Merge tag 'driver-core-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core updates from Greg KH:
"Here is a small set of changes for 5.6-rc1 for the driver core and
some firmware subsystem changes.
Included in here are:
- device.h splitup like you asked for months ago
- devtmpfs minor cleanups
- firmware core minor changes
- debugfs fix for lockdown mode
- kernfs cleanup fix
- cpu topology minor fix
All of these have been in linux-next for a while with no reported
issues"
* tag 'driver-core-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (22 commits)
firmware: Rename FW_OPT_NOFALLBACK to FW_OPT_NOFALLBACK_SYSFS
devtmpfs: factor out common tail of devtmpfs_{create,delete}_node
devtmpfs: initify a bit
devtmpfs: simplify initialization of mount_dev
devtmpfs: factor out setup part of devtmpfsd()
devtmpfs: fix theoretical stale pointer deref in devtmpfsd()
driver core: platform: fix u32 greater or equal to zero comparison
cpu-topology: Don't error on more than CONFIG_NR_CPUS CPUs in device tree
debugfs: Return -EPERM when locked down
driver core: Print device when resources present in really_probe()
driver core: Fix test_async_driver_probe if NUMA is disabled
driver core: platform: Prevent resouce overflow from causing infinite loops
fs/kernfs/dir.c: Clean code by removing always true condition
component: do not dereference opaque pointer in debugfs
drivers/component: remove modular code
debugfs: Fix warnings when building documentation
device.h: move 'struct driver' stuff out to device/driver.h
device.h: move 'struct class' stuff out to device/class.h
device.h: move 'struct bus' stuff out to device/bus.h
device.h: move dev_printk()-like functions to dev_printk.h
...
diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c
index 1eb81f11..6119e11 100644
--- a/drivers/base/arch_topology.c
+++ b/drivers/base/arch_topology.c
@@ -248,6 +248,16 @@ core_initcall(free_raw_capacity);
#endif
#if defined(CONFIG_ARM64) || defined(CONFIG_RISCV)
+/*
+ * This function returns the logic cpu number of the node.
+ * There are basically three kinds of return values:
+ * (1) logic cpu number which is > 0.
+ * (2) -ENODEV when the device tree(DT) node is valid and found in the DT but
+ * there is no possible logical CPU in the kernel to match. This happens
+ * when CONFIG_NR_CPUS is configure to be smaller than the number of
+ * CPU nodes in DT. We need to just ignore this case.
+ * (3) -1 if the node does not exist in the device tree
+ */
static int __init get_cpu_for_node(struct device_node *node)
{
struct device_node *cpu_node;
@@ -261,7 +271,8 @@ static int __init get_cpu_for_node(struct device_node *node)
if (cpu >= 0)
topology_parse_cpu_capacity(cpu_node, cpu);
else
- pr_crit("Unable to find CPU node for %pOF\n", cpu_node);
+ pr_info("CPU node for %pOF exist but the possible cpu range is :%*pbl\n",
+ cpu_node, cpumask_pr_args(cpu_possible_mask));
of_node_put(cpu_node);
return cpu;
@@ -286,9 +297,8 @@ static int __init parse_core(struct device_node *core, int package_id,
cpu_topology[cpu].package_id = package_id;
cpu_topology[cpu].core_id = core_id;
cpu_topology[cpu].thread_id = i;
- } else {
- pr_err("%pOF: Can't get CPU for thread\n",
- t);
+ } else if (cpu != -ENODEV) {
+ pr_err("%pOF: Can't get CPU for thread\n", t);
of_node_put(t);
return -EINVAL;
}
@@ -307,7 +317,7 @@ static int __init parse_core(struct device_node *core, int package_id,
cpu_topology[cpu].package_id = package_id;
cpu_topology[cpu].core_id = core_id;
- } else if (leaf) {
+ } else if (leaf && cpu != -ENODEV) {
pr_err("%pOF: Can't get CPU for leaf core\n", core);
return -EINVAL;
}
diff --git a/drivers/base/base.h b/drivers/base/base.h
index 0d32544..40fb069 100644
--- a/drivers/base/base.h
+++ b/drivers/base/base.h
@@ -1,4 +1,15 @@
/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2001-2003 Patrick Mochel <mochel@osdl.org>
+ * Copyright (c) 2004-2009 Greg Kroah-Hartman <gregkh@suse.de>
+ * Copyright (c) 2008-2012 Novell Inc.
+ * Copyright (c) 2012-2019 Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+ * Copyright (c) 2012-2019 Linux Foundation
+ *
+ * Core driver model functions and structures that should not be
+ * shared outside of the drivers/base/ directory.
+ *
+ */
#include <linux/notifier.h>
/**
@@ -175,3 +186,11 @@ extern void device_links_unbind_consumers(struct device *dev);
/* device pm support */
void device_pm_move_to_tail(struct device *dev);
+
+#ifdef CONFIG_DEVTMPFS
+int devtmpfs_create_node(struct device *dev);
+int devtmpfs_delete_node(struct device *dev);
+#else
+static inline int devtmpfs_create_node(struct device *dev) { return 0; }
+static inline int devtmpfs_delete_node(struct device *dev) { return 0; }
+#endif
diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index a1d1e82..886e905 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -9,6 +9,7 @@
*/
#include <linux/async.h>
+#include <linux/device/bus.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/errno.h>
diff --git a/drivers/base/class.c b/drivers/base/class.c
index d8a6a58..bcd410e 100644
--- a/drivers/base/class.c
+++ b/drivers/base/class.c
@@ -8,6 +8,7 @@
* Copyright (c) 2003-2004 IBM Corp.
*/
+#include <linux/device/class.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/init.h>
diff --git a/drivers/base/component.c b/drivers/base/component.c
index 532a3a5..c7879f5 100644
--- a/drivers/base/component.c
+++ b/drivers/base/component.c
@@ -11,7 +11,6 @@
#include <linux/device.h>
#include <linux/kref.h>
#include <linux/list.h>
-#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/debugfs.h>
@@ -102,11 +101,11 @@ static int component_devices_show(struct seq_file *s, void *data)
seq_printf(s, "%-40s %20s\n", "device name", "status");
seq_puts(s, "-------------------------------------------------------------\n");
for (i = 0; i < match->num; i++) {
- struct device *d = (struct device *)match->compare[i].data;
+ struct component *component = match->compare[i].component;
- seq_printf(s, "%-40s %20s\n", dev_name(d),
- match->compare[i].component ?
- "registered" : "not registered");
+ seq_printf(s, "%-40s %20s\n",
+ component ? dev_name(component->dev) : "(unknown)",
+ component ? (component->bound ? "bound" : "not bound") : "not registered");
}
mutex_unlock(&component_mutex);
@@ -775,5 +774,3 @@ void component_del(struct device *dev, const struct component_ops *ops)
kfree(component);
}
EXPORT_SYMBOL_GPL(component_del);
-
-MODULE_LICENSE("GPL v2");
diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index d811e60..b25bcab 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -516,7 +516,10 @@ static int really_probe(struct device *dev, struct device_driver *drv)
atomic_inc(&probe_count);
pr_debug("bus: '%s': %s: probing driver %s with device %s\n",
drv->bus->name, __func__, drv->name, dev_name(dev));
- WARN_ON(!list_empty(&dev->devres_head));
+ if (!list_empty(&dev->devres_head)) {
+ dev_crit(dev, "Resources present before probing\n");
+ return -EBUSY;
+ }
re_probe:
dev->driver = drv;
diff --git a/drivers/base/devtmpfs.c b/drivers/base/devtmpfs.c
index 6cdbf15..5995c43 100644
--- a/drivers/base/devtmpfs.c
+++ b/drivers/base/devtmpfs.c
@@ -30,11 +30,7 @@
static struct task_struct *thread;
-#if defined CONFIG_DEVTMPFS_MOUNT
-static int mount_dev = 1;
-#else
-static int mount_dev;
-#endif
+static int __initdata mount_dev = IS_ENABLED(CONFIG_DEVTMPFS_MOUNT);
static DEFINE_SPINLOCK(req_lock);
@@ -93,6 +89,23 @@ static inline int is_blockdev(struct device *dev)
static inline int is_blockdev(struct device *dev) { return 0; }
#endif
+static int devtmpfs_submit_req(struct req *req, const char *tmp)
+{
+ init_completion(&req->done);
+
+ spin_lock(&req_lock);
+ req->next = requests;
+ requests = req;
+ spin_unlock(&req_lock);
+
+ wake_up_process(thread);
+ wait_for_completion(&req->done);
+
+ kfree(tmp);
+
+ return req->err;
+}
+
int devtmpfs_create_node(struct device *dev)
{
const char *tmp = NULL;
@@ -117,19 +130,7 @@ int devtmpfs_create_node(struct device *dev)
req.dev = dev;
- init_completion(&req.done);
-
- spin_lock(&req_lock);
- req.next = requests;
- requests = &req;
- spin_unlock(&req_lock);
-
- wake_up_process(thread);
- wait_for_completion(&req.done);
-
- kfree(tmp);
-
- return req.err;
+ return devtmpfs_submit_req(&req, tmp);
}
int devtmpfs_delete_node(struct device *dev)
@@ -147,18 +148,7 @@ int devtmpfs_delete_node(struct device *dev)
req.mode = 0;
req.dev = dev;
- init_completion(&req.done);
-
- spin_lock(&req_lock);
- req.next = requests;
- requests = &req;
- spin_unlock(&req_lock);
-
- wake_up_process(thread);
- wait_for_completion(&req.done);
-
- kfree(tmp);
- return req.err;
+ return devtmpfs_submit_req(&req, tmp);
}
static int dev_mkdir(const char *name, umode_t mode)
@@ -359,7 +349,7 @@ static int handle_remove(const char *nodename, struct device *dev)
* If configured, or requested by the commandline, devtmpfs will be
* auto-mounted after the kernel mounted the root filesystem.
*/
-int devtmpfs_mount(void)
+int __init devtmpfs_mount(void)
{
int err;
@@ -388,18 +378,30 @@ static int handle(const char *name, umode_t mode, kuid_t uid, kgid_t gid,
return handle_remove(name, dev);
}
-static int devtmpfsd(void *p)
+static int devtmpfs_setup(void *p)
{
- int *err = p;
- *err = ksys_unshare(CLONE_NEWNS);
- if (*err)
+ int err;
+
+ err = ksys_unshare(CLONE_NEWNS);
+ if (err)
goto out;
- *err = do_mount("devtmpfs", "/", "devtmpfs", MS_SILENT, NULL);
- if (*err)
+ err = do_mount("devtmpfs", "/", "devtmpfs", MS_SILENT, NULL);
+ if (err)
goto out;
ksys_chdir("/.."); /* will traverse into overmounted root */
ksys_chroot(".");
+out:
+ *(int *)p = err;
complete(&setup_done);
+ return err;
+}
+
+static int devtmpfsd(void *p)
+{
+ int err = devtmpfs_setup(p);
+
+ if (err)
+ return err;
while (1) {
spin_lock(&req_lock);
while (requests) {
@@ -420,9 +422,6 @@ static int devtmpfsd(void *p)
schedule();
}
return 0;
-out:
- complete(&setup_done);
- return *err;
}
/*
diff --git a/drivers/base/driver.c b/drivers/base/driver.c
index 4e5ca63..57c6876 100644
--- a/drivers/base/driver.c
+++ b/drivers/base/driver.c
@@ -8,6 +8,7 @@
* Copyright (c) 2007 Novell Inc.
*/
+#include <linux/device/driver.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/errno.h>
diff --git a/drivers/base/firmware_loader/fallback.c b/drivers/base/firmware_loader/fallback.c
index 62ee90b..8704e1b 100644
--- a/drivers/base/firmware_loader/fallback.c
+++ b/drivers/base/firmware_loader/fallback.c
@@ -606,7 +606,7 @@ static bool fw_run_sysfs_fallback(enum fw_opt opt_flags)
return false;
}
- if ((opt_flags & FW_OPT_NOFALLBACK))
+ if ((opt_flags & FW_OPT_NOFALLBACK_SYSFS))
return false;
/* Also permit LSMs and IMA to fail firmware sysfs fallback */
@@ -630,10 +630,11 @@ static bool fw_run_sysfs_fallback(enum fw_opt opt_flags)
* interface. Userspace is in charge of loading the firmware through the sysfs
* loading interface. This sysfs fallback mechanism may be disabled completely
* on a system by setting the proc sysctl value ignore_sysfs_fallback to true.
- * If this false we check if the internal API caller set the @FW_OPT_NOFALLBACK
- * flag, if so it would also disable the fallback mechanism. A system may want
- * to enfoce the sysfs fallback mechanism at all times, it can do this by
- * setting ignore_sysfs_fallback to false and force_sysfs_fallback to true.
+ * If this is false we check if the internal API caller set the
+ * @FW_OPT_NOFALLBACK_SYSFS flag, if so it would also disable the fallback
+ * mechanism. A system may want to enforce the sysfs fallback mechanism at all
+ * times, it can do this by setting ignore_sysfs_fallback to false and
+ * force_sysfs_fallback to true.
* Enabling force_sysfs_fallback is functionally equivalent to build a kernel
* with CONFIG_FW_LOADER_USER_HELPER_FALLBACK.
**/
diff --git a/drivers/base/firmware_loader/firmware.h b/drivers/base/firmware_loader/firmware.h
index 7ecd590..8656e52 100644
--- a/drivers/base/firmware_loader/firmware.h
+++ b/drivers/base/firmware_loader/firmware.h
@@ -27,16 +27,16 @@
* firmware file lookup on storage is avoided. Used for calls where the
* file may be too big, or where the driver takes charge of its own
* firmware caching mechanism.
- * @FW_OPT_NOFALLBACK: Disable the fallback mechanism. Takes precedence over
- * &FW_OPT_UEVENT and &FW_OPT_USERHELPER.
+ * @FW_OPT_NOFALLBACK_SYSFS: Disable the sysfs fallback mechanism. Takes
+ * precedence over &FW_OPT_UEVENT and &FW_OPT_USERHELPER.
*/
enum fw_opt {
- FW_OPT_UEVENT = BIT(0),
- FW_OPT_NOWAIT = BIT(1),
- FW_OPT_USERHELPER = BIT(2),
- FW_OPT_NO_WARN = BIT(3),
- FW_OPT_NOCACHE = BIT(4),
- FW_OPT_NOFALLBACK = BIT(5),
+ FW_OPT_UEVENT = BIT(0),
+ FW_OPT_NOWAIT = BIT(1),
+ FW_OPT_USERHELPER = BIT(2),
+ FW_OPT_NO_WARN = BIT(3),
+ FW_OPT_NOCACHE = BIT(4),
+ FW_OPT_NOFALLBACK_SYSFS = BIT(5),
};
enum fw_status {
diff --git a/drivers/base/firmware_loader/main.c b/drivers/base/firmware_loader/main.c
index 249add8..57133a9 100644
--- a/drivers/base/firmware_loader/main.c
+++ b/drivers/base/firmware_loader/main.c
@@ -877,7 +877,7 @@ int request_firmware_direct(const struct firmware **firmware_p,
__module_get(THIS_MODULE);
ret = _request_firmware(firmware_p, name, device, NULL, 0,
FW_OPT_UEVENT | FW_OPT_NO_WARN |
- FW_OPT_NOFALLBACK);
+ FW_OPT_NOFALLBACK_SYSFS);
module_put(THIS_MODULE);
return ret;
}
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index cf6b6b7..7fa654f 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -27,6 +27,7 @@
#include <linux/limits.h>
#include <linux/property.h>
#include <linux/kmemleak.h>
+#include <linux/types.h>
#include "base.h"
#include "power/power.h"
@@ -48,7 +49,7 @@ EXPORT_SYMBOL_GPL(platform_bus);
struct resource *platform_get_resource(struct platform_device *dev,
unsigned int type, unsigned int num)
{
- int i;
+ u32 i;
for (i = 0; i < dev->num_resources; i++) {
struct resource *r = &dev->resource[i];
@@ -255,7 +256,7 @@ struct resource *platform_get_resource_byname(struct platform_device *dev,
unsigned int type,
const char *name)
{
- int i;
+ u32 i;
for (i = 0; i < dev->num_resources; i++) {
struct resource *r = &dev->resource[i];
@@ -501,7 +502,8 @@ EXPORT_SYMBOL_GPL(platform_device_add_properties);
*/
int platform_device_add(struct platform_device *pdev)
{
- int i, ret;
+ u32 i;
+ int ret;
if (!pdev)
return -EINVAL;
@@ -569,7 +571,7 @@ int platform_device_add(struct platform_device *pdev)
pdev->id = PLATFORM_DEVID_AUTO;
}
- while (--i >= 0) {
+ while (i--) {
struct resource *r = &pdev->resource[i];
if (r->parent)
release_resource(r);
@@ -590,7 +592,7 @@ EXPORT_SYMBOL_GPL(platform_device_add);
*/
void platform_device_del(struct platform_device *pdev)
{
- int i;
+ u32 i;
if (!IS_ERR_OR_NULL(pdev)) {
device_del(&pdev->dev);
diff --git a/drivers/base/test/test_async_driver_probe.c b/drivers/base/test/test_async_driver_probe.c
index f4b1d8e..3bb7beb 100644
--- a/drivers/base/test/test_async_driver_probe.c
+++ b/drivers/base/test/test_async_driver_probe.c
@@ -44,7 +44,8 @@ static int test_probe(struct platform_device *pdev)
* performing an async init on that node.
*/
if (dev->driver->probe_type == PROBE_PREFER_ASYNCHRONOUS) {
- if (dev_to_node(dev) != numa_node_id()) {
+ if (IS_ENABLED(CONFIG_NUMA) &&
+ dev_to_node(dev) != numa_node_id()) {
dev_warn(dev, "NUMA node mismatch %d != %d\n",
dev_to_node(dev), numa_node_id());
atomic_inc(&warnings);
diff --git a/fs/debugfs/file.c b/fs/debugfs/file.c
index dede252..634b09d 100644
--- a/fs/debugfs/file.c
+++ b/fs/debugfs/file.c
@@ -142,18 +142,21 @@ EXPORT_SYMBOL_GPL(debugfs_file_put);
* We also need to exclude any file that has ways to write or alter it as root
* can bypass the permissions check.
*/
-static bool debugfs_is_locked_down(struct inode *inode,
- struct file *filp,
- const struct file_operations *real_fops)
+static int debugfs_locked_down(struct inode *inode,
+ struct file *filp,
+ const struct file_operations *real_fops)
{
if ((inode->i_mode & 07777) == 0444 &&
!(filp->f_mode & FMODE_WRITE) &&
!real_fops->unlocked_ioctl &&
!real_fops->compat_ioctl &&
!real_fops->mmap)
- return false;
+ return 0;
- return security_locked_down(LOCKDOWN_DEBUGFS);
+ if (security_locked_down(LOCKDOWN_DEBUGFS))
+ return -EPERM;
+
+ return 0;
}
static int open_proxy_open(struct inode *inode, struct file *filp)
@@ -168,7 +171,7 @@ static int open_proxy_open(struct inode *inode, struct file *filp)
real_fops = debugfs_real_fops(filp);
- r = debugfs_is_locked_down(inode, filp, real_fops);
+ r = debugfs_locked_down(inode, filp, real_fops);
if (r)
goto out;
@@ -298,7 +301,7 @@ static int full_proxy_open(struct inode *inode, struct file *filp)
real_fops = debugfs_real_fops(filp);
- r = debugfs_is_locked_down(inode, filp, real_fops);
+ r = debugfs_locked_down(inode, filp, real_fops);
if (r)
goto out;
@@ -496,10 +499,10 @@ DEFINE_DEBUGFS_ATTRIBUTE(fops_u32_wo, NULL, debugfs_u32_set, "%llu\n");
* This function will return a pointer to a dentry if it succeeds. This
* pointer must be passed to the debugfs_remove() function when the file is
* to be removed (no automatic cleanup happens if your module is unloaded,
- * you are responsible here.) If an error occurs, %ERR_PTR(-ERROR) will be
+ * you are responsible here.) If an error occurs, ERR_PTR(-ERROR) will be
* returned.
*
- * If debugfs is not enabled in the kernel, the value %ERR_PTR(-ENODEV) will
+ * If debugfs is not enabled in the kernel, the value ERR_PTR(-ENODEV) will
* be returned.
*/
struct dentry *debugfs_create_u32(const char *name, umode_t mode,
@@ -581,10 +584,10 @@ DEFINE_DEBUGFS_ATTRIBUTE(fops_ulong_wo, NULL, debugfs_ulong_set, "%llu\n");
* This function will return a pointer to a dentry if it succeeds. This
* pointer must be passed to the debugfs_remove() function when the file is
* to be removed (no automatic cleanup happens if your module is unloaded,
- * you are responsible here.) If an error occurs, %ERR_PTR(-ERROR) will be
+ * you are responsible here.) If an error occurs, ERR_PTR(-ERROR) will be
* returned.
*
- * If debugfs is not enabled in the kernel, the value %ERR_PTR(-ENODEV) will
+ * If debugfs is not enabled in the kernel, the value ERR_PTR(-ENODEV) will
* be returned.
*/
struct dentry *debugfs_create_ulong(const char *name, umode_t mode,
@@ -846,10 +849,10 @@ static const struct file_operations fops_bool_wo = {
* This function will return a pointer to a dentry if it succeeds. This
* pointer must be passed to the debugfs_remove() function when the file is
* to be removed (no automatic cleanup happens if your module is unloaded,
- * you are responsible here.) If an error occurs, %ERR_PTR(-ERROR) will be
+ * you are responsible here.) If an error occurs, ERR_PTR(-ERROR) will be
* returned.
*
- * If debugfs is not enabled in the kernel, the value %ERR_PTR(-ENODEV) will
+ * If debugfs is not enabled in the kernel, the value ERR_PTR(-ENODEV) will
* be returned.
*/
struct dentry *debugfs_create_bool(const char *name, umode_t mode,
@@ -899,10 +902,10 @@ static const struct file_operations fops_blob = {
* This function will return a pointer to a dentry if it succeeds. This
* pointer must be passed to the debugfs_remove() function when the file is
* to be removed (no automatic cleanup happens if your module is unloaded,
- * you are responsible here.) If an error occurs, %ERR_PTR(-ERROR) will be
+ * you are responsible here.) If an error occurs, ERR_PTR(-ERROR) will be
* returned.
*
- * If debugfs is not enabled in the kernel, the value %ERR_PTR(-ENODEV) will
+ * If debugfs is not enabled in the kernel, the value ERR_PTR(-ENODEV) will
* be returned.
*/
struct dentry *debugfs_create_blob(const char *name, umode_t mode,
@@ -1091,10 +1094,10 @@ static const struct file_operations fops_regset32 = {
* This function will return a pointer to a dentry if it succeeds. This
* pointer must be passed to the debugfs_remove() function when the file is
* to be removed (no automatic cleanup happens if your module is unloaded,
- * you are responsible here.) If an error occurs, %ERR_PTR(-ERROR) will be
+ * you are responsible here.) If an error occurs, ERR_PTR(-ERROR) will be
* returned.
*
- * If debugfs is not enabled in the kernel, the value %ERR_PTR(-ENODEV) will
+ * If debugfs is not enabled in the kernel, the value ERR_PTR(-ENODEV) will
* be returned.
*/
struct dentry *debugfs_create_regset32(const char *name, umode_t mode,
@@ -1158,4 +1161,3 @@ struct dentry *debugfs_create_devm_seqfile(struct device *dev, const char *name,
&debugfs_devm_entry_ops);
}
EXPORT_SYMBOL_GPL(debugfs_create_devm_seqfile);
-
diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index f4d8df5..dc6cffc 100644
--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@@ -423,7 +423,7 @@ static struct dentry *__debugfs_create_file(const char *name, umode_t mode,
* This function will return a pointer to a dentry if it succeeds. This
* pointer must be passed to the debugfs_remove() function when the file is
* to be removed (no automatic cleanup happens if your module is unloaded,
- * you are responsible here.) If an error occurs, %ERR_PTR(-ERROR) will be
+ * you are responsible here.) If an error occurs, ERR_PTR(-ERROR) will be
* returned.
*
* If debugfs is not enabled in the kernel, the value -%ENODEV will be
@@ -502,7 +502,7 @@ EXPORT_SYMBOL_GPL(debugfs_create_file_unsafe);
* This function will return a pointer to a dentry if it succeeds. This
* pointer must be passed to the debugfs_remove() function when the file is
* to be removed (no automatic cleanup happens if your module is unloaded,
- * you are responsible here.) If an error occurs, %ERR_PTR(-ERROR) will be
+ * you are responsible here.) If an error occurs, ERR_PTR(-ERROR) will be
* returned.
*
* If debugfs is not enabled in the kernel, the value -%ENODEV will be
@@ -534,7 +534,7 @@ EXPORT_SYMBOL_GPL(debugfs_create_file_size);
* This function will return a pointer to a dentry if it succeeds. This
* pointer must be passed to the debugfs_remove() function when the file is
* to be removed (no automatic cleanup happens if your module is unloaded,
- * you are responsible here.) If an error occurs, %ERR_PTR(-ERROR) will be
+ * you are responsible here.) If an error occurs, ERR_PTR(-ERROR) will be
* returned.
*
* If debugfs is not enabled in the kernel, the value -%ENODEV will be
@@ -627,7 +627,7 @@ EXPORT_SYMBOL(debugfs_create_automount);
* This function will return a pointer to a dentry if it succeeds. This
* pointer must be passed to the debugfs_remove() function when the symbolic
* link is to be removed (no automatic cleanup happens if your module is
- * unloaded, you are responsible here.) If an error occurs, %ERR_PTR(-ERROR)
+ * unloaded, you are responsible here.) If an error occurs, ERR_PTR(-ERROR)
* will be returned.
*
* If debugfs is not enabled in the kernel, the value -%ENODEV will be
@@ -906,4 +906,3 @@ static int __init debugfs_init(void)
return retval;
}
core_initcall(debugfs_init);
-
diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c
index 9d96e68..9aec80b 100644
--- a/fs/kernfs/dir.c
+++ b/fs/kernfs/dir.c
@@ -1266,7 +1266,7 @@ void kernfs_activate(struct kernfs_node *kn)
pos = NULL;
while ((pos = kernfs_next_descendant_post(pos, kn))) {
- if (!pos || (pos->flags & KERNFS_ACTIVATED))
+ if (pos->flags & KERNFS_ACTIVATED)
continue;
WARN_ON_ONCE(pos->parent && RB_EMPTY_NODE(&pos->rb));
diff --git a/include/linux/dev_printk.h b/include/linux/dev_printk.h
new file mode 100644
index 0000000..5aad06b
--- /dev/null
+++ b/include/linux/dev_printk.h
@@ -0,0 +1,235 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * dev_printk.h - printk messages helpers for devices
+ *
+ * Copyright (c) 2001-2003 Patrick Mochel <mochel@osdl.org>
+ * Copyright (c) 2004-2009 Greg Kroah-Hartman <gregkh@suse.de>
+ * Copyright (c) 2008-2009 Novell Inc.
+ *
+ */
+
+#ifndef _DEVICE_PRINTK_H_
+#define _DEVICE_PRINTK_H_
+
+#include <linux/compiler.h>
+#include <linux/types.h>
+#include <linux/ratelimit.h>
+
+#ifndef dev_fmt
+#define dev_fmt(fmt) fmt
+#endif
+
+struct device;
+
+#ifdef CONFIG_PRINTK
+
+__printf(3, 0) __cold
+int dev_vprintk_emit(int level, const struct device *dev,
+ const char *fmt, va_list args);
+__printf(3, 4) __cold
+int dev_printk_emit(int level, const struct device *dev, const char *fmt, ...);
+
+__printf(3, 4) __cold
+void dev_printk(const char *level, const struct device *dev,
+ const char *fmt, ...);
+__printf(2, 3) __cold
+void _dev_emerg(const struct device *dev, const char *fmt, ...);
+__printf(2, 3) __cold
+void _dev_alert(const struct device *dev, const char *fmt, ...);
+__printf(2, 3) __cold
+void _dev_crit(const struct device *dev, const char *fmt, ...);
+__printf(2, 3) __cold
+void _dev_err(const struct device *dev, const char *fmt, ...);
+__printf(2, 3) __cold
+void _dev_warn(const struct device *dev, const char *fmt, ...);
+__printf(2, 3) __cold
+void _dev_notice(const struct device *dev, const char *fmt, ...);
+__printf(2, 3) __cold
+void _dev_info(const struct device *dev, const char *fmt, ...);
+
+#else
+
+static inline __printf(3, 0)
+int dev_vprintk_emit(int level, const struct device *dev,
+ const char *fmt, va_list args)
+{ return 0; }
+static inline __printf(3, 4)
+int dev_printk_emit(int level, const struct device *dev, const char *fmt, ...)
+{ return 0; }
+
+static inline void __dev_printk(const char *level, const struct device *dev,
+ struct va_format *vaf)
+{}
+static inline __printf(3, 4)
+void dev_printk(const char *level, const struct device *dev,
+ const char *fmt, ...)
+{}
+
+static inline __printf(2, 3)
+void _dev_emerg(const struct device *dev, const char *fmt, ...)
+{}
+static inline __printf(2, 3)
+void _dev_crit(const struct device *dev, const char *fmt, ...)
+{}
+static inline __printf(2, 3)
+void _dev_alert(const struct device *dev, const char *fmt, ...)
+{}
+static inline __printf(2, 3)
+void _dev_err(const struct device *dev, const char *fmt, ...)
+{}
+static inline __printf(2, 3)
+void _dev_warn(const struct device *dev, const char *fmt, ...)
+{}
+static inline __printf(2, 3)
+void _dev_notice(const struct device *dev, const char *fmt, ...)
+{}
+static inline __printf(2, 3)
+void _dev_info(const struct device *dev, const char *fmt, ...)
+{}
+
+#endif
+
+/*
+ * #defines for all the dev_<level> macros to prefix with whatever
+ * possible use of #define dev_fmt(fmt) ...
+ */
+
+#define dev_emerg(dev, fmt, ...) \
+ _dev_emerg(dev, dev_fmt(fmt), ##__VA_ARGS__)
+#define dev_crit(dev, fmt, ...) \
+ _dev_crit(dev, dev_fmt(fmt), ##__VA_ARGS__)
+#define dev_alert(dev, fmt, ...) \
+ _dev_alert(dev, dev_fmt(fmt), ##__VA_ARGS__)
+#define dev_err(dev, fmt, ...) \
+ _dev_err(dev, dev_fmt(fmt), ##__VA_ARGS__)
+#define dev_warn(dev, fmt, ...) \
+ _dev_warn(dev, dev_fmt(fmt), ##__VA_ARGS__)
+#define dev_notice(dev, fmt, ...) \
+ _dev_notice(dev, dev_fmt(fmt), ##__VA_ARGS__)
+#define dev_info(dev, fmt, ...) \
+ _dev_info(dev, dev_fmt(fmt), ##__VA_ARGS__)
+
+#if defined(CONFIG_DYNAMIC_DEBUG)
+#define dev_dbg(dev, fmt, ...) \
+ dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
+#elif defined(DEBUG)
+#define dev_dbg(dev, fmt, ...) \
+ dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__)
+#else
+#define dev_dbg(dev, fmt, ...) \
+({ \
+ if (0) \
+ dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
+})
+#endif
+
+#ifdef CONFIG_PRINTK
+#define dev_level_once(dev_level, dev, fmt, ...) \
+do { \
+ static bool __print_once __read_mostly; \
+ \
+ if (!__print_once) { \
+ __print_once = true; \
+ dev_level(dev, fmt, ##__VA_ARGS__); \
+ } \
+} while (0)
+#else
+#define dev_level_once(dev_level, dev, fmt, ...) \
+do { \
+ if (0) \
+ dev_level(dev, fmt, ##__VA_ARGS__); \
+} while (0)
+#endif
+
+#define dev_emerg_once(dev, fmt, ...) \
+ dev_level_once(dev_emerg, dev, fmt, ##__VA_ARGS__)
+#define dev_alert_once(dev, fmt, ...) \
+ dev_level_once(dev_alert, dev, fmt, ##__VA_ARGS__)
+#define dev_crit_once(dev, fmt, ...) \
+ dev_level_once(dev_crit, dev, fmt, ##__VA_ARGS__)
+#define dev_err_once(dev, fmt, ...) \
+ dev_level_once(dev_err, dev, fmt, ##__VA_ARGS__)
+#define dev_warn_once(dev, fmt, ...) \
+ dev_level_once(dev_warn, dev, fmt, ##__VA_ARGS__)
+#define dev_notice_once(dev, fmt, ...) \
+ dev_level_once(dev_notice, dev, fmt, ##__VA_ARGS__)
+#define dev_info_once(dev, fmt, ...) \
+ dev_level_once(dev_info, dev, fmt, ##__VA_ARGS__)
+#define dev_dbg_once(dev, fmt, ...) \
+ dev_level_once(dev_dbg, dev, fmt, ##__VA_ARGS__)
+
+#define dev_level_ratelimited(dev_level, dev, fmt, ...) \
+do { \
+ static DEFINE_RATELIMIT_STATE(_rs, \
+ DEFAULT_RATELIMIT_INTERVAL, \
+ DEFAULT_RATELIMIT_BURST); \
+ if (__ratelimit(&_rs)) \
+ dev_level(dev, fmt, ##__VA_ARGS__); \
+} while (0)
+
+#define dev_emerg_ratelimited(dev, fmt, ...) \
+ dev_level_ratelimited(dev_emerg, dev, fmt, ##__VA_ARGS__)
+#define dev_alert_ratelimited(dev, fmt, ...) \
+ dev_level_ratelimited(dev_alert, dev, fmt, ##__VA_ARGS__)
+#define dev_crit_ratelimited(dev, fmt, ...) \
+ dev_level_ratelimited(dev_crit, dev, fmt, ##__VA_ARGS__)
+#define dev_err_ratelimited(dev, fmt, ...) \
+ dev_level_ratelimited(dev_err, dev, fmt, ##__VA_ARGS__)
+#define dev_warn_ratelimited(dev, fmt, ...) \
+ dev_level_ratelimited(dev_warn, dev, fmt, ##__VA_ARGS__)
+#define dev_notice_ratelimited(dev, fmt, ...) \
+ dev_level_ratelimited(dev_notice, dev, fmt, ##__VA_ARGS__)
+#define dev_info_ratelimited(dev, fmt, ...) \
+ dev_level_ratelimited(dev_info, dev, fmt, ##__VA_ARGS__)
+#if defined(CONFIG_DYNAMIC_DEBUG)
+/* descriptor check is first to prevent flooding with "callbacks suppressed" */
+#define dev_dbg_ratelimited(dev, fmt, ...) \
+do { \
+ static DEFINE_RATELIMIT_STATE(_rs, \
+ DEFAULT_RATELIMIT_INTERVAL, \
+ DEFAULT_RATELIMIT_BURST); \
+ DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
+ if (DYNAMIC_DEBUG_BRANCH(descriptor) && \
+ __ratelimit(&_rs)) \
+ __dynamic_dev_dbg(&descriptor, dev, dev_fmt(fmt), \
+ ##__VA_ARGS__); \
+} while (0)
+#elif defined(DEBUG)
+#define dev_dbg_ratelimited(dev, fmt, ...) \
+do { \
+ static DEFINE_RATELIMIT_STATE(_rs, \
+ DEFAULT_RATELIMIT_INTERVAL, \
+ DEFAULT_RATELIMIT_BURST); \
+ if (__ratelimit(&_rs)) \
+ dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
+} while (0)
+#else
+#define dev_dbg_ratelimited(dev, fmt, ...) \
+do { \
+ if (0) \
+ dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
+} while (0)
+#endif
+
+#ifdef VERBOSE_DEBUG
+#define dev_vdbg dev_dbg
+#else
+#define dev_vdbg(dev, fmt, ...) \
+({ \
+ if (0) \
+ dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
+})
+#endif
+
+/*
+ * dev_WARN*() acts like dev_printk(), but with the key difference of
+ * using WARN/WARN_ONCE to include file/line information and a backtrace.
+ */
+#define dev_WARN(dev, format, arg...) \
+ WARN(1, "%s %s: " format, dev_driver_string(dev), dev_name(dev), ## arg);
+
+#define dev_WARN_ONCE(dev, condition, format, arg...) \
+ WARN_ONCE(condition, "%s %s: " format, \
+ dev_driver_string(dev), dev_name(dev), ## arg)
+
+#endif /* _DEVICE_PRINTK_H_ */
diff --git a/include/linux/device.h b/include/linux/device.h
index 96ff767..0cd7c64 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -12,6 +12,7 @@
#ifndef _DEVICE_H_
#define _DEVICE_H_
+#include <linux/dev_printk.h>
#include <linux/ioport.h>
#include <linux/kobject.h>
#include <linux/klist.h>
@@ -22,10 +23,12 @@
#include <linux/mutex.h>
#include <linux/pm.h>
#include <linux/atomic.h>
-#include <linux/ratelimit.h>
#include <linux/uidgid.h>
#include <linux/gfp.h>
#include <linux/overflow.h>
+#include <linux/device/bus.h>
+#include <linux/device/class.h>
+#include <linux/device/driver.h>
#include <asm/device.h>
struct device;
@@ -35,7 +38,6 @@ struct driver_private;
struct module;
struct class;
struct subsys_private;
-struct bus_type;
struct device_node;
struct fwnode_handle;
struct iommu_ops;
@@ -44,490 +46,6 @@ struct iommu_fwspec;
struct dev_pin_info;
struct iommu_param;
-struct bus_attribute {
- struct attribute attr;
- ssize_t (*show)(struct bus_type *bus, char *buf);
- ssize_t (*store)(struct bus_type *bus, const char *buf, size_t count);
-};
-
-#define BUS_ATTR_RW(_name) \
- struct bus_attribute bus_attr_##_name = __ATTR_RW(_name)
-#define BUS_ATTR_RO(_name) \
- struct bus_attribute bus_attr_##_name = __ATTR_RO(_name)
-#define BUS_ATTR_WO(_name) \
- struct bus_attribute bus_attr_##_name = __ATTR_WO(_name)
-
-extern int __must_check bus_create_file(struct bus_type *,
- struct bus_attribute *);
-extern void bus_remove_file(struct bus_type *, struct bus_attribute *);
-
-/**
- * struct bus_type - The bus type of the device
- *
- * @name: The name of the bus.
- * @dev_name: Used for subsystems to enumerate devices like ("foo%u", dev->id).
- * @dev_root: Default device to use as the parent.
- * @bus_groups: Default attributes of the bus.
- * @dev_groups: Default attributes of the devices on the bus.
- * @drv_groups: Default attributes of the device drivers on the bus.
- * @match: Called, perhaps multiple times, whenever a new device or driver
- * is added for this bus. It should return a positive value if the
- * given device can be handled by the given driver and zero
- * otherwise. It may also return error code if determining that
- * the driver supports the device is not possible. In case of
- * -EPROBE_DEFER it will queue the device for deferred probing.
- * @uevent: Called when a device is added, removed, or a few other things
- * that generate uevents to add the environment variables.
- * @probe: Called when a new device or driver add to this bus, and callback
- * the specific driver's probe to initial the matched device.
- * @sync_state: Called to sync device state to software state after all the
- * state tracking consumers linked to this device (present at
- * the time of late_initcall) have successfully bound to a
- * driver. If the device has no consumers, this function will
- * be called at late_initcall_sync level. If the device has
- * consumers that are never bound to a driver, this function
- * will never get called until they do.
- * @remove: Called when a device removed from this bus.
- * @shutdown: Called at shut-down time to quiesce the device.
- *
- * @online: Called to put the device back online (after offlining it).
- * @offline: Called to put the device offline for hot-removal. May fail.
- *
- * @suspend: Called when a device on this bus wants to go to sleep mode.
- * @resume: Called to bring a device on this bus out of sleep mode.
- * @num_vf: Called to find out how many virtual functions a device on this
- * bus supports.
- * @dma_configure: Called to setup DMA configuration on a device on
- * this bus.
- * @pm: Power management operations of this bus, callback the specific
- * device driver's pm-ops.
- * @iommu_ops: IOMMU specific operations for this bus, used to attach IOMMU
- * driver implementations to a bus and allow the driver to do
- * bus-specific setup
- * @p: The private data of the driver core, only the driver core can
- * touch this.
- * @lock_key: Lock class key for use by the lock validator
- * @need_parent_lock: When probing or removing a device on this bus, the
- * device core should lock the device's parent.
- *
- * A bus is a channel between the processor and one or more devices. For the
- * purposes of the device model, all devices are connected via a bus, even if
- * it is an internal, virtual, "platform" bus. Buses can plug into each other.
- * A USB controller is usually a PCI device, for example. The device model
- * represents the actual connections between buses and the devices they control.
- * A bus is represented by the bus_type structure. It contains the name, the
- * default attributes, the bus' methods, PM operations, and the driver core's
- * private data.
- */
-struct bus_type {
- const char *name;
- const char *dev_name;
- struct device *dev_root;
- const struct attribute_group **bus_groups;
- const struct attribute_group **dev_groups;
- const struct attribute_group **drv_groups;
-
- int (*match)(struct device *dev, struct device_driver *drv);
- int (*uevent)(struct device *dev, struct kobj_uevent_env *env);
- int (*probe)(struct device *dev);
- void (*sync_state)(struct device *dev);
- int (*remove)(struct device *dev);
- void (*shutdown)(struct device *dev);
-
- int (*online)(struct device *dev);
- int (*offline)(struct device *dev);
-
- int (*suspend)(struct device *dev, pm_message_t state);
- int (*resume)(struct device *dev);
-
- int (*num_vf)(struct device *dev);
-
- int (*dma_configure)(struct device *dev);
-
- const struct dev_pm_ops *pm;
-
- const struct iommu_ops *iommu_ops;
-
- struct subsys_private *p;
- struct lock_class_key lock_key;
-
- bool need_parent_lock;
-};
-
-extern int __must_check bus_register(struct bus_type *bus);
-
-extern void bus_unregister(struct bus_type *bus);
-
-extern int __must_check bus_rescan_devices(struct bus_type *bus);
-
-/* iterator helpers for buses */
-struct subsys_dev_iter {
- struct klist_iter ki;
- const struct device_type *type;
-};
-void subsys_dev_iter_init(struct subsys_dev_iter *iter,
- struct bus_type *subsys,
- struct device *start,
- const struct device_type *type);
-struct device *subsys_dev_iter_next(struct subsys_dev_iter *iter);
-void subsys_dev_iter_exit(struct subsys_dev_iter *iter);
-
-int device_match_name(struct device *dev, const void *name);
-int device_match_of_node(struct device *dev, const void *np);
-int device_match_fwnode(struct device *dev, const void *fwnode);
-int device_match_devt(struct device *dev, const void *pdevt);
-int device_match_acpi_dev(struct device *dev, const void *adev);
-int device_match_any(struct device *dev, const void *unused);
-
-int bus_for_each_dev(struct bus_type *bus, struct device *start, void *data,
- int (*fn)(struct device *dev, void *data));
-struct device *bus_find_device(struct bus_type *bus, struct device *start,
- const void *data,
- int (*match)(struct device *dev, const void *data));
-/**
- * bus_find_device_by_name - device iterator for locating a particular device
- * of a specific name.
- * @bus: bus type
- * @start: Device to begin with
- * @name: name of the device to match
- */
-static inline struct device *bus_find_device_by_name(struct bus_type *bus,
- struct device *start,
- const char *name)
-{
- return bus_find_device(bus, start, name, device_match_name);
-}
-
-/**
- * bus_find_device_by_of_node : device iterator for locating a particular device
- * matching the of_node.
- * @bus: bus type
- * @np: of_node of the device to match.
- */
-static inline struct device *
-bus_find_device_by_of_node(struct bus_type *bus, const struct device_node *np)
-{
- return bus_find_device(bus, NULL, np, device_match_of_node);
-}
-
-/**
- * bus_find_device_by_fwnode : device iterator for locating a particular device
- * matching the fwnode.
- * @bus: bus type
- * @fwnode: fwnode of the device to match.
- */
-static inline struct device *
-bus_find_device_by_fwnode(struct bus_type *bus, const struct fwnode_handle *fwnode)
-{
- return bus_find_device(bus, NULL, fwnode, device_match_fwnode);
-}
-
-/**
- * bus_find_device_by_devt : device iterator for locating a particular device
- * matching the device type.
- * @bus: bus type
- * @devt: device type of the device to match.
- */
-static inline struct device *bus_find_device_by_devt(struct bus_type *bus,
- dev_t devt)
-{
- return bus_find_device(bus, NULL, &devt, device_match_devt);
-}
-
-/**
- * bus_find_next_device - Find the next device after a given device in a
- * given bus.
- * @bus: bus type
- * @cur: device to begin the search with.
- */
-static inline struct device *
-bus_find_next_device(struct bus_type *bus,struct device *cur)
-{
- return bus_find_device(bus, cur, NULL, device_match_any);
-}
-
-#ifdef CONFIG_ACPI
-struct acpi_device;
-
-/**
- * bus_find_device_by_acpi_dev : device iterator for locating a particular device
- * matching the ACPI COMPANION device.
- * @bus: bus type
- * @adev: ACPI COMPANION device to match.
- */
-static inline struct device *
-bus_find_device_by_acpi_dev(struct bus_type *bus, const struct acpi_device *adev)
-{
- return bus_find_device(bus, NULL, adev, device_match_acpi_dev);
-}
-#else
-static inline struct device *
-bus_find_device_by_acpi_dev(struct bus_type *bus, const void *adev)
-{
- return NULL;
-}
-#endif
-
-struct device *subsys_find_device_by_id(struct bus_type *bus, unsigned int id,
- struct device *hint);
-int bus_for_each_drv(struct bus_type *bus, struct device_driver *start,
- void *data, int (*fn)(struct device_driver *, void *));
-void bus_sort_breadthfirst(struct bus_type *bus,
- int (*compare)(const struct device *a,
- const struct device *b));
-/*
- * Bus notifiers: Get notified of addition/removal of devices
- * and binding/unbinding of drivers to devices.
- * In the long run, it should be a replacement for the platform
- * notify hooks.
- */
-struct notifier_block;
-
-extern int bus_register_notifier(struct bus_type *bus,
- struct notifier_block *nb);
-extern int bus_unregister_notifier(struct bus_type *bus,
- struct notifier_block *nb);
-
-/* All 4 notifers below get called with the target struct device *
- * as an argument. Note that those functions are likely to be called
- * with the device lock held in the core, so be careful.
- */
-#define BUS_NOTIFY_ADD_DEVICE 0x00000001 /* device added */
-#define BUS_NOTIFY_DEL_DEVICE 0x00000002 /* device to be removed */
-#define BUS_NOTIFY_REMOVED_DEVICE 0x00000003 /* device removed */
-#define BUS_NOTIFY_BIND_DRIVER 0x00000004 /* driver about to be
- bound */
-#define BUS_NOTIFY_BOUND_DRIVER 0x00000005 /* driver bound to device */
-#define BUS_NOTIFY_UNBIND_DRIVER 0x00000006 /* driver about to be
- unbound */
-#define BUS_NOTIFY_UNBOUND_DRIVER 0x00000007 /* driver is unbound
- from the device */
-#define BUS_NOTIFY_DRIVER_NOT_BOUND 0x00000008 /* driver fails to be bound */
-
-extern struct kset *bus_get_kset(struct bus_type *bus);
-extern struct klist *bus_get_device_klist(struct bus_type *bus);
-
-/**
- * enum probe_type - device driver probe type to try
- * Device drivers may opt in for special handling of their
- * respective probe routines. This tells the core what to
- * expect and prefer.
- *
- * @PROBE_DEFAULT_STRATEGY: Used by drivers that work equally well
- * whether probed synchronously or asynchronously.
- * @PROBE_PREFER_ASYNCHRONOUS: Drivers for "slow" devices which
- * probing order is not essential for booting the system may
- * opt into executing their probes asynchronously.
- * @PROBE_FORCE_SYNCHRONOUS: Use this to annotate drivers that need
- * their probe routines to run synchronously with driver and
- * device registration (with the exception of -EPROBE_DEFER
- * handling - re-probing always ends up being done asynchronously).
- *
- * Note that the end goal is to switch the kernel to use asynchronous
- * probing by default, so annotating drivers with
- * %PROBE_PREFER_ASYNCHRONOUS is a temporary measure that allows us
- * to speed up boot process while we are validating the rest of the
- * drivers.
- */
-enum probe_type {
- PROBE_DEFAULT_STRATEGY,
- PROBE_PREFER_ASYNCHRONOUS,
- PROBE_FORCE_SYNCHRONOUS,
-};
-
-/**
- * struct device_driver - The basic device driver structure
- * @name: Name of the device driver.
- * @bus: The bus which the device of this driver belongs to.
- * @owner: The module owner.
- * @mod_name: Used for built-in modules.
- * @suppress_bind_attrs: Disables bind/unbind via sysfs.
- * @probe_type: Type of the probe (synchronous or asynchronous) to use.
- * @of_match_table: The open firmware table.
- * @acpi_match_table: The ACPI match table.
- * @probe: Called to query the existence of a specific device,
- * whether this driver can work with it, and bind the driver
- * to a specific device.
- * @sync_state: Called to sync device state to software state after all the
- * state tracking consumers linked to this device (present at
- * the time of late_initcall) have successfully bound to a
- * driver. If the device has no consumers, this function will
- * be called at late_initcall_sync level. If the device has
- * consumers that are never bound to a driver, this function
- * will never get called until they do.
- * @remove: Called when the device is removed from the system to
- * unbind a device from this driver.
- * @shutdown: Called at shut-down time to quiesce the device.
- * @suspend: Called to put the device to sleep mode. Usually to a
- * low power state.
- * @resume: Called to bring a device from sleep mode.
- * @groups: Default attributes that get created by the driver core
- * automatically.
- * @dev_groups: Additional attributes attached to device instance once the
- * it is bound to the driver.
- * @pm: Power management operations of the device which matched
- * this driver.
- * @coredump: Called when sysfs entry is written to. The device driver
- * is expected to call the dev_coredump API resulting in a
- * uevent.
- * @p: Driver core's private data, no one other than the driver
- * core can touch this.
- *
- * The device driver-model tracks all of the drivers known to the system.
- * The main reason for this tracking is to enable the driver core to match
- * up drivers with new devices. Once drivers are known objects within the
- * system, however, a number of other things become possible. Device drivers
- * can export information and configuration variables that are independent
- * of any specific device.
- */
-struct device_driver {
- const char *name;
- struct bus_type *bus;
-
- struct module *owner;
- const char *mod_name; /* used for built-in modules */
-
- bool suppress_bind_attrs; /* disables bind/unbind via sysfs */
- enum probe_type probe_type;
-
- const struct of_device_id *of_match_table;
- const struct acpi_device_id *acpi_match_table;
-
- int (*probe) (struct device *dev);
- void (*sync_state)(struct device *dev);
- int (*remove) (struct device *dev);
- void (*shutdown) (struct device *dev);
- int (*suspend) (struct device *dev, pm_message_t state);
- int (*resume) (struct device *dev);
- const struct attribute_group **groups;
- const struct attribute_group **dev_groups;
-
- const struct dev_pm_ops *pm;
- void (*coredump) (struct device *dev);
-
- struct driver_private *p;
-};
-
-
-extern int __must_check driver_register(struct device_driver *drv);
-extern void driver_unregister(struct device_driver *drv);
-
-extern struct device_driver *driver_find(const char *name,
- struct bus_type *bus);
-extern int driver_probe_done(void);
-extern void wait_for_device_probe(void);
-
-/* sysfs interface for exporting driver attributes */
-
-struct driver_attribute {
- struct attribute attr;
- ssize_t (*show)(struct device_driver *driver, char *buf);
- ssize_t (*store)(struct device_driver *driver, const char *buf,
- size_t count);
-};
-
-#define DRIVER_ATTR_RW(_name) \
- struct driver_attribute driver_attr_##_name = __ATTR_RW(_name)
-#define DRIVER_ATTR_RO(_name) \
- struct driver_attribute driver_attr_##_name = __ATTR_RO(_name)
-#define DRIVER_ATTR_WO(_name) \
- struct driver_attribute driver_attr_##_name = __ATTR_WO(_name)
-
-extern int __must_check driver_create_file(struct device_driver *driver,
- const struct driver_attribute *attr);
-extern void driver_remove_file(struct device_driver *driver,
- const struct driver_attribute *attr);
-
-extern int __must_check driver_for_each_device(struct device_driver *drv,
- struct device *start,
- void *data,
- int (*fn)(struct device *dev,
- void *));
-struct device *driver_find_device(struct device_driver *drv,
- struct device *start, const void *data,
- int (*match)(struct device *dev, const void *data));
-
-/**
- * driver_find_device_by_name - device iterator for locating a particular device
- * of a specific name.
- * @drv: the driver we're iterating
- * @name: name of the device to match
- */
-static inline struct device *driver_find_device_by_name(struct device_driver *drv,
- const char *name)
-{
- return driver_find_device(drv, NULL, name, device_match_name);
-}
-
-/**
- * driver_find_device_by_of_node- device iterator for locating a particular device
- * by of_node pointer.
- * @drv: the driver we're iterating
- * @np: of_node pointer to match.
- */
-static inline struct device *
-driver_find_device_by_of_node(struct device_driver *drv,
- const struct device_node *np)
-{
- return driver_find_device(drv, NULL, np, device_match_of_node);
-}
-
-/**
- * driver_find_device_by_fwnode- device iterator for locating a particular device
- * by fwnode pointer.
- * @drv: the driver we're iterating
- * @fwnode: fwnode pointer to match.
- */
-static inline struct device *
-driver_find_device_by_fwnode(struct device_driver *drv,
- const struct fwnode_handle *fwnode)
-{
- return driver_find_device(drv, NULL, fwnode, device_match_fwnode);
-}
-
-/**
- * driver_find_device_by_devt- device iterator for locating a particular device
- * by devt.
- * @drv: the driver we're iterating
- * @devt: devt pointer to match.
- */
-static inline struct device *driver_find_device_by_devt(struct device_driver *drv,
- dev_t devt)
-{
- return driver_find_device(drv, NULL, &devt, device_match_devt);
-}
-
-static inline struct device *driver_find_next_device(struct device_driver *drv,
- struct device *start)
-{
- return driver_find_device(drv, start, NULL, device_match_any);
-}
-
-#ifdef CONFIG_ACPI
-/**
- * driver_find_device_by_acpi_dev : device iterator for locating a particular
- * device matching the ACPI_COMPANION device.
- * @drv: the driver we're iterating
- * @adev: ACPI_COMPANION device to match.
- */
-static inline struct device *
-driver_find_device_by_acpi_dev(struct device_driver *drv,
- const struct acpi_device *adev)
-{
- return driver_find_device(drv, NULL, adev, device_match_acpi_dev);
-}
-#else
-static inline struct device *
-driver_find_device_by_acpi_dev(struct device_driver *drv, const void *adev)
-{
- return NULL;
-}
-#endif
-
-void driver_deferred_probe_add(struct device *dev);
-int driver_deferred_probe_check_state(struct device *dev);
-int driver_deferred_probe_check_state_continue(struct device *dev);
-
/**
* struct subsys_interface - interfaces to device functions
* @name: name of the device function
@@ -557,246 +75,6 @@ int subsys_system_register(struct bus_type *subsys,
int subsys_virtual_register(struct bus_type *subsys,
const struct attribute_group **groups);
-/**
- * struct class - device classes
- * @name: Name of the class.
- * @owner: The module owner.
- * @class_groups: Default attributes of this class.
- * @dev_groups: Default attributes of the devices that belong to the class.
- * @dev_kobj: The kobject that represents this class and links it into the hierarchy.
- * @dev_uevent: Called when a device is added, removed from this class, or a
- * few other things that generate uevents to add the environment
- * variables.
- * @devnode: Callback to provide the devtmpfs.
- * @class_release: Called to release this class.
- * @dev_release: Called to release the device.
- * @shutdown_pre: Called at shut-down time before driver shutdown.
- * @ns_type: Callbacks so sysfs can detemine namespaces.
- * @namespace: Namespace of the device belongs to this class.
- * @get_ownership: Allows class to specify uid/gid of the sysfs directories
- * for the devices belonging to the class. Usually tied to
- * device's namespace.
- * @pm: The default device power management operations of this class.
- * @p: The private data of the driver core, no one other than the
- * driver core can touch this.
- *
- * A class is a higher-level view of a device that abstracts out low-level
- * implementation details. Drivers may see a SCSI disk or an ATA disk, but,
- * at the class level, they are all simply disks. Classes allow user space
- * to work with devices based on what they do, rather than how they are
- * connected or how they work.
- */
-struct class {
- const char *name;
- struct module *owner;
-
- const struct attribute_group **class_groups;
- const struct attribute_group **dev_groups;
- struct kobject *dev_kobj;
-
- int (*dev_uevent)(struct device *dev, struct kobj_uevent_env *env);
- char *(*devnode)(struct device *dev, umode_t *mode);
-
- void (*class_release)(struct class *class);
- void (*dev_release)(struct device *dev);
-
- int (*shutdown_pre)(struct device *dev);
-
- const struct kobj_ns_type_operations *ns_type;
- const void *(*namespace)(struct device *dev);
-
- void (*get_ownership)(struct device *dev, kuid_t *uid, kgid_t *gid);
-
- const struct dev_pm_ops *pm;
-
- struct subsys_private *p;
-};
-
-struct class_dev_iter {
- struct klist_iter ki;
- const struct device_type *type;
-};
-
-extern struct kobject *sysfs_dev_block_kobj;
-extern struct kobject *sysfs_dev_char_kobj;
-extern int __must_check __class_register(struct class *class,
- struct lock_class_key *key);
-extern void class_unregister(struct class *class);
-
-/* This is a #define to keep the compiler from merging different
- * instances of the __key variable */
-#define class_register(class) \
-({ \
- static struct lock_class_key __key; \
- __class_register(class, &__key); \
-})
-
-struct class_compat;
-struct class_compat *class_compat_register(const char *name);
-void class_compat_unregister(struct class_compat *cls);
-int class_compat_create_link(struct class_compat *cls, struct device *dev,
- struct device *device_link);
-void class_compat_remove_link(struct class_compat *cls, struct device *dev,
- struct device *device_link);
-
-extern void class_dev_iter_init(struct class_dev_iter *iter,
- struct class *class,
- struct device *start,
- const struct device_type *type);
-extern struct device *class_dev_iter_next(struct class_dev_iter *iter);
-extern void class_dev_iter_exit(struct class_dev_iter *iter);
-
-extern int class_for_each_device(struct class *class, struct device *start,
- void *data,
- int (*fn)(struct device *dev, void *data));
-extern struct device *class_find_device(struct class *class,
- struct device *start, const void *data,
- int (*match)(struct device *, const void *));
-
-/**
- * class_find_device_by_name - device iterator for locating a particular device
- * of a specific name.
- * @class: class type
- * @name: name of the device to match
- */
-static inline struct device *class_find_device_by_name(struct class *class,
- const char *name)
-{
- return class_find_device(class, NULL, name, device_match_name);
-}
-
-/**
- * class_find_device_by_of_node : device iterator for locating a particular device
- * matching the of_node.
- * @class: class type
- * @np: of_node of the device to match.
- */
-static inline struct device *
-class_find_device_by_of_node(struct class *class, const struct device_node *np)
-{
- return class_find_device(class, NULL, np, device_match_of_node);
-}
-
-/**
- * class_find_device_by_fwnode : device iterator for locating a particular device
- * matching the fwnode.
- * @class: class type
- * @fwnode: fwnode of the device to match.
- */
-static inline struct device *
-class_find_device_by_fwnode(struct class *class,
- const struct fwnode_handle *fwnode)
-{
- return class_find_device(class, NULL, fwnode, device_match_fwnode);
-}
-
-/**
- * class_find_device_by_devt : device iterator for locating a particular device
- * matching the device type.
- * @class: class type
- * @devt: device type of the device to match.
- */
-static inline struct device *class_find_device_by_devt(struct class *class,
- dev_t devt)
-{
- return class_find_device(class, NULL, &devt, device_match_devt);
-}
-
-#ifdef CONFIG_ACPI
-struct acpi_device;
-/**
- * class_find_device_by_acpi_dev : device iterator for locating a particular
- * device matching the ACPI_COMPANION device.
- * @class: class type
- * @adev: ACPI_COMPANION device to match.
- */
-static inline struct device *
-class_find_device_by_acpi_dev(struct class *class, const struct acpi_device *adev)
-{
- return class_find_device(class, NULL, adev, device_match_acpi_dev);
-}
-#else
-static inline struct device *
-class_find_device_by_acpi_dev(struct class *class, const void *adev)
-{
- return NULL;
-}
-#endif
-
-struct class_attribute {
- struct attribute attr;
- ssize_t (*show)(struct class *class, struct class_attribute *attr,
- char *buf);
- ssize_t (*store)(struct class *class, struct class_attribute *attr,
- const char *buf, size_t count);
-};
-
-#define CLASS_ATTR_RW(_name) \
- struct class_attribute class_attr_##_name = __ATTR_RW(_name)
-#define CLASS_ATTR_RO(_name) \
- struct class_attribute class_attr_##_name = __ATTR_RO(_name)
-#define CLASS_ATTR_WO(_name) \
- struct class_attribute class_attr_##_name = __ATTR_WO(_name)
-
-extern int __must_check class_create_file_ns(struct class *class,
- const struct class_attribute *attr,
- const void *ns);
-extern void class_remove_file_ns(struct class *class,
- const struct class_attribute *attr,
- const void *ns);
-
-static inline int __must_check class_create_file(struct class *class,
- const struct class_attribute *attr)
-{
- return class_create_file_ns(class, attr, NULL);
-}
-
-static inline void class_remove_file(struct class *class,
- const struct class_attribute *attr)
-{
- return class_remove_file_ns(class, attr, NULL);
-}
-
-/* Simple class attribute that is just a static string */
-struct class_attribute_string {
- struct class_attribute attr;
- char *str;
-};
-
-/* Currently read-only only */
-#define _CLASS_ATTR_STRING(_name, _mode, _str) \
- { __ATTR(_name, _mode, show_class_attr_string, NULL), _str }
-#define CLASS_ATTR_STRING(_name, _mode, _str) \
- struct class_attribute_string class_attr_##_name = \
- _CLASS_ATTR_STRING(_name, _mode, _str)
-
-extern ssize_t show_class_attr_string(struct class *class, struct class_attribute *attr,
- char *buf);
-
-struct class_interface {
- struct list_head node;
- struct class *class;
-
- int (*add_dev) (struct device *, struct class_interface *);
- void (*remove_dev) (struct device *, struct class_interface *);
-};
-
-extern int __must_check class_interface_register(struct class_interface *);
-extern void class_interface_unregister(struct class_interface *);
-
-extern struct class * __must_check __class_create(struct module *owner,
- const char *name,
- struct lock_class_key *key);
-extern void class_destroy(struct class *cls);
-
-/* This is a #define to keep the compiler from merging different
- * instances of the __key variable */
-#define class_create(owner, name) \
-({ \
- static struct lock_class_key __key; \
- __class_create(owner, name, &__key); \
-})
-
/*
* The type of device, "struct device" is embedded in. A class
* or bus can contain devices of different types
@@ -1520,8 +798,6 @@ static inline struct device_node *dev_of_node(struct device *dev)
return dev->of_node;
}
-void driver_init(void);
-
/*
* High level routines for use by the bus drivers
*/
@@ -1664,12 +940,8 @@ extern void put_device(struct device *dev);
extern bool kill_device(struct device *dev);
#ifdef CONFIG_DEVTMPFS
-extern int devtmpfs_create_node(struct device *dev);
-extern int devtmpfs_delete_node(struct device *dev);
extern int devtmpfs_mount(void);
#else
-static inline int devtmpfs_create_node(struct device *dev) { return 0; }
-static inline int devtmpfs_delete_node(struct device *dev) { return 0; }
static inline int devtmpfs_mount(void) { return 0; }
#endif
@@ -1687,221 +959,6 @@ void device_link_remove(void *consumer, struct device *supplier);
void device_links_supplier_sync_state_pause(void);
void device_links_supplier_sync_state_resume(void);
-#ifndef dev_fmt
-#define dev_fmt(fmt) fmt
-#endif
-
-#ifdef CONFIG_PRINTK
-
-__printf(3, 0) __cold
-int dev_vprintk_emit(int level, const struct device *dev,
- const char *fmt, va_list args);
-__printf(3, 4) __cold
-int dev_printk_emit(int level, const struct device *dev, const char *fmt, ...);
-
-__printf(3, 4) __cold
-void dev_printk(const char *level, const struct device *dev,
- const char *fmt, ...);
-__printf(2, 3) __cold
-void _dev_emerg(const struct device *dev, const char *fmt, ...);
-__printf(2, 3) __cold
-void _dev_alert(const struct device *dev, const char *fmt, ...);
-__printf(2, 3) __cold
-void _dev_crit(const struct device *dev, const char *fmt, ...);
-__printf(2, 3) __cold
-void _dev_err(const struct device *dev, const char *fmt, ...);
-__printf(2, 3) __cold
-void _dev_warn(const struct device *dev, const char *fmt, ...);
-__printf(2, 3) __cold
-void _dev_notice(const struct device *dev, const char *fmt, ...);
-__printf(2, 3) __cold
-void _dev_info(const struct device *dev, const char *fmt, ...);
-
-#else
-
-static inline __printf(3, 0)
-int dev_vprintk_emit(int level, const struct device *dev,
- const char *fmt, va_list args)
-{ return 0; }
-static inline __printf(3, 4)
-int dev_printk_emit(int level, const struct device *dev, const char *fmt, ...)
-{ return 0; }
-
-static inline void __dev_printk(const char *level, const struct device *dev,
- struct va_format *vaf)
-{}
-static inline __printf(3, 4)
-void dev_printk(const char *level, const struct device *dev,
- const char *fmt, ...)
-{}
-
-static inline __printf(2, 3)
-void _dev_emerg(const struct device *dev, const char *fmt, ...)
-{}
-static inline __printf(2, 3)
-void _dev_crit(const struct device *dev, const char *fmt, ...)
-{}
-static inline __printf(2, 3)
-void _dev_alert(const struct device *dev, const char *fmt, ...)
-{}
-static inline __printf(2, 3)
-void _dev_err(const struct device *dev, const char *fmt, ...)
-{}
-static inline __printf(2, 3)
-void _dev_warn(const struct device *dev, const char *fmt, ...)
-{}
-static inline __printf(2, 3)
-void _dev_notice(const struct device *dev, const char *fmt, ...)
-{}
-static inline __printf(2, 3)
-void _dev_info(const struct device *dev, const char *fmt, ...)
-{}
-
-#endif
-
-/*
- * #defines for all the dev_<level> macros to prefix with whatever
- * possible use of #define dev_fmt(fmt) ...
- */
-
-#define dev_emerg(dev, fmt, ...) \
- _dev_emerg(dev, dev_fmt(fmt), ##__VA_ARGS__)
-#define dev_crit(dev, fmt, ...) \
- _dev_crit(dev, dev_fmt(fmt), ##__VA_ARGS__)
-#define dev_alert(dev, fmt, ...) \
- _dev_alert(dev, dev_fmt(fmt), ##__VA_ARGS__)
-#define dev_err(dev, fmt, ...) \
- _dev_err(dev, dev_fmt(fmt), ##__VA_ARGS__)
-#define dev_warn(dev, fmt, ...) \
- _dev_warn(dev, dev_fmt(fmt), ##__VA_ARGS__)
-#define dev_notice(dev, fmt, ...) \
- _dev_notice(dev, dev_fmt(fmt), ##__VA_ARGS__)
-#define dev_info(dev, fmt, ...) \
- _dev_info(dev, dev_fmt(fmt), ##__VA_ARGS__)
-
-#if defined(CONFIG_DYNAMIC_DEBUG)
-#define dev_dbg(dev, fmt, ...) \
- dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
-#elif defined(DEBUG)
-#define dev_dbg(dev, fmt, ...) \
- dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__)
-#else
-#define dev_dbg(dev, fmt, ...) \
-({ \
- if (0) \
- dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
-})
-#endif
-
-#ifdef CONFIG_PRINTK
-#define dev_level_once(dev_level, dev, fmt, ...) \
-do { \
- static bool __print_once __read_mostly; \
- \
- if (!__print_once) { \
- __print_once = true; \
- dev_level(dev, fmt, ##__VA_ARGS__); \
- } \
-} while (0)
-#else
-#define dev_level_once(dev_level, dev, fmt, ...) \
-do { \
- if (0) \
- dev_level(dev, fmt, ##__VA_ARGS__); \
-} while (0)
-#endif
-
-#define dev_emerg_once(dev, fmt, ...) \
- dev_level_once(dev_emerg, dev, fmt, ##__VA_ARGS__)
-#define dev_alert_once(dev, fmt, ...) \
- dev_level_once(dev_alert, dev, fmt, ##__VA_ARGS__)
-#define dev_crit_once(dev, fmt, ...) \
- dev_level_once(dev_crit, dev, fmt, ##__VA_ARGS__)
-#define dev_err_once(dev, fmt, ...) \
- dev_level_once(dev_err, dev, fmt, ##__VA_ARGS__)
-#define dev_warn_once(dev, fmt, ...) \
- dev_level_once(dev_warn, dev, fmt, ##__VA_ARGS__)
-#define dev_notice_once(dev, fmt, ...) \
- dev_level_once(dev_notice, dev, fmt, ##__VA_ARGS__)
-#define dev_info_once(dev, fmt, ...) \
- dev_level_once(dev_info, dev, fmt, ##__VA_ARGS__)
-#define dev_dbg_once(dev, fmt, ...) \
- dev_level_once(dev_dbg, dev, fmt, ##__VA_ARGS__)
-
-#define dev_level_ratelimited(dev_level, dev, fmt, ...) \
-do { \
- static DEFINE_RATELIMIT_STATE(_rs, \
- DEFAULT_RATELIMIT_INTERVAL, \
- DEFAULT_RATELIMIT_BURST); \
- if (__ratelimit(&_rs)) \
- dev_level(dev, fmt, ##__VA_ARGS__); \
-} while (0)
-
-#define dev_emerg_ratelimited(dev, fmt, ...) \
- dev_level_ratelimited(dev_emerg, dev, fmt, ##__VA_ARGS__)
-#define dev_alert_ratelimited(dev, fmt, ...) \
- dev_level_ratelimited(dev_alert, dev, fmt, ##__VA_ARGS__)
-#define dev_crit_ratelimited(dev, fmt, ...) \
- dev_level_ratelimited(dev_crit, dev, fmt, ##__VA_ARGS__)
-#define dev_err_ratelimited(dev, fmt, ...) \
- dev_level_ratelimited(dev_err, dev, fmt, ##__VA_ARGS__)
-#define dev_warn_ratelimited(dev, fmt, ...) \
- dev_level_ratelimited(dev_warn, dev, fmt, ##__VA_ARGS__)
-#define dev_notice_ratelimited(dev, fmt, ...) \
- dev_level_ratelimited(dev_notice, dev, fmt, ##__VA_ARGS__)
-#define dev_info_ratelimited(dev, fmt, ...) \
- dev_level_ratelimited(dev_info, dev, fmt, ##__VA_ARGS__)
-#if defined(CONFIG_DYNAMIC_DEBUG)
-/* descriptor check is first to prevent flooding with "callbacks suppressed" */
-#define dev_dbg_ratelimited(dev, fmt, ...) \
-do { \
- static DEFINE_RATELIMIT_STATE(_rs, \
- DEFAULT_RATELIMIT_INTERVAL, \
- DEFAULT_RATELIMIT_BURST); \
- DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
- if (DYNAMIC_DEBUG_BRANCH(descriptor) && \
- __ratelimit(&_rs)) \
- __dynamic_dev_dbg(&descriptor, dev, dev_fmt(fmt), \
- ##__VA_ARGS__); \
-} while (0)
-#elif defined(DEBUG)
-#define dev_dbg_ratelimited(dev, fmt, ...) \
-do { \
- static DEFINE_RATELIMIT_STATE(_rs, \
- DEFAULT_RATELIMIT_INTERVAL, \
- DEFAULT_RATELIMIT_BURST); \
- if (__ratelimit(&_rs)) \
- dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
-} while (0)
-#else
-#define dev_dbg_ratelimited(dev, fmt, ...) \
-do { \
- if (0) \
- dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
-} while (0)
-#endif
-
-#ifdef VERBOSE_DEBUG
-#define dev_vdbg dev_dbg
-#else
-#define dev_vdbg(dev, fmt, ...) \
-({ \
- if (0) \
- dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
-})
-#endif
-
-/*
- * dev_WARN*() acts like dev_printk(), but with the key difference of
- * using WARN/WARN_ONCE to include file/line information and a backtrace.
- */
-#define dev_WARN(dev, format, arg...) \
- WARN(1, "%s %s: " format, dev_driver_string(dev), dev_name(dev), ## arg);
-
-#define dev_WARN_ONCE(dev, condition, format, arg...) \
- WARN_ONCE(condition, "%s %s: " format, \
- dev_driver_string(dev), dev_name(dev), ## arg)
-
/* Create alias, so I can be autoloaded. */
#define MODULE_ALIAS_CHARDEV(major,minor) \
MODULE_ALIAS("char-major-" __stringify(major) "-" __stringify(minor))
@@ -1914,52 +971,4 @@ extern long sysfs_deprecated;
#define sysfs_deprecated 0
#endif
-/**
- * module_driver() - Helper macro for drivers that don't do anything
- * special in module init/exit. This eliminates a lot of boilerplate.
- * Each module may only use this macro once, and calling it replaces
- * module_init() and module_exit().
- *
- * @__driver: driver name
- * @__register: register function for this driver type
- * @__unregister: unregister function for this driver type
- * @...: Additional arguments to be passed to __register and __unregister.
- *
- * Use this macro to construct bus specific macros for registering
- * drivers, and do not use it on its own.
- */
-#define module_driver(__driver, __register, __unregister, ...) \
-static int __init __driver##_init(void) \
-{ \
- return __register(&(__driver) , ##__VA_ARGS__); \
-} \
-module_init(__driver##_init); \
-static void __exit __driver##_exit(void) \
-{ \
- __unregister(&(__driver) , ##__VA_ARGS__); \
-} \
-module_exit(__driver##_exit);
-
-/**
- * builtin_driver() - Helper macro for drivers that don't do anything
- * special in init and have no exit. This eliminates some boilerplate.
- * Each driver may only use this macro once, and calling it replaces
- * device_initcall (or in some cases, the legacy __initcall). This is
- * meant to be a direct parallel of module_driver() above but without
- * the __exit stuff that is not used for builtin cases.
- *
- * @__driver: driver name
- * @__register: register function for this driver type
- * @...: Additional arguments to be passed to __register
- *
- * Use this macro to construct bus specific macros for registering
- * drivers, and do not use it on its own.
- */
-#define builtin_driver(__driver, __register, ...) \
-static int __init __driver##_init(void) \
-{ \
- return __register(&(__driver) , ##__VA_ARGS__); \
-} \
-device_initcall(__driver##_init);
-
#endif /* _DEVICE_H_ */
diff --git a/include/linux/device/bus.h b/include/linux/device/bus.h
new file mode 100644
index 0000000..1ea5e1d
--- /dev/null
+++ b/include/linux/device/bus.h
@@ -0,0 +1,288 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * bus.h - the bus-specific portions of the driver model
+ *
+ * Copyright (c) 2001-2003 Patrick Mochel <mochel@osdl.org>
+ * Copyright (c) 2004-2009 Greg Kroah-Hartman <gregkh@suse.de>
+ * Copyright (c) 2008-2009 Novell Inc.
+ * Copyright (c) 2012-2019 Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+ * Copyright (c) 2012-2019 Linux Foundation
+ *
+ * See Documentation/driver-api/driver-model/ for more information.
+ */
+
+#ifndef _DEVICE_BUS_H_
+#define _DEVICE_BUS_H_
+
+#include <linux/kobject.h>
+#include <linux/klist.h>
+#include <linux/pm.h>
+
+struct device_driver;
+struct fwnode_handle;
+
+/**
+ * struct bus_type - The bus type of the device
+ *
+ * @name: The name of the bus.
+ * @dev_name: Used for subsystems to enumerate devices like ("foo%u", dev->id).
+ * @dev_root: Default device to use as the parent.
+ * @bus_groups: Default attributes of the bus.
+ * @dev_groups: Default attributes of the devices on the bus.
+ * @drv_groups: Default attributes of the device drivers on the bus.
+ * @match: Called, perhaps multiple times, whenever a new device or driver
+ * is added for this bus. It should return a positive value if the
+ * given device can be handled by the given driver and zero
+ * otherwise. It may also return error code if determining that
+ * the driver supports the device is not possible. In case of
+ * -EPROBE_DEFER it will queue the device for deferred probing.
+ * @uevent: Called when a device is added, removed, or a few other things
+ * that generate uevents to add the environment variables.
+ * @probe: Called when a new device or driver add to this bus, and callback
+ * the specific driver's probe to initial the matched device.
+ * @sync_state: Called to sync device state to software state after all the
+ * state tracking consumers linked to this device (present at
+ * the time of late_initcall) have successfully bound to a
+ * driver. If the device has no consumers, this function will
+ * be called at late_initcall_sync level. If the device has
+ * consumers that are never bound to a driver, this function
+ * will never get called until they do.
+ * @remove: Called when a device removed from this bus.
+ * @shutdown: Called at shut-down time to quiesce the device.
+ *
+ * @online: Called to put the device back online (after offlining it).
+ * @offline: Called to put the device offline for hot-removal. May fail.
+ *
+ * @suspend: Called when a device on this bus wants to go to sleep mode.
+ * @resume: Called to bring a device on this bus out of sleep mode.
+ * @num_vf: Called to find out how many virtual functions a device on this
+ * bus supports.
+ * @dma_configure: Called to setup DMA configuration on a device on
+ * this bus.
+ * @pm: Power management operations of this bus, callback the specific
+ * device driver's pm-ops.
+ * @iommu_ops: IOMMU specific operations for this bus, used to attach IOMMU
+ * driver implementations to a bus and allow the driver to do
+ * bus-specific setup
+ * @p: The private data of the driver core, only the driver core can
+ * touch this.
+ * @lock_key: Lock class key for use by the lock validator
+ * @need_parent_lock: When probing or removing a device on this bus, the
+ * device core should lock the device's parent.
+ *
+ * A bus is a channel between the processor and one or more devices. For the
+ * purposes of the device model, all devices are connected via a bus, even if
+ * it is an internal, virtual, "platform" bus. Buses can plug into each other.
+ * A USB controller is usually a PCI device, for example. The device model
+ * represents the actual connections between buses and the devices they control.
+ * A bus is represented by the bus_type structure. It contains the name, the
+ * default attributes, the bus' methods, PM operations, and the driver core's
+ * private data.
+ */
+struct bus_type {
+ const char *name;
+ const char *dev_name;
+ struct device *dev_root;
+ const struct attribute_group **bus_groups;
+ const struct attribute_group **dev_groups;
+ const struct attribute_group **drv_groups;
+
+ int (*match)(struct device *dev, struct device_driver *drv);
+ int (*uevent)(struct device *dev, struct kobj_uevent_env *env);
+ int (*probe)(struct device *dev);
+ void (*sync_state)(struct device *dev);
+ int (*remove)(struct device *dev);
+ void (*shutdown)(struct device *dev);
+
+ int (*online)(struct device *dev);
+ int (*offline)(struct device *dev);
+
+ int (*suspend)(struct device *dev, pm_message_t state);
+ int (*resume)(struct device *dev);
+
+ int (*num_vf)(struct device *dev);
+
+ int (*dma_configure)(struct device *dev);
+
+ const struct dev_pm_ops *pm;
+
+ const struct iommu_ops *iommu_ops;
+
+ struct subsys_private *p;
+ struct lock_class_key lock_key;
+
+ bool need_parent_lock;
+};
+
+extern int __must_check bus_register(struct bus_type *bus);
+
+extern void bus_unregister(struct bus_type *bus);
+
+extern int __must_check bus_rescan_devices(struct bus_type *bus);
+
+struct bus_attribute {
+ struct attribute attr;
+ ssize_t (*show)(struct bus_type *bus, char *buf);
+ ssize_t (*store)(struct bus_type *bus, const char *buf, size_t count);
+};
+
+#define BUS_ATTR_RW(_name) \
+ struct bus_attribute bus_attr_##_name = __ATTR_RW(_name)
+#define BUS_ATTR_RO(_name) \
+ struct bus_attribute bus_attr_##_name = __ATTR_RO(_name)
+#define BUS_ATTR_WO(_name) \
+ struct bus_attribute bus_attr_##_name = __ATTR_WO(_name)
+
+extern int __must_check bus_create_file(struct bus_type *,
+ struct bus_attribute *);
+extern void bus_remove_file(struct bus_type *, struct bus_attribute *);
+
+/* Generic device matching functions that all busses can use to match with */
+int device_match_name(struct device *dev, const void *name);
+int device_match_of_node(struct device *dev, const void *np);
+int device_match_fwnode(struct device *dev, const void *fwnode);
+int device_match_devt(struct device *dev, const void *pdevt);
+int device_match_acpi_dev(struct device *dev, const void *adev);
+int device_match_any(struct device *dev, const void *unused);
+
+/* iterator helpers for buses */
+struct subsys_dev_iter {
+ struct klist_iter ki;
+ const struct device_type *type;
+};
+void subsys_dev_iter_init(struct subsys_dev_iter *iter,
+ struct bus_type *subsys,
+ struct device *start,
+ const struct device_type *type);
+struct device *subsys_dev_iter_next(struct subsys_dev_iter *iter);
+void subsys_dev_iter_exit(struct subsys_dev_iter *iter);
+
+int bus_for_each_dev(struct bus_type *bus, struct device *start, void *data,
+ int (*fn)(struct device *dev, void *data));
+struct device *bus_find_device(struct bus_type *bus, struct device *start,
+ const void *data,
+ int (*match)(struct device *dev, const void *data));
+/**
+ * bus_find_device_by_name - device iterator for locating a particular device
+ * of a specific name.
+ * @bus: bus type
+ * @start: Device to begin with
+ * @name: name of the device to match
+ */
+static inline struct device *bus_find_device_by_name(struct bus_type *bus,
+ struct device *start,
+ const char *name)
+{
+ return bus_find_device(bus, start, name, device_match_name);
+}
+
+/**
+ * bus_find_device_by_of_node : device iterator for locating a particular device
+ * matching the of_node.
+ * @bus: bus type
+ * @np: of_node of the device to match.
+ */
+static inline struct device *
+bus_find_device_by_of_node(struct bus_type *bus, const struct device_node *np)
+{
+ return bus_find_device(bus, NULL, np, device_match_of_node);
+}
+
+/**
+ * bus_find_device_by_fwnode : device iterator for locating a particular device
+ * matching the fwnode.
+ * @bus: bus type
+ * @fwnode: fwnode of the device to match.
+ */
+static inline struct device *
+bus_find_device_by_fwnode(struct bus_type *bus, const struct fwnode_handle *fwnode)
+{
+ return bus_find_device(bus, NULL, fwnode, device_match_fwnode);
+}
+
+/**
+ * bus_find_device_by_devt : device iterator for locating a particular device
+ * matching the device type.
+ * @bus: bus type
+ * @devt: device type of the device to match.
+ */
+static inline struct device *bus_find_device_by_devt(struct bus_type *bus,
+ dev_t devt)
+{
+ return bus_find_device(bus, NULL, &devt, device_match_devt);
+}
+
+/**
+ * bus_find_next_device - Find the next device after a given device in a
+ * given bus.
+ * @bus: bus type
+ * @cur: device to begin the search with.
+ */
+static inline struct device *
+bus_find_next_device(struct bus_type *bus,struct device *cur)
+{
+ return bus_find_device(bus, cur, NULL, device_match_any);
+}
+
+#ifdef CONFIG_ACPI
+struct acpi_device;
+
+/**
+ * bus_find_device_by_acpi_dev : device iterator for locating a particular device
+ * matching the ACPI COMPANION device.
+ * @bus: bus type
+ * @adev: ACPI COMPANION device to match.
+ */
+static inline struct device *
+bus_find_device_by_acpi_dev(struct bus_type *bus, const struct acpi_device *adev)
+{
+ return bus_find_device(bus, NULL, adev, device_match_acpi_dev);
+}
+#else
+static inline struct device *
+bus_find_device_by_acpi_dev(struct bus_type *bus, const void *adev)
+{
+ return NULL;
+}
+#endif
+
+struct device *subsys_find_device_by_id(struct bus_type *bus, unsigned int id,
+ struct device *hint);
+int bus_for_each_drv(struct bus_type *bus, struct device_driver *start,
+ void *data, int (*fn)(struct device_driver *, void *));
+void bus_sort_breadthfirst(struct bus_type *bus,
+ int (*compare)(const struct device *a,
+ const struct device *b));
+/*
+ * Bus notifiers: Get notified of addition/removal of devices
+ * and binding/unbinding of drivers to devices.
+ * In the long run, it should be a replacement for the platform
+ * notify hooks.
+ */
+struct notifier_block;
+
+extern int bus_register_notifier(struct bus_type *bus,
+ struct notifier_block *nb);
+extern int bus_unregister_notifier(struct bus_type *bus,
+ struct notifier_block *nb);
+
+/* All 4 notifers below get called with the target struct device *
+ * as an argument. Note that those functions are likely to be called
+ * with the device lock held in the core, so be careful.
+ */
+#define BUS_NOTIFY_ADD_DEVICE 0x00000001 /* device added */
+#define BUS_NOTIFY_DEL_DEVICE 0x00000002 /* device to be removed */
+#define BUS_NOTIFY_REMOVED_DEVICE 0x00000003 /* device removed */
+#define BUS_NOTIFY_BIND_DRIVER 0x00000004 /* driver about to be
+ bound */
+#define BUS_NOTIFY_BOUND_DRIVER 0x00000005 /* driver bound to device */
+#define BUS_NOTIFY_UNBIND_DRIVER 0x00000006 /* driver about to be
+ unbound */
+#define BUS_NOTIFY_UNBOUND_DRIVER 0x00000007 /* driver is unbound
+ from the device */
+#define BUS_NOTIFY_DRIVER_NOT_BOUND 0x00000008 /* driver fails to be bound */
+
+extern struct kset *bus_get_kset(struct bus_type *bus);
+extern struct klist *bus_get_device_klist(struct bus_type *bus);
+
+#endif
diff --git a/include/linux/device/class.h b/include/linux/device/class.h
new file mode 100644
index 0000000..e8d470c
--- /dev/null
+++ b/include/linux/device/class.h
@@ -0,0 +1,266 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * The class-specific portions of the driver model
+ *
+ * Copyright (c) 2001-2003 Patrick Mochel <mochel@osdl.org>
+ * Copyright (c) 2004-2009 Greg Kroah-Hartman <gregkh@suse.de>
+ * Copyright (c) 2008-2009 Novell Inc.
+ * Copyright (c) 2012-2019 Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+ * Copyright (c) 2012-2019 Linux Foundation
+ *
+ * See Documentation/driver-api/driver-model/ for more information.
+ */
+
+#ifndef _DEVICE_CLASS_H_
+#define _DEVICE_CLASS_H_
+
+#include <linux/kobject.h>
+#include <linux/klist.h>
+#include <linux/pm.h>
+#include <linux/device/bus.h>
+
+struct device;
+struct fwnode_handle;
+
+/**
+ * struct class - device classes
+ * @name: Name of the class.
+ * @owner: The module owner.
+ * @class_groups: Default attributes of this class.
+ * @dev_groups: Default attributes of the devices that belong to the class.
+ * @dev_kobj: The kobject that represents this class and links it into the hierarchy.
+ * @dev_uevent: Called when a device is added, removed from this class, or a
+ * few other things that generate uevents to add the environment
+ * variables.
+ * @devnode: Callback to provide the devtmpfs.
+ * @class_release: Called to release this class.
+ * @dev_release: Called to release the device.
+ * @shutdown_pre: Called at shut-down time before driver shutdown.
+ * @ns_type: Callbacks so sysfs can detemine namespaces.
+ * @namespace: Namespace of the device belongs to this class.
+ * @get_ownership: Allows class to specify uid/gid of the sysfs directories
+ * for the devices belonging to the class. Usually tied to
+ * device's namespace.
+ * @pm: The default device power management operations of this class.
+ * @p: The private data of the driver core, no one other than the
+ * driver core can touch this.
+ *
+ * A class is a higher-level view of a device that abstracts out low-level
+ * implementation details. Drivers may see a SCSI disk or an ATA disk, but,
+ * at the class level, they are all simply disks. Classes allow user space
+ * to work with devices based on what they do, rather than how they are
+ * connected or how they work.
+ */
+struct class {
+ const char *name;
+ struct module *owner;
+
+ const struct attribute_group **class_groups;
+ const struct attribute_group **dev_groups;
+ struct kobject *dev_kobj;
+
+ int (*dev_uevent)(struct device *dev, struct kobj_uevent_env *env);
+ char *(*devnode)(struct device *dev, umode_t *mode);
+
+ void (*class_release)(struct class *class);
+ void (*dev_release)(struct device *dev);
+
+ int (*shutdown_pre)(struct device *dev);
+
+ const struct kobj_ns_type_operations *ns_type;
+ const void *(*namespace)(struct device *dev);
+
+ void (*get_ownership)(struct device *dev, kuid_t *uid, kgid_t *gid);
+
+ const struct dev_pm_ops *pm;
+
+ struct subsys_private *p;
+};
+
+struct class_dev_iter {
+ struct klist_iter ki;
+ const struct device_type *type;
+};
+
+extern struct kobject *sysfs_dev_block_kobj;
+extern struct kobject *sysfs_dev_char_kobj;
+extern int __must_check __class_register(struct class *class,
+ struct lock_class_key *key);
+extern void class_unregister(struct class *class);
+
+/* This is a #define to keep the compiler from merging different
+ * instances of the __key variable */
+#define class_register(class) \
+({ \
+ static struct lock_class_key __key; \
+ __class_register(class, &__key); \
+})
+
+struct class_compat;
+struct class_compat *class_compat_register(const char *name);
+void class_compat_unregister(struct class_compat *cls);
+int class_compat_create_link(struct class_compat *cls, struct device *dev,
+ struct device *device_link);
+void class_compat_remove_link(struct class_compat *cls, struct device *dev,
+ struct device *device_link);
+
+extern void class_dev_iter_init(struct class_dev_iter *iter,
+ struct class *class,
+ struct device *start,
+ const struct device_type *type);
+extern struct device *class_dev_iter_next(struct class_dev_iter *iter);
+extern void class_dev_iter_exit(struct class_dev_iter *iter);
+
+extern int class_for_each_device(struct class *class, struct device *start,
+ void *data,
+ int (*fn)(struct device *dev, void *data));
+extern struct device *class_find_device(struct class *class,
+ struct device *start, const void *data,
+ int (*match)(struct device *, const void *));
+
+/**
+ * class_find_device_by_name - device iterator for locating a particular device
+ * of a specific name.
+ * @class: class type
+ * @name: name of the device to match
+ */
+static inline struct device *class_find_device_by_name(struct class *class,
+ const char *name)
+{
+ return class_find_device(class, NULL, name, device_match_name);
+}
+
+/**
+ * class_find_device_by_of_node : device iterator for locating a particular device
+ * matching the of_node.
+ * @class: class type
+ * @np: of_node of the device to match.
+ */
+static inline struct device *
+class_find_device_by_of_node(struct class *class, const struct device_node *np)
+{
+ return class_find_device(class, NULL, np, device_match_of_node);
+}
+
+/**
+ * class_find_device_by_fwnode : device iterator for locating a particular device
+ * matching the fwnode.
+ * @class: class type
+ * @fwnode: fwnode of the device to match.
+ */
+static inline struct device *
+class_find_device_by_fwnode(struct class *class,
+ const struct fwnode_handle *fwnode)
+{
+ return class_find_device(class, NULL, fwnode, device_match_fwnode);
+}
+
+/**
+ * class_find_device_by_devt : device iterator for locating a particular device
+ * matching the device type.
+ * @class: class type
+ * @devt: device type of the device to match.
+ */
+static inline struct device *class_find_device_by_devt(struct class *class,
+ dev_t devt)
+{
+ return class_find_device(class, NULL, &devt, device_match_devt);
+}
+
+#ifdef CONFIG_ACPI
+struct acpi_device;
+/**
+ * class_find_device_by_acpi_dev : device iterator for locating a particular
+ * device matching the ACPI_COMPANION device.
+ * @class: class type
+ * @adev: ACPI_COMPANION device to match.
+ */
+static inline struct device *
+class_find_device_by_acpi_dev(struct class *class, const struct acpi_device *adev)
+{
+ return class_find_device(class, NULL, adev, device_match_acpi_dev);
+}
+#else
+static inline struct device *
+class_find_device_by_acpi_dev(struct class *class, const void *adev)
+{
+ return NULL;
+}
+#endif
+
+struct class_attribute {
+ struct attribute attr;
+ ssize_t (*show)(struct class *class, struct class_attribute *attr,
+ char *buf);
+ ssize_t (*store)(struct class *class, struct class_attribute *attr,
+ const char *buf, size_t count);
+};
+
+#define CLASS_ATTR_RW(_name) \
+ struct class_attribute class_attr_##_name = __ATTR_RW(_name)
+#define CLASS_ATTR_RO(_name) \
+ struct class_attribute class_attr_##_name = __ATTR_RO(_name)
+#define CLASS_ATTR_WO(_name) \
+ struct class_attribute class_attr_##_name = __ATTR_WO(_name)
+
+extern int __must_check class_create_file_ns(struct class *class,
+ const struct class_attribute *attr,
+ const void *ns);
+extern void class_remove_file_ns(struct class *class,
+ const struct class_attribute *attr,
+ const void *ns);
+
+static inline int __must_check class_create_file(struct class *class,
+ const struct class_attribute *attr)
+{
+ return class_create_file_ns(class, attr, NULL);
+}
+
+static inline void class_remove_file(struct class *class,
+ const struct class_attribute *attr)
+{
+ return class_remove_file_ns(class, attr, NULL);
+}
+
+/* Simple class attribute that is just a static string */
+struct class_attribute_string {
+ struct class_attribute attr;
+ char *str;
+};
+
+/* Currently read-only only */
+#define _CLASS_ATTR_STRING(_name, _mode, _str) \
+ { __ATTR(_name, _mode, show_class_attr_string, NULL), _str }
+#define CLASS_ATTR_STRING(_name, _mode, _str) \
+ struct class_attribute_string class_attr_##_name = \
+ _CLASS_ATTR_STRING(_name, _mode, _str)
+
+extern ssize_t show_class_attr_string(struct class *class, struct class_attribute *attr,
+ char *buf);
+
+struct class_interface {
+ struct list_head node;
+ struct class *class;
+
+ int (*add_dev) (struct device *, struct class_interface *);
+ void (*remove_dev) (struct device *, struct class_interface *);
+};
+
+extern int __must_check class_interface_register(struct class_interface *);
+extern void class_interface_unregister(struct class_interface *);
+
+extern struct class * __must_check __class_create(struct module *owner,
+ const char *name,
+ struct lock_class_key *key);
+extern void class_destroy(struct class *cls);
+
+/* This is a #define to keep the compiler from merging different
+ * instances of the __key variable */
+#define class_create(owner, name) \
+({ \
+ static struct lock_class_key __key; \
+ __class_create(owner, name, &__key); \
+})
+
+
+#endif /* _DEVICE_CLASS_H_ */
diff --git a/include/linux/device/driver.h b/include/linux/device/driver.h
new file mode 100644
index 0000000..1188260
--- /dev/null
+++ b/include/linux/device/driver.h
@@ -0,0 +1,292 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * The driver-specific portions of the driver model
+ *
+ * Copyright (c) 2001-2003 Patrick Mochel <mochel@osdl.org>
+ * Copyright (c) 2004-2009 Greg Kroah-Hartman <gregkh@suse.de>
+ * Copyright (c) 2008-2009 Novell Inc.
+ * Copyright (c) 2012-2019 Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+ * Copyright (c) 2012-2019 Linux Foundation
+ *
+ * See Documentation/driver-api/driver-model/ for more information.
+ */
+
+#ifndef _DEVICE_DRIVER_H_
+#define _DEVICE_DRIVER_H_
+
+#include <linux/kobject.h>
+#include <linux/klist.h>
+#include <linux/pm.h>
+#include <linux/device/bus.h>
+
+/**
+ * enum probe_type - device driver probe type to try
+ * Device drivers may opt in for special handling of their
+ * respective probe routines. This tells the core what to
+ * expect and prefer.
+ *
+ * @PROBE_DEFAULT_STRATEGY: Used by drivers that work equally well
+ * whether probed synchronously or asynchronously.
+ * @PROBE_PREFER_ASYNCHRONOUS: Drivers for "slow" devices which
+ * probing order is not essential for booting the system may
+ * opt into executing their probes asynchronously.
+ * @PROBE_FORCE_SYNCHRONOUS: Use this to annotate drivers that need
+ * their probe routines to run synchronously with driver and
+ * device registration (with the exception of -EPROBE_DEFER
+ * handling - re-probing always ends up being done asynchronously).
+ *
+ * Note that the end goal is to switch the kernel to use asynchronous
+ * probing by default, so annotating drivers with
+ * %PROBE_PREFER_ASYNCHRONOUS is a temporary measure that allows us
+ * to speed up boot process while we are validating the rest of the
+ * drivers.
+ */
+enum probe_type {
+ PROBE_DEFAULT_STRATEGY,
+ PROBE_PREFER_ASYNCHRONOUS,
+ PROBE_FORCE_SYNCHRONOUS,
+};
+
+/**
+ * struct device_driver - The basic device driver structure
+ * @name: Name of the device driver.
+ * @bus: The bus which the device of this driver belongs to.
+ * @owner: The module owner.
+ * @mod_name: Used for built-in modules.
+ * @suppress_bind_attrs: Disables bind/unbind via sysfs.
+ * @probe_type: Type of the probe (synchronous or asynchronous) to use.
+ * @of_match_table: The open firmware table.
+ * @acpi_match_table: The ACPI match table.
+ * @probe: Called to query the existence of a specific device,
+ * whether this driver can work with it, and bind the driver
+ * to a specific device.
+ * @sync_state: Called to sync device state to software state after all the
+ * state tracking consumers linked to this device (present at
+ * the time of late_initcall) have successfully bound to a
+ * driver. If the device has no consumers, this function will
+ * be called at late_initcall_sync level. If the device has
+ * consumers that are never bound to a driver, this function
+ * will never get called until they do.
+ * @remove: Called when the device is removed from the system to
+ * unbind a device from this driver.
+ * @shutdown: Called at shut-down time to quiesce the device.
+ * @suspend: Called to put the device to sleep mode. Usually to a
+ * low power state.
+ * @resume: Called to bring a device from sleep mode.
+ * @groups: Default attributes that get created by the driver core
+ * automatically.
+ * @dev_groups: Additional attributes attached to device instance once the
+ * it is bound to the driver.
+ * @pm: Power management operations of the device which matched
+ * this driver.
+ * @coredump: Called when sysfs entry is written to. The device driver
+ * is expected to call the dev_coredump API resulting in a
+ * uevent.
+ * @p: Driver core's private data, no one other than the driver
+ * core can touch this.
+ *
+ * The device driver-model tracks all of the drivers known to the system.
+ * The main reason for this tracking is to enable the driver core to match
+ * up drivers with new devices. Once drivers are known objects within the
+ * system, however, a number of other things become possible. Device drivers
+ * can export information and configuration variables that are independent
+ * of any specific device.
+ */
+struct device_driver {
+ const char *name;
+ struct bus_type *bus;
+
+ struct module *owner;
+ const char *mod_name; /* used for built-in modules */
+
+ bool suppress_bind_attrs; /* disables bind/unbind via sysfs */
+ enum probe_type probe_type;
+
+ const struct of_device_id *of_match_table;
+ const struct acpi_device_id *acpi_match_table;
+
+ int (*probe) (struct device *dev);
+ void (*sync_state)(struct device *dev);
+ int (*remove) (struct device *dev);
+ void (*shutdown) (struct device *dev);
+ int (*suspend) (struct device *dev, pm_message_t state);
+ int (*resume) (struct device *dev);
+ const struct attribute_group **groups;
+ const struct attribute_group **dev_groups;
+
+ const struct dev_pm_ops *pm;
+ void (*coredump) (struct device *dev);
+
+ struct driver_private *p;
+};
+
+
+extern int __must_check driver_register(struct device_driver *drv);
+extern void driver_unregister(struct device_driver *drv);
+
+extern struct device_driver *driver_find(const char *name,
+ struct bus_type *bus);
+extern int driver_probe_done(void);
+extern void wait_for_device_probe(void);
+
+/* sysfs interface for exporting driver attributes */
+
+struct driver_attribute {
+ struct attribute attr;
+ ssize_t (*show)(struct device_driver *driver, char *buf);
+ ssize_t (*store)(struct device_driver *driver, const char *buf,
+ size_t count);
+};
+
+#define DRIVER_ATTR_RW(_name) \
+ struct driver_attribute driver_attr_##_name = __ATTR_RW(_name)
+#define DRIVER_ATTR_RO(_name) \
+ struct driver_attribute driver_attr_##_name = __ATTR_RO(_name)
+#define DRIVER_ATTR_WO(_name) \
+ struct driver_attribute driver_attr_##_name = __ATTR_WO(_name)
+
+extern int __must_check driver_create_file(struct device_driver *driver,
+ const struct driver_attribute *attr);
+extern void driver_remove_file(struct device_driver *driver,
+ const struct driver_attribute *attr);
+
+extern int __must_check driver_for_each_device(struct device_driver *drv,
+ struct device *start,
+ void *data,
+ int (*fn)(struct device *dev,
+ void *));
+struct device *driver_find_device(struct device_driver *drv,
+ struct device *start, const void *data,
+ int (*match)(struct device *dev, const void *data));
+
+/**
+ * driver_find_device_by_name - device iterator for locating a particular device
+ * of a specific name.
+ * @drv: the driver we're iterating
+ * @name: name of the device to match
+ */
+static inline struct device *driver_find_device_by_name(struct device_driver *drv,
+ const char *name)
+{
+ return driver_find_device(drv, NULL, name, device_match_name);
+}
+
+/**
+ * driver_find_device_by_of_node- device iterator for locating a particular device
+ * by of_node pointer.
+ * @drv: the driver we're iterating
+ * @np: of_node pointer to match.
+ */
+static inline struct device *
+driver_find_device_by_of_node(struct device_driver *drv,
+ const struct device_node *np)
+{
+ return driver_find_device(drv, NULL, np, device_match_of_node);
+}
+
+/**
+ * driver_find_device_by_fwnode- device iterator for locating a particular device
+ * by fwnode pointer.
+ * @drv: the driver we're iterating
+ * @fwnode: fwnode pointer to match.
+ */
+static inline struct device *
+driver_find_device_by_fwnode(struct device_driver *drv,
+ const struct fwnode_handle *fwnode)
+{
+ return driver_find_device(drv, NULL, fwnode, device_match_fwnode);
+}
+
+/**
+ * driver_find_device_by_devt- device iterator for locating a particular device
+ * by devt.
+ * @drv: the driver we're iterating
+ * @devt: devt pointer to match.
+ */
+static inline struct device *driver_find_device_by_devt(struct device_driver *drv,
+ dev_t devt)
+{
+ return driver_find_device(drv, NULL, &devt, device_match_devt);
+}
+
+static inline struct device *driver_find_next_device(struct device_driver *drv,
+ struct device *start)
+{
+ return driver_find_device(drv, start, NULL, device_match_any);
+}
+
+#ifdef CONFIG_ACPI
+/**
+ * driver_find_device_by_acpi_dev : device iterator for locating a particular
+ * device matching the ACPI_COMPANION device.
+ * @drv: the driver we're iterating
+ * @adev: ACPI_COMPANION device to match.
+ */
+static inline struct device *
+driver_find_device_by_acpi_dev(struct device_driver *drv,
+ const struct acpi_device *adev)
+{
+ return driver_find_device(drv, NULL, adev, device_match_acpi_dev);
+}
+#else
+static inline struct device *
+driver_find_device_by_acpi_dev(struct device_driver *drv, const void *adev)
+{
+ return NULL;
+}
+#endif
+
+void driver_deferred_probe_add(struct device *dev);
+int driver_deferred_probe_check_state(struct device *dev);
+int driver_deferred_probe_check_state_continue(struct device *dev);
+void driver_init(void);
+
+/**
+ * module_driver() - Helper macro for drivers that don't do anything
+ * special in module init/exit. This eliminates a lot of boilerplate.
+ * Each module may only use this macro once, and calling it replaces
+ * module_init() and module_exit().
+ *
+ * @__driver: driver name
+ * @__register: register function for this driver type
+ * @__unregister: unregister function for this driver type
+ * @...: Additional arguments to be passed to __register and __unregister.
+ *
+ * Use this macro to construct bus specific macros for registering
+ * drivers, and do not use it on its own.
+ */
+#define module_driver(__driver, __register, __unregister, ...) \
+static int __init __driver##_init(void) \
+{ \
+ return __register(&(__driver) , ##__VA_ARGS__); \
+} \
+module_init(__driver##_init); \
+static void __exit __driver##_exit(void) \
+{ \
+ __unregister(&(__driver) , ##__VA_ARGS__); \
+} \
+module_exit(__driver##_exit);
+
+/**
+ * builtin_driver() - Helper macro for drivers that don't do anything
+ * special in init and have no exit. This eliminates some boilerplate.
+ * Each driver may only use this macro once, and calling it replaces
+ * device_initcall (or in some cases, the legacy __initcall). This is
+ * meant to be a direct parallel of module_driver() above but without
+ * the __exit stuff that is not used for builtin cases.
+ *
+ * @__driver: driver name
+ * @__register: register function for this driver type
+ * @...: Additional arguments to be passed to __register
+ *
+ * Use this macro to construct bus specific macros for registering
+ * drivers, and do not use it on its own.
+ */
+#define builtin_driver(__driver, __register, ...) \
+static int __init __driver##_init(void) \
+{ \
+ return __register(&(__driver) , ##__VA_ARGS__); \
+} \
+device_initcall(__driver##_init);
+
+#endif /* _DEVICE_DRIVER_H_ */
diff --git a/init/main.c b/init/main.c
index da1bc0b..db13a76 100644
--- a/init/main.c
+++ b/init/main.c
@@ -63,7 +63,7 @@
#include <linux/lockdep.h>
#include <linux/kmemleak.h>
#include <linux/pid_namespace.h>
-#include <linux/device.h>
+#include <linux/device/driver.h>
#include <linux/kthread.h>
#include <linux/sched.h>
#include <linux/sched/init.h>
