Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / ide / ide-lib.c

diff --git a/kernel/drivers/ide/ide-lib.c b/kernel/drivers/ide/ide-lib.c
new file mode 100644 (file)
index 0000000..e1180fa
--- /dev/null
+++ b/kernel/drivers/ide/ide-lib.c
@@ -0,0 +1,171 @@
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/export.h>
+#include <linux/interrupt.h>
+#include <linux/ide.h>
+#include <linux/bitops.h>
+
+/**
+ *     ide_toggle_bounce       -       handle bounce buffering
+ *     @drive: drive to update
+ *     @on: on/off boolean
+ *
+ *     Enable or disable bounce buffering for the device. Drives move
+ *     between PIO and DMA and that changes the rules we need.
+ */
+
+void ide_toggle_bounce(ide_drive_t *drive, int on)
+{
+       u64 addr = BLK_BOUNCE_HIGH;     /* dma64_addr_t */
+
+       if (!PCI_DMA_BUS_IS_PHYS) {
+               addr = BLK_BOUNCE_ANY;
+       } else if (on && drive->media == ide_disk) {
+               struct device *dev = drive->hwif->dev;
+
+               if (dev && dev->dma_mask)
+                       addr = *dev->dma_mask;
+       }
+
+       if (drive->queue)
+               blk_queue_bounce_limit(drive->queue, addr);
+}
+
+u64 ide_get_lba_addr(struct ide_cmd *cmd, int lba48)
+{
+       struct ide_taskfile *tf = &cmd->tf;
+       u32 high, low;
+
+       low  = (tf->lbah << 16) | (tf->lbam << 8) | tf->lbal;
+       if (lba48) {
+               tf = &cmd->hob;
+               high = (tf->lbah << 16) | (tf->lbam << 8) | tf->lbal;
+       } else
+               high = tf->device & 0xf;
+
+       return ((u64)high << 24) | low;
+}
+EXPORT_SYMBOL_GPL(ide_get_lba_addr);
+
+static void ide_dump_sector(ide_drive_t *drive)
+{
+       struct ide_cmd cmd;
+       struct ide_taskfile *tf = &cmd.tf;
+       u8 lba48 = !!(drive->dev_flags & IDE_DFLAG_LBA48);
+
+       memset(&cmd, 0, sizeof(cmd));
+       if (lba48) {
+               cmd.valid.in.tf  = IDE_VALID_LBA;
+               cmd.valid.in.hob = IDE_VALID_LBA;
+               cmd.tf_flags = IDE_TFLAG_LBA48;
+       } else
+               cmd.valid.in.tf  = IDE_VALID_LBA | IDE_VALID_DEVICE;
+
+       ide_tf_readback(drive, &cmd);
+
+       if (lba48 || (tf->device & ATA_LBA))
+               printk(KERN_CONT ", LBAsect=%llu",
+                       (unsigned long long)ide_get_lba_addr(&cmd, lba48));
+       else
+               printk(KERN_CONT ", CHS=%d/%d/%d", (tf->lbah << 8) + tf->lbam,
+                       tf->device & 0xf, tf->lbal);
+}
+
+static void ide_dump_ata_error(ide_drive_t *drive, u8 err)
+{
+       printk(KERN_CONT "{ ");
+       if (err & ATA_ABORTED)
+               printk(KERN_CONT "DriveStatusError ");
+       if (err & ATA_ICRC)
+               printk(KERN_CONT "%s",
+                       (err & ATA_ABORTED) ? "BadCRC " : "BadSector ");
+       if (err & ATA_UNC)
+               printk(KERN_CONT "UncorrectableError ");
+       if (err & ATA_IDNF)
+               printk(KERN_CONT "SectorIdNotFound ");
+       if (err & ATA_TRK0NF)
+               printk(KERN_CONT "TrackZeroNotFound ");
+       if (err & ATA_AMNF)
+               printk(KERN_CONT "AddrMarkNotFound ");
+       printk(KERN_CONT "}");
+       if ((err & (ATA_BBK | ATA_ABORTED)) == ATA_BBK ||
+           (err & (ATA_UNC | ATA_IDNF | ATA_AMNF))) {
+               struct request *rq = drive->hwif->rq;
+
+               ide_dump_sector(drive);
+
+               if (rq)
+                       printk(KERN_CONT ", sector=%llu",
+                              (unsigned long long)blk_rq_pos(rq));
+       }
+       printk(KERN_CONT "\n");
+}
+
+static void ide_dump_atapi_error(ide_drive_t *drive, u8 err)
+{
+       printk(KERN_CONT "{ ");
+       if (err & ATAPI_ILI)
+               printk(KERN_CONT "IllegalLengthIndication ");
+       if (err & ATAPI_EOM)
+               printk(KERN_CONT "EndOfMedia ");
+       if (err & ATA_ABORTED)
+               printk(KERN_CONT "AbortedCommand ");
+       if (err & ATA_MCR)
+               printk(KERN_CONT "MediaChangeRequested ");
+       if (err & ATAPI_LFS)
+               printk(KERN_CONT "LastFailedSense=0x%02x ",
+                       (err & ATAPI_LFS) >> 4);
+       printk(KERN_CONT "}\n");
+}
+
+/**
+ *     ide_dump_status         -       translate ATA/ATAPI error
+ *     @drive: drive that status applies to
+ *     @msg: text message to print
+ *     @stat: status byte to decode
+ *
+ *     Error reporting, in human readable form (luxurious, but a memory hog).
+ *     Combines the drive name, message and status byte to provide a
+ *     user understandable explanation of the device error.
+ */
+
+u8 ide_dump_status(ide_drive_t *drive, const char *msg, u8 stat)
+{
+       u8 err = 0;
+
+       printk(KERN_ERR "%s: %s: status=0x%02x { ", drive->name, msg, stat);
+       if (stat & ATA_BUSY)
+               printk(KERN_CONT "Busy ");
+       else {
+               if (stat & ATA_DRDY)
+                       printk(KERN_CONT "DriveReady ");
+               if (stat & ATA_DF)
+                       printk(KERN_CONT "DeviceFault ");
+               if (stat & ATA_DSC)
+                       printk(KERN_CONT "SeekComplete ");
+               if (stat & ATA_DRQ)
+                       printk(KERN_CONT "DataRequest ");
+               if (stat & ATA_CORR)
+                       printk(KERN_CONT "CorrectedError ");
+               if (stat & ATA_SENSE)
+                       printk(KERN_CONT "Sense ");
+               if (stat & ATA_ERR)
+                       printk(KERN_CONT "Error ");
+       }
+       printk(KERN_CONT "}\n");
+       if ((stat & (ATA_BUSY | ATA_ERR)) == ATA_ERR) {
+               err = ide_read_error(drive);
+               printk(KERN_ERR "%s: %s: error=0x%02x ", drive->name, msg, err);
+               if (drive->media == ide_disk)
+                       ide_dump_ata_error(drive, err);
+               else
+                       ide_dump_atapi_error(drive, err);
+       }
+
+       printk(KERN_ERR "%s: possibly failed opcode: 0x%02x\n",
+               drive->name, drive->hwif->cmd.tf.command);
+
+       return err;
+}
+EXPORT_SYMBOL(ide_dump_status);