Author: sparky Date: Mon Jun 19 11:52:36 2006 GMT
Module: SOURCES Tag: HEAD
---- Log message:
- http://www.zen24593.zen.co.uk/hdaps/hdaps_protect.20060430.patch
---- Files affected:
SOURCES:
kernel-desktop-hdaps_protect.patch (NONE -> 1.1) (NEW)
---- Diffs:
================================================================
Index: SOURCES/kernel-desktop-hdaps_protect.patch
diff -u /dev/null SOURCES/kernel-desktop-hdaps_protect.patch:1.1
--- /dev/null Mon Jun 19 13:52:36 2006
+++ SOURCES/kernel-desktop-hdaps_protect.patch Mon Jun 19 13:52:31 2006
@@ -0,0 +1,694 @@
+diff -urN linux-2.6.16.original/block/ll_rw_blk.c
linux-2.6.16.hdaps/block/ll_rw_blk.c
+--- linux-2.6.16.original/block/ll_rw_blk.c 2006-03-20 05:53:29.000000000
+0000
++++ linux-2.6.16.hdaps/block/ll_rw_blk.c 2006-03-28 20:39:03.000000000
+0100
+@@ -39,6 +39,8 @@
+ static void drive_stat_acct(struct request *rq, int nr_sectors, int new_io);
+ static void init_request_from_bio(struct request *req, struct bio *bio);
+ static int __make_request(request_queue_t *q, struct bio *bio);
++static int blk_protect_register(request_queue_t *q);
++static void blk_protect_unregister(request_queue_t *q);
+
+ /*
+ * For the allocated request tables
+@@ -359,6 +361,18 @@
+
+ EXPORT_SYMBOL(blk_queue_issue_flush_fn);
+
++void blk_queue_issue_protect_fn(request_queue_t *q, issue_protect_fn *ipf)
++{
++ q->issue_protect_fn = ipf;
++}
++EXPORT_SYMBOL(blk_queue_issue_protect_fn);
++
++void blk_queue_issue_unprotect_fn(request_queue_t *q, issue_unprotect_fn *iuf)
++{
++ q->issue_unprotect_fn = iuf;
++}
++EXPORT_SYMBOL(blk_queue_issue_unprotect_fn);
++
+ /*
+ * Cache flushing for ordered writes handling
+ */
+@@ -3817,6 +3831,7 @@
+ return ret;
+ }
+
++ blk_protect_register(q);
+ return 0;
+ }
+
+@@ -3825,9 +3840,119 @@
+ request_queue_t *q = disk->queue;
+
+ if (q && q->request_fn) {
++ blk_protect_unregister(q);
+ elv_unregister_queue(q);
+
+ kobject_unregister(&q->kobj);
+ kobject_put(&disk->kobj);
+ }
+ }
++
++/*
++ * Restore the unplugging timer that we re-used
++ * to implement the queue freeze timeout...
++ */
++static void blk_unfreeze_work(void *data)
++{
++ request_queue_t *q = (request_queue_t *) data;
++
++ INIT_WORK(&q->unplug_work, blk_unplug_work, q);
++ q->unplug_timer.function = blk_unplug_timeout;
++
++ q->issue_unprotect_fn(q);
++}
++
++/*
++ * Called when the queue freeze timeout expires...
++ */
++static void blk_unfreeze_timeout(unsigned long data)
++{
++ request_queue_t *q = (request_queue_t *) data;
++ kblockd_schedule_work(&q->unplug_work);
++}
++
++/*
++ * The lower level driver parks and freezes the queue, and this block layer
++ * function sets up the freeze timeout timer on return. If the queue is
++ * already frozen then this is called to extend the timer...
++ */
++void blk_freeze_queue(request_queue_t *q, int seconds)
++{
++ /* set/reset the timer */
++ mod_timer(&q->unplug_timer, msecs_to_jiffies(seconds*1000) + jiffies);
++
++ /* we do this every iteration - is this sane? */
++ INIT_WORK(&q->unplug_work, blk_unfreeze_work, q);
++ q->unplug_timer.function = blk_unfreeze_timeout;
++}
++
++/*
++ * When reading the 'protect' attribute, we return boolean frozen or active
++ * todo:
++ * - maybe we should return seconds remaining instead?
++ */
++static ssize_t queue_protect_show(struct request_queue *q, char *page)
++{
++ return queue_var_show(blk_queue_stopped(q), (page));
++}
++
++/*
++ * When writing the 'protect' attribute, input is the number of seconds
++ * to freeze the queue for. We call a lower level helper function to
++ * park the heads and freeze/block the queue, then we make a block layer
++ * call to setup the thaw timeout. If input is 0, then we thaw the queue.
++ */
++static ssize_t queue_protect_store(struct request_queue *q, const char *page,
size_t count)
++{
++ unsigned long freeze = 0;
++ queue_var_store(&freeze, page, count);
++
++ if(freeze>0) {
++ /* Park and freeze */
++ if (!blk_queue_stopped(q))
++ q->issue_protect_fn(q);
++ /* set / reset the thaw timer */
++ blk_freeze_queue(q, freeze);
++ }
++ else
++ blk_unfreeze_timeout((unsigned long) q);
++
++ return count;
++}
++
++static struct queue_sysfs_entry queue_protect_entry = {
++ .attr = {.name = "protect", .mode = S_IRUGO | S_IWUSR },
++ .show = queue_protect_show,
++ .store = queue_protect_store,
++};
++
++static int blk_protect_register(request_queue_t *q)
++{
++ int error = 0;
++
++ /* check that the lower level driver has a protect handler */
++ if (!q->issue_protect_fn)
++ return 1;
++
++ /* create the attribute */
++ error = sysfs_create_file(&q->kobj, &queue_protect_entry.attr);
++ if(error){
++ printk(KERN_ERR
++ "blk_protect_register(): failed to create protect queue
attribute!\n");
++ return error;
++ }
++
++ kobject_get(&q->kobj);
++ return 0;
++}
++
++static void blk_protect_unregister(request_queue_t *q)
++{
++ /* check that the lower level driver has a protect handler */
++ if (!q->issue_protect_fn)
++ return;
++
++ /* remove the attribute */
++ sysfs_remove_file(&q->kobj,&queue_protect_entry.attr);
++ kobject_put(&q->kobj);
++}
+diff -urN linux-2.6.16.original/drivers/ide/ide-disk.c
linux-2.6.16.hdaps/drivers/ide/ide-disk.c
+--- linux-2.6.16.original/drivers/ide/ide-disk.c 2006-03-20
05:53:29.000000000 +0000
++++ linux-2.6.16.hdaps/drivers/ide/ide-disk.c 2006-04-30 13:24:35.000000000
+0100
+@@ -71,6 +71,10 @@
+ #include <asm/io.h>
+ #include <asm/div64.h>
+
++int idedisk_protect_method = 0;
++module_param_named(protect_method, idedisk_protect_method, int, 0444);
++MODULE_PARM_DESC(protect_method, "hdaps disk protection method (0=autodetect,
1=unload, 2=standby)");
++
+ struct ide_disk_obj {
+ ide_drive_t *drive;
+ ide_driver_t *driver;
+@@ -727,6 +731,154 @@
+ }
+
+ /*
++ * todo:
++ * - we freeze the queue regardless of success and rely on the
++ * ide_protect_queue function to thaw immediately if the command
++ * failed (to be consistent with the libata handler)... should
++ * we also inspect here?
++ */
++void ide_end_protect_rq(struct request *rq, int error)
++{
++ struct completion *waiting = rq->waiting;
++
++ /* spin lock already accquired */
++ if (!blk_queue_stopped(rq->q))
++ blk_stop_queue(rq->q);
++
++ complete(waiting);
++}
++
++int ide_unprotect_queue(request_queue_t *q)
++{
++ struct request rq;
++ unsigned long flags;
++ int pending = 0, rc = 0;
++ ide_drive_t *drive = q->queuedata;
++ u8 args[7], *argbuf = args;
++
++ if (!blk_queue_stopped(q))
++ return -EIO;
++
++ /* Are there any pending jobs on the queue? */
++ pending = ((q->rq.count[READ] > 0) || (q->rq.count[WRITE] > 0)) ? 1 : 0;
++
++ spin_lock_irqsave(q->queue_lock, flags);
++ blk_start_queue(q);
++ spin_unlock_irqrestore(q->queue_lock, flags);
++
++ /* The unload feature of the IDLE_IMMEDIATE command
++ temporarily disables HD power management from spinning down
++ the disk. Any other command will reenable HD pm, so, if
++ there are no pending jobs on the queue, another
++ CHECK_POWER_MODE1 command without the unload feature should do
++ just fine. */
++ if (!pending) {
++ printk(KERN_DEBUG "ide_unprotect_queue(): No pending I/O,
re-enabling power management..\n");
++ memset(args, 0, sizeof(args));
++ argbuf[0] = 0xe5; /* CHECK_POWER_MODE1 */
++ ide_init_drive_cmd(&rq);
++ rq.flags = REQ_DRIVE_TASK;
++ rq.buffer = argbuf;
++ rc = ide_do_drive_cmd(drive, &rq, ide_head_wait);
++ }
++
++ return rc;
++}
++
++int ide_protect_queue(request_queue_t *q, int unload)
++{
++ ide_drive_t *drive = q->queuedata;
++ struct request rq;
++ u8 args[7], *argbuf = args;
++ int ret = 0;
++ DECLARE_COMPLETION(wait);
++
++ memset(&rq, 0, sizeof(rq));
++ memset(args, 0, sizeof(args));
++
++ if (blk_queue_stopped(q))
++ return -EIO;
++
++ if (unload) {
++ argbuf[0] = 0xe1;
++ argbuf[1] = 0x44;
++ argbuf[3] = 0x4c;
++ argbuf[4] = 0x4e;
++ argbuf[5] = 0x55;
++ } else
++ argbuf[0] = 0xe0;
++
++ /* Issue the park command & freeze */
++ ide_init_drive_cmd(&rq);
++
++ rq.flags = REQ_DRIVE_TASK;
++ rq.buffer = argbuf;
++ rq.waiting = &wait;
++ rq.end_io = ide_end_protect_rq;
++
++ ret = ide_do_drive_cmd(drive, &rq, ide_next);
++ wait_for_completion(&wait);
++ rq.waiting = NULL;
++
++ if (ret)
++ {
++ printk(KERN_DEBUG "ide_protect_queue(): Warning: head NOT
parked!..\n");
++ ide_unprotect_queue(q);
++ return ret;
++ }
++
++ if (unload) {
++ if (args[3] == 0xc4)
++ printk(KERN_DEBUG "ide_protect_queue(): head
parked..\n");
++ else {
++ /* error parking the head */
++ printk(KERN_DEBUG "ide_protect_queue(): head NOT
parked!..\n");
++ ret = -EIO;
++ ide_unprotect_queue(q);
++ }
++ } else
++ printk(KERN_DEBUG "ide_protect_queue(): head park not
requested, used standby!..\n");
++
++ return ret;
++}
++
++int idedisk_issue_protect_fn(request_queue_t *q)
++{
++ ide_drive_t *drive = q->queuedata;
++ int unload;
++
++ /*
++ * Check capability of the device -
++ * - if "idle immediate with unload" is supported we use that, else
++ * we use "standby immediate" and live with spinning down the drive..
++ * (Word 84, bit 13 of IDENTIFY DEVICE data)
++ */
++ if (idedisk_protect_method == 1) {
++ unload = 1;
++ printk(KERN_DEBUG "idedisk_issue_protect_fn(): unload method
requested, overriding drive capability check..\n");
++ }
++ else if (idedisk_protect_method == 2) {
++ unload = 0;
++ printk(KERN_DEBUG "idedisk_issue_protect_fn(): standby method
requested, overriding drive capability check..\n");
++ }
++ else if (drive->id->cfsse & (1 << 13)) {
++ unload = 1;
++ printk(KERN_DEBUG "idedisk_issue_protect_fn(): unload support
reported by drive..\n");
++ }
++ else {
++ unload = 0;
++ printk(KERN_DEBUG "idedisk_issue_protect_fn(): unload support
NOT reported by drive!..\n");
++ }
++
++ return ide_protect_queue(q, unload);
++}
++
++int idedisk_issue_unprotect_fn(request_queue_t *q)
++{
++ return ide_unprotect_queue(q);
++}
++
++/*
+ * This is tightly woven into the driver->do_special can not touch.
+ * DON'T do it again until a total personality rewrite is committed.
+ */
+@@ -984,6 +1136,9 @@
+ drive->wcache = 1;
+
+ write_cache(drive, 1);
++
++ blk_queue_issue_protect_fn(drive->queue, idedisk_issue_protect_fn);
++ blk_queue_issue_unprotect_fn(drive->queue, idedisk_issue_unprotect_fn);
+ }
+
+ static void ide_cacheflush_p(ide_drive_t *drive)
+diff -urN linux-2.6.16.original/drivers/ide/ide-io.c
linux-2.6.16.hdaps/drivers/ide/ide-io.c
+--- linux-2.6.16.original/drivers/ide/ide-io.c 2006-03-20 05:53:29.000000000
+0000
++++ linux-2.6.16.hdaps/drivers/ide/ide-io.c 2006-03-26 15:10:44.000000000
+0100
+@@ -1180,6 +1180,17 @@
+ }
+
+ /*
++ * Don't accept a request when the queue is stopped (unless we
++ * are resuming from suspend). Prevents existing queue entries
++ * being processed after queue is stopped by the hard disk
++ * protection mechanism...
++ */
++ if (test_bit(QUEUE_FLAG_STOPPED, &drive->queue->queue_flags) &&
!blk_pm_resume_request(rq)) {
++ hwgroup->busy = 0;
++ break;
++ }
++
++ /*
+ * Sanity: don't accept a request that isn't a PM request
+ * if we are currently power managed. This is very important as
+ * blk_stop_queue() doesn't prevent the elv_next_request()
+@@ -1660,6 +1671,9 @@
+ where = ELEVATOR_INSERT_FRONT;
+ rq->flags |= REQ_PREEMPT;
+ }
++ if (action == ide_next)
++ where = ELEVATOR_INSERT_FRONT;
++
+ __elv_add_request(drive->queue, rq, where, 0);
+ ide_do_request(hwgroup, IDE_NO_IRQ);
+ spin_unlock_irqrestore(&ide_lock, flags);
+diff -urN linux-2.6.16.original/drivers/scsi/libata-core.c
linux-2.6.16.hdaps/drivers/scsi/libata-core.c
+--- linux-2.6.16.original/drivers/scsi/libata-core.c 2006-03-20
05:53:29.000000000 +0000
++++ linux-2.6.16.hdaps/drivers/scsi/libata-core.c 2006-04-30
13:25:24.000000000 +0100
+@@ -78,6 +78,10 @@
+ static unsigned int ata_unique_id = 1;
+ static struct workqueue_struct *ata_wq;
+
++int libata_protect_method = 0;
++module_param_named(protect_method, libata_protect_method, int, 0444);
++MODULE_PARM_DESC(protect_method, "hdaps disk protection method (0=autodetect,
1=unload, 2=standby)");
++
+ int atapi_enabled = 0;
+ module_param(atapi_enabled, int, 0444);
+ MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off,
1=on)");
+diff -urN linux-2.6.16.original/drivers/scsi/libata.h
linux-2.6.16.hdaps/drivers/scsi/libata.h
+--- linux-2.6.16.original/drivers/scsi/libata.h 2006-03-20
05:53:29.000000000 +0000
++++ linux-2.6.16.hdaps/drivers/scsi/libata.h 2006-04-30 13:25:33.000000000
+0100
+@@ -40,6 +40,7 @@
+ };
+
+ /* libata-core.c */
++extern int libata_protect_method;
+ extern int atapi_enabled;
+ extern int libata_fua;
+ extern struct ata_queued_cmd *ata_qc_new_init(struct ata_port *ap,
+diff -urN linux-2.6.16.original/drivers/scsi/libata-scsi.c
linux-2.6.16.hdaps/drivers/scsi/libata-scsi.c
+--- linux-2.6.16.original/drivers/scsi/libata-scsi.c 2006-03-20
05:53:29.000000000 +0000
++++ linux-2.6.16.hdaps/drivers/scsi/libata-scsi.c 2006-04-30
13:24:56.000000000 +0100
+@@ -662,6 +662,42 @@
+ }
+ }
+
++extern int scsi_protect_queue(request_queue_t *q, int unload);
++extern int scsi_unprotect_queue(request_queue_t *q);
++
++static int ata_scsi_issue_protect_fn(request_queue_t *q)
++{
++ struct scsi_device *sdev = q->queuedata;
++ struct ata_port *ap = (struct ata_port *) &sdev->host->hostdata[0];
++ struct ata_device *dev = &ap->device[sdev->id];
++ int unload;
++
++ if (libata_protect_method == 1) {
++ unload = 1;
++ printk(KERN_DEBUG "ata_scsi_issue_protect_fn(): unload method
requested, overriding drive capability check..\n");
++ }
++ else if (libata_protect_method == 2) {
++ unload = 0;
++ printk(KERN_DEBUG "ata_scsi_issue_protect_fn(): standby method
requested, overriding drive capability check..\n");
++ }
++ else if (ata_id_has_unload(dev->id)) {
++ unload = 1;
++ printk(KERN_DEBUG "ata_scsi_issue_protect_fn(): unload support
reported by drive..\n");
++ }
++ else {
++ unload = 0;
++ printk(KERN_DEBUG "ata_scsi_issue_protect_fn(): unload support
NOT reported by drive!..\n");
++ }
++
++ /* call scsi_protect_queue, requesting either unload or standby */
++ return scsi_protect_queue(q, unload);
++}
++
++static int ata_scsi_issue_unprotect_fn(request_queue_t *q)
++{
++ return scsi_unprotect_queue(q);
++}
++
+ /**
+ * ata_scsi_slave_config - Set SCSI device attributes
+ * @sdev: SCSI device to examine
+@@ -712,6 +748,8 @@
+ blk_queue_max_hw_segments(q, q->max_hw_segments - 1);
+ }
+ }
++ blk_queue_issue_protect_fn(sdev->request_queue,
ata_scsi_issue_protect_fn);
++ blk_queue_issue_unprotect_fn(sdev->request_queue,
ata_scsi_issue_unprotect_fn);
+
+ return 0; /* scsi layer doesn't check return value, sigh */
+ }
+diff -urN linux-2.6.16.original/drivers/scsi/scsi_lib.c
linux-2.6.16.hdaps/drivers/scsi/scsi_lib.c
+--- linux-2.6.16.original/drivers/scsi/scsi_lib.c 2006-03-20
05:53:29.000000000 +0000
++++ linux-2.6.16.hdaps/drivers/scsi/scsi_lib.c 2006-03-26 15:10:44.000000000
+0100
+@@ -2307,3 +2307,189 @@
+ return 1;
+ }
+ EXPORT_SYMBOL_GPL(scsi_execute_in_process_context);
++
++/*
++ * As per scsi_wait_req_end_io(), which was removed in 2.6.15
++ */
++static void scsi_protect_wait_req_end_io(struct request *req, int error)
++{
++ BUG_ON(!req->waiting);
++
++ complete(req->waiting);
++}
++
++/*
++ * As per scsi_wait_done(), except calls scsi_device_block
++ * to block the queue at command completion. Only called by
++ * scsi_protect_wait().
++ * todo:
++ * - we block the queue regardless of success and rely on the
++ * scsi_protect_queue function to unblock if the command
++ * failed... should we also inspect here?
++ */
++static void scsi_protect_wait_done(struct scsi_cmnd *cmd)
++{
++ struct request *req = cmd->request;
++ struct request_queue *q = cmd->device->request_queue;
++ struct scsi_device *sdev = cmd->device;
++ unsigned long flags;
++
++ req->rq_status = RQ_SCSI_DONE; /* Busy, but indicate request done */
++
++ spin_lock_irqsave(q->queue_lock, flags);
++ if (blk_rq_tagged(req))
++ blk_queue_end_tag(q, req);
++ spin_unlock_irqrestore(q->queue_lock, flags);
++
++ scsi_internal_device_block(sdev);
++
++ if (req->waiting)
++ complete(req->waiting);
++}
++
++/*
++ * As per scsi_wait_req(), except sets the completion function
++ * as scsi_protect_wait_done().
++ */
++void scsi_protect_wait_req(struct scsi_request *sreq, const void *cmnd, void
*buffer,
++ unsigned bufflen, int timeout, int retries)
++{
++ DECLARE_COMPLETION(wait);
++
++ sreq->sr_request->waiting = &wait;
++ sreq->sr_request->rq_status = RQ_SCSI_BUSY;
++ sreq->sr_request->end_io = scsi_protect_wait_req_end_io;
++ scsi_do_req(sreq, cmnd, buffer, bufflen, scsi_protect_wait_done,
++ timeout, retries);
++ wait_for_completion(&wait);
++ sreq->sr_request->waiting = NULL;
++ if (sreq->sr_request->rq_status != RQ_SCSI_DONE)
++ sreq->sr_result |= (DRIVER_ERROR << 24);
++
++ __scsi_release_request(sreq);
++}
++
++/*
++ * scsi_unprotect_queue()
++ * - release the queue that was previously blocked
++ */
++int scsi_unprotect_queue(request_queue_t *q){
++
++ struct scsi_device *sdev = q->queuedata;
++ int rc = 0, pending = 0;
++ u8 scsi_cmd[MAX_COMMAND_SIZE];
++ struct scsi_sense_hdr sshdr;
++
++ if (sdev->sdev_state != SDEV_BLOCK)
++ return -ENXIO;
++
++ /* Are there any pending jobs on the queue? */
++ pending = ((q->rq.count[READ] > 0) || (q->rq.count[WRITE] > 0)) ? 1 : 0;
++
++ rc = scsi_internal_device_unblock(sdev);
++ if (rc)
++ return rc;
++
++ if (!pending) {
++ printk(KERN_DEBUG "scsi_unprotect_queue(): No pending I/O,
re-enabling power management..\n");
++
++ memset(scsi_cmd, 0, sizeof(scsi_cmd));
++ scsi_cmd[0] = ATA_16;
++ scsi_cmd[1] = (3 << 1); /* Non-data */
++ /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
++ scsi_cmd[14] = 0xe5; /* CHECK_POWER_MODE1 */
++
++ /* Good values for timeout and retries? Values below
++ from scsi_ioctl_send_command() for default case... */
++ if (scsi_execute_req(sdev, scsi_cmd, DMA_NONE, NULL, 0, &sshdr,
++ (10*HZ), 5))
++ rc = -EIO;
++ }
++ return rc;
++}
++EXPORT_SYMBOL_GPL(scsi_unprotect_queue);
++
++/*
++ * scsi_protect_queue()
++ * - build and issue the park/standby command..
++ * - queue is blocked during command completion handler
++ */
++int scsi_protect_queue(request_queue_t *q, int unload)
++{
++ struct scsi_device *sdev = q->queuedata;
++ int rc = 0;
++ u8 scsi_cmd[MAX_COMMAND_SIZE];
++ u8 args[7];
++ struct scsi_request *sreq;
++ unsigned char *sb, *desc;
++
++ if (sdev->sdev_state != SDEV_RUNNING)
++ return -ENXIO;
++
++ memset(args, 0, sizeof(args));
++
++ if (unload) {
++ args[0] = 0xe1;
++ args[1] = 0x44;
++ args[3] = 0x4c;
++ args[4] = 0x4e;
++ args[5] = 0x55;
++ } else
++ args[0] = 0xe0;
++
++ memset(scsi_cmd, 0, sizeof(scsi_cmd));
++ scsi_cmd[0] = ATA_16;
++ scsi_cmd[1] = (3 << 1); /* Non-data */
++ scsi_cmd[2] = 0x20; /* no off.line, or data xfer, request cc */
++ scsi_cmd[4] = args[1];
<<Diff was trimmed, longer than 597 lines>>
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