diff options
Diffstat (limited to 'drivers/platform/x86/intel/tpmi.c')
| -rw-r--r-- | drivers/platform/x86/intel/tpmi.c | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/drivers/platform/x86/intel/tpmi.c b/drivers/platform/x86/intel/tpmi.c index 1b87b46ba8a9..e612da579b29 100644 --- a/drivers/platform/x86/intel/tpmi.c +++ b/drivers/platform/x86/intel/tpmi.c @@ -47,6 +47,7 @@ */ #include <linux/auxiliary_bus.h> +#include <linux/intel_tpmi.h> #include <linux/io.h> #include <linux/module.h> #include <linux/pci.h> @@ -96,6 +97,7 @@ struct intel_tpmi_pm_feature { * @vsec_dev: Pointer to intel_vsec_device structure for this TPMI device * @feature_count: Number of TPMI of TPMI instances pointed by tpmi_features * @pfs_start: Start of PFS offset for the TPMI instances in this device + * @plat_info: Stores platform info which can be used by the client drivers * * Stores the information for all TPMI devices enumerated from a single PCI device. */ @@ -104,8 +106,30 @@ struct intel_tpmi_info { struct intel_vsec_device *vsec_dev; int feature_count; u64 pfs_start; + struct intel_tpmi_plat_info plat_info; }; +/** + * struct tpmi_info_header - CPU package ID to PCI device mapping information + * @fn: PCI function number + * @dev: PCI device number + * @bus: PCI bus number + * @pkg: CPU Package id + * @reserved: Reserved for future use + * @lock: When set to 1 the register is locked and becomes read-only + * until next reset. Not for use by the OS driver. + * + * The structure to read hardware provided mapping information. + */ +struct tpmi_info_header { + u64 fn:3; + u64 dev:5; + u64 bus:8; + u64 pkg:8; + u64 reserved:39; + u64 lock:1; +} __packed; + /* * List of supported TMPI IDs. * Some TMPI IDs are not used by Linux, so the numbers are not consecutive. @@ -115,11 +139,20 @@ enum intel_tpmi_id { TPMI_ID_PEM = 1, /* Power and Perf excursion Monitor */ TPMI_ID_UNCORE = 2, /* Uncore Frequency Scaling */ TPMI_ID_SST = 5, /* Speed Select Technology */ + TPMI_INFO_ID = 0x81, /* Special ID for PCI BDF and Package ID information */ }; /* Used during auxbus device creation */ static DEFINE_IDA(intel_vsec_tpmi_ida); +struct intel_tpmi_plat_info *tpmi_get_platform_data(struct auxiliary_device *auxdev) +{ + struct intel_vsec_device *vsec_dev = auxdev_to_ivdev(auxdev); + + return vsec_dev->priv_data; +} +EXPORT_SYMBOL_NS_GPL(tpmi_get_platform_data, INTEL_TPMI); + static const char *intel_tpmi_name(enum intel_tpmi_id id) { switch (id) { @@ -177,6 +210,8 @@ static int tpmi_create_device(struct intel_tpmi_info *tpmi_info, feature_vsec_dev->pcidev = vsec_dev->pcidev; feature_vsec_dev->resource = res; feature_vsec_dev->num_resources = pfs->pfs_header.num_entries; + feature_vsec_dev->priv_data = &tpmi_info->plat_info; + feature_vsec_dev->priv_data_size = sizeof(tpmi_info->plat_info); feature_vsec_dev->ida = &intel_vsec_tpmi_ida; /* @@ -220,6 +255,31 @@ static int tpmi_create_devices(struct intel_tpmi_info *tpmi_info) return 0; } +#define TPMI_INFO_BUS_INFO_OFFSET 0x08 + +static int tpmi_process_info(struct intel_tpmi_info *tpmi_info, + struct intel_tpmi_pm_feature *pfs) +{ + struct tpmi_info_header header; + void __iomem *info_mem; + + info_mem = ioremap(pfs->vsec_offset + TPMI_INFO_BUS_INFO_OFFSET, + pfs->pfs_header.entry_size * 4 - TPMI_INFO_BUS_INFO_OFFSET); + if (!info_mem) + return -ENOMEM; + + memcpy_fromio(&header, info_mem, sizeof(header)); + + tpmi_info->plat_info.package_id = header.pkg; + tpmi_info->plat_info.bus_number = header.bus; + tpmi_info->plat_info.device_number = header.dev; + tpmi_info->plat_info.function_number = header.fn; + + iounmap(info_mem); + + return 0; +} + static int tpmi_fetch_pfs_header(struct intel_tpmi_pm_feature *pfs, u64 start, int size) { void __iomem *pfs_mem; @@ -238,6 +298,7 @@ static int tpmi_fetch_pfs_header(struct intel_tpmi_pm_feature *pfs, u64 start, i static int intel_vsec_tpmi_init(struct auxiliary_device *auxdev) { struct intel_vsec_device *vsec_dev = auxdev_to_ivdev(auxdev); + struct pci_dev *pci_dev = vsec_dev->pcidev; struct intel_tpmi_info *tpmi_info; u64 pfs_start = 0; int i; @@ -248,6 +309,7 @@ static int intel_vsec_tpmi_init(struct auxiliary_device *auxdev) tpmi_info->vsec_dev = vsec_dev; tpmi_info->feature_count = vsec_dev->num_resources; + tpmi_info->plat_info.bus_number = pci_dev->bus->number; tpmi_info->tpmi_features = devm_kcalloc(&auxdev->dev, vsec_dev->num_resources, sizeof(*tpmi_info->tpmi_features), @@ -282,6 +344,16 @@ static int intel_vsec_tpmi_init(struct auxiliary_device *auxdev) pfs->pfs_header.cap_offset *= 1024; pfs->vsec_offset = pfs_start + pfs->pfs_header.cap_offset; + + /* + * Process TPMI_INFO to get PCI device to CPU package ID. + * Device nodes for TPMI features are not created in this + * for loop. So, the mapping information will be available + * when actual device nodes created outside this + * loop via tpmi_create_devices(). + */ + if (pfs->pfs_header.tpmi_id == TPMI_INFO_ID) + tpmi_process_info(tpmi_info, pfs); } tpmi_info->pfs_start = pfs_start; |