diff options
Diffstat (limited to 'drivers/platform/x86/intel/pmt/class.c')
| -rw-r--r-- | drivers/platform/x86/intel/pmt/class.c | 174 |
1 files changed, 129 insertions, 45 deletions
diff --git a/drivers/platform/x86/intel/pmt/class.c b/drivers/platform/x86/intel/pmt/class.c index 1c9e3f3ea41c..7c3023d5d91d 100644 --- a/drivers/platform/x86/intel/pmt/class.c +++ b/drivers/platform/x86/intel/pmt/class.c @@ -9,45 +9,81 @@ */ #include <linux/kernel.h> +#include <linux/log2.h> +#include <linux/intel_vsec.h> +#include <linux/io-64-nonatomic-lo-hi.h> #include <linux/module.h> #include <linux/mm.h> #include <linux/pci.h> +#include <linux/sysfs.h> -#include "../vsec.h" #include "class.h" -#define PMT_XA_START 0 +#define PMT_XA_START 1 #define PMT_XA_MAX INT_MAX #define PMT_XA_LIMIT XA_LIMIT(PMT_XA_START, PMT_XA_MAX) - -/* - * Early implementations of PMT on client platforms have some - * differences from the server platforms (which use the Out Of Band - * Management Services Module OOBMSM). This list tracks those - * platforms as needed to handle those differences. Newer client - * platforms are expected to be fully compatible with server. - */ -static const struct pci_device_id pmt_telem_early_client_pci_ids[] = { - { PCI_VDEVICE(INTEL, 0x467d) }, /* ADL */ - { PCI_VDEVICE(INTEL, 0x490e) }, /* DG1 */ - { PCI_VDEVICE(INTEL, 0x9a0d) }, /* TGL */ - { } -}; +#define GUID_SPR_PUNIT 0x9956f43f bool intel_pmt_is_early_client_hw(struct device *dev) { - struct pci_dev *parent = to_pci_dev(dev->parent); + struct intel_vsec_device *ivdev = dev_to_ivdev(dev); - return !!pci_match_id(pmt_telem_early_client_pci_ids, parent); + /* + * Early implementations of PMT on client platforms have some + * differences from the server platforms (which use the Out Of Band + * Management Services Module OOBMSM). + */ + return !!(ivdev->quirks & VSEC_QUIRK_EARLY_HW); } -EXPORT_SYMBOL_GPL(intel_pmt_is_early_client_hw); +EXPORT_SYMBOL_NS_GPL(intel_pmt_is_early_client_hw, "INTEL_PMT"); + +static inline int +pmt_memcpy64_fromio(void *to, const u64 __iomem *from, size_t count) +{ + int i, remain; + u64 *buf = to; + + if (!IS_ALIGNED((unsigned long)from, 8)) + return -EFAULT; + + for (i = 0; i < count/8; i++) + buf[i] = readq(&from[i]); + + /* Copy any remaining bytes */ + remain = count % 8; + if (remain) { + u64 tmp = readq(&from[i]); + + memcpy(&buf[i], &tmp, remain); + } + + return count; +} + +int pmt_telem_read_mmio(struct pci_dev *pdev, struct pmt_callbacks *cb, u32 guid, void *buf, + void __iomem *addr, loff_t off, u32 count) +{ + if (cb && cb->read_telem) + return cb->read_telem(pdev, guid, buf, off, count); + + addr += off; + + if (guid == GUID_SPR_PUNIT) + /* PUNIT on SPR only supports aligned 64-bit read */ + return pmt_memcpy64_fromio(buf, addr, count); + + memcpy_fromio(buf, addr, count); + + return count; +} +EXPORT_SYMBOL_NS_GPL(pmt_telem_read_mmio, "INTEL_PMT"); /* * sysfs */ static ssize_t intel_pmt_read(struct file *filp, struct kobject *kobj, - struct bin_attribute *attr, char *buf, loff_t off, + const struct bin_attribute *attr, char *buf, loff_t off, size_t count) { struct intel_pmt_entry *entry = container_of(attr, @@ -63,14 +99,15 @@ intel_pmt_read(struct file *filp, struct kobject *kobj, if (count > entry->size - off) count = entry->size - off; - memcpy_fromio(buf, entry->base + off, count); + count = pmt_telem_read_mmio(entry->pcidev, entry->cb, entry->header.guid, buf, + entry->base, off, count); return count; } static int intel_pmt_mmap(struct file *filp, struct kobject *kobj, - struct bin_attribute *attr, struct vm_area_struct *vma) + const struct bin_attribute *attr, struct vm_area_struct *vma) { struct intel_pmt_entry *entry = container_of(attr, struct intel_pmt_entry, @@ -131,20 +168,49 @@ static struct attribute *intel_pmt_attrs[] = { &dev_attr_offset.attr, NULL }; -ATTRIBUTE_GROUPS(intel_pmt); -static struct class intel_pmt_class = { +static umode_t intel_pmt_attr_visible(struct kobject *kobj, + struct attribute *attr, int n) +{ + struct device *dev = container_of(kobj, struct device, kobj); + struct auxiliary_device *auxdev = to_auxiliary_dev(dev->parent); + struct intel_vsec_device *ivdev = auxdev_to_ivdev(auxdev); + + /* + * Place the discovery features folder in /sys/class/intel_pmt, but + * exclude the common attributes as they are not applicable. + */ + if (ivdev->cap_id == ilog2(VSEC_CAP_DISCOVERY)) + return 0; + + return attr->mode; +} + +static bool intel_pmt_group_visible(struct kobject *kobj) +{ + return true; +} +DEFINE_SYSFS_GROUP_VISIBLE(intel_pmt); + +static const struct attribute_group intel_pmt_group = { + .attrs = intel_pmt_attrs, + .is_visible = SYSFS_GROUP_VISIBLE(intel_pmt), +}; +__ATTRIBUTE_GROUPS(intel_pmt); + +struct class intel_pmt_class = { .name = "intel_pmt", - .owner = THIS_MODULE, .dev_groups = intel_pmt_groups, }; +EXPORT_SYMBOL_GPL(intel_pmt_class); static int intel_pmt_populate_entry(struct intel_pmt_entry *entry, - struct intel_pmt_header *header, - struct device *dev, + struct intel_vsec_device *ivdev, struct resource *disc_res) { - struct pci_dev *pci_dev = to_pci_dev(dev->parent); + struct pci_dev *pci_dev = ivdev->pcidev; + struct device *dev = &ivdev->auxdev.dev; + struct intel_pmt_header *header = &entry->header; u8 bir; /* @@ -174,7 +240,7 @@ static int intel_pmt_populate_entry(struct intel_pmt_entry *entry, /* * Some hardware use a different calculation for the base address * when access_type == ACCESS_LOCAL. On the these systems - * ACCCESS_LOCAL refers to an address in the same BAR as the + * ACCESS_LOCAL refers to an address in the same BAR as the * header but at a fixed offset. But as the header address was * supplied to the driver, we don't know which BAR it was in. * So search for the bar whose range includes the header address. @@ -196,6 +262,13 @@ static int intel_pmt_populate_entry(struct intel_pmt_entry *entry, break; case ACCESS_BARID: + /* Use the provided base address if it exists */ + if (ivdev->base_addr) { + entry->base_addr = ivdev->base_addr + + GET_ADDRESS(header->base_offset); + break; + } + /* * If another BAR was specified then the base offset * represents the offset within that BAR. SO retrieve the @@ -210,8 +283,10 @@ static int intel_pmt_populate_entry(struct intel_pmt_entry *entry, return -EINVAL; } + entry->pcidev = pci_dev; entry->guid = header->guid; entry->size = header->size; + entry->cb = ivdev->priv_data; return 0; } @@ -220,6 +295,7 @@ static int intel_pmt_dev_register(struct intel_pmt_entry *entry, struct intel_pmt_namespace *ns, struct device *parent) { + struct intel_vsec_device *ivdev = dev_to_ivdev(parent); struct resource res = {0}; struct device *dev; int ret; @@ -240,10 +316,10 @@ static int intel_pmt_dev_register(struct intel_pmt_entry *entry, entry->kobj = &dev->kobj; - if (ns->attr_grp) { - ret = sysfs_create_group(entry->kobj, ns->attr_grp); + if (entry->attr_grp) { + ret = sysfs_create_group(entry->kobj, entry->attr_grp); if (ret) - goto fail_sysfs; + goto fail_sysfs_create_group; } /* if size is 0 assume no data buffer, so no file needed */ @@ -268,13 +344,23 @@ static int intel_pmt_dev_register(struct intel_pmt_entry *entry, entry->pmt_bin_attr.size = entry->size; ret = sysfs_create_bin_file(&dev->kobj, &entry->pmt_bin_attr); - if (!ret) - return 0; + if (ret) + goto fail_ioremap; + if (ns->pmt_add_endpoint) { + ret = ns->pmt_add_endpoint(ivdev, entry); + if (ret) + goto fail_add_endpoint; + } + + return 0; + +fail_add_endpoint: + sysfs_remove_bin_file(entry->kobj, &entry->pmt_bin_attr); fail_ioremap: - if (ns->attr_grp) - sysfs_remove_group(entry->kobj, ns->attr_grp); -fail_sysfs: + if (entry->attr_grp) + sysfs_remove_group(entry->kobj, entry->attr_grp); +fail_sysfs_create_group: device_unregister(dev); fail_dev_create: xa_erase(ns->xa, entry->devid); @@ -286,7 +372,6 @@ int intel_pmt_dev_create(struct intel_pmt_entry *entry, struct intel_pmt_namespa struct intel_vsec_device *intel_vsec_dev, int idx) { struct device *dev = &intel_vsec_dev->auxdev.dev; - struct intel_pmt_header header; struct resource *disc_res; int ret; @@ -296,18 +381,17 @@ int intel_pmt_dev_create(struct intel_pmt_entry *entry, struct intel_pmt_namespa if (IS_ERR(entry->disc_table)) return PTR_ERR(entry->disc_table); - ret = ns->pmt_header_decode(entry, &header, dev); + ret = ns->pmt_header_decode(entry, dev); if (ret) return ret; - ret = intel_pmt_populate_entry(entry, &header, dev, disc_res); + ret = intel_pmt_populate_entry(entry, intel_vsec_dev, disc_res); if (ret) return ret; return intel_pmt_dev_register(entry, ns, dev); - } -EXPORT_SYMBOL_GPL(intel_pmt_dev_create); +EXPORT_SYMBOL_NS_GPL(intel_pmt_dev_create, "INTEL_PMT"); void intel_pmt_dev_destroy(struct intel_pmt_entry *entry, struct intel_pmt_namespace *ns) @@ -317,13 +401,13 @@ void intel_pmt_dev_destroy(struct intel_pmt_entry *entry, if (entry->size) sysfs_remove_bin_file(entry->kobj, &entry->pmt_bin_attr); - if (ns->attr_grp) - sysfs_remove_group(entry->kobj, ns->attr_grp); + if (entry->attr_grp) + sysfs_remove_group(entry->kobj, entry->attr_grp); device_unregister(dev); xa_erase(ns->xa, entry->devid); } -EXPORT_SYMBOL_GPL(intel_pmt_dev_destroy); +EXPORT_SYMBOL_NS_GPL(intel_pmt_dev_destroy, "INTEL_PMT"); static int __init pmt_class_init(void) { |