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_msg_probe(ap))
- ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER: port#: %d\n",
- __FUNCTION__, ap->port_no);
-
- if (!(ap->flags & ATA_FLAG_ACPI_SATA))
- return 0;
-
- if (!ata_dev_enabled(dev) || (ap->flags & ATA_FLAG_DISABLED))
- return -ENODEV;
-
- /* send all TaskFile registers (0x1f1-0x1f7) *in*that*order* */
- for (ix = 0; ix < gtf_count; ix++)
- taskfile_load_raw(dev, gtf++);
-
- return 0;
-}
-
/**
* ata_acpi_exec_tfs - get then write drive taskfile settings
- * @ap: the ata_port for the drive
+ * @dev: target ATA device
*
- * This applies to both PATA and SATA drives.
+ * Evaluate _GTF and excute returned taskfiles.
*
* LOCKING:
* EH context.
*
* RETURNS:
- * 0 on success, -errno on failure.
+ * Number of executed taskfiles on success, 0 if _GTF doesn't exist or
+ * doesn't contain valid data. -errno on other errors.
*/
-int ata_acpi_exec_tfs(struct ata_port *ap)
+static int ata_acpi_exec_tfs(struct ata_device *dev)
{
- int ix, ret = 0;
-
- /*
- * 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;
-
- ret = ata_dev_set_taskfiles(dev, gtf, gtf_count);
- kfree(ptr_to_free);
- if (ret < 0)
- break;
+ struct ata_acpi_gtf *gtf = NULL;
+ void *ptr_to_free = NULL;
+ int gtf_count, i, rc;
+
+ /* get taskfiles */
+ rc = ata_dev_get_GTF(dev, >f, &ptr_to_free);
+ 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;
}
- return ret;
+ kfree(ptr_to_free);
+
+ if (rc == 0)
+ return gtf_count;
+ return rc;
}
/**
* RETURNS:
* 0 on success, -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;
if (ata_msg_probe(ap))
ata_dev_printk(dev, KERN_DEBUG,
"%s: Not a SATA device\n", __FUNCTION__);
- goto out;
+ return 0;
}
/* Give the drive Identify data to the drive via the _SDD method */
ata_dev_printk(dev, KERN_WARNING,
"ACPI _SDD failed (AE 0x%x)\n", status);
- /* always return success */
-out:
- return 0;
+ return err;
+}
+
+/**
+ * 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)
+{
+ int i;
+
+ /* schedule _GTF */
+ for (i = 0; i < ATA_MAX_DEVICES; i++)
+ ap->device[i].flags |= ATA_DFLAG_ACPI_PENDING;
}
+/**
+ * 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->ap;
+ struct ata_eh_context *ehc = &ap->eh_context;
+ int acpi_sata = ap->flags & ATA_FLAG_ACPI_SATA;
+ int rc;
+
+ /* XXX: _STM isn't implemented yet, skip if IDE for now */
+ if (!acpi_sata)
+ return 0;
+ 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)
+ goto acpi_err;
+ }
+
+ /* do _GTF */
+ rc = ata_acpi_exec_tfs(dev);
+ if (rc < 0)
+ goto acpi_err;
+
+ dev->flags &= ~ATA_DFLAG_ACPI_PENDING;
+
+ /* refresh IDENTIFY page if any _GTF command has been executed */
+ if (rc > 0) {
+ 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:
+ /* 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;
+
+ /* if port is working, request IDENTIFY reload and continue */
+ if (!(ap->pflags & ATA_PFLAG_FROZEN))
+ rc = 1;
+ }
+ dev->flags |= ATA_DFLAG_ACPI_FAILED;
+ return rc;
+}
projects / firefly-linux-kernel-4.4.55.git / commitdiff