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Date: Tue, 7 Mar 2023 18:47:51 +0530
From: Sricharan Ramabadhran <quic_srichara@...cinc.com>
To: Manikanta Mylavarapu <quic_mmanikan@...cinc.com>,
<agross@...nel.org>, <andersson@...nel.org>,
<konrad.dybcio@...aro.org>, <robh+dt@...nel.org>,
<krzysztof.kozlowski+dt@...aro.org>, <jassisinghbrar@...il.com>,
<mathieu.poirier@...aro.org>, <mturquette@...libre.com>,
<sboyd@...nel.org>, <quic_gurus@...cinc.com>,
<loic.poulain@...aro.org>, <quic_eberman@...cinc.com>,
<robimarko@...il.com>, <linux-arm-msm@...r.kernel.org>,
<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<linux-remoteproc@...r.kernel.org>, <linux-clk@...r.kernel.org>
CC: <quic_gokulsri@...cinc.com>, <quic_sjaganat@...cinc.com>,
<quic_kathirav@...cinc.com>, <quic_arajkuma@...cinc.com>,
<quic_anusha@...cinc.com>, <quic_poovendh@...cinc.com>
Subject: Re: [PATCH 08/11] remoteproc: qcom: Add Hexagon based multipd rproc
driver
On 3/7/2023 10:11 AM, Manikanta Mylavarapu wrote:
> APSS brings Q6 out of reset and then Q6 brings
> WCSS block (wifi radio's) out of reset.
>
> ---------------
> --> |WiFi 2G radio|
> | --------------
> |
> -------- ------- |
> | APSS | ---> |QDSP6| -----|
> --------- ------- |
> |
> |
> | --------------
> --> |WiFi 5G radio|
> --------------
>
> Problem here is if any radio crashes, subsequently other
> radio also should crash because Q6 crashed. Let's say
> 2G radio crashed, Q6 should pass this info to APSS. Only
> Q6 processor interrupts registered with APSS. Obviously
> Q6 should crash and raise fatal interrupt to APSS. Due
> to this 5G radio also crashed. But no issue in 5G radio,
> because of 2G radio crash 5G radio also impacted.
>
> In multi pd model, this problem is resolved. Here WCSS
> functionality (WiFi radio's) moved out from Q6 root pd
> to a separate user pd. Due to this, radio's independently
> pass their status info to APPS with out crashing Q6. So
> other radio's won't be impacted.
>
> ---------
> |WiFi |
> --> |2G radio|
> | ---------
> ------ Start Q6 ------- |
> | | ------------------> | | |
> | | Start WCSS PD1 (2G) | | |
> |APSS| ----------------------->|QDSP6|-----|
> | | Start WCSS PD1 (5G) | |
> | | ----------------------->| |-----|
> ------ ------- |
> |
> | -----------
> |-->|WiFi |
> |5G radio |
> -----------
> According to linux terminology, here consider Q6 as root
> i.e it provide all services, WCSS (wifi radio's) as user
> i.e it uses services provided by root.
>
> Since Q6 root & WCSS user pd's able to communicate with
> APSS individually, multipd remoteproc driver registers
> each PD with rproc framework. Here clients (Wifi host drivers)
> intrested on WCSS PD rproc, so multipd driver start's root
> pd in the context of WCSS user pd rproc start. Similarly
> on down path, root pd will be stopped after wcss user pd
> stopped.
>
> Here WCSS(user) PD is dependent on Q6(root) PD, so first
> q6 pd should be up before wcss pd. After wcss pd goes down,
> q6 pd should be turned off.
>
> rproc->ops->start(userpd_rproc) {
> /* Boot root pd rproc */
> rproc_boot(upd_dev->parent);
> ---
> /* user pd rproc start sequence */
> ---
> ---
> }
> With this way we ensure that root pd brought up before userpd.
>
> rproc->ops->stop(userpd_rproc) {
> ---
> ---
> /* user pd rproc stop sequence */
> ---
> ---
> /* Shutdown root pd rproc */
> rproc_shutdown(upd_dev->parent);
> }
> After userpd rproc stops, root pd rproc will be stopped.
> IPQ5018, IPQ9574 supports multipd remoteproc driver.
>
> Signed-off-by: Manikanta Mylavarapu <quic_mmanikan@...cinc.com>
> ---
> drivers/firmware/qcom_scm.c | 114 +++++
> drivers/firmware/qcom_scm.h | 6 +
> drivers/remoteproc/Kconfig | 20 +
> drivers/remoteproc/Makefile | 1 +
> drivers/remoteproc/qcom_common.c | 23 +
> drivers/remoteproc/qcom_common.h | 1 +
> drivers/remoteproc/qcom_q6v5.c | 41 +-
> drivers/remoteproc/qcom_q6v5.h | 15 +-
> drivers/remoteproc/qcom_q6v5_adsp.c | 5 +-
> drivers/remoteproc/qcom_q6v5_mpd.c | 668 +++++++++++++++++++++++++
> drivers/remoteproc/qcom_q6v5_mss.c | 4 +-
> drivers/remoteproc/qcom_q6v5_pas.c | 3 +-
> drivers/soc/qcom/mdt_loader.c | 314 ++++++++++++
> include/linux/firmware/qcom/qcom_scm.h | 3 +
> include/linux/soc/qcom/mdt_loader.h | 19 +
> 15 files changed, 1228 insertions(+), 9 deletions(-)
> create mode 100644 drivers/remoteproc/qcom_q6v5_mpd.c
>
> diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c
> index d88c5f14bd54..d69560963353 100644
> --- a/drivers/firmware/qcom_scm.c
> +++ b/drivers/firmware/qcom_scm.c
> @@ -654,6 +654,120 @@ int qcom_scm_pas_shutdown(u32 peripheral)
> }
> EXPORT_SYMBOL(qcom_scm_pas_shutdown);
>
> +/**
> + * qti_scm_int_radio_powerup - Bring up internal radio userpd
> + *
> + * @peripheral: peripheral id
> + *
> + * Return 0 on success.
> + */
> +int qti_scm_int_radio_powerup(u32 peripheral)
> +{
qcom instead and in other places too.
> + int ret;
> + struct qcom_scm_desc desc = {
> + .svc = QCOM_SCM_PD_LOAD_SVC_ID,
> + .cmd = QCOM_SCM_INT_RAD_PWR_UP_CMD_ID,
> + .arginfo = QCOM_SCM_ARGS(1),
> + .args[0] = peripheral,
> + .owner = ARM_SMCCC_OWNER_SIP,
> + };
> + struct qcom_scm_res res;
> +
> + ret = qcom_scm_clk_enable();
> + if (ret)
> + return ret;
> +
> + ret = qcom_scm_bw_enable();
> + if (ret)
> + return ret;
> +
> + ret = qcom_scm_call(__scm->dev, &desc, &res);
> + qcom_scm_bw_disable();
> + qcom_scm_clk_disable();
> +
> + return ret ? : res.result[0];
> +}
> +EXPORT_SYMBOL(qti_scm_int_radio_powerup);
> +
> +/**
> + * qti_scm_int_radio_powerdown() - Shut down internal radio userpd
> + *
> + * @peripheral: peripheral id
> + *
> + * Returns 0 on success.
> + */
> +int qti_scm_int_radio_powerdown(u32 peripheral)
> +{
> + int ret;
> + struct qcom_scm_desc desc = {
> + .svc = QCOM_SCM_PD_LOAD_SVC_ID,
> + .cmd = QCOM_SCM_INT_RAD_PWR_DN_CMD_ID,
> + .arginfo = QCOM_SCM_ARGS(1),
> + .args[0] = peripheral,
> + .owner = ARM_SMCCC_OWNER_SIP,
> + };
> + struct qcom_scm_res res;
> +
> + ret = qcom_scm_clk_enable();
> + if (ret)
> + return ret;
> +
> + ret = qcom_scm_bw_enable();
> + if (ret)
> + return ret;
> +
> + ret = qcom_scm_call(__scm->dev, &desc, &res);
> + qcom_scm_bw_disable();
> + qcom_scm_clk_disable();
> +
> + return ret ? : res.result[0];
> +}
> +EXPORT_SYMBOL(qti_scm_int_radio_powerdown);
> +
> +/**
> + * qti_scm_pdseg_memcpy_v2() - copy userpd PIL segments data to dma blocks
> + *
> + * @peripheral: peripheral id
> + * @phno: program header no
> + * @dma: handle of dma region
> + * @seg_cnt: no of dma blocks
> + *
> + * Returns 0 if trustzone successfully loads userpd PIL segments from dma
> + * blocks to DDR
> + */
> +int qti_scm_pdseg_memcpy_v2(u32 peripheral, int phno, dma_addr_t dma,
> + int seg_cnt)
> +{
> + int ret;
> + struct qcom_scm_desc desc = {
> + .svc = QCOM_SCM_PD_LOAD_SVC_ID,
> + .cmd = QCOM_SCM_PD_LOAD_V2_CMD_ID,
> + .arginfo = QCOM_SCM_ARGS(4, QCOM_SCM_VAL, QCOM_SCM_VAL,
> + QCOM_SCM_RW, QCOM_SCM_VAL),
> + .args[0] = peripheral,
> + .args[1] = phno,
> + .args[2] = dma,
> + .args[3] = seg_cnt,
> + .owner = ARM_SMCCC_OWNER_SIP,
> + };
> + struct qcom_scm_res res;
> +
> + ret = qcom_scm_clk_enable();
> + if (ret)
> + return ret;
> +
> + ret = qcom_scm_bw_enable();
> + if (ret)
> + return ret;
> +
> + ret = qcom_scm_call(__scm->dev, &desc, &res);
> + qcom_scm_bw_disable();
> + qcom_scm_clk_disable();
> +
> + return ret ? : res.result[0];
> +}
> +EXPORT_SYMBOL(qti_scm_pdseg_memcpy_v2);
> +
This patch should be split further.
btw, this new scm apis should go in as one patch first separately.
> /**
> * qcom_scm_pas_supported() - Check if the peripheral authentication service is
> * available for the given peripherial
> diff --git a/drivers/firmware/qcom_scm.h b/drivers/firmware/qcom_scm.h
> index e6e512bd57d1..99e3ab2f1986 100644
> --- a/drivers/firmware/qcom_scm.h
> +++ b/drivers/firmware/qcom_scm.h
> @@ -132,6 +132,12 @@ extern int scm_legacy_call(struct device *dev, const struct qcom_scm_desc *desc,
> #define QCOM_SCM_SMMU_CONFIG_ERRATA1 0x03
> #define QCOM_SCM_SMMU_CONFIG_ERRATA1_CLIENT_ALL 0x02
>
> +#define QCOM_SCM_PD_LOAD_SVC_ID 0x2
> +#define QCOM_SCM_PD_LOAD_CMD_ID 0x16
> +#define QCOM_SCM_PD_LOAD_V2_CMD_ID 0x19
> +#define QCOM_SCM_INT_RAD_PWR_UP_CMD_ID 0x17
> +#define QCOM_SCM_INT_RAD_PWR_DN_CMD_ID 0x18
> +
> #define QCOM_SCM_SVC_WAITQ 0x24
> #define QCOM_SCM_WAITQ_RESUME 0x02
> #define QCOM_SCM_WAITQ_GET_WQ_CTX 0x03
> diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
> index a850e9f486dd..44af5c36f67e 100644
> --- a/drivers/remoteproc/Kconfig
> +++ b/drivers/remoteproc/Kconfig
> @@ -234,6 +234,26 @@ config QCOM_Q6V5_PAS
> CDSP (Compute DSP), MPSS (Modem Peripheral SubSystem), and
> SLPI (Sensor Low Power Island).
>
> +config QCOM_Q6V5_MPD
> + tristate "Qualcomm Hexagon based MPD model Peripheral Image Loader"
> + depends on OF && ARCH_QCOM
> + depends on QCOM_SMEM
> + depends on RPMSG_QCOM_SMD || RPMSG_QCOM_SMD=n
> + depends on RPMSG_QCOM_GLINK_SMEM || RPMSG_QCOM_GLINK_SMEM=n
> + depends on QCOM_SYSMON || QCOM_SYSMON=n
> + depends on RPMSG_QCOM_GLINK || RPMSG_QCOM_GLINK=n
> + depends on QCOM_AOSS_QMP || QCOM_AOSS_QMP=n
> + select MFD_SYSCON
> + select QCOM_MDT_LOADER
> + select QCOM_PIL_INFO
> + select QCOM_Q6V5_COMMON
> + select QCOM_RPROC_COMMON
> + select QCOM_SCM
> + help
> + Say y here to support the Qualcomm Secure Peripheral Image Loader
> + for the Hexagon based MultiPD model remote processors on e.g. IPQ5018.
> + This is trustZone wireless subsystem.
> +
> config QCOM_Q6V5_WCSS
> tristate "Qualcomm Hexagon based WCSS Peripheral Image Loader"
> depends on OF && ARCH_QCOM
> diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile
> index 91314a9b43ce..b64051080ec1 100644
> --- a/drivers/remoteproc/Makefile
> +++ b/drivers/remoteproc/Makefile
> @@ -25,6 +25,7 @@ obj-$(CONFIG_QCOM_PIL_INFO) += qcom_pil_info.o
> obj-$(CONFIG_QCOM_RPROC_COMMON) += qcom_common.o
> obj-$(CONFIG_QCOM_Q6V5_COMMON) += qcom_q6v5.o
> obj-$(CONFIG_QCOM_Q6V5_ADSP) += qcom_q6v5_adsp.o
> +obj-$(CONFIG_QCOM_Q6V5_MPD) += qcom_q6v5_mpd.o
> obj-$(CONFIG_QCOM_Q6V5_MSS) += qcom_q6v5_mss.o
> obj-$(CONFIG_QCOM_Q6V5_PAS) += qcom_q6v5_pas.o
> obj-$(CONFIG_QCOM_Q6V5_WCSS) += qcom_q6v5_wcss.o
> diff --git a/drivers/remoteproc/qcom_common.c b/drivers/remoteproc/qcom_common.c
> index a0d4238492e9..b72fbda02242 100644
> --- a/drivers/remoteproc/qcom_common.c
> +++ b/drivers/remoteproc/qcom_common.c
> @@ -510,5 +510,28 @@ void qcom_remove_ssr_subdev(struct rproc *rproc, struct qcom_rproc_ssr *ssr)
> }
> EXPORT_SYMBOL_GPL(qcom_remove_ssr_subdev);
>
> +/**
> + * qcom_get_pd_asid() - get the pd asid number from DT node
> + * @node: device tree node
> + *
> + * Returns asid if node name has 'pd' string
> + */
> +s8 qcom_get_pd_asid(struct device_node *node)
> +{
> + char *str;
> + u8 pd_asid;
> +
> + if (!node)
> + return -EINVAL;
> +
> + str = strstr(node->name, "pd");
> + if (!str)
> + return 0;
> +
> + str += strlen("pd");
> + return kstrtos8(str, 10, &pd_asid) ? -EINVAL : pd_asid;
> +}
> +EXPORT_SYMBOL(qcom_get_pd_asid);
> +
> MODULE_DESCRIPTION("Qualcomm Remoteproc helper driver");
> MODULE_LICENSE("GPL v2");
> diff --git a/drivers/remoteproc/qcom_common.h b/drivers/remoteproc/qcom_common.h
> index 9ef4449052a9..9f3fb11224aa 100644
> --- a/drivers/remoteproc/qcom_common.h
> +++ b/drivers/remoteproc/qcom_common.h
> @@ -75,5 +75,6 @@ static inline bool qcom_sysmon_shutdown_acked(struct qcom_sysmon *sysmon)
> return false;
> }
> #endif
> +s8 qcom_get_pd_asid(struct device_node *node);
>
> #endif
> diff --git a/drivers/remoteproc/qcom_q6v5.c b/drivers/remoteproc/qcom_q6v5.c
> index 192c7aa0e39e..b88bf3a8e53b 100644
> --- a/drivers/remoteproc/qcom_q6v5.c
> +++ b/drivers/remoteproc/qcom_q6v5.c
> @@ -118,7 +118,7 @@ static irqreturn_t q6v5_wdog_interrupt(int irq, void *data)
> return IRQ_HANDLED;
> }
>
> -static irqreturn_t q6v5_fatal_interrupt(int irq, void *data)
> +irqreturn_t q6v5_fatal_interrupt(int irq, void *data)
> {
> struct qcom_q6v5 *q6v5 = data;
> size_t len;
> @@ -139,7 +139,7 @@ static irqreturn_t q6v5_fatal_interrupt(int irq, void *data)
> return IRQ_HANDLED;
> }
>
> -static irqreturn_t q6v5_ready_interrupt(int irq, void *data)
> +irqreturn_t q6v5_ready_interrupt(int irq, void *data)
> {
> struct qcom_q6v5 *q6v5 = data;
>
> @@ -183,7 +183,16 @@ static irqreturn_t q6v5_handover_interrupt(int irq, void *data)
> return IRQ_HANDLED;
> }
>
> -static irqreturn_t q6v5_stop_interrupt(int irq, void *data)
> +irqreturn_t q6v5_spawn_interrupt(int irq, void *data)
> +{
> + struct qcom_q6v5 *q6v5 = data;
> +
> + complete(&q6v5->spawn_done);
> +
> + return IRQ_HANDLED;
> +}
> +
> +irqreturn_t q6v5_stop_interrupt(int irq, void *data)
> {
> struct qcom_q6v5 *q6v5 = data;
>
> @@ -220,6 +229,28 @@ int qcom_q6v5_request_stop(struct qcom_q6v5 *q6v5, struct qcom_sysmon *sysmon)
> }
> EXPORT_SYMBOL_GPL(qcom_q6v5_request_stop);
>
> +/**
> + * qcom_q6v5_request_spawn() - request the remote processor to spawn
> + * @q6v5: reference to qcom_q6v5 context
> + *
> + * Return: 0 on success, negative errno on failure
> + */
> +int qcom_q6v5_request_spawn(struct qcom_q6v5 *q6v5)
> +{
> + int ret;
> +
> + ret = qcom_smem_state_update_bits(q6v5->spawn_state,
> + BIT(q6v5->spawn_bit), BIT(q6v5->spawn_bit));
> +
> + ret = wait_for_completion_timeout(&q6v5->spawn_done, 5 * HZ);
> +
> + qcom_smem_state_update_bits(q6v5->spawn_state,
> + BIT(q6v5->spawn_bit), 0);
> +
> + return ret == 0 ? -ETIMEDOUT : 0;
> +}
> +EXPORT_SYMBOL_GPL(qcom_q6v5_request_spawn);
> +
> /**
> * qcom_q6v5_panic() - panic handler to invoke a stop on the remote
> * @q6v5: reference to qcom_q6v5 context
> @@ -250,7 +281,8 @@ EXPORT_SYMBOL_GPL(qcom_q6v5_panic);
> * Return: 0 on success, negative errno on failure
> */
> int qcom_q6v5_init(struct qcom_q6v5 *q6v5, struct platform_device *pdev,
> - struct rproc *rproc, int crash_reason, const char *load_state,
> + struct rproc *rproc, int remote_id, int crash_reason,
> + const char *load_state,
> void (*handover)(struct qcom_q6v5 *q6v5))
> {
> int ret;
> @@ -258,6 +290,7 @@ int qcom_q6v5_init(struct qcom_q6v5 *q6v5, struct platform_device *pdev,
> q6v5->rproc = rproc;
> q6v5->dev = &pdev->dev;
> q6v5->crash_reason = crash_reason;
> + q6v5->remote_id = remote_id;
> q6v5->handover = handover;
>
> init_completion(&q6v5->start_done);
> diff --git a/drivers/remoteproc/qcom_q6v5.h b/drivers/remoteproc/qcom_q6v5.h
> index 5a859c41896e..d00568339d46 100644
> --- a/drivers/remoteproc/qcom_q6v5.h
> +++ b/drivers/remoteproc/qcom_q6v5.h
> @@ -18,22 +18,29 @@ struct qcom_q6v5 {
>
> struct qcom_smem_state *state;
> struct qmp *qmp;
> + struct qcom_smem_state *shutdown_state;
> + struct qcom_smem_state *spawn_state;
>
> struct icc_path *path;
>
> unsigned stop_bit;
> + unsigned shutdown_bit;
> + unsigned spawn_bit;
>
> int wdog_irq;
> int fatal_irq;
> int ready_irq;
> int handover_irq;
> int stop_irq;
> + int spawn_irq;
>
> bool handover_issued;
>
> struct completion start_done;
> struct completion stop_done;
> + struct completion spawn_done;
>
> + int remote_id;
> int crash_reason;
>
> bool running;
> @@ -43,14 +50,20 @@ struct qcom_q6v5 {
> };
>
> int qcom_q6v5_init(struct qcom_q6v5 *q6v5, struct platform_device *pdev,
> - struct rproc *rproc, int crash_reason, const char *load_state,
> + struct rproc *rproc, int remote_id, int crash_reason,
> + const char *load_state,
> void (*handover)(struct qcom_q6v5 *q6v5));
> void qcom_q6v5_deinit(struct qcom_q6v5 *q6v5);
>
> int qcom_q6v5_prepare(struct qcom_q6v5 *q6v5);
> int qcom_q6v5_unprepare(struct qcom_q6v5 *q6v5);
> int qcom_q6v5_request_stop(struct qcom_q6v5 *q6v5, struct qcom_sysmon *sysmon);
> +int qcom_q6v5_request_spawn(struct qcom_q6v5 *q6v5);
> int qcom_q6v5_wait_for_start(struct qcom_q6v5 *q6v5, int timeout);
> unsigned long qcom_q6v5_panic(struct qcom_q6v5 *q6v5);
> +irqreturn_t q6v5_fatal_interrupt(int irq, void *data);
> +irqreturn_t q6v5_ready_interrupt(int irq, void *data);
> +irqreturn_t q6v5_spawn_interrupt(int irq, void *data);
> +irqreturn_t q6v5_stop_interrupt(int irq, void *data);
Even this also you can keep it as a separate preparatory patch to pull
out the common functions.
>
> #endif
> diff --git a/drivers/remoteproc/qcom_q6v5_adsp.c b/drivers/remoteproc/qcom_q6v5_adsp.c
> index 08d8dad22ca7..bf8909ad5ff5 100644
> --- a/drivers/remoteproc/qcom_q6v5_adsp.c
> +++ b/drivers/remoteproc/qcom_q6v5_adsp.c
> @@ -733,8 +733,9 @@ static int adsp_probe(struct platform_device *pdev)
> if (ret)
> goto disable_pm;
>
> - ret = qcom_q6v5_init(&adsp->q6v5, pdev, rproc, desc->crash_reason_smem,
> - desc->load_state, qcom_adsp_pil_handover);
> + ret = qcom_q6v5_init(&adsp->q6v5, pdev, rproc, QCOM_SMEM_HOST_ANY,
> + desc->crash_reason_smem, desc->load_state,
> + qcom_adsp_pil_handover);
> if (ret)
> goto disable_pm;
>
> diff --git a/drivers/remoteproc/qcom_q6v5_mpd.c b/drivers/remoteproc/qcom_q6v5_mpd.c
> new file mode 100644
> index 000000000000..853aa3bc5859
> --- /dev/null
> +++ b/drivers/remoteproc/qcom_q6v5_mpd.c
> @@ -0,0 +1,668 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (C) 2016-2018 Linaro Ltd.
> + * Copyright (C) 2014 Sony Mobile Communications AB
> + * Copyright (c) 2012-2018, 2021 The Linux Foundation. All rights reserved.
> + */
> +#include <linux/clk.h>
> +#include <linux/delay.h>
> +#include <linux/io.h>
> +#include <linux/iopoll.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/of_address.h>
> +#include <linux/of_device.h>
> +#include <linux/of_reserved_mem.h>
> +#include <linux/platform_device.h>
> +#include <linux/reset.h>
> +#include <linux/soc/qcom/mdt_loader.h>
> +#include <linux/soc/qcom/smem.h>
> +#include <linux/soc/qcom/smem_state.h>
> +#include <linux/firmware/qcom/qcom_scm.h>
> +#include <linux/interrupt.h>
Alphabetical order.
Regards,
Sricharan
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