Re: [PATCH 1/5] interconnect: qcom: sdm660: Commonize RPM-QoS
From: Yassine Oudjana <y.oudjana@protonmail.com>
Date: 2021-07-31 11:22:55
Also in:
linux-arm-msm, linux-devicetree, lkml
On Fri, Jul 30 2021 at 17:39:31 +0400, AngeloGioacchino Del Regno [off-list ref] wrote:
Il 30/07/21 14:06, Yassine Oudjana ha scritto:quoted
SoCs such as MSM8996 also control bus QoS in a similar fashion to SDM660, with some paths being controlled by RPM and others directly by the AP. Move relevant functions and defines to a new object so that they can be used in multiple drivers. Signed-off-by: Yassine Oudjana [off-list ref]Hello Yassine, thanks for the patch! However, I think there are a few things to improve:quoted
--- drivers/interconnect/qcom/Kconfig | 5 +- drivers/interconnect/qcom/Makefile | 2 + drivers/interconnect/qcom/icc-rpm-qos.c | 237 ++++++++++++++++ drivers/interconnect/qcom/icc-rpm-qos.h | 133 +++++++++ drivers/interconnect/qcom/icc-rpmh.c | 6 +- drivers/interconnect/qcom/icc-rpmh.h | 2 +- drivers/interconnect/qcom/sc7180.c | 2 +- drivers/interconnect/qcom/sc7280.c | 2 +- drivers/interconnect/qcom/sdm660.c | 346 +----------------------- drivers/interconnect/qcom/sdm845.c | 2 +- drivers/interconnect/qcom/sdx55.c | 2 +- drivers/interconnect/qcom/sm8150.c | 2 +- drivers/interconnect/qcom/sm8250.c | 2 +- drivers/interconnect/qcom/sm8350.c | 2 +- 14 files changed, 391 insertions(+), 354 deletions(-) create mode 100644 drivers/interconnect/qcom/icc-rpm-qos.c create mode 100644 drivers/interconnect/qcom/icc-rpm-qos.h diff --git a/drivers/interconnect/qcom/Kconfig b/drivers/interconnect/qcom/Kconfig index 0d7a2500d0b8..ad16224f1720 100644 --- a/drivers/interconnect/qcom/Kconfig +++ b/drivers/interconnect/qcom/Kconfig @@ -87,7 +87,7 @@ config INTERCONNECT_QCOM_SDM660 tristate "Qualcomm SDM660 interconnect driver" depends on INTERCONNECT_QCOM depends on QCOM_SMD_RPM - select INTERCONNECT_QCOM_SMD_RPM + select INTERCONNECT_QCOM_SMD_RPM_QOS help This is a driver for the Qualcomm Network-on-Chip on sdm660-based platforms. @@ -139,3 +139,6 @@ config INTERCONNECT_QCOM_SM8350 config INTERCONNECT_QCOM_SMD_RPM tristate + +config INTERCONNECT_QCOM_SMD_RPM_QOS + tristate diff --git a/drivers/interconnect/qcom/Makefile b/drivers/interconnect/qcom/Makefile index 2880129a6fe4..2d04d024f46e 100644 --- a/drivers/interconnect/qcom/Makefile +++ b/drivers/interconnect/qcom/Makefile @@ -16,6 +16,7 @@ qnoc-sm8150-objs := sm8150.o qnoc-sm8250-objs := sm8250.o qnoc-sm8350-objs := sm8350.o icc-smd-rpm-objs := smd-rpm.o icc-rpm.o +icc-smd-rpm-qos-objs := smd-rpm.o icc-rpm-qos.o obj-$(CONFIG_INTERCONNECT_QCOM_BCM_VOTER) += icc-bcm-voter.o obj-$(CONFIG_INTERCONNECT_QCOM_MSM8916) += qnoc-msm8916.o @@ -33,3 +34,4 @@ obj-$(CONFIG_INTERCONNECT_QCOM_SM8150) += qnoc-sm8150.o obj-$(CONFIG_INTERCONNECT_QCOM_SM8250) += qnoc-sm8250.o obj-$(CONFIG_INTERCONNECT_QCOM_SM8350) += qnoc-sm8350.o obj-$(CONFIG_INTERCONNECT_QCOM_SMD_RPM) += icc-smd-rpm.o +obj-$(CONFIG_INTERCONNECT_QCOM_SMD_RPM_QOS) += icc-smd-rpm-qos.o diff --git a/drivers/interconnect/qcom/icc-rpm-qos.c b/drivers/interconnect/qcom/icc-rpm-qos.c new file mode 100644 index 000000000000..678b347375d8 --- /dev/null +++ b/drivers/interconnect/qcom/icc-rpm-qos.c @@ -0,0 +1,237 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2020, AngeloGioacchino Del Regno [off-list ref] + */ + +#include <linux/clk.h> +#include <linux/device.h> +#include <linux/interconnect-provider.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/of_platform.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/slab.h> + +#include "smd-rpm.h" +#include "icc-rpm-qos.h" + +static int qcom_icc_bimc_set_qos_health(struct regmap *rmap, + struct qcom_icc_qos *qos, + int regnum) +{ + u32 val; + u32 mask; + + val = qos->prio_level; + mask = M_BKE_HEALTH_CFG_PRIOLVL_MASK; + + val |= qos->areq_prio << M_BKE_HEALTH_CFG_AREQPRIO_SHIFT; + mask |= M_BKE_HEALTH_CFG_AREQPRIO_MASK; + + /* LIMITCMDS is not present on M_BKE_HEALTH_3 */ + if (regnum != 3) { + val |= qos->limit_commands << M_BKE_HEALTH_CFG_LIMITCMDS_SHIFT; + mask |= M_BKE_HEALTH_CFG_LIMITCMDS_MASK; + } + + return regmap_update_bits(rmap, + M_BKE_HEALTH_CFG_ADDR(regnum, qos->qos_port), + mask, val); +} + +static int qcom_icc_set_bimc_qos(struct icc_node *src, u64 max_bw, + bool bypass_mode) +{ + struct qcom_icc_provider *qp; + struct qcom_icc_node *qn; + struct icc_provider *provider; + u32 mode = NOC_QOS_MODE_BYPASS; + u32 val = 0; + int i, rc = 0; + + qn = src->data; + provider = src->provider; + qp = to_qcom_provider(provider); + + if (qn->qos.qos_mode != -1) + mode = qn->qos.qos_mode; + + /* QoS Priority: The QoS Health parameters are getting considered + * only if we are NOT in Bypass Mode. + */ + if (mode != NOC_QOS_MODE_BYPASS) { + for (i = 3; i >= 0; i--) { + rc = qcom_icc_bimc_set_qos_health(qp->regmap, + &qn->qos, i); + if (rc) + return rc; + } + + /* Set BKE_EN to 1 when Fixed, Regulator or Limiter Mode */ + val = 1; + } + + return regmap_update_bits(qp->regmap, M_BKE_EN_ADDR(qn->qos.qos_port), + M_BKE_EN_EN_BMASK, val); +} + +static int qcom_icc_noc_set_qos_priority(struct regmap *rmap, + struct qcom_icc_qos *qos) +{ + u32 val; + int rc; + + /* Must be updated one at a time, P1 first, P0 last */ + val = qos->areq_prio << NOC_QOS_PRIORITY_P1_SHIFT; + rc = regmap_update_bits(rmap, NOC_QOS_PRIORITYn_ADDR(qos->qos_port), + NOC_QOS_PRIORITY_MASK, val); + if (rc) + return rc; + + val = qos->prio_level << NOC_QOS_PRIORITY_P0_SHIFT; + return regmap_update_bits(rmap, NOC_QOS_PRIORITYn_ADDR(qos->qos_port), + NOC_QOS_PRIORITY_MASK, val); +} + +static int qcom_icc_set_noc_qos(struct icc_node *src, u64 max_bw) +{ + struct qcom_icc_provider *qp; + struct qcom_icc_node *qn; + struct icc_provider *provider; + u32 mode = NOC_QOS_MODE_BYPASS; + int rc = 0; + + qn = src->data; + provider = src->provider; + qp = to_qcom_provider(provider); + + if (qn->qos.qos_port < 0) { + dev_dbg(src->provider->dev, + "NoC QoS: Skipping %s: vote aggregated on parent.\n", + qn->name); + return 0; + } + + if (qn->qos.qos_mode != -1) + mode = qn->qos.qos_mode; + + if (mode == NOC_QOS_MODE_FIXED) { + dev_dbg(src->provider->dev, "NoC QoS: %s: Set Fixed mode\n", + qn->name); + rc = qcom_icc_noc_set_qos_priority(qp->regmap, &qn->qos); + if (rc) + return rc; + } else if (mode == NOC_QOS_MODE_BYPASS) { + dev_dbg(src->provider->dev, "NoC QoS: %s: Set Bypass mode\n", + qn->name); + } + + return regmap_update_bits(qp->regmap, + NOC_QOS_MODEn_ADDR(qn->qos.qos_port), + NOC_QOS_MODEn_MASK, mode); +} + +static int qcom_icc_qos_set(struct icc_node *node, u64 sum_bw) +{ + struct qcom_icc_provider *qp = to_qcom_provider(node->provider); + struct qcom_icc_node *qn = node->data; + + dev_dbg(node->provider->dev, "Setting QoS for %s\n", qn->name); + + if (qp->is_bimc_node) + return qcom_icc_set_bimc_qos(node, sum_bw, + (qn->qos.qos_mode == NOC_QOS_MODE_BYPASS)); + + return qcom_icc_set_noc_qos(node, sum_bw); +} + +static int qcom_icc_rpm_set(int mas_rpm_id, int slv_rpm_id, u64 sum_bw) +{ + int ret = 0; + + if (mas_rpm_id != -1) { + ret = qcom_icc_rpm_smd_send(QCOM_SMD_RPM_ACTIVE_STATE, + RPM_BUS_MASTER_REQ, + mas_rpm_id, + sum_bw); + if (ret) { + pr_err("qcom_icc_rpm_smd_send mas %d error %d\n", + mas_rpm_id, ret); + return ret; + } + } + + if (slv_rpm_id != -1) { + ret = qcom_icc_rpm_smd_send(QCOM_SMD_RPM_ACTIVE_STATE, + RPM_BUS_SLAVE_REQ, + slv_rpm_id, + sum_bw); + if (ret) { + pr_err("qcom_icc_rpm_smd_send slv %d error %d\n", + slv_rpm_id, ret); + return ret; + } + } + + return ret; +} + +int qcom_icc_rpm_qos_set(struct icc_node *src, struct icc_node *dst) +{ + struct qcom_icc_provider *qp; + struct qcom_icc_node *qn; + struct icc_provider *provider; + struct icc_node *n; + u64 sum_bw; + u64 max_peak_bw; + u64 rate; + u32 agg_avg = 0; + u32 agg_peak = 0; + int ret, i; + + qn = src->data; + provider = src->provider; + qp = to_qcom_provider(provider); + + list_for_each_entry(n, &provider->nodes, node_list) + provider->aggregate(n, 0, n->avg_bw, n->peak_bw, + &agg_avg, &agg_peak); + + sum_bw = icc_units_to_bps(agg_avg); + max_peak_bw = icc_units_to_bps(agg_peak); + + if (!qn->qos.ap_owned) { + /* send bandwidth request message to the RPM processor */ + ret = qcom_icc_rpm_set(qn->mas_rpm_id, qn->slv_rpm_id, sum_bw); + if (ret) + return ret; + } else if (qn->qos.qos_mode != -1) { + /* set bandwidth directly from the AP */ + ret = qcom_icc_qos_set(src, sum_bw); + if (ret) + return ret; + } + + rate = max(sum_bw, max_peak_bw); + + do_div(rate, qn->buswidth); + + if (qn->rate == rate) + return 0; + + for (i = 0; i < qp->num_clks; i++) { + ret = clk_set_rate(qp->bus_clks[i].clk, rate); + if (ret) { + pr_err("%s clk_set_rate error: %d\n", + qp->bus_clks[i].id, ret); + return ret; + } + } + + qn->rate = rate; + + return 0; +} +EXPORT_SYMBOL_GPL(qcom_icc_rpm_qos_set); diff --git a/drivers/interconnect/qcom/icc-rpm-qos.h b/drivers/interconnect/qcom/icc-rpm-qos.h new file mode 100644 index 000000000000..625ac5f84ebc --- /dev/null +++ b/drivers/interconnect/qcom/icc-rpm-qos.h @@ -0,0 +1,133 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2020, AngeloGioacchino Del Regno [off-list ref] + */ + +#ifndef __DRIVERS_INTERCONNECT_QCOM_ICC_RPM_QOS_H__ +#define __DRIVERS_INTERCONNECT_QCOM_ICC_RPM_QOS_H__ + +#define RPM_BUS_MASTER_REQ 0x73616d62 +#define RPM_BUS_SLAVE_REQ 0x766c7362 + +/* BIMC QoS */ +#define M_BKE_REG_BASE(n) (0x300 + (0x4000 * n)) +#define M_BKE_EN_ADDR(n) (M_BKE_REG_BASE(n)) +#define M_BKE_HEALTH_CFG_ADDR(i, n) (M_BKE_REG_BASE(n) + 0x40 + (0x4 * i)) + +#define M_BKE_HEALTH_CFG_LIMITCMDS_MASK 0x80000000 +#define M_BKE_HEALTH_CFG_AREQPRIO_MASK 0x300 +#define M_BKE_HEALTH_CFG_PRIOLVL_MASK 0x3 +#define M_BKE_HEALTH_CFG_AREQPRIO_SHIFT 0x8 +#define M_BKE_HEALTH_CFG_LIMITCMDS_SHIFT 0x1f + +#define M_BKE_EN_EN_BMASK 0x1 + +/* Valid for both NoC and BIMC */ +#define NOC_QOS_MODE_FIXED 0x0 +#define NOC_QOS_MODE_LIMITER 0x1 +#define NOC_QOS_MODE_BYPASS 0x2 + +/* NoC QoS */ +#define NOC_PERM_MODE_FIXED 1 +#define NOC_PERM_MODE_BYPASS (1 << NOC_QOS_MODE_BYPASS) + +#define NOC_QOS_PRIORITYn_ADDR(n) (0x8 + (n * 0x1000)) +#define NOC_QOS_PRIORITY_MASK 0xf +#define NOC_QOS_PRIORITY_P1_SHIFT 0x2 +#define NOC_QOS_PRIORITY_P0_SHIFT 0x3 + +#define NOC_QOS_MODEn_ADDR(n) (0xc + (n * 0x1000)) +#define NOC_QOS_MODEn_MASK 0x3 + +#define to_qcom_provider(_provider) \ + container_of(_provider, struct qcom_icc_provider, provider) + +/** + * struct qcom_icc_provider - Qualcomm specific interconnect provider + * @provider: generic interconnect provider + * @bus_clks: the clk_bulk_data table of bus clocks + * @num_clks: the total number of clk_bulk_data entries + * @is_bimc_node: indicates whether to use bimc specific setting + * @regmap: regmap for QoS registers read/write access + * @mmio: NoC base iospace + */ +struct qcom_icc_provider { + struct icc_provider provider; + struct clk_bulk_data *bus_clks; + int num_clks; + bool is_bimc_node; + struct regmap *regmap; + void __iomem *mmio; +}; + +/** + * struct qcom_icc_qos - Qualcomm specific interconnect QoS parameters + * @areq_prio: node requests priority + * @prio_level: priority level for bus communication + * @limit_commands: activate/deactivate limiter mode during runtime + * @ap_owned: indicates if the node is owned by the AP or by the RPM + * @qos_mode: default qos mode for this node + * @qos_port: qos port number for finding qos registers of this node + */ +struct qcom_icc_qos { + u32 areq_prio; + u32 prio_level; + bool limit_commands; + bool ap_owned; + int qos_mode; + int qos_port; +}; + +/** + * struct qcom_icc_node - Qualcomm specific interconnect nodes + * @name: the node name used in debugfs + * @id: a unique node identifier + * @links: an array of nodes where we can go next while traversing + * @num_links: the total number of @links + * @buswidth: width of the interconnect between a node and the bus (bytes) + * @mas_rpm_id: RPM id for devices that are bus masters + * @slv_rpm_id: RPM id for devices that are bus slaves + * @qos: NoC QoS setting parameters + * @rate: current bus clock rate in Hz + */ + +#define MAX_LINKS 38 + +struct qcom_icc_node { + unsigned char *name; + u16 id; + u16 links[MAX_LINKS]; + u16 num_links; + u16 buswidth; + int mas_rpm_id; + int slv_rpm_id; + struct qcom_icc_qos qos; + u64 rate; +}; + +struct qcom_icc_desc { + struct qcom_icc_node **nodes; + size_t num_nodes; + const struct regmap_config *regmap_cfg; +}; + +#define DEFINE_QNODE(_name, _id, _buswidth, _mas_rpm_id, _slv_rpm_id, \ + _ap_owned, _qos_mode, _qos_prio, _qos_port, ...) \ + static struct qcom_icc_node _name = { \ + .name = #_name, \ + .id = _id, \ + .buswidth = _buswidth, \ + .mas_rpm_id = _mas_rpm_id, \ + .slv_rpm_id = _slv_rpm_id, \ + .qos.ap_owned = _ap_owned, \ + .qos.qos_mode = _qos_mode, \ + .qos.areq_prio = _qos_prio, \ + .qos.prio_level = _qos_prio, \ + .qos.qos_port = _qos_port, \ + .num_links = ARRAY_SIZE(((int[]){ __VA_ARGS__ })), \ + .links = { __VA_ARGS__ }, \ + } + +int qcom_icc_rpm_qos_set(struct icc_node *src, struct icc_node *dst); + +#endif diff --git a/drivers/interconnect/qcom/icc-rpmh.c b/drivers/interconnect/qcom/icc-rpmh.c index bf01d09dba6c..6f93273109a3 100644 --- a/drivers/interconnect/qcom/icc-rpmh.c +++ b/drivers/interconnect/qcom/icc-rpmh.c @@ -70,13 +70,13 @@ int qcom_icc_aggregate(struct icc_node *node, u32 tag, u32 avg_bw, EXPORT_SYMBOL_GPL(qcom_icc_aggregate); /** - * qcom_icc_set - set the constraints based on path + * qcom_icc_rpmh_set - set the constraints based on path * @src: source node for the path to set constraints on * @dst: destination node for the path to set constraints on * * Return: 0 on success, or an error code otherwise */ -int qcom_icc_set(struct icc_node *src, struct icc_node *dst) +int qcom_icc_rpmh_set(struct icc_node *src, struct icc_node *dst)This change should be splitted to a different commit, as it is not part of any commonization of the RPM QoS functions. This is a "global" rename, so you should create a preparation commit for this change.
Noted.
quoted
{ struct qcom_icc_provider *qp; struct qcom_icc_node *qn; @@ -99,7 +99,7 @@ int qcom_icc_set(struct icc_node *src, struct icc_node *dst) return 0; } -EXPORT_SYMBOL_GPL(qcom_icc_set); +EXPORT_SYMBOL_GPL(qcom_icc_rpmh_set); struct icc_node_data *qcom_icc_xlate_extended(struct of_phandle_args *spec, void *data) { diff --git a/drivers/interconnect/qcom/icc-rpmh.h b/drivers/interconnect/qcom/icc-rpmh.h index e5f61ab989e7..5dc1049dc065 100644 --- a/drivers/interconnect/qcom/icc-rpmh.h +++ b/drivers/interconnect/qcom/icc-rpmh.h @@ -130,7 +130,7 @@ struct qcom_icc_desc { int qcom_icc_aggregate(struct icc_node *node, u32 tag, u32 avg_bw, u32 peak_bw, u32 *agg_avg, u32 *agg_peak); -int qcom_icc_set(struct icc_node *src, struct icc_node *dst); +int qcom_icc_rpmh_set(struct icc_node *src, struct icc_node *dst);Same for this.quoted
struct icc_node_data *qcom_icc_xlate_extended(struct of_phandle_args *spec, void *data); int qcom_icc_bcm_init(struct qcom_icc_bcm *bcm, struct device *dev); void qcom_icc_pre_aggregate(struct icc_node *node); diff --git a/drivers/interconnect/qcom/sc7180.c b/drivers/interconnect/qcom/sc7180.c index 8d9044ed18ab..40232b41c080 100644 --- a/drivers/interconnect/qcom/sc7180.c +++ b/drivers/interconnect/qcom/sc7180.c @@ -532,7 +532,7 @@ static int qnoc_probe(struct platform_device *pdev) provider = &qp->provider; provider->dev = &pdev->dev; - provider->set = qcom_icc_set; + provider->set = qcom_icc_rpmh_set;And for this ... etc :))quoted
provider->pre_aggregate = qcom_icc_pre_aggregate; provider->aggregate = qcom_icc_aggregate; provider->xlate_extended = qcom_icc_xlate_extended; diff --git a/drivers/interconnect/qcom/sc7280.c b/drivers/interconnect/qcom/sc7280.c index 8d1b55c3705c..b84742debc13 100644 --- a/drivers/interconnect/qcom/sc7280.c +++ b/drivers/interconnect/qcom/sc7280.c @@ -1830,7 +1830,7 @@ static int qnoc_probe(struct platform_device *pdev) provider = &qp->provider; provider->dev = &pdev->dev; - provider->set = qcom_icc_set; + provider->set = qcom_icc_rpmh_set; provider->pre_aggregate = qcom_icc_pre_aggregate; provider->aggregate = qcom_icc_aggregate; provider->xlate_extended = qcom_icc_xlate_extended; diff --git a/drivers/interconnect/qcom/sdm660.c b/drivers/interconnect/qcom/sdm660.c index 632dbdd21915..acd026ecd17f 100644 --- a/drivers/interconnect/qcom/sdm660.c +++ b/drivers/interconnect/qcom/sdm660.c @@ -4,7 +4,6 @@ * Copyright (C) 2020, AngeloGioacchino Del Regno [off-list ref] */ -#include <dt-bindings/interconnect/qcom,sdm660.h>Why did you move this header down? If you have a reason, this is also not part of the RPM-QoS commonization.
Must have been by mistake. I tried to keep the order of things in msm8996.c similar to newer drivers, and I probably ended up editing sdm660.c as well without noticing it.
Thanks! - Angelo