| Message ID | 20210219111501.14261-7-arnaud.pouliquen@foss.st.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | introduce a generic IOCTL interface for RPMsg channels management | expand |
On Fri, Feb 19, 2021 at 12:14:51PM +0100, Arnaud Pouliquen wrote: > Move the code related to the rpmsg_ctrl char device to the new > rpmsg_ctrl.c module. > Manage the dependency in the kconfig. > > Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com> > --- > drivers/rpmsg/Kconfig | 9 ++ > drivers/rpmsg/Makefile | 1 + > drivers/rpmsg/rpmsg_char.c | 163 ---------------------------- > drivers/rpmsg/rpmsg_ctrl.c | 216 +++++++++++++++++++++++++++++++++++++ > 4 files changed, 226 insertions(+), 163 deletions(-) > create mode 100644 drivers/rpmsg/rpmsg_ctrl.c > > diff --git a/drivers/rpmsg/Kconfig b/drivers/rpmsg/Kconfig > index 0b4407abdf13..2d0cd7fdd710 100644 > --- a/drivers/rpmsg/Kconfig > +++ b/drivers/rpmsg/Kconfig > @@ -10,11 +10,20 @@ config RPMSG_CHAR > tristate "RPMSG device interface" > depends on RPMSG > depends on NET > + select RPMSG_CTRL > help > Say Y here to export rpmsg endpoints as device files, usually found > in /dev. They make it possible for user-space programs to send and > receive rpmsg packets. > > +config RPMSG_CTRL > + tristate "RPMSG control interface" > + depends on RPMSG > + help > + Say Y here to enable the support of the /dev/rpmsg_ctlX API. This API s/rpmsg_ctlX/rpmsg_ctrlX > + allows user-space programs to create endpoints with specific service name, > + source and destination addresses. > + > config RPMSG_NS > tristate "RPMSG name service announcement" > depends on RPMSG > diff --git a/drivers/rpmsg/Makefile b/drivers/rpmsg/Makefile > index 8d452656f0ee..58e3b382e316 100644 > --- a/drivers/rpmsg/Makefile > +++ b/drivers/rpmsg/Makefile > @@ -1,6 +1,7 @@ > # SPDX-License-Identifier: GPL-2.0 > obj-$(CONFIG_RPMSG) += rpmsg_core.o > obj-$(CONFIG_RPMSG_CHAR) += rpmsg_char.o > +obj-$(CONFIG_RPMSG_CTRL) += rpmsg_ctrl.o > obj-$(CONFIG_RPMSG_NS) += rpmsg_ns.o > obj-$(CONFIG_RPMSG_MTK_SCP) += mtk_rpmsg.o > qcom_glink-objs := qcom_glink_native.o qcom_glink_ssr.o > diff --git a/drivers/rpmsg/rpmsg_char.c b/drivers/rpmsg/rpmsg_char.c > index 23e369a00531..83c10b39b139 100644 > --- a/drivers/rpmsg/rpmsg_char.c > +++ b/drivers/rpmsg/rpmsg_char.c > @@ -31,28 +31,12 @@ > static dev_t rpmsg_major; > static struct class *rpmsg_class; > > -static DEFINE_IDA(rpmsg_ctrl_ida); > static DEFINE_IDA(rpmsg_ept_ida); > static DEFINE_IDA(rpmsg_minor_ida); > > #define dev_to_eptdev(dev) container_of(dev, struct rpmsg_eptdev, dev) > #define cdev_to_eptdev(i_cdev) container_of(i_cdev, struct rpmsg_eptdev, cdev) > > -#define dev_to_ctrldev(dev) container_of(dev, struct rpmsg_ctrldev, dev) > -#define cdev_to_ctrldev(i_cdev) container_of(i_cdev, struct rpmsg_ctrldev, cdev) > - > -/** > - * struct rpmsg_ctrldev - control device for instantiating endpoint devices > - * @rpdev: underlaying rpmsg device > - * @cdev: cdev for the ctrl device > - * @dev: device for the ctrl device > - */ > -struct rpmsg_ctrldev { > - struct rpmsg_device *rpdev; > - struct cdev cdev; > - struct device dev; > -}; This showed up in rpmsg_ctrl.c as rpmsg_ctrl. The same goes for many functions names - they are removed here and re-introduced under a different name, which makes it very hard to follow. What ends up in the new file should be a carbon copy of what was moved. I'm out of time for today, more comments tomorrow. Thanks, Mathieu > - > /** > * struct rpmsg_eptdev - endpoint device context > * @dev: endpoint device > @@ -411,145 +395,6 @@ int rpmsg_chrdev_create_eptdev(struct rpmsg_device *rpdev, struct device *parent > } > EXPORT_SYMBOL(rpmsg_chrdev_create_eptdev); > > -static int rpmsg_ctrldev_open(struct inode *inode, struct file *filp) > -{ > - struct rpmsg_ctrldev *ctrldev = cdev_to_ctrldev(inode->i_cdev); > - > - get_device(&ctrldev->dev); > - filp->private_data = ctrldev; > - > - return 0; > -} > - > -static int rpmsg_ctrldev_release(struct inode *inode, struct file *filp) > -{ > - struct rpmsg_ctrldev *ctrldev = cdev_to_ctrldev(inode->i_cdev); > - > - put_device(&ctrldev->dev); > - > - return 0; > -} > - > -static long rpmsg_ctrldev_ioctl(struct file *fp, unsigned int cmd, > - unsigned long arg) > -{ > - struct rpmsg_ctrldev *ctrldev = fp->private_data; > - void __user *argp = (void __user *)arg; > - struct rpmsg_endpoint_info eptinfo; > - struct rpmsg_channel_info chinfo; > - > - if (cmd != RPMSG_CREATE_EPT_IOCTL) > - return -EINVAL; > - > - if (copy_from_user(&eptinfo, argp, sizeof(eptinfo))) > - return -EFAULT; > - > - memcpy(chinfo.name, eptinfo.name, RPMSG_NAME_SIZE); > - chinfo.name[RPMSG_NAME_SIZE-1] = '\0'; > - chinfo.src = eptinfo.src; > - chinfo.dst = eptinfo.dst; > - > - return rpmsg_chrdev_create_eptdev(ctrldev->rpdev, &ctrldev->dev, chinfo); > -}; > - > -static const struct file_operations rpmsg_ctrldev_fops = { > - .owner = THIS_MODULE, > - .open = rpmsg_ctrldev_open, > - .release = rpmsg_ctrldev_release, > - .unlocked_ioctl = rpmsg_ctrldev_ioctl, > - .compat_ioctl = compat_ptr_ioctl, > -}; > - > -static void rpmsg_ctrldev_release_device(struct device *dev) > -{ > - struct rpmsg_ctrldev *ctrldev = dev_to_ctrldev(dev); > - > - ida_simple_remove(&rpmsg_ctrl_ida, dev->id); > - ida_simple_remove(&rpmsg_minor_ida, MINOR(dev->devt)); > - cdev_del(&ctrldev->cdev); > - kfree(ctrldev); > -} > - > -static int rpmsg_chrdev_probe(struct rpmsg_device *rpdev) > -{ > - struct rpmsg_ctrldev *ctrldev; > - struct device *dev; > - int ret; > - > - ctrldev = kzalloc(sizeof(*ctrldev), GFP_KERNEL); > - if (!ctrldev) > - return -ENOMEM; > - > - ctrldev->rpdev = rpdev; > - > - dev = &ctrldev->dev; > - device_initialize(dev); > - dev->parent = &rpdev->dev; > - > - cdev_init(&ctrldev->cdev, &rpmsg_ctrldev_fops); > - ctrldev->cdev.owner = THIS_MODULE; > - > - ret = ida_simple_get(&rpmsg_minor_ida, 0, RPMSG_DEV_MAX, GFP_KERNEL); > - if (ret < 0) > - goto free_ctrldev; > - dev->devt = MKDEV(MAJOR(rpmsg_major), ret); > - > - ret = ida_simple_get(&rpmsg_ctrl_ida, 0, 0, GFP_KERNEL); > - if (ret < 0) > - goto free_minor_ida; > - dev->id = ret; > - dev_set_name(&ctrldev->dev, "rpmsg_ctrl%d", ret); > - > - ret = cdev_add(&ctrldev->cdev, dev->devt, 1); > - if (ret) > - goto free_ctrl_ida; > - > - /* We can now rely on the release function for cleanup */ > - dev->release = rpmsg_ctrldev_release_device; > - > - ret = device_add(dev); > - if (ret) { > - dev_err(&rpdev->dev, "device_add failed: %d\n", ret); > - put_device(dev); > - } > - > - dev_set_drvdata(&rpdev->dev, ctrldev); > - > - return ret; > - > -free_ctrl_ida: > - ida_simple_remove(&rpmsg_ctrl_ida, dev->id); > -free_minor_ida: > - ida_simple_remove(&rpmsg_minor_ida, MINOR(dev->devt)); > -free_ctrldev: > - put_device(dev); > - kfree(ctrldev); > - > - return ret; > -} > - > -static void rpmsg_chrdev_remove(struct rpmsg_device *rpdev) > -{ > - struct rpmsg_ctrldev *ctrldev = dev_get_drvdata(&rpdev->dev); > - int ret; > - > - /* Destroy all endpoints */ > - ret = device_for_each_child(&ctrldev->dev, NULL, rpmsg_chrdev_eptdev_destroy); > - if (ret) > - dev_warn(&rpdev->dev, "failed to nuke endpoints: %d\n", ret); > - > - device_del(&ctrldev->dev); > - put_device(&ctrldev->dev); > -} > - > -static struct rpmsg_driver rpmsg_chrdev_driver = { > - .probe = rpmsg_chrdev_probe, > - .remove = rpmsg_chrdev_remove, > - .drv = { > - .name = "rpmsg_chrdev", > - }, > -}; > - > static int rpmsg_chrdev_init(void) > { > int ret; > @@ -567,20 +412,12 @@ static int rpmsg_chrdev_init(void) > return PTR_ERR(rpmsg_class); > } > > - ret = register_rpmsg_driver(&rpmsg_chrdev_driver); > - if (ret < 0) { > - pr_err("rpmsgchr: failed to register rpmsg driver\n"); > - class_destroy(rpmsg_class); > - unregister_chrdev_region(rpmsg_major, RPMSG_DEV_MAX); > - } > - > return ret; > } > postcore_initcall(rpmsg_chrdev_init); > > static void rpmsg_chrdev_exit(void) > { > - unregister_rpmsg_driver(&rpmsg_chrdev_driver); > class_destroy(rpmsg_class); > unregister_chrdev_region(rpmsg_major, RPMSG_DEV_MAX); > } > diff --git a/drivers/rpmsg/rpmsg_ctrl.c b/drivers/rpmsg/rpmsg_ctrl.c > new file mode 100644 > index 000000000000..fa05b67d24da > --- /dev/null > +++ b/drivers/rpmsg/rpmsg_ctrl.c > @@ -0,0 +1,216 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * Copyright (C) 2021, STMicroelectronics > + * Copyright (c) 2016, Linaro Ltd. > + * Copyright (c) 2012, Michal Simek <monstr@monstr.eu> > + * Copyright (c) 2012, PetaLogix > + * Copyright (c) 2011, Texas Instruments, Inc. > + * Copyright (c) 2011, Google, Inc. > + * > + * Based on rpmsg performance statistics driver by Michal Simek, which in turn > + * was based on TI & Google OMX rpmsg driver. > + */ > +#include <linux/cdev.h> > +#include <linux/device.h> > +#include <linux/fs.h> > +#include <linux/idr.h> > +#include <linux/kernel.h> > +#include <linux/module.h> > +#include <linux/rpmsg.h> > +#include <linux/slab.h> > +#include <uapi/linux/rpmsg.h> > + > +#include "rpmsg_char.h" > +#include "rpmsg_internal.h" > + > +#define RPMSG_DEV_MAX (MINORMASK + 1) > + > +static dev_t rpmsg_major; > + > +static DEFINE_IDA(rpmsg_ctrl_ida); > +static DEFINE_IDA(rpmsg_minor_ida); > + > +#define dev_to_ctrldev(dev) container_of(dev, struct rpmsg_ctrl, dev) > +#define cdev_to_ctrldev(i_cdev) container_of(i_cdev, struct rpmsg_ctrl, cdev) > + > +/** > + * struct rpmsg_ctrl - control device for instantiating endpoint devices > + * @rpdev: underlaying rpmsg device > + * @cdev: cdev for the ctrl device > + * @dev: device for the ctrl device > + */ > +struct rpmsg_ctrl { > + struct rpmsg_device *rpdev; > + struct cdev cdev; > + struct device dev; > +}; > + > +static int rpmsg_ctrl_open(struct inode *inode, struct file *filp) > +{ > + struct rpmsg_ctrl *ctrldev = cdev_to_ctrldev(inode->i_cdev); > + > + get_device(&ctrldev->dev); > + filp->private_data = ctrldev; > + > + return 0; > +} > + > +static int rpmsg_ctrl_release(struct inode *inode, struct file *filp) > +{ > + struct rpmsg_ctrl *ctrldev = cdev_to_ctrldev(inode->i_cdev); > + > + put_device(&ctrldev->dev); > + > + return 0; > +} > + > +static long rpmsg_ctrl_ioctl(struct file *fp, unsigned int cmd, unsigned long arg) > +{ > + struct rpmsg_ctrl *ctrldev = fp->private_data; > + void __user *argp = (void __user *)arg; > + struct rpmsg_endpoint_info eptinfo; > + struct rpmsg_channel_info chinfo; > + > + if (cmd != RPMSG_CREATE_EPT_IOCTL) > + return -EINVAL; > + > + if (copy_from_user(&eptinfo, argp, sizeof(eptinfo))) > + return -EFAULT; > + > + memcpy(chinfo.name, eptinfo.name, RPMSG_NAME_SIZE); > + chinfo.name[RPMSG_NAME_SIZE - 1] = '\0'; > + chinfo.src = eptinfo.src; > + chinfo.dst = eptinfo.dst; > + > + return rpmsg_chrdev_create_eptdev(ctrldev->rpdev, &ctrldev->dev, chinfo); > +}; > + > +static const struct file_operations rpmsg_ctrl_fops = { > + .owner = THIS_MODULE, > + .open = rpmsg_ctrl_open, > + .release = rpmsg_ctrl_release, > + .unlocked_ioctl = rpmsg_ctrl_ioctl, > + .compat_ioctl = compat_ptr_ioctl, > +}; > + > +static void rpmsg_ctrl_release_device(struct device *dev) > +{ > + struct rpmsg_ctrl *ctrldev = dev_to_ctrldev(dev); > + > + ida_simple_remove(&rpmsg_ctrl_ida, dev->id); > + ida_simple_remove(&rpmsg_minor_ida, MINOR(dev->devt)); > + cdev_del(&ctrldev->cdev); > + kfree(ctrldev); > +} > + > +static int rpmsg_ctrl_probe(struct rpmsg_device *rpdev) > +{ > + struct rpmsg_ctrl *ctrldev; > + struct device *dev; > + int ret; > + > + ctrldev = kzalloc(sizeof(*ctrldev), GFP_KERNEL); > + if (!ctrldev) > + return -ENOMEM; > + > + ctrldev->rpdev = rpdev; > + > + dev = &ctrldev->dev; > + device_initialize(dev); > + dev->parent = &rpdev->dev; > + > + cdev_init(&ctrldev->cdev, &rpmsg_ctrl_fops); > + ctrldev->cdev.owner = THIS_MODULE; > + > + ret = ida_simple_get(&rpmsg_minor_ida, 0, RPMSG_DEV_MAX, GFP_KERNEL); > + if (ret < 0) > + goto free_ctrldev; > + dev->devt = MKDEV(MAJOR(rpmsg_major), ret); > + > + ret = ida_simple_get(&rpmsg_ctrl_ida, 0, 0, GFP_KERNEL); > + if (ret < 0) > + goto free_minor_ida; > + dev->id = ret; > + dev_set_name(&ctrldev->dev, "rpmsg_ctrl%d", ret); > + > + ret = cdev_add(&ctrldev->cdev, dev->devt, 1); > + if (ret) > + goto free_ctrl_ida; > + > + /* We can now rely on the release function for cleanup */ > + dev->release = rpmsg_ctrl_release_device; > + > + ret = device_add(dev); > + if (ret) { > + dev_err(&rpdev->dev, "device_add failed: %d\n", ret); > + put_device(dev); > + } > + > + dev_set_drvdata(&rpdev->dev, ctrldev); > + > + return ret; > + > +free_ctrl_ida: > + ida_simple_remove(&rpmsg_ctrl_ida, dev->id); > +free_minor_ida: > + ida_simple_remove(&rpmsg_minor_ida, MINOR(dev->devt)); > +free_ctrldev: > + put_device(dev); > + kfree(ctrldev); > + > + return ret; > +} > + > +static void rpmsg_ctrl_remove(struct rpmsg_device *rpdev) > +{ > + struct rpmsg_ctrl *ctrldev = dev_get_drvdata(&rpdev->dev); > + int ret; > + > + /* Destroy all endpoints */ > + ret = device_for_each_child(&ctrldev->dev, NULL, > + rpmsg_chrdev_eptdev_destroy); > + if (ret) > + dev_warn(&rpdev->dev, "failed to nuke endpoints: %d\n", ret); > + > + device_del(&ctrldev->dev); > + put_device(&ctrldev->dev); > +} > + > +static struct rpmsg_driver rpmsg_ctrl_driver = { > + .probe = rpmsg_ctrl_probe, > + .remove = rpmsg_ctrl_remove, > + .drv = { > + .name = "rpmsg_chrdev", > + }, > +}; > + > +static int rpmsg_ctrl_init(void) > +{ > + int ret; > + > + ret = alloc_chrdev_region(&rpmsg_major, 0, RPMSG_DEV_MAX, "rpmsg"); > + if (ret < 0) { > + pr_err("rpmsg: failed to allocate char dev region\n"); > + return ret; > + } > + > + ret = register_rpmsg_driver(&rpmsg_ctrl_driver); > + if (ret < 0) { > + pr_err("rpmsg ctrl: failed to register rpmsg driver\n"); > + unregister_chrdev_region(rpmsg_major, RPMSG_DEV_MAX); > + } > + > + return ret; > +} > +postcore_initcall(rpmsg_ctrl_init); > + > +static void rpmsg_ctrl_exit(void) > +{ > + unregister_rpmsg_driver(&rpmsg_ctrl_driver); > + unregister_chrdev_region(rpmsg_major, RPMSG_DEV_MAX); > +} > +module_exit(rpmsg_ctrl_exit); > + > +MODULE_DESCRIPTION("rpmsg control interface"); > +MODULE_ALIAS("rpmsg:" KBUILD_MODNAME); > +MODULE_LICENSE("GPL v2"); > -- > 2.17.1 >
On 3/2/21 7:35 PM, Mathieu Poirier wrote: > On Fri, Feb 19, 2021 at 12:14:51PM +0100, Arnaud Pouliquen wrote: >> Move the code related to the rpmsg_ctrl char device to the new >> rpmsg_ctrl.c module. >> Manage the dependency in the kconfig. >> >> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com> >> --- >> drivers/rpmsg/Kconfig | 9 ++ >> drivers/rpmsg/Makefile | 1 + >> drivers/rpmsg/rpmsg_char.c | 163 ---------------------------- >> drivers/rpmsg/rpmsg_ctrl.c | 216 +++++++++++++++++++++++++++++++++++++ >> 4 files changed, 226 insertions(+), 163 deletions(-) >> create mode 100644 drivers/rpmsg/rpmsg_ctrl.c >> >> diff --git a/drivers/rpmsg/Kconfig b/drivers/rpmsg/Kconfig >> index 0b4407abdf13..2d0cd7fdd710 100644 >> --- a/drivers/rpmsg/Kconfig >> +++ b/drivers/rpmsg/Kconfig >> @@ -10,11 +10,20 @@ config RPMSG_CHAR >> tristate "RPMSG device interface" >> depends on RPMSG >> depends on NET >> + select RPMSG_CTRL >> help >> Say Y here to export rpmsg endpoints as device files, usually found >> in /dev. They make it possible for user-space programs to send and >> receive rpmsg packets. >> >> +config RPMSG_CTRL >> + tristate "RPMSG control interface" >> + depends on RPMSG >> + help >> + Say Y here to enable the support of the /dev/rpmsg_ctlX API. This API > > s/rpmsg_ctlX/rpmsg_ctrlX Good catch! > >> + allows user-space programs to create endpoints with specific service name, >> + source and destination addresses. >> + >> config RPMSG_NS >> tristate "RPMSG name service announcement" >> depends on RPMSG >> diff --git a/drivers/rpmsg/Makefile b/drivers/rpmsg/Makefile >> index 8d452656f0ee..58e3b382e316 100644 >> --- a/drivers/rpmsg/Makefile >> +++ b/drivers/rpmsg/Makefile >> @@ -1,6 +1,7 @@ >> # SPDX-License-Identifier: GPL-2.0 >> obj-$(CONFIG_RPMSG) += rpmsg_core.o >> obj-$(CONFIG_RPMSG_CHAR) += rpmsg_char.o >> +obj-$(CONFIG_RPMSG_CTRL) += rpmsg_ctrl.o >> obj-$(CONFIG_RPMSG_NS) += rpmsg_ns.o >> obj-$(CONFIG_RPMSG_MTK_SCP) += mtk_rpmsg.o >> qcom_glink-objs := qcom_glink_native.o qcom_glink_ssr.o >> diff --git a/drivers/rpmsg/rpmsg_char.c b/drivers/rpmsg/rpmsg_char.c >> index 23e369a00531..83c10b39b139 100644 >> --- a/drivers/rpmsg/rpmsg_char.c >> +++ b/drivers/rpmsg/rpmsg_char.c >> @@ -31,28 +31,12 @@ >> static dev_t rpmsg_major; >> static struct class *rpmsg_class; >> >> -static DEFINE_IDA(rpmsg_ctrl_ida); >> static DEFINE_IDA(rpmsg_ept_ida); >> static DEFINE_IDA(rpmsg_minor_ida); >> >> #define dev_to_eptdev(dev) container_of(dev, struct rpmsg_eptdev, dev) >> #define cdev_to_eptdev(i_cdev) container_of(i_cdev, struct rpmsg_eptdev, cdev) >> >> -#define dev_to_ctrldev(dev) container_of(dev, struct rpmsg_ctrldev, dev) >> -#define cdev_to_ctrldev(i_cdev) container_of(i_cdev, struct rpmsg_ctrldev, cdev) >> - >> -/** >> - * struct rpmsg_ctrldev - control device for instantiating endpoint devices >> - * @rpdev: underlaying rpmsg device >> - * @cdev: cdev for the ctrl device >> - * @dev: device for the ctrl device >> - */ >> -struct rpmsg_ctrldev { >> - struct rpmsg_device *rpdev; >> - struct cdev cdev; >> - struct device dev; >> -}; > > This showed up in rpmsg_ctrl.c as rpmsg_ctrl. The same goes for many functions > names - they are removed here and re-introduced under a different name, which > makes it very hard to follow. What ends up in the new file should be a carbon > copy of what was moved. Ok i will split it in 2 steps. Thanks Arnaud > > I'm out of time for today, more comments tomorrow. > > Thanks, > Mathieu > >> - >> /** >> * struct rpmsg_eptdev - endpoint device context >> * @dev: endpoint device >> @@ -411,145 +395,6 @@ int rpmsg_chrdev_create_eptdev(struct rpmsg_device *rpdev, struct device *parent >> } >> EXPORT_SYMBOL(rpmsg_chrdev_create_eptdev); >> >> -static int rpmsg_ctrldev_open(struct inode *inode, struct file *filp) >> -{ >> - struct rpmsg_ctrldev *ctrldev = cdev_to_ctrldev(inode->i_cdev); >> - >> - get_device(&ctrldev->dev); >> - filp->private_data = ctrldev; >> - >> - return 0; >> -} >> - >> -static int rpmsg_ctrldev_release(struct inode *inode, struct file *filp) >> -{ >> - struct rpmsg_ctrldev *ctrldev = cdev_to_ctrldev(inode->i_cdev); >> - >> - put_device(&ctrldev->dev); >> - >> - return 0; >> -} >> - >> -static long rpmsg_ctrldev_ioctl(struct file *fp, unsigned int cmd, >> - unsigned long arg) >> -{ >> - struct rpmsg_ctrldev *ctrldev = fp->private_data; >> - void __user *argp = (void __user *)arg; >> - struct rpmsg_endpoint_info eptinfo; >> - struct rpmsg_channel_info chinfo; >> - >> - if (cmd != RPMSG_CREATE_EPT_IOCTL) >> - return -EINVAL; >> - >> - if (copy_from_user(&eptinfo, argp, sizeof(eptinfo))) >> - return -EFAULT; >> - >> - memcpy(chinfo.name, eptinfo.name, RPMSG_NAME_SIZE); >> - chinfo.name[RPMSG_NAME_SIZE-1] = '\0'; >> - chinfo.src = eptinfo.src; >> - chinfo.dst = eptinfo.dst; >> - >> - return rpmsg_chrdev_create_eptdev(ctrldev->rpdev, &ctrldev->dev, chinfo); >> -}; >> - >> -static const struct file_operations rpmsg_ctrldev_fops = { >> - .owner = THIS_MODULE, >> - .open = rpmsg_ctrldev_open, >> - .release = rpmsg_ctrldev_release, >> - .unlocked_ioctl = rpmsg_ctrldev_ioctl, >> - .compat_ioctl = compat_ptr_ioctl, >> -}; >> - >> -static void rpmsg_ctrldev_release_device(struct device *dev) >> -{ >> - struct rpmsg_ctrldev *ctrldev = dev_to_ctrldev(dev); >> - >> - ida_simple_remove(&rpmsg_ctrl_ida, dev->id); >> - ida_simple_remove(&rpmsg_minor_ida, MINOR(dev->devt)); >> - cdev_del(&ctrldev->cdev); >> - kfree(ctrldev); >> -} >> - >> -static int rpmsg_chrdev_probe(struct rpmsg_device *rpdev) >> -{ >> - struct rpmsg_ctrldev *ctrldev; >> - struct device *dev; >> - int ret; >> - >> - ctrldev = kzalloc(sizeof(*ctrldev), GFP_KERNEL); >> - if (!ctrldev) >> - return -ENOMEM; >> - >> - ctrldev->rpdev = rpdev; >> - >> - dev = &ctrldev->dev; >> - device_initialize(dev); >> - dev->parent = &rpdev->dev; >> - >> - cdev_init(&ctrldev->cdev, &rpmsg_ctrldev_fops); >> - ctrldev->cdev.owner = THIS_MODULE; >> - >> - ret = ida_simple_get(&rpmsg_minor_ida, 0, RPMSG_DEV_MAX, GFP_KERNEL); >> - if (ret < 0) >> - goto free_ctrldev; >> - dev->devt = MKDEV(MAJOR(rpmsg_major), ret); >> - >> - ret = ida_simple_get(&rpmsg_ctrl_ida, 0, 0, GFP_KERNEL); >> - if (ret < 0) >> - goto free_minor_ida; >> - dev->id = ret; >> - dev_set_name(&ctrldev->dev, "rpmsg_ctrl%d", ret); >> - >> - ret = cdev_add(&ctrldev->cdev, dev->devt, 1); >> - if (ret) >> - goto free_ctrl_ida; >> - >> - /* We can now rely on the release function for cleanup */ >> - dev->release = rpmsg_ctrldev_release_device; >> - >> - ret = device_add(dev); >> - if (ret) { >> - dev_err(&rpdev->dev, "device_add failed: %d\n", ret); >> - put_device(dev); >> - } >> - >> - dev_set_drvdata(&rpdev->dev, ctrldev); >> - >> - return ret; >> - >> -free_ctrl_ida: >> - ida_simple_remove(&rpmsg_ctrl_ida, dev->id); >> -free_minor_ida: >> - ida_simple_remove(&rpmsg_minor_ida, MINOR(dev->devt)); >> -free_ctrldev: >> - put_device(dev); >> - kfree(ctrldev); >> - >> - return ret; >> -} >> - >> -static void rpmsg_chrdev_remove(struct rpmsg_device *rpdev) >> -{ >> - struct rpmsg_ctrldev *ctrldev = dev_get_drvdata(&rpdev->dev); >> - int ret; >> - >> - /* Destroy all endpoints */ >> - ret = device_for_each_child(&ctrldev->dev, NULL, rpmsg_chrdev_eptdev_destroy); >> - if (ret) >> - dev_warn(&rpdev->dev, "failed to nuke endpoints: %d\n", ret); >> - >> - device_del(&ctrldev->dev); >> - put_device(&ctrldev->dev); >> -} >> - >> -static struct rpmsg_driver rpmsg_chrdev_driver = { >> - .probe = rpmsg_chrdev_probe, >> - .remove = rpmsg_chrdev_remove, >> - .drv = { >> - .name = "rpmsg_chrdev", >> - }, >> -}; >> - >> static int rpmsg_chrdev_init(void) >> { >> int ret; >> @@ -567,20 +412,12 @@ static int rpmsg_chrdev_init(void) >> return PTR_ERR(rpmsg_class); >> } >> >> - ret = register_rpmsg_driver(&rpmsg_chrdev_driver); >> - if (ret < 0) { >> - pr_err("rpmsgchr: failed to register rpmsg driver\n"); >> - class_destroy(rpmsg_class); >> - unregister_chrdev_region(rpmsg_major, RPMSG_DEV_MAX); >> - } >> - >> return ret; >> } >> postcore_initcall(rpmsg_chrdev_init); >> >> static void rpmsg_chrdev_exit(void) >> { >> - unregister_rpmsg_driver(&rpmsg_chrdev_driver); >> class_destroy(rpmsg_class); >> unregister_chrdev_region(rpmsg_major, RPMSG_DEV_MAX); >> } >> diff --git a/drivers/rpmsg/rpmsg_ctrl.c b/drivers/rpmsg/rpmsg_ctrl.c >> new file mode 100644 >> index 000000000000..fa05b67d24da >> --- /dev/null >> +++ b/drivers/rpmsg/rpmsg_ctrl.c >> @@ -0,0 +1,216 @@ >> +// SPDX-License-Identifier: GPL-2.0 >> +/* >> + * Copyright (C) 2021, STMicroelectronics >> + * Copyright (c) 2016, Linaro Ltd. >> + * Copyright (c) 2012, Michal Simek <monstr@monstr.eu> >> + * Copyright (c) 2012, PetaLogix >> + * Copyright (c) 2011, Texas Instruments, Inc. >> + * Copyright (c) 2011, Google, Inc. >> + * >> + * Based on rpmsg performance statistics driver by Michal Simek, which in turn >> + * was based on TI & Google OMX rpmsg driver. >> + */ >> +#include <linux/cdev.h> >> +#include <linux/device.h> >> +#include <linux/fs.h> >> +#include <linux/idr.h> >> +#include <linux/kernel.h> >> +#include <linux/module.h> >> +#include <linux/rpmsg.h> >> +#include <linux/slab.h> >> +#include <uapi/linux/rpmsg.h> >> + >> +#include "rpmsg_char.h" >> +#include "rpmsg_internal.h" >> + >> +#define RPMSG_DEV_MAX (MINORMASK + 1) >> + >> +static dev_t rpmsg_major; >> + >> +static DEFINE_IDA(rpmsg_ctrl_ida); >> +static DEFINE_IDA(rpmsg_minor_ida); >> + >> +#define dev_to_ctrldev(dev) container_of(dev, struct rpmsg_ctrl, dev) >> +#define cdev_to_ctrldev(i_cdev) container_of(i_cdev, struct rpmsg_ctrl, cdev) >> + >> +/** >> + * struct rpmsg_ctrl - control device for instantiating endpoint devices >> + * @rpdev: underlaying rpmsg device >> + * @cdev: cdev for the ctrl device >> + * @dev: device for the ctrl device >> + */ >> +struct rpmsg_ctrl { >> + struct rpmsg_device *rpdev; >> + struct cdev cdev; >> + struct device dev; >> +}; >> + >> +static int rpmsg_ctrl_open(struct inode *inode, struct file *filp) >> +{ >> + struct rpmsg_ctrl *ctrldev = cdev_to_ctrldev(inode->i_cdev); >> + >> + get_device(&ctrldev->dev); >> + filp->private_data = ctrldev; >> + >> + return 0; >> +} >> + >> +static int rpmsg_ctrl_release(struct inode *inode, struct file *filp) >> +{ >> + struct rpmsg_ctrl *ctrldev = cdev_to_ctrldev(inode->i_cdev); >> + >> + put_device(&ctrldev->dev); >> + >> + return 0; >> +} >> + >> +static long rpmsg_ctrl_ioctl(struct file *fp, unsigned int cmd, unsigned long arg) >> +{ >> + struct rpmsg_ctrl *ctrldev = fp->private_data; >> + void __user *argp = (void __user *)arg; >> + struct rpmsg_endpoint_info eptinfo; >> + struct rpmsg_channel_info chinfo; >> + >> + if (cmd != RPMSG_CREATE_EPT_IOCTL) >> + return -EINVAL; >> + >> + if (copy_from_user(&eptinfo, argp, sizeof(eptinfo))) >> + return -EFAULT; >> + >> + memcpy(chinfo.name, eptinfo.name, RPMSG_NAME_SIZE); >> + chinfo.name[RPMSG_NAME_SIZE - 1] = '\0'; >> + chinfo.src = eptinfo.src; >> + chinfo.dst = eptinfo.dst; >> + >> + return rpmsg_chrdev_create_eptdev(ctrldev->rpdev, &ctrldev->dev, chinfo); >> +}; >> + >> +static const struct file_operations rpmsg_ctrl_fops = { >> + .owner = THIS_MODULE, >> + .open = rpmsg_ctrl_open, >> + .release = rpmsg_ctrl_release, >> + .unlocked_ioctl = rpmsg_ctrl_ioctl, >> + .compat_ioctl = compat_ptr_ioctl, >> +}; >> + >> +static void rpmsg_ctrl_release_device(struct device *dev) >> +{ >> + struct rpmsg_ctrl *ctrldev = dev_to_ctrldev(dev); >> + >> + ida_simple_remove(&rpmsg_ctrl_ida, dev->id); >> + ida_simple_remove(&rpmsg_minor_ida, MINOR(dev->devt)); >> + cdev_del(&ctrldev->cdev); >> + kfree(ctrldev); >> +} >> + >> +static int rpmsg_ctrl_probe(struct rpmsg_device *rpdev) >> +{ >> + struct rpmsg_ctrl *ctrldev; >> + struct device *dev; >> + int ret; >> + >> + ctrldev = kzalloc(sizeof(*ctrldev), GFP_KERNEL); >> + if (!ctrldev) >> + return -ENOMEM; >> + >> + ctrldev->rpdev = rpdev; >> + >> + dev = &ctrldev->dev; >> + device_initialize(dev); >> + dev->parent = &rpdev->dev; >> + >> + cdev_init(&ctrldev->cdev, &rpmsg_ctrl_fops); >> + ctrldev->cdev.owner = THIS_MODULE; >> + >> + ret = ida_simple_get(&rpmsg_minor_ida, 0, RPMSG_DEV_MAX, GFP_KERNEL); >> + if (ret < 0) >> + goto free_ctrldev; >> + dev->devt = MKDEV(MAJOR(rpmsg_major), ret); >> + >> + ret = ida_simple_get(&rpmsg_ctrl_ida, 0, 0, GFP_KERNEL); >> + if (ret < 0) >> + goto free_minor_ida; >> + dev->id = ret; >> + dev_set_name(&ctrldev->dev, "rpmsg_ctrl%d", ret); >> + >> + ret = cdev_add(&ctrldev->cdev, dev->devt, 1); >> + if (ret) >> + goto free_ctrl_ida; >> + >> + /* We can now rely on the release function for cleanup */ >> + dev->release = rpmsg_ctrl_release_device; >> + >> + ret = device_add(dev); >> + if (ret) { >> + dev_err(&rpdev->dev, "device_add failed: %d\n", ret); >> + put_device(dev); >> + } >> + >> + dev_set_drvdata(&rpdev->dev, ctrldev); >> + >> + return ret; >> + >> +free_ctrl_ida: >> + ida_simple_remove(&rpmsg_ctrl_ida, dev->id); >> +free_minor_ida: >> + ida_simple_remove(&rpmsg_minor_ida, MINOR(dev->devt)); >> +free_ctrldev: >> + put_device(dev); >> + kfree(ctrldev); >> + >> + return ret; >> +} >> + >> +static void rpmsg_ctrl_remove(struct rpmsg_device *rpdev) >> +{ >> + struct rpmsg_ctrl *ctrldev = dev_get_drvdata(&rpdev->dev); >> + int ret; >> + >> + /* Destroy all endpoints */ >> + ret = device_for_each_child(&ctrldev->dev, NULL, >> + rpmsg_chrdev_eptdev_destroy); >> + if (ret) >> + dev_warn(&rpdev->dev, "failed to nuke endpoints: %d\n", ret); >> + >> + device_del(&ctrldev->dev); >> + put_device(&ctrldev->dev); >> +} >> + >> +static struct rpmsg_driver rpmsg_ctrl_driver = { >> + .probe = rpmsg_ctrl_probe, >> + .remove = rpmsg_ctrl_remove, >> + .drv = { >> + .name = "rpmsg_chrdev", >> + }, >> +}; >> + >> +static int rpmsg_ctrl_init(void) >> +{ >> + int ret; >> + >> + ret = alloc_chrdev_region(&rpmsg_major, 0, RPMSG_DEV_MAX, "rpmsg"); >> + if (ret < 0) { >> + pr_err("rpmsg: failed to allocate char dev region\n"); >> + return ret; >> + } >> + >> + ret = register_rpmsg_driver(&rpmsg_ctrl_driver); >> + if (ret < 0) { >> + pr_err("rpmsg ctrl: failed to register rpmsg driver\n"); >> + unregister_chrdev_region(rpmsg_major, RPMSG_DEV_MAX); >> + } >> + >> + return ret; >> +} >> +postcore_initcall(rpmsg_ctrl_init); >> + >> +static void rpmsg_ctrl_exit(void) >> +{ >> + unregister_rpmsg_driver(&rpmsg_ctrl_driver); >> + unregister_chrdev_region(rpmsg_major, RPMSG_DEV_MAX); >> +} >> +module_exit(rpmsg_ctrl_exit); >> + >> +MODULE_DESCRIPTION("rpmsg control interface"); >> +MODULE_ALIAS("rpmsg:" KBUILD_MODNAME); >> +MODULE_LICENSE("GPL v2"); >> -- >> 2.17.1 >>
On Wed, Mar 03, 2021 at 03:59:34PM +0100, Arnaud POULIQUEN wrote: > > > On 3/2/21 7:35 PM, Mathieu Poirier wrote: > > On Fri, Feb 19, 2021 at 12:14:51PM +0100, Arnaud Pouliquen wrote: > >> Move the code related to the rpmsg_ctrl char device to the new > >> rpmsg_ctrl.c module. > >> Manage the dependency in the kconfig. > >> > >> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com> > >> --- > >> drivers/rpmsg/Kconfig | 9 ++ > >> drivers/rpmsg/Makefile | 1 + > >> drivers/rpmsg/rpmsg_char.c | 163 ---------------------------- > >> drivers/rpmsg/rpmsg_ctrl.c | 216 +++++++++++++++++++++++++++++++++++++ > >> 4 files changed, 226 insertions(+), 163 deletions(-) > >> create mode 100644 drivers/rpmsg/rpmsg_ctrl.c > >> > >> diff --git a/drivers/rpmsg/Kconfig b/drivers/rpmsg/Kconfig > >> index 0b4407abdf13..2d0cd7fdd710 100644 > >> --- a/drivers/rpmsg/Kconfig > >> +++ b/drivers/rpmsg/Kconfig > >> @@ -10,11 +10,20 @@ config RPMSG_CHAR > >> tristate "RPMSG device interface" > >> depends on RPMSG > >> depends on NET > >> + select RPMSG_CTRL > >> help > >> Say Y here to export rpmsg endpoints as device files, usually found > >> in /dev. They make it possible for user-space programs to send and > >> receive rpmsg packets. > >> > >> +config RPMSG_CTRL > >> + tristate "RPMSG control interface" > >> + depends on RPMSG > >> + help > >> + Say Y here to enable the support of the /dev/rpmsg_ctlX API. This API > > > > s/rpmsg_ctlX/rpmsg_ctrlX > > Good catch! > > > > >> + allows user-space programs to create endpoints with specific service name, > >> + source and destination addresses. > >> + > >> config RPMSG_NS > >> tristate "RPMSG name service announcement" > >> depends on RPMSG > >> diff --git a/drivers/rpmsg/Makefile b/drivers/rpmsg/Makefile > >> index 8d452656f0ee..58e3b382e316 100644 > >> --- a/drivers/rpmsg/Makefile > >> +++ b/drivers/rpmsg/Makefile > >> @@ -1,6 +1,7 @@ > >> # SPDX-License-Identifier: GPL-2.0 > >> obj-$(CONFIG_RPMSG) += rpmsg_core.o > >> obj-$(CONFIG_RPMSG_CHAR) += rpmsg_char.o > >> +obj-$(CONFIG_RPMSG_CTRL) += rpmsg_ctrl.o > >> obj-$(CONFIG_RPMSG_NS) += rpmsg_ns.o > >> obj-$(CONFIG_RPMSG_MTK_SCP) += mtk_rpmsg.o > >> qcom_glink-objs := qcom_glink_native.o qcom_glink_ssr.o > >> diff --git a/drivers/rpmsg/rpmsg_char.c b/drivers/rpmsg/rpmsg_char.c > >> index 23e369a00531..83c10b39b139 100644 > >> --- a/drivers/rpmsg/rpmsg_char.c > >> +++ b/drivers/rpmsg/rpmsg_char.c > >> @@ -31,28 +31,12 @@ > >> static dev_t rpmsg_major; > >> static struct class *rpmsg_class; > >> > >> -static DEFINE_IDA(rpmsg_ctrl_ida); > >> static DEFINE_IDA(rpmsg_ept_ida); > >> static DEFINE_IDA(rpmsg_minor_ida); > >> > >> #define dev_to_eptdev(dev) container_of(dev, struct rpmsg_eptdev, dev) > >> #define cdev_to_eptdev(i_cdev) container_of(i_cdev, struct rpmsg_eptdev, cdev) > >> > >> -#define dev_to_ctrldev(dev) container_of(dev, struct rpmsg_ctrldev, dev) > >> -#define cdev_to_ctrldev(i_cdev) container_of(i_cdev, struct rpmsg_ctrldev, cdev) > >> - > >> -/** > >> - * struct rpmsg_ctrldev - control device for instantiating endpoint devices > >> - * @rpdev: underlaying rpmsg device > >> - * @cdev: cdev for the ctrl device > >> - * @dev: device for the ctrl device > >> - */ > >> -struct rpmsg_ctrldev { > >> - struct rpmsg_device *rpdev; > >> - struct cdev cdev; > >> - struct device dev; > >> -}; > > > > This showed up in rpmsg_ctrl.c as rpmsg_ctrl. The same goes for many functions > > names - they are removed here and re-introduced under a different name, which > > makes it very hard to follow. What ends up in the new file should be a carbon > > copy of what was moved. > > Ok i will split it in 2 steps. In most cases I don't think there is a need for a wholesale renaming exercise. To me having a struct rpmsg_ctrldev and functions names such as rpmsg_ctrldev_open() in a file called rpmsg_ctrl.c is perfectly acceptable. > > Thanks > Arnaud > > > > > I'm out of time for today, more comments tomorrow. > > > > Thanks, > > Mathieu > > > >> - > >> /** > >> * struct rpmsg_eptdev - endpoint device context > >> * @dev: endpoint device > >> @@ -411,145 +395,6 @@ int rpmsg_chrdev_create_eptdev(struct rpmsg_device *rpdev, struct device *parent > >> } > >> EXPORT_SYMBOL(rpmsg_chrdev_create_eptdev); > >> > >> -static int rpmsg_ctrldev_open(struct inode *inode, struct file *filp) > >> -{ > >> - struct rpmsg_ctrldev *ctrldev = cdev_to_ctrldev(inode->i_cdev); > >> - > >> - get_device(&ctrldev->dev); > >> - filp->private_data = ctrldev; > >> - > >> - return 0; > >> -} > >> - > >> -static int rpmsg_ctrldev_release(struct inode *inode, struct file *filp) > >> -{ > >> - struct rpmsg_ctrldev *ctrldev = cdev_to_ctrldev(inode->i_cdev); > >> - > >> - put_device(&ctrldev->dev); > >> - > >> - return 0; > >> -} > >> - > >> -static long rpmsg_ctrldev_ioctl(struct file *fp, unsigned int cmd, > >> - unsigned long arg) > >> -{ > >> - struct rpmsg_ctrldev *ctrldev = fp->private_data; > >> - void __user *argp = (void __user *)arg; > >> - struct rpmsg_endpoint_info eptinfo; > >> - struct rpmsg_channel_info chinfo; > >> - > >> - if (cmd != RPMSG_CREATE_EPT_IOCTL) > >> - return -EINVAL; > >> - > >> - if (copy_from_user(&eptinfo, argp, sizeof(eptinfo))) > >> - return -EFAULT; > >> - > >> - memcpy(chinfo.name, eptinfo.name, RPMSG_NAME_SIZE); > >> - chinfo.name[RPMSG_NAME_SIZE-1] = '\0'; > >> - chinfo.src = eptinfo.src; > >> - chinfo.dst = eptinfo.dst; > >> - > >> - return rpmsg_chrdev_create_eptdev(ctrldev->rpdev, &ctrldev->dev, chinfo); > >> -}; > >> - > >> -static const struct file_operations rpmsg_ctrldev_fops = { > >> - .owner = THIS_MODULE, > >> - .open = rpmsg_ctrldev_open, > >> - .release = rpmsg_ctrldev_release, > >> - .unlocked_ioctl = rpmsg_ctrldev_ioctl, > >> - .compat_ioctl = compat_ptr_ioctl, > >> -}; > >> - > >> -static void rpmsg_ctrldev_release_device(struct device *dev) > >> -{ > >> - struct rpmsg_ctrldev *ctrldev = dev_to_ctrldev(dev); > >> - > >> - ida_simple_remove(&rpmsg_ctrl_ida, dev->id); > >> - ida_simple_remove(&rpmsg_minor_ida, MINOR(dev->devt)); > >> - cdev_del(&ctrldev->cdev); > >> - kfree(ctrldev); > >> -} > >> - > >> -static int rpmsg_chrdev_probe(struct rpmsg_device *rpdev) > >> -{ > >> - struct rpmsg_ctrldev *ctrldev; > >> - struct device *dev; > >> - int ret; > >> - > >> - ctrldev = kzalloc(sizeof(*ctrldev), GFP_KERNEL); > >> - if (!ctrldev) > >> - return -ENOMEM; > >> - > >> - ctrldev->rpdev = rpdev; > >> - > >> - dev = &ctrldev->dev; > >> - device_initialize(dev); > >> - dev->parent = &rpdev->dev; > >> - > >> - cdev_init(&ctrldev->cdev, &rpmsg_ctrldev_fops); > >> - ctrldev->cdev.owner = THIS_MODULE; > >> - > >> - ret = ida_simple_get(&rpmsg_minor_ida, 0, RPMSG_DEV_MAX, GFP_KERNEL); > >> - if (ret < 0) > >> - goto free_ctrldev; > >> - dev->devt = MKDEV(MAJOR(rpmsg_major), ret); > >> - > >> - ret = ida_simple_get(&rpmsg_ctrl_ida, 0, 0, GFP_KERNEL); > >> - if (ret < 0) > >> - goto free_minor_ida; > >> - dev->id = ret; > >> - dev_set_name(&ctrldev->dev, "rpmsg_ctrl%d", ret); > >> - > >> - ret = cdev_add(&ctrldev->cdev, dev->devt, 1); > >> - if (ret) > >> - goto free_ctrl_ida; > >> - > >> - /* We can now rely on the release function for cleanup */ > >> - dev->release = rpmsg_ctrldev_release_device; > >> - > >> - ret = device_add(dev); > >> - if (ret) { > >> - dev_err(&rpdev->dev, "device_add failed: %d\n", ret); > >> - put_device(dev); > >> - } > >> - > >> - dev_set_drvdata(&rpdev->dev, ctrldev); > >> - > >> - return ret; > >> - > >> -free_ctrl_ida: > >> - ida_simple_remove(&rpmsg_ctrl_ida, dev->id); > >> -free_minor_ida: > >> - ida_simple_remove(&rpmsg_minor_ida, MINOR(dev->devt)); > >> -free_ctrldev: > >> - put_device(dev); > >> - kfree(ctrldev); > >> - > >> - return ret; > >> -} > >> - > >> -static void rpmsg_chrdev_remove(struct rpmsg_device *rpdev) > >> -{ > >> - struct rpmsg_ctrldev *ctrldev = dev_get_drvdata(&rpdev->dev); > >> - int ret; > >> - > >> - /* Destroy all endpoints */ > >> - ret = device_for_each_child(&ctrldev->dev, NULL, rpmsg_chrdev_eptdev_destroy); > >> - if (ret) > >> - dev_warn(&rpdev->dev, "failed to nuke endpoints: %d\n", ret); > >> - > >> - device_del(&ctrldev->dev); > >> - put_device(&ctrldev->dev); > >> -} > >> - > >> -static struct rpmsg_driver rpmsg_chrdev_driver = { > >> - .probe = rpmsg_chrdev_probe, > >> - .remove = rpmsg_chrdev_remove, > >> - .drv = { > >> - .name = "rpmsg_chrdev", > >> - }, > >> -}; > >> - > >> static int rpmsg_chrdev_init(void) > >> { > >> int ret; > >> @@ -567,20 +412,12 @@ static int rpmsg_chrdev_init(void) > >> return PTR_ERR(rpmsg_class); > >> } > >> > >> - ret = register_rpmsg_driver(&rpmsg_chrdev_driver); > >> - if (ret < 0) { > >> - pr_err("rpmsgchr: failed to register rpmsg driver\n"); > >> - class_destroy(rpmsg_class); > >> - unregister_chrdev_region(rpmsg_major, RPMSG_DEV_MAX); > >> - } > >> - > >> return ret; > >> } > >> postcore_initcall(rpmsg_chrdev_init); > >> > >> static void rpmsg_chrdev_exit(void) > >> { > >> - unregister_rpmsg_driver(&rpmsg_chrdev_driver); > >> class_destroy(rpmsg_class); > >> unregister_chrdev_region(rpmsg_major, RPMSG_DEV_MAX); > >> } > >> diff --git a/drivers/rpmsg/rpmsg_ctrl.c b/drivers/rpmsg/rpmsg_ctrl.c > >> new file mode 100644 > >> index 000000000000..fa05b67d24da > >> --- /dev/null > >> +++ b/drivers/rpmsg/rpmsg_ctrl.c > >> @@ -0,0 +1,216 @@ > >> +// SPDX-License-Identifier: GPL-2.0 > >> +/* > >> + * Copyright (C) 2021, STMicroelectronics > >> + * Copyright (c) 2016, Linaro Ltd. > >> + * Copyright (c) 2012, Michal Simek <monstr@monstr.eu> > >> + * Copyright (c) 2012, PetaLogix > >> + * Copyright (c) 2011, Texas Instruments, Inc. > >> + * Copyright (c) 2011, Google, Inc. > >> + * > >> + * Based on rpmsg performance statistics driver by Michal Simek, which in turn > >> + * was based on TI & Google OMX rpmsg driver. > >> + */ > >> +#include <linux/cdev.h> > >> +#include <linux/device.h> > >> +#include <linux/fs.h> > >> +#include <linux/idr.h> > >> +#include <linux/kernel.h> > >> +#include <linux/module.h> > >> +#include <linux/rpmsg.h> > >> +#include <linux/slab.h> > >> +#include <uapi/linux/rpmsg.h> > >> + > >> +#include "rpmsg_char.h" > >> +#include "rpmsg_internal.h" > >> + > >> +#define RPMSG_DEV_MAX (MINORMASK + 1) > >> + > >> +static dev_t rpmsg_major; > >> + > >> +static DEFINE_IDA(rpmsg_ctrl_ida); > >> +static DEFINE_IDA(rpmsg_minor_ida); > >> + > >> +#define dev_to_ctrldev(dev) container_of(dev, struct rpmsg_ctrl, dev) > >> +#define cdev_to_ctrldev(i_cdev) container_of(i_cdev, struct rpmsg_ctrl, cdev) > >> + > >> +/** > >> + * struct rpmsg_ctrl - control device for instantiating endpoint devices > >> + * @rpdev: underlaying rpmsg device > >> + * @cdev: cdev for the ctrl device > >> + * @dev: device for the ctrl device > >> + */ > >> +struct rpmsg_ctrl { > >> + struct rpmsg_device *rpdev; > >> + struct cdev cdev; > >> + struct device dev; > >> +}; > >> + > >> +static int rpmsg_ctrl_open(struct inode *inode, struct file *filp) > >> +{ > >> + struct rpmsg_ctrl *ctrldev = cdev_to_ctrldev(inode->i_cdev); > >> + > >> + get_device(&ctrldev->dev); > >> + filp->private_data = ctrldev; > >> + > >> + return 0; > >> +} > >> + > >> +static int rpmsg_ctrl_release(struct inode *inode, struct file *filp) > >> +{ > >> + struct rpmsg_ctrl *ctrldev = cdev_to_ctrldev(inode->i_cdev); > >> + > >> + put_device(&ctrldev->dev); > >> + > >> + return 0; > >> +} > >> + > >> +static long rpmsg_ctrl_ioctl(struct file *fp, unsigned int cmd, unsigned long arg) > >> +{ > >> + struct rpmsg_ctrl *ctrldev = fp->private_data; > >> + void __user *argp = (void __user *)arg; > >> + struct rpmsg_endpoint_info eptinfo; > >> + struct rpmsg_channel_info chinfo; > >> + > >> + if (cmd != RPMSG_CREATE_EPT_IOCTL) > >> + return -EINVAL; > >> + > >> + if (copy_from_user(&eptinfo, argp, sizeof(eptinfo))) > >> + return -EFAULT; > >> + > >> + memcpy(chinfo.name, eptinfo.name, RPMSG_NAME_SIZE); > >> + chinfo.name[RPMSG_NAME_SIZE - 1] = '\0'; > >> + chinfo.src = eptinfo.src; > >> + chinfo.dst = eptinfo.dst; > >> + > >> + return rpmsg_chrdev_create_eptdev(ctrldev->rpdev, &ctrldev->dev, chinfo); > >> +}; > >> + > >> +static const struct file_operations rpmsg_ctrl_fops = { > >> + .owner = THIS_MODULE, > >> + .open = rpmsg_ctrl_open, > >> + .release = rpmsg_ctrl_release, > >> + .unlocked_ioctl = rpmsg_ctrl_ioctl, > >> + .compat_ioctl = compat_ptr_ioctl, > >> +}; > >> + > >> +static void rpmsg_ctrl_release_device(struct device *dev) > >> +{ > >> + struct rpmsg_ctrl *ctrldev = dev_to_ctrldev(dev); > >> + > >> + ida_simple_remove(&rpmsg_ctrl_ida, dev->id); > >> + ida_simple_remove(&rpmsg_minor_ida, MINOR(dev->devt)); > >> + cdev_del(&ctrldev->cdev); > >> + kfree(ctrldev); > >> +} > >> + > >> +static int rpmsg_ctrl_probe(struct rpmsg_device *rpdev) > >> +{ > >> + struct rpmsg_ctrl *ctrldev; > >> + struct device *dev; > >> + int ret; > >> + > >> + ctrldev = kzalloc(sizeof(*ctrldev), GFP_KERNEL); > >> + if (!ctrldev) > >> + return -ENOMEM; > >> + > >> + ctrldev->rpdev = rpdev; > >> + > >> + dev = &ctrldev->dev; > >> + device_initialize(dev); > >> + dev->parent = &rpdev->dev; > >> + > >> + cdev_init(&ctrldev->cdev, &rpmsg_ctrl_fops); > >> + ctrldev->cdev.owner = THIS_MODULE; > >> + > >> + ret = ida_simple_get(&rpmsg_minor_ida, 0, RPMSG_DEV_MAX, GFP_KERNEL); > >> + if (ret < 0) > >> + goto free_ctrldev; > >> + dev->devt = MKDEV(MAJOR(rpmsg_major), ret); > >> + > >> + ret = ida_simple_get(&rpmsg_ctrl_ida, 0, 0, GFP_KERNEL); > >> + if (ret < 0) > >> + goto free_minor_ida; > >> + dev->id = ret; > >> + dev_set_name(&ctrldev->dev, "rpmsg_ctrl%d", ret); > >> + > >> + ret = cdev_add(&ctrldev->cdev, dev->devt, 1); > >> + if (ret) > >> + goto free_ctrl_ida; > >> + > >> + /* We can now rely on the release function for cleanup */ > >> + dev->release = rpmsg_ctrl_release_device; > >> + > >> + ret = device_add(dev); > >> + if (ret) { > >> + dev_err(&rpdev->dev, "device_add failed: %d\n", ret); > >> + put_device(dev); > >> + } > >> + > >> + dev_set_drvdata(&rpdev->dev, ctrldev); > >> + > >> + return ret; > >> + > >> +free_ctrl_ida: > >> + ida_simple_remove(&rpmsg_ctrl_ida, dev->id); > >> +free_minor_ida: > >> + ida_simple_remove(&rpmsg_minor_ida, MINOR(dev->devt)); > >> +free_ctrldev: > >> + put_device(dev); > >> + kfree(ctrldev); > >> + > >> + return ret; > >> +} > >> + > >> +static void rpmsg_ctrl_remove(struct rpmsg_device *rpdev) > >> +{ > >> + struct rpmsg_ctrl *ctrldev = dev_get_drvdata(&rpdev->dev); > >> + int ret; > >> + > >> + /* Destroy all endpoints */ > >> + ret = device_for_each_child(&ctrldev->dev, NULL, > >> + rpmsg_chrdev_eptdev_destroy); > >> + if (ret) > >> + dev_warn(&rpdev->dev, "failed to nuke endpoints: %d\n", ret); > >> + > >> + device_del(&ctrldev->dev); > >> + put_device(&ctrldev->dev); > >> +} > >> + > >> +static struct rpmsg_driver rpmsg_ctrl_driver = { > >> + .probe = rpmsg_ctrl_probe, > >> + .remove = rpmsg_ctrl_remove, > >> + .drv = { > >> + .name = "rpmsg_chrdev", > >> + }, > >> +}; > >> + > >> +static int rpmsg_ctrl_init(void) > >> +{ > >> + int ret; > >> + > >> + ret = alloc_chrdev_region(&rpmsg_major, 0, RPMSG_DEV_MAX, "rpmsg"); > >> + if (ret < 0) { > >> + pr_err("rpmsg: failed to allocate char dev region\n"); > >> + return ret; > >> + } > >> + > >> + ret = register_rpmsg_driver(&rpmsg_ctrl_driver); > >> + if (ret < 0) { > >> + pr_err("rpmsg ctrl: failed to register rpmsg driver\n"); > >> + unregister_chrdev_region(rpmsg_major, RPMSG_DEV_MAX); > >> + } > >> + > >> + return ret; > >> +} > >> +postcore_initcall(rpmsg_ctrl_init); > >> + > >> +static void rpmsg_ctrl_exit(void) > >> +{ > >> + unregister_rpmsg_driver(&rpmsg_ctrl_driver); > >> + unregister_chrdev_region(rpmsg_major, RPMSG_DEV_MAX); > >> +} > >> +module_exit(rpmsg_ctrl_exit); > >> + > >> +MODULE_DESCRIPTION("rpmsg control interface"); > >> +MODULE_ALIAS("rpmsg:" KBUILD_MODNAME); > >> +MODULE_LICENSE("GPL v2"); > >> -- > >> 2.17.1 > >>
diff --git a/drivers/rpmsg/Kconfig b/drivers/rpmsg/Kconfig index 0b4407abdf13..2d0cd7fdd710 100644 --- a/drivers/rpmsg/Kconfig +++ b/drivers/rpmsg/Kconfig @@ -10,11 +10,20 @@ config RPMSG_CHAR tristate "RPMSG device interface" depends on RPMSG depends on NET + select RPMSG_CTRL help Say Y here to export rpmsg endpoints as device files, usually found in /dev. They make it possible for user-space programs to send and receive rpmsg packets. +config RPMSG_CTRL + tristate "RPMSG control interface" + depends on RPMSG + help + Say Y here to enable the support of the /dev/rpmsg_ctlX API. This API + allows user-space programs to create endpoints with specific service name, + source and destination addresses. + config RPMSG_NS tristate "RPMSG name service announcement" depends on RPMSG diff --git a/drivers/rpmsg/Makefile b/drivers/rpmsg/Makefile index 8d452656f0ee..58e3b382e316 100644 --- a/drivers/rpmsg/Makefile +++ b/drivers/rpmsg/Makefile @@ -1,6 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 obj-$(CONFIG_RPMSG) += rpmsg_core.o obj-$(CONFIG_RPMSG_CHAR) += rpmsg_char.o +obj-$(CONFIG_RPMSG_CTRL) += rpmsg_ctrl.o obj-$(CONFIG_RPMSG_NS) += rpmsg_ns.o obj-$(CONFIG_RPMSG_MTK_SCP) += mtk_rpmsg.o qcom_glink-objs := qcom_glink_native.o qcom_glink_ssr.o diff --git a/drivers/rpmsg/rpmsg_char.c b/drivers/rpmsg/rpmsg_char.c index 23e369a00531..83c10b39b139 100644 --- a/drivers/rpmsg/rpmsg_char.c +++ b/drivers/rpmsg/rpmsg_char.c @@ -31,28 +31,12 @@ static dev_t rpmsg_major; static struct class *rpmsg_class; -static DEFINE_IDA(rpmsg_ctrl_ida); static DEFINE_IDA(rpmsg_ept_ida); static DEFINE_IDA(rpmsg_minor_ida); #define dev_to_eptdev(dev) container_of(dev, struct rpmsg_eptdev, dev) #define cdev_to_eptdev(i_cdev) container_of(i_cdev, struct rpmsg_eptdev, cdev) -#define dev_to_ctrldev(dev) container_of(dev, struct rpmsg_ctrldev, dev) -#define cdev_to_ctrldev(i_cdev) container_of(i_cdev, struct rpmsg_ctrldev, cdev) - -/** - * struct rpmsg_ctrldev - control device for instantiating endpoint devices - * @rpdev: underlaying rpmsg device - * @cdev: cdev for the ctrl device - * @dev: device for the ctrl device - */ -struct rpmsg_ctrldev { - struct rpmsg_device *rpdev; - struct cdev cdev; - struct device dev; -}; - /** * struct rpmsg_eptdev - endpoint device context * @dev: endpoint device @@ -411,145 +395,6 @@ int rpmsg_chrdev_create_eptdev(struct rpmsg_device *rpdev, struct device *parent } EXPORT_SYMBOL(rpmsg_chrdev_create_eptdev); -static int rpmsg_ctrldev_open(struct inode *inode, struct file *filp) -{ - struct rpmsg_ctrldev *ctrldev = cdev_to_ctrldev(inode->i_cdev); - - get_device(&ctrldev->dev); - filp->private_data = ctrldev; - - return 0; -} - -static int rpmsg_ctrldev_release(struct inode *inode, struct file *filp) -{ - struct rpmsg_ctrldev *ctrldev = cdev_to_ctrldev(inode->i_cdev); - - put_device(&ctrldev->dev); - - return 0; -} - -static long rpmsg_ctrldev_ioctl(struct file *fp, unsigned int cmd, - unsigned long arg) -{ - struct rpmsg_ctrldev *ctrldev = fp->private_data; - void __user *argp = (void __user *)arg; - struct rpmsg_endpoint_info eptinfo; - struct rpmsg_channel_info chinfo; - - if (cmd != RPMSG_CREATE_EPT_IOCTL) - return -EINVAL; - - if (copy_from_user(&eptinfo, argp, sizeof(eptinfo))) - return -EFAULT; - - memcpy(chinfo.name, eptinfo.name, RPMSG_NAME_SIZE); - chinfo.name[RPMSG_NAME_SIZE-1] = '\0'; - chinfo.src = eptinfo.src; - chinfo.dst = eptinfo.dst; - - return rpmsg_chrdev_create_eptdev(ctrldev->rpdev, &ctrldev->dev, chinfo); -}; - -static const struct file_operations rpmsg_ctrldev_fops = { - .owner = THIS_MODULE, - .open = rpmsg_ctrldev_open, - .release = rpmsg_ctrldev_release, - .unlocked_ioctl = rpmsg_ctrldev_ioctl, - .compat_ioctl = compat_ptr_ioctl, -}; - -static void rpmsg_ctrldev_release_device(struct device *dev) -{ - struct rpmsg_ctrldev *ctrldev = dev_to_ctrldev(dev); - - ida_simple_remove(&rpmsg_ctrl_ida, dev->id); - ida_simple_remove(&rpmsg_minor_ida, MINOR(dev->devt)); - cdev_del(&ctrldev->cdev); - kfree(ctrldev); -} - -static int rpmsg_chrdev_probe(struct rpmsg_device *rpdev) -{ - struct rpmsg_ctrldev *ctrldev; - struct device *dev; - int ret; - - ctrldev = kzalloc(sizeof(*ctrldev), GFP_KERNEL); - if (!ctrldev) - return -ENOMEM; - - ctrldev->rpdev = rpdev; - - dev = &ctrldev->dev; - device_initialize(dev); - dev->parent = &rpdev->dev; - - cdev_init(&ctrldev->cdev, &rpmsg_ctrldev_fops); - ctrldev->cdev.owner = THIS_MODULE; - - ret = ida_simple_get(&rpmsg_minor_ida, 0, RPMSG_DEV_MAX, GFP_KERNEL); - if (ret < 0) - goto free_ctrldev; - dev->devt = MKDEV(MAJOR(rpmsg_major), ret); - - ret = ida_simple_get(&rpmsg_ctrl_ida, 0, 0, GFP_KERNEL); - if (ret < 0) - goto free_minor_ida; - dev->id = ret; - dev_set_name(&ctrldev->dev, "rpmsg_ctrl%d", ret); - - ret = cdev_add(&ctrldev->cdev, dev->devt, 1); - if (ret) - goto free_ctrl_ida; - - /* We can now rely on the release function for cleanup */ - dev->release = rpmsg_ctrldev_release_device; - - ret = device_add(dev); - if (ret) { - dev_err(&rpdev->dev, "device_add failed: %d\n", ret); - put_device(dev); - } - - dev_set_drvdata(&rpdev->dev, ctrldev); - - return ret; - -free_ctrl_ida: - ida_simple_remove(&rpmsg_ctrl_ida, dev->id); -free_minor_ida: - ida_simple_remove(&rpmsg_minor_ida, MINOR(dev->devt)); -free_ctrldev: - put_device(dev); - kfree(ctrldev); - - return ret; -} - -static void rpmsg_chrdev_remove(struct rpmsg_device *rpdev) -{ - struct rpmsg_ctrldev *ctrldev = dev_get_drvdata(&rpdev->dev); - int ret; - - /* Destroy all endpoints */ - ret = device_for_each_child(&ctrldev->dev, NULL, rpmsg_chrdev_eptdev_destroy); - if (ret) - dev_warn(&rpdev->dev, "failed to nuke endpoints: %d\n", ret); - - device_del(&ctrldev->dev); - put_device(&ctrldev->dev); -} - -static struct rpmsg_driver rpmsg_chrdev_driver = { - .probe = rpmsg_chrdev_probe, - .remove = rpmsg_chrdev_remove, - .drv = { - .name = "rpmsg_chrdev", - }, -}; - static int rpmsg_chrdev_init(void) { int ret; @@ -567,20 +412,12 @@ static int rpmsg_chrdev_init(void) return PTR_ERR(rpmsg_class); } - ret = register_rpmsg_driver(&rpmsg_chrdev_driver); - if (ret < 0) { - pr_err("rpmsgchr: failed to register rpmsg driver\n"); - class_destroy(rpmsg_class); - unregister_chrdev_region(rpmsg_major, RPMSG_DEV_MAX); - } - return ret; } postcore_initcall(rpmsg_chrdev_init); static void rpmsg_chrdev_exit(void) { - unregister_rpmsg_driver(&rpmsg_chrdev_driver); class_destroy(rpmsg_class); unregister_chrdev_region(rpmsg_major, RPMSG_DEV_MAX); } diff --git a/drivers/rpmsg/rpmsg_ctrl.c b/drivers/rpmsg/rpmsg_ctrl.c new file mode 100644 index 000000000000..fa05b67d24da --- /dev/null +++ b/drivers/rpmsg/rpmsg_ctrl.c @@ -0,0 +1,216 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2021, STMicroelectronics + * Copyright (c) 2016, Linaro Ltd. + * Copyright (c) 2012, Michal Simek <monstr@monstr.eu> + * Copyright (c) 2012, PetaLogix + * Copyright (c) 2011, Texas Instruments, Inc. + * Copyright (c) 2011, Google, Inc. + * + * Based on rpmsg performance statistics driver by Michal Simek, which in turn + * was based on TI & Google OMX rpmsg driver. + */ +#include <linux/cdev.h> +#include <linux/device.h> +#include <linux/fs.h> +#include <linux/idr.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/rpmsg.h> +#include <linux/slab.h> +#include <uapi/linux/rpmsg.h> + +#include "rpmsg_char.h" +#include "rpmsg_internal.h" + +#define RPMSG_DEV_MAX (MINORMASK + 1) + +static dev_t rpmsg_major; + +static DEFINE_IDA(rpmsg_ctrl_ida); +static DEFINE_IDA(rpmsg_minor_ida); + +#define dev_to_ctrldev(dev) container_of(dev, struct rpmsg_ctrl, dev) +#define cdev_to_ctrldev(i_cdev) container_of(i_cdev, struct rpmsg_ctrl, cdev) + +/** + * struct rpmsg_ctrl - control device for instantiating endpoint devices + * @rpdev: underlaying rpmsg device + * @cdev: cdev for the ctrl device + * @dev: device for the ctrl device + */ +struct rpmsg_ctrl { + struct rpmsg_device *rpdev; + struct cdev cdev; + struct device dev; +}; + +static int rpmsg_ctrl_open(struct inode *inode, struct file *filp) +{ + struct rpmsg_ctrl *ctrldev = cdev_to_ctrldev(inode->i_cdev); + + get_device(&ctrldev->dev); + filp->private_data = ctrldev; + + return 0; +} + +static int rpmsg_ctrl_release(struct inode *inode, struct file *filp) +{ + struct rpmsg_ctrl *ctrldev = cdev_to_ctrldev(inode->i_cdev); + + put_device(&ctrldev->dev); + + return 0; +} + +static long rpmsg_ctrl_ioctl(struct file *fp, unsigned int cmd, unsigned long arg) +{ + struct rpmsg_ctrl *ctrldev = fp->private_data; + void __user *argp = (void __user *)arg; + struct rpmsg_endpoint_info eptinfo; + struct rpmsg_channel_info chinfo; + + if (cmd != RPMSG_CREATE_EPT_IOCTL) + return -EINVAL; + + if (copy_from_user(&eptinfo, argp, sizeof(eptinfo))) + return -EFAULT; + + memcpy(chinfo.name, eptinfo.name, RPMSG_NAME_SIZE); + chinfo.name[RPMSG_NAME_SIZE - 1] = '\0'; + chinfo.src = eptinfo.src; + chinfo.dst = eptinfo.dst; + + return rpmsg_chrdev_create_eptdev(ctrldev->rpdev, &ctrldev->dev, chinfo); +}; + +static const struct file_operations rpmsg_ctrl_fops = { + .owner = THIS_MODULE, + .open = rpmsg_ctrl_open, + .release = rpmsg_ctrl_release, + .unlocked_ioctl = rpmsg_ctrl_ioctl, + .compat_ioctl = compat_ptr_ioctl, +}; + +static void rpmsg_ctrl_release_device(struct device *dev) +{ + struct rpmsg_ctrl *ctrldev = dev_to_ctrldev(dev); + + ida_simple_remove(&rpmsg_ctrl_ida, dev->id); + ida_simple_remove(&rpmsg_minor_ida, MINOR(dev->devt)); + cdev_del(&ctrldev->cdev); + kfree(ctrldev); +} + +static int rpmsg_ctrl_probe(struct rpmsg_device *rpdev) +{ + struct rpmsg_ctrl *ctrldev; + struct device *dev; + int ret; + + ctrldev = kzalloc(sizeof(*ctrldev), GFP_KERNEL); + if (!ctrldev) + return -ENOMEM; + + ctrldev->rpdev = rpdev; + + dev = &ctrldev->dev; + device_initialize(dev); + dev->parent = &rpdev->dev; + + cdev_init(&ctrldev->cdev, &rpmsg_ctrl_fops); + ctrldev->cdev.owner = THIS_MODULE; + + ret = ida_simple_get(&rpmsg_minor_ida, 0, RPMSG_DEV_MAX, GFP_KERNEL); + if (ret < 0) + goto free_ctrldev; + dev->devt = MKDEV(MAJOR(rpmsg_major), ret); + + ret = ida_simple_get(&rpmsg_ctrl_ida, 0, 0, GFP_KERNEL); + if (ret < 0) + goto free_minor_ida; + dev->id = ret; + dev_set_name(&ctrldev->dev, "rpmsg_ctrl%d", ret); + + ret = cdev_add(&ctrldev->cdev, dev->devt, 1); + if (ret) + goto free_ctrl_ida; + + /* We can now rely on the release function for cleanup */ + dev->release = rpmsg_ctrl_release_device; + + ret = device_add(dev); + if (ret) { + dev_err(&rpdev->dev, "device_add failed: %d\n", ret); + put_device(dev); + } + + dev_set_drvdata(&rpdev->dev, ctrldev); + + return ret; + +free_ctrl_ida: + ida_simple_remove(&rpmsg_ctrl_ida, dev->id); +free_minor_ida: + ida_simple_remove(&rpmsg_minor_ida, MINOR(dev->devt)); +free_ctrldev: + put_device(dev); + kfree(ctrldev); + + return ret; +} + +static void rpmsg_ctrl_remove(struct rpmsg_device *rpdev) +{ + struct rpmsg_ctrl *ctrldev = dev_get_drvdata(&rpdev->dev); + int ret; + + /* Destroy all endpoints */ + ret = device_for_each_child(&ctrldev->dev, NULL, + rpmsg_chrdev_eptdev_destroy); + if (ret) + dev_warn(&rpdev->dev, "failed to nuke endpoints: %d\n", ret); + + device_del(&ctrldev->dev); + put_device(&ctrldev->dev); +} + +static struct rpmsg_driver rpmsg_ctrl_driver = { + .probe = rpmsg_ctrl_probe, + .remove = rpmsg_ctrl_remove, + .drv = { + .name = "rpmsg_chrdev", + }, +}; + +static int rpmsg_ctrl_init(void) +{ + int ret; + + ret = alloc_chrdev_region(&rpmsg_major, 0, RPMSG_DEV_MAX, "rpmsg"); + if (ret < 0) { + pr_err("rpmsg: failed to allocate char dev region\n"); + return ret; + } + + ret = register_rpmsg_driver(&rpmsg_ctrl_driver); + if (ret < 0) { + pr_err("rpmsg ctrl: failed to register rpmsg driver\n"); + unregister_chrdev_region(rpmsg_major, RPMSG_DEV_MAX); + } + + return ret; +} +postcore_initcall(rpmsg_ctrl_init); + +static void rpmsg_ctrl_exit(void) +{ + unregister_rpmsg_driver(&rpmsg_ctrl_driver); + unregister_chrdev_region(rpmsg_major, RPMSG_DEV_MAX); +} +module_exit(rpmsg_ctrl_exit); + +MODULE_DESCRIPTION("rpmsg control interface"); +MODULE_ALIAS("rpmsg:" KBUILD_MODNAME); +MODULE_LICENSE("GPL v2");
Move the code related to the rpmsg_ctrl char device to the new rpmsg_ctrl.c module. Manage the dependency in the kconfig. Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com> --- drivers/rpmsg/Kconfig | 9 ++ drivers/rpmsg/Makefile | 1 + drivers/rpmsg/rpmsg_char.c | 163 ---------------------------- drivers/rpmsg/rpmsg_ctrl.c | 216 +++++++++++++++++++++++++++++++++++++ 4 files changed, 226 insertions(+), 163 deletions(-) create mode 100644 drivers/rpmsg/rpmsg_ctrl.c