diff options
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-peci | 16 | ||||
| -rw-r--r-- | drivers/peci/Makefile | 2 | ||||
| -rw-r--r-- | drivers/peci/core.c | 3 | ||||
| -rw-r--r-- | drivers/peci/device.c | 1 | ||||
| -rw-r--r-- | drivers/peci/internal.h | 5 | ||||
| -rw-r--r-- | drivers/peci/sysfs.c | 82 |
6 files changed, 107 insertions, 2 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-peci b/Documentation/ABI/testing/sysfs-bus-peci new file mode 100644 index 000000000000..87454ec5d981 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-peci @@ -0,0 +1,16 @@ +What: /sys/bus/peci/rescan +Date: July 2021 +KernelVersion: 5.18 +Contact: Iwona Winiarska <iwona.winiarska@intel.com> +Description: + Writing a non-zero value to this attribute will + initiate scan for PECI devices on all PECI controllers + in the system. + +What: /sys/bus/peci/devices/<controller_id>-<device_addr>/remove +Date: July 2021 +KernelVersion: 5.18 +Contact: Iwona Winiarska <iwona.winiarska@intel.com> +Description: + Writing a non-zero value to this attribute will + remove the PECI device and any of its children. diff --git a/drivers/peci/Makefile b/drivers/peci/Makefile index c5f9d3fe21bb..917f689e147a 100644 --- a/drivers/peci/Makefile +++ b/drivers/peci/Makefile @@ -1,7 +1,7 @@ # SPDX-License-Identifier: GPL-2.0-only # Core functionality -peci-y := core.o request.o device.o +peci-y := core.o request.o device.o sysfs.o obj-$(CONFIG_PECI) += peci.o # Hardware specific bus drivers diff --git a/drivers/peci/core.c b/drivers/peci/core.c index c3361e6e043a..e993615cf521 100644 --- a/drivers/peci/core.c +++ b/drivers/peci/core.c @@ -29,7 +29,7 @@ struct device_type peci_controller_type = { .release = peci_controller_dev_release, }; -static int peci_controller_scan_devices(struct peci_controller *controller) +int peci_controller_scan_devices(struct peci_controller *controller) { int ret; u8 addr; @@ -162,6 +162,7 @@ EXPORT_SYMBOL_NS_GPL(devm_peci_controller_add, PECI); struct bus_type peci_bus_type = { .name = "peci", + .bus_groups = peci_bus_groups, }; static int __init peci_init(void) diff --git a/drivers/peci/device.c b/drivers/peci/device.c index 2b3a2d893aaf..d10ed1cfcd48 100644 --- a/drivers/peci/device.c +++ b/drivers/peci/device.c @@ -116,5 +116,6 @@ static void peci_device_release(struct device *dev) } struct device_type peci_device_type = { + .groups = peci_device_groups, .release = peci_device_release, }; diff --git a/drivers/peci/internal.h b/drivers/peci/internal.h index 57d11a902c5d..978e12c8e1d3 100644 --- a/drivers/peci/internal.h +++ b/drivers/peci/internal.h @@ -8,6 +8,7 @@ #include <linux/types.h> struct peci_controller; +struct attribute_group; struct peci_device; struct peci_request; @@ -19,12 +20,16 @@ struct peci_request *peci_request_alloc(struct peci_device *device, u8 tx_len, u void peci_request_free(struct peci_request *req); extern struct device_type peci_device_type; +extern const struct attribute_group *peci_device_groups[]; int peci_device_create(struct peci_controller *controller, u8 addr); void peci_device_destroy(struct peci_device *device); extern struct bus_type peci_bus_type; +extern const struct attribute_group *peci_bus_groups[]; extern struct device_type peci_controller_type; +int peci_controller_scan_devices(struct peci_controller *controller); + #endif /* __PECI_INTERNAL_H */ diff --git a/drivers/peci/sysfs.c b/drivers/peci/sysfs.c new file mode 100644 index 000000000000..db9ef05776e3 --- /dev/null +++ b/drivers/peci/sysfs.c @@ -0,0 +1,82 @@ +// SPDX-License-Identifier: GPL-2.0-only +// Copyright (c) 2021 Intel Corporation + +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/peci.h> + +#include "internal.h" + +static int rescan_controller(struct device *dev, void *data) +{ + if (dev->type != &peci_controller_type) + return 0; + + return peci_controller_scan_devices(to_peci_controller(dev)); +} + +static ssize_t rescan_store(struct bus_type *bus, const char *buf, size_t count) +{ + bool res; + int ret; + + ret = kstrtobool(buf, &res); + if (ret) + return ret; + + if (!res) + return count; + + ret = bus_for_each_dev(&peci_bus_type, NULL, NULL, rescan_controller); + if (ret) + return ret; + + return count; +} +static BUS_ATTR_WO(rescan); + +static struct attribute *peci_bus_attrs[] = { + &bus_attr_rescan.attr, + NULL +}; + +static const struct attribute_group peci_bus_group = { + .attrs = peci_bus_attrs, +}; + +const struct attribute_group *peci_bus_groups[] = { + &peci_bus_group, + NULL +}; + +static ssize_t remove_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct peci_device *device = to_peci_device(dev); + bool res; + int ret; + + ret = kstrtobool(buf, &res); + if (ret) + return ret; + + if (res && device_remove_file_self(dev, attr)) + peci_device_destroy(device); + + return count; +} +static DEVICE_ATTR_IGNORE_LOCKDEP(remove, 0200, NULL, remove_store); + +static struct attribute *peci_device_attrs[] = { + &dev_attr_remove.attr, + NULL +}; + +static const struct attribute_group peci_device_group = { + .attrs = peci_device_attrs, +}; + +const struct attribute_group *peci_device_groups[] = { + &peci_device_group, + NULL +}; |