diff options
Diffstat (limited to 'drivers/platform/x86/amd-pmc.c')
-rw-r--r-- | drivers/platform/x86/amd-pmc.c | 155 |
1 files changed, 145 insertions, 10 deletions
diff --git a/drivers/platform/x86/amd-pmc.c b/drivers/platform/x86/amd-pmc.c index 3481479a2942..b7e50ed050a8 100644 --- a/drivers/platform/x86/amd-pmc.c +++ b/drivers/platform/x86/amd-pmc.c @@ -17,9 +17,11 @@ #include <linux/delay.h> #include <linux/io.h> #include <linux/iopoll.h> +#include <linux/limits.h> #include <linux/module.h> #include <linux/pci.h> #include <linux/platform_device.h> +#include <linux/rtc.h> #include <linux/suspend.h> #include <linux/seq_file.h> #include <linux/uaccess.h> @@ -29,6 +31,10 @@ #define AMD_PMC_REGISTER_RESPONSE 0x980 #define AMD_PMC_REGISTER_ARGUMENT 0x9BC +/* PMC Scratch Registers */ +#define AMD_PMC_SCRATCH_REG_CZN 0x94 +#define AMD_PMC_SCRATCH_REG_YC 0xD14 + /* Base address of SMU for mapping physical address to virtual address */ #define AMD_PMC_SMU_INDEX_ADDRESS 0xB8 #define AMD_PMC_SMU_INDEX_DATA 0xBC @@ -71,7 +77,7 @@ #define AMD_CPU_ID_YC 0x14B5 #define PMC_MSG_DELAY_MIN_US 100 -#define RESPONSE_REGISTER_LOOP_MAX 200 +#define RESPONSE_REGISTER_LOOP_MAX 20000 #define SOC_SUBSYSTEM_IP_MAX 12 #define DELAY_MIN_US 2000 @@ -110,6 +116,10 @@ struct amd_pmc_dev { u32 base_addr; u32 cpu_id; u32 active_ips; +/* SMU version information */ + u16 major; + u16 minor; + u16 rev; struct device *dev; struct mutex lock; /* generic mutex lock */ #if IS_ENABLED(CONFIG_DEBUG_FS) @@ -118,7 +128,7 @@ struct amd_pmc_dev { }; static struct amd_pmc_dev pmc; -static int amd_pmc_send_cmd(struct amd_pmc_dev *dev, bool set, u32 *data, u8 msg, bool ret); +static int amd_pmc_send_cmd(struct amd_pmc_dev *dev, u32 arg, u32 *data, u8 msg, bool ret); static inline u32 amd_pmc_reg_read(struct amd_pmc_dev *dev, int reg_offset) { @@ -133,7 +143,7 @@ static inline void amd_pmc_reg_write(struct amd_pmc_dev *dev, int reg_offset, u3 struct smu_metrics { u32 table_version; u32 hint_count; - u32 s0i3_cyclecount; + u32 s0i3_last_entry_status; u32 timein_s0i2; u64 timeentering_s0i3_lastcapture; u64 timeentering_s0i3_totaltime; @@ -147,6 +157,49 @@ struct smu_metrics { u64 timecondition_notmet_totaltime[SOC_SUBSYSTEM_IP_MAX]; } __packed; +static int amd_pmc_get_smu_version(struct amd_pmc_dev *dev) +{ + int rc; + u32 val; + + rc = amd_pmc_send_cmd(dev, 0, &val, SMU_MSG_GETSMUVERSION, 1); + if (rc) + return rc; + + dev->major = (val >> 16) & GENMASK(15, 0); + dev->minor = (val >> 8) & GENMASK(7, 0); + dev->rev = (val >> 0) & GENMASK(7, 0); + + dev_dbg(dev->dev, "SMU version is %u.%u.%u\n", dev->major, dev->minor, dev->rev); + + return 0; +} + +static int amd_pmc_idlemask_read(struct amd_pmc_dev *pdev, struct device *dev, + struct seq_file *s) +{ + u32 val; + + switch (pdev->cpu_id) { + case AMD_CPU_ID_CZN: + val = amd_pmc_reg_read(pdev, AMD_PMC_SCRATCH_REG_CZN); + break; + case AMD_CPU_ID_YC: + val = amd_pmc_reg_read(pdev, AMD_PMC_SCRATCH_REG_YC); + break; + default: + return -EINVAL; + } + + if (dev) + dev_dbg(pdev->dev, "SMU idlemask s0i3: 0x%x\n", val); + + if (s) + seq_printf(s, "SMU idlemask : 0x%x\n", val); + + return 0; +} + #ifdef CONFIG_DEBUG_FS static int smu_fw_info_show(struct seq_file *s, void *unused) { @@ -162,9 +215,12 @@ static int smu_fw_info_show(struct seq_file *s, void *unused) seq_puts(s, "\n=== SMU Statistics ===\n"); seq_printf(s, "Table Version: %d\n", table.table_version); seq_printf(s, "Hint Count: %d\n", table.hint_count); - seq_printf(s, "S0i3 Cycle Count: %d\n", table.s0i3_cyclecount); + seq_printf(s, "Last S0i3 Status: %s\n", table.s0i3_last_entry_status ? "Success" : + "Unknown/Fail"); seq_printf(s, "Time (in us) to S0i3: %lld\n", table.timeentering_s0i3_lastcapture); seq_printf(s, "Time (in us) in S0i3: %lld\n", table.timein_s0i3_lastcapture); + seq_printf(s, "Time (in us) to resume from S0i3: %lld\n", + table.timeto_resume_to_os_lastcapture); seq_puts(s, "\n=== Active time (in us) ===\n"); for (idx = 0 ; idx < SOC_SUBSYSTEM_IP_MAX ; idx++) { @@ -201,6 +257,23 @@ static int s0ix_stats_show(struct seq_file *s, void *unused) } DEFINE_SHOW_ATTRIBUTE(s0ix_stats); +static int amd_pmc_idlemask_show(struct seq_file *s, void *unused) +{ + struct amd_pmc_dev *dev = s->private; + int rc; + + if (dev->major > 56 || (dev->major >= 55 && dev->minor >= 37)) { + rc = amd_pmc_idlemask_read(dev, NULL, s); + if (rc) + return rc; + } else { + seq_puts(s, "Unsupported SMU version for Idlemask\n"); + } + + return 0; +} +DEFINE_SHOW_ATTRIBUTE(amd_pmc_idlemask); + static void amd_pmc_dbgfs_unregister(struct amd_pmc_dev *dev) { debugfs_remove_recursive(dev->dbgfs_dir); @@ -213,6 +286,8 @@ static void amd_pmc_dbgfs_register(struct amd_pmc_dev *dev) &smu_fw_info_fops); debugfs_create_file("s0ix_stats", 0644, dev->dbgfs_dir, dev, &s0ix_stats_fops); + debugfs_create_file("amd_pmc_idlemask", 0644, dev->dbgfs_dir, dev, + &amd_pmc_idlemask_fops); } #else static inline void amd_pmc_dbgfs_register(struct amd_pmc_dev *dev) @@ -264,7 +339,7 @@ static void amd_pmc_dump_registers(struct amd_pmc_dev *dev) dev_dbg(dev->dev, "AMD_PMC_REGISTER_MESSAGE:%x\n", value); } -static int amd_pmc_send_cmd(struct amd_pmc_dev *dev, bool set, u32 *data, u8 msg, bool ret) +static int amd_pmc_send_cmd(struct amd_pmc_dev *dev, u32 arg, u32 *data, u8 msg, bool ret) { int rc; u32 val; @@ -283,7 +358,7 @@ static int amd_pmc_send_cmd(struct amd_pmc_dev *dev, bool set, u32 *data, u8 msg amd_pmc_reg_write(dev, AMD_PMC_REGISTER_RESPONSE, 0); /* Write argument into response register */ - amd_pmc_reg_write(dev, AMD_PMC_REGISTER_ARGUMENT, set); + amd_pmc_reg_write(dev, AMD_PMC_REGISTER_ARGUMENT, arg); /* Write message ID to message ID register */ amd_pmc_reg_write(dev, AMD_PMC_REGISTER_MESSAGE, msg); @@ -339,18 +414,73 @@ static int amd_pmc_get_os_hint(struct amd_pmc_dev *dev) return -EINVAL; } +static int amd_pmc_verify_czn_rtc(struct amd_pmc_dev *pdev, u32 *arg) +{ + struct rtc_device *rtc_device; + time64_t then, now, duration; + struct rtc_wkalrm alarm; + struct rtc_time tm; + int rc; + + if (pdev->major < 64 || (pdev->major == 64 && pdev->minor < 53)) + return 0; + + rtc_device = rtc_class_open("rtc0"); + if (!rtc_device) + return 0; + rc = rtc_read_alarm(rtc_device, &alarm); + if (rc) + return rc; + if (!alarm.enabled) { + dev_dbg(pdev->dev, "alarm not enabled\n"); + return 0; + } + rc = rtc_read_time(rtc_device, &tm); + if (rc) + return rc; + then = rtc_tm_to_time64(&alarm.time); + now = rtc_tm_to_time64(&tm); + duration = then-now; + + /* in the past */ + if (then < now) + return 0; + + /* will be stored in upper 16 bits of s0i3 hint argument, + * so timer wakeup from s0i3 is limited to ~18 hours or less + */ + if (duration <= 4 || duration > U16_MAX) + return -EINVAL; + + *arg |= (duration << 16); + rc = rtc_alarm_irq_enable(rtc_device, 0); + dev_dbg(pdev->dev, "wakeup timer programmed for %lld seconds\n", duration); + + return rc; +} + static int __maybe_unused amd_pmc_suspend(struct device *dev) { struct amd_pmc_dev *pdev = dev_get_drvdata(dev); int rc; u8 msg; + u32 arg = 1; /* Reset and Start SMU logging - to monitor the s0i3 stats */ amd_pmc_send_cmd(pdev, 0, NULL, SMU_MSG_LOG_RESET, 0); amd_pmc_send_cmd(pdev, 0, NULL, SMU_MSG_LOG_START, 0); + /* Activate CZN specific RTC functionality */ + if (pdev->cpu_id == AMD_CPU_ID_CZN) { + rc = amd_pmc_verify_czn_rtc(pdev, &arg); + if (rc < 0) + return rc; + } + + /* Dump the IdleMask before we send hint to SMU */ + amd_pmc_idlemask_read(pdev, dev, NULL); msg = amd_pmc_get_os_hint(pdev); - rc = amd_pmc_send_cmd(pdev, 1, NULL, msg, 0); + rc = amd_pmc_send_cmd(pdev, arg, NULL, msg, 0); if (rc) dev_err(pdev->dev, "suspend failed\n"); @@ -363,14 +493,17 @@ static int __maybe_unused amd_pmc_resume(struct device *dev) int rc; u8 msg; - /* Let SMU know that we are looking for stats */ - amd_pmc_send_cmd(pdev, 0, NULL, SMU_MSG_LOG_DUMP_DATA, 0); - msg = amd_pmc_get_os_hint(pdev); rc = amd_pmc_send_cmd(pdev, 0, NULL, msg, 0); if (rc) dev_err(pdev->dev, "resume failed\n"); + /* Let SMU know that we are looking for stats */ + amd_pmc_send_cmd(pdev, 0, NULL, SMU_MSG_LOG_DUMP_DATA, 0); + + /* Dump the IdleMask to see the blockers */ + amd_pmc_idlemask_read(pdev, dev, NULL); + return 0; } @@ -457,6 +590,7 @@ static int amd_pmc_probe(struct platform_device *pdev) if (err) dev_err(dev->dev, "SMU debugging info not supported on this platform\n"); + amd_pmc_get_smu_version(dev); platform_set_drvdata(pdev, dev); amd_pmc_dbgfs_register(dev); return 0; @@ -476,6 +610,7 @@ static const struct acpi_device_id amd_pmc_acpi_ids[] = { {"AMDI0006", 0}, {"AMDI0007", 0}, {"AMD0004", 0}, + {"AMD0005", 0}, { } }; MODULE_DEVICE_TABLE(acpi, amd_pmc_acpi_ids); |