// SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2017-2019, The Linux Foundation. All rights reserved. * */ #include <linux/bitmap.h> #include <linux/bitops.h> #include <linux/device.h> #include <linux/io.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/of.h> #include <linux/of_device.h> #include <linux/regmap.h> #include <linux/sizes.h> #include <linux/slab.h> #include <linux/soc/qcom/llcc-qcom.h> #define ACTIVATE BIT(0) #define DEACTIVATE BIT(1) #define ACT_CTRL_OPCODE_ACTIVATE BIT(0) #define ACT_CTRL_OPCODE_DEACTIVATE BIT(1) #define ACT_CTRL_ACT_TRIG BIT(0) #define ACT_CTRL_OPCODE_SHIFT 0x01 #define ATTR1_PROBE_TARGET_WAYS_SHIFT 0x02 #define ATTR1_FIXED_SIZE_SHIFT 0x03 #define ATTR1_PRIORITY_SHIFT 0x04 #define ATTR1_MAX_CAP_SHIFT 0x10 #define ATTR0_RES_WAYS_MASK GENMASK(11, 0) #define ATTR0_BONUS_WAYS_MASK GENMASK(27, 16) #define ATTR0_BONUS_WAYS_SHIFT 0x10 #define LLCC_STATUS_READ_DELAY 100 #define CACHE_LINE_SIZE_SHIFT 6 #define LLCC_COMMON_STATUS0 0x0003000c #define LLCC_LB_CNT_MASK GENMASK(31, 28) #define LLCC_LB_CNT_SHIFT 28 #define MAX_CAP_TO_BYTES(n) (n * SZ_1K) #define LLCC_TRP_ACT_CTRLn(n) (n * SZ_4K) #define LLCC_TRP_STATUSn(n) (4 + n * SZ_4K) #define LLCC_TRP_ATTR0_CFGn(n) (0x21000 + SZ_8 * n) #define LLCC_TRP_ATTR1_CFGn(n) (0x21004 + SZ_8 * n) #define BANK_OFFSET_STRIDE 0x80000 /** * llcc_slice_config - Data associated with the llcc slice * @usecase_id: Unique id for the client's use case * @slice_id: llcc slice id for each client * @max_cap: The maximum capacity of the cache slice provided in KB * @priority: Priority of the client used to select victim line for replacement * @fixed_size: Boolean indicating if the slice has a fixed capacity * @bonus_ways: Bonus ways are additional ways to be used for any slice, * if client ends up using more than reserved cache ways. Bonus * ways are allocated only if they are not reserved for some * other client. * @res_ways: Reserved ways for the cache slice, the reserved ways cannot * be used by any other client than the one its assigned to. * @cache_mode: Each slice operates as a cache, this controls the mode of the * slice: normal or TCM(Tightly Coupled Memory) * @probe_target_ways: Determines what ways to probe for access hit. When * configured to 1 only bonus and reserved ways are probed. * When configured to 0 all ways in llcc are probed. * @dis_cap_alloc: Disable capacity based allocation for a client * @retain_on_pc: If this bit is set and client has maintained active vote * then the ways assigned to this client are not flushed on power * collapse. * @activate_on_init: Activate the slice immediately after it is programmed */ struct llcc_slice_config { u32 usecase_id; u32 slice_id; u32 max_cap; u32 priority; bool fixed_size; u32 bonus_ways; u32 res_ways; u32 cache_mode; u32 probe_target_ways; bool dis_cap_alloc; bool retain_on_pc; bool activate_on_init; }; struct qcom_llcc_config { const struct llcc_slice_config *sct_data; int size; }; static const struct llcc_slice_config sc7180_data[] = { { LLCC_CPUSS, 1, 256, 1, 0, 0xf, 0x0, 0, 0, 0, 1, 1 }, { LLCC_MDM, 8, 128, 1, 0, 0xf, 0x0, 0, 0, 0, 1, 0 }, { LLCC_GPUHTW, 11, 128, 1, 0, 0xf, 0x0, 0, 0, 0, 1, 0 }, { LLCC_GPU, 12, 128, 1, 0, 0xf, 0x0, 0, 0, 0, 1, 0 }, }; static const struct llcc_slice_config sdm845_data[] = { { LLCC_CPUSS, 1, 2816, 1, 0, 0xffc, 0x2, 0, 0, 1, 1, 1 }, { LLCC_VIDSC0, 2, 512, 2, 1, 0x0, 0x0f0, 0, 0, 1, 1, 0 }, { LLCC_VIDSC1, 3, 512, 2, 1, 0x0, 0x0f0, 0, 0, 1, 1, 0 }, { LLCC_ROTATOR, 4, 563, 2, 1, 0x0, 0x00e, 2, 0, 1, 1, 0 }, { LLCC_VOICE, 5, 2816, 1, 0, 0xffc, 0x2, 0, 0, 1, 1, 0 }, { LLCC_AUDIO, 6, 2816, 1, 0, 0xffc, 0x2, 0, 0, 1, 1, 0 }, { LLCC_MDMHPGRW, 7, 1024, 2, 0, 0xfc, 0xf00, 0, 0, 1, 1, 0 }, { LLCC_MDM, 8, 2816, 1, 0, 0xffc, 0x2, 0, 0, 1, 1, 0 }, { LLCC_CMPT, 10, 2816, 1, 0, 0xffc, 0x2, 0, 0, 1, 1, 0 }, { LLCC_GPUHTW, 11, 512, 1, 1, 0xc, 0x0, 0, 0, 1, 1, 0 }, { LLCC_GPU, 12, 2304, 1, 0, 0xff0, 0x2, 0, 0, 1, 1, 0 }, { LLCC_MMUHWT, 13, 256, 2, 0, 0x0, 0x1, 0, 0, 1, 0, 1 }, { LLCC_CMPTDMA, 15, 2816, 1, 0, 0xffc, 0x2, 0, 0, 1, 1, 0 }, { LLCC_DISP, 16, 2816, 1, 0, 0xffc, 0x2, 0, 0, 1, 1, 0 }, { LLCC_VIDFW, 17, 2816, 1, 0, 0xffc, 0x2, 0, 0, 1, 1, 0 }, { LLCC_MDMHPFX, 20, 1024, 2, 1, 0x0, 0xf00, 0, 0, 1, 1, 0 }, { LLCC_MDMPNG, 21, 1024, 0, 1, 0x1e, 0x0, 0, 0, 1, 1, 0 }, { LLCC_AUDHW, 22, 1024, 1, 1, 0xffc, 0x2, 0, 0, 1, 1, 0 }, }; static const struct qcom_llcc_config sc7180_cfg = { .sct_data = sc7180_data, .size = ARRAY_SIZE(sc7180_data), }; static const struct qcom_llcc_config sdm845_cfg = { .sct_data = sdm845_data, .size = ARRAY_SIZE(sdm845_data), }; static struct llcc_drv_data *drv_data = (void *) -EPROBE_DEFER; /** * llcc_slice_getd - get llcc slice descriptor * @uid: usecase_id for the client * * A pointer to llcc slice descriptor will be returned on success and * and error pointer is returned on failure */ struct llcc_slice_desc *llcc_slice_getd(u32 uid) { const struct llcc_slice_config *cfg; struct llcc_slice_desc *desc; u32 sz, count; if (IS_ERR(drv_data)) return ERR_CAST(drv_data); cfg = drv_data->cfg; sz = drv_data->cfg_size; for (count = 0; cfg && count < sz; count++, cfg++) if (cfg->usecase_id == uid) break; if (count == sz || !cfg) return ERR_PTR(-ENODEV); desc = kzalloc(sizeof(*desc), GFP_KERNEL); if (!desc) return ERR_PTR(-ENOMEM); desc->slice_id = cfg->slice_id; desc->slice_size = cfg->max_cap; return desc; } EXPORT_SYMBOL_GPL(llcc_slice_getd); /** * llcc_slice_putd - llcc slice descritpor * @desc: Pointer to llcc slice descriptor */ void llcc_slice_putd(struct llcc_slice_desc *desc) { if (!IS_ERR_OR_NULL(desc)) kfree(desc); } EXPORT_SYMBOL_GPL(llcc_slice_putd); static int llcc_update_act_ctrl(u32 sid, u32 act_ctrl_reg_val, u32 status) { u32 act_ctrl_reg; u32 status_reg; u32 slice_status; int ret; if (IS_ERR(drv_data)) return PTR_ERR(drv_data); act_ctrl_reg = LLCC_TRP_ACT_CTRLn(sid); status_reg = LLCC_TRP_STATUSn(sid); /* Set the ACTIVE trigger */ act_ctrl_reg_val |= ACT_CTRL_ACT_TRIG; ret = regmap_write(drv_data->bcast_regmap, act_ctrl_reg, act_ctrl_reg_val); if (ret) return ret; /* Clear the ACTIVE trigger */ act_ctrl_reg_val &= ~ACT_CTRL_ACT_TRIG; ret = regmap_write(drv_data->bcast_regmap, act_ctrl_reg, act_ctrl_reg_val); if (ret) return ret; ret = regmap_read_poll_timeout(drv_data->bcast_regmap, status_reg, slice_status, !(slice_status & status), 0, LLCC_STATUS_READ_DELAY); return ret; } /** * llcc_slice_activate - Activate the llcc slice * @desc: Pointer to llcc slice descriptor * * A value of zero will be returned on success and a negative errno will * be returned in error cases */ int llcc_slice_activate(struct llcc_slice_desc *desc) { int ret; u32 act_ctrl_val; if (IS_ERR(drv_data)) return PTR_ERR(drv_data); if (IS_ERR_OR_NULL(desc)) return -EINVAL; mutex_lock(&drv_data->lock); if (test_bit(desc->slice_id, drv_data->bitmap)) { mutex_unlock(&drv_data->lock); return 0; } act_ctrl_val = ACT_CTRL_OPCODE_ACTIVATE << ACT_CTRL_OPCODE_SHIFT; ret = llcc_update_act_ctrl(desc->slice_id, act_ctrl_val, DEACTIVATE); if (ret) { mutex_unlock(&drv_data->lock); return ret; } __set_bit(desc->slice_id, drv_data->bitmap); mutex_unlock(&drv_data->lock); return ret; } EXPORT_SYMBOL_GPL(llcc_slice_activate); /** * llcc_slice_deactivate - Deactivate the llcc slice * @desc: Pointer to llcc slice descriptor * * A value of zero will be returned on success and a negative errno will * be returned in error cases */ int llcc_slice_deactivate(struct llcc_slice_desc *desc) { u32 act_ctrl_val; int ret; if (IS_ERR(drv_data)) return PTR_ERR(drv_data); if (IS_ERR_OR_NULL(desc)) return -EINVAL; mutex_lock(&drv_data->lock); if (!test_bit(desc->slice_id, drv_data->bitmap)) { mutex_unlock(&drv_data->lock); return 0; } act_ctrl_val = ACT_CTRL_OPCODE_DEACTIVATE << ACT_CTRL_OPCODE_SHIFT; ret = llcc_update_act_ctrl(desc->slice_id, act_ctrl_val, ACTIVATE); if (ret) { mutex_unlock(&drv_data->lock); return ret; } __clear_bit(desc->slice_id, drv_data->bitmap); mutex_unlock(&drv_data->lock); return ret; } EXPORT_SYMBOL_GPL(llcc_slice_deactivate); /** * llcc_get_slice_id - return the slice id * @desc: Pointer to llcc slice descriptor */ int llcc_get_slice_id(struct llcc_slice_desc *desc) { if (IS_ERR_OR_NULL(desc)) return -EINVAL; return desc->slice_id; } EXPORT_SYMBOL_GPL(llcc_get_slice_id); /** * llcc_get_slice_size - return the slice id * @desc: Pointer to llcc slice descriptor */ size_t llcc_get_slice_size(struct llcc_slice_desc *desc) { if (IS_ERR_OR_NULL(desc)) return 0; return desc->slice_size; } EXPORT_SYMBOL_GPL(llcc_get_slice_size); static int qcom_llcc_cfg_program(struct platform_device *pdev) { int i; u32 attr1_cfg; u32 attr0_cfg; u32 attr1_val; u32 attr0_val; u32 max_cap_cacheline; u32 sz; int ret = 0; const struct llcc_slice_config *llcc_table; struct llcc_slice_desc desc; sz = drv_data->cfg_size; llcc_table = drv_data->cfg; for (i = 0; i < sz; i++) { attr1_cfg = LLCC_TRP_ATTR1_CFGn(llcc_table[i].slice_id); attr0_cfg = LLCC_TRP_ATTR0_CFGn(llcc_table[i].slice_id); attr1_val = llcc_table[i].cache_mode; attr1_val |= llcc_table[i].probe_target_ways << ATTR1_PROBE_TARGET_WAYS_SHIFT; attr1_val |= llcc_table[i].fixed_size << ATTR1_FIXED_SIZE_SHIFT; attr1_val |= llcc_table[i].priority << ATTR1_PRIORITY_SHIFT; max_cap_cacheline = MAX_CAP_TO_BYTES(llcc_table[i].max_cap); /* LLCC instances can vary for each target. * The SW writes to broadcast register which gets propagated * to each llcc instace (llcc0,.. llccN). * Since the size of the memory is divided equally amongst the * llcc instances, we need to configure the max cap accordingly. */ max_cap_cacheline = max_cap_cacheline / drv_data->num_banks; max_cap_cacheline >>= CACHE_LINE_SIZE_SHIFT; attr1_val |= max_cap_cacheline << ATTR1_MAX_CAP_SHIFT; attr0_val = llcc_table[i].res_ways & ATTR0_RES_WAYS_MASK; attr0_val |= llcc_table[i].bonus_ways << ATTR0_BONUS_WAYS_SHIFT; ret = regmap_write(drv_data->bcast_regmap, attr1_cfg, attr1_val); if (ret) return ret; ret = regmap_write(drv_data->bcast_regmap, attr0_cfg, attr0_val); if (ret) return ret; if (llcc_table[i].activate_on_init) { desc.slice_id = llcc_table[i].slice_id; ret = llcc_slice_activate(&desc); } } return ret; } static int qcom_llcc_remove(struct platform_device *pdev) { /* Set the global pointer to a error code to avoid referencing it */ drv_data = ERR_PTR(-ENODEV); return 0; } static struct regmap *qcom_llcc_init_mmio(struct platform_device *pdev, const char *name) { struct resource *res; void __iomem *base; struct regmap_config llcc_regmap_config = { .reg_bits = 32, .reg_stride = 4, .val_bits = 32, .fast_io = true, }; res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name); if (!res) return ERR_PTR(-ENODEV); base = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(base)) return ERR_CAST(base); llcc_regmap_config.name = name; return devm_regmap_init_mmio(&pdev->dev, base, &llcc_regmap_config); } static int qcom_llcc_probe(struct platform_device *pdev) { u32 num_banks; struct device *dev = &pdev->dev; int ret, i; struct platform_device *llcc_edac; const struct qcom_llcc_config *cfg; const struct llcc_slice_config *llcc_cfg; u32 sz; drv_data = devm_kzalloc(dev, sizeof(*drv_data), GFP_KERNEL); if (!drv_data) { ret = -ENOMEM; goto err; } drv_data->regmap = qcom_llcc_init_mmio(pdev, "llcc_base"); if (IS_ERR(drv_data->regmap)) { ret = PTR_ERR(drv_data->regmap); goto err; } drv_data->bcast_regmap = qcom_llcc_init_mmio(pdev, "llcc_broadcast_base"); if (IS_ERR(drv_data->bcast_regmap)) { ret = PTR_ERR(drv_data->bcast_regmap); goto err; } ret = regmap_read(drv_data->regmap, LLCC_COMMON_STATUS0, &num_banks); if (ret) goto err; num_banks &= LLCC_LB_CNT_MASK; num_banks >>= LLCC_LB_CNT_SHIFT; drv_data->num_banks = num_banks; cfg = of_device_get_match_data(&pdev->dev); llcc_cfg = cfg->sct_data; sz = cfg->size; for (i = 0; i < sz; i++) if (llcc_cfg[i].slice_id > drv_data->max_slices) drv_data->max_slices = llcc_cfg[i].slice_id; drv_data->offsets = devm_kcalloc(dev, num_banks, sizeof(u32), GFP_KERNEL); if (!drv_data->offsets) { ret = -ENOMEM; goto err; } for (i = 0; i < num_banks; i++) drv_data->offsets[i] = i * BANK_OFFSET_STRIDE; drv_data->bitmap = devm_kcalloc(dev, BITS_TO_LONGS(drv_data->max_slices), sizeof(unsigned long), GFP_KERNEL); if (!drv_data->bitmap) { ret = -ENOMEM; goto err; } drv_data->cfg = llcc_cfg; drv_data->cfg_size = sz; mutex_init(&drv_data->lock); platform_set_drvdata(pdev, drv_data); ret = qcom_llcc_cfg_program(pdev); if (ret) goto err; drv_data->ecc_irq = platform_get_irq(pdev, 0); if (drv_data->ecc_irq >= 0) { llcc_edac = platform_device_register_data(&pdev->dev, "qcom_llcc_edac", -1, drv_data, sizeof(*drv_data)); if (IS_ERR(llcc_edac)) dev_err(dev, "Failed to register llcc edac driver\n"); } return 0; err: drv_data = ERR_PTR(-ENODEV); return ret; } static const struct of_device_id qcom_llcc_of_match[] = { { .compatible = "qcom,sc7180-llcc", .data = &sc7180_cfg }, { .compatible = "qcom,sdm845-llcc", .data = &sdm845_cfg }, { } }; static struct platform_driver qcom_llcc_driver = { .driver = { .name = "qcom-llcc", .of_match_table = qcom_llcc_of_match, }, .probe = qcom_llcc_probe, .remove = qcom_llcc_remove, }; module_platform_driver(qcom_llcc_driver); MODULE_DESCRIPTION("Qualcomm Last Level Cache Controller"); MODULE_LICENSE("GPL v2");