diff options
Diffstat (limited to 'drivers/platform')
| -rw-r--r-- | drivers/platform/x86/amd-pmc.c | 45 |
1 files changed, 44 insertions, 1 deletions
diff --git a/drivers/platform/x86/amd-pmc.c b/drivers/platform/x86/amd-pmc.c index 0ebb2732c46a..7f011c3f60f2 100644 --- a/drivers/platform/x86/amd-pmc.c +++ b/drivers/platform/x86/amd-pmc.c @@ -46,6 +46,15 @@ #define AMD_PMC_RESULT_CMD_UNKNOWN 0xFE #define AMD_PMC_RESULT_FAILED 0xFF +/* FCH SSC Registers */ +#define FCH_S0I3_ENTRY_TIME_L_OFFSET 0x30 +#define FCH_S0I3_ENTRY_TIME_H_OFFSET 0x34 +#define FCH_S0I3_EXIT_TIME_L_OFFSET 0x38 +#define FCH_S0I3_EXIT_TIME_H_OFFSET 0x3C +#define FCH_SSC_MAPPING_SIZE 0x800 +#define FCH_BASE_PHY_ADDR_LOW 0xFED81100 +#define FCH_BASE_PHY_ADDR_HIGH 0x00000000 + /* SMU Message Definations */ #define SMU_MSG_GETSMUVERSION 0x02 #define SMU_MSG_LOG_GETDRAM_ADDR_HI 0x04 @@ -96,6 +105,7 @@ static const struct amd_pmc_bit_map soc15_ip_blk[] = { struct amd_pmc_dev { void __iomem *regbase; void __iomem *smu_virt_addr; + void __iomem *fch_virt_addr; u32 base_addr; u32 cpu_id; u32 active_ips; @@ -166,6 +176,29 @@ static int smu_fw_info_show(struct seq_file *s, void *unused) } DEFINE_SHOW_ATTRIBUTE(smu_fw_info); +static int s0ix_stats_show(struct seq_file *s, void *unused) +{ + struct amd_pmc_dev *dev = s->private; + u64 entry_time, exit_time, residency; + + entry_time = ioread32(dev->fch_virt_addr + FCH_S0I3_ENTRY_TIME_H_OFFSET); + entry_time = entry_time << 32 | ioread32(dev->fch_virt_addr + FCH_S0I3_ENTRY_TIME_L_OFFSET); + + exit_time = ioread32(dev->fch_virt_addr + FCH_S0I3_EXIT_TIME_H_OFFSET); + exit_time = exit_time << 32 | ioread32(dev->fch_virt_addr + FCH_S0I3_EXIT_TIME_L_OFFSET); + + /* It's in 48MHz. We need to convert it */ + residency = (exit_time - entry_time) / 48; + + seq_puts(s, "=== S0ix statistics ===\n"); + seq_printf(s, "S0ix Entry Time: %lld\n", entry_time); + seq_printf(s, "S0ix Exit Time: %lld\n", exit_time); + seq_printf(s, "Residency Time: %lld\n", residency); + + return 0; +} +DEFINE_SHOW_ATTRIBUTE(s0ix_stats); + static void amd_pmc_dbgfs_unregister(struct amd_pmc_dev *dev) { debugfs_remove_recursive(dev->dbgfs_dir); @@ -176,6 +209,8 @@ static void amd_pmc_dbgfs_register(struct amd_pmc_dev *dev) dev->dbgfs_dir = debugfs_create_dir("amd_pmc", NULL); debugfs_create_file("smu_fw_info", 0644, dev->dbgfs_dir, dev, &smu_fw_info_fops); + debugfs_create_file("s0ix_stats", 0644, dev->dbgfs_dir, dev, + &s0ix_stats_fops); } #else static inline void amd_pmc_dbgfs_register(struct amd_pmc_dev *dev) @@ -353,7 +388,7 @@ static int amd_pmc_probe(struct platform_device *pdev) struct amd_pmc_dev *dev = &pmc; struct pci_dev *rdev; u32 base_addr_lo, base_addr_hi; - u64 base_addr; + u64 base_addr, fch_phys_addr; int err; u32 val; @@ -405,6 +440,14 @@ static int amd_pmc_probe(struct platform_device *pdev) mutex_init(&dev->lock); + /* Use FCH registers to get the S0ix stats */ + base_addr_lo = FCH_BASE_PHY_ADDR_LOW; + base_addr_hi = FCH_BASE_PHY_ADDR_HIGH; + fch_phys_addr = ((u64)base_addr_hi << 32 | base_addr_lo); + dev->fch_virt_addr = devm_ioremap(dev->dev, fch_phys_addr, FCH_SSC_MAPPING_SIZE); + if (!dev->fch_virt_addr) + return -ENOMEM; + /* Use SMU to get the s0i3 debug stats */ err = amd_pmc_setup_smu_logging(dev); if (err) |