*
*/
+#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include "libata.h"
-/* debounce timing parameters in msecs { interval, duration, timeout } */
-const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 };
-const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 };
-const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 };
-
-static unsigned int ata_dev_init_params(struct ata_device *dev,
- u16 heads, u16 sectors);
-static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
-static void ata_dev_xfermask(struct ata_device *dev);
+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 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_unique_id = 1;
static struct workqueue_struct *ata_wq;
-struct workqueue_struct *ata_aux_wq;
-
-int atapi_enabled = 1;
+int atapi_enabled = 0;
module_param(atapi_enabled, int, 0444);
MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)");
-int atapi_dmadir = 0;
-module_param(atapi_dmadir, int, 0444);
-MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
-
int libata_fua = 0;
module_param_named(fua, libata_fua, int, 0444);
MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)");
-static int ata_probe_timeout = ATA_TMOUT_INTERNAL / HZ;
-module_param(ata_probe_timeout, int, 0444);
-MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
-
MODULE_AUTHOR("Jeff Garzik");
MODULE_DESCRIPTION("Library module for ATA devices");
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_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
- * @pio_mask: pio_mask
- * @mwdma_mask: mwdma_mask
- * @udma_mask: udma_mask
+ * ata_udma_string - convert UDMA bit offset to string
+ * @mask: mask of bits supported; only highest bit counts.
*
- * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
- * unsigned int xfer_mask.
+ * Determine string which represents the highest speed
+ * (highest bit in @udma_mask).
*
* LOCKING:
* None.
*
* RETURNS:
- * Packed xfer_mask.
+ * Constant C string representing highest speed listed in
+ * @udma_mask, or the constant C string "<n/a>".
*/
-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);
-}
-/**
- * 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)
+static const char *ata_mode_string(unsigned int mask)
{
- 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;
-}
+ int i;
-static const struct ata_xfer_ent {
- 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, },
-};
+ 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;
-/**
- * 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;
+ return "<n/a>";
- 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;
+out:
+ return xfer_mode_str[i];
}
/**
- * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
- * @xfer_mode: XFER_* of interest
+ * 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.
*
- * Return matching xfer_mask for @xfer_mode.
+ * 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:
- * None.
- *
- * RETURNS:
- * Matching xfer_mask, 0 if no match found.
+ * caller.
*/
-static unsigned int ata_xfer_mode2mask(u8 xfer_mode)
+
+static unsigned int ata_pio_devchk(struct ata_port *ap,
+ unsigned int device)
{
- 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 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 const char *sata_spd_string(unsigned int spd)
-{
- static const char * const spd_str[] = {
- "1.5 Gbps",
- "3.0 Gbps",
- };
-
- if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
- return "<unknown>";
- return spd_str[spd - 1];
-}
-
-void ata_dev_disable(struct ata_device *dev)
-{
- if (ata_dev_enabled(dev) && ata_msg_drv(dev->ap)) {
- ata_dev_printk(dev, KERN_WARNING, "disabled\n");
- 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;
+ struct ata_ioports *ioaddr = &ap->ioaddr;
+ u8 nsect, lbal;
ap->ops->dev_select(ap, device);
* 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 unsigned int
-ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err)
+static u8 ata_dev_try_classify(struct ata_port *ap, unsigned int device)
{
+ 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;
- if (r_err)
- *r_err = err;
+
+ dev->class = ATA_DEV_NONE;
/* see if device passed diags */
if (err == 1)
else if ((device == 0) && (err == 0x81))
/* do nothing */ ;
else
- return ATA_DEV_NONE;
+ return err;
- /* determine if device is ATA or ATAPI */
+ /* determine if device if ATA or ATAPI */
class = ata_dev_classify(&tf);
-
if (class == ATA_DEV_UNKNOWN)
- return ATA_DEV_NONE;
+ return err;
if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0))
- return ATA_DEV_NONE;
- return class;
+ return err;
+
+ dev->class = class;
+
+ return err;
}
/**
- * ata_id_string - Convert IDENTIFY DEVICE page into string
+ * ata_dev_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_id_string(const u16 *id, unsigned char *s,
- unsigned int ofs, unsigned int len)
+void ata_dev_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
void ata_dev_select(struct ata_port *ap, unsigned int device,
unsigned int wait, unsigned int can_sleep)
{
- if (ata_msg_probe(ap))
- ata_port_printk(ap, KERN_INFO, "ata_dev_select: ENTER, ata%u: "
- "device %u, wait %u\n", ap->id, device, wait);
+ VPRINTK("ENTER, ata%u: device %u, wait %u\n",
+ ap->id, device, wait);
if (wait)
ata_wait_idle(ap);
/**
* ata_dump_id - IDENTIFY DEVICE info debugging output
- * @id: IDENTIFY DEVICE page to dump
+ * @dev: Device whose IDENTIFY DEVICE page we will dump
*
- * Dump selected 16-bit words from the given IDENTIFY DEVICE
- * page.
+ * Dump selected 16-bit words from a detected device's
+ * IDENTIFY PAGE page.
*
* LOCKING:
* caller.
*/
-static inline void ata_dump_id(const u16 *id)
+static inline void ata_dump_id(const struct ata_device *dev)
{
DPRINTK("49==0x%04x "
"53==0x%04x "
"63==0x%04x "
"64==0x%04x "
"75==0x%04x \n",
- id[49],
- id[53],
- id[63],
- id[64],
- id[75]);
+ dev->id[49],
+ dev->id[53],
+ dev->id[63],
+ dev->id[64],
+ dev->id[75]);
DPRINTK("80==0x%04x "
"81==0x%04x "
"82==0x%04x "
"83==0x%04x "
"84==0x%04x \n",
- id[80],
- id[81],
- id[82],
- id[83],
- id[84]);
+ dev->id[80],
+ dev->id[81],
+ dev->id[82],
+ dev->id[83],
+ dev->id[84]);
DPRINTK("88==0x%04x "
"93==0x%04x\n",
- id[88],
- id[93]);
+ dev->id[88],
+ dev->id[93]);
}
-/**
- * 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.
+/*
+ * Compute the PIO modes available for this device. This is not as
+ * trivial as it seems if we must consider early devices correctly.
*
- * RETURNS:
- * Computed xfermask
+ * FIXME: pre IDE drive timing (do we care ?).
*/
-static unsigned int ata_id_xfermask(const u16 *id)
+
+static unsigned int ata_pio_modes(const struct ata_device *adev)
{
- unsigned int pio_mask, mwdma_mask, udma_mask;
+ u16 modes;
/* Usual case. Word 53 indicates word 64 is valid */
- 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 (adev->id[ATA_ID_FIELD_VALID] & (1 << 1)) {
+ modes = adev->id[ATA_ID_PIO_MODES] & 0x03;
+ modes <<= 3;
+ modes |= 0x7;
+ return modes;
}
- 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);
-}
-
-/**
- * ata_port_queue_task - Queue port_task
- * @ap: The ata_port to queue port_task for
- * @fn: workqueue function to be scheduled
- * @data: data value to pass to workqueue function
- * @delay: delay time for workqueue function
- *
- * 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->pflags & ATA_PFLAG_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);
+ /* 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 */
}
-/**
- * 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->lock, flags);
- ap->pflags |= ATA_PFLAG_FLUSH_PORT_TASK;
- spin_unlock_irqrestore(ap->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)) {
- if (ata_msg_ctl(ap))
- ata_port_printk(ap, KERN_DEBUG, "%s: flush #2\n",
- __FUNCTION__);
- flush_workqueue(ata_wq);
- }
-
- spin_lock_irqsave(ap->lock, flags);
- ap->pflags &= ~ATA_PFLAG_FLUSH_PORT_TASK;
- spin_unlock_irqrestore(ap->lock, flags);
-
- if (ata_msg_ctl(ap))
- ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __FUNCTION__);
-}
+struct ata_exec_internal_arg {
+ unsigned int err_mask;
+ struct ata_taskfile *tf;
+ struct completion *waiting;
+};
-void ata_qc_complete_internal(struct ata_queued_cmd *qc)
+int ata_qc_complete_internal(struct ata_queued_cmd *qc)
{
- struct completion *waiting = qc->private_data;
+ struct ata_exec_internal_arg *arg = qc->private_data;
+ struct completion *waiting = arg->waiting;
+ 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;
complete(waiting);
+
+ return 0;
}
/**
* ata_exec_internal - execute libata internal command
+ * @ap: Port to which the command is sent
* @dev: Device to which the command is sent
* @tf: Taskfile registers for the command and the result
- * @cdb: CDB for packet command
* @dma_dir: Data tranfer direction of the command
* @buf: Data buffer of the command
* @buflen: Length of data buffer
*
* LOCKING:
* None. Should be called with kernel context, might sleep.
- *
- * RETURNS:
- * Zero on success, AC_ERR_* mask on failure
*/
-unsigned ata_exec_internal(struct ata_device *dev,
- struct ata_taskfile *tf, const u8 *cdb,
- int dma_dir, void *buf, unsigned int buflen)
+
+static unsigned
+ata_exec_internal(struct ata_port *ap, struct ata_device *dev,
+ struct ata_taskfile *tf,
+ int dma_dir, void *buf, unsigned int buflen)
{
- struct ata_port *ap = dev->ap;
u8 command = tf->command;
struct ata_queued_cmd *qc;
- unsigned int tag, preempted_tag;
- u32 preempted_sactive, preempted_qc_active;
- DECLARE_COMPLETION_ONSTACK(wait);
+ DECLARE_COMPLETION(wait);
unsigned long flags;
- unsigned int err_mask;
- int rc;
-
- spin_lock_irqsave(ap->lock, flags);
-
- /* no internal command while frozen */
- if (ap->pflags & ATA_PFLAG_FROZEN) {
- spin_unlock_irqrestore(ap->lock, flags);
- return AC_ERR_SYSTEM;
- }
-
- /* initialize internal qc */
+ struct ata_exec_internal_arg arg;
- /* XXX: Tag 0 is used for drivers with legacy EH as some
- * drivers choke if any other tag is given. This breaks
- * ata_tag_internal() test for those drivers. Don't use new
- * EH stuff without converting to it.
- */
- if (ap->ops->error_handler)
- tag = ATA_TAG_INTERNAL;
- else
- tag = 0;
-
- if (test_and_set_bit(tag, &ap->qc_allocated))
- BUG();
- qc = __ata_qc_from_tag(ap, tag);
+ spin_lock_irqsave(&ap->host_set->lock, flags);
- qc->tag = tag;
- qc->scsicmd = NULL;
- qc->ap = ap;
- qc->dev = dev;
- ata_qc_reinit(qc);
+ qc = ata_qc_new_init(ap, dev);
+ BUG_ON(qc == NULL);
- preempted_tag = ap->active_tag;
- preempted_sactive = ap->sactive;
- preempted_qc_active = ap->qc_active;
- ap->active_tag = ATA_TAG_POISON;
- ap->sactive = 0;
- ap->qc_active = 0;
-
- /* prepare & issue qc */
qc->tf = *tf;
- if (cdb)
- memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
- qc->flags |= ATA_QCFLAG_RESULT_TF;
qc->dma_dir = dma_dir;
if (dma_dir != DMA_NONE) {
ata_sg_init_one(qc, buf, buflen);
qc->nsect = buflen / ATA_SECT_SIZE;
}
- qc->private_data = &wait;
+ arg.waiting = &wait;
+ arg.tf = tf;
+ qc->private_data = &arg;
qc->complete_fn = ata_qc_complete_internal;
- ata_qc_issue(qc);
-
- spin_unlock_irqrestore(ap->lock, flags);
-
- rc = wait_for_completion_timeout(&wait, ata_probe_timeout);
+ if (ata_qc_issue(qc))
+ goto issue_fail;
- ata_port_flush_task(ap);
+ spin_unlock_irqrestore(&ap->host_set->lock, flags);
- if (!rc) {
- spin_lock_irqsave(ap->lock, flags);
+ if (!wait_for_completion_timeout(&wait, ATA_TMOUT_INTERNAL)) {
+ spin_lock_irqsave(&ap->host_set->lock, flags);
/* We're racing with irq here. If we lose, the
* following test prevents us from completing the qc
- * twice. If we win, the port is frozen and will be
- * cleaned up by ->post_internal_cmd().
+ * again. If completion irq occurs after here but
+ * before the caller cleans up, it will result in a
+ * spurious interrupt. We can live with that.
*/
- if (qc->flags & ATA_QCFLAG_ACTIVE) {
- qc->err_mask |= AC_ERR_TIMEOUT;
-
- if (ap->ops->error_handler)
- ata_port_freeze(ap);
- else
- ata_qc_complete(qc);
-
- if (ata_msg_warn(ap))
- ata_dev_printk(dev, KERN_WARNING,
- "qc timeout (cmd 0x%x)\n", command);
+ if (arg.waiting) {
+ qc->err_mask = AC_ERR_OTHER;
+ ata_qc_complete(qc);
+ printk(KERN_WARNING "ata%u: qc timeout (cmd 0x%x)\n",
+ ap->id, command);
}
- spin_unlock_irqrestore(ap->lock, flags);
- }
-
- /* do post_internal_cmd */
- if (ap->ops->post_internal_cmd)
- ap->ops->post_internal_cmd(qc);
-
- if (qc->flags & ATA_QCFLAG_FAILED && !qc->err_mask) {
- if (ata_msg_warn(ap))
- ata_dev_printk(dev, KERN_WARNING,
- "zero err_mask for failed "
- "internal command, assuming AC_ERR_OTHER\n");
- qc->err_mask |= AC_ERR_OTHER;
+ spin_unlock_irqrestore(&ap->host_set->lock, flags);
}
- /* finish up */
- spin_lock_irqsave(ap->lock, flags);
-
- *tf = qc->result_tf;
- err_mask = qc->err_mask;
+ return arg.err_mask;
+ issue_fail:
ata_qc_free(qc);
- ap->active_tag = preempted_tag;
- ap->sactive = preempted_sactive;
- ap->qc_active = preempted_qc_active;
-
- /* 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_DISABLED) {
- err_mask |= AC_ERR_SYSTEM;
- ata_port_probe(ap);
- }
-
- spin_unlock_irqrestore(ap->lock, flags);
-
- return err_mask;
-}
-
-/**
- * ata_do_simple_cmd - execute simple internal command
- * @dev: Device to which the command is sent
- * @cmd: Opcode to execute
- *
- * Execute a 'simple' command, that only consists of the opcode
- * 'cmd' itself, without filling any other registers
- *
- * LOCKING:
- * Kernel thread context (may sleep).
- *
- * RETURNS:
- * Zero on success, AC_ERR_* mask on failure
- */
-unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
-{
- struct ata_taskfile tf;
-
- ata_tf_init(dev, &tf);
-
- tf.command = cmd;
- tf.flags |= ATA_TFLAG_DEVICE;
- tf.protocol = ATA_PROT_NODATA;
-
- return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
+ spin_unlock_irqrestore(&ap->host_set->lock, flags);
+ return AC_ERR_OTHER;
}
/**
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_read_id - Read ID data from the specified device
- * @dev: target device
- * @p_class: pointer to class of the target device (may be changed)
- * @post_reset: is this read ID post-reset?
- * @id: buffer to read IDENTIFY data into
- *
- * 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.
+ * 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.
*
* LOCKING:
- * Kernel thread context (may sleep)
- *
- * RETURNS:
- * 0 on success, -errno otherwise.
+ * Inherited from caller. Some functions called by this function
+ * obtain the host_set lock.
*/
-int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
- int post_reset, u16 *id)
+
+static void ata_dev_identify(struct ata_port *ap, unsigned int device)
{
- struct ata_port *ap = dev->ap;
- unsigned int class = *p_class;
+ struct ata_device *dev = &ap->device[device];
+ unsigned int major_version;
+ u16 tmp;
+ unsigned long xfer_modes;
+ unsigned int using_edd;
struct ata_taskfile tf;
- unsigned int err_mask = 0;
- const char *reason;
+ unsigned int err_mask;
int rc;
- if (ata_msg_ctl(ap))
- ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER, host %u, dev %u\n",
- __FUNCTION__, ap->id, dev->devno);
+ 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);
- ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */
+ assert (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ATAPI ||
+ dev->class == ATA_DEV_NONE);
- retry:
- ata_tf_init(dev, &tf);
+ ata_dev_select(ap, device, 1, 1); /* select device 0/1 */
- switch (class) {
- case ATA_DEV_ATA:
+retry:
+ ata_tf_init(ap, &tf, device);
+
+ if (dev->class == ATA_DEV_ATA) {
tf.command = ATA_CMD_ID_ATA;
- break;
- case ATA_DEV_ATAPI:
+ DPRINTK("do ATA identify\n");
+ } else {
tf.command = ATA_CMD_ID_ATAPI;
- break;
- default:
- rc = -ENODEV;
- reason = "unsupported class";
- goto err_out;
+ DPRINTK("do ATAPI identify\n");
}
tf.protocol = ATA_PROT_PIO;
- err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE,
- id, sizeof(id[0]) * ATA_ID_WORDS);
+ err_mask = ata_exec_internal(ap, dev, &tf, DMA_FROM_DEVICE,
+ dev->id, sizeof(dev->id));
+
if (err_mask) {
- rc = -EIO;
- reason = "I/O error";
+ 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;
+ }
+ }
goto err_out;
}
- swap_buf_le16(id, ATA_ID_WORDS);
+ swap_buf_le16(dev->id, ATA_ID_WORDS);
- /* sanity check */
- rc = -EINVAL;
- reason = "device reports illegal type";
+ /* 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]);
- if (class == ATA_DEV_ATA) {
- if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
- goto err_out;
- } else {
- if (ata_id_is_ata(id))
- goto err_out;
+ /*
+ * common ATA, ATAPI feature tests
+ */
+
+ /* 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;
}
- if (post_reset && class == ATA_DEV_ATA) {
+ /* 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;
+
/*
* The exact sequence expected by certain pre-ATA4 drives is:
* SRST RESET
* anything else..
* Some drives were very specific about that exact sequence.
*/
- if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
- err_mask = ata_dev_init_params(dev, id[3], id[6]);
- if (err_mask) {
- rc = -EIO;
- reason = "INIT_DEV_PARAMS failed";
- goto err_out;
- }
+ if (major_version < 4 || (!ata_id_has_lba(dev->id))) {
+ ata_dev_init_params(ap, dev);
/* current CHS translation info (id[53-58]) might be
* changed. reread the identify device info.
*/
- post_reset = 0;
- goto retry;
+ ata_dev_reread_id(ap, dev);
}
- }
- *p_class = class;
+ if (ata_id_has_lba(dev->id)) {
+ dev->flags |= ATA_DFLAG_LBA;
- return 0;
+ if (ata_id_has_lba48(dev->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);
+ }
- err_out:
- if (ata_msg_warn(ap))
- ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY "
- "(%s, err_mask=0x%x)\n", reason, err_mask);
- return rc;
-}
+ /* 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 {
+ /* CHS */
-static inline u8 ata_dev_knobble(struct ata_device *dev)
-{
- return ((dev->ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
-}
+ /* 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;
-static void ata_dev_config_ncq(struct ata_device *dev,
- char *desc, size_t desc_sz)
-{
- struct ata_port *ap = dev->ap;
- int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
+ if (ata_id_current_chs_valid(dev->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);
+ }
- if (!ata_id_has_ncq(dev->id)) {
- desc[0] = '\0';
- return;
- }
+ /* 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 (ap->flags & ATA_FLAG_NCQ) {
- hdepth = min(ap->host->can_queue, ATA_MAX_QUEUE - 1);
- dev->flags |= ATA_DFLAG_NCQ;
- }
-
- if (hdepth >= ddepth)
- snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth);
- else
- snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth);
-}
-
-static void ata_set_port_max_cmd_len(struct ata_port *ap)
-{
- int i;
-
- if (ap->host) {
- 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);
- }
-}
-
-/**
- * ata_dev_configure - Configure the specified ATA/ATAPI device
- * @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
- */
-int ata_dev_configure(struct ata_device *dev, int print_info)
-{
- struct ata_port *ap = dev->ap;
- const u16 *id = dev->id;
- unsigned int xfer_mask;
- int rc;
-
- if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
- ata_dev_printk(dev, KERN_INFO,
- "%s: ENTER/EXIT (host %u, dev %u) -- nodev\n",
- __FUNCTION__, ap->id, dev->devno);
- return 0;
- }
-
- if (ata_msg_probe(ap))
- ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER, host %u, dev %u\n",
- __FUNCTION__, ap->id, dev->devno);
-
- /* print device capabilities */
- if (ata_msg_probe(ap))
- ata_dev_printk(dev, KERN_DEBUG,
- "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
- "85:%04x 86:%04x 87:%04x 88:%04x\n",
- __FUNCTION__,
- id[49], id[82], id[83], id[84],
- id[85], id[86], id[87], id[88]);
-
- /* initialize to-be-configured parameters */
- dev->flags &= ~ATA_DFLAG_CFG_MASK;
- 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);
-
- if (ata_msg_probe(ap))
- 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;
- char ncq_desc[20];
-
- lba_desc = "LBA";
- dev->flags |= ATA_DFLAG_LBA;
- if (ata_id_has_lba48(id)) {
- dev->flags |= ATA_DFLAG_LBA48;
- lba_desc = "LBA48";
- }
-
- /* config NCQ */
- ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
-
- /* print device info to dmesg */
- if (ata_msg_drv(ap) && print_info)
- ata_dev_printk(dev, KERN_INFO, "ATA-%d, "
- "max %s, %Lu sectors: %s %s\n",
- ata_id_major_version(id),
- ata_mode_string(xfer_mask),
- (unsigned long long)dev->n_sectors,
- lba_desc, ncq_desc);
- } else {
- /* CHS */
-
- /* Default translation */
- dev->cylinders = id[1];
- dev->heads = id[3];
- dev->sectors = id[6];
-
- if (ata_id_current_chs_valid(id)) {
- /* Current CHS translation is valid. */
- dev->cylinders = id[54];
- dev->heads = id[55];
- dev->sectors = id[56];
- }
-
- /* print device info to dmesg */
- if (ata_msg_drv(ap) && print_info)
- ata_dev_printk(dev, KERN_INFO, "ATA-%d, "
- "max %s, %Lu sectors: CHS %u/%u/%u\n",
- ata_id_major_version(id),
- ata_mode_string(xfer_mask),
- (unsigned long long)dev->n_sectors,
- dev->cylinders, dev->heads,
- dev->sectors);
- }
-
- if (dev->id[59] & 0x100) {
- dev->multi_count = dev->id[59] & 0xff;
- if (ata_msg_drv(ap) && print_info)
- ata_dev_printk(dev, KERN_INFO,
- "ata%u: dev %u multi count %u\n",
- ap->id, dev->devno, dev->multi_count);
- }
-
- dev->cdb_len = 16;
+ ap->host->max_cmd_len = 16;
}
/* ATAPI-specific feature tests */
else if (dev->class == ATA_DEV_ATAPI) {
- char *cdb_intr_string = "";
+ if (ata_id_is_ata(dev->id)) /* sanity check */
+ goto err_out_nosup;
- rc = atapi_cdb_len(id);
+ rc = atapi_cdb_len(dev->id);
if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
- if (ata_msg_warn(ap))
- ata_dev_printk(dev, KERN_WARNING,
- "unsupported CDB len\n");
- rc = -EINVAL;
+ printk(KERN_WARNING "ata%u: unsupported CDB len\n", ap->id);
goto err_out_nosup;
}
- dev->cdb_len = (unsigned int) rc;
-
- if (ata_id_cdb_intr(dev->id)) {
- dev->flags |= ATA_DFLAG_CDB_INTR;
- cdb_intr_string = ", CDB intr";
- }
+ ap->cdb_len = (unsigned int) rc;
+ ap->host->max_cmd_len = (unsigned char) ap->cdb_len;
/* print device info to dmesg */
- if (ata_msg_drv(ap) && print_info)
- ata_dev_printk(dev, KERN_INFO, "ATAPI, max %s%s\n",
- ata_mode_string(xfer_mask),
- cdb_intr_string);
+ printk(KERN_INFO "ata%u: dev %u ATAPI, max %s\n",
+ ap->id, device,
+ ata_mode_string(xfer_modes));
}
- ata_set_port_max_cmd_len(ap);
+ DPRINTK("EXIT, drv_stat = 0x%x\n", ata_chk_status(ap));
+ return;
+
+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(dev)) {
- if (ata_msg_drv(ap) && print_info)
- ata_dev_printk(dev, KERN_INFO,
- "applying bridge limits\n");
- dev->udma_mask &= ATA_UDMA5;
- dev->max_sectors = ATA_MAX_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, dev);
-
- if (ata_msg_probe(ap))
- ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n",
- __FUNCTION__, ata_chk_status(ap));
- return 0;
-
-err_out_nosup:
- if (ata_msg_probe(ap))
- ata_dev_printk(dev, KERN_DEBUG,
- "%s: EXIT, err\n", __FUNCTION__);
- return rc;
+ ap->ops->dev_config(ap, &ap->device[i]);
}
/**
* PCI/etc. bus probe sem.
*
* RETURNS:
- * Zero on success, negative errno otherwise.
+ * Zero on success, non-zero on error.
*/
static int ata_bus_probe(struct ata_port *ap)
{
- unsigned int classes[ATA_MAX_DEVICES];
- int tries[ATA_MAX_DEVICES];
- int i, rc, down_xfermask;
- struct ata_device *dev;
-
- ata_port_probe(ap);
+ unsigned int i, found = 0;
- for (i = 0; i < ATA_MAX_DEVICES; i++)
- tries[i] = ATA_PROBE_MAX_TRIES;
-
- retry:
- down_xfermask = 0;
-
- /* reset and determine device classes */
ap->ops->phy_reset(ap);
+ if (ap->flags & ATA_FLAG_PORT_DISABLED)
+ goto err_out;
for (i = 0; i < ATA_MAX_DEVICES; i++) {
- dev = &ap->device[i];
-
- if (!(ap->flags & ATA_FLAG_DISABLED) &&
- dev->class != ATA_DEV_UNKNOWN)
- classes[dev->devno] = dev->class;
- else
- classes[dev->devno] = ATA_DEV_NONE;
-
- dev->class = ATA_DEV_UNKNOWN;
+ ata_dev_identify(ap, i);
+ if (ata_dev_present(&ap->device[i])) {
+ found = 1;
+ ata_dev_config(ap,i);
+ }
}
- ata_port_probe(ap);
-
- /* after the reset the device state is PIO 0 and the controller
- state is undefined. Record the mode */
-
- for (i = 0; i < ATA_MAX_DEVICES; i++)
- ap->device[i].pio_mode = XFER_PIO_0;
-
- /* read IDENTIFY page and configure devices */
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- dev = &ap->device[i];
-
- if (tries[i])
- dev->class = classes[i];
-
- if (!ata_dev_enabled(dev))
- continue;
-
- rc = ata_dev_read_id(dev, &dev->class, 1, dev->id);
- if (rc)
- goto fail;
+ if ((!found) || (ap->flags & ATA_FLAG_PORT_DISABLED))
+ goto err_out_disable;
- rc = ata_dev_configure(dev, 1);
- if (rc)
- goto fail;
- }
-
- /* configure transfer mode */
- rc = ata_set_mode(ap, &dev);
- if (rc) {
- down_xfermask = 1;
- goto fail;
- }
+ ata_set_mode(ap);
+ if (ap->flags & ATA_FLAG_PORT_DISABLED)
+ goto err_out_disable;
- for (i = 0; i < ATA_MAX_DEVICES; i++)
- if (ata_dev_enabled(&ap->device[i]))
- return 0;
+ return 0;
- /* no device present, disable port */
- ata_port_disable(ap);
+err_out_disable:
ap->ops->port_disable(ap);
- return -ENODEV;
-
- fail:
- switch (rc) {
- case -EINVAL:
- case -ENODEV:
- tries[dev->devno] = 0;
- break;
- case -EIO:
- sata_down_spd_limit(ap);
- /* fall through */
- default:
- tries[dev->devno]--;
- if (down_xfermask &&
- ata_down_xfermask_limit(dev, tries[dev->devno] == 1))
- tries[dev->devno] = 0;
- }
-
- if (!tries[dev->devno]) {
- ata_down_xfermask_limit(dev, 1);
- ata_dev_disable(dev);
- }
-
- goto retry;
+err_out:
+ return -1;
}
/**
void ata_port_probe(struct ata_port *ap)
{
- ap->flags &= ~ATA_FLAG_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, scontrol, tmp;
-
- if (sata_scr_read(ap, SCR_STATUS, &sstatus))
- return;
- sata_scr_read(ap, SCR_CONTROL, &scontrol);
-
- if (ata_port_online(ap)) {
- tmp = (sstatus >> 4) & 0xf;
- ata_port_printk(ap, KERN_INFO,
- "SATA link up %s (SStatus %X SControl %X)\n",
- sata_spd_string(tmp), sstatus, scontrol);
- } else {
- ata_port_printk(ap, KERN_INFO,
- "SATA link down (SStatus %X SControl %X)\n",
- sstatus, scontrol);
- }
+ ap->flags &= ~ATA_FLAG_PORT_DISABLED;
}
/**
if (ap->flags & ATA_FLAG_SATA_RESET) {
/* issue phy wake/reset */
- sata_scr_write_flush(ap, SCR_CONTROL, 0x301);
+ 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. */
mdelay(1);
}
- /* phy wake/clear reset */
- sata_scr_write_flush(ap, SCR_CONTROL, 0x300);
+ scr_write_flush(ap, SCR_CONTROL, 0x300); /* phy wake/clear reset */
/* wait for phy to become ready, if necessary */
do {
msleep(200);
- sata_scr_read(ap, SCR_STATUS, &sstatus);
+ sstatus = scr_read(ap, SCR_STATUS);
if ((sstatus & 0xf) != 1)
break;
} while (time_before(jiffies, timeout));
- /* print link status */
- sata_print_link_status(ap);
-
/* TODO: phy layer with polling, timeouts, etc. */
- if (!ata_port_offline(ap))
+ sstatus = scr_read(ap, SCR_STATUS);
+ if (sata_dev_present(ap)) {
+ const char *speed;
+ u32 tmp;
+
+ 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);
ata_port_probe(ap);
- else
+ } else {
+ printk(KERN_INFO "ata%u: SATA link down (SStatus %X)\n",
+ ap->id, sstatus);
ata_port_disable(ap);
+ }
- if (ap->flags & ATA_FLAG_DISABLED)
+ if (ap->flags & ATA_FLAG_PORT_DISABLED)
return;
if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
void sata_phy_reset(struct ata_port *ap)
{
__sata_phy_reset(ap);
- if (ap->flags & ATA_FLAG_DISABLED)
+ if (ap->flags & ATA_FLAG_PORT_DISABLED)
return;
ata_bus_reset(ap);
}
-/**
- * ata_dev_pair - return other device on cable
- * @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_device *adev)
-{
- struct ata_port *ap = adev->ap;
- struct ata_device *pair = &ap->device[1 - adev->devno];
- if (!ata_dev_enabled(pair))
- return NULL;
- return pair;
-}
-
/**
* ata_port_disable - Disable port.
* @ap: Port to be disabled.
{
ap->device[0].class = ATA_DEV_NONE;
ap->device[1].class = ATA_DEV_NONE;
- ap->flags |= ATA_FLAG_DISABLED;
-}
-
-/**
- * sata_down_spd_limit - adjust SATA spd limit downward
- * @ap: Port to adjust SATA spd limit for
- *
- * Adjust SATA spd limit of @ap downward. Note that this
- * function only adjusts the limit. The change must be applied
- * using sata_set_spd().
- *
- * LOCKING:
- * Inherited from caller.
- *
- * RETURNS:
- * 0 on success, negative errno on failure
- */
-int sata_down_spd_limit(struct ata_port *ap)
-{
- u32 sstatus, spd, mask;
- int rc, highbit;
-
- rc = sata_scr_read(ap, SCR_STATUS, &sstatus);
- if (rc)
- return rc;
-
- mask = ap->sata_spd_limit;
- if (mask <= 1)
- return -EINVAL;
- highbit = fls(mask) - 1;
- mask &= ~(1 << highbit);
-
- spd = (sstatus >> 4) & 0xf;
- if (spd <= 1)
- return -EINVAL;
- spd--;
- mask &= (1 << spd) - 1;
- if (!mask)
- return -EINVAL;
-
- ap->sata_spd_limit = mask;
-
- ata_port_printk(ap, KERN_WARNING, "limiting SATA link speed to %s\n",
- sata_spd_string(fls(mask)));
-
- return 0;
-}
-
-static int __sata_set_spd_needed(struct ata_port *ap, u32 *scontrol)
-{
- u32 spd, limit;
-
- if (ap->sata_spd_limit == UINT_MAX)
- limit = 0;
- else
- limit = fls(ap->sata_spd_limit);
-
- spd = (*scontrol >> 4) & 0xf;
- *scontrol = (*scontrol & ~0xf0) | ((limit & 0xf) << 4);
-
- return spd != limit;
-}
-
-/**
- * sata_set_spd_needed - is SATA spd configuration needed
- * @ap: Port in question
- *
- * Test whether the spd limit in SControl matches
- * @ap->sata_spd_limit. This function is used to determine
- * whether hardreset is necessary to apply SATA spd
- * configuration.
- *
- * LOCKING:
- * Inherited from caller.
- *
- * RETURNS:
- * 1 if SATA spd configuration is needed, 0 otherwise.
- */
-int sata_set_spd_needed(struct ata_port *ap)
-{
- u32 scontrol;
-
- if (sata_scr_read(ap, SCR_CONTROL, &scontrol))
- return 0;
-
- return __sata_set_spd_needed(ap, &scontrol);
-}
-
-/**
- * sata_set_spd - set SATA spd according to spd limit
- * @ap: Port to set SATA spd for
- *
- * Set SATA spd of @ap according to sata_spd_limit.
- *
- * LOCKING:
- * Inherited from caller.
- *
- * RETURNS:
- * 0 if spd doesn't need to be changed, 1 if spd has been
- * changed. Negative errno if SCR registers are inaccessible.
- */
-int sata_set_spd(struct ata_port *ap)
-{
- u32 scontrol;
- int rc;
-
- if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
- return rc;
-
- if (!__sata_set_spd_needed(ap, &scontrol))
- return 0;
-
- if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
- return rc;
-
- return 1;
+ ap->flags |= ATA_FLAG_PORT_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) {
}
/*
- * Lengthen active & recovery time so that cycle time is correct.
+ * Lenghten active & recovery time so that cycle time is correct.
*/
if (t->act8b + t->rec8b < t->cyc8b) {
return 0;
}
-/**
- * ata_down_xfermask_limit - adjust dev xfer masks downward
- * @dev: Device to adjust xfer masks
- * @force_pio0: Force PIO0
- *
- * Adjust xfer masks of @dev downward. Note that this function
- * does not apply the change. Invoking ata_set_mode() afterwards
- * will apply the limit.
- *
- * LOCKING:
- * Inherited from caller.
- *
- * RETURNS:
- * 0 on success, negative errno on failure
- */
-int ata_down_xfermask_limit(struct ata_device *dev, int force_pio0)
+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)
{
- unsigned long xfer_mask;
- int highbit;
+ 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;
+}
- xfer_mask = ata_pack_xfermask(dev->pio_mask, dev->mwdma_mask,
- dev->udma_mask);
+static void ata_dev_set_mode(struct ata_port *ap, struct ata_device *dev)
+{
+ int ofs, idx;
+ u8 base;
- if (!xfer_mask)
- goto fail;
- /* don't gear down to MWDMA from UDMA, go directly to PIO */
- if (xfer_mask & ATA_MASK_UDMA)
- xfer_mask &= ~ATA_MASK_MWDMA;
+ if (!ata_dev_present(dev) || (ap->flags & ATA_FLAG_PORT_DISABLED))
+ return;
- highbit = fls(xfer_mask) - 1;
- xfer_mask &= ~(1 << highbit);
- if (force_pio0)
- xfer_mask &= 1 << ATA_SHIFT_PIO;
- if (!xfer_mask)
- goto fail;
+ if (dev->xfer_shift == ATA_SHIFT_PIO)
+ dev->flags |= ATA_DFLAG_PIO;
- ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
- &dev->udma_mask);
+ ata_dev_set_xfermode(ap, dev);
- ata_dev_printk(dev, KERN_WARNING, "limiting speed to %s\n",
- ata_mode_string(xfer_mask));
+ 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));
- return 0;
+ 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);
- fail:
- return -EINVAL;
+ printk(KERN_INFO "ata%u: dev %u configured for %s\n",
+ ap->id, dev->devno, xfer_mode_str[idx]);
}
-static int ata_dev_set_mode(struct ata_device *dev)
+static int ata_host_set_pio(struct ata_port *ap)
{
- unsigned int err_mask;
- int rc;
-
- dev->flags &= ~ATA_DFLAG_PIO;
- if (dev->xfer_shift == ATA_SHIFT_PIO)
- dev->flags |= ATA_DFLAG_PIO;
+ unsigned int mask;
+ int x, i;
+ u8 base, xfer_mode;
- err_mask = ata_dev_set_xfermode(dev);
- if (err_mask) {
- ata_dev_printk(dev, KERN_ERR, "failed to set xfermode "
- "(err_mask=0x%x)\n", err_mask);
- return -EIO;
+ 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;
}
- rc = ata_dev_revalidate(dev, 0);
- if (rc)
- return rc;
+ base = base_from_shift(ATA_SHIFT_PIO);
+ xfer_mode = base + x;
- DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
- dev->xfer_shift, (int)dev->xfer_mode);
+ DPRINTK("base 0x%x xfer_mode 0x%x mask 0x%x x %d\n",
+ (int)base, (int)xfer_mode, mask, x);
+
+ 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);
+ }
+ }
- ata_dev_printk(dev, KERN_INFO, "configured for %s\n",
- ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)));
return 0;
}
+static void ata_host_set_dma(struct ata_port *ap, u8 xfer_mode,
+ unsigned int xfer_shift)
+{
+ 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);
+ }
+ }
+}
+
/**
* ata_set_mode - Program timings and issue SET FEATURES - XFER
* @ap: port on which timings will be programmed
- * @r_failed_dev: out paramter for failed device
*
- * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
- * ata_set_mode() fails, pointer to the failing device is
- * returned in @r_failed_dev.
+ * Set ATA device disk transfer mode (PIO3, UDMA6, etc.).
*
* LOCKING:
* PCI/etc. bus probe sem.
*
- * RETURNS:
- * 0 on success, negative errno otherwise
*/
-int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
+static void ata_set_mode(struct ata_port *ap)
{
- struct ata_device *dev;
- int i, rc = 0, used_dma = 0, found = 0;
+ unsigned int xfer_shift;
+ u8 xfer_mode;
+ int rc;
- /* has private set_mode? */
- if (ap->ops->set_mode) {
- /* FIXME: make ->set_mode handle no device case and
- * return error code and failing device on failure.
- */
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- if (ata_dev_ready(&ap->device[i])) {
- ap->ops->set_mode(ap);
- break;
- }
- }
- return 0;
- }
-
- /* step 1: calculate xfer_mask */
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- unsigned int pio_mask, dma_mask;
-
- dev = &ap->device[i];
-
- if (!ata_dev_enabled(dev))
- continue;
-
- ata_dev_xfermask(dev);
-
- 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);
-
- found = 1;
- if (dev->dma_mode)
- used_dma = 1;
- }
- if (!found)
- goto out;
-
- /* step 2: always set host PIO timings */
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- dev = &ap->device[i];
- if (!ata_dev_enabled(dev))
- continue;
-
- if (!dev->pio_mode) {
- ata_dev_printk(dev, KERN_WARNING, "no PIO support\n");
- rc = -EINVAL;
- goto out;
- }
-
- dev->xfer_mode = dev->pio_mode;
- dev->xfer_shift = ATA_SHIFT_PIO;
- if (ap->ops->set_piomode)
- ap->ops->set_piomode(ap, dev);
- }
-
- /* step 3: set host DMA timings */
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- dev = &ap->device[i];
+ /* step 1: always set host PIO timings */
+ rc = ata_host_set_pio(ap);
+ if (rc)
+ goto err_out;
- if (!ata_dev_enabled(dev) || !dev->dma_mode)
- continue;
+ /* step 2: choose the best data xfer mode */
+ xfer_mode = xfer_shift = 0;
+ rc = ata_choose_xfer_mode(ap, &xfer_mode, &xfer_shift);
+ if (rc)
+ goto err_out;
- 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);
- }
+ /* 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 4: update devices' xfer mode */
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- dev = &ap->device[i];
-
- /* don't udpate suspended devices' xfer mode */
- if (!ata_dev_ready(dev))
- continue;
-
- rc = ata_dev_set_mode(dev);
- if (rc)
- goto out;
- }
+ ata_dev_set_mode(ap, &ap->device[0]);
+ ata_dev_set_mode(ap, &ap->device[1]);
- /* 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;
+ if (ap->flags & ATA_FLAG_PORT_DISABLED)
+ return;
- /* step5: chip specific finalisation */
if (ap->ops->post_set_mode)
ap->ops->post_set_mode(ap);
- out:
- if (rc)
- *r_failed_dev = dev;
- return rc;
-}
-
-/**
- * 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)
- */
+ return;
-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);
+err_out:
+ ata_port_disable(ap);
}
/**
* or a timeout occurs.
*
* LOCKING: None.
+ *
*/
-unsigned int ata_busy_sleep (struct ata_port *ap,
- unsigned long tmout_pat, unsigned long tmout)
+static unsigned int ata_busy_sleep (struct ata_port *ap,
+ unsigned long tmout_pat,
+ unsigned long tmout)
{
unsigned long timer_start, timeout;
u8 status;
}
if (status & ATA_BUSY)
- ata_port_printk(ap, KERN_WARNING,
- "port is slow to respond, please be patient\n");
+ printk(KERN_WARNING "ata%u is slow to respond, "
+ "please be patient\n", ap->id);
timeout = timer_start + tmout;
while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) {
}
if (status & ATA_BUSY) {
- ata_port_printk(ap, KERN_ERR, "port failed to respond "
- "(%lu secs)\n", tmout / HZ);
+ printk(KERN_ERR "ata%u failed to respond (%lu secs)\n",
+ ap->id, tmout / HZ);
return 1;
}
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);
- /* 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) {
- ata_port_printk(ap, KERN_ERR, "SRST failed (status 0xFF)\n");
- return AC_ERR_OTHER;
- }
-
ata_bus_post_reset(ap, devmask);
return 0;
* Obtains host_set lock.
*
* SIDE EFFECTS:
- * Sets ATA_FLAG_DISABLED if bus reset fails.
+ * 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;
+ unsigned int dev0, dev1 = 0, rc = 0, devmask = 0;
DPRINTK("ENTER, host %u, port %u\n", ap->id, ap->port_no);
/* issue bus reset */
if (ap->flags & ATA_FLAG_SRST)
- if (ata_bus_softreset(ap, devmask))
- goto err_out;
+ 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 (rc)
+ goto err_out;
/*
* determine by signature whether we have ATA or ATAPI devices
*/
- ap->device[0].class = ata_dev_try_classify(ap, 0, &err);
+ err = ata_dev_try_classify(ap, 0);
if ((slave_possible) && (err != 0x81))
- ap->device[1].class = ata_dev_try_classify(ap, 1, &err);
+ ata_dev_try_classify(ap, 1);
/* re-enable interrupts */
if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */
return;
err_out:
- ata_port_printk(ap, KERN_ERR, "disabling port\n");
+ printk(KERN_ERR "ata%u: disabling port\n", ap->id);
ap->ops->port_disable(ap);
DPRINTK("EXIT\n");
}
-/**
- * sata_phy_debounce - debounce SATA phy status
- * @ap: ATA port to debounce SATA phy status for
- * @params: timing parameters { interval, duratinon, timeout } in msec
- *
- * Make sure SStatus of @ap reaches stable state, determined by
- * holding the same value where DET is not 1 for @duration polled
- * every @interval, before @timeout. Timeout constraints the
- * beginning of the stable state. Because, after hot unplugging,
- * DET gets stuck at 1 on some controllers, this functions waits
- * until timeout then returns 0 if DET is stable at 1.
- *
- * LOCKING:
- * Kernel thread context (may sleep)
- *
- * RETURNS:
- * 0 on success, -errno on failure.
- */
-int sata_phy_debounce(struct ata_port *ap, const unsigned long *params)
+static void ata_pr_blacklisted(const struct ata_port *ap,
+ const struct ata_device *dev)
{
- unsigned long interval_msec = params[0];
- unsigned long duration = params[1] * HZ / 1000;
- unsigned long timeout = jiffies + params[2] * HZ / 1000;
- unsigned long last_jiffies;
- u32 last, cur;
- int rc;
-
- if ((rc = sata_scr_read(ap, SCR_STATUS, &cur)))
- return rc;
- cur &= 0xf;
-
- last = cur;
- last_jiffies = jiffies;
-
- while (1) {
- msleep(interval_msec);
- if ((rc = sata_scr_read(ap, SCR_STATUS, &cur)))
- return rc;
- cur &= 0xf;
-
- /* DET stable? */
- if (cur == last) {
- if (cur == 1 && time_before(jiffies, timeout))
- continue;
- if (time_after(jiffies, last_jiffies + duration))
- return 0;
- continue;
- }
-
- /* unstable, start over */
- last = cur;
- last_jiffies = jiffies;
-
- /* check timeout */
- if (time_after(jiffies, timeout))
- return -EBUSY;
- }
+ printk(KERN_WARNING "ata%u: dev %u is on DMA blacklist, disabling DMA\n",
+ ap->id, dev->devno);
}
-/**
- * sata_phy_resume - resume SATA phy
- * @ap: ATA port to resume SATA phy for
- * @params: timing parameters { interval, duratinon, timeout } in msec
- *
- * Resume SATA phy of @ap and debounce it.
- *
- * LOCKING:
- * Kernel thread context (may sleep)
- *
- * RETURNS:
- * 0 on success, -errno on failure.
- */
-int sata_phy_resume(struct ata_port *ap, const unsigned long *params)
-{
- u32 scontrol;
- int 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",
+};
- if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
- return rc;
+static int ata_dma_blacklisted(const struct ata_device *dev)
+{
+ unsigned char model_num[40];
+ char *s;
+ unsigned int len;
+ int i;
- scontrol = (scontrol & 0x0f0) | 0x300;
+ 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));
- if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
- return rc;
+ /* ATAPI specifies that empty space is blank-filled; remove blanks */
+ while ((len > 0) && (s[len - 1] == ' ')) {
+ len--;
+ s[len] = 0;
+ }
- /* Some PHYs react badly if SStatus is pounded immediately
- * after resuming. Delay 200ms before debouncing.
- */
- msleep(200);
+ for (i = 0; i < ARRAY_SIZE(ata_dma_blacklist); i++)
+ if (!strncmp(ata_dma_blacklist[i], s, len))
+ return 1;
- return sata_phy_debounce(ap, params);
+ return 0;
}
-static void ata_wait_spinup(struct ata_port *ap)
+static unsigned int ata_get_mode_mask(const struct ata_port *ap, int shift)
{
- struct ata_eh_context *ehc = &ap->eh_context;
- unsigned long end, secs;
- int rc;
+ const struct ata_device *master, *slave;
+ unsigned int mask;
- /* first, debounce phy if SATA */
- if (ap->cbl == ATA_CBL_SATA) {
- rc = sata_phy_debounce(ap, sata_deb_timing_hotplug);
+ master = &ap->device[0];
+ slave = &ap->device[1];
- /* if debounced successfully and offline, no need to wait */
- if ((rc == 0 || rc == -EOPNOTSUPP) && ata_port_offline(ap))
- return;
+ assert (ata_dev_present(master) || ata_dev_present(slave));
+
+ 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;
+ }
+ }
+ else {
+ mask = 0xffffffff; /* shut up compiler warning */
+ BUG();
}
- /* okay, let's give the drive time to spin up */
- end = ehc->i.hotplug_timestamp + ATA_SPINUP_WAIT * HZ / 1000;
- secs = ((end - jiffies) + HZ - 1) / HZ;
+ return mask;
+}
- if (time_after(jiffies, end))
- return;
+/* find greatest bit */
+static int fgb(u32 bitmap)
+{
+ unsigned int i;
+ int x = -1;
- if (secs > 5)
- ata_port_printk(ap, KERN_INFO, "waiting for device to spin up "
- "(%lu secs)\n", secs);
+ for (i = 0; i < 32; i++)
+ if (bitmap & (1 << i))
+ x = i;
- schedule_timeout_uninterruptible(end - jiffies);
+ return x;
}
/**
- * ata_std_prereset - prepare for reset
- * @ap: ATA port to be reset
+ * 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
*
- * @ap is about to be reset. Initialize it.
+ * Based on host and device capabilities, determine the
+ * maximum transfer mode that is amenable to all.
*
* LOCKING:
- * Kernel thread context (may sleep)
+ * PCI/etc. bus probe sem.
*
* RETURNS:
- * 0 on success, -errno otherwise.
+ * Zero on success, negative on error.
*/
-int ata_std_prereset(struct ata_port *ap)
-{
- struct ata_eh_context *ehc = &ap->eh_context;
- const unsigned long *timing = sata_ehc_deb_timing(ehc);
- int rc;
-
- /* handle link resume & hotplug spinup */
- if ((ehc->i.flags & ATA_EHI_RESUME_LINK) &&
- (ap->flags & ATA_FLAG_HRST_TO_RESUME))
- ehc->i.action |= ATA_EH_HARDRESET;
- if ((ehc->i.flags & ATA_EHI_HOTPLUGGED) &&
- (ap->flags & ATA_FLAG_SKIP_D2H_BSY))
- ata_wait_spinup(ap);
+static int ata_choose_xfer_mode(const struct ata_port *ap,
+ u8 *xfer_mode_out,
+ unsigned int *xfer_shift_out)
+{
+ unsigned int mask, shift;
+ int x, i;
- /* if we're about to do hardreset, nothing more to do */
- if (ehc->i.action & ATA_EH_HARDRESET)
- return 0;
+ for (i = 0; i < ARRAY_SIZE(xfer_mode_classes); i++) {
+ shift = xfer_mode_classes[i].shift;
+ mask = ata_get_mode_mask(ap, shift);
- /* if SATA, resume phy */
- if (ap->cbl == ATA_CBL_SATA) {
- rc = sata_phy_resume(ap, timing);
- if (rc && rc != -EOPNOTSUPP) {
- /* phy resume failed */
- ata_port_printk(ap, KERN_WARNING, "failed to resume "
- "link for reset (errno=%d)\n", rc);
- return rc;
+ x = fgb(mask);
+ if (x >= 0) {
+ *xfer_mode_out = xfer_mode_classes[i].base + x;
+ *xfer_shift_out = shift;
+ return 0;
}
}
- /* Wait for !BSY if the controller can wait for the first D2H
- * Reg FIS and we don't know that no device is attached.
- */
- if (!(ap->flags & ATA_FLAG_SKIP_D2H_BSY) && !ata_port_offline(ap))
- ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
-
- return 0;
+ return -1;
}
/**
- * ata_std_softreset - reset host port via ATA SRST
- * @ap: port to reset
- * @classes: resulting classes of attached devices
+ * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
+ * @ap: Port associated with device @dev
+ * @dev: Device to which command will be sent
*
- * Reset host port using ATA SRST.
+ * Issue SET FEATURES - XFER MODE command to device @dev
+ * on port @ap.
*
* LOCKING:
- * Kernel thread context (may sleep)
- *
- * RETURNS:
- * 0 on success, -errno otherwise.
+ * PCI/etc. bus probe sem.
*/
-int ata_std_softreset(struct ata_port *ap, 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 (ata_port_offline(ap)) {
- classes[0] = ATA_DEV_NONE;
- goto out;
- }
+static void ata_dev_set_xfermode(struct ata_port *ap, struct ata_device *dev)
+{
+ struct ata_taskfile tf;
- /* 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);
+ /* set up set-features taskfile */
+ DPRINTK("set features - xfer mode\n");
- /* select device 0 again */
- ap->ops->dev_select(ap, 0);
+ ata_tf_init(ap, &tf, dev->devno);
+ tf.command = ATA_CMD_SET_FEATURES;
+ tf.feature = SETFEATURES_XFER;
+ tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
+ tf.protocol = ATA_PROT_NODATA;
+ tf.nsect = dev->xfer_mode;
- /* issue bus reset */
- DPRINTK("about to softreset, devmask=%x\n", devmask);
- err_mask = ata_bus_softreset(ap, devmask);
- if (err_mask) {
- ata_port_printk(ap, KERN_ERR, "SRST failed (err_mask=0x%x)\n",
- err_mask);
- return -EIO;
+ 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);
}
- /* 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;
+ DPRINTK("EXIT\n");
}
/**
- * sata_std_hardreset - reset host port via SATA phy reset
- * @ap: port to reset
- * @class: resulting class of attached device
- *
- * SATA phy-reset host port using DET bits of SControl register.
+ * 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:
- * Kernel thread context (may sleep)
- *
- * RETURNS:
- * 0 on success, -errno otherwise.
*/
-int sata_std_hardreset(struct ata_port *ap, unsigned int *class)
-{
- struct ata_eh_context *ehc = &ap->eh_context;
- const unsigned long *timing = sata_ehc_deb_timing(ehc);
- u32 scontrol;
- int rc;
-
- DPRINTK("ENTER\n");
- if (sata_set_spd_needed(ap)) {
- /* SATA spec says nothing about how to reconfigure
- * spd. To be on the safe side, turn off phy during
- * reconfiguration. This works for at least ICH7 AHCI
- * and Sil3124.
- */
- if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
- return rc;
-
- scontrol = (scontrol & 0x0f0) | 0x304;
+static void ata_dev_reread_id(struct ata_port *ap, struct ata_device *dev)
+{
+ struct ata_taskfile tf;
- if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
- return rc;
+ ata_tf_init(ap, &tf, dev->devno);
- sata_set_spd(ap);
+ 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");
}
- /* issue phy wake/reset */
- if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
- return rc;
-
- scontrol = (scontrol & 0x0f0) | 0x301;
-
- if ((rc = sata_scr_write_flush(ap, SCR_CONTROL, scontrol)))
- return rc;
-
- /* 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, timing);
+ tf.flags |= ATA_TFLAG_DEVICE;
+ tf.protocol = ATA_PROT_PIO;
- /* TODO: phy layer with polling, timeouts, etc. */
- if (ata_port_offline(ap)) {
- *class = ATA_DEV_NONE;
- DPRINTK("EXIT, link offline\n");
- return 0;
- }
+ if (ata_exec_internal(ap, dev, &tf, DMA_FROM_DEVICE,
+ dev->id, sizeof(dev->id)))
+ goto err_out;
- if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
- ata_port_printk(ap, KERN_ERR,
- "COMRESET failed (device not ready)\n");
- return -EIO;
- }
+ swap_buf_le16(dev->id, ATA_ID_WORDS);
- ap->ops->dev_select(ap, 0); /* probably unnecessary */
+ ata_dump_id(dev);
- *class = ata_dev_try_classify(ap, 0, NULL);
+ DPRINTK("EXIT\n");
- DPRINTK("EXIT, class=%u\n", *class);
- return 0;
+ return;
+err_out:
+ printk(KERN_ERR "ata%u: failed to reread ID, disabled\n", ap->id);
+ ata_port_disable(ap);
}
/**
- * 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.
+ * ata_dev_init_params - Issue INIT DEV PARAMS command
+ * @ap: Port associated with device @dev
+ * @dev: Device to which command will be sent
*
* LOCKING:
- * Kernel thread context (may sleep)
*/
-void ata_std_postreset(struct ata_port *ap, unsigned int *classes)
+
+static void ata_dev_init_params(struct ata_port *ap, struct ata_device *dev)
{
- u32 serror;
-
- DPRINTK("ENTER\n");
-
- /* print link status */
- sata_print_link_status(ap);
-
- /* clear SError */
- if (sata_scr_read(ap, SCR_ERROR, &serror) == 0)
- sata_scr_write(ap, SCR_ERROR, serror);
-
- /* re-enable interrupts */
- if (!ap->ops->error_handler) {
- /* FIXME: hack. create a hook instead */
- if (ap->ioaddr.ctl_addr)
- 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_dev_same_device - Determine whether new ID matches configured device
- * @dev: device to compare against
- * @new_class: class of the new device
- * @new_id: IDENTIFY page of the new device
- *
- * Compare @new_class and @new_id against @dev and determine
- * whether @dev is the device indicated by @new_class and
- * @new_id.
- *
- * LOCKING:
- * None.
- *
- * RETURNS:
- * 1 if @dev matches @new_class and @new_id, 0 otherwise.
- */
-static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
- const u16 *new_id)
-{
- const u16 *old_id = dev->id;
- unsigned char model[2][41], serial[2][21];
- u64 new_n_sectors;
-
- if (dev->class != new_class) {
- ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n",
- dev->class, new_class);
- return 0;
- }
-
- 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);
-
- if (strcmp(model[0], model[1])) {
- ata_dev_printk(dev, KERN_INFO, "model number mismatch "
- "'%s' != '%s'\n", model[0], model[1]);
- return 0;
- }
-
- if (strcmp(serial[0], serial[1])) {
- ata_dev_printk(dev, KERN_INFO, "serial number mismatch "
- "'%s' != '%s'\n", serial[0], serial[1]);
- return 0;
- }
-
- if (dev->class == ATA_DEV_ATA && dev->n_sectors != new_n_sectors) {
- ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch "
- "%llu != %llu\n",
- (unsigned long long)dev->n_sectors,
- (unsigned long long)new_n_sectors);
- return 0;
- }
-
- return 1;
-}
-
-/**
- * ata_dev_revalidate - Revalidate ATA device
- * @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_device *dev, int post_reset)
-{
- unsigned int class = dev->class;
- u16 *id = (void *)dev->ap->sector_buf;
- int rc;
-
- if (!ata_dev_enabled(dev)) {
- rc = -ENODEV;
- goto fail;
- }
-
- /* read ID data */
- rc = ata_dev_read_id(dev, &class, post_reset, id);
- if (rc)
- goto fail;
-
- /* is the device still there? */
- if (!ata_dev_same_device(dev, class, id)) {
- rc = -ENODEV;
- goto fail;
- }
-
- memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
-
- /* configure device according to the new ID */
- rc = ata_dev_configure(dev, 0);
- if (rc == 0)
- return 0;
-
- fail:
- ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc);
- return rc;
-}
-
-static const char * const ata_dma_blacklist [] = {
- "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_strim(char *s, size_t len)
-{
- len = strnlen(s, len);
-
- /* ATAPI specifies that empty space is blank-filled; remove blanks */
- while ((len > 0) && (s[len - 1] == ' ')) {
- len--;
- s[len] = 0;
- }
- return len;
-}
-
-static int ata_dma_blacklisted(const struct ata_device *dev)
-{
- unsigned char model_num[40];
- unsigned char model_rev[16];
- unsigned int nlen, rlen;
- int i;
-
- /* We don't support polling DMA.
- * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
- * if the LLDD handles only interrupts in the HSM_ST_LAST state.
- */
- if ((dev->ap->flags & ATA_FLAG_PIO_POLLING) &&
- (dev->flags & ATA_DFLAG_CDB_INTR))
- return 1;
-
- 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;
- }
- }
- return 0;
-}
-
-/**
- * ata_dev_xfermask - Compute supported xfermask of the given device
- * @dev: Device to compute xfermask for
- *
- * 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...
- *
- * 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.
- *
- * LOCKING:
- * None.
- */
-static void ata_dev_xfermask(struct ata_device *dev)
-{
- struct ata_port *ap = dev->ap;
- struct ata_host_set *hs = ap->host_set;
- unsigned long xfer_mask;
- int i;
-
- xfer_mask = ata_pack_xfermask(ap->pio_mask,
- ap->mwdma_mask, ap->udma_mask);
-
- /* 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);
-
- /* 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_absent(d))
- continue;
-
- if (ata_dev_disabled(d)) {
- /* to avoid violating device selection timing */
- xfer_mask &= ata_pack_xfermask(d->pio_mask,
- UINT_MAX, UINT_MAX);
- 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);
- }
-
- if (ata_dma_blacklisted(dev))
- ata_dev_printk(dev, KERN_WARNING,
- "device is on DMA blacklist, disabling DMA\n");
-
- 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);
-}
-
-/**
- * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
- * @dev: Device to which command will be sent
- *
- * Issue SET FEATURES - XFER MODE command to device @dev
- * on port @ap.
- *
- * LOCKING:
- * PCI/etc. bus probe sem.
- *
- * RETURNS:
- * 0 on success, AC_ERR_* mask otherwise.
- */
-
-static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
-{
- struct ata_taskfile tf;
- unsigned int err_mask;
-
- /* set up set-features taskfile */
- DPRINTK("set features - xfer mode\n");
-
- ata_tf_init(dev, &tf);
- tf.command = ATA_CMD_SET_FEATURES;
- tf.feature = SETFEATURES_XFER;
- tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
- tf.protocol = ATA_PROT_NODATA;
- tf.nsect = dev->xfer_mode;
-
- err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
-
- DPRINTK("EXIT, err_mask=%x\n", err_mask);
- return err_mask;
-}
-
-/**
- * ata_dev_init_params - Issue INIT DEV PARAMS command
- * @dev: Device to which command will be sent
- * @heads: Number of heads (taskfile parameter)
- * @sectors: Number of sectors (taskfile parameter)
- *
- * LOCKING:
- * Kernel thread context (may sleep)
- *
- * RETURNS:
- * 0 on success, AC_ERR_* mask otherwise.
- */
-static unsigned int ata_dev_init_params(struct ata_device *dev,
- u16 heads, u16 sectors)
-{
- struct ata_taskfile tf;
- unsigned int err_mask;
+ struct ata_taskfile tf;
+ u16 sectors = dev->id[6];
+ u16 heads = dev->id[3];
/* Number of sectors per track 1-255. Number of heads 1-16 */
if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
- return AC_ERR_INVALID;
+ return;
/* set up init dev params taskfile */
DPRINTK("init dev params \n");
- ata_tf_init(dev, &tf);
+ ata_tf_init(ap, &tf, dev->devno);
tf.command = ATA_CMD_INIT_DEV_PARAMS;
tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
tf.protocol = ATA_PROT_NODATA;
tf.nsect = sectors;
tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
- err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
+ 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);
+ }
- DPRINTK("EXIT, err_mask=%x\n", err_mask);
- return err_mask;
+ DPRINTK("EXIT\n");
}
/**
int dir = qc->dma_dir;
void *pad_buf = NULL;
- WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP));
- WARN_ON(sg == NULL);
+ assert(qc->flags & ATA_QCFLAG_DMAMAP);
+ assert(sg != NULL);
if (qc->flags & ATA_QCFLAG_SINGLE)
- WARN_ON(qc->n_elem > 1);
+ assert(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->dev, sg, qc->n_elem, dir);
+ dma_unmap_sg(ap->host_set->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->dev,
+ dma_unmap_single(ap->host_set->dev,
sg_dma_address(&sg[0]), sg_dma_len(&sg[0]),
dir);
/* restore sg */
struct scatterlist *sg;
unsigned int idx;
- WARN_ON(qc->__sg == NULL);
- WARN_ON(qc->n_elem == 0 && qc->pad_len == 0);
+ assert(qc->__sg != NULL);
+ assert(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
qc->n_elem = 1;
qc->orig_n_elem = 1;
qc->buf_virt = buf;
- qc->nbytes = buflen;
sg = qc->__sg;
sg_init_one(sg, buf, buflen);
void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
struct scatterlist *psg = &qc->pad_sgent;
- WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
+ assert(qc->dev->class == ATA_DEV_ATAPI);
memset(pad_buf, 0, ATA_DMA_PAD_SZ);
goto skip_map;
}
- dma_address = dma_map_single(ap->dev, qc->buf_virt,
+ dma_address = dma_map_single(ap->host_set->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);
- WARN_ON(!(qc->flags & ATA_QCFLAG_SG));
+ assert(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;
- WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
+ assert(qc->dev->class == ATA_DEV_ATAPI);
memset(pad_buf, 0, ATA_DMA_PAD_SZ);
}
dir = qc->dma_dir;
- n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir);
+ n_elem = dma_map_sg(ap->host_set->dev, sg, pre_n_elem, dir);
if (n_elem < 1) {
/* restore last sg */
lsg->length += qc->pad_len;
}
/**
- * swap_buf_le16 - swap halves of 16-bit words in place
+ * ata_poll_qc_complete - turn irq back on and finish qc
+ * @qc: Command to complete
+ * @err_mask: ATA status register content
+ *
+ * LOCKING:
+ * None. (grabs host lock)
+ */
+
+void ata_poll_qc_complete(struct ata_queued_cmd *qc)
+{
+ struct ata_port *ap = qc->ap;
+ unsigned long flags;
+
+ spin_lock_irqsave(&ap->host_set->lock, flags);
+ ap->flags &= ~ATA_FLAG_NOINTR;
+ ata_irq_on(ap);
+ ata_qc_complete(qc);
+ spin_unlock_irqrestore(&ap->host_set->lock, flags);
+}
+
+/**
+ * ata_pio_poll -
+ * @ap: the target ata_port
+ *
+ * LOCKING:
+ * None. (executing in kernel thread context)
+ *
+ * RETURNS:
+ * timeout value to use
+ */
+
+static unsigned long ata_pio_poll(struct ata_port *ap)
+{
+ struct ata_queued_cmd *qc;
+ u8 status;
+ unsigned int poll_state = HSM_ST_UNKNOWN;
+ unsigned int reg_state = HSM_ST_UNKNOWN;
+
+ qc = ata_qc_from_tag(ap, ap->active_tag);
+ assert(qc != NULL);
+
+ switch (ap->hsm_task_state) {
+ case HSM_ST:
+ case HSM_ST_POLL:
+ poll_state = HSM_ST_POLL;
+ reg_state = HSM_ST;
+ break;
+ case HSM_ST_LAST:
+ case HSM_ST_LAST_POLL:
+ poll_state = HSM_ST_LAST_POLL;
+ reg_state = HSM_ST_LAST;
+ break;
+ default:
+ BUG();
+ break;
+ }
+
+ status = ata_chk_status(ap);
+ if (status & ATA_BUSY) {
+ if (time_after(jiffies, ap->pio_task_timeout)) {
+ qc->err_mask |= AC_ERR_ATA_BUS;
+ ap->hsm_task_state = HSM_ST_TMOUT;
+ return 0;
+ }
+ ap->hsm_task_state = poll_state;
+ return ATA_SHORT_PAUSE;
+ }
+
+ ap->hsm_task_state = reg_state;
+ return 0;
+}
+
+/**
+ * ata_pio_complete - check if drive is busy or idle
+ * @ap: the target ata_port
+ *
+ * LOCKING:
+ * None. (executing in kernel thread context)
+ *
+ * RETURNS:
+ * Non-zero if qc completed, zero otherwise.
+ */
+
+static int ata_pio_complete (struct ata_port *ap)
+{
+ struct ata_queued_cmd *qc;
+ u8 drv_stat;
+
+ /*
+ * This is purely heuristic. This is a fast path. Sometimes when
+ * we enter, BSY will be cleared in a chk-status or two. If not,
+ * the drive is probably seeking or something. Snooze for a couple
+ * msecs, then chk-status again. If still busy, fall back to
+ * HSM_ST_POLL state.
+ */
+ drv_stat = ata_busy_wait(ap, ATA_BUSY, 10);
+ if (drv_stat & ATA_BUSY) {
+ msleep(2);
+ drv_stat = ata_busy_wait(ap, ATA_BUSY, 10);
+ if (drv_stat & ATA_BUSY) {
+ ap->hsm_task_state = HSM_ST_LAST_POLL;
+ ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO;
+ return 0;
+ }
+ }
+
+ qc = ata_qc_from_tag(ap, ap->active_tag);
+ assert(qc != NULL);
+
+ drv_stat = ata_wait_idle(ap);
+ if (!ata_ok(drv_stat)) {
+ qc->err_mask |= __ac_err_mask(drv_stat);
+ ap->hsm_task_state = HSM_ST_ERR;
+ return 0;
+ }
+
+ ap->hsm_task_state = HSM_ST_IDLE;
+
+ assert(qc->err_mask == 0);
+ ata_poll_qc_complete(qc);
+
+ /* another command may start at this point */
+
+ return 1;
+}
+
+
+/**
+ * swap_buf_le16 - swap halves of 16-words in place
* @buf: Buffer to swap
* @buf_words: Number of 16-bit words in buffer.
*
/**
* ata_mmio_data_xfer - Transfer data by MMIO
- * @adev: device for this I/O
+ * @ap: port to read/write
* @buf: data buffer
* @buflen: buffer length
* @write_data: read/write
* Inherited from caller.
*/
-void ata_mmio_data_xfer(struct ata_device *adev, unsigned char *buf,
- unsigned int buflen, int write_data)
+static void ata_mmio_data_xfer(struct ata_port *ap, unsigned char *buf,
+ unsigned int buflen, int write_data)
{
- struct ata_port *ap = adev->ap;
unsigned int i;
unsigned int words = buflen >> 1;
u16 *buf16 = (u16 *) buf;
/**
* ata_pio_data_xfer - Transfer data by PIO
- * @adev: device to target
+ * @ap: port to read/write
* @buf: data buffer
* @buflen: buffer length
* @write_data: read/write
* Inherited from caller.
*/
-void ata_pio_data_xfer(struct ata_device *adev, unsigned char *buf,
- unsigned int buflen, int write_data)
+static void ata_pio_data_xfer(struct ata_port *ap, unsigned char *buf,
+ unsigned int buflen, int write_data)
{
- struct ata_port *ap = adev->ap;
unsigned int words = buflen >> 1;
/* Transfer multiple of 2 bytes */
}
/**
- * ata_pio_data_xfer_noirq - Transfer data by PIO
- * @adev: device to target
+ * ata_data_xfer - Transfer data from/to the data register.
+ * @ap: port to read/write
* @buf: data buffer
* @buflen: buffer length
- * @write_data: read/write
+ * @do_write: read/write
*
- * Transfer data from/to the device data register by PIO. Do the
- * transfer with interrupts disabled.
+ * Transfer data from/to the device data register.
*
* LOCKING:
* Inherited from caller.
*/
-void ata_pio_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
- unsigned int buflen, int write_data)
+static void ata_data_xfer(struct ata_port *ap, unsigned char *buf,
+ unsigned int buflen, int do_write)
{
- unsigned long flags;
- local_irq_save(flags);
- ata_pio_data_xfer(adev, buf, buflen, write_data);
- local_irq_restore(flags);
-}
-
-
-/**
- * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
- * @qc: Command on going
- *
- * Transfer ATA_SECT_SIZE of data from/to the ATA device.
+ /* Make the crap hardware pay the costs not the good stuff */
+ if (unlikely(ap->flags & ATA_FLAG_IRQ_MASK)) {
+ unsigned long flags;
+ local_irq_save(flags);
+ if (ap->flags & ATA_FLAG_MMIO)
+ ata_mmio_data_xfer(ap, buf, buflen, do_write);
+ else
+ ata_pio_data_xfer(ap, buf, buflen, do_write);
+ local_irq_restore(flags);
+ } else {
+ if (ap->flags & ATA_FLAG_MMIO)
+ ata_mmio_data_xfer(ap, buf, buflen, do_write);
+ else
+ ata_pio_data_xfer(ap, buf, buflen, do_write);
+ }
+}
+
+/**
+ * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
+ * @qc: Command on going
+ *
+ * Transfer ATA_SECT_SIZE of data from/to the ATA device.
*
* LOCKING:
* Inherited from caller.
page = nth_page(page, (offset >> PAGE_SHIFT));
offset %= PAGE_SIZE;
- DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
-
- if (PageHighMem(page)) {
- unsigned long flags;
-
- /* FIXME: use a bounce buffer */
- local_irq_save(flags);
- buf = kmap_atomic(page, KM_IRQ0);
-
- /* do the actual data transfer */
- ap->ops->data_xfer(qc->dev, buf + offset, ATA_SECT_SIZE, do_write);
-
- kunmap_atomic(buf, KM_IRQ0);
- local_irq_restore(flags);
- } else {
- buf = page_address(page);
- ap->ops->data_xfer(qc->dev, buf + offset, ATA_SECT_SIZE, do_write);
- }
+ buf = kmap(page) + offset;
qc->cursect++;
qc->cursg_ofs++;
qc->cursg++;
qc->cursg_ofs = 0;
}
-}
-
-/**
- * ata_pio_sectors - Transfer one or many 512-byte sectors.
- * @qc: Command on going
- *
- * Transfer one or many ATA_SECT_SIZE of data from/to the
- * ATA device for the DRQ request.
- *
- * LOCKING:
- * Inherited from caller.
- */
-
-static void ata_pio_sectors(struct ata_queued_cmd *qc)
-{
- if (is_multi_taskfile(&qc->tf)) {
- /* READ/WRITE MULTIPLE */
- unsigned int nsect;
-
- WARN_ON(qc->dev->multi_count == 0);
-
- nsect = min(qc->nsect - qc->cursect, qc->dev->multi_count);
- while (nsect--)
- ata_pio_sector(qc);
- } else
- ata_pio_sector(qc);
-}
-
-/**
- * atapi_send_cdb - Write CDB bytes to hardware
- * @ap: Port to which ATAPI device is attached.
- * @qc: Taskfile currently active
- *
- * When device has indicated its readiness to accept
- * a CDB, this function is called. Send the CDB.
- *
- * LOCKING:
- * caller.
- */
-static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc)
-{
- /* send SCSI cdb */
- DPRINTK("send cdb\n");
- WARN_ON(qc->dev->cdb_len < 12);
+ DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
- ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1);
- ata_altstatus(ap); /* flush */
+ /* do the actual data transfer */
+ do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
+ ata_data_xfer(ap, buf, ATA_SECT_SIZE, do_write);
- switch (qc->tf.protocol) {
- case ATA_PROT_ATAPI:
- ap->hsm_task_state = HSM_ST;
- break;
- case ATA_PROT_ATAPI_NODATA:
- ap->hsm_task_state = HSM_ST_LAST;
- break;
- case ATA_PROT_ATAPI_DMA:
- ap->hsm_task_state = HSM_ST_LAST;
- /* initiate bmdma */
- ap->ops->bmdma_start(qc);
- break;
- }
+ kunmap(page);
}
/**
unsigned int i;
if (words) /* warning if bytes > 1 */
- ata_dev_printk(qc->dev, KERN_WARNING,
- "%u bytes trailing data\n", bytes);
+ printk(KERN_WARNING "ata%u: %u bytes trailing data\n",
+ ap->id, bytes);
for (i = 0; i < words; i++)
- ap->ops->data_xfer(qc->dev, (unsigned char*)pad_buf, 2, do_write);
+ ata_data_xfer(ap, (unsigned char*)pad_buf, 2, do_write);
ap->hsm_task_state = HSM_ST_LAST;
return;
/* don't cross page boundaries */
count = min(count, (unsigned int)PAGE_SIZE - offset);
- DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
-
- if (PageHighMem(page)) {
- unsigned long flags;
-
- /* FIXME: use bounce buffer */
- local_irq_save(flags);
- buf = kmap_atomic(page, KM_IRQ0);
-
- /* do the actual data transfer */
- ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
-
- kunmap_atomic(buf, KM_IRQ0);
- local_irq_restore(flags);
- } else {
- buf = page_address(page);
- ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
- }
+ buf = kmap(page) + offset;
bytes -= count;
qc->curbytes += count;
qc->cursg_ofs = 0;
}
+ DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
+
+ /* do the actual data transfer */
+ ata_data_xfer(ap, buf, count, do_write);
+
+ kunmap(page);
+
if (bytes)
goto next_sg;
}
unsigned int ireason, bc_lo, bc_hi, bytes;
int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0;
- /* Abuse qc->result_tf for temp storage of intermediate TF
- * here to save some kernel stack usage.
- * For normal completion, qc->result_tf is not relevant. For
- * error, qc->result_tf is later overwritten by ata_qc_complete().
- * So, the correctness of qc->result_tf is not affected.
- */
- ap->ops->tf_read(ap, &qc->result_tf);
- ireason = qc->result_tf.nsect;
- bc_lo = qc->result_tf.lbam;
- bc_hi = qc->result_tf.lbah;
+ ap->ops->tf_read(ap, &qc->tf);
+ ireason = qc->tf.nsect;
+ bc_lo = qc->tf.lbam;
+ bc_hi = qc->tf.lbah;
bytes = (bc_hi << 8) | bc_lo;
/* shall be cleared to zero, indicating xfer of data */
if (do_write != i_write)
goto err_out;
- VPRINTK("ata%u: xfering %d bytes\n", ap->id, bytes);
-
__atapi_pio_bytes(qc, bytes);
return;
err_out:
- ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n");
- qc->err_mask |= AC_ERR_HSM;
+ printk(KERN_INFO "ata%u: dev %u: ATAPI check failed\n",
+ ap->id, dev->devno);
+ qc->err_mask |= AC_ERR_ATA_BUS;
ap->hsm_task_state = HSM_ST_ERR;
}
/**
- * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
+ * ata_pio_block - start PIO on a block
* @ap: the target ata_port
- * @qc: qc on going
*
- * RETURNS:
- * 1 if ok in workqueue, 0 otherwise.
+ * LOCKING:
+ * None. (executing in kernel thread context)
*/
-static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc)
+static void ata_pio_block(struct ata_port *ap)
{
- if (qc->tf.flags & ATA_TFLAG_POLLING)
- return 1;
-
- if (ap->hsm_task_state == HSM_ST_FIRST) {
- if (qc->tf.protocol == ATA_PROT_PIO &&
- (qc->tf.flags & ATA_TFLAG_WRITE))
- return 1;
+ struct ata_queued_cmd *qc;
+ u8 status;
- if (is_atapi_taskfile(&qc->tf) &&
- !(qc->dev->flags & ATA_DFLAG_CDB_INTR))
- return 1;
+ /*
+ * This is purely heuristic. This is a fast path.
+ * Sometimes when we enter, BSY will be cleared in
+ * a chk-status or two. If not, the drive is probably seeking
+ * or something. Snooze for a couple msecs, then
+ * chk-status again. If still busy, fall back to
+ * HSM_ST_POLL state.
+ */
+ status = ata_busy_wait(ap, ATA_BUSY, 5);
+ if (status & ATA_BUSY) {
+ msleep(2);
+ status = ata_busy_wait(ap, ATA_BUSY, 10);
+ if (status & ATA_BUSY) {
+ ap->hsm_task_state = HSM_ST_POLL;
+ ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO;
+ return;
+ }
}
- return 0;
-}
-
-/**
- * ata_hsm_qc_complete - finish a qc running on standard HSM
- * @qc: Command to complete
- * @in_wq: 1 if called from workqueue, 0 otherwise
- *
- * Finish @qc which is running on standard HSM.
- *
- * LOCKING:
- * If @in_wq is zero, spin_lock_irqsave(host_set lock).
- * Otherwise, none on entry and grabs host lock.
- */
-static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq)
-{
- struct ata_port *ap = qc->ap;
- unsigned long flags;
-
- if (ap->ops->error_handler) {
- if (in_wq) {
- spin_lock_irqsave(ap->lock, flags);
+ qc = ata_qc_from_tag(ap, ap->active_tag);
+ assert(qc != NULL);
- /* EH might have kicked in while host_set lock
- * is released.
- */
- qc = ata_qc_from_tag(ap, qc->tag);
- if (qc) {
- if (likely(!(qc->err_mask & AC_ERR_HSM))) {
- ata_irq_on(ap);
- ata_qc_complete(qc);
- } else
- ata_port_freeze(ap);
- }
+ /* check error */
+ if (status & (ATA_ERR | ATA_DF)) {
+ qc->err_mask |= AC_ERR_DEV;
+ ap->hsm_task_state = HSM_ST_ERR;
+ return;
+ }
- spin_unlock_irqrestore(ap->lock, flags);
- } else {
- if (likely(!(qc->err_mask & AC_ERR_HSM)))
- ata_qc_complete(qc);
- else
- ata_port_freeze(ap);
+ /* transfer data if any */
+ if (is_atapi_taskfile(&qc->tf)) {
+ /* DRQ=0 means no more data to transfer */
+ if ((status & ATA_DRQ) == 0) {
+ ap->hsm_task_state = HSM_ST_LAST;
+ return;
}
+
+ atapi_pio_bytes(qc);
} else {
- if (in_wq) {
- spin_lock_irqsave(ap->lock, flags);
- ata_irq_on(ap);
- ata_qc_complete(qc);
- spin_unlock_irqrestore(ap->lock, flags);
- } else
- ata_qc_complete(qc);
- }
+ /* handle BSY=0, DRQ=0 as error */
+ if ((status & ATA_DRQ) == 0) {
+ qc->err_mask |= AC_ERR_ATA_BUS;
+ ap->hsm_task_state = HSM_ST_ERR;
+ return;
+ }
- ata_altstatus(ap); /* flush */
+ ata_pio_sector(qc);
+ }
}
-/**
- * ata_hsm_move - move the HSM to the next state.
- * @ap: the target ata_port
- * @qc: qc on going
- * @status: current device status
- * @in_wq: 1 if called from workqueue, 0 otherwise
- *
- * RETURNS:
- * 1 when poll next status needed, 0 otherwise.
- */
-int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
- u8 status, int in_wq)
+static void ata_pio_error(struct ata_port *ap)
{
- unsigned long flags = 0;
- int poll_next;
-
- WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0);
-
- /* Make sure ata_qc_issue_prot() does not throw things
- * like DMA polling into the workqueue. Notice that
- * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
- */
- WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc));
-
-fsm_start:
- DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
- ap->id, qc->tf.protocol, ap->hsm_task_state, status);
-
- switch (ap->hsm_task_state) {
- case HSM_ST_FIRST:
- /* Send first data block or PACKET CDB */
+ struct ata_queued_cmd *qc;
- /* If polling, we will stay in the work queue after
- * sending the data. Otherwise, interrupt handler
- * takes over after sending the data.
- */
- poll_next = (qc->tf.flags & ATA_TFLAG_POLLING);
-
- /* check device status */
- if (unlikely((status & ATA_DRQ) == 0)) {
- /* handle BSY=0, DRQ=0 as error */
- if (likely(status & (ATA_ERR | ATA_DF)))
- /* device stops HSM for abort/error */
- qc->err_mask |= AC_ERR_DEV;
- else
- /* HSM violation. Let EH handle this */
- qc->err_mask |= AC_ERR_HSM;
+ qc = ata_qc_from_tag(ap, ap->active_tag);
+ assert(qc != NULL);
- ap->hsm_task_state = HSM_ST_ERR;
- goto fsm_start;
- }
+ if (qc->tf.command != ATA_CMD_PACKET)
+ printk(KERN_WARNING "ata%u: PIO error\n", ap->id);
- /* Device should not ask for data transfer (DRQ=1)
- * when it finds something wrong.
- * We ignore DRQ here and stop the HSM by
- * changing hsm_task_state to HSM_ST_ERR and
- * let the EH abort the command or reset the device.
- */
- if (unlikely(status & (ATA_ERR | ATA_DF))) {
- printk(KERN_WARNING "ata%d: DRQ=1 with device error, dev_stat 0x%X\n",
- ap->id, status);
- qc->err_mask |= AC_ERR_HSM;
- ap->hsm_task_state = HSM_ST_ERR;
- goto fsm_start;
- }
+ /* make sure qc->err_mask is available to
+ * know what's wrong and recover
+ */
+ assert(qc->err_mask);
- /* Send the CDB (atapi) or the first data block (ata pio out).
- * During the state transition, interrupt handler shouldn't
- * be invoked before the data transfer is complete and
- * hsm_task_state is changed. Hence, the following locking.
- */
- if (in_wq)
- spin_lock_irqsave(ap->lock, flags);
+ ap->hsm_task_state = HSM_ST_IDLE;
- if (qc->tf.protocol == ATA_PROT_PIO) {
- /* PIO data out protocol.
- * send first data block.
- */
+ ata_poll_qc_complete(qc);
+}
- /* ata_pio_sectors() might change the state
- * to HSM_ST_LAST. so, the state is changed here
- * before ata_pio_sectors().
- */
- ap->hsm_task_state = HSM_ST;
- ata_pio_sectors(qc);
- ata_altstatus(ap); /* flush */
- } else
- /* send CDB */
- atapi_send_cdb(ap, qc);
+static void ata_pio_task(void *_data)
+{
+ struct ata_port *ap = _data;
+ unsigned long timeout;
+ int qc_completed;
- if (in_wq)
- spin_unlock_irqrestore(ap->lock, flags);
+fsm_start:
+ timeout = 0;
+ qc_completed = 0;
- /* if polling, ata_pio_task() handles the rest.
- * otherwise, interrupt handler takes over from here.
- */
- break;
+ switch (ap->hsm_task_state) {
+ case HSM_ST_IDLE:
+ return;
case HSM_ST:
- /* complete command or read/write the data register */
- if (qc->tf.protocol == ATA_PROT_ATAPI) {
- /* ATAPI PIO protocol */
- if ((status & ATA_DRQ) == 0) {
- /* No more data to transfer or device error.
- * Device error will be tagged in HSM_ST_LAST.
- */
- ap->hsm_task_state = HSM_ST_LAST;
- goto fsm_start;
- }
+ ata_pio_block(ap);
+ break;
- /* Device should not ask for data transfer (DRQ=1)
- * when it finds something wrong.
- * We ignore DRQ here and stop the HSM by
- * changing hsm_task_state to HSM_ST_ERR and
- * let the EH abort the command or reset the device.
- */
- if (unlikely(status & (ATA_ERR | ATA_DF))) {
- printk(KERN_WARNING "ata%d: DRQ=1 with device error, dev_stat 0x%X\n",
- ap->id, status);
- qc->err_mask |= AC_ERR_HSM;
- ap->hsm_task_state = HSM_ST_ERR;
- goto fsm_start;
- }
+ case HSM_ST_LAST:
+ qc_completed = ata_pio_complete(ap);
+ break;
- atapi_pio_bytes(qc);
+ case HSM_ST_POLL:
+ case HSM_ST_LAST_POLL:
+ timeout = ata_pio_poll(ap);
+ break;
- if (unlikely(ap->hsm_task_state == HSM_ST_ERR))
- /* bad ireason reported by device */
- goto fsm_start;
+ case HSM_ST_TMOUT:
+ case HSM_ST_ERR:
+ ata_pio_error(ap);
+ return;
+ }
- } else {
- /* ATA PIO protocol */
- if (unlikely((status & ATA_DRQ) == 0)) {
- /* handle BSY=0, DRQ=0 as error */
- if (likely(status & (ATA_ERR | ATA_DF)))
- /* device stops HSM for abort/error */
- qc->err_mask |= AC_ERR_DEV;
- else
- /* HSM violation. Let EH handle this */
- qc->err_mask |= AC_ERR_HSM;
-
- ap->hsm_task_state = HSM_ST_ERR;
- goto fsm_start;
- }
+ if (timeout)
+ queue_delayed_work(ata_wq, &ap->pio_task, timeout);
+ else if (!qc_completed)
+ goto fsm_start;
+}
- /* For PIO reads, some devices may ask for
- * data transfer (DRQ=1) alone with ERR=1.
- * We respect DRQ here and transfer one
- * block of junk data before changing the
- * hsm_task_state to HSM_ST_ERR.
- *
- * For PIO writes, ERR=1 DRQ=1 doesn't make
- * sense since the data block has been
- * transferred to the device.
- */
- if (unlikely(status & (ATA_ERR | ATA_DF))) {
- /* data might be corrputed */
- qc->err_mask |= AC_ERR_DEV;
-
- if (!(qc->tf.flags & ATA_TFLAG_WRITE)) {
- ata_pio_sectors(qc);
- ata_altstatus(ap);
- status = ata_wait_idle(ap);
- }
-
- if (status & (ATA_BUSY | ATA_DRQ))
- qc->err_mask |= AC_ERR_HSM;
-
- /* ata_pio_sectors() might change the
- * state to HSM_ST_LAST. so, the state
- * is changed after ata_pio_sectors().
- */
- ap->hsm_task_state = HSM_ST_ERR;
- goto fsm_start;
- }
+/**
+ * ata_qc_timeout - Handle timeout of queued command
+ * @qc: Command that timed out
+ *
+ * Some part of the kernel (currently, only the SCSI layer)
+ * has noticed that the active command on port @ap has not
+ * completed after a specified length of time. Handle this
+ * condition by disabling DMA (if necessary) and completing
+ * transactions, with error if necessary.
+ *
+ * This also handles the case of the "lost interrupt", where
+ * for some reason (possibly hardware bug, possibly driver bug)
+ * an interrupt was not delivered to the driver, even though the
+ * transaction completed successfully.
+ *
+ * LOCKING:
+ * Inherited from SCSI layer (none, can sleep)
+ */
- ata_pio_sectors(qc);
+static void ata_qc_timeout(struct ata_queued_cmd *qc)
+{
+ struct ata_port *ap = qc->ap;
+ struct ata_host_set *host_set = ap->host_set;
+ u8 host_stat = 0, drv_stat;
+ unsigned long flags;
- if (ap->hsm_task_state == HSM_ST_LAST &&
- (!(qc->tf.flags & ATA_TFLAG_WRITE))) {
- /* all data read */
- ata_altstatus(ap);
- status = ata_wait_idle(ap);
- goto fsm_start;
- }
- }
+ DPRINTK("ENTER\n");
- ata_altstatus(ap); /* flush */
- poll_next = 1;
- break;
+ spin_lock_irqsave(&host_set->lock, flags);
- case HSM_ST_LAST:
- if (unlikely(!ata_ok(status))) {
- qc->err_mask |= __ac_err_mask(status);
- ap->hsm_task_state = HSM_ST_ERR;
- goto fsm_start;
- }
+ /* 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;
- /* no more data to transfer */
- DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
- ap->id, qc->dev->devno, status);
+ switch (qc->tf.protocol) {
- WARN_ON(qc->err_mask);
+ case ATA_PROT_DMA:
+ case ATA_PROT_ATAPI_DMA:
+ host_stat = ap->ops->bmdma_status(ap);
- ap->hsm_task_state = HSM_ST_IDLE;
+ /* before we do anything else, clear DMA-Start bit */
+ ap->ops->bmdma_stop(qc);
- /* complete taskfile transaction */
- ata_hsm_qc_complete(qc, in_wq);
+ /* fall through */
- poll_next = 0;
- break;
+ default:
+ ata_altstatus(ap);
+ drv_stat = ata_chk_status(ap);
- case HSM_ST_ERR:
- /* make sure qc->err_mask is available to
- * know what's wrong and recover
- */
- WARN_ON(qc->err_mask == 0);
+ /* ack bmdma irq events */
+ ap->ops->irq_clear(ap);
- ap->hsm_task_state = HSM_ST_IDLE;
+ printk(KERN_ERR "ata%u: command 0x%x timeout, stat 0x%x host_stat 0x%x\n",
+ ap->id, qc->tf.command, drv_stat, host_stat);
/* complete taskfile transaction */
- ata_hsm_qc_complete(qc, in_wq);
-
- poll_next = 0;
+ qc->err_mask |= ac_err_mask(drv_stat);
+ ata_qc_complete(qc);
break;
- default:
- poll_next = 0;
- BUG();
}
- return poll_next;
+ spin_unlock_irqrestore(&host_set->lock, flags);
+
+ DPRINTK("EXIT\n");
}
-static void ata_pio_task(void *_data)
+/**
+ * ata_eng_timeout - Handle timeout of queued command
+ * @ap: Port on which timed-out command is active
+ *
+ * Some part of the kernel (currently, only the SCSI layer)
+ * has noticed that the active command on port @ap has not
+ * completed after a specified length of time. Handle this
+ * condition by disabling DMA (if necessary) and completing
+ * transactions, with error if necessary.
+ *
+ * This also handles the case of the "lost interrupt", where
+ * for some reason (possibly hardware bug, possibly driver bug)
+ * an interrupt was not delivered to the driver, even though the
+ * transaction completed successfully.
+ *
+ * LOCKING:
+ * Inherited from SCSI layer (none, can sleep)
+ */
+
+void ata_eng_timeout(struct ata_port *ap)
{
- struct ata_queued_cmd *qc = _data;
- struct ata_port *ap = qc->ap;
- u8 status;
- int poll_next;
+ struct ata_queued_cmd *qc;
-fsm_start:
- WARN_ON(ap->hsm_task_state == HSM_ST_IDLE);
+ DPRINTK("ENTER\n");
- /*
- * This is purely heuristic. This is a fast path.
- * Sometimes when we enter, BSY will be cleared in
- * a chk-status or two. If not, the drive is probably seeking
- * or something. Snooze for a couple msecs, then
- * chk-status again. If still busy, queue delayed work.
- */
- status = ata_busy_wait(ap, ATA_BUSY, 5);
- if (status & ATA_BUSY) {
- msleep(2);
- status = ata_busy_wait(ap, ATA_BUSY, 10);
- if (status & ATA_BUSY) {
- ata_port_queue_task(ap, ata_pio_task, qc, ATA_SHORT_PAUSE);
- return;
- }
+ 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;
}
- /* move the HSM */
- poll_next = ata_hsm_move(ap, qc, status, 1);
-
- /* another command or interrupt handler
- * may be running at this point.
- */
- if (poll_next)
- goto fsm_start;
+out:
+ DPRINTK("EXIT\n");
}
/**
struct ata_queued_cmd *qc = NULL;
unsigned int i;
- /* no command while frozen */
- if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
- return NULL;
-
- /* the last tag is reserved for internal command. */
- for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
- if (!test_and_set_bit(i, &ap->qc_allocated)) {
- qc = __ata_qc_from_tag(ap, i);
+ for (i = 0; i < ATA_MAX_QUEUE; i++)
+ if (!test_and_set_bit(i, &ap->qactive)) {
+ qc = ata_qc_from_tag(ap, i);
break;
}
/**
* ata_qc_new_init - Request an available ATA command, and initialize it
+ * @ap: Port associated with device @dev
* @dev: Device from whom we request an available command structure
*
* LOCKING:
* None.
*/
-struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
+struct ata_queued_cmd *ata_qc_new_init(struct ata_port *ap,
+ struct ata_device *dev)
{
- struct ata_port *ap = dev->ap;
struct ata_queued_cmd *qc;
qc = ata_qc_new(ap);
return qc;
}
-/**
- * ata_qc_free - free unused ata_queued_cmd
- * @qc: Command to complete
- *
- * Designed to free unused ata_queued_cmd object
- * in case something prevents using it.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- */
-void ata_qc_free(struct ata_queued_cmd *qc)
+static void __ata_qc_complete(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
unsigned int tag;
- WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
-
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->qc_allocated);
+ clear_bit(tag, &ap->qactive);
}
}
-void __ata_qc_complete(struct ata_queued_cmd *qc)
-{
- struct ata_port *ap = qc->ap;
-
- 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);
-
- /* command should be marked inactive atomically with qc completion */
- if (qc->tf.protocol == ATA_PROT_NCQ)
- ap->sactive &= ~(1 << qc->tag);
- else
- ap->active_tag = ATA_TAG_POISON;
-
- /* atapi: mark qc as inactive to prevent the interrupt handler
- * from completing the command twice later, before the error handler
- * is called. (when rc != 0 and atapi request sense is needed)
- */
- qc->flags &= ~ATA_QCFLAG_ACTIVE;
- ap->qc_active &= ~(1 << qc->tag);
-
- /* call completion callback */
- qc->complete_fn(qc);
-}
-
/**
- * ata_qc_complete - Complete an active ATA command
+ * ata_qc_free - free unused ata_queued_cmd
* @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.
+ * Designed to free unused ata_queued_cmd object
+ * in case something prevents using it.
*
* LOCKING:
* spin_lock_irqsave(host_set lock)
*/
-void ata_qc_complete(struct ata_queued_cmd *qc)
+void ata_qc_free(struct ata_queued_cmd *qc)
{
- struct ata_port *ap = qc->ap;
-
- /* XXX: New EH and old EH use different mechanisms to
- * synchronize EH with regular execution path.
- *
- * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
- * Normal execution path is responsible for not accessing a
- * failed qc. libata core enforces the rule by returning NULL
- * from ata_qc_from_tag() for failed qcs.
- *
- * Old EH depends on ata_qc_complete() nullifying completion
- * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
- * not synchronize with interrupt handler. Only PIO task is
- * taken care of.
- */
- if (ap->ops->error_handler) {
- WARN_ON(ap->pflags & ATA_PFLAG_FROZEN);
-
- if (unlikely(qc->err_mask))
- qc->flags |= ATA_QCFLAG_FAILED;
-
- if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
- if (!ata_tag_internal(qc->tag)) {
- /* always fill result TF for failed qc */
- ap->ops->tf_read(ap, &qc->result_tf);
- ata_qc_schedule_eh(qc);
- return;
- }
- }
-
- /* read result TF if requested */
- if (qc->flags & ATA_QCFLAG_RESULT_TF)
- ap->ops->tf_read(ap, &qc->result_tf);
+ assert(qc != NULL); /* ata_qc_from_tag _might_ return NULL */
- __ata_qc_complete(qc);
- } else {
- if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
- return;
-
- /* read result TF if failed or requested */
- if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
- ap->ops->tf_read(ap, &qc->result_tf);
-
- __ata_qc_complete(qc);
- }
+ __ata_qc_complete(qc);
}
/**
- * ata_qc_complete_multiple - Complete multiple qcs successfully
- * @ap: port in question
- * @qc_active: new qc_active mask
- * @finish_qc: LLDD callback invoked before completing a qc
+ * ata_qc_complete - Complete an active ATA command
+ * @qc: Command to complete
+ * @err_mask: ATA Status register contents
*
- * Complete in-flight commands. This functions is meant to be
- * called from low-level driver's interrupt routine to complete
- * requests normally. ap->qc_active and @qc_active is compared
- * and commands are completed accordingly.
+ * 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)
- *
- * RETURNS:
- * Number of completed commands on success, -errno otherwise.
*/
-int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
- void (*finish_qc)(struct ata_queued_cmd *))
+
+void ata_qc_complete(struct ata_queued_cmd *qc)
{
- int nr_done = 0;
- u32 done_mask;
- int i;
+ int rc;
- done_mask = ap->qc_active ^ qc_active;
+ assert(qc != NULL); /* ata_qc_from_tag _might_ return NULL */
+ assert(qc->flags & ATA_QCFLAG_ACTIVE);
- if (unlikely(done_mask & qc_active)) {
- ata_port_printk(ap, KERN_ERR, "illegal qc_active transition "
- "(%08x->%08x)\n", ap->qc_active, qc_active);
- return -EINVAL;
- }
+ if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
+ ata_sg_clean(qc);
- for (i = 0; i < ATA_MAX_QUEUE; i++) {
- struct ata_queued_cmd *qc;
+ /* atapi: mark qc as inactive to prevent the interrupt handler
+ * from completing the command twice later, before the error handler
+ * is called. (when rc != 0 and atapi request sense is needed)
+ */
+ qc->flags &= ~ATA_QCFLAG_ACTIVE;
- if (!(done_mask & (1 << i)))
- continue;
+ /* call completion callback */
+ rc = qc->complete_fn(qc);
- if ((qc = ata_qc_from_tag(ap, i))) {
- if (finish_qc)
- finish_qc(qc);
- ata_qc_complete(qc);
- nr_done++;
- }
- }
+ /* if callback indicates not to complete command (non-zero),
+ * return immediately
+ */
+ if (rc != 0)
+ return;
- return nr_done;
+ __ata_qc_complete(qc);
+
+ VPRINTK("EXIT\n");
}
static inline int ata_should_dma_map(struct ata_queued_cmd *qc)
struct ata_port *ap = qc->ap;
switch (qc->tf.protocol) {
- case ATA_PROT_NCQ:
case ATA_PROT_DMA:
case ATA_PROT_ATAPI_DMA:
return 1;
case ATA_PROT_ATAPI:
case ATA_PROT_PIO:
+ case ATA_PROT_PIO_MULT:
if (ap->flags & ATA_FLAG_PIO_DMA)
return 1;
*
* LOCKING:
* spin_lock_irqsave(host_set lock)
+ *
+ * RETURNS:
+ * Zero on success, negative on error.
*/
-void ata_qc_issue(struct ata_queued_cmd *qc)
+
+int ata_qc_issue(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
- /* Make sure only one non-NCQ command is outstanding. The
- * check is skipped for old EH because it reuses active qc to
- * request ATAPI sense.
- */
- WARN_ON(ap->ops->error_handler && ata_tag_valid(ap->active_tag));
-
- if (qc->tf.protocol == ATA_PROT_NCQ) {
- WARN_ON(ap->sactive & (1 << qc->tag));
- ap->sactive |= 1 << qc->tag;
- } else {
- WARN_ON(ap->sactive);
- ap->active_tag = qc->tag;
- }
-
- qc->flags |= ATA_QCFLAG_ACTIVE;
- ap->qc_active |= 1 << qc->tag;
-
if (ata_should_dma_map(qc)) {
if (qc->flags & ATA_QCFLAG_SG) {
if (ata_sg_setup(qc))
- goto sg_err;
+ goto err_out;
} else if (qc->flags & ATA_QCFLAG_SINGLE) {
if (ata_sg_setup_one(qc))
- goto sg_err;
+ goto err_out;
}
} else {
qc->flags &= ~ATA_QCFLAG_DMAMAP;
ap->ops->qc_prep(qc);
- qc->err_mask |= ap->ops->qc_issue(qc);
- if (unlikely(qc->err_mask))
- goto err;
- return;
+ qc->ap->active_tag = qc->tag;
+ qc->flags |= ATA_QCFLAG_ACTIVE;
-sg_err:
- qc->flags &= ~ATA_QCFLAG_DMAMAP;
- qc->err_mask |= AC_ERR_SYSTEM;
-err:
- ata_qc_complete(qc);
+ 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
* spin_lock_irqsave(host_set lock)
*
* RETURNS:
- * Zero on success, AC_ERR_* mask on failure
+ * Zero on success, negative on error.
*/
-unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc)
+int ata_qc_issue_prot(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
- /* Use polling pio if the LLD doesn't handle
- * interrupt driven pio and atapi CDB interrupt.
- */
- if (ap->flags & ATA_FLAG_PIO_POLLING) {
- switch (qc->tf.protocol) {
- case ATA_PROT_PIO:
- case ATA_PROT_ATAPI:
- case ATA_PROT_ATAPI_NODATA:
- qc->tf.flags |= ATA_TFLAG_POLLING;
- break;
- case ATA_PROT_ATAPI_DMA:
- if (qc->dev->flags & ATA_DFLAG_CDB_INTR)
- /* see ata_dma_blacklisted() */
- BUG();
- break;
- default:
- break;
- }
- }
-
- /* select the device */
ata_dev_select(ap, qc->dev->devno, 1, 0);
- /* start the command */
switch (qc->tf.protocol) {
case ATA_PROT_NODATA:
- if (qc->tf.flags & ATA_TFLAG_POLLING)
- ata_qc_set_polling(qc);
-
ata_tf_to_host(ap, &qc->tf);
- ap->hsm_task_state = HSM_ST_LAST;
-
- if (qc->tf.flags & ATA_TFLAG_POLLING)
- ata_port_queue_task(ap, ata_pio_task, qc, 0);
-
break;
case ATA_PROT_DMA:
- WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
-
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 */
- ap->hsm_task_state = HSM_ST_LAST;
break;
- case ATA_PROT_PIO:
- if (qc->tf.flags & ATA_TFLAG_POLLING)
- ata_qc_set_polling(qc);
-
+ case ATA_PROT_PIO: /* load tf registers, initiate polling pio */
+ ata_qc_set_polling(qc);
ata_tf_to_host(ap, &qc->tf);
-
- if (qc->tf.flags & ATA_TFLAG_WRITE) {
- /* PIO data out protocol */
- ap->hsm_task_state = HSM_ST_FIRST;
- ata_port_queue_task(ap, ata_pio_task, qc, 0);
-
- /* always send first data block using
- * the ata_pio_task() codepath.
- */
- } else {
- /* PIO data in protocol */
- ap->hsm_task_state = HSM_ST;
-
- if (qc->tf.flags & ATA_TFLAG_POLLING)
- ata_port_queue_task(ap, ata_pio_task, qc, 0);
-
- /* if polling, ata_pio_task() handles the rest.
- * otherwise, interrupt handler takes over from here.
- */
- }
-
+ ap->hsm_task_state = HSM_ST;
+ queue_work(ata_wq, &ap->pio_task);
break;
case ATA_PROT_ATAPI:
- case ATA_PROT_ATAPI_NODATA:
- if (qc->tf.flags & ATA_TFLAG_POLLING)
- ata_qc_set_polling(qc);
-
+ ata_qc_set_polling(qc);
ata_tf_to_host(ap, &qc->tf);
+ queue_work(ata_wq, &ap->packet_task);
+ break;
- ap->hsm_task_state = HSM_ST_FIRST;
-
- /* send cdb by polling if no cdb interrupt */
- if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) ||
- (qc->tf.flags & ATA_TFLAG_POLLING))
- ata_port_queue_task(ap, ata_pio_task, qc, 0);
+ 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:
- WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
-
+ ap->flags |= ATA_FLAG_NOINTR;
ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
ap->ops->bmdma_setup(qc); /* set up bmdma */
- ap->hsm_task_state = HSM_ST_FIRST;
-
- /* send cdb by polling if no cdb interrupt */
- if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
- ata_port_queue_task(ap, ata_pio_task, qc, 0);
+ queue_work(ata_wq, &ap->packet_task);
break;
default:
WARN_ON(1);
- return AC_ERR_SYSTEM;
+ 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);
+}
+
+
+/**
+ * ata_bmdma_irq_clear - Clear PCI IDE BMDMA interrupt.
+ * @ap: Port associated with this ATA transaction.
+ *
+ * Clear interrupt and error flags in DMA status register.
+ *
+ * May be used as the irq_clear() entry in ata_port_operations.
+ *
+ * LOCKING:
+ * spin_lock_irqsave(host_set lock)
+ */
+
+void ata_bmdma_irq_clear(struct ata_port *ap)
+{
+ 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);
+ }
+
+}
+
+
+/**
+ * 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)
+ */
+
+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;
+}
+
+
+/**
+ * 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)
+ */
+
+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;
+
+ /* 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);
+ }
+
+ /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
+ ata_altstatus(ap); /* dummy read */
+}
+
/**
* ata_host_intr - Handle host interrupt for given (port, task)
* @ap: Port on which interrupt arrived (possibly...)
inline unsigned int ata_host_intr (struct ata_port *ap,
struct ata_queued_cmd *qc)
{
- u8 status, host_stat = 0;
+ u8 status, host_stat;
- VPRINTK("ata%u: protocol %d task_state %d\n",
- ap->id, qc->tf.protocol, ap->hsm_task_state);
+ switch (qc->tf.protocol) {
- /* Check whether we are expecting interrupt in this state */
- switch (ap->hsm_task_state) {
- case HSM_ST_FIRST:
- /* Some pre-ATAPI-4 devices assert INTRQ
- * at this state when ready to receive CDB.
- */
+ case ATA_PROT_DMA:
+ case ATA_PROT_ATAPI_DMA:
+ case ATA_PROT_ATAPI:
+ /* check status of DMA engine */
+ host_stat = ap->ops->bmdma_status(ap);
+ VPRINTK("ata%u: host_stat 0x%X\n", ap->id, host_stat);
- /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
- * The flag was turned on only for atapi devices.
- * No need to check is_atapi_taskfile(&qc->tf) again.
- */
- if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
+ /* if it's not our irq... */
+ if (!(host_stat & ATA_DMA_INTR))
goto idle_irq;
+
+ /* before we do anything else, clear DMA-Start bit */
+ ap->ops->bmdma_stop(qc);
+
+ /* fall through */
+
+ case ATA_PROT_ATAPI_NODATA:
+ case ATA_PROT_NODATA:
+ /* check altstatus */
+ status = ata_altstatus(ap);
+ if (status & ATA_BUSY)
+ goto idle_irq;
+
+ /* check main status, clearing INTRQ */
+ status = ata_chk_status(ap);
+ if (unlikely(status & ATA_BUSY))
+ goto idle_irq;
+ DPRINTK("ata%u: protocol %d (dev_stat 0x%X)\n",
+ ap->id, qc->tf.protocol, status);
+
+ /* ack bmdma irq events */
+ ap->ops->irq_clear(ap);
+
+ /* complete taskfile transaction */
+ qc->err_mask |= ac_err_mask(status);
+ ata_qc_complete(qc);
break;
- case HSM_ST_LAST:
- if (qc->tf.protocol == ATA_PROT_DMA ||
- qc->tf.protocol == ATA_PROT_ATAPI_DMA) {
- /* check status of DMA engine */
- host_stat = ap->ops->bmdma_status(ap);
- VPRINTK("ata%u: host_stat 0x%X\n", ap->id, host_stat);
-
- /* if it's not our irq... */
- if (!(host_stat & ATA_DMA_INTR))
- goto idle_irq;
-
- /* before we do anything else, clear DMA-Start bit */
- ap->ops->bmdma_stop(qc);
-
- if (unlikely(host_stat & ATA_DMA_ERR)) {
- /* error when transfering data to/from memory */
- qc->err_mask |= AC_ERR_HOST_BUS;
- ap->hsm_task_state = HSM_ST_ERR;
- }
- }
- break;
- case HSM_ST:
- break;
+
default:
goto idle_irq;
}
- /* check altstatus */
- status = ata_altstatus(ap);
- if (status & ATA_BUSY)
- goto idle_irq;
-
- /* check main status, clearing INTRQ */
- status = ata_chk_status(ap);
- if (unlikely(status & ATA_BUSY))
- goto idle_irq;
-
- /* ack bmdma irq events */
- ap->ops->irq_clear(ap);
-
- ata_hsm_move(ap, qc, status, 0);
return 1; /* irq handled */
idle_irq:
#ifdef ATA_IRQ_TRAP
if ((ap->stats.idle_irq % 1000) == 0) {
+ handled = 1;
ata_irq_ack(ap, 0); /* debug trap */
- ata_port_printk(ap, KERN_WARNING, "irq trap\n");
- return 1;
+ printk(KERN_WARNING "ata%d: irq trap\n", ap->id);
}
#endif
return 0; /* irq not handled */
ap = host_set->ports[i];
if (ap &&
- !(ap->flags & ATA_FLAG_DISABLED)) {
+ !(ap->flags & (ATA_FLAG_PORT_DISABLED | ATA_FLAG_NOINTR))) {
struct ata_queued_cmd *qc;
qc = ata_qc_from_tag(ap, ap->active_tag);
- if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) &&
+ if (qc && (!(qc->tf.ctl & ATA_NIEN)) &&
(qc->flags & ATA_QCFLAG_ACTIVE))
handled |= ata_host_intr(ap, qc);
}
}
/**
- * sata_scr_valid - test whether SCRs are accessible
- * @ap: ATA port to test SCR accessibility for
+ * atapi_packet_task - Write CDB bytes to hardware
+ * @_data: Port to which ATAPI device is attached.
*
- * Test whether SCRs are accessible for @ap.
+ * 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:
- * None.
- *
- * RETURNS:
- * 1 if SCRs are accessible, 0 otherwise.
+ * Kernel thread context (may sleep)
*/
-int sata_scr_valid(struct ata_port *ap)
-{
- return ap->cbl == ATA_CBL_SATA && ap->ops->scr_read;
-}
-/**
- * sata_scr_read - read SCR register of the specified port
- * @ap: ATA port to read SCR for
- * @reg: SCR to read
- * @val: Place to store read value
- *
- * Read SCR register @reg of @ap into *@val. This function is
- * guaranteed to succeed if the cable type of the port is SATA
- * and the port implements ->scr_read.
- *
- * LOCKING:
- * None.
- *
- * RETURNS:
- * 0 on success, negative errno on failure.
- */
-int sata_scr_read(struct ata_port *ap, int reg, u32 *val)
+static void atapi_packet_task(void *_data)
{
- if (sata_scr_valid(ap)) {
- *val = ap->ops->scr_read(ap, reg);
- return 0;
+ 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;
}
- return -EOPNOTSUPP;
-}
-/**
- * sata_scr_write - write SCR register of the specified port
- * @ap: ATA port to write SCR for
- * @reg: SCR to write
- * @val: value to write
- *
- * Write @val to SCR register @reg of @ap. This function is
- * guaranteed to succeed if the cable type of the port is SATA
- * and the port implements ->scr_read.
- *
- * LOCKING:
- * None.
- *
- * RETURNS:
- * 0 on success, negative errno on failure.
- */
-int sata_scr_write(struct ata_port *ap, int reg, u32 val)
-{
- if (sata_scr_valid(ap)) {
- ap->ops->scr_write(ap, reg, val);
- return 0;
+ /* 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;
}
- return -EOPNOTSUPP;
-}
-/**
- * sata_scr_write_flush - write SCR register of the specified port and flush
- * @ap: ATA port to write SCR for
- * @reg: SCR to write
- * @val: value to write
- *
- * This function is identical to sata_scr_write() except that this
- * function performs flush after writing to the register.
- *
- * LOCKING:
- * None.
- *
- * RETURNS:
- * 0 on success, negative errno on failure.
- */
-int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val)
-{
- if (sata_scr_valid(ap)) {
- ap->ops->scr_write(ap, reg, val);
- ap->ops->scr_read(ap, reg);
- return 0;
+ /* 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 -EOPNOTSUPP;
-}
-/**
- * ata_port_online - test whether the given port is online
- * @ap: ATA port to test
- *
- * Test whether @ap is online. Note that this function returns 0
- * if online status of @ap cannot be obtained, so
- * ata_port_online(ap) != !ata_port_offline(ap).
- *
- * LOCKING:
- * None.
- *
- * RETURNS:
- * 1 if the port online status is available and online.
- */
-int ata_port_online(struct ata_port *ap)
-{
- u32 sstatus;
+ return;
- if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) == 0x3)
- return 1;
- return 0;
+err_out:
+ ata_poll_qc_complete(qc);
}
+
/**
- * ata_port_offline - test whether the given port is offline
- * @ap: ATA port to test
+ * ata_port_start - Set port up for dma.
+ * @ap: Port to initialize
*
- * Test whether @ap is offline. Note that this function returns
- * 0 if offline status of @ap cannot be obtained, so
- * ata_port_online(ap) != !ata_port_offline(ap).
+ * Called just after data structures for each port are
+ * initialized. Allocates space for PRD table.
*
- * LOCKING:
- * None.
+ * May be used as the port_start() entry in ata_port_operations.
*
- * RETURNS:
- * 1 if the port offline status is available and offline.
+ * LOCKING:
+ * Inherited from caller.
*/
-int ata_port_offline(struct ata_port *ap)
+
+/*
+ * Execute a 'simple' command, that only consists of the opcode 'cmd' itself,
+ * without filling any other registers
+ */
+static int ata_do_simple_cmd(struct ata_port *ap, struct ata_device *dev,
+ u8 cmd)
{
- u32 sstatus;
+ struct ata_taskfile tf;
+ int err;
- if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) != 0x3)
- return 1;
- return 0;
+ ata_tf_init(ap, &tf, dev->devno);
+
+ tf.command = cmd;
+ tf.flags |= ATA_TFLAG_DEVICE;
+ tf.protocol = ATA_PROT_NODATA;
+
+ err = ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0);
+ if (err)
+ printk(KERN_ERR "%s: ata command failed: %d\n",
+ __FUNCTION__, err);
+
+ return err;
}
-int ata_flush_cache(struct ata_device *dev)
+static int ata_flush_cache(struct ata_port *ap, struct ata_device *dev)
{
- unsigned int err_mask;
u8 cmd;
if (!ata_try_flush_cache(dev))
if (ata_id_has_flush_ext(dev->id))
cmd = ATA_CMD_FLUSH_EXT;
- else
- cmd = ATA_CMD_FLUSH;
-
- err_mask = ata_do_simple_cmd(dev, cmd);
- if (err_mask) {
- ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n");
- return -EIO;
- }
-
- return 0;
-}
-
-static int ata_host_set_request_pm(struct ata_host_set *host_set,
- pm_message_t mesg, unsigned int action,
- unsigned int ehi_flags, int wait)
-{
- unsigned long flags;
- int i, rc;
-
- for (i = 0; i < host_set->n_ports; i++) {
- struct ata_port *ap = host_set->ports[i];
-
- /* Previous resume operation might still be in
- * progress. Wait for PM_PENDING to clear.
- */
- if (ap->pflags & ATA_PFLAG_PM_PENDING) {
- ata_port_wait_eh(ap);
- WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
- }
-
- /* request PM ops to EH */
- spin_lock_irqsave(ap->lock, flags);
-
- ap->pm_mesg = mesg;
- if (wait) {
- rc = 0;
- ap->pm_result = &rc;
- }
-
- ap->pflags |= ATA_PFLAG_PM_PENDING;
- ap->eh_info.action |= action;
- ap->eh_info.flags |= ehi_flags;
-
- ata_port_schedule_eh(ap);
+ else
+ cmd = ATA_CMD_FLUSH;
- spin_unlock_irqrestore(ap->lock, flags);
+ return ata_do_simple_cmd(ap, dev, cmd);
+}
- /* wait and check result */
- if (wait) {
- ata_port_wait_eh(ap);
- WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
- if (rc)
- return rc;
- }
- }
+static int ata_standby_drive(struct ata_port *ap, struct ata_device *dev)
+{
+ return ata_do_simple_cmd(ap, dev, ATA_CMD_STANDBYNOW1);
+}
- return 0;
+static int ata_start_drive(struct ata_port *ap, struct ata_device *dev)
+{
+ return ata_do_simple_cmd(ap, dev, ATA_CMD_IDLEIMMEDIATE);
}
/**
- * ata_host_set_suspend - suspend host_set
- * @host_set: host_set to suspend
- * @mesg: PM message
- *
- * Suspend @host_set. Actual operation is performed by EH. This
- * function requests EH to perform PM operations and waits for EH
- * to finish.
+ * ata_device_resume - wakeup a previously suspended devices
*
- * LOCKING:
- * Kernel thread context (may sleep).
+ * Kick the drive back into action, by sending it an idle immediate
+ * command and making sure its transfer mode matches between drive
+ * and host.
*
- * RETURNS:
- * 0 on success, -errno on failure.
*/
-int ata_host_set_suspend(struct ata_host_set *host_set, pm_message_t mesg)
+int ata_device_resume(struct ata_port *ap, struct ata_device *dev)
{
- int i, j, rc;
-
- rc = ata_host_set_request_pm(host_set, mesg, 0, ATA_EHI_QUIET, 1);
- if (rc)
- goto fail;
-
- /* EH is quiescent now. Fail if we have any ready device.
- * This happens if hotplug occurs between completion of device
- * suspension and here.
- */
- for (i = 0; i < host_set->n_ports; i++) {
- struct ata_port *ap = host_set->ports[i];
-
- for (j = 0; j < ATA_MAX_DEVICES; j++) {
- struct ata_device *dev = &ap->device[j];
-
- if (ata_dev_ready(dev)) {
- ata_port_printk(ap, KERN_WARNING,
- "suspend failed, device %d "
- "still active\n", dev->devno);
- rc = -EBUSY;
- goto fail;
- }
- }
+ if (ap->flags & ATA_FLAG_SUSPENDED) {
+ ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 200000);
+ ap->flags &= ~ATA_FLAG_SUSPENDED;
+ ata_set_mode(ap);
}
+ if (!ata_dev_present(dev))
+ return 0;
+ if (dev->class == ATA_DEV_ATA)
+ ata_start_drive(ap, dev);
- host_set->dev->power.power_state = mesg;
return 0;
-
- fail:
- ata_host_set_resume(host_set);
- return rc;
}
/**
- * ata_host_set_resume - resume host_set
- * @host_set: host_set to resume
+ * ata_device_suspend - prepare a device for suspend
*
- * Resume @host_set. Actual operation is performed by EH. This
- * function requests EH to perform PM operations and returns.
- * Note that all resume operations are performed parallely.
+ * Flush the cache on the drive, if appropriate, then issue a
+ * standbynow command.
*
- * LOCKING:
- * Kernel thread context (may sleep).
*/
-void ata_host_set_resume(struct ata_host_set *host_set)
+int ata_device_suspend(struct ata_port *ap, struct ata_device *dev)
{
- ata_host_set_request_pm(host_set, PMSG_ON, ATA_EH_SOFTRESET,
- ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0);
- host_set->dev->power.power_state = PMSG_ON;
-}
+ if (!ata_dev_present(dev))
+ return 0;
+ if (dev->class == ATA_DEV_ATA)
+ ata_flush_cache(ap, dev);
-/**
- * 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.
- */
+ ata_standby_drive(ap, dev);
+ ap->flags |= ATA_FLAG_SUSPENDED;
+ return 0;
+}
int ata_port_start (struct ata_port *ap)
{
- struct device *dev = ap->dev;
+ struct device *dev = ap->host_set->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->dev;
+ struct device *dev = ap->host_set->dev;
dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);
ata_pad_free(ap, dev);
iounmap(host_set->mmio_base);
}
+
/**
- * ata_dev_init - Initialize an ata_device structure
- * @dev: Device structure to initialize
- *
- * Initialize @dev in preparation for probing.
+ * ata_host_remove - Unregister SCSI host structure with upper layers
+ * @ap: Port to unregister
+ * @do_unregister: 1 if we fully unregister, 0 to just stop the port
*
* LOCKING:
* Inherited from caller.
*/
-void ata_dev_init(struct ata_device *dev)
+
+static void ata_host_remove(struct ata_port *ap, unsigned int do_unregister)
{
- struct ata_port *ap = dev->ap;
- unsigned long flags;
+ struct Scsi_Host *sh = ap->host;
- /* SATA spd limit is bound to the first device */
- ap->sata_spd_limit = ap->hw_sata_spd_limit;
+ DPRINTK("ENTER\n");
- /* High bits of dev->flags are used to record warm plug
- * requests which occur asynchronously. Synchronize using
- * host_set lock.
- */
- spin_lock_irqsave(ap->lock, flags);
- dev->flags &= ~ATA_DFLAG_INIT_MASK;
- spin_unlock_irqrestore(ap->lock, flags);
+ if (do_unregister)
+ scsi_remove_host(sh);
- memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0,
- sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET);
- dev->pio_mask = UINT_MAX;
- dev->mwdma_mask = UINT_MAX;
- dev->udma_mask = UINT_MAX;
+ ap->ops->port_stop(ap);
}
/**
* LOCKING:
* Inherited from caller.
*/
+
static void ata_host_init(struct ata_port *ap, struct Scsi_Host *host,
struct ata_host_set *host_set,
const struct ata_probe_ent *ent, unsigned int port_no)
host->unique_id = ata_unique_id++;
host->max_cmd_len = 12;
- ap->lock = &host_set->lock;
- ap->flags = ATA_FLAG_DISABLED;
+ ap->flags = ATA_FLAG_PORT_DISABLED;
ap->id = host->unique_id;
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->mwdma_mask = ent->mwdma_mask;
ap->udma_mask = ent->udma_mask;
ap->flags |= ent->host_flags;
- ap->flags |= ent->port_flags[port_no]; /* pata fix */
ap->ops = ent->port_ops;
- ap->hw_sata_spd_limit = UINT_MAX;
+ ap->cbl = ATA_CBL_NONE;
ap->active_tag = ATA_TAG_POISON;
ap->last_ctl = 0xFF;
-#if defined(ATA_VERBOSE_DEBUG)
- /* turn on all debugging levels */
- ap->msg_enable = 0x00FF;
-#elif defined(ATA_DEBUG)
- ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR;
-#else
- ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
-#endif
-
- INIT_WORK(&ap->port_task, NULL, NULL);
- INIT_WORK(&ap->hotplug_task, ata_scsi_hotplug, ap);
- INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan, ap);
- INIT_LIST_HEAD(&ap->eh_done_q);
- init_waitqueue_head(&ap->eh_wait_q);
-
- /* set cable type */
- ap->cbl = ATA_CBL_NONE;
- if (ap->flags & ATA_FLAG_SATA)
- ap->cbl = ATA_CBL_SATA;
+ INIT_WORK(&ap->packet_task, atapi_packet_task, ap);
+ INIT_WORK(&ap->pio_task, ata_pio_task, ap);
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- struct ata_device *dev = &ap->device[i];
- dev->ap = ap;
- dev->devno = i;
- ata_dev_init(dev);
- }
+ for (i = 0; i < ATA_MAX_DEVICES; i++)
+ ap->device[i].devno = i;
#ifdef ATA_IRQ_TRAP
ap->stats.unhandled_irq = 1;
int rc;
DPRINTK("ENTER\n");
-
- if (!ent->port_ops->error_handler &&
- !(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 = ata_shost_to_port(host);
+ ap = (struct ata_port *) &host->hostdata[0];
ata_host_init(ap, host, host_set, ent, port_no);
* RETURNS:
* Number of ports registered. Zero on error (no ports registered).
*/
+
int ata_device_add(const struct ata_probe_ent *ent)
{
unsigned int count = 0, i;
struct device *dev = ent->dev;
struct ata_host_set *host_set;
- int rc;
DPRINTK("ENTER\n");
/* alloc a container for our list of ATA ports (buses) */
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->pio_mask << ATA_SHIFT_PIO);
/* print per-port info to dmesg */
- ata_port_printk(ap, KERN_INFO, "%cATA max %s cmd 0x%lX "
- "ctl 0x%lX bmdma 0x%lX irq %lu\n",
- ap->flags & ATA_FLAG_SATA ? 'S' : 'P',
- ata_mode_string(xfer_mode_mask),
- ap->ioaddr.cmd_addr,
- ap->ioaddr.ctl_addr,
- ap->ioaddr.bmdma_addr,
- ent->irq);
+ printk(KERN_INFO "ata%u: %cATA max %s cmd 0x%lX ctl 0x%lX "
+ "bmdma 0x%lX irq %lu\n",
+ ap->id,
+ ap->flags & ATA_FLAG_SATA ? 'S' : 'P',
+ ata_mode_string(xfer_mode_mask),
+ ap->ioaddr.cmd_addr,
+ ap->ioaddr.ctl_addr,
+ ap->ioaddr.bmdma_addr,
+ ent->irq);
ata_chk_status(ap);
host_set->ops->irq_clear(ap);
- ata_eh_freeze_port(ap); /* freeze port before requesting IRQ */
count++;
}
goto err_free_ret;
/* obtain irq, that is shared between channels */
- rc = request_irq(ent->irq, ent->port_ops->irq_handler, ent->irq_flags,
- DRV_NAME, host_set);
- if (rc) {
- dev_printk(KERN_ERR, dev, "irq %lu request failed: %d\n",
- ent->irq, rc);
+ if (request_irq(ent->irq, ent->port_ops->irq_handler, ent->irq_flags,
+ DRV_NAME, host_set))
goto err_out;
- }
/* perform each probe synchronously */
DPRINTK("probe begin\n");
for (i = 0; i < count; i++) {
struct ata_port *ap;
- u32 scontrol;
int rc;
ap = host_set->ports[i];
- /* init sata_spd_limit to the current value */
- if (sata_scr_read(ap, SCR_CONTROL, &scontrol) == 0) {
- int spd = (scontrol >> 4) & 0xf;
- ap->hw_sata_spd_limit &= (1 << spd) - 1;
+ DPRINTK("ata%u: probe begin\n", ap->id);
+ rc = ata_bus_probe(ap);
+ DPRINTK("ata%u: probe end\n", ap->id);
+
+ if (rc) {
+ /* FIXME: do something useful here?
+ * Current libata behavior will
+ * tear down everything when
+ * the module is removed
+ * or the h/w is unplugged.
+ */
}
- ap->sata_spd_limit = ap->hw_sata_spd_limit;
rc = scsi_add_host(ap->host, dev);
if (rc) {
- ata_port_printk(ap, KERN_ERR, "scsi_add_host failed\n");
+ printk(KERN_ERR "ata%u: scsi_add_host failed\n",
+ ap->id);
/* FIXME: do something useful here */
/* FIXME: handle unconditional calls to
* scsi_scan_host and ata_host_remove, below,
* at the very least
*/
}
-
- if (ap->ops->error_handler) {
- struct ata_eh_info *ehi = &ap->eh_info;
- unsigned long flags;
-
- ata_port_probe(ap);
-
- /* kick EH for boot probing */
- spin_lock_irqsave(ap->lock, flags);
-
- ehi->probe_mask = (1 << ATA_MAX_DEVICES) - 1;
- ehi->action |= ATA_EH_SOFTRESET;
- ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
-
- ap->pflags |= ATA_PFLAG_LOADING;
- ata_port_schedule_eh(ap);
-
- spin_unlock_irqrestore(ap->lock, flags);
-
- /* wait for EH to finish */
- ata_port_wait_eh(ap);
- } else {
- DPRINTK("ata%u: bus probe begin\n", ap->id);
- rc = ata_bus_probe(ap);
- DPRINTK("ata%u: bus probe end\n", ap->id);
-
- if (rc) {
- /* FIXME: do something useful here?
- * Current libata behavior will
- * tear down everything when
- * the module is removed
- * or the h/w is unplugged.
- */
- }
- }
}
/* probes are done, now scan each port's disk(s) */
- DPRINTK("host probe begin\n");
+ DPRINTK("probe begin\n");
for (i = 0; i < count; i++) {
struct ata_port *ap = host_set->ports[i];
err_out:
for (i = 0; i < count; i++) {
- struct ata_port *ap = host_set->ports[i];
- if (ap) {
- ap->ops->port_stop(ap);
- scsi_host_put(ap->host);
- }
+ ata_host_remove(host_set->ports[i], 1);
+ scsi_host_put(host_set->ports[i]->host);
}
err_free_ret:
kfree(host_set);
return 0;
}
-/**
- * ata_port_detach - Detach ATA port in prepration of device removal
- * @ap: ATA port to be detached
- *
- * Detach all ATA devices and the associated SCSI devices of @ap;
- * then, remove the associated SCSI host. @ap is guaranteed to
- * be quiescent on return from this function.
- *
- * LOCKING:
- * Kernel thread context (may sleep).
- */
-void ata_port_detach(struct ata_port *ap)
-{
- unsigned long flags;
- int i;
-
- if (!ap->ops->error_handler)
- goto skip_eh;
-
- /* tell EH we're leaving & flush EH */
- spin_lock_irqsave(ap->lock, flags);
- ap->pflags |= ATA_PFLAG_UNLOADING;
- spin_unlock_irqrestore(ap->lock, flags);
-
- ata_port_wait_eh(ap);
-
- /* EH is now guaranteed to see UNLOADING, so no new device
- * will be attached. Disable all existing devices.
- */
- spin_lock_irqsave(ap->lock, flags);
-
- for (i = 0; i < ATA_MAX_DEVICES; i++)
- ata_dev_disable(&ap->device[i]);
-
- spin_unlock_irqrestore(ap->lock, flags);
-
- /* Final freeze & EH. All in-flight commands are aborted. EH
- * will be skipped and retrials will be terminated with bad
- * target.
- */
- spin_lock_irqsave(ap->lock, flags);
- ata_port_freeze(ap); /* won't be thawed */
- spin_unlock_irqrestore(ap->lock, flags);
-
- ata_port_wait_eh(ap);
-
- /* Flush hotplug task. The sequence is similar to
- * ata_port_flush_task().
- */
- flush_workqueue(ata_aux_wq);
- cancel_delayed_work(&ap->hotplug_task);
- flush_workqueue(ata_aux_wq);
-
- skip_eh:
- /* remove the associated SCSI host */
- scsi_remove_host(ap->host);
-}
-
/**
* 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:
void ata_host_set_remove(struct ata_host_set *host_set)
{
+ struct ata_port *ap;
unsigned int i;
- for (i = 0; i < host_set->n_ports; i++)
- ata_port_detach(host_set->ports[i]);
+ for (i = 0; i < host_set->n_ports; i++) {
+ ap = host_set->ports[i];
+ scsi_remove_host(ap->host);
+ }
free_irq(host_set->irq, host_set);
for (i = 0; i < host_set->n_ports; i++) {
- struct ata_port *ap = host_set->ports[i];
+ ap = host_set->ports[i];
ata_scsi_release(ap->host);
int ata_scsi_release(struct Scsi_Host *host)
{
- struct ata_port *ap = ata_shost_to_port(host);
+ struct ata_port *ap = (struct ata_port *) &host->hostdata[0];
DPRINTK("ENTER\n");
ap->ops->port_disable(ap);
- ap->ops->port_stop(ap);
+ ata_host_remove(ap, 0);
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
{
struct device *dev = pci_dev_to_dev(pdev);
struct ata_host_set *host_set = dev_get_drvdata(dev);
- struct ata_host_set *host_set2 = host_set->next;
ata_host_set_remove(host_set);
- if (host_set2)
- ata_host_set_remove(host_set2);
-
pci_release_regions(pdev);
pci_disable_device(pdev);
dev_set_drvdata(dev, NULL);
return (tmp == bits->val) ? 1 : 0;
}
-void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t state)
+int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state)
{
pci_save_state(pdev);
-
- if (state.event == PM_EVENT_SUSPEND) {
- pci_disable_device(pdev);
- pci_set_power_state(pdev, PCI_D3hot);
- }
+ pci_disable_device(pdev);
+ pci_set_power_state(pdev, PCI_D3hot);
+ return 0;
}
-void ata_pci_device_do_resume(struct pci_dev *pdev)
+int ata_pci_device_resume(struct pci_dev *pdev)
{
pci_set_power_state(pdev, PCI_D0);
pci_restore_state(pdev);
pci_enable_device(pdev);
pci_set_master(pdev);
-}
-
-int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state)
-{
- struct ata_host_set *host_set = dev_get_drvdata(&pdev->dev);
- int rc = 0;
-
- rc = ata_host_set_suspend(host_set, state);
- if (rc)
- return rc;
-
- if (host_set->next) {
- rc = ata_host_set_suspend(host_set->next, state);
- if (rc) {
- ata_host_set_resume(host_set);
- return rc;
- }
- }
-
- ata_pci_device_do_suspend(pdev, state);
-
- return 0;
-}
-
-int ata_pci_device_resume(struct pci_dev *pdev)
-{
- struct ata_host_set *host_set = dev_get_drvdata(&pdev->dev);
-
- ata_pci_device_do_resume(pdev);
- ata_host_set_resume(host_set);
- if (host_set->next)
- ata_host_set_resume(host_set->next);
-
return 0;
}
#endif /* CONFIG_PCI */
static int __init ata_init(void)
{
- ata_probe_timeout *= HZ;
ata_wq = create_workqueue("ata");
if (!ata_wq)
return -ENOMEM;
- ata_aux_wq = create_singlethread_workqueue("ata_aux");
- if (!ata_aux_wq) {
- destroy_workqueue(ata_wq);
- return -ENOMEM;
- }
-
printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
return 0;
}
static void __exit ata_exit(void)
{
destroy_workqueue(ata_wq);
- destroy_workqueue(ata_aux_wq);
}
module_init(ata_init);
module_exit(ata_exit);
static unsigned long ratelimit_time;
-static DEFINE_SPINLOCK(ata_ratelimit_lock);
+static spinlock_t ata_ratelimit_lock = SPIN_LOCK_UNLOCKED;
int ata_ratelimit(void)
{
return rc;
}
-/**
- * ata_wait_register - wait until register value changes
- * @reg: IO-mapped register
- * @mask: Mask to apply to read register value
- * @val: Wait condition
- * @interval_msec: polling interval in milliseconds
- * @timeout_msec: timeout in milliseconds
- *
- * Waiting for some bits of register to change is a common
- * operation for ATA controllers. This function reads 32bit LE
- * IO-mapped register @reg and tests for the following condition.
- *
- * (*@reg & mask) != val
- *
- * If the condition is met, it returns; otherwise, the process is
- * repeated after @interval_msec until timeout.
- *
- * LOCKING:
- * Kernel thread context (may sleep)
- *
- * RETURNS:
- * The final register value.
- */
-u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
- unsigned long interval_msec,
- unsigned long timeout_msec)
-{
- unsigned long timeout;
- u32 tmp;
-
- tmp = ioread32(reg);
-
- /* Calculate timeout _after_ the first read to make sure
- * preceding writes reach the controller before starting to
- * eat away the timeout.
- */
- timeout = jiffies + (timeout_msec * HZ) / 1000;
-
- while ((tmp & mask) == val && time_before(jiffies, timeout)) {
- msleep(interval_msec);
- tmp = ioread32(reg);
- }
-
- return tmp;
-}
-
/*
* libata is essentially a library of internal helper functions for
* low-level ATA host controller drivers. As such, the API/ABI is
* Do not depend on ABI/API stability.
*/
-EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
-EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
-EXPORT_SYMBOL_GPL(sata_deb_timing_long);
EXPORT_SYMBOL_GPL(ata_std_bios_param);
EXPORT_SYMBOL_GPL(ata_std_ports);
EXPORT_SYMBOL_GPL(ata_device_add);
-EXPORT_SYMBOL_GPL(ata_port_detach);
EXPORT_SYMBOL_GPL(ata_host_set_remove);
EXPORT_SYMBOL_GPL(ata_sg_init);
EXPORT_SYMBOL_GPL(ata_sg_init_one);
-EXPORT_SYMBOL_GPL(ata_hsm_move);
EXPORT_SYMBOL_GPL(ata_qc_complete);
-EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
EXPORT_SYMBOL_GPL(ata_qc_issue_prot);
+EXPORT_SYMBOL_GPL(ata_eng_timeout);
EXPORT_SYMBOL_GPL(ata_tf_load);
EXPORT_SYMBOL_GPL(ata_tf_read);
EXPORT_SYMBOL_GPL(ata_noop_dev_select);
EXPORT_SYMBOL_GPL(ata_port_stop);
EXPORT_SYMBOL_GPL(ata_host_stop);
EXPORT_SYMBOL_GPL(ata_interrupt);
-EXPORT_SYMBOL_GPL(ata_mmio_data_xfer);
-EXPORT_SYMBOL_GPL(ata_pio_data_xfer);
-EXPORT_SYMBOL_GPL(ata_pio_data_xfer_noirq);
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(ata_bmdma_status);
EXPORT_SYMBOL_GPL(ata_bmdma_stop);
-EXPORT_SYMBOL_GPL(ata_bmdma_freeze);
-EXPORT_SYMBOL_GPL(ata_bmdma_thaw);
-EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh);
-EXPORT_SYMBOL_GPL(ata_bmdma_error_handler);
-EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd);
EXPORT_SYMBOL_GPL(ata_port_probe);
-EXPORT_SYMBOL_GPL(sata_set_spd);
-EXPORT_SYMBOL_GPL(sata_phy_debounce);
-EXPORT_SYMBOL_GPL(sata_phy_resume);
EXPORT_SYMBOL_GPL(sata_phy_reset);
EXPORT_SYMBOL_GPL(__sata_phy_reset);
EXPORT_SYMBOL_GPL(ata_bus_reset);
-EXPORT_SYMBOL_GPL(ata_std_prereset);
-EXPORT_SYMBOL_GPL(ata_std_softreset);
-EXPORT_SYMBOL_GPL(sata_std_hardreset);
-EXPORT_SYMBOL_GPL(ata_std_postreset);
-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_wait_register);
-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_slave_destroy);
-EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
EXPORT_SYMBOL_GPL(ata_scsi_release);
EXPORT_SYMBOL_GPL(ata_host_intr);
-EXPORT_SYMBOL_GPL(sata_scr_valid);
-EXPORT_SYMBOL_GPL(sata_scr_read);
-EXPORT_SYMBOL_GPL(sata_scr_write);
-EXPORT_SYMBOL_GPL(sata_scr_write_flush);
-EXPORT_SYMBOL_GPL(ata_port_online);
-EXPORT_SYMBOL_GPL(ata_port_offline);
-EXPORT_SYMBOL_GPL(ata_host_set_suspend);
-EXPORT_SYMBOL_GPL(ata_host_set_resume);
-EXPORT_SYMBOL_GPL(ata_id_string);
-EXPORT_SYMBOL_GPL(ata_id_c_string);
+EXPORT_SYMBOL_GPL(ata_dev_classify);
+EXPORT_SYMBOL_GPL(ata_dev_id_string);
+EXPORT_SYMBOL_GPL(ata_dev_config);
EXPORT_SYMBOL_GPL(ata_scsi_simulate);
EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
EXPORT_SYMBOL_GPL(ata_pci_init_native_mode);
EXPORT_SYMBOL_GPL(ata_pci_init_one);
EXPORT_SYMBOL_GPL(ata_pci_remove_one);
-EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
-EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
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);
+EXPORT_SYMBOL_GPL(ata_device_resume);
EXPORT_SYMBOL_GPL(ata_scsi_device_suspend);
EXPORT_SYMBOL_GPL(ata_scsi_device_resume);
-
-EXPORT_SYMBOL_GPL(ata_eng_timeout);
-EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
-EXPORT_SYMBOL_GPL(ata_port_abort);
-EXPORT_SYMBOL_GPL(ata_port_freeze);
-EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
-EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
-EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
-EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
-EXPORT_SYMBOL_GPL(ata_do_eh);
git://git.onelab.eu / linux-2.6.git / blobdiff