static ssize_t disk_capability_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- struct gendisk *disk = dev_to_disk(dev);
-
- return sprintf(buf, "%x\n", disk->flags);
+ dev_warn_once(dev, "the capability attribute has been deprecated.\n");
+ return sprintf(buf, "0\n");
}
static ssize_t disk_alignment_offset_show(struct device *dev,
.dev_uevent = block_uevent,
};
- static char *block_devnode(struct device *dev, umode_t *mode,
+ static char *block_devnode(const struct device *dev, umode_t *mode,
kuid_t *uid, kgid_t *gid)
{
struct gendisk *disk = dev_to_disk(dev);
complete(&dn->kobj_done);
}
-static struct kobj_type acpi_data_node_ktype = {
+static const struct kobj_type acpi_data_node_ktype = {
.sysfs_ops = &acpi_data_node_sysfs_ops,
.default_groups = acpi_data_node_default_groups,
.release = acpi_data_node_release,
* -EINVAL: output error
* -ENOMEM: output is truncated
*/
- static int create_pnp_modalias(struct acpi_device *acpi_dev, char *modalias,
+ static int create_pnp_modalias(const struct acpi_device *acpi_dev, char *modalias,
int size)
{
int len;
* only be called for devices having ACPI_DT_NAMESPACE_HID in their list of
* ACPI/PNP IDs.
*/
- static int create_of_modalias(struct acpi_device *acpi_dev, char *modalias,
+ static int create_of_modalias(const struct acpi_device *acpi_dev, char *modalias,
int size)
{
struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER };
return len;
}
- int __acpi_device_uevent_modalias(struct acpi_device *adev,
+ int __acpi_device_uevent_modalias(const struct acpi_device *adev,
struct kobj_uevent_env *env)
{
int len;
* Because other buses do not support ACPI HIDs & CIDs, e.g. for a device with
* hid:IBM0001 and cid:ACPI0001 you get: "acpi:IBM0001:ACPI0001".
*/
- int acpi_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env)
+ int acpi_device_uevent_modalias(const struct device *dev, struct kobj_uevent_env *env)
{
return __acpi_device_uevent_modalias(acpi_companion_match(dev), env);
}
static unsigned int defer_sync_state_count = 1;
static DEFINE_MUTEX(fwnode_link_lock);
static bool fw_devlink_is_permissive(void);
+ static void __fw_devlink_link_to_consumers(struct device *dev);
static bool fw_devlink_drv_reg_done;
static bool fw_devlink_best_effort;
/**
- * fwnode_link_add - Create a link between two fwnode_handles.
+ * __fwnode_link_add - Create a link between two fwnode_handles.
* @con: Consumer end of the link.
* @sup: Supplier end of the link.
*
* Attempts to create duplicate links between the same pair of fwnode handles
* are ignored and there is no reference counting.
*/
- int fwnode_link_add(struct fwnode_handle *con, struct fwnode_handle *sup)
+ static int __fwnode_link_add(struct fwnode_handle *con,
+ struct fwnode_handle *sup, u8 flags)
{
struct fwnode_link *link;
- int ret = 0;
-
- mutex_lock(&fwnode_link_lock);
list_for_each_entry(link, &sup->consumers, s_hook)
- if (link->consumer == con)
- goto out;
+ if (link->consumer == con) {
+ link->flags |= flags;
+ return 0;
+ }
link = kzalloc(sizeof(*link), GFP_KERNEL);
- if (!link) {
- ret = -ENOMEM;
- goto out;
- }
+ if (!link)
+ return -ENOMEM;
link->supplier = sup;
INIT_LIST_HEAD(&link->s_hook);
link->consumer = con;
INIT_LIST_HEAD(&link->c_hook);
+ link->flags = flags;
list_add(&link->s_hook, &sup->consumers);
list_add(&link->c_hook, &con->suppliers);
pr_debug("%pfwP Linked as a fwnode consumer to %pfwP\n",
con, sup);
- out:
- mutex_unlock(&fwnode_link_lock);
+ return 0;
+ }
+
+ int fwnode_link_add(struct fwnode_handle *con, struct fwnode_handle *sup)
+ {
+ int ret;
+
+ mutex_lock(&fwnode_link_lock);
+ ret = __fwnode_link_add(con, sup, 0);
+ mutex_unlock(&fwnode_link_lock);
return ret;
}
kfree(link);
}
+ /**
+ * __fwnode_link_cycle - Mark a fwnode link as being part of a cycle.
+ * @link: the fwnode_link to be marked
+ *
+ * The fwnode_link_lock needs to be held when this function is called.
+ */
+ static void __fwnode_link_cycle(struct fwnode_link *link)
+ {
+ pr_debug("%pfwf: Relaxing link with %pfwf\n",
+ link->consumer, link->supplier);
+ link->flags |= FWLINK_FLAG_CYCLE;
+ }
+
/**
* fwnode_links_purge_suppliers - Delete all supplier links of fwnode_handle.
* @fwnode: fwnode whose supplier links need to be deleted
}
EXPORT_SYMBOL_GPL(fw_devlink_purge_absent_suppliers);
-#ifdef CONFIG_SRCU
+ /**
+ * __fwnode_links_move_consumers - Move consumer from @from to @to fwnode_handle
+ * @from: move consumers away from this fwnode
+ * @to: move consumers to this fwnode
+ *
+ * Move all consumer links from @from fwnode to @to fwnode.
+ */
+ static void __fwnode_links_move_consumers(struct fwnode_handle *from,
+ struct fwnode_handle *to)
+ {
+ struct fwnode_link *link, *tmp;
+
+ list_for_each_entry_safe(link, tmp, &from->consumers, s_hook) {
+ __fwnode_link_add(link->consumer, to, link->flags);
+ __fwnode_link_del(link);
+ }
+ }
+
+ /**
+ * __fw_devlink_pickup_dangling_consumers - Pick up dangling consumers
+ * @fwnode: fwnode from which to pick up dangling consumers
+ * @new_sup: fwnode of new supplier
+ *
+ * If the @fwnode has a corresponding struct device and the device supports
+ * probing (that is, added to a bus), then we want to let fw_devlink create
+ * MANAGED device links to this device, so leave @fwnode and its descendant's
+ * fwnode links alone.
+ *
+ * Otherwise, move its consumers to the new supplier @new_sup.
+ */
+ static void __fw_devlink_pickup_dangling_consumers(struct fwnode_handle *fwnode,
+ struct fwnode_handle *new_sup)
+ {
+ struct fwnode_handle *child;
+
+ if (fwnode->dev && fwnode->dev->bus)
+ return;
+
+ fwnode->flags |= FWNODE_FLAG_NOT_DEVICE;
+ __fwnode_links_move_consumers(fwnode, new_sup);
+
+ fwnode_for_each_available_child_node(fwnode, child)
+ __fw_devlink_pickup_dangling_consumers(child, new_sup);
+ }
+
static DEFINE_MUTEX(device_links_lock);
DEFINE_STATIC_SRCU(device_links_srcu);
list_del_rcu(&link->s_node);
list_del_rcu(&link->c_node);
}
-#else /* !CONFIG_SRCU */
-static DECLARE_RWSEM(device_links_lock);
-
-static inline void device_links_write_lock(void)
-{
- down_write(&device_links_lock);
-}
-
-static inline void device_links_write_unlock(void)
-{
- up_write(&device_links_lock);
-}
-
-int device_links_read_lock(void)
-{
- down_read(&device_links_lock);
- return 0;
-}
-
-void device_links_read_unlock(int not_used)
-{
- up_read(&device_links_lock);
-}
-
-#ifdef CONFIG_DEBUG_LOCK_ALLOC
-int device_links_read_lock_held(void)
-{
- return lockdep_is_held(&device_links_lock);
-}
-#endif
-
-static inline void device_link_synchronize_removal(void)
-{
-}
-
-static void device_link_remove_from_lists(struct device_link *link)
-{
- list_del(&link->s_node);
- list_del(&link->c_node);
-}
-#endif /* !CONFIG_SRCU */
static bool device_is_ancestor(struct device *dev, struct device *target)
{
return false;
}
+ static inline bool device_link_flag_is_sync_state_only(u32 flags)
+ {
+ return (flags & ~(DL_FLAG_INFERRED | DL_FLAG_CYCLE)) ==
+ (DL_FLAG_SYNC_STATE_ONLY | DL_FLAG_MANAGED);
+ }
+
/**
* device_is_dependent - Check if one device depends on another one
* @dev: Device to check dependencies for.
return ret;
list_for_each_entry(link, &dev->links.consumers, s_node) {
- if ((link->flags & ~DL_FLAG_INFERRED) ==
- (DL_FLAG_SYNC_STATE_ONLY | DL_FLAG_MANAGED))
+ if (device_link_flag_is_sync_state_only(link->flags))
continue;
if (link->consumer == target)
device_for_each_child(dev, NULL, device_reorder_to_tail);
list_for_each_entry(link, &dev->links.consumers, s_node) {
- if ((link->flags & ~DL_FLAG_INFERRED) ==
- (DL_FLAG_SYNC_STATE_ONLY | DL_FLAG_MANAGED))
+ if (device_link_flag_is_sync_state_only(link->flags))
continue;
device_reorder_to_tail(link->consumer, NULL);
}
DL_FLAG_AUTOREMOVE_SUPPLIER | \
DL_FLAG_AUTOPROBE_CONSUMER | \
DL_FLAG_SYNC_STATE_ONLY | \
- DL_FLAG_INFERRED)
+ DL_FLAG_INFERRED | \
+ DL_FLAG_CYCLE)
#define DL_ADD_VALID_FLAGS (DL_MANAGED_LINK_FLAGS | DL_FLAG_STATELESS | \
DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE)
if (!consumer || !supplier || consumer == supplier ||
flags & ~DL_ADD_VALID_FLAGS ||
(flags & DL_FLAG_STATELESS && flags & DL_MANAGED_LINK_FLAGS) ||
- (flags & DL_FLAG_SYNC_STATE_ONLY &&
- (flags & ~DL_FLAG_INFERRED) != DL_FLAG_SYNC_STATE_ONLY) ||
(flags & DL_FLAG_AUTOPROBE_CONSUMER &&
flags & (DL_FLAG_AUTOREMOVE_CONSUMER |
DL_FLAG_AUTOREMOVE_SUPPLIER)))
if (!(flags & DL_FLAG_STATELESS))
flags |= DL_FLAG_MANAGED;
+ if (flags & DL_FLAG_SYNC_STATE_ONLY &&
+ !device_link_flag_is_sync_state_only(flags))
+ return NULL;
+
device_links_write_lock();
device_pm_lock();
(dev->fwnode && (dev->fwnode->flags & FWNODE_FLAG_BEST_EFFORT));
}
+ static struct fwnode_handle *fwnode_links_check_suppliers(
+ struct fwnode_handle *fwnode)
+ {
+ struct fwnode_link *link;
+
+ if (!fwnode || fw_devlink_is_permissive())
+ return NULL;
+
+ list_for_each_entry(link, &fwnode->suppliers, c_hook)
+ if (!(link->flags & FWLINK_FLAG_CYCLE))
+ return link->supplier;
+
+ return NULL;
+ }
+
/**
* device_links_check_suppliers - Check presence of supplier drivers.
* @dev: Consumer device.
* probe.
*/
mutex_lock(&fwnode_link_lock);
- if (dev->fwnode && !list_empty(&dev->fwnode->suppliers) &&
- !fw_devlink_is_permissive()) {
- sup_fw = list_first_entry(&dev->fwnode->suppliers,
- struct fwnode_link,
- c_hook)->supplier;
+ sup_fw = fwnode_links_check_suppliers(dev->fwnode);
+ if (sup_fw) {
if (!dev_is_best_effort(dev)) {
fwnode_ret = -EPROBE_DEFER;
dev_err_probe(dev, -EPROBE_DEFER,
bool val;
device_lock(dev);
- val = !list_empty(&dev->fwnode->suppliers);
+ mutex_lock(&fwnode_link_lock);
+ val = !!fwnode_links_check_suppliers(dev->fwnode);
+ mutex_unlock(&fwnode_link_lock);
device_unlock(dev);
return sysfs_emit(buf, "%u\n", val);
}
* them. So, fw_devlink no longer needs to create device links to any
* of the device's suppliers.
*
- * Also, if a child firmware node of this bound device is not added as
- * a device by now, assume it is never going to be added and make sure
- * other devices don't defer probe indefinitely by waiting for such a
- * child device.
+ * Also, if a child firmware node of this bound device is not added as a
+ * device by now, assume it is never going to be added. Make this bound
+ * device the fallback supplier to the dangling consumers of the child
+ * firmware node because this bound device is probably implementing the
+ * child firmware node functionality and we don't want the dangling
+ * consumers to defer probe indefinitely waiting for a device for the
+ * child firmware node.
*/
if (dev->fwnode && dev->fwnode->dev == dev) {
struct fwnode_handle *child;
fwnode_links_purge_suppliers(dev->fwnode);
+ mutex_lock(&fwnode_link_lock);
fwnode_for_each_available_child_node(dev->fwnode, child)
- fw_devlink_purge_absent_suppliers(child);
+ __fw_devlink_pickup_dangling_consumers(child,
+ dev->fwnode);
+ __fw_devlink_link_to_consumers(dev);
+ mutex_unlock(&fwnode_link_lock);
}
device_remove_file(dev, &dev_attr_waiting_for_supplier);
}
early_param("fw_devlink.strict", fw_devlink_strict_setup);
- u32 fw_devlink_get_flags(void)
+ static inline u32 fw_devlink_get_flags(u8 fwlink_flags)
{
+ if (fwlink_flags & FWLINK_FLAG_CYCLE)
+ return FW_DEVLINK_FLAGS_PERMISSIVE | DL_FLAG_CYCLE;
+
return fw_devlink_flags;
}
if (!(link->flags & DL_FLAG_INFERRED))
return;
- if (link->flags == (DL_FLAG_MANAGED | FW_DEVLINK_FLAGS_PERMISSIVE))
+ if (device_link_flag_is_sync_state_only(link->flags))
return;
pm_runtime_drop_link(link);
device_links_write_unlock();
}
+
+ static bool fwnode_init_without_drv(struct fwnode_handle *fwnode)
+ {
+ struct device *dev;
+ bool ret;
+
+ if (!(fwnode->flags & FWNODE_FLAG_INITIALIZED))
+ return false;
+
+ dev = get_dev_from_fwnode(fwnode);
+ ret = !dev || dev->links.status == DL_DEV_NO_DRIVER;
+ put_device(dev);
+
+ return ret;
+ }
+
+ static bool fwnode_ancestor_init_without_drv(struct fwnode_handle *fwnode)
+ {
+ struct fwnode_handle *parent;
+
+ fwnode_for_each_parent_node(fwnode, parent) {
+ if (fwnode_init_without_drv(parent)) {
+ fwnode_handle_put(parent);
+ return true;
+ }
+ }
+
+ return false;
+ }
+
/**
- * fw_devlink_relax_cycle - Convert cyclic links to SYNC_STATE_ONLY links
- * @con: Device to check dependencies for.
- * @sup: Device to check against.
- *
- * Check if @sup depends on @con or any device dependent on it (its child or
- * its consumer etc). When such a cyclic dependency is found, convert all
- * device links created solely by fw_devlink into SYNC_STATE_ONLY device links.
- * This is the equivalent of doing fw_devlink=permissive just between the
- * devices in the cycle. We need to do this because, at this point, fw_devlink
- * can't tell which of these dependencies is not a real dependency.
- *
- * Return 1 if a cycle is found. Otherwise, return 0.
+ * __fw_devlink_relax_cycles - Relax and mark dependency cycles.
+ * @con: Potential consumer device.
+ * @sup_handle: Potential supplier's fwnode.
+ *
+ * Needs to be called with fwnode_lock and device link lock held.
+ *
+ * Check if @sup_handle or any of its ancestors or suppliers direct/indirectly
+ * depend on @con. This function can detect multiple cyles between @sup_handle
+ * and @con. When such dependency cycles are found, convert all device links
+ * created solely by fw_devlink into SYNC_STATE_ONLY device links. Also, mark
+ * all fwnode links in the cycle with FWLINK_FLAG_CYCLE so that when they are
+ * converted into a device link in the future, they are created as
+ * SYNC_STATE_ONLY device links. This is the equivalent of doing
+ * fw_devlink=permissive just between the devices in the cycle. We need to do
+ * this because, at this point, fw_devlink can't tell which of these
+ * dependencies is not a real dependency.
+ *
+ * Return true if one or more cycles were found. Otherwise, return false.
*/
- static int fw_devlink_relax_cycle(struct device *con, void *sup)
+ static bool __fw_devlink_relax_cycles(struct device *con,
+ struct fwnode_handle *sup_handle)
{
- struct device_link *link;
- int ret;
+ struct device *sup_dev = NULL, *par_dev = NULL;
+ struct fwnode_link *link;
+ struct device_link *dev_link;
+ bool ret = false;
- if (con == sup)
- return 1;
+ if (!sup_handle)
+ return false;
- ret = device_for_each_child(con, sup, fw_devlink_relax_cycle);
- if (ret)
- return ret;
+ /*
+ * We aren't trying to find all cycles. Just a cycle between con and
+ * sup_handle.
+ */
+ if (sup_handle->flags & FWNODE_FLAG_VISITED)
+ return false;
- list_for_each_entry(link, &con->links.consumers, s_node) {
- if ((link->flags & ~DL_FLAG_INFERRED) ==
- (DL_FLAG_SYNC_STATE_ONLY | DL_FLAG_MANAGED))
- continue;
+ sup_handle->flags |= FWNODE_FLAG_VISITED;
- if (!fw_devlink_relax_cycle(link->consumer, sup))
- continue;
+ sup_dev = get_dev_from_fwnode(sup_handle);
- ret = 1;
+ /* Termination condition. */
+ if (sup_dev == con) {
+ ret = true;
+ goto out;
+ }
- fw_devlink_relax_link(link);
+ /*
+ * If sup_dev is bound to a driver and @con hasn't started binding to a
+ * driver, sup_dev can't be a consumer of @con. So, no need to check
+ * further.
+ */
+ if (sup_dev && sup_dev->links.status == DL_DEV_DRIVER_BOUND &&
+ con->links.status == DL_DEV_NO_DRIVER) {
+ ret = false;
+ goto out;
+ }
+
+ list_for_each_entry(link, &sup_handle->suppliers, c_hook) {
+ if (__fw_devlink_relax_cycles(con, link->supplier)) {
+ __fwnode_link_cycle(link);
+ ret = true;
+ }
}
+
+ /*
+ * Give priority to device parent over fwnode parent to account for any
+ * quirks in how fwnodes are converted to devices.
+ */
+ if (sup_dev)
+ par_dev = get_device(sup_dev->parent);
+ else
+ par_dev = fwnode_get_next_parent_dev(sup_handle);
+
+ if (par_dev && __fw_devlink_relax_cycles(con, par_dev->fwnode))
+ ret = true;
+
+ if (!sup_dev)
+ goto out;
+
+ list_for_each_entry(dev_link, &sup_dev->links.suppliers, c_node) {
+ /*
+ * Ignore a SYNC_STATE_ONLY flag only if it wasn't marked as
+ * such due to a cycle.
+ */
+ if (device_link_flag_is_sync_state_only(dev_link->flags) &&
+ !(dev_link->flags & DL_FLAG_CYCLE))
+ continue;
+
+ if (__fw_devlink_relax_cycles(con,
+ dev_link->supplier->fwnode)) {
+ fw_devlink_relax_link(dev_link);
+ dev_link->flags |= DL_FLAG_CYCLE;
+ ret = true;
+ }
+ }
+
+ out:
+ sup_handle->flags &= ~FWNODE_FLAG_VISITED;
+ put_device(sup_dev);
+ put_device(par_dev);
return ret;
}
* fw_devlink_create_devlink - Create a device link from a consumer to fwnode
* @con: consumer device for the device link
* @sup_handle: fwnode handle of supplier
- * @flags: devlink flags
+ * @link: fwnode link that's being converted to a device link
*
* This function will try to create a device link between the consumer device
* @con and the supplier device represented by @sup_handle.
* possible to do that in the future
*/
static int fw_devlink_create_devlink(struct device *con,
- struct fwnode_handle *sup_handle, u32 flags)
+ struct fwnode_handle *sup_handle,
+ struct fwnode_link *link)
{
struct device *sup_dev;
int ret = 0;
+ u32 flags;
+
+ if (con->fwnode == link->consumer)
+ flags = fw_devlink_get_flags(link->flags);
+ else
+ flags = FW_DEVLINK_FLAGS_PERMISSIVE;
/*
* In some cases, a device P might also be a supplier to its child node
fwnode_is_ancestor_of(sup_handle, con->fwnode))
return -EINVAL;
- sup_dev = get_dev_from_fwnode(sup_handle);
+ /*
+ * SYNC_STATE_ONLY device links don't block probing and supports cycles.
+ * So cycle detection isn't necessary and shouldn't be done.
+ */
+ if (!(flags & DL_FLAG_SYNC_STATE_ONLY)) {
+ device_links_write_lock();
+ if (__fw_devlink_relax_cycles(con, sup_handle)) {
+ __fwnode_link_cycle(link);
+ flags = fw_devlink_get_flags(link->flags);
+ dev_info(con, "Fixed dependency cycle(s) with %pfwf\n",
+ sup_handle);
+ }
+ device_links_write_unlock();
+ }
+
+ if (sup_handle->flags & FWNODE_FLAG_NOT_DEVICE)
+ sup_dev = fwnode_get_next_parent_dev(sup_handle);
+ else
+ sup_dev = get_dev_from_fwnode(sup_handle);
+
if (sup_dev) {
/*
* If it's one of those drivers that don't actually bind to
*/
if (sup_dev->links.status == DL_DEV_NO_DRIVER &&
sup_handle->flags & FWNODE_FLAG_INITIALIZED) {
+ dev_dbg(con,
+ "Not linking %pfwf - dev might never probe\n",
+ sup_handle);
ret = -EINVAL;
goto out;
}
- /*
- * If this fails, it is due to cycles in device links. Just
- * give up on this link and treat it as invalid.
- */
- if (!device_link_add(con, sup_dev, flags) &&
- !(flags & DL_FLAG_SYNC_STATE_ONLY)) {
- dev_info(con, "Fixing up cyclic dependency with %s\n",
- dev_name(sup_dev));
- device_links_write_lock();
- fw_devlink_relax_cycle(con, sup_dev);
- device_links_write_unlock();
- device_link_add(con, sup_dev,
- FW_DEVLINK_FLAGS_PERMISSIVE);
+ if (!device_link_add(con, sup_dev, flags)) {
+ dev_err(con, "Failed to create device link with %s\n",
+ dev_name(sup_dev));
ret = -EINVAL;
}
goto out;
}
- /* Supplier that's already initialized without a struct device. */
- if (sup_handle->flags & FWNODE_FLAG_INITIALIZED)
- return -EINVAL;
-
- /*
- * DL_FLAG_SYNC_STATE_ONLY doesn't block probing and supports
- * cycles. So cycle detection isn't necessary and shouldn't be
- * done.
- */
- if (flags & DL_FLAG_SYNC_STATE_ONLY)
- return -EAGAIN;
-
/*
- * If we can't find the supplier device from its fwnode, it might be
- * due to a cyclic dependency between fwnodes. Some of these cycles can
- * be broken by applying logic. Check for these types of cycles and
- * break them so that devices in the cycle probe properly.
- *
- * If the supplier's parent is dependent on the consumer, then the
- * consumer and supplier have a cyclic dependency. Since fw_devlink
- * can't tell which of the inferred dependencies are incorrect, don't
- * enforce probe ordering between any of the devices in this cyclic
- * dependency. Do this by relaxing all the fw_devlink device links in
- * this cycle and by treating the fwnode link between the consumer and
- * the supplier as an invalid dependency.
+ * Supplier or supplier's ancestor already initialized without a struct
+ * device or being probed by a driver.
*/
- sup_dev = fwnode_get_next_parent_dev(sup_handle);
- if (sup_dev && device_is_dependent(con, sup_dev)) {
- dev_info(con, "Fixing up cyclic dependency with %pfwP (%s)\n",
- sup_handle, dev_name(sup_dev));
- device_links_write_lock();
- fw_devlink_relax_cycle(con, sup_dev);
- device_links_write_unlock();
- ret = -EINVAL;
- } else {
- /*
- * Can't check for cycles or no cycles. So let's try
- * again later.
- */
- ret = -EAGAIN;
+ if (fwnode_init_without_drv(sup_handle) ||
+ fwnode_ancestor_init_without_drv(sup_handle)) {
+ dev_dbg(con, "Not linking %pfwf - might never become dev\n",
+ sup_handle);
+ return -EINVAL;
}
+ ret = -EAGAIN;
out:
put_device(sup_dev);
return ret;
struct fwnode_link *link, *tmp;
list_for_each_entry_safe(link, tmp, &fwnode->consumers, s_hook) {
- u32 dl_flags = fw_devlink_get_flags();
struct device *con_dev;
bool own_link = true;
int ret;
con_dev = NULL;
} else {
own_link = false;
- dl_flags = FW_DEVLINK_FLAGS_PERMISSIVE;
}
}
if (!con_dev)
continue;
- ret = fw_devlink_create_devlink(con_dev, fwnode, dl_flags);
+ ret = fw_devlink_create_devlink(con_dev, fwnode, link);
put_device(con_dev);
if (!own_link || ret == -EAGAIN)
continue;
*
* The function creates normal (non-SYNC_STATE_ONLY) device links between @dev
* and the real suppliers of @dev. Once these device links are created, the
- * fwnode links are deleted. When such device links are successfully created,
- * this function is called recursively on those supplier devices. This is
- * needed to detect and break some invalid cycles in fwnode links. See
- * fw_devlink_create_devlink() for more details.
+ * fwnode links are deleted.
*
* In addition, it also looks at all the suppliers of the entire fwnode tree
* because some of the child devices of @dev that have not been added yet
bool own_link = (dev->fwnode == fwnode);
struct fwnode_link *link, *tmp;
struct fwnode_handle *child = NULL;
- u32 dl_flags;
-
- if (own_link)
- dl_flags = fw_devlink_get_flags();
- else
- dl_flags = FW_DEVLINK_FLAGS_PERMISSIVE;
list_for_each_entry_safe(link, tmp, &fwnode->suppliers, c_hook) {
int ret;
- struct device *sup_dev;
struct fwnode_handle *sup = link->supplier;
- ret = fw_devlink_create_devlink(dev, sup, dl_flags);
+ ret = fw_devlink_create_devlink(dev, sup, link);
if (!own_link || ret == -EAGAIN)
continue;
__fwnode_link_del(link);
-
- /* If no device link was created, nothing more to do. */
- if (ret)
- continue;
-
- /*
- * If a device link was successfully created to a supplier, we
- * now need to try and link the supplier to all its suppliers.
- *
- * This is needed to detect and delete false dependencies in
- * fwnode links that haven't been converted to a device link
- * yet. See comments in fw_devlink_create_devlink() for more
- * details on the false dependency.
- *
- * Without deleting these false dependencies, some devices will
- * never probe because they'll keep waiting for their false
- * dependency fwnode links to be converted to device links.
- */
- sup_dev = get_dev_from_fwnode(sup);
- __fw_devlink_link_to_suppliers(sup_dev, sup_dev->fwnode);
- put_device(sup_dev);
}
/*
dev->class->get_ownership(dev, uid, gid);
}
- static struct kobj_type device_ktype = {
+ static const struct kobj_type device_ktype = {
.release = device_release,
.sysfs_ops = &dev_sysfs_ops,
.namespace = device_namespace,
return NULL;
}
- static int dev_uevent(struct kobject *kobj, struct kobj_uevent_env *env)
+ static int dev_uevent(const struct kobject *kobj, struct kobj_uevent_env *env)
{
- struct device *dev = kobj_to_dev(kobj);
+ const struct device *dev = kobj_to_dev(kobj);
int retval = 0;
/* add device node properties if present */
return dir->class->ns_type;
}
- static struct kobj_type class_dir_ktype = {
+ static const struct kobj_type class_dir_ktype = {
.release = class_dir_release,
.sysfs_ops = &kobj_sysfs_ops,
.child_ns_type = class_dir_child_ns_type
static struct kobject *get_device_parent(struct device *dev,
struct device *parent)
{
+ struct kobject *kobj = NULL;
+
if (dev->class) {
- struct kobject *kobj = NULL;
struct kobject *parent_kobj;
struct kobject *k;
}
/* subsystems can specify a default root directory for their devices */
- if (!parent && dev->bus && dev->bus->dev_root)
- return &dev->bus->dev_root->kobj;
+ if (!parent && dev->bus) {
+ struct device *dev_root = bus_get_dev_root(dev->bus);
+
+ if (dev_root) {
+ kobj = &dev_root->kobj;
+ put_device(dev_root);
+ return kobj;
+ }
+ }
if (parent)
return &parent->kobj;
/* we require the name to be set before, and pass NULL */
error = kobject_add(&dev->kobj, dev->kobj.parent, NULL);
if (error) {
- glue_dir = get_glue_dir(dev);
+ glue_dir = kobj;
goto Error;
}
/* Notify clients of device addition. This call must come
* after dpm_sysfs_add() and before kobject_uevent().
*/
- if (dev->bus)
- blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
- BUS_NOTIFY_ADD_DEVICE, dev);
-
+ bus_notify(dev, BUS_NOTIFY_ADD_DEVICE);
kobject_uevent(&dev->kobj, KOBJ_ADD);
/*
device_pm_remove(dev);
dpm_sysfs_remove(dev);
DPMError:
+ dev->driver = NULL;
bus_remove_device(dev);
BusError:
device_remove_attrs(dev);
* before dpm_sysfs_remove().
*/
noio_flag = memalloc_noio_save();
- if (dev->bus)
- blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
- BUS_NOTIFY_DEL_DEVICE, dev);
+ bus_notify(dev, BUS_NOTIFY_DEL_DEVICE);
dpm_sysfs_remove(dev);
if (parent)
device_platform_notify_remove(dev);
device_links_purge(dev);
- if (dev->bus)
- blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
- BUS_NOTIFY_REMOVED_DEVICE, dev);
+ bus_notify(dev, BUS_NOTIFY_REMOVED_DEVICE);
kobject_uevent(&dev->kobj, KOBJ_REMOVE);
glue_dir = get_glue_dir(dev);
kobject_del(&dev->kobj);
* a name. This memory is returned in tmp and needs to be
* freed by the caller.
*/
- const char *device_get_devnode(struct device *dev,
+ const char *device_get_devnode(const struct device *dev,
umode_t *mode, kuid_t *uid, kgid_t *gid,
const char **tmp)
{
* overwrite the default setting if needed.
*/
+ #define pr_fmt(fmt) "devtmpfs: " fmt
+
#include <linux/kernel.h>
#include <linux/syscalls.h>
#include <linux/mount.h>
if (IS_ERR(dentry))
return PTR_ERR(dentry);
- err = vfs_mkdir(&init_user_ns, d_inode(path.dentry), dentry, mode);
+ err = vfs_mkdir(&nop_mnt_idmap, d_inode(path.dentry), dentry, mode);
if (!err)
/* mark as kernel-created inode */
d_inode(dentry)->i_private = &thread;
if (IS_ERR(dentry))
return PTR_ERR(dentry);
- err = vfs_mknod(&init_user_ns, d_inode(path.dentry), dentry, mode,
+ err = vfs_mknod(&nop_mnt_idmap, d_inode(path.dentry), dentry, mode,
dev->devt);
if (!err) {
struct iattr newattrs;
newattrs.ia_gid = gid;
newattrs.ia_valid = ATTR_MODE|ATTR_UID|ATTR_GID;
inode_lock(d_inode(dentry));
- notify_change(&init_user_ns, dentry, &newattrs, NULL);
+ notify_change(&nop_mnt_idmap, dentry, &newattrs, NULL);
inode_unlock(d_inode(dentry));
/* mark as kernel-created inode */
return PTR_ERR(dentry);
if (d_really_is_positive(dentry)) {
if (d_inode(dentry)->i_private == &thread)
- err = vfs_rmdir(&init_user_ns, d_inode(parent.dentry),
+ err = vfs_rmdir(&nop_mnt_idmap, d_inode(parent.dentry),
dentry);
else
err = -EPERM;
newattrs.ia_valid =
ATTR_UID|ATTR_GID|ATTR_MODE;
inode_lock(d_inode(dentry));
- notify_change(&init_user_ns, dentry, &newattrs, NULL);
+ notify_change(&nop_mnt_idmap, dentry, &newattrs, NULL);
inode_unlock(d_inode(dentry));
- err = vfs_unlink(&init_user_ns, d_inode(parent.dentry),
+ err = vfs_unlink(&nop_mnt_idmap, d_inode(parent.dentry),
dentry, NULL);
if (!err || err == -ENOENT)
deleted = 1;
err = init_mount("devtmpfs", "dev", "devtmpfs", DEVTMPFS_MFLAGS, NULL);
if (err)
- printk(KERN_INFO "devtmpfs: error mounting %i\n", err);
+ pr_info("error mounting %d\n", err);
else
- printk(KERN_INFO "devtmpfs: mounted\n");
+ pr_info("mounted\n");
return err;
}
mnt = vfs_kern_mount(&internal_fs_type, 0, "devtmpfs", opts);
if (IS_ERR(mnt)) {
- printk(KERN_ERR "devtmpfs: unable to create devtmpfs %ld\n",
- PTR_ERR(mnt));
+ pr_err("unable to create devtmpfs %ld\n", PTR_ERR(mnt));
return PTR_ERR(mnt);
}
err = register_filesystem(&dev_fs_type);
if (err) {
- printk(KERN_ERR "devtmpfs: unable to register devtmpfs "
- "type %i\n", err);
+ pr_err("unable to register devtmpfs type %d\n", err);
return err;
}
}
if (err) {
- printk(KERN_ERR "devtmpfs: unable to create devtmpfs %i\n", err);
+ pr_err("unable to create devtmpfs %d\n", err);
unregister_filesystem(&dev_fs_type);
thread = NULL;
return err;
}
- printk(KERN_INFO "devtmpfs: initialized\n");
+ pr_info("initialized\n");
return 0;
}
int ret;
ch_id = MHI_TRE_GET_CMD_CHID(el);
+
+ /* Check if the channel is supported by the controller */
+ if ((ch_id >= mhi_cntrl->max_chan) || !mhi_cntrl->mhi_chan[ch_id].name) {
+ dev_err(dev, "Channel (%u) not supported!\n", ch_id);
+ return -ENODEV;
+ }
+
mhi_chan = &mhi_cntrl->mhi_chan[ch_id];
ch_ring = &mhi_cntrl->mhi_chan[ch_id].ring;
mhi_ep_mmio_disable_chdb(mhi_cntrl, ch_id);
/* Send channel disconnect status to client drivers */
- result.transaction_status = -ENOTCONN;
- result.bytes_xferd = 0;
- mhi_chan->xfer_cb(mhi_chan->mhi_dev, &result);
+ if (mhi_chan->xfer_cb) {
+ result.transaction_status = -ENOTCONN;
+ result.bytes_xferd = 0;
+ mhi_chan->xfer_cb(mhi_chan->mhi_dev, &result);
+ }
/* Set channel state to STOP */
mhi_chan->state = MHI_CH_STATE_STOP;
mutex_unlock(&mhi_chan->lock);
break;
case MHI_PKT_TYPE_RESET_CHAN_CMD:
- dev_dbg(dev, "Received STOP command for channel (%u)\n", ch_id);
+ dev_dbg(dev, "Received RESET command for channel (%u)\n", ch_id);
if (!ch_ring->started) {
dev_err(dev, "Channel (%u) not opened\n", ch_id);
return -ENODEV;
mhi_ep_ring_reset(mhi_cntrl, ch_ring);
/* Send channel disconnect status to client driver */
- result.transaction_status = -ENOTCONN;
- result.bytes_xferd = 0;
- mhi_chan->xfer_cb(mhi_chan->mhi_dev, &result);
+ if (mhi_chan->xfer_cb) {
+ result.transaction_status = -ENOTCONN;
+ result.bytes_xferd = 0;
+ mhi_chan->xfer_cb(mhi_chan->mhi_dev, &result);
+ }
/* Set channel state to DISABLED */
mhi_chan->state = MHI_CH_STATE_DISABLED;
list_del(&itr->node);
ring = itr->ring;
+ chan = &mhi_cntrl->mhi_chan[ring->ch_id];
+ mutex_lock(&chan->lock);
+
+ /*
+ * The ring could've stopped while we waited to grab the (chan->lock), so do
+ * a sanity check before going further.
+ */
+ if (!ring->started) {
+ mutex_unlock(&chan->lock);
+ kfree(itr);
+ continue;
+ }
+
/* Update the write offset for the ring */
ret = mhi_ep_update_wr_offset(ring);
if (ret) {
dev_err(dev, "Error updating write offset for ring\n");
+ mutex_unlock(&chan->lock);
kfree(itr);
continue;
}
/* Sanity check to make sure there are elements in the ring */
if (ring->rd_offset == ring->wr_offset) {
+ mutex_unlock(&chan->lock);
kfree(itr);
continue;
}
el = &ring->ring_cache[ring->rd_offset];
- chan = &mhi_cntrl->mhi_chan[ring->ch_id];
- mutex_lock(&chan->lock);
dev_dbg(dev, "Processing the ring for channel (%u)\n", ring->ch_id);
ret = mhi_ep_process_ch_ring(ring, el);
if (ret) {
static void mhi_ep_reset_worker(struct work_struct *work)
{
struct mhi_ep_cntrl *mhi_cntrl = container_of(work, struct mhi_ep_cntrl, reset_work);
- struct device *dev = &mhi_cntrl->mhi_dev->dev;
enum mhi_state cur_state;
- int ret;
- mhi_ep_abort_transfer(mhi_cntrl);
+ mhi_ep_power_down(mhi_cntrl);
+
+ mutex_lock(&mhi_cntrl->state_lock);
- spin_lock_bh(&mhi_cntrl->state_lock);
/* Reset MMIO to signal host that the MHI_RESET is completed in endpoint */
mhi_ep_mmio_reset(mhi_cntrl);
cur_state = mhi_cntrl->mhi_state;
- spin_unlock_bh(&mhi_cntrl->state_lock);
/*
* Only proceed further if the reset is due to SYS_ERR. The host will
* issue reset during shutdown also and we don't need to do re-init in
* that case.
*/
- if (cur_state == MHI_STATE_SYS_ERR) {
- mhi_ep_mmio_init(mhi_cntrl);
-
- /* Set AMSS EE before signaling ready state */
- mhi_ep_mmio_set_env(mhi_cntrl, MHI_EE_AMSS);
-
- /* All set, notify the host that we are ready */
- ret = mhi_ep_set_ready_state(mhi_cntrl);
- if (ret)
- return;
-
- dev_dbg(dev, "READY state notification sent to the host\n");
-
- ret = mhi_ep_enable(mhi_cntrl);
- if (ret) {
- dev_err(dev, "Failed to enable MHI endpoint: %d\n", ret);
- return;
- }
+ if (cur_state == MHI_STATE_SYS_ERR)
+ mhi_ep_power_up(mhi_cntrl);
- enable_irq(mhi_cntrl->irq);
- }
+ mutex_unlock(&mhi_cntrl->state_lock);
}
/*
void mhi_ep_power_down(struct mhi_ep_cntrl *mhi_cntrl)
{
- if (mhi_cntrl->enabled)
+ if (mhi_cntrl->enabled) {
mhi_ep_abort_transfer(mhi_cntrl);
-
- kfree(mhi_cntrl->mhi_event);
- disable_irq(mhi_cntrl->irq);
+ kfree(mhi_cntrl->mhi_event);
+ disable_irq(mhi_cntrl->irq);
+ }
}
EXPORT_SYMBOL_GPL(mhi_ep_power_down);
dev_dbg(&mhi_chan->mhi_dev->dev, "Suspending channel\n");
/* Set channel state to SUSPENDED */
+ mhi_chan->state = MHI_CH_STATE_SUSPENDED;
tmp &= ~CHAN_CTX_CHSTATE_MASK;
tmp |= FIELD_PREP(CHAN_CTX_CHSTATE_MASK, MHI_CH_STATE_SUSPENDED);
mhi_cntrl->ch_ctx_cache[i].chcfg = cpu_to_le32(tmp);
dev_dbg(&mhi_chan->mhi_dev->dev, "Resuming channel\n");
/* Set channel state to RUNNING */
+ mhi_chan->state = MHI_CH_STATE_RUNNING;
tmp &= ~CHAN_CTX_CHSTATE_MASK;
tmp |= FIELD_PREP(CHAN_CTX_CHSTATE_MASK, MHI_CH_STATE_RUNNING);
mhi_cntrl->ch_ctx_cache[i].chcfg = cpu_to_le32(tmp);
INIT_LIST_HEAD(&mhi_cntrl->st_transition_list);
INIT_LIST_HEAD(&mhi_cntrl->ch_db_list);
- spin_lock_init(&mhi_cntrl->state_lock);
spin_lock_init(&mhi_cntrl->list_lock);
+ mutex_init(&mhi_cntrl->state_lock);
mutex_init(&mhi_cntrl->event_lock);
/* Set MHI version and AMSS EE before enumeration */
}
EXPORT_SYMBOL_GPL(mhi_ep_driver_unregister);
- static int mhi_ep_uevent(struct device *dev, struct kobj_uevent_env *env)
+ static int mhi_ep_uevent(const struct device *dev, struct kobj_uevent_env *env)
{
- struct mhi_ep_device *mhi_dev = to_mhi_ep_device(dev);
+ const struct mhi_ep_device *mhi_dev = to_mhi_ep_device(dev);
return add_uevent_var(env, "MODALIAS=" MHI_EP_DEVICE_MODALIAS_FMT,
mhi_dev->name);
}
EXPORT_SYMBOL_GPL(mhi_driver_unregister);
- static int mhi_uevent(struct device *dev, struct kobj_uevent_env *env)
+ static int mhi_uevent(const struct device *dev, struct kobj_uevent_env *env)
{
- struct mhi_device *mhi_dev = to_mhi_device(dev);
+ const struct mhi_device *mhi_dev = to_mhi_device(dev);
return add_uevent_var(env, "MODALIAS=" MHI_DEVICE_MODALIAS_FMT,
mhi_dev->name);
module_exit(mhi_exit);
MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("MHI Host Interface");
+MODULE_DESCRIPTION("Modem Host Interface");
drv->remove(to_sunxi_rsb_device(dev));
}
+ static int sunxi_rsb_device_modalias(const struct device *dev, struct kobj_uevent_env *env)
+ {
+ return of_device_uevent_modalias(dev, env);
+ }
+
static struct bus_type sunxi_rsb_bus = {
.name = RSB_CTRL_NAME,
.match = sunxi_rsb_device_match,
.probe = sunxi_rsb_device_probe,
.remove = sunxi_rsb_device_remove,
- .uevent = of_device_uevent_modalias,
+ .uevent = sunxi_rsb_device_modalias,
};
static void sunxi_rsb_dev_release(struct device *dev)
return ret;
}
- return platform_driver_register(&sunxi_rsb_driver);
+ ret = platform_driver_register(&sunxi_rsb_driver);
+ if (ret) {
+ bus_unregister(&sunxi_rsb_bus);
+ return ret;
+ }
+
+ return 0;
}
module_init(sunxi_rsb_init);
#include <linux/dfl.h>
#include <linux/fpga-dfl.h>
#include <linux/module.h>
+#include <linux/overflow.h>
#include <linux/uaccess.h>
#include "dfl.h"
};
/**
- * dfl_dev_info - dfl feature device information.
+ * struct dfl_dev_info - dfl feature device information.
* @name: name string of the feature platform device.
* @dfh_id: id value in Device Feature Header (DFH) register by DFL spec.
* @id: idr id of the feature dev.
};
/**
- * dfl_chardev_info - chardev information of dfl feature device
+ * struct dfl_chardev_info - chardev information of dfl feature device
* @name: nmae string of the char device.
* @devt: devt of the char device.
*/
ddrv->remove(ddev);
}
- static int dfl_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
+ static int dfl_bus_uevent(const struct device *dev, struct kobj_uevent_env *env)
{
- struct dfl_device *ddev = to_dfl_dev(dev);
+ const struct dfl_device *ddev = to_dfl_dev(dev);
return add_uevent_var(env, "MODALIAS=dfl:t%04Xf%04X",
ddev->type, ddev->feature_id);
if (ddev->mmio_res.parent)
release_resource(&ddev->mmio_res);
+ kfree(ddev->params);
+
ida_free(&dfl_device_ida, ddev->id);
kfree(ddev->irqs);
kfree(ddev);
ddev->type = feature_dev_id_type(pdev);
ddev->feature_id = feature->id;
ddev->revision = feature->revision;
+ ddev->dfh_version = feature->dfh_version;
ddev->cdev = pdata->dfl_cdev;
+ if (feature->param_size) {
+ ddev->params = kmemdup(feature->params, feature->param_size, GFP_KERNEL);
+ if (!ddev->params) {
+ ret = -ENOMEM;
+ goto put_dev;
+ }
+ ddev->param_size = feature->param_size;
+ }
/* add mmio resource */
parent_res = &pdev->resource[feature->resource_index];
* struct dfl_feature_info - sub feature info collected during feature dev build
*
* @fid: id of this sub feature.
+ * @revision: revision of this sub feature
+ * @dfh_version: version of Device Feature Header (DFH)
* @mmio_res: mmio resource of this sub feature.
* @ioaddr: mapped base address of mmio resource.
* @node: node in sub_features linked list.
* @irq_base: start of irq index in this sub feature.
* @nr_irqs: number of irqs of this sub feature.
+ * @param_size: size DFH parameters.
+ * @params: DFH parameter data.
*/
struct dfl_feature_info {
u16 fid;
u8 revision;
+ u8 dfh_version;
struct resource mmio_res;
void __iomem *ioaddr;
struct list_head node;
unsigned int irq_base;
unsigned int nr_irqs;
+ unsigned int param_size;
+ u64 params[];
};
static void dfl_fpga_cdev_add_port_dev(struct dfl_fpga_cdev *cdev,
feature->dev = fdev;
feature->id = finfo->fid;
feature->revision = finfo->revision;
+ feature->dfh_version = finfo->dfh_version;
+ if (finfo->param_size) {
+ feature->params = devm_kmemdup(binfo->dev,
+ finfo->params, finfo->param_size,
+ GFP_KERNEL);
+ if (!feature->params)
+ return -ENOMEM;
+
+ feature->param_size = finfo->param_size;
+ }
/*
* the FIU header feature has some fundamental functions (sriov
* set, port enable/disable) needed for the dfl bus device and
return 0;
}
+static u64 *find_param(u64 *params, resource_size_t max, int param_id)
+{
+ u64 *end = params + max / sizeof(u64);
+ u64 v, next;
+
+ while (params < end) {
+ v = *params;
+ if (param_id == FIELD_GET(DFHv1_PARAM_HDR_ID, v))
+ return params;
+
+ if (FIELD_GET(DFHv1_PARAM_HDR_NEXT_EOP, v))
+ break;
+
+ next = FIELD_GET(DFHv1_PARAM_HDR_NEXT_OFFSET, v);
+ params += next;
+ }
+
+ return NULL;
+}
+
+/**
+ * dfh_find_param() - find parameter block for the given parameter id
+ * @dfl_dev: dfl device
+ * @param_id: id of dfl parameter
+ * @psize: destination to store size of parameter data in bytes
+ *
+ * Return: pointer to start of parameter data, PTR_ERR otherwise.
+ */
+void *dfh_find_param(struct dfl_device *dfl_dev, int param_id, size_t *psize)
+{
+ u64 *phdr = find_param(dfl_dev->params, dfl_dev->param_size, param_id);
+
+ if (!phdr)
+ return ERR_PTR(-ENOENT);
+
+ if (psize)
+ *psize = (FIELD_GET(DFHv1_PARAM_HDR_NEXT_OFFSET, *phdr) - 1) * sizeof(u64);
+
+ return phdr + 1;
+}
+EXPORT_SYMBOL_GPL(dfh_find_param);
+
static int parse_feature_irqs(struct build_feature_devs_info *binfo,
- resource_size_t ofst, u16 fid,
- unsigned int *irq_base, unsigned int *nr_irqs)
+ resource_size_t ofst, struct dfl_feature_info *finfo)
{
void __iomem *base = binfo->ioaddr + ofst;
unsigned int i, ibase, inr = 0;
+ void *params = finfo->params;
enum dfl_id_type type;
+ u16 fid = finfo->fid;
int virq;
+ u64 *p;
u64 v;
- type = feature_dev_id_type(binfo->feature_dev);
+ switch (finfo->dfh_version) {
+ case 0:
+ /*
+ * DFHv0 only provides MMIO resource information for each feature
+ * in the DFL header. There is no generic interrupt information.
+ * Instead, features with interrupt functionality provide
+ * the information in feature specific registers.
+ */
+ type = feature_dev_id_type(binfo->feature_dev);
+ if (type == PORT_ID) {
+ switch (fid) {
+ case PORT_FEATURE_ID_UINT:
+ v = readq(base + PORT_UINT_CAP);
+ ibase = FIELD_GET(PORT_UINT_CAP_FST_VECT, v);
+ inr = FIELD_GET(PORT_UINT_CAP_INT_NUM, v);
+ break;
+ case PORT_FEATURE_ID_ERROR:
+ v = readq(base + PORT_ERROR_CAP);
+ ibase = FIELD_GET(PORT_ERROR_CAP_INT_VECT, v);
+ inr = FIELD_GET(PORT_ERROR_CAP_SUPP_INT, v);
+ break;
+ }
+ } else if (type == FME_ID) {
+ switch (fid) {
+ case FME_FEATURE_ID_GLOBAL_ERR:
+ v = readq(base + FME_ERROR_CAP);
+ ibase = FIELD_GET(FME_ERROR_CAP_INT_VECT, v);
+ inr = FIELD_GET(FME_ERROR_CAP_SUPP_INT, v);
+ break;
+ }
+ }
+ break;
- /*
- * Ideally DFL framework should only read info from DFL header, but
- * current version DFL only provides mmio resources information for
- * each feature in DFL Header, no field for interrupt resources.
- * Interrupt resource information is provided by specific mmio
- * registers of each private feature which supports interrupt. So in
- * order to parse and assign irq resources, DFL framework has to look
- * into specific capability registers of these private features.
- *
- * Once future DFL version supports generic interrupt resource
- * information in common DFL headers, the generic interrupt parsing
- * code will be added. But in order to be compatible to old version
- * DFL, the driver may still fall back to these quirks.
- */
- if (type == PORT_ID) {
- switch (fid) {
- case PORT_FEATURE_ID_UINT:
- v = readq(base + PORT_UINT_CAP);
- ibase = FIELD_GET(PORT_UINT_CAP_FST_VECT, v);
- inr = FIELD_GET(PORT_UINT_CAP_INT_NUM, v);
- break;
- case PORT_FEATURE_ID_ERROR:
- v = readq(base + PORT_ERROR_CAP);
- ibase = FIELD_GET(PORT_ERROR_CAP_INT_VECT, v);
- inr = FIELD_GET(PORT_ERROR_CAP_SUPP_INT, v);
+ case 1:
+ /*
+ * DFHv1 provides interrupt resource information in DFHv1
+ * parameter blocks.
+ */
+ p = find_param(params, finfo->param_size, DFHv1_PARAM_ID_MSI_X);
+ if (!p)
break;
- }
- } else if (type == FME_ID) {
- if (fid == FME_FEATURE_ID_GLOBAL_ERR) {
- v = readq(base + FME_ERROR_CAP);
- ibase = FIELD_GET(FME_ERROR_CAP_INT_VECT, v);
- inr = FIELD_GET(FME_ERROR_CAP_SUPP_INT, v);
- }
+
+ p++;
+ ibase = FIELD_GET(DFHv1_PARAM_MSI_X_STARTV, *p);
+ inr = FIELD_GET(DFHv1_PARAM_MSI_X_NUMV, *p);
+ break;
+
+ default:
+ dev_warn(binfo->dev, "unexpected DFH version %d\n", finfo->dfh_version);
+ break;
}
if (!inr) {
- *irq_base = 0;
- *nr_irqs = 0;
+ finfo->irq_base = 0;
+ finfo->nr_irqs = 0;
return 0;
}
}
}
- *irq_base = ibase;
- *nr_irqs = inr;
+ finfo->irq_base = ibase;
+ finfo->nr_irqs = inr;
return 0;
}
+static int dfh_get_param_size(void __iomem *dfh_base, resource_size_t max)
+{
+ int size = 0;
+ u64 v, next;
+
+ if (!FIELD_GET(DFHv1_CSR_SIZE_GRP_HAS_PARAMS,
+ readq(dfh_base + DFHv1_CSR_SIZE_GRP)))
+ return 0;
+
+ while (size + DFHv1_PARAM_HDR < max) {
+ v = readq(dfh_base + DFHv1_PARAM_HDR + size);
+
+ next = FIELD_GET(DFHv1_PARAM_HDR_NEXT_OFFSET, v);
+ if (!next)
+ return -EINVAL;
+
+ size += next * sizeof(u64);
+
+ if (FIELD_GET(DFHv1_PARAM_HDR_NEXT_EOP, v))
+ return size;
+ }
+
+ return -ENOENT;
+}
+
/*
* when create sub feature instances, for private features, it doesn't need
* to provide resource size and feature id as they could be read from DFH
create_feature_instance(struct build_feature_devs_info *binfo,
resource_size_t ofst, resource_size_t size, u16 fid)
{
- unsigned int irq_base, nr_irqs;
struct dfl_feature_info *finfo;
+ resource_size_t start, end;
+ int dfh_psize = 0;
u8 revision = 0;
+ u64 v, addr_off;
+ u8 dfh_ver = 0;
int ret;
- u64 v;
if (fid != FEATURE_ID_AFU) {
v = readq(binfo->ioaddr + ofst);
revision = FIELD_GET(DFH_REVISION, v);
-
+ dfh_ver = FIELD_GET(DFH_VERSION, v);
/* read feature size and id if inputs are invalid */
size = size ? size : feature_size(v);
fid = fid ? fid : feature_id(v);
+ if (dfh_ver == 1) {
+ dfh_psize = dfh_get_param_size(binfo->ioaddr + ofst, size);
+ if (dfh_psize < 0) {
+ dev_err(binfo->dev,
+ "failed to read size of DFHv1 parameters %d\n",
+ dfh_psize);
+ return dfh_psize;
+ }
+ dev_dbg(binfo->dev, "dfhv1_psize %d\n", dfh_psize);
+ }
}
if (binfo->len - ofst < size)
return -EINVAL;
- ret = parse_feature_irqs(binfo, ofst, fid, &irq_base, &nr_irqs);
- if (ret)
- return ret;
-
- finfo = kzalloc(sizeof(*finfo), GFP_KERNEL);
+ finfo = kzalloc(struct_size(finfo, params, dfh_psize / sizeof(u64)), GFP_KERNEL);
if (!finfo)
return -ENOMEM;
+ memcpy_fromio(finfo->params, binfo->ioaddr + ofst + DFHv1_PARAM_HDR, dfh_psize);
+ finfo->param_size = dfh_psize;
+
finfo->fid = fid;
finfo->revision = revision;
- finfo->mmio_res.start = binfo->start + ofst;
- finfo->mmio_res.end = finfo->mmio_res.start + size - 1;
+ finfo->dfh_version = dfh_ver;
+ if (dfh_ver == 1) {
+ v = readq(binfo->ioaddr + ofst + DFHv1_CSR_ADDR);
+ addr_off = FIELD_GET(DFHv1_CSR_ADDR_MASK, v);
+ if (FIELD_GET(DFHv1_CSR_ADDR_REL, v))
+ start = addr_off << 1;
+ else
+ start = binfo->start + ofst + addr_off;
+
+ v = readq(binfo->ioaddr + ofst + DFHv1_CSR_SIZE_GRP);
+ end = start + FIELD_GET(DFHv1_CSR_SIZE_GRP_SIZE, v) - 1;
+ } else {
+ start = binfo->start + ofst;
+ end = start + size - 1;
+ }
finfo->mmio_res.flags = IORESOURCE_MEM;
- finfo->irq_base = irq_base;
- finfo->nr_irqs = nr_irqs;
+ finfo->mmio_res.start = start;
+ finfo->mmio_res.end = end;
+
+ ret = parse_feature_irqs(binfo, ofst, finfo);
+ if (ret) {
+ kfree(finfo);
+ return ret;
+ }
list_add_tail(&finfo->node, &binfo->sub_features);
binfo->feature_num++;
// SPDX-License-Identifier: GPL-2.0
+#include <linux/acpi.h>
#include <linux/bitmap.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/spinlock.h>
-#include <linux/list.h>
+#include <linux/compat.h>
+#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/err.h>
-#include <linux/debugfs.h>
-#include <linux/seq_file.h>
+#include <linux/file.h>
+#include <linux/fs.h>
#include <linux/gpio.h>
-#include <linux/idr.h>
-#include <linux/slab.h>
-#include <linux/acpi.h>
#include <linux/gpio/driver.h>
#include <linux/gpio/machine.h>
+#include <linux/idr.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/module.h>
#include <linux/pinctrl/consumer.h>
-#include <linux/fs.h>
-#include <linux/compat.h>
-#include <linux/file.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+
#include <uapi/linux/gpio.h>
-#include "gpiolib.h"
-#include "gpiolib-of.h"
#include "gpiolib-acpi.h"
-#include "gpiolib-swnode.h"
#include "gpiolib-cdev.h"
+#include "gpiolib-of.h"
+#include "gpiolib-swnode.h"
#include "gpiolib-sysfs.h"
+#include "gpiolib.h"
#define CREATE_TRACE_POINTS
#include <trace/events/gpio.h>
static int gpiochip_add_pin_ranges(struct gpio_chip *gc)
{
+ /*
+ * Device Tree platforms are supposed to use "gpio-ranges"
+ * property. This check ensures that the ->add_pin_ranges()
+ * won't be called for them.
+ */
+ if (device_property_present(&gc->gpiodev->dev, "gpio-ranges"))
+ return 0;
+
if (gc->add_pin_ranges)
return gc->add_pin_ranges(gc);
{
int ret;
+ /*
+ * If fwnode doesn't belong to another device, it's safe to clear its
+ * initialized flag.
+ */
+ if (gdev->dev.fwnode && !gdev->dev.fwnode->dev)
+ fwnode_dev_initialized(gdev->dev.fwnode, false);
+
ret = gcdev_register(gdev, gpio_devt);
if (ret)
return ret;
int base = 0;
int ret = 0;
+ /* If the calling driver did not initialize firmware node, do it here */
if (gc->fwnode)
fwnode = gc->fwnode;
else if (gc->parent)
fwnode = dev_fwnode(gc->parent);
+ gc->fwnode = fwnode;
/*
* First: allocate and populate the internal stat container, and
gdev->chip = gc;
gc->gpiodev = gdev;
- of_gpio_dev_init(gc, gdev);
- acpi_gpio_dev_init(gc, gdev);
-
- /*
- * Assign fwnode depending on the result of the previous calls,
- * if none of them succeed, assign it to the parent's one.
- */
- gc->fwnode = gdev->dev.fwnode = dev_fwnode(&gdev->dev) ?: fwnode;
+ device_set_node(&gdev->dev, gc->fwnode);
gdev->id = ida_alloc(&gpio_ida, GFP_KERNEL);
if (gdev->id < 0) {
gpiochip_free_valid_mask(gc);
if (gdev->dev.release) {
/* release() has been registered by gpiochip_setup_dev() */
- put_device(&gdev->dev);
+ gpio_device_put(gdev);
goto err_print_message;
}
err_remove_from_list:
*/
gcdev_unregister(gdev);
up_write(&gdev->sem);
- put_device(&gdev->dev);
+ gpio_device_put(gdev);
}
EXPORT_SYMBOL_GPL(gpiochip_remove);
/* Just pick something */
fwspec.param[1] = IRQ_TYPE_EDGE_RISING;
fwspec.param_count = 2;
- ret = __irq_domain_alloc_irqs(gc->irq.domain,
- /* just pick something */
- -1,
- 1,
- NUMA_NO_NODE,
- &fwspec,
- false,
- NULL);
+ ret = irq_domain_alloc_irqs(gc->irq.domain, 1,
+ NUMA_NO_NODE, &fwspec);
if (ret < 0) {
chip_err(gc,
"can not allocate irq for GPIO line %d parent hwirq %d in hierarchy domain: %d\n",
int gpiod_request(struct gpio_desc *desc, const char *label)
{
int ret = -EPROBE_DEFER;
- struct gpio_device *gdev;
VALIDATE_DESC(desc);
- gdev = desc->gdev;
- if (try_module_get(gdev->owner)) {
+ if (try_module_get(desc->gdev->owner)) {
ret = gpiod_request_commit(desc, label);
if (ret)
- module_put(gdev->owner);
+ module_put(desc->gdev->owner);
else
- get_device(&gdev->dev);
+ gpio_device_get(desc->gdev);
}
if (ret)
{
if (desc && desc->gdev && gpiod_free_commit(desc)) {
module_put(desc->gdev->owner);
- put_device(&desc->gdev->dev);
+ gpio_device_put(desc->gdev);
} else {
WARN_ON(extra_checks);
}
return 0;
}
- static int mipi_dsi_uevent(struct device *dev, struct kobj_uevent_env *env)
+ static int mipi_dsi_uevent(const struct device *dev, struct kobj_uevent_env *env)
{
- struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);
+ const struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);
int err;
err = of_device_uevent_modalias(dev, env);
}
EXPORT_SYMBOL(mipi_dsi_dcs_get_display_brightness);
+/**
+ * mipi_dsi_dcs_set_display_brightness_large() - sets the 16-bit brightness value
+ * of the display
+ * @dsi: DSI peripheral device
+ * @brightness: brightness value
+ *
+ * Return: 0 on success or a negative error code on failure.
+ */
+int mipi_dsi_dcs_set_display_brightness_large(struct mipi_dsi_device *dsi,
+ u16 brightness)
+{
+ u8 payload[2] = { brightness >> 8, brightness & 0xff };
+ ssize_t err;
+
+ err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_DISPLAY_BRIGHTNESS,
+ payload, sizeof(payload));
+ if (err < 0)
+ return err;
+
+ return 0;
+}
+EXPORT_SYMBOL(mipi_dsi_dcs_set_display_brightness_large);
+
+/**
+ * mipi_dsi_dcs_get_display_brightness_large() - gets the current 16-bit
+ * brightness value of the display
+ * @dsi: DSI peripheral device
+ * @brightness: brightness value
+ *
+ * Return: 0 on success or a negative error code on failure.
+ */
+int mipi_dsi_dcs_get_display_brightness_large(struct mipi_dsi_device *dsi,
+ u16 *brightness)
+{
+ u8 brightness_be[2];
+ ssize_t err;
+
+ err = mipi_dsi_dcs_read(dsi, MIPI_DCS_GET_DISPLAY_BRIGHTNESS,
+ brightness_be, sizeof(brightness_be));
+ if (err <= 0) {
+ if (err == 0)
+ err = -ENODATA;
+
+ return err;
+ }
+
+ *brightness = (brightness_be[0] << 8) | brightness_be[1];
+
+ return 0;
+}
+EXPORT_SYMBOL(mipi_dsi_dcs_get_display_brightness_large);
+
static int mipi_dsi_drv_probe(struct device *dev)
{
struct mipi_dsi_driver *drv = to_mipi_dsi_driver(dev->driver);
#define DRIVER_DESC "HID core driver"
-int hid_debug = 0;
-module_param_named(debug, hid_debug, int, 0600);
-MODULE_PARM_DESC(debug, "toggle HID debugging messages");
-EXPORT_SYMBOL_GPL(hid_debug);
-
static int hid_ignore_special_drivers = 0;
module_param_named(ignore_special_drivers, hid_ignore_special_drivers, int, 0600);
MODULE_PARM_DESC(ignore_special_drivers, "Ignore any special drivers and handle all devices by generic driver");
int i;
if (((parser->global.usage_page << 16) == HID_UP_SENSOR) &&
- type == HID_COLLECTION_PHYSICAL)
+ (type == HID_COLLECTION_PHYSICAL ||
+ type == HID_COLLECTION_APPLICATION))
hid->group = HID_GROUP_SENSOR_HUB;
if (hid->vendor == USB_VENDOR_ID_MICROSOFT &&
__u8 *end;
__u8 *next;
int ret;
+ int i;
static int (*dispatch_type[])(struct hid_parser *parser,
struct hid_item *item) = {
hid_parser_main,
return -ENODEV;
size = device->dev_rsize;
- buf = kmemdup(start, size, GFP_KERNEL);
+ /* call_hid_bpf_rdesc_fixup() ensures we work on a copy of rdesc */
+ buf = call_hid_bpf_rdesc_fixup(device, start, &size);
if (buf == NULL)
return -ENOMEM;
goto err;
}
device->collection_size = HID_DEFAULT_NUM_COLLECTIONS;
+ for (i = 0; i < HID_DEFAULT_NUM_COLLECTIONS; i++)
+ device->collection[i].parent_idx = -1;
ret = -EINVAL;
while ((next = fetch_item(start, end, &item)) != NULL) {
report_enum = hid->report_enum + type;
hdrv = hid->driver;
+ data = dispatch_hid_bpf_device_event(hid, type, data, &size, interrupt);
+ if (IS_ERR(data)) {
+ ret = PTR_ERR(data);
+ goto unlock;
+ }
+
if (!size) {
dbg_hid("empty report\n");
ret = -1;
int len;
int ret;
+ ret = hid_bpf_connect_device(hdev);
+ if (ret)
+ return ret;
+
if (hdev->quirks & HID_QUIRK_HIDDEV_FORCE)
connect_mask |= (HID_CONNECT_HIDDEV_FORCE | HID_CONNECT_HIDDEV);
if (hdev->quirks & HID_QUIRK_HIDINPUT_FORCE)
if (hdev->claimed & HID_CLAIMED_HIDRAW)
hidraw_disconnect(hdev);
hdev->claimed = 0;
+
+ hid_bpf_disconnect_device(hdev);
}
EXPORT_SYMBOL_GPL(hid_disconnect);
};
__ATTRIBUTE_GROUPS(hid_dev);
- static int hid_uevent(struct device *dev, struct kobj_uevent_env *env)
+ static int hid_uevent(const struct device *dev, struct kobj_uevent_env *env)
{
- struct hid_device *hdev = to_hid_device(dev);
+ const struct hid_device *hdev = to_hid_device(dev);
if (add_uevent_var(env, "HID_ID=%04X:%08X:%08X",
hdev->bus, hdev->vendor, hdev->product))
sema_init(&hdev->driver_input_lock, 1);
mutex_init(&hdev->ll_open_lock);
+ hid_bpf_device_init(hdev);
+
return hdev;
}
EXPORT_SYMBOL_GPL(hid_allocate_device);
*/
void hid_destroy_device(struct hid_device *hdev)
{
+ hid_bpf_destroy_device(hdev);
hid_remove_device(hdev);
put_device(&hdev->dev);
}
}
EXPORT_SYMBOL_GPL(hid_check_keys_pressed);
+#ifdef CONFIG_HID_BPF
+static struct hid_bpf_ops hid_ops = {
+ .hid_get_report = hid_get_report,
+ .hid_hw_raw_request = hid_hw_raw_request,
+ .owner = THIS_MODULE,
+ .bus_type = &hid_bus_type,
+};
+#endif
+
static int __init hid_init(void)
{
int ret;
- if (hid_debug)
- pr_warn("hid_debug is now used solely for parser and driver debugging.\n"
- "debugfs is now used for inspecting the device (report descriptor, reports)\n");
-
ret = bus_register(&hid_bus_type);
if (ret) {
pr_err("can't register hid bus\n");
goto err;
}
+#ifdef CONFIG_HID_BPF
+ hid_bpf_ops = &hid_ops;
+#endif
+
ret = hidraw_init();
if (ret)
goto err_bus;
static void __exit hid_exit(void)
{
+#ifdef CONFIG_HID_BPF
+ hid_bpf_ops = NULL;
+#endif
hid_debug_exit();
hidraw_exit();
bus_unregister(&hid_bus_type);
* representation of the device guid (each byte of the guid will be
* represented with two hex characters.
*/
- static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env)
+ static int vmbus_uevent(const struct device *device, struct kobj_uevent_env *env)
{
- struct hv_device *dev = device_to_hv_device(device);
+ const struct hv_device *dev = device_to_hv_device(device);
const char *format = "MODALIAS=vmbus:%*phN";
return add_uevent_var(env, format, UUID_SIZE, &dev->dev_type);
if (!hv_is_hyperv_initialized())
return -ENODEV;
- if (hv_root_partition)
+ if (hv_root_partition && !hv_nested)
return 0;
/*
return 0;
}
- static int i2c_device_uevent(struct device *dev, struct kobj_uevent_env *env)
+ static int i2c_device_uevent(const struct device *dev, struct kobj_uevent_env *env)
{
- struct i2c_client *client = to_i2c_client(dev);
+ const struct i2c_client *client = to_i2c_client(dev);
int rc;
rc = of_device_uevent_modalias(dev, env);
}
EXPORT_SYMBOL_GPL(i2c_unregister_device);
+/**
+ * i2c_find_device_by_fwnode() - find an i2c_client for the fwnode
+ * @fwnode: &struct fwnode_handle corresponding to the &struct i2c_client
+ *
+ * Look up and return the &struct i2c_client corresponding to the @fwnode.
+ * If no client can be found, or @fwnode is NULL, this returns NULL.
+ *
+ * The user must call put_device(&client->dev) once done with the i2c client.
+ */
+struct i2c_client *i2c_find_device_by_fwnode(struct fwnode_handle *fwnode)
+{
+ struct i2c_client *client;
+ struct device *dev;
+
+ if (!fwnode)
+ return NULL;
+
+ dev = bus_find_device_by_fwnode(&i2c_bus_type, fwnode);
+ if (!dev)
+ return NULL;
+
+ client = i2c_verify_client(dev);
+ if (!client)
+ put_device(dev);
+
+ return client;
+}
+EXPORT_SYMBOL(i2c_find_device_by_fwnode);
+
static const struct i2c_device_id dummy_id[] = {
{ "dummy", 0 },
}
EXPORT_SYMBOL_GPL(devm_i2c_add_adapter);
+static int i2c_dev_or_parent_fwnode_match(struct device *dev, const void *data)
+{
+ if (dev_fwnode(dev) == data)
+ return 1;
+
+ if (dev->parent && dev_fwnode(dev->parent) == data)
+ return 1;
+
+ return 0;
+}
+
+/**
+ * i2c_find_adapter_by_fwnode() - find an i2c_adapter for the fwnode
+ * @fwnode: &struct fwnode_handle corresponding to the &struct i2c_adapter
+ *
+ * Look up and return the &struct i2c_adapter corresponding to the @fwnode.
+ * If no adapter can be found, or @fwnode is NULL, this returns NULL.
+ *
+ * The user must call put_device(&adapter->dev) once done with the i2c adapter.
+ */
+struct i2c_adapter *i2c_find_adapter_by_fwnode(struct fwnode_handle *fwnode)
+{
+ struct i2c_adapter *adapter;
+ struct device *dev;
+
+ if (!fwnode)
+ return NULL;
+
+ dev = bus_find_device(&i2c_bus_type, NULL, fwnode,
+ i2c_dev_or_parent_fwnode_match);
+ if (!dev)
+ return NULL;
+
+ adapter = i2c_verify_adapter(dev);
+ if (!adapter)
+ put_device(dev);
+
+ return adapter;
+}
+EXPORT_SYMBOL(i2c_find_adapter_by_fwnode);
+
+/**
+ * i2c_get_adapter_by_fwnode() - find an i2c_adapter for the fwnode
+ * @fwnode: &struct fwnode_handle corresponding to the &struct i2c_adapter
+ *
+ * Look up and return the &struct i2c_adapter corresponding to the @fwnode,
+ * and increment the adapter module's use count. If no adapter can be found,
+ * or @fwnode is NULL, this returns NULL.
+ *
+ * The user must call i2c_put_adapter(adapter) once done with the i2c adapter.
+ * Note that this is different from i2c_find_adapter_by_node().
+ */
+struct i2c_adapter *i2c_get_adapter_by_fwnode(struct fwnode_handle *fwnode)
+{
+ struct i2c_adapter *adapter;
+
+ adapter = i2c_find_adapter_by_fwnode(fwnode);
+ if (!adapter)
+ return NULL;
+
+ if (!try_module_get(adapter->owner)) {
+ put_device(&adapter->dev);
+ adapter = NULL;
+ }
+
+ return adapter;
+}
+EXPORT_SYMBOL(i2c_get_adapter_by_fwnode);
+
static void i2c_parse_timing(struct device *dev, char *prop_name, u32 *cur_val_p,
u32 def_val, bool use_def)
{
// SPDX-License-Identifier: GPL-2.0
/*
- * Copyright (c) 2012-2019, Intel Corporation. All rights reserved.
+ * Copyright (c) 2012-2023, Intel Corporation. All rights reserved.
* Intel Management Engine Interface (Intel MEI) Linux driver
*/
*
* Return: 0 on success -ENOMEM on when add_uevent_var fails
*/
- static int mei_cl_device_uevent(struct device *dev, struct kobj_uevent_env *env)
+ static int mei_cl_device_uevent(const struct device *dev, struct kobj_uevent_env *env)
{
- struct mei_cl_device *cldev = to_mei_cl_device(dev);
+ const struct mei_cl_device *cldev = to_mei_cl_device(dev);
const uuid_le *uuid = mei_me_cl_uuid(cldev->me_cl);
u8 version = mei_me_cl_ver(cldev->me_cl);
*/
static void mei_cl_bus_dev_stop(struct mei_cl_device *cldev)
{
+ cldev->do_match = 0;
if (cldev->is_added)
device_release_driver(&cldev->dev);
}
}
static int
- sdio_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
+ sdio_bus_uevent(const struct device *dev, struct kobj_uevent_env *env)
{
- struct sdio_func *func = dev_to_sdio_func(dev);
+ const struct sdio_func *func = dev_to_sdio_func(dev);
unsigned int i;
if (add_uevent_var(env,
if (!(func->card->quirks & MMC_QUIRK_NONSTD_SDIO))
sdio_free_func_cis(func);
+ /*
+ * We have now removed the link to the tuples in the
+ * card structure, so remove the reference.
+ */
+ put_device(&func->card->dev);
+
kfree(func->info);
kfree(func->tmpbuf);
kfree(func);
device_initialize(&func->dev);
+ /*
+ * We may link to tuples in the card structure,
+ * we need make sure we have a reference to it.
+ */
+ get_device(&func->card->dev);
+
func->dev.parent = &card->dev;
func->dev.bus = &sdio_bus_type;
func->dev.release = sdio_release_func;
*/
void sdio_remove_func(struct sdio_func *func)
{
- if (!sdio_func_present(func))
- return;
+ if (sdio_func_present(func))
+ device_del(&func->dev);
- device_del(&func->dev);
of_node_put(func->dev.of_node);
put_device(&func->dev);
}
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/kernel.h>
+#include <linux/micrel_phy.h>
#include <linux/mii.h>
#include <linux/mm.h>
#include <linux/module.h>
struct phy_device *mdiobus_get_phy(struct mii_bus *bus, int addr)
{
+ bool addr_valid = addr >= 0 && addr < ARRAY_SIZE(bus->mdio_map);
struct mdio_device *mdiodev;
- if (addr < 0 || addr >= ARRAY_SIZE(bus->mdio_map))
+ if (WARN_ONCE(!addr_valid, "addr %d out of range\n", addr))
return NULL;
mdiodev = bus->mdio_map[addr];
return ret;
}
+static struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr, bool c45)
+{
+ struct phy_device *phydev = ERR_PTR(-ENODEV);
+ int err;
+
+ phydev = get_phy_device(bus, addr, c45);
+ if (IS_ERR(phydev))
+ return phydev;
+
+ /* For DT, see if the auto-probed phy has a corresponding child
+ * in the bus node, and set the of_node pointer in this case.
+ */
+ of_mdiobus_link_mdiodev(bus, &phydev->mdio);
+
+ err = phy_device_register(phydev);
+ if (err) {
+ phy_device_free(phydev);
+ return ERR_PTR(-ENODEV);
+ }
+
+ return phydev;
+}
+
+/**
+ * mdiobus_scan_c22 - scan one address on a bus for C22 MDIO devices.
+ * @bus: mii_bus to scan
+ * @addr: address on bus to scan
+ *
+ * This function scans one address on the MDIO bus, looking for
+ * devices which can be identified using a vendor/product ID in
+ * registers 2 and 3. Not all MDIO devices have such registers, but
+ * PHY devices typically do. Hence this function assumes anything
+ * found is a PHY, or can be treated as a PHY. Other MDIO devices,
+ * such as switches, will probably not be found during the scan.
+ */
+struct phy_device *mdiobus_scan_c22(struct mii_bus *bus, int addr)
+{
+ return mdiobus_scan(bus, addr, false);
+}
+EXPORT_SYMBOL(mdiobus_scan_c22);
+
+/**
+ * mdiobus_scan_c45 - scan one address on a bus for C45 MDIO devices.
+ * @bus: mii_bus to scan
+ * @addr: address on bus to scan
+ *
+ * This function scans one address on the MDIO bus, looking for
+ * devices which can be identified using a vendor/product ID in
+ * registers 2 and 3. Not all MDIO devices have such registers, but
+ * PHY devices typically do. Hence this function assumes anything
+ * found is a PHY, or can be treated as a PHY. Other MDIO devices,
+ * such as switches, will probably not be found during the scan.
+ */
+static struct phy_device *mdiobus_scan_c45(struct mii_bus *bus, int addr)
+{
+ return mdiobus_scan(bus, addr, true);
+}
+
+static int mdiobus_scan_bus_c22(struct mii_bus *bus)
+{
+ int i;
+
+ for (i = 0; i < PHY_MAX_ADDR; i++) {
+ if ((bus->phy_mask & BIT(i)) == 0) {
+ struct phy_device *phydev;
+
+ phydev = mdiobus_scan_c22(bus, i);
+ if (IS_ERR(phydev) && (PTR_ERR(phydev) != -ENODEV))
+ return PTR_ERR(phydev);
+ }
+ }
+ return 0;
+}
+
+static int mdiobus_scan_bus_c45(struct mii_bus *bus)
+{
+ int i;
+
+ for (i = 0; i < PHY_MAX_ADDR; i++) {
+ if ((bus->phy_mask & BIT(i)) == 0) {
+ struct phy_device *phydev;
+
+ /* Don't scan C45 if we already have a C22 device */
+ if (bus->mdio_map[i])
+ continue;
+
+ phydev = mdiobus_scan_c45(bus, i);
+ if (IS_ERR(phydev) && (PTR_ERR(phydev) != -ENODEV))
+ return PTR_ERR(phydev);
+ }
+ }
+ return 0;
+}
+
+/* There are some C22 PHYs which do bad things when where is a C45
+ * transaction on the bus, like accepting a read themselves, and
+ * stomping over the true devices reply, to performing a write to
+ * themselves which was intended for another device. Now that C22
+ * devices have been found, see if any of them are bad for C45, and if we
+ * should skip the C45 scan.
+ */
+static bool mdiobus_prevent_c45_scan(struct mii_bus *bus)
+{
+ int i;
+
+ for (i = 0; i < PHY_MAX_ADDR; i++) {
+ struct phy_device *phydev;
+ u32 oui;
+
+ phydev = mdiobus_get_phy(bus, i);
+ if (!phydev)
+ continue;
+ oui = phydev->phy_id >> 10;
+
+ if (oui == MICREL_OUI)
+ return true;
+ }
+ return false;
+}
+
/**
* __mdiobus_register - bring up all the PHYs on a given bus and attach them to bus
* @bus: target mii_bus
int __mdiobus_register(struct mii_bus *bus, struct module *owner)
{
struct mdio_device *mdiodev;
- int i, err;
struct gpio_desc *gpiod;
+ bool prevent_c45_scan;
+ int i, err;
+
+ if (!bus || !bus->name)
+ return -EINVAL;
- if (NULL == bus || NULL == bus->name ||
- NULL == bus->read || NULL == bus->write)
+ /* An access method always needs both read and write operations */
+ if (!!bus->read != !!bus->write || !!bus->read_c45 != !!bus->write_c45)
+ return -EINVAL;
+
+ /* At least one method is mandatory */
+ if (!bus->read && !bus->read_c45)
return -EINVAL;
if (bus->parent && bus->parent->of_node)
goto error_reset_gpiod;
}
- for (i = 0; i < PHY_MAX_ADDR; i++) {
- if ((bus->phy_mask & BIT(i)) == 0) {
- struct phy_device *phydev;
+ if (bus->read) {
+ err = mdiobus_scan_bus_c22(bus);
+ if (err)
+ goto error;
+ }
- phydev = mdiobus_scan(bus, i);
- if (IS_ERR(phydev) && (PTR_ERR(phydev) != -ENODEV)) {
- err = PTR_ERR(phydev);
- goto error;
- }
- }
+ prevent_c45_scan = mdiobus_prevent_c45_scan(bus);
+
+ if (!prevent_c45_scan && bus->read_c45) {
+ err = mdiobus_scan_bus_c45(bus);
+ if (err)
+ goto error;
}
mdiobus_setup_mdiodev_from_board_info(bus, mdiobus_create_device);
return 0;
error:
- while (--i >= 0) {
+ for (i = 0; i < PHY_MAX_ADDR; i++) {
mdiodev = bus->mdio_map[i];
if (!mdiodev)
continue;
}
EXPORT_SYMBOL(mdiobus_free);
-/**
- * mdiobus_scan - scan a bus for MDIO devices.
- * @bus: mii_bus to scan
- * @addr: address on bus to scan
- *
- * This function scans the MDIO bus, looking for devices which can be
- * identified using a vendor/product ID in registers 2 and 3. Not all
- * MDIO devices have such registers, but PHY devices typically
- * do. Hence this function assumes anything found is a PHY, or can be
- * treated as a PHY. Other MDIO devices, such as switches, will
- * probably not be found during the scan.
- */
-struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr)
-{
- struct phy_device *phydev = ERR_PTR(-ENODEV);
- int err;
-
- switch (bus->probe_capabilities) {
- case MDIOBUS_NO_CAP:
- case MDIOBUS_C22:
- phydev = get_phy_device(bus, addr, false);
- break;
- case MDIOBUS_C45:
- phydev = get_phy_device(bus, addr, true);
- break;
- case MDIOBUS_C22_C45:
- phydev = get_phy_device(bus, addr, false);
- if (IS_ERR(phydev))
- phydev = get_phy_device(bus, addr, true);
- break;
- }
-
- if (IS_ERR(phydev))
- return phydev;
-
- /*
- * For DT, see if the auto-probed phy has a correspoding child
- * in the bus node, and set the of_node pointer in this case.
- */
- of_mdiobus_link_mdiodev(bus, &phydev->mdio);
-
- err = phy_device_register(phydev);
- if (err) {
- phy_device_free(phydev);
- return ERR_PTR(-ENODEV);
- }
-
- return phydev;
-}
-EXPORT_SYMBOL(mdiobus_scan);
-
static void mdiobus_stats_acct(struct mdio_bus_stats *stats, bool op, int ret)
{
preempt_disable();
lockdep_assert_held_once(&bus->mdio_lock);
- retval = bus->read(bus, addr, regnum);
+ if (bus->read)
+ retval = bus->read(bus, addr, regnum);
+ else
+ retval = -EOPNOTSUPP;
trace_mdio_access(bus, 1, addr, regnum, retval, retval);
mdiobus_stats_acct(&bus->stats[addr], true, retval);
lockdep_assert_held_once(&bus->mdio_lock);
- err = bus->write(bus, addr, regnum, val);
+ if (bus->write)
+ err = bus->write(bus, addr, regnum, val);
+ else
+ err = -EOPNOTSUPP;
trace_mdio_access(bus, 0, addr, regnum, val, err);
mdiobus_stats_acct(&bus->stats[addr], false, err);
}
EXPORT_SYMBOL_GPL(__mdiobus_modify_changed);
+/**
+ * __mdiobus_c45_read - Unlocked version of the mdiobus_c45_read function
+ * @bus: the mii_bus struct
+ * @addr: the phy address
+ * @devad: device address to read
+ * @regnum: register number to read
+ *
+ * Read a MDIO bus register. Caller must hold the mdio bus lock.
+ *
+ * NOTE: MUST NOT be called from interrupt context.
+ */
+int __mdiobus_c45_read(struct mii_bus *bus, int addr, int devad, u32 regnum)
+{
+ int retval;
+
+ lockdep_assert_held_once(&bus->mdio_lock);
+
+ if (bus->read_c45)
+ retval = bus->read_c45(bus, addr, devad, regnum);
+ else
+ retval = -EOPNOTSUPP;
+
+ trace_mdio_access(bus, 1, addr, regnum, retval, retval);
+ mdiobus_stats_acct(&bus->stats[addr], true, retval);
+
+ return retval;
+}
+EXPORT_SYMBOL(__mdiobus_c45_read);
+
+/**
+ * __mdiobus_c45_write - Unlocked version of the mdiobus_write function
+ * @bus: the mii_bus struct
+ * @addr: the phy address
+ * @devad: device address to read
+ * @regnum: register number to write
+ * @val: value to write to @regnum
+ *
+ * Write a MDIO bus register. Caller must hold the mdio bus lock.
+ *
+ * NOTE: MUST NOT be called from interrupt context.
+ */
+int __mdiobus_c45_write(struct mii_bus *bus, int addr, int devad, u32 regnum,
+ u16 val)
+{
+ int err;
+
+ lockdep_assert_held_once(&bus->mdio_lock);
+
+ if (bus->write_c45)
+ err = bus->write_c45(bus, addr, devad, regnum, val);
+ else
+ err = -EOPNOTSUPP;
+
+ trace_mdio_access(bus, 0, addr, regnum, val, err);
+ mdiobus_stats_acct(&bus->stats[addr], false, err);
+
+ return err;
+}
+EXPORT_SYMBOL(__mdiobus_c45_write);
+
+/**
+ * __mdiobus_c45_modify_changed - Unlocked version of the mdiobus_modify function
+ * @bus: the mii_bus struct
+ * @addr: the phy address
+ * @devad: device address to read
+ * @regnum: register number to modify
+ * @mask: bit mask of bits to clear
+ * @set: bit mask of bits to set
+ *
+ * Read, modify, and if any change, write the register value back to the
+ * device. Any error returns a negative number.
+ *
+ * NOTE: MUST NOT be called from interrupt context.
+ */
+static int __mdiobus_c45_modify_changed(struct mii_bus *bus, int addr,
+ int devad, u32 regnum, u16 mask,
+ u16 set)
+{
+ int new, ret;
+
+ ret = __mdiobus_c45_read(bus, addr, devad, regnum);
+ if (ret < 0)
+ return ret;
+
+ new = (ret & ~mask) | set;
+ if (new == ret)
+ return 0;
+
+ ret = __mdiobus_c45_write(bus, addr, devad, regnum, new);
+
+ return ret < 0 ? ret : 1;
+}
+
/**
* mdiobus_read_nested - Nested version of the mdiobus_read function
* @bus: the mii_bus struct
}
EXPORT_SYMBOL(mdiobus_read);
+/**
+ * mdiobus_c45_read - Convenience function for reading a given MII mgmt register
+ * @bus: the mii_bus struct
+ * @addr: the phy address
+ * @devad: device address to read
+ * @regnum: register number to read
+ *
+ * NOTE: MUST NOT be called from interrupt context,
+ * because the bus read/write functions may wait for an interrupt
+ * to conclude the operation.
+ */
+int mdiobus_c45_read(struct mii_bus *bus, int addr, int devad, u32 regnum)
+{
+ int retval;
+
+ mutex_lock(&bus->mdio_lock);
+ retval = __mdiobus_c45_read(bus, addr, devad, regnum);
+ mutex_unlock(&bus->mdio_lock);
+
+ return retval;
+}
+EXPORT_SYMBOL(mdiobus_c45_read);
+
+/**
+ * mdiobus_c45_read_nested - Nested version of the mdiobus_c45_read function
+ * @bus: the mii_bus struct
+ * @addr: the phy address
+ * @devad: device address to read
+ * @regnum: register number to read
+ *
+ * In case of nested MDIO bus access avoid lockdep false positives by
+ * using mutex_lock_nested().
+ *
+ * NOTE: MUST NOT be called from interrupt context,
+ * because the bus read/write functions may wait for an interrupt
+ * to conclude the operation.
+ */
+int mdiobus_c45_read_nested(struct mii_bus *bus, int addr, int devad,
+ u32 regnum)
+{
+ int retval;
+
+ mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
+ retval = __mdiobus_c45_read(bus, addr, devad, regnum);
+ mutex_unlock(&bus->mdio_lock);
+
+ return retval;
+}
+EXPORT_SYMBOL(mdiobus_c45_read_nested);
+
/**
* mdiobus_write_nested - Nested version of the mdiobus_write function
* @bus: the mii_bus struct
}
EXPORT_SYMBOL(mdiobus_write);
+/**
+ * mdiobus_c45_write - Convenience function for writing a given MII mgmt register
+ * @bus: the mii_bus struct
+ * @addr: the phy address
+ * @devad: device address to read
+ * @regnum: register number to write
+ * @val: value to write to @regnum
+ *
+ * NOTE: MUST NOT be called from interrupt context,
+ * because the bus read/write functions may wait for an interrupt
+ * to conclude the operation.
+ */
+int mdiobus_c45_write(struct mii_bus *bus, int addr, int devad, u32 regnum,
+ u16 val)
+{
+ int err;
+
+ mutex_lock(&bus->mdio_lock);
+ err = __mdiobus_c45_write(bus, addr, devad, regnum, val);
+ mutex_unlock(&bus->mdio_lock);
+
+ return err;
+}
+EXPORT_SYMBOL(mdiobus_c45_write);
+
+/**
+ * mdiobus_c45_write_nested - Nested version of the mdiobus_c45_write function
+ * @bus: the mii_bus struct
+ * @addr: the phy address
+ * @devad: device address to read
+ * @regnum: register number to write
+ * @val: value to write to @regnum
+ *
+ * In case of nested MDIO bus access avoid lockdep false positives by
+ * using mutex_lock_nested().
+ *
+ * NOTE: MUST NOT be called from interrupt context,
+ * because the bus read/write functions may wait for an interrupt
+ * to conclude the operation.
+ */
+int mdiobus_c45_write_nested(struct mii_bus *bus, int addr, int devad,
+ u32 regnum, u16 val)
+{
+ int err;
+
+ mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
+ err = __mdiobus_c45_write(bus, addr, devad, regnum, val);
+ mutex_unlock(&bus->mdio_lock);
+
+ return err;
+}
+EXPORT_SYMBOL(mdiobus_c45_write_nested);
+
/**
* mdiobus_modify - Convenience function for modifying a given mdio device
* register
}
EXPORT_SYMBOL_GPL(mdiobus_modify);
+/**
+ * mdiobus_c45_modify - Convenience function for modifying a given mdio device
+ * register
+ * @bus: the mii_bus struct
+ * @addr: the phy address
+ * @devad: device address to read
+ * @regnum: register number to write
+ * @mask: bit mask of bits to clear
+ * @set: bit mask of bits to set
+ */
+int mdiobus_c45_modify(struct mii_bus *bus, int addr, int devad, u32 regnum,
+ u16 mask, u16 set)
+{
+ int err;
+
+ mutex_lock(&bus->mdio_lock);
+ err = __mdiobus_c45_modify_changed(bus, addr, devad, regnum,
+ mask, set);
+ mutex_unlock(&bus->mdio_lock);
+
+ return err < 0 ? err : 0;
+}
+EXPORT_SYMBOL_GPL(mdiobus_c45_modify);
+
/**
* mdiobus_modify_changed - Convenience function for modifying a given mdio
* device register and returning if it changed
}
EXPORT_SYMBOL_GPL(mdiobus_modify_changed);
+/**
+ * mdiobus_c45_modify_changed - Convenience function for modifying a given mdio
+ * device register and returning if it changed
+ * @bus: the mii_bus struct
+ * @addr: the phy address
+ * @devad: device address to read
+ * @regnum: register number to write
+ * @mask: bit mask of bits to clear
+ * @set: bit mask of bits to set
+ */
+int mdiobus_c45_modify_changed(struct mii_bus *bus, int devad, int addr,
+ u32 regnum, u16 mask, u16 set)
+{
+ int err;
+
+ mutex_lock(&bus->mdio_lock);
+ err = __mdiobus_c45_modify_changed(bus, addr, devad, regnum, mask, set);
+ mutex_unlock(&bus->mdio_lock);
+
+ return err;
+}
+EXPORT_SYMBOL_GPL(mdiobus_c45_modify_changed);
+
/**
* mdio_bus_match - determine if given MDIO driver supports the given
* MDIO device
return 0;
}
- static int mdio_uevent(struct device *dev, struct kobj_uevent_env *env)
+ static int mdio_uevent(const struct device *dev, struct kobj_uevent_env *env)
{
int rc;
struct nd_dax *to_nd_dax(struct device *dev);
#if IS_ENABLED(CONFIG_NVDIMM_DAX)
int nd_dax_probe(struct device *dev, struct nd_namespace_common *ndns);
- bool is_nd_dax(struct device *dev);
+ bool is_nd_dax(const struct device *dev);
struct device *nd_dax_create(struct nd_region *nd_region);
#else
static inline int nd_dax_probe(struct device *dev,
return -ENODEV;
}
- static inline bool is_nd_dax(struct device *dev)
+ static inline bool is_nd_dax(const struct device *dev)
{
return false;
}
struct nd_namespace_common *ndns);
#if IS_ENABLED(CONFIG_ND_CLAIM)
/* max struct page size independent of kernel config */
-#define MAX_STRUCT_PAGE_SIZE 128
+#define MAX_STRUCT_PAGE_SIZE 64
int nvdimm_setup_pfn(struct nd_pfn *nd_pfn, struct dev_pagemap *pgmap);
#else
static inline int nvdimm_setup_pfn(struct nd_pfn *nd_pfn,
}
EXPORT_SYMBOL(of_device_get_match_data);
- static ssize_t of_device_get_modalias(struct device *dev, char *str, ssize_t len)
+ static ssize_t of_device_get_modalias(const struct device *dev, char *str, ssize_t len)
{
const char *compat;
char *c;
ssize_t csize;
ssize_t tsize;
- if ((!dev) || (!dev->of_node))
+ if ((!dev) || (!dev->of_node) || dev->of_node_reused)
return -ENODEV;
/* Name & Type */
mutex_unlock(&of_mutex);
}
- int of_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env)
+ int of_device_uevent_modalias(const struct device *dev, struct kobj_uevent_env *env)
{
int sl;
- if ((!dev) || (!dev->of_node))
+ if ((!dev) || (!dev->of_node) || dev->of_node_reused)
return -ENODEV;
/* Devicetree modalias is tricky, we add it in 2 steps */
sl = of_device_get_modalias(dev, &env->buf[env->buflen-1],
sizeof(env->buf) - env->buflen);
+ if (sl < 0)
+ return sl;
if (sl >= (sizeof(env->buf) - env->buflen))
return -ENOMEM;
env->buflen += sl;
return of_device_get_match_data(dev);
}
- static bool of_is_ancestor_of(struct device_node *test_ancestor,
- struct device_node *child)
- {
- of_node_get(child);
- while (child) {
- if (child == test_ancestor) {
- of_node_put(child);
- return true;
- }
- child = of_get_next_parent(child);
- }
- return false;
- }
-
static struct device_node *of_get_compat_node(struct device_node *np)
{
of_node_get(np);
return node;
}
- /**
- * of_link_to_phandle - Add fwnode link to supplier from supplier phandle
- * @con_np: consumer device tree node
- * @sup_np: supplier device tree node
- *
- * Given a phandle to a supplier device tree node (@sup_np), this function
- * finds the device that owns the supplier device tree node and creates a
- * device link from @dev consumer device to the supplier device. This function
- * doesn't create device links for invalid scenarios such as trying to create a
- * link with a parent device as the consumer of its child device. In such
- * cases, it returns an error.
- *
- * Returns:
- * - 0 if fwnode link successfully created to supplier
- * - -EINVAL if the supplier link is invalid and should not be created
- * - -ENODEV if struct device will never be create for supplier
- */
- static int of_link_to_phandle(struct device_node *con_np,
+ static void of_link_to_phandle(struct device_node *con_np,
struct device_node *sup_np)
{
- struct device *sup_dev;
- struct device_node *tmp_np = sup_np;
+ struct device_node *tmp_np = of_node_get(sup_np);
- /*
- * Find the device node that contains the supplier phandle. It may be
- * @sup_np or it may be an ancestor of @sup_np.
- */
- sup_np = of_get_compat_node(sup_np);
- if (!sup_np) {
- pr_debug("Not linking %pOFP to %pOFP - No device\n",
- con_np, tmp_np);
- return -ENODEV;
- }
+ /* Check that sup_np and its ancestors are available. */
+ while (tmp_np) {
+ if (of_fwnode_handle(tmp_np)->dev) {
+ of_node_put(tmp_np);
+ break;
+ }
- /*
- * Don't allow linking a device node as a consumer of one of its
- * descendant nodes. By definition, a child node can't be a functional
- * dependency for the parent node.
- */
- if (of_is_ancestor_of(con_np, sup_np)) {
- pr_debug("Not linking %pOFP to %pOFP - is descendant\n",
- con_np, sup_np);
- of_node_put(sup_np);
- return -EINVAL;
- }
+ if (!of_device_is_available(tmp_np)) {
+ of_node_put(tmp_np);
+ return;
+ }
- /*
- * Don't create links to "early devices" that won't have struct devices
- * created for them.
- */
- sup_dev = get_dev_from_fwnode(&sup_np->fwnode);
- if (!sup_dev &&
- (of_node_check_flag(sup_np, OF_POPULATED) ||
- sup_np->fwnode.flags & FWNODE_FLAG_NOT_DEVICE)) {
- pr_debug("Not linking %pOFP to %pOFP - No struct device\n",
- con_np, sup_np);
- of_node_put(sup_np);
- return -ENODEV;
+ tmp_np = of_get_next_parent(tmp_np);
}
- put_device(sup_dev);
fwnode_link_add(of_fwnode_handle(con_np), of_fwnode_handle(sup_np));
- of_node_put(sup_np);
-
- return 0;
}
/**
if (strcmp(prop_name, list_name))
return NULL;
- if (of_parse_phandle_with_args(np, list_name, cells_name, index,
- &sup_args))
+ if (__of_parse_phandle_with_args(np, list_name, cells_name, 0, index,
+ &sup_args))
return NULL;
return sup_args.np;
DEFINE_SIMPLE_PROP(power_domains, "power-domains", "#power-domain-cells")
DEFINE_SIMPLE_PROP(hwlocks, "hwlocks", "#hwlock-cells")
DEFINE_SIMPLE_PROP(extcon, "extcon", NULL)
-DEFINE_SIMPLE_PROP(nvmem_cells, "nvmem-cells", NULL)
+DEFINE_SIMPLE_PROP(nvmem_cells, "nvmem-cells", "#nvmem-cell-cells")
DEFINE_SIMPLE_PROP(phys, "phys", "#phy-cells")
DEFINE_SIMPLE_PROP(wakeup_parent, "wakeup-parent", NULL)
DEFINE_SIMPLE_PROP(pinctrl0, "pinctrl-0", NULL)
};
ATTRIBUTE_GROUPS(ssam_device);
- static int ssam_device_uevent(struct device *dev, struct kobj_uevent_env *env)
+ static int ssam_device_uevent(const struct device *dev, struct kobj_uevent_env *env)
{
- struct ssam_device *sdev = to_ssam_device(dev);
+ const struct ssam_device *sdev = to_ssam_device(dev);
return add_uevent_var(env, "MODALIAS=ssam:d%02Xc%02Xt%02Xi%02Xf%02X",
sdev->uid.domain, sdev->uid.category,
* is always valid and can be used for requests as long as the client
* device we add here is registered as child under it. This essentially
* guarantees that the client driver can always expect the preconditions
- * for functions like ssam_request_sync (controller has to be started
- * and is not suspended) to hold and thus does not have to check for
- * them.
+ * for functions like ssam_request_do_sync() (controller has to be
+ * started and is not suspended) to hold and thus does not have to check
+ * for them.
*
* Note that for this to work, the controller has to be a parent device.
* If it is not a direct parent, care has to be taken that the device is
spin_unlock_irqrestore(&slow_subchannel_lock, flags);
}
-static int __unset_registered(struct device *dev, void *data)
+static int __unset_validpath(struct device *dev, void *data)
{
struct idset *set = data;
struct subchannel *sch = to_subchannel(dev);
+ struct pmcw *pmcw = &sch->schib.pmcw;
+
+ /* Here we want to make sure that we are considering only those subchannels
+ * which do not have an operational device attached to it. This can be found
+ * with the help of PAM and POM values of pmcw. OPM provides the information
+ * about any path which is currently vary-off, so that we should not consider.
+ */
+ if (sch->st == SUBCHANNEL_TYPE_IO &&
+ (sch->opm & pmcw->pam & pmcw->pom))
+ idset_sch_del(set, sch->schid);
- idset_sch_del(set, sch->schid);
return 0;
}
}
idset_fill(set);
switch (cond) {
- case CSS_EVAL_UNREG:
- bus_for_each_dev(&css_bus_type, NULL, set, __unset_registered);
+ case CSS_EVAL_NO_PATH:
+ bus_for_each_dev(&css_bus_type, NULL, set, __unset_validpath);
break;
case CSS_EVAL_NOT_ONLINE:
bus_for_each_dev(&css_bus_type, NULL, set, __unset_online);
flush_workqueue(cio_work_q);
}
-/* Schedule reprobing of all unregistered subchannels. */
+/* Schedule reprobing of all subchannels with no valid operational path. */
void css_schedule_reprobe(void)
{
/* Schedule with a delay to allow merging of subsequent calls. */
- css_schedule_eval_cond(CSS_EVAL_UNREG, 1 * HZ);
+ css_schedule_eval_cond(CSS_EVAL_NO_PATH, 1 * HZ);
}
EXPORT_SYMBOL_GPL(css_schedule_reprobe);
sch->driver->shutdown(sch);
}
- static int css_uevent(struct device *dev, struct kobj_uevent_env *env)
+ static int css_uevent(const struct device *dev, struct kobj_uevent_env *env)
{
- struct subchannel *sch = to_subchannel(dev);
+ const struct subchannel *sch = to_subchannel(dev);
int ret;
ret = add_uevent_var(env, "ST=%01X", sch->st);
* specified size. Return length of resulting string (excluding trailing '\0')
* even if string doesn't fit buffer (snprintf semantics). */
static int snprint_alias(char *buf, size_t size,
- struct ccw_device_id *id, const char *suffix)
+ const struct ccw_device_id *id, const char *suffix)
{
int len;
/* Set up environment variables for ccw device uevent. Return 0 on success,
* non-zero otherwise. */
- static int ccw_uevent(struct device *dev, struct kobj_uevent_env *env)
+ static int ccw_uevent(const struct device *dev, struct kobj_uevent_env *env)
{
- struct ccw_device *cdev = to_ccwdev(dev);
- struct ccw_device_id *id = &(cdev->id);
+ const struct ccw_device *cdev = to_ccwdev(dev);
+ const struct ccw_device_id *id = &(cdev->id);
int ret;
char modalias_buf[30];
static void ccw_device_unregister(struct ccw_device *cdev)
{
+ mutex_lock(&cdev->reg_mutex);
if (device_is_registered(&cdev->dev)) {
/* Undo device_add(). */
device_del(&cdev->dev);
}
+ mutex_unlock(&cdev->reg_mutex);
+
if (cdev->private->flags.initialized) {
cdev->private->flags.initialized = 0;
/* Release reference from device_initialize(). */
{
int ret;
+ mutex_lock(&cdev->reg_mutex);
if (device_is_registered(&cdev->dev)) {
device_release_driver(&cdev->dev);
ret = device_attach(&cdev->dev);
WARN_ON(ret == -ENODEV);
}
+ mutex_unlock(&cdev->reg_mutex);
}
static void
INIT_LIST_HEAD(&priv->cmb_list);
init_waitqueue_head(&priv->wait_q);
timer_setup(&priv->timer, ccw_device_timeout, 0);
+ mutex_init(&cdev->reg_mutex);
atomic_set(&priv->onoff, 0);
cdev->ccwlock = sch->lock;
* be registered). We need to reprobe since we may now have sense id
* information.
*/
+ mutex_lock(&cdev->reg_mutex);
if (device_is_registered(&cdev->dev)) {
if (!cdev->drv) {
ret = device_reprobe(&cdev->dev);
spin_lock_irqsave(sch->lock, flags);
sch_set_cdev(sch, NULL);
spin_unlock_irqrestore(sch->lock, flags);
+ mutex_unlock(&cdev->reg_mutex);
/* Release initial device reference. */
put_device(&cdev->dev);
goto out_err;
}
out:
cdev->private->flags.recog_done = 1;
+ mutex_unlock(&cdev->reg_mutex);
wake_up(&cdev->private->wait_q);
out_err:
if (adjust_init_count && atomic_dec_and_test(&ccw_device_init_count))
struct scsi_vpd *vpd_pgb0 = NULL, *vpd_pgb1 = NULL, *vpd_pgb2 = NULL;
unsigned long flags;
+ might_sleep();
+
scsi_dh_release_device(sdev);
parent = sdev->sdev_gendev.parent;
return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0;
}
- static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
+ static int scsi_bus_uevent(const struct device *dev, struct kobj_uevent_env *env)
{
- struct scsi_device *sdev;
+ const struct scsi_device *sdev;
if (dev->type != &scsi_dev_type)
return 0;
return strcmp(spi->modalias, drv->name) == 0;
}
- static int spi_uevent(struct device *dev, struct kobj_uevent_env *env)
+ static int spi_uevent(const struct device *dev, struct kobj_uevent_env *env)
{
const struct spi_device *spi = to_spi_device(dev);
int rc;
}
dev_set_name(&spi->dev, "%s.%u", dev_name(&spi->controller->dev),
- spi->chip_select);
+ spi_get_chipselect(spi, 0));
}
static int spi_dev_check(struct device *dev, void *data)
struct spi_device *new_spi = data;
if (spi->controller == new_spi->controller &&
- spi->chip_select == new_spi->chip_select)
+ spi_get_chipselect(spi, 0) == spi_get_chipselect(new_spi, 0))
return -EBUSY;
return 0;
}
status = bus_for_each_dev(&spi_bus_type, NULL, spi, spi_dev_check);
if (status) {
dev_err(dev, "chipselect %d already in use\n",
- spi->chip_select);
+ spi_get_chipselect(spi, 0));
return status;
}
}
if (ctlr->cs_gpiods)
- spi->cs_gpiod = ctlr->cs_gpiods[spi->chip_select];
+ spi_set_csgpiod(spi, 0, ctlr->cs_gpiods[spi_get_chipselect(spi, 0)]);
/*
* Drivers may modify this initial i/o setup, but will
int status;
/* Chipselects are numbered 0..max; validate. */
- if (spi->chip_select >= ctlr->num_chipselect) {
- dev_err(dev, "cs%d >= max %d\n", spi->chip_select,
+ if (spi_get_chipselect(spi, 0) >= ctlr->num_chipselect) {
+ dev_err(dev, "cs%d >= max %d\n", spi_get_chipselect(spi, 0),
ctlr->num_chipselect);
return -EINVAL;
}
struct device *dev = ctlr->dev.parent;
/* Chipselects are numbered 0..max; validate. */
- if (spi->chip_select >= ctlr->num_chipselect) {
- dev_err(dev, "cs%d >= max %d\n", spi->chip_select,
+ if (spi_get_chipselect(spi, 0) >= ctlr->num_chipselect) {
+ dev_err(dev, "cs%d >= max %d\n", spi_get_chipselect(spi, 0),
ctlr->num_chipselect);
return -EINVAL;
}
WARN_ON(strlen(chip->modalias) >= sizeof(proxy->modalias));
- proxy->chip_select = chip->chip_select;
+ spi_set_chipselect(proxy, 0, chip->chip_select);
proxy->max_speed_hz = chip->max_speed_hz;
proxy->mode = chip->mode;
proxy->irq = chip->irq;
* Avoid calling into the driver (or doing delays) if the chip select
* isn't actually changing from the last time this was called.
*/
- if (!force && ((enable && spi->controller->last_cs == spi->chip_select) ||
- (!enable && spi->controller->last_cs != spi->chip_select)) &&
+ if (!force && ((enable && spi->controller->last_cs == spi_get_chipselect(spi, 0)) ||
+ (!enable && spi->controller->last_cs != spi_get_chipselect(spi, 0))) &&
(spi->controller->last_cs_mode_high == (spi->mode & SPI_CS_HIGH)))
return;
trace_spi_set_cs(spi, activate);
- spi->controller->last_cs = enable ? spi->chip_select : -1;
+ spi->controller->last_cs = enable ? spi_get_chipselect(spi, 0) : -1;
spi->controller->last_cs_mode_high = spi->mode & SPI_CS_HIGH;
- if ((spi->cs_gpiod || !spi->controller->set_cs_timing) && !activate) {
+ if ((spi_get_csgpiod(spi, 0) || !spi->controller->set_cs_timing) && !activate)
spi_delay_exec(&spi->cs_hold, NULL);
- }
if (spi->mode & SPI_CS_HIGH)
enable = !enable;
- if (spi->cs_gpiod) {
+ if (spi_get_csgpiod(spi, 0)) {
if (!(spi->mode & SPI_NO_CS)) {
/*
* Historically ACPI has no means of the GPIO polarity and
* into account.
*/
if (has_acpi_companion(&spi->dev))
- gpiod_set_value_cansleep(spi->cs_gpiod, !enable);
+ gpiod_set_value_cansleep(spi_get_csgpiod(spi, 0), !enable);
else
/* Polarity handled by GPIO library */
- gpiod_set_value_cansleep(spi->cs_gpiod, activate);
+ gpiod_set_value_cansleep(spi_get_csgpiod(spi, 0), activate);
}
/* Some SPI masters need both GPIO CS & slave_select */
if ((spi->controller->flags & SPI_MASTER_GPIO_SS) &&
spi->controller->set_cs(spi, !enable);
}
- if (spi->cs_gpiod || !spi->controller->set_cs_timing) {
+ if (spi_get_csgpiod(spi, 0) || !spi->controller->set_cs_timing) {
if (activate)
spi_delay_exec(&spi->cs_setup, NULL);
else
}
}
+void spi_transfer_cs_change_delay_exec(struct spi_message *msg,
+ struct spi_transfer *xfer)
+{
+ _spi_transfer_cs_change_delay(msg, xfer);
+}
+EXPORT_SYMBOL_GPL(spi_transfer_cs_change_delay_exec);
+
/*
* spi_transfer_one_message - Default implementation of transfer_one_message()
*
/* Capture the resolution of the timestamp */
xfer->ptp_sts_word_post = progress;
- xfer->timestamped = true;
+ xfer->timestamped = 1;
}
EXPORT_SYMBOL_GPL(spi_take_timestamp_post);
/*-------------------------------------------------------------------------*/
#if defined(CONFIG_OF)
+static void of_spi_parse_dt_cs_delay(struct device_node *nc,
+ struct spi_delay *delay, const char *prop)
+{
+ u32 value;
+
+ if (!of_property_read_u32(nc, prop, &value)) {
+ if (value > U16_MAX) {
+ delay->value = DIV_ROUND_UP(value, 1000);
+ delay->unit = SPI_DELAY_UNIT_USECS;
+ } else {
+ delay->value = value;
+ delay->unit = SPI_DELAY_UNIT_NSECS;
+ }
+ }
+}
+
static int of_spi_parse_dt(struct spi_controller *ctlr, struct spi_device *spi,
struct device_node *nc)
{
u32 value;
- u16 cs_setup;
int rc;
/* Mode (clock phase/polarity/etc.) */
nc, rc);
return rc;
}
- spi->chip_select = value;
+ spi_set_chipselect(spi, 0, value);
/* Device speed */
if (!of_property_read_u32(nc, "spi-max-frequency", &value))
spi->max_speed_hz = value;
- if (!of_property_read_u16(nc, "spi-cs-setup-delay-ns", &cs_setup)) {
- spi->cs_setup.value = cs_setup;
- spi->cs_setup.unit = SPI_DELAY_UNIT_NSECS;
- }
+ /* Device CS delays */
+ of_spi_parse_dt_cs_delay(nc, &spi->cs_setup, "spi-cs-setup-delay-ns");
+ of_spi_parse_dt_cs_delay(nc, &spi->cs_hold, "spi-cs-hold-delay-ns");
+ of_spi_parse_dt_cs_delay(nc, &spi->cs_inactive, "spi-cs-inactive-delay-ns");
return 0;
}
strscpy(ancillary->modalias, "dummy", sizeof(ancillary->modalias));
/* Use provided chip-select for ancillary device */
- ancillary->chip_select = chip_select;
+ spi_set_chipselect(ancillary, 0, chip_select);
/* Take over SPI mode/speed from SPI main device */
ancillary->max_speed_hz = spi->max_speed_hz;
spi->mode |= lookup.mode;
spi->irq = lookup.irq;
spi->bits_per_word = lookup.bits_per_word;
- spi->chip_select = lookup.chip_select;
+ spi_set_chipselect(spi, 0, lookup.chip_select);
return spi;
}
* The controller may implement only the high-level SPI-memory like
* operations if it does not support regular SPI transfers, and this is
* valid use case.
- * If ->mem_ops is NULL, we request that at least one of the
- * ->transfer_xxx() method be implemented.
+ * If ->mem_ops or ->mem_ops->exec_op is NULL, we request that at least
+ * one of the ->transfer_xxx() method be implemented.
*/
- if (ctlr->mem_ops) {
- if (!ctlr->mem_ops->exec_op)
- return -EINVAL;
- } else if (!ctlr->transfer && !ctlr->transfer_one &&
+ if (!ctlr->mem_ops || (ctlr->mem_ops && !ctlr->mem_ops->exec_op)) {
+ if (!ctlr->transfer && !ctlr->transfer_one &&
!ctlr->transfer_one_message) {
- return -EINVAL;
+ return -EINVAL;
+ }
}
return 0;
struct device *parent = spi->controller->dev.parent;
int status = 0;
- if (spi->controller->set_cs_timing && !spi->cs_gpiod) {
+ if (spi->controller->set_cs_timing && !spi_get_csgpiod(spi, 0)) {
if (spi->controller->auto_runtime_pm) {
status = pm_runtime_get_sync(parent);
if (status < 0) {
* cs_change is set for each transfer.
*/
if ((spi->mode & SPI_CS_WORD) && (!(ctlr->mode_bits & SPI_CS_WORD) ||
- spi->cs_gpiod)) {
+ spi_get_csgpiod(spi, 0))) {
size_t maxsize;
int ret;
while (retries--) {
state = tb_port_state(port);
- if (state < 0)
- return state;
- if (state == TB_PORT_DISABLED) {
+ switch (state) {
+ case TB_PORT_DISABLED:
tb_port_dbg(port, "is disabled (state: 0)\n");
return 0;
- }
- if (state == TB_PORT_UNPLUGGED) {
+
+ case TB_PORT_UNPLUGGED:
if (wait_if_unplugged) {
/* used during resume */
tb_port_dbg(port,
"is unplugged (state: 7), retrying...\n");
msleep(100);
- continue;
+ break;
}
tb_port_dbg(port, "is unplugged (state: 7)\n");
return 0;
- }
- if (state == TB_PORT_UP) {
- tb_port_dbg(port, "is connected, link is up (state: 2)\n");
+
+ case TB_PORT_UP:
+ case TB_PORT_TX_CL0S:
+ case TB_PORT_RX_CL0S:
+ case TB_PORT_CL1:
+ case TB_PORT_CL2:
+ tb_port_dbg(port, "is connected, link is up (state: %d)\n", state);
return 1;
+
+ default:
+ if (state < 0)
+ return state;
+
+ /*
+ * After plug-in the state is TB_PORT_CONNECTING. Give it some
+ * time.
+ */
+ tb_port_dbg(port,
+ "is connected, link is not up (state: %d), retrying...\n",
+ state);
+ msleep(100);
}
- /*
- * After plug-in the state is TB_PORT_CONNECTING. Give it some
- * time.
- */
- tb_port_dbg(port,
- "is connected, link is not up (state: %d), retrying...\n",
- state);
- msleep(100);
}
tb_port_warn(port,
"failed to reach state TB_PORT_UP. Ignoring port...\n");
kfree(sw);
}
- static int tb_switch_uevent(struct device *dev, struct kobj_uevent_env *env)
+ static int tb_switch_uevent(const struct device *dev, struct kobj_uevent_env *env)
{
- struct tb_switch *sw = tb_to_switch(dev);
+ const struct tb_switch *sw = tb_to_switch(dev);
const char *type;
if (sw->config.thunderbolt_version == USB4_VERSION_1_0) {
enum tb_clx clx;
};
+/**
+ * struct tb_bandwidth_group - Bandwidth management group
+ * @tb: Pointer to the domain the group belongs to
+ * @index: Index of the group (aka Group_ID). Valid values %1-%7
+ * @ports: DP IN adapters belonging to this group are linked here
+ *
+ * Any tunnel that requires isochronous bandwidth (that's DP for now) is
+ * attached to a bandwidth group. All tunnels going through the same
+ * USB4 links share the same group and can dynamically distribute the
+ * bandwidth within the group.
+ */
+struct tb_bandwidth_group {
+ struct tb *tb;
+ int index;
+ struct list_head ports;
+};
+
/**
* struct tb_port - a thunderbolt port, part of a tb_switch
* @config: Cached port configuration read from registers
* @ctl_credits: Buffers reserved for control path
* @dma_credits: Number of credits allocated for DMA tunneling for all
* DMA paths through this port.
+ * @group: Bandwidth allocation group the adapter is assigned to. Only
+ * used for DP IN adapters for now.
+ * @group_list: The adapter is linked to the group's list of ports through this
*
* In USB4 terminology this structure represents an adapter (protocol or
* lane adapter).
unsigned int total_credits;
unsigned int ctl_credits;
unsigned int dma_credits;
+ struct tb_bandwidth_group *group;
+ struct list_head group_list;
};
/**
return dev->type == &tb_switch_type;
}
- static inline struct tb_switch *tb_to_switch(struct device *dev)
+ static inline struct tb_switch *tb_to_switch(const struct device *dev)
{
if (tb_is_switch(dev))
return container_of(dev, struct tb_switch, dev);
int tb_port_wait_for_link_width(struct tb_port *port, int width,
int timeout_msec);
int tb_port_update_credits(struct tb_port *port);
-bool tb_port_is_clx_enabled(struct tb_port *port, enum tb_clx clx);
+bool tb_port_is_clx_enabled(struct tb_port *port, unsigned int clx);
int tb_switch_find_vse_cap(struct tb_switch *sw, enum tb_switch_vse_cap vsec);
int tb_switch_find_cap(struct tb_switch *sw, enum tb_switch_cap cap);
int usb4_usb3_port_release_bandwidth(struct tb_port *port, int *upstream_bw,
int *downstream_bw);
+int usb4_dp_port_set_cm_id(struct tb_port *port, int cm_id);
+bool usb4_dp_port_bw_mode_supported(struct tb_port *port);
+bool usb4_dp_port_bw_mode_enabled(struct tb_port *port);
+int usb4_dp_port_set_cm_bw_mode_supported(struct tb_port *port, bool supported);
+int usb4_dp_port_group_id(struct tb_port *port);
+int usb4_dp_port_set_group_id(struct tb_port *port, int group_id);
+int usb4_dp_port_nrd(struct tb_port *port, int *rate, int *lanes);
+int usb4_dp_port_set_nrd(struct tb_port *port, int rate, int lanes);
+int usb4_dp_port_granularity(struct tb_port *port);
+int usb4_dp_port_set_granularity(struct tb_port *port, int granularity);
+int usb4_dp_port_set_estimated_bw(struct tb_port *port, int bw);
+int usb4_dp_port_allocated_bw(struct tb_port *port);
+int usb4_dp_port_allocate_bw(struct tb_port *port, int bw);
+int usb4_dp_port_requested_bw(struct tb_port *port);
+
static inline bool tb_is_usb4_port_device(const struct device *dev)
{
return dev->type == &usb4_port_device_type;
return 0;
}
- static int ulpi_uevent(struct device *dev, struct kobj_uevent_env *env)
+ static int ulpi_uevent(const struct device *dev, struct kobj_uevent_env *env)
{
- struct ulpi *ulpi = to_ulpi_dev(dev);
+ const struct ulpi *ulpi = to_ulpi_dev(dev);
int ret;
ret = of_device_uevent_modalias(dev, env);
}
DEFINE_SHOW_ATTRIBUTE(ulpi_regs);
-#define ULPI_ROOT debugfs_lookup(KBUILD_MODNAME, NULL)
+static struct dentry *ulpi_root;
static int ulpi_register(struct device *dev, struct ulpi *ulpi)
{
return ret;
}
- root = debugfs_create_dir(dev_name(dev), ULPI_ROOT);
+ root = debugfs_create_dir(dev_name(dev), ulpi_root);
debugfs_create_file("regs", 0444, root, ulpi, &ulpi_regs_fops);
dev_dbg(&ulpi->dev, "registered ULPI PHY: vendor %04x, product %04x\n",
*/
void ulpi_unregister_interface(struct ulpi *ulpi)
{
- debugfs_remove_recursive(debugfs_lookup(dev_name(&ulpi->dev),
- ULPI_ROOT));
+ debugfs_lookup_and_remove(dev_name(&ulpi->dev), ulpi_root);
device_unregister(&ulpi->dev);
}
EXPORT_SYMBOL_GPL(ulpi_unregister_interface);
static int __init ulpi_init(void)
{
int ret;
- struct dentry *root;
- root = debugfs_create_dir(KBUILD_MODNAME, NULL);
+ ulpi_root = debugfs_create_dir(KBUILD_MODNAME, NULL);
ret = bus_register(&ulpi_bus);
if (ret)
- debugfs_remove(root);
+ debugfs_remove(ulpi_root);
return ret;
}
subsys_initcall(ulpi_init);
static void __exit ulpi_exit(void)
{
bus_unregister(&ulpi_bus);
- debugfs_remove_recursive(ULPI_ROOT);
+ debugfs_remove(ulpi_root);
}
module_exit(ulpi_exit);
kfree(udev);
}
- static int usb_dev_uevent(struct device *dev, struct kobj_uevent_env *env)
+ static int usb_dev_uevent(const struct device *dev, struct kobj_uevent_env *env)
{
- struct usb_device *usb_dev;
+ const struct usb_device *usb_dev;
usb_dev = to_usb_device(dev);
#endif /* CONFIG_PM */
- static char *usb_devnode(struct device *dev,
+ static char *usb_devnode(const struct device *dev,
umode_t *mode, kuid_t *uid, kgid_t *gid)
{
- struct usb_device *usb_dev;
+ const struct usb_device *usb_dev;
usb_dev = to_usb_device(dev);
return kasprintf(GFP_KERNEL, "bus/usb/%03d/%03d",
static void usb_debugfs_cleanup(void)
{
- debugfs_remove(debugfs_lookup("devices", usb_debug_root));
+ debugfs_lookup_and_remove("devices", usb_debug_root);
}
/*
#include "bus.h"
#include "class.h"
#include "mux.h"
+#include "retimer.h"
+
+static inline int
+typec_altmode_set_retimer(struct altmode *alt, unsigned long conf, void *data)
+{
+ struct typec_retimer_state state;
+
+ if (!alt->retimer)
+ return 0;
+
+ state.alt = &alt->adev;
+ state.mode = conf;
+ state.data = data;
+
+ return typec_retimer_set(alt->retimer, &state);
+}
static inline int
typec_altmode_set_mux(struct altmode *alt, unsigned long conf, void *data)
return typec_mux_set(alt->mux, &state);
}
+/* Wrapper to set various Type-C port switches together. */
+static inline int
+typec_altmode_set_switches(struct altmode *alt, unsigned long conf, void *data)
+{
+ int ret;
+
+ ret = typec_altmode_set_retimer(alt, conf, data);
+ if (ret)
+ return ret;
+
+ return typec_altmode_set_mux(alt, conf, data);
+}
+
static int typec_altmode_set_state(struct typec_altmode *adev,
unsigned long conf, void *data)
{
port_altmode = is_port ? to_altmode(adev) : to_altmode(adev)->partner;
- return typec_altmode_set_mux(port_altmode, conf, data);
+ return typec_altmode_set_switches(port_altmode, conf, data);
}
/* -------------------------------------------------------------------------- */
is_port = is_typec_port(adev->dev.parent);
partner = altmode->partner;
- ret = typec_altmode_set_mux(is_port ? altmode : partner, conf, data);
+ ret = typec_altmode_set_switches(is_port ? altmode : partner, conf, data);
if (ret)
return ret;
return 0;
}
- static int typec_uevent(struct device *dev, struct kobj_uevent_env *env)
+ static int typec_uevent(const struct device *dev, struct kobj_uevent_env *env)
{
- struct typec_altmode *altmode = to_typec_altmode(dev);
+ const struct typec_altmode *altmode = to_typec_altmode(dev);
if (add_uevent_var(env, "SVID=%04X", altmode->svid))
return -ENOMEM;
{
if (IS_ERR_OR_NULL(adev))
return;
+ typec_retimer_put(to_altmode(adev)->retimer);
typec_mux_put(to_altmode(adev)->mux);
device_unregister(&adev->dev);
}
NULL
};
- static int typec_uevent(struct device *dev, struct kobj_uevent_env *env)
+ static int typec_uevent(const struct device *dev, struct kobj_uevent_env *env)
{
int ret;
{
struct typec_altmode *adev;
struct typec_mux *mux;
+ struct typec_retimer *retimer;
mux = typec_mux_get(&port->dev, desc);
if (IS_ERR(mux))
return ERR_CAST(mux);
+ retimer = typec_retimer_get(&port->dev);
+ if (IS_ERR(retimer)) {
+ typec_mux_put(mux);
+ return ERR_CAST(retimer);
+ }
+
adev = typec_register_altmode(&port->dev, desc);
- if (IS_ERR(adev))
+ if (IS_ERR(adev)) {
+ typec_retimer_put(retimer);
typec_mux_put(mux);
- else
+ } else {
to_altmode(adev)->mux = mux;
+ to_altmode(adev)->retimer = retimer;
+ }
return adev;
}
#include <net/inet_common.h>
#include <net/inet_connection_sock.h>
#include <net/request_sock.h>
+#include <trace/events/sock.h>
#include <xen/events.h>
#include <xen/grant_table.h>
RING_IDX cons, prod, size, array_size;
int ret;
+ atomic_set(&map->write, 0);
+
cons = intf->out_cons;
prod = intf->out_prod;
/* read the indexes before dealing with the data */
iov_iter_kvec(&msg.msg_iter, ITER_SOURCE, vec, 2, size);
}
- atomic_set(&map->write, 0);
ret = inet_sendmsg(map->sock, &msg, size);
if (ret == -EAGAIN) {
atomic_inc(&map->write);
struct sock_mapping *map = sock->sk_user_data;
struct pvcalls_ioworker *iow;
+ trace_sk_data_ready(sock);
+
if (map == NULL)
return;
unsigned long flags;
int notify;
+ trace_sk_data_ready(sock);
+
if (mappass == NULL)
return;
{
}
- static int pvcalls_back_uevent(struct xenbus_device *xdev,
+ static int pvcalls_back_uevent(const struct xenbus_device *xdev,
struct kobj_uevent_env *env)
{
return 0;
* so that we can use the file mode as part of a heuristic to determine whether
* to lock down individual files.
*/
-static int debugfs_setattr(struct user_namespace *mnt_userns,
+static int debugfs_setattr(struct mnt_idmap *idmap,
struct dentry *dentry, struct iattr *ia)
{
int ret;
if (ret)
return ret;
}
- return simple_setattr(&init_user_ns, dentry, ia);
+ return simple_setattr(&nop_mnt_idmap, dentry, ia);
}
static const struct inode_operations debugfs_file_inode_operations = {
* exist for rename to succeed.
*
* This function will return a pointer to old_dentry (which is updated to
- * reflect renaming) if it succeeds. If an error occurs, %NULL will be
- * returned.
+ * reflect renaming) if it succeeds. If an error occurs, ERR_PTR(-ERROR)
+ * will be returned.
*
* If debugfs is not enabled in the kernel, the value -%ENODEV will be
* returned.
take_dentry_name_snapshot(&old_name, old_dentry);
- error = simple_rename(&init_user_ns, d_inode(old_dir), old_dentry,
+ error = simple_rename(&nop_mnt_idmap, d_inode(old_dir), old_dentry,
d_inode(new_dir), dentry, 0);
if (error) {
release_dentry_name_snapshot(&old_name);
return ls->ls_uevent_result;
}
- static int dlm_uevent(struct kobject *kobj, struct kobj_uevent_env *env)
+ static int dlm_uevent(const struct kobject *kobj, struct kobj_uevent_env *env)
{
- struct dlm_ls *ls = container_of(kobj, struct dlm_ls, ls_kobj);
+ const struct dlm_ls *ls = container_of(kobj, struct dlm_ls, ls_kobj);
add_uevent_var(env, "LOCKSPACE=%s", ls->ls_name);
return 0;
{
int error;
- error = dlm_scand_start();
+ /* Thread for sending/receiving messages for all lockspace's */
+ error = dlm_midcomms_start();
if (error) {
- log_print("cannot start dlm_scand thread %d", error);
+ log_print("cannot start dlm midcomms %d", error);
goto fail;
}
- /* Thread for sending/receiving messages for all lockspace's */
- error = dlm_midcomms_start();
+ error = dlm_scand_start();
if (error) {
- log_print("cannot start dlm midcomms %d", error);
- goto scand_fail;
+ log_print("cannot start dlm_scand thread %d", error);
+ goto midcomms_fail;
}
return 0;
- scand_fail:
- dlm_scand_stop();
+ midcomms_fail:
+ dlm_midcomms_stop();
fail:
return error;
}
spin_lock_init(&ls->ls_rcom_spin);
get_random_bytes(&ls->ls_rcom_seq, sizeof(uint64_t));
ls->ls_recover_status = 0;
- ls->ls_recover_seq = 0;
+ ls->ls_recover_seq = get_random_u64();
ls->ls_recover_args = NULL;
init_rwsem(&ls->ls_in_recovery);
init_rwsem(&ls->ls_recv_active);
return rv;
}
+ if (ls_count == 1)
+ dlm_midcomms_version_wait();
+
dlm_device_deregister(ls);
if (force < 3 && dlm_user_daemon_available())
"Withdraw In Prog: %d\n"
"Remote Withdraw: %d\n"
"Withdraw Recovery: %d\n"
+ "Deactivating: %d\n"
"sd_log_error: %d\n"
"sd_log_flush_lock: %d\n"
"sd_log_num_revoke: %u\n"
test_bit(SDF_WITHDRAW_IN_PROG, &f),
test_bit(SDF_REMOTE_WITHDRAW, &f),
test_bit(SDF_WITHDRAW_RECOVERY, &f),
+ test_bit(SDF_DEACTIVATING, &f),
sdp->sd_log_error,
rwsem_is_locked(&sdp->sd_log_flush_lock),
sdp->sd_log_num_revoke,
wait_for_completion(&sdp->sd_kobj_unregister);
}
- static int gfs2_uevent(struct kobject *kobj, struct kobj_uevent_env *env)
+ static int gfs2_uevent(const struct kobject *kobj, struct kobj_uevent_env *env)
{
- struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
- struct super_block *s = sdp->sd_vfs;
+ const struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
+ const struct super_block *s = sdp->sd_vfs;
add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
if (kn_from == kn_to)
return strlcpy(buf, "/", buflen);
- if (!buf)
- return -EINVAL;
-
common = kernfs_common_ancestor(kn_from, kn_to);
if (WARN_ON(!common))
return -EINVAL;
return d_splice_alias(inode, dentry);
}
-static int kernfs_iop_mkdir(struct user_namespace *mnt_userns,
+static int kernfs_iop_mkdir(struct mnt_idmap *idmap,
struct inode *dir, struct dentry *dentry,
umode_t mode)
{
return ret;
}
-static int kernfs_iop_rename(struct user_namespace *mnt_userns,
+static int kernfs_iop_rename(struct mnt_idmap *idmap,
struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry,
unsigned int flags)
#define MIPI_DSI_MODULE_PREFIX "mipi-dsi:"
- static inline struct mipi_dsi_device *to_mipi_dsi_device(struct device *dev)
- {
- return container_of(dev, struct mipi_dsi_device, dev);
- }
+ #define to_mipi_dsi_device(__dev) container_of_const(__dev, struct mipi_dsi_device, dev)
/**
* mipi_dsi_pixel_format_to_bpp - obtain the number of bits per pixel for any
u16 brightness);
int mipi_dsi_dcs_get_display_brightness(struct mipi_dsi_device *dsi,
u16 *brightness);
+int mipi_dsi_dcs_set_display_brightness_large(struct mipi_dsi_device *dsi,
+ u16 brightness);
+int mipi_dsi_dcs_get_display_brightness_large(struct mipi_dsi_device *dsi,
+ u16 *brightness);
+
+/**
+ * mipi_dsi_generic_write_seq - transmit data using a generic write packet
+ * @dsi: DSI peripheral device
+ * @seq: buffer containing the payload
+ */
+#define mipi_dsi_generic_write_seq(dsi, seq...) \
+ do { \
+ static const u8 d[] = { seq }; \
+ struct device *dev = &dsi->dev; \
+ int ret; \
+ ret = mipi_dsi_generic_write(dsi, d, ARRAY_SIZE(d)); \
+ if (ret < 0) { \
+ dev_err_ratelimited(dev, "transmit data failed: %d\n", \
+ ret); \
+ return ret; \
+ } \
+ } while (0)
/**
* mipi_dsi_dcs_write_seq - transmit a DCS command with payload
* @cmd: Command
* @seq: buffer containing data to be transmitted
*/
-#define mipi_dsi_dcs_write_seq(dsi, cmd, seq...) do { \
- static const u8 d[] = { cmd, seq }; \
- struct device *dev = &dsi->dev; \
- int ret; \
- ret = mipi_dsi_dcs_write_buffer(dsi, d, ARRAY_SIZE(d)); \
- if (ret < 0) { \
- dev_err_ratelimited(dev, "sending command %#02x failed: %d\n", cmd, ret); \
- return ret; \
- } \
+#define mipi_dsi_dcs_write_seq(dsi, cmd, seq...) \
+ do { \
+ static const u8 d[] = { cmd, seq }; \
+ struct device *dev = &dsi->dev; \
+ int ret; \
+ ret = mipi_dsi_dcs_write_buffer(dsi, d, ARRAY_SIZE(d)); \
+ if (ret < 0) { \
+ dev_err_ratelimited( \
+ dev, "sending command %#02x failed: %d\n", \
+ cmd, ret); \
+ return ret; \
+ } \
} while (0)
/**
const void *acpi_device_get_match_data(const struct device *dev);
extern bool acpi_driver_match_device(struct device *dev,
const struct device_driver *drv);
- int acpi_device_uevent_modalias(struct device *, struct kobj_uevent_env *);
+ int acpi_device_uevent_modalias(const struct device *, struct kobj_uevent_env *);
int acpi_device_modalias(struct device *, char *, int);
struct platform_device *acpi_create_platform_device(struct acpi_device *,
return false;
}
+static inline bool acpi_check_dsm(acpi_handle handle, const guid_t *guid,
+ u64 rev, u64 funcs)
+{
+ return false;
+}
+
static inline union acpi_object *acpi_evaluate_dsm(acpi_handle handle,
const guid_t *guid,
u64 rev, u64 func,
return NULL;
}
- static inline int acpi_device_uevent_modalias(struct device *dev,
+static inline union acpi_object *acpi_evaluate_dsm_typed(acpi_handle handle,
+ const guid_t *guid,
+ u64 rev, u64 func,
+ union acpi_object *argv4,
+ acpi_object_type type)
+{
+ return NULL;
+}
+
+ static inline int acpi_device_uevent_modalias(const struct device *dev,
struct kobj_uevent_env *env)
{
return -ENODEV;
struct fw_attribute_group attribute_group;
};
- static inline struct fw_device *fw_device(struct device *dev)
- {
- return container_of(dev, struct fw_device, device);
- }
+ #define fw_device(dev) container_of_const(dev, struct fw_device, device)
static inline int fw_device_is_shutdown(struct fw_device *device)
{
struct fw_attribute_group attribute_group;
};
- static inline struct fw_unit *fw_unit(struct device *dev)
- {
- return container_of(dev, struct fw_unit, device);
- }
+ #define fw_unit(dev) container_of_const(dev, struct fw_unit, device)
static inline struct fw_unit *fw_unit_get(struct fw_unit *unit)
{
put_device(&unit->device);
}
- static inline struct fw_device *fw_parent_device(struct fw_unit *unit)
- {
- return fw_device(unit->device.parent);
- }
+ #define fw_parent_device(unit) fw_device(unit->device.parent)
struct ieee1394_device_id;
* Otherwise there is a danger of recursion of inbound and outbound
* transactions from and to the local node.
*
- * The callback is responsible that either fw_send_response() or kfree()
- * is called on the @request, except for FCP registers for which the core
- * takes care of that.
+ * The callback is responsible that fw_send_response() is called on the @request, except for FCP
+ * registers for which the core takes care of that.
*/
typedef void (*fw_address_callback_t)(struct fw_card *card,
struct fw_request *request,
} dynids;
int (*probe)(struct hv_device *, const struct hv_vmbus_device_id *);
- int (*remove)(struct hv_device *);
+ void (*remove)(struct hv_device *dev);
void (*shutdown)(struct hv_device *);
int (*suspend)(struct hv_device *);
};
- static inline struct hv_device *device_to_hv_device(struct device *d)
- {
- return container_of(d, struct hv_device, device);
- }
+ #define device_to_hv_device(d) container_of_const(d, struct hv_device, device)
static inline struct hv_driver *drv_to_hv_drv(struct device_driver *d)
{
struct spi_transfer;
struct spi_controller_mem_ops;
struct spi_controller_mem_caps;
+struct spi_message;
/*
* INTERFACES between SPI master-side drivers and SPI slave protocol handlers,
extern int spi_delay_to_ns(struct spi_delay *_delay, struct spi_transfer *xfer);
extern int spi_delay_exec(struct spi_delay *_delay, struct spi_transfer *xfer);
+extern void spi_transfer_cs_change_delay_exec(struct spi_message *msg,
+ struct spi_transfer *xfer);
/**
* struct spi_device - Controller side proxy for an SPI slave device
static_assert((SPI_MODE_KERNEL_MASK & SPI_MODE_USER_MASK) == 0,
"SPI_MODE_USER_MASK & SPI_MODE_KERNEL_MASK must not overlap");
- static inline struct spi_device *to_spi_device(struct device *dev)
+ static inline struct spi_device *to_spi_device(const struct device *dev)
{
return dev ? container_of(dev, struct spi_device, dev) : NULL;
}
return dev_get_drvdata(&spi->dev);
}
-struct spi_message;
+static inline u8 spi_get_chipselect(struct spi_device *spi, u8 idx)
+{
+ return spi->chip_select;
+}
+
+static inline void spi_set_chipselect(struct spi_device *spi, u8 idx, u8 chipselect)
+{
+ spi->chip_select = chipselect;
+}
+
+static inline struct gpio_desc *spi_get_csgpiod(struct spi_device *spi, u8 idx)
+{
+ return spi->cs_gpiod;
+}
+
+static inline void spi_set_csgpiod(struct spi_device *spi, u8 idx, struct gpio_desc *csgpiod)
+{
+ spi->cs_gpiod = csgpiod;
+}
/**
* struct spi_driver - Host side "protocol" driver
void *rx_buf;
unsigned len;
+#define SPI_TRANS_FAIL_NO_START BIT(0)
+ u16 error;
+
dma_addr_t tx_dma;
dma_addr_t rx_dma;
struct sg_table tx_sg;
unsigned cs_change:1;
unsigned tx_nbits:3;
unsigned rx_nbits:3;
+ unsigned timestamped:1;
#define SPI_NBITS_SINGLE 0x01 /* 1bit transfer */
#define SPI_NBITS_DUAL 0x02 /* 2bits transfer */
#define SPI_NBITS_QUAD 0x04 /* 4bits transfer */
struct ptp_system_timestamp *ptp_sts;
- bool timestamped;
-
struct list_head transfer_list;
-
-#define SPI_TRANS_FAIL_NO_START BIT(0)
- u16 error;
};
/**
* match_flags member of the device ID structure. Do not use them directly
* with struct ssam_device_id or struct ssam_device_uid.
*/
-#define SSAM_ANY_TID 0xffff
-#define SSAM_ANY_IID 0xffff
-#define SSAM_ANY_FUN 0xffff
+#define SSAM_SSH_TID_ANY 0xffff
+#define SSAM_SSH_IID_ANY 0xffff
+#define SSAM_SSH_FUN_ANY 0xffff
/**
* SSAM_DEVICE() - Initialize a &struct ssam_device_id with the given
*
* Initializes a &struct ssam_device_id with the given parameters. See &struct
* ssam_device_uid for details regarding the parameters. The special values
- * %SSAM_ANY_TID, %SSAM_ANY_IID, and %SSAM_ANY_FUN can be used to specify that
+ * %SSAM_SSH_TID_ANY, %SSAM_SSH_IID_ANY, and %SSAM_SSH_FUN_ANY can be used to specify that
* matching should ignore target ID, instance ID, and/or sub-function,
* respectively. This macro initializes the ``match_flags`` field based on the
* given parameters.
*
* Note: The parameters @d and @cat must be valid &u8 values, the parameters
- * @tid, @iid, and @fun must be either valid &u8 values or %SSAM_ANY_TID,
- * %SSAM_ANY_IID, or %SSAM_ANY_FUN, respectively. Other non-&u8 values are not
+ * @tid, @iid, and @fun must be either valid &u8 values or %SSAM_SSH_TID_ANY,
+ * %SSAM_SSH_IID_ANY, or %SSAM_SSH_FUN_ANY, respectively. Other non-&u8 values are not
* allowed.
*/
#define SSAM_DEVICE(d, cat, tid, iid, fun) \
- .match_flags = (((tid) != SSAM_ANY_TID) ? SSAM_MATCH_TARGET : 0) \
- | (((iid) != SSAM_ANY_IID) ? SSAM_MATCH_INSTANCE : 0) \
- | (((fun) != SSAM_ANY_FUN) ? SSAM_MATCH_FUNCTION : 0), \
+ .match_flags = (((tid) != SSAM_SSH_TID_ANY) ? SSAM_MATCH_TARGET : 0) \
+ | (((iid) != SSAM_SSH_IID_ANY) ? SSAM_MATCH_INSTANCE : 0) \
+ | (((fun) != SSAM_SSH_FUN_ANY) ? SSAM_MATCH_FUNCTION : 0), \
.domain = d, \
.category = cat, \
- .target = __builtin_choose_expr((tid) != SSAM_ANY_TID, (tid), 0), \
- .instance = __builtin_choose_expr((iid) != SSAM_ANY_IID, (iid), 0), \
- .function = __builtin_choose_expr((fun) != SSAM_ANY_FUN, (fun), 0)
+ .target = __builtin_choose_expr((tid) != SSAM_SSH_TID_ANY, (tid), 0), \
+ .instance = __builtin_choose_expr((iid) != SSAM_SSH_IID_ANY, (iid), 0), \
+ .function = __builtin_choose_expr((fun) != SSAM_SSH_FUN_ANY, (fun), 0)
/**
* SSAM_VDEV() - Initialize a &struct ssam_device_id as virtual device with
*
* Initializes a &struct ssam_device_id with the given parameters in the
* virtual domain. See &struct ssam_device_uid for details regarding the
- * parameters. The special values %SSAM_ANY_TID, %SSAM_ANY_IID, and
- * %SSAM_ANY_FUN can be used to specify that matching should ignore target ID,
+ * parameters. The special values %SSAM_SSH_TID_ANY, %SSAM_SSH_IID_ANY, and
+ * %SSAM_SSH_FUN_ANY can be used to specify that matching should ignore target ID,
* instance ID, and/or sub-function, respectively. This macro initializes the
* ``match_flags`` field based on the given parameters.
*
* Note: The parameter @cat must be a valid &u8 value, the parameters @tid,
- * @iid, and @fun must be either valid &u8 values or %SSAM_ANY_TID,
- * %SSAM_ANY_IID, or %SSAM_ANY_FUN, respectively. Other non-&u8 values are not
+ * @iid, and @fun must be either valid &u8 values or %SSAM_SSH_TID_ANY,
+ * %SSAM_SSH_IID_ANY, or %SSAM_SSH_FUN_ANY, respectively. Other non-&u8 values are not
* allowed.
*/
#define SSAM_VDEV(cat, tid, iid, fun) \
- SSAM_DEVICE(SSAM_DOMAIN_VIRTUAL, SSAM_VIRTUAL_TC_##cat, tid, iid, fun)
+ SSAM_DEVICE(SSAM_DOMAIN_VIRTUAL, SSAM_VIRTUAL_TC_##cat, SSAM_SSH_TID_##tid, iid, fun)
/**
* SSAM_SDEV() - Initialize a &struct ssam_device_id as physical SSH device
*
* Initializes a &struct ssam_device_id with the given parameters in the SSH
* domain. See &struct ssam_device_uid for details regarding the parameters.
- * The special values %SSAM_ANY_TID, %SSAM_ANY_IID, and %SSAM_ANY_FUN can be
- * used to specify that matching should ignore target ID, instance ID, and/or
- * sub-function, respectively. This macro initializes the ``match_flags``
- * field based on the given parameters.
+ * The special values %SSAM_SSH_TID_ANY, %SSAM_SSH_IID_ANY, and
+ * %SSAM_SSH_FUN_ANY can be used to specify that matching should ignore target
+ * ID, instance ID, and/or sub-function, respectively. This macro initializes
+ * the ``match_flags`` field based on the given parameters.
*
* Note: The parameter @cat must be a valid &u8 value, the parameters @tid,
- * @iid, and @fun must be either valid &u8 values or %SSAM_ANY_TID,
- * %SSAM_ANY_IID, or %SSAM_ANY_FUN, respectively. Other non-&u8 values are not
- * allowed.
+ * @iid, and @fun must be either valid &u8 values or %SSAM_SSH_TID_ANY,
+ * %SSAM_SSH_IID_ANY, or %SSAM_SSH_FUN_ANY, respectively. Other non-&u8 values
+ * are not allowed.
*/
#define SSAM_SDEV(cat, tid, iid, fun) \
- SSAM_DEVICE(SSAM_DOMAIN_SERIALHUB, SSAM_SSH_TC_##cat, tid, iid, fun)
+ SSAM_DEVICE(SSAM_DOMAIN_SERIALHUB, SSAM_SSH_TC_##cat, SSAM_SSH_TID_##tid, iid, fun)
/*
* enum ssam_device_flags - Flags for SSAM client devices.
* Return: Returns a pointer to the &struct ssam_device wrapping the given
* device @d.
*/
- static inline struct ssam_device *to_ssam_device(struct device *d)
- {
- return container_of(d, struct ssam_device, dev);
- }
+ #define to_ssam_device(d) container_of_const(d, struct ssam_device, dev)
/**
* to_ssam_device_driver() - Casts the given device driver to a SSAM client
* device of the request and by association the controller via which the
* request is sent.
*
- * Refer to ssam_request_sync_onstack() for more details on the behavior of
+ * Refer to ssam_request_do_sync_onstack() for more details on the behavior of
* the generated function.
*/
#define SSAM_DEFINE_SYNC_REQUEST_CL_N(name, spec...) \
* which the request is sent. The request's argument is specified via the
* ``arg`` pointer.
*
- * Refer to ssam_request_sync_onstack() for more details on the behavior of
+ * Refer to ssam_request_do_sync_onstack() for more details on the behavior of
* the generated function.
*/
#define SSAM_DEFINE_SYNC_REQUEST_CL_W(name, atype, spec...) \
* the request is sent. The request's return value is written to the memory
* pointed to by the ``ret`` parameter.
*
- * Refer to ssam_request_sync_onstack() for more details on the behavior of
+ * Refer to ssam_request_do_sync_onstack() for more details on the behavior of
* the generated function.
*/
#define SSAM_DEFINE_SYNC_REQUEST_CL_R(name, rtype, spec...) \
* specified via the ``arg`` pointer. The request's return value is written to
* the memory pointed to by the ``ret`` parameter.
*
- * Refer to ssam_request_sync_onstack() for more details on the behavior of
+ * Refer to ssam_request_do_sync_onstack() for more details on the behavior of
* the generated function.
*/
#define SSAM_DEFINE_SYNC_REQUEST_CL_WR(name, atype, rtype, spec...) \
int snd_hdac_device_register(struct hdac_device *codec);
void snd_hdac_device_unregister(struct hdac_device *codec);
int snd_hdac_device_set_chip_name(struct hdac_device *codec, const char *name);
- int snd_hdac_codec_modalias(struct hdac_device *hdac, char *buf, size_t size);
+ int snd_hdac_codec_modalias(const struct hdac_device *hdac, char *buf, size_t size);
int snd_hdac_refresh_widgets(struct hdac_device *codec);
int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev);
int snd_hdac_stream_set_params(struct hdac_stream *azx_dev,
unsigned int format_val);
-void snd_hdac_stream_start(struct hdac_stream *azx_dev, bool fresh_start);
+void snd_hdac_stream_start(struct hdac_stream *azx_dev);
void snd_hdac_stream_stop(struct hdac_stream *azx_dev);
void snd_hdac_stop_streams(struct hdac_bus *bus);
void snd_hdac_stop_streams_and_chip(struct hdac_bus *bus);
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