--- /dev/null
+/*
+ * Copyright 2008 ioogle, Inc. All rights reserved.
+ * Released under GPL v2.
+ *
+ * Libata transport class.
+ *
+ * The ATA transport class contains common code to deal with ATA HBAs,
+ * an approximated representation of ATA topologies in the driver model,
+ * and various sysfs attributes to expose these topologies and management
+ * interfaces to user-space.
+ *
+ * There are 3 objects defined in in this class:
+ * - ata_port
+ * - ata_link
+ * - ata_device
+ * Each port has a link object. Each link can have up to two devices for PATA
+ * and generally one for SATA.
+ * If there is SATA port multiplier [PMP], 15 additional ata_link object are
+ * created.
+ *
+ * These objects are created when the ata host is initialized and when a PMP is
+ * found. They are removed only when the HBA is removed, cleaned before the
+ * error handler runs.
+ */
+
+
+#include <linux/kernel.h>
+#include <linux/blkdev.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <scsi/scsi_transport.h>
+#include <linux/libata.h>
+#include <linux/hdreg.h>
+#include <linux/uaccess.h>
+#include <linux/pm_runtime.h>
+
+#include "libata.h"
+#include "libata-transport.h"
+
+#define ATA_PORT_ATTRS 3
+#define ATA_LINK_ATTRS 3
+#define ATA_DEV_ATTRS 9
+
+struct scsi_transport_template;
+struct scsi_transport_template *ata_scsi_transport_template;
+
+struct ata_internal {
+ struct scsi_transport_template t;
+
+ struct device_attribute private_port_attrs[ATA_PORT_ATTRS];
+ struct device_attribute private_link_attrs[ATA_LINK_ATTRS];
+ struct device_attribute private_dev_attrs[ATA_DEV_ATTRS];
+
+ struct transport_container link_attr_cont;
+ struct transport_container dev_attr_cont;
+
+ /*
+ * The array of null terminated pointers to attributes
+ * needed by scsi_sysfs.c
+ */
+ struct device_attribute *link_attrs[ATA_LINK_ATTRS + 1];
+ struct device_attribute *port_attrs[ATA_PORT_ATTRS + 1];
+ struct device_attribute *dev_attrs[ATA_DEV_ATTRS + 1];
+};
+#define to_ata_internal(tmpl) container_of(tmpl, struct ata_internal, t)
+
+
+#define tdev_to_device(d) \
+ container_of((d), struct ata_device, tdev)
+#define transport_class_to_dev(dev) \
+ tdev_to_device((dev)->parent)
+
+#define tdev_to_link(d) \
+ container_of((d), struct ata_link, tdev)
+#define transport_class_to_link(dev) \
+ tdev_to_link((dev)->parent)
+
+#define tdev_to_port(d) \
+ container_of((d), struct ata_port, tdev)
+#define transport_class_to_port(dev) \
+ tdev_to_port((dev)->parent)
+
+
+/* Device objects are always created whit link objects */
+static int ata_tdev_add(struct ata_device *dev);
+static void ata_tdev_delete(struct ata_device *dev);
+
+
+/*
+ * Hack to allow attributes of the same name in different objects.
+ */
+#define ATA_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
+ struct device_attribute device_attr_##_prefix##_##_name = \
+ __ATTR(_name,_mode,_show,_store)
+
+#define ata_bitfield_name_match(title, table) \
+static ssize_t \
+get_ata_##title##_names(u32 table_key, char *buf) \
+{ \
+ char *prefix = ""; \
+ ssize_t len = 0; \
+ int i; \
+ \
+ for (i = 0; i < ARRAY_SIZE(table); i++) { \
+ if (table[i].value & table_key) { \
+ len += sprintf(buf + len, "%s%s", \
+ prefix, table[i].name); \
+ prefix = ", "; \
+ } \
+ } \
+ len += sprintf(buf + len, "\n"); \
+ return len; \
+}
+
+#define ata_bitfield_name_search(title, table) \
+static ssize_t \
+get_ata_##title##_names(u32 table_key, char *buf) \
+{ \
+ ssize_t len = 0; \
+ int i; \
+ \
+ for (i = 0; i < ARRAY_SIZE(table); i++) { \
+ if (table[i].value == table_key) { \
+ len += sprintf(buf + len, "%s", \
+ table[i].name); \
+ break; \
+ } \
+ } \
+ len += sprintf(buf + len, "\n"); \
+ return len; \
+}
+
+static struct {
+ u32 value;
+ char *name;
+} ata_class_names[] = {
+ { ATA_DEV_UNKNOWN, "unknown" },
+ { ATA_DEV_ATA, "ata" },
+ { ATA_DEV_ATA_UNSUP, "ata" },
+ { ATA_DEV_ATAPI, "atapi" },
+ { ATA_DEV_ATAPI_UNSUP, "atapi" },
+ { ATA_DEV_PMP, "pmp" },
+ { ATA_DEV_PMP_UNSUP, "pmp" },
+ { ATA_DEV_SEMB, "semb" },
+ { ATA_DEV_SEMB_UNSUP, "semb" },
+ { ATA_DEV_ZAC, "zac" },
+ { ATA_DEV_NONE, "none" }
+};
+ata_bitfield_name_search(class, ata_class_names)
+
+
+static struct {
+ u32 value;
+ char *name;
+} ata_err_names[] = {
+ { AC_ERR_DEV, "DeviceError" },
+ { AC_ERR_HSM, "HostStateMachineError" },
+ { AC_ERR_TIMEOUT, "Timeout" },
+ { AC_ERR_MEDIA, "MediaError" },
+ { AC_ERR_ATA_BUS, "BusError" },
+ { AC_ERR_HOST_BUS, "HostBusError" },
+ { AC_ERR_SYSTEM, "SystemError" },
+ { AC_ERR_INVALID, "InvalidArg" },
+ { AC_ERR_OTHER, "Unknown" },
+ { AC_ERR_NODEV_HINT, "NoDeviceHint" },
+ { AC_ERR_NCQ, "NCQError" }
+};
+ata_bitfield_name_match(err, ata_err_names)
+
+static struct {
+ u32 value;
+ char *name;
+} ata_xfer_names[] = {
+ { XFER_UDMA_7, "XFER_UDMA_7" },
+ { XFER_UDMA_6, "XFER_UDMA_6" },
+ { XFER_UDMA_5, "XFER_UDMA_5" },
+ { XFER_UDMA_4, "XFER_UDMA_4" },
+ { XFER_UDMA_3, "XFER_UDMA_3" },
+ { XFER_UDMA_2, "XFER_UDMA_2" },
+ { XFER_UDMA_1, "XFER_UDMA_1" },
+ { XFER_UDMA_0, "XFER_UDMA_0" },
+ { XFER_MW_DMA_4, "XFER_MW_DMA_4" },
+ { XFER_MW_DMA_3, "XFER_MW_DMA_3" },
+ { XFER_MW_DMA_2, "XFER_MW_DMA_2" },
+ { XFER_MW_DMA_1, "XFER_MW_DMA_1" },
+ { XFER_MW_DMA_0, "XFER_MW_DMA_0" },
+ { XFER_SW_DMA_2, "XFER_SW_DMA_2" },
+ { XFER_SW_DMA_1, "XFER_SW_DMA_1" },
+ { XFER_SW_DMA_0, "XFER_SW_DMA_0" },
+ { XFER_PIO_6, "XFER_PIO_6" },
+ { XFER_PIO_5, "XFER_PIO_5" },
+ { XFER_PIO_4, "XFER_PIO_4" },
+ { XFER_PIO_3, "XFER_PIO_3" },
+ { XFER_PIO_2, "XFER_PIO_2" },
+ { XFER_PIO_1, "XFER_PIO_1" },
+ { XFER_PIO_0, "XFER_PIO_0" },
+ { XFER_PIO_SLOW, "XFER_PIO_SLOW" }
+};
+ata_bitfield_name_match(xfer,ata_xfer_names)
+
+/*
+ * ATA Port attributes
+ */
+#define ata_port_show_simple(field, name, format_string, cast) \
+static ssize_t \
+show_ata_port_##name(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ struct ata_port *ap = transport_class_to_port(dev); \
+ \
+ return snprintf(buf, 20, format_string, cast ap->field); \
+}
+
+#define ata_port_simple_attr(field, name, format_string, type) \
+ ata_port_show_simple(field, name, format_string, (type)) \
+static DEVICE_ATTR(name, S_IRUGO, show_ata_port_##name, NULL)
+
+ata_port_simple_attr(nr_pmp_links, nr_pmp_links, "%d\n", int);
+ata_port_simple_attr(stats.idle_irq, idle_irq, "%ld\n", unsigned long);
+ata_port_simple_attr(local_port_no, port_no, "%u\n", unsigned int);
+
+static DECLARE_TRANSPORT_CLASS(ata_port_class,
+ "ata_port", NULL, NULL, NULL);
+
+static void ata_tport_release(struct device *dev)
+{
+ put_device(dev->parent);
+}
+
+/**
+ * ata_is_port -- check if a struct device represents a ATA port
+ * @dev: device to check
+ *
+ * Returns:
+ * %1 if the device represents a ATA Port, %0 else
+ */
+static int ata_is_port(const struct device *dev)
+{
+ return dev->release == ata_tport_release;
+}
+
+static int ata_tport_match(struct attribute_container *cont,
+ struct device *dev)
+{
+ if (!ata_is_port(dev))
+ return 0;
+ return &ata_scsi_transport_template->host_attrs.ac == cont;
+}
+
+/**
+ * ata_tport_delete -- remove ATA PORT
+ * @port: ATA PORT to remove
+ *
+ * Removes the specified ATA PORT. Remove the associated link as well.
+ */
+void ata_tport_delete(struct ata_port *ap)
+{
+ struct device *dev = &ap->tdev;
+
+ ata_tlink_delete(&ap->link);
+
+ transport_remove_device(dev);
+ device_del(dev);
+ transport_destroy_device(dev);
+ put_device(dev);
+}
+
+/** ata_tport_add - initialize a transport ATA port structure
+ *
+ * @parent: parent device
+ * @ap: existing ata_port structure
+ *
+ * Initialize a ATA port structure for sysfs. It will be added to the device
+ * tree below the device specified by @parent which could be a PCI device.
+ *
+ * Returns %0 on success
+ */
+int ata_tport_add(struct device *parent,
+ struct ata_port *ap)
+{
+ int error;
+ struct device *dev = &ap->tdev;
+
+ device_initialize(dev);
+ dev->type = &ata_port_type;
+
+ dev->parent = get_device(parent);
+ dev->release = ata_tport_release;
+ dev_set_name(dev, "ata%d", ap->print_id);
+ transport_setup_device(dev);
+ ata_acpi_bind_port(ap);
+ error = device_add(dev);
+ if (error) {
+ goto tport_err;
+ }
+
+ device_enable_async_suspend(dev);
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+ pm_runtime_forbid(dev);
+
+ transport_add_device(dev);
+ transport_configure_device(dev);
+
+ error = ata_tlink_add(&ap->link);
+ if (error) {
+ goto tport_link_err;
+ }
+ return 0;
+
+ tport_link_err:
+ transport_remove_device(dev);
+ device_del(dev);
+
+ tport_err:
+ transport_destroy_device(dev);
+ put_device(dev);
+ return error;
+}
+
+
+/*
+ * ATA link attributes
+ */
+static int noop(int x) { return x; }
+
+#define ata_link_show_linkspeed(field, format) \
+static ssize_t \
+show_ata_link_##field(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ struct ata_link *link = transport_class_to_link(dev); \
+ \
+ return sprintf(buf, "%s\n", sata_spd_string(format(link->field))); \
+}
+
+#define ata_link_linkspeed_attr(field, format) \
+ ata_link_show_linkspeed(field, format) \
+static DEVICE_ATTR(field, S_IRUGO, show_ata_link_##field, NULL)
+
+ata_link_linkspeed_attr(hw_sata_spd_limit, fls);
+ata_link_linkspeed_attr(sata_spd_limit, fls);
+ata_link_linkspeed_attr(sata_spd, noop);
+
+
+static DECLARE_TRANSPORT_CLASS(ata_link_class,
+ "ata_link", NULL, NULL, NULL);
+
+static void ata_tlink_release(struct device *dev)
+{
+ put_device(dev->parent);
+}
+
+/**
+ * ata_is_link -- check if a struct device represents a ATA link
+ * @dev: device to check
+ *
+ * Returns:
+ * %1 if the device represents a ATA link, %0 else
+ */
+static int ata_is_link(const struct device *dev)
+{
+ return dev->release == ata_tlink_release;
+}
+
+static int ata_tlink_match(struct attribute_container *cont,
+ struct device *dev)
+{
+ struct ata_internal* i = to_ata_internal(ata_scsi_transport_template);
+ if (!ata_is_link(dev))
+ return 0;
+ return &i->link_attr_cont.ac == cont;
+}
+
+/**
+ * ata_tlink_delete -- remove ATA LINK
+ * @port: ATA LINK to remove
+ *
+ * Removes the specified ATA LINK. remove associated ATA device(s) as well.
+ */
+void ata_tlink_delete(struct ata_link *link)
+{
+ struct device *dev = &link->tdev;
+ struct ata_device *ata_dev;
+
+ ata_for_each_dev(ata_dev, link, ALL) {
+ ata_tdev_delete(ata_dev);
+ }
+
+ transport_remove_device(dev);
+ device_del(dev);
+ transport_destroy_device(dev);
+ put_device(dev);
+}
+
+/**
+ * ata_tlink_add -- initialize a transport ATA link structure
+ * @link: allocated ata_link structure.
+ *
+ * Initialize an ATA LINK structure for sysfs. It will be added in the
+ * device tree below the ATA PORT it belongs to.
+ *
+ * Returns %0 on success
+ */
+int ata_tlink_add(struct ata_link *link)
+{
+ struct device *dev = &link->tdev;
+ struct ata_port *ap = link->ap;
+ struct ata_device *ata_dev;
+ int error;
+
+ device_initialize(dev);
+ dev->parent = get_device(&ap->tdev);
+ dev->release = ata_tlink_release;
+ if (ata_is_host_link(link))
+ dev_set_name(dev, "link%d", ap->print_id);
+ else
+ dev_set_name(dev, "link%d.%d", ap->print_id, link->pmp);
+
+ transport_setup_device(dev);
+
+ error = device_add(dev);
+ if (error) {
+ goto tlink_err;
+ }
+
+ transport_add_device(dev);
+ transport_configure_device(dev);
+
+ ata_for_each_dev(ata_dev, link, ALL) {
+ error = ata_tdev_add(ata_dev);
+ if (error) {
+ goto tlink_dev_err;
+ }
+ }
+ return 0;
+ tlink_dev_err:
+ while (--ata_dev >= link->device) {
+ ata_tdev_delete(ata_dev);
+ }
+ transport_remove_device(dev);
+ device_del(dev);
+ tlink_err:
+ transport_destroy_device(dev);
+ put_device(dev);
+ return error;
+}
+
+/*
+ * ATA device attributes
+ */
+
+#define ata_dev_show_class(title, field) \
+static ssize_t \
+show_ata_dev_##field(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ struct ata_device *ata_dev = transport_class_to_dev(dev); \
+ \
+ return get_ata_##title##_names(ata_dev->field, buf); \
+}
+
+#define ata_dev_attr(title, field) \
+ ata_dev_show_class(title, field) \
+static DEVICE_ATTR(field, S_IRUGO, show_ata_dev_##field, NULL)
+
+ata_dev_attr(class, class);
+ata_dev_attr(xfer, pio_mode);
+ata_dev_attr(xfer, dma_mode);
+ata_dev_attr(xfer, xfer_mode);
+
+
+#define ata_dev_show_simple(field, format_string, cast) \
+static ssize_t \
+show_ata_dev_##field(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ struct ata_device *ata_dev = transport_class_to_dev(dev); \
+ \
+ return snprintf(buf, 20, format_string, cast ata_dev->field); \
+}
+
+#define ata_dev_simple_attr(field, format_string, type) \
+ ata_dev_show_simple(field, format_string, (type)) \
+static DEVICE_ATTR(field, S_IRUGO, \
+ show_ata_dev_##field, NULL)
+
+ata_dev_simple_attr(spdn_cnt, "%d\n", int);
+
+struct ata_show_ering_arg {
+ char* buf;
+ int written;
+};
+
+static int ata_show_ering(struct ata_ering_entry *ent, void *void_arg)
+{
+ struct ata_show_ering_arg* arg = void_arg;
+ struct timespec time;
+
+ jiffies_to_timespec(ent->timestamp,&time);
+ arg->written += sprintf(arg->buf + arg->written,
+ "[%5lu.%06lu]",
+ time.tv_sec, time.tv_nsec);
+ arg->written += get_ata_err_names(ent->err_mask,
+ arg->buf + arg->written);
+ return 0;
+}
+
+static ssize_t
+show_ata_dev_ering(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ata_device *ata_dev = transport_class_to_dev(dev);
+ struct ata_show_ering_arg arg = { buf, 0 };
+
+ ata_ering_map(&ata_dev->ering, ata_show_ering, &arg);
+ return arg.written;
+}
+
+
+static DEVICE_ATTR(ering, S_IRUGO, show_ata_dev_ering, NULL);
+
+static ssize_t
+show_ata_dev_id(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ata_device *ata_dev = transport_class_to_dev(dev);
+ int written = 0, i = 0;
+
+ if (ata_dev->class == ATA_DEV_PMP)
+ return 0;
+ for(i=0;i<ATA_ID_WORDS;i++) {
+ written += snprintf(buf+written, 20, "%04x%c",
+ ata_dev->id[i],
+ ((i+1) & 7) ? ' ' : '\n');
+ }
+ return written;
+}
+
+static DEVICE_ATTR(id, S_IRUGO, show_ata_dev_id, NULL);
+
+static ssize_t
+show_ata_dev_gscr(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ata_device *ata_dev = transport_class_to_dev(dev);
+ int written = 0, i = 0;
+
+ if (ata_dev->class != ATA_DEV_PMP)
+ return 0;
+ for(i=0;i<SATA_PMP_GSCR_DWORDS;i++) {
+ written += snprintf(buf+written, 20, "%08x%c",
+ ata_dev->gscr[i],
+ ((i+1) & 3) ? ' ' : '\n');
+ }
+ if (SATA_PMP_GSCR_DWORDS & 3)
+ buf[written-1] = '\n';
+ return written;
+}
+
+static DEVICE_ATTR(gscr, S_IRUGO, show_ata_dev_gscr, NULL);
+
+static DECLARE_TRANSPORT_CLASS(ata_dev_class,
+ "ata_device", NULL, NULL, NULL);
+
+static void ata_tdev_release(struct device *dev)
+{
+ put_device(dev->parent);
+}
+
+/**
+ * ata_is_ata_dev -- check if a struct device represents a ATA device
+ * @dev: device to check
+ *
+ * Returns:
+ * %1 if the device represents a ATA device, %0 else
+ */
+static int ata_is_ata_dev(const struct device *dev)
+{
+ return dev->release == ata_tdev_release;
+}
+
+static int ata_tdev_match(struct attribute_container *cont,
+ struct device *dev)
+{
+ struct ata_internal* i = to_ata_internal(ata_scsi_transport_template);
+ if (!ata_is_ata_dev(dev))
+ return 0;
+ return &i->dev_attr_cont.ac == cont;
+}
+
+/**
+ * ata_tdev_free -- free a ATA LINK
+ * @dev: ATA PHY to free
+ *
+ * Frees the specified ATA PHY.
+ *
+ * Note:
+ * This function must only be called on a PHY that has not
+ * successfully been added using ata_tdev_add().
+ */
+static void ata_tdev_free(struct ata_device *dev)
+{
+ transport_destroy_device(&dev->tdev);
+ put_device(&dev->tdev);
+}
+
+/**
+ * ata_tdev_delete -- remove ATA device
+ * @port: ATA PORT to remove
+ *
+ * Removes the specified ATA device.
+ */
+static void ata_tdev_delete(struct ata_device *ata_dev)
+{
+ struct device *dev = &ata_dev->tdev;
+
+ transport_remove_device(dev);
+ device_del(dev);
+ ata_tdev_free(ata_dev);
+}
+
+
+/**
+ * ata_tdev_add -- initialize a transport ATA device structure.
+ * @ata_dev: ata_dev structure.
+ *
+ * Initialize an ATA device structure for sysfs. It will be added in the
+ * device tree below the ATA LINK device it belongs to.
+ *
+ * Returns %0 on success
+ */
+static int ata_tdev_add(struct ata_device *ata_dev)
+{
+ struct device *dev = &ata_dev->tdev;
+ struct ata_link *link = ata_dev->link;
+ struct ata_port *ap = link->ap;
+ int error;
+
+ device_initialize(dev);
+ dev->parent = get_device(&link->tdev);
+ dev->release = ata_tdev_release;
+ if (ata_is_host_link(link))
+ dev_set_name(dev, "dev%d.%d", ap->print_id,ata_dev->devno);
+ else
+ dev_set_name(dev, "dev%d.%d.0", ap->print_id, link->pmp);
+
+ transport_setup_device(dev);
+ ata_acpi_bind_dev(ata_dev);
+ error = device_add(dev);
+ if (error) {
+ ata_tdev_free(ata_dev);
+ return error;
+ }
+
+ transport_add_device(dev);
+ transport_configure_device(dev);
+ return 0;
+}
+
+
+/*
+ * Setup / Teardown code
+ */
+
+#define SETUP_TEMPLATE(attrb, field, perm, test) \
+ i->private_##attrb[count] = dev_attr_##field; \
+ i->private_##attrb[count].attr.mode = perm; \
+ i->attrb[count] = &i->private_##attrb[count]; \
+ if (test) \
+ count++
+
+#define SETUP_LINK_ATTRIBUTE(field) \
+ SETUP_TEMPLATE(link_attrs, field, S_IRUGO, 1)
+
+#define SETUP_PORT_ATTRIBUTE(field) \
+ SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
+
+#define SETUP_DEV_ATTRIBUTE(field) \
+ SETUP_TEMPLATE(dev_attrs, field, S_IRUGO, 1)
+
+/**
+ * ata_attach_transport -- instantiate ATA transport template
+ */
+struct scsi_transport_template *ata_attach_transport(void)
+{
+ struct ata_internal *i;
+ int count;
+
+ i = kzalloc(sizeof(struct ata_internal), GFP_KERNEL);
+ if (!i)
+ return NULL;
+
+ i->t.eh_strategy_handler = ata_scsi_error;
+ i->t.eh_timed_out = ata_scsi_timed_out;
+ i->t.user_scan = ata_scsi_user_scan;
+
+ i->t.host_attrs.ac.attrs = &i->port_attrs[0];
+ i->t.host_attrs.ac.class = &ata_port_class.class;
+ i->t.host_attrs.ac.match = ata_tport_match;
+ transport_container_register(&i->t.host_attrs);
+
+ i->link_attr_cont.ac.class = &ata_link_class.class;
+ i->link_attr_cont.ac.attrs = &i->link_attrs[0];
+ i->link_attr_cont.ac.match = ata_tlink_match;
+ transport_container_register(&i->link_attr_cont);
+
+ i->dev_attr_cont.ac.class = &ata_dev_class.class;
+ i->dev_attr_cont.ac.attrs = &i->dev_attrs[0];
+ i->dev_attr_cont.ac.match = ata_tdev_match;
+ transport_container_register(&i->dev_attr_cont);
+
+ count = 0;
+ SETUP_PORT_ATTRIBUTE(nr_pmp_links);
+ SETUP_PORT_ATTRIBUTE(idle_irq);
+ SETUP_PORT_ATTRIBUTE(port_no);
+ BUG_ON(count > ATA_PORT_ATTRS);
+ i->port_attrs[count] = NULL;
+
+ count = 0;
+ SETUP_LINK_ATTRIBUTE(hw_sata_spd_limit);
+ SETUP_LINK_ATTRIBUTE(sata_spd_limit);
+ SETUP_LINK_ATTRIBUTE(sata_spd);
+ BUG_ON(count > ATA_LINK_ATTRS);
+ i->link_attrs[count] = NULL;
+
+ count = 0;
+ SETUP_DEV_ATTRIBUTE(class);
+ SETUP_DEV_ATTRIBUTE(pio_mode);
+ SETUP_DEV_ATTRIBUTE(dma_mode);
+ SETUP_DEV_ATTRIBUTE(xfer_mode);
+ SETUP_DEV_ATTRIBUTE(spdn_cnt);
+ SETUP_DEV_ATTRIBUTE(ering);
+ SETUP_DEV_ATTRIBUTE(id);
+ SETUP_DEV_ATTRIBUTE(gscr);
+ BUG_ON(count > ATA_DEV_ATTRS);
+ i->dev_attrs[count] = NULL;
+
+ return &i->t;
+}
+
+/**
+ * ata_release_transport -- release ATA transport template instance
+ * @t: transport template instance
+ */
+void ata_release_transport(struct scsi_transport_template *t)
+{
+ struct ata_internal *i = to_ata_internal(t);
+
+ transport_container_unregister(&i->t.host_attrs);
+ transport_container_unregister(&i->link_attr_cont);
+ transport_container_unregister(&i->dev_attr_cont);
+
+ kfree(i);
+}
+
+__init int libata_transport_init(void)
+{
+ int error;
+
+ error = transport_class_register(&ata_link_class);
+ if (error)
+ goto out_unregister_transport;
+ error = transport_class_register(&ata_port_class);
+ if (error)
+ goto out_unregister_link;
+ error = transport_class_register(&ata_dev_class);
+ if (error)
+ goto out_unregister_port;
+ return 0;
+
+ out_unregister_port:
+ transport_class_unregister(&ata_port_class);
+ out_unregister_link:
+ transport_class_unregister(&ata_link_class);
+ out_unregister_transport:
+ return error;
+
+}
+
+void __exit libata_transport_exit(void)
+{
+ transport_class_unregister(&ata_link_class);
+ transport_class_unregister(&ata_port_class);
+ transport_class_unregister(&ata_dev_class);
+}
Code Review / kvmfornfv.git / blobdiff