* Copyright (C) 2006 Randy Dunlap
*/
+#include <linux/module.h>
#include <linux/ata.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <acpi/acmacros.h>
#include <acpi/actypes.h>
+enum {
+ ATA_ACPI_FILTER_SETXFER = 1 << 0,
+ ATA_ACPI_FILTER_LOCK = 1 << 1,
+
+ ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER |
+ ATA_ACPI_FILTER_LOCK,
+};
+
+static unsigned int ata_acpi_gtf_filter = ATA_ACPI_FILTER_DEFAULT;
+module_param_named(acpi_gtf_filter, ata_acpi_gtf_filter, int, 0644);
+MODULE_PARM_DESC(acpi_gtf_filter, "filter mask for ACPI _GTF commands, set to filter out (0x1=set xfermode, 0x2=lock/freeze lock)");
+
#define NO_PORT_MULT 0xffff
#define SATA_ADR(root, pmp) (((root) << 16) | (pmp))
return (dev->bus == &pci_bus_type);
}
+static void ata_acpi_clear_gtf(struct ata_device *dev)
+{
+ kfree(dev->gtf_cache);
+ dev->gtf_cache = NULL;
+}
+
/**
* ata_acpi_associate_sata_port - associate SATA port with ACPI objects
* @ap: target SATA port
dev->acpi_handle = acpi_get_child(ap->acpi_handle, i);
}
+
+ if (ata_acpi_gtm(ap, &ap->__acpi_init_gtm) == 0)
+ ap->pflags |= ATA_PFLAG_INIT_GTM_VALID;
}
-static void ata_acpi_handle_hotplug(struct ata_port *ap, struct kobject *kobj,
+static void ata_acpi_handle_hotplug(struct ata_port *ap, struct ata_device *dev,
u32 event)
{
char event_string[12];
char *envp[] = { event_string, NULL };
- struct ata_eh_info *ehi = &ap->link.eh_info;
-
- if (event == 0 || event == 1) {
- unsigned long flags;
- spin_lock_irqsave(ap->lock, flags);
- ata_ehi_clear_desc(ehi);
- ata_ehi_push_desc(ehi, "ACPI event");
- ata_ehi_hotplugged(ehi);
- ata_port_freeze(ap);
- spin_unlock_irqrestore(ap->lock, flags);
+ struct ata_eh_info *ehi;
+ struct kobject *kobj = NULL;
+ int wait = 0;
+ unsigned long flags;
+
+ if (!ap)
+ ap = dev->link->ap;
+ ehi = &ap->link.eh_info;
+
+ spin_lock_irqsave(ap->lock, flags);
+
+ switch (event) {
+ case ACPI_NOTIFY_BUS_CHECK:
+ case ACPI_NOTIFY_DEVICE_CHECK:
+ ata_ehi_push_desc(ehi, "ACPI event");
+ ata_ehi_hotplugged(ehi);
+ ata_port_freeze(ap);
+ break;
+
+ case ACPI_NOTIFY_EJECT_REQUEST:
+ ata_ehi_push_desc(ehi, "ACPI event");
+ if (dev)
+ dev->flags |= ATA_DFLAG_DETACH;
+ else {
+ struct ata_link *tlink;
+ struct ata_device *tdev;
+
+ ata_port_for_each_link(tlink, ap)
+ ata_link_for_each_dev(tdev, tlink)
+ tdev->flags |= ATA_DFLAG_DETACH;
+ }
+
+ ata_port_schedule_eh(ap);
+ wait = 1;
+ break;
}
+ if (dev) {
+ if (dev->sdev)
+ kobj = &dev->sdev->sdev_gendev.kobj;
+ } else
+ kobj = &ap->dev->kobj;
+
if (kobj) {
sprintf(event_string, "BAY_EVENT=%d", event);
kobject_uevent_env(kobj, KOBJ_CHANGE, envp);
}
+
+ spin_unlock_irqrestore(ap->lock, flags);
+
+ if (wait)
+ ata_port_wait_eh(ap);
}
static void ata_acpi_dev_notify(acpi_handle handle, u32 event, void *data)
{
struct ata_device *dev = data;
- struct kobject *kobj = NULL;
-
- if (dev->sdev)
- kobj = &dev->sdev->sdev_gendev.kobj;
- ata_acpi_handle_hotplug(dev->link->ap, kobj, event);
+ ata_acpi_handle_hotplug(NULL, dev, event);
}
static void ata_acpi_ap_notify(acpi_handle handle, u32 event, void *data)
{
struct ata_port *ap = data;
- ata_acpi_handle_hotplug(ap, &ap->dev->kobj, event);
+ ata_acpi_handle_hotplug(ap, NULL, event);
}
/**
else
ata_acpi_associate_ide_port(ap);
- if (ap->acpi_handle)
- acpi_install_notify_handler (ap->acpi_handle,
- ACPI_SYSTEM_NOTIFY,
- ata_acpi_ap_notify,
- ap);
+ if (ap->acpi_handle) {
+ acpi_install_notify_handler(ap->acpi_handle,
+ ACPI_SYSTEM_NOTIFY,
+ ata_acpi_ap_notify, ap);
+#if defined(CONFIG_ACPI_DOCK) || defined(CONFIG_ACPI_DOCK_MODULE)
+ /* we might be on a docking station */
+ register_hotplug_dock_device(ap->acpi_handle,
+ ata_acpi_ap_notify, ap);
+#endif
+ }
for (j = 0; j < ata_link_max_devices(&ap->link); j++) {
struct ata_device *dev = &ap->link.device[j];
- if (dev->acpi_handle)
- acpi_install_notify_handler (dev->acpi_handle,
- ACPI_SYSTEM_NOTIFY,
- ata_acpi_dev_notify,
- dev);
+ if (dev->acpi_handle) {
+ acpi_install_notify_handler(dev->acpi_handle,
+ ACPI_SYSTEM_NOTIFY,
+ ata_acpi_dev_notify, dev);
+#if defined(CONFIG_ACPI_DOCK) || defined(CONFIG_ACPI_DOCK_MODULE)
+ /* we might be on a docking station */
+ register_hotplug_dock_device(dev->acpi_handle,
+ ata_acpi_dev_notify, dev);
+#endif
+ }
}
}
}
+/**
+ * ata_acpi_dissociate - dissociate ATA host from ACPI objects
+ * @host: target ATA host
+ *
+ * This function is called during driver detach after the whole host
+ * is shut down.
+ *
+ * LOCKING:
+ * EH context.
+ */
+void ata_acpi_dissociate(struct ata_host *host)
+{
+ int i;
+
+ /* Restore initial _GTM values so that driver which attaches
+ * afterward can use them too.
+ */
+ for (i = 0; i < host->n_ports; i++) {
+ struct ata_port *ap = host->ports[i];
+ const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap);
+
+ if (ap->acpi_handle && gtm)
+ ata_acpi_stm(ap, gtm);
+ }
+}
+
/**
* ata_acpi_gtm - execute _GTM
* @ap: target ATA port
* RETURNS:
* 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure.
*/
-int ata_acpi_gtm(const struct ata_port *ap, struct ata_acpi_gtm *gtm)
+int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm)
{
struct acpi_buffer output = { .length = ACPI_ALLOCATE_BUFFER };
union acpi_object *out_obj;
* RETURNS:
* 0 on success, -ENOENT if _STM doesn't exist, -errno on failure.
*/
-int ata_acpi_stm(const struct ata_port *ap, struct ata_acpi_gtm *stm)
+int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm)
{
acpi_status status;
+ struct ata_acpi_gtm stm_buf = *stm;
struct acpi_object_list input;
union acpi_object in_params[3];
in_params[0].type = ACPI_TYPE_BUFFER;
in_params[0].buffer.length = sizeof(struct ata_acpi_gtm);
- in_params[0].buffer.pointer = (u8 *)stm;
+ in_params[0].buffer.pointer = (u8 *)&stm_buf;
/* Buffers for id may need byteswapping ? */
in_params[1].type = ACPI_TYPE_BUFFER;
in_params[1].buffer.length = 512;
* ata_dev_get_GTF - get the drive bootup default taskfile settings
* @dev: target ATA device
* @gtf: output parameter for buffer containing _GTF taskfile arrays
- * @ptr_to_free: pointer which should be freed
*
* This applies to both PATA and SATA drives.
*
* EH context.
*
* RETURNS:
- * Number of taskfiles on success, 0 if _GTF doesn't exist or doesn't
- * contain valid data.
+ * Number of taskfiles on success, 0 if _GTF doesn't exist. -EINVAL
+ * if _GTF is invalid.
*/
-static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf,
- void **ptr_to_free)
+static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf)
{
struct ata_port *ap = dev->link->ap;
acpi_status status;
union acpi_object *out_obj;
int rc = 0;
+ /* if _GTF is cached, use the cached value */
+ if (dev->gtf_cache) {
+ out_obj = dev->gtf_cache;
+ goto done;
+ }
+
/* set up output buffer */
output.length = ACPI_ALLOCATE_BUFFER;
output.pointer = NULL; /* ACPI-CA sets this; save/free it later */
if (ata_msg_probe(ap))
ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER: port#: %d\n",
- __FUNCTION__, ap->port_no);
+ __func__, ap->port_no);
/* _GTF has no input parameters */
status = acpi_evaluate_object(dev->acpi_handle, "_GTF", NULL, &output);
+ out_obj = dev->gtf_cache = output.pointer;
if (ACPI_FAILURE(status)) {
if (status != AE_NOT_FOUND) {
ata_dev_printk(dev, KERN_WARNING,
"_GTF evaluation failed (AE 0x%x)\n",
status);
+ rc = -EINVAL;
}
goto out_free;
}
if (ata_msg_probe(ap))
ata_dev_printk(dev, KERN_DEBUG, "%s: Run _GTF: "
"length or ptr is NULL (0x%llx, 0x%p)\n",
- __FUNCTION__,
+ __func__,
(unsigned long long)output.length,
output.pointer);
+ rc = -EINVAL;
goto out_free;
}
- out_obj = output.pointer;
if (out_obj->type != ACPI_TYPE_BUFFER) {
ata_dev_printk(dev, KERN_WARNING,
"_GTF unexpected object type 0x%x\n",
out_obj->type);
+ rc = -EINVAL;
goto out_free;
}
ata_dev_printk(dev, KERN_WARNING,
"unexpected _GTF length (%d)\n",
out_obj->buffer.length);
+ rc = -EINVAL;
goto out_free;
}
- *ptr_to_free = out_obj;
- *gtf = (void *)out_obj->buffer.pointer;
+ done:
rc = out_obj->buffer.length / REGS_PER_GTF;
-
- if (ata_msg_probe(ap))
- ata_dev_printk(dev, KERN_DEBUG, "%s: returning "
- "gtf=%p, gtf_count=%d, ptr_to_free=%p\n",
- __FUNCTION__, *gtf, rc, *ptr_to_free);
+ if (gtf) {
+ *gtf = (void *)out_obj->buffer.pointer;
+ if (ata_msg_probe(ap))
+ ata_dev_printk(dev, KERN_DEBUG,
+ "%s: returning gtf=%p, gtf_count=%d\n",
+ __func__, *gtf, rc);
+ }
return rc;
out_free:
- kfree(output.pointer);
+ ata_acpi_clear_gtf(dev);
return rc;
}
+/**
+ * ata_acpi_gtm_xfermode - determine xfermode from GTM parameter
+ * @dev: target device
+ * @gtm: GTM parameter to use
+ *
+ * Determine xfermask for @dev from @gtm.
+ *
+ * LOCKING:
+ * None.
+ *
+ * RETURNS:
+ * Determined xfermask.
+ */
+unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
+ const struct ata_acpi_gtm *gtm)
+{
+ unsigned long xfer_mask = 0;
+ unsigned int type;
+ int unit;
+ u8 mode;
+
+ /* we always use the 0 slot for crap hardware */
+ unit = dev->devno;
+ if (!(gtm->flags & 0x10))
+ unit = 0;
+
+ /* PIO */
+ mode = ata_timing_cycle2mode(ATA_SHIFT_PIO, gtm->drive[unit].pio);
+ xfer_mask |= ata_xfer_mode2mask(mode);
+
+ /* See if we have MWDMA or UDMA data. We don't bother with
+ * MWDMA if UDMA is available as this means the BIOS set UDMA
+ * and our error changedown if it works is UDMA to PIO anyway.
+ */
+ if (!(gtm->flags & (1 << (2 * unit))))
+ type = ATA_SHIFT_MWDMA;
+ else
+ type = ATA_SHIFT_UDMA;
+
+ mode = ata_timing_cycle2mode(type, gtm->drive[unit].dma);
+ xfer_mask |= ata_xfer_mode2mask(mode);
+
+ return xfer_mask;
+}
+EXPORT_SYMBOL_GPL(ata_acpi_gtm_xfermask);
+
/**
* ata_acpi_cbl_80wire - Check for 80 wire cable
* @ap: Port to check
+ * @gtm: GTM data to use
*
- * Return 1 if the ACPI mode data for this port indicates the BIOS selected
- * an 80wire mode.
+ * Return 1 if the @gtm indicates the BIOS selected an 80wire mode.
*/
-
-int ata_acpi_cbl_80wire(struct ata_port *ap)
+int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm)
{
- struct ata_acpi_gtm gtm;
- int valid = 0;
+ struct ata_device *dev;
- /* No _GTM data, no information */
- if (ata_acpi_gtm(ap, >m) < 0)
- return 0;
+ ata_link_for_each_dev(dev, &ap->link) {
+ unsigned long xfer_mask, udma_mask;
+
+ if (!ata_dev_enabled(dev))
+ continue;
+
+ xfer_mask = ata_acpi_gtm_xfermask(dev, gtm);
+ ata_unpack_xfermask(xfer_mask, NULL, NULL, &udma_mask);
+
+ if (udma_mask & ~ATA_UDMA_MASK_40C)
+ return 1;
+ }
- /* Split timing, DMA enabled */
- if ((gtm.flags & 0x11) == 0x11 && gtm.drive[0].dma < 55)
- valid |= 1;
- if ((gtm.flags & 0x14) == 0x14 && gtm.drive[1].dma < 55)
- valid |= 2;
- /* Shared timing, DMA enabled */
- if ((gtm.flags & 0x11) == 0x01 && gtm.drive[0].dma < 55)
- valid |= 1;
- if ((gtm.flags & 0x14) == 0x04 && gtm.drive[0].dma < 55)
- valid |= 2;
-
- /* Drive check */
- if ((valid & 1) && ata_dev_enabled(&ap->link.device[0]))
- return 1;
- if ((valid & 2) && ata_dev_enabled(&ap->link.device[1]))
- return 1;
return 0;
}
-
EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire);
+static void ata_acpi_gtf_to_tf(struct ata_device *dev,
+ const struct ata_acpi_gtf *gtf,
+ struct ata_taskfile *tf)
+{
+ ata_tf_init(dev, tf);
+
+ tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
+ tf->protocol = ATA_PROT_NODATA;
+ tf->feature = gtf->tf[0]; /* 0x1f1 */
+ tf->nsect = gtf->tf[1]; /* 0x1f2 */
+ tf->lbal = gtf->tf[2]; /* 0x1f3 */
+ tf->lbam = gtf->tf[3]; /* 0x1f4 */
+ tf->lbah = gtf->tf[4]; /* 0x1f5 */
+ tf->device = gtf->tf[5]; /* 0x1f6 */
+ tf->command = gtf->tf[6]; /* 0x1f7 */
+}
+
+static int ata_acpi_filter_tf(const struct ata_taskfile *tf,
+ const struct ata_taskfile *ptf)
+{
+ if (ata_acpi_gtf_filter & ATA_ACPI_FILTER_SETXFER) {
+ /* libata doesn't use ACPI to configure transfer mode.
+ * It will only confuse device configuration. Skip.
+ */
+ if (tf->command == ATA_CMD_SET_FEATURES &&
+ tf->feature == SETFEATURES_XFER)
+ return 1;
+ }
+
+ if (ata_acpi_gtf_filter & ATA_ACPI_FILTER_LOCK) {
+ /* BIOS writers, sorry but we don't wanna lock
+ * features unless the user explicitly said so.
+ */
+
+ /* DEVICE CONFIGURATION FREEZE LOCK */
+ if (tf->command == ATA_CMD_CONF_OVERLAY &&
+ tf->feature == ATA_DCO_FREEZE_LOCK)
+ return 1;
+
+ /* SECURITY FREEZE LOCK */
+ if (tf->command == ATA_CMD_SEC_FREEZE_LOCK)
+ return 1;
+
+ /* SET MAX LOCK and SET MAX FREEZE LOCK */
+ if ((!ptf || ptf->command != ATA_CMD_READ_NATIVE_MAX) &&
+ tf->command == ATA_CMD_SET_MAX &&
+ (tf->feature == ATA_SET_MAX_LOCK ||
+ tf->feature == ATA_SET_MAX_FREEZE_LOCK))
+ return 1;
+ }
+
+ return 0;
+}
+
/**
- * taskfile_load_raw - send taskfile registers to host controller
+ * ata_acpi_run_tf - send taskfile registers to host controller
* @dev: target ATA device
* @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7)
*
* EH context.
*
* RETURNS:
- * 0 on success, -errno on failure.
+ * 1 if command is executed successfully. 0 if ignored, rejected or
+ * filtered out, -errno on other errors.
*/
-static int taskfile_load_raw(struct ata_device *dev,
- const struct ata_acpi_gtf *gtf)
+static int ata_acpi_run_tf(struct ata_device *dev,
+ const struct ata_acpi_gtf *gtf,
+ const struct ata_acpi_gtf *prev_gtf)
{
- struct ata_port *ap = dev->link->ap;
- struct ata_taskfile tf, rtf;
+ struct ata_taskfile *pptf = NULL;
+ struct ata_taskfile tf, ptf, rtf;
unsigned int err_mask;
+ const char *level;
+ char msg[60];
+ int rc;
if ((gtf->tf[0] == 0) && (gtf->tf[1] == 0) && (gtf->tf[2] == 0)
&& (gtf->tf[3] == 0) && (gtf->tf[4] == 0) && (gtf->tf[5] == 0)
&& (gtf->tf[6] == 0))
return 0;
- ata_tf_init(dev, &tf);
+ ata_acpi_gtf_to_tf(dev, gtf, &tf);
+ if (prev_gtf) {
+ ata_acpi_gtf_to_tf(dev, prev_gtf, &ptf);
+ pptf = &ptf;
+ }
- /* convert gtf to tf */
- tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; /* TBD */
- tf.protocol = ATA_PROT_NODATA;
- tf.feature = gtf->tf[0]; /* 0x1f1 */
- tf.nsect = gtf->tf[1]; /* 0x1f2 */
- tf.lbal = gtf->tf[2]; /* 0x1f3 */
- tf.lbam = gtf->tf[3]; /* 0x1f4 */
- tf.lbah = gtf->tf[4]; /* 0x1f5 */
- tf.device = gtf->tf[5]; /* 0x1f6 */
- tf.command = gtf->tf[6]; /* 0x1f7 */
+ if (!ata_acpi_filter_tf(&tf, pptf)) {
+ rtf = tf;
+ err_mask = ata_exec_internal(dev, &rtf, NULL,
+ DMA_NONE, NULL, 0, 0);
- if (ata_msg_probe(ap))
- ata_dev_printk(dev, KERN_DEBUG, "executing ACPI cmd "
- "%02x/%02x:%02x:%02x:%02x:%02x:%02x\n",
- tf.command, tf.feature, tf.nsect,
- tf.lbal, tf.lbam, tf.lbah, tf.device);
-
- rtf = tf;
- err_mask = ata_exec_internal(dev, &rtf, NULL, DMA_NONE, NULL, 0, 0);
- if (err_mask) {
- ata_dev_printk(dev, KERN_ERR,
- "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x failed "
- "(Emask=0x%x Stat=0x%02x Err=0x%02x)\n",
- tf.command, tf.feature, tf.nsect, tf.lbal, tf.lbam,
- tf.lbah, tf.device, err_mask, rtf.command, rtf.feature);
- return -EIO;
+ switch (err_mask) {
+ case 0:
+ level = KERN_DEBUG;
+ snprintf(msg, sizeof(msg), "succeeded");
+ rc = 1;
+ break;
+
+ case AC_ERR_DEV:
+ level = KERN_INFO;
+ snprintf(msg, sizeof(msg),
+ "rejected by device (Stat=0x%02x Err=0x%02x)",
+ rtf.command, rtf.feature);
+ rc = 0;
+ break;
+
+ default:
+ level = KERN_ERR;
+ snprintf(msg, sizeof(msg),
+ "failed (Emask=0x%x Stat=0x%02x Err=0x%02x)",
+ err_mask, rtf.command, rtf.feature);
+ rc = -EIO;
+ break;
+ }
+ } else {
+ level = KERN_INFO;
+ snprintf(msg, sizeof(msg), "filtered out");
+ rc = 0;
}
- return 0;
+ ata_dev_printk(dev, level,
+ "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x %s\n",
+ tf.command, tf.feature, tf.nsect, tf.lbal,
+ tf.lbam, tf.lbah, tf.device, msg);
+
+ return rc;
}
/**
* ata_acpi_exec_tfs - get then write drive taskfile settings
* @dev: target ATA device
+ * @nr_executed: out paramter for the number of executed commands
*
* Evaluate _GTF and excute returned taskfiles.
*
* EH context.
*
* RETURNS:
- * Number of executed taskfiles on success, 0 if _GTF doesn't exist or
- * doesn't contain valid data. -errno on other errors.
+ * Number of executed taskfiles on success, 0 if _GTF doesn't exist.
+ * -errno on other errors.
*/
-static int ata_acpi_exec_tfs(struct ata_device *dev)
+static int ata_acpi_exec_tfs(struct ata_device *dev, int *nr_executed)
{
- struct ata_acpi_gtf *gtf = NULL;
- void *ptr_to_free = NULL;
+ struct ata_acpi_gtf *gtf = NULL, *pgtf = NULL;
int gtf_count, i, rc;
/* get taskfiles */
- gtf_count = ata_dev_get_GTF(dev, >f, &ptr_to_free);
+ rc = ata_dev_get_GTF(dev, >f);
+ if (rc < 0)
+ return rc;
+ gtf_count = rc;
/* execute them */
- for (i = 0, rc = 0; i < gtf_count; i++) {
- int tmp;
-
- /* ACPI errors are eventually ignored. Run till the
- * end even after errors.
- */
- tmp = taskfile_load_raw(dev, gtf++);
- if (!rc)
- rc = tmp;
+ for (i = 0; i < gtf_count; i++, gtf++) {
+ rc = ata_acpi_run_tf(dev, gtf, pgtf);
+ if (rc < 0)
+ break;
+ if (rc) {
+ (*nr_executed)++;
+ pgtf = gtf;
+ }
}
- kfree(ptr_to_free);
+ ata_acpi_clear_gtf(dev);
- if (rc == 0)
- return gtf_count;
- return rc;
+ if (rc < 0)
+ return rc;
+ return 0;
}
/**
if (ata_msg_probe(ap))
ata_dev_printk(dev, KERN_DEBUG, "%s: ix = %d, port#: %d\n",
- __FUNCTION__, dev->devno, ap->port_no);
+ __func__, dev->devno, ap->port_no);
/* Give the drive Identify data to the drive via the _SDD method */
/* _SDD: set up input parameters */
*/
int ata_acpi_on_suspend(struct ata_port *ap)
{
- unsigned long flags;
- int rc;
-
- /* proceed iff per-port acpi_handle is valid */
- if (!ap->acpi_handle)
- return 0;
- BUG_ON(ap->flags & ATA_FLAG_ACPI_SATA);
-
- /* store timing parameters */
- rc = ata_acpi_gtm(ap, &ap->acpi_gtm);
-
- spin_lock_irqsave(ap->lock, flags);
- if (rc == 0)
- ap->pflags |= ATA_PFLAG_GTM_VALID;
- else
- ap->pflags &= ~ATA_PFLAG_GTM_VALID;
- spin_unlock_irqrestore(ap->lock, flags);
-
- if (rc == -ENOENT)
- rc = 0;
- return rc;
+ /* nada */
+ return 0;
}
/**
*/
void ata_acpi_on_resume(struct ata_port *ap)
{
+ const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap);
struct ata_device *dev;
- if (ap->acpi_handle && (ap->pflags & ATA_PFLAG_GTM_VALID)) {
- BUG_ON(ap->flags & ATA_FLAG_ACPI_SATA);
+ if (ap->acpi_handle && gtm) {
+ /* _GTM valid */
/* restore timing parameters */
- ata_acpi_stm(ap, &ap->acpi_gtm);
+ ata_acpi_stm(ap, gtm);
+
+ /* _GTF should immediately follow _STM so that it can
+ * use values set by _STM. Cache _GTF result and
+ * schedule _GTF.
+ */
+ ata_link_for_each_dev(dev, &ap->link) {
+ ata_acpi_clear_gtf(dev);
+ if (ata_dev_get_GTF(dev, NULL) >= 0)
+ dev->flags |= ATA_DFLAG_ACPI_PENDING;
+ }
+ } else {
+ /* SATA _GTF needs to be evaulated after _SDD and
+ * there's no reason to evaluate IDE _GTF early
+ * without _STM. Clear cache and schedule _GTF.
+ */
+ ata_link_for_each_dev(dev, &ap->link) {
+ ata_acpi_clear_gtf(dev);
+ dev->flags |= ATA_DFLAG_ACPI_PENDING;
+ }
}
+}
- /* schedule _GTF */
- ata_link_for_each_dev(dev, &ap->link)
- dev->flags |= ATA_DFLAG_ACPI_PENDING;
+/**
+ * ata_acpi_set_state - set the port power state
+ * @ap: target ATA port
+ * @state: state, on/off
+ *
+ * This function executes the _PS0/_PS3 ACPI method to set the power state.
+ * ACPI spec requires _PS0 when IDE power on and _PS3 when power off
+ */
+void ata_acpi_set_state(struct ata_port *ap, pm_message_t state)
+{
+ struct ata_device *dev;
+
+ if (!ap->acpi_handle || (ap->flags & ATA_FLAG_ACPI_SATA))
+ return;
+
+ /* channel first and then drives for power on and vica versa
+ for power off */
+ if (state.event == PM_EVENT_ON)
+ acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D0);
+
+ ata_link_for_each_dev(dev, &ap->link) {
+ if (dev->acpi_handle && ata_dev_enabled(dev))
+ acpi_bus_set_power(dev->acpi_handle,
+ state.event == PM_EVENT_ON ?
+ ACPI_STATE_D0 : ACPI_STATE_D3);
+ }
+ if (state.event != PM_EVENT_ON)
+ acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D3);
}
/**
struct ata_port *ap = dev->link->ap;
struct ata_eh_context *ehc = &ap->link.eh_context;
int acpi_sata = ap->flags & ATA_FLAG_ACPI_SATA;
+ int nr_executed = 0;
int rc;
if (!dev->acpi_handle)
}
/* do _GTF */
- rc = ata_acpi_exec_tfs(dev);
- if (rc < 0)
+ rc = ata_acpi_exec_tfs(dev, &nr_executed);
+ if (rc)
goto acpi_err;
dev->flags &= ~ATA_DFLAG_ACPI_PENDING;
/* refresh IDENTIFY page if any _GTF command has been executed */
- if (rc > 0) {
+ if (nr_executed) {
rc = ata_dev_reread_id(dev, 0);
if (rc < 0) {
ata_dev_printk(dev, KERN_ERR, "failed to IDENTIFY "
return 0;
acpi_err:
- /* let EH retry on the first failure, disable ACPI on the second */
- if (dev->flags & ATA_DFLAG_ACPI_FAILED) {
- ata_dev_printk(dev, KERN_WARNING, "ACPI on devcfg failed the "
- "second time, disabling (errno=%d)\n", rc);
-
- dev->acpi_handle = NULL;
+ /* ignore evaluation failure if we can continue safely */
+ if (rc == -EINVAL && !nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN))
+ return 0;
- /* if port is working, request IDENTIFY reload and continue */
- if (!(ap->pflags & ATA_PFLAG_FROZEN))
- rc = 1;
+ /* fail and let EH retry once more for unknown IO errors */
+ if (!(dev->flags & ATA_DFLAG_ACPI_FAILED)) {
+ dev->flags |= ATA_DFLAG_ACPI_FAILED;
+ return rc;
}
- dev->flags |= ATA_DFLAG_ACPI_FAILED;
+
+ ata_dev_printk(dev, KERN_WARNING,
+ "ACPI: failed the second time, disabled\n");
+ dev->acpi_handle = NULL;
+
+ /* We can safely continue if no _GTF command has been executed
+ * and port is not frozen.
+ */
+ if (!nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN))
+ return 0;
+
return rc;
}
+
+/**
+ * ata_acpi_on_disable - ATA ACPI hook called when a device is disabled
+ * @dev: target ATA device
+ *
+ * This function is called when @dev is about to be disabled.
+ *
+ * LOCKING:
+ * EH context.
+ */
+void ata_acpi_on_disable(struct ata_device *dev)
+{
+ ata_acpi_clear_gtf(dev);
+}
git.samba.org / sfrench / cifs-2.6.git / blobdiff