_Cmnd * cmd)
2227 {
2228 struct Scsi_Host *shpnt = cmd->device->host;
2229 int rc;
2230
2231 spin_lock_irq(shpnt->host_lock);
2232 rc = __ibmmca_abort(cmd);
2233 spin_unlock_irq(shpnt->host_lock);
2234
2235 return rc;
2236 }
2237
2238 static int __ibmmca_host_reset(Scsi_Cmnd * cmd)
2239 {
2240 struct Scsi_Host *shpnt;
2241 Scsi_Cmnd *cmd_aid;
2242 int ticks, i;
2243 int host_index;
2244 unsigned long imm_command;
2245
2246 if (cmd == NULL)
2247 BUG();
2248
2249 ticks = IM_RESET_DELAY * HZ;
2250 shpnt = cmd->device->host;
2251 /* search for the right hostadapter */
2252 for (host_index = 0; hosts[host_index] && hosts[host_index]->host_no != shpnt->host_no; host_index++);
2253
2254 if (!hosts[host_index]) /* invalid hostadapter descriptor address */
2255 return FAILED;
2256
2257 if (local_checking_phase_flag(host_index)) {
2258 printk(KERN_WARNING "IBM MCA SCSI: unable to reset while checking devices.\n");
2259 return FAILED;
2260 }
2261
2262 /* issue reset immediate command to subsystem, and wait for interrupt */
2263 printk("IBM MCA SCSI: resetting all devices.\n");
2264 reset_status(host_index) = IM_RESET_IN_PROGRESS;
2265 last_scsi_command(host_index)[0xf] = IM_RESET_IMM_CMD;
2266 last_scsi_type(host_index)[0xf] = IM_IMM_CMD;
2267 imm_command = inl(IM_CMD_REG(host_index));
2268 imm_command &= (unsigned long) (0xffff0000); /* mask reserved stuff */
2269 imm_command |= (unsigned long) (IM_RESET_IMM_CMD);
2270 /* must wait for attention reg not busy */
2271 while (1) {
2272 if (!(inb(IM_STAT_REG(host_index)) & IM_BUSY))
2273 break;
2274 spin_unlock_irq(shpnt->host_lock);
2275 yield();
2276 spin_lock_irq(shpnt->host_lock);
2277 }
2278 /*write registers and enable system interrupts */
2279 outl(imm_command, IM_CMD_REG(host_index));
2280 outb(IM_IMM_CMD | 0xf, IM_ATTN_REG(host_index));
2281 /* wait for interrupt finished or intr_stat register to be set, as the
2282 * interrupt will not be executed, while we are in here! */
2283
2284 /* FIXME: This is really really icky we so want a sleeping version of this ! */
2285 while (reset_status(host_index) == IM_RESET_IN_PROGRESS && --ticks && ((inb(IM_INTR_REG(host_index)) & 0x8f) != 0x8f)) {
2286 udelay((1 + 999 / HZ) * 1000);
2287 barrier();
2288 }
2289 /* if reset did not complete, just return an error */
2290 if (!ticks) {
2291 printk(KERN_ERR "IBM MCA SCSI: reset did not complete within %d seconds.\n", IM_RESET_DELAY);
2292 reset_status(host_index) = IM_RESET_FINISHED_FAIL;
2293 return FAILED;
2294 }
2295
2296 if ((inb(IM_INTR_REG(host_index)) & 0x8f) == 0x8f) {
2297 /* analysis done by this routine and not by the intr-routine */
2298 if (inb(IM_INTR_REG(host_index)) == 0xaf)
2299 reset_status(host_index) = IM_RESET_FINISHED_OK_NO_INT;
2300 else if (inb(IM_INTR_REG(host_index)) == 0xcf)
2301 reset_status(host_index) = IM_RESET_FINISHED_FAIL;
2302 else /* failed, 4get it */
2303 reset_status(host_index) = IM_RESET_NOT_IN_PROGRESS_NO_INT;
2304 outb(IM_EOI | 0xf, IM_ATTN_REG(host_index));
2305 }
2306
2307 /* if reset failed, just return an error */
2308 if (reset_status(host_index) == IM_RESET_FINISHED_FAIL) {
2309 printk(KERN_ERR "IBM MCA SCSI: reset failed.\n");
2310 return FAILED;
2311 }
2312
2313 /* so reset finished ok - call outstanding done's, and return success */
2314 printk(KERN_INFO "IBM MCA SCSI: Reset successfully completed.\n");
2315 for (i = 0; i < MAX_LOG_DEV; i++) {
2316 cmd_aid = ld(host_index)[i].cmd;
2317 if (cmd_aid && cmd_aid->scsi_done) {
2318 ld(host_index)[i].cmd = NULL;
2319 cmd_aid->result = DID_RESET << 16;
2320 }
2321 }
2322 return SUCCESS;
2323 }
2324
2325 static int ibmmca_host_reset(Scsi_Cmnd * cmd)
2326 {
2327 struct Scsi_Host *shpnt = cmd->device->host;
2328 int rc;
2329
2330 spin_lock_irq(shpnt->host_lock);
2331 rc = __ibmmca_host_reset(cmd);
2332 spin_unlock_irq(shpnt->host_lock);
2333
2334 return rc;
2335 }
2336
2337 static int ibmmca_biosparam(struct scsi_device *sdev, struct block_device *bdev, sector_t capacity, int *info)
2338 {
2339 int size = capacity;
2340 info[0] = 64;
2341 info[1] = 32;
2342 info[2] = size / (info[0] * info[1]);
2343 if (info[2] >= 1024) {
2344 info[0] = 128;
2345 info[1] = 63;
2346 info[2] = size / (info[0] * info[1]);
2347 if (info[2] >= 1024) {
2348 info[0] = 255;
2349 info[1] = 63;
2350 info[2] = size / (info[0] * info[1]);
2351 if (info[2] >= 1024)
2352 info[2] = 1023;
2353 }
2354 }
2355 return 0;
2356 }
2357
2358 /* calculate percentage of total accesses on a ldn */
2359 static int ldn_access_load(int host_index, int ldn)
2360 {
2361 if (IBM_DS(host_index).total_accesses == 0)
2362 return (0);
2363 if (IBM_DS(host_index).ldn_access[ldn] == 0)
2364 return (0);
2365 return (IBM_DS(host_index).ldn_access[ldn] * 100) / IBM_DS(host_index).total_accesses;
2366 }
2367
2368 /* calculate total amount of r/w-accesses */
2369 static int ldn_access_total_read_write(int host_index)
2370 {
2371 int a;
2372 int i;
2373
2374 a = 0;
2375 for (i = 0; i <= MAX_LOG_DEV; i++)
2376 a += IBM_DS(host_index).ldn_read_access[i] + IBM_DS(host_index).ldn_write_access[i];
2377 return (a);
2378 }
2379
2380 static int ldn_access_total_inquiry(int host_index)
2381 {
2382 int a;
2383 int i;
2384
2385 a = 0;
2386 for (i = 0; i <= MAX_LOG_DEV; i++)
2387 a += IBM_DS(host_index).ldn_inquiry_access[i];
2388 return (a);
2389 }
2390
2391 static int ldn_access_total_modeselect(int host_index)
2392 {
2393 int a;
2394 int i;
2395
2396 a = 0;
2397 for (i = 0; i <= MAX_LOG_DEV; i++)
2398 a += IBM_DS(host_index).ldn_modeselect_access[i];
2399 return (a);
2400 }
2401
2402 /* routine to display info in the proc-fs-structure (a deluxe feature) */
2403 static int ibmmca_proc_info(struct Scsi_Host *shpnt, char *buffer, char **start, off_t offset, int length, int inout)
2404 {
2405 int len = 0;
2406 int i, id, lun, host_index;
2407 unsigned long flags;
2408 int max_pun;
2409
2410 for (i = 0; hosts[i] && hosts[i] != shpnt; i++);
2411
2412 spin_lock_irqsave(hosts[i]->host_lock, flags); /* Check it */
2413 host_index = i;
2414 if (!shpnt) {
2415 len += sprintf(buffer + len, "\nIBM MCA SCSI: Can't find adapter");
2416 return len;
2417 }
2418 max_pun = subsystem_maxid(host_index);
2419
2420 len += sprintf(buffer + len, "\n IBM-SCSI-Subsystem-Linux-Driver, Version %s\n\n\n", IBMMCA_SCSI_DRIVER_VERSION);
2421 len += sprintf(buffer + len, " SCSI Access-Statistics:\n");
2422 len += sprintf(buffer + len, " Device Scanning Order....: %s\n", (ibm_ansi_order) ? "IBM/ANSI" : "New Industry Standard");
2423 #ifdef CONFIG_SCSI_MULTI_LUN
2424 len += sprintf(buffer + len, " Multiple LUN probing.....: Yes\n");
2425 #else
2426 len += sprintf(buffer + len, " Multiple LUN probing.....: No\n");
2427 #endif
2428 len += sprintf(buffer + len, " This Hostnumber..........: %d\n", shpnt->host_no);
2429 len += sprintf(buffer + len, " Base I/O-Port............: 0x%x\n", (unsigned int) (IM_CMD_REG(host_index)));
2430 len += sprintf(buffer + len, " (Shared) IRQ.............: %d\n", IM_IRQ);
2431 len += sprintf(buffer + len, " Total Interrupts.........: %d\n", IBM_DS(host_index).total_interrupts);
2432 len += sprintf(buffer + len, " Total SCSI Accesses......: %d\n", IBM_DS(host_index).total_accesses);
2433 len += sprintf(buffer + len, " Total short SCBs.........: %d\n", IBM_DS(host_index).scbs);
2434 len += sprintf(buffer + len, " Total long SCBs..........: %d\n", IBM_DS(host_index).long_scbs);
2435 len += sprintf(buffer + len, " Total SCSI READ/WRITE..: %d\n", ldn_access_total_read_write(host_index));
2436 len += sprintf(buffer + len, " Total SCSI Inquiries...: %d\n", ldn_access_total_inquiry(host_index));
2437 len += sprintf(buffer + len, " Total SCSI Modeselects.: %d\n", ldn_access_total_modeselect(host_index));
2438 len += sprintf(buffer + len, " Total SCSI other cmds..: %d\n", IBM_DS(host_index).total_accesses - ldn_access_total_read_write(host_index)
2439 - ldn_access_total_modeselect(host_index)
2440 - ldn_access_total_inquiry(host_index));
2441 len += sprintf(buffer + len, " Total SCSI command fails.: %d\n\n", IBM_DS(host_index).total_errors);
2442 len += sprintf(buffer + len, " Logical-Device-Number (LDN) Access-Statistics:\n");
2443 len += sprintf(buffer + len, " LDN | Accesses [%%] | READ | WRITE | ASSIGNMENTS\n");
2444 len += sprintf(buffer + len, " -----|--------------|-----------|-----------|--------------\n");
2445 for (i = 0; i <= MAX_LOG_DEV; i++)
2446 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]);
2447 len += sprintf(buffer + len, " -----------------------------------------------------------\n\n");
2448 len += sprintf(buffer + len, " Dynamical-LDN-Assignment-Statistics:\n");
2449 len += sprintf(buffer + len, " Number of physical SCSI-devices..: %d (+ Adapter)\n", IBM_DS(host_index).total_scsi_devices);
2450 len += sprintf(buffer + len, " Dynamical Assignment necessary...: %s\n", IBM_DS(host_index).dyn_flag ? "Yes" : "No ");
2451 len += sprintf(buffer + len, " Next LDN to be assigned..........: 0x%x\n", next_ldn(host_index));
2452 len += sprintf(buffer + len, " Dynamical assignments done yet...: %d\n", IBM_DS(host_index).dynamical_assignments);
2453 len += sprintf(buffer + len, "\n Current SCSI-Device-Mapping:\n");
2454 len += sprintf(buffer + len, " Physical SCSI-Device Map Logical SCSI-Device Map\n");
2455 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");
2456 for (id = 0; id < max_pun; id++) {
2457 len += sprintf(buffer + len, " %2d ", id);
2458 for (lun = 0; lun < 8; lun++)
2459 len += sprintf(buffer + len, "%2s ", ti_p(get_scsi(host_index)[id][lun]));
2460 len += sprintf(buffer + len, " %2d ", id);
2461 for (lun = 0; lun < 8; lun++)
2462 len += sprintf(buffer + len, "%2s ", ti_l(get_ldn(host_index)[id][lun]));
2463 len += sprintf(buffer + len, "\n");
2464 }
2465
2466 len += sprintf(buffer + len, "(A = IBM-Subsystem, D = Harddisk, T = Tapedrive, P = Processor, W = WORM,\n");
2467 len += sprintf(buffer + len, " R = CD-ROM, S = Scanner, M = MO-Drive, C = Medium-Changer, + = unprovided LUN,\n");
2468 len += sprintf(buffer + len, " - = nothing found, nothing assigned or unprobed LUN)\n\n");
2469
2470 *start = buffer + offset;
2471 len -= offset;
2472 if (len > length)
2473 len = length;
2474 spin_unlock_irqrestore(shpnt->host_lock, flags);
2475 return len;
2476 }
2477
2478 static int option_setup(char *str)
2479 {
2480 int ints[IM_MAX_HOSTS];
2481 char *cur = str;
2482 int i = 1;
2483
2484 while (cur && isdigit(*cur) && i <= IM_MAX_HOSTS) {
2485 ints[i++] = simple_strtoul(cur, NULL, 0);
2486 if ((cur = strchr(cur, ',')) != NULL)
2487 cur++;
2488 }
2489 ints[0] = i - 1;
2490 internal_ibmmca_scsi_setup(cur, ints);
2491 return 0;
2492 }
2493
2494 __setup("ibmmcascsi=", option_setup);
2495
2496 static struct scsi_host_template driver_template = {
2497 .proc_name = "ibmmca",
2498 .proc_info = ibmmca_proc_info,
2499 .name = "IBM SCSI-Subsystem",
2500 .detect = ibmmca_detect,
2501 .release = ibmmca_release,
2502 .queuecommand = ibmmca_queuecommand,
2503 .eh_abort_handler = ibmmca_abort,
2504 .eh_host_reset_handler = ibmmca_host_reset,
2505 .bios_param = ibmmca_biosparam,
2506 .can_queue = 16,
2507 .this_id = 7,
2508 .sg_tablesize = 16,
2509 .cmd_per_lun = 1,
2510 .use_clustering = ENABLE_CLUSTERING,
2511 };
2512 #include "scsi_module.c"
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