448 lines
11 KiB
C
448 lines
11 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2013-2015, 2017-2018, 2020-2021, The Linux Foundation. All rights reserved.
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* Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
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*/
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#include <linux/idr.h>
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#include <linux/slab.h>
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#include "esoc.h"
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static DEFINE_IDA(esoc_ida);
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/* SYSFS */
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static ssize_t esoc_name_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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return scnprintf(buf, ESOC_NAME_LEN, "%s", to_esoc_clink(dev)->name);
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}
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static ssize_t esoc_link_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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return scnprintf(buf, ESOC_LINK_LEN, "%s", to_esoc_clink(dev)->link_name);
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}
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static ssize_t esoc_link_info_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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return scnprintf(buf, ESOC_LINK_LEN, "%s", to_esoc_clink(dev)->link_info);
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}
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static DEVICE_ATTR_RO(esoc_name);
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static DEVICE_ATTR_RO(esoc_link);
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static DEVICE_ATTR_RO(esoc_link_info);
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static struct attribute *esoc_clink_attrs[] = {
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&dev_attr_esoc_name.attr,
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&dev_attr_esoc_link.attr,
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&dev_attr_esoc_link_info.attr,
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NULL
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};
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static struct attribute_group esoc_clink_attr_group = {
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.attrs = esoc_clink_attrs,
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};
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const struct attribute_group *esoc_clink_attr_groups[] = {
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&esoc_clink_attr_group,
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NULL,
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};
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static int esoc_bus_match(struct device *dev, struct device_driver *drv)
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{
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int i = 0, match = 1;
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struct esoc_clink *esoc_clink = to_esoc_clink(dev);
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struct esoc_drv *esoc_drv = to_esoc_drv(drv);
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int entries = esoc_drv->compat_entries;
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struct esoc_compat *table = esoc_drv->compat_table;
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for (i = 0; i < entries; i++) {
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if (strcasecmp(esoc_clink->name, table[i].name) == 0)
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return match;
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}
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return 0;
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}
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void *esoc_device_get_match_data(struct device *dev)
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{
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int i = 0;
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struct esoc_clink *esoc_clink = to_esoc_clink(dev);
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struct esoc_drv *esoc_drv = to_esoc_drv(dev->driver);
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int entries = esoc_drv->compat_entries;
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struct esoc_compat *table = esoc_drv->compat_table;
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for (i = 0; i < entries; i++) {
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if (strcasecmp(esoc_clink->name, table[i].name) == 0)
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return table[i].data;
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}
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return ERR_PTR(-EINVAL);
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}
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static int esoc_bus_probe(struct device *dev)
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{
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int ret;
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struct esoc_clink *esoc_clink = to_esoc_clink(dev);
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struct esoc_drv *esoc_drv = to_esoc_drv(dev->driver);
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ret = esoc_drv->probe(esoc_clink, esoc_drv);
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if (ret)
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pr_err("failed to probe %s dev\n", esoc_clink->name);
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return ret;
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}
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static int esoc_bus_remove(struct device *dev)
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{
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int ret;
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struct esoc_clink *esoc_clink = to_esoc_clink(dev);
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struct esoc_drv *esoc_drv = to_esoc_drv(dev->driver);
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ret = esoc_drv->remove(esoc_clink, esoc_drv);
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if (ret)
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pr_err("failed to remove %s dev\n", esoc_clink->name);
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return ret;
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}
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struct bus_type esoc_bus_type = {
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.name = "esoc",
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.match = esoc_bus_match,
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.dev_groups = esoc_clink_attr_groups,
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};
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struct device esoc_bus = {
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.init_name = "esoc-bus"
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};
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/* bus accessor */
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static void esoc_clink_release(struct device *dev)
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{
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struct esoc_clink *esoc_clink = to_esoc_clink(dev);
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ida_simple_remove(&esoc_ida, esoc_clink->id);
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kfree(esoc_clink);
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}
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static int esoc_clink_match_id(struct device *dev, const void *id)
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{
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struct esoc_clink *esoc_clink = to_esoc_clink(dev);
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int *esoc_id = (int *)id;
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if (esoc_clink->id == *esoc_id) {
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if (!try_module_get(esoc_clink->owner))
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return 0;
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return 1;
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}
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return 0;
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}
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static int esoc_clink_match_node(struct device *dev, const void *id)
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{
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struct esoc_clink *esoc_clink = to_esoc_clink(dev);
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if (esoc_clink->np == id) {
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if (!try_module_get(esoc_clink->owner))
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return 0;
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return 1;
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}
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return 0;
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}
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void esoc_for_each_dev(void *data, esoc_func_t fn)
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{
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bus_for_each_dev(&esoc_bus_type, NULL, data, fn);
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}
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struct esoc_clink *get_esoc_clink(int id)
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{
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struct esoc_clink *esoc_clink;
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struct device *dev;
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dev = bus_find_device(&esoc_bus_type, NULL, &id, esoc_clink_match_id);
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if (IS_ERR_OR_NULL(dev))
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return NULL;
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esoc_clink = to_esoc_clink(dev);
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return esoc_clink;
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}
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struct esoc_clink *get_esoc_clink_by_node(struct device_node *node)
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{
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struct esoc_clink *esoc_clink;
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struct device *dev;
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dev = bus_find_device(&esoc_bus_type, NULL, node, esoc_clink_match_node);
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if (IS_ERR_OR_NULL(dev))
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return NULL;
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esoc_clink = to_esoc_clink(dev);
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return esoc_clink;
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}
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void put_esoc_clink(struct esoc_clink *esoc_clink)
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{
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module_put(esoc_clink->owner);
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}
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bool esoc_req_eng_enabled(struct esoc_clink *esoc_clink)
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{
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return !esoc_clink->req_eng ? false : true;
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}
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bool esoc_cmd_eng_enabled(struct esoc_clink *esoc_clink)
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{
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return !esoc_clink->cmd_eng ? false : true;
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}
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/* ssr operations */
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int esoc_clink_register_rproc(struct esoc_clink *esoc_clink)
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{
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int ret;
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int len;
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char *rproc_name;
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len = strlen("esoc") + sizeof(esoc_clink->id);
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rproc_name = kzalloc(len, GFP_KERNEL);
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if (IS_ERR_OR_NULL(rproc_name))
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return PTR_ERR(rproc_name);
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snprintf(rproc_name, len, "esoc%d", esoc_clink->id);
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esoc_clink->dev.of_node = esoc_clink->np;
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esoc_clink->rproc = rproc_alloc(&esoc_clink->dev, rproc_name,
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&esoc_clink->ops, esoc_clink->fw, 0);
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if (!esoc_clink->rproc) {
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dev_err(&esoc_clink->dev, "unable to allocate remoteproc\n");
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ret = -ENOMEM;
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goto rproc_err;
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}
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esoc_clink->rproc->recovery_disabled = true;
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esoc_clink->rproc->auto_boot = false;
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esoc_clink->rproc_sysmon = qcom_add_sysmon_subdev(esoc_clink->rproc,
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esoc_clink->sysmon_name,
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esoc_clink->ssctl_id);
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if (IS_ERR(esoc_clink->rproc_sysmon)) {
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dev_err(&esoc_clink->dev, "Failed to register sysmon\n");
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ret = PTR_ERR(esoc_clink->rproc_sysmon);
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goto rproc_err;
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}
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ret = rproc_add(esoc_clink->rproc);
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if (ret) {
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dev_err(&esoc_clink->dev, "unable to add remoteproc\n");
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goto remove_subdev;
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}
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return 0;
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remove_subdev:
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qcom_remove_sysmon_subdev(esoc_clink->rproc_sysmon);
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rproc_err:
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kfree(rproc_name);
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return ret;
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}
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void esoc_clink_unregister_rproc(struct esoc_clink *esoc_clink)
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{
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rproc_del(esoc_clink->rproc);
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qcom_remove_sysmon_subdev(esoc_clink->rproc_sysmon);
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rproc_free(esoc_clink->rproc);
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}
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int esoc_clink_request_ssr(struct esoc_clink *esoc_clink)
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{
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if (esoc_clink->rproc->recovery_disabled)
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panic("Panicking, remoterpoc %s crashed\n", esoc_clink->rproc->name);
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rproc_report_crash(esoc_clink->rproc, RPROC_FATAL_ERROR);
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return 0;
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}
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/* bus operations */
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void esoc_clink_evt_notify(enum esoc_evt evt, struct esoc_clink *esoc_clink)
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{
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unsigned long flags;
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spin_lock_irqsave(&esoc_clink->notify_lock, flags);
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notify_esoc_clients(esoc_clink, evt);
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if (esoc_clink->req_eng && esoc_clink->req_eng->handle_clink_evt)
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esoc_clink->req_eng->handle_clink_evt(evt, esoc_clink->req_eng);
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if (esoc_clink->cmd_eng && esoc_clink->cmd_eng->handle_clink_evt)
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esoc_clink->cmd_eng->handle_clink_evt(evt, esoc_clink->cmd_eng);
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spin_unlock_irqrestore(&esoc_clink->notify_lock, flags);
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}
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void *get_esoc_clink_data(struct esoc_clink *esoc)
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{
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return esoc->clink_data;
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}
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void set_esoc_clink_data(struct esoc_clink *esoc, void *data)
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{
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esoc->clink_data = data;
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}
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void esoc_clink_queue_request(enum esoc_req req, struct esoc_clink *esoc_clink)
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{
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unsigned long flags;
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struct esoc_eng *req_eng;
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spin_lock_irqsave(&esoc_clink->notify_lock, flags);
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if (esoc_clink->req_eng != NULL) {
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req_eng = esoc_clink->req_eng;
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req_eng->handle_clink_req(req, req_eng);
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}
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spin_unlock_irqrestore(&esoc_clink->notify_lock, flags);
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}
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void esoc_set_drv_data(struct esoc_clink *esoc_clink, void *data)
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{
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dev_set_drvdata(&esoc_clink->dev, data);
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}
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void *esoc_get_drv_data(struct esoc_clink *esoc_clink)
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{
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return dev_get_drvdata(&esoc_clink->dev);
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}
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/* bus registration functions */
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void esoc_clink_unregister(struct esoc_clink *esoc_clink)
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{
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if (get_device(&esoc_clink->dev) != NULL) {
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esoc_clink_del_device(&esoc_clink->dev, NULL);
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device_unregister(&esoc_clink->dev);
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put_device(&esoc_clink->dev);
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ida_simple_remove(&esoc_ida, esoc_clink->id);
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}
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}
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int esoc_clink_register(struct esoc_clink *esoc_clink)
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{
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int id, err;
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struct device *dev;
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if (!esoc_clink->name || !esoc_clink->link_name || !esoc_clink->clink_ops) {
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dev_err(esoc_clink->parent, "invalid esoc arguments\n");
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return -EINVAL;
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}
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id = ida_simple_get(&esoc_ida, 0, ESOC_DEV_MAX, GFP_KERNEL);
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if (id < 0) {
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err = id;
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goto exit_ida;
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}
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esoc_clink->id = id;
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dev = &esoc_clink->dev;
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dev->bus = &esoc_bus_type;
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dev->release = esoc_clink_release;
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spin_lock_init(&esoc_clink->notify_lock);
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if (!esoc_clink->parent)
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dev->parent = &esoc_bus;
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else
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dev->parent = esoc_clink->parent;
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dev_set_name(dev, "esoc%d", id);
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err = device_register(dev);
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if (err) {
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dev_err(esoc_clink->parent, "esoc device register failed\n");
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put_device(dev);
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goto exit_ida;
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}
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err = esoc_clink_add_device(&esoc_clink->dev, NULL);
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if (err)
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goto exit_dev_add;
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return 0;
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exit_dev_add:
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device_unregister(dev);
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exit_ida:
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ida_simple_remove(&esoc_ida, id);
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pr_err("unable to register %s, err = %d\n", esoc_clink->name, err);
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return err;
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}
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int esoc_clink_register_req_eng(struct esoc_clink *esoc_clink,
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struct esoc_eng *eng)
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{
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if (esoc_clink->req_eng)
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return -EBUSY;
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if (!eng->handle_clink_req)
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return -EINVAL;
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esoc_clink->req_eng = eng;
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eng->esoc_clink = esoc_clink;
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esoc_clink_evt_notify(ESOC_REQ_ENG_ON, esoc_clink);
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return 0;
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}
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int esoc_clink_register_cmd_eng(struct esoc_clink *esoc_clink,
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struct esoc_eng *eng)
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{
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if (esoc_clink->cmd_eng)
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return -EBUSY;
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esoc_clink->cmd_eng = eng;
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eng->esoc_clink = esoc_clink;
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esoc_clink_evt_notify(ESOC_CMD_ENG_ON, esoc_clink);
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return 0;
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}
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void esoc_clink_unregister_req_eng(struct esoc_clink *esoc_clink,
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struct esoc_eng *eng)
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{
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esoc_clink->req_eng = NULL;
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esoc_clink_evt_notify(ESOC_REQ_ENG_OFF, esoc_clink);
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}
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void esoc_clink_unregister_cmd_eng(struct esoc_clink *esoc_clink,
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struct esoc_eng *eng)
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{
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esoc_clink->cmd_eng = NULL;
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esoc_clink_evt_notify(ESOC_CMD_ENG_OFF, esoc_clink);
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}
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int esoc_driver_register(struct esoc_drv *driver)
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{
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int ret;
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driver->driver.bus = &esoc_bus_type;
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driver->driver.probe = esoc_bus_probe;
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driver->driver.remove = esoc_bus_remove;
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ret = driver_register(&driver->driver);
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if (ret)
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return ret;
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return 0;
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}
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void esoc_driver_unregister(struct esoc_drv *driver)
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{
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driver_unregister(&driver->driver);
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}
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int __init esoc_bus_init(void)
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{
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int ret;
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ret = device_register(&esoc_bus);
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if (ret) {
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pr_err("esoc bus device register fail\n");
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return ret;
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}
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ret = bus_register(&esoc_bus_type);
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if (ret) {
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pr_err("esoc bus register fail\n");
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return ret;
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}
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pr_debug("esoc bus registration done\n");
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//TODO: add cleanup path
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ret = esoc_dev_init();
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if (ret) {
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pr_err("esoc userspace driver initialization failed\n");
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return ret;
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}
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ret = mdm_drv_init();
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if (ret) {
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pr_err("esoc failed to initialize ssr driver\n");
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return ret;
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}
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return 0;
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}
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void __exit esoc_bus_exit(void)
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{
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mdm_drv_exit();
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esoc_dev_exit();
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bus_unregister(&esoc_bus_type);
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device_unregister(&esoc_bus);
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}
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