/* Update history:
Jan 15 1996: First public release.
+ - Martin Kolinek
Jan 23 1996: Scrapped code which reassigned scsi devices to logical
device numbers. Instead, the existing assignment (created
and also the hard disks are ordered under Linux the
same way as they are under dos (i.e., C: disk is sda,
D: disk is sdb, etc.).
+ - Martin Kolinek
I think that the CD-ROM is now detected only if a CD is
inside CD_ROM while Linux boots. This can be fixed later,
once the driver works on all types of PS/2's.
+ - Martin Kolinek
Feb 7 1996: Modified biosparam function. Fixed the CD-ROM detection.
For now, devices other than harddisk and CD_ROM are
ignored. Temporarily modified abort() function
- to behave like reset().
+ to behave like reset().
+ - Martin Kolinek
Mar 31 1996: The integrated scsi subsystem is correctly found
in PS/2 models 56,57, but not in model 76. Therefore
This function allows the user to force detection of
scsi subsystem. The kernel option has format
ibmmcascsi=n
- where n is the scsi_id (pun) of the subsystem. Most
- likely, n is 7.
+ where n is the scsi_id (pun) of the subsystem. Most likely, n is 7.
+ - Martin Kolinek
Aug 21 1996: Modified the code which maps ldns to (pun,0). It was
insufficient for those of us with CD-ROM changers.
- Chris Beauregard
-
- Mar 16 1997: Modified driver to run as a module and to support
- multiple adapters.
+
+ Dec 14 1996: More improvements to the ldn mapping. See check_devices
+ for details. Did more fiddling with the integrated SCSI detection,
+ but I think it's ultimately hopeless without actually testing the
+ model of the machine. The 56, 57, 76 and 95 (ultimedia) all have
+ different integrated SCSI register configurations. However, the 56
+ and 57 are the only ones that have problems with forced detection.
+ - Chris Beauregard
+
+ Mar 8-16 1997: Modified driver to run as a module and to support
+ multiple adapters. A structure, called ibmmca_hostdata, is now
+ present, containing all the variables, that were once only
+ available for one single adapter. The find_subsystem-routine has vanished.
+ The hardware recognition is now done in ibmmca_detect directly.
+ This routine checks for presence of MCA-bus, checks the interrupt
+ level and continues with checking the installed hardware.
+ Certain PS/2-models do not recognize a SCSI-subsystem automatically.
+ Hence, the setup defined by command-line-parameters is checked first.
+ Thereafter, the routine probes for an integrated SCSI-subsystem.
+ Finally, adapters are checked. This method has the advantage to cover all
+ possible combinations of multiple SCSI-subsystems on one MCA-board. Up to
+ eight SCSI-subsystems can be recognized and announced to the upper-level
+ drivers with this improvement. A set of defines made changes to other
+ routines as small as possible.
- Klaus Kudielka
- */
+
+ May 30 1997: (v1.5b)
+ 1) SCSI-command capability enlarged by the recognition of MODE_SELECT.
+ This needs the RD-Bit to be disabled on IM_OTHER_SCSI_CMD_CMD which
+ allows data to be written from the system to the device. It is a
+ necessary step to be allowed to set blocksize of SCSI-tape-drives and
+ the tape-speed, whithout confusing the SCSI-Subsystem.
+ 2) The recognition of a tape is included in the check_devices routine.
+ This is done by checking for TYPE_TAPE, that is already defined in
+ the kernel-scsi-environment. The markup of a tape is done in the
+ global ldn_is_tape[] array. If the entry on index ldn
+ is 1, there is a tapedrive connected.
+ 3) The ldn_is_tape[] array is necessary to distinguish between tape- and
+ other devices. Fixed blocklength devices should not cause a problem
+ with the SCB-command for read and write in the ibmmca_queuecommand
+ subroutine. Therefore, I only derivate the READ_XX, WRITE_XX for
+ the tape-devices, as recommended by IBM in this Technical Reference,
+ mentioned below. (IBM recommends to avoid using the read/write of the
+ subsystem, but the fact was, that read/write causes a command error from
+ the subsystem and this causes kernel-panic.)
+ 4) In addition, I propose to use the ldn instead of a fix char for the
+ display of PS2_DISK_LED_ON(). On 95, one can distinguish between the
+ devices that are accessed. It shows activity and easyfies debugging.
+ The tape-support has been tested with a SONY SDT-5200 and a HP DDS-2
+ (I do not know yet the type). Optimization and CD-ROM audio-support,
+ I am working on ...
+ - Michael Lang
+
+ June 19 1997: (v1.6b)
+ 1) Submitting the extra-array ldn_is_tape[] -> to the local ld[]
+ device-array.
+ 2) CD-ROM Audio-Play seems to work now.
+ 3) When using DDS-2 (120M) DAT-Tapes, mtst shows still density-code
+ 0x13 for ordinary DDS (61000 BPM) instead 0x24 for DDS-2. This appears
+ also on Adaptec 2940 adaptor in a PCI-System. Therefore, I assume that
+ the problem is independent of the low-level-driver/bus-architecture.
+ 4) Hexadecimal ldn on PS/2-95 LED-display.
+ 5) Fixing of the PS/2-LED on/off that it works right with tapedrives and
+ does not confuse the disk_rw_in_progress counter.
+ - Michael Lang
+
+ June 21 1997: (v1.7b)
+ 1) Adding of a proc_info routine to inform in /proc/scsi/ibmmca/<host> the
+ outer-world about operational load statistics on the different ldns,
+ seen by the driver. Everybody that has more than one IBM-SCSI should
+ test this, because I only have one and cannot see what happens with more
+ than one IBM-SCSI hosts.
+ 2) Definition of a driver version-number to have a better recognition of
+ the source when there are existing too much releases that may confuse
+ the user, when reading about release-specific problems. Up to know,
+ I calculated the version-number to be 1.7. Because we are in BETA-test
+ yet, it is today 1.7b.
+ 3) Sorry for the heavy bug I programmed on June 19 1997! After that, the
+ CD-ROM did not work any more! The C7-command was a fake impression
+ I got while programming. Now, the READ and WRITE commands for CD-ROM are
+ no longer running over the subsystem, but just over
+ IM_OTHER_SCSI_CMD_CMD. On my observations (PS/2-95), now CD-ROM mounts
+ much faster(!) and hopefully all fancy multimedia-functions, like direct
+ digital recording from audio-CDs also work. (I tried it with cdda2wav
+ from the cdwtools-package and it filled up the harddisk immediately :-).)
+ To easify boolean logics, a further local device-type in ld[], called
+ is_cdrom has been included.
+ 4) If one uses a SCSI-device of unsupported type/commands, one
+ immediately runs into a kernel-panic caused by Command Error. To better
+ understand which SCSI-command caused the problem, I extended this
+ specific panic-message slightly.
+ - Michael Lang
+
+ June 25 1997: (v1.8b)
+ 1) Some cosmetical changes for the handling of SCSI-device-types.
+ Now, also CD-Burners / WORMs and SCSI-scanners should work. For
+ MO-drives I have no experience, therefore not yet supported.
+ In logical_devices I changed from different type-variables to one
+ called 'device_type' where the values, corresponding to scsi.h,
+ of a SCSI-device are stored.
+ 2) There existed a small bug, that maps a device, coming after a SCSI-tape
+ wrong. Therefore, e.g. a CD-ROM changer would have been mapped wrong
+ -> problem removed.
+ 3) Extension of the logical_device structure. Now it contains also device,
+ vendor and revision-level of a SCSI-device for internal usage.
+ - Michael Lang
+
+ June 26-29 1997: (v2.0b)
+ 1) The release number 2.0b is necessary because of the completely new done
+ recognition and handling of SCSI-devices with the adapter. As I got
+ from Chris the hint, that the subsystem can reassign ldns dynamically,
+ I remembered this immediate_assign-command, I found once in the handbook.
+ Now, the driver first kills all ldn assignments that are set by default
+ on the SCSI-subsystem. After that, it probes on all puns and luns for
+ devices by going through all combinations with immediate_assign and
+ probing for devices, using device_inquiry. The found physical(!) pun,lun
+ structure is stored in get_scsi[][] as device types. This is followed
+ by the assignment of all ldns to existing SCSI-devices. If more ldns
+ than devices are available, they are assigned to non existing pun,lun
+ combinations to satisfy the adapter. With this, the dynamical mapping
+ was possible to implement. (For further info see the text in the
+ source-code and in the description below. Read the description
+ below BEFORE installing this driver on your system!)
+ 2) Changed the name IBMMCA_DRIVER_VERSION to IBMMCA_SCSI_DRIVER_VERSION.
+ 3) The LED-display shows on PS/2-95 no longer the ldn, but the SCSI-ID
+ (pun) of the accessed SCSI-device. This is now senseful, because the
+ pun known within the driver is exactly the pun of the physical device
+ and no longer a fake one.
+ 4) The /proc/scsi/ibmmca/<host_no> consists now of the first part, where
+ hit-statistics of ldns is shown and a second part, where the maps of
+ physical and logical SCSI-devices are displayed. This could be very
+ interesting, when one is using more than 15 SCSI-devices in order to
+ follow the dynamical remapping of ldns.
+ - Michael Lang
+
+ June 26-29 1997: (v2.0b-1)
+ 1) I forgot to switch the local_checking_phase_flag to 1 and back to 0
+ in the dynamical remapping part in ibmmca_queuecommand for the
+ device_exist routine. Sorry.
+ - Michael Lang
+
+ July 1-13 1997: (v3.0b,c)
+ 1) Merging of the driver-developments of Klaus Kudielka and Michael Lang
+ in order to get a optimum and unified driver-release for the
+ IBM-SCSI-Subsystem-Adapter(s).
+ For people, using the Kernel-release >=2.1.0, module-support should
+ be no problem. For users, running under <2.1.0, module-support may not
+ work, because the methods have changed between 2.0.x and 2.1.x.
+ 2) Added some more effective statistics for /proc-output.
+ 3) Change typecasting at necessary points from (unsigned long) to
+ virt_to_bus().
+ 4) Included #if... at special points to have specific adaption of the
+ driver to kernel 2.0.x and 2.1.x. It should therefore also run with
+ later releases.
+ 5) Magneto-Optical drives and medium-changers are also recognized, now.
+ Therefore, we have a completely gapfree recognition of all SCSI-
+ device-types, that are known by Linux up to kernel 2.1.31.
+ 6) The flag SCSI_IBMMCA_DEV_RESET has been inserted. If it is set within
+ the configuration, each connected SCSI-device will get a reset command
+ during boottime. This can be necessary for some special SCSI-devices.
+ This flag should be included in Config.in.
+ (See also the new Config.in file.)
+ Probable next improvement: bad disk handler.
+ - Michael Lang
+
+ Sept 14 1997: (v3.0c)
+ 1) Some debugging and speed optimization applied.
+ - Michael Lang
+
+
+
+ TODO:
+
+ - It seems that the handling of bad disks is really bad -
+ non-existent, in fact.
+ - More testing of the full driver-controlled dynamical ldn
+ (re)mapping for up to 56 SCSI-devices.
+ - Support more SCSI-device-types, if Linux defines more.
+ - Support more of the SCSI-command set.
+ - Support some of the caching abilities, particularly Read Prefetch.
+ This fetches data into the cache, which later gets hit by the
+ regular Read Data.
+ - Abort and Reset functions still slightly buggy. Especially when
+ floppydisk(!) operations report errors.
+
+******************************************************************************/
#include <linux/module.h>
-
-#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/head.h>
#include <linux/types.h>
#include "hosts.h"
#include "ibmmca.h"
+#include <linux/config.h> /* for CONFIG_SCSI_IBMMCA etc. */
+
/*--------------------------------------------------------------------*/
+/* current version of this driver-source: */
+#define IBMMCA_SCSI_DRIVER_VERSION "3.0d"
+
/*
Driver Description
ldn -> (ldn/8,ldn%8). We end up with a real mishmash of puns
and luns, but it all seems to work. - Chris Beaurgard
+ And that last paragraph is also no longer correct. It uses a
+ slightly more complex mapping that will always map hard disks to
+ (x,0), for some x, and consecutive none disk devices will usually
+ share puns.
+
+ Again, the last paragraphs are no longer correct. Now, the physical
+ SCSI-devices on the SCSI-bus are probed via immediate_assign- and
+ device_inquiry-commands. This delivers a exact map of the physical
+ SCSI-world that is now stored in the get_scsi[][]-array. This means,
+ that the once hidden pun,lun assignment is now known to this driver.
+ It no longer believes in default-settings of the subsystem and maps all
+ ldns to existing pun,lun by foot. This assures full control of the ldn
+ mapping and allows dynamical remapping of ldns to different pun,lun, if
+ there are more SCSI-devices installed than ldns available (n>15). The
+ ldns from 0 to 6 get 'hardwired' by this driver to puns 0 to 7 at lun=0,
+ excluding the pun of the subsystem. This assures, that at least simple
+ SCSI-installations have optimum access-speed and are not touched by
+ dynamical remapping. The ldns 7 to 14 are put to existing devices with
+ lun>0 or to non-existing devices, in order to satisfy the subsystem, if
+ there are less than 15 SCSI-devices connected. In the case of more than 15
+ devices, the dynamical mapping goes active. If the get_scsi[][] reports a
+ device to be existant, but it has no ldn assigned, it gets a ldn out of 7
+ to 14. The numbers are assigned in cyclic order. Therefore it takes 8
+ dynamical assignments on SCSI-devices, until a certain device
+ looses its ldn again. This assures, that dynamical remapping is avoided
+ during intense I/O between up to eight SCSI-devices (means pun,lun
+ combinations). A further advantage of this method is, that people who
+ build their kernel without probing on all luns will get what they expect.
+
+ IMPORTANT: Because of the now correct recognition of physical pun,lun, and
+ their report to mid-level- and higher-level-drivers, the new reported puns
+ can be different from the old, faked puns. Therefore, Linux will eventually
+ change /dev/sdXXX assignments and prompt you for corrupted superblock
+ repair on boottime. In this case DO NOT PANIC, YOUR DISKS ARE STILL OK!!!
+ You have to reboot (CTRL-D) with a old kernel and set the /etc/fstab-file
+ entries right. After that, the system should come up as errorfree as before.
+ If your boot-partition is not coming up, also edit the /etc/lilo.conf-file
+ in a Linux session booted on old kernel and run lilo before reboot. Check
+ lilo.conf anyway to get boot on other partitions with foreign OSes right
+ again.
+
(C) Regular Processing
Only three functions get involved: ibmmca_queuecommand(), issue_cmd(),
and interrupt_handler().
ibmmca_queuecommand(). This function fills a "subsystem control block"
(scb) and calls a local function issue_cmd(), which writes a scb
command into subsystem I/O ports. Once the scb command is carried out,
- interrupt_handler() is invoked.
+ interrupt_handler() is invoked. If a device is determined to be existant
+ and it has not assigned any ldn, it gets one dynamically.
(D) Abort, Reset.
These are implemented with busy waiting for interrupt to arrive.
100% sure that it is correct for larger disks.
(F) Kernel Boot Option
- The function ibmmca_scsi_setup() is called if option ibmmcascsi=...
+ The function ibmmca_scsi_setup() is called if option ibmmcascsi=n
is passed to the kernel. See file linux/init/main.c for details.
+
+ (G) Driver Module Support
+ Is implemented and tested by K. Kudielka. This could probably not work
+ on kernels <2.1.0.
+
+ (H) Multiple Hostadapter Support
+ This driver supports up to eight interfaces of type IBM-SCSI-Subsystem.
+ Integrated-, and MCA-adapters are automatically recognized. Unrecognizable
+ IBM-SCSI-Subsystem interfaces can be specified as kernel-parameters.
+
+ (I) /proc-Filesystem Information
+ Information about the driver condition is given in
+ /proc/scsi/ibmmca/<host_no>. ibmmca_proc_info provides this information.
*/
/*--------------------------------------------------------------------*/
-
/* Here are the values and structures specific for the subsystem.
* The source of information is "Update for the PS/2 Hardware
* Interface Technical Reference, Common Interfaces", September 1991,
* In addition to SCSI subsystem, this update contains fairly detailed
* (at hardware register level) sections on diskette controller,
* keyboard controller, serial port controller, VGA, and XGA.
+ *
+ * Additional information from "Personal System/2 Micro Channel SCSI
+ * Adapter with Cache Technical Reference", March 1990, PN 68X2365,
+ * probably available from the same source (or possibly found buried
+ * in officemates desk).
+ *
+ * Further literature/program-sources referred for this driver:
+ *
+ * Friedhelm Schmidt, "SCSI-Bus und IDE-Schnittstelle - Moderne Peripherie-
+ * Schnittstellen: Hardware, Protokollbeschreibung und Anwendung", 2. Aufl.
+ * Addison Wesley, 1996.
+ *
+ * Michael K. Johnson, "The Linux Kernel Hackers' Guide", Version 0.6, Chapel
+ * Hill - North Carolina, 1995
+ *
+ * Andreas Kaiser, "SCSI TAPE BACKUP for OS/2 2.0", Version 2.12, Stuttgart
+ * 1993
*/
+/*--------------------------------------------------------------------*/
+
/* driver configuration */
#define IM_MAX_HOSTS 8 /* maximum number of host adapters */
#define IM_RESET_DELAY 10 /* seconds allowed for a reset */
/* driver debugging - #undef all for normal operation */
-#undef IM_DEBUG_TIMEOUT 50 /* if defined: count interrupts
- and ignore this special one */
-#undef IM_DEBUG_INT /* verbose interrupt */
-#undef IM_DEBUG_CMD /* verbose queuecommand */
-
-/* addresses of hardware registers on the subsystem */
-#define IM_CMD_REG (shpnt->io_port) /*Command Interface, (4 bytes long) */
-#define IM_ATTN_REG (shpnt->io_port+4) /*Attention (1 byte) */
-#define IM_CTR_REG (shpnt->io_port+5) /*Basic Control (1 byte) */
-#define IM_INTR_REG (shpnt->io_port+6) /*Interrupt Status (1 byte, r/o) */
-#define IM_STAT_REG (shpnt->io_port+7) /*Basic Status (1 byte, read only) */
+/* if defined: count interrupts and ignore this special one: */
+#undef IM_DEBUG_TIMEOUT 50
+/* verbose interrupt: */
+#undef IM_DEBUG_INT
+/* verbose queuecommand: */
+#undef IM_DEBUG_CMD
+/* verbose queucommand for specific SCSI-device type: */
+#undef IM_DEBUG_CMD_SPEC_DEV
+/* verbose device probing */
+#undef IM_DEBUG_PROBE
+
+/* device type that shall be displayed on syslog (only during debugging): */
+#define IM_DEBUG_CMD_DEVICE TYPE_TAPE
+
+/* relative addresses of hardware registers on a subsystem */
+#define IM_CMD_REG (shpnt->io_port) /*Command Interface, (4 bytes long) */
+#define IM_ATTN_REG (shpnt->io_port+4) /*Attention (1 byte) */
+#define IM_CTR_REG (shpnt->io_port+5) /*Basic Control (1 byte) */
+#define IM_INTR_REG (shpnt->io_port+6) /*Interrupt Status (1 byte, r/o) */
+#define IM_STAT_REG (shpnt->io_port+7) /*Basic Status (1 byte, read only) */
+
+/* basic I/O-port of first adapter */
#define IM_IO_PORT 0x3540
+/* maximum number of hosts that can be find */
#define IM_N_IO_PORT 8
/*requests going into the upper nibble of the Attention register */
/*immediate commands (word written into low 2 bytes of command reg) */
#define IM_RESET_IMM_CMD 0x0400
-#define IM_FORMAT_PREP_IMM_CMD 0x0417
#define IM_FEATURE_CTR_IMM_CMD 0x040c
#define IM_DMA_PACING_IMM_CMD 0x040d
#define IM_ASSIGN_IMM_CMD 0x040e
#define IM_ABORT_IMM_CMD 0x040f
+#define IM_FORMAT_PREP_IMM_CMD 0x0417
/*SCB (Subsystem Control Block) structure */
struct im_scb
#define IM_DEVICE_INQUIRY_CMD 0x1c0b
#define IM_OTHER_SCSI_CMD_CMD 0x241f
+/* unused, but supported, SCB commands */
+#define IM_GET_COMMAND_COMPLETE_STATUS_CMD 0x1c07 /* command status */
+#define IM_GET_POS_INFO_CMD 0x1c0a /* returns neat stuff */
+#define IM_READ_PREFETCH_CMD 0x1c31 /* caching controller only */
+#define IM_FOMAT_UNIT_CMD 0x1c16 /* format unit */
+#define IM_REASSIGN_BLOCK_CMD 0x1c18 /* in case of error */
+
/*values to set bits in the enable word of SCB */
#define IM_READ_CONTROL 0x8000
#define IM_REPORT_TSB_ONLY_ON_ERROR 0x4000
/*subsystem uses interrupt request level 14 */
#define IM_IRQ 14
-/*PS2 disk led is turned on/off by bits 6,7 of system control port */
-#define PS2_SYS_CTR 0x92
-#define PS2_DISK_LED_ON() outb(inb(PS2_SYS_CTR) | 0xc0, PS2_SYS_CTR)
-#define PS2_DISK_LED_OFF() outb(inb(PS2_SYS_CTR) & 0x3f, PS2_SYS_CTR)
+/*--------------------------------------------------------------------*/
+/*
+ The model 95 doesn't have a standard activity light. Instead it
+ has a row of LEDs on the front. We use the last one as the activity
+ indicator if we think we're on a model 95. I suspect the model id
+ check will be either too narrow or too general, and some machines
+ won't have an activity indicator. Oh well...
+
+ The regular PS/2 disk led is turned on/off by bits 6,7 of system
+ control port.
+*/
+
+/* LED display-port (actually, last LED on display) */
+#define MOD95_LED_PORT 0x108
+/* system-control-register of PS/2s with diskindicator */
+#define PS2_SYS_CTR 0x92
+
+/* The SCSI-ID(!) of the accessed SCSI-device is shown on PS/2-95 machines' LED
+ displays. ldn is no longer displayed here, because the ldn mapping is now
+ done dynamically and the ldn <-> pun,lun maps can be looked-up at boottime
+ or during uptime in /proc/scsi/ibmmca/<host_no> in case of trouble,
+ interest, debugging or just for having fun. The left number gives the
+ host-adapter number and the right shows the accessed SCSI-ID. */
+
+#define PS2_DISK_LED_ON(ad,id) {\
+ if( machine_id == 0xf8 ) { outb((char)(id+48), MOD95_LED_PORT ); \
+ outb((char)(ad+48), MOD95_LED_PORT+1); } \
+ else outb(inb(PS2_SYS_CTR) | 0xc0, PS2_SYS_CTR); \
+}
+
+#define PS2_DISK_LED_OFF() {\
+ if( machine_id == 0xf8 ) { outb( ' ', MOD95_LED_PORT ); \
+ outb(' ', MOD95_LED_PORT+1); } \
+ else outb(inb(PS2_SYS_CTR) | 0x3f, PS2_SYS_CTR); \
+}
/*--------------------------------------------------------------------*/
S_IFDIR | S_IRUGO | S_IXUGO, 2
};
-/*max number of logical devices (can be up to 15) */
+/* Max number of logical devices (can be up from 0 to 14). 15 is the address
+of the adapter itself. */
#define MAX_LOG_DEV 15
/*local data for a logical device */
struct im_scb scb;
struct im_tsb tsb;
struct im_sge sge[16];
- Scsi_Cmnd *cmd;
- int is_disk;
+ Scsi_Cmnd *cmd; /* SCSI-command that is currently in progress */
+
+ int device_type; /* type of the SCSI-device. See include/scsi/scsi.h
+ for interpreation of the possible values */
int block_length;
};
+/* statistics of the driver during operations (for proc_info) */
+struct Driver_Statistics
+ {
+ /* SCSI statistics on the adapter */
+ int ldn_access[MAX_LOG_DEV+1]; /* total accesses on a ldn */
+ int ldn_read_access[MAX_LOG_DEV+1]; /* total read-access on a ldn */
+ int ldn_write_access[MAX_LOG_DEV+1]; /* total write-access on a ldn */
+ int total_accesses; /* total accesses on all ldns */
+ int total_interrupts; /* total interrupts (should be
+ same as total_accesses) */
+ /* dynamical assignment statistics */
+ int total_scsi_devices; /* number of physical pun,lun */
+ int dyn_flag; /* flag showing dynamical mode */
+ int dynamical_assignments; /* number of remappings of ldns */
+ int ldn_assignments[MAX_LOG_DEV+1]; /* number of remappings of each
+ ldn */
+ };
+
/* data structure for each host adapter */
struct ibmmca_hostdata
- {
- /* array of logical devices */
+{
+ /* array of logical devices */
struct logical_device _ld[MAX_LOG_DEV];
- /* array to convert (pun, lun) into logical device number */
+ /* array to convert (pun, lun) into logical device number */
unsigned char _get_ldn[8][8];
- /* used only when checking logical devices */
+ /*array that contains the information about the physical SCSI-devices
+ attached to this host adapter */
+ unsigned char _get_scsi[8][8];
+ /* used only when checking logical devices */
int _local_checking_phase_flag;
int _got_interrupt;
int _stat_result;
- /* reset status (used only when doing reset) */
+ /* reset status (used only when doing reset) */
int _reset_status;
- };
-
-/* reset status values */
-#define IM_RESET_NOT_IN_PROGRESS 0
-#define IM_RESET_IN_PROGRESS 1
-#define IM_RESET_FINISHED_OK 2
-#define IM_RESET_FINISHED_FAIL 3
+ /* code of the last SCSI command (needed for panic info) */
+ int _last_scsi_command;
+ /* counter that points on next reassignable ldn for dynamical remapping */
+ /* The default value is 7, that is the first reassignable number in
+ the list on startup. */
+ int _next_ldn;
+ /* Statistics for this IBM-SCSI-host */
+ struct Driver_Statistics _IBM_DS;
+};
/* macros to access host data structure */
#define HOSTDATA(shpnt) ((struct ibmmca_hostdata *) shpnt->hostdata)
#define subsystem_pun (shpnt->this_id)
#define ld (HOSTDATA(shpnt)->_ld)
#define get_ldn (HOSTDATA(shpnt)->_get_ldn)
+#define get_scsi (HOSTDATA(shpnt)->_get_scsi)
#define local_checking_phase_flag (HOSTDATA(shpnt)->_local_checking_phase_flag)
#define got_interrupt (HOSTDATA(shpnt)->_got_interrupt)
#define stat_result (HOSTDATA(shpnt)->_stat_result)
#define reset_status (HOSTDATA(shpnt)->_reset_status)
+#define last_scsi_command (HOSTDATA(shpnt)->_last_scsi_command)
+#define next_ldn (HOSTDATA(shpnt)->_next_ldn)
+#define IBM_DS (HOSTDATA(shpnt)->_IBM_DS)
+
+/* Define a arbitrary number as subsystem-marker-type. This number is, as
+ described in the SCSI-Standard, not occupied by other device-types. */
+#define TYPE_IBM_SCSI_ADAPTER 0x2F
+
+/* Define 0xFF for no device type, because this type is not defined within
+ the SCSI-standard, therefore, it can be used and should not cause any
+ harm. */
+#define TYPE_NO_DEVICE 0xFF
+
+/* define medium-changer. If this is not defined previously, define
+ this type here. */
+#ifndef TYPE_MEDIUM_CHANGER
+#define TYPE_MEDIUM_CHANGER 0x08
+#endif
-/*--------------------------------------------------------------------*/
+/* define operations for immediate_assign */
+#define SET_LDN 0
+#define REMOVE_LDN 1
+
+/* reset status flag contents */
+#define IM_RESET_NOT_IN_PROGRESS 0
+#define IM_RESET_IN_PROGRESS 1
+#define IM_RESET_FINISHED_OK 2
+#define IM_RESET_FINISHED_FAIL 3
+
+/*-----------------------------------------------------------------------*/
/* if this is nonzero, ibmmcascsi option has been passed to the kernel */
-static int io_port[IM_MAX_HOSTS] = { 0 };
-static int scsi_id[IM_MAX_HOSTS] = { 7 };
+static int io_port[IM_MAX_HOSTS] = { 0, 0, 0, 0, 0, 0, 0, 0 };
+static int scsi_id[IM_MAX_HOSTS] = { 7, 7, 7, 7, 7, 7, 7, 7 };
+/* fill module-parameters only, when this define is present.
+ (that is kernel >=2.1.0) */
+#ifdef MODULE_PARM
MODULE_PARM(io_port, "1-" __MODULE_STRING(IM_MAX_HOSTS) "i");
-MODULE_PARM(scsi_id, "1-" __MODULE_STRING(IM_MAX_HOSTS) "i");
+MODULE_PARM(scsi_id, "1-" __MODULE_STRING(IM_MAX_HOSTS) "i");
+#endif
/*counter of concurrent disk read/writes, to turn on/off disk led */
static int disk_rw_in_progress = 0;
/* host information */
static int found = 0;
static struct Scsi_Host *hosts[IM_MAX_HOSTS+1] = { NULL };
+/*-----------------------------------------------------------------------*/
-/*--------------------------------------------------------------------*/
-
-/*local functions */
-static void interrupt_handler (int irq, void *dev_id,
- struct pt_regs *regs);
-static void issue_cmd (struct Scsi_Host *shpnt, unsigned long cmd_reg,
- unsigned char attn_reg);
+/*local functions in forward declaration */
+static void interrupt_handler (int irq, void *dev_id, struct pt_regs *regs);
+static void issue_cmd (struct Scsi_Host *shpnt, unsigned long cmd_reg,
+ unsigned char attn_reg);
static void internal_done (Scsi_Cmnd * cmd);
static void check_devices (struct Scsi_Host *shpnt);
-static int device_exists (struct Scsi_Host *shpnt, int ldn, int *is_disk,
- int *block_length);
-static struct Scsi_Host *ibmmca_register(Scsi_Host_Template * template,
+static int immediate_assign(struct Scsi_Host *shpnt, unsigned int pun,
+ unsigned int lun, unsigned int ldn,
+ unsigned int operation);
+static int device_inquiry(struct Scsi_Host *shpnt, int ldn,
+ unsigned char *buf);
+static char *ti_p(int value);
+static char *ti_l(int value);
+static int device_exists (struct Scsi_Host *shpnt, int ldn, int *block_length,
+ int *device_type);
+static struct Scsi_Host *ibmmca_register(Scsi_Host_Template * template,
int port, int id);
+/* local functions needed for proc_info */
+static int ldn_access_load(struct Scsi_Host *shpnt, int ldn);
+static int ldn_access_total_read_write(struct Scsi_Host *shpnt);
+
/*--------------------------------------------------------------------*/
static void
-interrupt_handler (int irq, void *dev_id,
- struct pt_regs *regs)
+interrupt_handler (int irq, void *dev_id, struct pt_regs *regs)
{
int i = 0;
struct Scsi_Host *shpnt;
unsigned int cmd_result;
unsigned int ldn;
- do shpnt = hosts[i++];
+ /* search for one adapter-response on shared interrupt */
+ do
+ shpnt = hosts[i++];
while (shpnt && !(inb(IM_STAT_REG) & IM_INTR_REQUEST));
+
+ /* return if some other device on this IRQ caused the interrupt */
if (!shpnt) return;
/*get command result and logical device */
- intr_reg = inb(IM_INTR_REG);
+ intr_reg = inb (IM_INTR_REG);
cmd_result = intr_reg & 0xf0;
ldn = intr_reg & 0x0f;
/*must wait for attention reg not busy, then send EOI to subsystem */
- while (1)
- {
+ while (1) {
cli ();
- if (!(inb (IM_STAT_REG) & IM_BUSY))
- break;
+ if (!(inb (IM_STAT_REG) & IM_BUSY))
+ break;
sti ();
}
outb (IM_EOI | ldn, IM_ATTN_REG);
/*these should never happen (hw fails, or a local programming bug) */
if (cmd_result == IM_ADAPTER_HW_FAILURE)
- panic ("IBM MCA SCSI: subsystem hardware failure.\n");
+ panic ("IBM MCA SCSI: subsystem hardware failure. Last SCSI_CMD=0x%X. \n",
+ last_scsi_command);
if (cmd_result == IM_CMD_ERROR)
- panic ("IBM MCA SCSI: command error.\n");
+ panic ("IBM MCA SCSI: command error. Last SCSI_CMD=0x%X. \n",
+ last_scsi_command);
if (cmd_result == IM_SOFTWARE_SEQUENCING_ERROR)
- panic ("IBM MCA SCSI: software sequencing error.\n");
+ panic ("IBM MCA SCSI: software sequencing error. Last SCSI_CMD=0x%X. \n",
+ last_scsi_command);
+ /* if no panic appeared, increase the interrupt-counter */
+ IBM_DS.total_interrupts++;
+
/*only for local checking phase */
if (local_checking_phase_flag)
{
stat_result = cmd_result;
got_interrupt = 1;
+ reset_status = IM_RESET_FINISHED_OK;
return;
}
}
else
{
+ /*reset disk led counter, turn off disk led */
+ disk_rw_in_progress = 0;
+ PS2_DISK_LED_OFF ();
reset_status = IM_RESET_FINISHED_OK;
}
return;
#ifdef IM_DEBUG_TIMEOUT
{
- static int count = 0;
+ static int count = 0;
- if (++count == IM_DEBUG_TIMEOUT) {
- printk("IBM MCA SCSI: Ignoring interrupt.\n");
- return;
- }
+ if (++count == IM_DEBUG_TIMEOUT) {
+ printk("IBM MCA SCSI: Ignoring interrupt.\n");
+ return;
+ }
}
#endif
#ifdef IM_DEBUG_INT
printk("cmd=%02x ireg=%02x ds=%02x cs=%02x de=%02x ce=%02x\n",
- cmd->cmnd[0], intr_reg,
- ld[ldn].tsb.dev_status, ld[ldn].tsb.cmd_status,
- ld[ldn].tsb.dev_error, ld[ldn].tsb.cmd_error);
+ cmd->cmnd[0], intr_reg,
+ ld[ldn].tsb.dev_status, ld[ldn].tsb.cmd_status,
+ ld[ldn].tsb.dev_error, ld[ldn].tsb.cmd_error);
#endif
- /*if this is end of disk read/write, may turn off PS/2 disk led */
- if (ld[ldn].is_disk)
- {
+ /*if this is end of media read/write, may turn off PS/2 disk led */
+ if ((ld[ldn].device_type!=TYPE_NO_LUN)&&
+ (ld[ldn].device_type!=TYPE_NO_DEVICE))
+ { /* only access this, if there was a valid device addressed */
switch (cmd->cmnd[0])
{
case READ_6:
case WRITE_6:
case READ_10:
case WRITE_10:
+ case READ_12:
+ case WRITE_12:
if (--disk_rw_in_progress == 0)
PS2_DISK_LED_OFF ();
}
}
-
+
/*write device status into cmd->result, and call done function */
if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE)
cmd->result = ld[ldn].tsb.dev_status & 0x1e;
/*--------------------------------------------------------------------*/
static void
-issue_cmd (struct Scsi_Host *shpnt, unsigned long cmd_reg,
- unsigned char attn_reg)
+issue_cmd (struct Scsi_Host *shpnt, unsigned long cmd_reg,
+ unsigned char attn_reg)
{
/*must wait for attention reg not busy */
while (1)
/*--------------------------------------------------------------------*/
-static int
-ibmmca_getinfo (char *buf, int slot, void *dev)
+static int ibmmca_getinfo (char *buf, int slot, void *dev)
{
struct Scsi_Host *shpnt = dev;
int len = 0;
len += sprintf (buf + len, "Subsystem PUN: %d\n", subsystem_pun);
- len += sprintf (buf + len, "I/O base address: 0x%x\n", shpnt->io_port);
+ len += sprintf (buf + len, "I/O base address: 0x%x\n", IM_CMD_REG);
return len;
}
/*--------------------------------------------------------------------*/
-static void
-check_devices(struct Scsi_Host *shpnt)
-{
- int is_disk, block_length;
- int ldn;
- int num_ldn = 0;
-
- /* check ldn's from 0 to MAX_LOG_DEV to find which devices exist */
- for (ldn = 0; ldn < MAX_LOG_DEV; ldn++)
- {
- if (device_exists(shpnt, ldn, &is_disk, &block_length))
- {
- printk("IBM MCA SCSI: logical device found at ldn=%d.\n", ldn);
- ld[ldn].is_disk = is_disk;
- ld[ldn].block_length = block_length;
- get_ldn[num_ldn / 8][num_ldn % 8] = ldn;
- num_ldn++;
- }
- }
-
- return;
-}
-
-/*--------------------------------------------------------------------*/
-
-static int
-device_exists(struct Scsi_Host *shpnt, int ldn, int *is_disk,
- int *block_length)
-{
+/* SCSI-SCB-command for device_inquiry */
+static int device_inquiry(struct Scsi_Host *shpnt, int ldn, unsigned char *buf)
+{
struct im_scb scb;
struct im_tsb tsb;
- unsigned char buf[256];
int retries;
for (retries = 0; retries < 3; retries++)
/*fill scb with inquiry command */
scb.command = IM_DEVICE_INQUIRY_CMD;
scb.enable = IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT;
- /* I think this virt_to_bus is needed.. ??? AC */
scb.sys_buf_adr = virt_to_bus(buf);
scb.sys_buf_length = 255;
scb.tsb_adr = virt_to_bus(&tsb);
/*if all three retries failed, return "no device at this ldn" */
if (retries >= 3)
return 0;
+ else
+ return 1;
+}
+
+/* SCSI-immediate-command for assign. This functions maps/unmaps specific
+ ldn-numbers on SCSI (PUN,LUN). It is needed for presetting of the
+ subsystem and for dynamical remapping od ldns. */
+static int immediate_assign(struct Scsi_Host *shpnt, unsigned int pun,
+ unsigned int lun, unsigned int ldn,
+ unsigned int operation)
+{
+ int retries;
+ unsigned long imm_command;
+
+ for (retries=0; retries<3; retries ++)
+ {
+ imm_command = inl(IM_CMD_REG);
+ imm_command &= (unsigned long)(0xF8000000); /* keep reserved bits */
+ imm_command |= (unsigned long)(IM_ASSIGN_IMM_CMD);
+ imm_command |= (unsigned long)((lun & 7) << 24);
+ imm_command |= (unsigned long)((operation & 1) << 23);
+ imm_command |= (unsigned long)((pun & 7) << 20);
+ imm_command |= (unsigned long)((ldn & 15) << 16);
+
+ got_interrupt = 0;
+ issue_cmd (shpnt, (unsigned long)(imm_command), IM_IMM_CMD | 0xf);
+ while (!got_interrupt)
+ barrier ();
+
+ /*if command succesful, break */
+ if (stat_result == IM_IMMEDIATE_CMD_COMPLETED)
+ break;
+ }
+
+ if (retries >= 3)
+ return 0;
+ else
+ return 1;
+}
+
+/* type-interpreter for physical device numbers */
+static char *ti_p(int value)
+{
+ switch (value)
+ {
+ case TYPE_IBM_SCSI_ADAPTER: return("A"); break;
+ case TYPE_DISK: return("D"); break;
+ case TYPE_TAPE: return("T"); break;
+ case TYPE_PROCESSOR: return("P"); break;
+ case TYPE_WORM: return("W"); break;
+ case TYPE_ROM: return("R"); break;
+ case TYPE_SCANNER: return("S"); break;
+ case TYPE_MOD: return("M"); break;
+ case TYPE_MEDIUM_CHANGER: return("C"); break;
+ case TYPE_NO_LUN: return("+"); break; /* show NO_LUN */
+ case TYPE_NO_DEVICE:
+ default: return("-"); break;
+ }
+ return("-");
+}
+
+/* type-interpreter for logical devices
+ (A bit stupid, but it was necessary to get the '-' and the Hex-codes
+ into one type.) */
+static char *ti_l(int value)
+{
+ switch (value)
+ {
+ case 0: return("0"); break; case 1: return("1"); break;
+ case 2: return("2"); break; case 3: return("3"); break;
+ case 4: return("4"); break; case 5: return("5"); break;
+ case 6: return("6"); break; case 7: return("7"); break;
+ case 8: return("8"); break; case 9: return("9"); break;
+ case 10: return("a"); break; case 11: return("b"); break;
+ case 12: return("c"); break; case 13: return("d"); break;
+ case 14: return("e"); break; case 15: return("f"); break;
+ default: return("-"); break;
+ }
+ return("-");
+}
+
+/*
+ The following routine probes the SCSI-devices in four steps:
+ 1. The current ldn -> pun,lun mapping is removed on the SCSI-adapter.
+ 2. ldn 0 is used to go through all possible combinations of pun,lun and
+ a device_inquiry is done to fiddle out whether there is a device
+ responding or not. This physical map is stored in get_scsi[][].
+ 3. The 15 available ldns (0-14) are mapped to existing pun,lun.
+ If there are more devices than ldns, it stops at 14 for the boot
+ time. Dynamical remapping will be done in ibmmca_queuecommand.
+ 4. If there are less than 15 valid pun,lun, the remaining ldns are
+ mapped to NON-existing pun,lun to satisfy the adapter. Information
+ about pun,lun -> ldn is stored as before in get_ldn[][].
+ This method leads to the result, that the SCSI-pun,lun shown to Linux
+ mid-level- and higher-level-drivers is exactly corresponding to the
+ physical reality on the SCSI-bus. Therefore, it is possible that users
+ of older releases of this driver have to rewrite their fstab-file, because
+ the /dev/sdXXX could have changed due to the right pun,lun report, now.
+ The assignment of ALL ldns avoids dynamical remapping by the adapter
+ itself.
+ */
+static void check_devices (struct Scsi_Host *shpnt)
+{
+ int id, lun, ldn;
+ unsigned char buf[256];
+ int count_devices = 0; /* local counter for connected device */
+
+ /* assign default values to certain variables */
+
+ IBM_DS.dyn_flag = 0; /* normally no need for dynamical ldn management */
+ next_ldn = 7; /* next ldn to be assigned is 7, because 0-6 is 'hardwired'*/
+ last_scsi_command = 0; /* emptify last SCSI-command storage */
+
+ /* initialize the very important driver-informational arrays/structs */
+ memset (ld, 0, sizeof ld);
+ memset (get_ldn, TYPE_NO_DEVICE, sizeof get_ldn); /* this is essential ! */
+ memset (get_scsi, TYPE_NO_DEVICE, sizeof get_scsi); /* this is essential ! */
+
+ for (lun=0; lun<=7; lun++) /* mark the adapter at its pun on all luns*/
+ {
+ get_scsi[subsystem_pun][lun] = TYPE_IBM_SCSI_ADAPTER;
+ get_ldn[subsystem_pun][lun] = MAX_LOG_DEV; /* make sure, the subsystem
+ ldn is active for all
+ luns. */
+ }
+
+ /* STEP 1: */
+ printk("IBM MCA SCSI: Removing current logical SCSI-device mapping.");
+ for (ldn=0; ldn<MAX_LOG_DEV; ldn++)
+ {
+#ifdef IM_DEBUG_PROBE
+ printk(".");
+#endif
+ immediate_assign(shpnt,0,0,ldn,REMOVE_LDN); /* remove ldn (wherever)*/
+ }
+
+ lun = 0;
+
+ /* STEP 2: */
+ printk("\nIBM MCA SCSI: Probing SCSI-devices.");
+ for (id=0; id<=7; id++)
+#ifdef CONFIG_SCSI_MULTI_LUN
+ for (lun=0; lun<=7; lun++)
+#endif
+ {
+#ifdef IM_DEBUG_PROBE
+ printk(".");
+#endif
+ if (id != subsystem_pun)
+ { /* if pun is not the adapter: */
+ immediate_assign(shpnt,id,lun,0,SET_LDN); /*set ldn=0 to pun,lun*/
+ if (device_inquiry(shpnt, 0, buf)) /* probe device */
+ {
+ get_scsi[id][lun]=(unsigned char)buf[0]; /* entry, even
+ for NO_LUN */
+ if (buf[0] != TYPE_NO_LUN)
+ count_devices++; /* a existing device is found */
+ }
+ immediate_assign(shpnt,id,lun,0,REMOVE_LDN); /* remove ldn */
+ }
+ }
+
+ /* STEP 3: */
+ printk("\nIBM MCA SCSI: Mapping SCSI-devices.");
+
+ ldn = 0;
+ lun = 0;
+
+#ifdef CONFIG_SCSI_MULTI_LUN
+ for (lun=0; lun<=7 && ldn<MAX_LOG_DEV; lun++)
+#endif
+ for (id=0; id<=7 && ldn<MAX_LOG_DEV; id++)
+ {
+#ifdef IM_DEBUG_PROBE
+ printk(".");
+#endif
+ if (id != subsystem_pun)
+ {
+ if (get_scsi[id][lun] != TYPE_NO_LUN &&
+ get_scsi[id][lun] != TYPE_NO_DEVICE)
+ {
+ /* Only map if accepted type. Always enter for
+ lun == 0 to get no gaps into ldn-mapping for ldn<7. */
+ immediate_assign(shpnt,id,lun,ldn,SET_LDN);
+ get_ldn[id][lun]=ldn; /* map ldn */
+ if (device_exists (shpnt, ldn, &ld[ldn].block_length,
+ &ld[ldn].device_type))
+ {
+#ifdef SCSI_IBMMCA_DEV_RESET
+ int ticks;
+ printk("(resetting)");
+ ticks = IM_RESET_DELAY*HZ;
+ reset_status = IM_RESET_IN_PROGRESS;
+ issue_cmd (shpnt, IM_RESET_IMM_CMD, IM_IMM_CMD | ldn);
+ while (reset_status == IM_RESET_IN_PROGRESS && --ticks)
+ {
+ udelay(1000000/HZ);
+ barrier();
+ }
+ /* if reset did not complete, just claim */
+ if (!ticks)
+ {
+ printk("IBM MCA SCSI: reset did not complete within %d seconds.\n",
+ IM_RESET_DELAY);
+ reset_status = IM_RESET_FINISHED_OK;
+ /* did not work, finish */
+ }
+#endif
+ ldn++;
+ }
+ else
+ {
+ /* device vanished, probably because we don't know how to
+ * handle it or because it has problems */
+ if (lun > 0)
+ {
+ /* remove mapping */
+ get_ldn[id][lun]=TYPE_NO_DEVICE;
+ immediate_assign(shpnt,0,0,ldn,REMOVE_LDN);
+ }
+ else ldn++;
+ }
+ }
+ else if (lun == 0)
+ {
+ /* map lun == 0, even if no device exists */
+ immediate_assign(shpnt,id,lun,ldn,SET_LDN);
+ get_ldn[id][lun]=ldn; /* map ldn */
+ ldn++;
+ }
+ }
+ }
+
+ /* STEP 4: */
+
+ /* map remaining ldns to non-existing devices */
+ for (lun=1; lun<=7 && ldn<MAX_LOG_DEV; lun++)
+ for (id=0; id<=7 && ldn<MAX_LOG_DEV; id++)
+ {
+ if (get_scsi[id][lun] == TYPE_NO_LUN ||
+ get_scsi[id][lun] == TYPE_NO_DEVICE)
+ {
+ /* Map remaining ldns only to NON-existing pun,lun
+ combinations to make sure an inquiry will fail.
+ For MULTI_LUN, it is needed to avoid adapter autonome
+ SCSI-remapping. */
+ immediate_assign(shpnt,id,lun,ldn,SET_LDN);
+ get_ldn[id][lun]=ldn;
+ ldn++;
+ }
+ }
+
+ printk("\n");
+
+#ifdef IM_DEBUG_PROBE
+ /* Show the physical and logical mapping during boot. */
+ printk("IBM MCA SCSI: Determined SCSI-device-mapping:\n");
+ printk(" Physical SCSI-Device Map Logical SCSI-Device Map\n");
+ printk("ID\\LUN 0 1 2 3 4 5 6 7 ID\\LUN 0 1 2 3 4 5 6 7\n");
+ for (id=0; id<=7; id++)
+ {
+ printk("%2d %2s %2s %2s %2s %2s %2s %2s %2s",
+ id, ti_p(get_scsi[id][0]), ti_p(get_scsi[id][1]),
+ ti_p(get_scsi[id][2]), ti_p(get_scsi[id][3]),
+ ti_p(get_scsi[id][4]), ti_p(get_scsi[id][5]),
+ ti_p(get_scsi[id][6]), ti_p(get_scsi[id][7]));
+ printk(" %2d %2s %2s %2s %2s %2s %2s %2s %2s\n",
+ id, ti_l(get_ldn[id][0]), ti_l(get_ldn[id][1]),
+ ti_l(get_ldn[id][2]), ti_l(get_ldn[id][3]),
+ ti_l(get_ldn[id][4]), ti_l(get_ldn[id][5]),
+ ti_l(get_ldn[id][6]), ti_l(get_ldn[id][7]));
+ }
+#endif
+
+ /* assign total number of found SCSI-devices to the statistics struct */
+ IBM_DS.total_scsi_devices = count_devices;
+
+ /* decide for output in /proc-filesystem, if the configuration of
+ SCSI-devices makes dynamical reassignment of devices necessary */
+ if (count_devices>=MAX_LOG_DEV)
+ IBM_DS.dyn_flag = 1; /* dynamical assignment is necessary */
+ else
+ IBM_DS.dyn_flag = 0; /* dynamical assignment is not necessary */
+
+ /* If no SCSI-devices are assigned, return 1 in order to cause message. */
+ if (ldn == 0)
+ printk("IBM MCA SCSI: Warning: No SCSI-devices found/assignable!\n");
+
+ /* reset the counters for statistics on the current adapter */
+ IBM_DS.total_accesses = 0;
+ IBM_DS.total_interrupts = 0;
+ IBM_DS.dynamical_assignments = 0;
+ memset (IBM_DS.ldn_access, 0x0, sizeof (IBM_DS.ldn_access));
+ memset (IBM_DS.ldn_read_access, 0x0, sizeof (IBM_DS.ldn_read_access));
+ memset (IBM_DS.ldn_write_access, 0x0, sizeof (IBM_DS.ldn_write_access));
+ memset (IBM_DS.ldn_assignments, 0x0, sizeof (IBM_DS.ldn_assignments));
+
+ return;
+}
+
+/*--------------------------------------------------------------------*/
+
+static int
+device_exists (struct Scsi_Host *shpnt, int ldn, int *block_length,
+ int *device_type)
+{
+ struct im_scb scb;
+ struct im_tsb tsb;
+ unsigned char buf[256];
+ int retries;
+ /* if no valid device found, return immediately with 0 */
+ if (!(device_inquiry(shpnt, ldn, buf))) return 0;
+
/*if device is CD_ROM, assume block size 2048 and return */
if (buf[0] == TYPE_ROM)
{
- *is_disk = 0;
+ *device_type = TYPE_ROM;
+ *block_length = 2048; /* (standard blocksize for yellow-/red-book) */
+ return 1;
+ }
+
+ if (buf[0] == TYPE_WORM) /* CD-burner, WORM, Linux handles this as CD-ROM
+ therefore, the block_length is also 2048. */
+ {
+ *device_type = TYPE_WORM;
*block_length = 2048;
return 1;
}
-
- /*if device is disk, use "read capacity" to find its block size */
+
+ /* if device is disk, use "read capacity" to find its block size */
if (buf[0] == TYPE_DISK)
{
- *is_disk = 1;
+ *device_type = TYPE_DISK;
for (retries = 0; retries < 3; retries++)
{
return 0;
}
- /*for now, ignore tape and other devices - return 0 */
+ /* if this is a magneto-optical drive, treat it like a harddisk */
+ if (buf[0] == TYPE_MOD)
+ {
+ *device_type = TYPE_MOD;
+
+ for (retries = 0; retries < 3; retries++)
+ {
+ /*fill scb with read capacity command */
+ scb.command = IM_READ_CAPACITY_CMD;
+ scb.enable = IM_READ_CONTROL;
+ scb.sys_buf_adr = virt_to_bus(buf);
+ scb.sys_buf_length = 8;
+ scb.tsb_adr = virt_to_bus(&tsb);
+
+ /*issue scb to passed ldn, and busy wait for interrupt */
+ got_interrupt = 0;
+ issue_cmd (shpnt, virt_to_bus(&scb), IM_SCB | ldn);
+ while (!got_interrupt)
+ barrier ();
+
+ /*if got capacity, get block length and return one device found */
+ if (stat_result == IM_SCB_CMD_COMPLETED)
+ {
+ *block_length = buf[7] + (buf[6] << 8) + (buf[5] << 16) + (buf[4] << 24);
+ return 1;
+ }
+ }
+
+ /*if all three retries failed, return "no device at this ldn" */
+ if (retries >= 3)
+ return 0;
+ }
+
+ if (buf[0] == TYPE_TAPE) /* TAPE-device found */
+ {
+ *device_type = TYPE_TAPE;
+ *block_length = 0; /* not in use (setting by mt and mtst in op.) */
+ return 1;
+ }
+
+ if (buf[0] == TYPE_PROCESSOR) /* HP-Scanners, diverse SCSI-processing units*/
+ {
+ *device_type = TYPE_PROCESSOR;
+ *block_length = 0; /* they set their stuff on drivers */
+ return 1;
+ }
+
+ if (buf[0] == TYPE_SCANNER) /* other SCSI-scanners */
+ {
+ *device_type = TYPE_SCANNER;
+ *block_length = 0; /* they set their stuff on drivers */
+ return 1;
+ }
+
+ if (buf[0] == TYPE_MEDIUM_CHANGER) /* Medium-Changer */
+ {
+ *device_type = TYPE_MEDIUM_CHANGER;
+ *block_length = 0; /* One never knows, what to expect on a medium
+ changer device. */
+ return 1;
+ }
+
+ /* Up to now, no SCSI-devices that are known up to kernel 2.1.31 are
+ ignored! MO-drives are now supported and treated as harddisk. */
return 0;
}
void
ibmmca_scsi_setup (char *str, int *ints)
{
- int i;
+ int i;
- for (i = 0; i < IM_MAX_HOSTS && i < ints[0]; i++)
- {
+ for (i = 0; i < IM_MAX_HOSTS && i < ints[0]; i++)
io_port[i] = ints[i+1];
- }
}
#endif
/*--------------------------------------------------------------------*/
-int
+int
ibmmca_detect (Scsi_Host_Template * template)
{
struct Scsi_Host *shpnt;
/* if ibmmcascsi setup option was passed to kernel, return "found" */
for (i = 0; i < IM_MAX_HOSTS; i++)
if (io_port[i] > 0 && scsi_id[i] >= 0 && scsi_id[i] < 8)
- {
+ {
printk("IBM MCA SCSI: forced detection, io=0x%x, scsi id=%d.\n",
- io_port[i], scsi_id[i]);
+ io_port[i], scsi_id[i]);
ibmmca_register(template, io_port[i], scsi_id[i]);
- }
+ }
if (found) return found;
/* first look for the SCSI integrated on the motherboard */
port = IM_IO_PORT + ((pos2 & 0x0e) << 2);
id = (pos3 & 0xe0) >> 5;
printk("IBM MCA SCSI: integrated SCSI found, io=0x%x, scsi id=%d.\n",
- port, id);
+ port, id);
if ((shpnt = ibmmca_register(template, port, id)))
- {
- mca_set_adapter_name(MCA_INTEGSCSI, "PS/2 Integrated SCSI");
- mca_set_adapter_procfn(MCA_INTEGSCSI, (MCA_ProcFn) ibmmca_getinfo,
- shpnt);
- }
+ {
+ mca_set_adapter_name(MCA_INTEGSCSI, "PS/2 Integrated SCSI");
+ mca_set_adapter_procfn(MCA_INTEGSCSI, (MCA_ProcFn) ibmmca_getinfo,
+ shpnt);
+ }
}
/* now look for other adapters */
{
slot = 0;
while ((slot = mca_find_adapter(subsys_list[i].mca_id, slot))
- != MCA_NOTFOUND)
- {
- pos2 = mca_read_stored_pos(slot, 2);
- pos3 = mca_read_stored_pos(slot, 3);
- port = IM_IO_PORT + ((pos2 & 0x0e) << 2);
- id = (pos3 & 0xe0) >> 5;
- printk ("IBM MCA SCSI: %s found in slot %d, io=0x%x, scsi id=%d.\n",
- subsys_list[i].description, slot + 1, port, id);
- if ((shpnt = ibmmca_register(template, port, id)))
- {
- mca_set_adapter_name (slot, subsys_list[i].description);
- mca_set_adapter_procfn (slot, (MCA_ProcFn) ibmmca_getinfo,
- shpnt);
- }
- slot++;
- }
+ != MCA_NOTFOUND)
+ {
+ pos2 = mca_read_stored_pos(slot, 2);
+ pos3 = mca_read_stored_pos(slot, 3);
+ port = IM_IO_PORT + ((pos2 & 0x0e) << 2);
+ id = (pos3 & 0xe0) >> 5;
+ printk ("IBM MCA SCSI: %s found in slot %d, io=0x%x, scsi id=%d.\n",
+ subsys_list[i].description, slot + 1, port, id);
+ if ((shpnt = ibmmca_register(template, port, id)))
+ {
+ mca_set_adapter_name (slot, subsys_list[i].description);
+ mca_set_adapter_procfn (slot, (MCA_ProcFn) ibmmca_getinfo,
+ shpnt);
+ }
+ slot++;
+ }
}
if (!found) {
return found;
}
-/*--------------------------------------------------------------------*/
-
static struct Scsi_Host *
ibmmca_register(Scsi_Host_Template * template, int port, int id)
{
if (check_region(port, IM_N_IO_PORT))
{
printk("IBM MCA SCSI: Unable to get I/O region 0x%x-0x%x.\n",
- port, port + IM_N_IO_PORT);
+ port, port + IM_N_IO_PORT);
return NULL;
}
shpnt->io_port = port;
shpnt->n_io_port = IM_N_IO_PORT;
shpnt->this_id = id;
+
+ reset_status = IM_RESET_NOT_IN_PROGRESS;
+
for (i = 0; i < 8; i++)
for (j = 0; j < 8; j++)
get_ldn[i][j] = MAX_LOG_DEV;
/*--------------------------------------------------------------------*/
-int
-ibmmca_release(struct Scsi_Host *shpnt)
-{
- release_region(shpnt->io_port, shpnt->n_io_port);
- if (!(--found))
- free_irq(shpnt->irq, hosts);
- return 0;
-}
-
-/*--------------------------------------------------------------------*/
-
int
ibmmca_command (Scsi_Cmnd * cmd)
{
/*--------------------------------------------------------------------*/
-int
-ibmmca_queuecommand (Scsi_Cmnd * cmd, void (*done) (Scsi_Cmnd *))
+int
+ibmmca_release(struct Scsi_Host *shpnt)
+{
+ release_region(shpnt->io_port, shpnt->n_io_port);
+ if (!(--found))
+ free_irq(shpnt->irq, hosts);
+ return 0;
+}
+
+/*--------------------------------------------------------------------*/
+
+/* The following routine is the SCSI command queue. The old edition is
+ now improved by dynamical reassignment of ldn numbers that are
+ currently not assigned. The mechanism works in a way, that first
+ the physical structure is checked. If at a certain pun,lun a device
+ should be present, the routine proceeds to the ldn check from
+ get_ldn. An answer of 0xff would show-up, that the aimed device is
+ currently not assigned any ldn. At this point, the dynamical
+ remapping algorithm is called. It works in a way, that it goes in
+ cyclic order through the ldns from 7 to 14. If a ldn is assigned,
+ it takes 8 dynamical reassignment calls, until a device looses its
+ ldn again. With this method it is assured, that while doing
+ intense I/O between up to eight devices, no dynamical remapping is
+ done there. ldns 0 through 6(!) are left untouched, which means, that
+ puns 0 through 7(!) on lun=0 are always accessible without remapping.
+ These ldns are statically assigned by this driver. The subsystem always
+ occupies at least one pun, therefore 7 ldns (at lun=0) for other devices
+ are sufficient. (The adapter uses always ldn=15, at whatever pun it is.) */
+int ibmmca_queuecommand (Scsi_Cmnd * cmd, void (*done) (Scsi_Cmnd *))
{
unsigned int ldn;
unsigned int scsi_cmd;
struct im_scb *scb;
struct Scsi_Host *shpnt = cmd->host;
-
- /*if (target,lun) unassigned, return error */
+
+ int current_ldn;
+ int id,lun;
+
+ /*if (target,lun) is NO LUN or not existing at all, return error */
+ if ((get_scsi[cmd->target][cmd->lun] == TYPE_NO_LUN)||
+ (get_scsi[cmd->target][cmd->lun] == TYPE_NO_DEVICE))
+ {
+ cmd->result = DID_NO_CONNECT << 16;
+ done (cmd);
+ return 0;
+ }
+
+ /*if (target,lun) unassigned, do further checks... */
ldn = get_ldn[cmd->target][cmd->lun];
- if (ldn >= MAX_LOG_DEV)
+ if (ldn >= MAX_LOG_DEV) /* on invalid ldn do special stuff */
{
- cmd->result = DID_NO_CONNECT << 16;
- done (cmd);
- return 0;
+ if (ldn > MAX_LOG_DEV) /* dynamical remapping if ldn unassigned */
+ {
+ current_ldn = next_ldn; /* stop-value for one circle */
+ while (ld[next_ldn].cmd) /* search for a occupied, but not in */
+ { /* command-processing ldn. */
+ next_ldn ++;
+ if (next_ldn>=MAX_LOG_DEV)
+ next_ldn = 7;
+ if (current_ldn == next_ldn) /* One circle done ? */
+ { /* no non-processing ldn found */
+ printk("IBM MCA SCSI: Cannot assign SCSI-device dynamically!\n");
+ printk(" On ldn 7-14 SCSI-commands everywhere in progress.\n");
+ printk(" Reporting DID_NO_CONNECT for device (%d,%d).\n",
+ cmd->target, cmd->lun);
+ cmd->result = DID_NO_CONNECT << 16;/* return no connect*/
+ done (cmd);
+ return 0;
+ }
+ }
+
+ /* unmap non-processing ldn */
+ for (id=0; id<=7; id ++)
+ for (lun=0; lun<=7; lun++)
+ {
+ if (get_ldn[id][lun] == next_ldn)
+ {
+ get_ldn[id][lun] = TYPE_NO_DEVICE; /* unmap entry */
+ goto DYN_ASSIGN; /* jump out as fast as possible */
+ }
+ }
+
+DYN_ASSIGN:
+ /* unassign found ldn (pun,lun does not matter for remove) */
+ immediate_assign(shpnt,0,0,next_ldn,REMOVE_LDN);
+ /* assign found ldn to aimed pun,lun */
+ immediate_assign(shpnt,cmd->target,cmd->lun,next_ldn,SET_LDN);
+ /* map found ldn to pun,lun */
+ get_ldn[cmd->target][cmd->lun] = next_ldn;
+ /* change ldn to the right value, that is now next_ldn */
+ ldn = next_ldn;
+ /* set reduced interrupt_handler-mode for checking */
+ local_checking_phase_flag = 1;
+ /* get device information for ld[ldn] */
+ if (device_exists (shpnt, ldn, &ld[ldn].block_length,
+ &ld[ldn].device_type))
+ {
+ ld[ldn].cmd = 0; /* To prevent panic set 0, because
+ devices that were not assigned,
+ should have nothing in progress. */
+
+ /* increase assignment counters for statistics in /proc */
+ IBM_DS.dynamical_assignments++;
+ IBM_DS.ldn_assignments[ldn]++;
+ }
+ else
+ /* panic here, because a device, found at boottime has
+ vanished */
+ panic("IBM MCA SCSI: ldn=0x%x, SCSI-device on (%d,%d) vanished!\n",
+ ldn, cmd->target, cmd->lun);
+
+ /* set back to normal interrupt_handling */
+ local_checking_phase_flag = 0;
+
+ /* Information on syslog terminal */
+ printk("IBM MCA SCSI: ldn=0x%x dynamically reassigned to (%d,%d).\n",
+ ldn, cmd->target, cmd->lun);
+
+ /* increase next_ldn for next dynamical assignment */
+ next_ldn ++;
+ if (next_ldn>=MAX_LOG_DEV) next_ldn = 7;
+ }
+ else
+ { /* wall against Linux accesses to the subsystem adapter */
+ cmd->result = DID_NO_CONNECT << 16;
+ done (cmd);
+ return 0;
+ }
}
/*verify there is no command already in progress for this log dev */
/*fill scb information dependent on scsi command */
scsi_cmd = cmd->cmnd[0];
+
#ifdef IM_DEBUG_CMD
printk("issue scsi cmd=%02x to ldn=%d\n", scsi_cmd, ldn);
#endif
+
+ /* for specific device debugging: */
+#ifdef IM_DEBUG_CMD_SPEC_DEV
+ if (ld[ldn].device_type==IM_DEBUG_CMD_DEVICE)
+ printk("(SCSI-device-type=0x%x) issue scsi cmd=%02x to ldn=%d\n",
+ ld[ldn].device_type, scsi_cmd, ldn);
+#endif
+
+ /* for possible panics store current command */
+ last_scsi_command = scsi_cmd;
+
+ /* update statistical info */
+ IBM_DS.total_accesses++;
+ IBM_DS.ldn_access[ldn]++;
+
switch (scsi_cmd)
{
case READ_6:
case WRITE_6:
case READ_10:
case WRITE_10:
- if (scsi_cmd == READ_6 || scsi_cmd == READ_10)
- {
- scb->command = IM_READ_DATA_CMD;
- scb->enable |= IM_READ_CONTROL;
- }
- else
- {
- scb->command = IM_WRITE_DATA_CMD;
- }
- if (scsi_cmd == READ_6 || scsi_cmd == WRITE_6)
- {
- scb->u1.log_blk_adr = (((unsigned) cmd->cmnd[3]) << 0) |
- (((unsigned) cmd->cmnd[2]) << 8) |
- ((((unsigned) cmd->cmnd[1]) & 0x1f) << 16);
- scb->u2.blk.count = (unsigned) cmd->cmnd[4];
- }
- else
- {
- scb->u1.log_blk_adr = (((unsigned) cmd->cmnd[5]) << 0) |
- (((unsigned) cmd->cmnd[4]) << 8) |
- (((unsigned) cmd->cmnd[3]) << 16) |
- (((unsigned) cmd->cmnd[2]) << 24);
- scb->u2.blk.count = (((unsigned) cmd->cmnd[8]) << 0) |
- (((unsigned) cmd->cmnd[7]) << 8);
- }
- scb->u2.blk.length = ld[ldn].block_length;
- if (ld[ldn].is_disk)
- {
- if (++disk_rw_in_progress == 1)
- PS2_DISK_LED_ON ();
- }
+ case READ_12:
+ case WRITE_12:
+ /* statistics for proc_info */
+ if ((scsi_cmd == READ_6)||(scsi_cmd == READ_10)||(scsi_cmd == READ_12))
+ IBM_DS.ldn_read_access[ldn]++; /* increase READ-access on ldn stat. */
+ else if ((scsi_cmd == WRITE_6)||(scsi_cmd == WRITE_10)||
+ (scsi_cmd == WRITE_12))
+ IBM_DS.ldn_write_access[ldn]++; /* increase write-count on ldn stat.*/
+
+ /* Distinguish between disk and other devices. Only disks (that are the
+ most frequently accessed devices) should be supported by the
+ IBM-SCSI-Subsystem commands. */
+ switch (ld[ldn].device_type)
+ {
+ case TYPE_DISK: /* for harddisks enter here ... */
+ case TYPE_MOD: /* ... try it also for MO-drives (send flames as */
+ /* you like, if this won't work.) */
+ if (scsi_cmd == READ_6 || scsi_cmd == READ_10 ||
+ scsi_cmd == READ_12)
+ {
+ scb->command = IM_READ_DATA_CMD;
+ scb->enable |= IM_READ_CONTROL;
+ }
+ else
+ {
+ scb->command = IM_WRITE_DATA_CMD;
+ }
+ if (scsi_cmd == READ_6 || scsi_cmd == WRITE_6)
+ {
+ scb->u1.log_blk_adr = (((unsigned) cmd->cmnd[3]) << 0) |
+ (((unsigned) cmd->cmnd[2]) << 8) |
+ ((((unsigned) cmd->cmnd[1]) & 0x1f) << 16);
+ scb->u2.blk.count = (unsigned) cmd->cmnd[4];
+ }
+ else
+ {
+ scb->u1.log_blk_adr = (((unsigned) cmd->cmnd[5]) << 0) |
+ (((unsigned) cmd->cmnd[4]) << 8) |
+ (((unsigned) cmd->cmnd[3]) << 16) |
+ (((unsigned) cmd->cmnd[2]) << 24);
+ scb->u2.blk.count = (((unsigned) cmd->cmnd[8]) << 0) |
+ (((unsigned) cmd->cmnd[7]) << 8);
+ }
+ scb->u2.blk.length = ld[ldn].block_length;
+ if (++disk_rw_in_progress == 1)
+ PS2_DISK_LED_ON (shpnt->host_no, cmd->target);
+ break;
+
+ /* for other devices, enter here. Other types are not known by
+ Linux! TYPE_NO_LUN is forbidden as valid device. */
+ case TYPE_ROM:
+ case TYPE_TAPE:
+ case TYPE_PROCESSOR:
+ case TYPE_WORM:
+ case TYPE_SCANNER:
+ case TYPE_MEDIUM_CHANGER:
+
+ /* If there is a sequential-device, IBM recommends to use
+ IM_OTHER_SCSI_CMD_CMD instead of subsystem READ/WRITE.
+ Good/modern CD-ROM-drives are capable of
+ reading sequential AND random-access. This leads to the problem,
+ that random-accesses are covered by the subsystem, but
+ sequentials are not, as like for tape-drives. Therefore, it is
+ the easiest way to use IM_OTHER_SCSI_CMD_CMD for all read-ops
+ on CD-ROM-drives in order not to run into timing problems and
+ to have a stable state. In addition, data-access on CD-ROMs
+ works faster like that. Strange, but obvious. */
+
+ scb->command = IM_OTHER_SCSI_CMD_CMD;
+ if (scsi_cmd == READ_6 || scsi_cmd == READ_10 ||
+ scsi_cmd == READ_12) /* enable READ */
+ scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT;
+ else
+ scb->enable |= IM_SUPRESS_EXCEPTION_SHORT; /* assume WRITE */
+
+ scb->u1.scsi_cmd_length = cmd->cmd_len;
+ memcpy (scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len);
+
+ /* Read/write on this non-disk devices is also displayworthy,
+ so flash-up the LED/display. */
+ if (++disk_rw_in_progress == 1)
+ PS2_DISK_LED_ON (shpnt->host_no, cmd->target);
+ break;
+ }
break;
-
case INQUIRY:
scb->command = IM_DEVICE_INQUIRY_CMD;
- scb->enable |= IM_READ_CONTROL |
- IM_SUPRESS_EXCEPTION_SHORT;
+ scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT;
break;
case READ_CAPACITY:
scb->command = IM_READ_CAPACITY_CMD;
scb->enable |= IM_READ_CONTROL;
- /*the length of system memory buffer must be exactly 8 bytes */
+ /* the length of system memory buffer must be exactly 8 bytes */
if (scb->sys_buf_length >= 8)
scb->sys_buf_length = 8;
break;
+ /* Commands that need read-only-mode (system <- device): */
case REQUEST_SENSE:
scb->command = IM_REQUEST_SENSE_CMD;
scb->enable |= IM_READ_CONTROL;
break;
-
+
+ /* Commands that need write-only-mode (system -> device): */
+ case MODE_SELECT:
+ case MODE_SELECT_10:
+ scb->command = IM_OTHER_SCSI_CMD_CMD;
+ scb->enable |= IM_SUPRESS_EXCEPTION_SHORT; /*Select needs WRITE-enabled*/
+ scb->u1.scsi_cmd_length = cmd->cmd_len;
+ memcpy (scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len);
+ break;
+
+ /* For other commands, read-only is useful. Most other commands are
+ running without an input-data-block. */
default:
scb->command = IM_OTHER_SCSI_CMD_CMD;
- scb->enable |= IM_READ_CONTROL |
- IM_SUPRESS_EXCEPTION_SHORT;
+ scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT;
scb->u1.scsi_cmd_length = cmd->cmd_len;
memcpy (scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len);
break;
/* The code below doesn't work right now, so we tell the upper layer
that we can't abort. This eventually causes a reset.
*/
- return SCSI_ABORT_SNOOZE;
+ return SCSI_ABORT_SNOOZE ;
#if 0
- struct Scsi_Host *shpnt = cmd->host;
+ struct Scsi_host *shpnt = cmd->host;
unsigned int ldn;
void (*saved_done) (Scsi_Cmnd *);
saved_done = cmd->scsi_done;
cmd->scsi_done = internal_done;
cmd->SCp.Status = 0;
- issue_cmd (shpnt, IM_ABORT_IMM_CMD, IM_IMM_CMD | ldn);
+ issue_cmd (shpnt, T_IMM_CMD, IM_IMM_CMD | ldn);
while (!cmd->SCp.Status)
barrier ();
/*--------------------------------------------------------------------*/
-int
+int
ibmmca_reset (Scsi_Cmnd * cmd, unsigned int reset_flags)
{
struct Scsi_Host *shpnt = cmd->host;
udelay(1000000/HZ);
barrier();
}
-
/* if reset did not complete, just return an error*/
if (!ticks) {
printk("IBM MCA SCSI: reset did not complete within %d seconds.\n",
- IM_RESET_DELAY);
+ IM_RESET_DELAY);
reset_status = IM_RESET_FINISHED_FAIL;
return SCSI_RESET_ERROR;
}
-
+
/* if reset failed, just return an error */
if (reset_status == IM_RESET_FINISHED_FAIL) {
printk("IBM MCA SCSI: reset failed.\n");
int i;
for (i = 0; i < MAX_LOG_DEV; i++)
{
- Scsi_Cmnd *cmd = ld[i].cmd;
- if (cmd && cmd->scsi_done)
- {
- ld[i].cmd = 0;
- cmd->result = DID_RESET;
- (cmd->scsi_done) (cmd);
- }
+ Scsi_Cmnd *cmd = ld[i].cmd;
+ if (cmd && cmd->scsi_done)
+ {
+ ld[i].cmd = 0;
+ cmd->result = DID_RESET;
+ (cmd->scsi_done) (cmd);
+ }
}
}
return SCSI_RESET_SUCCESS;
return 0;
}
-/*--------------------------------------------------------------------*/
+/* calculate percentage of total accesses on a ldn */
+static int ldn_access_load(struct Scsi_Host *shpnt, int ldn)
+{
+ if (IBM_DS.total_accesses == 0) return (0);
+ if (IBM_DS.ldn_access[ldn] == 0) return (0);
+ return((int)(((float)IBM_DS.ldn_access[ldn]/(float)IBM_DS.total_accesses)*(float)100.000));
+}
+
+/* calculate total amount of r/w-accesses */
+static int ldn_access_total_read_write(struct Scsi_Host *shpnt)
+{
+ int a = 0;
+ int i;
+
+ for (i=0; i<=MAX_LOG_DEV; i++)
+ a+=IBM_DS.ldn_read_access[i]+IBM_DS.ldn_write_access[i];
+ return(a);
+}
+
+/* routine to display info in the proc-fs-structure (a deluxe feature) */
+int ibmmca_proc_info (char *buffer, char **start, off_t offset, int length,
+ int hostno, int inout)
+{
+ int len=0;
+ int i,id;
+ struct Scsi_Host *shpnt;
+
+ for (i = 0; hosts[i] && hosts[i]->host_no != hostno; i++);
+ shpnt = hosts[i];
+ if (!shpnt) {
+ len += sprintf(buffer+len, "\nCan't find adapter for host number %d\n", hostno);
+ return len;
+ }
+
+ cli();
+
+ len += sprintf(buffer+len, "\n IBM-SCSI-Subsystem-Linux-Driver, Version %s\n\n\n",
+ IBMMCA_SCSI_DRIVER_VERSION);
+ len += sprintf(buffer+len, " SCSI Access-Statistics:\n");
+#ifdef CONFIG_SCSI_MULTI_LUN
+ len += sprintf(buffer+len, " Multiple LUN probing.....: Yes\n");
+#else
+ len += sprintf(buffer+len, " Multiple LUN probing.....: No\n");
+#endif
+ len += sprintf(buffer+len, " This Hostnumber..........: %d\n",
+ hostno);
+ len += sprintf(buffer+len, " Base I/O-Port............: 0x%x\n",
+ IM_CMD_REG);
+ len += sprintf(buffer+len, " (Shared) IRQ.............: %d\n",
+ IM_IRQ);
+ len += sprintf(buffer+len, " Total Interrupts.........: %d\n",
+ IBM_DS.total_interrupts);
+ len += sprintf(buffer+len, " Total SCSI Accesses......: %d\n",
+ IBM_DS.total_accesses);
+ len += sprintf(buffer+len, " Total SCSI READ/WRITE..: %d\n",
+ ldn_access_total_read_write(shpnt));
+ len += sprintf(buffer+len, " Total SCSI other cmds..: %d\n\n",
+ IBM_DS.total_accesses - ldn_access_total_read_write(shpnt));
+
+ len += sprintf(buffer+len, " Logical-Device-Number (LDN) Access-Statistics:\n");
+ len += sprintf(buffer+len, " LDN | Accesses [%%] | READ | WRITE | ASSIGNMENTS\n");
+ len += sprintf(buffer+len, " -----|--------------|-----------|-----------|--------------\n");
+ for (i=0; i<=MAX_LOG_DEV; i++)
+ len += sprintf(buffer+len, " %2X | %3d | %8d | %8d | %8d\n",
+ i, ldn_access_load(shpnt, i), IBM_DS.ldn_read_access[i],
+ IBM_DS.ldn_write_access[i], IBM_DS.ldn_assignments[i]);
+ len += sprintf(buffer+len, " -----------------------------------------------------------\n\n");
+
+ len += sprintf(buffer+len, " Dynamical-LDN-Assignment-Statistics:\n");
+ len += sprintf(buffer+len, " Number of physical SCSI-devices..: %d (+ Adapter)\n",
+ IBM_DS.total_scsi_devices);
+ len += sprintf(buffer+len, " Dynamical Assignment necessaray..: %s\n",
+ IBM_DS.dyn_flag ? "Yes" : "No ");
+ len += sprintf(buffer+len, " Next LDN to be assigned..........: 0x%x\n",
+ next_ldn);
+ len += sprintf(buffer+len, " Dynamical assignments done yet...: %d\n",
+ IBM_DS.dynamical_assignments);
+
+ len += sprintf(buffer+len, "\n Current SCSI-Device-Mapping:\n");
+ len += sprintf(buffer+len, " Physical SCSI-Device Map Logical SCSI-Device Map\n");
+ len += sprintf(buffer+len, " ID\\LUN 0 1 2 3 4 5 6 7 ID\\LUN 0 1 2 3 4 5 6 7\n");
+ for (id=0; id<=7; id++)
+ {
+ len += sprintf(buffer+len, " %2d %2s %2s %2s %2s %2s %2s %2s %2s",
+ id, ti_p(get_scsi[id][0]), ti_p(get_scsi[id][1]),
+ ti_p(get_scsi[id][2]), ti_p(get_scsi[id][3]),
+ ti_p(get_scsi[id][4]), ti_p(get_scsi[id][5]),
+ ti_p(get_scsi[id][6]), ti_p(get_scsi[id][7]));
+ len += sprintf(buffer+len, " %2d %2s %2s %2s %2s %2s %2s %2s %2s\n",
+ id, ti_l(get_ldn[id][0]), ti_l(get_ldn[id][1]),
+ ti_l(get_ldn[id][2]), ti_l(get_ldn[id][3]),
+ ti_l(get_ldn[id][4]), ti_l(get_ldn[id][5]),
+ ti_l(get_ldn[id][6]), ti_l(get_ldn[id][7]));
+ }
+
+ len += sprintf(buffer+len, "(A = IBM-Subsystem, D = Harddisk, T = Tapedrive, P = Processor, W = WORM,\n");
+ len += sprintf(buffer+len, " R = CD-ROM, S = Scanner, M = MO-Drive, C = Medium-Changer, + = unprovided LUN,\n");
+ len += sprintf(buffer+len, " - = nothing found)\n\n");
+
+ *start = buffer + offset;
+ len -= offset;
+ if (len > length)
+ len = length;
+
+ sti();
+
+ return len;
+}
#ifdef MODULE
/* Eventually this will go into an include file, but this will be later */
#include "scsi_module.c"
#endif
+/*--------------------------------------------------------------------*/
projects / history.git / commitdiff