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