new file mode 100644
@@ -0,0 +1,1273 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Generic netlink for DPLL management framework
+ *
+ * Copyright (c) 2023 Meta Platforms, Inc. and affiliates
+ * Copyright (c) 2023 Intel and affiliates
+ *
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <net/genetlink.h>
+#include "dpll_core.h"
+#include "dpll_nl.h"
+#include <uapi/linux/dpll.h>
+
+#define ASSERT_NOT_NULL(ptr) (WARN_ON(!ptr))
+
+#define xa_for_each_marked_start(xa, index, entry, filter, start) \
+ for (index = start, entry = xa_find(xa, &index, ULONG_MAX, filter); \
+ entry; entry = xa_find_after(xa, &index, ULONG_MAX, filter))
+
+struct dpll_dump_ctx {
+ unsigned long idx;
+};
+
+static struct dpll_dump_ctx *dpll_dump_context(struct netlink_callback *cb)
+{
+ return (struct dpll_dump_ctx *)cb->ctx;
+}
+
+static int
+dpll_msg_add_dev_handle(struct sk_buff *msg, struct dpll_device *dpll)
+{
+ if (nla_put_u32(msg, DPLL_A_ID, dpll->id))
+ return -EMSGSIZE;
+
+ return 0;
+}
+
+/**
+ * dpll_msg_add_pin_handle - attach pin handle attribute to a given message
+ * @msg: pointer to sk_buff message to attach a pin handle
+ * @pin: pin pointer
+ *
+ * Return:
+ * * 0 - success
+ * * -EMSGSIZE - no space in message to attach pin handle
+ */
+int dpll_msg_add_pin_handle(struct sk_buff *msg, struct dpll_pin *pin)
+{
+ if (!pin)
+ return 0;
+ if (nla_put_u32(msg, DPLL_A_PIN_ID, pin->id))
+ return -EMSGSIZE;
+ return 0;
+}
+
+static int
+dpll_msg_add_mode(struct sk_buff *msg, struct dpll_device *dpll,
+ struct netlink_ext_ack *extack)
+{
+ const struct dpll_device_ops *ops = dpll_device_ops(dpll);
+ enum dpll_mode mode;
+ int ret;
+
+ ret = ops->mode_get(dpll, dpll_priv(dpll), &mode, extack);
+ if (ret)
+ return ret;
+ if (nla_put_u8(msg, DPLL_A_MODE, mode))
+ return -EMSGSIZE;
+
+ return 0;
+}
+
+static int
+dpll_msg_add_mode_supported(struct sk_buff *msg, struct dpll_device *dpll,
+ struct netlink_ext_ack *extack)
+{
+ const struct dpll_device_ops *ops = dpll_device_ops(dpll);
+ enum dpll_mode mode;
+
+ if (!ops->mode_supported)
+ return 0;
+ for (mode = DPLL_MODE_MANUAL; mode <= DPLL_MODE_MAX; mode++)
+ if (ops->mode_supported(dpll, dpll_priv(dpll), mode, extack))
+ if (nla_put_u8(msg, DPLL_A_MODE_SUPPORTED, mode))
+ return -EMSGSIZE;
+
+ return 0;
+}
+
+static int
+dpll_msg_add_lock_status(struct sk_buff *msg, struct dpll_device *dpll,
+ struct netlink_ext_ack *extack)
+{
+ const struct dpll_device_ops *ops = dpll_device_ops(dpll);
+ enum dpll_lock_status status;
+ int ret;
+
+ ret = ops->lock_status_get(dpll, dpll_priv(dpll), &status, extack);
+ if (ret)
+ return ret;
+ if (nla_put_u8(msg, DPLL_A_LOCK_STATUS, status))
+ return -EMSGSIZE;
+
+ return 0;
+}
+
+static int
+dpll_msg_add_temp(struct sk_buff *msg, struct dpll_device *dpll,
+ struct netlink_ext_ack *extack)
+{
+ const struct dpll_device_ops *ops = dpll_device_ops(dpll);
+ s32 temp;
+ int ret;
+
+ if (!ops->temp_get)
+ return 0;
+ ret = ops->temp_get(dpll, dpll_priv(dpll), &temp, extack);
+ if (ret)
+ return ret;
+ if (nla_put_s32(msg, DPLL_A_TEMP, temp))
+ return -EMSGSIZE;
+
+ return 0;
+}
+
+static int
+dpll_msg_add_pin_prio(struct sk_buff *msg, struct dpll_pin *pin,
+ struct dpll_pin_ref *ref,
+ struct netlink_ext_ack *extack)
+{
+ const struct dpll_pin_ops *ops = dpll_pin_ops(ref);
+ struct dpll_device *dpll = ref->dpll;
+ u32 prio;
+ int ret;
+
+ if (!ops->prio_get)
+ return 0;
+ ret = ops->prio_get(pin, dpll_pin_on_dpll_priv(dpll, pin), dpll,
+ dpll_priv(dpll), &prio, extack);
+ if (ret)
+ return ret;
+ if (nla_put_u32(msg, DPLL_A_PIN_PRIO, prio))
+ return -EMSGSIZE;
+
+ return 0;
+}
+
+static int
+dpll_msg_add_pin_on_dpll_state(struct sk_buff *msg, struct dpll_pin *pin,
+ struct dpll_pin_ref *ref,
+ struct netlink_ext_ack *extack)
+{
+ const struct dpll_pin_ops *ops = dpll_pin_ops(ref);
+ struct dpll_device *dpll = ref->dpll;
+ enum dpll_pin_state state;
+ int ret;
+
+
+ if (!ops->state_on_dpll_get)
+ return 0;
+ ret = ops->state_on_dpll_get(pin, dpll_pin_on_dpll_priv(dpll, pin),
+ dpll, dpll_priv(dpll), &state, extack);
+ if (ret)
+ return ret;
+ if (nla_put_u8(msg, DPLL_A_PIN_STATE, state))
+ return -EMSGSIZE;
+
+ return 0;
+}
+
+static int
+dpll_msg_add_pin_direction(struct sk_buff *msg, struct dpll_pin *pin,
+ struct dpll_pin_ref *ref,
+ struct netlink_ext_ack *extack)
+{
+ const struct dpll_pin_ops *ops = dpll_pin_ops(ref);
+ struct dpll_device *dpll = ref->dpll;
+ enum dpll_pin_direction direction;
+ int ret;
+
+ ret = ops->direction_get(pin, dpll_pin_on_dpll_priv(dpll, pin), dpll,
+ dpll_priv(dpll), &direction, extack);
+ if (ret)
+ return ret;
+ if (nla_put_u8(msg, DPLL_A_PIN_DIRECTION, direction))
+ return -EMSGSIZE;
+
+ return 0;
+}
+
+static int
+dpll_msg_add_pin_freq(struct sk_buff *msg, struct dpll_pin *pin,
+ struct dpll_pin_ref *ref, struct netlink_ext_ack *extack)
+{
+ const struct dpll_pin_ops *ops = dpll_pin_ops(ref);
+ struct dpll_device *dpll = ref->dpll;
+ struct nlattr *nest;
+ int fs, ret;
+ u64 freq;
+
+ if (!ops->frequency_get)
+ return 0;
+ ret = ops->frequency_get(pin, dpll_pin_on_dpll_priv(dpll, pin), dpll,
+ dpll_priv(dpll), &freq, extack);
+ if (ret)
+ return ret;
+ if (nla_put_64bit(msg, DPLL_A_PIN_FREQUENCY, sizeof(freq), &freq, 0))
+ return -EMSGSIZE;
+ for (fs = 0; fs < pin->prop->freq_supported_num; fs++) {
+ nest = nla_nest_start(msg, DPLL_A_PIN_FREQUENCY_SUPPORTED);
+ if (!nest)
+ return -EMSGSIZE;
+ freq = pin->prop->freq_supported[fs].min;
+ if (nla_put_64bit(msg, DPLL_A_PIN_FREQUENCY_MIN, sizeof(freq),
+ &freq, 0)) {
+ nla_nest_cancel(msg, nest);
+ return -EMSGSIZE;
+ }
+ freq = pin->prop->freq_supported[fs].max;
+ if (nla_put_64bit(msg, DPLL_A_PIN_FREQUENCY_MAX, sizeof(freq),
+ &freq, 0)) {
+ nla_nest_cancel(msg, nest);
+ return -EMSGSIZE;
+ }
+ nla_nest_end(msg, nest);
+ }
+
+ return 0;
+}
+
+static bool dpll_pin_is_freq_supported(struct dpll_pin *pin, u32 freq)
+{
+ int fs;
+
+ for (fs = 0; fs < pin->prop->freq_supported_num; fs++)
+ if (freq >= pin->prop->freq_supported[fs].min &&
+ freq <= pin->prop->freq_supported[fs].max)
+ return true;
+ return false;
+}
+
+static int
+dpll_msg_add_pin_parents(struct sk_buff *msg, struct dpll_pin *pin,
+ struct dpll_pin_ref *dpll_ref,
+ struct netlink_ext_ack *extack)
+{
+ enum dpll_pin_state state;
+ struct dpll_pin_ref *ref;
+ struct dpll_pin *ppin;
+ struct nlattr *nest;
+ unsigned long index;
+ int ret;
+
+ xa_for_each(&pin->parent_refs, index, ref) {
+ const struct dpll_pin_ops *ops = dpll_pin_ops(ref);
+ void *parent_priv;
+
+ ppin = ref->pin;
+ parent_priv = dpll_pin_on_dpll_priv(dpll_ref->dpll, ppin);
+ ret = ops->state_on_pin_get(pin,
+ dpll_pin_on_pin_priv(ppin, pin),
+ ppin, parent_priv, &state, extack);
+ if (ret)
+ return ret;
+ nest = nla_nest_start(msg, DPLL_A_PIN_PARENT_PIN);
+ if (!nest)
+ return -EMSGSIZE;
+ if (nla_put_u32(msg, DPLL_A_PIN_ID, ppin->id)) {
+ ret = -EMSGSIZE;
+ goto nest_cancel;
+ }
+ if (nla_put_u8(msg, DPLL_A_PIN_STATE, state)) {
+ ret = -EMSGSIZE;
+ goto nest_cancel;
+ }
+ nla_nest_end(msg, nest);
+ }
+
+ return 0;
+
+nest_cancel:
+ nla_nest_cancel(msg, nest);
+ return ret;
+}
+
+static int
+dpll_msg_add_pin_dplls(struct sk_buff *msg, struct dpll_pin *pin,
+ struct netlink_ext_ack *extack)
+{
+ struct dpll_pin_ref *ref;
+ struct nlattr *attr;
+ unsigned long index;
+ int ret;
+
+ xa_for_each(&pin->dpll_refs, index, ref) {
+ attr = nla_nest_start(msg, DPLL_A_PIN_PARENT_DEVICE);
+ if (!attr)
+ return -EMSGSIZE;
+ ret = dpll_msg_add_dev_handle(msg, ref->dpll);
+ if (ret)
+ goto nest_cancel;
+ ret = dpll_msg_add_pin_on_dpll_state(msg, pin, ref, extack);
+ if (ret)
+ goto nest_cancel;
+ ret = dpll_msg_add_pin_prio(msg, pin, ref, extack);
+ if (ret)
+ goto nest_cancel;
+ ret = dpll_msg_add_pin_direction(msg, pin, ref, extack);
+ if (ret)
+ goto nest_cancel;
+ nla_nest_end(msg, attr);
+ }
+
+ return 0;
+
+nest_cancel:
+ nla_nest_end(msg, attr);
+ return ret;
+}
+
+static int
+dpll_cmd_pin_get_one(struct sk_buff *msg, struct dpll_pin *pin,
+ struct netlink_ext_ack *extack)
+{
+ const struct dpll_pin_properties *prop = pin->prop;
+ struct dpll_pin_ref *ref;
+ int ret;
+
+ ref = dpll_xa_ref_dpll_first(&pin->dpll_refs);
+ ASSERT_NOT_NULL(ref);
+ ret = dpll_msg_add_pin_handle(msg, pin);
+ if (ret)
+ return ret;
+ if (nla_put_string(msg, DPLL_A_MODULE_NAME, module_name(pin->module)))
+ return -EMSGSIZE;
+ if (nla_put_64bit(msg, DPLL_A_CLOCK_ID, sizeof(pin->clock_id),
+ &pin->clock_id, 0))
+ return -EMSGSIZE;
+ if (prop->board_label &&
+ nla_put_string(msg, DPLL_A_PIN_BOARD_LABEL, prop->board_label))
+ return -EMSGSIZE;
+ if (prop->panel_label &&
+ nla_put_string(msg, DPLL_A_PIN_PANEL_LABEL, prop->panel_label))
+ return -EMSGSIZE;
+ if (prop->package_label &&
+ nla_put_string(msg, DPLL_A_PIN_PACKAGE_LABEL,
+ prop->package_label))
+ return -EMSGSIZE;
+ if (nla_put_u8(msg, DPLL_A_PIN_TYPE, prop->type))
+ return -EMSGSIZE;
+ if (nla_put_u32(msg, DPLL_A_PIN_DPLL_CAPS, prop->capabilities))
+ return -EMSGSIZE;
+ ret = dpll_msg_add_pin_freq(msg, pin, ref, extack);
+ if (ret)
+ return ret;
+ if (xa_empty(&pin->parent_refs))
+ ret = dpll_msg_add_pin_dplls(msg, pin, extack);
+ else
+ ret = dpll_msg_add_pin_parents(msg, pin, ref, extack);
+
+ return ret;
+}
+
+static int
+dpll_device_get_one(struct dpll_device *dpll, struct sk_buff *msg,
+ struct netlink_ext_ack *extack)
+{
+ int ret;
+
+ ret = dpll_msg_add_dev_handle(msg, dpll);
+ if (ret)
+ return ret;
+ if (nla_put_string(msg, DPLL_A_MODULE_NAME, module_name(dpll->module)))
+ return -EMSGSIZE;
+ if (nla_put_64bit(msg, DPLL_A_CLOCK_ID, sizeof(dpll->clock_id),
+ &dpll->clock_id, 0))
+ return -EMSGSIZE;
+ ret = dpll_msg_add_temp(msg, dpll, extack);
+ if (ret)
+ return ret;
+ ret = dpll_msg_add_lock_status(msg, dpll, extack);
+ if (ret)
+ return ret;
+ ret = dpll_msg_add_mode(msg, dpll, extack);
+ if (ret)
+ return ret;
+ ret = dpll_msg_add_mode_supported(msg, dpll, extack);
+ if (ret)
+ return ret;
+ if (nla_put_u8(msg, DPLL_A_TYPE, dpll->type))
+ return -EMSGSIZE;
+
+ return ret;
+}
+
+static int
+dpll_device_event_send(enum dpll_cmd event, struct dpll_device *dpll)
+{
+ struct sk_buff *msg;
+ void *hdr;
+ int ret;
+
+ if (WARN_ON(!xa_get_mark(&dpll_device_xa, dpll->id, DPLL_REGISTERED)))
+ return -ENODEV;
+ msg = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+ hdr = genlmsg_put(msg, 0, 0, &dpll_nl_family, 0, event);
+ if (!hdr)
+ goto err_free_msg;
+ ret = dpll_device_get_one(dpll, msg, NULL);
+ if (ret)
+ goto err_cancel_msg;
+ genlmsg_end(msg, hdr);
+ genlmsg_multicast(&dpll_nl_family, msg, 0, 0, GFP_KERNEL);
+
+ return 0;
+
+err_cancel_msg:
+ genlmsg_cancel(msg, hdr);
+err_free_msg:
+ nlmsg_free(msg);
+
+ return ret;
+}
+
+int dpll_device_create_ntf(struct dpll_device *dpll)
+{
+ return dpll_device_event_send(DPLL_CMD_DEVICE_CREATE_NTF, dpll);
+}
+
+int dpll_device_delete_ntf(struct dpll_device *dpll)
+{
+ return dpll_device_event_send(DPLL_CMD_DEVICE_DELETE_NTF, dpll);
+}
+
+int __dpll_device_change_ntf(struct dpll_device *dpll)
+{
+ return dpll_device_event_send(DPLL_CMD_DEVICE_CHANGE_NTF, dpll);
+}
+
+/**
+ * dpll_device_change_ntf - notify that the dpll device has been changed
+ * @dpll: registered dpll pointer
+ *
+ * Context: acquires and holds a dpll_lock.
+ * Return: 0 if succeeds, error code otherwise.
+ */
+int dpll_device_change_ntf(struct dpll_device *dpll)
+{
+ int ret;
+
+ mutex_lock(&dpll_lock);
+ ret = __dpll_device_change_ntf(dpll);
+ mutex_unlock(&dpll_lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(dpll_device_change_ntf);
+
+static int
+dpll_pin_event_send(enum dpll_cmd event, struct dpll_pin *pin)
+{
+ struct sk_buff *msg;
+ void *hdr;
+ int ret;
+
+ if (WARN_ON(!xa_get_mark(&dpll_pin_xa, pin->id, DPLL_REGISTERED)))
+ return -ENODEV;
+
+ msg = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ hdr = genlmsg_put(msg, 0, 0, &dpll_nl_family, 0, event);
+ if (!hdr)
+ goto err_free_msg;
+ ret = dpll_cmd_pin_get_one(msg, pin, NULL);
+ if (ret)
+ goto err_cancel_msg;
+ genlmsg_end(msg, hdr);
+ genlmsg_multicast(&dpll_nl_family, msg, 0, 0, GFP_KERNEL);
+
+ return 0;
+
+err_cancel_msg:
+ genlmsg_cancel(msg, hdr);
+err_free_msg:
+ nlmsg_free(msg);
+
+ return ret;
+}
+
+int dpll_pin_create_ntf(struct dpll_pin *pin)
+{
+ return dpll_pin_event_send(DPLL_CMD_PIN_CREATE_NTF, pin);
+}
+
+int dpll_pin_delete_ntf(struct dpll_pin *pin)
+{
+ return dpll_pin_event_send(DPLL_CMD_PIN_DELETE_NTF, pin);
+}
+
+static int __dpll_pin_change_ntf(struct dpll_pin *pin)
+{
+ return dpll_pin_event_send(DPLL_CMD_PIN_CHANGE_NTF, pin);
+}
+
+/**
+ * dpll_pin_change_ntf - notify that the pin has been changed
+ * @pin: registered pin pointer
+ *
+ * Context: acquires and holds a dpll_lock.
+ * Return: 0 if succeeds, error code otherwise.
+ */
+int dpll_pin_change_ntf(struct dpll_pin *pin)
+{
+ int ret;
+
+ mutex_lock(&dpll_lock);
+ ret = __dpll_pin_change_ntf(pin);
+ mutex_unlock(&dpll_lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(dpll_pin_change_ntf);
+
+static int
+dpll_pin_freq_set(struct dpll_pin *pin, struct nlattr *a,
+ struct netlink_ext_ack *extack)
+{
+ u64 freq = nla_get_u64(a);
+ struct dpll_pin_ref *ref;
+ unsigned long i;
+ int ret;
+
+ if (!dpll_pin_is_freq_supported(pin, freq)) {
+ NL_SET_ERR_MSG_FMT(extack, "not supported freq:%llu on pin:%u",
+ freq, pin->id);
+ return -EINVAL;
+ }
+
+ xa_for_each(&pin->dpll_refs, i, ref) {
+ const struct dpll_pin_ops *ops = dpll_pin_ops(ref);
+ struct dpll_device *dpll = ref->dpll;
+
+ if (!ops->frequency_set)
+ return -EOPNOTSUPP;
+ ret = ops->frequency_set(pin, dpll_pin_on_dpll_priv(dpll, pin),
+ dpll, dpll_priv(dpll), freq, extack);
+ if (ret)
+ return ret;
+ __dpll_pin_change_ntf(pin);
+ }
+
+ return 0;
+}
+
+static int
+dpll_pin_on_pin_state_set(struct dpll_pin *pin, u32 parent_idx,
+ enum dpll_pin_state state,
+ struct netlink_ext_ack *extack)
+{
+ struct dpll_pin_ref *parent_ref;
+ const struct dpll_pin_ops *ops;
+ struct dpll_pin_ref *dpll_ref;
+ void *pin_priv, *parent_priv;
+ struct dpll_pin *parent;
+ unsigned long i;
+ int ret;
+
+ if (!(DPLL_PIN_CAPS_STATE_CAN_CHANGE & pin->prop->capabilities)) {
+ NL_SET_ERR_MSG_FMT(extack, "pin:%u not allowed to change state",
+ pin->id);
+ return -EOPNOTSUPP;
+ }
+ parent = xa_load(&dpll_pin_xa, parent_idx);
+ if (!parent)
+ return -EINVAL;
+ parent_ref = xa_load(&pin->parent_refs, parent->pin_idx);
+ if (!parent_ref)
+ return -EINVAL;
+ xa_for_each(&parent->dpll_refs, i, dpll_ref) {
+ ops = dpll_pin_ops(parent_ref);
+ if (!ops->state_on_pin_set)
+ return -EOPNOTSUPP;
+ pin_priv = dpll_pin_on_pin_priv(parent, pin);
+ parent_priv = dpll_pin_on_dpll_priv(dpll_ref->dpll, parent);
+ ret = ops->state_on_pin_set(pin, pin_priv, parent, parent_priv,
+ state, extack);
+ if (ret)
+ return ret;
+ }
+ __dpll_pin_change_ntf(pin);
+
+ return 0;
+}
+
+static int
+dpll_pin_state_set(struct dpll_device *dpll, struct dpll_pin *pin,
+ enum dpll_pin_state state,
+ struct netlink_ext_ack *extack)
+{
+ const struct dpll_pin_ops *ops;
+ struct dpll_pin_ref *ref;
+ int ret;
+
+ if (!(DPLL_PIN_CAPS_STATE_CAN_CHANGE & pin->prop->capabilities)) {
+ NL_SET_ERR_MSG_FMT(extack, "pin:%u not allowed to change state",
+ pin->id);
+ return -EOPNOTSUPP;
+ }
+ ref = xa_load(&pin->dpll_refs, dpll->device_idx);
+ ASSERT_NOT_NULL(ref);
+ ops = dpll_pin_ops(ref);
+ if (!ops->state_on_dpll_set)
+ return -EOPNOTSUPP;
+ ret = ops->state_on_dpll_set(pin, dpll_pin_on_dpll_priv(dpll, pin),
+ dpll, dpll_priv(dpll), state, extack);
+ if (ret)
+ return ret;
+ __dpll_pin_change_ntf(pin);
+
+ return 0;
+}
+
+static int
+dpll_pin_prio_set(struct dpll_device *dpll, struct dpll_pin *pin,
+ u32 prio, struct netlink_ext_ack *extack)
+{
+ const struct dpll_pin_ops *ops;
+ struct dpll_pin_ref *ref;
+ int ret;
+
+ if (!(DPLL_PIN_CAPS_PRIORITY_CAN_CHANGE & pin->prop->capabilities)) {
+ NL_SET_ERR_MSG_FMT(extack, "pin:%u not allowed to change prio",
+ pin->id);
+ return -EOPNOTSUPP;
+ }
+ ref = xa_load(&pin->dpll_refs, dpll->device_idx);
+ ASSERT_NOT_NULL(ref);
+ ops = dpll_pin_ops(ref);
+ if (!ops->prio_set)
+ return -EOPNOTSUPP;
+ ret = ops->prio_set(pin, dpll_pin_on_dpll_priv(dpll, pin), dpll,
+ dpll_priv(dpll), prio, extack);
+ if (ret)
+ return ret;
+ __dpll_pin_change_ntf(pin);
+
+ return 0;
+}
+
+static int
+dpll_pin_direction_set(struct dpll_pin *pin, struct dpll_device *dpll,
+ enum dpll_pin_direction direction,
+ struct netlink_ext_ack *extack)
+{
+ const struct dpll_pin_ops *ops;
+ struct dpll_pin_ref *ref;
+ int ret;
+
+ if (!(DPLL_PIN_CAPS_DIRECTION_CAN_CHANGE & pin->prop->capabilities)) {
+ NL_SET_ERR_MSG_FMT(extack,
+ "pin:%u not allowed to change direction",
+ pin->id);
+ return -EOPNOTSUPP;
+ }
+ ref = xa_load(&pin->dpll_refs, dpll->device_idx);
+ ASSERT_NOT_NULL(ref);
+ ops = dpll_pin_ops(ref);
+ if (!ops->direction_set)
+ return -EOPNOTSUPP;
+ ret = ops->direction_set(pin, dpll_pin_on_dpll_priv(dpll, pin),
+ dpll, dpll_priv(dpll), direction, extack);
+ if (ret)
+ return ret;
+ __dpll_pin_change_ntf(pin);
+
+ return 0;
+}
+
+static int
+dpll_pin_parent_device_set(struct dpll_pin *pin, struct nlattr *parent_nest,
+ struct netlink_ext_ack *extack)
+{
+ struct nlattr *tb[DPLL_A_MAX + 1];
+ enum dpll_pin_direction direction;
+ enum dpll_pin_state state;
+ struct dpll_pin_ref *ref;
+ struct dpll_device *dpll;
+ u32 pdpll_idx, prio;
+ int ret;
+
+ nla_parse_nested(tb, DPLL_A_MAX, parent_nest,
+ NULL, extack);
+ if (!tb[DPLL_A_ID]) {
+ NL_SET_ERR_MSG(extack, "device parent id expected");
+ return -EINVAL;
+ }
+ pdpll_idx = nla_get_u32(tb[DPLL_A_ID]);
+ dpll = xa_load(&dpll_device_xa, pdpll_idx);
+ if (!dpll)
+ return -EINVAL;
+ ref = xa_load(&pin->dpll_refs, dpll->device_idx);
+ ASSERT_NOT_NULL(ref);
+ if (tb[DPLL_A_PIN_STATE]) {
+ state = nla_get_u8(tb[DPLL_A_PIN_STATE]);
+ ret = dpll_pin_state_set(dpll, pin, state, extack);
+ if (ret)
+ return ret;
+ }
+ if (tb[DPLL_A_PIN_PRIO]) {
+ prio = nla_get_u8(tb[DPLL_A_PIN_PRIO]);
+ ret = dpll_pin_prio_set(dpll, pin, prio, extack);
+ if (ret)
+ return ret;
+ }
+ if (tb[DPLL_A_PIN_DIRECTION]) {
+ direction = nla_get_u8(tb[DPLL_A_PIN_DIRECTION]);
+ ret = dpll_pin_direction_set(pin, dpll, direction, extack);
+ if (ret)
+ return ret;
+ }
+ return 0;
+}
+
+static int
+dpll_pin_parent_pin_set(struct dpll_pin *pin, struct nlattr *parent_nest,
+ struct netlink_ext_ack *extack)
+{
+ struct nlattr *tb[DPLL_A_MAX + 1];
+ enum dpll_pin_state state;
+ u32 ppin_idx;
+ int ret;
+
+ nla_parse_nested(tb, DPLL_A_MAX, parent_nest,
+ NULL, extack);
+ if (!tb[DPLL_A_PIN_ID]) {
+ NL_SET_ERR_MSG(extack, "parent pin id expected");
+ return -EINVAL;
+ }
+ ppin_idx = nla_get_u32(tb[DPLL_A_PIN_ID]);
+ state = nla_get_u8(tb[DPLL_A_PIN_STATE]);
+ ret = dpll_pin_on_pin_state_set(pin, ppin_idx, state, extack);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int
+dpll_pin_set_from_nlattr(struct dpll_pin *pin, struct genl_info *info)
+{
+ int rem, ret = -EINVAL;
+ struct nlattr *a;
+
+ nla_for_each_attr(a, genlmsg_data(info->genlhdr),
+ genlmsg_len(info->genlhdr), rem) {
+ switch (nla_type(a)) {
+ case DPLL_A_PIN_FREQUENCY:
+ ret = dpll_pin_freq_set(pin, a, info->extack);
+ if (ret)
+ return ret;
+ break;
+ case DPLL_A_PIN_PARENT_DEVICE:
+ ret = dpll_pin_parent_device_set(pin, a, info->extack);
+ if (ret)
+ return ret;
+ break;
+ case DPLL_A_PIN_PARENT_PIN:
+ ret = dpll_pin_parent_pin_set(pin, a, info->extack);
+ if (ret)
+ return ret;
+ break;
+ case DPLL_A_PIN_ID:
+ case DPLL_A_ID:
+ break;
+ default:
+ NL_SET_ERR_MSG_FMT(info->extack,
+ "unsupported attribute (%d)",
+ nla_type(a));
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+static struct dpll_pin *
+dpll_pin_find(u64 clock_id, struct nlattr *mod_name_attr,
+ enum dpll_pin_type type, struct nlattr *board_label,
+ struct nlattr *panel_label, struct nlattr *package_label,
+ struct netlink_ext_ack *extack)
+{
+ bool board_match, panel_match, package_match;
+ struct dpll_pin *pin_match = NULL, *pin;
+ const struct dpll_pin_properties *prop;
+ bool cid_match, mod_match, type_match;
+ unsigned long i;
+
+ xa_for_each_marked(&dpll_pin_xa, i, pin, DPLL_REGISTERED) {
+ prop = pin->prop;
+ cid_match = clock_id ? pin->clock_id == clock_id : true;
+ mod_match = mod_name_attr && module_name(pin->module) ?
+ !nla_strcmp(mod_name_attr,
+ module_name(pin->module)) : true;
+ type_match = type ? prop->type == type : true;
+ board_match = board_label ? (prop->board_label ?
+ !nla_strcmp(board_label, prop->board_label) : false) :
+ true;
+ panel_match = panel_label ? (prop->panel_label ?
+ !nla_strcmp(panel_label, prop->panel_label) : false) :
+ true;
+ package_match = package_label ? (prop->package_label ?
+ !nla_strcmp(package_label, prop->package_label) :
+ false) : true;
+ if (cid_match && mod_match && type_match && board_match &&
+ panel_match && package_match) {
+ if (pin_match) {
+ NL_SET_ERR_MSG(extack, "multiple matches");
+ return ERR_PTR(-EINVAL);
+ }
+ pin_match = pin;
+ };
+ }
+ if (!pin_match) {
+ NL_SET_ERR_MSG(extack, "not found");
+ return ERR_PTR(-ENODEV);
+ }
+ return pin_match;
+}
+
+static struct dpll_pin *dpll_pin_find_from_nlattr(struct genl_info *info)
+{
+ struct nlattr *attr, *mod_name_attr = NULL, *board_label_attr = NULL,
+ *panel_label_attr = NULL, *package_label_attr = NULL;
+ enum dpll_pin_type type = 0;
+ u64 clock_id = 0;
+ int rem = 0;
+
+ nla_for_each_attr(attr, genlmsg_data(info->genlhdr),
+ genlmsg_len(info->genlhdr), rem) {
+ switch (nla_type(attr)) {
+ case DPLL_A_CLOCK_ID:
+ if (clock_id)
+ goto duplicated_attr;
+ clock_id = nla_get_u64(attr);
+ break;
+ case DPLL_A_MODULE_NAME:
+ if (mod_name_attr)
+ goto duplicated_attr;
+ mod_name_attr = attr;
+ break;
+ case DPLL_A_PIN_TYPE:
+ if (type)
+ goto duplicated_attr;
+ type = nla_get_u8(attr);
+ break;
+ case DPLL_A_PIN_BOARD_LABEL:
+ if (board_label_attr)
+ goto duplicated_attr;
+ board_label_attr = attr;
+ break;
+ case DPLL_A_PIN_PANEL_LABEL:
+ if (panel_label_attr)
+ goto duplicated_attr;
+ panel_label_attr = attr;
+ break;
+ case DPLL_A_PIN_PACKAGE_LABEL:
+ if (package_label_attr)
+ goto duplicated_attr;
+ package_label_attr = attr;
+ break;
+ default:
+ break;
+ }
+ }
+ if (!(clock_id || mod_name_attr || board_label_attr ||
+ panel_label_attr || package_label_attr)) {
+ NL_SET_ERR_MSG(info->extack, "missing attributes");
+ return ERR_PTR(-EINVAL);
+ }
+ return dpll_pin_find(clock_id, mod_name_attr, type, board_label_attr,
+ panel_label_attr, package_label_attr,
+ info->extack);
+duplicated_attr:
+ NL_SET_ERR_MSG(info->extack, "duplicated attribute");
+ return ERR_PTR(-EINVAL);
+}
+
+int dpll_nl_pin_id_get_doit(struct sk_buff *skb, struct genl_info *info)
+{
+ struct dpll_pin *pin;
+ struct sk_buff *msg;
+ struct nlattr *hdr;
+ int ret;
+
+ msg = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+ hdr = genlmsg_put_reply(msg, info, &dpll_nl_family, 0,
+ DPLL_CMD_PIN_ID_GET);
+ if (!hdr)
+ return -EMSGSIZE;
+
+ pin = dpll_pin_find_from_nlattr(info);
+ if (!IS_ERR(pin)) {
+ ret = dpll_msg_add_pin_handle(msg, pin);
+ if (ret) {
+ nlmsg_free(msg);
+ return ret;
+ }
+ }
+ genlmsg_end(msg, hdr);
+
+ return genlmsg_reply(msg, info);
+}
+
+int dpll_nl_pin_get_doit(struct sk_buff *skb, struct genl_info *info)
+{
+ struct dpll_pin *pin = info->user_ptr[0];
+ struct sk_buff *msg;
+ struct nlattr *hdr;
+ int ret;
+
+ if (!pin)
+ return -ENODEV;
+ msg = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+ hdr = genlmsg_put_reply(msg, info, &dpll_nl_family, 0,
+ DPLL_CMD_PIN_GET);
+ if (!hdr)
+ return -EMSGSIZE;
+ ret = dpll_cmd_pin_get_one(msg, pin, info->extack);
+ if (ret) {
+ nlmsg_free(msg);
+ return ret;
+ }
+ genlmsg_end(msg, hdr);
+
+ return genlmsg_reply(msg, info);
+}
+
+int dpll_nl_pin_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ struct dpll_dump_ctx *ctx = dpll_dump_context(cb);
+ struct dpll_pin *pin;
+ struct nlattr *hdr;
+ unsigned long i;
+ int ret = 0;
+
+ xa_for_each_marked_start(&dpll_pin_xa, i, pin, DPLL_REGISTERED,
+ ctx->idx) {
+ hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid,
+ cb->nlh->nlmsg_seq,
+ &dpll_nl_family, NLM_F_MULTI,
+ DPLL_CMD_PIN_GET);
+ if (!hdr) {
+ ret = -EMSGSIZE;
+ break;
+ }
+ ret = dpll_cmd_pin_get_one(skb, pin, cb->extack);
+ if (ret) {
+ genlmsg_cancel(skb, hdr);
+ break;
+ }
+ genlmsg_end(skb, hdr);
+ }
+ if (ret == -EMSGSIZE) {
+ ctx->idx = i;
+ return skb->len;
+ }
+ return ret;
+}
+
+int dpll_nl_pin_set_doit(struct sk_buff *skb, struct genl_info *info)
+{
+ struct dpll_pin *pin = info->user_ptr[0];
+
+ return dpll_pin_set_from_nlattr(pin, info);
+}
+
+static int
+dpll_set_from_nlattr(struct dpll_device *dpll, struct genl_info *info)
+{
+ const struct dpll_device_ops *ops = dpll_device_ops(dpll);
+ struct nlattr *tb[DPLL_A_MAX + 1];
+ int ret;
+
+ nla_parse(tb, DPLL_A_MAX, genlmsg_data(info->genlhdr),
+ genlmsg_len(info->genlhdr), NULL, info->extack);
+ if (tb[DPLL_A_MODE]) {
+ if (!ops->mode_set) {
+ NL_SET_ERR_MSG(info->extack, "mode set not supported");
+ return -EINVAL;
+ }
+ ret = ops->mode_set(dpll, dpll_priv(dpll),
+ nla_get_u8(tb[DPLL_A_MODE]), info->extack);
+ if (ret)
+ return ret;
+ __dpll_device_change_ntf(dpll);
+ }
+
+ return 0;
+}
+
+static struct dpll_device *
+dpll_device_find(u64 clock_id, struct nlattr *mod_name_attr,
+ enum dpll_type type, struct netlink_ext_ack *extack)
+{
+ struct dpll_device *dpll_match = NULL, *dpll;
+ bool cid_match, mod_match, type_match;
+ unsigned long i;
+
+ xa_for_each_marked(&dpll_device_xa, i, dpll, DPLL_REGISTERED) {
+ cid_match = clock_id ? dpll->clock_id == clock_id : true;
+ mod_match = mod_name_attr ? (module_name(dpll->module) ?
+ !nla_strcmp(mod_name_attr,
+ module_name(dpll->module)) : false) : true;
+ type_match = type ? dpll->type == type : true;
+ if (cid_match && mod_match && type_match) {
+ if (dpll_match) {
+ NL_SET_ERR_MSG(extack, "multiple matches");
+ return ERR_PTR(-EINVAL);
+ }
+ dpll_match = dpll;
+ }
+ }
+ if (!dpll_match) {
+ NL_SET_ERR_MSG(extack, "not found");
+ return ERR_PTR(-ENODEV);
+ }
+
+ return dpll_match;
+}
+
+static struct dpll_device *
+dpll_device_find_from_nlattr(struct genl_info *info)
+{
+ struct nlattr *attr, *mod_name_attr = NULL;
+ enum dpll_type type = 0;
+ u64 clock_id = 0;
+ int rem = 0;
+
+ nla_for_each_attr(attr, genlmsg_data(info->genlhdr),
+ genlmsg_len(info->genlhdr), rem) {
+ switch (nla_type(attr)) {
+ case DPLL_A_CLOCK_ID:
+ if (clock_id)
+ goto duplicated_attr;
+ clock_id = nla_get_u64(attr);
+ break;
+ case DPLL_A_MODULE_NAME:
+ if (mod_name_attr)
+ goto duplicated_attr;
+ mod_name_attr = attr;
+ break;
+ case DPLL_A_TYPE:
+ if (type)
+ goto duplicated_attr;
+ type = nla_get_u8(attr);
+ break;
+ default:
+ break;
+ }
+ }
+ if (!clock_id && !mod_name_attr && !type) {
+ NL_SET_ERR_MSG(info->extack, "missing attributes");
+ return ERR_PTR(-EINVAL);
+ }
+ return dpll_device_find(clock_id, mod_name_attr, type, info->extack);
+duplicated_attr:
+ NL_SET_ERR_MSG(info->extack, "duplicated attribute");
+ return ERR_PTR(-EINVAL);
+}
+
+int dpll_nl_device_id_get_doit(struct sk_buff *skb, struct genl_info *info)
+{
+ struct dpll_device *dpll;
+ struct sk_buff *msg;
+ struct nlattr *hdr;
+ int ret;
+
+ msg = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+ hdr = genlmsg_put_reply(msg, info, &dpll_nl_family, 0,
+ DPLL_CMD_DEVICE_ID_GET);
+ if (!hdr)
+ return -EMSGSIZE;
+
+ dpll = dpll_device_find_from_nlattr(info);
+ if (!IS_ERR(dpll)) {
+ ret = dpll_msg_add_dev_handle(msg, dpll);
+ if (ret) {
+ nlmsg_free(msg);
+ return ret;
+ }
+ }
+ genlmsg_end(msg, hdr);
+
+ return genlmsg_reply(msg, info);
+}
+
+int dpll_nl_device_get_doit(struct sk_buff *skb, struct genl_info *info)
+{
+ struct dpll_device *dpll = info->user_ptr[0];
+ struct sk_buff *msg;
+ struct nlattr *hdr;
+ int ret;
+
+ msg = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+ hdr = genlmsg_put_reply(msg, info, &dpll_nl_family, 0,
+ DPLL_CMD_DEVICE_GET);
+ if (!hdr)
+ return -EMSGSIZE;
+
+ ret = dpll_device_get_one(dpll, msg, info->extack);
+ if (ret) {
+ nlmsg_free(msg);
+ return ret;
+ }
+ genlmsg_end(msg, hdr);
+
+ return genlmsg_reply(msg, info);
+}
+
+int dpll_nl_device_set_doit(struct sk_buff *skb, struct genl_info *info)
+{
+ struct dpll_device *dpll = info->user_ptr[0];
+
+ return dpll_set_from_nlattr(dpll, info);
+}
+
+int dpll_nl_device_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ struct dpll_dump_ctx *ctx = dpll_dump_context(cb);
+ struct dpll_device *dpll;
+ struct nlattr *hdr;
+ unsigned long i;
+ int ret = 0;
+
+ xa_for_each_marked_start(&dpll_device_xa, i, dpll, DPLL_REGISTERED,
+ ctx->idx) {
+ hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid,
+ cb->nlh->nlmsg_seq, &dpll_nl_family,
+ NLM_F_MULTI, DPLL_CMD_DEVICE_GET);
+ if (!hdr) {
+ ret = -EMSGSIZE;
+ break;
+ }
+ ret = dpll_device_get_one(dpll, skb, cb->extack);
+ if (ret) {
+ genlmsg_cancel(skb, hdr);
+ break;
+ }
+ genlmsg_end(skb, hdr);
+ }
+ if (ret == -EMSGSIZE) {
+ ctx->idx = i;
+ return skb->len;
+ }
+ return ret;
+}
+
+int dpll_pre_doit(const struct genl_split_ops *ops, struct sk_buff *skb,
+ struct genl_info *info)
+{
+ u32 id;
+
+ if (GENL_REQ_ATTR_CHECK(info, DPLL_A_ID))
+ return -EINVAL;
+
+ mutex_lock(&dpll_lock);
+ id = nla_get_u32(info->attrs[DPLL_A_ID]);
+ info->user_ptr[0] = dpll_device_get_by_id(id);
+ if (!info->user_ptr[0]) {
+ NL_SET_ERR_MSG(info->extack, "device not found");
+ goto unlock;
+ }
+ return 0;
+unlock:
+ mutex_unlock(&dpll_lock);
+ return -ENODEV;
+}
+
+void dpll_post_doit(const struct genl_split_ops *ops, struct sk_buff *skb,
+ struct genl_info *info)
+{
+ mutex_unlock(&dpll_lock);
+}
+
+int
+dpll_lock_doit(const struct genl_split_ops *ops, struct sk_buff *skb,
+ struct genl_info *info)
+{
+ mutex_lock(&dpll_lock);
+
+ return 0;
+}
+
+void
+dpll_unlock_doit(const struct genl_split_ops *ops, struct sk_buff *skb,
+ struct genl_info *info)
+{
+ mutex_unlock(&dpll_lock);
+}
+
+int dpll_lock_dumpit(struct netlink_callback *cb)
+{
+ mutex_lock(&dpll_lock);
+
+ return 0;
+}
+
+int dpll_unlock_dumpit(struct netlink_callback *cb)
+{
+ mutex_unlock(&dpll_lock);
+
+ return 0;
+}
+
+int dpll_pin_pre_doit(const struct genl_split_ops *ops, struct sk_buff *skb,
+ struct genl_info *info)
+{
+ int ret;
+
+ mutex_lock(&dpll_lock);
+ if (GENL_REQ_ATTR_CHECK(info, DPLL_A_PIN_ID)) {
+ ret = -EINVAL;
+ goto unlock_dev;
+ }
+ info->user_ptr[0] = xa_load(&dpll_pin_xa,
+ nla_get_u32(info->attrs[DPLL_A_PIN_ID]));
+ if (!info->user_ptr[0]) {
+ NL_SET_ERR_MSG(info->extack, "pin not found");
+ ret = -ENODEV;
+ goto unlock_dev;
+ }
+
+ return 0;
+
+unlock_dev:
+ mutex_unlock(&dpll_lock);
+ return ret;
+}
+
+void dpll_pin_post_doit(const struct genl_split_ops *ops, struct sk_buff *skb,
+ struct genl_info *info)
+{
+ mutex_unlock(&dpll_lock);
+}
+
+int __init dpll_netlink_init(void)
+{
+ return genl_register_family(&dpll_nl_family);
+}
+
+void dpll_netlink_finish(void)
+{
+ genl_unregister_family(&dpll_nl_family);
+}
+
+void __exit dpll_netlink_fini(void)
+{
+ dpll_netlink_finish();
+}
new file mode 100644
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2023 Meta Platforms, Inc. and affiliates
+ * Copyright (c) 2023 Intel and affiliates
+ */
+
+int dpll_device_create_ntf(struct dpll_device *dpll);
+
+int dpll_device_delete_ntf(struct dpll_device *dpll);
+
+int dpll_pin_create_ntf(struct dpll_pin *pin);
+
+int dpll_pin_delete_ntf(struct dpll_pin *pin);
+
+int __init dpll_netlink_init(void);
+
+void dpll_netlink_finish(void);
@@ -133,4 +133,8 @@ int dpll_pin_on_pin_register(struct dpll_pin *parent, struct dpll_pin *pin,
void dpll_pin_on_pin_unregister(struct dpll_pin *parent, struct dpll_pin *pin,
const struct dpll_pin_ops *ops, void *priv);
+int dpll_device_change_ntf(struct dpll_device *dpll);
+
+int dpll_pin_change_ntf(struct dpll_pin *pin);
+
#endif