diff options
Diffstat (limited to 'drivers/platform/x86/intel/pmt/class.c')
| -rw-r--r-- | drivers/platform/x86/intel/pmt/class.c | 54 |
1 files changed, 37 insertions, 17 deletions
diff --git a/drivers/platform/x86/intel/pmt/class.c b/drivers/platform/x86/intel/pmt/class.c index 1c9e3f3ea41c..46598dcb634a 100644 --- a/drivers/platform/x86/intel/pmt/class.c +++ b/drivers/platform/x86/intel/pmt/class.c @@ -9,6 +9,7 @@ */ #include <linux/kernel.h> +#include <linux/io-64-nonatomic-lo-hi.h> #include <linux/module.h> #include <linux/mm.h> #include <linux/pci.h> @@ -19,29 +20,44 @@ #define PMT_XA_START 0 #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->info->quirks & VSEC_QUIRK_EARLY_HW); } EXPORT_SYMBOL_GPL(intel_pmt_is_early_client_hw); +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; +} + /* * sysfs */ @@ -63,7 +79,11 @@ 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); + if (entry->guid == GUID_SPR_PUNIT) + /* PUNIT on SPR only supports aligned 64-bit read */ + count = pmt_memcpy64_fromio(buf, entry->base + off, count); + else + memcpy_fromio(buf, entry->base + off, count); return count; } |