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Message-ID: <0adaa065-3883-ebfe-8259-05ebdbd821eb@quicinc.com>
Date: Mon, 12 Feb 2024 15:54:27 +0530
From: Sibi Sankar <quic_sibis@...cinc.com>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
CC: <sudeep.holla@....com>, <cristian.marussi@....com>, <andersson@...nel.org>,
<konrad.dybcio@...aro.org>, <jassisinghbrar@...il.com>,
<robh+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
<linux-kernel@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
<devicetree@...r.kernel.org>, <quic_rgottimu@...cinc.com>,
<quic_kshivnan@...cinc.com>, <conor+dt@...nel.org>,
Amir Vajid <avajid@...cinc.com>
Subject: Re: [RFC 4/7] soc: qcom: Utilize qcom scmi vendor protocol for bus
dvfs
On 1/18/24 02:11, Dmitry Baryshkov wrote:
> On Wed, 17 Jan 2024 at 19:36, Sibi Sankar <quic_sibis@...cinc.com> wrote:
>>
>> From: Shivnandan Kumar <quic_kshivnan@...cinc.com>
>>
>> This patch introduces a client driver that interacts with the SCMI QCOM
>
> git grep This.patch Documentation/process/
>
>> vendor protocol and passes on the required tuneables to start various
>> features running on the SCMI controller.
>
> Is there any word about the 'memlat'? No. Unless one reads into the
> patch, one can not come up with the idea of what is being introduced.
ack, will fix it in the re-spin.
>
>>
>> Signed-off-by: Shivnandan Kumar <quic_kshivnan@...cinc.com>
>> Co-developed-by: Ramakrishna Gottimukkula <quic_rgottimu@...cinc.com>
>> Signed-off-by: Ramakrishna Gottimukkula <quic_rgottimu@...cinc.com>
>> Co-developed-by: Amir Vajid <avajid@...cinc.com>
>> Signed-off-by: Amir Vajid <avajid@...cinc.com>
>> Co-developed-by: Sibi Sankar <quic_sibis@...cinc.com>
>> Signed-off-by: Sibi Sankar <quic_sibis@...cinc.com>
>> ---
>> drivers/soc/qcom/Kconfig | 10 +
>> drivers/soc/qcom/Makefile | 1 +
>> drivers/soc/qcom/qcom_scmi_client.c | 486 ++++++++++++++++++++++++++++
>
> Should it go to drivers/firmware/arm_scmi instead? Or maybe to drivers/devfreq?
I don't think it should go into arm_scmi unless Sudeep wants it there.
As for drivers/devfreq, I would have moved it there if this driver
benfitted being classified as a devfreq device. We can't use any of
the available governors on it and the tuneables appear way too custom.
These are the reasons why I placed it in drivers/soc/qcom instead.
>
>> 3 files changed, 497 insertions(+)
>> create mode 100644 drivers/soc/qcom/qcom_scmi_client.c
>>
>> diff --git a/drivers/soc/qcom/Kconfig b/drivers/soc/qcom/Kconfig
>> index c6ca4de42586..1530558aebfb 100644
>> --- a/drivers/soc/qcom/Kconfig
>> +++ b/drivers/soc/qcom/Kconfig
>> @@ -264,6 +264,16 @@ config QCOM_ICC_BWMON
>> the fixed bandwidth votes from cpufreq (CPU nodes) thus achieve high
>> memory throughput even with lower CPU frequencies.
>>
>> +config QCOM_SCMI_CLIENT
>> + tristate "Qualcomm Technologies Inc. SCMI client driver"
>> + depends on QCOM_SCMI_VENDOR_PROTOCOL || COMPILE_TEST
>> + default n
>> + help
>> + SCMI client driver registers for SCMI QCOM vendor protocol.
>> +
>> + This driver interacts with the vendor protocol and passes on the required
>> + tuneables to start various features running on the SCMI controller.
>> +
>> config QCOM_INLINE_CRYPTO_ENGINE
>> tristate
>> select QCOM_SCM
>> diff --git a/drivers/soc/qcom/Makefile b/drivers/soc/qcom/Makefile
>> index 05b3d54e8dc9..c2a51293c886 100644
>> --- a/drivers/soc/qcom/Makefile
>> +++ b/drivers/soc/qcom/Makefile
>> @@ -32,5 +32,6 @@ obj-$(CONFIG_QCOM_APR) += apr.o
>> obj-$(CONFIG_QCOM_LLCC) += llcc-qcom.o
>> obj-$(CONFIG_QCOM_KRYO_L2_ACCESSORS) += kryo-l2-accessors.o
>> obj-$(CONFIG_QCOM_ICC_BWMON) += icc-bwmon.o
>> +obj-$(CONFIG_QCOM_SCMI_CLIENT) += qcom_scmi_client.o
>> qcom_ice-objs += ice.o
>> obj-$(CONFIG_QCOM_INLINE_CRYPTO_ENGINE) += qcom_ice.o
>> diff --git a/drivers/soc/qcom/qcom_scmi_client.c b/drivers/soc/qcom/qcom_scmi_client.c
>> new file mode 100644
>> index 000000000000..418aa7900496
>> --- /dev/null
>> +++ b/drivers/soc/qcom/qcom_scmi_client.c
>> @@ -0,0 +1,486 @@
>> +// SPDX-License-Identifier: GPL-2.0-only
>> +/*
>> + * Copyright (c) 2024, The Linux Foundation. All rights reserved.
>> + */
>> +
>> +#include <linux/cpu.h>
>> +#include <linux/err.h>
>> +#include <linux/errno.h>
>> +#include <linux/init.h>
>> +#include <linux/kernel.h>
>> +#include <linux/module.h>
>> +#include <linux/of.h>
>> +#include <linux/platform_device.h>
>> +#include <linux/qcom_scmi_vendor.h>
>> +#include <linux/scmi_protocol.h>
>> +
>> +#define MAX_MEMORY_TYPES 3
>> +#define MEMLAT_ALGO_STR 0x74616C6D656D /* "memlat" */
>> +#define INVALID_IDX 0xFF
>> +#define MAX_NAME_LEN 20
>> +#define MAX_MAP_ENTRIES 6
>> +#define MAX_MONITOR_CNT 4
>> +#define SCMI_VENDOR_MSG_START 3
>> +#define SCMI_VENDOR_MSG_MODULE_START 16
>> +
>> +enum scmi_memlat_protocol_cmd {
>> + MEMLAT_SET_LOG_LEVEL = SCMI_VENDOR_MSG_START,
>> + MEMLAT_FLUSH_LOGBUF,
>> + MEMLAT_SET_MEM_GROUP = SCMI_VENDOR_MSG_MODULE_START,
>> + MEMLAT_SET_MONITOR,
>> + MEMLAT_SET_COMMON_EV_MAP,
>> + MEMLAT_SET_GRP_EV_MAP,
>> + MEMLAT_ADAPTIVE_LOW_FREQ,
>> + MEMLAT_ADAPTIVE_HIGH_FREQ,
>> + MEMLAT_GET_ADAPTIVE_CUR_FREQ,
>> + MEMLAT_IPM_CEIL,
>> + MEMLAT_FE_STALL_FLOOR,
>> + MEMLAT_BE_STALL_FLOOR,
>> + MEMLAT_WB_PCT,
>> + MEMLAT_IPM_FILTER,
>> + MEMLAT_FREQ_SCALE_PCT,
>> + MEMLAT_FREQ_SCALE_CEIL_MHZ,
>> + MEMLAT_FREQ_SCALE_FLOOR_MHZ,
>> + MEMLAT_SAMPLE_MS,
>> + MEMLAT_MON_FREQ_MAP,
>> + MEMLAT_SET_MIN_FREQ,
>> + MEMLAT_SET_MAX_FREQ,
>> + MEMLAT_GET_CUR_FREQ,
>> + MEMLAT_START_TIMER,
>> + MEMLAT_STOP_TIMER,
>> + MEMLAT_GET_TIMESTAMP,
>> + MEMLAT_MAX_MSG
>> +};
>> +
>> +struct map_table {
>> + u16 v1;
>> + u16 v2;
>> +};
>> +
>
> Any documentation for these structures? It won't bite you, but it will
> help reviewers and other developers.
ack
>
>> +struct map_param_msg {
>> + u32 hw_type;
>> + u32 mon_idx;
>> + u32 nr_rows;
>> + struct map_table tbl[MAX_MAP_ENTRIES];
>> +} __packed;
>> +
>> +struct node_msg {
>> + u32 cpumask;
>> + u32 hw_type;
>> + u32 mon_type;
>> + u32 mon_idx;
>> + char mon_name[MAX_NAME_LEN];
>> +};
>> +
>> +struct scalar_param_msg {
>> + u32 hw_type;
>> + u32 mon_idx;
>> + u32 val;
>> +};
>> +
>> +enum common_ev_idx {
>> + INST_IDX,
>> + CYC_IDX,
>> + FE_STALL_IDX,
>> + BE_STALL_IDX,
>> + NUM_COMMON_EVS
>> +};
>> +
>> +enum grp_ev_idx {
>> + MISS_IDX,
>> + WB_IDX,
>> + ACC_IDX,
>> + NUM_GRP_EVS
>> +};
>> +
>> +#define EV_CPU_CYCLES 0
>> +#define EV_INST_RETIRED 2
>> +#define EV_L2_D_RFILL 5
>> +
>> +struct ev_map_msg {
>> + u32 num_evs;
>> + u32 hw_type;
>> + u32 cid[NUM_COMMON_EVS];
>> +};
>> +
>> +struct cpufreq_memfreq_map {
>> + unsigned int cpufreq_mhz;
>> + unsigned int memfreq_khz;
>> +};
>> +
>> +struct scmi_monitor_info {
>> + struct cpufreq_memfreq_map *freq_map;
>> + char mon_name[MAX_NAME_LEN];
>> + u32 mon_idx;
>> + u32 mon_type;
>> + u32 ipm_ceil;
>> + u32 mask;
>> + u32 freq_map_len;
>> +};
>> +
>> +struct scmi_memory_info {
>> + struct scmi_monitor_info *monitor[MAX_MONITOR_CNT];
>> + u32 hw_type;
>> + int monitor_cnt;
>> + u32 min_freq;
>> + u32 max_freq;
>> +};
>> +
>> +struct scmi_memlat_info {
>> + struct scmi_protocol_handle *ph;
>> + const struct qcom_scmi_vendor_ops *ops;
>> + struct scmi_memory_info *memory[MAX_MEMORY_TYPES];
>> + int memory_cnt;
>> +};
>> +
>> +static int get_mask(struct device_node *np, u32 *mask)
>> +{
>> + struct device_node *dev_phandle;
>> + struct device *cpu_dev;
>> + int cpu, i = 0;
>> + int ret = -ENODEV;
>> +
>> + dev_phandle = of_parse_phandle(np, "qcom,cpulist", i++);
>> + while (dev_phandle) {
>> + for_each_possible_cpu(cpu) {
>> + cpu_dev = get_cpu_device(cpu);
>> + if (cpu_dev && cpu_dev->of_node == dev_phandle) {
>> + *mask |= BIT(cpu);
>> + ret = 0;
>> + break;
>> + }
>> + }
>
> There is of_cpu_node_to_id(). No need to reinvent it.
ack
>
>> + dev_phandle = of_parse_phandle(np, "qcom,cpulist", i++);
>> + }
>> +
>> + return ret;
>> +}
>> +
>> +static struct cpufreq_memfreq_map *init_cpufreq_memfreq_map(struct device *dev,
>> + struct device_node *of_node,
>> + u32 *cnt)
>> +{
>> + int len, nf, i, j;
>> + u32 data;
>> + struct cpufreq_memfreq_map *tbl;
>> + int ret;
>> +
>> + if (!of_find_property(of_node, "qcom,cpufreq-memfreq-tbl", &len))
>> + return NULL;
>> + len /= sizeof(data);
>> +
>> + if (len % 2 || len == 0)
>> + return NULL;
>> + nf = len / 2;
>> +
>> + tbl = devm_kzalloc(dev, (nf + 1) * sizeof(struct cpufreq_memfreq_map),
>> + GFP_KERNEL);
>> + if (!tbl)
>> + return NULL;
>> +
>> + for (i = 0, j = 0; i < nf; i++, j += 2) {
>> + ret = of_property_read_u32_index(of_node, "qcom,cpufreq-memfreq-tbl",
>> + j, &data);
>> + if (ret < 0)
>> + return NULL;
>> + tbl[i].cpufreq_mhz = data / 1000;
>> +
>> + ret = of_property_read_u32_index(of_node, "qcom,cpufreq-memfreq-tbl",
>> + j + 1, &data);
>> + if (ret < 0)
>> + return NULL;
>> +
>> + tbl[i].memfreq_khz = data;
>> + pr_debug("Entry%d CPU:%u, Mem:%u\n", i, tbl[i].cpufreq_mhz,
>> + tbl[i].memfreq_khz);
>> + }
>> + *cnt = nf;
>> + tbl[i].cpufreq_mhz = 0;
>
> This looks like a lame version of the OPP table.
I didn't know listing multiple frequencies in a opp was allowed. We can
probably get away with it here since we just parse the data here and not
populate data in the opp core.
>
>> +
>> + return tbl;
>> +}
>> +
>> +static int process_scmi_memlat_of_node(struct scmi_device *sdev, struct scmi_memlat_info *info)
>> +{
>> + struct device_node *memlat_np, *memory_np, *monitor_np;
>> + struct scmi_memory_info *memory;
>> + struct scmi_monitor_info *monitor;
>> + int ret = 0, i = 0, j;
>> + u32 memfreq[2];
>> +
>> + of_node_get(sdev->handle->dev->of_node);
>> + memlat_np = of_find_node_by_name(sdev->handle->dev->of_node, "memlat");
>> +
>> + info->memory_cnt = of_get_child_count(memlat_np);
>> + if (info->memory_cnt <= 0)
>> + pr_err("No memory nodes present\n");
>> +
>> + for_each_child_of_node(memlat_np, memory_np) {
>> + memory = devm_kzalloc(&sdev->dev, sizeof(*memory), GFP_KERNEL);
>> + if (!memory) {
>> + ret = -ENOMEM;
>> + goto err;
>> + }
>> +
>> + ret = of_property_read_u32(memory_np, "reg", &memory->hw_type);
>> + if (ret) {
>> + pr_err("Failed to read memory type\n");
>> + goto err;
>> + }
>> +
>> + memory->monitor_cnt = of_get_child_count(memory_np);
>> + if (memory->monitor_cnt <= 0) {
>> + pr_err("No monitor nodes present\n");
>> + ret = -EINVAL;
>> + goto err;
>> + }
>> +
>> + ret = of_property_read_u32_array(memory_np, "freq-table-khz", memfreq, 2);
>> + if (ret && (ret != -EINVAL)) {
>> + pr_err("Failed to read min/max freq %d\n", ret);
>> + goto err;
>> + }
>
> foo-min-frequency and foo-max-frequency please.
ack
>
>> +
>> + memory->min_freq = memfreq[0];
>> + memory->max_freq = memfreq[1];
>> + info->memory[i] = memory;
>> + j = 0;
>> + i++;
>> +
>> + for_each_child_of_node(memory_np, monitor_np) {
>> + monitor = devm_kzalloc(&sdev->dev, sizeof(*monitor), GFP_KERNEL);
>> + if (!monitor) {
>> + ret = -ENOMEM;
>> + goto err;
>> + }
>> +
>> + monitor->mon_type = (of_property_read_bool(monitor_np, "qcom,compute-mon")) ? 1 : 0;
>> + monitor->ipm_ceil = (of_property_read_bool(monitor_np, "qcom,compute-mon")) ? 0 : 20000000;
>
> Huh?
lol, will add more comments.
>
>> +
>> + if (get_mask(monitor_np, &monitor->mask)) {
>> + pr_err("Failed to populate cpu mask %d\n", ret);
>> + goto err;
>> + }
>> +
>> + monitor->freq_map = init_cpufreq_memfreq_map(&sdev->dev, monitor_np,
>> + &monitor->freq_map_len);
>> + snprintf(monitor->mon_name, MAX_NAME_LEN, "monitor-%d", j);
>> + monitor->mon_idx = j;
>> +
>> + memory->monitor[j] = monitor;
>> + j++;
>> + }
>> + }
>> +
>> + return 0;
>> +
>> +err:
>> + of_node_put(memlat_np);
>> +
>> + return ret;
>> +}
>> +
>> +static int configure_cpucp_common_events(struct scmi_memlat_info *info)
>> +{
>> + const struct qcom_scmi_vendor_ops *ops = info->ops;
>> + u8 ev_map[NUM_COMMON_EVS];
>> + struct ev_map_msg msg;
>> + int ret;
>> +
>> + memset(ev_map, 0xFF, NUM_COMMON_EVS);
>> +
>> + msg.num_evs = NUM_COMMON_EVS;
>> + msg.hw_type = INVALID_IDX;
>> + msg.cid[INST_IDX] = EV_INST_RETIRED;
>> + msg.cid[CYC_IDX] = EV_CPU_CYCLES;
>> + msg.cid[FE_STALL_IDX] = INVALID_IDX;
>> + msg.cid[BE_STALL_IDX] = INVALID_IDX;
>> +
>> + ret = ops->set_param(info->ph, &msg, MEMLAT_ALGO_STR, MEMLAT_SET_COMMON_EV_MAP,
>> + sizeof(msg));
>> + return ret;
>> +}
>> +
>> +static int configure_cpucp_grp(struct scmi_memlat_info *info, int memory_index)
>> +{
>> + const struct qcom_scmi_vendor_ops *ops = info->ops;
>> + struct scmi_memory_info *memory = info->memory[memory_index];
>> + struct ev_map_msg ev_msg;
>> + u8 ev_map[NUM_GRP_EVS];
>> + struct node_msg msg;
>> + int ret;
>> +
>> + msg.cpumask = 0;
>> + msg.hw_type = memory->hw_type;
>> + msg.mon_type = 0;
>> + msg.mon_idx = 0;
>> + ret = ops->set_param(info->ph, &msg, MEMLAT_ALGO_STR, MEMLAT_SET_MEM_GROUP, sizeof(msg));
>> + if (ret < 0) {
>> + pr_err("Failed to configure mem type %d\n", memory->hw_type);
>> + return ret;
>> + }
>> +
>> + memset(ev_map, 0xFF, NUM_GRP_EVS);
>> + ev_msg.num_evs = NUM_GRP_EVS;
>> + ev_msg.hw_type = memory->hw_type;
>> + ev_msg.cid[MISS_IDX] = EV_L2_D_RFILL;
>> + ev_msg.cid[WB_IDX] = INVALID_IDX;
>> + ev_msg.cid[ACC_IDX] = INVALID_IDX;
>> + ret = ops->set_param(info->ph, &ev_msg, MEMLAT_ALGO_STR, MEMLAT_SET_GRP_EV_MAP,
>> + sizeof(ev_msg));
>> + if (ret < 0) {
>> + pr_err("Failed to configure event map for mem type %d\n", memory->hw_type);
>> + return ret;
>> + }
>> +
>> + return ret;
>> +}
>> +
>> +static int configure_cpucp_mon(struct scmi_memlat_info *info, int memory_index, int monitor_index)
>> +{
>> + const struct qcom_scmi_vendor_ops *ops = info->ops;
>> + struct scmi_memory_info *memory = info->memory[memory_index];
>> + struct scmi_monitor_info *monitor = memory->monitor[monitor_index];
>> + struct scalar_param_msg scalar_msg;
>> + struct map_param_msg map_msg;
>> + struct node_msg msg;
>> + int ret;
>> + int i;
>> +
>> + msg.cpumask = monitor->mask;
>> + msg.hw_type = memory->hw_type;
>> + msg.mon_type = monitor->mon_type;
>> + msg.mon_idx = monitor->mon_idx;
>> + strscpy(msg.mon_name, monitor->mon_name, sizeof(msg.mon_name));
>> + ret = ops->set_param(info->ph, &msg, MEMLAT_ALGO_STR, MEMLAT_SET_MONITOR, sizeof(msg));
>> + if (ret < 0) {
>> + pr_err("Failed to configure monitor %s\n", monitor->mon_name);
>> + return ret;
>> + }
>> +
>> + scalar_msg.hw_type = memory->hw_type;
>> + scalar_msg.mon_idx = monitor->mon_idx;
>> + scalar_msg.val = monitor->ipm_ceil;
>> + ret = ops->set_param(info->ph, &scalar_msg, MEMLAT_ALGO_STR, MEMLAT_IPM_CEIL,
>> + sizeof(scalar_msg));
>> + if (ret < 0) {
>> + pr_err("Failed to set ipm ceil for %s\n", monitor->mon_name);
>> + return ret;
>> + }
>> +
>> + map_msg.hw_type = memory->hw_type;
>> + map_msg.mon_idx = monitor->mon_idx;
>> + map_msg.nr_rows = monitor->freq_map_len;
>> + for (i = 0; i < monitor->freq_map_len; i++) {
>> + map_msg.tbl[i].v1 = monitor->freq_map[i].cpufreq_mhz;
>> + map_msg.tbl[i].v2 = monitor->freq_map[i].memfreq_khz / 1000;
>> + }
>
> So this table goes 1:1 to the firmware? Is it going to be the same for
> all versions of the SoC? If so, it might be better to turn it into the
> static data inside the driver. If it doesn't change, there is no need
> to put it to DT.
The table does go directly to the firmware but obviously varies across
SoCs. Also since it's a SCMI client driver we don't have a way to
distinguish between SoCs based on compatibles. So it made more sense to
move it to the device tree instead.
-Sibi
>
>> + ret = ops->set_param(info->ph, &map_msg, MEMLAT_ALGO_STR, MEMLAT_MON_FREQ_MAP,
>> + sizeof(map_msg));
>> + if (ret < 0) {
>> + pr_err("Failed to configure freq_map for %s\n", monitor->mon_name);
>> + return ret;
>> + }
>> +
>> + scalar_msg.hw_type = memory->hw_type;
>> + scalar_msg.mon_idx = monitor->mon_idx;
>> + scalar_msg.val = memory->min_freq;
>> + ret = ops->set_param(info->ph, &scalar_msg, MEMLAT_ALGO_STR, MEMLAT_SET_MIN_FREQ,
>> + sizeof(scalar_msg));
>> + if (ret < 0) {
>> + pr_err("Failed to set min_freq for %s\n", monitor->mon_name);
>> + return ret;
>> + }
>> +
>> + scalar_msg.hw_type = memory->hw_type;
>> + scalar_msg.mon_idx = monitor->mon_idx;
>> + scalar_msg.val = memory->max_freq;
>> + ret = ops->set_param(info->ph, &scalar_msg, MEMLAT_ALGO_STR, MEMLAT_SET_MAX_FREQ,
>> + sizeof(scalar_msg));
>> + if (ret < 0)
>> + pr_err("Failed to set max_freq for %s\n", monitor->mon_name);
>> +
>> + return ret;
>> +}
>> +
>> +static int cpucp_memlat_init(struct scmi_device *sdev)
>> +{
>> + const struct scmi_handle *handle = sdev->handle;
>> + const struct qcom_scmi_vendor_ops *ops;
>> + struct scmi_protocol_handle *ph;
>> + struct scmi_memlat_info *info;
>> + u32 cpucp_sample_ms = 8;
>> + int ret, i, j;
>> +
>> + if (!handle)
>> + return -ENODEV;
>> +
>> + ops = handle->devm_protocol_get(sdev, QCOM_SCMI_VENDOR_PROTOCOL, &ph);
>> + if (IS_ERR(ops))
>> + return PTR_ERR(ops);
>> +
>> + info = devm_kzalloc(&sdev->dev, sizeof(*info), GFP_KERNEL);
>> + if (!info)
>> + return -ENOMEM;
>> +
>> + ret = process_scmi_memlat_of_node(sdev, info);
>> + if (ret)
>> + pr_err("Failed to configure common events: %d\n", ret);
>> +
>> + info->ph = ph;
>> + info->ops = ops;
>> +
>> + ret = configure_cpucp_common_events(info);
>> + if (ret < 0)
>> + pr_err("Failed to configure common events: %d\n", ret);
>> +
>> + for (i = 0; i < info->memory_cnt; i++) {
>> + ret = configure_cpucp_grp(info, i);
>> + if (ret < 0)
>> + pr_err("Failed to configure mem group: %d\n", ret);
>> +
>> + for (j = 0; j < info->memory[i]->monitor_cnt; j++) {
>> + /* Configure per monitor parameters */
>> + ret = configure_cpucp_mon(info, i, j);
>> + if (ret < 0)
>> + pr_err("Failed to configure monitor: %d\n", ret);
>> + }
>> + }
>> +
>> + ret = ops->set_param(ph, &cpucp_sample_ms, MEMLAT_ALGO_STR, MEMLAT_SAMPLE_MS,
>> + sizeof(cpucp_sample_ms));
>> + if (ret < 0)
>> + pr_err("Failed to set cpucp sample_ms ret = %d\n", ret);
>> +
>> + /* Start sampling and voting timer */
>> + ret = ops->start_activity(ph, NULL, MEMLAT_ALGO_STR, MEMLAT_START_TIMER, 0);
>> + if (ret < 0)
>> + pr_err("Error in starting the mem group timer %d\n", ret);
>> +
>> + dev_set_drvdata(&sdev->dev, info);
>> +
>> + return ret;
>> +}
>> +
>> +static int scmi_client_probe(struct scmi_device *sdev)
>> +{
>> + cpucp_memlat_init(sdev);
>> +
>> + return 0;
>> +}
>> +
>> +static const struct scmi_device_id scmi_id_table[] = {
>> + { .protocol_id = QCOM_SCMI_VENDOR_PROTOCOL, .name = "qcom_scmi_vendor_protocol" },
>> + { },
>> +};
>> +MODULE_DEVICE_TABLE(scmi, scmi_id_table);
>> +
>> +static struct scmi_driver qcom_scmi_client_drv = {
>> + .name = "qcom-scmi-driver",
>> + .probe = scmi_client_probe,
>> + .id_table = scmi_id_table,
>> +};
>> +module_scmi_driver(qcom_scmi_client_drv);
>> +
>> +MODULE_DESCRIPTION("QTI SCMI client driver");
>> +MODULE_LICENSE("GPL");
>> --
>> 2.34.1
>>
>>
>
>
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