diff options
Diffstat (limited to 'drivers/platform/x86/intel_pmc_core.c')
| -rw-r--r-- | drivers/platform/x86/intel_pmc_core.c | 122 |
1 files changed, 117 insertions, 5 deletions
diff --git a/drivers/platform/x86/intel_pmc_core.c b/drivers/platform/x86/intel_pmc_core.c index 5774882a5300..14aac633479a 100644 --- a/drivers/platform/x86/intel_pmc_core.c +++ b/drivers/platform/x86/intel_pmc_core.c @@ -32,11 +32,65 @@ static struct pmc_dev pmc; +static const struct pmc_bit_map spt_pfear_map[] = { + {"PMC", SPT_PMC_BIT_PMC}, + {"OPI-DMI", SPT_PMC_BIT_OPI}, + {"SPI / eSPI", SPT_PMC_BIT_SPI}, + {"XHCI", SPT_PMC_BIT_XHCI}, + {"SPA", SPT_PMC_BIT_SPA}, + {"SPB", SPT_PMC_BIT_SPB}, + {"SPC", SPT_PMC_BIT_SPC}, + {"GBE", SPT_PMC_BIT_GBE}, + {"SATA", SPT_PMC_BIT_SATA}, + {"HDA-PGD0", SPT_PMC_BIT_HDA_PGD0}, + {"HDA-PGD1", SPT_PMC_BIT_HDA_PGD1}, + {"HDA-PGD2", SPT_PMC_BIT_HDA_PGD2}, + {"HDA-PGD3", SPT_PMC_BIT_HDA_PGD3}, + {"RSVD", SPT_PMC_BIT_RSVD_0B}, + {"LPSS", SPT_PMC_BIT_LPSS}, + {"LPC", SPT_PMC_BIT_LPC}, + {"SMB", SPT_PMC_BIT_SMB}, + {"ISH", SPT_PMC_BIT_ISH}, + {"P2SB", SPT_PMC_BIT_P2SB}, + {"DFX", SPT_PMC_BIT_DFX}, + {"SCC", SPT_PMC_BIT_SCC}, + {"RSVD", SPT_PMC_BIT_RSVD_0C}, + {"FUSE", SPT_PMC_BIT_FUSE}, + {"CAMERA", SPT_PMC_BIT_CAMREA}, + {"RSVD", SPT_PMC_BIT_RSVD_0D}, + {"USB3-OTG", SPT_PMC_BIT_USB3_OTG}, + {"EXI", SPT_PMC_BIT_EXI}, + {"CSE", SPT_PMC_BIT_CSE}, + {"CSME_KVM", SPT_PMC_BIT_CSME_KVM}, + {"CSME_PMT", SPT_PMC_BIT_CSME_PMT}, + {"CSME_CLINK", SPT_PMC_BIT_CSME_CLINK}, + {"CSME_PTIO", SPT_PMC_BIT_CSME_PTIO}, + {"CSME_USBR", SPT_PMC_BIT_CSME_USBR}, + {"CSME_SUSRAM", SPT_PMC_BIT_CSME_SUSRAM}, + {"CSME_SMT", SPT_PMC_BIT_CSME_SMT}, + {"RSVD", SPT_PMC_BIT_RSVD_1A}, + {"CSME_SMS2", SPT_PMC_BIT_CSME_SMS2}, + {"CSME_SMS1", SPT_PMC_BIT_CSME_SMS1}, + {"CSME_RTC", SPT_PMC_BIT_CSME_RTC}, + {"CSME_PSF", SPT_PMC_BIT_CSME_PSF}, + {}, +}; + +static const struct pmc_reg_map spt_reg_map = { + .pfear_sts = spt_pfear_map, +}; + static const struct pci_device_id pmc_pci_ids[] = { - { PCI_VDEVICE(INTEL, SPT_PMC_PCI_DEVICE_ID), (kernel_ulong_t)NULL }, + { PCI_VDEVICE(INTEL, SPT_PMC_PCI_DEVICE_ID), + (kernel_ulong_t)&spt_reg_map }, { 0, }, }; +static inline u8 pmc_core_reg_read_byte(struct pmc_dev *pmcdev, int offset) +{ + return readb(pmcdev->regbase + offset); +} + static inline u32 pmc_core_reg_read(struct pmc_dev *pmcdev, int reg_offset) { return readl(pmcdev->regbase + reg_offset); @@ -90,6 +144,45 @@ static int pmc_core_dev_state_get(void *data, u64 *val) DEFINE_DEBUGFS_ATTRIBUTE(pmc_core_dev_state, pmc_core_dev_state_get, NULL, "%llu\n"); +#if IS_ENABLED(CONFIG_DEBUG_FS) +static void pmc_core_display_map(struct seq_file *s, int index, + u8 pf_reg, const struct pmc_bit_map *pf_map) +{ + seq_printf(s, "PCH IP: %-2d - %-32s\tState: %s\n", + index, pf_map[index].name, + pf_map[index].bit_mask & pf_reg ? "Off" : "On"); +} + +static int pmc_core_ppfear_sts_show(struct seq_file *s, void *unused) +{ + struct pmc_dev *pmcdev = s->private; + const struct pmc_bit_map *map = pmcdev->map->pfear_sts; + u8 pf_regs[NUM_ENTRIES]; + int index, iter; + + iter = SPT_PMC_XRAM_PPFEAR0A; + + for (index = 0; index < NUM_ENTRIES; index++, iter++) + pf_regs[index] = pmc_core_reg_read_byte(pmcdev, iter); + + for (index = 0; map[index].name; index++) + pmc_core_display_map(s, index, pf_regs[index / 8], map); + + return 0; +} + +static int pmc_core_ppfear_sts_open(struct inode *inode, struct file *file) +{ + return single_open(file, pmc_core_ppfear_sts_show, inode->i_private); +} + +static const struct file_operations pmc_core_ppfear_ops = { + .open = pmc_core_ppfear_sts_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + static void pmc_core_dbgfs_unregister(struct pmc_dev *pmcdev) { debugfs_remove_recursive(pmcdev->dbgfs_dir); @@ -106,14 +199,31 @@ static int pmc_core_dbgfs_register(struct pmc_dev *pmcdev) pmcdev->dbgfs_dir = dir; file = debugfs_create_file("slp_s0_residency_usec", S_IFREG | S_IRUGO, dir, pmcdev, &pmc_core_dev_state); + if (!file) + goto err; - if (!file) { - pmc_core_dbgfs_unregister(pmcdev); - return -ENODEV; - } + file = debugfs_create_file("pch_ip_power_gating_status", + S_IFREG | S_IRUGO, dir, pmcdev, + &pmc_core_ppfear_ops); + if (!file) + goto err; return 0; + +err: + pmc_core_dbgfs_unregister(pmcdev); + return -ENODEV; +} +#else +static inline int pmc_core_dbgfs_register(struct pmc_dev *pmcdev) +{ + return 0; +} + +static inline void pmc_core_dbgfs_unregister(struct pmc_dev *pmcdev) +{ } +#endif /* CONFIG_DEBUG_FS */ static const struct x86_cpu_id intel_pmc_core_ids[] = { { X86_VENDOR_INTEL, 6, INTEL_FAM6_SKYLAKE_MOBILE, X86_FEATURE_MWAIT, @@ -128,6 +238,7 @@ static int pmc_core_probe(struct pci_dev *dev, const struct pci_device_id *id) struct device *ptr_dev = &dev->dev; struct pmc_dev *pmcdev = &pmc; const struct x86_cpu_id *cpu_id; + const struct pmc_reg_map *map = (struct pmc_reg_map *)id->driver_data; int err; cpu_id = x86_match_cpu(intel_pmc_core_ids); @@ -164,6 +275,7 @@ static int pmc_core_probe(struct pci_dev *dev, const struct pci_device_id *id) if (err < 0) dev_warn(&dev->dev, "PMC Core: debugfs register failed.\n"); + pmcdev->map = map; pmc.has_slp_s0_res = true; return 0; } |