diff --git a/drivers/interconnect/Kconfig b/drivers/interconnect/Kconfig index 07a8276fa35a..ac41ea6a56ce 100644 --- a/drivers/interconnect/Kconfig +++ b/drivers/interconnect/Kconfig @@ -11,5 +11,6 @@ menuconfig INTERCONNECT if INTERCONNECT source "drivers/interconnect/qcom/Kconfig" +source "drivers/interconnect/mediatek/Kconfig" endif diff --git a/drivers/interconnect/Makefile b/drivers/interconnect/Makefile index 28f2ab0824d5..253f24a3fb40 100644 --- a/drivers/interconnect/Makefile +++ b/drivers/interconnect/Makefile @@ -4,3 +4,4 @@ icc-core-objs := core.o obj-$(CONFIG_INTERCONNECT) += icc-core.o obj-$(CONFIG_INTERCONNECT_QCOM) += qcom/ +obj-$(CONFIG_INTERCONNECT_MTK) += mediatek/ diff --git a/drivers/interconnect/mediatek/Kconfig b/drivers/interconnect/mediatek/Kconfig new file mode 100644 index 000000000000..2cb0ffa9a9f8 --- /dev/null +++ b/drivers/interconnect/mediatek/Kconfig @@ -0,0 +1,17 @@ +config INTERCONNECT_MTK + bool "Mediatek Network-on-Chip interconnect drivers" + depends on ARCH_MEDIATEK + help + Support for Mediatek's Network-on-Chip interconnect hardware. + +config INTERCONNECT_MTK_EMI + tristate "Mediatek EMI interconnect driver" + depends on INTERCONNECT_MTK + depends on (MTK_DVFSRC && OF) + help + This is a driver for the Mediatek Network-on-Chip + with DVFSRC-based platforms. + The Mediatek EMI(external memory interface) Interconnect driver + will aggregate require EMI BW of users to DVFSRC(dynamic voltage + and frequency scaling resource collector). The DVFSRC will adjust + appropriate DRAM frequency to fulfill this bandwidth request. \ No newline at end of file diff --git a/drivers/interconnect/mediatek/Makefile b/drivers/interconnect/mediatek/Makefile new file mode 100644 index 000000000000..42ac75451cd8 --- /dev/null +++ b/drivers/interconnect/mediatek/Makefile @@ -0,0 +1,5 @@ +# SPDX-License-Identifier: GPL-2.0 + +mtk-emi-objs := emi.o + +obj-$(CONFIG_INTERCONNECT_MTK_EMI) += mtk-emi.o \ No newline at end of file diff --git a/drivers/interconnect/mediatek/emi.c b/drivers/interconnect/mediatek/emi.c new file mode 100644 index 000000000000..d9ffc7e36264 --- /dev/null +++ b/drivers/interconnect/mediatek/emi.c @@ -0,0 +1,253 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2019 MediaTek Inc. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +enum mtk_icc_name { + SLAVE_DDR_EMI, + MASTER_MCUSYS, + MASTER_GPUSYS, + MASTER_MMSYS, + MASTER_MM_VPU, + MASTER_MM_DISP, + MASTER_MM_VDEC, + MASTER_MM_VENC, + MASTER_MM_CAM, + MASTER_MM_IMG, + MASTER_MM_MDP, + MASTER_VPUSYS, + MASTER_VPU_PORT_0, + MASTER_VPU_PORT_1, + MASTER_MDLASYS, + MASTER_MDLA_PORT_0, +}; + +#define MAX_LINKS 6 + +/** + * struct mtk_icc_node - Mediatek specific interconnect nodes + * @name: the node name used in debugfs + * @links: an array of nodes where we can go next while traversing + * @id: a unique node identifier + * @num_links: the total number of @links + * @buswidth: width of the interconnect between a node and the bus + * @sum_avg: current sum aggregate value of all avg bw [kBps] requests + * @max_peak: current max aggregate value of all peak bw [kBps] requests + */ +struct mtk_icc_node { + unsigned char *name; + bool ep; + u16 id; + u16 links[MAX_LINKS]; + u16 num_links; + u16 buswidth; + u64 sum_avg; + u64 sum_peak; +}; + +struct mtk_icc_desc { + struct mtk_icc_node **nodes; + size_t num_nodes; +}; + +#define DEFINE_MNODE(_name, _id, _buswidth, _ep, _numlinks, ...) \ + static struct mtk_icc_node _name = { \ + .name = #_name, \ + .id = _id, \ + .buswidth = _buswidth, \ + .ep = _ep, \ + .num_links = ARRAY_SIZE(((int[]){ __VA_ARGS__ })), \ + .links = { __VA_ARGS__ }, \ +} + +DEFINE_MNODE(ddr_emi, SLAVE_DDR_EMI, 1024, 1, 0, 0); +DEFINE_MNODE(mcusys, MASTER_MCUSYS, 256, 0, 1, SLAVE_DDR_EMI); +DEFINE_MNODE(gpu, MASTER_GPUSYS, 256, 0, 1, SLAVE_DDR_EMI); +DEFINE_MNODE(mmsys, MASTER_MMSYS, 256, 0, 1, SLAVE_DDR_EMI); +DEFINE_MNODE(mm_vpu, MASTER_MM_VPU, 128, 0, 1, MASTER_MMSYS); +DEFINE_MNODE(mm_disp, MASTER_MM_DISP, 128, 0, 1, MASTER_MMSYS); +DEFINE_MNODE(mm_vdec, MASTER_MM_VDEC, 128, 0, 1, MASTER_MMSYS); +DEFINE_MNODE(mm_venc, MASTER_MM_VENC, 128, 0, 1, MASTER_MMSYS); +DEFINE_MNODE(mm_cam, MASTER_MM_CAM, 128, 0, 1, MASTER_MMSYS); +DEFINE_MNODE(mm_img, MASTER_MM_IMG, 128, 0, 1, MASTER_MMSYS); +DEFINE_MNODE(mm_mdp, MASTER_MM_MDP, 128, 0, 1, MASTER_MMSYS); +DEFINE_MNODE(vpusys, MASTER_VPUSYS, 256, 0, 1, SLAVE_DDR_EMI); +DEFINE_MNODE(vpu_port_0, MASTER_VPU_PORT_0, 128, 0, 1, MASTER_VPUSYS); +DEFINE_MNODE(vpu_port_1, MASTER_VPU_PORT_1, 128, 0, 1, MASTER_VPUSYS); +DEFINE_MNODE(mdlasys, MASTER_MDLASYS, 256, 0, 1, SLAVE_DDR_EMI); +DEFINE_MNODE(mdla_port_0, MASTER_MDLA_PORT_0, 256, 0, 1, MASTER_MDLASYS); + + +static struct mtk_icc_node *mt6779_icc_nodes[] = { + [MT6779_SLAVE_DDR_EMI] = &ddr_emi, + [MT6779_MASTER_MCUSYS] = &mcusys, + [MT6779_MASTER_GPU] = &gpu, + [MT6779_MASTER_MMSYS] = &mmsys, + [MT6779_MASTER_MM_VPU] = &mm_vpu, + [MT6779_MASTER_MM_DISP] = &mm_disp, + [MT6779_MASTER_MM_VDEC] = &mm_vdec, + [MT6779_MASTER_MM_VENC] = &mm_venc, + [MT6779_MASTER_MM_CAM] = &mm_cam, + [MT6779_MASTER_MM_IMG] = &mm_img, + [MT6779_MASTER_MM_MDP] = &mm_mdp, + [MT6779_MASTER_VPUSYS] = &vpusys, + [MT6779_MASTER_VPU_0] = &vpu_port_0, + [MT6779_MASTER_VPU_1] = &vpu_port_1, + [MT6779_MASTER_MDLASYS] = &mdlasys, + [MT6779_MASTER_MDLA_0] = &mdla_port_0, +}; + +static struct mtk_icc_desc mt6779_icc = { + .nodes = mt6779_icc_nodes, + .num_nodes = ARRAY_SIZE(mt6779_icc_nodes), +}; + +static int emi_icc_aggregate(struct icc_node *node, u32 avg_bw, + u32 peak_bw, u32 *agg_avg, u32 *agg_peak) +{ + struct mtk_icc_node *in; + + in = node->data; + + *agg_avg += avg_bw; + *agg_peak += peak_bw; + + in->sum_avg = *agg_avg; + in->sum_peak = *agg_peak; + + return 0; +} + +static int emi_icc_set(struct icc_node *src, struct icc_node *dst) +{ + int ret = 0; + struct mtk_icc_node *node; + + node = dst->data; + if (node->ep) { + pr_debug("sum_avg (%llu), max_peak (%llu)\n", + node->sum_avg, node->sum_peak); + mtk_dvfsrc_send_request(src->provider->dev->parent, + MTK_DVFSRC_CMD_BW_REQUEST, + node->sum_avg); + mtk_dvfsrc_send_request(src->provider->dev->parent, + MTK_DVFSRC_CMD_HRTBW_REQUEST, + node->sum_peak); + } + + return ret; +} + +static int emi_icc_probe(struct platform_device *pdev) +{ + int ret; + const struct mtk_icc_desc *desc; + struct icc_node *node; + struct icc_onecell_data *data; + struct icc_provider *provider; + struct mtk_icc_node **mnodes; + size_t num_nodes, i, j; + + desc = of_device_get_match_data(&pdev->dev); + if (!desc) + return -EINVAL; + + mnodes = desc->nodes; + num_nodes = desc->num_nodes; + + provider = devm_kzalloc(&pdev->dev, sizeof(*provider), GFP_KERNEL); + if (!provider) + return -ENOMEM; + + data = devm_kcalloc(&pdev->dev, num_nodes, sizeof(*node), GFP_KERNEL); + if (!data) + return -ENOMEM; + + provider->dev = &pdev->dev; + provider->set = emi_icc_set; + provider->aggregate = emi_icc_aggregate; + provider->xlate = of_icc_xlate_onecell; + INIT_LIST_HEAD(&provider->nodes); + provider->data = data; + + ret = icc_provider_add(provider); + if (ret) { + dev_err(&pdev->dev, "error adding interconnect provider\n"); + return ret; + } + + for (i = 0; i < num_nodes; i++) { + node = icc_node_create(mnodes[i]->id); + if (IS_ERR(node)) { + ret = PTR_ERR(node); + goto err; + } + + node->name = mnodes[i]->name; + node->data = mnodes[i]; + icc_node_add(node, provider); + + dev_dbg(&pdev->dev, "registered node %s, num link: %d\n", + mnodes[i]->name, mnodes[i]->num_links); + + /* populate links */ + for (j = 0; j < mnodes[i]->num_links; j++) + icc_link_create(node, mnodes[i]->links[j]); + + data->nodes[i] = node; + } + data->num_nodes = num_nodes; + + platform_set_drvdata(pdev, provider); + + return 0; +err: + list_for_each_entry(node, &provider->nodes, node_list) { + icc_node_del(node); + icc_node_destroy(node->id); + } + + icc_provider_del(provider); + return ret; +} + +static int emi_icc_remove(struct platform_device *pdev) +{ + struct icc_provider *provider = platform_get_drvdata(pdev); + struct icc_node *n; + + list_for_each_entry(n, &provider->nodes, node_list) { + icc_node_del(n); + icc_node_destroy(n->id); + } + + return icc_provider_del(provider); +} + +static const struct of_device_id emi_icc_of_match[] = { + { .compatible = "mediatek,mt6779-emi", .data = &mt6779_icc }, + { }, +}; +MODULE_DEVICE_TABLE(of, emi_icc_of_match); + +static struct platform_driver emi_icc_driver = { + .probe = emi_icc_probe, + .remove = emi_icc_remove, + .driver = { + .name = "mediatek-emi-icc", + .of_match_table = emi_icc_of_match, + }, +}; +module_platform_driver(emi_icc_driver); + +MODULE_AUTHOR("Henry Chen "); +MODULE_LICENSE("GPL v2");