Commit 1fb82ee8 authored by Bjorn Andersson's avatar Bjorn Andersson
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remoteproc: qcom: Introduce sysmon



The sysmon client communicates either via a dedicated SMD/GLINK channel
or via QMI encoded messages over IPCROUTER with remote processors in
order to perform graceful shutdown and inform about other remote
processors shutting down.

Acked-By: default avatarChris Lew <clew@codeaurora.org>
Signed-off-by: default avatarBjorn Andersson <bjorn.andersson@linaro.org>
parent 880f5b38
......@@ -91,6 +91,7 @@ config QCOM_ADSP_PIL
depends on QCOM_SMEM
depends on RPMSG_QCOM_SMD || (COMPILE_TEST && RPMSG_QCOM_SMD=n)
depends on RPMSG_QCOM_GLINK_SMEM || RPMSG_QCOM_GLINK_SMEM=n
depends on QCOM_SYSMON || QCOM_SYSMON=n
select MFD_SYSCON
select QCOM_MDT_LOADER
select QCOM_RPROC_COMMON
......@@ -108,6 +109,7 @@ config QCOM_Q6V5_PIL
depends on QCOM_SMEM
depends on RPMSG_QCOM_SMD || (COMPILE_TEST && RPMSG_QCOM_SMD=n)
depends on RPMSG_QCOM_GLINK_SMEM || RPMSG_QCOM_GLINK_SMEM=n
depends on QCOM_SYSMON || QCOM_SYSMON=n
select MFD_SYSCON
select QCOM_RPROC_COMMON
select QCOM_SCM
......@@ -115,12 +117,27 @@ config QCOM_Q6V5_PIL
Say y here to support the Qualcomm Peripherial Image Loader for the
Hexagon V5 based remote processors.
config QCOM_SYSMON
tristate "Qualcomm sysmon driver"
depends on RPMSG
depends on ARCH_QCOM
select QCOM_QMI_HELPERS
help
The sysmon driver implements a sysmon QMI client and a handler for
the sys_mon SMD and GLINK channel, which are used for graceful
shutdown, retrieving failure information and propagating information
about other subsystems being shut down.
Say y here if your system runs firmware on any other subsystems, e.g.
modem or DSP.
config QCOM_WCNSS_PIL
tristate "Qualcomm WCNSS Peripheral Image Loader"
depends on OF && ARCH_QCOM
depends on RPMSG_QCOM_SMD || (COMPILE_TEST && RPMSG_QCOM_SMD=n)
depends on RPMSG_QCOM_GLINK_SMEM || RPMSG_QCOM_GLINK_SMEM=n
depends on QCOM_SMEM
depends on QCOM_SYSMON || QCOM_SYSMON=n
select QCOM_MDT_LOADER
select QCOM_RPROC_COMMON
select QCOM_SCM
......
......@@ -17,6 +17,7 @@ obj-$(CONFIG_KEYSTONE_REMOTEPROC) += keystone_remoteproc.o
obj-$(CONFIG_QCOM_ADSP_PIL) += qcom_adsp_pil.o
obj-$(CONFIG_QCOM_RPROC_COMMON) += qcom_common.o
obj-$(CONFIG_QCOM_Q6V5_PIL) += qcom_q6v5_pil.o
obj-$(CONFIG_QCOM_SYSMON) += qcom_sysmon.o
obj-$(CONFIG_QCOM_WCNSS_PIL) += qcom_wcnss_pil.o
qcom_wcnss_pil-y += qcom_wcnss.o
qcom_wcnss_pil-y += qcom_wcnss_iris.o
......
......@@ -38,7 +38,10 @@ struct adsp_data {
const char *firmware_name;
int pas_id;
bool has_aggre2_clk;
const char *ssr_name;
const char *sysmon_name;
int ssctl_id;
};
struct qcom_adsp {
......@@ -75,6 +78,7 @@ struct qcom_adsp {
struct qcom_rproc_glink glink_subdev;
struct qcom_rproc_subdev smd_subdev;
struct qcom_rproc_ssr ssr_subdev;
struct qcom_sysmon *sysmon;
};
static int adsp_load(struct rproc *rproc, const struct firmware *fw)
......@@ -398,6 +402,9 @@ static int adsp_probe(struct platform_device *pdev)
qcom_add_glink_subdev(rproc, &adsp->glink_subdev);
qcom_add_smd_subdev(rproc, &adsp->smd_subdev);
qcom_add_ssr_subdev(rproc, &adsp->ssr_subdev, desc->ssr_name);
adsp->sysmon = qcom_add_sysmon_subdev(rproc,
desc->sysmon_name,
desc->ssctl_id);
ret = rproc_add(rproc);
if (ret)
......@@ -419,6 +426,7 @@ static int adsp_remove(struct platform_device *pdev)
rproc_del(adsp->rproc);
qcom_remove_glink_subdev(adsp->rproc, &adsp->glink_subdev);
qcom_remove_sysmon_subdev(adsp->sysmon);
qcom_remove_smd_subdev(adsp->rproc, &adsp->smd_subdev);
qcom_remove_ssr_subdev(adsp->rproc, &adsp->ssr_subdev);
rproc_free(adsp->rproc);
......@@ -432,6 +440,8 @@ static const struct adsp_data adsp_resource_init = {
.pas_id = 1,
.has_aggre2_clk = false,
.ssr_name = "lpass",
.sysmon_name = "adsp",
.ssctl_id = 0x14,
};
static const struct adsp_data slpi_resource_init = {
......@@ -440,6 +450,8 @@ static const struct adsp_data slpi_resource_init = {
.pas_id = 12,
.has_aggre2_clk = true,
.ssr_name = "dsps",
.sysmon_name = "slpi",
.ssctl_id = 0x16,
};
static const struct of_device_id adsp_of_match[] = {
......
......@@ -4,6 +4,9 @@
#include <linux/remoteproc.h>
#include "remoteproc_internal.h"
#include <linux/soc/qcom/qmi.h>
struct qcom_sysmon;
struct qcom_rproc_glink {
struct rproc_subdev subdev;
......@@ -39,4 +42,22 @@ void qcom_add_ssr_subdev(struct rproc *rproc, struct qcom_rproc_ssr *ssr,
const char *ssr_name);
void qcom_remove_ssr_subdev(struct rproc *rproc, struct qcom_rproc_ssr *ssr);
#if IS_ENABLED(CONFIG_QCOM_SYSMON)
struct qcom_sysmon *qcom_add_sysmon_subdev(struct rproc *rproc,
const char *name,
int ssctl_instance);
void qcom_remove_sysmon_subdev(struct qcom_sysmon *sysmon);
#else
static inline struct qcom_sysmon *qcom_add_sysmon_subdev(struct rproc *rproc,
const char *name,
int ssctl_instance)
{
return NULL;
}
static inline void qcom_remove_sysmon_subdev(struct qcom_sysmon *sysmon)
{
}
#endif
#endif
......@@ -168,6 +168,7 @@ struct q6v5 {
struct qcom_rproc_subdev smd_subdev;
struct qcom_rproc_ssr ssr_subdev;
struct qcom_sysmon *sysmon;
bool need_mem_protection;
int mpss_perm;
int mba_perm;
......@@ -1209,6 +1210,7 @@ static int q6v5_probe(struct platform_device *pdev)
qproc->mba_perm = BIT(QCOM_SCM_VMID_HLOS);
qcom_add_smd_subdev(rproc, &qproc->smd_subdev);
qcom_add_ssr_subdev(rproc, &qproc->ssr_subdev, "mpss");
qproc->sysmon = qcom_add_sysmon_subdev(rproc, "modem", 0x12);
ret = rproc_add(rproc);
if (ret)
......@@ -1228,6 +1230,7 @@ static int q6v5_remove(struct platform_device *pdev)
rproc_del(qproc->rproc);
qcom_remove_sysmon_subdev(qproc->sysmon);
qcom_remove_smd_subdev(qproc->rproc, &qproc->smd_subdev);
qcom_remove_ssr_subdev(qproc->rproc, &qproc->ssr_subdev);
rproc_free(qproc->rproc);
......
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2017, Linaro Ltd.
*/
#include <linux/firmware.h>
#include <linux/module.h>
#include <linux/notifier.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/notifier.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/remoteproc/qcom_rproc.h>
#include <linux/rpmsg.h>
#include "qcom_common.h"
static BLOCKING_NOTIFIER_HEAD(sysmon_notifiers);
struct qcom_sysmon {
struct rproc_subdev subdev;
struct rproc *rproc;
struct list_head node;
const char *name;
int ssctl_version;
int ssctl_instance;
struct notifier_block nb;
struct device *dev;
struct rpmsg_endpoint *ept;
struct completion comp;
struct mutex lock;
bool ssr_ack;
struct qmi_handle qmi;
struct sockaddr_qrtr ssctl;
};
static DEFINE_MUTEX(sysmon_lock);
static LIST_HEAD(sysmon_list);
/**
* sysmon_send_event() - send notification of other remote's SSR event
* @sysmon: sysmon context
* @name: other remote's name
*/
static void sysmon_send_event(struct qcom_sysmon *sysmon, const char *name)
{
char req[50];
int len;
int ret;
len = snprintf(req, sizeof(req), "ssr:%s:before_shutdown", name);
if (len >= sizeof(req))
return;
mutex_lock(&sysmon->lock);
reinit_completion(&sysmon->comp);
sysmon->ssr_ack = false;
ret = rpmsg_send(sysmon->ept, req, len);
if (ret < 0) {
dev_err(sysmon->dev, "failed to send sysmon event\n");
goto out_unlock;
}
ret = wait_for_completion_timeout(&sysmon->comp,
msecs_to_jiffies(5000));
if (!ret) {
dev_err(sysmon->dev, "timeout waiting for sysmon ack\n");
goto out_unlock;
}
if (!sysmon->ssr_ack)
dev_err(sysmon->dev, "unexpected response to sysmon event\n");
out_unlock:
mutex_unlock(&sysmon->lock);
}
/**
* sysmon_request_shutdown() - request graceful shutdown of remote
* @sysmon: sysmon context
*/
static void sysmon_request_shutdown(struct qcom_sysmon *sysmon)
{
char *req = "ssr:shutdown";
int ret;
mutex_lock(&sysmon->lock);
reinit_completion(&sysmon->comp);
sysmon->ssr_ack = false;
ret = rpmsg_send(sysmon->ept, req, strlen(req) + 1);
if (ret < 0) {
dev_err(sysmon->dev, "send sysmon shutdown request failed\n");
goto out_unlock;
}
ret = wait_for_completion_timeout(&sysmon->comp,
msecs_to_jiffies(5000));
if (!ret) {
dev_err(sysmon->dev, "timeout waiting for sysmon ack\n");
goto out_unlock;
}
if (!sysmon->ssr_ack)
dev_err(sysmon->dev,
"unexpected response to sysmon shutdown request\n");
out_unlock:
mutex_unlock(&sysmon->lock);
}
static int sysmon_callback(struct rpmsg_device *rpdev, void *data, int count,
void *priv, u32 addr)
{
struct qcom_sysmon *sysmon = priv;
const char *ssr_ack = "ssr:ack";
const int ssr_ack_len = strlen(ssr_ack) + 1;
if (!sysmon)
return -EINVAL;
if (count >= ssr_ack_len && !memcmp(data, ssr_ack, ssr_ack_len))
sysmon->ssr_ack = true;
complete(&sysmon->comp);
return 0;
}
#define SSCTL_SHUTDOWN_REQ 0x21
#define SSCTL_SUBSYS_EVENT_REQ 0x23
#define SSCTL_MAX_MSG_LEN 7
#define SSCTL_SUBSYS_NAME_LENGTH 15
enum {
SSCTL_SSR_EVENT_BEFORE_POWERUP,
SSCTL_SSR_EVENT_AFTER_POWERUP,
SSCTL_SSR_EVENT_BEFORE_SHUTDOWN,
SSCTL_SSR_EVENT_AFTER_SHUTDOWN,
};
enum {
SSCTL_SSR_EVENT_FORCED,
SSCTL_SSR_EVENT_GRACEFUL,
};
struct ssctl_shutdown_resp {
struct qmi_response_type_v01 resp;
};
static struct qmi_elem_info ssctl_shutdown_resp_ei[] = {
{
.data_type = QMI_STRUCT,
.elem_len = 1,
.elem_size = sizeof(struct qmi_response_type_v01),
.array_type = NO_ARRAY,
.tlv_type = 0x02,
.offset = offsetof(struct ssctl_shutdown_resp, resp),
.ei_array = qmi_response_type_v01_ei,
},
{}
};
struct ssctl_subsys_event_req {
u8 subsys_name_len;
char subsys_name[SSCTL_SUBSYS_NAME_LENGTH];
u32 event;
u8 evt_driven_valid;
u32 evt_driven;
};
static struct qmi_elem_info ssctl_subsys_event_req_ei[] = {
{
.data_type = QMI_DATA_LEN,
.elem_len = 1,
.elem_size = sizeof(uint8_t),
.array_type = NO_ARRAY,
.tlv_type = 0x01,
.offset = offsetof(struct ssctl_subsys_event_req,
subsys_name_len),
.ei_array = NULL,
},
{
.data_type = QMI_UNSIGNED_1_BYTE,
.elem_len = SSCTL_SUBSYS_NAME_LENGTH,
.elem_size = sizeof(char),
.array_type = VAR_LEN_ARRAY,
.tlv_type = 0x01,
.offset = offsetof(struct ssctl_subsys_event_req,
subsys_name),
.ei_array = NULL,
},
{
.data_type = QMI_SIGNED_4_BYTE_ENUM,
.elem_len = 1,
.elem_size = sizeof(uint32_t),
.array_type = NO_ARRAY,
.tlv_type = 0x02,
.offset = offsetof(struct ssctl_subsys_event_req,
event),
.ei_array = NULL,
},
{
.data_type = QMI_OPT_FLAG,
.elem_len = 1,
.elem_size = sizeof(uint8_t),
.array_type = NO_ARRAY,
.tlv_type = 0x10,
.offset = offsetof(struct ssctl_subsys_event_req,
evt_driven_valid),
.ei_array = NULL,
},
{
.data_type = QMI_SIGNED_4_BYTE_ENUM,
.elem_len = 1,
.elem_size = sizeof(uint32_t),
.array_type = NO_ARRAY,
.tlv_type = 0x10,
.offset = offsetof(struct ssctl_subsys_event_req,
evt_driven),
.ei_array = NULL,
},
{}
};
struct ssctl_subsys_event_resp {
struct qmi_response_type_v01 resp;
};
static struct qmi_elem_info ssctl_subsys_event_resp_ei[] = {
{
.data_type = QMI_STRUCT,
.elem_len = 1,
.elem_size = sizeof(struct qmi_response_type_v01),
.array_type = NO_ARRAY,
.tlv_type = 0x02,
.offset = offsetof(struct ssctl_subsys_event_resp,
resp),
.ei_array = qmi_response_type_v01_ei,
},
{}
};
/**
* ssctl_request_shutdown() - request shutdown via SSCTL QMI service
* @sysmon: sysmon context
*/
static void ssctl_request_shutdown(struct qcom_sysmon *sysmon)
{
struct ssctl_shutdown_resp resp;
struct qmi_txn txn;
int ret;
ret = qmi_txn_init(&sysmon->qmi, &txn, ssctl_shutdown_resp_ei, &resp);
if (ret < 0) {
dev_err(sysmon->dev, "failed to allocate QMI txn\n");
return;
}
ret = qmi_send_request(&sysmon->qmi, &sysmon->ssctl, &txn,
SSCTL_SHUTDOWN_REQ, 0, NULL, NULL);
if (ret < 0) {
dev_err(sysmon->dev, "failed to send shutdown request\n");
qmi_txn_cancel(&txn);
return;
}
ret = qmi_txn_wait(&txn, 5 * HZ);
if (ret < 0)
dev_err(sysmon->dev, "failed receiving QMI response\n");
else if (resp.resp.result)
dev_err(sysmon->dev, "shutdown request failed\n");
else
dev_dbg(sysmon->dev, "shutdown request completed\n");
}
/**
* ssctl_send_event() - send notification of other remote's SSR event
* @sysmon: sysmon context
* @name: other remote's name
*/
static void ssctl_send_event(struct qcom_sysmon *sysmon, const char *name)
{
struct ssctl_subsys_event_resp resp;
struct ssctl_subsys_event_req req;
struct qmi_txn txn;
int ret;
memset(&resp, 0, sizeof(resp));
ret = qmi_txn_init(&sysmon->qmi, &txn, ssctl_subsys_event_resp_ei, &resp);
if (ret < 0) {
dev_err(sysmon->dev, "failed to allocate QMI txn\n");
return;
}
memset(&req, 0, sizeof(req));
strlcpy(req.subsys_name, name, sizeof(req.subsys_name));
req.subsys_name_len = strlen(req.subsys_name);
req.event = SSCTL_SSR_EVENT_BEFORE_SHUTDOWN;
req.evt_driven_valid = true;
req.evt_driven = SSCTL_SSR_EVENT_FORCED;
ret = qmi_send_request(&sysmon->qmi, &sysmon->ssctl, &txn,
SSCTL_SUBSYS_EVENT_REQ, 40,
ssctl_subsys_event_req_ei, &req);
if (ret < 0) {
dev_err(sysmon->dev, "failed to send shutdown request\n");
qmi_txn_cancel(&txn);
return;
}
ret = qmi_txn_wait(&txn, 5 * HZ);
if (ret < 0)
dev_err(sysmon->dev, "failed receiving QMI response\n");
else if (resp.resp.result)
dev_err(sysmon->dev, "ssr event send failed\n");
else
dev_dbg(sysmon->dev, "ssr event send completed\n");
}
/**
* ssctl_new_server() - QMI callback indicating a new service
* @qmi: QMI handle
* @svc: service information
*
* Return: 0 if we're interested in this service, -EINVAL otherwise.
*/
static int ssctl_new_server(struct qmi_handle *qmi, struct qmi_service *svc)
{
struct qcom_sysmon *sysmon = container_of(qmi, struct qcom_sysmon, qmi);
switch (svc->version) {
case 1:
if (svc->instance != 0)
return -EINVAL;
if (strcmp(sysmon->name, "modem"))
return -EINVAL;
break;
case 2:
if (svc->instance != sysmon->ssctl_instance)
return -EINVAL;
break;
default:
return -EINVAL;
};
sysmon->ssctl_version = svc->version;
sysmon->ssctl.sq_family = AF_QIPCRTR;
sysmon->ssctl.sq_node = svc->node;
sysmon->ssctl.sq_port = svc->port;
svc->priv = sysmon;
return 0;
}
/**
* ssctl_del_server() - QMI callback indicating that @svc is removed
* @qmi: QMI handle
* @svc: service information
*/
static void ssctl_del_server(struct qmi_handle *qmi, struct qmi_service *svc)
{
struct qcom_sysmon *sysmon = svc->priv;
sysmon->ssctl_version = 0;
}
static const struct qmi_ops ssctl_ops = {
.new_server = ssctl_new_server,
.del_server = ssctl_del_server,
};
static int sysmon_start(struct rproc_subdev *subdev)
{
return 0;
}
static void sysmon_stop(struct rproc_subdev *subdev, bool crashed)
{
struct qcom_sysmon *sysmon = container_of(subdev, struct qcom_sysmon, subdev);
blocking_notifier_call_chain(&sysmon_notifiers, 0, (void *)sysmon->name);
/* Don't request graceful shutdown if we've crashed */
if (crashed)
return;
if (sysmon->ssctl_version)
ssctl_request_shutdown(sysmon);
else if (sysmon->ept)
sysmon_request_shutdown(sysmon);
}
/**
* sysmon_notify() - notify sysmon target of another's SSR
* @nb: notifier_block associated with sysmon instance
* @event: unused
* @data: SSR identifier of the remote that is going down
*/
static int sysmon_notify(struct notifier_block *nb, unsigned long event,
void *data)
{
struct qcom_sysmon *sysmon = container_of(nb, struct qcom_sysmon, nb);
struct rproc *rproc = sysmon->rproc;
const char *ssr_name = data;
/* Skip non-running rprocs and the originating instance */
if (rproc->state != RPROC_RUNNING || !strcmp(data, sysmon->name)) {
dev_dbg(sysmon->dev, "not notifying %s\n", sysmon->name);
return NOTIFY_DONE;
}
/* Only SSCTL version 2 supports SSR events */
if (sysmon->ssctl_version == 2)
ssctl_send_event(sysmon, ssr_name);
else if (sysmon->ept)
sysmon_send_event(sysmon, ssr_name);
return NOTIFY_DONE;
}
/**
* qcom_add_sysmon_subdev() - create a sysmon subdev for the given remoteproc
* @rproc: rproc context to associate the subdev with
* @name: name of this subdev, to use in SSR
* @ssctl_instance: instance id of the ssctl QMI service
*
* Return: A new qcom_sysmon object, or NULL on failure
*/
struct qcom_sysmon *qcom_add_sysmon_subdev(struct rproc *rproc,
const char *name,
int ssctl_instance)
{
struct qcom_sysmon *sysmon;
int ret;
sysmon = kzalloc(sizeof(*sysmon), GFP_KERNEL);
if (!sysmon)
return NULL;
sysmon->dev = rproc->dev.parent;
sysmon->rproc = rproc;