patch-2.3.34 linux/drivers/block/ide-tape.c
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- Lines: 4862
- Date:
Tue Dec 14 23:03:50 1999
- Orig file:
v2.3.33/linux/drivers/block/ide-tape.c
- Orig date:
Thu Nov 18 20:25:37 1999
diff -u --recursive --new-file v2.3.33/linux/drivers/block/ide-tape.c linux/drivers/block/ide-tape.c
@@ -1,5 +1,5 @@
/*
- * linux/drivers/block/ide-tape.c Version 1.15 Jul 4, 1999
+ * linux/drivers/block/ide-tape.c Version 1.16e Oct 3, 1999
*
* Copyright (C) 1995 - 1999 Gadi Oxman <gadio@netvision.net.il>
*
@@ -216,7 +216,14 @@
* 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.
- * Fix use of freed memory.
+ * 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.
*
* Here are some words from the first releases of hd.c, which are quoted
* in ide.c and apply here as well:
@@ -326,7 +333,7 @@
* sharing a (fast) ATA-2 disk with any (slow) new ATAPI device.
*/
-#define IDETAPE_VERSION "1.13"
+#define IDETAPE_VERSION "1.16e"
#include <linux/config.h>
#include <linux/module.h>
@@ -352,12 +359,114 @@
#include <asm/bitops.h>
/*
- * For general magnetic tape device compatibility.
+ * OnStream support
*/
+#define ONSTREAM_DEBUG (0)
+#define OS_CONFIG_PARTITION (0xff)
+#define OS_DATA_PARTITION (0)
+#define OS_PARTITION_VERSION (1)
+
+/*
+ * 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;
+
+/*
+ * Frame types
+ */
+#define OS_FRAME_TYPE_FILL (0)
+#define OS_FRAME_TYPE_EOD (1 << 0)
+#define OS_FRAME_TYPE_MARKER (1 << 1)
+#define OS_FRAME_TYPE_HEADER (1 << 3)
+#define OS_FRAME_TYPE_DATA (1 << 7)
+
+/*
+ * AUX
+ */
+typedef struct os_aux_s {
+ __u32 format_id; /* hardware compability AUX is based on */
+ char application_sig[4]; /* driver used to write this media */
+ __u32 hdwr; /* reserved */
+ __u32 update_frame_cntr; /* for configuration frame */
+ __u8 frame_type;
+ __u8 frame_type_reserved;
+ __u8 reserved_18_19[2];
+ os_partition_t partition;
+ __u8 reserved_36_43[8];
+ __u32 frame_seq_num;
+ __u32 logical_blk_num_high;
+ __u32 logical_blk_num;
+ os_dat_t dat;
+ __u8 reserved188_191[4];
+ __u32 filemark_cnt;
+ __u32 phys_fm;
+ __u32 last_mark_addr;
+ __u8 reserved204_223[20];
+
+ /*
+ * __u8 app_specific[32];
+ *
+ * Linux specific fields:
+ */
+ __u32 next_mark_addr; /* when known, points to next marker */
+ __u8 linux_specific[28];
+
+ __u8 reserved_256_511[256];
+} os_aux_t;
+
+typedef struct os_header_s {
+ char ident_str[8];
+ __u8 major_rev;
+ __u8 minor_rev;
+ __u8 reserved10_15[6];
+ __u8 par_num;
+ __u8 reserved1_3[3];
+ os_partition_t partition;
+} os_header_t;
+
+/*
+ * OnStream ADRL frame
+ */
+#define OS_FRAME_SIZE (32 * 1024 + 512)
+#define OS_DATA_SIZE (32 * 1024)
+#define OS_AUX_SIZE (512)
+
#include <linux/mtio.h>
/**************************** Tunable parameters *****************************/
+
/*
* Pipelined mode parameters.
*
@@ -372,36 +481,13 @@
*
* Setting the following parameter to 0 will disable the pipelined mode.
*/
-#define IDETAPE_MIN_PIPELINE_STAGES 100
-#define IDETAPE_MAX_PIPELINE_STAGES 200
+#define IDETAPE_MIN_PIPELINE_STAGES 200
+#define IDETAPE_MAX_PIPELINE_STAGES 400
#define IDETAPE_INCREASE_STAGES_RATE 20
/*
- * Assuming the tape shares an interface with another device, the default
- * behavior is to service our pending pipeline requests as soon as
- * possible, but to gracefully postpone them in favor of the other device
- * when the tape is busy. This has the potential to maximize our
- * throughput and in the same time, to make efficient use of the IDE bus.
- *
- * Note that when we transfer data to / from the tape, we co-operate with
- * the relatively fast tape buffers and the tape will perform the
- * actual media access in the background, without blocking the IDE
- * bus. This means that as long as the maximum IDE bus throughput is much
- * higher than the sum of our maximum throughput and the maximum
- * throughput of the other device, we should probably leave the default
- * behavior.
- *
- * However, if it is still desired to give the other device a share even
- * in our own (small) bus bandwidth, you can set IDETAPE_LOW_TAPE_PRIORITY
- * to 1. This will let the other device finish *all* its pending requests
- * before we even check if we can service our next pending request.
- */
-#define IDETAPE_LOW_TAPE_PRIORITY 0
-
-/*
* The following are used to debug the driver:
*
- * Setting IDETAPE_INFO_LOG to 1 will log driver vender information.
* 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.
@@ -416,15 +502,9 @@
* is verified to be stable enough. This will make it much more
* esthetic.
*/
-#define IDETAPE_INFO_LOG 0
#define IDETAPE_DEBUG_LOG 0
#define IDETAPE_DEBUG_BUGS 1
-#if IDETAPE_DEBUG_LOG
-#undef IDETAPE_INFO_LOG
-#define IDETAPE_INFO_LOG IDETAPE_DEBUG_LOG
-#endif
-
/*
* After each failed packet command we issue a request sense command
* and retry the packet command IDETAPE_MAX_PC_RETRIES times.
@@ -448,6 +528,20 @@
#define IDETAPE_PC_STACK (10 + IDETAPE_MAX_PC_RETRIES)
/*
+ * Some tape drives require a long irq timeout
+ */
+#define IDETAPE_WAIT_CMD (60*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
@@ -479,20 +573,6 @@
*/
/*
- * 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
-
-/*
- * Some tape drives require a long irq timeout
- */
-#define IDETAPE_WAIT_CMD (60*HZ)
-
-/*
* DSC timings.
*/
#define IDETAPE_DSC_RW_MIN 5*HZ/100 /* 50 msec */
@@ -505,6 +585,25 @@
/*************************** 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,
@@ -569,8 +668,9 @@
unsigned blk512 :1; /* Supports 512 bytes block size */
unsigned blk1024 :1; /* Supports 1024 bytes block size */
unsigned reserved7_3_6 :4;
- unsigned slowb :1; /* The device restricts the byte count for PIO */
+ 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 */
@@ -580,15 +680,60 @@
} idetape_capabilities_page_t;
/*
+ * 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;
+
+/*
* A pipeline stage.
*/
typedef struct idetape_stage_s {
struct request rq; /* The corresponding request */
struct buffer_head *bh; /* The data buffers */
struct idetape_stage_s *next; /* Pointer to the next stage */
+ os_aux_t *aux; /* OnStream aux ptr */
} idetape_stage_t;
/*
+ * 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;
+
+
+/*
* 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.
@@ -637,10 +782,12 @@
unsigned long dsc_timeout; /* Maximum waiting time */
/*
- * Position information
+ * Read position information
*/
byte partition;
- unsigned int block_address; /* Current block */
+ unsigned int first_frame_position; /* Current block */
+ unsigned int last_frame_position;
+ unsigned int blocks_in_buffer;
/*
* Last error information
@@ -701,9 +848,109 @@
unsigned int flags; /* Status/Action flags */
spinlock_t spinlock; /* protects the ide-tape queue */
+
+ /*
+ * Measures average tape speed
+ */
+ unsigned long avg_time;
+ int avg_size;
+ int avg_speed;
+
+ idetape_request_sense_result_t sense; /* last sense information */
+
+ char vendor_id[10];
+ char product_id[18];
+ char firmware_revision[6];
+ int firmware_revision_num;
+
+ int door_locked; /* the door is currently locked */
+
+ /*
+ * OnStream flags
+ */
+ int onstream; /* the tape is an OnStream tape */
+ int raw; /* OnStream raw access (32.5KB block size) */
+ int cur_frames; /* current number of frames in internal buffer */
+ int max_frames; /* max number of frames in internal buffer */
+ int logical_blk_num; /* logical block number */
+ __u16 wrt_pass_cntr; /* write pass counter */
+ __u32 update_frame_cntr; /* update frame counter */
+ struct semaphore *sem;
+ int onstream_write_error; /* write error recovery active */
+ int header_ok; /* header frame verified ok */
+ int linux_media; /* reading linux-specifc media */
+ int linux_media_version;
+ char application_sig[5]; /* application signature */
+ int filemark_cnt;
+ int first_mark_addr;
+ int last_mark_addr;
+ int eod_frame_addr;
+ unsigned long cmd_start_time;
+ unsigned long max_cmd_time;
+
+ /*
+ * Optimize the number of "buffer filling"
+ * mode sense commands.
+ */
+ unsigned long last_buffer_fill; /* last time in which we issued fill cmd */
+ int req_buffer_fill; /* buffer fill command requested */
+ int writes_since_buffer_fill;
+ int reads_since_buffer_fill;
+
+ /*
+ * Limit the number of times a request can
+ * be postponed, to avoid an infinite postpone
+ * deadlock.
+ */
+ int postpone_cnt; /* request postpone count limit */
+
+ /*
+ * Measures number of frames:
+ *
+ * 1. written/read to/from the driver pipeline (pipeline_head).
+ * 2. written/read to/from the tape buffers (buffer_head).
+ * 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, controlled_pipeline_head_speed, uncontrolled_pipeline_head_speed;
+ int controlled_last_pipeline_head, uncontrolled_last_pipeline_head;
+ unsigned long uncontrolled_pipeline_head_time, controlled_pipeline_head_time;
+ int controlled_previous_pipeline_head, uncontrolled_previous_pipeline_head;
+ unsigned long controlled_previous_head_time, uncontrolled_previous_head_time;
+ int restart_speed_control_req;
} idetape_tape_t;
/*
+ * 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
@@ -713,6 +960,8 @@
#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 */
/*
* Supported ATAPI tape drives packet commands
@@ -727,9 +976,18 @@
#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
+ */
+#define IDETAPE_RETRIEVE_FAULTY_BLOCK 6
/*
* Some defines for the SPACE command
@@ -768,8 +1026,10 @@
#define IDETAPE_READ_RQ 92
#define IDETAPE_WRITE_RQ 93
#define IDETAPE_ABORTED_WRITE_RQ 94
+#define IDETAPE_ABORTED_READ_RQ 95
+#define IDETAPE_READ_BUFFER_RQ 96
-#define IDETAPE_LAST_RQ 94
+#define IDETAPE_LAST_RQ 96
/*
* A macro which can be used to check if a we support a given
@@ -947,36 +1207,12 @@
} idetape_read_position_result_t;
/*
- * 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;
-
-/*
* 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_CAPABILITIES_PAGE 0x2a
+#define IDETAPE_BLOCK_SIZE_PAGE 0x30
/*
* Mode Parameter Header for the MODE SENSE packet command
@@ -1140,46 +1376,6 @@
#endif /* CONFIG_BLK_DEV_IDEDMA */
/*
- * 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;
-
- tape->postponed_rq = HWGROUP(drive)->rq;
- ide_stall_queue(drive, tape->dsc_polling_frequency);
-}
-
-/*
- * 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)
-{
- ide_init_drive_cmd (rq);
- rq->buffer = (char *) pc;
- rq->cmd = IDETAPE_PC_RQ1;
- (void) ide_do_drive_cmd (drive, rq, ide_preempt);
-}
-
-/*
* 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
@@ -1223,196 +1419,116 @@
}
/*
- * Pipeline related functions
+ * idetape_init_pc initializes a packet command.
*/
-
-static inline int idetape_pipeline_active (idetape_tape_t *tape)
+static void idetape_init_pc (idetape_pc_t *pc)
{
- return tape->active_data_request != NULL;
+ 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_kfree_stage calls kfree to completely free a stage, along with
- * its related buffers.
+ * 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_kfree_stage (idetape_stage_t *stage)
+static void idetape_analyze_error (ide_drive_t *drive,idetape_request_sense_result_t *result)
{
- struct buffer_head *prev_bh, *bh = stage->bh;
- int size;
+ idetape_tape_t *tape = drive->driver_data;
+ idetape_pc_t *pc = tape->failed_pc;
- 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;
- }
+ 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.
+ */
+ 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 */
+
+ if (tape->onstream && result->sense_key == 2 && result->asc == 0x53 && result->ascq == 2) {
+ clear_bit(PC_DMA_ERROR, &pc->flags);
+ ide_stall_queue(drive, HZ / 2);
+ return;
+ }
+#ifdef CONFIG_BLK_DEV_IDEDMA
+
+ /*
+ * 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);
+ }
+#endif /* CONFIG_BLK_DEV_IDEDMA */
+ if (pc->c[0] == IDETAPE_READ_CMD && result->filemark) {
+ pc->error = IDETAPE_ERROR_FILEMARK;
+ set_bit (PC_ABORT, &pc->flags);
+ }
+ if (pc->c[0] == IDETAPE_WRITE_CMD) {
+ if (result->eom || (result->sense_key == 0xd && result->asc == 0x0 && result->ascq == 0x2)) {
+ pc->error = IDETAPE_ERROR_EOD;
+ set_bit (PC_ABORT, &pc->flags);
}
- prev_bh = bh;
- bh = bh->b_reqnext;
- kfree (prev_bh);
}
- kfree (stage);
+ if (pc->c[0] == IDETAPE_READ_CMD || pc->c[0] == IDETAPE_WRITE_CMD) {
+ if (result->sense_key == 8) {
+ pc->error = IDETAPE_ERROR_EOD;
+ set_bit (PC_ABORT, &pc->flags);
+ }
+ if (!test_bit (PC_ABORT, &pc->flags) && (tape->onstream || pc->actually_transferred))
+ pc->retries = IDETAPE_MAX_PC_RETRIES + 1;
+ }
}
-static void idetape_kfree_stage (idetape_tape_t *tape, idetape_stage_t *stage)
+static void idetape_abort_pipeline (ide_drive_t *drive)
{
- if (tape->cache_stage == NULL)
- tape->cache_stage = stage;
- else
- __idetape_kfree_stage (stage);
-}
-
-/*
- * 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.
- *
- * Pipeline stages are optional and are used to increase performance.
- * If we can't allocate them, we'll manage without them.
- */
-static idetape_stage_t *__idetape_kmalloc_stage (idetape_tape_t *tape)
-{
- idetape_stage_t *stage;
- struct buffer_head *prev_bh, *bh;
- int pages = tape->pages_per_stage;
- char *b_data;
-
- if ((stage = (idetape_stage_t *) kmalloc (sizeof (idetape_stage_t),GFP_KERNEL)) == NULL)
- return NULL;
- stage->next = NULL;
-
- bh = stage->bh = (struct buffer_head *) kmalloc (sizeof (struct buffer_head), GFP_KERNEL);
- if (bh == NULL)
- goto abort;
- bh->b_reqnext = NULL;
- if ((bh->b_data = (char *) __get_free_page (GFP_KERNEL)) == NULL)
- goto abort;
- bh->b_size = PAGE_SIZE;
- set_bit (BH_Lock, &bh->b_state);
+ idetape_tape_t *tape = drive->driver_data;
+ idetape_stage_t *stage = tape->next_stage;
- while (--pages) {
- if ((b_data = (char *) __get_free_page (GFP_KERNEL)) == NULL)
- goto abort;
- if (bh->b_data == b_data + PAGE_SIZE && virt_to_bus (bh->b_data) == virt_to_bus (b_data) + PAGE_SIZE) {
- bh->b_size += PAGE_SIZE;
- bh->b_data -= PAGE_SIZE;
- continue;
- }
- if (b_data == bh->b_data + bh->b_size && virt_to_bus (b_data) == virt_to_bus (bh->b_data) + bh->b_size) {
- bh->b_size += PAGE_SIZE;
- continue;
- }
- prev_bh = bh;
- if ((bh = (struct buffer_head *) kmalloc (sizeof (struct buffer_head), GFP_KERNEL)) == NULL) {
- free_page ((unsigned long) b_data);
- goto abort;
- }
- bh->b_reqnext = NULL;
- bh->b_data = b_data;
- bh->b_size = PAGE_SIZE;
- set_bit (BH_Lock, &bh->b_state);
- prev_bh->b_reqnext = bh;
+#if IDETAPE_DEBUG_LOG
+ printk(KERN_INFO "ide-tape: %s: idetape_abort_pipeline called\n", tape->name);
+#endif
+ while (stage) {
+ if (stage->rq.cmd == IDETAPE_WRITE_RQ)
+ stage->rq.cmd = IDETAPE_ABORTED_WRITE_RQ;
+ else if (stage->rq.cmd == IDETAPE_READ_RQ)
+ stage->rq.cmd = IDETAPE_ABORTED_READ_RQ;
+ stage = stage->next;
}
- bh->b_size -= tape->excess_bh_size;
- return stage;
-abort:
- __idetape_kfree_stage (stage);
- return NULL;
}
-static idetape_stage_t *idetape_kmalloc_stage (idetape_tape_t *tape)
+/*
+ * idetape_active_next_stage will declare the next stage as "active".
+ */
+static void idetape_active_next_stage (ide_drive_t *drive)
{
- idetape_stage_t *cache_stage = tape->cache_stage;
+ idetape_tape_t *tape = drive->driver_data;
+ idetape_stage_t *stage=tape->next_stage;
+ struct request *rq = &stage->rq;
#if IDETAPE_DEBUG_LOG
- printk (KERN_INFO "Reached idetape_kmalloc_stage\n");
+ printk (KERN_INFO "Reached idetape_active_next_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);
-}
-
-static void idetape_copy_stage_from_user (idetape_tape_t *tape, idetape_stage_t *stage, const char *buf, int n)
-{
- struct buffer_head *bh = tape->bh;
- int count;
-
- while (n) {
-#if IDETAPE_DEBUG_BUGS
- if (bh == NULL) {
- printk (KERN_ERR "ide-tape: bh == NULL in idetape_copy_stage_from_user\n");
- return;
- }
-#endif /* IDETAPE_DEBUG_BUGS */
- count = IDE_MIN (bh->b_size - atomic_read(&bh->b_count), n);
- copy_from_user (bh->b_data + atomic_read(&bh->b_count), buf, count);
- n -= count; atomic_add(count, &bh->b_count); buf += count;
- if (atomic_read(&bh->b_count) == bh->b_size) {
- bh = bh->b_reqnext;
- if (bh)
- atomic_set(&bh->b_count, 0);
- }
- }
- tape->bh = bh;
-}
-
-static void idetape_copy_stage_to_user (idetape_tape_t *tape, char *buf, idetape_stage_t *stage, int n)
-{
- struct buffer_head *bh = tape->bh;
- int count;
-
- while (n) {
#if IDETAPE_DEBUG_BUGS
- if (bh == NULL) {
- printk (KERN_ERR "ide-tape: bh == NULL in idetape_copy_stage_to_user\n");
- return;
- }
-#endif /* IDETAPE_DEBUG_BUGS */
- count = IDE_MIN (tape->b_count, n);
- copy_to_user (buf, tape->b_data, count);
- n -= count; tape->b_data += count; tape->b_count -= count; buf += count;
- if (!tape->b_count) {
- tape->bh = bh = bh->b_reqnext;
- if (bh) {
- tape->b_data = bh->b_data;
- tape->b_count = atomic_read(&bh->b_count);
- }
- }
- }
-}
-
-static void idetape_init_merge_stage (idetape_tape_t *tape)
-{
- struct buffer_head *bh = tape->merge_stage->bh;
-
- tape->bh = bh;
- if (tape->chrdev_direction == idetape_direction_write)
- atomic_set(&bh->b_count, 0);
- else {
- tape->b_data = bh->b_data;
- tape->b_count = atomic_read(&bh->b_count);
+ if (stage == NULL) {
+ printk (KERN_ERR "ide-tape: bug: Trying to activate a non existing stage\n");
+ return;
}
-}
-
-static void idetape_switch_buffers (idetape_tape_t *tape, idetape_stage_t *stage)
-{
- struct buffer_head *tmp;
+#endif /* IDETAPE_DEBUG_BUGS */
- tmp = stage->bh;
- stage->bh = tape->merge_stage->bh;
- tape->merge_stage->bh = tmp;
- idetape_init_merge_stage (tape);
+ rq->buffer = NULL;
+ rq->bh = stage->bh;
+ tape->active_data_request=rq;
+ tape->active_stage=stage;
+ tape->next_stage=stage->next;
}
/*
@@ -1437,28 +1553,33 @@
}
/*
- * idetape_add_stage_tail adds a new stage at the end of the pipeline.
+ * idetape_kfree_stage calls kfree to completely free a stage, along with
+ * its related buffers.
*/
-static void idetape_add_stage_tail (ide_drive_t *drive,idetape_stage_t *stage)
+static void __idetape_kfree_stage (idetape_stage_t *stage)
{
- idetape_tape_t *tape = drive->driver_data;
- unsigned long flags;
-
-#if IDETAPE_DEBUG_LOG
- printk (KERN_INFO "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);
+ struct buffer_head *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;
+ }
+ }
+ 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);
}
/*
@@ -1499,83 +1620,35 @@
}
/*
- * idetape_active_next_stage will declare the next stage as "active".
+ * idetape_end_request is used to finish servicing a request, and to
+ * insert a pending pipeline request into the main device queue.
*/
-static void idetape_active_next_stage (ide_drive_t *drive)
+static void idetape_end_request (byte uptodate, ide_hwgroup_t *hwgroup)
{
+ ide_drive_t *drive = hwgroup->drive;
+ struct request *rq = hwgroup->rq;
idetape_tape_t *tape = drive->driver_data;
- idetape_stage_t *stage=tape->next_stage;
- struct request *rq = &stage->rq;
+ unsigned long flags;
+ int error;
+ int remove_stage = 0;
+#if ONSTREAM_DEBUG
+ idetape_stage_t *stage;
+ os_aux_t *aux;
+ unsigned char *p;
+#endif
#if IDETAPE_DEBUG_LOG
- printk (KERN_INFO "Reached idetape_active_next_stage\n");
+ printk (KERN_INFO "Reached idetape_end_request\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 */
-
- rq->buffer = NULL;
- rq->bh = stage->bh;
- tape->active_data_request=rq;
- tape->active_stage=stage;
- tape->next_stage=stage->next;
-}
-
-/*
- * 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)) {
- idetape_active_next_stage (drive);
- (void) ide_do_drive_cmd (drive, tape->active_data_request, ide_end);
+ switch (uptodate) {
+ case 0: error = IDETAPE_ERROR_GENERAL; break;
+ case 1: error = 0; break;
+ default: error = uptodate;
}
-}
-
-static void idetape_abort_pipeline (ide_drive_t *drive)
-{
- idetape_tape_t *tape = drive->driver_data;
- idetape_stage_t *stage = tape->next_stage;
-
- while (stage) {
- stage->rq.cmd = IDETAPE_ABORTED_WRITE_RQ;
- stage = stage->next;
- }
-}
-
-/*
- * idetape_end_request is used to finish servicing a request, and to
- * insert a pending pipeline request into the main device queue.
- */
-static void idetape_end_request (byte uptodate, ide_hwgroup_t *hwgroup)
-{
- ide_drive_t *drive = hwgroup->drive;
- struct request *rq = hwgroup->rq;
- idetape_tape_t *tape = drive->driver_data;
- unsigned long flags;
- int error;
- int remove_stage = 0;
-
-#if IDETAPE_DEBUG_LOG
- printk (KERN_INFO "Reached idetape_end_request\n");
-#endif /* IDETAPE_DEBUG_LOG */
-
- switch (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;
+ rq->errors = error;
+ if (error)
+ tape->failed_pc = NULL;
spin_lock_irqsave(&tape->spinlock, flags);
if (tape->active_data_request == rq) { /* The request was a pipelined data transfer request */
@@ -1583,83 +1656,68 @@
tape->active_data_request = NULL;
tape->nr_pending_stages--;
if (rq->cmd == IDETAPE_WRITE_RQ) {
+#if ONSTREAM_DEBUG
+ if (tape->onstream) {
+ stage = tape->first_stage;
+ aux = stage->aux;
+ p = stage->bh->b_data;
+ if (ntohl(aux->logical_blk_num) < 11300 && ntohl(aux->logical_blk_num) > 11100)
+ printk(KERN_INFO "finished writing logical blk %lu (data %x %x %x %x)\n", ntohl(aux->logical_blk_num), *p++, *p++, *p++, *p++);
+ }
+#endif
+ if (tape->onstream && !tape->raw) {
+ if (tape->first_frame_position == 0xba4) {
+#if ONSTREAM_DEBUG
+ printk("ide-tape: %s: skipping over config parition..\n", tape->name);
+#endif
+ tape->onstream_write_error = 2;
+ if (tape->sem)
+ up(tape->sem);
+ }
+ }
+ remove_stage = 1;
if (error) {
set_bit (IDETAPE_PIPELINE_ERROR, &tape->flags);
if (error == IDETAPE_ERROR_EOD)
idetape_abort_pipeline (drive);
+ if (tape->onstream && !tape->raw && error == IDETAPE_ERROR_GENERAL && tape->sense.sense_key == 3) {
+ clear_bit (IDETAPE_PIPELINE_ERROR, &tape->flags);
+ printk(KERN_ERR "ide-tape: %s: write error, enabling error recovery\n", tape->name);
+ tape->onstream_write_error = 1;
+ remove_stage = 0;
+ tape->nr_pending_stages++;
+ tape->next_stage = tape->first_stage;
+ rq->current_nr_sectors = rq->nr_sectors;
+ if (tape->sem)
+ up(tape->sem);
+ }
+ }
+ } else if (rq->cmd == IDETAPE_READ_RQ) {
+ if (error == IDETAPE_ERROR_EOD) {
+ set_bit (IDETAPE_PIPELINE_ERROR, &tape->flags);
+ idetape_abort_pipeline(drive);
}
- remove_stage = 1;
}
- if (tape->next_stage != NULL) {
+ if (tape->next_stage != NULL && !tape->onstream_write_error) {
idetape_active_next_stage (drive);
/*
* Insert the next request into the request queue.
- * The choice of using ide_next or ide_end is now left to the user.
*/
-#if IDETAPE_LOW_TAPE_PRIORITY
(void) ide_do_drive_cmd (drive, tape->active_data_request, ide_end);
-#else
- (void) ide_do_drive_cmd (drive, tape->active_data_request, ide_next);
-#endif /* IDETAPE_LOW_TAPE_PRIORITY */
- } else if (!error)
- idetape_increase_max_pipeline_stages (drive);
+ } else if (!error) {
+ if (!tape->onstream)
+ idetape_increase_max_pipeline_stages (drive);
+ }
}
ide_end_drive_cmd (drive, 0, 0);
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);
}
-/*
- * 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_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.
- */
- 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 */
-
-#ifdef CONFIG_BLK_DEV_IDEDMA
-
- /*
- * 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);
- }
-#endif /* CONFIG_BLK_DEV_IDEDMA */
- if (pc->c[0] == IDETAPE_READ_CMD && result->filemark) {
- pc->error = IDETAPE_ERROR_FILEMARK;
- set_bit (PC_ABORT, &pc->flags);
- }
- if (pc->c[0] == IDETAPE_WRITE_CMD) {
- if (result->eom || (result->sense_key == 0xd && result->asc == 0x0 && result->ascq == 0x2)) {
- pc->error = IDETAPE_ERROR_EOD;
- set_bit (PC_ABORT, &pc->flags);
- }
- }
- if (pc->c[0] == IDETAPE_READ_CMD || pc->c[0] == IDETAPE_WRITE_CMD) {
- if (result->sense_key == 8) {
- pc->error = IDETAPE_ERROR_EOD;
- set_bit (PC_ABORT, &pc->flags);
- }
- if (!test_bit (PC_ABORT, &pc->flags) && pc->actually_transferred)
- pc->retries = IDETAPE_MAX_PC_RETRIES + 1;
- }
-}
-
static ide_startstop_t idetape_request_sense_callback (ide_drive_t *drive)
{
idetape_tape_t *tape = drive->driver_data;
@@ -1677,31 +1735,43 @@
return ide_stopped;
}
-/*
- * 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;
-}
-
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] = 255;
+ pc->c[4] = 20;
pc->request_transfer = 18;
pc->callback = &idetape_request_sense_callback;
}
/*
+ * 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)
+{
+ ide_init_drive_cmd (rq);
+ rq->buffer = (char *) pc;
+ rq->cmd = IDETAPE_PC_RQ1;
+ (void) ide_do_drive_cmd (drive, rq, ide_preempt);
+}
+
+/*
* 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.
@@ -1723,6 +1793,22 @@
}
/*
+ * 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;
+
+#if IDETAPE_DEBUG_LOG
+ printk(KERN_INFO "idetape_postpone_request\n");
+#endif
+ tape->postponed_rq = HWGROUP(drive)->rq;
+ ide_stall_queue(drive, tape->dsc_polling_frequency);
+}
+
+/*
* 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.
@@ -1737,12 +1823,19 @@
idetape_bcount_reg_t bcount;
idetape_ireason_reg_t ireason;
idetape_pc_t *pc=tape->pc;
+
unsigned int temp;
+ unsigned long cmd_time;
+#if SIMULATE_ERRORS
+ static int error_sim_count = 0;
+#endif
#if IDETAPE_DEBUG_LOG
printk (KERN_INFO "ide-tape: Reached idetape_pc_intr interrupt handler\n");
#endif /* IDETAPE_DEBUG_LOG */
+ status.all = GET_STAT(); /* Clear the interrupt */
+
#ifdef CONFIG_BLK_DEV_IDEDMA
if (test_bit (PC_DMA_IN_PROGRESS, &pc->flags)) {
if (HWIF(drive)->dmaproc(ide_dma_end, drive)) {
@@ -1758,7 +1851,7 @@
* information from the DMA engine on most chipsets).
*/
set_bit (PC_DMA_ERROR, &pc->flags);
- } else {
+ } else if (!status.b.check) {
pc->actually_transferred=pc->request_transfer;
idetape_update_buffers (pc);
}
@@ -1768,9 +1861,9 @@
}
#endif /* CONFIG_BLK_DEV_IDEDMA */
- status.all = GET_STAT(); /* Clear the interrupt */
-
if (!status.b.drq) { /* No more interrupts */
+ cmd_time = (jiffies - tape->cmd_start_time) * 1000 / HZ;
+ tape->max_cmd_time = IDE_MAX(cmd_time, tape->max_cmd_time);
#if IDETAPE_DEBUG_LOG
printk (KERN_INFO "Packet command completed, %d bytes transferred\n", pc->actually_transferred);
#endif /* IDETAPE_DEBUG_LOG */
@@ -1778,6 +1871,12 @@
ide__sti(); /* local CPU only */
+#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 */
@@ -1788,10 +1887,13 @@
printk (KERN_ERR "ide-tape: I/O error in request sense command\n");
return ide_do_reset (drive);
}
- return idetape_retry_pc (drive); /* Retry operation */
+#if IDETAPE_DEBUG_LOG
+ printk(KERN_INFO "[cmd %x]: check condition\n", pc->c[0]);
+#endif
+ return idetape_retry_pc (drive); /* Retry operation */
}
pc->error = 0;
- if (test_bit (PC_WAIT_FOR_DSC, &pc->flags) && !status.b.dsc) { /* Media access command */
+ if (!tape->onstream && 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;
@@ -1850,7 +1952,9 @@
}
pc->actually_transferred+=bcount.all; /* Update the current position */
pc->current_position+=bcount.all;
-
+#if IDETAPE_DEBUG_LOG
+ printk(KERN_INFO "[cmd %x] transferred %d bytes on that interrupt\n", pc->c[0], bcount.all);
+#endif
ide_set_handler (drive,&idetape_pc_intr,IDETAPE_WAIT_CMD,NULL); /* And set the interrupt handler again */
return ide_started;
}
@@ -1897,7 +2001,6 @@
* we will handle the next request.
*
*/
-
static ide_startstop_t idetape_transfer_pc(ide_drive_t *drive)
{
idetape_tape_t *tape = drive->driver_data;
@@ -1906,7 +2009,7 @@
int retries = 100;
ide_startstop_t startstop;
- if (ide_wait_stat(&startstop,drive,DRQ_STAT,BUSY_STAT,WAIT_READY)) {
+ 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;
}
@@ -1925,6 +2028,7 @@
printk (KERN_ERR "ide-tape: (IO,CoD) != (0,1) while issuing a packet command\n");
return ide_do_reset (drive);
}
+ tape->cmd_start_time = jiffies;
ide_set_handler(drive, &idetape_pc_intr, IDETAPE_WAIT_CMD, NULL); /* Set the interrupt routine */
atapi_output_bytes (drive,pc->c,12); /* Send the actual packet */
return ide_started;
@@ -1954,8 +2058,12 @@
* example).
*/
if (!test_bit (PC_ABORT, &pc->flags)) {
- printk (KERN_ERR "ide-tape: %s: I/O error, pc = %2x, key = %2x, asc = %2x, ascq = %2x\n",
- tape->name, pc->c[0], tape->sense_key, tape->asc, tape->ascq);
+ if (!(pc->c[0] == 0 && tape->sense_key == 2 && tape->asc == 4 && (tape->ascq == 1 || tape->ascq == 8))) {
+ printk (KERN_ERR "ide-tape: %s: I/O error, pc = %2x, key = %2x, asc = %2x, ascq = %2x\n",
+ tape->name, pc->c[0], tape->sense_key, tape->asc, tape->ascq);
+ if (tape->onstream && pc->c[0] == 8 && tape->sense_key == 3 && tape->asc == 11)
+ printk(KERN_ERR "ide-tape: %s: enabling read error recovery\n", tape->name);
+ }
pc->error = IDETAPE_ERROR_GENERAL; /* Giving up */
}
tape->failed_pc=NULL;
@@ -2001,17 +2109,139 @@
}
}
+/*
+ * 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
+ printk (KERN_INFO "ide-tape: Reached idetape_pc_callback\n");
+#endif /* IDETAPE_DEBUG_LOG */
+
+ idetape_end_request (tape->pc->error ? 0:1, HWGROUP(drive));
+ return ide_stopped;
+}
+
+/*
+ * A mode sense command is used to "sense" tape parameters.
+ */
+static void idetape_create_mode_sense_cmd (idetape_pc_t *pc, byte page_code)
+{
+ idetape_init_pc (pc);
+ pc->c[0] = IDETAPE_MODE_SENSE_CMD;
+ pc->c[1] = 8; /* DBD = 1 - Don't return block descriptors for now */
+ pc->c[2] = page_code;
+ pc->c[3] = 255; /* Don't limit the returned information */
+ pc->c[4] = 255; /* (We will just discard data in that case) */
+ if (page_code == IDETAPE_CAPABILITIES_PAGE)
+ pc->request_transfer = 24;
+ else
+ pc->request_transfer = 50;
+ pc->callback = &idetape_pc_callback;
+}
+
+static ide_startstop_t idetape_onstream_buffer_fill_callback (ide_drive_t *drive)
+{
+ idetape_tape_t *tape = drive->driver_data;
+
+ tape->max_frames = tape->pc->buffer[4 + 2];
+ tape->cur_frames = tape->pc->buffer[4 + 3];
+ if (tape->chrdev_direction == idetape_direction_write)
+ tape->tape_head = tape->buffer_head - tape->cur_frames;
+ else
+ tape->tape_head = tape->buffer_head + tape->cur_frames;
+ if (tape->tape_head != tape->last_tape_head) {
+ tape->last_tape_head = tape->tape_head;
+ tape->tape_still_time_begin = jiffies;
+ if (tape->tape_still_time > 200)
+ tape->measure_insert_time = 1;
+ }
+ tape->tape_still_time = (jiffies - tape->tape_still_time_begin) * 1000 / HZ;
+#if USE_IOTRACE
+ IO_trace(IO_IDETAPE_FIFO, tape->pipeline_head, tape->buffer_head, tape->tape_head, tape->minor);
+#endif
+#if IDETAPE_DEBUG_LOG
+ printk(KERN_INFO "buffer fill callback, %d/%d\n", tape->cur_frames, tape->max_frames);
+#endif
+ idetape_end_request (tape->pc->error ? 0:1, HWGROUP(drive));
+ return ide_stopped;
+}
+
+static void idetape_queue_onstream_buffer_fill (ide_drive_t *drive)
+{
+ idetape_pc_t *pc;
+ struct request *rq;
+
+ pc = idetape_next_pc_storage (drive);
+ rq = idetape_next_rq_storage (drive);
+ idetape_create_mode_sense_cmd (pc, 0x33);
+ pc->callback = idetape_onstream_buffer_fill_callback;
+ idetape_queue_pc_head (drive, pc, rq);
+}
+
+static void calculate_speeds(ide_drive_t *drive)
+{
+ idetape_tape_t *tape = drive->driver_data;
+ int full = 125, empty = 75;
+
+ if (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 (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 (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 (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 (jiffies > tape->uncontrolled_pipeline_head_time + 30 * HZ) {
+ tape->uncontrolled_pipeline_head_time = jiffies;
+ }
+ }
+ tape->pipeline_head_speed = IDE_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 = IDE_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;
idetape_status_reg_t status;
+ if (tape->onstream)
+ printk(KERN_INFO "ide-tape: bug: onstream, media_access_finished\n");
status.all = GET_STAT();
if (status.b.dsc) {
if (status.b.check) { /* Error detected */
printk (KERN_ERR "ide-tape: %s: I/O error, ",tape->name);
- return idetape_retry_pc (drive); /* Retry operation */
+ return idetape_retry_pc (drive); /* Retry operation */
}
pc->error = 0;
if (tape->failed_pc == pc)
@@ -2023,32 +2253,34 @@
return pc->callback (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
- printk (KERN_INFO "ide-tape: Reached idetape_pc_callback\n");
-#endif /* IDETAPE_DEBUG_LOG */
-
- idetape_end_request (tape->pc->error ? 0:1, HWGROUP(drive));
- return ide_stopped;
-}
-
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 (jiffies > tape->insert_time)
+ tape->insert_speed = tape->insert_size / 1024 * HZ / (jiffies - tape->insert_time);
+ if (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
printk (KERN_INFO "ide-tape: Reached idetape_rw_callback\n");
#endif /* IDETAPE_DEBUG_LOG */
- tape->block_address += blocks;
+ tape->first_frame_position += blocks;
rq->current_nr_sectors -= blocks;
if (!tape->pc->error)
@@ -2058,82 +2290,9 @@
return ide_stopped;
}
-static void idetape_create_locate_cmd (idetape_pc_t *pc, unsigned int block, byte partition)
-{
- idetape_init_pc (pc);
- pc->c[0] = IDETAPE_LOCATE_CMD;
- pc->c[1] = 2;
- put_unaligned (htonl (block), (unsigned int *) &pc->c[3]);
- pc->c[8] = partition;
- set_bit (PC_WAIT_FOR_DSC, &pc->flags);
- pc->callback = &idetape_pc_callback;
-}
-
-static void idetape_create_rewind_cmd (idetape_pc_t *pc)
-{
- idetape_init_pc (pc);
- pc->c[0] = IDETAPE_REWIND_CMD;
- set_bit (PC_WAIT_FOR_DSC, &pc->flags);
- pc->callback = &idetape_pc_callback;
-}
-
-/*
- * A mode sense command is used to "sense" tape parameters.
- */
-static void idetape_create_mode_sense_cmd (idetape_pc_t *pc, byte page_code)
-{
- idetape_init_pc (pc);
- pc->c[0] = IDETAPE_MODE_SENSE_CMD;
- pc->c[1] = 8; /* DBD = 1 - Don't return block descriptors for now */
- pc->c[2] = page_code;
- pc->c[3] = 255; /* Don't limit the returned information */
- pc->c[4] = 255; /* (We will just discard data in that case) */
- if (page_code == IDETAPE_CAPABILITIES_PAGE)
- pc->request_transfer = 24;
-#if IDETAPE_DEBUG_BUGS
- else
- printk (KERN_ERR "ide-tape: unsupported page code in create_mode_sense_cmd\n");
-#endif /* IDETAPE_DEBUG_BUGS */
- pc->callback = &idetape_pc_callback;
-}
-
-/*
- * 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.
- *
- */
-static void idetape_create_write_filemark_cmd (idetape_pc_t *pc,int write_filemark)
-{
- idetape_init_pc (pc);
- pc->c[0] = IDETAPE_WRITE_FILEMARK_CMD;
- pc->c[4] = write_filemark;
- set_bit (PC_WAIT_FOR_DSC, &pc->flags);
- pc->callback = &idetape_pc_callback;
-}
-
-static void idetape_create_load_unload_cmd (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;
-}
-
-static void idetape_create_erase_cmd (idetape_pc_t *pc)
-{
- idetape_init_pc (pc);
- pc->c[0] = IDETAPE_ERASE_CMD;
- pc->c[1] = 1;
- set_bit (PC_WAIT_FOR_DSC, &pc->flags);
- pc->callback = &idetape_pc_callback;
-}
-
-static void idetape_create_read_cmd (idetape_tape_t *tape, idetape_pc_t *pc, unsigned int length, struct buffer_head *bh)
+static void idetape_create_read_cmd (idetape_tape_t *tape, idetape_pc_t *pc, unsigned int length, struct buffer_head *bh)
{
+ struct buffer_head *p = bh;
idetape_init_pc (pc);
pc->c[0] = IDETAPE_READ_CMD;
put_unaligned (htonl (length), (unsigned int *) &pc->c[1]);
@@ -2142,77 +2301,76 @@
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);
+ if (tape->onstream) {
+ while (p) {
+ atomic_set(&p->b_count, 0);
+ p = p->b_reqnext;
+ }
+ }
+ if (!tape->onstream) {
+ 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);
+ } else {
+ if (length) {
+ pc->request_transfer = pc->buffer_size = 32768 + 512;
+ set_bit (PC_DMA_RECOMMENDED, &pc->flags);
+ } else
+ pc->request_transfer = 0;
+ }
}
-static void idetape_create_space_cmd (idetape_pc_t *pc,int count,byte cmd)
+static void idetape_create_read_buffer_cmd(idetape_tape_t *tape, idetape_pc_t *pc, unsigned int length, struct buffer_head *bh)
{
+ int size = 32768;
+
+ struct buffer_head *p = bh;
idetape_init_pc (pc);
- pc->c[0] = IDETAPE_SPACE_CMD;
- put_unaligned (htonl (count), (unsigned int *) &pc->c[1]);
- pc->c[1] = cmd;
- set_bit (PC_WAIT_FOR_DSC, &pc->flags);
+ 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;
+ 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->request_transfer = pc->buffer_size = size;
}
static void idetape_create_write_cmd (idetape_tape_t *tape, idetape_pc_t *pc, unsigned int length, struct buffer_head *bh)
{
+ struct buffer_head *p = 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);
+ if (tape->onstream) {
+ while (p) {
+ atomic_set(&p->b_count, p->b_size);
+ p = p->b_reqnext;
+ }
+ }
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);
-}
-
-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
- 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
- printk (KERN_INFO "BOP - %s\n",result->bop ? "Yes":"No");
- printk (KERN_INFO "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 (0,HWGROUP (drive));
- } else {
-#if IDETAPE_DEBUG_LOG
- printk (KERN_INFO "Block Location - %lu\n", ntohl (result->first_block));
-#endif /* IDETAPE_DEBUG_LOG */
- tape->partition = result->partition;
- tape->block_address = ntohl (result->first_block);
- set_bit (IDETAPE_ADDRESS_VALID, &tape->flags);
- idetape_end_request (1,HWGROUP (drive));
- }
- } else
- idetape_end_request (0,HWGROUP (drive));
- return ide_stopped;
-}
-
-static void idetape_create_read_position_cmd (idetape_pc_t *pc)
-{
- idetape_init_pc (pc);
- pc->c[0] = IDETAPE_READ_POSITION_CMD;
- pc->request_transfer = 20;
- pc->callback = &idetape_read_position_callback;
+ if (!tape->onstream) {
+ 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);
+ } else {
+ if (length) {
+ pc->request_transfer = pc->buffer_size = 32768 + 512;
+ set_bit (PC_DMA_RECOMMENDED, &pc->flags);
+ } else
+ pc->request_transfer = 0;
+ }
}
/*
@@ -2261,8 +2419,54 @@
* the other device meanwhile.
*/
status.all = GET_STAT();
+
+ /*
+ * The OnStream tape drive doesn't support DSC. Assume
+ * that DSC is always set.
+ */
+ if (tape->onstream)
+ status.b.dsc = 1;
if (!drive->dsc_overlap && rq->cmd != IDETAPE_PC_RQ2)
set_bit (IDETAPE_IGNORE_DSC, &tape->flags);
+
+ /*
+ * For the OnStream tape, check the current status of the tape
+ * internal buffer using data gathered from the buffer fill
+ * mode page, and postpone our request, effectively "disconnecting"
+ * from the IDE bus, in case the buffer is full (writing) or
+ * empty (reading), and there is a danger that our request will
+ * hold the IDE bus during actual media access.
+ */
+ if (tape->tape_still_time > 100 && tape->tape_still_time < 200)
+ tape->measure_insert_time = 1;
+ if (tape->req_buffer_fill && (rq->cmd == IDETAPE_WRITE_RQ || rq->cmd == IDETAPE_READ_RQ)) {
+ tape->req_buffer_fill = 0;
+ tape->writes_since_buffer_fill = 0;
+ tape->reads_since_buffer_fill = 0;
+ tape->last_buffer_fill = jiffies;
+ idetape_queue_onstream_buffer_fill(drive);
+ if (jiffies > tape->insert_time)
+ tape->insert_speed = tape->insert_size / 1024 * HZ / (jiffies - tape->insert_time);
+ return ide_stopped;
+ }
+ if (jiffies > tape->insert_time)
+ tape->insert_speed = tape->insert_size / 1024 * HZ / (jiffies - tape->insert_time);
+ calculate_speeds(drive);
+ if (tape->onstream && tape->max_frames &&
+ ((rq->cmd == IDETAPE_WRITE_RQ && (tape->cur_frames == tape->max_frames || (tape->speed_control && tape->cur_frames > 5 && (tape->insert_speed > tape->max_insert_speed || (0 /* tape->cur_frames > 30 && tape->tape_still_time > 200 */))))) ||
+ (rq->cmd == IDETAPE_READ_RQ && (tape->cur_frames == 0 || (tape->speed_control && (tape->cur_frames < tape->max_frames - 5) && tape->insert_speed > tape->max_insert_speed)) && rq->nr_sectors))) {
+#if IDETAPE_DEBUG_LOG
+ printk(KERN_INFO "postponing request, cmd %d, cur %d, max %d\n",
+ rq->cmd, tape->cur_frames, tape->max_frames);
+#endif
+ if (tape->postpone_cnt++ < 500) {
+ status.b.dsc = 0;
+ tape->req_buffer_fill = 1;
+ }
+#if ONSTREAM_DEBUG
+ else printk(KERN_INFO "ide-tape: %s: postpone_cnt %d\n", tape->name, tape->postpone_cnt);
+#endif
+ }
if (!test_and_clear_bit (IDETAPE_IGNORE_DSC, &tape->flags) && !status.b.dsc) {
if (postponed_rq == NULL) {
tape->dsc_polling_start = jiffies;
@@ -2283,17 +2487,53 @@
}
switch (rq->cmd) {
case IDETAPE_READ_RQ:
+ 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;
+ tape->reads_since_buffer_fill++;
+ if (tape->onstream) {
+ if (tape->cur_frames - tape->reads_since_buffer_fill <= 0)
+ tape->req_buffer_fill = 1;
+ if (jiffies > tape->last_buffer_fill + 5 * HZ / 100)
+ tape->req_buffer_fill = 1;
+ }
pc=idetape_next_pc_storage (drive);
idetape_create_read_cmd (tape, pc, rq->current_nr_sectors, rq->bh);
break;
case IDETAPE_WRITE_RQ:
+ 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;
+ tape->writes_since_buffer_fill++;
+ if (tape->onstream) {
+ if (tape->cur_frames + tape->writes_since_buffer_fill >= tape->max_frames)
+ tape->req_buffer_fill = 1;
+ if (jiffies > tape->last_buffer_fill + 5 * HZ / 100)
+ tape->req_buffer_fill = 1;
+ calculate_speeds(drive);
+ }
pc=idetape_next_pc_storage (drive);
idetape_create_write_cmd (tape, pc, rq->current_nr_sectors, rq->bh);
break;
+ case IDETAPE_READ_BUFFER_RQ:
+ tape->postpone_cnt = 0;
+ pc=idetape_next_pc_storage (drive);
+ idetape_create_read_buffer_cmd (tape, pc, rq->current_nr_sectors, rq->bh);
+ break;
case IDETAPE_ABORTED_WRITE_RQ:
rq->cmd = IDETAPE_WRITE_RQ;
- rq->errors = IDETAPE_ERROR_EOD;
- idetape_end_request (1, HWGROUP(drive));
+ idetape_end_request (IDETAPE_ERROR_EOD, HWGROUP(drive));
+ return ide_stopped;
+ case IDETAPE_ABORTED_READ_RQ:
+#if IDETAPE_DEBUG_LOG
+ printk(KERN_INFO "ide-tape: %s: detected aborted read rq\n", tape->name);
+#endif
+ rq->cmd = IDETAPE_READ_RQ;
+ idetape_end_request (IDETAPE_ERROR_EOD, HWGROUP(drive));
return ide_stopped;
case IDETAPE_PC_RQ1:
pc=(idetape_pc_t *) rq->buffer;
@@ -2311,153 +2551,889 @@
}
/*
- * 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.
+ * Pipeline related functions
*/
-static int idetape_queue_pc_tail (ide_drive_t *drive,idetape_pc_t *pc)
+static inline int idetape_pipeline_active (idetape_tape_t *tape)
{
- struct request rq;
+ int rc1, rc2;
- ide_init_drive_cmd (&rq);
- rq.buffer = (char *) pc;
- rq.cmd = IDETAPE_PC_RQ1;
- return ide_do_drive_cmd (drive, &rq, ide_wait);
+ rc1 = test_bit(IDETAPE_PIPELINE_ACTIVE, &tape->flags);
+ rc2 = (tape->active_data_request != NULL);
+ return rc1;
}
/*
- * idetape_wait_for_request installs a semaphore in a pending request
- * and sleeps until it is serviced.
+ * 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.
*
- * The caller should ensure that the request will not be serviced
- * before we install the semaphore (usually by disabling interrupts).
+ * Returns a pointer to the new allocated stage, or NULL if we
+ * can't (or don't want to) allocate a stage.
+ *
+ * Pipeline stages are optional and are used to increase performance.
+ * If we can't allocate them, we'll manage without them.
*/
-static void idetape_wait_for_request (ide_drive_t *drive, struct request *rq)
+static idetape_stage_t *__idetape_kmalloc_stage (idetape_tape_t *tape, int full, int clear)
{
- DECLARE_MUTEX_LOCKED(sem);
- idetape_tape_t *tape = drive->driver_data;
+ idetape_stage_t *stage;
+ struct buffer_head *prev_bh, *bh;
+ int pages = tape->pages_per_stage;
+ char *b_data;
-#if IDETAPE_DEBUG_BUGS
- if (rq == NULL || !IDETAPE_RQ_CMD (rq->cmd)) {
- printk (KERN_ERR "ide-tape: bug: Trying to sleep on non-valid request\n");
- return;
+ if ((stage = (idetape_stage_t *) kmalloc (sizeof (idetape_stage_t),GFP_KERNEL)) == NULL)
+ return NULL;
+ stage->next = NULL;
+
+ bh = stage->bh = (struct buffer_head *) kmalloc (sizeof (struct buffer_head), GFP_KERNEL);
+ if (bh == NULL)
+ goto abort;
+ bh->b_reqnext = NULL;
+ if ((bh->b_data = (char *) __get_free_page (GFP_KERNEL)) == NULL)
+ goto abort;
+ if (clear)
+ memset(bh->b_data, 0, PAGE_SIZE);
+ bh->b_size = PAGE_SIZE;
+ atomic_set(&bh->b_count, full ? bh->b_size : 0);
+ set_bit (BH_Lock, &bh->b_state);
+
+ while (--pages) {
+ if ((b_data = (char *) __get_free_page (GFP_KERNEL)) == NULL)
+ goto abort;
+ if (clear)
+ memset(b_data, 0, PAGE_SIZE);
+ if (bh->b_data == b_data + PAGE_SIZE && virt_to_bus (bh->b_data) == virt_to_bus (b_data) + PAGE_SIZE) {
+ bh->b_size += PAGE_SIZE;
+ bh->b_data -= PAGE_SIZE;
+ if (full)
+ atomic_add(PAGE_SIZE, &bh->b_count);
+ continue;
+ }
+ if (b_data == bh->b_data + bh->b_size && virt_to_bus (b_data) == virt_to_bus (bh->b_data) + bh->b_size) {
+ bh->b_size += PAGE_SIZE;
+ if (full)
+ atomic_add(PAGE_SIZE, &bh->b_count);
+ continue;
+ }
+ prev_bh = bh;
+ if ((bh = (struct buffer_head *) kmalloc (sizeof (struct buffer_head), GFP_KERNEL)) == NULL) {
+ free_page ((unsigned long) b_data);
+ goto abort;
+ }
+ bh->b_reqnext = NULL;
+ bh->b_data = b_data;
+ bh->b_size = PAGE_SIZE;
+ atomic_set(&bh->b_count, full ? bh->b_size : 0);
+ set_bit (BH_Lock, &bh->b_state);
+ prev_bh->b_reqnext = bh;
}
-#endif /* IDETAPE_DEBUG_BUGS */
- rq->sem = &sem;
- spin_unlock(&tape->spinlock);
- down(&sem);
- spin_lock_irq(&tape->spinlock);
+ bh->b_size -= tape->excess_bh_size;
+ if (full)
+ atomic_sub(tape->excess_bh_size, &bh->b_count);
+ if (tape->onstream)
+ stage->aux = (os_aux_t *) (bh->b_data + bh->b_size - OS_AUX_SIZE);
+ return stage;
+abort:
+ __idetape_kfree_stage (stage);
+ return NULL;
}
-/*
- * idetape_queue_rw_tail generates 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 buffer_head *bh)
+static idetape_stage_t *idetape_kmalloc_stage (idetape_tape_t *tape)
{
- idetape_tape_t *tape = drive->driver_data;
- struct request rq;
+ idetape_stage_t *cache_stage = tape->cache_stage;
#if IDETAPE_DEBUG_LOG
- printk (KERN_INFO "idetape_queue_rw_tail: cmd=%d\n",cmd);
+ printk (KERN_INFO "Reached idetape_kmalloc_stage\n");
#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 */
- ide_init_drive_cmd (&rq);
- rq.bh = bh;
- rq.cmd = cmd;
- rq.sector = tape->block_address;
+ 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 void idetape_copy_stage_from_user (idetape_tape_t *tape, idetape_stage_t *stage, const char *buf, int n)
+{
+ struct buffer_head *bh = tape->bh;
+ int count;
+
+ while (n) {
+#if IDETAPE_DEBUG_BUGS
+ if (bh == NULL) {
+ printk (KERN_ERR "ide-tape: bh == NULL in idetape_copy_stage_from_user\n");
+ return;
+ }
+#endif /* IDETAPE_DEBUG_BUGS */
+ count = IDE_MIN (bh->b_size - atomic_read(&bh->b_count), n);
+ copy_from_user (bh->b_data + atomic_read(&bh->b_count), buf, count);
+ n -= count; atomic_add(count, &bh->b_count); buf += count;
+ if (atomic_read(&bh->b_count) == bh->b_size) {
+ bh = bh->b_reqnext;
+ if (bh)
+ atomic_set(&bh->b_count, 0);
+ }
+ }
+ tape->bh = bh;
+}
+
+static void idetape_copy_stage_to_user (idetape_tape_t *tape, char *buf, idetape_stage_t *stage, int n)
+{
+ struct buffer_head *bh = tape->bh;
+ int count;
+
+ while (n) {
+#if IDETAPE_DEBUG_BUGS
+ if (bh == NULL) {
+ printk (KERN_ERR "ide-tape: bh == NULL in idetape_copy_stage_to_user\n");
+ return;
+ }
+#endif /* IDETAPE_DEBUG_BUGS */
+ count = IDE_MIN (tape->b_count, n);
+ copy_to_user (buf, tape->b_data, count);
+ n -= count; tape->b_data += count; tape->b_count -= count; buf += count;
+ if (!tape->b_count) {
+ tape->bh = bh = bh->b_reqnext;
+ if (bh) {
+ tape->b_data = bh->b_data;
+ tape->b_count = atomic_read(&bh->b_count);
+ }
+ }
+ }
+}
+
+static void idetape_init_merge_stage (idetape_tape_t *tape)
+{
+ struct buffer_head *bh = tape->merge_stage->bh;
+
+ tape->bh = bh;
+ if (tape->chrdev_direction == idetape_direction_write)
+ atomic_set(&bh->b_count, 0);
+ else {
+ tape->b_data = bh->b_data;
+ tape->b_count = atomic_read(&bh->b_count);
+ }
+}
+
+static void idetape_switch_buffers (idetape_tape_t *tape, idetape_stage_t *stage)
+{
+ struct buffer_head *tmp;
+ os_aux_t *tmp_aux;
+
+ tmp = stage->bh; tmp_aux = stage->aux;
+ stage->bh = tape->merge_stage->bh; stage->aux = tape->merge_stage->aux;
+ tape->merge_stage->bh = tmp; tape->merge_stage->aux = tmp_aux;
+ 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
+ printk (KERN_INFO "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);
+}
+
+/*
+ * Initialize the OnStream AUX
+ */
+static void idetape_init_stage(ide_drive_t *drive, idetape_stage_t *stage, int frame_type, int logical_blk_num)
+{
+ idetape_tape_t *tape = drive->driver_data;
+ os_aux_t *aux = stage->aux;
+ os_partition_t *par = &aux->partition;
+ os_dat_t *dat = &aux->dat;
+
+ if (!tape->onstream || tape->raw)
+ return;
+ memset(aux, 0, sizeof(*aux));
+ aux->format_id = htonl(0);
+ memcpy(aux->application_sig, "LIN3", 4);
+ aux->hdwr = htonl(0);
+ aux->frame_type = frame_type;
+
+ if (frame_type == OS_FRAME_TYPE_HEADER) {
+ aux->update_frame_cntr = htonl(tape->update_frame_cntr);
+ par->partition_num = OS_CONFIG_PARTITION;
+ par->par_desc_ver = OS_PARTITION_VERSION;
+ par->wrt_pass_cntr = htons(0xffff);
+ par->first_frame_addr = htonl(0);
+ par->last_frame_addr = htonl(0xbb7);
+ } else {
+ aux->update_frame_cntr = htonl(0);
+ par->partition_num = OS_DATA_PARTITION;
+ par->par_desc_ver = OS_PARTITION_VERSION;
+ par->wrt_pass_cntr = htons(tape->wrt_pass_cntr);
+ par->first_frame_addr = htonl(0x14);
+ par->last_frame_addr = htonl(19239 * 24);
+ }
+ if (frame_type != OS_FRAME_TYPE_HEADER) {
+ aux->frame_seq_num = htonl(logical_blk_num);
+ aux->logical_blk_num_high = htonl(0);
+ aux->logical_blk_num = htonl(logical_blk_num);
+ } else {
+ aux->frame_seq_num = htonl(0);
+ aux->logical_blk_num_high = htonl(0);
+ aux->logical_blk_num = htonl(0);
+ }
+
+ if (frame_type != OS_FRAME_TYPE_HEADER) {
+ dat->dat_sz = 8;
+ dat->reserved1 = 0;
+ dat->entry_cnt = 1;
+ dat->reserved3 = 0;
+ if (frame_type == OS_FRAME_TYPE_DATA)
+ dat->dat_list[0].blk_sz = htonl(32 * 1024);
+ else
+ dat->dat_list[0].blk_sz = 0;
+ dat->dat_list[0].blk_cnt = htons(1);
+ if (frame_type == OS_FRAME_TYPE_MARKER)
+ dat->dat_list[0].flags = OS_DAT_FLAGS_MARK;
+ else
+ dat->dat_list[0].flags = OS_DAT_FLAGS_DATA;
+ dat->dat_list[0].reserved = 0;
+ } else
+ aux->next_mark_addr = htonl(tape->first_mark_addr);
+ aux->filemark_cnt = ntohl(tape->filemark_cnt);
+ aux->phys_fm = ntohl(0xffffffff);
+ aux->last_mark_addr = ntohl(tape->last_mark_addr);
+}
+
+/*
+ * idetape_wait_for_request installs a semaphore 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 semaphore (usually by disabling interrupts).
+ */
+static void idetape_wait_for_request (ide_drive_t *drive, struct request *rq)
+{
+ DECLARE_MUTEX_LOCKED(sem);
+ idetape_tape_t *tape = drive->driver_data;
+
+#if IDETAPE_DEBUG_BUGS
+ if (rq == NULL || !IDETAPE_RQ_CMD (rq->cmd)) {
+ printk (KERN_ERR "ide-tape: bug: Trying to sleep on non-valid request\n");
+ return;
+ }
+#endif /* IDETAPE_DEBUG_BUGS */
+ rq->sem = &sem;
+ tape->sem = &sem;
+ spin_unlock(&tape->spinlock);
+ down(&sem);
+ rq->sem = NULL;
+ tape->sem = NULL;
+ 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
+ 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
+ printk (KERN_INFO "BOP - %s\n",result->bop ? "Yes":"No");
+ printk (KERN_INFO "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 (0,HWGROUP (drive));
+ } else {
+#if IDETAPE_DEBUG_LOG
+ printk (KERN_INFO "Block Location - %lu\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 (1,HWGROUP (drive));
+ }
+ } else {
+ idetape_end_request (0,HWGROUP (drive));
+ }
+ 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.
+ *
+ */
+static void idetape_create_write_filemark_cmd (ide_drive_t *drive, idetape_pc_t *pc,int write_filemark)
+{
+ idetape_tape_t *tape = drive->driver_data;
+
+ idetape_init_pc (pc);
+ pc->c[0] = IDETAPE_WRITE_FILEMARK_CMD;
+ if (tape->onstream)
+ pc->c[1] = 1;
+ 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 request rq;
+
+ ide_init_drive_cmd (&rq);
+ rq.buffer = (char *) pc;
+ rq.cmd = IDETAPE_PC_RQ1;
+ 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_tape_t *tape = drive->driver_data;
+
+ idetape_init_pc (pc);
+ pc->c[0] = IDETAPE_LOAD_UNLOAD_CMD;
+ pc->c[4] = cmd;
+ if (tape->onstream)
+ pc->c[1] = 1;
+ set_bit (PC_WAIT_FOR_DSC, &pc->flags);
+ pc->callback = &idetape_pc_callback;
+}
+
+static int idetape_wait_ready(ide_drive_t *drive, unsigned long long timeout)
+{
+ idetape_tape_t *tape = drive->driver_data;
+ idetape_pc_t pc;
+
+ /*
+ * Wait for the tape to become ready
+ */
+ timeout += jiffies;
+ while (jiffies < timeout) {
+ idetape_create_test_unit_ready_cmd(&pc);
+ if (!__idetape_queue_pc_tail(drive, &pc))
+ return 0;
+ if (tape->sense_key == 2 && tape->asc == 4 && tape->ascq == 2) {
+ idetape_create_load_unload_cmd (drive, &pc, IDETAPE_LU_LOAD_MASK);
+ __idetape_queue_pc_tail(drive,&pc);
+ idetape_create_test_unit_ready_cmd(&pc);
+ if (!__idetape_queue_pc_tail(drive, &pc))
+ return 0;
+ }
+ if (!(tape->sense_key == 2 && tape->asc == 4 && (tape->ascq == 1 || tape->ascq == 8)))
+ break;
+ current->state = TASK_INTERRUPTIBLE;
+ schedule_timeout(HZ / 10);
+ }
+ return -EIO;
+}
+
+static int idetape_queue_pc_tail (ide_drive_t *drive,idetape_pc_t *pc)
+{
+ idetape_tape_t *tape = drive->driver_data;
+ int rc;
+
+ rc = __idetape_queue_pc_tail(drive, pc);
+ if (rc) return rc;
+ if (tape->onstream && test_bit(PC_WAIT_FOR_DSC, &pc->flags))
+ rc = idetape_wait_ready(drive, 60 * 5 * HZ);
+ return rc;
+}
+
+static int idetape_flush_tape_buffers (ide_drive_t *drive)
+{
+ idetape_pc_t pc;
+ int rc;
+
+ idetape_create_write_filemark_cmd(drive, &pc, 0);
+ if ((rc = idetape_queue_pc_tail (drive,&pc)))
+ return rc;
+ idetape_wait_ready(drive, 60 * 5 * HZ);
+ return 0;
+}
+
+static void idetape_create_read_position_cmd (idetape_pc_t *pc)
+{
+ idetape_init_pc (pc);
+ pc->c[0] = IDETAPE_READ_POSITION_CMD;
+ pc->request_transfer = 20;
+ pc->callback = &idetape_read_position_callback;
+}
+
+static int idetape_read_position(ide_drive_t *drive)
+{
+ idetape_tape_t *tape = drive->driver_data;
+ idetape_pc_t pc;
+ int position;
+
+ idetape_flush_tape_buffers(drive);
+ idetape_create_read_position_cmd(&pc);
+ if (idetape_queue_pc_tail (drive,&pc))
+ return -1;
+ position = tape->first_frame_position;
+ if (tape->onstream) {
+ if ((position != tape->last_frame_position - tape->blocks_in_buffer) &&
+ (position != tape->last_frame_position + tape->blocks_in_buffer)) {
+ if (tape->blocks_in_buffer == 0) {
+ printk("ide-tape: %s: correcting read position %d, %d, %d\n", tape->name, position, tape->last_frame_position, tape->blocks_in_buffer);
+ position = tape->last_frame_position;
+ tape->first_frame_position = position;
+ }
+ }
+ }
+ return position;
+}
+
+static void idetape_create_locate_cmd (ide_drive_t *drive, idetape_pc_t *pc, unsigned int block, byte partition, int skip)
+{
+ idetape_tape_t *tape = drive->driver_data;
+
+ idetape_init_pc (pc);
+ pc->c[0] = IDETAPE_LOCATE_CMD;
+ if (tape->onstream)
+ pc->c[1] = 1;
+ else
+ pc->c[1] = 2;
+ put_unaligned (htonl (block), (unsigned int *) &pc->c[3]);
+ pc->c[8] = partition;
+ if (tape->onstream)
+ pc->c[9] = skip << 7;
+ set_bit (PC_WAIT_FOR_DSC, &pc->flags);
+ pc->callback = &idetape_pc_callback;
+}
+
+static void idetape_create_prevent_cmd(ide_drive_t *drive, idetape_pc_t *pc, int prevent)
+{
+ idetape_init_pc(pc);
+ pc->c[0] = IDETAPE_PREVENT_CMD;
+ pc->c[4] = prevent;
+ pc->callback = &idetape_pc_callback;
+}
+
+static int __idetape_discard_read_pipeline (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;
+ tape->merge_stage_size = 0;
+ if (tape->merge_stage != NULL) {
+ __idetape_kfree_stage (tape->merge_stage);
+ tape->merge_stage = NULL;
+ }
+ tape->chrdev_direction = idetape_direction_none;
+
+ 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);
+
+ cnt = tape->nr_stages - tape->nr_pending_stages;
+ while (tape->first_stage != NULL)
+ idetape_remove_stage_head (drive);
+ tape->nr_pending_stages = 0;
+ tape->max_stages = tape->min_pipeline;
+ return cnt;
+}
+
+/*
+ * 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.
+ *
+ */
+static int idetape_position_tape (ide_drive_t *drive, unsigned int block, byte partition, int skip)
+{
+ idetape_tape_t *tape = drive->driver_data;
+ int retval;
+ idetape_pc_t pc;
+
+ if (tape->chrdev_direction == idetape_direction_read)
+ __idetape_discard_read_pipeline(drive);
+ idetape_wait_ready(drive, 60 * 5 * HZ);
+ idetape_create_locate_cmd (drive, &pc, block, partition, skip);
+ retval=idetape_queue_pc_tail (drive,&pc);
+ if (retval) return (retval);
+
+ idetape_create_read_position_cmd (&pc);
+ return (idetape_queue_pc_tail (drive,&pc));
+}
+
+static void idetape_discard_read_pipeline (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);
+ if (restore_position) {
+ position = idetape_read_position(drive);
+#if ONSTREAM_DEBUG
+ printk(KERN_INFO "ide-tape: address %u, nr_stages %d\n", position, cnt);
+#endif
+ seek = position > cnt ? position - cnt : 0;
+ if (idetape_position_tape(drive, seek, 0, 0)) {
+ printk(KERN_INFO "ide-tape: %s: position_tape failed in discard_pipeline()\n", tape->name);
+ return;
+ }
+ }
+}
+
+static void idetape_update_stats(ide_drive_t *drive)
+{
+ idetape_pc_t pc;
+
+ idetape_create_mode_sense_cmd (&pc, 0x33);
+ pc.callback = idetape_onstream_buffer_fill_callback;
+ (void) idetape_queue_pc_tail(drive, &pc);
+}
+
+/*
+ * idetape_queue_rw_tail generates 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 buffer_head *bh)
+{
+ idetape_tape_t *tape = drive->driver_data;
+ struct request rq;
+
+#if IDETAPE_DEBUG_LOG
+ printk (KERN_INFO "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 */
+
+ ide_init_drive_cmd (&rq);
+ rq.bh = bh;
+ rq.cmd = cmd;
+ rq.sector = tape->first_frame_position;
rq.nr_sectors = rq.current_nr_sectors = blocks;
+ if (tape->onstream)
+ tape->postpone_cnt = 600;
(void) ide_do_drive_cmd (drive, &rq, ide_wait);
- idetape_init_merge_stage (tape);
- if (rq.errors == IDETAPE_ERROR_GENERAL)
- return -EIO;
- return (tape->tape_block_size * (blocks-rq.current_nr_sectors));
+ if (cmd != IDETAPE_READ_RQ && cmd != IDETAPE_WRITE_RQ)
+ return 0;
+
+ if (tape->merge_stage)
+ idetape_init_merge_stage (tape);
+ if (rq.errors == IDETAPE_ERROR_GENERAL)
+ return -EIO;
+ return (tape->tape_block_size * (blocks-rq.current_nr_sectors));
+}
+
+/*
+ * Read back the drive's internal buffer contents, as a part
+ * of the write error recovery mechanism for old OnStream
+ * firmware revisions.
+ */
+static void idetape_onstream_read_back_buffer(ide_drive_t *drive)
+{
+ idetape_tape_t *tape = drive->driver_data;
+ int frames, i, logical_blk_num;
+ idetape_stage_t *stage, *first = NULL, *last = NULL;
+ os_aux_t *aux;
+ struct request *rq;
+ unsigned char *p;
+ unsigned long flags;
+
+ idetape_update_stats(drive);
+ frames = tape->cur_frames;
+ logical_blk_num = ntohl(tape->first_stage->aux->logical_blk_num) - frames;
+ printk(KERN_INFO "ide-tape: %s: reading back %d frames from the drive's internal buffer\n", tape->name, frames);
+ for (i = 0; i < frames; i++) {
+ stage = __idetape_kmalloc_stage(tape, 0, 0);
+ if (!first)
+ first = stage;
+ aux = stage->aux;
+ p = stage->bh->b_data;
+ idetape_queue_rw_tail(drive, IDETAPE_READ_BUFFER_RQ, tape->capabilities.ctl, stage->bh);
+#if ONSTREAM_DEBUG
+ printk(KERN_INFO "ide-tape: %s: read back logical block %d, data %x %x %x %x\n", tape->name, logical_blk_num, *p++, *p++, *p++, *p++);
+#endif
+ rq = &stage->rq;
+ ide_init_drive_cmd (rq);
+ rq->cmd = IDETAPE_WRITE_RQ;
+ rq->sector = tape->first_frame_position;
+ rq->nr_sectors = rq->current_nr_sectors = tape->capabilities.ctl;
+ idetape_init_stage(drive, stage, OS_FRAME_TYPE_DATA, logical_blk_num++);
+ stage->next = NULL;
+ if (last)
+ last->next = stage;
+ last = stage;
+ }
+ if (frames) {
+ spin_lock_irqsave(&tape->spinlock, flags);
+ last->next = tape->first_stage;
+ tape->next_stage = tape->first_stage = first;
+ tape->nr_stages += frames;
+ tape->nr_pending_stages += frames;
+ spin_unlock_irqrestore(&tape->spinlock, flags);
+ }
+ idetape_update_stats(drive);
+#if ONSTREAM_DEBUG
+ printk(KERN_INFO "ide-tape: %s: frames left in buffer: %d\n", tape->name, tape->cur_frames);
+#endif
+}
+
+/*
+ * Error recovery algorithm for the OnStream tape.
+ */
+static void idetape_onstream_write_error_recovery(ide_drive_t *drive)
+{
+ idetape_tape_t *tape = drive->driver_data;
+ unsigned int block;
+
+ if (tape->onstream_write_error == 1) {
+ printk(KERN_ERR "ide-tape: %s: detected physical bad block at %lu\n", tape->name, ntohl(tape->sense.information));
+ block = ntohl(tape->sense.information) + 80;
+ idetape_update_stats(drive);
+ printk(KERN_ERR "ide-tape: %s: relocating %d buffered logical blocks to physical block %u\n", tape->name, tape->cur_frames, block);
+ idetape_update_stats(drive);
+ if (tape->firmware_revision_num >= 106)
+ idetape_position_tape(drive, block, 0, 1);
+ else {
+ idetape_onstream_read_back_buffer(drive);
+ idetape_position_tape(drive, block, 0, 0);
+ }
+ idetape_read_position(drive);
+#if ONSTREAM_DEBUG
+ printk(KERN_ERR "ide-tape: %s: positioning complete, cur_frames %d, pos %d, tape pos %d\n", tape->name, tape->cur_frames, tape->first_frame_position, tape->last_frame_position);
+#endif
+ } else if (tape->onstream_write_error == 2) {
+#if ONSTREAM_DEBUG
+ printk(KERN_INFO "ide-tape: %s: skipping over config partition\n", tape->name);
+#endif
+ idetape_flush_tape_buffers(drive);
+ block = idetape_read_position(drive);
+ if (block != 0xba4)
+ printk(KERN_ERR "ide-tape: warning, current position %d, expected %d\n", block, 0xba4);
+ idetape_position_tape(drive, 0xbb8, 0, 0);
+ }
+ tape->onstream_write_error = 0;
+}
+
+/*
+ * 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)) {
+ if (tape->onstream_write_error)
+ idetape_onstream_write_error_recovery(drive);
+ 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;
+}
+
+static void idetape_create_rewind_cmd (ide_drive_t *drive, idetape_pc_t *pc)
+{
+ idetape_tape_t *tape = drive->driver_data;
+
+ idetape_init_pc (pc);
+ pc->c[0] = IDETAPE_REWIND_CMD;
+ if (tape->onstream)
+ pc->c[1] = 1;
+ set_bit (PC_WAIT_FOR_DSC, &pc->flags);
+ pc->callback = &idetape_pc_callback;
+}
+
+static void idetape_create_mode_select_cmd (idetape_pc_t *pc, int length)
+{
+ 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;
+}
+
+static void idetape_create_erase_cmd (idetape_pc_t *pc)
+{
+ idetape_init_pc (pc);
+ pc->c[0] = IDETAPE_ERASE_CMD;
+ pc->c[1] = 1;
+ set_bit (PC_WAIT_FOR_DSC, &pc->flags);
+ pc->callback = &idetape_pc_callback;
+}
+
+static void idetape_create_space_cmd (idetape_pc_t *pc,int count,byte cmd)
+{
+ idetape_init_pc (pc);
+ pc->c[0] = IDETAPE_SPACE_CMD;
+ put_unaligned (htonl (count), (unsigned int *) &pc->c[1]);
+ pc->c[1] = cmd;
+ set_bit (PC_WAIT_FOR_DSC, &pc->flags);
+ pc->callback = &idetape_pc_callback;
}
/*
- * 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.
+ * Verify that we have the correct tape frame
*/
-static int idetape_add_chrdev_read_request (ide_drive_t *drive,int blocks)
+static int idetape_verify_stage(ide_drive_t *drive, idetape_stage_t *stage, int logical_blk_num, int quiet)
{
idetape_tape_t *tape = drive->driver_data;
- idetape_stage_t *new_stage;
- unsigned long flags;
- struct request rq,*rq_ptr;
- int bytes_read;
-
-#if IDETAPE_DEBUG_LOG
- printk (KERN_INFO "Reached idetape_add_chrdev_read_request\n");
-#endif /* IDETAPE_DEBUG_LOG */
-
- ide_init_drive_cmd (&rq);
- rq.cmd = IDETAPE_READ_RQ;
- rq.sector = tape->block_address;
- rq.nr_sectors = rq.current_nr_sectors = blocks;
+ os_aux_t *aux = stage->aux;
+ os_partition_t *par = &aux->partition;
+ struct request *rq = &stage->rq;
+ struct buffer_head *bh;
- if (idetape_pipeline_active (tape) || tape->nr_stages <= tape->max_stages / 4) {
- new_stage=idetape_kmalloc_stage (tape);
- while (new_stage != NULL) {
- new_stage->rq=rq;
- idetape_add_stage_tail (drive,new_stage);
- new_stage=idetape_kmalloc_stage (tape);
+ if (!tape->onstream)
+ return 1;
+ if (tape->raw) {
+ if (rq->errors) {
+ bh = stage->bh;
+ while (bh) {
+ memset(bh->b_data, 0, bh->b_size);
+ bh = bh->b_reqnext;
+ }
+ strcpy(stage->bh->b_data, "READ ERROR ON FRAME");
}
- if (!idetape_pipeline_active (tape))
- idetape_insert_pipeline_into_queue (drive);
+ return 1;
}
- if (tape->first_stage == NULL) {
- /*
- * Linux is short on memory. Revert to non-pipelined
- * operation mode for this request.
- */
- return (idetape_queue_rw_tail (drive, IDETAPE_READ_RQ, blocks, tape->merge_stage->bh));
+ if (rq->errors == IDETAPE_ERROR_GENERAL) {
+ printk(KERN_INFO "ide-tape: %s: skipping frame, read error\n", tape->name);
+ return 0;
+ }
+ if (rq->errors == IDETAPE_ERROR_EOD) {
+ printk(KERN_INFO "ide-tape: %s: skipping frame, eod\n", tape->name);
+ return 0;
+ }
+ if (ntohl(aux->format_id) != 0) {
+ printk(KERN_INFO "ide-tape: %s: skipping frame, format_id %lu\n", tape->name, ntohl(aux->format_id));
+ return 0;
+ }
+ if (memcmp(aux->application_sig, tape->application_sig, 4) != 0) {
+ printk(KERN_INFO "ide-tape: %s: skipping frame, incorrect application signature\n", tape->name);
+ return 0;
+ }
+ if (aux->frame_type != OS_FRAME_TYPE_DATA &&
+ aux->frame_type != OS_FRAME_TYPE_EOD &&
+ aux->frame_type != OS_FRAME_TYPE_MARKER) {
+ printk(KERN_INFO "ide-tape: %s: skipping frame, frame type %x\n", tape->name, aux->frame_type);
+ return 0;
+ }
+ if (par->partition_num != OS_DATA_PARTITION) {
+ if (!tape->linux_media || tape->linux_media_version != 2) {
+ printk(KERN_INFO "ide-tape: %s: skipping frame, partition num %d\n", tape->name, par->partition_num);
+ return 0;
+ }
+ }
+ if (par->par_desc_ver != OS_PARTITION_VERSION) {
+ printk(KERN_INFO "ide-tape: %s: skipping frame, partition version %d\n", tape->name, par->par_desc_ver);
+ return 0;
+ }
+ if (ntohs(par->wrt_pass_cntr) != tape->wrt_pass_cntr) {
+ printk(KERN_INFO "ide-tape: %s: skipping frame, wrt_pass_cntr %d (expected %d)\n", tape->name, ntohs(par->wrt_pass_cntr), tape->wrt_pass_cntr);
+ return 0;
+ }
+ if (aux->frame_seq_num != aux->logical_blk_num) {
+ printk(KERN_INFO "ide-tape: %s: skipping frame, seq != logical\n", tape->name);
+ return 0;
+ }
+ if (logical_blk_num != -1 && ntohl(aux->logical_blk_num) != logical_blk_num) {
+ if (!quiet)
+ printk(KERN_INFO "ide-tape: %s: skipping frame, logical_blk_num %lu (expected %d)\n", tape->name, ntohl(aux->logical_blk_num), logical_blk_num);
+ return 0;
+ }
+ if (aux->frame_type == OS_FRAME_TYPE_MARKER) {
+ rq->errors = IDETAPE_ERROR_FILEMARK;
+ rq->current_nr_sectors = rq->nr_sectors;
}
+ return 1;
+}
+
+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);
-
- 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_switch_buffers (tape, tape->first_stage);
-
- if (rq_ptr->errors != IDETAPE_ERROR_FILEMARK) {
- clear_bit (IDETAPE_FILEMARK, &tape->flags);
- idetape_remove_stage_head (drive);
- } else
- set_bit (IDETAPE_FILEMARK, &tape->flags);
-#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);
}
/*
@@ -2506,84 +3482,341 @@
rq = &new_stage->rq;
ide_init_drive_cmd (rq);
rq->cmd = IDETAPE_WRITE_RQ;
- rq->sector = tape->block_address; /* Doesn't actually matter - We always assume sequential access */
+ rq->sector = tape->first_frame_position; /* Doesn't actually matter - We always assume sequential access */
rq->nr_sectors = rq->current_nr_sectors = blocks;
idetape_switch_buffers (tape, new_stage);
+ idetape_init_stage(drive, new_stage, OS_FRAME_TYPE_DATA, tape->logical_blk_num);
+ tape->logical_blk_num++;
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);
/*
- * Check if we are currently servicing requests in the bottom
- * part of the driver.
+ * 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 not, wait for the pipeline to be full enough (75%) before
- * starting to service requests, so that we will be able to
- * keep up with the higher speeds of the tape.
+ * For the OnStream drive, we can query the number of pending
+ * frames in the drive's internal buffer. As long as the tape
+ * is still writing, it is better to write frames immediately
+ * rather than gather them in the pipeline. This will give the
+ * tape's firmware the ability to sense the current incoming
+ * data rate more accurately, and since the OnStream tape
+ * supports variable speeds, it can try to adjust itself to the
+ * incoming data rate.
*/
- if (!idetape_pipeline_active (tape) && tape->nr_stages >= (3 * tape->max_stages) / 4)
- idetape_insert_pipeline_into_queue (drive);
-
+ 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);
+ } else if (tape->onstream) {
+ idetape_update_stats(drive);
+ if (tape->cur_frames > 5)
+ idetape_insert_pipeline_into_queue (drive);
+ }
+ }
if (test_and_clear_bit (IDETAPE_PIPELINE_ERROR, &tape->flags)) /* Return a deferred error */
return -EIO;
return blocks;
}
-static void idetape_discard_read_pipeline (ide_drive_t *drive)
+/*
+ * 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;
+ 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);
+ }
+}
+
+static void idetape_empty_write_pipeline (ide_drive_t *drive)
+{
+ idetape_tape_t *tape = drive->driver_data;
+ int blocks, i, min;
+ struct buffer_head *bh;
+
#if IDETAPE_DEBUG_BUGS
- if (tape->chrdev_direction != idetape_direction_read) {
- printk (KERN_ERR "ide-tape: bug: Trying to discard read pipeline, but we are not reading.\n");
+ if (tape->chrdev_direction != idetape_direction_write) {
+ printk (KERN_ERR "ide-tape: bug: Trying to empty write pipeline, but we are not writing.\n");
return;
}
+ if (tape->merge_stage_size > tape->stage_size) {
+ printk (KERN_ERR "ide-tape: bug: merge_buffer too big\n");
+ tape->merge_stage_size = tape->stage_size;
+ }
#endif /* IDETAPE_DEBUG_BUGS */
- tape->merge_stage_size = 0;
+ if (tape->merge_stage_size) {
+ blocks=tape->merge_stage_size/tape->tape_block_size;
+ if (tape->merge_stage_size % tape->tape_block_size) {
+ blocks++;
+ i = tape->tape_block_size - tape->merge_stage_size % tape->tape_block_size;
+ bh = tape->bh->b_reqnext;
+ while (bh) {
+ atomic_set(&bh->b_count, 0);
+ bh = bh->b_reqnext;
+ }
+ bh = tape->bh;
+ while (i) {
+ if (bh == NULL) {
+ printk(KERN_INFO "bug, bh NULL\n");
+ break;
+ }
+ min = IDE_MIN(i, 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;
+ }
+ idetape_wait_for_pipeline (drive);
if (tape->merge_stage != NULL) {
__idetape_kfree_stage (tape->merge_stage);
tape->merge_stage = NULL;
}
- tape->chrdev_direction = idetape_direction_none;
-
- if (tape->first_stage == NULL)
- return;
-
- 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);
+ clear_bit (IDETAPE_PIPELINE_ERROR, &tape->flags);
+ tape->chrdev_direction=idetape_direction_none;
- while (tape->first_stage != NULL)
- idetape_remove_stage_head (drive);
- tape->nr_pending_stages = 0;
+ /*
+ * 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);
+ }
+#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->buffer_head = tape->tape_head = tape->cur_frames;
+ 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;
+}
+
+static int idetape_initiate_read(ide_drive_t *drive, int max_stages)
+{
+ idetape_tape_t *tape = drive->driver_data;
+ idetape_stage_t *new_stage;
+ struct request rq;
+ int bytes_read;
+ int blocks = tape->capabilities.ctl;
+
+ if (tape->chrdev_direction != idetape_direction_read) { /* Initialize read operation */
+ if (tape->chrdev_direction == idetape_direction_write) {
+ idetape_empty_write_pipeline (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;
+ }
+#endif /* IDETAPE_DEBUG_BUGS */
+ if ((tape->merge_stage = __idetape_kmalloc_stage (tape, 0, 0)) == NULL)
+ return -ENOMEM;
+ tape->chrdev_direction = idetape_direction_read;
+ tape->logical_blk_num = 0;
+
+ /*
+ * Issue a read 0 command to ensure that DSC handshake
+ * is switched from completion mode to buffer available
+ * mode.
+ */
+ bytes_read = idetape_queue_rw_tail (drive, IDETAPE_READ_RQ, 0, tape->merge_stage->bh);
+ if (bytes_read < 0) {
+ kfree (tape->merge_stage);
+ tape->merge_stage = NULL;
+ tape->chrdev_direction = idetape_direction_none;
+ return bytes_read;
+ }
+ }
+ if (tape->restart_speed_control_req)
+ idetape_restart_speed_control(drive);
+ ide_init_drive_cmd (&rq);
+ rq.cmd = IDETAPE_READ_RQ;
+ 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);
+ } else if (tape->onstream) {
+ idetape_update_stats(drive);
+ if (tape->cur_frames < tape->max_frames - 5)
+ idetape_insert_pipeline_into_queue (drive);
+ }
+ }
+ return 0;
+}
+
+static int idetape_get_logical_blk(ide_drive_t *drive, int logical_blk_num, int max_stages, int quiet)
+{
+ idetape_tape_t *tape = drive->driver_data;
+ unsigned long flags;
+ int cnt = 0, x, position;
+
+ /*
+ * Search and wait for the next logical tape block
+ */
+ while (1) {
+ if (cnt++ > 100) {
+ printk(KERN_INFO "ide-tape: %s: couldn't find logical block %d, aborting\n", tape->name, logical_blk_num);
+ return 0;
+ }
+ idetape_initiate_read(drive, max_stages);
+ if (tape->first_stage == NULL) {
+ if (tape->onstream) {
+#if ONSTREAM_DEBUG
+ printk(KERN_INFO "ide-tape: %s: first_stage == NULL, pipeline error %d\n", tape->name, test_bit(IDETAPE_PIPELINE_ERROR, &tape->flags));
+#endif
+ clear_bit(IDETAPE_PIPELINE_ERROR, &tape->flags);
+ position = idetape_read_position(drive);
+ printk(KERN_INFO "ide-tape: %s: blank block detected, positioning tape to block %d\n", tape->name, position + 60);
+ idetape_position_tape(drive, position + 60, 0, 1);
+ cnt += 40;
+ continue;
+ } else
+ return 0;
+ }
+ idetape_wait_first_stage(drive);
+ if (idetape_verify_stage(drive, tape->first_stage, logical_blk_num, quiet))
+ break;
+ if (tape->first_stage->rq.errors == IDETAPE_ERROR_EOD)
+ cnt--;
+ if (idetape_verify_stage(drive, tape->first_stage, -1, quiet)) {
+ x = ntohl(tape->first_stage->aux->logical_blk_num);
+ if (x > logical_blk_num) {
+ printk(KERN_ERR "ide-tape: %s: couldn't find logical block %d, aborting (block %d found)\n", tape->name, logical_blk_num, x);
+ return 0;
+ }
+ }
+ spin_lock_irqsave(&tape->spinlock, flags);
+ idetape_remove_stage_head(drive);
+ spin_unlock_irqrestore(&tape->spinlock, flags);
+ }
+ if (tape->onstream)
+ tape->logical_blk_num = ntohl(tape->first_stage->aux->logical_blk_num);
+ return 1;
}
/*
- * idetape_wait_for_pipeline will wait until all pending pipeline
- * requests are serviced. Typically called on device close.
+ * 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 void idetape_wait_for_pipeline (ide_drive_t *drive)
+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
+ printk (KERN_INFO "Reached idetape_add_chrdev_read_request, %d blocks\n", blocks);
+#endif /* IDETAPE_DEBUG_LOG */
+
+ /*
+ * Wait for the next logical block to be available at the head
+ * of the pipeline
+ */
+ if (!idetape_get_logical_blk(drive, tape->logical_blk_num, tape->max_stages, 0)) {
+ if (tape->onstream) {
+ set_bit(IDETAPE_READ_ERROR, &tape->flags);
+ return 0;
+ }
+ if (test_bit(IDETAPE_PIPELINE_ERROR, &tape->flags))
+ return 0;
+ return idetape_queue_rw_tail (drive, IDETAPE_READ_RQ, blocks, tape->merge_stage->bh);
+ }
+ 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;
- if (!idetape_pipeline_active (tape))
- idetape_insert_pipeline_into_queue (drive);
- spin_lock_irqsave(&tape->spinlock, flags);
- if (!idetape_pipeline_active (tape))
- goto abort;
+ if (tape->onstream && !tape->raw && tape->first_stage->aux->frame_type == OS_FRAME_TYPE_EOD) {
+#if ONSTREAM_DEBUG
+ printk(KERN_INFO "ide-tape: %s: EOD reached\n", tape->name);
+#endif
+ return 0;
+ }
+ if (rq_ptr->errors == IDETAPE_ERROR_EOD)
+ return 0;
+ else if (rq_ptr->errors == IDETAPE_ERROR_FILEMARK)
+ set_bit (IDETAPE_FILEMARK, &tape->flags);
+ else {
+ idetape_switch_buffers (tape, tape->first_stage);
+ if (rq_ptr->errors == IDETAPE_ERROR_GENERAL) {
+#if ONSTREAM_DEBUG
+ printk(KERN_INFO "error detected, bytes_read %d\n", bytes_read);
+#endif
+ }
+ clear_bit (IDETAPE_FILEMARK, &tape->flags);
+ spin_lock_irqsave(&tape->spinlock, flags);
+ idetape_remove_stage_head (drive);
+ spin_unlock_irqrestore(&tape->spinlock, flags);
+ tape->logical_blk_num++;
+ 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 (tape->last_stage == NULL)
- printk ("ide-tape: tape->last_stage == NULL\n");
- else
+ 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 */
- idetape_wait_for_request(drive, &tape->last_stage->rq);
-abort:
- spin_unlock_irqrestore(&tape->spinlock, flags);
+ return (bytes_read);
}
static void idetape_pad_zeros (ide_drive_t *drive, int bcount)
@@ -2607,54 +3840,6 @@
}
}
-static void idetape_empty_write_pipeline (ide_drive_t *drive)
-{
- idetape_tape_t *tape = drive->driver_data;
- int blocks, i;
-
-#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");
- return;
- }
- if (tape->merge_stage_size > tape->stage_size) {
- printk (KERN_ERR "ide-tape: bug: merge_buffer too big\n");
- tape->merge_stage_size = tape->stage_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) {
- blocks++;
- i = tape->tape_block_size - tape->merge_stage_size % tape->tape_block_size;
- memset (tape->bh->b_data + atomic_read(&tape->bh->b_count), 0, i);
- atomic_add(i, &tape->bh->b_count);
- }
- (void) idetape_add_chrdev_write_request (drive, blocks);
- tape->merge_stage_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\n");
- }
-#endif /* IDETAPE_DEBUG_BUGS */
-}
-
static int idetape_pipeline_size (ide_drive_t *drive)
{
idetape_tape_t *tape = drive->driver_data;
@@ -2676,28 +3861,6 @@
}
/*
- * 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.
- *
- */
-static int idetape_position_tape (ide_drive_t *drive, unsigned int block, byte partition)
-{
- int retval;
- idetape_pc_t pc;
-
- idetape_create_locate_cmd (&pc, block, partition);
- retval=idetape_queue_pc_tail (drive,&pc);
- if (retval) return (retval);
-
- idetape_create_read_position_cmd (&pc);
- return (idetape_queue_pc_tail (drive,&pc));
-}
-
-/*
* Rewinds the tape to the Beginning Of the current Partition (BOP).
*
* We currently support only one partition.
@@ -2706,24 +3869,20 @@
{
int retval;
idetape_pc_t pc;
+ idetape_tape_t *tape = drive->driver_data;
#if IDETAPE_DEBUG_LOG
printk (KERN_INFO "Reached idetape_rewind_tape\n");
#endif /* IDETAPE_DEBUG_LOG */
- idetape_create_rewind_cmd (&pc);
+ idetape_create_rewind_cmd (drive, &pc);
retval=idetape_queue_pc_tail (drive,&pc);
- if (retval) return (retval);
+ if (retval) return retval;
idetape_create_read_position_cmd (&pc);
- return (idetape_queue_pc_tail (drive,&pc));
-}
-
-static int idetape_flush_tape_buffers (ide_drive_t *drive)
-{
- idetape_pc_t pc;
-
- idetape_create_write_filemark_cmd (&pc,0);
- return (idetape_queue_pc_tail (drive,&pc));
+ retval = idetape_queue_pc_tail (drive,&pc);
+ if (retval) return retval;
+ tape->logical_blk_num = 0;
+ return 0;
}
/*
@@ -2792,13 +3951,171 @@
*/
static ide_drive_t *get_drive_ptr (kdev_t i_rdev)
{
- unsigned int i = MINOR(i_rdev) & ~0x80;
+ unsigned int i = MINOR(i_rdev) & ~0xc0;
if (i >= MAX_HWIFS * MAX_DRIVES)
return NULL;
return (idetape_chrdevs[i].drive);
}
+static int idetape_onstream_space_over_filemarks_backward (ide_drive_t *drive,short mt_op,int mt_count)
+{
+ idetape_tape_t *tape = drive->driver_data;
+ int cnt = 0;
+ int last_mark_addr;
+ unsigned long flags;
+
+ if (!idetape_get_logical_blk(drive, -1, 10, 0)) {
+ printk(KERN_INFO "ide-tape: %s: couldn't get logical blk num in space_filemarks_bwd\n", tape->name);
+ return -EIO;
+ }
+ while (cnt != mt_count) {
+ last_mark_addr = ntohl(tape->first_stage->aux->last_mark_addr);
+ if (last_mark_addr == -1)
+ return -EIO;
+#if ONSTREAM_DEBUG
+ printk(KERN_INFO "ide-tape: positioning to last mark at %d\n", last_mark_addr);
+#endif
+ idetape_position_tape(drive, last_mark_addr, 0, 0);
+ cnt++;
+ if (!idetape_get_logical_blk(drive, -1, 10, 0)) {
+ printk(KERN_INFO "ide-tape: %s: couldn't get logical blk num in space_filemarks\n", tape->name);
+ return -EIO;
+ }
+ if (tape->first_stage->aux->frame_type != OS_FRAME_TYPE_MARKER) {
+ printk(KERN_INFO "ide-tape: %s: expected to find marker at block %d, not found\n", tape->name, last_mark_addr);
+ return -EIO;
+ }
+ }
+ if (mt_op == MTBSFM) {
+ spin_lock_irqsave(&tape->spinlock, flags);
+ idetape_remove_stage_head (drive);
+ tape->logical_blk_num++;
+ spin_unlock_irqrestore(&tape->spinlock, flags);
+ }
+ return 0;
+}
+
+/*
+ * ADRL 1.1 compatible "slow" space filemarks fwd version
+ *
+ * Just scans for the filemark sequentially.
+ */
+static int idetape_onstream_space_over_filemarks_forward_slow(ide_drive_t *drive,short mt_op,int mt_count)
+{
+ idetape_tape_t *tape = drive->driver_data;
+ int cnt = 0;
+ unsigned long flags;
+
+ if (!idetape_get_logical_blk(drive, -1, 10, 0)) {
+ printk(KERN_INFO "ide-tape: %s: couldn't get logical blk num in space_filemarks_fwd\n", tape->name);
+ return -EIO;
+ }
+ while (1) {
+ if (!idetape_get_logical_blk(drive, -1, 10, 0)) {
+ printk(KERN_INFO "ide-tape: %s: couldn't get logical blk num in space_filemarks\n", tape->name);
+ return -EIO;
+ }
+ if (tape->first_stage->aux->frame_type == OS_FRAME_TYPE_MARKER)
+ cnt++;
+ if (tape->first_stage->aux->frame_type == OS_FRAME_TYPE_EOD) {
+#if ONSTREAM_DEBUG
+ printk(KERN_INFO "ide-tape: %s: space_fwd: EOD reached\n", tape->name);
+#endif
+ return -EIO;
+ }
+ if (cnt == mt_count)
+ break;
+ spin_lock_irqsave(&tape->spinlock, flags);
+ idetape_remove_stage_head (drive);
+ spin_unlock_irqrestore(&tape->spinlock, flags);
+ }
+ if (mt_op == MTFSF) {
+ spin_lock_irqsave(&tape->spinlock, flags);
+ idetape_remove_stage_head (drive);
+ tape->logical_blk_num++;
+ spin_unlock_irqrestore(&tape->spinlock, flags);
+ }
+ return 0;
+}
+
+
+/*
+ * Fast linux specific version of OnStream FSF
+ */
+static int idetape_onstream_space_over_filemarks_forward_fast(ide_drive_t *drive,short mt_op,int mt_count)
+{
+ idetape_tape_t *tape = drive->driver_data;
+ int cnt = 0, next_mark_addr;
+ unsigned long flags;
+
+ if (!idetape_get_logical_blk(drive, -1, 10, 0)) {
+ printk(KERN_INFO "ide-tape: %s: couldn't get logical blk num in space_filemarks_fwd\n", tape->name);
+ return -EIO;
+ }
+
+ /*
+ * Find nearest (usually previous) marker
+ */
+ while (1) {
+ if (tape->first_stage->aux->frame_type == OS_FRAME_TYPE_MARKER)
+ break;
+ if (tape->first_stage->aux->frame_type == OS_FRAME_TYPE_EOD) {
+#if ONSTREAM_DEBUG
+ printk(KERN_INFO "ide-tape: %s: space_fwd: EOD reached\n", tape->name);
+#endif
+ return -EIO;
+ }
+ if (ntohl(tape->first_stage->aux->filemark_cnt) == 0) {
+ if (tape->first_mark_addr == -1) {
+ printk(KERN_INFO "ide-tape: %s: reverting to slow filemark space\n", tape->name);
+ return idetape_onstream_space_over_filemarks_forward_slow(drive, mt_op, mt_count);
+ }
+ idetape_position_tape(drive, tape->first_mark_addr, 0, 0);
+ if (!idetape_get_logical_blk(drive, -1, 10, 0)) {
+ printk(KERN_INFO "ide-tape: %s: couldn't get logical blk num in space_filemarks_fwd_fast\n", tape->name);
+ return -EIO;
+ }
+ if (tape->first_stage->aux->frame_type != OS_FRAME_TYPE_MARKER) {
+ printk(KERN_INFO "ide-tape: %s: expected to find filemark at %d\n", tape->name, tape->first_mark_addr);
+ return -EIO;
+ }
+ } else {
+ if (idetape_onstream_space_over_filemarks_backward(drive, MTBSF, 1) < 0)
+ return -EIO;
+ mt_count++;
+ }
+ }
+ cnt++;
+ while (cnt != mt_count) {
+ next_mark_addr = ntohl(tape->first_stage->aux->next_mark_addr);
+ if (!next_mark_addr || next_mark_addr > tape->eod_frame_addr) {
+ printk(KERN_INFO "ide-tape: %s: reverting to slow filemark space\n", tape->name);
+ return idetape_onstream_space_over_filemarks_forward_slow(drive, mt_op, mt_count - cnt);
+ }
+#if ONSTREAM_DEBUG
+ else printk(KERN_INFO "ide-tape: positioning to next mark at %d\n", next_mark_addr);
+#endif
+ idetape_position_tape(drive, next_mark_addr, 0, 0);
+ cnt++;
+ if (!idetape_get_logical_blk(drive, -1, 10, 0)) {
+ printk(KERN_INFO "ide-tape: %s: couldn't get logical blk num in space_filemarks\n", tape->name);
+ return -EIO;
+ }
+ if (tape->first_stage->aux->frame_type != OS_FRAME_TYPE_MARKER) {
+ printk(KERN_INFO "ide-tape: %s: expected to find marker at block %d, not found\n", tape->name, next_mark_addr);
+ return -EIO;
+ }
+ }
+ if (mt_op == MTFSF) {
+ spin_lock_irqsave(&tape->spinlock, flags);
+ idetape_remove_stage_head (drive);
+ tape->logical_blk_num++;
+ spin_unlock_irqrestore(&tape->spinlock, flags);
+ }
+ 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
@@ -2814,9 +4131,26 @@
idetape_pc_t pc;
unsigned long flags;
int retval,count=0;
+ int speed_control;
- if (tape->chrdev_direction == idetape_direction_read) {
+ if (tape->onstream) {
+ if (tape->raw)
+ return -EIO;
+ speed_control = tape->speed_control;
+ tape->speed_control = 0;
+ if (mt_op == MTFSF || mt_op == MTFSFM) {
+ if (tape->linux_media)
+ retval = idetape_onstream_space_over_filemarks_forward_fast(drive, mt_op, mt_count);
+ else
+ retval = idetape_onstream_space_over_filemarks_forward_slow(drive, mt_op, mt_count);
+ } else
+ retval = idetape_onstream_space_over_filemarks_backward(drive, mt_op, mt_count);
+ tape->speed_control = speed_control;
+ tape->restart_speed_control_req = 1;
+ return retval;
+ }
+ if (tape->chrdev_direction == idetape_direction_read) {
/*
* We have a read-ahead buffer. Scan it for crossed
* filemarks.
@@ -2824,30 +4158,26 @@
tape->merge_stage_size = 0;
clear_bit (IDETAPE_FILEMARK, &tape->flags);
while (tape->first_stage != NULL) {
- /*
- * Wait until the first read-ahead request
- * is serviced.
- */
- 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);
-
+ idetape_wait_first_stage(drive);
if (tape->first_stage->rq.errors == IDETAPE_ERROR_FILEMARK)
count++;
if (count == mt_count) {
switch (mt_op) {
case MTFSF:
+ spin_lock_irqsave(&tape->spinlock, flags);
idetape_remove_stage_head (drive);
+ spin_unlock_irqrestore(&tape->spinlock, flags);
case MTFSFM:
return (0);
default:
break;
}
}
+ spin_lock_irqsave(&tape->spinlock, flags);
idetape_remove_stage_head (drive);
+ spin_unlock_irqrestore(&tape->spinlock, flags);
}
- idetape_discard_read_pipeline (drive);
+ idetape_discard_read_pipeline (drive, 1);
}
/*
@@ -2903,48 +4233,27 @@
struct inode *inode = file->f_dentry->d_inode;
ide_drive_t *drive = get_drive_ptr (inode->i_rdev);
idetape_tape_t *tape = drive->driver_data;
- ssize_t bytes_read,temp,actually_read=0;
+ ssize_t bytes_read,temp,actually_read=0, rc;
if (ppos != &file->f_pos) {
/* "A request was outside the capabilities of the device." */
return -ENXIO;
}
-
+ if (tape->onstream && (count != tape->tape_block_size)) {
+ printk(KERN_ERR "ide-tape: %s: use %d bytes as block size (%d used)\n", tape->name, tape->tape_block_size, count);
+ return -EINVAL;
+ }
#if IDETAPE_DEBUG_LOG
- printk (KERN_INFO "Reached idetape_chrdev_read\n");
+ printk (KERN_INFO "Reached idetape_chrdev_read, count %d\n", count);
#endif /* IDETAPE_DEBUG_LOG */
-
- if (tape->chrdev_direction != idetape_direction_read) { /* Initialize read operation */
- if (tape->chrdev_direction == idetape_direction_write) {
- idetape_empty_write_pipeline (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;
- }
-#endif /* IDETAPE_DEBUG_BUGS */
- if ((tape->merge_stage = __idetape_kmalloc_stage (tape)) == NULL)
- return -ENOMEM;
- tape->chrdev_direction = idetape_direction_read;
- /*
- * Issue a read 0 command to ensure that DSC handshake
- * is switched from completion mode to buffer available
- * mode.
- */
- bytes_read = idetape_queue_rw_tail (drive, IDETAPE_READ_RQ, 0, tape->merge_stage->bh);
- if (bytes_read < 0) {
- kfree (tape->merge_stage);
- tape->merge_stage = NULL;
- tape->chrdev_direction = idetape_direction_none;
- return bytes_read;
- }
+ 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;
}
+ if ((rc = idetape_initiate_read(drive, tape->max_stages)) < 0)
+ return rc;
if (count==0)
return (0);
if (tape->merge_stage_size) {
@@ -2952,28 +4261,143 @@
idetape_copy_stage_to_user (tape, buf, tape->merge_stage, actually_read);
buf += actually_read; tape->merge_stage_size -= actually_read; count-=actually_read;
}
- while (count >= tape->stage_size) {
- bytes_read=idetape_add_chrdev_read_request (drive, tape->capabilities.ctl);
- if (bytes_read <= 0)
- goto finish;
- idetape_copy_stage_to_user (tape, buf, tape->merge_stage, bytes_read);
- buf += bytes_read; count -= bytes_read; actually_read += bytes_read;
+ while (count >= tape->stage_size) {
+ bytes_read=idetape_add_chrdev_read_request (drive, tape->capabilities.ctl);
+ if (bytes_read <= 0)
+ goto finish;
+ idetape_copy_stage_to_user (tape, buf, tape->merge_stage, bytes_read);
+ buf += bytes_read; count -= bytes_read; actually_read += bytes_read;
+ }
+ if (count) {
+ bytes_read=idetape_add_chrdev_read_request (drive, tape->capabilities.ctl);
+ if (bytes_read <= 0)
+ goto finish;
+ temp=IDE_MIN (count,bytes_read);
+ idetape_copy_stage_to_user (tape, buf, tape->merge_stage, temp);
+ actually_read+=temp;
+ tape->merge_stage_size=bytes_read-temp;
+ }
+finish:
+ if (!actually_read && test_bit (IDETAPE_FILEMARK, &tape->flags)) {
+#if IDETAPE_DEBUG_LOG
+ printk(KERN_INFO "ide-tape: %s: spacing over filemark\n", tape->name);
+#endif
+ idetape_space_over_filemarks (drive, MTFSF, 1);
+ return 0;
+ }
+ if (tape->onstream && !actually_read && test_and_clear_bit(IDETAPE_READ_ERROR, &tape->flags)) {
+ printk(KERN_ERR "ide-tape: %s: unrecovered read error on logical block number %d, skipping\n", tape->name, tape->logical_blk_num);
+ tape->logical_blk_num++;
+ return -EIO;
+ }
+ return actually_read;
+}
+
+static void idetape_update_last_marker(ide_drive_t *drive, int last_mark_addr, int next_mark_addr)
+{
+ idetape_tape_t *tape = drive->driver_data;
+ idetape_stage_t *stage;
+ os_aux_t *aux;
+ int position;
+
+ if (!tape->onstream || tape->raw)
+ return;
+ if (last_mark_addr == -1)
+ return;
+ stage = __idetape_kmalloc_stage(tape, 0, 0);
+ if (stage == NULL)
+ return;
+ idetape_flush_tape_buffers(drive);
+ position = idetape_read_position(drive);
+#if ONSTREAM_DEBUG
+ printk(KERN_INFO "current position (2) %d, lblk %d\n", position, tape->logical_blk_num);
+ printk(KERN_INFO "current position (2) tape block %d\n", tape->last_frame_position);
+#endif
+ idetape_position_tape(drive, last_mark_addr, 0, 0);
+ if (!idetape_queue_rw_tail (drive, IDETAPE_READ_RQ, 1, stage->bh)) {
+ printk(KERN_INFO "ide-tape: %s: couldn't read last marker\n", tape->name);
+ __idetape_kfree_stage (stage);
+ idetape_position_tape(drive, position, 0, 0);
+ return;
+ }
+ aux = stage->aux;
+ if (aux->frame_type != OS_FRAME_TYPE_MARKER) {
+ printk(KERN_INFO "ide-tape: %s: expected to find marker at addr %d\n", tape->name, last_mark_addr);
+ __idetape_kfree_stage (stage);
+ idetape_position_tape(drive, position, 0, 0);
+ return;
+ }
+#if ONSTREAM_DEBUG
+ printk(KERN_INFO "writing back marker\n");
+#endif
+ aux->next_mark_addr = htonl(next_mark_addr);
+ idetape_position_tape(drive, last_mark_addr, 0, 0);
+ if (!idetape_queue_rw_tail (drive, IDETAPE_WRITE_RQ, 1, stage->bh)) {
+ printk(KERN_INFO "ide-tape: %s: couldn't write back marker frame at %d\n", tape->name, last_mark_addr);
+ __idetape_kfree_stage (stage);
+ idetape_position_tape(drive, position, 0, 0);
+ return;
}
- if (count) {
- bytes_read=idetape_add_chrdev_read_request (drive, tape->capabilities.ctl);
- if (bytes_read <= 0)
- goto finish;
- temp=IDE_MIN (count,bytes_read);
- idetape_copy_stage_to_user (tape, buf, tape->merge_stage, temp);
- actually_read+=temp;
- tape->merge_stage_size=bytes_read-temp;
+ __idetape_kfree_stage (stage);
+ idetape_flush_tape_buffers (drive);
+ idetape_position_tape(drive, position, 0, 0);
+ return;
+}
+
+static void __idetape_write_header(ide_drive_t *drive, int block, int cnt)
+{
+ idetape_tape_t *tape = drive->driver_data;
+ idetape_stage_t *stage;
+ os_header_t header;
+
+ stage = __idetape_kmalloc_stage(tape, 1, 1);
+ if (stage == NULL)
+ return;
+ idetape_init_stage(drive, stage, OS_FRAME_TYPE_HEADER, tape->logical_blk_num);
+ idetape_wait_ready(drive, 60 * 5 * HZ);
+ idetape_position_tape(drive, block, 0, 0);
+ memset(&header, 0, sizeof(header));
+ strcpy(header.ident_str, "ADR_SEQ");
+ header.major_rev = header.minor_rev = 1;
+ header.par_num = 1;
+ header.partition.partition_num = OS_DATA_PARTITION;
+ header.partition.par_desc_ver = OS_PARTITION_VERSION;
+ header.partition.first_frame_addr = htonl(0x14);
+ header.partition.last_frame_addr = htonl(19239 * 24);
+ header.partition.wrt_pass_cntr = htons(tape->wrt_pass_cntr);
+ header.partition.eod_frame_addr = htonl(tape->eod_frame_addr);
+ memcpy(stage->bh->b_data, &header, sizeof(header));
+ while (cnt--) {
+ if (!idetape_queue_rw_tail (drive, IDETAPE_WRITE_RQ, 1, stage->bh)) {
+ printk(KERN_INFO "ide-tape: %s: couldn't write header frame\n", tape->name);
+ __idetape_kfree_stage (stage);
+ return;
+ }
}
-finish:
- if (!actually_read && test_bit (IDETAPE_FILEMARK, &tape->flags))
- idetape_space_over_filemarks (drive, MTFSF, 1);
- return (actually_read);
+ __idetape_kfree_stage (stage);
+ idetape_flush_tape_buffers (drive);
}
-
+
+static void idetape_write_header(ide_drive_t *drive, int locate_eod)
+{
+ idetape_tape_t *tape = drive->driver_data;
+
+#if ONSTREAM_DEBUG
+ printk(KERN_INFO "ide-tape: %s: writing tape header\n", tape->name);
+#endif
+ if (!tape->onstream || tape->raw)
+ return;
+ tape->update_frame_cntr++;
+ __idetape_write_header(drive, 5, 5);
+ __idetape_write_header(drive, 0xbb2, 6);
+ if (locate_eod) {
+#if ONSTREAM_DEBUG
+ printk(KERN_INFO "ide-tape: %s: locating back to eod frame addr %d\n", tape->name, tape->eod_frame_addr);
+#endif
+ idetape_position_tape(drive, tape->eod_frame_addr, 0, 0);
+ }
+}
+
static ssize_t idetape_chrdev_write (struct file *file, const char *buf,
size_t count, loff_t *ppos)
{
@@ -2981,30 +4405,59 @@
ide_drive_t *drive = get_drive_ptr (inode->i_rdev);
idetape_tape_t *tape = drive->driver_data;
ssize_t retval,actually_written=0;
+ int position;
if (ppos != &file->f_pos) {
/* "A request was outside the capabilities of the device." */
return -ENXIO;
}
-
+ if (tape->onstream && (count != tape->tape_block_size)) {
+ printk(KERN_ERR "ide-tape: %s: use %d bytes as block size (%d used)\n", tape->name, tape->tape_block_size, count);
+ return -EINVAL;
+ }
#if IDETAPE_DEBUG_LOG
- printk (KERN_INFO "Reached idetape_chrdev_write\n");
+ printk (KERN_INFO "Reached idetape_chrdev_write, count %d\n", count);
#endif /* IDETAPE_DEBUG_LOG */
if (tape->chrdev_direction != idetape_direction_write) { /* Initialize write operation */
if (tape->chrdev_direction == idetape_direction_read)
- idetape_discard_read_pipeline (drive);
+ 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 should be 0 now\n");
tape->merge_stage_size = 0;
}
#endif /* IDETAPE_DEBUG_BUGS */
- if ((tape->merge_stage = __idetape_kmalloc_stage (tape)) == NULL)
+ if ((tape->merge_stage = __idetape_kmalloc_stage (tape, 0, 0)) == NULL)
return -ENOMEM;
tape->chrdev_direction = idetape_direction_write;
idetape_init_merge_stage (tape);
+ if (tape->onstream) {
+ position = idetape_read_position(drive);
+ if (position <= 20) {
+ tape->logical_blk_num = 0;
+ tape->wrt_pass_cntr++;
+#if ONSTREAM_DEBUG
+ printk(KERN_INFO "ide-tape: %s: logical block num 0, setting eod to 20\n", tape->name);
+ printk(KERN_INFO "ide-tape: %s: allocating new write pass counter %d\n", tape->name, tape->wrt_pass_cntr);
+#endif
+ tape->filemark_cnt = 0;
+ tape->eod_frame_addr = 20;
+ tape->first_mark_addr = tape->last_mark_addr = -1;
+ idetape_write_header(drive, 1);
+ }
+#if ONSTREAM_DEBUG
+ printk(KERN_INFO "ide-tape: %s: positioning tape to eod at %d\n", tape->name, tape->eod_frame_addr);
+#endif
+ position = idetape_read_position(drive);
+ if (position != tape->eod_frame_addr)
+ idetape_position_tape(drive, tape->eod_frame_addr, 0, 0);
+#if ONSTREAM_DEBUG
+ printk(KERN_INFO "ide-tape: %s: first_frame_position %d\n", tape->name, tape->first_frame_position);
+#endif
+ }
+
/*
* Issue a write 0 command to ensure that DSC handshake
* is switched from completion mode to buffer available
@@ -3017,12 +4470,14 @@
tape->chrdev_direction = idetape_direction_none;
return retval;
}
- 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;
+#if ONSTREAM_DEBUG
+ printk("ide-tape: first_frame_position %d\n", tape->first_frame_position);
+#endif
}
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) {
@@ -3057,6 +4512,90 @@
return (actually_written);
}
+static int idetape_write_filemark(ide_drive_t *drive)
+{
+ idetape_tape_t *tape = drive->driver_data;
+ int last_mark_addr;
+ idetape_pc_t pc;
+
+ if (!tape->onstream) {
+ idetape_create_write_filemark_cmd(drive, &pc,1); /* Write a filemark */
+ if (idetape_queue_pc_tail (drive,&pc)) {
+ printk (KERN_ERR "ide-tape: Couldn't write a filemark\n");
+ return -EIO;
+ }
+ } else if (!tape->raw) {
+ last_mark_addr = idetape_read_position(drive);
+ tape->merge_stage = __idetape_kmalloc_stage (tape, 1, 0);
+ if (tape->merge_stage != NULL) {
+ idetape_init_stage(drive, tape->merge_stage, OS_FRAME_TYPE_MARKER, tape->logical_blk_num);
+ idetape_pad_zeros (drive, tape->stage_size);
+ tape->logical_blk_num++;
+ __idetape_kfree_stage (tape->merge_stage);
+ tape->merge_stage = NULL;
+ }
+ if (tape->filemark_cnt)
+ idetape_update_last_marker(drive, tape->last_mark_addr, last_mark_addr);
+ tape->last_mark_addr = last_mark_addr;
+ if (tape->filemark_cnt++ == 0)
+ tape->first_mark_addr = last_mark_addr;
+ }
+ return 0;
+}
+
+static void idetape_write_eod(ide_drive_t *drive)
+{
+ idetape_tape_t *tape = drive->driver_data;
+
+ if (!tape->onstream || tape->raw)
+ return;
+ tape->merge_stage = __idetape_kmalloc_stage (tape, 1, 0);
+ if (tape->merge_stage != NULL) {
+ tape->eod_frame_addr = idetape_read_position(drive);
+ idetape_init_stage(drive, tape->merge_stage, OS_FRAME_TYPE_EOD, tape->logical_blk_num);
+ idetape_pad_zeros (drive, tape->stage_size);
+ __idetape_kfree_stage (tape->merge_stage);
+ tape->merge_stage = NULL;
+ }
+ return;
+}
+
+int idetape_seek_logical_blk(ide_drive_t *drive, int logical_blk_num)
+{
+ idetape_tape_t *tape = drive->driver_data;
+ int estimated_address = logical_blk_num + 20;
+ int retries = 0;
+ int speed_control;
+
+ speed_control = tape->speed_control;
+ tape->speed_control = 0;
+ if (logical_blk_num < 0)
+ logical_blk_num = 0;
+ if (idetape_get_logical_blk(drive, logical_blk_num, 10, 1))
+ goto ok;
+ while (++retries < 10) {
+ idetape_discard_read_pipeline(drive, 0);
+ idetape_position_tape(drive, estimated_address, 0, 0);
+ if (idetape_get_logical_blk(drive, logical_blk_num, 10, 1))
+ goto ok;
+ if (!idetape_get_logical_blk(drive, -1, 10, 1))
+ goto error;
+ if (tape->logical_blk_num < logical_blk_num)
+ estimated_address += logical_blk_num - tape->logical_blk_num;
+ else
+ break;
+ }
+error:
+ tape->speed_control = speed_control;
+ tape->restart_speed_control_req = 1;
+ printk(KERN_INFO "ide-tape: %s: couldn't seek to logical block %d (at %d), %d retries\n", tape->name, logical_blk_num, tape->logical_blk_num, retries);
+ return -EIO;
+ok:
+ tape->speed_control = speed_control;
+ tape->restart_speed_control_req = 1;
+ return 0;
+}
+
/*
* idetape_mtioctop is called from idetape_chrdev_ioctl when
* the general mtio MTIOCTOP ioctl is requested.
@@ -3111,9 +4650,13 @@
*
* MTSETPART - Switches to another tape partition.
*
+ * MTLOCK - Locks the tape door.
+ *
+ * MTUNLOCK - Unlocks the tape door.
+ *
* The following commands are currently not supported:
*
- * MTFSR, MTBSR, MTFSS, MTBSS, MTWSM, MTSETDENSITY,
+ * 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)
@@ -3139,43 +4682,75 @@
default:
break;
}
-
- /*
- * Empty the pipeline.
- */
- if (tape->chrdev_direction == idetape_direction_read)
- idetape_discard_read_pipeline (drive);
-
switch (mt_op) {
case MTWEOF:
- for (i=0;i<mt_count;i++) {
- idetape_create_write_filemark_cmd (&pc,1);
- retval=idetape_queue_pc_tail (drive,&pc);
- if (retval) return (retval);
+ 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:
- return (idetape_rewind_tape (drive));
+ idetape_discard_read_pipeline (drive, 0);
+ if (idetape_rewind_tape(drive))
+ return -EIO;
+ if (tape->onstream && !tape->raw)
+ return idetape_position_tape(drive, 20, 0, 0);
+ return 0;
case MTLOAD:
- idetape_create_load_unload_cmd (&pc, IDETAPE_LU_LOAD_MASK);
+ 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:
- idetape_create_load_unload_cmd (&pc,!IDETAPE_LU_LOAD_MASK);
+ 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 MTNOP:
+ idetape_discard_read_pipeline (drive, 0);
return (idetape_flush_tape_buffers (drive));
case MTRETEN:
- idetape_create_load_unload_cmd (&pc,IDETAPE_LU_RETENSION_MASK | IDETAPE_LU_LOAD_MASK);
+ 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:
+ if (tape->onstream) {
+#if ONSTREAM_DEBUG
+ printk(KERN_INFO "ide-tape: %s: positioning tape to eod at %d\n", tape->name, tape->eod_frame_addr);
+#endif
+ idetape_position_tape(drive, tape->eod_frame_addr, 0, 0);
+ if (!idetape_get_logical_blk(drive, -1, 10, 0))
+ return -EIO;
+ if (tape->first_stage->aux->frame_type != OS_FRAME_TYPE_EOD)
+ return -EIO;
+ return 0;
+ }
idetape_create_space_cmd (&pc,0,IDETAPE_SPACE_TO_EOD);
return (idetape_queue_pc_tail (drive,&pc));
case MTERASE:
+ if (tape->onstream) {
+ tape->eod_frame_addr = 20;
+ tape->logical_blk_num = 0;
+ tape->first_mark_addr = tape->last_mark_addr = -1;
+ idetape_position_tape(drive, tape->eod_frame_addr, 0, 0);
+ idetape_write_eod(drive);
+ idetape_flush_tape_buffers (drive);
+ idetape_write_header(drive, 0);
+ idetape_flush_tape_buffers (drive);
+ (void) idetape_rewind_tape (drive);
+ return 0;
+ }
(void) idetape_rewind_tape (drive);
idetape_create_erase_cmd (&pc);
return (idetape_queue_pc_tail (drive,&pc));
case MTSETBLK:
+ if (tape->onstream) {
+ if (mt_count != tape->tape_block_size) {
+ printk(KERN_INFO "ide-tape: %s: MTSETBLK %d -- only %d bytes block size supported\n", tape->name, mt_count, tape->tape_block_size);
+ return -EINVAL;
+ }
+ return 0;
+ }
if (mt_count) {
if (mt_count < tape->tape_block_size || mt_count % tape->tape_block_size)
return -EIO;
@@ -3185,9 +4760,40 @@
set_bit (IDETAPE_DETECT_BS, &tape->flags);
return 0;
case MTSEEK:
- return (idetape_position_tape (drive, mt_count * tape->user_bs_factor, tape->partition));
+ if (!tape->onstream || tape->raw) {
+ idetape_discard_read_pipeline (drive, 0);
+ return idetape_position_tape (drive, mt_count * tape->user_bs_factor, tape->partition, 0);
+ }
+ return idetape_seek_logical_blk(drive, mt_count);
case MTSETPART:
- return (idetape_position_tape (drive, 0, mt_count));
+ idetape_discard_read_pipeline (drive, 0);
+ if (tape->onstream)
+ return -EIO;
+ return (idetape_position_tape (drive, 0, mt_count, 0));
+ case MTFSR:
+ case MTBSR:
+ if (tape->onstream) {
+ if (!idetape_get_logical_blk(drive, -1, 10, 0))
+ return -EIO;
+ if (mt_op == MTFSR)
+ return idetape_seek_logical_blk(drive, tape->logical_blk_num + mt_count);
+ else {
+ idetape_discard_read_pipeline (drive, 0);
+ return idetape_seek_logical_blk(drive, tape->logical_blk_num - mt_count);
+ }
+ }
+ case MTLOCK:
+ idetape_create_prevent_cmd(drive, &pc, 1);
+ retval = idetape_queue_pc_tail (drive,&pc);
+ if (retval) return retval;
+ tape->door_locked = DOOR_EXPLICITLY_LOCKED;
+ return 0;
+ case MTUNLOCK:
+ idetape_create_prevent_cmd(drive, &pc, 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);
@@ -3221,25 +4827,24 @@
{
ide_drive_t *drive = get_drive_ptr (inode->i_rdev);
idetape_tape_t *tape = drive->driver_data;
- idetape_pc_t pc;
struct mtop mtop;
struct mtget mtget;
struct mtpos mtpos;
- int retval, block_offset = 0;
+ int block_offset = 0, position = tape->first_frame_position;
#if IDETAPE_DEBUG_LOG
printk (KERN_INFO "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);
idetape_flush_tape_buffers (drive);
}
if (cmd == MTIOCGET || cmd == MTIOCPOS) {
block_offset = idetape_pipeline_size (drive) / (tape->tape_block_size * tape->user_bs_factor);
- idetape_create_read_position_cmd (&pc);
- retval=idetape_queue_pc_tail (drive,&pc);
- if (retval) return (retval);
+ if ((position = idetape_read_position(drive)) < 0)
+ return -EIO;
}
switch (cmd) {
case MTIOCTOP:
@@ -3248,23 +4853,132 @@
return (idetape_mtioctop (drive,mtop.mt_op,mtop.mt_count));
case MTIOCGET:
memset (&mtget, 0, sizeof (struct mtget));
- mtget.mt_blkno = tape->block_address / tape->user_bs_factor - block_offset;
+ mtget.mt_type = MT_ISSCSI2;
+ if (!tape->onstream || tape->raw)
+ mtget.mt_blkno = position / tape->user_bs_factor - block_offset;
+ else {
+ if (!idetape_get_logical_blk(drive, -1, 10, 0))
+ mtget.mt_blkno = -1;
+ else
+ mtget.mt_blkno = tape->logical_blk_num;
+ }
mtget.mt_dsreg = ((tape->tape_block_size * tape->user_bs_factor) << MT_ST_BLKSIZE_SHIFT) & MT_ST_BLKSIZE_MASK;
+ if (tape->onstream) {
+ mtget.mt_gstat |= GMT_ONLINE(0xffffffff);
+ if (tape->first_stage && tape->first_stage->aux->frame_type == OS_FRAME_TYPE_EOD)
+ mtget.mt_gstat |= GMT_EOD(0xffffffff);
+ if (position <= 20)
+ mtget.mt_gstat |= GMT_BOT(0xffffffff);
+ }
if (copy_to_user ((char *) arg,(char *) &mtget, sizeof (struct mtget)))
return -EFAULT;
return 0;
case MTIOCPOS:
- mtpos.mt_blkno = tape->block_address / tape->user_bs_factor - block_offset;
+ if (tape->onstream && !tape->raw) {
+ if (!idetape_get_logical_blk(drive, -1, 10, 0))
+ return -EIO;
+ mtpos.mt_blkno = tape->logical_blk_num;
+ } else
+ mtpos.mt_blkno = position / tape->user_bs_factor - block_offset;
if (copy_to_user ((char *) arg,(char *) &mtpos, sizeof (struct mtpos)))
return -EFAULT;
return 0;
default:
if (tape->chrdev_direction == idetape_direction_read)
- idetape_discard_read_pipeline (drive);
+ idetape_discard_read_pipeline (drive, 1);
return (idetape_blkdev_ioctl (drive,inode,file,cmd,arg));
}
}
+static int __idetape_analyze_headers(ide_drive_t *drive, int block)
+{
+ idetape_tape_t *tape = drive->driver_data;
+ idetape_stage_t *stage;
+ os_header_t *header;
+ os_aux_t *aux;
+
+ if (!tape->onstream || tape->raw) {
+ tape->header_ok = tape->linux_media = 1;
+ return 1;
+ }
+ tape->header_ok = tape->linux_media = 0;
+ tape->update_frame_cntr = 0;
+ tape->wrt_pass_cntr = 0;
+ tape->eod_frame_addr = 20;
+ tape->first_mark_addr = tape->last_mark_addr = -1;
+ stage = __idetape_kmalloc_stage (tape, 0, 0);
+ if (stage == NULL)
+ return 0;
+#if ONSTREAM_DEBUG
+ printk(KERN_INFO "ide-tape: %s: reading header\n", tape->name);
+#endif
+ idetape_position_tape(drive, block, 0, 0);
+ if (!idetape_queue_rw_tail (drive, IDETAPE_READ_RQ, 1, stage->bh)) {
+ printk(KERN_INFO "ide-tape: %s: couldn't read header frame\n", tape->name);
+ __idetape_kfree_stage (stage);
+ return 0;
+ }
+ header = (os_header_t *) stage->bh->b_data;
+ aux = stage->aux;
+ if (strncmp(header->ident_str, "ADR_SEQ", 7) != 0) {
+ printk(KERN_INFO "ide-tape: %s: invalid header identification string\n", tape->name);
+ __idetape_kfree_stage (stage);
+ return 0;
+ }
+ if (header->major_rev != 1 || header->minor_rev != 1)
+ printk(KERN_INFO "ide-tape: warning: revision %d.%d detected (1.1 supported)\n", header->major_rev, header->minor_rev);
+ if (header->par_num != 1)
+ printk(KERN_INFO "ide-tape: warning: %d partitions defined, only one supported\n", header->par_num);
+ tape->wrt_pass_cntr = ntohs(header->partition.wrt_pass_cntr);
+ tape->eod_frame_addr = ntohl(header->partition.eod_frame_addr);
+ tape->filemark_cnt = ntohl(aux->filemark_cnt);
+ tape->first_mark_addr = ntohl(aux->next_mark_addr);
+ tape->last_mark_addr = ntohl(aux->last_mark_addr);
+ tape->update_frame_cntr = ntohl(aux->update_frame_cntr);
+ memcpy(tape->application_sig, aux->application_sig, 4); tape->application_sig[4] = 0;
+ if (memcmp(tape->application_sig, "LIN", 3) == 0) {
+ tape->linux_media = 1;
+ tape->linux_media_version = tape->application_sig[3] - '0';
+ if (tape->linux_media_version != 3)
+ printk(KERN_INFO "ide-tape: %s: Linux media version %d detected (current 3)\n", tape->name, tape->linux_media_version);
+ } else {
+ printk(KERN_INFO "ide-tape: %s: non Linux media detected (%s)\n", tape->name, tape->application_sig);
+ tape->linux_media = 0;
+ }
+#if ONSTREAM_DEBUG
+ printk(KERN_INFO "ide-tape: %s: detected write pass counter %d, eod frame addr %d\n", tape->name, tape->wrt_pass_cntr, tape->eod_frame_addr);
+#endif
+ __idetape_kfree_stage (stage);
+ return 1;
+}
+
+static int idetape_analyze_headers(ide_drive_t *drive)
+{
+ idetape_tape_t *tape = drive->driver_data;
+ int position, block;
+
+ if (!tape->onstream || tape->raw) {
+ tape->header_ok = tape->linux_media = 1;
+ return 1;
+ }
+ tape->header_ok = tape->linux_media = 0;
+ position = idetape_read_position(drive);
+ for (block = 5; block < 10; block++)
+ if (__idetape_analyze_headers(drive, block))
+ goto ok;
+ for (block = 0xbb2; block < 0xbb8; block++)
+ if (__idetape_analyze_headers(drive, block))
+ goto ok;
+ printk(KERN_ERR "ide-tape: %s: failed to find valid ADRL header\n", tape->name);
+ return 0;
+ok:
+ if (position < 20)
+ position = 20;
+ idetape_position_tape(drive, position, 0, 0);
+ tape->header_ok = 1;
+ return 1;
+}
+
/*
* Our character device open function.
*/
@@ -3273,6 +4987,7 @@
ide_drive_t *drive;
idetape_tape_t *tape;
idetape_pc_t pc;
+ unsigned int minor=MINOR (inode->i_rdev);
#if IDETAPE_DEBUG_LOG
printk (KERN_INFO "Reached idetape_chrdev_open\n");
@@ -3285,14 +5000,41 @@
if (test_and_set_bit (IDETAPE_BUSY, &tape->flags))
return -EBUSY;
MOD_INC_USE_COUNT;
- idetape_create_read_position_cmd (&pc);
- (void) idetape_queue_pc_tail (drive,&pc);
- if (!test_bit (IDETAPE_ADDRESS_VALID, &tape->flags))
- (void) idetape_rewind_tape (drive);
+ if (!tape->onstream) {
+ idetape_read_position(drive);
+ if (!test_bit (IDETAPE_ADDRESS_VALID, &tape->flags))
+ (void) idetape_rewind_tape (drive);
+ } else {
+ if (minor & 64) {
+ tape->tape_block_size = tape->stage_size = 32768 + 512;
+ tape->raw = 1;
+ } else {
+ tape->tape_block_size = tape->stage_size = 32768;
+ tape->raw = 0;
+ }
+ }
+ if (idetape_wait_ready(drive, 60 * HZ)) {
+ clear_bit(IDETAPE_BUSY, &tape->flags);
+ MOD_DEC_USE_COUNT;
+ printk(KERN_ERR "ide-tape: %s: drive not ready\n", tape->name);
+ return -EBUSY;
+ }
+ idetape_read_position(drive);
MOD_DEC_USE_COUNT;
+ clear_bit (IDETAPE_PIPELINE_ERROR, &tape->flags);
- if (tape->chrdev_direction == idetape_direction_none)
+ if (tape->chrdev_direction == idetape_direction_none) {
MOD_INC_USE_COUNT;
+ 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;
+ }
+ idetape_analyze_headers(drive);
+ }
+ tape->max_frames = tape->cur_frames = tape->req_buffer_fill = 0;
+ idetape_restart_speed_control(drive);
+ tape->restart_speed_control_req = 0;
return 0;
}
@@ -3303,8 +5045,8 @@
{
ide_drive_t *drive = get_drive_ptr (inode->i_rdev);
idetape_tape_t *tape = drive->driver_data;
- unsigned int minor=MINOR (inode->i_rdev);
idetape_pc_t pc;
+ unsigned int minor=MINOR (inode->i_rdev);
#if IDETAPE_DEBUG_LOG
printk (KERN_INFO "Reached idetape_chrdev_release\n");
@@ -3312,19 +5054,21 @@
if (tape->chrdev_direction == idetape_direction_write) {
idetape_empty_write_pipeline (drive);
- tape->merge_stage = __idetape_kmalloc_stage (tape);
+ 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;
}
- idetape_create_write_filemark_cmd (&pc,1); /* Write a filemark */
- if (idetape_queue_pc_tail (drive,&pc))
- printk (KERN_ERR "ide-tape: Couldn't write a filemark\n");
+ idetape_write_filemark(drive);
+ idetape_write_eod(drive);
+ idetape_flush_tape_buffers (drive);
+ idetape_write_header(drive, minor >= 128);
+ idetape_flush_tape_buffers (drive);
}
if (tape->chrdev_direction == idetape_direction_read) {
if (minor < 128)
- idetape_discard_read_pipeline (drive);
+ idetape_discard_read_pipeline (drive, 1);
else
idetape_wait_for_pipeline (drive);
}
@@ -3334,10 +5078,15 @@
}
if (minor < 128)
(void) idetape_rewind_tape (drive);
-
- clear_bit (IDETAPE_BUSY, &tape->flags);
- if (tape->chrdev_direction == idetape_direction_none)
+ if (tape->chrdev_direction == idetape_direction_none) {
+ if (tape->door_locked != DOOR_EXPLICITLY_LOCKED) {
+ idetape_create_prevent_cmd(drive, &pc, 0);
+ if (!idetape_queue_pc_tail (drive,&pc))
+ tape->door_locked = DOOR_UNLOCKED;
+ }
MOD_DEC_USE_COUNT;
+ }
+ clear_bit (IDETAPE_BUSY, &tape->flags);
return 0;
}
@@ -3353,16 +5102,16 @@
static int idetape_identify_device (ide_drive_t *drive,struct hd_driveid *id)
{
struct idetape_id_gcw gcw;
-#if IDETAPE_INFO_LOG
+#if IDETAPE_DEBUG_LOG
unsigned short mask,i;
-#endif /* IDETAPE_INFO_LOG */
+#endif /* IDETAPE_DEBUG_LOG */
if (!id)
return 0;
*((unsigned short *) &gcw) = id->config;
-#if IDETAPE_INFO_LOG
+#if IDETAPE_DEBUG_LOG
printk (KERN_INFO "Dumping ATAPI Identify Device tape parameters\n");
printk (KERN_INFO "Protocol Type: ");
switch (gcw.protocol) {
@@ -3450,7 +5199,7 @@
} else
printk (KERN_INFO "According to the device, fields 64-70 are not valid.\n");
-#endif /* IDETAPE_INFO_LOG */
+#endif /* IDETAPE_DEBUG_LOG */
/* Check that we can support this device */
@@ -3470,6 +5219,153 @@
}
/*
+ * Notify vendor ID to the OnStream tape drive
+ */
+static void idetape_onstream_set_vendor(ide_drive_t *drive, char *vendor)
+{
+ idetape_pc_t pc;
+ idetape_mode_parameter_header_t *header;
+
+ idetape_create_mode_select_cmd(&pc, sizeof(*header) + 8);
+ pc.buffer[0] = 3 + 8; /* Mode Data Length */
+ pc.buffer[1] = 0; /* Medium Type - ignoring */
+ pc.buffer[2] = 0; /* Reserved */
+ pc.buffer[3] = 0; /* Block Descriptor Length */
+ pc.buffer[4 + 0] = 0x36 | (1 << 7);
+ pc.buffer[4 + 1] = 6;
+ pc.buffer[4 + 2] = vendor[0];
+ pc.buffer[4 + 3] = vendor[1];
+ pc.buffer[4 + 4] = vendor[2];
+ pc.buffer[4 + 5] = vendor[3];
+ pc.buffer[4 + 6] = 0;
+ pc.buffer[4 + 7] = 0;
+ if (idetape_queue_pc_tail (drive,&pc))
+ printk (KERN_ERR "ide-tape: Couldn't set vendor name to %s\n", vendor);
+
+}
+
+/*
+ * Various unused OnStream commands
+ */
+#if ONSTREAM_DEBUG
+static void idetape_onstream_set_retries(ide_drive_t *drive, int retries)
+{
+ idetape_pc_t pc;
+
+ idetape_create_mode_select_cmd(&pc, sizeof(idetape_mode_parameter_header_t) + 4);
+ pc.buffer[0] = 3 + 4;
+ pc.buffer[1] = 0; /* Medium Type - ignoring */
+ pc.buffer[2] = 0; /* Reserved */
+ pc.buffer[3] = 0; /* Block Descriptor Length */
+ pc.buffer[4 + 0] = 0x2f | (1 << 7);
+ pc.buffer[4 + 1] = 2;
+ pc.buffer[4 + 2] = 4;
+ pc.buffer[4 + 3] = retries;
+ if (idetape_queue_pc_tail (drive,&pc))
+ printk (KERN_ERR "ide-tape: Couldn't set retries to %d\n", retries);
+}
+#endif
+
+/*
+ * Configure 32.5KB block size.
+ */
+static void idetape_onstream_configure_block_size(ide_drive_t *drive)
+{
+ idetape_pc_t pc;
+ idetape_mode_parameter_header_t *header;
+ idetape_block_size_page_t *bs;
+
+ /*
+ * Get the current block size from the block size mode page
+ */
+ idetape_create_mode_sense_cmd (&pc,IDETAPE_BLOCK_SIZE_PAGE);
+ if (idetape_queue_pc_tail (drive,&pc))
+ printk (KERN_ERR "ide-tape: can't get tape block size mode page\n");
+ header = (idetape_mode_parameter_header_t *) pc.buffer;
+ bs = (idetape_block_size_page_t *) (pc.buffer + sizeof(idetape_mode_parameter_header_t) + header->bdl);
+
+#if IDETAPE_DEBUG_LOG
+ printk(KERN_INFO "32KB play back: %s\n", bs->play32 ? "Yes" : "No");
+ printk(KERN_INFO "32.5KB play back: %s\n", bs->play32_5 ? "Yes" : "No");
+ printk(KERN_INFO "32KB record: %s\n", bs->record32 ? "Yes" : "No");
+ printk(KERN_INFO "32.5KB record: %s\n", bs->record32_5 ? "Yes" : "No");
+#endif
+
+ /*
+ * Configure default auto columns mode, 32.5KB block size
+ */
+ bs->one = 1;
+ bs->play32 = 0;
+ bs->play32_5 = 1;
+ bs->record32 = 0;
+ bs->record32_5 = 1;
+ idetape_create_mode_select_cmd(&pc, sizeof(*header) + sizeof(*bs));
+ if (idetape_queue_pc_tail (drive,&pc))
+ printk (KERN_ERR "ide-tape: Couldn't set tape block size mode page\n");
+
+#if ONSTREAM_DEBUG
+ /*
+ * In debug mode, we want to see as many errors as possible
+ * to test the error recovery mechanism.
+ */
+ idetape_onstream_set_retries(drive, 0);
+#endif
+}
+
+/*
+ * Use INQUIRY to get the firmware revision
+ */
+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;
+
+ 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);
+ 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';
+ else if (tape->onstream)
+ tape->firmware_revision_num = (*r - '0') * 100 + (*(r + 1) - '0') * 10 + *(r + 2) - '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);
+}
+
+/*
+ * Configure the OnStream ATAPI tape drive for default operation
+ */
+static void idetape_configure_onstream(ide_drive_t *drive)
+{
+ idetape_tape_t *tape = drive->driver_data;
+
+ if (tape->firmware_revision_num < 105) {
+ printk("ide-tape: %s: Old OnStream firmware revision detected (%s)\n", tape->name, tape->firmware_revision);
+ printk("ide-tape: %s: An upgrade to version 1.05 or above is recommended\n", tape->name);
+ }
+
+ /*
+ * Configure 32.5KB (data+aux) block size.
+ */
+ idetape_onstream_configure_block_size(drive);
+
+ /*
+ * Set vendor name to 'LIN3' for "Linux support version 3".
+ */
+ idetape_onstream_set_vendor(drive, "LIN3");
+}
+
+/*
* 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.
@@ -3497,17 +5393,23 @@
capabilities->buffer_size = ntohs (capabilities->buffer_size);
if (!capabilities->speed) {
- printk("ide-tape: %s: overriding capabilities->speed (assuming 650KB/sec)\n", drive->name);
+ printk(KERN_INFO "ide-tape: %s: overriding capabilities->speed (assuming 650KB/sec)\n", drive->name);
capabilities->speed = 650;
}
if (!capabilities->max_speed) {
- printk("ide-tape: %s: overriding capabilities->max_speed (assuming 650KB/sec)\n", drive->name);
+ printk(KERN_INFO "ide-tape: %s: overriding capabilities->max_speed (assuming 650KB/sec)\n", drive->name);
capabilities->max_speed = 650;
}
tape->capabilities = *capabilities; /* Save us a copy */
- tape->tape_block_size = capabilities->blk512 ? 512:1024;
-#if IDETAPE_INFO_LOG
+ if (capabilities->blk512)
+ tape->tape_block_size = 512;
+ else if (capabilities->blk1024)
+ tape->tape_block_size = 1024;
+ else if (tape->onstream && capabilities->blk32768)
+ tape->tape_block_size = 32768;
+
+#if IDETAPE_DEBUG_LOG
printk (KERN_INFO "Dumping the results of the MODE SENSE packet command\n");
printk (KERN_INFO "Mode Parameter Header:\n");
printk (KERN_INFO "Mode Data Length - %d\n",header->mode_data_length);
@@ -3530,12 +5432,12 @@
printk (KERN_INFO "Supports data compression - %s\n",capabilities->cmprs ? "Yes":"No");
printk (KERN_INFO "Supports 512 bytes block size - %s\n",capabilities->blk512 ? "Yes":"No");
printk (KERN_INFO "Supports 1024 bytes block size - %s\n",capabilities->blk1024 ? "Yes":"No");
- printk (KERN_INFO "Restricted byte count for PIO transfers - %s\n",capabilities->slowb ? "Yes":"No");
+ printk (KERN_INFO "Supports 32768 bytes block size / Restricted byte count for PIO transfers - %s\n",capabilities->blk32768 ? "Yes":"No");
printk (KERN_INFO "Maximum supported speed in KBps - %d\n",capabilities->max_speed);
printk (KERN_INFO "Continuous transfer limits in blocks - %d\n",capabilities->ctl);
printk (KERN_INFO "Current speed in KBps - %d\n",capabilities->speed);
printk (KERN_INFO "Buffer size - %d\n",capabilities->buffer_size*512);
-#endif /* IDETAPE_INFO_LOG */
+#endif /* IDETAPE_DEBUG_LOG */
}
static void idetape_add_settings(ide_drive_t *drive)
@@ -3546,14 +5448,27 @@
* 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, 0, 0xffff, tape->stage_size / 1024, 1, &tape->min_pipeline, NULL);
- ide_add_setting(drive, "pipeline", SETTING_RW, -1, -1, TYPE_INT, 0, 0xffff, tape->stage_size / 1024, 1, &tape->max_stages, NULL);
- ide_add_setting(drive, "pipeline_max", SETTING_RW, -1, -1, TYPE_INT, 0, 0xffff, tape->stage_size / 1024, 1, &tape->max_pipeline, NULL);
+ ide_add_setting(drive, "pipeline_min", SETTING_RW, -1, -1, TYPE_INT, 2, 0xffff, tape->stage_size / 1024, 1, &tape->min_pipeline, NULL);
+ ide_add_setting(drive, "pipeline", SETTING_RW, -1, -1, TYPE_INT, 2, 0xffff, tape->stage_size / 1024, 1, &tape->max_stages, NULL);
+ ide_add_setting(drive, "pipeline_max", SETTING_RW, -1, -1, TYPE_INT, 2, 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);
+ if (tape->onstream) {
+ ide_add_setting(drive, "cur_frames", SETTING_READ, -1, -1, TYPE_SHORT, 0, 0xffff, 1, 1, &tape->cur_frames, NULL);
+ ide_add_setting(drive, "max_frames", SETTING_READ, -1, -1, TYPE_SHORT, 0, 0xffff, 1, 1, &tape->max_frames, NULL);
+ ide_add_setting(drive, "insert_speed", SETTING_READ, -1, -1, TYPE_INT, 0, 0xffff, 1, 1, &tape->insert_speed, NULL);
+ ide_add_setting(drive, "speed_control",SETTING_RW, -1, -1, TYPE_INT, 0, 0xffff, 1, 1, &tape->speed_control, NULL);
+ ide_add_setting(drive, "tape_still_time",SETTING_READ, -1, -1, TYPE_INT, 0, 0xffff, 1, 1, &tape->tape_still_time, NULL);
+ ide_add_setting(drive, "max_insert_speed",SETTING_RW, -1, -1, TYPE_INT, 0, 0xffff, 1, 1, &tape->max_insert_speed, NULL);
+ ide_add_setting(drive, "insert_size", SETTING_READ, -1, -1, TYPE_INT, 0, 0xffff, 1, 1, &tape->insert_size, NULL);
+ }
}
/*
@@ -3570,42 +5485,48 @@
*/
static void idetape_setup (ide_drive_t *drive, idetape_tape_t *tape, int minor)
{
- ide_hwif_t *hwif = HWIF(drive);
unsigned long t1, tmid, tn, t;
- u16 speed;
+ int speed;
struct idetape_id_gcw gcw;
+ int stage_size;
memset (tape, 0, sizeof (idetape_tape_t));
spin_lock_init(&tape->spinlock);
drive->driver_data = tape;
drive->ready_stat = 0; /* An ATAPI device ignores DRDY */
+ if (strstr(drive->id->model, "OnStream DI-30"))
+ tape->onstream = 1;
+ drive->dsc_overlap = 1;
#ifdef CONFIG_BLK_DEV_IDEPCI
- /*
- * These two ide-pci host adapters appear to need this disabled.
- */
- if (HWIF(drive)->pci_dev != NULL && (
- (HWIF(drive)->pci_dev->device == PCI_DEVICE_ID_ARTOP_ATP850UF) ||
- (HWIF(drive)->pci_dev->device == PCI_DEVICE_ID_TTI_HPT343))) {
- drive->dsc_overlap = 0;
- } else
-#endif /* CONFIG_BLK_DEV_IDEPCI */
- {
- drive->dsc_overlap = 1;
+ if (!tape->onstream && 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;
+ }
}
- memset (tape, 0, sizeof (idetape_tape_t));
+#endif /* CONFIG_BLK_DEV_IDEPCI */
tape->drive = drive;
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->min_pipeline = IDETAPE_MIN_PIPELINE_STAGES;
- tape->max_pipeline = IDETAPE_MAX_PIPELINE_STAGES;
- tape->max_stages = tape->min_pipeline;
+ 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);
- idetape_get_mode_sense_results (drive);
+ tape->min_pipeline = tape->max_pipeline = tape->max_stages = 10;
+
+ idetape_get_inquiry_results(drive);
+ idetape_get_mode_sense_results(drive);
+ if (tape->onstream)
+ idetape_configure_onstream(drive);
tape->user_bs_factor = 1;
tape->stage_size = tape->capabilities.ctl * tape->tape_block_size;
@@ -3614,45 +5535,40 @@
tape->capabilities.ctl /= 2;
tape->stage_size = tape->capabilities.ctl * tape->tape_block_size;
}
- tape->pages_per_stage = tape->stage_size / PAGE_SIZE;
- if (tape->stage_size % PAGE_SIZE) {
+ stage_size = tape->stage_size;
+ if (tape->onstream)
+ stage_size = 32768 + 512;
+ tape->pages_per_stage = stage_size / PAGE_SIZE;
+ if (stage_size % PAGE_SIZE) {
tape->pages_per_stage++;
- tape->excess_bh_size = PAGE_SIZE - tape->stage_size % PAGE_SIZE;
+ tape->excess_bh_size = PAGE_SIZE - stage_size % PAGE_SIZE;
}
/*
- * Select the "best" DSC read/write polling frequency.
- * The following algorithm attempts to find a balance between
- * good latency and good system throughput. It will be nice to
- * have all this configurable in run time at some point.
+ * Select the "best" DSC read/write polling frequency
+ * and pipeline size.
*/
speed = IDE_MAX (tape->capabilities.speed, tape->capabilities.max_speed);
+
+ tape->max_stages = speed * 1000 * 10 / tape->stage_size;
+ tape->min_pipeline = tape->max_stages;
+ tape->max_pipeline = tape->max_stages * 2;
+
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) {
- if (drive->using_dma)
- t = tmid;
- else {
- if (hwif->drives[drive->select.b.unit ^ 1].present || hwif->next != hwif)
- t = (tn + tmid) / 2;
- else
- t = tn;
- }
- } else
+ if (tape->max_stages)
+ t = tn;
+ else
t = t1;
- t = IDE_MIN (t, tmid);
/*
- * Ensure that the number we got makes sense.
+ * 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 = IDE_MAX (IDE_MIN (t, IDETAPE_DSC_RW_MAX), IDETAPE_DSC_RW_MIN);
- if (tape->best_dsc_rw_frequency != t) {
- printk (KERN_NOTICE "ide-tape: Although the recommended polling period is %lu jiffies\n", t);
- printk (KERN_NOTICE "ide-tape: we will use %lu jiffies\n", tape->best_dsc_rw_frequency);
- }
- printk (KERN_INFO "ide-tape: %s <-> %s, %dKBps, %d*%dkB buffer, %dkB pipeline, %lums tDSC%s\n",
+ 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":"");
@@ -3791,6 +5707,14 @@
printk (KERN_ERR "ide-tape: %s: not supported by this version of ide-tape\n", drive->name);
continue;
}
+ if (drive->scsi) {
+ if (strstr(drive->id->model, "OnStream DI-30")) {
+ printk("ide-tape: ide-scsi emulation is not supported for %s.\n", drive->id->model);
+ } else {
+ printk("ide-tape: passing drive %s to ide-scsi emulation.\n", drive->name);
+ continue;
+ }
+ }
tape = (idetape_tape_t *) kmalloc (sizeof (idetape_tape_t), GFP_KERNEL);
if (tape == NULL) {
printk (KERN_ERR "ide-tape: %s: Can't allocate a tape structure\n", drive->name);
@@ -3828,14 +5752,8 @@
for (minor = 0; minor < MAX_HWIFS * MAX_DRIVES; minor++) {
drive = idetape_chrdevs[minor].drive;
- if (drive) {
- if (idetape_cleanup (drive))
- printk (KERN_ERR "ide-tape: %s: cleanup_module() called while still busy\n", drive->name);
- /* We must remove proc entries defined in this module.
- Otherwise we oops while accessing these entries */
- if (drive->proc)
- ide_remove_proc_entries(drive->proc, idetape_proc);
- }
+ if (drive != NULL && idetape_cleanup (drive))
+ printk (KERN_ERR "ide-tape: %s: cleanup_module() called while still busy\n", drive->name);
}
ide_unregister_module(&idetape_module);
}
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)