#include "libata.h"
-static unsigned int ata_busy_sleep (struct ata_port *ap,
- unsigned long tmout_pat,
- unsigned long tmout);
-static void ata_dev_reread_id(struct ata_port *ap, struct ata_device *dev);
-static void ata_dev_init_params(struct ata_port *ap, struct ata_device *dev);
+static unsigned int ata_dev_init_params(struct ata_port *ap,
+ struct ata_device *dev);
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 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 void ata_pio_error(struct ata_port *ap);
static unsigned int ata_unique_id = 1;
static struct workqueue_struct *ata_wq;
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
} else if (lba48 && (qc->ap->flags & ATA_FLAG_PIO_LBA48)) {
/* Unable to use DMA due to host limitation */
tf->protocol = ATA_PROT_PIO;
- index = dev->multi_count ? 0 : 4;
+ index = dev->multi_count ? 0 : 8;
} else {
tf->protocol = ATA_PROT_DMA;
index = 16;
* ata_dev_try_classify - Parse returned ATA device signature
* @ap: ATA channel to examine
* @device: Device to examine (starting at zero)
+ * @r_err: Value of error register on completion
*
* After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
* an ATA/ATAPI-defined set of values is placed in the ATA
*
* LOCKING:
* caller.
+ *
+ * RETURNS:
+ * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
*/
-static u8 ata_dev_try_classify(struct ata_port *ap, unsigned int device)
+static unsigned int
+ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err)
{
- struct ata_device *dev = &ap->device[device];
struct ata_taskfile tf;
unsigned int class;
u8 err;
ap->ops->tf_read(ap, &tf);
err = tf.feature;
-
- dev->class = ATA_DEV_NONE;
+ if (r_err)
+ *r_err = err;
/* see if device passed diags */
if (err == 1)
else if ((device == 0) && (err == 0x81))
/* do nothing */ ;
else
- return err;
+ return ATA_DEV_NONE;
- /* determine if device if ATA or ATAPI */
+ /* determine if device is ATA or ATAPI */
class = ata_dev_classify(&tf);
+
if (class == ATA_DEV_UNKNOWN)
- return err;
+ return ATA_DEV_NONE;
if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0))
- return err;
-
- dev->class = class;
-
- return err;
+ return ATA_DEV_NONE;
+ return class;
}
/**
- * ata_dev_id_string - Convert IDENTIFY DEVICE page into string
+ * ata_id_string - Convert IDENTIFY DEVICE page into string
* @id: IDENTIFY DEVICE results we will examine
* @s: string into which data is output
* @ofs: offset into identify device page
* caller.
*/
-void ata_dev_id_string(const u16 *id, unsigned char *s,
- unsigned int ofs, unsigned int len)
+void ata_id_string(const u16 *id, unsigned char *s,
+ unsigned int ofs, unsigned int len)
{
unsigned int c;
}
}
+/**
+ * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
+ * @id: IDENTIFY DEVICE results we will examine
+ * @s: string into which data is output
+ * @ofs: offset into identify device page
+ * @len: length of string to return. must be an odd number.
+ *
+ * This function is identical to ata_id_string except that it
+ * trims trailing spaces and terminates the resulting string with
+ * null. @len must be actual maximum length (even number) + 1.
+ *
+ * LOCKING:
+ * caller.
+ */
+void ata_id_c_string(const u16 *id, unsigned char *s,
+ unsigned int ofs, unsigned int len)
+{
+ unsigned char *p;
+
+ WARN_ON(!(len & 1));
+
+ ata_id_string(id, s, ofs, len - 1);
+
+ p = s + strnlen(s, len - 1);
+ while (p > s && p[-1] == ' ')
+ p--;
+ *p = '\0';
+}
+
+static u64 ata_id_n_sectors(const u16 *id)
+{
+ if (ata_id_has_lba(id)) {
+ if (ata_id_has_lba48(id))
+ return ata_id_u64(id, 100);
+ else
+ return ata_id_u32(id, 60);
+ } else {
+ if (ata_id_current_chs_valid(id))
+ return ata_id_u32(id, 57);
+ else
+ return id[1] * id[3] * id[6];
+ }
+}
/**
* ata_noop_dev_select - Select device 0/1 on ATA bus
/**
* ata_dump_id - IDENTIFY DEVICE info debugging output
- * @dev: Device whose IDENTIFY DEVICE page we will dump
+ * @id: IDENTIFY DEVICE page to dump
*
- * Dump selected 16-bit words from a detected device's
- * IDENTIFY PAGE page.
+ * Dump selected 16-bit words from the given IDENTIFY DEVICE
+ * page.
*
* LOCKING:
* caller.
*/
-static inline void ata_dump_id(const struct ata_device *dev)
+static inline void ata_dump_id(const u16 *id)
{
DPRINTK("49==0x%04x "
"53==0x%04x "
"63==0x%04x "
"64==0x%04x "
"75==0x%04x \n",
- dev->id[49],
- dev->id[53],
- dev->id[63],
- dev->id[64],
- dev->id[75]);
+ id[49],
+ id[53],
+ id[63],
+ id[64],
+ id[75]);
DPRINTK("80==0x%04x "
"81==0x%04x "
"82==0x%04x "
"83==0x%04x "
"84==0x%04x \n",
- dev->id[80],
- dev->id[81],
- dev->id[82],
- dev->id[83],
- dev->id[84]);
+ id[80],
+ id[81],
+ id[82],
+ id[83],
+ id[84]);
DPRINTK("88==0x%04x "
"93==0x%04x\n",
- dev->id[88],
- dev->id[93]);
+ id[88],
+ id[93]);
}
/*
timing API will get this right anyway */
}
-struct ata_exec_internal_arg {
- unsigned int err_mask;
- struct ata_taskfile *tf;
- struct completion *waiting;
-};
+static inline void
+ata_queue_pio_task(struct ata_port *ap)
+{
+ if (!(ap->flags & ATA_FLAG_FLUSH_PIO_TASK))
+ queue_work(ata_wq, &ap->pio_task);
+}
-int ata_qc_complete_internal(struct ata_queued_cmd *qc)
+static inline void
+ata_queue_delayed_pio_task(struct ata_port *ap, unsigned long delay)
{
- struct ata_exec_internal_arg *arg = qc->private_data;
- struct completion *waiting = arg->waiting;
+ if (!(ap->flags & ATA_FLAG_FLUSH_PIO_TASK))
+ queue_delayed_work(ata_wq, &ap->pio_task, delay);
+}
- 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);
+/**
+ * ata_flush_pio_tasks - Flush pio_task
+ * @ap: the target ata_port
+ *
+ * After this function completes, pio_task is
+ * guranteed not to be running or scheduled.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep)
+ */
- return 0;
+static void ata_flush_pio_tasks(struct ata_port *ap)
+{
+ int tmp = 0;
+ unsigned long flags;
+
+ DPRINTK("ENTER\n");
+
+ spin_lock_irqsave(&ap->host_set->lock, flags);
+ ap->flags |= ATA_FLAG_FLUSH_PIO_TASK;
+ spin_unlock_irqrestore(&ap->host_set->lock, flags);
+
+ DPRINTK("flush #1\n");
+ flush_workqueue(ata_wq);
+
+ /*
+ * At this point, if a task is running, it's guaranteed to see
+ * the FLUSH flag; thus, it will never queue pio tasks again.
+ * Cancel and flush.
+ */
+ tmp |= cancel_delayed_work(&ap->pio_task);
+ if (!tmp) {
+ DPRINTK("flush #2\n");
+ flush_workqueue(ata_wq);
+ }
+
+ spin_lock_irqsave(&ap->host_set->lock, flags);
+ ap->flags &= ~ATA_FLAG_FLUSH_PIO_TASK;
+ spin_unlock_irqrestore(&ap->host_set->lock, flags);
+
+ DPRINTK("EXIT\n");
+}
+
+void ata_qc_complete_internal(struct ata_queued_cmd *qc)
+{
+ struct completion *waiting = qc->private_data;
+
+ qc->ap->ops->tf_read(qc->ap, &qc->tf);
+ complete(waiting);
}
/**
struct ata_queued_cmd *qc;
DECLARE_COMPLETION(wait);
unsigned long flags;
- struct ata_exec_internal_arg arg;
+ unsigned int err_mask;
spin_lock_irqsave(&ap->host_set->lock, flags);
qc->nsect = buflen / ATA_SECT_SIZE;
}
- arg.waiting = &wait;
- arg.tf = tf;
- qc->private_data = &arg;
+ qc->private_data = &wait;
qc->complete_fn = ata_qc_complete_internal;
- if (ata_qc_issue(qc))
- goto issue_fail;
+ qc->err_mask = ata_qc_issue(qc);
+ if (qc->err_mask)
+ ata_qc_complete(qc);
spin_unlock_irqrestore(&ap->host_set->lock, flags);
* before the caller cleans up, it will result in a
* spurious interrupt. We can live with that.
*/
- if (arg.waiting) {
- qc->err_mask = AC_ERR_OTHER;
+ if (qc->flags & ATA_QCFLAG_ACTIVE) {
+ qc->err_mask = AC_ERR_TIMEOUT;
ata_qc_complete(qc);
printk(KERN_WARNING "ata%u: qc timeout (cmd 0x%x)\n",
ap->id, command);
spin_unlock_irqrestore(&ap->host_set->lock, flags);
}
- return arg.err_mask;
+ *tf = qc->tf;
+ err_mask = qc->err_mask;
- issue_fail:
ata_qc_free(qc);
- spin_unlock_irqrestore(&ap->host_set->lock, flags);
- return AC_ERR_OTHER;
+
+ return err_mask;
}
/**
}
/**
- * ata_dev_identify - obtain IDENTIFY x DEVICE page
- * @ap: port on which device we wish to probe resides
- * @device: device bus address, starting at zero
- *
- * Following bus reset, we issue the IDENTIFY [PACKET] DEVICE
- * command, and read back the 512-byte device information page.
- * The device information page is fed to us via the standard
- * PIO-IN protocol, but we hand-code it here. (TODO: investigate
- * using standard PIO-IN paths)
- *
- * After reading the device information page, we use several
- * bits of information from it to initialize data structures
- * that will be used during the lifetime of the ata_device.
- * Other data from the info page is used to disqualify certain
- * older ATA devices we do not wish to support.
+ * ata_dev_read_id - Read ID data from the specified device
+ * @ap: port on which target device resides
+ * @dev: target device
+ * @p_class: pointer to class of the target device (may be changed)
+ * @post_reset: is this read ID post-reset?
+ * @id: buffer to fill IDENTIFY page 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 takes care of EDD signature
+ * misreporting (to be removed once EDD support is gone) and
+ * issues ATA_CMD_INIT_DEV_PARAMS for pre-ATA4 drives.
*
* LOCKING:
- * Inherited from caller. Some functions called by this function
- * obtain the host_set lock.
+ * Kernel thread context (may sleep)
+ *
+ * RETURNS:
+ * 0 on success, -errno otherwise.
*/
-
-static void ata_dev_identify(struct ata_port *ap, unsigned int device)
+static int ata_dev_read_id(struct ata_port *ap, struct ata_device *dev,
+ unsigned int *p_class, int post_reset, u16 *id)
{
- struct ata_device *dev = &ap->device[device];
- unsigned int major_version;
- u16 tmp;
- unsigned long xfer_modes;
+ unsigned int class = *p_class;
unsigned int using_edd;
struct ata_taskfile tf;
- unsigned int err_mask;
+ unsigned int err_mask = 0;
+ const char *reason;
int rc;
- if (!ata_dev_present(dev)) {
- DPRINTK("ENTER/EXIT (host %u, dev %u) -- nodev\n",
- ap->id, device);
- return;
- }
+ DPRINTK("ENTER, host %u, dev %u\n", ap->id, dev->devno);
- if (ap->flags & (ATA_FLAG_SRST | ATA_FLAG_SATA_RESET))
+ if (ap->ops->probe_reset ||
+ 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);
-
- assert (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ATAPI ||
- dev->class == ATA_DEV_NONE);
+ ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */
- ata_dev_select(ap, device, 1, 1); /* select device 0/1 */
-
-retry:
- ata_tf_init(ap, &tf, device);
+ retry:
+ ata_tf_init(ap, &tf, dev->devno);
- if (dev->class == ATA_DEV_ATA) {
+ switch (class) {
+ case ATA_DEV_ATA:
tf.command = ATA_CMD_ID_ATA;
- DPRINTK("do ATA identify\n");
- } else {
+ break;
+ case ATA_DEV_ATAPI:
tf.command = ATA_CMD_ID_ATAPI;
- DPRINTK("do ATAPI identify\n");
+ break;
+ default:
+ rc = -ENODEV;
+ reason = "unsupported class";
+ goto err_out;
}
tf.protocol = ATA_PROT_PIO;
err_mask = ata_exec_internal(ap, dev, &tf, DMA_FROM_DEVICE,
- dev->id, sizeof(dev->id));
+ id, sizeof(id[0]) * ATA_ID_WORDS);
if (err_mask) {
+ rc = -EIO;
+ reason = "I/O error";
+
if (err_mask & ~AC_ERR_DEV)
goto err_out;
* ATA software reset (SRST, the default) does not appear
* to have this problem.
*/
- if ((using_edd) && (dev->class == ATA_DEV_ATA)) {
+ if ((using_edd) && (class == ATA_DEV_ATA)) {
u8 err = tf.feature;
if (err & ATA_ABORTED) {
- dev->class = ATA_DEV_ATAPI;
+ class = ATA_DEV_ATAPI;
goto retry;
}
}
goto err_out;
}
- swap_buf_le16(dev->id, ATA_ID_WORDS);
+ swap_buf_le16(id, ATA_ID_WORDS);
/* print device capabilities */
printk(KERN_DEBUG "ata%u: dev %u cfg "
"49:%04x 82:%04x 83:%04x 84:%04x 85:%04x 86:%04x 87:%04x 88:%04x\n",
- ap->id, device, dev->id[49],
- dev->id[82], dev->id[83], dev->id[84],
- dev->id[85], dev->id[86], dev->id[87],
- dev->id[88]);
+ ap->id, dev->devno,
+ id[49], id[82], id[83], id[84], id[85], id[86], id[87], id[88]);
+
+ /* sanity check */
+ if ((class == ATA_DEV_ATA) != ata_id_is_ata(id)) {
+ rc = -EINVAL;
+ reason = "device reports illegal type";
+ goto err_out;
+ }
+
+ if (post_reset && class == ATA_DEV_ATA) {
+ /*
+ * The exact sequence expected by certain pre-ATA4 drives is:
+ * SRST RESET
+ * IDENTIFY
+ * INITIALIZE DEVICE PARAMETERS
+ * 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(ap, dev);
+ if (err_mask) {
+ rc = -EIO;
+ reason = "INIT_DEV_PARAMS failed";
+ goto err_out;
+ }
+
+ /* current CHS translation info (id[53-58]) might be
+ * changed. reread the identify device info.
+ */
+ post_reset = 0;
+ goto retry;
+ }
+ }
+
+ *p_class = class;
+ return 0;
+
+ err_out:
+ printk(KERN_WARNING "ata%u: dev %u failed to IDENTIFY (%s)\n",
+ ap->id, dev->devno, reason);
+ kfree(id);
+ return rc;
+}
+
+/**
+ * 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:
+ * Inherited from caller. Some functions called by this function
+ * obtain the host_set lock.
+ */
+
+static void ata_dev_identify(struct ata_port *ap, unsigned int device)
+{
+ struct ata_device *dev = &ap->device[device];
+ unsigned long xfer_modes;
+ int i, rc;
+
+ if (!ata_dev_present(dev)) {
+ DPRINTK("ENTER/EXIT (host %u, dev %u) -- nodev\n",
+ ap->id, device);
+ return;
+ }
+
+ DPRINTK("ENTER, host %u, dev %u\n", ap->id, device);
+
+ rc = ata_dev_read_id(ap, dev, &dev->class, 1, dev->id);
+ if (rc)
+ goto err_out;
/*
* common ATA, ATAPI feature tests
if (!xfer_modes)
xfer_modes = ata_pio_modes(dev);
- ata_dump_id(dev);
+ ata_dump_id(dev->id);
/* 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
- * IDENTIFY
- * INITIALIZE DEVICE PARAMETERS
- * anything else..
- * Some drives were very specific about that exact sequence.
- */
- if (major_version < 4 || (!ata_id_has_lba(dev->id))) {
- ata_dev_init_params(ap, dev);
-
- /* current CHS translation info (id[53-58]) might be
- * changed. reread the identify device info.
- */
- ata_dev_reread_id(ap, dev);
- }
+ dev->n_sectors = ata_id_n_sectors(dev->id);
if (ata_id_has_lba(dev->id)) {
dev->flags |= ATA_DFLAG_LBA;
- if (ata_id_has_lba48(dev->id)) {
+ 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);
- }
/* 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_id_major_version(dev->id),
ata_mode_string(xfer_modes),
(unsigned long long)dev->n_sectors,
dev->flags & ATA_DFLAG_LBA48 ? " LBA48" : " LBA");
dev->cylinders = dev->id[1];
dev->heads = dev->id[3];
dev->sectors = dev->id[6];
- dev->n_sectors = dev->cylinders * dev->heads * dev->sectors;
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);
}
/* 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_id_major_version(dev->id),
ata_mode_string(xfer_modes),
(unsigned long long)dev->n_sectors,
(int)dev->cylinders, (int)dev->heads, (int)dev->sectors);
}
- ap->host->max_cmd_len = 16;
+ if (dev->id[59] & 0x100) {
+ dev->multi_count = dev->id[59] & 0xff;
+ DPRINTK("ata%u: dev %u multi count %u\n",
+ ap->id, device, dev->multi_count);
+ }
+
}
/* ATAPI-specific feature tests */
else if (dev->class == ATA_DEV_ATAPI) {
- if (ata_id_is_ata(dev->id)) /* sanity check */
- goto err_out_nosup;
-
rc = atapi_cdb_len(dev->id);
if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
printk(KERN_WARNING "ata%u: unsupported CDB len\n", ap->id);
goto err_out_nosup;
}
- ap->cdb_len = (unsigned int) rc;
- ap->host->max_cmd_len = (unsigned char) ap->cdb_len;
+ dev->cdb_len = (unsigned int) rc;
+
+ if (ata_id_cdb_intr(dev->id))
+ dev->flags |= ATA_DFLAG_CDB_INTR;
/* print device info to dmesg */
printk(KERN_INFO "ata%u: dev %u ATAPI, max %s\n",
ata_mode_string(xfer_modes));
}
+ 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);
+
DPRINTK("EXIT, drv_stat = 0x%x\n", ata_chk_status(ap));
return;
}
-static inline u8 ata_dev_knobble(const struct ata_port *ap)
+static inline u8 ata_dev_knobble(const struct ata_port *ap,
+ struct ata_device *dev)
{
- return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(ap->device->id)));
+ return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
}
/**
- * ata_dev_config - Run device specific handlers and check for
- * SATA->PATA bridges
- * @ap: Bus
- * @i: Device
+ * ata_dev_config - Run device specific handlers & check for SATA->PATA bridges
+ * @ap: Bus
+ * @i: Device
*
- * LOCKING:
+ * LOCKING:
*/
void ata_dev_config(struct ata_port *ap, unsigned int i)
{
/* limit bridge transfers to udma5, 200 sectors */
- if (ata_dev_knobble(ap)) {
+ if (ata_dev_knobble(ap, &ap->device[i])) {
printk(KERN_INFO "ata%u(%u): applying bridge limits\n",
- ap->id, ap->device->devno);
+ ap->id, i);
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;
+ ap->device[i].max_sectors = ATA_MAX_SECTORS;
}
if (ap->ops->dev_config)
{
unsigned int i, found = 0;
- ap->ops->phy_reset(ap);
+ if (ap->ops->probe_reset) {
+ unsigned int classes[ATA_MAX_DEVICES];
+ int rc;
+
+ ata_port_probe(ap);
+
+ rc = ap->ops->probe_reset(ap, classes);
+ if (rc == 0) {
+ for (i = 0; i < ATA_MAX_DEVICES; i++) {
+ if (classes[i] == ATA_DEV_UNKNOWN)
+ classes[i] = ATA_DEV_NONE;
+ ap->device[i].class = classes[i];
+ }
+ } else {
+ printk(KERN_ERR "ata%u: probe reset failed, "
+ "disabling port\n", ap->id);
+ ata_port_disable(ap);
+ }
+ } else
+ ap->ops->phy_reset(ap);
+
if (ap->flags & ATA_FLAG_PORT_DISABLED)
goto err_out;
ap->flags &= ~ATA_FLAG_PORT_DISABLED;
}
+/**
+ * sata_print_link_status - Print SATA link status
+ * @ap: SATA port to printk link status about
+ *
+ * This function prints link speed and status of a SATA link.
+ *
+ * LOCKING:
+ * None.
+ */
+static void sata_print_link_status(struct ata_port *ap)
+{
+ u32 sstatus, tmp;
+ const char *speed;
+
+ if (!ap->ops->scr_read)
+ return;
+
+ sstatus = scr_read(ap, SCR_STATUS);
+
+ if (sata_dev_present(ap)) {
+ tmp = (sstatus >> 4) & 0xf;
+ if (tmp & (1 << 0))
+ speed = "1.5";
+ else if (tmp & (1 << 1))
+ speed = "3.0";
+ else
+ speed = "<unknown>";
+ printk(KERN_INFO "ata%u: SATA link up %s Gbps (SStatus %X)\n",
+ ap->id, speed, sstatus);
+ } else {
+ printk(KERN_INFO "ata%u: SATA link down (SStatus %X)\n",
+ ap->id, sstatus);
+ }
+}
+
/**
* __sata_phy_reset - Wake/reset a low-level SATA PHY
* @ap: SATA port associated with target SATA PHY.
break;
} while (time_before(jiffies, timeout));
- /* TODO: phy layer with polling, timeouts, etc. */
- sstatus = scr_read(ap, SCR_STATUS);
- if (sata_dev_present(ap)) {
- const char *speed;
- u32 tmp;
+ /* print link status */
+ sata_print_link_status(ap);
- tmp = (sstatus >> 4) & 0xf;
- if (tmp & (1 << 0))
- speed = "1.5";
- else if (tmp & (1 << 1))
- speed = "3.0";
- else
- speed = "<unknown>";
- printk(KERN_INFO "ata%u: SATA link up %s Gbps (SStatus %X)\n",
- ap->id, speed, sstatus);
+ /* TODO: phy layer with polling, timeouts, etc. */
+ if (sata_dev_present(ap))
ata_port_probe(ap);
- } else {
- printk(KERN_INFO "ata%u: SATA link down (SStatus %X)\n",
- ap->id, sstatus);
+ else
ata_port_disable(ap);
- }
if (ap->flags & ATA_FLAG_PORT_DISABLED)
return;
ata_timing_quantize(t, t, T, UT);
/*
- * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, S.M.A.R.T
- * and some other commands. We have to ensure that the DMA cycle timing is
- * slower/equal than the fastest PIO timing.
+ * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
+ * S.M.A.R.T * and some other commands. We have to ensure that the
+ * DMA cycle timing is slower/equal than the fastest PIO timing.
*/
if (speed > XFER_PIO_4) {
}
/*
- * Lenghten active & recovery time so that cycle time is correct.
+ * Lengthen active & recovery time so that cycle time is correct.
*/
if (t->act8b + t->rec8b < t->cyc8b) {
*
* LOCKING:
* PCI/etc. bus probe sem.
- *
*/
static void ata_set_mode(struct ata_port *ap)
{
ata_port_disable(ap);
}
+/**
+ * ata_tf_to_host - issue ATA taskfile to host controller
+ * @ap: port to which command is being issued
+ * @tf: ATA taskfile register set
+ *
+ * Issues ATA taskfile register set to ATA host controller,
+ * with proper synchronization with interrupt handler and
+ * other threads.
+ *
+ * LOCKING:
+ * spin_lock_irqsave(host_set lock)
+ */
+
+static inline void ata_tf_to_host(struct ata_port *ap,
+ const struct ata_taskfile *tf)
+{
+ ap->ops->tf_load(ap, tf);
+ ap->ops->exec_command(ap, tf);
+}
+
/**
* ata_busy_sleep - sleep until BSY clears, or timeout
* @ap: port containing status register to be polled
* or a timeout occurs.
*
* LOCKING: None.
- *
*/
-static unsigned int ata_busy_sleep (struct ata_port *ap,
- unsigned long tmout_pat,
- unsigned long tmout)
+unsigned int ata_busy_sleep (struct ata_port *ap,
+ unsigned long tmout_pat, unsigned long tmout)
{
unsigned long timer_start, timeout;
u8 status;
/*
* determine by signature whether we have ATA or ATAPI devices
*/
- err = ata_dev_try_classify(ap, 0);
+ ap->device[0].class = ata_dev_try_classify(ap, 0, &err);
if ((slave_possible) && (err != 0x81))
- ata_dev_try_classify(ap, 1);
+ ap->device[1].class = ata_dev_try_classify(ap, 1, &err);
/* re-enable interrupts */
if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */
DPRINTK("EXIT\n");
return;
-err_out:
- printk(KERN_ERR "ata%u: disabling port\n", ap->id);
- ap->ops->port_disable(ap);
+err_out:
+ printk(KERN_ERR "ata%u: disabling port\n", ap->id);
+ ap->ops->port_disable(ap);
+
+ DPRINTK("EXIT\n");
+}
+
+static int sata_phy_resume(struct ata_port *ap)
+{
+ unsigned long timeout = jiffies + (HZ * 5);
+ u32 sstatus;
+
+ scr_write_flush(ap, SCR_CONTROL, 0x300);
+
+ /* Wait for phy to become ready, if necessary. */
+ do {
+ msleep(200);
+ sstatus = scr_read(ap, SCR_STATUS);
+ if ((sstatus & 0xf) != 1)
+ return 0;
+ } while (time_before(jiffies, timeout));
+
+ return -1;
+}
+
+/**
+ * ata_std_probeinit - initialize probing
+ * @ap: port to be probed
+ *
+ * @ap is about to be probed. Initialize it. This function is
+ * to be used as standard callback for ata_drive_probe_reset().
+ *
+ * NOTE!!! Do not use this function as probeinit if a low level
+ * driver implements only hardreset. Just pass NULL as probeinit
+ * in that case. Using this function is probably okay but doing
+ * so makes reset sequence different from the original
+ * ->phy_reset implementation and Jeff nervous. :-P
+ */
+extern void ata_std_probeinit(struct ata_port *ap)
+{
+ if (ap->flags & ATA_FLAG_SATA && ap->ops->scr_read) {
+ sata_phy_resume(ap);
+ if (sata_dev_present(ap))
+ ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
+ }
+}
+
+/**
+ * ata_std_softreset - reset host port via ATA SRST
+ * @ap: port to reset
+ * @verbose: fail verbosely
+ * @classes: resulting classes of attached devices
+ *
+ * Reset host port using ATA SRST. This function is to be used
+ * as standard callback for ata_drive_*_reset() functions.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep)
+ *
+ * RETURNS:
+ * 0 on success, -errno otherwise.
+ */
+int ata_std_softreset(struct ata_port *ap, int verbose, unsigned int *classes)
+{
+ unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
+ unsigned int devmask = 0, err_mask;
+ u8 err;
+
+ DPRINTK("ENTER\n");
+
+ if (ap->ops->scr_read && !sata_dev_present(ap)) {
+ classes[0] = ATA_DEV_NONE;
+ goto out;
+ }
+
+ /* determine if device 0/1 are present */
+ if (ata_devchk(ap, 0))
+ devmask |= (1 << 0);
+ if (slave_possible && ata_devchk(ap, 1))
+ devmask |= (1 << 1);
+
+ /* select device 0 again */
+ ap->ops->dev_select(ap, 0);
+
+ /* issue bus reset */
+ DPRINTK("about to softreset, devmask=%x\n", devmask);
+ err_mask = ata_bus_softreset(ap, devmask);
+ if (err_mask) {
+ if (verbose)
+ printk(KERN_ERR "ata%u: SRST failed (err_mask=0x%x)\n",
+ ap->id, err_mask);
+ else
+ DPRINTK("EXIT, softreset failed (err_mask=0x%x)\n",
+ err_mask);
+ return -EIO;
+ }
+
+ /* determine by signature whether we have ATA or ATAPI devices */
+ classes[0] = ata_dev_try_classify(ap, 0, &err);
+ if (slave_possible && err != 0x81)
+ classes[1] = ata_dev_try_classify(ap, 1, &err);
+
+ out:
+ DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]);
+ return 0;
+}
+
+/**
+ * sata_std_hardreset - reset host port via SATA phy reset
+ * @ap: port to reset
+ * @verbose: fail verbosely
+ * @class: resulting class of attached device
+ *
+ * SATA phy-reset host port using DET bits of SControl register.
+ * This function is to be used as standard callback for
+ * ata_drive_*_reset().
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep)
+ *
+ * RETURNS:
+ * 0 on success, -errno otherwise.
+ */
+int sata_std_hardreset(struct ata_port *ap, int verbose, unsigned int *class)
+{
+ DPRINTK("ENTER\n");
+
+ /* Issue phy wake/reset */
+ scr_write_flush(ap, SCR_CONTROL, 0x301);
+
+ /*
+ * Couldn't find anything in SATA I/II specs, but AHCI-1.1
+ * 10.4.2 says at least 1 ms.
+ */
+ msleep(1);
+
+ /* Bring phy back */
+ sata_phy_resume(ap);
+
+ /* TODO: phy layer with polling, timeouts, etc. */
+ if (!sata_dev_present(ap)) {
+ *class = ATA_DEV_NONE;
+ DPRINTK("EXIT, link offline\n");
+ return 0;
+ }
+
+ if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
+ if (verbose)
+ printk(KERN_ERR "ata%u: COMRESET failed "
+ "(device not ready)\n", ap->id);
+ else
+ DPRINTK("EXIT, device not ready\n");
+ return -EIO;
+ }
+
+ ap->ops->dev_select(ap, 0); /* probably unnecessary */
+
+ *class = ata_dev_try_classify(ap, 0, NULL);
+
+ DPRINTK("EXIT, class=%u\n", *class);
+ return 0;
+}
+
+/**
+ * ata_std_postreset - standard postreset callback
+ * @ap: the target ata_port
+ * @classes: classes of attached devices
+ *
+ * This function is invoked after a successful reset. Note that
+ * the device might have been reset more than once using
+ * different reset methods before postreset is invoked.
+ *
+ * This function is to be used as standard callback for
+ * ata_drive_*_reset().
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep)
+ */
+void ata_std_postreset(struct ata_port *ap, unsigned int *classes)
+{
+ DPRINTK("ENTER\n");
+
+ /* set cable type if it isn't already set */
+ if (ap->cbl == ATA_CBL_NONE && ap->flags & ATA_FLAG_SATA)
+ ap->cbl = ATA_CBL_SATA;
+
+ /* print link status */
+ if (ap->cbl == ATA_CBL_SATA)
+ sata_print_link_status(ap);
+
+ /* re-enable interrupts */
+ if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */
+ ata_irq_on(ap);
+
+ /* is double-select really necessary? */
+ if (classes[0] != ATA_DEV_NONE)
+ ap->ops->dev_select(ap, 1);
+ if (classes[1] != ATA_DEV_NONE)
+ ap->ops->dev_select(ap, 0);
+
+ /* bail out if no device is present */
+ if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) {
+ DPRINTK("EXIT, no device\n");
+ return;
+ }
+
+ /* set up device control */
+ if (ap->ioaddr.ctl_addr) {
+ if (ap->flags & ATA_FLAG_MMIO)
+ writeb(ap->ctl, (void __iomem *) ap->ioaddr.ctl_addr);
+ else
+ outb(ap->ctl, ap->ioaddr.ctl_addr);
+ }
+
+ DPRINTK("EXIT\n");
+}
+
+/**
+ * ata_std_probe_reset - standard probe reset method
+ * @ap: prot to perform probe-reset
+ * @classes: resulting classes of attached devices
+ *
+ * The stock off-the-shelf ->probe_reset method.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep)
+ *
+ * RETURNS:
+ * 0 on success, -errno otherwise.
+ */
+int ata_std_probe_reset(struct ata_port *ap, unsigned int *classes)
+{
+ ata_reset_fn_t hardreset;
+
+ hardreset = NULL;
+ if (ap->flags & ATA_FLAG_SATA && ap->ops->scr_read)
+ hardreset = sata_std_hardreset;
+
+ return ata_drive_probe_reset(ap, ata_std_probeinit,
+ ata_std_softreset, hardreset,
+ ata_std_postreset, classes);
+}
+
+static int do_probe_reset(struct ata_port *ap, ata_reset_fn_t reset,
+ ata_postreset_fn_t postreset,
+ unsigned int *classes)
+{
+ int i, rc;
+
+ for (i = 0; i < ATA_MAX_DEVICES; i++)
+ classes[i] = ATA_DEV_UNKNOWN;
+
+ rc = reset(ap, 0, classes);
+ if (rc)
+ return rc;
+
+ /* If any class isn't ATA_DEV_UNKNOWN, consider classification
+ * is complete and convert all ATA_DEV_UNKNOWN to
+ * ATA_DEV_NONE.
+ */
+ for (i = 0; i < ATA_MAX_DEVICES; i++)
+ if (classes[i] != ATA_DEV_UNKNOWN)
+ break;
+
+ if (i < ATA_MAX_DEVICES)
+ for (i = 0; i < ATA_MAX_DEVICES; i++)
+ if (classes[i] == ATA_DEV_UNKNOWN)
+ classes[i] = ATA_DEV_NONE;
+
+ if (postreset)
+ postreset(ap, classes);
+
+ return classes[0] != ATA_DEV_UNKNOWN ? 0 : -ENODEV;
+}
+
+/**
+ * ata_drive_probe_reset - Perform probe reset with given methods
+ * @ap: port to reset
+ * @probeinit: probeinit method (can be NULL)
+ * @softreset: softreset method (can be NULL)
+ * @hardreset: hardreset method (can be NULL)
+ * @postreset: postreset method (can be NULL)
+ * @classes: resulting classes of attached devices
+ *
+ * Reset the specified port and classify attached devices using
+ * given methods. This function prefers softreset but tries all
+ * possible reset sequences to reset and classify devices. This
+ * function is intended to be used for constructing ->probe_reset
+ * callback by low level drivers.
+ *
+ * Reset methods should follow the following rules.
+ *
+ * - Return 0 on sucess, -errno on failure.
+ * - If classification is supported, fill classes[] with
+ * recognized class codes.
+ * - If classification is not supported, leave classes[] alone.
+ * - If verbose is non-zero, print error message on failure;
+ * otherwise, shut up.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep)
+ *
+ * RETURNS:
+ * 0 on success, -EINVAL if no reset method is avaliable, -ENODEV
+ * if classification fails, and any error code from reset
+ * methods.
+ */
+int ata_drive_probe_reset(struct ata_port *ap, ata_probeinit_fn_t probeinit,
+ ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
+ ata_postreset_fn_t postreset, unsigned int *classes)
+{
+ int rc = -EINVAL;
+
+ if (probeinit)
+ probeinit(ap);
+
+ if (softreset) {
+ rc = do_probe_reset(ap, softreset, postreset, classes);
+ if (rc == 0)
+ return 0;
+ }
+
+ if (!hardreset)
+ return rc;
+
+ rc = do_probe_reset(ap, hardreset, postreset, classes);
+ if (rc == 0 || rc != -ENODEV)
+ return rc;
+
+ if (softreset)
+ rc = do_probe_reset(ap, softreset, postreset, classes);
- DPRINTK("EXIT\n");
+ return rc;
}
static void ata_pr_blacklisted(const struct ata_port *ap,
static int ata_dma_blacklisted(const struct ata_device *dev)
{
- unsigned char model_num[40];
- char *s;
- unsigned int len;
+ unsigned char model_num[41];
int i;
- ata_dev_id_string(dev->id, model_num, ATA_ID_PROD_OFS,
- sizeof(model_num));
- s = &model_num[0];
- len = strnlen(s, sizeof(model_num));
-
- /* ATAPI specifies that empty space is blank-filled; remove blanks */
- while ((len > 0) && (s[len - 1] == ' ')) {
- len--;
- s[len] = 0;
- }
+ ata_id_c_string(dev->id, model_num, ATA_ID_PROD_OFS, sizeof(model_num));
for (i = 0; i < ARRAY_SIZE(ata_dma_blacklist); i++)
- if (!strncmp(ata_dma_blacklist[i], s, len))
+ if (!strcmp(ata_dma_blacklist[i], model_num))
return 1;
return 0;
master = &ap->device[0];
slave = &ap->device[1];
- assert (ata_dev_present(master) || ata_dev_present(slave));
+ WARN_ON(!ata_dev_present(master) && !ata_dev_present(slave));
if (shift == ATA_SHIFT_UDMA) {
mask = ap->udma_mask;
DPRINTK("EXIT\n");
}
-/**
- * ata_dev_reread_id - Reread the device identify device info
- * @ap: port where the device is
- * @dev: device to reread the identify device info
- *
- * LOCKING:
- */
-
-static void ata_dev_reread_id(struct ata_port *ap, struct ata_device *dev)
-{
- struct ata_taskfile tf;
-
- ata_tf_init(ap, &tf, dev->devno);
-
- if (dev->class == ATA_DEV_ATA) {
- tf.command = ATA_CMD_ID_ATA;
- DPRINTK("do ATA identify\n");
- } else {
- tf.command = ATA_CMD_ID_ATAPI;
- DPRINTK("do ATAPI identify\n");
- }
-
- tf.flags |= ATA_TFLAG_DEVICE;
- tf.protocol = ATA_PROT_PIO;
-
- if (ata_exec_internal(ap, dev, &tf, DMA_FROM_DEVICE,
- dev->id, sizeof(dev->id)))
- goto err_out;
-
- swap_buf_le16(dev->id, ATA_ID_WORDS);
-
- ata_dump_id(dev);
-
- DPRINTK("EXIT\n");
-
- return;
-err_out:
- printk(KERN_ERR "ata%u: failed to reread ID, disabled\n", ap->id);
- ata_port_disable(ap);
-}
-
/**
* 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)
+ *
+ * RETURNS:
+ * 0 on success, AC_ERR_* mask otherwise.
*/
-static void ata_dev_init_params(struct ata_port *ap, struct ata_device *dev)
+static unsigned int ata_dev_init_params(struct ata_port *ap,
+ struct ata_device *dev)
{
struct ata_taskfile tf;
+ unsigned int err_mask;
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;
+ return 0;
/* set up init dev params taskfile */
DPRINTK("init dev params \n");
tf.nsect = sectors;
tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
- if (ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0)) {
- printk(KERN_ERR "ata%u: failed to init parameters, disabled\n",
- ap->id);
- ata_port_disable(ap);
- }
+ err_mask = ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0);
- DPRINTK("EXIT\n");
+ DPRINTK("EXIT, err_mask=%x\n", err_mask);
+ return err_mask;
}
/**
int dir = qc->dma_dir;
void *pad_buf = NULL;
- assert(qc->flags & ATA_QCFLAG_DMAMAP);
- assert(sg != NULL);
+ WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP));
+ WARN_ON(sg == NULL);
if (qc->flags & ATA_QCFLAG_SINGLE)
- assert(qc->n_elem == 1);
+ WARN_ON(qc->n_elem > 1);
VPRINTK("unmapping %u sg elements\n", qc->n_elem);
kunmap_atomic(addr, KM_IRQ0);
}
} else {
- if (sg_dma_len(&sg[0]) > 0)
+ if (qc->n_elem)
dma_unmap_single(ap->host_set->dev,
sg_dma_address(&sg[0]), sg_dma_len(&sg[0]),
dir);
struct scatterlist *sg;
unsigned int idx;
- assert(qc->__sg != NULL);
- assert(qc->n_elem > 0);
+ WARN_ON(qc->__sg == NULL);
+ WARN_ON(qc->n_elem == 0 && qc->pad_len == 0);
idx = 0;
ata_for_each_sg(sg, qc) {
int dir = qc->dma_dir;
struct scatterlist *sg = qc->__sg;
dma_addr_t dma_address;
+ int trim_sg = 0;
/* we must lengthen transfers to end on a 32-bit boundary */
qc->pad_len = sg->length & 3;
void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
struct scatterlist *psg = &qc->pad_sgent;
- assert(qc->dev->class == ATA_DEV_ATAPI);
+ WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
memset(pad_buf, 0, ATA_DMA_PAD_SZ);
sg_dma_len(psg) = ATA_DMA_PAD_SZ;
/* trim sg */
sg->length -= qc->pad_len;
+ if (sg->length == 0)
+ trim_sg = 1;
DPRINTK("padding done, sg->length=%u pad_len=%u\n",
sg->length, qc->pad_len);
}
- if (!sg->length) {
- sg_dma_address(sg) = 0;
+ if (trim_sg) {
+ qc->n_elem--;
goto skip_map;
}
}
sg_dma_address(sg) = dma_address;
-skip_map:
sg_dma_len(sg) = sg->length;
+skip_map:
DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg),
qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
int n_elem, pre_n_elem, dir, trim_sg = 0;
VPRINTK("ENTER, ata%u\n", ap->id);
- assert(qc->flags & ATA_QCFLAG_SG);
+ WARN_ON(!(qc->flags & ATA_QCFLAG_SG));
/* we must lengthen transfers to end on a 32-bit boundary */
qc->pad_len = lsg->length & 3;
struct scatterlist *psg = &qc->pad_sgent;
unsigned int offset;
- assert(qc->dev->class == ATA_DEV_ATAPI);
+ WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
memset(pad_buf, 0, ATA_DMA_PAD_SZ);
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 -
+ * ata_pio_poll - poll using PIO, depending on current state
* @ap: the target ata_port
*
* LOCKING:
unsigned int reg_state = HSM_ST_UNKNOWN;
qc = ata_qc_from_tag(ap, ap->active_tag);
- assert(qc != NULL);
+ WARN_ON(qc == NULL);
switch (ap->hsm_task_state) {
case HSM_ST:
status = ata_chk_status(ap);
if (status & ATA_BUSY) {
if (time_after(jiffies, ap->pio_task_timeout)) {
- qc->err_mask |= AC_ERR_ATA_BUS;
+ qc->err_mask |= AC_ERR_TIMEOUT;
ap->hsm_task_state = HSM_ST_TMOUT;
return 0;
}
* None. (executing in kernel thread context)
*
* RETURNS:
- * Non-zero if qc completed, zero otherwise.
+ * Zero if qc completed.
+ * Non-zero if has next.
*/
static int ata_pio_complete (struct ata_port *ap)
* 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.
+ * HSM_ST_LAST_POLL state.
*/
drv_stat = ata_busy_wait(ap, ATA_BUSY, 10);
if (drv_stat & ATA_BUSY) {
if (drv_stat & ATA_BUSY) {
ap->hsm_task_state = HSM_ST_LAST_POLL;
ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO;
- return 0;
+ return 1;
}
}
qc = ata_qc_from_tag(ap, ap->active_tag);
- assert(qc != NULL);
+ WARN_ON(qc == NULL);
drv_stat = ata_wait_idle(ap);
if (!ata_ok(drv_stat)) {
qc->err_mask |= __ac_err_mask(drv_stat);
ap->hsm_task_state = HSM_ST_ERR;
- return 0;
+ return 1;
}
ap->hsm_task_state = HSM_ST_IDLE;
- assert(qc->err_mask == 0);
+ WARN_ON(qc->err_mask);
ata_poll_qc_complete(qc);
/* another command may start at this point */
- return 1;
+ return 0;
}
/**
- * swap_buf_le16 - swap halves of 16-words in place
+ * swap_buf_le16 - swap halves of 16-bit words in place
* @buf: Buffer to swap
* @buf_words: Number of 16-bit words in buffer.
*
page = nth_page(page, (offset >> PAGE_SHIFT));
offset %= PAGE_SIZE;
- buf = kmap(page) + offset;
+ DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
+
+ if (PageHighMem(page)) {
+ unsigned long flags;
+
+ local_irq_save(flags);
+ buf = kmap_atomic(page, KM_IRQ0);
+
+ /* do the actual data transfer */
+ ata_data_xfer(ap, buf + offset, ATA_SECT_SIZE, do_write);
+
+ kunmap_atomic(buf, KM_IRQ0);
+ local_irq_restore(flags);
+ } else {
+ buf = page_address(page);
+ ata_data_xfer(ap, buf + offset, ATA_SECT_SIZE, do_write);
+ }
qc->cursect++;
qc->cursg_ofs++;
qc->cursg++;
qc->cursg_ofs = 0;
}
+}
- DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
+/**
+ * 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);
+
+ ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1);
+ ata_altstatus(ap); /* flush */
+
+ 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;
+ }
+}
+
+/**
+ * ata_pio_first_block - Write first data block to hardware
+ * @ap: Port to which ATA/ATAPI device is attached.
+ *
+ * When device has indicated its readiness to accept
+ * the data, this function sends out the CDB or
+ * the first data block by PIO.
+ * After this,
+ * - If polling, ata_pio_task() handles the rest.
+ * - Otherwise, interrupt handler takes over.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep)
+ *
+ * RETURNS:
+ * Zero if irq handler takes over
+ * Non-zero if has next (polling).
+ */
+
+static int ata_pio_first_block(struct ata_port *ap)
+{
+ struct ata_queued_cmd *qc;
+ u8 status;
+ unsigned long flags;
+ int has_next;
+
+ qc = ata_qc_from_tag(ap, ap->active_tag);
+ WARN_ON(qc == NULL);
+ WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0);
+
+ /* if polling, we will stay in the work queue after sending the data.
+ * otherwise, interrupt handler takes over after sending the data.
+ */
+ has_next = (qc->tf.flags & ATA_TFLAG_POLLING);
+
+ /* sleep-wait for BSY to clear */
+ DPRINTK("busy wait\n");
+ if (ata_busy_sleep(ap, ATA_TMOUT_DATAOUT_QUICK, ATA_TMOUT_DATAOUT)) {
+ qc->err_mask |= AC_ERR_TIMEOUT;
+ ap->hsm_task_state = HSM_ST_TMOUT;
+ goto err_out;
+ }
+
+ /* make sure DRQ is set */
+ status = ata_chk_status(ap);
+ if ((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ) {
+ /* device status error */
+ qc->err_mask |= AC_ERR_HSM;
+ ap->hsm_task_state = HSM_ST_ERR;
+ goto err_out;
+ }
+
+ /* 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.
+ */
+ spin_lock_irqsave(&ap->host_set->lock, flags);
+
+ if (qc->tf.protocol == ATA_PROT_PIO) {
+ /* PIO data out protocol.
+ * send first data block.
+ */
+
+ /* 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);
- /* do the actual data transfer */
- do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
- ata_data_xfer(ap, buf, ATA_SECT_SIZE, do_write);
+ spin_unlock_irqrestore(&ap->host_set->lock, flags);
+
+ /* if polling, ata_pio_task() handles the rest.
+ * otherwise, interrupt handler takes over from here.
+ */
+ return has_next;
- kunmap(page);
+err_out:
+ return 1; /* has next */
}
/**
/* don't cross page boundaries */
count = min(count, (unsigned int)PAGE_SIZE - offset);
- buf = kmap(page) + offset;
+ DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
+
+ if (PageHighMem(page)) {
+ unsigned long flags;
+
+ local_irq_save(flags);
+ buf = kmap_atomic(page, KM_IRQ0);
+
+ /* do the actual data transfer */
+ ata_data_xfer(ap, buf + offset, count, do_write);
+
+ kunmap_atomic(buf, KM_IRQ0);
+ local_irq_restore(flags);
+ } else {
+ buf = page_address(page);
+ ata_data_xfer(ap, buf + offset, count, do_write);
+ }
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;
}
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:
printk(KERN_INFO "ata%u: dev %u: ATAPI check failed\n",
ap->id, dev->devno);
- qc->err_mask |= AC_ERR_ATA_BUS;
+ qc->err_mask |= AC_ERR_HSM;
ap->hsm_task_state = HSM_ST_ERR;
}
}
qc = ata_qc_from_tag(ap, ap->active_tag);
- assert(qc != NULL);
+ WARN_ON(qc == NULL);
/* check error */
if (status & (ATA_ERR | ATA_DF)) {
} else {
/* handle BSY=0, DRQ=0 as error */
if ((status & ATA_DRQ) == 0) {
- qc->err_mask |= AC_ERR_ATA_BUS;
+ qc->err_mask |= AC_ERR_HSM;
ap->hsm_task_state = HSM_ST_ERR;
return;
}
- ata_pio_sector(qc);
+ ata_pio_sectors(qc);
}
+
+ ata_altstatus(ap); /* flush */
}
static void ata_pio_error(struct ata_port *ap)
{
struct ata_queued_cmd *qc;
- printk(KERN_WARNING "ata%u: PIO error\n", ap->id);
-
qc = ata_qc_from_tag(ap, ap->active_tag);
- assert(qc != NULL);
+ WARN_ON(qc == NULL);
+
+ if (qc->tf.command != ATA_CMD_PACKET)
+ printk(KERN_WARNING "ata%u: PIO error\n", ap->id);
/* make sure qc->err_mask is available to
* know what's wrong and recover
*/
- assert(qc->err_mask);
+ WARN_ON(qc->err_mask == 0);
ap->hsm_task_state = HSM_ST_IDLE;
{
struct ata_port *ap = _data;
unsigned long timeout;
- int qc_completed;
+ int has_next;
fsm_start:
timeout = 0;
- qc_completed = 0;
+ has_next = 1;
switch (ap->hsm_task_state) {
- case HSM_ST_IDLE:
- return;
+ case HSM_ST_FIRST:
+ has_next = ata_pio_first_block(ap);
+ break;
case HSM_ST:
ata_pio_block(ap);
break;
case HSM_ST_LAST:
- qc_completed = ata_pio_complete(ap);
+ has_next = ata_pio_complete(ap);
break;
case HSM_ST_POLL:
case HSM_ST_ERR:
ata_pio_error(ap);
return;
+
+ default:
+ BUG();
+ return;
}
if (timeout)
- queue_delayed_work(ata_wq, &ap->pio_task, timeout);
- else if (!qc_completed)
+ ata_queue_delayed_pio_task(ap, timeout);
+ else if (has_next)
goto fsm_start;
}
DPRINTK("ENTER\n");
- spin_lock_irqsave(&host_set->lock, flags);
+ ata_flush_pio_tasks(ap);
+ ap->hsm_task_state = HSM_ST_IDLE;
- /* hack alert! We cannot use the supplied completion
- * function from inside the ->eh_strategy_handler() thread.
- * libata is the only user of ->eh_strategy_handler() in
- * any kernel, so the default scsi_done() assumes it is
- * not being called from the SCSI EH.
- */
- qc->scsidone = scsi_finish_command;
+ spin_lock_irqsave(&host_set->lock, flags);
switch (qc->tf.protocol) {
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);
+ ap->hsm_task_state = HSM_ST_IDLE;
+
/* complete taskfile transaction */
- qc->err_mask |= ac_err_mask(drv_stat);
- ata_qc_complete(qc);
+ qc->err_mask |= AC_ERR_TIMEOUT;
break;
}
spin_unlock_irqrestore(&host_set->lock, flags);
+ ata_eh_qc_complete(qc);
+
DPRINTK("EXIT\n");
}
void ata_eng_timeout(struct ata_port *ap)
{
- struct ata_queued_cmd *qc;
-
DPRINTK("ENTER\n");
- qc = ata_qc_from_tag(ap, ap->active_tag);
- if (qc)
- ata_qc_timeout(qc);
- else {
- printk(KERN_ERR "ata%u: BUG: timeout without command\n",
- ap->id);
- goto out;
- }
+ ata_qc_timeout(ata_qc_from_tag(ap, ap->active_tag));
-out:
DPRINTK("EXIT\n");
}
return qc;
}
-static void __ata_qc_complete(struct ata_queued_cmd *qc)
-{
- struct ata_port *ap = qc->ap;
- unsigned int tag;
-
- qc->flags = 0;
- tag = qc->tag;
- if (likely(ata_tag_valid(tag))) {
- if (tag == ap->active_tag)
- ap->active_tag = ATA_TAG_POISON;
- qc->tag = ATA_TAG_POISON;
- clear_bit(tag, &ap->qactive);
- }
-}
-
/**
* ata_qc_free - free unused ata_queued_cmd
* @qc: Command to complete
*/
void ata_qc_free(struct ata_queued_cmd *qc)
{
- assert(qc != NULL); /* ata_qc_from_tag _might_ return NULL */
+ struct ata_port *ap = qc->ap;
+ unsigned int tag;
- __ata_qc_complete(qc);
-}
+ WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
-/**
- * ata_qc_complete - Complete an active ATA command
- * @qc: Command to complete
- * @err_mask: ATA Status register contents
- *
- * Indicate to the mid and upper layers that an ATA
- * command has completed, with either an ok or not-ok status.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- */
+ qc->flags = 0;
+ tag = qc->tag;
+ if (likely(ata_tag_valid(tag))) {
+ if (tag == ap->active_tag)
+ ap->active_tag = ATA_TAG_POISON;
+ qc->tag = ATA_TAG_POISON;
+ clear_bit(tag, &ap->qactive);
+ }
+}
-void ata_qc_complete(struct ata_queued_cmd *qc)
+void __ata_qc_complete(struct ata_queued_cmd *qc)
{
- int rc;
-
- assert(qc != NULL); /* ata_qc_from_tag _might_ return NULL */
- assert(qc->flags & ATA_QCFLAG_ACTIVE);
+ WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
+ WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
ata_sg_clean(qc);
qc->flags &= ~ATA_QCFLAG_ACTIVE;
/* call completion callback */
- rc = qc->complete_fn(qc);
-
- /* if callback indicates not to complete command (non-zero),
- * return immediately
- */
- if (rc != 0)
- return;
-
- __ata_qc_complete(qc);
-
- VPRINTK("EXIT\n");
+ qc->complete_fn(qc);
}
static inline int ata_should_dma_map(struct ata_queued_cmd *qc)
* spin_lock_irqsave(host_set lock)
*
* RETURNS:
- * Zero on success, negative on error.
+ * Zero on success, AC_ERR_* mask on failure
*/
-int ata_qc_issue(struct ata_queued_cmd *qc)
+unsigned int ata_qc_issue(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
if (ata_should_dma_map(qc)) {
if (qc->flags & ATA_QCFLAG_SG) {
if (ata_sg_setup(qc))
- goto err_out;
+ goto sg_err;
} else if (qc->flags & ATA_QCFLAG_SINGLE) {
if (ata_sg_setup_one(qc))
- goto err_out;
+ goto sg_err;
}
} else {
qc->flags &= ~ATA_QCFLAG_DMAMAP;
return ap->ops->qc_issue(qc);
-err_out:
- return -1;
+sg_err:
+ qc->flags &= ~ATA_QCFLAG_DMAMAP;
+ return AC_ERR_SYSTEM;
}
* spin_lock_irqsave(host_set lock)
*
* RETURNS:
- * Zero on success, negative on error.
+ * Zero on success, AC_ERR_* mask on failure
*/
-int ata_qc_issue_prot(struct ata_queued_cmd *qc)
+unsigned 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)
+ 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_queue_pio_task(ap);
+
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: /* load tf registers, initiate polling pio */
- ata_qc_set_polling(qc);
- ata_tf_to_host(ap, &qc->tf);
- ap->hsm_task_state = HSM_ST;
- queue_work(ata_wq, &ap->pio_task);
- break;
+ case ATA_PROT_PIO:
+ if (qc->tf.flags & ATA_TFLAG_POLLING)
+ ata_qc_set_polling(qc);
- case ATA_PROT_ATAPI:
- ata_qc_set_polling(qc);
ata_tf_to_host(ap, &qc->tf);
- queue_work(ata_wq, &ap->packet_task);
+
+ if (qc->tf.flags & ATA_TFLAG_WRITE) {
+ /* PIO data out protocol */
+ ap->hsm_task_state = HSM_ST_FIRST;
+ ata_queue_pio_task(ap);
+
+ /* 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_queue_pio_task(ap);
+
+ /* if polling, ata_pio_task() handles the rest.
+ * otherwise, interrupt handler takes over from here.
+ */
+ }
+
break;
+ case ATA_PROT_ATAPI:
case ATA_PROT_ATAPI_NODATA:
- ap->flags |= ATA_FLAG_NOINTR;
+ if (qc->tf.flags & ATA_TFLAG_POLLING)
+ ata_qc_set_polling(qc);
+
ata_tf_to_host(ap, &qc->tf);
- queue_work(ata_wq, &ap->packet_task);
+
+ 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_queue_pio_task(ap);
break;
case ATA_PROT_ATAPI_DMA:
- ap->flags |= ATA_FLAG_NOINTR;
+ 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 */
- queue_work(ata_wq, &ap->packet_task);
+ ap->hsm_task_state = HSM_ST_FIRST;
+
+ /* send cdb by polling if no cdb interrupt */
+ if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
+ ata_queue_pio_task(ap);
break;
default:
WARN_ON(1);
- return -1;
+ return AC_ERR_SYSTEM;
}
return 0;
inline unsigned int ata_host_intr (struct ata_port *ap,
struct ata_queued_cmd *qc)
{
- u8 status, host_stat;
+ u8 status, host_stat = 0;
- switch (qc->tf.protocol) {
-
- 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);
+ VPRINTK("ata%u: protocol %d task_state %d\n",
+ ap->id, qc->tf.protocol, ap->hsm_task_state);
- /* if it's not our irq... */
- if (!(host_stat & ATA_DMA_INTR))
+ /* Check whether we are expecting interrupt in this state */
+ switch (ap->hsm_task_state) {
+ case HSM_ST_FIRST:
+ /* 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))
goto idle_irq;
+ 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;
+ }
- /* before we do anything else, clear DMA-Start bit */
- ap->ops->bmdma_stop(qc);
+ /* check altstatus */
+ status = ata_altstatus(ap);
+ if (status & ATA_BUSY)
+ goto idle_irq;
- /* fall through */
+ /* check main status, clearing INTRQ */
+ status = ata_chk_status(ap);
+ if (unlikely(status & ATA_BUSY))
+ goto idle_irq;
- case ATA_PROT_ATAPI_NODATA:
- case ATA_PROT_NODATA:
- /* check altstatus */
- status = ata_altstatus(ap);
- if (status & ATA_BUSY)
- goto idle_irq;
+ DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
+ ap->id, qc->tf.protocol, ap->hsm_task_state, status);
- /* 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);
- /* ack bmdma irq events */
- ap->ops->irq_clear(ap);
+ /* check error */
+ if (unlikely(status & (ATA_ERR | ATA_DF))) {
+ qc->err_mask |= AC_ERR_DEV;
+ ap->hsm_task_state = HSM_ST_ERR;
+ }
+
+fsm_start:
+ switch (ap->hsm_task_state) {
+ case HSM_ST_FIRST:
+ /* Some pre-ATAPI-4 devices assert INTRQ
+ * at this state when ready to receive CDB.
+ */
+
+ /* check device status */
+ if (unlikely((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ)) {
+ /* Wrong status. Let EH handle this */
+ qc->err_mask |= AC_ERR_HSM;
+ ap->hsm_task_state = HSM_ST_ERR;
+ goto fsm_start;
+ }
+
+ atapi_send_cdb(ap, qc);
+
+ break;
+
+ 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 */
+ ap->hsm_task_state = HSM_ST_LAST;
+ goto fsm_start;
+ }
+
+ atapi_pio_bytes(qc);
+
+ if (unlikely(ap->hsm_task_state == HSM_ST_ERR))
+ /* bad ireason reported by device */
+ goto fsm_start;
+
+ } else {
+ /* ATA PIO protocol */
+ if (unlikely((status & ATA_DRQ) == 0)) {
+ /* handle BSY=0, DRQ=0 as error */
+ qc->err_mask |= AC_ERR_HSM;
+ ap->hsm_task_state = HSM_ST_ERR;
+ goto fsm_start;
+ }
+
+ ata_pio_sectors(qc);
+
+ if (ap->hsm_task_state == HSM_ST_LAST &&
+ (!(qc->tf.flags & ATA_TFLAG_WRITE))) {
+ /* all data read */
+ ata_altstatus(ap);
+ status = ata_chk_status(ap);
+ goto fsm_start;
+ }
+ }
+
+ ata_altstatus(ap); /* flush */
+ break;
+
+ case HSM_ST_LAST:
+ if (unlikely(status & ATA_DRQ)) {
+ /* handle DRQ=1 as error */
+ qc->err_mask |= AC_ERR_HSM;
+ ap->hsm_task_state = HSM_ST_ERR;
+ goto fsm_start;
+ }
+
+ /* no more data to transfer */
+ DPRINTK("ata%u: command complete, drv_stat 0x%x\n",
+ ap->id, status);
+
+ ap->hsm_task_state = HSM_ST_IDLE;
/* complete taskfile transaction */
qc->err_mask |= ac_err_mask(status);
ata_qc_complete(qc);
break;
+ case HSM_ST_ERR:
+ if (qc->tf.command != ATA_CMD_PACKET)
+ printk(KERN_ERR "ata%u: command error, drv_stat 0x%x host_stat 0x%x\n",
+ ap->id, status, host_stat);
+
+ /* make sure qc->err_mask is available to
+ * know what's wrong and recover
+ */
+ WARN_ON(qc->err_mask == 0);
+
+ ap->hsm_task_state = HSM_ST_IDLE;
+ ata_qc_complete(qc);
+ break;
default:
goto idle_irq;
}
ap = host_set->ports[i];
if (ap &&
- !(ap->flags & (ATA_FLAG_PORT_DISABLED | ATA_FLAG_NOINTR))) {
+ !(ap->flags & ATA_FLAG_PORT_DISABLED)) {
struct ata_queued_cmd *qc;
qc = ata_qc_from_tag(ap, ap->active_tag);
- if (qc && (!(qc->tf.ctl & ATA_NIEN)) &&
+ if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) &&
(qc->flags & ATA_QCFLAG_ACTIVE))
handled |= ata_host_intr(ap, qc);
}
return IRQ_RETVAL(handled);
}
-/**
- * atapi_packet_task - Write CDB bytes to hardware
- * @_data: Port to which ATAPI device is attached.
- *
- * When device has indicated its readiness to accept
- * a CDB, this function is called. Send the CDB.
- * If DMA is to be performed, exit immediately.
- * Otherwise, we are in polling mode, so poll
- * status under operation succeeds or fails.
- *
- * LOCKING:
- * Kernel thread context (may sleep)
- */
-
-static void atapi_packet_task(void *_data)
-{
- struct ata_port *ap = _data;
- struct ata_queued_cmd *qc;
- u8 status;
-
- qc = ata_qc_from_tag(ap, ap->active_tag);
- assert(qc != NULL);
- assert(qc->flags & ATA_QCFLAG_ACTIVE);
-
- /* sleep-wait for BSY to clear */
- DPRINTK("busy wait\n");
- if (ata_busy_sleep(ap, ATA_TMOUT_CDB_QUICK, ATA_TMOUT_CDB)) {
- qc->err_mask |= AC_ERR_ATA_BUS;
- goto err_out;
- }
-
- /* make sure DRQ is set */
- status = ata_chk_status(ap);
- if ((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ) {
- qc->err_mask |= AC_ERR_ATA_BUS;
- goto err_out;
- }
-
- /* send SCSI cdb */
- DPRINTK("send cdb\n");
- assert(ap->cdb_len >= 12);
-
- if (qc->tf.protocol == ATA_PROT_ATAPI_DMA ||
- qc->tf.protocol == ATA_PROT_ATAPI_NODATA) {
- unsigned long flags;
-
- /* Once we're done issuing command and kicking bmdma,
- * irq handler takes over. To not lose irq, we need
- * to clear NOINTR flag before sending cdb, but
- * interrupt handler shouldn't be invoked before we're
- * finished. Hence, the following locking.
- */
- spin_lock_irqsave(&ap->host_set->lock, flags);
- ap->flags &= ~ATA_FLAG_NOINTR;
- ata_data_xfer(ap, qc->cdb, ap->cdb_len, 1);
- if (qc->tf.protocol == ATA_PROT_ATAPI_DMA)
- ap->ops->bmdma_start(qc); /* initiate bmdma */
- spin_unlock_irqrestore(&ap->host_set->lock, flags);
- } else {
- ata_data_xfer(ap, qc->cdb, ap->cdb_len, 1);
-
- /* PIO commands are handled by polling */
- ap->hsm_task_state = HSM_ST;
- queue_work(ata_wq, &ap->pio_task);
- }
-
- return;
-
-err_out:
- ata_poll_qc_complete(qc);
-}
-
-
-/**
- * ata_port_start - Set port up for dma.
- * @ap: Port to initialize
- *
- * Called just after data structures for each port are
- * initialized. Allocates space for PRD table.
- *
- * May be used as the port_start() entry in ata_port_operations.
- *
- * LOCKING:
- * Inherited from caller.
- */
-
/*
* Execute a 'simple' command, that only consists of the opcode 'cmd' itself,
* without filling any other registers
/**
* ata_device_resume - wakeup a previously suspended devices
+ * @ap: port the device is connected to
+ * @dev: the device to resume
*
* Kick the drive back into action, by sending it an idle immediate
* command and making sure its transfer mode matches between drive
/**
* ata_device_suspend - prepare a device for suspend
+ * @ap: port the device is connected to
+ * @dev: the device to suspend
*
* Flush the cache on the drive, if appropriate, then issue a
* standbynow command.
- *
*/
int ata_device_suspend(struct ata_port *ap, struct ata_device *dev)
{
return 0;
}
+/**
+ * ata_port_start - Set port up for dma.
+ * @ap: Port to initialize
+ *
+ * Called just after data structures for each port are
+ * initialized. Allocates space for PRD table.
+ *
+ * May be used as the port_start() entry in ata_port_operations.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ */
+
int ata_port_start (struct ata_port *ap)
{
struct device *dev = ap->host_set->dev;
ap->active_tag = ATA_TAG_POISON;
ap->last_ctl = 0xFF;
- INIT_WORK(&ap->packet_task, atapi_packet_task, ap);
INIT_WORK(&ap->pio_task, ata_pio_task, ap);
+ INIT_LIST_HEAD(&ap->eh_done_q);
for (i = 0; i < ATA_MAX_DEVICES; i++)
ap->device[i].devno = i;
ap = host_set->ports[i];
- DPRINTK("ata%u: probe begin\n", ap->id);
+ DPRINTK("ata%u: bus probe begin\n", ap->id);
rc = ata_bus_probe(ap);
- DPRINTK("ata%u: probe end\n", ap->id);
+ DPRINTK("ata%u: bus probe end\n", ap->id);
if (rc) {
/* FIXME: do something useful here?
}
/* probes are done, now scan each port's disk(s) */
- DPRINTK("probe begin\n");
+ DPRINTK("host probe begin\n");
for (i = 0; i < count; i++) {
struct ata_port *ap = host_set->ports[i];
ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD;
}
-static struct ata_probe_ent *
-ata_probe_ent_alloc(struct device *dev, const struct ata_port_info *port)
-{
- struct ata_probe_ent *probe_ent;
-
- probe_ent = kzalloc(sizeof(*probe_ent), GFP_KERNEL);
- if (!probe_ent) {
- printk(KERN_ERR DRV_NAME "(%s): out of memory\n",
- kobject_name(&(dev->kobj)));
- return NULL;
- }
-
- INIT_LIST_HEAD(&probe_ent->node);
- probe_ent->dev = dev;
-
- probe_ent->sht = port->sht;
- probe_ent->host_flags = port->host_flags;
- probe_ent->pio_mask = port->pio_mask;
- probe_ent->mwdma_mask = port->mwdma_mask;
- probe_ent->udma_mask = port->udma_mask;
- probe_ent->port_ops = port->port_ops;
-
- return probe_ent;
-}
-
-
#ifdef CONFIG_PCI
pci_iounmap(pdev, host_set->mmio_base);
}
-/**
- * ata_pci_init_native_mode - Initialize native-mode driver
- * @pdev: pci device to be initialized
- * @port: array[2] of pointers to port info structures.
- * @ports: bitmap of ports present
- *
- * Utility function which allocates and initializes an
- * ata_probe_ent structure for a standard dual-port
- * PIO-based IDE controller. The returned ata_probe_ent
- * structure can be passed to ata_device_add(). The returned
- * ata_probe_ent structure should then be freed with kfree().
- *
- * The caller need only pass the address of the primary port, the
- * secondary will be deduced automatically. If the device has non
- * standard secondary port mappings this function can be called twice,
- * once for each interface.
- */
-
-struct ata_probe_ent *
-ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int ports)
-{
- struct ata_probe_ent *probe_ent =
- ata_probe_ent_alloc(pci_dev_to_dev(pdev), port[0]);
- int p = 0;
-
- if (!probe_ent)
- return NULL;
-
- probe_ent->irq = pdev->irq;
- probe_ent->irq_flags = SA_SHIRQ;
- probe_ent->private_data = port[0]->private_data;
-
- if (ports & ATA_PORT_PRIMARY) {
- probe_ent->port[p].cmd_addr = pci_resource_start(pdev, 0);
- probe_ent->port[p].altstatus_addr =
- probe_ent->port[p].ctl_addr =
- pci_resource_start(pdev, 1) | ATA_PCI_CTL_OFS;
- probe_ent->port[p].bmdma_addr = pci_resource_start(pdev, 4);
- ata_std_ports(&probe_ent->port[p]);
- p++;
- }
-
- if (ports & ATA_PORT_SECONDARY) {
- probe_ent->port[p].cmd_addr = pci_resource_start(pdev, 2);
- probe_ent->port[p].altstatus_addr =
- probe_ent->port[p].ctl_addr =
- pci_resource_start(pdev, 3) | ATA_PCI_CTL_OFS;
- probe_ent->port[p].bmdma_addr = pci_resource_start(pdev, 4) + 8;
- ata_std_ports(&probe_ent->port[p]);
- p++;
- }
-
- probe_ent->n_ports = p;
- return probe_ent;
-}
-
-static struct ata_probe_ent *ata_pci_init_legacy_port(struct pci_dev *pdev, struct ata_port_info *port, int port_num)
-{
- struct ata_probe_ent *probe_ent;
-
- probe_ent = ata_probe_ent_alloc(pci_dev_to_dev(pdev), port);
- if (!probe_ent)
- return NULL;
-
- probe_ent->legacy_mode = 1;
- probe_ent->n_ports = 1;
- probe_ent->hard_port_no = port_num;
- probe_ent->private_data = port->private_data;
-
- switch(port_num)
- {
- case 0:
- probe_ent->irq = 14;
- probe_ent->port[0].cmd_addr = 0x1f0;
- probe_ent->port[0].altstatus_addr =
- probe_ent->port[0].ctl_addr = 0x3f6;
- break;
- case 1:
- probe_ent->irq = 15;
- probe_ent->port[0].cmd_addr = 0x170;
- probe_ent->port[0].altstatus_addr =
- probe_ent->port[0].ctl_addr = 0x376;
- break;
- }
- probe_ent->port[0].bmdma_addr = pci_resource_start(pdev, 4) + 8 * port_num;
- ata_std_ports(&probe_ent->port[0]);
- return probe_ent;
-}
-
-/**
- * ata_pci_init_one - Initialize/register PCI IDE host controller
- * @pdev: Controller to be initialized
- * @port_info: Information from low-level host driver
- * @n_ports: Number of ports attached to host controller
- *
- * This is a helper function which can be called from a driver's
- * xxx_init_one() probe function if the hardware uses traditional
- * IDE taskfile registers.
- *
- * This function calls pci_enable_device(), reserves its register
- * regions, sets the dma mask, enables bus master mode, and calls
- * ata_device_add()
- *
- * LOCKING:
- * Inherited from PCI layer (may sleep).
- *
- * RETURNS:
- * Zero on success, negative on errno-based value on error.
- */
-
-int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
- unsigned int n_ports)
-{
- struct ata_probe_ent *probe_ent = NULL, *probe_ent2 = NULL;
- struct ata_port_info *port[2];
- u8 tmp8, mask;
- unsigned int legacy_mode = 0;
- int disable_dev_on_err = 1;
- int rc;
-
- DPRINTK("ENTER\n");
-
- port[0] = port_info[0];
- if (n_ports > 1)
- port[1] = port_info[1];
- else
- port[1] = port[0];
-
- if ((port[0]->host_flags & ATA_FLAG_NO_LEGACY) == 0
- && (pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) {
- /* TODO: What if one channel is in native mode ... */
- pci_read_config_byte(pdev, PCI_CLASS_PROG, &tmp8);
- mask = (1 << 2) | (1 << 0);
- if ((tmp8 & mask) != mask)
- legacy_mode = (1 << 3);
- }
-
- /* FIXME... */
- if ((!legacy_mode) && (n_ports > 2)) {
- printk(KERN_ERR "ata: BUG: native mode, n_ports > 2\n");
- n_ports = 2;
- /* For now */
- }
-
- /* FIXME: Really for ATA it isn't safe because the device may be
- multi-purpose and we want to leave it alone if it was already
- enabled. Secondly for shared use as Arjan says we want refcounting
-
- Checking dev->is_enabled is insufficient as this is not set at
- boot for the primary video which is BIOS enabled
- */
-
- rc = pci_enable_device(pdev);
- if (rc)
- return rc;
-
- rc = pci_request_regions(pdev, DRV_NAME);
- if (rc) {
- disable_dev_on_err = 0;
- goto err_out;
- }
-
- /* FIXME: Should use platform specific mappers for legacy port ranges */
- if (legacy_mode) {
- if (!request_region(0x1f0, 8, "libata")) {
- struct resource *conflict, res;
- res.start = 0x1f0;
- res.end = 0x1f0 + 8 - 1;
- conflict = ____request_resource(&ioport_resource, &res);
- if (!strcmp(conflict->name, "libata"))
- legacy_mode |= (1 << 0);
- else {
- disable_dev_on_err = 0;
- printk(KERN_WARNING "ata: 0x1f0 IDE port busy\n");
- }
- } else
- legacy_mode |= (1 << 0);
-
- if (!request_region(0x170, 8, "libata")) {
- struct resource *conflict, res;
- res.start = 0x170;
- res.end = 0x170 + 8 - 1;
- conflict = ____request_resource(&ioport_resource, &res);
- if (!strcmp(conflict->name, "libata"))
- legacy_mode |= (1 << 1);
- else {
- disable_dev_on_err = 0;
- printk(KERN_WARNING "ata: 0x170 IDE port busy\n");
- }
- } else
- legacy_mode |= (1 << 1);
- }
-
- /* we have legacy mode, but all ports are unavailable */
- if (legacy_mode == (1 << 3)) {
- rc = -EBUSY;
- goto err_out_regions;
- }
-
- rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
- if (rc)
- goto err_out_regions;
- rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
- if (rc)
- goto err_out_regions;
-
- if (legacy_mode) {
- if (legacy_mode & (1 << 0))
- probe_ent = ata_pci_init_legacy_port(pdev, port[0], 0);
- if (legacy_mode & (1 << 1))
- probe_ent2 = ata_pci_init_legacy_port(pdev, port[1], 1);
- } else {
- if (n_ports == 2)
- probe_ent = ata_pci_init_native_mode(pdev, port, ATA_PORT_PRIMARY | ATA_PORT_SECONDARY);
- else
- probe_ent = ata_pci_init_native_mode(pdev, port, ATA_PORT_PRIMARY);
- }
- if (!probe_ent && !probe_ent2) {
- rc = -ENOMEM;
- goto err_out_regions;
- }
-
- pci_set_master(pdev);
-
- /* FIXME: check ata_device_add return */
- if (legacy_mode) {
- if (legacy_mode & (1 << 0))
- ata_device_add(probe_ent);
- if (legacy_mode & (1 << 1))
- ata_device_add(probe_ent2);
- } else
- ata_device_add(probe_ent);
-
- kfree(probe_ent);
- kfree(probe_ent2);
-
- return 0;
-
-err_out_regions:
- if (legacy_mode & (1 << 0))
- release_region(0x1f0, 8);
- if (legacy_mode & (1 << 1))
- release_region(0x170, 8);
- pci_release_regions(pdev);
-err_out:
- if (disable_dev_on_err)
- pci_disable_device(pdev);
- return rc;
-}
-
/**
* ata_pci_remove_one - PCI layer callback for device removal
* @pdev: PCI device that was removed
EXPORT_SYMBOL_GPL(ata_host_set_remove);
EXPORT_SYMBOL_GPL(ata_sg_init);
EXPORT_SYMBOL_GPL(ata_sg_init_one);
-EXPORT_SYMBOL_GPL(ata_qc_complete);
+EXPORT_SYMBOL_GPL(__ata_qc_complete);
EXPORT_SYMBOL_GPL(ata_qc_issue_prot);
EXPORT_SYMBOL_GPL(ata_eng_timeout);
EXPORT_SYMBOL_GPL(ata_tf_load);
EXPORT_SYMBOL_GPL(sata_phy_reset);
EXPORT_SYMBOL_GPL(__sata_phy_reset);
EXPORT_SYMBOL_GPL(ata_bus_reset);
+EXPORT_SYMBOL_GPL(ata_std_probeinit);
+EXPORT_SYMBOL_GPL(ata_std_softreset);
+EXPORT_SYMBOL_GPL(sata_std_hardreset);
+EXPORT_SYMBOL_GPL(ata_std_postreset);
+EXPORT_SYMBOL_GPL(ata_std_probe_reset);
+EXPORT_SYMBOL_GPL(ata_drive_probe_reset);
EXPORT_SYMBOL_GPL(ata_port_disable);
EXPORT_SYMBOL_GPL(ata_ratelimit);
+EXPORT_SYMBOL_GPL(ata_busy_sleep);
EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
+EXPORT_SYMBOL_GPL(ata_scsi_timed_out);
EXPORT_SYMBOL_GPL(ata_scsi_error);
EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
EXPORT_SYMBOL_GPL(ata_scsi_release);
EXPORT_SYMBOL_GPL(ata_host_intr);
EXPORT_SYMBOL_GPL(ata_dev_classify);
-EXPORT_SYMBOL_GPL(ata_dev_id_string);
+EXPORT_SYMBOL_GPL(ata_id_string);
+EXPORT_SYMBOL_GPL(ata_id_c_string);
EXPORT_SYMBOL_GPL(ata_dev_config);
EXPORT_SYMBOL_GPL(ata_scsi_simulate);
+EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
+EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
EXPORT_SYMBOL_GPL(ata_timing_compute);
git.samba.org / sfrench / cifs-2.6.git / blobdiff