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Message-ID: <c7480d0a71fb8d62108624878f549c0d91d4c9e6.camel@redhat.com>
Date: Wed, 21 Jun 2023 13:18:59 +0200
From: Petr Oros <poros@...hat.com>
To: Arkadiusz Kubalewski <arkadiusz.kubalewski@...el.com>, kuba@...nel.org,
jiri@...nulli.us, vadfed@...a.com, jonathan.lemon@...il.com,
pabeni@...hat.com
Cc: corbet@....net, davem@...emloft.net, edumazet@...gle.com, vadfed@...com,
jesse.brandeburg@...el.com, anthony.l.nguyen@...el.com, saeedm@...dia.com,
leon@...nel.org, richardcochran@...il.com, sj@...nel.org,
javierm@...hat.com, ricardo.canuelo@...labora.com, mst@...hat.com,
tzimmermann@...e.de, michal.michalik@...el.com,
gregkh@...uxfoundation.org, jacek.lawrynowicz@...ux.intel.com,
airlied@...hat.com, ogabbay@...nel.org, arnd@...db.de,
nipun.gupta@....com, axboe@...nel.dk, linux@...y.sk, masahiroy@...nel.org,
benjamin.tissoires@...hat.com, geert+renesas@...der.be,
milena.olech@...el.com, kuniyu@...zon.com, liuhangbin@...il.com,
hkallweit1@...il.com, andy.ren@...cruise.com, razor@...ckwall.org,
idosch@...dia.com, lucien.xin@...il.com, nicolas.dichtel@...nd.com,
phil@....cc, claudiajkang@...il.com, linux-doc@...r.kernel.org,
linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
intel-wired-lan@...ts.osuosl.org, linux-rdma@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, mschmidt@...hat.com,
linux-clk@...r.kernel.org, vadim.fedorenko@...ux.dev
Subject: Re: [RFC PATCH v8 04/10] dpll: netlink: Add DPLL framework base
functions
Arkadiusz Kubalewski píše v Pá 09. 06. 2023 v 14:18 +0200:
> From: Vadim Fedorenko <vadim.fedorenko@...ux.dev>
>
> DPLL framework is used to represent and configure DPLL devices
> in systems. Each device that has DPLL and can configure inputs
> and outputs can use this framework.
>
> Implement dpll netlink framework functions for enablement of dpll
> subsytem netlink family.
>
> Co-developed-by: Milena Olech <milena.olech@...el.com>
> Signed-off-by: Milena Olech <milena.olech@...el.com>
> Co-developed-by: Michal Michalik <michal.michalik@...el.com>
> Signed-off-by: Michal Michalik <michal.michalik@...el.com>
> Signed-off-by: Vadim Fedorenko <vadim.fedorenko@...ux.dev>
> Co-developed-by: Arkadiusz Kubalewski
> <arkadiusz.kubalewski@...el.com>
> Signed-off-by: Arkadiusz Kubalewski <arkadiusz.kubalewski@...el.com>
> ---
> drivers/dpll/dpll_netlink.c | 1183
> +++++++++++++++++++++++++++++++++++
> drivers/dpll/dpll_netlink.h | 44 ++
> 2 files changed, 1227 insertions(+)
> create mode 100644 drivers/dpll/dpll_netlink.c
> create mode 100644 drivers/dpll/dpll_netlink.h
>
> diff --git a/drivers/dpll/dpll_netlink.c
> b/drivers/dpll/dpll_netlink.c
> new file mode 100644
> index 000000000000..44d9699c9e6c
> --- /dev/null
> +++ b/drivers/dpll/dpll_netlink.c
> @@ -0,0 +1,1183 @@
> +// 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>
> +
> +static int __dpll_pin_change_ntf(struct dpll_pin *pin);
> +
> +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;
> +}
> +
> +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;
> +
> + if (WARN_ON(!ops->mode_get))
> + return -EOPNOTSUPP;
> + if (ops->mode_get(dpll, dpll_priv(dpll), &mode, extack))
> + return -EFAULT;
> + if (nla_put_u8(msg, DPLL_A_MODE, 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;
> +
> + if (WARN_ON(!ops->lock_status_get))
> + return -EOPNOTSUPP;
> + if (ops->lock_status_get(dpll, dpll_priv(dpll), &status,
> extack))
> + return -EFAULT;
> + 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;
> +
> + if (!ops->temp_get)
> + return -EOPNOTSUPP;
> + if (ops->temp_get(dpll, dpll_priv(dpll), &temp, extack))
> + return -EFAULT;
> + 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;
> +
> + if (!ops->prio_get)
> + return -EOPNOTSUPP;
> + if (ops->prio_get(pin, dpll_pin_on_dpll_priv(dpll, pin),
> dpll,
> + dpll_priv(dpll), &prio, extack))
> + return -EFAULT;
> + 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;
> +
> + if (!ops->state_on_dpll_get)
> + return -EOPNOTSUPP;
> + if (ops->state_on_dpll_get(pin, dpll_pin_on_dpll_priv(dpll,
> pin), dpll,
> + dpll_priv(dpll), &state, extack))
> + return -EFAULT;
> + 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;
> +
> + if (!ops->direction_get)
> + return -EOPNOTSUPP;
> + if (ops->direction_get(pin, dpll_pin_on_dpll_priv(dpll, pin),
> dpll,
> + dpll_priv(dpll), &direction, extack))
> + return -EFAULT;
> + 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,
> + bool dump_freq_supported)
> +{
> + const struct dpll_pin_ops *ops = dpll_pin_ops(ref);
> + struct dpll_device *dpll = ref->dpll;
> + struct nlattr *nest;
> + u64 freq;
> + int fs;
> +
> + if (!ops->frequency_get)
> + return -EOPNOTSUPP;
> + if (ops->frequency_get(pin, dpll_pin_on_dpll_priv(dpll, pin),
> dpll,
> + dpll_priv(dpll), &freq, extack))
> + return -EFAULT;
> + if (nla_put_64bit(msg, DPLL_A_PIN_FREQUENCY, sizeof(freq),
> &freq, 0))
> + return -EMSGSIZE;
> + if (!dump_freq_supported)
> + return 0;
> + 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 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);
> + if (WARN_ON(!ops->state_on_pin_get))
> + return -EFAULT;
> + ret = ops->state_on_pin_get(pin,
> +
> dpll_pin_on_pin_priv(ppin, pin),
> + ppin, parent_priv,
> &state, extack);
> + if (ret)
> + return -EFAULT;
> + nest = nla_nest_start(msg, DPLL_A_PIN_PARENT);
> + 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);
> + 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 && ret != -EOPNOTSUPP)
> + goto nest_cancel;
> + ret = dpll_msg_add_pin_prio(msg, pin, ref, extack);
> + if (ret && ret != -EOPNOTSUPP)
> + 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_fill_details(struct sk_buff *msg, struct dpll_pin *pin,
> + struct dpll_pin_ref *ref, struct
> netlink_ext_ack *extack)
> +{
> + const struct dpll_pin_properties *prop = pin->prop;
> + int ret;
> +
> + if (nla_put_u32(msg, DPLL_A_PIN_ID, pin->id))
> + return -EMSGSIZE;
> + 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, true);
> + if (ret && ret != -EOPNOTSUPP)
> + return ret;
> + return 0;
> +}
> +
> +static int
> +__dpll_cmd_pin_dump_one(struct sk_buff *msg, struct dpll_pin *pin,
> + struct netlink_ext_ack *extack)
> +{
> + struct dpll_pin_ref *ref;
> + int ret;
> +
> + ref = dpll_xa_ref_dpll_first(&pin->dpll_refs);
> + if (!ref)
> + return -EFAULT;
> + ret = dpll_cmd_pin_fill_details(msg, pin, ref, extack);
> + if (ret)
> + return ret;
> + ret = dpll_msg_add_pin_parents(msg, pin, ref, extack);
> + if (ret)
> + return ret;
> + if (!xa_empty(&pin->dpll_refs)) {
> + ret = dpll_msg_add_pin_dplls(msg, pin, extack);
> + if (ret)
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +static int
> +dpll_device_get_one(struct dpll_device *dpll, struct sk_buff *msg,
> + struct netlink_ext_ack *extack)
> +{
> + enum dpll_mode mode;
> + 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 && ret != -EOPNOTSUPP)
> + 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;
> + for (mode = DPLL_MODE_MANUAL; mode <= DPLL_MODE_MAX; mode++)
> + if (test_bit(mode, &dpll->mode_supported_mask))
> + if (nla_put_s32(msg, DPLL_A_MODE_SUPPORTED,
> mode))
> + return -EMSGSIZE;
> + if (nla_put_u8(msg, DPLL_A_TYPE, dpll->type))
> + return -EMSGSIZE;
> +
> + return ret;
> +}
> +
> +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_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))
> + 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 -EFAULT;
> + __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;
> + struct dpll_pin *parent;
> + unsigned long i;
> +
> + if (!(DPLL_PIN_CAPS_STATE_CAN_CHANGE & pin->prop-
> >capabilities))
> + 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;
> + if (ops->state_on_pin_set(pin,
> +
> dpll_pin_on_pin_priv(parent, pin),
> + parent,
> +
> dpll_pin_on_dpll_priv(dpll_ref->dpll,
> + paren
> t),
> + state, extack))
> + return -EFAULT;
> + }
> + __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;
> +
> + if (!(DPLL_PIN_CAPS_STATE_CAN_CHANGE & pin->prop-
> >capabilities))
> + return -EOPNOTSUPP;
> + ref = xa_load(&pin->dpll_refs, dpll->device_idx);
> + if (!ref)
> + return -EFAULT;
> + ops = dpll_pin_ops(ref);
> + if (!ops->state_on_dpll_set)
> + return -EOPNOTSUPP;
> + if (ops->state_on_dpll_set(pin, dpll_pin_on_dpll_priv(dpll,
> pin), dpll,
> + dpll_priv(dpll), state, extack))
> + return -EINVAL;
> + __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;
> +
> + if (!(DPLL_PIN_CAPS_PRIORITY_CAN_CHANGE & pin->prop-
> >capabilities))
> + return -EOPNOTSUPP;
> + ref = xa_load(&pin->dpll_refs, dpll->device_idx);
> + if (!ref)
> + return -EFAULT;
> + ops = dpll_pin_ops(ref);
> + if (!ops->prio_set)
> + return -EOPNOTSUPP;
> + if (ops->prio_set(pin, dpll_pin_on_dpll_priv(dpll, pin),
> dpll,
> + dpll_priv(dpll), prio, extack))
> + return -EINVAL;
> + __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;
> +
> + if (!(DPLL_PIN_CAPS_DIRECTION_CAN_CHANGE & pin->prop-
> >capabilities))
> + return -EOPNOTSUPP;
> +
> + ref = xa_load(&pin->dpll_refs, dpll->device_idx);
> + if (!ref)
> + return -EFAULT;
> + ops = dpll_pin_ops(ref);
> + if (!ops->direction_set)
> + return -EOPNOTSUPP;
> + if (ops->direction_set(pin, dpll_pin_on_dpll_priv(dpll, pin),
> + dpll, dpll_priv(dpll), direction,
> + extack))
> + return -EFAULT;
> + __dpll_pin_change_ntf(pin);
> +
> + return 0;
> +}
> +
> +static int
> +dpll_pin_parent_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;
> + u32 ppin_idx, pdpll_idx, prio;
> + enum dpll_pin_state state;
> + struct dpll_pin_ref *ref;
> + struct dpll_device *dpll;
> + int ret;
> +
> + nla_parse_nested(tb, DPLL_A_MAX, parent_nest,
> + NULL, extack);
> + if ((tb[DPLL_A_ID] && tb[DPLL_A_PIN_ID]) ||
> + !(tb[DPLL_A_ID] || tb[DPLL_A_PIN_ID])) {
> + NL_SET_ERR_MSG(extack, "one parent id expected");
> + return -EINVAL;
> + }
> + if (tb[DPLL_A_ID]) {
> + 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);
> + if (!ref)
> + return -EINVAL;
> + 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;
> + }
> + } else if (tb[DPLL_A_PIN_ID]) {
> + 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:
> + ret = dpll_pin_parent_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)
> +{
> + 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(&dpll_pin_xa, i, pin) {
> + if (xa_empty(&pin->dpll_refs))
> + continue;
> + 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) :
> true;
> + panel_match = panel_label && prop->panel_label ?
> + !nla_strcmp(panel_label, prop->panel_label) :
> true;
> + package_match = package_label && prop->package_label
> ?
> + !nla_strcmp(package_label,
> + prop->package_label) : true;
> + if (cid_match && mod_match && type_match &&
> board_match &&
> + panel_match && package_match) {
> + if (pin_match)
> + return NULL;
> + pin_match = pin;
> + };
> + }
> +
> + return pin_match;
> +}
> +
> +static int
> +dpll_pin_find_from_nlattr(struct genl_info *info, struct sk_buff
> *skb)
> +{
> + struct nlattr *attr, *mod_name_attr = NULL, *board_label_attr
> = NULL,
> + *panel_label_attr = NULL, *package_label_attr = NULL;
> + struct dpll_pin *pin = 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)
> + return -EINVAL;
> + clock_id = nla_get_u64(attr);
> + break;
> + case DPLL_A_MODULE_NAME:
> + if (mod_name_attr)
> + return -EINVAL;
> + mod_name_attr = attr;
> + break;
> + case DPLL_A_PIN_TYPE:
> + if (type)
> + return -EINVAL;
> + type = nla_get_u8(attr);
> + break;
> + case DPLL_A_PIN_BOARD_LABEL:
> + if (board_label_attr)
> + return -EINVAL;
> + board_label_attr = attr;
> + break;
> + case DPLL_A_PIN_PANEL_LABEL:
> + if (panel_label_attr)
> + return -EINVAL;
> + panel_label_attr = attr;
> + break;
> + case DPLL_A_PIN_PACKAGE_LABEL:
> + if (package_label_attr)
> + return -EINVAL;
> + package_label_attr = attr;
> + break;
> + default:
> + break;
> + }
> + }
> + if (!(clock_id || mod_name_attr || board_label_attr ||
> + panel_label_attr || package_label_attr))
> + return -EINVAL;
> + pin = dpll_pin_find(clock_id, mod_name_attr, type,
> board_label_attr,
> + panel_label_attr, package_label_attr);
> + if (!pin)
> + return -EINVAL;
> + if (nla_put_u32(skb, DPLL_A_PIN_ID, pin->id))
> + return -EMSGSIZE;
> + return 0;
> +}
> +
> +int dpll_nl_pin_id_get_doit(struct sk_buff *skb, struct genl_info
> *info)
> +{
> + 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;
> +
> + ret = dpll_pin_find_from_nlattr(info, msg);
> + 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_dump_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_start(&dpll_pin_xa, i, pin, ctx->idx) {
> + if (xa_empty(&pin->dpll_refs))
> + continue;
> + 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_dump_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 struct dpll_device *
> +dpll_device_find(u64 clock_id, struct nlattr *mod_name_attr,
> + enum dpll_type type)
> +{
> + 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)) :
> true;
> + type_match = type ? dpll->type == type : true;
> + if (cid_match && mod_match && type_match) {
> + if (dpll_match)
> + return NULL;
> + dpll_match = dpll;
> + }
> + }
> +
> + return dpll_match;
> +}
> +
> +static int
> +dpll_device_find_from_nlattr(struct genl_info *info, struct sk_buff
> *skb)
> +{
> + struct nlattr *attr, *mod_name_attr = NULL;
> + struct dpll_device *dpll = 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)
> + return -EINVAL;
> + clock_id = nla_get_u64(attr);
> + break;
> + case DPLL_A_MODULE_NAME:
> + if (mod_name_attr)
> + return -EINVAL;
> + mod_name_attr = attr;
> + break;
> + case DPLL_A_TYPE:
> + if (type)
> + return -EINVAL;
> + type = nla_get_u8(attr);
> + break;
> + default:
> + break;
> + }
> + }
> +
> + if (!clock_id && !mod_name_attr && !type)
> + return -EINVAL;
> + dpll = dpll_device_find(clock_id, mod_name_attr, type);
> + if (!dpll)
> + return -EINVAL;
> +
> + return dpll_msg_add_dev_handle(skb, dpll);
> +}
> +
> +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 = 0;
> +
> + nla_parse(tb, DPLL_A_MAX, genlmsg_data(info->genlhdr),
> + genlmsg_len(info->genlhdr), NULL, info->extack);
> + if (tb[DPLL_A_MODE]) {
Hi,
Here should be something like:
if (!ops->mode_set)
return -EOPNOTSUPP;
Regards,
Petr
> + ret = ops->mode_set(dpll, dpll_priv(dpll),
> + nla_get_u8(tb[DPLL_A_MODE]),
> info->extack);
> + if (ret)
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +int dpll_nl_device_id_get_doit(struct sk_buff *skb, struct genl_info
> *info)
> +{
> + 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;
> +
> + ret = dpll_device_find_from_nlattr(info, msg);
> + 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_start(&dpll_device_xa, i, dpll, ctx->idx) {
> + if (!xa_get_mark(&dpll_device_xa, i,
> DPLL_REGISTERED))
> + continue;
> + 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)
> +{
> + struct dpll_device *dpll_id = NULL;
> + u32 id;
> +
> + if (!info->attrs[DPLL_A_ID])
> + return -EINVAL;
> +
> + mutex_lock(&dpll_lock);
> + id = nla_get_u32(info->attrs[DPLL_A_ID]);
> +
> + dpll_id = dpll_device_get_by_id(id);
> + if (!dpll_id)
> + goto unlock;
> + info->user_ptr[0] = dpll_id;
> + 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 (!info->attrs[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]) {
> + 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);
> +}
> +
> +static int
> +dpll_device_event_send(enum dpll_cmd event, struct dpll_device
> *dpll)
> +{
> + struct sk_buff *msg;
> + int ret = -EMSGSIZE;
> + void *hdr;
> +
> + if (!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 out_free_msg;
> + ret = dpll_device_get_one(dpll, msg, NULL);
> + if (ret)
> + goto out_cancel_msg;
> + genlmsg_end(msg, hdr);
> + genlmsg_multicast(&dpll_nl_family, msg, 0, 0, GFP_KERNEL);
> +
> + return 0;
> +
> +out_cancel_msg:
> + genlmsg_cancel(msg, hdr);
> +out_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)
> +{
> + int ret = -EINVAL;
> +
> + if (WARN_ON(!dpll))
> + return ret;
> +
> + mutex_lock(&dpll_lock);
> + ret = dpll_device_event_send(DPLL_CMD_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 dpll_pin *pin_verify;
> + struct sk_buff *msg;
> + int ret = -EMSGSIZE;
> + void *hdr;
> +
> + pin_verify = xa_load(&dpll_pin_xa, pin->id);
> + if (pin != pin_verify)
> + 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 out_free_msg;
> + ret = __dpll_cmd_pin_dump_one(msg, pin, NULL);
> + if (ret)
> + goto out_cancel_msg;
> + genlmsg_end(msg, hdr);
> + genlmsg_multicast(&dpll_nl_family, msg, 0, 0, GFP_KERNEL);
> +
> + return 0;
> +
> +out_cancel_msg:
> + genlmsg_cancel(msg, hdr);
> +out_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);
> +}
> +
> +int dpll_pin_change_ntf(struct dpll_pin *pin)
> +{
> + int ret = -EINVAL;
> +
> + if (WARN_ON(!pin))
> + return ret;
> +
> + mutex_lock(&dpll_lock);
> + ret = __dpll_pin_change_ntf(pin);
> + mutex_unlock(&dpll_lock);
> +
> + return ret;
> +}
> +EXPORT_SYMBOL_GPL(dpll_pin_change_ntf);
> +
> +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();
> +}
> diff --git a/drivers/dpll/dpll_netlink.h
> b/drivers/dpll/dpll_netlink.h
> new file mode 100644
> index 000000000000..b5f9bfc88c9e
> --- /dev/null
> +++ b/drivers/dpll/dpll_netlink.h
> @@ -0,0 +1,44 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Copyright (c) 2023 Meta Platforms, Inc. and affiliates
> + * Copyright (c) 2023 Intel and affiliates
> + */
> +
> +/**
> + * dpll_device_create_ntf - notify that the device has been created
> + * @dpll: registered dpll pointer
> + *
> + * Context: caller shall hold dpll_xa_lock.
> + * Return: 0 if succeeds, error code otherwise.
> + */
> +int dpll_device_create_ntf(struct dpll_device *dpll);
> +
> +/**
> + * dpll_device_delete_ntf - notify that the device has been deleted
> + * @dpll: registered dpll pointer
> + *
> + * Context: caller shall hold dpll_xa_lock.
> + * Return: 0 if succeeds, error code otherwise.
> + */
> +int dpll_device_delete_ntf(struct dpll_device *dpll);
> +
> +/**
> + * dpll_pin_create_ntf - notify that the pin has been created
> + * @pin: registered pin pointer
> + *
> + * Context: caller shall hold dpll_xa_lock.
> + * Return: 0 if succeeds, error code otherwise.
> + */
> +int dpll_pin_create_ntf(struct dpll_pin *pin);
> +
> +/**
> + * dpll_pin_delete_ntf - notify that the pin has been deleted
> + * @pin: registered pin pointer
> + *
> + * Context: caller shall hold dpll_xa_lock.
> + * Return: 0 if succeeds, error code otherwise.
> + */
> +int dpll_pin_delete_ntf(struct dpll_pin *pin);
> +
> +int __init dpll_netlink_init(void);
> +void dpll_netlink_finish(void);
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