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[PATCH] merge some from Rusty's trivial patches
[linux-2.6/kvm.git] / drivers / scsi / ibmmca.c
blob6e54c7d9b33c9d1788a26150cf4d2ff2d395b9fc
1 /*
2 Low Level Linux Driver for the IBM Microchannel SCSI Subsystem for
3 Linux Kernel >= 2.4.0.
4 Copyright (c) 1995 Strom Systems, Inc. under the terms of the GNU
5 General Public License. Written by Martin Kolinek, December 1995.
6 Further development by: Chris Beauregard, Klaus Kudielka, Michael Lang
7 See the file Documentation/scsi/ibmmca.txt for a detailed description
8 of this driver, the commandline arguments and the history of its
9 development.
10 See the WWW-page: http://www.uni-mainz.de/~langm000/linux.html for latest
11 updates, info and ADF-files for adapters supported by this driver.
12
13 Alan Cox <alan@redhat.com>
14 Updated for Linux 2.5.45 to use the new error handler, cleaned up the
15 lock macros and did a few unavoidable locking tweaks, plus one locking
16 fix in the irq and completion path.
17
18 */
19
20 #include <linux/config.h>
21 #ifndef LINUX_VERSION_CODE
22 #include <linux/version.h>
23 #endif
24 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,45)
25 #error "This driver works only with kernel 2.5.45 or higher!"
26 #endif
27 #include <linux/module.h>
28 #include <linux/kernel.h>
29 #include <linux/types.h>
30 #include <linux/ctype.h>
31 #include <linux/string.h>
32 #include <linux/interrupt.h>
33 #include <linux/ioport.h>
34 #include <linux/delay.h>
35 #include <linux/blkdev.h>
36 #include <linux/proc_fs.h>
37 #include <linux/stat.h>
38 #include <linux/mca.h>
39 #include <linux/spinlock.h>
40 #include <linux/init.h>
41 #include <linux/mca-legacy.h>
42
43 #include <asm/system.h>
44 #include <asm/io.h>
45
46 #include "scsi.h"
47 #include <scsi/scsi_host.h>
48 #include "ibmmca.h"
49
50 /* current version of this driver-source: */
51 #define IBMMCA_SCSI_DRIVER_VERSION "4.0b-ac"
52
53 /* driver configuration */
54 #define IM_MAX_HOSTS 8 /* maximum number of host adapters */
55 #define IM_RESET_DELAY 60 /* seconds allowed for a reset */
56
57 /* driver debugging - #undef all for normal operation */
58 /* if defined: count interrupts and ignore this special one: */
59 #undef IM_DEBUG_TIMEOUT //50
60 #define TIMEOUT_PUN 0
61 #define TIMEOUT_LUN 0
62 /* verbose interrupt: */
63 #undef IM_DEBUG_INT
64 /* verbose queuecommand: */
65 #undef IM_DEBUG_CMD
66 /* verbose queucommand for specific SCSI-device type: */
67 #undef IM_DEBUG_CMD_SPEC_DEV
68 /* verbose device probing */
69 #undef IM_DEBUG_PROBE
70
71 /* device type that shall be displayed on syslog (only during debugging): */
72 #define IM_DEBUG_CMD_DEVICE TYPE_TAPE
73
74 /* relative addresses of hardware registers on a subsystem */
75 #define IM_CMD_REG(hi) (hosts[(hi)]->io_port) /*Command Interface, (4 bytes long) */
76 #define IM_ATTN_REG(hi) (hosts[(hi)]->io_port+4) /*Attention (1 byte) */
77 #define IM_CTR_REG(hi) (hosts[(hi)]->io_port+5) /*Basic Control (1 byte) */
78 #define IM_INTR_REG(hi) (hosts[(hi)]->io_port+6) /*Interrupt Status (1 byte, r/o) */
79 #define IM_STAT_REG(hi) (hosts[(hi)]->io_port+7) /*Basic Status (1 byte, read only) */
80
81 /* basic I/O-port of first adapter */
82 #define IM_IO_PORT 0x3540
83 /* maximum number of hosts that can be found */
84 #define IM_N_IO_PORT 8
85
86 /*requests going into the upper nibble of the Attention register */
87 /*note: the lower nibble specifies the device(0-14), or subsystem(15) */
88 #define IM_IMM_CMD 0x10 /*immediate command */
89 #define IM_SCB 0x30 /*Subsystem Control Block command */
90 #define IM_LONG_SCB 0x40 /*long Subsystem Control Block command */
91 #define IM_EOI 0xe0 /*end-of-interrupt request */
92
93 /*values for bits 7,1,0 of Basic Control reg. (bits 6-2 reserved) */
94 #define IM_HW_RESET 0x80 /*hardware reset */
95 #define IM_ENABLE_DMA 0x02 /*enable subsystem's busmaster DMA */
96 #define IM_ENABLE_INTR 0x01 /*enable interrupts to the system */
97
98 /*to interpret the upper nibble of Interrupt Status register */
99 /*note: the lower nibble specifies the device(0-14), or subsystem(15) */
100 #define IM_SCB_CMD_COMPLETED 0x10
101 #define IM_SCB_CMD_COMPLETED_WITH_RETRIES 0x50
102 #define IM_LOOP_SCATTER_BUFFER_FULL 0x60
103 #define IM_ADAPTER_HW_FAILURE 0x70
104 #define IM_IMMEDIATE_CMD_COMPLETED 0xa0
105 #define IM_CMD_COMPLETED_WITH_FAILURE 0xc0
106 #define IM_CMD_ERROR 0xe0
107 #define IM_SOFTWARE_SEQUENCING_ERROR 0xf0
108
109 /*to interpret bits 3-0 of Basic Status register (bits 7-4 reserved) */
110 #define IM_CMD_REG_FULL 0x08
111 #define IM_CMD_REG_EMPTY 0x04
112 #define IM_INTR_REQUEST 0x02
113 #define IM_BUSY 0x01
114
115 /*immediate commands (word written into low 2 bytes of command reg) */
116 #define IM_RESET_IMM_CMD 0x0400
117 #define IM_FEATURE_CTR_IMM_CMD 0x040c
118 #define IM_DMA_PACING_IMM_CMD 0x040d
119 #define IM_ASSIGN_IMM_CMD 0x040e
120 #define IM_ABORT_IMM_CMD 0x040f
121 #define IM_FORMAT_PREP_IMM_CMD 0x0417
122
123 /*SCB (Subsystem Control Block) structure */
124 struct im_scb {
125 unsigned short command; /*command word (read, etc.) */
126 unsigned short enable; /*enable word, modifies cmd */
127 union {
128 unsigned long log_blk_adr; /*block address on SCSI device */
129 unsigned char scsi_cmd_length; /*6,10,12, for other scsi cmd */
130 } u1;
131 unsigned long sys_buf_adr; /*physical system memory adr */
132 unsigned long sys_buf_length; /*size of sys mem buffer */
133 unsigned long tsb_adr; /*Termination Status Block adr */
134 unsigned long scb_chain_adr; /*optional SCB chain address */
135 union {
136 struct {
137 unsigned short count; /*block count, on SCSI device */
138 unsigned short length; /*block length, on SCSI device */
139 } blk;
140 unsigned char scsi_command[12]; /*other scsi command */
141 } u2;
142 };
143
144 /*structure scatter-gather element (for list of system memory areas) */
145 struct im_sge {
146 void *address;
147 unsigned long byte_length;
148 };
149
150 /*structure returned by a get_pos_info command: */
151 struct im_pos_info {
152 unsigned short pos_id; /* adapter id */
153 unsigned char pos_3a; /* pos 3 (if pos 6 = 0) */
154 unsigned char pos_2; /* pos 2 */
155 unsigned char int_level; /* interrupt level IRQ 11 or 14 */
156 unsigned char pos_4a; /* pos 4 (if pos 6 = 0) */
157 unsigned short connector_size; /* MCA connector size: 16 or 32 Bit */
158 unsigned char num_luns; /* number of supported luns per device */
159 unsigned char num_puns; /* number of supported puns */
160 unsigned char pacing_factor; /* pacing factor */
161 unsigned char num_ldns; /* number of ldns available */
162 unsigned char eoi_off; /* time EOI and interrupt inactive */
163 unsigned char max_busy; /* time between reset and busy on */
164 unsigned short cache_stat; /* ldn cachestat. Bit=1 = not cached */
165 unsigned short retry_stat; /* retry status of ldns. Bit=1=disabled */
166 unsigned char pos_4b; /* pos 4 (if pos 6 = 1) */
167 unsigned char pos_3b; /* pos 3 (if pos 6 = 1) */
168 unsigned char pos_6; /* pos 6 */
169 unsigned char pos_5; /* pos 5 */
170 unsigned short max_overlap; /* maximum overlapping requests */
171 unsigned short num_bus; /* number of SCSI-busses */
172 };
173
174 /*values for SCB command word */
175 #define IM_NO_SYNCHRONOUS 0x0040 /*flag for any command */
176 #define IM_NO_DISCONNECT 0x0080 /*flag for any command */
177 #define IM_READ_DATA_CMD 0x1c01
178 #define IM_WRITE_DATA_CMD 0x1c02
179 #define IM_READ_VERIFY_CMD 0x1c03
180 #define IM_WRITE_VERIFY_CMD 0x1c04
181 #define IM_REQUEST_SENSE_CMD 0x1c08
182 #define IM_READ_CAPACITY_CMD 0x1c09
183 #define IM_DEVICE_INQUIRY_CMD 0x1c0b
184 #define IM_READ_LOGICAL_CMD 0x1c2a
185 #define IM_OTHER_SCSI_CMD_CMD 0x241f
186
187 /* unused, but supported, SCB commands */
188 #define IM_GET_COMMAND_COMPLETE_STATUS_CMD 0x1c07 /* command status */
189 #define IM_GET_POS_INFO_CMD 0x1c0a /* returns neat stuff */
190 #define IM_READ_PREFETCH_CMD 0x1c31 /* caching controller only */
191 #define IM_FOMAT_UNIT_CMD 0x1c16 /* format unit */
192 #define IM_REASSIGN_BLOCK_CMD 0x1c18 /* in case of error */
193
194 /*values to set bits in the enable word of SCB */
195 #define IM_READ_CONTROL 0x8000
196 #define IM_REPORT_TSB_ONLY_ON_ERROR 0x4000
197 #define IM_RETRY_ENABLE 0x2000
198 #define IM_POINTER_TO_LIST 0x1000
199 #define IM_SUPRESS_EXCEPTION_SHORT 0x0400
200 #define IM_BYPASS_BUFFER 0x0200
201 #define IM_CHAIN_ON_NO_ERROR 0x0001
202
203 /*TSB (Termination Status Block) structure */
204 struct im_tsb {
205 unsigned short end_status;
206 unsigned short reserved1;
207 unsigned long residual_byte_count;
208 unsigned long sg_list_element_adr;
209 unsigned short status_length;
210 unsigned char dev_status;
211 unsigned char cmd_status;
212 unsigned char dev_error;
213 unsigned char cmd_error;
214 unsigned short reserved2;
215 unsigned short reserved3;
216 unsigned short low_of_last_scb_adr;
217 unsigned short high_of_last_scb_adr;
218 };
219
220 /*subsystem uses interrupt request level 14 */
221 #define IM_IRQ 14
222 /*SCSI-2 F/W may evade to interrupt 11 */
223 #define IM_IRQ_FW 11
224
225 /* Model 95 has an additional alphanumeric display, which can be used
226 to display SCSI-activities. 8595 models do not have any disk led, which
227 makes this feature quite useful.
228 The regular PS/2 disk led is turned on/off by bits 6,7 of system
229 control port. */
230
231 /* LED display-port (actually, last LED on display) */
232 #define MOD95_LED_PORT 0x108
233 /* system-control-register of PS/2s with diskindicator */
234 #define PS2_SYS_CTR 0x92
235 /* activity displaying methods */
236 #define LED_DISP 1
237 #define LED_ADISP 2
238 #define LED_ACTIVITY 4
239 /* failed intr */
240 #define CMD_FAIL 255
241
242 /* The SCSI-ID(!) of the accessed SCSI-device is shown on PS/2-95 machines' LED
243 displays. ldn is no longer displayed here, because the ldn mapping is now
244 done dynamically and the ldn <-> pun,lun maps can be looked-up at boottime
245 or during uptime in /proc/scsi/ibmmca/<host_no> in case of trouble,
246 interest, debugging or just for having fun. The left number gives the
247 host-adapter number and the right shows the accessed SCSI-ID. */
248
249 /* display_mode is set by the ibmmcascsi= command line arg */
250 static int display_mode = 0;
251 /* set default adapter timeout */
252 static unsigned int adapter_timeout = 45;
253 /* for probing on feature-command: */
254 static unsigned int global_command_error_excuse = 0;
255 /* global setting by command line for adapter_speed */
256 static int global_adapter_speed = 0; /* full speed by default */
257
258 /* Panel / LED on, do it right for F/W addressin, too. adisplay will
259 * just ignore ids>7, as the panel has only 7 digits available */
260 #define PS2_DISK_LED_ON(ad,id) { if (display_mode & LED_DISP) { if (id>9) \
261 outw((ad+48)|((id+55)<<8), MOD95_LED_PORT ); else \
262 outw((ad+48)|((id+48)<<8), MOD95_LED_PORT ); } else \
263 if (display_mode & LED_ADISP) { if (id<7) outb((char)(id+48),MOD95_LED_PORT+1+id); \
264 outb((char)(ad+48), MOD95_LED_PORT); } \
265 if ((display_mode & LED_ACTIVITY)||(!display_mode)) \
266 outb(inb(PS2_SYS_CTR) | 0xc0, PS2_SYS_CTR); }
267
268 /* Panel / LED off */
269 /* bug fixed, Dec 15, 1997, where | was replaced by & here */
270 #define PS2_DISK_LED_OFF() { if (display_mode & LED_DISP) \
271 outw(0x2020, MOD95_LED_PORT ); else if (display_mode & LED_ADISP) { \
272 outl(0x20202020,MOD95_LED_PORT); outl(0x20202020,MOD95_LED_PORT+4); } \
273 if ((display_mode & LED_ACTIVITY)||(!display_mode)) \
274 outb(inb(PS2_SYS_CTR) & 0x3f, PS2_SYS_CTR); }
275
276 /*list of supported subsystems */
277 struct subsys_list_struct {
278 unsigned short mca_id;
279 char *description;
280 };
281
282 /* types of different supported hardware that goes to hostdata special */
283 #define IBM_SCSI2_FW 0
284 #define IBM_7568_WCACHE 1
285 #define IBM_EXP_UNIT 2
286 #define IBM_SCSI_WCACHE 3
287 #define IBM_SCSI 4
288
289 /* other special flags for hostdata structure */
290 #define FORCED_DETECTION 100
291 #define INTEGRATED_SCSI 101
292
293 /* List of possible IBM-SCSI-adapters */
294 static struct subsys_list_struct subsys_list[] = {
295 {0x8efc, "IBM SCSI-2 F/W Adapter"}, /* special = 0 */
296 {0x8efd, "IBM 7568 Industrial Computer SCSI Adapter w/Cache"}, /* special = 1 */
297 {0x8ef8, "IBM Expansion Unit SCSI Controller"}, /* special = 2 */
298 {0x8eff, "IBM SCSI Adapter w/Cache"}, /* special = 3 */
299 {0x8efe, "IBM SCSI Adapter"}, /* special = 4 */
300 };
301
302 /* Max number of logical devices (can be up from 0 to 14). 15 is the address
303 of the adapter itself. */
304 #define MAX_LOG_DEV 15
305
306 /*local data for a logical device */
307 struct logical_device {
308 struct im_scb scb; /* SCSI-subsystem-control-block structure */
309 struct im_tsb tsb; /* SCSI command complete status block structure */
310 struct im_sge sge[16]; /* scatter gather list structure */
311 unsigned char buf[256]; /* SCSI command return data buffer */
312 Scsi_Cmnd *cmd; /* SCSI-command that is currently in progress */
313 int device_type; /* type of the SCSI-device. See include/scsi/scsi.h
314 for interpretation of the possible values */
315 int block_length; /* blocksize of a particular logical SCSI-device */
316 int cache_flag; /* 1 if this is uncached, 0 if cache is present for ldn */
317 int retry_flag; /* 1 if adapter retry is disabled, 0 if enabled */
318 };
319
320 /* statistics of the driver during operations (for proc_info) */
321 struct Driver_Statistics {
322 /* SCSI statistics on the adapter */
323 int ldn_access[MAX_LOG_DEV + 1]; /* total accesses on a ldn */
324 int ldn_read_access[MAX_LOG_DEV + 1]; /* total read-access on a ldn */
325 int ldn_write_access[MAX_LOG_DEV + 1]; /* total write-access on a ldn */
326 int ldn_inquiry_access[MAX_LOG_DEV + 1]; /* total inquiries on a ldn */
327 int ldn_modeselect_access[MAX_LOG_DEV + 1]; /* total mode selects on ldn */
328 int scbs; /* short SCBs queued */
329 int long_scbs; /* long SCBs queued */
330 int total_accesses; /* total accesses on all ldns */
331 int total_interrupts; /* total interrupts (should be
332 same as total_accesses) */
333 int total_errors; /* command completed with error */
334 /* dynamical assignment statistics */
335 int total_scsi_devices; /* number of physical pun,lun */
336 int dyn_flag; /* flag showing dynamical mode */
337 int dynamical_assignments; /* number of remappings of ldns */
338 int ldn_assignments[MAX_LOG_DEV + 1]; /* number of remappings of each
339 ldn */
340 };
341
342 /* data structure for each host adapter */
343 struct ibmmca_hostdata {
344 /* array of logical devices: */
345 struct logical_device _ld[MAX_LOG_DEV + 1];
346 /* array to convert (pun, lun) into logical device number: */
347 unsigned char _get_ldn[16][8];
348 /*array that contains the information about the physical SCSI-devices
349 attached to this host adapter: */
350 unsigned char _get_scsi[16][8];
351 /* used only when checking logical devices: */
352 int _local_checking_phase_flag;
353 /* report received interrupt: */
354 int _got_interrupt;
355 /* report termination-status of SCSI-command: */
356 int _stat_result;
357 /* reset status (used only when doing reset): */
358 int _reset_status;
359 /* code of the last SCSI command (needed for panic info): */
360 int _last_scsi_command[MAX_LOG_DEV + 1];
361 /* identifier of the last SCSI-command type */
362 int _last_scsi_type[MAX_LOG_DEV + 1];
363 /* last blockcount */
364 int _last_scsi_blockcount[MAX_LOG_DEV + 1];
365 /* last locgical block address */
366 unsigned long _last_scsi_logical_block[MAX_LOG_DEV + 1];
367 /* Counter that points on the next reassignable ldn for dynamical
368 remapping. The default value is 7, that is the first reassignable
369 number in the list at boottime: */
370 int _next_ldn;
371 /* Statistics-structure for this IBM-SCSI-host: */
372 struct Driver_Statistics _IBM_DS;
373 /* This hostadapters pos-registers pos2 until pos6 */
374 unsigned int _pos[8];
375 /* assign a special variable, that contains dedicated info about the
376 adaptertype */
377 int _special;
378 /* connector size on the MCA bus */
379 int _connector_size;
380 /* synchronous SCSI transfer rate bitpattern */
381 int _adapter_speed;
382 };
383
384 /* macros to access host data structure */
385 #define subsystem_pun(hi) (hosts[(hi)]->this_id)
386 #define subsystem_maxid(hi) (hosts[(hi)]->max_id)
387 #define ld(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_ld)
388 #define get_ldn(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_get_ldn)
389 #define get_scsi(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_get_scsi)
390 #define local_checking_phase_flag(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_local_checking_phase_flag)
391 #define got_interrupt(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_got_interrupt)
392 #define stat_result(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_stat_result)
393 #define reset_status(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_reset_status)
394 #define last_scsi_command(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_command)
395 #define last_scsi_type(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_type)
396 #define last_scsi_blockcount(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_blockcount)
397 #define last_scsi_logical_block(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_logical_block)
398 #define last_scsi_type(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_type)
399 #define next_ldn(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_next_ldn)
400 #define IBM_DS(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_IBM_DS)
401 #define special(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_special)
402 #define subsystem_connector_size(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_connector_size)
403 #define adapter_speed(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_adapter_speed)
404 #define pos2(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_pos[2])
405 #define pos3(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_pos[3])
406 #define pos4(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_pos[4])
407 #define pos5(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_pos[5])
408 #define pos6(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_pos[6])
409
410 /* Define a arbitrary number as subsystem-marker-type. This number is, as
411 described in the ANSI-SCSI-standard, not occupied by other device-types. */
412 #define TYPE_IBM_SCSI_ADAPTER 0x2F
413
414 /* Define 0xFF for no device type, because this type is not defined within
415 the ANSI-SCSI-standard, therefore, it can be used and should not cause any
416 harm. */
417 #define TYPE_NO_DEVICE 0xFF
418
419 /* define medium-changer. If this is not defined previously, e.g. Linux
420 2.0.x, define this type here. */
421 #ifndef TYPE_MEDIUM_CHANGER
422 #define TYPE_MEDIUM_CHANGER 0x08
423 #endif
424
425 /* define possible operations for the immediate_assign command */
426 #define SET_LDN 0
427 #define REMOVE_LDN 1
428
429 /* ldn which is used to probe the SCSI devices */
430 #define PROBE_LDN 0
431
432 /* reset status flag contents */
433 #define IM_RESET_NOT_IN_PROGRESS 0
434 #define IM_RESET_IN_PROGRESS 1
435 #define IM_RESET_FINISHED_OK 2
436 #define IM_RESET_FINISHED_FAIL 3
437 #define IM_RESET_NOT_IN_PROGRESS_NO_INT 4
438 #define IM_RESET_FINISHED_OK_NO_INT 5
439
440 /* define undefined SCSI-command */
441 #define NO_SCSI 0xffff
442
443 /*-----------------------------------------------------------------------*/
444
445 /* if this is nonzero, ibmmcascsi option has been passed to the kernel */
446 static int io_port[IM_MAX_HOSTS] = { 0, 0, 0, 0, 0, 0, 0, 0 };
447 static int scsi_id[IM_MAX_HOSTS] = { 7, 7, 7, 7, 7, 7, 7, 7 };
448
449 /* fill module-parameters only, when this define is present.
450 (that is kernel version 2.1.x) */
451 #if defined(MODULE)
452 static char *boot_options = NULL;
453 module_param(boot_options, charp, 0);
454 module_param_array(io_port, int, NULL, 0);
455 module_param_array(scsi_id, int, NULL, 0);
456
457 #if 0 /* FIXME: No longer exist? --RR */
458 MODULE_PARM(display, "1i");
459 MODULE_PARM(adisplay, "1i");
460 MODULE_PARM(normal, "1i");
461 MODULE_PARM(ansi, "1i");
462 #endif
463 #endif
464 /*counter of concurrent disk read/writes, to turn on/off disk led */
465 static int disk_rw_in_progress = 0;
466
467 /* host information */
468 static int found = 0;
469 static struct Scsi_Host *hosts[IM_MAX_HOSTS + 1] = {
470 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
471 };
472 static unsigned int pos[8]; /* whole pos register-line for diagnosis */
473 /* Taking into account the additions, made by ZP Gu.
474 * This selects now the preset value from the configfile and
475 * offers the 'normal' commandline option to be accepted */
476 #ifdef CONFIG_IBMMCA_SCSI_ORDER_STANDARD
477 static char ibm_ansi_order = 1;
478 #else
479 static char ibm_ansi_order = 0;
480 #endif
481
482 static void issue_cmd(int, unsigned long, unsigned char);
483 static void internal_done(Scsi_Cmnd * cmd);
484 static void check_devices(int, int);
485 static int immediate_assign(int, unsigned int, unsigned int, unsigned int, unsigned int);
486 static int immediate_feature(int, unsigned int, unsigned int);
487 #ifdef CONFIG_IBMMCA_SCSI_DEV_RESET
488 static int immediate_reset(int, unsigned int);
489 #endif
490 static int device_inquiry(int, int);
491 static int read_capacity(int, int);
492 static int get_pos_info(int);
493 static char *ti_p(int);
494 static char *ti_l(int);
495 static char *ibmrate(unsigned int, int);
496 static int probe_display(int);
497 static int probe_bus_mode(int);
498 static int device_exists(int, int, int *, int *);
499 static struct Scsi_Host *ibmmca_register(Scsi_Host_Template *, int, int, int, char *);
500 static int option_setup(char *);
501 /* local functions needed for proc_info */
502 static int ldn_access_load(int, int);
503 static int ldn_access_total_read_write(int);
504
505 static irqreturn_t interrupt_handler(int irq, void *dev_id,
506 struct pt_regs *regs)
507 {
508 int host_index, ihost_index;
509 unsigned int intr_reg;
510 unsigned int cmd_result;
511 unsigned int ldn;
512 Scsi_Cmnd *cmd;
513 int lastSCSI;
514 struct Scsi_Host *dev = dev_id;
515
516 spin_lock(dev->host_lock);
517 /* search for one adapter-response on shared interrupt */
518 for (host_index = 0; hosts[host_index] && !(inb(IM_STAT_REG(host_index)) & IM_INTR_REQUEST); host_index++);
519 /* return if some other device on this IRQ caused the interrupt */
520 if (!hosts[host_index]) {
521 spin_unlock(dev->host_lock);
522 return IRQ_NONE;
523 }
524
525 /* the reset-function already did all the job, even ints got
526 renabled on the subsystem, so just return */
527 if ((reset_status(host_index) == IM_RESET_NOT_IN_PROGRESS_NO_INT) || (reset_status(host_index) == IM_RESET_FINISHED_OK_NO_INT)) {
528 reset_status(host_index) = IM_RESET_NOT_IN_PROGRESS;
529 spin_unlock(dev->host_lock);
530 return IRQ_HANDLED;
531 }
532
533 /*must wait for attention reg not busy, then send EOI to subsystem */
534 while (1) {
535 if (!(inb(IM_STAT_REG(host_index)) & IM_BUSY))
536 break;
537 cpu_relax();
538 }
539 ihost_index = host_index;
540 /*get command result and logical device */
541 intr_reg = (unsigned char) (inb(IM_INTR_REG(ihost_index)));
542 cmd_result = intr_reg & 0xf0;
543 ldn = intr_reg & 0x0f;
544 /* get the last_scsi_command here */
545 lastSCSI = last_scsi_command(ihost_index)[ldn];
546 outb(IM_EOI | ldn, IM_ATTN_REG(ihost_index));
547
548 /*these should never happen (hw fails, or a local programming bug) */
549 if (!global_command_error_excuse) {
550 switch (cmd_result) {
551 /* Prevent from Ooopsing on error to show the real reason */
552 case IM_ADAPTER_HW_FAILURE:
553 case IM_SOFTWARE_SEQUENCING_ERROR:
554 case IM_CMD_ERROR:
555 printk(KERN_ERR "IBM MCA SCSI: Fatal Subsystem ERROR!\n");
556 printk(KERN_ERR " Last cmd=0x%x, ena=%x, len=", lastSCSI, ld(ihost_index)[ldn].scb.enable);
557 if (ld(ihost_index)[ldn].cmd)
558 printk("%ld/%ld,", (long) (ld(ihost_index)[ldn].cmd->request_bufflen), (long) (ld(ihost_index)[ldn].scb.sys_buf_length));
559 else
560 printk("none,");
561 if (ld(ihost_index)[ldn].cmd)
562 printk("Blocksize=%d", ld(ihost_index)[ldn].scb.u2.blk.length);
563 else
564 printk("Blocksize=none");
565 printk(", host=0x%x, ldn=0x%x\n", ihost_index, ldn);
566 if (ld(ihost_index)[ldn].cmd) {
567 printk(KERN_ERR "Blockcount=%d/%d\n", last_scsi_blockcount(ihost_index)[ldn], ld(ihost_index)[ldn].scb.u2.blk.count);
568 printk(KERN_ERR "Logical block=%lx/%lx\n", last_scsi_logical_block(ihost_index)[ldn], ld(ihost_index)[ldn].scb.u1.log_blk_adr);
569 }
570 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");
571 /* if errors appear, enter this section to give detailed info */
572 printk(KERN_ERR "IBM MCA SCSI: Subsystem Error-Status follows:\n");
573 printk(KERN_ERR " Command Type................: %x\n", last_scsi_type(ihost_index)[ldn]);
574 printk(KERN_ERR " Attention Register..........: %x\n", inb(IM_ATTN_REG(ihost_index)));
575 printk(KERN_ERR " Basic Control Register......: %x\n", inb(IM_CTR_REG(ihost_index)));
576 printk(KERN_ERR " Interrupt Status Register...: %x\n", intr_reg);
577 printk(KERN_ERR " Basic Status Register.......: %x\n", inb(IM_STAT_REG(ihost_index)));
578 if ((last_scsi_type(ihost_index)[ldn] == IM_SCB) || (last_scsi_type(ihost_index)[ldn] == IM_LONG_SCB)) {
579 printk(KERN_ERR " SCB-Command.................: %x\n", ld(ihost_index)[ldn].scb.command);
580 printk(KERN_ERR " SCB-Enable..................: %x\n", ld(ihost_index)[ldn].scb.enable);
581 printk(KERN_ERR " SCB-logical block address...: %lx\n", ld(ihost_index)[ldn].scb.u1.log_blk_adr);
582 printk(KERN_ERR " SCB-system buffer address...: %lx\n", ld(ihost_index)[ldn].scb.sys_buf_adr);
583 printk(KERN_ERR " SCB-system buffer length....: %lx\n", ld(ihost_index)[ldn].scb.sys_buf_length);
584 printk(KERN_ERR " SCB-tsb address.............: %lx\n", ld(ihost_index)[ldn].scb.tsb_adr);
585 printk(KERN_ERR " SCB-Chain address...........: %lx\n", ld(ihost_index)[ldn].scb.scb_chain_adr);
586 printk(KERN_ERR " SCB-block count.............: %x\n", ld(ihost_index)[ldn].scb.u2.blk.count);
587 printk(KERN_ERR " SCB-block length............: %x\n", ld(ihost_index)[ldn].scb.u2.blk.length);
588 }
589 printk(KERN_ERR " Send this report to the maintainer.\n");
590 panic("IBM MCA SCSI: Fatal error message from the subsystem (0x%X,0x%X)!\n", lastSCSI, cmd_result);
591 break;
592 }
593 } else {
594 /* The command error handling is made silent, but we tell the
595 * calling function, that there is a reported error from the
596 * adapter. */
597 switch (cmd_result) {
598 case IM_ADAPTER_HW_FAILURE:
599 case IM_SOFTWARE_SEQUENCING_ERROR:
600 case IM_CMD_ERROR:
601 global_command_error_excuse = CMD_FAIL;
602 break;
603 default:
604 global_command_error_excuse = 0;
605 break;
606 }
607 }
608 /* if no panic appeared, increase the interrupt-counter */
609 IBM_DS(ihost_index).total_interrupts++;
610 /*only for local checking phase */
611 if (local_checking_phase_flag(ihost_index)) {
612 stat_result(ihost_index) = cmd_result;
613 got_interrupt(ihost_index) = 1;
614 reset_status(ihost_index) = IM_RESET_FINISHED_OK;
615 last_scsi_command(ihost_index)[ldn] = NO_SCSI;
616 spin_unlock(dev->host_lock);
617 return IRQ_HANDLED;
618 }
619 /* handling of commands coming from upper level of scsi driver */
620 if (last_scsi_type(ihost_index)[ldn] == IM_IMM_CMD) {
621 /* verify ldn, and may handle rare reset immediate command */
622 if ((reset_status(ihost_index) == IM_RESET_IN_PROGRESS) && (last_scsi_command(ihost_index)[ldn] == IM_RESET_IMM_CMD)) {
623 if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE) {
624 disk_rw_in_progress = 0;
625 PS2_DISK_LED_OFF();
626 reset_status(ihost_index) = IM_RESET_FINISHED_FAIL;
627 } else {
628 /*reset disk led counter, turn off disk led */
629 disk_rw_in_progress = 0;
630 PS2_DISK_LED_OFF();
631 reset_status(ihost_index) = IM_RESET_FINISHED_OK;
632 }
633 stat_result(ihost_index) = cmd_result;
634 last_scsi_command(ihost_index)[ldn] = NO_SCSI;
635 last_scsi_type(ihost_index)[ldn] = 0;
636 spin_unlock(dev->host_lock);
637 return IRQ_HANDLED;
638 } else if (last_scsi_command(ihost_index)[ldn] == IM_ABORT_IMM_CMD) {
639 /* react on SCSI abort command */
640 #ifdef IM_DEBUG_PROBE
641 printk("IBM MCA SCSI: Interrupt from SCSI-abort.\n");
642 #endif
643 disk_rw_in_progress = 0;
644 PS2_DISK_LED_OFF();
645 cmd = ld(ihost_index)[ldn].cmd;
646 ld(ihost_index)[ldn].cmd = NULL;
647 if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE)
648 cmd->result = DID_NO_CONNECT << 16;
649 else
650 cmd->result = DID_ABORT << 16;
651 stat_result(ihost_index) = cmd_result;
652 last_scsi_command(ihost_index)[ldn] = NO_SCSI;
653 last_scsi_type(ihost_index)[ldn] = 0;
654 if (cmd->scsi_done)
655 (cmd->scsi_done) (cmd); /* should be the internal_done */
656 spin_unlock(dev->host_lock);
657 return IRQ_HANDLED;
658 } else {
659 disk_rw_in_progress = 0;
660 PS2_DISK_LED_OFF();
661 reset_status(ihost_index) = IM_RESET_FINISHED_OK;
662 stat_result(ihost_index) = cmd_result;
663 last_scsi_command(ihost_index)[ldn] = NO_SCSI;
664 spin_unlock(dev->host_lock);
665 return IRQ_HANDLED;
666 }
667 }
668 last_scsi_command(ihost_index)[ldn] = NO_SCSI;
669 last_scsi_type(ihost_index)[ldn] = 0;
670 cmd = ld(ihost_index)[ldn].cmd;
671 ld(ihost_index)[ldn].cmd = NULL;
672 #ifdef IM_DEBUG_TIMEOUT
673 if (cmd) {
674 if ((cmd->target == TIMEOUT_PUN) && (cmd->device->lun == TIMEOUT_LUN)) {
675 printk("IBM MCA SCSI: Ignoring interrupt from pun=%x, lun=%x.\n", cmd->target, cmd->device->lun);
676 return IRQ_HANDLED;
677 }
678 }
679 #endif
680 /*if no command structure, just return, else clear cmd */
681 if (!cmd)
682 {
683 spin_unlock(dev->host_lock);
684 return IRQ_HANDLED;
685 }
686
687 #ifdef IM_DEBUG_INT
688 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);
689 #endif
690 /*if this is end of media read/write, may turn off PS/2 disk led */
691 if ((ld(ihost_index)[ldn].device_type != TYPE_NO_LUN) && (ld(ihost_index)[ldn].device_type != TYPE_NO_DEVICE)) {
692 /* only access this, if there was a valid device addressed */
693 if (--disk_rw_in_progress == 0)
694 PS2_DISK_LED_OFF();
695 }
696
697 /* IBM describes the status-mask to be 0x1e, but this is not conform
698 * with SCSI-definition, I suppose, the reason for it is that IBM
699 * adapters do not support CMD_TERMINATED, TASK_SET_FULL and
700 * ACA_ACTIVE as returning statusbyte information. (ML) */
701 if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE) {
702 cmd->result = (unsigned char) (ld(ihost_index)[ldn].tsb.dev_status & 0x1e);
703 IBM_DS(ihost_index).total_errors++;
704 } else
705 cmd->result = 0;
706 /* write device status into cmd->result, and call done function */
707 if (lastSCSI == NO_SCSI) { /* unexpected interrupt :-( */
708 cmd->result |= DID_BAD_INTR << 16;
709 printk("IBM MCA SCSI: WARNING - Interrupt from non-pending SCSI-command!\n");
710 } else /* things went right :-) */
711 cmd->result |= DID_OK << 16;
712 if (cmd->scsi_done)
713 (cmd->scsi_done) (cmd);
714 spin_unlock(dev->host_lock);
715 return IRQ_HANDLED;
716 }
717
718 static void issue_cmd(int host_index, unsigned long cmd_reg, unsigned char attn_reg)
719 {
720 unsigned long flags;
721 /* must wait for attention reg not busy */
722 while (1) {
723 spin_lock_irqsave(hosts[host_index]->host_lock, flags);
724 if (!(inb(IM_STAT_REG(host_index)) & IM_BUSY))
725 break;
726 spin_unlock_irqrestore(hosts[host_index]->host_lock, flags);
727 }
728 /* write registers and enable system interrupts */
729 outl(cmd_reg, IM_CMD_REG(host_index));
730 outb(attn_reg, IM_ATTN_REG(host_index));
731 spin_unlock_irqrestore(hosts[host_index]->host_lock, flags);
732 }
733
734 static void internal_done(Scsi_Cmnd * cmd)
735 {
736 cmd->SCp.Status++;
737 return;
738 }
739
740 /* SCSI-SCB-command for device_inquiry */
741 static int device_inquiry(int host_index, int ldn)
742 {
743 int retr;
744 struct im_scb *scb;
745 struct im_tsb *tsb;
746 unsigned char *buf;
747
748 scb = &(ld(host_index)[ldn].scb);
749 tsb = &(ld(host_index)[ldn].tsb);
750 buf = (unsigned char *) (&(ld(host_index)[ldn].buf));
751 ld(host_index)[ldn].tsb.dev_status = 0; /* prepare statusblock */
752 for (retr = 0; retr < 3; retr++) {
753 /* fill scb with inquiry command */
754 scb->command = IM_DEVICE_INQUIRY_CMD | IM_NO_DISCONNECT;
755 scb->enable = IM_REPORT_TSB_ONLY_ON_ERROR | IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_RETRY_ENABLE | IM_BYPASS_BUFFER;
756 last_scsi_command(host_index)[ldn] = IM_DEVICE_INQUIRY_CMD;
757 last_scsi_type(host_index)[ldn] = IM_SCB;
758 scb->sys_buf_adr = isa_virt_to_bus(buf);
759 scb->sys_buf_length = 255; /* maximum bufferlength gives max info */
760 scb->tsb_adr = isa_virt_to_bus(tsb);
761 /* issue scb to passed ldn, and busy wait for interrupt */
762 got_interrupt(host_index) = 0;
763 issue_cmd(host_index, isa_virt_to_bus(scb), IM_SCB | ldn);
764 while (!got_interrupt(host_index))
765 barrier();
766
767 /*if command succesful, break */
768 if ((stat_result(host_index) == IM_SCB_CMD_COMPLETED) || (stat_result(host_index) == IM_SCB_CMD_COMPLETED_WITH_RETRIES))
769 return 1;
770 }
771 /*if all three retries failed, return "no device at this ldn" */
772 if (retr >= 3)
773 return 0;
774 else
775 return 1;
776 }
777
778 static int read_capacity(int host_index, int ldn)
779 {
780 int retr;
781 struct im_scb *scb;
782 struct im_tsb *tsb;
783 unsigned char *buf;
784
785 scb = &(ld(host_index)[ldn].scb);
786 tsb = &(ld(host_index)[ldn].tsb);
787 buf = (unsigned char *) (&(ld(host_index)[ldn].buf));
788 ld(host_index)[ldn].tsb.dev_status = 0;
789 for (retr = 0; retr < 3; retr++) {
790 /*fill scb with read capacity command */
791 scb->command = IM_READ_CAPACITY_CMD;
792 scb->enable = IM_REPORT_TSB_ONLY_ON_ERROR | IM_READ_CONTROL | IM_RETRY_ENABLE | IM_BYPASS_BUFFER;
793 last_scsi_command(host_index)[ldn] = IM_READ_CAPACITY_CMD;
794 last_scsi_type(host_index)[ldn] = IM_SCB;
795 scb->sys_buf_adr = isa_virt_to_bus(buf);
796 scb->sys_buf_length = 8;
797 scb->tsb_adr = isa_virt_to_bus(tsb);
798 /*issue scb to passed ldn, and busy wait for interrupt */
799 got_interrupt(host_index) = 0;
800 issue_cmd(host_index, isa_virt_to_bus(scb), IM_SCB | ldn);
801 while (!got_interrupt(host_index))
802 barrier();
803
804 /*if got capacity, get block length and return one device found */
805 if ((stat_result(host_index) == IM_SCB_CMD_COMPLETED) || (stat_result(host_index) == IM_SCB_CMD_COMPLETED_WITH_RETRIES))
806 return 1;
807 }
808 /*if all three retries failed, return "no device at this ldn" */
809 if (retr >= 3)
810 return 0;
811 else
812 return 1;
813 }
814
815 static int get_pos_info(int host_index)
816 {
817 int retr;
818 struct im_scb *scb;
819 struct im_tsb *tsb;
820 unsigned char *buf;
821
822 scb = &(ld(host_index)[MAX_LOG_DEV].scb);
823 tsb = &(ld(host_index)[MAX_LOG_DEV].tsb);
824 buf = (unsigned char *) (&(ld(host_index)[MAX_LOG_DEV].buf));
825 ld(host_index)[MAX_LOG_DEV].tsb.dev_status = 0;
826 for (retr = 0; retr < 3; retr++) {
827 /*fill scb with get_pos_info command */
828 scb->command = IM_GET_POS_INFO_CMD;
829 scb->enable = IM_READ_CONTROL | IM_REPORT_TSB_ONLY_ON_ERROR | IM_RETRY_ENABLE | IM_BYPASS_BUFFER;
830 last_scsi_command(host_index)[MAX_LOG_DEV] = IM_GET_POS_INFO_CMD;
831 last_scsi_type(host_index)[MAX_LOG_DEV] = IM_SCB;
832 scb->sys_buf_adr = isa_virt_to_bus(buf);
833 if (special(host_index) == IBM_SCSI2_FW)
834 scb->sys_buf_length = 256; /* get all info from F/W adapter */
835 else
836 scb->sys_buf_length = 18; /* get exactly 18 bytes for other SCSI */
837 scb->tsb_adr = isa_virt_to_bus(tsb);
838 /*issue scb to ldn=15, and busy wait for interrupt */
839 got_interrupt(host_index) = 0;
840 issue_cmd(host_index, isa_virt_to_bus(scb), IM_SCB | MAX_LOG_DEV);
841
842 /* FIXME: timeout */
843 while (!got_interrupt(host_index))
844 barrier();
845
846 /*if got POS-stuff, get block length and return one device found */
847 if ((stat_result(host_index) == IM_SCB_CMD_COMPLETED) || (stat_result(host_index) == IM_SCB_CMD_COMPLETED_WITH_RETRIES))
848 return 1;
849 }
850 /* if all three retries failed, return "no device at this ldn" */
851 if (retr >= 3)
852 return 0;
853 else
854 return 1;
855 }
856
857 /* SCSI-immediate-command for assign. This functions maps/unmaps specific
858 ldn-numbers on SCSI (PUN,LUN). It is needed for presetting of the
859 subsystem and for dynamical remapping od ldns. */
860 static int immediate_assign(int host_index, unsigned int pun, unsigned int lun, unsigned int ldn, unsigned int operation)
861 {
862 int retr;
863 unsigned long imm_cmd;
864
865 for (retr = 0; retr < 3; retr++) {
866 /* select mutation level of the SCSI-adapter */
867 switch (special(host_index)) {
868 case IBM_SCSI2_FW:
869 imm_cmd = (unsigned long) (IM_ASSIGN_IMM_CMD);
870 imm_cmd |= (unsigned long) ((lun & 7) << 24);
871 imm_cmd |= (unsigned long) ((operation & 1) << 23);
872 imm_cmd |= (unsigned long) ((pun & 7) << 20) | ((pun & 8) << 24);
873 imm_cmd |= (unsigned long) ((ldn & 15) << 16);
874 break;
875 default:
876 imm_cmd = inl(IM_CMD_REG(host_index));
877 imm_cmd &= (unsigned long) (0xF8000000); /* keep reserved bits */
878 imm_cmd |= (unsigned long) (IM_ASSIGN_IMM_CMD);
879 imm_cmd |= (unsigned long) ((lun & 7) << 24);
880 imm_cmd |= (unsigned long) ((operation & 1) << 23);
881 imm_cmd |= (unsigned long) ((pun & 7) << 20);
882 imm_cmd |= (unsigned long) ((ldn & 15) << 16);
883 break;
884 }
885 last_scsi_command(host_index)[MAX_LOG_DEV] = IM_ASSIGN_IMM_CMD;
886 last_scsi_type(host_index)[MAX_LOG_DEV] = IM_IMM_CMD;
887 got_interrupt(host_index) = 0;
888 issue_cmd(host_index, (unsigned long) (imm_cmd), IM_IMM_CMD | MAX_LOG_DEV);
889 while (!got_interrupt(host_index))
890 barrier();
891
892 /*if command succesful, break */
893 if (stat_result(host_index) == IM_IMMEDIATE_CMD_COMPLETED)
894 return 1;
895 }
896 if (retr >= 3)
897 return 0;
898 else
899 return 1;
900 }
901
902 static int immediate_feature(int host_index, unsigned int speed, unsigned int timeout)
903 {
904 int retr;
905 unsigned long imm_cmd;
906
907 for (retr = 0; retr < 3; retr++) {
908 /* select mutation level of the SCSI-adapter */
909 imm_cmd = IM_FEATURE_CTR_IMM_CMD;
910 imm_cmd |= (unsigned long) ((speed & 0x7) << 29);
911 imm_cmd |= (unsigned long) ((timeout & 0x1fff) << 16);
912 last_scsi_command(host_index)[MAX_LOG_DEV] = IM_FEATURE_CTR_IMM_CMD;
913 last_scsi_type(host_index)[MAX_LOG_DEV] = IM_IMM_CMD;
914 got_interrupt(host_index) = 0;
915 /* we need to run into command errors in order to probe for the
916 * right speed! */
917 global_command_error_excuse = 1;
918 issue_cmd(host_index, (unsigned long) (imm_cmd), IM_IMM_CMD | MAX_LOG_DEV);
919
920 /* FIXME: timeout */
921 while (!got_interrupt(host_index))
922 barrier();
923 if (global_command_error_excuse == CMD_FAIL) {
924 global_command_error_excuse = 0;
925 return 2;
926 } else
927 global_command_error_excuse = 0;
928 /*if command succesful, break */
929 if (stat_result(host_index) == IM_IMMEDIATE_CMD_COMPLETED)
930 return 1;
931 }
932 if (retr >= 3)
933 return 0;
934 else
935 return 1;
936 }
937
938 #ifdef CONFIG_IBMMCA_SCSI_DEV_RESET
939 static int immediate_reset(int host_index, unsigned int ldn)
940 {
941 int retries;
942 int ticks;
943 unsigned long imm_command;
944
945 for (retries = 0; retries < 3; retries++) {
946 imm_command = inl(IM_CMD_REG(host_index));
947 imm_command &= (unsigned long) (0xFFFF0000); /* keep reserved bits */
948 imm_command |= (unsigned long) (IM_RESET_IMM_CMD);
949 last_scsi_command(host_index)[ldn] = IM_RESET_IMM_CMD;
950 last_scsi_type(host_index)[ldn] = IM_IMM_CMD;
951 got_interrupt(host_index) = 0;
952 reset_status(host_index) = IM_RESET_IN_PROGRESS;
953 issue_cmd(host_index, (unsigned long) (imm_command), IM_IMM_CMD | ldn);
954 ticks = IM_RESET_DELAY * HZ;
955 while (reset_status(host_index) == IM_RESET_IN_PROGRESS && --ticks) {
956 udelay((1 + 999 / HZ) * 1000);
957 barrier();
958 }
959 /* if reset did not complete, just complain */
960 if (!ticks) {
961 printk(KERN_ERR "IBM MCA SCSI: reset did not complete within %d seconds.\n", IM_RESET_DELAY);
962 reset_status(host_index) = IM_RESET_FINISHED_OK;
963 /* did not work, finish */
964 return 1;
965 }
966 /*if command succesful, break */
967 if (stat_result(host_index) == IM_IMMEDIATE_CMD_COMPLETED)
968 return 1;
969 }
970 if (retries >= 3)
971 return 0;
972 else
973 return 1;
974 }
975 #endif
976
977 /* type-interpreter for physical device numbers */
978 static char *ti_p(int dev)
979 {
980 switch (dev) {
981 case TYPE_IBM_SCSI_ADAPTER:
982 return ("A");
983 case TYPE_DISK:
984 return ("D");
985 case TYPE_TAPE:
986 return ("T");
987 case TYPE_PROCESSOR:
988 return ("P");
989 case TYPE_WORM:
990 return ("W");
991 case TYPE_ROM:
992 return ("R");
993 case TYPE_SCANNER:
994 return ("S");
995 case TYPE_MOD:
996 return ("M");
997 case TYPE_MEDIUM_CHANGER:
998 return ("C");
999 case TYPE_NO_LUN:
1000 return ("+"); /* show NO_LUN */
1001 }
1002 return ("-"); /* TYPE_NO_DEVICE and others */
1003 }
1004
1005 /* interpreter for logical device numbers (ldn) */
1006 static char *ti_l(int val)
1007 {
1008 const char hex[16] = "0123456789abcdef";
1009 static char answer[2];
1010
1011 answer[1] = (char) (0x0);
1012 if (val <= MAX_LOG_DEV)
1013 answer[0] = hex[val];
1014 else
1015 answer[0] = '-';
1016 return (char *) &answer;
1017 }
1018
1019 /* transfers bitpattern of the feature command to values in MHz */
1020 static char *ibmrate(unsigned int speed, int i)
1021 {
1022 switch (speed) {
1023 case 0:
1024 return i ? "5.00" : "10.00";
1025 case 1:
1026 return i ? "4.00" : "8.00";
1027 case 2:
1028 return i ? "3.33" : "6.66";
1029 case 3:
1030 return i ? "2.86" : "5.00";
1031 case 4:
1032 return i ? "2.50" : "4.00";
1033 case 5:
1034 return i ? "2.22" : "3.10";
1035 case 6:
1036 return i ? "2.00" : "2.50";
1037 case 7:
1038 return i ? "1.82" : "2.00";
1039 }
1040 return "---";
1041 }
1042
1043 static int probe_display(int what)
1044 {
1045 static int rotator = 0;
1046 const char rotor[] = "|/-\\";
1047
1048 if (!(display_mode & LED_DISP))
1049 return 0;
1050 if (!what) {
1051 outl(0x20202020, MOD95_LED_PORT);
1052 outl(0x20202020, MOD95_LED_PORT + 4);
1053 } else {
1054 outb('S', MOD95_LED_PORT + 7);
1055 outb('C', MOD95_LED_PORT + 6);
1056 outb('S', MOD95_LED_PORT + 5);
1057 outb('I', MOD95_LED_PORT + 4);
1058 outb('i', MOD95_LED_PORT + 3);
1059 outb('n', MOD95_LED_PORT + 2);
1060 outb('i', MOD95_LED_PORT + 1);
1061 outb((char) (rotor[rotator]), MOD95_LED_PORT);
1062 rotator++;
1063 if (rotator > 3)
1064 rotator = 0;
1065 }
1066 return 0;
1067 }
1068
1069 static int probe_bus_mode(int host_index)
1070 {
1071 struct im_pos_info *info;
1072 int num_bus = 0;
1073 int ldn;
1074
1075 info = (struct im_pos_info *) (&(ld(host_index)[MAX_LOG_DEV].buf));
1076 if (get_pos_info(host_index)) {
1077 if (info->connector_size & 0xf000)
1078 subsystem_connector_size(host_index) = 16;
1079 else
1080 subsystem_connector_size(host_index) = 32;
1081 num_bus |= (info->pos_4b & 8) >> 3;
1082 for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) {
1083 if ((special(host_index) == IBM_SCSI_WCACHE) || (special(host_index) == IBM_7568_WCACHE)) {
1084 if (!((info->cache_stat >> ldn) & 1))
1085 ld(host_index)[ldn].cache_flag = 0;
1086 }
1087 if (!((info->retry_stat >> ldn) & 1))
1088 ld(host_index)[ldn].retry_flag = 0;
1089 }
1090 #ifdef IM_DEBUG_PROBE
1091 printk("IBM MCA SCSI: SCSI-Cache bits: ");
1092 for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) {
1093 printk("%d", ld(host_index)[ldn].cache_flag);
1094 }
1095 printk("\nIBM MCA SCSI: SCSI-Retry bits: ");
1096 for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) {
1097 printk("%d", ld(host_index)[ldn].retry_flag);
1098 }
1099 printk("\n");
1100 #endif
1101 }
1102 return num_bus;
1103 }
1104
1105 /* probing scsi devices */
1106 static void check_devices(int host_index, int adaptertype)
1107 {
1108 int id, lun, ldn, ticks;
1109 int count_devices; /* local counter for connected device */
1110 int max_pun;
1111 int num_bus;
1112 int speedrun; /* local adapter_speed check variable */
1113
1114 /* assign default values to certain variables */
1115 ticks = 0;
1116 count_devices = 0;
1117 IBM_DS(host_index).dyn_flag = 0; /* normally no need for dynamical ldn management */
1118 IBM_DS(host_index).total_errors = 0; /* set errorcounter to 0 */
1119 next_ldn(host_index) = 7; /* next ldn to be assigned is 7, because 0-6 is 'hardwired' */
1120
1121 /* initialize the very important driver-informational arrays/structs */
1122 memset(ld(host_index), 0, sizeof(ld(host_index)));
1123 for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) {
1124 last_scsi_command(host_index)[ldn] = NO_SCSI; /* emptify last SCSI-command storage */
1125 last_scsi_type(host_index)[ldn] = 0;
1126 ld(host_index)[ldn].cache_flag = 1;
1127 ld(host_index)[ldn].retry_flag = 1;
1128 }
1129 memset(get_ldn(host_index), TYPE_NO_DEVICE, sizeof(get_ldn(host_index))); /* this is essential ! */
1130 memset(get_scsi(host_index), TYPE_NO_DEVICE, sizeof(get_scsi(host_index))); /* this is essential ! */
1131 for (lun = 0; lun < 8; lun++) {
1132 /* mark the adapter at its pun on all luns */
1133 get_scsi(host_index)[subsystem_pun(host_index)][lun] = TYPE_IBM_SCSI_ADAPTER;
1134 get_ldn(host_index)[subsystem_pun(host_index)][lun] = MAX_LOG_DEV; /* make sure, the subsystem
1135 ldn is active for all
1136 luns. */
1137 }
1138 probe_display(0); /* Supercool display usage during SCSI-probing. */
1139 /* This makes sense, when booting without any */
1140 /* monitor connected on model XX95. */
1141
1142 /* STEP 1: */
1143 adapter_speed(host_index) = global_adapter_speed;
1144 speedrun = adapter_speed(host_index);
1145 while (immediate_feature(host_index, speedrun, adapter_timeout) == 2) {
1146 probe_display(1);
1147 if (speedrun == 7)
1148 panic("IBM MCA SCSI: Cannot set Synchronous-Transfer-Rate!\n");
1149 speedrun++;
1150 if (speedrun > 7)
1151 speedrun = 7;
1152 }
1153 adapter_speed(host_index) = speedrun;
1154 /* Get detailed information about the current adapter, necessary for
1155 * device operations: */
1156 num_bus = probe_bus_mode(host_index);
1157
1158 /* num_bus contains only valid data for the F/W adapter! */
1159 if (adaptertype == IBM_SCSI2_FW) { /* F/W SCSI adapter: */
1160 /* F/W adapter PUN-space extension evaluation: */
1161 if (num_bus) {
1162 printk(KERN_INFO "IBM MCA SCSI: Separate bus mode (wide-addressing enabled)\n");
1163 subsystem_maxid(host_index) = 16;
1164 } else {
1165 printk(KERN_INFO "IBM MCA SCSI: Combined bus mode (wide-addressing disabled)\n");
1166 subsystem_maxid(host_index) = 8;
1167 }
1168 printk(KERN_INFO "IBM MCA SCSI: Sync.-Rate (F/W: 20, Int.: 10, Ext.: %s) MBytes/s\n", ibmrate(speedrun, adaptertype));
1169 } else /* all other IBM SCSI adapters: */
1170 printk(KERN_INFO "IBM MCA SCSI: Synchronous-SCSI-Transfer-Rate: %s MBytes/s\n", ibmrate(speedrun, adaptertype));
1171
1172 /* assign correct PUN device space */
1173 max_pun = subsystem_maxid(host_index);
1174
1175 #ifdef IM_DEBUG_PROBE
1176 printk("IBM MCA SCSI: Current SCSI-host index: %d\n", host_index);
1177 printk("IBM MCA SCSI: Removing default logical SCSI-device mapping.");
1178 #else
1179 printk(KERN_INFO "IBM MCA SCSI: Dev. Order: %s, Mapping (takes <2min): ", (ibm_ansi_order) ? "ANSI" : "New");
1180 #endif
1181 for (ldn = 0; ldn < MAX_LOG_DEV; ldn++) {
1182 probe_display(1);
1183 #ifdef IM_DEBUG_PROBE
1184 printk(".");
1185 #endif
1186 immediate_assign(host_index, 0, 0, ldn, REMOVE_LDN); /* remove ldn (wherever) */
1187 }
1188 lun = 0; /* default lun is 0 */
1189 #ifndef IM_DEBUG_PROBE
1190 printk("cleared,");
1191 #endif
1192 /* STEP 2: */
1193 #ifdef IM_DEBUG_PROBE
1194 printk("\nIBM MCA SCSI: Scanning SCSI-devices.");
1195 #endif
1196 for (id = 0; id < max_pun; id++)
1197 #ifdef CONFIG_SCSI_MULTI_LUN
1198 for (lun = 0; lun < 8; lun++)
1199 #endif
1200 {
1201 probe_display(1);
1202 #ifdef IM_DEBUG_PROBE
1203 printk(".");
1204 #endif
1205 if (id != subsystem_pun(host_index)) {
1206 /* if pun is not the adapter: */
1207 /* set ldn=0 to pun,lun */
1208 immediate_assign(host_index, id, lun, PROBE_LDN, SET_LDN);
1209 if (device_inquiry(host_index, PROBE_LDN)) { /* probe device */
1210 get_scsi(host_index)[id][lun] = (unsigned char) (ld(host_index)[PROBE_LDN].buf[0]);
1211 /* entry, even for NO_LUN */
1212 if (ld(host_index)[PROBE_LDN].buf[0] != TYPE_NO_LUN)
1213 count_devices++; /* a existing device is found */
1214 }
1215 /* remove ldn */
1216 immediate_assign(host_index, id, lun, PROBE_LDN, REMOVE_LDN);
1217 }
1218 }
1219 #ifndef IM_DEBUG_PROBE
1220 printk("scanned,");
1221 #endif
1222 /* STEP 3: */
1223 #ifdef IM_DEBUG_PROBE
1224 printk("\nIBM MCA SCSI: Mapping SCSI-devices.");
1225 #endif
1226 ldn = 0;
1227 lun = 0;
1228 #ifdef CONFIG_SCSI_MULTI_LUN
1229 for (lun = 0; lun < 8 && ldn < MAX_LOG_DEV; lun++)
1230 #endif
1231 for (id = 0; id < max_pun && ldn < MAX_LOG_DEV; id++) {
1232 probe_display(1);
1233 #ifdef IM_DEBUG_PROBE
1234 printk(".");
1235 #endif
1236 if (id != subsystem_pun(host_index)) {
1237 if (get_scsi(host_index)[id][lun] != TYPE_NO_LUN && get_scsi(host_index)[id][lun] != TYPE_NO_DEVICE) {
1238 /* Only map if accepted type. Always enter for
1239 lun == 0 to get no gaps into ldn-mapping for ldn<7. */
1240 immediate_assign(host_index, id, lun, ldn, SET_LDN);
1241 get_ldn(host_index)[id][lun] = ldn; /* map ldn */
1242 if (device_exists(host_index, ldn, &ld(host_index)[ldn].block_length, &ld(host_index)[ldn].device_type)) {
1243 #ifdef CONFIG_IBMMCA_SCSI_DEV_RESET
1244 printk("resetting device at ldn=%x ... ", ldn);
1245 immediate_reset(host_index, ldn);
1246 #endif
1247 ldn++;
1248 } else {
1249 /* device vanished, probably because we don't know how to
1250 * handle it or because it has problems */
1251 if (lun > 0) {
1252 /* remove mapping */
1253 get_ldn(host_index)[id][lun] = TYPE_NO_DEVICE;
1254 immediate_assign(host_index, 0, 0, ldn, REMOVE_LDN);
1255 } else
1256 ldn++;
1257 }
1258 } else if (lun == 0) {
1259 /* map lun == 0, even if no device exists */
1260 immediate_assign(host_index, id, lun, ldn, SET_LDN);
1261 get_ldn(host_index)[id][lun] = ldn; /* map ldn */
1262 ldn++;
1263 }
1264 }
1265 }
1266 /* STEP 4: */
1267
1268 /* map remaining ldns to non-existing devices */
1269 for (lun = 1; lun < 8 && ldn < MAX_LOG_DEV; lun++)
1270 for (id = 0; id < max_pun && ldn < MAX_LOG_DEV; id++) {
1271 if (get_scsi(host_index)[id][lun] == TYPE_NO_LUN || get_scsi(host_index)[id][lun] == TYPE_NO_DEVICE) {
1272 probe_display(1);
1273 /* Map remaining ldns only to NON-existing pun,lun
1274 combinations to make sure an inquiry will fail.
1275 For MULTI_LUN, it is needed to avoid adapter autonome
1276 SCSI-remapping. */
1277 immediate_assign(host_index, id, lun, ldn, SET_LDN);
1278 get_ldn(host_index)[id][lun] = ldn;
1279 ldn++;
1280 }
1281 }
1282 #ifndef IM_DEBUG_PROBE
1283 printk("mapped.");
1284 #endif
1285 printk("\n");
1286 #ifdef IM_DEBUG_PROBE
1287 if (ibm_ansi_order)
1288 printk("IBM MCA SCSI: Device order: IBM/ANSI (pun=7 is first).\n");
1289 else
1290 printk("IBM MCA SCSI: Device order: New Industry Standard (pun=0 is first).\n");
1291 #endif
1292
1293 #ifdef IM_DEBUG_PROBE
1294 /* Show the physical and logical mapping during boot. */
1295 printk("IBM MCA SCSI: Determined SCSI-device-mapping:\n");
1296 printk(" Physical SCSI-Device Map Logical SCSI-Device Map\n");
1297 printk("ID\\LUN 0 1 2 3 4 5 6 7 ID\\LUN 0 1 2 3 4 5 6 7\n");
1298 for (id = 0; id < max_pun; id++) {
1299 printk("%2d ", id);
1300 for (lun = 0; lun < 8; lun++)
1301 printk("%2s ", ti_p(get_scsi(host_index)[id][lun]));
1302 printk(" %2d ", id);
1303 for (lun = 0; lun < 8; lun++)
1304 printk("%2s ", ti_l(get_ldn(host_index)[id][lun]));
1305 printk("\n");
1306 }
1307 #endif
1308
1309 /* assign total number of found SCSI-devices to the statistics struct */
1310 IBM_DS(host_index).total_scsi_devices = count_devices;
1311
1312 /* decide for output in /proc-filesystem, if the configuration of
1313 SCSI-devices makes dynamical reassignment of devices necessary */
1314 if (count_devices >= MAX_LOG_DEV)
1315 IBM_DS(host_index).dyn_flag = 1; /* dynamical assignment is necessary */
1316 else
1317 IBM_DS(host_index).dyn_flag = 0; /* dynamical assignment is not necessary */
1318
1319 /* If no SCSI-devices are assigned, return 1 in order to cause message. */
1320 if (ldn == 0)
1321 printk("IBM MCA SCSI: Warning: No SCSI-devices found/assigned!\n");
1322
1323 /* reset the counters for statistics on the current adapter */
1324 IBM_DS(host_index).scbs = 0;
1325 IBM_DS(host_index).long_scbs = 0;
1326 IBM_DS(host_index).total_accesses = 0;
1327 IBM_DS(host_index).total_interrupts = 0;
1328 IBM_DS(host_index).dynamical_assignments = 0;
1329 memset(IBM_DS(host_index).ldn_access, 0x0, sizeof(IBM_DS(host_index).ldn_access));
1330 memset(IBM_DS(host_index).ldn_read_access, 0x0, sizeof(IBM_DS(host_index).ldn_read_access));
1331 memset(IBM_DS(host_index).ldn_write_access, 0x0, sizeof(IBM_DS(host_index).ldn_write_access));
1332 memset(IBM_DS(host_index).ldn_inquiry_access, 0x0, sizeof(IBM_DS(host_index).ldn_inquiry_access));
1333 memset(IBM_DS(host_index).ldn_modeselect_access, 0x0, sizeof(IBM_DS(host_index).ldn_modeselect_access));
1334 memset(IBM_DS(host_index).ldn_assignments, 0x0, sizeof(IBM_DS(host_index).ldn_assignments));
1335 probe_display(0);
1336 return;
1337 }
1338
1339 static int device_exists(int host_index, int ldn, int *block_length, int *device_type)
1340 {
1341 unsigned char *buf;
1342 /* if no valid device found, return immediately with 0 */
1343 if (!(device_inquiry(host_index, ldn)))
1344 return 0;
1345 buf = (unsigned char *) (&(ld(host_index)[ldn].buf));
1346 if (*buf == TYPE_ROM) {
1347 *device_type = TYPE_ROM;
1348 *block_length = 2048; /* (standard blocksize for yellow-/red-book) */
1349 return 1;
1350 }
1351 if (*buf == TYPE_WORM) {
1352 *device_type = TYPE_WORM;
1353 *block_length = 2048;
1354 return 1;
1355 }
1356 if (*buf == TYPE_DISK) {
1357 *device_type = TYPE_DISK;
1358 if (read_capacity(host_index, ldn)) {
1359 *block_length = *(buf + 7) + (*(buf + 6) << 8) + (*(buf + 5) << 16) + (*(buf + 4) << 24);
1360 return 1;
1361 } else
1362 return 0;
1363 }
1364 if (*buf == TYPE_MOD) {
1365 *device_type = TYPE_MOD;
1366 if (read_capacity(host_index, ldn)) {
1367 *block_length = *(buf + 7) + (*(buf + 6) << 8) + (*(buf + 5) << 16) + (*(buf + 4) << 24);
1368 return 1;
1369 } else
1370 return 0;
1371 }
1372 if (*buf == TYPE_TAPE) {
1373 *device_type = TYPE_TAPE;
1374 *block_length = 0; /* not in use (setting by mt and mtst in op.) */
1375 return 1;
1376 }
1377 if (*buf == TYPE_PROCESSOR) {
1378 *device_type = TYPE_PROCESSOR;
1379 *block_length = 0; /* they set their stuff on drivers */
1380 return 1;
1381 }
1382 if (*buf == TYPE_SCANNER) {
1383 *device_type = TYPE_SCANNER;
1384 *block_length = 0; /* they set their stuff on drivers */
1385 return 1;
1386 }
1387 if (*buf == TYPE_MEDIUM_CHANGER) {
1388 *device_type = TYPE_MEDIUM_CHANGER;
1389 *block_length = 0; /* One never knows, what to expect on a medium
1390 changer device. */
1391 return 1;
1392 }
1393 return 0;
1394 }
1395
1396 static void internal_ibmmca_scsi_setup(char *str, int *ints)
1397 {
1398 int i, j, io_base, id_base;
1399 char *token;
1400
1401 io_base = 0;
1402 id_base = 0;
1403 if (str) {
1404 j = 0;
1405 while ((token = strsep(&str, ",")) != NULL) {
1406 if (!strcmp(token, "activity"))
1407 display_mode |= LED_ACTIVITY;
1408 if (!strcmp(token, "display"))
1409 display_mode |= LED_DISP;
1410 if (!strcmp(token, "adisplay"))
1411 display_mode |= LED_ADISP;
1412 if (!strcmp(token, "normal"))
1413 ibm_ansi_order = 0;
1414 if (!strcmp(token, "ansi"))
1415 ibm_ansi_order = 1;
1416 if (!strcmp(token, "fast"))
1417 global_adapter_speed = 0;
1418 if (!strcmp(token, "medium"))
1419 global_adapter_speed = 4;
1420 if (!strcmp(token, "slow"))
1421 global_adapter_speed = 7;
1422 if ((*token == '-') || (isdigit(*token))) {
1423 if (!(j % 2) && (io_base < IM_MAX_HOSTS))
1424 io_port[io_base++] = simple_strtoul(token, NULL, 0);
1425 if ((j % 2) && (id_base < IM_MAX_HOSTS))
1426 scsi_id[id_base++] = simple_strtoul(token, NULL, 0);
1427 j++;
1428 }
1429 }
1430 } else if (ints) {
1431 for (i = 0; i < IM_MAX_HOSTS && 2 * i + 2 < ints[0]; i++) {
1432 io_port[i] = ints[2 * i + 2];
1433 scsi_id[i] = ints[2 * i + 2];
1434 }
1435 }
1436 return;
1437 }
1438
1439 static int ibmmca_getinfo(char *buf, int slot, void *dev_id)
1440 {
1441 struct Scsi_Host *shpnt;
1442 int len, speciale, connectore, k;
1443 unsigned int pos[8];
1444 unsigned long flags;
1445 struct Scsi_Host *dev = dev_id;
1446
1447 spin_lock_irqsave(dev->host_lock, flags);
1448
1449 shpnt = dev; /* assign host-structure to local pointer */
1450 len = 0; /* set filled text-buffer index to 0 */
1451 /* get the _special contents of the hostdata structure */
1452 speciale = ((struct ibmmca_hostdata *) shpnt->hostdata)->_special;
1453 connectore = ((struct ibmmca_hostdata *) shpnt->hostdata)->_connector_size;
1454 for (k = 2; k < 4; k++)
1455 pos[k] = ((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k];
1456 if (speciale == FORCED_DETECTION) { /* forced detection */
1457 len += sprintf(buf + len,
1458 "Adapter category: forced detected\n" "***************************************\n" "*** Forced detected SCSI Adapter ***\n" "*** No chip-information available ***\n" "***************************************\n");
1459 } else if (speciale == INTEGRATED_SCSI) {
1460 /* if the integrated subsystem has been found automatically: */
1461 len += sprintf(buf + len,
1462 "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");
1463 } else if ((speciale >= 0) && (speciale < (sizeof(subsys_list) / sizeof(struct subsys_list_struct)))) {
1464 /* if the subsystem is a slot adapter */
1465 len += sprintf(buf + len, "Adapter category: slot-card\n" "ROM Segment Address: ");
1466 if ((pos[2] & 0xf0) == 0xf0)
1467 len += sprintf(buf + len, "off\n");
1468 else
1469 len += sprintf(buf + len, "0x%x\n", ((pos[2] & 0xf0) << 13) + 0xc0000);
1470 len += sprintf(buf + len, "Chip status: %s\n", (pos[2] & 1) ? "enabled" : "disabled");
1471 len += sprintf(buf + len, "Adapter I/O Offset: 0x%x\n", ((pos[2] & 0x0e) << 2));
1472 } else {
1473 len += sprintf(buf + len, "Adapter category: unknown\n");
1474 }
1475 /* common subsystem information to write to the slotn file */
1476 len += sprintf(buf + len, "Subsystem PUN: %d\n", shpnt->this_id);
1477 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));
1478 len += sprintf(buf + len, "MCA-slot size: %d bits", connectore);
1479 /* Now make sure, the bufferlength is devidable by 4 to avoid
1480 * paging problems of the buffer. */
1481 while (len % sizeof(int) != (sizeof(int) - 1))
1482 len += sprintf(buf + len, " ");
1483 len += sprintf(buf + len, "\n");
1484
1485 spin_unlock_irqrestore(shpnt->host_lock, flags);
1486
1487 return len;
1488 }
1489
1490 int ibmmca_detect(Scsi_Host_Template * scsi_template)
1491 {
1492 struct Scsi_Host *shpnt;
1493 int port, id, i, j, k, list_size, slot;
1494 int devices_on_irq_11 = 0;
1495 int devices_on_irq_14 = 0;
1496 int IRQ14_registered = 0;
1497 int IRQ11_registered = 0;
1498
1499 found = 0; /* make absolutely sure, that found is set to 0 */
1500
1501 /* First of all, print the version number of the driver. This is
1502 * important to allow better user bugreports in case of already
1503 * having problems with the MCA_bus probing. */
1504 printk(KERN_INFO "IBM MCA SCSI: Version %s\n", IBMMCA_SCSI_DRIVER_VERSION);
1505 /* if this is not MCA machine, return "nothing found" */
1506 if (!MCA_bus) {
1507 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");
1508 return 0;
1509 }
1510
1511 #ifdef MODULE
1512 /* If the driver is run as module, read from conf.modules or cmd-line */
1513 if (boot_options)
1514 option_setup(boot_options);
1515 #endif
1516
1517 /* get interrupt request level */
1518 if (request_irq(IM_IRQ, interrupt_handler, SA_SHIRQ, "ibmmcascsi", hosts)) {
1519 printk(KERN_ERR "IBM MCA SCSI: Unable to get shared IRQ %d.\n", IM_IRQ);
1520 return 0;
1521 } else
1522 IRQ14_registered++;
1523
1524 /* if ibmmcascsi setup option was passed to kernel, return "found" */
1525 for (i = 0; i < IM_MAX_HOSTS; i++)
1526 if (io_port[i] > 0 && scsi_id[i] >= 0 && scsi_id[i] < 8) {
1527 printk("IBM MCA SCSI: forced detected SCSI Adapter, io=0x%x, scsi id=%d.\n", io_port[i], scsi_id[i]);
1528 if ((shpnt = ibmmca_register(scsi_template, io_port[i], scsi_id[i], FORCED_DETECTION, "forced detected SCSI Adapter"))) {
1529 for (k = 2; k < 7; k++)
1530 ((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k] = 0;
1531 ((struct ibmmca_hostdata *) shpnt->hostdata)->_special = FORCED_DETECTION;
1532 mca_set_adapter_name(MCA_INTEGSCSI, "forced detected SCSI Adapter");
1533 mca_set_adapter_procfn(MCA_INTEGSCSI, (MCA_ProcFn) ibmmca_getinfo, shpnt);
1534 mca_mark_as_used(MCA_INTEGSCSI);
1535 devices_on_irq_14++;
1536 }
1537 }
1538 if (found)
1539 return found;
1540
1541 /* The POS2-register of all PS/2 model SCSI-subsystems has the following
1542 * interpretation of bits:
1543 * Bit 7 - 4 : Chip Revision ID (Release)
1544 * Bit 3 - 2 : Reserved
1545 * Bit 1 : 8k NVRAM Disabled
1546 * Bit 0 : Chip Enable (EN-Signal)
1547 * The POS3-register is interpreted as follows:
1548 * Bit 7 - 5 : SCSI ID
1549 * Bit 4 : Reserved = 0
1550 * Bit 3 - 0 : Reserved = 0
1551 * (taken from "IBM, PS/2 Hardware Interface Technical Reference, Common
1552 * Interfaces (1991)").
1553 * In short words, this means, that IBM PS/2 machines only support
1554 * 1 single subsystem by default. The slot-adapters must have another
1555 * configuration on pos2. Here, one has to assume the following
1556 * things for POS2-register:
1557 * Bit 7 - 4 : Chip Revision ID (Release)
1558 * Bit 3 - 1 : port offset factor
1559 * Bit 0 : Chip Enable (EN-Signal)
1560 * As I found a patch here, setting the IO-registers to 0x3540 forced,
1561 * as there was a 0x05 in POS2 on a model 56, I assume, that the
1562 * port 0x3540 must be fix for integrated SCSI-controllers.
1563 * Ok, this discovery leads to the following implementation: (M.Lang) */
1564
1565 /* first look for the IBM SCSI integrated subsystem on the motherboard */
1566 for (j = 0; j < 8; j++) /* read the pos-information */
1567 pos[j] = mca_read_stored_pos(MCA_INTEGSCSI, j);
1568 /* pos2 = pos3 = 0xff if there is no integrated SCSI-subsystem present, but
1569 * if we ignore the settings of all surrounding pos registers, it is not
1570 * completely sufficient to only check pos2 and pos3. */
1571 /* Therefore, now the following if statement is used to
1572 * make sure, we see a real integrated onboard SCSI-interface and no
1573 * internal system information, which gets mapped to some pos registers
1574 * on models 95xx. */
1575 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)) {
1576 if ((pos[2] & 1) == 1) /* is the subsystem chip enabled ? */
1577 port = IM_IO_PORT;
1578 else { /* if disabled, no IRQs will be generated, as the chip won't
1579 * listen to the incoming commands and will do really nothing,
1580 * except for listening to the pos-register settings. If this
1581 * happens, I need to hugely think about it, as one has to
1582 * write something to the MCA-Bus pos register in order to
1583 * enable the chip. Normally, IBM-SCSI won't pass the POST,
1584 * when the chip is disabled (see IBM tech. ref.). */
1585 port = IM_IO_PORT; /* anyway, set the portnumber and warn */
1586 printk("IBM MCA SCSI: WARNING - Your SCSI-subsystem is disabled!\n" " SCSI-operations may not work.\n");
1587 }
1588 id = (pos[3] & 0xe0) >> 5; /* this is correct and represents the PUN */
1589 /* give detailed information on the subsystem. This helps me
1590 * additionally during debugging and analyzing bug-reports. */
1591 printk(KERN_INFO "IBM MCA SCSI: IBM Integrated SCSI Controller ffound, io=0x%x, scsi id=%d,\n", port, id);
1592 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.");
1593
1594 /* register the found integrated SCSI-subsystem */
1595 if ((shpnt = ibmmca_register(scsi_template, port, id, INTEGRATED_SCSI, "IBM Integrated SCSI Controller")))
1596 {
1597 for (k = 2; k < 7; k++)
1598 ((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k] = pos[k];
1599 ((struct ibmmca_hostdata *) shpnt->hostdata)->_special = INTEGRATED_SCSI;
1600 mca_set_adapter_name(MCA_INTEGSCSI, "IBM Integrated SCSI Controller");
1601 mca_set_adapter_procfn(MCA_INTEGSCSI, (MCA_ProcFn) ibmmca_getinfo, shpnt);
1602 mca_mark_as_used(MCA_INTEGSCSI);
1603 devices_on_irq_14++;
1604 }
1605 }
1606
1607 /* now look for other adapters in MCA slots, */
1608 /* determine the number of known IBM-SCSI-subsystem types */
1609 /* see the pos[2] dependence to get the adapter port-offset. */
1610 list_size = sizeof(subsys_list) / sizeof(struct subsys_list_struct);
1611 for (i = 0; i < list_size; i++) {
1612 /* scan each slot for a fitting adapter id */
1613 slot = 0; /* start at slot 0 */
1614 while ((slot = mca_find_adapter(subsys_list[i].mca_id, slot))
1615 != MCA_NOTFOUND) { /* scan through all slots */
1616 for (j = 0; j < 8; j++) /* read the pos-information */
1617 pos[j] = mca_read_stored_pos(slot, j);
1618 if ((pos[2] & 1) == 1)
1619 /* is the subsystem chip enabled ? */
1620 /* (explanations see above) */
1621 port = IM_IO_PORT + ((pos[2] & 0x0e) << 2);
1622 else {
1623 /* anyway, set the portnumber and warn */
1624 port = IM_IO_PORT + ((pos[2] & 0x0e) << 2);
1625 printk(KERN_WARNING "IBM MCA SCSI: WARNING - Your SCSI-subsystem is disabled!\n");
1626 printk(KERN_WARNING " SCSI-operations may not work.\n");
1627 }
1628 if ((i == IBM_SCSI2_FW) && (pos[6] != 0)) {
1629 printk(KERN_ERR "IBM MCA SCSI: ERROR - Wrong POS(6)-register setting!\n");
1630 printk(KERN_ERR " Impossible to determine adapter PUN!\n");
1631 printk(KERN_ERR " Guessing adapter PUN = 7.\n");
1632 id = 7;
1633 } else {
1634 id = (pos[3] & 0xe0) >> 5; /* get subsystem PUN */
1635 if (i == IBM_SCSI2_FW) {
1636 id |= (pos[3] & 0x10) >> 1; /* get subsystem PUN high-bit
1637 * for F/W adapters */
1638 }
1639 }
1640 if ((i == IBM_SCSI2_FW) && (pos[4] & 0x01) && (pos[6] == 0)) {
1641 /* IRQ11 is used by SCSI-2 F/W Adapter/A */
1642 printk(KERN_DEBUG "IBM MCA SCSI: SCSI-2 F/W adapter needs IRQ 11.\n");
1643 /* get interrupt request level */
1644 if (request_irq(IM_IRQ_FW, interrupt_handler, SA_SHIRQ, "ibmmcascsi", hosts)) {
1645 printk(KERN_ERR "IBM MCA SCSI: Unable to get shared IRQ %d.\n", IM_IRQ_FW);
1646 } else
1647 IRQ11_registered++;
1648 }
1649 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);
1650 if ((pos[2] & 0xf0) == 0xf0)
1651 printk(KERN_DEBUG" ROM Addr.=off,");
1652 else
1653 printk(KERN_DEBUG " ROM Addr.=0x%x,", ((pos[2] & 0xf0) << 13) + 0xc0000);
1654 printk(KERN_DEBUG " port-offset=0x%x, subsystem=%s\n", ((pos[2] & 0x0e) << 2), (pos[2] & 1) ? "enabled." : "disabled.");
1655
1656 /* register the hostadapter */
1657 if ((shpnt = ibmmca_register(scsi_template, port, id, i, subsys_list[i].description))) {
1658 for (k = 2; k < 8; k++)
1659 ((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k] = pos[k];
1660 ((struct ibmmca_hostdata *) shpnt->hostdata)->_special = i;
1661 mca_set_adapter_name(slot, subsys_list[i].description);
1662 mca_set_adapter_procfn(slot, (MCA_ProcFn) ibmmca_getinfo, shpnt);
1663 mca_mark_as_used(slot);
1664 if ((i == IBM_SCSI2_FW) && (pos[4] & 0x01) && (pos[6] == 0))
1665 devices_on_irq_11++;
1666 else
1667 devices_on_irq_14++;
1668 }
1669 slot++; /* advance to next slot */
1670 } /* advance to next adapter id in the list of IBM-SCSI-subsystems */
1671 }
1672
1673 /* now check for SCSI-adapters, mapped to the integrated SCSI
1674 * area. E.g. a W/Cache in MCA-slot 9(!). Do the check correct here,
1675 * as this is a known effect on some models 95xx. */
1676 list_size = sizeof(subsys_list) / sizeof(struct subsys_list_struct);
1677 for (i = 0; i < list_size; i++) {
1678 /* scan each slot for a fitting adapter id */
1679 slot = mca_find_adapter(subsys_list[i].mca_id, MCA_INTEGSCSI);
1680 if (slot != MCA_NOTFOUND) { /* scan through all slots */
1681 for (j = 0; j < 8; j++) /* read the pos-information */
1682 pos[j] = mca_read_stored_pos(slot, j);
1683 if ((pos[2] & 1) == 1) { /* is the subsystem chip enabled ? */
1684 /* (explanations see above) */
1685 port = IM_IO_PORT + ((pos[2] & 0x0e) << 2);
1686 } else { /* anyway, set the portnumber and warn */
1687 port = IM_IO_PORT + ((pos[2] & 0x0e) << 2);
1688 printk(KERN_WARNING "IBM MCA SCSI: WARNING - Your SCSI-subsystem is disabled!\n");
1689 printk(KERN_WARNING " SCSI-operations may not work.\n");
1690 }
1691 if ((i == IBM_SCSI2_FW) && (pos[6] != 0)) {
1692 printk(KERN_ERR "IBM MCA SCSI: ERROR - Wrong POS(6)-register setting!\n");
1693 printk(KERN_ERR " Impossible to determine adapter PUN!\n");
1694 printk(KERN_ERR " Guessing adapter PUN = 7.\n");
1695 id = 7;
1696 } else {
1697 id = (pos[3] & 0xe0) >> 5; /* get subsystem PUN */
1698 if (i == IBM_SCSI2_FW)
1699 id |= (pos[3] & 0x10) >> 1; /* get subsystem PUN high-bit
1700 * for F/W adapters */
1701 }
1702 if ((i == IBM_SCSI2_FW) && (pos[4] & 0x01) && (pos[6] == 0)) {
1703 /* IRQ11 is used by SCSI-2 F/W Adapter/A */
1704 printk(KERN_DEBUG "IBM MCA SCSI: SCSI-2 F/W adapter needs IRQ 11.\n");
1705 /* get interrupt request level */
1706 if (request_irq(IM_IRQ_FW, interrupt_handler, SA_SHIRQ, "ibmmcascsi", hosts))
1707 printk(KERN_ERR "IBM MCA SCSI: Unable to get shared IRQ %d.\n", IM_IRQ_FW);
1708 else
1709 IRQ11_registered++;
1710 }
1711 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);
1712 if ((pos[2] & 0xf0) == 0xf0)
1713 printk(KERN_DEBUG " ROM Addr.=off,");
1714 else
1715 printk(KERN_DEBUG " ROM Addr.=0x%x,", ((pos[2] & 0xf0) << 13) + 0xc0000);
1716 printk(KERN_DEBUG " port-offset=0x%x, subsystem=%s\n", ((pos[2] & 0x0e) << 2), (pos[2] & 1) ? "enabled." : "disabled.");
1717
1718 /* register the hostadapter */
1719 if ((shpnt = ibmmca_register(scsi_template, port, id, i, subsys_list[i].description))) {
1720 for (k = 2; k < 7; k++)
1721 ((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k] = pos[k];
1722 ((struct ibmmca_hostdata *) shpnt->hostdata)->_special = i;
1723 mca_set_adapter_name(slot, subsys_list[i].description);
1724 mca_set_adapter_procfn(slot, (MCA_ProcFn) ibmmca_getinfo, shpnt);
1725 mca_mark_as_used(slot);
1726 if ((i == IBM_SCSI2_FW) && (pos[4] & 0x01) && (pos[6] == 0))
1727 devices_on_irq_11++;
1728 else
1729 devices_on_irq_14++;
1730 }
1731 slot++; /* advance to next slot */
1732 } /* advance to next adapter id in the list of IBM-SCSI-subsystems */
1733 }
1734 if (IRQ11_registered && !devices_on_irq_11)
1735 free_irq(IM_IRQ_FW, hosts); /* no devices on IRQ 11 */
1736 if (IRQ14_registered && !devices_on_irq_14)
1737 free_irq(IM_IRQ, hosts); /* no devices on IRQ 14 */
1738 if (!devices_on_irq_11 && !devices_on_irq_14)
1739 printk(KERN_WARNING "IBM MCA SCSI: No IBM SCSI-subsystem adapter attached.\n");
1740 return found; /* return the number of found SCSI hosts. Should be 1 or 0. */
1741 }
1742
1743 static struct Scsi_Host *ibmmca_register(Scsi_Host_Template * scsi_template, int port, int id, int adaptertype, char *hostname)
1744 {
1745 struct Scsi_Host *shpnt;
1746 int i, j;
1747 unsigned int ctrl;
1748
1749 /* check I/O region */
1750 if (!request_region(port, IM_N_IO_PORT, hostname)) {
1751 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);
1752 return NULL;
1753 }
1754
1755 /* register host */
1756 shpnt = scsi_register(scsi_template, sizeof(struct ibmmca_hostdata));
1757 if (!shpnt) {
1758 printk(KERN_ERR "IBM MCA SCSI: Unable to register host.\n");
1759 release_region(port, IM_N_IO_PORT);
1760 return NULL;
1761 }
1762
1763 /* request I/O region */
1764 hosts[found] = shpnt; /* add new found hostadapter to the list */
1765 special(found) = adaptertype; /* important assignment or else crash! */
1766 subsystem_connector_size(found) = 0; /* preset slot-size */
1767 shpnt->irq = IM_IRQ; /* assign necessary stuff for the adapter */
1768 shpnt->io_port = port;
1769 shpnt->n_io_port = IM_N_IO_PORT;
1770 shpnt->this_id = id;
1771 shpnt->max_id = 8; /* 8 PUNs are default */
1772 /* now, the SCSI-subsystem is connected to Linux */
1773
1774 ctrl = (unsigned int) (inb(IM_CTR_REG(found))); /* get control-register status */
1775 #ifdef IM_DEBUG_PROBE
1776 printk("IBM MCA SCSI: Control Register contents: %x, status: %x\n", ctrl, inb(IM_STAT_REG(found)));
1777 printk("IBM MCA SCSI: This adapters' POS-registers: ");
1778 for (i = 0; i < 8; i++)
1779 printk("%x ", pos[i]);
1780 printk("\n");
1781 #endif
1782 reset_status(found) = IM_RESET_NOT_IN_PROGRESS;
1783
1784 for (i = 0; i < 16; i++) /* reset the tables */
1785 for (j = 0; j < 8; j++)
1786 get_ldn(found)[i][j] = MAX_LOG_DEV;
1787
1788 /* check which logical devices exist */
1789 /* after this line, local interrupting is possible: */
1790 local_checking_phase_flag(found) = 1;
1791 check_devices(found, adaptertype); /* call by value, using the global variable hosts */
1792 local_checking_phase_flag(found) = 0;
1793 found++; /* now increase index to be prepared for next found subsystem */
1794 /* an ibm mca subsystem has been detected */
1795 return shpnt;
1796 }
1797
1798 static int ibmmca_release(struct Scsi_Host *shpnt)
1799 {
1800 release_region(shpnt->io_port, shpnt->n_io_port);
1801 if (!(--found))
1802 free_irq(shpnt->irq, hosts);
1803 return 0;
1804 }
1805
1806 /* The following routine is the SCSI command queue for the midlevel driver */
1807 static int ibmmca_queuecommand(Scsi_Cmnd * cmd, void (*done) (Scsi_Cmnd *))
1808 {
1809 unsigned int ldn;
1810 unsigned int scsi_cmd;
1811 struct im_scb *scb;
1812 struct Scsi_Host *shpnt;
1813 int current_ldn;
1814 int id, lun;
1815 int target;
1816 int host_index;
1817 int max_pun;
1818 int i;
1819 struct scatterlist *sl;
1820
1821 shpnt = cmd->device->host;
1822 /* search for the right hostadapter */
1823 for (host_index = 0; hosts[host_index] && hosts[host_index]->host_no != shpnt->host_no; host_index++);
1824
1825 if (!hosts[host_index]) { /* invalid hostadapter descriptor address */
1826 cmd->result = DID_NO_CONNECT << 16;
1827 if (done)
1828 done(cmd);
1829 return 0;
1830 }
1831 max_pun = subsystem_maxid(host_index);
1832 if (ibm_ansi_order) {
1833 target = max_pun - 1 - cmd->device->id;
1834 if ((target <= subsystem_pun(host_index)) && (cmd->device->id <= subsystem_pun(host_index)))
1835 target--;
1836 else if ((target >= subsystem_pun(host_index)) && (cmd->device->id >= subsystem_pun(host_index)))
1837 target++;
1838 } else
1839 target = cmd->device->id;
1840
1841 /* if (target,lun) is NO LUN or not existing at all, return error */
1842 if ((get_scsi(host_index)[target][cmd->device->lun] == TYPE_NO_LUN) || (get_scsi(host_index)[target][cmd->device->lun] == TYPE_NO_DEVICE)) {
1843 cmd->result = DID_NO_CONNECT << 16;
1844 if (done)
1845 done(cmd);
1846 return 0;
1847 }
1848
1849 /*if (target,lun) unassigned, do further checks... */
1850 ldn = get_ldn(host_index)[target][cmd->device->lun];
1851 if (ldn >= MAX_LOG_DEV) { /* on invalid ldn do special stuff */
1852 if (ldn > MAX_LOG_DEV) { /* dynamical remapping if ldn unassigned */
1853 current_ldn = next_ldn(host_index); /* stop-value for one circle */
1854 while (ld(host_index)[next_ldn(host_index)].cmd) { /* search for a occupied, but not in */
1855 /* command-processing ldn. */
1856 next_ldn(host_index)++;
1857 if (next_ldn(host_index) >= MAX_LOG_DEV)
1858 next_ldn(host_index) = 7;
1859 if (current_ldn == next_ldn(host_index)) { /* One circle done ? */
1860 /* no non-processing ldn found */
1861 printk("IBM MCA SCSI: Cannot assign SCSI-device dynamically!\n" " On ldn 7-14 SCSI-commands everywhere in progress.\n" " Reporting DID_NO_CONNECT for device (%d,%d).\n", target, cmd->device->lun);
1862 cmd->result = DID_NO_CONNECT << 16; /* return no connect */
1863 if (done)
1864 done(cmd);
1865 return 0;
1866 }
1867 }
1868
1869 /* unmap non-processing ldn */
1870 for (id = 0; id < max_pun; id++)
1871 for (lun = 0; lun < 8; lun++) {
1872 if (get_ldn(host_index)[id][lun] == next_ldn(host_index)) {
1873 get_ldn(host_index)[id][lun] = TYPE_NO_DEVICE;
1874 get_scsi(host_index)[id][lun] = TYPE_NO_DEVICE;
1875 /* unmap entry */
1876 }
1877 }
1878 /* set reduced interrupt_handler-mode for checking */
1879 local_checking_phase_flag(host_index) = 1;
1880 /* map found ldn to pun,lun */
1881 get_ldn(host_index)[target][cmd->device->lun] = next_ldn(host_index);
1882 /* change ldn to the right value, that is now next_ldn */
1883 ldn = next_ldn(host_index);
1884 /* unassign all ldns (pun,lun,ldn does not matter for remove) */
1885 immediate_assign(host_index, 0, 0, 0, REMOVE_LDN);
1886 /* set only LDN for remapped device */
1887 immediate_assign(host_index, target, cmd->device->lun, ldn, SET_LDN);
1888 /* get device information for ld[ldn] */
1889 if (device_exists(host_index, ldn, &ld(host_index)[ldn].block_length, &ld(host_index)[ldn].device_type)) {
1890 ld(host_index)[ldn].cmd = NULL; /* To prevent panic set 0, because
1891 devices that were not assigned,
1892 should have nothing in progress. */
1893 get_scsi(host_index)[target][cmd->device->lun] = ld(host_index)[ldn].device_type;
1894 /* increase assignment counters for statistics in /proc */
1895 IBM_DS(host_index).dynamical_assignments++;
1896 IBM_DS(host_index).ldn_assignments[ldn]++;
1897 } else
1898 /* panic here, because a device, found at boottime has
1899 vanished */
1900 panic("IBM MCA SCSI: ldn=0x%x, SCSI-device on (%d,%d) vanished!\n", ldn, target, cmd->device->lun);
1901 /* unassign again all ldns (pun,lun,ldn does not matter for remove) */
1902 immediate_assign(host_index, 0, 0, 0, REMOVE_LDN);
1903 /* remap all ldns, as written in the pun/lun table */
1904 lun = 0;
1905 #ifdef CONFIG_SCSI_MULTI_LUN
1906 for (lun = 0; lun < 8; lun++)
1907 #endif
1908 for (id = 0; id < max_pun; id++) {
1909 if (get_ldn(host_index)[id][lun] <= MAX_LOG_DEV)
1910 immediate_assign(host_index, id, lun, get_ldn(host_index)[id][lun], SET_LDN);
1911 }
1912 /* set back to normal interrupt_handling */
1913 local_checking_phase_flag(host_index) = 0;
1914 #ifdef IM_DEBUG_PROBE
1915 /* Information on syslog terminal */
1916 printk("IBM MCA SCSI: ldn=0x%x dynamically reassigned to (%d,%d).\n", ldn, target, cmd->device->lun);
1917 #endif
1918 /* increase next_ldn for next dynamical assignment */
1919 next_ldn(host_index)++;
1920 if (next_ldn(host_index) >= MAX_LOG_DEV)
1921 next_ldn(host_index) = 7;
1922 } else { /* wall against Linux accesses to the subsystem adapter */
1923 cmd->result = DID_BAD_TARGET << 16;
1924 if (done)
1925 done(cmd);
1926 return 0;
1927 }
1928 }
1929
1930 /*verify there is no command already in progress for this log dev */
1931 if (ld(host_index)[ldn].cmd)
1932 panic("IBM MCA SCSI: cmd already in progress for this ldn.\n");
1933
1934 /*save done in cmd, and save cmd for the interrupt handler */
1935 cmd->scsi_done = done;
1936 ld(host_index)[ldn].cmd = cmd;
1937
1938 /*fill scb information independent of the scsi command */
1939 scb = &(ld(host_index)[ldn].scb);
1940 ld(host_index)[ldn].tsb.dev_status = 0;
1941 scb->enable = IM_REPORT_TSB_ONLY_ON_ERROR | IM_RETRY_ENABLE;
1942 scb->tsb_adr = isa_virt_to_bus(&(ld(host_index)[ldn].tsb));
1943 scsi_cmd = cmd->cmnd[0];
1944
1945 if (cmd->use_sg) {
1946 i = cmd->use_sg;
1947 sl = (struct scatterlist *) (cmd->request_buffer);
1948 if (i > 16)
1949 panic("IBM MCA SCSI: scatter-gather list too long.\n");
1950 while (--i >= 0) {
1951 ld(host_index)[ldn].sge[i].address = (void *) (isa_page_to_bus(sl[i].page) + sl[i].offset);
1952 ld(host_index)[ldn].sge[i].byte_length = sl[i].length;
1953 }
1954 scb->enable |= IM_POINTER_TO_LIST;
1955 scb->sys_buf_adr = isa_virt_to_bus(&(ld(host_index)[ldn].sge[0]));
1956 scb->sys_buf_length = cmd->use_sg * sizeof(struct im_sge);
1957 } else {
1958 scb->sys_buf_adr = isa_virt_to_bus(cmd->request_buffer);
1959 /* recent Linux midlevel SCSI places 1024 byte for inquiry
1960 * command. Far too much for old PS/2 hardware. */
1961 switch (scsi_cmd) {
1962 /* avoid command errors by setting bufferlengths to
1963 * ANSI-standard. Beware of forcing it to 255,
1964 * this could SEGV the kernel!!! */
1965 case INQUIRY:
1966 case REQUEST_SENSE:
1967 case MODE_SENSE:
1968 case MODE_SELECT:
1969 if (cmd->request_bufflen > 255)
1970 scb->sys_buf_length = 255;
1971 else
1972 scb->sys_buf_length = cmd->request_bufflen;
1973 break;
1974 case TEST_UNIT_READY:
1975 scb->sys_buf_length = 0;
1976 break;
1977 default:
1978 scb->sys_buf_length = cmd->request_bufflen;
1979 break;
1980 }
1981 }
1982 /*fill scb information dependent on scsi command */
1983
1984 #ifdef IM_DEBUG_CMD
1985 printk("issue scsi cmd=%02x to ldn=%d\n", scsi_cmd, ldn);
1986 #endif
1987
1988 /* for specific device-type debugging: */
1989 #ifdef IM_DEBUG_CMD_SPEC_DEV
1990 if (ld(host_index)[ldn].device_type == IM_DEBUG_CMD_DEVICE)
1991 printk("(SCSI-device-type=0x%x) issue scsi cmd=%02x to ldn=%d\n", ld(host_index)[ldn].device_type, scsi_cmd, ldn);
1992 #endif
1993
1994 /* for possible panics store current command */
1995 last_scsi_command(host_index)[ldn] = scsi_cmd;
1996 last_scsi_type(host_index)[ldn] = IM_SCB;
1997 /* update statistical info */
1998 IBM_DS(host_index).total_accesses++;
1999 IBM_DS(host_index).ldn_access[ldn]++;
2000
2001 switch (scsi_cmd) {
2002 case READ_6:
2003 case WRITE_6:
2004 case READ_10:
2005 case WRITE_10:
2006 case READ_12:
2007 case WRITE_12:
2008 /* Distinguish between disk and other devices. Only disks (that are the
2009 most frequently accessed devices) should be supported by the
2010 IBM-SCSI-Subsystem commands. */
2011 switch (ld(host_index)[ldn].device_type) {
2012 case TYPE_DISK: /* for harddisks enter here ... */
2013 case TYPE_MOD: /* ... try it also for MO-drives (send flames as */
2014 /* you like, if this won't work.) */
2015 if (scsi_cmd == READ_6 || scsi_cmd == READ_10 || scsi_cmd == READ_12) {
2016 /* read command preparations */
2017 scb->enable |= IM_READ_CONTROL;
2018 IBM_DS(host_index).ldn_read_access[ldn]++; /* increase READ-access on ldn stat. */
2019 scb->command = IM_READ_DATA_CMD | IM_NO_DISCONNECT;
2020 } else { /* write command preparations */
2021 IBM_DS(host_index).ldn_write_access[ldn]++; /* increase write-count on ldn stat. */
2022 scb->command = IM_WRITE_DATA_CMD | IM_NO_DISCONNECT;
2023 }
2024 if (scsi_cmd == READ_6 || scsi_cmd == WRITE_6) {
2025 scb->u1.log_blk_adr = (((unsigned) cmd->cmnd[3]) << 0) | (((unsigned) cmd->cmnd[2]) << 8) | ((((unsigned) cmd->cmnd[1]) & 0x1f) << 16);
2026 scb->u2.blk.count = (unsigned) cmd->cmnd[4];
2027 } else {
2028 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);
2029 scb->u2.blk.count = (((unsigned) cmd->cmnd[8]) << 0) | (((unsigned) cmd->cmnd[7]) << 8);
2030 }
2031 last_scsi_logical_block(host_index)[ldn] = scb->u1.log_blk_adr;
2032 last_scsi_blockcount(host_index)[ldn] = scb->u2.blk.count;
2033 scb->u2.blk.length = ld(host_index)[ldn].block_length;
2034 break;
2035 /* for other devices, enter here. Other types are not known by
2036 Linux! TYPE_NO_LUN is forbidden as valid device. */
2037 case TYPE_ROM:
2038 case TYPE_TAPE:
2039 case TYPE_PROCESSOR:
2040 case TYPE_WORM:
2041 case TYPE_SCANNER:
2042 case TYPE_MEDIUM_CHANGER:
2043 /* If there is a sequential-device, IBM recommends to use
2044 IM_OTHER_SCSI_CMD_CMD instead of subsystem READ/WRITE.
2045 This includes CD-ROM devices, too, due to the partial sequential
2046 read capabilities. */
2047 scb->command = IM_OTHER_SCSI_CMD_CMD;
2048 if (scsi_cmd == READ_6 || scsi_cmd == READ_10 || scsi_cmd == READ_12)
2049 /* enable READ */
2050 scb->enable |= IM_READ_CONTROL;
2051 scb->enable |= IM_BYPASS_BUFFER;
2052 scb->u1.scsi_cmd_length = cmd->cmd_len;
2053 memcpy(scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len);
2054 last_scsi_type(host_index)[ldn] = IM_LONG_SCB;
2055 /* Read/write on this non-disk devices is also displayworthy,
2056 so flash-up the LED/display. */
2057 break;
2058 }
2059 break;
2060 case INQUIRY:
2061 IBM_DS(host_index).ldn_inquiry_access[ldn]++;
2062 scb->command = IM_DEVICE_INQUIRY_CMD;
2063 scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER;
2064 scb->u1.log_blk_adr = 0;
2065 break;
2066 case TEST_UNIT_READY:
2067 scb->command = IM_OTHER_SCSI_CMD_CMD;
2068 scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER;
2069 scb->u1.log_blk_adr = 0;
2070 scb->u1.scsi_cmd_length = 6;
2071 memcpy(scb->u2.scsi_command, cmd->cmnd, 6);
2072 last_scsi_type(host_index)[ldn] = IM_LONG_SCB;
2073 break;
2074 case READ_CAPACITY:
2075 /* the length of system memory buffer must be exactly 8 bytes */
2076 scb->command = IM_READ_CAPACITY_CMD;
2077 scb->enable |= IM_READ_CONTROL | IM_BYPASS_BUFFER;
2078 if (scb->sys_buf_length > 8)
2079 scb->sys_buf_length = 8;
2080 break;
2081 /* Commands that need read-only-mode (system <- device): */
2082 case REQUEST_SENSE:
2083 scb->command = IM_REQUEST_SENSE_CMD;
2084 scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER;
2085 break;
2086 /* Commands that need write-only-mode (system -> device): */
2087 case MODE_SELECT:
2088 case MODE_SELECT_10:
2089 IBM_DS(host_index).ldn_modeselect_access[ldn]++;
2090 scb->command = IM_OTHER_SCSI_CMD_CMD;
2091 scb->enable |= IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER; /*Select needs WRITE-enabled */
2092 scb->u1.scsi_cmd_length = cmd->cmd_len;
2093 memcpy(scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len);
2094 last_scsi_type(host_index)[ldn] = IM_LONG_SCB;
2095 break;
2096 /* For other commands, read-only is useful. Most other commands are
2097 running without an input-data-block. */
2098 default:
2099 scb->command = IM_OTHER_SCSI_CMD_CMD;
2100 scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER;
2101 scb->u1.scsi_cmd_length = cmd->cmd_len;
2102 memcpy(scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len);
2103 last_scsi_type(host_index)[ldn] = IM_LONG_SCB;
2104 break;
2105 }
2106 /*issue scb command, and return */
2107 if (++disk_rw_in_progress == 1)
2108 PS2_DISK_LED_ON(shpnt->host_no, target);
2109
2110 if (last_scsi_type(host_index)[ldn] == IM_LONG_SCB) {
2111 issue_cmd(host_index, isa_virt_to_bus(scb), IM_LONG_SCB | ldn);
2112 IBM_DS(host_index).long_scbs++;
2113 } else {
2114 issue_cmd(host_index, isa_virt_to_bus(scb), IM_SCB | ldn);
2115 IBM_DS(host_index).scbs++;
2116 }
2117 return 0;
2118 }
2119
2120 static int __ibmmca_abort(Scsi_Cmnd * cmd)
2121 {
2122 /* Abort does not work, as the adapter never generates an interrupt on
2123 * whatever situation is simulated, even when really pending commands
2124 * are running on the adapters' hardware ! */
2125
2126 struct Scsi_Host *shpnt;
2127 unsigned int ldn;
2128 void (*saved_done) (Scsi_Cmnd *);
2129 int target;
2130 int host_index;
2131 int max_pun;
2132 unsigned long imm_command;
2133
2134 #ifdef IM_DEBUG_PROBE
2135 printk("IBM MCA SCSI: Abort subroutine called...\n");
2136 #endif
2137
2138 shpnt = cmd->device->host;
2139 /* search for the right hostadapter */
2140 for (host_index = 0; hosts[host_index] && hosts[host_index]->host_no != shpnt->host_no; host_index++);
2141
2142 if (!hosts[host_index]) { /* invalid hostadapter descriptor address */
2143 cmd->result = DID_NO_CONNECT << 16;
2144 if (cmd->scsi_done)
2145 (cmd->scsi_done) (cmd);
2146 shpnt = cmd->device->host;
2147 #ifdef IM_DEBUG_PROBE
2148 printk(KERN_DEBUG "IBM MCA SCSI: Abort adapter selection failed!\n");
2149 #endif
2150 return SUCCESS;
2151 }
2152 max_pun = subsystem_maxid(host_index);
2153 if (ibm_ansi_order) {
2154 target = max_pun - 1 - cmd->device->id;
2155 if ((target <= subsystem_pun(host_index)) && (cmd->device->id <= subsystem_pun(host_index)))
2156 target--;
2157 else if ((target >= subsystem_pun(host_index)) && (cmd->device->id >= subsystem_pun(host_index)))
2158 target++;
2159 } else
2160 target = cmd->device->id;
2161
2162 /* get logical device number, and disable system interrupts */
2163 printk(KERN_WARNING "IBM MCA SCSI: Sending abort to device pun=%d, lun=%d.\n", target, cmd->device->lun);
2164 ldn = get_ldn(host_index)[target][cmd->device->lun];
2165
2166 /*if cmd for this ldn has already finished, no need to abort */
2167 if (!ld(host_index)[ldn].cmd) {
2168 return SUCCESS;
2169 }
2170
2171 /* Clear ld.cmd, save done function, install internal done,
2172 * send abort immediate command (this enables sys. interrupts),
2173 * and wait until the interrupt arrives.
2174 */
2175 saved_done = cmd->scsi_done;
2176 cmd->scsi_done = internal_done;
2177 cmd->SCp.Status = 0;
2178 last_scsi_command(host_index)[ldn] = IM_ABORT_IMM_CMD;
2179 last_scsi_type(host_index)[ldn] = IM_IMM_CMD;
2180 imm_command = inl(IM_CMD_REG(host_index));
2181 imm_command &= (unsigned long) (0xffff0000); /* mask reserved stuff */
2182 imm_command |= (unsigned long) (IM_ABORT_IMM_CMD);
2183 /* must wait for attention reg not busy */
2184 /* FIXME - timeout, politeness */
2185 while (1) {
2186 if (!(inb(IM_STAT_REG(host_index)) & IM_BUSY))
2187 break;
2188 }
2189 /* write registers and enable system interrupts */
2190 outl(imm_command, IM_CMD_REG(host_index));
2191 outb(IM_IMM_CMD | ldn, IM_ATTN_REG(host_index));
2192 #ifdef IM_DEBUG_PROBE
2193 printk("IBM MCA SCSI: Abort queued to adapter...\n");
2194 #endif
2195 spin_unlock_irq(shpnt->host_lock);
2196 while (!cmd->SCp.Status)
2197 yield();
2198 spin_lock_irq(shpnt->host_lock);
2199 cmd->scsi_done = saved_done;
2200 #ifdef IM_DEBUG_PROBE
2201 printk("IBM MCA SCSI: Abort returned with adapter response...\n");
2202 #endif
2203
2204 /*if abort went well, call saved done, then return success or error */
2205 if (cmd->result == (DID_ABORT << 16))
2206 {
2207 cmd->result |= DID_ABORT << 16;
2208 if (cmd->scsi_done)
2209 (cmd->scsi_done) (cmd);
2210 ld(host_index)[ldn].cmd = NULL;
2211 #ifdef IM_DEBUG_PROBE
2212 printk("IBM MCA SCSI: Abort finished with success.\n");
2213 #endif
2214 return SUCCESS;
2215 } else {
2216 cmd->result |= DID_NO_CONNECT << 16;
2217 if (cmd->scsi_done)
2218 (cmd->scsi_done) (cmd);
2219 ld(host_index)[ldn].cmd = NULL;
2220 #ifdef IM_DEBUG_PROBE
2221 printk("IBM MCA SCSI: Abort failed.\n");
2222 #endif
2223 return FAILED;
2224 }
2225 }
2226
2227 static int ibmmca_abort(Scsi_Cmnd * cmd)
2228 {
2229 struct Scsi_Host *shpnt = cmd->device->host;
2230 int rc;
2231
2232 spin_lock_irq(shpnt->host_lock);
2233 rc = __ibmmca_abort(cmd);
2234 spin_unlock_irq(shpnt->host_lock);
2235
2236 return rc;
2237 }
2238
2239 static int __ibmmca_host_reset(Scsi_Cmnd * cmd)
2240 {
2241 struct Scsi_Host *shpnt;
2242 Scsi_Cmnd *cmd_aid;
2243 int ticks, i;
2244 int host_index;
2245 unsigned long imm_command;
2246
2247 if (cmd == NULL)
2248 BUG();
2249
2250 ticks = IM_RESET_DELAY * HZ;
2251 shpnt = cmd->device->host;
2252 /* search for the right hostadapter */
2253 for (host_index = 0; hosts[host_index] && hosts[host_index]->host_no != shpnt->host_no; host_index++);
2254
2255 if (!hosts[host_index]) /* invalid hostadapter descriptor address */
2256 return FAILED;
2257
2258 if (local_checking_phase_flag(host_index)) {
2259 printk(KERN_WARNING "IBM MCA SCSI: unable to reset while checking devices.\n");
2260 return FAILED;
2261 }
2262
2263 /* issue reset immediate command to subsystem, and wait for interrupt */
2264 printk("IBM MCA SCSI: resetting all devices.\n");
2265 reset_status(host_index) = IM_RESET_IN_PROGRESS;
2266 last_scsi_command(host_index)[0xf] = IM_RESET_IMM_CMD;
2267 last_scsi_type(host_index)[0xf] = IM_IMM_CMD;
2268 imm_command = inl(IM_CMD_REG(host_index));
2269 imm_command &= (unsigned long) (0xffff0000); /* mask reserved stuff */
2270 imm_command |= (unsigned long) (IM_RESET_IMM_CMD);
2271 /* must wait for attention reg not busy */
2272 while (1) {
2273 if (!(inb(IM_STAT_REG(host_index)) & IM_BUSY))
2274 break;
2275 spin_unlock_irq(shpnt->host_lock);
2276 yield();
2277 spin_lock_irq(shpnt->host_lock);
2278 }
2279 /*write registers and enable system interrupts */
2280 outl(imm_command, IM_CMD_REG(host_index));
2281 outb(IM_IMM_CMD | 0xf, IM_ATTN_REG(host_index));
2282 /* wait for interrupt finished or intr_stat register to be set, as the
2283 * interrupt will not be executed, while we are in here! */
2284
2285 /* FIXME: This is really really icky we so want a sleeping version of this ! */
2286 while (reset_status(host_index) == IM_RESET_IN_PROGRESS && --ticks && ((inb(IM_INTR_REG(host_index)) & 0x8f) != 0x8f)) {
2287 udelay((1 + 999 / HZ) * 1000);
2288 barrier();
2289 }
2290 /* if reset did not complete, just return an error */
2291 if (!ticks) {
2292 printk(KERN_ERR "IBM MCA SCSI: reset did not complete within %d seconds.\n", IM_RESET_DELAY);
2293 reset_status(host_index) = IM_RESET_FINISHED_FAIL;
2294 return FAILED;
2295 }
2296
2297 if ((inb(IM_INTR_REG(host_index)) & 0x8f) == 0x8f) {
2298 /* analysis done by this routine and not by the intr-routine */
2299 if (inb(IM_INTR_REG(host_index)) == 0xaf)
2300 reset_status(host_index) = IM_RESET_FINISHED_OK_NO_INT;
2301 else if (inb(IM_INTR_REG(host_index)) == 0xcf)
2302 reset_status(host_index) = IM_RESET_FINISHED_FAIL;
2303 else /* failed, 4get it */
2304 reset_status(host_index) = IM_RESET_NOT_IN_PROGRESS_NO_INT;
2305 outb(IM_EOI | 0xf, IM_ATTN_REG(host_index));
2306 }
2307
2308 /* if reset failed, just return an error */
2309 if (reset_status(host_index) == IM_RESET_FINISHED_FAIL) {
2310 printk(KERN_ERR "IBM MCA SCSI: reset failed.\n");
2311 return FAILED;
2312 }
2313
2314 /* so reset finished ok - call outstanding done's, and return success */
2315 printk(KERN_INFO "IBM MCA SCSI: Reset successfully completed.\n");
2316 for (i = 0; i < MAX_LOG_DEV; i++) {
2317 cmd_aid = ld(host_index)[i].cmd;
2318 if (cmd_aid && cmd_aid->scsi_done) {
2319 ld(host_index)[i].cmd = NULL;
2320 cmd_aid->result = DID_RESET << 16;
2321 }
2322 }
2323 return SUCCESS;
2324 }
2325
2326 static int ibmmca_host_reset(Scsi_Cmnd * cmd)
2327 {
2328 struct Scsi_Host *shpnt = cmd->device->host;
2329 int rc;
2330
2331 spin_lock_irq(shpnt->host_lock);
2332 rc = __ibmmca_host_reset(cmd);
2333 spin_unlock_irq(shpnt->host_lock);
2334
2335 return rc;
2336 }
2337
2338 static int ibmmca_biosparam(struct scsi_device *sdev, struct block_device *bdev, sector_t capacity, int *info)
2339 {
2340 int size = capacity;
2341 info[0] = 64;
2342 info[1] = 32;
2343 info[2] = size / (info[0] * info[1]);
2344 if (info[2] >= 1024) {
2345 info[0] = 128;
2346 info[1] = 63;
2347 info[2] = size / (info[0] * info[1]);
2348 if (info[2] >= 1024) {
2349 info[0] = 255;
2350 info[1] = 63;
2351 info[2] = size / (info[0] * info[1]);
2352 if (info[2] >= 1024)
2353 info[2] = 1023;
2354 }
2355 }
2356 return 0;
2357 }
2358
2359 /* calculate percentage of total accesses on a ldn */
2360 static int ldn_access_load(int host_index, int ldn)
2361 {
2362 if (IBM_DS(host_index).total_accesses == 0)
2363 return (0);
2364 if (IBM_DS(host_index).ldn_access[ldn] == 0)
2365 return (0);
2366 return (IBM_DS(host_index).ldn_access[ldn] * 100) / IBM_DS(host_index).total_accesses;
2367 }
2368
2369 /* calculate total amount of r/w-accesses */
2370 static int ldn_access_total_read_write(int host_index)
2371 {
2372 int a;
2373 int i;
2374
2375 a = 0;
2376 for (i = 0; i <= MAX_LOG_DEV; i++)
2377 a += IBM_DS(host_index).ldn_read_access[i] + IBM_DS(host_index).ldn_write_access[i];
2378 return (a);
2379 }
2380
2381 static int ldn_access_total_inquiry(int host_index)
2382 {
2383 int a;
2384 int i;
2385
2386 a = 0;
2387 for (i = 0; i <= MAX_LOG_DEV; i++)
2388 a += IBM_DS(host_index).ldn_inquiry_access[i];
2389 return (a);
2390 }
2391
2392 static int ldn_access_total_modeselect(int host_index)
2393 {
2394 int a;
2395 int i;
2396
2397 a = 0;
2398 for (i = 0; i <= MAX_LOG_DEV; i++)
2399 a += IBM_DS(host_index).ldn_modeselect_access[i];
2400 return (a);
2401 }
2402
2403 /* routine to display info in the proc-fs-structure (a deluxe feature) */
2404 static int ibmmca_proc_info(struct Scsi_Host *shpnt, char *buffer, char **start, off_t offset, int length, int inout)
2405 {
2406 int len = 0;
2407 int i, id, lun, host_index;
2408 unsigned long flags;
2409 int max_pun;
2410
2411 for (i = 0; hosts[i] && hosts[i] != shpnt; i++);
2412
2413 spin_lock_irqsave(hosts[i]->host_lock, flags); /* Check it */
2414 host_index = i;
2415 if (!shpnt) {
2416 len += sprintf(buffer + len, "\nIBM MCA SCSI: Can't find adapter for host number %d\n",
2417 shpnt->host_no);
2418 return len;
2419 }
2420 max_pun = subsystem_maxid(host_index);
2421
2422 len += sprintf(buffer + len, "\n IBM-SCSI-Subsystem-Linux-Driver, Version %s\n\n\n", IBMMCA_SCSI_DRIVER_VERSION);
2423 len += sprintf(buffer + len, " SCSI Access-Statistics:\n");
2424 len += sprintf(buffer + len, " Device Scanning Order....: %s\n", (ibm_ansi_order) ? "IBM/ANSI" : "New Industry Standard");
2425 #ifdef CONFIG_SCSI_MULTI_LUN
2426 len += sprintf(buffer + len, " Multiple LUN probing.....: Yes\n");
2427 #else
2428 len += sprintf(buffer + len, " Multiple LUN probing.....: No\n");
2429 #endif
2430 len += sprintf(buffer + len, " This Hostnumber..........: %d\n", shpnt->host_no);
2431 len += sprintf(buffer + len, " Base I/O-Port............: 0x%x\n", (unsigned int) (IM_CMD_REG(host_index)));
2432 len += sprintf(buffer + len, " (Shared) IRQ.............: %d\n", IM_IRQ);
2433 len += sprintf(buffer + len, " Total Interrupts.........: %d\n", IBM_DS(host_index).total_interrupts);
2434 len += sprintf(buffer + len, " Total SCSI Accesses......: %d\n", IBM_DS(host_index).total_accesses);
2435 len += sprintf(buffer + len, " Total short SCBs.........: %d\n", IBM_DS(host_index).scbs);
2436 len += sprintf(buffer + len, " Total long SCBs..........: %d\n", IBM_DS(host_index).long_scbs);
2437 len += sprintf(buffer + len, " Total SCSI READ/WRITE..: %d\n", ldn_access_total_read_write(host_index));
2438 len += sprintf(buffer + len, " Total SCSI Inquiries...: %d\n", ldn_access_total_inquiry(host_index));
2439 len += sprintf(buffer + len, " Total SCSI Modeselects.: %d\n", ldn_access_total_modeselect(host_index));
2440 len += sprintf(buffer + len, " Total SCSI other cmds..: %d\n", IBM_DS(host_index).total_accesses - ldn_access_total_read_write(host_index)
2441 - ldn_access_total_modeselect(host_index)
2442 - ldn_access_total_inquiry(host_index));
2443 len += sprintf(buffer + len, " Total SCSI command fails.: %d\n\n", IBM_DS(host_index).total_errors);
2444 len += sprintf(buffer + len, " Logical-Device-Number (LDN) Access-Statistics:\n");
2445 len += sprintf(buffer + len, " LDN | Accesses [%%] | READ | WRITE | ASSIGNMENTS\n");
2446 len += sprintf(buffer + len, " -----|--------------|-----------|-----------|--------------\n");
2447 for (i = 0; i <= MAX_LOG_DEV; i++)
2448 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]);
2449 len += sprintf(buffer + len, " -----------------------------------------------------------\n\n");
2450 len += sprintf(buffer + len, " Dynamical-LDN-Assignment-Statistics:\n");
2451 len += sprintf(buffer + len, " Number of physical SCSI-devices..: %d (+ Adapter)\n", IBM_DS(host_index).total_scsi_devices);
2452 len += sprintf(buffer + len, " Dynamical Assignment necessary...: %s\n", IBM_DS(host_index).dyn_flag ? "Yes" : "No ");
2453 len += sprintf(buffer + len, " Next LDN to be assigned..........: 0x%x\n", next_ldn(host_index));
2454 len += sprintf(buffer + len, " Dynamical assignments done yet...: %d\n", IBM_DS(host_index).dynamical_assignments);
2455 len += sprintf(buffer + len, "\n Current SCSI-Device-Mapping:\n");
2456 len += sprintf(buffer + len, " Physical SCSI-Device Map Logical SCSI-Device Map\n");
2457 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");
2458 for (id = 0; id < max_pun; id++) {
2459 len += sprintf(buffer + len, " %2d ", id);
2460 for (lun = 0; lun < 8; lun++)
2461 len += sprintf(buffer + len, "%2s ", ti_p(get_scsi(host_index)[id][lun]));
2462 len += sprintf(buffer + len, " %2d ", id);
2463 for (lun = 0; lun < 8; lun++)
2464 len += sprintf(buffer + len, "%2s ", ti_l(get_ldn(host_index)[id][lun]));
2465 len += sprintf(buffer + len, "\n");
2466 }
2467
2468 len += sprintf(buffer + len, "(A = IBM-Subsystem, D = Harddisk, T = Tapedrive, P = Processor, W = WORM,\n");
2469 len += sprintf(buffer + len, " R = CD-ROM, S = Scanner, M = MO-Drive, C = Medium-Changer, + = unprovided LUN,\n");
2470 len += sprintf(buffer + len, " - = nothing found, nothing assigned or unprobed LUN)\n\n");
2471
2472 *start = buffer + offset;
2473 len -= offset;
2474 if (len > length)
2475 len = length;
2476 spin_unlock_irqrestore(shpnt->host_lock, flags);
2477 return len;
2478 }
2479
2480 static int option_setup(char *str)
2481 {
2482 int ints[IM_MAX_HOSTS];
2483 char *cur = str;
2484 int i = 1;
2485
2486 while (cur && isdigit(*cur) && i <= IM_MAX_HOSTS) {
2487 ints[i++] = simple_strtoul(cur, NULL, 0);
2488 if ((cur = strchr(cur, ',')) != NULL)
2489 cur++;
2490 }
2491 ints[0] = i - 1;
2492 internal_ibmmca_scsi_setup(cur, ints);
2493 return 0;
2494 }
2495
2496 __setup("ibmmcascsi=", option_setup);
2497
2498 static Scsi_Host_Template driver_template = {
2499 .proc_name = "ibmmca",
2500 .proc_info = ibmmca_proc_info,
2501 .name = "IBM SCSI-Subsystem",
2502 .detect = ibmmca_detect,
2503 .release = ibmmca_release,
2504 .queuecommand = ibmmca_queuecommand,
2505 .eh_abort_handler = ibmmca_abort,
2506 .eh_host_reset_handler = ibmmca_host_reset,
2507 .bios_param = ibmmca_biosparam,
2508 .can_queue = 16,
2509 .this_id = 7,
2510 .sg_tablesize = 16,
2511 .cmd_per_lun = 1,
2512 .use_clustering = ENABLE_CLUSTERING,
2513 };
2514 #include "scsi_module.c"
kernel-based virtual machine