diff options
Diffstat (limited to 'drivers/platform/x86/intel/pmt/telemetry.c')
| -rw-r--r-- | drivers/platform/x86/intel/pmt/telemetry.c | 110 |
1 files changed, 101 insertions, 9 deletions
diff --git a/drivers/platform/x86/intel/pmt/telemetry.c b/drivers/platform/x86/intel/pmt/telemetry.c index 0cea617c6c2e..a4dfca6cac19 100644 --- a/drivers/platform/x86/intel/pmt/telemetry.c +++ b/drivers/platform/x86/intel/pmt/telemetry.c @@ -9,13 +9,21 @@ */ #include <linux/auxiliary_bus.h> +#include <linux/bitops.h> +#include <linux/cleanup.h> +#include <linux/err.h> +#include <linux/intel_pmt_features.h> #include <linux/intel_vsec.h> #include <linux/kernel.h> +#include <linux/kref.h> #include <linux/module.h> +#include <linux/mutex.h> +#include <linux/overflow.h> #include <linux/pci.h> #include <linux/slab.h> +#include <linux/types.h> #include <linux/uaccess.h> -#include <linux/overflow.h> +#include <linux/xarray.h> #include "class.h" @@ -153,7 +161,7 @@ unsigned long pmt_telem_get_next_endpoint(unsigned long start) return found_idx == start ? 0 : found_idx; } -EXPORT_SYMBOL_NS_GPL(pmt_telem_get_next_endpoint, INTEL_PMT_TELEMETRY); +EXPORT_SYMBOL_NS_GPL(pmt_telem_get_next_endpoint, "INTEL_PMT_TELEMETRY"); struct telem_endpoint *pmt_telem_register_endpoint(int devid) { @@ -172,13 +180,13 @@ struct telem_endpoint *pmt_telem_register_endpoint(int devid) return entry->ep; } -EXPORT_SYMBOL_NS_GPL(pmt_telem_register_endpoint, INTEL_PMT_TELEMETRY); +EXPORT_SYMBOL_NS_GPL(pmt_telem_register_endpoint, "INTEL_PMT_TELEMETRY"); void pmt_telem_unregister_endpoint(struct telem_endpoint *ep) { kref_put(&ep->kref, pmt_telem_ep_release); } -EXPORT_SYMBOL_NS_GPL(pmt_telem_unregister_endpoint, INTEL_PMT_TELEMETRY); +EXPORT_SYMBOL_NS_GPL(pmt_telem_unregister_endpoint, "INTEL_PMT_TELEMETRY"); int pmt_telem_get_endpoint_info(int devid, struct telem_endpoint_info *info) { @@ -204,7 +212,88 @@ unlock: return err; } -EXPORT_SYMBOL_NS_GPL(pmt_telem_get_endpoint_info, INTEL_PMT_TELEMETRY); +EXPORT_SYMBOL_NS_GPL(pmt_telem_get_endpoint_info, "INTEL_PMT_TELEMETRY"); + +static int pmt_copy_region(struct telemetry_region *region, + struct intel_pmt_entry *entry) +{ + + struct oobmsm_plat_info *plat_info; + + plat_info = intel_vsec_get_mapping(entry->ep->pcidev); + if (IS_ERR(plat_info)) + return PTR_ERR(plat_info); + + region->plat_info = *plat_info; + region->guid = entry->guid; + region->addr = entry->ep->base; + region->size = entry->size; + region->num_rmids = entry->num_rmids; + + return 0; +} + +static void pmt_feature_group_release(struct kref *kref) +{ + struct pmt_feature_group *feature_group; + + feature_group = container_of(kref, struct pmt_feature_group, kref); + kfree(feature_group); +} + +struct pmt_feature_group *intel_pmt_get_regions_by_feature(enum pmt_feature_id id) +{ + struct pmt_feature_group *feature_group __free(kfree) = NULL; + struct telemetry_region *region; + struct intel_pmt_entry *entry; + unsigned long idx; + int count = 0; + size_t size; + + if (!pmt_feature_id_is_valid(id)) + return ERR_PTR(-EINVAL); + + guard(mutex)(&ep_lock); + xa_for_each(&telem_array, idx, entry) { + if (entry->feature_flags & BIT(id)) + count++; + } + + if (!count) + return ERR_PTR(-ENOENT); + + size = struct_size(feature_group, regions, count); + feature_group = kzalloc(size, GFP_KERNEL); + if (!feature_group) + return ERR_PTR(-ENOMEM); + + feature_group->count = count; + + region = feature_group->regions; + xa_for_each(&telem_array, idx, entry) { + int ret; + + if (!(entry->feature_flags & BIT(id))) + continue; + + ret = pmt_copy_region(region, entry); + if (ret) + return ERR_PTR(ret); + + region++; + } + + kref_init(&feature_group->kref); + + return no_free_ptr(feature_group); +} +EXPORT_SYMBOL(intel_pmt_get_regions_by_feature); + +void intel_pmt_put_feature_group(struct pmt_feature_group *feature_group) +{ + kref_put(&feature_group->kref, pmt_feature_group_release); +} +EXPORT_SYMBOL(intel_pmt_put_feature_group); int pmt_telem_read(struct telem_endpoint *ep, u32 id, u64 *data, u32 count) { @@ -224,7 +313,7 @@ int pmt_telem_read(struct telem_endpoint *ep, u32 id, u64 *data, u32 count) return ep->present ? 0 : -EPIPE; } -EXPORT_SYMBOL_NS_GPL(pmt_telem_read, INTEL_PMT_TELEMETRY); +EXPORT_SYMBOL_NS_GPL(pmt_telem_read, "INTEL_PMT_TELEMETRY"); int pmt_telem_read32(struct telem_endpoint *ep, u32 id, u32 *data, u32 count) { @@ -243,7 +332,7 @@ int pmt_telem_read32(struct telem_endpoint *ep, u32 id, u32 *data, u32 count) return ep->present ? 0 : -EPIPE; } -EXPORT_SYMBOL_NS_GPL(pmt_telem_read32, INTEL_PMT_TELEMETRY); +EXPORT_SYMBOL_NS_GPL(pmt_telem_read32, "INTEL_PMT_TELEMETRY"); struct telem_endpoint * pmt_telem_find_and_register_endpoint(struct pci_dev *pcidev, u32 guid, u16 pos) @@ -268,7 +357,7 @@ pmt_telem_find_and_register_endpoint(struct pci_dev *pcidev, u32 guid, u16 pos) return ERR_PTR(-ENXIO); } -EXPORT_SYMBOL_NS_GPL(pmt_telem_find_and_register_endpoint, INTEL_PMT_TELEMETRY); +EXPORT_SYMBOL_NS_GPL(pmt_telem_find_and_register_endpoint, "INTEL_PMT_TELEMETRY"); static void pmt_telem_remove(struct auxiliary_device *auxdev) { @@ -311,6 +400,8 @@ static int pmt_telem_probe(struct auxiliary_device *auxdev, const struct auxilia continue; priv->num_entries++; + + intel_pmt_get_features(entry); } return 0; @@ -347,4 +438,5 @@ module_exit(pmt_telem_exit); MODULE_AUTHOR("David E. Box <david.e.box@linux.intel.com>"); MODULE_DESCRIPTION("Intel PMT Telemetry driver"); MODULE_LICENSE("GPL v2"); -MODULE_IMPORT_NS(INTEL_PMT); +MODULE_IMPORT_NS("INTEL_PMT"); +MODULE_IMPORT_NS("INTEL_VSEC"); |