#include "libata.h"
-static unsigned int ata_busy_sleep (struct ata_port *ap,
- unsigned long tmout_pat,
- unsigned long tmout);
-static void ata_dev_reread_id(struct ata_port *ap, struct ata_device *dev);
-static void ata_dev_init_params(struct ata_port *ap, struct ata_device *dev);
+static unsigned int ata_dev_init_params(struct ata_port *ap,
+ struct ata_device *dev,
+ u16 heads,
+ u16 sectors);
static void ata_set_mode(struct ata_port *ap);
-static void ata_dev_set_xfermode(struct ata_port *ap, struct ata_device *dev);
-static unsigned int ata_get_mode_mask(const struct ata_port *ap, int shift);
-static int fgb(u32 bitmap);
-static int ata_choose_xfer_mode(const struct ata_port *ap,
- u8 *xfer_mode_out,
- unsigned int *xfer_shift_out);
-static void __ata_qc_complete(struct ata_queued_cmd *qc);
+static unsigned int ata_dev_set_xfermode(struct ata_port *ap,
+ struct ata_device *dev);
+static void ata_dev_xfermask(struct ata_port *ap, struct ata_device *dev);
static unsigned int ata_unique_id = 1;
static struct workqueue_struct *ata_wq;
-int atapi_enabled = 0;
+int atapi_enabled = 1;
module_param(atapi_enabled, int, 0444);
MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);
-/**
- * ata_tf_load_pio - send taskfile registers to host controller
- * @ap: Port to which output is sent
- * @tf: ATA taskfile register set
- *
- * Outputs ATA taskfile to standard ATA host controller.
- *
- * LOCKING:
- * Inherited from caller.
- */
-
-static void ata_tf_load_pio(struct ata_port *ap, const struct ata_taskfile *tf)
-{
- struct ata_ioports *ioaddr = &ap->ioaddr;
- unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR;
-
- if (tf->ctl != ap->last_ctl) {
- outb(tf->ctl, ioaddr->ctl_addr);
- ap->last_ctl = tf->ctl;
- ata_wait_idle(ap);
- }
-
- if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) {
- outb(tf->hob_feature, ioaddr->feature_addr);
- outb(tf->hob_nsect, ioaddr->nsect_addr);
- outb(tf->hob_lbal, ioaddr->lbal_addr);
- outb(tf->hob_lbam, ioaddr->lbam_addr);
- outb(tf->hob_lbah, ioaddr->lbah_addr);
- VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n",
- tf->hob_feature,
- tf->hob_nsect,
- tf->hob_lbal,
- tf->hob_lbam,
- tf->hob_lbah);
- }
-
- if (is_addr) {
- outb(tf->feature, ioaddr->feature_addr);
- outb(tf->nsect, ioaddr->nsect_addr);
- outb(tf->lbal, ioaddr->lbal_addr);
- outb(tf->lbam, ioaddr->lbam_addr);
- outb(tf->lbah, ioaddr->lbah_addr);
- VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
- tf->feature,
- tf->nsect,
- tf->lbal,
- tf->lbam,
- tf->lbah);
- }
-
- if (tf->flags & ATA_TFLAG_DEVICE) {
- outb(tf->device, ioaddr->device_addr);
- VPRINTK("device 0x%X\n", tf->device);
- }
-
- ata_wait_idle(ap);
-}
-
-/**
- * ata_tf_load_mmio - send taskfile registers to host controller
- * @ap: Port to which output is sent
- * @tf: ATA taskfile register set
- *
- * Outputs ATA taskfile to standard ATA host controller using MMIO.
- *
- * LOCKING:
- * Inherited from caller.
- */
-
-static void ata_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf)
-{
- struct ata_ioports *ioaddr = &ap->ioaddr;
- unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR;
-
- if (tf->ctl != ap->last_ctl) {
- writeb(tf->ctl, (void __iomem *) ap->ioaddr.ctl_addr);
- ap->last_ctl = tf->ctl;
- ata_wait_idle(ap);
- }
-
- if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) {
- writeb(tf->hob_feature, (void __iomem *) ioaddr->feature_addr);
- writeb(tf->hob_nsect, (void __iomem *) ioaddr->nsect_addr);
- writeb(tf->hob_lbal, (void __iomem *) ioaddr->lbal_addr);
- writeb(tf->hob_lbam, (void __iomem *) ioaddr->lbam_addr);
- writeb(tf->hob_lbah, (void __iomem *) ioaddr->lbah_addr);
- VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n",
- tf->hob_feature,
- tf->hob_nsect,
- tf->hob_lbal,
- tf->hob_lbam,
- tf->hob_lbah);
- }
-
- if (is_addr) {
- writeb(tf->feature, (void __iomem *) ioaddr->feature_addr);
- writeb(tf->nsect, (void __iomem *) ioaddr->nsect_addr);
- writeb(tf->lbal, (void __iomem *) ioaddr->lbal_addr);
- writeb(tf->lbam, (void __iomem *) ioaddr->lbam_addr);
- writeb(tf->lbah, (void __iomem *) ioaddr->lbah_addr);
- VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
- tf->feature,
- tf->nsect,
- tf->lbal,
- tf->lbam,
- tf->lbah);
- }
-
- if (tf->flags & ATA_TFLAG_DEVICE) {
- writeb(tf->device, (void __iomem *) ioaddr->device_addr);
- VPRINTK("device 0x%X\n", tf->device);
- }
-
- ata_wait_idle(ap);
-}
-
-
-/**
- * ata_tf_load - send taskfile registers to host controller
- * @ap: Port to which output is sent
- * @tf: ATA taskfile register set
- *
- * Outputs ATA taskfile to standard ATA host controller using MMIO
- * or PIO as indicated by the ATA_FLAG_MMIO flag.
- * Writes the control, feature, nsect, lbal, lbam, and lbah registers.
- * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect,
- * hob_lbal, hob_lbam, and hob_lbah.
- *
- * This function waits for idle (!BUSY and !DRQ) after writing
- * registers. If the control register has a new value, this
- * function also waits for idle after writing control and before
- * writing the remaining registers.
- *
- * May be used as the tf_load() entry in ata_port_operations.
- *
- * LOCKING:
- * Inherited from caller.
- */
-void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf)
-{
- if (ap->flags & ATA_FLAG_MMIO)
- ata_tf_load_mmio(ap, tf);
- else
- ata_tf_load_pio(ap, tf);
-}
-
-/**
- * ata_exec_command_pio - issue ATA command to host controller
- * @ap: port to which command is being issued
- * @tf: ATA taskfile register set
- *
- * Issues PIO write to ATA command register, with proper
- * synchronization with interrupt handler / other threads.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- */
-
-static void ata_exec_command_pio(struct ata_port *ap, const struct ata_taskfile *tf)
-{
- DPRINTK("ata%u: cmd 0x%X\n", ap->id, tf->command);
-
- outb(tf->command, ap->ioaddr.command_addr);
- ata_pause(ap);
-}
-
-
-/**
- * ata_exec_command_mmio - issue ATA command to host controller
- * @ap: port to which command is being issued
- * @tf: ATA taskfile register set
- *
- * Issues MMIO write to ATA command register, with proper
- * synchronization with interrupt handler / other threads.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- */
-
-static void ata_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf)
-{
- DPRINTK("ata%u: cmd 0x%X\n", ap->id, tf->command);
-
- writeb(tf->command, (void __iomem *) ap->ioaddr.command_addr);
- ata_pause(ap);
-}
-
-
-/**
- * ata_exec_command - issue ATA command to host controller
- * @ap: port to which command is being issued
- * @tf: ATA taskfile register set
- *
- * Issues PIO/MMIO write to ATA command register, with proper
- * synchronization with interrupt handler / other threads.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- */
-void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf)
-{
- if (ap->flags & ATA_FLAG_MMIO)
- ata_exec_command_mmio(ap, tf);
- else
- ata_exec_command_pio(ap, tf);
-}
-
-/**
- * ata_tf_to_host - issue ATA taskfile to host controller
- * @ap: port to which command is being issued
- * @tf: ATA taskfile register set
- *
- * Issues ATA taskfile register set to ATA host controller,
- * with proper synchronization with interrupt handler and
- * other threads.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- */
-
-static inline void ata_tf_to_host(struct ata_port *ap,
- const struct ata_taskfile *tf)
-{
- ap->ops->tf_load(ap, tf);
- ap->ops->exec_command(ap, tf);
-}
-
-/**
- * ata_tf_read_pio - input device's ATA taskfile shadow registers
- * @ap: Port from which input is read
- * @tf: ATA taskfile register set for storing input
- *
- * Reads ATA taskfile registers for currently-selected device
- * into @tf.
- *
- * LOCKING:
- * Inherited from caller.
- */
-
-static void ata_tf_read_pio(struct ata_port *ap, struct ata_taskfile *tf)
-{
- struct ata_ioports *ioaddr = &ap->ioaddr;
-
- tf->command = ata_check_status(ap);
- tf->feature = inb(ioaddr->error_addr);
- tf->nsect = inb(ioaddr->nsect_addr);
- tf->lbal = inb(ioaddr->lbal_addr);
- tf->lbam = inb(ioaddr->lbam_addr);
- tf->lbah = inb(ioaddr->lbah_addr);
- tf->device = inb(ioaddr->device_addr);
-
- if (tf->flags & ATA_TFLAG_LBA48) {
- outb(tf->ctl | ATA_HOB, ioaddr->ctl_addr);
- tf->hob_feature = inb(ioaddr->error_addr);
- tf->hob_nsect = inb(ioaddr->nsect_addr);
- tf->hob_lbal = inb(ioaddr->lbal_addr);
- tf->hob_lbam = inb(ioaddr->lbam_addr);
- tf->hob_lbah = inb(ioaddr->lbah_addr);
- }
-}
-
-/**
- * ata_tf_read_mmio - input device's ATA taskfile shadow registers
- * @ap: Port from which input is read
- * @tf: ATA taskfile register set for storing input
- *
- * Reads ATA taskfile registers for currently-selected device
- * into @tf via MMIO.
- *
- * LOCKING:
- * Inherited from caller.
- */
-
-static void ata_tf_read_mmio(struct ata_port *ap, struct ata_taskfile *tf)
-{
- struct ata_ioports *ioaddr = &ap->ioaddr;
-
- tf->command = ata_check_status(ap);
- tf->feature = readb((void __iomem *)ioaddr->error_addr);
- tf->nsect = readb((void __iomem *)ioaddr->nsect_addr);
- tf->lbal = readb((void __iomem *)ioaddr->lbal_addr);
- tf->lbam = readb((void __iomem *)ioaddr->lbam_addr);
- tf->lbah = readb((void __iomem *)ioaddr->lbah_addr);
- tf->device = readb((void __iomem *)ioaddr->device_addr);
-
- if (tf->flags & ATA_TFLAG_LBA48) {
- writeb(tf->ctl | ATA_HOB, (void __iomem *) ap->ioaddr.ctl_addr);
- tf->hob_feature = readb((void __iomem *)ioaddr->error_addr);
- tf->hob_nsect = readb((void __iomem *)ioaddr->nsect_addr);
- tf->hob_lbal = readb((void __iomem *)ioaddr->lbal_addr);
- tf->hob_lbam = readb((void __iomem *)ioaddr->lbam_addr);
- tf->hob_lbah = readb((void __iomem *)ioaddr->lbah_addr);
- }
-}
-
-
-/**
- * ata_tf_read - input device's ATA taskfile shadow registers
- * @ap: Port from which input is read
- * @tf: ATA taskfile register set for storing input
- *
- * Reads ATA taskfile registers for currently-selected device
- * into @tf.
- *
- * Reads nsect, lbal, lbam, lbah, and device. If ATA_TFLAG_LBA48
- * is set, also reads the hob registers.
- *
- * May be used as the tf_read() entry in ata_port_operations.
- *
- * LOCKING:
- * Inherited from caller.
- */
-void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
-{
- if (ap->flags & ATA_FLAG_MMIO)
- ata_tf_read_mmio(ap, tf);
- else
- ata_tf_read_pio(ap, tf);
-}
-
-/**
- * ata_check_status_pio - Read device status reg & clear interrupt
- * @ap: port where the device is
- *
- * Reads ATA taskfile status register for currently-selected device
- * and return its value. This also clears pending interrupts
- * from this device
- *
- * LOCKING:
- * Inherited from caller.
- */
-static u8 ata_check_status_pio(struct ata_port *ap)
-{
- return inb(ap->ioaddr.status_addr);
-}
-
-/**
- * ata_check_status_mmio - Read device status reg & clear interrupt
- * @ap: port where the device is
- *
- * Reads ATA taskfile status register for currently-selected device
- * via MMIO and return its value. This also clears pending interrupts
- * from this device
- *
- * LOCKING:
- * Inherited from caller.
- */
-static u8 ata_check_status_mmio(struct ata_port *ap)
-{
- return readb((void __iomem *) ap->ioaddr.status_addr);
-}
-
-
-/**
- * ata_check_status - Read device status reg & clear interrupt
- * @ap: port where the device is
- *
- * Reads ATA taskfile status register for currently-selected device
- * and return its value. This also clears pending interrupts
- * from this device
- *
- * May be used as the check_status() entry in ata_port_operations.
- *
- * LOCKING:
- * Inherited from caller.
- */
-u8 ata_check_status(struct ata_port *ap)
-{
- if (ap->flags & ATA_FLAG_MMIO)
- return ata_check_status_mmio(ap);
- return ata_check_status_pio(ap);
-}
-
-
-/**
- * ata_altstatus - Read device alternate status reg
- * @ap: port where the device is
- *
- * Reads ATA taskfile alternate status register for
- * currently-selected device and return its value.
- *
- * Note: may NOT be used as the check_altstatus() entry in
- * ata_port_operations.
- *
- * LOCKING:
- * Inherited from caller.
- */
-u8 ata_altstatus(struct ata_port *ap)
-{
- if (ap->ops->check_altstatus)
- return ap->ops->check_altstatus(ap);
-
- if (ap->flags & ATA_FLAG_MMIO)
- return readb((void __iomem *)ap->ioaddr.altstatus_addr);
- return inb(ap->ioaddr.altstatus_addr);
-}
-
/**
* ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
* ata_rwcmd_protocol - set taskfile r/w commands and protocol
* @qc: command to examine and configure
*
- * Examine the device configuration and tf->flags to calculate
+ * Examine the device configuration and tf->flags to calculate
* the proper read/write commands and protocol to use.
*
* LOCKING:
u8 cmd;
int index, fua, lba48, write;
-
+
fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
return -1;
}
-static const char * const xfer_mode_str[] = {
- "UDMA/16",
- "UDMA/25",
- "UDMA/33",
- "UDMA/44",
- "UDMA/66",
- "UDMA/100",
- "UDMA/133",
- "UDMA7",
- "MWDMA0",
- "MWDMA1",
- "MWDMA2",
- "PIO0",
- "PIO1",
- "PIO2",
- "PIO3",
- "PIO4",
-};
-
/**
- * ata_udma_string - convert UDMA bit offset to string
- * @mask: mask of bits supported; only highest bit counts.
+ * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
+ * @pio_mask: pio_mask
+ * @mwdma_mask: mwdma_mask
+ * @udma_mask: udma_mask
*
- * Determine string which represents the highest speed
- * (highest bit in @udma_mask).
+ * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
+ * unsigned int xfer_mask.
*
* LOCKING:
* None.
*
* RETURNS:
- * Constant C string representing highest speed listed in
- * @udma_mask, or the constant C string "<n/a>".
+ * Packed xfer_mask.
*/
+static unsigned int ata_pack_xfermask(unsigned int pio_mask,
+ unsigned int mwdma_mask,
+ unsigned int udma_mask)
+{
+ return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
+ ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
+ ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
+}
-static const char *ata_mode_string(unsigned int mask)
+/**
+ * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
+ * @xfer_mask: xfer_mask to unpack
+ * @pio_mask: resulting pio_mask
+ * @mwdma_mask: resulting mwdma_mask
+ * @udma_mask: resulting udma_mask
+ *
+ * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
+ * Any NULL distination masks will be ignored.
+ */
+static void ata_unpack_xfermask(unsigned int xfer_mask,
+ unsigned int *pio_mask,
+ unsigned int *mwdma_mask,
+ unsigned int *udma_mask)
{
- int i;
+ if (pio_mask)
+ *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
+ if (mwdma_mask)
+ *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
+ if (udma_mask)
+ *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
+}
- for (i = 7; i >= 0; i--)
- if (mask & (1 << i))
- goto out;
- for (i = ATA_SHIFT_MWDMA + 2; i >= ATA_SHIFT_MWDMA; i--)
- if (mask & (1 << i))
- goto out;
- for (i = ATA_SHIFT_PIO + 4; i >= ATA_SHIFT_PIO; i--)
- if (mask & (1 << i))
- goto out;
+static const struct ata_xfer_ent {
+ unsigned int shift, bits;
+ u8 base;
+} ata_xfer_tbl[] = {
+ { ATA_SHIFT_PIO, ATA_BITS_PIO, XFER_PIO_0 },
+ { ATA_SHIFT_MWDMA, ATA_BITS_MWDMA, XFER_MW_DMA_0 },
+ { ATA_SHIFT_UDMA, ATA_BITS_UDMA, XFER_UDMA_0 },
+ { -1, },
+};
- return "<n/a>";
+/**
+ * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
+ * @xfer_mask: xfer_mask of interest
+ *
+ * Return matching XFER_* value for @xfer_mask. Only the highest
+ * bit of @xfer_mask is considered.
+ *
+ * LOCKING:
+ * None.
+ *
+ * RETURNS:
+ * Matching XFER_* value, 0 if no match found.
+ */
+static u8 ata_xfer_mask2mode(unsigned int xfer_mask)
+{
+ int highbit = fls(xfer_mask) - 1;
+ const struct ata_xfer_ent *ent;
-out:
- return xfer_mode_str[i];
+ for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
+ if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
+ return ent->base + highbit - ent->shift;
+ return 0;
}
/**
- * ata_pio_devchk - PATA device presence detection
- * @ap: ATA channel to examine
- * @device: Device to examine (starting at zero)
- *
- * This technique was originally described in
- * Hale Landis's ATADRVR (www.ata-atapi.com), and
- * later found its way into the ATA/ATAPI spec.
+ * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
+ * @xfer_mode: XFER_* of interest
*
- * Write a pattern to the ATA shadow registers,
- * and if a device is present, it will respond by
- * correctly storing and echoing back the
- * ATA shadow register contents.
+ * Return matching xfer_mask for @xfer_mode.
*
* LOCKING:
- * caller.
+ * None.
+ *
+ * RETURNS:
+ * Matching xfer_mask, 0 if no match found.
*/
-
-static unsigned int ata_pio_devchk(struct ata_port *ap,
- unsigned int device)
+static unsigned int ata_xfer_mode2mask(u8 xfer_mode)
{
- struct ata_ioports *ioaddr = &ap->ioaddr;
- u8 nsect, lbal;
-
- ap->ops->dev_select(ap, device);
-
- outb(0x55, ioaddr->nsect_addr);
- outb(0xaa, ioaddr->lbal_addr);
+ const struct ata_xfer_ent *ent;
- outb(0xaa, ioaddr->nsect_addr);
- outb(0x55, ioaddr->lbal_addr);
+ for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
+ if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
+ return 1 << (ent->shift + xfer_mode - ent->base);
+ return 0;
+}
+
+/**
+ * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
+ * @xfer_mode: XFER_* of interest
+ *
+ * Return matching xfer_shift for @xfer_mode.
+ *
+ * LOCKING:
+ * None.
+ *
+ * RETURNS:
+ * Matching xfer_shift, -1 if no match found.
+ */
+static int ata_xfer_mode2shift(unsigned int xfer_mode)
+{
+ const struct ata_xfer_ent *ent;
+
+ for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
+ if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
+ return ent->shift;
+ return -1;
+}
+
+/**
+ * ata_mode_string - convert xfer_mask to string
+ * @xfer_mask: mask of bits supported; only highest bit counts.
+ *
+ * Determine string which represents the highest speed
+ * (highest bit in @modemask).
+ *
+ * LOCKING:
+ * None.
+ *
+ * RETURNS:
+ * Constant C string representing highest speed listed in
+ * @mode_mask, or the constant C string "<n/a>".
+ */
+static const char *ata_mode_string(unsigned int xfer_mask)
+{
+ static const char * const xfer_mode_str[] = {
+ "PIO0",
+ "PIO1",
+ "PIO2",
+ "PIO3",
+ "PIO4",
+ "MWDMA0",
+ "MWDMA1",
+ "MWDMA2",
+ "UDMA/16",
+ "UDMA/25",
+ "UDMA/33",
+ "UDMA/44",
+ "UDMA/66",
+ "UDMA/100",
+ "UDMA/133",
+ "UDMA7",
+ };
+ int highbit;
+
+ highbit = fls(xfer_mask) - 1;
+ if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
+ return xfer_mode_str[highbit];
+ return "<n/a>";
+}
+
+static void ata_dev_disable(struct ata_port *ap, struct ata_device *dev)
+{
+ if (ata_dev_present(dev)) {
+ printk(KERN_WARNING "ata%u: dev %u disabled\n",
+ ap->id, dev->devno);
+ dev->class++;
+ }
+}
+
+/**
+ * ata_pio_devchk - PATA device presence detection
+ * @ap: ATA channel to examine
+ * @device: Device to examine (starting at zero)
+ *
+ * This technique was originally described in
+ * Hale Landis's ATADRVR (www.ata-atapi.com), and
+ * later found its way into the ATA/ATAPI spec.
+ *
+ * Write a pattern to the ATA shadow registers,
+ * and if a device is present, it will respond by
+ * correctly storing and echoing back the
+ * ATA shadow register contents.
+ *
+ * LOCKING:
+ * caller.
+ */
+
+static unsigned int ata_pio_devchk(struct ata_port *ap,
+ unsigned int device)
+{
+ struct ata_ioports *ioaddr = &ap->ioaddr;
+ u8 nsect, lbal;
+
+ ap->ops->dev_select(ap, device);
+
+ outb(0x55, ioaddr->nsect_addr);
+ outb(0xaa, ioaddr->lbal_addr);
+
+ outb(0xaa, ioaddr->nsect_addr);
+ outb(0x55, ioaddr->lbal_addr);
outb(0x55, ioaddr->nsect_addr);
outb(0xaa, ioaddr->lbal_addr);
* ata_dev_try_classify - Parse returned ATA device signature
* @ap: ATA channel to examine
* @device: Device to examine (starting at zero)
+ * @r_err: Value of error register on completion
*
* After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
* an ATA/ATAPI-defined set of values is placed in the ATA
*
* LOCKING:
* caller.
+ *
+ * RETURNS:
+ * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
*/
-static u8 ata_dev_try_classify(struct ata_port *ap, unsigned int device)
+static unsigned int
+ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err)
{
- struct ata_device *dev = &ap->device[device];
struct ata_taskfile tf;
unsigned int class;
u8 err;
ap->ops->tf_read(ap, &tf);
err = tf.feature;
-
- dev->class = ATA_DEV_NONE;
+ if (r_err)
+ *r_err = err;
/* see if device passed diags */
if (err == 1)
else if ((device == 0) && (err == 0x81))
/* do nothing */ ;
else
- return err;
+ return ATA_DEV_NONE;
- /* determine if device if ATA or ATAPI */
+ /* determine if device is ATA or ATAPI */
class = ata_dev_classify(&tf);
+
if (class == ATA_DEV_UNKNOWN)
- return err;
+ return ATA_DEV_NONE;
if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0))
- return err;
-
- dev->class = class;
-
- return err;
+ return ATA_DEV_NONE;
+ return class;
}
/**
- * ata_dev_id_string - Convert IDENTIFY DEVICE page into string
+ * ata_id_string - Convert IDENTIFY DEVICE page into string
* @id: IDENTIFY DEVICE results we will examine
* @s: string into which data is output
* @ofs: offset into identify device page
* caller.
*/
-void ata_dev_id_string(const u16 *id, unsigned char *s,
- unsigned int ofs, unsigned int len)
+void ata_id_string(const u16 *id, unsigned char *s,
+ unsigned int ofs, unsigned int len)
{
unsigned int c;
}
}
+/**
+ * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
+ * @id: IDENTIFY DEVICE results we will examine
+ * @s: string into which data is output
+ * @ofs: offset into identify device page
+ * @len: length of string to return. must be an odd number.
+ *
+ * This function is identical to ata_id_string except that it
+ * trims trailing spaces and terminates the resulting string with
+ * null. @len must be actual maximum length (even number) + 1.
+ *
+ * LOCKING:
+ * caller.
+ */
+void ata_id_c_string(const u16 *id, unsigned char *s,
+ unsigned int ofs, unsigned int len)
+{
+ unsigned char *p;
+
+ WARN_ON(!(len & 1));
+
+ ata_id_string(id, s, ofs, len - 1);
+
+ p = s + strnlen(s, len - 1);
+ while (p > s && p[-1] == ' ')
+ p--;
+ *p = '\0';
+}
+
+static u64 ata_id_n_sectors(const u16 *id)
+{
+ if (ata_id_has_lba(id)) {
+ if (ata_id_has_lba48(id))
+ return ata_id_u64(id, 100);
+ else
+ return ata_id_u32(id, 60);
+ } else {
+ if (ata_id_current_chs_valid(id))
+ return ata_id_u32(id, 57);
+ else
+ return id[1] * id[3] * id[6];
+ }
+}
/**
* ata_noop_dev_select - Select device 0/1 on ATA bus
/**
* ata_dump_id - IDENTIFY DEVICE info debugging output
- * @dev: Device whose IDENTIFY DEVICE page we will dump
+ * @id: IDENTIFY DEVICE page to dump
*
- * Dump selected 16-bit words from a detected device's
- * IDENTIFY PAGE page.
+ * Dump selected 16-bit words from the given IDENTIFY DEVICE
+ * page.
*
* LOCKING:
* caller.
*/
-static inline void ata_dump_id(const struct ata_device *dev)
+static inline void ata_dump_id(const u16 *id)
{
DPRINTK("49==0x%04x "
"53==0x%04x "
"63==0x%04x "
"64==0x%04x "
"75==0x%04x \n",
- dev->id[49],
- dev->id[53],
- dev->id[63],
- dev->id[64],
- dev->id[75]);
+ id[49],
+ id[53],
+ id[63],
+ id[64],
+ id[75]);
DPRINTK("80==0x%04x "
"81==0x%04x "
"82==0x%04x "
"83==0x%04x "
"84==0x%04x \n",
- dev->id[80],
- dev->id[81],
- dev->id[82],
- dev->id[83],
- dev->id[84]);
+ id[80],
+ id[81],
+ id[82],
+ id[83],
+ id[84]);
DPRINTK("88==0x%04x "
"93==0x%04x\n",
- dev->id[88],
- dev->id[93]);
+ id[88],
+ id[93]);
}
-/*
- * Compute the PIO modes available for this device. This is not as
- * trivial as it seems if we must consider early devices correctly.
+/**
+ * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
+ * @id: IDENTIFY data to compute xfer mask from
+ *
+ * Compute the xfermask for this device. This is not as trivial
+ * as it seems if we must consider early devices correctly.
+ *
+ * FIXME: pre IDE drive timing (do we care ?).
+ *
+ * LOCKING:
+ * None.
*
- * FIXME: pre IDE drive timing (do we care ?).
+ * RETURNS:
+ * Computed xfermask
*/
-
-static unsigned int ata_pio_modes(const struct ata_device *adev)
+static unsigned int ata_id_xfermask(const u16 *id)
{
- u16 modes;
+ unsigned int pio_mask, mwdma_mask, udma_mask;
/* Usual case. Word 53 indicates word 64 is valid */
- if (adev->id[ATA_ID_FIELD_VALID] & (1 << 1)) {
- modes = adev->id[ATA_ID_PIO_MODES] & 0x03;
- modes <<= 3;
- modes |= 0x7;
- return modes;
+ if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
+ pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
+ pio_mask <<= 3;
+ pio_mask |= 0x7;
+ } else {
+ /* If word 64 isn't valid then Word 51 high byte holds
+ * the PIO timing number for the maximum. Turn it into
+ * a mask.
+ */
+ pio_mask = (2 << (id[ATA_ID_OLD_PIO_MODES] & 0xFF)) - 1 ;
+
+ /* But wait.. there's more. Design your standards by
+ * committee and you too can get a free iordy field to
+ * process. However its the speeds not the modes that
+ * are supported... Note drivers using the timing API
+ * will get this right anyway
+ */
}
- /* If word 64 isn't valid then Word 51 high byte holds the PIO timing
- number for the maximum. Turn it into a mask and return it */
- modes = (2 << ((adev->id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF)) - 1 ;
- return modes;
- /* But wait.. there's more. Design your standards by committee and
- you too can get a free iordy field to process. However its the
- speeds not the modes that are supported... Note drivers using the
- timing API will get this right anyway */
+ mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
+
+ udma_mask = 0;
+ if (id[ATA_ID_FIELD_VALID] & (1 << 2))
+ udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
+
+ return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
}
-struct ata_exec_internal_arg {
- unsigned int err_mask;
- struct ata_taskfile *tf;
- struct completion *waiting;
-};
+/**
+ * ata_port_queue_task - Queue port_task
+ * @ap: The ata_port to queue port_task for
+ *
+ * Schedule @fn(@data) for execution after @delay jiffies using
+ * port_task. There is one port_task per port and it's the
+ * user(low level driver)'s responsibility to make sure that only
+ * one task is active at any given time.
+ *
+ * libata core layer takes care of synchronization between
+ * port_task and EH. ata_port_queue_task() may be ignored for EH
+ * synchronization.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ */
+void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *), void *data,
+ unsigned long delay)
+{
+ int rc;
+
+ if (ap->flags & ATA_FLAG_FLUSH_PORT_TASK)
+ return;
+
+ PREPARE_WORK(&ap->port_task, fn, data);
+
+ if (!delay)
+ rc = queue_work(ata_wq, &ap->port_task);
+ else
+ rc = queue_delayed_work(ata_wq, &ap->port_task, delay);
+
+ /* rc == 0 means that another user is using port task */
+ WARN_ON(rc == 0);
+}
+
+/**
+ * ata_port_flush_task - Flush port_task
+ * @ap: The ata_port to flush port_task for
+ *
+ * After this function completes, port_task is guranteed not to
+ * be running or scheduled.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep)
+ */
+void ata_port_flush_task(struct ata_port *ap)
+{
+ unsigned long flags;
+
+ DPRINTK("ENTER\n");
+
+ spin_lock_irqsave(&ap->host_set->lock, flags);
+ ap->flags |= ATA_FLAG_FLUSH_PORT_TASK;
+ spin_unlock_irqrestore(&ap->host_set->lock, flags);
+
+ DPRINTK("flush #1\n");
+ flush_workqueue(ata_wq);
+
+ /*
+ * At this point, if a task is running, it's guaranteed to see
+ * the FLUSH flag; thus, it will never queue pio tasks again.
+ * Cancel and flush.
+ */
+ if (!cancel_delayed_work(&ap->port_task)) {
+ DPRINTK("flush #2\n");
+ flush_workqueue(ata_wq);
+ }
+
+ spin_lock_irqsave(&ap->host_set->lock, flags);
+ ap->flags &= ~ATA_FLAG_FLUSH_PORT_TASK;
+ spin_unlock_irqrestore(&ap->host_set->lock, flags);
+
+ DPRINTK("EXIT\n");
+}
-int ata_qc_complete_internal(struct ata_queued_cmd *qc)
+void ata_qc_complete_internal(struct ata_queued_cmd *qc)
{
- struct ata_exec_internal_arg *arg = qc->private_data;
- struct completion *waiting = arg->waiting;
+ struct completion *waiting = qc->private_data;
- if (!(qc->err_mask & ~AC_ERR_DEV))
- qc->ap->ops->tf_read(qc->ap, arg->tf);
- arg->err_mask = qc->err_mask;
- arg->waiting = NULL;
+ qc->ap->ops->tf_read(qc->ap, &qc->tf);
complete(waiting);
-
- return 0;
}
/**
struct ata_queued_cmd *qc;
DECLARE_COMPLETION(wait);
unsigned long flags;
- struct ata_exec_internal_arg arg;
+ unsigned int err_mask;
spin_lock_irqsave(&ap->host_set->lock, flags);
qc->nsect = buflen / ATA_SECT_SIZE;
}
- arg.waiting = &wait;
- arg.tf = tf;
- qc->private_data = &arg;
+ qc->private_data = &wait;
qc->complete_fn = ata_qc_complete_internal;
- if (ata_qc_issue(qc))
- goto issue_fail;
+ qc->err_mask = ata_qc_issue(qc);
+ if (qc->err_mask)
+ ata_qc_complete(qc);
spin_unlock_irqrestore(&ap->host_set->lock, flags);
if (!wait_for_completion_timeout(&wait, ATA_TMOUT_INTERNAL)) {
+ ata_port_flush_task(ap);
+
spin_lock_irqsave(&ap->host_set->lock, flags);
/* We're racing with irq here. If we lose, the
* before the caller cleans up, it will result in a
* spurious interrupt. We can live with that.
*/
- if (arg.waiting) {
- qc->err_mask = AC_ERR_OTHER;
+ if (qc->flags & ATA_QCFLAG_ACTIVE) {
+ qc->err_mask = AC_ERR_TIMEOUT;
ata_qc_complete(qc);
printk(KERN_WARNING "ata%u: qc timeout (cmd 0x%x)\n",
ap->id, command);
spin_unlock_irqrestore(&ap->host_set->lock, flags);
}
- return arg.err_mask;
+ *tf = qc->tf;
+ err_mask = qc->err_mask;
- issue_fail:
ata_qc_free(qc);
- spin_unlock_irqrestore(&ap->host_set->lock, flags);
- return AC_ERR_OTHER;
+
+ /* XXX - Some LLDDs (sata_mv) disable port on command failure.
+ * Until those drivers are fixed, we detect the condition
+ * here, fail the command with AC_ERR_SYSTEM and reenable the
+ * port.
+ *
+ * Note that this doesn't change any behavior as internal
+ * command failure results in disabling the device in the
+ * higher layer for LLDDs without new reset/EH callbacks.
+ *
+ * Kill the following code as soon as those drivers are fixed.
+ */
+ if (ap->flags & ATA_FLAG_PORT_DISABLED) {
+ err_mask |= AC_ERR_SYSTEM;
+ ata_port_probe(ap);
+ }
+
+ return err_mask;
}
/**
return 0;
if (speed > 2)
return 1;
-
+
/* If we have no drive specific rule, then PIO 2 is non IORDY */
if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
}
/**
- * ata_dev_identify - obtain IDENTIFY x DEVICE page
- * @ap: port on which device we wish to probe resides
- * @device: device bus address, starting at zero
- *
- * Following bus reset, we issue the IDENTIFY [PACKET] DEVICE
- * command, and read back the 512-byte device information page.
- * The device information page is fed to us via the standard
- * PIO-IN protocol, but we hand-code it here. (TODO: investigate
- * using standard PIO-IN paths)
- *
- * After reading the device information page, we use several
- * bits of information from it to initialize data structures
- * that will be used during the lifetime of the ata_device.
- * Other data from the info page is used to disqualify certain
- * older ATA devices we do not wish to support.
+ * ata_dev_read_id - Read ID data from the specified device
+ * @ap: port on which target device resides
+ * @dev: target device
+ * @p_class: pointer to class of the target device (may be changed)
+ * @post_reset: is this read ID post-reset?
+ * @p_id: read IDENTIFY page (newly allocated)
+ *
+ * Read ID data from the specified device. ATA_CMD_ID_ATA is
+ * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
+ * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
+ * for pre-ATA4 drives.
*
* LOCKING:
- * Inherited from caller. Some functions called by this function
- * obtain the host_set lock.
+ * Kernel thread context (may sleep)
+ *
+ * RETURNS:
+ * 0 on success, -errno otherwise.
*/
-
-static void ata_dev_identify(struct ata_port *ap, unsigned int device)
+static int ata_dev_read_id(struct ata_port *ap, struct ata_device *dev,
+ unsigned int *p_class, int post_reset, u16 **p_id)
{
- struct ata_device *dev = &ap->device[device];
- unsigned int major_version;
- u16 tmp;
- unsigned long xfer_modes;
- unsigned int using_edd;
+ unsigned int class = *p_class;
struct ata_taskfile tf;
- unsigned int err_mask;
+ unsigned int err_mask = 0;
+ u16 *id;
+ const char *reason;
int rc;
- if (!ata_dev_present(dev)) {
- DPRINTK("ENTER/EXIT (host %u, dev %u) -- nodev\n",
- ap->id, device);
- return;
- }
-
- if (ap->flags & (ATA_FLAG_SRST | ATA_FLAG_SATA_RESET))
- using_edd = 0;
- else
- using_edd = 1;
-
- DPRINTK("ENTER, host %u, dev %u\n", ap->id, device);
+ DPRINTK("ENTER, host %u, dev %u\n", ap->id, dev->devno);
- assert (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ATAPI ||
- dev->class == ATA_DEV_NONE);
+ ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */
- ata_dev_select(ap, device, 1, 1); /* select device 0/1 */
+ id = kmalloc(sizeof(id[0]) * ATA_ID_WORDS, GFP_KERNEL);
+ if (id == NULL) {
+ rc = -ENOMEM;
+ reason = "out of memory";
+ goto err_out;
+ }
-retry:
- ata_tf_init(ap, &tf, device);
+ retry:
+ ata_tf_init(ap, &tf, dev->devno);
- if (dev->class == ATA_DEV_ATA) {
+ switch (class) {
+ case ATA_DEV_ATA:
tf.command = ATA_CMD_ID_ATA;
- DPRINTK("do ATA identify\n");
- } else {
+ break;
+ case ATA_DEV_ATAPI:
tf.command = ATA_CMD_ID_ATAPI;
- DPRINTK("do ATAPI identify\n");
+ break;
+ default:
+ rc = -ENODEV;
+ reason = "unsupported class";
+ goto err_out;
}
tf.protocol = ATA_PROT_PIO;
err_mask = ata_exec_internal(ap, dev, &tf, DMA_FROM_DEVICE,
- dev->id, sizeof(dev->id));
-
+ id, sizeof(id[0]) * ATA_ID_WORDS);
if (err_mask) {
- if (err_mask & ~AC_ERR_DEV)
- goto err_out;
-
- /*
- * arg! EDD works for all test cases, but seems to return
- * the ATA signature for some ATAPI devices. Until the
- * reason for this is found and fixed, we fix up the mess
- * here. If IDENTIFY DEVICE returns command aborted
- * (as ATAPI devices do), then we issue an
- * IDENTIFY PACKET DEVICE.
- *
- * ATA software reset (SRST, the default) does not appear
- * to have this problem.
- */
- if ((using_edd) && (dev->class == ATA_DEV_ATA)) {
- u8 err = tf.feature;
- if (err & ATA_ABORTED) {
- dev->class = ATA_DEV_ATAPI;
- goto retry;
- }
- }
+ rc = -EIO;
+ reason = "I/O error";
goto err_out;
}
- swap_buf_le16(dev->id, ATA_ID_WORDS);
-
- /* print device capabilities */
- printk(KERN_DEBUG "ata%u: dev %u cfg "
- "49:%04x 82:%04x 83:%04x 84:%04x 85:%04x 86:%04x 87:%04x 88:%04x\n",
- ap->id, device, dev->id[49],
- dev->id[82], dev->id[83], dev->id[84],
- dev->id[85], dev->id[86], dev->id[87],
- dev->id[88]);
-
- /*
- * common ATA, ATAPI feature tests
- */
+ swap_buf_le16(id, ATA_ID_WORDS);
- /* we require DMA support (bits 8 of word 49) */
- if (!ata_id_has_dma(dev->id)) {
- printk(KERN_DEBUG "ata%u: no dma\n", ap->id);
- goto err_out_nosup;
+ /* sanity check */
+ if ((class == ATA_DEV_ATA) != (ata_id_is_ata(id) | ata_id_is_cfa(id))) {
+ rc = -EINVAL;
+ reason = "device reports illegal type";
+ goto err_out;
}
- /* quick-n-dirty find max transfer mode; for printk only */
- xfer_modes = dev->id[ATA_ID_UDMA_MODES];
- if (!xfer_modes)
- xfer_modes = (dev->id[ATA_ID_MWDMA_MODES]) << ATA_SHIFT_MWDMA;
- if (!xfer_modes)
- xfer_modes = ata_pio_modes(dev);
-
- ata_dump_id(dev);
-
- /* ATA-specific feature tests */
- if (dev->class == ATA_DEV_ATA) {
- if (!ata_id_is_ata(dev->id)) /* sanity check */
- goto err_out_nosup;
-
- /* get major version */
- tmp = dev->id[ATA_ID_MAJOR_VER];
- for (major_version = 14; major_version >= 1; major_version--)
- if (tmp & (1 << major_version))
- break;
-
+ if (post_reset && class == ATA_DEV_ATA) {
/*
* The exact sequence expected by certain pre-ATA4 drives is:
* SRST RESET
* anything else..
* Some drives were very specific about that exact sequence.
*/
- if (major_version < 4 || (!ata_id_has_lba(dev->id))) {
- ata_dev_init_params(ap, dev);
+ if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
+ err_mask = ata_dev_init_params(ap, dev, id[3], id[6]);
+ if (err_mask) {
+ rc = -EIO;
+ reason = "INIT_DEV_PARAMS failed";
+ goto err_out;
+ }
/* current CHS translation info (id[53-58]) might be
* changed. reread the identify device info.
*/
- ata_dev_reread_id(ap, dev);
+ post_reset = 0;
+ goto retry;
}
+ }
- if (ata_id_has_lba(dev->id)) {
- dev->flags |= ATA_DFLAG_LBA;
+ *p_class = class;
+ *p_id = id;
+ return 0;
+
+ err_out:
+ printk(KERN_WARNING "ata%u: dev %u failed to IDENTIFY (%s)\n",
+ ap->id, dev->devno, reason);
+ kfree(id);
+ return rc;
+}
+
+static inline u8 ata_dev_knobble(const struct ata_port *ap,
+ struct ata_device *dev)
+{
+ return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
+}
+
+/**
+ * ata_dev_configure - Configure the specified ATA/ATAPI device
+ * @ap: Port on which target device resides
+ * @dev: Target device to configure
+ * @print_info: Enable device info printout
+ *
+ * Configure @dev according to @dev->id. Generic and low-level
+ * driver specific fixups are also applied.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep)
+ *
+ * RETURNS:
+ * 0 on success, -errno otherwise
+ */
+static int ata_dev_configure(struct ata_port *ap, struct ata_device *dev,
+ int print_info)
+{
+ const u16 *id = dev->id;
+ unsigned int xfer_mask;
+ int i, rc;
- if (ata_id_has_lba48(dev->id)) {
+ if (!ata_dev_present(dev)) {
+ DPRINTK("ENTER/EXIT (host %u, dev %u) -- nodev\n",
+ ap->id, dev->devno);
+ return 0;
+ }
+
+ DPRINTK("ENTER, host %u, dev %u\n", ap->id, dev->devno);
+
+ /* print device capabilities */
+ if (print_info)
+ printk(KERN_DEBUG "ata%u: dev %u cfg 49:%04x 82:%04x 83:%04x "
+ "84:%04x 85:%04x 86:%04x 87:%04x 88:%04x\n",
+ ap->id, dev->devno, id[49], id[82], id[83],
+ id[84], id[85], id[86], id[87], id[88]);
+
+ /* initialize to-be-configured parameters */
+ dev->flags = 0;
+ dev->max_sectors = 0;
+ dev->cdb_len = 0;
+ dev->n_sectors = 0;
+ dev->cylinders = 0;
+ dev->heads = 0;
+ dev->sectors = 0;
+
+ /*
+ * common ATA, ATAPI feature tests
+ */
+
+ /* find max transfer mode; for printk only */
+ xfer_mask = ata_id_xfermask(id);
+
+ ata_dump_id(id);
+
+ /* ATA-specific feature tests */
+ if (dev->class == ATA_DEV_ATA) {
+ dev->n_sectors = ata_id_n_sectors(id);
+
+ if (ata_id_has_lba(id)) {
+ const char *lba_desc;
+
+ lba_desc = "LBA";
+ dev->flags |= ATA_DFLAG_LBA;
+ if (ata_id_has_lba48(id)) {
dev->flags |= ATA_DFLAG_LBA48;
- dev->n_sectors = ata_id_u64(dev->id, 100);
- } else {
- dev->n_sectors = ata_id_u32(dev->id, 60);
+ lba_desc = "LBA48";
}
/* print device info to dmesg */
- printk(KERN_INFO "ata%u: dev %u ATA-%d, max %s, %Lu sectors:%s\n",
- ap->id, device,
- major_version,
- ata_mode_string(xfer_modes),
- (unsigned long long)dev->n_sectors,
- dev->flags & ATA_DFLAG_LBA48 ? " LBA48" : " LBA");
- } else {
+ if (print_info)
+ printk(KERN_INFO "ata%u: dev %u ATA-%d, "
+ "max %s, %Lu sectors: %s\n",
+ ap->id, dev->devno,
+ ata_id_major_version(id),
+ ata_mode_string(xfer_mask),
+ (unsigned long long)dev->n_sectors,
+ lba_desc);
+ } else {
/* CHS */
/* Default translation */
- dev->cylinders = dev->id[1];
- dev->heads = dev->id[3];
- dev->sectors = dev->id[6];
- dev->n_sectors = dev->cylinders * dev->heads * dev->sectors;
+ dev->cylinders = id[1];
+ dev->heads = id[3];
+ dev->sectors = id[6];
- if (ata_id_current_chs_valid(dev->id)) {
+ if (ata_id_current_chs_valid(id)) {
/* Current CHS translation is valid. */
- dev->cylinders = dev->id[54];
- dev->heads = dev->id[55];
- dev->sectors = dev->id[56];
-
- dev->n_sectors = ata_id_u32(dev->id, 57);
+ dev->cylinders = id[54];
+ dev->heads = id[55];
+ dev->sectors = id[56];
}
/* print device info to dmesg */
- printk(KERN_INFO "ata%u: dev %u ATA-%d, max %s, %Lu sectors: CHS %d/%d/%d\n",
- ap->id, device,
- major_version,
- ata_mode_string(xfer_modes),
- (unsigned long long)dev->n_sectors,
- (int)dev->cylinders, (int)dev->heads, (int)dev->sectors);
-
+ if (print_info)
+ printk(KERN_INFO "ata%u: dev %u ATA-%d, "
+ "max %s, %Lu sectors: CHS %u/%u/%u\n",
+ ap->id, dev->devno,
+ ata_id_major_version(id),
+ ata_mode_string(xfer_mask),
+ (unsigned long long)dev->n_sectors,
+ dev->cylinders, dev->heads, dev->sectors);
}
- ap->host->max_cmd_len = 16;
+ dev->cdb_len = 16;
}
/* ATAPI-specific feature tests */
else if (dev->class == ATA_DEV_ATAPI) {
- if (ata_id_is_ata(dev->id)) /* sanity check */
- goto err_out_nosup;
-
- rc = atapi_cdb_len(dev->id);
+ rc = atapi_cdb_len(id);
if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
printk(KERN_WARNING "ata%u: unsupported CDB len\n", ap->id);
+ rc = -EINVAL;
goto err_out_nosup;
}
- ap->cdb_len = (unsigned int) rc;
- ap->host->max_cmd_len = (unsigned char) ap->cdb_len;
+ dev->cdb_len = (unsigned int) rc;
/* print device info to dmesg */
- printk(KERN_INFO "ata%u: dev %u ATAPI, max %s\n",
- ap->id, device,
- ata_mode_string(xfer_modes));
+ if (print_info)
+ printk(KERN_INFO "ata%u: dev %u ATAPI, max %s\n",
+ ap->id, dev->devno, ata_mode_string(xfer_mask));
+ }
+
+ ap->host->max_cmd_len = 0;
+ for (i = 0; i < ATA_MAX_DEVICES; i++)
+ ap->host->max_cmd_len = max_t(unsigned int,
+ ap->host->max_cmd_len,
+ ap->device[i].cdb_len);
+
+ /* limit bridge transfers to udma5, 200 sectors */
+ if (ata_dev_knobble(ap, dev)) {
+ if (print_info)
+ printk(KERN_INFO "ata%u(%u): applying bridge limits\n",
+ ap->id, dev->devno);
+ dev->udma_mask &= ATA_UDMA5;
+ dev->max_sectors = ATA_MAX_SECTORS;
}
+ if (ap->ops->dev_config)
+ ap->ops->dev_config(ap, dev);
+
DPRINTK("EXIT, drv_stat = 0x%x\n", ata_chk_status(ap));
- return;
+ return 0;
err_out_nosup:
- printk(KERN_WARNING "ata%u: dev %u not supported, ignoring\n",
- ap->id, device);
-err_out:
- dev->class++; /* converts ATA_DEV_xxx into ATA_DEV_xxx_UNSUP */
DPRINTK("EXIT, err\n");
-}
-
-
-static inline u8 ata_dev_knobble(const struct ata_port *ap)
-{
- return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(ap->device->id)));
-}
-
-/**
- * ata_dev_config - Run device specific handlers and check for
- * SATA->PATA bridges
- * @ap: Bus
- * @i: Device
- *
- * LOCKING:
- */
-
-void ata_dev_config(struct ata_port *ap, unsigned int i)
-{
- /* limit bridge transfers to udma5, 200 sectors */
- if (ata_dev_knobble(ap)) {
- printk(KERN_INFO "ata%u(%u): applying bridge limits\n",
- ap->id, ap->device->devno);
- ap->udma_mask &= ATA_UDMA5;
- ap->host->max_sectors = ATA_MAX_SECTORS;
- ap->host->hostt->max_sectors = ATA_MAX_SECTORS;
- ap->device[i].flags |= ATA_DFLAG_LOCK_SECTORS;
- }
-
- if (ap->ops->dev_config)
- ap->ops->dev_config(ap, &ap->device[i]);
+ return rc;
}
/**
static int ata_bus_probe(struct ata_port *ap)
{
- unsigned int i, found = 0;
+ unsigned int classes[ATA_MAX_DEVICES];
+ unsigned int i, rc, found = 0;
- ap->ops->phy_reset(ap);
- if (ap->flags & ATA_FLAG_PORT_DISABLED)
- goto err_out;
+ ata_port_probe(ap);
+
+ /* reset and determine device classes */
+ for (i = 0; i < ATA_MAX_DEVICES; i++)
+ classes[i] = ATA_DEV_UNKNOWN;
+
+ if (ap->ops->probe_reset) {
+ rc = ap->ops->probe_reset(ap, classes);
+ if (rc) {
+ printk("ata%u: reset failed (errno=%d)\n", ap->id, rc);
+ return rc;
+ }
+ } else {
+ ap->ops->phy_reset(ap);
+
+ if (!(ap->flags & ATA_FLAG_PORT_DISABLED))
+ for (i = 0; i < ATA_MAX_DEVICES; i++)
+ classes[i] = ap->device[i].class;
+
+ ata_port_probe(ap);
+ }
+ for (i = 0; i < ATA_MAX_DEVICES; i++)
+ if (classes[i] == ATA_DEV_UNKNOWN)
+ classes[i] = ATA_DEV_NONE;
+
+ /* read IDENTIFY page and configure devices */
for (i = 0; i < ATA_MAX_DEVICES; i++) {
- ata_dev_identify(ap, i);
- if (ata_dev_present(&ap->device[i])) {
- found = 1;
- ata_dev_config(ap,i);
+ struct ata_device *dev = &ap->device[i];
+
+ dev->class = classes[i];
+
+ if (!ata_dev_present(dev))
+ continue;
+
+ WARN_ON(dev->id != NULL);
+ if (ata_dev_read_id(ap, dev, &dev->class, 1, &dev->id)) {
+ dev->class = ATA_DEV_NONE;
+ continue;
+ }
+
+ if (ata_dev_configure(ap, dev, 1)) {
+ ata_dev_disable(ap, dev);
+ continue;
}
+
+ found = 1;
}
- if ((!found) || (ap->flags & ATA_FLAG_PORT_DISABLED))
+ if (!found)
goto err_out_disable;
- ata_set_mode(ap);
+ if (ap->ops->set_mode)
+ ap->ops->set_mode(ap);
+ else
+ ata_set_mode(ap);
+
if (ap->flags & ATA_FLAG_PORT_DISABLED)
goto err_out_disable;
err_out_disable:
ap->ops->port_disable(ap);
-err_out:
return -1;
}
ap->flags &= ~ATA_FLAG_PORT_DISABLED;
}
+/**
+ * sata_print_link_status - Print SATA link status
+ * @ap: SATA port to printk link status about
+ *
+ * This function prints link speed and status of a SATA link.
+ *
+ * LOCKING:
+ * None.
+ */
+static void sata_print_link_status(struct ata_port *ap)
+{
+ u32 sstatus, tmp;
+ const char *speed;
+
+ if (!ap->ops->scr_read)
+ return;
+
+ sstatus = scr_read(ap, SCR_STATUS);
+
+ if (sata_dev_present(ap)) {
+ tmp = (sstatus >> 4) & 0xf;
+ if (tmp & (1 << 0))
+ speed = "1.5";
+ else if (tmp & (1 << 1))
+ speed = "3.0";
+ else
+ speed = "<unknown>";
+ printk(KERN_INFO "ata%u: SATA link up %s Gbps (SStatus %X)\n",
+ ap->id, speed, sstatus);
+ } else {
+ printk(KERN_INFO "ata%u: SATA link down (SStatus %X)\n",
+ ap->id, sstatus);
+ }
+}
+
/**
* __sata_phy_reset - Wake/reset a low-level SATA PHY
* @ap: SATA port associated with target SATA PHY.
break;
} while (time_before(jiffies, timeout));
- /* TODO: phy layer with polling, timeouts, etc. */
- sstatus = scr_read(ap, SCR_STATUS);
- if (sata_dev_present(ap)) {
- const char *speed;
- u32 tmp;
+ /* print link status */
+ sata_print_link_status(ap);
- tmp = (sstatus >> 4) & 0xf;
- if (tmp & (1 << 0))
- speed = "1.5";
- else if (tmp & (1 << 1))
- speed = "3.0";
- else
- speed = "<unknown>";
- printk(KERN_INFO "ata%u: SATA link up %s Gbps (SStatus %X)\n",
- ap->id, speed, sstatus);
+ /* TODO: phy layer with polling, timeouts, etc. */
+ if (sata_dev_present(ap))
ata_port_probe(ap);
- } else {
- printk(KERN_INFO "ata%u: SATA link down (SStatus %X)\n",
- ap->id, sstatus);
+ else
ata_port_disable(ap);
- }
if (ap->flags & ATA_FLAG_PORT_DISABLED)
return;
ata_bus_reset(ap);
}
+/**
+ * ata_dev_pair - return other device on cable
+ * @ap: port
+ * @adev: device
+ *
+ * Obtain the other device on the same cable, or if none is
+ * present NULL is returned
+ */
+
+struct ata_device *ata_dev_pair(struct ata_port *ap, struct ata_device *adev)
+{
+ struct ata_device *pair = &ap->device[1 - adev->devno];
+ if (!ata_dev_present(pair))
+ return NULL;
+ return pair;
+}
+
/**
* ata_port_disable - Disable port.
* @ap: Port to be disabled.
* PIO 0-5, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
* These were taken from ATA/ATAPI-6 standard, rev 0a, except
* for PIO 5, which is a nonstandard extension and UDMA6, which
- * is currently supported only by Maxtor drives.
+ * is currently supported only by Maxtor drives.
*/
static const struct ata_timing ata_timing[] = {
{ XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 },
/* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
-
+
{ XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 },
{ XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 },
{ XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 },
-
+
{ XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 },
{ XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 },
{ XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 },
for (t = ata_timing; t->mode != speed; t++)
if (t->mode == 0xFF)
return NULL;
- return t;
+ return t;
}
int ata_timing_compute(struct ata_device *adev, unsigned short speed,
struct ata_timing p;
/*
- * Find the mode.
+ * Find the mode.
*/
if (!(s = ata_timing_find_mode(speed)))
ata_timing_quantize(t, t, T, UT);
/*
- * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, S.M.A.R.T
- * and some other commands. We have to ensure that the DMA cycle timing is
- * slower/equal than the fastest PIO timing.
+ * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
+ * S.M.A.R.T * and some other commands. We have to ensure that the
+ * DMA cycle timing is slower/equal than the fastest PIO timing.
*/
if (speed > XFER_PIO_4) {
}
/*
- * Lenghten active & recovery time so that cycle time is correct.
+ * Lengthen active & recovery time so that cycle time is correct.
*/
if (t->act8b + t->rec8b < t->cyc8b) {
return 0;
}
-static const struct {
- unsigned int shift;
- u8 base;
-} xfer_mode_classes[] = {
- { ATA_SHIFT_UDMA, XFER_UDMA_0 },
- { ATA_SHIFT_MWDMA, XFER_MW_DMA_0 },
- { ATA_SHIFT_PIO, XFER_PIO_0 },
-};
-
-static u8 base_from_shift(unsigned int shift)
-{
- int i;
-
- for (i = 0; i < ARRAY_SIZE(xfer_mode_classes); i++)
- if (xfer_mode_classes[i].shift == shift)
- return xfer_mode_classes[i].base;
-
- return 0xff;
-}
-
-static void ata_dev_set_mode(struct ata_port *ap, struct ata_device *dev)
+static int ata_dev_set_mode(struct ata_port *ap, struct ata_device *dev)
{
- int ofs, idx;
- u8 base;
-
- if (!ata_dev_present(dev) || (ap->flags & ATA_FLAG_PORT_DISABLED))
- return;
+ unsigned int err_mask;
+ int rc;
if (dev->xfer_shift == ATA_SHIFT_PIO)
dev->flags |= ATA_DFLAG_PIO;
- ata_dev_set_xfermode(ap, dev);
+ err_mask = ata_dev_set_xfermode(ap, dev);
+ if (err_mask) {
+ printk(KERN_ERR
+ "ata%u: failed to set xfermode (err_mask=0x%x)\n",
+ ap->id, err_mask);
+ return -EIO;
+ }
- base = base_from_shift(dev->xfer_shift);
- ofs = dev->xfer_mode - base;
- idx = ofs + dev->xfer_shift;
- WARN_ON(idx >= ARRAY_SIZE(xfer_mode_str));
+ rc = ata_dev_revalidate(ap, dev, 0);
+ if (rc) {
+ printk(KERN_ERR
+ "ata%u: failed to revalidate after set xfermode\n",
+ ap->id);
+ return rc;
+ }
- DPRINTK("idx=%d xfer_shift=%u, xfer_mode=0x%x, base=0x%x, offset=%d\n",
- idx, dev->xfer_shift, (int)dev->xfer_mode, (int)base, ofs);
+ DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
+ dev->xfer_shift, (int)dev->xfer_mode);
printk(KERN_INFO "ata%u: dev %u configured for %s\n",
- ap->id, dev->devno, xfer_mode_str[idx]);
+ ap->id, dev->devno,
+ ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)));
+ return 0;
}
static int ata_host_set_pio(struct ata_port *ap)
{
- unsigned int mask;
- int x, i;
- u8 base, xfer_mode;
-
- mask = ata_get_mode_mask(ap, ATA_SHIFT_PIO);
- x = fgb(mask);
- if (x < 0) {
- printk(KERN_WARNING "ata%u: no PIO support\n", ap->id);
- return -1;
- }
-
- base = base_from_shift(ATA_SHIFT_PIO);
- xfer_mode = base + x;
-
- DPRINTK("base 0x%x xfer_mode 0x%x mask 0x%x x %d\n",
- (int)base, (int)xfer_mode, mask, x);
+ int i;
for (i = 0; i < ATA_MAX_DEVICES; i++) {
struct ata_device *dev = &ap->device[i];
- if (ata_dev_present(dev)) {
- dev->pio_mode = xfer_mode;
- dev->xfer_mode = xfer_mode;
- dev->xfer_shift = ATA_SHIFT_PIO;
- if (ap->ops->set_piomode)
- ap->ops->set_piomode(ap, dev);
+
+ if (!ata_dev_present(dev))
+ continue;
+
+ if (!dev->pio_mode) {
+ printk(KERN_WARNING "ata%u: no PIO support for device %d.\n", ap->id, i);
+ return -1;
}
+
+ dev->xfer_mode = dev->pio_mode;
+ dev->xfer_shift = ATA_SHIFT_PIO;
+ if (ap->ops->set_piomode)
+ ap->ops->set_piomode(ap, dev);
}
return 0;
}
-static void ata_host_set_dma(struct ata_port *ap, u8 xfer_mode,
- unsigned int xfer_shift)
+static void ata_host_set_dma(struct ata_port *ap)
{
int i;
for (i = 0; i < ATA_MAX_DEVICES; i++) {
struct ata_device *dev = &ap->device[i];
- if (ata_dev_present(dev)) {
- dev->dma_mode = xfer_mode;
- dev->xfer_mode = xfer_mode;
- dev->xfer_shift = xfer_shift;
- if (ap->ops->set_dmamode)
- ap->ops->set_dmamode(ap, dev);
- }
+
+ if (!ata_dev_present(dev) || !dev->dma_mode)
+ continue;
+
+ dev->xfer_mode = dev->dma_mode;
+ dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
+ if (ap->ops->set_dmamode)
+ ap->ops->set_dmamode(ap, dev);
}
}
*
* LOCKING:
* PCI/etc. bus probe sem.
- *
*/
static void ata_set_mode(struct ata_port *ap)
{
- unsigned int xfer_shift;
- u8 xfer_mode;
- int rc;
+ int i, rc, used_dma = 0;
- /* step 1: always set host PIO timings */
- rc = ata_host_set_pio(ap);
- if (rc)
- goto err_out;
+ /* step 1: calculate xfer_mask */
+ for (i = 0; i < ATA_MAX_DEVICES; i++) {
+ struct ata_device *dev = &ap->device[i];
+ unsigned int pio_mask, dma_mask;
- /* step 2: choose the best data xfer mode */
- xfer_mode = xfer_shift = 0;
- rc = ata_choose_xfer_mode(ap, &xfer_mode, &xfer_shift);
+ if (!ata_dev_present(dev))
+ continue;
+
+ ata_dev_xfermask(ap, dev);
+
+ /* TODO: let LLDD filter dev->*_mask here */
+
+ pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
+ dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
+ dev->pio_mode = ata_xfer_mask2mode(pio_mask);
+ dev->dma_mode = ata_xfer_mask2mode(dma_mask);
+
+ if (dev->dma_mode)
+ used_dma = 1;
+ }
+
+ /* step 2: always set host PIO timings */
+ rc = ata_host_set_pio(ap);
if (rc)
goto err_out;
- /* step 3: if that xfer mode isn't PIO, set host DMA timings */
- if (xfer_shift != ATA_SHIFT_PIO)
- ata_host_set_dma(ap, xfer_mode, xfer_shift);
+ /* step 3: set host DMA timings */
+ ata_host_set_dma(ap);
/* step 4: update devices' xfer mode */
- ata_dev_set_mode(ap, &ap->device[0]);
- ata_dev_set_mode(ap, &ap->device[1]);
+ for (i = 0; i < ATA_MAX_DEVICES; i++) {
+ struct ata_device *dev = &ap->device[i];
- if (ap->flags & ATA_FLAG_PORT_DISABLED)
- return;
+ if (!ata_dev_present(dev))
+ continue;
+
+ if (ata_dev_set_mode(ap, dev))
+ goto err_out;
+ }
+ /*
+ * Record simplex status. If we selected DMA then the other
+ * host channels are not permitted to do so.
+ */
+
+ if (used_dma && (ap->host_set->flags & ATA_HOST_SIMPLEX))
+ ap->host_set->simplex_claimed = 1;
+
+ /*
+ * Chip specific finalisation
+ */
if (ap->ops->post_set_mode)
ap->ops->post_set_mode(ap);
ata_port_disable(ap);
}
+/**
+ * ata_tf_to_host - issue ATA taskfile to host controller
+ * @ap: port to which command is being issued
+ * @tf: ATA taskfile register set
+ *
+ * Issues ATA taskfile register set to ATA host controller,
+ * with proper synchronization with interrupt handler and
+ * other threads.
+ *
+ * LOCKING:
+ * spin_lock_irqsave(host_set lock)
+ */
+
+static inline void ata_tf_to_host(struct ata_port *ap,
+ const struct ata_taskfile *tf)
+{
+ ap->ops->tf_load(ap, tf);
+ ap->ops->exec_command(ap, tf);
+}
+
/**
* ata_busy_sleep - sleep until BSY clears, or timeout
* @ap: port containing status register to be polled
* or a timeout occurs.
*
* LOCKING: None.
- *
*/
-static unsigned int ata_busy_sleep (struct ata_port *ap,
- unsigned long tmout_pat,
- unsigned long tmout)
+unsigned int ata_busy_sleep (struct ata_port *ap,
+ unsigned long tmout_pat, unsigned long tmout)
{
unsigned long timer_start, timeout;
u8 status;
ap->ops->dev_select(ap, 0);
}
-/**
- * ata_bus_edd - Issue EXECUTE DEVICE DIAGNOSTIC command.
- * @ap: Port to reset and probe
- *
- * Use the EXECUTE DEVICE DIAGNOSTIC command to reset and
- * probe the bus. Not often used these days.
- *
- * LOCKING:
- * PCI/etc. bus probe sem.
- * Obtains host_set lock.
- *
- */
-
-static unsigned int ata_bus_edd(struct ata_port *ap)
-{
- struct ata_taskfile tf;
- unsigned long flags;
-
- /* set up execute-device-diag (bus reset) taskfile */
- /* also, take interrupts to a known state (disabled) */
- DPRINTK("execute-device-diag\n");
- ata_tf_init(ap, &tf, 0);
- tf.ctl |= ATA_NIEN;
- tf.command = ATA_CMD_EDD;
- tf.protocol = ATA_PROT_NODATA;
-
- /* do bus reset */
- spin_lock_irqsave(&ap->host_set->lock, flags);
- ata_tf_to_host(ap, &tf);
- spin_unlock_irqrestore(&ap->host_set->lock, flags);
-
- /* spec says at least 2ms. but who knows with those
- * crazy ATAPI devices...
- */
- msleep(150);
-
- return ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
-}
-
static unsigned int ata_bus_softreset(struct ata_port *ap,
unsigned int devmask)
{
* status is checked. Because waiting for "a while" before
* checking status is fine, post SRST, we perform this magic
* delay here as well.
+ *
+ * Old drivers/ide uses the 2mS rule and then waits for ready
*/
msleep(150);
- ata_bus_post_reset(ap, devmask);
+ /* Before we perform post reset processing we want to see if
+ * the bus shows 0xFF because the odd clown forgets the D7
+ * pulldown resistor.
+ */
+ if (ata_check_status(ap) == 0xFF)
+ return AC_ERR_OTHER;
+
+ ata_bus_post_reset(ap, devmask);
+
+ return 0;
+}
+
+/**
+ * ata_bus_reset - reset host port and associated ATA channel
+ * @ap: port to reset
+ *
+ * This is typically the first time we actually start issuing
+ * commands to the ATA channel. We wait for BSY to clear, then
+ * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
+ * result. Determine what devices, if any, are on the channel
+ * by looking at the device 0/1 error register. Look at the signature
+ * stored in each device's taskfile registers, to determine if
+ * the device is ATA or ATAPI.
+ *
+ * LOCKING:
+ * PCI/etc. bus probe sem.
+ * Obtains host_set lock.
+ *
+ * SIDE EFFECTS:
+ * Sets ATA_FLAG_PORT_DISABLED if bus reset fails.
+ */
+
+void ata_bus_reset(struct ata_port *ap)
+{
+ struct ata_ioports *ioaddr = &ap->ioaddr;
+ unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
+ u8 err;
+ unsigned int dev0, dev1 = 0, devmask = 0;
+
+ DPRINTK("ENTER, host %u, port %u\n", ap->id, ap->port_no);
+
+ /* determine if device 0/1 are present */
+ if (ap->flags & ATA_FLAG_SATA_RESET)
+ dev0 = 1;
+ else {
+ dev0 = ata_devchk(ap, 0);
+ if (slave_possible)
+ dev1 = ata_devchk(ap, 1);
+ }
+
+ if (dev0)
+ devmask |= (1 << 0);
+ if (dev1)
+ devmask |= (1 << 1);
+
+ /* select device 0 again */
+ ap->ops->dev_select(ap, 0);
+
+ /* issue bus reset */
+ if (ap->flags & ATA_FLAG_SRST)
+ if (ata_bus_softreset(ap, devmask))
+ goto err_out;
+
+ /*
+ * determine by signature whether we have ATA or ATAPI devices
+ */
+ ap->device[0].class = ata_dev_try_classify(ap, 0, &err);
+ if ((slave_possible) && (err != 0x81))
+ ap->device[1].class = ata_dev_try_classify(ap, 1, &err);
+
+ /* re-enable interrupts */
+ if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */
+ ata_irq_on(ap);
+
+ /* is double-select really necessary? */
+ if (ap->device[1].class != ATA_DEV_NONE)
+ ap->ops->dev_select(ap, 1);
+ if (ap->device[0].class != ATA_DEV_NONE)
+ ap->ops->dev_select(ap, 0);
+
+ /* if no devices were detected, disable this port */
+ if ((ap->device[0].class == ATA_DEV_NONE) &&
+ (ap->device[1].class == ATA_DEV_NONE))
+ goto err_out;
+
+ if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) {
+ /* set up device control for ATA_FLAG_SATA_RESET */
+ if (ap->flags & ATA_FLAG_MMIO)
+ writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
+ else
+ outb(ap->ctl, ioaddr->ctl_addr);
+ }
+
+ DPRINTK("EXIT\n");
+ return;
+
+err_out:
+ printk(KERN_ERR "ata%u: disabling port\n", ap->id);
+ ap->ops->port_disable(ap);
+
+ DPRINTK("EXIT\n");
+}
+
+static int sata_phy_resume(struct ata_port *ap)
+{
+ unsigned long timeout = jiffies + (HZ * 5);
+ u32 sstatus;
+
+ scr_write_flush(ap, SCR_CONTROL, 0x300);
+
+ /* Wait for phy to become ready, if necessary. */
+ do {
+ msleep(200);
+ sstatus = scr_read(ap, SCR_STATUS);
+ if ((sstatus & 0xf) != 1)
+ return 0;
+ } while (time_before(jiffies, timeout));
+
+ return -1;
+}
+
+/**
+ * ata_std_probeinit - initialize probing
+ * @ap: port to be probed
+ *
+ * @ap is about to be probed. Initialize it. This function is
+ * to be used as standard callback for ata_drive_probe_reset().
+ *
+ * NOTE!!! Do not use this function as probeinit if a low level
+ * driver implements only hardreset. Just pass NULL as probeinit
+ * in that case. Using this function is probably okay but doing
+ * so makes reset sequence different from the original
+ * ->phy_reset implementation and Jeff nervous. :-P
+ */
+void ata_std_probeinit(struct ata_port *ap)
+{
+ if ((ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read) {
+ sata_phy_resume(ap);
+ if (sata_dev_present(ap))
+ ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
+ }
+}
+
+/**
+ * ata_std_softreset - reset host port via ATA SRST
+ * @ap: port to reset
+ * @verbose: fail verbosely
+ * @classes: resulting classes of attached devices
+ *
+ * Reset host port using ATA SRST. This function is to be used
+ * as standard callback for ata_drive_*_reset() functions.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep)
+ *
+ * RETURNS:
+ * 0 on success, -errno otherwise.
+ */
+int ata_std_softreset(struct ata_port *ap, int verbose, unsigned int *classes)
+{
+ unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
+ unsigned int devmask = 0, err_mask;
+ u8 err;
+
+ DPRINTK("ENTER\n");
+
+ if (ap->ops->scr_read && !sata_dev_present(ap)) {
+ classes[0] = ATA_DEV_NONE;
+ goto out;
+ }
+
+ /* determine if device 0/1 are present */
+ if (ata_devchk(ap, 0))
+ devmask |= (1 << 0);
+ if (slave_possible && ata_devchk(ap, 1))
+ devmask |= (1 << 1);
+
+ /* select device 0 again */
+ ap->ops->dev_select(ap, 0);
+
+ /* issue bus reset */
+ DPRINTK("about to softreset, devmask=%x\n", devmask);
+ err_mask = ata_bus_softreset(ap, devmask);
+ if (err_mask) {
+ if (verbose)
+ printk(KERN_ERR "ata%u: SRST failed (err_mask=0x%x)\n",
+ ap->id, err_mask);
+ else
+ DPRINTK("EXIT, softreset failed (err_mask=0x%x)\n",
+ err_mask);
+ return -EIO;
+ }
+
+ /* determine by signature whether we have ATA or ATAPI devices */
+ classes[0] = ata_dev_try_classify(ap, 0, &err);
+ if (slave_possible && err != 0x81)
+ classes[1] = ata_dev_try_classify(ap, 1, &err);
+
+ out:
+ DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]);
+ return 0;
+}
+
+/**
+ * sata_std_hardreset - reset host port via SATA phy reset
+ * @ap: port to reset
+ * @verbose: fail verbosely
+ * @class: resulting class of attached device
+ *
+ * SATA phy-reset host port using DET bits of SControl register.
+ * This function is to be used as standard callback for
+ * ata_drive_*_reset().
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep)
+ *
+ * RETURNS:
+ * 0 on success, -errno otherwise.
+ */
+int sata_std_hardreset(struct ata_port *ap, int verbose, unsigned int *class)
+{
+ DPRINTK("ENTER\n");
+
+ /* Issue phy wake/reset */
+ scr_write_flush(ap, SCR_CONTROL, 0x301);
+
+ /*
+ * Couldn't find anything in SATA I/II specs, but AHCI-1.1
+ * 10.4.2 says at least 1 ms.
+ */
+ msleep(1);
+
+ /* Bring phy back */
+ sata_phy_resume(ap);
+
+ /* TODO: phy layer with polling, timeouts, etc. */
+ if (!sata_dev_present(ap)) {
+ *class = ATA_DEV_NONE;
+ DPRINTK("EXIT, link offline\n");
+ return 0;
+ }
+
+ if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
+ if (verbose)
+ printk(KERN_ERR "ata%u: COMRESET failed "
+ "(device not ready)\n", ap->id);
+ else
+ DPRINTK("EXIT, device not ready\n");
+ return -EIO;
+ }
+
+ ap->ops->dev_select(ap, 0); /* probably unnecessary */
+
+ *class = ata_dev_try_classify(ap, 0, NULL);
+
+ DPRINTK("EXIT, class=%u\n", *class);
+ return 0;
+}
+
+/**
+ * ata_std_postreset - standard postreset callback
+ * @ap: the target ata_port
+ * @classes: classes of attached devices
+ *
+ * This function is invoked after a successful reset. Note that
+ * the device might have been reset more than once using
+ * different reset methods before postreset is invoked.
+ *
+ * This function is to be used as standard callback for
+ * ata_drive_*_reset().
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep)
+ */
+void ata_std_postreset(struct ata_port *ap, unsigned int *classes)
+{
+ DPRINTK("ENTER\n");
+
+ /* set cable type if it isn't already set */
+ if (ap->cbl == ATA_CBL_NONE && ap->flags & ATA_FLAG_SATA)
+ ap->cbl = ATA_CBL_SATA;
+
+ /* print link status */
+ if (ap->cbl == ATA_CBL_SATA)
+ sata_print_link_status(ap);
+
+ /* re-enable interrupts */
+ if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */
+ ata_irq_on(ap);
+
+ /* is double-select really necessary? */
+ if (classes[0] != ATA_DEV_NONE)
+ ap->ops->dev_select(ap, 1);
+ if (classes[1] != ATA_DEV_NONE)
+ ap->ops->dev_select(ap, 0);
+
+ /* bail out if no device is present */
+ if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) {
+ DPRINTK("EXIT, no device\n");
+ return;
+ }
+
+ /* set up device control */
+ if (ap->ioaddr.ctl_addr) {
+ if (ap->flags & ATA_FLAG_MMIO)
+ writeb(ap->ctl, (void __iomem *) ap->ioaddr.ctl_addr);
+ else
+ outb(ap->ctl, ap->ioaddr.ctl_addr);
+ }
+
+ DPRINTK("EXIT\n");
+}
+
+/**
+ * ata_std_probe_reset - standard probe reset method
+ * @ap: prot to perform probe-reset
+ * @classes: resulting classes of attached devices
+ *
+ * The stock off-the-shelf ->probe_reset method.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep)
+ *
+ * RETURNS:
+ * 0 on success, -errno otherwise.
+ */
+int ata_std_probe_reset(struct ata_port *ap, unsigned int *classes)
+{
+ ata_reset_fn_t hardreset;
+
+ hardreset = NULL;
+ if (ap->flags & ATA_FLAG_SATA && ap->ops->scr_read)
+ hardreset = sata_std_hardreset;
+
+ return ata_drive_probe_reset(ap, ata_std_probeinit,
+ ata_std_softreset, hardreset,
+ ata_std_postreset, classes);
+}
+
+static int do_probe_reset(struct ata_port *ap, ata_reset_fn_t reset,
+ ata_postreset_fn_t postreset,
+ unsigned int *classes)
+{
+ int i, rc;
+
+ for (i = 0; i < ATA_MAX_DEVICES; i++)
+ classes[i] = ATA_DEV_UNKNOWN;
+
+ rc = reset(ap, 0, classes);
+ if (rc)
+ return rc;
+
+ /* If any class isn't ATA_DEV_UNKNOWN, consider classification
+ * is complete and convert all ATA_DEV_UNKNOWN to
+ * ATA_DEV_NONE.
+ */
+ for (i = 0; i < ATA_MAX_DEVICES; i++)
+ if (classes[i] != ATA_DEV_UNKNOWN)
+ break;
+
+ if (i < ATA_MAX_DEVICES)
+ for (i = 0; i < ATA_MAX_DEVICES; i++)
+ if (classes[i] == ATA_DEV_UNKNOWN)
+ classes[i] = ATA_DEV_NONE;
+
+ if (postreset)
+ postreset(ap, classes);
+
+ return classes[0] != ATA_DEV_UNKNOWN ? 0 : -ENODEV;
+}
+
+/**
+ * ata_drive_probe_reset - Perform probe reset with given methods
+ * @ap: port to reset
+ * @probeinit: probeinit method (can be NULL)
+ * @softreset: softreset method (can be NULL)
+ * @hardreset: hardreset method (can be NULL)
+ * @postreset: postreset method (can be NULL)
+ * @classes: resulting classes of attached devices
+ *
+ * Reset the specified port and classify attached devices using
+ * given methods. This function prefers softreset but tries all
+ * possible reset sequences to reset and classify devices. This
+ * function is intended to be used for constructing ->probe_reset
+ * callback by low level drivers.
+ *
+ * Reset methods should follow the following rules.
+ *
+ * - Return 0 on sucess, -errno on failure.
+ * - If classification is supported, fill classes[] with
+ * recognized class codes.
+ * - If classification is not supported, leave classes[] alone.
+ * - If verbose is non-zero, print error message on failure;
+ * otherwise, shut up.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep)
+ *
+ * RETURNS:
+ * 0 on success, -EINVAL if no reset method is avaliable, -ENODEV
+ * if classification fails, and any error code from reset
+ * methods.
+ */
+int ata_drive_probe_reset(struct ata_port *ap, ata_probeinit_fn_t probeinit,
+ ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
+ ata_postreset_fn_t postreset, unsigned int *classes)
+{
+ int rc = -EINVAL;
+
+ if (probeinit)
+ probeinit(ap);
+
+ if (softreset) {
+ rc = do_probe_reset(ap, softreset, postreset, classes);
+ if (rc == 0)
+ return 0;
+ }
+
+ if (!hardreset)
+ return rc;
+
+ rc = do_probe_reset(ap, hardreset, postreset, classes);
+ if (rc == 0 || rc != -ENODEV)
+ return rc;
+
+ if (softreset)
+ rc = do_probe_reset(ap, softreset, postreset, classes);
- return 0;
+ return rc;
}
/**
- * ata_bus_reset - reset host port and associated ATA channel
- * @ap: port to reset
+ * ata_dev_same_device - Determine whether new ID matches configured device
+ * @ap: port on which the device to compare against resides
+ * @dev: device to compare against
+ * @new_class: class of the new device
+ * @new_id: IDENTIFY page of the new device
*
- * This is typically the first time we actually start issuing
- * commands to the ATA channel. We wait for BSY to clear, then
- * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
- * result. Determine what devices, if any, are on the channel
- * by looking at the device 0/1 error register. Look at the signature
- * stored in each device's taskfile registers, to determine if
- * the device is ATA or ATAPI.
+ * Compare @new_class and @new_id against @dev and determine
+ * whether @dev is the device indicated by @new_class and
+ * @new_id.
*
* LOCKING:
- * PCI/etc. bus probe sem.
- * Obtains host_set lock.
+ * None.
*
- * SIDE EFFECTS:
- * Sets ATA_FLAG_PORT_DISABLED if bus reset fails.
+ * RETURNS:
+ * 1 if @dev matches @new_class and @new_id, 0 otherwise.
*/
-
-void ata_bus_reset(struct ata_port *ap)
+static int ata_dev_same_device(struct ata_port *ap, struct ata_device *dev,
+ unsigned int new_class, const u16 *new_id)
{
- struct ata_ioports *ioaddr = &ap->ioaddr;
- unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
- u8 err;
- unsigned int dev0, dev1 = 0, rc = 0, devmask = 0;
+ const u16 *old_id = dev->id;
+ unsigned char model[2][41], serial[2][21];
+ u64 new_n_sectors;
- DPRINTK("ENTER, host %u, port %u\n", ap->id, ap->port_no);
-
- /* determine if device 0/1 are present */
- if (ap->flags & ATA_FLAG_SATA_RESET)
- dev0 = 1;
- else {
- dev0 = ata_devchk(ap, 0);
- if (slave_possible)
- dev1 = ata_devchk(ap, 1);
+ if (dev->class != new_class) {
+ printk(KERN_INFO
+ "ata%u: dev %u class mismatch %d != %d\n",
+ ap->id, dev->devno, dev->class, new_class);
+ return 0;
}
- if (dev0)
- devmask |= (1 << 0);
- if (dev1)
- devmask |= (1 << 1);
+ ata_id_c_string(old_id, model[0], ATA_ID_PROD_OFS, sizeof(model[0]));
+ ata_id_c_string(new_id, model[1], ATA_ID_PROD_OFS, sizeof(model[1]));
+ ata_id_c_string(old_id, serial[0], ATA_ID_SERNO_OFS, sizeof(serial[0]));
+ ata_id_c_string(new_id, serial[1], ATA_ID_SERNO_OFS, sizeof(serial[1]));
+ new_n_sectors = ata_id_n_sectors(new_id);
- /* select device 0 again */
- ap->ops->dev_select(ap, 0);
+ if (strcmp(model[0], model[1])) {
+ printk(KERN_INFO
+ "ata%u: dev %u model number mismatch '%s' != '%s'\n",
+ ap->id, dev->devno, model[0], model[1]);
+ return 0;
+ }
- /* issue bus reset */
- if (ap->flags & ATA_FLAG_SRST)
- rc = ata_bus_softreset(ap, devmask);
- else if ((ap->flags & ATA_FLAG_SATA_RESET) == 0) {
- /* set up device control */
- if (ap->flags & ATA_FLAG_MMIO)
- writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
- else
- outb(ap->ctl, ioaddr->ctl_addr);
- rc = ata_bus_edd(ap);
+ if (strcmp(serial[0], serial[1])) {
+ printk(KERN_INFO
+ "ata%u: dev %u serial number mismatch '%s' != '%s'\n",
+ ap->id, dev->devno, serial[0], serial[1]);
+ return 0;
}
- if (rc)
- goto err_out;
+ if (dev->class == ATA_DEV_ATA && dev->n_sectors != new_n_sectors) {
+ printk(KERN_INFO
+ "ata%u: dev %u n_sectors mismatch %llu != %llu\n",
+ ap->id, dev->devno, (unsigned long long)dev->n_sectors,
+ (unsigned long long)new_n_sectors);
+ return 0;
+ }
- /*
- * determine by signature whether we have ATA or ATAPI devices
- */
- err = ata_dev_try_classify(ap, 0);
- if ((slave_possible) && (err != 0x81))
- ata_dev_try_classify(ap, 1);
+ return 1;
+}
- /* re-enable interrupts */
- if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */
- ata_irq_on(ap);
+/**
+ * ata_dev_revalidate - Revalidate ATA device
+ * @ap: port on which the device to revalidate resides
+ * @dev: device to revalidate
+ * @post_reset: is this revalidation after reset?
+ *
+ * Re-read IDENTIFY page and make sure @dev is still attached to
+ * the port.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep)
+ *
+ * RETURNS:
+ * 0 on success, negative errno otherwise
+ */
+int ata_dev_revalidate(struct ata_port *ap, struct ata_device *dev,
+ int post_reset)
+{
+ unsigned int class;
+ u16 *id;
+ int rc;
- /* is double-select really necessary? */
- if (ap->device[1].class != ATA_DEV_NONE)
- ap->ops->dev_select(ap, 1);
- if (ap->device[0].class != ATA_DEV_NONE)
- ap->ops->dev_select(ap, 0);
+ if (!ata_dev_present(dev))
+ return -ENODEV;
- /* if no devices were detected, disable this port */
- if ((ap->device[0].class == ATA_DEV_NONE) &&
- (ap->device[1].class == ATA_DEV_NONE))
- goto err_out;
+ class = dev->class;
+ id = NULL;
- if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) {
- /* set up device control for ATA_FLAG_SATA_RESET */
- if (ap->flags & ATA_FLAG_MMIO)
- writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
- else
- outb(ap->ctl, ioaddr->ctl_addr);
- }
+ /* allocate & read ID data */
+ rc = ata_dev_read_id(ap, dev, &class, post_reset, &id);
+ if (rc)
+ goto fail;
- DPRINTK("EXIT\n");
- return;
+ /* is the device still there? */
+ if (!ata_dev_same_device(ap, dev, class, id)) {
+ rc = -ENODEV;
+ goto fail;
+ }
-err_out:
- printk(KERN_ERR "ata%u: disabling port\n", ap->id);
- ap->ops->port_disable(ap);
+ kfree(dev->id);
+ dev->id = id;
- DPRINTK("EXIT\n");
-}
+ /* configure device according to the new ID */
+ return ata_dev_configure(ap, dev, 0);
-static void ata_pr_blacklisted(const struct ata_port *ap,
- const struct ata_device *dev)
-{
- printk(KERN_WARNING "ata%u: dev %u is on DMA blacklist, disabling DMA\n",
- ap->id, dev->devno);
+ fail:
+ printk(KERN_ERR "ata%u: dev %u revalidation failed (errno=%d)\n",
+ ap->id, dev->devno, rc);
+ kfree(id);
+ return rc;
}
static const char * const ata_dma_blacklist [] = {
- "WDC AC11000H",
- "WDC AC22100H",
- "WDC AC32500H",
- "WDC AC33100H",
- "WDC AC31600H",
- "WDC AC32100H",
- "WDC AC23200L",
- "Compaq CRD-8241B",
- "CRD-8400B",
- "CRD-8480B",
- "CRD-8482B",
- "CRD-84",
- "SanDisk SDP3B",
- "SanDisk SDP3B-64",
- "SANYO CD-ROM CRD",
- "HITACHI CDR-8",
- "HITACHI CDR-8335",
- "HITACHI CDR-8435",
- "Toshiba CD-ROM XM-6202B",
- "TOSHIBA CD-ROM XM-1702BC",
- "CD-532E-A",
- "E-IDE CD-ROM CR-840",
- "CD-ROM Drive/F5A",
- "WPI CDD-820",
- "SAMSUNG CD-ROM SC-148C",
- "SAMSUNG CD-ROM SC",
- "SanDisk SDP3B-64",
- "ATAPI CD-ROM DRIVE 40X MAXIMUM",
- "_NEC DV5800A",
+ "WDC AC11000H", NULL,
+ "WDC AC22100H", NULL,
+ "WDC AC32500H", NULL,
+ "WDC AC33100H", NULL,
+ "WDC AC31600H", NULL,
+ "WDC AC32100H", "24.09P07",
+ "WDC AC23200L", "21.10N21",
+ "Compaq CRD-8241B", NULL,
+ "CRD-8400B", NULL,
+ "CRD-8480B", NULL,
+ "CRD-8482B", NULL,
+ "CRD-84", NULL,
+ "SanDisk SDP3B", NULL,
+ "SanDisk SDP3B-64", NULL,
+ "SANYO CD-ROM CRD", NULL,
+ "HITACHI CDR-8", NULL,
+ "HITACHI CDR-8335", NULL,
+ "HITACHI CDR-8435", NULL,
+ "Toshiba CD-ROM XM-6202B", NULL,
+ "TOSHIBA CD-ROM XM-1702BC", NULL,
+ "CD-532E-A", NULL,
+ "E-IDE CD-ROM CR-840", NULL,
+ "CD-ROM Drive/F5A", NULL,
+ "WPI CDD-820", NULL,
+ "SAMSUNG CD-ROM SC-148C", NULL,
+ "SAMSUNG CD-ROM SC", NULL,
+ "SanDisk SDP3B-64", NULL,
+ "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,
+ "_NEC DV5800A", NULL,
+ "SAMSUNG CD-ROM SN-124", "N001"
};
-static int ata_dma_blacklisted(const struct ata_device *dev)
+static int ata_strim(char *s, size_t len)
{
- unsigned char model_num[40];
- char *s;
- unsigned int len;
- int i;
-
- ata_dev_id_string(dev->id, model_num, ATA_ID_PROD_OFS,
- sizeof(model_num));
- s = &model_num[0];
- len = strnlen(s, sizeof(model_num));
+ len = strnlen(s, len);
/* ATAPI specifies that empty space is blank-filled; remove blanks */
while ((len > 0) && (s[len - 1] == ' ')) {
len--;
s[len] = 0;
}
-
- for (i = 0; i < ARRAY_SIZE(ata_dma_blacklist); i++)
- if (!strncmp(ata_dma_blacklist[i], s, len))
- return 1;
-
- return 0;
+ return len;
}
-static unsigned int ata_get_mode_mask(const struct ata_port *ap, int shift)
+static int ata_dma_blacklisted(const struct ata_device *dev)
{
- const struct ata_device *master, *slave;
- unsigned int mask;
-
- master = &ap->device[0];
- slave = &ap->device[1];
-
- assert (ata_dev_present(master) || ata_dev_present(slave));
+ unsigned char model_num[40];
+ unsigned char model_rev[16];
+ unsigned int nlen, rlen;
+ int i;
- if (shift == ATA_SHIFT_UDMA) {
- mask = ap->udma_mask;
- if (ata_dev_present(master)) {
- mask &= (master->id[ATA_ID_UDMA_MODES] & 0xff);
- if (ata_dma_blacklisted(master)) {
- mask = 0;
- ata_pr_blacklisted(ap, master);
- }
- }
- if (ata_dev_present(slave)) {
- mask &= (slave->id[ATA_ID_UDMA_MODES] & 0xff);
- if (ata_dma_blacklisted(slave)) {
- mask = 0;
- ata_pr_blacklisted(ap, slave);
- }
- }
- }
- else if (shift == ATA_SHIFT_MWDMA) {
- mask = ap->mwdma_mask;
- if (ata_dev_present(master)) {
- mask &= (master->id[ATA_ID_MWDMA_MODES] & 0x07);
- if (ata_dma_blacklisted(master)) {
- mask = 0;
- ata_pr_blacklisted(ap, master);
- }
- }
- if (ata_dev_present(slave)) {
- mask &= (slave->id[ATA_ID_MWDMA_MODES] & 0x07);
- if (ata_dma_blacklisted(slave)) {
- mask = 0;
- ata_pr_blacklisted(ap, slave);
- }
- }
- }
- else if (shift == ATA_SHIFT_PIO) {
- mask = ap->pio_mask;
- if (ata_dev_present(master)) {
- /* spec doesn't return explicit support for
- * PIO0-2, so we fake it
- */
- u16 tmp_mode = master->id[ATA_ID_PIO_MODES] & 0x03;
- tmp_mode <<= 3;
- tmp_mode |= 0x7;
- mask &= tmp_mode;
- }
- if (ata_dev_present(slave)) {
- /* spec doesn't return explicit support for
- * PIO0-2, so we fake it
- */
- u16 tmp_mode = slave->id[ATA_ID_PIO_MODES] & 0x03;
- tmp_mode <<= 3;
- tmp_mode |= 0x7;
- mask &= tmp_mode;
+ ata_id_string(dev->id, model_num, ATA_ID_PROD_OFS,
+ sizeof(model_num));
+ ata_id_string(dev->id, model_rev, ATA_ID_FW_REV_OFS,
+ sizeof(model_rev));
+ nlen = ata_strim(model_num, sizeof(model_num));
+ rlen = ata_strim(model_rev, sizeof(model_rev));
+
+ for (i = 0; i < ARRAY_SIZE(ata_dma_blacklist); i += 2) {
+ if (!strncmp(ata_dma_blacklist[i], model_num, nlen)) {
+ if (ata_dma_blacklist[i+1] == NULL)
+ return 1;
+ if (!strncmp(ata_dma_blacklist[i], model_rev, rlen))
+ return 1;
}
}
- else {
- mask = 0xffffffff; /* shut up compiler warning */
- BUG();
- }
-
- return mask;
-}
-
-/* find greatest bit */
-static int fgb(u32 bitmap)
-{
- unsigned int i;
- int x = -1;
-
- for (i = 0; i < 32; i++)
- if (bitmap & (1 << i))
- x = i;
-
- return x;
+ return 0;
}
/**
- * ata_choose_xfer_mode - attempt to find best transfer mode
- * @ap: Port for which an xfer mode will be selected
- * @xfer_mode_out: (output) SET FEATURES - XFER MODE code
- * @xfer_shift_out: (output) bit shift that selects this mode
+ * ata_dev_xfermask - Compute supported xfermask of the given device
+ * @ap: Port on which the device to compute xfermask for resides
+ * @dev: Device to compute xfermask for
*
- * Based on host and device capabilities, determine the
- * maximum transfer mode that is amenable to all.
+ * Compute supported xfermask of @dev and store it in
+ * dev->*_mask. This function is responsible for applying all
+ * known limits including host controller limits, device
+ * blacklist, etc...
*
- * LOCKING:
- * PCI/etc. bus probe sem.
+ * FIXME: The current implementation limits all transfer modes to
+ * the fastest of the lowested device on the port. This is not
+ * required on most controllers.
*
- * RETURNS:
- * Zero on success, negative on error.
+ * LOCKING:
+ * None.
*/
-
-static int ata_choose_xfer_mode(const struct ata_port *ap,
- u8 *xfer_mode_out,
- unsigned int *xfer_shift_out)
+static void ata_dev_xfermask(struct ata_port *ap, struct ata_device *dev)
{
- unsigned int mask, shift;
- int x, i;
+ struct ata_host_set *hs = ap->host_set;
+ unsigned long xfer_mask;
+ int i;
- for (i = 0; i < ARRAY_SIZE(xfer_mode_classes); i++) {
- shift = xfer_mode_classes[i].shift;
- mask = ata_get_mode_mask(ap, shift);
+ xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
+ ap->udma_mask);
- x = fgb(mask);
- if (x >= 0) {
- *xfer_mode_out = xfer_mode_classes[i].base + x;
- *xfer_shift_out = shift;
- return 0;
- }
+ /* FIXME: Use port-wide xfermask for now */
+ for (i = 0; i < ATA_MAX_DEVICES; i++) {
+ struct ata_device *d = &ap->device[i];
+ if (!ata_dev_present(d))
+ continue;
+ xfer_mask &= ata_pack_xfermask(d->pio_mask, d->mwdma_mask,
+ d->udma_mask);
+ xfer_mask &= ata_id_xfermask(d->id);
+ if (ata_dma_blacklisted(d))
+ xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
+ /* Apply cable rule here. Don't apply it early because when
+ we handle hot plug the cable type can itself change */
+ if (ap->cbl == ATA_CBL_PATA40)
+ xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
}
- return -1;
+ if (ata_dma_blacklisted(dev))
+ printk(KERN_WARNING "ata%u: dev %u is on DMA blacklist, "
+ "disabling DMA\n", ap->id, dev->devno);
+
+ if (hs->flags & ATA_HOST_SIMPLEX) {
+ if (hs->simplex_claimed)
+ xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
+ }
+ if (ap->ops->mode_filter)
+ xfer_mask = ap->ops->mode_filter(ap, dev, xfer_mask);
+
+ ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
+ &dev->udma_mask);
}
/**
*
* LOCKING:
* PCI/etc. bus probe sem.
+ *
+ * RETURNS:
+ * 0 on success, AC_ERR_* mask otherwise.
*/
-static void ata_dev_set_xfermode(struct ata_port *ap, struct ata_device *dev)
+static unsigned int ata_dev_set_xfermode(struct ata_port *ap,
+ struct ata_device *dev)
{
struct ata_taskfile tf;
+ unsigned int err_mask;
/* set up set-features taskfile */
DPRINTK("set features - xfer mode\n");
tf.protocol = ATA_PROT_NODATA;
tf.nsect = dev->xfer_mode;
- if (ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0)) {
- printk(KERN_ERR "ata%u: failed to set xfermode, disabled\n",
- ap->id);
- ata_port_disable(ap);
- }
-
- DPRINTK("EXIT\n");
-}
-
-/**
- * ata_dev_reread_id - Reread the device identify device info
- * @ap: port where the device is
- * @dev: device to reread the identify device info
- *
- * LOCKING:
- */
-
-static void ata_dev_reread_id(struct ata_port *ap, struct ata_device *dev)
-{
- struct ata_taskfile tf;
-
- ata_tf_init(ap, &tf, dev->devno);
+ err_mask = ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0);
- if (dev->class == ATA_DEV_ATA) {
- tf.command = ATA_CMD_ID_ATA;
- DPRINTK("do ATA identify\n");
- } else {
- tf.command = ATA_CMD_ID_ATAPI;
- DPRINTK("do ATAPI identify\n");
- }
-
- tf.flags |= ATA_TFLAG_DEVICE;
- tf.protocol = ATA_PROT_PIO;
-
- if (ata_exec_internal(ap, dev, &tf, DMA_FROM_DEVICE,
- dev->id, sizeof(dev->id)))
- goto err_out;
-
- swap_buf_le16(dev->id, ATA_ID_WORDS);
-
- ata_dump_id(dev);
-
- DPRINTK("EXIT\n");
-
- return;
-err_out:
- printk(KERN_ERR "ata%u: failed to reread ID, disabled\n", ap->id);
- ata_port_disable(ap);
+ DPRINTK("EXIT, err_mask=%x\n", err_mask);
+ return err_mask;
}
/**
* @dev: Device to which command will be sent
*
* LOCKING:
+ * Kernel thread context (may sleep)
+ *
+ * RETURNS:
+ * 0 on success, AC_ERR_* mask otherwise.
*/
-static void ata_dev_init_params(struct ata_port *ap, struct ata_device *dev)
+static unsigned int ata_dev_init_params(struct ata_port *ap,
+ struct ata_device *dev,
+ u16 heads,
+ u16 sectors)
{
struct ata_taskfile tf;
- u16 sectors = dev->id[6];
- u16 heads = dev->id[3];
+ unsigned int err_mask;
/* Number of sectors per track 1-255. Number of heads 1-16 */
if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
- return;
+ return AC_ERR_INVALID;
/* set up init dev params taskfile */
DPRINTK("init dev params \n");
tf.nsect = sectors;
tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
- if (ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0)) {
- printk(KERN_ERR "ata%u: failed to init parameters, disabled\n",
- ap->id);
- ata_port_disable(ap);
- }
+ err_mask = ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0);
- DPRINTK("EXIT\n");
+ DPRINTK("EXIT, err_mask=%x\n", err_mask);
+ return err_mask;
}
/**
int dir = qc->dma_dir;
void *pad_buf = NULL;
- assert(qc->flags & ATA_QCFLAG_DMAMAP);
- assert(sg != NULL);
+ WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP));
+ WARN_ON(sg == NULL);
if (qc->flags & ATA_QCFLAG_SINGLE)
- assert(qc->n_elem <= 1);
+ WARN_ON(qc->n_elem > 1);
VPRINTK("unmapping %u sg elements\n", qc->n_elem);
if (qc->flags & ATA_QCFLAG_SG) {
if (qc->n_elem)
- dma_unmap_sg(ap->host_set->dev, sg, qc->n_elem, dir);
+ dma_unmap_sg(ap->dev, sg, qc->n_elem, dir);
/* restore last sg */
sg[qc->orig_n_elem - 1].length += qc->pad_len;
if (pad_buf) {
}
} else {
if (qc->n_elem)
- dma_unmap_single(ap->host_set->dev,
+ dma_unmap_single(ap->dev,
sg_dma_address(&sg[0]), sg_dma_len(&sg[0]),
dir);
/* restore sg */
struct scatterlist *sg;
unsigned int idx;
- assert(qc->__sg != NULL);
- assert(qc->n_elem > 0 || qc->pad_len > 0);
+ WARN_ON(qc->__sg == NULL);
+ WARN_ON(qc->n_elem == 0 && qc->pad_len == 0);
idx = 0;
ata_for_each_sg(sg, qc) {
ata_fill_sg(qc);
}
+void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
+
/**
* ata_sg_init_one - Associate command with memory buffer
* @qc: Command to be associated
void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
struct scatterlist *psg = &qc->pad_sgent;
- assert(qc->dev->class == ATA_DEV_ATAPI);
+ WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
memset(pad_buf, 0, ATA_DMA_PAD_SZ);
goto skip_map;
}
- dma_address = dma_map_single(ap->host_set->dev, qc->buf_virt,
+ dma_address = dma_map_single(ap->dev, qc->buf_virt,
sg->length, dir);
if (dma_mapping_error(dma_address)) {
/* restore sg */
int n_elem, pre_n_elem, dir, trim_sg = 0;
VPRINTK("ENTER, ata%u\n", ap->id);
- assert(qc->flags & ATA_QCFLAG_SG);
+ WARN_ON(!(qc->flags & ATA_QCFLAG_SG));
/* we must lengthen transfers to end on a 32-bit boundary */
qc->pad_len = lsg->length & 3;
struct scatterlist *psg = &qc->pad_sgent;
unsigned int offset;
- assert(qc->dev->class == ATA_DEV_ATAPI);
+ WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
memset(pad_buf, 0, ATA_DMA_PAD_SZ);
}
dir = qc->dma_dir;
- n_elem = dma_map_sg(ap->host_set->dev, sg, pre_n_elem, dir);
+ n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir);
if (n_elem < 1) {
/* restore last sg */
lsg->length += qc->pad_len;
}
/**
- * ata_pio_poll -
+ * ata_pio_poll - poll using PIO, depending on current state
* @ap: the target ata_port
*
* LOCKING:
unsigned int reg_state = HSM_ST_UNKNOWN;
qc = ata_qc_from_tag(ap, ap->active_tag);
- assert(qc != NULL);
+ WARN_ON(qc == NULL);
switch (ap->hsm_task_state) {
case HSM_ST:
status = ata_chk_status(ap);
if (status & ATA_BUSY) {
if (time_after(jiffies, ap->pio_task_timeout)) {
- qc->err_mask |= AC_ERR_ATA_BUS;
+ qc->err_mask |= AC_ERR_TIMEOUT;
ap->hsm_task_state = HSM_ST_TMOUT;
return 0;
}
}
qc = ata_qc_from_tag(ap, ap->active_tag);
- assert(qc != NULL);
+ WARN_ON(qc == NULL);
drv_stat = ata_wait_idle(ap);
if (!ata_ok(drv_stat)) {
ap->hsm_task_state = HSM_ST_IDLE;
- assert(qc->err_mask == 0);
+ WARN_ON(qc->err_mask);
ata_poll_qc_complete(qc);
/* another command may start at this point */
/**
- * swap_buf_le16 - swap halves of 16-words in place
+ * swap_buf_le16 - swap halves of 16-bit words in place
* @buf: Buffer to swap
* @buf_words: Number of 16-bit words in buffer.
*
err_out:
printk(KERN_INFO "ata%u: dev %u: ATAPI check failed\n",
ap->id, dev->devno);
- qc->err_mask |= AC_ERR_ATA_BUS;
+ qc->err_mask |= AC_ERR_HSM;
ap->hsm_task_state = HSM_ST_ERR;
}
}
qc = ata_qc_from_tag(ap, ap->active_tag);
- assert(qc != NULL);
+ WARN_ON(qc == NULL);
/* check error */
if (status & (ATA_ERR | ATA_DF)) {
} else {
/* handle BSY=0, DRQ=0 as error */
if ((status & ATA_DRQ) == 0) {
- qc->err_mask |= AC_ERR_ATA_BUS;
+ qc->err_mask |= AC_ERR_HSM;
ap->hsm_task_state = HSM_ST_ERR;
return;
}
struct ata_queued_cmd *qc;
qc = ata_qc_from_tag(ap, ap->active_tag);
- assert(qc != NULL);
+ WARN_ON(qc == NULL);
if (qc->tf.command != ATA_CMD_PACKET)
printk(KERN_WARNING "ata%u: PIO error\n", ap->id);
- /* make sure qc->err_mask is available to
+ /* make sure qc->err_mask is available to
* know what's wrong and recover
*/
- assert(qc->err_mask);
+ WARN_ON(qc->err_mask == 0);
ap->hsm_task_state = HSM_ST_IDLE;
static void ata_pio_task(void *_data)
{
struct ata_port *ap = _data;
- unsigned long timeout;
- int qc_completed;
+ unsigned long timeout;
+ int qc_completed;
+
+fsm_start:
+ timeout = 0;
+ qc_completed = 0;
+
+ switch (ap->hsm_task_state) {
+ case HSM_ST_IDLE:
+ return;
+
+ case HSM_ST:
+ ata_pio_block(ap);
+ break;
+
+ case HSM_ST_LAST:
+ qc_completed = ata_pio_complete(ap);
+ break;
+
+ case HSM_ST_POLL:
+ case HSM_ST_LAST_POLL:
+ timeout = ata_pio_poll(ap);
+ break;
+
+ case HSM_ST_TMOUT:
+ case HSM_ST_ERR:
+ ata_pio_error(ap);
+ return;
+ }
+
+ if (timeout)
+ ata_port_queue_task(ap, ata_pio_task, ap, timeout);
+ else if (!qc_completed)
+ goto fsm_start;
+}
+
+/**
+ * atapi_packet_task - Write CDB bytes to hardware
+ * @_data: Port to which ATAPI device is attached.
+ *
+ * When device has indicated its readiness to accept
+ * a CDB, this function is called. Send the CDB.
+ * If DMA is to be performed, exit immediately.
+ * Otherwise, we are in polling mode, so poll
+ * status under operation succeeds or fails.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep)
+ */
+
+static void atapi_packet_task(void *_data)
+{
+ struct ata_port *ap = _data;
+ struct ata_queued_cmd *qc;
+ u8 status;
-fsm_start:
- timeout = 0;
- qc_completed = 0;
+ qc = ata_qc_from_tag(ap, ap->active_tag);
+ WARN_ON(qc == NULL);
+ WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
- switch (ap->hsm_task_state) {
- case HSM_ST_IDLE:
- return;
+ /* sleep-wait for BSY to clear */
+ DPRINTK("busy wait\n");
+ if (ata_busy_sleep(ap, ATA_TMOUT_CDB_QUICK, ATA_TMOUT_CDB)) {
+ qc->err_mask |= AC_ERR_TIMEOUT;
+ goto err_out;
+ }
- case HSM_ST:
- ata_pio_block(ap);
- break;
+ /* make sure DRQ is set */
+ status = ata_chk_status(ap);
+ if ((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ) {
+ qc->err_mask |= AC_ERR_HSM;
+ goto err_out;
+ }
- case HSM_ST_LAST:
- qc_completed = ata_pio_complete(ap);
- break;
+ /* send SCSI cdb */
+ DPRINTK("send cdb\n");
+ WARN_ON(qc->dev->cdb_len < 12);
- case HSM_ST_POLL:
- case HSM_ST_LAST_POLL:
- timeout = ata_pio_poll(ap);
- break;
+ if (qc->tf.protocol == ATA_PROT_ATAPI_DMA ||
+ qc->tf.protocol == ATA_PROT_ATAPI_NODATA) {
+ unsigned long flags;
- case HSM_ST_TMOUT:
- case HSM_ST_ERR:
- ata_pio_error(ap);
- return;
+ /* Once we're done issuing command and kicking bmdma,
+ * irq handler takes over. To not lose irq, we need
+ * to clear NOINTR flag before sending cdb, but
+ * interrupt handler shouldn't be invoked before we're
+ * finished. Hence, the following locking.
+ */
+ spin_lock_irqsave(&ap->host_set->lock, flags);
+ ap->flags &= ~ATA_FLAG_NOINTR;
+ ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1);
+ if (qc->tf.protocol == ATA_PROT_ATAPI_DMA)
+ ap->ops->bmdma_start(qc); /* initiate bmdma */
+ spin_unlock_irqrestore(&ap->host_set->lock, flags);
+ } else {
+ ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1);
+
+ /* PIO commands are handled by polling */
+ ap->hsm_task_state = HSM_ST;
+ ata_port_queue_task(ap, ata_pio_task, ap, 0);
}
- if (timeout)
- queue_delayed_work(ata_wq, &ap->pio_task, timeout);
- else if (!qc_completed)
- goto fsm_start;
+ return;
+
+err_out:
+ ata_poll_qc_complete(qc);
}
/**
DPRINTK("ENTER\n");
- spin_lock_irqsave(&host_set->lock, flags);
+ ap->hsm_task_state = HSM_ST_IDLE;
- /* hack alert! We cannot use the supplied completion
- * function from inside the ->eh_strategy_handler() thread.
- * libata is the only user of ->eh_strategy_handler() in
- * any kernel, so the default scsi_done() assumes it is
- * not being called from the SCSI EH.
- */
- qc->scsidone = scsi_finish_command;
+ spin_lock_irqsave(&host_set->lock, flags);
switch (qc->tf.protocol) {
/* complete taskfile transaction */
qc->err_mask |= ac_err_mask(drv_stat);
- ata_qc_complete(qc);
break;
}
spin_unlock_irqrestore(&host_set->lock, flags);
+ ata_eh_qc_complete(qc);
+
DPRINTK("EXIT\n");
}
void ata_eng_timeout(struct ata_port *ap)
{
- struct ata_queued_cmd *qc;
-
DPRINTK("ENTER\n");
- qc = ata_qc_from_tag(ap, ap->active_tag);
- if (qc)
- ata_qc_timeout(qc);
- else {
- printk(KERN_ERR "ata%u: BUG: timeout without command\n",
- ap->id);
- goto out;
- }
+ ata_qc_timeout(ata_qc_from_tag(ap, ap->active_tag));
-out:
DPRINTK("EXIT\n");
}
return qc;
}
-static void __ata_qc_complete(struct ata_queued_cmd *qc)
-{
- struct ata_port *ap = qc->ap;
- unsigned int tag;
-
- qc->flags = 0;
- tag = qc->tag;
- if (likely(ata_tag_valid(tag))) {
- if (tag == ap->active_tag)
- ap->active_tag = ATA_TAG_POISON;
- qc->tag = ATA_TAG_POISON;
- clear_bit(tag, &ap->qactive);
- }
-}
-
/**
* ata_qc_free - free unused ata_queued_cmd
* @qc: Command to complete
*/
void ata_qc_free(struct ata_queued_cmd *qc)
{
- assert(qc != NULL); /* ata_qc_from_tag _might_ return NULL */
+ struct ata_port *ap = qc->ap;
+ unsigned int tag;
- __ata_qc_complete(qc);
-}
+ WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
-/**
- * ata_qc_complete - Complete an active ATA command
- * @qc: Command to complete
- * @err_mask: ATA Status register contents
- *
- * Indicate to the mid and upper layers that an ATA
- * command has completed, with either an ok or not-ok status.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- */
+ qc->flags = 0;
+ tag = qc->tag;
+ if (likely(ata_tag_valid(tag))) {
+ if (tag == ap->active_tag)
+ ap->active_tag = ATA_TAG_POISON;
+ qc->tag = ATA_TAG_POISON;
+ clear_bit(tag, &ap->qactive);
+ }
+}
-void ata_qc_complete(struct ata_queued_cmd *qc)
+void __ata_qc_complete(struct ata_queued_cmd *qc)
{
- int rc;
-
- assert(qc != NULL); /* ata_qc_from_tag _might_ return NULL */
- assert(qc->flags & ATA_QCFLAG_ACTIVE);
+ WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
+ WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
ata_sg_clean(qc);
qc->flags &= ~ATA_QCFLAG_ACTIVE;
/* call completion callback */
- rc = qc->complete_fn(qc);
-
- /* if callback indicates not to complete command (non-zero),
- * return immediately
- */
- if (rc != 0)
- return;
-
- __ata_qc_complete(qc);
-
- VPRINTK("EXIT\n");
+ qc->complete_fn(qc);
}
static inline int ata_should_dma_map(struct ata_queued_cmd *qc)
case ATA_PROT_ATAPI:
case ATA_PROT_PIO:
- case ATA_PROT_PIO_MULT:
if (ap->flags & ATA_FLAG_PIO_DMA)
return 1;
* spin_lock_irqsave(host_set lock)
*
* RETURNS:
- * Zero on success, negative on error.
+ * Zero on success, AC_ERR_* mask on failure
*/
-int ata_qc_issue(struct ata_queued_cmd *qc)
+unsigned int ata_qc_issue(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
if (ata_should_dma_map(qc)) {
if (qc->flags & ATA_QCFLAG_SG) {
if (ata_sg_setup(qc))
- goto err_out;
+ goto sg_err;
} else if (qc->flags & ATA_QCFLAG_SINGLE) {
if (ata_sg_setup_one(qc))
- goto err_out;
+ goto sg_err;
}
} else {
qc->flags &= ~ATA_QCFLAG_DMAMAP;
return ap->ops->qc_issue(qc);
-err_out:
- return -1;
-}
-
-
-/**
- * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
- * @qc: command to issue to device
- *
- * Using various libata functions and hooks, this function
- * starts an ATA command. ATA commands are grouped into
- * classes called "protocols", and issuing each type of protocol
- * is slightly different.
- *
- * May be used as the qc_issue() entry in ata_port_operations.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- *
- * RETURNS:
- * Zero on success, negative on error.
- */
-
-int ata_qc_issue_prot(struct ata_queued_cmd *qc)
-{
- struct ata_port *ap = qc->ap;
-
- ata_dev_select(ap, qc->dev->devno, 1, 0);
-
- switch (qc->tf.protocol) {
- case ATA_PROT_NODATA:
- ata_tf_to_host(ap, &qc->tf);
- break;
-
- case ATA_PROT_DMA:
- ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
- ap->ops->bmdma_setup(qc); /* set up bmdma */
- ap->ops->bmdma_start(qc); /* initiate bmdma */
- break;
-
- case ATA_PROT_PIO: /* load tf registers, initiate polling pio */
- ata_qc_set_polling(qc);
- ata_tf_to_host(ap, &qc->tf);
- ap->hsm_task_state = HSM_ST;
- queue_work(ata_wq, &ap->pio_task);
- break;
-
- case ATA_PROT_ATAPI:
- ata_qc_set_polling(qc);
- ata_tf_to_host(ap, &qc->tf);
- queue_work(ata_wq, &ap->packet_task);
- break;
-
- case ATA_PROT_ATAPI_NODATA:
- ap->flags |= ATA_FLAG_NOINTR;
- ata_tf_to_host(ap, &qc->tf);
- queue_work(ata_wq, &ap->packet_task);
- break;
-
- case ATA_PROT_ATAPI_DMA:
- ap->flags |= ATA_FLAG_NOINTR;
- ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
- ap->ops->bmdma_setup(qc); /* set up bmdma */
- queue_work(ata_wq, &ap->packet_task);
- break;
-
- default:
- WARN_ON(1);
- return -1;
- }
-
- return 0;
-}
-
-/**
- * ata_bmdma_setup_mmio - Set up PCI IDE BMDMA transaction
- * @qc: Info associated with this ATA transaction.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- */
-
-static void ata_bmdma_setup_mmio (struct ata_queued_cmd *qc)
-{
- struct ata_port *ap = qc->ap;
- unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE);
- u8 dmactl;
- void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
-
- /* load PRD table addr. */
- mb(); /* make sure PRD table writes are visible to controller */
- writel(ap->prd_dma, mmio + ATA_DMA_TABLE_OFS);
-
- /* specify data direction, triple-check start bit is clear */
- dmactl = readb(mmio + ATA_DMA_CMD);
- dmactl &= ~(ATA_DMA_WR | ATA_DMA_START);
- if (!rw)
- dmactl |= ATA_DMA_WR;
- writeb(dmactl, mmio + ATA_DMA_CMD);
-
- /* issue r/w command */
- ap->ops->exec_command(ap, &qc->tf);
-}
-
-/**
- * ata_bmdma_start_mmio - Start a PCI IDE BMDMA transaction
- * @qc: Info associated with this ATA transaction.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- */
-
-static void ata_bmdma_start_mmio (struct ata_queued_cmd *qc)
-{
- struct ata_port *ap = qc->ap;
- void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
- u8 dmactl;
-
- /* start host DMA transaction */
- dmactl = readb(mmio + ATA_DMA_CMD);
- writeb(dmactl | ATA_DMA_START, mmio + ATA_DMA_CMD);
-
- /* Strictly, one may wish to issue a readb() here, to
- * flush the mmio write. However, control also passes
- * to the hardware at this point, and it will interrupt
- * us when we are to resume control. So, in effect,
- * we don't care when the mmio write flushes.
- * Further, a read of the DMA status register _immediately_
- * following the write may not be what certain flaky hardware
- * is expected, so I think it is best to not add a readb()
- * without first all the MMIO ATA cards/mobos.
- * Or maybe I'm just being paranoid.
- */
-}
-
-/**
- * ata_bmdma_setup_pio - Set up PCI IDE BMDMA transaction (PIO)
- * @qc: Info associated with this ATA transaction.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- */
-
-static void ata_bmdma_setup_pio (struct ata_queued_cmd *qc)
-{
- struct ata_port *ap = qc->ap;
- unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE);
- u8 dmactl;
-
- /* load PRD table addr. */
- outl(ap->prd_dma, ap->ioaddr.bmdma_addr + ATA_DMA_TABLE_OFS);
-
- /* specify data direction, triple-check start bit is clear */
- dmactl = inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
- dmactl &= ~(ATA_DMA_WR | ATA_DMA_START);
- if (!rw)
- dmactl |= ATA_DMA_WR;
- outb(dmactl, ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
-
- /* issue r/w command */
- ap->ops->exec_command(ap, &qc->tf);
-}
-
-/**
- * ata_bmdma_start_pio - Start a PCI IDE BMDMA transaction (PIO)
- * @qc: Info associated with this ATA transaction.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- */
-
-static void ata_bmdma_start_pio (struct ata_queued_cmd *qc)
-{
- struct ata_port *ap = qc->ap;
- u8 dmactl;
-
- /* start host DMA transaction */
- dmactl = inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
- outb(dmactl | ATA_DMA_START,
- ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
-}
-
-
-/**
- * ata_bmdma_start - Start a PCI IDE BMDMA transaction
- * @qc: Info associated with this ATA transaction.
- *
- * Writes the ATA_DMA_START flag to the DMA command register.
- *
- * May be used as the bmdma_start() entry in ata_port_operations.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- */
-void ata_bmdma_start(struct ata_queued_cmd *qc)
-{
- if (qc->ap->flags & ATA_FLAG_MMIO)
- ata_bmdma_start_mmio(qc);
- else
- ata_bmdma_start_pio(qc);
-}
-
-
-/**
- * ata_bmdma_setup - Set up PCI IDE BMDMA transaction
- * @qc: Info associated with this ATA transaction.
- *
- * Writes address of PRD table to device's PRD Table Address
- * register, sets the DMA control register, and calls
- * ops->exec_command() to start the transfer.
- *
- * May be used as the bmdma_setup() entry in ata_port_operations.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- */
-void ata_bmdma_setup(struct ata_queued_cmd *qc)
-{
- if (qc->ap->flags & ATA_FLAG_MMIO)
- ata_bmdma_setup_mmio(qc);
- else
- ata_bmdma_setup_pio(qc);
+sg_err:
+ qc->flags &= ~ATA_QCFLAG_DMAMAP;
+ return AC_ERR_SYSTEM;
}
/**
- * ata_bmdma_irq_clear - Clear PCI IDE BMDMA interrupt.
- * @ap: Port associated with this ATA transaction.
+ * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
+ * @qc: command to issue to device
*
- * Clear interrupt and error flags in DMA status register.
+ * Using various libata functions and hooks, this function
+ * starts an ATA command. ATA commands are grouped into
+ * classes called "protocols", and issuing each type of protocol
+ * is slightly different.
*
- * May be used as the irq_clear() entry in ata_port_operations.
+ * May be used as the qc_issue() entry in ata_port_operations.
*
* LOCKING:
* spin_lock_irqsave(host_set lock)
+ *
+ * RETURNS:
+ * Zero on success, AC_ERR_* mask on failure
*/
-void ata_bmdma_irq_clear(struct ata_port *ap)
+unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc)
{
- if (ap->flags & ATA_FLAG_MMIO) {
- void __iomem *mmio = ((void __iomem *) ap->ioaddr.bmdma_addr) + ATA_DMA_STATUS;
- writeb(readb(mmio), mmio);
- } else {
- unsigned long addr = ap->ioaddr.bmdma_addr + ATA_DMA_STATUS;
- outb(inb(addr), addr);
- }
+ struct ata_port *ap = qc->ap;
-}
+ ata_dev_select(ap, qc->dev->devno, 1, 0);
+ switch (qc->tf.protocol) {
+ case ATA_PROT_NODATA:
+ ata_tf_to_host(ap, &qc->tf);
+ break;
-/**
- * ata_bmdma_status - Read PCI IDE BMDMA status
- * @ap: Port associated with this ATA transaction.
- *
- * Read and return BMDMA status register.
- *
- * May be used as the bmdma_status() entry in ata_port_operations.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- */
+ case ATA_PROT_DMA:
+ ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
+ ap->ops->bmdma_setup(qc); /* set up bmdma */
+ ap->ops->bmdma_start(qc); /* initiate bmdma */
+ break;
-u8 ata_bmdma_status(struct ata_port *ap)
-{
- u8 host_stat;
- if (ap->flags & ATA_FLAG_MMIO) {
- void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
- host_stat = readb(mmio + ATA_DMA_STATUS);
- } else
- host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
- return host_stat;
-}
+ case ATA_PROT_PIO: /* load tf registers, initiate polling pio */
+ ata_qc_set_polling(qc);
+ ata_tf_to_host(ap, &qc->tf);
+ ap->hsm_task_state = HSM_ST;
+ ata_port_queue_task(ap, ata_pio_task, ap, 0);
+ break;
+ case ATA_PROT_ATAPI:
+ ata_qc_set_polling(qc);
+ ata_tf_to_host(ap, &qc->tf);
+ ata_port_queue_task(ap, atapi_packet_task, ap, 0);
+ break;
-/**
- * ata_bmdma_stop - Stop PCI IDE BMDMA transfer
- * @qc: Command we are ending DMA for
- *
- * Clears the ATA_DMA_START flag in the dma control register
- *
- * May be used as the bmdma_stop() entry in ata_port_operations.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- */
+ case ATA_PROT_ATAPI_NODATA:
+ ap->flags |= ATA_FLAG_NOINTR;
+ ata_tf_to_host(ap, &qc->tf);
+ ata_port_queue_task(ap, atapi_packet_task, ap, 0);
+ break;
-void ata_bmdma_stop(struct ata_queued_cmd *qc)
-{
- struct ata_port *ap = qc->ap;
- if (ap->flags & ATA_FLAG_MMIO) {
- void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
+ case ATA_PROT_ATAPI_DMA:
+ ap->flags |= ATA_FLAG_NOINTR;
+ ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
+ ap->ops->bmdma_setup(qc); /* set up bmdma */
+ ata_port_queue_task(ap, atapi_packet_task, ap, 0);
+ break;
- /* clear start/stop bit */
- writeb(readb(mmio + ATA_DMA_CMD) & ~ATA_DMA_START,
- mmio + ATA_DMA_CMD);
- } else {
- /* clear start/stop bit */
- outb(inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD) & ~ATA_DMA_START,
- ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
+ default:
+ WARN_ON(1);
+ return AC_ERR_SYSTEM;
}
- /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
- ata_altstatus(ap); /* dummy read */
+ return 0;
}
/**
#ifdef ATA_IRQ_TRAP
if ((ap->stats.idle_irq % 1000) == 0) {
- handled = 1;
ata_irq_ack(ap, 0); /* debug trap */
printk(KERN_WARNING "ata%d: irq trap\n", ap->id);
+ return 1;
}
#endif
return 0; /* irq not handled */
return IRQ_RETVAL(handled);
}
-/**
- * atapi_packet_task - Write CDB bytes to hardware
- * @_data: Port to which ATAPI device is attached.
- *
- * When device has indicated its readiness to accept
- * a CDB, this function is called. Send the CDB.
- * If DMA is to be performed, exit immediately.
- * Otherwise, we are in polling mode, so poll
- * status under operation succeeds or fails.
- *
- * LOCKING:
- * Kernel thread context (may sleep)
- */
-
-static void atapi_packet_task(void *_data)
-{
- struct ata_port *ap = _data;
- struct ata_queued_cmd *qc;
- u8 status;
-
- qc = ata_qc_from_tag(ap, ap->active_tag);
- assert(qc != NULL);
- assert(qc->flags & ATA_QCFLAG_ACTIVE);
-
- /* sleep-wait for BSY to clear */
- DPRINTK("busy wait\n");
- if (ata_busy_sleep(ap, ATA_TMOUT_CDB_QUICK, ATA_TMOUT_CDB)) {
- qc->err_mask |= AC_ERR_ATA_BUS;
- goto err_out;
- }
-
- /* make sure DRQ is set */
- status = ata_chk_status(ap);
- if ((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ) {
- qc->err_mask |= AC_ERR_ATA_BUS;
- goto err_out;
- }
-
- /* send SCSI cdb */
- DPRINTK("send cdb\n");
- assert(ap->cdb_len >= 12);
-
- if (qc->tf.protocol == ATA_PROT_ATAPI_DMA ||
- qc->tf.protocol == ATA_PROT_ATAPI_NODATA) {
- unsigned long flags;
-
- /* Once we're done issuing command and kicking bmdma,
- * irq handler takes over. To not lose irq, we need
- * to clear NOINTR flag before sending cdb, but
- * interrupt handler shouldn't be invoked before we're
- * finished. Hence, the following locking.
- */
- spin_lock_irqsave(&ap->host_set->lock, flags);
- ap->flags &= ~ATA_FLAG_NOINTR;
- ata_data_xfer(ap, qc->cdb, ap->cdb_len, 1);
- if (qc->tf.protocol == ATA_PROT_ATAPI_DMA)
- ap->ops->bmdma_start(qc); /* initiate bmdma */
- spin_unlock_irqrestore(&ap->host_set->lock, flags);
- } else {
- ata_data_xfer(ap, qc->cdb, ap->cdb_len, 1);
-
- /* PIO commands are handled by polling */
- ap->hsm_task_state = HSM_ST;
- queue_work(ata_wq, &ap->pio_task);
- }
-
- return;
-
-err_out:
- ata_poll_qc_complete(qc);
-}
-
-
-/**
- * ata_port_start - Set port up for dma.
- * @ap: Port to initialize
- *
- * Called just after data structures for each port are
- * initialized. Allocates space for PRD table.
- *
- * May be used as the port_start() entry in ata_port_operations.
- *
- * LOCKING:
- * Inherited from caller.
- */
/*
* Execute a 'simple' command, that only consists of the opcode 'cmd' itself,
/**
* ata_device_resume - wakeup a previously suspended devices
+ * @ap: port the device is connected to
+ * @dev: the device to resume
*
* Kick the drive back into action, by sending it an idle immediate
* command and making sure its transfer mode matches between drive
/**
* ata_device_suspend - prepare a device for suspend
+ * @ap: port the device is connected to
+ * @dev: the device to suspend
*
* Flush the cache on the drive, if appropriate, then issue a
* standbynow command.
- *
*/
-int ata_device_suspend(struct ata_port *ap, struct ata_device *dev)
+int ata_device_suspend(struct ata_port *ap, struct ata_device *dev, pm_message_t state)
{
if (!ata_dev_present(dev))
return 0;
if (dev->class == ATA_DEV_ATA)
ata_flush_cache(ap, dev);
- ata_standby_drive(ap, dev);
+ if (state.event != PM_EVENT_FREEZE)
+ ata_standby_drive(ap, dev);
ap->flags |= ATA_FLAG_SUSPENDED;
return 0;
}
+/**
+ * ata_port_start - Set port up for dma.
+ * @ap: Port to initialize
+ *
+ * Called just after data structures for each port are
+ * initialized. Allocates space for PRD table.
+ *
+ * May be used as the port_start() entry in ata_port_operations.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ */
+
int ata_port_start (struct ata_port *ap)
{
- struct device *dev = ap->host_set->dev;
+ struct device *dev = ap->dev;
int rc;
ap->prd = dma_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, GFP_KERNEL);
void ata_port_stop (struct ata_port *ap)
{
- struct device *dev = ap->host_set->dev;
+ struct device *dev = ap->dev;
dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);
ata_pad_free(ap, dev);
ap->host = host;
ap->ctl = ATA_DEVCTL_OBS;
ap->host_set = host_set;
+ ap->dev = ent->dev;
ap->port_no = port_no;
ap->hard_port_no =
ent->legacy_mode ? ent->hard_port_no : port_no;
ap->active_tag = ATA_TAG_POISON;
ap->last_ctl = 0xFF;
- INIT_WORK(&ap->packet_task, atapi_packet_task, ap);
- INIT_WORK(&ap->pio_task, ata_pio_task, ap);
+ INIT_WORK(&ap->port_task, NULL, NULL);
+ INIT_LIST_HEAD(&ap->eh_done_q);
- for (i = 0; i < ATA_MAX_DEVICES; i++)
- ap->device[i].devno = i;
+ for (i = 0; i < ATA_MAX_DEVICES; i++) {
+ struct ata_device *dev = &ap->device[i];
+ dev->devno = i;
+ dev->pio_mask = UINT_MAX;
+ dev->mwdma_mask = UINT_MAX;
+ dev->udma_mask = UINT_MAX;
+ }
#ifdef ATA_IRQ_TRAP
ap->stats.unhandled_irq = 1;
int rc;
DPRINTK("ENTER\n");
+
+ if (!ent->port_ops->probe_reset &&
+ !(ent->host_flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST))) {
+ printk(KERN_ERR "ata%u: no reset mechanism available\n",
+ port_no);
+ return NULL;
+ }
+
host = scsi_host_alloc(ent->sht, sizeof(struct ata_port));
if (!host)
return NULL;
+ host->transportt = &ata_scsi_transport_template;
+
ap = (struct ata_port *) &host->hostdata[0];
ata_host_init(ap, host, host_set, ent, port_no);
host_set->mmio_base = ent->mmio_base;
host_set->private_data = ent->private_data;
host_set->ops = ent->port_ops;
+ host_set->flags = ent->host_set_flags;
/* register each port bound to this device */
for (i = 0; i < ent->n_ports; i++) {
ap = host_set->ports[i];
- DPRINTK("ata%u: probe begin\n", ap->id);
+ DPRINTK("ata%u: bus probe begin\n", ap->id);
rc = ata_bus_probe(ap);
- DPRINTK("ata%u: probe end\n", ap->id);
+ DPRINTK("ata%u: bus probe end\n", ap->id);
if (rc) {
/* FIXME: do something useful here?
}
/* probes are done, now scan each port's disk(s) */
- DPRINTK("probe begin\n");
+ DPRINTK("host probe begin\n");
for (i = 0; i < count; i++) {
struct ata_port *ap = host_set->ports[i];
* ata_host_set_remove - PCI layer callback for device removal
* @host_set: ATA host set that was removed
*
- * Unregister all objects associated with this host set. Free those
+ * Unregister all objects associated with this host set. Free those
* objects.
*
* LOCKING:
int ata_scsi_release(struct Scsi_Host *host)
{
struct ata_port *ap = (struct ata_port *) &host->hostdata[0];
+ int i;
DPRINTK("ENTER\n");
ap->ops->port_disable(ap);
ata_host_remove(ap, 0);
+ for (i = 0; i < ATA_MAX_DEVICES; i++)
+ kfree(ap->device[i].id);
DPRINTK("EXIT\n");
return 1;
ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD;
}
-static struct ata_probe_ent *
-ata_probe_ent_alloc(struct device *dev, const struct ata_port_info *port)
-{
- struct ata_probe_ent *probe_ent;
-
- probe_ent = kzalloc(sizeof(*probe_ent), GFP_KERNEL);
- if (!probe_ent) {
- printk(KERN_ERR DRV_NAME "(%s): out of memory\n",
- kobject_name(&(dev->kobj)));
- return NULL;
- }
-
- INIT_LIST_HEAD(&probe_ent->node);
- probe_ent->dev = dev;
-
- probe_ent->sht = port->sht;
- probe_ent->host_flags = port->host_flags;
- probe_ent->pio_mask = port->pio_mask;
- probe_ent->mwdma_mask = port->mwdma_mask;
- probe_ent->udma_mask = port->udma_mask;
- probe_ent->port_ops = port->port_ops;
-
- return probe_ent;
-}
-
-
#ifdef CONFIG_PCI
pci_iounmap(pdev, host_set->mmio_base);
}
-/**
- * ata_pci_init_native_mode - Initialize native-mode driver
- * @pdev: pci device to be initialized
- * @port: array[2] of pointers to port info structures.
- * @ports: bitmap of ports present
- *
- * Utility function which allocates and initializes an
- * ata_probe_ent structure for a standard dual-port
- * PIO-based IDE controller. The returned ata_probe_ent
- * structure can be passed to ata_device_add(). The returned
- * ata_probe_ent structure should then be freed with kfree().
- *
- * The caller need only pass the address of the primary port, the
- * secondary will be deduced automatically. If the device has non
- * standard secondary port mappings this function can be called twice,
- * once for each interface.
- */
-
-struct ata_probe_ent *
-ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int ports)
-{
- struct ata_probe_ent *probe_ent =
- ata_probe_ent_alloc(pci_dev_to_dev(pdev), port[0]);
- int p = 0;
-
- if (!probe_ent)
- return NULL;
-
- probe_ent->irq = pdev->irq;
- probe_ent->irq_flags = SA_SHIRQ;
- probe_ent->private_data = port[0]->private_data;
-
- if (ports & ATA_PORT_PRIMARY) {
- probe_ent->port[p].cmd_addr = pci_resource_start(pdev, 0);
- probe_ent->port[p].altstatus_addr =
- probe_ent->port[p].ctl_addr =
- pci_resource_start(pdev, 1) | ATA_PCI_CTL_OFS;
- probe_ent->port[p].bmdma_addr = pci_resource_start(pdev, 4);
- ata_std_ports(&probe_ent->port[p]);
- p++;
- }
-
- if (ports & ATA_PORT_SECONDARY) {
- probe_ent->port[p].cmd_addr = pci_resource_start(pdev, 2);
- probe_ent->port[p].altstatus_addr =
- probe_ent->port[p].ctl_addr =
- pci_resource_start(pdev, 3) | ATA_PCI_CTL_OFS;
- probe_ent->port[p].bmdma_addr = pci_resource_start(pdev, 4) + 8;
- ata_std_ports(&probe_ent->port[p]);
- p++;
- }
-
- probe_ent->n_ports = p;
- return probe_ent;
-}
-
-static struct ata_probe_ent *ata_pci_init_legacy_port(struct pci_dev *pdev, struct ata_port_info *port, int port_num)
-{
- struct ata_probe_ent *probe_ent;
-
- probe_ent = ata_probe_ent_alloc(pci_dev_to_dev(pdev), port);
- if (!probe_ent)
- return NULL;
-
- probe_ent->legacy_mode = 1;
- probe_ent->n_ports = 1;
- probe_ent->hard_port_no = port_num;
- probe_ent->private_data = port->private_data;
-
- switch(port_num)
- {
- case 0:
- probe_ent->irq = 14;
- probe_ent->port[0].cmd_addr = 0x1f0;
- probe_ent->port[0].altstatus_addr =
- probe_ent->port[0].ctl_addr = 0x3f6;
- break;
- case 1:
- probe_ent->irq = 15;
- probe_ent->port[0].cmd_addr = 0x170;
- probe_ent->port[0].altstatus_addr =
- probe_ent->port[0].ctl_addr = 0x376;
- break;
- }
- probe_ent->port[0].bmdma_addr = pci_resource_start(pdev, 4) + 8 * port_num;
- ata_std_ports(&probe_ent->port[0]);
- return probe_ent;
-}
-
-/**
- * ata_pci_init_one - Initialize/register PCI IDE host controller
- * @pdev: Controller to be initialized
- * @port_info: Information from low-level host driver
- * @n_ports: Number of ports attached to host controller
- *
- * This is a helper function which can be called from a driver's
- * xxx_init_one() probe function if the hardware uses traditional
- * IDE taskfile registers.
- *
- * This function calls pci_enable_device(), reserves its register
- * regions, sets the dma mask, enables bus master mode, and calls
- * ata_device_add()
- *
- * LOCKING:
- * Inherited from PCI layer (may sleep).
- *
- * RETURNS:
- * Zero on success, negative on errno-based value on error.
- */
-
-int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
- unsigned int n_ports)
-{
- struct ata_probe_ent *probe_ent = NULL, *probe_ent2 = NULL;
- struct ata_port_info *port[2];
- u8 tmp8, mask;
- unsigned int legacy_mode = 0;
- int disable_dev_on_err = 1;
- int rc;
-
- DPRINTK("ENTER\n");
-
- port[0] = port_info[0];
- if (n_ports > 1)
- port[1] = port_info[1];
- else
- port[1] = port[0];
-
- if ((port[0]->host_flags & ATA_FLAG_NO_LEGACY) == 0
- && (pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) {
- /* TODO: What if one channel is in native mode ... */
- pci_read_config_byte(pdev, PCI_CLASS_PROG, &tmp8);
- mask = (1 << 2) | (1 << 0);
- if ((tmp8 & mask) != mask)
- legacy_mode = (1 << 3);
- }
-
- /* FIXME... */
- if ((!legacy_mode) && (n_ports > 2)) {
- printk(KERN_ERR "ata: BUG: native mode, n_ports > 2\n");
- n_ports = 2;
- /* For now */
- }
-
- /* FIXME: Really for ATA it isn't safe because the device may be
- multi-purpose and we want to leave it alone if it was already
- enabled. Secondly for shared use as Arjan says we want refcounting
-
- Checking dev->is_enabled is insufficient as this is not set at
- boot for the primary video which is BIOS enabled
- */
-
- rc = pci_enable_device(pdev);
- if (rc)
- return rc;
-
- rc = pci_request_regions(pdev, DRV_NAME);
- if (rc) {
- disable_dev_on_err = 0;
- goto err_out;
- }
-
- /* FIXME: Should use platform specific mappers for legacy port ranges */
- if (legacy_mode) {
- if (!request_region(0x1f0, 8, "libata")) {
- struct resource *conflict, res;
- res.start = 0x1f0;
- res.end = 0x1f0 + 8 - 1;
- conflict = ____request_resource(&ioport_resource, &res);
- if (!strcmp(conflict->name, "libata"))
- legacy_mode |= (1 << 0);
- else {
- disable_dev_on_err = 0;
- printk(KERN_WARNING "ata: 0x1f0 IDE port busy\n");
- }
- } else
- legacy_mode |= (1 << 0);
-
- if (!request_region(0x170, 8, "libata")) {
- struct resource *conflict, res;
- res.start = 0x170;
- res.end = 0x170 + 8 - 1;
- conflict = ____request_resource(&ioport_resource, &res);
- if (!strcmp(conflict->name, "libata"))
- legacy_mode |= (1 << 1);
- else {
- disable_dev_on_err = 0;
- printk(KERN_WARNING "ata: 0x170 IDE port busy\n");
- }
- } else
- legacy_mode |= (1 << 1);
- }
-
- /* we have legacy mode, but all ports are unavailable */
- if (legacy_mode == (1 << 3)) {
- rc = -EBUSY;
- goto err_out_regions;
- }
-
- rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
- if (rc)
- goto err_out_regions;
- rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
- if (rc)
- goto err_out_regions;
-
- if (legacy_mode) {
- if (legacy_mode & (1 << 0))
- probe_ent = ata_pci_init_legacy_port(pdev, port[0], 0);
- if (legacy_mode & (1 << 1))
- probe_ent2 = ata_pci_init_legacy_port(pdev, port[1], 1);
- } else {
- if (n_ports == 2)
- probe_ent = ata_pci_init_native_mode(pdev, port, ATA_PORT_PRIMARY | ATA_PORT_SECONDARY);
- else
- probe_ent = ata_pci_init_native_mode(pdev, port, ATA_PORT_PRIMARY);
- }
- if (!probe_ent && !probe_ent2) {
- rc = -ENOMEM;
- goto err_out_regions;
- }
-
- pci_set_master(pdev);
-
- /* FIXME: check ata_device_add return */
- if (legacy_mode) {
- if (legacy_mode & (1 << 0))
- ata_device_add(probe_ent);
- if (legacy_mode & (1 << 1))
- ata_device_add(probe_ent2);
- } else
- ata_device_add(probe_ent);
-
- kfree(probe_ent);
- kfree(probe_ent2);
-
- return 0;
-
-err_out_regions:
- if (legacy_mode & (1 << 0))
- release_region(0x1f0, 8);
- if (legacy_mode & (1 << 1))
- release_region(0x170, 8);
- pci_release_regions(pdev);
-err_out:
- if (disable_dev_on_err)
- pci_disable_device(pdev);
- return rc;
-}
-
/**
* ata_pci_remove_one - PCI layer callback for device removal
* @pdev: PCI device that was removed
EXPORT_SYMBOL_GPL(ata_host_set_remove);
EXPORT_SYMBOL_GPL(ata_sg_init);
EXPORT_SYMBOL_GPL(ata_sg_init_one);
-EXPORT_SYMBOL_GPL(ata_qc_complete);
+EXPORT_SYMBOL_GPL(__ata_qc_complete);
EXPORT_SYMBOL_GPL(ata_qc_issue_prot);
EXPORT_SYMBOL_GPL(ata_eng_timeout);
EXPORT_SYMBOL_GPL(ata_tf_load);
EXPORT_SYMBOL_GPL(ata_host_stop);
EXPORT_SYMBOL_GPL(ata_interrupt);
EXPORT_SYMBOL_GPL(ata_qc_prep);
+EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
EXPORT_SYMBOL_GPL(ata_bmdma_setup);
EXPORT_SYMBOL_GPL(ata_bmdma_start);
EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear);
EXPORT_SYMBOL_GPL(sata_phy_reset);
EXPORT_SYMBOL_GPL(__sata_phy_reset);
EXPORT_SYMBOL_GPL(ata_bus_reset);
+EXPORT_SYMBOL_GPL(ata_std_probeinit);
+EXPORT_SYMBOL_GPL(ata_std_softreset);
+EXPORT_SYMBOL_GPL(sata_std_hardreset);
+EXPORT_SYMBOL_GPL(ata_std_postreset);
+EXPORT_SYMBOL_GPL(ata_std_probe_reset);
+EXPORT_SYMBOL_GPL(ata_drive_probe_reset);
+EXPORT_SYMBOL_GPL(ata_dev_revalidate);
+EXPORT_SYMBOL_GPL(ata_dev_classify);
+EXPORT_SYMBOL_GPL(ata_dev_pair);
EXPORT_SYMBOL_GPL(ata_port_disable);
EXPORT_SYMBOL_GPL(ata_ratelimit);
+EXPORT_SYMBOL_GPL(ata_busy_sleep);
+EXPORT_SYMBOL_GPL(ata_port_queue_task);
EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
EXPORT_SYMBOL_GPL(ata_scsi_error);
EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
EXPORT_SYMBOL_GPL(ata_scsi_release);
EXPORT_SYMBOL_GPL(ata_host_intr);
-EXPORT_SYMBOL_GPL(ata_dev_classify);
-EXPORT_SYMBOL_GPL(ata_dev_id_string);
-EXPORT_SYMBOL_GPL(ata_dev_config);
+EXPORT_SYMBOL_GPL(ata_id_string);
+EXPORT_SYMBOL_GPL(ata_id_c_string);
EXPORT_SYMBOL_GPL(ata_scsi_simulate);
+EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
+EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
EXPORT_SYMBOL_GPL(ata_timing_compute);
EXPORT_SYMBOL_GPL(ata_pci_remove_one);
EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
EXPORT_SYMBOL_GPL(ata_pci_device_resume);
+EXPORT_SYMBOL_GPL(ata_pci_default_filter);
+EXPORT_SYMBOL_GPL(ata_pci_clear_simplex);
#endif /* CONFIG_PCI */
EXPORT_SYMBOL_GPL(ata_device_suspend);
git.samba.org / sfrench / cifs-2.6.git / blobdiff