Driver core changes for 5.6-rc1
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.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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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
...
5.9.x+fslc
Linus Torvalds
commit
975f9ce9a0
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|
@ -248,6 +248,16 @@ core_initcall(free_raw_capacity);
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#endif
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#if defined(CONFIG_ARM64) || defined(CONFIG_RISCV)
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/*
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* This function returns the logic cpu number of the node.
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* There are basically three kinds of return values:
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* (1) logic cpu number which is > 0.
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* (2) -ENODEV when the device tree(DT) node is valid and found in the DT but
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* there is no possible logical CPU in the kernel to match. This happens
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* when CONFIG_NR_CPUS is configure to be smaller than the number of
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* CPU nodes in DT. We need to just ignore this case.
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* (3) -1 if the node does not exist in the device tree
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*/
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static int __init get_cpu_for_node(struct device_node *node)
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{
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struct device_node *cpu_node;
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@ -261,7 +271,8 @@ static int __init get_cpu_for_node(struct device_node *node)
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if (cpu >= 0)
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topology_parse_cpu_capacity(cpu_node, cpu);
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else
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pr_crit("Unable to find CPU node for %pOF\n", cpu_node);
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pr_info("CPU node for %pOF exist but the possible cpu range is :%*pbl\n",
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cpu_node, cpumask_pr_args(cpu_possible_mask));
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of_node_put(cpu_node);
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return cpu;
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@ -286,9 +297,8 @@ static int __init parse_core(struct device_node *core, int package_id,
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cpu_topology[cpu].package_id = package_id;
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cpu_topology[cpu].core_id = core_id;
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cpu_topology[cpu].thread_id = i;
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} else {
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pr_err("%pOF: Can't get CPU for thread\n",
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t);
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} else if (cpu != -ENODEV) {
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pr_err("%pOF: Can't get CPU for thread\n", t);
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of_node_put(t);
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return -EINVAL;
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}
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@ -307,7 +317,7 @@ static int __init parse_core(struct device_node *core, int package_id,
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cpu_topology[cpu].package_id = package_id;
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cpu_topology[cpu].core_id = core_id;
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} else if (leaf) {
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} else if (leaf && cpu != -ENODEV) {
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pr_err("%pOF: Can't get CPU for leaf core\n", core);
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return -EINVAL;
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}
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@ -1,4 +1,15 @@
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 2001-2003 Patrick Mochel <mochel@osdl.org>
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* Copyright (c) 2004-2009 Greg Kroah-Hartman <gregkh@suse.de>
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* Copyright (c) 2008-2012 Novell Inc.
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* Copyright (c) 2012-2019 Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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* Copyright (c) 2012-2019 Linux Foundation
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*
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* Core driver model functions and structures that should not be
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* shared outside of the drivers/base/ directory.
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*
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*/
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#include <linux/notifier.h>
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/**
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@ -175,3 +186,11 @@ extern void device_links_unbind_consumers(struct device *dev);
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/* device pm support */
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void device_pm_move_to_tail(struct device *dev);
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#ifdef CONFIG_DEVTMPFS
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int devtmpfs_create_node(struct device *dev);
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int devtmpfs_delete_node(struct device *dev);
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#else
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static inline int devtmpfs_create_node(struct device *dev) { return 0; }
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static inline int devtmpfs_delete_node(struct device *dev) { return 0; }
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#endif
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@ -9,6 +9,7 @@
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*/
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#include <linux/async.h>
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#include <linux/device/bus.h>
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#include <linux/device.h>
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#include <linux/module.h>
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#include <linux/errno.h>
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@ -8,6 +8,7 @@
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* Copyright (c) 2003-2004 IBM Corp.
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*/
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#include <linux/device/class.h>
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#include <linux/device.h>
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#include <linux/module.h>
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#include <linux/init.h>
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@ -11,7 +11,6 @@
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#include <linux/device.h>
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#include <linux/kref.h>
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#include <linux/list.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/slab.h>
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#include <linux/debugfs.h>
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@ -102,11 +101,11 @@ static int component_devices_show(struct seq_file *s, void *data)
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seq_printf(s, "%-40s %20s\n", "device name", "status");
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seq_puts(s, "-------------------------------------------------------------\n");
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for (i = 0; i < match->num; i++) {
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struct device *d = (struct device *)match->compare[i].data;
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struct component *component = match->compare[i].component;
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seq_printf(s, "%-40s %20s\n", dev_name(d),
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match->compare[i].component ?
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"registered" : "not registered");
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seq_printf(s, "%-40s %20s\n",
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component ? dev_name(component->dev) : "(unknown)",
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component ? (component->bound ? "bound" : "not bound") : "not registered");
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}
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mutex_unlock(&component_mutex);
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@ -775,5 +774,3 @@ void component_del(struct device *dev, const struct component_ops *ops)
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kfree(component);
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}
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EXPORT_SYMBOL_GPL(component_del);
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MODULE_LICENSE("GPL v2");
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|
|
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@ -516,7 +516,10 @@ static int really_probe(struct device *dev, struct device_driver *drv)
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atomic_inc(&probe_count);
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pr_debug("bus: '%s': %s: probing driver %s with device %s\n",
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drv->bus->name, __func__, drv->name, dev_name(dev));
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WARN_ON(!list_empty(&dev->devres_head));
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if (!list_empty(&dev->devres_head)) {
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dev_crit(dev, "Resources present before probing\n");
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return -EBUSY;
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}
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re_probe:
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dev->driver = drv;
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|
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@ -30,11 +30,7 @@
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static struct task_struct *thread;
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#if defined CONFIG_DEVTMPFS_MOUNT
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static int mount_dev = 1;
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#else
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static int mount_dev;
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#endif
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static int __initdata mount_dev = IS_ENABLED(CONFIG_DEVTMPFS_MOUNT);
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static DEFINE_SPINLOCK(req_lock);
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@ -93,6 +89,23 @@ static inline int is_blockdev(struct device *dev)
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static inline int is_blockdev(struct device *dev) { return 0; }
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#endif
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static int devtmpfs_submit_req(struct req *req, const char *tmp)
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{
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init_completion(&req->done);
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spin_lock(&req_lock);
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req->next = requests;
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requests = req;
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spin_unlock(&req_lock);
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wake_up_process(thread);
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wait_for_completion(&req->done);
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kfree(tmp);
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return req->err;
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}
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int devtmpfs_create_node(struct device *dev)
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{
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const char *tmp = NULL;
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@ -117,19 +130,7 @@ int devtmpfs_create_node(struct device *dev)
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req.dev = dev;
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init_completion(&req.done);
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spin_lock(&req_lock);
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req.next = requests;
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requests = &req;
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spin_unlock(&req_lock);
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wake_up_process(thread);
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wait_for_completion(&req.done);
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kfree(tmp);
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return req.err;
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return devtmpfs_submit_req(&req, tmp);
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}
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int devtmpfs_delete_node(struct device *dev)
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@ -147,18 +148,7 @@ int devtmpfs_delete_node(struct device *dev)
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req.mode = 0;
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req.dev = dev;
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init_completion(&req.done);
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spin_lock(&req_lock);
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req.next = requests;
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requests = &req;
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spin_unlock(&req_lock);
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wake_up_process(thread);
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wait_for_completion(&req.done);
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kfree(tmp);
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return req.err;
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return devtmpfs_submit_req(&req, tmp);
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}
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static int dev_mkdir(const char *name, umode_t mode)
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@ -359,7 +349,7 @@ static int handle_remove(const char *nodename, struct device *dev)
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* If configured, or requested by the commandline, devtmpfs will be
|
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* auto-mounted after the kernel mounted the root filesystem.
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*/
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int devtmpfs_mount(void)
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int __init devtmpfs_mount(void)
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{
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int err;
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@ -388,18 +378,30 @@ static int handle(const char *name, umode_t mode, kuid_t uid, kgid_t gid,
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return handle_remove(name, dev);
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}
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static int devtmpfsd(void *p)
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static int devtmpfs_setup(void *p)
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{
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int *err = p;
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*err = ksys_unshare(CLONE_NEWNS);
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if (*err)
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int err;
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err = ksys_unshare(CLONE_NEWNS);
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if (err)
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goto out;
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*err = do_mount("devtmpfs", "/", "devtmpfs", MS_SILENT, NULL);
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if (*err)
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err = do_mount("devtmpfs", "/", "devtmpfs", MS_SILENT, NULL);
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if (err)
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goto out;
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ksys_chdir("/.."); /* will traverse into overmounted root */
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ksys_chroot(".");
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out:
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*(int *)p = err;
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complete(&setup_done);
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return err;
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}
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static int devtmpfsd(void *p)
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{
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int err = devtmpfs_setup(p);
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|
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if (err)
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return err;
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while (1) {
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spin_lock(&req_lock);
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while (requests) {
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|
|
@ -420,9 +422,6 @@ static int devtmpfsd(void *p)
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schedule();
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}
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return 0;
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out:
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complete(&setup_done);
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return *err;
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}
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|
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/*
|
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|
|
|
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|
|
@ -8,6 +8,7 @@
|
|||
* Copyright (c) 2007 Novell Inc.
|
||||
*/
|
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|
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#include <linux/device/driver.h>
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#include <linux/device.h>
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#include <linux/module.h>
|
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#include <linux/errno.h>
|
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|
|
|
|||
|
|
@ -606,7 +606,7 @@ static bool fw_run_sysfs_fallback(enum fw_opt opt_flags)
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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.
|
||||
**/
|
||||
|
|
|
|||
|
|
@ -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 {
|
||||
|
|
|
|||
|
|
@ -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;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -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);
|
||||
|
|
|
|||
|
|
@ -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);
|
||||
|
|
|
|||
|
|
@ -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);
|
||||
|
||||
|
|
|
|||
|
|
@ -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);
|
||||
|
||||
|
|
|
|||
|
|
@ -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));
|
||||
|
|
|
|||
|
|
@ -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_ */
|
||||
File diff suppressed because it is too large
Load Diff
|
|
@ -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
|
||||
|
|
@ -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_ */
|
||||
|
|
@ -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_ */
|
||||
|
|
@ -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>
|
||||
|
|
|
|||
Loading…
Reference in New Issue