/*
- * linux/drivers/ide/ide-tape.c Version 1.19 Nov, 2003
- *
- * Copyright (C) 1995 - 1999 Gadi Oxman <gadio@netvision.net.il>
+ * IDE ATAPI streaming tape driver.
*
- * $Header$
+ * Copyright (C) 1995-1999 Gadi Oxman <gadio@netvision.net.il>
+ * Copyright (C) 2003-2005 Bartlomiej Zolnierkiewicz
*
* This driver was constructed as a student project in the software laboratory
* of the faculty of electrical engineering in the Technion - Israel's
*
* It is hereby placed under the terms of the GNU general public license.
* (See linux/COPYING).
- */
-
-/*
- * IDE ATAPI streaming tape driver.
- *
- * This driver is a part of the Linux ide driver and works in co-operation
- * with linux/drivers/block/ide.c.
- *
- * The driver, in co-operation with ide.c, basically traverses the
- * request-list for the block device interface. The character device
- * interface, on the other hand, creates new requests, adds them
- * to the request-list of the block device, and waits for their completion.
- *
- * Pipelined operation mode is now supported on both reads and writes.
- *
- * The block device major and minor numbers are determined from the
- * tape's relative position in the ide interfaces, as explained in ide.c.
- *
- * The character device interface consists of the following devices:
- *
- * ht0 major 37, minor 0 first IDE tape, rewind on close.
- * ht1 major 37, minor 1 second IDE tape, rewind on close.
- * ...
- * nht0 major 37, minor 128 first IDE tape, no rewind on close.
- * nht1 major 37, minor 129 second IDE tape, no rewind on close.
- * ...
- *
- * Run linux/scripts/MAKEDEV.ide to create the above entries.
- *
- * The general magnetic tape commands compatible interface, as defined by
- * include/linux/mtio.h, is accessible through the character device.
- *
- * General ide driver configuration options, such as the interrupt-unmask
- * flag, can be configured by issuing an ioctl to the block device interface,
- * as any other ide device.
- *
- * Our own ide-tape ioctl's can be issued to either the block device or
- * the character device interface.
- *
- * Maximal throughput with minimal bus load will usually be achieved in the
- * following scenario:
- *
- * 1. ide-tape is operating in the pipelined operation mode.
- * 2. No buffering is performed by the user backup program.
- *
- * Testing was done with a 2 GB CONNER CTMA 4000 IDE ATAPI Streaming Tape Drive.
- *
- * Ver 0.1 Nov 1 95 Pre-working code :-)
- * Ver 0.2 Nov 23 95 A short backup (few megabytes) and restore procedure
- * was successful ! (Using tar cvf ... on the block
- * device interface).
- * A longer backup resulted in major swapping, bad
- * overall Linux performance and eventually failed as
- * we received non serial read-ahead requests from the
- * buffer cache.
- * Ver 0.3 Nov 28 95 Long backups are now possible, thanks to the
- * character device interface. Linux's responsiveness
- * and performance doesn't seem to be much affected
- * from the background backup procedure.
- * Some general mtio.h magnetic tape operations are
- * now supported by our character device. As a result,
- * popular tape utilities are starting to work with
- * ide tapes :-)
- * The following configurations were tested:
- * 1. An IDE ATAPI TAPE shares the same interface
- * and irq with an IDE ATAPI CDROM.
- * 2. An IDE ATAPI TAPE shares the same interface
- * and irq with a normal IDE disk.
- * Both configurations seemed to work just fine !
- * However, to be on the safe side, it is meanwhile
- * recommended to give the IDE TAPE its own interface
- * and irq.
- * The one thing which needs to be done here is to
- * add a "request postpone" feature to ide.c,
- * so that we won't have to wait for the tape to finish
- * performing a long media access (DSC) request (such
- * as a rewind) before we can access the other device
- * on the same interface. This effect doesn't disturb
- * normal operation most of the time because read/write
- * requests are relatively fast, and once we are
- * performing one tape r/w request, a lot of requests
- * from the other device can be queued and ide.c will
- * service all of them after this single tape request.
- * Ver 1.0 Dec 11 95 Integrated into Linux 1.3.46 development tree.
- * On each read / write request, we now ask the drive
- * if we can transfer a constant number of bytes
- * (a parameter of the drive) only to its buffers,
- * without causing actual media access. If we can't,
- * we just wait until we can by polling the DSC bit.
- * This ensures that while we are not transferring
- * more bytes than the constant referred to above, the
- * interrupt latency will not become too high and
- * we won't cause an interrupt timeout, as happened
- * occasionally in the previous version.
- * While polling for DSC, the current request is
- * postponed and ide.c is free to handle requests from
- * the other device. This is handled transparently to
- * ide.c. The hwgroup locking method which was used
- * in the previous version was removed.
- * Use of new general features which are provided by
- * ide.c for use with atapi devices.
- * (Programming done by Mark Lord)
- * Few potential bug fixes (Again, suggested by Mark)
- * Single character device data transfers are now
- * not limited in size, as they were before.
- * We are asking the tape about its recommended
- * transfer unit and send a larger data transfer
- * as several transfers of the above size.
- * For best results, use an integral number of this
- * basic unit (which is shown during driver
- * initialization). I will soon add an ioctl to get
- * this important parameter.
- * Our data transfer buffer is allocated on startup,
- * rather than before each data transfer. This should
- * ensure that we will indeed have a data buffer.
- * Ver 1.1 Dec 14 95 Fixed random problems which occurred when the tape
- * shared an interface with another device.
- * (poll_for_dsc was a complete mess).
- * Removed some old (non-active) code which had
- * to do with supporting buffer cache originated
- * requests.
- * The block device interface can now be opened, so
- * that general ide driver features like the unmask
- * interrupts flag can be selected with an ioctl.
- * This is the only use of the block device interface.
- * New fast pipelined operation mode (currently only on
- * writes). When using the pipelined mode, the
- * throughput can potentially reach the maximum
- * tape supported throughput, regardless of the
- * user backup program. On my tape drive, it sometimes
- * boosted performance by a factor of 2. Pipelined
- * mode is enabled by default, but since it has a few
- * downfalls as well, you may want to disable it.
- * A short explanation of the pipelined operation mode
- * is available below.
- * Ver 1.2 Jan 1 96 Eliminated pipelined mode race condition.
- * Added pipeline read mode. As a result, restores
- * are now as fast as backups.
- * Optimized shared interface behavior. The new behavior
- * typically results in better IDE bus efficiency and
- * higher tape throughput.
- * Pre-calculation of the expected read/write request
- * service time, based on the tape's parameters. In
- * the pipelined operation mode, this allows us to
- * adjust our polling frequency to a much lower value,
- * and thus to dramatically reduce our load on Linux,
- * without any decrease in performance.
- * Implemented additional mtio.h operations.
- * The recommended user block size is returned by
- * the MTIOCGET ioctl.
- * Additional minor changes.
- * Ver 1.3 Feb 9 96 Fixed pipelined read mode bug which prevented the
- * use of some block sizes during a restore procedure.
- * The character device interface will now present a
- * continuous view of the media - any mix of block sizes
- * during a backup/restore procedure is supported. The
- * driver will buffer the requests internally and
- * convert them to the tape's recommended transfer
- * unit, making performance almost independent of the
- * chosen user block size.
- * Some improvements in error recovery.
- * By cooperating with ide-dma.c, bus mastering DMA can
- * now sometimes be used with IDE tape drives as well.
- * Bus mastering DMA has the potential to dramatically
- * reduce the CPU's overhead when accessing the device,
- * and can be enabled by using hdparm -d1 on the tape's
- * block device interface. For more info, read the
- * comments in ide-dma.c.
- * Ver 1.4 Mar 13 96 Fixed serialize support.
- * Ver 1.5 Apr 12 96 Fixed shared interface operation, broken in 1.3.85.
- * Fixed pipelined read mode inefficiency.
- * Fixed nasty null dereferencing bug.
- * Ver 1.6 Aug 16 96 Fixed FPU usage in the driver.
- * Fixed end of media bug.
- * Ver 1.7 Sep 10 96 Minor changes for the CONNER CTT8000-A model.
- * Ver 1.8 Sep 26 96 Attempt to find a better balance between good
- * interactive response and high system throughput.
- * Ver 1.9 Nov 5 96 Automatically cross encountered filemarks rather
- * than requiring an explicit FSF command.
- * Abort pending requests at end of media.
- * MTTELL was sometimes returning incorrect results.
- * Return the real block size in the MTIOCGET ioctl.
- * Some error recovery bug fixes.
- * Ver 1.10 Nov 5 96 Major reorganization.
- * Reduced CPU overhead a bit by eliminating internal
- * bounce buffers.
- * Added module support.
- * Added multiple tape drives support.
- * Added partition support.
- * Rewrote DSC handling.
- * Some portability fixes.
- * Removed ide-tape.h.
- * Additional minor changes.
- * Ver 1.11 Dec 2 96 Bug fix in previous DSC timeout handling.
- * Use ide_stall_queue() for DSC overlap.
- * Use the maximum speed rather than the current speed
- * to compute the request service time.
- * Ver 1.12 Dec 7 97 Fix random memory overwriting and/or last block data
- * corruption, which could occur if the total number
- * of bytes written to the tape was not an integral
- * number of tape blocks.
- * Add support for INTERRUPT DRQ devices.
- * Ver 1.13 Jan 2 98 Add "speed == 0" work-around for HP COLORADO 5GB
- * Ver 1.14 Dec 30 98 Partial fixes for the Sony/AIWA tape drives.
- * Replace cli()/sti() with hwgroup spinlocks.
- * Ver 1.15 Mar 25 99 Fix SMP race condition by replacing hwgroup
- * spinlock with private per-tape spinlock.
- * Ver 1.16 Sep 1 99 Add OnStream tape support.
- * Abort read pipeline on EOD.
- * Wait for the tape to become ready in case it returns
- * "in the process of becoming ready" on open().
- * Fix zero padding of the last written block in
- * case the tape block size is larger than PAGE_SIZE.
- * Decrease the default disconnection time to tn.
- * Ver 1.16e Oct 3 99 Minor fixes.
- * Ver 1.16e1 Oct 13 99 Patches by Arnold Niessen,
- * niessen@iae.nl / arnold.niessen@philips.com
- * GO-1) Undefined code in idetape_read_position
- * according to Gadi's email
- * AJN-1) Minor fix asc == 11 should be asc == 0x11
- * in idetape_issue_packet_command (did effect
- * debugging output only)
- * AJN-2) Added more debugging output, and
- * added ide-tape: where missing. I would also
- * like to add tape->name where possible
- * AJN-3) Added different debug_level's
- * via /proc/ide/hdc/settings
- * "debug_level" determines amount of debugging output;
- * can be changed using /proc/ide/hdx/settings
- * 0 : almost no debugging output
- * 1 : 0+output errors only
- * 2 : 1+output all sensekey/asc
- * 3 : 2+follow all chrdev related procedures
- * 4 : 3+follow all procedures
- * 5 : 4+include pc_stack rq_stack info
- * 6 : 5+USE_COUNT updates
- * AJN-4) Fixed timeout for retension in idetape_queue_pc_tail
- * from 5 to 10 minutes
- * AJN-5) Changed maximum number of blocks to skip when
- * reading tapes with multiple consecutive write
- * errors from 100 to 1000 in idetape_get_logical_blk
- * Proposed changes to code:
- * 1) output "logical_blk_num" via /proc
- * 2) output "current_operation" via /proc
- * 3) Either solve or document the fact that `mt rewind' is
- * required after reading from /dev/nhtx to be
- * able to rmmod the idetape module;
- * Also, sometimes an application finishes but the
- * device remains `busy' for some time. Same cause ?
- * Proposed changes to release-notes:
- * 4) write a simple `quickstart' section in the
- * release notes; I volunteer if you don't want to
- * 5) include a pointer to video4linux in the doc
- * to stimulate video applications
- * 6) release notes lines 331 and 362: explain what happens
- * if the application data rate is higher than 1100 KB/s;
- * similar approach to lower-than-500 kB/s ?
- * 7) 6.6 Comparison; wouldn't it be better to allow different
- * strategies for read and write ?
- * Wouldn't it be better to control the tape buffer
- * contents instead of the bandwidth ?
- * 8) line 536: replace will by would (if I understand
- * this section correctly, a hypothetical and unwanted situation
- * is being described)
- * Ver 1.16f Dec 15 99 Change place of the secondary OnStream header frames.
- * Ver 1.17 Nov 2000 / Jan 2001 Marcel Mol, marcel@mesa.nl
- * - Add idetape_onstream_mode_sense_tape_parameter_page
- * function to get tape capacity in frames: tape->capacity.
- * - Add support for DI-50 drives( or any DI- drive).
- * - 'workaround' for read error/blank block around block 3000.
- * - Implement Early warning for end of media for Onstream.
- * - Cosmetic code changes for readability.
- * - Idetape_position_tape should not use SKIP bit during
- * Onstream read recovery.
- * - Add capacity, logical_blk_num and first/last_frame_position
- * to /proc/ide/hd?/settings.
- * - Module use count was gone in the Linux 2.4 driver.
- * Ver 1.17a Apr 2001 Willem Riede osst@riede.org
- * - Get drive's actual block size from mode sense block descriptor
- * - Limit size of pipeline
- * Ver 1.17b Oct 2002 Alan Stern <stern@rowland.harvard.edu>
- * Changed IDETAPE_MIN_PIPELINE_STAGES to 1 and actually used
- * it in the code!
- * Actually removed aborted stages in idetape_abort_pipeline
- * instead of just changing the command code.
- * Made the transfer byte count for Request Sense equal to the
- * actual length of the data transfer.
- * Changed handling of partial data transfers: they do not
- * cause DMA errors.
- * Moved initiation of DMA transfers to the correct place.
- * Removed reference to unallocated memory.
- * Made __idetape_discard_read_pipeline return the number of
- * sectors skipped, not the number of stages.
- * Replaced errant kfree() calls with __idetape_kfree_stage().
- * Fixed off-by-one error in testing the pipeline length.
- * Fixed handling of filemarks in the read pipeline.
- * Small code optimization for MTBSF and MTBSFM ioctls.
- * Don't try to unlock the door during device close if is
- * already unlocked!
- * Cosmetic fixes to miscellaneous debugging output messages.
- * Set the minimum /proc/ide/hd?/settings values for "pipeline",
- * "pipeline_min", and "pipeline_max" to 1.
- *
- * Here are some words from the first releases of hd.c, which are quoted
- * in ide.c and apply here as well:
- *
- * | Special care is recommended. Have Fun!
- *
- */
-
-/*
- * An overview of the pipelined operation mode.
- *
- * In the pipelined write mode, we will usually just add requests to our
- * pipeline and return immediately, before we even start to service them. The
- * user program will then have enough time to prepare the next request while
- * we are still busy servicing previous requests. In the pipelined read mode,
- * the situation is similar - we add read-ahead requests into the pipeline,
- * before the user even requested them.
- *
- * The pipeline can be viewed as a "safety net" which will be activated when
- * the system load is high and prevents the user backup program from keeping up
- * with the current tape speed. At this point, the pipeline will get
- * shorter and shorter but the tape will still be streaming at the same speed.
- * Assuming we have enough pipeline stages, the system load will hopefully
- * decrease before the pipeline is completely empty, and the backup program
- * will be able to "catch up" and refill the pipeline again.
- *
- * When using the pipelined mode, it would be best to disable any type of
- * buffering done by the user program, as ide-tape already provides all the
- * benefits in the kernel, where it can be done in a more efficient way.
- * As we will usually not block the user program on a request, the most
- * efficient user code will then be a simple read-write-read-... cycle.
- * Any additional logic will usually just slow down the backup process.
*
- * Using the pipelined mode, I get a constant over 400 KBps throughput,
- * which seems to be the maximum throughput supported by my tape.
- *
- * However, there are some downfalls:
- *
- * 1. We use memory (for data buffers) in proportional to the number
- * of pipeline stages (each stage is about 26 KB with my tape).
- * 2. In the pipelined write mode, we cheat and postpone error codes
- * to the user task. In read mode, the actual tape position
- * will be a bit further than the last requested block.
- *
- * Concerning (1):
- *
- * 1. We allocate stages dynamically only when we need them. When
- * we don't need them, we don't consume additional memory. In
- * case we can't allocate stages, we just manage without them
- * (at the expense of decreased throughput) so when Linux is
- * tight in memory, we will not pose additional difficulties.
- *
- * 2. The maximum number of stages (which is, in fact, the maximum
- * amount of memory) which we allocate is limited by the compile
- * time parameter IDETAPE_MAX_PIPELINE_STAGES.
- *
- * 3. The maximum number of stages is a controlled parameter - We
- * don't start from the user defined maximum number of stages
- * but from the lower IDETAPE_MIN_PIPELINE_STAGES (again, we
- * will not even allocate this amount of stages if the user
- * program can't handle the speed). We then implement a feedback
- * loop which checks if the pipeline is empty, and if it is, we
- * increase the maximum number of stages as necessary until we
- * reach the optimum value which just manages to keep the tape
- * busy with minimum allocated memory or until we reach
- * IDETAPE_MAX_PIPELINE_STAGES.
- *
- * Concerning (2):
- *
- * In pipelined write mode, ide-tape can not return accurate error codes
- * to the user program since we usually just add the request to the
- * pipeline without waiting for it to be serviced. In case an error
- * occurs, I will report it on the next user request.
- *
- * In the pipelined read mode, subsequent read requests or forward
- * filemark spacing will perform correctly, as we preserve all blocks
- * and filemarks which we encountered during our excess read-ahead.
- *
- * For accurate tape positioning and error reporting, disabling
- * pipelined mode might be the best option.
- *
- * You can enable/disable/tune the pipelined operation mode by adjusting
- * the compile time parameters below.
+ * For a historical changelog see
+ * Documentation/ide/ChangeLog.ide-tape.1995-2002
*/
-/*
- * Possible improvements.
- *
- * 1. Support for the ATAPI overlap protocol.
- *
- * In order to maximize bus throughput, we currently use the DSC
- * overlap method which enables ide.c to service requests from the
- * other device while the tape is busy executing a command. The
- * DSC overlap method involves polling the tape's status register
- * for the DSC bit, and servicing the other device while the tape
- * isn't ready.
- *
- * In the current QIC development standard (December 1995),
- * it is recommended that new tape drives will *in addition*
- * implement the ATAPI overlap protocol, which is used for the
- * same purpose - efficient use of the IDE bus, but is interrupt
- * driven and thus has much less CPU overhead.
- *
- * ATAPI overlap is likely to be supported in most new ATAPI
- * devices, including new ATAPI cdroms, and thus provides us
- * a method by which we can achieve higher throughput when
- * sharing a (fast) ATA-2 disk with any (slow) new ATAPI device.
- */
+#define DRV_NAME "ide-tape"
-#define IDETAPE_VERSION "1.19"
+#define IDETAPE_VERSION "1.20"
#include <linux/module.h>
#include <linux/types.h>
#include <linux/completion.h>
#include <linux/bitops.h>
#include <linux/mutex.h>
+#include <scsi/scsi.h>
#include <asm/byteorder.h>
-#include <asm/irq.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
+#include <linux/irq.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
#include <asm/unaligned.h>
-
-/*
- * partition
- */
-typedef struct os_partition_s {
- __u8 partition_num;
- __u8 par_desc_ver;
- __u16 wrt_pass_cntr;
- __u32 first_frame_addr;
- __u32 last_frame_addr;
- __u32 eod_frame_addr;
-} os_partition_t;
-
-/*
- * DAT entry
- */
-typedef struct os_dat_entry_s {
- __u32 blk_sz;
- __u16 blk_cnt;
- __u8 flags;
- __u8 reserved;
-} os_dat_entry_t;
-
-/*
- * DAT
- */
-#define OS_DAT_FLAGS_DATA (0xc)
-#define OS_DAT_FLAGS_MARK (0x1)
-
-typedef struct os_dat_s {
- __u8 dat_sz;
- __u8 reserved1;
- __u8 entry_cnt;
- __u8 reserved3;
- os_dat_entry_t dat_list[16];
-} os_dat_t;
-
#include <linux/mtio.h>
-/**************************** Tunable parameters *****************************/
-
-
-/*
- * Pipelined mode parameters.
- *
- * We try to use the minimum number of stages which is enough to
- * keep the tape constantly streaming. To accomplish that, we implement
- * a feedback loop around the maximum number of stages:
- *
- * We start from MIN maximum stages (we will not even use MIN stages
- * if we don't need them), increment it by RATE*(MAX-MIN)
- * whenever we sense that the pipeline is empty, until we reach
- * the optimum value or until we reach MAX.
- *
- * Setting the following parameter to 0 is illegal: the pipelined mode
- * cannot be disabled (calculate_speeds() divides by tape->max_stages.)
- */
-#define IDETAPE_MIN_PIPELINE_STAGES 1
-#define IDETAPE_MAX_PIPELINE_STAGES 400
-#define IDETAPE_INCREASE_STAGES_RATE 20
+enum {
+ /* output errors only */
+ DBG_ERR = (1 << 0),
+ /* output all sense key/asc */
+ DBG_SENSE = (1 << 1),
+ /* info regarding all chrdev-related procedures */
+ DBG_CHRDEV = (1 << 2),
+ /* all remaining procedures */
+ DBG_PROCS = (1 << 3),
+};
-/*
- * The following are used to debug the driver:
- *
- * Setting IDETAPE_DEBUG_INFO to 1 will report device capabilities.
- * Setting IDETAPE_DEBUG_LOG to 1 will log driver flow control.
- * Setting IDETAPE_DEBUG_BUGS to 1 will enable self-sanity checks in
- * some places.
- *
- * Setting them to 0 will restore normal operation mode:
- *
- * 1. Disable logging normal successful operations.
- * 2. Disable self-sanity checks.
- * 3. Errors will still be logged, of course.
- *
- * All the #if DEBUG code will be removed some day, when the driver
- * is verified to be stable enough. This will make it much more
- * esthetic.
- */
-#define IDETAPE_DEBUG_INFO 0
+/* define to see debug info */
#define IDETAPE_DEBUG_LOG 0
-#define IDETAPE_DEBUG_BUGS 1
+#if IDETAPE_DEBUG_LOG
+#define debug_log(lvl, fmt, args...) \
+{ \
+ if (tape->debug_mask & lvl) \
+ printk(KERN_INFO "ide-tape: " fmt, ## args); \
+}
+#else
+#define debug_log(lvl, fmt, args...) do {} while (0)
+#endif
+
+/**************************** Tunable parameters *****************************/
/*
- * After each failed packet command we issue a request sense command
- * and retry the packet command IDETAPE_MAX_PC_RETRIES times.
+ * After each failed packet command we issue a request sense command and retry
+ * the packet command IDETAPE_MAX_PC_RETRIES times.
*
- * Setting IDETAPE_MAX_PC_RETRIES to 0 will disable retries.
+ * Setting IDETAPE_MAX_PC_RETRIES to 0 will disable retries.
*/
#define IDETAPE_MAX_PC_RETRIES 3
/*
- * With each packet command, we allocate a buffer of
- * IDETAPE_PC_BUFFER_SIZE bytes. This is used for several packet
- * commands (Not for READ/WRITE commands).
- */
-#define IDETAPE_PC_BUFFER_SIZE 256
-
-/*
- * In various places in the driver, we need to allocate storage
- * for packet commands and requests, which will remain valid while
- * we leave the driver to wait for an interrupt or a timeout event.
+ * The following parameter is used to select the point in the internal tape fifo
+ * in which we will start to refill the buffer. Decreasing the following
+ * parameter will improve the system's latency and interactive response, while
+ * using a high value might improve system throughput.
*/
-#define IDETAPE_PC_STACK (10 + IDETAPE_MAX_PC_RETRIES)
+#define IDETAPE_FIFO_THRESHOLD 2
/*
- * Some drives (for example, Seagate STT3401A Travan) require a very long
- * timeout, because they don't return an interrupt or clear their busy bit
- * until after the command completes (even retension commands).
- */
-#define IDETAPE_WAIT_CMD (900*HZ)
-
-/*
- * The following parameter is used to select the point in the internal
- * tape fifo in which we will start to refill the buffer. Decreasing
- * the following parameter will improve the system's latency and
- * interactive response, while using a high value might improve sytem
- * throughput.
- */
-#define IDETAPE_FIFO_THRESHOLD 2
-
-/*
- * DSC polling parameters.
- *
- * Polling for DSC (a single bit in the status register) is a very
- * important function in ide-tape. There are two cases in which we
- * poll for DSC:
+ * DSC polling parameters.
*
- * 1. Before a read/write packet command, to ensure that we
- * can transfer data from/to the tape's data buffers, without
- * causing an actual media access. In case the tape is not
- * ready yet, we take out our request from the device
- * request queue, so that ide.c will service requests from
- * the other device on the same interface meanwhile.
+ * Polling for DSC (a single bit in the status register) is a very important
+ * function in ide-tape. There are two cases in which we poll for DSC:
*
- * 2. After the successful initialization of a "media access
- * packet command", which is a command which can take a long
- * time to complete (it can be several seconds or even an hour).
+ * 1. Before a read/write packet command, to ensure that we can transfer data
+ * from/to the tape's data buffers, without causing an actual media access.
+ * In case the tape is not ready yet, we take out our request from the device
+ * request queue, so that ide.c could service requests from the other device
+ * on the same interface in the meantime.
*
- * Again, we postpone our request in the middle to free the bus
- * for the other device. The polling frequency here should be
- * lower than the read/write frequency since those media access
- * commands are slow. We start from a "fast" frequency -
- * IDETAPE_DSC_MA_FAST (one second), and if we don't receive DSC
- * after IDETAPE_DSC_MA_THRESHOLD (5 minutes), we switch it to a
- * lower frequency - IDETAPE_DSC_MA_SLOW (1 minute).
+ * 2. After the successful initialization of a "media access packet command",
+ * which is a command that can take a long time to complete (the interval can
+ * range from several seconds to even an hour). Again, we postpone our request
+ * in the middle to free the bus for the other device. The polling frequency
+ * here should be lower than the read/write frequency since those media access
+ * commands are slow. We start from a "fast" frequency - IDETAPE_DSC_MA_FAST
+ * (1 second), and if we don't receive DSC after IDETAPE_DSC_MA_THRESHOLD
+ * (5 min), we switch it to a lower frequency - IDETAPE_DSC_MA_SLOW (1 min).
*
- * We also set a timeout for the timer, in case something goes wrong.
- * The timeout should be longer then the maximum execution time of a
- * tape operation.
- */
-
-/*
- * DSC timings.
+ * We also set a timeout for the timer, in case something goes wrong. The
+ * timeout should be longer then the maximum execution time of a tape operation.
*/
+
+/* DSC timings. */
#define IDETAPE_DSC_RW_MIN 5*HZ/100 /* 50 msec */
#define IDETAPE_DSC_RW_MAX 40*HZ/100 /* 400 msec */
#define IDETAPE_DSC_RW_TIMEOUT 2*60*HZ /* 2 minutes */
/*************************** End of tunable parameters ***********************/
-/*
- * Debugging/Performance analysis
- *
- * I/O trace support
- */
-#define USE_IOTRACE 0
-#if USE_IOTRACE
-#include <linux/io_trace.h>
-#define IO_IDETAPE_FIFO 500
-#endif
-
-/*
- * Read/Write error simulation
- */
-#define SIMULATE_ERRORS 0
-
-/*
- * For general magnetic tape device compatibility.
- */
-typedef enum {
- idetape_direction_none,
- idetape_direction_read,
- idetape_direction_write
-} idetape_chrdev_direction_t;
+/* tape directions */
+enum {
+ IDETAPE_DIR_NONE = (1 << 0),
+ IDETAPE_DIR_READ = (1 << 1),
+ IDETAPE_DIR_WRITE = (1 << 2),
+};
struct idetape_bh {
- unsigned short b_size;
+ u32 b_size;
atomic_t b_count;
struct idetape_bh *b_reqnext;
char *b_data;
};
-/*
- * Our view of a packet command.
- */
-typedef struct idetape_packet_command_s {
- u8 c[12]; /* Actual packet bytes */
- int retries; /* On each retry, we increment retries */
- int error; /* Error code */
- int request_transfer; /* Bytes to transfer */
- int actually_transferred; /* Bytes actually transferred */
- int buffer_size; /* Size of our data buffer */
- struct idetape_bh *bh;
- char *b_data;
- int b_count;
- u8 *buffer; /* Data buffer */
- u8 *current_position; /* Pointer into the above buffer */
- ide_startstop_t (*callback) (ide_drive_t *); /* Called when this packet command is completed */
- u8 pc_buffer[IDETAPE_PC_BUFFER_SIZE]; /* Temporary buffer */
- unsigned long flags; /* Status/Action bit flags: long for set_bit */
-} idetape_pc_t;
-
-/*
- * Packet command flag bits.
- */
-/* Set when an error is considered normal - We won't retry */
-#define PC_ABORT 0
-/* 1 When polling for DSC on a media access command */
-#define PC_WAIT_FOR_DSC 1
-/* 1 when we prefer to use DMA if possible */
-#define PC_DMA_RECOMMENDED 2
-/* 1 while DMA in progress */
-#define PC_DMA_IN_PROGRESS 3
-/* 1 when encountered problem during DMA */
-#define PC_DMA_ERROR 4
-/* Data direction */
-#define PC_WRITING 5
-
-/*
- * Capabilities and Mechanical Status Page
- */
-typedef struct {
- unsigned page_code :6; /* Page code - Should be 0x2a */
- __u8 reserved0_6 :1;
- __u8 ps :1; /* parameters saveable */
- __u8 page_length; /* Page Length - Should be 0x12 */
- __u8 reserved2, reserved3;
- unsigned ro :1; /* Read Only Mode */
- unsigned reserved4_1234 :4;
- unsigned sprev :1; /* Supports SPACE in the reverse direction */
- unsigned reserved4_67 :2;
- unsigned reserved5_012 :3;
- unsigned efmt :1; /* Supports ERASE command initiated formatting */
- unsigned reserved5_4 :1;
- unsigned qfa :1; /* Supports the QFA two partition formats */
- unsigned reserved5_67 :2;
- unsigned lock :1; /* Supports locking the volume */
- unsigned locked :1; /* The volume is locked */
- unsigned prevent :1; /* The device defaults in the prevent state after power up */
- unsigned eject :1; /* The device can eject the volume */
- __u8 disconnect :1; /* The device can break request > ctl */
- __u8 reserved6_5 :1;
- unsigned ecc :1; /* Supports error correction */
- unsigned cmprs :1; /* Supports data compression */
- unsigned reserved7_0 :1;
- unsigned blk512 :1; /* Supports 512 bytes block size */
- unsigned blk1024 :1; /* Supports 1024 bytes block size */
- unsigned reserved7_3_6 :4;
- unsigned blk32768 :1; /* slowb - the device restricts the byte count for PIO */
- /* transfers for slow buffer memory ??? */
- /* Also 32768 block size in some cases */
- __u16 max_speed; /* Maximum speed supported in KBps */
- __u8 reserved10, reserved11;
- __u16 ctl; /* Continuous Transfer Limit in blocks */
- __u16 speed; /* Current Speed, in KBps */
- __u16 buffer_size; /* Buffer Size, in 512 bytes */
- __u8 reserved18, reserved19;
-} idetape_capabilities_page_t;
+/* Tape door status */
+#define DOOR_UNLOCKED 0
+#define DOOR_LOCKED 1
+#define DOOR_EXPLICITLY_LOCKED 2
-/*
- * Block Size Page
- */
-typedef struct {
- unsigned page_code :6; /* Page code - Should be 0x30 */
- unsigned reserved1_6 :1;
- unsigned ps :1;
- __u8 page_length; /* Page Length - Should be 2 */
- __u8 reserved2;
- unsigned play32 :1;
- unsigned play32_5 :1;
- unsigned reserved2_23 :2;
- unsigned record32 :1;
- unsigned record32_5 :1;
- unsigned reserved2_6 :1;
- unsigned one :1;
-} idetape_block_size_page_t;
+/* Some defines for the SPACE command */
+#define IDETAPE_SPACE_OVER_FILEMARK 1
+#define IDETAPE_SPACE_TO_EOD 3
-/*
- * A pipeline stage.
- */
-typedef struct idetape_stage_s {
- struct request rq; /* The corresponding request */
- struct idetape_bh *bh; /* The data buffers */
- struct idetape_stage_s *next; /* Pointer to the next stage */
-} idetape_stage_t;
+/* Some defines for the LOAD UNLOAD command */
+#define IDETAPE_LU_LOAD_MASK 1
+#define IDETAPE_LU_RETENSION_MASK 2
+#define IDETAPE_LU_EOT_MASK 4
-/*
- * REQUEST SENSE packet command result - Data Format.
- */
-typedef struct {
- unsigned error_code :7; /* Current of deferred errors */
- unsigned valid :1; /* The information field conforms to QIC-157C */
- __u8 reserved1 :8; /* Segment Number - Reserved */
- unsigned sense_key :4; /* Sense Key */
- unsigned reserved2_4 :1; /* Reserved */
- unsigned ili :1; /* Incorrect Length Indicator */
- unsigned eom :1; /* End Of Medium */
- unsigned filemark :1; /* Filemark */
- __u32 information __attribute__ ((packed));
- __u8 asl; /* Additional sense length (n-7) */
- __u32 command_specific; /* Additional command specific information */
- __u8 asc; /* Additional Sense Code */
- __u8 ascq; /* Additional Sense Code Qualifier */
- __u8 replaceable_unit_code; /* Field Replaceable Unit Code */
- unsigned sk_specific1 :7; /* Sense Key Specific */
- unsigned sksv :1; /* Sense Key Specific information is valid */
- __u8 sk_specific2; /* Sense Key Specific */
- __u8 sk_specific3; /* Sense Key Specific */
- __u8 pad[2]; /* Padding to 20 bytes */
-} idetape_request_sense_result_t;
+/* Error codes returned in rq->errors to the higher part of the driver. */
+#define IDETAPE_ERROR_GENERAL 101
+#define IDETAPE_ERROR_FILEMARK 102
+#define IDETAPE_ERROR_EOD 103
+/* Structures related to the SELECT SENSE / MODE SENSE packet commands. */
+#define IDETAPE_BLOCK_DESCRIPTOR 0
+#define IDETAPE_CAPABILITIES_PAGE 0x2a
/*
- * Most of our global data which we need to save even as we leave the
- * driver due to an interrupt or a timer event is stored in a variable
- * of type idetape_tape_t, defined below.
+ * Most of our global data which we need to save even as we leave the driver due
+ * to an interrupt or a timer event is stored in the struct defined below.
*/
typedef struct ide_tape_obj {
- ide_drive_t *drive;
- ide_driver_t *driver;
- struct gendisk *disk;
- struct kref kref;
+ ide_drive_t *drive;
+ struct ide_driver *driver;
+ struct gendisk *disk;
+ struct device dev;
/*
- * Since a typical character device operation requires more
- * than one packet command, we provide here enough memory
- * for the maximum of interconnected packet commands.
- * The packet commands are stored in the circular array pc_stack.
- * pc_stack_index points to the last used entry, and warps around
- * to the start when we get to the last array entry.
- *
- * pc points to the current processed packet command.
- *
* failed_pc points to the last failed packet command, or contains
* NULL if we do not need to retry any packet command. This is
* required since an additional packet command is needed before the
* retry, to get detailed information on what went wrong.
*/
- /* Current packet command */
- idetape_pc_t *pc;
/* Last failed packet command */
- idetape_pc_t *failed_pc;
- /* Packet command stack */
- idetape_pc_t pc_stack[IDETAPE_PC_STACK];
- /* Next free packet command storage space */
- int pc_stack_index;
- struct request rq_stack[IDETAPE_PC_STACK];
- /* We implement a circular array */
- int rq_stack_index;
+ struct ide_atapi_pc *failed_pc;
+ /* used by REQ_IDETAPE_{READ,WRITE} requests */
+ struct ide_atapi_pc queued_pc;
/*
- * DSC polling variables.
+ * DSC polling variables.
*
- * While polling for DSC we use postponed_rq to postpone the
- * current request so that ide.c will be able to service
- * pending requests on the other device. Note that at most
- * we will have only one DSC (usually data transfer) request
- * in the device request queue. Additional requests can be
- * queued in our internal pipeline, but they will be visible
- * to ide.c only one at a time.
+ * While polling for DSC we use postponed_rq to postpone the current
+ * request so that ide.c will be able to service pending requests on the
+ * other device. Note that at most we will have only one DSC (usually
+ * data transfer) request in the device request queue.
*/
struct request *postponed_rq;
/* The time in which we started polling for DSC */
/* Timer used to poll for dsc */
struct timer_list dsc_timer;
/* Read/Write dsc polling frequency */
- unsigned long best_dsc_rw_frequency;
- /* The current polling frequency */
- unsigned long dsc_polling_frequency;
- /* Maximum waiting time */
+ unsigned long best_dsc_rw_freq;
+ unsigned long dsc_poll_freq;
unsigned long dsc_timeout;
- /*
- * Read position information
- */
+ /* Read position information */
u8 partition;
/* Current block */
- unsigned int first_frame_position;
- unsigned int last_frame_position;
- unsigned int blocks_in_buffer;
+ unsigned int first_frame;
- /*
- * Last error information
- */
+ /* Last error information */
u8 sense_key, asc, ascq;
- /*
- * Character device operation
- */
+ /* Character device operation */
unsigned int minor;
/* device name */
char name[4];
/* Current character device data transfer direction */
- idetape_chrdev_direction_t chrdev_direction;
+ u8 chrdev_dir;
- /*
- * Device information
- */
- /* Usually 512 or 1024 bytes */
- unsigned short tape_block_size;
+ /* tape block size, usually 512 or 1024 bytes */
+ unsigned short blk_size;
int user_bs_factor;
+
/* Copy of the tape's Capabilities and Mechanical Page */
- idetape_capabilities_page_t capabilities;
+ u8 caps[20];
/*
- * Active data transfer request parameters.
+ * Active data transfer request parameters.
*
- * At most, there is only one ide-tape originated data transfer
- * request in the device request queue. This allows ide.c to
- * easily service requests from the other device when we
- * postpone our active request. In the pipelined operation
- * mode, we use our internal pipeline structure to hold
- * more data requests.
- *
- * The data buffer size is chosen based on the tape's
- * recommendation.
+ * At most, there is only one ide-tape originated data transfer request
+ * in the device request queue. This allows ide.c to easily service
+ * requests from the other device when we postpone our active request.
*/
- /* Pointer to the request which is waiting in the device request queue */
- struct request *active_data_request;
- /* Data buffer size (chosen based on the tape's recommendation */
- int stage_size;
- idetape_stage_t *merge_stage;
- int merge_stage_size;
+
+ /* Data buffer size chosen based on the tape's recommendation */
+ int buffer_size;
+ /* merge buffer */
+ struct idetape_bh *merge_bh;
+ /* size of the merge buffer */
+ int merge_bh_size;
+ /* pointer to current buffer head within the merge buffer */
struct idetape_bh *bh;
char *b_data;
int b_count;
-
- /*
- * Pipeline parameters.
- *
- * To accomplish non-pipelined mode, we simply set the following
- * variables to zero (or NULL, where appropriate).
- */
- /* Number of currently used stages */
- int nr_stages;
- /* Number of pending stages */
- int nr_pending_stages;
- /* We will not allocate more than this number of stages */
- int max_stages, min_pipeline, max_pipeline;
- /* The first stage which will be removed from the pipeline */
- idetape_stage_t *first_stage;
- /* The currently active stage */
- idetape_stage_t *active_stage;
- /* Will be serviced after the currently active request */
- idetape_stage_t *next_stage;
- /* New requests will be added to the pipeline here */
- idetape_stage_t *last_stage;
- /* Optional free stage which we can use */
- idetape_stage_t *cache_stage;
- int pages_per_stage;
+
+ int pages_per_buffer;
/* Wasted space in each stage */
int excess_bh_size;
- /* Status/Action flags: long for set_bit */
- unsigned long flags;
/* protects the ide-tape queue */
- spinlock_t spinlock;
+ spinlock_t lock;
- /*
- * Measures average tape speed
- */
+ /* Measures average tape speed */
unsigned long avg_time;
int avg_size;
int avg_speed;
- /* last sense information */
- idetape_request_sense_result_t sense;
-
- char vendor_id[10];
- char product_id[18];
- char firmware_revision[6];
- int firmware_revision_num;
-
/* the door is currently locked */
int door_locked;
/* the tape hardware is write protected */
/* the tape is write protected (hardware or opened as read-only) */
char write_prot;
- /*
- * Limit the number of times a request can
- * be postponed, to avoid an infinite postpone
- * deadlock.
- */
- /* request postpone count limit */
- int postpone_cnt;
-
- /*
- * Measures number of frames:
- *
- * 1. written/read to/from the driver pipeline (pipeline_head).
- * 2. written/read to/from the tape buffers (idetape_bh).
- * 3. written/read by the tape to/from the media (tape_head).
- */
- int pipeline_head;
- int buffer_head;
- int tape_head;
- int last_tape_head;
-
- /*
- * Speed control at the tape buffers input/output
- */
- unsigned long insert_time;
- int insert_size;
- int insert_speed;
- int max_insert_speed;
- int measure_insert_time;
-
- /*
- * Measure tape still time, in milliseconds
- */
- unsigned long tape_still_time_begin;
- int tape_still_time;
-
- /*
- * Speed regulation negative feedback loop
- */
- int speed_control;
- int pipeline_head_speed;
- int controlled_pipeline_head_speed;
- int uncontrolled_pipeline_head_speed;
- int controlled_last_pipeline_head;
- int uncontrolled_last_pipeline_head;
- unsigned long uncontrolled_pipeline_head_time;
- unsigned long controlled_pipeline_head_time;
- int controlled_previous_pipeline_head;
- int uncontrolled_previous_pipeline_head;
- unsigned long controlled_previous_head_time;
- unsigned long uncontrolled_previous_head_time;
- int restart_speed_control_req;
-
- /*
- * Debug_level determines amount of debugging output;
- * can be changed using /proc/ide/hdx/settings
- * 0 : almost no debugging output
- * 1 : 0+output errors only
- * 2 : 1+output all sensekey/asc
- * 3 : 2+follow all chrdev related procedures
- * 4 : 3+follow all procedures
- * 5 : 4+include pc_stack rq_stack info
- * 6 : 5+USE_COUNT updates
- */
- int debug_level;
+ u32 debug_mask;
} idetape_tape_t;
static DEFINE_MUTEX(idetape_ref_mutex);
static struct class *idetape_sysfs_class;
-#define to_ide_tape(obj) container_of(obj, struct ide_tape_obj, kref)
-
-#define ide_tape_g(disk) \
- container_of((disk)->private_data, struct ide_tape_obj, driver)
+static void ide_tape_release(struct device *);
static struct ide_tape_obj *ide_tape_get(struct gendisk *disk)
{
struct ide_tape_obj *tape = NULL;
mutex_lock(&idetape_ref_mutex);
- tape = ide_tape_g(disk);
- if (tape)
- kref_get(&tape->kref);
+ tape = ide_drv_g(disk, ide_tape_obj);
+ if (tape) {
+ if (ide_device_get(tape->drive))
+ tape = NULL;
+ else
+ get_device(&tape->dev);
+ }
mutex_unlock(&idetape_ref_mutex);
return tape;
}
-static void ide_tape_release(struct kref *);
-
static void ide_tape_put(struct ide_tape_obj *tape)
{
+ ide_drive_t *drive = tape->drive;
+
mutex_lock(&idetape_ref_mutex);
- kref_put(&tape->kref, ide_tape_release);
+ put_device(&tape->dev);
+ ide_device_put(drive);
mutex_unlock(&idetape_ref_mutex);
}
/*
- * Tape door status
- */
-#define DOOR_UNLOCKED 0
-#define DOOR_LOCKED 1
-#define DOOR_EXPLICITLY_LOCKED 2
-
-/*
- * Tape flag bits values.
- */
-#define IDETAPE_IGNORE_DSC 0
-#define IDETAPE_ADDRESS_VALID 1 /* 0 When the tape position is unknown */
-#define IDETAPE_BUSY 2 /* Device already opened */
-#define IDETAPE_PIPELINE_ERROR 3 /* Error detected in a pipeline stage */
-#define IDETAPE_DETECT_BS 4 /* Attempt to auto-detect the current user block size */
-#define IDETAPE_FILEMARK 5 /* Currently on a filemark */
-#define IDETAPE_DRQ_INTERRUPT 6 /* DRQ interrupt device */
-#define IDETAPE_READ_ERROR 7
-#define IDETAPE_PIPELINE_ACTIVE 8 /* pipeline active */
-/* 0 = no tape is loaded, so we don't rewind after ejecting */
-#define IDETAPE_MEDIUM_PRESENT 9
-
-/*
- * Supported ATAPI tape drives packet commands
- */
-#define IDETAPE_TEST_UNIT_READY_CMD 0x00
-#define IDETAPE_REWIND_CMD 0x01
-#define IDETAPE_REQUEST_SENSE_CMD 0x03
-#define IDETAPE_READ_CMD 0x08
-#define IDETAPE_WRITE_CMD 0x0a
-#define IDETAPE_WRITE_FILEMARK_CMD 0x10
-#define IDETAPE_SPACE_CMD 0x11
-#define IDETAPE_INQUIRY_CMD 0x12
-#define IDETAPE_ERASE_CMD 0x19
-#define IDETAPE_MODE_SENSE_CMD 0x1a
-#define IDETAPE_MODE_SELECT_CMD 0x15
-#define IDETAPE_LOAD_UNLOAD_CMD 0x1b
-#define IDETAPE_PREVENT_CMD 0x1e
-#define IDETAPE_LOCATE_CMD 0x2b
-#define IDETAPE_READ_POSITION_CMD 0x34
-#define IDETAPE_READ_BUFFER_CMD 0x3c
-#define IDETAPE_SET_SPEED_CMD 0xbb
-
-/*
- * Some defines for the READ BUFFER command
+ * The variables below are used for the character device interface. Additional
+ * state variables are defined in our ide_drive_t structure.
*/
-#define IDETAPE_RETRIEVE_FAULTY_BLOCK 6
-
-/*
- * Some defines for the SPACE command
- */
-#define IDETAPE_SPACE_OVER_FILEMARK 1
-#define IDETAPE_SPACE_TO_EOD 3
-
-/*
- * Some defines for the LOAD UNLOAD command
- */
-#define IDETAPE_LU_LOAD_MASK 1
-#define IDETAPE_LU_RETENSION_MASK 2
-#define IDETAPE_LU_EOT_MASK 4
-
-/*
- * Special requests for our block device strategy routine.
- *
- * In order to service a character device command, we add special
- * requests to the tail of our block device request queue and wait
- * for their completion.
- */
-
-enum {
- REQ_IDETAPE_PC1 = (1 << 0), /* packet command (first stage) */
- REQ_IDETAPE_PC2 = (1 << 1), /* packet command (second stage) */
- REQ_IDETAPE_READ = (1 << 2),
- REQ_IDETAPE_WRITE = (1 << 3),
- REQ_IDETAPE_READ_BUFFER = (1 << 4),
-};
-
-/*
- * Error codes which are returned in rq->errors to the higher part
- * of the driver.
- */
-#define IDETAPE_ERROR_GENERAL 101
-#define IDETAPE_ERROR_FILEMARK 102
-#define IDETAPE_ERROR_EOD 103
-
-/*
- * The following is used to format the general configuration word of
- * the ATAPI IDENTIFY DEVICE command.
- */
-struct idetape_id_gcw {
- unsigned packet_size :2; /* Packet Size */
- unsigned reserved234 :3; /* Reserved */
- unsigned drq_type :2; /* Command packet DRQ type */
- unsigned removable :1; /* Removable media */
- unsigned device_type :5; /* Device type */
- unsigned reserved13 :1; /* Reserved */
- unsigned protocol :2; /* Protocol type */
-};
-
-/*
- * INQUIRY packet command - Data Format (From Table 6-8 of QIC-157C)
- */
-typedef struct {
- unsigned device_type :5; /* Peripheral Device Type */
- unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */
- unsigned reserved1_6t0 :7; /* Reserved */
- unsigned rmb :1; /* Removable Medium Bit */
- unsigned ansi_version :3; /* ANSI Version */
- unsigned ecma_version :3; /* ECMA Version */
- unsigned iso_version :2; /* ISO Version */
- unsigned response_format :4; /* Response Data Format */
- unsigned reserved3_45 :2; /* Reserved */
- unsigned reserved3_6 :1; /* TrmIOP - Reserved */
- unsigned reserved3_7 :1; /* AENC - Reserved */
- __u8 additional_length; /* Additional Length (total_length-4) */
- __u8 rsv5, rsv6, rsv7; /* Reserved */
- __u8 vendor_id[8]; /* Vendor Identification */
- __u8 product_id[16]; /* Product Identification */
- __u8 revision_level[4]; /* Revision Level */
- __u8 vendor_specific[20]; /* Vendor Specific - Optional */
- __u8 reserved56t95[40]; /* Reserved - Optional */
- /* Additional information may be returned */
-} idetape_inquiry_result_t;
-
-/*
- * READ POSITION packet command - Data Format (From Table 6-57)
- */
-typedef struct {
- unsigned reserved0_10 :2; /* Reserved */
- unsigned bpu :1; /* Block Position Unknown */
- unsigned reserved0_543 :3; /* Reserved */
- unsigned eop :1; /* End Of Partition */
- unsigned bop :1; /* Beginning Of Partition */
- u8 partition; /* Partition Number */
- u8 reserved2, reserved3; /* Reserved */
- u32 first_block; /* First Block Location */
- u32 last_block; /* Last Block Location (Optional) */
- u8 reserved12; /* Reserved */
- u8 blocks_in_buffer[3]; /* Blocks In Buffer - (Optional) */
- u32 bytes_in_buffer; /* Bytes In Buffer (Optional) */
-} idetape_read_position_result_t;
-
-/*
- * Follows structures which are related to the SELECT SENSE / MODE SENSE
- * packet commands. Those packet commands are still not supported
- * by ide-tape.
- */
-#define IDETAPE_BLOCK_DESCRIPTOR 0
-#define IDETAPE_CAPABILITIES_PAGE 0x2a
-#define IDETAPE_PARAMTR_PAGE 0x2b /* Onstream DI-x0 only */
-#define IDETAPE_BLOCK_SIZE_PAGE 0x30
-#define IDETAPE_BUFFER_FILLING_PAGE 0x33
-
-/*
- * Mode Parameter Header for the MODE SENSE packet command
- */
-typedef struct {
- __u8 mode_data_length; /* Length of the following data transfer */
- __u8 medium_type; /* Medium Type */
- __u8 dsp; /* Device Specific Parameter */
- __u8 bdl; /* Block Descriptor Length */
-#if 0
- /* data transfer page */
- __u8 page_code :6;
- __u8 reserved0_6 :1;
- __u8 ps :1; /* parameters saveable */
- __u8 page_length; /* page Length == 0x02 */
- __u8 reserved2;
- __u8 read32k :1; /* 32k blk size (data only) */
- __u8 read32k5 :1; /* 32.5k blk size (data&AUX) */
- __u8 reserved3_23 :2;
- __u8 write32k :1; /* 32k blk size (data only) */
- __u8 write32k5 :1; /* 32.5k blk size (data&AUX) */
- __u8 reserved3_6 :1;
- __u8 streaming :1; /* streaming mode enable */
-#endif
-} idetape_mode_parameter_header_t;
-
-/*
- * Mode Parameter Block Descriptor the MODE SENSE packet command
- *
- * Support for block descriptors is optional.
- */
-typedef struct {
- __u8 density_code; /* Medium density code */
- __u8 blocks[3]; /* Number of blocks */
- __u8 reserved4; /* Reserved */
- __u8 length[3]; /* Block Length */
-} idetape_parameter_block_descriptor_t;
-
-/*
- * The Data Compression Page, as returned by the MODE SENSE packet command.
- */
-typedef struct {
- unsigned page_code :6; /* Page Code - Should be 0xf */
- unsigned reserved0 :1; /* Reserved */
- unsigned ps :1;
- __u8 page_length; /* Page Length - Should be 14 */
- unsigned reserved2 :6; /* Reserved */
- unsigned dcc :1; /* Data Compression Capable */
- unsigned dce :1; /* Data Compression Enable */
- unsigned reserved3 :5; /* Reserved */
- unsigned red :2; /* Report Exception on Decompression */
- unsigned dde :1; /* Data Decompression Enable */
- __u32 ca; /* Compression Algorithm */
- __u32 da; /* Decompression Algorithm */
- __u8 reserved[4]; /* Reserved */
-} idetape_data_compression_page_t;
-
-/*
- * The Medium Partition Page, as returned by the MODE SENSE packet command.
- */
-typedef struct {
- unsigned page_code :6; /* Page Code - Should be 0x11 */
- unsigned reserved1_6 :1; /* Reserved */
- unsigned ps :1;
- __u8 page_length; /* Page Length - Should be 6 */
- __u8 map; /* Maximum Additional Partitions - Should be 0 */
- __u8 apd; /* Additional Partitions Defined - Should be 0 */
- unsigned reserved4_012 :3; /* Reserved */
- unsigned psum :2; /* Should be 0 */
- unsigned idp :1; /* Should be 0 */
- unsigned sdp :1; /* Should be 0 */
- unsigned fdp :1; /* Fixed Data Partitions */
- __u8 mfr; /* Medium Format Recognition */
- __u8 reserved[2]; /* Reserved */
-} idetape_medium_partition_page_t;
-
-/*
- * Run time configurable parameters.
- */
-typedef struct {
- int dsc_rw_frequency;
- int dsc_media_access_frequency;
- int nr_stages;
-} idetape_config_t;
-
-/*
- * The variables below are used for the character device interface.
- * Additional state variables are defined in our ide_drive_t structure.
- */
-static struct ide_tape_obj * idetape_devs[MAX_HWIFS * MAX_DRIVES];
-
-#define ide_tape_f(file) ((file)->private_data)
+static struct ide_tape_obj *idetape_devs[MAX_HWIFS * MAX_DRIVES];
static struct ide_tape_obj *ide_tape_chrdev_get(unsigned int i)
{
mutex_lock(&idetape_ref_mutex);
tape = idetape_devs[i];
if (tape)
- kref_get(&tape->kref);
+ get_device(&tape->dev);
mutex_unlock(&idetape_ref_mutex);
return tape;
}
-/*
- * Function declarations
- *
- */
-static int idetape_chrdev_release (struct inode *inode, struct file *filp);
-static void idetape_write_release (ide_drive_t *drive, unsigned int minor);
-
-/*
- * Too bad. The drive wants to send us data which we are not ready to accept.
- * Just throw it away.
- */
-static void idetape_discard_data (ide_drive_t *drive, unsigned int bcount)
-{
- while (bcount--)
- (void) HWIF(drive)->INB(IDE_DATA_REG);
-}
-
-static void idetape_input_buffers (ide_drive_t *drive, idetape_pc_t *pc, unsigned int bcount)
+static void idetape_input_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
+ unsigned int bcount)
{
struct idetape_bh *bh = pc->bh;
int count;
while (bcount) {
-#if IDETAPE_DEBUG_BUGS
if (bh == NULL) {
printk(KERN_ERR "ide-tape: bh == NULL in "
"idetape_input_buffers\n");
- idetape_discard_data(drive, bcount);
+ ide_pad_transfer(drive, 0, bcount);
return;
}
-#endif /* IDETAPE_DEBUG_BUGS */
- count = min((unsigned int)(bh->b_size - atomic_read(&bh->b_count)), bcount);
- HWIF(drive)->atapi_input_bytes(drive, bh->b_data + atomic_read(&bh->b_count), count);
+ count = min(
+ (unsigned int)(bh->b_size - atomic_read(&bh->b_count)),
+ bcount);
+ drive->hwif->tp_ops->input_data(drive, NULL, bh->b_data +
+ atomic_read(&bh->b_count), count);
bcount -= count;
atomic_add(count, &bh->b_count);
if (atomic_read(&bh->b_count) == bh->b_size) {
pc->bh = bh;
}
-static void idetape_output_buffers (ide_drive_t *drive, idetape_pc_t *pc, unsigned int bcount)
+static void idetape_output_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
+ unsigned int bcount)
{
struct idetape_bh *bh = pc->bh;
int count;
while (bcount) {
-#if IDETAPE_DEBUG_BUGS
if (bh == NULL) {
- printk(KERN_ERR "ide-tape: bh == NULL in "
- "idetape_output_buffers\n");
+ printk(KERN_ERR "ide-tape: bh == NULL in %s\n",
+ __func__);
return;
}
-#endif /* IDETAPE_DEBUG_BUGS */
count = min((unsigned int)pc->b_count, (unsigned int)bcount);
- HWIF(drive)->atapi_output_bytes(drive, pc->b_data, count);
+ drive->hwif->tp_ops->output_data(drive, NULL, pc->b_data, count);
bcount -= count;
pc->b_data += count;
pc->b_count -= count;
if (!pc->b_count) {
- pc->bh = bh = bh->b_reqnext;
+ bh = bh->b_reqnext;
+ pc->bh = bh;
if (bh) {
pc->b_data = bh->b_data;
pc->b_count = atomic_read(&bh->b_count);
}
}
-static void idetape_update_buffers (idetape_pc_t *pc)
+static void idetape_update_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc)
{
struct idetape_bh *bh = pc->bh;
int count;
- unsigned int bcount = pc->actually_transferred;
+ unsigned int bcount = pc->xferred;
- if (test_bit(PC_WRITING, &pc->flags))
+ if (pc->flags & PC_FLAG_WRITING)
return;
while (bcount) {
-#if IDETAPE_DEBUG_BUGS
if (bh == NULL) {
- printk(KERN_ERR "ide-tape: bh == NULL in "
- "idetape_update_buffers\n");
+ printk(KERN_ERR "ide-tape: bh == NULL in %s\n",
+ __func__);
return;
}
-#endif /* IDETAPE_DEBUG_BUGS */
count = min((unsigned int)bh->b_size, (unsigned int)bcount);
atomic_set(&bh->b_count, count);
if (atomic_read(&bh->b_count) == bh->b_size)
}
/*
- * idetape_next_pc_storage returns a pointer to a place in which we can
- * safely store a packet command, even though we intend to leave the
- * driver. A storage space for a maximum of IDETAPE_PC_STACK packet
- * commands is allocated at initialization time.
+ * called on each failed packet command retry to analyze the request sense. We
+ * currently do not utilize this information.
*/
-static idetape_pc_t *idetape_next_pc_storage (ide_drive_t *drive)
+static void idetape_analyze_error(ide_drive_t *drive, u8 *sense)
{
idetape_tape_t *tape = drive->driver_data;
+ struct ide_atapi_pc *pc = tape->failed_pc;
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 5)
- printk(KERN_INFO "ide-tape: pc_stack_index=%d\n",
- tape->pc_stack_index);
-#endif /* IDETAPE_DEBUG_LOG */
- if (tape->pc_stack_index == IDETAPE_PC_STACK)
- tape->pc_stack_index=0;
- return (&tape->pc_stack[tape->pc_stack_index++]);
-}
+ tape->sense_key = sense[2] & 0xF;
+ tape->asc = sense[12];
+ tape->ascq = sense[13];
-/*
- * idetape_next_rq_storage is used along with idetape_next_pc_storage.
- * Since we queue packet commands in the request queue, we need to
- * allocate a request, along with the allocation of a packet command.
- */
-
-/**************************************************************
- * *
- * This should get fixed to use kmalloc(.., GFP_ATOMIC) *
- * followed later on by kfree(). -ml *
- * *
- **************************************************************/
-
-static struct request *idetape_next_rq_storage (ide_drive_t *drive)
-{
- idetape_tape_t *tape = drive->driver_data;
-
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 5)
- printk(KERN_INFO "ide-tape: rq_stack_index=%d\n",
- tape->rq_stack_index);
-#endif /* IDETAPE_DEBUG_LOG */
- if (tape->rq_stack_index == IDETAPE_PC_STACK)
- tape->rq_stack_index=0;
- return (&tape->rq_stack[tape->rq_stack_index++]);
-}
+ debug_log(DBG_ERR, "pc = %x, sense key = %x, asc = %x, ascq = %x\n",
+ pc->c[0], tape->sense_key, tape->asc, tape->ascq);
-/*
- * idetape_init_pc initializes a packet command.
- */
-static void idetape_init_pc (idetape_pc_t *pc)
-{
- memset(pc->c, 0, 12);
- pc->retries = 0;
- pc->flags = 0;
- pc->request_transfer = 0;
- pc->buffer = pc->pc_buffer;
- pc->buffer_size = IDETAPE_PC_BUFFER_SIZE;
- pc->bh = NULL;
- pc->b_data = NULL;
-}
-
-/*
- * idetape_analyze_error is called on each failed packet command retry
- * to analyze the request sense. We currently do not utilize this
- * information.
- */
-static void idetape_analyze_error (ide_drive_t *drive, idetape_request_sense_result_t *result)
-{
- idetape_tape_t *tape = drive->driver_data;
- idetape_pc_t *pc = tape->failed_pc;
-
- tape->sense = *result;
- tape->sense_key = result->sense_key;
- tape->asc = result->asc;
- tape->ascq = result->ascq;
-#if IDETAPE_DEBUG_LOG
- /*
- * Without debugging, we only log an error if we decided to
- * give up retrying.
- */
- if (tape->debug_level >= 1)
- printk(KERN_INFO "ide-tape: pc = %x, sense key = %x, "
- "asc = %x, ascq = %x\n",
- pc->c[0], result->sense_key,
- result->asc, result->ascq);
-#endif /* IDETAPE_DEBUG_LOG */
-
- /*
- * Correct pc->actually_transferred by asking the tape.
- */
- if (test_bit(PC_DMA_ERROR, &pc->flags)) {
- pc->actually_transferred = pc->request_transfer - tape->tape_block_size * ntohl(get_unaligned(&result->information));
- idetape_update_buffers(pc);
+ /* Correct pc->xferred by asking the tape. */
+ if (pc->flags & PC_FLAG_DMA_ERROR) {
+ pc->xferred = pc->req_xfer -
+ tape->blk_size *
+ get_unaligned_be32(&sense[3]);
+ idetape_update_buffers(drive, pc);
}
/*
* with sense key=5, asc=0x22, ascq=0, let it slide. Some drives
* (i.e. Seagate STT3401A Travan) don't support 0-length read/writes.
*/
- if ((pc->c[0] == IDETAPE_READ_CMD || pc->c[0] == IDETAPE_WRITE_CMD)
- && pc->c[4] == 0 && pc->c[3] == 0 && pc->c[2] == 0) { /* length==0 */
- if (result->sense_key == 5) {
+ if ((pc->c[0] == READ_6 || pc->c[0] == WRITE_6)
+ /* length == 0 */
+ && pc->c[4] == 0 && pc->c[3] == 0 && pc->c[2] == 0) {
+ if (tape->sense_key == 5) {
/* don't report an error, everything's ok */
pc->error = 0;
/* don't retry read/write */
- set_bit(PC_ABORT, &pc->flags);
+ pc->flags |= PC_FLAG_ABORT;
}
}
- if (pc->c[0] == IDETAPE_READ_CMD && result->filemark) {
+ if (pc->c[0] == READ_6 && (sense[2] & 0x80)) {
pc->error = IDETAPE_ERROR_FILEMARK;
- set_bit(PC_ABORT, &pc->flags);
+ pc->flags |= PC_FLAG_ABORT;
}
- if (pc->c[0] == IDETAPE_WRITE_CMD) {
- if (result->eom ||
- (result->sense_key == 0xd && result->asc == 0x0 &&
- result->ascq == 0x2)) {
+ if (pc->c[0] == WRITE_6) {
+ if ((sense[2] & 0x40) || (tape->sense_key == 0xd
+ && tape->asc == 0x0 && tape->ascq == 0x2)) {
pc->error = IDETAPE_ERROR_EOD;
- set_bit(PC_ABORT, &pc->flags);
+ pc->flags |= PC_FLAG_ABORT;
}
}
- if (pc->c[0] == IDETAPE_READ_CMD || pc->c[0] == IDETAPE_WRITE_CMD) {
- if (result->sense_key == 8) {
+ if (pc->c[0] == READ_6 || pc->c[0] == WRITE_6) {
+ if (tape->sense_key == 8) {
pc->error = IDETAPE_ERROR_EOD;
- set_bit(PC_ABORT, &pc->flags);
+ pc->flags |= PC_FLAG_ABORT;
}
- if (!test_bit(PC_ABORT, &pc->flags) &&
- pc->actually_transferred)
+ if (!(pc->flags & PC_FLAG_ABORT) &&
+ pc->xferred)
pc->retries = IDETAPE_MAX_PC_RETRIES + 1;
}
}
-/*
- * idetape_active_next_stage will declare the next stage as "active".
- */
-static void idetape_active_next_stage (ide_drive_t *drive)
+/* Free data buffers completely. */
+static void ide_tape_kfree_buffer(idetape_tape_t *tape)
{
- idetape_tape_t *tape = drive->driver_data;
- idetape_stage_t *stage = tape->next_stage;
- struct request *rq = &stage->rq;
+ struct idetape_bh *prev_bh, *bh = tape->merge_bh;
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 4)
- printk(KERN_INFO "ide-tape: Reached idetape_active_next_stage\n");
-#endif /* IDETAPE_DEBUG_LOG */
-#if IDETAPE_DEBUG_BUGS
- if (stage == NULL) {
- printk(KERN_ERR "ide-tape: bug: Trying to activate a non existing stage\n");
- return;
- }
-#endif /* IDETAPE_DEBUG_BUGS */
+ while (bh) {
+ u32 size = bh->b_size;
- rq->rq_disk = tape->disk;
- rq->buffer = NULL;
- rq->special = (void *)stage->bh;
- tape->active_data_request = rq;
- tape->active_stage = stage;
- tape->next_stage = stage->next;
-}
+ while (size) {
+ unsigned int order = fls(size >> PAGE_SHIFT)-1;
-/*
- * idetape_increase_max_pipeline_stages is a part of the feedback
- * loop which tries to find the optimum number of stages. In the
- * feedback loop, we are starting from a minimum maximum number of
- * stages, and if we sense that the pipeline is empty, we try to
- * increase it, until we reach the user compile time memory limit.
- */
-static void idetape_increase_max_pipeline_stages (ide_drive_t *drive)
-{
- idetape_tape_t *tape = drive->driver_data;
- int increase = (tape->max_pipeline - tape->min_pipeline) / 10;
-
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 4)
- printk (KERN_INFO "ide-tape: Reached idetape_increase_max_pipeline_stages\n");
-#endif /* IDETAPE_DEBUG_LOG */
+ if (bh->b_data)
+ free_pages((unsigned long)bh->b_data, order);
- tape->max_stages += max(increase, 1);
- tape->max_stages = max(tape->max_stages, tape->min_pipeline);
- tape->max_stages = min(tape->max_stages, tape->max_pipeline);
-}
-
-/*
- * idetape_kfree_stage calls kfree to completely free a stage, along with
- * its related buffers.
- */
-static void __idetape_kfree_stage (idetape_stage_t *stage)
-{
- struct idetape_bh *prev_bh, *bh = stage->bh;
- int size;
-
- while (bh != NULL) {
- if (bh->b_data != NULL) {
- size = (int) bh->b_size;
- while (size > 0) {
- free_page((unsigned long) bh->b_data);
- size -= PAGE_SIZE;
- bh->b_data += PAGE_SIZE;
- }
+ size &= (order-1);
+ bh->b_data += (1 << order) * PAGE_SIZE;
}
prev_bh = bh;
bh = bh->b_reqnext;
kfree(prev_bh);
}
- kfree(stage);
-}
-
-static void idetape_kfree_stage (idetape_tape_t *tape, idetape_stage_t *stage)
-{
- __idetape_kfree_stage(stage);
-}
-
-/*
- * idetape_remove_stage_head removes tape->first_stage from the pipeline.
- * The caller should avoid race conditions.
- */
-static void idetape_remove_stage_head (ide_drive_t *drive)
-{
- idetape_tape_t *tape = drive->driver_data;
- idetape_stage_t *stage;
-
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 4)
- printk(KERN_INFO "ide-tape: Reached idetape_remove_stage_head\n");
-#endif /* IDETAPE_DEBUG_LOG */
-#if IDETAPE_DEBUG_BUGS
- if (tape->first_stage == NULL) {
- printk(KERN_ERR "ide-tape: bug: tape->first_stage is NULL\n");
- return;
- }
- if (tape->active_stage == tape->first_stage) {
- printk(KERN_ERR "ide-tape: bug: Trying to free our active pipeline stage\n");
- return;
- }
-#endif /* IDETAPE_DEBUG_BUGS */
- stage = tape->first_stage;
- tape->first_stage = stage->next;
- idetape_kfree_stage(tape, stage);
- tape->nr_stages--;
- if (tape->first_stage == NULL) {
- tape->last_stage = NULL;
-#if IDETAPE_DEBUG_BUGS
- if (tape->next_stage != NULL)
- printk(KERN_ERR "ide-tape: bug: tape->next_stage != NULL\n");
- if (tape->nr_stages)
- printk(KERN_ERR "ide-tape: bug: nr_stages should be 0 now\n");
-#endif /* IDETAPE_DEBUG_BUGS */
- }
-}
-
-/*
- * This will free all the pipeline stages starting from new_last_stage->next
- * to the end of the list, and point tape->last_stage to new_last_stage.
- */
-static void idetape_abort_pipeline(ide_drive_t *drive,
- idetape_stage_t *new_last_stage)
-{
- idetape_tape_t *tape = drive->driver_data;
- idetape_stage_t *stage = new_last_stage->next;
- idetape_stage_t *nstage;
-
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 4)
- printk(KERN_INFO "ide-tape: %s: idetape_abort_pipeline called\n", tape->name);
-#endif
- while (stage) {
- nstage = stage->next;
- idetape_kfree_stage(tape, stage);
- --tape->nr_stages;
- --tape->nr_pending_stages;
- stage = nstage;
- }
- if (new_last_stage)
- new_last_stage->next = NULL;
- tape->last_stage = new_last_stage;
- tape->next_stage = NULL;
}
-/*
- * idetape_end_request is used to finish servicing a request, and to
- * insert a pending pipeline request into the main device queue.
- */
static int idetape_end_request(ide_drive_t *drive, int uptodate, int nr_sects)
{
- struct request *rq = HWGROUP(drive)->rq;
+ struct request *rq = drive->hwif->rq;
idetape_tape_t *tape = drive->driver_data;
unsigned long flags;
int error;
- int remove_stage = 0;
- idetape_stage_t *active_stage;
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 4)
- printk(KERN_INFO "ide-tape: Reached idetape_end_request\n");
-#endif /* IDETAPE_DEBUG_LOG */
+ debug_log(DBG_PROCS, "Enter %s\n", __func__);
switch (uptodate) {
- case 0: error = IDETAPE_ERROR_GENERAL; break;
- case 1: error = 0; break;
- default: error = uptodate;
+ case 0: error = IDETAPE_ERROR_GENERAL; break;
+ case 1: error = 0; break;
+ default: error = uptodate;
}
rq->errors = error;
if (error)
tape->failed_pc = NULL;
- spin_lock_irqsave(&tape->spinlock, flags);
-
- /* The request was a pipelined data transfer request */
- if (tape->active_data_request == rq) {
- active_stage = tape->active_stage;
- tape->active_stage = NULL;
- tape->active_data_request = NULL;
- tape->nr_pending_stages--;
- if (rq->cmd[0] & REQ_IDETAPE_WRITE) {
- remove_stage = 1;
- if (error) {
- set_bit(IDETAPE_PIPELINE_ERROR, &tape->flags);
- if (error == IDETAPE_ERROR_EOD)
- idetape_abort_pipeline(drive, active_stage);
- }
- } else if (rq->cmd[0] & REQ_IDETAPE_READ) {
- if (error == IDETAPE_ERROR_EOD) {
- set_bit(IDETAPE_PIPELINE_ERROR, &tape->flags);
- idetape_abort_pipeline(drive, active_stage);
- }
- }
- if (tape->next_stage != NULL) {
- idetape_active_next_stage(drive);
-
- /*
- * Insert the next request into the request queue.
- */
- (void) ide_do_drive_cmd(drive, tape->active_data_request, ide_end);
- } else if (!error) {
- idetape_increase_max_pipeline_stages(drive);
- }
+ if (!blk_special_request(rq)) {
+ ide_end_request(drive, uptodate, nr_sects);
+ return 0;
}
+
+ spin_lock_irqsave(&tape->lock, flags);
+
ide_end_drive_cmd(drive, 0, 0);
-// blkdev_dequeue_request(rq);
-// drive->rq = NULL;
-// end_that_request_last(rq);
-
- if (remove_stage)
- idetape_remove_stage_head(drive);
- if (tape->active_data_request == NULL)
- clear_bit(IDETAPE_PIPELINE_ACTIVE, &tape->flags);
- spin_unlock_irqrestore(&tape->spinlock, flags);
+
+ spin_unlock_irqrestore(&tape->lock, flags);
return 0;
}
-static ide_startstop_t idetape_request_sense_callback (ide_drive_t *drive)
+static void ide_tape_handle_dsc(ide_drive_t *);
+
+static void ide_tape_callback(ide_drive_t *drive, int dsc)
{
idetape_tape_t *tape = drive->driver_data;
+ struct ide_atapi_pc *pc = drive->pc;
+ int uptodate = pc->error ? 0 : 1;
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 4)
- printk(KERN_INFO "ide-tape: Reached idetape_request_sense_callback\n");
-#endif /* IDETAPE_DEBUG_LOG */
- if (!tape->pc->error) {
- idetape_analyze_error(drive, (idetape_request_sense_result_t *) tape->pc->buffer);
- idetape_end_request(drive, 1, 0);
- } else {
- printk(KERN_ERR "ide-tape: Error in REQUEST SENSE itself - Aborting request!\n");
- idetape_end_request(drive, 0, 0);
- }
- return ide_stopped;
-}
+ debug_log(DBG_PROCS, "Enter %s\n", __func__);
-static void idetape_create_request_sense_cmd (idetape_pc_t *pc)
-{
- idetape_init_pc(pc);
- pc->c[0] = IDETAPE_REQUEST_SENSE_CMD;
- pc->c[4] = 20;
- pc->request_transfer = 20;
- pc->callback = &idetape_request_sense_callback;
-}
+ if (dsc)
+ ide_tape_handle_dsc(drive);
-static void idetape_init_rq(struct request *rq, u8 cmd)
-{
- memset(rq, 0, sizeof(*rq));
- rq->cmd_type = REQ_TYPE_SPECIAL;
- rq->cmd[0] = cmd;
-}
+ if (tape->failed_pc == pc)
+ tape->failed_pc = NULL;
-/*
- * idetape_queue_pc_head generates a new packet command request in front
- * of the request queue, before the current request, so that it will be
- * processed immediately, on the next pass through the driver.
- *
- * idetape_queue_pc_head is called from the request handling part of
- * the driver (the "bottom" part). Safe storage for the request should
- * be allocated with idetape_next_pc_storage and idetape_next_rq_storage
- * before calling idetape_queue_pc_head.
- *
- * Memory for those requests is pre-allocated at initialization time, and
- * is limited to IDETAPE_PC_STACK requests. We assume that we have enough
- * space for the maximum possible number of inter-dependent packet commands.
- *
- * The higher level of the driver - The ioctl handler and the character
- * device handling functions should queue request to the lower level part
- * and wait for their completion using idetape_queue_pc_tail or
- * idetape_queue_rw_tail.
- */
-static void idetape_queue_pc_head (ide_drive_t *drive, idetape_pc_t *pc,struct request *rq)
-{
- struct ide_tape_obj *tape = drive->driver_data;
+ if (pc->c[0] == REQUEST_SENSE) {
+ if (uptodate)
+ idetape_analyze_error(drive, pc->buf);
+ else
+ printk(KERN_ERR "ide-tape: Error in REQUEST SENSE "
+ "itself - Aborting request!\n");
+ } else if (pc->c[0] == READ_6 || pc->c[0] == WRITE_6) {
+ struct request *rq = drive->hwif->rq;
+ int blocks = pc->xferred / tape->blk_size;
+
+ tape->avg_size += blocks * tape->blk_size;
+
+ if (time_after_eq(jiffies, tape->avg_time + HZ)) {
+ tape->avg_speed = tape->avg_size * HZ /
+ (jiffies - tape->avg_time) / 1024;
+ tape->avg_size = 0;
+ tape->avg_time = jiffies;
+ }
- idetape_init_rq(rq, REQ_IDETAPE_PC1);
- rq->buffer = (char *) pc;
- rq->rq_disk = tape->disk;
- (void) ide_do_drive_cmd(drive, rq, ide_preempt);
-}
+ tape->first_frame += blocks;
+ rq->current_nr_sectors -= blocks;
-/*
- * idetape_retry_pc is called when an error was detected during the
- * last packet command. We queue a request sense packet command in
- * the head of the request list.
- */
-static ide_startstop_t idetape_retry_pc (ide_drive_t *drive)
-{
- idetape_tape_t *tape = drive->driver_data;
- idetape_pc_t *pc;
- struct request *rq;
- atapi_error_t error;
-
- error.all = HWIF(drive)->INB(IDE_ERROR_REG);
- pc = idetape_next_pc_storage(drive);
- rq = idetape_next_rq_storage(drive);
- idetape_create_request_sense_cmd(pc);
- set_bit(IDETAPE_IGNORE_DSC, &tape->flags);
- idetape_queue_pc_head(drive, pc, rq);
- return ide_stopped;
-}
+ if (pc->error)
+ uptodate = pc->error;
+ } else if (pc->c[0] == READ_POSITION && uptodate) {
+ u8 *readpos = pc->buf;
-/*
- * idetape_postpone_request postpones the current request so that
- * ide.c will be able to service requests from another device on
- * the same hwgroup while we are polling for DSC.
- */
-static void idetape_postpone_request (ide_drive_t *drive)
-{
- idetape_tape_t *tape = drive->driver_data;
+ debug_log(DBG_SENSE, "BOP - %s\n",
+ (readpos[0] & 0x80) ? "Yes" : "No");
+ debug_log(DBG_SENSE, "EOP - %s\n",
+ (readpos[0] & 0x40) ? "Yes" : "No");
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 4)
- printk(KERN_INFO "ide-tape: idetape_postpone_request\n");
-#endif
- tape->postponed_rq = HWGROUP(drive)->rq;
- ide_stall_queue(drive, tape->dsc_polling_frequency);
+ if (readpos[0] & 0x4) {
+ printk(KERN_INFO "ide-tape: Block location is unknown"
+ "to the tape\n");
+ clear_bit(IDE_AFLAG_ADDRESS_VALID, &drive->atapi_flags);
+ uptodate = 0;
+ } else {
+ debug_log(DBG_SENSE, "Block Location - %u\n",
+ be32_to_cpup((__be32 *)&readpos[4]));
+
+ tape->partition = readpos[1];
+ tape->first_frame = be32_to_cpup((__be32 *)&readpos[4]);
+ set_bit(IDE_AFLAG_ADDRESS_VALID, &drive->atapi_flags);
+ }
+ }
+
+ idetape_end_request(drive, uptodate, 0);
}
/*
- * idetape_pc_intr is the usual interrupt handler which will be called
- * during a packet command. We will transfer some of the data (as
- * requested by the drive) and will re-point interrupt handler to us.
- * When data transfer is finished, we will act according to the
- * algorithm described before idetape_issue_packet_command.
- *
+ * Postpone the current request so that ide.c will be able to service requests
+ * from another device on the same port while we are polling for DSC.
*/
-static ide_startstop_t idetape_pc_intr (ide_drive_t *drive)
+static void idetape_postpone_request(ide_drive_t *drive)
{
- ide_hwif_t *hwif = drive->hwif;
idetape_tape_t *tape = drive->driver_data;
- atapi_status_t status;
- atapi_bcount_t bcount;
- atapi_ireason_t ireason;
- idetape_pc_t *pc = tape->pc;
-
- unsigned int temp;
-#if SIMULATE_ERRORS
- static int error_sim_count = 0;
-#endif
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 4)
- printk(KERN_INFO "ide-tape: Reached idetape_pc_intr "
- "interrupt handler\n");
-#endif /* IDETAPE_DEBUG_LOG */
-
- /* Clear the interrupt */
- status.all = HWIF(drive)->INB(IDE_STATUS_REG);
-
- if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
- if (HWIF(drive)->ide_dma_end(drive) || status.b.check) {
- /*
- * A DMA error is sometimes expected. For example,
- * if the tape is crossing a filemark during a
- * READ command, it will issue an irq and position
- * itself before the filemark, so that only a partial
- * data transfer will occur (which causes the DMA
- * error). In that case, we will later ask the tape
- * how much bytes of the original request were
- * actually transferred (we can't receive that
- * information from the DMA engine on most chipsets).
- */
-
- /*
- * On the contrary, a DMA error is never expected;
- * it usually indicates a hardware error or abort.
- * If the tape crosses a filemark during a READ
- * command, it will issue an irq and position itself
- * after the filemark (not before). Only a partial
- * data transfer will occur, but no DMA error.
- * (AS, 19 Apr 2001)
- */
- set_bit(PC_DMA_ERROR, &pc->flags);
- } else {
- pc->actually_transferred = pc->request_transfer;
- idetape_update_buffers(pc);
- }
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 4)
- printk(KERN_INFO "ide-tape: DMA finished\n");
-#endif /* IDETAPE_DEBUG_LOG */
- }
+ debug_log(DBG_PROCS, "Enter %s\n", __func__);
- /* No more interrupts */
- if (!status.b.drq) {
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 2)
- printk(KERN_INFO "ide-tape: Packet command completed, %d bytes transferred\n", pc->actually_transferred);
-#endif /* IDETAPE_DEBUG_LOG */
- clear_bit(PC_DMA_IN_PROGRESS, &pc->flags);
-
- local_irq_enable();
-
-#if SIMULATE_ERRORS
- if ((pc->c[0] == IDETAPE_WRITE_CMD ||
- pc->c[0] == IDETAPE_READ_CMD) &&
- (++error_sim_count % 100) == 0) {
- printk(KERN_INFO "ide-tape: %s: simulating error\n",
- tape->name);
- status.b.check = 1;
- }
-#endif
- if (status.b.check && pc->c[0] == IDETAPE_REQUEST_SENSE_CMD)
- status.b.check = 0;
- if (status.b.check || test_bit(PC_DMA_ERROR, &pc->flags)) { /* Error detected */
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 1)
- printk(KERN_INFO "ide-tape: %s: I/O error\n",
- tape->name);
-#endif /* IDETAPE_DEBUG_LOG */
- if (pc->c[0] == IDETAPE_REQUEST_SENSE_CMD) {
- printk(KERN_ERR "ide-tape: I/O error in request sense command\n");
- return ide_do_reset(drive);
- }
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 1)
- printk(KERN_INFO "ide-tape: [cmd %x]: check condition\n", pc->c[0]);
-#endif
- /* Retry operation */
- return idetape_retry_pc(drive);
- }
- pc->error = 0;
- if (test_bit(PC_WAIT_FOR_DSC, &pc->flags) &&
- !status.b.dsc) {
- /* Media access command */
- tape->dsc_polling_start = jiffies;
- tape->dsc_polling_frequency = IDETAPE_DSC_MA_FAST;
- tape->dsc_timeout = jiffies + IDETAPE_DSC_MA_TIMEOUT;
- /* Allow ide.c to handle other requests */
- idetape_postpone_request(drive);
- return ide_stopped;
- }
- if (tape->failed_pc == pc)
- tape->failed_pc = NULL;
- /* Command finished - Call the callback function */
- return pc->callback(drive);
- }
- if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
- printk(KERN_ERR "ide-tape: The tape wants to issue more "
- "interrupts in DMA mode\n");
- printk(KERN_ERR "ide-tape: DMA disabled, reverting to PIO\n");
- ide_dma_off(drive);
- return ide_do_reset(drive);
- }
- /* Get the number of bytes to transfer on this interrupt. */
- bcount.b.high = hwif->INB(IDE_BCOUNTH_REG);
- bcount.b.low = hwif->INB(IDE_BCOUNTL_REG);
+ tape->postponed_rq = drive->hwif->rq;
- ireason.all = hwif->INB(IDE_IREASON_REG);
+ ide_stall_queue(drive, tape->dsc_poll_freq);
+}
- if (ireason.b.cod) {
- printk(KERN_ERR "ide-tape: CoD != 0 in idetape_pc_intr\n");
- return ide_do_reset(drive);
- }
- if (ireason.b.io == test_bit(PC_WRITING, &pc->flags)) {
- /* Hopefully, we will never get here */
- printk(KERN_ERR "ide-tape: We wanted to %s, ",
- ireason.b.io ? "Write":"Read");
- printk(KERN_ERR "ide-tape: but the tape wants us to %s !\n",
- ireason.b.io ? "Read":"Write");
- return ide_do_reset(drive);
- }
- if (!test_bit(PC_WRITING, &pc->flags)) {
- /* Reading - Check that we have enough space */
- temp = pc->actually_transferred + bcount.all;
- if (temp > pc->request_transfer) {
- if (temp > pc->buffer_size) {
- printk(KERN_ERR "ide-tape: The tape wants to send us more data than expected - discarding data\n");
- idetape_discard_data(drive, bcount.all);
- ide_set_handler(drive, &idetape_pc_intr, IDETAPE_WAIT_CMD, NULL);
- return ide_started;
- }
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 2)
- printk(KERN_NOTICE "ide-tape: The tape wants to send us more data than expected - allowing transfer\n");
-#endif /* IDETAPE_DEBUG_LOG */
- }
- }
- if (test_bit(PC_WRITING, &pc->flags)) {
- if (pc->bh != NULL)
- idetape_output_buffers(drive, pc, bcount.all);
- else
- /* Write the current buffer */
- HWIF(drive)->atapi_output_bytes(drive, pc->current_position, bcount.all);
- } else {
- if (pc->bh != NULL)
- idetape_input_buffers(drive, pc, bcount.all);
- else
- /* Read the current buffer */
- HWIF(drive)->atapi_input_bytes(drive, pc->current_position, bcount.all);
- }
- /* Update the current position */
- pc->actually_transferred += bcount.all;
- pc->current_position += bcount.all;
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 2)
- printk(KERN_INFO "ide-tape: [cmd %x] transferred %d bytes on that interrupt\n", pc->c[0], bcount.all);
-#endif
- /* And set the interrupt handler again */
- ide_set_handler(drive, &idetape_pc_intr, IDETAPE_WAIT_CMD, NULL);
- return ide_started;
+static void ide_tape_handle_dsc(ide_drive_t *drive)
+{
+ idetape_tape_t *tape = drive->driver_data;
+
+ /* Media access command */
+ tape->dsc_polling_start = jiffies;
+ tape->dsc_poll_freq = IDETAPE_DSC_MA_FAST;
+ tape->dsc_timeout = jiffies + IDETAPE_DSC_MA_TIMEOUT;
+ /* Allow ide.c to handle other requests */
+ idetape_postpone_request(drive);
+}
+
+static int ide_tape_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
+ unsigned int bcount, int write)
+{
+ if (write)
+ idetape_output_buffers(drive, pc, bcount);
+ else
+ idetape_input_buffers(drive, pc, bcount);
+
+ return bcount;
}
/*
- * Packet Command Interface
+ * Packet Command Interface
*
- * The current Packet Command is available in tape->pc, and will not
- * change until we finish handling it. Each packet command is associated
- * with a callback function that will be called when the command is
- * finished.
+ * The current Packet Command is available in drive->pc, and will not change
+ * until we finish handling it. Each packet command is associated with a
+ * callback function that will be called when the command is finished.
*
- * The handling will be done in three stages:
+ * The handling will be done in three stages:
*
- * 1. idetape_issue_packet_command will send the packet command to the
- * drive, and will set the interrupt handler to idetape_pc_intr.
+ * 1. idetape_issue_pc will send the packet command to the drive, and will set
+ * the interrupt handler to ide_pc_intr.
*
- * 2. On each interrupt, idetape_pc_intr will be called. This step
- * will be repeated until the device signals us that no more
- * interrupts will be issued.
+ * 2. On each interrupt, ide_pc_intr will be called. This step will be
+ * repeated until the device signals us that no more interrupts will be issued.
*
- * 3. ATAPI Tape media access commands have immediate status with a
- * delayed process. In case of a successful initiation of a
- * media access packet command, the DSC bit will be set when the
- * actual execution of the command is finished.
- * Since the tape drive will not issue an interrupt, we have to
- * poll for this event. In this case, we define the request as
- * "low priority request" by setting rq_status to
- * IDETAPE_RQ_POSTPONED, set a timer to poll for DSC and exit
- * the driver.
+ * 3. ATAPI Tape media access commands have immediate status with a delayed
+ * process. In case of a successful initiation of a media access packet command,
+ * the DSC bit will be set when the actual execution of the command is finished.
+ * Since the tape drive will not issue an interrupt, we have to poll for this
+ * event. In this case, we define the request as "low priority request" by
+ * setting rq_status to IDETAPE_RQ_POSTPONED, set a timer to poll for DSC and
+ * exit the driver.
*
- * ide.c will then give higher priority to requests which
- * originate from the other device, until will change rq_status
- * to RQ_ACTIVE.
+ * ide.c will then give higher priority to requests which originate from the
+ * other device, until will change rq_status to RQ_ACTIVE.
*
- * 4. When the packet command is finished, it will be checked for errors.
+ * 4. When the packet command is finished, it will be checked for errors.
*
- * 5. In case an error was found, we queue a request sense packet
- * command in front of the request queue and retry the operation
- * up to IDETAPE_MAX_PC_RETRIES times.
- *
- * 6. In case no error was found, or we decided to give up and not
- * to retry again, the callback function will be called and then
- * we will handle the next request.
+ * 5. In case an error was found, we queue a request sense packet command in
+ * front of the request queue and retry the operation up to
+ * IDETAPE_MAX_PC_RETRIES times.
*
+ * 6. In case no error was found, or we decided to give up and not to retry
+ * again, the callback function will be called and then we will handle the next
+ * request.
*/
-static ide_startstop_t idetape_transfer_pc(ide_drive_t *drive)
-{
- ide_hwif_t *hwif = drive->hwif;
- idetape_tape_t *tape = drive->driver_data;
- idetape_pc_t *pc = tape->pc;
- atapi_ireason_t ireason;
- int retries = 100;
- ide_startstop_t startstop;
-
- if (ide_wait_stat(&startstop,drive,DRQ_STAT,BUSY_STAT,WAIT_READY)) {
- printk(KERN_ERR "ide-tape: Strange, packet command initiated yet DRQ isn't asserted\n");
- return startstop;
- }
- ireason.all = hwif->INB(IDE_IREASON_REG);
- while (retries-- && (!ireason.b.cod || ireason.b.io)) {
- printk(KERN_ERR "ide-tape: (IO,CoD != (0,1) while issuing "
- "a packet command, retrying\n");
- udelay(100);
- ireason.all = hwif->INB(IDE_IREASON_REG);
- if (retries == 0) {
- printk(KERN_ERR "ide-tape: (IO,CoD != (0,1) while "
- "issuing a packet command, ignoring\n");
- ireason.b.cod = 1;
- ireason.b.io = 0;
- }
- }
- if (!ireason.b.cod || ireason.b.io) {
- printk(KERN_ERR "ide-tape: (IO,CoD) != (0,1) while issuing "
- "a packet command\n");
- return ide_do_reset(drive);
- }
- /* Set the interrupt routine */
- ide_set_handler(drive, &idetape_pc_intr, IDETAPE_WAIT_CMD, NULL);
-#ifdef CONFIG_BLK_DEV_IDEDMA
- /* Begin DMA, if necessary */
- if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags))
- hwif->dma_start(drive);
-#endif
- /* Send the actual packet */
- HWIF(drive)->atapi_output_bytes(drive, pc->c, 12);
- return ide_started;
-}
-static ide_startstop_t idetape_issue_packet_command (ide_drive_t *drive, idetape_pc_t *pc)
+static ide_startstop_t idetape_issue_pc(ide_drive_t *drive,
+ struct ide_atapi_pc *pc)
{
- ide_hwif_t *hwif = drive->hwif;
idetape_tape_t *tape = drive->driver_data;
- atapi_bcount_t bcount;
- int dma_ok = 0;
-#if IDETAPE_DEBUG_BUGS
- if (tape->pc->c[0] == IDETAPE_REQUEST_SENSE_CMD &&
- pc->c[0] == IDETAPE_REQUEST_SENSE_CMD) {
+ if (drive->pc->c[0] == REQUEST_SENSE &&
+ pc->c[0] == REQUEST_SENSE) {
printk(KERN_ERR "ide-tape: possible ide-tape.c bug - "
"Two request sense in serial were issued\n");
}
-#endif /* IDETAPE_DEBUG_BUGS */
- if (tape->failed_pc == NULL && pc->c[0] != IDETAPE_REQUEST_SENSE_CMD)
+ if (tape->failed_pc == NULL && pc->c[0] != REQUEST_SENSE)
tape->failed_pc = pc;
+
/* Set the current packet command */
- tape->pc = pc;
+ drive->pc = pc;
if (pc->retries > IDETAPE_MAX_PC_RETRIES ||
- test_bit(PC_ABORT, &pc->flags)) {
+ (pc->flags & PC_FLAG_ABORT)) {
/*
- * We will "abort" retrying a packet command in case
- * a legitimate error code was received (crossing a
- * filemark, or end of the media, for example).
+ * We will "abort" retrying a packet command in case legitimate
+ * error code was received (crossing a filemark, or end of the
+ * media, for example).
*/
- if (!test_bit(PC_ABORT, &pc->flags)) {
- if (!(pc->c[0] == IDETAPE_TEST_UNIT_READY_CMD &&
+ if (!(pc->flags & PC_FLAG_ABORT)) {
+ if (!(pc->c[0] == TEST_UNIT_READY &&
tape->sense_key == 2 && tape->asc == 4 &&
(tape->ascq == 1 || tape->ascq == 8))) {
printk(KERN_ERR "ide-tape: %s: I/O error, "
pc->error = IDETAPE_ERROR_GENERAL;
}
tape->failed_pc = NULL;
- return pc->callback(drive);
+ drive->pc_callback(drive, 0);
+ return ide_stopped;
}
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 2)
- printk(KERN_INFO "ide-tape: Retry number - %d, cmd = %02X\n", pc->retries, pc->c[0]);
-#endif /* IDETAPE_DEBUG_LOG */
+ debug_log(DBG_SENSE, "Retry #%d, cmd = %02X\n", pc->retries, pc->c[0]);
pc->retries++;
- /* We haven't transferred any data yet */
- pc->actually_transferred = 0;
- pc->current_position = pc->buffer;
- /* Request to transfer the entire buffer at once */
- bcount.all = pc->request_transfer;
-
- if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags)) {
- printk(KERN_WARNING "ide-tape: DMA disabled, "
- "reverting to PIO\n");
- ide_dma_off(drive);
- }
- if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma)
- dma_ok = !hwif->dma_setup(drive);
-
- if (IDE_CONTROL_REG)
- hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
- hwif->OUTB(dma_ok ? 1 : 0, IDE_FEATURE_REG); /* Use PIO/DMA */
- hwif->OUTB(bcount.b.high, IDE_BCOUNTH_REG);
- hwif->OUTB(bcount.b.low, IDE_BCOUNTL_REG);
- hwif->OUTB(drive->select.all, IDE_SELECT_REG);
- if (dma_ok) /* Will begin DMA later */
- set_bit(PC_DMA_IN_PROGRESS, &pc->flags);
- if (test_bit(IDETAPE_DRQ_INTERRUPT, &tape->flags)) {
- ide_set_handler(drive, &idetape_transfer_pc, IDETAPE_WAIT_CMD, NULL);
- hwif->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
- return ide_started;
- } else {
- hwif->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
- return idetape_transfer_pc(drive);
- }
-}
-
-/*
- * General packet command callback function.
- */
-static ide_startstop_t idetape_pc_callback (ide_drive_t *drive)
-{
- idetape_tape_t *tape = drive->driver_data;
-
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 4)
- printk(KERN_INFO "ide-tape: Reached idetape_pc_callback\n");
-#endif /* IDETAPE_DEBUG_LOG */
- idetape_end_request(drive, tape->pc->error ? 0 : 1, 0);
- return ide_stopped;
+ return ide_issue_pc(drive);
}
-/*
- * A mode sense command is used to "sense" tape parameters.
- */
-static void idetape_create_mode_sense_cmd (idetape_pc_t *pc, u8 page_code)
+/* A mode sense command is used to "sense" tape parameters. */
+static void idetape_create_mode_sense_cmd(struct ide_atapi_pc *pc, u8 page_code)
{
- idetape_init_pc(pc);
- pc->c[0] = IDETAPE_MODE_SENSE_CMD;
+ ide_init_pc(pc);
+ pc->c[0] = MODE_SENSE;
if (page_code != IDETAPE_BLOCK_DESCRIPTOR)
- pc->c[1] = 8; /* DBD = 1 - Don't return block descriptors */
+ /* DBD = 1 - Don't return block descriptors */
+ pc->c[1] = 8;
pc->c[2] = page_code;
/*
* Changed pc->c[3] to 0 (255 will at best return unused info).
* and return an error when 255 is used.
*/
pc->c[3] = 0;
- pc->c[4] = 255; /* (We will just discard data in that case) */
+ /* We will just discard data in that case */
+ pc->c[4] = 255;
if (page_code == IDETAPE_BLOCK_DESCRIPTOR)
- pc->request_transfer = 12;
+ pc->req_xfer = 12;
else if (page_code == IDETAPE_CAPABILITIES_PAGE)
- pc->request_transfer = 24;
+ pc->req_xfer = 24;
else
- pc->request_transfer = 50;
- pc->callback = &idetape_pc_callback;
+ pc->req_xfer = 50;
}
-static void calculate_speeds(ide_drive_t *drive)
+static ide_startstop_t idetape_media_access_finished(ide_drive_t *drive)
{
+ ide_hwif_t *hwif = drive->hwif;
idetape_tape_t *tape = drive->driver_data;
- int full = 125, empty = 75;
+ struct ide_atapi_pc *pc = drive->pc;
+ u8 stat;
- if (time_after(jiffies, tape->controlled_pipeline_head_time + 120 * HZ)) {
- tape->controlled_previous_pipeline_head = tape->controlled_last_pipeline_head;
- tape->controlled_previous_head_time = tape->controlled_pipeline_head_time;
- tape->controlled_last_pipeline_head = tape->pipeline_head;
- tape->controlled_pipeline_head_time = jiffies;
- }
- if (time_after(jiffies, tape->controlled_pipeline_head_time + 60 * HZ))
- tape->controlled_pipeline_head_speed = (tape->pipeline_head - tape->controlled_last_pipeline_head) * 32 * HZ / (jiffies - tape->controlled_pipeline_head_time);
- else if (time_after(jiffies, tape->controlled_previous_head_time))
- tape->controlled_pipeline_head_speed = (tape->pipeline_head - tape->controlled_previous_pipeline_head) * 32 * HZ / (jiffies - tape->controlled_previous_head_time);
-
- if (tape->nr_pending_stages < tape->max_stages /*- 1 */) {
- /* -1 for read mode error recovery */
- if (time_after(jiffies, tape->uncontrolled_previous_head_time + 10 * HZ)) {
- tape->uncontrolled_pipeline_head_time = jiffies;
- tape->uncontrolled_pipeline_head_speed = (tape->pipeline_head - tape->uncontrolled_previous_pipeline_head) * 32 * HZ / (jiffies - tape->uncontrolled_previous_head_time);
- }
- } else {
- tape->uncontrolled_previous_head_time = jiffies;
- tape->uncontrolled_previous_pipeline_head = tape->pipeline_head;
- if (time_after(jiffies, tape->uncontrolled_pipeline_head_time + 30 * HZ)) {
- tape->uncontrolled_pipeline_head_time = jiffies;
- }
- }
- tape->pipeline_head_speed = max(tape->uncontrolled_pipeline_head_speed, tape->controlled_pipeline_head_speed);
- if (tape->speed_control == 0) {
- tape->max_insert_speed = 5000;
- } else if (tape->speed_control == 1) {
- if (tape->nr_pending_stages >= tape->max_stages / 2)
- tape->max_insert_speed = tape->pipeline_head_speed +
- (1100 - tape->pipeline_head_speed) * 2 * (tape->nr_pending_stages - tape->max_stages / 2) / tape->max_stages;
- else
- tape->max_insert_speed = 500 +
- (tape->pipeline_head_speed - 500) * 2 * tape->nr_pending_stages / tape->max_stages;
- if (tape->nr_pending_stages >= tape->max_stages * 99 / 100)
- tape->max_insert_speed = 5000;
- } else if (tape->speed_control == 2) {
- tape->max_insert_speed = tape->pipeline_head_speed * empty / 100 +
- (tape->pipeline_head_speed * full / 100 - tape->pipeline_head_speed * empty / 100) * tape->nr_pending_stages / tape->max_stages;
- } else
- tape->max_insert_speed = tape->speed_control;
- tape->max_insert_speed = max(tape->max_insert_speed, 500);
-}
-
-static ide_startstop_t idetape_media_access_finished (ide_drive_t *drive)
-{
- idetape_tape_t *tape = drive->driver_data;
- idetape_pc_t *pc = tape->pc;
- atapi_status_t status;
+ stat = hwif->tp_ops->read_status(hwif);
- status.all = HWIF(drive)->INB(IDE_STATUS_REG);
- if (status.b.dsc) {
- if (status.b.check) {
+ if (stat & ATA_DSC) {
+ if (stat & ATA_ERR) {
/* Error detected */
- if (pc->c[0] != IDETAPE_TEST_UNIT_READY_CMD)
+ if (pc->c[0] != TEST_UNIT_READY)
printk(KERN_ERR "ide-tape: %s: I/O error, ",
tape->name);
/* Retry operation */
- return idetape_retry_pc(drive);
+ ide_retry_pc(drive, tape->disk);
+ return ide_stopped;
}
pc->error = 0;
- if (tape->failed_pc == pc)
- tape->failed_pc = NULL;
} else {
pc->error = IDETAPE_ERROR_GENERAL;
tape->failed_pc = NULL;
}
- return pc->callback(drive);
-}
-
-static ide_startstop_t idetape_rw_callback (ide_drive_t *drive)
-{
- idetape_tape_t *tape = drive->driver_data;
- struct request *rq = HWGROUP(drive)->rq;
- int blocks = tape->pc->actually_transferred / tape->tape_block_size;
-
- tape->avg_size += blocks * tape->tape_block_size;
- tape->insert_size += blocks * tape->tape_block_size;
- if (tape->insert_size > 1024 * 1024)
- tape->measure_insert_time = 1;
- if (tape->measure_insert_time) {
- tape->measure_insert_time = 0;
- tape->insert_time = jiffies;
- tape->insert_size = 0;
- }
- if (time_after(jiffies, tape->insert_time))
- tape->insert_speed = tape->insert_size / 1024 * HZ / (jiffies - tape->insert_time);
- if (time_after_eq(jiffies, tape->avg_time + HZ)) {
- tape->avg_speed = tape->avg_size * HZ / (jiffies - tape->avg_time) / 1024;
- tape->avg_size = 0;
- tape->avg_time = jiffies;
- }
-
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 4)
- printk(KERN_INFO "ide-tape: Reached idetape_rw_callback\n");
-#endif /* IDETAPE_DEBUG_LOG */
-
- tape->first_frame_position += blocks;
- rq->current_nr_sectors -= blocks;
-
- if (!tape->pc->error)
- idetape_end_request(drive, 1, 0);
- else
- idetape_end_request(drive, tape->pc->error, 0);
+ drive->pc_callback(drive, 0);
return ide_stopped;
}
-static void idetape_create_read_cmd(idetape_tape_t *tape, idetape_pc_t *pc, unsigned int length, struct idetape_bh *bh)
+static void ide_tape_create_rw_cmd(idetape_tape_t *tape,
+ struct ide_atapi_pc *pc, struct request *rq,
+ u8 opcode)
{
- idetape_init_pc(pc);
- pc->c[0] = IDETAPE_READ_CMD;
- put_unaligned(htonl(length), (unsigned int *) &pc->c[1]);
- pc->c[1] = 1;
- pc->callback = &idetape_rw_callback;
- pc->bh = bh;
- atomic_set(&bh->b_count, 0);
- pc->buffer = NULL;
- pc->request_transfer = pc->buffer_size = length * tape->tape_block_size;
- if (pc->request_transfer == tape->stage_size)
- set_bit(PC_DMA_RECOMMENDED, &pc->flags);
-}
+ struct idetape_bh *bh = (struct idetape_bh *)rq->special;
+ unsigned int length = rq->current_nr_sectors;
-static void idetape_create_read_buffer_cmd(idetape_tape_t *tape, idetape_pc_t *pc, unsigned int length, struct idetape_bh *bh)
-{
- int size = 32768;
- struct idetape_bh *p = bh;
-
- idetape_init_pc(pc);
- pc->c[0] = IDETAPE_READ_BUFFER_CMD;
- pc->c[1] = IDETAPE_RETRIEVE_FAULTY_BLOCK;
- pc->c[7] = size >> 8;
- pc->c[8] = size & 0xff;
- pc->callback = &idetape_pc_callback;
+ ide_init_pc(pc);
+ put_unaligned(cpu_to_be32(length), (unsigned int *) &pc->c[1]);
+ pc->c[1] = 1;
pc->bh = bh;
- atomic_set(&bh->b_count, 0);
- pc->buffer = NULL;
- while (p) {
- atomic_set(&p->b_count, 0);
- p = p->b_reqnext;
+ pc->buf = NULL;
+ pc->buf_size = length * tape->blk_size;
+ pc->req_xfer = pc->buf_size;
+ if (pc->req_xfer == tape->buffer_size)
+ pc->flags |= PC_FLAG_DMA_OK;
+
+ if (opcode == READ_6) {
+ pc->c[0] = READ_6;
+ atomic_set(&bh->b_count, 0);
+ } else if (opcode == WRITE_6) {
+ pc->c[0] = WRITE_6;
+ pc->flags |= PC_FLAG_WRITING;
+ pc->b_data = bh->b_data;
+ pc->b_count = atomic_read(&bh->b_count);
}
- pc->request_transfer = pc->buffer_size = size;
-}
-static void idetape_create_write_cmd(idetape_tape_t *tape, idetape_pc_t *pc, unsigned int length, struct idetape_bh *bh)
-{
- idetape_init_pc(pc);
- pc->c[0] = IDETAPE_WRITE_CMD;
- put_unaligned(htonl(length), (unsigned int *) &pc->c[1]);
- pc->c[1] = 1;
- pc->callback = &idetape_rw_callback;
- set_bit(PC_WRITING, &pc->flags);
- pc->bh = bh;
- pc->b_data = bh->b_data;
- pc->b_count = atomic_read(&bh->b_count);
- pc->buffer = NULL;
- pc->request_transfer = pc->buffer_size = length * tape->tape_block_size;
- if (pc->request_transfer == tape->stage_size)
- set_bit(PC_DMA_RECOMMENDED, &pc->flags);
+ memcpy(rq->cmd, pc->c, 12);
}
-/*
- * idetape_do_request is our request handling function.
- */
static ide_startstop_t idetape_do_request(ide_drive_t *drive,
struct request *rq, sector_t block)
{
+ ide_hwif_t *hwif = drive->hwif;
idetape_tape_t *tape = drive->driver_data;
- idetape_pc_t *pc = NULL;
+ struct ide_atapi_pc *pc = NULL;
struct request *postponed_rq = tape->postponed_rq;
- atapi_status_t status;
+ u8 stat;
-#if IDETAPE_DEBUG_LOG
-#if 0
- if (tape->debug_level >= 5)
- printk(KERN_INFO "ide-tape: %d, "
- "dev: %s, cmd: %ld, errors: %d\n",
- rq->rq_disk->disk_name, rq->cmd[0], rq->errors);
-#endif
- if (tape->debug_level >= 2)
- printk(KERN_INFO "ide-tape: sector: %ld, "
- "nr_sectors: %ld, current_nr_sectors: %d\n",
- rq->sector, rq->nr_sectors, rq->current_nr_sectors);
-#endif /* IDETAPE_DEBUG_LOG */
+ debug_log(DBG_SENSE, "sector: %llu, nr_sectors: %lu,"
+ " current_nr_sectors: %u\n",
+ (unsigned long long)rq->sector, rq->nr_sectors,
+ rq->current_nr_sectors);
if (!blk_special_request(rq)) {
- /*
- * We do not support buffer cache originated requests.
- */
+ /* We do not support buffer cache originated requests. */
printk(KERN_NOTICE "ide-tape: %s: Unsupported request in "
"request queue (%d)\n", drive->name, rq->cmd_type);
ide_end_request(drive, 0, 0);
return ide_stopped;
}
- /*
- * Retry a failed packet command
- */
- if (tape->failed_pc != NULL &&
- tape->pc->c[0] == IDETAPE_REQUEST_SENSE_CMD) {
- return idetape_issue_packet_command(drive, tape->failed_pc);
+ /* Retry a failed packet command */
+ if (tape->failed_pc && drive->pc->c[0] == REQUEST_SENSE) {
+ pc = tape->failed_pc;
+ goto out;
}
-#if IDETAPE_DEBUG_BUGS
+
if (postponed_rq != NULL)
if (rq != postponed_rq) {
printk(KERN_ERR "ide-tape: ide-tape.c bug - "
idetape_end_request(drive, 0, 0);
return ide_stopped;
}
-#endif /* IDETAPE_DEBUG_BUGS */
tape->postponed_rq = NULL;
* If the tape is still busy, postpone our request and service
* the other device meanwhile.
*/
- status.all = HWIF(drive)->INB(IDE_STATUS_REG);
+ stat = hwif->tp_ops->read_status(hwif);
- if (!drive->dsc_overlap && !(rq->cmd[0] & REQ_IDETAPE_PC2))
- set_bit(IDETAPE_IGNORE_DSC, &tape->flags);
+ if ((drive->dev_flags & IDE_DFLAG_DSC_OVERLAP) == 0 &&
+ (rq->cmd[13] & REQ_IDETAPE_PC2) == 0)
+ set_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags);
- if (drive->post_reset == 1) {
- set_bit(IDETAPE_IGNORE_DSC, &tape->flags);
- drive->post_reset = 0;
+ if (drive->dev_flags & IDE_DFLAG_POST_RESET) {
+ set_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags);
+ drive->dev_flags &= ~IDE_DFLAG_POST_RESET;
}
- if (tape->tape_still_time > 100 && tape->tape_still_time < 200)
- tape->measure_insert_time = 1;
- if (time_after(jiffies, tape->insert_time))
- tape->insert_speed = tape->insert_size / 1024 * HZ / (jiffies - tape->insert_time);
- calculate_speeds(drive);
- if (!test_and_clear_bit(IDETAPE_IGNORE_DSC, &tape->flags) &&
- !status.b.dsc) {
+ if (!test_and_clear_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags) &&
+ (stat & ATA_DSC) == 0) {
if (postponed_rq == NULL) {
tape->dsc_polling_start = jiffies;
- tape->dsc_polling_frequency = tape->best_dsc_rw_frequency;
+ tape->dsc_poll_freq = tape->best_dsc_rw_freq;
tape->dsc_timeout = jiffies + IDETAPE_DSC_RW_TIMEOUT;
} else if (time_after(jiffies, tape->dsc_timeout)) {
printk(KERN_ERR "ide-tape: %s: DSC timeout\n",
tape->name);
- if (rq->cmd[0] & REQ_IDETAPE_PC2) {
+ if (rq->cmd[13] & REQ_IDETAPE_PC2) {
idetape_media_access_finished(drive);
return ide_stopped;
} else {
return ide_do_reset(drive);
}
- } else if (time_after(jiffies, tape->dsc_polling_start + IDETAPE_DSC_MA_THRESHOLD))
- tape->dsc_polling_frequency = IDETAPE_DSC_MA_SLOW;
+ } else if (time_after(jiffies,
+ tape->dsc_polling_start +
+ IDETAPE_DSC_MA_THRESHOLD))
+ tape->dsc_poll_freq = IDETAPE_DSC_MA_SLOW;
idetape_postpone_request(drive);
return ide_stopped;
}
- if (rq->cmd[0] & REQ_IDETAPE_READ) {
- tape->buffer_head++;
-#if USE_IOTRACE
- IO_trace(IO_IDETAPE_FIFO, tape->pipeline_head, tape->buffer_head, tape->tape_head, tape->minor);
-#endif
- tape->postpone_cnt = 0;
- pc = idetape_next_pc_storage(drive);
- idetape_create_read_cmd(tape, pc, rq->current_nr_sectors, (struct idetape_bh *)rq->special);
- goto out;
- }
- if (rq->cmd[0] & REQ_IDETAPE_WRITE) {
- tape->buffer_head++;
-#if USE_IOTRACE
- IO_trace(IO_IDETAPE_FIFO, tape->pipeline_head, tape->buffer_head, tape->tape_head, tape->minor);
-#endif
- tape->postpone_cnt = 0;
- pc = idetape_next_pc_storage(drive);
- idetape_create_write_cmd(tape, pc, rq->current_nr_sectors, (struct idetape_bh *)rq->special);
+ if (rq->cmd[13] & REQ_IDETAPE_READ) {
+ pc = &tape->queued_pc;
+ ide_tape_create_rw_cmd(tape, pc, rq, READ_6);
goto out;
}
- if (rq->cmd[0] & REQ_IDETAPE_READ_BUFFER) {
- tape->postpone_cnt = 0;
- pc = idetape_next_pc_storage(drive);
- idetape_create_read_buffer_cmd(tape, pc, rq->current_nr_sectors, (struct idetape_bh *)rq->special);
+ if (rq->cmd[13] & REQ_IDETAPE_WRITE) {
+ pc = &tape->queued_pc;
+ ide_tape_create_rw_cmd(tape, pc, rq, WRITE_6);
goto out;
}
- if (rq->cmd[0] & REQ_IDETAPE_PC1) {
- pc = (idetape_pc_t *) rq->buffer;
- rq->cmd[0] &= ~(REQ_IDETAPE_PC1);
- rq->cmd[0] |= REQ_IDETAPE_PC2;
+ if (rq->cmd[13] & REQ_IDETAPE_PC1) {
+ pc = (struct ide_atapi_pc *) rq->buffer;
+ rq->cmd[13] &= ~(REQ_IDETAPE_PC1);
+ rq->cmd[13] |= REQ_IDETAPE_PC2;
goto out;
}
- if (rq->cmd[0] & REQ_IDETAPE_PC2) {
+ if (rq->cmd[13] & REQ_IDETAPE_PC2) {
idetape_media_access_finished(drive);
return ide_stopped;
}
BUG();
-out:
- return idetape_issue_packet_command(drive, pc);
-}
-/*
- * Pipeline related functions
- */
-static inline int idetape_pipeline_active (idetape_tape_t *tape)
-{
- int rc1, rc2;
-
- rc1 = test_bit(IDETAPE_PIPELINE_ACTIVE, &tape->flags);
- rc2 = (tape->active_data_request != NULL);
- return rc1;
+out:
+ return idetape_issue_pc(drive, pc);
}
/*
- * idetape_kmalloc_stage uses __get_free_page to allocate a pipeline
- * stage, along with all the necessary small buffers which together make
- * a buffer of size tape->stage_size (or a bit more). We attempt to
- * combine sequential pages as much as possible.
- *
- * Returns a pointer to the new allocated stage, or NULL if we
- * can't (or don't want to) allocate a stage.
+ * The function below uses __get_free_pages to allocate a data buffer of size
+ * tape->buffer_size (or a bit more). We attempt to combine sequential pages as
+ * much as possible.
*
- * Pipeline stages are optional and are used to increase performance.
- * If we can't allocate them, we'll manage without them.
+ * It returns a pointer to the newly allocated buffer, or NULL in case of
+ * failure.
*/
-static idetape_stage_t *__idetape_kmalloc_stage (idetape_tape_t *tape, int full, int clear)
+static struct idetape_bh *ide_tape_kmalloc_buffer(idetape_tape_t *tape,
+ int full, int clear)
{
- idetape_stage_t *stage;
- struct idetape_bh *prev_bh, *bh;
- int pages = tape->pages_per_stage;
+ struct idetape_bh *prev_bh, *bh, *merge_bh;
+ int pages = tape->pages_per_buffer;
+ unsigned int order, b_allocd;
char *b_data = NULL;
- if ((stage = kmalloc(sizeof (idetape_stage_t),GFP_KERNEL)) == NULL)
- return NULL;
- stage->next = NULL;
-
- bh = stage->bh = kmalloc(sizeof(struct idetape_bh), GFP_KERNEL);
+ merge_bh = kmalloc(sizeof(struct idetape_bh), GFP_KERNEL);
+ bh = merge_bh;
if (bh == NULL)
goto abort;
- bh->b_reqnext = NULL;
- if ((bh->b_data = (char *) __get_free_page (GFP_KERNEL)) == NULL)
+
+ order = fls(pages) - 1;
+ bh->b_data = (char *) __get_free_pages(GFP_KERNEL, order);
+ if (!bh->b_data)
goto abort;
+ b_allocd = (1 << order) * PAGE_SIZE;
+ pages &= (order-1);
+
if (clear)
- memset(bh->b_data, 0, PAGE_SIZE);
- bh->b_size = PAGE_SIZE;
+ memset(bh->b_data, 0, b_allocd);
+ bh->b_reqnext = NULL;
+ bh->b_size = b_allocd;
atomic_set(&bh->b_count, full ? bh->b_size : 0);
- while (--pages) {
- if ((b_data = (char *) __get_free_page (GFP_KERNEL)) == NULL)
+ while (pages) {
+ order = fls(pages) - 1;
+ b_data = (char *) __get_free_pages(GFP_KERNEL, order);
+ if (!b_data)
goto abort;
+ b_allocd = (1 << order) * PAGE_SIZE;
+
if (clear)
- memset(b_data, 0, PAGE_SIZE);
- if (bh->b_data == b_data + PAGE_SIZE) {
- bh->b_size += PAGE_SIZE;
- bh->b_data -= PAGE_SIZE;
+ memset(b_data, 0, b_allocd);
+
+ /* newly allocated page frames below buffer header or ...*/
+ if (bh->b_data == b_data + b_allocd) {
+ bh->b_size += b_allocd;
+ bh->b_data -= b_allocd;
if (full)
- atomic_add(PAGE_SIZE, &bh->b_count);
+ atomic_add(b_allocd, &bh->b_count);
continue;
}
+ /* they are above the header */
if (b_data == bh->b_data + bh->b_size) {
- bh->b_size += PAGE_SIZE;
+ bh->b_size += b_allocd;
if (full)
- atomic_add(PAGE_SIZE, &bh->b_count);
+ atomic_add(b_allocd, &bh->b_count);
continue;
}
prev_bh = bh;
- if ((bh = kmalloc(sizeof(struct idetape_bh), GFP_KERNEL)) == NULL) {
- free_page((unsigned long) b_data);
+ bh = kmalloc(sizeof(struct idetape_bh), GFP_KERNEL);
+ if (!bh) {
+ free_pages((unsigned long) b_data, order);
goto abort;
}
bh->b_reqnext = NULL;
bh->b_data = b_data;
- bh->b_size = PAGE_SIZE;
+ bh->b_size = b_allocd;
atomic_set(&bh->b_count, full ? bh->b_size : 0);
prev_bh->b_reqnext = bh;
+
+ pages &= (order-1);
}
+
bh->b_size -= tape->excess_bh_size;
if (full)
atomic_sub(tape->excess_bh_size, &bh->b_count);
- return stage;
+ return merge_bh;
abort:
- __idetape_kfree_stage(stage);
+ ide_tape_kfree_buffer(tape);
return NULL;
}
-static idetape_stage_t *idetape_kmalloc_stage (idetape_tape_t *tape)
-{
- idetape_stage_t *cache_stage = tape->cache_stage;
-
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 4)
- printk(KERN_INFO "ide-tape: Reached idetape_kmalloc_stage\n");
-#endif /* IDETAPE_DEBUG_LOG */
-
- if (tape->nr_stages >= tape->max_stages)
- return NULL;
- if (cache_stage != NULL) {
- tape->cache_stage = NULL;
- return cache_stage;
- }
- return __idetape_kmalloc_stage(tape, 0, 0);
-}
-
-static int idetape_copy_stage_from_user (idetape_tape_t *tape, idetape_stage_t *stage, const char __user *buf, int n)
+static int idetape_copy_stage_from_user(idetape_tape_t *tape,
+ const char __user *buf, int n)
{
struct idetape_bh *bh = tape->bh;
int count;
int ret = 0;
while (n) {
-#if IDETAPE_DEBUG_BUGS
if (bh == NULL) {
- printk(KERN_ERR "ide-tape: bh == NULL in "
- "idetape_copy_stage_from_user\n");
+ printk(KERN_ERR "ide-tape: bh == NULL in %s\n",
+ __func__);
return 1;
}
-#endif /* IDETAPE_DEBUG_BUGS */
- count = min((unsigned int)(bh->b_size - atomic_read(&bh->b_count)), (unsigned int)n);
- if (copy_from_user(bh->b_data + atomic_read(&bh->b_count), buf, count))
+ count = min((unsigned int)
+ (bh->b_size - atomic_read(&bh->b_count)),
+ (unsigned int)n);
+ if (copy_from_user(bh->b_data + atomic_read(&bh->b_count), buf,
+ count))
ret = 1;
n -= count;
atomic_add(count, &bh->b_count);
return ret;
}
-static int idetape_copy_stage_to_user (idetape_tape_t *tape, char __user *buf, idetape_stage_t *stage, int n)
+static int idetape_copy_stage_to_user(idetape_tape_t *tape, char __user *buf,
+ int n)
{
struct idetape_bh *bh = tape->bh;
int count;
int ret = 0;
while (n) {
-#if IDETAPE_DEBUG_BUGS
if (bh == NULL) {
- printk(KERN_ERR "ide-tape: bh == NULL in "
- "idetape_copy_stage_to_user\n");
+ printk(KERN_ERR "ide-tape: bh == NULL in %s\n",
+ __func__);
return 1;
}
-#endif /* IDETAPE_DEBUG_BUGS */
count = min(tape->b_count, n);
if (copy_to_user(buf, tape->b_data, count))
ret = 1;
tape->b_count -= count;
buf += count;
if (!tape->b_count) {
- tape->bh = bh = bh->b_reqnext;
+ bh = bh->b_reqnext;
+ tape->bh = bh;
if (bh) {
tape->b_data = bh->b_data;
tape->b_count = atomic_read(&bh->b_count);
return ret;
}
-static void idetape_init_merge_stage (idetape_tape_t *tape)
+static void idetape_init_merge_buffer(idetape_tape_t *tape)
{
- struct idetape_bh *bh = tape->merge_stage->bh;
-
- tape->bh = bh;
- if (tape->chrdev_direction == idetape_direction_write)
+ struct idetape_bh *bh = tape->merge_bh;
+ tape->bh = tape->merge_bh;
+
+ if (tape->chrdev_dir == IDETAPE_DIR_WRITE)
atomic_set(&bh->b_count, 0);
else {
tape->b_data = bh->b_data;
}
}
-static void idetape_switch_buffers (idetape_tape_t *tape, idetape_stage_t *stage)
-{
- struct idetape_bh *tmp;
-
- tmp = stage->bh;
- stage->bh = tape->merge_stage->bh;
- tape->merge_stage->bh = tmp;
- idetape_init_merge_stage(tape);
-}
-
-/*
- * idetape_add_stage_tail adds a new stage at the end of the pipeline.
- */
-static void idetape_add_stage_tail (ide_drive_t *drive,idetape_stage_t *stage)
-{
- idetape_tape_t *tape = drive->driver_data;
- unsigned long flags;
-
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 4)
- printk (KERN_INFO "ide-tape: Reached idetape_add_stage_tail\n");
-#endif /* IDETAPE_DEBUG_LOG */
- spin_lock_irqsave(&tape->spinlock, flags);
- stage->next = NULL;
- if (tape->last_stage != NULL)
- tape->last_stage->next=stage;
- else
- tape->first_stage = tape->next_stage=stage;
- tape->last_stage = stage;
- if (tape->next_stage == NULL)
- tape->next_stage = tape->last_stage;
- tape->nr_stages++;
- tape->nr_pending_stages++;
- spin_unlock_irqrestore(&tape->spinlock, flags);
-}
-
-/*
- * idetape_wait_for_request installs a completion in a pending request
- * and sleeps until it is serviced.
- *
- * The caller should ensure that the request will not be serviced
- * before we install the completion (usually by disabling interrupts).
- */
-static void idetape_wait_for_request (ide_drive_t *drive, struct request *rq)
-{
- DECLARE_COMPLETION_ONSTACK(wait);
- idetape_tape_t *tape = drive->driver_data;
-
-#if IDETAPE_DEBUG_BUGS
- if (rq == NULL || !blk_special_request(rq)) {
- printk (KERN_ERR "ide-tape: bug: Trying to sleep on non-valid request\n");
- return;
- }
-#endif /* IDETAPE_DEBUG_BUGS */
- rq->end_io_data = &wait;
- rq->end_io = blk_end_sync_rq;
- spin_unlock_irq(&tape->spinlock);
- wait_for_completion(&wait);
- /* The stage and its struct request have been deallocated */
- spin_lock_irq(&tape->spinlock);
-}
-
-static ide_startstop_t idetape_read_position_callback (ide_drive_t *drive)
-{
- idetape_tape_t *tape = drive->driver_data;
- idetape_read_position_result_t *result;
-
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 4)
- printk(KERN_INFO "ide-tape: Reached idetape_read_position_callback\n");
-#endif /* IDETAPE_DEBUG_LOG */
-
- if (!tape->pc->error) {
- result = (idetape_read_position_result_t *) tape->pc->buffer;
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 2)
- printk(KERN_INFO "ide-tape: BOP - %s\n",result->bop ? "Yes":"No");
- if (tape->debug_level >= 2)
- printk(KERN_INFO "ide-tape: EOP - %s\n",result->eop ? "Yes":"No");
-#endif /* IDETAPE_DEBUG_LOG */
- if (result->bpu) {
- printk(KERN_INFO "ide-tape: Block location is unknown to the tape\n");
- clear_bit(IDETAPE_ADDRESS_VALID, &tape->flags);
- idetape_end_request(drive, 0, 0);
- } else {
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 2)
- printk(KERN_INFO "ide-tape: Block Location - %u\n", ntohl(result->first_block));
-#endif /* IDETAPE_DEBUG_LOG */
- tape->partition = result->partition;
- tape->first_frame_position = ntohl(result->first_block);
- tape->last_frame_position = ntohl(result->last_block);
- tape->blocks_in_buffer = result->blocks_in_buffer[2];
- set_bit(IDETAPE_ADDRESS_VALID, &tape->flags);
- idetape_end_request(drive, 1, 0);
- }
- } else {
- idetape_end_request(drive, 0, 0);
- }
- return ide_stopped;
-}
-
/*
- * idetape_create_write_filemark_cmd will:
- *
- * 1. Write a filemark if write_filemark=1.
- * 2. Flush the device buffers without writing a filemark
- * if write_filemark=0.
- *
+ * Write a filemark if write_filemark=1. Flush the device buffers without
+ * writing a filemark otherwise.
*/
-static void idetape_create_write_filemark_cmd (ide_drive_t *drive, idetape_pc_t *pc,int write_filemark)
+static void idetape_create_write_filemark_cmd(ide_drive_t *drive,
+ struct ide_atapi_pc *pc, int write_filemark)
{
- idetape_init_pc(pc);
- pc->c[0] = IDETAPE_WRITE_FILEMARK_CMD;
+ ide_init_pc(pc);
+ pc->c[0] = WRITE_FILEMARKS;
pc->c[4] = write_filemark;
- set_bit(PC_WAIT_FOR_DSC, &pc->flags);
- pc->callback = &idetape_pc_callback;
-}
-
-static void idetape_create_test_unit_ready_cmd(idetape_pc_t *pc)
-{
- idetape_init_pc(pc);
- pc->c[0] = IDETAPE_TEST_UNIT_READY_CMD;
- pc->callback = &idetape_pc_callback;
-}
-
-/*
- * idetape_queue_pc_tail is based on the following functions:
- *
- * ide_do_drive_cmd from ide.c
- * cdrom_queue_request and cdrom_queue_packet_command from ide-cd.c
- *
- * We add a special packet command request to the tail of the request
- * queue, and wait for it to be serviced.
- *
- * This is not to be called from within the request handling part
- * of the driver ! We allocate here data in the stack, and it is valid
- * until the request is finished. This is not the case for the bottom
- * part of the driver, where we are always leaving the functions to wait
- * for an interrupt or a timer event.
- *
- * From the bottom part of the driver, we should allocate safe memory
- * using idetape_next_pc_storage and idetape_next_rq_storage, and add
- * the request to the request list without waiting for it to be serviced !
- * In that case, we usually use idetape_queue_pc_head.
- */
-static int __idetape_queue_pc_tail (ide_drive_t *drive, idetape_pc_t *pc)
-{
- struct ide_tape_obj *tape = drive->driver_data;
- struct request rq;
-
- idetape_init_rq(&rq, REQ_IDETAPE_PC1);
- rq.buffer = (char *) pc;
- rq.rq_disk = tape->disk;
- return ide_do_drive_cmd(drive, &rq, ide_wait);
-}
-
-static void idetape_create_load_unload_cmd (ide_drive_t *drive, idetape_pc_t *pc,int cmd)
-{
- idetape_init_pc(pc);
- pc->c[0] = IDETAPE_LOAD_UNLOAD_CMD;
- pc->c[4] = cmd;
- set_bit(PC_WAIT_FOR_DSC, &pc->flags);
- pc->callback = &idetape_pc_callback;
+ pc->flags |= PC_FLAG_WAIT_FOR_DSC;
}
static int idetape_wait_ready(ide_drive_t *drive, unsigned long timeout)
{
idetape_tape_t *tape = drive->driver_data;
- idetape_pc_t pc;
+ struct gendisk *disk = tape->disk;
int load_attempted = 0;
- /*
- * Wait for the tape to become ready
- */
- set_bit(IDETAPE_MEDIUM_PRESENT, &tape->flags);
+ /* Wait for the tape to become ready */
+ set_bit(IDE_AFLAG_MEDIUM_PRESENT, &drive->atapi_flags);
timeout += jiffies;
while (time_before(jiffies, timeout)) {
- idetape_create_test_unit_ready_cmd(&pc);
- if (!__idetape_queue_pc_tail(drive, &pc))
+ if (ide_do_test_unit_ready(drive, disk) == 0)
return 0;
if ((tape->sense_key == 2 && tape->asc == 4 && tape->ascq == 2)
- || (tape->asc == 0x3A)) { /* no media */
+ || (tape->asc == 0x3A)) {
+ /* no media */
if (load_attempted)
return -ENOMEDIUM;
- idetape_create_load_unload_cmd(drive, &pc, IDETAPE_LU_LOAD_MASK);
- __idetape_queue_pc_tail(drive, &pc);
+ ide_do_start_stop(drive, disk, IDETAPE_LU_LOAD_MASK);
load_attempted = 1;
/* not about to be ready */
} else if (!(tape->sense_key == 2 && tape->asc == 4 &&
return -EIO;
}
-static int idetape_queue_pc_tail (ide_drive_t *drive,idetape_pc_t *pc)
+static int idetape_flush_tape_buffers(ide_drive_t *drive)
{
- return __idetape_queue_pc_tail(drive, pc);
-}
-
-static int idetape_flush_tape_buffers (ide_drive_t *drive)
-{
- idetape_pc_t pc;
+ struct ide_tape_obj *tape = drive->driver_data;
+ struct ide_atapi_pc pc;
int rc;
idetape_create_write_filemark_cmd(drive, &pc, 0);
- if ((rc = idetape_queue_pc_tail(drive, &pc)))
+ rc = ide_queue_pc_tail(drive, tape->disk, &pc);
+ if (rc)
return rc;
idetape_wait_ready(drive, 60 * 5 * HZ);
return 0;
}
-static void idetape_create_read_position_cmd (idetape_pc_t *pc)
+static void idetape_create_read_position_cmd(struct ide_atapi_pc *pc)
{
- idetape_init_pc(pc);
- pc->c[0] = IDETAPE_READ_POSITION_CMD;
- pc->request_transfer = 20;
- pc->callback = &idetape_read_position_callback;
+ ide_init_pc(pc);
+ pc->c[0] = READ_POSITION;
+ pc->req_xfer = 20;
}
-static int idetape_read_position (ide_drive_t *drive)
+static int idetape_read_position(ide_drive_t *drive)
{
idetape_tape_t *tape = drive->driver_data;
- idetape_pc_t pc;
+ struct ide_atapi_pc pc;
int position;
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 4)
- printk(KERN_INFO "ide-tape: Reached idetape_read_position\n");
-#endif /* IDETAPE_DEBUG_LOG */
+ debug_log(DBG_PROCS, "Enter %s\n", __func__);
idetape_create_read_position_cmd(&pc);
- if (idetape_queue_pc_tail(drive, &pc))
+ if (ide_queue_pc_tail(drive, tape->disk, &pc))
return -1;
- position = tape->first_frame_position;
+ position = tape->first_frame;
return position;
}
-static void idetape_create_locate_cmd (ide_drive_t *drive, idetape_pc_t *pc, unsigned int block, u8 partition, int skip)
+static void idetape_create_locate_cmd(ide_drive_t *drive,
+ struct ide_atapi_pc *pc,
+ unsigned int block, u8 partition, int skip)
{
- idetape_init_pc(pc);
- pc->c[0] = IDETAPE_LOCATE_CMD;
+ ide_init_pc(pc);
+ pc->c[0] = POSITION_TO_ELEMENT;
pc->c[1] = 2;
- put_unaligned(htonl(block), (unsigned int *) &pc->c[3]);
+ put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[3]);
pc->c[8] = partition;
- set_bit(PC_WAIT_FOR_DSC, &pc->flags);
- pc->callback = &idetape_pc_callback;
-}
-
-static int idetape_create_prevent_cmd (ide_drive_t *drive, idetape_pc_t *pc, int prevent)
-{
- idetape_tape_t *tape = drive->driver_data;
-
- if (!tape->capabilities.lock)
- return 0;
-
- idetape_init_pc(pc);
- pc->c[0] = IDETAPE_PREVENT_CMD;
- pc->c[4] = prevent;
- pc->callback = &idetape_pc_callback;
- return 1;
+ pc->flags |= PC_FLAG_WAIT_FOR_DSC;
}
-static int __idetape_discard_read_pipeline (ide_drive_t *drive)
+static void __ide_tape_discard_merge_buffer(ide_drive_t *drive)
{
idetape_tape_t *tape = drive->driver_data;
- unsigned long flags;
- int cnt;
- if (tape->chrdev_direction != idetape_direction_read)
- return 0;
+ if (tape->chrdev_dir != IDETAPE_DIR_READ)
+ return;
- /* Remove merge stage. */
- cnt = tape->merge_stage_size / tape->tape_block_size;
- if (test_and_clear_bit(IDETAPE_FILEMARK, &tape->flags))
- ++cnt; /* Filemarks count as 1 sector */
- tape->merge_stage_size = 0;
- if (tape->merge_stage != NULL) {
- __idetape_kfree_stage(tape->merge_stage);
- tape->merge_stage = NULL;
+ clear_bit(IDE_AFLAG_FILEMARK, &drive->atapi_flags);
+ tape->merge_bh_size = 0;
+ if (tape->merge_bh != NULL) {
+ ide_tape_kfree_buffer(tape);
+ tape->merge_bh = NULL;
}
- /* Clear pipeline flags. */
- clear_bit(IDETAPE_PIPELINE_ERROR, &tape->flags);
- tape->chrdev_direction = idetape_direction_none;
-
- /* Remove pipeline stages. */
- if (tape->first_stage == NULL)
- return 0;
-
- spin_lock_irqsave(&tape->spinlock, flags);
- tape->next_stage = NULL;
- if (idetape_pipeline_active(tape))
- idetape_wait_for_request(drive, tape->active_data_request);
- spin_unlock_irqrestore(&tape->spinlock, flags);
-
- while (tape->first_stage != NULL) {
- struct request *rq_ptr = &tape->first_stage->rq;
-
- cnt += rq_ptr->nr_sectors - rq_ptr->current_nr_sectors;
- if (rq_ptr->errors == IDETAPE_ERROR_FILEMARK)
- ++cnt;
- idetape_remove_stage_head(drive);
- }
- tape->nr_pending_stages = 0;
- tape->max_stages = tape->min_pipeline;
- return cnt;
+ tape->chrdev_dir = IDETAPE_DIR_NONE;
}
/*
- * idetape_position_tape positions the tape to the requested block
- * using the LOCATE packet command. A READ POSITION command is then
- * issued to check where we are positioned.
- *
- * Like all higher level operations, we queue the commands at the tail
- * of the request queue and wait for their completion.
- *
+ * Position the tape to the requested block using the LOCATE packet command.
+ * A READ POSITION command is then issued to check where we are positioned. Like
+ * all higher level operations, we queue the commands at the tail of the request
+ * queue and wait for their completion.
*/
-static int idetape_position_tape (ide_drive_t *drive, unsigned int block, u8 partition, int skip)
+static int idetape_position_tape(ide_drive_t *drive, unsigned int block,
+ u8 partition, int skip)
{
idetape_tape_t *tape = drive->driver_data;
+ struct gendisk *disk = tape->disk;
int retval;
- idetape_pc_t pc;
+ struct ide_atapi_pc pc;
- if (tape->chrdev_direction == idetape_direction_read)
- __idetape_discard_read_pipeline(drive);
+ if (tape->chrdev_dir == IDETAPE_DIR_READ)
+ __ide_tape_discard_merge_buffer(drive);
idetape_wait_ready(drive, 60 * 5 * HZ);
idetape_create_locate_cmd(drive, &pc, block, partition, skip);
- retval = idetape_queue_pc_tail(drive, &pc);
+ retval = ide_queue_pc_tail(drive, disk, &pc);
if (retval)
return (retval);
idetape_create_read_position_cmd(&pc);
- return (idetape_queue_pc_tail(drive, &pc));
+ return ide_queue_pc_tail(drive, disk, &pc);
}
-static void idetape_discard_read_pipeline (ide_drive_t *drive, int restore_position)
+static void ide_tape_discard_merge_buffer(ide_drive_t *drive,
+ int restore_position)
{
idetape_tape_t *tape = drive->driver_data;
- int cnt;
int seek, position;
- cnt = __idetape_discard_read_pipeline(drive);
+ __ide_tape_discard_merge_buffer(drive);
if (restore_position) {
position = idetape_read_position(drive);
- seek = position > cnt ? position - cnt : 0;
+ seek = position > 0 ? position : 0;
if (idetape_position_tape(drive, seek, 0, 0)) {
- printk(KERN_INFO "ide-tape: %s: position_tape failed in discard_pipeline()\n", tape->name);
+ printk(KERN_INFO "ide-tape: %s: position_tape failed in"
+ " %s\n", tape->name, __func__);
return;
}
}
}
/*
- * idetape_queue_rw_tail generates a read/write request for the block
- * device interface and wait for it to be serviced.
+ * Generate a read/write request for the block device interface and wait for it
+ * to be serviced.
*/
-static int idetape_queue_rw_tail(ide_drive_t *drive, int cmd, int blocks, struct idetape_bh *bh)
+static int idetape_queue_rw_tail(ide_drive_t *drive, int cmd, int blocks,
+ struct idetape_bh *bh)
{
idetape_tape_t *tape = drive->driver_data;
- struct request rq;
+ struct request *rq;
+ int ret, errors;
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 2)
- printk(KERN_INFO "ide-tape: idetape_queue_rw_tail: cmd=%d\n",cmd);
-#endif /* IDETAPE_DEBUG_LOG */
-#if IDETAPE_DEBUG_BUGS
- if (idetape_pipeline_active(tape)) {
- printk(KERN_ERR "ide-tape: bug: the pipeline is active in idetape_queue_rw_tail\n");
- return (0);
- }
-#endif /* IDETAPE_DEBUG_BUGS */
+ debug_log(DBG_SENSE, "%s: cmd=%d\n", __func__, cmd);
+
+ rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
+ rq->cmd_type = REQ_TYPE_SPECIAL;
+ rq->cmd[13] = cmd;
+ rq->rq_disk = tape->disk;
+ rq->special = (void *)bh;
+ rq->sector = tape->first_frame;
+ rq->nr_sectors = blocks;
+ rq->current_nr_sectors = blocks;
+ blk_execute_rq(drive->queue, tape->disk, rq, 0);
- idetape_init_rq(&rq, cmd);
- rq.rq_disk = tape->disk;
- rq.special = (void *)bh;
- rq.sector = tape->first_frame_position;
- rq.nr_sectors = rq.current_nr_sectors = blocks;
- (void) ide_do_drive_cmd(drive, &rq, ide_wait);
+ errors = rq->errors;
+ ret = tape->blk_size * (blocks - rq->current_nr_sectors);
+ blk_put_request(rq);
if ((cmd & (REQ_IDETAPE_READ | REQ_IDETAPE_WRITE)) == 0)
return 0;
- if (tape->merge_stage)
- idetape_init_merge_stage(tape);
- if (rq.errors == IDETAPE_ERROR_GENERAL)
+ if (tape->merge_bh)
+ idetape_init_merge_buffer(tape);
+ if (errors == IDETAPE_ERROR_GENERAL)
return -EIO;
- return (tape->tape_block_size * (blocks-rq.current_nr_sectors));
-}
-
-/*
- * idetape_insert_pipeline_into_queue is used to start servicing the
- * pipeline stages, starting from tape->next_stage.
- */
-static void idetape_insert_pipeline_into_queue (ide_drive_t *drive)
-{
- idetape_tape_t *tape = drive->driver_data;
-
- if (tape->next_stage == NULL)
- return;
- if (!idetape_pipeline_active(tape)) {
- set_bit(IDETAPE_PIPELINE_ACTIVE, &tape->flags);
- idetape_active_next_stage(drive);
- (void) ide_do_drive_cmd(drive, tape->active_data_request, ide_end);
- }
-}
-
-static void idetape_create_inquiry_cmd (idetape_pc_t *pc)
-{
- idetape_init_pc(pc);
- pc->c[0] = IDETAPE_INQUIRY_CMD;
- pc->c[4] = pc->request_transfer = 254;
- pc->callback = &idetape_pc_callback;
+ return ret;
}
-static void idetape_create_rewind_cmd (ide_drive_t *drive, idetape_pc_t *pc)
+static void idetape_create_inquiry_cmd(struct ide_atapi_pc *pc)
{
- idetape_init_pc(pc);
- pc->c[0] = IDETAPE_REWIND_CMD;
- set_bit(PC_WAIT_FOR_DSC, &pc->flags);
- pc->callback = &idetape_pc_callback;
+ ide_init_pc(pc);
+ pc->c[0] = INQUIRY;
+ pc->c[4] = 254;
+ pc->req_xfer = 254;
}
-#if 0
-static void idetape_create_mode_select_cmd (idetape_pc_t *pc, int length)
+static void idetape_create_rewind_cmd(ide_drive_t *drive,
+ struct ide_atapi_pc *pc)
{
- idetape_init_pc(pc);
- set_bit(PC_WRITING, &pc->flags);
- pc->c[0] = IDETAPE_MODE_SELECT_CMD;
- pc->c[1] = 0x10;
- put_unaligned(htons(length), (unsigned short *) &pc->c[3]);
- pc->request_transfer = 255;
- pc->callback = &idetape_pc_callback;
+ ide_init_pc(pc);
+ pc->c[0] = REZERO_UNIT;
+ pc->flags |= PC_FLAG_WAIT_FOR_DSC;
}
-#endif
-static void idetape_create_erase_cmd (idetape_pc_t *pc)
+static void idetape_create_erase_cmd(struct ide_atapi_pc *pc)
{
- idetape_init_pc(pc);
- pc->c[0] = IDETAPE_ERASE_CMD;
+ ide_init_pc(pc);
+ pc->c[0] = ERASE;
pc->c[1] = 1;
- set_bit(PC_WAIT_FOR_DSC, &pc->flags);
- pc->callback = &idetape_pc_callback;
+ pc->flags |= PC_FLAG_WAIT_FOR_DSC;
}
-static void idetape_create_space_cmd (idetape_pc_t *pc,int count, u8 cmd)
+static void idetape_create_space_cmd(struct ide_atapi_pc *pc, int count, u8 cmd)
{
- idetape_init_pc(pc);
- pc->c[0] = IDETAPE_SPACE_CMD;
- put_unaligned(htonl(count), (unsigned int *) &pc->c[1]);
+ ide_init_pc(pc);
+ pc->c[0] = SPACE;
+ put_unaligned(cpu_to_be32(count), (unsigned int *) &pc->c[1]);
pc->c[1] = cmd;
- set_bit(PC_WAIT_FOR_DSC, &pc->flags);
- pc->callback = &idetape_pc_callback;
-}
-
-static void idetape_wait_first_stage (ide_drive_t *drive)
-{
- idetape_tape_t *tape = drive->driver_data;
- unsigned long flags;
-
- if (tape->first_stage == NULL)
- return;
- spin_lock_irqsave(&tape->spinlock, flags);
- if (tape->active_stage == tape->first_stage)
- idetape_wait_for_request(drive, tape->active_data_request);
- spin_unlock_irqrestore(&tape->spinlock, flags);
+ pc->flags |= PC_FLAG_WAIT_FOR_DSC;
}
-/*
- * idetape_add_chrdev_write_request tries to add a character device
- * originated write request to our pipeline. In case we don't succeed,
- * we revert to non-pipelined operation mode for this request.
- *
- * 1. Try to allocate a new pipeline stage.
- * 2. If we can't, wait for more and more requests to be serviced
- * and try again each time.
- * 3. If we still can't allocate a stage, fallback to
- * non-pipelined operation mode for this request.
- */
-static int idetape_add_chrdev_write_request (ide_drive_t *drive, int blocks)
+/* Queue up a character device originated write request. */
+static int idetape_add_chrdev_write_request(ide_drive_t *drive, int blocks)
{
idetape_tape_t *tape = drive->driver_data;
- idetape_stage_t *new_stage;
- unsigned long flags;
- struct request *rq;
-
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 3)
- printk(KERN_INFO "ide-tape: Reached idetape_add_chrdev_write_request\n");
-#endif /* IDETAPE_DEBUG_LOG */
-
- /*
- * Attempt to allocate a new stage.
- * Pay special attention to possible race conditions.
- */
- while ((new_stage = idetape_kmalloc_stage(tape)) == NULL) {
- spin_lock_irqsave(&tape->spinlock, flags);
- if (idetape_pipeline_active(tape)) {
- idetape_wait_for_request(drive, tape->active_data_request);
- spin_unlock_irqrestore(&tape->spinlock, flags);
- } else {
- spin_unlock_irqrestore(&tape->spinlock, flags);
- idetape_insert_pipeline_into_queue(drive);
- if (idetape_pipeline_active(tape))
- continue;
- /*
- * Linux is short on memory. Fallback to
- * non-pipelined operation mode for this request.
- */
- return idetape_queue_rw_tail(drive, REQ_IDETAPE_WRITE, blocks, tape->merge_stage->bh);
- }
- }
- rq = &new_stage->rq;
- idetape_init_rq(rq, REQ_IDETAPE_WRITE);
- /* Doesn't actually matter - We always assume sequential access */
- rq->sector = tape->first_frame_position;
- rq->nr_sectors = rq->current_nr_sectors = blocks;
-
- idetape_switch_buffers(tape, new_stage);
- idetape_add_stage_tail(drive, new_stage);
- tape->pipeline_head++;
-#if USE_IOTRACE
- IO_trace(IO_IDETAPE_FIFO, tape->pipeline_head, tape->buffer_head, tape->tape_head, tape->minor);
-#endif
- calculate_speeds(drive);
-
- /*
- * Estimate whether the tape has stopped writing by checking
- * if our write pipeline is currently empty. If we are not
- * writing anymore, wait for the pipeline to be full enough
- * (90%) before starting to service requests, so that we will
- * be able to keep up with the higher speeds of the tape.
- */
- if (!idetape_pipeline_active(tape)) {
- if (tape->nr_stages >= tape->max_stages * 9 / 10 ||
- tape->nr_stages >= tape->max_stages - tape->uncontrolled_pipeline_head_speed * 3 * 1024 / tape->tape_block_size) {
- tape->measure_insert_time = 1;
- tape->insert_time = jiffies;
- tape->insert_size = 0;
- tape->insert_speed = 0;
- idetape_insert_pipeline_into_queue(drive);
- }
- }
- if (test_and_clear_bit(IDETAPE_PIPELINE_ERROR, &tape->flags))
- /* Return a deferred error */
- return -EIO;
- return blocks;
-}
-/*
- * idetape_wait_for_pipeline will wait until all pending pipeline
- * requests are serviced. Typically called on device close.
- */
-static void idetape_wait_for_pipeline (ide_drive_t *drive)
-{
- idetape_tape_t *tape = drive->driver_data;
- unsigned long flags;
+ debug_log(DBG_CHRDEV, "Enter %s\n", __func__);
- while (tape->next_stage || idetape_pipeline_active(tape)) {
- idetape_insert_pipeline_into_queue(drive);
- spin_lock_irqsave(&tape->spinlock, flags);
- if (idetape_pipeline_active(tape))
- idetape_wait_for_request(drive, tape->active_data_request);
- spin_unlock_irqrestore(&tape->spinlock, flags);
- }
+ return idetape_queue_rw_tail(drive, REQ_IDETAPE_WRITE,
+ blocks, tape->merge_bh);
}
-static void idetape_empty_write_pipeline (ide_drive_t *drive)
+static void ide_tape_flush_merge_buffer(ide_drive_t *drive)
{
idetape_tape_t *tape = drive->driver_data;
int blocks, min;
struct idetape_bh *bh;
-
-#if IDETAPE_DEBUG_BUGS
- if (tape->chrdev_direction != idetape_direction_write) {
- printk(KERN_ERR "ide-tape: bug: Trying to empty write pipeline, but we are not writing.\n");
+
+ if (tape->chrdev_dir != IDETAPE_DIR_WRITE) {
+ printk(KERN_ERR "ide-tape: bug: Trying to empty merge buffer"
+ " but we are not writing.\n");
return;
}
- if (tape->merge_stage_size > tape->stage_size) {
+ if (tape->merge_bh_size > tape->buffer_size) {
printk(KERN_ERR "ide-tape: bug: merge_buffer too big\n");
- tape->merge_stage_size = tape->stage_size;
+ tape->merge_bh_size = tape->buffer_size;
}
-#endif /* IDETAPE_DEBUG_BUGS */
- if (tape->merge_stage_size) {
- blocks = tape->merge_stage_size / tape->tape_block_size;
- if (tape->merge_stage_size % tape->tape_block_size) {
+ if (tape->merge_bh_size) {
+ blocks = tape->merge_bh_size / tape->blk_size;
+ if (tape->merge_bh_size % tape->blk_size) {
unsigned int i;
blocks++;
- i = tape->tape_block_size - tape->merge_stage_size % tape->tape_block_size;
+ i = tape->blk_size - tape->merge_bh_size %
+ tape->blk_size;
bh = tape->bh->b_reqnext;
while (bh) {
atomic_set(&bh->b_count, 0);
bh = tape->bh;
while (i) {
if (bh == NULL) {
-
- printk(KERN_INFO "ide-tape: bug, bh NULL\n");
+ printk(KERN_INFO "ide-tape: bug,"
+ " bh NULL\n");
break;
}
- min = min(i, (unsigned int)(bh->b_size - atomic_read(&bh->b_count)));
- memset(bh->b_data + atomic_read(&bh->b_count), 0, min);
+ min = min(i, (unsigned int)(bh->b_size -
+ atomic_read(&bh->b_count)));
+ memset(bh->b_data + atomic_read(&bh->b_count),
+ 0, min);
atomic_add(min, &bh->b_count);
i -= min;
bh = bh->b_reqnext;
}
}
(void) idetape_add_chrdev_write_request(drive, blocks);
- tape->merge_stage_size = 0;
+ tape->merge_bh_size = 0;
}
- idetape_wait_for_pipeline(drive);
- if (tape->merge_stage != NULL) {
- __idetape_kfree_stage(tape->merge_stage);
- tape->merge_stage = NULL;
- }
- clear_bit(IDETAPE_PIPELINE_ERROR, &tape->flags);
- tape->chrdev_direction = idetape_direction_none;
-
- /*
- * On the next backup, perform the feedback loop again.
- * (I don't want to keep sense information between backups,
- * as some systems are constantly on, and the system load
- * can be totally different on the next backup).
- */
- tape->max_stages = tape->min_pipeline;
-#if IDETAPE_DEBUG_BUGS
- if (tape->first_stage != NULL ||
- tape->next_stage != NULL ||
- tape->last_stage != NULL ||
- tape->nr_stages != 0) {
- printk(KERN_ERR "ide-tape: ide-tape pipeline bug, "
- "first_stage %p, next_stage %p, "
- "last_stage %p, nr_stages %d\n",
- tape->first_stage, tape->next_stage,
- tape->last_stage, tape->nr_stages);
+ if (tape->merge_bh != NULL) {
+ ide_tape_kfree_buffer(tape);
+ tape->merge_bh = NULL;
}
-#endif /* IDETAPE_DEBUG_BUGS */
-}
-
-static void idetape_restart_speed_control (ide_drive_t *drive)
-{
- idetape_tape_t *tape = drive->driver_data;
-
- tape->restart_speed_control_req = 0;
- tape->pipeline_head = 0;
- tape->controlled_last_pipeline_head = tape->uncontrolled_last_pipeline_head = 0;
- tape->controlled_previous_pipeline_head = tape->uncontrolled_previous_pipeline_head = 0;
- tape->pipeline_head_speed = tape->controlled_pipeline_head_speed = 5000;
- tape->uncontrolled_pipeline_head_speed = 0;
- tape->controlled_pipeline_head_time = tape->uncontrolled_pipeline_head_time = jiffies;
- tape->controlled_previous_head_time = tape->uncontrolled_previous_head_time = jiffies;
+ tape->chrdev_dir = IDETAPE_DIR_NONE;
}
-static int idetape_initiate_read (ide_drive_t *drive, int max_stages)
+static int idetape_init_read(ide_drive_t *drive)
{
idetape_tape_t *tape = drive->driver_data;
- idetape_stage_t *new_stage;
- struct request rq;
int bytes_read;
- int blocks = tape->capabilities.ctl;
/* Initialize read operation */
- if (tape->chrdev_direction != idetape_direction_read) {
- if (tape->chrdev_direction == idetape_direction_write) {
- idetape_empty_write_pipeline(drive);
+ if (tape->chrdev_dir != IDETAPE_DIR_READ) {
+ if (tape->chrdev_dir == IDETAPE_DIR_WRITE) {
+ ide_tape_flush_merge_buffer(drive);
idetape_flush_tape_buffers(drive);
}
-#if IDETAPE_DEBUG_BUGS
- if (tape->merge_stage || tape->merge_stage_size) {
- printk (KERN_ERR "ide-tape: merge_stage_size should be 0 now\n");
- tape->merge_stage_size = 0;
+ if (tape->merge_bh || tape->merge_bh_size) {
+ printk(KERN_ERR "ide-tape: merge_bh_size should be"
+ " 0 now\n");
+ tape->merge_bh_size = 0;
}
-#endif /* IDETAPE_DEBUG_BUGS */
- if ((tape->merge_stage = __idetape_kmalloc_stage(tape, 0, 0)) == NULL)
+ tape->merge_bh = ide_tape_kmalloc_buffer(tape, 0, 0);
+ if (!tape->merge_bh)
return -ENOMEM;
- tape->chrdev_direction = idetape_direction_read;
+ tape->chrdev_dir = IDETAPE_DIR_READ;
/*
- * Issue a read 0 command to ensure that DSC handshake
- * is switched from completion mode to buffer available
- * mode.
- * No point in issuing this if DSC overlap isn't supported,
- * some drives (Seagate STT3401A) will return an error.
+ * Issue a read 0 command to ensure that DSC handshake is
+ * switched from completion mode to buffer available mode.
+ * No point in issuing this if DSC overlap isn't supported, some
+ * drives (Seagate STT3401A) will return an error.
*/
- if (drive->dsc_overlap) {
- bytes_read = idetape_queue_rw_tail(drive, REQ_IDETAPE_READ, 0, tape->merge_stage->bh);
+ if (drive->dev_flags & IDE_DFLAG_DSC_OVERLAP) {
+ bytes_read = idetape_queue_rw_tail(drive,
+ REQ_IDETAPE_READ, 0,
+ tape->merge_bh);
if (bytes_read < 0) {
- __idetape_kfree_stage(tape->merge_stage);
- tape->merge_stage = NULL;
- tape->chrdev_direction = idetape_direction_none;
+ ide_tape_kfree_buffer(tape);
+ tape->merge_bh = NULL;
+ tape->chrdev_dir = IDETAPE_DIR_NONE;
return bytes_read;
}
}
}
- if (tape->restart_speed_control_req)
- idetape_restart_speed_control(drive);
- idetape_init_rq(&rq, REQ_IDETAPE_READ);
- rq.sector = tape->first_frame_position;
- rq.nr_sectors = rq.current_nr_sectors = blocks;
- if (!test_bit(IDETAPE_PIPELINE_ERROR, &tape->flags) &&
- tape->nr_stages < max_stages) {
- new_stage = idetape_kmalloc_stage(tape);
- while (new_stage != NULL) {
- new_stage->rq = rq;
- idetape_add_stage_tail(drive, new_stage);
- if (tape->nr_stages >= max_stages)
- break;
- new_stage = idetape_kmalloc_stage(tape);
- }
- }
- if (!idetape_pipeline_active(tape)) {
- if (tape->nr_pending_stages >= 3 * max_stages / 4) {
- tape->measure_insert_time = 1;
- tape->insert_time = jiffies;
- tape->insert_size = 0;
- tape->insert_speed = 0;
- idetape_insert_pipeline_into_queue(drive);
- }
- }
+
return 0;
}
-/*
- * idetape_add_chrdev_read_request is called from idetape_chrdev_read
- * to service a character device read request and add read-ahead
- * requests to our pipeline.
- */
-static int idetape_add_chrdev_read_request (ide_drive_t *drive,int blocks)
+/* called from idetape_chrdev_read() to service a chrdev read request. */
+static int idetape_add_chrdev_read_request(ide_drive_t *drive, int blocks)
{
idetape_tape_t *tape = drive->driver_data;
- unsigned long flags;
- struct request *rq_ptr;
- int bytes_read;
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 4)
- printk(KERN_INFO "ide-tape: Reached idetape_add_chrdev_read_request, %d blocks\n", blocks);
-#endif /* IDETAPE_DEBUG_LOG */
+ debug_log(DBG_PROCS, "Enter %s, %d blocks\n", __func__, blocks);
- /*
- * If we are at a filemark, return a read length of 0
- */
- if (test_bit(IDETAPE_FILEMARK, &tape->flags))
+ /* If we are at a filemark, return a read length of 0 */
+ if (test_bit(IDE_AFLAG_FILEMARK, &drive->atapi_flags))
return 0;
- /*
- * Wait for the next block to be available at the head
- * of the pipeline
- */
- idetape_initiate_read(drive, tape->max_stages);
- if (tape->first_stage == NULL) {
- if (test_bit(IDETAPE_PIPELINE_ERROR, &tape->flags))
- return 0;
- return idetape_queue_rw_tail(drive, REQ_IDETAPE_READ, blocks, tape->merge_stage->bh);
- }
- idetape_wait_first_stage(drive);
- rq_ptr = &tape->first_stage->rq;
- bytes_read = tape->tape_block_size * (rq_ptr->nr_sectors - rq_ptr->current_nr_sectors);
- rq_ptr->nr_sectors = rq_ptr->current_nr_sectors = 0;
-
+ idetape_init_read(drive);
- if (rq_ptr->errors == IDETAPE_ERROR_EOD)
- return 0;
- else {
- idetape_switch_buffers(tape, tape->first_stage);
- if (rq_ptr->errors == IDETAPE_ERROR_FILEMARK)
- set_bit(IDETAPE_FILEMARK, &tape->flags);
- spin_lock_irqsave(&tape->spinlock, flags);
- idetape_remove_stage_head(drive);
- spin_unlock_irqrestore(&tape->spinlock, flags);
- tape->pipeline_head++;
-#if USE_IOTRACE
- IO_trace(IO_IDETAPE_FIFO, tape->pipeline_head, tape->buffer_head, tape->tape_head, tape->minor);
-#endif
- calculate_speeds(drive);
- }
-#if IDETAPE_DEBUG_BUGS
- if (bytes_read > blocks * tape->tape_block_size) {
- printk(KERN_ERR "ide-tape: bug: trying to return more bytes than requested\n");
- bytes_read = blocks * tape->tape_block_size;
- }
-#endif /* IDETAPE_DEBUG_BUGS */
- return (bytes_read);
+ return idetape_queue_rw_tail(drive, REQ_IDETAPE_READ, blocks,
+ tape->merge_bh);
}
-static void idetape_pad_zeros (ide_drive_t *drive, int bcount)
+static void idetape_pad_zeros(ide_drive_t *drive, int bcount)
{
idetape_tape_t *tape = drive->driver_data;
struct idetape_bh *bh;
int blocks;
-
+
while (bcount) {
unsigned int count;
- bh = tape->merge_stage->bh;
- count = min(tape->stage_size, bcount);
+ bh = tape->merge_bh;
+ count = min(tape->buffer_size, bcount);
bcount -= count;
- blocks = count / tape->tape_block_size;
+ blocks = count / tape->blk_size;
while (count) {
- atomic_set(&bh->b_count, min(count, (unsigned int)bh->b_size));
+ atomic_set(&bh->b_count,
+ min(count, (unsigned int)bh->b_size));
memset(bh->b_data, 0, atomic_read(&bh->b_count));
count -= atomic_read(&bh->b_count);
bh = bh->b_reqnext;
}
- idetape_queue_rw_tail(drive, REQ_IDETAPE_WRITE, blocks, tape->merge_stage->bh);
- }
-}
-
-static int idetape_pipeline_size (ide_drive_t *drive)
-{
- idetape_tape_t *tape = drive->driver_data;
- idetape_stage_t *stage;
- struct request *rq;
- int size = 0;
-
- idetape_wait_for_pipeline(drive);
- stage = tape->first_stage;
- while (stage != NULL) {
- rq = &stage->rq;
- size += tape->tape_block_size * (rq->nr_sectors-rq->current_nr_sectors);
- if (rq->errors == IDETAPE_ERROR_FILEMARK)
- size += tape->tape_block_size;
- stage = stage->next;
+ idetape_queue_rw_tail(drive, REQ_IDETAPE_WRITE, blocks,
+ tape->merge_bh);
}
- size += tape->merge_stage_size;
- return size;
}
/*
- * Rewinds the tape to the Beginning Of the current Partition (BOP).
- *
- * We currently support only one partition.
- */
-static int idetape_rewind_tape (ide_drive_t *drive)
+ * Rewinds the tape to the Beginning Of the current Partition (BOP). We
+ * currently support only one partition.
+ */
+static int idetape_rewind_tape(ide_drive_t *drive)
{
+ struct ide_tape_obj *tape = drive->driver_data;
+ struct gendisk *disk = tape->disk;
int retval;
- idetape_pc_t pc;
-#if IDETAPE_DEBUG_LOG
- idetape_tape_t *tape = drive->driver_data;
- if (tape->debug_level >= 2)
- printk(KERN_INFO "ide-tape: Reached idetape_rewind_tape\n");
-#endif /* IDETAPE_DEBUG_LOG */
-
+ struct ide_atapi_pc pc;
+
+ debug_log(DBG_SENSE, "Enter %s\n", __func__);
+
idetape_create_rewind_cmd(drive, &pc);
- retval = idetape_queue_pc_tail(drive, &pc);
+ retval = ide_queue_pc_tail(drive, disk, &pc);
if (retval)
return retval;
idetape_create_read_position_cmd(&pc);
- retval = idetape_queue_pc_tail(drive, &pc);
+ retval = ide_queue_pc_tail(drive, disk, &pc);
if (retval)
return retval;
return 0;
}
-/*
- * Our special ide-tape ioctl's.
- *
- * Currently there aren't any ioctl's.
- * mtio.h compatible commands should be issued to the character device
- * interface.
- */
-static int idetape_blkdev_ioctl(ide_drive_t *drive, unsigned int cmd, unsigned long arg)
+/* mtio.h compatible commands should be issued to the chrdev interface. */
+static int idetape_blkdev_ioctl(ide_drive_t *drive, unsigned int cmd,
+ unsigned long arg)
{
idetape_tape_t *tape = drive->driver_data;
- idetape_config_t config;
void __user *argp = (void __user *)arg;
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 4)
- printk(KERN_INFO "ide-tape: Reached idetape_blkdev_ioctl\n");
-#endif /* IDETAPE_DEBUG_LOG */
+ struct idetape_config {
+ int dsc_rw_frequency;
+ int dsc_media_access_frequency;
+ int nr_stages;
+ } config;
+
+ debug_log(DBG_PROCS, "Enter %s\n", __func__);
+
switch (cmd) {
- case 0x0340:
- if (copy_from_user(&config, argp, sizeof (idetape_config_t)))
- return -EFAULT;
- tape->best_dsc_rw_frequency = config.dsc_rw_frequency;
- tape->max_stages = config.nr_stages;
- break;
- case 0x0350:
- config.dsc_rw_frequency = (int) tape->best_dsc_rw_frequency;
- config.nr_stages = tape->max_stages;
- if (copy_to_user(argp, &config, sizeof (idetape_config_t)))
- return -EFAULT;
- break;
- default:
- return -EIO;
+ case 0x0340:
+ if (copy_from_user(&config, argp, sizeof(config)))
+ return -EFAULT;
+ tape->best_dsc_rw_freq = config.dsc_rw_frequency;
+ break;
+ case 0x0350:
+ config.dsc_rw_frequency = (int) tape->best_dsc_rw_freq;
+ config.nr_stages = 1;
+ if (copy_to_user(argp, &config, sizeof(config)))
+ return -EFAULT;
+ break;
+ default:
+ return -EIO;
}
return 0;
}
-/*
- * idetape_space_over_filemarks is now a bit more complicated than just
- * passing the command to the tape since we may have crossed some
- * filemarks during our pipelined read-ahead mode.
- *
- * As a minor side effect, the pipeline enables us to support MTFSFM when
- * the filemark is in our internal pipeline even if the tape doesn't
- * support spacing over filemarks in the reverse direction.
- */
-static int idetape_space_over_filemarks (ide_drive_t *drive,short mt_op,int mt_count)
+static int idetape_space_over_filemarks(ide_drive_t *drive, short mt_op,
+ int mt_count)
{
idetape_tape_t *tape = drive->driver_data;
- idetape_pc_t pc;
- unsigned long flags;
- int retval,count=0;
+ struct gendisk *disk = tape->disk;
+ struct ide_atapi_pc pc;
+ int retval, count = 0;
+ int sprev = !!(tape->caps[4] & 0x20);
if (mt_count == 0)
return 0;
if (MTBSF == mt_op || MTBSFM == mt_op) {
- if (!tape->capabilities.sprev)
+ if (!sprev)
return -EIO;
- mt_count = - mt_count;
+ mt_count = -mt_count;
}
- if (tape->chrdev_direction == idetape_direction_read) {
- /*
- * We have a read-ahead buffer. Scan it for crossed
- * filemarks.
- */
- tape->merge_stage_size = 0;
- if (test_and_clear_bit(IDETAPE_FILEMARK, &tape->flags))
+ if (tape->chrdev_dir == IDETAPE_DIR_READ) {
+ tape->merge_bh_size = 0;
+ if (test_and_clear_bit(IDE_AFLAG_FILEMARK, &drive->atapi_flags))
++count;
- while (tape->first_stage != NULL) {
- if (count == mt_count) {
- if (mt_op == MTFSFM)
- set_bit(IDETAPE_FILEMARK, &tape->flags);
- return 0;
- }
- spin_lock_irqsave(&tape->spinlock, flags);
- if (tape->first_stage == tape->active_stage) {
- /*
- * We have reached the active stage in the read pipeline.
- * There is no point in allowing the drive to continue
- * reading any farther, so we stop the pipeline.
- *
- * This section should be moved to a separate subroutine,
- * because a similar function is performed in
- * __idetape_discard_read_pipeline(), for example.
- */
- tape->next_stage = NULL;
- spin_unlock_irqrestore(&tape->spinlock, flags);
- idetape_wait_first_stage(drive);
- tape->next_stage = tape->first_stage->next;
- } else
- spin_unlock_irqrestore(&tape->spinlock, flags);
- if (tape->first_stage->rq.errors == IDETAPE_ERROR_FILEMARK)
- ++count;
- idetape_remove_stage_head(drive);
- }
- idetape_discard_read_pipeline(drive, 0);
+ ide_tape_discard_merge_buffer(drive, 0);
}
- /*
- * The filemark was not found in our internal pipeline.
- * Now we can issue the space command.
- */
switch (mt_op) {
- case MTFSF:
- case MTBSF:
- idetape_create_space_cmd(&pc,mt_count-count,IDETAPE_SPACE_OVER_FILEMARK);
- return (idetape_queue_pc_tail(drive, &pc));
- case MTFSFM:
- case MTBSFM:
- if (!tape->capabilities.sprev)
- return (-EIO);
- retval = idetape_space_over_filemarks(drive, MTFSF, mt_count-count);
- if (retval) return (retval);
- count = (MTBSFM == mt_op ? 1 : -1);
- return (idetape_space_over_filemarks(drive, MTFSF, count));
- default:
- printk(KERN_ERR "ide-tape: MTIO operation %d not supported\n",mt_op);
- return (-EIO);
+ case MTFSF:
+ case MTBSF:
+ idetape_create_space_cmd(&pc, mt_count - count,
+ IDETAPE_SPACE_OVER_FILEMARK);
+ return ide_queue_pc_tail(drive, disk, &pc);
+ case MTFSFM:
+ case MTBSFM:
+ if (!sprev)
+ return -EIO;
+ retval = idetape_space_over_filemarks(drive, MTFSF,
+ mt_count - count);
+ if (retval)
+ return retval;
+ count = (MTBSFM == mt_op ? 1 : -1);
+ return idetape_space_over_filemarks(drive, MTFSF, count);
+ default:
+ printk(KERN_ERR "ide-tape: MTIO operation %d not supported\n",
+ mt_op);
+ return -EIO;
}
}
-
/*
- * Our character device read / write functions.
+ * Our character device read / write functions.
*
- * The tape is optimized to maximize throughput when it is transferring
- * an integral number of the "continuous transfer limit", which is
- * a parameter of the specific tape (26 KB on my particular tape).
- * (32 kB for Onstream)
+ * The tape is optimized to maximize throughput when it is transferring an
+ * integral number of the "continuous transfer limit", which is a parameter of
+ * the specific tape (26kB on my particular tape, 32kB for Onstream).
*
- * As of version 1.3 of the driver, the character device provides an
- * abstract continuous view of the media - any mix of block sizes (even 1
- * byte) on the same backup/restore procedure is supported. The driver
- * will internally convert the requests to the recommended transfer unit,
- * so that an unmatch between the user's block size to the recommended
- * size will only result in a (slightly) increased driver overhead, but
- * will no longer hit performance.
- * This is not applicable to Onstream.
+ * As of version 1.3 of the driver, the character device provides an abstract
+ * continuous view of the media - any mix of block sizes (even 1 byte) on the
+ * same backup/restore procedure is supported. The driver will internally
+ * convert the requests to the recommended transfer unit, so that an unmatch
+ * between the user's block size to the recommended size will only result in a
+ * (slightly) increased driver overhead, but will no longer hit performance.
+ * This is not applicable to Onstream.
*/
-static ssize_t idetape_chrdev_read (struct file *file, char __user *buf,
- size_t count, loff_t *ppos)
+static ssize_t idetape_chrdev_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
{
- struct ide_tape_obj *tape = ide_tape_f(file);
+ struct ide_tape_obj *tape = file->private_data;
ide_drive_t *drive = tape->drive;
- ssize_t bytes_read,temp, actually_read = 0, rc;
+ ssize_t bytes_read, temp, actually_read = 0, rc;
ssize_t ret = 0;
+ u16 ctl = *(u16 *)&tape->caps[12];
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 3)
- printk(KERN_INFO "ide-tape: Reached idetape_chrdev_read, count %Zd\n", count);
-#endif /* IDETAPE_DEBUG_LOG */
-
- if (tape->chrdev_direction != idetape_direction_read) {
- if (test_bit(IDETAPE_DETECT_BS, &tape->flags))
- if (count > tape->tape_block_size &&
- (count % tape->tape_block_size) == 0)
- tape->user_bs_factor = count / tape->tape_block_size;
+ debug_log(DBG_CHRDEV, "Enter %s, count %Zd\n", __func__, count);
+
+ if (tape->chrdev_dir != IDETAPE_DIR_READ) {
+ if (test_bit(IDE_AFLAG_DETECT_BS, &drive->atapi_flags))
+ if (count > tape->blk_size &&
+ (count % tape->blk_size) == 0)
+ tape->user_bs_factor = count / tape->blk_size;
}
- if ((rc = idetape_initiate_read(drive, tape->max_stages)) < 0)
+ rc = idetape_init_read(drive);
+ if (rc < 0)
return rc;
if (count == 0)
return (0);
- if (tape->merge_stage_size) {
- actually_read = min((unsigned int)(tape->merge_stage_size), (unsigned int)count);
- if (idetape_copy_stage_to_user(tape, buf, tape->merge_stage, actually_read))
+ if (tape->merge_bh_size) {
+ actually_read = min((unsigned int)(tape->merge_bh_size),
+ (unsigned int)count);
+ if (idetape_copy_stage_to_user(tape, buf, actually_read))
ret = -EFAULT;
buf += actually_read;
- tape->merge_stage_size -= actually_read;
+ tape->merge_bh_size -= actually_read;
count -= actually_read;
}
- while (count >= tape->stage_size) {
- bytes_read = idetape_add_chrdev_read_request(drive, tape->capabilities.ctl);
+ while (count >= tape->buffer_size) {
+ bytes_read = idetape_add_chrdev_read_request(drive, ctl);
if (bytes_read <= 0)
goto finish;
- if (idetape_copy_stage_to_user(tape, buf, tape->merge_stage, bytes_read))
+ if (idetape_copy_stage_to_user(tape, buf, bytes_read))
ret = -EFAULT;
buf += bytes_read;
count -= bytes_read;
actually_read += bytes_read;
}
if (count) {
- bytes_read = idetape_add_chrdev_read_request(drive, tape->capabilities.ctl);
+ bytes_read = idetape_add_chrdev_read_request(drive, ctl);
if (bytes_read <= 0)
goto finish;
temp = min((unsigned long)count, (unsigned long)bytes_read);
- if (idetape_copy_stage_to_user(tape, buf, tape->merge_stage, temp))
+ if (idetape_copy_stage_to_user(tape, buf, temp))
ret = -EFAULT;
actually_read += temp;
- tape->merge_stage_size = bytes_read-temp;
+ tape->merge_bh_size = bytes_read-temp;
}
finish:
- if (!actually_read && test_bit(IDETAPE_FILEMARK, &tape->flags)) {
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 2)
- printk(KERN_INFO "ide-tape: %s: spacing over filemark\n", tape->name);
-#endif
+ if (!actually_read && test_bit(IDE_AFLAG_FILEMARK, &drive->atapi_flags)) {
+ debug_log(DBG_SENSE, "%s: spacing over filemark\n", tape->name);
+
idetape_space_over_filemarks(drive, MTFSF, 1);
return 0;
}
- return (ret) ? ret : actually_read;
+ return ret ? ret : actually_read;
}
-static ssize_t idetape_chrdev_write (struct file *file, const char __user *buf,
+static ssize_t idetape_chrdev_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
- struct ide_tape_obj *tape = ide_tape_f(file);
+ struct ide_tape_obj *tape = file->private_data;
ide_drive_t *drive = tape->drive;
ssize_t actually_written = 0;
ssize_t ret = 0;
+ u16 ctl = *(u16 *)&tape->caps[12];
/* The drive is write protected. */
if (tape->write_prot)
return -EACCES;
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 3)
- printk(KERN_INFO "ide-tape: Reached idetape_chrdev_write, "
- "count %Zd\n", count);
-#endif /* IDETAPE_DEBUG_LOG */
+ debug_log(DBG_CHRDEV, "Enter %s, count %Zd\n", __func__, count);
/* Initialize write operation */
- if (tape->chrdev_direction != idetape_direction_write) {
- if (tape->chrdev_direction == idetape_direction_read)
- idetape_discard_read_pipeline(drive, 1);
-#if IDETAPE_DEBUG_BUGS
- if (tape->merge_stage || tape->merge_stage_size) {
- printk(KERN_ERR "ide-tape: merge_stage_size "
+ if (tape->chrdev_dir != IDETAPE_DIR_WRITE) {
+ if (tape->chrdev_dir == IDETAPE_DIR_READ)
+ ide_tape_discard_merge_buffer(drive, 1);
+ if (tape->merge_bh || tape->merge_bh_size) {
+ printk(KERN_ERR "ide-tape: merge_bh_size "
"should be 0 now\n");
- tape->merge_stage_size = 0;
+ tape->merge_bh_size = 0;
}
-#endif /* IDETAPE_DEBUG_BUGS */
- if ((tape->merge_stage = __idetape_kmalloc_stage(tape, 0, 0)) == NULL)
+ tape->merge_bh = ide_tape_kmalloc_buffer(tape, 0, 0);
+ if (!tape->merge_bh)
return -ENOMEM;
- tape->chrdev_direction = idetape_direction_write;
- idetape_init_merge_stage(tape);
+ tape->chrdev_dir = IDETAPE_DIR_WRITE;
+ idetape_init_merge_buffer(tape);
/*
- * Issue a write 0 command to ensure that DSC handshake
- * is switched from completion mode to buffer available
- * mode.
- * No point in issuing this if DSC overlap isn't supported,
- * some drives (Seagate STT3401A) will return an error.
+ * Issue a write 0 command to ensure that DSC handshake is
+ * switched from completion mode to buffer available mode. No
+ * point in issuing this if DSC overlap isn't supported, some
+ * drives (Seagate STT3401A) will return an error.
*/
- if (drive->dsc_overlap) {
- ssize_t retval = idetape_queue_rw_tail(drive, REQ_IDETAPE_WRITE, 0, tape->merge_stage->bh);
+ if (drive->dev_flags & IDE_DFLAG_DSC_OVERLAP) {
+ ssize_t retval = idetape_queue_rw_tail(drive,
+ REQ_IDETAPE_WRITE, 0,
+ tape->merge_bh);
if (retval < 0) {
- __idetape_kfree_stage(tape->merge_stage);
- tape->merge_stage = NULL;
- tape->chrdev_direction = idetape_direction_none;
+ ide_tape_kfree_buffer(tape);
+ tape->merge_bh = NULL;
+ tape->chrdev_dir = IDETAPE_DIR_NONE;
return retval;
}
}
}
if (count == 0)
return (0);
- if (tape->restart_speed_control_req)
- idetape_restart_speed_control(drive);
- if (tape->merge_stage_size) {
-#if IDETAPE_DEBUG_BUGS
- if (tape->merge_stage_size >= tape->stage_size) {
- printk(KERN_ERR "ide-tape: bug: merge buffer too big\n");
- tape->merge_stage_size = 0;
+ if (tape->merge_bh_size) {
+ if (tape->merge_bh_size >= tape->buffer_size) {
+ printk(KERN_ERR "ide-tape: bug: merge buf too big\n");
+ tape->merge_bh_size = 0;
}
-#endif /* IDETAPE_DEBUG_BUGS */
- actually_written = min((unsigned int)(tape->stage_size - tape->merge_stage_size), (unsigned int)count);
- if (idetape_copy_stage_from_user(tape, tape->merge_stage, buf, actually_written))
+ actually_written = min((unsigned int)
+ (tape->buffer_size - tape->merge_bh_size),
+ (unsigned int)count);
+ if (idetape_copy_stage_from_user(tape, buf, actually_written))
ret = -EFAULT;
buf += actually_written;
- tape->merge_stage_size += actually_written;
+ tape->merge_bh_size += actually_written;
count -= actually_written;
- if (tape->merge_stage_size == tape->stage_size) {
+ if (tape->merge_bh_size == tape->buffer_size) {
ssize_t retval;
- tape->merge_stage_size = 0;
- retval = idetape_add_chrdev_write_request(drive, tape->capabilities.ctl);
+ tape->merge_bh_size = 0;
+ retval = idetape_add_chrdev_write_request(drive, ctl);
if (retval <= 0)
return (retval);
}
}
- while (count >= tape->stage_size) {
+ while (count >= tape->buffer_size) {
ssize_t retval;
- if (idetape_copy_stage_from_user(tape, tape->merge_stage, buf, tape->stage_size))
+ if (idetape_copy_stage_from_user(tape, buf, tape->buffer_size))
ret = -EFAULT;
- buf += tape->stage_size;
- count -= tape->stage_size;
- retval = idetape_add_chrdev_write_request(drive, tape->capabilities.ctl);
- actually_written += tape->stage_size;
+ buf += tape->buffer_size;
+ count -= tape->buffer_size;
+ retval = idetape_add_chrdev_write_request(drive, ctl);
+ actually_written += tape->buffer_size;
if (retval <= 0)
return (retval);
}
if (count) {
actually_written += count;
- if (idetape_copy_stage_from_user(tape, tape->merge_stage, buf, count))
+ if (idetape_copy_stage_from_user(tape, buf, count))
ret = -EFAULT;
- tape->merge_stage_size += count;
+ tape->merge_bh_size += count;
}
- return (ret) ? ret : actually_written;
+ return ret ? ret : actually_written;
}
-static int idetape_write_filemark (ide_drive_t *drive)
+static int idetape_write_filemark(ide_drive_t *drive)
{
- idetape_pc_t pc;
+ struct ide_tape_obj *tape = drive->driver_data;
+ struct ide_atapi_pc pc;
/* Write a filemark */
idetape_create_write_filemark_cmd(drive, &pc, 1);
- if (idetape_queue_pc_tail(drive, &pc)) {
+ if (ide_queue_pc_tail(drive, tape->disk, &pc)) {
printk(KERN_ERR "ide-tape: Couldn't write a filemark\n");
return -EIO;
}
}
/*
- * idetape_mtioctop is called from idetape_chrdev_ioctl when
- * the general mtio MTIOCTOP ioctl is requested.
- *
- * We currently support the following mtio.h operations:
- *
- * MTFSF - Space over mt_count filemarks in the positive direction.
- * The tape is positioned after the last spaced filemark.
- *
- * MTFSFM - Same as MTFSF, but the tape is positioned before the
- * last filemark.
- *
- * MTBSF - Steps background over mt_count filemarks, tape is
- * positioned before the last filemark.
- *
- * MTBSFM - Like MTBSF, only tape is positioned after the last filemark.
+ * Called from idetape_chrdev_ioctl when the general mtio MTIOCTOP ioctl is
+ * requested.
*
- * Note:
+ * Note: MTBSF and MTBSFM are not supported when the tape doesn't support
+ * spacing over filemarks in the reverse direction. In this case, MTFSFM is also
+ * usually not supported.
*
- * MTBSF and MTBSFM are not supported when the tape doesn't
- * support spacing over filemarks in the reverse direction.
- * In this case, MTFSFM is also usually not supported (it is
- * supported in the rare case in which we crossed the filemark
- * during our read-ahead pipelined operation mode).
- *
- * MTWEOF - Writes mt_count filemarks. Tape is positioned after
- * the last written filemark.
+ * The following commands are currently not supported:
*
- * MTREW - Rewinds tape.
- *
- * MTLOAD - Loads the tape.
- *
- * MTOFFL - Puts the tape drive "Offline": Rewinds the tape and
- * MTUNLOAD prevents further access until the media is replaced.
- *
- * MTNOP - Flushes tape buffers.
- *
- * MTRETEN - Retension media. This typically consists of one end
- * to end pass on the media.
- *
- * MTEOM - Moves to the end of recorded data.
- *
- * MTERASE - Erases tape.
- *
- * MTSETBLK - Sets the user block size to mt_count bytes. If
- * mt_count is 0, we will attempt to autodetect
- * the block size.
- *
- * MTSEEK - Positions the tape in a specific block number, where
- * each block is assumed to contain which user_block_size
- * bytes.
- *
- * MTSETPART - Switches to another tape partition.
- *
- * MTLOCK - Locks the tape door.
- *
- * MTUNLOCK - Unlocks the tape door.
- *
- * The following commands are currently not supported:
- *
- * MTFSS, MTBSS, MTWSM, MTSETDENSITY,
- * MTSETDRVBUFFER, MT_ST_BOOLEANS, MT_ST_WRITE_THRESHOLD.
+ * MTFSS, MTBSS, MTWSM, MTSETDENSITY, MTSETDRVBUFFER, MT_ST_BOOLEANS,
+ * MT_ST_WRITE_THRESHOLD.
*/
-static int idetape_mtioctop (ide_drive_t *drive,short mt_op,int mt_count)
+static int idetape_mtioctop(ide_drive_t *drive, short mt_op, int mt_count)
{
idetape_tape_t *tape = drive->driver_data;
- idetape_pc_t pc;
- int i,retval;
+ struct gendisk *disk = tape->disk;
+ struct ide_atapi_pc pc;
+ int i, retval;
+
+ debug_log(DBG_ERR, "Handling MTIOCTOP ioctl: mt_op=%d, mt_count=%d\n",
+ mt_op, mt_count);
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 1)
- printk(KERN_INFO "ide-tape: Handling MTIOCTOP ioctl: "
- "mt_op=%d, mt_count=%d\n", mt_op, mt_count);
-#endif /* IDETAPE_DEBUG_LOG */
- /*
- * Commands which need our pipelined read-ahead stages.
- */
switch (mt_op) {
- case MTFSF:
- case MTFSFM:
- case MTBSF:
- case MTBSFM:
- if (!mt_count)
- return (0);
- return (idetape_space_over_filemarks(drive,mt_op,mt_count));
- default:
- break;
+ case MTFSF:
+ case MTFSFM:
+ case MTBSF:
+ case MTBSFM:
+ if (!mt_count)
+ return 0;
+ return idetape_space_over_filemarks(drive, mt_op, mt_count);
+ default:
+ break;
}
+
switch (mt_op) {
- case MTWEOF:
- if (tape->write_prot)
- return -EACCES;
- idetape_discard_read_pipeline(drive, 1);
- for (i = 0; i < mt_count; i++) {
- retval = idetape_write_filemark(drive);
- if (retval)
- return retval;
- }
- return (0);
- case MTREW:
- idetape_discard_read_pipeline(drive, 0);
- if (idetape_rewind_tape(drive))
+ case MTWEOF:
+ if (tape->write_prot)
+ return -EACCES;
+ ide_tape_discard_merge_buffer(drive, 1);
+ for (i = 0; i < mt_count; i++) {
+ retval = idetape_write_filemark(drive);
+ if (retval)
+ return retval;
+ }
+ return 0;
+ case MTREW:
+ ide_tape_discard_merge_buffer(drive, 0);
+ if (idetape_rewind_tape(drive))
+ return -EIO;
+ return 0;
+ case MTLOAD:
+ ide_tape_discard_merge_buffer(drive, 0);
+ return ide_do_start_stop(drive, disk, IDETAPE_LU_LOAD_MASK);
+ case MTUNLOAD:
+ case MTOFFL:
+ /*
+ * If door is locked, attempt to unlock before
+ * attempting to eject.
+ */
+ if (tape->door_locked) {
+ if (!ide_set_media_lock(drive, disk, 0))
+ tape->door_locked = DOOR_UNLOCKED;
+ }
+ ide_tape_discard_merge_buffer(drive, 0);
+ retval = ide_do_start_stop(drive, disk, !IDETAPE_LU_LOAD_MASK);
+ if (!retval)
+ clear_bit(IDE_AFLAG_MEDIUM_PRESENT, &drive->atapi_flags);
+ return retval;
+ case MTNOP:
+ ide_tape_discard_merge_buffer(drive, 0);
+ return idetape_flush_tape_buffers(drive);
+ case MTRETEN:
+ ide_tape_discard_merge_buffer(drive, 0);
+ return ide_do_start_stop(drive, disk,
+ IDETAPE_LU_RETENSION_MASK | IDETAPE_LU_LOAD_MASK);
+ case MTEOM:
+ idetape_create_space_cmd(&pc, 0, IDETAPE_SPACE_TO_EOD);
+ return ide_queue_pc_tail(drive, disk, &pc);
+ case MTERASE:
+ (void)idetape_rewind_tape(drive);
+ idetape_create_erase_cmd(&pc);
+ return ide_queue_pc_tail(drive, disk, &pc);
+ case MTSETBLK:
+ if (mt_count) {
+ if (mt_count < tape->blk_size ||
+ mt_count % tape->blk_size)
return -EIO;
- return 0;
- case MTLOAD:
- idetape_discard_read_pipeline(drive, 0);
- idetape_create_load_unload_cmd(drive, &pc, IDETAPE_LU_LOAD_MASK);
- return (idetape_queue_pc_tail(drive, &pc));
- case MTUNLOAD:
- case MTOFFL:
- /*
- * If door is locked, attempt to unlock before
- * attempting to eject.
- */
- if (tape->door_locked) {
- if (idetape_create_prevent_cmd(drive, &pc, 0))
- if (!idetape_queue_pc_tail(drive, &pc))
- tape->door_locked = DOOR_UNLOCKED;
- }
- idetape_discard_read_pipeline(drive, 0);
- idetape_create_load_unload_cmd(drive, &pc,!IDETAPE_LU_LOAD_MASK);
- retval = idetape_queue_pc_tail(drive, &pc);
- if (!retval)
- clear_bit(IDETAPE_MEDIUM_PRESENT, &tape->flags);
+ tape->user_bs_factor = mt_count / tape->blk_size;
+ clear_bit(IDE_AFLAG_DETECT_BS, &drive->atapi_flags);
+ } else
+ set_bit(IDE_AFLAG_DETECT_BS, &drive->atapi_flags);
+ return 0;
+ case MTSEEK:
+ ide_tape_discard_merge_buffer(drive, 0);
+ return idetape_position_tape(drive,
+ mt_count * tape->user_bs_factor, tape->partition, 0);
+ case MTSETPART:
+ ide_tape_discard_merge_buffer(drive, 0);
+ return idetape_position_tape(drive, 0, mt_count, 0);
+ case MTFSR:
+ case MTBSR:
+ case MTLOCK:
+ retval = ide_set_media_lock(drive, disk, 1);
+ if (retval)
return retval;
- case MTNOP:
- idetape_discard_read_pipeline(drive, 0);
- return (idetape_flush_tape_buffers(drive));
- case MTRETEN:
- idetape_discard_read_pipeline(drive, 0);
- idetape_create_load_unload_cmd(drive, &pc,IDETAPE_LU_RETENSION_MASK | IDETAPE_LU_LOAD_MASK);
- return (idetape_queue_pc_tail(drive, &pc));
- case MTEOM:
- idetape_create_space_cmd(&pc, 0, IDETAPE_SPACE_TO_EOD);
- return (idetape_queue_pc_tail(drive, &pc));
- case MTERASE:
- (void) idetape_rewind_tape(drive);
- idetape_create_erase_cmd(&pc);
- return (idetape_queue_pc_tail(drive, &pc));
- case MTSETBLK:
- if (mt_count) {
- if (mt_count < tape->tape_block_size || mt_count % tape->tape_block_size)
- return -EIO;
- tape->user_bs_factor = mt_count / tape->tape_block_size;
- clear_bit(IDETAPE_DETECT_BS, &tape->flags);
- } else
- set_bit(IDETAPE_DETECT_BS, &tape->flags);
- return 0;
- case MTSEEK:
- idetape_discard_read_pipeline(drive, 0);
- return idetape_position_tape(drive, mt_count * tape->user_bs_factor, tape->partition, 0);
- case MTSETPART:
- idetape_discard_read_pipeline(drive, 0);
- return (idetape_position_tape(drive, 0, mt_count, 0));
- case MTFSR:
- case MTBSR:
- case MTLOCK:
- if (!idetape_create_prevent_cmd(drive, &pc, 1))
- return 0;
- retval = idetape_queue_pc_tail(drive, &pc);
- if (retval) return retval;
- tape->door_locked = DOOR_EXPLICITLY_LOCKED;
- return 0;
- case MTUNLOCK:
- if (!idetape_create_prevent_cmd(drive, &pc, 0))
- return 0;
- retval = idetape_queue_pc_tail(drive, &pc);
- if (retval) return retval;
- tape->door_locked = DOOR_UNLOCKED;
- return 0;
- default:
- printk(KERN_ERR "ide-tape: MTIO operation %d not "
- "supported\n", mt_op);
- return (-EIO);
+ tape->door_locked = DOOR_EXPLICITLY_LOCKED;
+ return 0;
+ case MTUNLOCK:
+ retval = ide_set_media_lock(drive, disk, 0);
+ if (retval)
+ return retval;
+ tape->door_locked = DOOR_UNLOCKED;
+ return 0;
+ default:
+ printk(KERN_ERR "ide-tape: MTIO operation %d not supported\n",
+ mt_op);
+ return -EIO;
}
}
/*
- * Our character device ioctls.
- *
- * General mtio.h magnetic io commands are supported here, and not in
- * the corresponding block interface.
- *
- * The following ioctls are supported:
- *
- * MTIOCTOP - Refer to idetape_mtioctop for detailed description.
- *
- * MTIOCGET - The mt_dsreg field in the returned mtget structure
- * will be set to (user block size in bytes <<
- * MT_ST_BLKSIZE_SHIFT) & MT_ST_BLKSIZE_MASK.
- *
- * The mt_blkno is set to the current user block number.
- * The other mtget fields are not supported.
- *
- * MTIOCPOS - The current tape "block position" is returned. We
- * assume that each block contains user_block_size
- * bytes.
- *
- * Our own ide-tape ioctls are supported on both interfaces.
+ * Our character device ioctls. General mtio.h magnetic io commands are
+ * supported here, and not in the corresponding block interface. Our own
+ * ide-tape ioctls are supported on both interfaces.
*/
-static int idetape_chrdev_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+static int idetape_chrdev_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
{
- struct ide_tape_obj *tape = ide_tape_f(file);
+ struct ide_tape_obj *tape = file->private_data;
ide_drive_t *drive = tape->drive;
struct mtop mtop;
struct mtget mtget;
struct mtpos mtpos;
- int block_offset = 0, position = tape->first_frame_position;
+ int block_offset = 0, position = tape->first_frame;
void __user *argp = (void __user *)arg;
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 3)
- printk(KERN_INFO "ide-tape: Reached idetape_chrdev_ioctl, "
- "cmd=%u\n", cmd);
-#endif /* IDETAPE_DEBUG_LOG */
-
- tape->restart_speed_control_req = 1;
- if (tape->chrdev_direction == idetape_direction_write) {
- idetape_empty_write_pipeline(drive);
+ debug_log(DBG_CHRDEV, "Enter %s, cmd=%u\n", __func__, cmd);
+
+ if (tape->chrdev_dir == IDETAPE_DIR_WRITE) {
+ ide_tape_flush_merge_buffer(drive);
idetape_flush_tape_buffers(drive);
}
if (cmd == MTIOCGET || cmd == MTIOCPOS) {
- block_offset = idetape_pipeline_size(drive) / (tape->tape_block_size * tape->user_bs_factor);
- if ((position = idetape_read_position(drive)) < 0)
+ block_offset = tape->merge_bh_size /
+ (tape->blk_size * tape->user_bs_factor);
+ position = idetape_read_position(drive);
+ if (position < 0)
return -EIO;
}
switch (cmd) {
- case MTIOCTOP:
- if (copy_from_user(&mtop, argp, sizeof (struct mtop)))
- return -EFAULT;
- return (idetape_mtioctop(drive,mtop.mt_op,mtop.mt_count));
- case MTIOCGET:
- memset(&mtget, 0, sizeof (struct mtget));
- mtget.mt_type = MT_ISSCSI2;
- mtget.mt_blkno = position / tape->user_bs_factor - block_offset;
- mtget.mt_dsreg = ((tape->tape_block_size * tape->user_bs_factor) << MT_ST_BLKSIZE_SHIFT) & MT_ST_BLKSIZE_MASK;
- if (tape->drv_write_prot) {
- mtget.mt_gstat |= GMT_WR_PROT(0xffffffff);
- }
- if (copy_to_user(argp, &mtget, sizeof(struct mtget)))
- return -EFAULT;
- return 0;
- case MTIOCPOS:
- mtpos.mt_blkno = position / tape->user_bs_factor - block_offset;
- if (copy_to_user(argp, &mtpos, sizeof(struct mtpos)))
- return -EFAULT;
- return 0;
- default:
- if (tape->chrdev_direction == idetape_direction_read)
- idetape_discard_read_pipeline(drive, 1);
- return idetape_blkdev_ioctl(drive, cmd, arg);
+ case MTIOCTOP:
+ if (copy_from_user(&mtop, argp, sizeof(struct mtop)))
+ return -EFAULT;
+ return idetape_mtioctop(drive, mtop.mt_op, mtop.mt_count);
+ case MTIOCGET:
+ memset(&mtget, 0, sizeof(struct mtget));
+ mtget.mt_type = MT_ISSCSI2;
+ mtget.mt_blkno = position / tape->user_bs_factor - block_offset;
+ mtget.mt_dsreg =
+ ((tape->blk_size * tape->user_bs_factor)
+ << MT_ST_BLKSIZE_SHIFT) & MT_ST_BLKSIZE_MASK;
+
+ if (tape->drv_write_prot)
+ mtget.mt_gstat |= GMT_WR_PROT(0xffffffff);
+
+ if (copy_to_user(argp, &mtget, sizeof(struct mtget)))
+ return -EFAULT;
+ return 0;
+ case MTIOCPOS:
+ mtpos.mt_blkno = position / tape->user_bs_factor - block_offset;
+ if (copy_to_user(argp, &mtpos, sizeof(struct mtpos)))
+ return -EFAULT;
+ return 0;
+ default:
+ if (tape->chrdev_dir == IDETAPE_DIR_READ)
+ ide_tape_discard_merge_buffer(drive, 1);
+ return idetape_blkdev_ioctl(drive, cmd, arg);
}
}
-static void idetape_get_blocksize_from_block_descriptor(ide_drive_t *drive);
-
/*
- * Our character device open function.
+ * Do a mode sense page 0 with block descriptor and if it succeeds set the tape
+ * block size with the reported value.
*/
-static int idetape_chrdev_open (struct inode *inode, struct file *filp)
+static void ide_tape_get_bsize_from_bdesc(ide_drive_t *drive)
+{
+ idetape_tape_t *tape = drive->driver_data;
+ struct ide_atapi_pc pc;
+
+ idetape_create_mode_sense_cmd(&pc, IDETAPE_BLOCK_DESCRIPTOR);
+ if (ide_queue_pc_tail(drive, tape->disk, &pc)) {
+ printk(KERN_ERR "ide-tape: Can't get block descriptor\n");
+ if (tape->blk_size == 0) {
+ printk(KERN_WARNING "ide-tape: Cannot deal with zero "
+ "block size, assuming 32k\n");
+ tape->blk_size = 32768;
+ }
+ return;
+ }
+ tape->blk_size = (pc.buf[4 + 5] << 16) +
+ (pc.buf[4 + 6] << 8) +
+ pc.buf[4 + 7];
+ tape->drv_write_prot = (pc.buf[2] & 0x80) >> 7;
+}
+
+static int idetape_chrdev_open(struct inode *inode, struct file *filp)
{
unsigned int minor = iminor(inode), i = minor & ~0xc0;
ide_drive_t *drive;
idetape_tape_t *tape;
- idetape_pc_t pc;
int retval;
+ if (i >= MAX_HWIFS * MAX_DRIVES)
+ return -ENXIO;
+
+ lock_kernel();
+ tape = ide_tape_chrdev_get(i);
+ if (!tape) {
+ unlock_kernel();
+ return -ENXIO;
+ }
+
+ debug_log(DBG_CHRDEV, "Enter %s\n", __func__);
+
/*
* We really want to do nonseekable_open(inode, filp); here, but some
* versions of tar incorrectly call lseek on tapes and bail out if that
*/
filp->f_mode &= ~(FMODE_PREAD | FMODE_PWRITE);
-#if IDETAPE_DEBUG_LOG
- printk(KERN_INFO "ide-tape: Reached idetape_chrdev_open\n");
-#endif /* IDETAPE_DEBUG_LOG */
-
- if (i >= MAX_HWIFS * MAX_DRIVES)
- return -ENXIO;
-
- if (!(tape = ide_tape_chrdev_get(i)))
- return -ENXIO;
-
drive = tape->drive;
filp->private_data = tape;
- if (test_and_set_bit(IDETAPE_BUSY, &tape->flags)) {
+ if (test_and_set_bit(IDE_AFLAG_BUSY, &drive->atapi_flags)) {
retval = -EBUSY;
goto out_put_tape;
}
retval = idetape_wait_ready(drive, 60 * HZ);
if (retval) {
- clear_bit(IDETAPE_BUSY, &tape->flags);
+ clear_bit(IDE_AFLAG_BUSY, &drive->atapi_flags);
printk(KERN_ERR "ide-tape: %s: drive not ready\n", tape->name);
goto out_put_tape;
}
idetape_read_position(drive);
- if (!test_bit(IDETAPE_ADDRESS_VALID, &tape->flags))
+ if (!test_bit(IDE_AFLAG_ADDRESS_VALID, &drive->atapi_flags))
(void)idetape_rewind_tape(drive);
- if (tape->chrdev_direction != idetape_direction_read)
- clear_bit(IDETAPE_PIPELINE_ERROR, &tape->flags);
-
/* Read block size and write protect status from drive. */
- idetape_get_blocksize_from_block_descriptor(drive);
+ ide_tape_get_bsize_from_bdesc(drive);
/* Set write protect flag if device is opened as read-only. */
if ((filp->f_flags & O_ACCMODE) == O_RDONLY)
if (tape->write_prot) {
if ((filp->f_flags & O_ACCMODE) == O_WRONLY ||
(filp->f_flags & O_ACCMODE) == O_RDWR) {
- clear_bit(IDETAPE_BUSY, &tape->flags);
+ clear_bit(IDE_AFLAG_BUSY, &drive->atapi_flags);
retval = -EROFS;
goto out_put_tape;
}
}
- /*
- * Lock the tape drive door so user can't eject.
- */
- if (tape->chrdev_direction == idetape_direction_none) {
- if (idetape_create_prevent_cmd(drive, &pc, 1)) {
- if (!idetape_queue_pc_tail(drive, &pc)) {
- if (tape->door_locked != DOOR_EXPLICITLY_LOCKED)
- tape->door_locked = DOOR_LOCKED;
- }
+ /* Lock the tape drive door so user can't eject. */
+ if (tape->chrdev_dir == IDETAPE_DIR_NONE) {
+ if (!ide_set_media_lock(drive, tape->disk, 1)) {
+ if (tape->door_locked != DOOR_EXPLICITLY_LOCKED)
+ tape->door_locked = DOOR_LOCKED;
}
}
- idetape_restart_speed_control(drive);
- tape->restart_speed_control_req = 0;
+ unlock_kernel();
return 0;
out_put_tape:
ide_tape_put(tape);
+ unlock_kernel();
return retval;
}
-static void idetape_write_release (ide_drive_t *drive, unsigned int minor)
+static void idetape_write_release(ide_drive_t *drive, unsigned int minor)
{
idetape_tape_t *tape = drive->driver_data;
- idetape_empty_write_pipeline(drive);
- tape->merge_stage = __idetape_kmalloc_stage(tape, 1, 0);
- if (tape->merge_stage != NULL) {
- idetape_pad_zeros(drive, tape->tape_block_size * (tape->user_bs_factor - 1));
- __idetape_kfree_stage(tape->merge_stage);
- tape->merge_stage = NULL;
+ ide_tape_flush_merge_buffer(drive);
+ tape->merge_bh = ide_tape_kmalloc_buffer(tape, 1, 0);
+ if (tape->merge_bh != NULL) {
+ idetape_pad_zeros(drive, tape->blk_size *
+ (tape->user_bs_factor - 1));
+ ide_tape_kfree_buffer(tape);
+ tape->merge_bh = NULL;
}
idetape_write_filemark(drive);
idetape_flush_tape_buffers(drive);
idetape_flush_tape_buffers(drive);
}
-/*
- * Our character device release function.
- */
-static int idetape_chrdev_release (struct inode *inode, struct file *filp)
+static int idetape_chrdev_release(struct inode *inode, struct file *filp)
{
- struct ide_tape_obj *tape = ide_tape_f(filp);
+ struct ide_tape_obj *tape = filp->private_data;
ide_drive_t *drive = tape->drive;
- idetape_pc_t pc;
unsigned int minor = iminor(inode);
lock_kernel();
tape = drive->driver_data;
-#if IDETAPE_DEBUG_LOG
- if (tape->debug_level >= 3)
- printk(KERN_INFO "ide-tape: Reached idetape_chrdev_release\n");
-#endif /* IDETAPE_DEBUG_LOG */
- if (tape->chrdev_direction == idetape_direction_write)
+ debug_log(DBG_CHRDEV, "Enter %s\n", __func__);
+
+ if (tape->chrdev_dir == IDETAPE_DIR_WRITE)
idetape_write_release(drive, minor);
- if (tape->chrdev_direction == idetape_direction_read) {
+ if (tape->chrdev_dir == IDETAPE_DIR_READ) {
if (minor < 128)
- idetape_discard_read_pipeline(drive, 1);
- else
- idetape_wait_for_pipeline(drive);
- }
- if (tape->cache_stage != NULL) {
- __idetape_kfree_stage(tape->cache_stage);
- tape->cache_stage = NULL;
+ ide_tape_discard_merge_buffer(drive, 1);
}
- if (minor < 128 && test_bit(IDETAPE_MEDIUM_PRESENT, &tape->flags))
+
+ if (minor < 128 && test_bit(IDE_AFLAG_MEDIUM_PRESENT, &drive->atapi_flags))
(void) idetape_rewind_tape(drive);
- if (tape->chrdev_direction == idetape_direction_none) {
+ if (tape->chrdev_dir == IDETAPE_DIR_NONE) {
if (tape->door_locked == DOOR_LOCKED) {
- if (idetape_create_prevent_cmd(drive, &pc, 0)) {
- if (!idetape_queue_pc_tail(drive, &pc))
- tape->door_locked = DOOR_UNLOCKED;
- }
+ if (!ide_set_media_lock(drive, tape->disk, 0))
+ tape->door_locked = DOOR_UNLOCKED;
}
}
- clear_bit(IDETAPE_BUSY, &tape->flags);
+ clear_bit(IDE_AFLAG_BUSY, &drive->atapi_flags);
ide_tape_put(tape);
unlock_kernel();
return 0;
}
-/*
- * idetape_identify_device is called to check the contents of the
- * ATAPI IDENTIFY command results. We return:
- *
- * 1 If the tape can be supported by us, based on the information
- * we have so far.
- *
- * 0 If this tape driver is not currently supported by us.
- */
-static int idetape_identify_device (ide_drive_t *drive)
-{
- struct idetape_id_gcw gcw;
- struct hd_driveid *id = drive->id;
-#if IDETAPE_DEBUG_INFO
- unsigned short mask,i;
-#endif /* IDETAPE_DEBUG_INFO */
-
- if (drive->id_read == 0)
- return 1;
-
- *((unsigned short *) &gcw) = id->config;
-
-#if IDETAPE_DEBUG_INFO
- printk(KERN_INFO "ide-tape: Dumping ATAPI Identify Device tape parameters\n");
- printk(KERN_INFO "ide-tape: Protocol Type: ");
- switch (gcw.protocol) {
- case 0: case 1: printk("ATA\n");break;
- case 2: printk("ATAPI\n");break;
- case 3: printk("Reserved (Unknown to ide-tape)\n");break;
- }
- printk(KERN_INFO "ide-tape: Device Type: %x - ",gcw.device_type);
- switch (gcw.device_type) {
- case 0: printk("Direct-access Device\n");break;
- case 1: printk("Streaming Tape Device\n");break;
- case 2: case 3: case 4: printk("Reserved\n");break;
- case 5: printk("CD-ROM Device\n");break;
- case 6: printk("Reserved\n");
- case 7: printk("Optical memory Device\n");break;
- case 0x1f: printk("Unknown or no Device type\n");break;
- default: printk("Reserved\n");
- }
- printk(KERN_INFO "ide-tape: Removable: %s",gcw.removable ? "Yes\n":"No\n");
- printk(KERN_INFO "ide-tape: Command Packet DRQ Type: ");
- switch (gcw.drq_type) {
- case 0: printk("Microprocessor DRQ\n");break;
- case 1: printk("Interrupt DRQ\n");break;
- case 2: printk("Accelerated DRQ\n");break;
- case 3: printk("Reserved\n");break;
- }
- printk(KERN_INFO "ide-tape: Command Packet Size: ");
- switch (gcw.packet_size) {
- case 0: printk("12 bytes\n");break;
- case 1: printk("16 bytes\n");break;
- default: printk("Reserved\n");break;
- }
- printk(KERN_INFO "ide-tape: Model: %.40s\n",id->model);
- printk(KERN_INFO "ide-tape: Firmware Revision: %.8s\n",id->fw_rev);
- printk(KERN_INFO "ide-tape: Serial Number: %.20s\n",id->serial_no);
- printk(KERN_INFO "ide-tape: Write buffer size: %d bytes\n",id->buf_size*512);
- printk(KERN_INFO "ide-tape: DMA: %s",id->capability & 0x01 ? "Yes\n":"No\n");
- printk(KERN_INFO "ide-tape: LBA: %s",id->capability & 0x02 ? "Yes\n":"No\n");
- printk(KERN_INFO "ide-tape: IORDY can be disabled: %s",id->capability & 0x04 ? "Yes\n":"No\n");
- printk(KERN_INFO "ide-tape: IORDY supported: %s",id->capability & 0x08 ? "Yes\n":"Unknown\n");
- printk(KERN_INFO "ide-tape: ATAPI overlap supported: %s",id->capability & 0x20 ? "Yes\n":"No\n");
- printk(KERN_INFO "ide-tape: PIO Cycle Timing Category: %d\n",id->tPIO);
- printk(KERN_INFO "ide-tape: DMA Cycle Timing Category: %d\n",id->tDMA);
- printk(KERN_INFO "ide-tape: Single Word DMA supported modes: ");
- for (i=0,mask=1;i<8;i++,mask=mask << 1) {
- if (id->dma_1word & mask)
- printk("%d ",i);
- if (id->dma_1word & (mask << 8))
- printk("(active) ");
- }
- printk("\n");
- printk(KERN_INFO "ide-tape: Multi Word DMA supported modes: ");
- for (i=0,mask=1;i<8;i++,mask=mask << 1) {
- if (id->dma_mword & mask)
- printk("%d ",i);
- if (id->dma_mword & (mask << 8))
- printk("(active) ");
- }
- printk("\n");
- if (id->field_valid & 0x0002) {
- printk(KERN_INFO "ide-tape: Enhanced PIO Modes: %s\n",
- id->eide_pio_modes & 1 ? "Mode 3":"None");
- printk(KERN_INFO "ide-tape: Minimum Multi-word DMA cycle per word: ");
- if (id->eide_dma_min == 0)
- printk("Not supported\n");
- else
- printk("%d ns\n",id->eide_dma_min);
-
- printk(KERN_INFO "ide-tape: Manufacturer\'s Recommended Multi-word cycle: ");
- if (id->eide_dma_time == 0)
- printk("Not supported\n");
- else
- printk("%d ns\n",id->eide_dma_time);
-
- printk(KERN_INFO "ide-tape: Minimum PIO cycle without IORDY: ");
- if (id->eide_pio == 0)
- printk("Not supported\n");
- else
- printk("%d ns\n",id->eide_pio);
-
- printk(KERN_INFO "ide-tape: Minimum PIO cycle with IORDY: ");
- if (id->eide_pio_iordy == 0)
- printk("Not supported\n");
- else
- printk("%d ns\n",id->eide_pio_iordy);
-
- } else
- printk(KERN_INFO "ide-tape: According to the device, fields 64-70 are not valid.\n");
-#endif /* IDETAPE_DEBUG_INFO */
-
- /* Check that we can support this device */
-
- if (gcw.protocol !=2 )
- printk(KERN_ERR "ide-tape: Protocol is not ATAPI\n");
- else if (gcw.device_type != 1)
- printk(KERN_ERR "ide-tape: Device type is not set to tape\n");
- else if (!gcw.removable)
- printk(KERN_ERR "ide-tape: The removable flag is not set\n");
- else if (gcw.packet_size != 0) {
- printk(KERN_ERR "ide-tape: Packet size is not 12 bytes long\n");
- if (gcw.packet_size == 1)
- printk(KERN_ERR "ide-tape: Sorry, padding to 16 bytes is still not supported\n");
- } else
- return 1;
- return 0;
-}
-
-/*
- * Use INQUIRY to get the firmware revision
- */
-static void idetape_get_inquiry_results (ide_drive_t *drive)
+static void idetape_get_inquiry_results(ide_drive_t *drive)
{
- char *r;
idetape_tape_t *tape = drive->driver_data;
- idetape_pc_t pc;
- idetape_inquiry_result_t *inquiry;
-
+ struct ide_atapi_pc pc;
+ char fw_rev[4], vendor_id[8], product_id[16];
+
idetape_create_inquiry_cmd(&pc);
- if (idetape_queue_pc_tail(drive, &pc)) {
- printk(KERN_ERR "ide-tape: %s: can't get INQUIRY results\n", tape->name);
+ if (ide_queue_pc_tail(drive, tape->disk, &pc)) {
+ printk(KERN_ERR "ide-tape: %s: can't get INQUIRY results\n",
+ tape->name);
return;
}
- inquiry = (idetape_inquiry_result_t *) pc.buffer;
- memcpy(tape->vendor_id, inquiry->vendor_id, 8);
- memcpy(tape->product_id, inquiry->product_id, 16);
- memcpy(tape->firmware_revision, inquiry->revision_level, 4);
- ide_fixstring(tape->vendor_id, 10, 0);
- ide_fixstring(tape->product_id, 18, 0);
- ide_fixstring(tape->firmware_revision, 6, 0);
- r = tape->firmware_revision;
- if (*(r + 1) == '.')
- tape->firmware_revision_num = (*r - '0') * 100 + (*(r + 2) - '0') * 10 + *(r + 3) - '0';
- printk(KERN_INFO "ide-tape: %s <-> %s: %s %s rev %s\n", drive->name, tape->name, tape->vendor_id, tape->product_id, tape->firmware_revision);
+ memcpy(vendor_id, &pc.buf[8], 8);
+ memcpy(product_id, &pc.buf[16], 16);
+ memcpy(fw_rev, &pc.buf[32], 4);
+
+ ide_fixstring(vendor_id, 8, 0);
+ ide_fixstring(product_id, 16, 0);
+ ide_fixstring(fw_rev, 4, 0);
+
+ printk(KERN_INFO "ide-tape: %s <-> %s: %.8s %.16s rev %.4s\n",
+ drive->name, tape->name, vendor_id, product_id, fw_rev);
}
/*
- * idetape_get_mode_sense_results asks the tape about its various
- * parameters. In particular, we will adjust our data transfer buffer
- * size to the recommended value as returned by the tape.
+ * Ask the tape about its various parameters. In particular, we will adjust our
+ * data transfer buffer size to the recommended value as returned by the tape.
*/
-static void idetape_get_mode_sense_results (ide_drive_t *drive)
+static void idetape_get_mode_sense_results(ide_drive_t *drive)
{
idetape_tape_t *tape = drive->driver_data;
- idetape_pc_t pc;
- idetape_mode_parameter_header_t *header;
- idetape_capabilities_page_t *capabilities;
-
+ struct ide_atapi_pc pc;
+ u8 *caps;
+ u8 speed, max_speed;
+
idetape_create_mode_sense_cmd(&pc, IDETAPE_CAPABILITIES_PAGE);
- if (idetape_queue_pc_tail(drive, &pc)) {
- printk(KERN_ERR "ide-tape: Can't get tape parameters - assuming some default values\n");
- tape->tape_block_size = 512;
- tape->capabilities.ctl = 52;
- tape->capabilities.speed = 450;
- tape->capabilities.buffer_size = 6 * 52;
+ if (ide_queue_pc_tail(drive, tape->disk, &pc)) {
+ printk(KERN_ERR "ide-tape: Can't get tape parameters - assuming"
+ " some default values\n");
+ tape->blk_size = 512;
+ put_unaligned(52, (u16 *)&tape->caps[12]);
+ put_unaligned(540, (u16 *)&tape->caps[14]);
+ put_unaligned(6*52, (u16 *)&tape->caps[16]);
return;
}
- header = (idetape_mode_parameter_header_t *) pc.buffer;
- capabilities = (idetape_capabilities_page_t *) (pc.buffer + sizeof(idetape_mode_parameter_header_t) + header->bdl);
+ caps = pc.buf + 4 + pc.buf[3];
- capabilities->max_speed = ntohs(capabilities->max_speed);
- capabilities->ctl = ntohs(capabilities->ctl);
- capabilities->speed = ntohs(capabilities->speed);
- capabilities->buffer_size = ntohs(capabilities->buffer_size);
+ /* convert to host order and save for later use */
+ speed = be16_to_cpup((__be16 *)&caps[14]);
+ max_speed = be16_to_cpup((__be16 *)&caps[8]);
- if (!capabilities->speed) {
- printk(KERN_INFO "ide-tape: %s: overriding capabilities->speed (assuming 650KB/sec)\n", drive->name);
- capabilities->speed = 650;
+ *(u16 *)&caps[8] = max_speed;
+ *(u16 *)&caps[12] = be16_to_cpup((__be16 *)&caps[12]);
+ *(u16 *)&caps[14] = speed;
+ *(u16 *)&caps[16] = be16_to_cpup((__be16 *)&caps[16]);
+
+ if (!speed) {
+ printk(KERN_INFO "ide-tape: %s: invalid tape speed "
+ "(assuming 650KB/sec)\n", drive->name);
+ *(u16 *)&caps[14] = 650;
}
- if (!capabilities->max_speed) {
- printk(KERN_INFO "ide-tape: %s: overriding capabilities->max_speed (assuming 650KB/sec)\n", drive->name);
- capabilities->max_speed = 650;
+ if (!max_speed) {
+ printk(KERN_INFO "ide-tape: %s: invalid max_speed "
+ "(assuming 650KB/sec)\n", drive->name);
+ *(u16 *)&caps[8] = 650;
}
- tape->capabilities = *capabilities; /* Save us a copy */
- if (capabilities->blk512)
- tape->tape_block_size = 512;
- else if (capabilities->blk1024)
- tape->tape_block_size = 1024;
-
-#if IDETAPE_DEBUG_INFO
- printk(KERN_INFO "ide-tape: Dumping the results of the MODE SENSE packet command\n");
- printk(KERN_INFO "ide-tape: Mode Parameter Header:\n");
- printk(KERN_INFO "ide-tape: Mode Data Length - %d\n",header->mode_data_length);
- printk(KERN_INFO "ide-tape: Medium Type - %d\n",header->medium_type);
- printk(KERN_INFO "ide-tape: Device Specific Parameter - %d\n",header->dsp);
- printk(KERN_INFO "ide-tape: Block Descriptor Length - %d\n",header->bdl);
-
- printk(KERN_INFO "ide-tape: Capabilities and Mechanical Status Page:\n");
- printk(KERN_INFO "ide-tape: Page code - %d\n",capabilities->page_code);
- printk(KERN_INFO "ide-tape: Page length - %d\n",capabilities->page_length);
- printk(KERN_INFO "ide-tape: Read only - %s\n",capabilities->ro ? "Yes":"No");
- printk(KERN_INFO "ide-tape: Supports reverse space - %s\n",capabilities->sprev ? "Yes":"No");
- printk(KERN_INFO "ide-tape: Supports erase initiated formatting - %s\n",capabilities->efmt ? "Yes":"No");
- printk(KERN_INFO "ide-tape: Supports QFA two Partition format - %s\n",capabilities->qfa ? "Yes":"No");
- printk(KERN_INFO "ide-tape: Supports locking the medium - %s\n",capabilities->lock ? "Yes":"No");
- printk(KERN_INFO "ide-tape: The volume is currently locked - %s\n",capabilities->locked ? "Yes":"No");
- printk(KERN_INFO "ide-tape: The device defaults in the prevent state - %s\n",capabilities->prevent ? "Yes":"No");
- printk(KERN_INFO "ide-tape: Supports ejecting the medium - %s\n",capabilities->eject ? "Yes":"No");
- printk(KERN_INFO "ide-tape: Supports error correction - %s\n",capabilities->ecc ? "Yes":"No");
- printk(KERN_INFO "ide-tape: Supports data compression - %s\n",capabilities->cmprs ? "Yes":"No");
- printk(KERN_INFO "ide-tape: Supports 512 bytes block size - %s\n",capabilities->blk512 ? "Yes":"No");
- printk(KERN_INFO "ide-tape: Supports 1024 bytes block size - %s\n",capabilities->blk1024 ? "Yes":"No");
- printk(KERN_INFO "ide-tape: Supports 32768 bytes block size / Restricted byte count for PIO transfers - %s\n",capabilities->blk32768 ? "Yes":"No");
- printk(KERN_INFO "ide-tape: Maximum supported speed in KBps - %d\n",capabilities->max_speed);
- printk(KERN_INFO "ide-tape: Continuous transfer limits in blocks - %d\n",capabilities->ctl);
- printk(KERN_INFO "ide-tape: Current speed in KBps - %d\n",capabilities->speed);
- printk(KERN_INFO "ide-tape: Buffer size - %d\n",capabilities->buffer_size*512);
-#endif /* IDETAPE_DEBUG_INFO */
-}
+ memcpy(&tape->caps, caps, 20);
-/*
- * ide_get_blocksize_from_block_descriptor does a mode sense page 0 with block descriptor
- * and if it succeeds sets the tape block size with the reported value
- */
-static void idetape_get_blocksize_from_block_descriptor(ide_drive_t *drive)
-{
+ /* device lacks locking support according to capabilities page */
+ if ((caps[6] & 1) == 0)
+ drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
- idetape_tape_t *tape = drive->driver_data;
- idetape_pc_t pc;
- idetape_mode_parameter_header_t *header;
- idetape_parameter_block_descriptor_t *block_descrp;
-
- idetape_create_mode_sense_cmd(&pc, IDETAPE_BLOCK_DESCRIPTOR);
- if (idetape_queue_pc_tail(drive, &pc)) {
- printk(KERN_ERR "ide-tape: Can't get block descriptor\n");
- if (tape->tape_block_size == 0) {
- printk(KERN_WARNING "ide-tape: Cannot deal with zero block size, assume 32k\n");
- tape->tape_block_size = 32768;
- }
- return;
- }
- header = (idetape_mode_parameter_header_t *) pc.buffer;
- block_descrp = (idetape_parameter_block_descriptor_t *) (pc.buffer + sizeof(idetape_mode_parameter_header_t));
- tape->tape_block_size =( block_descrp->length[0]<<16) + (block_descrp->length[1]<<8) + block_descrp->length[2];
- tape->drv_write_prot = (header->dsp & 0x80) >> 7;
-
-#if IDETAPE_DEBUG_INFO
- printk(KERN_INFO "ide-tape: Adjusted block size - %d\n", tape->tape_block_size);
-#endif /* IDETAPE_DEBUG_INFO */
+ if (caps[7] & 0x02)
+ tape->blk_size = 512;
+ else if (caps[7] & 0x04)
+ tape->blk_size = 1024;
}
-static void idetape_add_settings (ide_drive_t *drive)
-{
- idetape_tape_t *tape = drive->driver_data;
-/*
- * drive setting name read/write ioctl ioctl data type min max mul_factor div_factor data pointer set function
- */
- ide_add_setting(drive, "buffer", SETTING_READ, -1, -1, TYPE_SHORT, 0, 0xffff, 1, 2, &tape->capabilities.buffer_size, NULL);
- ide_add_setting(drive, "pipeline_min", SETTING_RW, -1, -1, TYPE_INT, 1, 0xffff, tape->stage_size / 1024, 1, &tape->min_pipeline, NULL);
- ide_add_setting(drive, "pipeline", SETTING_RW, -1, -1, TYPE_INT, 1, 0xffff, tape->stage_size / 1024, 1, &tape->max_stages, NULL);
- ide_add_setting(drive, "pipeline_max", SETTING_RW, -1, -1, TYPE_INT, 1, 0xffff, tape->stage_size / 1024, 1, &tape->max_pipeline, NULL);
- ide_add_setting(drive, "pipeline_used",SETTING_READ, -1, -1, TYPE_INT, 0, 0xffff, tape->stage_size / 1024, 1, &tape->nr_stages, NULL);
- ide_add_setting(drive, "pipeline_pending",SETTING_READ,-1, -1, TYPE_INT, 0, 0xffff, tape->stage_size / 1024, 1, &tape->nr_pending_stages, NULL);
- ide_add_setting(drive, "speed", SETTING_READ, -1, -1, TYPE_SHORT, 0, 0xffff, 1, 1, &tape->capabilities.speed, NULL);
- ide_add_setting(drive, "stage", SETTING_READ, -1, -1, TYPE_INT, 0, 0xffff, 1, 1024, &tape->stage_size, NULL);
- ide_add_setting(drive, "tdsc", SETTING_RW, -1, -1, TYPE_INT, IDETAPE_DSC_RW_MIN, IDETAPE_DSC_RW_MAX, 1000, HZ, &tape->best_dsc_rw_frequency, NULL);
- ide_add_setting(drive, "dsc_overlap", SETTING_RW, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->dsc_overlap, NULL);
- ide_add_setting(drive, "pipeline_head_speed_c",SETTING_READ, -1, -1, TYPE_INT, 0, 0xffff, 1, 1, &tape->controlled_pipeline_head_speed, NULL);
- ide_add_setting(drive, "pipeline_head_speed_u",SETTING_READ, -1, -1, TYPE_INT, 0, 0xffff, 1, 1, &tape->uncontrolled_pipeline_head_speed, NULL);
- ide_add_setting(drive, "avg_speed", SETTING_READ, -1, -1, TYPE_INT, 0, 0xffff, 1, 1, &tape->avg_speed, NULL);
- ide_add_setting(drive, "debug_level",SETTING_RW, -1, -1, TYPE_INT, 0, 0xffff, 1, 1, &tape->debug_level, NULL);
+#ifdef CONFIG_IDE_PROC_FS
+#define ide_tape_devset_get(name, field) \
+static int get_##name(ide_drive_t *drive) \
+{ \
+ idetape_tape_t *tape = drive->driver_data; \
+ return tape->field; \
+}
+
+#define ide_tape_devset_set(name, field) \
+static int set_##name(ide_drive_t *drive, int arg) \
+{ \
+ idetape_tape_t *tape = drive->driver_data; \
+ tape->field = arg; \
+ return 0; \
}
+#define ide_tape_devset_rw_field(_name, _field) \
+ide_tape_devset_get(_name, _field) \
+ide_tape_devset_set(_name, _field) \
+IDE_DEVSET(_name, DS_SYNC, get_##_name, set_##_name)
+
+#define ide_tape_devset_r_field(_name, _field) \
+ide_tape_devset_get(_name, _field) \
+IDE_DEVSET(_name, 0, get_##_name, NULL)
+
+static int mulf_tdsc(ide_drive_t *drive) { return 1000; }
+static int divf_tdsc(ide_drive_t *drive) { return HZ; }
+static int divf_buffer(ide_drive_t *drive) { return 2; }
+static int divf_buffer_size(ide_drive_t *drive) { return 1024; }
+
+ide_devset_rw_flag(dsc_overlap, IDE_DFLAG_DSC_OVERLAP);
+
+ide_tape_devset_rw_field(debug_mask, debug_mask);
+ide_tape_devset_rw_field(tdsc, best_dsc_rw_freq);
+
+ide_tape_devset_r_field(avg_speed, avg_speed);
+ide_tape_devset_r_field(speed, caps[14]);
+ide_tape_devset_r_field(buffer, caps[16]);
+ide_tape_devset_r_field(buffer_size, buffer_size);
+
+static const struct ide_proc_devset idetape_settings[] = {
+ __IDE_PROC_DEVSET(avg_speed, 0, 0xffff, NULL, NULL),
+ __IDE_PROC_DEVSET(buffer, 0, 0xffff, NULL, divf_buffer),
+ __IDE_PROC_DEVSET(buffer_size, 0, 0xffff, NULL, divf_buffer_size),
+ __IDE_PROC_DEVSET(debug_mask, 0, 0xffff, NULL, NULL),
+ __IDE_PROC_DEVSET(dsc_overlap, 0, 1, NULL, NULL),
+ __IDE_PROC_DEVSET(speed, 0, 0xffff, NULL, NULL),
+ __IDE_PROC_DEVSET(tdsc, IDETAPE_DSC_RW_MIN, IDETAPE_DSC_RW_MAX,
+ mulf_tdsc, divf_tdsc),
+ { NULL },
+};
+#endif
+
/*
- * ide_setup is called to:
+ * The function below is called to:
*
- * 1. Initialize our various state variables.
- * 2. Ask the tape for its capabilities.
- * 3. Allocate a buffer which will be used for data
- * transfer. The buffer size is chosen based on
- * the recommendation which we received in step (2).
+ * 1. Initialize our various state variables.
+ * 2. Ask the tape for its capabilities.
+ * 3. Allocate a buffer which will be used for data transfer. The buffer size
+ * is chosen based on the recommendation which we received in step 2.
*
- * Note that at this point ide.c already assigned us an irq, so that
- * we can queue requests here and wait for their completion.
+ * Note that at this point ide.c already assigned us an irq, so that we can
+ * queue requests here and wait for their completion.
*/
-static void idetape_setup (ide_drive_t *drive, idetape_tape_t *tape, int minor)
+static void idetape_setup(ide_drive_t *drive, idetape_tape_t *tape, int minor)
{
- unsigned long t1, tmid, tn, t;
+ unsigned long t;
int speed;
- struct idetape_id_gcw gcw;
- int stage_size;
- struct sysinfo si;
-
- spin_lock_init(&tape->spinlock);
- drive->dsc_overlap = 1;
-#ifdef CONFIG_BLK_DEV_IDEPCI
- if (HWIF(drive)->pci_dev != NULL) {
- /*
- * These two ide-pci host adapters appear to need DSC overlap disabled.
- * This probably needs further analysis.
- */
- if ((HWIF(drive)->pci_dev->device == PCI_DEVICE_ID_ARTOP_ATP850UF) ||
- (HWIF(drive)->pci_dev->device == PCI_DEVICE_ID_TTI_HPT343)) {
- printk(KERN_INFO "ide-tape: %s: disabling DSC overlap\n", tape->name);
- drive->dsc_overlap = 0;
- }
+ int buffer_size;
+ u16 *ctl = (u16 *)&tape->caps[12];
+
+ drive->pc_callback = ide_tape_callback;
+ drive->pc_update_buffers = idetape_update_buffers;
+ drive->pc_io_buffers = ide_tape_io_buffers;
+
+ spin_lock_init(&tape->lock);
+
+ drive->dev_flags |= IDE_DFLAG_DSC_OVERLAP;
+
+ if (drive->hwif->host_flags & IDE_HFLAG_NO_DSC) {
+ printk(KERN_INFO "ide-tape: %s: disabling DSC overlap\n",
+ tape->name);
+ drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP;
}
-#endif /* CONFIG_BLK_DEV_IDEPCI */
+
/* Seagate Travan drives do not support DSC overlap. */
- if (strstr(drive->id->model, "Seagate STT3401"))
- drive->dsc_overlap = 0;
+ if (strstr((char *)&drive->id[ATA_ID_PROD], "Seagate STT3401"))
+ drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP;
+
tape->minor = minor;
tape->name[0] = 'h';
tape->name[1] = 't';
tape->name[2] = '0' + minor;
- tape->chrdev_direction = idetape_direction_none;
- tape->pc = tape->pc_stack;
- tape->max_insert_speed = 10000;
- tape->speed_control = 1;
- *((unsigned short *) &gcw) = drive->id->config;
- if (gcw.drq_type == 1)
- set_bit(IDETAPE_DRQ_INTERRUPT, &tape->flags);
-
- tape->min_pipeline = tape->max_pipeline = tape->max_stages = 10;
-
+ tape->chrdev_dir = IDETAPE_DIR_NONE;
+
idetape_get_inquiry_results(drive);
idetape_get_mode_sense_results(drive);
- idetape_get_blocksize_from_block_descriptor(drive);
+ ide_tape_get_bsize_from_bdesc(drive);
tape->user_bs_factor = 1;
- tape->stage_size = tape->capabilities.ctl * tape->tape_block_size;
- while (tape->stage_size > 0xffff) {
+ tape->buffer_size = *ctl * tape->blk_size;
+ while (tape->buffer_size > 0xffff) {
printk(KERN_NOTICE "ide-tape: decreasing stage size\n");
- tape->capabilities.ctl /= 2;
- tape->stage_size = tape->capabilities.ctl * tape->tape_block_size;
+ *ctl /= 2;
+ tape->buffer_size = *ctl * tape->blk_size;
}
- stage_size = tape->stage_size;
- tape->pages_per_stage = stage_size / PAGE_SIZE;
- if (stage_size % PAGE_SIZE) {
- tape->pages_per_stage++;
- tape->excess_bh_size = PAGE_SIZE - stage_size % PAGE_SIZE;
+ buffer_size = tape->buffer_size;
+ tape->pages_per_buffer = buffer_size / PAGE_SIZE;
+ if (buffer_size % PAGE_SIZE) {
+ tape->pages_per_buffer++;
+ tape->excess_bh_size = PAGE_SIZE - buffer_size % PAGE_SIZE;
}
- /*
- * Select the "best" DSC read/write polling frequency
- * and pipeline size.
- */
- speed = max(tape->capabilities.speed, tape->capabilities.max_speed);
-
- tape->max_stages = speed * 1000 * 10 / tape->stage_size;
+ /* select the "best" DSC read/write polling freq */
+ speed = max(*(u16 *)&tape->caps[14], *(u16 *)&tape->caps[8]);
- /*
- * Limit memory use for pipeline to 10% of physical memory
- */
- si_meminfo(&si);
- if (tape->max_stages * tape->stage_size > si.totalram * si.mem_unit / 10)
- tape->max_stages = si.totalram * si.mem_unit / (10 * tape->stage_size);
- tape->max_stages = min(tape->max_stages, IDETAPE_MAX_PIPELINE_STAGES);
- tape->min_pipeline = min(tape->max_stages, IDETAPE_MIN_PIPELINE_STAGES);
- tape->max_pipeline = min(tape->max_stages * 2, IDETAPE_MAX_PIPELINE_STAGES);
- if (tape->max_stages == 0)
- tape->max_stages = tape->min_pipeline = tape->max_pipeline = 1;
-
- t1 = (tape->stage_size * HZ) / (speed * 1000);
- tmid = (tape->capabilities.buffer_size * 32 * HZ) / (speed * 125);
- tn = (IDETAPE_FIFO_THRESHOLD * tape->stage_size * HZ) / (speed * 1000);
-
- if (tape->max_stages)
- t = tn;
- else
- t = t1;
+ t = (IDETAPE_FIFO_THRESHOLD * tape->buffer_size * HZ) / (speed * 1000);
/*
- * Ensure that the number we got makes sense; limit
- * it within IDETAPE_DSC_RW_MIN and IDETAPE_DSC_RW_MAX.
+ * Ensure that the number we got makes sense; limit it within
+ * IDETAPE_DSC_RW_MIN and IDETAPE_DSC_RW_MAX.
*/
- tape->best_dsc_rw_frequency = max_t(unsigned long, min_t(unsigned long, t, IDETAPE_DSC_RW_MAX), IDETAPE_DSC_RW_MIN);
+ tape->best_dsc_rw_freq = clamp_t(unsigned long, t, IDETAPE_DSC_RW_MIN,
+ IDETAPE_DSC_RW_MAX);
printk(KERN_INFO "ide-tape: %s <-> %s: %dKBps, %d*%dkB buffer, "
- "%dkB pipeline, %lums tDSC%s\n",
- drive->name, tape->name, tape->capabilities.speed,
- (tape->capabilities.buffer_size * 512) / tape->stage_size,
- tape->stage_size / 1024,
- tape->max_stages * tape->stage_size / 1024,
- tape->best_dsc_rw_frequency * 1000 / HZ,
- drive->using_dma ? ", DMA":"");
-
- idetape_add_settings(drive);
+ "%lums tDSC%s\n",
+ drive->name, tape->name, *(u16 *)&tape->caps[14],
+ (*(u16 *)&tape->caps[16] * 512) / tape->buffer_size,
+ tape->buffer_size / 1024,
+ tape->best_dsc_rw_freq * 1000 / HZ,
+ (drive->dev_flags & IDE_DFLAG_USING_DMA) ? ", DMA" : "");
+
+ ide_proc_register_driver(drive, tape->driver);
}
static void ide_tape_remove(ide_drive_t *drive)
{
idetape_tape_t *tape = drive->driver_data;
- ide_unregister_subdriver(drive, tape->driver);
-
+ ide_proc_unregister_driver(drive, tape->driver);
+ device_del(&tape->dev);
ide_unregister_region(tape->disk);
- ide_tape_put(tape);
+ mutex_lock(&idetape_ref_mutex);
+ put_device(&tape->dev);
+ mutex_unlock(&idetape_ref_mutex);
}
-static void ide_tape_release(struct kref *kref)
+static void ide_tape_release(struct device *dev)
{
- struct ide_tape_obj *tape = to_ide_tape(kref);
+ struct ide_tape_obj *tape = to_ide_drv(dev, ide_tape_obj);
ide_drive_t *drive = tape->drive;
struct gendisk *g = tape->disk;
- BUG_ON(tape->first_stage != NULL || tape->merge_stage_size);
+ BUG_ON(tape->merge_bh_size);
- drive->dsc_overlap = 0;
+ drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP;
drive->driver_data = NULL;
- class_device_destroy(idetape_sysfs_class,
- MKDEV(IDETAPE_MAJOR, tape->minor));
- class_device_destroy(idetape_sysfs_class,
+ device_destroy(idetape_sysfs_class, MKDEV(IDETAPE_MAJOR, tape->minor));
+ device_destroy(idetape_sysfs_class,
MKDEV(IDETAPE_MAJOR, tape->minor + 128));
idetape_devs[tape->minor] = NULL;
g->private_data = NULL;
kfree(tape);
}
-#ifdef CONFIG_PROC_FS
-
+#ifdef CONFIG_IDE_PROC_FS
static int proc_idetape_read_name
(char *page, char **start, off_t off, int count, int *eof, void *data)
{
{ NULL, 0, NULL, NULL }
};
-#else
-
-#define idetape_proc NULL
+static ide_proc_entry_t *ide_tape_proc_entries(ide_drive_t *drive)
+{
+ return idetape_proc;
+}
+static const struct ide_proc_devset *ide_tape_proc_devsets(ide_drive_t *drive)
+{
+ return idetape_settings;
+}
#endif
static int ide_tape_probe(ide_drive_t *);
-static ide_driver_t idetape_driver = {
+static struct ide_driver idetape_driver = {
.gen_driver = {
.owner = THIS_MODULE,
.name = "ide-tape",
.probe = ide_tape_probe,
.remove = ide_tape_remove,
.version = IDETAPE_VERSION,
- .media = ide_tape,
- .supports_dsc_overlap = 1,
.do_request = idetape_do_request,
.end_request = idetape_end_request,
- .error = __ide_error,
- .abort = __ide_abort,
- .proc = idetape_proc,
+#ifdef CONFIG_IDE_PROC_FS
+ .proc_entries = ide_tape_proc_entries,
+ .proc_devsets = ide_tape_proc_devsets,
+#endif
};
-/*
- * Our character device supporting functions, passed to register_chrdev.
- */
+/* Our character device supporting functions, passed to register_chrdev. */
static const struct file_operations idetape_fops = {
.owner = THIS_MODULE,
.read = idetape_chrdev_read,
.release = idetape_chrdev_release,
};
-static int idetape_open(struct inode *inode, struct file *filp)
+static int idetape_open(struct block_device *bdev, fmode_t mode)
{
- struct gendisk *disk = inode->i_bdev->bd_disk;
- struct ide_tape_obj *tape;
+ struct ide_tape_obj *tape = ide_tape_get(bdev->bd_disk);
- if (!(tape = ide_tape_get(disk)))
+ if (!tape)
return -ENXIO;
return 0;
}
-static int idetape_release(struct inode *inode, struct file *filp)
+static int idetape_release(struct gendisk *disk, fmode_t mode)
{
- struct gendisk *disk = inode->i_bdev->bd_disk;
- struct ide_tape_obj *tape = ide_tape_g(disk);
+ struct ide_tape_obj *tape = ide_drv_g(disk, ide_tape_obj);
ide_tape_put(tape);
-
return 0;
}
-static int idetape_ioctl(struct inode *inode, struct file *file,
+static int idetape_ioctl(struct block_device *bdev, fmode_t mode,
unsigned int cmd, unsigned long arg)
{
- struct block_device *bdev = inode->i_bdev;
- struct ide_tape_obj *tape = ide_tape_g(bdev->bd_disk);
+ struct ide_tape_obj *tape = ide_drv_g(bdev->bd_disk, ide_tape_obj);
ide_drive_t *drive = tape->drive;
- int err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
+ int err = generic_ide_ioctl(drive, bdev, cmd, arg);
if (err == -EINVAL)
err = idetape_blkdev_ioctl(drive, cmd, arg);
return err;
.owner = THIS_MODULE,
.open = idetape_open,
.release = idetape_release,
- .ioctl = idetape_ioctl,
+ .locked_ioctl = idetape_ioctl,
};
static int ide_tape_probe(ide_drive_t *drive)
if (!strstr("ide-tape", drive->driver_req))
goto failed;
- if (!drive->present)
- goto failed;
+
if (drive->media != ide_tape)
goto failed;
- if (!idetape_identify_device (drive)) {
- printk(KERN_ERR "ide-tape: %s: not supported by this version of ide-tape\n", drive->name);
- goto failed;
- }
- if (drive->scsi) {
- printk("ide-tape: passing drive %s to ide-scsi emulation.\n", drive->name);
+
+ if ((drive->dev_flags & IDE_DFLAG_ID_READ) &&
+ ide_check_atapi_device(drive, DRV_NAME) == 0) {
+ printk(KERN_ERR "ide-tape: %s: not supported by this version of"
+ " the driver\n", drive->name);
goto failed;
}
- if (strstr(drive->id->model, "OnStream DI-")) {
- printk(KERN_WARNING "ide-tape: Use drive %s with ide-scsi emulation and osst.\n", drive->name);
- printk(KERN_WARNING "ide-tape: OnStream support will be removed soon from ide-tape!\n");
- }
- tape = kzalloc(sizeof (idetape_tape_t), GFP_KERNEL);
+ tape = kzalloc(sizeof(idetape_tape_t), GFP_KERNEL);
if (tape == NULL) {
- printk(KERN_ERR "ide-tape: %s: Can't allocate a tape structure\n", drive->name);
+ printk(KERN_ERR "ide-tape: %s: Can't allocate a tape struct\n",
+ drive->name);
goto failed;
}
ide_init_disk(g, drive);
- ide_register_subdriver(drive, &idetape_driver);
+ tape->dev.parent = &drive->gendev;
+ tape->dev.release = ide_tape_release;
+ dev_set_name(&tape->dev, dev_name(&drive->gendev));
- kref_init(&tape->kref);
+ if (device_register(&tape->dev))
+ goto out_free_disk;
tape->drive = drive;
tape->driver = &idetape_driver;
idetape_setup(drive, tape, minor);
- class_device_create(idetape_sysfs_class, NULL,
- MKDEV(IDETAPE_MAJOR, minor), &drive->gendev, "%s", tape->name);
- class_device_create(idetape_sysfs_class, NULL,
- MKDEV(IDETAPE_MAJOR, minor + 128), &drive->gendev, "n%s", tape->name);
+ device_create(idetape_sysfs_class, &drive->gendev,
+ MKDEV(IDETAPE_MAJOR, minor), NULL, "%s", tape->name);
+ device_create(idetape_sysfs_class, &drive->gendev,
+ MKDEV(IDETAPE_MAJOR, minor + 128), NULL,
+ "n%s", tape->name);
g->fops = &idetape_block_ops;
ide_register_region(g);
return 0;
+out_free_disk:
+ put_disk(g);
out_free_tape:
kfree(tape);
failed:
return -ENODEV;
}
-MODULE_DESCRIPTION("ATAPI Streaming TAPE Driver");
-MODULE_LICENSE("GPL");
-
-static void __exit idetape_exit (void)
+static void __exit idetape_exit(void)
{
driver_unregister(&idetape_driver.gen_driver);
class_destroy(idetape_sysfs_class);
}
if (register_chrdev(IDETAPE_MAJOR, "ht", &idetape_fops)) {
- printk(KERN_ERR "ide-tape: Failed to register character device interface\n");
+ printk(KERN_ERR "ide-tape: Failed to register chrdev"
+ " interface\n");
error = -EBUSY;
goto out_free_class;
}
module_init(idetape_init);
module_exit(idetape_exit);
MODULE_ALIAS_CHARDEV_MAJOR(IDETAPE_MAJOR);
+MODULE_DESCRIPTION("ATAPI Streaming TAPE Driver");
+MODULE_LICENSE("GPL");