module_param(atapi_enabled, int, 0444);
MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)");
+int libata_fua = 0;
+module_param_named(fua, libata_fua, int, 0444);
+MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)");
+
MODULE_AUTHOR("Jeff Garzik");
MODULE_DESCRIPTION("Library module for ATA devices");
MODULE_LICENSE("GPL");
* @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
+ * @p_id: read IDENTIFY page (newly allocated)
*
* Read ID data from the specified device. ATA_CMD_ID_ATA is
* performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
* 0 on success, -errno otherwise.
*/
static int ata_dev_read_id(struct ata_port *ap, struct ata_device *dev,
- unsigned int *p_class, int post_reset, u16 *id)
+ unsigned int *p_class, int post_reset, u16 **p_id)
{
unsigned int class = *p_class;
unsigned int using_edd;
struct ata_taskfile tf;
unsigned int err_mask = 0;
+ u16 *id;
const char *reason;
int rc;
ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */
+ id = kmalloc(sizeof(id[0]) * ATA_ID_WORDS, GFP_KERNEL);
+ if (id == NULL) {
+ rc = -ENOMEM;
+ reason = "out of memory";
+ goto err_out;
+ }
+
retry:
ata_tf_init(ap, &tf, dev->devno);
}
*p_class = class;
+ *p_id = id;
return 0;
err_out:
return rc;
}
+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(dev->id)));
+}
+
/**
- * 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_configure - Configure the specified ATA/ATAPI device
+ * @ap: Port on which target device resides
+ * @dev: Target device to configure
+ *
+ * Configure @dev according to @dev->id. Generic and low-level
+ * driver specific fixups are also applied.
*
* 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_configure(struct ata_port *ap, struct ata_device *dev)
{
- 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;
+ ap->id, dev->devno);
+ return 0;
}
- 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;
+ DPRINTK("ENTER, host %u, dev %u\n", ap->id, dev->devno);
/*
* common ATA, ATAPI feature tests
/* we require DMA support (bits 8 of word 49) */
if (!ata_id_has_dma(dev->id)) {
printk(KERN_DEBUG "ata%u: no dma\n", ap->id);
+ rc = -EINVAL;
goto err_out_nosup;
}
/* print device info to dmesg */
printk(KERN_INFO "ata%u: dev %u ATA-%d, max %s, %Lu sectors:%s\n",
- ap->id, device,
+ ap->id, dev->devno,
ata_id_major_version(dev->id),
ata_mode_string(xfer_modes),
(unsigned long long)dev->n_sectors,
dev->flags & ATA_DFLAG_LBA48 ? " LBA48" : " LBA");
- } else {
+ } else {
/* CHS */
/* Default translation */
/* 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,
+ ap->id, dev->devno,
ata_id_major_version(dev->id),
ata_mode_string(xfer_modes),
(unsigned long long)dev->n_sectors,
rc = atapi_cdb_len(dev->id);
if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
printk(KERN_WARNING "ata%u: unsupported CDB len\n", ap->id);
+ rc = -EINVAL;
goto err_out_nosup;
}
dev->cdb_len = (unsigned int) rc;
/* print device info to dmesg */
printk(KERN_INFO "ata%u: dev %u ATAPI, max %s\n",
- ap->id, device,
+ ap->id, dev->devno,
ata_mode_string(xfer_modes));
}
ap->host->max_cmd_len,
ap->device[i].cdb_len);
- DPRINTK("EXIT, drv_stat = 0x%x\n", ata_chk_status(ap));
- return;
-
-err_out_nosup:
- printk(KERN_WARNING "ata%u: dev %u not supported, ignoring\n",
- ap->id, device);
-err_out:
- dev->class++; /* converts ATA_DEV_xxx into ATA_DEV_xxx_UNSUP */
- DPRINTK("EXIT, err\n");
-}
-
-
-static inline u8 ata_dev_knobble(const struct ata_port *ap,
- struct ata_device *dev)
-{
- return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
-}
-
-/**
- * ata_dev_config - Run device specific handlers & check for SATA->PATA bridges
- * @ap: Bus
- * @i: Device
- *
- * LOCKING:
- */
-
-void ata_dev_config(struct ata_port *ap, unsigned int i)
-{
/* limit bridge transfers to udma5, 200 sectors */
- if (ata_dev_knobble(ap, &ap->device[i])) {
+ if (ata_dev_knobble(ap, dev)) {
printk(KERN_INFO "ata%u(%u): applying bridge limits\n",
- ap->id, i);
+ ap->id, dev->devno);
ap->udma_mask &= ATA_UDMA5;
- ap->device[i].max_sectors = ATA_MAX_SECTORS;
+ dev->max_sectors = ATA_MAX_SECTORS;
}
if (ap->ops->dev_config)
- ap->ops->dev_config(ap, &ap->device[i]);
+ ap->ops->dev_config(ap, dev);
+
+ DPRINTK("EXIT, drv_stat = 0x%x\n", ata_chk_status(ap));
+ return 0;
+
+err_out_nosup:
+ printk(KERN_WARNING "ata%u: dev %u not supported, ignoring\n",
+ ap->id, dev->devno);
+ DPRINTK("EXIT, err\n");
+ return rc;
}
/**
goto err_out;
for (i = 0; i < ATA_MAX_DEVICES; i++) {
- ata_dev_identify(ap, i);
- if (ata_dev_present(&ap->device[i])) {
- found = 1;
- ata_dev_config(ap,i);
+ struct ata_device *dev = &ap->device[i];
+
+ if (!ata_dev_present(dev))
+ continue;
+
+ WARN_ON(dev->id != NULL);
+ if (ata_dev_read_id(ap, dev, &dev->class, 1, &dev->id)) {
+ dev->class = ATA_DEV_NONE;
+ continue;
+ }
+
+ if (ata_dev_configure(ap, dev)) {
+ dev->class++; /* disable device */
+ continue;
}
+
+ found = 1;
}
if ((!found) || (ap->flags & ATA_FLAG_PORT_DISABLED))
int ata_scsi_release(struct Scsi_Host *host)
{
struct ata_port *ap = (struct ata_port *) &host->hostdata[0];
+ int i;
DPRINTK("ENTER\n");
ap->ops->port_disable(ap);
ata_host_remove(ap, 0);
+ for (i = 0; i < ATA_MAX_DEVICES; i++)
+ kfree(ap->device[i].id);
DPRINTK("EXIT\n");
return 1;
EXPORT_SYMBOL_GPL(ata_dev_classify);
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);
git.samba.org / sfrench / cifs-2.6.git / blobdiff