summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorThomas Schwinge <tschwinge@gnu.org>2006-10-08 13:32:36 +0000
committerThomas Schwinge <tschwinge@gnu.org>2009-06-18 00:26:42 +0200
commite5bfac069477a91c84a71f1f9a7c5175eb7d7cb3 (patch)
treeda6d400acbdfc89903d281d252e572c2c9eb135d
parentb8594ebf7409b550928bfc68b3018c9a160e6fe6 (diff)
2006-10-08 Thomas Schwinge <tschwinge@gnu.org>
* linux/dev/drivers/scsi/scsi.c: Remove file.
Diffstat
-rw-r--r--ChangeLog3
-rw-r--r--linux/dev/drivers/scsi/scsi.c3585
2 files changed, 2 insertions, 3586 deletions
diff --git a/ChangeLog b/ChangeLog
index 550d6e1..e965a3d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,7 +1,8 @@
2006-10-08 Thomas Schwinge <tschwinge@gnu.org>
* linux/dev/drivers/scsi/hosts.c: Remove file.
-
+ * linux/dev/drivers/scsi/scsi.c: Likewise.
+
* linux/dev/drivers/block/ide.c: Move file...
* linux/src/drivers/block/ide.c: ... here.
diff --git a/linux/dev/drivers/scsi/scsi.c b/linux/dev/drivers/scsi/scsi.c
deleted file mode 100644
index 4a821c0..0000000
--- a/linux/dev/drivers/scsi/scsi.c
+++ /dev/null
@@ -1,3585 +0,0 @@
-/*
- * scsi.c Copyright (C) 1992 Drew Eckhardt
- * Copyright (C) 1993, 1994, 1995 Eric Youngdale
- *
- * generic mid-level SCSI driver
- * Initial versions: Drew Eckhardt
- * Subsequent revisions: Eric Youngdale
- *
- * <drew@colorado.edu>
- *
- * Bug correction thanks go to :
- * Rik Faith <faith@cs.unc.edu>
- * Tommy Thorn <tthorn>
- * Thomas Wuensche <tw@fgb1.fgb.mw.tu-muenchen.de>
- *
- * Modified by Eric Youngdale eric@aib.com to
- * add scatter-gather, multiple outstanding request, and other
- * enhancements.
- *
- * Native multichannel, wide scsi, /proc/scsi and hot plugging
- * support added by Michael Neuffer <mike@i-connect.net>
- *
- * Added request_module("scsi_hostadapter") for kerneld:
- * (Put an "alias scsi_hostadapter your_hostadapter" in /etc/conf.modules)
- * Bjorn Ekwall <bj0rn@blox.se>
- *
- * Major improvements to the timeout, abort, and reset processing,
- * as well as performance modifications for large queue depths by
- * Leonard N. Zubkoff <lnz@dandelion.com>
- */
-
-/*
- * Don't import our own symbols, as this would severely mess up our
- * symbol tables.
- */
-#define _SCSI_SYMS_VER_
-
-#include <linux/config.h>
-#include <linux/module.h>
-
-#include <linux/sched.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/malloc.h>
-#include <linux/ioport.h>
-#include <linux/kernel.h>
-#include <linux/stat.h>
-#include <linux/blk.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
-
-#include <asm/system.h>
-#include <asm/irq.h>
-#include <asm/dma.h>
-
-#include "scsi.h"
-#include "hosts.h"
-#include "constants.h"
-
-#ifdef CONFIG_KERNELD
-#include <linux/kerneld.h>
-#endif
-
-#undef USE_STATIC_SCSI_MEMORY
-
-/*
-static const char RCSid[] = "$Header: cvs/gnumach/linux/dev/drivers/scsi/Attic/scsi.c,v 1.1 1999/04/26 05:44:26 tb Exp $";
-*/
-
-
-/* Command groups 3 and 4 are reserved and should never be used. */
-const unsigned char scsi_command_size[8] = { 6, 10, 10, 12, 12, 12, 10, 10 };
-
-#define INTERNAL_ERROR (panic ("Internal error in file %s, line %d.\n", __FILE__, __LINE__))
-
-/*
- * PAGE_SIZE must be a multiple of the sector size (512). True
- * for all reasonably recent architectures (even the VAX...).
- */
-#define SECTOR_SIZE 512
-#define SECTORS_PER_PAGE (PAGE_SIZE/SECTOR_SIZE)
-
-#if SECTORS_PER_PAGE <= 8
- typedef unsigned char FreeSectorBitmap;
-#elif SECTORS_PER_PAGE <= 32
- typedef unsigned int FreeSectorBitmap;
-#else
-# error You lose.
-#endif
-
-static void scsi_done (Scsi_Cmnd *SCpnt);
-static int update_timeout (Scsi_Cmnd *, int);
-static void print_inquiry(unsigned char *data);
-static void scsi_times_out (Scsi_Cmnd * SCpnt);
-static int scan_scsis_single (int channel,int dev,int lun,int * max_scsi_dev ,
- int * sparse_lun, Scsi_Device ** SDpnt, Scsi_Cmnd * SCpnt,
- struct Scsi_Host *shpnt, char * scsi_result);
-void scsi_build_commandblocks(Scsi_Device * SDpnt);
-
-#ifdef CONFIG_MODULES
-extern struct symbol_table scsi_symbol_table;
-#endif
-
-static FreeSectorBitmap * dma_malloc_freelist = NULL;
-static int scsi_need_isa_bounce_buffers;
-static unsigned int dma_sectors = 0;
-unsigned int dma_free_sectors = 0;
-unsigned int need_isa_buffer = 0;
-static unsigned char ** dma_malloc_pages = NULL;
-
-static int time_start;
-static int time_elapsed;
-static volatile struct Scsi_Host * host_active = NULL;
-#define SCSI_BLOCK(HOST) ((HOST->block && host_active && HOST != host_active) \
- || (HOST->can_queue && HOST->host_busy >= HOST->can_queue))
-
-const char *const scsi_device_types[MAX_SCSI_DEVICE_CODE] =
-{
- "Direct-Access ",
- "Sequential-Access",
- "Printer ",
- "Processor ",
- "WORM ",
- "CD-ROM ",
- "Scanner ",
- "Optical Device ",
- "Medium Changer ",
- "Communications "
-};
-
-
-/*
- * global variables :
- * scsi_devices an array of these specifying the address for each
- * (host, id, LUN)
- */
-
-Scsi_Device * scsi_devices = NULL;
-
-/* Process ID of SCSI commands */
-unsigned long scsi_pid = 0;
-
-static unsigned long serial_number = 0;
-
-static unsigned char generic_sense[6] = {REQUEST_SENSE, 0,0,0, 255, 0};
-static void resize_dma_pool(void);
-
-/* This variable is merely a hook so that we can debug the kernel with gdb. */
-Scsi_Cmnd * last_cmnd = NULL;
-
-/* This is the pointer to the /proc/scsi code.
- * It is only initialized to !=0 if the scsi code is present
- */
-#if CONFIG_PROC_FS
-extern int (* dispatch_scsi_info_ptr)(int ino, char *buffer, char **start,
- off_t offset, int length, int inout);
-extern int dispatch_scsi_info(int ino, char *buffer, char **start,
- off_t offset, int length, int inout);
-
-struct proc_dir_entry proc_scsi_scsi = {
- PROC_SCSI_SCSI, 4, "scsi",
- S_IFREG | S_IRUGO | S_IWUSR, 1, 0, 0, 0,
- NULL,
- NULL, NULL,
- NULL, NULL, NULL
-};
-#endif
-
-/*
- * This is the number of clock ticks we should wait before we time out
- * and abort the command. This is for where the scsi.c module generates
- * the command, not where it originates from a higher level, in which
- * case the timeout is specified there.
- *
- * ABORT_TIMEOUT and RESET_TIMEOUT are the timeouts for RESET and ABORT
- * respectively.
- */
-
-#ifdef DEBUG_TIMEOUT
-static void scsi_dump_status(void);
-#endif
-
-
-#ifdef DEBUG
- #define SCSI_TIMEOUT (5*HZ)
-#else
- #define SCSI_TIMEOUT (2*HZ)
-#endif
-
-#ifdef DEBUG
- #define SENSE_TIMEOUT SCSI_TIMEOUT
- #define ABORT_TIMEOUT SCSI_TIMEOUT
- #define RESET_TIMEOUT SCSI_TIMEOUT
-#else
- #define SENSE_TIMEOUT (5*HZ/10)
- #define RESET_TIMEOUT (5*HZ/10)
- #define ABORT_TIMEOUT (5*HZ/10)
-#endif
-
-#define MIN_RESET_DELAY (2*HZ)
-
-/* Do not call reset on error if we just did a reset within 15 sec. */
-#define MIN_RESET_PERIOD (15*HZ)
-
-/* The following devices are known not to tolerate a lun != 0 scan for
- * one reason or another. Some will respond to all luns, others will
- * lock up.
- */
-
-#define BLIST_NOLUN 0x01
-#define BLIST_FORCELUN 0x02
-#define BLIST_BORKEN 0x04
-#define BLIST_KEY 0x08
-#define BLIST_SINGLELUN 0x10
-#define BLIST_NOTQ 0x20
-#define BLIST_SPARSELUN 0x40
-#define BLIST_MAX5LUN 0x80
-
-struct dev_info{
- const char * vendor;
- const char * model;
- const char * revision; /* Latest revision known to be bad. Not used yet */
- unsigned flags;
-};
-
-/*
- * This is what was previously known as the blacklist. The concept
- * has been expanded so that we can specify other types of things we
- * need to be aware of.
- */
-static struct dev_info device_list[] =
-{
-{"TEAC","CD-R55S","1.0H", BLIST_NOLUN}, /* Locks up if polled for lun != 0 */
-{"CHINON","CD-ROM CDS-431","H42", BLIST_NOLUN}, /* Locks up if polled for lun != 0 */
-{"CHINON","CD-ROM CDS-535","Q14", BLIST_NOLUN}, /* Locks up if polled for lun != 0 */
-{"DENON","DRD-25X","V", BLIST_NOLUN}, /* Locks up if probed for lun != 0 */
-{"HITACHI","DK312C","CM81", BLIST_NOLUN}, /* Responds to all lun - dtg */
-{"HITACHI","DK314C","CR21" , BLIST_NOLUN}, /* responds to all lun */
-{"IMS", "CDD521/10","2.06", BLIST_NOLUN}, /* Locks-up when LUN>0 polled. */
-{"MAXTOR","XT-3280","PR02", BLIST_NOLUN}, /* Locks-up when LUN>0 polled. */
-{"MAXTOR","XT-4380S","B3C", BLIST_NOLUN}, /* Locks-up when LUN>0 polled. */
-{"MAXTOR","MXT-1240S","I1.2", BLIST_NOLUN}, /* Locks up when LUN>0 polled */
-{"MAXTOR","XT-4170S","B5A", BLIST_NOLUN}, /* Locks-up sometimes when LUN>0 polled. */
-{"MAXTOR","XT-8760S","B7B", BLIST_NOLUN}, /* guess what? */
-{"MEDIAVIS","RENO CD-ROMX2A","2.03",BLIST_NOLUN},/*Responds to all lun */
-{"MICROP", "4110", "*", BLIST_NOTQ}, /* Buggy Tagged Queuing */
-{"NEC","CD-ROM DRIVE:841","1.0", BLIST_NOLUN}, /* Locks-up when LUN>0 polled. */
-{"RODIME","RO3000S","2.33", BLIST_NOLUN}, /* Locks up if polled for lun != 0 */
-{"SANYO", "CRD-250S", "1.20", BLIST_NOLUN}, /* causes failed REQUEST SENSE on lun 1
- * for aha152x controller, which causes
- * SCSI code to reset bus.*/
-{"SEAGATE", "ST157N", "\004|j", BLIST_NOLUN}, /* causes failed REQUEST SENSE on lun 1
- * for aha152x controller, which causes
- * SCSI code to reset bus.*/
-{"SEAGATE", "ST296","921", BLIST_NOLUN}, /* Responds to all lun */
-{"SEAGATE","ST1581","6538",BLIST_NOLUN}, /* Responds to all lun */
-{"SONY","CD-ROM CDU-541","4.3d", BLIST_NOLUN},
-{"SONY","CD-ROM CDU-55S","1.0i", BLIST_NOLUN},
-{"SONY","CD-ROM CDU-561","1.7x", BLIST_NOLUN},
-{"TANDBERG","TDC 3600","U07", BLIST_NOLUN}, /* Locks up if polled for lun != 0 */
-{"TEAC","CD-ROM","1.06", BLIST_NOLUN}, /* causes failed REQUEST SENSE on lun 1
- * for seagate controller, which causes
- * SCSI code to reset bus.*/
-{"TEXEL","CD-ROM","1.06", BLIST_NOLUN}, /* causes failed REQUEST SENSE on lun 1
- * for seagate controller, which causes
- * SCSI code to reset bus.*/
-{"QUANTUM","LPS525S","3110", BLIST_NOLUN}, /* Locks sometimes if polled for lun != 0 */
-{"QUANTUM","PD1225S","3110", BLIST_NOLUN}, /* Locks sometimes if polled for lun != 0 */
-{"MEDIAVIS","CDR-H93MV","1.31", BLIST_NOLUN}, /* Locks up if polled for lun != 0 */
-{"SANKYO", "CP525","6.64", BLIST_NOLUN}, /* causes failed REQ SENSE, extra reset */
-{"HP", "C1750A", "3226", BLIST_NOLUN}, /* scanjet iic */
-{"HP", "C1790A", "", BLIST_NOLUN}, /* scanjet iip */
-{"HP", "C2500A", "", BLIST_NOLUN}, /* scanjet iicx */
-
-/*
- * Other types of devices that have special flags.
- */
-{"SONY","CD-ROM CDU-8001","*", BLIST_BORKEN},
-{"TEXEL","CD-ROM","1.06", BLIST_BORKEN},
-{"IOMEGA","Io20S *F","*", BLIST_KEY},
-{"INSITE","Floptical F*8I","*", BLIST_KEY},
-{"INSITE","I325VM","*", BLIST_KEY},
-{"NRC","MBR-7","*", BLIST_FORCELUN | BLIST_SINGLELUN},
-{"NRC","MBR-7.4","*", BLIST_FORCELUN | BLIST_SINGLELUN},
-{"REGAL","CDC-4X","*", BLIST_MAX5LUN | BLIST_SINGLELUN},
-{"NAKAMICH","MJ-4.8S","*", BLIST_FORCELUN | BLIST_SINGLELUN},
-{"NAKAMICH","MJ-5.16S","*", BLIST_FORCELUN | BLIST_SINGLELUN},
-{"PIONEER","CD-ROM DRM-600","*", BLIST_FORCELUN | BLIST_SINGLELUN},
-{"PIONEER","CD-ROM DRM-602X","*", BLIST_FORCELUN | BLIST_SINGLELUN},
-{"PIONEER","CD-ROM DRM-604X","*", BLIST_FORCELUN | BLIST_SINGLELUN},
-{"EMULEX","MD21/S2 ESDI","*", BLIST_SINGLELUN},
-{"CANON","IPUBJD","*", BLIST_SPARSELUN},
-{"MATSHITA","PD","*", BLIST_FORCELUN | BLIST_SINGLELUN},
-{"YAMAHA","CDR100","1.00", BLIST_NOLUN}, /* Locks up if polled for lun != 0 */
-{"YAMAHA","CDR102","1.00", BLIST_NOLUN}, /* Locks up if polled for lun != 0 */
-{"nCipher","Fastness Crypto","*", BLIST_FORCELUN},
-/*
- * Must be at end of list...
- */
-{NULL, NULL, NULL}
-};
-
-static int get_device_flags(unsigned char * response_data){
- int i = 0;
- unsigned char * pnt;
- for(i=0; 1; i++){
- if(device_list[i].vendor == NULL) return 0;
- pnt = &response_data[8];
- while(*pnt && *pnt == ' ') pnt++;
- if(memcmp(device_list[i].vendor, pnt,
- strlen(device_list[i].vendor))) continue;
- pnt = &response_data[16];
- while(*pnt && *pnt == ' ') pnt++;
- if(memcmp(device_list[i].model, pnt,
- strlen(device_list[i].model))) continue;
- return device_list[i].flags;
- }
- return 0;
-}
-
-void scsi_make_blocked_list(void) {
- int block_count = 0, index;
- unsigned long flags;
- struct Scsi_Host * sh[128], * shpnt;
-
- /*
- * Create a circular linked list from the scsi hosts which have
- * the "wish_block" field in the Scsi_Host structure set.
- * The blocked list should include all the scsi hosts using ISA DMA.
- * In some systems, using two dma channels simultaneously causes
- * unpredictable results.
- * Among the scsi hosts in the blocked list, only one host at a time
- * is allowed to have active commands queued. The transition from
- * one active host to the next one is allowed only when host_busy == 0
- * for the active host (which implies host_busy == 0 for all the hosts
- * in the list). Moreover for block devices the transition to a new
- * active host is allowed only when a request is completed, since a
- * block device request can be divided into multiple scsi commands
- * (when there are few sg lists or clustering is disabled).
- *
- * (DB, 4 Feb 1995)
- */
-
- save_flags(flags);
- cli();
- host_active = NULL;
-
- for(shpnt=scsi_hostlist; shpnt; shpnt = shpnt->next) {
-
-#if 0
- /*
- * Is this is a candidate for the blocked list?
- * Useful to put into the blocked list all the hosts whose driver
- * does not know about the host->block feature.
- */
- if (shpnt->unchecked_isa_dma) shpnt->wish_block = 1;
-#endif
-
- if (shpnt->wish_block) sh[block_count++] = shpnt;
- }
-
- if (block_count == 1) sh[0]->block = NULL;
-
- else if (block_count > 1) {
-
- for(index = 0; index < block_count - 1; index++) {
- sh[index]->block = sh[index + 1];
- printk("scsi%d : added to blocked host list.\n",
- sh[index]->host_no);
- }
-
- sh[block_count - 1]->block = sh[0];
- printk("scsi%d : added to blocked host list.\n",
- sh[index]->host_no);
- }
-
- restore_flags(flags);
-}
-
-static void scan_scsis_done (Scsi_Cmnd * SCpnt)
-{
-
-#ifdef DEBUG
- printk ("scan_scsis_done(%p, %06x)\n", SCpnt->host, SCpnt->result);
-#endif
- SCpnt->request.rq_status = RQ_SCSI_DONE;
-
- if (SCpnt->request.sem != NULL)
- up(SCpnt->request.sem);
-}
-
-#ifdef CONFIG_SCSI_MULTI_LUN
-static int max_scsi_luns = 8;
-#else
-static int max_scsi_luns = 1;
-#endif
-
-void scsi_luns_setup(char *str, int *ints) {
- if (ints[0] != 1)
- printk("scsi_luns_setup : usage max_scsi_luns=n (n should be between 1 and 8)\n");
- else
- max_scsi_luns = ints[1];
-}
-
-/*
- * Detecting SCSI devices :
- * We scan all present host adapter's busses, from ID 0 to ID (max_id).
- * We use the INQUIRY command, determine device type, and pass the ID /
- * lun address of all sequential devices to the tape driver, all random
- * devices to the disk driver.
- */
-static void scan_scsis (struct Scsi_Host *shpnt, unchar hardcoded,
- unchar hchannel, unchar hid, unchar hlun)
-{
- int dev, lun, channel;
- unsigned char scsi_result0[256];
- unsigned char *scsi_result;
- Scsi_Device *SDpnt;
- int max_dev_lun, sparse_lun;
- Scsi_Cmnd *SCpnt;
-
- SCpnt = (Scsi_Cmnd *) scsi_init_malloc (sizeof (Scsi_Cmnd), GFP_ATOMIC | GFP_DMA);
- SDpnt = (Scsi_Device *) scsi_init_malloc (sizeof (Scsi_Device), GFP_ATOMIC);
- memset (SCpnt, 0, sizeof (Scsi_Cmnd));
-
-
- /* Make sure we have something that is valid for DMA purposes */
- scsi_result = ( ( !shpnt->unchecked_isa_dma )
- ? &scsi_result0[0] : scsi_init_malloc (512, GFP_DMA));
-
- if (scsi_result == NULL) {
- printk ("Unable to obtain scsi_result buffer\n");
- goto leave;
- }
-
- /* We must chain ourself in the host_queue, so commands can time out */
- if(shpnt->host_queue)
- shpnt->host_queue->prev = SCpnt;
- SCpnt->next = shpnt->host_queue;
- SCpnt->prev = NULL;
- shpnt->host_queue = SCpnt;
-
-
- if (hardcoded == 1) {
- Scsi_Device *oldSDpnt=SDpnt;
- struct Scsi_Device_Template * sdtpnt;
- channel = hchannel;
- if(channel > shpnt->max_channel) goto leave;
- dev = hid;
- if(dev >= shpnt->max_id) goto leave;
- lun = hlun;
- if(lun >= shpnt->max_lun) goto leave;
- scan_scsis_single (channel, dev, lun, &max_dev_lun, &sparse_lun,
- &SDpnt, SCpnt, shpnt, scsi_result);
- if(SDpnt!=oldSDpnt) {
-
- /* it could happen the blockdevice hasn't yet been inited */
- for(sdtpnt = scsi_devicelist; sdtpnt; sdtpnt = sdtpnt->next)
- if(sdtpnt->init && sdtpnt->dev_noticed) (*sdtpnt->init)();
-
- oldSDpnt->scsi_request_fn = NULL;
- for(sdtpnt = scsi_devicelist; sdtpnt; sdtpnt = sdtpnt->next)
- if(sdtpnt->attach) {
- (*sdtpnt->attach)(oldSDpnt);
- if(oldSDpnt->attached) scsi_build_commandblocks(oldSDpnt);}
- resize_dma_pool();
-
- for(sdtpnt = scsi_devicelist; sdtpnt; sdtpnt = sdtpnt->next) {
- if(sdtpnt->finish && sdtpnt->nr_dev)
- {(*sdtpnt->finish)();}
- }
- }
-
- }
- else {
- for (channel = 0; channel <= shpnt->max_channel; channel++) {
- for (dev = 0; dev < shpnt->max_id; ++dev) {
- if (shpnt->this_id != dev) {
-
- /*
- * We need the for so our continue, etc. work fine. We put this in
- * a variable so that we can override it during the scan if we
- * detect a device *KNOWN* to have multiple logical units.
- */
- max_dev_lun = (max_scsi_luns < shpnt->max_lun ?
- max_scsi_luns : shpnt->max_lun);
- sparse_lun = 0;
- for (lun = 0; lun < max_dev_lun; ++lun) {
- if (!scan_scsis_single (channel, dev, lun, &max_dev_lun,
- &sparse_lun, &SDpnt, SCpnt, shpnt,
- scsi_result)
- && !sparse_lun)
- break; /* break means don't probe further for luns!=0 */
- } /* for lun ends */
- } /* if this_id != id ends */
- } /* for dev ends */
- } /* for channel ends */
- } /* if/else hardcoded */
-
- leave:
-
- {/* Unchain SCpnt from host_queue */
- Scsi_Cmnd *prev, *next, *hqptr;
- for(hqptr = shpnt->host_queue; hqptr != SCpnt; hqptr = hqptr->next) ;
- if(hqptr) {
- prev = hqptr->prev;
- next = hqptr->next;
- if(prev)
- prev->next = next;
- else
- shpnt->host_queue = next;
- if(next) next->prev = prev;
- }
- }
-
- /* Last device block does not exist. Free memory. */
- if (SDpnt != NULL)
- scsi_init_free ((char *) SDpnt, sizeof (Scsi_Device));
-
- if (SCpnt != NULL)
- scsi_init_free ((char *) SCpnt, sizeof (Scsi_Cmnd));
-
- /* If we allocated a buffer so we could do DMA, free it now */
- if (scsi_result != &scsi_result0[0] && scsi_result != NULL)
- scsi_init_free (scsi_result, 512);
-
-}
-
-/*
- * The worker for scan_scsis.
- * Returning 0 means Please don't ask further for lun!=0, 1 means OK go on.
- * Global variables used : scsi_devices(linked list)
- */
-int scan_scsis_single (int channel, int dev, int lun, int *max_dev_lun,
- int *sparse_lun, Scsi_Device **SDpnt2, Scsi_Cmnd * SCpnt,
- struct Scsi_Host * shpnt, char *scsi_result)
-{
- unsigned char scsi_cmd[12];
- struct Scsi_Device_Template *sdtpnt;
- Scsi_Device * SDtail, *SDpnt=*SDpnt2;
- int bflags, type=-1;
-
- SDtail = scsi_devices;
- if (scsi_devices)
- while (SDtail->next)
- SDtail = SDtail->next;
-
- memset (SDpnt, 0, sizeof (Scsi_Device));
- SDpnt->host = shpnt;
- SDpnt->id = dev;
- SDpnt->lun = lun;
- SDpnt->channel = channel;
-
- /* Some low level driver could use device->type (DB) */
- SDpnt->type = -1;
-
- /*
- * Assume that the device will have handshaking problems, and then fix this
- * field later if it turns out it doesn't
- */
- SDpnt->borken = 1;
- SDpnt->was_reset = 0;
- SDpnt->expecting_cc_ua = 0;
-
- scsi_cmd[0] = TEST_UNIT_READY;
- scsi_cmd[1] = lun << 5;
- scsi_cmd[2] = scsi_cmd[3] = scsi_cmd[4] = scsi_cmd[5] = 0;
-
- SCpnt->host = SDpnt->host;
- SCpnt->device = SDpnt;
- SCpnt->target = SDpnt->id;
- SCpnt->lun = SDpnt->lun;
- SCpnt->channel = SDpnt->channel;
- {
- struct semaphore sem = MUTEX_LOCKED;
- SCpnt->request.sem = &sem;
- SCpnt->request.rq_status = RQ_SCSI_BUSY;
- scsi_do_cmd (SCpnt, (void *) scsi_cmd,
- (void *) scsi_result,
- 256, scan_scsis_done, SCSI_TIMEOUT + 4 * HZ, 5);
- down (&sem);
- }
-
-#if defined(DEBUG) || defined(DEBUG_INIT)
- printk ("scsi: scan_scsis_single id %d lun %d. Return code 0x%08x\n",
- dev, lun, SCpnt->result);
- print_driverbyte(SCpnt->result); print_hostbyte(SCpnt->result);
- printk("\n");
-#endif
-
- if (SCpnt->result) {
- if (((driver_byte (SCpnt->result) & DRIVER_SENSE) ||
- (status_byte (SCpnt->result) & CHECK_CONDITION)) &&
- ((SCpnt->sense_buffer[0] & 0x70) >> 4) == 7) {
- if (((SCpnt->sense_buffer[2] & 0xf) != NOT_READY) &&
- ((SCpnt->sense_buffer[2] & 0xf) != UNIT_ATTENTION) &&
- ((SCpnt->sense_buffer[2] & 0xf) != ILLEGAL_REQUEST || lun > 0))
- return 1;
- }
- else
- return 0;
- }
-
-#if defined (DEBUG) || defined(DEBUG_INIT)
- printk ("scsi: performing INQUIRY\n");
-#endif
- /*
- * Build an INQUIRY command block.
- */
- scsi_cmd[0] = INQUIRY;
- scsi_cmd[1] = (lun << 5) & 0xe0;
- scsi_cmd[2] = 0;
- scsi_cmd[3] = 0;
- scsi_cmd[4] = 255;
- scsi_cmd[5] = 0;
- SCpnt->cmd_len = 0;
- {
- struct semaphore sem = MUTEX_LOCKED;
- SCpnt->request.sem = &sem;
- SCpnt->request.rq_status = RQ_SCSI_BUSY;
- scsi_do_cmd (SCpnt, (void *) scsi_cmd,
- (void *) scsi_result,
- 256, scan_scsis_done, SCSI_TIMEOUT, 3);
- down (&sem);
- }
-
-#if defined(DEBUG) || defined(DEBUG_INIT)
- printk ("scsi: INQUIRY %s with code 0x%x\n",
- SCpnt->result ? "failed" : "successful", SCpnt->result);
-#endif
-
- if (SCpnt->result)
- return 0; /* assume no peripheral if any sort of error */
-
- /*
- * Check the peripheral qualifier field - this tells us whether LUNS
- * are supported here or not.
- */
- if( (scsi_result[0] >> 5) == 3 )
- {
- return 0; /* assume no peripheral if any sort of error */
- }
-
- /*
- * It would seem some TOSHIBA CDROM gets things wrong
- */
- if (!strncmp (scsi_result + 8, "TOSHIBA", 7) &&
- !strncmp (scsi_result + 16, "CD-ROM", 6) &&
- scsi_result[0] == TYPE_DISK) {
- scsi_result[0] = TYPE_ROM;
- scsi_result[1] |= 0x80; /* removable */
- }
-
- if (!strncmp (scsi_result + 8, "NEC", 3)) {
- if (!strncmp (scsi_result + 16, "CD-ROM DRIVE:84 ", 16) ||
- !strncmp (scsi_result + 16, "CD-ROM DRIVE:25", 15))
- SDpnt->manufacturer = SCSI_MAN_NEC_OLDCDR;
- else
- SDpnt->manufacturer = SCSI_MAN_NEC;
- }
- else if (!strncmp (scsi_result + 8, "TOSHIBA", 7))
- SDpnt->manufacturer = SCSI_MAN_TOSHIBA;
- else if (!strncmp (scsi_result + 8, "SONY", 4))
- SDpnt->manufacturer = SCSI_MAN_SONY;
- else if (!strncmp (scsi_result + 8, "PIONEER", 7))
- SDpnt->manufacturer = SCSI_MAN_PIONEER;
- else
- SDpnt->manufacturer = SCSI_MAN_UNKNOWN;
-
- memcpy (SDpnt->vendor, scsi_result + 8, 8);
- memcpy (SDpnt->model, scsi_result + 16, 16);
- memcpy (SDpnt->rev, scsi_result + 32, 4);
-
- SDpnt->removable = (0x80 & scsi_result[1]) >> 7;
- SDpnt->lockable = SDpnt->removable;
- SDpnt->changed = 0;
- SDpnt->access_count = 0;
- SDpnt->busy = 0;
- SDpnt->has_cmdblocks = 0;
- /*
- * Currently, all sequential devices are assumed to be tapes, all random
- * devices disk, with the appropriate read only flags set for ROM / WORM
- * treated as RO.
- */
- switch (type = (scsi_result[0] & 0x1f)) {
- case TYPE_TAPE:
- case TYPE_DISK:
- case TYPE_MOD:
- case TYPE_PROCESSOR:
- case TYPE_SCANNER:
- case TYPE_MEDIUM_CHANGER:
- SDpnt->writeable = 1;
- break;
- case TYPE_WORM:
- case TYPE_ROM:
- SDpnt->writeable = 0;
- break;
- default:
- printk ("scsi: unknown type %d\n", type);
- }
-
- SDpnt->single_lun = 0;
- SDpnt->soft_reset =
- (scsi_result[7] & 1) && ((scsi_result[3] & 7) == 2);
- SDpnt->random = (type == TYPE_TAPE) ? 0 : 1;
- SDpnt->type = (type & 0x1f);
-
- print_inquiry (scsi_result);
-
- for (sdtpnt = scsi_devicelist; sdtpnt;
- sdtpnt = sdtpnt->next)
- if (sdtpnt->detect)
- SDpnt->attached +=
- (*sdtpnt->detect) (SDpnt);
-
- SDpnt->scsi_level = scsi_result[2] & 0x07;
- if (SDpnt->scsi_level >= 2 ||
- (SDpnt->scsi_level == 1 &&
- (scsi_result[3] & 0x0f) == 1))
- SDpnt->scsi_level++;
-
- /*
- * Accommodate drivers that want to sleep when they should be in a polling
- * loop.
- */
- SDpnt->disconnect = 0;
-
- /*
- * Get any flags for this device.
- */
- bflags = get_device_flags (scsi_result);
-
- /*
- * Set the tagged_queue flag for SCSI-II devices that purport to support
- * tagged queuing in the INQUIRY data.
- */
- SDpnt->tagged_queue = 0;
- if ((SDpnt->scsi_level >= SCSI_2) &&
- (scsi_result[7] & 2) &&
- !(bflags & BLIST_NOTQ)) {
- SDpnt->tagged_supported = 1;
- SDpnt->current_tag = 0;
- }
-
- /*
- * Some revisions of the Texel CD ROM drives have handshaking problems when
- * used with the Seagate controllers. Before we know what type of device
- * we're talking to, we assume it's borken and then change it here if it
- * turns out that it isn't a TEXEL drive.
- */
- if ((bflags & BLIST_BORKEN) == 0)
- SDpnt->borken = 0;
-
- /*
- * If we want to only allow I/O to one of the luns attached to this device
- * at a time, then we set this flag.
- */
- if (bflags & BLIST_SINGLELUN)
- SDpnt->single_lun = 1;
-
- /*
- * These devices need this "key" to unlock the devices so we can use it
- */
- if ((bflags & BLIST_KEY) != 0) {
- printk ("Unlocked floptical drive.\n");
- SDpnt->lockable = 0;
- scsi_cmd[0] = MODE_SENSE;
- scsi_cmd[1] = (lun << 5) & 0xe0;
- scsi_cmd[2] = 0x2e;
- scsi_cmd[3] = 0;
- scsi_cmd[4] = 0x2a;
- scsi_cmd[5] = 0;
- SCpnt->cmd_len = 0;
- {
- struct semaphore sem = MUTEX_LOCKED;
- SCpnt->request.rq_status = RQ_SCSI_BUSY;
- SCpnt->request.sem = &sem;
- scsi_do_cmd (SCpnt, (void *) scsi_cmd,
- (void *) scsi_result, 0x2a,
- scan_scsis_done, SCSI_TIMEOUT, 3);
- down (&sem);
- }
- }
- /* Add this device to the linked list at the end */
- if (SDtail)
- SDtail->next = SDpnt;
- else
- scsi_devices = SDpnt;
- SDtail = SDpnt;
-
- SDpnt = (Scsi_Device *) scsi_init_malloc (sizeof (Scsi_Device), GFP_ATOMIC);
- *SDpnt2=SDpnt;
- if (!SDpnt)
- printk ("scsi: scan_scsis_single: Cannot malloc\n");
-
-
- /*
- * Some scsi devices cannot be polled for lun != 0 due to firmware bugs
- */
- if (bflags & BLIST_NOLUN)
- return 0; /* break; */
-
- /*
- * If this device is known to support sparse multiple units, override the
- * other settings, and scan all of them.
- */
- if (bflags & BLIST_SPARSELUN) {
- *max_dev_lun = 8;
- *sparse_lun = 1;
- return 1;
- }
-
- /*
- * If this device is known to support multiple units, override the other
- * settings, and scan all of them.
- */
- if (bflags & BLIST_FORCELUN) {
- *max_dev_lun = 8;
- return 1;
- }
-
- /*
- * REGAL CDC-4X: avoid hang after LUN 4
- */
- if (bflags & BLIST_MAX5LUN) {
- *max_dev_lun = 5;
- return 1;
- }
-
- /*
- * We assume the device can't handle lun!=0 if: - it reports scsi-0 (ANSI
- * SCSI Revision 0) (old drives like MAXTOR XT-3280) or - it reports scsi-1
- * (ANSI SCSI Revision 1) and Response Data Format 0
- */
- if (((scsi_result[2] & 0x07) == 0)
- ||
- ((scsi_result[2] & 0x07) == 1 &&
- (scsi_result[3] & 0x0f) == 0))
- return 0;
- return 1;
-}
-
-/*
- * Flag bits for the internal_timeout array
- */
-#define NORMAL_TIMEOUT 0
-#define IN_ABORT 1
-#define IN_RESET 2
-#define IN_RESET2 4
-#define IN_RESET3 8
-
-/*
- * This is our time out function, called when the timer expires for a
- * given host adapter. It will attempt to abort the currently executing
- * command, that failing perform a kernel panic.
- */
-
-static void scsi_times_out (Scsi_Cmnd * SCpnt)
-{
-
- switch (SCpnt->internal_timeout & (IN_ABORT | IN_RESET | IN_RESET2 | IN_RESET3))
- {
- case NORMAL_TIMEOUT:
- {
-#ifdef DEBUG_TIMEOUT
- scsi_dump_status();
-#endif
- }
-
- if (!scsi_abort (SCpnt, DID_TIME_OUT))
- return;
- case IN_ABORT:
- printk("SCSI host %d abort (pid %ld) timed out - resetting\n",
- SCpnt->host->host_no, SCpnt->pid);
- if (!scsi_reset (SCpnt, SCSI_RESET_ASYNCHRONOUS))
- return;
- case IN_RESET:
- case (IN_ABORT | IN_RESET):
- /* This might be controversial, but if there is a bus hang,
- * you might conceivably want the machine up and running
- * esp if you have an ide disk.
- */
- printk("SCSI host %d channel %d reset (pid %ld) timed out - "
- "trying harder\n",
- SCpnt->host->host_no, SCpnt->channel, SCpnt->pid);
- SCpnt->internal_timeout &= ~IN_RESET;
- SCpnt->internal_timeout |= IN_RESET2;
- scsi_reset (SCpnt,
- SCSI_RESET_ASYNCHRONOUS | SCSI_RESET_SUGGEST_BUS_RESET);
- return;
- case IN_RESET2:
- case (IN_ABORT | IN_RESET2):
- /* Obviously the bus reset didn't work.
- * Let's try even harder and call for an HBA reset.
- * Maybe the HBA itself crashed and this will shake it loose.
- */
- printk("SCSI host %d reset (pid %ld) timed out - trying to shake it loose\n",
- SCpnt->host->host_no, SCpnt->pid);
- SCpnt->internal_timeout &= ~(IN_RESET | IN_RESET2);
- SCpnt->internal_timeout |= IN_RESET3;
- scsi_reset (SCpnt,
- SCSI_RESET_ASYNCHRONOUS | SCSI_RESET_SUGGEST_HOST_RESET);
- return;
-
- default:
- printk("SCSI host %d reset (pid %ld) timed out again -\n",
- SCpnt->host->host_no, SCpnt->pid);
- printk("probably an unrecoverable SCSI bus or device hang.\n");
- return;
-
- }
-
-}
-
-
-/* This function takes a quick look at a request, and decides if it
- * can be queued now, or if there would be a stall while waiting for
- * something else to finish. This routine assumes that interrupts are
- * turned off when entering the routine. It is the responsibility
- * of the calling code to ensure that this is the case.
- */
-
-Scsi_Cmnd * request_queueable (struct request * req, Scsi_Device * device)
-{
- Scsi_Cmnd * SCpnt = NULL;
- int tablesize;
- Scsi_Cmnd * found = NULL;
- struct buffer_head * bh, *bhp;
-
- if (!device)
- panic ("No device passed to request_queueable().\n");
-
- if (req && req->rq_status == RQ_INACTIVE)
- panic("Inactive in request_queueable");
-
- /*
- * Look for a free command block. If we have been instructed not to queue
- * multiple commands to multi-lun devices, then check to see what else is
- * going for this device first.
- */
-
- if (!device->single_lun) {
- SCpnt = device->device_queue;
- while(SCpnt){
- if(SCpnt->request.rq_status == RQ_INACTIVE) break;
- SCpnt = SCpnt->device_next;
- }
- } else {
- SCpnt = device->host->host_queue;
- while(SCpnt){
- if(SCpnt->channel == device->channel
- && SCpnt->target == device->id) {
- if (SCpnt->lun == device->lun) {
- if(found == NULL
- && SCpnt->request.rq_status == RQ_INACTIVE)
- {
- found=SCpnt;
- }
- }
- if(SCpnt->request.rq_status != RQ_INACTIVE) {
- /*
- * I think that we should really limit things to one
- * outstanding command per device - this is what tends
- * to trip up buggy firmware.
- */
- return NULL;
- }
- }
- SCpnt = SCpnt->next;
- }
- SCpnt = found;
- }
-
- if (!SCpnt) return NULL;
-
- if (SCSI_BLOCK(device->host)) return NULL;
-
- if (req) {
- memcpy(&SCpnt->request, req, sizeof(struct request));
- tablesize = device->host->sg_tablesize;
- bhp = bh = req->bh;
- if(!tablesize) bh = NULL;
- /* Take a quick look through the table to see how big it is.
- * We already have our copy of req, so we can mess with that
- * if we want to.
- */
- while(req->nr_sectors && bh){
- bhp = bhp->b_reqnext;
- if(!bhp || !CONTIGUOUS_BUFFERS(bh,bhp)) tablesize--;
- req->nr_sectors -= bh->b_size >> 9;
- req->sector += bh->b_size >> 9;
- if(!tablesize) break;
- bh = bhp;
- }
- if(req->nr_sectors && bh && bh->b_reqnext){ /* Any leftovers? */
- SCpnt->request.bhtail = bh;
- req->bh = bh->b_reqnext; /* Divide request */
- bh->b_reqnext = NULL;
- bh = req->bh;
-
- /* Now reset things so that req looks OK */
- SCpnt->request.nr_sectors -= req->nr_sectors;
- req->current_nr_sectors = bh->b_size >> 9;
- req->buffer = bh->b_data;
- SCpnt->request.sem = NULL; /* Wait until whole thing done */
- } else {
- req->rq_status = RQ_INACTIVE;
- wake_up(&wait_for_request);
- }
- } else {
- SCpnt->request.rq_status = RQ_SCSI_BUSY; /* Busy, but no request */
- SCpnt->request.sem = NULL; /* And no one is waiting for the device
- * either */
- }
-
- SCpnt->use_sg = 0; /* Reset the scatter-gather flag */
- SCpnt->old_use_sg = 0;
- SCpnt->transfersize = 0;
- SCpnt->underflow = 0;
- SCpnt->cmd_len = 0;
-
-/* Since not everyone seems to set the device info correctly
- * before Scsi_Cmnd gets send out to scsi_do_command, we do it here.
- */
- SCpnt->channel = device->channel;
- SCpnt->lun = device->lun;
- SCpnt->target = device->id;
-
- return SCpnt;
-}
-
-/* This function returns a structure pointer that will be valid for
- * the device. The wait parameter tells us whether we should wait for
- * the unit to become free or not. We are also able to tell this routine
- * not to return a descriptor if the host is unable to accept any more
- * commands for the time being. We need to keep in mind that there is no
- * guarantee that the host remain not busy. Keep in mind the
- * request_queueable function also knows the internal allocation scheme
- * of the packets for each device
- */
-
-Scsi_Cmnd * allocate_device (struct request ** reqp, Scsi_Device * device,
- int wait)
-{
- kdev_t dev;
- struct request * req = NULL;
- int tablesize;
- unsigned long flags;
- struct buffer_head * bh, *bhp;
- struct Scsi_Host * host;
- Scsi_Cmnd * SCpnt = NULL;
- Scsi_Cmnd * SCwait = NULL;
- Scsi_Cmnd * found = NULL;
-
- if (!device)
- panic ("No device passed to allocate_device().\n");
-
- if (reqp) req = *reqp;
-
- /* See if this request has already been queued by an interrupt routine */
- if (req) {
- if(req->rq_status == RQ_INACTIVE) return NULL;
- dev = req->rq_dev;
- } else
- dev = 0; /* unused */
-
- host = device->host;
-
- if (intr_count && SCSI_BLOCK(host)) return NULL;
-
- while (1==1){
- if (!device->single_lun) {
- SCpnt = device->device_queue;
- while(SCpnt){
- SCwait = SCpnt;
- if(SCpnt->request.rq_status == RQ_INACTIVE) break;
- SCpnt = SCpnt->device_next;
- }
- } else {
- SCpnt = device->host->host_queue;
- while(SCpnt){
- if(SCpnt->channel == device->channel
- && SCpnt->target == device->id) {
- if (SCpnt->lun == device->lun) {
- SCwait = SCpnt;
- if(found == NULL
- && SCpnt->request.rq_status == RQ_INACTIVE)
- {
- found=SCpnt;
- }
- }
- if(SCpnt->request.rq_status != RQ_INACTIVE) {
- /*
- * I think that we should really limit things to one
- * outstanding command per device - this is what tends
- * to trip up buggy firmware.
- */
- found = NULL;
- break;
- }
- }
- SCpnt = SCpnt->next;
- }
- SCpnt = found;
- }
-
- save_flags(flags);
- cli();
- /* See if this request has already been queued by an interrupt routine
- */
- if (req && (req->rq_status == RQ_INACTIVE || req->rq_dev != dev)) {
- restore_flags(flags);
- return NULL;
- }
- if (!SCpnt || SCpnt->request.rq_status != RQ_INACTIVE) /* Might have changed */
- {
-#if 1 /* NEW CODE */
- if (wait && SCwait && SCwait->request.rq_status != RQ_INACTIVE){
- sleep_on(&device->device_wait);
- restore_flags(flags);
- } else {
- restore_flags(flags);
- if (!wait) return NULL;
- if (!SCwait) {
- printk("Attempt to allocate device channel %d,"
- " target %d, lun %d\n", device->channel,
- device->id, device->lun);
- panic("No device found in allocate_device\n");
- }
- }
-#else /* ORIGINAL CODE */
- restore_flags(flags);
- if(!wait) return NULL;
- if (!SCwait) {
- printk("Attempt to allocate device channel %d, target"
- " %d, lun %d\n", device->channel, device->id,
- device->lun);
- panic("No device found in allocate_device\n");
- }
- SCSI_SLEEP(&device->device_wait,
- (SCwait->request.rq_status != RQ_INACTIVE));
-#endif
- } else {
- if (req) {
- memcpy(&SCpnt->request, req, sizeof(struct request));
- tablesize = device->host->sg_tablesize;
- bhp = bh = req->bh;
- if(!tablesize) bh = NULL;
- /* Take a quick look through the table to see how big it is.
- * We already have our copy of req, so we can mess with that
- * if we want to.
- */
- while(req->nr_sectors && bh){
- bhp = bhp->b_reqnext;
- if(!bhp || !CONTIGUOUS_BUFFERS(bh,bhp)) tablesize--;
- req->nr_sectors -= bh->b_size >> 9;
- req->sector += bh->b_size >> 9;
- if(!tablesize) break;
- bh = bhp;
- }
- if(req->nr_sectors && bh && bh->b_reqnext){/* Any leftovers? */
- SCpnt->request.bhtail = bh;
- req->bh = bh->b_reqnext; /* Divide request */
- bh->b_reqnext = NULL;
- bh = req->bh;
- /* Now reset things so that req looks OK */
- SCpnt->request.nr_sectors -= req->nr_sectors;
- req->current_nr_sectors = bh->b_size >> 9;
- req->buffer = bh->b_data;
- SCpnt->request.sem = NULL; /* Wait until whole thing done*/
- }
- else
- {
- req->rq_status = RQ_INACTIVE;
- *reqp = req->next;
- wake_up(&wait_for_request);
- }
- } else {
- SCpnt->request.rq_status = RQ_SCSI_BUSY;
- SCpnt->request.sem = NULL; /* And no one is waiting for this
- * to complete */
- }
- restore_flags(flags);
- break;
- }
- }
-
- SCpnt->use_sg = 0; /* Reset the scatter-gather flag */
- SCpnt->old_use_sg = 0;
- SCpnt->transfersize = 0; /* No default transfer size */
- SCpnt->cmd_len = 0;
-
- SCpnt->underflow = 0; /* Do not flag underflow conditions */
-
- /* Since not everyone seems to set the device info correctly
- * before Scsi_Cmnd gets send out to scsi_do_command, we do it here.
- */
- SCpnt->channel = device->channel;
- SCpnt->lun = device->lun;
- SCpnt->target = device->id;
-
- return SCpnt;
-}
-
-/*
- * This is inline because we have stack problemes if we recurse to deeply.
- */
-
-inline void internal_cmnd (Scsi_Cmnd * SCpnt)
-{
- unsigned long flags, timeout;
- struct Scsi_Host * host;
-#ifdef DEBUG_DELAY
- unsigned long clock;
-#endif
-
-#if DEBUG
- unsigned long *ret = 0;
-#ifdef __mips__
- __asm__ __volatile__ ("move\t%0,$31":"=r"(ret));
-#else
- ret = __builtin_return_address(0);
-#endif
-#endif
-
- host = SCpnt->host;
-
- save_flags(flags);
- cli();
- /* Assign a unique nonzero serial_number. */
- if (++serial_number == 0) serial_number = 1;
- SCpnt->serial_number = serial_number;
-
- /*
- * We will wait MIN_RESET_DELAY clock ticks after the last reset so
- * we can avoid the drive not being ready.
- */
- timeout = host->last_reset + MIN_RESET_DELAY;
- if (jiffies < timeout) {
- int ticks_remaining = timeout - jiffies;
- /*
- * NOTE: This may be executed from within an interrupt
- * handler! This is bad, but for now, it'll do. The irq
- * level of the interrupt handler has been masked out by the
- * platform dependent interrupt handling code already, so the
- * sti() here will not cause another call to the SCSI host's
- * interrupt handler (assuming there is one irq-level per
- * host).
- */
- sti();
- while (--ticks_remaining >= 0) udelay(1000000/HZ);
- host->last_reset = jiffies - MIN_RESET_DELAY;
- }
- restore_flags(flags);
-
- update_timeout(SCpnt, SCpnt->timeout_per_command);
-
- /*
- * We will use a queued command if possible, otherwise we will emulate the
- * queuing and calling of completion function ourselves.
- */
-#ifdef DEBUG
- printk("internal_cmnd (host = %d, channel = %d, target = %d, "
- "command = %p, buffer = %p, \nbufflen = %d, done = %p)\n",
- SCpnt->host->host_no, SCpnt->channel, SCpnt->target, SCpnt->cmnd,
- SCpnt->buffer, SCpnt->bufflen, SCpnt->done);
-#endif
-
- if (host->can_queue)
- {
-#ifdef DEBUG
- printk("queuecommand : routine at %p\n",
- host->hostt->queuecommand);
-#endif
- /* This locking tries to prevent all sorts of races between
- * queuecommand and the interrupt code. In effect,
- * we are only allowed to be in queuecommand once at
- * any given time, and we can only be in the interrupt
- * handler and the queuecommand function at the same time
- * when queuecommand is called while servicing the
- * interrupt.
- */
-
- if(!intr_count && SCpnt->host->irq)
- disable_irq(SCpnt->host->irq);
-
- host->hostt->queuecommand (SCpnt, scsi_done);
-
- if(!intr_count && SCpnt->host->irq)
- enable_irq(SCpnt->host->irq);
- }
- else
- {
- int temp;
-
-#ifdef DEBUG
- printk("command() : routine at %p\n", host->hostt->command);
-#endif
- temp = host->hostt->command (SCpnt);
- SCpnt->result = temp;
-#ifdef DEBUG_DELAY
- clock = jiffies + 4 * HZ;
- while (jiffies < clock) barrier();
- printk("done(host = %d, result = %04x) : routine at %p\n",
- host->host_no, temp, host->hostt->command);
-#endif
- scsi_done(SCpnt);
- }
-#ifdef DEBUG
- printk("leaving internal_cmnd()\n");
-#endif
-}
-
-static void scsi_request_sense (Scsi_Cmnd * SCpnt)
-{
- unsigned long flags;
-
- save_flags(flags);
- cli();
- SCpnt->flags |= WAS_SENSE | ASKED_FOR_SENSE;
- update_timeout(SCpnt, SENSE_TIMEOUT);
- restore_flags(flags);
-
-
- memcpy ((void *) SCpnt->cmnd , (void *) generic_sense,
- sizeof(generic_sense));
-
- SCpnt->cmnd[1] = SCpnt->lun << 5;
- SCpnt->cmnd[4] = sizeof(SCpnt->sense_buffer);
-
- SCpnt->request_buffer = &SCpnt->sense_buffer;
- SCpnt->request_bufflen = sizeof(SCpnt->sense_buffer);
- SCpnt->use_sg = 0;
- SCpnt->cmd_len = COMMAND_SIZE(SCpnt->cmnd[0]);
- internal_cmnd (SCpnt);
-}
-
-
-
-/*
- * scsi_do_cmd sends all the commands out to the low-level driver. It
- * handles the specifics required for each low level driver - ie queued
- * or non queued. It also prevents conflicts when different high level
- * drivers go for the same host at the same time.
- */
-
-void scsi_do_cmd (Scsi_Cmnd * SCpnt, const void *cmnd ,
- void *buffer, unsigned bufflen, void (*done)(Scsi_Cmnd *),
- int timeout, int retries)
-{
- unsigned long flags;
- struct Scsi_Host * host = SCpnt->host;
-
-#ifdef DEBUG
- {
- int i;
- int target = SCpnt->target;
- printk ("scsi_do_cmd (host = %d, channel = %d target = %d, "
- "buffer =%p, bufflen = %d, done = %p, timeout = %d, "
- "retries = %d)\n"
- "command : " , host->host_no, SCpnt->channel, target, buffer,
- bufflen, done, timeout, retries);
- for (i = 0; i < 10; ++i)
- printk ("%02x ", ((unsigned char *) cmnd)[i]);
- printk("\n");
- }
-#endif
-
- if (!host)
- {
- panic ("Invalid or not present host.\n");
- }
-
-
- /*
- * We must prevent reentrancy to the lowlevel host driver. This prevents
- * it - we enter a loop until the host we want to talk to is not busy.
- * Race conditions are prevented, as interrupts are disabled in between the
- * time we check for the host being not busy, and the time we mark it busy
- * ourselves.
- */
-
- save_flags(flags);
- cli();
- SCpnt->pid = scsi_pid++;
-
- while (SCSI_BLOCK(host)) {
- restore_flags(flags);
- SCSI_SLEEP(&host->host_wait, SCSI_BLOCK(host));
- cli();
- }
-
- if (host->block) host_active = host;
-
- host->host_busy++;
- restore_flags(flags);
-
- /*
- * Our own function scsi_done (which marks the host as not busy, disables
- * the timeout counter, etc) will be called by us or by the
- * scsi_hosts[host].queuecommand() function needs to also call
- * the completion function for the high level driver.
- */
-
- memcpy ((void *) SCpnt->data_cmnd , (const void *) cmnd, 12);
-#if 0
- SCpnt->host = host;
- SCpnt->channel = channel;
- SCpnt->target = target;
- SCpnt->lun = (SCpnt->data_cmnd[1] >> 5);
-#endif
- SCpnt->reset_chain = NULL;
- SCpnt->serial_number = 0;
- SCpnt->bufflen = bufflen;
- SCpnt->buffer = buffer;
- SCpnt->flags = 0;
- SCpnt->retries = 0;
- SCpnt->allowed = retries;
- SCpnt->done = done;
- SCpnt->timeout_per_command = timeout;
-
- memcpy ((void *) SCpnt->cmnd , (const void *) cmnd, 12);
- /* Zero the sense buffer. Some host adapters automatically request
- * sense on error. 0 is not a valid sense code.
- */
- memset ((void *) SCpnt->sense_buffer, 0, sizeof SCpnt->sense_buffer);
- SCpnt->request_buffer = buffer;
- SCpnt->request_bufflen = bufflen;
- SCpnt->old_use_sg = SCpnt->use_sg;
- if (SCpnt->cmd_len == 0)
- SCpnt->cmd_len = COMMAND_SIZE(SCpnt->cmnd[0]);
- SCpnt->old_cmd_len = SCpnt->cmd_len;
-
- /* Start the timer ticking. */
-
- SCpnt->internal_timeout = NORMAL_TIMEOUT;
- SCpnt->abort_reason = 0;
- internal_cmnd (SCpnt);
-
-#ifdef DEBUG
- printk ("Leaving scsi_do_cmd()\n");
-#endif
-}
-
-static int check_sense (Scsi_Cmnd * SCpnt)
-{
- /* If there is no sense information, request it. If we have already
- * requested it, there is no point in asking again - the firmware must
- * be confused.
- */
- if (((SCpnt->sense_buffer[0] & 0x70) >> 4) != 7) {
- if(!(SCpnt->flags & ASKED_FOR_SENSE))
- return SUGGEST_SENSE;
- else
- return SUGGEST_RETRY;
- }
-
- SCpnt->flags &= ~ASKED_FOR_SENSE;
-
-#ifdef DEBUG_INIT
- printk("scsi%d, channel%d : ", SCpnt->host->host_no, SCpnt->channel);
- print_sense("", SCpnt);
- printk("\n");
-#endif
- if (SCpnt->sense_buffer[2] & 0xe0)
- return SUGGEST_ABORT;
-
- switch (SCpnt->sense_buffer[2] & 0xf)
- {
- case NO_SENSE:
- return 0;
- case RECOVERED_ERROR:
- return SUGGEST_IS_OK;
-
- case ABORTED_COMMAND:
- return SUGGEST_RETRY;
- case NOT_READY:
- case UNIT_ATTENTION:
- /*
- * If we are expecting a CC/UA because of a bus reset that we
- * performed, treat this just as a retry. Otherwise this is
- * information that we should pass up to the upper-level driver
- * so that we can deal with it there.
- */
- if( SCpnt->device->expecting_cc_ua )
- {
- SCpnt->device->expecting_cc_ua = 0;
- return SUGGEST_RETRY;
- }
- return SUGGEST_ABORT;
-
- /* these three are not supported */
- case COPY_ABORTED:
- case VOLUME_OVERFLOW:
- case MISCOMPARE:
-
- case MEDIUM_ERROR:
- return SUGGEST_REMAP;
- case BLANK_CHECK:
- case DATA_PROTECT:
- case HARDWARE_ERROR:
- case ILLEGAL_REQUEST:
- default:
- return SUGGEST_ABORT;
- }
-}
-
-/* This function is the mid-level interrupt routine, which decides how
- * to handle error conditions. Each invocation of this function must
- * do one and *only* one of the following:
- *
- * (1) Call last_cmnd[host].done. This is done for fatal errors and
- * normal completion, and indicates that the handling for this
- * request is complete.
- * (2) Call internal_cmnd to requeue the command. This will result in
- * scsi_done being called again when the retry is complete.
- * (3) Call scsi_request_sense. This asks the host adapter/drive for
- * more information about the error condition. When the information
- * is available, scsi_done will be called again.
- * (4) Call reset(). This is sort of a last resort, and the idea is that
- * this may kick things loose and get the drive working again. reset()
- * automatically calls scsi_request_sense, and thus scsi_done will be
- * called again once the reset is complete.
- *
- * If none of the above actions are taken, the drive in question
- * will hang. If more than one of the above actions are taken by
- * scsi_done, then unpredictable behavior will result.
- */
-static void scsi_done (Scsi_Cmnd * SCpnt)
-{
- int status=0;
- int exit=0;
- int checked;
- int oldto;
- struct Scsi_Host * host = SCpnt->host;
- int result = SCpnt->result;
- SCpnt->serial_number = 0;
- oldto = update_timeout(SCpnt, 0);
-
-#ifdef DEBUG_TIMEOUT
- if(result) printk("Non-zero result in scsi_done %x %d:%d\n",
- result, SCpnt->target, SCpnt->lun);
-#endif
-
- /* If we requested an abort, (and we got it) then fix up the return
- * status to say why
- */
- if(host_byte(result) == DID_ABORT && SCpnt->abort_reason)
- SCpnt->result = result = (result & 0xff00ffff) |
- (SCpnt->abort_reason << 16);
-
-
-#define FINISHED 0
-#define MAYREDO 1
-#define REDO 3
-#define PENDING 4
-
-#ifdef DEBUG
- printk("In scsi_done(host = %d, result = %06x)\n", host->host_no, result);
-#endif
-
- if(SCpnt->flags & WAS_SENSE)
- {
- SCpnt->use_sg = SCpnt->old_use_sg;
- SCpnt->cmd_len = SCpnt->old_cmd_len;
- }
-
- switch (host_byte(result))
- {
- case DID_OK:
- if (status_byte(result) && (SCpnt->flags & WAS_SENSE))
- /* Failed to obtain sense information */
- {
- SCpnt->flags &= ~WAS_SENSE;
-#if 0 /* This cannot possibly be correct. */
- SCpnt->internal_timeout &= ~SENSE_TIMEOUT;
-#endif
-
- if (!(SCpnt->flags & WAS_RESET))
- {
- printk("scsi%d : channel %d target %d lun %d request sense"
- " failed, performing reset.\n",
- SCpnt->host->host_no, SCpnt->channel, SCpnt->target,
- SCpnt->lun);
- scsi_reset(SCpnt, SCSI_RESET_SYNCHRONOUS);
- return;
- }
- else
- {
- exit = (DRIVER_HARD | SUGGEST_ABORT);
- status = FINISHED;
- }
- }
- else switch(msg_byte(result))
- {
- case COMMAND_COMPLETE:
- switch (status_byte(result))
- {
- case GOOD:
- if (SCpnt->flags & WAS_SENSE)
- {
-#ifdef DEBUG
- printk ("In scsi_done, GOOD status, COMMAND COMPLETE, "
- "parsing sense information.\n");
-#endif
- SCpnt->flags &= ~WAS_SENSE;
-#if 0 /* This cannot possibly be correct. */
- SCpnt->internal_timeout &= ~SENSE_TIMEOUT;
-#endif
-
- switch (checked = check_sense(SCpnt))
- {
- case SUGGEST_SENSE:
- case 0:
-#ifdef DEBUG
- printk("NO SENSE. status = REDO\n");
-#endif
- update_timeout(SCpnt, oldto);
- status = REDO;
- break;
- case SUGGEST_IS_OK:
- break;
- case SUGGEST_REMAP:
-#ifdef DEBUG
- printk("SENSE SUGGEST REMAP - status = FINISHED\n");
-#endif
- status = FINISHED;
- exit = DRIVER_SENSE | SUGGEST_ABORT;
- break;
- case SUGGEST_RETRY:
-#ifdef DEBUG
- printk("SENSE SUGGEST RETRY - status = MAYREDO\n");
-#endif
- status = MAYREDO;
- exit = DRIVER_SENSE | SUGGEST_RETRY;
- break;
- case SUGGEST_ABORT:
-#ifdef DEBUG
- printk("SENSE SUGGEST ABORT - status = FINISHED");
-#endif
- status = FINISHED;
- exit = DRIVER_SENSE | SUGGEST_ABORT;
- break;
- default:
- printk ("Internal error %s %d \n", __FILE__,
- __LINE__);
- }
- } /* end WAS_SENSE */
- else
- {
-#ifdef DEBUG
- printk("COMMAND COMPLETE message returned, "
- "status = FINISHED. \n");
-#endif
- exit = DRIVER_OK;
- status = FINISHED;
- }
- break;
-
- case CHECK_CONDITION:
- case COMMAND_TERMINATED:
- switch (check_sense(SCpnt))
- {
- case 0:
- update_timeout(SCpnt, oldto);
- status = REDO;
- break;
- case SUGGEST_REMAP:
- status = FINISHED;
- exit = DRIVER_SENSE | SUGGEST_ABORT;
- break;
- case SUGGEST_RETRY:
- status = MAYREDO;
- exit = DRIVER_SENSE | SUGGEST_RETRY;
- break;
- case SUGGEST_ABORT:
- status = FINISHED;
- exit = DRIVER_SENSE | SUGGEST_ABORT;
- break;
- case SUGGEST_SENSE:
- scsi_request_sense (SCpnt);
- status = PENDING;
- break;
- }
- break;
-
- case CONDITION_GOOD:
- case INTERMEDIATE_GOOD:
- case INTERMEDIATE_C_GOOD:
- break;
-
- case BUSY:
- case QUEUE_FULL:
- update_timeout(SCpnt, oldto);
- status = REDO;
- break;
-
- case RESERVATION_CONFLICT:
- printk("scsi%d, channel %d : RESERVATION CONFLICT performing"
- " reset.\n", SCpnt->host->host_no, SCpnt->channel);
- scsi_reset(SCpnt, SCSI_RESET_SYNCHRONOUS);
- return;
-#if 0
- exit = DRIVER_SOFT | SUGGEST_ABORT;
- status = MAYREDO;
- break;
-#endif
- default:
- printk ("Internal error %s %d \n"
- "status byte = %d \n", __FILE__,
- __LINE__, status_byte(result));
-
- }
- break;
- default:
- panic("scsi: unsupported message byte %d received\n",
- msg_byte(result));
- }
- break;
- case DID_TIME_OUT:
-#ifdef DEBUG
- printk("Host returned DID_TIME_OUT - ");
-#endif
-
- if (SCpnt->flags & WAS_TIMEDOUT)
- {
-#ifdef DEBUG
- printk("Aborting\n");
-#endif
- /*
- Allow TEST_UNIT_READY and INQUIRY commands to timeout early
- without causing resets. All other commands should be retried.
- */
- if (SCpnt->cmnd[0] != TEST_UNIT_READY &&
- SCpnt->cmnd[0] != INQUIRY)
- status = MAYREDO;
- exit = (DRIVER_TIMEOUT | SUGGEST_ABORT);
- }
- else
- {
-#ifdef DEBUG
- printk ("Retrying.\n");
-#endif
- SCpnt->flags |= WAS_TIMEDOUT;
- SCpnt->internal_timeout &= ~IN_ABORT;
- status = REDO;
- }
- break;
- case DID_BUS_BUSY:
- case DID_PARITY:
- status = REDO;
- break;
- case DID_NO_CONNECT:
-#ifdef DEBUG
- printk("Couldn't connect.\n");
-#endif
- exit = (DRIVER_HARD | SUGGEST_ABORT);
- break;
- case DID_ERROR:
- status = MAYREDO;
- exit = (DRIVER_HARD | SUGGEST_ABORT);
- break;
- case DID_BAD_TARGET:
- case DID_ABORT:
- exit = (DRIVER_INVALID | SUGGEST_ABORT);
- break;
- case DID_RESET:
- if (SCpnt->flags & IS_RESETTING)
- {
- SCpnt->flags &= ~IS_RESETTING;
- status = REDO;
- break;
- }
-
- if(msg_byte(result) == GOOD &&
- status_byte(result) == CHECK_CONDITION) {
- switch (check_sense(SCpnt)) {
- case 0:
- update_timeout(SCpnt, oldto);
- status = REDO;
- break;
- case SUGGEST_REMAP:
- case SUGGEST_RETRY:
- status = MAYREDO;
- exit = DRIVER_SENSE | SUGGEST_RETRY;
- break;
- case SUGGEST_ABORT:
- status = FINISHED;
- exit = DRIVER_SENSE | SUGGEST_ABORT;
- break;
- case SUGGEST_SENSE:
- scsi_request_sense (SCpnt);
- status = PENDING;
- break;
- }
- } else {
- status=REDO;
- exit = SUGGEST_RETRY;
- }
- break;
- default :
- exit = (DRIVER_ERROR | SUGGEST_DIE);
- }
-
- switch (status)
- {
- case FINISHED:
- case PENDING:
- break;
- case MAYREDO:
-#ifdef DEBUG
- printk("In MAYREDO, allowing %d retries, have %d\n",
- SCpnt->allowed, SCpnt->retries);
-#endif
- if ((++SCpnt->retries) < SCpnt->allowed)
- {
- if ((SCpnt->retries >= (SCpnt->allowed >> 1))
- && !(SCpnt->host->last_reset > 0 &&
- jiffies < SCpnt->host->last_reset + MIN_RESET_PERIOD)
- && !(SCpnt->flags & WAS_RESET))
- {
- printk("scsi%d channel %d : resetting for second half of retries.\n",
- SCpnt->host->host_no, SCpnt->channel);
- scsi_reset(SCpnt, SCSI_RESET_SYNCHRONOUS);
- break;
- }
-
- }
- else
- {
- status = FINISHED;
- break;
- }
- /* fall through to REDO */
-
- case REDO:
-
- if (SCpnt->flags & WAS_SENSE)
- scsi_request_sense(SCpnt);
- else
- {
- memcpy ((void *) SCpnt->cmnd,
- (void*) SCpnt->data_cmnd,
- sizeof(SCpnt->data_cmnd));
- SCpnt->request_buffer = SCpnt->buffer;
- SCpnt->request_bufflen = SCpnt->bufflen;
- SCpnt->use_sg = SCpnt->old_use_sg;
- SCpnt->cmd_len = SCpnt->old_cmd_len;
- internal_cmnd (SCpnt);
- }
- break;
- default:
- INTERNAL_ERROR;
- }
-
- if (status == FINISHED) {
-#ifdef DEBUG
- printk("Calling done function - at address %p\n", SCpnt->done);
-#endif
- host->host_busy--; /* Indicate that we are free */
-
- if (host->block && host->host_busy == 0) {
- host_active = NULL;
-
- /* For block devices "wake_up" is done in end_scsi_request */
- if (MAJOR(SCpnt->request.rq_dev) != SCSI_DISK_MAJOR &&
- MAJOR(SCpnt->request.rq_dev) != SCSI_CDROM_MAJOR) {
- struct Scsi_Host * next;
-
- for (next = host->block; next != host; next = next->block)
- wake_up(&next->host_wait);
- }
-
- }
-
- wake_up(&host->host_wait);
- SCpnt->result = result | ((exit & 0xff) << 24);
- SCpnt->use_sg = SCpnt->old_use_sg;
- SCpnt->cmd_len = SCpnt->old_cmd_len;
- SCpnt->done (SCpnt);
- }
-
-#undef FINISHED
-#undef REDO
-#undef MAYREDO
-#undef PENDING
-}
-
-/*
- * The scsi_abort function interfaces with the abort() function of the host
- * we are aborting, and causes the current command to not complete. The
- * caller should deal with any error messages or status returned on the
- * next call.
- *
- * This will not be called reentrantly for a given host.
- */
-
-/*
- * Since we're nice guys and specified that abort() and reset()
- * can be non-reentrant. The internal_timeout flags are used for
- * this.
- */
-
-
-int scsi_abort (Scsi_Cmnd * SCpnt, int why)
-{
- int oldto;
- unsigned long flags;
- struct Scsi_Host * host = SCpnt->host;
-
- while(1)
- {
- save_flags(flags);
- cli();
-
- /*
- * Protect against races here. If the command is done, or we are
- * on a different command forget it.
- */
- if (SCpnt->serial_number != SCpnt->serial_number_at_timeout) {
- restore_flags(flags);
- return 0;
- }
-
- if (SCpnt->internal_timeout & IN_ABORT)
- {
- restore_flags(flags);
- while (SCpnt->internal_timeout & IN_ABORT)
- barrier();
- }
- else
- {
- SCpnt->internal_timeout |= IN_ABORT;
- oldto = update_timeout(SCpnt, ABORT_TIMEOUT);
-
- if ((SCpnt->flags & IS_RESETTING) && SCpnt->device->soft_reset) {
- /* OK, this command must have died when we did the
- * reset. The device itself must have lied.
- */
- printk("Stale command on %d %d:%d appears to have died when"
- " the bus was reset\n",
- SCpnt->channel, SCpnt->target, SCpnt->lun);
- }
-
- restore_flags(flags);
- if (!host->host_busy) {
- SCpnt->internal_timeout &= ~IN_ABORT;
- update_timeout(SCpnt, oldto);
- return 0;
- }
- printk("scsi : aborting command due to timeout : pid %lu, scsi%d,"
- " channel %d, id %d, lun %d ",
- SCpnt->pid, SCpnt->host->host_no, (int) SCpnt->channel,
- (int) SCpnt->target, (int) SCpnt->lun);
- print_command (SCpnt->cmnd);
- if (SCpnt->serial_number != SCpnt->serial_number_at_timeout)
- return 0;
- SCpnt->abort_reason = why;
- switch(host->hostt->abort(SCpnt)) {
- /* We do not know how to abort. Try waiting another
- * time increment and see if this helps. Set the
- * WAS_TIMEDOUT flag set so we do not try this twice
- */
- case SCSI_ABORT_BUSY: /* Tough call - returning 1 from
- * this is too severe
- */
- case SCSI_ABORT_SNOOZE:
- if(why == DID_TIME_OUT) {
- save_flags(flags);
- cli();
- SCpnt->internal_timeout &= ~IN_ABORT;
- if(SCpnt->flags & WAS_TIMEDOUT) {
- restore_flags(flags);
- return 1; /* Indicate we cannot handle this.
- * We drop down into the reset handler
- * and try again
- */
- } else {
- SCpnt->flags |= WAS_TIMEDOUT;
- oldto = SCpnt->timeout_per_command;
- update_timeout(SCpnt, oldto);
- }
- restore_flags(flags);
- }
- return 0;
- case SCSI_ABORT_PENDING:
- if(why != DID_TIME_OUT) {
- save_flags(flags);
- cli();
- update_timeout(SCpnt, oldto);
- restore_flags(flags);
- }
- return 0;
- case SCSI_ABORT_SUCCESS:
- /* We should have already aborted this one. No
- * need to adjust timeout
- */
- SCpnt->internal_timeout &= ~IN_ABORT;
- return 0;
- case SCSI_ABORT_NOT_RUNNING:
- SCpnt->internal_timeout &= ~IN_ABORT;
- update_timeout(SCpnt, 0);
- return 0;
- case SCSI_ABORT_ERROR:
- default:
- SCpnt->internal_timeout &= ~IN_ABORT;
- return 1;
- }
- }
- }
-}
-
-
-/* Mark a single SCSI Device as having been reset. */
-
-static inline void scsi_mark_device_reset(Scsi_Device *Device)
-{
- Device->was_reset = 1;
- Device->expecting_cc_ua = 1;
-}
-
-
-/* Mark all SCSI Devices on a specific Host as having been reset. */
-
-void scsi_mark_host_reset(struct Scsi_Host *Host)
-{
- Scsi_Cmnd *SCpnt;
- for (SCpnt = Host->host_queue; SCpnt; SCpnt = SCpnt->next)
- scsi_mark_device_reset(SCpnt->device);
-}
-
-
-/* Mark all SCSI Devices on a specific Host Bus as having been reset. */
-
-void scsi_mark_bus_reset(struct Scsi_Host *Host, int channel)
-{
- Scsi_Cmnd *SCpnt;
- for (SCpnt = Host->host_queue; SCpnt; SCpnt = SCpnt->next)
- if (SCpnt->channel == channel)
- scsi_mark_device_reset(SCpnt->device);
-}
-
-
-int scsi_reset (Scsi_Cmnd * SCpnt, unsigned int reset_flags)
-{
- int temp;
- unsigned long flags;
- Scsi_Cmnd * SCpnt1;
- struct Scsi_Host * host = SCpnt->host;
-
- printk("SCSI bus is being reset for host %d channel %d.\n",
- host->host_no, SCpnt->channel);
-
-#if 0
- /*
- * First of all, we need to make a recommendation to the low-level
- * driver as to whether a BUS_DEVICE_RESET should be performed,
- * or whether we should do a full BUS_RESET. There is no simple
- * algorithm here - we basically use a series of heuristics
- * to determine what we should do.
- */
- SCpnt->host->suggest_bus_reset = FALSE;
-
- /*
- * First see if all of the active devices on the bus have
- * been jammed up so that we are attempting resets. If so,
- * then suggest a bus reset. Forcing a bus reset could
- * result in some race conditions, but no more than
- * you would usually get with timeouts. We will cross
- * that bridge when we come to it.
- *
- * This is actually a pretty bad idea, since a sequence of
- * commands will often timeout together and this will cause a
- * Bus Device Reset followed immediately by a SCSI Bus Reset.
- * If all of the active devices really are jammed up, the
- * Bus Device Reset will quickly timeout and scsi_times_out
- * will follow up with a SCSI Bus Reset anyway.
- */
- SCpnt1 = host->host_queue;
- while(SCpnt1) {
- if( SCpnt1->request.rq_status != RQ_INACTIVE
- && (SCpnt1->flags & (WAS_RESET | IS_RESETTING)) == 0 )
- break;
- SCpnt1 = SCpnt1->next;
- }
- if( SCpnt1 == NULL ) {
- reset_flags |= SCSI_RESET_SUGGEST_BUS_RESET;
- }
-
- /*
- * If the code that called us is suggesting a hard reset, then
- * definitely request it. This usually occurs because a
- * BUS_DEVICE_RESET times out.
- *
- * Passing reset_flags along takes care of this automatically.
- */
- if( reset_flags & SCSI_RESET_SUGGEST_BUS_RESET ) {
- SCpnt->host->suggest_bus_reset = TRUE;
- }
-#endif
-
- while (1) {
- save_flags(flags);
- cli();
-
- /*
- * Protect against races here. If the command is done, or we are
- * on a different command forget it.
- */
- if (reset_flags & SCSI_RESET_ASYNCHRONOUS)
- if (SCpnt->serial_number != SCpnt->serial_number_at_timeout) {
- restore_flags(flags);
- return 0;
- }
-
- if (SCpnt->internal_timeout & IN_RESET)
- {
- restore_flags(flags);
- while (SCpnt->internal_timeout & IN_RESET)
- barrier();
- }
- else
- {
- SCpnt->internal_timeout |= IN_RESET;
- update_timeout(SCpnt, RESET_TIMEOUT);
-
- if (host->host_busy)
- {
- restore_flags(flags);
- SCpnt1 = host->host_queue;
- while(SCpnt1) {
- if (SCpnt1->request.rq_status != RQ_INACTIVE) {
-#if 0
- if (!(SCpnt1->flags & IS_RESETTING) &&
- !(SCpnt1->internal_timeout & IN_ABORT))
- scsi_abort(SCpnt1, DID_RESET);
-#endif
- SCpnt1->flags |= (WAS_RESET | IS_RESETTING);
- }
- SCpnt1 = SCpnt1->next;
- }
-
- host->last_reset = jiffies;
- temp = host->hostt->reset(SCpnt, reset_flags);
- /*
- This test allows the driver to introduce an additional bus
- settle time delay by setting last_reset up to 20 seconds in
- the future. In the normal case where the driver does not
- modify last_reset, it must be assumed that the actual bus
- reset occurred immediately prior to the return to this code,
- and so last_reset must be updated to the current time, so
- that the delay in internal_cmnd will guarantee at least a
- MIN_RESET_DELAY bus settle time.
- */
- if ((host->last_reset < jiffies) ||
- (host->last_reset > (jiffies + 20 * HZ)))
- host->last_reset = jiffies;
- }
- else
- {
- if (!host->block) host->host_busy++;
- restore_flags(flags);
- host->last_reset = jiffies;
- SCpnt->flags |= (WAS_RESET | IS_RESETTING);
- temp = host->hostt->reset(SCpnt, reset_flags);
- if ((host->last_reset < jiffies) ||
- (host->last_reset > (jiffies + 20 * HZ)))
- host->last_reset = jiffies;
- if (!host->block) host->host_busy--;
- }
-
-#ifdef DEBUG
- printk("scsi reset function returned %d\n", temp);
-#endif
-
- /*
- * Now figure out what we need to do, based upon
- * what the low level driver said that it did.
- * If the result is SCSI_RESET_SUCCESS, SCSI_RESET_PENDING,
- * or SCSI_RESET_WAKEUP, then the low level driver did a
- * bus device reset or bus reset, so we should go through
- * and mark one or all of the devices on that bus
- * as having been reset.
- */
- switch(temp & SCSI_RESET_ACTION) {
- case SCSI_RESET_SUCCESS:
- if (temp & SCSI_RESET_HOST_RESET)
- scsi_mark_host_reset(host);
- else if (temp & SCSI_RESET_BUS_RESET)
- scsi_mark_bus_reset(host, SCpnt->channel);
- else scsi_mark_device_reset(SCpnt->device);
- save_flags(flags);
- cli();
- SCpnt->internal_timeout &= ~(IN_RESET|IN_RESET2|IN_RESET3);
- restore_flags(flags);
- return 0;
- case SCSI_RESET_PENDING:
- if (temp & SCSI_RESET_HOST_RESET)
- scsi_mark_host_reset(host);
- else if (temp & SCSI_RESET_BUS_RESET)
- scsi_mark_bus_reset(host, SCpnt->channel);
- else scsi_mark_device_reset(SCpnt->device);
- case SCSI_RESET_NOT_RUNNING:
- return 0;
- case SCSI_RESET_PUNT:
- SCpnt->internal_timeout &= ~(IN_RESET|IN_RESET2|IN_RESET3);
- scsi_request_sense (SCpnt);
- return 0;
- case SCSI_RESET_WAKEUP:
- if (temp & SCSI_RESET_HOST_RESET)
- scsi_mark_host_reset(host);
- else if (temp & SCSI_RESET_BUS_RESET)
- scsi_mark_bus_reset(host, SCpnt->channel);
- else scsi_mark_device_reset(SCpnt->device);
- SCpnt->internal_timeout &= ~(IN_RESET|IN_RESET2|IN_RESET3);
- scsi_request_sense (SCpnt);
- /*
- * If a bus reset was performed, we
- * need to wake up each and every command
- * that was active on the bus or if it was a HBA
- * reset all active commands on all channels
- */
- if( temp & SCSI_RESET_HOST_RESET )
- {
- SCpnt1 = host->host_queue;
- while(SCpnt1) {
- if (SCpnt1->request.rq_status != RQ_INACTIVE
- && SCpnt1 != SCpnt)
- scsi_request_sense (SCpnt1);
- SCpnt1 = SCpnt1->next;
- }
- } else if( temp & SCSI_RESET_BUS_RESET ) {
- SCpnt1 = host->host_queue;
- while(SCpnt1) {
- if(SCpnt1->request.rq_status != RQ_INACTIVE
- && SCpnt1 != SCpnt
- && SCpnt1->channel == SCpnt->channel)
- scsi_request_sense (SCpnt);
- SCpnt1 = SCpnt1->next;
- }
- }
- return 0;
- case SCSI_RESET_SNOOZE:
- /* In this case, we set the timeout field to 0
- * so that this command does not time out any more,
- * and we return 1 so that we get a message on the
- * screen.
- */
- save_flags(flags);
- cli();
- SCpnt->internal_timeout &= ~(IN_RESET|IN_RESET2|IN_RESET3);
- update_timeout(SCpnt, 0);
- restore_flags(flags);
- /* If you snooze, you lose... */
- case SCSI_RESET_ERROR:
- default:
- return 1;
- }
-
- return temp;
- }
- }
-}
-
-
-static void scsi_main_timeout(void)
-{
- /*
- * We must not enter update_timeout with a timeout condition still pending.
- */
-
- int timed_out;
- unsigned long flags;
- struct Scsi_Host * host;
- Scsi_Cmnd * SCpnt = NULL;
-
- save_flags(flags);
- cli();
-
- update_timeout(NULL, 0);
-
- /*
- * Find all timers such that they have 0 or negative (shouldn't happen)
- * time remaining on them.
- */
- timed_out = 0;
- for (host = scsi_hostlist; host; host = host->next) {
- for (SCpnt = host->host_queue; SCpnt; SCpnt = SCpnt->next)
- if (SCpnt->timeout == -1)
- {
- SCpnt->timeout = 0;
- SCpnt->serial_number_at_timeout = SCpnt->serial_number;
- ++timed_out;
- }
- }
- if (timed_out > 0) {
- for (host = scsi_hostlist; host; host = host->next) {
- for (SCpnt = host->host_queue; SCpnt; SCpnt = SCpnt->next)
- if (SCpnt->serial_number_at_timeout > 0 &&
- SCpnt->serial_number_at_timeout == SCpnt->serial_number)
- {
- restore_flags(flags);
- scsi_times_out(SCpnt);
- SCpnt->serial_number_at_timeout = 0;
- cli();
- }
- }
- }
- restore_flags(flags);
-}
-
-/*
- * The strategy is to cause the timer code to call scsi_times_out()
- * when the soonest timeout is pending.
- * The arguments are used when we are queueing a new command, because
- * we do not want to subtract the time used from this time, but when we
- * set the timer, we want to take this value into account.
- */
-
-static int update_timeout(Scsi_Cmnd * SCset, int timeout)
-{
- unsigned int least, used;
- unsigned int oldto;
- unsigned long flags;
- struct Scsi_Host * host;
- Scsi_Cmnd * SCpnt = NULL;
-
- save_flags(flags);
- cli();
-
- oldto = 0;
-
- /*
- * This routine can be a performance bottleneck under high loads, since
- * it is called twice per SCSI operation: once when internal_cmnd is
- * called, and again when scsi_done completes the command. To limit
- * the load this routine can cause, we shortcut processing if no clock
- * ticks have occurred since the last time it was called.
- */
-
- if (jiffies == time_start && timer_table[SCSI_TIMER].expires > 0) {
- if(SCset){
- oldto = SCset->timeout;
- SCset->timeout = timeout;
- if (timeout > 0 &&
- jiffies + timeout < timer_table[SCSI_TIMER].expires)
- timer_table[SCSI_TIMER].expires = jiffies + timeout;
- }
- restore_flags(flags);
- return oldto;
- }
-
- /*
- * Figure out how much time has passed since the last time the timeouts
- * were updated
- */
- used = (time_start) ? (jiffies - time_start) : 0;
-
- /*
- * Find out what is due to timeout soonest, and adjust all timeouts for
- * the amount of time that has passed since the last time we called
- * update_timeout.
- */
-
- oldto = 0;
-
- if(SCset){
- oldto = SCset->timeout - used;
- SCset->timeout = timeout;
- }
-
- least = 0xffffffff;
-
- for(host = scsi_hostlist; host; host = host->next)
- for(SCpnt = host->host_queue; SCpnt; SCpnt = SCpnt->next)
- if (SCpnt->timeout > 0) {
- if (SCpnt != SCset)
- SCpnt->timeout -= used;
- if(SCpnt->timeout <= 0) SCpnt->timeout = -1;
- if(SCpnt->timeout > 0 && SCpnt->timeout < least)
- least = SCpnt->timeout;
- }
-
- /*
- * If something is due to timeout again, then we will set the next timeout
- * interrupt to occur. Otherwise, timeouts are disabled.
- */
-
- if (least != 0xffffffff)
- {
- time_start = jiffies;
- timer_table[SCSI_TIMER].expires = (time_elapsed = least) + jiffies;
- timer_active |= 1 << SCSI_TIMER;
- }
- else
- {
- timer_table[SCSI_TIMER].expires = time_start = time_elapsed = 0;
- timer_active &= ~(1 << SCSI_TIMER);
- }
- restore_flags(flags);
- return oldto;
-}
-
-#ifdef CONFIG_MODULES
-static int scsi_register_host(Scsi_Host_Template *);
-static void scsi_unregister_host(Scsi_Host_Template *);
-#endif
-
-void *scsi_malloc(unsigned int len)
-{
- unsigned int nbits, mask;
- unsigned long flags;
- int i, j;
- if(len % SECTOR_SIZE != 0 || len > PAGE_SIZE)
- return NULL;
-
- save_flags(flags);
- cli();
- nbits = len >> 9;
- mask = (1 << nbits) - 1;
-
- for(i=0;i < dma_sectors / SECTORS_PER_PAGE; i++)
- for(j=0; j<=SECTORS_PER_PAGE - nbits; j++){
- if ((dma_malloc_freelist[i] & (mask << j)) == 0){
- dma_malloc_freelist[i] |= (mask << j);
- restore_flags(flags);
- dma_free_sectors -= nbits;
-#ifdef DEBUG
- printk("SMalloc: %d %p\n",len, dma_malloc_pages[i] + (j << 9));
-#endif
- return (void *) ((unsigned long) dma_malloc_pages[i] + (j << 9));
- }
- }
- restore_flags(flags);
- return NULL; /* Nope. No more */
-}
-
-int scsi_free(void *obj, unsigned int len)
-{
- unsigned int page, sector, nbits, mask;
- unsigned long flags;
-
-#ifdef DEBUG
- unsigned long ret = 0;
-
-#ifdef __mips__
- __asm__ __volatile__ ("move\t%0,$31":"=r"(ret));
-#else
- ret = __builtin_return_address(0);
-#endif
- printk("scsi_free %p %d\n",obj, len);
-#endif
-
- for (page = 0; page < dma_sectors / SECTORS_PER_PAGE; page++) {
- unsigned long page_addr = (unsigned long) dma_malloc_pages[page];
- if ((unsigned long) obj >= page_addr &&
- (unsigned long) obj < page_addr + PAGE_SIZE)
- {
- sector = (((unsigned long) obj) - page_addr) >> 9;
-
- nbits = len >> 9;
- mask = (1 << nbits) - 1;
-
- if ((mask << sector) >= (1 << SECTORS_PER_PAGE))
- panic ("scsi_free:Bad memory alignment");
-
- save_flags(flags);
- cli();
- if((dma_malloc_freelist[page] &
- (mask << sector)) != (mask<<sector)){
-#ifdef DEBUG
- printk("scsi_free(obj=%p, len=%d) called from %08lx\n",
- obj, len, ret);
-#endif
- panic("scsi_free:Trying to free unused memory");
- }
- dma_free_sectors += nbits;
- dma_malloc_freelist[page] &= ~(mask << sector);
- restore_flags(flags);
- return 0;
- }
- }
- panic("scsi_free:Bad offset");
-}
-
-
-int scsi_loadable_module_flag; /* Set after we scan builtin drivers */
-
-void * scsi_init_malloc(unsigned int size, int priority)
-{
- void * retval;
-
- /*
- * For buffers used by the DMA pool, we assume page aligned
- * structures.
- */
- if ((size % PAGE_SIZE) == 0) {
- int order, a_size;
- for (order = 0, a_size = PAGE_SIZE;
- a_size < size; order++, a_size <<= 1)
- ;
- retval = (void *) __get_dma_pages(priority & GFP_LEVEL_MASK,
- order);
- } else
- retval = kmalloc(size, priority);
-
- if (retval)
- memset(retval, 0, size);
- return retval;
-}
-
-
-void scsi_init_free(char * ptr, unsigned int size)
-{
- /*
- * We need this special code here because the DMA pool assumes
- * page aligned data. Besides, it is wasteful to allocate
- * page sized chunks with kmalloc.
- */
- if ((size % PAGE_SIZE) == 0) {
- int order, a_size;
-
- for (order = 0, a_size = PAGE_SIZE;
- a_size < size; order++, a_size <<= 1)
- ;
- free_pages((unsigned long)ptr, order);
- } else
- kfree(ptr);
-}
-
-void scsi_build_commandblocks(Scsi_Device * SDpnt)
-{
- struct Scsi_Host *host = SDpnt->host;
- int j;
- Scsi_Cmnd * SCpnt;
-
- if (SDpnt->queue_depth == 0)
- SDpnt->queue_depth = host->cmd_per_lun;
- SDpnt->device_queue = NULL;
-
- for(j=0;j<SDpnt->queue_depth;j++){
- SCpnt = (Scsi_Cmnd *)
- scsi_init_malloc(sizeof(Scsi_Cmnd),
- GFP_ATOMIC |
- (host->unchecked_isa_dma ? GFP_DMA : 0));
- SCpnt->host = host;
- SCpnt->device = SDpnt;
- SCpnt->target = SDpnt->id;
- SCpnt->lun = SDpnt->lun;
- SCpnt->channel = SDpnt->channel;
- SCpnt->request.rq_status = RQ_INACTIVE;
- SCpnt->use_sg = 0;
- SCpnt->old_use_sg = 0;
- SCpnt->old_cmd_len = 0;
- SCpnt->timeout = 0;
- SCpnt->underflow = 0;
- SCpnt->transfersize = 0;
- SCpnt->serial_number = 0;
- SCpnt->serial_number_at_timeout = 0;
- SCpnt->host_scribble = NULL;
- if(host->host_queue)
- host->host_queue->prev = SCpnt;
- SCpnt->next = host->host_queue;
- SCpnt->prev = NULL;
- host->host_queue = SCpnt;
- SCpnt->device_next = SDpnt->device_queue;
- SDpnt->device_queue = SCpnt;
- }
- SDpnt->has_cmdblocks = 1;
-}
-
-/*
- * scsi_dev_init() is our initialization routine, which in turn calls host
- * initialization, bus scanning, and sd/st initialization routines.
- */
-
-int scsi_dev_init(void)
-{
- Scsi_Device * SDpnt;
- struct Scsi_Host * shpnt;
- struct Scsi_Device_Template * sdtpnt;
-#ifdef FOO_ON_YOU
- return;
-#endif
-
- /* Yes we're here... */
-#if CONFIG_PROC_FS
- dispatch_scsi_info_ptr = dispatch_scsi_info;
-#endif
-
- /* Init a few things so we can "malloc" memory. */
- scsi_loadable_module_flag = 0;
-
- timer_table[SCSI_TIMER].fn = scsi_main_timeout;
- timer_table[SCSI_TIMER].expires = 0;
-
-#ifdef CONFIG_MODULES
- register_symtab(&scsi_symbol_table);
-#endif
-
- /* Register the /proc/scsi/scsi entry */
-#if CONFIG_PROC_FS
- proc_scsi_register(0, &proc_scsi_scsi);
-#endif
-
- /* initialize all hosts */
- scsi_init();
-
- scsi_devices = (Scsi_Device *) NULL;
-
- for (shpnt = scsi_hostlist; shpnt; shpnt = shpnt->next) {
- scan_scsis(shpnt,0,0,0,0); /* scan for scsi devices */
- if (shpnt->select_queue_depths != NULL)
- (shpnt->select_queue_depths)(shpnt, scsi_devices);
- }
-
- printk("scsi : detected ");
- for (sdtpnt = scsi_devicelist; sdtpnt; sdtpnt = sdtpnt->next)
- if (sdtpnt->dev_noticed && sdtpnt->name)
- printk("%d SCSI %s%s ", sdtpnt->dev_noticed, sdtpnt->name,
- (sdtpnt->dev_noticed != 1) ? "s" : "");
- printk("total.\n");
-
- for(sdtpnt = scsi_devicelist; sdtpnt; sdtpnt = sdtpnt->next)
- if(sdtpnt->init && sdtpnt->dev_noticed) (*sdtpnt->init)();
-
- for (SDpnt=scsi_devices; SDpnt; SDpnt = SDpnt->next) {
- SDpnt->scsi_request_fn = NULL;
- for(sdtpnt = scsi_devicelist; sdtpnt; sdtpnt = sdtpnt->next)
- if(sdtpnt->attach) (*sdtpnt->attach)(SDpnt);
- if(SDpnt->attached) scsi_build_commandblocks(SDpnt);
- }
-
-
- /*
- * This should build the DMA pool.
- */
- resize_dma_pool();
-
- /*
- * OK, now we finish the initialization by doing spin-up, read
- * capacity, etc, etc
- */
- for(sdtpnt = scsi_devicelist; sdtpnt; sdtpnt = sdtpnt->next)
- if(sdtpnt->finish && sdtpnt->nr_dev)
- (*sdtpnt->finish)();
-
- scsi_loadable_module_flag = 1;
-
- return 0;
-}
-
-static void print_inquiry(unsigned char *data)
-{
- int i;
-
- printk(" Vendor: ");
- for (i = 8; i < 16; i++)
- {
- if (data[i] >= 0x20 && i < data[4] + 5)
- printk("%c", data[i]);
- else
- printk(" ");
- }
-
- printk(" Model: ");
- for (i = 16; i < 32; i++)
- {
- if (data[i] >= 0x20 && i < data[4] + 5)
- printk("%c", data[i]);
- else
- printk(" ");
- }
-
- printk(" Rev: ");
- for (i = 32; i < 36; i++)
- {
- if (data[i] >= 0x20 && i < data[4] + 5)
- printk("%c", data[i]);
- else
- printk(" ");
- }
-
- printk("\n");
-
- i = data[0] & 0x1f;
-
- printk(" Type: %s ",
- i < MAX_SCSI_DEVICE_CODE ? scsi_device_types[i] : "Unknown " );
- printk(" ANSI SCSI revision: %02x", data[2] & 0x07);
- if ((data[2] & 0x07) == 1 && (data[3] & 0x0f) == 1)
- printk(" CCS\n");
- else
- printk("\n");
-}
-
-
-#ifdef CONFIG_PROC_FS
-int scsi_proc_info(char *buffer, char **start, off_t offset, int length,
- int hostno, int inout)
-{
- Scsi_Cmnd *SCpnt;
- struct Scsi_Device_Template *SDTpnt;
- Scsi_Device *scd, *scd_h = NULL;
- struct Scsi_Host *HBA_ptr;
- char *p;
- int host, channel, id, lun;
- int size, len = 0;
- off_t begin = 0;
- off_t pos = 0;
-
- scd = scsi_devices;
- HBA_ptr = scsi_hostlist;
-
- if(inout == 0) {
- size = sprintf(buffer+len,"Attached devices: %s\n", (scd)?"":"none");
- len += size;
- pos = begin + len;
- while (HBA_ptr) {
-#if 0
- size += sprintf(buffer+len,"scsi%2d: %s\n", (int) HBA_ptr->host_no,
- HBA_ptr->hostt->procname);
- len += size;
- pos = begin + len;
-#endif
- scd = scsi_devices;
- while (scd) {
- if (scd->host == HBA_ptr) {
- proc_print_scsidevice(scd, buffer, &size, len);
- len += size;
- pos = begin + len;
-
- if (pos < offset) {
- len = 0;
- begin = pos;
- }
- if (pos > offset + length)
- goto stop_output;
- }
- scd = scd->next;
- }
- HBA_ptr = HBA_ptr->next;
- }
-
- stop_output:
- *start=buffer+(offset-begin); /* Start of wanted data */
- len-=(offset-begin); /* Start slop */
- if(len>length)
- len = length; /* Ending slop */
- return (len);
- }
-
- if(!buffer || length < 25 || strncmp("scsi", buffer, 4))
- return(-EINVAL);
-
- /*
- * Usage: echo "scsi add-single-device 0 1 2 3" >/proc/scsi/scsi
- * with "0 1 2 3" replaced by your "Host Channel Id Lun".
- * Consider this feature BETA.
- * CAUTION: This is not for hotplugging your peripherals. As
- * SCSI was not designed for this you could damage your
- * hardware !
- * However perhaps it is legal to switch on an
- * already connected device. It is perhaps not
- * guaranteed this device doesn't corrupt an ongoing data transfer.
- */
- if(!strncmp("add-single-device", buffer + 5, 17)) {
- p = buffer + 23;
-
- host = simple_strtoul(p, &p, 0);
- channel = simple_strtoul(p+1, &p, 0);
- id = simple_strtoul(p+1, &p, 0);
- lun = simple_strtoul(p+1, &p, 0);
-
- printk("scsi singledevice %d %d %d %d\n", host, channel,
- id, lun);
-
- while(scd && (scd->host->host_no != host
- || scd->channel != channel
- || scd->id != id
- || scd->lun != lun)) {
- scd = scd->next;
- }
- if(scd)
- return(-ENOSYS); /* We do not yet support unplugging */
- while(HBA_ptr && HBA_ptr->host_no != host)
- HBA_ptr = HBA_ptr->next;
-
- if(!HBA_ptr)
- return(-ENXIO);
-
- scan_scsis (HBA_ptr, 1, channel, id, lun);
- return(length);
-
- }
-
- /*
- * Usage: echo "scsi remove-single-device 0 1 2 3" >/proc/scsi/scsi
- * with "0 1 2 3" replaced by your "Host Channel Id Lun".
- *
- * Consider this feature pre-BETA.
- *
- * CAUTION: This is not for hotplugging your peripherals. As
- * SCSI was not designed for this you could damage your
- * hardware and thoroughly confuse the SCSI subsystem.
- *
- */
- else if(!strncmp("remove-single-device", buffer + 5, 20)) {
- p = buffer + 26;
-
- host = simple_strtoul(p, &p, 0);
- channel = simple_strtoul(p+1, &p, 0);
- id = simple_strtoul(p+1, &p, 0);
- lun = simple_strtoul(p+1, &p, 0);
-
- while(scd != NULL) {
- if(scd->host->host_no == host
- && scd->channel == channel
- && scd->id == id
- && scd->lun == lun){
- break;
- }
- scd_h = scd;
- scd = scd->next;
- }
-
- if(scd == NULL)
- return(-ENODEV); /* there is no such device attached */
-
- if(scd->access_count)
- return(-EBUSY);
-
- SDTpnt = scsi_devicelist;
- while(SDTpnt != NULL) {
- if(SDTpnt->detach) (*SDTpnt->detach)(scd);
- SDTpnt = SDTpnt->next;
- }
-
- if(scd->attached == 0) {
- /*
- * Nobody is using this device any more.
- * Free all of the command structures.
- */
- for(SCpnt=scd->host->host_queue; SCpnt; SCpnt = SCpnt->next){
- if(SCpnt->device == scd) {
- if(SCpnt->prev != NULL)
- SCpnt->prev->next = SCpnt->next;
- if(SCpnt->next != NULL)
- SCpnt->next->prev = SCpnt->prev;
- if(SCpnt == scd->host->host_queue)
- scd->host->host_queue = SCpnt->next;
- scsi_init_free((char *) SCpnt, sizeof(*SCpnt));
- }
- }
- /* Now we can remove the device structure */
- if(scd_h != NULL) {
- scd_h->next = scd->next;
- } else if (scsi_devices == scd) {
- /* We had a hit on the first entry of the device list */
- scsi_devices = scd->next;
- }
- scsi_init_free((char *) scd, sizeof(Scsi_Device));
- } else {
- return(-EBUSY);
- }
- return(0);
- }
- return(-EINVAL);
-}
-#endif
-
-/*
- * Go through the device list and recompute the most appropriate size
- * for the dma pool. Then grab more memory (as required).
- */
-static void resize_dma_pool(void)
-{
- int i;
- unsigned long size;
- struct Scsi_Host * shpnt;
- struct Scsi_Host * host = NULL;
- Scsi_Device * SDpnt;
- unsigned long flags;
- FreeSectorBitmap * new_dma_malloc_freelist = NULL;
- unsigned int new_dma_sectors = 0;
- unsigned int new_need_isa_buffer = 0;
- unsigned char ** new_dma_malloc_pages = NULL;
-
- if( !scsi_devices )
- {
- /*
- * Free up the DMA pool.
- */
- if( dma_free_sectors != dma_sectors )
- panic("SCSI DMA pool memory leak %d %d\n",dma_free_sectors,dma_sectors);
-
- for(i=0; i < dma_sectors / SECTORS_PER_PAGE; i++)
- scsi_init_free(dma_malloc_pages[i], PAGE_SIZE);
- if (dma_malloc_pages)
- scsi_init_free((char *) dma_malloc_pages,
- (dma_sectors / SECTORS_PER_PAGE)*sizeof(*dma_malloc_pages));
- dma_malloc_pages = NULL;
- if (dma_malloc_freelist)
- scsi_init_free((char *) dma_malloc_freelist,
- (dma_sectors / SECTORS_PER_PAGE)*sizeof(*dma_malloc_freelist));
- dma_malloc_freelist = NULL;
- dma_sectors = 0;
- dma_free_sectors = 0;
- return;
- }
- /* Next, check to see if we need to extend the DMA buffer pool */
-
- new_dma_sectors = 2*SECTORS_PER_PAGE; /* Base value we use */
-
- if (high_memory-1 > ISA_DMA_THRESHOLD)
- scsi_need_isa_bounce_buffers = 1;
- else
- scsi_need_isa_bounce_buffers = 0;
-
- if (scsi_devicelist)
- for(shpnt=scsi_hostlist; shpnt; shpnt = shpnt->next)
- new_dma_sectors += SECTORS_PER_PAGE; /* Increment for each host */
-
- for (SDpnt=scsi_devices; SDpnt; SDpnt = SDpnt->next) {
- host = SDpnt->host;
-
- /*
- * sd and sr drivers allocate scatterlists.
- * sr drivers may allocate for each command 1x2048 or 2x1024 extra
- * buffers for 2k sector size and 1k fs.
- * sg driver allocates buffers < 4k.
- * st driver does not need buffers from the dma pool.
- * estimate 4k buffer/command for devices of unknown type (should panic).
- */
- if (SDpnt->type == TYPE_WORM || SDpnt->type == TYPE_ROM ||
- SDpnt->type == TYPE_DISK || SDpnt->type == TYPE_MOD) {
- new_dma_sectors += ((host->sg_tablesize *
- sizeof(struct scatterlist) + 511) >> 9) *
- SDpnt->queue_depth;
- if (SDpnt->type == TYPE_WORM || SDpnt->type == TYPE_ROM)
- new_dma_sectors += (2048 >> 9) * SDpnt->queue_depth;
- }
- else if (SDpnt->type == TYPE_SCANNER ||
- SDpnt->type == TYPE_PROCESSOR ||
- SDpnt->type == TYPE_MEDIUM_CHANGER) {
- new_dma_sectors += (4096 >> 9) * SDpnt->queue_depth;
- }
- else {
- if (SDpnt->type != TYPE_TAPE) {
- printk("resize_dma_pool: unknown device type %d\n", SDpnt->type);
- new_dma_sectors += (4096 >> 9) * SDpnt->queue_depth;
- }
- }
-
- if(host->unchecked_isa_dma &&
- scsi_need_isa_bounce_buffers &&
- SDpnt->type != TYPE_TAPE) {
- new_dma_sectors += (PAGE_SIZE >> 9) * host->sg_tablesize *
- SDpnt->queue_depth;
- new_need_isa_buffer++;
- }
- }
-
-#ifdef DEBUG_INIT
- printk("resize_dma_pool: needed dma sectors = %d\n", new_dma_sectors);
-#endif
-
- /* limit DMA memory to 32MB: */
- new_dma_sectors = (new_dma_sectors + 15) & 0xfff0;
-
- /*
- * We never shrink the buffers - this leads to
- * race conditions that I would rather not even think
- * about right now.
- */
- if( new_dma_sectors < dma_sectors )
- new_dma_sectors = dma_sectors;
-
- if (new_dma_sectors)
- {
- size = (new_dma_sectors / SECTORS_PER_PAGE)*sizeof(FreeSectorBitmap);
- new_dma_malloc_freelist = (FreeSectorBitmap *) scsi_init_malloc(size, GFP_ATOMIC);
- memset(new_dma_malloc_freelist, 0, size);
-
- size = (new_dma_sectors / SECTORS_PER_PAGE)*sizeof(*new_dma_malloc_pages);
- new_dma_malloc_pages = (unsigned char **) scsi_init_malloc(size, GFP_ATOMIC);
- memset(new_dma_malloc_pages, 0, size);
- }
-
- /*
- * If we need more buffers, expand the list.
- */
- if( new_dma_sectors > dma_sectors ) {
- for(i=dma_sectors / SECTORS_PER_PAGE; i< new_dma_sectors / SECTORS_PER_PAGE; i++)
- new_dma_malloc_pages[i] = (unsigned char *)
- scsi_init_malloc(PAGE_SIZE, GFP_ATOMIC | GFP_DMA);
- }
-
- /* When we dick with the actual DMA list, we need to
- * protect things
- */
- save_flags(flags);
- cli();
- if (dma_malloc_freelist)
- {
- size = (dma_sectors / SECTORS_PER_PAGE)*sizeof(FreeSectorBitmap);
- memcpy(new_dma_malloc_freelist, dma_malloc_freelist, size);
- scsi_init_free((char *) dma_malloc_freelist, size);
- }
- dma_malloc_freelist = new_dma_malloc_freelist;
-
- if (dma_malloc_pages)
- {
- size = (dma_sectors / SECTORS_PER_PAGE)*sizeof(*dma_malloc_pages);
- memcpy(new_dma_malloc_pages, dma_malloc_pages, size);
- scsi_init_free((char *) dma_malloc_pages, size);
- }
-
- dma_free_sectors += new_dma_sectors - dma_sectors;
- dma_malloc_pages = new_dma_malloc_pages;
- dma_sectors = new_dma_sectors;
- need_isa_buffer = new_need_isa_buffer;
- restore_flags(flags);
-
-#ifdef DEBUG_INIT
- printk("resize_dma_pool: dma free sectors = %d\n", dma_free_sectors);
- printk("resize_dma_pool: dma sectors = %d\n", dma_sectors);
- printk("resize_dma_pool: need isa buffers = %d\n", need_isa_buffer);
-#endif
-}
-
-#ifdef CONFIG_MODULES /* a big #ifdef block... */
-
-/*
- * This entry point should be called by a loadable module if it is trying
- * add a low level scsi driver to the system.
- */
-static int scsi_register_host(Scsi_Host_Template * tpnt)
-{
- int pcount;
- struct Scsi_Host * shpnt;
- Scsi_Device * SDpnt;
- struct Scsi_Device_Template * sdtpnt;
- const char * name;
-
- if (tpnt->next || !tpnt->detect) return 1;/* Must be already loaded, or
- * no detect routine available
- */
- pcount = next_scsi_host;
- if ((tpnt->present = tpnt->detect(tpnt)))
- {
- if(pcount == next_scsi_host) {
- if(tpnt->present > 1) {
- printk("Failure to register low-level scsi driver");
- scsi_unregister_host(tpnt);
- return 1;
- }
- /* The low-level driver failed to register a driver. We
- * can do this now.
- */
- scsi_register(tpnt,0);
- }
- tpnt->next = scsi_hosts; /* Add to the linked list */
- scsi_hosts = tpnt;
-
- /* Add the new driver to /proc/scsi */
-#if CONFIG_PROC_FS
- build_proc_dir_entries(tpnt);
-#endif
-
- for(shpnt=scsi_hostlist; shpnt; shpnt = shpnt->next)
- if(shpnt->hostt == tpnt)
- {
- if(tpnt->info)
- name = tpnt->info(shpnt);
- else
- name = tpnt->name;
- printk ("scsi%d : %s\n", /* And print a little message */
- shpnt->host_no, name);
- }
-
- printk ("scsi : %d host%s.\n", next_scsi_host,
- (next_scsi_host == 1) ? "" : "s");
-
- scsi_make_blocked_list();
-
- /* The next step is to call scan_scsis here. This generates the
- * Scsi_Devices entries
- */
-
- for(shpnt=scsi_hostlist; shpnt; shpnt = shpnt->next)
- if(shpnt->hostt == tpnt) {
- scan_scsis(shpnt,0,0,0,0);
- if (shpnt->select_queue_depths != NULL)
- (shpnt->select_queue_depths)(shpnt, scsi_devices);
- }
-
- for(sdtpnt = scsi_devicelist; sdtpnt; sdtpnt = sdtpnt->next)
- if(sdtpnt->init && sdtpnt->dev_noticed) (*sdtpnt->init)();
-
- /* Next we create the Scsi_Cmnd structures for this host */
-
- for(SDpnt = scsi_devices; SDpnt; SDpnt = SDpnt->next)
- if(SDpnt->host->hostt == tpnt)
- {
- for(sdtpnt = scsi_devicelist; sdtpnt; sdtpnt = sdtpnt->next)
- if(sdtpnt->attach) (*sdtpnt->attach)(SDpnt);
- if(SDpnt->attached) scsi_build_commandblocks(SDpnt);
- }
-
- /*
- * Now that we have all of the devices, resize the DMA pool,
- * as required. */
- resize_dma_pool();
-
-
- /* This does any final handling that is required. */
- for(sdtpnt = scsi_devicelist; sdtpnt; sdtpnt = sdtpnt->next)
- if(sdtpnt->finish && sdtpnt->nr_dev)
- (*sdtpnt->finish)();
- }
-
-#if defined(USE_STATIC_SCSI_MEMORY)
- printk ("SCSI memory: total %ldKb, used %ldKb, free %ldKb.\n",
- (scsi_memory_upper_value - scsi_memory_lower_value) / 1024,
- (scsi_init_memory_start - scsi_memory_lower_value) / 1024,
- (scsi_memory_upper_value - scsi_init_memory_start) / 1024);
-#endif
-
- MOD_INC_USE_COUNT;
- return 0;
-}
-
-/*
- * Similarly, this entry point should be called by a loadable module if it
- * is trying to remove a low level scsi driver from the system.
- */
-static void scsi_unregister_host(Scsi_Host_Template * tpnt)
-{
- Scsi_Host_Template * SHT, *SHTp;
- Scsi_Device *sdpnt, * sdppnt, * sdpnt1;
- Scsi_Cmnd * SCpnt;
- unsigned long flags;
- struct Scsi_Device_Template * sdtpnt;
- struct Scsi_Host * shpnt, *sh1;
- int pcount;
-
- /* First verify that this host adapter is completely free with no pending
- * commands */
-
- for(sdpnt = scsi_devices; sdpnt; sdpnt = sdpnt->next)
- if(sdpnt->host->hostt == tpnt && sdpnt->host->hostt->usage_count
- && *sdpnt->host->hostt->usage_count) return;
-
- for(shpnt = scsi_hostlist; shpnt; shpnt = shpnt->next)
- {
- if (shpnt->hostt != tpnt) continue;
- for(SCpnt = shpnt->host_queue; SCpnt; SCpnt = SCpnt->next)
- {
- save_flags(flags);
- cli();
- if(SCpnt->request.rq_status != RQ_INACTIVE) {
- restore_flags(flags);
- for(SCpnt = shpnt->host_queue; SCpnt; SCpnt = SCpnt->next)
- if(SCpnt->request.rq_status == RQ_SCSI_DISCONNECTING)
- SCpnt->request.rq_status = RQ_INACTIVE;
- printk("Device busy???\n");
- return;
- }
- SCpnt->request.rq_status = RQ_SCSI_DISCONNECTING; /* Mark as busy */
- restore_flags(flags);
- }
- }
- /* Next we detach the high level drivers from the Scsi_Device structures */
-
- for(sdpnt = scsi_devices; sdpnt; sdpnt = sdpnt->next)
- if(sdpnt->host->hostt == tpnt)
- {
- for(sdtpnt = scsi_devicelist; sdtpnt; sdtpnt = sdtpnt->next)
- if(sdtpnt->detach) (*sdtpnt->detach)(sdpnt);
- /* If something still attached, punt */
- if (sdpnt->attached) {
- printk("Attached usage count = %d\n", sdpnt->attached);
- return;
- }
- }
-
- /* Next we free up the Scsi_Cmnd structures for this host */
-
- for(sdpnt = scsi_devices; sdpnt; sdpnt = sdpnt->next)
- if(sdpnt->host->hostt == tpnt)
- while (sdpnt->host->host_queue) {
- SCpnt = sdpnt->host->host_queue->next;
- scsi_init_free((char *) sdpnt->host->host_queue, sizeof(Scsi_Cmnd));
- sdpnt->host->host_queue = SCpnt;
- if (SCpnt) SCpnt->prev = NULL;
- sdpnt->has_cmdblocks = 0;
- }
-
- /* Next free up the Scsi_Device structures for this host */
-
- sdppnt = NULL;
- for(sdpnt = scsi_devices; sdpnt; sdpnt = sdpnt1)
- {
- sdpnt1 = sdpnt->next;
- if (sdpnt->host->hostt == tpnt) {
- if (sdppnt)
- sdppnt->next = sdpnt->next;
- else
- scsi_devices = sdpnt->next;
- scsi_init_free((char *) sdpnt, sizeof (Scsi_Device));
- } else
- sdppnt = sdpnt;
- }
-
- /* Next we go through and remove the instances of the individual hosts
- * that were detected */
-
- shpnt = scsi_hostlist;
- while(shpnt) {
- sh1 = shpnt->next;
- if(shpnt->hostt == tpnt) {
- if(shpnt->loaded_as_module) {
- pcount = next_scsi_host;
- /* Remove the /proc/scsi directory entry */
-#if CONFIG_PROC_FS
- proc_scsi_unregister(tpnt->proc_dir,
- shpnt->host_no + PROC_SCSI_FILE);
-#endif
- if(tpnt->release)
- (*tpnt->release)(shpnt);
- else {
- /* This is the default case for the release function.
- * It should do the right thing for most correctly
- * written host adapters.
- */
- if (shpnt->irq) free_irq(shpnt->irq, NULL);
- if (shpnt->dma_channel != 0xff) free_dma(shpnt->dma_channel);
- if (shpnt->io_port && shpnt->n_io_port)
- release_region(shpnt->io_port, shpnt->n_io_port);
- }
- if(pcount == next_scsi_host) scsi_unregister(shpnt);
- tpnt->present--;
- }
- }
- shpnt = sh1;
- }
-
- /*
- * If there are absolutely no more hosts left, it is safe
- * to completely nuke the DMA pool. The resize operation will
- * do the right thing and free everything.
- */
- if( !scsi_devices )
- resize_dma_pool();
-
- printk ("scsi : %d host%s.\n", next_scsi_host,
- (next_scsi_host == 1) ? "" : "s");
-
-#if defined(USE_STATIC_SCSI_MEMORY)
- printk ("SCSI memory: total %ldKb, used %ldKb, free %ldKb.\n",
- (scsi_memory_upper_value - scsi_memory_lower_value) / 1024,
- (scsi_init_memory_start - scsi_memory_lower_value) / 1024,
- (scsi_memory_upper_value - scsi_init_memory_start) / 1024);
-#endif
-
- scsi_make_blocked_list();
-
- /* There were some hosts that were loaded at boot time, so we cannot
- do any more than this */
- if (tpnt->present) return;
-
- /* OK, this is the very last step. Remove this host adapter from the
- linked list. */
- for(SHTp=NULL, SHT=scsi_hosts; SHT; SHTp=SHT, SHT=SHT->next)
- if(SHT == tpnt) {
- if(SHTp)
- SHTp->next = SHT->next;
- else
- scsi_hosts = SHT->next;
- SHT->next = NULL;
- break;
- }
-
- /* Rebuild the /proc/scsi directory entries */
-#if CONFIG_PROC_FS
- proc_scsi_unregister(tpnt->proc_dir, tpnt->proc_dir->low_ino);
-#endif
- MOD_DEC_USE_COUNT;
-}
-
-/*
- * This entry point should be called by a loadable module if it is trying
- * add a high level scsi driver to the system.
- */
-static int scsi_register_device_module(struct Scsi_Device_Template * tpnt)
-{
- Scsi_Device * SDpnt;
-
- if (tpnt->next) return 1;
-
- scsi_register_device(tpnt);
- /*
- * First scan the devices that we know about, and see if we notice them.
- */
-
- for(SDpnt = scsi_devices; SDpnt; SDpnt = SDpnt->next)
- if(tpnt->detect) SDpnt->attached += (*tpnt->detect)(SDpnt);
-
- /*
- * If any of the devices would match this driver, then perform the
- * init function.
- */
- if(tpnt->init && tpnt->dev_noticed)
- if ((*tpnt->init)()) return 1;
-
- /*
- * Now actually connect the devices to the new driver.
- */
- for(SDpnt = scsi_devices; SDpnt; SDpnt = SDpnt->next)
- {
- if(tpnt->attach) (*tpnt->attach)(SDpnt);
- /*
- * If this driver attached to the device, and we no longer
- * have anything attached, release the scsi command blocks.
- */
- if(SDpnt->attached && SDpnt->has_cmdblocks == 0)
- scsi_build_commandblocks(SDpnt);
- }
-
- /*
- * This does any final handling that is required.
- */
- if(tpnt->finish && tpnt->nr_dev) (*tpnt->finish)();
- MOD_INC_USE_COUNT;
- return 0;
-}
-
-static int scsi_unregister_device(struct Scsi_Device_Template * tpnt)
-{
- Scsi_Device * SDpnt;
- Scsi_Cmnd * SCpnt;
- struct Scsi_Device_Template * spnt;
- struct Scsi_Device_Template * prev_spnt;
-
- /*
- * If we are busy, this is not going to fly.
- */
- if( *tpnt->usage_count != 0) return 0;
- /*
- * Next, detach the devices from the driver.
- */
-
- for(SDpnt = scsi_devices; SDpnt; SDpnt = SDpnt->next)
- {
- if(tpnt->detach) (*tpnt->detach)(SDpnt);
- if(SDpnt->attached == 0)
- {
- /*
- * Nobody is using this device any more. Free all of the
- * command structures.
- */
- for(SCpnt = SDpnt->host->host_queue; SCpnt; SCpnt = SCpnt->next)
- {
- if(SCpnt->device == SDpnt)
- {
- if(SCpnt->prev != NULL)
- SCpnt->prev->next = SCpnt->next;
- if(SCpnt->next != NULL)
- SCpnt->next->prev = SCpnt->prev;
- if(SCpnt == SDpnt->host->host_queue)
- SDpnt->host->host_queue = SCpnt->next;
- scsi_init_free((char *) SCpnt, sizeof(*SCpnt));
- }
- }
- SDpnt->has_cmdblocks = 0;
- }
- }
- /*
- * Extract the template from the linked list.
- */
- spnt = scsi_devicelist;
- prev_spnt = NULL;
- while(spnt != tpnt)
- {
- prev_spnt = spnt;
- spnt = spnt->next;
- }
- if(prev_spnt == NULL)
- scsi_devicelist = tpnt->next;
- else
- prev_spnt->next = spnt->next;
-
- MOD_DEC_USE_COUNT;
- /*
- * Final cleanup for the driver is done in the driver sources in the
- * cleanup function.
- */
- return 0;
-}
-
-
-int scsi_register_module(int module_type, void * ptr)
-{
- switch(module_type){
- case MODULE_SCSI_HA:
- return scsi_register_host((Scsi_Host_Template *) ptr);
-
- /* Load upper level device handler of some kind */
- case MODULE_SCSI_DEV:
-#ifdef CONFIG_KERNELD
- if (scsi_hosts == NULL)
- request_module("scsi_hostadapter");
-#endif
- return scsi_register_device_module((struct Scsi_Device_Template *) ptr);
- /* The rest of these are not yet implemented */
-
- /* Load constants.o */
- case MODULE_SCSI_CONST:
-
- /* Load specialized ioctl handler for some device. Intended for
- * cdroms that have non-SCSI2 audio command sets. */
- case MODULE_SCSI_IOCTL:
-
- default:
- return 1;
- }
-}
-
-void scsi_unregister_module(int module_type, void * ptr)
-{
- switch(module_type) {
- case MODULE_SCSI_HA:
- scsi_unregister_host((Scsi_Host_Template *) ptr);
- break;
- case MODULE_SCSI_DEV:
- scsi_unregister_device((struct Scsi_Device_Template *) ptr);
- break;
- /* The rest of these are not yet implemented. */
- case MODULE_SCSI_CONST:
- case MODULE_SCSI_IOCTL:
- break;
- default:
- }
- return;
-}
-
-#endif /* CONFIG_MODULES */
-
-#ifdef DEBUG_TIMEOUT
-static void
-scsi_dump_status(void)
-{
- int i;
- struct Scsi_Host * shpnt;
- Scsi_Cmnd * SCpnt;
- printk("Dump of scsi parameters:\n");
- i = 0;
- for(shpnt = scsi_hostlist; shpnt; shpnt = shpnt->next)
- for(SCpnt=shpnt->host_queue; SCpnt; SCpnt = SCpnt->next)
- {
- /* (0) 0:0:0:0 (802 123434 8 8 0) (3 3 2) (%d %d %d) %d %x */
- printk("(%d) %d:%d:%d:%d (%s %ld %ld %ld %d) (%d %d %x) (%d %d %d) %x %x %x\n",
- i++, SCpnt->host->host_no,
- SCpnt->channel,
- SCpnt->target,
- SCpnt->lun,
- kdevname(SCpnt->request.rq_dev),
- SCpnt->request.sector,
- SCpnt->request.nr_sectors,
- SCpnt->request.current_nr_sectors,
- SCpnt->use_sg,
- SCpnt->retries,
- SCpnt->allowed,
- SCpnt->flags,
- SCpnt->timeout_per_command,
- SCpnt->timeout,
- SCpnt->internal_timeout,
- SCpnt->cmnd[0],
- SCpnt->sense_buffer[2],
- SCpnt->result);
- }
- printk("wait_for_request = %p\n", wait_for_request);
- /* Now dump the request lists for each block device */
- printk("Dump of pending block device requests\n");
- for(i=0; i<MAX_BLKDEV; i++)
- if(blk_dev[i].current_request)
- {
- struct request * req;
- printk("%d: ", i);
- req = blk_dev[i].current_request;
- while(req) {
- printk("(%s %d %ld %ld %ld) ",
- kdevname(req->rq_dev),
- req->cmd,
- req->sector,
- req->nr_sectors,
- req->current_nr_sectors);
- req = req->next;
- }
- printk("\n");
- }
-}
-#endif
-
-#ifdef MODULE
-
-int init_module(void) {
- unsigned long size;
-
- /*
- * This makes /proc/scsi visible.
- */
-#if CONFIG_PROC_FS
- dispatch_scsi_info_ptr = dispatch_scsi_info;
-#endif
-
- timer_table[SCSI_TIMER].fn = scsi_main_timeout;
- timer_table[SCSI_TIMER].expires = 0;
- register_symtab(&scsi_symbol_table);
- scsi_loadable_module_flag = 1;
-
- /* Register the /proc/scsi/scsi entry */
-#if CONFIG_PROC_FS
- proc_scsi_register(0, &proc_scsi_scsi);
-#endif
-
-
- dma_sectors = PAGE_SIZE / SECTOR_SIZE;
- dma_free_sectors= dma_sectors;
- /*
- * Set up a minimal DMA buffer list - this will be used during scan_scsis
- * in some cases.
- */
-
- /* One bit per sector to indicate free/busy */
- size = (dma_sectors / SECTORS_PER_PAGE)*sizeof(FreeSectorBitmap);
- dma_malloc_freelist = (unsigned char *) scsi_init_malloc(size, GFP_ATOMIC);
- memset(dma_malloc_freelist, 0, size);
-
- /* One pointer per page for the page list */
- dma_malloc_pages = (unsigned char **)
- scsi_init_malloc((dma_sectors / SECTORS_PER_PAGE)*sizeof(*dma_malloc_pages), GFP_ATOMIC);
- dma_malloc_pages[0] = (unsigned char *)
- scsi_init_malloc(PAGE_SIZE, GFP_ATOMIC | GFP_DMA);
- return 0;
-}
-
-void cleanup_module( void)
-{
-#if CONFIG_PROC_FS
- proc_scsi_unregister(0, PROC_SCSI_SCSI);
-
- /* No, we're not here anymore. Don't show the /proc/scsi files. */
- dispatch_scsi_info_ptr = 0L;
-#endif
-
- /*
- * Free up the DMA pool.
- */
- resize_dma_pool();
-
- timer_table[SCSI_TIMER].fn = NULL;
- timer_table[SCSI_TIMER].expires = 0;
-}
-#endif /* MODULE */
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-indent-level: 4
- * c-brace-imaginary-offset: 0
- * c-brace-offset: -4
- * c-argdecl-indent: 4
- * c-label-offset: -4
- * c-continued-statement-offset: 4
- * c-continued-brace-offset: 0
- * indent-tabs-mode: nil
- * tab-width: 8
- * End:
- */
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-31 07:27:54 +0000