* Copyright (C) 2006 Randy Dunlap
*/
+#include <linux/module.h>
#include <linux/ata.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/acpi.h>
#include <linux/libata.h>
#include <linux/pci.h>
+#include <scsi/scsi_device.h>
#include "libata.h"
#include <acpi/acpi_bus.h>
-#include <acpi/acnames.h>
-#include <acpi/acnamesp.h>
-#include <acpi/acparser.h>
-#include <acpi/acexcep.h>
-#include <acpi/acmacros.h>
-#include <acpi/actypes.h>
+
+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, 0x4=DIPM, 0x8=FPDMA non-zero offset, 0x10=FPDMA DMA Setup FIS auto-activate)");
#define NO_PORT_MULT 0xffff
-#define SATA_ADR(root,pmp) (((root) << 16) | (pmp))
+#define SATA_ADR(root, pmp) (((root) << 16) | (pmp))
#define REGS_PER_GTF 7
struct ata_acpi_gtf {
return (dev->bus == &pci_bus_type);
}
-static void ata_acpi_associate_sata_port(struct ata_port *ap)
+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
+ *
+ * Look up ACPI objects associated with @ap and initialize acpi_handle
+ * fields of @ap, the port and devices accordingly.
+ *
+ * LOCKING:
+ * EH context.
+ *
+ * RETURNS:
+ * 0 on success, -errno on failure.
+ */
+void ata_acpi_associate_sata_port(struct ata_port *ap)
{
- acpi_integer adr = SATA_ADR(ap->port_no, NO_PORT_MULT);
+ WARN_ON(!(ap->flags & ATA_FLAG_ACPI_SATA));
+
+ if (!sata_pmp_attached(ap)) {
+ acpi_integer adr = SATA_ADR(ap->port_no, NO_PORT_MULT);
+
+ ap->link.device->acpi_handle =
+ acpi_get_child(ap->host->acpi_handle, adr);
+ } else {
+ struct ata_link *link;
+
+ ap->link.device->acpi_handle = NULL;
+
+ ata_for_each_link(link, ap, EDGE) {
+ acpi_integer adr = SATA_ADR(ap->port_no, link->pmp);
- ap->device->acpi_handle = acpi_get_child(ap->host->acpi_handle, adr);
+ link->device->acpi_handle =
+ acpi_get_child(ap->host->acpi_handle, adr);
+ }
+ }
}
static void ata_acpi_associate_ide_port(struct ata_port *ap)
max_devices++;
for (i = 0; i < max_devices; i++) {
- struct ata_device *dev = &ap->device[i];
+ struct ata_device *dev = &ap->link.device[i];
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;
+}
+
+/* @ap and @dev are the same as ata_acpi_handle_hotplug() */
+static void ata_acpi_detach_device(struct ata_port *ap, struct ata_device *dev)
+{
+ if (dev)
+ dev->flags |= ATA_DFLAG_DETACH;
+ else {
+ struct ata_link *tlink;
+ struct ata_device *tdev;
+
+ ata_for_each_link(tlink, ap, EDGE)
+ ata_for_each_dev(tdev, tlink, ALL)
+ tdev->flags |= ATA_DFLAG_DETACH;
+ }
+
+ ata_port_schedule_eh(ap);
+}
+
+/**
+ * ata_acpi_handle_hotplug - ACPI event handler backend
+ * @ap: ATA port ACPI event occurred
+ * @dev: ATA device ACPI event occurred (can be NULL)
+ * @event: ACPI event which occurred
+ *
+ * All ACPI bay / device realted events end up in this function. If
+ * the event is port-wide @dev is NULL. If the event is specific to a
+ * device, @dev points to it.
+ *
+ * Hotplug (as opposed to unplug) notification is always handled as
+ * port-wide while unplug only kills the target device on device-wide
+ * event.
+ *
+ * LOCKING:
+ * ACPI notify handler context. May sleep.
+ */
+static void ata_acpi_handle_hotplug(struct ata_port *ap, struct ata_device *dev,
+ u32 event)
+{
+ struct ata_eh_info *ehi = &ap->link.eh_info;
+ int wait = 0;
+ unsigned long flags;
+ acpi_handle handle;
+
+ if (dev)
+ handle = dev->acpi_handle;
+ else
+ handle = ap->acpi_handle;
+
+ spin_lock_irqsave(ap->lock, flags);
+ /*
+ * When dock driver calls into the routine, it will always use
+ * ACPI_NOTIFY_BUS_CHECK/ACPI_NOTIFY_DEVICE_CHECK for add and
+ * ACPI_NOTIFY_EJECT_REQUEST for remove
+ */
+ 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");
+
+ ata_acpi_detach_device(ap, dev);
+ wait = 1;
+ break;
+ }
+
+ spin_unlock_irqrestore(ap->lock, flags);
+
+ if (wait)
+ ata_port_wait_eh(ap);
+}
+
+static void ata_acpi_dev_notify_dock(acpi_handle handle, u32 event, void *data)
+{
+ struct ata_device *dev = data;
+
+ ata_acpi_handle_hotplug(dev->link->ap, dev, event);
+}
+
+static void ata_acpi_ap_notify_dock(acpi_handle handle, u32 event, void *data)
+{
+ struct ata_port *ap = data;
+
+ ata_acpi_handle_hotplug(ap, NULL, event);
+}
+
+static void ata_acpi_uevent(struct ata_port *ap, struct ata_device *dev,
+ u32 event)
+{
+ struct kobject *kobj = NULL;
+ char event_string[20];
+ char *envp[] = { event_string, NULL };
+
+ if (dev) {
+ if (dev->sdev)
+ kobj = &dev->sdev->sdev_gendev.kobj;
+ } else
+ kobj = &ap->dev->kobj;
+
+ if (kobj) {
+ snprintf(event_string, 20, "BAY_EVENT=%d", event);
+ kobject_uevent_env(kobj, KOBJ_CHANGE, envp);
+ }
+}
+
+static void ata_acpi_ap_uevent(acpi_handle handle, u32 event, void *data)
+{
+ ata_acpi_uevent(data, NULL, event);
}
+static void ata_acpi_dev_uevent(acpi_handle handle, u32 event, void *data)
+{
+ struct ata_device *dev = data;
+ ata_acpi_uevent(dev->link->ap, dev, event);
+}
+
+static struct acpi_dock_ops ata_acpi_dev_dock_ops = {
+ .handler = ata_acpi_dev_notify_dock,
+ .uevent = ata_acpi_dev_uevent,
+};
+
+static struct acpi_dock_ops ata_acpi_ap_dock_ops = {
+ .handler = ata_acpi_ap_notify_dock,
+ .uevent = ata_acpi_ap_uevent,
+};
+
/**
* ata_acpi_associate - associate ATA host with ACPI objects
* @host: target ATA host
*/
void ata_acpi_associate(struct ata_host *host)
{
- int i;
+ int i, j;
if (!is_pci_dev(host->dev) || libata_noacpi)
return;
ata_acpi_associate_sata_port(ap);
else
ata_acpi_associate_ide_port(ap);
+
+ if (ap->acpi_handle) {
+ /* we might be on a docking station */
+ register_hotplug_dock_device(ap->acpi_handle,
+ &ata_acpi_ap_dock_ops, ap);
+ }
+
+ for (j = 0; j < ata_link_max_devices(&ap->link); j++) {
+ struct ata_device *dev = &ap->link.device[j];
+
+ if (dev->acpi_handle) {
+ /* we might be on a docking station */
+ register_hotplug_dock_device(dev->acpi_handle,
+ &ata_acpi_dev_dock_ops, dev);
+ }
+ }
+ }
+}
+
+/**
+ * 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
+ * @gtm: out parameter for _GTM result
+ *
+ * Evaluate _GTM and store the result in @gtm.
+ *
+ * LOCKING:
+ * EH context.
+ *
+ * RETURNS:
+ * 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure.
+ */
+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;
+ acpi_status status;
+ int rc = 0;
+
+ status = acpi_evaluate_object(ap->acpi_handle, "_GTM", NULL, &output);
+
+ rc = -ENOENT;
+ if (status == AE_NOT_FOUND)
+ goto out_free;
+
+ rc = -EINVAL;
+ if (ACPI_FAILURE(status)) {
+ ata_port_printk(ap, KERN_ERR,
+ "ACPI get timing mode failed (AE 0x%x)\n",
+ status);
+ goto out_free;
+ }
+
+ out_obj = output.pointer;
+ if (out_obj->type != ACPI_TYPE_BUFFER) {
+ ata_port_printk(ap, KERN_WARNING,
+ "_GTM returned unexpected object type 0x%x\n",
+ out_obj->type);
+
+ goto out_free;
+ }
+
+ if (out_obj->buffer.length != sizeof(struct ata_acpi_gtm)) {
+ ata_port_printk(ap, KERN_ERR,
+ "_GTM returned invalid length %d\n",
+ out_obj->buffer.length);
+ goto out_free;
+ }
+
+ memcpy(gtm, out_obj->buffer.pointer, sizeof(struct ata_acpi_gtm));
+ rc = 0;
+ out_free:
+ kfree(output.pointer);
+ return rc;
+}
+
+EXPORT_SYMBOL_GPL(ata_acpi_gtm);
+
+/**
+ * ata_acpi_stm - execute _STM
+ * @ap: target ATA port
+ * @stm: timing parameter to _STM
+ *
+ * Evaluate _STM with timing parameter @stm.
+ *
+ * LOCKING:
+ * EH context.
+ *
+ * RETURNS:
+ * 0 on success, -ENOENT if _STM doesn't exist, -errno on failure.
+ */
+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_buf;
+ /* Buffers for id may need byteswapping ? */
+ in_params[1].type = ACPI_TYPE_BUFFER;
+ in_params[1].buffer.length = 512;
+ in_params[1].buffer.pointer = (u8 *)ap->link.device[0].id;
+ in_params[2].type = ACPI_TYPE_BUFFER;
+ in_params[2].buffer.length = 512;
+ in_params[2].buffer.pointer = (u8 *)ap->link.device[1].id;
+
+ input.count = 3;
+ input.pointer = in_params;
+
+ status = acpi_evaluate_object(ap->acpi_handle, "_STM", &input, NULL);
+
+ if (status == AE_NOT_FOUND)
+ return -ENOENT;
+ if (ACPI_FAILURE(status)) {
+ ata_port_printk(ap, KERN_ERR,
+ "ACPI set timing mode failed (status=0x%x)\n", status);
+ return -EINVAL;
}
+ return 0;
}
+EXPORT_SYMBOL_GPL(ata_acpi_stm);
+
/**
* 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. -errno on other errors.
+ * 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->ap;
+ struct ata_port *ap = dev->link->ap;
acpi_status status;
struct acpi_buffer output;
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 (!dev->acpi_handle)
- goto out_free;
-
if (ata_msg_probe(ap))
ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER: port#: %d\n",
- __FUNCTION__, ap->port_no);
-
- if (!ata_dev_enabled(dev) || (ap->flags & ATA_FLAG_DISABLED)) {
- if (ata_msg_probe(ap))
- ata_dev_printk(dev, KERN_DEBUG, "%s: ERR: "
- "ata_dev_present: %d, PORT_DISABLED: %lu\n",
- __FUNCTION__, ata_dev_enabled(dev),
- ap->flags & ATA_FLAG_DISABLED);
- goto out_free;
- }
+ __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 = -EIO;
+ 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",
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;
}
/**
- * taskfile_load_raw - send taskfile registers to host controller
+ * 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 @gtm indicates the BIOS selected an 80wire mode.
+ */
+int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm)
+{
+ struct ata_device *dev;
+
+ ata_for_each_dev(dev, &ap->link, ENABLED) {
+ unsigned long xfer_mask, udma_mask;
+
+ 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;
+ }
+
+ 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(struct ata_device *dev,
+ const struct ata_taskfile *tf,
+ const struct ata_taskfile *ptf)
+{
+ if (dev->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 (dev->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;
+ }
+
+ if (tf->command == ATA_CMD_SET_FEATURES &&
+ tf->feature == SETFEATURES_SATA_ENABLE) {
+ /* inhibit enabling DIPM */
+ if (dev->gtf_filter & ATA_ACPI_FILTER_DIPM &&
+ tf->nsect == SATA_DIPM)
+ return 1;
+
+ /* inhibit FPDMA non-zero offset */
+ if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_OFFSET &&
+ (tf->nsect == SATA_FPDMA_OFFSET ||
+ tf->nsect == SATA_FPDMA_IN_ORDER))
+ return 1;
+
+ /* inhibit FPDMA auto activation */
+ if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_AA &&
+ tf->nsect == SATA_FPDMA_AA)
+ return 1;
+ }
+
+ return 0;
+}
+
+/**
+ * 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->ap;
- struct ata_taskfile tf, rtf;
+ struct ata_taskfile *pptf = NULL;
+ struct ata_taskfile tf, ptf, rtf;
unsigned int err_mask;
+ const char *level;
+ const char *descr;
+ 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);
-
- /* 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_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);
- 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;
+ ata_acpi_gtf_to_tf(dev, gtf, &tf);
+ if (prev_gtf) {
+ ata_acpi_gtf_to_tf(dev, prev_gtf, &ptf);
+ pptf = &ptf;
}
- return 0;
-}
-
-/**
- * ata_dev_set_taskfiles - write the drive taskfile settings from _GTF
- * @dev: target ATA device
- * @gtf: pointer to array of _GTF taskfiles to execute
- * @gtf_count: number of taskfiles
- *
- * This applies to both PATA and SATA drives.
- *
- * Execute taskfiles in @gtf.
- *
- * LOCKING:
- * EH context.
- *
- * RETURNS:
- * 0 on success, -errno on failure.
- */
-static int ata_dev_set_taskfiles(struct ata_device *dev,
- struct ata_acpi_gtf *gtf, int gtf_count)
-{
- struct ata_port *ap = dev->ap;
- int ix;
+ if (!ata_acpi_filter_tf(dev, &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, "%s: ENTER: port#: %d\n",
- __FUNCTION__, ap->port_no);
+ switch (err_mask) {
+ case 0:
+ level = KERN_DEBUG;
+ snprintf(msg, sizeof(msg), "succeeded");
+ rc = 1;
+ break;
- if (!(ap->flags & ATA_FLAG_ACPI_SATA))
- return 0;
+ 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;
- if (!ata_dev_enabled(dev) || (ap->flags & ATA_FLAG_DISABLED))
- return -ENODEV;
+ 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;
+ }
+ descr = ata_get_cmd_descript(tf.command);
- /* send all TaskFile registers (0x1f1-0x1f7) *in*that*order* */
- for (ix = 0; ix < gtf_count; ix++)
- taskfile_load_raw(dev, gtf++);
+ ata_dev_printk(dev, level,
+ "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x (%s) %s\n",
+ tf.command, tf.feature, tf.nsect, tf.lbal,
+ tf.lbam, tf.lbah, tf.device,
+ (descr ? descr : "unknown"), msg);
- return 0;
+ return rc;
}
/**
* ata_acpi_exec_tfs - get then write drive taskfile settings
- * @ap: the ata_port for the drive
+ * @dev: target ATA device
+ * @nr_executed: out parameter for the number of executed commands
*
- * This applies to both PATA and SATA drives.
+ * Evaluate _GTF and execute returned taskfiles.
*
* LOCKING:
* EH context.
*
* RETURNS:
- * 0 on success, -errno on failure.
+ * Number of executed taskfiles on success, 0 if _GTF doesn't exist.
+ * -errno on other errors.
*/
-int ata_acpi_exec_tfs(struct ata_port *ap)
+static int ata_acpi_exec_tfs(struct ata_device *dev, int *nr_executed)
{
- int ix, ret = 0;
+ struct ata_acpi_gtf *gtf = NULL, *pgtf = NULL;
+ int gtf_count, i, rc;
- /*
- * TBD - implement PATA support. For now,
- * we should not run GTF on PATA devices since some
- * PATA require execution of GTM/STM before GTF.
- */
- if (!(ap->flags & ATA_FLAG_ACPI_SATA))
- return 0;
-
- for (ix = 0; ix < ATA_MAX_DEVICES; ix++) {
- struct ata_device *dev = &ap->device[ix];
- struct ata_acpi_gtf *gtf = NULL;
- int gtf_count;
- void *ptr_to_free = NULL;
-
- if (!ata_dev_enabled(dev))
- continue;
-
- ret = ata_dev_get_GTF(dev, >f, &ptr_to_free);
- if (ret == 0)
- continue;
- if (ret < 0)
- break;
- gtf_count = ret;
+ /* get taskfiles */
+ rc = ata_dev_get_GTF(dev, >f);
+ if (rc < 0)
+ return rc;
+ gtf_count = rc;
- ret = ata_dev_set_taskfiles(dev, gtf, gtf_count);
- kfree(ptr_to_free);
- if (ret < 0)
+ /* execute them */
+ 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;
+ }
}
- return ret;
+ ata_acpi_clear_gtf(dev);
+
+ if (rc < 0)
+ return rc;
+ return 0;
}
/**
* EH context.
*
* RETURNS:
- * 0 on success, -errno on failure.
+ * 0 on success, -ENOENT if _SDD doesn't exist, -errno on failure.
*/
-int ata_acpi_push_id(struct ata_device *dev)
+static int ata_acpi_push_id(struct ata_device *dev)
{
- struct ata_port *ap = dev->ap;
- int err;
+ struct ata_port *ap = dev->link->ap;
acpi_status status;
struct acpi_object_list input;
union acpi_object in_params[1];
- if (!dev->acpi_handle)
- 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);
-
- /* Don't continue if not a SATA device. */
- if (!(ap->flags & ATA_FLAG_ACPI_SATA)) {
- if (ata_msg_probe(ap))
- ata_dev_printk(dev, KERN_DEBUG,
- "%s: Not a SATA device\n", __FUNCTION__);
- goto out;
- }
+ __func__, dev->devno, ap->port_no);
/* Give the drive Identify data to the drive via the _SDD method */
/* _SDD: set up input parameters */
status = acpi_evaluate_object(dev->acpi_handle, "_SDD", &input, NULL);
swap_buf_le16(dev->id, ATA_ID_WORDS);
- err = ACPI_FAILURE(status) ? -EIO : 0;
- if (err < 0)
+ if (status == AE_NOT_FOUND)
+ return -ENOENT;
+
+ if (ACPI_FAILURE(status)) {
ata_dev_printk(dev, KERN_WARNING,
"ACPI _SDD failed (AE 0x%x)\n", status);
+ return -EIO;
+ }
- /* always return success */
-out:
return 0;
}
+/**
+ * ata_acpi_on_suspend - ATA ACPI hook called on suspend
+ * @ap: target ATA port
+ *
+ * This function is called when @ap is about to be suspended. All
+ * devices are already put to sleep but the port_suspend() callback
+ * hasn't been executed yet. Error return from this function aborts
+ * suspend.
+ *
+ * LOCKING:
+ * EH context.
+ *
+ * RETURNS:
+ * 0 on success, -errno on failure.
+ */
+int ata_acpi_on_suspend(struct ata_port *ap)
+{
+ /* nada */
+ return 0;
+}
+
+/**
+ * ata_acpi_on_resume - ATA ACPI hook called on resume
+ * @ap: target ATA port
+ *
+ * This function is called when @ap is resumed - right after port
+ * itself is resumed but before any EH action is taken.
+ *
+ * LOCKING:
+ * EH context.
+ */
+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 && gtm) {
+ /* _GTM valid */
+
+ /* restore timing parameters */
+ 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_for_each_dev(dev, &ap->link, ALL) {
+ ata_acpi_clear_gtf(dev);
+ if (ata_dev_enabled(dev) &&
+ 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_for_each_dev(dev, &ap->link, ALL) {
+ ata_acpi_clear_gtf(dev);
+ if (ata_dev_enabled(dev))
+ 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_for_each_dev(dev, &ap->link, ENABLED) {
+ if (dev->acpi_handle)
+ 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);
+}
+
+/**
+ * ata_acpi_on_devcfg - ATA ACPI hook called on device donfiguration
+ * @dev: target ATA device
+ *
+ * This function is called when @dev is about to be configured.
+ * IDENTIFY data might have been modified after this hook is run.
+ *
+ * LOCKING:
+ * EH context.
+ *
+ * RETURNS:
+ * Positive number if IDENTIFY data needs to be refreshed, 0 if not,
+ * -errno on failure.
+ */
+int ata_acpi_on_devcfg(struct ata_device *dev)
+{
+ 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)
+ return 0;
+
+ /* do we need to do _GTF? */
+ if (!(dev->flags & ATA_DFLAG_ACPI_PENDING) &&
+ !(acpi_sata && (ehc->i.flags & ATA_EHI_DID_HARDRESET)))
+ return 0;
+
+ /* do _SDD if SATA */
+ if (acpi_sata) {
+ rc = ata_acpi_push_id(dev);
+ if (rc && rc != -ENOENT)
+ goto acpi_err;
+ }
+
+ /* do _GTF */
+ 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 (nr_executed) {
+ rc = ata_dev_reread_id(dev, 0);
+ if (rc < 0) {
+ ata_dev_printk(dev, KERN_ERR, "failed to IDENTIFY "
+ "after ACPI commands\n");
+ return rc;
+ }
+ }
+
+ return 0;
+
+ acpi_err:
+ /* ignore evaluation failure if we can continue safely */
+ if (rc == -EINVAL && !nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN))
+ return 0;
+
+ /* 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;
+ }
+
+ 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://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff