Retrieve System Cache Table (SCT) descriptors from a shared memory region populated by firmware.
SCT initialization and programming are performed entirely by firmware outside of Linux. The LLCC driver only consumes the pre-initialized descriptor data and does not configure SCT itself. Support this mechanism for future SoCs that provide SCT programming via firmware. Signed-off-by: Francisco Munoz Ruiz <[email protected]> Reviewed-by: Konrad Dybcio <[email protected]> --- drivers/soc/qcom/llcc-qcom.c | 269 ++++++++++++++++++++++++++++++++----- include/linux/soc/qcom/llcc-qcom.h | 8 +- 2 files changed, 240 insertions(+), 37 deletions(-) diff --git a/drivers/soc/qcom/llcc-qcom.c b/drivers/soc/qcom/llcc-qcom.c index 0161ceec8842..f8cd35b205eb 100644 --- a/drivers/soc/qcom/llcc-qcom.c +++ b/drivers/soc/qcom/llcc-qcom.c @@ -5,7 +5,6 @@ */ #include <linux/bitfield.h> -#include <linux/bitops.h> #include <linux/cleanup.h> #include <linux/device.h> #include <linux/io.h> @@ -14,6 +13,7 @@ #include <linux/mutex.h> #include <linux/nvmem-consumer.h> #include <linux/of.h> +#include <linux/of_reserved_mem.h> #include <linux/regmap.h> #include <linux/sizes.h> #include <linux/slab.h> @@ -76,6 +76,12 @@ #define LLCC_VERSION_4_1_0_0 0x04010000 #define LLCC_VERSION_6_0_0_0 0X06000000 +#define SLC_SCT_MEM_LAYOUT_VERSION1 1 /* SCT Memory layout version */ +#define SLC_SCT_DONE 0x00534354444f4e45 /* SCT programming OK */ +#define SLC_SCT_FAIL 0x005343544641494c /* SCT programming failed */ +#define SLC_SCT_NAME_LEN 15 +#define SLC_SCT_SLICE_ACT_ON_BOOT BIT(25) + /** * struct llcc_slice_config - Data associated with the llcc slice * @usecase_id: Unique id for the client's use case @@ -143,6 +149,87 @@ struct llcc_slice_config { u32 parent_slice_id; }; +/* + * struct slc_sct_error - Represents SCT error + * @code: FW code status + * @param: Holds the SCT programming error + */ +struct slc_sct_error { + __le64 code; + __le64 param; +} __packed; + +/* + * struct slc_sct_status - SCT programming status + * @program_status: Indicates programming success or failure + * @version: SCT mem layout version + * @error: Error enum and its param + */ +struct slc_sct_status { + __le64 program_status; + /* Use the lower 8 bits */ + __le64 version; + struct slc_sct_error error; +} __packed; + +/* + * struct slc_sct_details - SCT details + * @revision: revision of the SCT table + * @name: name of the SCT table + */ +struct slc_sct_details { + u8 revision; + char name[SLC_SCT_NAME_LEN]; +} __packed; + +/* + * struct tcm_mem_info - SC TCM Shared memory details + * @is_present: is TCM region present + * @offset: offset of TCM shared memory details + */ +struct slc_tcm_mem_info { + __le32 is_present; + __le32 offset; +} __packed; + +/* + * struct slc_sct_slice_desc - Slice descriptor definition used in shmem + * @slice_id: SCID of the slice + * @usecase_id: Usecase ID of the slice + * @slice_properties: + * slice_size: Contains the slice descriptor size - 20 bit wide + * rsvd: Reserved space - 4 bit wide + * flags: Flags for descriptors - 3 bit wide + * MPAM SCID: Bit 24 + * Activate on boot: Bit 25 + * Non-HLOS SCID: Bit 26 + * HWMutex: Ensures only one processor (CPU or MCU) at a time can + * access the LLCC hardware resources - 5 bit wide + */ +struct slc_sct_slice_desc { + __le16 slice_id; + __le16 usecase_id; + __le32 slice_properties; +} __packed; + +/* + * struct slc_sct_mem - Shared memory structure + * @sct_status: Status of SCT programming + * @sct_details: Sct revision and name details + * @tcm_mem_info: TCM shared memory presence & offset info + * @slice_descs_count: Number of slice desc present in SCT + * @scid_max: Maximum no. of SCIDs supported + * @slice_descs: Array of SCT slice desc + */ +struct slc_sct_mem { + struct slc_sct_status sct_status; + struct slc_sct_details sct_details; + struct slc_tcm_mem_info tcm_mem_info; + __le32 slice_descs_count; + __le32 scid_max; + struct slc_sct_slice_desc slice_descs[] __counted_by_le(slice_descs_count); +} __packed; + struct qcom_llcc_config { const struct llcc_slice_config *sct_data; const u32 *reg_offset; @@ -4141,6 +4228,15 @@ static const u32 llcc_v6_reg_offset[] = { [LLCC_TRP_WRS_CACHEABLE_EN] = 0x00042088, }; +static const struct qcom_llcc_config hawi_sct_cfg[] = { + { + .sct_data = NULL, + .size = 0, + .reg_offset = llcc_v6_reg_offset, + .edac_reg_offset = &llcc_v6_edac_reg_offset, + }, +}; + static const struct qcom_llcc_config kaanapali_cfg[] = { { .sct_data = kaanapali_data, @@ -4397,6 +4493,11 @@ static const struct qcom_llcc_config x1e80100_cfg[] = { }, }; +static const struct qcom_sct_config hawi_sct_cfgs = { + .llcc_config = hawi_sct_cfg, + .num_config = ARRAY_SIZE(hawi_sct_cfg), +}; + static const struct qcom_sct_config kaanapali_cfgs = { .llcc_config = kaanapali_cfg, .num_config = ARRAY_SIZE(kaanapali_cfg), @@ -4533,23 +4634,20 @@ static struct llcc_drv_data *drv_data = (void *) -EPROBE_DEFER; */ struct llcc_slice_desc *llcc_slice_getd(u32 uid) { - const struct llcc_slice_config *cfg; - u32 sz, i; - if (IS_ERR(drv_data)) return ERR_CAST(drv_data); - cfg = drv_data->cfg; - sz = drv_data->cfg_size; + if (IS_ERR_OR_NULL(drv_data->desc)) + return ERR_PTR(-ENODEV); - for (i = 0; cfg && i < sz; i++, cfg++) - if (cfg->usecase_id == uid) - break; + for (u32 i = 0; i < drv_data->cfg_size; i++) { + if (uid == drv_data->desc[i].uid) + return &drv_data->desc[i]; + } - if (i == sz) - return ERR_PTR(-ENODEV); + dev_err(drv_data->dev, "Failed to get slice desc for uid: %u\n", uid); - return &drv_data->desc[i]; + return ERR_PTR(-EINVAL); } EXPORT_SYMBOL_GPL(llcc_slice_getd); @@ -5029,6 +5127,12 @@ static int qcom_llcc_cfg_program(struct platform_device *pdev, sz = drv_data->cfg_size; llcc_table = drv_data->cfg; + for (i = 0; i < sz; i++) { + drv_data->desc[i].uid = llcc_table[i].usecase_id; + drv_data->desc[i].slice_id = llcc_table[i].slice_id; + drv_data->desc[i].slice_size = llcc_table[i].max_cap; + } + if (drv_data->version >= LLCC_VERSION_6_0_0_0) { for (i = 0; i < sz; i++) { ret = _qcom_llcc_cfg_program_v6(&llcc_table[i], cfg); @@ -5064,6 +5168,101 @@ static int qcom_llcc_get_cfg_index(struct platform_device *pdev, u8 *cfg_index, return ret; } +static int qcom_llcc_verify_fw_config(struct device *dev, + const struct slc_sct_mem *slc_mem) +{ + u64 program_status; + + program_status = le64_to_cpu(slc_mem->sct_status.program_status); + + if (program_status == SLC_SCT_DONE) { + u32 desc_count = le32_to_cpu(slc_mem->slice_descs_count); + u32 scid_max = le32_to_cpu(slc_mem->scid_max); + + if (desc_count > scid_max) { + dev_err(dev, "Descriptor count above max limit (%u > %u)\n", + desc_count, scid_max); + return -EINVAL; + } + + u8 revision = slc_mem->sct_details.revision; + char name_buf[SLC_SCT_NAME_LEN]; + + memcpy(name_buf, slc_mem->sct_details.name, + SLC_SCT_NAME_LEN - 1); + name_buf[SLC_SCT_NAME_LEN - 1] = '\0'; + + dev_dbg(dev, "SCT init: desc_count=%u, rev=%u, name=%s\n", + desc_count, revision, name_buf); + + return 0; + } else if (program_status == SLC_SCT_FAIL) { + u8 version = (u8)(le64_to_cpu(slc_mem->sct_status.version)); + u64 code = le64_to_cpu(slc_mem->sct_status.error.code); + u64 param = le64_to_cpu(slc_mem->sct_status.error.param); + + if (version == SLC_SCT_MEM_LAYOUT_VERSION1) { + dev_err(dev, "SCT init failed: code = %llu, param = %llu, version = 0x%x\n", + code, param, version); + } else { + dev_err(dev, "Found unsupported version %u\n", version); + } + } else { + dev_err(dev, "Unknown SCT Initialization error\n"); + } + + return -EINVAL; +} + +static int qcom_llcc_get_fw_config(struct platform_device *pdev) +{ + const struct slc_sct_mem *slc_mem = NULL; + const struct slc_sct_slice_desc *memslice; + struct device *dev = &pdev->dev; + u32 slice_properties; + struct resource res; + u32 i, sz; + int ret; + + ret = of_reserved_mem_region_to_resource(dev->of_node, 0, &res); + if (ret) { + dev_err(dev, "Unable to locate DT /reserved-memory resource\n"); + return ret; + } + + slc_mem = devm_memremap(dev, res.start, resource_size(&res), MEMREMAP_WB); + if (!slc_mem) { + dev_err(dev, "Failed to memremap SLC shared memory\n"); + return -ENOMEM; + } + + ret = qcom_llcc_verify_fw_config(dev, slc_mem); + if (ret) + return ret; + + sz = le32_to_cpu(slc_mem->slice_descs_count); + + drv_data->desc = devm_kcalloc(dev, sz, sizeof(struct llcc_slice_desc), + GFP_KERNEL); + if (!drv_data->desc) + return -ENOMEM; + + for (i = 0; i < sz; i++) { + memslice = &slc_mem->slice_descs[i]; + drv_data->desc[i].slice_id = le16_to_cpu(memslice->slice_id); + drv_data->desc[i].uid = le16_to_cpu(memslice->usecase_id); + slice_properties = le32_to_cpu(memslice->slice_properties); + /* Set refcount to 1 if FW already activated this descriptor */ + if (FIELD_GET(SLC_SCT_SLICE_ACT_ON_BOOT, slice_properties)) + refcount_set(&drv_data->desc[i].refcount, 1); + } + + drv_data->cfg = NULL; + drv_data->cfg_size = sz; + + return 0; +} + static void qcom_llcc_remove(struct platform_device *pdev) { /* Set the global pointer to a error code to avoid referencing it */ @@ -5096,8 +5295,6 @@ static int qcom_llcc_probe(struct platform_device *pdev) struct platform_device *llcc_edac; const struct qcom_sct_config *cfgs; const struct qcom_llcc_config *cfg; - const struct llcc_slice_config *llcc_cfg; - u32 sz; u8 cfg_index; u32 version; struct regmap *regmap; @@ -5190,32 +5387,31 @@ static int qcom_llcc_probe(struct platform_device *pdev) } } - llcc_cfg = cfg->sct_data; - sz = cfg->size; - drv_data->desc = devm_kcalloc(dev, sz, sizeof(struct llcc_slice_desc), GFP_KERNEL); - if (!drv_data->desc) { - ret = -ENOMEM; - goto err; - } + mutex_init(&drv_data->lock); + if (!cfg->size) { + ret = qcom_llcc_get_fw_config(pdev); + if (ret) + goto err; + } else { + drv_data->cfg = cfg->sct_data; + drv_data->cfg_size = cfg->size; + drv_data->desc = devm_kcalloc(dev, cfg->size, + sizeof(struct llcc_slice_desc), GFP_KERNEL); - for (i = 0; i < sz; i++) { - drv_data->desc[i].slice_id = llcc_cfg[i].slice_id; - drv_data->desc[i].slice_size = llcc_cfg[i].max_cap; - refcount_set(&drv_data->desc[i].refcount, 0); + if (!drv_data->desc) { + ret = -ENOMEM; + goto err; + } + + ret = qcom_llcc_cfg_program(pdev, cfg); + if (ret) + goto err; } - drv_data->cfg = llcc_cfg; - drv_data->cfg_size = sz; + drv_data->ecc_irq = platform_get_irq_optional(pdev, 0); drv_data->edac_reg_offset = cfg->edac_reg_offset; drv_data->ecc_irq_configured = cfg->irq_configured; - mutex_init(&drv_data->lock); - platform_set_drvdata(pdev, drv_data); - - ret = qcom_llcc_cfg_program(pdev, cfg); - if (ret) - goto err; - - drv_data->ecc_irq = platform_get_irq_optional(pdev, 0); + drv_data->dev = dev; /* * On some platforms, the access to EDAC registers will be locked by @@ -5231,6 +5427,8 @@ static int qcom_llcc_probe(struct platform_device *pdev) dev_err(dev, "Failed to register llcc edac driver\n"); } + platform_set_drvdata(pdev, drv_data); + return 0; err: drv_data = ERR_PTR(-ENODEV); @@ -5239,6 +5437,7 @@ static int qcom_llcc_probe(struct platform_device *pdev) static const struct of_device_id qcom_llcc_of_match[] = { { .compatible = "qcom,glymur-llcc", .data = &glymur_cfgs }, + { .compatible = "qcom,hawi-llcc", .data = &hawi_sct_cfgs }, { .compatible = "qcom,ipq5424-llcc", .data = &ipq5424_cfgs}, { .compatible = "qcom,kaanapali-llcc", .data = &kaanapali_cfgs}, { .compatible = "qcom,qcs615-llcc", .data = &qcs615_cfgs}, diff --git a/include/linux/soc/qcom/llcc-qcom.h b/include/linux/soc/qcom/llcc-qcom.h index 227125d84318..b5e917154998 100644 --- a/include/linux/soc/qcom/llcc-qcom.h +++ b/include/linux/soc/qcom/llcc-qcom.h @@ -90,11 +90,13 @@ /** * struct llcc_slice_desc - Cache slice descriptor * @slice_id: llcc slice id + * @uid: Unique ID associated with the llcc device * @slice_size: Size allocated for the llcc slice * @refcount: Atomic counter to track activate/deactivate calls */ struct llcc_slice_desc { u32 slice_id; + u32 uid; size_t slice_size; refcount_t refcount; }; @@ -147,6 +149,7 @@ struct llcc_edac_reg_offset { /** * struct llcc_drv_data - Data associated with the llcc driver + * @dev: device back-pointer for this llcc instance * @regmaps: regmaps associated with the llcc device * @bcast_regmap: regmap associated with llcc broadcast OR offset * @bcast_and_regmap: regmap associated with llcc broadcast AND offset @@ -157,10 +160,11 @@ struct llcc_edac_reg_offset { * @num_banks: Number of llcc banks * @ecc_irq: interrupt for llcc cache error detection and reporting * @ecc_irq_configured: 'True' if firmware has already configured the irq propagation - * @desc: Array pointer of pre-allocated LLCC slice descriptors * @version: Indicates the LLCC version + * @desc: Array pointer of pre-allocated LLCC slice descriptors */ struct llcc_drv_data { + struct device *dev; struct regmap **regmaps; struct regmap *bcast_regmap; struct regmap *bcast_and_regmap; @@ -183,7 +187,7 @@ struct llcc_drv_data { struct llcc_slice_desc *llcc_slice_getd(u32 uid); /** - * llcc_slice_putd - llcc slice descritpor + * llcc_slice_putd - llcc slice descriptor * @desc: Pointer to llcc slice descriptor */ void llcc_slice_putd(struct llcc_slice_desc *desc); -- 2.34.1
