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[SCSI] drivers/scsi: Use ARRAY_SIZE macro
[linux-block.git] / drivers / scsi / ibmmca.c
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1da177e4
LT		 1/*
2 Low Level Linux Driver for the IBM Microchannel SCSI Subsystem for
3 Linux Kernel >= 2.4.0.
4 Copyright (c) 1995 Strom Systems, Inc. under the terms of the GNU
5 General Public License. Written by Martin Kolinek, December 1995.
6 Further development by: Chris Beauregard, Klaus Kudielka, Michael Lang
7 See the file Documentation/scsi/ibmmca.txt for a detailed description
8 of this driver, the commandline arguments and the history of its
9 development.
10 See the WWW-page: http://www.uni-mainz.de/~langm000/linux.html for latest
11 updates, info and ADF-files for adapters supported by this driver.
12
13 Alan Cox <alan@redhat.com>
14 Updated for Linux 2.5.45 to use the new error handler, cleaned up the
15 lock macros and did a few unavoidable locking tweaks, plus one locking
16 fix in the irq and completion path.
17
18 */
19
20#include <linux/config.h>
1da177e4
LT		 21#include <linux/module.h>
22#include <linux/kernel.h>
23#include <linux/types.h>
24#include <linux/ctype.h>
25#include <linux/string.h>
26#include <linux/interrupt.h>
27#include <linux/ioport.h>
28#include <linux/delay.h>
29#include <linux/blkdev.h>
30#include <linux/proc_fs.h>
31#include <linux/stat.h>
32#include <linux/mca.h>
1da177e4
LT		 33#include <linux/spinlock.h>
34#include <linux/init.h>
35#include <linux/mca-legacy.h>
36
37#include <asm/system.h>
38#include <asm/io.h>
39
40#include "scsi.h"
41#include <scsi/scsi_host.h>
42#include "ibmmca.h"
43
44/* current version of this driver-source: */
45#define IBMMCA_SCSI_DRIVER_VERSION "4.0b-ac"
46
47/* driver configuration */
48#define IM_MAX_HOSTS 8 /* maximum number of host adapters */
49#define IM_RESET_DELAY 60 /* seconds allowed for a reset */
50
51/* driver debugging - #undef all for normal operation */
52/* if defined: count interrupts and ignore this special one: */
53#undef IM_DEBUG_TIMEOUT //50
54#define TIMEOUT_PUN 0
55#define TIMEOUT_LUN 0
56/* verbose interrupt: */
57#undef IM_DEBUG_INT
58/* verbose queuecommand: */
59#undef IM_DEBUG_CMD
60/* verbose queucommand for specific SCSI-device type: */
61#undef IM_DEBUG_CMD_SPEC_DEV
62/* verbose device probing */
63#undef IM_DEBUG_PROBE
64
65/* device type that shall be displayed on syslog (only during debugging): */
66#define IM_DEBUG_CMD_DEVICE TYPE_TAPE
67
68/* relative addresses of hardware registers on a subsystem */
69#define IM_CMD_REG(hi) (hosts[(hi)]->io_port) /*Command Interface, (4 bytes long) */
70#define IM_ATTN_REG(hi) (hosts[(hi)]->io_port+4) /*Attention (1 byte) */
71#define IM_CTR_REG(hi) (hosts[(hi)]->io_port+5) /*Basic Control (1 byte) */
72#define IM_INTR_REG(hi) (hosts[(hi)]->io_port+6) /*Interrupt Status (1 byte, r/o) */
73#define IM_STAT_REG(hi) (hosts[(hi)]->io_port+7) /*Basic Status (1 byte, read only) */
74
75/* basic I/O-port of first adapter */
76#define IM_IO_PORT 0x3540
77/* maximum number of hosts that can be found */
78#define IM_N_IO_PORT 8
79
80/*requests going into the upper nibble of the Attention register */
81/*note: the lower nibble specifies the device(0-14), or subsystem(15) */
82#define IM_IMM_CMD 0x10 /*immediate command */
83#define IM_SCB 0x30 /*Subsystem Control Block command */
84#define IM_LONG_SCB 0x40 /*long Subsystem Control Block command */
85#define IM_EOI 0xe0 /*end-of-interrupt request */
86
87/*values for bits 7,1,0 of Basic Control reg. (bits 6-2 reserved) */
88#define IM_HW_RESET 0x80 /*hardware reset */
89#define IM_ENABLE_DMA 0x02 /*enable subsystem's busmaster DMA */
90#define IM_ENABLE_INTR 0x01 /*enable interrupts to the system */
91
92/*to interpret the upper nibble of Interrupt Status register */
93/*note: the lower nibble specifies the device(0-14), or subsystem(15) */
94#define IM_SCB_CMD_COMPLETED 0x10
95#define IM_SCB_CMD_COMPLETED_WITH_RETRIES 0x50
96#define IM_LOOP_SCATTER_BUFFER_FULL 0x60
97#define IM_ADAPTER_HW_FAILURE 0x70
98#define IM_IMMEDIATE_CMD_COMPLETED 0xa0
99#define IM_CMD_COMPLETED_WITH_FAILURE 0xc0
100#define IM_CMD_ERROR 0xe0
101#define IM_SOFTWARE_SEQUENCING_ERROR 0xf0
102
103/*to interpret bits 3-0 of Basic Status register (bits 7-4 reserved) */
104#define IM_CMD_REG_FULL 0x08
105#define IM_CMD_REG_EMPTY 0x04
106#define IM_INTR_REQUEST 0x02
107#define IM_BUSY 0x01
108
109/*immediate commands (word written into low 2 bytes of command reg) */
110#define IM_RESET_IMM_CMD 0x0400
111#define IM_FEATURE_CTR_IMM_CMD 0x040c
112#define IM_DMA_PACING_IMM_CMD 0x040d
113#define IM_ASSIGN_IMM_CMD 0x040e
114#define IM_ABORT_IMM_CMD 0x040f
115#define IM_FORMAT_PREP_IMM_CMD 0x0417
116
117/*SCB (Subsystem Control Block) structure */
118struct 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) */
139struct im_sge {
140 void *address;
141 unsigned long byte_length;
142};
143
144/*structure returned by a get_pos_info command: */
145struct 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 */
198struct 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 */
244static int display_mode = 0;
245/* set default adapter timeout */
246static unsigned int adapter_timeout = 45;
247/* for probing on feature-command: */
248static unsigned int global_command_error_excuse = 0;
249/* global setting by command line for adapter_speed */
250static 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 */
271struct 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 */
288static 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
297of the adapter itself. */
298#define MAX_LOG_DEV 15
299
300/*local data for a logical device */
301struct 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) */
315struct 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 */
337struct 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 */
440static int io_port[IM_MAX_HOSTS] = { 0, 0, 0, 0, 0, 0, 0, 0 };
441static 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)
446static char *boot_options = NULL;
447module_param(boot_options, charp, 0);
448module_param_array(io_port, int, NULL, 0);
449module_param_array(scsi_id, int, NULL, 0);
450
451#if 0 /* FIXME: No longer exist? --RR */
452MODULE_PARM(display, "1i");
453MODULE_PARM(adisplay, "1i");
454MODULE_PARM(normal, "1i");
455MODULE_PARM(ansi, "1i");
456#endif
d39a942c
RD		 457
458MODULE_LICENSE("GPL");
1da177e4
LT		 459#endif
460/*counter of concurrent disk read/writes, to turn on/off disk led */
461static int disk_rw_in_progress = 0;
462
463/* host information */
464static int found = 0;
465static struct Scsi_Host *hosts[IM_MAX_HOSTS + 1] = {
466 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
467};
468static unsigned int pos[8]; /* whole pos register-line for diagnosis */
469/* Taking into account the additions, made by ZP Gu.
470 * This selects now the preset value from the configfile and
471 * offers the 'normal' commandline option to be accepted */
472#ifdef CONFIG_IBMMCA_SCSI_ORDER_STANDARD
473static char ibm_ansi_order = 1;
474#else
475static char ibm_ansi_order = 0;
476#endif
477
478static void issue_cmd(int, unsigned long, unsigned char);
479static void internal_done(Scsi_Cmnd * cmd);
480static void check_devices(int, int);
481static int immediate_assign(int, unsigned int, unsigned int, unsigned int, unsigned int);
482static int immediate_feature(int, unsigned int, unsigned int);
483#ifdef CONFIG_IBMMCA_SCSI_DEV_RESET
484static int immediate_reset(int, unsigned int);
485#endif
486static int device_inquiry(int, int);
487static int read_capacity(int, int);
488static int get_pos_info(int);
489static char *ti_p(int);
490static char *ti_l(int);
491static char *ibmrate(unsigned int, int);
492static int probe_display(int);
493static int probe_bus_mode(int);
494static int device_exists(int, int, int *, int *);
d0be4a7d 495static struct Scsi_Host *ibmmca_register(struct scsi_host_template *, int, int, int, char *);
1da177e4
LT		 496static int option_setup(char *);
497/* local functions needed for proc_info */
498static int ldn_access_load(int, int);
499static int ldn_access_total_read_write(int);
500
501static irqreturn_t interrupt_handler(int irq, void *dev_id,
502 struct pt_regs *regs)
503{
504 int host_index, ihost_index;
505 unsigned int intr_reg;
506 unsigned int cmd_result;
507 unsigned int ldn;
508 Scsi_Cmnd *cmd;
509 int lastSCSI;
510 struct Scsi_Host *dev = dev_id;
511
512 spin_lock(dev->host_lock);
513 /* search for one adapter-response on shared interrupt */
514 for (host_index = 0; hosts[host_index] && !(inb(IM_STAT_REG(host_index)) & IM_INTR_REQUEST); host_index++);
515 /* return if some other device on this IRQ caused the interrupt */
516 if (!hosts[host_index]) {
517 spin_unlock(dev->host_lock);
518 return IRQ_NONE;
519 }
520
521 /* the reset-function already did all the job, even ints got
522 renabled on the subsystem, so just return */
523 if ((reset_status(host_index) == IM_RESET_NOT_IN_PROGRESS_NO_INT) || (reset_status(host_index) == IM_RESET_FINISHED_OK_NO_INT)) {
524 reset_status(host_index) = IM_RESET_NOT_IN_PROGRESS;
525 spin_unlock(dev->host_lock);
526 return IRQ_HANDLED;
527 }
528
529 /*must wait for attention reg not busy, then send EOI to subsystem */
530 while (1) {
531 if (!(inb(IM_STAT_REG(host_index)) & IM_BUSY))
532 break;
533 cpu_relax();
534 }
535 ihost_index = host_index;
536 /*get command result and logical device */
537 intr_reg = (unsigned char) (inb(IM_INTR_REG(ihost_index)));
538 cmd_result = intr_reg & 0xf0;
539 ldn = intr_reg & 0x0f;
540 /* get the last_scsi_command here */
541 lastSCSI = last_scsi_command(ihost_index)[ldn];
542 outb(IM_EOI | ldn, IM_ATTN_REG(ihost_index));
543
544 /*these should never happen (hw fails, or a local programming bug) */
545 if (!global_command_error_excuse) {
546 switch (cmd_result) {
547 /* Prevent from Ooopsing on error to show the real reason */
548 case IM_ADAPTER_HW_FAILURE:
549 case IM_SOFTWARE_SEQUENCING_ERROR:
550 case IM_CMD_ERROR:
551 printk(KERN_ERR "IBM MCA SCSI: Fatal Subsystem ERROR!\n");
552 printk(KERN_ERR " Last cmd=0x%x, ena=%x, len=", lastSCSI, ld(ihost_index)[ldn].scb.enable);
553 if (ld(ihost_index)[ldn].cmd)
554 printk("%ld/%ld,", (long) (ld(ihost_index)[ldn].cmd->request_bufflen), (long) (ld(ihost_index)[ldn].scb.sys_buf_length));
555 else
556 printk("none,");
557 if (ld(ihost_index)[ldn].cmd)
558 printk("Blocksize=%d", ld(ihost_index)[ldn].scb.u2.blk.length);
559 else
560 printk("Blocksize=none");
561 printk(", host=0x%x, ldn=0x%x\n", ihost_index, ldn);
562 if (ld(ihost_index)[ldn].cmd) {
563 printk(KERN_ERR "Blockcount=%d/%d\n", last_scsi_blockcount(ihost_index)[ldn], ld(ihost_index)[ldn].scb.u2.blk.count);
564 printk(KERN_ERR "Logical block=%lx/%lx\n", last_scsi_logical_block(ihost_index)[ldn], ld(ihost_index)[ldn].scb.u1.log_blk_adr);
565 }
566 printk(KERN_ERR "Reason given: %s\n", (cmd_result == IM_ADAPTER_HW_FAILURE) ? "HARDWARE FAILURE" : (cmd_result == IM_SOFTWARE_SEQUENCING_ERROR) ? "SOFTWARE SEQUENCING ERROR" : (cmd_result == IM_CMD_ERROR) ? "COMMAND ERROR" : "UNKNOWN");
567 /* if errors appear, enter this section to give detailed info */
568 printk(KERN_ERR "IBM MCA SCSI: Subsystem Error-Status follows:\n");
569 printk(KERN_ERR " Command Type................: %x\n", last_scsi_type(ihost_index)[ldn]);
570 printk(KERN_ERR " Attention Register..........: %x\n", inb(IM_ATTN_REG(ihost_index)));
571 printk(KERN_ERR " Basic Control Register......: %x\n", inb(IM_CTR_REG(ihost_index)));
572 printk(KERN_ERR " Interrupt Status Register...: %x\n", intr_reg);
573 printk(KERN_ERR " Basic Status Register.......: %x\n", inb(IM_STAT_REG(ihost_index)));
574 if ((last_scsi_type(ihost_index)[ldn] == IM_SCB) || (last_scsi_type(ihost_index)[ldn] == IM_LONG_SCB)) {
575 printk(KERN_ERR " SCB-Command.................: %x\n", ld(ihost_index)[ldn].scb.command);
576 printk(KERN_ERR " SCB-Enable..................: %x\n", ld(ihost_index)[ldn].scb.enable);
577 printk(KERN_ERR " SCB-logical block address...: %lx\n", ld(ihost_index)[ldn].scb.u1.log_blk_adr);
578 printk(KERN_ERR " SCB-system buffer address...: %lx\n", ld(ihost_index)[ldn].scb.sys_buf_adr);
579 printk(KERN_ERR " SCB-system buffer length....: %lx\n", ld(ihost_index)[ldn].scb.sys_buf_length);
580 printk(KERN_ERR " SCB-tsb address.............: %lx\n", ld(ihost_index)[ldn].scb.tsb_adr);
581 printk(KERN_ERR " SCB-Chain address...........: %lx\n", ld(ihost_index)[ldn].scb.scb_chain_adr);
582 printk(KERN_ERR " SCB-block count.............: %x\n", ld(ihost_index)[ldn].scb.u2.blk.count);
583 printk(KERN_ERR " SCB-block length............: %x\n", ld(ihost_index)[ldn].scb.u2.blk.length);
584 }
585 printk(KERN_ERR " Send this report to the maintainer.\n");
586 panic("IBM MCA SCSI: Fatal error message from the subsystem (0x%X,0x%X)!\n", lastSCSI, cmd_result);
587 break;
588 }
589 } else {
590 /* The command error handling is made silent, but we tell the
591 * calling function, that there is a reported error from the
592 * adapter. */
593 switch (cmd_result) {
594 case IM_ADAPTER_HW_FAILURE:
595 case IM_SOFTWARE_SEQUENCING_ERROR:
596 case IM_CMD_ERROR:
597 global_command_error_excuse = CMD_FAIL;
598 break;
599 default:
600 global_command_error_excuse = 0;
601 break;
602 }
603 }
604 /* if no panic appeared, increase the interrupt-counter */
605 IBM_DS(ihost_index).total_interrupts++;
606 /*only for local checking phase */
607 if (local_checking_phase_flag(ihost_index)) {
608 stat_result(ihost_index) = cmd_result;
609 got_interrupt(ihost_index) = 1;
610 reset_status(ihost_index) = IM_RESET_FINISHED_OK;
611 last_scsi_command(ihost_index)[ldn] = NO_SCSI;
612 spin_unlock(dev->host_lock);
613 return IRQ_HANDLED;
614 }
615 /* handling of commands coming from upper level of scsi driver */
616 if (last_scsi_type(ihost_index)[ldn] == IM_IMM_CMD) {
617 /* verify ldn, and may handle rare reset immediate command */
618 if ((reset_status(ihost_index) == IM_RESET_IN_PROGRESS) && (last_scsi_command(ihost_index)[ldn] == IM_RESET_IMM_CMD)) {
619 if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE) {
620 disk_rw_in_progress = 0;
621 PS2_DISK_LED_OFF();
622 reset_status(ihost_index) = IM_RESET_FINISHED_FAIL;
623 } else {
624 /*reset disk led counter, turn off disk led */
625 disk_rw_in_progress = 0;
626 PS2_DISK_LED_OFF();
627 reset_status(ihost_index) = IM_RESET_FINISHED_OK;
628 }
629 stat_result(ihost_index) = cmd_result;
630 last_scsi_command(ihost_index)[ldn] = NO_SCSI;
631 last_scsi_type(ihost_index)[ldn] = 0;
632 spin_unlock(dev->host_lock);
633 return IRQ_HANDLED;
634 } else if (last_scsi_command(ihost_index)[ldn] == IM_ABORT_IMM_CMD) {
635 /* react on SCSI abort command */
636#ifdef IM_DEBUG_PROBE
637 printk("IBM MCA SCSI: Interrupt from SCSI-abort.\n");
638#endif
639 disk_rw_in_progress = 0;
640 PS2_DISK_LED_OFF();
641 cmd = ld(ihost_index)[ldn].cmd;
642 ld(ihost_index)[ldn].cmd = NULL;
643 if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE)
644 cmd->result = DID_NO_CONNECT << 16;
645 else
646 cmd->result = DID_ABORT << 16;
647 stat_result(ihost_index) = cmd_result;
648 last_scsi_command(ihost_index)[ldn] = NO_SCSI;
649 last_scsi_type(ihost_index)[ldn] = 0;
650 if (cmd->scsi_done)
651 (cmd->scsi_done) (cmd); /* should be the internal_done */
652 spin_unlock(dev->host_lock);
653 return IRQ_HANDLED;
654 } else {
655 disk_rw_in_progress = 0;
656 PS2_DISK_LED_OFF();
657 reset_status(ihost_index) = IM_RESET_FINISHED_OK;
658 stat_result(ihost_index) = cmd_result;
659 last_scsi_command(ihost_index)[ldn] = NO_SCSI;
660 spin_unlock(dev->host_lock);
661 return IRQ_HANDLED;
662 }
663 }
664 last_scsi_command(ihost_index)[ldn] = NO_SCSI;
665 last_scsi_type(ihost_index)[ldn] = 0;
666 cmd = ld(ihost_index)[ldn].cmd;
667 ld(ihost_index)[ldn].cmd = NULL;
668#ifdef IM_DEBUG_TIMEOUT
669 if (cmd) {
670 if ((cmd->target == TIMEOUT_PUN) && (cmd->device->lun == TIMEOUT_LUN)) {
671 printk("IBM MCA SCSI: Ignoring interrupt from pun=%x, lun=%x.\n", cmd->target, cmd->device->lun);
672 return IRQ_HANDLED;
673 }
674 }
675#endif
676 /*if no command structure, just return, else clear cmd */
677 if (!cmd)
678 {
679 spin_unlock(dev->host_lock);
680 return IRQ_HANDLED;
681 }
682
683#ifdef IM_DEBUG_INT
684 printk("cmd=%02x ireg=%02x ds=%02x cs=%02x de=%02x ce=%02x\n", cmd->cmnd[0], intr_reg, ld(ihost_index)[ldn].tsb.dev_status, ld(ihost_index)[ldn].tsb.cmd_status, ld(ihost_index)[ldn].tsb.dev_error, ld(ihost_index)[ldn].tsb.cmd_error);
685#endif
686 /*if this is end of media read/write, may turn off PS/2 disk led */
687 if ((ld(ihost_index)[ldn].device_type != TYPE_NO_LUN) && (ld(ihost_index)[ldn].device_type != TYPE_NO_DEVICE)) {
688 /* only access this, if there was a valid device addressed */
689 if (--disk_rw_in_progress == 0)
690 PS2_DISK_LED_OFF();
691 }
692
693 /* IBM describes the status-mask to be 0x1e, but this is not conform
694 * with SCSI-definition, I suppose, the reason for it is that IBM
695 * adapters do not support CMD_TERMINATED, TASK_SET_FULL and
696 * ACA_ACTIVE as returning statusbyte information. (ML) */
697 if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE) {
698 cmd->result = (unsigned char) (ld(ihost_index)[ldn].tsb.dev_status & 0x1e);
699 IBM_DS(ihost_index).total_errors++;
700 } else
701 cmd->result = 0;
702 /* write device status into cmd->result, and call done function */
703 if (lastSCSI == NO_SCSI) { /* unexpected interrupt :-( */
704 cmd->result |= DID_BAD_INTR << 16;
705 printk("IBM MCA SCSI: WARNING - Interrupt from non-pending SCSI-command!\n");
706 } else /* things went right :-) */
707 cmd->result |= DID_OK << 16;
708 if (cmd->scsi_done)
709 (cmd->scsi_done) (cmd);
710 spin_unlock(dev->host_lock);
711 return IRQ_HANDLED;
712}
713
714static void issue_cmd(int host_index, unsigned long cmd_reg, unsigned char attn_reg)
715{
716 unsigned long flags;
717 /* must wait for attention reg not busy */
718 while (1) {
719 spin_lock_irqsave(hosts[host_index]->host_lock, flags);
720 if (!(inb(IM_STAT_REG(host_index)) & IM_BUSY))
721 break;
722 spin_unlock_irqrestore(hosts[host_index]->host_lock, flags);
723 }
724 /* write registers and enable system interrupts */
725 outl(cmd_reg, IM_CMD_REG(host_index));
726 outb(attn_reg, IM_ATTN_REG(host_index));
727 spin_unlock_irqrestore(hosts[host_index]->host_lock, flags);
728}
729
730static void internal_done(Scsi_Cmnd * cmd)
731{
732 cmd->SCp.Status++;
733 return;
734}
735
736/* SCSI-SCB-command for device_inquiry */
737static int device_inquiry(int host_index, int ldn)
738{
739 int retr;
740 struct im_scb *scb;
741 struct im_tsb *tsb;
742 unsigned char *buf;
743
744 scb = &(ld(host_index)[ldn].scb);
745 tsb = &(ld(host_index)[ldn].tsb);
746 buf = (unsigned char *) (&(ld(host_index)[ldn].buf));
747 ld(host_index)[ldn].tsb.dev_status = 0; /* prepare statusblock */
748 for (retr = 0; retr < 3; retr++) {
749 /* fill scb with inquiry command */
750 scb->command = IM_DEVICE_INQUIRY_CMD | IM_NO_DISCONNECT;
751 scb->enable = IM_REPORT_TSB_ONLY_ON_ERROR | IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_RETRY_ENABLE | IM_BYPASS_BUFFER;
752 last_scsi_command(host_index)[ldn] = IM_DEVICE_INQUIRY_CMD;
753 last_scsi_type(host_index)[ldn] = IM_SCB;
754 scb->sys_buf_adr = isa_virt_to_bus(buf);
755 scb->sys_buf_length = 255; /* maximum bufferlength gives max info */
756 scb->tsb_adr = isa_virt_to_bus(tsb);
757 /* issue scb to passed ldn, and busy wait for interrupt */
758 got_interrupt(host_index) = 0;
759 issue_cmd(host_index, isa_virt_to_bus(scb), IM_SCB | ldn);
760 while (!got_interrupt(host_index))
761 barrier();
762
763 /*if command succesful, break */
764 if ((stat_result(host_index) == IM_SCB_CMD_COMPLETED) || (stat_result(host_index) == IM_SCB_CMD_COMPLETED_WITH_RETRIES))
765 return 1;
766 }
767 /*if all three retries failed, return "no device at this ldn" */
768 if (retr >= 3)
769 return 0;
770 else
771 return 1;
772}
773
774static int read_capacity(int host_index, int ldn)
775{
776 int retr;
777 struct im_scb *scb;
778 struct im_tsb *tsb;
779 unsigned char *buf;
780
781 scb = &(ld(host_index)[ldn].scb);
782 tsb = &(ld(host_index)[ldn].tsb);
783 buf = (unsigned char *) (&(ld(host_index)[ldn].buf));
784 ld(host_index)[ldn].tsb.dev_status = 0;
785 for (retr = 0; retr < 3; retr++) {
786 /*fill scb with read capacity command */
787 scb->command = IM_READ_CAPACITY_CMD;
788 scb->enable = IM_REPORT_TSB_ONLY_ON_ERROR | IM_READ_CONTROL | IM_RETRY_ENABLE | IM_BYPASS_BUFFER;
789 last_scsi_command(host_index)[ldn] = IM_READ_CAPACITY_CMD;
790 last_scsi_type(host_index)[ldn] = IM_SCB;
791 scb->sys_buf_adr = isa_virt_to_bus(buf);
792 scb->sys_buf_length = 8;
793 scb->tsb_adr = isa_virt_to_bus(tsb);
794 /*issue scb to passed ldn, and busy wait for interrupt */
795 got_interrupt(host_index) = 0;
796 issue_cmd(host_index, isa_virt_to_bus(scb), IM_SCB | ldn);
797 while (!got_interrupt(host_index))
798 barrier();
799
800 /*if got capacity, get block length and return one device found */
801 if ((stat_result(host_index) == IM_SCB_CMD_COMPLETED) || (stat_result(host_index) == IM_SCB_CMD_COMPLETED_WITH_RETRIES))
802 return 1;
803 }
804 /*if all three retries failed, return "no device at this ldn" */
805 if (retr >= 3)
806 return 0;
807 else
808 return 1;
809}
810
811static int get_pos_info(int host_index)
812{
813 int retr;
814 struct im_scb *scb;
815 struct im_tsb *tsb;
816 unsigned char *buf;
817
818 scb = &(ld(host_index)[MAX_LOG_DEV].scb);
819 tsb = &(ld(host_index)[MAX_LOG_DEV].tsb);
820 buf = (unsigned char *) (&(ld(host_index)[MAX_LOG_DEV].buf));
821 ld(host_index)[MAX_LOG_DEV].tsb.dev_status = 0;
822 for (retr = 0; retr < 3; retr++) {
823 /*fill scb with get_pos_info command */
824 scb->command = IM_GET_POS_INFO_CMD;
825 scb->enable = IM_READ_CONTROL | IM_REPORT_TSB_ONLY_ON_ERROR | IM_RETRY_ENABLE | IM_BYPASS_BUFFER;
826 last_scsi_command(host_index)[MAX_LOG_DEV] = IM_GET_POS_INFO_CMD;
827 last_scsi_type(host_index)[MAX_LOG_DEV] = IM_SCB;
828 scb->sys_buf_adr = isa_virt_to_bus(buf);
829 if (special(host_index) == IBM_SCSI2_FW)
830 scb->sys_buf_length = 256; /* get all info from F/W adapter */
831 else
832 scb->sys_buf_length = 18; /* get exactly 18 bytes for other SCSI */
833 scb->tsb_adr = isa_virt_to_bus(tsb);
834 /*issue scb to ldn=15, and busy wait for interrupt */
835 got_interrupt(host_index) = 0;
836 issue_cmd(host_index, isa_virt_to_bus(scb), IM_SCB | MAX_LOG_DEV);
837
838 /* FIXME: timeout */
839 while (!got_interrupt(host_index))
840 barrier();
841
842 /*if got POS-stuff, get block length and return one device found */
843 if ((stat_result(host_index) == IM_SCB_CMD_COMPLETED) || (stat_result(host_index) == IM_SCB_CMD_COMPLETED_WITH_RETRIES))
844 return 1;
845 }
846 /* if all three retries failed, return "no device at this ldn" */
847 if (retr >= 3)
848 return 0;
849 else
850 return 1;
851}
852
853/* SCSI-immediate-command for assign. This functions maps/unmaps specific
854 ldn-numbers on SCSI (PUN,LUN). It is needed for presetting of the
855 subsystem and for dynamical remapping od ldns. */
856static int immediate_assign(int host_index, unsigned int pun, unsigned int lun, unsigned int ldn, unsigned int operation)
857{
858 int retr;
859 unsigned long imm_cmd;
860
861 for (retr = 0; retr < 3; retr++) {
862 /* select mutation level of the SCSI-adapter */
863 switch (special(host_index)) {
864 case IBM_SCSI2_FW:
865 imm_cmd = (unsigned long) (IM_ASSIGN_IMM_CMD);
866 imm_cmd |= (unsigned long) ((lun & 7) << 24);
867 imm_cmd |= (unsigned long) ((operation & 1) << 23);
868 imm_cmd |= (unsigned long) ((pun & 7) << 20) | ((pun & 8) << 24);
869 imm_cmd |= (unsigned long) ((ldn & 15) << 16);
870 break;
871 default:
872 imm_cmd = inl(IM_CMD_REG(host_index));
873 imm_cmd &= (unsigned long) (0xF8000000); /* keep reserved bits */
874 imm_cmd |= (unsigned long) (IM_ASSIGN_IMM_CMD);
875 imm_cmd |= (unsigned long) ((lun & 7) << 24);
876 imm_cmd |= (unsigned long) ((operation & 1) << 23);
877 imm_cmd |= (unsigned long) ((pun & 7) << 20);
878 imm_cmd |= (unsigned long) ((ldn & 15) << 16);
879 break;
880 }
881 last_scsi_command(host_index)[MAX_LOG_DEV] = IM_ASSIGN_IMM_CMD;
882 last_scsi_type(host_index)[MAX_LOG_DEV] = IM_IMM_CMD;
883 got_interrupt(host_index) = 0;
884 issue_cmd(host_index, (unsigned long) (imm_cmd), IM_IMM_CMD | MAX_LOG_DEV);
885 while (!got_interrupt(host_index))
886 barrier();
887
888 /*if command succesful, break */
889 if (stat_result(host_index) == IM_IMMEDIATE_CMD_COMPLETED)
890 return 1;
891 }
892 if (retr >= 3)
893 return 0;
894 else
895 return 1;
896}
897
898static int immediate_feature(int host_index, unsigned int speed, unsigned int timeout)
899{
900 int retr;
901 unsigned long imm_cmd;
902
903 for (retr = 0; retr < 3; retr++) {
904 /* select mutation level of the SCSI-adapter */
905 imm_cmd = IM_FEATURE_CTR_IMM_CMD;
906 imm_cmd |= (unsigned long) ((speed & 0x7) << 29);
907 imm_cmd |= (unsigned long) ((timeout & 0x1fff) << 16);
908 last_scsi_command(host_index)[MAX_LOG_DEV] = IM_FEATURE_CTR_IMM_CMD;
909 last_scsi_type(host_index)[MAX_LOG_DEV] = IM_IMM_CMD;
910 got_interrupt(host_index) = 0;
911 /* we need to run into command errors in order to probe for the
912 * right speed! */
913 global_command_error_excuse = 1;
914 issue_cmd(host_index, (unsigned long) (imm_cmd), IM_IMM_CMD | MAX_LOG_DEV);
915
916 /* FIXME: timeout */
917 while (!got_interrupt(host_index))
918 barrier();
919 if (global_command_error_excuse == CMD_FAIL) {
920 global_command_error_excuse = 0;
921 return 2;
922 } else
923 global_command_error_excuse = 0;
924 /*if command succesful, break */
925 if (stat_result(host_index) == IM_IMMEDIATE_CMD_COMPLETED)
926 return 1;
927 }
928 if (retr >= 3)
929 return 0;
930 else
931 return 1;
932}
933
934#ifdef CONFIG_IBMMCA_SCSI_DEV_RESET
935static int immediate_reset(int host_index, unsigned int ldn)
936{
937 int retries;
938 int ticks;
939 unsigned long imm_command;
940
941 for (retries = 0; retries < 3; retries++) {
942 imm_command = inl(IM_CMD_REG(host_index));
943 imm_command &= (unsigned long) (0xFFFF0000); /* keep reserved bits */
944 imm_command |= (unsigned long) (IM_RESET_IMM_CMD);
945 last_scsi_command(host_index)[ldn] = IM_RESET_IMM_CMD;
946 last_scsi_type(host_index)[ldn] = IM_IMM_CMD;
947 got_interrupt(host_index) = 0;
948 reset_status(host_index) = IM_RESET_IN_PROGRESS;
949 issue_cmd(host_index, (unsigned long) (imm_command), IM_IMM_CMD | ldn);
950 ticks = IM_RESET_DELAY * HZ;
951 while (reset_status(host_index) == IM_RESET_IN_PROGRESS && --ticks) {
952 udelay((1 + 999 / HZ) * 1000);
953 barrier();
954 }
955 /* if reset did not complete, just complain */
956 if (!ticks) {
957 printk(KERN_ERR "IBM MCA SCSI: reset did not complete within %d seconds.\n", IM_RESET_DELAY);
958 reset_status(host_index) = IM_RESET_FINISHED_OK;
959 /* did not work, finish */
960 return 1;
961 }
962 /*if command succesful, break */
963 if (stat_result(host_index) == IM_IMMEDIATE_CMD_COMPLETED)
964 return 1;
965 }
966 if (retries >= 3)
967 return 0;
968 else
969 return 1;
970}
971#endif
972
973/* type-interpreter for physical device numbers */
974static char *ti_p(int dev)
975{
976 switch (dev) {
977 case TYPE_IBM_SCSI_ADAPTER:
978 return ("A");
979 case TYPE_DISK:
980 return ("D");
981 case TYPE_TAPE:
982 return ("T");
983 case TYPE_PROCESSOR:
984 return ("P");
985 case TYPE_WORM:
986 return ("W");
987 case TYPE_ROM:
988 return ("R");
989 case TYPE_SCANNER:
990 return ("S");
991 case TYPE_MOD:
992 return ("M");
993 case TYPE_MEDIUM_CHANGER:
994 return ("C");
995 case TYPE_NO_LUN:
996 return ("+"); /* show NO_LUN */
997 }
998 return ("-"); /* TYPE_NO_DEVICE and others */
999}
1000
1001/* interpreter for logical device numbers (ldn) */
1002static char *ti_l(int val)
1003{
1004 const char hex[16] = "0123456789abcdef";
1005 static char answer[2];
1006
1007 answer[1] = (char) (0x0);
1008 if (val <= MAX_LOG_DEV)
1009 answer[0] = hex[val];
1010 else
1011 answer[0] = '-';
1012 return (char *) &answer;
1013}
1014
1015/* transfers bitpattern of the feature command to values in MHz */
1016static char *ibmrate(unsigned int speed, int i)
1017{
1018 switch (speed) {
1019 case 0:
1020 return i ? "5.00" : "10.00";
1021 case 1:
1022 return i ? "4.00" : "8.00";
1023 case 2:
1024 return i ? "3.33" : "6.66";
1025 case 3:
1026 return i ? "2.86" : "5.00";
1027 case 4:
1028 return i ? "2.50" : "4.00";
1029 case 5:
1030 return i ? "2.22" : "3.10";
1031 case 6:
1032 return i ? "2.00" : "2.50";
1033 case 7:
1034 return i ? "1.82" : "2.00";
1035 }
1036 return "---";
1037}
1038
1039static int probe_display(int what)
1040{
1041 static int rotator = 0;
1042 const char rotor[] = "|/-\\";
1043
1044 if (!(display_mode & LED_DISP))
1045 return 0;
1046 if (!what) {
1047 outl(0x20202020, MOD95_LED_PORT);
1048 outl(0x20202020, MOD95_LED_PORT + 4);
1049 } else {
1050 outb('S', MOD95_LED_PORT + 7);
1051 outb('C', MOD95_LED_PORT + 6);
1052 outb('S', MOD95_LED_PORT + 5);
1053 outb('I', MOD95_LED_PORT + 4);
1054 outb('i', MOD95_LED_PORT + 3);
1055 outb('n', MOD95_LED_PORT + 2);
1056 outb('i', MOD95_LED_PORT + 1);
1057 outb((char) (rotor[rotator]), MOD95_LED_PORT);
1058 rotator++;
1059 if (rotator > 3)
1060 rotator = 0;
1061 }
1062 return 0;
1063}
1064
1065static int probe_bus_mode(int host_index)
1066{
1067 struct im_pos_info *info;
1068 int num_bus = 0;
1069 int ldn;
1070
1071 info = (struct im_pos_info *) (&(ld(host_index)[MAX_LOG_DEV].buf));
1072 if (get_pos_info(host_index)) {
1073 if (info->connector_size & 0xf000)
1074 subsystem_connector_size(host_index) = 16;
1075 else
1076 subsystem_connector_size(host_index) = 32;
1077 num_bus |= (info->pos_4b & 8) >> 3;
1078 for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) {
1079 if ((special(host_index) == IBM_SCSI_WCACHE) || (special(host_index) == IBM_7568_WCACHE)) {
1080 if (!((info->cache_stat >> ldn) & 1))
1081 ld(host_index)[ldn].cache_flag = 0;
1082 }
1083 if (!((info->retry_stat >> ldn) & 1))
1084 ld(host_index)[ldn].retry_flag = 0;
1085 }
1086#ifdef IM_DEBUG_PROBE
1087 printk("IBM MCA SCSI: SCSI-Cache bits: ");
1088 for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) {
1089 printk("%d", ld(host_index)[ldn].cache_flag);
1090 }
1091 printk("\nIBM MCA SCSI: SCSI-Retry bits: ");
1092 for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) {
1093 printk("%d", ld(host_index)[ldn].retry_flag);
1094 }
1095 printk("\n");
1096#endif
1097 }
1098 return num_bus;
1099}
1100
1101/* probing scsi devices */
1102static void check_devices(int host_index, int adaptertype)
1103{
1104 int id, lun, ldn, ticks;
1105 int count_devices; /* local counter for connected device */
1106 int max_pun;
1107 int num_bus;
1108 int speedrun; /* local adapter_speed check variable */
1109
1110 /* assign default values to certain variables */
1111 ticks = 0;
1112 count_devices = 0;
1113 IBM_DS(host_index).dyn_flag = 0; /* normally no need for dynamical ldn management */
1114 IBM_DS(host_index).total_errors = 0; /* set errorcounter to 0 */
1115 next_ldn(host_index) = 7; /* next ldn to be assigned is 7, because 0-6 is 'hardwired' */
1116
1117 /* initialize the very important driver-informational arrays/structs */
1118 memset(ld(host_index), 0, sizeof(ld(host_index)));
1119 for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) {
1120 last_scsi_command(host_index)[ldn] = NO_SCSI; /* emptify last SCSI-command storage */
1121 last_scsi_type(host_index)[ldn] = 0;
1122 ld(host_index)[ldn].cache_flag = 1;
1123 ld(host_index)[ldn].retry_flag = 1;
1124 }
1125 memset(get_ldn(host_index), TYPE_NO_DEVICE, sizeof(get_ldn(host_index))); /* this is essential ! */
1126 memset(get_scsi(host_index), TYPE_NO_DEVICE, sizeof(get_scsi(host_index))); /* this is essential ! */
1127 for (lun = 0; lun < 8; lun++) {
1128 /* mark the adapter at its pun on all luns */
1129 get_scsi(host_index)[subsystem_pun(host_index)][lun] = TYPE_IBM_SCSI_ADAPTER;
1130 get_ldn(host_index)[subsystem_pun(host_index)][lun] = MAX_LOG_DEV; /* make sure, the subsystem
1131 ldn is active for all
1132 luns. */
1133 }
1134 probe_display(0); /* Supercool display usage during SCSI-probing. */
1135 /* This makes sense, when booting without any */
1136 /* monitor connected on model XX95. */
1137
1138 /* STEP 1: */
1139 adapter_speed(host_index) = global_adapter_speed;
1140 speedrun = adapter_speed(host_index);
1141 while (immediate_feature(host_index, speedrun, adapter_timeout) == 2) {
1142 probe_display(1);
1143 if (speedrun == 7)
1144 panic("IBM MCA SCSI: Cannot set Synchronous-Transfer-Rate!\n");
1145 speedrun++;
1146 if (speedrun > 7)
1147 speedrun = 7;
1148 }
1149 adapter_speed(host_index) = speedrun;
1150 /* Get detailed information about the current adapter, necessary for
1151 * device operations: */
1152 num_bus = probe_bus_mode(host_index);
1153
1154 /* num_bus contains only valid data for the F/W adapter! */
1155 if (adaptertype == IBM_SCSI2_FW) { /* F/W SCSI adapter: */
1156 /* F/W adapter PUN-space extension evaluation: */
1157 if (num_bus) {
1158 printk(KERN_INFO "IBM MCA SCSI: Separate bus mode (wide-addressing enabled)\n");
1159 subsystem_maxid(host_index) = 16;
1160 } else {
1161 printk(KERN_INFO "IBM MCA SCSI: Combined bus mode (wide-addressing disabled)\n");
1162 subsystem_maxid(host_index) = 8;
1163 }
1164 printk(KERN_INFO "IBM MCA SCSI: Sync.-Rate (F/W: 20, Int.: 10, Ext.: %s) MBytes/s\n", ibmrate(speedrun, adaptertype));
1165 } else /* all other IBM SCSI adapters: */
1166 printk(KERN_INFO "IBM MCA SCSI: Synchronous-SCSI-Transfer-Rate: %s MBytes/s\n", ibmrate(speedrun, adaptertype));
1167
1168 /* assign correct PUN device space */
1169 max_pun = subsystem_maxid(host_index);
1170
1171#ifdef IM_DEBUG_PROBE
1172 printk("IBM MCA SCSI: Current SCSI-host index: %d\n", host_index);
1173 printk("IBM MCA SCSI: Removing default logical SCSI-device mapping.");
1174#else
1175 printk(KERN_INFO "IBM MCA SCSI: Dev. Order: %s, Mapping (takes <2min): ", (ibm_ansi_order) ? "ANSI" : "New");
1176#endif
1177 for (ldn = 0; ldn < MAX_LOG_DEV; ldn++) {
1178 probe_display(1);
1179#ifdef IM_DEBUG_PROBE
1180 printk(".");
1181#endif
1182 immediate_assign(host_index, 0, 0, ldn, REMOVE_LDN); /* remove ldn (wherever) */
1183 }
1184 lun = 0; /* default lun is 0 */
1185#ifndef IM_DEBUG_PROBE
1186 printk("cleared,");
1187#endif
1188 /* STEP 2: */
1189#ifdef IM_DEBUG_PROBE
1190 printk("\nIBM MCA SCSI: Scanning SCSI-devices.");
1191#endif
1192 for (id = 0; id < max_pun; id++)
1193#ifdef CONFIG_SCSI_MULTI_LUN
1194 for (lun = 0; lun < 8; lun++)
1195#endif
1196 {
1197 probe_display(1);
1198#ifdef IM_DEBUG_PROBE
1199 printk(".");
1200#endif
1201 if (id != subsystem_pun(host_index)) {
1202 /* if pun is not the adapter: */
1203 /* set ldn=0 to pun,lun */
1204 immediate_assign(host_index, id, lun, PROBE_LDN, SET_LDN);
1205 if (device_inquiry(host_index, PROBE_LDN)) { /* probe device */
1206 get_scsi(host_index)[id][lun] = (unsigned char) (ld(host_index)[PROBE_LDN].buf[0]);
1207 /* entry, even for NO_LUN */
1208 if (ld(host_index)[PROBE_LDN].buf[0] != TYPE_NO_LUN)
1209 count_devices++; /* a existing device is found */
1210 }
1211 /* remove ldn */
1212 immediate_assign(host_index, id, lun, PROBE_LDN, REMOVE_LDN);
1213 }
1214 }
1215#ifndef IM_DEBUG_PROBE
1216 printk("scanned,");
1217#endif
1218 /* STEP 3: */
1219#ifdef IM_DEBUG_PROBE
1220 printk("\nIBM MCA SCSI: Mapping SCSI-devices.");
1221#endif
1222 ldn = 0;
1223 lun = 0;
1224#ifdef CONFIG_SCSI_MULTI_LUN
1225 for (lun = 0; lun < 8 && ldn < MAX_LOG_DEV; lun++)
1226#endif
1227 for (id = 0; id < max_pun && ldn < MAX_LOG_DEV; id++) {
1228 probe_display(1);
1229#ifdef IM_DEBUG_PROBE
1230 printk(".");
1231#endif
1232 if (id != subsystem_pun(host_index)) {
1233 if (get_scsi(host_index)[id][lun] != TYPE_NO_LUN && get_scsi(host_index)[id][lun] != TYPE_NO_DEVICE) {
1234 /* Only map if accepted type. Always enter for
1235 lun == 0 to get no gaps into ldn-mapping for ldn<7. */
1236 immediate_assign(host_index, id, lun, ldn, SET_LDN);
1237 get_ldn(host_index)[id][lun] = ldn; /* map ldn */
1238 if (device_exists(host_index, ldn, &ld(host_index)[ldn].block_length, &ld(host_index)[ldn].device_type)) {
1239#ifdef CONFIG_IBMMCA_SCSI_DEV_RESET
1240 printk("resetting device at ldn=%x ... ", ldn);
1241 immediate_reset(host_index, ldn);
1242#endif
1243 ldn++;
1244 } else {
1245 /* device vanished, probably because we don't know how to
1246 * handle it or because it has problems */
1247 if (lun > 0) {
1248 /* remove mapping */
1249 get_ldn(host_index)[id][lun] = TYPE_NO_DEVICE;
1250 immediate_assign(host_index, 0, 0, ldn, REMOVE_LDN);
1251 } else
1252 ldn++;
1253 }
1254 } else if (lun == 0) {
1255 /* map lun == 0, even if no device exists */
1256 immediate_assign(host_index, id, lun, ldn, SET_LDN);
1257 get_ldn(host_index)[id][lun] = ldn; /* map ldn */
1258 ldn++;
1259 }
1260 }
1261 }
1262 /* STEP 4: */
1263
1264 /* map remaining ldns to non-existing devices */
1265 for (lun = 1; lun < 8 && ldn < MAX_LOG_DEV; lun++)
1266 for (id = 0; id < max_pun && ldn < MAX_LOG_DEV; id++) {
1267 if (get_scsi(host_index)[id][lun] == TYPE_NO_LUN || get_scsi(host_index)[id][lun] == TYPE_NO_DEVICE) {
1268 probe_display(1);
1269 /* Map remaining ldns only to NON-existing pun,lun
1270 combinations to make sure an inquiry will fail.
1271 For MULTI_LUN, it is needed to avoid adapter autonome
1272 SCSI-remapping. */
1273 immediate_assign(host_index, id, lun, ldn, SET_LDN);
1274 get_ldn(host_index)[id][lun] = ldn;
1275 ldn++;
1276 }
1277 }
1278#ifndef IM_DEBUG_PROBE
1279 printk("mapped.");
1280#endif
1281 printk("\n");
1282#ifdef IM_DEBUG_PROBE
1283 if (ibm_ansi_order)
1284 printk("IBM MCA SCSI: Device order: IBM/ANSI (pun=7 is first).\n");
1285 else
1286 printk("IBM MCA SCSI: Device order: New Industry Standard (pun=0 is first).\n");
1287#endif
1288
1289#ifdef IM_DEBUG_PROBE
1290 /* Show the physical and logical mapping during boot. */
1291 printk("IBM MCA SCSI: Determined SCSI-device-mapping:\n");
1292 printk(" Physical SCSI-Device Map Logical SCSI-Device Map\n");
1293 printk("ID\\LUN 0 1 2 3 4 5 6 7 ID\\LUN 0 1 2 3 4 5 6 7\n");
1294 for (id = 0; id < max_pun; id++) {
1295 printk("%2d ", id);
1296 for (lun = 0; lun < 8; lun++)
1297 printk("%2s ", ti_p(get_scsi(host_index)[id][lun]));
1298 printk(" %2d ", id);
1299 for (lun = 0; lun < 8; lun++)
1300 printk("%2s ", ti_l(get_ldn(host_index)[id][lun]));
1301 printk("\n");
1302 }
1303#endif
1304
1305 /* assign total number of found SCSI-devices to the statistics struct */
1306 IBM_DS(host_index).total_scsi_devices = count_devices;
1307
1308 /* decide for output in /proc-filesystem, if the configuration of
1309 SCSI-devices makes dynamical reassignment of devices necessary */
1310 if (count_devices >= MAX_LOG_DEV)
1311 IBM_DS(host_index).dyn_flag = 1; /* dynamical assignment is necessary */
1312 else
1313 IBM_DS(host_index).dyn_flag = 0; /* dynamical assignment is not necessary */
1314
1315 /* If no SCSI-devices are assigned, return 1 in order to cause message. */
1316 if (ldn == 0)
1317 printk("IBM MCA SCSI: Warning: No SCSI-devices found/assigned!\n");
1318
1319 /* reset the counters for statistics on the current adapter */
1320 IBM_DS(host_index).scbs = 0;
1321 IBM_DS(host_index).long_scbs = 0;
1322 IBM_DS(host_index).total_accesses = 0;
1323 IBM_DS(host_index).total_interrupts = 0;
1324 IBM_DS(host_index).dynamical_assignments = 0;
1325 memset(IBM_DS(host_index).ldn_access, 0x0, sizeof(IBM_DS(host_index).ldn_access));
1326 memset(IBM_DS(host_index).ldn_read_access, 0x0, sizeof(IBM_DS(host_index).ldn_read_access));
1327 memset(IBM_DS(host_index).ldn_write_access, 0x0, sizeof(IBM_DS(host_index).ldn_write_access));
1328 memset(IBM_DS(host_index).ldn_inquiry_access, 0x0, sizeof(IBM_DS(host_index).ldn_inquiry_access));
1329 memset(IBM_DS(host_index).ldn_modeselect_access, 0x0, sizeof(IBM_DS(host_index).ldn_modeselect_access));
1330 memset(IBM_DS(host_index).ldn_assignments, 0x0, sizeof(IBM_DS(host_index).ldn_assignments));
1331 probe_display(0);
1332 return;
1333}
1334
1335static int device_exists(int host_index, int ldn, int *block_length, int *device_type)
1336{
1337 unsigned char *buf;
1338 /* if no valid device found, return immediately with 0 */
1339 if (!(device_inquiry(host_index, ldn)))
1340 return 0;
1341 buf = (unsigned char *) (&(ld(host_index)[ldn].buf));
1342 if (*buf == TYPE_ROM) {
1343 *device_type = TYPE_ROM;
1344 *block_length = 2048; /* (standard blocksize for yellow-/red-book) */
1345 return 1;
1346 }
1347 if (*buf == TYPE_WORM) {
1348 *device_type = TYPE_WORM;
1349 *block_length = 2048;
1350 return 1;
1351 }
1352 if (*buf == TYPE_DISK) {
1353 *device_type = TYPE_DISK;
1354 if (read_capacity(host_index, ldn)) {
1355 *block_length = *(buf + 7) + (*(buf + 6) << 8) + (*(buf + 5) << 16) + (*(buf + 4) << 24);
1356 return 1;
1357 } else
1358 return 0;
1359 }
1360 if (*buf == TYPE_MOD) {
1361 *device_type = TYPE_MOD;
1362 if (read_capacity(host_index, ldn)) {
1363 *block_length = *(buf + 7) + (*(buf + 6) << 8) + (*(buf + 5) << 16) + (*(buf + 4) << 24);
1364 return 1;
1365 } else
1366 return 0;
1367 }
1368 if (*buf == TYPE_TAPE) {
1369 *device_type = TYPE_TAPE;
1370 *block_length = 0; /* not in use (setting by mt and mtst in op.) */
1371 return 1;
1372 }
1373 if (*buf == TYPE_PROCESSOR) {
1374 *device_type = TYPE_PROCESSOR;
1375 *block_length = 0; /* they set their stuff on drivers */
1376 return 1;
1377 }
1378 if (*buf == TYPE_SCANNER) {
1379 *device_type = TYPE_SCANNER;
1380 *block_length = 0; /* they set their stuff on drivers */
1381 return 1;
1382 }
1383 if (*buf == TYPE_MEDIUM_CHANGER) {
1384 *device_type = TYPE_MEDIUM_CHANGER;
1385 *block_length = 0; /* One never knows, what to expect on a medium
1386 changer device. */
1387 return 1;
1388 }
1389 return 0;
1390}
1391
1392static void internal_ibmmca_scsi_setup(char *str, int *ints)
1393{
1394 int i, j, io_base, id_base;
1395 char *token;
1396
1397 io_base = 0;
1398 id_base = 0;
1399 if (str) {
1400 j = 0;
1401 while ((token = strsep(&str, ",")) != NULL) {
1402 if (!strcmp(token, "activity"))
1403 display_mode |= LED_ACTIVITY;
1404 if (!strcmp(token, "display"))
1405 display_mode |= LED_DISP;
1406 if (!strcmp(token, "adisplay"))
1407 display_mode |= LED_ADISP;
1408 if (!strcmp(token, "normal"))
1409 ibm_ansi_order = 0;
1410 if (!strcmp(token, "ansi"))
1411 ibm_ansi_order = 1;
1412 if (!strcmp(token, "fast"))
1413 global_adapter_speed = 0;
1414 if (!strcmp(token, "medium"))
1415 global_adapter_speed = 4;
1416 if (!strcmp(token, "slow"))
1417 global_adapter_speed = 7;
1418 if ((*token == '-') || (isdigit(*token))) {
1419 if (!(j % 2) && (io_base < IM_MAX_HOSTS))
1420 io_port[io_base++] = simple_strtoul(token, NULL, 0);
1421 if ((j % 2) && (id_base < IM_MAX_HOSTS))
1422 scsi_id[id_base++] = simple_strtoul(token, NULL, 0);
1423 j++;
1424 }
1425 }
1426 } else if (ints) {
1427 for (i = 0; i < IM_MAX_HOSTS && 2 * i + 2 < ints[0]; i++) {
1428 io_port[i] = ints[2 * i + 2];
1429 scsi_id[i] = ints[2 * i + 2];
1430 }
1431 }
1432 return;
1433}
1434
1435static int ibmmca_getinfo(char *buf, int slot, void *dev_id)
1436{
1437 struct Scsi_Host *shpnt;
1438 int len, speciale, connectore, k;
1439 unsigned int pos[8];
1440 unsigned long flags;
1441 struct Scsi_Host *dev = dev_id;
1442
1443 spin_lock_irqsave(dev->host_lock, flags);
6391a113 1444
1da177e4
LT		 1445 shpnt = dev; /* assign host-structure to local pointer */
1446 len = 0; /* set filled text-buffer index to 0 */
1447 /* get the _special contents of the hostdata structure */
1448 speciale = ((struct ibmmca_hostdata *) shpnt->hostdata)->_special;
1449 connectore = ((struct ibmmca_hostdata *) shpnt->hostdata)->_connector_size;
1450 for (k = 2; k < 4; k++)
1451 pos[k] = ((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k];
1452 if (speciale == FORCED_DETECTION) { /* forced detection */
1453 len += sprintf(buf + len,
1454 "Adapter category: forced detected\n" "***************************************\n" "*** Forced detected SCSI Adapter ***\n" "*** No chip-information available ***\n" "***************************************\n");
1455 } else if (speciale == INTEGRATED_SCSI) {
1456 /* if the integrated subsystem has been found automatically: */
1457 len += sprintf(buf + len,
1458 "Adapter category: integrated\n" "Chip revision level: %d\n" "Chip status: %s\n" "8 kByte NVRAM status: %s\n", ((pos[2] & 0xf0) >> 4), (pos[2] & 1) ? "enabled" : "disabled", (pos[2] & 2) ? "locked" : "accessible");
6391a113 1459 } else if ((speciale >= 0) && (speciale < ARRAY_SIZE(subsys_list))) {
1da177e4
LT		 1460 /* if the subsystem is a slot adapter */
1461 len += sprintf(buf + len, "Adapter category: slot-card\n" "ROM Segment Address: ");
1462 if ((pos[2] & 0xf0) == 0xf0)
1463 len += sprintf(buf + len, "off\n");
1464 else
1465 len += sprintf(buf + len, "0x%x\n", ((pos[2] & 0xf0) << 13) + 0xc0000);
1466 len += sprintf(buf + len, "Chip status: %s\n", (pos[2] & 1) ? "enabled" : "disabled");
1467 len += sprintf(buf + len, "Adapter I/O Offset: 0x%x\n", ((pos[2] & 0x0e) << 2));
1468 } else {
1469 len += sprintf(buf + len, "Adapter category: unknown\n");
1470 }
1471 /* common subsystem information to write to the slotn file */
1472 len += sprintf(buf + len, "Subsystem PUN: %d\n", shpnt->this_id);
1473 len += sprintf(buf + len, "I/O base address range: 0x%x-0x%x\n", (unsigned int) (shpnt->io_port), (unsigned int) (shpnt->io_port + 7));
1474 len += sprintf(buf + len, "MCA-slot size: %d bits", connectore);
1475 /* Now make sure, the bufferlength is devidable by 4 to avoid
1476 * paging problems of the buffer. */
1477 while (len % sizeof(int) != (sizeof(int) - 1))
1478 len += sprintf(buf + len, " ");
1479 len += sprintf(buf + len, "\n");
6391a113 1480
1da177e4 1481 spin_unlock_irqrestore(shpnt->host_lock, flags);
6391a113 1482
1da177e4
LT		 1483 return len;
1484}
1485
d0be4a7d 1486int ibmmca_detect(struct scsi_host_template * scsi_template)
1da177e4
LT		 1487{
1488 struct Scsi_Host *shpnt;
6391a113 1489 int port, id, i, j, k, slot;
1da177e4
LT		 1490 int devices_on_irq_11 = 0;
1491 int devices_on_irq_14 = 0;
1492 int IRQ14_registered = 0;
1493 int IRQ11_registered = 0;
1494
1495 found = 0; /* make absolutely sure, that found is set to 0 */
1496
1497 /* First of all, print the version number of the driver. This is
1498 * important to allow better user bugreports in case of already
1499 * having problems with the MCA_bus probing. */
1500 printk(KERN_INFO "IBM MCA SCSI: Version %s\n", IBMMCA_SCSI_DRIVER_VERSION);
1501 /* if this is not MCA machine, return "nothing found" */
1502 if (!MCA_bus) {
1503 printk(KERN_INFO "IBM MCA SCSI: No Microchannel-bus present --> Aborting.\n" " This machine does not have any IBM MCA-bus\n" " or the MCA-Kernel-support is not enabled!\n");
1504 return 0;
1505 }
1506
1507#ifdef MODULE
1508 /* If the driver is run as module, read from conf.modules or cmd-line */
1509 if (boot_options)
1510 option_setup(boot_options);
1511#endif
1512
1513 /* get interrupt request level */
1514 if (request_irq(IM_IRQ, interrupt_handler, SA_SHIRQ, "ibmmcascsi", hosts)) {
1515 printk(KERN_ERR "IBM MCA SCSI: Unable to get shared IRQ %d.\n", IM_IRQ);
1516 return 0;
1517 } else
1518 IRQ14_registered++;
1519
1520 /* if ibmmcascsi setup option was passed to kernel, return "found" */
1521 for (i = 0; i < IM_MAX_HOSTS; i++)
1522 if (io_port[i] > 0 && scsi_id[i] >= 0 && scsi_id[i] < 8) {
1523 printk("IBM MCA SCSI: forced detected SCSI Adapter, io=0x%x, scsi id=%d.\n", io_port[i], scsi_id[i]);
1524 if ((shpnt = ibmmca_register(scsi_template, io_port[i], scsi_id[i], FORCED_DETECTION, "forced detected SCSI Adapter"))) {
1525 for (k = 2; k < 7; k++)
1526 ((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k] = 0;
1527 ((struct ibmmca_hostdata *) shpnt->hostdata)->_special = FORCED_DETECTION;
1528 mca_set_adapter_name(MCA_INTEGSCSI, "forced detected SCSI Adapter");
1529 mca_set_adapter_procfn(MCA_INTEGSCSI, (MCA_ProcFn) ibmmca_getinfo, shpnt);
1530 mca_mark_as_used(MCA_INTEGSCSI);
1531 devices_on_irq_14++;
1532 }
1533 }
1534 if (found)
1535 return found;
1536
1537 /* The POS2-register of all PS/2 model SCSI-subsystems has the following
1538 * interpretation of bits:
1539 * Bit 7 - 4 : Chip Revision ID (Release)
1540 * Bit 3 - 2 : Reserved
1541 * Bit 1 : 8k NVRAM Disabled
1542 * Bit 0 : Chip Enable (EN-Signal)
1543 * The POS3-register is interpreted as follows:
1544 * Bit 7 - 5 : SCSI ID
1545 * Bit 4 : Reserved = 0
1546 * Bit 3 - 0 : Reserved = 0
1547 * (taken from "IBM, PS/2 Hardware Interface Technical Reference, Common
1548 * Interfaces (1991)").
1549 * In short words, this means, that IBM PS/2 machines only support
1550 * 1 single subsystem by default. The slot-adapters must have another
1551 * configuration on pos2. Here, one has to assume the following
1552 * things for POS2-register:
1553 * Bit 7 - 4 : Chip Revision ID (Release)
1554 * Bit 3 - 1 : port offset factor
1555 * Bit 0 : Chip Enable (EN-Signal)
1556 * As I found a patch here, setting the IO-registers to 0x3540 forced,
1557 * as there was a 0x05 in POS2 on a model 56, I assume, that the
1558 * port 0x3540 must be fix for integrated SCSI-controllers.
1559 * Ok, this discovery leads to the following implementation: (M.Lang) */
1560
1561 /* first look for the IBM SCSI integrated subsystem on the motherboard */
1562 for (j = 0; j < 8; j++) /* read the pos-information */
1563 pos[j] = mca_read_stored_pos(MCA_INTEGSCSI, j);
1564 /* pos2 = pos3 = 0xff if there is no integrated SCSI-subsystem present, but
1565 * if we ignore the settings of all surrounding pos registers, it is not
1566 * completely sufficient to only check pos2 and pos3. */
1567 /* Therefore, now the following if statement is used to
1568 * make sure, we see a real integrated onboard SCSI-interface and no
1569 * internal system information, which gets mapped to some pos registers
1570 * on models 95xx. */
1571 if ((!pos[0] && !pos[1] && pos[2] > 0 && pos[3] > 0 && !pos[4] && !pos[5] && !pos[6] && !pos[7]) || (pos[0] == 0xff && pos[1] == 0xff && pos[2] < 0xff && pos[3] < 0xff && pos[4] == 0xff && pos[5] == 0xff && pos[6] == 0xff && pos[7] == 0xff)) {
1572 if ((pos[2] & 1) == 1) /* is the subsystem chip enabled ? */
1573 port = IM_IO_PORT;
1574 else { /* if disabled, no IRQs will be generated, as the chip won't
1575 * listen to the incoming commands and will do really nothing,
1576 * except for listening to the pos-register settings. If this
1577 * happens, I need to hugely think about it, as one has to
1578 * write something to the MCA-Bus pos register in order to
1579 * enable the chip. Normally, IBM-SCSI won't pass the POST,
1580 * when the chip is disabled (see IBM tech. ref.). */
1581 port = IM_IO_PORT; /* anyway, set the portnumber and warn */
1582 printk("IBM MCA SCSI: WARNING - Your SCSI-subsystem is disabled!\n" " SCSI-operations may not work.\n");
1583 }
1584 id = (pos[3] & 0xe0) >> 5; /* this is correct and represents the PUN */
1585 /* give detailed information on the subsystem. This helps me
1586 * additionally during debugging and analyzing bug-reports. */
1587 printk(KERN_INFO "IBM MCA SCSI: IBM Integrated SCSI Controller ffound, io=0x%x, scsi id=%d,\n", port, id);
1588 printk(KERN_INFO " chip rev.=%d, 8K NVRAM=%s, subsystem=%s\n", ((pos[2] & 0xf0) >> 4), (pos[2] & 2) ? "locked" : "accessible", (pos[2] & 1) ? "enabled." : "disabled.");
1589
1590 /* register the found integrated SCSI-subsystem */
1591 if ((shpnt = ibmmca_register(scsi_template, port, id, INTEGRATED_SCSI, "IBM Integrated SCSI Controller")))
1592 {
1593 for (k = 2; k < 7; k++)
1594 ((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k] = pos[k];
1595 ((struct ibmmca_hostdata *) shpnt->hostdata)->_special = INTEGRATED_SCSI;
1596 mca_set_adapter_name(MCA_INTEGSCSI, "IBM Integrated SCSI Controller");
1597 mca_set_adapter_procfn(MCA_INTEGSCSI, (MCA_ProcFn) ibmmca_getinfo, shpnt);
1598 mca_mark_as_used(MCA_INTEGSCSI);
1599 devices_on_irq_14++;
1600 }
1601 }
1602
1603 /* now look for other adapters in MCA slots, */
1604 /* determine the number of known IBM-SCSI-subsystem types */
1605 /* see the pos[2] dependence to get the adapter port-offset. */
6391a113 1606 for (i = 0; i < ARRAY_SIZE(subsys_list); i++) {
1da177e4
LT		 1607 /* scan each slot for a fitting adapter id */
1608 slot = 0; /* start at slot 0 */
1609 while ((slot = mca_find_adapter(subsys_list[i].mca_id, slot))
1610 != MCA_NOTFOUND) { /* scan through all slots */
1611 for (j = 0; j < 8; j++) /* read the pos-information */
1612 pos[j] = mca_read_stored_pos(slot, j);
1613 if ((pos[2] & 1) == 1)
1614 /* is the subsystem chip enabled ? */
1615 /* (explanations see above) */
1616 port = IM_IO_PORT + ((pos[2] & 0x0e) << 2);
1617 else {
1618 /* anyway, set the portnumber and warn */
1619 port = IM_IO_PORT + ((pos[2] & 0x0e) << 2);
1620 printk(KERN_WARNING "IBM MCA SCSI: WARNING - Your SCSI-subsystem is disabled!\n");
1621 printk(KERN_WARNING " SCSI-operations may not work.\n");
1622 }
1623 if ((i == IBM_SCSI2_FW) && (pos[6] != 0)) {
1624 printk(KERN_ERR "IBM MCA SCSI: ERROR - Wrong POS(6)-register setting!\n");
1625 printk(KERN_ERR " Impossible to determine adapter PUN!\n");
1626 printk(KERN_ERR " Guessing adapter PUN = 7.\n");
1627 id = 7;
1628 } else {
1629 id = (pos[3] & 0xe0) >> 5; /* get subsystem PUN */
1630 if (i == IBM_SCSI2_FW) {
1631 id |= (pos[3] & 0x10) >> 1; /* get subsystem PUN high-bit
1632 * for F/W adapters */
1633 }
1634 }
1635 if ((i == IBM_SCSI2_FW) && (pos[4] & 0x01) && (pos[6] == 0)) {
1636 /* IRQ11 is used by SCSI-2 F/W Adapter/A */
1637 printk(KERN_DEBUG "IBM MCA SCSI: SCSI-2 F/W adapter needs IRQ 11.\n");
1638 /* get interrupt request level */
1639 if (request_irq(IM_IRQ_FW, interrupt_handler, SA_SHIRQ, "ibmmcascsi", hosts)) {
1640 printk(KERN_ERR "IBM MCA SCSI: Unable to get shared IRQ %d.\n", IM_IRQ_FW);
1641 } else
1642 IRQ11_registered++;
1643 }
1644 printk(KERN_INFO "IBM MCA SCSI: %s found in slot %d, io=0x%x, scsi id=%d,\n", subsys_list[i].description, slot + 1, port, id);
1645 if ((pos[2] & 0xf0) == 0xf0)
1646 printk(KERN_DEBUG" ROM Addr.=off,");
1647 else
1648 printk(KERN_DEBUG " ROM Addr.=0x%x,", ((pos[2] & 0xf0) << 13) + 0xc0000);
1649 printk(KERN_DEBUG " port-offset=0x%x, subsystem=%s\n", ((pos[2] & 0x0e) << 2), (pos[2] & 1) ? "enabled." : "disabled.");
1650
1651 /* register the hostadapter */
1652 if ((shpnt = ibmmca_register(scsi_template, port, id, i, subsys_list[i].description))) {
1653 for (k = 2; k < 8; k++)
1654 ((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k] = pos[k];
1655 ((struct ibmmca_hostdata *) shpnt->hostdata)->_special = i;
1656 mca_set_adapter_name(slot, subsys_list[i].description);
1657 mca_set_adapter_procfn(slot, (MCA_ProcFn) ibmmca_getinfo, shpnt);
1658 mca_mark_as_used(slot);
1659 if ((i == IBM_SCSI2_FW) && (pos[4] & 0x01) && (pos[6] == 0))
1660 devices_on_irq_11++;
1661 else
1662 devices_on_irq_14++;
1663 }
1664 slot++; /* advance to next slot */
1665 } /* advance to next adapter id in the list of IBM-SCSI-subsystems */
1666 }
1667
1668 /* now check for SCSI-adapters, mapped to the integrated SCSI
1669 * area. E.g. a W/Cache in MCA-slot 9(!). Do the check correct here,
1670 * as this is a known effect on some models 95xx. */
6391a113 1671 for (i = 0; i < ARRAY_SIZE(subsys_list); i++) {
1da177e4
LT		 1672 /* scan each slot for a fitting adapter id */
1673 slot = mca_find_adapter(subsys_list[i].mca_id, MCA_INTEGSCSI);
1674 if (slot != MCA_NOTFOUND) { /* scan through all slots */
1675 for (j = 0; j < 8; j++) /* read the pos-information */
1676 pos[j] = mca_read_stored_pos(slot, j);
1677 if ((pos[2] & 1) == 1) { /* is the subsystem chip enabled ? */
1678 /* (explanations see above) */
1679 port = IM_IO_PORT + ((pos[2] & 0x0e) << 2);
1680 } else { /* anyway, set the portnumber and warn */
1681 port = IM_IO_PORT + ((pos[2] & 0x0e) << 2);
1682 printk(KERN_WARNING "IBM MCA SCSI: WARNING - Your SCSI-subsystem is disabled!\n");
1683 printk(KERN_WARNING " SCSI-operations may not work.\n");
1684 }
1685 if ((i == IBM_SCSI2_FW) && (pos[6] != 0)) {
1686 printk(KERN_ERR "IBM MCA SCSI: ERROR - Wrong POS(6)-register setting!\n");
1687 printk(KERN_ERR " Impossible to determine adapter PUN!\n");
1688 printk(KERN_ERR " Guessing adapter PUN = 7.\n");
1689 id = 7;
1690 } else {
1691 id = (pos[3] & 0xe0) >> 5; /* get subsystem PUN */
1692 if (i == IBM_SCSI2_FW)
1693 id |= (pos[3] & 0x10) >> 1; /* get subsystem PUN high-bit
1694 * for F/W adapters */
1695 }
1696 if ((i == IBM_SCSI2_FW) && (pos[4] & 0x01) && (pos[6] == 0)) {
1697 /* IRQ11 is used by SCSI-2 F/W Adapter/A */
1698 printk(KERN_DEBUG "IBM MCA SCSI: SCSI-2 F/W adapter needs IRQ 11.\n");
1699 /* get interrupt request level */
1700 if (request_irq(IM_IRQ_FW, interrupt_handler, SA_SHIRQ, "ibmmcascsi", hosts))
1701 printk(KERN_ERR "IBM MCA SCSI: Unable to get shared IRQ %d.\n", IM_IRQ_FW);
1702 else
1703 IRQ11_registered++;
1704 }
1705 printk(KERN_INFO "IBM MCA SCSI: %s found in slot %d, io=0x%x, scsi id=%d,\n", subsys_list[i].description, slot + 1, port, id);
1706 if ((pos[2] & 0xf0) == 0xf0)
1707 printk(KERN_DEBUG " ROM Addr.=off,");
1708 else
1709 printk(KERN_DEBUG " ROM Addr.=0x%x,", ((pos[2] & 0xf0) << 13) + 0xc0000);
1710 printk(KERN_DEBUG " port-offset=0x%x, subsystem=%s\n", ((pos[2] & 0x0e) << 2), (pos[2] & 1) ? "enabled." : "disabled.");
1711
1712 /* register the hostadapter */
1713 if ((shpnt = ibmmca_register(scsi_template, port, id, i, subsys_list[i].description))) {
1714 for (k = 2; k < 7; k++)
1715 ((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k] = pos[k];
1716 ((struct ibmmca_hostdata *) shpnt->hostdata)->_special = i;
1717 mca_set_adapter_name(slot, subsys_list[i].description);
1718 mca_set_adapter_procfn(slot, (MCA_ProcFn) ibmmca_getinfo, shpnt);
1719 mca_mark_as_used(slot);
1720 if ((i == IBM_SCSI2_FW) && (pos[4] & 0x01) && (pos[6] == 0))
1721 devices_on_irq_11++;
1722 else
1723 devices_on_irq_14++;
1724 }
1725 slot++; /* advance to next slot */
1726 } /* advance to next adapter id in the list of IBM-SCSI-subsystems */
1727 }
1728 if (IRQ11_registered && !devices_on_irq_11)
1729 free_irq(IM_IRQ_FW, hosts); /* no devices on IRQ 11 */
1730 if (IRQ14_registered && !devices_on_irq_14)
1731 free_irq(IM_IRQ, hosts); /* no devices on IRQ 14 */
1732 if (!devices_on_irq_11 && !devices_on_irq_14)
1733 printk(KERN_WARNING "IBM MCA SCSI: No IBM SCSI-subsystem adapter attached.\n");
1734 return found; /* return the number of found SCSI hosts. Should be 1 or 0. */
1735}
1736
d0be4a7d 1737static struct Scsi_Host *ibmmca_register(struct scsi_host_template * scsi_template, int port, int id, int adaptertype, char *hostname)
1da177e4
LT		 1738{
1739 struct Scsi_Host *shpnt;
1740 int i, j;
1741 unsigned int ctrl;
1742
1743 /* check I/O region */
1744 if (!request_region(port, IM_N_IO_PORT, hostname)) {
1745 printk(KERN_ERR "IBM MCA SCSI: Unable to get I/O region 0x%x-0x%x (%d ports).\n", port, port + IM_N_IO_PORT - 1, IM_N_IO_PORT);
1746 return NULL;
1747 }
1748
1749 /* register host */
1750 shpnt = scsi_register(scsi_template, sizeof(struct ibmmca_hostdata));
1751 if (!shpnt) {
1752 printk(KERN_ERR "IBM MCA SCSI: Unable to register host.\n");
1753 release_region(port, IM_N_IO_PORT);
1754 return NULL;
1755 }
1756
1757 /* request I/O region */
1758 hosts[found] = shpnt; /* add new found hostadapter to the list */
1759 special(found) = adaptertype; /* important assignment or else crash! */
1760 subsystem_connector_size(found) = 0; /* preset slot-size */
1761 shpnt->irq = IM_IRQ; /* assign necessary stuff for the adapter */
1762 shpnt->io_port = port;
1763 shpnt->n_io_port = IM_N_IO_PORT;
1764 shpnt->this_id = id;
1765 shpnt->max_id = 8; /* 8 PUNs are default */
1766 /* now, the SCSI-subsystem is connected to Linux */
1767
1768 ctrl = (unsigned int) (inb(IM_CTR_REG(found))); /* get control-register status */
1769#ifdef IM_DEBUG_PROBE
1770 printk("IBM MCA SCSI: Control Register contents: %x, status: %x\n", ctrl, inb(IM_STAT_REG(found)));
1771 printk("IBM MCA SCSI: This adapters' POS-registers: ");
1772 for (i = 0; i < 8; i++)
1773 printk("%x ", pos[i]);
1774 printk("\n");
1775#endif
1776 reset_status(found) = IM_RESET_NOT_IN_PROGRESS;
1777
1778 for (i = 0; i < 16; i++) /* reset the tables */
1779 for (j = 0; j < 8; j++)
1780 get_ldn(found)[i][j] = MAX_LOG_DEV;
1781
1782 /* check which logical devices exist */
1783 /* after this line, local interrupting is possible: */
1784 local_checking_phase_flag(found) = 1;
1785 check_devices(found, adaptertype); /* call by value, using the global variable hosts */
1786 local_checking_phase_flag(found) = 0;
1787 found++; /* now increase index to be prepared for next found subsystem */
1788 /* an ibm mca subsystem has been detected */
1789 return shpnt;
1790}
1791
1792static int ibmmca_release(struct Scsi_Host *shpnt)
1793{
1794 release_region(shpnt->io_port, shpnt->n_io_port);
1795 if (!(--found))
1796 free_irq(shpnt->irq, hosts);
1797 return 0;
1798}
1799
1800/* The following routine is the SCSI command queue for the midlevel driver */
1801static int ibmmca_queuecommand(Scsi_Cmnd * cmd, void (*done) (Scsi_Cmnd *))
1802{
1803 unsigned int ldn;
1804 unsigned int scsi_cmd;
1805 struct im_scb *scb;
1806 struct Scsi_Host *shpnt;
1807 int current_ldn;
1808 int id, lun;
1809 int target;
1810 int host_index;
1811 int max_pun;
1812 int i;
1813 struct scatterlist *sl;
1814
1815 shpnt = cmd->device->host;
1816 /* search for the right hostadapter */
1817 for (host_index = 0; hosts[host_index] && hosts[host_index]->host_no != shpnt->host_no; host_index++);
1818
1819 if (!hosts[host_index]) { /* invalid hostadapter descriptor address */
1820 cmd->result = DID_NO_CONNECT << 16;
1821 if (done)
1822 done(cmd);
1823 return 0;
1824 }
1825 max_pun = subsystem_maxid(host_index);
1826 if (ibm_ansi_order) {
1827 target = max_pun - 1 - cmd->device->id;
1828 if ((target <= subsystem_pun(host_index)) && (cmd->device->id <= subsystem_pun(host_index)))
1829 target--;
1830 else if ((target >= subsystem_pun(host_index)) && (cmd->device->id >= subsystem_pun(host_index)))
1831 target++;
1832 } else
1833 target = cmd->device->id;
1834
1835 /* if (target,lun) is NO LUN or not existing at all, return error */
1836 if ((get_scsi(host_index)[target][cmd->device->lun] == TYPE_NO_LUN) || (get_scsi(host_index)[target][cmd->device->lun] == TYPE_NO_DEVICE)) {
1837 cmd->result = DID_NO_CONNECT << 16;
1838 if (done)
1839 done(cmd);
1840 return 0;
1841 }
1842
1843 /*if (target,lun) unassigned, do further checks... */
1844 ldn = get_ldn(host_index)[target][cmd->device->lun];
1845 if (ldn >= MAX_LOG_DEV) { /* on invalid ldn do special stuff */
1846 if (ldn > MAX_LOG_DEV) { /* dynamical remapping if ldn unassigned */
1847 current_ldn = next_ldn(host_index); /* stop-value for one circle */
1848 while (ld(host_index)[next_ldn(host_index)].cmd) { /* search for a occupied, but not in */
1849 /* command-processing ldn. */
1850 next_ldn(host_index)++;
1851 if (next_ldn(host_index) >= MAX_LOG_DEV)
1852 next_ldn(host_index) = 7;
1853 if (current_ldn == next_ldn(host_index)) { /* One circle done ? */
1854 /* no non-processing ldn found */
017560fc
JG		 1855 scmd_printk(KERN_WARNING, cmd,
1856 "IBM MCA SCSI: Cannot assign SCSI-device dynamically!\n"
1857 " On ldn 7-14 SCSI-commands everywhere in progress.\n"
1858 " Reporting DID_NO_CONNECT for device.\n");
1da177e4
LT		 1859 cmd->result = DID_NO_CONNECT << 16; /* return no connect */
1860 if (done)
1861 done(cmd);
1862 return 0;
1863 }
1864 }
1865
1866 /* unmap non-processing ldn */
1867 for (id = 0; id < max_pun; id++)
1868 for (lun = 0; lun < 8; lun++) {
1869 if (get_ldn(host_index)[id][lun] == next_ldn(host_index)) {
1870 get_ldn(host_index)[id][lun] = TYPE_NO_DEVICE;
1871 get_scsi(host_index)[id][lun] = TYPE_NO_DEVICE;
1872 /* unmap entry */
1873 }
1874 }
1875 /* set reduced interrupt_handler-mode for checking */
1876 local_checking_phase_flag(host_index) = 1;
1877 /* map found ldn to pun,lun */
1878 get_ldn(host_index)[target][cmd->device->lun] = next_ldn(host_index);
1879 /* change ldn to the right value, that is now next_ldn */
1880 ldn = next_ldn(host_index);
1881 /* unassign all ldns (pun,lun,ldn does not matter for remove) */
1882 immediate_assign(host_index, 0, 0, 0, REMOVE_LDN);
1883 /* set only LDN for remapped device */
1884 immediate_assign(host_index, target, cmd->device->lun, ldn, SET_LDN);
1885 /* get device information for ld[ldn] */
1886 if (device_exists(host_index, ldn, &ld(host_index)[ldn].block_length, &ld(host_index)[ldn].device_type)) {
1887 ld(host_index)[ldn].cmd = NULL; /* To prevent panic set 0, because
1888 devices that were not assigned,
1889 should have nothing in progress. */
1890 get_scsi(host_index)[target][cmd->device->lun] = ld(host_index)[ldn].device_type;
1891 /* increase assignment counters for statistics in /proc */
1892 IBM_DS(host_index).dynamical_assignments++;
1893 IBM_DS(host_index).ldn_assignments[ldn]++;
1894 } else
1895 /* panic here, because a device, found at boottime has
1896 vanished */
1897 panic("IBM MCA SCSI: ldn=0x%x, SCSI-device on (%d,%d) vanished!\n", ldn, target, cmd->device->lun);
1898 /* unassign again all ldns (pun,lun,ldn does not matter for remove) */
1899 immediate_assign(host_index, 0, 0, 0, REMOVE_LDN);
1900 /* remap all ldns, as written in the pun/lun table */
1901 lun = 0;
1902#ifdef CONFIG_SCSI_MULTI_LUN
1903 for (lun = 0; lun < 8; lun++)
1904#endif
1905 for (id = 0; id < max_pun; id++) {
1906 if (get_ldn(host_index)[id][lun] <= MAX_LOG_DEV)
1907 immediate_assign(host_index, id, lun, get_ldn(host_index)[id][lun], SET_LDN);
1908 }
1909 /* set back to normal interrupt_handling */
1910 local_checking_phase_flag(host_index) = 0;
1911#ifdef IM_DEBUG_PROBE
1912 /* Information on syslog terminal */
1913 printk("IBM MCA SCSI: ldn=0x%x dynamically reassigned to (%d,%d).\n", ldn, target, cmd->device->lun);
1914#endif
1915 /* increase next_ldn for next dynamical assignment */
1916 next_ldn(host_index)++;
1917 if (next_ldn(host_index) >= MAX_LOG_DEV)
1918 next_ldn(host_index) = 7;
1919 } else { /* wall against Linux accesses to the subsystem adapter */
1920 cmd->result = DID_BAD_TARGET << 16;
1921 if (done)
1922 done(cmd);
1923 return 0;
1924 }
1925 }
1926
1927 /*verify there is no command already in progress for this log dev */
1928 if (ld(host_index)[ldn].cmd)
1929 panic("IBM MCA SCSI: cmd already in progress for this ldn.\n");
1930
1931 /*save done in cmd, and save cmd for the interrupt handler */
1932 cmd->scsi_done = done;
1933 ld(host_index)[ldn].cmd = cmd;
1934
1935 /*fill scb information independent of the scsi command */
1936 scb = &(ld(host_index)[ldn].scb);
1937 ld(host_index)[ldn].tsb.dev_status = 0;
1938 scb->enable = IM_REPORT_TSB_ONLY_ON_ERROR | IM_RETRY_ENABLE;
1939 scb->tsb_adr = isa_virt_to_bus(&(ld(host_index)[ldn].tsb));
1940 scsi_cmd = cmd->cmnd[0];
1941
1942 if (cmd->use_sg) {
1943 i = cmd->use_sg;
1944 sl = (struct scatterlist *) (cmd->request_buffer);
1945 if (i > 16)
1946 panic("IBM MCA SCSI: scatter-gather list too long.\n");
1947 while (--i >= 0) {
1948 ld(host_index)[ldn].sge[i].address = (void *) (isa_page_to_bus(sl[i].page) + sl[i].offset);
1949 ld(host_index)[ldn].sge[i].byte_length = sl[i].length;
1950 }
1951 scb->enable |= IM_POINTER_TO_LIST;
1952 scb->sys_buf_adr = isa_virt_to_bus(&(ld(host_index)[ldn].sge[0]));
1953 scb->sys_buf_length = cmd->use_sg * sizeof(struct im_sge);
1954 } else {
1955 scb->sys_buf_adr = isa_virt_to_bus(cmd->request_buffer);
1956 /* recent Linux midlevel SCSI places 1024 byte for inquiry
1957 * command. Far too much for old PS/2 hardware. */
1958 switch (scsi_cmd) {
1959 /* avoid command errors by setting bufferlengths to
1960 * ANSI-standard. Beware of forcing it to 255,
1961 * this could SEGV the kernel!!! */
1962 case INQUIRY:
1963 case REQUEST_SENSE:
1964 case MODE_SENSE:
1965 case MODE_SELECT:
1966 if (cmd->request_bufflen > 255)
1967 scb->sys_buf_length = 255;
1968 else
1969 scb->sys_buf_length = cmd->request_bufflen;
1970 break;
1971 case TEST_UNIT_READY:
1972 scb->sys_buf_length = 0;
1973 break;
1974 default:
1975 scb->sys_buf_length = cmd->request_bufflen;
1976 break;
1977 }
1978 }
1979 /*fill scb information dependent on scsi command */
1980
1981#ifdef IM_DEBUG_CMD
1982 printk("issue scsi cmd=%02x to ldn=%d\n", scsi_cmd, ldn);
1983#endif
1984
1985 /* for specific device-type debugging: */
1986#ifdef IM_DEBUG_CMD_SPEC_DEV
1987 if (ld(host_index)[ldn].device_type == IM_DEBUG_CMD_DEVICE)
1988 printk("(SCSI-device-type=0x%x) issue scsi cmd=%02x to ldn=%d\n", ld(host_index)[ldn].device_type, scsi_cmd, ldn);
1989#endif
1990
1991 /* for possible panics store current command */
1992 last_scsi_command(host_index)[ldn] = scsi_cmd;
1993 last_scsi_type(host_index)[ldn] = IM_SCB;
1994 /* update statistical info */
1995 IBM_DS(host_index).total_accesses++;
1996 IBM_DS(host_index).ldn_access[ldn]++;
1997
1998 switch (scsi_cmd) {
1999 case READ_6:
2000 case WRITE_6:
2001 case READ_10:
2002 case WRITE_10:
2003 case READ_12:
2004 case WRITE_12:
2005 /* Distinguish between disk and other devices. Only disks (that are the
2006 most frequently accessed devices) should be supported by the
2007 IBM-SCSI-Subsystem commands. */
2008 switch (ld(host_index)[ldn].device_type) {
2009 case TYPE_DISK: /* for harddisks enter here ... */
2010 case TYPE_MOD: /* ... try it also for MO-drives (send flames as */
2011 /* you like, if this won't work.) */
2012 if (scsi_cmd == READ_6 || scsi_cmd == READ_10 || scsi_cmd == READ_12) {
2013 /* read command preparations */
2014 scb->enable |= IM_READ_CONTROL;
2015 IBM_DS(host_index).ldn_read_access[ldn]++; /* increase READ-access on ldn stat. */
2016 scb->command = IM_READ_DATA_CMD | IM_NO_DISCONNECT;
2017 } else { /* write command preparations */
2018 IBM_DS(host_index).ldn_write_access[ldn]++; /* increase write-count on ldn stat. */
2019 scb->command = IM_WRITE_DATA_CMD | IM_NO_DISCONNECT;
2020 }
2021 if (scsi_cmd == READ_6 || scsi_cmd == WRITE_6) {
2022 scb->u1.log_blk_adr = (((unsigned) cmd->cmnd[3]) << 0) | (((unsigned) cmd->cmnd[2]) << 8) | ((((unsigned) cmd->cmnd[1]) & 0x1f) << 16);
2023 scb->u2.blk.count = (unsigned) cmd->cmnd[4];
2024 } else {
2025 scb->u1.log_blk_adr = (((unsigned) cmd->cmnd[5]) << 0) | (((unsigned) cmd->cmnd[4]) << 8) | (((unsigned) cmd->cmnd[3]) << 16) | (((unsigned) cmd->cmnd[2]) << 24);
2026 scb->u2.blk.count = (((unsigned) cmd->cmnd[8]) << 0) | (((unsigned) cmd->cmnd[7]) << 8);
2027 }
2028 last_scsi_logical_block(host_index)[ldn] = scb->u1.log_blk_adr;
2029 last_scsi_blockcount(host_index)[ldn] = scb->u2.blk.count;
2030 scb->u2.blk.length = ld(host_index)[ldn].block_length;
2031 break;
2032 /* for other devices, enter here. Other types are not known by
2033 Linux! TYPE_NO_LUN is forbidden as valid device. */
2034 case TYPE_ROM:
2035 case TYPE_TAPE:
2036 case TYPE_PROCESSOR:
2037 case TYPE_WORM:
2038 case TYPE_SCANNER:
2039 case TYPE_MEDIUM_CHANGER:
2040 /* If there is a sequential-device, IBM recommends to use
2041 IM_OTHER_SCSI_CMD_CMD instead of subsystem READ/WRITE.
2042 This includes CD-ROM devices, too, due to the partial sequential
2043 read capabilities. */
2044 scb->command = IM_OTHER_SCSI_CMD_CMD;
2045 if (scsi_cmd == READ_6 || scsi_cmd == READ_10 || scsi_cmd == READ_12)
2046 /* enable READ */
2047 scb->enable |= IM_READ_CONTROL;
2048 scb->enable |= IM_BYPASS_BUFFER;
2049 scb->u1.scsi_cmd_length = cmd->cmd_len;
2050 memcpy(scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len);
2051 last_scsi_type(host_index)[ldn] = IM_LONG_SCB;
2052 /* Read/write on this non-disk devices is also displayworthy,
2053 so flash-up the LED/display. */
2054 break;
2055 }
2056 break;
2057 case INQUIRY:
2058 IBM_DS(host_index).ldn_inquiry_access[ldn]++;
2059 scb->command = IM_DEVICE_INQUIRY_CMD;
2060 scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER;
2061 scb->u1.log_blk_adr = 0;
2062 break;
2063 case TEST_UNIT_READY:
2064 scb->command = IM_OTHER_SCSI_CMD_CMD;
2065 scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER;
2066 scb->u1.log_blk_adr = 0;
2067 scb->u1.scsi_cmd_length = 6;
2068 memcpy(scb->u2.scsi_command, cmd->cmnd, 6);
2069 last_scsi_type(host_index)[ldn] = IM_LONG_SCB;
2070 break;
2071 case READ_CAPACITY:
2072 /* the length of system memory buffer must be exactly 8 bytes */
2073 scb->command = IM_READ_CAPACITY_CMD;
2074 scb->enable |= IM_READ_CONTROL | IM_BYPASS_BUFFER;
2075 if (scb->sys_buf_length > 8)
2076 scb->sys_buf_length = 8;
2077 break;
2078 /* Commands that need read-only-mode (system <- device): */
2079 case REQUEST_SENSE:
2080 scb->command = IM_REQUEST_SENSE_CMD;
2081 scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER;
2082 break;
2083 /* Commands that need write-only-mode (system -> device): */
2084 case MODE_SELECT:
2085 case MODE_SELECT_10:
2086 IBM_DS(host_index).ldn_modeselect_access[ldn]++;
2087 scb->command = IM_OTHER_SCSI_CMD_CMD;
2088 scb->enable |= IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER; /*Select needs WRITE-enabled */
2089 scb->u1.scsi_cmd_length = cmd->cmd_len;
2090 memcpy(scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len);
2091 last_scsi_type(host_index)[ldn] = IM_LONG_SCB;
2092 break;
2093 /* For other commands, read-only is useful. Most other commands are
2094 running without an input-data-block. */
2095 default:
2096 scb->command = IM_OTHER_SCSI_CMD_CMD;
2097 scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER;
2098 scb->u1.scsi_cmd_length = cmd->cmd_len;
2099 memcpy(scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len);
2100 last_scsi_type(host_index)[ldn] = IM_LONG_SCB;
2101 break;
2102 }
2103 /*issue scb command, and return */
2104 if (++disk_rw_in_progress == 1)
2105 PS2_DISK_LED_ON(shpnt->host_no, target);
2106
2107 if (last_scsi_type(host_index)[ldn] == IM_LONG_SCB) {
2108 issue_cmd(host_index, isa_virt_to_bus(scb), IM_LONG_SCB | ldn);
2109 IBM_DS(host_index).long_scbs++;
2110 } else {
2111 issue_cmd(host_index, isa_virt_to_bus(scb), IM_SCB | ldn);
2112 IBM_DS(host_index).scbs++;
2113 }
2114 return 0;
2115}
2116
8fa728a2 2117static int __ibmmca_abort(Scsi_Cmnd * cmd)
1da177e4
LT		 2118{
2119 /* Abort does not work, as the adapter never generates an interrupt on
2120 * whatever situation is simulated, even when really pending commands
2121 * are running on the adapters' hardware ! */
2122
2123 struct Scsi_Host *shpnt;
2124 unsigned int ldn;
2125 void (*saved_done) (Scsi_Cmnd *);
2126 int target;
2127 int host_index;
2128 int max_pun;
2129 unsigned long imm_command;
2130
2131#ifdef IM_DEBUG_PROBE
2132 printk("IBM MCA SCSI: Abort subroutine called...\n");
2133#endif
2134
2135 shpnt = cmd->device->host;
2136 /* search for the right hostadapter */
2137 for (host_index = 0; hosts[host_index] && hosts[host_index]->host_no != shpnt->host_no; host_index++);
2138
2139 if (!hosts[host_index]) { /* invalid hostadapter descriptor address */
2140 cmd->result = DID_NO_CONNECT << 16;
2141 if (cmd->scsi_done)
2142 (cmd->scsi_done) (cmd);
2143 shpnt = cmd->device->host;
2144#ifdef IM_DEBUG_PROBE
2145 printk(KERN_DEBUG "IBM MCA SCSI: Abort adapter selection failed!\n");
2146#endif
2147 return SUCCESS;
2148 }
2149 max_pun = subsystem_maxid(host_index);
2150 if (ibm_ansi_order) {
2151 target = max_pun - 1 - cmd->device->id;
2152 if ((target <= subsystem_pun(host_index)) && (cmd->device->id <= subsystem_pun(host_index)))
2153 target--;
2154 else if ((target >= subsystem_pun(host_index)) && (cmd->device->id >= subsystem_pun(host_index)))
2155 target++;
2156 } else
2157 target = cmd->device->id;
2158
2159 /* get logical device number, and disable system interrupts */
2160 printk(KERN_WARNING "IBM MCA SCSI: Sending abort to device pun=%d, lun=%d.\n", target, cmd->device->lun);
2161 ldn = get_ldn(host_index)[target][cmd->device->lun];
2162
2163 /*if cmd for this ldn has already finished, no need to abort */
2164 if (!ld(host_index)[ldn].cmd) {
2165 return SUCCESS;
2166 }
2167
2168 /* Clear ld.cmd, save done function, install internal done,
2169 * send abort immediate command (this enables sys. interrupts),
2170 * and wait until the interrupt arrives.
2171 */
2172 saved_done = cmd->scsi_done;
2173 cmd->scsi_done = internal_done;
2174 cmd->SCp.Status = 0;
2175 last_scsi_command(host_index)[ldn] = IM_ABORT_IMM_CMD;
2176 last_scsi_type(host_index)[ldn] = IM_IMM_CMD;
2177 imm_command = inl(IM_CMD_REG(host_index));
2178 imm_command &= (unsigned long) (0xffff0000); /* mask reserved stuff */
2179 imm_command |= (unsigned long) (IM_ABORT_IMM_CMD);
2180 /* must wait for attention reg not busy */
2181 /* FIXME - timeout, politeness */
2182 while (1) {
2183 if (!(inb(IM_STAT_REG(host_index)) & IM_BUSY))
2184 break;
2185 }
2186 /* write registers and enable system interrupts */
2187 outl(imm_command, IM_CMD_REG(host_index));
2188 outb(IM_IMM_CMD | ldn, IM_ATTN_REG(host_index));
2189#ifdef IM_DEBUG_PROBE
2190 printk("IBM MCA SCSI: Abort queued to adapter...\n");
2191#endif
2192 spin_unlock_irq(shpnt->host_lock);
2193 while (!cmd->SCp.Status)
2194 yield();
2195 spin_lock_irq(shpnt->host_lock);
2196 cmd->scsi_done = saved_done;
2197#ifdef IM_DEBUG_PROBE
2198 printk("IBM MCA SCSI: Abort returned with adapter response...\n");
2199#endif
2200
2201 /*if abort went well, call saved done, then return success or error */
2202 if (cmd->result == (DID_ABORT << 16))
2203 {
2204 cmd->result |= DID_ABORT << 16;
2205 if (cmd->scsi_done)
2206 (cmd->scsi_done) (cmd);
2207 ld(host_index)[ldn].cmd = NULL;
2208#ifdef IM_DEBUG_PROBE
2209 printk("IBM MCA SCSI: Abort finished with success.\n");
2210#endif
2211 return SUCCESS;
2212 } else {
2213 cmd->result |= DID_NO_CONNECT << 16;
2214 if (cmd->scsi_done)
2215 (cmd->scsi_done) (cmd);
2216 ld(host_index)[ldn].cmd = NULL;
2217#ifdef IM_DEBUG_PROBE
2218 printk("IBM MCA SCSI: Abort failed.\n");
2219#endif
2220 return FAILED;
2221 }
2222}
2223
8fa728a2
JG		 2224static int ibmmca_abort(Scsi_Cmnd * cmd)
2225{
2226 struct Scsi_Host *shpnt = cmd->device->host;
2227 int rc;
2228
2229 spin_lock_irq(shpnt->host_lock);
2230 rc = __ibmmca_abort(cmd);
2231 spin_unlock_irq(shpnt->host_lock);
2232
2233 return rc;
2234}
2235
df0ae249 2236static int __ibmmca_host_reset(Scsi_Cmnd * cmd)
1da177e4
LT		 2237{
2238 struct Scsi_Host *shpnt;
2239 Scsi_Cmnd *cmd_aid;
2240 int ticks, i;
2241 int host_index;
2242 unsigned long imm_command;
2243
2244 if (cmd == NULL)
2245 BUG();
2246
2247 ticks = IM_RESET_DELAY * HZ;
2248 shpnt = cmd->device->host;
2249 /* search for the right hostadapter */
2250 for (host_index = 0; hosts[host_index] && hosts[host_index]->host_no != shpnt->host_no; host_index++);
2251
2252 if (!hosts[host_index]) /* invalid hostadapter descriptor address */
2253 return FAILED;
2254
2255 if (local_checking_phase_flag(host_index)) {
2256 printk(KERN_WARNING "IBM MCA SCSI: unable to reset while checking devices.\n");
2257 return FAILED;
2258 }
2259
2260 /* issue reset immediate command to subsystem, and wait for interrupt */
2261 printk("IBM MCA SCSI: resetting all devices.\n");
2262 reset_status(host_index) = IM_RESET_IN_PROGRESS;
2263 last_scsi_command(host_index)[0xf] = IM_RESET_IMM_CMD;
2264 last_scsi_type(host_index)[0xf] = IM_IMM_CMD;
2265 imm_command = inl(IM_CMD_REG(host_index));
2266 imm_command &= (unsigned long) (0xffff0000); /* mask reserved stuff */
2267 imm_command |= (unsigned long) (IM_RESET_IMM_CMD);
2268 /* must wait for attention reg not busy */
2269 while (1) {
2270 if (!(inb(IM_STAT_REG(host_index)) & IM_BUSY))
2271 break;
2272 spin_unlock_irq(shpnt->host_lock);
2273 yield();
2274 spin_lock_irq(shpnt->host_lock);
2275 }
2276 /*write registers and enable system interrupts */
2277 outl(imm_command, IM_CMD_REG(host_index));
2278 outb(IM_IMM_CMD | 0xf, IM_ATTN_REG(host_index));
2279 /* wait for interrupt finished or intr_stat register to be set, as the
2280 * interrupt will not be executed, while we are in here! */
2281
2282 /* FIXME: This is really really icky we so want a sleeping version of this ! */
2283 while (reset_status(host_index) == IM_RESET_IN_PROGRESS && --ticks && ((inb(IM_INTR_REG(host_index)) & 0x8f) != 0x8f)) {
2284 udelay((1 + 999 / HZ) * 1000);
2285 barrier();
2286 }
2287 /* if reset did not complete, just return an error */
2288 if (!ticks) {
2289 printk(KERN_ERR "IBM MCA SCSI: reset did not complete within %d seconds.\n", IM_RESET_DELAY);
2290 reset_status(host_index) = IM_RESET_FINISHED_FAIL;
2291 return FAILED;
2292 }
2293
2294 if ((inb(IM_INTR_REG(host_index)) & 0x8f) == 0x8f) {
2295 /* analysis done by this routine and not by the intr-routine */
2296 if (inb(IM_INTR_REG(host_index)) == 0xaf)
2297 reset_status(host_index) = IM_RESET_FINISHED_OK_NO_INT;
2298 else if (inb(IM_INTR_REG(host_index)) == 0xcf)
2299 reset_status(host_index) = IM_RESET_FINISHED_FAIL;
2300 else /* failed, 4get it */
2301 reset_status(host_index) = IM_RESET_NOT_IN_PROGRESS_NO_INT;
2302 outb(IM_EOI | 0xf, IM_ATTN_REG(host_index));
2303 }
2304
2305 /* if reset failed, just return an error */
2306 if (reset_status(host_index) == IM_RESET_FINISHED_FAIL) {
2307 printk(KERN_ERR "IBM MCA SCSI: reset failed.\n");
2308 return FAILED;
2309 }
2310
2311 /* so reset finished ok - call outstanding done's, and return success */
2312 printk(KERN_INFO "IBM MCA SCSI: Reset successfully completed.\n");
2313 for (i = 0; i < MAX_LOG_DEV; i++) {
2314 cmd_aid = ld(host_index)[i].cmd;
2315 if (cmd_aid && cmd_aid->scsi_done) {
2316 ld(host_index)[i].cmd = NULL;
2317 cmd_aid->result = DID_RESET << 16;
2318 }
2319 }
2320 return SUCCESS;
2321}
2322
df0ae249
JG		 2323static int ibmmca_host_reset(Scsi_Cmnd * cmd)
2324{
2325 struct Scsi_Host *shpnt = cmd->device->host;
2326 int rc;
2327
2328 spin_lock_irq(shpnt->host_lock);
2329 rc = __ibmmca_host_reset(cmd);
2330 spin_unlock_irq(shpnt->host_lock);
2331
2332 return rc;
2333}
2334
1da177e4
LT		 2335static int ibmmca_biosparam(struct scsi_device *sdev, struct block_device *bdev, sector_t capacity, int *info)
2336{
2337 int size = capacity;
2338 info[0] = 64;
2339 info[1] = 32;
2340 info[2] = size / (info[0] * info[1]);
2341 if (info[2] >= 1024) {
2342 info[0] = 128;
2343 info[1] = 63;
2344 info[2] = size / (info[0] * info[1]);
2345 if (info[2] >= 1024) {
2346 info[0] = 255;
2347 info[1] = 63;
2348 info[2] = size / (info[0] * info[1]);
2349 if (info[2] >= 1024)
2350 info[2] = 1023;
2351 }
2352 }
2353 return 0;
2354}
2355
2356/* calculate percentage of total accesses on a ldn */
2357static int ldn_access_load(int host_index, int ldn)
2358{
2359 if (IBM_DS(host_index).total_accesses == 0)
2360 return (0);
2361 if (IBM_DS(host_index).ldn_access[ldn] == 0)
2362 return (0);
2363 return (IBM_DS(host_index).ldn_access[ldn] * 100) / IBM_DS(host_index).total_accesses;
2364}
2365
2366/* calculate total amount of r/w-accesses */
2367static int ldn_access_total_read_write(int host_index)
2368{
2369 int a;
2370 int i;
2371
2372 a = 0;
2373 for (i = 0; i <= MAX_LOG_DEV; i++)
2374 a += IBM_DS(host_index).ldn_read_access[i] + IBM_DS(host_index).ldn_write_access[i];
2375 return (a);
2376}
2377
2378static int ldn_access_total_inquiry(int host_index)
2379{
2380 int a;
2381 int i;
2382
2383 a = 0;
2384 for (i = 0; i <= MAX_LOG_DEV; i++)
2385 a += IBM_DS(host_index).ldn_inquiry_access[i];
2386 return (a);
2387}
2388
2389static int ldn_access_total_modeselect(int host_index)
2390{
2391 int a;
2392 int i;
2393
2394 a = 0;
2395 for (i = 0; i <= MAX_LOG_DEV; i++)
2396 a += IBM_DS(host_index).ldn_modeselect_access[i];
2397 return (a);
2398}
2399
2400/* routine to display info in the proc-fs-structure (a deluxe feature) */
2401static int ibmmca_proc_info(struct Scsi_Host *shpnt, char *buffer, char **start, off_t offset, int length, int inout)
2402{
2403 int len = 0;
2404 int i, id, lun, host_index;
2405 unsigned long flags;
2406 int max_pun;
2407
2408 for (i = 0; hosts[i] && hosts[i] != shpnt; i++);
2409
2410 spin_lock_irqsave(hosts[i]->host_lock, flags); /* Check it */
2411 host_index = i;
2412 if (!shpnt) {
a6becb08 2413 len += sprintf(buffer + len, "\nIBM MCA SCSI: Can't find adapter");
1da177e4
LT		 2414 return len;
2415 }
2416 max_pun = subsystem_maxid(host_index);
2417
2418 len += sprintf(buffer + len, "\n IBM-SCSI-Subsystem-Linux-Driver, Version %s\n\n\n", IBMMCA_SCSI_DRIVER_VERSION);
2419 len += sprintf(buffer + len, " SCSI Access-Statistics:\n");
2420 len += sprintf(buffer + len, " Device Scanning Order....: %s\n", (ibm_ansi_order) ? "IBM/ANSI" : "New Industry Standard");
2421#ifdef CONFIG_SCSI_MULTI_LUN
2422 len += sprintf(buffer + len, " Multiple LUN probing.....: Yes\n");
2423#else
2424 len += sprintf(buffer + len, " Multiple LUN probing.....: No\n");
2425#endif
2426 len += sprintf(buffer + len, " This Hostnumber..........: %d\n", shpnt->host_no);
2427 len += sprintf(buffer + len, " Base I/O-Port............: 0x%x\n", (unsigned int) (IM_CMD_REG(host_index)));
2428 len += sprintf(buffer + len, " (Shared) IRQ.............: %d\n", IM_IRQ);
2429 len += sprintf(buffer + len, " Total Interrupts.........: %d\n", IBM_DS(host_index).total_interrupts);
2430 len += sprintf(buffer + len, " Total SCSI Accesses......: %d\n", IBM_DS(host_index).total_accesses);
2431 len += sprintf(buffer + len, " Total short SCBs.........: %d\n", IBM_DS(host_index).scbs);
2432 len += sprintf(buffer + len, " Total long SCBs..........: %d\n", IBM_DS(host_index).long_scbs);
2433 len += sprintf(buffer + len, " Total SCSI READ/WRITE..: %d\n", ldn_access_total_read_write(host_index));
2434 len += sprintf(buffer + len, " Total SCSI Inquiries...: %d\n", ldn_access_total_inquiry(host_index));
2435 len += sprintf(buffer + len, " Total SCSI Modeselects.: %d\n", ldn_access_total_modeselect(host_index));
2436 len += sprintf(buffer + len, " Total SCSI other cmds..: %d\n", IBM_DS(host_index).total_accesses - ldn_access_total_read_write(host_index)
2437 - ldn_access_total_modeselect(host_index)
2438 - ldn_access_total_inquiry(host_index));
2439 len += sprintf(buffer + len, " Total SCSI command fails.: %d\n\n", IBM_DS(host_index).total_errors);
2440 len += sprintf(buffer + len, " Logical-Device-Number (LDN) Access-Statistics:\n");
2441 len += sprintf(buffer + len, " LDN | Accesses [%%] | READ | WRITE | ASSIGNMENTS\n");
2442 len += sprintf(buffer + len, " -----|--------------|-----------|-----------|--------------\n");
2443 for (i = 0; i <= MAX_LOG_DEV; i++)
2444 len += sprintf(buffer + len, " %2X | %3d | %8d | %8d | %8d\n", i, ldn_access_load(host_index, i), IBM_DS(host_index).ldn_read_access[i], IBM_DS(host_index).ldn_write_access[i], IBM_DS(host_index).ldn_assignments[i]);
2445 len += sprintf(buffer + len, " -----------------------------------------------------------\n\n");
2446 len += sprintf(buffer + len, " Dynamical-LDN-Assignment-Statistics:\n");
2447 len += sprintf(buffer + len, " Number of physical SCSI-devices..: %d (+ Adapter)\n", IBM_DS(host_index).total_scsi_devices);
2448 len += sprintf(buffer + len, " Dynamical Assignment necessary...: %s\n", IBM_DS(host_index).dyn_flag ? "Yes" : "No ");
2449 len += sprintf(buffer + len, " Next LDN to be assigned..........: 0x%x\n", next_ldn(host_index));
2450 len += sprintf(buffer + len, " Dynamical assignments done yet...: %d\n", IBM_DS(host_index).dynamical_assignments);
2451 len += sprintf(buffer + len, "\n Current SCSI-Device-Mapping:\n");
2452 len += sprintf(buffer + len, " Physical SCSI-Device Map Logical SCSI-Device Map\n");
2453 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");
2454 for (id = 0; id < max_pun; id++) {
2455 len += sprintf(buffer + len, " %2d ", id);
2456 for (lun = 0; lun < 8; lun++)
2457 len += sprintf(buffer + len, "%2s ", ti_p(get_scsi(host_index)[id][lun]));
2458 len += sprintf(buffer + len, " %2d ", id);
2459 for (lun = 0; lun < 8; lun++)
2460 len += sprintf(buffer + len, "%2s ", ti_l(get_ldn(host_index)[id][lun]));
2461 len += sprintf(buffer + len, "\n");
2462 }
2463
2464 len += sprintf(buffer + len, "(A = IBM-Subsystem, D = Harddisk, T = Tapedrive, P = Processor, W = WORM,\n");
2465 len += sprintf(buffer + len, " R = CD-ROM, S = Scanner, M = MO-Drive, C = Medium-Changer, + = unprovided LUN,\n");
2466 len += sprintf(buffer + len, " - = nothing found, nothing assigned or unprobed LUN)\n\n");
2467
2468 *start = buffer + offset;
2469 len -= offset;
2470 if (len > length)
2471 len = length;
2472 spin_unlock_irqrestore(shpnt->host_lock, flags);
2473 return len;
2474}
2475
2476static int option_setup(char *str)
2477{
2478 int ints[IM_MAX_HOSTS];
2479 char *cur = str;
2480 int i = 1;
2481
2482 while (cur && isdigit(*cur) && i <= IM_MAX_HOSTS) {
2483 ints[i++] = simple_strtoul(cur, NULL, 0);
2484 if ((cur = strchr(cur, ',')) != NULL)
2485 cur++;
2486 }
2487 ints[0] = i - 1;
2488 internal_ibmmca_scsi_setup(cur, ints);
9b41046c 2489 return 1;
1da177e4
LT		 2490}
2491
2492__setup("ibmmcascsi=", option_setup);
2493
d0be4a7d 2494static struct scsi_host_template driver_template = {
1da177e4
LT		 2495 .proc_name = "ibmmca",
2496 .proc_info = ibmmca_proc_info,
2497 .name = "IBM SCSI-Subsystem",
2498 .detect = ibmmca_detect,
2499 .release = ibmmca_release,
2500 .queuecommand = ibmmca_queuecommand,
2501 .eh_abort_handler = ibmmca_abort,
2502 .eh_host_reset_handler = ibmmca_host_reset,
2503 .bios_param = ibmmca_biosparam,
2504 .can_queue = 16,
2505 .this_id = 7,
2506 .sg_tablesize = 16,
2507 .cmd_per_lun = 1,
2508 .use_clustering = ENABLE_CLUSTERING,
2509};
2510#include "scsi_module.c"
Linux 6.x block layer and io_uring tree(s)